Precision flexible adaptive clamping device

Abstract

This invention discloses a precision flexible adaptive clamping device, comprising a mounting base, a limiting ring, a pull rod, a first spring, a tension sleeve, a first pressure plate, a second pressure plate, a second spring, a washer, and a nut. The limiting ring is mounted on the mounting base. The bottom of the pull rod passes through the central hole of the mounting base and is disposed within the limiting ring. The first spring is sleeved on the middle part of the pull rod. The tension sleeve surrounds the pull rod and the outside of the first spring. The first spring is disposed between the bottom of the pull rod and the tension sleeve. The first pressure plate is detachably mounted on the top outer periphery of the tension sleeve. The second pressure plate faces the first pressure plate. The second spring is disposed between the tension sleeve and the second pressure plate. The head of the pull rod has an external thread. The head of the pull rod passes through the tension sleeve, the second spring, and the second pressure plate and is threadedly connected to the nut. The washer is disposed between the nut and the second pressure plate.

Description

Technical Field

[0001] This invention relates to the field of tooling fixture design and manufacturing technology, and in particular to a precision flexible adaptive clamping device. Background Technology

[0002] With the development of the machinery industry, quick mold change has been widely used, and modular fixtures are becoming more and more common, and processing efficiency is gradually improving. However, some products with extremely high requirements are still limited by processing methods and equipment, and cannot meet design requirements, thus affecting the product development progress and product precision.

[0003] Therefore, those skilled in the art are dedicated to developing a precision flexible adaptive clamping device. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is how to solve the problem that some products with extremely high requirements are limited by processing methods and equipment, thus failing to meet design requirements and affecting the product development progress and product accuracy.

[0005] To achieve the above objectives, the present invention provides a precision flexible adaptive clamping device, comprising a mounting base, a limiting ring, a pull rod, a first spring, a tension sleeve, a first pressure plate, a second pressure plate, a second spring, a washer, and a nut. The limiting ring is mounted on the mounting base. The bottom of the pull rod passes through the central hole of the mounting base and is disposed within the limiting ring. The first spring is sleeved on the middle part of the pull rod. The tension sleeve is arranged around the outside of the pull rod and the first spring. The first spring is disposed between the bottom of the pull rod and the tension sleeve. The first pressure plate is detachably mounted on the top outer periphery of the tension sleeve. The second pressure plate faces the first pressure plate. The second spring is disposed between the tension sleeve and the second pressure plate. The head of the pull rod has an external thread. The head of the pull rod passes through the tension sleeve, the second spring, and the second pressure plate and is threadedly connected to the nut. The washer is disposed between the nut and the second pressure plate.

[0006] Furthermore, the mounting base includes a base and a mounting cylinder. The outer edge of the base is provided with mounting holes, which are suitable for mounting on the worktable of the machine tool equipment. Multiple limiting grooves are vertically formed on the outer periphery of the mounting cylinder.

[0007] Furthermore, the limiting ring has a first step in the middle, and a limiting screw hole is provided on the inner side of the limiting ring at the position that mates with the limiting groove. The limiting ring can be detachably fixed in the limiting groove by a limiting screw passing through the limiting screw hole.

[0008] Furthermore, the bottom of the pull rod is frustum-shaped, the middle and head of the pull rod are cylindrical, a portion of the outer conical surface at the bottom of the pull rod is blocked by the first step, and the diameter of the middle part of the pull rod is larger than the diameter of the head of the pull rod.

[0009] Furthermore, multiple through slots are vertically formed along the outer periphery of the bottom of the expansion sleeve. When the bottom of the expansion sleeve is close to the outer conical surface of the bottom of the pull rod, the bottom of the expansion sleeve is squeezed outward. The middle part of the expansion sleeve has a second step. The first spring is disposed between the upper step surface of the bottom of the pull rod and the second step. A limit pin hole is formed on the expansion sleeve. A limit pin is disposed in the limit pin hole. The limit pin is slidably disposed facing the head side of the pull rod.

[0010] Furthermore, the first pressure plate includes a first pressure plate head and a first pressure plate body. The first pressure plate body is arranged around the top outer periphery of the expansion sleeve, and the first pressure plate head is threadedly connected to the first pressure plate body by a first screw.

[0011] Furthermore, the second pressure plate includes a second pressure plate head and a second pressure plate body. The second pressure plate body has a cylindrical portion that allows the head of the pull rod to pass through and blocks the second spring. The second spring is disposed between the cylindrical portion and the second step. The second pressure plate head is threadedly connected to the second pressure plate body by a second screw.

[0012] Furthermore, it also includes a guide rod, which passes through a guide hole arranged in a straight line between the first pressure plate and the second pressure plate.

[0013] Furthermore, a first guide hole is provided on the first pressure plate body, and a second guide hole is provided on the second pressure plate body. The first guide hole and the second guide hole are in a straight line. One end of the guide rod passes through and is disposed in the first guide hole. The guide rod is detachably fixed by passing through the first guide hole with a guide rod screw, and the other end of the guide rod slides into the second guide hole.

