A multi-purpose elbow workpiece processing fixture

Abstract

The invention discloses a multi-purpose elbow workpiece processing fixture, which belongs to the field of processing fixtures, and comprises a main mounting plate, a sub-mounting plate, a first main clamping arm, a first sub-clamping arm, a second main clamping arm and a second sub-clamping arm. The first main clamping arm and the second main clamping arm are rotatably connected to the main mounting plate through a main rotating shaft, and the first sub-clamping arm and the second sub-clamping arm are rotatably connected to the sub-mounting plate through a sub-rotating shaft. The main mounting plate and the sub-mounting plate are driven to slide synchronously oppositely, so that the first main clamping plate on the first main clamping arm and the first sub-clamping plate on the first sub-clamping arm clamp the first end of the elbow oppositely, and the second main clamping plate on the second main clamping arm and the second sub-clamping plate on the second sub-clamping arm clamp the second end of the elbow oppositely. The processing fixture can be suitable for elbows with different pipe diameters, bending radii and bending angles, and the elbow can be driven to automatically flip through the double-acting cylinder on the main mounting plate, and the two ends of the elbow can be processed by clamping once.

Description

Technical Field

[0001] The invention relates to the field of processing fixtures, in particular to a multi-purpose elbow workpiece processing fixture. Background Art

[0002] At present, the milling, drilling and turning processes for elbow workpieces are usually for the two ends of the elbow. For example, the rotating elbow in the harvester conveying system needs to be milled and drilled at the end faces of its two ends, while the grooved fire elbow needs to be turned at its two ends. At the same time, there are many specifications and models of elbow workpieces, and the main model parameters involved are pipe diameter, bending radius, bending angle, etc. However, the fixture used for processing the elbow ends in the prior art is not universal, and it is difficult to clamp and fix elbow workpieces of different specifications and models through a set of fixtures and apply them to different processing techniques. In addition, after processing one end of the elbow workpiece, the elbow workpiece needs to be re-clamped to process the other end of the elbow workpiece, which is cumbersome. Summary of the invention

[0003] In response to the above technical problems, the present invention provides a multi-purpose elbow workpiece processing fixture, which is not only suitable for clamping and fixing elbow workpieces of different specifications and models for milling, drilling or turning, but also requires only one clamping operation to complete the processing of the two ends of the elbow workpiece.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] A multi-purpose elbow workpiece processing fixture, comprising a main mounting plate, a secondary mounting plate, a first main clamping arm, a first secondary clamping arm, a second main clamping arm and a second secondary clamping arm, wherein the main mounting plate and the secondary mounting plate have the same length direction and the two slide synchronously in opposite directions;

[0006] A rack is slidably connected to the main mounting plate along its length direction, and a double-acting cylinder for driving the rack to slide back and forth is fixedly mounted on the main mounting plate;

[0007] A main rotating shaft is fixedly connected to the first main clamping arm along the sliding direction of the main mounting plate, and the main rotating shaft is rotatably connected to the assembly end of the main mounting plate, a gear meshing with the rack is fixedly connected to the main rotating shaft, and a first main clamping plate is mounted on the first main clamping arm;

[0008] A secondary rotating shaft coaxial with the main rotating shaft is fixedly connected to the first secondary clamp arm, and the secondary rotating shaft is rotatably connected to the assembly end of the secondary mounting plate, and a first secondary clamp plate is mounted on the first secondary clamp arm;

[0009] The second main clamping arm is rotatably connected to the main rotating shaft, and a second main clamping plate is installed on the second main clamping arm;

[0010] The second secondary clamping arm is rotatably connected to the secondary rotating shaft, and a second secondary clamping plate is installed on the second secondary clamping arm;

[0011] The first main plate, the first auxiliary plate, the second main plate and the second auxiliary plate are respectively provided with V-shaped grooves for clamping the round neck of the elbow, the V-shaped grooves on the first main plate and the second main plate are opened toward the inner side of the main mounting plate, and the V-shaped grooves on the first auxiliary plate and the second auxiliary plate are opened toward the inner side of the auxiliary mounting plate, and the angle bisectors of each V-shaped groove coincide with the axes of the main rotating shaft and the auxiliary rotating shaft.

[0012] As a preferred technical solution, the double-acting cylinder is provided with a telescopic rod that is telescopic along the length direction of the main mounting plate, the telescopic stroke of the telescopic rod is constant, a pulling convex ring and a pushing convex ring are fixedly connected to the telescopic rod at intervals, a connecting plate is fixedly connected to the rack, the connecting plate is slidably arranged between the pulling convex ring and the pushing convex ring, a pushing spring is sleeved on the telescopic rod, and the pushing spring is arranged between the pushing convex ring and the connecting plate;

[0013] The assembly end of the main mounting plate is slidably connected with a lock pin along the length direction of the main mounting plate, and a push plate is fixedly connected to the lock pin, and the push plate corresponds to the axial direction of the telescopic rod. A separation spring is provided between the lock pin and the main mounting plate, and the separation spring presses the lock pin in the contraction direction of the telescopic rod;

[0014] A first stop pin is fixedly connected to one side of the first main clamping arm corresponding to the main mounting plate. When the telescopic rod is at its contraction limit position, the pulling convex ring tightens the connecting plate. At the same time, the angle bisector of the V-shaped groove on the first main clamping plate coincides with the length direction of the main mounting plate, and the first stop pin abuts against one side of the main mounting plate.

[0015] The second main clamping arm is fixedly connected with a second stop pin and a second boss on one side corresponding to the main mounting plate, and a locking hole is provided on the second boss. When the angle bisector of the V-shaped groove on the second main clamping plate coincides with the length direction of the main mounting plate, the second stop pin abuts against the other side of the main mounting plate, and the locking hole corresponds to the axial direction of the locking pin. When the telescopic rod is at its extension limit position, the telescopic rod presses the push plate to insert the locking pin into the locking hole.

