Workpiece loading and positioning device for a lathe

Abstract

The application discloses a workpiece loading positioning device of a lathe, which comprises a machine table provided with a main shaft and a loading driving module; a push-clamp assembly, which comprises a cylinder body, a soft magnetic piston, an elastic member, an excitation coil and a wireless power supply module, the cylinder body is connected to the main shaft, the soft magnetic piston is slidingly connected in the cylinder body, one side of the soft magnetic piston is connected with a piston rod, the excitation coil is connected outside the cylinder body, the excitation coil is located on the side of the soft magnetic piston close to the soft magnetic piston, and the two ends of the elastic member are connected with the soft magnetic piston and the cylinder body respectively; and a chuck assembly, which comprises a chuck seat, a linkage block and chuck jaws, the chuck seat is connected to one end of the cylinder body, the linkage block is connected to the piston rod, each chuck jaw is slidingly connected to the chuck seat in the radial direction, the side, away from the piston rod, of the linkage block is provided with a wedge sliding block, and each chuck jaw is provided with a wedge sliding groove. The application has stable and reliable operation, high positioning efficiency, high safety, can significantly reduce the abrasion of the push-clamp assembly and the chuck assembly, has low maintenance cost and high positioning precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lathe equipment, in particular to a workpiece loading positioning device of a lathe. BACKGROUND

[0002] The lathe is a machine tool that mainly uses a turning tool to turn the rotating workpiece. The lathe is the most important type of metal cutting machine tool, mainly including a spindle box and a feed box structure, wherein the spindle of the spindle box is used to drive the workpiece to rotate.

[0003] The rotation of the workpiece is achieved, and the chuck is arranged on the spindle of the lathe to achieve positioning of the workpiece. In the traditional technology, the chuck needs to be adjusted and locked by manual mode. After completing the loading, the chuck is rotated after the spindle drives the clamping workpiece to cooperate with the turning machining. This loading positioning mode has high labor cost and obvious safety hazards, and the positioning efficiency is low. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a workpiece loading positioning device of a lathe, which has fast positioning response, high positioning efficiency, stable and reliable structure, can reduce manual intervention, and has high safety performance.

[0005] According to the workpiece loading positioning device of the lathe of the present application, the workpiece loading positioning device of the lathe comprises:

[0006] The machine table is provided with a spindle and a loading driving module, the loading driving module is connected with a first clamping mechanism;

[0007] The push-clamp assembly comprises a cylinder body, a soft magnetic piston, an elastic member, an excitation coil and a wireless power supply module. The cylinder body is connected to the spindle, the soft magnetic piston is slidingly connected in the cylinder body, one side of the soft magnetic piston is connected with a piston rod, the excitation coil is connected outside the cylinder body, the excitation coil is located on one side of the soft magnetic piston, the two ends of the elastic member are respectively connected with the soft magnetic piston and the cylinder body, the elastic member is used to make the soft magnetic piston form a movement trend away from the excitation coil, and the wireless power supply module is located on the side of the excitation coil away from the soft magnetic piston;

[0008] The chuck assembly comprises a chuck seat, a linkage block and n clamping jaws, n is an integer greater than 2, the chuck seat is connected to one end of the cylinder body, the linkage block is connected to the piston rod, each clamping jaw is slidingly connected to the chuck seat along the radial direction, the side of the linkage block away from the piston rod is provided with n inclined wedge blocks, each clamping jaw is provided with an inclined wedge sliding groove, and the inclined wedge block is slidingly connected to the inclined wedge sliding groove.

[0009] In this embodiment, the chuck seat is provided with n radially extending limiting grooves, each limiting groove is slidingly connected with a limiting block, and each limiting block is connected with a corresponding clamping jaw.

[0010] In this embodiment, the side of the soft magnetic piston close to the excitation coil is conical.

[0011] In the embodiment, the cylinder further comprises a magnetic yoke plate, which is located on the side of the soft magnetic piston away from the excitation coil.

