CN103157857B - A kind of interference thread processing method - Google Patents
A kind of interference thread processing method Download PDFInfo
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- CN103157857B CN103157857B CN201110427062.7A CN201110427062A CN103157857B CN 103157857 B CN103157857 B CN 103157857B CN 201110427062 A CN201110427062 A CN 201110427062A CN 103157857 B CN103157857 B CN 103157857B
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Abstract
A processing method for interference thread, is characterized in that: the angle tolerance of the thread form angle of interference thread is-20 points ~ 0.The invention provides the interference thread processing method that a kind of technique effect is excellent, it is high that it has reliability, and operability waits outstanding advantages well, has foreseeable comparatively huge economic worth and technological value.
Description
Technical field
The present invention relates to Machining Technology field, specifically provide a kind of interference thread processing method.
Background technology
Tapping is indispensable in part process and process velocity operation comparatively slowly.Interference thread is with the high difficult point become in screw thread process of its machining accuracy, become machining bottleneck, traditional-handwork screw thread adopts level Four screw tap hand to attack row processing, at the bottom of screw tap chip removal situation difference roughness, easily embrace cone, personnel labor intensity is high, the screwed hole quality of processing and efficiency low, also there will be various problem in process, as, screw tap fractures, and screw thread is button disorderly, screw thread loudspeaker, screw thread verticality is overproof, the various problems such as the pitch diameter of thread is overproof, tapping is attacked motionless, and processing metapore is defective, take out screw tap rear thread and damage when screw tap fractures.Particularly the level of operator is all the principal element affecting screw processing quality.
Do not lack the system research about the processing method of interference thread and report abroad yet.
The effect of external thread gauge is the group selecting stud used, ensures assembling tightness, added at the scene in the past often occur man-hour otherwise go side, the full mistake of not-go-end, or not-go-end has only crossed go side.The processing of interference thread is defective all the time.The not-go-end of external thread gauge, for measuring the pitch diameter of thread, crosses end for measuring threaded integral profile.
According to HB6545-91 (or HB243-70), interference thread has AG, four kinds, BG, CG and DG screw thread.Wherein: AG screw thread refers to that steel screws into screw thread used in Al alloys andMg alloys body: BG screw thread refers to that non-ferrous metal screws into screw thread used in Al alloys andMg alloys body; CG screw thread refers to that steel screws into screw thread used in steel body: DG screw thread refers to that steel screws into screw thread used in titanium alloy body.AG, BG screw thread that is grouped into of pitch diameter of thread tolerance range divides 3 groups, and CG, DG screw thread divides 4 groups.Central diameter grouping limit deviation, screw-pitch deviation, half angular displacement, central diameter tapering tolerance and central diameter roundness tolerance are in table 1, table 2, table 3, table 4.
Table 1
Table 2AG, BG pitch diameter of thread grouping limit deviation
Table 3CG, DG pitch diameter of thread grouping limit deviation
Table 4AG, CG, DG Screw assembly moment of torsion
People expect to obtain the better interference thread processing method of a kind of technique effect.
Summary of the invention
The object of this invention is to provide the better interference thread processing method of a kind of technique effect.
The processing method of a kind of interference thread of the present invention, is characterized in that: according to HB6545-91 (or HB243-70), and the angle tolerance of the thread form angle of interference thread is-20 points ~ 0.
According to HB6545-91 (or HB243-70), interference thread has AG, four kinds, BG, CG and DG screw thread.The effect of external thread gauge is the group selecting stud used, ensures assembling tightness, added at the scene in the past often occur man-hour otherwise go side, the full mistake of not-go-end, or not-go-end has only crossed go side.The processing of interference thread is defective all the time.The not-go-end of external thread gauge, for measuring the pitch diameter of thread, crosses end for measuring threaded integral profile.Through our analysis verification, we think and occur that this phenomenon is the problem due to thread form angle.Through repeatedly calculating and measure the thread form angle of part section and screw cutter, we sum up when the thread form angle of CG screw thread is when being greater than 60 °, and the not-go-end of external thread gauge has been crossed, and go side only.If continue feed to strengthen central diameter, so just cause the go side of external thread gauge, the full mistake of not-go-end.When screw cutter accomplishes that thread form angle is when being less than 60 ° of-20 timesharing, Milling Machining screw thread is out completely qualified.We also have found the application screw tap processing often underproof reason of generation since then.Think that the thread form angle tolerance on HB6545-91 is 60 ° ± 20 points needs amendments through putting into practice us, change into (60 °-20 points) ~ 60 °.
