CN105014473B

CN105014473B - Numerical control lathe

Info

Publication number: CN105014473B
Application number: CN201510525873.9A
Authority: CN
Inventors: 张利
Original assignee: Wenzhou Zhihui Intellectual Property Consulting Co Ltd
Current assignee: Wenzhou Zhihui Intellectual Property Consulting Co Ltd
Priority date: 2015-08-25
Filing date: 2015-08-25
Publication date: 2017-05-03
Anticipated expiration: 2035-08-25
Also published as: CN105014473A

Abstract

The invention discloses a numerical control lathe. The numerical control lathe comprises a rack casing as well as a lathe tool assembly and a chip removal mechanism which are arranged in the rack casing, wherein the lathe tool assembly comprises a sliding rail, a clamp arranged at one end of the sliding rail and a lathe tool which is arranged on the sliding rail and can slide on the sliding rail back and forth; the chip removal mechanism comprises an iron chip collection tank close to one side of the sliding rail, a conveying belt is arranged at the bottom of the iron chip collection tank, the output end of the conveying belt penetrates out of the rack casing, an iron chip collection box is arranged below the output end, pulleys are arranged at the bottom of the iron chip collection box, an auxiliary chip removal mechanism is further arranged in the rack casing and comprises a scraping plate and a drive assembly for driving the scraping plate to move back and forth in the rack casing, and the scraping plate is closely attached to the inner wall of the rack casing. According to the numerical control lathe, the scraping plate can be effectively driven to move back and forth in the rack casing by the drive assembly, and the inner wall of the rack casing can be effectively cleaned.

Description

A kind of numerically controlled lathe

Technical field

The present invention relates to a kind of numerical control device, more particularly to a kind of numerically controlled lathe.

Background technology

Numerically controlled lathe can produce many scrap in the various workpiece of car, in order to ensure the normal operation of lathe, numerical control lathe Bed on be accomplished by be equipped with chip removal mechanism, to work in lathe during timely the scrap produced by which is discharged, it is existing The structure of chip removal mechanism generally comprise and chip area and be arranged on the conveyer belt at flute bottom, during chip removal, produced Raw scrap is dropped in chip area, then just can be effectively by scrap from numerically controlled lathe by the operating of conveyer belt Discharge.

But existing numerically controlled lathe is that the part of required car is fixed to rotating disk by fixture during work On, rotated by driven by rotary disc parts at high speeds, then by lathe tool on slide rail sliding slowly near rotating disk, last lathe tool with Part contacts, part that thus can be required for effectively car go out, due to car during rotating disk be at a high speed rotation, because And produced scrap disorderly will fly, a part is attached on the inwall of numerically controlled lathe holster shell so that the shifting in holster shell Dynamic door is blocked when running and cannot be opened or the problem closed, and existing chip removal mechanism is merely able to the passive scrap that waits and drops to On chip area, thus the scrap being attached on holster shell inwall can not be removed well.

The content of the invention

In view of the shortcomings of the prior art, it is an object of the invention to provide one kind can effectively remove holster shell The numerically controlled lathe of scrap on inwall.

For achieving the above object, the invention provides following technical scheme：A kind of numerically controlled lathe, including holster shell and The turning tool component being arranged in holster shell and chip removal mechanism, the turning tool component include slide rail, are arranged on one end of slide rail Fixture and be arranged on slide rail can on slide rail the lathe tool of sliding back and forth, the chip removal mechanism includes arranging near slide rail side Scrap collection groove, the bottom land of the scrap collection groove is conveyer belt, and the outfan of the conveyer belt passes holster shell setting, Scrap collection box is provided with below outfan, the bottom of scrap collection box is provided with pulley, auxiliary is additionally provided with the holster shell Chip removal mechanism, the drive component that the auxiliary chip removal mechanism includes scraper plate and drives scraper plate to move back and forth in holster shell, The scraper plate is fitted with holster shell inwall setting, and the drive component includes being arranged in holster shell along slide rail length direction The fixing axle of extension, the motor for being fixed on fixing axle one end and in fixing axle sliding slide block, the slide block with scrape Plate is mutually fixed, and screw rod is coaxially fixed with the motor rotating shaft, and the screw rod is threadedly coupled with slide block, the motor On be additionally provided with drive its timing the drive circuit for rotating and reverse.

