CN105269398A - Orthogonal turning and milling method for inner rotary surface - Google Patents

Abstract

The invention discloses an orthogonal turning and milling method for an inner rotary surface. According to the orthogonal turning and milling method for the inner rotary surface, the datum point deviation value and the additional cutter length compensation value of a flat-end milling cutter and a flat-end milling cutter with round corners in the workpiece machining process are acquired, and the additional cutter length compensation value is added to the cutter length compensation function of a numerical control system. By the adoption of the method, the axes of the milling cutters are perpendicular to the inner surface of a part all the time for machining in the machining process, programming efficiency and accuracy are improved, machining quality is guaranteed, and a machining period is shortened.

Description

Rotary surface orthogonal turn-milling processing method in a kind of

Technical field

The invention belongs to digital control processing field, particularly relate to a kind of interior rotary surface orthogonal turn-milling processing method.

Background technology

Thin-wall part planform is complicated, and it is higher that profile coordinates requirement, and part contour dimension relative cross-section size is comparatively large, allowance is large, relative rigidity is lower, processing technology is poor, required precision is high, in process, very easily produce distortion, directly affects the raising of thin-wall part mass production yield rate.Although the research carried out for the high-speed milling technique of aerolite structural member has had more report at present, but still there is such or such problem in actual production process, particularly the high-rate wireless LAN technological process of certain large thin-wall element inwall and problem on deformation remain the reason that puzzlement improves working (machining) efficiency.

For the processing of large thin-wall inner surface, particularly there is the processing of the irregular key elements such as inner mesh, the processing method such as turning, boring is all helpless, now widely used rose cutter method for milling because of its working (machining) efficiency low, tool wear seriously wait all limit its practical application.

Adopt flat-end cutter orthogonal turn-milling processing method can solve this difficult problem well.

Summary of the invention

The object of the present invention is to provide a kind of interior rotary surface orthogonal turn-milling processing method, being intended to solve existing large-diameter thin-wall piece adopts normal axis to turn-milling cutting method, but deep hole machining is needed to configure special knife bar, the Form and position error of cutter is larger, affects the problem of the crudy of workpiece.

The present invention is achieved in that a kind of interior rotary surface orthogonal turn-milling processing method comprises:

Step one, according to workpiece select Digit Control Machine Tool, cutting tool choice flat-end cutter or band fillet flat-end cutter, formulate suitable machining process route;

Step 2, according to cutter location deviate, be attached on tool compensation function by " additional tool length compensation amount ", in process, the axis of milling cutter is processed perpendicular to the inner surface of part all the time.

Step 3, with milling cutter end face central point for cutter location, after starting " additional tool length compensation ", undertaken writing nc program and processing by part to be processed profile;

Further, the diameter of cutter location deviate size and workpiece radius and cutter has relation, and datum mark deviate H during flat-end cutter processing work and the relational expression between workpiece radius R and tool diameter D are:

$H=R-\sqrt{R^2-{\left[\frac{D}{2}\right]}^2}.$

Further, fillet r is with ₁flat-end cutter processing cutter location deviate H ₁with workpiece radius R ₁with tool diameter D ₁between relational expression be:

$H_1=R_1-\sqrt{R_1^2-{[\frac{D_1}{2}-r_1]}^2}.$

Therefore, the additional length offset general formula on butt end face milling cutters orthogonal turn-milling Inner arc surface is:

$H=R-\sqrt{R^2-{[\frac{D}{2}-r]}^2}$

The present invention adopts the processing method of tack milling, can give full play to the technical advantage of the efficiency of high-rate wireless LAN etc., ensures the production efficiency of thin-wall part machining;

Flat-end cutter carries out the processing method of orthogonal turn-milling, can meet rotary surface, particularly inner mesh Surface Machining demand in processing;

By the correction of additional tool length offset to tool length compensation amount, make the programmed method that undertaken programming by parts profile still effective.Improve programming efficiency, decrease the impact of Programming Error on machining accuracy.

Accompanying drawing explanation

Fig. 1 is the interior rotary surface orthogonal turn-milling processing method flow chart that the embodiment of the present invention provides;

Fig. 2 is the machining sketch chart of the flat-end cutter that the embodiment of the present invention provides;

Fig. 3 is the machining sketch chart of the flat-end cutter of the band fillet that the embodiment of the present invention provides;

In figure: 1, workpiece; 2, flat-end cutter; 3, the flat-end cutter of fillet is with.

