Multi-point clamp for vacuum brazing of box body

Abstract

The utility model discloses a multi-point clamp for vacuum brazing of a box body, which comprises a bottom plate, and an adjusting cavity is arranged at the top end of the bottom plate. The first adjusting lead screw is rotated to drive the driven block to move, so that the driven rack connected with the driven block moves along with the first adjusting lead screw, the other driven rack is driven to move together under the action of the driven gear in the moving process of the driven rack, and the two moving seats are unfolded; after the inner wall of the case is attached to a positioning plate, a worker rotates two second adjusting lead screws in sequence, so that an L-shaped clamping plate and the positioning plate get close to each other, the case is clamped and fixed, after fixing is completed, a plurality of bolts are rotated in sequence to drive a rubber pad to press and fix the top end of the case, and the clamping and fixing effect on a case body of the case is completed; and the device can be applied to cases of different sizes, the structure is simple, the clamping force is improved, and the practicability and the welding quality of the device are improved.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, specifically a multi-point fixture for vacuum brazing of box bodies. Background Technology

[0002] Vacuum brazing of enclosures is a brazing technique performed in a vacuum environment. It is widely used in industrial fields that require high strength, high precision, and oxidation-free connections. The principle is to heat the brazing filler metal in a vacuum furnace to a temperature above its melting point but below that of the base material, causing the filler metal to melt and flow, thereby filling the gaps in the enclosure joints and melting and diffusing with the base material to achieve the purpose of connection. Currently, most enclosures are connected and fixed by vacuum brazing.

[0003] Most current clamping fixtures use an arc-shaped clamping clamp, which can easily lead to insufficient clamping force, resulting in significant welding deformation of the chassis after welding. This increases the difficulty of subsequent processing. Furthermore, most arc-shaped clamping clamps have fixed dimensions, making them unsuitable for chassis of different sizes and thus impractical. Utility Model Content

[0004] The purpose of this invention is to provide a multi-point fixture for vacuum brazing of housings, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-point clamp for vacuum brazing of a box, comprising a base plate, an adjustment cavity at the top of the base plate, a driven gear rotatably connected to the bottom surface of the adjustment cavity at its center, two driven racks meshing on the outer surface of the driven gear, a driven block fixedly connected to one side of one of the driven racks, a first adjusting screw rotatably connected to the two inner side walls of the adjustment cavity, the outer surface of the first adjusting screw threadedly connected to the inside of the driven block, movable seats fixedly connected to the tops of the two driven racks near their edges, an adjustment groove at the top of each of the two movable seats, a second adjusting screw threadedly connected to the inside of each of the two adjustment grooves, an L-shaped clamping plate threadedly connected to the outer surface of each of the two second adjusting screws, and a positioning plate fixedly connected to the top of the movable seat near its inner side.

[0006] As a further preferred embodiment of this technical solution, the top of the L-shaped clamping plate is threaded with multiple bolts, and the bottom of each of the multiple bolts is rotatably connected with a rubber pad.

[0007] As a further preferred embodiment of this technical solution, a perforated sealing plate is fixedly connected inside the adjustment cavity, and the connection points between the two movable seats and the driven rack are slidably connected inside the perforated sealing plate.

[0008] As a further preferred embodiment of this technical solution, the top of the movable seat has two positioning grooves, and the bottom of the L-shaped clamping plate is fixedly connected to two positioning blocks, with the outer surfaces of the two positioning blocks respectively slidingly connected to the inside of the two positioning grooves.

[0009] As a further preferred embodiment of this technical solution, one end of the first adjusting screw passes through the inner side wall of the adjusting cavity and is fixedly connected to a limiting post. A movable sleeve is slidably connected to the outer surface of the limiting post. A fixed seat is fixedly connected to one side of the base plate at the position of the first adjusting screw, and one end of the movable sleeve is inserted into the fixed seat.

[0010] As a further preferred embodiment of this technical solution, one end of the limiting post is fixedly connected to a limiting plate, and one end of the movable sleeve is interference-fitted with the interior of the fixed seat.

