481 results about "Deep hole drilling" patented technology

The invention discloses a sublevel shrinkage caving stage open afterwards filling mining method. In the earlier stage of stoping, caved ores are utilized to support surrounding rocks on a top tray, and in the later stage of stoping, a goaf area is filled with fillers to control ground pressure so as to achieve safe and efficient mining. Ore blocks are mined in two steps, mining blocks in step two are stoped after the mining blocks in step one are stoped and filled. After the ores are completely let out, the goaf area is filled with the fillers to control the ground pressure. Because the stoping modes of sublevel ore caving, sublevel shrinkage, final ore drawing and empty area afterwards filling are adopted, the mining method has large one-time filling amount and low cost; the method adopts middle-deep hole drilling and blasting and carry scraper ore removal, and the device has high level and large production capacity; the method has the advantages of large production capacity of the sublevel caving method and the stage open stope method, high recovery rate of the filling method, and earth surface protection; the safety is good, and drilling, ore removal and other operations are all carried out in a sublevel drilling and ore removal approach roadway; and the ores can be removed in advance, and the ores can be removed partially after the first sublevel is ready.

Apparatus and methods of using lasers are provided for spalling and drilling holes into rocks. A rock removal process is provided that utilizes a combination of laser-induced thermal stress and laser induced superheated steam explosions just below the surface of the laser / rock interaction to spall the rock into small fragments that can then be easily removed by a purging flow. Single laser beams of given irradiance spall rock and create holes having diameter and depth approximately equal to the beam spot size. A group of the single laser beams are steered in a controllable manner by an electro-optic laser beam switch to locations on the surface of the rock, creating multiple overlapping spalled holes thereby removing a layer of rock of a desired diameter. Drilling of a deep hole is achieved by spalling consecutive layers with an intermittent feed motion of the laser head perpendicular to the rock surface.

An edge-carrying drill body intended for deep hole drilling, is rotatable around a central geometric axis and comprises a through-channel arranged for internal chip evacuation. The channel mouths in front and rear ends of the drill body. A front channel mouth is bridged-over by a bridge on which a plurality of cutting edges are formed, which edges are made integrally with the rest of the bridge. The front mouth includes inlets disposed in front of respective cutting edges with reference to the direction of rotation of the body.

An integral structure of a turn-milling complex machining center is disclosed, characterized by a single post and feeding boxes hung at two sides. The left-suspending feeding box is provided with a B-axis cutter holder device with cutters at three locations. The B-axis cutter holder device is used for the working procedures for crank machining like turning, milling, boring, deep-hole drilling, threading and the like. The right-suspending feeding box can be provided with a large-scale milling cutter disc for external milling machining of the crank shaft. Two spindle boxes have two Cf-axis structures, the two spindle boxes are movable along a Z-axis on the machine body, and the tip of the right spindle box is stretchable. The machine is fitted with a plurality of hydraulic self-centering center rests that have high precision retentivity. A guide rail on the machine body forms an angle of inclination of 30 degrees with a horizontal plane, and the plane of the machine body is completely ground to ensure the absence of scraps and dead corners. The entire machine is fully protected. An inner cavity of the guide rail for the operation of the single post of the machine body is supported by double ribs, and two sets of corners remain stressed all the time in the process of the operation of the post. A front support bearing of the spindle employs an imported large-diameter double-column cylindrical roller bearing. The invention solves three problems and the machining for parts of a main journal and a connecting journal of the crank prior to grinding can be completed by one-time mounting on a machine, thus realizing high-precision and high efficient machining for the crank shaft of a medium speed machine for ships; in addition, the invention bears heavy load and is fully-protected.

