CN106141808B - One kind becomes cutting-depth adjusting device and radial cutting parameter optimization process - Google Patents
One kind becomes cutting-depth adjusting device and radial cutting parameter optimization process Download PDFInfo
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- CN106141808B CN106141808B CN201610548263.5A CN201610548263A CN106141808B CN 106141808 B CN106141808 B CN 106141808B CN 201610548263 A CN201610548263 A CN 201610548263A CN 106141808 B CN106141808 B CN 106141808B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
- B23Q15/12—Adaptive control, i.e. adjusting itself to have a performance which is optimum according to a preassigned criterion
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/4093—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
- G05B19/40937—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine concerning programming of machining or material parameters, pocket machining
Abstract
The present invention relates to micro processing field, become cutting-depth adjusting device and radial cutting parameter optimization process more particularly to one kind, including the dynamometer being arranged on platen, pressing plate and machine table, the machine table is arranged on dynamometer by pressing plate, also include riser, supporting case, hanging pillar, tight fixed bolt and support transverse slat, the riser is vertically set on machine table upper front part, the present invention is by adjusting position of the support transverse slat on hanging pillar, and determine actual processing position by reading scale, it highly shortened clamping adjustment time, make operation more convenient；Present invention support transverse slat remains with certain angle, in that context it may be convenient to meets the adjustment of radial cutting depth, improves operating efficiency.
Description
Technical field
The present invention relates to micro processing field, and in particular to one kind becomes cutting-depth adjusting device and radial cutting parameter optimization work
Process.
Background technology
In recent years, the development of Digit Control Machine Tool and cutter manufacture technology causes micro-cutting as a kind of for the three-dimensional sight chi that is situated between
The effective means of parts manufacture is spent, for other micro-fabrication technologies, micro-cutting has high in machining efficiency, is manufactured into
This is low, can carry out many advantages such as the processing in complicated small three dimensional type face, thus, it is a kind of enabling tool of great potential, gesture
It will be widely applied in fields such as biologic medical, instrument and meter, Aero-Space, intelligent micro robots.However, fine cut
It is mostly micron even submicron order to cut in process selected cutting data, thus cutting parameter during micro-cutting
Reasonable selection is most important, International Periodicals《International Journal of Machine Tools and
Manufacture》The 4th phase " Effects of the friction coefficient on the of volume 45 in 2005
Pass through the radius of edge and workpiece and knife of cutter in the texts of minimum cutting thickness in micro cutting " one
Coefficient of friction between tool determines minimum thickness of cut, and obtains the approximate expression of minimum depth of cut, by what is processed
Parts overall dimensions are in below 10mm, and characteristic size is in below 1mm, the now crystal grain of the physical dimension of cutting edge roundness and material
Influence of the size for process is non-negligible, often along with the generation of scale effect in process, it is resulting most
Small cutting depth phenomenon can have an immense impact on to process, therefore minimum thickness of cut can not rely on theoretical expression merely,
Need to be tested by means of trial cut, the cutting-in support meanss in experimentation use plain clamp and fixture mostly at present, it is impossible to side
Just the clamping depth of regulation workpiece, this also makes troubles to the selection of cutting parameter with further optimization.
The content of the invention
The technical problems to be solved by the invention be to provide it is a kind of it is easy to operate, carry efficient change cutting-depth adjusting device and
Radial cutting parameter optimization method.By optimizing radial cutting parameter, solve in minuteness milling process Unit cutting force and
The problem of cutter life controls；By obtaining influence of the different cutting parameters to Unit cutting force based on fuzzy logic method,
And determine the optimize technique method of minuteness milling processing radial cutting depth.
To solve above technical problem, the present invention adopts the following technical scheme that：
Technical scheme one：
One kind becomes cutting-depth adjusting device, including dynamometer, pressing plate and the machine table being arranged on platen, described
Machine table is arranged on dynamometer by pressing plate；Also include riser, supporting case, hanging pillar, tight fixed bolt and support transverse slat, it is described vertical
Plate is vertically set on machine table upper front part；The supporting case is vertically set in the middle part of riser, the hanging pillar be provided with dovetail groove with
And scale mark, the hanging pillar are located inside supporting case, and perpendicular to riser；The support transverse slat is provided with dovetail slide block, described
Support transverse slat is arranged on inside supporting case perpendicular to riser, and forms slip by the cooperation and hanging pillar of dovetail slide block and dovetail groove
Connection, the support transverse slat upper end are provided with clamping slot, and the tight fixed bolt is in contact through supporting case with support transverse slat；The branch
It is in a rectangular trapezoid to support transverse slat, the support transverse slat upper sideline forms angle beta with horizontal line, and the span of the angle beta is 3 °
~7 °.The tight fixed bolt is arranged in pairs, and is symmetrically distributed in the support transverse slat both sides.
