A fixture for machining thin-walled parts

Abstract

The utility model discloses a kind of clamps for thin-walled part machining, including the bottom plate of " ] " type, two pressure strips and several pressing blocks;The opposite side upper portion of two pressure strips is provided with first inclined surface;The two sides of pressing block are provided with the second inclined surface matched with the first inclined surface of pressure strip;Several pressing blocks are connected with the upper end surface of bottom plate by fastening screw.The utility model has the advantages that four degrees of freedom directions can be clamped simultaneously, deformation is not easy to produce when workpiece is processed, processing precision is high, and qualified rate is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a fixture for machining thin-walled parts. Background Technology

[0002] The core function of a fixture is positioning and clamping. Only with proper positioning and clamping can machining errors be eliminated and manufacturing accuracy improved during processing. Slender, thin-walled parts in the shape of vertical angle irons are characterized by their long length and thin wall thickness, requiring high flatness and perpendicularity. Controlling machining deformation is a major challenge when machining these parts. Designing the positioning and clamping force points of the fixture is a core part of controlling machining deformation. Traditional fixtures use two different limiting components for each of the four degrees of freedom (up / down and left / right), which easily leads to problems such as inadequate control of the degrees of freedom or machining deformation, resulting in a low yield rate. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a fixture for machining thin-walled parts, which can clamp in four degrees of freedom at the same time, and the workpiece is not easily deformed during machining.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is a fixture for processing thin-walled parts, including a base plate in the shape of "]", two pressure strips and several pressure blocks; a first inclined surface is provided on the upper part of the opposite side of the two pressure strips; a second inclined surface matching the first inclined surface of the pressure strip is provided on both sides of the pressure blocks; the several pressure blocks are connected to the upper end face of the base plate by fastening screws.

[0005] Furthermore, the number of pressure blocks is two.

[0006] Furthermore, a first positioning plate is installed at both ends of the base plate.

[0007] Furthermore, a second positioning plate is installed at both ends of the base plate; a positioning bolt is threaded onto the second positioning plate; and a clearance groove is provided on the base plate to avoid the positioning bolt.

[0008] Furthermore, a spring is provided around the fastening screw; the upper end of the spring abuts against the lower end face of the pressure block, and the lower end abuts against the upper end face of the base plate.

[0009] Furthermore, the angle between the first inclined plane and the second inclined plane is 45°.

[0010] Furthermore, a washer is installed between the second positioning plate and the base plate.

[0011] Furthermore, the second positioning plate has an arc-shaped groove for connecting the base plate.

[0012] Furthermore, the pressure bar is provided with several clearance holes for processing workpieces.

[0013] The beneficial effects of this utility model are: During operation, two workpieces to be processed are placed between the upper sides of the base plate and the pressure bar, and the fastening screws are tightened. The pressure block moves downward, and the second inclined surface of the pressure block presses against the first inclined surface of the pressure bar, so that the pressure bar receives compressive force in both the horizontal and vertical directions. This, in conjunction with the pressure plate, simultaneously clamps the workpieces in both the vertical and horizontal (left-right) directions. This invention has a simple structure, can clamp in four degrees of freedom simultaneously, is less prone to workpiece deformation during processing, has high processing accuracy, and significantly improves the pass rate. Attached Figure Description

[0014] Figure 1 This is a perspective view of the overall structure of the embodiment; Figure 2 for Figure 1 Top view; Figure 3 for Figure 1 The left view; Figure 4 This is a front view of the second positioning plate in the embodiment.

[0015] In the diagram, 1-base plate, 2-pressure strip, 3-pressure block, 4-fastening screw, 5-first positioning plate, 6-second positioning plate, 7-positioning bolt, 8-clearance groove, 9-spring, 10-clearance hole, 11-arc groove, 12-washer ring, 13-screw. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0017] Example A fixture for machining thin-walled parts, such as Figure 1-4 As shown, it includes a base plate 1 in the shape of "]", two pressure strips 2 and several pressure blocks 3; a first inclined surface is provided on the upper part of the opposite side of the two pressure strips 2; a second inclined surface matching the first inclined surface of the pressure strip 2 is provided on both sides of the pressure blocks 3; several pressure blocks 3 are connected to the upper end face of the base plate 1 by fastening screws 4.

[0018] During operation, two workpieces to be processed are placed between the upper surfaces of the base plate 1 and the pressure strip 2. The fastening screws 4 are tightened, and the pressure block 2 moves downwards. The second inclined surface of the pressure block 2 presses against the first inclined surface of the pressure strip, causing the pressure strip 2 to receive pressure in both the horizontal and vertical directions. This, combined with the pressure plate 3, simultaneously clamps the workpieces in both the vertical and horizontal directions. This invention has a simple structure, can clamp in four degrees of freedom simultaneously, and prevents workpiece deformation during processing, resulting in high processing accuracy and significantly improved yield.

