CN105643024A - Axial layered cutting method for turning coarse-pitch threads, tool wear testing method and force-heat load calculating method of tool wear - Google Patents
Axial layered cutting method for turning coarse-pitch threads, tool wear testing method and force-heat load calculating method of tool wear Download PDFInfo
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- CN105643024A CN105643024A CN201610151080.XA CN201610151080A CN105643024A CN 105643024 A CN105643024 A CN 105643024A CN 201610151080 A CN201610151080 A CN 201610151080A CN 105643024 A CN105643024 A CN 105643024A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/44—Equipment or accessories specially designed for machines or devices for thread cutting
- B23G1/50—Equipment or accessories specially designed for machines or devices for thread cutting for cutting thread by successive operations
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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
- 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
- B23Q15/18—Compensation of tool-deflection due to temperature or force
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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
- B23Q17/0995—Tool life management
Abstract
The invention discloses an axial layered cutting method for turning coarse-pitch threads, a tool wear testing method and a force-heat load calculating method of tool wear for eliminating principle errors caused by radial layered cutting of the coarse-pitch threads. The axial layered cutting method for turning the coarse-pitch threads, the tool wear testing method and the force-heat load calculating method of tool wear are technically characterized in that through the cutting method, a testing tool with a left cutting edge and a right cutting edge is used for axially turning a left thread surface and a right thread surface of a coarse-pitch test piece in a layered mode, wear tests of the tool turning the coarse-pitch threads are conducted through the cutting method, the wear pattern of the tool turning the coarse-pitch threads is obtained, the influence of tool wear on thread machining surfaces is revealed, then a finite element analytical model of the tool is reconstructed according to the flank wear data of the tool and the blunt round radius measurement data of the cutting edges, analysis and calculation of the temperature field and the stress field of the tool are carried out, and the force-heat load change characteristic on the tool wear condition is obtained.
Description
Technical field:
The present invention relates to a kind of steep-pitch thread method for turning and tool wear, the test of power thermal force, computational methods, it is specifically related to a kind of steep-pitch thread axial stratification method for turning, the experiment of turning steep-pitch thread tool wear, method of testing, and the power thermal force analytical model of tool wear builds, computational methods.
Background technology:
Large-lead screw adjusts assembly as large pressing machine, controls the depth of parallelism between mold and lower mold and perpendicularity, static state and the dynamic accuracy important to forcing press complete machine in a press. Existing steep-pitch thread turning mainly adopts radially layered cutting process, and the method adopts point of a knife to cut, and by the positional precision of control point of a knife to form steep-pitch thread surface, has advantages such as being prone to NC Machining Program. But, this cutting way is to adopt point of a knife close approximation principle, and the flank of formation exists original reason error, it is difficult to meet steep-pitch thread high accuracy, great surface quality requirement. Axial stratification cutting is then utilize Tool in Cutting sword to be shaped cutting, the flank of its formation is absent from original reason error, existing multitask cutting is become single task cutting by the method, cut by axial stratification, ensure thread size precision, tooth form precision and teaching and administrative staff's surface quality respectively. Therefore, this cutting process eliminates the original reason error that radial cutting exists, and is particularly suited for the cutting of high accuracy steep-pitch thread.
When adopting axial stratification cutting process polish steep-pitch thread, if removing whole allowance for finish by cutting at one time, the cutting force of generation is relatively big, affects machined surface quality and machining accuracy; For improving machining accuracy; And when adopting axial repeatedly layered cutting method polish steep-pitch thread, cutting number of times is too much, tool wear can be made to aggravate.
In steep-pitch thread working angles, between power thermal force and tool wear, there is reciprocal action relation; Cutter constantly and workpiece, chip contact, has significantly high cutting temperature and pressure in contact area, and this power thermal force that cutter is subject to is the main cause causing its abrasion;Meanwhile, tool wear can cause again the change of its power thermal force; At present, research for tool wear is concentrated mainly on the impact for tool wear of the power thermal force, ignore the tool wear impact on power thermal force, the cutter power thermal force analytical model and the boundary condition that adopt are the model under Tool in Cutting original state and data, cannot correctly obtain the variation characteristic that power thermal force increases and tool abrasion increases with cutting stroke, axially repeatedly Shortcomings in layering turning steep-pitch thread tool wear experimental technique and power thermal force computational methods.
