CN220354325U

CN220354325U - Part structure for solving welding air holes

Info

Publication number: CN220354325U
Application number: CN202320778391.4U
Authority: CN
Inventors: 徐红军; 朱少青; 姚奇杰
Original assignee: Wanxiang Group Corp; Wanxiang Qianchao Transmission Shaft Co Ltd
Current assignee: Wanxiang Group Corp; Wanxiang Qianchao Transmission Shaft Co Ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2024-01-16
Anticipated expiration: 2033-04-11

Abstract

The utility model provides a part structure for solving a welding air hole, which comprises a part A and a part B, wherein the outer circle of the smooth surface of the part A is in interference fit with the inner hole of the smooth surface of the part B, and an exhaust channel is arranged at the matched position of the outer circle of the smooth surface of the part A pressed into a gear and the inner hole of the smooth surface of the part B, so that the internal pressure and the external pressure of a cavity are consistent when welding seams are overlapped. The beneficial effects of the utility model are as follows: by adding the press-in gear excircle threading, knurling or notch milling in the part manufacturing and processing technology, the heating expansion exhaust efficiency of the gas in the cavity is improved under the condition that the structural strength of the existing product is not damaged, the consistency of the internal and external pressure of the cavity during welding seam lap joint is ensured, and the problem of welding air holes is solved.

Description

Part structure for solving welding air holes

Technical Field

The utility model relates to a welding structure, in particular to a part structure for solving the problem of welding air holes.

Background

In the prior art, as shown in fig. 1, a welding fork of a part A1 and a shaft tube of a part B2 are welded, the matching position of the part A1 is a smooth surface outer circle structure, and the matching position of the part B2 is a smooth surface inner hole structure. As shown in fig. 2, the welding is performed after the interference press fitting of the outer circle of the smooth surface and the inner hole of the smooth surface, a large amount of heat is generated in the welding process of fusion welding, the gas in the cavity is heated and expanded, so that the pressure difference formed in the cavity and outside the cavity generates an exhaust phenomenon, and the pressure balance cannot be quickly achieved in a short time due to unsmooth exhaust, so that the expanded gas still is exhausted when the welding seam 3 is overlapped in a tail-end mode, and welding pores are formed at the welding seam overlapping position due to unsmooth exhaust when welding. This problem is exacerbated when press-fit type welds are used where the press-in profile length is long.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a part structure for solving the problem of welding air holes, which overcomes the air holes generated during fusion welding, avoids poor welding and improves welding reliability.

The aim of the utility model is achieved by the following technical scheme. The utility model provides a solve part structure of welding gas pocket, includes part A and part B, part A's plain noodles excircle is interference fit with part B's plain noodles hole, part A is pressed in the cooperation department of shelves plain noodles excircle and part B's plain noodles hole and is provided with the exhaust passage for the inside and outside pressure of cavity is unanimous when the welding seam overlap joint.

Further, the exhaust passage has a structure that: the part A is pressed into the smooth surface excircle of the gear, and the thread and the smooth surface inner hole of the part B are matched to form an exhaust channel.

Further, the exhaust passage has a structure that: knurling is arranged on the excircle of the smooth surface of the part A1 pressed in, and the threads are matched with the inner hole of the smooth surface of the part B to form an exhaust channel.

Further, the exhaust passage has a structure that: a plurality of notches are formed on the outer circle of the smooth surface of the part A1 pressed in, and the notches and the inner hole of the smooth surface of the part B are matched to form an exhaust channel.

Furthermore, the plurality of notches are uniformly distributed along the circumferential direction.

The beneficial effects of the utility model are as follows: by adding the press-in gear excircle threading, knurling or notch milling in the part manufacturing and processing technology, the heating expansion exhaust efficiency of the gas in the cavity is improved under the condition that the structural strength of the existing product is not damaged, the consistency of the internal and external pressure of the cavity during welding seam lap joint is ensured, and the problem of welding air holes is solved.

Drawings

Fig. 1 is a schematic diagram of a prior art structure.

