Auxiliary inner support floating three-jaw double-clamping fixture

Abstract

The utility model relates to the technical field of thin-wall product machining, in particular to an auxiliary inner support floating three-jaw double-clamping clamp. After the positioning jig conducts coarse positioning on the thin-wall product, the driving component drives the tensioning component to conduct tensioning positioning on the inner wall of the thin-wall product, the pulling component synchronously drives the clamping components on the multiple pull rods to conduct clamping positioning on the outer wall of the thin-wall product, the outer clamping assembly and the inner clamping assembly are adopted to conduct double-action double-clamping, and the clamping efficiency is greatly improved. Internal and external clamping forces are mutually offset, and the workpiece is almost free of deformation; compared with a traditional single-clamping clamp, the clamping deformation is smaller, the roundness precision after machining is high, meanwhile, the machining and clamping precision of subsequent procedures can be guaranteed, and the product quality is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thin-wall product processing, in particular to an auxiliary inner-support floating three-claw double-clamping fixture. Background Art

[0002] When traditional multi-point clamping fixtures clamp the outside of thin-walled products, the contact area of the workpiece is small. Due to the high strength of the thin-walled products themselves, it is impossible to apply a large clamping force to them. The clamping force on the workpiece is not strong enough, and the positioning accuracy is not high. At the same time, during the rotation process, it is easy to cause a large centrifugal force in the cutting, which makes the cutting more unstable and affects the processing quality of the thin-walled products. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an auxiliary inner support floating three-jaw double clamping fixture with double action and double clamping, in which the inner and outer clamping forces offset each other, the workpiece has almost no deformation, and the roundness accuracy after processing is high.

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

[0005] An auxiliary internal support floating three-jaw double-clamping fixture, comprising:

[0006] base;

[0007] A positioning jig is provided on the base and is used to position thin-walled products;

[0008] An inner clamping assembly is provided on the base and is provided below the positioning fixture. The inner clamping assembly includes a driving component and a tensioning component. The tensioning component is provided on the base and is drivingly connected to the tensioning component. The driving component drives the tensioning component to tighten and position the inner wall of the thin-walled product.

[0009] An external clamping assembly is arranged on the base, and the external clamping assembly includes multiple pull rods. An inclined pull hole is provided on the base, and the pull rod is passed through the inclined pull hole. One end of the pull rod is connected to the clamping component, and the other end is driven and connected to the pulling component. The pulling component is used to synchronously drive the clamping components on the multiple pull rods to clamp and position the outer wall of the thin-walled product.

[0010] In one embodiment of the present invention, the clamping component includes a clamping block, the clamping block is provided with a clamping end, the clamping end is provided with a clamping surface matching the outer wall of the thin-walled product, and the clamping surface is provided with anti-slip lines.

[0011] In one embodiment of the present invention, an adjustment block is provided on the pull rod, a T-slot is provided on the adjustment block, a T-bolt is provided in the T-slot, the clamping block is slidably provided on the T-slot, and the T-bolt is connected to the clamping block.

[0012] In one embodiment of the present utility model, the pulling component includes a pulling rack, a guide cavity is provided on the base, the pulling rack is slidably arranged in the guide cavity, a pushing trough is provided on the pulling rack, the free end of the pulling rod is passed through the pushing trough, the pushing inclined surface on the pushing trough, a pulling rod is provided on the pulling rack, and the pulling rod is passed through the guide hole of the base.

[0013] In one embodiment of the present invention, the tensioning component includes an expansion sleeve and a tapered body, the expansion sleeve is evenly provided with a plurality of clamping arms, the clamping arms are provided with a clamping block, the outer wall of the clamping block is provided with a positioning surface matching the inner wall of the thin-walled product, the inner wall of the clamping block is provided with a guide slope, the tapered body is arranged in the expansion sleeve, the edge of the tapered body is provided with a clamping slope, the clamping slope is connected to the guide slope, and the tapered body is drivingly connected to the driving component.

[0014] In one embodiment of the present utility model, the driving component includes a driving shaft, which passes through a guide hole on the base and is connected to the tapered body. A limiting plate is provided at the free end of the driving shaft, and a spring is sleeved on the driving shaft. One end of the spring abuts against the limiting plate, and the other end abuts against the base.

