30results about How to "Improve internal surface quality" patented technology

The invention relates to a damping and vibration reduction cutter rod. The knife rod includes: a knife handle (2) and a cutter head (1) arranged at the lower end of the knife handle (2), and a cylindrical cavity (4) is coaxially arranged in the knife handle (2). Damping particles (5) are sealed and filled in the cylindrical cavity (4). The present invention has the advantages that: 1) the anti-vibration cutter of the particle damping and vibration-reduction system is used in the vibration-damping cutter bar, which can realize a large length-to-diameter ratio at a relatively low cost, making the processing process simpler and more efficient. high. 2) The vibration-damping tool holder of the present invention can improve the machining precision of the tool and prolong the life of the tool. 3) At the same time, in mechanical processing, the use of vibration-damping tools can improve the quality of surface processing and greatly improve work efficiency, especially in boring tools, using this vibration-damping tool bar to bore and cut deep holes, improve the quality of the inner surface and speed up boring Cutting speed will help a lot.

The invention relates to the technical field of production and processing of seamless steel pipes, and in particular relates to a process for a thin-wall hot-rolled seamless steel tube in double mandrel two-roll rotary rolling production, the thin-wall hot-rolled seamless steel tube is capable of performing two-roll rotary rolling at a high remaining temperature after perforation, the seamless steel tube has the advantages of high production efficiency, high quality and low production cost, a perforated hollow billet is secondarily heated, then a mandril passes through the hollow billet in advance, while the mandril passes through the hollow billet in advance, a lubricant is sprayed, the mandril sprayed with the lubricant passes through the hollow billet, then enters a two-roll rotary rolling set for rolling, a rolled pierced billet enters a three-time heating furnace for three times of heating, after the three times of heating, a hot finished tube is formed by reducing, sizing and shaping, and a finished tube formed by cooling of the hot finished tube is straightened, copped, inspected, packed, labeled, and stored to form a commercial tube, roll burst of the horizontal tissue of the seamless steel tube rolled by the process is not easy to produce, black threads are not easy to produce, the outer diameter sizes of the front end and the back end are improved by 25%, and the accuracy is increased by 20%.

The invention discloses a pipe pulling and drawing lubricating device, and further discloses a pipe pulling and drawing machining method. The pipe pulling and drawing lubricating device comprises an oil supplying mechanism arranged on a chain broaching machine and a lubricating pipe connected with the oil supplying mechanism. The oil supplying mechanism comprises an oil box for storing lubricatingoil, an oil injecting pipe connected with the lubricating pipe and an oil injecting pump connected to the position between the oil box and the oil injecting pipe. The lubricating pipe is composed ofa flat and straight steel pipe, a sealing plate arranged at one end of the flat and straight steel pipe and a connecting rod mounted on the end face of the sealing plate and used for being connected with a pulling and drawing core head. The flat and straight steel pipe is composed of an oil injecting section, a clamping section and a connecting section. The pipe pulling and drawing machining method comprises the steps of 1, preparation of a to-be-pulled-drawn pipe blank, 2, mounting of a pulling and drawing external mold and the to-be-pulled-drawn pipe blank, 3, mounting of the lubricating device and the pulling and drawing core head, and 4, lubricating and pulling-drawing of the to-be-pulled-drawn pipe blank. According to the pipe pulling and drawing lubricating device, the purpose that the lubricating oil is continuously injected into the pipe blank can be achieved, the phenomena that adding of the lubricating oil is uneven, and the local lubricating oil of the inner wall of a pipe is absent cannot occur, and the quality of the inner surface of the pipe after being pulled and drawn is improved.

The invention relates to a squeezing needle used for producing a lubrication-free heat squeezing seamless pipe material, and relates to the squeezing needle used for producing the heat squeezing seamless pipe material. According to the invention, the problem that oil mark on the surface of the pipe material caused by uneven coating of lubricating oil when the squeezing needle is used can be solved, and the problem that metal is easy to adhere on the surface of the squeezing needle so that the scratch is generated on the interior surface of the pipe material can be solved. The squeezing needle used for producing the lubrication-free heat squeezing seamless pipe material comprises a needle core (1), a cemented carbide coat (2) and a screw (3), the needle core (1) is arranged in the cemented carbide coat (2), the lower end of the needle core (1) is parallel with the lower end of the cemented carbide coat (2), the needle core (1) is sealed in the cemented carbide coat (2) through the screw (3). The squeezing needle is used for producing the lubrication-free heat squeezing seamless pipe material.