The processing method of interference thread of the present invention, also claimed following preferred content:
See Fig. 2, when described interference thread is CG8 × 1.25, workpiece material titanium alloy, pitch 1.25mm, bottom diameter: d
j=6.917
+ 0.16mm, corresponding radius R
j=3.458mm; Nominal diameter: d
0=8mm, corresponding radius R
0=4mm; Reach: L=15mm; Milling cutter diameter d
1=5.82mm, now meets following requirement:
Cutting speed A
r=d
0 2-d
j 2/ 4* (d
0-d
j)=2.019mm
Feed engagement: f
z=0.069mm
The cutting edge place amount of feeding: V
feff=510.6mm/min
The amount of feeding of milling cutter center: V
fprog=V
feff* (d
0-d
1)/d
0=127.65mm/min
The speed of mainshaft is N=1850r/min
At coefficient C
1under=0.3mm condition, radial incision radius R
e=(R
j-C
l)
2+ R
0 2* R
0=3.247mm.Corresponding procedure meets following requirement:
Starting point (O): X
a=0Y
a=0;
Attached: CNC program thread milling program (Siemens)
G90G54G00X0Y0Z0
T1D1M3S1850
G91G00Z-15.3125M08
G42X0Y-3.158Z0F127.65
G02X-4Y3.158Z0.3125CR＝3.247
G02X8Y0Z0.625CR＝4
G02X-8Y0Z0.625CR＝4
G02X4Y3.158Z0。3125CR＝3.247
G00G40X0Y-3.158Zo
G00Z200
M05
M30
When described interference thread is DG5 × 0.8 screw thread, workpiece material titanium alloy, pitch 0.8mm; Bottom diameter: d
j=4.134
+ 0.16mm, corresponding radius R
j=2.067mm; Nominal diameter: d
0=5mm, corresponding radius R 0=2.5mm; Reach: L=10mm; Milling cutter diameter d
1=4.30mm, now meets following requirement:
Cutting speed A
r=d
0 2-d
j 2/ 4* (d
0-d
j)=2.586mm,
Feed engagement: f
z=0.066mm,
The cutting edge place amount of feeding: V
feff=495mm/min,
The amount of feeding of milling cutter center: V
fprog=V
feff* (d
0-d
1)/d
0=80mm/min,
The speed of mainshaft is N=2500r/min,
At coefficient C
1under=0.3mm condition, radial incision radius R
e=(R
j-C
l)
2+ R
0 2/ 2*R
0=1.603mm.Corresponding procedure meets following requirement:
Starting point (O): X
a=0Y
a=0
Attached: CNC program thread milling program (Siemens)
G90G54G00X0Y0Z0
T1D1M3s2500
G91G00Z-10.2M08
G42X0Y-1.603Z0F80
G02X-2.5Y1.603Z0.25CR＝1.767
G02X5Y0Z0.4CR＝3
G02X-5Y0Z0.4CR＝3
G02X2.5Y1.603Z0.2CR＝1.767
G00G40X0Y-1.603Z0
G00Z200
M05
M30
When described interference thread is AG6 × 1, workpiece material titanium alloy, pitch 0.8mm; Bottom diameter: d
j=4.917
+ 0.16mm, corresponding radius R
j=2.458mm; Nominal diameter: d
0=6mm, corresponding radius R
0=3mm, reach: L=10mm; Milling cutter diameter d
1=4.36mm, now meets following requirement:
Cutting speed A
r=d
0 2-d
j 2/ 4* (d
0-d
j)=1.971mm
Feed engagement: f
z=0.06mm
The cutting edge place amount of feeding: V
feff=444mm/min
The amount of feeding of milling cutter center: V
fprog=V
feff* (d
0-d
1)/d
0=70mm/min
The speed of mainshaft is N=2470r/min,
At coefficient C
1under=0.3mm condition, radial incision radius R
e=(R
j-C
l)
2+ R
0 2/ 2*R
0=2.307mm.Corresponding procedure meets following requirement:
Starting point (O): Xa=0Ya=0
Attached: CNC program thread milling program (Siemens)
G90G54G00X0Y0Z0
T1D1M3S2470
G91G00z-10.25M08
G42X0Y-2.158Z0F70
G02X-3Y2.158Z0.25CR＝2.307
G02X6Y0Z0.5CR＝3
G02X-6Y0Z0.5CR＝3
G02X3Y2.158Z0.25CR＝2.307
GO0G40X0Y-2.158Z0
G00Z200
M05
M30
The processing method of described interference thread, is characterized in that:
Thread milling requires process equipment to require, and having three-shaft linkage function can realize spiral interpolation, spiral interpolation is the function of CNC, its allows cutter along spiral motion, and a screw is the linear motion at a plane orthogonal therewith while of doing circus movement in a plane; Namely circular motion creates the diameter of screw thread, and synchronous rectilinear motion creates pitch; In most of CNC system, spiral interpolation has been come by G02, G03 two kinds of instructions;
