CN217965260U

CN217965260U - Preheating and slow-cooling device for vacuum electron beam welding non-contact infrared workpiece

Info

Publication number: CN217965260U
Application number: CN202222079561.8U
Authority: CN
Inventors: 刘超; 朱少旺; 刘飞; 潘华南
Original assignee: Zhejiang Bingpeng Automation Technology Co ltd
Current assignee: Zhejiang Bingpeng Automation Technology Co ltd
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2022-12-06
Anticipated expiration: 2032-08-08

Abstract

The utility model relates to a vacuum electron beam welding technical field relates to a vacuum electron beam welding non-contact infrared ray work piece preheats slow cooling device, the utility model discloses a: the heating device and the lifting mechanism are arranged in the vacuum chamber, a gun head of the electron gun is arranged in the vacuum chamber, the heating device comprises an infrared heating lamp tube and a lampshade, the infrared heating lamp tube is arranged in the lampshade, a protective layer is arranged at the upper half part of the infrared heating lamp tube, a through hole for an electron beam of the electron gun to pass through is formed in the top of the lampshade, the electron gun is arranged above the lampshade, and the lifting mechanism is connected with the top of the lampshade through a first connecting plate, so that heating can be completed and welding can be immediately completed, and the phenomenon that a preheating effect is not reached due to the fact that a workpiece is cooled because of operation of an auxiliary process is avoided; heating and vacuumizing are carried out simultaneously, so that the production takt can be shortened, after welding, heating and slow cooling can be carried out immediately, and joint failure or scrapping caused by cracking of a workpiece due to fast cooling is avoided.

Description

Preheating and slow-cooling device for vacuum electron beam welding non-contact infrared workpiece

Technical Field

The utility model relates to a vacuum electron beam welding technical field relates to a vacuum electron beam welding non-contact infrared ray work piece preheats slow cooling device.

Background

The welding preheating can slow down the cooling speed after welding, can reduce the hardening degree of a welding line and a heat affected zone, improves the crack resistance of a welding joint, can reduce welding stress by preheating, can uniformly and locally preheat or wholly preheat, can reduce the temperature difference between a welding area and a welded workpiece, reduces the welding stress on one hand, reduces the welding strain rate on the other hand, is beneficial to avoiding the generation of welding cracks, can reduce the restraint degree of a welding structure by preheating, and reduces the crack occurrence rate along with the improvement of the preheating temperature.

The traditional heating scheme of electron beam welding adopts external heating, and the specific methods comprise the following steps: furnace heating, flame heating, induction heating, infrared heating, and the like. The prior art has the problems and disadvantages that the temperature of the preheated workpiece is higher, which is not favorable for operation; after preheating, auxiliary processes such as workpiece assembly, vacuumizing and welding seam programming are needed before welding, the time of the auxiliary processes is different from 20 minutes to 60 minutes, after long-time cooling, the temperature of the workpiece is obviously reduced, and the phenomenon is more prominent due to lower environmental temperature in winter, so that the traditional preheating scheme does not completely meet the requirement of welding preheating, and the traditional heating scheme is outside a vacuum cavity and cannot immediately implement a slow cooling process of the workpiece after welding.

Therefore, in order to solve the defects in the prior art, a preheating and slow-cooling device for vacuum electron beam welding non-contact infrared workpieces needs to be designed to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a preheating and slow cooling device for vacuum electron beam welding non-contact infrared workpieces, which solves the problems of the prior art.

The purpose of the utility model can be realized by the following technical proposal: a preheating and slow-cooling device for vacuum electron beam welding non-contact infrared workpieces comprises: the electron gun comprises an electron gun body, a heating device and a lifting mechanism, wherein the heating device and the lifting mechanism are arranged in a vacuum chamber, a gun head of the electron gun body is arranged in the vacuum chamber, the heating device comprises an infrared heating lamp tube and a lampshade, the infrared heating lamp tube is arranged inside the lampshade, a protective layer is arranged on the upper half part of the infrared heating lamp tube, a through hole for an electron beam of the electron gun to pass through is formed in the top of the lampshade, the electron gun body is arranged above the lampshade, and the lifting mechanism is connected with the top of the lampshade through a first connecting plate.

The lifting mechanism comprises an upper connecting plate, a lower connecting plate, a guide rod and a screw rod, the lower connecting plate is fixedly connected with the first connecting plate, an upper guide sleeve is fixed at the upper end of the guide rod and fixed on the upper connecting plate, a lower guide sleeve is slidably sleeved outside the lower end of the guide rod and fixed on the lower connecting plate, a bearing seat is connected to the upper end of the screw rod and fixed on the upper connecting plate, a ball screw nut is connected to the lower end of the screw rod and fixed on the lower connecting plate, and a driving mechanism is connected to the bottom of the screw rod.