As a further improvement on the present invention, whether the drive circuit includes control circuit, timing circuit, detection scrap Cover serial communication circuit that the detection circuit of holster shell communicated with extraneous host computer and motor rotating Positive and negative rotation circuit, the serial communication circuit, detection circuit, timing circuit with control circuit couple, the timing circuit with Positive and negative rotation circuit is coupled, and positive and negative rotation circuit and motor are coupled, and the motor is direct current generator, and and positive and negative rotation circuit Coupling, the control circuit includes 51 single-chip microcomputers, and the single-chip microcomputer has an I/O mouths, the detection circuit include TCS230 chips with And be attached in holster shell for TCS230 chip detection colored ribbon, the TCS230 chips have power interface, ground interface, The I/O mouth couplings of signal output interface and signal input interface, wherein signal output interface and signal input interface with single-chip microcomputer Connect, power interface connects power supply, ground interface is grounded, and the serial communication circuit includes communication jacks and MAX232 chips, described MAX232 chips have two signal input parts and two signal output parts, one of signal input part and a signal output End is coupled with 51 single-chip microcomputers as one group, and another signal input part and signal output part are used as another group and communication jacks coupling Connect, the timing circuit includes 555 timing chips, the power pins coupling external power source of the chip, grounding pin are grounded, and which is defeated Go out pin coupling positive and negative rotation circuit；Two resistance, one of resistance are coupled to external power source and are drawn with the electric discharge of 555 timing chips Between foot, another resistance is coupled between the electric discharge pin of 555 timing chips and voltage triggered pin；Two electric capacity, wherein One electric capacity is coupled between the voltage triggered pin of 555 timing chips and ground, and another electric capacity is coupled to 555 timing chips Between control voltage pin and ground, the I/O mouths coupling of the 5th pin and 51 single-chip microcomputers of 555 timing chip, the rotating Circuit includes PMOS, and the control end of the PMOS is coupled to the output pin of 555 timing chips, and first end is just being coupled to outside Pole power supply, second rectifies the ground connection to after coupling motor；NMOS tube, the NMOS tube control end are coupled to 555 timing chips Output pin, first end ground connection, the second end reversely couples motor and is followed by external positive power supply.

As a further improvement on the present invention, the slide block offers slide opening and screwed hole, and the fixing axle passes through slide opening Arrange, the screw rod is threadedly coupled with screwed hole.

As a further improvement on the present invention, the colored ribbon is red color band.

As a further improvement on the present invention, the holster shell is provided with safety door, and the safety door includes safety door Body and the connector assembly that handles being fixed on the inside of safety door body near base, and the locating piece that is matched therewith and lock Block, a connector assembly that handles insert base, support, inserting handle and fixing axle comprising door, and the door is inserted one end of base and vertically fixed The top for having support, support is flexibly connected with inserting handle by hinge, and the door to be inserted and be provided with hole in the middle part of base, the fixing axle Spring is cased with axle body, its lower end is inserted in the hole that door is inserted on base, its upper end is provided with chock plug, and the position with the handle of inserting handle Mill out and chock plug diameter identical consent in the side of door connector assembly, chock plug and the consent piston on inserting handle of fixing axle upper end are matched somebody with somebody Close, the lower end of the locating piece is welded on lathe bed, on the inside of its upper end, be provided with closing piece, and mill out on inserting handle and match somebody with somebody with closing piece grafting The lockhole of conjunction, the lower end of the inserting handle are extended in parallel with safety door body downwards, and stretch out the bottom of safety door body.

