Positioning and clamping device of workpiece shaping equipment

Abstract

The invention relates to the technical field of workpiece shaping, in particular to a positioning and clamping device of workpiece shaping equipment, which comprises a lower support and a clamping table fixedly connected with the lower support, and further comprises a plurality of outer clamping jaws distributed at the top of the clamping table in an annular array; through the arrangement of the outer clamping jaw and the inner clamping jaw, the annular workpiece is centered and aligned, and centered clamping and positioning are carried out on the premise that the outer clamping jaw presses the bottom end of the annular workpiece, so that the whole annular workpiece is kept in a stable state, and the top end of the inner clamping jaw can support the top end of the inner ring surface of the annular workpiece; and further clamping is stable through the auxiliary clamping jaws, the clamping area is further increased, supporting on the top end of the inner ring face of the annular workpiece is further increased, and the possibility that the position, close to an upper flange ring, of the top end of a main body of the annular workpiece is further prevented from causing undue deformation is further improved.

Description

Technical Field

[0001] The invention relates to the field of workpiece shaping, and in particular to a positioning and clamping device for workpiece shaping equipment. Background Art

[0002] Workpiece refers to the object to be processed during machining. It can be a single part or a combination of several parts fixed together. There are many ways to process a workpiece, including turning, milling, planing, grinding, casting, forging, etc. The processing procedures of the workpiece also change with the change of the processing method.

[0003] The existing specific annular workpiece specifically comprises an upper flange ring and an annular body, and an annular member is further connected to the inner bottom end.

[0004] The above-mentioned upper flange ring is prone to deformation under the action of cutting force and thermal effect during the forming process, and needs to be pressurized and leveled later. However, during the leveling process, due to the tubular shape of the annular workpiece and the upper flange ring being located at the top of the annular workpiece, when the flange ring is pressurized and leveled, it is easy to cause force on the annular workpiece body near the flange ring, which is not easy to maintain the stability of the shape of the annular workpiece and is prone to deformation caused by unnecessary connection. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a positioning and clamping device for workpiece shaping equipment.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a positioning and clamping device of a workpiece shaping device, comprising a lower support and a clamping table fixedly connected to the lower support, and also comprising: A plurality of outer clamping jaws, wherein the plurality of outer clamping jaws are distributed in an annular array on the top of the clamping platform and are slidably connected to the clamping platform, and rollers are rotatably connected to the clamping surfaces of the outer clamping jaws; A first driving assembly, wherein the first driving assembly is used to synchronously drive the four outer clamps to synchronously approach the bottom end of the annular workpiece, and in the process of approaching the workpiece, the clamps are first kept open, and then flipped to push the workpiece to move toward the center, and then pressed; A plurality of inner clamping jaws, wherein the plurality of inner clamping jaws are distributed in an annular array inside the annular workpiece and are rotatably connected to two auxiliary clamping jaws at the top; The second drive component is used to drive multiple inner jaws to move outward synchronously after the outer jaws are clamped and positioned until the annular workpiece is clamped, and in the clamping process, first adjust the two auxiliary jaws to flip open, and then drive the inner jaws and the flipped open auxiliary jaws to press against the inner ring wall of the annular workpiece.

[0007] It should be understood that the annular workpiece specifically includes an upper flange ring and an annular body, and an annular member is also connected to the inner bottom end. The upper flange ring will be deformed under the action of cutting force and thermal effect in the forming process, and needs to be pressurized and leveled later. However, during the leveling process, due to the tubular shape of the annular workpiece and the upper flange ring located at the top of the annular workpiece, when the flange ring is pressurized and leveled, it is easy to cause a force on the annular workpiece body near the flange ring, which is not convenient for maintaining the stability of the shape of the annular workpiece and is prone to deformation caused by unexplained connection. The technical solution can solve the above problems, as follows: When installing the annular workpiece, the annular workpiece is placed on the top of the clamping table, outside the multiple inner jaws and between the multiple outer jaws, and then the multiple outer jaws are driven to move by the first driving assembly. The outer jaws are first kept in an open state, and are flipped when approaching the annular workpiece. If the annular workpiece deviates from the center position, the outer jaws can be toggled during the flipping process to adjust the annular workpiece in the centering direction, and multiple points of the lower end annular body of the annular workpiece are pressed synchronously. Under the rolling support of the roller, the lateral movement of the annular workpiece is not restricted. After the outer clamping jaws have completed the clamping, the second driving assembly is started, and the second driving assembly synchronously drives the multiple inner clamping jaws to move outward synchronously until the annular workpiece is clamped. In the clamping process, the two auxiliary clamping jaws are first adjusted to flip open, and then the inner clamping jaws and the flipped open auxiliary clamping jaws are driven to close to the inner ring wall of the annular workpiece, so that the annular workpiece is clamped in the center, and the inner wall of the tube body near the upper flange ring position at the top of the annular workpiece is clamped and supported, which is conducive to avoiding unnecessary joint deformation of the top of the main body of the annular workpiece near the upper flange ring during the pressure shaping process of the upper flange ring; It should be further explained that the top of the inner clamp itself can already support the top of the inner ring surface of the annular workpiece. The auxiliary clamp further stabilizes the clamping and further increases the clamping area, which will further increase the support for the top of the inner ring surface of the annular workpiece, and is conducive to further avoiding the possibility of unnecessary deformation of the top of the main body of the annular workpiece near the upper flange ring during the pressure shaping process of the upper flange ring.