The improved lamp is characterized in that a cushion block is fixed inside the lamp shade, a single-side pipe clamp is fixed on the cushion block, and the infrared heating lamp tube is arranged in a groove of the single-side pipe clamp.

In a further improvement, the guide rods are symmetrically arranged in two groups relative to the screw rod.

In a further improvement, the protective layer is a high-temperature heat insulation coating.

Compared with the prior art, the utility model discloses vacuum electron beam welding non-contact infrared ray work piece preheats slow cooling device's beneficial effect:

the welding machine can realize heating and immediate welding, and avoid the phenomenon that the workpiece is cooled due to the operation of an auxiliary process so as not to reach the effect of preheating; the heating and the vacuumizing are carried out simultaneously, so that the production beat can be shortened; after welding, the workpiece can be heated and slowly cooled immediately, so that joint failure or scrapping caused by cracking of the workpiece due to rapid cooling is avoided; by adopting a radiation heating method, the heat transfer efficiency is high, and the loss is small; the non-contact heating is adopted, the heating distance is adjustable, the welding device is suitable for various structural forms, and the position change of a workpiece in the welding process is not influenced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention

Fig. 2 is a schematic structural view of the middle lifting mechanism of the present invention

FIG. 3 is a schematic view of the structure of the heating device of the present invention

FIG. 4 is a schematic view of the structure of the infrared heating lamp tube of the present invention

In the figure, 1-an electron gun, 2-a heating device, 21-an infrared heating lamp tube, 22-a lamp shade, 221-a through hole, 23-a protective layer, 24-a cushion block, 25-a single-side pipe clamp, 26-a groove, 3-a lifting mechanism, 31-an upper connecting plate, 32-a lower connecting plate, 33-a guide rod, 34-a screw rod, 35-an upper guide sleeve, 36-a lower guide sleeve, 37-a bearing seat, 38-a ball screw nut, 39-a driving mechanism, 4-a connecting plate I, and 5-a vacuum chamber.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

The technical solution of the present invention will be further explained with reference to the following embodiments and accompanying drawings 1 to 4.

Example 1

A preheating and slow-cooling device for a vacuum electron beam welding non-contact infrared workpiece comprises: electron gun 1, heating device 2 and elevating system 3 set up in real empty room 5, the rifle head of electron gun 1 sets up in real empty room 5, heating device 2 includes infrared heating fluorescent tube 21 and lamp shade 22, infrared heating fluorescent tube 21 sets up inside lamp shade 22, the first half of infrared heating fluorescent tube 21 is provided with inoxidizing coating 23, lamp shade 22 top is equipped with the through-hole 221 that supplies electron gun 1 electron beam to pass through, electron gun 1 sets up in lamp shade 22 top, elevating system 3 passes through connecting plate 4 and connects lamp shade 22 top. The lifting mechanism 3 comprises an upper connecting plate 31, a lower connecting plate 32, a guide rod 33 and a screw rod 34, the lower connecting plate 32 is fixedly connected with a first connecting plate 4, an upper guide sleeve 35 is fixed at the upper end of the guide rod 33, the upper guide sleeve 35 is fixed on the upper connecting plate 31, a lower guide sleeve 36 is sleeved outside the lower end of the guide rod 33 in a sliding mode, the lower guide sleeve 36 is fixed on the lower connecting plate 32, a bearing seat 37 is connected at the upper end of the screw rod 34, the bearing seat 37 is fixed on the upper connecting plate 31, a ball screw nut 38 is connected at the lower end of the screw rod 34, the ball screw nut 38 is fixed on the lower connecting plate 32, and a driving mechanism 39 is connected at the bottom of the screw rod 34.

The electron gun 1 is half outside the vacuum chamber 5 and half inside the vacuum chamber 5; the electron gun has a separate vacuum pumping system, and the connection part between the electron gun and the vacuum chamber is sealed.

As shown in fig. 1 to 4, the upper half of the infrared heating lamp 21 is coated with a protective layer 23, the protective layer 23 ensures that the light of the infrared heating lamp 21 is irradiated downwards to avoid upward irradiation of the light, the lampshade 22 covers the upper side of the infrared heating lamp 21 to prevent the infrared rays of the infrared heating lamp 21 from irradiating the region outside the workpiece, the through hole 221 in the central region of the lampshade 22 ensures that the electron beam can reach the weld zone, and the heating device 2 is height-adjustable by the lifting mechanism 3 to ensure that the heating device 2 does not interfere with the workpiece and can freely adjust the heating height.

