Self-adaptive clamping and interchanging clamp

Abstract

The utility model relates to a self-adaptive clamping interchangeable clamp, and aims to solve the problems of low product remodeling efficiency, poor adaptability, insufficient repeated positioning precision and high cost of the conventional fixing structure or special customized clamp. The clamp comprises a base module, a clamp bottom plate is arranged on the base module, positioning pins are arranged on the base module, positioning holes matched with the positioning pins are formed in the clamp bottom plate, and top pressing blocks used for fixing the clamp bottom plate are further arranged on the two sides of the clamp bottom plate. According to the utility model, the operation difficulty is simplified, the clamping efficiency is improved, and more than 90% of sample size can be covered.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing fixture field, concretely is a kind of self-adapting clamping interchangeable fixture suitable for CNC machine tool, especially suitable for the efficient processing of multiple categories, small batch sample, can realize the quick switching of fixture and high adaptability clamping. BACKGROUND

[0002] Traditional CNC fixture usually adopts single fixed structure or special custom fixture, and the following problems exist:

[0003] 1. Low product change efficiency (changing fixture needs to disassemble screw, repositioning calibration, time-consuming up to 10-30 minutes).

[0004] 2. Poor adaptability (fixed fixture is difficult to be compatible with different sizes).

[0005] 3. Inadequate repeatability (manual adjustment is prone to positioning error, usually >0.05mm, affecting processing consistency).

[0006] 4. High cost (special fixture production cycle is long, generally 3-7 days / set, difficult to meet the high frequency sample trial making demand). INVENTION CONTENTS

[0007] The utility model provides a kind of self-adapting clamping interchangeable fixture for the above problems, simplify the operation difficulty, improve clamping efficiency, and can cover more than 90% sample size.

[0008] Therefore, the utility model takes the following technical scheme: a kind of self-adapting clamping interchangeable fixture, including base module, the fixture bottom plate is arranged on the base module, and it is characterized in that the positioning pin is arranged on the base module, the positioning hole matched with positioning pin is arranged on the fixture bottom plate, and the top pressing block for fixing the fixture bottom plate is also arranged on the both sides of fixture bottom plate.

[0009] As preferred, the positioning pin is two, and is distributed at the both ends of base module, and the positioning hole is tapered positioning hole.

[0010] As preferred, the middle plate module is arranged on the base module, a plurality of screw holes are uniformly arranged on the middle plate module, the left fixed block and the right fixed block are arranged on the middle plate module, and the two fixed blocks are positioned on the middle plate module by fastener.

[0011] As preferred, one of the fixed blocks is wedge clamping device, which includes fixed block main body, the fixed block main body forms inclined sliding groove in the center, and wedge-shaped block matched with the inclined sliding groove is arranged in the sliding groove.

[0012] As preferred, the wedge-shaped block forms guide hole, and is positioned in the inclined sliding groove by positioning screw.

[0013] As preferred, the outer end of the fixed block body forms a fixed block body guide hole, and another positioning screw is arranged in the guide hole to position the fixed block body on the middle plate module.

[0014] As preferred, the inner end face of the other fixed block is a stepped face.

[0015] As preferred, the clamping stroke of the wedge-shaped clamping device is 12-115mm.

[0016] As preferred, the middle plate module is marked with a scale along the distribution direction of the threaded hole.

[0017] As preferred, the top pressing block is driven by a cylinder to perform a downward pressing or upward lifting action.

[0018] Compared with the prior art, the utility model has the beneficial effects as follows:

[0019] 1. The efficiency of changing the type is improved by 90%, and the 30-second double-clamp interchanging is realized by the pneumatic pressing combined with the pin positioning.

[0020] 2. The clamping range is expanded: the left and right fixed blocks plus the wedge-shaped device can adapt to most workpiece clamping, covering more than 90% of sample sizes.

[0021] 3. High positioning accuracy: the pin positioning error is less than or equal to 0.01mm, and the machining repeatability is ±0.02mm.

[0022] 4. The cost is reduced by 60%: the modular design reduces the need for special clamps, and the manufacturing cost of a single clamp module is only 1 / 3 of that of a traditional clamp.

[0023] 5. Easy operation: no professional tools are needed to complete the clamping adjustment, and the artificial training time is shortened to 30 minutes. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is an overall structure explosion diagram of the utility model.

[0025] Fig. 2 It is a top view of the screw hole layout of the middle plate module.

[0026] Fig. 3 It is a perspective view of the wedge-shaped clamping device.

[0027] Fig. 4 It is a sectional view of the wedge-shaped clamping device.

[0028] Fig. 5 It is a minimum clamping size schematic diagram.

[0029] Fig. 6 It is a maximum clamping size schematic diagram.

[0030] In the figure: 101 - base module; 102 - pin; 103 - top pressing block; 201 - clamp bottom plate; 202 - conical positioning hole; 301 - middle plate module; 302 - threaded hole; 401 - left fixed block; 402 - right fixed block body; 403 - wedge-shaped block; 404 - positioning screw. DETAILED DESCRIPTION

[0031] The utility model is further described below in combination with specific embodiments.

[0032] As Figs. 1-2 shown, the utility model discloses a kind of self-adaptive clamping interchangeable fixtures, including base module 101, the base module 101 on setting clamp bottom plate 201, positioning pin 102 is set on base module, the positioning hole matched with positioning pin is set on the clamp bottom plate, top pressing block 103 for being fixed to clamp bottom plate is also set on the both sides of clamp bottom plate, and top pressing block is driven by air cylinder and is pressed down or lifted up action.

