A follow-up self-centering opening chuck for clamping rectangular tubes

Abstract

The utility model discloses a kind of follow-up type self-centering opening chuck for clamping rectangular tube, comprising: barrel assembly, by fixed ring and movable ring are connected by hinge pin and constitute the ring structure of openable and closable;Locking mechanism, including the lock hole on fixed ring and movable ring, locking pin that locking fixed ring and movable ring;Self-centering clamping mechanism, including a pair of symmetrically arranged V-shaped clamping blocks, the screw rod of driving two groups of V-shaped clamping blocks synchronous reverse movement;Support rotating assembly, including base, roller support installed on base, and four rollers supporting the outer wall of barrel, the barrel can rotate on roller around its own axis after closing;Moving assembly, including walking wheel arranged at the bottom of base;Workpiece positioning mechanism, including the carrier roller located in the center of barrel, for supporting rectangular tube workpiece.The utility model is used for clamping small cross-section rectangular tube workpiece at middle position, can feed from above chuck, and ensure that workpiece axis is straight and rotates smoothly after clamping without shaking.

Description

Technical Field

[0001] This utility model relates to the field of plasma CNC cutting equipment technology. More specifically, this utility model relates to a follow-up self-centering open chuck for clamping rectangular tubes. Background Technology

[0002] The current structure of CNC plasma tube cutting machines on the market includes a moving chuck, a fixed chuck, guide rails, a cutting torch, and a dust removal system. The cutting machine's workflow is as follows: The moving chuck moves outward, and the rectangular tube workpiece is hoisted in from above. The moving chuck then moves inward, using both the moving and fixed chucks to clamp the workpiece at both ends. The cutting torch is positioned, the workpiece rotates, and the cutting torch begins cutting according to the program. After cutting one joint of the part, the moving chuck feeds according to the program requirements, and after the workpiece moves to the appropriate position, the cutting torch cuts the other joint of the part. After one part is cut, the above process is repeated to cut the next part.

[0003] When the side length of a rectangular tube workpiece is less than 100mm, after the workpiece is clamped by chucks at both ends, the downward curvature of the middle part is greater than 70mm. During cutting, the rectangular tube workpiece rotates, and due to the severe downward curvature of the workpiece, its rotation is unstable, causing the end to be cut to vibrate, resulting in a serrated curved surface on the cut surface and unqualified cutting quality. Utility Model Content

[0004] The purpose of this invention is to provide a follow-up self-centering open chuck for clamping rectangular tubes, which is used to clamp small cross-section rectangular tube workpieces in the middle position, can feed from above the chuck, and ensures that the axis of the workpiece is straight and the rotation is stable and does not shake after clamping.

[0005] The technical solution adopted by this utility model to solve this technical problem is: a follow-up self-centering open chuck for clamping rectangular tubes, comprising: The cylindrical assembly consists of a fixed ring and a movable ring connected by a hinge pin to form an openable and closable annular structure. The locking mechanism includes locking holes provided on the fixed ring and the movable ring, and locking pins for locking the fixed ring and the movable ring; The self-centering clamping mechanism includes a pair of symmetrically arranged V-shaped clamping blocks and a screw that drives the two sets of V-shaped clamping blocks to move synchronously in opposite directions. The rotating support assembly includes a base, a roller bracket mounted on the base, and four rollers supporting the outer wall of the cylinder. When the cylinder is closed, it can rotate around its own axis on the rollers. Mobility components, including wheels located at the bottom of the base; The workpiece positioning mechanism includes a support roller located at the center of the cylinder for supporting rectangular tube workpieces.

[0006] A further aspect of this invention is that it also includes an anti-rotation pin, which is detachably inserted between the fixed ring and the movable ring to limit relative rotation between the fixed ring and the movable ring.