The invention has the advantages that, by the setting of scraper plate and drive component, it is possible to effectively by driving Component thus can will be attached to holster shell inwall by scraper plate driving scraper plate to move back and forth on the inwall of holster shell On scrap scrape off, feed them in the chip area of lower section, then seen off by conveyer belt, thus can be effective Realization is cleaned up to the scrap on holster shell inwall, compared to the chip removal mechanism of prior art, with more comprehensively Clearing function, and the work that the setting for passing through control circuit just effectively can be coordinated between various pieces, by detecting circuit Setting whether just can effectively detect scrap in holster shell excessive, if scrap excessively so detects that circuit will Send detection signal to control circuit, control circuit will driving timing circuit, timing circuit will drive positive and negative rotation circuit, have The rotating for realizing motor of effect, while the setting by serial communication circuit, people can just pass through host computer pair The setting of 51 single-chip microcomputers is modified, and thus effectively can realize detecting the extension of electric circuit inspection colored ribbon, and scrap Excessive degree, so just can enable entirely to aid in the regard that chip removal mechanism preferably meets people to go work, it appears more Intellectuality.

Description of the drawings

Fig. 1 is the overall structure figure of the numerically controlled lathe of the present invention；

Fig. 2 is the overall structure figure of drive component in Fig. 1；

Circuit diagrams of the Fig. 3 for drive circuit.

Specific embodiment

With reference to shown in Fig. 1, a kind of numerically controlled lathe of the present embodiment, including holster shell 1 and be arranged in holster shell 1 Turning tool component and chip removal mechanism, the turning tool component include slide rail, be arranged on slide rail one end fixture and be arranged on cunning On rail can on slide rail the lathe tool of sliding back and forth, the chip removal mechanism includes the scrap collection groove arranged near slide rail side, institute The bottom land for stating scrap collection groove is conveyer belt, and the outfan of the conveyer belt passes holster shell 1 and arrange, set below outfan The bottom for having scrap collection box, scrap collection box is provided with pulley, and auxiliary chip removal mechanism 2 is additionally provided with the holster shell 1, described Auxiliary chip removal mechanism 2 includes the drive component 22 that scraper plate 21 and driving scraper plate 21 are moved back and forth in holster shell 1, described to scrape Plate 21 is fitted with 1 inwall of holster shell setting, and the drive component 22 includes being arranged in holster shell 1 along slide rail length direction The fixing axle 221 of extension, the motor 222 for being fixed on 221 one end of fixing axle and in fixing axle 221 sliding slide block 223, the slide block 223 is mutually fixed with scraper plate 21, and screw rod 2221, the spiral shell are coaxially fixed with 222 rotating shaft of the motor Bar 2221 is threadedly coupled with slide block 223, and the driving electricity for rotating and reverse for driving its timing is additionally provided with the motor 222 Road 5, will constantly produce scrap during lathe runs, and a part of scrap is dropped on chip removal mechanism, by chip removal Mechanism is directly discharged from holster shell 1, and another part will descend slowly and lightly on the inwall of holster shell 1, be attached to above, at this moment arrange Bits mechanism effectively cannot be cleared up to the scrap of this part, so drive component 22 will drive scraper plate 21 in frame Move back and forth in shell 1, as scraper plate 21 is fitted with 1 inwall of holster shell, so the process moved back and forth in scraper plate 21 In, the scrap being attached on 1 inwall of holster shell will be scraped off so as to drop on chip removal mechanism, with chip removal mechanism from Discharges in holster shell 1, so by the setting of auxiliary chip removal mechanism 2, it is possible to be effectively engaged with chip removal mechanism by Scrap on 1 inwall of holster shell is emitted, wherein, as shown in Fig. 2 when drive component 22 is operated, first will be solid Dead axle 221 is fixed in holster shell 1, as shown in figure 1, the fixing axle 221 is be arranged in parallel with the slide rail inside holster shell 1, Motor 222 is operated afterwards, rotates its rotary shaft, thus screw rod 2221 will be driven and rotate, at this moment due to screw rod 2221 are threadedly coupled with slide block 223, while slide block 223 is sliding be connected in fixing axle 221, so in screw rod 2221 During rotation, due to the inhibition of fixing axle 221, screw rod 2221 can not be rotated with movable slider 223, thus slide block 223 will lead to because of the rotation of screw rod 2221 sliding in fixing axle 221, so as to drive the sliding in fixing axle 221 of scraper plate 21 Rotating and reverse for motor 222 of overdriving just effectively can realize that scraper plate 21 is moved back and forth in fixing axle 221, thus can Enough effects for effectively realizing driving scraper plate 21 to move back and forth inside holster shell 1, wherein turning tool component here and chip removal Mechanism is prior art, therefore its course of work and principle are not repeated.