[0011] This utility model provides a multi-point clamp for vacuum brazing of box bodies, which has the following beneficial effects:

[0012] This invention uses the rotation of the first adjusting screw to move the driven block, causing the driven rack connected to the driven block to move as well. During the movement of the driven rack, the driven gear drives another driven rack to move together, causing the two moving seats to unfold. After the inner wall of the chassis is in contact with the positioning plate, the operator rotates the two second adjusting screws in sequence, causing the L-shaped clamping plate to move closer to the positioning plate and clamp and fix the chassis. After fixing, multiple bolts are rotated in sequence to press and fix the top of the chassis with rubber pads, thus achieving the clamping and fixing effect of the chassis body. It can be applied to chassis of different sizes, has a simple structure, increases clamping force, and improves the practicality of the device and welding quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 This is an exploded view of the overall structure of this utility model;

[0015] Figure 3 This is an exploded view of the structure between the movable seat and the adjusting screw of this utility model;

[0016] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure of region A in the middle.

[0017] In the diagram: 1. Base plate; 2. Adjustment cavity; 3. Driven rack; 4. Driven gear; 5. Hollowed-out sealing plate; 6. Driven block; 7. No. 1 adjusting screw; 8. Moving seat; 9. Positioning plate; 10. Adjustment groove; 11. No. 2 adjusting screw; 12. L-shaped clamping plate; 13. Bolt; 14. Rubber pad; 15. Limiting post; 16. Movable sleeve; 17. Fixed seat; 18. Limiting plate; 19. Positioning groove; 20. Positioning block. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] This utility model provides a technical solution: such as Figure 1-4 As shown, in this embodiment, a multi-point fixture for vacuum brazing of a box includes a base plate 1. An adjustment cavity 2 is formed at the top of the base plate 1. A driven gear 4 is rotatably connected to the bottom surface of the adjustment cavity 2 at its center. Two driven racks 3 mesh with the outer surface of the driven gear 4. A driven block 6 is fixedly connected to one side of one of the driven racks 3. A first adjusting screw 7 is rotatably connected to the two inner side walls of the adjustment cavity 2. The outer surface of the first adjusting screw 7 is threaded into the driven block 6. Moving seats 8 are fixedly connected to the tops of the two driven racks 3 near their edges. Each of the two adjustment slots 10 is provided at the top of the seat 8. The two adjustment slots 10 are threaded with a second adjustment screw 11. The outer surfaces of the two second adjustment screws 11 are threaded with an L-shaped clamping plate 12. A positioning plate 9 is fixedly connected at the top of the movable seat 8 near the inner side. The adjustment cavity 2 can be used to store the driven gear 4 and the driven rack 3. A slot can also be opened on the bottom surface of the adjustment cavity 2 to position the driven rack 3 and further improve stability. The driven gear 4 can be used to make the two driven racks 3 move simultaneously.

[0020] like Figure 3 and Figure 4 As shown, the top of the L-shaped clamping plate 12 is threaded with multiple bolts 13, and the bottom of each bolt 13 is rotatably connected to a rubber pad 14. By setting the bolts 13, the position of the rubber pad 14 can be adjusted so that the top of the chassis can be pressed tightly. The rubber pad 14 is made of high temperature resistant material.

[0021] like Figure 4 As shown, a perforated sealing plate 5 is fixedly connected inside the adjustment cavity 2. The connection between the two movable seats 8 and the driven rack 3 is slidably connected inside the perforated sealing plate 5. By setting the perforated sealing plate 5, the adjustment cavity 2 can be sealed and the movable seats 8 can be positioned and guided to prevent them from tilting during movement. This indirectly makes it less likely for the driven rack 3 connected to the movable seats 8 to tilt.

[0022] like Figure 2 and Figure 3 As shown, the top of the movable seat 8 has two positioning grooves 19, and the bottom of the L-shaped clamping plate 12 is fixedly connected to two positioning blocks 20. The outer surfaces of the two positioning blocks 20 are slidably connected to the inside of the two positioning grooves 19, which can position the L-shaped clamping plate 12, prevent skewing, and improve the clamping force.

[0023] like Figure 2 , Figure 3 and Figure 4 As shown, one end of the first adjusting screw 7 passes through the inner side wall of the adjusting cavity 2 and is fixedly connected to a limiting post 15. A movable sleeve 16 is slidably connected to the outer surface of the limiting post 15. A fixed seat 17 is fixedly connected to one side of the base plate 1 at the position of the first adjusting screw 7. One end of the movable sleeve 16 is inserted into the fixed seat 17. By setting the limiting post 15, the first adjusting screw 7 can be controlled by cooperating with the movable sleeve 16, which facilitates adjustment. By setting the fixed seat 17, the first adjusting screw 7 can be fixed by cooperating with the movable sleeve 16, which improves the stability of the moving seat 8 after adjustment.

