Self-referenced positioning and clamping device for sheet metal stamping and welding parts

Abstract

The present invention discloses a self-referenced positioning and clamping device for thin-plate stamping and welding parts, comprising: a clamping body, a support positioning block and a bow-shaped clamp. The clamping body is provided with support bars on the left and right, the middle section of the left support bar is a clearance notch, and the top of the support bar is a support positioning reference plane. The support positioning block is connected across the support bars arranged on the left and right. The bow-shaped clamp clamps the top and bottom of the support positioning block and fits the surface of the part with the bottom clamping and positioning surface of the support positioning block. First, clamp the two outer support positioning blocks, process the part that is not blocked by the support positioning blocks, remove the two outer support positioning blocks, and then clamp the two inner support positioning blocks, and process the part that is not blocked by the two inner support positioning blocks.

Description

Technical Field

[0001] The invention relates to mechanical measurement, in particular to a positioning and clamping device for a thin plate punching and welding part which takes itself as a reference. Background Art

[0002] See also Figure 1 In some machines, there is a part 6 with a thin plate punching and welding structure, and its surface A has a high flatness requirement and needs to be machined (such as milling, etc.). However, since the part is a special-shaped structural part formed by stamping and welding of a thin plate, there is no good surface on the part surface that can be used as the processing reference surface for processing surface A; universal pads, screws, etc. are used for clamping. Due to the uneven surface of the part, the clamping process is prone to interference between the workpiece and the fixture, which makes clamping inconvenient and inaccurate; the main body of the part is a thin plate. Even if it is welded into a structural part, the rigidity of the part is poor. The processing process is very likely to cause excessive deformation of the part due to cutting force, and dimensional elements such as flatness are difficult to process to meet the requirements. In order to effectively solve the above problems, it is necessary to find a processing method suitable for the part. Therefore, it is necessary to select the A surface to be processed as the processing reference surface, and at the same time, design a device that can improve the rigidity of the part and can quickly and accurately position and clamp it. Summary of the invention

[0003] The self-referenced positioning and clamping device for thin plate punching and welding parts disclosed in the present invention can quickly and accurately position and clamp thin plate punching and welding structural parts, so that the parts can be positioned and clamped for processing using themselves as the reference, thereby improving processing efficiency.

[0004] The thin plate punching and welding part self-referenced positioning and clamping device disclosed in the present invention comprises a clamping body, a supporting positioning block and a bow-shaped clamp;

[0005] The clamp body is provided with support bars on the left and right, the middle section of the left support bar is a clearance gap, and the top of the support bar is a support positioning reference plane;

[0006] The support positioning block is connected across the support bars arranged on the left and right sides;

[0007] The bow clamp holds the top and bottom of the support block and fits the surface of the part to the bottom clamping and positioning surface of the support block.

[0008] Furthermore, a screw hole is provided on the bow-shaped clamp, and a screw passes through the screw hole to realize the clamping connection between the supporting positioning block and the part.

[0009] Furthermore, a T-slot is provided on the top of the support bar of the clamp body, and a nut is placed in the T-slot; two fixing holes are provided on the support positioning block; screws are passed through the fixing holes and screwed into the nuts to fix the support positioning block between the support bars;

[0010] Furthermore, the center distance between the left and right T-slots for connecting with the support positioning block is the same as the hole distance between the two fixing holes on the support positioning block.

[0011] Furthermore, a clearance notch is provided at the bottom of the supporting positioning block, and the clearance notch is adapted to the protruding portion of the corresponding position on the part.

[0012] Furthermore, the opening distance in the middle of the bow-shaped clamp is greater than the sum of the thickness of the supporting positioning block and the thickness of the part.

[0013] Furthermore, the support bar height of the support bar is greater than the height of the part, and the inner distance between the two support bars is greater than the outer length of the part.

[0014] Furthermore, the supporting positioning reference plane of the clamping body and the bottom clamping positioning surface of the supporting positioning block are processed by grinding.

[0015] The method of using the above-mentioned thin plate punching and welding part self-referenced positioning and clamping device comprises the following steps:

[0016] Step 1: Clamp and align the clamp body on the processing equipment;

[0017] Step 2: A clearance notch is set at the bottom of the support and positioning block for rough positioning, and a feeler gauge is used to detect the gap between the surface of the part and the clamping and positioning surface at the bottom of the support and positioning block to ensure that the two planes are in effective contact and reliable positioning, and the screws are passed through the screw holes to achieve the clamping connection between the support and positioning block and the part;

[0018] Step 3: Use nuts and screws to press the parts connected to the two outer support and positioning blocks onto the clamp body through the T-slot; use a feeler gauge to detect the gap between the support and positioning reference plane of the clamp body and the bottom clamping and positioning surface of the support and positioning block to ensure that the two planes are in effective contact and reliable positioning; use processing equipment to process the surface of the parts that are not blocked by the support and positioning blocks;

[0019] Step 5: Press the two inner support blocks onto the clamp body using nuts and screws for T-slots, and then disassemble the bow clamps from the two outer support blocks to the two inner support blocks one by one, clamp the surface of the part that has been processed in step 3, and disassemble the two outer support blocks;

[0020] Step six, use processing equipment to process the unprocessed part of the surface of the part.

