CN104400164A - Control device capable of automatically controlling constant cutting depth for electric spark wire cutting machine tool - Google Patents
Control device capable of automatically controlling constant cutting depth for electric spark wire cutting machine tool Download PDFInfo
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- CN104400164A CN104400164A CN201410595111.1A CN201410595111A CN104400164A CN 104400164 A CN104400164 A CN 104400164A CN 201410595111 A CN201410595111 A CN 201410595111A CN 104400164 A CN104400164 A CN 104400164A
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- voltage
- control device
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- electric spark
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/14—Electric circuits specially adapted therefor, e.g. power supply
- B23H7/18—Electric circuits specially adapted therefor, e.g. power supply for maintaining or controlling the desired spacing between electrode and workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/14—Electric circuits specially adapted therefor, e.g. power supply
- B23H7/20—Electric circuits specially adapted therefor, e.g. power supply for programme-control, e.g. adaptive
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention discloses a control device capable of automatically controlling the constant cutting depth for an electric spark wire cutting machine tool. The control device comprises a PIC (Programmable Interrupt Controller) single-chip microcomputer controller, a detection circuit, a stepping motor and a wire cutting power supply, wherein the stepping motor is controlled by the PIC single-chip microcomputer controller through an output port; the detection circuit is connected with an input port of the PIC single-chip microcomputer controller and is used for transmitting corresponding signals; the wire cutting power supply selects an alternating-current power supply with frequency being 10kHz, voltage being 110V and a duty ratio of 0.3. The control device capable of automatically controlling the constant cutting depth for the electric spark wire cutting machine tool is reasonable in structure, and is stable and reliable; the consistent cutting groove depth in the electric spark wire cutting processing is ensured by using an intelligent controller; the requirements of high efficient processing for large-batch production are met; the control device has relatively high popularization and application values.
Description
Technical field
The present invention relates to a kind of control device, particularly relate to a kind of control device for permanent cutting-in automatically can be controlled in electric spark linear cutting machine, belong to Wire-cut Electrical Discharge Machining technical field.
Background technology
Wire-cut Electrical Discharge Machining be a kind of contactless, without the special process method of remarkable machine cut power, the instantaneous localized hyperthermia that it produces when being and utilizing pulse spark electric discharge between wire electrode and workpiece, make the medium ionization puncture between surface of the work point of discharge, by metal molten, gasification and cutting forming.Wire-cut Electrical Discharge Machining has the advantage of many uniquenesses, can process the workpiece etc. of various difficulty processing and the material that cannot process and complicated shape.Along with developing rapidly of metal-processing industry, Electric Discharge Wire-cutting Technology have also been obtained and develops on a large scale very much.
In recent years, engine link technique is as a kind of brand-new Machining of Connecting Rod technology, few with its manufacturing procedure, can save the advantages such as finish machining equipment, saving metal material and energy, production cost be low, is widely used in Wire-cut Electrical Discharge Machining.
In current art, con-rod fracture splitting groove Wire-cut Electrical Discharge Machining is before con-rod fracture splitting, respectively cuts out a cracking stress groove in big end internal surface of hole both sides, produces a cracking region of stress concentration, is beneficial to follow-up cracking.Wherein, whether the groove depth of cracking stress groove unanimously determines the stress concentration degree in cracking process Fracture region to a great extent, is one of main factor affecting cracking strength and quality.At present, because connecting rod blank endoporus has the different of error, molybdenum filament and connecting rod initial position in actual production, want to ensure the consistent of grooving groove depth, accurate tool setting need be carried out before each processing, this has had a strong impact on production efficiency, is unfavorable for the requirement of producing highly-efficient processing in enormous quantities.
Summary of the invention
For the demand, the invention provides a kind of control device for permanent cutting-in automatically can be controlled in electric spark linear cutting machine, this control device is rational in infrastructure, reliable and stable, ensure that the groove depth of cutting in Wire-cut Electrical Discharge Machining is consistent by adopting intelligent controller, meet the requirement of producing highly-efficient processing in enormous quantities, there is larger application value.
The present invention is a kind of control device for automatically controlling permanent cutting-in in electric spark linear cutting machine, described control device is made up of PIC single chip microcomputer controller, testing circuit, stepper motor and Linear cut power supply, described PIC single chip microcomputer controller is by output port control step motor, described testing circuit connects with the input port of PIC single chip microcomputer controller and carries corresponding signal, described Linear cut power supply selected frequency 10kHz, voltage 110 V, the AC power of dutycycle 0.3.
In a preferred embodiment of the present invention, PIC18F458 singlechip chip selected by described PIC single chip microcomputer controller, and before being loaded with linear cutter in this singlechip chip, molybdenum filament feeding control program, machining state detect responder, short circuit rollback and fast fallback program, Step Motor speed control program.
In a preferred embodiment of the present invention, described testing circuit comprises gap voltage sample circuit, gap state identification circuit and voltage-frequency control circuit.
