CN-121976201-A - Blackening treatment method for weld joint of semiconductor aluminum welding

CN121976201ACN 121976201 ACN121976201 ACN 121976201ACN-121976201-A

Abstract

The application discloses a method for blackening a welding seam of semiconductor aluminum welding, and aims to solve the defect that single acid washing and alkali washing of the welding seam of the semiconductor aluminum welding are easy to cause welding seam chromatic aberration. The method comprises the following steps of S1, immersing a product in alkali liquor for alkali washing to enable black precipitation on the surface of a welding seam of the product, S2, cleaning the surface of the product by pure water to remove impurities on the surface of the welding seam, S3, polishing the surface of the welding seam to remove black residues, cleaning by pure water and drying, S4, immersing the product in acid liquor for pickling, cleaning by pure water and drying after drying, S5, observing the surface of the welding seam, and repeating S1 to S4 until the black impurities on the surface of the welding seam are completely removed if the black impurities exist. The method for blackening the weld joint of the semiconductor aluminum welding can thoroughly solve the problem of blackening the weld joint of the aluminum welding, remove impurities such as oxide films on the surface of the weld joint, mixture accumulation on the surface of the weld joint, greasy dirt and the like, ensure that the appearance of the weld joint of the aluminum alloy is exposed out of the natural color of the aluminum alloy, and ensure the quality of the weld joint of the product.

Inventors

WANG YU
LIU JIAXIN
Li tianpu
JIN HONGXIN
XIE RUYING

Assignees

杭州大和热磁电子有限公司

Dates

Publication Date: 20260505
Application Date: 20251027

Claims (10)

1. A blackening treatment method for a welding line of semiconductor aluminum welding is characterized by comprising the following steps of S1, immersing a product in alkali liquor for alkali washing to enable black precipitation on the surface of the welding line of the product, S2, cleaning the surface of the product by pure water to remove impurities on the surface of the welding line, S3, polishing the surface of the welding line to remove black residues, cleaning by pure water and drying, S4, immersing the product in acid liquor for pickling, drying, cleaning by pure water and drying, S5, observing the surface of the welding line, and repeating S1 to S4 until the black impurities on the surface of the welding line are completely removed.
2. The method for blackening the weld seam of the semiconductor aluminum welding, which is disclosed in claim 1, is characterized in that the S1 product is immersed in alkali liquor for 5-20min, and the S4 product is immersed in acid liquor for 30-60S.
3. The method for blackening the weld joint of the semiconductor aluminum welding according to claim 1, wherein S3 polishes the surface of the weld joint by using a steel brush.
4. The method for blackening welded joints of semiconductor aluminum welding according to claim 1, wherein in the step S1, alkali liquor is prepared first, sodium hydroxide and pure water are mixed in proportion, water is added and stirred, and the PH value of the alkali liquor is measured to meet the cleaning requirement.
5. The method for blackening a weld joint of a semiconductor aluminum welding according to claim 1, wherein the step S2 is to wash the surface of the product with pure water, then to clean the surface of the product while wiping, and then to wash the surface of the product and blow-dry the product.
6. The method for blackening welded seam of semiconductor aluminum according to claim 5, wherein the product is loaded into a scrubbing rotary drum, the scrubbing rotary drum is arranged in a rotating mode while being cleaned, a scrubbing cloth pad is paved on the inner wall of the scrubbing rotary drum, a lifting seat is arranged above the scrubbing rotary drum, a connecting seat which moves up and down is connected to the lifting seat, a plurality of scrubbing columns which move up and down are arranged on the connecting seat, a buffer spring is arranged between the scrubbing columns and the connecting seat, and a scrubbing cloth sleeve is sleeved on the outer wall of the scrubbing column.
7. The method for blackening the welding seam of the semiconductor aluminum welding, which is disclosed in claim 1, is characterized in that alkali washing and acid washing are carried out in a washing tank, a lifting basket is arranged in the washing tank, a washing basket is arranged in the lifting basket, a product is loaded in the washing basket, the edge of the washing basket is connected with the lifting basket through a plurality of connecting springs, a push-pull mechanism is arranged on the washing tank and comprises a push-pull plate and a push-pull rod, the push-pull plate is arranged in a reciprocating manner, a plug-in groove is arranged on the push-pull plate, the push-pull rod is movably plugged in the plug-in groove, and the push-pull rod is fixedly connected with the lifting basket.
8. The method for blackening welded seam of semiconductor aluminum according to claim 7, wherein the support and a turntable driven by a push-pull motor are installed on the cleaning tank, a connecting rod is hinged between the turntable and a push-pull plate, and the push-pull plate is in sliding connection with the support.
9. The method for blackening a weld joint of a semiconductor aluminum welding according to claim 7, wherein the insertion groove is elongated, and a length direction of the insertion groove is perpendicular to a moving direction of the push-pull plate.
10. The method for blackening welded seams of semiconductor aluminum welding according to any one of claims 1 to 9, wherein pure water washing and drying of a product are performed in a washing and drying pool, a washing and drying basket, a plurality of air blowing pipes and shower pipes are arranged in the washing and drying pool, the edges of the washing and drying basket are connected with the washing and drying pool through a plurality of connecting springs, a push-pull mechanism is arranged on the washing and drying pool and comprises a push-pull plate and a push-pull rod, the push-pull plate is arranged in a reciprocating manner, a plug-in groove is formed in the push-pull plate, the push-pull rod is movably plugged with the plug-in groove, the push-pull rod is fixedly connected with the washing and drying basket, and the air blowing pipes and the shower pipes blow and flush water towards the washing and drying basket.

