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Technology method for variable-cross-section chemical milling of bend

A process method and variable cross-section technology, applied in the field of mechanical processing

Active Publication Date: 2017-06-13
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, it is not possible to realize the variable cross-section milling of bent pipes or bent pipe parts in China, and there is no such process method

Method used

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  • Technology method for variable-cross-section chemical milling of bend
  • Technology method for variable-cross-section chemical milling of bend
  • Technology method for variable-cross-section chemical milling of bend

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Embodiment Construction

[0033] parts as figure 2 For the elbow part shown, the milling part is from D to A, and the taper milling is carried out. Part outer diameter R 1 is 50mm, the radius R of the circle where the elbow AC is located is 400mm, the center of the circle is O, the central angle θ of the arc AC is 65°, the length of CD is 550mm, and the corrosion rate γ of the chemical milling bath is 0.025mm / min. The outer diameter R of the D end after tapered milling is required D 40mm, the outer diameter of end A is R A It does not change to 10mm, and the outer diameter transitions evenly from the D end to the A end.

[0034] The taper milling part of the part includes two parts: the straight pipe CD and the curved pipe CA. It descends at a constant speed → rotates at a constant speed → reverses and rotates at a constant speed → rises at a constant speed to complete the taper milling process.

[0035] Calculated according to part size, Milling time derived from corrosion rate then the lifti...

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Abstract

The invention provides a technology method for variable-cross-section chemical milling of a bend. The technology method is characterized by comprising the following steps that firstly, an acceptance check of a part is conducted, wherein severe scratches and bruises and severe oil dirt and corrosion pits should not exist on the surface of the part; secondly, pretreatment should be conducted on the to-be-milled part so that the surface can be clean; thirdly, chemical milling protection glue is laid on the inner wall of the part or the inner wall of the part is protected with other methods, and therefore the inner wall not needing to be milled is isolated from a chemical milling bath solution; and fourthly, a fixed point is the circle center at the position of the bend, at least one rigid rod stretches out from the position of the circle center, the other end of at least one rigid rod is clamped at the position of the bend of the bend type part, the length of at least rigid rod should be the radius at the position of the bend, and the other ends of other rigid rods can be clamped to the bend type part according to the part clamping stability.

Description

technical field [0001] The invention relates to the technical field of machining. Background technique [0002] At present, it is not possible to carry out variable cross-section milling on bent pipes or bent pipe parts in China. U.S. Patent No. 2,881,059, published on April 7, 1959, is about a process for variable-section milling of flat-plate parts. This patent is aimed at flat parts. The advantage is that the parts can be hung at two points. The speed of the two fastening points can be constant or variable, and the speed ratio is determined by the circumference ratio of the pulley; the disadvantage is that only flat parts can be milled. , cannot mill and cut complex parts such as elbows that cannot be hung at two points. Contents of the invention [0003] At present, it is not possible to realize the variable cross-section milling of bent pipes or bent pipe parts in China, and there is no such process method. The invention relates to a process method for variable-sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/04
CPCC23F1/04
Inventor 毛琳虹李连军马宇阳贾紫淇苏剑英
Owner HARBIN