Technical scheme two：
The radial cutting parameter optimization process step of the present invention is following (to carry out radial cutting ginseng using described device
Number optimization method)：
1. determine minuteness milling Unit cutting force computation model：
101 are fixed to workpiece in clamping slot, slidably support transverse slat, by tight fixed bolt transverse slat will be supported to fix, read
Initial manufacture scale on hanging pillar simultaneously records；
The 102 milling cutter profiles established in a cutting cycle and the milling cutter profile coordinate system in current cutting cycle, record
Peak value when the removed material of cutting and cutting depth constantly change every time, and maximum non-cutting depth is defined as, it is denoted as
hmax, it is determined that maximum non-cutting depth and feed engagement fz, radial cutting depth ae, tool radius rtoolBetween relation：
The 103 cutting force peak Fs gathered using dynamometer (1)max, draw the cutting force k of unit areac, i.e. minuteness milling
Unit cutting force computation model reaches formula：
Wherein apRepresent the axial cutting depth in working angles；
2. keeping axial cutting depth constant, regulation sliding support transverse slat and then change radial cutting depth value, obtain not
Unit cutting force under same cutting parameter, obtains the relation and record between Unit cutting force and cutting data：
201 are grouped machining, machining is highly equal to axial cutting depth ap, radial cutting depth from
0 is incremented by 0.1mm；
Record cutting force data in 202 working angles in real time with dynamometer, the acquisition and unit for cutting force peak value are cut
Cut the calculating of power；3. the data based on record, cutting parameter optimization is carried out with the method for fuzzy logic：
301 draw the change curve of Unit cutting force according to the data of record, and are determined by its derivative value on curve
Catastrophe point, i.e. cutting occur after such a point, and the change of Unit cutting force sharply increases, and defines the cutting depth corresponding to the point
For limit cutting depth；
The record data of 302 pairs of different groups is handled according to step 301, is obtained under different cutting parameter combinations
Limit cutting depth；
303 represent the data of record the matching degree of set with a numerical value degree of membership between 0 and 1,
And the blurring instrument of triangle and trapezoidal membership function as parameter is selected, complete the Fuzzy processing of input variable；
The logical calculated of 304 ambiguity in definition rule, each fuzzy rule use " IF-THEN " sentence, and different is fuzzy
Connected between rule using " AND " sentence, establish the fuzzy logic forecast model of minimum cutting depth；
305, using cutting speed and feed engagement as input variable, using minimum cutting depth as output variable, use
Regional center de-fuzzy method carries out de-fuzzy operation to the output variable under semantic description state, completes going for result of calculation
Blurring；
4. reverse goes out the radial cutting depth of the limit, radial cutting depth formula is utilized：
Further optimization to radial direction cutting depth；A in formulae' for optimization radial cutting depth, rtoolTool radius,
hm' minimum cutting depth predicted value under given cutting speed and feed engagement, fzFeed engagement.
The precision of the fuzzy logic model uses formula：
Calculate, wherein hm" represent the minimum cutting depth calculated value that is calculated, hm' represent given cutting speed and per tooth
Minimum cutting depth predicted value under the amount of feeding, N represent test number (TN).
