GB890203A - Improvements relating to tool grinding fixtures - Google Patents

Abstract

890,203. Grinding. HARIG MANUFACTURING CORPORATION. Dec. 13, 1960 [Sept. 20, 1960], No.42821/60. Class 60. A grinding fixture for holding a tool, e.g. a shaped punch 34, Fig. 1, comprises a block 11 mounted on a base plate 10, the block supporting spaced guide plates 30, which are rotatable about a horizontal axis, and a tool holder 12 vertically adjustable in the guides 30, having a means for moving the holder in the guides and also for providing frictional engagement with the guides during the vertical adjustment of the holder 12. A face-plate 22 is secured by bolts 23 to an indexing plate 14 which has a rearwardly projecting sleeve 19, a shaft 20 extending from the face-plate through the sleeve and carrying a handle 21 by which the face and indexing plates are rotatable within the bore 13 of the block 11 on bearings 25. Adjustable stops 27, 28 clampable to the peripheral edge of the face plate, may engage a slidable stop 29 to limit the rotation of the faceplate and a V-block 32 forming the base of the tool-holder 12 which is secured to a clamping plate 37 by a bolt 42 having a spring 45 inserted between its head and a recess for the block 32. The clamping plate 37 is grooved to engage with flanges 31 formed on the guide plates 30. The sides of the V-block 32 are grooved at 47 to provide alternative engagement faces for the inturned ends of a yoke 49 which carries a setscrew 50 whereby the tool 34 may be firmly held on the block 32. The bolt 42 and the spring 45 clamp the tool-holder 12 in frictional engagement with the flanges 31 while vertical adjustment is being effected by the toothed shank of an adjustment bolt 53, the head of which projects from one of the quide plates 30 whilst the toothed portion 52 engages a rack 51 cut into the inner end of the block 32. After adjustment the bolt 42 is tightened to secure the tool-holder to the guides 30. The base 10 is adapted to be mounted on a magnetized table and held firmly thereon in the required grinding relation to the grinding tool or wheel. The angularly adjusted position of the plate 22 and tool holder may be locked by a latch 15.