[0016] As a preferred technical solution, a worm is connected to the first main clamping arm for vertical rotation along the main rotating shaft, and a worm wheel coaxial with the main rotating shaft is fixedly connected to the second main clamping arm, and the worm is meshed with the worm wheel.

[0017] As a preferred technical solution, an angle disc is fixedly provided on the first main clamping arm around the main rotating shaft, and a pointer is fixedly provided on the end face of the worm gear along its radial direction. The angle disc cooperates with the pointer to indicate the angle between the first main clamping arm and the second main clamping arm.

[0018] As a preferred technical solution, a first synchronization sleeve is fixedly connected to the first main clamp arm along the sliding direction of the main mounting plate, and a first synchronization rod is fixedly connected to the first auxiliary clamp arm along the sliding direction of the auxiliary mounting plate, and the first synchronization sleeve is slidably sleeved with the first synchronization rod;

[0019] A second synchronization sleeve is fixedly connected to the second main clamp arm along the sliding direction of the main mounting plate, and a second synchronization rod is fixedly connected to the second auxiliary clamp arm along the sliding direction of the auxiliary mounting plate. The second synchronization sleeve is slidably fitted with the second synchronization rod.

[0020] As a preferred technical solution, a first main sliding rod is fixedly connected to the first main clamping plate along the radial direction of the main rotating shaft, and the first main sliding rod is slidably connected to the first main clamping arm;

[0021] A first secondary sliding rod is fixedly connected to the first secondary clamping plate along the radial direction of the secondary rotating shaft, and the first secondary sliding rod is slidably connected to the first secondary clamping arm;

[0022] A second main sliding rod is fixedly connected to the second main clamping plate along the radial direction of the main rotating shaft, and the second main sliding rod is slidably connected to the second main clamping arm;

[0023] A second secondary sliding rod is fixedly connected to the second secondary clamping plate along the radial direction of the secondary rotating shaft, and the second secondary sliding rod is slidably connected to the second secondary clamping arm.

[0024] As a preferred technical solution, a first main screw for fastening the first main sliding rod is threadedly connected to the first main clamping arm;

[0025] The first secondary clamp arm is threadedly connected with a first secondary screw for fastening the first secondary sliding rod;

[0026] The second main clamping arm is threadedly connected with a second main screw for fastening the second main sliding rod;

[0027] The second secondary clamping arm is threadedly connected with a second secondary screw for fastening the second secondary sliding rod.

[0028] As a preferred technical solution, it also includes a two-jaw chuck, wherein the two jaws of the two-jaw chuck are distributed at 180° around the axis of the two-jaw chuck;

[0029] The mounting end of the main mounting plate is fixedly connected to one jaw of the two-jaw chuck, and the mounting end of the auxiliary mounting plate is fixedly connected to the other jaw of the two-jaw chuck. The length directions of the main mounting plate and the auxiliary mounting plate are consistent with the axial direction of the two-jaw chuck.

[0030] The V-shaped groove on the first main plate and the V-shaped groove on the first auxiliary plate are symmetrically distributed on both sides of the axial section of the two-jaw chuck, and the V-shaped groove on the second main plate and the V-shaped groove on the second auxiliary plate are symmetrically distributed on both sides of the axial section of the two-jaw chuck.

[0031] As a preferred technical solution, a positioning pin is slidably provided at the assembly end of the main mounting plate along the length direction of the main mounting plate, the positioning pin comprises a column, a ball head is fixedly provided at one end of the column, a limiting convex ring is fixedly provided on the column, a positioning spring is provided between the column and the main mounting plate, the positioning spring presses the column in the direction of the ball head, and the limiting convex ring cooperates with the main mounting plate to limit the sliding limit position of the ball head;

[0032] A first boss is fixedly connected to one side of the first main clamping arm corresponding to the main mounting plate, and a first ball socket is provided on the first boss. When the angle bisector of the V-shaped clamping groove on the first main clamping plate coincides with the length direction of the main mounting plate, the ball head engages with the first ball socket;

[0033] The second main clamping arm is fixedly connected with a second boss on one side corresponding to the main mounting plate, and a second ball socket is provided on the second boss. When the angle bisector of the V-shaped groove on the second main clamping plate coincides with the length direction of the main mounting plate, the ball head engages with the second ball socket.

[0034] As a preferred technical solution, the assembly end of the main mounting plate is slidably connected with a centrifugal block along the sliding direction of the main mounting plate, the centrifugal block is located at the end of the column away from the ball head, a return spring is provided between the centrifugal block and the main mounting plate, the return spring presses the centrifugal block toward the inner side of the main mounting plate, the centrifugal block is provided with an avoidance groove that cooperates with the column, and when the centrifugal block slides centrifugally, the avoidance groove is misaligned with the column to prevent the column from rebounding.

[0035] The present invention adopts the above technical solution, and has the following advantages compared with the prior art:

[0036] 1. Suitable for clamping elbows of different pipe diameters: the first main clamping plate on the first main clamping arm and the first auxiliary clamping plate on the first auxiliary clamping arm clamp the first end of the elbow, the second main clamping plate on the second main clamping arm and the second auxiliary clamping plate on the second auxiliary clamping arm clamp the second end of the elbow, and the V-shaped clamping grooves on the first main clamping plate, the first auxiliary clamping plate, the second main clamping plate and the second auxiliary clamping plate are used to automatically adapt to elbows of different pipe diameters, so that the first end and the second end of the elbow are automatically centered.

[0037] 2. Suitable for clamping elbows with different bending radii: the distances between the first main plate and the second main plate and the main rotating shaft are adjustable, and the distances between the first auxiliary plate and the second auxiliary plate and the auxiliary rotating shaft are adjustable. When dealing with elbows with different bending radii, the first main plate and the first auxiliary plate can clamp the first end of the elbow while the second main plate and the second auxiliary plate can clamp the second end of the elbow.