The positive effect of the present invention is as follows：Position of the present invention by adjustment support transverse slat on hanging pillar, and by reading
Scale determines actual processing position, highly shortened clamping adjustment time, makes operation more convenient；Present invention support transverse slat is protected
Leave certain angle, in that context it may be convenient to meet the adjustment of radial cutting depth, improve operating efficiency；Because of micro-cutting process shadow
The factor of sound is numerous, and some negligible factors in macro-scale cutting all can produce very big shadow to micro-cutting process
Ring, the presence of especially scale effect is the important difference of macroscopic view cutting and micro-cutting, in the premise that cutter and material determine
Under, the reasonable selection of cutting parameter is for avoiding scale effect from having great importance；Cutting parameter of the present invention is excellent
Change method has good versatility, can be used for different cutters and different materials, by reasonably Adjustment Tests platform,
Material removal amount of the workpiece in each cutting can be easily controlled, can by the cutting force data and series of computation of record
Obtain corresponding Unit cutting force under different radial cutting depth；The present invention is based on different cutting parameters and corresponding unit
The minimum cutting depth forecast model that cutting force can be established under particular tool and material, when cutting parameter changes, based on this
Model can obtain corresponding optimal radial cutting depth under new operating mode, realize effective control of Unit cutting force, for improving
Crudy, reduce the generation of cutting heat and improve cutter life being respectively provided with important meaning.
Brief description of the drawings
Fig. 1 is machine table structural representation of the present invention；
Fig. 2 is hanging pillar structural representation of the present invention；
Fig. 3 is riser structural representation of the present invention；
Fig. 4 is present invention support transverse slat structural representation；
Fig. 5 is coordinate system schematic diagram of the present invention；
Fig. 6 is the maximum non-cutting depth schematic diagram of the present invention；
Fig. 7 is radial cutting depth schematic diagram of the present invention；
Fig. 8 is Unit cutting force changing rule schematic diagram of the present invention；
Fig. 9 determines schematic diagram for the minimum cutting depth of the present invention；
Figure 10 is the schematic diagram of cutting speed of the present invention and degree of membership；
Figure 11 is the schematic diagram of feed engagement of the present invention and degree of membership；
Figure 12 is the minimum cutting depth of the present invention and the schematic diagram of degree of membership；
Figure 13 is model prediction accuracy schematic diagram of the present invention；
Figure 14 is the 2nd group of Unit cutting force control effect schematic diagram of the invention；
Figure 15 is the 5th group of Unit cutting force control effect schematic diagram of the invention；
Figure 16 is the 8th group of Unit cutting force control effect schematic diagram of the invention；
Figure 17 is forecast model output parameter value schematic diagram of the present invention；
In figure：1 dynamometer, 2 pressing plates, 3 machine tables, 4 risers, 5 supporting cases, 6 hanging pillars, 6-1 dovetail grooves, 7 support transverse slats,
7-1 dovetail slide blocks, 8 clamping slots, 9 tight fixed bolts, W are the scale label on hanging pillar, and a is radial cutting depth, and b is 2mm milling cutters
Unit cutting force, c are unit cutting force, and d is the minimum cutting-in predicted value based on fuzzy logic model, e be based on experiment most
Small cutting-in calculated value, f are second group of cutting test Unit cutting force in table 5, and first group of cutting test unit in g tables 6 is cut
Cut power, the 5th group of cutting test Unit cutting force in h tables 5, second group of cutting test Unit cutting force in l tables 6, in j tables 5
The 8th group of cutting test Unit cutting force, the 3rd group of cutting test Unit cutting force in k tables 6, the material that W1 will be removed
Material, the excursion of Unit cutting force when W4 cutting depth is 0.0247, Unit cutting force when W5 cutting depth is 0.0283
Excursion, the excursion of Unit cutting force when W6 cutting depth is 0.0650.
Embodiment
The present invention is described in detail with instantiation below in conjunction with the accompanying drawings.
First, the embodiment of apparatus of the present invention：
Embodiment 1
As shown in Figure 1,2,3, 4, it is a kind of to become cutting-depth adjusting device, including be arranged on platen dynamometer 1, pressure
Plate 2 and machine table 3, the machine table 3 are arranged on dynamometer 1 by pressing plate 2；Also include riser 4, supporting case 5, hanging pillar 6,
Tight fixed bolt 9 is vertically set on the upper front part of machine table 3 with support transverse slat 7, the riser 4；The supporting case 5 is vertically set on
The middle part of riser 4, the hanging pillar 6 is provided with dovetail groove 6-1 and scale marks, and the hanging pillar 6 is located inside supporting case 5, and vertically
In riser 4；The support transverse slat 7 is provided with dovetail slide block 7-1, and the support transverse slat 7 is arranged in supporting case 5 perpendicular to riser 4
Portion, and be slidably connected by dovetail slide block 7-1 and dovetail groove 6-1 cooperation and the composition of hanging pillar 6, support transverse slat 7 upper end is set
There is clamping slot 8, the tight fixed bolt 9 is in contact through supporting case 5 with support transverse slat 7；The support transverse slat 7 is in a rectangular trapezoid,
The support upper sideline of transverse slat 7 forms angle beta with horizontal line, and the span of the angle beta is 3 °~7 °.The tight fixed bolt
9 are arranged in pairs, and are symmetrically distributed in support transverse slat 7 both sides.
