Auxiliary welding tool for part welding

Abstract

The utility model discloses an auxiliary welding tool for part welding, and relates to the technical field of auxiliary welding tool structures, a strip-shaped sinking groove is formed in the top surface of a base in the length direction of the base, and a plurality of rectangular grooves are formed in the groove bottom of the strip-shaped sinking groove in the length direction of the base; a through hole penetrating through the bottom surface of the base is formed in the groove bottom of each rectangular groove, a plurality of air inlet holes corresponding to the rectangular grooves are formed in the front end face of the base in the length direction of the base, and the air inlet holes communicate with the rectangular grooves; the auxiliary welding tool further comprises a strip-shaped plate, a plurality of conical bosses are fixedly arranged on the bottom surface of the strip-shaped plate in the length direction of the strip-shaped plate and correspond to the rectangular grooves respectively, and a conical hole penetrating through the top surface of the strip-shaped plate is formed in each conical boss. The nitrogen protection device has the advantages that a nitrogen protection layer can be formed, and the welding quality of two parts is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary welding fixture structures, and in particular to an auxiliary welding fixture for welding parts. Background Technology

[0002] Auxiliary welding fixtures are used in conjunction with laser welding machines to weld two parts together. The structure of an auxiliary welding fixture used in a certain workshop is as follows: Figures 1-3 As shown, it includes a base 1, with multiple blind grooves 2 formed along its length inside the base 1. Each blind groove 2 has a through hole 3 that penetrates downward through the bottom surface of the base 1. Multiple air inlets 4, which are respectively corresponding to the blind grooves 2, are formed on the front end face of the base 1. The air inlets 4 are connected to the blind grooves 2. Pads 5, which are supported on the workbench, are fixed on the bottom surface of the base 1 and at its four corners.

[0003] The method by which workers use this auxiliary welding fixture in conjunction with a laser welding machine to weld two parts together is as follows:

[0004] S1. Connect the connector on the nitrogen storage tank to the air inlet 4;

[0005] S2. Stack the two parts 6 together, with the upper part 6 resting against the bottom surface of the base 1, as shown. Figure 4 As shown, and ensure that the upper part 6 blocks the through hole 3;

[0006] S3. Open the nitrogen storage tank. Under pressure, the nitrogen in the nitrogen storage tank flows through the connector, the air inlet 4, and the blind groove 2 in sequence, and finally flows to the outside from the top port of the blind groove 2. The nitrogen that enters the blind groove 2 also enters the through hole 3 to cover the top surface of the upper part 6.

[0007] S4. The worker operates the laser welding machine, positioning the welding head towards the blind groove 2. The laser welding machine is turned on, and the welding head generates a laser beam downwards. The laser beam passes through the blind groove 2 and the through hole 3, finally irradiating the top surface of the upper part 6. The direction of the laser beam is as follows: Figure 4 As indicated by the hollow arrow, the upper part 6 is welded onto the lower part 6, thus ultimately achieving the welding of the two parts 6 together; after welding, the worker turns off the laser welding machine and then removes the two parts 6.

[0008] S5. Workers can weld the two parts 6 together by repeating steps S2 to S4 multiple times.

[0009] However, while this auxiliary welding fixture can work in conjunction with laser welding to weld two parts together, it still has the following technical shortcomings:

[0010] In step S3, since the top port of the blind groove 2 is open, the nitrogen gas that has entered the blind groove 2 flows out rapidly from the top port of the blind groove 2. This results in the nitrogen gas not completely covering the top surface of the upper part 6. In other words, air is mixed into the top surface of the upper part 6, which affects the welding of the two parts 6 by the laser beam and reduces the welding quality of the two parts 6.

[0011] Therefore, there is an urgent need for an auxiliary welding fixture that can form a nitrogen protective layer and greatly improve the welding quality of the two parts. Utility Model Content

[0012] The purpose of this invention is to overcome the shortcomings of the prior art and provide an auxiliary welding fixture for welding parts that can form a nitrogen protective layer and greatly improve the welding quality of two parts.

[0013] The purpose of this utility model is achieved through the following technical solution: an auxiliary welding fixture for welding parts, which includes a base, a strip-shaped groove arranged along its length on the top surface of the base, a plurality of rectangular grooves arranged along its length on the bottom of the strip-shaped groove, a through hole penetrating the bottom surface of the base on the bottom of each rectangular groove, and a plurality of air inlets corresponding to the rectangular grooves arranged along its length on the front surface of the base, the air inlets being connected to the rectangular grooves.