[0033] Specifically, base module 101 is fixed on the workbench surface of CNC machine tool, and two high-precision hardened pins are arranged on the surface, the pin diameter is 10mm, and the tolerance is ≤0.005mm. The bottom of the clamp bottom plate has a conical positioning hole matched with the pin, and the two sides are automatically pressed by the top pressing block of the cylinder in the 10mm area, with a pressing force of ≥300N and a pressing / loosening time of ≤2 seconds.

[0034] In one embodiment, a middle plate module 301 is provided on the base module, a plurality of threaded holes 302 are arranged transversely and uniformly on the middle plate module, a left fixed block 401 and a right fixed block 402 are provided on the middle plate module, and the two fixed blocks are positioned on the middle plate module by fasteners. The threaded hole spacing is 8mm±0.1mm, forming a standardized installation grid.

[0035] As Figs. 3-4 shown, specifically, one of the fixed blocks is a wedge-shaped clamping device, which includes a fixed block body, the fixed block body forms an inclined sliding groove in the center, and a wedge-shaped block 403 matched with the inclined sliding groove is arranged in the sliding groove. The workpiece is clamped by adjusting the position of the wedge-shaped block.

[0036] Specifically, a guide hole is formed in the wedge-shaped block, and the wedge-shaped block is positioned in the inclined sliding groove by a positioning screw 404. A positioning hole is formed on the inclined surface in the inclined sliding groove for locking the positioning position of the wedge-shaped block.

[0037] In order to lock the position of the fixed block, a fixed block body guide hole is formed at the outer end of the fixed block body, and another positioning screw is arranged in the guide hole to position the fixed block body on the middle plate module 301.

[0038] Specifically, the inner end face of the left fixed block is a stepped face. The stepped face is formed to position the workpiece and form a better clamping fit.

[0039] Specifically, the clamping stroke of the wedge-shaped clamping device is 12-115 mm. In this way, more sizes of workpieces can be adapted. For example Fig. 5 As shown in the minimum clamping size diagram, for example Fig. 6 As shown in the maximum clamping size diagram.

[0040] In order to accurately calibrate the position of the left and right fixed blocks, a scale is marked on the middle plate module along the distribution direction of the threaded holes.

[0041] The technical innovation of the utility model lies in:

[0042] 1. Modular quick-change interface design: a double-pin conical positioning + pneumatic compression composite mechanism is arranged on the CNC machine tool to realize accurate positioning and locking of the clamp module within 30 seconds (the traditional clamp needs 10-20 minutes).

[0043] 2. Omnidirectional adjustable threaded hole array: M6 threaded holes are evenly distributed on the surface of the plate module in the transverse direction (spacing 8 mm±0.1), forming a standardized installation grid, supporting the installation of left and right fixed blocks at any position, and adapting to the clamping requirements of workpieces of different widths.

[0044] 3. Wedge-shaped self-adaptive clamping device: integrated with a beveled sliding block + guide bevel structure, workpiece clamping is realized through a single thread, and the clamping force is adjustable (50-300N).

[0045] The utility model is specifically operated as follows:

[0046] 1. Change operation: release the pneumatic pressing plate (103), remove the clamp module on the base. Insert the positioning hole (202) of the new clamp base plate (201) into the pin (102) on the base. Trigger the pneumatic pressing block (103) to automatically lock, complete the change (total time ≤30 seconds).

[0047] 2. Workpiece clamping: adjust the width of the left and right fixed blocks on the middle plate module (301) according to the size of the workpiece (suitable for the range of the workpiece). After placing the workpiece, rotate the wedge-shaped block positioning screw (404) to drive the wedge-shaped block (403) to clamp the workpiece.

[0048] It should be understood that these embodiments are only used to illustrate the utility model and not to limit the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. An adaptive clamping interchangeable fixture comprising a base module, said base module having a fixture base plate disposed thereon, characterized in that The base module is provided with positioning pins, the clamp base plate is provided with positioning holes matched with the positioning pins, and top pressing blocks for fixing the clamp base plate are arranged on both sides of the clamp base plate.

2. An adaptive clamping interchangeable fixture according to claim 1, characterized in that The positioning pins are two, which are distributed at both ends of the base module, and the positioning holes are tapered positioning holes.

3. An adaptive clamping interchangeable fixture according to claim 1 or 2, characterized in that The base module is provided with a middle plate module, a plurality of threaded holes are arranged on the middle plate module in a transverse and uniform manner, left and right fixing blocks are arranged on the middle plate module, and the two fixing blocks are positioned on the middle plate module through fasteners.

4. An adaptive clamping interchangeable fixture according to claim 3, wherein One of the fixing blocks is a wedge clamping device, which comprises a fixing block body, an inclined sliding groove is formed in the center of the fixing block body, and a wedge-shaped block matched with the sliding groove is arranged in the sliding groove.

5. An adaptive clamping interchangeable fixture according to claim 4, characterized in that A guide hole is formed in the wedge-shaped block, and the wedge-shaped block is positioned in the inclined sliding groove through a positioning screw.

6. An adaptive clamping interchangeable fixture according to claim 5, characterized in that An outer end of the fixing block body is formed with a fixing block body guide hole, and another positioning screw is arranged in the guide hole to position the fixing block body on the middle plate module.

7. An adaptive clamping interchangeable fixture according to claim 4, wherein An inner end surface of the other fixing block is a stepped surface.

8. An adaptive clamping interchangeable fixture according to claim 4, wherein The clamping stroke of the wedge clamping device is 12-115 mm.

9. An adaptive clamping interchangeable fixture according to claim 3, wherein A scale is marked on the middle plate module along the distribution direction of the threaded holes.

10. The self-adapting clamped interchanging fixture according to claim 1, wherein The top pressing blocks are driven by air cylinders to perform downward pressing or upward lifting actions.

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