The invention discloses a method for recycling ore pillars by a middle-deep hole and deep hole united blasting technique. The method comprises the following steps: arranging middle-deep hole drilling drifts on barrier pillars of a worked-out chamber; arranging a plurality of rows of middle-deep hole blast-hole sets on the walls of the middle-deep hole drilling drifts; arranging a cutting slot gate way in each middle-deep hole drilling drift, and arraying a plurality of groups of blast-hole sets in the cutting slot gate way; excavating a deep hole drilling drifts in top pillars and arranging a plurality of rows of deep hole blast-hole sets on the walls of the deep hole drilling drifts; arranging nonel detonators on the bottoms of the middle-deep hole blast holes and the middle parts of the deep hole blast holes; using a complex network structure to be connected with the blast holes; using non-electric nonel detonators to detonate the main detonating cord for detonation, and detonating branch detonating cords by the main detonating cord; transmitting detonation wave to each non-electric millisecond detonator section by the connected detonators, and controlling each row of blast holes to detonate in sequence to complete ore pillar detonation; and recycling the detonated ore pillars after ventilation. With the adoption of the method, the barrier pillars and top pillars above the bottom pillars can be once detonated, thereby rate of ore dilution is reduced and the recovery rate is improved.

The invention provides a telescopic double-edged deep-hole boring cutter, aims to provide a deep-hole drilling boring cutter which has large length-diameter ratio, small self-excited vibration of a boring bar, reliable and stable feeding operation, no radial motion of a cutter arbor, and radial feeding of a cutting edge in a cutting process, and solves the problem that the deep-hole bottle cavity with large length-diameter ratio has large processing difficulty. The boring cutter comprises the boring bar which can extend to the deep-hole bottle cavity, wherein the central axis of the boring bar is provided with a through hole which runs through the central axis; a push rod (2) which is connected with a radial feeding device of the head of the boring bar is arranged in the through hole; the rear end of the push rod (2) is provided with a rotating handle; the rotating handle rotates a screw (5) and pushes the push rod (2) to do radial telescopic motion in the through hole of the boring bar; and the push rod (2) moves by way of pushing or pulling to drive the radial feeding device connected with the push rod and adjust the cutting edge of the double-edged boring cutter on a cutter block (3) to radically feed in the deep-hole bottle cavity.

A cutting tool of the sort used for deep hole drilling has a cutting head mounted on a shank. The cutting head is formed asymmetrically with respect to a longitudinal axis and has at least one cutting edge. The cutting head has guiding segments that extend from a forward end to a rear end of the cutting head. Each of the guiding segments has a guiding pad in the periphery thereof. A forward end of the guiding pad lies on a cylindrical envelope defined by the cutting diameter of the cutting tool. A rear engagement portion of the cutting head is engaged with a forward engagement portion of the shank. The cutting head is made from sintered carbide powders and the guiding pads are integrally formed with the cutting head.

The invention provides a deep hole drilling machine which belongs to the technical field of machining equipment. The drilling machine solves the problems that the traditional deep hole drilling machine has poor guidance, poor stability, no high machining precision, no high efficiency and a not enough compact structure. The deep hole drilling machine comprises a lathe bed, a power head and a tailstock, wherein the lathe bed is provided with a horizontally arranged slide rail ; the tailstock and the power head are arranged on the slide rail; the power head is provided with a horizontally arranged feed main shaft and a driving motor I for driving the feed main shaft to rotate; one end of the feed main shaft can be connected with a cutting tool; a driving mechanism I is arranged between the power head and the lathe bed and can drive the power head to slide along the slide rail; the tailstock is provided with a jig; and a driving mechanism II is arranged between the tailstock and the lathe bed and can drive the tailstock to slide along the slide rail. The lathe bed of the deep hole drilling machine is provided with the driving mechanism I for driving the power head to slide along the slide rail and the driving mechanism II for driving the tailstock to slide along the slide rail, so that the design is reasonable and the structure is compact; moreover, the lathe bed is provided withthe guide rail and a guide holder, thereby the machining precision of deep holes is improved.