[0014] The auxiliary welding fixture also includes a strip plate. Multiple conical bosses are fixed on the bottom surface of the strip plate along its length. Each conical boss corresponds to a rectangular groove. Each conical boss has a conical hole that penetrates the top surface of the strip plate. The strip plate is embedded in the strip groove, and the conical bosses on the strip plate extend into the rectangular groove. The conical holes in the conical bosses are located directly above the through holes, and an annular cavity is formed between the outer wall of the conical boss and the inner wall of the rectangular groove.

[0015] Pads are fixed on the bottom surface of the base and at its four corners.

[0016] The bottom of the strip-shaped sinkhole has two rectangular grooves.

[0017] The outer contour of the strip plate matches the strip groove, and two conical bosses are fixed on the bottom surface of the strip plate.

[0018] The bottom of the rectangular groove is provided with multiple threaded holes, and the strip plate is provided with multiple light holes corresponding to the threaded holes. The strip plate is fixed in the strip groove by locking screws passing through the light holes and threadedly connected to the threaded holes.

[0019] This utility model has the following advantages:

[0020] The strip plate is embedded in the strip groove, and the conical boss on the strip plate extends into the rectangular groove. The conical hole in the conical boss is located directly above the through hole, and an annular cavity is formed between the outer wall of the conical boss and the inner wall of the rectangular groove. Because an annular cavity is formed between the outer wall of the conical boss and the inner wall of the rectangular groove, the flow rate of nitrogen gas entering it is slowed down, thereby forming a nitrogen protective layer in the annular cavity. Since there is always a nitrogen protective layer on the top surface of the upper part, no air will mix into the top surface of the upper part, thus not affecting the welding of the two parts by the laser beam, thereby greatly improving the welding quality of the two parts. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an existing auxiliary welding fixture;

[0022] Figure 2 for Figure 1 Top view;

[0023] Figure 3 for Figure 1 AA section view;

[0024] Figure 4 This is a schematic diagram showing the upper part being pressed against the bottom surface of the base of the auxiliary welding fixture.

[0025] Figure 5 This is a schematic diagram of the structure of this utility model;

[0026] Figure 6 for Figure 5 Top view;

[0027] Figure 7 for Figure 5 BB cross-sectional view;

[0028] Figure 8 This is a schematic diagram of the structure of the base of this utility model;

[0029] Figure 9 for Figure 8 Top view;

[0030] Figure 10 This is a schematic diagram of the strip plate structure;

[0031] Figure 11 for Figure 10 Main section diagram;

[0032] Figure 12 This is a schematic diagram showing the upper part resting against the bottom surface of the base;

[0033] Figure 13 This is a physical image of the present invention;

[0034] In the picture:

[0035] 1-Base, 2-Blind groove, 3-Through hole, 4-Air inlet, 5-Padded block, 6-Part;

[0036] 7-Strip groove, 8-Rectangular groove, 9-Strip plate, 10-Conical boss, 11-Conical hole, 12-Threaded hole, 13-Smooth hole, 14-Locking screw. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0038] like Figures 5-11 As shown, an auxiliary welding fixture for welding parts includes a base 1. Pads 5 are fixed on the bottom surface of the base 1 and at its four corners. A strip-shaped groove 7 is formed on the top surface of the base 1 along its length. Multiple rectangular grooves 8 are formed on the bottom of the strip-shaped groove 7 along its length. Two rectangular grooves 8 are formed on the bottom of the strip-shaped groove 7. A through hole 3 penetrating the bottom surface of the base 1 is formed on the bottom of each rectangular groove 8. Multiple air inlets 4 are formed on the front end face of the base 1 along its length, which are respectively corresponding to the rectangular grooves 8. The air inlets 4 are connected to the rectangular grooves 8.

[0039] The auxiliary welding fixture also includes a strip plate 9. The outer contour of the strip plate 9 matches the strip groove 7. Multiple conical bosses 10 are fixed on the bottom surface of the strip plate 9 along its length. Two conical bosses 10 are fixed on the bottom surface of the strip plate 9. The multiple conical bosses 10 correspond to each rectangular groove 8. Each conical boss 10 has a conical hole 11 that penetrates the top surface of the strip plate 9. The strip plate 9 is embedded in the strip groove 7, and the conical bosses 10 on the strip plate 9 extend into the rectangular groove 8. The conical holes 11 in the conical bosses 10 are located directly above the through holes 3, and an annular cavity is formed between the outer wall of the conical bosses 10 and the inner wall of the rectangular groove 8.