[0024] like Figure 2 and Figure 3 As shown, a limiting plate 18 is fixedly connected to one end of the limiting post 15, and one end of the movable sleeve 16 is interference-fitted with the inside of the fixed base 17. By setting the limiting plate 18, the movable sleeve 16 can be prevented from falling off. By interfering with the inside of the fixed base 17, the connection strength can be improved.

[0025] This utility model provides a multi-point fixture for vacuum brazing of box bodies, and its specific working principle is as follows:

[0026] The operator pulls the movable sleeve 16 out of the fixed seat 17, rotates the movable sleeve 16 to drive the first adjusting screw 7 connected to the limiting post 15 to rotate. After the movable seat 8 reaches the appropriate position, the chassis to be brazed is placed into the gap between the positioning plate 9 and the L-shaped clamping plate 12, and the first adjusting screw 7 is rotated to make the positioning plate 9 fit tightly against the inner wall of the chassis. At this time, the movable sleeve 16 is slid along the surface of the limiting post 15 and inserted into the fixed seat 17. Then, the two second adjusting screws 11 are rotated in sequence to drive the L-shaped clamping plate 12 to press and fix it against the outer surface of the chassis. Then, the bolts 13 are rotated in sequence to drive the rubber pads 14 to press and fix the top of the chassis at multiple points. After the fixation is completed, the operator lifts the base plate 1 and sends the device together with the chassis into the vacuum furnace for vacuum heating. After reaching the specified temperature, the brazing filler metal in the gap at the connection point melts and connects the various parts of the chassis together, completing the vacuum brazing.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-point fixture for vacuum brazing of a box, comprising a base plate (1), characterized in that: The bottom plate (1) top end is provided with adjusting cavity (2), the inside bottom surface of adjusting cavity (2) and located central position is rotatably connected with driven gear (4), the outer surface of driven gear (4) is engaged with two driven racks (3), one of the driven racks (3) one side is fixedly connected with driven block (6), the inside two side walls of adjusting cavity (2) are rotatably connected with No. Adjusting screw (7), the outer surface of No. Adjusting screw (7) is threadedly connected with the inside of driven block (6), two driven racks (3) top end and near edge position is fixedly connected with moving seat (8), two adjusting grooves (10) are formed in the top of two moving seats (8), two adjusting grooves (10) are threadedly connected with No. Two adjusting screws (11) are connected with the outer surface of two adjusting screws (11), and the L-shaped clamping plate (12) is threadedly connected with the outer surface of two adjusting screws (11), the moving seat (8) top end and near the inside position is fixedly connected with the positioning plate (9).

2. The multi-point fixture for vacuum brazing of a box according to claim 1, characterized in that: The L-shaped clamping plate (12) top end is threadedly connected with a plurality of bolts (13), and the bottom end of the plurality of bolts (13) is rotatably connected with a rubber pad (14).

3. The multi-point fixture for vacuum brazing of a box according to claim 2, characterized in that: The adjusting cavity (2) is fixedly connected with the hollow sealing plate (5), and the connecting portions of the two moving seats (8) and the driven racks (3) and the hollow sealing plate (5) are slidably connected.

4. The multi-point fixture for vacuum brazing of a box according to claim 3, characterized in that: The moving seat (8) top end is provided with two positioning grooves (19), and the bottom end of the L-shaped clamping plate (12) is fixedly connected with two positioning blocks (20), and the outer surfaces of the two positioning blocks (20) are slidably connected with the two positioning grooves (19) respectively.

5. The multi-point fixture for vacuum brazing of a box according to claim 1, characterized in that: One end of the No. Adjusting screw (7) penetrates the inside one side wall of the adjusting cavity (2) and is fixedly connected with the limiting column (15), the outer surface of the limiting column (15) is slidably connected with the movable sleeve (16), one side of the bottom plate (1) and located No. Adjusting screw (7) position is fixedly connected with the fixed seat (17), and one end of the movable sleeve (16) is inserted into the inside of the fixed seat (17).

6. The multi-point fixture for vacuum brazing of a box according to claim 5, characterized in that: One end of the limiting column (15) is fixedly connected with the limiting plate (18), and one end of the movable sleeve (16) is interference fit with the inside of the fixed seat (17).

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