Basic knowledge of machining process of mechanical parts

Due to the differences in the requirements and production conditions of the parts, the production process plans are also different during the processing and production of mechanical parts. When similar parts are produced by different process plans, their production compliance and economic benefits are also different. Under the condition of ensuring the quality of the parts, the process of formulating a reasonable and feasible process plan with good comprehensive technical and economic benefits is called the process plan of the part.

First, the processing and production process and technological process of mechanical parts

The production process changes from plan drawings to products, and it has to go through a series of production processes. Usually, the whole process of converting raw materials or semi-finished products into products is called the production process. The production process usually includes:

(1) The technical preparation process includes environmental trend investigation, outlook, new product judgment, process plan, standardization review, etc. before the product is put into production.

(2) or technological process refers to the process of simply changing the size, style, mutual position of surfaces, surface roughness or properties of raw materials and semi-finished products to make them into finished products. Analogy liquid forming, molding, welding, powder forming, cutting, heat treatment, surface treatment, assembly, etc., are all technological processes. The reasonable process is written into a technical document to guide the production, this technical document is called the process specification.

(3) Auxiliary production process refers to the auxiliary production activities necessary to ensure the stability of the basic production process.

(4) The production service process refers to the process of the organization, transportation, retention, storage, supply and product packaging and sales of raw materials.

2. The components of the process The cutting process of the parts is composed of many processes, and each process is composed of stations, work steps, cutting tools and installation.

(1) Process refers to the one-sided technological process that is continuously realized on one machine tool or on the same work site for one or a group of workpieces. Changzhou parts processing is to formulate the overall structure of the process. The main task is to select the processing method of each surface, determine the processing order of each surface, and the number of processes in the entire process. There are certain rules that must be followed in the formulation of the craftsmanship. The evidence of separate operations is whether the work location changes and whether the work is continuous.

(2) Working step refers to the one-sided working procedure in a working procedure when the speed and feed of the workpiece surface, cutting tool and cutting amount are kept constant. Changzhou parts processing must determine the number of processes that the workpiece will go through and the sequence of the processes. Only the name of the main process and the brief process of the processing sequence are listed, which is called the process path. The process of machining more surfaces can be divided into several steps. A process step is the basic unit that composes a process.

(3) Each time the tool cuts a layer of allowance from the machined surface, it is called a pass. Changzhou aluminum alloy processing is the basic unit that constitutes the machining process. The so-called process refers to one (or a group) of workers, on a machine tool (or a work place), that part of the process that is continuously realized for the same workpiece (or several workpieces at the same time). The main feature of forming a process is that the processing object, equipment and driver are not changed, and the content of the process is that when the margin to be removed is too large to be cut at one time or not suitable for one-time cutting, it can be divided into several cuttings.

(4) The one-sided process achieved after the installation of the workpiece after one clamping (positioning and clamping) is called installation.

(5) Each processing position occupied by the workpiece relative to the fixed side of the tool or equipment is called a station. In countless circumstances, the workpiece is only installed once in a process, and may occasionally be installed multiple times. The doorway axis generally needs to be installed twice in the No. 0 process, clamp one end of the car and the other end, and then turn around. After the U-turn, a new station is formed.