1790results about "Turning machines" patented technology

The invention relates to the technical field of turning machining, in particular to a numerical control turning machine tool for fastener machining, which comprises a machine shell, a tool rest column body, a tool apron body and a chuck, and further comprises a surface cover shell bolted to the tool apron body, a plurality of auxiliary rollers are rotatably connected to the inner side of the cover shell, a magnetic synchronous belt is further arranged on the inner side of the cover shell, and the magnetic synchronous belt is arranged on the outer side of the tool apron body. The side, close to the housing, of the tool apron body is further in bolting connection with a fixing plate, and the surface of the fixing plate is in bolting connection with a square electromagnet. The square electromagnet is started, and when the tool apron body moves, metal chips on the top and the side edge of the tool rest column body are attracted to the surface of the magnetic synchronous belt, so that the situation that the magnetic synchronous belt is directly contacted with the tool rest column body to be stained and damaged in a large area is avoided; in the process of adsorbing the metal chips, the metal chips cannot move slightly on the surface of the tool rest column body, the tool rest column body is not prone to being abraded, and the service life of the tool rest column body is prolonged.

The invention relates to the technical field of machining, in particular to a flexible clamp for turning a variable-diameter thin-wall cylinder component and a turning method. The flexible clamp comprises a supporting mechanism and a flexible supporting clamp mechanism which are detachably connected, the supporting mechanism comprises a supporting rod, the supporting rod is detachably connected with the flexible supporting clamp mechanism, and the flexible supporting clamp mechanism comprises a plurality of first supporting assemblies arranged in the circumferential direction. The flexible supporting clamp mechanism can be inserted into the variable-diameter cylinder section of the variable-diameter thin-wall cylinder component in the axial direction of the variable-diameter thin-wall cylinder component, and the first supporting assembly is adjusted to extend in the radial direction so that the first supporting assembly can abut against the inner wall of the variable-diameter cylinder section. The flexible supporting clamp mechanism can effectively avoid workpiece deformation caused by lateral component force, and the flexibility of the flexible clamp is improved. In the machining process, the elastic deformation and vibration of the barrel are controlled within a very small range, and the machining precision is remarkably improved.

The invention relates to the technical field of precision automatic lathe machining, in particular to a precision automatic lathe workpiece machining method which comprises the steps that a double-spindle synchronous machining mode is adopted to achieve seamless connection of rough machining and finish machining, clamping errors are reduced, a servo motor drives a tool shaft to achieve nanoscale feeding compensation, and traditional mechanical transmission precision limitation is broken through. The integrated infrared temperature measurement module monitors the temperature of a cutting area in real time and dynamically adjusts the spraying angle and flow of cooling liquid based on machining parameters, machining thermal deformation is effectively controlled, and a dynamic weight self-adaptive interpolation model is established to balance machining efficiency and contour precision. Main shaft load, tool vibration and workpiece deformation data are collected in real time through a multi-sensor data fusion system, axial following errors are corrected through an iterative learning control algorithm, contour consistency is improved, surface defects are eliminated through a nanoscale vibration compensation mechanism, machining efficiency is improved, and machining precision is improved.

The invention discloses a turning machine tool for continuous machining, and belongs to the technical field of turning machine tools, the turning machine tool comprises a machine tool body, a spindle box is arranged on the machine tool body, a rotating assembly used for clamping a plurality of workpieces is connected to the spindle box, the workpieces are arranged in an annular array, and a connecting assembly is sleeved with the output end of the spindle box. According to the lathe, the multiple workpieces to be machined are turned under the same machining condition, the consistency of the machining size, the shape and the surface quality can be guaranteed, when the multiple workpieces to be machined are continuously machined, the temperature of the lathe body and the temperature of the chuck are relatively stable, and the machining efficiency is improved. And the influence of thermal deformation caused by temperature change on the machining precision is reduced, and the operation frequency and the working intensity of operators can be reduced through batch clamping and unloading, so that the labor cost is reduced, the operators can complete more machining tasks in a shorter time, and the labor productivity is improved.

