CN1057484C

CN1057484C - Method for processing small precise flat parts

Info

Publication number: CN1057484C
Application number: CN97106102A
Authority: CN
Inventors: 姜德鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-09-17
Filing date: 1997-09-17
Publication date: 2000-10-18
Anticipated expiration: 2017-09-17
Also published as: CN1179373A

Abstract

The present invention discloses a method for processing small precise flat parts. In the past, after an ordinary plate is cut and shaped, the plate is ground until the size and the common difference which are required are obtained, and the traditional method is replaced. A raw material is directly rolled in a cold roll mode, the size of thickness and the common difference which are specified by a drawing paper are obtained, the raw material is cut and shaped, other kinds of shaping mechanical processing and heat treatment are performed, the cleaning and the polishing are finally performed, and a finished product is obtained. The dimensional precision and the surface roughness of a work piece can be ensured by the technological method of the present invention. The metallurgical structure of the surface of the work piece is improved. The work efficiency can be raised by thousands of times. The cost can be greatly reduced. Lots of energy, materials and abrasive fillers are saved.

Description

A kind of processing method of small precise flat parts

The present invention relates to a kind of processing method of metal machine components.

Often run into the flat parts of some sizes and little (for example boundary dimensions is not more than 40mm) in the frame for movement, and that its gauge tolerance requires is very accurate, surface roughness requires very strict, especially hardness requires very high or material is very special (for example stainless steel), it is reported that common processing method is both at home and abroad:

A, the raw material sheet material stamping-out that will leave 0.10-0.50mm allowance are shaped;

B, carry out other molding equipment tool processing (for example boring aperture etc.);

C, heat treatment reach the hardness requirement;

D, deburring;

E, surface grinding machine carry out double-side grinding to dimensional tolerance.

Because accessory size is little, thin thickness, poor rigidity, the common plane grinder chuck is inhaled incessantly, and must put a small-sized fine groove sucker on the lathe sucker in addition could process, and stays the mill amount very big, and cutting depth and feed are very little during grinding, otherwise easily go out waste product, even accidents happened, cause working (machining) efficiency extremely low, production cost is high, also wasted many energy, material and abrasive material, not doing a good job to cause that also piece surface hardness descends or flexural deformation, and this is a consistent difficult problem of generally acknowledging in the machining.

Task of the present invention provides a kind of processing method of small precise flat machine components, can improve working (machining) efficiency significantly, reduces consuming and cost significantly, and improves the surface quality of part effectively.

In order to finish above-mentioned task, the inventor has done a large amount of tests, and following process is adopted in decision:

A, with gauge, precision and the surface roughness of raw material direct cold rolling to drawing regulation;

The shape and size that b, stamping-out are stipulated to drawing;

C, carry out the other molding equipment tool processing that blank operation can't finish (for example bore can't stamping-out aperture etc.);

D, protectiveness are heat-treated to required hardness;

E, cleaning polishing are to finished product.

Test shows, conscientiously adjust the roll slit of finishing mill, after the sheet metal of roughing is cold-rolled to thin plate again, its gauge precision reaches 0.005mm with interior not difficult, to roll for mill the part thickness dimensional accuracy is guaranteed, and the size basically identical, surface roughness can reach in the Ra0.16, the two sides parallelism error approaches zero, especially can improve the metallographic structure of piece surface effectively, improves the part durability.During the mould stamping-out, not only can obtain size, shape accurately, key elements such as breach, aperture also can once be gone out, and the key element that can't go out is replenished machining more really.Heat treatment belongs to electric furnace GPF (General Protection False technology, can't destroy the finish rolling quality of part.And last cleaning polishing operation can be removed the surperficial dirt that burr on the part and heat treatment cause effectively, and this operation can be finished by hand, but the most handy cylinder finishes, and once can process several ten thousand.Maximum tens of past grinding part, grind more than half an hour, cancelled the plain grinding operation now,, can rush to ten thousand in one hour only with the foundation of stamping-out as production efficiencies calculated, work efficiency improves thousands of times, also saved a large amount of energy, raw material and abrasive material, in addition, for some special materials that is difficult to grinding, adopt this technology also just to be readily solved.

The inventor is with a kind of embodiment that is processed as that cuts accurate edge bearing sheet on the crystal multi-cutting machine bed that silicon chip uses.

This workpiece material is the T10 steel, the limit exterior feature is of a size of 12 * 22mm or two kinds of square shape sheet shapes of 12 * 25mm, and gauge t is by 0.45mm to 10mm plurality of specifications (based on less than 1mm person), and the dimensional tolerance of t is ± 0.005mm, surface roughness requires Ra0.4, hardness HRc58-62.It is reported that adopt at present both at home and abroad this paper to start the way processing of double-side grinding behind the stamping-out of introduction, efficient is extremely low always, the percent defective height so processing cost is always high, is used processing method of the present invention instead now:

A, the T10 steel plate (band) of outsourcing is reserved the finish rolling surplus, drop into the finishing mill direct cold rolling to thickness t ± 0.005 size, surface roughness can reach Ra0.16 with interior minute surface degree;

B, on punch press, become the wide shape and size in 12 * 22mm or 12 * 25mm limit, connect key element such as aperture for thin part and all can once go out with the mould stamping-out;

C, bigger for gauge is difficult for the aperture of punching out, changes on the drilling machine and processes;

D, RCW guipure resistance furnace, GPF (General Protection False processing quenching hot in nature and tempering HRc58-62;

E, cylinder clean polishing and are machined to finished product.

Owing to adopted the approaching outsourcing T10 steel plate of gauge to make raw material, saved roughing and half finish rolling operation, can further reduce manufacturing cost.In the cylinder manufacturing procedure, can also further improve, comprise:

A, earlier the part input is polished machine (in the cylinder a kind of) and remove its surperficial dirt and burr;

B, put into cylinder, add debris material (for example paper scrap, broken the end of a thread, wood chip etc.) and make medium and roll, the cleaning agent that part is infected with in polishing machine is wiped;

Add onal leather bits in c, the cylinder and do the medium rolling, piece surface is polished.

The flat parts gauge unanimity that processes like this, reach the tolerance of drawing regulation fully, in the surface roughness Ra 0.16, hardness is also qualified, surface quality is significantly improved during than grinding, especially working (machining) efficiency can improve thousands of times, and production cost significantly reduces, and the energy, raw material and abrasive material etc. consume significantly and reduce.

Claims

1, a kind of processing method of small precise flat parts is characterized in that:

The shape and size that b, stamping-out are stipulated to drawing;

C, carry out the other molding equipment tool processing that blank operation can't finish;

D, protectiveness are heat-treated to required hardness;

E, cleaning polishing are to finished product.

2, processing method according to claim 1 is characterized in that said cold rolling preceding raw material are meant outsourcing cold-rolled steel sheet (band).

3, processing method according to claim 1 and 2 is characterized in that said cleaning polishing operation adopts the cylinder processing method to finish.

4, processing method according to claim 3 is characterized in that comprising in the cylinder manufacturing procedure:

A, elder generation polish machine with the part input and remove its surperficial dirt and burr;

B, put into cylinder, add the debris material and make medium and roll, the cleaning agent that part is infected with in polishing machine is wiped;

Add the leather chip in c, the cylinder and do the medium rolling, piece surface is polished.