CN203616590U

CN203616590U - Control circuit for slide block of bender

Info

Publication number: CN203616590U
Application number: CN201320688171.9U
Authority: CN
Inventors: 谢飞; 黄德祥; 夏煜昊
Original assignee: Jiangsu Guoli Forging Machine Tool Co Ltd
Current assignee: Jiangsu Guoli Forging Machine Tool Co Ltd
Priority date: 2013-11-04
Filing date: 2013-11-04
Publication date: 2014-05-28
Anticipated expiration: 2023-11-04

Abstract

The utility model relates to a control circuit for a slide block of a bender. The control circuit includes a slide block quickly-descending circuit, a slide block slowly-descending and voltage-maintaining circuit and a voltage-releasing and returning circuit. In the slide block slowly-descending and voltage-maintaining circuit, a normally-opened contact of a pressure relay and a coil of an intermediate relay are connected between a variable speed point travel switch and a zero line in series successively. Two ends of the pressure relay are connected with a self holding contact of the intermediate relay in parallel. A second normally-opened contact of the intermediate relay is connected to a circuit loop of a voltage-maintaining time-delay time relay in series. After pressure of the slide achieves a predetermined value, the pressure relay is closed, so that the coil of the intermediate relay is powered and self holding is started. The second normally-opened contact of the intermediate relay is closed, so that the coil of the voltage-maintaining time-delay time relay is powered and starts for voltage maintenance and time delay. Predetermined pressure of the pressure relay can be adjusted and voltage maintenance and time delay can be started after the pressure reaches a pressure signaling point. Therefore, bending quality is guaranteed.

Description

A kind of control circuit of slider of bender

Technical field

The utility model relates to a kind of control circuit of slider of bender, belongs to industrial control circuit technical field.

Background technology

Bender is mainly used in the workpiece such as sheet material to carry out bending, the course of work is as follows, first be that slide block is descending fast, in the time that slide block approaches workpiece, slide block becomes descending at a slow speed, in the time that slide block patrix touches workpiece, the pressure of slide block increases workpiece bending distortion, and then slide block is wanted pressurize a period of time, last slide block release backhaul.The length of slide block dwell time regulates by pressurize time delay relay, and whether the length of dwell time can affect workpiece bending complete.

The control circuit of existing slider of bender comprises that slide block descends circuit A, slide block lower and pressurize circuit B and pressure release and backhaul circuit C slowly soon, and slide block descend circuit A soon: the normally closed delayed contact, the first normally closed contact KA2-1 of the second relay and the coil of the first relay K A1 that comprise the first normally opened contact KA1-1, the pressurize time delay relay KT1 of the second normally opened contact SA1-2, first relay of the normally closed contact SF2-1 that is connected on successively the second foot-switch between control power firestreak and zero line, universal seclector; Between the upper pile crown of the normally closed delayed contact of the lower pile crown of the normally closed contact SF2-1 of the second foot-switch and pressurize time delay relay KT1, cross-over connection has the normally opened contact SF1-1 of the first foot-switch; Between the upper pile crown of the normally closed delayed contact of the lower pile crown of the normally closed contact SF2-1 of the second foot-switch and pressurize time delay relay KT1, also cross-over connection has that the first normally opened contact KA4-1 of the 4th relay of connect successively and the time delay relay KT2's that commutates often open delayed contact; Between the lower pile crown of the first normally opened contact KA1-1 of the first relay and zero line, be in series with successively the first normally opened contact KA3-1 of the 3rd relay, the 3rd normally opened contact SA1-3 of universal seclector and the coil of the 4th relay K A4; Between the upper pile crown of the lower pile crown of the first normally opened contact KA4-1 of the 4th relay and the 3rd normally opened contact SA1-3 of universal seclector, pass through wire cross-over connection.

