Diffusion welding machine

Abstract

The utility model discloses a diffusion welding machine, and relates to the technical field of high-temperature molecular diffusion welding. The lower electrode plate is connected to a first pole of a power supply; the lower conducting layer is arranged on the lower electrode plate; the upper electrode plate is connected to a second pole of the power supply; the upper conductive layer is arranged at the bottom of the upper electrode plate; the driving part is used for driving the upper conducting layer to press or loosen the to-be-machined part, and after the upper conducting layer makes contact with the lower conducting layer, an electric loop is formed among the upper electrode plate, the to-be-machined part and the lower electrode plate; the grating main scale is arranged on one side of the workpiece to be machined; the reading head is connected to the output end of the driving piece, and the reading head is matched with the grating main ruler so as to detect the displacement value of the upper conducting layer when the upper conducting layer is pressed on the to-be-machined piece; and the control unit is used for controlling the driving piece to press down or lift up according to the displacement value detected by the reading head. The objective of the utility model is to avoid the problems of large temperature detection result deviation and low test result repeatability caused by infrared temperature measurement.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature molecular diffusion welding technology, and in particular to a diffusion welding machine. Background Technology

[0002] Diffusion welding machines, as important welding equipment, are widely used in the manufacture of conductive strip flexible connectors and double- or multi-layer metal products. Compared with traditional welding methods, diffusion welding technology has higher efficiency and better welding quality, and is especially suitable for welding dissimilar joints and materials. Its basic principle is to use the high temperature generated by electric current and the pressure to cause atomic-level diffusion on the surface of the weldment, thereby achieving a strong connection.

[0003] In diffusion welding, temperature measurement and control become critical factors for weld quality due to the high temperatures and complex environment. Traditionally, infrared thermometers have been widely used for temperature monitoring during the welding process. Infrared thermometers calculate temperature by measuring the radiation intensity of an object's surface, offering advantages such as speed and non-contact operation. However, the accuracy of infrared thermometers is affected by various factors during the welding process.

[0004] Different objects, or even the same object, exhibit significant changes in emissivity during temperature variations. For example, when the temperature rises from room temperature to 950°C, the emissivity of an object changes markedly, with even more pronounced differences between different materials. This can lead to deviations in the measurement results of infrared thermometers, affecting the accuracy of temperature monitoring.

[0005] Therefore, how to avoid large deviations in temperature detection results and low repeatability of test results caused by infrared thermometry has become an urgent technical problem to be solved. Utility Model Content

[0006] The main purpose of this invention is to provide a diffusion welding machine that avoids the problems of large deviations in temperature detection results and low repeatability of test results caused by infrared thermometry.

[0007] To achieve the above objectives, this utility model proposes a diffusion welding machine, comprising:

[0008] The lower electrode plate is connected to the first terminal of the power supply;

[0009] A lower conductive layer is disposed on the lower electrode plate to support the workpiece to be processed and to enable an electrical connection between the workpiece to be processed placed on the lower conductive layer and the lower electrode plate.

[0010] The upper electrode plate is connected to the second terminal of the power supply;

[0011] An upper conductive layer is disposed at the bottom of the upper electrode plate;

[0012] A driving component is used to drive the upper conductive layer to press or release the workpiece to be processed. When the upper conductive layer and the lower conductive layer come into contact, an electrical circuit is formed between the upper electrode plate, the workpiece to be processed, and the lower electrode plate to heat the workpiece to be processed.

[0013] The grating main scale is located on one side of the workpiece to be processed;

[0014] A reading head, connected to the output end of the drive unit, moves synchronously with the upper electrode plate. The reading head cooperates with the grating main scale to detect the displacement value of the upper conductive layer when it is pressed onto the workpiece; and

[0015] The control unit controls the drive component to press down or lift up based on the displacement value detected by the reading head.

[0016] In one embodiment of this application, the lower conductive layer and / or the upper conductive layer is a graphite layer.

[0017] In one embodiment of this application, the driving component is a lifting cylinder.

[0018] By adopting the above technical solution, since the reading head can detect the displacement state of the upper electrode plate in real time, and in conjunction with the characteristic that the compressive strength of the workpiece gradually decreases as the temperature rises during diffusion welding of the upper electrode plate and the workpiece, the state of the workpiece can be detected in real time without the need to use an infrared thermometer to measure the temperature, thus avoiding the problems of large deviation in temperature detection results and low repeatability of test results caused by infrared thermometry. Attached Figure Description

[0019] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0021] 10. Lower electrode plate; 11. Lower conductive layer; 20. Upper electrode plate; 21. Upper conductive layer; 30. Drive unit; 40. Frame. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain this utility model and do not constitute a limitation on this utility model.