[0008] As a further embodiment of the present invention, the first drive assembly comprises: An annular turntable, the annular turntable is rotatably connected to the bottom of the clamping platform; A coil wire, wherein the coil wire is fixedly connected to the top of the annular turntable; A plurality of mounting grooves, wherein the plurality of mounting grooves are arranged on the top of the clamping platform, and a movable seat is slidably connected on the inner wall, and the bottom end of the movable seat is threadedly connected to the surface of the coiled wire; A plurality of flip frames, each of which is rotatably connected to the inside of the plurality of moving seats, and each of which is fixedly connected to a first linkage gear on its surface, and each of which has ends fixedly connected to the plurality of outer clamps; A plurality of first linkage racks, wherein the plurality of first linkage racks are respectively meshed with the bottom ends of the plurality of first linkage gears, and the ends are connected to the inner wall of the movable seat at the corresponding position through the first elastic support member, and the ends of the first linkage racks are fixedly mounted with pressure sensors; A rotation driving unit, wherein the rotation driving unit is used to drive the annular turntable to rotate.

[0009] It should be understood that after the annular workpiece is placed, the annular turntable is driven to rotate by the rotary drive unit, and the annular turntable will threadably drive multiple moving seats to synchronously approach the bottom end of the annular workpiece through the coil wire on the top. In the process of approaching, the end of the first linkage rack will contact the inner wall of the mounting groove for the first time, and the pressure sensor will synchronously detect the pressure received. Under the reaction of the inner wall of the mounting groove, the first linkage rack will compress the first elastic support member, and the first linkage gear will move on the first linkage rack, and then flip over, and approach the annular workpiece while flipping. If the annular workpiece deviates from the clamping position, it will contact before a part of the outer jaws, and the outer jaws will flip while moving. During the process, the annular workpiece is adjusted by toggling until the outer clamping jaws complete flipping and clamping. The outer clamping jaws clamp the annular body at the bottom end of the surface of the annular workpiece, and the clamping surface is in a rolling contact state. As the moving seat continues to move, the force between the first linkage rack and the mounting groove will continue to increase, that is, the contact extrusion force between the outer clamping jaws and the top surface of the annular body at the bottom end of the surface of the annular workpiece is also increasing synchronously. When the pressure detected by the pressure sensor reaches the specified pressure, the rotary drive unit is controlled to stop driving, and the annular body at the bottom end of the surface of the annular workpiece is synchronously clamped and positioned at multiple positions. In addition, during the clamping process, the annular workpiece is adjusted in the centering direction, which is convenient and quick. It should be noted that, by providing a pressure sensor, the clamping pressure of the outer jaw can be indirectly detected, which is beneficial for accurately applying pressure to the bottom end of the annular workpiece and maintaining the stability of the clamping.

[0010] As a further embodiment of the present invention, the first elastic support member comprises: Two first support rods, the two first support rods are fixedly connected to the inner wall of the moving seat, and both are inserted into the end of the first linkage rack. The surfaces of the two first support rods are sleeved with a first support spring, and the two ends of the first support spring are respectively fixedly connected to the first linkage rack and the inner wall of the moving seat.

[0011] It should be understood that the first linkage rack will squeeze the first support spring under the reaction force of the inner wall of the installation groove, but will be restricted and stopped as the moving seat continues to move, thereby providing conditions for the relative movement of the first linkage rack and the first linkage gear, thereby realizing the flip clamping of the linkage outer clamp.

[0012] As a further embodiment of the present invention, the rotation drive unit comprises: Follower teeth, wherein the follower teeth are arranged on the outer ring surface of the annular rotating disk; The motor is fixedly connected to the bottom of the clamping platform, and the output end is fixedly connected with a driving gear, and the driving gear is meshed with the follower gear.

[0013] It should be understood that when the annular turntable needs to be driven to rotate, the motor is started, the motor will drive the driving gear to rotate, and the driving gear will drive the annular turntable to rotate under the gear transmission of the follower teeth, thereby realizing the rotation adjustment of the annular turntable.

[0014] As a further embodiment of the present invention, the second drive assembly comprises: A support tube, the support tube is fixedly connected to the middle position of the top of the clamping platform and has a plurality of installation openings on the surface; A plurality of second support rods, wherein the plurality of second support rods are respectively fixedly connected to the inner walls of the plurality of mounting openings; A plurality of pairs of telescopic rods, wherein the plurality of pairs of telescopic rods are respectively connected to a plurality of inner clamping claws, and two telescopic rods in the same pair are fixedly connected between the inner clamping claws and the surface of the support tube; A plurality of linkage sleeves, wherein the plurality of linkage sleeves are respectively slidably sleeved on the surfaces of the plurality of second support rods, and are respectively rotatably connected with linkage rods between the plurality of inner clamping claws, and a movable plate is fixedly connected between the plurality of linkage sleeves; A first linkage component, the first linkage component is used to link the two auxiliary clamping jaws at the top of the inner clamping jaw to flip under the drive of the linkage rod; A linear drive unit is used to drive the moving plate to move in height.