[0038] 3. Suitable for clamping elbows with different bending angles: by rotating the worm on the first main clamp arm to drive the worm gear on the second main clamp arm to rotate, the angle between the first main clamp arm and the second main clamp arm can be easily adjusted to match the bending angle of the elbow. At the same time, the first main clamp arm limits the position of the first auxiliary clamp arm through the first synchronous sleeve and the first synchronous rod, and the second main clamp arm limits the position of the second auxiliary clamp arm through the second synchronous sleeve and the second synchronous rod, so that the angle between the first auxiliary clamp arm and the second auxiliary clamp arm changes automatically.

[0039] 4. Suitable for a variety of processing techniques: The main mounting plate and auxiliary mounting plate in the processing fixture can be slidably mounted on the workbench of a milling machine or a drilling machine for milling or drilling processing, or can be installed on the spindle of a lathe through an additional two-jaw chuck for turning processing.

[0040] 5. Automatic flipping function: By controlling the contraction or extension of the telescopic rod on the double-acting cylinder, the first end or the second end of the elbow can be automatically flipped to the processing station, and the first main clamping arm or the second main clamping arm can be automatically locked. Therefore, the two ends of the elbow can be processed through one clamping operation. It is particularly important to note that the stroke of the telescopic rod on the double-acting cylinder does not need to be adjusted. Regardless of how the bending angle of the elbow changes, this function can be automatically realized. In order to cope with the danger of turning processing, the processing fixture is also provided with a safety mechanism, which can prevent the locking effect of the first main clamping arm or the second main clamping arm from failing, thereby ensuring processing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of a multi-purpose elbow workpiece processing fixture in the present invention;

[0042] Figure 2 for Figure 1 Structural diagram of the middle main mounting plate;

[0043] Figure 3 for Figure 1 A schematic diagram of the assembly structure of the first main clamping arm, the first auxiliary clamping arm, the second main clamping arm and the second auxiliary clamping arm;

[0044] Figure 4 for Figure 3 A schematic diagram of the structure of the first main clamping arm;

[0045] Figure 5 for Figure 3 A schematic diagram of the structure of the first auxiliary clamp arm;

[0046] Figure 6 for Figure 3 A schematic diagram of the structure of the second main clamping arm;

[0047] Figure 7 for Figure 3 A schematic diagram of the structure of the second auxiliary clamping arm;

[0048] Figure 8 for Figure 1 One of the clamping states of a multi-purpose elbow workpiece processing fixture;

[0049] Fig. 9 for Figure 8 a cross-sectional view of the middle main mounting plate and the first main clamping arm;

[0050] Fig.10 for Figure 1 The second clamping state of a multi-purpose elbow workpiece processing fixture;

[0051] Fig.11 for Fig.10 Cross-sectional view of the middle main mounting plate and the second main clamping arm.

[0052] In the figure,

[0053] 100-two-jaw chuck;

[0054] 200-main mounting plate; 201-double-acting cylinder; 202-telescopic rod; 2021-pull convex ring; 2022-push convex ring; 203-push spring; 204-rack; 2041-connecting plate; 205-locking pin; 2051-push plate; 206-separation spring; 207-locating pin; 2071-column; 2072-ball head; 2073-limiting convex ring; 208-locating spring; 209-centrifugal block; 2091-avoidance groove; 210-reset spring;

[0055] 300-pair mounting plate;

[0056] 400-first main clamping arm; 401-first main sliding rod; 402-first main clamping plate; 403-first main screw; 404-main rotating shaft; 405-worm; 406-angle disc; 407-first synchronous sleeve; 408-gear; 409-first stop pin; 410-first boss; 4101-first ball socket;

[0057] 500-first secondary clamping arm; 501-first secondary sliding rod; 502-first secondary clamping plate; 503-first secondary screw; 504-secondary rotating shaft; 505-first synchronous rod;

[0058] 600-second main clamp arm; 601-second main slide bar; 602-second main clamp plate; 603-second main screw; 604-worm gear; 6041-pointer; 605-second synchronous sleeve; 606-second stop pin; 607-second boss; 6071-locking hole; 6072-second ball socket;

[0059] 700 - second secondary clamping arm; 701 - second secondary sliding rod; 702 - second secondary clamping plate; 703 - second secondary screw; 704 - second synchronization rod;

[0060] 800 - elbow; 801 - first end; 802 - second end. DETAILED DESCRIPTION

[0061] The specific implementation methods of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0062] Embodiment 1:

[0063] like Figure 1-Figure 11 As shown, a multi-purpose elbow workpiece processing fixture is used to clamp the elbow 800 and perform milling or drilling on the first end 801 and the second end 802 of the elbow 800, including a main mounting plate 200, a sub-mounting plate 300, a first main clamping arm 400, a first sub-clamping arm 500, a second main clamping arm 600 and a second sub-clamping arm 700. The length direction of the main mounting plate 200 and the sub-mounting plate 300 are consistent, one end of both is the mounting end, and the other end is the assembly end. The main mounting plate 200 and the sub-mounting plate 300 slide synchronously in opposite directions under the drive of the driving mechanism. In the prior art, there are many driving mechanisms that can achieve this functional requirement, which are not limited here.