The invention discloses a method for preparing welded stainless steel pipes for boilers, which belongs to the technical field of welded stainless steel pipe manufacturing. The key points of the technical solution include steel strip unwinding, forming, welding, inner bead leveling, outer bead grinding, and heat treatment , Shaping and cutting, wherein the above-mentioned processes are carried out continuously in sequence, and the heat treatment adopts a brilliant heat treatment furnace. The welded stainless steel pipe processed by the method of the invention has the advantages of stable quality, low manufacturing cost and good surface quality, and is used for manufacturing pipes for boiler heat exchangers and condensers.

The invention provides a vertical composite winding process for an oversized spray pipe expansion section prepreg tape, which comprises the following steps of: placing an expansion section core mold on a rotary track, rotating the expansion section core mold under the driving of a rotary driving mechanism, winding an ablation layer and a heat insulation layer by using a vertical tape winding mechanism, and then performing vacuum packaging and curing to obtain the oversized spray pipe expansion section prepreg tape. Laying the carbon fiber structure layer, performing vacuum packaging and curing, and finally demolding to form a product. According to the invention, the vertical winding forming of the prepreg tape at the expansion section of the oversized composite material spray pipe with the outlet diameter of phi 3.5 m-phi 4 m can be realized, and the problem of looseness of the heavier prepreg tape caused by traditional long-period horizontal winding is avoided; the vertical rotary curing of the expansion section of the oversized composite material spray pipe can be realized, the uniform heating of a product is ensured, the reaction rate of each part is consistent, and meanwhile, the problem that a prepreg tape slides towards the small-diameter end of a core mold due to the softening of resin in the curing and heating stage of the product is solved.

The invention discloses a reverse sealing process of a seamless gas cylinder, and relates to the technical field of gas storage cylinder closing process; the invention comprises the following steps: A, rotary wheel design; B, ferrule design; C, clamping workpiece; D , the adjustment of the workpiece; E, the preheating of the workpiece; F, the closure of the workpiece; The feature of thickening, combined with the advantages of smooth and smooth inner and outer surfaces of the positive closing, greatly improves the production efficiency and product quality, and realizes a technological breakthrough.

A starting material to be extruded made of a high alloy comprising, in mass %, Cr: 20 to 30% and Ni: more than 22% and 60% or less is heated to a temperature predetermined according to the contents of Mo and W and is subjected to a hot-extrusion process, the heating temperature T (° C.) satisfying a relationship of Formula (1), (2), or (3), which is expressed in terms of the average cross-sectional area A (mm2) of the starting material to be extruded, the extrusion ratio EL (−), and the extrusion speed V (mm / s). As a result, a high-alloy seamless tube can be produced without generating cracking and / or seam flaws.When 0%≦Mo+0.5W<4%: T≦1343−0.001322×A−1.059×EL−0.129×V  (1)When 4%≦Mo+0.5W<7%: T≦1316−0.001322×A−1.059×EL−0.129×V  (2)When 7%≦Mo+0.5W: T≦1289−0.001322×A−1.059×EL−0.129×V  (3)

The process of treating medical implanted stainless steel pipe in high inner surface quality includes soaking medical implanted stainless steel pipe in mixed treating fluid comprising stainless steel pickling solution and nanometer alumina particle inside a treating trough, heating the treating fluid to 50-100 deg.c, pressing the treating fluid into the pipe and circulating with a water pump, treating for 0.5-60 min, and flushing the taken out pipe with flowing water. Compared with available technology, the present invention has the advantages of high polishing effect, excellent anticorrosive performance, wide application range and other features.

The self-lubricating shaft sleeve chamfering device comprises a rack and a tool rest movably connected to the rack, and a cleaning part is arranged on the tool rest; the cleaning part comprises a protection cleaning head, the protection cleaning head is in sliding connection with the tool rest through a moving shaft, the sliding direction of the protection cleaning head is the same as the sliding direction of the tool rest on the rack, and a mounting base is arranged at the end, away from the tool rest, of the moving shaft; the protective cleaning head is arranged, when chamfering cutting is carried out, the protective cleaning head can protect the inner surface of a shaft sleeve from being scratched by cutting chips and preventing copper powder from being embedded, the quality of the inner surface of a product is improved, the machining procedure of manual cleaning is reduced, and the labor cost is reduced; the production efficiency is improved.

