A welding fixture for automobile rear axle half-shaft seats

Abstract

This utility model discloses a welding fixture for automotive rear axle half-shaft seats, characterized by: an ABS hole anti-misalignment welding slag baffle, a quick-change tooling base plate, a flange hole anti-misalignment welding slag quick-change pressure plate, a pneumatic cylinder, and a diamond-shaped locating pin; the ABS hole anti-misalignment welding slag baffle is disposed on the upper part of the quick-change tooling base plate; the quick-change tooling base plate is provided with two countersunk bolt holes and is connected and fixed to the welding equipment worktable through countersunk bolts, and the upper part is clearance-fitted with the half-shaft seat through a locating stop; the diamond-shaped locating pin is disposed on the quick-change tooling base plate and is clearance-fitted with the flange hole of the half-shaft seat; one end of the flange hole anti-misalignment welding slag quick-change pressure plate is connected to the pneumatic cylinder, and the other end is press-fitted with the flange hole of the half-shaft seat. This utility model can quickly respond to the needs of flexible production of multiple varieties and small batches, and significantly reduce product changeover time.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts processing technology, specifically relating to a welding fixture for automotive rear axle half-shaft seats. Background Technology

[0002] The rear axle of a car is a crucial component connecting the vehicle body and wheels, transmitting torque, and providing load-bearing support. The coaxiality design of the axle housing is critical to the rear axle, ensuring smooth torque transmission and thus providing good ride comfort, while also enhancing fatigue durability for the axle. In existing technologies, welding is required during the fabrication and assembly of the axle housing. However, welding presents the following problems:

[0003] 1. There are many types of products, and the production process requires rapid model changeover, but similar product appearances may lead to mixed packaging;

[0004] 2. During welding operations, welding slag may splatter into the mounting holes, leading to improper installation;

[0005] 3. Different products require different tooling, resulting in high tooling costs.

[0006] Therefore, there is a need for a welding fixture that is simple in design, low in cost, quick to change over, and highly adaptable to accommodate welding operations of various types and small batches. Utility Model Content

[0007] The purpose of this utility model is to provide a welding fixture for automotive rear axle half-shaft seats to solve the problems in the prior art.

[0008] This utility model is achieved through the following technical solution: a welding fixture for automotive rear axle half-shaft seats, characterized in that: it includes an ABS hole anti-misalignment welding slag baffle, a quick-change tooling base plate, a flange hole anti-welding slag quick-change pressure plate, a pneumatic cylinder, and a diamond-shaped positioning pin.

[0009] The ABS hole anti-weld slag baffle is set on the upper part of the quick-change tooling base plate; the quick-change tooling base plate is provided with two countersunk bolt holes and is connected and fixed to the welding equipment worktable through countersunk bolts, and the upper part is fitted with the half shaft seat through a positioning stop; the diamond positioning pin is set on the quick-change tooling base plate and is fitted with the flange hole of the half shaft seat; one end of the flange hole anti-weld slag quick-change pressure plate is connected to the pneumatic cylinder, and the other end is pressed into the flange hole of the half shaft seat.

[0010] Furthermore: the ABS hole anti-weld slag baffle is connected to the threaded hole on the quick-change tooling base plate and mates with the ABS hole of the half-shaft seat.

[0011] Furthermore, the flange hole anti-welding slag quick-change pressure plate is arc-shaped.

[0012] The beneficial effects of this utility model are as follows: The quick-change tooling base plate of this utility model is symmetrically equipped with flange hole anti-weld slag quick-change pressure plate mechanism and pneumatic cylinder on both sides. The ABS hole anti-weld slag baffle is located at the upper part of the quick-change tooling base plate, and the quick-change tooling base plate is located at the bottom middle position. All mechanisms can be quickly installed and disassembled, meeting the needs of rapid positioning of the half-shaft seat product. The clamping mechanism uses pneumatic clamping. Therefore, its structure is simple, its design is reasonable, and it is compatible with anti-misalignment and anti-weld slag splashing functions. The operation is simple, the positioning is accurate, and the fixture processing and manufacturing cycle is short. It can quickly meet the needs of flexible production of multiple varieties and small batches, significantly reducing product changeover time. The fixture structure design is simplified, the processing and manufacturing cost is low, the change cycle is short, and it can respond to product design changes at any time. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the quick-change tooling base plate and diamond pin structure of this utility model;

[0015] The numbers in the diagram are explained as follows: 1 is the ABS hole anti-weld slag baffle, 2 is the quick-change tooling base plate, 3 is the flange hole anti-weld slag quick-change pressure plate, 4 is the pneumatic cylinder, 5 is the diamond-shaped locating pin, 6 is the locating stop, 7 is the threaded hole, 8 is the countersunk bolt hole, and 9 is the half-shaft seat. Detailed Implementation