Clamping slot 8 carries out pretension, firmly beforehand meanses and branch after clamping workpiece using corresponding tight fixed bolt in the present invention
The firmly beforehand meanses for supportting transverse slat 7 are consistent.
Heretofore described support transverse slat 7 is in a rectangular trapezoid, and the support upper sideline of transverse slat 7 forms angle with horizontal line
β, the angle beta need to choose according to different processing, and selection range is 3 °~7 °, 10 °~15 °, 4 ° and 12 °.
The cross section of machine table 3 of the present invention is in I-shaped.
2nd, the embodiment of the inventive method：
Embodiment：
1. determine minuteness milling Unit cutting force computation model：
101 are fixed to workpiece in clamping slot (8), sliding support transverse slat (7), transverse slat will be supported by tight fixed bolt (9)
(7) it is fixed, read the initial manufacture scale on hanging pillar (6) and record；
102 as shown in Figure 5,6, circle O1The milling cutter profile of (milling cutter turns over 180 °), O in upper one cutting cycle2To be current
Cut the milling cutter profile in cycle.To justify O1The center of circle establish coordinate system, O for origin1O2For feed engagement, using PQR as summit
Regional Representative cuts removed material every time, and for milling, cutting depth is all continually changing, wherein in the presence of one
Peak value, line segment PQ approximate representations can be used in figure, referred to as maximum non-cutting depth, be denoted as hmax, when the value of measuring is relative to knife
When having radius very little, ∠ RQP approximations can regard 90 ° as, now, maximum non-cutting depth and feed engagement, radial cutting depth,
Meet following relation between tool radius：
In above formula, fzFor feed engagement, rtoolFor tool radius, aeFor radial cutting depth, formula (1) is disclosed in knife
In the case that tool determines, maximum non-cutting depth and feed engagement and radial cutting depth aeIt is relevant.
103 for one is cut the cycle, and cutting force can show " first sharply increasing the state slowly reduced afterwards ", profit
The cutting force peak F gathered with dynamometer (1)max, when cutting edge starts a cut through workpiece material, cutting force can steeply rise, and reach
After to a peak value can with a less rate reduction, peak value cutting force when occurring corresponding non-cutting depth be approximately equal to most
Big non-cutting depth, is represented with PQ lines in Fig. 6.Use apThe axial cutting depth in working angles is represented, then unit area is cut
Power can be calculated as follows：
Wherein, Unit cutting force kcRepresent, be herein the main cutting force in the unit area of cut, FmaxFor certain cutting week
Peak value cutting force in phase, hmaxFor the non-cutting depth of maximum in working angles.Based on above-mentioned model when axial cutting depth is protected
When holding constant, unit area cutting force is relevant with peak value cutting force and maximum non-cutting depth, and maximum non-cutting depth is to close
In the function of radial cutting depth, therefore, in the case where cutting speed and the amount of feeding keep constant by changing radial cutting
Depth value changes the non-cutting depth of maximum in working angles.
2. keeping axial cutting depth constant, regulation sliding support transverse slat (7) and then change radial cutting depth value, obtain
Unit cutting force under different cutting parameters, obtain the relation and record between Unit cutting force and cutting data：
201 is make optimization method have more generality, and the present invention is more by cutting point by the way of radial direction cutting depth is become
Secondary progress, cutting parameter used in cutting is different every time, but the material volume removed is identical, is that a height is equal to axle
To cutting depth ap, the radial cutting depth wedge shape incremental from 0 to 0.1mm, as shown in fig. 7, cutting ginseng selected in experiment
Number is as shown in table 1.
During being gradually reduced with radial cutting depth, gradually increased trend is presented in Unit cutting force, such as Fig. 8,9
It is shown, and since a certain position, the speedup of Unit cutting force is substantially accelerated, i.e., and Unit cutting force change curve has one
Critical point, when radial cutting depth be less than the critical point at corresponding to cutting depth when, Unit cutting force sharply increases.