The invention discloses numerical control vibration deep-hole drilling and boring machining equipment, which is characterized by comprising a workpiece arranged on a machine tool body, a drill bit and a drill stem, wherein the workpiece is driven by a main motor to rotate; and the drill bit is driven by the motor to rotate along with the drill stem and is simultaneously driven by a servo reducing motor and a vibration motor to make numerical control feed movement and axial reciprocating vibration. By the deep-hole drilling and boring equipment, the functions of rotating the workpiece and the drill bit in a bidirectional mode and axial vibration drilling can be realized, the severe working conditions and the lubricating effect of a cutting area of the drill bit are improved, the cuttings are automatically controlled, the process range of the equipment is greatly widened, the machining precision indexes of the holes such as roundness and straightness are improved, and the hole machining quality and efficiency are improved further; and moreover, the problem of chip breakage and removal in the prior art is solved, the cuttings can be automatically separated, collected and conveyed, automation of the drilling process is realized, and the equipment can be widely applied to the field of machining of rotary deep-hole parts.

The invention discloses a numerical control precision micro-fine super-long deep hole drilling machine which comprises a workbench, a master control cabinet, a linear motor and a servo motor. An output shaft of the servo motor is provided with a drilling bit. The linear motor comprises a primary part installed on the master control cabinet and a secondary part where the servo motor is installed. The secondary part drives the servo motor to move so as to enable the drilling bit to stretch out or retract back above the workbench. The workbench comprises a lifting base and a workbench top arranged on the lifting base. A clamp for fixing a workpiece is installed on the workbench top. According to the numerical control precision micro-fine super-long deep hole drilling machine, the linear motor is used as a feeding power source of the drilling bit, intermediate transmission links such as a gear, a worm gear pair, a belt, a lead screw pair, a coupler and a clutch which are needed in an existing transmission chain from a motor used as a power source to a working component are abandoned, and rotational inertia, elastic deformation, a backlash, motion hysteresis, friction, vibration, noise and abrasion of the intermediate transmission links are avoided; the numerical control precision micro-fine super-long deep hole drilling machine is high in degree of automation, easy to operate, high in control precision, stable in motion, low in noise, long in service life, safe and reliable.

A small-diameter drill for deep hole drilling is provided which is capable of inhibiting the cutting chips from getting bitten and producing a straightness for a drilled hole, thus suitable for drilling a hole having a depth (L) which is 15 or more times the diameter (D) of a drilled hole. The small-diameter drill 1 has a diameter 2 which is 1 mm or less and a drill section 5 including cutting edge(s) 3 and flute(s) 4. The length 11 of the flute 4 is at least 5 times and at most 10 times the drill diameter 2. The diameter of the drill section 5, after being reduced in diameter from the cutting edge 3 toward the rear of the drill section 5, is expanded in diameter so that the outer diameter at the end of the flute 4 becomes at least 0.9 times and at most 0.98 times the drill diameter 2. Anexpanded-diameter portion 10 is provided between the drill section 5 and a neck section 6 connected to a shank 7 and is expended in diameter from the outer diameter at the end 9 of the flute 4 up to 1 or less times the drill diameter 2. The diameter of the neck section 6 is smaller than the drill diameter 2, and the length 12 of the neck section 6 is 10 or more times the drill diameter 2.

The invention relates to a drilling mechanism and a drill loader. The drilling mechanism comprises a drilling arm and a bracket mounted on the drilling arm, a sliding frame is slidably arranged on the bracket, a sliding frame telescopic oil cylinder is arranged in the sliding frame, a positioning tip is fixed at one end of the sliding frame telescopic oil cylinder, the other end of the sliding frame telescopic oil cylinder is fixed in the sliding frame, and a brazing tool is fixed on the positioning tip. The telescopic oil cylinder is arranged in the sliding frame, and after the sliding frame telescopic oil cylinder extends, the long brazing tool can be mounted on the positioning tip on the end portion of the sliding frame to meet requirements on deep-hole drilling in engineering construction; after the sliding frame telescopic oil cylinder shortens, the length of the sliding frame can be greatly reduced, requirements on drilling of a top anchor rod hole by erecting the sliding frame in limited tunnel space can be met, drilling range is widened, and practicability is improved.

