CN102335753A - Turning method for enveloping worm helical surface based on common numerically controlled lathe - Google Patents
Turning method for enveloping worm helical surface based on common numerically controlled lathe Download PDFInfo
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- CN102335753A CN102335753A CN2011103160649A CN201110316064A CN102335753A CN 102335753 A CN102335753 A CN 102335753A CN 2011103160649 A CN2011103160649 A CN 2011103160649A CN 201110316064 A CN201110316064 A CN 201110316064A CN 102335753 A CN102335753 A CN 102335753A
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Abstract
The invention relates to the technical field of a turning method and particularly relates to a turning method for an enveloping worm helical surface based on a common numerically controlled lathe. The turning method comprises the following steps of: clamping a worm on the common numerically controlled lathe, wherein in a middle plane, a worm tooth root arc radius is Rf1, a tooth crest arc radius is Ra1, a base circle radius is rb and a width of a primary cutting edge of a cutting tool is L, and PM and NQ are respectively the projections of left and right tooth surfaces after a cross tooth of a worm shaft extends for a tooth; setting a constant rotating speed of a spindle; and processing by performing thread cutting motion and circular interpolation motion by the cutting tool. Compared with the prior art, the turning method provided by the invention has the advantages that the turning processing of an enveloping worm is thoroughly free from the dependence on a specially used lathe; the technical demand on an operator is reduced; the manufacturing cost is lowered; processing efficiency is greatly promoted; the processing of the enveloping worm is simpler; and the enveloping worm driving can be conveniently popularized and applied.
Description
[technical field]
Patent of the present invention relates to the method for turning technical field, a kind of specifically method for turning of the helical surface of enveloping worm based on centre numerically controlled lathe.
[background technology]
The turning of traditional helical surface of enveloping worm is carried out on special purpose machine tool; Be the gear-hobbing machine or the special purpose machine tool of lathe improvement processing different size worm screw the time all to dispose corresponding cutterhead and lathe tool; Process-cycle is long; Manufacturing cost is high, and the lathe adjustment is complicated loaded down with trivial details, and is high to workman's specification requirement.
Publication number is that the Chinese invention patent of CN101774029A discloses a kind of method for turning of multiple helical surface of enveloping worm on the numerically controlled lathe of band C axle that be suitable for; Though this technology has solved the turning problem of helical surface of enveloping worm to a certain extent; Broken away from dependence to special purpose machine tool; But not thorough, lathe has been proposed new demand, promptly must have the C axle.And most aborning numerically controlled lathe is not to be with the C axle.
[summary of the invention]
This method provides a kind of existing deficiency of processing method that overcomes, and further reduces the functional requirement to lathe, improves working (machining) efficiency, reduces the helical surface of enveloping worm method for turning based on centre numerically controlled lathe of manufacturing cost.
For realizing the method for turning of a kind of helical surface of enveloping worm based on centre numerically controlled lathe of above-mentioned purpose design; It is characterized in that endless screw apparatus is located on the centre numerically controlled lathe; Root circle of worm arc radius is that Rf1, tooth top arc radius are that Ra1, base radius are that rb, cutoff tool main cutting edge width are L in mid-plane; PM, NQ are respectively the projection that the worm screw tooth form of axial direction extends left side and right flank behind the tooth
It is S that the worm screw rotating speed is set, and moves top, cutoff tool right side sword to some M, carries out one section after worm screw screw chasing program radially; Is that radius carries out the circular interpolation motion with Ra1, processes a helix of left flank, tool motion to M ' point afterwards along worm screw withdrawing radially; Move top, cutter left side sword to the N point, carry out after one section screw chasing program still Ra1 once more and be radius and carry out circular interpolation and move to N ' point, cut a helix of right flank; The speed of this twice circular interpolation is consistent, moves right top sword behind the cutter withdrawing to the E point, makes radius of clean-up increase to R; Still carrying out same screw chasing program, is that radius carries out circular interpolation to E ' point then with R, moves top, left side sword behind the withdrawing to the F point; Carrying out after the same screw chasing instruction still is that radius carries out circular interpolation to F ' point with R, and the interpolation rate of this twice circular interpolation and have unequal angular velocity preceding twice is along with the increasing gradually of radius of clean-up; Right top sword is along MP, and left top sword constantly advances the cutting helicoid respectively along NQ, when radius of clean-up reaches Rf1; Be that turning goes out whole helicoid
The permanent rotating speed of main shaft in the turning process of helicoid.