[0015] The specific linear drive unit may be an electric cylinder, which is fixedly mounted on the top of the lower support, and a drive rod is fixedly connected to the telescopic end, and the drive rod sequentially penetrates the clamping table and the support tube and extends to the inside of the support tube and is fixedly connected to the moving plate; It should be understood that when the annular workpiece needs to be clamped in the center, the linear drive unit, i.e., the electric cylinder, is started. The electric cylinder pulls the movable plate through the drive rod, and the movable plate drives multiple linkage sleeves to descend synchronously. The multiple linkage sleeves push the inner clamping jaws to move through the linkage rod. The inner clamping jaws move outward under the support of the telescopic rod until they are against the inner ring surface of the annular workpiece. The synchronous movement and clamping of multiple inner clamping jaws realizes multi-directional synchronous clamping of the inner wall of the annular workpiece and the center alignment of the annular workpiece. Under the premise that the outer clamping jaws press the bottom end of the annular workpiece, the center clamping and positioning are performed, so that the entire annular workpiece remains in a stable state, ready for the next step of processing.

[0016] As a further embodiment of the present invention, the first linkage component comprises: A slider, wherein the slider is slidably connected to the surface of the inner clamping jaw and is rotatably connected to the linkage rod via a connecting rod; Two support shafts, the two support shafts are symmetrically connected to the top of the inner clamping jaws, one end of the two support shafts is fixedly connected to the two auxiliary clamping jaws respectively, and the other end is fixedly connected to the second linkage gear; Two second linkage racks are respectively meshed with the two second linkage gears and are respectively connected to two sides of the slider via second elastic support members.

[0017] It should be understood that in the process of the linkage rod pushing the inner clamp to move, the linkage rod will push the connecting rod to move, the connecting rod will pull the slider downward, and the slider will synchronously drive the two second linkage racks to move under the support of the second elastic support member, the two second linkage racks will transmit the second linkage gear to rotate, and the second linkage gear will synchronously drive the auxiliary clamp to flip under the drive of the support shaft, thereby increasing the clamping area of ​​the top end of the inner clamp, and in the process of the connecting rod continuing to pull the slider, the slider will gradually tighten the second linkage rack in the process of acting on the second elastic support member, and the second linkage rack will gradually be subjected to increasing pulling force, so as to achieve the goal of maintaining the flipping state of the auxiliary clamp and then gradually approaching the inner ring surface of the annular workpiece until it is tightly pressed, thereby first expanding the clamping area and then clamping and positioning.

[0018] It should be noted that when the clamping is cancelled, the inner ring surface of the annular workpiece will be left first, and then the auxiliary clamping jaws will be flipped and folded, so as to reduce the space occupied and provide space for the installation of the annular workpiece, which is conducive to avoiding bumps and damages.

[0019] As a further embodiment of the present invention, the second elastic support member comprises: Two connecting rods, the two supporting rods are respectively fixedly connected to the two sides of the sliding block, and are respectively slidably plugged with the second linkage racks at corresponding positions; Two second support springs are respectively sleeved on the surfaces of the two connecting rods, and two ends of the two second support springs are respectively fixedly connected to the ends of the connecting rods and the second linkage rack.

[0020] As a further embodiment of the present invention, it also includes: Two docking grooves, the two docking grooves are symmetrically arranged on the top of the inner clamping jaw; Two butt joint pins are respectively slidably inserted in two butt joint grooves and are respectively fixedly connected with two auxiliary clamping claws at the top end of the same first linkage rack.

[0021] As a further embodiment of the present invention, a slide rail is provided between the slider and the inner clamping jaw, the slide rail is fixedly connected to the surface of the inner clamping jaw, and the slider is slidably connected to the surface of the slide rail.

[0022] As a further embodiment of the present invention, the bottom ends of the plurality of inner clamping jaws are each provided with a pressing assembly, the pressing assembly being used to press the annular member at the bottom end of the inner part of the annular workpiece, and the pressing assembly comprises: Two linkage plates, the two linkage plates are symmetrically slidably connected to the two sides of the inner clamping jaw, and the tops of the two linkage plates are fixedly connected with circular tracks, and the bottoms of the two linkage plates are fixedly connected with abutment blocks; Two linkage pins, the two linkage pins are respectively slidably connected in the two circular tracks, and the ends are both rotatably connected to the connecting frames, the surfaces of the two connecting frames are fixedly connected with connecting shafts, and the two connecting shafts are respectively rotatably connected to the two sides of the inner clamping jaws; Two third linkage gears, the two third linkage gears are fixedly connected to the two connecting shafts respectively; Two third linkage racks, the two third linkage racks are respectively meshed with the two third linkage gears, and are respectively fixedly connected to the surfaces of the two second linkage racks. Compared with the prior art, the present invention has the following beneficial effects: The present invention drives multiple outer jaws to move through a first driving component. The outer jaws are first kept in an open state and flipped when approaching the annular workpiece. If the annular workpiece deviates from the central position, the outer jaws can be toggled during the flipping process to adjust the annular workpiece in the central direction and synchronously press multiple points of the lower end annular body of the annular workpiece to quickly achieve multi-point pressing and positioning of the annular workpiece. The synchronous movement and clamping of multiple inner jaws achieves multi-directional synchronous clamping of the inner wall of the annular workpiece and the central alignment of the annular workpiece. On the premise that the outer jaws press the bottom end of the annular workpiece, the central clamping and positioning are performed, so that the entire annular workpiece remains in a stable state and is ready for the next step of processing.

[0023] After the outer jaws complete clamping, the second drive assembly is started, and the second drive assembly synchronously drives multiple inner jaws to move outward synchronously until the annular workpiece is clamped. In the clamping process, the two auxiliary jaws are first adjusted to flip open, and then the inner jaws and the flipped open auxiliary jaws are driven to fit tightly against the inner ring wall of the annular workpiece, thereby achieving the centered clamping of the annular workpiece and the clamping and supporting of the inner wall of the tube body at the top of the annular workpiece near the upper flange ring. This helps to avoid unnecessary deformation of the top of the main body of the annular workpiece near the upper flange ring during the pressure shaping process of the upper flange ring.