The invention discloses a method for preventing rock burst by manually regulating tunnel surrounding rock support energy dissipation characteristics. When a mining tunnel is formed, high-strength metal supports with inherent frequency away from rock burst vibration frequency are used for supporting the surface of the tunnel, a buffer damping layer is filled between the metal supports and a tunnel surrounding rock support, an energy dissipation damping layer is formed by the technology of deep hole drilling and deep hole deep section gap millisecond explosion, and a vibration detecting sensor and a monitoring analyzer are used for detecting energy dissipation damping effects of a surrounding rock composite layer. Process parameters such as metal support radius and mutual distance of the metal supports, and thickness of the buffer damping layer and the energy dissipation damping layer are regulated optimally and manually to achieve optimal energy dissipation damping effects and prevent rock burst, and accordingly coal mine production safety accidents caused by rock burst and mine vibration can be avoided effectively.

The invention discloses a numerical control inverted double-station deep hole drilling machine. The numerical control inverted double-station deep hole drilling machine comprises a double-station machine body component, wherein the rear table surface of the machine body component is fixedly and vertically provided with a left frame type upright post component and a right frame type upright post component; two frame type compressing components are connected with the left upright post component and the right upright post component respectively along a sliding plate up and down by taking a slide rail as a guide; the compressing components are provided with drill bushing assembly seats, drill bushings and hydraulic oil cylinders, so that workpieces can be positioned and clamped; the front table surface of the machine body component is fixedly provided with a left main shaft component and a right main shaft component; the main shaft of the main shaft components is provided with a special deep hole gun drill; both sides of the machine body component are fixedly provided with variable frequency speed regulation motors; and the variable frequency speed regulation motors are in transmission connection with the main shaft components through synchronous belts. An inverted structure that a drill is arranged on the lower side effectively improves the chip removal and the heat dissipation during the deep hole machining and improves the surface accuracy of parts at the same time. A left working unit and a right working unit can be alternately used in waiting time during operation, so that the production efficiency is improved.

The invention provides a four-spindle deep-hole drilling machine and belongs to the technical field of tools. The four-spindle deep-hole drilling machine solves the problems of expensive equipment, high machining costs, the low machining efficiency and the like due to the fact that multi-hole and multi-direction drilling of workpieces is difficult to complete once on ordinary tools and multiple times of clamping and machining is required. The four-spindle deep-hole drilling machine comprises a machine body, a clamp is arranged in the middle of the machine body, transverse guide rails are arranged on two sides of the clamp respectively, transverse sliding tables capable of sliding along the transverse guide rails are arranged on the transverse guide rails respectively, and workpiece drilling mechanisms are arranged on the two transverse sliding tables respectively. A plurality of straight long drills are arranged on each transverse sliding table and driven synchronously through motors on the transverse sliding tables. Compared with 30 minutes required for machining of a vehicle gear box product, only 5 to 7 minutes are required by the four-spindle deep-hole drilling machine, the production time is greatly saved, and the four-spindle deep-hole drilling machine has the advantages of being capable of reducing the production time greatly, suitable for large batch production and the like.

The invention discloses a preparation method of a multicore composite rod of low-temperature superconducting wire Cu / Nb, which comprises the steps of: drilling a plurality of uniformly distributed through holes with the diameter of phi 10mm to 15mm on an oxygen-free copper ingot along the length direction of the ingot with a deep hole drilling method; then cleaning; inserting a Nb rod which has the same dimension with that of the through holes of the porous copper ingot into a clean copper ingot to form a multicore composite sheath; adding a bottom and a cover on both ends of the multicore composite sheath; then carrying out electron beam sealing welding; heating the multicore sheath within 30 to 60 minutes to 500 DEG C to 600 DEG C; keeping the temperature for 1 to 5 hours; and then carrying out backward extrusion to obtain the multicore composite rod of low-temperature superconducting wire Cu / Nb. The preparation method of the multicore composite rod of low-temperature superconducting wire Cu / Nb has the advantages of smaller assembly difficulty, simplification of technological process, smaller interface combination risk, higher quality stability and higher yield of the composite rod.