The cut-in manner of three kinds of screw threads is had: cut out along tangent arc direction in thread milling, cut out along radial direction, tangentially cut out, here select to cut out along tangent arc direction, namely milling cutter from center with rapid movement to the about 0.5mm of part, along arc track and simultaneously along Z axis incision workpiece until the complete tooth form degree of depth.After a closed loop, milling cutter cuts out workpiece in the same way, adopts in this way, the incision workpiece that cutter is level and smooth, cuts out workpiece again in the same way, even if process stone material, also can not shake cutter, is the best way of the high-quality screw thread of milling.The movement locus of screw cutter milling thread as shown in Figure 1.
We just explain orally the method how applying screw cutter machining screw below.Process the cutter employing screw cutter as shown in Figure 2, Figure 3, Figure 4 selected.Some is as screw tap outwardly for the cutting edge of screw cutter, in fact different from screw tap, and without spiral lift on this cutter, the spiral in actual processing mainly realizes by the motion of lathe.So milling thread its focus on the motion how controlling lathe.
The advantage of numerical control milling screw thread is: process time is short, and process safety is high, has good surface quality, cutter can solve through hole and blind threaded, solve processing dextrorotation and left hand thread, the screw thread of different size and tolerance can be processed, very little cutting force, can be used for the processing of thin-wall part, the depth of thread can arrive the bottom in hole, without iron filings problem, shaftless to cutting by mistake, through the calculating to cutting parameter, estimate that its working (machining) efficiency and precision improve 50% by than traditional method.
According to HB6545-91, interference thread has AG, four kinds, BG, CG and DG screw thread.The effect of external thread gauge is the group selecting stud used, ensures assembling tightness, added at the scene in the past often occur man-hour otherwise go side, the full mistake of not-go-end, or not-go-end has only crossed go side.The processing of interference thread is defective all the time.The not-go-end of external thread gauge, for measuring the pitch diameter of thread, crosses end for measuring threaded integral profile.
Through our analysis verification, we think and occur that this phenomenon is the problem due to thread form angle.
The present invention is while raising working (machining) efficiency, and also decrease the labour intensity of operator significantly, digital control processing clamped one time will ensure screw thread verticality better, reduces component assembling error.And the waste product that can not produce under normal circumstances because human factor causes, its surface quality and surface luminous intensity improve greatly, and repair rate is zero, thus improves the quality of products.The processing method of numerical control milling screw thread will replace traditional processing method.Under rational machined parameters, estimate that its working (machining) efficiency and machining accuracy improve 50%, especially better for the screw thread effect produced in enormous quantities.
