A welding fixture

Abstract

The utility model discloses a welding fixture, which belongs to the technical field of welding fixtures, and comprises a center mold, a positioning circular shaft is penetrated through the middle of the center mold in the thickness direction, clamping plates are movably clamped at the ends of both sides of the positioning circular shaft, and fixed blocks are fixedly installed on both sides of the center mold, first positioning shafts are movably penetrated at both sides of the fixed block on one side of the center mold, and second positioning shafts are penetrated at both sides of the fixed block on the other side of the center mold, and the first positioning shaft and the second positioning shaft are respectively abutted against the bottoms of both sides of the clamping plates; through the provided center mold and the clamping plate, a rib plate is placed between the center mold and the clamping plate, and the rib plate is self-checked, and a bad rib plate cannot be put in, and the circular hole on the rib plate is fixed by using the positioning shaft to control the angle and direction of the rib plate, so as to facilitate welding operation and improve the practicality of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of welding fixtures, in particular to a welding fixture. Background Art

[0002] The brake shoe is an important structure on the drum brake. It is installed in the brake drum. The brake effect is achieved by the friction between the brake pad and the brake drum through the expansion of the brake shoe. The brake shoe is generally made of a rib plate and an arc plate through welding.

[0003] The rib plate and curved plate of the brake shoe may be deformed during handling and transportation after production. Some deformations are difficult to determine with the naked eye. The existing welding fixture cannot perform self-inspection on defective parts. In addition, welding will also cause product deformation during the welding process, resulting in problems in the actual assembly of the finished product, affecting the braking effect of the brake. Therefore, a welding tooling fixture is proposed. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a welding fixture, which is convenient for clamping the parts of the brake shoe. The parts can be inspected during the clamping process, and defective products will be screened out, which is beneficial to improving the practicability of the device.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a welding tooling fixture, comprising a center mold, a positioning circular shaft passing through the middle of the center mold in the thickness direction, clamping plates are movably clamped at both end portions of the positioning circular shaft, and fixed blocks are fixedly installed on both sides of the center mold, a first positioning shaft is movably passed through both sides of the fixed block on one side of the center mold, and a second positioning shaft is passed through both sides of the fixed block on the other side of the center mold, and the first positioning shaft and the second positioning shaft are respectively abutted against the bottom of both sides of the clamping plate.

[0006] Preferably, a first fixing seat is fixedly installed on the top of the center mold close to the first positioning axis, and a second fixing seat is fixedly installed on the top of the center mold close to the second positioning axis. A square pin is movably connected to the middle of the top of the first fixing seat, and a round pin is movably connected to the middle of the top of the second fixing seat.

[0007] Preferably, a fixing screw is installed on the surface of the clamping plate located at the bottom of the positioning circular shaft, and the fixing screw passes through the clamping plate and is threadedly connected to the center mold.

[0008] Preferably, the clamping plate and the center mold are both semicircular, and their bottom surfaces are flush.

[0009] Preferably, the height of the clamping plate is smaller than the height of the center mold.

[0010] Preferably, a chamfer is provided on the top of the clamping plate on a side away from the center mold.

[0011] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0012] 1. Through the clamping plates set on both sides of the center mold, the position of the clamping plates is fixed by the positioning circular shaft, the rib plate is placed between the center mold and the clamping plate, and the rib plate is self-checked. Unqualified rib plates cannot be placed. The first positioning shaft and the second positioning shaft are used to fix the circular holes on the rib plate, and the angle and direction of the rib plate are controlled to facilitate welding operations, which is beneficial to improving the practicality of the device.

[0013] 2. The arc plate is placed by the first fixing seat and the second fixing seat arranged on the center mold, and the angle and direction of the arc plate are positioned by using square pins and round pins, so as to facilitate the control of the matching position of the rib plate and the arc plate, facilitate the welding operation, and further improve the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a welding fixture in the embodiment;

[0015] Figure 2 A schematic diagram of the overall structure of a welding fixture in the embodiment from another angle;

[0016] Figure 3 An exploded view of the overall structure of a welding fixture in the embodiment;

[0017] Among them: 1. Center mold; 2. Clamping plate; 3. First fixed seat; 4. Second fixed seat; 5. Positioning circular shaft; 6. Fixing screw; 7. Fixing block; 8. First positioning shaft; 9. Second positioning shaft; 10. Square pin; 11. Round pin. DETAILED DESCRIPTION

[0018] The following is attached to the instruction manual Figure 1-3 , the technical solution of the utility model is explained through specific embodiments.