Used as a kind of improved specific embodiment, the drive circuit 5 includes control circuit 53, timing circuit 51, inspection Survey scrap whether cover the detection circuit 54 of holster shell 1, the serial communication circuit 55 communicated with extraneous host computer and The positive and negative rotation circuit 52 of motor rotating, the serial communication circuit 55, detection circuit 54, timing circuit 51 with control Circuit 53 is coupled, and the timing circuit 51 is coupled with positive and negative rotation circuit 52, and positive and negative rotation circuit 52 is coupled with motor 222, institute It is direct current generator to state motor 222, and is coupled with positive and negative rotation circuit 52, and the control circuit 53 includes 51 single-chip microcomputers 531, should Single-chip microcomputer 531 has I/O mouths, and the detection circuit 54 includes TCS230 chips 541 and be attached in holster shell 1 supplying The colored ribbon of the detection of TCS230 chips 541, the TCS230 chips have power interface, ground interface, signal output interface and letter Number input interface, wherein signal output interface and signal input interface are coupled with the I/O mouths of single-chip microcomputer, and power interface connects electricity Source, ground interface ground connection, the serial communication circuit 55 include communication jacks 551 and MAX232 chips 552, the MAX232 cores There is piece 552 two signal input parts and two signal output parts, one of signal input part and a signal output part to make Couple with 51 single-chip microcomputers 531 for one group, another signal input part and signal output part are used as another group and 551 coupling of communication jacks Connect, the timing circuit 51 includes 555 timing chips 511, the power pins coupling external power source of the chip, grounding pin connect Ground, its output pin couple positive and negative rotation circuit 52；Two resistance, one of resistance are coupled to external power source and 555 timing cores Between the electric discharge pin of piece 511, another resistance be coupled to the electric discharge pin of 555 timing chips 511 and voltage triggered pin it Between；Two electric capacity, one of electric capacity are coupled between the voltage triggered pin and ground of 555 timing chips 511, another electric capacity It is coupled between the control voltage pin and ground of 555 timing chips 511, the 5th pin of 555 timing chip 511 and 51 is singly The I/O mouths coupling of piece machine 531, the positive and negative rotation circuit 52 include PMOS, and the control end of the PMOS is coupled to 555 timing cores The output pin of piece, first end are coupled to external positive power supply, and second rectifies the ground connection to after coupling motor 222；NMOS tube, The NMOS tube control end is coupled to the output pin of 555 timing chips, and first end is grounded, and the second end reversely couples motor 222 are followed by external positive power supply, during the numerically controlled lathe for using, shape workpiece gradual car by turning tool component, Shape in its car, as shown in figure 3, before using auxiliary chip removal mechanism 2, being electrified drive circuit 5 first, then passing through The instruction of host computer passes through communication jacks 551, in MAX232 chips 552, after the process of MAX232 chips 552, will The signal that 51 single-chip microcomputers 531 are capable of identify that is converted instructions into, is then transmitted in 51 single-chip microcomputers 531,51 single-chip microcomputers 531 Upon receipt of this signal, internal will arrange, be then operated, colored ribbon covered when scrap is attached in holster shell 1 After lid, TCS230 chips 541 cannot just detect colored ribbon, and at this moment TCS230 chips 541 will be to the input of 51 single-chip microcomputer 531 one Individual drive signal, represents that now scrap needs to be cleared up, and such 51 single-chip microcomputer 531 will send a drive signal to timing In circuit 51,555 timing chips 511 in timing circuit 51 upon receipt of this signal, will work, in the mistake of work Cheng Zhong, first external power source will be input in the power pins of 555 timing chips 511, are powered to 555 timing chips 511, are made Obtain 555 timing chips 511 to work, the electric current of external power source arrives ground after flowing through two resistance connected and electric capacity, so electric current Will be charged to electric capacity by resistance, 2,6 interfaces wherein in figure are respectively low pressure threshold interface and HVT high voltage threshold's interface, in electricity In the charging process of appearance, the voltage at its two ends will gradually rise, when the voltage that electric capacity and 2,6 interfaces couple one end will be gradually Raise, the output high level of output interface 3, after threshold voltage of its voltage more than 6 interfaces, the output low level of output interface 3, Simultaneously opening electric discharge interface 7 makes electric capacity be discharged by resistance, and the voltage allowed on electric capacity slowly declines, when the voltage on electric capacity After dropping to 2 interface threshold values, the output high level of output interface 3, while the interface 7 that discharges is closed, electric capacity will be recharged, its Voltage above will rise again, after which is increased over the threshold voltage of 6 interfaces, will repeat in process above, The output interface 3 that thus can effectively order about 555 timing chips 511 exports a square wave, while the time cycle of the square wave Determine that the square wave will be input in positive and negative rotation circuit 52 afterwards by the resistance of the amount of capacity and resistance of electric capacity, such as in figure It is shown, as PMOS is the conducting of control end input low level, so when 555 timing chips 511 export low level, PMOS is turned on, simultaneously because the conducting of NMOS tube high level, so at this time NMOS tube is not turned on, sense of current is exactly under Up, motor 222 is driven to rotate, it is assumed that this when is rotating forward, when 555 timing chip 511 exports high level, PMOS is not turned on, and NMOS tube conducting, so as shown in FIG., sense of current will from the bottom up, and the sense of current is therewith When front PMOS is turned on completely conversely, so motor 222 at this moment turn to it is complete when will turning on PMOS It is complete conversely, thus for reversion, so during 222 rotating of motor, slide block 223 will be in fixing axle 221 back and forth Motion, so as to drive scraper plate 21 to move back and forth in holster shell 1, thus can effectively by 1 inwall of holster shell Scrap is scraped off, and realizes the cleaning to 1 inwall of holster shell, it is to avoid due to the problem that sliding door caused by scrap is blocked.