[0012] In the embodiment, the elastic member is a spring, which is located on the side of the soft magnetic piston close to the linkage block.

[0013] In the embodiment, the push-clamp assembly further comprises a communication pipe connected to the cylinder at both ends, the two ends of the communication pipe are located on the opposite sides of the soft magnetic piston, the cylinder and the communication pipe are used for storing liquid, the communication pipe is provided with an on-off control module, and the push-clamp assembly further comprises a trigger module located on one side of the on-off control module.

[0014] In the embodiment, the on-off control module comprises a wireless charging receiving module and a piezoelectric valve, the piezoelectric valve is connected to the communication pipe, the wireless charging receiving module is electrically connected with the piezoelectric valve, and the trigger module is a wireless charging transmitting module.

[0015] In the embodiment, the material screening and supplying assembly further comprises a material screening and supplying assembly located on one side of the material loading driving module, and the material loading driving module is used for driving the first clamping mechanism to reciprocate between the material screening and supplying assembly and the chuck assembly.

[0016] In the embodiment, the material loading driving module comprises a first radial driving mechanism and a first axial driving mechanism, the first clamping mechanism is connected to the first axial driving mechanism, and the first axial driving mechanism is connected to the first radial driving mechanism.

[0017] In the embodiment, the material screening and supplying assembly comprises a vibrating screen, a feeding track, a second axial driving mechanism, a second radial driving mechanism and a second clamping mechanism, the feeding track is connected to the vibrating screen, the second axial driving mechanism is connected with a push block, the second clamping mechanism is connected to the second radial driving mechanism, and the second axial driving mechanism and the second radial driving mechanism are located on the opposite sides of the feeding track.

[0018] The embodiment of the application has at least the following beneficial effects:

[0019] The soft magnetic piston can be driven to realize the clamping action of the chuck assembly through the wireless power supply module and the excitation coil, the excitation coil is driven to operate in a non-contact mode, the limitation caused by fixed connection of the line can be eliminated, the design layout difficulty can be effectively reduced, the operation action is stable and reliable, the positioning efficiency is high, manual intervention can be significantly reduced, the labor cost is low, and the safety is high; The magnetic field formed by the excitation coil drives the soft magnetic piston on the axial side, the positioning response speed is high, the soft magnetic piston can drive the linkage block to realize axial displacement through the piston rod, under the steering action of the inclined wedge block and the inclined wedge groove, the clamping jaw radially slidingly connected to the clamping seat can realize stable and reliable clamping action, and the coaxiality of clamping and positioning is high; In addition, when the main shaft rotates, the soft magnetic piston, the cylinder body and the chuck assembly rotate synchronously, the reliability of the clamping and positioning action can be significantly improved, the wear in the push-clamp assembly and the chuck assembly can be significantly reduced, the maintenance cost is low, the service life is long, the positioning error caused by wear accumulation can be effectively reduced, the positioning precision is high, and the machining precision of the applied lathe can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1 It is a perspective structural schematic view of the workpiece loading and positioning device of the lathe of the embodiment of the present application;

[0022] Figure 2 It is a perspective structural schematic view of the workpiece loading and positioning device of the lathe of the embodiment of the present application hidden behind the machine table;

[0023] Figure 3 It is a top view structural schematic view of the workpiece loading and positioning device of the lathe of the embodiment of the present application;

[0024] Figure 4 It is a sectional view structural schematic view along Figure 3 A-A';

[0025] Figure 5 It is an enlarged structural schematic view of B; Figure 4

[0026] Figure 6 It is an exploded structural schematic view of the chuck assembly in the workpiece loading and positioning device of the lathe of the embodiment of the present application;

[0027] Figure 7 It is an exploded structural schematic view of the chuck assembly in the workpiece loading and positioning device of the lathe of the embodiment of the present application from another perspective.

