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Manufacturing method of splitting-type connecting rod

A manufacturing method and cracking technology, applied in the field of engine parts, can solve the problems of large investment in machine tools and cutting tools, high product rejection rate, distortion and deformation of fracture surfaces, etc., to reduce investment in finishing equipment and cutting tools, and product qualification rate High and consistent reset accuracy

Active Publication Date: 2014-08-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Manufacturing method of splitting-type connecting rod
  • Manufacturing method of splitting-type connecting rod
  • Manufacturing method of splitting-type connecting rod

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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 connecting rod manufacturing, in particular to a method for manufacturing a cracked connecting rod. The connecting rod is produced by casting or combined casting and forging process. During casting, a suitable material is placed at the interface (3) of the large head of the connecting rod cavity to interact with the molten metal and form a cracking interface after cooling. By applying a bursting load in the big hole of the connecting rod, the connecting rod body (2) and the connecting rod cover (4) are broken and split along the prefabricated cracking interface, and the intermeshed dog-tooth structure formed on the fracture surface makes the connecting rod body It has good meshing and repeat positioning characteristics with the connecting rod cover, and realizes the precise assembly of the two. This connecting rod manufacturing method can break through the limitations of cracking technology on connecting rod materials, and apply cracking technology to the manufacturing of connecting rods made of materials such as aluminum alloy, titanium alloy, and 40Cr steel; it can effectively improve the connecting rod existing in the actual cracking process Bulk tearing, cracking, slag falling, fracture surface deformation and other problems.

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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Application Information

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Patent Type & Authority Patents(China)
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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