CN102672228B

CN102672228B - Camshaft installing hole segmentation pushes away the processing technique of boring

Info

Publication number: CN102672228B
Application number: CN201210145894.4A
Authority: CN
Inventors: 王好; 赵敏建; 董春; 荣建国
Original assignee: No70 Inst China Weaponry Industry Group
Current assignee: No70 Inst China Weaponry Industry Group
Priority date: 2012-05-12
Filing date: 2012-05-12
Publication date: 2016-08-31
Anticipated expiration: 2032-05-12
Also published as: CN102672228A

Abstract

The present invention relates to a kind of camshaft installing hole segmentation and push away the processing technique of boring, it comprises the following steps: 1. camshaft installing hole is thick, the semifinishing of blank hole；2. two dead eyes of right boring high order end；3. install and guide knife bar；4. two holes in the middle of boring；5. extension bar is installed；6. boring latter two hole.The present invention ensure that the precision of camshaft installing hole, axiality, cylindricity, and use this technique, solve the difficult processing problems of profound co-axial shafts bearing bore on camshaft support body, particularly suitable in the case of special tooling support and machine tool travel cannot be installed in centre or accessory size limits.

Description

Camshaft installing hole segmentation pushes away the processing technique of boring

Technical field

The invention belongs to Machining Technology field, be specifically related to the processing method that camshaft installing hole segmentation pushes away boring.

Background technology

Engine cam supporter is one of vital part on electromotor, and camshaft installing hole thereon is high accuracy Major axis bearing bore, camshaft is revolution at a high speed on camshaft installing hole.Therefore the precision of camshaft installing hole, axiality, cylindricity Require the highest, become the difficult point of camshaft support body processing.

General electromotor processing factory is all to use special plane (or special tooling) processing for the processing of this pores, and its principle is Processed by two ends and intermediate supports knife bar.For the restriction of the inner space on some parts, it is fitted without intermediate supports The position of knife bar, therefore the processing for this type component cannot use the special plane (or special tooling) of intermediate supports knife bar.As Use the method pushing away boring, i.e. first boring the first hole, then do guiding with this hole and support second hole of boring, analogize by this, boring other Hole, but owing to camshaft installing hole is longer or the stroke of the restriction of External Shape or lathe does not has to meet requirement.Therefore, exist Under the conditions of such.Processing for camshaft support hole needs a kind of reasonably technique.

Summary of the invention

The technical problem to be solved is to provide the processing method that a kind of camshaft installing hole segmentation pushes away boring, it is possible to Solving the difficult processing problems of profound co-axial shafts bearing bore on camshaft support body, particularly suitable special tooling of cannot installing in centre props up In the case of support and machine tool travel or accessory size limit.

Technical scheme: a kind of camshaft installing hole segmentation pushes away the processing technique of boring, it comprises the following steps:

1. camshaft installing hole is thick, the semifinishing of blank hole: position with the dowel hole in camshaft support dignity Overlap with positioning datum during polish, two ends, camshaft support body left and right are bored two identical holes of diameter；

2. two dead eyes of right boring high order end: position with the dowel hole in step 1. convexity wheel shaft supporter face and essence Add the positioning datum in man-hour to overlap, two dead eyes of right boring high order end；

3. install and guide knife bar: after the complete step of boring two dead eyes 2., knife bar is unclamped with handle of a knife, at handle of a knife and knife bar Between increase a guiding knife bar；

4. two holes in the middle of boring: position with the guiding knife bar in 3., it is ensured that the hole of interstitial hole and front end is coaxial, pushes away boring cam Two holes in the middle of axle supporter；

5. extension bar is installed: after boring step interstitial hole 4., handle of a knife is unclamped with guiding knife bar, at handle of a knife and guiding cutter An extension bar it is further added by between bar；

6. boring latter two hole: with step 4. in two interstitial holes location, use method 5. to bore two backmost Individual hole.

The present invention compared with prior art has the advantages that the present invention ensure that the essence of camshaft installing hole Degree, axiality, cylindricity, and use this technique, solve the difficult processing of profound co-axial shafts bearing bore on camshaft support body and ask Topic, particularly suitable in the case of special tooling support and machine tool travel cannot be installed in centre or accessory size limits.

Accompanying drawing explanation

The process chart of Fig. 1: the present invention；

The parts locally schematic diagram of Fig. 2: the present invention；

The outer end holes machining sketch chart of Fig. 3: the present invention；

The installation of Fig. 4: the present invention guides knife bar schematic diagram；

The boring intermediate bearing aperture schematic diagram of Fig. 5: the present invention；

An extension bar schematic diagram is increased in the middle of the guiding knife bar of Fig. 6: the present invention and handle of a knife;

Fig. 7: the present invention positions last three the hole machined schematic diagrams of boring with middle holes；

Specific embodiment

Illustrate specifically to tell about the technical scheme of enforcement below in conjunction with the accompanying drawings.

