A clamping fixture for thin plate processing and its clamping method

Abstract

This invention discloses a clamping fixture and clamping method for thin plate processing. It includes a base, with two clamping blocks fitted on each side of the base. The two clamping blocks are fastened to the base via a locking shaft. The base and clamping blocks are respectively provided with mounting holes and through holes for the locking shaft to pass through, with a clearance fit between the locking shaft and the mounting holes. Symmetrical first inclined surfaces are provided on both sides of the base below the mounting holes. A second inclined surface, slidingly engaging with the first inclined surface, is provided at the lower end of each clamping block. A clamping head for holding the thin plate is provided at the upper end of each clamping block, with two clamping heads facing each other on both sides of the top surface of the base. This solution, through the cooperation of the base and the two clamping blocks, allows the two clamping heads to clamp the thin plate against the top surface of the base, thereby achieving rapid clamping and positioning of the thin plate. This improves the reliability and processing accuracy during thin plate processing, significantly enhances the quality of batch thin plate processing, and reduces processing costs.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to a clamping fixture and clamping method for thin plate machining. Background Technology

[0002] In the machining of thin plate parts, we often encounter plate structures that are difficult to clamp. Due to the clamping of thin areas, two beveled extrusion plates or similar methods are usually used for top clamping. However, instability is prone to occur during clamping, and the part may pop out of the machining area, affecting the dimensional and positional accuracy of the part. Therefore, the key to solving this problem is to prevent the thin plate parts from shifting, bending, or becoming hollow during clamping. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, this invention provides a clamping fixture and clamping method for thin plate processing, which solves the problem of poor stability when clamping and positioning thin plate parts.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] In a first aspect, a thin plate processing clamping fixture is provided, comprising a base, two clamping blocks respectively fitted on both sides of the base, and the two clamping blocks being fastened to the base by a locking shaft. The base and the clamping blocks are respectively provided with an assembly hole and a through hole for the locking shaft to pass through, and the locking shaft is clearance-fitted with the assembly hole. The base is provided with mutually symmetrical first inclined surfaces on both sides below the assembly hole. The lower end of the clamping block is provided with a second inclined surface that slides and fits against the first inclined surface. The upper end of the clamping block is provided with a clamping head for clamping the thin plate, and the two clamping heads are arranged facing each other on both sides of the top surface of the base.

[0006] Furthermore, the base has a limiting hole in the middle that is connected to and perpendicular to the assembly hole, and an anti-rotation pin is inserted through the limiting hole. A notch is provided on the side wall of the middle part of the locking shaft for abutting against the anti-rotation pin.

[0007] Furthermore, the clamp head is a cone head composed of an inclined upper and lower profile. The lower profile has stripes, and the side of the two clamping blocks that are close to each other is a concave surface composed of the lower profile, the inner side of the clamping block, and the second inclined surface.

[0008] Furthermore, a vertical clamping surface is provided on the clamping block located above the upper surface, and the two vertical clamping surfaces are arranged facing each other.

[0009] Furthermore, the two first inclined planes are arranged in an inverted V-shape.

[0010] Furthermore, concave stepped holes are provided at both ends of the assembly hole and at the end of the through hole near the assembly hole. Two springs are sleeved on the locking shaft, and the two ends of the springs abut against the two concave stepped holes between the assembly hole and the through hole, respectively.

[0011] Furthermore, one end of the locking shaft is provided with an abutment, the inner end of which is provided with a spherical step, and the other end of the locking shaft is provided with an external thread, on which a locking nut and a spherical washer are fitted. At the ends of the two through holes away from the assembly hole, there are spherical holes that are respectively matched with the spherical step and the spherical washer.

[0012] Secondly, a clamping method for a thin plate processing clamping fixture is provided, which includes the following steps:

[0013] S1: Assemble the clamping fixture for thin plate processing and fix the base on the worktable;

[0014] S2: Place the thin plate to be clamped on the top surface of the base. The operator presses the thin plate with one hand so that its bottom surface is in contact with the top surface of the base, and turns the locking nut with the other hand to make the two clamping blocks gradually approach each other and the second inclined surface is in contact with the first inclined surface and slides on the first inclined surface until the lower surface of the clamping head clamps the thin plate and presses the thin plate tightly against the top surface of the base.

[0015] Furthermore, before performing step S1, the inner and outer surfaces of the sheet to be clamped and each assembly component are cleaned with cleaning gasoline or alcohol; and grease is applied to the inner surface of the assembly hole, the first inclined surface, the second inclined surface, the spherical step and the surface of the spherical pad by applying grease with a silk cloth.