Summary of the invention:
The present invention eliminates the original reason error that radially layered cutting steep-pitch thread exists, a kind of turning steep-pitch thread axial stratification cutting process of design, and adopt the method to carry out the test of turning steep-pitch thread tool wear, obtain turning steep-pitch thread tool wear form, disclose tool wear screw thread process surface is affected, recycling cutter wear of the tool flank and rounded cutting edge radius measurement data, rebuild cutter finite element analysis model, carry out Tools Temperature Field and analysis on Stress Field, calculate, obtain tool wear condition to exert oneself sum of any pressure drop variations characteristic.
The turning steep-pitch thread axial stratification cutting process of the present invention, the technical scheme adopted for achieving the above object is in that to comprise the following steps:
One, the left and right flank of the test big pitch test specimen of cutter layering turning vertically with two cutting edges in left and right is adopted;
Two, radially cutting depth a in each feed process of cutter during turningPConstant and equal to form of thread height H, cutting lay area is only relevant with the depth of cut, shown in its relationship between variables such as formula (1),
H > H=aP, ��r1=��r1', ��r2=��r2', B > b, R1=r1, R2=r2(1)
Left sword cutting time cutting layer thickness and cutting lay width:
hDl=zli��sink����(2)
bDl=zli/sink����(3)
Its each time the desired cut aspect of layered cutting amass and be:
Si=hDl��bDl=zli��sink���䡤(aP/sink��')=zli��aP(4)
In like manner, during the cutting of right sword, the cutting lay area of layered cutting is each time:
Sj=hDr��bDr=zrj��sink���䡤(aP/sink��')=zrj��aP(5)
In formula, H is height of thread, and h is the cutter head height of cutter, and B is ridge bottom width, and b is cutter head width; aPFor radial direction cutting-in, zliFor left sword single process surplus, zrjFor right sword single process surplus, i is left sword cutting number of times, and j is right sword cutting number of times; hDlCutting layer thickness during sword turning left for cutter, bDlCutting lay width during sword turning left for cutter, hDrCutting layer thickness during sword turning right for cutter, bDrCutting lay width during sword turning right for cutter; SiFor left cutting edge cutting lay area, SjFor right cutting edge cutting lay area; ��r1����r2The respectively left and right tooth side angle of screw thread, ��r1' for the left sword side angle of cutter, ��r2' for the right sword side angle of cutter; R1��R2The respectively tooth form radius of test specimen left and right side, r1��r2Left and right cusp arc radius for cutter.
The method of testing of the axial stratification turning steep-pitch thread tool wear of the present invention, the technical scheme of employing is in that to comprise the following steps:
One, by the process of the cutting process turning steep-pitch thread test specimen described in claim 1, test cutter is taken off respectively when cutting stroke is 15072mm, 52752mm, 94200mm, 116808mm and 139400mm, utilize the VHX-1000 super depth of field three-dimensional microscopic system detection forward and backward knife face wear morphology of cutter the cutting edge arc radius of experiment with measuring cutter and tool flank wear;
Two, along test tool length direction, take cutting stroke 5 sections identical, measure the wear of the tool flank width testing cutter under 5 sections of cutting strokes respectively, it is thus achieved that the change curve of the wear of the tool flank width of test cutter;
Three, on the change curve of the wear of the tool flank width of test cutter, by the difference of the radius of edge of test cutter and knife face abrasion width rate of change thereafter, mark off and test initial wear, normal wear and the sharp wear three phases experienced in cutter turning steep-pitch thread test specimen process;
Four, the machined surface pattern of steep-pitch thread test specimen in three phases in measuring process three, utilize the tool wear form under identical cutting stroke and the machined surface pattern of corresponding steep-pitch thread test specimen, detect that the machined surface pattern on steep-pitch thread test specimen that increases of test tool abrasion affects the upper difference existed.
Further, described steep-pitch thread test specimen is pitch be 16mm, external diameter is 120mm, and length is the trapezoidal dextrorotation external screw rod test specimen of 160mm, and its material is 35CrMo.
Further, the left and right sword angle of described test cutter is 26 ��, top relief angle is the cutting edge inclination of 5 ��, two cutting edges and anterior angle be 0 ��, relief angle be 5 ��, left sword radius of edge be 138.77mm, left sword radius of edge be 201.56mm, its material is W18Cr4v.
Further, steep-pitch thread test specimen is carried out turning with rotating speed 10rpm, axial allowance 0.05mm by described test cutter on CA6140 lathe.
