The punch is increased Two Cavities Bottle Blowing Machine. In order to improve the service life of cold work molds, the above-mentioned performances should be comprehensively improved. Tempering twice to get a more suitable combination of strength and toughness..3mm, surface hardness is 1000-1300HV0 . Table 37CI4Mo4SV1 steel multi-arc ion plating process parameters and TiN film hardness arc current bias nitrogen partial pressure film The hardness of the layer can be seen from the data in Table 3. Table 27 Cr4Mo4SiV1 Steel Ion Nitrocarburizing Test Results Surface Hardening Depth of Infiltration Process/mm Matrix Hardness HV02 As can be seen from Table 2, 7Cr4Mo4SiV1 Steel Ion Nitrocarburizing layer has a higher hardness, greater than 1000HV, and the depth of infiltration Cold work mold service requirements, and the matrix still maintains high hardness after nitrocarburizing Adjust according to this principle until the requirements are met. If the positioning pin 2 extends from the pin If the length of the support is very long, the rigidity must be considered. ⑷For the shown The toroidal fixture of the car, the distance between the connecting plate and the middle carriage is as short as possible, as long as the connecting rod is guaranteed When the center line of the two positioning pin holes is perpendicular to the turning center line of the lathe spindle, there is a certain gap between the connecting rod and the pin support and the middle carriage. Recalibrate the position of the turning tool before finishing. ⑷When installing the connecting rod, it should be ensured that the connecting rod and the positioning pin can rotate freely, and it is easier to shake the carriage. Therefore, there is a difference H between the lower plane of the connecting rod and the machine bed. The following points must be paid attention to during processing: 1. (1) The height of the turning tool can be measured with a steel ruler, or the workpiece can be judged after rough turning, and it can also be found by the method of marking. Move the large carriage to the right, because the middle carriage will move to the outside, the reading of the dial indicator will become smaller. In this way, when the large carriage is longitudinally moved, the tool will use the positioning pin 2 is the center of the circle, and the center distance between the two positioning pin holes of the connecting rod is used as a radius to complete the turning of the torus.
