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Automatic Allocation Method of Crankshaft Axial Machining Allowance

A technology of automatic allocation and machining allowance, applied in automatic control devices, metal processing equipment, metal processing machinery parts, etc., can solve problems such as affecting processing efficiency, large amount of calculation, and large amount of measurement data, and achieve rational allocation and reduction. The effect of considering errors and improving the efficiency of binning

Active Publication Date: 2016-11-16
CRRC QISHUYAN CO LTD
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  • Description
  • Claims
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Problems solved by technology

The characteristics of this method are: a lot of measurement data, a large amount of calculation, time-consuming and labor-intensive, which seriously affects the processing efficiency

Method used

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  • Automatic Allocation Method of Crankshaft Axial Machining Allowance
  • Automatic Allocation Method of Crankshaft Axial Machining Allowance
  • Automatic Allocation Method of Crankshaft Axial Machining Allowance

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Embodiment

[0029] Assume that the theoretical size of the main journal 14 of the crankshaft blank is 98 mm, the gear journal 15 is 198 mm, and the crank thickness 18 is 52 mm. The theoretical size of the finished main journal opening is 100mm, the connecting rod neck opening is 200mm, and the thickness of the crank is 50mm. That is to say, in theory, from the blank to the finished product, the machining allowance for the inner and outer sides of the crank is 1mm. Figure 5 It is the actual measured size of the second gear pin journal and the first gear main journal in a crankshaft.

[0030] Manual surplus allocation scheme: the first surplus distribution is as follows: According to the principle of distribution from the middle to both ends, try to allocate the surplus of crank position 4 as 1, then the surplus of crank position 3 is 54-50-1=3, crank The margin at position 2 is 200-197-3=0, the margin at crank position 1 is 53-50-0=3, the margin at crank position 5 is 100-97-1=2, and the ...

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Abstract

The invention relates to the technical field of axial machining on crankshafts, in particular to an automatic allocation method for axial machining allowances of a crankshaft. Allocation on the machining allowances is reflected in the following steps performed on numerical control equipment: determining workpiece zero points; compiling an automatic measurement program and a computing method by utilizing an automatic measurement system of a processing center, so that inspection on all opening dimensions of the crankshaft can be rapidly finished; solving the difference value, relative to the actual opening center, of the workpiece zero point at each position by utilizing an algorithm; finding the optimal compensation numerical value and the compensation direction of each workpiece zero point by utilizing a comparison algorithm again, and further, performing compensation on the zero offset of each workpiece zero point, and therefore, the automatic allocation on the machining allowances of the crankshaft is realized. According to the method, all parts in an axial direction can be ensured to have the machining allowances, and moreover, the minimum machining allowances at two opposite sides are equal; the automatic allocation method is consistent with the traditional allowance allocation method in result.

Description

technical field [0001] The invention relates to a crankshaft machining method, in particular to a crankshaft axial machining allowance automatic allocation method. Background technique [0002] Before the traditional crankshaft is processed, the axial dimension of the blank is first checked manually, and all main journal opening dimensions, all connecting rod neck opening dimensions, and all crank thicknesses are manually checked. The measurement parts are as follows: figure 1 Shown, and then according to the measured size distribution of the next process allowance. All measured data are correlated, and a change in one size will affect all other sizes. At the same time, there is an opposition between the margins on the left and right sides of the crank. If the margin on one side is large, the margin on the other side must be reduced. Therefore, the whole crankshaft needs to be considered as a whole. It is necessary to ensure that there are machining allowances everywhere, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/00B23Q17/20G06F19/00
CPCB23Q15/013B23Q17/20
Inventor 刘德岭宣俊才刘刚
Owner CRRC QISHUYAN CO LTD
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