[0016] like Figure 1 The diagram shows a welding fixture for a rear axle shaft seat of an automobile, comprising an ABS hole anti-misalignment weld slag baffle 1, a quick-change tooling base plate 2, a flange hole anti-misalignment weld slag quick-change pressure plate 3, a pneumatic cylinder 4, and a diamond-shaped positioning pin 5. The ABS hole anti-misalignment weld slag baffle 1 is fixed to the quick-change tooling base plate 2 via bolt holes. The lower part of the quick-change tooling base plate 2 is connected to the welding equipment via two countersunk bolt holes 8, and the upper part is fitted with the half-shaft seat 9 via a positioning stop 6 with a clearance fit, ensuring the overall positioning accuracy of the fixture. The flange hole anti-misalignment weld slag quick-change pressure plate 3 is designed with two bolt holes for quick bolt connection and fixation with the pneumatic cylinder 4. The diamond-shaped positioning pin 5 is interference-fitted with the pin hole of the quick-change tooling base plate 2 for positioning. By starting the welding equipment, the automobile rear axle shaft seat welding fixture and the half-shaft seat rotate to achieve circumferential welding. The tooling for different half-shaft seat 9 products can be quickly switched by removing the two bolts on the quick-change tooling base plate 2.

[0017] The ABS hole anti-misfit welding slag baffle 1 is connected to the upper threaded hole 7 of the quick-change tooling base plate 2 and is installed close to the upper part of the ABS hole of the half-shaft seat 9. The two are in contact or clearance fit, which can prevent misfitting between different products and prevent welding slag from splashing into the ABS hole.

[0018] The quick-change tooling base plate 2 is designed with two countersunk bolt holes 8 to facilitate the quick replacement of the automotive rear axle half-shaft seat welding fixture. After heat treatment and tempering, the upper and lower surfaces of the quick-change tooling base plate 2 are ground flat by a grinding machine, and the positioning stop 6 is precision ground to achieve the clearance fit accuracy between the positioning stop 6 and the stop of the half-shaft seat 9, ensuring the overall positioning accuracy of the tooling.

[0019] The flange hole anti-weld slag quick-change pressure plate 3 adopts a contour-following design, with an overall shape resembling an arc or Y, to achieve the clamping function and simultaneously block the flange hole position of the half-shaft seat 9, preventing weld slag from splashing into the hole. It is connected to the pneumatic cylinder 4 through two bolt holes to realize the clamping and releasing actions.

[0020] The pneumatic cylinder 4 is a lever clamping cylinder.

[0021] The pneumatic cylinder is fixed to the welding platform. The pneumatic cylinder is equipped with a support rod 41 and a connecting arm 42. The connecting arm is bolted to the flange hole anti-weld slag quick-change pressure plate 3, and one end of the connecting arm is hinged to the piston rod of the pneumatic cylinder. One end of the support rod is hinged to the cylinder body of the pneumatic cylinder, and the other end is hinged to the connecting arm. This structure allows the clamping and loosening of the flange hole anti-weld slag quick-change pressure plate 3 to be achieved through the movement of the piston rod.

[0022] The working process of this utility model is as follows:

[0023] The quick-change tooling base plate 2 is fixed on the welding equipment workbench. The stop of the half-shaft seat 9 to be welded is placed in the positioning stop 6 of the quick-change tooling base plate 2. The flange hole of the half-shaft seat 4 and the diamond positioning pin 5 are fitted with clearance to achieve circumferential positioning. Automatic welding of the small end stop of the half-shaft seat 9 is achieved by rotating the welding equipment workbench.

[0024] This utility model employs a quick-change tooling base plate structure, which facilitates chamfering of the half-shaft seats by production line operators while reducing the time and difficulty of tooling changes during product replacement. This structure can avoid or significantly reduce the assembly problems caused by weld slag inside flange holes, and the anti-misalignment weld slag baffle for ABS holes can avoid or significantly reduce weld slag problems inside ABS holes, achieving error prevention between different half-shaft seat products. This tooling has low manufacturing costs, is easy to operate, and can readily adapt to changes in production varieties.

Claims

1. An automotive rear axle half shaft seat welding fixture, characterized by: Includes ABS hole anti-weld slag baffle (1), quick-change tooling base plate (2), flange hole anti-weld slag quick-change pressure plate (3), pneumatic cylinder (4), and diamond positioning pin (5); The ABS hole anti-slag baffle (1) is set on the upper part of the quick-change tooling base plate (2); the quick-change tooling base plate (2) is provided with two countersunk bolt holes (8) and is connected and fixed to the welding equipment workbench by countersunk bolts, and the upper part is fitted with the half shaft seat (9) through the positioning stop (6); the diamond positioning pin (5) is set on the quick-change tooling base plate (2) and is fitted with the flange hole of the half shaft seat (9) with clearance; one end of the flange hole anti-slag quick-change pressure plate (3) is connected to the pneumatic cylinder (4), and the other end is pressed into the flange hole of the half shaft seat (9).

2. The automotive rear axle half-shaft seat welding fixture according to claim 1, characterized in that: The ABS hole anti-misalignment welding slag baffle (1) is connected to the threaded hole (7) on the quick-change tooling base plate (2) and is matched with the ABS hole of the half shaft seat (9).

3. The automotive rear axle half shaft seat welding fixture according to claim 1, characterized in that: The flange hole anti-welding slag quick-change pressure plate (3) is arc-shaped.

4. The automotive rear axle half shaft seat welding fixture according to claim 1, characterized in that: The pneumatic cylinder (4) is a lever clamping cylinder.

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