Manufacturing method of splitting-type connecting rod
A manufacturing method and pyrolysis-type technology, applied in the field of engine parts, can solve the problems of large investment in machine tools and tools, high product rejection rate, and high energy consumption, so as to reduce investment in finishing equipment and tools, and achieve high product rejection rate. , The effect of high product qualification rate
Active Publication Date: 2012-08-08
JIANGSU UNIV
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Problems solved by technology
[0006] The present invention can overcome the existing problems of the common connecting rod processing method of adopting traditional mechanical sawing and grinding joint surfaces: numerous procedures, large investment in machine tool equipment and cutting tools, high energy consumption, low processing efficiency, and high product rejection rate; at the same time, It can also solve the problems of tearing, slag falling, unilateral cracking or cracking, deformation of the big head hole and twisting deformation of the fracture surface that occur in the separation process of the connecting rod body and the connecting rod cover in the existing cracking technology
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Embodiment
[0028] figure 1 It is the schematic diagram of the connecting rod of this embodiment. The connecting rod includes a connecting rod body 2 and a connecting rod cover 4, both of which are precisely meshed by the canine-tooth structure on the cracking surface 3, and then locked by bolts 5.
[0029] Embodiment The connecting rod is made of forged aluminum alloy LD10 with a melting point of 650 degrees Celsius. Wrought aluminum alloy belongs to aluminum-magnesium high-strength matrix aluminum alloy, which has high strength and rigidity, easy cutting and plastic processing, and can be strengthened by heat treatment. After solution treatment and artificial aging, the strength is high, and the connecting rod material can greatly reduce the weight of the product. And increase the bearing stability of the connecting rod. The cracking material is AZ31 foil, the thickness of the foil is 0.15mm, the composition of AZ30 is: w (Al) = 2.5% ~ 3.5%, w (Zn) = 0.6% ~ 1.4%, w (Si) = 0.1% , w (C...
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Abstract
The invention relates to the field of manufacturing of a connecting rod, in particular to a manufacturing method of a splitting-type connecting rod. The connecting rod is produced by using a casting process or a casting-forging combined process. In casting, a proper material is arranged at an interface (3) of the large head part of a connecting rod cavity so that the proper material interacts with metal liquid and a splitting interface is formed after cooling; expansion load is applied into a large head hole of the connecting rod so that a connecting rod body (2) and a connecting rod cover (4) are ruptured and split along the prefabricated splitting interface, mutually meshed interlocking structures are formed on the rupture surfaces so that the connecting rod body and the connecting rod cover have excellent meshing performance and resetting characteristic and can be assembled together accurately. The manufacturing method of a connecting rod can break through the limitation in connecting rod materials from the splitting technology, so that the splitting technology can be applied to the manufacturing of connecting rods made of materials such as aluminium alloy, titanium alloy, 40 Cr steel, and the problems existing in the practical splitting technology, such as tearing of the large head of the connecting rod, splitting failure, residue falling and rupture surface deformation, can be improved effectively.
Description
technical field [0001] The invention relates to the technical field of engine parts, in particular to a method for manufacturing a cracked connecting rod, which is suitable for manufacturing connecting rods in industries such as gasoline engines, diesel engines, and compressors. Background technique [0002] The connecting rod is a high-precision key part in the engine, which is composed of a connecting rod body and a connecting rod cover connected by bolts. The traditional connecting rod processing adopts the split processing method. After the connecting rod blank is forged as a whole, the joint surface of the connecting rod body and the connecting rod cover is processed by sawing, milling, grinding, etc., and the connecting rod body and the connecting rod are processed by rough machining and semi-finishing. Cover the large and small head holes, finish machining the positioning pin holes of the connecting rod cover and the bolt holes of the connecting rod body, assemble the...
Claims
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IPC IPC(8): B22C9/22B22C9/08B22D19/04
Inventor 姜银方龙昆何艺袁军黄利伟黄宇郭镇宁
Owner JIANGSU UNIV
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