The invention provides efficient integrated machining equipment for automobile hubs, and relates to the technical field of hub machining, the efficient integrated machining equipment comprises a turning numerical control table, a hydraulic expansion mandrel, a turning assembly and a turning rack, the turning numerical control table is fixedly installed at the side end of the turning rack, the hydraulic expansion mandrel is fixedly installed on the turning numerical control table, and the hydraulic expansion mandrel is fixedly installed on the turning rack. The turning assembly is fixedly installed on the turning machine frame, a recycling mechanism for recycling waste liquid is arranged on the turning machine frame, a processing mechanism for processing the waste liquid is arranged on the turning machine frame, and the recycling mechanism comprises a turning protective cover, a cooling spray head and a V-shaped guide plate. According to the device, the V-shaped guide plate, the coarse separation box, the stainless steel wire net, the recycling box, the filtering layer and the scrap box are matched, and functional modules such as waste liquid diversion recycling, preliminary separation, metal scrap adsorption, scraping and collection, waste liquid fine filtering and waste scrap temporary storage are compactly integrated on turning equipment; and extra arrangement of a huge and dispersed external system for waste treatment is avoided.

The invention relates to the technical field of shaft part machining, in particular to shaft part turning multi-station machining equipment which comprises a multi-station machining table and a rotary table rotationally installed on the multi-station machining table, and a plurality of containing holes evenly distributed in the circumferential direction are formed in the top of the rotary table. Depth adjusting mechanisms which are in one-to-one correspondence with the placing holes and are positioned below the placing holes, and fixing mechanisms for fixing the shaft parts are mounted on the rotary table. According to the device, through linkage cooperation of the clamping assembly, the second movable plate, the fixing assembly, the connecting assembly and the driving assembly, multiple shafts with different diameters can be fixed at the same time, meanwhile, the driving assembly drives the second movable plate to move downwards, when the clamping assembly clamps the shafts, the fixing assembly on the second movable plate conducts secondary locking on the clamping assembly, and therefore the clamping assembly is fixed. And meanwhile, the second movable plate and the rotary table are connected and locked through the connecting assembly, it is ensured that the position of the second movable plate is stable, and the locking firmness of the fixing assembly on the clamping assembly is further improved.

The invention relates to the technical field of shaft part machining devices, in particular to a turning device for metal shaft part machining, which comprises a machine tool body, a guide rail and a chuck, a frame body is arranged on the guide rail, one end of the frame body is slidably connected with a sleeve, one end of the sleeve penetrates through the frame body and extends to the outside of the frame body, and the chuck is arranged on the guide rail. A clamping mechanism is arranged at the end, located outside the frame body, of the sleeve, a material leaking hole is formed in the lower surface of the sleeve and communicates with the frame body, a strip-shaped groove is formed in the upper surface of the sleeve, and a discharging assembly is arranged in the strip-shaped groove; according to the metal shaft cutting device, the clamping assembly, the discharging assembly, the buffering assembly and the like are arranged and used in cooperation, when the metal shaft is cut off, the clamping assembly can clamp the metal shaft, in this way, when the metal shaft is cut off, the metal shaft cannot directly fall off, and then the problem that the metal shaft with huge kinetic energy directly falls off and is prone to damage is avoided.

The production equipment comprises a base and a top frame, a first rotating and fixing mechanism is fixedly installed on one side of the top end of the base, and a second rotating and fixing mechanism is fixedly installed on the side, close to the first rotating and fixing mechanism, of the top end of the base; a bearing ring blank to be machined is arranged between the first rotating and fixing mechanism and the second rotating and fixing mechanism, an inner cutting mechanism is fixedly arranged at the bottom of the top frame, and an outer cutting mechanism is fixedly arranged at the top of the top frame. The first rotating and fixing mechanism comprises a first longitudinal frame, and the first longitudinal frame is fixedly installed on one side of the top end of the base. According to the bearing ring machining device, the first rotating and fixing mechanism and the second rotating and fixing mechanism are arranged, and the internal cutting mechanism and the external cutting mechanism are used in cooperation, so that bearing ring blanks can be subjected to external expansion positioning; and in addition, synchronous turning machining of the inner side and the outer side of the bearing ring blank is achieved, the turning machining efficiency of the bearing ring blank is improved, and the overall machining efficiency of the bearing ring is effectively improved.

