66 results about "Broaching" patented technology

The invention discloses a multi-mode flexible four-corner welding machine and method for improving the weld fillet strength, and belongs to the technical field of profile manufacturing. The welding machine comprises a machine body, a cross beam of the machine body is adjustable along an X axis, machine heads on the cross beam slide along a Y axis, and four groups of machine heads clamp four corners of a profile. The machine head integrates a pressing assembly, a heating assembly, a broaching assembly, a seam pressing assembly and the like, the pressing assembly achieves profile fixing and position adjusting through a plurality of guide rail pairs, the broaching assembly carries out precise broaching on a welding seam, and the seam pressing assembly prevents molten chips from overflowing and carries out surface molding on the profile. The method comprises the steps of debugging, charging, positioning and limiting, heating, welding seam width adjustment, welding and discharging. Welding and welding seam finishing are integrated, and the secondary machining defect is avoided; multiple groups of adjustable mechanisms and detachable accessories are matched with various profiles; the surface of the color profile can be protected, the welding quality is enhanced, and the flexible manufacturing capacity of a production line is improved.

The utility model discloses a broach with a special tooth embedded blade, which solves the problems that the service life of the existing broach is short due to the fact that the special tooth is easy to abrade in the broaching process to cause meat falling and strain at an outlet, and the existing broach is lack of special structural design in the radial direction and is not capable of improving the performance of individual teeth. The cutter comprises a cylindrical cutter body, a cutter strip groove is formed in the outer wall of the cutter body in the direction parallel to the central axis, a cutter strip is arranged in the cutter strip groove and connected to the cutter body through a bolt, and a plurality of special key grooves are formed in the cutter strip at equal intervals to form special teeth. The cutter further comprises a plurality of rows of spline cutting teeth, each row of spline cutting teeth is arranged on the outer wall of the cutter body, and the two ends of each row of spline cutting teeth are located on the two sides of the corresponding cutter strip groove respectively. A plurality of splines are arranged on each row of spline cutting teeth at equal intervals to form the spline cutting teeth; the broach is an assembly type broach, the blade can be replaced according to the actual use condition, and the economic cost is reduced.

The invention discloses a method and a device for automatically regulating and controlling the drilling length of a gas extraction directional long drilling hole, and belongs to the technical field of mine gas control. The method comprises the following steps that the position of a directional long drill hole is determined, and drilling construction is conducted; broaching is conducted at some positions of directional long drilling construction, and broaching sections are formed; laying a gas extraction pipe, and arranging a drilling length automatic regulation and control device at the reaming section; and when it is monitored that the gas concentration and the pure amount reach preset starting values, the drill hole is automatically blocked, and automatic regulation and control over the length of the drill hole are achieved. According to the method for automatically regulating and controlling the length of the drill hole, automatic regulation of the length of the drill hole is achieved according to parameters such as gas concentration and purity in the gas extraction pipe in cooperation with the bag capable of being automatically opened in the directional long drill hole, and the site construction burden is relieved; meanwhile, bidirectional plugging can be carried out from the inside and the outside of the extraction pipe, the length of the drill hole is effectively reduced, the gas extraction efficiency is improved, and the service life of the directional long drill hole is prolonged.

The present application relates to the gradual formation and the same profile combination tenon and slot cutter blade shape space curve parameterization design method, including the following steps: step one, shooting tenon and slot image; Step two, tenon and slot shape curve is discrete; Step three, calculate control point and fit approximation curve; Step four, the same profile cutter tooth space curve design: step five, gradual formation type cutter tooth space curve design; Step six, tenon and slot broach cutter tooth space curve output. The present application reduces the difficulty of tenon and slot broaching cutter space curve parameterization design; The parameterization of the cutter blade space curve realizes the unity of parameter selection, improves the stability of the broach design, and proposes the transition boundary and method of the gradual formation and the same profile combination, solves the problem of difficult to determine the gradual formation and the same profile transition method, reduces the design difficulty; At the same time, the parameterization design solves the long cycle and low efficiency problem of the traditional design method, improves the design efficiency of the broach, and reduces the cost of broach design and manufacturing.