In a preferred embodiment of the present invention, described gap voltage sample circuit is made up of RC filter circuit and voltage-stabiliser tube, and the machining gap voltage signal sampled can be flowed to gap state identification circuit and voltage-frequency control circuit by this gap voltage sample circuit respectively.
In a preferred embodiment of the present invention, described gap state identification circuit is made up of voltage comparator and triode, this gap state identification circuit connects the input port of PIC single chip microcomputer controller, and convert the normal process gap voltage of identification and short circuit or arc-over voltage to corresponding state value, flow to PIC single chip microcomputer controller.
In a preferred embodiment of the present invention, described voltage-frequency control circuit is made up of photoelectrical coupler, voltage-frequency conversion chip and latch, this voltage-frequency control circuit connects PIC single chip microcomputer controller and stepper motor respectively, the machining gap voltage that receives is generated the pulse signal of different frequency by it, and under the signal of single-chip microcomputer drives the feeding frequency of control step motor.
Present invention is disclosed a kind of control device for permanent cutting-in automatically can be controlled in electric spark linear cutting machine, this control device is rational in infrastructure, reliable and stable, ensure that the groove depth of cutting in Wire-cut Electrical Discharge Machining is consistent by adopting intelligent controller, meet the requirement of producing highly-efficient processing in enormous quantities, there is larger application value.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is that the embodiment of the present invention is for automatically controlling the system architecture diagram of the control device of permanent cutting-in in electric spark linear cutting machine.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Fig. 1 is that the embodiment of the present invention is for automatically controlling the system architecture diagram of the control device of permanent cutting-in in electric spark linear cutting machine; This control device is made up of PIC single chip microcomputer controller, testing circuit, stepper motor and Linear cut power supply, described PIC single chip microcomputer controller is by output port control step motor, described testing circuit connects with the input port of PIC single chip microcomputer controller and carries corresponding signal, described Linear cut power supply selected frequency 10kHz, voltage 110 V, the AC power of dutycycle 0.3.
What the present invention mentioned have employed the main control module of PIC18F458 singlechip chip as whole kinetic control system for the control device that automatically can control permanent cutting-in in electric spark linear cutting machine, and before being loaded with linear cutter in this singlechip chip, molybdenum filament feeding control program, machining state detect responder, short circuit rollback and fast fallback program, Step Motor speed control program.By the control program that inside is abundant, single-chip microcomputer main control module can realize before cutting processing molybdenum filament fast feed and close to low speed feeding during workpiece; Realize the detection of machining state and response is made to corresponding machining state; Realize the fast fallback of short circuit rollback in process and completion of processing; Realize the speeding up or down process to stepper motor, to avoid stepper motor work in-process to occur step-out, thus ensure that processing steadily.
As shown in Figure 1, the testing circuit in this control device comprises gap voltage sample circuit, gap state identification circuit and voltage-frequency control circuit.Wherein, gap voltage sample circuit is made up of RC filter circuit and voltage-stabiliser tube, and the machining gap voltage signal sampled can be flowed to gap state identification circuit and voltage-frequency control circuit by respectively; This gap voltage sample circuit first obtains processing discharging gap size, then by controlling to obtain the stable process velocity of spark machined, good finished surface and machining accuracy at a suitable machining gap.Gap state identification circuit is made up of voltage comparator and triode, the gap voltage of its identifiable design normal spark electric discharge processing and short circuit or arc-over voltage; This gap state identification circuit connects the input port of PIC single chip microcomputer controller, and converts the normal process gap voltage of identification and short circuit or arc-over voltage to corresponding state value, flows to PIC single chip microcomputer controller.When gap state identification circuit identifies normal process gap voltage, first PIC single chip microcomputer controller discharges the control to stepper motor, and then drives voltage-frequency control circuit to carry out cutting feeding; When there is short-circuit condition in process, gap state identification circuit identifies from sampling voltage, and then send to PIC single chip microcomputer controller interrupt signal, singlechip controller then performs short circuit fallback action.
Voltage-frequency control circuit in the control device testing circuit that the present invention proposes is specifically responsible for the feeding of linear cutter, generate corresponding frequency according to the size of machining gap voltage to control, thus make machining gap maintain in an optimum range, to meet processing request.This voltage-frequency control circuit is made up of photoelectrical coupler, voltage-frequency conversion chip and latch, and it connects PIC single chip microcomputer controller and stepper motor respectively.The machining gap voltage sampled by gap voltage sample circuit inputs to voltage-frequency conversion chip after light-coupled isolation, voltage exports as the pulse signal to frequency after voltage-frequency transforms, the feeding frequency of control step motor under the signal of single-chip microcomputer drives, can realize the accurate control to depth of cut by the feeding umber of pulse controlling cutting processing again.The concrete control procedure of this voltage-frequency control circuit is: set up the appropriate clearance of a cutting processing, and when cutting processing is carried out, the pulse signal that control circuit can produce different frequency according to gap length carrys out control step motor; When machining gap is larger, gap voltage is just large, and voltage-frequency circuit conversion frequency is out just high, and stepper motor feeding is just fast; Otherwise when machining gap is less, gap voltage is just little, and the frequency converted is just low, stepper motor feeding is just slow.