The utility model discloses an application principle: after the height of the workpiece is confirmed, the lifting mechanism 3 is adjusted to adjust the height of the heating device 2, specifically, the driving mechanism 39 drives the screw rod 34 to rotate, the driving mechanism 39 can be driven by a motor or adjusted manually, then the ball screw nut 38 drives the lower connecting plate 32 to move upwards, further the heating device 2 is driven to move through the first connecting plate 4, and the guide rod 33 is arranged to ensure that the lower connecting plate 32 and the lower guide sleeve 36 move upwards together, so that the moving stability is improved; and then, the workpiece is conveyed into a vacuum chamber and then is vacuumized, meanwhile, the heating device 2 is started to preheat the workpiece, the heating device 2 is closed after preheating is completed, welding is carried out through the electron gun 1, and finally, the heating device 2 is started again after welding is completed to slowly cool the workpiece.

Compared with the traditional heating scheme outside the vacuum chamber, the invention has the following advantages:

1. the welding machine can realize heating and immediate welding, and avoid the phenomenon that the workpiece is cooled due to the operation of an auxiliary process so as not to reach the effect of preheating;

2. the heating and the vacuumizing are carried out simultaneously, so that the production beat can be shortened;

3. after welding, the workpiece can be heated and slowly cooled immediately, so that joint failure or scrapping caused by cracking of the workpiece due to rapid cooling is avoided;

4. realize the clamping at normal atmospheric temperature, reduce the transport and the clamping degree of difficulty, avoid causing the scald accident.

5. The scheme adopts a radiation heating method, so that the heat transfer efficiency is high, and the loss is small;

6. this scheme adopts non-contact heating, and the heating distance is adjustable, and applicable in multiple structural style, and do not influence the work piece position transform among the welding process.

As a further embodiment, a cushion block 24 is fixed inside the lamp housing 22, a single-sided pipe clamp 25 is fixed on the cushion block 24, and the infrared heating lamp 21 is disposed in a groove 26 of the single-sided pipe clamp 25. As shown in fig. 3, the infrared heating lamp tube 21 is conveniently installed by a one-sided tube clamp 25.

As a further embodiment, the guide rods 33 are symmetrically arranged in two groups with respect to the screw rod 34. The lifting smoothness is improved by two groups of guide rods 33.

As a further embodiment, the protective layer 23 is a high-temperature thermal insulation coating made of a high-temperature thermal insulation material.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a vacuum electron beam welding non-contact infrared ray work piece preheats slow cooling device which characterized in that includes: the electron gun comprises an electron gun body, a heating device and a lifting mechanism, wherein the heating device and the lifting mechanism are arranged in a vacuum chamber, a gun head of the electron gun body is arranged in the vacuum chamber, the heating device comprises an infrared heating lamp tube and a lampshade, the infrared heating lamp tube is arranged inside the lampshade, a protective layer is arranged on the upper half part of the infrared heating lamp tube, a through hole for an electron beam of the electron gun to pass through is formed in the top of the lampshade, the electron gun body is arranged above the lampshade, and the lifting mechanism is connected with the top of the lampshade through a first connecting plate.

2. The preheating and slow cooling device for the vacuum electron beam welding non-contact infrared workpiece as claimed in claim 1, wherein the lifting mechanism comprises an upper connecting plate, a lower connecting plate, a guide rod and a screw rod, the lower connecting plate is fixedly connected with the first connecting plate, an upper guide sleeve is fixed at the upper end of the guide rod and fixed on the upper connecting plate, a lower guide sleeve is slidably sleeved outside the lower end of the guide rod and fixed on the lower connecting plate, a bearing seat is connected at the upper end of the screw rod and fixed on the upper connecting plate, a ball screw nut is connected at the lower end of the screw rod and fixed on the lower connecting plate, and a driving mechanism is connected at the bottom of the screw rod.

3. The preheating and slow-cooling device for the vacuum electron beam welding non-contact infrared workpiece as claimed in claim 1, wherein a cushion block is fixed inside the lampshade, a single-side pipe clamp is fixed on the cushion block, and the infrared heating lamp tube is arranged in a groove of the single-side pipe clamp.

4. The preheating and slow-cooling device for the vacuum electron beam welding non-contact infrared workpiece as claimed in claim 2, wherein the guide rods are symmetrically arranged in two groups about the screw rod.

5. The preheating and slow-cooling device for the vacuum electron beam welding non-contact infrared workpiece as claimed in claim 1, wherein the protective layer is a high-temperature thermal insulation coating.