The invention provides a high-precision spinning forming process method for a ribbed cylinder section, and aims to solve the problems of diameter expansion, unevenness in deformation and the like in the traditional spinning process. The process comprises the following steps: performing double-sided turning on a prefabricated cylinder blank to ensure the inclination, mounting a spinning mold with a rib structure, heating the cylinder blank, and sleeving the heated cylinder blank on a mold with an inner cross groove to realize interference fit. And then, a three-spinning-roller spinning machine is started for spinning, the plasticity of the material is improved through induction heating, and the material flows into a cross groove of the mold. And after spinning is completed, the spinning roller is replaced with a turning tool, the outer surface is turned, and finally the part is taken out. According to the method, the inner diameter is controlled through material thermal expansion coefficient difference and diameter compensation, and boundary dimension homogenization is achieved through the induction heating and in-situ turning technology. The process is suitable for materials such as aluminum alloy and high-strength steel, the size precision of the cylinder section is remarkably improved, and technical support is provided for overall near-net forming of aircraft cylinder sections such as tactical projectiles. The spinning process is optimized, and the quality and performance of a final product are improved.

The invention discloses a chamfering machine for machining mechanical parts, and belongs to the technical field of chamfering machines, the chamfering machine for machining the mechanical parts comprises a fixed rack, and a sliding limiting mechanism is fixedly mounted in the center of the top of the fixed rack; a rotary limiting mechanism is fixedly mounted at the center of the top of the sliding limiting mechanism, a rotary feeding mechanism matched with the rotary limiting mechanism is further fixedly mounted at the top of the fixed rack, and two sets of symmetrically-arranged turning and chamfering mechanisms are slidably mounted on the two sides of the top of the sliding limiting mechanism correspondingly; a servo driving mechanism used for driving the two turning and chamfering mechanisms is installed at the bottom of the sliding limiting mechanism. According to the rotary feeding mechanism simple in design, the left feeding disc and the right feeding disc are controlled by the first servo motor to move, so that the conveying, machining pause and conveying and discharging processes are smoother, the machining pause time is shortened, and meanwhile the overall machining efficiency is improved.

The invention relates to a machining device for optical workpieces, to a use of a cross-table, and to a method for facing an optical workpiece, wherein the workpiece is first fed to a tool along a roller-supported feed axle and is then machined by facing only by axial movement of the tool. Furthermore, the workpiece being machined is moved along a transverse axis with hydrostatic mounting during machining. This enables a simple and cost-effective design and highly precise machining.

The invention belongs to the technical field of flange machining, and particularly relates to a stainless steel flange turning device which comprises a base frame, a turning structure is arranged at the upper end of the base frame and comprises a lifting plate, the lifting plate is arranged at the upper end of the base frame, and an end face turning tool, an outer circle turning tool and a grooving tool are arranged on the surface of the lifting plate. And a clamping structure is arranged at one end of the turning structure. By arranging the adjusting structure, after a flange piece is turned, the opening plate can move towards the inner wall of the center of the flange piece, so that the flange piece is fixed by the opening plate, then the transfer clamp can move to wrap the flange piece, at the moment, a motor located on one side of the transfer clamp is started, the flange piece can be clamped, and the flange piece can be fixed. And then in the reset process of the telescopic air cylinder, the flange piece can be transferred to be far away from the turning structure by the transfer clamp, so that the flange piece can be automatically taken out after turning, and the taking-out work of the flange piece can be continuously carried out through the reciprocating work of the telescopic air cylinder.