Through actual machining experiment, machining titanium alloy part one machined 70 cutter, separate unit cutter expense 65.7 yuan.Application screw tap is processed one group and is processed 15, separate unit cutter expense 546.7 yuan.Process 100 calculating every year by stainless steel parts, cost and efficiency and titanium alloy are substantially the same.But it should be noted that, use machining center thread milling, its crudy and precision are that manual processing is beyond one's reach.
The invention provides the interference thread processing method that a kind of technique effect is excellent, it is high that it has reliability, and operability waits outstanding advantages well, has foreseeable comparatively huge economic worth and technological value.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation:
Fig. 1 is screw thread process Principle of Process schematic diagram;
The structural principle schematic diagram of the screw tool that Fig. 2 uses for embodiment 1;
The structural principle schematic diagram of the screw tool that Fig. 3 uses for embodiment 2;
The structural principle schematic diagram of the screw tool that Fig. 4 uses for embodiment 3.
Detailed description of the invention
Embodiment 1
The processing method of a kind of interference thread of the present invention, is characterized in that: according to HB6545-91 (or HB243-70), and the angle tolerance of the thread form angle of interference thread is-20 points ~ 0.
According to HB6545-91 (or HB243-70), interference thread has AG, four kinds, BG, CG and DG screw thread.The effect of external thread gauge is the group selecting stud used, ensures assembling tightness, added at the scene in the past often occur man-hour otherwise go side, the full mistake of not-go-end, or not-go-end has only crossed go side.The processing of interference thread is defective all the time.The not-go-end of external thread gauge, for measuring the pitch diameter of thread, crosses end for measuring threaded integral profile.Through our analysis verification, we think and occur that this phenomenon is the problem due to thread form angle.Through repeatedly calculating and measure the thread form angle of part section and screw cutter, we sum up when the thread form angle of CG screw thread is when being greater than 60 °, and the not-go-end of external thread gauge has been crossed, and go side only.If continue feed to strengthen central diameter, so just cause the go side of external thread gauge, the full mistake of not-go-end.When screw cutter accomplishes that thread form angle is when being less than 60 ° of-20 timesharing, Milling Machining screw thread is out completely qualified.We also have found the application screw tap processing often underproof reason of generation since then.Think that the thread form angle tolerance on HB6545-91 is 60 ° ± 20 points needs amendments through putting into practice us.Change into (60 °-20 points) ~ 60 °.
See Fig. 2, when described interference thread is CG8 × 1.25, workpiece material titanium alloy, pitch 1.25mm, bottom diameter: d
j=6.917
+ 0.16mm, corresponding radius R
j=3.458mm; Nominal diameter: d
0=8mm, corresponding radius R
0=4mm; Reach: L=15mm; Milling cutter diameter d
1=5.82mm, now meets following requirement:
Cutting speed A
r=d
0 2-d
j 2/ 4* (d
0-d
j)=2.019mm
Feed engagement: f
z=0.069mm
The cutting edge place amount of feeding: V
feff=510.6mm/min
The amount of feeding of milling cutter center: V
fprog=V
feff* (d
0-d
1)/d
0=127.65mm/min
The speed of mainshaft is N=1850r/min
At coefficient C
1under=0.3mm condition, radial incision radius R
e=(R
j-C
l)
2+ R
0 2* R
0=3.247mm;
Along the amount of movement of Z axis, between A and B: Z
α=P* α/360=1.25*90 °/360 °=0.3125mm
When starting to cut, Ⅹ and the coordinate of Y: X=0, Y=-R
j+ C
l=-3.458+0.3=-3.158,
When starting to cut, Z coordinate: Z=-(L+Z
α)=-15.3125; L=reach.