Used as a kind of improved specific embodiment, the slide block 223 offers slide opening 3 and screwed hole 4, the fixing axle 221 are arranged through slide opening 3, and the screw rod 2221 is threadedly coupled with screwed hole 4, slide block 223 in fixing axle 221 sliding when Wait, slide opening 3 will be enclosed within fixing axle 221, and anti-limited slip block 223 is departed from fixing axle 221 so that slide block 223 cannot fixed The problem of 221 sliding of axle, while just effectively can be engaged with screw rod 2221 by screwed hole 4, effectively realizes screw rod When 2221 rotation, the effect for driving slide block 223 to move back and forth in fixing axle 221.

Used as a kind of improved specific embodiment, the colored ribbon is red color band, due to the detection that the present embodiment is adopted Chip is TCS230 chips 541, and TCS230 chips 541 are a kind of color detection chips, its color for predominantly detecting have it is red, yellow, It is blue three kinds, so colored ribbon is arranged to into redness here, it is possible to will detect that red instruction is transferred to by MAX232 chips 552 In 51 single-chip microcomputers 531,51 single-chip microcomputers 531 are transferred to this instruction in TCS230 chips 541 again, at this moment TCS230 chips 541 Will start to detect red color band, when scrap is completely covered colored ribbon, mean that now scrap is excessive, then TCS230 chips 541 cannot just detect colored ribbon, thus will send drive signal to 51 single-chip microcomputers 531, so aid in chip removal Mechanism 2 just can be good at the scrap cleared up on 1 inwall of holster shell.