[0015] In one embodiment of the present invention, the inner clamping assembly further includes an unlocking rod, an unlocking hole is provided on the pulling rack, and the unlocking rod passes through the unlocking hole and is arranged opposite to the limiting plate.

[0016] In one embodiment of the present invention, a sliding groove is provided on the base, a sliding block is slidably provided on the sliding groove, the tapered body is arranged on the sliding block, the guide hole is arranged on the bottom surface of the sliding groove, and a sliding sealing ring is provided between the sliding groove and the sliding block.

[0017] In one embodiment of the present invention, a reference plate is provided on the positioning surface, a reference surface is provided on the reference plate, and the reference surface is arranged opposite to the clamping component.

[0018] In one embodiment of the present invention, the positioning fixture includes a plurality of positioning frames, which are arranged around the tensioning component. A support block is provided on the positioning frame, a limiting groove is provided on the support block, and reference blocks are provided at both ends of the support block.

[0019] Beneficial effects of the utility model:

[0020] After the positioning fixture of the utility model roughly positions the thin-walled product, the driving component drives the tensioning component to tighten and position the inner wall of the thin-walled product, and the pulling component then synchronously drives the clamping components on multiple pull rods to clamp and position the outer wall of the thin-walled product. The outer clamping component and the inner clamping component are used for double action and double clamping. The inner and outer clamping forces offset each other, and the workpiece has almost no deformation. Compared with the traditional single clamping fixture, the clamping deformation is smaller, and the roundness accuracy after processing is high. At the same time, it can also ensure the processing and clamping accuracy of subsequent processes, further improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of an auxiliary internal support floating three-jaw double-clamping fixture of the utility model.

[0022] Figure 2 It is a schematic diagram of a positioning fixture of the present utility model.

[0023] Figure 3 It is a cross-sectional view of the present utility model.

[0024] Explanation of the numbers in the figure: 1. Base; 2. Positioning fixture; 21. Positioning frame; 22. Limiting groove; 23. Reference block; 3. Clamping component; 31. Clamping block; 32. Clamping end; 33. Anti-slip groove; 34. Adjustment block; 35. T-slot; 4. Tensioning component; 41. Expansion sleeve; 42. Clamping block; 43. Positioning surface; 44. Reference plate; 45. Tapered body; 46. Clamping slope; 47. Sliding block; 48. Sliding groove; 5. Drive shaft; 52. Spring; 53. Limiting plate; 54. Unlocking rod; 6. Pull rod; 61. Pulling frame; 62. Pulling rod; 63. Joint bearing; 64. Pushing slope. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0026] Reference Figure 1-3 As shown, an auxiliary internal support floating three-jaw double-clamping fixture includes:

[0027] Base 1;

[0028] A positioning jig 2 is provided on the base 1 and is used to position thin-walled products;

[0029] An inner clamping assembly is provided on the base 1 and is provided below the positioning fixture 2. The inner clamping assembly includes a driving component and a tensioning component 4. The tensioning component 4 is provided on the base 1. The driving component is connected to the tensioning component 4 in a driving manner. The driving component drives the tensioning component 4 to tighten and position the inner wall of the thin-walled product.

[0030] An external clamping assembly is arranged on the base 1, and the external clamping assembly includes multiple pull rods 6. An oblique pull hole is provided on the base 1, and the pull rod 6 is passed through the oblique pull hole. One end of the pull rod 6 is connected to the clamping part 3, and the other end is driven and connected to the pulling part. The pulling part is used to synchronously drive the clamping parts 3 on the multiple pull rods 6 to clamp and position the outer wall of the thin-walled product.

[0031] After the positioning fixture 2 of the present invention roughly positions the thin-walled product, the driving component drives the tensioning component 4 to tighten and position the inner wall of the thin-walled product, and the pulling component then synchronously drives the clamping components 3 on multiple pull rods 6 to clamp and position the outer wall of the thin-walled product. The outer clamping component and the inner clamping component are used for double action and double clamping. The inner and outer clamping forces offset each other, and the workpiece has almost no deformation. Compared with the traditional single clamping fixture, the clamping deformation is smaller, and the roundness accuracy after processing is high. At the same time, it can also ensure the processing and clamping accuracy of subsequent processes, further improving product quality.

