A grinding positioning tool and v-groove grinding method for bending lower die

Abstract

The invention provides a grinding locating tool and V-groove grinding method for a bending lower die. By means of the grinding locating tool and V-groove grinding method for the bending lower die, theproblems that when two V grooves of an existing bending lower die are ground, grinding wheel grinding needs to be matched with manual grinding, the two V grooves are ground separately, the machiningprocess is complex, the machining time is long, and in addition, it is difficult to guarantee that the dimensional tolerance of the distance of central lines of the two V grooves meets the requirementcan be solved. The grinding locating tool comprises a magnetically-conductive base and locating blocks. The top face of the magnetically-conductive base is a horizontal locating face. The locating blocks are mounted in through grooves of the magnetically-conductive base in a matched and inserted manner, and the upper ends of the locating blocks extend out of the through grooves. The left side face of each locating block is parallel with the left side face of a corresponding rectangular locating groove of the bending lower die. Mounting holes which are through in the vertical direction are formed in the locating blocks and the magnetically-conductive base. Spring steel is mounted in the mounting holes in an inserted manner. The lower end of the spring steel is fixedly connected with the magnetically-conductive base. A tightly-jacking part is mounted at the position, at the left side of each piece of spring steel, on the magnetically-conductive base. Each tightly-pressing-against part can eject the upper end of the corresponding spring steel rightwards out of the corresponding through hole and enable the corresponding spring steel to tightly press out the right side face of the corresponding rectangular locating groove.

Description

technical field

[0001] The invention relates to the field of bending die processing, in particular to a grinding and positioning tool for a lower bending die and a V-groove grinding method. Background technique

[0002] figure 1 It is a lower bending die with two V-grooves of different sizes, and a rectangular positioning groove 2 is processed on the bottom surface of the lower bending die 1 . Each V-groove has two notch R surfaces 3, two angled slopes 4 and a groove bottom R-surface 5. The distance D between the centerlines of the two V-grooves has a very small dimensional tolerance, making it difficult to process. The traditional V-groove processing method is to use a grinding wheel to grind the angle slopes of the two V-grooves respectively, and then manually polish the R-side of the notch and the R-side of the groove bottom of each V-groove. It is difficult to ensure that the dimensional tolerance of the distance D between the centerlines of the two V grooves meets the...

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