CN105234638A - Piston rod processing technology - Google Patents

Abstract

The invention provides a piston rod processing technology which comprises the following steps: a, feeding: selecting a bar material made of corresponding material; b, forging: forging a workblank according to the size of a piston rod; c, clamping the workblank by a vice: drawing two end centre hole lines and respectively drilling center holes; d, annealing: removing stress; e, carrying out rough turning: carrying out rough turning and reserving 0.2-04 mm as balance; f, quenching and tempering: ensuring 62-65 HRC; g, carrying out finish turning: carrying out finish turning and reserving 0.04-0.06 mm as balance; h, accurately grinding: accurately grinding by a grinding machine to meet dimensional requirements and ensuring that the surface roughness is Ra 0.4~0.8 [mu]m; and i, carrying out mirror polish. The piston rod processing technology provided by the invention is simple in process, convenient to operate and good in surface treatment effect, and can improve fatigue resistance and abrasion resistance of the piston rod, so that the product quality is improved greatly and the production cost is reduced.

Description

A kind of piston rod processing technology

Technical field

The present invention relates to mechanical processing technique, particularly a kind of piston rod processing technology.

Background technology

The piston rod that current most of hydraulic jack uses general all milling or clamp shaping after, carry out grinding, Direct Electroplating after grinding, carry out abrasive band polishing after plating, then directly use; Because abrasive band particle is larger, plating bits between coating surface micro-line can not be removed, thus its surface shows coating surface under the microscope wedge angle, uneven, piston rod long-term reciprocating motion under hyperbaric environment can cause cut to seal, seal is fragile, piston rod surface also draws trace, the life cycle of oil cylinder entirety, the lost of life simultaneously.。

Summary of the invention

The technical problem that [1] will solve

The technical problem to be solved in the present invention is to provide a kind of easy to operate and piston rod processing technology that electroplating effect is good.

The technical scheme of [2] dealing with problems

The invention provides a kind of piston rod processing technology, it comprises the following steps:

A, blanking, select the bar of corresponding material;

B, forging, according to the size rough forging part of piston rod;

C, pincers worker, draw two ends centre bore line, bore center hole respectively;

D, annealing: remove stress;

E, turning roughing, 0.2-04mm surplus is stayed in turning roughing;

F, modifier treatment, ensure 62-65HRC;

G, turning fine finishining, 0.04-0.06mm surplus is stayed in turning fine finishining;

H, fine grinding, grinding machine refines dimensional requirement, ensures surface roughness Ra 0.4 ~ 0.8um;

I, mirror finish.

Further, in steps d, described annealing temperature is 130-230 DEG C, and temperature retention time is 4 hours.

[3] beneficial effect

Inventive piston bar processing technology, operation is simple, easy to operate and surface treatment effect is good, improves fatigue resistance and the wearability of piston rod, thus substantially increases the quality of product, reduce production cost.

Detailed description of the invention

Introduce the embodiment of the present invention in detail below.

The invention provides a kind of piston rod processing technology, it comprises the following steps:

A, blanking, select the bar of corresponding material;

B, forging, according to the size rough forging part of piston rod;

C, pincers worker, draw two ends centre bore line, bore center hole respectively;

D, annealing: remove stress;

E, turning roughing, 0.2-04mm surplus is stayed in turning roughing;

F, modifier treatment, ensure 62-65HRC;

G, turning fine finishining, 0.04-0.06mm surplus is stayed in turning fine finishining;

H, fine grinding, grinding machine refines dimensional requirement, ensures surface roughness Ra 0.4 ~ 0.8um;

I, mirror finish.

In steps d, described annealing temperature is 130-230 DEG C, and temperature retention time is 4 hours.

Inventive piston bar processing technology, operation is simple, easy to operate and surface treatment effect is good, improves fatigue resistance and the wearability of piston rod, thus substantially increases the quality of product, reduce production cost.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (2)

1. a piston rod processing technology, is characterized in that, comprises the following steps:

A, blanking, select the bar of corresponding material;

B, forging, according to the size rough forging part of piston rod;

C, pincers worker, draw two ends centre bore line, bore center hole respectively;

D, annealing: remove stress;

E, turning roughing, 0.2-04mm surplus is stayed in turning roughing;

F, modifier treatment, ensure 62-65HRC;

G, turning fine finishining, 0.04-0.06mm surplus is stayed in turning fine finishining;

H, fine grinding, grinding machine refines dimensional requirement, ensures surface roughness Ra 0.4 ~ 0.8um;

I, mirror finish.

2. piston rod processing technology as claimed in claim 1, it is characterized in that: in steps d, described annealing temperature is 130-230 DEG C, and temperature retention time is 4 hours.