Cylindrical Cam Research Articles

Researches on the Basis of the Design of the Cylindrical Cam with a Swinging Follower (for the Specific Sliding) (3rd Report)

In the 2nd report the author studied the pressure angle on the grooved surface of the cylindrical cam with a swinging follower used for the threading attachment of Bechler Automatic Screw machine. It this paper, the theoritcal analysis for the specific sliding between the grooved surface and the swinging follower, for example, between the thread take-up cam and lever of the sewing machine was described, when various forms of the follower tip were given. In conclusion the relation between the swinging angle of the follower of various forms and the specific sliding was discussed, and the durability of this cam mechanism was also explained.

Researches on the Basis of the Design of the Cylindrical Cam with a Swinging Follower

Generally the cylindrical cam or the end cam with a swinging follower is employed for feeding saddles, chucking stocks and threading screws of an automatic screw machine and for driving apparutuses of automatic machines with complicated movements. With the cylindrical cam which acts comparatively slow and has to be made especially fine as in an automatic screw machine, it is desirable that the most suitable cam will be designed and worked up with so thorough deliberation that the grooved curves hold their theoretical accuracy for the actual cutting time and on the other hand it also must be considered that the sudden up and down of curves due to shortening of the idle movement timegive shocks to every parts of the apperatus. In this paper the foundamental equations of the design of the cylindrica1 cam with a swinging follower have been led, then it is expected that the error in the design of cams used for automatic machines will be corrected and their accuracy will be bettered.