[0028] Reference signs:

[0029] ​Machine table 100, main shaft 110, feeding drive module 120, first radial drive mechanism 121, first axial drive mechanism 122, first clamping mechanism 130;

[0030] Push-clamp assembly 200, cylinder body 210, soft magnetic piston 220, piston rod 221, elastic element 230, excitation coil 240, wireless power supply module 250, magnetic yoke sheet 260, communication pipe 270, on-off control module 280, wireless charging receiving module 281, piezoelectric valve 282, trigger module 290;

[0031] Chuck assembly 300, chuck seat 310, let go hole 311, limit groove 312, linkage block 320, inclined wedge sliding block 321, clamping jaw 330, inclined wedge sliding groove 331, limit block 340;

[0032] Screen supply assembly 400, screen vibrator 410, feeding track 420, second axial drive mechanism 430, push block 431, second radial drive mechanism 440, second clamping mechanism 450. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0034] In the description of the present application, it should be understood that, if there is a description of orientation, for example, the orientation or position relationship indicated by up, down, left, right, front, back, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0035] In the description of the present application, if there is a description of first, second, only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0036] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0037] The lathe is mainly used for turning the workpiece rotating on the lathe. The lathe is the most important metal cutting machine tool, mainly including a spindle box and a feeding box and the like structure, wherein the spindle of the spindle box is used to drive the workpiece to rotate. To realize the rotation of the workpiece, the chuck is arranged on the spindle of the lathe to realize the positioning of the workpiece. In the traditional technology, the chuck needs to be adjusted and locked by manual mode. After the loading is completed, the chuck is rotated after the workpiece is clamped by the spindle to cooperate with the turning machining. This loading positioning mode has high labor cost, and has obvious safety hidden danger, and the positioning efficiency is low.

[0038] In part of the technology, the hydraulic drive mode is used to drive the chuck to clamp the workpiece. Although the positioning efficiency is improved compared with manual operation, the piston in the mechanism is connected with the chuck, and the piston is connected with the spindle, and the cylinder shell of the hydraulic cylinder is fixedly connected with the lathe bed, and the cylinder shell of the hydraulic cylinder is connected with the corresponding liquid pump through the pipeline. When the spindle rotates, the piston will rotate relative to the cylinder shell of the hydraulic cylinder, thereby forming obvious wear. The maintenance cost is high, the wear accumulation will cause the positioning accuracy to decrease obviously, thereby affecting the turning machining precision.

[0039] The following refers to the drawings Figure 1 to the drawings Figure 7 The workpiece loading positioning device of the lathe is described. The positioning response is fast, the positioning efficiency is high, the structure is stable and reliable, the manual intervention can be reduced, and the safety performance is high.

[0040] Referring to Figures 1 to 7 The workpiece loading positioning device of the lathe of the embodiment of the application comprises:

[0041] The machine table 100 is provided with the spindle 110 and the loading driving module 120 adjacent along the axial direction. The spindle 110 is used to output the rotating force. The loading driving module 120 is connected with the first clamping mechanism 130. The loading driving module 120 is used to drive the first clamping mechanism 130 to move towards the spindle 110. The first clamping mechanism 130 is used to clamp the workpiece.

[0042] The push-clamp assembly 200 comprises a cylinder 210, a soft-magnetic piston 220, an elastic member 230, an excitation coil 240 and a wireless power supply module 250. The cylinder 210 is connected to the main shaft 110. The soft-magnetic piston 220 is slidingly connected in the cylinder 210. One side of the soft-magnetic piston 220 is connected with a piston rod 221 extending out of the cylinder 210. The cylinder 210 is provided with a through hole for the piston rod 221 to pass through. The excitation coil 240 is connected outside the cylinder 210 and along the extension direction of the cylinder 210. The excitation coil 240 is located at one side of the soft-magnetic piston 220. The two ends of the elastic member 230 are respectively connected with the soft-magnetic piston 220 and the cylinder 210. The elastic member 230 is used to make the soft-magnetic piston 220 form a movement trend away from the excitation coil 240. The wireless power supply module 250 is located at the side of the excitation coil 240 away from the soft-magnetic piston 220. The wireless power supply module 250 is connected to the machine table 100.