[0032] In one embodiment of the present invention, the clamping component 3 includes a clamping block 31, the clamping block 31 is provided with a clamping end 32, the clamping end 32 is provided with a clamping surface matching the outer wall of the thin-walled product, and the clamping surface is provided with anti-slip grooves 33.

[0033] Specifically, the clamping surface on the clamping block 31 abuts against the outer wall of the product, thereby clamping and positioning the outer wall of the thin-walled product. The anti-slip pattern 33 can prevent the thin-walled product from shaking during processing, which affects the processing quality.

[0034] In one embodiment of the present invention, an adjustment block 34 is provided on the pull rod 6, a T-slot 35 is provided on the adjustment block 34, a T-bolt is provided in the T-slot 35, the clamping block 31 is slidably provided on the T-slot 35, and the T-bolt is connected to the clamping block 31.

[0035] Specifically, the T-bolt is connected to the clamping block 31 , and the clamping block 31 is slidably arranged on the T-slot 35 , so that the position of the clamping block 31 can be adjusted. The clamping block 31 is applicable to thin-walled products of various specifications and has a wide range of applications.

[0036] In one embodiment of the present utility model, the pulling component includes a pulling rack 61, a guide cavity is provided on the base 1, the pulling rack 61 is slidably arranged in the guide cavity, a pushing groove is provided on the pulling rack 61, the free end of the pulling rod 6 is passed through the pushing groove, a pushing slope 64 is provided on the pushing groove, a pulling rod 62 is provided on the pulling rack 61, and the pulling rod 62 is passed through the guide hole of the base 1.

[0037] Specifically, another driving source is connected to the pulling rod 62 on the pulling rack 61. The driving source pulls the pulling rack 61 to move, thereby synchronously driving multiple pulling rods 6 to move along the joint bearing 63, which can ensure that each clamping component 3 synchronously clamps the outer wall of the product to avoid deformation of thin-walled products.

[0038] In one embodiment of the present invention, the tensioning component 4 includes an expansion sleeve 41 and a tapered body 45, the expansion sleeve 41 is evenly provided with a plurality of clamping arms, the clamping arms are provided with a clamping block 42, the outer wall of the clamping block 42 is provided with a positioning surface 43 matching the inner wall of the thin-walled product, the inner wall of the clamping block 42 is provided with a guide slope, the tapered body 45 is arranged in the expansion sleeve 41, the edge of the tapered body 45 is provided with a clamping slope 46, the clamping slope 46 is connected to the guide slope, and the tapered body 45 is drivingly connected to the driving component.

[0039] Specifically, the conical body 45 connected to the drive shaft 5 moves, so that the clamping bevel 46 on the edge of the conical body 45 and the guide bevel on the inner wall of the clamping block 42 move relative to each other, and the diameter of the expansion sleeve 41 is increased so that the positioning surface 43 on the outer wall of the clamping block 42 can tighten and position the inner wall of the thin-walled product. The expansion sleeve 41 performs auxiliary clamping, the clamping deformation is smaller, and the precision after processing is higher, ensuring that the processing allowance of subsequent processes is smaller and more uniform, and the processing efficiency is higher.

[0040] In one embodiment of the present utility model, the driving component includes a driving shaft 5, which passes through a guide hole on the base 1 and is connected to the tapered body 45. A limiting plate 53 is provided at the free end of the driving shaft 5, and a spring 52 is sleeved on the driving shaft 5. One end of the spring 52 abuts against the limiting plate 53, and the other end abuts against the base 1.

[0041] Specifically, under the reaction force of the spring 52, the conical body 45 connected to the drive shaft 5 is pushed to move, so that the clamping bevel 46 on the edge of the conical body 45 and the guide bevel on the inner wall of the clamping block 42 move relative to each other, and the diameter of the expansion sleeve 41 is increased so that the positioning surface 43 on the outer wall of the clamping block 42 can tighten and position the inner wall of the thin-walled product. No additional power is required to clamp the inner wall of the thin-walled product. Double clamping reduces clamping deformation and improves the roundness of the product.

[0042] In one embodiment of the present invention, the inner clamping assembly further includes an unlocking rod 54 . An unlocking hole is provided on the pulling rack 61 . The unlocking rod 54 passes through the unlocking hole and is disposed opposite to the limiting plate 53 .