[0007] As a further embodiment of this utility model, the locking pin is provided with a ball structure at its end. When the locking pin is rotated clockwise, the ball extends outward to clamp the outer wall of the fixing ring, and when it is rotated counterclockwise, the ball retracts inward to unlock.

[0008] As a further aspect of this utility model, the screw has a left-right bidirectional thread structure, and each end drives a set of V-shaped clamping blocks to move relative to or away from the center.

[0009] As a further embodiment of this utility model, the self-centering clamping mechanism also includes a T-shaped wrench for manually rotating the screw; The moving component also includes a handle for pushing the chuck.

[0010] As a further embodiment of this utility model, the walking wheel is a rolling wheel structure, and the walking wheel is provided with a flange structure near the wheel edge.

[0011] As a further aspect of this utility model, the working surface of the V-shaped clamping block has an included angle of 90°, and its center of symmetry coincides with the axis of the cylinder.

[0012] This utility model has at least the following beneficial effects: 1. A mid-position support structure is adopted to self-center and clamp the rectangular tube workpiece, achieving three-point centering (the two end chucks are combined with the open chuck of this application), eliminating workpiece bending deformation and ensuring a flat cutting surface.

[0013] 2. Breaking through the limitations of closed chuck feeding, the chuck can be opened to achieve efficient vertical feeding, suitable for application scenarios where it is difficult to feed from the side of the chuck, and has wide applicability.

[0014] 3. A pair of V-shaped clamping blocks, combined with a manual screw drive, simplify the structure and reduce costs, making manual operation more reliable and improving clamping efficiency.

[0015] 4. The combination of wheels and handles allows for flexible movement and positioning, improving the adaptability to production lines.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the open chuck of this utility model; Figure 2 This is a schematic diagram of the closed cylindrical assembly of this utility model; Figure 3 This is a schematic diagram of the cylinder assembly of this utility model when opened; Figure 4 This is a schematic diagram of the locking pin of this utility model; Figure 5 This is a front view of the open chuck structure of this utility model; Figure 6 This is a schematic diagram of the working principle of the open chuck of this utility model.

[0018] Among them, 1-walking wheel, 2-base, 3-roller bracket, 4-roller, 5-fixed ring, 6-moving ring, 7-hinge pin, 8-anti-rotation pin, 9-V-shaped clamping block, 10-locking pin, 11-support roller, 12-screw, 13-workpiece, 14-T-shaped wrench. Detailed Implementation

[0019] The present invention will now be described in detail and completely with reference to the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention with reference to the accompanying drawings, it should be particularly noted that the technical solutions and features provided in the various parts of the present invention, including the following description, can be combined with each other without conflict.

[0020] Furthermore, the embodiments of the present invention described below are generally only a part of the embodiments of the present invention, and not all of the embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the protection scope of the present invention.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific implementation process is as follows: like Figures 1-6 As shown, this utility model provides a follower-type self-centering open chuck for clamping rectangular tubes, comprising: The cylindrical assembly consists of a fixed ring 5 and a movable ring 6 connected by a hinge pin 7 to form an openable and closable annular structure. The movable ring 6 can rotate around the hinge pin 7 to an open or closed state. The locking mechanism includes locking holes provided on the fixed ring and the movable ring, and locking pins 10 for locking the fixed ring and the movable ring. The locking pins are used to fix the closed cylinder body so that the cylinder body is connected into a complete circle. The self-centering clamping mechanism includes a pair of symmetrically arranged V-shaped clamping blocks 9 and a screw 12 that drives the two sets of V-shaped clamping blocks 9 to move synchronously in opposite directions. The rotating support assembly includes a base 2, a roller bracket 3 mounted on the base 2, and four rollers 4 supporting the outer wall of the cylinder. After the cylinder is closed, it can rotate around its own axis on the rollers 4. The moving component includes wheels 1 located at the bottom of the base 2; The workpiece positioning mechanism includes a rectangular roller 11 located at the center of the cylinder, which is used to support the rectangular tube workpiece.