This invention relates to a teardrop-shaped chip divider for precision broaching of tenon grooves in aero-engines, belonging to the field of aero-engine manufacturing technology. The chip divider features a smooth contour composed of arcs and straight lines within a specific range, and is tangentially connected to the back face of the cutting teeth. This results in a large, smooth, streamlined cross-section without sharp points, effectively solving the industry problem of sharp-cornered chip dividers scratching the machined surface of the workpiece during precision broaching. While ensuring chip breaking and chip separation functions, it significantly improves the surface roughness quality of the tenon groove. It is suitable for precision broaching of high-requirement parts such as compressor discs and fan discs, improving blade machining efficiency.

The utility model discloses a split type chambering auxiliary tool for a drill bit, which belongs to the technical field of drill bits, and comprises a connecting pipe, a connecting assembly, a chambering assembly, a gasket, a scale assembly, a clamp spring and a jackscrew, the connecting pipe comprises a pipe body, one side of the pipe body is connected with a connecting rod, a clamp spring groove is arranged outside the pipe body, a first thread groove is arranged in the pipe body, and a second thread groove is arranged in the pipe body. An inner threaded hole is formed in the pipe body, and the jackscrew is connected into the inner threaded hole in a threaded mode. According to the tool, the pipe body and the reamer bit can be assembled and connected through the threaded rod to form a split combined structure which is not prone to falling off, when the tool needs to be connected with external drill bits of different sizes, only the reamer bits matched with the different sizes need to be replaced, the adaptability of the tool is improved, the reamer bit is convenient to replace, and operation is convenient. And when the broaching part of the tool is damaged, the tool can be continuously used only by replacing the broaching drill bit, so that the use cost of the tool is reduced.

This application provides a compact high-speed narrow right-angle milling head with automatic broaching and internal cooling functions. It includes a milling head body, a splined shaft, and a narrow right-angle milling head spindle, and further includes a transmission mechanism disposed between the splined shaft and the narrow right-angle milling head spindle. The transmission mechanism includes a first bevel gear, a second bevel gear, and a multi-stage spur gear set that mesh sequentially. The first bevel gear is coaxially fixed to the splined shaft, and a driven gear is coaxially fixed to the narrow right-angle milling head spindle. The multi-stage spur gear set is used to achieve the transmission connection between the second bevel gear and the driven gear. An automatic broaching mechanism is provided on the narrow right-angle milling head spindle. The automatic broaching mechanism includes a first broaching assembly and a second broach release assembly arranged in parallel. The first broaching assembly is disposed inside the narrow right-angle milling head spindle, and the second broach release assembly is fixed to the bottom of the milling head body. This application can be disassembled into two structures: one with internal cooling and one without internal cooling, and successfully integrates an automatic broaching and release mechanism under extremely narrow space constraints.

The present application relates to broaching technology field, specifically disclose a large turbine disk mortise broaching machine main transmission device, including the casing, the top of the casing is hinged with machine cover, the surface of the machine cover is provided with a notch, the both sides of the casing are provided with a strip-shaped mouth, the inner bottom wall of the casing is fixedly installed with the coaming, the inner side of the coaming is fixedly installed with the shell, the large turbine disk mortise broaching machine main transmission device, the displacement driving motor drives the rotation of the lead screw, the lead screw drives two lead screw sleeves to be synchronized to approach, the rack assembly, the driving assembly and the cleaning assembly will be folded by sliding sleeve on the slide bar, until the toothless end of the broach side surface is attached to the outside of the turbine disk, then the main transmission motor drives the driving helical gear to rotate, the driving helical gear drives the rack shell, the slide bar and the broach to slide in the guide rail shell, the side surface of the broach contacts the outside of the turbine disk to realize the broaching, so as to conveniently cut the purpose of the outer surface of the turbine disk.