The invention relates to the field of lathes, in particular to a wind power bolt slender shaft turning special machine which comprises a machine body composed of a shell and a base. A main shaft unit, a sliding table unit and a tool rest unit are arranged on the base; the self-avoiding positioning unit is arranged on the main shaft unit, the self-avoiding positioning unit comprises a telescopic positioning assembly and a locking assembly used for locking the positioning assembly, and the positioning assembly is used for conducting double positioning of axial jacking and radial clamping on the wind power bolt; the positioning assembly can contract in the machining process so as to avoid a tool feeding space. The retractable positioning assembly is matched with the locking assembly for linkage unlocking, when the tool rest unit moves to a clamping area, unlocking can be automatically triggered, the claw petals are retracted, the machining space of a tool is completely avoided, and therefore integrated continuous machining of a wind power bolt shaft body and threads at the two ends is achieved. And the procedures of end waste cutting and secondary clamping are thoroughly eliminated.

The invention relates to the technical field of turning devices, and discloses a sheet metal turning device and a stainless steel sheet metal turning method.The sheet metal turning device comprises a lathe bed, a main shaft installed in the lathe bed, a guide rail, a feeding base and a tool rest, and is characterized in that a vibration disc, a driving assembly, a clamp and an overturning assembly are further installed in the lathe bed; and the clamp is movably mounted on the vibration disc. The driving assembly, the vibration disc, the clamp and the overturning assembly are arranged on the lathe bed, when a stainless steel metal plate workpiece is machined, rough machining is conducted firstly, then the workpiece on the main shaft is transferred and fixed to the vibration disc through the driving assembly, the clamp and the overturning assembly, and then the stress of the workpiece is eliminated through vibration; and finally, the workpiece is transferred again and fixed to the main shaft for finish machining, the turning machining of the stainless steel sheet metal part can be adapted through the rough machining, stress removing and finish machining modes, the probability of workpiece deformation is reduced, and the machining quality of products can be improved.

The invention is suitable for the technical field of cutout cock valve balls, and provides an integrated valve ball machining device for a cutout cock, the integrated valve ball machining device for the cutout cock comprises a detection assembly, and a repairing assembly is arranged on one side of the detection assembly; the detection assembly comprises a detection processing machine tool, a supporting frame, a driving motor, a driving table, a supporting plate, a first limiting strip, a second limiting strip, a fixing piece and a detection piece. The repairing assembly comprises a bearing plate, a sliding rail, an electric sliding table, a transverse plate, an adjusting air cylinder, a displacement plate, a vertical plate, an extension column and a repairing cutter. Through the design of the detection assembly, the surface of the turned spherical valve element can be subjected to circular surface detection, so that the surface quality of the spherical valve element meets the standard, the machining precision of a product is improved, the service life of the product is prolonged, and the production efficiency and the quality stability of the product are improved.

The invention relates to a multi-tool-position metal cutting numerical control lathe which comprises a lathe body, a main shaft, an annular piece, a tool clamping mechanism and a feeding mechanism. The main shaft is rotatably mounted on the lathe body; the annular piece and the main shaft are coaxially arranged; the multiple tool clamping mechanisms are arranged in the circumferential direction of the annular part at intervals. Each tool clamping mechanism comprises a sliding base, a clamping base, a clamping plate and a limiting driving assembly. The sliding seat is mounted on the annular piece in a sliding manner along the radial direction of the annular piece; the clamping seat is rotatably mounted on the sliding seat; the multiple clamping plates are installed on the clamping base in a sliding mode, and the multiple clamping plates are arranged in a circular array mode with the axis of the clamping base as the circle center. The limiting driving assembly can drive the clamping plate to move so as to clamp the tool, and the limiting driving assembly can further limit rotation of the clamping base. Therefore, the cutters can be clamped, the angles of the cutters can be adjusted, and then the CNC system controls the feeding mechanism to drive the cutters to cut workpieces at the same time.

The invention discloses a crankshaft turning eccentric tool and a machining process, and belongs to the technical field of crankshaft machining. The crankshaft eccentric turning tool comprises a flange plate, the flange plate is installed on a machine tool spindle, an eccentric block is arranged on one side of the upper portion of the flange plate, an end cover is arranged above the eccentric block, an eccentric gasket is arranged between the eccentric block and the end cover, an installation rod is further arranged above the flange plate, and an expansion sleeve is connected into the installation rod in a sleeved mode. A through groove for the crankshaft to penetrate through is formed in the center line of the expansion sleeve, and a pull rod is arranged below the expansion sleeve. The problems that an existing clamping tool is complex in working procedure and long in model changing time, and the dimensional stability is difficult to guarantee are solved. The requirements of crankshafts of different specifications are met by changing the thickness of the eccentric gasket, the model changing step is simplified, the size precision and quality stability of products are guaranteed, the production efficiency is effectively improved, and the production cost is reduced.