With the force data of record cutting in real time of dynamometer 1 in 202 working angles, acquisition and unit for cutting force peak value are cut
Cut the calculating of power.
3. the data based on record, cutting parameter optimization is carried out with the method for fuzzy logic：
According to Unit cutting force acquisition methods can obtain the changing rule of Unit cutting force under different tests group, unit
A more obvious turning point on the change curve of cutting force be present, when cutting occurs after such a point, Unit cutting force
Change sharply increase, therefore, cutting depth corresponding at the point can be regarded as limit cutting depth, in order to avoid serious
Scale effect occurs, and during actual processing, cutting depth parameter should be more than revaluate.
301 draw the change curve of Unit cutting force according to the data of record, and are determined by its derivative value on curve
Catastrophe point, i.e. cutting occur after such a point, and the change of Unit cutting force sharply increases, and defines the cutting depth corresponding to the point
For limit cutting depth；
Each group test data in 302 pairs of tables 1 carries out above processing, you can obtains the pole under different cutting parameter combinations
Cutting depth is limited, as a result as shown in table 2.
The cutting test parameter of table 1
The minimum cutting depth of each group of table 2 cutting
303 represent the data of record the matching degree of set with a numerical value degree of membership between 0 and 1,
As shown in table 3, and from the blurring instrument of triangle and trapezoidal membership function as parameter, the fuzzy of input variable is completed
Change is handled, and is segmented the membership function of each parameter of completion as shown in Figure 10,11,12.
The segmentation of the input/output argument of table 3 and semantic meaning representation
304 define the logical calculated of dependent blur rule, and each fuzzy rule uses " IF-THEN " sentence, different
Connected between fuzzy rule using " AND " sentence, establish the fuzzy logic forecast model of minimum cutting depth, as shown in table 4；
Table 4 uses the fuzzy rule of semantic meaning representation
305, using cutting speed and feed engagement as input variable, using minimum cutting depth as output variable, use
Regional center de-fuzzy method has carried out de-fuzzy operation to the output variable under semantic description state, completes result of calculation
De-fuzzy.
4. the minimum cutting depth prediction result reverse under being combined according to different parameters goes out the radial cutting depth of the limit, profit
With radial cutting depth formula：
Further optimization to radial direction cutting depth；A in formulae' for optimization radial cutting depth, rtoolTool radius, hm
' the minimum cutting depth predicted value under given cutting speed and feed engagement, fzFeed engagement.
In order to verify the reliability of above-mentioned fuzzy logic model, cutting speed and feed engagement all randomly select,
Fuzzy logic model based on foundation can obtain the predicted value of minimum cutting depth, selected cutting parameter, based on fuzzy
The minimum cutting depth predicted value of logical model and actual calculated value are as shown in table 5.
The predicted value and actual value of 5 minimum cutting depth of table
As shown in figure 13, the minimum cutting depth predicted value based on fuzzy logic model and the reality obtained according to confirmatory experiment
Border measured value is contrasted.
Use hm" the minimum cutting depth calculated value that is calculated based on test data is represented, use hm' represent given cutting speed
Minimum cutting depth predicted value under degree and feed engagement, N represent test number (TN), then the minimum obtained using above method is cut
Cutting depth prediction precision can be calculated as follows：The precision of model is calculated
Up to 96.4%.
When radial cutting depth is less than ae' when can produce larger Unit cutting force, therefore, during actual processing, cut
The value should be more than by cutting the value of depth.In order to verify the feasibility using above-mentioned optimization method, further carry out a series of
The proving test of constant cut depth, in addition to radial cutting depth, the cutting parameter during experiment and the 2nd, 5 in table 5
It is identical with 8 groups, it is shown in Table 6.
The checking test of the Unit cutting force of table 6 control
Six points have been randomly selected in cutting process, and the Unit cutting force at these points has been calculated, have been
It is easy to compare the Unit cutting force control effect in checking test, herein by the 2nd in table 5,5 and 8 groups of Unit cutting force
Changing rule is contrasted respectively at the Unit cutting force in table 6, as a result as shown in Figure 14,15,16.And obtain final prediction
Model exports height value, as shown in figure 17.