The computational methods carrying out axial stratification turning steep-pitch thread tool wear heating power load of the present invention, the technical scheme adopted is in that: by the arc radius after the forward and backward knife face wear data of the test cutter obtained and cutting edge and corner wear, Deform computed in software is adopted to go out to test the cutting temperature under cutter difference tool wear form and cutting force, using the cutting temperature calculated and cutting force as the boundary condition of analysis on Stress Field, adopt the maximum stress under Ansys computed in software test cutter difference state of wear.
Further, the wearing depth of test cutter is calculated by formula (5):
��=�� apve-b/Tdt(6)
In formula, p to be normal pressure, v the be chip sliding velocity chip relative to test cutter is test coefficient for test cutter with chip contact district temperature, a, d relative to cutter, T, and material takes a of acquiescence, d value;
Further, adopt Deform software to obtain the Thermal-mechanical Coupling field of cutter difference wear stage, be perpendicular to the vertical line d of the left cutting edge of test cutter in Thermal-mechanical Coupling field temperature highest position2', intersection point is d to the distance of point of a knife1', utilize point of a knife, d1' and d2' test cutter maximum temperature position is depicted, extract the accurate location of the test most temperature of cutter and test cutter and chip contact district maximum temperature, extract this position test cutter rake face temperature and test cutter and the chip contact district time dependent curve of temperature, extract each wear stage maximum temperature of cutter, obtain test tool temperature with knife face abrasion width change curve thereafter.
The invention has the beneficial effects as follows: the steep-pitch thread axial stratification cutting process that the present invention proposes is to utilize Tool in Cutting sword to be shaped cutting, the flank formed is absent from original reason error, the method is cut by axial stratification, single task cutting has been resolved in existing multitask cutting, cut by axial stratification, ensure thread size precision, tooth form precision and teaching and administrative staff's surface quality respectively, therefore, this cutting process eliminates the original reason error that radial cutting exists, and is particularly suited for the cutting of high accuracy steep-pitch thread; Tool wear provided by the invention experiment and power thermal force computational methods thereof, disclose the impact that the power thermal force in its working angles is distributed by the cutting edge after tool wear and rear knife face structural change, tool wear can be calculated by the initial wear stage to middle and late stage wear stage, cutter stress and cutter and chip contact district temperature rate of rise, disclose cutter middle and late stage wear stage;The power thermal force computational methods of the tool wear that the present invention proposes, utilize cutter front and rear knife face abrasion length, width, the degree of depth acquired in the experiment of turning steep-pitch thread, the tool wear data such as the arc radius after cutting edge and corner wear, revise cutter finite element analysis model, the turning steep-pitch thread stress field obtained and temperature field analysis, result of calculation, can be accurately positioned out in Tool Wear Process maximum stress and position that maximum temperature produces, provide foundation for Tool in Cutting sword structural design and high-efficient cutting technological design.
Accompanying drawing illustrates:
Fig. 1 is the contact relation schematic diagram of cutter and test specimen in axial stratification cutting;
Fig. 2 is the side view of Fig. 1;
Schematic diagram is widened on the left side that Fig. 3 is test cutter;
Schematic diagram is widened on the right side that Fig. 4 is test cutter;
The screw thread that Fig. 5 is test specimen launches schematic diagram;
Fig. 6 is the curve chart that test cutter wear of the tool flank width changes with cutting stroke;
Fig. 7 be test tool wear before with steep-pitch thread test specimen contact schematic diagram;
Fig. 8 be test tool wear after with steep-pitch thread test specimen contact schematic diagram;
Fig. 9 is for revising cutter model figure;
Figure 10 is test cutter FEM (finite element) model figure;
Figure 11 is the change curve of cutter maximum stress knife face abrasion width subsequently;
Figure 12 is that schematic diagram is extracted in maximum temperature position;
Figure 13 is the change curve of test tool temperature knife face abrasion width subsequently.
