CN203738176U - Tension control device of wire cutting machine and wire cutting machine - Google Patents
Tension control device of wire cutting machine and wire cutting machine Download PDFInfo
- Publication number
- CN203738176U CN203738176U CN201320593824.5U CN201320593824U CN203738176U CN 203738176 U CN203738176 U CN 203738176U CN 201320593824 U CN201320593824 U CN 201320593824U CN 203738176 U CN203738176 U CN 203738176U
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- China
- Prior art keywords
- guide wheel
- tenslator
- wire cutting
- cutting machine
- tension
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Abstract
The utility model relates to a tension control device of a wire cutting machine and the wire cutting machine. The tension control device comprises an electrode wire tension exertion mechanism, wherein the electrode wire tension exertion mechanism is an automatic linear tension adjustment mechanism; the tension control device can realize continuous and adjustable control of the tension of the electrode wire during the machining process, so as to actively adjust the tension in a linear manner and ensure the machining accuracy of a workpiece. The tension control device is relatively simple to operate, and is relatively fast in response on tension requirement, thereby being capable of greatly increasing the production efficiency.
Description
Technical field
The utility model relates generally to line discharge cutting processing (WEDM) technology, the particularly tenslator of wire cutting machine and comprise the wire cutting machine of this tenslator, and relate more specifically to reciprocating wire-moving cutting machine and adjust control device and the control method thereof of the tension force of wire electrode between various processing.
Background technology
At present, the use of wire cutting machine in manufacturing industry is more and more extensive.Wire cutting machine is divided into two types conventionally, that is: unidirectional wire cutting machine and reciprocating wire-moving cutting machine.Reciprocating wire-moving cutting machine has two kinds in the basic structure aspect the tension force control of silk: Weight type constant tension mechanism and spring tension mechanism.
Prior art document EP1034872B1 has introduced a kind of Weight type constant tension mechanism for wire cutting machine, and its structural representation as shown in Figure 1.In this mechanism, weight 116 is connected with slide block 111 via the rope that is wound in pulley 113.Therefore, weight 116 can drive slide block 111 to do horizontal movement along guide rail 114.Weight 116 is made up of multiple dismountable weights.Can adjust by changing the quantity of weight the weight of weight 116, thus the tension force of corrective action on wire electrode 3.Described document mode is by reference incorporated to for reference herein.
Prior art document CN2671732Y has introduced a kind of tension device for quick walk wire electric spark line cutter, specifically a kind of spring tension mechanism, and its structural representation is as shown in Figure 2.Adjusting device 7 is carried out the tension force of regulating action on wire electrode 10 by the tensioning degree that regulates the spring 8 being connected with slide block 14.Described document mode is by reference incorporated to for reference herein.
One of shortcoming that these two kinds of tension mechanisms have is that work in-process tension force is uncontrollable.Owing to adopting reciprocating wire-moving cutting machine, work in-process exists wire electrode discharge loss.Along with the passing of process time, the string diameter of wire electrode reduces gradually.When electronic wire loss is to a certain extent time, under the effect of tension force, there will be fracture of wire phenomenon, thereby affect the service life of wire electrode.In addition, the tension force in mentioned strain mechanism can not regulate continuously.For same procedure, under different processing conditions, required tension force is different.When adopting large electric current to add man-hour, the wire electrode tension needing is less, to avoid wire electrode fracture of wire.When carrying out Xiu Qiejia man-hour, the wire electrode tension needing is larger, to meet the requirement of machining accuracy.
Prior art document CN1706581A has introduced a kind of HS-WEDM auto-compensation strainer, as shown in Figure 3.This strainer adopts interchange toothed gearing electric motor pressure regulation means to carry out tension force control, but voltage wherein becomes non-linear relation with motor torque, and adjusting range is limited.Described document mode is by reference incorporated to for reference herein.