Corresponding procedure meets following requirement:
Starting point (O): X
a=0Y
a=0;
Attached: CNC program thread milling program (Siemens)
G90G54G00X0Y0Z0
T1D1M3S1850
G91G00Z-15.3125M08
G42X0Y-3.158Z0F127.65
G02X-4Y3.158Z0.3125CR＝3.247
G02X8Y0Z0.625CR＝4
G02X-8Y0Z0.625CR＝4
G02X4Y3.158Z0。3125CR＝3.247
G00G40X0Y-3.158Zo
G00Z200
M05
M30
In the processing method of described interference thread, thread milling requires process equipment to require, and having three-shaft linkage function can realize spiral interpolation, spiral interpolation is the function of CNC, its allows cutter along spiral motion, and a screw is the linear motion at a plane orthogonal therewith while of doing circus movement in a plane; Namely circular motion creates the diameter of screw thread, and synchronous rectilinear motion creates pitch; In most of CNC system, spiral interpolation has been come by G02, G03 two kinds of instructions;
The cut-in manner of three kinds of screw threads is had: cut out along tangent arc direction in thread milling, cut out along radial direction, tangentially cut out, here select to cut out along tangent arc direction, namely milling cutter from center with rapid movement to the about 0.5mm of part, along arc track and simultaneously along Z axis incision workpiece until the complete tooth form degree of depth.After a closed loop, milling cutter cuts out workpiece in the same way, adopts in this way, the incision workpiece that cutter is level and smooth, cuts out workpiece again in the same way, even if process stone material, also can not shake cutter, is the best way of the high-quality screw thread of milling.The movement locus of screw cutter milling thread as shown in Figure 1.
We just explain orally the method how applying screw cutter machining screw below.Process the cutter employing screw cutter as shown in Figure 2 selected.Some is as screw tap outwardly for the cutting edge of screw cutter, in fact different from screw tap, and without spiral lift on this cutter, the spiral in actual processing mainly realizes by the motion of lathe.So milling thread its focus on the motion how controlling lathe.
The advantage of numerical control milling screw thread is: process time is short, and process safety is high, has good surface quality, cutter can solve through hole and blind threaded, solve processing dextrorotation and left hand thread, the screw thread of different size and tolerance can be processed, very little cutting force, can be used for the processing of thin-wall part, the depth of thread can arrive the bottom in hole, without iron filings problem, shaftless to cutting by mistake, through the calculating to cutting parameter, estimate that its working (machining) efficiency and precision improve 50% by than traditional method.
According to HB6545-91, interference thread has AG, four kinds, BG, CG and DG screw thread.The effect of external thread gauge is the group selecting stud used, ensures assembling tightness, added at the scene in the past often occur man-hour otherwise go side, the full mistake of not-go-end, or not-go-end has only crossed go side.The processing of interference thread is defective all the time.The not-go-end of external thread gauge, for measuring the pitch diameter of thread, crosses end for measuring threaded integral profile.
Through our analysis verification, we think and occur that this phenomenon is the problem due to thread form angle.
The present invention is while raising working (machining) efficiency, and also decrease the labour intensity of operator significantly, digital control processing clamped one time will ensure screw thread verticality better, reduces component assembling error.And the waste product that can not produce under normal circumstances because human factor causes, its surface quality and surface luminous intensity improve greatly, and repair rate is zero, thus improves the quality of products.The processing method of numerical control milling screw thread will replace traditional processing method.Under rational machined parameters, estimate that its working (machining) efficiency and machining accuracy improve 50%, especially better for the screw thread effect produced in enormous quantities.
Through actual machining experiment, machining titanium alloy part one machined 70 cutter, separate unit cutter expense 65.7 yuan.Application screw tap is processed one group and is processed 15, separate unit cutter expense 546.7 yuan.Process 100 calculating every year by stainless steel parts, cost and efficiency and titanium alloy are substantially the same.But it should be noted that, use machining center thread milling, its crudy and precision are that manual processing is beyond one's reach.