Provided is a flexible opposite roller spinning alternating current servo direct drive structure. Horizontal synchronous feed movement of internal spinning rollers and external spinning rollers is achieved respectively by utilizing a servo motor to drive screw rods, the internal spinning rollers and the external spinning rollers perform longitudinal movement by electric cylinder driving, and the whole processing process is finished under the control of a servo system. Horizontal synchronous feed of the internal spinning rollers, horizontal synchronous feed of the external spinning rollers and longitudinal asynchronous feed of the spinning rollers can be achieved in the opposite roller spinning process, complex workpiece processing can be finished, workpiece positions can be controlled in real time in a mode of adopting the servo motor to drive the screw rods and an electric cylinder driving mode, and the flexible opposite roller spinning alternating current servo direct drive structure is convenient to operate and large in applied range and overcomes the shortcoming that opposite roller spinning position adjustment is invariable.

The process of treating medical implanted stainless steel pipe in high inner surface quality includes soaking medical implanted stainless steel pipe in mixed treating fluid comprising stainless steel pickling solution and nanometer alumina particle inside a treating trough, heating the treating fluid to 50-100 deg.c, pressing the treating fluid into the pipe and circulating with a water pump, treating for 0.5-60 min, and flushing the taken out pipe with flowing water. Compared with available technology, the present invention has the advantages of high polishing effect, excellent anticorrosive performance, wide application range and other features.

The invention discloses a method for treating inner pit defects inside a continuous rolling carbon steel tube or a low-alloy steel tube. The method comprises the following steps: pickling by using an acid liquid which is prepared from the following components in parts by volume for the first time: 10-15 parts of 33% technical hydrochloric acid, 1-3 parts of nitric acid and 20 parts of water, subsequently performing grinding wheel polishing on the continuous rolling carbon steel tube with inner pit defects or inner pit areas of the low-alloy steel tube, and further pickling for a second time by using another acid liquid which is prepared from the following components in parts by volume: 10-15 parts of 33% technical hydrochloric acid and 20 parts of water, wherein the concentration of FeCl2 in the acid liquids for pickling is controlled to be 35-75g / L each time. By adopting the method of twice pickling and once grinding wheel polishing, the inner pit defects distributed in the inner surfaces of the continuous rolling carbon steel tube and the low-alloy steel tube are eliminated, the quality of the inner surfaces of cold-drawn steel tubes is improved, and the purpose of completely eliminating oxidized iron skin on inner surfaces of steel tubes is achieved.

The invention discloses a molybdenum crucible double-wheel staggered thermal state powerful spinning forming device, which includes a setting system, two sets of spinning forming systems and two sets of automatic online heating systems; the two sets of spinning forming systems are distributed in axial staggered distances On both sides of the shaping system, two sets of automatic online heating systems are respectively distributed on both sides of the shaping system; the shaping system is used for shaping the molybdenum plate, the spinning forming system is used The molybdenum sheet is heated during press forming. The device can use the molybdenum plate as the raw material to produce molybdenum metal rotary products with large length-to-diameter ratio, variable cross-section and curved generatrix at one time without interruption. The molybdenum crucible prepared by the spinning forming method of the device has uniform circumferential wall thickness, uniform wall thickness thinning transition in the height direction, accurate size, no cracks, and no surface defects.

The invention provides surface processing equipment. The surface processing equipment comprises a cantilever, a tool rest and a drive mechanism, wherein the cantilever is of a cuboid shape with a hollow inner cavity and is provided with a first end capable of extending into a deep cavity and a second end opposite to the first end; the tool rest is rotatably mounted at the first end through a mounting shaft and used for mounting a tool; the drive mechanism is fixedly connected with the second end to support the cantilever and is used for driving the tool rest to rotate. Compared with the prior art, the surface processing equipment has the advantages that the cantilever which can extend into a deep cavity is arranged between the drive mechanism and the tool rest, so that the processing equipment can directly process the inner surface of the deep cavity; a work piece to be processed need not be segmented, a connecting process is avoided, simple processing process is achieved, and the processed inner surface is high in quality; the cantilever is of the cuboid shape with the hollow inner cavity, so that the stability of the cantilever is enhanced, the cantilever is less prone to shaking during the inner surface processing of the deep cavity, and the inner surface processing quality can be further improved.