The application discloses a super-long internal broach for long-ratio inner hole profile broaching, which comprises a broach bar, a broach disc, a broach handle and a broach holder. The broach disc is detachably arranged on the broach handle. One end of the broach holder is detachably arranged on the broach handle and is positioned and connected with the broach disc. The other end of the broach holder is detachably connected with one end of the broach bar. The other side of the broach bar is detachably arranged on a machine tool. The application solves the problems of single broach manufacturing difficulty, multi-broach tool changing inconvenience, high manufacturing cost and high labor intensity when the conventional internal broach is used to broach a large aperture and a long-ratio hole with a ratio greater than 5 times. When the aperture is greater than 100 mm and the long-ratio is greater than 25 times, the application solves the bottleneck problem of being unable to manufacture. The broaching part and the non-broaching part are separated. The working part and the non-working part are clamped and loosened by hydraulic pressure. There is no pipeline winding, and the disassembly and assembly are convenient, and the labor intensity of workers is low.

The present application relates to the turbine disc and compressor disc processing and manufacturing technical field of aero-engine, gas turbine, etc., and discloses a wheel disc mortise broaching force regulation and control method and system, the method comprises the following steps: obtaining broach geometric parameters, broaching process parameters and workpiece material physical properties; based on the broach geometric parameters, the broaching process parameters and the workpiece material physical properties, the shear flow stress on the main shear surface in the cutting process is calculated, and the cutting force considering the strain softening and temperature-strain rate coupling effect is further calculated; based on the broach geometric parameters and the shear flow stress, the edge extrusion force caused by the broach edge roundness radius is calculated; the broaching force and the edge extrusion force are superimposed to obtain the wheel disc mortise broaching force; according to the wheel disc mortise broaching force, the broach geometric parameters and the broaching process parameters are adjusted and controlled, and then the wheel disc mortise broaching force is optimized to meet the actual processing requirements, which provides support for reducing the tool optimization design cost and improving the wheel disc processing quality.

The invention discloses a profiling vibration polishing method and device for an aero-engine tenon connection structure, and belongs to the technical field of precision machining. The device comprises a driving and vibrating system, a profiling polishing execution system, a precise force control system and a polishing solution circulating system. The core of the method is that a profiling polishing tool matched with the tenon structure profile in a negative shape is adopted, and a flexible polishing pad is attached to the surface; constant pressure is applied to the tool through a precise force control system; meanwhile, the driving system drives the tool to perform high-frequency micro-amplitude linear reciprocating vibration; under the participation of free abrasive particles in the polishing solution, uniform, low-damage and high-efficiency polishing of the tenon tooth / mortise complex curved surface is realized. The problems of thermal damage, large residual stress, limited surface quality and the like caused by a traditional grinding / broaching process are effectively solved, the surface integrity and fatigue performance of the tenon structure can be remarkably improved, the process flexibility is good, and the method is suitable for nickel-based high-temperature alloy and other materials difficult to machine.

The application discloses a kind of cutting performance prediction methods of flocking broach.The method includes the following steps: one, the effective contact length of the tested broach in cutting process is obtained.Two, the transduction coefficient for evaluating the heat dissipation capacity of the tested broach is obtained.Three, the broaching performance of the tested broach is judged.The application considers the various parameters of broach rake face flocking and the factor parameters of lubricating fluid, constructs the temperature field mathematical model of flocking broach, and realizes the accurate evaluation of temperature field in the cutting process of flocking broach through transduction coefficient.The application can accurately obtain the effective contact length and transduction coefficient of flocking broach by constructing two mathematical models, and evaluate the cutting performance of flocking broach and provide corresponding optimization scheme for flocking broach.The broaching tool designed for the size of horizontal broaching machine integrated broach realizes the effects of optimizing and reforming traditional broach, convenient disassembly and assembly and replacing single-tooth broach.

This utility model relates to metal-cutting tools for broaching cylindrical holes. The technical result consists of increased machining productivity, reduced broaching force, vibration, and specific pressure on the teeth, increased tool life and hole machining quality, and expanded broach manufacturing capabilities. The two-stage progressive broach has a front shank, a neck, a transition cone, a front guide, a two-stage cutting section, a calibrating section, a rear guide, and a rear shank. The first-stage cutting teeth have splined straight-sided cutting lugs and chip-separating grooves on each cutting lug; the second-stage teeth have staggered chip-separating grooves on each tooth. In the calibrating section, two pre-calibrating teeth are made in front of the round calibrating teeth, and the transition section between the steps is made enlarged.

