Method for processing pressing sleeve hole of large diameter in top and bottom cross member of oil press

Abstract

The invention discloses a processing method used for a large-diameter pressing sleeve hole in the upper and lower crossbeam of an oil hydraulic press. The method is used for processing four pressing sleeve holes (with the design diameter of 1142F9 / 1150F9 and the depth of 2100 plus or minus 0.1mm) of the upper and lower crossbeam in the oil hydraulic press of 165MN; the open size among the four processed pressing sleeve holes is 8950 plus or minus 0.2 multiplied by 3550 plus or minus 0.15mm; furthermore, the diagonal sizes of the four pressing sleeve holes are consistent; the process comprises the steps as follows: step 1: rough machining; a first step is preparation; a second step is that allowance of 10mm on single surface is retained for heavy boring and allowance of 10mm on single surface is retained for rough milling; step 2: semi-finishing; a first step is preparation; a second step is that, allowance of 1mm on single surface is remained for semi-finishing boring by a boring machine, the allowance of 1mm is retained for semi-finishing milling on single surface by a boring machine, a third step is that the allowance of 1mm is retained for semi-finishing milling by a sidecutter head, and a fifth step is that the open size and the diagonal size are measured; step 3: finish-processing; a first step is that the finish-boring is carried out by a boring machine and a second step is that the finish-milling is carried out by the sidecutter head.

Description

technical field [0001] The invention relates to a method for processing holes, in particular to a method for processing large-diameter pressing holes in upper and lower beams of a hydraulic press. Background technique [0002] The 165MN free forging hydraulic press is currently the largest press with the largest working tonnage designed and manufactured in China. The upper and lower beams are required in the press. The upper beam is ZG20MnMo steel casting, the overall size is 10700×5300×4150mm, and the net weight is 345 tons. The lower beam is an assembly part, which is assembled from the middle section I of the lower beam, the middle section II of the lower beam and the extended section of the lower beam with a combination of tie rods, nuts and key blocks. . [0003] like figure 2 , image 3 , Figure 4 Shown is the structure diagram of the upper beam. There are four pressing holes of the same size on the upper and lower beams. The design diameter of the pressing holes ...

AI Technical Summary

Problems solved by technology

Large-diameter holes are generally processed on large-scale boring and milling machines, but due to the structure, size, weight and other reasons of parts, it is impossible to process the large-diameter pressure sleeves of the upper and lower beams in such large-scale boring and milling machines on large-scale boring and milling machines hole, and there is no data on such a huge workpiece and large diameter hole processed in the prior art

Images