Connecting rod integral workblank forged by forging die
A technology of connecting rods and blanks, applied in the direction of connecting rods, shafts, bearings, mechanical equipment, etc., can solve the problems of differences in strength, toughness and fatigue resistance of paired products, increase the difficulty of paired production, etc., and achieve good matching and easy processing Effect
Inactive Publication Date: 2008-09-03
常州久弘金属材料有限公司
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Problems solved by technology
[0003] The purpose of the present invention is: for the connecting rod body and connecting rod cover plate processed in sections at present, it not only increases the difficulty of matching production, but also easily leads to the inconsistency of the matching products in terms of strength, toughness and durability due to the inconsistency of the die forging process in the early stage. Practical problems with small differences in characteristics such as fatigue, providing a connecting rod overall blank for the production of connecting rods
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[0013] The accompanying drawings disclose a specific embodiment of the present invention without limitation, and the present invention will be further described below in conjunction with the accompanying drawings.
[0014] It can be seen from Fig. 1 and Fig. 2 that the overall blank 1 of the connecting rod forged by the die forging process has opposite pits at the big end and the small end, wherein the pit edge of the small end of the blank is circular, and the pit edge of the large end of the blank is It is elliptical, and the pit at the big end is divided into two parts by the short axis, the connecting rod body and the connecting rod cover plate. The pit of the big head corresponds to the crankshaft mounting hole 2, and the pit of the small head corresponds to the piston pin mounting hole 3.
[0015] It can be seen from Fig. 3 that the section of the connecting rod between the big end and the small end is in the shape of "I". The outer circle of the top of the connecting r...
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The present invention relates to a connecting rod whole blank forged by forging die which comprises a large end and a small end, between which is I-shaped connecting rod section. Wherein, the small end of connecting rod whole blank is correspondingly pit in roundness corresponding to mounting hole of piston pin, the large end of blank is correspondingly pit or perforative hole in ellipse corresponding to mounting hole of crankshaft, wherein, the pit of large end is formed by connecting rod body and connecting rod cover board, the outer circle on the top of the connecting rod cover board is an arc convexity. Because the pit of large end is ellipse, the machining allowance when cutting the connecting rod body and connecting rod cover board is reserved, the connecting rod and connecting rod cover board will close to circle after be cut in short axis along ellipse pit; because the connecting rod and the connecting rod cover board root from one, all the characteristic of material is identical and the matching capability of connecting rod assembly is better.
Description
technical field [0001] The invention relates to an integral blank of a connecting rod forged by a forging die. Background technique [0002] The connecting rod is used in the internal combustion engine as the main part of the force transmission. Since the connecting rod is subjected to high periodic impact force, inertial force and bending force in the process of force transmission, the connecting rod must have a certain strength, Toughness and fatigue resistance, as well as high processing accuracy. At present, the main production processes of connecting rods are die casting process, die forging process, powder forging process, powder metallurgy process, powder hot extrusion-forging process, carbon fiber reinforcement technology, etc., because die forging has a geometric shape and dimensional accuracy close to the final product, and can improve its internal structure and obtain higher mechanical properties. Practice has proved that the fatigue strength and reliability of st...
Claims
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IPC IPC(8): F16C7/02
Inventor 蒋银海陈红伟
Owner 常州久弘金属材料有限公司