In addition, prior art document CN102416510A has introduced a kind of line cutting molybdenum wire tension automatic control system and tension control method, as shown in Figure 4.This tension control method adopts stepper motor to drive leading screw, and by the tension force of tension pick-up test electrode silk, thereby control step motor drives slippage guide wheel to complete the tensioning control of wire electrode through leading screw after single-chip microcomputer calculates relatively.But what this method adopted is a kind of Passive Control means, its response speed is slower, and only can play a tight silk effect, can not meet the demand that becomes tension force control.Described document mode is by reference incorporated to for reference herein.
Therefore, in this area, there is the demand for improved tenslator and control method thereof.
Utility model content
In order to solve technical problem mentioned above, the utility model provides a kind of tenslator of improved wire cutting machine.
According to one side of the present utility model, provide following technical scheme: a kind of tenslator of wire cutting machine, described tenslator comprises wire electrode tension applying mechanism, and wherein, described wire electrode tension applying mechanism is auto linear governing mechanism of tension.
In technique scheme, described auto linear governing mechanism of tension comprises the direct current generator and the straining pulley being connected with described motor for controlling tension force, and wherein said motor applies linear adjustable torque to described straining pulley.
In technique scheme, described auto linear governing mechanism of tension also comprises host computer, single-chip microcomputer and current detection circuit, wherein said host computer is controlled electric current by described single-chip microcomputer to the output of described current detection circuit, described current detection circuit according to described control electric current and from the feedback current of described motor to described motor output function electric current.
In technique scheme, described current detection circuit comprises comparing unit and pulse width modulation controlled unit, wherein said comparing unit is compared described control electric current and described feedback current, and the result of described comparison produces pulse-width modulation waveform by described pulse width modulation controlled unit.
In technique scheme, described current detection circuit also comprises power amplifier, and described pulse-width modulation waveform is amplified by described power amplifier.
In technique scheme, described tenslator comprises rail plate or the leading screw on the column that is arranged on wire cutting machine and is arranged on the slide block on described rail plate or leading screw, and wherein said straining pulley is connected with described slide block through jockey.
In technique scheme, described tenslator also comprise be arranged on described column determine guide wheel, be arranged on the moving guide wheel on described slide block and be arranged on from shown in arm guide wheel the column upper arm and the underarm that stretch out, wherein determine guide wheel, described moving guide wheel and described arm guide wheel and form closed-loop path via described by the wire electrode of wire cutting machine.
In technique scheme, describedly determine guide wheel and be arranged between described moving guide wheel and described arm guide wheel.
In technique scheme, described straining pulley is the wheel of a pair of left and right sides that is arranged on described rail plate, shown in determine the wheel that guide wheel is a pair of both sides up and down that are arranged on described rail plate, described moving guide wheel is the wheel at the two ends of slide block shown in a pair of being arranged on, and describedly determines guide wheel and is arranged in the horizontal direction between described moving guide wheel and described arm guide wheel.
In technique scheme, described auto linear governing mechanism of tension is hydraulic system.
In technique scheme, described tenslator comprises rail plate or the leading screw on the column that is arranged on wire cutting machine and is arranged on the slide block on described rail plate or leading screw, and wherein said hydraulic system is connected with described slide block.
In technique scheme, described tenslator also comprises and is arranged on determining guide wheel, be arranged on the moving guide wheel on described slide block and be arranged on the arm guide wheel upper arm and the underarm stretching out from described column on described column, and wherein the wire electrode of wire cutting machine is determined guide wheel, described moving guide wheel and described arm guide wheel and formed closed-loop path via described.
In technique scheme, describedly determine guide wheel and be arranged between described moving guide wheel and described arm guide wheel.
In technique scheme, describedly determine the wheel that guide wheel is a pair of both sides up and down that are arranged on described rail plate, described moving guide wheel is the wheel at a pair of two ends that are arranged on described slide block, describedly determines guide wheel and is arranged in the horizontal direction between described moving guide wheel and described arm guide wheel.