The invention provides the interference thread processing method that a kind of technique effect is excellent, it is high that it has reliability, and operability waits outstanding advantages well, has foreseeable comparatively huge economic worth and technological value.
Embodiment 2
The processing method of a kind of interference thread of the present invention, is characterized in that: according to HB6545-91 (or HB243-70), and the angle tolerance of the thread form angle of interference thread is-20 points ~ 0.
According to HB6545-91 (or HB243-70), interference thread has AG, four kinds, BG, CG and DG screw thread.The effect of external thread gauge is the group selecting stud used, ensures assembling tightness, added at the scene in the past often occur man-hour otherwise go side, the full mistake of not-go-end, or not-go-end has only crossed go side.The processing of interference thread is defective all the time.The not-go-end of external thread gauge, for measuring the pitch diameter of thread, crosses end for measuring threaded integral profile.Through our analysis verification, we think and occur that this phenomenon is the problem due to thread form angle.Through repeatedly calculating and measure the thread form angle of part section and screw cutter, we sum up when the thread form angle of CG screw thread is when being greater than 60 °, and the not-go-end of external thread gauge has been crossed, and go side only.If continue feed to strengthen central diameter, so just cause the go side of external thread gauge, the full mistake of not-go-end.When screw cutter accomplishes that thread form angle is when being less than 60 ° of-20 timesharing, Milling Machining screw thread is out completely qualified.We also have found the application screw tap processing often underproof reason of generation since then.Think that the thread form angle tolerance on HB6545-91 is 60 ° ± 20 points needs amendments through putting into practice us.Change into (60 °-20 points) ~ 60 °.
See Fig. 3, when described interference thread is DG5 × 0.8 screw thread, workpiece material titanium alloy, pitch 0.8mm; Bottom diameter: d
j=4.134
+ 0.16mm, corresponding radius R
j=2.067mm; Nominal diameter: d
0=5mm, corresponding radius R
0=2.5mm; Reach: L=10mm; Milling cutter diameter d
1=4.30mm, now meets following requirement:
Cutting speed A
r=d
0 2-d
j 2/ 4* (d
0-d
j)=2.586mm,
Feed engagement: f
z=0.066mm,
The cutting edge place amount of feeding: V
feff=495mm/min,
The amount of feeding of milling cutter center: V
fprog=V
feff* (d
0-d
1)/d
0=80mm/min,
The speed of mainshaft is N=2500r/min,
At coefficient C
1under=0.3mm condition, radial incision radius R
e=(R
j-C
l)
2+ R
0 2/ 2*R
0=1.603mm;
Along the amount of movement of Z axis, between A and B: Z
α=P* α/360=0.8*90 °/360 °=0.2mm;
When starting to cut, Ⅹ and the coordinate of Y: X=0, Y=-R
j+ C
l=-2.067+0.3=-1.767;
When starting to cut, Z coordinate: Z=-(L+Z
α)=-10.2, L=reach.
Corresponding procedure meets following requirement:
Starting point (O): X
a=0Y
a=0
Attached: CNC program thread milling program (Siemens)
G90G54G00X0Y0Z0
T1D1M3s2500
G91G00Z-10.2M08
G42X0Y-1.603Z0F80
G02X-2.5Y1.603Z0.25CR＝1.767
G02X5Y0Z0.4CR＝3
G02X-5Y0Z0.4CR＝3
G02X2.5Y1.603Z0.2CR＝1.767
G00G40X0Y-1.603Z0
G00Z200
M05
M30
In the processing method of described interference thread, thread milling requires process equipment to require, and having three-shaft linkage function can realize spiral interpolation, spiral interpolation is the function of CNC, its allows cutter along spiral motion, and a screw is the linear motion at a plane orthogonal therewith while of doing circus movement in a plane; Namely circular motion creates the diameter of screw thread, and synchronous rectilinear motion creates pitch; In most of CNC system, spiral interpolation has been come by G02, G03 two kinds of instructions;
The cut-in manner of three kinds of screw threads is had: cut out along tangent arc direction in thread milling, cut out along radial direction, tangentially cut out, here select to cut out along tangent arc direction, namely milling cutter from center with rapid movement to the about 0.5mm of part, along arc track and simultaneously along Z axis incision workpiece until the complete tooth form degree of depth.After a closed loop, milling cutter cuts out workpiece in the same way, adopts in this way, the incision workpiece that cutter is level and smooth, cuts out workpiece again in the same way, even if process stone material, also can not shake cutter, is the best way of the high-quality screw thread of milling.The movement locus of screw cutter milling thread as shown in Figure 1.
