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A process method of variable cross-section chemical milling for bent pipe

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

Active Publication Date: 2019-03-19
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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  • A process method of variable cross-section chemical milling for bent pipe
  • A process method of variable cross-section chemical milling for bent pipe
  • A process method of variable cross-section chemical milling for bent pipe

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Embodiment Construction

[0033] parts as figure 2 The elbow part shown, the milled part is from D to A, with taper milling. 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 opposite to the arc AC is 65°, the CD length is 550mm, and the corrosion rate γ of the milling bath fluid is 0.025mm / min. The outer diameter R of the D end after taper milling is required D 40mm, A-end outer diameter R A It does not change to 10mm, and the outer diameter from the D end to the A end is evenly transitioned.

[0034] The taper milling part of the part includes two parts: straight pipe CD and curved pipe CA. The taper milling process is completed by descending at a constant speed → rotating at a constant speed → rotating at a reverse constant speed → rising at a constant speed.

[0035] Calculated based on part size, milling time based on corrosion rate The lift speed is the rotation speed

[0036] like ima...

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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 present invention relates to the technical field of machining. Background technique [0002] At present, it is not possible to carry out variable-section milling of pipe bends or pipe bends in China. US Patent US2881059, published on April 7, 1959, is about a process method for variable section milling of flat plate parts. This patent is aimed at flat plate parts. The advantage is that the parts are attached at two points. The speed of the two attachment points can be constant or variable speed, and the speed ratio is determined by the circumference ratio of the pulley. , can not mill complex parts such as elbows that cannot be hooked at two points. SUMMARY OF THE INVENTION [0003] At present, it is not possible to carry out variable-section milling of pipe bends or pipe bends in China, and there is no such process method. The invention relates to a process method for variable-section milling of a bent pipe, which solves the variable-section ...

Claims

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Application Information

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Patent Type & Authority Patents(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