Method for improving wire breakage wire color difference

Abstract

The application discloses a method for improving color difference of broken welding wire, which comprises the following steps: (1) manually cutting off the wire head on both sides of the broken wire position and straightening; (2) attaching the electric welder to the left side or the right side door position of the slicing machine, and welding the welding point; (3) checking the appearance of the welding point, and breaking the welding point; (4) manually pulling the steel wire through the rotation of the guide wheel to form a tension difference between the steel wire and the wire net, and then starting to adopt bidirectional wire winding after the welded wire is collected into the guide wheel to form a complete wire net; (5) modifying the normal cutting process of the slicing machine; (6) calculating the passing length of the welding point and recording the value; (7) starting the slicing machine, and through the acceleration button, the wire speed is increased from 8% to 100% within 15-20 seconds, then the counting length of the panel is used to confirm whether the welding wire has run to the wire wheel, and the normal process cutting is switched immediately after the welding point arrives; the application reduces the color difference of the welding wire, improves the wire running speed and shortens the running time of the welding point.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic cutting technology, and in particular to a method for improving color difference in broken wire bonding. Background Technology

[0002] With the development of multi-wire cutting technology for photovoltaic silicon wafers, the gradual refinement of wire diameter and the use of diamond wire in multi-wire cutting, and the continuous rise in silicon material prices, wire breakage accidents inevitably occur during the processing of slicing machines. Wire breakage accidents will significantly increase the scrap rate of silicon wafer cutting and increase production costs. Therefore, rescue operations are usually carried out to reduce losses in the process of silicon wafer processing. Thus, the loss caused by wire breakage and the color difference caused by wire bonding are particularly important for the recovery of finished products.

[0003] Current salvage methods typically involve wire bonding. After soldering, the wire is manually pulled to feel the joint, and then the wire is wound in one direction. The joint is then run across the wire mesh at a speed of 5 m / s while the workbench is stationary before the machine is restarted. However, due to the material and wire diameter, the solder joint is prone to breakage under current technology. Therefore, the process involves running the wire across the joint at a low speed before restarting the machine. Prolonged friction at the same depth on the silicon rod leads to color differences, resulting in unsatisfactory salvage effects and excessively long processing times, which is detrimental to production. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide a method for improving the color difference of broken solder wires, thereby solving the problems existing in the background art.

[0005] Technical solution: The present invention provides a method for improving color difference in broken solder wires, comprising the following steps:

[0006] (1) Manually cut off and straighten the ends of the wire on both sides of the broken point;

[0007] (2) Place the welding machine close to the left or right side door of the slicer so that the welding position is horizontal with the broken wire position and weld the weld point;

[0008] (3) After the welding is completed, the weld is smooth without bulges or depressions. Hang a 500G weight on the steel line so that the weld is located at 1 / 2 of the steel line. Manually lift it in a V shape and shake it up and down to perform a breakage test to determine whether the weld is broken.

[0009] (4) Manually pull the steel wire and use the rotation of the guide wheel to create a tension difference with the steel wire of the wire mesh. After the welded wire is pulled into the guide wheel to form a complete wire mesh, start to take in the wire in both directions. That is, start taking in the wire in the opposite direction to the direction of running the welding point. After taking in the wire for 20-30m, switch to the same direction as running the welding point until the wire is taken in. The wire taking in distance should be controlled within 250m-300m.

[0010] (5) Modify the normal cutting process when the slicer starts up;

[0011] (6) Calculate the length of the weld joint and record the value;

[0012] (7) Turn on the slicer. Within 15 to 20 seconds, use the acceleration button to increase the line speed from 8% to 100%. Then, use the count length on the panel to confirm whether the welding wire has reached the wire wheel. Once the welding point is reached, immediately switch to normal process cutting.

[0013] Furthermore, the take-up distance in step (4) is controlled by the force of pulling the line. Tightening the line results in a longer take-up distance, while loosening it results in a shorter take-up distance. The force can be adjusted on-site according to the taken-up distance.

[0014] Furthermore, step (5) includes the following steps:

[0015] (51) The slicer table speed and linear speed remain unchanged under normal process conditions;

[0016] (52) The line consumption for one round trip of the inlet and return line is controlled within 200m. The inlet line is set according to the current process settings, and the return line setting = inlet line quantity - 200;

[0017] (53) If the solder joint is in the incoming line direction, the incoming line tension is set to 1; if the solder joint is in the return line direction, the return line tension is set to 1.

[0018] Furthermore, in step (6), the running length is equal to the net length multiplied by 7.7m.

[0019] Furthermore, the maximum count length of the panel in step (7) is the running line length in step (6).

[0020] Furthermore, the table speed in step (51) is the descent speed of the workbench, and the line speed is the running speed of the steel wire.

