High-efficiency and precise machining method for screw holes of lifting rings in plastic molds

Abstract

The invention discloses an efficient and precise machining method for a plastic mold hanging ring threaded hole and belongs to technical field of threaded hole machining technologies. The technological process in the method comprises the sequential steps that a workpiece material steel plate is sawn; rough milling is performed on the six surfaces of the material steel plate; the material steel plate is pressed; the center of a workpiece is determined; the center of a threaded hole of the workpiece is determined; a blind hole is drilled; a threaded bottom hole is drilled; a T-type hole is drilled; orifice chamfering is performed; internal threads are machined; shutdown is performed so that the threaded hole can be checked; the workpiece is taken down. For the threaded hole obtained through machining based on the method, the perpendicularity of the hanging ring threaded hole is high, and it can be guaranteed that the screw can be screwed to the bottom of a tooth hole; the machining method which is performed from bottom to top is adopted when the internal threads are machined, so that scrap iron will not fly around randomly, and safety is higher; meanwhile, the machined threads are thicker, high in tensile strength and high in safety, and besides the smoothness of the inner wall of the hanging ring threaded hole is higher. In addition, the efficient and precise machining method has the advantages that production is quicker, and quality is more stable.

Description

technical field [0001] The invention relates to the technical field of screw hole processing technology, in particular to a high-efficiency and precise processing method for screw holes of plastic mold suspension rings. Background technique [0002] In recent years, with the rapid development of the plastics industry and the continuous improvement of the strength and precision of general and engineering plastics, the application range of plastic products is also expanding, such as: household appliances, instruments, construction equipment, automobile industry, Japan In many fields such as hardware, the proportion of plastic products is increasing rapidly. A properly designed plastic part can often replace multiple traditional metal parts. The trend of plasticization of industrial products and daily products is on the rise. The production of these plastic products is inseparable from the mold. The mold is a tool for the production of plastic products. It is composed of some...

AI Technical Summary

Problems solved by technology

[0005] 1. The power of the spindle of the radial arm drill is not strong enough, the precision is not high enough, the spindle swings violently during the processing, and the verticality of the threaded bottom hole cannot be guaranteed. The threaded bottom hole made is often prone to inclination, ellipse, roughness, and the diameter tolerance of the threaded bottom hole It is not easy to control, and the cylindrical hole of the threaded bottom hole is often made into a conical hole, that is, the diameter of the outer end of the threaded bottom hole is larger than the diameter of the inner end, so that the eyebolt screw cannot be screwed to the bottom

[0006] 2. Use a radial drilling machine with a twist drill to drill holes. The jump is serious. It is very likely that the screw hole will be enlarged, which will cause the ring screw to be loose after screwing on. It is easy to loosen and fall off during the lifting process, posing a safety hazard

[0007] 3. In addition, the twist drill will be worn during the processing process, and the screw hole of the lifting ring produced is too small. Tapping is used to tap the teeth, which is easy to tap heavy teeth and rotten teeth. After the screw is screwed, it is easy to cause the screw tooth to break, which poses a safety hazard

[0008] 4. The tap tapping is processed from top to bottom. While processing, the iron filings are blown with an air gun. The iron filings blown out by the high-pressure gas fly in the air. Because the iron filings have a high temperature, they are easy to burn or fall off when they fall on the skin. To the combustibles to cause a fire, there are these safety hazards in tap tapping

[0009] 5. During the top-down processing of tap tapping, although the air gun is blowing all the time, it is inevitable that some iron filings cannot be blown out in time, so the high-temperature iron filings have higher hardness, and the high-temperature iron filings and the inner wall of the screw hole of the lifting ring Friction occurs, causing the inner wall of the screw hole of the lifting ring to be damaged, uneven and rough, which affects the assembly with the screw hole of the lifting ring

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