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    • 10. 发明专利
    • Improvements in and relating to machines for use in connection with forging
    • GB511734A
    • 1939-08-23
    • GB3205038
    • 1938-11-04
    • HERBERT DIENENTHALTHEO ZIMMERMANN
    • B21J13/10
    • 511,734. Forging. DIENENTHAL, H., and ZIMMERMANN, T. Nov. 4, 1938, No. 32050. Convention date, Nov. 18, 1937. [Class 83 (iv] In a self-propelled device 1 having. a carrier 21, which can be raised and lowered, for rotatable work-holding tongs 33, the carrier is resiliently supported at four points on a linkage controlled by a single lifting-cylinder 12. The support comprises four helical springs 17, 18 mounted on rods 15, 16 pivoted to bell-cranks 7, 8 pivoted to the machine frame. Each pair of cranks is connected together by a link '11 and the lifting-cylinder acts on the forward cranks. Arms 19, 20 on the carrier make pivotal engagement with members 22, 23 adapted to slide on the rods 15, 16. The end of the carrier remote from the tongs tends to move upwards and the springs 17 abut collars on the rods 15 and the lower ends of frames 37 secured to the' members 22. Buffer frames 24 connected to the bell-cranks have eyes 25, 26 for guiding rods 29 fixed to eyes 27, 28 on the carrier. Springs 32 on these rods abut flanged bushes 30, 31. The device has a driving motor 4 which is controlled for rapid running by a drum and for forging by a pedal to give intermittent movement.