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Nickel-based superalloy GH4169 hexagon socket bolt machining technology

A GH4169, nickel-based high-temperature alloy technology, applied in the direction of bolts, threaded fasteners, connecting components, etc., can solve problems such as low production efficiency, slow processing progress, and inability to efficiently control product quality, so as to achieve reasonable arrangement and guarantee Consistency, the effect of shortening the processing cycle

Active Publication Date: 2013-05-22
GUIZHOU JINGLI HANGTAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the internal hexagons are processed by EDM process after lathing. This process route has slow processing progress, low production efficiency, and product quality cannot be efficiently controlled.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: A process for processing nickel-based superalloy GH4169 hexagon socket head bolts. When using this process to process bolts with thread specifications less than or equal to M12, it mainly includes the following process steps:

[0028] (1) Blanking: According to the actual length and diameter of the material used by the bolt, the material is cut using a lathe;

[0029] (2) String grinding: carry out cylindrical string grinding on the blank after blanking;

[0030] (3) Lubrication: Lubricate the milled blank with copper plating;

[0031] (4) Upsetting: Put the lubricated blank into the upsetting mold, and use the hot upsetting method according to the bolt specifications to perform head upsetting with different types of multi-attack heading machines; this process step only processes the head size, not Processing inner hexagon size. Metallographic inspection shall be carried out on the head and tail parts after rough heading, to check whether the metal flow ...

Embodiment 2

[0043] Embodiment 2: A process for processing nickel-based superalloy GH4169 hexagon socket head bolts. When using this process to process bolts with thread specifications in the range of M12 to M24, the following process steps are mainly included:

[0044] (1) Blanking: According to the actual length and diameter of the material used by the bolt, the material is cut using a lathe;

[0045] (2) String grinding: carry out cylindrical string grinding on the blank after blanking;

[0046] (3) Lubrication: Lubricate the milled blank with copper plating;

[0047] (4) Upsetting: Put the lubricated blank into the upsetting mold, and use the hot upsetting method according to the bolt specifications to perform head upsetting with different types of multi-attack heading machines; this process step only processes the head size, not Processing inner hexagon size. Metallographic inspection shall be carried out on the head and tail parts after rough heading, to check whether the metal flo...

Embodiment 3

[0059] Embodiment 3: A process for processing nickel-based superalloy GH4169 hexagon socket head bolts. When using this process to process bolts with thread specifications in the range of M24 to M42, the following process steps are mainly included:

[0060] (1) Blanking: According to the actual length and diameter of the material used by the bolt, the material is cut using a lathe;

[0061] (2) String grinding: carry out cylindrical string grinding on the blank after blanking;

[0062] (3) Lubrication: Lubricate the milled blank with copper plating;

[0063] (4) Upsetting: Put the lubricated blank into the upsetting mold, and use the hot upsetting method according to the bolt specifications to perform head upsetting with different types of multi-attack heading machines; this process step only processes the head size, not Processing inner hexagon size. Metallographic inspection shall be carried out on the head and tail parts after rough heading, to check whether the metal flow ...

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Abstract

The invention discloses a nickel-based superalloy GH4169 hexagon socket bolt machining technology. The machining technology includes blanking, cascading grinding, lubricating, upsetting, coining, heat treating, cooling, sand blasting, machining, plugging grinding, aging treating, thread rolling, R circular arc rolling, flaw detecting and surface treating. The nickel-based superalloy GH4169 hexagon socket bolt machining technology is reasonable in arrangement of a process route, and improves connecting strength of the joint between the head portion of a bolt and a rod portion due to the fact that two-time hot upsetting forming and the R rolling process are adopted for the head portion of the bolt. Meanwhile, reasonable hot upsetting die materials and punch materials are adopted, and consequently manufacturing cost is reduced. Through adoption of upsetting forming of an upsetting die, the machining cycle of parts is greatly shortened, and size errors generated from repeated clamping in machining are reduced. Through adoption of combined machining of the upsetting process and the grinding process, the size uniformity of the parts and the quality stability of the parts are guaranteed.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to a processing technology of a connecting piece, in particular to a processing technology of a nickel-based superalloy GH4169 inner hexagon bolt. Background technique [0002] Nickel-based superalloy is a high-temperature alloy with nickel as the matrix (generally greater than 50%) in the range of 650-1000 °C with high strength and good oxidation resistance and gas corrosion resistance. The alloy has high strength. Widely used in the standard parts of the aviation and aerospace industries, among which the nickel-based superalloy GH4169 hexagon socket bolt is a fastener that is often used in some high-temperature parts of the connection structure. The nickel-based superalloy GH4169 hexagon socket bolt has the characteristics of high temperature resistance, the highest working temperature can reach 730 °C, corrosion resistance, high strength and high fatigue performance. Due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21K1/46
Inventor 王相波林燚刘清树
Owner GUIZHOU JINGLI HANGTAI TECH
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