[0043] Specifically, the fixture is installed on the processing equipment, and the unlocking rod 54 is slid into the unlocking hole on the pulling rack 61. The unlocking rod 54 is connected to a power source drive to push the unlocking rod 54 toward the limit plate 53, and push the limit plate 53 toward the positioning fixture 2, compressing the spring 52, and at the same time driving the tapered body 45 to move, so that the clamping arm on the expansion sleeve 41 moves toward the tapered body 45, thereby reducing the diameter of the expansion sleeve 41, making it easier to assemble thin-walled products on the fixture, reducing clamping deformation, and improving product roundness.

[0044] In one embodiment of the present utility model, a sliding groove 48 is provided on the base 1, a sliding block 47 is slidably provided on the sliding groove 48, the tapered body 45 is arranged on the sliding block 47, the guide hole is arranged on the bottom surface of the sliding groove 48, and a sliding sealing ring is provided between the sliding groove 48 and the sliding block 47.

[0045] Specifically, a sliding block 47 is slidably provided on the sliding groove 48, and the tapered body 45 is arranged on the sliding block 47. The sliding groove 48 can guide the movement of the tapered body 45, ensuring the synchronous expansion and contraction of each clamping arm on the expansion sleeve 41, which can effectively avoid deformation of thin-walled products.

[0046] In an embodiment of the present invention, a reference plate 44 is provided on the positioning surface 43 , and a reference surface is provided on the reference plate 44 . The reference surface is arranged opposite to the clamping component 3 .

[0047] Specifically, the reference surface is arranged opposite to the clamping component 3, and the inside and outside of the thin-walled product are clamped synchronously by the reference surface and the clamping surface on the clamping block 31. The internal and external clamping forces offset each other, and the workpiece is almost not deformed.

[0048] In one embodiment of the present invention, the positioning fixture 2 includes a plurality of positioning frames 21, which are arranged around the tensioning component 4. A support block is provided on the positioning frame 21, a limiting groove 22 is provided on the support block, and reference blocks 23 are provided at both ends of the support block.

[0049] Specifically, the annular thin-walled product is placed on the positioning jig 2, and the product is roughly positioned by the support blocks on multiple positioning frames 21, and the product is placed on the reference blocks 23 set at both ends of the support blocks, so that each position of the product is on the same reference plane, ensuring the accuracy of the product on the positioning jig 2 and improving the quality of subsequent processing.

[0050] Usage process

[0051] The clamp is installed on the processing equipment, and the unlocking rod 54 is slid into the unlocking hole on the pulling frame 61. The unlocking rod 54 is connected to a power source drive, pushing the unlocking rod 54 toward the limit plate 53, and pushing the limit plate 53 toward the positioning fixture 2, compressing the spring 52, and at the same time driving the tapered body 45 to move, so that the clamping arm on the expansion sleeve 41 moves toward the tapered body 45, thereby reducing the diameter of the expansion sleeve 41, and placing the annular thin-walled product on the positioning fixture 2, and roughly positioning the product through the support blocks on multiple positioning frames 21, and the product is placed on the reference blocks 23 set at both ends of the support blocks to ensure the accuracy of the product on the positioning fixture 2, the positioning surface 43 on the outer wall of the clamping block 42 is opposite to the inner wall of the thin-walled product, and the power source pushes the unlocking rod 54 to move away from the limit plate 53, and under the reaction force of the spring 52, pushes the taper connected to the drive shaft 5. The body 45 moves, so that the clamping bevel 46 on the edge of the tapered body 45 and the guide bevel on the inner wall of the clamping block 42 move relative to each other, and the diameter of the expansion sleeve 41 is increased so that the positioning surface 43 on the outer wall of the clamping block 42 tightens and positions the inner wall of the thin-walled product. Another driving source is connected to the pulling rod 62 on the pulling rack 61. The driving source pulls the pulling rack 61 to move, thereby synchronously driving multiple pulling rods 6 to move along the joint bearing, so that the clamping surface on the clamping block 31 abuts against the outer wall of the product, thereby clamping and positioning the outer wall of the thin-walled product. It is specially designed for the processing of thin film parts. The double action and double clamping reduce clamping deformation and improve the roundness of the product. The internal and external clamping forces of the thin-walled product offset each other, and the workpiece has almost no deformation. Compared with the traditional single clamping fixture, the clamping deformation is smaller, and the roundness after processing is increased by more than 3 times. It can also ensure the processing and clamping accuracy of subsequent processes, and the product quality is improved by more than 3 times.