Slide block is lower and pressurize circuit B slowly: comprise and be connected on successively speed change point travel switch SQ2, the 4th normally opened contact SA1-4 of universal seclector and the coil of pressurize time delay relay KT1 controlled between power firestreak and zero line; Also comprise the normally closed delayed contact, the second normally closed contact KA2-2 of the second relay and the coil KA3 of the 3rd relay that are connected on successively the second normally opened contact KA3-2, the pressure release time delay relay KT3 that control the 3rd relay between power firestreak and zero line; Between the upper pile crown of the normally closed delayed contact of the lower pile crown of speed change point travel switch SQ2 and pressure release time delay relay KT3, cross-over connection has the second normally opened contact KA1-2 of the first relay.

Pressure release and backhaul circuit C: comprise being connected on successively and control the normally closed contact of the upper dead center travel switch SQ1 between power firestreak and zero line, the first normally closed contact KA3-3 of the 3rd relay, the 5th normally opened contact SA1-5, the normally closed contact SF1-2 of the first foot-switch, the first normally closed contact KA1-3 of the first relay and the coil of the second relay K A2 of universal seclector; Between the upper pile crown of the lower pile crown of the normally closed contact of upper dead center travel switch SQ1 and the normally closed contact SF1-2 of the first foot-switch, cross-over connection has the normally opened contact SF2-2 of the second foot-switch; Control the coil of often opening delayed contact and pressure release time delay relay KT3 that is also connected in series with pressurize time delay relay KT1 between power firestreak and zero line; Control the second normally closed contact KA1-4 that is also connected in series with successively the first relay between power firestreak and zero line, the 3rd normally closed contact KA2-3 of the second relay, the second normally closed contact KA3-4, the second normally opened contact KA4-2 of the 4th relay and the coil of commutation time delay relay KT2 of the 3rd relay.

There is following weak point in this control circuit: the problems such as the length of the pressurize delay time of pressurize time delay relay, by manual shift, may cause bending insufficient pressure, and sheet material bending is incomplete, bending precision is poor.

Utility model content

The purpose of this utility model is, overcome problems of the prior art, a kind of control circuit of slider of bender is provided, trigger pressurize time delay relay by the sender of pressure switch, can regulate the set pressure of pressure switch, after pressure reaches pressure sender point, enter pressurize time delay, guarantee bending quality.

