METHOD FOR MANUFACTURING COMPOSITE DOUBLE-METAL FRACTURE SPLITTING CONNECTING ROD

摘要

The present invention provides a method for manufacturing a composite double-metal fracture splitting connecting rod, comprising the steps of: providing a moveable spacer at a large end of a mold cavity of a connecting rod, to divide the mold cavity into two separate parts; casting a connecting rod body and a connecting rod cap with material for the main body of the connecting rod; removing the spacer from the mold cavity when the majority of the material is solidified, then injecting material for a fracture splitting region into an empty mold cavity obtained after the removal of the spacer, and metallurgically bonding the two types of material to form a composite double-metal casting; then, separating the connecting rod body from the connecting rod cap by a fracture splitting apparatus along preset fracture surfaces; and positioning and accurately assembling through engaged staggered structures on the two fracture surfaces.

主权项

1. A method for manufacturing a composite double-metal fracture splitting connecting rod, characterized in that, when a blank of a fracture splitting connecting rod is to be manufactured, a fracture splitting layer is formed in a fracture splitting region and filled with material different from that for the main body of the connecting rod, the blank of the fracture splitting connecting rod is manufactured, and a fracture splitting process is then performed in the fracture splitting layer; and the method specifically comprises the steps of:
(A) providing a moveable spacer (7) inside a mold cavity of the connecting rod at a position where the connecting rod body and a connecting rod cap are connected to each other, to divide the mold cavity of the connecting rod into two separate parts; (B) casting the connecting rod body (1) and the connecting rod cap (3); (C) removing the spacer (7) from the mold cavity when the majority of material of the connecting rod body (1) and the connecting rod cap (3) is solidified, then injecting the molten fracture splitting material into an empty mold cavity obtained after the removal of the spacer 7 to form a fracture splitting material region, and metallurgically bonding the fracture splitting material with the material of the connecting rod body (1) and the connecting rod cap (3); (D) forming a fracture splitting notch (9) in the fracture splitting material region; (E) by means of fracture splitting, separating the connecting rod body from the connecting rod cap by a fracture splitting apparatus in the fracture splitting material region, to form two fracture surfaces having staggered structures which are engaged to each other; and (F) positioning and accurately assembling through the engaged staggered structures on the two fracture surfaces.