[0024] The top end of the inner clamping jaw itself can already support the top end of the inner ring surface of the annular workpiece. The further clamping stability of the auxiliary clamping jaw is further increased, which will further increase the support for the top end of the inner ring surface of the annular workpiece, which is conducive to further avoiding the possibility of causing unnecessary joint deformation of the top end of the main body of the annular workpiece near the upper flange ring during the pressure shaping process of the upper flange ring.

[0025] By setting the pressure sensor, the clamping pressure of the outer clamp can be indirectly detected, which is beneficial to accurately apply pressure to the bottom end of the annular workpiece and maintain the stability of clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a structural cross-sectional view of the overall structure of the present invention.

[0028] Figure 3 for Figure 2 Enlarged view of part A.

[0029] Figure 4 It is a schematic structural diagram of the inner clamping jaw of the present invention.

[0030] Figure 5 It is a schematic structural diagram of the outer clamping jaw and the rotation driving unit of the present invention.

[0031] Figure 6 It is a structural cross-sectional view of the movable seat of the present invention.

[0032] Figure 7 It is a schematic structural diagram of the inner clamping jaw and the auxiliary clamping jaw of the present invention.

[0033] Figure 8 for Figure 7 Enlarged view of part B.

[0034] Fig. 9 It is a structural cross-sectional view of the annular workpiece of the present invention.

[0035] Fig.10 It is a schematic structural diagram of the auxiliary clamping jaw, the second linkage rack, the linkage plate and the stop block of the present invention.

[0036] Fig.11 for Fig.10 Enlarged view of part C.

[0037] Fig.12 It is a schematic structural diagram of the clamping table of the present invention.

[0038] In the figure: lower support 1, clamping table 2, outer clamping jaw 3, roller 4, inner clamping jaw 5, auxiliary clamping jaw 6, annular workpiece 7, upper flange ring 701, annular body 702, annular member 703, annular turntable 8, coil wire 9, mounting groove 10, moving seat 11, flip frame 12, first linkage gear 13, first linkage rack 14, pressure sensor 15, first support rod 16, first support spring 17, mounting port 18, follower gear 19, motor 20, drive gear 21, support tube 22 , second support rod 23, telescopic rod 24, linkage sleeve 25, linkage rod 26, movable plate 27, electric cylinder 28, driving rod 29, slider 30, connecting rod 31, support shaft 32, second linkage gear 33, second linkage rack 34, connecting rod 35, second support spring 36, docking groove 37, docking pin 38, slide rail 39, linkage plate 40, return track 41, stop block 42, linkage pin 43, connecting frame 44, connecting shaft 45, third linkage gear 46, third linkage rack 47. DETAILED DESCRIPTION

[0039] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0040] like Figures 1 to 12 The positioning and clamping device of a workpiece shaping device shown in the figure comprises a lower support 1 and a clamping table 2 fixedly connected to the lower support 1, and further comprises: A plurality of outer clamping jaws 3 are distributed in a circular array on the top of the clamping platform 2 and are slidably connected to the clamping platform 2. Rollers 4 are rotatably connected to the clamping surfaces of the outer clamping jaws 3. The first driving assembly is used to synchronously drive the four outer clamping jaws 3 to synchronously approach the bottom end of the annular workpiece 7, and in the process of approaching the workpiece, first keep the clamping jaws open, then flip and push the workpiece to move in the center direction, and then press it; A plurality of inner clamping jaws 5, which are arranged in an annular array inside the annular workpiece 7 and are all rotatably connected to two auxiliary clamping jaws 6 at the top; The second drive component is used to drive multiple inner jaws 5 to move outward synchronously after the outer jaws 3 are clamped and positioned until the annular workpiece 7 is clamped, and in the clamping process, first adjust the two auxiliary jaws 6 to flip open, and then drive the inner jaws 5 and the flipped open auxiliary jaws 6 to stick to the inner ring wall of the annular workpiece 7.

