Mould for preventing spoke mounting surface from sparking during welding

Abstract

The utility model relates to the technical field of welding moulds, in particular to a mould for preventing a spoke mounting surface from sparking during welding, which comprises a base, convex columns, a central positioning block and an adjusting arm, the convex columns are arranged in an array along the circumferential direction, and the upper surfaces of the convex columns protrude out of the upper surface of the base. The center positioning block is connected to the center of a circumferential array of the protruding column, one end of the adjusting arm is detachably connected to the center of the center positioning block, the other end of the adjusting arm extends to the protruding column, and a leveling instrument is arranged on the adjusting arm. The mould for preventing the spoke mounting surface from sparking during welding disclosed by the utility model can ensure the welding quality of a product.

Description

Technical Field

[0001] The utility model relates to the technical field of welding jigs, in particular to a jig for preventing sparks from occurring on a spoke mounting surface during welding. Background Art

[0002] A welding jig is essentially a positioning device that facilitates the welding of the rim and spokes. Existing welding jigs typically consist of a base and positioning blocks. The base supports the workpiece, while the positioning blocks help position the workpiece. When submerged arc welding is used to weld the rim to spokes with large mounting surfaces, the large spoke mounting surface and a flatness of approximately 0.4° can lead to poor contact between the spoke and the weld jig, resulting in sparks. This can cause noticeable cosmetic defects on the spoke mounting surface, necessitating polishing and, in severe cases, resulting in product rejection.

[0003] Based on this, it is necessary to improve the existing welding jig. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the utility model provides a jig for preventing sparks from occurring on the spoke mounting surface during welding, thereby ensuring the quality of the product after welding.

[0005] To achieve the above-mentioned purpose, the present invention discloses a jig for preventing sparks on the spoke mounting surface during welding, comprising:

[0006] base;

[0007] convex columns, the convex columns are arranged in an array along the circumferential direction, and the upper surfaces of the convex columns protrude from the upper surface of the base;

[0008] a center positioning block connected to the center of the circumferential array of the bosses;

[0009] An adjusting arm, one end of which is detachably connected to the center of the central positioning block, and the other end of which extends to the boss, is provided with a level ruler.

[0010] Preferably, the adjusting arm includes a first arm, a second arm, a fixed seat, a movable seat and a ejector pin; a threaded hole is provided at the center of the center positioning block, the fixed seat is screwed into the threaded hole, and the movable seat is rotatably connected to the fixed seat; the first arm is slidably connected to the second arm, one end of the first arm is hinged to the movable seat, and the ejector pin is inserted into the other end of the second arm.

[0011] Preferably, the other end of the first arm is connected to a jackscrew for fixing the second arm.

[0012] Preferably, the second arm is provided with scale lines along the horizontal direction; and the ejector pin is provided with scale lines along the vertical direction.

[0013] Preferably, the boss is made of copper.

[0014] The utility model has the following technical effects:

[0015] 1. By setting the convex column, the large plane used to receive the workpiece is changed into a small plane, which reduces the contact area between the workpiece and the receiving surface, thereby reducing the possibility of sparks and ensuring product quality.

[0016] 2. The protruding column is made of copper with better conductivity, which further reduces the possibility of sparks.

[0017] 3. Through the design of the adjusting arm, it is possible to detect whether the boss has been worn, ensuring that the boss is always in good working condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the rim and spokes during welding;

[0020] Figure 3 It is a structural diagram of the adjusting arm;

[0021] Figure 4 This is a schematic diagram of the installation of the base and the boss.

[0022] In the figure, 1. base; 2. boss; 3. center hole positioning block; 301. threaded hole; 4. adjusting arm; 401. first arm; 402. second arm; 403. fixed seat; 404. movable seat; 405. thimble; 406. thimble; 5. level; 6. workpiece. DETAILED DESCRIPTION

[0023] The principles and features of the present invention are described below in conjunction with embodiments; the examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0024] A jig for preventing sparks from occurring on a spoke mounting surface during welding comprises a base 1, a boss 2, a center positioning block 3, and an adjusting arm 4.

[0025] The base 1 is circular, and six mounting holes are arranged in an array along the circumference of the base 1. The bosses 2 are arranged in an array along the circumference and correspond one-to-one to the mounting holes. The bosses 2 are connected to the mounting holes in an interference fit. During installation, it should be ensured that the upper surface of the boss 2 protrudes from the upper surface of the base 1. The upper surface of the boss 2 serves as the receiving surface for the workpiece 6. The number of mounting holes is not limited here, but since the upper surface of the boss 2 serves as the receiving surface for the workpiece 6, if the number is too small, the workpiece 6 will be unstable after being placed on it, and if the number is too large, it will not be able to prevent sparks. Generally, the number of bosses 2 is 3 to 8.

