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Calculation method development for marking-off in process of processing plate parts

A calculation method and technology of parts, applied in the direction of calculation, 2D image generation, image data processing, etc., can solve the problems of difficulty in ensuring the accuracy of parts and cannot be separated, and achieve high accuracy, good practicability, and reduce labor intensity. Effect

Inactive Publication Date: 2011-05-04
李宗耳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The key process of processing parts made of sheet metal, such as containers, pipelines and other equipment, is to draw the surface graphics of the shape on the plane, which is called "surface development diagram". The process of drawing the development diagram is called surface development, often referred to as It is widely used in chemical industry, transportation, machinery manufacturing, product processing and other production fields. It is the basic operation skills of engineers and technicians of riveters, sheet metal workers, tin workers, fitters and other cold work types. In various books, it will be There are two methods of unfolding: drawing method and calculation method, but at present there is no real technology in the aspect of calculation method development. Although there are books titled "computational expansion" in the field of expansion, their essence is only for drawing The "line segment actual length" calculated by the unfolded diagram is ultimately still inseparable from the operation of using a ruler to draw the unfolded diagram. It is not a "one-step" calculation and unfolding. It is difficult to guarantee the accuracy of the workpiece, and only relatively simple shape

Method used

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  • Calculation method development for marking-off in process of processing plate parts

Examples

Experimental program
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Effect test

Embodiment 2

[0077] painted Figure 11a and 11b The development of the given surface, so that the plate seams are on the plane of symmetry, and the area of ​​the development is calculated.

[0078] 2-1 Analysis

[0079] 1. The oblique conical surface given is a conical surface and is a simple single surface. Establish the coordinate system 0-xyh as shown in the figure. The connection line between any point N on the bottom circumference and the top S of the cone SA , are the prime lines on the surface;

[0080] 2. Taking the position angle ω of point N as a parameter, then x N = R cos ω,y N = R sin ω;

[0081] 3. The distance between adjacent control points on the bottom circumference △S= NN' = 2R sin ( ). (ω'—the position angle of the previous control point N') can be used as the apex angle of the base triangle θ N = Parameters of ∠NSN’, θ N = cos -1 [{L N 2 +L N ' 2 - (2R sin ) 2}÷(2L N L N ’)], if 12 equally divided control points are taken on the bo...

Embodiment 3

[0104] painted Figure 15a and 15b Unfold the given surface and calculate the area.

[0105] 3-1 analysis

[0106] 1. The given surface is an oblique cylindrical surface, which is a kind of cylindrical surface. It is a simple surface. The characteristics of the cylindrical surface are: 1. It has two parallel and congruent bottom surfaces. 2. The prime lines are equal to the axis line ( L = ) and parallel, so it has the characteristics of expansion: a needs to establish an auxiliary coordinate system 0’-x’y’ on the upper bottom surface, such as Figure 16 , b expanded sub-triangles have two types of triangles with upper and lower bases, and any two adjacent triangles with upper and lower bases form a parallelogram. n =ω N , with x nz =x NZ , all prime lines of d are parallel to the expansion reference line——y Z axis, therefore, the two angles of each sub-triangle on the prime line side can be used as expansion angles, (referred to as the upper and lower base angles ...

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Abstract

The invention discloses calculation method development for marking-off in the process of processing plate parts, which comprises the following steps of: (a) analyzing by using a draft, and determining a position relation among geometrical elements according to a drawing; (b) establishing a form coordinate system; (c) establishing a development coordinate system; (d) listing a development calculation formula; (e) calculating parameter values according to the calculation formula in the step (d); and (f) drawing a development drawing according to the parameter values calculated in the step (e). The calculation method development for marking-off in the process of processing plate parts has the advantages that: the regularity is high; the complicated middle drawing operation is avoided, the dependence on field, equipment and the like is reduced, and the development drawing can be drawn without gauge by rarely using a ruler, so the labor intensity of an operator is reduced; the calculation formula has universality; and the calculation method development has high adaptability, precision, feasibility and practicability.

Description

technical field [0001] The invention relates to the field of basic process processing of cold-worked parts with plates as raw materials, in particular to a calculation method for processing plate parts. Background technique [0002] The key process of processing parts with plates as raw materials, such as containers, pipelines and other equipment, is to draw the surface graphics of the shape on the plane, which is called "surface development diagram". The process of drawing the development diagram is called surface development, often referred to as It is widely used in chemical industry, transportation, machinery manufacturing, product processing and other production fields. It is the basic operation skills of engineers and technicians in cold work such as riveters, sheet metal workers, tin workers, and fitters. It is described in various books There are two methods of unfolding: drawing method and calculation method, but at present there is no real technology in the aspect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00
Inventor 李宗耳
Owner 李宗耳
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