A dimensional chain calculation demonstration experiment platform dimensional chain and calculation demonstration method

A demonstration method and a technology of a test bench, applied in the field of dimension chain teaching auxiliary equipment, can solve problems such as difficult for students to understand, lack of teaching auxiliary equipment, and inability to master well, and achieve quick disassembly and assembly, simple structure, and deepened understanding Effect

Inactive Publication Date: 2018-02-23
TAIYUAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the strong theoretical content of this part, it is difficult for students to understand, so they cannot master this part of the content well, and there is no teaching aid for this part of the content.

Method used

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  • A dimensional chain calculation demonstration experiment platform dimensional chain and calculation demonstration method
  • A dimensional chain calculation demonstration experiment platform dimensional chain and calculation demonstration method
  • A dimensional chain calculation demonstration experiment platform dimensional chain and calculation demonstration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Use the reverse calculation method.

[0031] Given A0 1 The limit deviation value is: 0.5mm~0.8mm;

[0032] Then, through two theoretical calculation methods, the tolerances and limit deviations of A1, A2, A3, A4, and A5 are obtained, as shown in Table 1 and Table 2:

[0033] Table 1 (unit: mm)

[0034]

[0035] Table 2 (unit: mm)

[0036]

[0037] Then actually measure the corresponding values ​​of A1, A2, A3, A4, A5 in each group of parts, and calculate their limit deviation accordingly.

[0038] The measurement results of each group of parts are shown in Table 3.

[0039] Table 3 (unit: mm)

[0040]

[0041] The measured value was compared with the given value, and the results were consistent.

Embodiment 2

[0043] Use the reverse calculation method.

[0044] Given A0 1 The limit deviation value is: 0.8mm~1.2mm;

[0045] Then, through two theoretical calculation methods, the tolerances and limit deviations of A1, A2, A3, A4, and A5 are obtained, as shown in Table 4 and Table 5:

[0046] Table 4 (unit: mm)

[0047]

[0048]

[0049] Table 5 (unit: mm)

[0050]

[0051] Then actually measure the corresponding values ​​of A1, A2, A3, A4, A5 in each group of parts, and calculate their limit deviation accordingly, as shown in Table 3. The measured value was compared with the given value, and the results were consistent.

Embodiment 3

[0053] Use the reverse calculation method.

[0054] Given A0 1The limit deviation value is: 1.0mm~1.5mm;

[0055] Then, through two theoretical calculation methods, the tolerances and limit deviations of A1, A2, A3, A4, and A5 are obtained, as shown in Table 6 and Table 7:

[0056] Table 6 (unit: mm)

[0057]

[0058]

[0059] Table 7 (unit: mm)

[0060]

[0061] Then actually measure the corresponding values ​​of A1, A2, A3, A4, A5 in each group of parts, and calculate their limit deviation accordingly, as shown in Table 3. The measured value was compared with the given value, and the results were consistent.

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Abstract

The invention provides a dimension chain calculation demonstration experiment table according to the dimension chain teaching requirement in the interchangeability course. Forward calculation and inverse calculation are demonstrated through the experiment table, theoretical calculation and experiment table actual measurement results are obtained and compared, so that student's understanding of the part is deepened, and the dimension chain content is better mastered. The technical scheme is as follows: the dimension chain calculation demonstration experiment table comprises a shaft, a right retaining ring, a gear, a left retaining ring, an elastic retaining ring for shafts and an experiment table base, wherein the shaft is horizontally fixed on the experiment table base and sleeved with the gear, the shaft is sleeved with both the right retaining ring and the left retaining ring which are located on two sides of the gear respectively, an axial adjustment clearance is reserved between the right retaining ring and the gear, one end of the shaft is sleeved with the elastic retaining ring used for fixing the left retaining ring, and comparison experiments are conducted through forward calculation and inverse calculation. The dimension chain calculation demonstration experiment table and a dimension chain calculation demonstration method can be widely applied to the field of auxiliary dimension chain teaching equipment.

Description

technical field [0001] The invention discloses a dimension chain calculation and demonstration experiment platform dimension chain and a calculation demonstration method, which belong to the technical field of dimension chain teaching auxiliary equipment. Background technique [0002] The present invention is aimed at the dimension chain content in the mechanical course: "Interchangeability and Measurement Technology" (hereinafter referred to as "Interchangeability"), and the calculation of dimension chain is one of the main contents of "Interchangeability". It includes two parts: forward calculation and reverse calculation: forward calculation is to know the nominal size and limit deviation of each component ring, and to find the nominal size and limit deviation of the edge banding ring, which belongs to the check calculation. Inverse calculation is the known tolerance and limit deviation of the closed loop, and the calculation of the tolerance and limit deviation of each p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B25/02
CPCG09B25/02
Inventor 盖小涛王喜刚
Owner TAIYUAN INST OF TECH
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