586results about "Broaching machines" patented technology

A pumping station for pumping a cooling and lubricating fluid containing particulate matter such as machining chips has a compact structure with a relatively low total structural height, while still assuring that the chips are conveyed with the fluid to the pump suction inlet, without settling-out or accumulating in the apparatus. The pumping station (1) includes a collecting container (5) with at least one pump (6) arranged therein, a chip breaker (7) and a supply conduit arrangement. The supply conduit arrangement includes a supply line (2) through which the cooling and lubricating fluid containing the machining chips is received from a machining tool or transfer station. Furthermore, two branch lines (3) and (4) are interposed and connected between the supply line (2) and the collecting container (5). A first branch line (3) conveys the fluid, from which the chips have been removed, with a slight downward slope toward the collecting container (5). The second branch line (4) conveys the chips that have been removed from the fluid flow. A scraper conveyor or the like conveys the chips upward through the second branch line (4), and the outlet end of the branch line (4) is arranged directly above the chip breaker (7), which in turn is arranged above the outlet end of the fluid conveying branch line (3). The comminuted chips thus fall from the breaker (7) directly into the flow of fluid, in which the chips are then entrained and carried along into the sump (13) of the collecting container (5), where the chips and fluid are sucked and pumped away by the pump (6).

The present invention discloses one kind of inner helical surface machining apparatus and process. The machining apparatus includes one milling machine and one broaching machine. The milling machine for rough machining includes one machine body, one cutter bar with cutter and driving shaft connected to the cutter, one first driving mechanism connected to the driving shaft, one turbine with one through hole for the workpiece to penetrate through coaxially with the cutter bar and one second driving mechanism connected to the turbine. The broaching machine is for the finish machining of the inner helical surface. The present invention has high inner helical surface machining precision, and high machining efficiency.

The broach assembly includes alternate spacers and cutters arranged in a sub-assembly having a lead at a leading end and a lag at a trailing end. The cutters have side margins in excess of the margins of the spacers for cutting material from the dovetail slots of the turbine wheel as the broach assembly passes through the slots. The bottom or apices of each spacer and cutter are tapered to form a continuously tapered surface along the bottom of the broach assembly. Upon passing the broach assembly through the slot, the assembly is progressively displaced in a radial outward direction to progressively cut the active dovetail slot surfaces. Shims may be disposed in the bottom of the slot to further displace the broach assembly radially outwardly in multiple passes.

A portable, mechanically operated, key-duplicating machine that relies on a punch-cutting system that selectively punches out the particular notches or “bittings” of a key blank in response to the details of an adjacent and aligned master key. The duplicating machine comprises a frame having cutting end and an alignment end. The frame defines a longitudinal axis. A carriage is movable along the longitudinal axis and includes a transverse axis. A key clamping assembly has a first key clamp for holding the key blank and a second key clamp for holding the master key. The key assembly is selectively slidable along the transverse axis. A cutting assembly is located at the cutting end and includes a punch-type cutter pin that is adapted to selectively cut pre-shaped notches from the held key blank. The cutter pin includes a guide section that aligns with the notch-profile of the held master key. The key clamping assembly is rotatable about the transverse axis and with respect to the carriage so that the mounted keys face either the cutting end or the alignment end of the frame.

A faceted bone screw and a method for manufacturing the same includes a screw thread configuration having facets that are substantially transverse to the thread. The facets are generally made up of a plurality of transitioning peaks and valleys which vary the depth of the thread and are disposed in one or more locations throughout the threaded portion of the bone screw. The facets operate to reduce the torque required to drive the bone screw into bone, while at the same time operate to assist in anchoring the bone screw within the bone once inserted therein, and thereby reduce the possibility for the screw backing out after insertion.

The invention discloses an inner-cone spline broaching machine tool, which comprises a base, a broaching tool, a sliding plate, a cutter relieving cylinder assembly, a working device and a driving device. The base is arranged on a machine tool body and is provided with a guiding seat thereon; one end of the broaching tool extends into the machine tool body, and the broaching tool is connected with a stretching cylinder in the machine tool body and can be vertically and slidably arranged on the guiding seat; the sliding plate is sleeved on the guiding seat and is slidably arranged on the base;the cutter relieving cylinder assembly is arranged on the base, and an extending end of the cutter relieving cylinder assembly is connected with the sliding plate; the working device is arranged on the sliding plate and is used for fixing inner-cone splines; and the driving device is arranged on the sliding plate and is used for driving the working device to rotate one indexing unit each time. According to the inner-cone spline broaching machine tool disclosed by the invention, the inner-cone splines are machined by a broaching tool in a broaching manner, the precision by adopting the broaching tool is higher than the precision by adopting gear planning, and the efficiency by adopting the broaching tool is higher the efficiency by adopting the gear shaping and the gear planning; the working device carries out operations, such as automatic indexing, automatic broaching tool feeding, retracting and the like, by the driving device, thus the indexing operation is uniform and reliable, andthe degree of automation is high; and the inner-cone spline broaching machine tool disclosed by the invention is convenient to be detached, and can carry out multiple specifications of inner-cone spline operations by replacing the working device.