Used as a kind of improved specific embodiment, the holster shell 1 is provided with safety door (not shown), described Safety door includes safety door body and the connector assembly that handles being fixed on the inside of safety door body near base, and matches with which The locating piece and closing piece of conjunction, a connector assembly that handles insert base, support, inserting handle and fixing axle comprising door, and the door inserts base One end be vertically and fixedly provided with support, the top of support is flexibly connected with inserting handle by hinge, the door insert base in the middle part of be provided with Hole, is cased with spring on the axle body of the fixing axle, and its lower end is inserted in the hole that door is inserted on base, and its upper end is provided with chock plug, and The side that door connector assembly is located at the handle of inserting handle mills out and chock plug diameter identical consent, the chock plug of fixing axle upper end with insert Consent piston on handle coordinates, and the lower end of the locating piece is welded on lathe bed, and closing piece is provided with the inside of its upper end, and on inserting handle The lockhole coordinated with closing piece grafting is milled out, the lower end of the inserting handle is extended in parallel with safety door body downwards, and stretches out safety door The bottom of body, when safety door is shut, handling a connector assembly will be stuck with closing piece, so as to effectively prevent in the course of processing It is middle because of ground not level, during processing lathe bed vibrations it is larger caused by safety door slip off automatically or the work caused by artificially opening Part flies out the generation of security incident such as hurt sb.'s feelings, while the lower end of inserting handle is extended in parallel with safety door body downwards, and stretches out peace The bottom of air cock body, can effectively facilitate workman to pull back inserting handle completing processing, make closing piece cross the lockhole on inserting handle, So as to reach the purpose of unblock.

In sum, by the setting of scraper plate 21, it is possible to effectively the inwall of holster shell 1 is cleaned, and is led to Overdrive the setting of component 22, it is possible to effectively drive scraper plate 21 to move back and forth in holster shell 1, to realize cleaning frame The function of 1 inwall of shell, compares existing chip removal mechanism, with more preferable cleaning effect.

The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications Should be regarded as protection scope of the present invention.

Claims

1. a kind of numerically controlled lathe, including holster shell (1) and the turning tool component being arranged in holster shell (1) and Scrap-removing machine Structure, the turning tool component include slide rail, be arranged on slide rail one end fixture and be arranged on slide rail can be on slide rail back and forth The lathe tool of sliding, the chip removal mechanism include the scrap collection groove arranged near slide rail side, the bottom land of the scrap collection groove For conveyer belt, the outfan of the conveyer belt passes holster shell (1) setting, and scrap collection box, ferrum are provided with below outfan The bottom of bits disposable box is provided with pulley, it is characterised in that：Auxiliary chip removal mechanism (2) is additionally provided with the holster shell (1), it is described Auxiliary chip removal mechanism (2) is including scraper plate (21) and drives scraper plate (21) in the interior drive component for moving back and forth of holster shell (1) (22), the scraper plate (21) is fitted with holster shell (1) inwall setting, and the drive component (22) is including being arranged on holster shell (1) in along slide rail length direction extend fixing axle (221), be fixed on fixing axle (221) one end motor (222) and The slide block (223) of the sliding in fixing axle (221), the slide block (223) are mutually fixed with scraper plate (21), the motor (222) screw rod (2221) is coaxially fixed with rotating shaft, the screw rod (2221) is threadedly coupled with slide block (223), it is described to drive electricity The drive circuit (5) for rotating and reverse for driving its timing is additionally provided with machine (222).

