CN102091936B

CN102091936B - Method for processing crankshaft oil holes

Info

Publication number: CN102091936B
Application number: CN2011100284353A
Authority: CN
Inventors: 王新叶; 谢庆; 邱前进; 丁晓
Original assignee: QINGDAO ZICHAI BOYANG DIESD ENGINE CO Ltd
Current assignee: QINGDAO ZICHAI BOYANG DIESD ENGINE CO Ltd
Priority date: 2011-01-24
Filing date: 2011-01-24
Publication date: 2013-12-11
Anticipated expiration: 2031-01-24
Also published as: CN102091936A

Abstract

The invention discloses a method for processing crankshaft oil holes, which comprises the following steps: processing large marine crankshaft oil holes by using a numerical control plane milling and boring machine, a right-angle milling head and a crankshaft milling tool, installing a crankshaft on the crankshaft milling tool, then putting the obtained integral body on an operating platform of the numerical control plane milling and boring machine and tightly pressing the obtained integral body against the operating platform so as to form an angle alpha between the centerline of the crankshaft (on the XY plane of the numerical control plane milling and boring machine) and an X axis of the numerical control plane milling and boring machine; measuring the zero point A of a drilled straight oil hole, then drilling the straight oil hole; rotating the crankshaft so that a crank throw to be drilled is arranged in the horizontal position and fixed; rotating the right-angle milling head so as to form an included angle beta between the right-angle milling head and an axis of the numerical control plane milling and boring machine, wherein the sum of the angle alpha and the angle beta is equal to the degree of an included angle between an inclined oil hole and the central axis of the crankshaft; and offsetting the zero point, and programming so as to drill the inclined oil hole. Through adopting the technical scheme, holes with different angles can be processed without preparing special machine tools and clamps, and in the processes of trial production and small-lot production, the cost can be lowered effectively, the working hours can be saved, and the labor intensity can be reduced.

Description

The processing method of crankshaft oil hole

Technical field

The present invention relates to a kind of crankshaft oil hole processing method, particularly a kind of machining of oil hole method on medium seed diesel engine bent axle.

Background technology

The crankshaft oil hole traditional diamond-making technique is according to the size of every kind of bent axle and oilhole angle design special purpose machine tool and frock clamp, large and the bad adaptability of equipment investment, scrap build cycle and cost when processing new varieties bent axle are all very high, are unfavorable for trial-production and the small lot batch manufacture of product; Automatically the special plane of controlling if not feeding, the workman need to control the drill bit feeding constantly, and labour intensity is very large.

Summary of the invention

The problems referred to above that exist in order to overcome the prior art field, do not have crankshaft oil hole special plane or the fast and convenient processing method that completes the crankshaft straight inclined oil hole of air of inapplicable special plane while the invention provides a kind of in the situation that trial production or small lot batch manufacture.

The present invention utilizes digital control plane milling and boring machine, right-angle milling head, crank shaft milling tool to be processed, and bores straight oilhole and inclined oil hole of air on bent axle, specifically comprises the steps:

One, by crankshaft installed on crank shaft milling tool, the two is placed on as a whole on the workbench of digital control plane milling and boring machine and compresses, make the center line of bent axle become the α angle with the X-axis of digital control plane milling and boring machine on the XY plane of digital control plane milling and boring machine;

Two, measure with vertical major and right-angle milling head the coordinate A at zero point that bores straight oilhole respectively;

Three, bore the pre-hole of straight oilhole by vertical major, then drill through with drill gun, and pour out the aperture fillet with rose reamer;

Four, turning crankshaft, be horizontal the crank throw that will hole, with pressing plate, compresses bent axle;

Five, the Z axis of right-angle milling head winding number control plane milling and boring machine is rotated on the XY plane, make right-angle milling head become the β angle with the axis of digital control plane milling and boring machine, α, β sum equal inclined oil hole of air and crankshaft center axis angle angle, and to coordinate, A at zero point is changed;

Six, aperture the rotating coordinate system to inclined oil hole of air by the coordinate zero offset of right-angle milling head, make the X-axis of coordinate system parallel with the center line of inclined oil hole of air;

Seven, mill flat inclined oil hole of air vent surface with slotting cutter, bore pre-hole, with drill gun drilling deep hole tapping.

Processing method provided by the invention compared with prior art, its beneficial effect is to utilize existing equipment and frock resource, the combination of and right-angle milling head angle variable fixing by disposable frock angle, the oilhole of processing different angles, when the bent axle model changes without preparing special purpose machine tool and fixture, only need to increase suitable cutter, the change nc program gets final product, time is short, in trial production and small batch production process, can effectively reduce costs, save man-hour, improve working (machining) efficiency.And, owing to adopting the criterion numeral controlled machine, labor strength reduces.

The accompanying drawing explanation

Fig. 1 is the top view that the present invention bores inclined oil hole of air;

Fig. 2 is the view profile that bores straight oilhole;

In figure, mark:

1. digital control plane milling and boring machine; 2. right-angle milling head; 3. drill gun; 4. crank shaft milling tool; 5. bent axle; 6. vertical major; 7. pressing plate; 8. inclined oil hole of air; 9. straight oilhole; 10. trunnion; 11. crank web.

The specific embodiment

With reference to the accompanying drawings, in conjunction with an embodiment, technical scheme provided by the invention is described in detail.