[0021] The beneficial technical effects of the present invention are:

[0022] 1) It only supports the positioning block and the clamp body to position and clamp the parts, with a simple structure, easy device manufacturing and low cost.

[0023] 2) By adopting the method of one inner support positioning and one outer support positioning, the parts can be clamped and processed with their own reference, which saves reference adjustment and comparison of tooling structure and improves processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the structure of part 6;

[0025] Figure 2 yes Figure 1 A top view of

[0026] Figure 3 1 is a schematic diagram of the structure of the clamp body 1;

[0027] Figure 4 yes Figure 3 A top view of

[0028] Figure 5 It is a structural schematic diagram of the support positioning block 2;

[0029] Figure 6 yes Figure 5 A top view of

[0030] Figure 7 It is a schematic diagram of the structure of the bow clamp 5;

[0031] Figure 8 yes Figure 7 AA view;

[0032] Fig. 9 It is a schematic diagram of the work of clamping part 6 on the positioning clamping device;

[0033] Fig.10 yes Fig. 9 A top view of

[0034] Among them, part-6, surface-A, overall length-L6, height-L7, clamp body-1, support positioning reference plane-B, clearance gap-X, center distance-L, support bar height-L1, inner distance-L2, support positioning block-2, screw-3, nut-4, bottom clamping positioning surface-C, clearance gap-P, hole spacing-L3, thickness-L4, fixing hole-D1, bow clamp-5, screw hole-D2, opening distance-L5. DETAILED DESCRIPTION

[0035] The present invention is described in detail below with reference to the accompanying drawings.

[0036] like Figures 1 to 10 As shown, the thin plate punching and welding part self-referenced positioning and clamping device disclosed in the present invention comprises: a clamp body 1, a supporting positioning block 2 and a bow clamp 5;

[0037] The clamp body 1 is provided with support bars on the left and right, the middle section of the left support bar is a clearance notch X, and the top of the support bar is the support positioning reference plane B; the support positioning block 2 is connected between the support bars arranged on the left and right; the arch clamp 5 clamps the top and bottom of the support positioning block 2 and fits the surface A of the part 6 with the bottom clamping positioning surface C of the support positioning block 2. The support positioning reference plane B, as the reference plane for support positioning, is mainly used for clamping and positioning with the bottom clamping positioning surface C of the support positioning block 2, and should have a small flatness error and surface accuracy, and should be finely processed by grinding.

[0038] The bow-shaped clamp 5 is provided with a screw hole D2, and the screw 3 passes through the screw hole D2 to realize the clamping connection between the support positioning block 2 and the part 6. The specification of the screw hole D2 should match that of the screw 3.

[0039] A T-slot is provided on the top of the support bar of the clamp body 1, and a nut 4 is placed in the T-slot; two fixing holes D1 are provided on the support positioning block 2; a screw 3 passes through the fixing hole D1 and is screwed into the nut 4 to fix the support positioning block 2 between the support bars;

[0040] The center distance L of the T-shaped grooves at the left and right ends for connecting with the supporting and positioning block 2 is the same as the hole distance L3 of the two fixing holes D1 on the supporting and positioning block 2 .

[0041] A clearance notch P is provided at the bottom of the support positioning block 2 , and the clearance notch P is adapted to the protruding portion of the corresponding position on the part 6 .

[0042] The opening distance L5 in the middle of the bow-shaped clamp 5 is slightly larger than the sum of the thickness L4 of the support positioning block 2 and the thickness of the component 6, so as to ensure that the bow-shaped clamp 5 can be smoothly disassembled and assembled when the support positioning block 2 and the component 6 are connected.

[0043] The support bar height L1 of the support bar is greater than the height L7 of the part 6 , and the inner distance L2 between the two support bars is greater than the outer length L6 of the part 6 .