Detailed description of the invention:
Referring to figs. 1 through Fig. 5, this turning steep-pitch thread axial stratification cutting process, adopt the left and right flank of the cutter layering turning steep-pitch thread test specimen vertically with two cutting edges in left and right, in figure: n is workpiece rotational frequency, vfFor cutter axial feed velocity, vcFor main motion speed, between both, constitute orthogonal cartesian coordinate system; ��rFor cutter tool cutting edge angle, ��r�� is cutter auxiliary angle, ��0For cutter front clearance, ��0For tool orthogonal rake, �� is the lead angle of test specimen, ��r1����r2The respectively left and right tooth side angle of screw thread, ��r1' for the left sword side angle of cutter, ��r2' for the right sword side angle of cutter; D is the external diameter of test specimen, d1For the path of test specimen, d2For the central diameter of test specimen, dwFor test specimen in working angles, H is height of thread, and h is the cutter head height of cutter, and B is ridge bottom width, and b is cutter head width; apFor radial direction cutting-in, zliFor left sword single process surplus, zrjFor right sword single process surplus (wherein i=1,2 ... n, j=1,2 ... m), hDlCutting layer thickness during sword turning left for cutter, bDlCutting lay width during sword turning left for cutter, hDrCutting layer thickness during sword turning right for cutter, bDrCutting lay width during sword turning right for cutter; P is test specimen pitch, R1��R2The respectively tooth form radius of test specimen left and right side, r1��r2Left and right cusp arc radius for cutter; PsFor cutting plane, PrFor basal plane, A��For cutter rake face, A��For knife face after cutter.
During turning steep-pitch thread test specimen, cutter in feed process each time, cutting-in apConstant and equal to form of thread height H, cutting lay area is only relevant with the depth of cut, and its relationship between variables is such as shown in following formula.
H > H=aP, ��r1=��r1', ��r2=��r2', B > b, R1=r1, R2=r2(1)
Left sword cutting time cutting layer thickness and cutting lay width:
hDl=zli��sink����(2)
bDl=zli/sink����(3)
Its each time the desired cut aspect of layered cutting amass and be:
Si=hDl��bDl=zli��sink���䡤(aP/sink��')=zli��aP(4)
In like manner, during the cutting of right sword, the cutting lay area of layered cutting is each time:
Sj=hDr��bDr=zrj��sink���䡤(aP/sink��')=zrj��aP(5)
The method Tool in Cutting sword in the whole course of processing both participates in cutting, is mainly used in semifinishing and the finishing passes of steep-pitch thread, and after its feed each time, the cutting edge length participating in cutting is constant, cutting to left and right sword cutting lay area S during cuttingi��SjWith cutting to left and right sword single process surplus zli��zrjWith radial direction cutting-in aPRelevant, it is significantly larger than radial cutting mode.Therefore, in working angles, cutter load subjected to is relatively large, directly affects accuracy of screw machining and machined surface quality.
The method of testing of turning steep-pitch thread tool wear;
According to above-mentioned cutting process, adopt the test cutter of cutting to left and right sword symmetrical structure, with rotating speed 10rpm on CA6140 lathe, axial allowance 0.05mm, carry out the experiment of turning steep-pitch thread tool wear, the material of steep-pitch thread test specimen used is modified 35CrMo, and the material of test cutter used is W18Cr4v, and tool geometry angle is as shown in table 1;
Table 1 tool geometry angle
In experiment, cutter head is taken off respectively when cutting stroke is 15072mm, 52752mm, 94200mm, 116808mm and 139400mm, utilize the VHX-1000 super depth of field three-dimensional microscopic system detection forward and backward knife face wear morphology of cutter, and measure cutting edge arc radius and tool flank wear.
The cutting edge of test cutter and wear of the tool flank experimental result:
Test Tool advance 4 times, when cutting stroke is 15.072m, when after rounded cutting edge radius and the right side, knife face is from point of a knife 3.6��5.4mm place, cutter wear of the tool flank form is abrasive wear, rounded cutting edge radius is 30.82 ��m, and cutter wear of the tool flank width is 94.57 ��m. Cutter is in this stage, thereafter knife face abrasion width and the change of cutting edge circular arc are very fast, and its reason is that after the new cutter sharpened, knife face exists rough part, and cutting edge is sharp, rear knife face is less with the finished surface contact area of steep-pitch thread test specimen, and compressive stress is bigger. Meanwhile, cutter plays pendulum in the cutting cutting blade structure at initial stage, tool assembly clamping and cutter work contact relation, and also Cutter wear has large effect.
Test Tool advance 21 times, when cutting stroke is 94.22m, when after rounded cutting edge radius and the right side, knife face is from point of a knife 3.6��5.4mm place, cutter knife face wear form after this stage is normal abrasive wear, rounded cutting edge radius is 52.13 ��m, and cutter wear of the tool flank width is 175.63 ��m. Compared with initial wear, front and rear knife face abrasion makes rounded cutting edge radius increase, and wear of the tool flank speed slows down. Its reason is Tool in Cutting sword and front and rear knife face uneven surface polishes, and cutting force is basicly stable with heat in metal cutting change, and amplitude of variation is less, and tool flank wear extended and proportional increase approx with the cutting time.