[0023] like Figure 1 As shown, in order to achieve the above objectives, this utility model proposes a diffusion welding machine, comprising:

[0024] The lower electrode plate 10 is connected to the first terminal of the power supply;

[0025] The lower conductive layer 11 is disposed on the lower electrode plate 10 and is used to support the workpiece to be processed and to enable an electrical connection between the workpiece to be processed placed on the lower conductive layer 11 and the lower electrode plate 10.

[0026] The upper electrode plate 20 is connected to the second terminal of the power supply;

[0027] An upper conductive layer 21 is disposed at the bottom of the upper electrode plate 20;

[0028] The driving component 30 is used to drive the upper conductive layer 21 to press or release the workpiece to be processed. When the upper conductive layer 21 and the lower conductive layer 11 come into contact, an electrical circuit is formed between the upper electrode plate 20, the workpiece to be processed, and the lower electrode plate 10 to heat the workpiece to be processed.

[0029] The grating main scale is located on one side of the workpiece to be processed;

[0030] The reading head is connected to the output end of the drive unit 30 and can move synchronously with the upper electrode plate 20. The reading head cooperates with the grating main scale to detect the displacement value of the upper conductive layer when the upper conductive layer is pressed onto the workpiece.

[0031] The control unit controls the drive unit 30 to press down or lift up based on the displacement value detected by the reading head.

[0032] Specifically, the diffusion welding machine includes a lower electrode plate 10, which is fixedly mounted on the frame 40 by fasteners and connected to the first terminal of the power supply via wires. A lower conductive layer 11 is made of a conductive material, which can be pre-oxidized graphite. When pre-oxidized graphite is used, it is fixedly mounted on the lower electrode plate 10 by fasteners to provide a uniform conductive contact surface, enabling the workpiece placed on the lower conductive layer 11 to stably form an electrical connection with the lower electrode plate 10.

[0033] The upper electrode plate 20 is made of conductive material and is connected to the frame 40 via a support mechanism. It is also connected to the second terminal of the power supply via a wire to ensure that a current path is formed between it and the lower electrode plate 10 during operation. An upper conductive layer 21 is fixed to the bottom of the upper electrode plate 20, and the material of the upper conductive layer 21 is the same as that of the lower conductive layer 11.

[0034] The driving component 30 includes a hydraulic cylinder or a pneumatic cylinder. The output end of the driving component 30 is connected to the upper electrode plate 20 to drive the upper electrode plate 20 to move vertically under the command of the control unit, thereby controlling the pressure state of the upper conductive layer 21 on the workpiece to be processed. When the driving component 30 drives the upper electrode plate 20 to press down until the upper conductive layer 21 contacts the workpiece to be processed, the upper electrode plate 20, the workpiece to be processed, and the lower electrode plate 10 form a closed circuit. The workpiece to be processed is heated under the action of current, thereby realizing diffusion welding.

[0035] The grating master scale is mounted on one side of the workpiece and remains stationary. A reading head is mounted on the output end of the drive unit 30 and moves synchronously with the upper electrode plate 20. The detection signal from the reading head is transmitted to the control unit via a data line. Based on the displacement data provided by the reading head, the control unit adjusts the movement of the drive unit 30 in real time to ensure that the upper conductive layer 21 applies stable pressure to the workpiece. After welding is completed, the control unit controls the drive unit 30 to lift the upper electrode plate 20, putting the diffusion welding machine into standby mode. It is conceivable that after welding, when controlling the lifting of the drive unit 30, the control unit could first perform a predetermined voltage stabilization period, and then lift it after the predetermined period, thereby improving the welding effect.

[0036] By adopting the above technical solution, since the reading head can detect the displacement state of the upper electrode plate 20 in real time, and in conjunction with the characteristic that the compressive strength of the workpiece gradually decreases as the temperature rises during diffusion welding of the upper electrode plate 20 and the workpiece to be processed, the state of the workpiece to be processed can be detected in real time without the need to use an infrared thermometer to measure the temperature, thus avoiding the problem of large deviation in temperature detection results and low repeatability of test results caused by infrared thermometry.

