Welder Assembly Q&A

Author: Chief Editor: Zhu Hua
Publisher:
Publish Date: 2001-01-01
Features:
Fragment: Chapter 1: Basic Knowledge of Assembly 1. What is assembly? Answer: According to the specified technical requirements, assembling several parts into a sub-assembly or assembling several parts and sub-assemblies into a product is called assembly. More precisely: The process of connecting or fastening individual parts that have been processed and inspected to meet the requirements through various methods in sequence, making them into sub-assemblies or products, is called assembly. 2. What are the importance of assembly work? Answer: The importance of assembly work includes the following points: (1) Only through assembly can several parts be combined into a complete product. (2) Product quality and performance are closely related to assembly quality, that is, the quality of assembly work plays a decisive role in the overall product quality. (3) Some parts may not have very high precision, but after careful finishing and meticulous adjustment, they can still be assembled into products with good performance. 3. What are the assembly process steps of a product? What are their main contents? Answer: The assembly process consists of the following four parts: (1) Pre-assembly preparation ① Study and familiarize yourself with the product assembly drawing and relevant technical data to understand the product structure, the function of each part, the mutual relationship, and the connection method. ② Determine the assembly method. ③ Determine the assembly sequence. ④ Clean up the tools, measuring instruments, and auxiliary tools needed for assembly. ⑤ Compare the assembly drawing to count the parts, purchased components, standard parts, etc. ⑥ Clean and clean the assembly parts. ⑦ Some parts also need to be machined before assembly (e.g., scraping, finishing, balance testing, spot drilling, reaming, etc.). (2) Assembly work ① Sub-assembly—the process of assembling parts into sub-assemblies is called sub-assembly. ② General assembly—the process of assembling parts and sub-assemblies into the final product is called general assembly. (3) Adjustment and precision inspection ① Adjustment work involves adjusting the relative positions of parts or mechanisms, clearance, tightness of connection, etc., with the aim of making the mechanism or machine work harmoniously (e.g., adjusting the clearance of bearings, the position of liners, the axial position of gears, etc.). ② Precision inspection involves using measuring tools or instruments to inspect the working precision and geometric precision of the product until they meet the technical requirements. (4) Spraying paint, applying oil, and packing Spraying paint is to prevent unprocessed surfaces from rusting and to make the product's appearance beautiful. Applying oil is to prevent the working surface of the product and the machined surface of the parts from rusting. 4. How are production types generally classified? Answer: Production types are generally divided into three categories: job production, batch production, and mass production. 5. What is meant by job production? What are the characteristics of its assembly organization form? Answer: Job production is a production method that manufactures individual items very rarely, or even does not repeat them at all. The characteristics of the assembly organization form of job production are: (1) Fixed location. (2) Few people (only one or a group of workers are needed from start to finish).