2. numerically controlled lathe according to claim 1, it is characterised in that：The drive circuit (5) including control circuit (53), Whether timing circuit (51), detection scrap are covered the detection circuit (54) of holster shell (1), are communicated with extraneous host computer The positive and negative rotation circuit (52) of serial communication circuit (55) and motor rotating, the serial communication circuit (55), detection Circuit (54), timing circuit (51) are coupled with control circuit (53), the timing circuit (51) and positive and negative rotation circuit (52) coupling Connect, positive and negative rotation circuit (52) is coupled with motor (222), and the motor (222) is direct current generator, and it is electric with rotating Road (52) couples, and the control circuit (53) includes 51 single-chip microcomputers (531), and the single-chip microcomputer (531) is with I/O mouths, the detection Circuit (54) is including TCS230 chips (541) and is attached in holster shell (1) coloured silk detected for TCS230 chips (541) Band, the TCS230 chips (541) with power interface, ground interface, signal output interface and signal input interface, wherein believing Number output interface and signal input interface are coupled with the I/O mouths of single-chip microcomputer, and power interface meets power supply, ground interface ground connection, institute Serial communication circuit (55) is stated including communication jacks (551) and MAX232 chips (552), the MAX232 chips (552) have Two signal input parts and two signal output parts, one of signal input part and a signal output part are used as one group and 51 Single-chip microcomputer (531) is coupled, and another signal input part and signal output part are coupled with communication jacks (551) as another group, institute Timing circuit (51) is stated including 555 timing chips (511), the power pins coupling external power source of the chip, grounding pin are grounded, Its output pin coupling positive and negative rotation circuit (52)；Two resistance, one of resistance are coupled to external power source and 555 timing chips (511), between electric discharge pin, another resistance is coupled to the electric discharge pin and voltage triggered pin of 555 timing chips (511) Between；Two electric capacity, one of electric capacity are coupled between the voltage triggered pin and ground of 555 timing chips (511), another Electric capacity is coupled between the control voltage pin and ground of 555 timing chips (511), and the 5th of 555 timing chip (511) draws The I/O mouths coupling of foot and 51 single-chip microcomputers (531), the positive and negative rotation circuit (52) include PMOS, the control end coupling of the PMOS The output pin of 555 timing chips is connected to, first end is coupled to external positive power supply, and second rectifies to coupling motor (222) it is grounded afterwards；NMOS tube, the NMOS tube control end are coupled to the output pin of 555 timing chips, and first end is grounded, and second Reversely coupling motor (222) is followed by external positive power supply at end.

3. numerically controlled lathe according to claim 2, it is characterised in that：The slide block (223) offers slide opening (3) and screw thread Hole (4), the fixing axle (221) are arranged through slide opening (3), and the screw rod (2221) is threadedly coupled with screwed hole (4).

4. numerically controlled lathe according to claim 3, it is characterised in that：The colored ribbon is red color band.

5. numerically controlled lathe according to claim 1, it is characterised in that：The holster shell (1) is provided with safety door, described Safety door includes safety door body and the connector assembly that handles being fixed on the inside of safety door body near base, and matches with which The locating piece and closing piece of conjunction, a connector assembly that handles insert base, support, inserting handle and fixing axle comprising door, and the door inserts base One end be vertically and fixedly provided with support, the top of support is flexibly connected with inserting handle by hinge, the door insert base in the middle part of be provided with Hole, is cased with spring on the axle body of the fixing axle, and its lower end is inserted in the hole that door is inserted on base, and its upper end is provided with chock plug, and The side that door connector assembly is located at the handle of inserting handle mills out and chock plug diameter identical consent, the chock plug of fixing axle upper end with insert Consent piston on handle coordinates, and the lower end of the locating piece is welded on lathe bed, and closing piece is provided with the inside of its upper end, and on inserting handle The lockhole coordinated with closing piece grafting is milled out, the lower end of the inserting handle is extended in parallel with safety door body downwards, and stretches out safety door The bottom of body.