Precision metal processing technology and stamping dies should be closely linked to the actual conditions of the factory’s machines and workers, and comprehensively consider the quality of parts, productivity, manufacturing costs, labor efficiency, environmental maintenance and the safety factor of manufacturing to determine and Design a production technology plan and mold design with excellent craftsmanship, economically reasonable, safe and reliable application, and then the production of stamping parts will ensure that the technical standards mentioned in the design drawings are met, and the cost of stamping production technology will be minimized And to ensure production safety. Today Wofu will introduce to you what are the requirements for high-quality precision metal processing.

Precision metal processing

1. The characteristics of precision metal processing stamping parts

(1) Precision standard of stamping parts
In order to meet the precision standards of stamping parts, the number of production processes must be determined through the design and calculation of the stamping die, because it is not only related to the material characteristics, drawing height, number of drawing steps and other factors, but also involves drawing diameter, conditions such as material thickness.

(2) Refined demand for stamping parts

Regarding the refinement requirements of stamping parts, the number of processes is specifically based on the complexity of its structure and shape, so it must be confirmed after comprehensive consideration of the number of bending angles, relative positions, and bending directions.

(3) The exquisiteness standard of stamping parts
When the stamping parts meet the requirements of precision and precision, the exquisiteness of the workpiece becomes the new production technology standard. When the section quality and specification precision of the stamping parts are high, it can be considered to increase the trimming process after the punching process, or directly select the precision punching process, and then get the exquisite stamping parts to increase its added value.

Precision metal processing

2. Production and processing technology of precision metal processing

(1) Draw parts drawings
The design analysis of parts and stamping dies is based on the stamping parts pattern, analyzing the shape features, specifications and dimensions, precision standards, raw material dimensions and tensile strength of the stamping parts, and using available stamping machine specifications and mold processing conditions, analyze the stamping process of parts and components such as basic elements such as manufacturing batches.

(2) Clear process plan
The calculation of specific production technical parameters is based on the analysis of stamping process ability. Standardized analysis is carried out from the aspects of equipment occupancy, mold processing difficulty level and life, convenience and safety level, etc., to screen out the characteristics of production technology and mold design And the key points, the content includes the characteristics of the process flow, the number of production processes, the sequence of the process and the form of composition, etc., to clarify the appropriate plan for the current production standard.

(3) Set production technical parameters
Production technical parameters refer to the data on which the process plan is formulated, such as various forming coefficients (drawing coefficients, bulging coefficients, etc.), drawing specifications of parts and their punching force, forming force, etc. There are two conditions for calculation. The first is that the process parameters can be calculated more accurately, such as the raw material application rate of the part’s layout, the punching pressure center, the workpiece area, etc.; the second is that the process parameters can only be approximated, as usual bending or deep drawing forming force, blank flattening specifications of complex parts, etc.

(4) Choose a stamping machine
Determine the stamping machine tool according to the characteristics of the stamping process to be carried out and the force characteristics of various stamping machine tools, and follow the specific principles of deformation force, deformation work, mold closing aspect ratio and contour specifications required for stamping parts processing, which suit the company The current machine status is used to select the machine type and tonnage reasonably.

Precision metal processing

3. Selection of stamping oil for precision metal processing

Stamping oil plays a vital role in the stamping process. Excellent cooling characteristics and extreme pressure and wear resistance have made a qualitative leap in the life of the mold and the enhancement of the precision of the workpiece.

(1) Selection of stamping oil for low carbon steel plate
The first thing that should be paid attention to when choosing to stamp oil for carbon steel plates is the viscosity of the drawing oil. Determine the best viscosity according to the production technology difficulty factor and degreasing standards.

(2) Selection of stamping oil for galvanized steel sheet
Due to the chemical reaction with chlorine-based additives, when selecting stamping oil for galvanized steel sheets, attention should be paid to the problem of white rust caused by chlorine-based stamping oil, and degreased as soon as possible after stamping.

(3) Selection of stamping oil for stainless steel plate
Stainless steel is a material that is easy to form and harden. It is stipulated to use drawing oil with high oil film strength and good sintering resistance. Usually, stamping oil with sulfur and chlorine mixed additives is used to avoid problems such as burrs and cracks on the workpiece while ensuring extreme pressure characteristics.

Precision metal processing has very high requirements for precision, so when choosing a precision metal processing manufacturer, we must determine the comprehensive strength of the company, including the production and processing equipment and the overall technical level of the operators, so as to ensure that the workpiece meets the specified requirements.