Circular interpolation angular speed is identical when cutting the helicoid feed at every turn.
Screw chasing program terminal point is confirmed the start angle of helicoid cutting process worm screw at circumferencial direction.
Affiliated adjustment screw chasing program is carried out the parted hair of worm screw through the adjustment start angle.
Cutoff tool adopts common machine folder cutoff tool.
Can carry out the grinding allowance homogenizing after changing gearratio, base radius in the screw chasing program.
The main cutting edge Breadth Maximum L ' of cutoff tool, the computational methods of front cutting edge minimum length 1 are following:
If speed ratio i, number of threads z1, reference circle of wormwheel radius R 2, reference circle of worm axial tooth thickness s2, grinding allowance n, the then pairing central angle of gullet base on the root circle:
g＝((1/i/z1-(s2+n)/R2/2/3.14)*360+2*(Acos(rb/R2)-Acos(rb/Rf1))
So: L '=rb-Rf1*Sin (Asin (rb/Rf1)-g)
l＝Sqrt(Rf1^2-rb^2)-Sqrt(Ra1^2-rb^2)
Screw rod is the enveloping worm that outside circle is not repaired, and establishes worm screw working portion length L w, and for fear of collapsing cutter, the computational methods of its start radius R0 are following:
R0＝Sqrt(Ra1^2-(Lw/2)^2+(Lw/2-L)^2)
Described worm screw is that centre-to-centre spacing 125, number of threads 1, gearratio 33, root circle of worm arc radius 103.87, tip circle of worm arc radius 94.32, reference circle of wormwheel radius 98.5, worm screw working portion length 58, base radius 40, reference circle of worm axial tooth thickness 8.24, grinding allowance are 0.3 dextrorotation planar double-enveloping worm.
The present invention compares the turning processing that makes enveloping worm and has thoroughly broken away from the dependence to special purpose machine tool with existing invention, reduced the requirement of operator's technology.Reduce manufacturing cost, significantly improved working (machining) efficiency.Make the process technology of enveloping worm simpler, be convenient to popularizing and promoting of enveloping worm transmission.
[description of drawings]
Fig. 1 is a turning schematic diagram of the present invention;
Fig. 2 is embodiments of the invention figure;
[specific embodiment]
In conjunction with accompanying drawing the present invention is further specified, the manufacturing technology of this device is very clearly concerning this professional people.
As shown in Figure 2, be that 0.3 dextrorotation planar double-enveloping worm is an example with centre-to-centre spacing 125, number of threads 1, gearratio 33, root circle of worm arc radius 103.87, tip circle of worm arc radius 94.32, reference circle of wormwheel radius 98.5, worm screw working portion length 58, base radius 40, reference circle of worm axial tooth thickness 8.24, grinding allowance.
The cutting earlier of other size puts in place except that the worm spiral face.If the speed of mainshaft is 200.Adopt the carbide alloy cutoff tool, the width of main cutting edge is 5, and maximum cutting-in 22 is less than Breadth Maximum 5.62, greater than minimum length 10.44.If be radius during the initial cuts helicoid with Ra1, when lathe tool moves to center line O1O2 left side, will cause top sword and left side sword bite excessive, cause collapsing cutter, shown in the C point as shown in Figure 2.For fear of this phenomenon occurring, start radius is reduced to R0=92.905 at present.Mobile lathe tool makes top, right side sword overlap with some A.Carry out following instruction:
G99?G32?U#1?F#2?Q#3
G03?W#4?R#5?F#6
Wherein, #1, #2, #3, #4, #5, #6 are cutting parameter.#1, #2, #3 are invariant in process, and #4, #5, #6 are variable.#5=R1=92.905, #6=17.689 in the superincumbent program.
