Zhongkai Dual -suction Cyntometer series products are small -batch production. The key parts of the design of the pump body parts are concentrated on the middle road hole of the pump body. The middle road holes occupy half of the pump body and pump cover. The same axis of each hole is required to be higher. The size of the holes is different, with staircases, and some large holes are in small holes. The processing of the hole cannot be seen during processing, which brings great inconvenience to the size measurement of the knife and hole during processing.

(A) Pump body (B) Pump cover (C) Pump body pump cover is machined together

  The processing process is currently adopted

We have not processed such parts before. Through investigation, we have learned that each manufacturer is basically processed on the bedding bed. The processing form is shown in Figure 2.

1. End face surface to be processed at both ends 

With a large rod, due to the constraints of the minimum pore diameter, the diameter of the rod is limited, and the diameter cannot be increased to improve the rigidity of the rod. The length of the rod is determined according to the length of the workpiece and the distance from the main shaft of the bed to the tail seat. One end of the rod is rigidly connected to the main axis of the bed, and the other end is supported on the tail seat of the bed. There are several square holes for knife on the pole to adapt to the processing of different position holes. All the central roads and end faces that need to be processed are completed in the installation of the pump body. In order to ensure the verticality of the two ends and the middle hole hole, one end of the end surface can be installed on the flat tray to complete the processing, and the other end must be designed to install it on the rod to complete the processing of the ends of the hole. , To ensure the tolerance requirements of the graphic.

Through analysis, this processing process can ensure that the same axis and verticality requirements of the two end faces and the middle road hole of each hole can be ensured, and the processing quality is stable. However, the processing efficiency is low, the design of the workmanship is complicated, and the technical level of the operator is high. The reasons for the low processing efficiency are: ① The workpiece materials are generally gray cast iron, and the amount of processing is large. Each hole must be entered multiple times to complete the processing. Each of the knife in the process of processing must release the tight bolt of the knife rod, and use a hammer to hit the tail of the knife pole. Trial cut measurement can be completed. ② The design and manufacturing of the dedicated knife plate of the processing end surface are complicated. ③ The length of the rod is large, and the diameter of the rod cannot be limited by the processing hole. The rigidity of the rod is poor. If the amount of knife is slightly large, the rod will vibrate.

crafts improvement

The purpose of process improvement is to improve processing efficiency. At present, the reasons that the general process affects the processing efficiency is mainly concentrated in the processing and adjustment of the tools in the middle road end surface, as well as the small cutting amount caused by the poor rigidity of the rod. The specific measures for improvement of process improvement are: ① All facial processing of the middle road holes is completed by the flat -handed set on the flat tray, and the original side processing uses a dedicated knife tray processing method. ② Change the support position and use a relatively short rod to increase the rigidity of the rod. ③ Use both ends to process them separately, and use the size to form a tool to reduce the adjustment time of the tool.