When test Tool in Cutting stroke reaches 139.4m, when after rounded cutting edge radius and the right side, knife face is from point of a knife 3.6��5.4mm place, rounded cutting edge radius is 69.37 ��m, wear of the tool flank width is 212.07 ��m, and there is breakage in Tool in Cutting sword, then there is bonding abrasion in rear knife face, during with cutting stroke 94.22m compared with tool wear, tool wear speed significantly increases.
Tool wear increases affects experimental result to steep-pitch thread test specimen machined surface pattern:
In turning steep-pitch thread is tested, choose 5 sections of identical cutting strokes and measure knife face abrasion width VB value respectively 94.58 ��m thereafter, 163.2 ��m, 175.6 ��m, 190.3 ��m and 240.7 ��m, obtain wear of the tool flank change width curve as shown in Figure 6, as seen from Figure 6, test cutter is in turning steep-pitch thread process, experienced by initial wear, normal wear and sharp wear three phases, significantly different at these three stage tool edge radius and wear of the tool flank change width speed, along with tool wear is aggravated, flank machined surface pattern generation significant change, tool wear is notable on the impact of machined surface quality, for obtaining satisfactory screw thread process surface, must take into the tool wear situation in working angles.
The power thermal force computational methods of tool wear:
The contact relation testing cutter and steep-pitch thread test specimen before and after tool wear is as shown in Figure 7 and Figure 8, be can be seen that by Fig. 7 and Fig. 8, Tool in Cutting sword geometry after abrasion has occurred and that change, the power thermal force distribution in its working angles can be directly affected, for this, utilize cutter front and rear knife face abrasion length acquired in the experiment of turning steep-pitch thread, width, the degree of depth, the tool wear data such as the arc radius after cutting edge and corner wear, revise cutter model as shown in Figure 9, utilize the measurement data that tool wear is tested, Deform and Ansys is adopted to calculate stress field and the temperature field of turning steep-pitch thread cutter difference state of wear, its boundary condition is as shown in table 2,
Table 2 boundary condition
The stress field calculation method of tool wear and result:
The stress of Ansys calculating machine structure, strain field is comparatively accurate, and Thermal-mechanical Coupling field that Deform calculates in working angles is comparatively accurate, for this, Deform and Ansys software is adopted to carry out the stress field cooperated computing under cutting-tool wear state, utilize the cutter tool flank wear that experiment obtains, the cutting temperature that rounded cutting edge radius and Deform calculate and the cutting force boundary condition as Ansys software finite element analysis, calculate cutter stress field, cutter FEM (finite element) model is as shown in Figure 10, cutter maximum stress is mainly distributed on cutting edge and the region adjacent with cutting edge and cutter front and rear knife face of cutter, along with being gradually increased of cutter wear of the tool flank width and rounded cutting edge radius, the maximum stress that cutter bears is gradually increased, and scope expands gradually, extend along cutting edge to the front and rear knife face of cutter, it is derived from cutter maximum stress as shown in figure 11 with knife face abrasion width variation characteristic curve chart thereafter.
The Calculation Method of Temperature Field of tool wear and result:
According to the computational methods of tool wear experimental result and Qi Li thermal force, adopting the Usui model being suitable for metal cutting, when carrying out the calculating of turning steep-pitch thread Tools Temperature Field, the computing formula of the tool wear degree of depth is:
��=�� apve-b/Tdt(6)
In formula, p is normal pressure; V is sliding velocity (chip is relative to cutter); T is cutter-bits contact area temperature; A, b are test coefficient, and material takes a, the b value of acquiescence.
Adopt Deform software to carry out the calculating of Thermal-mechanical Coupling field, extract the contact area temperature of test tool temperature and test cutter and chip, as shown in figure 12, calculate the accurate location of test cutter maximum temperature, as seen from Figure 12, excess temperature extreme higher position, it is perpendicular to the vertical line d of left cutting edge2', intersection point is d to the distance of point of a knife1', utilize point of a knife, d1' and d2' that cutter maximum temperature position is depicted is as shown in table 3:
Table 3 cutter maximum temperature position
The contact area temperature of test cutter and chip is higher than test cutter own temperature, test cutter is from incision steep-pitch thread test specimen, its temperature is all being gradually increased with test cutter and chip contact district temperature, plateau is reached after cutting a period of time, extract test each wear stage maximum temperature of cutter, obtain tool temperature knife face abrasion width change curve subsequently as shown in figure 13, as shown in Figure 13, test cutter is by the initial wear stage to middle and late stage wear stage, its temperature and test cutter add 12.3% and 15.7% with chip contact district temperature more previous wear stage temperature respectively, , 14.1% and 17.3%, 45.2% and 53.9%, test cutter middle and late stage wear stage, under heating power load combined effect, chip-load has exceeded test cutter yield strength and weldbonding effect, test cutter generation sticking and wearing and abrasion, and cause test cutter heating power load to increase further, add according to test tool wear process, until causing that test cutter is scrapped, and cause steep-pitch thread test specimen machined surface quality degradation.
