Any machine is made up of countless parts. As a traditional mechanical equipment, sewing machine is also made up of many parts. The production and processing of sewing machine mainly includes: casing processing and parts assembly, and the assembly level of sewing machine directly determines the technical performance of the machine.

In some ways, the stability, advancement and reliability of sewing machines to a large extent depend on the assembly level of assemblers. Therefore, the assembly level of sewing machine manufacturers also directly affects the quality, reputation and market competitiveness of the enterprises.

Sewing machine assembly

Details determine success or failure

Sewing machine is a mechanical product with complicated design structure. If it is divided according to different requirements, the sewing machine assembly method can be divided into general assembly, group assembly, dual assembly, parts assembly, machine assembly, and debugging (including two parts of "adjustment" and "trial run"). If sewing machine is divided according to different assembly requirements, then sewing machine can be divided into three parts. The assembly of can also be divided into: synchronous, comprehensive, differential and other types of machine assembly.

It should be noted that the assembly of sewing machine not only refers to the assembly in the production process, but also includes the installation and debugging in the repair.

In the production process, the assembly of sewing machine mainly includes six links: 1. Main structure and working principle; 2. Reading of parts catalogue, parts sample and shaft sleeve positioning diagram; 3. Searching of parts drawing number, collecting of parts, quality analysis and defect identification; 4. Assembly and test of the whole machine; 5. Quality analysis of the whole machine; 6. Judgment and maintenance of the whole machine fault.

In the process of sewing machine repair, the assembly process mainly includes: 1. Types and discrimination of common faults in the use of products; 2. Troubleshooting of common faults in the use of products; 3. Installation and debugging of the whole machine in the user's environment.

If any sewing machine enterprise wants to produce a sewing machine with qualified quality and specifications, the assembly process of the sewing machine must have the following two basic technical requirements:

First of all, it is the finishing of parts. All sewing machine parts with surface treatment such as baking paint and electroplating have adhesive layer on the assembly joint surface (including hole, groove, plane and screw hole). Therefore, before assembly, such parts must be processed in advance according to the technological requirements before entering the assembly process.

Secondly, the cleaning and cleaning of parts. When talking about the assembly details of the sewing machine, master Fu yanghuiqing, the assembler of Shanghai Huigong sewing machine No.3 Factory, said: "for our assemblers, the cleaning and cleaning of parts is very important, especially for the cleaning and cleaning of shaft sleeve, bearing and other parts. For example, in the assembly process, if all kinds of shaft parts are not cleaned in strict accordance with the process requirements, there will be high temperature of the shaft sleeve, excessive transmission torque, sand, chips and other debris sandwiched in between to accelerate the wear of the shaft sleeve, and even serious faults such as "engagement". Therefore, we must carefully clean and clean the product parts. "

It is also worth noting that cleaning and cleaning of sewing machine parts are different concepts. The cleaning of parts refers to the removal of residual chips, abrasives, paints, rust, etc. on the parts before assembly, while the cleaning of parts refers to the cleaning of parts with common cleaning solutions such as kerosene, light diesel oil and chemical cleaning solution. If the sewing machine manufacturers do not pay enough attention to the assembly process of the sewing machine and the workers are careless and do not assemble the sewing machine according to the specifications, it will affect the normal operation of the sewing machine products in the future.

Sewing machine assembler

All round practical talents

The development of modern sewing machinery industry puts forward higher assembly production requirements for the manufacturers of sewing machines, that is to say, "multi variety, small batch, strong personalization". In order to meet this objective trend and improve the level of technical workers in assembly shop, it is necessary to strengthen the training of technical workers. Wang Jianlin, an assembler in Shanghai Huigong sewing machine factory 3, said that to become a qualified assembler, it is necessary to have three months of prenatal training, and then the master will teach you one-on-one. After two years of practical learning, you can become a qualified assembler.

Qualified assembly workers are the mainstay of sewing machine production enterprises, and also an important guarantee for the normal operation of the machine. If the assembly operation does not meet the specified technical requirements and the mutual positions between parts and mechanisms are not correct, then the sewing machine will not work normally, which will affect the working performance of the sewing machine in a light way and become a scrapped machine in a heavy way. If there is a small burr left on the thread passing parts, the sewing machine will not work.

The sewing machine with poor assembly quality has low accuracy, poor performance, loud noise, heavy torque and short service life; on the contrary, some sewing machines with low accuracy can still be assembled with better performance products after careful selection, assembly and precise adjustment.

As a sewing machine manufacturer, it is necessary to expand the existing backbone team of assembly technology and promote the transformation of assembly line to lay a solid foundation for the development of high-quality sewing machine production. For the training of assembly talents, it will also be the top priority of enterprise staff training. A qualified assembler not only needs to understand various skills of new machine type assembly trial production stage, master new machine type assembly process specification, prepare simple process flow chart and organize assembly line production, but also has the ability to