Special clamp for vehicle pipeline welding joint

Abstract

The utility model relates to a special fixture for turning a pipeline welding joint, which comprises a positioning seat and is technically characterized in that an annular positioning sleeve is arranged at the front end of the positioning seat, a horizontal threaded hole concentric with the annular positioning sleeve is arranged in the middle of the positioning seat, the outer peripheral surface of the front end of the annular positioning sleeve is an expanded surface, and the inner peripheral surface of the front end of the annular positioning sleeve is a conical surface with a wide front part and a narrow rear part; a plurality of separation openings are evenly formed in the annular positioning sleeve so that a plurality of positioning petals can be formed at the front end of the annular positioning sleeve, a cone-shaped mandrel is arranged in the annular positioning sleeve, a T-shaped hole is formed in the center of the cone-shaped mandrel, and the rod portion of the hexagon socket cap screw penetrates through the T-shaped hole and is in threaded connection with the horizontal threaded hole of the positioning seat. The clamp is good in clamping stability, the positioning accuracy is remarkably improved, the product size is guaranteed, and the percent of pass of products is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation parts manufacturing, and particularly relates to a special fixture for a vehicle pipeline welding joint, which is applicable to the operation of turning the end face of the welding joint. Background Art

[0002] As is well known, after the pipeline welding joint is welded, it usually needs to carry out the operation of turning the end face. However, there are the following problems: the positioning tooling for the welding joint has a narrow application range and is inconvenient to operate. Content of the Utility Model

[0003] The purpose of the utility model is to provide a special fixture for a vehicle pipeline welding joint with reasonable structure and reliable use, which has good clamping stability, significantly improves the positioning accuracy, ensures the product size, and further improves the qualified rate of the product.

[0004] The technical solution of the utility model is as follows:

[0005] A special fixture for a vehicle pipeline welding joint includes a positioning seat. The technical key points are: an annular positioning sleeve is arranged at the front end of the positioning seat, a horizontal threaded hole concentric with the annular positioning sleeve is arranged in the middle of the positioning seat, the outer peripheral surface of the front end of the annular positioning sleeve is an expanded diameter surface and the inner peripheral surface of the front end is a tapered surface that is wider at the front and narrower at the rear, a plurality of separating openings are evenly arranged on the annular positioning sleeve so that a plurality of positioning petals are formed at the front end of the annular positioning sleeve, a conical core shaft is arranged in the annular positioning sleeve, a T-shaped hole is arranged at the center of the conical core shaft, and the rod part of the inner hexagon socket head cap screw passes through the T-shaped hole and is in threaded connection with the horizontal threaded hole of the positioning seat.

[0006] For the above-mentioned special fixture for a vehicle pipeline welding joint, a limit pin is arranged on the rod part of the inner hexagon socket head cap screw.

[0007] For the above-mentioned special fixture for a vehicle pipeline welding joint, the number of the separating openings is 4.

[0008] For the above-mentioned special fixture for a vehicle pipeline welding joint, an expanded diameter mounting disc is arranged at the rear end of the positioning seat.

[0009] The beneficial effects of the utility model are as follows:

[0010] During use, the pipeline welding joint is sleeved on the outer periphery of the annular positioning sleeve, and the inner hexagon socket head cap screw is screwed, so that the center of the conical core shaft moves axially inwards, the annular positioning sleeve is extruded by the tapered surface, and the positioning petals of the annular positioning sleeve generate radial movement, thereby radially expanding and tightening the pipeline welding joint to realize clamping and positioning. It is applicable to pipeline welding joints of various sizes, is convenient and fast to operate, has good clamping stability, significantly improves the positioning accuracy, ensures the product size, and further improves the qualified rate of the product. Description of the Drawings

[0011] Figure 1 is the structural schematic diagram of the present utility model;

[0012] Figure 2 is Figure 1 the left view of

[0013] Figure 3 is the structural schematic diagram of the positioning seat of the present utility model;

[0014] Figure 4 is Figure 3 the sectional view taken along the line A-A of

[0015] Figure 5 is Figure 4 the enlarged view of part B in

[0016] Figure 6 is the structural schematic diagram of the mandrel of the present utility model.