According on the other hand of the present utility model, also provide following technical scheme: a kind of wire cutting machine, wherein, described wire cutting machine comprises according to the tenslator described in any in aforementioned techniques scheme.
Compared with prior art, the beneficial effect that the tenslator of wire cutting machine of the present utility model possesses is: described tenslator can be realized the tension force of continuous adjustable ground control electrode silk in process, and tension force described in linear regulation on one's own initiative, ensured the machining accuracy of workpiece simultaneously.In addition, operation of the present utility model is more simple, faster for the response of tension requirements, thereby can significantly improve production efficiency.
Brief description of the drawings
Below coming by reference to the accompanying drawings to describe in more detail preferred embodiment of the present utility model.
Fig. 1-4 show respectively various tension control mechanism of the prior art.
Fig. 5 is the functional block diagram of tenslator of the present utility model.
Fig. 6 is the schematic side elevation of the structure of tenslator of the present utility model.
Fig. 7 is tension force control curve map of the present utility model.
Fig. 8 is the schematic side elevation of another embodiment of the structure of tenslator of the present utility model.
Detailed description of the invention
With reference to accompanying drawing, 5-8 describes specific embodiment of the utility model in detail.Only, as example, introduce the utility model in connection with two-way wire or reciprocating wire-moving cutting machine (also referred to as fast wire edm cutter).
With reference to figure 5, show according to the functional block diagram of the tenslator of exemplary embodiment of the present utility model.Tenslator of the present utility model is taking direct current generator theory of torque control as basis.Particularly, tenslator of the present utility model has wire electrode tension applying mechanism.This wire electrode tension applying mechanism is a kind of auto linear governing mechanism of tension, its mainly comprise the direct current generator M2 of host computer (PC), single-chip microcomputer (μ P), current detection circuit, control tension force and the straining pulley 2(that is connected with motor M 2 as shown in Figure 6).In described governor motion, host computer provides tension force instruction, and single-chip microcomputer is as the platform that receives tension force instruction and control tension force, and current detection circuit is to motor M 2 output function electric currents.As shown in Figure 5, host computer sends machined parameters to single-chip microcomputer through serial bus or other suitable bus known in the art.Single-chip microcomputer is preferably with the true constant tension control electric current I of lookup table mode
g.Current detection circuit can comprise comparing unit, and it is by tension force control electric current I
gwith feedback current I
fcompare.Current detection circuit can also comprise pulsewidth modulation (PWM) control module, and the result of described comparison can produce PWM waveform by PWM control module.Current detection circuit can also comprise power amplifier, and the PWM waveform producing can amplify to produce the constant current for the armature of motor M 2 through this power amplifier.Preferably permanent magnet DC motor of motor M 2.
Because the motor M 2 adopting is permanent magnet DC motors, therefore according to direct current generator theory, the torque acting on the axle of motor M 2 is:
M=Cm?I
a?（Nm）
Wherein, Cm is torque constant; For the magnetic flux of every utmost point; I
afor armature supply.
Because the characterisitic parameter Cm of permanent magnet DC motor and be constant, so torque M and armature supply I
aproportional.By given different armature supply I
a, just can be exported accordingly torque M.Therefore, offer the armature supply I of motor M 2
abe linear adjustable, therefore the output torque M of motor M 2 is also linear adjustable.
The utility model is realized according to this principle exactly.In process, can change according to different processing conditions and machining state, provide corresponding tension force control electric current I by single-chip microcomputer
gcarry out in real time tension force control and the adjustment of wire electrode.