[0026] In the prior art, the upper surface of base 1 serves as the contact surface for workpiece 6. However, this large flat surface has a flatness error of approximately 0.4. Therefore, once workpiece 6 is placed on base 1, it is unlikely that workpiece 6 will completely adhere to the upper surface of base 1. The welding current is prone to sparking where workpiece 6 and base 1 are not in contact, thus affecting the weld quality of workpiece 6. By providing protruding pillar 2, the contact surface becomes the upper surface of protruding pillar 2, reducing the contact area between the contact surface and workpiece 6 and thus reducing the probability of sparking.

[0027] In terms of material selection, the protrusion 2 is made of copper, which has far better conductivity than the paste, and can quickly conduct the generated current, further reducing the probability of ignition.

[0028] The center positioning block 3 is connected to the center of the circumferential array of the boss 2, as shown in the attached figure. Figure 2 The center positioning block 3 is used to realize the positioning of the workpiece 6.

[0029] The function of the adjustment arm 4 is to detect whether the upper surfaces of all the bosses 2 are in the same plane. Specifically, the adjustment arm 4 includes a first arm 401, a second arm 402, a fixed seat 403, a movable seat 404, and a pin 405. A threaded hole 301 is provided at the center of the center positioning block 3, and an internal thread is provided in the threaded hole 301. The fixed seat 403 is screwed and fixed to the threaded hole 301; the movable seat 404 is rotatably connected to the fixed seat 403 via a bearing, and the movable seat 404 can rotate freely within 360 degrees; the first arm 401 and the second arm 402 are slidably connected, one end of the first arm 401 is hinged to the movable seat 404, and the other end of the first arm 402 is provided with a pin 406 for fixing the second arm 402. The pin 405 is plugged into the other end of the second arm 402. The end of the pin 405 is pointed, and the pin 405 can be supported on the upper surface of the boss 2. A level 5 is mounted on the adjustment arm 4 to detect any skew. If skew occurs, it indicates that the upper surfaces of the bosses 2 are not all aligned horizontally. The second arm 402 is provided with horizontal scale lines, while the ejector pin 405 is provided with vertical scale lines. These scale lines serve primarily as markers.

[0030] Since the boss 2 is prone to wear during use, it needs to be inspected regularly. Once the boss 2 is worn, it needs to be replaced. When using this device, first screw the fixing seat 403 into the threaded hole 301, overlap the ejector pin 405 on one of the bosses 2, and adjust the depth of the fixing seat 403 screwed into the threaded hole 301 to make the level 5 horizontal; then rotate the adjustment arm 4 so that the ejector pin 405 at the end of the adjustment arm 4 overlaps different bosses 2 in turn, and check whether the level 5 has changed. If there is any change, replace the corresponding boss 2. After the inspection is completed, remove the adjustment arm 4.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A jig for preventing sparks from the spoke mounting surface during welding, characterized in that: include: Base (1); convex columns (2), the convex columns (2) are arranged in an array along the circumferential direction, and the upper surfaces of the convex columns (2) protrude from the upper surface of the base (1); A center positioning block (3), the center positioning block (3) being connected to the center of the circumferential array of the bosses (2); An adjusting arm (4), one end of the adjusting arm (4) is detachably connected to the center of the central positioning block (3), the other end of the adjusting arm (4) extends to the boss (2), and a level (5) is provided on the adjusting arm (4).

2. The jig for preventing sparks on the spoke mounting surface during welding according to claim 1, characterized in that: The adjusting arm (4) comprises a first arm (401), a second arm (402), a fixed seat (403), a movable seat (404) and a thimble (405); a threaded hole (301) is provided at the center of the center positioning block (3), the fixed seat (403) is screwed into the threaded hole (301), and the movable seat (404) is rotatably connected to the fixed seat (403); the first arm (401) is slidably connected to the second arm (402), one end of the first arm (401) is hinged to the movable seat (404), and the thimble (405) is plugged into the other end of the second arm (402).

3. The jig for preventing sparks on the spoke mounting surface during welding according to claim 2, characterized in that: The other end of the first arm (401) is connected to a top screw (406) for fixing the second arm (402).

4. The jig for preventing sparks on the spoke mounting surface during welding according to claim 2, characterized in that: The second arm (402) is provided with scale lines along the horizontal direction; the ejector pin (405) is provided with scale lines along the vertical direction.

5. The jig for preventing sparks on the spoke mounting surface during welding according to claim 1, characterized in that: The boss (2) is made of copper.

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