Present invention is disclosed a kind of control device for permanent cutting-in automatically can be controlled in electric spark linear cutting machine, this control device is rational in infrastructure, reliable and stable, ensure that the groove depth of cutting in Wire-cut Electrical Discharge Machining is consistent by adopting intelligent controller, meet the requirement of producing highly-efficient processing in enormous quantities, there is larger application value.
The above; be only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the technical scope disclosed by the present invention; the change can expected without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.
Claims (6)
1. one kind for automatically controlling the control device of permanent cutting-in in electric spark linear cutting machine, it is characterized in that, described control device is made up of PIC single chip microcomputer controller, testing circuit, stepper motor and Linear cut power supply, described PIC single chip microcomputer controller is by output port control step motor, described testing circuit connects with the input port of PIC single chip microcomputer controller and carries corresponding signal, described Linear cut power supply selected frequency 10kHz, voltage 110 V, the AC power of dutycycle 0.3.
2. the control device for permanent cutting-in automatically can be controlled in electric spark linear cutting machine according to claim 1, it is characterized in that, PIC18F458 singlechip chip selected by described PIC single chip microcomputer controller, and before being loaded with linear cutter in this singlechip chip, molybdenum filament feeding control program, machining state detect responder, short circuit rollback and fast fallback program, Step Motor speed control program.
3. the control device for automatically controlling permanent cutting-in in electric spark linear cutting machine according to claim 1, it is characterized in that, described testing circuit comprises gap voltage sample circuit, gap state identification circuit and voltage-frequency control circuit.
4. the control device for permanent cutting-in automatically can be controlled in electric spark linear cutting machine according to claim 3, it is characterized in that, described gap voltage sample circuit is made up of RC filter circuit and voltage-stabiliser tube, and the machining gap voltage signal sampled can be flowed to gap state identification circuit and voltage-frequency control circuit by this gap voltage sample circuit respectively.
5. the control device for permanent cutting-in automatically can be controlled in electric spark linear cutting machine according to claim 3, it is characterized in that, described gap state identification circuit is made up of voltage comparator and triode, this gap state identification circuit connects the input port of PIC single chip microcomputer controller, and convert the normal process gap voltage of identification and short circuit or arc-over voltage to corresponding state value, flow to PIC single chip microcomputer controller.
6. the control device for permanent cutting-in automatically can be controlled in electric spark linear cutting machine according to claim 3, it is characterized in that, described voltage-frequency control circuit is made up of photoelectrical coupler, voltage-frequency conversion chip and latch, this voltage-frequency control circuit connects PIC single chip microcomputer controller and stepper motor respectively, the machining gap voltage that receives is generated the pulse signal of different frequency by it, and under the signal of single-chip microcomputer drives the feeding frequency of control step motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410595111.1A CN104400164A (en) | 2014-10-30 | 2014-10-30 | Control device capable of automatically controlling constant cutting depth for electric spark wire cutting machine tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410595111.1A CN104400164A (en) | 2014-10-30 | 2014-10-30 | Control device capable of automatically controlling constant cutting depth for electric spark wire cutting machine tool |
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| CN104400164A true CN104400164A (en) | 2015-03-11 |
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| CN201410595111.1A Pending CN104400164A (en) | 2014-10-30 | 2014-10-30 | Control device capable of automatically controlling constant cutting depth for electric spark wire cutting machine tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159983A (en) * | 2017-06-30 | 2017-09-15 | 自贡市嘉特数控机械制造有限公司 | Electric spark linear cutting machine feed processing unit (plant) and method |
| CN109108412A (en) * | 2018-10-16 | 2019-01-01 | 南京航空航天大学无锡研究院 | Based on universal frequency converter to-and-fro thread feed electric spark wire-electrode cutting machine electric control system |
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| CN101254559A (en) * | 2008-04-08 | 2008-09-03 | 哈尔滨工业大学 | Numerical control electrospark wire-electrode cutting processing gapping place crest voltage regulating device |
| US20120048833A1 (en) * | 2010-08-26 | 2012-03-01 | Fanuc Corporation | Wire electric discharge machine capable of detecting machining state |
| CN202271058U (en) * | 2011-10-10 | 2012-06-13 | 江门职业技术学院 | High-frequency encoding oscillating plate |
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2014
- 2014-10-30 CN CN201410595111.1A patent/CN104400164A/en active Pending
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| CN101254559A (en) * | 2008-04-08 | 2008-09-03 | 哈尔滨工业大学 | Numerical control electrospark wire-electrode cutting processing gapping place crest voltage regulating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159983A (en) * | 2017-06-30 | 2017-09-15 | 自贡市嘉特数控机械制造有限公司 | Electric spark linear cutting machine feed processing unit (plant) and method |
| CN109108412A (en) * | 2018-10-16 | 2019-01-01 | 南京航空航天大学无锡研究院 | Based on universal frequency converter to-and-fro thread feed electric spark wire-electrode cutting machine electric control system |
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Application publication date: 20150311 |
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