Machining process of mechanical parts refers to the methods and steps of mechanical parts processing, in the machining of mechanical parts must be based on the machining process of mechanical parts, to comply with the processing technology requirements of the parts. So do you know what the machining process of mechanical parts content and steps are? Today I will share with you!
1. Determine the type of blank
The type of blank should be determined according to the material, shape and size of the part, and also consider the workpiece batch and production conditions. As shown in the figure, the diameter of the drive shaft is small, and the difference in the diameter of the outer circle of each section is not large, so the round steel can be selected for undercutting. The gear shaft shown in the figure, the diameter difference is large, in order to save materials and processing time, if the batch is large, but also has forging conditions, should choose to use forging blanks; otherwise, also choose round steel under the material. Bearing cover, the material is cast iron, the blank should be selected castings. Gear, the material is 40 steel, and the outer circle diameter is not large, small outer circle short, can choose round steel material. Gear, due to its outer circle and hole diameter are larger, a single piece can choose the corresponding thickness of steel plate gas section under the material, large quantities can be selected forgings, forging into a circular blank, so as to save materials, but also to reduce processing time, forging the mechanical properties of the blank is also better.
2. Determine the processing order of the parts
Processing order should be determined according to the type of blank, structure, size, processing accuracy, surface roughness and heat treatment and other technical requirements.
3. Determine the processing process
Determine the machine tools used in each process, workpiece clamping methods, processing methods, processing dimensions and inspection methods, including the next process left plus allowance. General small and medium-sized parts outside, inside the cylinder and plane are referred to a single margin, in a single piece of small batch production, the size of the blank is large to take the fire value, and vice versa, take the small value. Total margin: hand-shaped castings for 3-6mm; free forging or gas cutting parts for 3-7mm; round steel material for 1.5 ~ 2.5mm. process margin: semi-finishing car for 0.8 ~ 1.5mm; high-speed finishing car for 0.4-0.5mm.
4. Determine the amount of cutting and work time quota
The cutting dosage of single-piece small batch production is generally selected by the producer himself, and the quota of man-hours is set by the management.
5. Fill in the process card
With a brief description and process sketch to show the above content.