[0043] The chuck assembly 300 comprises a chuck seat 310, a linkage block 320 and n clamping jaws 330, where n is an integer greater than 2. The chuck seat 310 is connected to one end of the cylinder 210. The linkage block 320 is connected to one end of the piston rod 221 outside the cylinder 210. Each clamping jaw 330 is slidingly connected to the chuck seat 310 in the radial direction. The chuck seat 310 is provided with a radial extension clearance hole 311. The linkage block 320 is axially arranged in the clearance hole 311, so that the linkage block 320 can slide axially relative to the chuck seat 310. The side of the linkage block 320 away from the piston rod 221 is provided with n inclined wedge blocks 321 matched with each corresponding clamping jaw 330. The inclined wedge blocks 321 are inclined outward and close to the clamping jaws 330 along the central axis of the linkage block 320. Each clamping jaw 330 is provided with an inclined wedge slot 331 matched with each corresponding inclined wedge block 321. The inclined wedge blocks 321 and the inclined wedge slots 331 extend along the included angle between the radial direction and the axial direction. Each inclined wedge block 321 is slidingly connected in the corresponding inclined wedge slot 331. Preferably, along the direction of inclined extension, the cross sections of the inclined wedge blocks 321 and the inclined wedge slots 331 are in inverted T shape or swallowtail shape, which can form reliable limiting and guiding effects.

[0044] It should be noted that the radial direction refers to the diameter extension direction of the main shaft 110, and the axial direction refers to the extension direction of the main shaft 110.

[0045] In the initial state, under the elastic force of the elastic member 230, the soft magnetic piston 220 is located away from the excitation coil 240, the piston rod 221 is in a retracted state, and under the action of the linkage block 320, each clamping jaw 330 is loosened away from the center of the clamping seat 310 to form a space for inserting the workpiece; the first clamping mechanism 130 is driven by the feeding drive module 120 to move close to the main shaft 110 until the workpiece clamped by the first clamping mechanism 130 is fed into the space, i.e., into the surrounding area of each clamping jaw 330; the wireless power supply module 250 operates and drives the excitation coil 240 to work to generate a magnetic field, under the action of the Maxwell stress, the soft magnetic piston 220 moves close to the excitation coil 240, thereby driving the linkage block 320 to move axially through the piston rod 221, under the linkage action of the inclined wedge block 321 and the inclined wedge slot 331, each clamping jaw 330 moves along its radial direction to the center of the clamping seat 310 to simultaneously clamp the workpiece; after the first clamping mechanism 130 loosens the workpiece, the feeding drive module 120 drives the first clamping mechanism 130 to reset, thereby providing space for turning processing; after the turning processing is completed, the wireless power supply module 250 stops supplying power to the excitation coil 240, and the soft magnetic piston 220 is reset under the action of the elastic member 230, thereby driving each clamping jaw 330 to loosen the workpiece. During operation, since the wireless power supply module 250 and the excitation coil 240 supply power in a non-contact manner, the restriction of the cylinder body 210, the soft magnetic piston 220 and the chuck assembly 300 can be effectively reduced, and the wear between the soft magnetic piston 220 and the chuck assembly 300 can be effectively reduced.

