In the High precision machining mechanical parts , Precision Machining Parts with holes generally account for 50% to 80% of the total number of parts. There are also various types of holes, such as cylindrical holes, conical holes, threaded holes and formed holes, etc.

There are many types of high precision machining for the small holes, and each process has its own advantages and disadvantages. Now the SCZY team introduces the methods of small holes machining and their characteristics.

1.Continuous punching: Using the method of partially overlapping rectangular punching mesh dies, it can process elongated holes, trimming, etc. Process features: accurate positioning, multi-form can be processed and shaped, high precision, no burr in the hole, can be processed after heat treatment, good interchangeability.

2.Hydraulic punching: Hydraulic punching is a processing method in which the material of the pipe wall is separated by the punch or the liquid pressure in the pipe under the support of the liquid pressure in the pipe after the hydraulic bulging is completed. The die device is not used in the whole process. Hydraulic punching does not require a die during the entire punching process, which has great advantages for processing parts that cannot be placed inside a die due to too small internal dimensions or a curved axis.

3.Laser punching: The opening is very straight and neat. The characteristics of high energy and high focus are not limited to the cutting pattern, which makes materials with high hardness and high melting point more and more easy to process, with smooth incision and low processing cost.

4.Etching and punching: low mold opening cost, low cost, high precision, no burr, pressure point, can be used to make various hole types, widely used in integrated circuits, fluorescent display screens, precise filtration, micro-electrodes, etc., can be manufactured Metal Parts that cannot be completed by various types of machining.

5.Electric discharge punching: fine-hole electric discharge machining has high production efficiency, suitable for the processing and manufacturing of large-scale parts and products; no cutting processing, saving raw materials; parts with high precision, stable size, good internal quality, and good interchangeability.