[0016] Furthermore, the base and clamping block are made of 30CrMnSiA alloy steel, and after quenching and tempering heat treatment, the surfaces of the base and clamping block are chrome-plated.

[0017] The beneficial effects of this invention are as follows:

[0018] This solution, through the cooperation of the base and two clamping blocks, allows the two clamping heads to clamp the thin plate from top to top and press the thin plate firmly against the top surface of the base, thereby achieving rapid clamping and positioning of the thin plate. Compared with tooling that simply clamps from top to bottom, this solution can achieve more stable clamping and positioning for flat thin plates, angled thin plates, and inclined thin plates, making the thin plate less prone to displacement. This improves the reliability and processing accuracy of thin plate processing, significantly improves the quality of batch processing of thin plates, and reduces processing costs. Attached Figure Description

[0019] Figure 1 A schematic diagram of the fixture for thin plate processing.

[0020] Figure 2 An exploded view of the clamping fixture for thin plate processing.

[0021] Figure 3 A side view of a clamping fixture for thin sheet machining.

[0022] Figure 4 This is a schematic diagram of the locking shaft.

[0023] Figure 5 This is a cross-sectional view of the clamping block.

[0024] Among them, 1. base, 2. clamping block, 3. locking shaft, 4. assembly hole, 5. through hole, 6. first inclined surface, 7. second inclined surface, 8. pliers head, 9. limiting hole, 10. anti-rotation pin, 11. notch groove, 12. upper profile, 13. lower profile, 14. vertical pliers face, 15. concave stepped hole, 16. spring, 17. abutment joint, 18. spherical step, 19. external thread, 20. locking nut, 21. spherical washer, 22. spherical hole. Detailed Implementation

[0025] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0026] like Figures 1 to 3 As shown, the thin plate processing clamping fixture of this solution includes a base 1, with two clamping blocks 2 respectively fitted on both sides of the base 1, and the two clamping blocks 2 are fastened to the base 1 by a locking shaft 3. The base 1 and the clamping blocks 2 are respectively provided with an assembly hole 4 and a through hole 5 to facilitate the passage of the locking shaft 3, and the locking shaft 3 and the assembly hole 4 are clearance fit. The two sides of the base 1 below the assembly hole 4 are provided with mutually symmetrical first inclined surfaces 6, and the two first inclined surfaces 6 are arranged in an inverted V-shape. The lower end of the clamping block 2 is provided with a second inclined surface 7 that slides and fits against the first inclined surface 6. The upper end of the clamping block 2 is provided with a clamping head 8 for clamping the thin plate, and the two clamping heads 8 are arranged facing each other on both sides of the top surface of the base 1.

[0027] As an optional implementation method, such as Figure 2 and Figure 4As shown, a limiting hole 9 is provided in the middle of the base 1, which is connected to and perpendicular to the assembly hole 4. Both the limiting hole 9 and the assembly hole 4 are horizontally arranged. An anti-rotation pin 10 is provided through the limiting hole 9. A notch 11 for abutting the anti-rotation pin 10 is provided on the side wall of the middle part of the locking shaft 3. In particular, in order to reserve a vertical displacement gap between the locking shaft 3 and the assembly hole 4, the anti-rotation pin 10 is not attached to the bottom surface of the notch 11, but abuts against the side edge of the notch 11. This arrangement realizes the anti-rotation of the locking shaft 3. When the locking shaft 3 needs to move downward, the locking shaft 3 can automatically rotate under the action of the downward driving force and make the bottom surface of the notch 11 attach to the anti-rotation pin 10, thereby generating a downward displacement gap of the locking shaft 3.

[0028] As an optional implementation method, such as Figure 2 and Figure 4 As shown, one end of the locking shaft 3 is provided with an abutment 17, and the inner end of the abutment 17 is provided with a spherical step 18. The other end of the locking shaft 3 is provided with an external thread 19, and a locking nut 20 and a spherical washer 21 are fitted on the external thread 19. The two through holes 5 are provided with spherical holes 22 at the ends away from the assembly hole 4, which are respectively matched with the spherical step 18 and the spherical washer 21. The purpose of this arrangement is to cooperate with the first inclined surface 6 and the second inclined surface 7, so as to achieve uniform and stable floating clamping of the thin plate.

