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A micro-cutting measurement conversion device and its tolerance prediction method

A conversion device and micro-cutting technology, applied in the field of mechanical processing, can solve problems such as difficult interpretation of regression coefficients, unstable regression functions, large errors in regression mathematical prediction models, etc., to achieve good fitting effects, ensure diversity, and improve processing efficiency effect

Active Publication Date: 2017-12-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the principle of mathematical statistics, when the power of the independent variable of the polynomial exceeds 3, the interpretation of the regression coefficient becomes difficult, and the regression function is not very stable, so the 6th-order polynomial regression mathematical prediction model has a large error

Method used

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  • A micro-cutting measurement conversion device and its tolerance prediction method
  • A micro-cutting measurement conversion device and its tolerance prediction method
  • A micro-cutting measurement conversion device and its tolerance prediction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] like figure 1 , 2 , 3, and 4, a micro-cutting measurement conversion device, including a servo motor 1, a worm 2, a worm wheel 3, a partition 4, a measuring head 6, a tool 8, a workpiece 10 arranged on a machine tool workbench and used for processing Rotating mechanism for detection; the output end of the servo motor 1 is connected to the worm 2 through a coupling, the worm 2 cooperates with the worm wheel 3, the rotating mechanism is arranged under the partition 4, and the measuring head 6 and the tool 8 are arranged in the rotating mechanism;

[0043] Described rotating mechanism comprises: driving wheel 5, driven wheel 7, chain 11, seat cover 9, the stud 12 that is arranged on the right end of dividing plate 4 and the drive shaft 13 that is arranged on dividing plate 4 left ends; The driven wheel 7 The worm gear 3 is arranged on the transmission shaft 13 through the bearing, and the transmission shaft 13 passes through the dividing plate 4 and is connected with the...

Embodiment 2

[0045] Embodiment 2: as Figure 5 shown

[0046] ①Use the tool 8 to cut the workpiece 10;

[0047] ② After conversion by the rotating mechanism, use the probe 6 to measure the processed workpiece 10 online;

[0048] ③ Determine whether the processed size is less than 3mm; if it is less than 3mm, execute step ⑤, if it is greater than or equal to 3mm, execute step ④;

[0049] ④ Evaluate the tolerance grade after processing according to the standard tolerance table of the existing basic size section 3-1000mm, and then perform step ⑦;

[0050] ⑤ Use the power function model for curve fitting;

[0051] 501 extracts the basic size segment 3-250mm, and the tolerance levels are IT01, IT0, IT1, IT2, IT3, IT4 standard tolerance values, calculates the geometric mean D and makes a table, as shown in Table 1;

[0052] Table 1 Standard tolerance table of basic size segment 3-250mm

[0053]

[0054] 502 is modeled based on the power function method, and the power function model between...

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Abstract

The invention relates to the machining field, and specifically relates to a fine cutting measurement conversion device and a tolerance prediction method thereof. The fine cutting measurement conversion device comprises a servo motor, a worm, a worm gear, a separator plate, a probe, a cutter, a workpiece on a machine tool workbench, and a rotation mechanism. Relative to a six-order polynomial regression fitting prediction model, a power function fitting prediction model utilized by the tolerance prediction method, has a determination coefficient R<2> of a model equation, being more close to 1, and can get better fitting effect and higher accuracy. The horizontal and vertical coordinates for the fitting graph of the tolerance prediction method take the logarithm so that the basic dimension segment 0.01-3mm is enlarged and the relation between the geometrical mean value; the standard tolerance value can be reflected more truly and clearly; the processing-measurement for the workpiece can be finished on line; and the processing efficiency can be improved.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a micro-cutting measurement conversion device and a tolerance prediction method thereof. Background technique [0002] With the development of science and technology, aerospace, vehicles, communications and medical equipment and other fields require smaller and smaller parts, and higher requirements for machining accuracy and surface quality. The research level of micro-manufacturing technology has become an important basis for measuring a country's machinery manufacturing industry and even the entire manufacturing level. The integration of "design-processing-measurement" is the main trend of development at present, and when designing and processing micro-sized parts, there are relatively few online testing equipment, and offline testing will introduce new errors in the new clamping process, giving The processing process causes inconvenience and affects the processing effici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/02
CPCG01B21/02
Inventor 王西彬衣杰焦黎王东前项俊锋解丽静刘志兵颜培
Owner BEIJING INSTITUTE OF TECHNOLOGYGY