The present application aims at providing a gas turbine compressor wheel disk mortise broaching device, belonging to the field of gas turbine processing, comprising a base, a main positioning shaft, a pressing rod, a gland, and a dismounting frame; the base is provided with an inner hole; the main positioning shaft is fixed on the upper end face of the base; the lower part of the pressing rod is provided with a boss; the bottom of the pressing rod extends into the inner hole of the base; the boss is pressed on the upper end face of the base and located in the main positioning shaft; the part of the pressing rod above the boss is sleeved with the dismounting frame; the wheel disk is placed on the base and sleeved outside the main positioning shaft and the dismounting frame; the position where the bottom of the wheel disk cooperates with the base is provided with an anti-rotation key; the bottom of the wheel disk is provided with a positioning groove; the positioning groove cooperates with the anti-rotation key in clearance; the lower end of the gland is installed at the end face of the wheel disk; and the top of the pressing rod extends out of the gland. After the compressor wheel disk mortise is broached by the present application, the wheel disk deformation is reduced, the processing precision and efficiency are improved.

A broaching device (1) comprising: - a clevis (2) comprising two opposing plates (21, 22), each having a through-hole (213, 223) and defining a slot (23); - two support elements (3, 4) fixed to the outer faces (212, 222) of the two plates around their through-holes; and - a broaching rod (5) having two opposing ends (51, 52), and shaped to pass through the through-holes and the two support elements; the broaching device being configurable in: - two standby configurations in which one of the two ends of the broaching rod is locked onto one of the two support elements, without the rod being engaged in the slot; and - an assembly configuration in which the broaching rod is engaged in the slot and is locked onto the two support elements. (See abstract figure: Figure 2)

The utility model discloses a horizontal broaching machine relates to industrial parts processing equipment field, including device main part, device main part is provided with a plurality of guide blocks, and the inside bottom cooperation guide block of device main part is provided with a plurality of mounting blocks, and the mounting block is opened with the installation slot of cooperation guide block, and the mounting block is opened with the aperture, and the outside one end cooperation aperture of device main part is provided with the guide, and the device main part cooperation guide is provided with the connecting rod, and the connecting rod extends to the device main body, and the guide is opened with the first connecting port, and the first connecting port is opened with the guide and the connecting rod and the device main body in connection in the penetration, the utility model discloses the movement of card block is driven by the conveyer belt, and then automatically drives the movement of the pull strip to complete the loading and unloading, and does not need manual plugging. This not only greatly improves the working efficiency of broaching machine, but also reduces the mistake caused by manual operation, speeds up the production progress, and guarantees the efficient and stable operation of production process.

The utility model discloses a broaching device for mould processing, which comprises a base, a longitudinal moving component and a portal frame are respectively arranged on the base, the longitudinal moving component is positioned on the inner side of the portal frame and is perpendicular to the portal frame, a moving platform is arranged on the longitudinal moving component, a clamping and fixing mechanism is arranged on the moving platform, and the clamping and fixing mechanism is arranged on the portal frame. The clamping and fixing mechanism longitudinally moves along with the moving platform; a transverse moving assembly is arranged on the portal frame, and a reaming mechanism is arranged on the transverse moving assembly. By arranging the longitudinal moving assembly, the moving platform, the clamping and fixing mechanism, the transverse moving assembly and the broaching mechanism, automatic broaching operation can be carried out, the servo motor is adopted for driving, rapid moving and accurate positioning are achieved, machining efficiency is improved, manual operation is reduced, and labor intensity is lowered.