[0041] It should be understood that the annular workpiece 7 specifically includes an upper flange ring 701 and an annular body 702, and an annular member 703 is further connected to the inner bottom end. The upper flange ring 701 will be deformed under the action of cutting force and thermal effect during the forming process, and needs to be pressurized and leveled later. However, during the leveling process, due to the tubular shape of the annular workpiece 7 and the upper flange ring 701 being located at the top of the annular workpiece 7, when the flange ring 701 is pressurized and leveled, it is easy to cause a force on the main body of the annular workpiece 7 near the flange ring 701, which is not convenient for maintaining the stability of the shape of the annular workpiece 7 and is prone to deformation caused by unexplained connection. The present technical solution can solve the above problems, as follows: When installing the annular workpiece 7, the annular workpiece 7 is set at the top of the clamping table 2, and is located outside the multiple inner jaws 5 and between the multiple outer jaws 3. Then, the multiple outer jaws 3 are driven to move by the first driving component. The outer jaws 3 are kept in an open state first, and are turned over when approaching the annular workpiece 7. If the annular workpiece 7 deviates from the center position, the outer jaws 3 can be toggled during the turning process to adjust the annular workpiece 7 in the centering direction, and multiple points of the lower end annular body 702 of the annular workpiece 7 are pressed synchronously. Under the rolling support of the roller 4, the lateral movement of the annular workpiece 7 is not restricted. After the outer clamping jaws 3 have completed clamping, the second driving assembly is started, and the second driving assembly synchronously drives the multiple inner clamping jaws 5 to move outward synchronously until the annular workpiece 7 is tightened. In the clamping process, the two auxiliary clamping jaws 6 are first adjusted to flip open, and then the inner clamping jaws 5 and the flipped open auxiliary clamping jaws 6 are driven to close to the inner ring wall of the annular workpiece 7, so that the annular workpiece 7 is clamped in the center, and the inner wall of the tube body near the upper flange ring 701 at the top of the annular workpiece 7 is clamped and supported, which is conducive to avoiding unnecessary joint deformation of the main body top of the annular workpiece 7 near the upper flange ring 701 during the pressure shaping process of the upper flange ring 701; It should be further explained that the top of the inner clamp 5 itself can already support the top of the inner ring surface of the annular workpiece 7. The auxiliary clamp 6 further stabilizes the clamping and further increases the clamping area, which will further increase the support for the top of the inner ring surface of the annular workpiece 7, and is conducive to further avoiding the possibility of unnecessary deformation of the top of the main body of the annular workpiece 7 near the upper flange ring 701 during the pressure shaping process of the upper flange ring 701.

[0042] As a further embodiment of the present invention, the first drive assembly comprises: an annular turntable 8, the annular turntable 8 is rotatably connected to the bottom of the clamping platform 2; The coil wire 9 is fixedly connected to the top of the annular rotating disk 8; A plurality of mounting grooves 10 are provided on the top of the clamping platform 2, and a movable seat 11 is slidably connected on the inner wall, and the bottom end of the movable seat 11 is threadedly connected to the surface of the coil 9; A plurality of turning frames 12, the plurality of turning frames 12 are rotatably connected to the inside of the plurality of moving seats 11, and the surfaces of the turning frames 12 are fixedly connected with first linkage gears 13, and the ends of the turning frames 12 are fixedly connected to the plurality of outer clamps 3; A plurality of first linkage racks 14, wherein the plurality of first linkage racks 14 are respectively meshed with the bottom ends of the plurality of first linkage gears 13, and the ends are connected to the inner wall of the movable seat 11 at the corresponding positions through the first elastic support member, and the ends of the first linkage racks 14 are fixedly mounted with pressure sensors 15; The rotation driving unit is used to drive the annular turntable 8 to rotate.

[0043] It should be understood that after the annular workpiece 7 is placed, the annular turntable 8 is driven to rotate by the rotary drive unit, and the annular turntable 8 will threadably drive multiple moving seats 11 to synchronously approach the bottom end of the annular workpiece 7 through the coil wire 9 on the top. In the process of approaching, the end of the first linkage rack 14 will contact the inner wall of the mounting groove 10 for the first time, and the pressure sensor 15 will synchronously detect the pressure received. The first linkage rack 14 will compress the first elastic support member under the reaction of the inner wall of the mounting groove 10, and the first linkage gear 13 will move on the first linkage rack 14, and then flip over, and approach the annular workpiece 7 while flipping. If the annular workpiece 7 deviates from the clamping position, it will contact it before a part of the outer jaws 3, and the outer jaws 3 will flip while moving. During the process, the annular workpiece 7 is adjusted by toggling until the outer clamping jaw 3 is flipped and clamped. The outer clamping jaw 3 clamps the annular body 702 at the bottom end of the surface of the annular workpiece 7, and the clamping surface is in a rolling contact state. As the moving seat 11 continues to move, the force between the first linkage rack 14 and the mounting groove 10 continues to increase, that is, the contact extrusion force between the outer clamping jaw 3 and the top surface of the annular body 702 at the bottom end of the surface of the annular workpiece 7 is also increased synchronously. When the pressure detected by the pressure sensor 15 reaches the specified pressure, the rotation drive unit is controlled to stop driving, and the annular body 702 at the bottom end of the surface of the annular workpiece 7 is synchronously clamped and positioned at multiple positions. In addition, during the clamping process, the annular workpiece 7 is adjusted in the centering direction, which is convenient and quick. It should be noted that, by providing the pressure sensor 15 , the clamping pressure of the outer clamping jaw 3 can be indirectly detected, which is beneficial for accurately applying pressure to the bottom end of the annular workpiece 7 and maintaining the stability of the clamping.

[0044] As a further embodiment of the present invention, the first elastic support member comprises: Two first support rods 16 are fixedly connected to the inner wall of the moving seat 11, and are both inserted into the end of the first linkage rack 14. A first support spring 17 is sleeved on the surface of the two first support rods 16, and the two ends of the first support spring 17 are respectively fixedly connected to the first linkage rack 14 and the inner wall of the moving seat 11.

[0045] It should be understood that the first linkage rack 14 will squeeze the first support spring 17 under the reaction force of the inner wall of the mounting groove 10, but will be restricted and stopped as the moving seat 11 continues to move, thereby providing conditions for the relative movement of the first linkage rack 14 and the first linkage gear 13, thereby realizing the flip clamping of the linkage outer clamp 3.

[0046] As a further embodiment of the present invention, the rotary drive unit comprises: The follower teeth 19 are provided on the outer surface of the annular rotating disk 8; The motor 20 is fixedly connected to the bottom of the clamping platform 2 , and the output end of the motor 20 is fixedly connected to a driving gear 21 , and the driving gear 21 is meshed with the follower gear 19 .