An edge-carrying drill body intended for deep hole drilling, is rotatable around a central geometric axis and comprises a through-channel arranged for internal chip evacuation. The channel mouths in front and rear ends of the drill body. A front channel mouth is bridged-over by a bridge on which a plurality of cutting edges are formed, which edges are made integrally with the rest of the bridge. The front mouth includes inlets disposed in front of respective cutting edges with reference to the direction of rotation of the body.

The invention discloses a turn-milling combination machining process for shaft parts of a special-shaped structure. The process includes the steps that a clamping mode of clamping-ejecting is adopted on a center lathe, so that rough turning of outer circles is carried out; alignment, positioning and clamping are carried out on the center lathe, so that rough milling of wing surfaces is carried out; forged parts are subjected to ultrasonic non-destructive testing, and whether defects exist is tested; deep hole drilling is carried out on the center lathe; rough plunge milling of deep cavities and machining of radial holes are carried out on a numerical control milling machine; semifinishing of the outer circles and boring machining of deep holes are carried out on a numerically controlled lathe; stress relief annealing is carried out on the parts; and the clamping mode of clamping-ejecting is adopted on a turn-milling combination center machine tool, so that finish machining is carried out on the wing surfaces, the deep cavities and the outer circles. According to the turn-milling combination machining process, multiple machining items can be carried out on different machine tools, the utilization rate of the machine tools is increased, and batch production is facilitated; machining procedures are reduced, and production efficiency is improved; finish machining is carried out on a turn-milling combination center, so that positioning errors are reduced, and machining precision is improved.

The invention relates to a deep hole drilling machine for mining, comprising a rack (1), crawler units arranged at the two sides of the rack (1), an operating mechanism (3) arranged on the rack (1), a hydraulic system for driving each part, an electric appliance system (5) and an operating floor (6). The deep hole drilling machine is characterized in that the operating mechanism consists of a power head (3.1), a stand column (3.2), a carriage (3.3), a lift cylinder (3.4), an adjustment cylinder (3.5), a support slideway (3.6), a skid (3.7), a rotary hanging side (3.8), a swing bearing (3.9), a sliding seat (3.12) and a strut (3.13). The deep hole drilling machine for mining in the invention has wide application range, can be used for implementing intensive drilling in softrock or coal bedthe driving face of which has a requirement on protrusion-dispelling measures, and is also applicable to other occasions. The deep hole drilling machine has the characteristics of compact structure, flexible operation, good maneuverability, whole section operation, favorable safety, all-in-one design and the like, and can drill in complex formations besides detecting water and gas.

The invention provides a core sampling drilling rig, which includes a main rack, a walking mechanism, a power head, an automatic rod feeding mechanism and an automatic rod taking mechanism. The automatic rod feeding mechanism includes a storage mechanism, a transporting mechanism and a supporting mechanism, and the automatic taking mechanism includes a lifting mechanism, a grasping spindle attitude transformation mechanism and a manipulator grasping mechanism. According to the technical scheme, the core sampling drilling rig has the effects that structural design of the automatic rod feeding mechanism is ingenious, and automatic transmission of rod pieces with two or more sizes can be realized; structural design of the automatic rod taking mechanism is ingenious, alternate automatic grasping of the rod pieces with two or more different diameters and sizes can be realized, the rod pieces are automatically and additionally installed onto the inclined or vertical power head, or the rod pieces on the power head are disassembled in sequence for recycling, core sampling misering, rotary excavating misering, well drilling or deep hole drilling and other drilling functions can be achievedby simply changing a drilling tool at the tail end; and the degree of automation of the whole core sampling drilling rig is high, automation of core sampling or outer casing pipe loading and unloadingis realized, and tedious manual operation is avoided.