[0046] The soft magnetic piston 220 can be driven to clamp the chuck assembly 300 by the wireless power supply module 250 cooperating with the excitation coil 240, the excitation coil 240 can be driven to operate in a non-contact manner, the restriction of the lines and pipelines caused by fixed connection can be eliminated, the design layout difficulty can be effectively reduced, the operation is stable and reliable, the positioning efficiency is high, manual intervention can be significantly reduced, the labor cost is low, and the safety is high; the magnetic field formed by the excitation coil 240 drives the soft magnetic piston 220 on the axial side, the positioning response speed is high, the soft magnetic piston 220 can drive the linkage block 320 to realize axial displacement through the piston rod 221, under the steering action of the inclined wedge block 321 and the inclined wedge slot 331, the clamping jaw 330 radially slidingly connected to the clamping seat 310 can realize stable and reliable clamping action, and the coaxiality of clamping and positioning is high; in addition, when the main shaft 110 rotates, the soft magnetic piston 220, the cylinder body 210 and the chuck assembly 300 rotate synchronously, which can significantly improve the reliability of the clamping and positioning action, can significantly reduce the wear in the push-clamp assembly 200 and the chuck assembly 300, can eliminate the rotating wear in the push-clamp assembly 200 and the chuck assembly 300, the maintenance cost is low, the service life is long, the positioning error caused by wear accumulation can be effectively reduced, the positioning precision is high, and the machining precision of the applied lathe can be effectively improved.

[0047] It can be understood that the circumferential surface of the soft magnetic piston 220 is connected with a piston gasket, and the piston gasket abuts against the inner wall of the cylinder body 210.

[0048] It can be understood that the clamping seat 310 is provided with n radially extending limiting grooves 312, each limiting groove 312 is slidably connected with a limiting block 340, each limiting block 340 is connected with a corresponding clamping jaw 330, and the limiting block 340 and the clamping jaw 330 can be connected by a screw. The assembly between the clamping jaw 330 and the linkage block 320 and the clamping seat 310 can be conveniently realized by cooperating the limiting block 340 with the limiting groove 312, and the precise radial guidance of the clamping jaw 330 is realized.

[0049] Specifically, the cross sections of the limiting groove 312 and the limiting block 340 are in the shape of an I letter, an inverted T letter or a swallowtail, which can effectively improve the stability of the relative position. This design can effectively prevent the clamping jaw 330 from being radially offset when being stressed, can effectively improve the clamping stability, and can reduce the wear gap caused by long-term use.

[0050] It can be understood that the side of the soft magnetic piston 220 close to the excitation coil 240 is conical. This conical design can effectively enhance the magnetic field concentration effect and improve the electromagnetic driving force. Not only can it improve the clamping force of the clamping jaw 330, thereby improving the stability of the clamping action, but also can improve the speed of the clamping response. Specifically, the soft magnetic piston 220 is a nickel-based alloy piston. Through the magnetostrictive effect, the nickel-based alloy can be elongated under the action of the magnetic field, thereby improving the clamping positioning force of the clamping jaw 330, and the stability of the clamping positioning action is high.

[0051] It can be understood that the cylinder body 210 is further provided with a magnetic yoke sheet 260, and the magnetic yoke sheet 260 is located on the side of the soft magnetic piston 220 away from the excitation coil 240. The magnetic yoke sheet 260 can cooperate to realize magnetic circuit closure, reduce magnetic leakage, and improve the utilization rate of magnetic energy. The magnetic yoke sheet 260 can be a silicon steel sheet.

[0052] Specifically, the magnetic yoke sheet 260 surrounds the cylinder body 210 in the circumferential direction. Through the magnetic yoke sheet 260, not only can the magnetic circuit be closed, but also the eddy current heat of the excitation coil can be effectively led out.

[0053] It can be understood that the elastic member 230 is a spring, and the spring is located on the side of the soft magnetic piston 220 close to the linkage block 320. The excitation coil 240 is located on the side of the soft magnetic piston 220 close to the linkage block 320. The two ends of the spring abut against the soft magnetic piston 220 and the cylinder body 210, respectively, so that the soft magnetic piston 220 forms a movement trend away from the linkage block 320. Preferably, the spring is a non-magnetic spring, and the cylinder body 210 is also a non-magnetic shell, which can avoid the interference of the spring and the cylinder body 210 with the magnetic field distribution.