[0022] This technical solution may also include the following technical details to better achieve the technical effect: the hinge pin may close on its own during vibration, so a mechanical lock is designed to ensure operational safety. Anti-rotation pins are provided on the side of the fixed ring and the movable ring near the hinge pin. The anti-rotation pins are detachably inserted between the fixed ring and the movable ring to limit relative rotation between the fixed ring and the movable ring. When the movable ring 6 rotates to the vertically open state, the anti-rotation pin holes of the fixed ring and the movable ring are opposite each other, and the anti-rotation pin 8 is inserted into the anti-rotation pin holes of the fixed ring and the movable ring to prevent the movable ring 6 from closing accidentally and injuring the workpiece or the operator.

[0023] Specifically, to open the closed cylinder, rotate the locking pin handle counterclockwise, the ball retracts, pull out the locking pin, rotate the movable ring upwards to the vertical position, and insert the anti-rotation pin to prevent the movable ring from rotating into the closed state. To close the open cylinder, pull out the anti-rotation pin, rotate the movable ring downwards to the horizontal position, and insert the locking pin. The fixed ring and movable ring close as a whole. Rotate the locking pin handle clockwise, the ball extends outwards, and locks the outer wall of the fixed ring to prevent the pin from falling off when the cylinder rotates.

[0024] This technical solution may also include the following technical details to better achieve the technical effect: the locking pin is an existing product available on the market; the end of the locking pin 10 is provided with a ball bearing structure; when the locking pin 10 is rotated clockwise, the ball bearing extends outward and clamps the outer wall of the fixing ring 5 to prevent the locking pin from being pulled out; when rotated counterclockwise, the ball bearing retracts inward to unlock. Specifically, when closed, rotating the locking pin handle clockwise causes the ball bearing to extend outward and clamp the outer wall of the fixing ring; when opened, rotating the handle counterclockwise causes the ball bearing to retract inward and pull out the locking pin. The locking pin design improves the locking force.

[0025] This technical solution may also include the following technical details to better achieve the technical effect: the screw 12 has a left and right bidirectional thread structure, and each end drives a set of V-shaped clamping blocks 9 to move relative to or away from the center.

[0026] This technical solution may also include the following technical details to better achieve the technical effect: the self-centering clamping mechanism also includes a T-wrench for manually rotating the screw; The moving component also includes a handle for pushing the chuck.

[0027] This technical solution may also include the following technical details to better achieve the technical effect: the walking wheel 1 is a rolling wheel structure, which can only rotate along one axis, and the walking wheel is provided with a flange structure near the wheel edge, the flange structure is attached to the guide rail edge to prevent the chuck base from derailing.

[0028] This technical solution may further include the following technical details to better achieve the technical effect: the working surface of the V-shaped clamping block 9 has an included angle of 90°, and its center of symmetry coincides with the axis of the cylinder. The 90° inclined surface of the V-shaped clamping block 9 fits against the chamfer of the right-angled side of the rectangular tube, while constraining displacement in the X / Y directions. Preferably, the 90° included angle of the V-shaped clamping block 9 is rounded.

[0029] Working principle of an open-end chuck: 1. Opening and closing feeding stage: Operate the anti-rotation pin 8 to unlock, rotate the movable ring 6 to the vertical position and fix it, and the cylinder is in an open state; the rectangular tube workpiece is vertically hoisted in from above and falls onto the rectangular support roller 11 of the base, ensuring that the workpiece is within the working range of the V-shaped clamping block 9.

[0030] 2. Self-centering clamping stage: Manually rotate the double-sided threaded screw with a T-shaped socket wrench. The left-hand threaded section drives the left V-shaped clamping block to move to the right, and the right-hand threaded section drives the right V-shaped clamping block to move to the left. The two sets of V-shaped blocks move towards the center synchronously. The inclined surface of the V-shaped clamping block pushes the workpiece to automatically correct its deviation in the X / Y direction until the center of the workpiece coincides with the center of the V-shaped block. This ensures that the center of the workpiece in the three chuck positions is on the same horizontal straight line, eliminating the downward bending of the workpiece.