The invention discloses an intensity distribution test device for a deep-hole drilling rock and earth mass. The intensity distribution test device comprises a power supply, a drilling system and a data acquisition system, wherein the drilling system comprises a convex-tooth conical drill bit, a spiral drill rod, a rotating ring, a drill, a hole-drilling rack and an operating handle; the convex-tooth conical drill bit is connected with the spiral drill rod in a fastening manner; the spiral drill rod is in threaded connection with the drill; the drill is fixedly arranged on the hole-drilling rack and is connected with the power supply; the data acquisition system comprises a pushing-twisting sensor, a rotating speed sensor, a current meter and a laser ranger which are connected with the power supply; and all the devices respectively output thrust and torsion, the rotating speed of the drill rod, current and drill rod footage signal data to a data acquirer connected with a micro computer. The intensity distribution test device is simple and is convenient for construction, can obtain the intensity distribution of the rock and earth mass while drilling and can supply intuitive and detail data.

A drill head (100) for a BTA / STS or ejector deep hole drilling tool, comprising a drill head body (101) that can be rotated about an axis of rotation (113), having a drilling side (160) and a hollow channel (107) with a chip collecting opening (106) on the drilling side (160), a cutting blade (109) located thereon, which has a main cutting blade edge (114) and a secondary cutting blade edge (115), wherein the secondary cutting blade is arranged on a radial outer side of the cutting blade and the main cutting blade edge (114) and the secondary cutting blade edge (115) form a cutting blade corner (120) and define a face (108), which is arranged adjacent to the chip collecting opening (106), and bearing pads (110, 111), wherein a first bearing pad (111) is arranged in the circumferential half of the drill head body (101) that is averted away from the face (108); and a second bearing pad (110) is arranged diametrically opposite the cutting blade corner (120). At the same time, it is provided that the first bearing pad (111) is arranged offset from the cutting blade corner (120) by a bearing pad angle (112), measured in the circumferential direction of the drill head (100). According to the invention, the bearing pad angle (112) is less than 70 degrees.

A method for machining an input shaft of a main reducing gear of a heavy load automobile is characterized by comprising the following steps of (1) blanking and forging, (2) rough turning, (3) surface treatment, (4) finish turning, (5) hobbing, (6) deep hole drilling, (7) radial hole drilling, (8) plane milling, (9) quenching treatment, (10) external grinding, (11) steel ball pressing, and (12) cleaning, oil applying, rust preventing and being putting in storage. Through the method, machining is convenient, product quality and production efficiency are improved, the service life is prolonged, and potential safety risks are avoided.

The invention relates to a unit head structure of deep hole drilling machine. The front end part of an output shaft of a spindle motor extends into a hollow cavity of a motor mounting box body; an output shaft of the spindle motor is provided with a drive wheel; a spindle seat is fixed on a front box body and the spindle seat is internally connected with a spindle in a rotating way; a synchronous drive belt is fixed on a synchronous pulley and the drive wheel; the spindle is sheathed with a spindle bushing and is fixed with a tool holder clip. The invention is characterized in that shaft holes are arranged inside the spindle and the tool holder clip; a rotary joint is arranged in the rear end part of the shaft hole of the spindle; a gun drill is arranged in the front end part of the shaft hole of the tool holder clip; the gun drill is internally provided with a cooling liquid ejection hole communicated with the shaft holes of the spindle and the tool holder clip. With wide range of rotation speed, the invention can achieve 500 to 8,000r / min stepless speed regulation; with small structure, the motor can be arranged on the left side or right side of the rectangular box body according to the need; cooling liquid of 12MPa can pass through the spindle; the fixation of the gun drill is convenient and the axial fine regulation can be made.

The invention discloses a driving shaft processing technique. The driving shaft processing technique includes the steps of forging, normalizing, rough turning, finish turning, deep-hole drilling, hobbing, oil-hole drilling, carburizing, induction hardening, external grinding and completion of finished products. Surface hardness and core tenacity of driving shafts produced by the driving shaft processing technique can be improved, and deformation of the driving shafts can be reduced.