[0054] It can be understood that the push-clamp assembly 200 further comprises a communication pipe 270 connected to the cylinder body 210 at both ends, and the two ends of the communication pipe 270 are located on opposite sides of the soft magnetic piston 220, so that the liquids on both sides of the soft magnetic piston 220 are communicated through the communication pipe 270, and the cylinder body 210 and the communication pipe 270 are used to fill and store the liquid, wherein the liquid can be oil such as hydraulic oil, and the viscous damping characteristics of the oil can effectively absorb high-frequency vibration in the clamping process, thereby improving the stability of the action of the chuck assembly 300 during clamping operation, and it is especially suitable for the working condition of the high-speed spindle 110. The communication pipe 270 is provided with an on-off control module 280, and the on-off control module 280 is used to control the flowability of the liquid in the communication pipe 270. When the on-off control module 280 controls the blockage locking, the amount of liquid at both ends of the soft magnetic piston 220 can be maintained, thereby reliably locking the position of the soft magnetic piston 220, and the energy consumption of clamping positioning can be effectively reduced. The push-clamp assembly 200 further comprises a trigger module 290 located on one side of the on-off control module 280, and the trigger module 290 is connected to the machine shell. The trigger module 290 is used to trigger the on-off control module 280, so as to control the unobstructed or blocked communication pipe 270.

[0055] When it is necessary to lock the position of the soft magnetic piston 220, the on-off control module 280 closes the blockage communication pipe 270, and the incompressibility of the oil is used to achieve rigid locking; when it is necessary to reset, the on-off control module 280 opens the dredging communication pipe 270, and allows the oil to flow to release the pressure.

[0056] It can be understood that the on-off control module 280 comprises a wireless charging receiving module 281 and a piezoelectric valve 282, the piezoelectric valve 282 is connected to the communication pipe 270, and the piezoelectric valve 282 is a normally closed piezoelectric valve 282, which is only opened during power-on operation, and is kept closed in normal state to reduce energy consumption, energy saving and environmental protection. The wireless charging receiving module 281 is electrically connected with the piezoelectric valve 282, the trigger module 290 is a wireless charging transmitting module, the wireless charging transmitting module is used to supply power to the wireless charging receiving module 281 in a non-contact manner through electromagnetic induction, thereby supplying power to the piezoelectric valve 282 to control the on-off of the piezoelectric valve 282. The design of the non-contact control mode can effectively avoid mechanical wear and tear, and can effectively adapt to the working condition of high-speed rotation.

[0057] It should be noted that the on-off control module 280 can also be provided as a contact type control structure, and the on-off control module 280 is provided as a press type normally closed valve. The trigger module 290 comprises a trigger cylinder and a trigger push plate connected to the trigger cylinder. When clamping and positioning, the spindle 110 is in a static state, the trigger push plate is driven by the trigger cylinder to push the press type normally closed valve to open, so as to dredge the communication pipe 270, thereby realizing the flow of the liquids on opposite sides of the soft magnetic piston 220.

[0058] It can be understood that the workpiece loading and positioning device of the lathe of the embodiment of the present application further comprises a screening supply assembly 400 located on one side of the loading driving module 120, the screening supply assembly 400 is located on the radial side of the main shaft 110, which can effectively reduce the length of the overall structure of the lathe, and can facilitate transportation and installation and use, and has strong adaptability. The loading driving module 120 is used to drive the first clamping mechanism 130 to reciprocate between the screening supply assembly 400 and the chuck assembly 300, and the workpieces can be output one by one through the screening supply assembly 400, and the workpieces can be sent to the chuck assembly 300 one by one through cooperation of the loading driving module 120 and the first clamping mechanism 130, and the positioning action is reliable.