Description

Blackening treatment method for weld joint of semiconductor aluminum welding Technical Field The invention relates to the technical field of semiconductor processing, in particular to a method for blackening weld joints of semiconductor aluminum welding. Background Aluminum and aluminum alloys have a significant role in various materials used in modern engineering, and at present, conventional aluminum alloy products are various, and different types of aluminum alloys have different welding performances, so that proper welding materials need to be selected. The base metal and the welding material are distinguished in composition, weld joint color difference (blackening condition) occurs after single acid washing and alkali washing, refractory oxide films are easy to form on the surface of the aluminum alloy, slag inclusion and other defects occur, weld joint color difference (blackening) occurs after single acid washing and alkali washing, weld joint forming is uneven and smooth at welding positions of different structures of the aluminum alloy, weld joint width is inconsistent, and weld joint color difference occurs at uneven included angles after single acid washing and alkali washing. Chinese patent application number 2022117383871 discloses a welding method of a semiconductor aluminum alloy cavity, which is characterized in that after a product to be welded is unsealed, the product is communicated with a switch for welding, energized gas is filled, welding wire filling is continuously carried out in the welding process, the welding wire and a base metal are different in composition, and welding seam chromatic aberration easily occurs after single acid washing and alkali washing. Disclosure of Invention In order to overcome the defects, the invention provides a weld blackening treatment method for semiconductor aluminum welding, which can thoroughly solve the problem of weld blackening of aluminum welding, remove impurities such as weld oxide films, weld mixture accumulation, greasy dirt and the like, ensure the appearance of an aluminum alloy weld and ensure the weld quality of products. The technical scheme is that the method for blackening the welding seam of the semiconductor aluminum welding comprises the following steps of S1, immersing a product in alkali liquor for alkali washing to enable black on the surface of the welding seam of the product to be separated out, S2, cleaning the surface of the product by pure water to remove impurities on the surface of the welding seam, S3, polishing the surface of the welding seam to remove black residues, cleaning by pure water and drying, S4, immersing the product in acid liquor for pickling, drying in the air, cleaning by pure water and drying, S5, observing the surface of the welding seam, and repeating S1 to S4 until the black impurities on the surface of the welding seam are completely removed. The product is immersed in the alkali liquor, and the alkali liquor is used for cleaning the surface of the welded seam, so that the black color on the surface of the welded seam can be separated out, and the appearance of the surface of the welded seam is ensured. And then cleaning with pure water to remove the residue on the surface of the product. After the surface of the product is dried, polishing the surface of the weld joint, removing black residues on the surface weld joint lines, ensuring that the natural color of the aluminum alloy is exposed, visually avoiding black impurities, cleaning with pure water and drying. And then the product is pickled, an oxide layer and residual impurities on the surface of the welding line are removed, and the black impurities on the surface of the welding line are completely removed, so that the blackening treatment of the welding line of the product is completed, and the quality of the product is ensured. The method for blackening the weld joint of the semiconductor aluminum welding can thoroughly solve the problem of blackening the weld joint of the aluminum welding, remove impurities such as oxide films on the surface of the weld joint, mixture accumulation on the surface of the weld joint, greasy dirt and the like, ensure that the appearance of the weld joint of the aluminum alloy is exposed out of the natural color of the aluminum alloy, and ensure the quality of the weld joint of the product. Preferably, the S1 product is immersed in the alkali liquor for 5-20min, and the S4 product is immersed in the acid liquor for 30-60S. The immersing time in the alkaline washing and acid washing processes of the product is reasonably controlled, and the effects of alkaline washing and acid washing are ensured. Preferably, S3 adopts a steel brush to polish the surface of the welding line. The steel brush polishes the surface of the welding line, and the cleaning effect of surface impurities is good. Preferably, in the step S1, firstly, alkali liquor is prepared, sodium hydroxide and pure water are mixed in proportion, water is