The invention discloses a chamber and deep hole blasting method of a gob. The method of the invention comprises the steps of: firstly extracting a rib pillar and support pillars or bottom support pillars on the two sides of the rib pillar from the top down, and then, performing deep hole blasting on the hanging side of the worked out section along the ore body direction after extracting the ore pillars at each 2-3 middle segments, filling the barren rocks generated in deep hole blasting and a horizontal construction tunnel of deep hole drilling in the worked out section on the lower part of the construction tunnel formed by extraction in situ, namely, filling the worked out section on the lower part to certain thickness after extracting the ore pillars, cutting a part of triangular prism loads moved downward of the hanging side and avoiding the excessive damage of the surrounding rock of the reserved hanging side so as to limit the hanging side and the reserved rib pillar from generating excessive rock mass movement or damage toward the worked out section; and if the barren rocks generated in the deep hole blasting and the construction tunnel cannot meet the filling thickness and filling demand of the worked out section on the lower part, performin auxiliary chamber blasting along the hanging side direction can be conducted, and the gob is treated to limit the hanging side from generating excessive rock mass movement or damage so as to protect the integrity of the upper layer ore body lagging behind in the extraction operation.

A drill head for a deep hole drilling tool. A drill head body is rotatable about an axis of rotation and has a drilling side and a cavity duct with a chip collecting orifice. A cutting edge has a main and a secondary cutting edge cant, the secondary cutting edge cant arranged on a radial outside of the cutting edge. The main and the secondary cutting edge cants form a cutting edge corner and span a rake which is arranged contiguously to the chip collecting orifice. A first guide pad is arranged in a circumferential half, facing away from the rake, and a second guide pad is arranged diametrically opposite the cutting edge corner. The first guide pad can be offset to the cutting edge corner by the amount of a guide pad angle in the circumferential direction of the drill head The guide pad angle amounts to less than 70°.

The invention relates to the field of machining equipment, in particular to equipment for drilling multiple holes simultaneously. The equipment comprises a lathe bed, a radial drilling machine and a multiple-hole synchronization tool, wherein the radial drilling machine and the multiple-hole synchronization tool are mounted on the lathe bed; a gearbox is mounted on the radial drilling machine; the input end of the gearbox is connected with the output shaft of the radial drilling machine; ten drill bit mounting seats are arranged at the output end of the gearbox; the multiple-hole synchronization tool is positioned under the gearbox; the gearbox is connected with the multiple-hole synchronization tool through guide pillars; and ten drilling working positions are arranged on the multiple-hole synchronization tool and in one-to-one-correspondence with the ten drill bits. According to the equipment, the requirement for synchronous drilling and synchronous tapping is met through the cooperation of the gearbox and the multiple-hole synchronization tool and the rotating directions and rotating speeds of all the drill bits are consistent; and unstable impact force in the drilling and tapping process is effectively buffered through springs and spring cylinders on the guide pillars, and the drill bits are prevented from being broken or ejecting out in the deep hole drilling operation.

The invention relates to a method of producing supercritical main stop governing valve by casting, and the method achieves the aim of replacing forging by casting by the improving of molten steel components control, pouring mode and heat treatment process, which greatly reduces the production cost. The pouring mode is the bottom pouring mode in a vertical state with a casting head on the upper part of the pouring position and an insulating sleeve is provided outside the casting head.The heat treatment process comprises techniques of quenching and double tempering. In order to obtaining casting parts with compact tissue, middle cavities of the casting parts are full of molten steel, axial cord shrinkage and shortage parts of the middle portion are removed by using a deep hole drilling, and the casting parts are then reprocessed for satisfying the requirements of the size of the middle cavities. Mechanical properties of the casting products comprises a yield strength delt0.2>=520MPa, a tensile strength deltb>=680-850MPa, a tensile stretch delt5>=15%, a reduction in cross section psi >=40% and an impact energy AkU >= 30J.