Root rolling strengthening tool for right-angle pipe joint

Abstract

A root rolling strengthening tool for a right-angle pipe joint comprises a rolling wheel, a bearing, a gasket, a cutter bar, a locking nut and a positioning screw. Bearings are mounted on the inner sides of the rollers; after the positioning screw rod penetrates through the bearing, the gasket and the cutter bar from left to right, the locking nut is fixed on the right side of the positioning screw rod; the rolling wheel and the cutter bar are made of W6Mo5Cr4V2, the hardness HRC62-66 is achieved through quenching and tempering heat treatment, the final surface treatment is passivated, and the bearing, the gasket, the locking nut and the positioning screw rod are all standard parts. When simple rolling strengthening is used, interference with a product is avoided, the problems that rolling lines are irregular, and the product is damaged and even scrapped are avoided, and therefore the roughness requirement specified by the standard is met; the requirement on the skill level of an operator is low; machining efficiency is high, and production cost is reduced; the machining quality is stable and reliable, and the product percent of pass is improved; the rolling tool is simple in structure, easy to machine and manufacture and low in cost, and the positioning bolt, the locking nut, the bearing and the gasket are standard parts and are convenient to purchase.

Description

Technical Field

[0001] The invention relates to a right-angle pipe joint root rolling reinforcement tool, belonging to the technical field of manufacturing mechanical processing parts. Background Art

[0002] like Figure 1 As shown, since this type of right-angle pipe joint needs to be assembled with a tightening nut at the C end, the shortcomings of poor sealing and complex assembly of the right-angle pipe joints used on existing aircraft can be solved. The right-angle pipe joint with a tightening nut has the advantages of good structural sealing, simple assembly, and the nut is not easy to fall off after assembly.

[0003] Therefore, pipe fittings with tightening nuts are often used in the connection of gas and oil circuits of aircraft and aero-engines. They are used frequently and in great demand. This type of right-angle pipe fittings is produced frequently and in large quantities.

[0004] This type of right-angle pipe joint needs to be assembled with a tightening nut at the C end. In order to increase the strength of the pipe joint assembly, cold rolling and strengthening is required at A and B.

[0005] Due to the irregular shape and structure of the right-angle pipe joint and the limited processing position, the traditional rolling tooling is not equipped with bearings, which will interfere with the product during rolling strengthening, resulting in irregular rolling patterns, product damage or even scrapping, and cannot meet the roughness requirements specified in the standard. Summary of the invention

[0006] The present invention aims to solve the technical problem that due to factors such as the irregular shape and structure of the right-angle pipe joint and the limited processing position, the traditional rolling tooling is not equipped with bearings, which will interfere with the product during rolling strengthening, resulting in irregular rolling patterns and product damage or even scrapping, and the roughness requirements specified in the standard cannot be met.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: A right-angle pipe joint root rolling strengthening tooling, comprising a roller, a bearing, a washer, a knife rod, a locking nut, and a positioning screw; A bearing is installed on the inner side of the roller; After the positioning screw passes through the bearing, washer, and cutter rod from left to right, fix the locking nut on the right side of the positioning screw; The roller and tool rod are made of W6Mo5Cr4V2, which reaches a hardness of HRC62-66 after quenching and tempering heat treatment. The final surface treatment is passivation. The bearings, washers, locking nuts and positioning screws are all standard parts.

[0008] The beneficial effects of adopting the above technical solution are: The present invention is easy to use and will not interfere with the product during rolling strengthening, so it will not cause irregular rolling patterns, product damage or even scrapping, thereby meeting the roughness requirements specified in the standard; it has low requirements on the skill level of the operator; it has high processing efficiency and reduces production costs; the processing quality is stable and reliable, and the product qualification rate is improved; the rolling tooling has a simple structure, is easy to process and manufacture, and has a low cost; the positioning bolts, locking nuts, bearings, and washers are standard parts and are easy to purchase. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of a right-angle pipe joint.

[0010] Figure 2 It is a schematic diagram of the structure of the tooling for rolling and strengthening the root of the right-angle pipe joint of the present invention.

[0011] In the figure: 1-roller, 2-bearing, 3-washer, 4-tool bar, 5-locking nut, 6-positioning screw.

[0012] Figure 3 It is a schematic diagram of the rolling principle structure of the right-angle pipe joint root rolling strengthening tooling of the present invention. DETAILED DESCRIPTION

[0013] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] Rolling strengthening tooling according to the right angle pipe joint, such as Figure 1 The shape and size shown are used as the design basis of the tooling, and a stable and reliable rolling strengthening tooling is designed according to the processing requirements.

[0015] A right-angle pipe joint root rolling strengthening tooling, comprising a roller 1, a bearing 2, a washer 3, a knife rod 4, a locking nut 5, and a positioning screw 6; A bearing 2 is installed inside the roller 1. The installation of the bearing 2 solves the technical problem that the rolling strengthening will interfere with the product, resulting in irregular rolling patterns, product damage or even scrapping, and failure to meet the roughness requirements specified in the standard; After the positioning screw 6 passes through the bearing 2, the washer 3, and the knife rod 4 from left to right, the locking nut 5 is fixed on the right side of the positioning screw 6; The materials of the roller 1 and the shank 4 are W6Mo5Cr4V2, which reaches the hardness of HRC62-66 after quenching and tempering heat treatment, and the final surface treatment is passivation. The bearing 2, washer 3, locking nut 5 and positioning screw 6 are all standard parts.

[0016] Will Figure 2 The rolling strengthening tooling shown is Figure 1 The right angle pipe joint shown needs to be strengthened at the part fitting, such as Figure 3 As shown, rolling can be carried out.

[0017] Compared with the traditional rolling strengthening tooling, the present invention can bring the following beneficial effects: 1. Easy to use, requiring low operator skill level; 2. High processing efficiency and reduced production costs; 3. The processing quality is stable and reliable, which improves the product qualification rate; 4. The rolling tooling has a simple structure, is easy to process and manufacture, has low cost, and the positioning bolts, locking nuts, bearings, and washers are standard parts, making them easy to purchase.

Claims

1. A right-angle pipe joint root rolling strengthening tool, characterized in that: It comprises a roller (1), a bearing (2), a washer (3), a knife bar (4), a locking nut (5), and a positioning screw (6); A bearing (2) is installed inside the roller (1); After the positioning screw (6) passes through the bearing (2), the washer (3), and the knife rod (4) from left to right, the locking nut (5) is fixed on the right side of the positioning screw (6); The roller (1) and the shank (4) are made of W6Mo5Cr4V2, which is subjected to quenching and tempering heat treatment to reach a hardness of HRC62-66, and the final surface treatment is passivation; The bearing (2), washer (3), lock nut (5) and positioning screw (6) are all standard parts.

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