[0059] It can be understood that the loading driving module 120 comprises a first radial driving mechanism 121 and a first axial driving mechanism 122, the first clamping mechanism 130 is connected to the first axial driving mechanism 122, the first axial driving mechanism 122 is used to drive the first clamping mechanism 130 to move in the axial direction, the first axial driving mechanism 122 is connected to the first radial driving mechanism 121, the first radial driving mechanism 121 is used to drive the first axial driving mechanism 122 to move in the radial direction, and the first radial driving mechanism 121 is located above the horizontal plane where the main shaft 110 is located, so as to avoid that the first axial driving mechanism 122 and the first clamping mechanism 130 hinder the main shaft 110.

[0060] It can be understood that the screening supply assembly 400 comprises a vibrating screen 410, a feeding track 420, a second axial driving mechanism 430, a second radial driving mechanism 440 and a second clamping mechanism 450, the feeding track 420 is connected to the outlet of the vibrating screen 410, the second axial driving mechanism 430 is connected with a push block 431, the second clamping mechanism 450 is connected to the second radial driving mechanism 440, and the second axial driving mechanism 430 and the second radial driving mechanism 440 are respectively located on opposite sides of the feeding track 420.

[0061] The operation process is as follows: the vibrating screen 410 outputs the scattered workpieces one by one in the designated direction through the feeding track 420, the second axial driving mechanism 430 is used for driving the push block 431 to send the workpieces in the feeding track 420 into the second clamping mechanism 450 along the axial direction, after the second clamping mechanism 450 clamps the workpieces, the second radial driving mechanism 440 drives the second clamping mechanism 450 to move towards the first clamping mechanism 130 along the radial direction; the first axial driving mechanism 122 drives the first clamping mechanism 130 to move towards the second clamping mechanism 450 along the axial direction, the first clamping mechanism 130 clamps the workpieces and the second clamping mechanism 450 releases the workpieces, the first axial driving mechanism 122 drives the first clamping mechanism 130 to move away from the spindle 110 along the axial direction, the first radial driving mechanism 121 indirectly drives the first clamping mechanism 130 to move towards the spindle 110 along the radial direction, the first axial driving mechanism 122 drives the first clamping mechanism 130 to move towards the spindle 110 along the axial direction, so as to send the workpieces into the n clamping jaws 330, the push-clamp assembly 200 drives the chuck assembly 300, so that the n clamping jaws 330 clamp the workpieces, and the first clamping mechanism 130 is reset after releasing the workpieces, so as to realize the accommodation for the subsequent turning machining. The workpieces output by the feeding track 420 are accurately sent into the center of the chuck assembly 300 through the three-stage movement of the axial direction, the radial direction and the axial direction, the positioning effect is accurate and reliable, the turning tool and the feeding positioning assembly can be effectively accommodated, and the overall layout design difficulty of the lathe can be effectively reduced.

[0062] Specifically, the first radial driving mechanism 121 and the second radial driving mechanism 440 are both screw positioning mechanisms, the first axial driving mechanism 122 and the second axial driving mechanism 430 are both air cylinders, and the first clamping mechanism 130 and the second clamping mechanism 450 are both pneumatic fingers. According to the actual clamped workpieces, the first clamping mechanism 130 and the second clamping mechanism 450 are both provided with clamping blocks matched with the workpieces, and different clamping blocks can be replaced to enable the first clamping mechanism 130 and the second clamping mechanism 450 to clamp and position different workpieces.