[0047] It should be understood that when the annular turntable 8 needs to be driven to rotate, the motor 20 is started, the motor 20 will drive the driving gear 21 to rotate, and the driving gear 21 will drive the annular turntable 8 to rotate under the gear transmission of the follower tooth 19, thereby realizing the rotation adjustment of the annular turntable 8.

[0048] As a further embodiment of the present invention, the second drive assembly comprises: A support tube 22, the support tube 22 is fixedly connected to the middle position of the top of the clamping table 2, and a plurality of installation openings 18 are opened on the surface; A plurality of second support rods 23, wherein the plurality of second support rods 23 are respectively fixedly connected to the inner walls of the plurality of mounting openings 18; A plurality of pairs of telescopic rods 24, wherein the plurality of pairs of telescopic rods 24 are respectively connected to the plurality of inner clamping jaws 5, and two telescopic rods 24 in the same pair are fixedly connected between the inner clamping jaws 5 and the surface of the support tube 22; A plurality of linkage sleeves 25, the plurality of linkage sleeves 25 are respectively slidably sleeved on the surfaces of the plurality of second support rods 23, and are respectively rotatably connected with the plurality of inner clamping jaws 5 by linkage rods 26, and a movable plate 27 is fixedly connected between the plurality of linkage sleeves 25; A first linkage assembly, which is used to link the two auxiliary clamping jaws 6 at the top of the inner clamping jaw 5 to flip under the drive of the linkage rod 26; The linear drive unit is used to drive the moving plate 27 to move in height.

[0049] The specific linear drive unit can be an electric cylinder 28, which is fixedly mounted on the top of the lower support 1, and a drive rod 29 is fixedly connected to the telescopic end. The drive rod 29 passes through the clamping table 2 and the support tube in sequence and extends to the inside of the support tube 22 and is fixedly connected to the moving plate 27. It should be understood that when the annular workpiece 7 needs to be clamped in the center, the linear drive unit, that is, the electric cylinder 28, is started. The electric cylinder 28 pulls the movable plate 27 through the driving rod 29. The movable plate 27 simultaneously drives multiple linkage sleeves 25 to descend synchronously. The multiple linkage sleeves 25 push the inner clamping jaws 5 to move through the linkage rod 26. The inner clamping jaws 5 move outward under the support of the telescopic rod 24 until they are close to the inner ring surface of the annular workpiece 7. The synchronous movement and clamping of the multiple inner clamping jaws 5 realizes the multi-directional synchronous clamping of the inner wall of the annular workpiece 7 while realizing the center alignment of the annular workpiece 7. Under the premise that the outer clamping jaws 3 press the bottom end of the annular workpiece 7, the center clamping and positioning are performed, so that the entire annular workpiece 7 remains in a stable state, ready for the next step of processing.

[0050] As a further embodiment of the present invention, the first linkage component comprises: A slider 30, the slider 30 is slidably connected to the surface of the inner clamping jaw 5, and a connecting rod 31 is rotatably connected to the linkage rod 26; Two support shafts 32, the two support shafts 32 are symmetrically connected to the top of the inner clamping jaw 5, one end of the two support shafts 32 is fixedly connected to the two auxiliary clamping jaws 6 respectively, and the other end is fixedly connected to the second linkage gear 33; Two second linkage racks 34 are respectively meshed with the two second linkage gears 33 , and are respectively connected to two sides of the slider 30 via second elastic support members.

[0051] It should be understood that in the process of the linkage rod 26 pushing the inner clamp 5 to move, the linkage rod 26 will push the connecting rod 31 to move, and the connecting rod 31 will pull the slider 30 to move downward. The slider 30 will synchronously drive the two second linkage racks 34 to move under the support of the second elastic support member, and the two second linkage racks 34 will drive the second linkage gear 33 to rotate. The second linkage gear 33 will synchronously drive the auxiliary clamp 6 to flip under the drive of the support shaft 32, thereby increasing the clamping area at the top of the inner clamp 5, and in the process of the linkage rod 31 continuing to pull the slider 30, the slider 30 will gradually tighten the second linkage rack 34 in the process of acting on the second elastic support member, and the second linkage rack 34 will gradually be subjected to an increasing pulling force, so that after maintaining the flipping state of the auxiliary clamp 6, it will gradually approach the inner ring surface of the annular workpiece 7 until it is tightly pressed, thereby first expanding the clamping area and then performing clamping positioning.

[0052] It should be noted that when the clamping is cancelled, the inner surface of the annular workpiece 7 will be left first, and then the auxiliary clamping jaws 6 will be turned over and folded, so as to reduce the space occupied and provide space for the installation of the annular workpiece 7, which is conducive to avoiding bumps and damages.

[0053] As a further embodiment of the present invention, the second elastic support member comprises: Two connecting rods 35 and two supporting rods 16 are respectively fixedly connected to the two sides of the slider 30, and are respectively slidably plugged with the second linkage racks 34 at corresponding positions; Two second support springs 36 are respectively sleeved on the surfaces of the two connecting rods 35 , and two ends of the two second support springs 36 are respectively fixedly connected to the ends of the connecting rods 35 and the second linkage rack 34 .

[0054] It should be understood that the second linkage rack 34 is supported by the connection rod 35 and the second support spring 36 , and the second linkage rack 34 and the second linkage gear 33 are provided with a degree of freedom for relative movement.