Embodiment 3
A processing method for interference thread, according to HB6545-91 (or HB243-70), the angle tolerance of the thread form angle of interference thread is-20 points ~ 0.
According to HB6545-91 (or HB243-70), interference thread has AG, four kinds, BG, CG and DG screw thread.The effect of external thread gauge is the group selecting stud used, ensures assembling tightness, added at the scene in the past often occur man-hour otherwise go side, the full mistake of not-go-end, or not-go-end has only crossed go side.The processing of interference thread is defective all the time.The not-go-end of external thread gauge, for measuring the pitch diameter of thread, crosses end for measuring threaded integral profile.Through our analysis verification, we think and occur that this phenomenon is the problem due to thread form angle.Through repeatedly calculating and measure the thread form angle of part section and screw cutter, we sum up when the thread form angle of CG screw thread is when being greater than 60 °, and the not-go-end of external thread gauge has been crossed, and go side only.If continue feed to strengthen central diameter, so just cause the go side of external thread gauge, the full mistake of not-go-end.When screw cutter accomplishes that thread form angle is when being less than 60 ° of-20 timesharing, Milling Machining screw thread is out completely qualified.We also have found the application screw tap processing often underproof reason of generation since then.Think that the thread form angle tolerance on HB6545-91 is 60 ° ± 20 points needs amendments through putting into practice us.Change into (60 °-20 points) ~ 60 °.
See Fig. 4, when described interference thread is AG6 × 1, workpiece material titanium alloy, pitch 0.8mm; Bottom diameter: d
j=4.917
+ 0.16mm, corresponding radius R
j=2.458mm; Nominal diameter: d
0=6mm, corresponding radius R
0=3mm, reach: L=10mm; Milling cutter diameter d
1=4.36mm, now meets following requirement:
Cutting speed A
r=d
0 2-d
j 2/ 4* (d
0-d
j)=1.971mm
Feed engagement: f
z=0.06mm
The cutting edge place amount of feeding: V
feff=444mm/min
The amount of feeding of milling cutter center: V
fprog=V
feff* (d
0-d
1)/d
0=70mm/min
The speed of mainshaft is N=2470r/min
At coefficient C
1under=0.3mm condition, radial incision radius R
e=(R
j-C
l)
2+ R
0 2/ 2*R
0=2.307mm;
Along the amount of movement of Z axis, between A and B: Z
α=P* α/360=0.8*90 °/360 °=0.25mm
When starting to cut, Ⅹ and the coordinate of Y: X=0Y=-R
j+ C
l=-2.458+0.3=-2.158
When starting to cut, Z coordinate: Z=-(L+Z
α)=-10.25; L=reach.