[0040] The bottom of the rectangular groove 8 is provided with multiple threaded holes 12, and the strip plate 9 is provided with multiple light holes 13 corresponding to the threaded holes 12. The strip plate 9 is fixed in the strip groove 7 by a locking screw 14 passing through the light holes 13 and threadedly connected to the threaded holes 12.

[0041] The working process of this utility model is as follows:

[0042] S1. Connect the connector on the nitrogen storage tank to the air inlet 4;

[0043] S2. Stack the two parts 6 together, with the upper part 6 resting against the bottom surface of the base 1, ensuring that the upper part 6 covers the through hole 3. Figure 12 As shown;

[0044] S3. Open the nitrogen storage tank. Under pressure, the nitrogen in the nitrogen storage tank flows sequentially through the connector, air inlet 4, and annular cavity, and finally through the conical hole 11 to the outside. The nitrogen that enters the annular cavity also enters the through hole 3 to cover the top surface of the upper part 6.

[0045] S4. The worker operates the laser welding machine, aligning the welding head with the tapered hole 11. The laser welding machine is turned on, and the welding head generates a laser beam downwards. The laser beam passes through the tapered hole 11, the annular cavity, and the through hole 3, finally irradiating the top surface of the upper part 6. The direction of the laser beam is as follows: Figure 12 As indicated by the hollow arrow, the upper part 6 is welded onto the lower part 6, thus ultimately achieving the welding of the two parts 6 together; after welding, the worker turns off the laser welding machine and then removes the two parts 6.

[0046] S5. Workers can weld the two parts 6 together by repeating steps S2 to S4 multiple times.

[0047] As can be seen from step S4, since an annular cavity is formed between the outer wall of the conical boss 10 and the inner wall of the rectangular groove 8, the flow rate of nitrogen gas entering the annular cavity is slowed down, thereby forming a nitrogen protective layer within the annular cavity. Because a nitrogen protective layer is always present on the top surface of the upper part 6, no air will mix into the top surface of the upper part 6. Therefore, this auxiliary welding fixture, compared to... Figures 1-4 The auxiliary welding fixture shown will not affect the welding of the two parts 6 by the laser beam, thereby greatly improving the welding quality of the two parts 6.

[0048] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An auxiliary welding fixture for welding parts, characterized in that: It includes a base (1), a strip groove (7) is provided on the top surface of the base (1) along its length direction, a plurality of rectangular grooves (8) are provided on the bottom of the strip groove (7) along its length direction, a through hole (3) is provided on the bottom of each rectangular groove (8) through the bottom surface of the base (1), and a plurality of air inlets (4) are provided on the front end face of the base (1) along its length direction, which are respectively corresponding to the rectangular grooves (8), and the air inlets (4) are connected to the rectangular grooves (8). The auxiliary welding fixture also includes a strip plate (9). Multiple conical bosses (10) are fixed on the bottom surface of the strip plate (9) along its length. The multiple conical bosses (10) correspond to each rectangular groove (8). Each conical boss (10) has a conical hole (11) that penetrates the top surface of the strip plate (9). The strip plate (9) is embedded in the strip groove (7), and the conical bosses (10) on the strip plate (9) extend into the rectangular groove (8). The conical hole (11) in the conical boss (10) is located directly above the through hole (3), and an annular cavity is formed between the outer wall of the conical boss (10) and the inner wall of the rectangular groove (8).

2. The auxiliary welding fixture for welding parts according to claim 1, characterized in that: Pads (5) are fixed on the bottom surface of the base (1) and at its four corners.

3. The auxiliary welding fixture for welding parts according to claim 1, characterized in that: The bottom of the strip-shaped sinkhole (7) has two rectangular slots (8).

4. The auxiliary welding fixture for welding parts according to claim 1, characterized in that: The outer contour of the strip plate (9) matches the strip groove (7), and two conical bosses (10) are fixed on the bottom surface of the strip plate (9).

5. The auxiliary welding fixture for welding parts according to claim 1, characterized in that: The bottom of the rectangular groove (8) is provided with multiple threaded holes (12), and the strip plate (9) is provided with multiple light holes (13) corresponding to the threaded holes (12). The strip plate (9) is fixed in the strip groove (7) by passing through the light holes (13) with locking screws (14) and being threadedly connected to the threaded holes (12).

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