Post-pulling type anti-deformation welding tool for electron beam machining

Abstract

The utility model discloses a post-pulling type anti-deformation welding tool for electron beam processing, which comprises a base, a pull rod, a flange, a pull claw and a gland, the base is arranged on a driving main shaft of an electron beam welding machine, and the middle part of the base is connected with a corresponding part of the pull rod through a linear bearing; one end of the pull rod is fixedly connected with the middle of the flange, pull claws are distributed on the flange and are perpendicular to bolts, and the gland is arranged in the middle of the distributed pull claws. The pressing device is reasonable in structural design, pressing force can be applied to the part to be welded in advance, the pre-tightening force is made to be larger than the welding seam contraction force, welding deformation is effectively restrained, and the restraining effect on the welding deformation is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electron beam welding, and in particular to electron beam welding of mechanical parts with a circular end face weld. Specifically, it is a pull-back anti-deformation welding fixture for electron beam processing. Background Technology

[0002] Electron beam welding boasts high energy density, fast welding speed, deep and narrow welds, a small heat-affected zone, and minimal welding deformation. In the machining of automotive transmission gears, some gear components, due to the close axial distance between adjacent gear rings, cannot utilize efficient hobbing methods during gear cutting. A solution is to first disassemble the gear into two parts for separate machining, and then weld them together using an electron beam. This method improves the machinability of the parts, results in significantly higher connection quality than other connection methods, and reduces production costs. Therefore, electron beam welding is a highly ideal method for automotive gears.

[0003] However, for some special parts, such as thin-walled, lightweight gears, the relatively small deformation produced by electron beam welding is still unacceptable. Therefore, measures must be taken to prevent welding deformation. To address this issue, a pull-back type anti-deformation welding fixture for electron beam processing is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a pull-back anti-deformation welding fixture for electron beam processing in order to solve the above problems.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a pull-back anti-deformation welding fixture for electron beam processing, comprising a base, a pull rod, a flange, pull claws, and a pressure cap. The base is mounted on the drive spindle of an electron beam welding machine, and the middle part of the base is connected to the corresponding part of the pull rod through a linear bearing. One end of the pull rod is fixedly connected to the middle part of the flange. Pull claws are mounted on the flange with vertical bolts distributed on it, and the pressure cap is located at the middle position of the distributed pull claws.

[0006] Preferably, the pull rod, the flange, and the pull claw are connected by threads to form a whole, and the whole can move up and down relative to each other within the volume-limited space of the base.

[0007] Preferably, the pull rod moves up and down within the central hole of the electron beam welding machine drive spindle via a telescopic device, and the telescopic device is either a pneumatic cylinder or a hydraulic cylinder.

[0008] Preferably, the corresponding part of the pull rod is in sliding and sealed contact with the drive spindle of the electron beam welding machine through multiple O-rings.

[0009] Preferably, the gland has multiple internal holes distributed inside, and each internal hole corresponds to a welding position.

[0010] Compared with the prior art, the advantages of this utility model are: it can apply a clamping force to the parts to be welded in advance, so that the pre-tightening force is greater than the weld shrinkage force, effectively suppressing the occurrence of welding deformation and achieving the effect of suppressing welding deformation. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] In the diagram: 1. Base; 2. Tie rod; 3. Flange; 4. Pull claw; 5. Pressure cap. Detailed Implementation

[0014] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Please see Figure 1As shown, a pull-back anti-deformation welding fixture for electron beam processing includes a base 1, a pull rod 2, a flange 3, pull claws 4, and a pressure cap 5. The base 1 is mounted on the drive spindle of an electron beam welding machine, and the middle part of the base 1 is connected to the corresponding part of the pull rod 2 through a linear bearing. One end of the pull rod 2 is fixedly connected to the middle part of the flange 3. The flange 3 is equipped with pull claws 4 by vertical bolts. The pressure cap 5 is located in the middle of the distributed pull claws 4.

[0018] The pull rod 2, the flange 3, and the pull claw 4 are connected by threads to form a whole, and the whole can move up and down relative to each other within the volume-limited space of the base 1. The pull rod 2 moves up and down in the center hole of the drive spindle of the electron beam welding machine through a telescopic device, and the telescopic device is one of a cylinder or a hydraulic cylinder.

[0019] Furthermore, the corresponding part of the pull rod 2 is in sliding and sealed contact with the electron beam welding machine drive spindle through multiple O-ring rubber seals.

[0020] Furthermore, the pressure cap 5 has multiple internal holes distributed inside, and each internal hole corresponds to a welding position.

[0021] Working principle:

[0022] Step 1. The base 1 is installed on the drive spindle of the electron beam welding machine so that its rotational accuracy meets the minimum requirements of the electron beam welding process.

[0023] Step 2. The up and down movement of the pull rod 2 within the central hole of the electron beam welding machine drive spindle is driven by a cylinder, hydraulic cylinder, etc. at the atmospheric end. Multiple O-rings are used between the pull rod 2 and the electron beam welding machine drive spindle to achieve sliding sealing, ensuring that the pull rod does not cause vacuum leakage when moving up and down.

[0024] Step 3. The pull rod 2, the flange 3, and the pull claw 4 are connected by threads to form a whole, which can move up and down relative to each other within the volume-limited space of the base 1;

[0025] Step 4. Place the part to be welded on the base 1, and then cover the upper surface of the part with the pressure cap 5. The inner hole of the pressure cap 5 can expose the part to be welded.

[0026] Step 5. Rotate the pressure cap 5 slightly along the workpiece's own axis of rotation so that the hook of the pull claw 4 can just hook the edge of the pressure cap.

[0027] Step 6. Drive the pneumatic or hydraulic cylinder to move the pull rod 2 down, which in turn moves the flange 3 and the pull claw 4 to tighten the pressure cover 5. The pressure cover 5 applies a large preload to the welded parts. By adjusting the system parameters, the preload is made to be greater than the weld shrinkage force, thereby suppressing the welding deformation.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pull-back anti-deformation welding fixture for electron beam processing, characterized in that: The assembly includes a base (1), a pull rod (2), a flange (3), pull claws (4), and a pressure cap (5). The base (1) is mounted on the drive spindle of the electron beam welding machine, and the middle part of the base (1) is connected to the corresponding part of the pull rod (2) through a linear bearing. One end of the pull rod (2) is fixedly connected to the middle part of the flange (3). The flange (3) is equipped with pull claws (4) by vertical bolts. The pressure cap (5) is located in the middle of the distributed pull claws (4).

2. The back-pull anti-deformation welding fixture for electron beam processing according to claim 1, characterized in that: The pull rod (2), the flange (3), and the pull claw (4) are connected by threads to form a whole, and the whole can move up and down relative to each other within the volume-limited space of the base (1).

3. The back-pull anti-deformation welding fixture for electron beam processing according to claim 1, characterized in that: The pull rod (2) moves up and down in the center hole of the drive spindle of the electron beam welding machine through a telescopic device, and the telescopic device is one of a cylinder or a hydraulic cylinder.

4. The back-pull anti-deformation welding fixture for electron beam processing according to claim 1, characterized in that: The corresponding part of the pull rod (2) is in sliding and sealed contact with the electron beam welding machine drive spindle through multiple O-ring rubber seals.

5. A pull-back anti-deformation welding fixture for electron beam processing according to claim 1, characterized in that: The pressure cap (5) has multiple inner holes distributed inside, and each inner hole corresponds to a welding position.

Images