The invention relates to the technical field of broaching machines, and discloses a double-lead-screw small broaching machine which comprises a machine tool base, a control cabinet and a machine frame, a broach pushing seat is further installed in the machine frame, the control cabinet and the machine frame are both fixedly installed on the machine tool base, and the interior of the machine frame is composed of a reinforcing structure; a broaching tool clamping set is installed at the bottom of the machine frame, two symmetrically-arranged lead screws are further rotationally installed in the machine frame, broaching bases are movably installed on the lead screws, and the operation track of the broaching bases is from bottom to top. According to the broaching machine, the cutting process is completed by moving the workpiece, and compared with an existing broaching machine moving broaching tool, the operation distance of the broaching machine is greatly shortened (due to the fact that the broaching tool has the length when moving, the length of the broaching tool needs to be added to the moving stroke of the broaching tool), at the moment, the overall height of the broaching machine can be greatly reduced, and therefore the occupied space of the broaching machine is saved.

The application relates to the technical field of hydraulic broaching machines, and discloses a horizontal hydraulic broaching machine for machining plate roller end covers, which comprises a machine tool, a placing pipe, a cutting module and a fixing module are arranged on the machine tool, a driving piece is arranged on the machine tool, a moving strip is arranged on the driving piece, a moving inclined surface is arranged on the moving strip, the distance between the moving inclined surface and the driving piece gradually decreases along the direction from the inner diameter of the placing pipe to the outer diameter of the placing pipe, the driving piece is used for driving the moving inclined surface to abut against the inner diameter of the end cover, a first strip is arranged on the fixing module, a second strip is arranged on the machine tool, and the second strip is located on the moving path of the first strip; when the moving strip abuts against the inner diameter of the end cover and the first strip abuts against the second strip, the inner diameter of the end cover is within a normal range, and the application staff only need to judge whether the first strip abuts against the second strip to judge whether the inner diameter of the end cover is problematic.

The main shaft dust blowing structure comprises an oil cylinder, a shaft core and a pull rod assembly, the shaft core is provided with a shaft core inner hole, the pull rod assembly is arranged in the shaft core inner hole, the oil cylinder comprises a cylinder body, a top cover and a piston, the top cover is installed on the cylinder body, a piston cavity is defined in the cylinder body, the piston is arranged in the piston cavity, and the piston is provided with a sleeve part. The top cover is provided with a central guide column in the sleeve part, a concave cavity is formed in the central guide column, a movable plug is arranged in the concave cavity, the movable plug is provided with an axial through hole, the top cover is provided with an air inlet and liquid inlet hole, the pull rod assembly is provided with a central liquid through hole, the pull rod assembly and the shaft core are provided with a dust blowing air channel, and the dust blowing air channel forms an inlet in the end, in butt joint with the sleeve part, of the pull rod assembly; the dust blowing air channel forms an outlet at the cutter handle connecting end of the shaft core. The dust blowing structure and the central water outlet share the air inlet and liquid inlet hole, the working state of cutter beating and broaching is fully utilized, a dust blowing air path connector is omitted under the condition that other resources are not occupied, and the structure of the electric spindle is more compact.

The utility model discloses a pipeline broaching and shrinking machine for industrial air conditioner production, which belongs to the technical field of air conditioner pipeline processing and comprises a table body, a first cylinder is fixedly mounted at the edge of the upper surface of the table body, the output end of the first cylinder is fixedly connected with a mounting box, and one side of the mounting box is fixedly connected with a second cylinder. A first motor is fixedly mounted on the other side of the mounting box, a belt transmission piece is fixedly connected to the output end of the first motor, and a grinding assembly is fixedly connected to one side of the belt transmission piece; through the arranged grinding assembly, the threaded rod can drive the grinding head to make contact with the inner wall or the outer wall of the pipeline, then the first motor can drive the grinding head to annularly rotate along the pipe wall of the grinding head, so that the pipe wall of the grinding head is ground, burrs at an opening of the pipeline are ground away, the pipeline is ground to be flat, and the influence on the quality of follow-up broaching and shrinkage can be effectively avoided; therefore, size deviation of the hole and scratches or cracks on the inner surface of the hole groove are avoided.