[0055] As a further embodiment of the present invention, it also includes: Two docking grooves 37, the two docking grooves 37 are symmetrically opened on the top of the inner clamping jaw 5; Two docking pins 38 are respectively slidably inserted into two docking grooves 37 and are respectively fixedly connected to two auxiliary clamping claws 6 at the top end of the same first linkage rack 14 .

[0056] It should be understood that during the turning over of the auxiliary clamping jaw 6 , the docking pin 38 will dock with the docking groove 37 , forming a supporting point between the auxiliary clamping jaw 6 and the inner clamping jaw 5 .

[0057] As a further embodiment of the present invention, a slide rail 39 is provided between the slider 30 and the inner clamping jaw 5 , the slide rail 39 is fixedly connected to the surface of the inner clamping jaw 5 , and the slider 30 is slidably connected to the surface of the slide rail 39 .

[0058] It should be understood that by providing the slide rail 39 , the slider 30 is slidably connected to the inner clamping jaw 5 .

[0059] As a further embodiment of the present invention, the bottom ends of the plurality of inner clamping jaws 5 are provided with a pressing assembly, which is used to press the annular member 703 at the bottom end of the annular workpiece 7, and the pressing assembly includes: Two linkage plates 40, the two linkage plates 40 are symmetrically slidably connected to the two sides of the inner clamping jaw 5, and the tops of the two linkage plates 40 are fixedly connected with a circular track 41, and the bottoms of the two linkage plates 40 are fixedly connected with a stop block 42; Two linkage pins 43, the two linkage pins 43 are respectively slidably connected in the two return tracks 41, and the ends are rotatably connected to the connecting frames 44, the surfaces of the two connecting frames 44 are fixedly connected with connecting shafts 45, and the two connecting shafts 45 are respectively rotatably connected to the two sides of the inner clamping jaw 5; Two third linkage gears 46, the two third linkage gears 46 are respectively fixedly connected to the two connecting shafts 45; The two third linkage racks 47 are respectively meshed with the two third linkage gears 46 and are respectively fixedly connected to the surfaces of the two second linkage racks 34 . It should be understood that in the process of the slider 30 being pulled downward by the connecting rod 31, the slider 30 will pull the second linkage rack 34 through the second elastic support member, the second linkage rack 34 will synchronously push the third linkage rack 47, the third linkage rack 47 will transmit the third linkage gear 46, the third linkage gear 46 will drive the connecting frame 44 to flip through the connecting shaft 45, the connecting frame 44 acts on the return track 41 through the linkage pin 43, the return track 41 moves downward under the push of the linkage pin 43, and under the support of the linkage plate 40, drives the stop block 42 to be in a waiting state, and with the clamping of the inner clamp 5, the annular member 703 at the inner bottom end of the annular workpiece 7 is synchronously pressed, thereby realizing that in the process of clamping the inside of the annular workpiece 7, the inner bottom end of the annular workpiece 7 is pressed, further realizing the double-sided pressing of the bottom end of the annular workpiece 7, and further improving the stability.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A positioning and clamping device for a workpiece shaping device, comprising a lower support (1) and a clamping table (2) fixedly connected to the lower support (1), Features: Also includes: A plurality of outer clamping jaws (3), wherein the plurality of outer clamping jaws (3) are distributed in an annular array on the top of the clamping platform (2) and are slidably connected to the clamping platform (2), and rollers (4) are rotatably connected to the clamping surfaces of the outer clamping jaws (3); A first drive assembly, the first drive assembly is used to synchronously drive four outer clamping jaws (3) to synchronously approach the bottom end of the annular workpiece (7), and in the process of approaching the workpiece, first keep the clamping jaws open, then flip and push the workpiece to move in a centering direction, and then press it; A plurality of inner clamping jaws (5), wherein the plurality of inner clamping jaws (5) are distributed in an annular array inside the annular workpiece (7), and each inner clamping jaw (5) is rotatably connected to two auxiliary clamping jaws (6) at the top end; A second drive assembly, the second drive assembly is used to drive the plurality of inner clamps (5) to move outward synchronously after the outer clamps (3) are clamped and positioned, until the annular workpiece (7) is clamped, and during the clamping process, first adjust the two auxiliary clamps (6) to flip open, and then drive the inner clamps (5) and the flipped open auxiliary clamps (6) to adhere to the inner wall of the annular workpiece (7).

2. A positioning and clamping device for a workpiece shaping device according to claim 1, Features: The first driving assembly comprises: an annular turntable (8), the annular turntable (8) being rotatably connected to the bottom of the clamping platform (2); A coil wire (9), the coil wire (9) being fixedly connected to the top of the annular turntable (8); A plurality of mounting grooves (10), wherein the plurality of mounting grooves (10) are provided on the top of the clamping platform (2), and a movable seat (11) is slidably connected on the inner wall, and the bottom end of the movable seat (11) is threadedly connected to the surface of the coiled wire (9); A plurality of flip frames (12), the plurality of flip frames (12) being rotatably connected to the interior of the plurality of moving seats (11) respectively, and having a first linkage gear (13) fixedly connected to the surface thereof, and the ends of the plurality of flip frames (12) being fixedly connected to the plurality of outer clamping claws (3) respectively; a plurality of first linkage racks (14), the plurality of first linkage racks (14) being respectively meshed with the bottom ends of the plurality of first linkage gears (13), and the ends of the plurality of first linkage racks (14) being connected to the inner wall of the movable seat (11) at the corresponding position via a first elastic support member, and a pressure sensor (15) being fixedly mounted on the end of the first linkage rack (14); A rotation drive unit, wherein the rotation drive unit is used to drive the annular turntable (8) to rotate.