[0017] In the figure: 1. positioning seat, 101. diameter-expanded mounting disc, 102. separation opening, 103. horizontal threaded hole, 104. diameter-expanded surface, 105. tapered surface, 2. annular positioning sleeve, 3. pipeline welding joint, 4. conical mandrel, 401. T-shaped hole, 5. hexagon socket head cap screw, 6. limit pin. Specific embodiments

[0018] The present utility model will be described in detail according to the accompanying drawings of the specification.

[0019] As Figures 1 to 6 shown, the special fixture for the pipeline welding joint of the vehicle includes a positioning seat 1.

[0020] Among them, an annular positioning sleeve 2 is provided at the front end of the positioning seat 1, and a horizontal threaded hole 103 concentric with the annular positioning sleeve 2 is provided in the middle of the positioning seat 1. The outer peripheral surface of the front end of the annular positioning sleeve 2 is a diameter-expanded surface 104 and the inner peripheral surface of the front end is a tapered surface 105 that is wider at the front and narrower at the rear. A plurality of separation openings 102 are uniformly provided on the annular positioning sleeve 2 so that a plurality of positioning flaps are formed at the front end of the annular positioning sleeve 2. A conical mandrel 4 is provided in the annular positioning sleeve 2, a T-shaped hole 401 is provided at the center of the conical mandrel 4, and the rod portion of the hexagon socket head cap screw 5 passes through the T-shaped hole 401 and is threadedly connected to the horizontal threaded hole 103 of the positioning seat 1.

[0021] In this embodiment, a limit pin 6 is provided on the rod portion of the hexagon socket head cap screw 5 to prevent it from separating from the mandrel 4. The number of the separation openings 102 is 4. An expanded diameter mounting disc 101 is provided at the rear end of the positioning seat 1 for installation with the working equipment.

[0022] Working principle:

[0023] Put 3 sets of pipeline welding joints on the outer periphery of the annular positioning sleeve 2. Turn the hexagon socket head cap screw 5 to drive the center of the conical mandrel 4 to move axially inward. Use the conical surface to squeeze the annular positioning sleeve 2, and the positioning lobes of the annular positioning sleeve 2 will generate radial movement, so as to radially tighten the pipeline welding joint 3, realize clamping and positioning. After completing the clamping and positioning of the parts, carry out machining.

[0024] The above has described the embodiments of the present invention in detail, but the above content is only the preferred embodiment of the present invention and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope covered by this patent.

Claims

1. A special fixture for welding joints of vehicle pipelines, including a positioning seat, characterized in that: An annular locating sleeve is provided at the front end of the locating seat, a horizontal threaded hole concentric with the annular locating sleeve is provided in the middle of the locating seat, the outer circumferential surface of the front end of the annular locating sleeve is an expanded diameter surface, and the inner circumferential surface of the front end is a conical surface which is wide at the front and narrow at the rear, a plurality of partition openings are evenly arranged on the annular locating sleeve so that a plurality of locating petals are formed at the front end of the annular locating sleeve, a conical core shaft is provided in the annular locating sleeve, a T-shaped hole is provided at the center of the conical core shaft, and the rod of the hexagon socket head screw passes through the T-shaped hole and is threadedly connected with the horizontal threaded hole of the locating seat.

2. The special clamp for vehicle pipeline welding joints according to claim 1 is characterized in that: A limiting pin is arranged on the rod portion of the hexagon socket head screw.

3. The special clamp for welding joints of vehicle pipelines according to claim 1 is characterized in that: The number of the partition openings is 4.

4. The special clamp for vehicle pipeline welding joints according to claim 1 is characterized in that: The rear end of the positioning seat is provided with an enlarged diameter mounting plate.

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