The invention relates to the technical field of eccentric shaft machining lathes, in particular to an eccentric shaft machining lathe with an eccentric center structure, which comprises a lathe main body, a fixed frame is fixedly connected to one side of the lathe main body, a movable frame is arranged on the fixed frame in a sliding fit manner, and a rotating seat is rotatably connected to the movable frame; a transmission mechanism is rotationally connected to the rotating seat, a stabilizing ring frame is rotationally connected to the rotating seat, a follow-up rotating ring is rotationally connected to the stabilizing ring frame, an eccentric block center mechanism is fixedly connected to the follow-up rotating ring, and an eccentric shaft is clamped and fixed to a three-jaw chuck on the lathe body; the eccentric block center mechanism is arranged on the follow-up rotating ring, the two angle-adjustable center plates abut against the fan-shaped eccentric block on the eccentric shaft, when the eccentric shaft rotates for machining, the fan-shaped eccentric block on the eccentric shaft is more stably and accurately supported, vibration, unbalance and deformation are reduced, and the machining precision and quality are improved.

The invention relates to a rearview mirror large-diameter mirror rod outer circle turning and thread rolling full-automatic machining all-in-one machine which comprises a rack, a material pushing mechanism, an outer circle turning mechanism, a transmission mechanism and a thread rolling mechanism, the rack is provided with two material stacking areas arranged side by side, and the material pushing mechanism pushes two raw material rods into the outer circle turning mechanism; the outer circle turning mechanism comprises a driving assembly, a first seat body, a second seat body, two hollow chucks, a turning tool assembly and a first driving part, the first seat body is fixedly arranged on the rack, the second seat body is located on the side, away from the push rod, of the first seat body, and the two hollow chucks are rotationally connected to the two seat bodies correspondingly; the turning tool assembly is arranged between the first seat body and the second seat body; the transmission mechanism is located between the second base body and the thread rolling mechanism, and the two raw material rods are conveyed to a feeding opening of the thread rolling mechanism in the same direction. The material pushing mechanism can push the two raw material rods to enter the outer circle turning mechanism at the same time, two machining devices do not need to be arranged side by side, and the machining speed of a follow-up thread rolling machine is better matched.

The invention belongs to the technical field of metal turning, and particularly relates to ring metal forging turning equipment which comprises a base frame, an operation platform is arranged at the upper end of the base frame, a turning structure and an adjusting structure are arranged on the surface of the operation platform, and a titanium alloy ring is placed in the adjusting structure; the turning structure comprises a turning frame. By arranging the adjusting structure, the middle of the outer side of the titanium alloy ring can be clamped and fixed when the titanium alloy ring is turned, the inner hole tool and the outer turning tool are arranged at the two ends of the titanium alloy ring correspondingly, and the inner hole tool and the outer turning tool are clamped and fixed when the titanium alloy ring is turned. The inner hole cutter and the outer turning cutter can move towards the titanium alloy ring through the screw rod, finally, the outer turning work and the inner turning work of the titanium alloy ring are conducted at the same time, and due to the fact that the moving speed of the inner hole cutter and the moving speed of the outer turning cutter are consistent, the inner turning precision and the outer turning precision can be improved. Therefore, the titanium alloy ring after turning can be mounted more easily and accurately aligned.

The invention discloses a self-priming pump shell machining device, and relates to the technical field of self-priming pump shell machining. The device comprises a shell with a window, a horizontal moving platform and a machining part are arranged in the shell, the machining part comprises a pressurizing paddle, a cutter rod and an electromagnetic regulation and control type speed change structure, and redundant materials in the shell are efficiently removed. A bidirectional servo screw rod is adopted to accurately control the displacement of the self-priming pump shell; a pressurizing cover pipe and a top collecting tower are arranged to actively collect machining chippings, and the environmental safety is improved; a clamping regulation and control electric cylinder is matched with a replaceable stud structure, and flange plates of different specifications are rapidly stabilized.