The utility model discloses a kind of for broaching processing's clearance elimination device, including mounting sleeve, the connecting sleeve being set in one side in mounting sleeve and the sliding cover being set in the other side in mounting sleeve and with connecting sleeve movably connected, first flat hole is equipped on the connecting sleeve, second flat hole is equipped in the sliding cover and first flat hole is communicated, position assembly is equipped on the connecting sleeve, and the corresponding position of sliding cover and position assembly abuts and limits position.The utility model sets up connecting sleeve, sliding cover and position assembly, in circumferential direction limit and keep the consistent of broach's play clearance, realize the purpose of eliminating processing gap and effectively controlling processing error.

This invention discloses a combined turning, milling, drilling, boring, honing, and broaching machine tool and its processing technology, comprising a bed, spindle box, mechanical C-type center rest, hydraulic C-type center rest, four-pin centering center rest, tailstock, turning and milling cutter post system, tool post three-axis feed system, oiler, guide bracket, tool feed system, tool holder rotary indexing box, tool head radial feed system, tool holder, etc. This invention integrates turning, milling, drilling, boring, honing, and broaching processes, designing a machine tool that integrates turning, milling, drilling, boring, honing, and broaching processes and procedures. It meets the processing requirements of key processes for long pipes, has a small footprint, high output ratio, and can complete the machining of inner and outer diameters and internal helical lines (rifling) in a single setup, reducing auxiliary time and labor intensity, lowering costs, and offering high efficiency, high precision, energy saving, and environmental protection.

Cutting tool (2) for cutting longitudinal grooves, for example keyways, with a tool shank (6) extending along a longitudinal central axis (4) for clamping in a tool holder driven in the direction of the longitudinal central axis (4) and a cutting head (8) axially extending the tool shank (6), which has two cutting wedges (10) rotationally symmetrical to each other with respect to the longitudinal central axis (4), wherein the tool shank (6), preferably at its end facing away from the cutting head (10), has a rotation-locking section (24) for positively locking rotation-locking clamping in the tool holder, and the cutting wedges (10) can be aligned with each other by rotation about a predetermined angle of rotation, in particular about 180° or 90° with respect to the longitudinal central axis (4), wherein the rotation-locking section (24) provides anti-rotation protection in a first rotational angular position and a second rotational angular position,which is offset by the predetermined rotation angle to the first rotation angle position, wherein the cutting wedges (10) are formed integrally with the cutting head (8), characterized in that the cutting head (8) is formed integrally with the tool shank (6).

The utility model discloses a broaching tool for hydrogen-induced delayed cracking of a hot forming part, which comprises an upper die and a lower die, the upper die comprises an upper die body and a broaching cone, the lower die comprises a lower die body, the lower die body is provided with a mounting hole and a material sheet placing groove, and the material sheet placing groove divides the lower die body into a top plate and a bottom plate; a through hole located under the reaming cone is formed in the center of the bottom plate, a strip-shaped groove, a plurality of outer-ring threaded holes and a plurality of inner-ring threaded holes are formed in the middle of the top plate, and round points of a circular ring formed by the outer-ring threaded holes and the inner-ring threaded holes are all located on the central axis of the through hole. The chambering tool can take out material sheets meeting chambering requirements for hot forming parts with different molded surfaces for chambering experiments, so that the hydrogen-induced delayed cracking risk rate of the parts is judged, the application range is wide, and the requirements of hydrogen-induced delayed cracking chambering experiments of typical hot forming parts such as A columns, B columns and central channels can be met; meanwhile, the tool is simple in design, short in machining time and low in cost.

To provide a bone anchor tip for penetrating a hard or dense bone.SOLUTION: A tip 10 for a bone anchor 12 has cutting edges 16 that converge at the end of the body to form a point 20, thereby defining a series of cutting surfaces 14. The cutting surface may be planar or curved, and may be multi-faceted. The tip may include a broach that extends parallel or at an angle to the tip. The broach may be partially or completely interrupted by one of the cutting surfaces. The tip is designed to be coupled to any of a variety of bone anchor types, including those that have mechanical retention structures, those that change shape in response to insertion into bone, or those that have threads for advancing the anchor into bone. The anchor and the body may be integrally formed together, or the anchor and the body may be formed from different materials.SELECTED DRAWING: Figure 1