Fig. 6 shows the schematic mechanical construction drawing for the tenslator 1 of the wire electrode of wire cutting machine of the present utility model.Described tenslator 1 is preferably arranged on the lathe bed (not shown) of wire cutting machine.In the preferred embodiment as shown in the side view in Fig. 6, tenslator 1 has wire electrode tension applying mechanism as above.Described tenslator 1 preferably includes: rail plate 3; Slide block 4; Be arranged on and determine guide wheel 5 on the column (not shown) of lathe bed; Be arranged on the moving guide wheel 9 on slide block 4; And, be arranged on the arm guide wheel 10 from upper arm (not shown) and underarm (not shown) that lathe bed or column stretch out.Described wire cutting machine also comprises the wire storage cylinder 8 being preferably arranged on lathe bed and the wire storage cylinder motor M 1 being connected with wire storage cylinder 8.
In tenslator 1, motor M 2 is preferably arranged on the column of lathe bed, and it such as, is connected with slide block 4 through belt 11 or similar jockey (rope, cable etc.) by straining pulley 2.Rail plate 3 is also preferably arranged on described column.Rail plate 3 is preferably flatly located, and is preferably positioned to make the axis of its central plane and wire storage cylinder 8 to be positioned at same plane.Rail plate 3 can be two-sided or one side rolling guide.Thereby slide block 4 is arranged on rail plate 3 and can slides along rail plate 3.Described straining pulley 2 is preferably the wheel of a pair of left and right sides that is arranged on rail plate 3.Determine the wheel that guide wheel 5 is preferably a pair of both sides up and down that are arranged on rail plate 3.Describedly determine guide wheel 5 and be preferably arranged in the horizontal direction between moving guide wheel 9 and arm guide wheel 10.Describedly determine guide wheel 5 and preferably arrange symmetrically with respect to rail plate 3.Moving guide wheel 9 is preferably the wheel at a pair of two ends that are arranged on slide block 4.Wire electrode 7 is derived by wire storage cylinder 8, and forms closed-loop path via determining guide wheel 5, moving guide wheel 9 and arm guide wheel 10.Wire electrode 7 between arm guide wheel 10 on upper arm and underarm is implemented the processing of line discharge cutting to workpiece 6.The quantity that should be appreciated that the various parts in tenslator 1 can suitably be selected according to being specifically used for, and is not limited to described specific embodiment.In addition, the relative position relation of all parts in tenslator 1 also can change as required and correspondingly.
In another embodiment, motor M 2 can be connected with screw mechanism (not shown), thereby screw mechanism drives for example slide block 4 to regulate linearly the tension force of wire electrode 7.
In the time that motor M 2 produces linear adjustable torque M, described torque M applies tensile force f by belt 11 to slide block 4 via straining pulley 2
b, this tensile force f
bfor:
F
b=2M/D，
Wherein D is the diameter of straining pulley 2.
Under the effect of the moving guide wheel 9 on slide block 4, produce corresponding tension force F (N) on wire electrode 7, this tension force is:
F(N)?=?F
b/4?=?M/(2D)?=?Cm?I
a/(2D)，
This equation shows tension force F (N) and armature supply I
abe directly proportional, and be inversely proportional to the diameter D of straining pulley 2.
In one embodiment, the nominal torque of permanent magnet dc motor of the present utility model is preferably 2Nm, and rated current is preferably 5A, and the diameter D of straining pulley is preferably 0.09m.When armature supply is in the time that 0 arrives in the scope of 5A, the control range of the tension force F (N) of wire electrode 7 is at 0 to 11 N (i.e. gravity of the mass formation of about 1.1kg), as shown in Figure 7.Fig. 7 shows tension force control curve map, and the abscissa representative in figure is by the electric current (unit: A) of wire electrode 7, and ordinate represents the tension force (unit: N) of wire electrode 7.As can be seen from Figure 7, in the process of implementing at the utility model, the accurately tension force of linear regulation wire electrode.