[0063] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A workpiece loading and positioning device for a lathe, characterised in that, The utility model relates to a kind of machine table and push-clamp assembly, including: Machine table (100), it is equipped with main shaft (110) and feeding drive module (120), the feeding drive module (120) is connected with first clamping mechanism (130); Push-clamp assembly (200), including cylinder (210), soft magnetic piston (220), elastic element (230), excitation coil (240) and wireless power supply module (250), the cylinder (210) is connected to the main shaft (110), the soft magnetic piston (220) is slidably connected in the cylinder (210), the soft magnetic piston (220) one side is connected with piston rod (221), the excitation coil (240) is connected to the cylinder (210) outside, the excitation coil (240) is located in the soft magnetic piston (220) one side, the both ends of the elastic element (230) are connected respectively the soft magnetic piston (220) and the cylinder (210), the elastic element (230) is used to make the soft magnetic piston (220) form the movement tendency that the excitation coil (240) is away, the wireless power supply module (250) is located in the excitation coil (240) side away from the soft magnetic piston (220), the push-clamp assembly (200) further includes the communication pipe (270) both ends of which are connected the cylinder (210), the both ends of the communication pipe (270) are located respectively the opposite sides of the soft magnetic piston (220), the cylinder (210) and the communication pipe (270) are used to store liquid, the communication pipe (270) is equipped with on-off control module (280); Chuck assembly (300), including chuck seat (310), linkage block (320) and n clamping jaw (330), n is the integer greater than 2, the chuck seat (310) is connected to one end of the cylinder (210), the linkage block (320) is connected to the piston rod (221), every clamping jaw (330) is slidably connected to the chuck seat (310) along radial direction, the side of the linkage block (320) away from the piston rod (221) is equipped with n inclined wedge block (321), every clamping jaw (330) is equipped with inclined wedge sliding groove (331), the inclined wedge block (321) is slidably connected to the inclined wedge sliding groove (331).

2. A workpiece loading and positioning device for a lathe as claimed in claim 1, wherein, The chuck seat (310) is equipped with n radial extension limit slot (312), every limit slot (312) is slidably connected with limit block (340), every limit block (340) is connected with corresponding clamping jaw (330).

3. A workpiece loading and positioning device for a lathe as claimed in claim 1, wherein, The side of the soft magnetic piston (220) close to the excitation coil (240) is conical.

4. A workpiece loading and positioning device for a lathe as claimed in claim 1, wherein, The cylinder (210) is further equipped with magnetic yoke sheet (260) outside, the magnetic yoke sheet (260) is located in the side of the soft magnetic piston (220) away from the excitation coil (240).

5. A workpiece loading and positioning device for a lathe as claimed in claim 1, wherein, The elastic element (230) is spring, and the spring is located in the side of the soft magnetic piston (220) close to linkage block (320).

6. A workpiece loading and positioning device for a lathe as claimed in claim 1, wherein, The push-clamp assembly (200) further includes trigger module (290) located in one side of the on-off control module (280).

7. A workpiece loading and positioning device for a lathe as claimed in claim 6, wherein, The on-off control module (280) comprises a wireless charging receiving module (281) and a piezoelectric valve (282), the piezoelectric valve (282) is connected to the communication pipe (270), the wireless charging receiving module (281) is electrically connected with the piezoelectric valve (282), and the trigger module (290) is a wireless charging transmitting module.

8. A workpiece loading and positioning device for a lathe as defined in claim 1, wherein, Further comprising a screening supply assembly (400) located on one side of the feeding driving module (120), and the feeding driving module (120) is used for driving the first clamping mechanism (130) to reciprocate between the screening supply assembly (400) and the chuck assembly (300).

9. A workpiece loading and positioning device for a lathe as claimed in claim 8, wherein, The feeding driving module (120) comprises a first radial driving mechanism (121) and a first axial driving mechanism (122), the first clamping mechanism (130) is connected to the first axial driving mechanism (122), and the first axial driving mechanism (122) is connected to the first radial driving mechanism (121).

10. A workpiece loading and positioning device for a lathe as claimed in claim 9, wherein, The screening supply assembly (400) comprises a screening sieve (410), a feeding track (420), a second axial driving mechanism (430), a second radial driving mechanism (440) and a second clamping mechanism (450), the feeding track (420) is connected to the screening sieve (410), the second axial driving mechanism (430) is connected with a push block (431), the second clamping mechanism (450) is connected to the second radial driving mechanism (440), and the second axial driving mechanism (430) and the second radial driving mechanism (440) are located on opposite sides of the feeding track (420) respectively.

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