3. A positioning and clamping device for a workpiece shaping device according to claim 2, Features: The first elastic support member comprises: Two first support rods (16), the two first support rods (16) are fixedly connected to the inner wall of the movable seat (11), and are inserted through the end of the first linkage rack (14), and a first support spring (17) is sleeved on the surface of the two first support rods (16), and the two ends of the first support spring (17) are respectively fixedly connected to the first linkage rack (14) and the inner wall of the movable seat (11).

4. A positioning and clamping device for a workpiece shaping device according to claim 2, Features: The rotary drive unit comprises: Follower teeth (19), the follower teeth (19) being arranged on the outer annular surface of the annular rotating disk (8); A motor (20), the motor (20) is fixedly connected to the bottom of the clamping platform (2), and an output end is fixedly connected to a driving gear (21), the driving gear (21) is meshed with the follower gear (19).

5. The positioning and clamping device of a workpiece shaping device according to claim 1, Features: The second driving assembly comprises: A support tube (22), the support tube (22) being fixedly connected to a middle position on the top of the clamping platform (2) and having a plurality of installation openings (18) formed on its surface; a plurality of second support rods (23), wherein the plurality of second support rods (23) are respectively fixedly connected to the inner walls of the plurality of mounting openings (18); A plurality of pairs of telescopic rods (24), wherein the plurality of pairs of telescopic rods (24) are respectively connected to a plurality of inner clamping claws (5), and two telescopic rods (24) in the same pair are fixedly connected between the inner clamping claws (5) and the surface of the support tube (22); A plurality of linkage sleeves (25), the plurality of linkage sleeves (25) being slidably sleeved on the surfaces of the plurality of second support rods (23) and being rotatably connected to the plurality of inner clamping claws (5) by linkage rods (26), and a movable plate (27) being fixedly connected between the plurality of linkage sleeves (25); A first linkage component, the first linkage component is used to link the two auxiliary clamping jaws (6) at the top of the inner clamping jaw (5) to flip under the drive of the linkage rod (26); A linear drive unit, wherein the linear drive unit is used to drive the moving plate (27) to move in height.

6. A positioning and clamping device for a workpiece shaping device according to claim 5, Features: The first linkage component comprises: A slider (30), the slider (30) being slidably connected to the surface of the inner clamping jaw (5) and having a connecting rod (31) rotatably connected to the linkage rod (26); Two support shafts (32), the two support shafts (32) are symmetrically rotatably connected to the top of the inner clamping jaw (5), one end of the two support shafts (32) is fixedly connected to two auxiliary clamping jaws (6) respectively, and the other end is fixedly connected to the second linkage gear (33); Two second linkage racks (34), the two linkage racks are respectively meshed with the two second linkage gears (33), and are respectively connected to two sides of the slider (30) with a second elastic support member.

7. A positioning and clamping device for a workpiece shaping device according to claim 6, Features: The second elastic support member comprises: Two connecting rods (35), the two supporting rods (16) are respectively fixedly connected to the two sides of the sliding block (30), and are respectively slidably plugged with the second linkage racks (34) at corresponding positions; Two second support springs (36), the two second support springs (36) are respectively sleeved on the surfaces of the two connecting rods (35), and the two ends are respectively fixedly connected to the ends of the connecting rods (35) and the second linkage rack (34).

8. A positioning and clamping device for a workpiece shaping device according to claim 6, Features: Also includes: Two docking grooves (37), the two docking grooves (37) being symmetrically arranged on the top of the inner clamping jaw (5); Two docking pins (38), the two docking pins (38) are respectively slidably inserted into two docking grooves (37), and are respectively fixedly connected to two auxiliary clamping claws (6) at the top end of the same first linkage rack (14).

9. A positioning and clamping device for a workpiece shaping device according to claim 6, Features: A slide rail (39) is provided between the slide block (30) and the inner clamping jaw (5); the slide rail (39) is fixedly connected to the surface of the inner clamping jaw (5), and the slide block (30) is slidably connected to the surface of the slide rail (39).

10. A positioning and clamping device for workpiece shaping equipment according to claim 6, Features: The bottom ends of the plurality of inner clamping jaws (5) are each provided with a pressing assembly, the pressing assembly being used to press the annular member (703) at the bottom end of the inner part of the annular workpiece (7), the pressing assembly comprising: Two linkage plates (40), the two linkage plates (40) being symmetrically slidably connected to the two sides of the inner clamping jaw (5), and the tops of the two linkage plates are fixedly connected to a circular track (41), and the bottoms of the two linkage plates (40) are fixedly connected to a stop block (42); Two linkage pins (43), the two linkage pins (43) are respectively slidably connected in the two circular tracks (41), and the ends are both rotatably connected to the connecting frames (44), the surfaces of the two connecting frames (44) are both fixedly connected to connecting shafts (45), and the two connecting shafts (45) are respectively rotatably connected to the two sides of the inner clamping jaw (5); Two third linkage gears (46), the two third linkage gears (46) being fixedly connected to the two connecting shafts (45) respectively; Two third linkage racks (47), the two third linkage racks (47) are respectively meshed with the two third linkage gears (46), and are respectively fixedly connected to the surfaces of the two second linkage racks (34).

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