[0021] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: It breaks the traditional process flow, and by establishing solder joint standards and adopting solder joint protection techniques, it enables the solder joint running environment to be close to the cutting environment, thereby reducing color difference. The color difference band width is reduced from 8mm-12mm to less than 1mm, and the solder wire color difference is reduced from 6.5% to 1.2%. The running speed is increased by 7.6 times, and the running time of solder joints is shortened by 10min-15min. Attached Figure Description

[0022] Figure 1 This is a flowchart of the present invention;

[0023] Figure 2 This is a schematic diagram of the weld point location structure of the present invention. Detailed Implementation

[0024] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-2 As shown, the present invention provides a method for improving color difference in broken solder wires, comprising the following steps:

[0026] (1) Manually cut off and straighten the ends of the wire on both sides of the broken point;

[0027] (2) Place the welding machine close to the left or right side door of the slicer so that the welding position is horizontal with the broken wire position and weld the weld point;

[0028] (3) After the welding is completed, the weld is smooth without bulges or depressions. Hang a 500G weight on the steel line so that the weld is located at 1 / 2 of the steel line. Manually lift it in a V shape and shake it up and down to perform a breakage test to determine whether the weld is broken.

[0029] (4) Manually pull the steel wire and use the rotation of the guide wheel to create a tension difference with the steel wire of the wire mesh. After the welded wire is pulled into the guide wheel to form a complete wire mesh, start to take in the wire in both directions. That is, start taking in the wire in the opposite direction to the direction of running the welding point. After taking in the wire for 20-30m, switch to the same direction as running the welding point until the wire is taken in. The wire taking in distance is controlled within 250m-300m. The wire taking in distance is controlled by the force of pulling the wire. Tightening the wire will result in a longer wire taking in distance, and loosening the wire will result in a shorter wire taking in distance. Adjust the force on site according to the wire taking in distance.

[0030] (5) Modify the normal cutting process of the slicer upon startup, including the following steps:

[0031] (51) The table speed and line speed of the slicer remain unchanged during normal operation. The table speed is the descent speed of the worktable, and the line speed is the running speed of the steel wire.

[0032] (52) The line consumption for one round trip of the inlet and return line is controlled within 200m. The inlet line is set according to the current process settings, and the return line setting = inlet line quantity - 200;

[0033] (53) If the solder joint is in the incoming direction, the incoming tension is set to 1; if the solder joint is in the return direction, the return tension is set to 1.

[0034] (6) Calculate the length of the weld joint and record the value. The running length = the wire mesh length x 7.7m;

[0035] (7) Turn on the slicer. Within 15 to 20 seconds, increase the line speed from 8% to 100% by using the acceleration button. Then, check the count length on the panel to see if the welding wire has reached the spool. Once the welding point is reached, immediately switch to normal process cutting. The maximum count length on the panel is the line length in step (6).

Claims

1. A method for improving color difference in broken solder wires, characterized in that, Includes the following steps: (1) Manually cut off and straighten the ends of the wire on both sides of the broken point; (2) Place the welding machine close to the left or right side door of the slicing machine so that the welding position is horizontal with the broken wire position and weld the weld point; (3) After the welding is completed, the weld is smooth without bulges or depressions. Hang a 500G weight on the steel line so that the weld is located at 1 / 2 of the steel line. Manually lift it in a V shape and shake it up and down to perform a breakage test to determine whether the weld is broken. (4) Manually pull the steel wire and use the rotation of the guide wheel to create a tension difference with the steel wire of the wire mesh. After the welded wire is pulled into the guide wheel to form a complete wire mesh, start to take in the wire in both directions. That is, start taking in the wire in the opposite direction to the direction of running the welding point. After taking in the wire for 20-30m, switch to the same direction as running the welding point until the wire is taken in. The wire taking in distance is controlled within 250m-300m. The tension difference is specifically the difference between the force value formed by manually pulling the steel wire and the tension value set by the guide wheel wire mesh. The wire taking in distance is controlled by the force of pulling. Tightening the wire leads to a longer wire taking in distance and loosening the wire leads to a shorter wire taking in distance. The force is adjusted on site according to the wire taking in distance. (5) Modify the normal cutting process of the slicer upon startup; including the following steps: (51) The table speed and line speed of the slicer remain unchanged during normal operation; where table speed is the descent speed of the worktable and line speed is the running speed of the steel wire. (52) The line consumption for one round trip of the inlet and return line is controlled within 200m. The inlet line is set according to the current process settings, and the return line setting is = inlet line quantity - 200; (53) If the solder joint is in the incoming direction, the incoming tension is set to 1; if the solder joint is in the return direction, the return tension is set to 1. (6) Calculate and record the length of the weld joint; where, the running length = wire mesh length x 7.7m (7) Turn on the slicer. Within 15~20 seconds, increase the line speed from 8% to 100% by using the acceleration button. Then, use the count length on the panel to confirm whether the welding line has reached the spool. Once the welding point is reached, immediately switch to normal process cutting. The maximum count length on the panel is the line length in step (6).

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