The lathe comprises a lathe body, a guide rail, a rotating chuck and a movable base, a material changing device is arranged on one side of the lathe body and comprises a containing frame, a lifting frame and a material changing frame, a material preparing station is arranged in the containing frame, and the lifting frame and the material changing frame are driven by a lifting air cylinder and a telescopic air cylinder correspondingly; a feeding groove and a discharging groove are formed in the end, close to the lathe body, of the material changing frame, an advancing groove matched with the material preparing station is formed in the top of the material changing frame, and an ejection block driven by an ejection spring is arranged in the center of the rotating chuck. Meanwhile, the machined cam shaft is ejected out of the chuck and is received by the discharging groove, and automatic exchange of new and old workpieces is achieved. Automatic and continuous feeding and discharging of camshaft machining are achieved, the waiting time of a machine tool is remarkably shortened, and the machining efficiency and the equipment utilization rate are improved.

The invention relates to the technical field of engine cylinder block assembly turning machining equipment, and particularly provides a machining device for a precise assembly of an engine cylinder block. Comprising a machining base, and two inner supporting assemblies used for jointly internally supporting and clamping the air cylinder sleeve are horizontally and oppositely installed on the machining base in a sliding mode; a turning mechanism is installed on the machining base in the same direction of the inner supporting assemblies in a horizontal sliding driving mode and located between the two inner supporting assemblies. According to the device provided by the invention, a multiple center guide structure with internal supporting and external clamping is adopted, continuous turning machining can be carried out on the outer wall and the two ends of the cylinder sleeve, on the basis of improving the turning stability, the turning precision is improved, and the turning quality and the subsequent use effect of the cylinder sleeve are guaranteed.

The invention discloses an intelligent processing machine tool for a belt pulley, and relates to the technical field of belt pulley processing, the intelligent processing machine tool comprises a base, a belt pulley to be polished is arranged above the base, a fixed seat is arranged above the base, a transmission shaft is arranged in the fixed seat, and the end part of the transmission shaft is connected with a rotating shaft of external motor equipment; an air box is arranged outside the transmission shaft, a connecting frame is arranged on the outer wall of the air box, one end of the connecting frame is fixedly connected with the fixing base, a sliding barrel is arranged on the inner wall of the air box, a plurality of protruding blocks are arranged in the sliding barrel, and the outer walls of the protruding blocks make contact with the inner wall of a center hole of the belt wheel. The position of the belt pulley is fixed through the extrusion effect of the multiple protruding blocks on the inner wall of the center hole of the belt pulley, and on the basis that the machining efficiency is guaranteed, the overall grinding quality of the belt pulley is improved.

The invention relates to the field of feeding lathes, and discloses a multi-directional machining system for a feeding lathe, which comprises a rack used for supporting a whole device, a main shaft is arranged on the inner wall of the rack, a frame body is arranged on the upper surface of the rack, and a movable turning tool is arranged on the upper surface of the rack; the lateral machining mechanism is arranged on the side, away from the movable turning tool, of the upper surface of the rack; and the opposite machining mechanism is arranged on the side, away from the main shaft, of the upper surface of the rack, is used for machining the workpiece and can drive the workpiece to move, the opposite machining mechanism comprises a first moving rail, and a second moving rail is installed at the upper end of an output shaft of the first moving rail. According to the machining device, the auxiliary shaft assembly is arranged in the object machining mechanism, in the machining process, a workpiece can be pulled out of the interior of the main shaft through an auxiliary shaft, then the workpiece can be cut off through a turning tool, and then the workpiece can be driven to be close to the third power head through the auxiliary shaft to achieve machining of a shielding area.