The invention discloses a method for machining tongues and grooves of turbine discs. The method includes steps of 1), forming section grooves in turbine disc blanks along reference lines of tooth crests of tongue teeth in rough broaching stroke; 2), cutting preset tongue tooth groove locations on the side walls of the section grooves to form tongue tooth rough grooves in semi-finish broaching stroke; 3), continuing to carry out cutting on the basis of the tongue tooth rough grooves to obtain tongue tooth grooves. The method for machining the tongues and grooves of the turbine discs has the advantages that the semi-finish broaching stroke is added between the rough broaching stroke and the finish broaching stroke, the partial tongue tooth rough grooves in allowance stroke can be removed bythe aid of the semi-finish broaching stroke, then the remaining tongue tooth grooves in the allowance stroke can be removed by the aid of the finish broaching stroke, finish broaching tools and semi-finish broaching tools are jointly responsible for tongue tooth groove allowance cutting, accordingly, allowance required to be cut by the various broaching tools can be reduced, broaching force in broaching procedures can be reduced, tool damage phenomena can be prevented, and the purposes of protecting the broaching tools, prolonging the service lives of the broaching tools and improving the component machining quality can be achieved.

The invention discloses a broaching method and a special tool for high-accuracy small-sized mortises. A special broaching tool is used for machining a to-be-machined workpiece. The structure of the special broaching tool meets the requirement that straight chamfers or/and round chamfers capable of participating in broaching are arranged on tooth crests of the broaching tool. The broaching method for the high-accuracy small-sized mortise meets the requirements that a broaching machining allowance elimination mode comprises the step of machining the workpiece by using main blades on the tooth crests of the broaching tools or/and the chamfer parts of the broaching tools, and the chamfer parts of the broaching tool are the straight chamfers or/and the round chamfers on the two sides of blades on the tooth crests; and totally 11 broaching tools are formed into a complete set, and are sequentially used for machining all the contour shapes of the mortises. The method and the special tool are mainly applied to the broaching machining of mortises of core parts of aero-engines and gas turbines such as turbine disks and air compressor disks, can be popularized and used for like parts, and have broad application prospect in a series of new-generation aero-engines and gas turbines, and a technical bottleneck in the broaching of specially-structured high-accuracy small-sized mortises is solved.

The invention relates to a wheel bearing assembly for motor vehicles with a bearing provided with an inner ring and an outer ring, the bearing being fitted with its outer ring into a bearing casing and the outer ring being mechanically supported in axial direction on a first side by a supporting surface provided on the bearing casing. Discrete and preferably evenly arranged stop protrusions are formed on the inner circumference of the bearing casing, the outer ring abutting thereon in axial direction on its second side, and the stop protrusions being formed by locally plastic forming the bearing casing.

The invention relates to a numerical control machine for contour broach of an internal screw of a constant-wall-thickness stator and a use method. In a technical scheme, the numerical control machine mainly comprises a machine body, a push-and-pull system, a rotating system, a cutter system, a hydraulic system, an electrical control cabinet and a control system, wherein the cutter system mainly comprises a cutter blade, a cutter body and a cutter bar, the cutter body is provided with a cuttings accommodating slot for accommodating cuttings produced by the cutter, a clamping slot for the cutter blade is arranged at the front part of the cuttings accommodating slot and is used for installing and adjusting the cutter blade, and a metal hair brush is arranged on the cutter body and rotates along with the cutter bar to clean away cuttings; and the cutter body is connected with the cutter bar and is hollow, and cooling fluid can be transferred through the hollow portion during machining. Inthe invention, the mature deep hole machining technology and equipment are used as a platform, the gun barrel rifling and broaching equipment and process technology are combined, the machining mannerof workpiece fixation as well as cutter rotation and feeding is adopted, and a special numerical control contour broach machine is designed and manufactured.

The invention relates to a hard broaching finish machining process for a surface of an internal keyway. The internal keyway of a part is sleeved at one end of a cutter which is same with the internal keyway in shape to fix both ends of the cutter so that the part moves along the cutter axially at a speed of 4-10m/s. During movement, deviation of the center of the internal keyway in the part and the axis of the cutter is maintained smaller than or equal to 0.01mm. The cutter is of a sectionally differential stepped structure. The blade hardness is greater than or equal to HRC67. The invention further provides a hard broaching finish machining device for the surface of the internal keyway. Both ends of the cutter are respectively fixed on an upper tool apron and a lower tool apron which are located above and below a work table and installed coaxially. A work table drive device drives the work table to move along a guide rail on a machine tool body to realize high speed machining of an internal spline of a workpiece to be machined. The hard broaching finish machining process for the surface of the internal keyway and the device provided by the invention are simple in process method and reasonable in structure of the device, and has high machining precision and efficiency for internal keyways, and low cost and energy consumption, and industrialized production can be realized in a large scale.

A method for machining a workpiece in which a machine tool comprising a first and a second chuck devices is employed to machine the workpiece, the machine tool being used in which the first and the second chuck devices comprise a chuck main body, plural chuck jaws, a chuck jaw drive body, and a pressing member, the method comprising: machining a clamp part of the other end part of the workpiece in a state where one end part of the workpiece is clamped by the first chuck device; machining a clamp part of the one end part of the workpiece in a state where the clamp part of the other end part of the workpiece is clamped by the second chuck device; and executing desired machining on the workpiece in a state where each of the clamp parts are clamped by each of the chuck devices.