A kind of camshaft installing hole segmentation pushes away the processing technique of boring, and it comprises the following steps:

Fig. 1 is the process chart pushing away boring processing for this hole segmentation, and Fig. 2 is the schematic diagram of camshaft support body, its effect Being supporting cam wheel axle and the installation of intake and exhaust rocking arm, supporting cam wheel axle installing hole thereon is in-line hole in long distance, has 7 bearings Composition aperture, hole φ 48mm, precision 7 grades, axiality 0.03mm, and the highest with the relative positional accuracy at other position.Fig. 3 Fig. 7 The schematic diagram processed for each work step, Fig. 2 be camshaft installing hole be thick, the semifinishing of blank hole: camshaft installing hole is hair Base hole, first carries out thick, semifinishing.Slightly, semifinishing be not the highest to axiality and required precision, two bore hole can be used Processing scheme.Determining when slightly, semifinishing camshaft installing hole is by supporting the dowel hole location in dignity and polish Position datum coincidence；Fig. 3 is the schematic diagram of two dead eyes of right boring high order end: the knife bar of the processing of this holes has guiding merit Energy.The location of polish with thick, semifinishing is identical.Fig. 4 for install guide knife bar schematic diagram, segmentation push away the technique of boring be exactly After two dead eyes of the complete front end of boring, knife bar is not released, but handle of a knife and knife bar is unclamped, and again fills a guiding knife bar.This The stroke of model machine bed can be the longest.Guide knife bar Main Function when boring intermediate bearing aperture this knife bar end in boring In dead eye, and guide the knife bar bore hole of front end.Fig. 5 is the schematic diagram in two holes in the middle of boring, during bore hole, uses boring The dead eye crossed guides knife bar, it is ensured that the hole of interstitial hole and front end is coaxial.Fig. 6 is for installing extension bar schematic diagram, in the complete centre of boring Behind two holes, knife bar is guided not release.But handle of a knife and guiding knife bar are unclamped, it is further added by the middle of knife bar and handle of a knife guiding One extension bar；This extension bar need not location, does not therefore coordinate with the hole of boring.Fig. 7 is the signal in boring latter two hole Figure, the principle of processing is similar with Fig. 5, simply uses interstitial hole to guide location knife bar, the complete follow-up bearing of last boring.If bearing Hole is the longest, then by the method increasing extension bar, boring dead eye below.

The feature of this technique is exactly in the case of the stroke of machining tool is not to grow very much, can process the longest coaxial aperture.

Claims

1. the segmentation of camshaft installing hole pushes away a processing technique for boring, and its feature comprises the following steps:

1. camshaft installing hole is thick, the semifinishing of blank hole: camshaft installing hole is made up of seven dead eyes, each dead eye By one, two, three, four, five, six, seven arrangements from left end.With on camshaft support body part bottom surface dowel hole position and and Positioning datum during polish overlaps, and camshaft support body bores respectively a diameter same holes from two ends, left and right；

2. boring first and second dead eye: select the location of the dowel hole on camshaft support body part bottom surface and determining during polish Position datum coincidence, uses knife bar right boring first and second dead eye, the knife bar hole complete with right boring to have and coordinates requirement；

3. install and guide knife bar: after the complete step of boring two dead eyes 2., knife bar is unclamped with handle of a knife, between handle of a knife and knife bar Increase a guiding knife bar, knife bar and guide knife bar to be linked togather, become a knife bar, and the hole complete with right boring has and coordinate requirement；

4. third and fourth dead eye of boring: enter first and second axle that 2. step bores with knife bar and the step 3. middle knife bar that guides increased In bearing bore, right boring the 3rd dead eye；Enter in second and third dead eye, right boring the 4th dead eye；

5. extension bar is installed: after the complete step of boring third and fourth dead eye 4., 3. handle of a knife is loaded with step guiding knife bar and unclamps, It is further added by an extension bar between handle of a knife and guiding knife bar；

6. boring five, six, seven dead eye: enter in third and fourth dead eye bored with the knife bar that guides that 3. knife bar and step increase, Boring the 5th dead eye；By that analogy, fourth, fifth dead eye, boring the 6th dead eye are entered；Enter the five, the six dead eyes, boring the 7th Dead eye.