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How to improve the machining accuracy of mold parts

Improve the machining accuracy of mold parts

With the rapid development of China economic construction and the improvement of people's living standard, along with the rapid development of the construction industry China, demand for aluminum is increasing, so the demand for Aluminum Alloy extrusion mold design, manufacturing and production are also increasing.

Aluminum profile products are widely used in all walks of life, and the products are constantly developing toward diversification and complexity, and the processing precision of products is also getting higher and higher. Extrusion die is the basis of extrusion process, not only determines the shape, size, accuracy and surface state of extrusion products. The quality requirements are higher and higher, the processing requirements of the mold will also be improved.

The machining accuracy of die parts mainly includes dimensional accuracy, shape accuracy and position accuracy. The dimension accuracy refers to the degree of the tolerance of the actual size of the part after processing and the tolerance of the part size.

The machining accuracy is the degree of conformity between the three geometric parameters and the desired geometrical parameters required by the drawing after the machined surface is in the actual size, shape and position. The geometric parameters of the ideal, the size, the average size is; on the surface geometry, it is absolutely circle, cylinder, cone and plane, straight line and so on; the mutual position between the surface, is absolutely parallel, vertical, coaxial, symmetry etc.. The deviation between the actual geometric parameters of the workpiece and the ideal geometric parameters is called machining error.

The actual parameters obtained by any machining method are not absolutely accurate. From the function of the parts, as long as the machining error is within the tolerance range of the parts drawing, the machining accuracy is guaranteed. The quality depends on the machine on the assembly quality of the machining quality and the machining quality of parts of the machine, including mold parts processing precision and surface quality of two parts machining accuracy refers to the actual geometric parameters of parts after machining (size, shape and position) and the ideal geometric parameters consistent degree. The difference between them is called machining error. The machining error reflects the machining accuracy. The greater the error, the lower the machining accuracy, the smaller the error and the higher the machining accuracy.

Method of improving die accuracy

1. Mold processing equipment to ensure accuracy, Hubei Sheng from the introduction of advanced domestic and foreign sophisticated equipment, precision up to 0.002

2. Part precision requirements for die manufacturing

1. Die material accuracy requirements

Die steel processing tolerance control standard, template size, precision plate thickness, flatness, 300X300 + 0.005-0 + 0.005300X500, + 0.01-0 + 0.01500X800, + 0.01-0.01 + 0.015800X1200, + 0.02-0.02 + 0.02. Precision requirement of mould parts a. The guiding parts that affect the precision of die adopt MISUMI guide post and guide sleeve series, and exceed fine tolerance can be controlled within 0.002mm.

The cutting edge punching needle adopts MISUMI standard material: SKD-11 hardness: 60-62HRC, the blade shape is: DREGTH punch needle, usually used in forming products on the inner hole or cylindrical shape. The punching precision can be controlled at + 0.01mm, the special requirement can be 2um or so, and keep mirror surface.

3. The die size of the gap is mainly based on the die design and manufacture of precision mold production to ensure product size precision and shape and position accuracy, and the quality of the products (such as stamping section quality and burr height), it must ensure that the gap between the die punch die.