[0019] Specifically, there are two pressure blocks 3. The number of pressure blocks 3 can be increased or decreased depending on the length of the workpiece.

[0020] Specifically, the base plate 1 has first positioning plates 5 installed at both ends. One end of the workpiece to be processed contacts one side of the first positioning plate 5, thereby positioning the workpiece.

[0021] Specifically, a second positioning plate 6 is installed at both ends of the base plate 1; a positioning bolt 7 is threaded onto the second positioning plate 6; and a clearance groove 8 is provided on the base plate 1 to avoid the positioning bolt 7. The positioning bolt 7 is rotated until it contacts the other end of the workpiece to be processed, thereby further positioning the workpiece.

[0022] Specifically, to facilitate workpiece disassembly, a spring 9 is fitted around the fastening screw 4; the upper end of the spring 9 abuts against the lower end face of the pressure block 3, and the lower end abuts against the upper end face of the base plate 1. After processing is completed, the fastening screw 4 is loosened, and the pressure block 3 automatically rises a certain distance under the action of the spring 9, thereby relieving the pressure on the pressure bars 4 on both sides, making it easy to quickly remove the workpiece from under the pressure bars 4.

[0023] Specifically, the angle between the first and second inclined planes is 45°.

[0024] Specifically, in order to better accommodate workpieces of different lengths, a washer 12 is installed between the second positioning plate 6 and the base plate 1, and a screw 13 is threaded through the washer 12 and then threaded onto the base plate 1.

[0025] Specifically, to facilitate disassembly of the workpiece, the second positioning plate 6 has an arc-shaped groove 11 for connecting to the base plate 1. After processing is completed, loosen 13 and tighten the positioning bolt 7 outward. Under its own weight, the end of the second positioning plate 6 with the positioning bolt 7 installed rotates downward, making it easy to remove the workpiece.

[0026] In this embodiment, the machining process involves drilling a hole on one side of the workpiece. Therefore, the pressure strip 2 has several clearance holes 10 for machining the workpiece, and clearance grooves are also provided at corresponding positions on the base 1. Milling is also required on the upper edge of the other side of the workpiece; therefore, stepped bosses are provided on both sides of the upper surface of the base plate 1 in this embodiment. Depending on the machining location and process type, corresponding clearance measures can be provided at corresponding positions on the base 1 and pressure strip 2 to avoid interfering with the machining tool operation.

[0027] The working principle of this utility model: During operation, two workpieces to be processed are placed between the upper surfaces of the base plate 1 and the pressure strip 2. The fastening screws 4 are tightened, and the pressure block 2 moves downwards. The second inclined surface of the pressure block 2 presses against the first inclined surface of the pressure strip, causing the pressure strip 2 to receive pressure in both the horizontal and vertical directions. This, combined with the pressure plate 3, simultaneously clamps the workpieces in both the vertical and horizontal directions. This invention has a simple structure, can clamp in four degrees of freedom simultaneously, and prevents workpiece deformation during processing, resulting in high processing accuracy and significantly improved yield.

[0028] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A jig for machining a thin-walled part, characterized by: It includes a base plate (1) in the shape of "]", two pressure strips (2) and several pressure blocks (3); a first inclined surface is provided on the upper part of the opposite side of the two pressure strips (2); a second inclined surface matching the first inclined surface of the pressure strips (2) is provided on both sides of the pressure blocks (3); several pressure blocks (3) are connected to the upper end face of the base plate (1) by fastening screws (4).

2. The jig for machining a thin-walled part according to claim 1, characterized by: The number of the pressing blocks (3) is two.

3. The thin-walled part machining clamp according to claim 1, characterized in that: The base plate (1) is equipped with first positioning plates (5) at both ends.

4. The jig for machining a thin-walled part according to claim 3, characterized in that: The base plate (1) is also equipped with a second positioning plate (6) at both ends; a positioning bolt (7) is threaded on the second positioning plate (6); and a clearance groove (8) is provided on the base plate (1) to avoid the positioning bolt (7).

5. The thin-walled part machining clamp according to claim 1, characterized in that: The fastening screw (4) is fitted with a spring (9); the upper end of the spring (9) abuts against the lower end face of the pressure block (3), and the lower end abuts against the upper end face of the base plate (1).

6. The thin-walled part machining clamp according to claim 1, characterized in that: The angle between the first inclined plane and the second inclined plane is 45°.

7. The thin-walled part machining clamp according to claim 4, characterized in that: A washer (12) is installed between the second positioning plate (6) and the base plate (1).

8. The thin-walled part machining clamp according to claim 4, characterized in that: The second positioning plate (6) has an arc-shaped groove (11) for connecting the base plate (1).

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