[0064] A double-acting cylinder 201 is fixedly mounted on the main mounting plate 200. The double-acting cylinder 201 is provided with a telescopic rod 202 that is telescopic along the length direction of the main mounting plate 200. The telescopic stroke of the telescopic rod 202 is constant. A pulling convex ring 2021 and a pushing convex ring 2022 are fixedly connected to the telescopic rod 202 at intervals. The pulling convex ring 2021 is close to the assembly end of the main mounting plate 200, and the pushing convex ring 2022 is close to the installation end of the column mounting plate. A rack 204 is slidably connected in the length direction, and a connecting plate 2041 is fixedly connected to the rack 204. The connecting plate 2041 is slidably connected to the telescopic rod 202, and the connecting plate 2041 is located between the pulling convex ring 2021 and the pushing convex ring 2022. A pushing spring 203 is sleeved on the telescopic rod 202, and the pushing spring 203 is set between the pushing convex ring 2022 and the connecting plate 2041. When the telescopic rod 202 is retracted, the pulling convex ring 2021 is used to pull the connecting plate 204 1, the rack 204 is oriented to slide toward the mounting end of the main mounting plate 200. When the telescopic rod 202 is extended, the push spring 203 is used to push the connecting plate 2041, so that the rack 204 is oriented to slide toward the assembly end of the main mounting plate 200. The assembly end of the main mounting plate 200 is connected to the locking pin 205 by sliding along the length direction of the main mounting plate 200. The locking pin 205 is fixedly connected to the pushing plate 2051. The pushing plate 2051 corresponds to the axial direction of the telescopic rod 202. The locking pin 205 is oriented to the main mounting plate 200. A separation spring 206 is provided between the mounting plates 200, and the separation spring 206 presses the locking pin 205 in the contraction direction of the telescopic rod 202. When the telescopic rod 202 is at its extension limit position, it can press the push plate 2051, so that the locking pin 205 slides in the extension direction of the telescopic rod 202. When the telescopic rod 202 is at its contraction limit position, it separates from the push plate 2051, so that the locking pin 205 slides and resets in the contraction direction of the telescopic rod 202 under the elastic action of the separation spring 206.

[0065] The first main clamping arm 400 is arranged on the inner side of the main mounting plate 200, and a main rotating shaft 404 is fixedly connected to the first main clamping arm 400 along the sliding direction of the main mounting plate 200, and the main rotating shaft 404 is rotatably connected to the assembly end of the main mounting plate 200, and a gear 408 meshing with the rack 204 is fixedly connected to the main rotating shaft 404, and a first main sliding rod 401 is slidably connected to the first main clamping arm 400 along the radial direction of the main rotating shaft 404, and a first main screw 403 for fastening the first main sliding rod 401 is threadedly connected to the first main clamping arm 400, and one end of the first main sliding rod 401 is fixedly connected to the first main clamping plate 402, and the first main clamping plate 402 is provided with an opening facing the inner side of the main mounting plate 200. The V-shaped groove of the first main clamping plate 402 coincides with the axis of the main rotating shaft 404. The outer side of the first main clamping arm 400 is fixedly connected with a first stop pin 409, and the first stop pin 409 is located on one side of the main mounting plate 200. The first stop pin 409 cooperates with the main mounting plate 200 to limit the swing range of the first main clamping arm 400 to one side of the main mounting plate 200. The first main clamping arm 400 is connected with a worm gear 405 for vertical rotation along the main rotating shaft 404. The first main clamping arm 400 is fixedly provided with an angle disc 406 around the main rotating shaft 404. The first main clamping arm 400 is fixedly connected with a first synchronous sleeve 407 along the sliding direction of the main mounting plate 200.

[0066] The first auxiliary clamping arm 500 is arranged on the inner side of the auxiliary mounting plate 300, and a secondary rotating shaft 504 is fixedly connected to the first auxiliary clamping arm 500, and the secondary rotating shaft 504 is rotatably connected to the assembly end of the auxiliary mounting plate 300, and a first auxiliary sliding rod 501 is slidably connected to the first auxiliary clamping arm 500 along the radial direction of the secondary rotating shaft 504, and a first auxiliary screw 503 for fastening the first auxiliary sliding rod 501 is threadedly connected to the first auxiliary clamping arm 500, and one end of the first auxiliary sliding rod 501 is fixedly connected to the first auxiliary clamping plate 502, and the first auxiliary clamping plate 502 is provided with a V-shaped groove opening toward the inner side of the auxiliary mounting plate 300, and the angle bisector of the V-shaped groove on the first auxiliary clamping plate 502 coincides with the axis of the secondary rotating shaft 504, and a first synchronization rod 505 is fixedly connected to the first auxiliary clamping arm 500 along the sliding direction of the auxiliary mounting plate 300.

[0067] The second main clamp arm 600 is arranged on the inner side of the main mounting plate 200, and a worm gear 604 coaxial with the main rotating shaft 404 is fixedly connected to the second main clamp arm 600, and a pointer 6041 is fixedly arranged on the end surface of the worm gear 604 along its radial direction, and a second main slide bar 601 is slidably connected to the radial direction of the main rotating shaft 404 on the second main clamp arm 600, and a second main screw 603 for fastening the second main slide bar 601 is threadedly connected to the second main clamp arm 600, and one end of the second main slide bar 601 is fixedly connected to the second main clamp plate 602, and the second main clamp plate 602 is provided with a second main screw 603 facing the main mounting plate 200. 00 has a V-shaped groove opened on the inner side, and the angle bisector of the V-shaped groove on the second main clamping plate 602 coincides with the axis of the main rotating shaft 404. The outer side of the second main clamping arm 600 is fixedly connected with a second stop pin 606 and a second boss 607. The second stop pin 606 cooperates with the main mounting plate 200 to limit the swing range of the second main clamping arm 600 to the other side of the main mounting plate 200. A locking hole 6071 is provided on the second boss 607 along the radial direction of the main rotating shaft 404. The second main clamping arm 600 is fixedly connected with a second synchronization sleeve 605 along the sliding direction of the main mounting plate 200.