Program executes the back withdrawing, moves lathe tool again top, left side sword is overlapped with the B point.Carry out follow procedure:
G99?G32?U#1?F#2?Q#3
G03?W#7?R#5?F#6。
Wherein: #7 is a cutting parameter.Program executes the back withdrawing, and establishing the radial direction depth of cut is 0.03, makes #5=92.935, #6=17.965 along the radial direction feed behind the withdrawing, has recomputated the cutter point coordinates, makes right top sword along AP, and left top sword constantly cuts helicoid along BQ.Along with deepening continuously of radius of clean-up, above two sections programs be starting point with P, Q respectively after carrying out 366 times, be that radius is carried out the processing of promptly accomplishing whole helicoid after the cut program of twice helicoid once more with 103.87.
To multistart worm, adjustment parameter #1 is before carrying out the screw chasing instruction repertorie; Make original position along fixed range #1=2*#2 of worm screw radial deflection; Arrive AP, the BQ position among the figure after carrying out the G32 program, and then carry out the circular interpolation motion, cut a stature.The back adjustment #3 that finishes can carry out other cutting.Adjustment speed ratio and centre-to-centre spacing parameter can be carried out corresponding grinding allowance homogenizing and handled.
Claims (10)
1. method for turning based on the helical surface of enveloping worm of centre numerically controlled lathe; It is characterized in that endless screw apparatus is located on the centre numerically controlled lathe; Root circle of worm arc radius is that Rf1, tooth top arc radius are that Ra1, base radius are that rb, cutoff tool main cutting edge width are L in mid-plane, and PM, NQ are respectively the projection that the worm screw tooth form of axial direction extends left side and right flank behind the tooth; It is S that the worm screw rotating speed is set, and moves top, cutoff tool right side sword to some M, carries out one section after worm screw screw chasing program radially; Is that radius carries out the circular interpolation motion with Ra1, processes a helix of left flank, tool motion to M ' point afterwards along worm screw withdrawing radially; Move top, cutter left side sword to the N point, carry out after one section screw chasing program still Ra1 once more and be radius and carry out circular interpolation and move to N ' point, cut a helix of right flank; The speed of twice circular interpolation is consistent, moves right top sword behind the cutter withdrawing to the E point, makes radius of clean-up increase to R; Still carrying out same screw chasing program, is that radius carries out circular interpolation to E ' point then with R, moves top, left side sword behind the withdrawing to the F point; Carrying out after the same screw chasing instruction still is that radius carries out circular interpolation to F ' point with R, and the interpolation rate of this twice circular interpolation and have unequal angular velocity preceding twice is along with the increasing gradually of radius of clean-up; Right top sword is along MP; Top, left side sword constantly advances the cutting helicoid respectively along NQ, and when radius of clean-up reaches Rf1, i.e. turning goes out whole helicoid.
2. the method for turning of a kind of helical surface of enveloping worm based on centre numerically controlled lathe according to claim 1 is characterized in that: the permanent rotating speed of main shaft in the turning process of helicoid.
3. the method for turning of a kind of helical surface of enveloping worm based on centre numerically controlled lathe according to claim 1, it is characterized in that: circular interpolation angular speed is identical when cutting the helicoid feed at every turn.
4. the method for turning of a kind of helical surface of enveloping worm based on centre numerically controlled lathe according to claim 1, it is characterized in that: screw chasing program terminal point is confirmed the start angle of helicoid cutting process worm screw at circumferencial direction.
5. according to the method for turning of claim 1 or 4 described a kind of helical surface of enveloping worm based on centre numerically controlled lathe, it is characterized in that: described screw chasing program is carried out the parted hair of worm screw through the adjustment start angle.
6. the method for turning of a kind of helical surface of enveloping worm based on centre numerically controlled lathe according to claim 1 is characterized in that cutoff tool adopts common machine folder cutoff tool.
7. the method for turning of a kind of helical surface of enveloping worm based on centre numerically controlled lathe according to claim 1 can carry out the grinding allowance homogenizing after it is characterized in that changing in the screw chasing program gearratio, base radius.