[0014] Furthermore, the nut is a wing nut.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention is applicable to the processing of large and medium-sized casting products with high requirements. It is highly efficient, requires very low investment, and reduces the problem of scrapping the entire product due to deformation during processing.

[0017] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. Attached Figure Description

[0018] Figure 1 This is an exploded view of a preferred embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the assembled component according to a preferred embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the assembled finished product according to a preferred embodiment of the present invention.

[0021] Among them, 1-mounting base, 2-limiting ring, 3-pull rod, 4-first spring, 5-expansion sleeve, 6-limiting pin, 7-first pressure plate, 8-second pressure plate, 9-second spring, 10-washer, 11-wing nut, 12-second screw, 13-guide rod, 14-first screw. Detailed Implementation

[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0023] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0024] This invention provides a unique processing method that utilizes existing vertical machining equipment and specialized tooling to locate suitable positioning and limiting points on the product. This ensures that the product does not deform or experience stress release before or after processing, and that the product's accuracy meets design requirements. During clamping, a 0.05mm thick elastic rubber pad is attached to the positioning surface. When clamping the workpiece, the force applied must be kept to a minimum of 1 bar of torque. The product is processed in its natural state, and after the pressure plate is released, the change in product shape on the machine should not exceed 2µm. This is something that traditional processing methods, such as vacuum chucks or specialized fixtures, cannot guarantee.

[0025] like Figures 1 to 2 As shown, the assembly method of the precision flexible adaptive clamping device provided by the present invention is as follows:

[0026] 1) Figure 1 The limiting ring 2 is installed on the mounting base 1 to form a... Figure 2 The first component A in the process.

[0027] 2) Figure 1 The pull rod 3 and the first spring 4 are assembled together to form Figure 2 The second component, B.

[0028] 3) Figure 1 The expansion sleeve 5, limit pin 6, first pressure plate 7, guide rod 13, first screw 14, and second spring 9 are assembled together to form Figure 2 The third component, C.

[0029] 4) Figure 1 The second pressure plate 8, washer 10, wing nut 11, and second screw 12 are assembled together to form Figure 2 The fourth component, D.

[0030] 5) Figure 2 The first component A is mounted on the fixture.

[0031] 6) Figure 2 The second component B is inserted into the inner hole of the lower opening of the third component C, and the fourth component 4 is inserted into the inner hole of the upper opening of the third component C. When the wing nut 11 of the fourth component D is threadedly connected to the pull rod 3 of the second component B, the workpiece is clamped. When the workpiece is clamped, the outer conical surface of the second component B begins to apply clamping force to the expansion sleeve 5 of the third component C, thereby locking the third component C.

[0032] like Figure 1 As shown in Figure 3, the present invention provides a precision flexible adaptive clamping device, including a mounting base 1, a limiting ring 2, a pull rod 3, a first spring 4, a tension sleeve 5, a first pressure plate 7, a second pressure plate 8, a second spring 9, a washer 10, a wing nut 11, and a guide rod 13. The limiting ring 2 is mounted on the mounting base 1. The bottom of the pull rod 3 passes through the central hole of the mounting base 1 and is disposed inside the limiting ring 2. The first spring 4 is sleeved on the middle part of the pull rod 3. The tension sleeve 5 is arranged around the outside of the pull rod 3 and the first spring 4. The first spring 4 is disposed on... Between the bottom of the pull rod 3 and the expansion sleeve 5, the first pressure plate 7 is detachably installed on the top outer periphery of the expansion sleeve 5, the second pressure plate 8 is set facing the first pressure plate 7, the second spring 9 is set between the expansion sleeve 5 and the second pressure plate 8, the head of the pull rod 3 has external threads, the head of the pull rod 3 passes through the expansion sleeve 5, the second spring 9, the second pressure plate 8 and is threadedly connected to the wing nut 11, the washer 10 is set between the wing nut 11 and the second pressure plate 8, and the guide rod 13 passes through the guide hole set in the straight line between the first pressure plate 7 and the second pressure plate 8.

[0033] Mounting base 1 includes a base and a mounting cylinder. The outer edge of the base is provided with mounting holes, which are suitable for mounting on the workbench of machine tool equipment. Multiple limiting grooves are vertically opened on the outer periphery of the mounting cylinder.

[0034] The limiting ring 2 has a first step in the middle. The inner side of the limiting ring 2 is provided with a limiting screw hole at the position that matches the limiting groove. The limiting ring 2 can be detachably fixed in the limiting groove by the limiting screw passing through the limiting screw hole.

[0035] The bottom of the lever 3 is truncated cone-shaped, while the middle and head of the lever 3 are cylindrical. A portion of the outer conical surface at the bottom of the lever 3 is blocked by the first step, and the diameter of the middle part of the lever 3 is larger than the diameter of the head of the lever 3.