With reference to figure 8, show according to the schematic mechanical construction drawing of the tenslator 1 of the wire electrode of the wire cutting machine of the utility model alternate embodiment.Structure shown in Fig. 8 is similar to the structure shown in Fig. 6, and wherein identical parts are marked by identical Reference numeral.In the structure shown in Fig. 8, foregoing wire electrode tension applying mechanism is specifically realized by hydraulic system, that is: shown in Fig. 6, straining pulley 2 and the motor M 2 in structure is replaced by hydraulic system 12.This hydraulic system 12 can be the hydraulic system of this area common type.Slide block 4 for example can be connected to the piston rod 14 in the hydraulic cylinder 13 of hydraulic system.The control instruction that hydraulic control circuit can provide according to host computer is carried out the linear pressure putting on piston rod 14 of adjusting in real time, thereby realizes the Linear Driving to slide block 4, and then realizes the linearity adjustment of the tension force to wire electrode 7.Should be appreciated that and have various hydraulic systems or hydraulic control circuit.Those skilled in the art can reasonably select according to the needs of practical application the detailed description of the invention of hydraulic system.Owing to having adopted hydraulic technique, therefore tenslator has good control performance, can correctly control with very high response speed, thereby have good response characteristic.
Should be appreciated that the utility model is equally also applicable to the wire electrode tension control of unidirectional wire cutting machine.
Although illustrate with reference to accompanying drawing and described preferred embodiment of the present utility model, should be appreciated that such embodiment only provides by way of example.The utility model is not intended to be limited to any specific embodiment, and is intended to contain various remodeling, modification and of equal value replacement in the scope that falls into claims.
Claims (15)
1. a tenslator for wire cutting machine, described tenslator comprises wire electrode tension applying mechanism, it is characterized in that, described wire electrode tension applying mechanism is auto linear governing mechanism of tension.
2. the tenslator of wire cutting machine according to claim 1, it is characterized in that, described auto linear governing mechanism of tension comprises the direct current generator and the straining pulley being connected with described motor for controlling tension force, and wherein said motor applies linear adjustable torque to described straining pulley.
3. the tenslator of wire cutting machine according to claim 2, it is characterized in that, described auto linear governing mechanism of tension also comprises host computer, single-chip microcomputer and current detection circuit, wherein said host computer is controlled electric current by described single-chip microcomputer to the output of described current detection circuit, described current detection circuit according to described control electric current and from the feedback current of described motor to described motor output function electric current.
4. the tenslator of wire cutting machine according to claim 3, it is characterized in that, described current detection circuit comprises comparing unit and pulse width modulation controlled unit, wherein said comparing unit is compared described control electric current and described feedback current, and the result of described comparison produces pulse-width modulation waveform by described pulse width modulation controlled unit.
5. the tenslator of wire cutting machine according to claim 4, is characterized in that, described current detection circuit also comprises power amplifier, and described pulse-width modulation waveform is amplified by described power amplifier.
6. the tenslator of wire cutting machine according to claim 5, it is characterized in that, described tenslator comprises rail plate or the leading screw on the column that is arranged on wire cutting machine and is arranged on the slide block on described rail plate or leading screw, and wherein said straining pulley is connected with described slide block through jockey.
7. the tenslator of wire cutting machine according to claim 6, it is characterized in that, described tenslator also comprises and is arranged on determining guide wheel, be arranged on the moving guide wheel on described slide block and be arranged on the arm guide wheel upper arm and the underarm stretching out from described column on described column, and wherein the wire electrode of wire cutting machine is determined guide wheel, described moving guide wheel and described arm guide wheel and formed closed-loop path via described.
8. the tenslator of wire cutting machine according to claim 7, is characterized in that, describedly determines guide wheel and is arranged between described moving guide wheel and described arm guide wheel.
9. the tenslator of wire cutting machine according to claim 8, it is characterized in that, described straining pulley is the wheel of a pair of left and right sides that is arranged on described rail plate, describedly determine the wheel that guide wheel is a pair of both sides up and down that are arranged on described rail plate, described moving guide wheel is the wheel at a pair of two ends that are arranged on described slide block, describedly determines guide wheel and is arranged in the horizontal direction between described moving guide wheel and described arm guide wheel.