[0044] The method of using a positioning clamping device with a thin plate punching and welding part as a reference comprises the following steps:

[0045] Step 1: Clamp and align the clamp body 1 on the processing equipment;

[0046] Step 2: A clearance notch P is set at the bottom of the support and positioning block 2 for rough positioning, and a feeler gauge is used to detect the gap between the surface A of the part 6 and the clamping and positioning surface C at the bottom of the support and positioning block 2 to ensure that the two planes are in effective contact and reliable positioning. The screw 3 passes through the screw hole D2 to achieve the clamping connection between the support and positioning block 2 and the part 6;

[0047] Step three, press the part 6 connected to the two outer support and positioning blocks 2 onto the clamp body 1 using nuts 4 and screws 3 through the T-slot; use a feeler gauge to detect the gap between the support and positioning reference plane B of the clamp body 1 and the bottom clamping and positioning surface C of the support and positioning block 2 to ensure that the above two planes are effectively in contact and reliably positioned; use processing equipment to process the surface A of the part 6 that is not blocked by the support and positioning block 2;

[0048] Step 5: Press the two inner support and positioning blocks 2 onto the clamp body 1 using nuts 4 and screws 3 for T-slots, and then disassemble the bow clamps 5 from the two outer support and positioning blocks 2 to the two inner support and positioning blocks 2 one by one to clamp the surface A of the part 6 that has been processed in step 3, and disassemble the two outer support and positioning blocks 2;

[0049] Step six, using processing equipment to process the unprocessed portion of surface A of part 6.

Claims

1. A positioning method for a thin plate punching and welding part with a self-referenced positioning and clamping device, characterized in that: The positioning and clamping device comprises a clamp body (1), a supporting positioning block (2) and a bow-shaped clamp (5); The clamp body (1) is provided with support bars on the left and right, the middle section of the left support bar is a clearance notch (X), and the top of the support bar is a support positioning reference plane (B); The support positioning block (2) is connected between the support bars arranged on the left and right sides, and a clearance notch (P) is provided at the bottom of the support positioning block (2), and the clearance notch (P) is adapted to the protruding portion of the corresponding part on the part (6); The top of the support bar of the clamp body (1) is provided with a T-shaped slot, and a nut (4) is placed in the T-shaped slot; two fixing holes (D1) are provided on the support positioning block (2); a screw (3) passes through the fixing hole (D1) and is screwed into the nut (4) to fix the support positioning block (2) between the support bars; The bow-shaped clamp (5) clamps the top and bottom of the support positioning block (2) and fits the surface (A) of the part (6) with the bottom clamping positioning surface (C) of the support positioning block (2). The bow-shaped clamp (5) is provided with a screw hole (D2), and the screw (3) passes through the screw hole (D2) to realize the clamping connection between the support positioning block (2) and the part (6); The positioning and clamping steps are as follows: Step 1: Clamp and align the clamp body (1) on the processing equipment; Step 2: a clearance notch P is provided at the bottom of the support positioning block (2) for rough positioning, and a feeler gauge is used to detect the gap between the surface (A) of the part (6) and the clamping positioning surface (C) at the bottom of the support positioning block (2) to ensure that the two planes are in effective contact and reliably positioned, and the screw (3) is passed through the screw hole (D2) to achieve a clamping connection between the support positioning block (2) and the part (6); Step 3: press-fit the part (6) connected to the two outer support and positioning blocks (2) onto the clamp body (1) through the T-slot using nuts (4) and screws (3); use a feeler gauge to detect the gap between the support and positioning reference plane (B) of the clamp body (1) and the bottom clamping and positioning surface (C) of the support and positioning block (2) to ensure that the two planes are in effective contact and reliably positioned; use processing equipment to process the surface (A) of the part (6) that is not blocked by the support and positioning block (2); Step 5: Use nuts (4) and screws (3) for T-slots to press-fit the two inner support and positioning blocks (2) onto the clamp body (1), and then disassemble the bow clamp (5) from the two outer support and positioning blocks (2) to the two inner support and positioning blocks (2) one by one to clamp the surface (A) of the part (6) that has been processed in step 3, and disassemble the two outer support and positioning blocks (2); Step 6: Use processing equipment to process the unprocessed portion of the surface (A) of the part (6).

2. The positioning method of the thin plate punching and welding part self-referenced positioning and clamping device according to claim 1, characterized in that: The center distance (L) of the T-slots at the left and right ends for connection with the support positioning block (2) is the same as the hole distance (L3) of the two fixing holes (D1) on the support positioning block (2).

3. The positioning method of the thin plate punching and welding part self-referenced positioning and clamping device according to claim 1, characterized in that: The middle opening distance (L5) of the arch clamp (5) is greater than the sum of the thickness (L4) of the support positioning block (2) and the thickness of the component (6).

4. The positioning method of the thin plate punching and welding part self-referenced positioning and clamping device as claimed in claim 3, characterized in that: The support bar height (L1) of the support bar is greater than the height (L7) of the part (6), and the inner distance (L2) between the two support bars is greater than the outer length (L6) of the part (6).

5. The positioning method of the self-referenced positioning clamping device for a thin plate punching and welding part according to claim 4, characterized in that: The supporting positioning reference plane (B) of the clamp body (1) and the bottom clamping positioning surface (C) of the supporting positioning block (2) are processed by grinding.

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