[0031] 3. Closing and locking stage: Rotate the movable ring 6 down to the horizontal position, insert the locking pin 10 and rotate the handle clockwise, the ball extends outward and clamps the outer wall of the fixing ring 5; the cylinder closes into a complete circular structure, forming a rigid support.

[0032] 4. Follow-up cutting stage: The moving chuck and fixed chuck drive the workpiece to rotate, and the workpiece drives the cylinder to rotate synchronously around the axis. The cylinder is supported by four rollers to achieve low-resistance rotation. After the workpiece is cut, the moving chuck pushes the workpiece to feed in order to cut the next workpiece. At this time, the open chuck in the clamping state does not need to be released, and it can easily move to the corresponding position with the workpiece by relying on the traveling wheels.

[0033] 5. Movement and adjustment stage: Release the V-shaped clamping block 9, and the workpiece sinks to the idler roller 11; hold the handle and slide along the external guide rail with the help of the traveling wheel 1 to easily move the chuck to the target position.

[0034] After the open chuck clamps workpiece 13 in the middle position, the workpiece is flat. During cutting, driven by the moving and fixed chuck, the rectangular tube drives the workpiece cylinder to rotate around the center on the rollers. The overall rotation of the workpiece is stable, ensuring that the cutting quality of the workpiece meets the technical requirements.

[0035] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and embodiments shown and described herein.

Claims

1. A follower-type self-centering open chuck for clamping rectangular tubes, characterized in that, include: The cylindrical assembly consists of a fixed ring and a movable ring connected by a hinge pin to form an openable and closable annular structure. The locking mechanism includes locking holes provided on the fixed ring and the movable ring, and locking pins for locking the fixed ring and the movable ring; The self-centering clamping mechanism includes a pair of symmetrically arranged V-shaped clamping blocks and a screw that drives the two sets of V-shaped clamping blocks to move synchronously in opposite directions. The rotating support assembly includes a base, a roller bracket mounted on the base, and four rollers supporting the outer wall of the cylinder. When the cylinder is closed, it can rotate around its own axis on the rollers. Mobility components, including wheels located at the bottom of the base; The workpiece positioning mechanism includes a support roller located at the center of the cylinder for supporting rectangular tube workpieces.

2. The follower-type self-centering open chuck for clamping rectangular tubes as described in claim 1, characterized in that, It also includes an anti-rotation pin, which is detachably inserted between the fixed ring and the movable ring to limit relative rotation between the fixed ring and the movable ring.

3. The follower-type self-centering open chuck for clamping rectangular tubes as described in claim 1, characterized in that, The locking pin has a ball bearing structure at its end. When the locking pin is rotated clockwise, the ball bearing extends outward to lock the outer wall of the fixing ring. When rotated counterclockwise, the ball bearing retracts inward to unlock.

4. The follower-type self-centering open chuck for clamping rectangular tubes as described in claim 3, characterized in that, The screw has a bidirectional thread structure, and each end drives a set of V-shaped clamping blocks to move toward or away from the center.

5. The follower-type self-centering open chuck for clamping rectangular tubes as described in claim 1, characterized in that, The self-centering clamping mechanism also includes a T-wrench for manually rotating the screw; The moving component also includes a handle for pushing the chuck.

6. The follower-type self-centering open chuck for clamping rectangular tubes as described in claim 1, characterized in that, The traveling wheel is a rolling wheel structure, and the traveling wheel has a flange structure near the wheel edge.

7. The follower-type self-centering open chuck for clamping rectangular tubes as described in claim 6, characterized in that, The working surface of the V-shaped clamping block has an included angle of 90°, and its center of symmetry coincides with the axis of the cylinder.

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