CN102962641A - Elevator hydraulic oil tank piston and piston rod processing method - Google Patents

Abstract

The invention discloses an elevator hydraulic oil tank piston and a piston rod processing method, wherein the piston is matched equipped with a guiding loop and is made by adopting 20# or 45# steels; the piston external diameter tolerance f 8 is arrangedset; the fit with the piston rod is ordinary H8/h8; the jump of the external diameter to the piston hole is not more than one half of the external diameter tolerance; the roundness and the cylindricity of the external diameter are not more than one half of the external diameter tolerance; the perpendicularity error of the two end faces of the piston to the piston axis is controlled at 90 mm and not more than 0.05 mm; the piston rod adopts 35# or 45# steel; the tolerance level of working part of the piston rod gets f7-f9; the linearity error of the working surface is at 400 mm and not more than 0.04 mm; the piston rod is tempered after coarsely processing; and the hardness is controlled at 229-285HB; at the same time the high frequency quenching is carried out; and the thickness is 0.6-1mm and the hardness is 45-55HRC. The invention has the beneficial effects that the safety is good for increasing; and the operation controllability and the energy-saving effect are good for increasing.

Description

A kind of lift hydraulic oil container piston and piston rod processing method

Technical field

The present invention relates to the elevator technology field, relate in particular to a kind of lift hydraulic oil container piston and piston rod processing method.

Background technology

Hydraulic system has that power is large, operating pressure and the flow adjustability is good, heat can be brought back the advantages such as fuel tank.Lift is that a kind of lifting performance is good, goods lifting mechanism applied widely, can be used between the production line difference in height equipment goods handling, material loading, roll off the production line, places such as the lifting of parts, large-scale hangar material loading, blanking, storage loading and unloading during the part assembling altogether support the use with the vehicle such as fork truck and the quick loading and unloading of goods etc.It adopts hydraulic system to produce more power than other devices, and under equal power, the volume of hydraulic means is little, lightweight, power density large, compact conformation; Simultaneously, the hydraulic means Comparision is steady because lightweight, inertia is little, reaction is fast, hydraulic means is easy to realize quick startup, braking and commutating frequently.Certainly also there are many shortcomings in the hydraulic technique that is used for lift, for example, hydraulic pressure has more energy loss, hydraulic drive easily to reveal in transmission process, not only pollutes the work-yard, limits its range of application, causes fire casualty, and affects robust motion and the correctness of operating part; Oil temperature is changed relatively more responsive, the Hydraulic Elements accuracy of manufacture is had relatively high expectations, involve great expense, breaking down is difficult for finding reason, thereby, in the application of reality, need to should be able to guarantee by the volume that effective measures reduce the impact that unfavorable factor is brought, particularly fuel tank one by one on various aspects has a large amount of fuel feeding and during without oil return, minimum level should be on inlet filter when system, guaranteeing not can air amount, comprises the design of piston and piston rod.

Summary of the invention

The purpose of this invention is to provide and a kind ofly be conducive to improve the fuel tank working effect, can improve the operation controllability, can improve lift hydraulic oil container piston and the piston rod processing method of energy-saving effect, to solve many deficiencies of prior art.

Purpose of the present invention is come specific implementation by the following technical programs:

A kind of lift hydraulic oil container piston and piston rod processing method mainly are comprised of following steps:

⑴ piston is furnished with guide ring and adopts No. 20 or No. 45 steel are made, piston external diameter tolerance f8 is set, be generally H8/h8 with cooperating of piston rod, external diameter is not more than half of external diameter tolerance to beating of piston hole, and the circularity of external diameter and cylindricity are not more than half of external diameter tolerance;

⑵ side face of piston ring is controlled at the error of perpendicularity of piston axis and is not more than 0.05mm on the 90mm, and piston rod adopts 35 or No. 45 steel, and the working portion grade of tolerance of piston rod is got f7-f9, and the straightness error of working surface is not more than 0.04mm at 400mm;

⑶ piston rod carries out modified after roughing, and hardness is controlled at 229-285HB, carries out simultaneously high-frequency quenching, thickness 0.6-1mm, and hardness is 45-55HRC.

The beneficial effect of lift hydraulic oil container piston of the present invention and piston rod processing method is: be conducive to improve the fuel tank working effect, guarantee rational in infrastructure, security is good, be used in various different occasions, simultaneously, be conducive to improve operation controllability, raising energy-saving effect.

The specific embodiment

The embodiment of the invention described lift hydraulic oil container piston and piston rod processing method, its key step comprises:

⑴ piston is furnished with guide ring and adopts No. 20 or No. 45 steel are made, piston external diameter tolerance f8 is set, be generally H8/h8 with cooperating of piston rod, external diameter is not more than half of external diameter tolerance to beating of piston hole, and the circularity of external diameter and cylindricity are not more than half of external diameter tolerance;

⑵ side face of piston ring is controlled at the error of perpendicularity of piston axis and is not more than 0.05mm on the 90mm, and piston rod adopts 35 or No. 45 steel, and the working portion grade of tolerance of piston rod is got f7-f9, and the straightness error of working surface is not more than 0.04mm at 400mm;

⑶ piston rod carries out modified after roughing, and hardness is controlled at 229-285HB, carries out simultaneously high-frequency quenching, thickness 0.6-1mm, and hardness is 45-55HRC.

Claims (1)

1. a lift hydraulic oil container piston and piston rod processing method is characterized in that, mainly are comprised of following steps:

⑴ piston is furnished with guide ring and adopts No. 20 or No. 45 steel are made, piston external diameter tolerance f8 is set, be generally H8/h8 with cooperating of piston rod, external diameter is not more than half of external diameter tolerance to beating of piston hole, and the circularity of external diameter and cylindricity are not more than half of external diameter tolerance;

⑵ side face of piston ring is controlled at the error of perpendicularity of piston axis and is not more than 0.05mm on the 90mm, and piston rod adopts 35 or No. 45 steel, and the working portion grade of tolerance of piston rod is got f7-f9, and the straightness error of working surface is not more than 0.04mm at 400mm;

⑶ piston rod carries out modified after roughing, and hardness is controlled at 229-285HB, carries out simultaneously high-frequency quenching, thickness 0.6-1mm, and hardness is 45-55HRC.