[0068] The second auxiliary clamping arm 700 is arranged on the inner side of the auxiliary mounting plate 300 and is rotatably connected to the auxiliary rotating shaft 504. A second auxiliary sliding rod 701 is radially slidably connected to the second auxiliary clamping arm 700 along the auxiliary rotating shaft 504. A second auxiliary screw 703 for fastening the second auxiliary sliding rod 701 is threadedly connected to the second auxiliary clamping arm 700. One end of the second auxiliary sliding rod 701 is fixedly connected to the second auxiliary clamping plate 702. The second auxiliary clamping plate 702 is provided with a V-shaped groove opening toward the inner side of the auxiliary mounting plate 300. The angle bisector of the V-shaped groove on the second auxiliary clamping plate 702 coincides with the axis of the auxiliary rotating shaft 504. A second synchronization rod 704 is fixedly connected to the second auxiliary clamping arm 700 along the sliding direction of the auxiliary mounting plate 300.

[0069] like Figure 3As shown, in the assembled state, the main rotating shaft 404 and the auxiliary rotating shaft 504 are coaxially arranged, the first synchronous sleeve 407 and the first synchronous rod 505 are slidably fitted, so that the first main clamping arm 400 and the first auxiliary clamping arm 500 swing synchronously, and the V-shaped groove on the first main clamping plate 402 is always symmetrical with the V-shaped groove on the first auxiliary clamping plate 502, which is used to clamp the round neck position of the first end portion 801 on the elbow 800 in opposite directions. The V-shaped grooves on the first main clamping plate 402 and the first auxiliary clamping plate 502 are suitable for clamping the first end portion 801 of the elbow 800 with different diameters, and can automatically center the axis of the first end portion 801 on the elbow 800 between the first main clamping plate 402 and the first auxiliary clamping plate 502. The second synchronous sleeve 605 and the second synchronous rod 704 are slidably fitted, so that the second main clamping arm 600 and the second auxiliary clamping arm 70 0 swings synchronously, and the V-shaped groove on the second main plate 602 is always symmetrical with the V-shaped groove on the second sub-plate 702, which is used to clamp the round neck part of the second end portion 802 of the elbow 800 in opposite directions. The V-shaped grooves on the second main plate 602 and the second sub-plate 702 are suitable for clamping the second end portions 802 of elbows 800 with different diameters, and can make the axis of the second end portion 802 of the elbow 800 automatically centered between the second main plate 602 and the second sub-plate 702. By adjusting the distance between the first main plate 402 and the main rotating shaft 404, the distance between the first sub-plate 502 and the sub-rotating shaft 504, the distance between the second main plate 602 and the main rotating shaft 404, and the distance between the second sub-plate 702 and the sub-rotating shaft 504, the processing fixture can be suitable for clamping elbows 800 with different bending radii.

[0070] At the same time, the second main clamping arm 600 is rotatably connected to the main rotating shaft 404 through the worm gear 604, and the worm gear 604 is engaged with the worm 405 on the first main clamping arm 400. By rotating the worm gear 405 to drive the worm gear 604 to rotate, the angle between the first main clamping arm 400 and the second main clamping arm 600 can be adjusted, so that the processing fixture can be suitable for clamping elbows 800 with different bending angles, and the one-way locking characteristics of the worm 405 and the worm gear 604 can be used to keep the angle between the first main clamping arm 400 and the second main clamping arm 600 stable. During the adjustment process, the angle dial 406 cooperates with the pointer 6041 to intuitively display the angle value between the first main clamping arm 400 and the second main clamping arm 600, and the angle between the first auxiliary clamping arm 500 and the second auxiliary clamping arm 700 changes accordingly.

[0071] The working principle is as follows: the main mounting plate 200 and the auxiliary mounting plate 300 are slidably mounted on the workbench of the milling machine or drilling machine, so that the length direction of the main mounting plate 200 and the auxiliary mounting plate 300 are perpendicular to the workbench of the milling machine or drilling machine, the elbow 800 is placed between the main mounting plate 200 and the auxiliary mounting plate 300, and the main mounting plate 200 and the auxiliary mounting plate 300 are driven to approach each other by the driving mechanism, and the round neck position of the first end 801 of the elbow 800 is clamped by the V-shaped grooves on the first main splint 402 and the first auxiliary splint 502, and the round neck position of the second end 802 of the elbow 800 is clamped by the V-shaped grooves on the second main splint 602 and the second auxiliary splint 702, and the double-acting cylinder 201 is controlled to drive the telescopic rod 202 to gradually retract, and the pulling convex ring 2021 on the telescopic rod 202 pulls the connecting plate 2041, so that the rack 204 gradually moves The telescopic rod 202 slides in the contraction direction, and the rack 204 drives the gear 408 on the main rotating shaft 404 to rotate, so that the first main clamping arm 400 gradually swings in the direction close to the main mounting plate 200. Until the telescopic rod 202 reaches its contraction limit position, the convex ring 2021 is pulled to tighten the connecting plate 2041, so that the first main clamping arm 400 cannot swing backward. At the same time, the first stop pin 409 on the first main clamping arm 400 abuts against one side of the main mounting plate 200, so that the first main clamping arm 400 cannot swing forward, thereby locking the swing position of the first main clamping arm 400. At this time, the angle bisector of the V-shaped groove on the first main clamping plate 402 coincides with the length direction of the main mounting plate 200, that is, the end face of the first end portion 801 on the elbow 800 is parallel to the work table of the milling machine or drilling machine. Start the milling machine or drilling machine to mill or drill the first end portion 801 of the elbow 800.