8. the method for turning of a kind of helical surface of enveloping worm based on centre numerically controlled lathe according to claim 1 is characterized in that: the main cutting edge Breadth Maximum L ' of cutoff tool, the computational methods of front cutting edge minimum length l are following:
If speed ratio i, number of threads z1, reference circle of wormwheel radius R 2, reference circle of worm axial tooth thickness s2, grinding allowance n, the then pairing central angle of gullet base on the root circle:
g＝((1/i/z1-(s2+n)/R2/2/3.14)*360+2*(Acos(rb/R2)-Acos(rb/Rf1))
So: L '=rb-Rf1*Sin (Asin (rb/Rf1)-g)
l＝Sqrt(Rf1^2-rb^2)-Sqrt(Ra1^2-rb^2)
9. the method for turning of a kind of helical surface of enveloping worm based on centre numerically controlled lathe according to claim 1; It is characterized in that: screw rod is the enveloping worm that outside circle is not repaired; If worm screw working portion length L w, for fear of collapsing cutter, the computational methods of its start radius R0 are following:
R0＝Sqrt(Ra1^2-(Lw/2)^2+(Lw/2-L)^2)
10. the method for turning of a kind of helical surface of enveloping worm based on centre numerically controlled lathe according to claim 1 is characterized in that described worm screw is that centre-to-centre spacing 125, number of threads 1, gearratio 33, root circle of worm arc radius 103.87, tip circle of worm arc radius 94.32, reference circle of wormwheel radius 98.5, worm screw working portion length 58, base radius 40, reference circle of worm axial tooth thickness 8.24, grinding allowance are 0.3 dextrorotation planar double-enveloping worm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480918A (en) * | 2013-09-06 | 2014-01-01 | 马鞍山经纬回转支承有限公司 | Manufacturing method for double-modulus worm double-enveloping toroidal worm gear pair |
| CN106064255A (en) * | 2016-07-26 | 2016-11-02 | 上海合纵重工机械有限公司 | A kind of method being homogenized planar double enveloping worm flank of tooth grinding allowance |
| CN106270812A (en) * | 2016-08-30 | 2017-01-04 | 中钢集团西安重机有限公司 | A kind of method of lathe in machining helical surface of enveloping worm |
| CN113941741A (en) * | 2021-11-16 | 2022-01-18 | 天津理工大学 | Processing method of homogenization allowance curved surface of multi-head double-conical enveloping worm |
| CN114147240A (en) * | 2021-10-26 | 2022-03-08 | 内蒙古北方重工业集团有限公司 | Non-equal-division multi-head small-pitch inner spiral surface scribing method |
| 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101774029A (en) * | 2009-12-28 | 2010-07-14 | 中国农业大学 | Method for turning helical surface of enveloping worm |
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- 2011-10-18 CN CN2011103160649A patent/CN102335753A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101774029A (en) * | 2009-12-28 | 2010-07-14 | 中国农业大学 | Method for turning helical surface of enveloping worm |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480918A (en) * | 2013-09-06 | 2014-01-01 | 马鞍山经纬回转支承有限公司 | Manufacturing method for double-modulus worm double-enveloping toroidal worm gear pair |
| CN106064255A (en) * | 2016-07-26 | 2016-11-02 | 上海合纵重工机械有限公司 | A kind of method being homogenized planar double enveloping worm flank of tooth grinding allowance |
| CN106064255B (en) * | 2016-07-26 | 2018-05-18 | 上海合纵重工机械有限公司 | A kind of method for being homogenized planar double enveloping worm flank of tooth grinding allowance |
| CN106270812A (en) * | 2016-08-30 | 2017-01-04 | 中钢集团西安重机有限公司 | A kind of method of lathe in machining helical surface of enveloping worm |
| CN106270812B (en) * | 2016-08-30 | 2018-08-03 | 中钢集团西安重机有限公司 | A kind of method of lathe in machining helical surface of enveloping worm |
| CN114147240A (en) * | 2021-10-26 | 2022-03-08 | 内蒙古北方重工业集团有限公司 | Non-equal-division multi-head small-pitch inner spiral surface scribing method |
| CN114147240B (en) * | 2021-10-26 | 2024-02-06 | 内蒙古北方重工业集团有限公司 | Non-equally divided multi-head small-pitch internal spiral surface cutting processing method |
| CN113941741A (en) * | 2021-11-16 | 2022-01-18 | 天津理工大学 | Processing method of homogenization allowance curved surface of multi-head double-conical enveloping worm |
| CN113941741B (en) * | 2021-11-16 | 2022-08-05 | 天津理工大学 | Processing method of homogenization allowance curved surface of multi-head double-conical enveloping worm |
| 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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Application publication date: 20120201 |