Claims (8)
1. a turning steep-pitch thread axial stratification cutting process, it is characterised in that comprise the following steps:
One, the left and right flank of the test big pitch test specimen of cutter layering turning vertically with two cutting edges in left and right is adopted;
Two, radially cutting depth a in each feed process of cutter during turningPConstant and equal to form of thread height H, cutting lay area is only relevant with the depth of cut, shown in its relationship between variables such as formula (1),
H > H=aP, ����1=����1', ����2=����2', B > b, R1=��1, R2=��2(1)
Left sword cutting time cutting layer thickness and cutting lay width:
hDl=Zli��sink����(2)
bDl=Zli/sink����(3)
Its each time the desired cut aspect of layered cutting amass and be:
Si=hDl��bDl=Zli��sink���䡤(aP/sink��')=zli��aP(4)
During the cutting of right sword, the cutting lay area of layered cutting is each time:
Sj=hDr��bDr=Zrj��sink���䡤(aP/sink��')=Zrj��aP(5)
In formula, H is height of thread, and h is the cutter head height of cutter, and B is ridge bottom width, and b is cutter head width; aPFor radial direction cutting-in, zliFor left sword single process surplus, zrjFor right sword single process surplus, i is left sword cutting number of times, and j is right sword cutting number of times; hDlCutting layer thickness during sword turning left for cutter, bDlCutting lay width during sword turning left for cutter, hDrCutting layer thickness during sword turning right for cutter, bDrCutting lay width during sword turning right for cutter; SiFor left cutting edge cutting lay area, SjFor right cutting edge cutting lay area; ��r1����r2The respectively left and right tooth side angle of screw thread, ��r1' for the left sword side angle of cutter, ��r2' for the right sword side angle of cutter; R1��R2The respectively tooth form radius of test specimen left and right side, r1��r2Left and right cusp arc radius for cutter.
2. a cutting process according to claim 1 carries out the method for testing of axial stratification turning steep-pitch thread tool wear, it is characterised in that comprise the following steps:
One, by the process of the cutting process turning steep-pitch thread test specimen described in claim 1, test cutter is taken off respectively when cutting stroke is 15072mm, 52752mm, 94200mm, 116808mm and 139400mm, utilize the VHX-1000 super depth of field three-dimensional microscopic system detection forward and backward knife face wear morphology of cutter the cutting edge arc radius of experiment with measuring cutter and tool flank wear;
Two, along test tool length direction, take cutting stroke 5 sections identical, measure the wear of the tool flank width testing cutter under 5 sections of cutting strokes respectively, it is thus achieved that the change curve of the wear of the tool flank width of test cutter;
Three, on the change curve of the wear of the tool flank width of test cutter, by the difference of the radius of edge of test cutter and knife face abrasion width rate of change thereafter, mark off and test initial wear, normal wear and the sharp wear three phases experienced in cutter turning steep-pitch thread test specimen process;
Four, the machined surface pattern of steep-pitch thread test specimen in three phases in measuring process three, utilize the tool wear form under identical cutting stroke and the machined surface pattern of corresponding steep-pitch thread test specimen, detect that the machined surface pattern on steep-pitch thread test specimen that increases of test tool abrasion affects the upper difference existed.
3. a kind of method of testing carrying out axial stratification turning steep-pitch thread tool wear according to claim 2, it is characterized in that: described steep-pitch thread test specimen is pitch be 16mm, external diameter is 120mm, length is the trapezoidal dextrorotation external screw rod test specimen of 160mm, and its material is 35CrMo.
4. a kind of method of testing carrying out axial stratification turning steep-pitch thread tool wear according to claim 2, it is characterized in that: the left and right sword angle of described test cutter is 26 ��, top relief angle is the cutting edge inclination of 5 ��, two cutting edges and anterior angle be 0 ��, relief angle be 5 ��, left sword radius of edge be 138.77mm, left sword radius of edge be 201.56mm, its material is W18Cr4v.