[0072] After the first end 801 of the elbow 800 is processed, the double-acting cylinder 201 is controlled to drive the telescopic rod 202 to gradually extend, and the pushing convex ring 2022 on the telescopic rod 202 pushes the pushing spring 203, and then the pushing spring 203 pushes the connecting plate 2041, so that the rack 204 gradually slides in the extension direction of the telescopic rod 202, and the rack 204 drives the gear 408 on the main rotating shaft 404 to reverse, so that the second main clamping arm 600 gradually swings in the direction close to the main mounting plate 200. In this process, the second stop pin 606 on the second main clamping arm 600 first abuts against the other side of the main mounting plate 200, so that the angle bisector of the V-shaped groove on the second main clamping plate 602 coincides with the length direction of the main mounting plate 200. , that is, the end surface of the second end portion 802 on the elbow 800 is parallel to the working table of the milling machine or the drilling machine. At this time, the second boss 607 swings to the top of the assembly end of the main mounting plate 200, and the locking hole 6071 on the second boss 607 corresponds axially to the locking pin 205 on the main mounting plate 200. The telescopic rod 202 continues to extend. When the telescopic rod 202 contacts the push plate 2051 on the locking pin 205, the locking pin 205 is pushed to gradually insert into the locking hole 6071 until the telescopic rod 202 reaches its extension limit. The locking pin 205 is tightly inserted into the locking hole 6071, thereby locking the swing position of the second main clamping arm 600, and the milling machine or the drilling machine is started again to perform milling or drilling on the second end portion 802 of the elbow 800.

[0073] Embodiment 2:

[0074] A multi-purpose elbow workpiece processing fixture is used to clamp the elbow 800 and turn the first end 801 and the second end 802 of the elbow 800. The driving mechanism described in the first embodiment is set as a two-jaw chuck 100. The two jaws on the two-jaw chuck 100 are distributed 180° around the axis of the two-jaw chuck 100. The mounting end of the main mounting plate 200 is fixedly connected to one jaw of the two-jaw chuck 100, and the mounting end of the auxiliary mounting plate 300 is fixedly connected to the other jaw of the two-jaw chuck 100, so that the length direction of the main mounting plate 200 and the auxiliary mounting plate 300 is consistent with the axial direction of the two-jaw chuck 100. The sliding direction of the mounting plate 200 and the auxiliary mounting plate 300 is the radial direction of the two-jaw chuck 100. The V-shaped groove on the first main clamping plate 402 and the V-shaped groove on the first auxiliary clamping plate 502 are symmetrically distributed on both sides of the axial section of the two-jaw chuck 100. The V-shaped groove on the second main clamping plate 602 and the V-shaped groove on the second auxiliary clamping plate 702 are symmetrically distributed on both sides of the axial section of the two-jaw chuck 100. The two clamping claws on the two-jaw chuck 100 are used to drive the main mounting plate 200 and the auxiliary mounting plate 300 to slide synchronously in opposite directions to clamp the elbow 800. The working principle of the two-jaw chuck 100 is the existing technology, and its composition structure and working principle are not repeated here.

[0075] When in use, the two-jaw chuck 100 is coaxially installed on the main shaft of the lathe. When the telescopic rod 202 is in its contraction limit position, the swing angle of the first main clamping arm 400 is locked, so that the axis of the first end 801 on the elbow 800 coincides with the axis of the lathe main shaft. At this time, the lathe is started, and the processing fixture is driven to rotate by the lathe main shaft and the first end 801 of the elbow 800 is driven to rotate, so that the first end 801 of the elbow 800 can be turned. When the telescopic rod 202 is in its extension limit position, the swing angle of the second main clamping arm 600 is locked, so that the axis of the second end 802 on the elbow 800 coincides with the axis of the lathe main shaft. At this time, the lathe is started, and the processing fixture is driven to rotate by the lathe main shaft and the second end 802 of the elbow 800 is driven to rotate, so that the second end 802 of the elbow 800 can be turned.

[0076] Furthermore, in order to prevent the locking action of the first main clamping arm 400 or the second main clamping arm 600 from failing during the turning process (for example, problems such as unstable air source pressure), resulting in the elbow 800 swinging and hitting the turning tool, the processing fixture is also provided with a safety mechanism. Specifically, a positioning pin 207 is provided at the assembly end of the main mounting plate 200 which slides along the length direction of the main mounting plate 200. The positioning pin 207 includes a column 2071, a ball head 2072 is fixedly provided at one end of the column 2071, a limiting convex ring 2073 is fixedly provided on the column 2071, and a positioning spring 208 is provided between the column 2071 and the main mounting plate 200. The positioning spring 208 presses the column 2071 toward the ball head 2072, so that the ball head 2072 elastically protrudes from the assembly end face of the main mounting plate 200. 073 cooperates with the main mounting plate 200 to limit the sliding limit position of the ball head 2072 so that the column 2071 cannot protrude from the assembly end surface of the main mounting plate 200. The assembly end of the main mounting plate 200 is slidably connected with a centrifugal block 209 along the sliding direction of the main mounting plate 200 (i.e., the radial direction of the two-jaw chuck 100). The centrifugal block 209 is located at the end of the column 2071 away from the ball head 2072. A return spring 210 is provided between the centrifugal block 209 and the main mounting plate 200. The return spring 210 presses the centrifugal block 209 toward the inner side of the main mounting plate 200. The centrifugal block 209 is provided with an avoidance groove 2091 that cooperates with the column 2071. The outer side of the first main clamping arm 400 is fixedly connected with a first boss 410, and the first boss 410 is provided with a first ball socket 4101, and the second boss 607 on the second main clamping arm 600 is provided with a second ball socket 6072.

