CN106112412A

CN106112412A - The deep blind hole processing technique of spool high accuracy

Info

Publication number: CN106112412A
Application number: CN201610690562.2A
Authority: CN
Inventors: 王杰; 余辉; 魏庆富
Original assignee: WUXI YINGBEI PRECISION BEARING CO Ltd
Current assignee: WUXI YINGBEI PRECISION BEARING CO Ltd
Priority date: 2016-08-20
Filing date: 2016-08-20
Publication date: 2016-11-16

Abstract

A kind of spool deep blind hole processing technique of high accuracy that the present invention relates to, it is characterised in that it comprises the following steps: step one, slightly bore reaming；Step 2, slightly ream；Step 3, finish ream hole；Step 4, a reaming；Step 5, rough honing hole；Step 6, microhoning hole；Step 7, second reaming.The deep blind hole processing technique of spool of the present invention high accuracy has and is suitable for high-volume volume production, constant product quality, the advantage that there is not relief groove structure.

Description

The deep blind hole processing technique of spool high accuracy

Technical field

The present invention relates to a kind of deep blind hole processing technique of spool high accuracy.

Background technology

Spool is that the valve body movement by it is to realize the valve of the basic function of direction controlling, Stress control or flow-control Part, common valve cored structure is relatively easy, and manufacturing process is the most convenient, but precision is high, structure complicated, the manufacture of the many spools of function Technique all has its uniqueness, as having the spool of High-precision Deep Hole, and the wherein valve of the deep blind hole (draw ratio ＞ 10:1) of high accuracy Core (such as Fig. 1) manufactures more complicated, and how can realize volume production while ensureing procedure quality becomes a processing difficult problem.

The spool design requirement with the deep blind hole of high accuracy is: the hole of φ 6.363mm is more than or equal to 94.5mm in the degree of depth In the range of, meet roughness Ra 0.6 μm, circularity 0.0025mm, linearity 0.0025mm, size φ 6.363+0.005/0 (mm), bottom permission aperture φ 6.322-φ 6.368(mm).Diameter in following full text, linearity, circularity unit are mm, Roughness unit is μm.

Conventional processing methods is to increase a relief groove structure (such as Fig. 2) at feature bottom, it is desirable to the diameter of escape is wanted More than the limit superior of aperture φ 6.363+0.005/0, i.e. φ 6.368, but design requires that base diameter cannot be greater than φ 6.368, say, that can not there is relief groove structure, it is inapplicable that this results in existing technique.

Summary of the invention

It is an object of the invention to overcome above-mentioned deficiency, it is provided that one is suitable for high-volume volume production, constant product quality, does not deposits The deep blind hole processing technique of spool high accuracy at relief groove structure.

The object of the present invention is achieved like this:

A kind of deep blind hole processing technique of spool high accuracy, it is characterised in that it comprises the following steps:

Step one, slightly bore reaming

Step 2, slightly ream

Step 3, finish ream hole

Step 4, a reaming

Step 5, rough honing hole

Step 6, microhoning hole

Step 7, second reaming.

Specifically comprising the following steps that of a kind of spool deep blind hole processing technique of high accuracy

Step one, slightly bore reaming

Step 2, slightly ream

Being controlled 0.01 at φ 6.2 ± 0.015, circularity, linearity by dimension control, roughness controls at Ra3.2；

Step 3, finish ream hole

Being controlled 0.005 at φ 6.32+0.008/-0.005, circularity, linearity by dimension control, Rough control exists Ra1.6；

Step 4, a reaming

Machined bottom size is to φ 6.32 0/-0.02；

Step 5, rough honing hole

Being controlled 0.003 at φ 6.36 0/-0.005, circularity, linearity by dimension control, Rough control is at Ra0.8；

Step 6, microhoning hole

Microhoning hole reaches the design requirement of final hole in piece part, and dimensional accuracy is φ 6.363+0.005/0, circularity, linearity control System is 0.0025, and Rough control is at Ra0.6；

Step 7, second reaming

Second reaming, processes bottom part aperture diameter, meets the dimensional requirement of size φ 6.322-φ 6.368.

Compared with prior art, the invention has the beneficial effects as follows:

The deep blind hole processing technique reliability of spool of the present invention high accuracy is high, disclosure satisfy that Element Design is wanted after batch checking Asking, operation is simple, fixing, easy to process, quick, the most effectively improves working (machining) efficiency, reduce while ensureing quality Production cost.The deep blind hole processing technique of spool the most of the present invention high accuracy has and is suitable for high-volume volume production, constant product quality, no The advantage that there is relief groove structure.

Accompanying drawing explanation

Fig. 1 designs the structural representation of requirement for the present invention.

Fig. 2 is the structural representation of the product with escape.

Fig. 3 is the schematic diagram of the spool that step one of the present invention processes.

Fig. 4 is the schematic diagram of the spool that step 2 of the present invention processes.

Fig. 5 is the schematic diagram of the spool that step 3 of the present invention processes.

Fig. 6 is the schematic diagram of the spool that step 4 of the present invention processes.

Fig. 7 is the schematic diagram of the spool that step 5 of the present invention processes.

Fig. 8 is the schematic diagram of the spool that step 6 of the present invention processes.

Fig. 9 is the schematic diagram of the spool that step 7 of the present invention processes.

Detailed description of the invention

See Fig. 3 ~ Fig. 9, the deep blind hole processing technique of a kind of spool that the present invention relates to high accuracy, it comprises the following steps:

Step one, slightly bore reaming (Fig. 3)

The thick purpose boring reaming is to remove major part allowance；

Step 2, thick fraising (Fig. 4)

Thick fraising purpose is the shape correcting hole, is controlled at φ 6.2 ± 0.015, circularity, linearity by dimension control 0.01, roughness controls at Ra3.2, the size of stable hole, less because slightly boring size scattered error produced by reaming；

Step 3, finish ream hole (Fig. 5)

Finish reaming hole purpose is further stable dimensions, improves roughness, reduces size scattered error, reduces following process surplus, by chi Very little precision controlling controls 0.005 at φ 6.32+0.008/-0.005, circularity, linearity, and Rough control is at Ra1.6；

Step 4, a reaming (Fig. 6)

Reaming purpose be machined bottom size to φ 6.32 0/-0.02, prepare for the honing of rear road；

Step 5, rough honing hole (Fig. 7)

Rough honing hole purpose is to reduce final honing surplus, it is provided that parts size precision and surface quality, reaches final honing Craft precision requirement；By dimension control at φ 6.36 0/-0.005, circularity, linearity control 0.003, Rough control At Ra0.8；

Step 6, microhoning hole (Fig. 8)

Step 7, second reaming (Fig. 9)

Claims

1. the deep blind hole processing technique of spool high accuracy, it is characterised in that it comprises the following steps:

Step one, slightly bore reaming

Step 2, slightly ream

Step 3, finish ream hole

Step 4, a reaming

Step 5, rough honing hole

Step 6, microhoning hole

Step 7, second reaming.

A kind of deep blind hole processing technique of spool high accuracy the most according to claim 1, it is characterised in that its concrete steps As follows:

Step one, slightly bore reaming

Step 2, slightly ream

Step 3, finish ream hole

Step 4, a reaming

Machined bottom size is to φ 6.32 0/-0.02；

Step 5, rough honing hole

Step 6, microhoning hole

Step 7, second reaming