Detailed description of the invention

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.

Refer to Fig. 1:

The embodiment of the present invention is achieved in that a kind of interior rotary surface orthogonal turn-milling processing method comprises:

S101, according to workpiece select Digit Control Machine Tool, cutting tool choice flat-end cutter or band fillet flat-end cutter, formulate suitable machining process route;

S102, with milling cutter end face central point for machining benchmark point, determine machining benchmark point deviate;

S103, according to machining benchmark point deviate, tool length compensation amount will be added, be attached on the tool length offset of control system.

Further, the diameter of datum mark deviate size and workpiece radius and cutter has relation, and as shown in Figure 2, datum mark deviate H during flat-end cutter processing work and the relational expression between workpiece radius R and tool diameter D are:

$H=R-\sqrt{R^2-{\left[\frac{D}{2}\right]}^2}.$

Further, as shown in Figure 3, fillet r is with ₁flat-end cutter processing datum mark deviate H ₁with workpiece radius R ₁with tool diameter D ₁between relational expression be:

$H_1=R_1-\sqrt{R_1^2-{[\frac{D_1}{2}-r_1]}^2}.$

Therefore, the additional length offset general formula on butt end face milling cutters orthogonal turn-milling Inner arc surface is:

$H=R-\sqrt{R^2-{[\frac{D}{2}-r]}^2}$

The present invention, according to machining benchmark point deviate, after calculating additional tool length compensation amount, by this tool length compensation amount, is attached to the tool length compensation of control system functionally.In process, the axis of milling cutter is processed perpendicular to the inner surface of part all the time.Due to the use of cutter additional length compensation rate, numerical control programming so should press parts profile programming, improves programming efficiency, shortens programming cycle.Due to the application of cutter additional length compensation rate, have modified tool length compensation amount, reduce the impact of Programming Error factor on accurate to dimension, ensure that machining accuracy.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (4)

1. in, a rotary surface orthogonal turn-milling processing method, is characterized in that, described interior rotary surface orthogonal turn-milling processing method comprises:

Step one, according to workpiece select Digit Control Machine Tool, cutting tool choice flat-end cutter or band fillet flat-end cutter, formulate machining process route;

Step 2, with milling cutter end face central point for cutter location, programme by machining profile;

Step 3, actual conditions according to cutter and processed key element, realize tool length compensation function by additional tool length compensation mode; The curvature of the size of additional tool length compensation amount and the end profile size of cutter, planform and processed part has fixing dependency relation.

2. interior rotary surface orthogonal turn-milling processing method as claimed in claim 1, it is characterized in that, the deviate size of cutter location is relevant with cutter resemblance with the diameter of workpiece radius and cutter, and during butt end face milling cutters processing work, the deviate H of cutter location and the relational expression between workpiece radius R and tool diameter D are:

$H=R-\sqrt{R^2-{\left[\frac{D}{2}\right]}^2}.$

3. interior rotary surface orthogonal turn-milling processing method as claimed in claim 1, is characterized in that, band fillet r ₁butt end face milling cutters processing cutter location deviate H ₁with workpiece radius R ₁with tool diameter D ₁between relational expression be:

$H_1=R_1-\sqrt{{R_1}^2-{[\frac{D_1}{2}-r_1]}^2};$

Therefore, the additional length offset general formula on butt end face milling cutters orthogonal turn-milling Inner arc surface is:

$H=R-\sqrt{R^2-{[\frac{D}{2}-r]}^2};$

In formula: H-adds tool length compensation amount; The radius of curvature of R-workpiece; The diameter of D-butt end face milling cutters; The radius of corner of r-butt end face milling cutters.

4. interior rotary surface orthogonal turn-milling processing method as claimed in claim 1, is characterized in that, additional tool length compensation is just like under type:

For open digital control system, by secondary development, enable control system by current known R, D, r value, calculate additional tool length offset, control system, by the tool length compensation amount that addition of tool length offset, performs tool length compensation function;

For the digital control system of non-open type, by working out the method for macroprogram, calculating additional tool length offset, in numerical programming program, when needs tool length compensation, directly calling this macroprogram, complete the function of additional tool length compensation;

For the digital control system of non-open type, tool length compensation Functional Design will be added in control instruction system, and will need to carry out additional tool length compensation, to use as a standard numerical control processing command.