[0077] When the lathe is not started, the centrifugal block 209 is pressed at its proximal sliding limit position under the elastic action of the return spring 210, and the avoidance groove 2091 thereon corresponds to the column 2071 on the locating pin 207, so that the locating pin 207 can slide freely, and the ball head 2072 on the locating pin 207 can elastically avoid the first boss 410 and the second boss 607. When turning the first end 801 of the elbow 800, the angle bisector plane of the V-shaped groove on the first main splint 402 coincides with the length direction of the main mounting plate 200, and the ball head 2072 on the locating pin 207 engages with the first ball socket 4101 on the first boss 410. As the lathe spindle drives the processing fixture to rotate, the centrifugal block 209 slides centrifugally under the action of centrifugal force, so that the avoidance groove 2091 thereon corresponds to the column 2071 on the locating pin 207 1 is misaligned, the ball head 2072 on the fixed outer pin cannot rebound, and is automatically locked with the first ball socket 4101 on the first boss 410, thereby preventing the first main clamping arm 400 from swinging. When the second end 802 of the elbow 800 is turned, the angle bisector of the V-shaped groove on the second main clamping plate 602 coincides with the length direction of the main mounting plate 200, and the ball head 2072 on the locating pin 207 is engaged with the second ball socket 6072 on the second boss 607. As the lathe spindle drives the processing fixture to rotate, the centrifugal block 209 slides centrifugally under the action of centrifugal force, so that the avoidance groove 2091 thereon is misaligned with the column 2071 on the locating pin 207, and the ball head 2072 on the fixed outer pin cannot rebound, and is automatically locked with the second ball socket 6072 on the second boss 607, thereby preventing the second main clamping arm 600 from swinging.

[0078] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A multi-purpose elbow workpiece processing fixture, characterized by: The invention comprises a main mounting plate (200), a secondary mounting plate (300), a first main clamping arm (400), a first secondary clamping arm (500), a second main clamping arm (600) and a second secondary clamping arm (700); the main mounting plate (200) and the secondary mounting plate (300) have the same length direction and the two slide synchronously in opposite directions; A rack (204) is slidably connected to the main mounting plate (200) along its length direction, and a double-acting cylinder (201) is fixedly mounted on the main mounting plate (200) for driving the rack (204) to slide back and forth; A main rotating shaft (404) is fixedly connected to the first main clamping arm (400) along the sliding direction of the main mounting plate (200), and the main rotating shaft (404) is rotatably connected to the assembly end of the main mounting plate (200), and a gear (408) meshing with the rack (204) is fixedly connected to the main rotating shaft (404), and a first main clamping plate (402) is installed on the first main clamping arm (400); A secondary rotating shaft (504) coaxial with the main rotating shaft (404) is fixedly connected to the first secondary clamp arm (500), and the secondary rotating shaft (504) is rotatably connected to the assembly end of the secondary mounting plate (300), and a first secondary clamp plate (502) is mounted on the first secondary clamp arm (500); The second main clamping arm (600) is rotatably connected to the main rotating shaft (404), and a second main clamping plate (602) is installed on the second main clamping arm (600); The second auxiliary clamping arm (700) is rotatably connected to the auxiliary rotating shaft (504), and a second auxiliary clamping plate (702) is installed on the second auxiliary clamping arm (700); The first main plate (402), the first auxiliary plate (502), the second main plate (602) and the second auxiliary plate (702) are respectively provided with V-shaped grooves for clamping the round neck of the elbow. The openings of the V-shaped grooves on the first main plate (402) and the second main plate (602) are oriented toward the inner side of the main mounting plate (200). The openings of the V-shaped grooves on the first auxiliary plate (502) and the second auxiliary plate (702) are oriented toward the inner side of the auxiliary mounting plate (300). The angle bisectors of the V-shaped grooves coincide with the axes of the main rotating shaft (404) and the auxiliary rotating shaft (504).

2. A multi-purpose elbow workpiece processing fixture according to claim 1, characterized in that: The double-acting cylinder (201) is provided with a telescopic rod (202) that is telescopic along the length direction of the main mounting plate (200), the telescopic stroke of the telescopic rod (202) is constant, a pulling convex ring (2021) and a pushing convex ring (2022) are fixedly connected to the telescopic rod (202) at intervals, a connecting plate (2041) is fixedly connected to the rack (204), the connecting plate (2041) is slidably arranged between the pulling convex ring (2021) and the pushing convex ring (2022), a pushing spring (203) is sleeved on the telescopic rod (202), and the pushing spring (203) is arranged between the pushing convex ring (2022) and the connecting plate (2041); The assembly end of the main mounting plate (200) is slidably connected to a lock pin (205) along the length direction of the main mounting plate (200); a push plate (2051) is fixedly connected to the lock pin (205); the push plate (2051) corresponds to the telescopic rod (202) in the axial direction; a separation spring (206) is provided between the lock pin (205) and the main mounting plate (200); the separation spring (206) presses the lock pin (205) in the contraction direction of the telescopic rod (202); A first stop pin (409) is fixedly connected to one side of the first main clamping arm (400) corresponding to the main mounting plate (200); when the telescopic rod (202) is in its contraction limit position, the pulling convex ring (2021) tightens the connecting plate (2041); and at the same time, the angle bisector of the V-shaped groove on the first main clamping plate (402) coincides with the length direction of the main mounting plate (200), and the first stop pin (409) abuts against one side of the main mounting plate (200); The second main clamping arm (600) is fixedly connected to a second stop pin (606) and a second boss (607) on one side corresponding to the main mounting plate (200); the second boss (607) is provided with a locking hole (6071); when the angle bisector of the V-shaped groove on the second main clamping plate (602) coincides with the length direction of the main mounting plate (200), the second stop pin (606) abuts against the other side of the main mounting plate (200), and the locking hole (6071) corresponds axially to the locking pin (205); when the telescopic rod (202) is at its extension limit position, the telescopic rod (202) presses the push plate (2051) to allow the locking pin (205) to be inserted into the locking hole (6071).

3. The multi-purpose elbow workpiece processing fixture according to claim 1 is characterized in that: The first main clamping arm (400) is connected to a worm (405) for vertical rotation along the main rotating shaft (404), and the second main clamping arm (600) is fixedly connected to a worm wheel (604) coaxial with the main rotating shaft (404), and the worm (405) is meshed with the worm wheel (604).