The invention discloses a pipe pulling and drawing lubricating device, and further discloses a pipe pulling and drawing machining method. The pipe pulling and drawing lubricating device comprises an oil supplying mechanism arranged on a chain broaching machine and a lubricating pipe connected with the oil supplying mechanism. The oil supplying mechanism comprises an oil box for storing lubricatingoil, an oil injecting pipe connected with the lubricating pipe and an oil injecting pump connected to the position between the oil box and the oil injecting pipe. The lubricating pipe is composed ofa flat and straight steel pipe, a sealing plate arranged at one end of the flat and straight steel pipe and a connecting rod mounted on the end face of the sealing plate and used for being connected with a pulling and drawing core head. The flat and straight steel pipe is composed of an oil injecting section, a clamping section and a connecting section. The pipe pulling and drawing machining method comprises the steps of 1, preparation of a to-be-pulled-drawn pipe blank, 2, mounting of a pulling and drawing external mold and the to-be-pulled-drawn pipe blank, 3, mounting of the lubricating device and the pulling and drawing core head, and 4, lubricating and pulling-drawing of the to-be-pulled-drawn pipe blank. According to the pipe pulling and drawing lubricating device, the purpose that the lubricating oil is continuously injected into the pipe blank can be achieved, the phenomena that adding of the lubricating oil is uneven, and the local lubricating oil of the inner wall of a pipe is absent cannot occur, and the quality of the inner surface of the pipe after being pulled and drawn is improved.

A process for producing seamless pipes which comprises conducting a piercing rolling step, a elongating rolling step using a mandrel bar, and a sizing rolling step and subsequently conducting a product heat treatment. In the process, when the carbon-equivalent weight, namely the sum of the weight of graphite in the lubricant and the carbon content in the organic binder, per unit area of the lubricant adhering to the mandrel bar surface in the above-mentioned step of elongating rolling is expressed by C (g / m2) or the maximum extent of carburization in the inner surface of the pipe to be heat-treated but prior to the heat treatment is expressed by ΔC (% by mass), the heating temperature for the pipe to be heat-treated is expressed by T (° C.), and the time during which a decarburizing gas is blown into the inside of the pipe to be heat-treated is expressed by t1 or t2 (seconds), and further, the blowing time calculated taking into account the wall thickness reduction in the step of cold working is expressed by t3 or t4 (seconds), a predetermined relation is satisfied and the actual decarburizing gas blowing time in the heat treatment is longer than the time t1, t2, t3 or t4 (seconds), whereby seamless stainless steel pipes reduced in carburized layer formation can be produced even when the carbon adhesion to the pipe inner surface is caused in, for example, mandrel mill rolling.

The invention discloses a heating method of a hollow ingot. The heating method comprises the following steps that (1) a graphite rod is placed in the hollow ingot, wherein the length of the graphite rod is the same as that of the hollow ingot, and the diameter of the graphite rod is 2mm-8mm smaller than the inner diameter of the hollow ingot; (2) the hollow ingot with the graphite rod is placed ina copper ingot heating furnace to be heated; and (3) after the hollow ingot with the graphite rod reaches the process temperature, the hollow ingot is pushed out of the copper ingot heating furnace and conveyed to an extruder, and the hollow ingot is extruded after the graphite rod in the hollow ingot is taken out. The heating method of the hollow ingot effectively solves the problem of oxidationof the inner surface of the hollow ingot in the heating process, so that the pipe yield is greatly increased; the method is simple, convenient to operate, good in using effect and capable of reducingmetal loss; and according to the heating method of the hollow ingot, the one-time yield of pipes is greatly improved, and obvious economic benefits can be obtained.

The invention relates to an omnidirectional multi-functional disk type elongating mill, the diameters of an upper and a lower guide disk are increased; the lifting of the upper guide disk adopts a turbine, a worm and a leading screw device; the lifting of the lower guide disk adopts a standard spiral elevator; and the axial direction adjustment is realized by the standard spiral elevator; the positive direction location, lateral direction location and upper and lower direction location are realized by a hydraulic cylinder. The axial direction adjustment of the roller is realized by the standard spiral elevator; the radial direction is adjusted by the combination of a non-standard spiral elevator and the hydraulic cylinder; the locking device adopts the hydraulic cylinder and an adjusting wedge mechanism. Guide bushes of an outlet and an inlet port adopt the upper-pressing and lower-locking of the hydraulic cylinder. The reliability is increased by adopting the hydraulic system; the enlarged diameters of guide disks can improve the locking condition of the roller, the elongation coefficient is increased, screw threads in the steel tube are reduced after rolling, and the variety of products is enlarged; gaps of the axial direction and radial direction of the guide disks and the roller are reduced, and the stability of the rolling is strengthened; the structure of the side pressure oil cylinder of the roller is simple, and the running is reliable; the guide bushes of the outlet and inlet port adopt the upper-pressing and lower-locking device to realize the double-assurance.