For solving above technical matters, the control circuit of the utility model slider of bender, comprise that slide block descends circuit A, slide block lower and pressurize circuit B and pressure release and backhaul circuit C slowly soon, described slide block descend circuit A soon: the normally closed delayed contact, the first normally closed contact KA2-1 of the second relay and the coil of the first relay K A1 that comprise the first normally opened contact KA1-1, the pressurize time delay relay KT1 of the second normally opened contact SA1-2, first relay of the normally closed contact SF2-1 that is connected on successively the second foot-switch between control power firestreak and zero line, universal seclector; Between the upper pile crown of the normally closed delayed contact of the lower pile crown of the normally closed contact SF2-1 of the second foot-switch and pressurize time delay relay KT1, cross-over connection has the normally opened contact SF1-1 of the first foot-switch; Between the upper pile crown of the normally closed delayed contact of the lower pile crown of the normally closed contact SF2-1 of the second foot-switch and pressurize time delay relay KT1, also cross-over connection has that the first normally opened contact KA4-1 of the 4th relay of connect successively and the time delay relay KT2's that commutates often open delayed contact; Between the lower pile crown of the first normally opened contact KA1-1 of the first relay and zero line, be in series with successively the first normally opened contact KA3-1 of the 3rd relay, the 3rd normally opened contact SA1-3 of universal seclector and the coil of the 4th relay K A4; Between the upper pile crown of the lower pile crown of the first normally opened contact KA4-1 of the 4th relay and the 3rd normally opened contact SA1-3 of universal seclector, pass through wire cross-over connection; Described slide block is lower and pressurize circuit B slowly: comprise and be connected on successively speed change point travel switch SQ2, the 4th normally opened contact SA1-4 of universal seclector and the coil of pressurize time delay relay KT1 controlled between power firestreak and zero line; Also comprise the normally closed delayed contact, the second normally closed contact KA2-2 of the second relay and the coil KA3 of the 3rd relay that are connected on successively the second normally opened contact KA3-2, the pressure release time delay relay KT3 that control the 3rd relay between power firestreak and zero line; Between the upper pile crown of the normally closed delayed contact of the lower pile crown of speed change point travel switch SQ2 and pressure release time delay relay KT3, cross-over connection has the second normally opened contact KA1-2 of the first relay; Pressure release and backhaul circuit C: comprise being connected on successively and control the normally closed contact of the upper dead center travel switch SQ1 between power firestreak and zero line, the first normally closed contact KA3-3 of the 3rd relay, the 5th normally opened contact SA1-5, the normally closed contact SF1-2 of the first foot-switch, the first normally closed contact KA1-3 of the first relay and the coil of the second relay K A2 of universal seclector; Between the upper pile crown of the lower pile crown of the normally closed contact of upper dead center travel switch SQ1 and the normally closed contact SF1-2 of the first foot-switch, cross-over connection has the normally opened contact SF2-2 of the second foot-switch; Control the coil of often opening delayed contact and pressure release time delay relay KT3 that is also connected in series with pressurize time delay relay KT1 between power firestreak and zero line; Control the second normally closed contact KA1-4 that is also connected in series with successively the first relay between power firestreak and zero line, the 3rd normally closed contact KA2-3 of the second relay, the second normally closed contact KA3-4, the second normally opened contact KA4-2 of the 4th relay and the coil of commutation time delay relay KT2 of the 3rd relay; Between speed change point travel switch SQ2 and zero line, be connected in series with successively the normally opened contact of pressure switch KP and the coil of auxiliary reclay KA, the two ends of the normally opened contact of pressure switch KP are connected in parallel to the first normally opened contact KA-1 of auxiliary reclay, and the second normally opened contact KA-2 of auxiliary reclay is connected between the 4th normally opened contact SA1-4 of universal seclector and the coil of pressurize time delay relay KT1.

With respect to prior art, the utility model has been obtained following beneficial effect: slide block is crossed after speed change point, speed change point travel switch SQ2 closure, now the second normally opened contact KA-2 of auxiliary reclay is in off-state, the coil of pressurize time delay relay KT1 not electric, slide block does not enter pressurize time delay state, when the pressure of slide block is increased to after setting value, pressure switch KP closure, make the coil of auxiliary reclay KA obtain electric, the closed self-insurance of the first normally opened contact KA-1 of auxiliary reclay KA, the second normally opened contact KA-2 closure of auxiliary reclay KA makes the coil of pressurize time delay relay KT1 obtain electric, now pressurize time delay relay KT1 devotes oneself to work, carry out pressurize timing, be that pressurize timing is the effective time reaching after pressure set points, guarantee bending quality.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, accompanying drawing only provides reference and explanation use, non-in order to limit the utility model.

Fig. 1 is the schematic diagram of the control circuit of the utility model slider of bender.

In figure: SQ1. upper dead center travel switch; SQ2. speed change point travel switch; SF1. the first foot-switch; SF2. the second foot-switch; SA1. universal seclector; KA1. the first relay; KA2. the second relay; KA3. the 3rd relay; KA4. the 4th relay; KT1. pressurize time delay relay; KT2. time delay relay commutates; KT3. pressure release time delay relay; KP. pressure switch; KA. auxiliary reclay.

Embodiment

As shown in Figure 1, the control circuit of slider of bender of the present utility model comprises that slide block descends circuit A, slide block lower and pressurize circuit B and pressure release and backhaul circuit C slowly soon.