[0029] As an optional implementation method, such as Figure 5 As shown, the clamp head 8 is a cone head composed of an inclined upper surface 12 and a lower surface 13. The lower surface 13 is provided with stripes, which can be horizontal or diagonal stripes. The side of the two clamping blocks 2 that is close to each other is a concave surface composed of the lower surface 13, the inner side of the clamping block 2, and the second inclined surface 7.

[0030] As an optional implementation method, such as Figure 2 and Figure 5 As shown, concave stepped holes 15 are provided at both ends of the assembly hole 4 and at the end of the through hole 5 near the assembly hole 4. Two springs 16 are sleeved on the locking shaft 3. The two ends of the springs 16 abut against the two concave stepped holes 15 between the assembly hole 4 and the through hole 5, respectively. The two springs 16 can be axially tightened or rebounded evenly with their respective concave stepped holes 15 as support, so as to facilitate the rebound and reset of the clamping block 2.

[0031] The working principle of this solution will be explained in detail below:

[0032] When clamping and positioning the thin plate, by rotating the locking nut 20, the clamping block 2 can be gradually brought closer together, so that the lower profile 13 of the two clamping heads 8 clamp the thin plate placed on the top surface of the base 1. At the same time, due to the presence of the first inclined surface 6 and the second inclined surface 7, as the clamping block 2 gradually moves closer together, the second inclined surface 7 slides on the first inclined surface 6 and drives the clamping block 2 to move obliquely downward along the direction of the first inclined surface 6, so that the lower profile 13 of the two clamping heads 8 squeezes and pulls down the thin plate, thereby clamping and pressing the thin plate tightly against the top surface of the base 1, forming a stable and reliable clamping.

[0033] In particular, the length and width of the clamp head 8 can be modified accordingly. Where conditions permit, it can be designed as a replaceable component to accommodate more thin plate parts.

[0034] As an optional implementation, a vertical clamping surface 14 is provided on the clamping block 2 located above the upper surface 12, and the two vertical clamping surfaces 14 are arranged facing each other; when a thick and non-deformable thin plate only needs to be clamped from top to bottom, the thin plate can be placed on the two clamping heads 8, and the two vertical clamping surfaces 14 can be used to clamp the thin plate from top to bottom.

[0035] This solution also provides a clamping method for a thin plate machining clamping fixture, which includes the following steps:

[0036] S0: Clean the inner and outer surfaces of the clamped sheet and each assembly component using cleaning gasoline or alcohol; and apply lubricant to the inner surface of the assembly hole 4, the first inclined surface 6, the second inclined surface 7, the spherical step 18 and the spherical pad 21 by applying lubricant to the surface of the assembly hole 4 with a silk cloth.

[0037] S0: Clean the inner and outer surfaces of the clamped sheet and each assembly component using cleaning gasoline or alcohol; and apply lubricant to the inner surface of the assembly hole 4, the first inclined surface 6, the second inclined surface 7, the spherical step 18 and the spherical pad 21 by applying lubricant to the cloth.

[0038] S1: Assemble the thin plate processing clamping fixture and fix the base 1 on the worktable; the assembly process specifically includes: inserting the locking shaft 3 into the through hole 5 of the clamping block 2, and then inserting the spring 16; then inserting the locking shaft 3 into the assembly hole 4 of the base 1, and then sequentially guiding the spring 16, clamping block 2, ball pad 21, and locking shaft 3; after the two springs 16 have fallen into the corresponding concave step hole 15, maintain the tendency of the second inclined surface 7 of the clamping block 2 to fit with the first inclined surface 6 of the base 1, and screw the locking nut 20 into the external thread 19 of the locking shaft 3; adjust the position of the notch 11 on the locking shaft 3, and insert the anti-rotation pin 10 into the limiting hole 9; manually clamp the clamping blocks 2 located at both ends, visually observe the spring 16 and the clamping blocks 2, and keep the clamping blocks 2 in a flexible and tensionable state;

[0039] S2: Place the thin plate to be clamped on the top surface of the base 1. The operator presses the thin plate with one hand so that its bottom surface is in contact with the top surface of the base 1, and rotates the locking nut 20 with the other hand so that the two clamping blocks 2 gradually approach each other and the second inclined surface 7 is in contact with the first inclined surface 6 and slides on the first inclined surface 6 until the lower profile 13 of the clamping head 8 clamps the thin plate and presses the thin plate tightly against the top surface of the base 1.