Fig. 2 is a schematic diagram of an assembled structure of the prior art.

Fig. 3 is a schematic structural diagram of embodiment 1 of the present utility model.

Fig. 4 is a schematic structural diagram of embodiment 2 of the present utility model.

Fig. 5 is a schematic structural diagram of embodiment 3 of the present utility model.

Fig. 6 is a cross-sectional view A-A of fig. 5.

Reference numerals illustrate: part A1, part B2, weld 3, threads 4, knurls 5, notches 6.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the embodiments described below or technical features may be arbitrarily combined to form new embodiments.

The utility model provides a part structure for solving a welding air hole, which comprises a part A1 and a part B2, wherein the outer circle of a smooth surface of the part A1 is in interference fit with the inner hole of the smooth surface of the part B2, and an exhaust channel is arranged at the joint of the outer circle of the smooth surface of the part A1 pressed in a gear and the inner hole of the smooth surface of the part B2, so that the internal pressure and the external pressure of a cavity are consistent when welding seams 3 are overlapped.

Example 1: as shown in fig. 2, the exhaust passage has a structure as follows: and a thread 4 is arranged on the outer circle of the smooth surface of the part A1 pressed in, and the thread 4 and the smooth surface inner hole of the part B2 are matched to form an exhaust channel.

Example 2: as shown in fig. 4, the exhaust passage has a structure as follows: the outer circle of the smooth surface of the part A1 pressed in is provided with knurling 5, and the matching of the threads 5 and the inner hole of the smooth surface of the part B2 forms an exhaust channel.

Example 3: as shown in fig. 5-6, the exhaust passage has the structure that: the part A1 is pressed into the outer circle of the smooth surface of the gear, 3 notches 6 are uniformly distributed along the circumferential direction, and the notches 6 and the inner hole of the smooth surface of the part B2 are matched to form an exhaust channel.

The utility model improves the exhaust efficiency by improving the part structure, so that the pressure balance between the inside and the outside of the cavity is quickly achieved, the problem that the exhaust is still performed when welding seams are overlapped is solved, and welding air holes are eliminated.

According to the utility model, the interference fit welding with longer press-in gear length is improved, the welding air holes are eliminated, the rapid exhaust can be performed through threads, knurling or gaps, and the processing is convenient.

It should be understood that equivalents and modifications to the technical scheme and the inventive concept of the present utility model should fall within the scope of the claims appended hereto.

Claims

1. The utility model provides a solve part structure of welding gas pocket, includes part A (1) and part B (2), and the plain noodles excircle of part A (1) is interference fit with the plain noodles hole of part B (2), its characterized in that: the part A (1) is pressed into the matching position of the gear smooth surface excircle and the smooth surface inner hole of the part B (2) to be provided with an exhaust passage, so that the internal and external pressures of the cavity are consistent when the welding seams (3) are overlapped.

2. The component structure for solving the problem of welding blowholes according to claim 1, wherein: the structure of the exhaust passage is as follows: the part A (1) is pressed into the outer circle of the smooth surface of the gear, and a thread (4) is arranged on the outer circle of the smooth surface of the gear, and the thread (4) is matched with an inner hole of the smooth surface of the part B (2) to form an exhaust passage.

3. The component structure for solving the problem of welding blowholes according to claim 1, wherein: the structure of the exhaust passage is as follows: the part A (1) is pressed into the outer circle of the smooth surface of the gear, knurling (5) is arranged on the outer circle of the smooth surface of the gear, and the threads (4) and the inner hole of the smooth surface of the part B (2) are matched to form an exhaust channel.

4. The component structure for solving the problem of welding blowholes according to claim 1, wherein: the structure of the exhaust passage is as follows: a plurality of notches (6) are formed on the outer circle of the smooth surface of the part A (1) pressed in, and the notches (6) and the inner holes of the smooth surface of the part B (2) are matched to form an exhaust channel.

5. The component structure for solving the problem of welding blowholes according to claim 4, wherein: the notches (6) are uniformly distributed along the circumferential direction.