Slide block descends circuit A soon: the normally closed delayed contact, the first normally closed contact KA2-1 of the second relay and the coil of the first relay K A1 that comprise the first normally opened contact KA1-1, the pressurize time delay relay KT1 of the second normally opened contact SA1-2 of being connected on successively normally closed contact SF2-1, the universal seclector of controlling the second foot-switch between power firestreak and zero line, the first relay; Between the upper pile crown of the normally closed delayed contact of the lower pile crown of the normally closed contact SF2-1 of the second foot-switch and pressurize time delay relay KT1, cross-over connection has the normally opened contact SF1-1 of the first foot-switch; Between the upper pile crown of the normally closed delayed contact of the lower pile crown of the normally closed contact SF2-1 of the second foot-switch and pressurize time delay relay KT1, also cross-over connection has that the first normally opened contact KA4-1 of the 4th relay of connect successively and the time delay relay KT2's that commutates often open delayed contact; Between the lower pile crown of the first normally opened contact KA1-1 of the first relay and zero line, be in series with successively the first normally opened contact KA3-1 of the 3rd relay, the 3rd normally opened contact SA1-3 of universal seclector and the coil of the 4th relay K A4; Between the upper pile crown of the lower pile crown of the first normally opened contact KA4-1 of the 4th relay and the 3rd normally opened contact SA1-3 of universal seclector, pass through wire cross-over connection.

Slide block is lower and pressurize circuit B slowly: comprise and be connected on successively speed change point travel switch SQ2, the 4th normally opened contact SA1-4 of universal seclector and the coil of pressurize time delay relay KT1 controlled between power firestreak and zero line; Also comprise the normally closed delayed contact, the second normally closed contact KA2-2 of the second relay and the coil KA3 of the 3rd relay that are connected on successively the second normally opened contact KA3-2, the pressure release time delay relay KT3 that control the 3rd relay between power firestreak and zero line; Between the upper pile crown of the normally closed delayed contact of the lower pile crown of speed change point travel switch SQ2 and pressure release time delay relay KT3, cross-over connection has the second normally opened contact KA1-2 of the first relay.Between speed change point travel switch SQ2 and zero line, be connected in series with successively the normally opened contact of pressure switch KP and the coil of auxiliary reclay KA, the two ends of the normally opened contact of pressure switch KP are connected in parallel to the first normally opened contact KA-1 of auxiliary reclay, and the second normally opened contact KA-2 of auxiliary reclay is connected between the 4th normally opened contact SA1-4 of universal seclector and the coil of pressurize time delay relay KT1.

In the time that universal seclector SA1 pushes " crawl " state, its second and third, four, five normally opened contact SA1-2, SA1-3, SA1-4, SA1-5 all disconnect, step on the first foot-switch SF1, the normally opened contact SF1-1 closure of the first foot-switch, the coil of the first relay K A1 obtains electric work, and slide block is descending at a slow speed; Unclamp the first foot-switch SF1, the normally opened contact SF1-1 of the first foot-switch disconnects, the coil losing electricity of the first relay K A1, and slide block stops descending.When upper die of bending machine starts to contact after plate, system pressure increases, in the time of pressure that pressure overpressure relay K P sets, and pressure switch KP sender.Under crawl state, KT1 is inoperative for pressurize time delay relay, and the length of dwell time is by foot-switch control.Unclamp the first foot-switch SF1, pressurize stops.Step on the second foot-operated switch S F2, the main coil of the second relay K A2 obtains electric, slide block backhaul; Unclamp the second foot-operated switch S F2, the main coil dead electricity of the second relay K A2, slide block stops backhaul.

