Patent GB-979099-A (GB)
Title: Apparatus for finishing the exterior surface of extended bodies
IPC: B23B5/44
Filed: 1963-09-26
Abstract: 979,099. Polishing. HIGH-SHEAR CORPORATION. Sept. 26, 1963 [Dec. 27, 1962], No. 37955/63. Addition to 969,868. Heading B3D. A device for polishing the external surface of an elongated, cylindrical body comprises a hub having a hub axis; a hub gear immovably mounted on said hub; a drive plate journalled to the hub; an intermediate gear journalled to the drive plate; a spindle shaft having a shaft axis parallel to the hub axis and journalled to the drive plate; a spindle gear mounted to the spindle shaft to turn with the same, the spindle gear and hub gear meshing with the intermediate gear, whereby relative rotation of the hub and drive plate causes rotation of the spindle shaft around its own axis, and around the hub axis; a drive pulley pinned to the spindle shaft; a support arm journalled to the drive plate and rotatable around the spindle axis; an idler pulley supported by said support arm; a flexible, abrasive belt wrapped around said pulleys and driven by the drive pulley; adjustment means interlinking the support arm and the drive plate for adjusting the angular position of the support arm and thereby the spacing of the belt relative to the hub axis; drive means mounted to the hub for rotating the drive plate relative to the hub; and guide means mounted to the hub for centering a body to be polished on the hub axis. A polisher includes a hub having a central portion 12, with a passage 13 therethrough, and a peripheral portion 15 bolted thereto. Air motors 17, 18 supplied through a manifold 88 are mounted on the hub portion 15 and drive gears 21 meshing with a gear 23 secured to a drive plate 22 rotatably mounted by bearings 24, 25 on the hub portion 12. An intermediate gear 37 journalled in the drive plate 22 meshes with a gear 30 attached to the hub portion 12 and with a gear 41 secured to a shaft 39 journalled by needle bearing 40 and bearing 48 in a support post 45 threaded into the drive plate 22. An abrasive belt 50 passes round a drive pulley 43 attached to the end of the shaft 39 and round an idler pulley 49 on the end of a support arm 44 pivotally mounted on the post 45. Two polishing heads are provided 180 degrees apart for static and dynamic balance and for simultaneously polishing opposite sides of the workpiece. Links 58 attached to the support arms 44 have studs 59 engaging notches 57, spaced 180 degrees apart, in a ring 56 rotatably adjustable on the hub for varying the spacing of the belts relative to the hub axis. The ends of the two shafts 39 support guide means 60. Each shaft carries a bearing 61 journalled in a follower ring 62. A support plate 64 is held by a bearing 65 to the ring 62, so that the guide means can remain stationary. A nut 72 held between end plates 73, 74 threadedly engages an adjuster 70 having a groove 75 receiving a pin 76 on one end of a bell crank 77 pivoted to the support plate. The other end of the bell crank carries a wheel 79 for contacting the workpiece. A number of such devices are provided. A similar guide means 80 is provided on the other side of the hub. A guard 85 is attached by wing nuts 86 to the hub portion 15 and a handle 87 is similarly attached to the hub.