[0019] Embodiment:

[0020] like Figure 1-3As shown, a welding fixture provided by the utility model comprises a center mold 1, a positioning circular shaft 5 is penetrated through the middle part of the center mold 1 in the thickness direction, and clamping plates 2 are movably connected to the ends of the positioning circular shaft 5 on both sides, and fixed blocks 7 are fixedly installed on both sides of the center mold 1. First positioning shafts 8 are movably penetrated on both sides of the fixed block 7 on one side of the center mold 1, and second positioning shafts 9 are penetrated on both sides of the fixed block 7 on the other side. The first positioning shaft 8 and the second positioning shaft 9 are respectively abutted against the bottom of both sides of the clamping plate 2, and a fixing screw 6 is installed on the surface of the clamping plate 2 at the bottom of the positioning circular shaft 5. The fixing screw 6 passes through the clamping plate 2 and is threadedly connected to the center mold 1, a first fixing seat 3 is fixedly installed on the top of the center mold 1 close to the first positioning shaft 8, and a second fixing seat 4 is fixedly installed on the top of the center mold 1 close to the second positioning shaft 9. A square pin 10 is movably connected to the middle of the top of the first fixing seat 3, and a round pin 11 is movably connected to the middle of the top of the second fixing seat 4.

[0021] The clamping plate 2 and the center mold 1 are both semicircular, and their bottom surfaces are flush, and the height of the clamping plate 2 is smaller than the height of the center mold 1.

[0022] A chamfer is provided on the top of the clamping plate 2 away from the center mold 1 .

[0023] Working steps: First, take the rib plate on the brake shoe, clamp the rib plate between the center mold 1 and the clamping plate 2, and overlap the bottom of the rib plate on the positioning circular shaft 5, so that the large circular hole side of the rib plate faces the second positioning shaft 9 side, and the small circular hole side faces the first positioning shaft 8 side, use the first positioning shaft 8 and the second positioning shaft 9 to pass through the circular holes on the rib plate, insert them into the fixing block 7, so that the circular holes on both sides of the rib plate are completely pressed against the surface of the center mold 1 to complete the fixation of the rib plate, take the arc plate on the brake shoe, place the arc plate on the top of the center mold 1, use square pins 10 and round pins 11 to pass through the holes on the arc plate to ensure that the arc plate is fixed on the top of the center mold 1, and the arc plate and the rib plate of the brake shoe can be welded from the height difference position of the center mold 1 and the clamping plate 2.

[0024] Working principle: clamp the clamping plate 2 on the positioning circular shaft 5, use the fixing screw 6 to fix the position of the center mold 1 and the clamping plate 2, the rib plate can be clamped between the center mold 1 and the clamping plate 2, and the surface flatness of the rib plate is self-checked. The rib plate with an insufficiently flat surface cannot be placed between the center mold 1 and the clamping plate 2. Use the first positioning shaft 8 and the second positioning shaft 9 to penetrate the fixing block 7 to fix the circular hole on the rib plate, control the angle of the rib plate between the center mold 1 and the clamping plate 2, place the arc plate on the center mold 1, and the square pin 10 and the round pin 11 are penetrated from the arc plate. On the center mold 1, the angle and position of the arc plate are fixed, and the surface curvature of the arc plate is self-checked. The arc plate with non-standard curvature is difficult to be fixed on the top of the center mold 1. The fixed arc plate is welded to the rib plate. The chamfer set on the clamping plate 2 is convenient for the welding rod to enter between the center mold 1 and the clamping plate 2 for welding operation. The welding angle is unified with the standard. After welding is completed, the force of removing the brake shoe from the fixture can be used to determine whether the brake shoe has been deformed during the welding process. The quality standard of the welded brake shoe can be unified to solve the problem of poor welding.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding fixture, comprising a center mold (1), characterized in that: A positioning circular shaft (5) is inserted through the middle of the center mold (1) in the thickness direction thereof, and the two end portions of the positioning circular shaft (5) are movably clamped with clamping plates (2), and fixed blocks (7) are fixedly installed on both sides of the center mold (1), and a first positioning shaft (8) is movably inserted through both sides of the fixed block (7) on one side of the center mold (1), and a second positioning shaft (9) is inserted through both sides of the fixed block (7) on the other side of the center mold (1), and the first positioning shaft (8) and the second positioning shaft (9) are respectively abutted against the bottom of both sides of the clamping plate (2).

2. A welding fixture according to claim 1, characterized in that: A first fixing seat (3) is fixedly installed on the top of the center mold (1) on the side close to the first positioning axis (8), and a second fixing seat (4) is fixedly installed on the top of the center mold (1) on the side close to the second positioning axis (9). A square pin (10) is movably connected to the middle of the top of the first fixing seat (3), and a round pin (11) is movably connected to the middle of the top of the second fixing seat (4).

3. A welding fixture according to claim 1, characterized in that: A fixing screw (6) is installed on the surface of the clamping plate (2) at the bottom of the positioning circular shaft (5), and the fixing screw (6) passes through the clamping plate (2) and is threadedly connected to the center mold (1).

4. A welding fixture according to claim 1, characterized in that: The clamping plate (2) and the center mold (1) are both semicircular, and their bottom surfaces are flush.

5. A welding fixture according to claim 4, characterized in that: The height of the clamping plate (2) is smaller than the height of the central mold (1).

6. A welding fixture according to claim 1, characterized in that: A chamfer is provided on the top of the clamping plate (2) on the side away from the central mold (1).

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