Embodiment

With reference to Fig. 1-Fig. 2, bent axle 5 is arranged on the crank shaft milling tool 4 with wishbone, the two is placed on as a whole on the workbench of digital control plane milling and boring machine 1 and compresses, make crankshaft axis become the α angle with the X-axis of digital control plane milling and boring machine 1 on the XY plane of digital control plane milling and boring machine 1; Measure by vertical major 6 the coordinate A at zero point that bores straight oilhole 9, and measure definite with seeking the limit device; Measure as follows converted coordinate zero point after right-angle milling head 2 turns to: with right-angle milling head 2, the A point coordinates of the orientation measurement parallel at the axis with bent axle 5 is right-angle milling head 2 positions of end face B point in digital control plane milling and boring machine 1, measurement right-angle milling head 2 main shaft end faces are L to the distance at vertical major 6 centers, after right-angle milling head 2 turns over the β angle, coordinate directions X at zero point deducts L (1-cos β), Y-direction adds Lsin β, aperture rotating coordinate system by the coordinate zero offset of right-angle milling head 2 to inclined oil hole of air 8, make the X-axis of coordinate system parallel with the center line of inclined oil hole of air 8;

The pre-hole of by vertical major 6, boring straight oilhole 9, then drill through with drill gun 3, and pour out the aperture fillet with rose reamer;

Turning crankshaft, measure the actual size of trunnion 10 and crank web 11, by the peak of measurement crank web 11 and the peak of trunnion 10, calculate both differences in height on radius, and the adjustment bent axle makes the actual measured value of difference in height identical with calculated value, the crank throw that will hole is horizontal, completes the centering of bent axle 5, with pressing plate 7, compress bent axle 5; The Z axis of right-angle milling head 2 winding number control plane milling and boring machines 1 is rotated on the XY plane, make right-angle milling head 2 become the β angle with the axis of digital control plane milling and boring machine 1, α, β angle sum equal the angle angle of inclined oil hole of air 8 and crankshaft center axis, that is to say the angle of the inclined oil hole of air that will process; Mill flat vent surface with slotting cutter, bore pre-hole, with drill gun 3 drilling deep holes tapping.

Rotary crankshaft 5, repeat above-mentioned steps, completes the processing of other angle crank throws and trunnion oilhole.

Claims

1. the processing method of a crankshaft oil hole, be the processing method of utilizing digital control plane milling and boring machine (1), right-angle milling head (2), crank shaft milling tool (4) to carry out, it is characterized in that, bores inclined oil hole of air on bent axle, comprises following concrete steps:

One, bent axle (5) is arranged on crank shaft milling tool (4), the two is placed on as a whole on the workbench of digital control plane milling and boring machine (1) and compresses, make the center line of bent axle (5) become the α angle with the X-axis of digital control plane milling and boring machine (1) on the XY plane of digital control plane milling and boring machine (1); Turning crankshaft (5), be horizontal the crank throw that will hole, with pressing plate (7), compresses bent axle;

Two, measure respectively the coordinate A at zero point of straight oilhole (9) with vertical major and right-angle milling head;

Three, the Z axis of right-angle milling head (2) winding number control plane milling and boring machine (1) is rotated on the XY plane, make right-angle milling head (2) become the β angle with the axis of digital control plane milling and boring machine (1), α, β sum equal inclined oil hole of air (8) and crankshaft center axis angle angle, and to coordinate, A at zero point is changed;

Four, aperture the rotating coordinate system to inclined oil hole of air (8) by the coordinate zero offset of right-angle milling head (2), make the X-axis of right-angle milling head (2) parallel with the center line of inclined oil hole of air (8);

Five, mill flat inclined oil hole of air vent surface with slotting cutter, bore pre-hole, with drill gun (3) drilling deep hole tapping.

2. crankshaft oil hole processing method according to claim 1, is characterized in that, also is included on bent axle and bores straight oilhole, and it comprises the following steps:

One, bent axle (5) is arranged on crank shaft milling tool (4), the two is placed on as a whole on the workbench of digital control plane milling and boring machine (1) and compresses, make the center line of bent axle (5) become the α angle with the X-axis of digital control plane milling and boring machine (1) on the XY plane of digital control plane milling and boring machine (1);

Two, measure with vertical major and right-angle milling head the coordinate A at zero point that bores straight oilhole (9) respectively;

Three, bore the pre-hole of straight oilhole (9) by vertical major (6), then use drill gun (3) to drill through, and pour out the aperture fillet with rose reamer.

3. crankshaft oil hole processing method according to claim 1, it is characterized in that: by the peak of measurement crank web (11) and the peak of trunnion (10), draw both differences in height on radius, constantly adjust and make the difference in height that measures identical with calculated value, complete the centering of bent axle (5).

4. according to claim 1 or 2 or 3 described crankshaft oil hole processing methods, it is characterized in that: with seeking the limit device, measure coordinate A at zero point.

5. crankshaft oil hole processing method according to claim 4, is characterized in that, measures as follows converted coordinate zero point after right-angle milling head (2) turns to:

At the axis with bent axle (5), parallel direction is measured the position of end face B point in digital control plane milling and boring machine that the coordinate that A orders is right-angle milling head (2), the main shaft end face of measurement right-angle milling head (2) is L to the distance at vertical major (6) center, after right-angle milling head (2) turns over the β angle, coordinate directions X at zero point deducts L (1-cos β), and Y-direction adds Lsin β.