5. a kind of method of testing carrying out axial stratification turning steep-pitch thread tool wear according to claim 2, it is characterised in that: steep-pitch thread test specimen is carried out turning with rotating speed 10rpm, axial allowance 0.05mm by described test cutter on CA6140 lathe.
6. a method of testing according to claim 2 carries out the computational methods of axial stratification turning steep-pitch thread tool wear heating power load, it is characterized in that: by before the test cutter that step one in claim 2 obtains, arc radius after wear of the tool flank data and cutting edge and corner wear, Deform computed in software is adopted to go out to test the cutting temperature under cutter difference tool wear form and cutting force, boundary condition using the cutting temperature that calculates and cutting force as analysis on Stress Field, adopt the maximum stress under Ansys computed in software test cutter difference state of wear, the variation characteristic that acquisition power thermal force increases with cutting stroke and tool abrasion increases.
7. the computational methods of a kind of axial stratification turning steep-pitch thread tool wear heating power load according to claim 6, it is characterised in that: the wearing depth of test cutter is calculated by formula (6):
��=�� apve-b/Tdt(6)
In formula, p to be normal pressure, v the be chip sliding velocity chip relative to test cutter is test coefficient for test cutter with chip contact district temperature, a, d relative to cutter, T, and material takes a of acquiescence, d value.
8. the computational methods of a kind of axial stratification turning steep-pitch thread tool wear heating power load according to claim 6, it is characterized in that: adopt Deform software to obtain the Thermal-mechanical Coupling field of cutter difference wear stage, be perpendicular to the vertical line d of the left cutting edge of test cutter in Thermal-mechanical Coupling field temperature highest position2', intersection point is d to the distance of point of a knife1', utilize point of a knife, d1' and d2' test cutter maximum temperature position is depicted, extract the accurate location of the test most temperature of cutter and test cutter and chip contact district maximum temperature, extract this position test cutter rake face temperature and test cutter and the chip contact district time dependent curve of temperature, extract each wear stage maximum temperature of cutter, obtain test tool temperature with knife face abrasion width change curve thereafter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610151080.XA CN105643024B (en) | 2016-03-17 | 2016-03-17 | A kind of turning steep-pitch thread axial stratification cutting process, tool wear method of testing and its power thermal force computational methods |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106944880A (en) * | 2017-04-21 | 2017-07-14 | 哈尔滨理工大学 | The big pitch internal threading tool cutting edge tooth shape retentivity detection method of turning |
| CN107414601A (en) * | 2017-08-09 | 2017-12-01 | 哈尔滨理工大学 | A kind of detection method of big pitch internal threading tool abrasion of turning to machined surface roughness influencing characterisitic |
| CN107553218A (en) * | 2017-08-09 | 2018-01-09 | 哈尔滨理工大学 | A kind of detection method of big pitch internal threading tool vibration of turning to cutter wear of the tool flank widths affect characteristic |
| CN110039129A (en) * | 2019-04-30 | 2019-07-23 | 哈尔滨汽轮机厂有限责任公司 | A kind of processing method of steam turbine valve disc steep-pitch thread |
| CN110076396A (en) * | 2019-04-19 | 2019-08-02 | 黄石市高潮工矿机械有限公司 | A kind of processing technology of steep-lead thread |
| CN110153510A (en) * | 2019-03-26 | 2019-08-23 | 宁夏天地奔牛实业集团有限公司 | A kind of digital control type interlocks feed Screw thread process method |
| CN112518424A (en) * | 2020-12-01 | 2021-03-19 | 湘潭大学 | Method and device for predicting cutting force of thread turning |
| CN112643059A (en) * | 2020-11-27 | 2021-04-13 | 哈尔滨理工大学 | Design method of vibration reduction cutter for turning large-pitch threads |
| CN113792467A (en) * | 2021-09-17 | 2021-12-14 | 福州大学 | Wear prediction method for high-speed milling ADC12 aluminum alloy cutter |
