Connecting rod machining technology
A processing technology and connecting rod technology, which is applied in the improvement field of connecting rod processing technology, can solve the problems of difficult control, difficult to ensure that A1 and the large hole are on the same plane, accumulation of errors, etc.
Inactive Publication Date: 2012-07-11
扬州苏垦银河连杆有限公司
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Problems solved by technology
But bonding surface A to hole O 0 The distance L2±0.03mm is difficult to control due to the accumulated errors in the positioning of the large and small holes
That is, from the hole O 0 Departure is difficult to guarantee A1 and big hole O 1 on the same plane
Method used
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Embodiment Construction
[0021] The present invention as Figure 1-3 As shown: the connecting rod includes rod body 1 and connecting rod cover 2; After being combined (forming the mating surface A), a pair of screws 3 are connected as a whole, so that one end of the rod body 1 connected with the connecting rod cover 2 forms the large hole end of the connecting rod, and the other end of the rod body is a small hole end; After the mating surface 2 A2 is processed on the rod cover;
[0022] Firstly, the screw support surface I and the screw support surface II on both sides of the top surface of the connecting rod cover 2 are processed in one clamping with the alignment surface 2 A2 as the positioning reference;
[0023] Then, the rod body 1 and the connecting rod cover 2 are connected as one by a pair of screws 3;
[0024] Finally, with the two screw support surfaces as the axial positioning reference of the rod body, the large hole 12 and / or the small hole 11 are processed in one clamping.
[0025] I...
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The invention discloses a connecting rod machining technology, and relates to improvement on a connecting rod machining technology. Accumulated errors are transferred to dimensions of parts not in a mounting relationship, so the mounting dimensional accuracy of the whole product is improved. The connecting rod processing technology comprises the following steps of: machining two screw support surfaces on two sides of the top of a connecting rod cover in primary clamping by taking a jointed surface two as a positioning reference; connecting a rod body with the connecting rod cover through a pair of screws; machining large holes and small holes in the primary clamping by taking the two screw support surfaces as positioning references in the axial direction of the rod body. By analyzing dimension errors, the positioning references are re-selected for machining the connecting rod, and the dimension errors are transferred to the connecting rod cover, the two screw support surfaces of the connecting rod cover are taken as references, the distance from the two screw support surfaces of the connecting rod cover to a connecting rod cover joint surface is strictly ensured, and a connecting rod large hole joint surface A and a large hole O1 are furthest possibly positioned on the same plane.
Description
technical field [0001] The invention relates to the improvement of the connecting rod processing technology. Background technique [0002] The traditional processing technology for the fine boring of the large and small head holes of the connecting rod is: [0003] 1. With small hole O 0 As a positioning reference, use the mandrel to locate the small hole, and process the joint surface A1 on the rod body; due to the gap error between the hole and the mandrel, a certain error will occur; then, connect the connecting rod cover to the rod body; [0004] 2. With small hole O 0 The outer point is the positioning datum, and the large and small holes are processed in one clamping. The distance of surface A1 is relatively far, therefore, the error of positioning datum at this point will be multiplied. [0005] At present, some customers have put forward the requirement of symmetry between the joint surface of the large hole and the center line of the large hole (that is, the two...
Claims
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IPC IPC(8): B23B35/00
Inventor 苏爱民封钰陈文斌
Owner 扬州苏垦银河连杆有限公司