[0036] Multiple through slots are vertically opened along the outer periphery of the bottom of the expansion sleeve 5. When the bottom of the expansion sleeve 5 is close to the outer conical surface of the bottom of the pull rod 3, the bottom of the expansion sleeve 5 is squeezed outward, so that the bottom of the expansion sleeve 5 clamps the bottom of the pull rod 3. The middle part of the expansion sleeve 5 has a second step. The first spring 4 is set between the upper step surface and the second step of the bottom of the pull rod 3. A limit pin hole is opened on the expansion sleeve 5. A limit pin is set in the limit pin hole. The limit pin is slidably set on the head side of the pull rod 3.

[0037] The first pressure plate 7 includes a first pressure plate head and a first pressure plate body. The first pressure plate body is arranged around the top outer periphery of the expansion sleeve 5. The first pressure plate head is threadedly connected to the first pressure plate body by a first screw.

[0038] The second pressure plate 8 includes a second pressure plate head and a second pressure plate body. The second pressure plate body has a cylindrical portion that allows the head of the pull rod 3 to pass through and blocks the second spring 9. The second spring 9 is disposed between the cylindrical portion and the second step. The second pressure plate head is threadedly connected to the second pressure plate body by a second screw.

[0039] The first and second pressure plates are positioned opposite each other to clamp the workpiece.

[0040] The first pressure plate body has a first guide hole, and the second pressure plate body has a second guide hole. The first guide hole and the second guide hole are in a straight line. One end of the guide rod 13 passes through and is set in the first guide hole. The guide rod 13 is detachably fixed by passing through the first guide hole with a guide rod screw. The other end of the guide rod 13 slides into the second guide hole.

[0041] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A precision flexible adaptive clamping device, characterized in that, The assembly includes a mounting base, a limiting ring, a pull rod, a first spring, a tension sleeve, a first pressure plate, a second pressure plate, a second spring, a washer, a nut, and a guide rod. The limiting ring is mounted on the mounting base. The bottom of the pull rod passes through the central hole of the mounting base and is disposed within the limiting ring. The first spring is sleeved on the middle of the pull rod. The tension sleeve surrounds the pull rod and the outside of the first spring, with the first spring positioned between the bottom of the pull rod and the tension sleeve. The first pressure plate is detachably mounted on the top outer periphery of the tension sleeve. The second pressure plate faces the first pressure plate. The second spring is positioned between the tension sleeve and the second pressure plate. The head of the pull rod has external threads and passes through the tension sleeve, the second spring, and the second pressure plate to be threadedly connected to the nut. The washer is positioned between the nut and the second pressure plate. The limiting ring has a first step in its middle section. The bottom is truncated cone-shaped, and a portion of the outer conical surface of the bottom of the pull rod is blocked by the first step; multiple through slots are vertically opened along the outer periphery of the bottom of the expansion sleeve, and when the bottom of the expansion sleeve is close to the outer conical surface of the bottom of the pull rod, the bottom of the expansion sleeve is squeezed outward; the middle of the expansion sleeve has a second step, and the first spring is disposed between the upper step surface of the bottom of the pull rod and the second step; a limit pin hole is opened on the expansion sleeve, and a limit pin is disposed in the limit pin hole, the limit pin being slidably disposed facing the head side of the pull rod; the second pressure plate includes a second pressure plate head and a second pressure plate body, the second pressure plate body having a cylindrical portion that allows the head of the pull rod to pass through and blocks the second spring, the second spring being disposed between the cylindrical portion and the second step; the guide rod passes through a guide hole disposed in a straight line between the first pressure plate and the second pressure plate; the nut is a wing nut.

2. The precision flexible adaptive clamping device as described in claim 1, characterized in that, The mounting base includes a base and a mounting cylinder. The outer edge of the base is provided with mounting holes, which are suitable for mounting on the worktable of a machine tool. The outer periphery of the mounting cylinder is provided with multiple limiting grooves.

3. The precision flexible adaptive clamping device as described in claim 2, characterized in that, The inner side of the limiting ring is provided with a limiting screw hole at the position where it mates with the limiting groove. The limiting ring can be detachably fixed in the limiting groove by a limiting screw passing through the limiting screw hole.

4. The precision flexible adaptive clamping device as described in claim 3, characterized in that, The middle and head of the pull rod are both cylindrical, and the diameter of the middle part of the pull rod is larger than the diameter of the head of the pull rod.

5. The precision flexible adaptive clamping device as described in claim 4, characterized in that, The first pressure plate includes a first pressure plate head and a first pressure plate body. The first pressure plate body is arranged around the top outer periphery of the expansion sleeve. The first pressure plate head is threadedly connected to the first pressure plate body by a first screw.

6. The precision flexible adaptive clamping device as described in claim 5, characterized in that, The second pressure plate head is threadedly connected to the second pressure plate body by a second screw.

7. The precision flexible adaptive clamping device as described in claim 6, characterized in that, The first pressure plate body has a first guide hole, and the second pressure plate body has a second guide hole. The first guide hole and the second guide hole are in a straight line. One end of the guide rod passes through and is disposed in the first guide hole. The guide rod is detachably fixed by passing through the first guide hole with a guide rod screw. The other end of the guide rod slides into the second guide hole.

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