The utility model discloses a broaching and planing device for metal plate machining. The broaching and planing device comprises a grooving mechanism and electric push rods installed on the front side and the rear side of the grooving mechanism. Self-locking mechanisms are symmetrically arranged on the two sides of the top end of the grooving mechanism, and the outer sides of the self-locking mechanisms are fixedly connected to the interior of the connecting plate. The grooving mechanism comprises a workbench, a first through hole is formed in one end of the workbench, and a first roller is rotationally connected to the interior of the first through hole; first supports are arranged at the front end and the rear end of one side of the first through hole correspondingly, and second supports are arranged on the sides, away from the first through hole, of the two first supports. Wherein the bottom end of the first support is fixedly connected with the workbench, the center position of the top end of the first support is in threaded connection with a lead screw, by arranging the grooving mechanism, grooving treatment can be conducted on a metal plate body, burrs generated in the machining process of the metal plate body can be polished, and therefore the quality of a workpiece is improved.

The invention discloses a loose tooling forging device for a complex cake-shaped blank and a production method for the complex cake-shaped blank, belongs to the technical field of loose tooling forging, and is used for solving at least one of the problems that a cavity is not fully filled, corners are lack of materials and the overall dimension deviation is large after the blank is formed in the prior art. The device comprises a forming center die, a forming ring gasket and a mounting table, the forming center die is arranged on the mounting table, and the outer wall of the forming center die is sleeved with the forming ring gasket. The method comprises the following steps: providing a hollow cake-shaped blank, and sequentially carrying out primary saddle chambering and double-sided flattening on the hollow cake-shaped blank to obtain a flattened blank; forming an inner concave baffle on the inner edge of the upper end surface of the flattened blank to obtain a blank with the inner concave baffle; and the blank with the inner concave baffle is sequentially subjected to secondary saddle broaching and forming die forging, and the complex cake-shaped blank is obtained. The method can be used for loose tooling forging of complex cake-shaped blanks.

This invention relates to a tool release / broaching mechanism and a spindle, belonging to the field of CNC machining equipment technology, and aims to solve the problem of high manufacturing costs in tool release / broaching mechanisms. The tool release / broaching mechanism includes: a shaft core with a sliding hole along its radial direction; a pull rod assembly slidably disposed within the shaft core in a first direction, the pull rod assembly including a sliding column extending from the sliding hole and capable of sliding within the sliding hole; and an elastic component disposed on the outer circumference of the shaft core; wherein, pushing the sliding column towards the elastic component allows the pull rod assembly to slide to the tool release position, at which point the elastic component is compressed, generating a restoring force; under the action of the restoring force, the pull rod assembly can slide away from the elastic component to the tool broaching position. This invention, by setting a sliding column and a sliding hole, utilizes the sliding fit between the sliding column and the sliding hole to achieve the tool release / broaching function of the pull rod assembly, thus allowing the elastic component to be fitted onto the outer circumference of the shaft core. This saves on the manufacturing costs of the tool release / broaching mechanism.

The utility model discloses a broaching device for machining a special-shaped structure on the inner wall of a pipe fitting, and relates to the technical field of broaching devices, the broaching device comprises a base, an end plate is fixedly arranged at one end of the base, a plurality of brackets are fixedly arranged on the base, a central column is fixedly arranged on the end plate, a sliding block is arranged on the central column in a sliding mode, and the bracket is fixedly arranged on the sliding block. A sliding block is installed on the bracket, a pair of broaching tools I and II is fixedly arranged on the sliding block, a sliding block driving assembly is installed on the end plate, and a plurality of ejector rods are fixedly arranged on the end plate. Pipe fittings can be supported through the bracket, and it can be guaranteed that gaps can be reserved between the pipe fittings and the end plate through the ejector rods; the sliding block can be conveniently and completely moved out of the pipe fitting, the sliding block is pulled to move through the sliding block driving assembly, rectangular protrusions on the two side walls of the pipe fitting are broached through the first broaching tool and the second broaching tool, the moving track of the sliding block can be limited through the center column, and broaching precision is guaranteed.