| CN114012186A (en) * | 2021-09-27 | 2022-02-08 | 海天塑机集团有限公司 | Feeding system and method for turning threads |
| CN114607304A (en) * | 2022-02-25 | 2022-06-10 | 中海油能源发展股份有限公司 | Method for calculating axial distance of cutting notch and blade abrasion length of multilayer eccentric sleeve |
| CN114682861A (en) * | 2020-12-28 | 2022-07-01 | 通用汽车环球科技运作有限责任公司 | Hybrid threaded tool with cutting portion and rolling portion |
| CN114871457A (en) * | 2022-05-23 | 2022-08-09 | 大连船用柴油机有限公司 | Method for processing zigzag threads of hydraulic nut of large ship shafting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4108300A1 (en) * | 1991-03-14 | 1992-09-17 | Volker Zang | Tool cutting angle measurement arrangement, esp. for milling tool - has sensing element with rotary indicator plate which is brought into contact with the cutting surface |
| JPH1015782A (en) * | 1996-07-04 | 1998-01-20 | Sumitomo Electric Ind Ltd | Abnormality detector for cutting tool |
| CN101020264A (en) * | 2007-01-25 | 2007-08-22 | 祁宝栋 | Thread turning process |
| CN101590614A (en) * | 2009-07-03 | 2009-12-02 | 南京航空航天大学 | Method for measuring wear of numerical control milling cutting tool based on shape copying |
-
2016
- 2016-03-17 CN CN201610151080.XA patent/CN105643024B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4108300A1 (en) * | 1991-03-14 | 1992-09-17 | Volker Zang | Tool cutting angle measurement arrangement, esp. for milling tool - has sensing element with rotary indicator plate which is brought into contact with the cutting surface |
| JPH1015782A (en) * | 1996-07-04 | 1998-01-20 | Sumitomo Electric Ind Ltd | Abnormality detector for cutting tool |
| CN101020264A (en) * | 2007-01-25 | 2007-08-22 | 祁宝栋 | Thread turning process |
| CN101590614A (en) * | 2009-07-03 | 2009-12-02 | 南京航空航天大学 | Method for measuring wear of numerical control milling cutting tool based on shape copying |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106944880A (en) * | 2017-04-21 | 2017-07-14 | 哈尔滨理工大学 | The big pitch internal threading tool cutting edge tooth shape retentivity detection method of turning |
| CN107414601A (en) * | 2017-08-09 | 2017-12-01 | 哈尔滨理工大学 | A kind of detection method of big pitch internal threading tool abrasion of turning to machined surface roughness influencing characterisitic |
| CN107553218A (en) * | 2017-08-09 | 2018-01-09 | 哈尔滨理工大学 | A kind of detection method of big pitch internal threading tool vibration of turning to cutter wear of the tool flank widths affect characteristic |
| CN110153510A (en) * | 2019-03-26 | 2019-08-23 | 宁夏天地奔牛实业集团有限公司 | A kind of digital control type interlocks feed Screw thread process method |
| CN110076396A (en) * | 2019-04-19 | 2019-08-02 | 黄石市高潮工矿机械有限公司 | A kind of processing technology of steep-lead thread |
| CN110039129A (en) * | 2019-04-30 | 2019-07-23 | 哈尔滨汽轮机厂有限责任公司 | A kind of processing method of steam turbine valve disc steep-pitch thread |
| CN112643059A (en) * | 2020-11-27 | 2021-04-13 | 哈尔滨理工大学 | Design method of vibration reduction cutter for turning large-pitch threads |
| CN112643059B (en) * | 2020-11-27 | 2024-01-26 | 哈尔滨理工大学 | Design method of turning large-pitch thread vibration reduction tool |
| CN112518424A (en) * | 2020-12-01 | 2021-03-19 | 湘潭大学 | Method and device for predicting cutting force of thread turning |
| CN114682861A (en) * | 2020-12-28 | 2022-07-01 | 通用汽车环球科技运作有限责任公司 | Hybrid threaded tool with cutting portion and rolling portion |
| CN114682861B (en) * | 2020-12-28 | 2023-12-01 | 通用汽车环球科技运作有限责任公司 | Hybrid thread tool with cutting and rolling portions |
| CN113792467A (en) * | 2021-09-17 | 2021-12-14 | 福州大学 | Wear prediction method for high-speed milling ADC12 aluminum alloy cutter |
| CN114012186A (en) * | 2021-09-27 | 2022-02-08 | 海天塑机集团有限公司 | Feeding system and method for turning threads |
| CN114607304A (en) * | 2022-02-25 | 2022-06-10 | 中海油能源发展股份有限公司 | Method for calculating axial distance of cutting notch and blade abrasion length of multilayer eccentric sleeve |
| CN114871457A (en) * | 2022-05-23 | 2022-08-09 | 大连船用柴油机有限公司 | Method for processing zigzag threads of hydraulic nut of large ship shafting |
| CN114871457B (en) * | 2022-05-23 | 2023-11-03 | 大连船用柴油机有限公司 | Processing method of zigzag threads of hydraulic nut of large ship shafting |
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