Clamp for high-precision gear shaft external spline hobbing machining
An external spline, high-precision technology, applied in the direction of manufacturing tools, metal processing equipment, gear tooth manufacturing devices, etc., can solve the problems of restricting high-precision gear processing, large runout, low production efficiency, etc., and achieve improved outer circle positioning Low-precision clamping method, the effect of improving the dimensional accuracy of the tooth profile
Pending Publication Date: 2018-12-21
ANHUI MINGYAN GEAR
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Problems solved by technology
However, there is a positioning of the outer circle clamping, and the jerk in the tooth shape processing caused by the unbalanced clamping, the tooth shape control accuracy is low, and the jerk is large. Low
This positioning and clamping method with manual operation and low positioning accuracy has seriously restricted the processing of high-precision gears.
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[0011] Such as figure 1 As shown, a hobbing fixture for high-precision gear shaft external spline hobbing is characterized in that: the above-mentioned fixture for high-precision gear shaft external spline hobbing is installed between the hobbing machine thimble 110 and the worktable 111 , It is composed of clamp concrete 2, workpiece (gear shaft) 1.
[0012] Such as figure 2 , image 3 As shown in the enlarged view of point K, the clamp body 2 is from top to bottom, and is adjusted by the upper pressing plate 21, the expansion jacket 22, the fixing seat 23, the lower thimble 24, the lower thimble sleeve 25, the lower thimble spring 26, and the lower thimble in turn. The screw sleeve 27, the lower pallet 28, the lower pallet adjusting screw sleeve 29, the lower pallet spring 210, and the lower pallet nut 211 are constituted. The fixing seat 23 is fixedly installed on the plane of the hobbing machine table 111, and the upper pressing plate 21 is fixed to At one end of the fixing...
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The invention discloses a clamp for high-precision gear shaft external spline hobbing machining. The clamp is used for high-precision gear shaft external spline hobbing clamps, is installed in the middle of a gear hobbing machine ejector pin and a workbench and is composed of a clamp body and a workpiece. Due to the fact that the mode that the floating type inner ejector pin is used for positioning a center hole of the workpiece firstly and the workpiece is simultaneously clamped through an outer circle of an expansion clamp sleeve is adopted by the clamp body, a traditional clamping mode withlow outer circle positioning precision is improved, the tooth shape size precision is improved, and the one-time pass percent of a product reaches 99% or above.
Description
Technical field [0001] The invention relates to a gear hobbing fixture used for high-precision gear shaft external splines, belonging to the technical field of gear processing. Background technique [0002] At present, in the hobbing of the outer spline shaft of the gear shaft, most of the clamping methods are used to clamp the outer circle of the spline shaft by a three-jaw chuck. This conventional clamping method has simple clamping and does not require special fixture investment. The advantages. However, if there is an outer-circle clamping position, the tooth profile will be bounced due to unbalanced clamping. The tooth profile control accuracy is low and the amount of runout is large. In addition, the clamping jaws must be manually rotated with clamps during clamping, resulting in production efficiency. low. This manual operation and low positioning accuracy positioning and clamping method has severely restricted the processing of high-precision gears. Summary of the inve...
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IPC IPC(8): B23F23/06
CPCB23F23/06
Inventor 张雪诚胡广华
Owner ANHUI MINGYAN GEAR