In the cutting test carried out using the radial cutting depth of optimization, Unit cutting force is small without acute variation, and
Unit cutting force value at the turning point on each control group Unit cutting force change curve.It is excellent using above radial cutting depth
Change method can realize well control Unit cutting force purpose, this for improve crudy, suppress the generation of cutting heat,
It is all highly important to improve cutter life etc..
Embodiment described above is only the preferred embodiments of the present invention, and the simultaneously exhaustion of the feasible implementation of non-invention.It is right
For persons skilled in the art, on the premise of without departing substantially from the principle of the invention and spirit to any aobvious made by it and
The change being clear to, it should all be contemplated as falling with the claims of the present invention.
Claims (4)
1. one kind becomes cutting-depth adjusting device, including dynamometer (1), pressing plate (2) and the machine table being arranged on platen
(3), it is characterised in that：The machine table (3) is arranged on dynamometer (1) by pressing plate (2)；
It is vertical also to include riser (4), supporting case (5), hanging pillar (6), tight fixed bolt (9) and support transverse slat (7), the riser (4)
It is arranged on machine table (3) upper front part；The supporting case (5) is vertically set in the middle part of riser (4), and the hanging pillar (6) is provided with swallow
Stern notch (6-1) and scale mark, the hanging pillar (6) is internal located at supporting case (5), and perpendicular to riser (4)；The support is horizontal
Plate (7) is provided with dovetail slide block (7-1), and the support transverse slat (7) is arranged on supporting case (5) inside perpendicular to riser (4), and passes through
The cooperation of dovetail slide block (7-1) and dovetail groove (6-1) is formed with hanging pillar (6) and is slidably connected, and described support transverse slat (7) upper end is provided with
Clamping slot (8), the tight fixed bolt (9) are in contact through supporting case (5) with support transverse slat (7)；
The support transverse slat (7) is in a rectangular trapezoid, and support transverse slat (7) upper sideline forms angle beta, the angle with horizontal line
β span is 3 °~7 °.
A kind of 2. change cutting-depth adjusting device according to claim 1, it is characterised in that：The tight fixed bolt (9) sets in pairs
Put, and be symmetrically distributed in described support transverse slat (7) both sides.
3. carry out radial cutting parameter optimization process using the device described in claim 1, it is characterised in that step is as follows：
1. determine minuteness milling Unit cutting force computation model：
101 are fixed to workpiece in clamping slot (8), sliding support transverse slat (7), by tight fixed bolt (9) transverse slat (7) will be supported solid
It is fixed, read the initial manufacture scale label on hanging pillar (6) and record；
The 102 milling cutter profiles established in a cutting cycle and the milling cutter profile coordinate system in current cutting cycle, record are each
Peak value when the removed material of cutting and cutting depth constantly change, and maximum non-cutting depth is defined as, it is denoted as hmax,
It is determined that maximum non-cutting depth and feed engagement fz, radial cutting depth ae, tool radius rtoolBetween relation：
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The 103 cutting force peak Fs gathered using dynamometer (1)max, draw the cutting force k of unit areac, i.e. minuteness milling unit
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<msub>
<mi>F</mi>
<mi>max</mi>
</msub>
<mrow>
<msub>
<mi>a</mi>
<mi>p</mi>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>h</mi>
<mi>max</mi>
</msub>
</mrow>
</mfrac>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>F</mi>
<mrow>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
<mo>&CenterDot;</mo>
<msqrt>
<mrow>
<msup>
<msub>
<mi>r</mi>
<mrow>
<mi>t</mi>
<mi>o</mi>
<mi>o</mi>
<mi>l</mi>
</mrow>
</msub>
<mn>2</mn>
</msup>
<mo>-</mo>
<mn>2</mn>
<msub>
<mi>f</mi>
<mi>z</mi>
</msub>
<msqrt>
<mrow>
<mn>2</mn>
<msub>
<mi>r</mi>
<mrow>
<mi>t</mi>
<mi>o</mi>
<mi>o</mi>
<mi>l</mi>
</mrow>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>a</mi>
