Multifunctional crown block piston rod

A piston rod, multi-functional technology, applied in the direction of piston rod, coating, mechanical equipment, etc., can solve the problems of high processing requirements of piston rod, low service life, fatigue fracture of piston rod, etc., and solve the problem of early fatigue fracture and wear , Good wear resistance and fatigue resistance, and the effect of improving service life

Inactive Publication Date: 2012-03-21
贵阳白云高原紧固件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of its processing directly affects the life and reliability of the entire product. The processing requirements of the piston rod are high, the surface roughness is strict, and the coaxiality and wear resistance are high. The basic feature of the piston rod is the slender shaft. Processing, which is difficult to process, has been troubled by processing personnel. In the prior art, the piston rod mainly has problems of early fatigue fracture and wear, and its service life is relatively low.

Method used

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Embodiment Construction

[0032] Below in conjunction with specific embodiment the present invention is described in further detail:

[0033] The piston rod of the multifunctional overhead traveling crane of the present invention is provided with a piston, and the piston rod and the piston form an integral structure.

[0034] The piston rod is made of 38CrMoAlA steel.

[0035] The production process route is: blank→forging→normalizing→rough turning→quenching and tempering→semi-finishing turning→stress relief annealing→grinding→ion nitriding→polishing.

[0036] Production process step of the present invention is:

[0037] 1. Forging

[0038] The blank heating temperature is 1100-1180°C, the forging temperature is: initial forging ≤ 1180°C, final forging ≥ 880°C.

[0039] 2. Normalizing

[0040] The normalizing process is: heating in a furnace at 600°C for 110 minutes, then raising the temperature to 960°C, heating for 150 minutes, installing the furnace vertically, placing the forging horizontally w...

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PUM

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Abstract

The invention provides a multifunctional crown block piston rod. A piston is arranged on a piston rod, the piston rod and the piston are of an integral structure, the piston rod is made of 38CrMoA1A steel, and the production process of the piston rod is as follows: blank-forging-normalizing-rough turning-tempering-semi finish turning-stress relief annealing-grinding-ion nitriding-polishing. The piston rod provided by the invention has high strength and rigidity and good wear resistance and fatigue resistance, so that the problem that the piston rod is easy to be fatigue to break and easy to wear in the early stage can be solved, and the service life of the piston rod is prolonged greatly and can be longer than 18 months.

Description

technical field [0001] The invention relates to a piston rod of a multifunctional crane, which belongs to the technical field of multifunctional crane equipment. Background technique [0002] The piston rod of the multi-functional crane is connected with the piston to form an important part that works in the cylinder of the multi-functional crane. The piston rod of the multi-functional crane is a moving part with frequent movements and high technical requirements. During the reciprocating motion, the piston rod is subjected to alternating loads of tension and compression and impact loads, as well as corrosive wear and abrasive wear. The quality of its processing directly affects the life and reliability of the entire product. The processing requirements of the piston rod are high, the surface roughness is strict, and the coaxiality and wear resistance are high. The basic feature of the piston rod is the slender shaft. Processing, which is difficult to process, has always tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J7/00B23P15/00C21D1/28C21D1/18C21D1/30C23C8/38
Inventor 朱润发
Owner 贵阳白云高原紧固件有限公司
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