Consideration of manufacturing parameters in the design of grooved globoidal cam indexing mechanisms

Abstract

By considering the manufacturing variables involved in the processes of machining and assembly, analytical expressions for the turret motion and indexing accuracy of intermittent grooved globoidal cam mechanisms have been identified. Based on the kinematic and geometric relationships between the cam and its roller-follower turret, the effects on the output of the cam mechanism owing to clearances in the grooved cam and in the roller bearing, preload between the cam and its turret wheel and the cam taper angle have been investigated. As a result, the roller alternation in the cam-turret system has been analysed. Favourable parameters for the design, machining and assembly can be selected to manufacture such devices with improved turret motion and indexing accuracy. Worked examples are given to demonstrate the usefulness and effectiveness of the approach.

Geometrical Feature Analysis of the Movement of the New Type of Double-Hemisphere Rolling Gear Globoidal Cam Indexing Mechanism

“…In the research of double-hemisphere rolling gear globoidal cam indexing mechanism, conjugate boundary discussion and induced curvature analysis are very important, they are the mainstay for meshing performance of the indexing cam mechanism [3,4] . Differentiate the conjugate conditional equation: 22) 21 ( 2) 2 ( 12) 21 ( 1) 21 ( 1) 2 ( 1) 2 ( 12) 21 ( 2) 2 ( 11) 21 ( 1) 21 ( 2)…”

High Speed Machining and Motion Simulating of the Indexing Mechanism with Globoidal Cam

“…2). Two moving coordinates: O 1 -x 1 y 1 z 1 attached respectively to the driven dish and O 2 -x 2 y 2 z 2 attached respectively to globoidal cam, a fixed coordinate O-xyz attached to the frame and an auxiliary roller coordinate O 1 '-x 1 'y 1 'z 1 ' [1,2,3,4,5]. Equation of the globoidal cam profile.…”

Profile Error Synthetic Prediction Model for One-Side Milling of Spatial Cams

“…Conventional way of the globoidal cam production is the generating method using NC machinery. To apply this method, the cutter must be purpose-made, and the abrasion of the tool will impact the machining accuracy of the cam contour [1][2][3]. Yin [4] proposed a globoidal cam one-side machining and cutter location control method.…”