Mold processing refers to the processing of forming and blank making tools, including die-cutting molds and shearing molds. Usually, the mold consists of an upper mold and a lower mold, and the material is formed under the action of a press machine, with steel plates placed between the upper and lower molds. When the press is turned on, the workpiece determined by the shape of the mold will be obtained or the corresponding waste will be removed. From automotive dashboard components to electronic connectors, they can be molded using molds. Progressive mold refers to a set of molds that can automatically move processed workpieces from one workstation to another and obtain molded parts at the latter workstation. The mold processing technology includes four slide molds, extrusion molds, composite molds, punching molds, progressive molds, stamping molds, die-cutting molds, etc.
Basic characteristics of mold processing: 1. High processing accuracy. A pair of molds usually consists of a female mold, a male mold, and a mold frame, some of which can be multi piece split modules. Therefore, the combination of upper and lower molds, the combination of inserts and cavities, and the combination between modules all require high machining accuracy. 2. The shape and surface are complex. Some products, such as car panels, airplane parts, toys, and household appliances, have molding surfaces composed of various curved surfaces, making the mold cavity surface very complex. Some surfaces need to be processed through mathematical calculations. 3. Small batch. Mold production is not mass production, and in many cases only one pair is produced. 4. There are many processes involved. Milling, boring, drilling, reaming, and tapping are always used for mold processing. 5. Repeated production. The mold has a long service life. When the service life of a pair of molds exceeds their lifespan, a new mold needs to be replaced, so the production of molds is often repeated. 6. Imitation processing. Mold production sometimes lacks both drawings and data, and copying and processing must be based on the actual product. This requires high imitation accuracy and no deformation.
Mold processing flow: 1. Bottom processing, ensuring processing quantity; 2. Align the casting blank benchmark, check the 2D allowance and 3D contour; 3. Rough machining of 2D and 3D contours, non installation and non working plane machining; 4. Before semi precision machining, align the side reference surface to ensure accuracy; 5. Semi precision machining of 3D contours and 2D, semi precision machining of various guide surfaces and guide holes, precision machining of various installation working surfaces, leaving a margin for precision machining of process reference holes and height reference surfaces, and recording data; 6. Check and verify the machining accuracy; 7. Fitter inlay technology; Before precision machining, check the allowance of the insert by aligning the reference surface of the process reference hole; 8. Precision machining contour 2D and 3D, punching contour and hole position, precision machining guide surface and guide hole, precision machining process reference hole and height reference; 9. Check and recheck the machining accuracy.
Attention: 1. The process should be concise and detailed, and the processing content should be represented with numbers as much as possible; 2. Special emphasis should be placed on the key and difficult points of processing; 3. It is necessary to combine the processed parts and express the process clearly; 4. When the embedded parts need to be processed separately, pay attention to the technical requirements for processing accuracy; 5. After combined processing, the inserts that need to be processed separately should be installed with independent processing standards during combined processing; 6. Springs are prone to damage during mold processing, so mold springs with longer fatigue life should be selected.