[0052] The above-described embodiments are merely preferred embodiments for the purpose of fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

Claims

1. An auxiliary internal support floating three-jaw double clamping fixture, characterized in that: include: base; A positioning jig is provided on the base and is used to position thin-walled products; An inner clamping assembly is provided on the base and is provided below the positioning fixture. The inner clamping assembly includes a driving component and a tensioning component. The tensioning component is provided on the base and is drivingly connected to the tensioning component. The driving component drives the tensioning component to tighten and position the inner wall of the thin-walled product. An external clamping assembly is arranged on the base, and the external clamping assembly includes multiple pull rods. An inclined pull hole is provided on the base, and the pull rod is passed through the inclined pull hole. One end of the pull rod is connected to the clamping component, and the other end is driven and connected to the pulling component. The pulling component is used to synchronously drive the clamping components on the multiple pull rods to clamp and position the outer wall of the thin-walled product.

2. The auxiliary inner support floating three-jaw double-clamping fixture according to claim 1 is characterized in that: The clamping component includes a clamping block, the clamping block is provided with a clamping end, the clamping end is provided with a clamping surface matching the outer wall of the thin-walled product, and the clamping surface is provided with anti-slip lines.

3. The auxiliary inner support floating three-jaw double clamping fixture according to claim 2, characterized in that: The pull rod is provided with an adjustment block, the adjustment block is provided with a T-slot, a T-bolt is provided in the T-slot, the clamping block is slidably arranged on the T-slot, and the T-bolt is connected to the clamping block.

4. The auxiliary inner support floating three-jaw double clamping fixture according to claim 1, characterized in that: The pulling component includes a pulling rack, a guide cavity is provided on the base, the pulling rack is slidably arranged in the guide cavity, a pushing trough is provided on the pulling rack, the free end of the pulling rod is passed through the pushing trough, the pushing inclined surface on the pushing trough, a pulling rod is provided on the pulling rack, and the pulling rod is passed through the guide hole of the base.

5. The auxiliary inner support floating three-jaw double-clamping fixture according to claim 4 is characterized in that: The tensioning component includes an expansion sleeve and a tapered body. A plurality of clamping arms are evenly arranged on the expansion sleeve. A clamping block is arranged on the clamping arm. A positioning surface matching the inner wall of the thin-walled product is arranged on the outer wall of the clamping block. A guide slope is arranged on the inner wall of the clamping block. The tapered body is arranged in the expansion sleeve. A clamping slope is arranged on the edge of the tapered body. The clamping slope is connected to the guide slope. The tapered body is drivingly connected to the driving component.

6. The auxiliary inner support floating three-jaw double-clamping fixture according to claim 5, characterized in that: The driving component includes a driving shaft, which passes through a guide hole on the base and is connected to the tapered body. A limiting plate is provided at the free end of the driving shaft, and a spring is sleeved on the driving shaft. One end of the spring abuts against the limiting plate, and the other end abuts against the base.

7. The auxiliary inner support floating three-jaw double-clamping fixture according to claim 6, characterized in that: The inner clamping assembly also includes an unlocking rod. An unlocking hole is opened on the pulling rack. The unlocking rod passes through the unlocking hole and is arranged opposite to the limiting plate.

8. The auxiliary inner support floating three-jaw double-clamping fixture according to claim 6, characterized in that: A sliding groove is provided on the base, a sliding block is slidably provided on the sliding groove, the tapered body is provided on the sliding block, the guide hole is provided on the bottom surface of the sliding groove, and a sliding sealing ring is provided between the sliding groove and the sliding block.

9. The auxiliary inner support floating three-jaw double-clamping fixture according to claim 5, characterized in that: A reference plate is provided on the positioning surface, a reference surface is provided on the reference plate, and the reference surface is arranged opposite to the clamping component.

10. The auxiliary inner support floating three-jaw double-clamping fixture according to claim 1, characterized in that: The positioning fixture includes a plurality of positioning frames, which are arranged around the tensioning component. The positioning frames are provided with support blocks, which are provided with limiting grooves, and reference blocks are provided at both ends of the support blocks.

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