The invention discloses a raceway turning treatment device suitable for machining a thin-wall bearing ring, which aims at the turning action of a raceway in the bearing ring and particularly improves the action process of a turning wheel by taking an outer tightening roller as an outer clamping structure of the bearing ring and taking the turning wheel as a basic structure for executing the turning action. The turning wheel performs directional constant-speed rotation through the connecting frame on the basis of executing turning action, the essence of the turning wheel is that the outer tightening roller and the turning wheel form an inner and outer two-way supporting structure, the vertically-distributed contact sliding blocks are arranged on the basis of the arrangement position of the connecting frame, and when the connecting frame performs directional rotation, the turning wheel and the contact sliding blocks form a cross-shaped supporting area; the free deformation process of the spring frame can also serve as a vibration bearing structure, the synchronous contraction / reset process of the contact sliding block can serve as the energy absorption and release process caused by vibration, and the situation that the turning process is affected by the vibration process is avoided.

The utility model provides a special-shaped shaft clamp tool shaft which comprises a positioning shaft assembly and a shaft sleeve, and the positioning shaft assembly comprises a first positioning shaft and a second positioning shaft which are connected with each other; one end of the second positioning shaft penetrates through the special-shaped shaft hole to be detachably connected with the shaft sleeve, and a clamping space used for clamping the special-shaped shaft is formed between the inner side face of the first positioning shaft and the inner side face of the shaft sleeve; machine tool centre holes are formed in the outer end face of the first positioning shaft and the outer end face of the shaft sleeve respectively, the central axes of the two machine tool centre holes located in the outer end face of the first positioning shaft and the outer end face of the shaft sleeve respectively coincide, the central axes and the central axis of the second positioning shaft intersect at the center of the special-shaped shaft hole, and the included angle formed by the central axes and the central axis is an acute angle. Two times of the angle value of the included angle is complementary with the bending angle value of the special-shaped shaft. According to the tool, the machining and forming steps of the special-shaped bent shaft workpiece are simplified, the positioning precision in the machining process is improved, the machining efficiency is improved, and the workpiece machining rejection rate is reduced.

The invention relates to the technical field of lathes, in particular to a lathe for machining a piston rod of an oil cylinder. An arc-shaped frame, a supporting rod and a rolling ball are arranged on the following frame; the arc-shaped frame is rotatably arranged on the following frame around the axis of the piston rod, and the circle center of the arc-shaped frame coincides with the axis of the piston rod; the supporting rod is movably arranged on the arc-shaped frame in the radial direction of the arc-shaped frame, penetrates through the arc-shaped frame and is in sliding fit with the arc-shaped frame, the supporting rod is hydraulically driven, and a first ball groove is formed in the end, facing the piston rod, of the supporting rod; the first rolling ball is rotationally arranged in the first ball groove, the contact position of the first rolling ball and the piston rod is called a supporting position, a tool is arranged in the tool rest, and the contact position of the tool and the piston rod is called a turning position when the tool turns the piston rod. The side wall of the piston rod is prevented from being damaged, and the situation that when a traditional roller is used for supporting, the roller is out of round due to abrasion is avoided.

The present invention discloses a turning device for processing a ring groove of a piston head of a low-speed machine, the turning device comprising: an X-axis module arranged on a machine platform, a Z-axis module arranged on the X-axis module, a transparent chip guide cover arranged on the Z-axis module through a bracket, and a turning rotary device arranged on the transparent chip guide cover near the Z-axis module; the transparent chip guide cover is provided with an arc-shaped chip feed opening on the side facing the piston head body, a telescopic transmission shaft is provided at the output end of the turning rotary device, one end of the telescopic transmission shaft penetrates through one side of the transparent chip guide cover and is connected to a cutter head, and a connecting component for sealing the arc-shaped chip feed opening and the outer wall of the piston head body is provided on the transparent chip guide cover. The technical solution contacts the outer wall of the piston head body through the arc-shaped chip feed opening in the transparent chip guide cover, and seals the connection between the arc-shaped chip feed opening and the outer wall of the piston head body through the connecting component, thereby limiting the discharge of debris generated during turning through the chip discharge opening of the transparent chip guide cover, and debris splashing is not easy to occur.