<mi>e</mi>
</msub>
<mo>-</mo>
<msubsup>
<mi>a</mi>
<mi>e</mi>
<mn>2</mn>
</msubsup>
</mrow>
</msqrt>
<mo>+</mo>
<msup>
<msub>
<mi>f</mi>
<mi>z</mi>
</msub>
<mn>2</mn>
</msup>
</mrow>
</msqrt>
</mrow>
<mrow>
<msub>
<mi>a</mi>
<mi>p</mi>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>f</mi>
<mi>z</mi>
</msub>
<mo>&CenterDot;</mo>
<mrow>
<mo>(</mo>
<msqrt>
<mrow>
<mn>2</mn>
<msub>
<mi>r</mi>
<mrow>
<mi>t</mi>
<mi>o</mi>
<mi>o</mi>
<mi>l</mi>
</mrow>
</msub>
<mo>&CenterDot;</mo>
<msub>
<mi>a</mi>
<mi>e</mi>
</msub>
<mo>-</mo>
<msubsup>
<mi>a</mi>
<mi>e</mi>
<mn>2</mn>
</msubsup>
</mrow>
</msqrt>
<mo>-</mo>
<msub>
<mi>f</mi>
<mi>z</mi>
</msub>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein apRepresent the axial cutting depth in working angles；
2. keeping axial cutting depth constant, regulation sliding support transverse slat (7) and then change radial cutting depth value, difference is obtained
Cutting parameter under Unit cutting force, obtain the relation and record between Unit cutting force and cutting data：
201 are grouped machining, machining is highly equal to axial cutting depth ap, radial cutting depth from 0 to
0.1mm is incremented by；
With dynamometer (1) force data of record cutting in real time in 202 working angles, acquisition and unit cutting for cutting force peak value
The calculating of power；
3. the data based on record, cutting parameter optimization is carried out with the method for fuzzy logic：
301 draw the change curve of Unit cutting force according to the data of record, and the mutation on curve is determined by its derivative value
Point, i.e. cutting occur after such a point, and the change of Unit cutting force sharply increases, and it is pole to define the cutting depth corresponding to the point
Limit cutting depth；
The record data of 302 pairs of different groups is handled according to step 301, obtains the limit under different cutting parameter combinations
Cutting depth；
303 represent the data of record the matching degree of set with a numerical value degree of membership between 0 and 1, and select
By the use of triangle and trapezoidal membership function as the blurring instrument of parameter, the Fuzzy processing of input variable is completed；
304 define the logical calculated of dependent blur rule, and each fuzzy rule uses " IF-THEN " sentence, and different is fuzzy
Connected between rule using " AND " sentence, establish the fuzzy logic forecast model of minimum cutting depth；
305 using cutting speed and feed engagement as input variable, using minimum cutting depth as output variable, using region
Center de-fuzzy method has carried out de-fuzzy operation to the output variable under semantic description state, and that completes result of calculation removes mould
Gelatinization；
4. the minimum cutting depth prediction result reverse under being combined according to different parameters goes out the radial cutting depth of the limit, footpath is utilized
To cutting depth formula：
Further optimization to radial direction cutting depth；A in formulae' for optimization radial cutting depth, rtoolTool radius, hm' give
Determine the minimum cutting depth predicted value under cutting speed and feed engagement, fzFeed engagement.
4. radial cutting parameter optimization process according to claim 3, it is characterised in that：The step fuzzy logic
The precision of model uses formula：
<mrow>
<mi>A</mi>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mi>N</mi>
</mfrac>
<munderover>
<mo>&Sigma;</mo>
<mn>1</mn>
<mi>N</mi>
</munderover>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mfrac>
<mrow>
<mo>|</mo>
<msubsup>
<mi>h</mi>
<mi>m</mi>
<mo>&prime;</mo>
</msubsup>
<mo>-</mo>
<msup>
<msub>
<mi>h</mi>
<mi>m</mi>
</msub>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
<mo>|</mo>
</mrow>
<mrow>
<msup>
<msub>
<mi>h</mi>
<mi>m</mi>
</msub>
<mrow>
<mo>&prime;</mo>
<mo>&prime;</mo>
</mrow>
</msup>
</mrow>
</mfrac>
<mo>)</mo>
</mrow>
<mo>&times;</mo>
<mn>100</mn>
<mi>%</mi>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>4</mn>
<mo>)</mo>
</mrow>
</mrow>
Calculate, wherein hm" represent the minimum cutting depth calculated value that is calculated, hm' represent given cutting speed and per tooth feeding
Minimum cutting depth predicted value under amount, N represent test number (TN).
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