Corresponding procedure meets following requirement:
Starting point (O): Xa=0Ya=0
Attached: CNC program thread milling program (Siemens)
G90G54G00X0Y0Z0
T1D1M3S2470
G91G00z-10.25M08
G42X0Y-2.158Z0F70
G02X-3Y2.158Z0.25CR＝2.307
G02X6Y0Z0.5CR＝3
G02X-6Y0Z0.5CR＝3
G02X3Y2.158Z0.25CR＝2.307
GO0G40X0Y-2.158Z0
G00Z200
M05
M30
In the processing method of described interference thread, thread milling requires process equipment to require, and having three-shaft linkage function can realize spiral interpolation, spiral interpolation is the function of CNC, its allows cutter along spiral motion, and a screw is the linear motion at a plane orthogonal therewith while of doing circus movement in a plane; Namely circular motion creates the diameter of screw thread, and synchronous rectilinear motion creates pitch; In most of CNC system, spiral interpolation has been come by G02, G03 two kinds of instructions;
The cut-in manner of three kinds of screw threads is had: cut out along tangent arc direction in thread milling, cut out along radial direction, tangentially cut out, here select to cut out along tangent arc direction, namely milling cutter from center with rapid movement to the about 0.5mm of part, along arc track and simultaneously along Z axis incision workpiece until the complete tooth form degree of depth.After a closed loop, milling cutter cuts out workpiece in the same way, adopts in this way, the incision workpiece that cutter is level and smooth, cuts out workpiece again in the same way, even if process stone material, also can not shake cutter, is the best way of the high-quality screw thread of milling.The movement locus of screw cutter milling thread as shown in Figure 1.
Claims (2)
1. a processing method for interference thread, is characterized in that: the angle tolerance of the thread form angle of interference thread is-20 points ~ 0;
Described interference thread is CG8 × 1.25, workpiece material titanium alloy, pitch 1.25mm, bottom diameter: d
j=6.917
+ 0.16mm, corresponding radius R
j=3.458mm; Nominal diameter: d
0=8mm, corresponding radius R
0=4mm; Reach: L=15mm; Milling cutter diameter d
1=5.82mm, now meets following requirement:
Cutting speed A
r=d
0 2-d
j 2/ 4* (d
0-d
j)=2.019mm;
Feed engagement: f
z=0.069mm;
The cutting edge place amount of feeding: V
feff=510.6mm/min;
The amount of feeding of milling cutter center: V
fprog=V
feff* (d
0-d
1)/d
0=127.65mm/min;
The speed of mainshaft is N=1850r/min;
At coefficient C
1under=0.3mm condition, radial incision radius R
e=(R
j-C
l)
2+ R
0 2* R
0=3.247mm.
2., according to the processing method of interference thread described in claim 1, it is characterized in that:
Thread milling process equipment requires to have three-shaft linkage function and can realize spiral interpolation, and a screw is the linear motion at a plane orthogonal therewith while of doing circus movement in a plane;
Select to cut out along tangent arc direction in thread milling, namely milling cutter from center with rapid movement to part 0.5mm, along arc track and simultaneously along Z axis incision workpiece until the complete tooth form degree of depth.
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|---|---|---|---|---|
| CN2209235Y (en) * | 1993-09-08 | 1995-10-04 | 王庆堂 | Gradual change screw thread tooth type guide wimble |
| DE202007010616U1 (en) * | 2007-07-31 | 2007-09-27 | Zecha Hartmetall-Werkzeugfabrikation Gmbh | thread Mill |
| CN101767228A (en) * | 2010-03-23 | 2010-07-07 | 上海交通大学 | Polycrystalline diamond thread-forming tool |
| CN102126056A (en) * | 2011-01-06 | 2011-07-20 | 齐齐哈尔二机床(集团)有限责任公司 | XZC three-axis linkage thread milling method for milling machining center |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4553251B2 (en) * | 2005-04-13 | 2010-09-29 | オーエスジー株式会社 | Threading cutter |
-
2011
- 2011-12-18 CN CN201110427062.7A patent/CN103157857B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN2209235Y (en) * | 1993-09-08 | 1995-10-04 | 王庆堂 | Gradual change screw thread tooth type guide wimble |
| DE202007010616U1 (en) * | 2007-07-31 | 2007-09-27 | Zecha Hartmetall-Werkzeugfabrikation Gmbh | thread Mill |
| CN101767228A (en) * | 2010-03-23 | 2010-07-07 | 上海交通大学 | Polycrystalline diamond thread-forming tool |
| CN102126056A (en) * | 2011-01-06 | 2011-07-20 | 齐齐哈尔二机床(集团)有限责任公司 | XZC three-axis linkage thread milling method for milling machining center |
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