4. The multi-purpose elbow workpiece processing fixture according to claim 3 is characterized in that: An angle disc (406) is fixedly provided on the first main clamping arm (400) around the main rotating shaft (404), and a pointer (6041) is fixedly provided on the end surface of the worm gear (604) along its radial direction. The angle disc (406) cooperates with the pointer (6041) to indicate the angle between the first main clamping arm (400) and the second main clamping arm (600).

5. The multi-purpose elbow workpiece processing fixture according to claim 4 is characterized in that: A first synchronization sleeve (407) is fixedly connected to the first main clamp arm (400) along the sliding direction of the main mounting plate (200), and a first synchronization rod (505) is fixedly connected to the first auxiliary clamp arm (500) along the sliding direction of the auxiliary mounting plate (300), and the first synchronization sleeve (407) and the first synchronization rod (505) are slidably fitted; A second synchronization sleeve (605) is fixedly connected to the second main clamp arm (600) along the sliding direction of the main mounting plate (200), and a second synchronization rod (704) is fixedly connected to the second auxiliary clamp arm (700) along the sliding direction of the auxiliary mounting plate (300), and the second synchronization sleeve (605) is slidably fitted with the second synchronization rod (704).

6. The multi-purpose elbow workpiece processing fixture according to claim 1, characterized in that: A first main sliding rod (401) is fixedly connected to the first main clamping plate (402) along the radial direction of the main rotating shaft (404), and the first main sliding rod (401) is slidably connected to the first main clamping arm (400); A first secondary sliding rod (501) is fixedly connected to the first secondary clamping plate (502) along the radial direction of the secondary rotating shaft (504), and the first secondary sliding rod (501) is slidably connected to the first secondary clamping arm (500); A second main sliding rod (601) is fixedly connected to the second main clamping plate (602) along the radial direction of the main rotating shaft (404), and the second main sliding rod (601) is slidably connected to the second main clamping arm (600); A second secondary sliding rod (701) is fixedly connected to the second secondary clamping plate (702) along the radial direction of the secondary rotating shaft (504), and the second secondary sliding rod (701) is slidably connected to the second secondary clamping arm (700).

7. A multi-purpose elbow workpiece processing fixture according to claim 6, characterized in that: The first main clamping arm (400) is threadedly connected with a first main screw (403) for fastening the first main sliding rod (401); A first secondary screw (503) for fastening the first secondary sliding rod (501) is threadedly connected to the first secondary clamping arm (500); A second main screw (603) for fastening the second main sliding rod (601) is threadedly connected to the second main clamping arm (600); The second secondary clamp arm (700) is threadedly connected with a second secondary screw (703) for fastening the second secondary sliding rod (701).

8. A multi-purpose elbow workpiece processing fixture according to any one of claims 1 to 7, characterized in that: Also included is a two-jaw chuck (100), wherein two jaws of the two-jaw chuck (100) are distributed at 180° around the axis of the two-jaw chuck (100); The mounting end of the main mounting plate (200) is fixedly connected to one jaw of the two-jaw chuck (100), and the mounting end of the auxiliary mounting plate (300) is fixedly connected to the other jaw of the two-jaw chuck (100), and the length direction of the main mounting plate (200) and the auxiliary mounting plate (300) is consistent with the axial direction of the two-jaw chuck (100); The V-shaped groove on the first main plate (402) and the V-shaped groove on the first auxiliary plate (502) are symmetrically distributed on both sides of the axial section of the two-jaw chuck (100), and the V-shaped groove on the second main plate (602) and the V-shaped groove on the second auxiliary plate (702) are symmetrically distributed on both sides of the axial section of the two-jaw chuck (100).

9. The multi-purpose elbow workpiece processing fixture according to claim 8, characterized in that: A positioning pin (207) is provided at the assembly end of the main mounting plate (200) so as to slide along the length direction of the main mounting plate (200), the positioning pin (207) comprising a column (2071), a ball head (2072) being fixedly provided at one end of the column (2071), a limiting convex ring (2073) being fixedly provided on the column (2071), a positioning spring (208) being provided between the column (2071) and the main mounting plate (200), the positioning spring (208) pressing the column (2071) in the direction of the ball head (2072), the limiting convex ring (2073) cooperating with the main mounting plate (200) to limit the sliding limit position of the ball head (2072); A first boss (410) is fixedly connected to one side of the first main clamping arm (400) corresponding to the main mounting plate (200), and a first ball socket (4101) is provided on the first boss (410). When the angle bisector of the V-shaped clamping groove on the first main clamping plate (402) coincides with the length direction of the main mounting plate (200), the ball head (2072) engages with the first ball socket (4101); The second main clamping arm (600) is fixedly connected to a second boss (607) on one side corresponding to the main mounting plate (200), and the second boss (607) is provided with a second ball socket (6072). When the angle bisector of the V-shaped groove on the second main clamping plate (602) coincides with the length direction of the main mounting plate (200), the ball head (2072) engages with the second ball socket (6072).

10. The multi-purpose elbow workpiece processing fixture according to claim 9, characterized in that: The assembly end of the main mounting plate (200) is slidably connected with a centrifugal block (209) along the sliding direction of the main mounting plate (200); the centrifugal block (209) is located at one end of the column (2071) away from the ball head (2072); a return spring (210) is provided between the centrifugal block (209) and the main mounting plate (200); the return spring (210) presses the centrifugal block (209) toward the inner side of the main mounting plate (200); the centrifugal block (209) is provided with an avoidance groove (2091) matched with the column (2071); when the centrifugal block (209) slides centrifugally, the avoidance groove (2091) is misaligned with the column (2071) to prevent the column (2071) from rebounding.

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