In the time that universal seclector SA1 pushes " single " state, the second, four, five normally opened contact SA1-2, SA1-4, SA1-5 adhesive, the 3rd normally opened contact SA1-3 is still in off-state, step on the first foot-switch SF1, the normally opened contact SF1-1 closure of the first foot-switch, the main coil of the first relay K A1 obtains electric work.Now, the first relay K A1 first normally opened contact KA1-1 will obtain electric self-insurance, even if unclamp foot-switch SF1, the main coil of the first relay K A1 still electric, slide block will be descending fast.When slide block is after speed change point travel switch SQ2, the main coil of the 3rd relay K A3 obtains electric, and slide block is descending at a slow speed.When upper die of bending machine starts to contact after plate, system pressure increases, in the time of pressure that pressure overpressure relay K P sets, pressure switch KP sender, make the main coil of auxiliary reclay KA obtain electric, the first normally opened contact KA-1 of auxiliary reclay KA incites somebody to action to obtain electric self-insurance, and it is electric that the second normally opened contact KA-2 closure of auxiliary reclay KA obtains the main coil of pressurize time delay relay KT1, carries out pressurize time delay.When pressurize time delay relay KT1 arrived after the time setting, the normally opened contact adhesive of pressurize time delay relay KT1, normally closed contact disconnects, and makes the main coil dead electricity of the first relay K A1, pressure release time delay relay KT3 obtain electric, bender stops pressurize, starts to carry out pressure release.When pressure release time delay relay KT3 arrived after the time setting, the normally closed contact of pressure release time delay relay KT3 disconnects, and makes the main coil dead electricity of the 3rd relay K A3, and bender finishes pressure release.Now the main coil of the second relay K A2 obtain electric, start backhaul.When slide block backhaul is pushed down after upper dead center travel switch SQ1, the normally closed interlock of upper dead center travel switch SQ1 disconnects, and makes the main coil dead electricity of the second relay K A2, and slide block stops backhaul.

In the time that universal seclector SA1 pushes " continuously " state, its second and third, four, five normally opened contact SA1-2, SA1-3, SA1-4, all adhesives of SA1-5, step on the first foot-switch SF1, the normally opened contact SF1-1 closure of the first foot-switch, the main coil of the first relay K A1 obtains electric work.Now, the first relay K A1 first normally opened contact KA1-1 will obtain electric self-insurance, even if unclamp foot-switch SF1, the first relay K A1 main coil still electric, slide block will be descending fast.When slide block is after speed change point travel switch SQ2, the main coil of the 3rd relay K A3 obtains electric, and slide block is descending at a slow speed.Now, the first normally opened contact KA3-1 adhesive of the 3rd relay K A3, makes the main coil of the 4th relay K A4 obtain electric.The first normally open contact KA4-1 adhesive self-insurance of the 4th relay K A4.When upper die of bending machine starts to contact after plate, system pressure increases, in the time of pressure that pressure overpressure relay K P sets, pressure switch KP sender, the main coil of auxiliary reclay KA is obtained electric, the first normally opened contact KA-1 of auxiliary reclay KA will obtain electric self-insurance, the second normally opened contact KA-2 closure of auxiliary reclay KA, the main coil of pressurize time delay relay KT1 is obtained electric, carry out pressurize time delay.When after the time that the arrival of pressurize time delay relay KT1 sets, the normally opened contact closure of pressurize time delay relay KT1, normally closed contact disconnects, and makes the main coil dead electricity of the first relay K A1, pressure release time delay relay KT3 obtain electric, bender stops pressurize, starts to carry out pressure release.When after the time that the arrival of pressure release time delay relay KT3 sets, the normally closed contact of pressure release time delay relay KT3 disconnects, and makes the main coil dead electricity of the 3rd relay K A3, and bender finishes pressure release.Now the main coil of the second relay K A2 obtain electric, start backhaul.In the time that upper dead center travel switch SQ1 is pushed down in slide block backhaul, the normally closed interlock of upper dead center travel switch SQ1 disconnects, and makes the main coil dead electricity of the second relay K A2, and slide block stops backhaul.Now, the main coil of commutation time delay relay KT2 obtains electric, and when commutation time delay relay, KT2 reached after the time setting, the normally opened contact adhesive of commutation time delay relay KT2, the main coil that makes the first relay K A1 again electric, slide block is again descending fast.

The foregoing is only the better possible embodiments of the utility model, non-ly therefore limit to scope of patent protection of the present utility model.In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.The utility model can pass through or adopt existing techniques in realizing without the technical characterictic of describing, and does not repeat them here.