[0040] As an optional implementation, both the base 1 and the clamping block 2 are made of 30CrMnSiA alloy steel, and after quenching and tempering heat treatment, the surfaces of the base 1 and the clamping block 2 are chrome-plated to obtain good comprehensive mechanical properties, stable structural dimensions and certain anti-corrosion function, while having a certain strength and hardness, which can effectively prevent the material from oxidizing and rusting.

[0041] In summary, this solution, through the cooperation of the base 1 and the two clamping blocks 2, enables the two clamping heads 8 to clamp the thin plate against each other and press the thin plate firmly against the top surface of the base 1, thereby achieving rapid clamping and positioning of the thin plate. At the same time, this solution can achieve more stable clamping and positioning for flat thin plates, angled thin plates, and inclined thin plates, making the thin plate less prone to displacement, thereby improving the reliability and processing accuracy of thin plate processing, significantly improving the quality of batch processing of thin plates, and reducing processing costs.

Claims

1. A clamping fixture for thin plate processing, characterized in that, The device includes a base, with two clamping blocks fitted on each side of the base. The two clamping blocks are fastened to the base via a locking shaft. The base and the clamping blocks are respectively provided with an assembly hole and a through hole to facilitate the passage of the locking shaft. The locking shaft is clearance-fitted with the assembly hole. The base has symmetrical first inclined surfaces on both sides below the assembly hole. The lower end of the clamping block has a second inclined surface that slides and fits against the first inclined surface. The upper end of the clamping block is provided with a clamping head for clamping a thin plate. The two clamping heads are arranged facing each other on both sides of the top surface of the base.

2. The thin plate processing clamping fixture according to claim 1, characterized in that, The base has a limiting hole in the middle that is connected to and perpendicular to the assembly hole. An anti-rotation pin is inserted through the limiting hole. A notch is provided on the side wall of the middle part of the locking shaft for abutting against the anti-rotation pin.

3. The thin plate processing clamping fixture according to claim 1, characterized in that, The clamp head is a cone head composed of an inclined upper and lower profile. The lower profile has stripes. The side of the two clamping blocks that are close to each other is a concave surface composed of the lower profile, the inner side of the clamping block, and the second inclined surface.

4. The thin plate processing clamping fixture according to claim 3, characterized in that, The clamping block located above the upper surface is provided with vertical clamping surfaces, and the two vertical clamping surfaces are arranged facing each other.

5. The thin plate processing clamping fixture according to claim 1, characterized in that, The two first inclined planes are arranged in an inverted V-shape.

6. The thin plate processing clamping fixture according to claim 1, characterized in that, Concave stepped holes are provided at both ends of the assembly hole and at the end of the through hole near the assembly hole. Two springs are sleeved on the locking shaft, and the two ends of the springs abut against the two concave stepped holes between the assembly hole and the through hole, respectively.

7. The thin plate processing clamping fixture according to claim 1, characterized in that, One end of the locking shaft is provided with an abutment, and the inner end of the abutment is provided with a spherical step. The other end of the locking shaft is provided with an external thread, and a locking nut and a spherical washer are fitted on the external thread. The two through holes are provided with spherical holes at the ends away from the assembly hole, which are respectively adapted to the spherical step and the spherical washer.

8. A clamping method using the thin plate processing clamping fixture as described in claim 7, characterized in that, Includes the following steps: S1: Assemble the clamping fixture for thin plate processing and fix the base on the worktable; S2: Place the thin plate to be clamped on the top surface of the base. The operator presses the thin plate with one hand so that its bottom surface is in contact with the top surface of the base, and turns the locking nut with the other hand to make the two clamping blocks gradually approach each other and the second inclined surface is in contact with the first inclined surface and slides on the first inclined surface until the clamping head clamps the thin plate and presses the thin plate tightly against the top surface of the base.

9. The clamping method of the thin plate processing clamping fixture according to claim 8, characterized in that, Before performing step S1, the inner and outer surfaces of the sheet metal to be clamped and each assembly component are cleaned with cleaning gasoline or alcohol; and grease is applied to the inner surface of the assembly hole, the first inclined surface, the second inclined surface, the spherical step and the surface of the spherical pad by applying grease with a silk cloth.

10. The clamping method of the thin plate processing clamping fixture according to claim 8, characterized in that, The base and clamping block are made of 30CrMnSiA alloy steel and are chrome-plated on the surface of the base and clamping block after quenching and tempering heat treatment.

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