[0037] In one embodiment of this application, the lower conductive layer 11 and / or the upper conductive layer 21 are graphite layers.

[0038] Specifically, the lower conductive layer 11 is a graphite layer, which is fixed to the surface of the lower electrode plate 10 by physical clamping. In this application, the physical clamping is achieved by a first clamping cylinder and a second clamping cylinder. The fixed part of the first clamping cylinder is connected to the lower electrode plate, and the fixed part of the second clamping cylinder is also connected to the lower electrode plate. The first and second clamping cylinders are arranged opposite to each other, and a clamping space for clamping the graphite layer is formed between the movable parts of the first and second clamping cylinders. The movable parts of the first and second clamping cylinders can move closer or further apart to achieve clamping of the graphite layer.

[0039] The graphite layer has good electrical conductivity and high temperature resistance, which enables the workpiece to be processed to form a stable electrical connection with the lower electrode plate 10 after being placed on the lower conductive layer 11, and reduces the electrical contact resistance and improves the heating uniformity.

[0040] The upper conductive layer 21 is also a graphite layer, and is firmly connected to the upper electrode plate 20 by physical clamping. The upper conductive layer 21 and the lower conductive layer 11 are made of the same material, allowing the workpiece to be heated uniformly under clamping conditions, while avoiding resistance changes caused by contact between different materials, thus improving welding stability. It is conceivable that the upper conductive layer 21 and the lower conductive layer 11 could also be made of different materials to create a temperature difference between them, accommodating welding of dissimilar materials.

[0041] By adopting the above technical solution, both the lower conductive layer 11 and the upper conductive layer 21 are made of graphite, enabling the diffusion welding machine to maintain stable conductivity in high-temperature environments. Simultaneously, the high heat resistance and oxidation resistance of the graphite layer effectively reduce material loss during the welding process and extend the equipment's service life. Furthermore, due to the good embedding properties of the graphite layer surface, damage to the workpiece during pressure application can be reduced, improving the reliability of the welding effect.

[0042] In one embodiment of this application, the driving component 30 is a lifting cylinder.

[0043] Specifically, the driving component 30 is a lifting cylinder, the cylinder body of which is fixed on the frame 40, and the piston rod is connected to the upper electrode plate 20. The control unit controls the extension and retraction of the lifting cylinder by adjusting the air source pressure, thereby driving the upper electrode plate 20 to move vertically, causing the upper conductive layer 21 to press or release the workpiece. When the lifting cylinder drives the upper electrode plate 20 down until the upper conductive layer 21 contacts the workpiece, and the workpiece is placed on the lower conductive layer 11, the upper electrode plate 20, the workpiece, and the lower electrode plate 10 form a closed circuit. The workpiece is heated under the action of current, thereby achieving diffusion welding.

[0044] Using the above technical solution, the driving component 30 employs a lifting cylinder. By adjusting the air source pressure, precise control of the upper electrode plate 20 can be achieved, ensuring the pressure stability of the upper conductive layer 21 on the workpiece during the welding process. Because the cylinder-driven method offers fast response, simple structure, and ease of maintenance, the diffusion welding machine exhibits high reliability in practical applications.

[0045] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A diffusion welding machine, characterized in that, include: The lower electrode plate is connected to the first terminal of the power supply; A lower conductive layer is disposed on the lower electrode plate to support the workpiece to be processed and to enable an electrical connection between the workpiece to be processed placed on the lower conductive layer and the lower electrode plate. The upper electrode plate is connected to the second terminal of the power supply; An upper conductive layer is disposed at the bottom of the upper electrode plate; A driving component is used to drive the upper conductive layer to press or release the workpiece to be processed. When the upper conductive layer and the lower conductive layer come into contact, an electrical circuit is formed between the upper electrode plate, the workpiece to be processed, and the lower electrode plate to heat the workpiece to be processed. The grating main scale is located on one side of the workpiece to be processed; A reading head is connected to the output end of the drive unit and can move synchronously with the upper electrode plate. The reading head cooperates with the grating main scale to detect the displacement value of the upper conductive layer when the upper conductive layer is pressed onto the workpiece. as well as The control unit controls the drive component to press down or lift up based on the displacement value detected by the reading head.

2. The diffusion welding machine as described in claim 1, characterized in that, The lower conductive layer and / or the upper conductive layer are graphite layers.

3. The diffusion welding machine as described in claim 1, characterized in that, The driving component is a lifting cylinder.

Images