10. the tenslator of wire cutting machine according to claim 1, is characterized in that, described auto linear governing mechanism of tension is hydraulic system.
The tenslator of 11. wire cutting machines according to claim 10, it is characterized in that, described tenslator comprises rail plate or the leading screw on the column that is arranged on wire cutting machine and is arranged on the slide block on described rail plate or leading screw, and wherein said hydraulic system is connected with described slide block.
The tenslator of 12. wire cutting machines according to claim 11, it is characterized in that, described tenslator also comprises and is arranged on determining guide wheel, be arranged on the moving guide wheel on described slide block and be arranged on the arm guide wheel upper arm and the underarm stretching out from described column on described column, and wherein the wire electrode of wire cutting machine is determined guide wheel, described moving guide wheel and described arm guide wheel and formed closed-loop path via described.
The tenslator of 13. wire cutting machines according to claim 12, is characterized in that, describedly determines guide wheel and is arranged between described moving guide wheel and described arm guide wheel.
The tenslator of 14. wire cutting machines according to claim 13, it is characterized in that, describedly determine the wheel that guide wheel is a pair of both sides up and down that are arranged on described rail plate, described moving guide wheel is the wheel at a pair of two ends that are arranged on described slide block, describedly determines guide wheel and is arranged in the horizontal direction between described moving guide wheel and described arm guide wheel.
15. 1 kinds of wire cutting machines, is characterized in that, described wire cutting machine comprises the tenslator according to wire cutting machine in any one of the preceding claims wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320593824.5U CN203738176U (en) | 2013-09-25 | 2013-09-25 | Tension control device of wire cutting machine and wire cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320593824.5U CN203738176U (en) | 2013-09-25 | 2013-09-25 | Tension control device of wire cutting machine and wire cutting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203738176U true CN203738176U (en) | 2014-07-30 |
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ID=51338039
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320593824.5U Expired - Lifetime CN203738176U (en) | 2013-09-25 | 2013-09-25 | Tension control device of wire cutting machine and wire cutting machine |
Country Status (1)
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|---|---|
| CN (1) | CN203738176U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105171153A (en) * | 2015-10-13 | 2015-12-23 | 哈尔滨理工大学 | Fast wire cutting machine tool electrode wire tension adjusting system |
| CN105834537A (en) * | 2015-01-14 | 2016-08-10 | 北京阿奇夏米尔工业电子有限公司 | Manual wire manufacturing device and wire electrical discharge machine including same |
| CN106363818A (en) * | 2016-10-18 | 2017-02-01 | 安陆鲸鱼嘴电子科技有限公司 | Low-energy-consumption high-environment-protection type denitration catalyst cutter |
| TWI643688B (en) * | 2018-03-30 | 2018-12-11 | National Taiwan Normal University | Fluid-controlled wire tension mechanism |
-
2013
- 2013-09-25 CN CN201320593824.5U patent/CN203738176U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834537A (en) * | 2015-01-14 | 2016-08-10 | 北京阿奇夏米尔工业电子有限公司 | Manual wire manufacturing device and wire electrical discharge machine including same |
| CN105834537B (en) * | 2015-01-14 | 2018-05-29 | 北京阿奇夏米尔工业电子有限公司 | Manual line preparation facilities and the line electrical discharge machining machine for including it |
| CN105171153A (en) * | 2015-10-13 | 2015-12-23 | 哈尔滨理工大学 | Fast wire cutting machine tool electrode wire tension adjusting system |
| CN106363818A (en) * | 2016-10-18 | 2017-02-01 | 安陆鲸鱼嘴电子科技有限公司 | Low-energy-consumption high-environment-protection type denitration catalyst cutter |
| TWI643688B (en) * | 2018-03-30 | 2018-12-11 | National Taiwan Normal University | Fluid-controlled wire tension mechanism |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |
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