Claims

1. a control circuit for slider of bender, comprises that slide block descends circuit (A), slide block lower and pressurize circuit (B) and pressure release and backhaul circuit (C) slowly soon,

Described slide block descends circuit (A) soon: comprise being connected on successively and control the normally closed contact (SF2-1) of the second foot-switch between power firestreak and zero line, second normally opened contact (SA1-2) of universal seclector, first normally opened contact (KA1-1) of the first relay, normally closed delayed contact, first normally closed contact (KA2-1) of the second relay and the coil of the first relay (KA1) of pressurize time delay relay (KT1); Between the upper pile crown of the lower pile crown of the normally closed contact (SF2-1) of the second foot-switch and the normally closed delayed contact of pressurize time delay relay (KT1), cross-over connection has the normally opened contact (SF1-1) of the first foot-switch; Between the upper pile crown of the lower pile crown of the normally closed contact (SF2-1) of the second foot-switch and the normally closed delayed contact of pressurize time delay relay (KT1) also cross-over connection have first normally opened contact (KA4-1) of the 4th relay of connect successively and a time delay relay (KT2) that commutates often open delayed contact; Between the lower pile crown of first normally opened contact (KA1-1) of the first relay and zero line, be in series with successively first normally opened contact (KA3-1) of the 3rd relay, the 3rd normally opened contact (SA1-3) of universal seclector and the coil of the 4th relay (KA4); Between the upper pile crown of the lower pile crown of first normally opened contact (KA4-1) of the 4th relay and the 3rd normally opened contact (SA1-3) of universal seclector, pass through wire cross-over connection;

Described slide block is lower and pressurize circuit (B) slowly: comprise and be connected on successively speed change point travel switch (SQ2), the 4th normally opened contact (SA1-4) of universal seclector and the coil of pressurize time delay relay (KT1) controlled between power firestreak and zero line; Also comprise being connected on successively and control second normally opened contact (KA3-2) of the 3rd relay between power firestreak and zero line, normally closed delayed contact, second normally closed contact (KA2-2) of the second relay and the coil (KA3) of the 3rd relay of pressure release time delay relay (KT3); Between the upper pile crown of the normally closed delayed contact of the lower pile crown of speed change point travel switch (SQ2) and pressure release time delay relay (KT3), cross-over connection has second normally opened contact (KA1-2) of the first relay;

Pressure release and backhaul circuit (C): comprise being connected on successively and control the normally closed contact of the upper dead center travel switch (SQ1) between power firestreak and zero line, first normally closed contact (KA3-3) of the 3rd relay, the 5th normally opened contact (SA1-5) of universal seclector, normally closed contact (SF1-2), first normally closed contact (KA1-3) of the first relay and the coil of the second relay (KA2) of the first foot-switch; Between the upper pile crown of the normally closed contact (SF1-2) of the lower pile crown of the normally closed contact of upper dead center travel switch (SQ1) and the first foot-switch, cross-over connection has the normally opened contact (SF2-2) of the second foot-switch; Control the coil of often opening delayed contact and pressure release time delay relay (KT3) that is also connected in series with pressurize time delay relay (KT1) between power firestreak and zero line; Control the second normally closed contact (KA1-4) that is also connected in series with successively the first relay between power firestreak and zero line, the 3rd normally closed contact (KA2-3) of the second relay, the second normally closed contact (KA3-4), second normally opened contact (KA4-2) of the 4th relay and the coil of commutation time delay relay (KT2) of the 3rd relay;

It is characterized in that, between speed change point travel switch (SQ2) and zero line, be connected in series with successively the normally opened contact of pressure switch (KP) and the coil of auxiliary reclay (KA), the two ends of the normally opened contact of pressure switch (KP) are connected in parallel to first normally opened contact (KA-1) of auxiliary reclay, and second normally opened contact (KA-2) of auxiliary reclay is connected between the 4th normally opened contact (SA1-4) and the coil of pressurize time delay relay (KT1) of universal seclector.