CN200960737Y - Control system for pressing machine fast mold exchange device - Google Patents

Abstract

The utility model discloses a quick die change device control system of presser in presser technology field, comprising an execution circuit, a control circuit and a safety return circuit, wherein the control circuit controls the actions of die upper Yangtze, upper clamping die and lower clamping die, a relay, which controls the actions of die upper Yangtze, upper clamping die and lower clamping die in control circuit, and a micro-switch, the position of which corresponds to the up-down dead-centre position of a slide block of the presser, realize the interlocking action by an interlocking switch. Using the utility model, the operation crews can accurately judge the time of die change, reduce the time of die change, and guarantee the die, device and laborers safe, thereby avoiding the potential safety hazard caused by failure of action and operation, and the presser is safer and more reliable.

Description

A kind of forcing press quick die change device control system

Technical field

The utility model relates to a kind of forcing press, particularly the control circuit of the mould changing device of forcing press.

Background technology

In the prior art, the quick die change device that a kind of forcing press is arranged, its patrix that is arranged on the slide block lower end needs to fix by the die clamper of solenoid control in installation process, the counterdie that is arranged on the workbench also needs another die clamper of solenoid control to fix, in addition, the die lifter that mould is raised up also is achieved through the piston lifting of the corresponding oil cylinder of solenoid control, its control system comprises executive circuit, control circuit and safety return circuit, executive circuit is achieved by non-interfering change-over switch control corresponding solenoid valve, control circuit is controlled safety return circuit by the pressure signal that a plurality of points detect, and makes the safety return circuit permission or forbids forcing press work; At present upper clamp formwork, mould raises up and three processes of lower clamp formwork are separate each other, each freedom is controlled different magnetic valves by corresponding rotary switch, realizes the oil-feed or the shutoff of each die clamper oil cylinder or die lifter oil cylinder; Because not interlock or interlocking in the control system; because of causing mould, lathe, stroke defect or operate miss damage or the personal safety accident easily; main forms has: when (1) patrix or counterdie do not clamp; the work of forcing press stamping-out; like this under the effect of very big blanking pressure; patrix or counterdie are offset, very easily mold damage.(2) forcing press at an arbitrary position, die lifter action, in the time of near slide block is in bottom dead centre, die lifter raises up, and counterdie is lifted, and the upper and lower mould top is closed, thereby mold damage.(3) under the state that counterdie clamps, die lifter raises up, and counterdie is lifted, and the die lifter direction of action is opposite with lower clamp formwork device clamping direction, very easily damages die clamper.(4) the upper clamp formwork device all can loosen at an arbitrary position, will directly cause patrix to come off like this, injures counterdie by a crashing object or causes the personal safety accident.

The utility model content

The purpose of this utility model provides a kind of forcing press quick die change device control system, can avoid botching routines or potential safety hazard that operate miss brings, makes forcing press work more safe and reliable.

For achieving the above object, the utility model provides: a kind of forcing press quick die change device control system, comprise executive circuit, control circuit and safety return circuit, described executive circuit by be connected in parallel the working power two ends by the normally opened contact of first relay K A15 control mould raise up the mould of magnetic valve YV7 break-make raise up circuit, form by the lower clamp formwork operating circuit of the normally opened contact control lower clamp formwork magnetic valve YV9 break-make of the second relay K A16 with by the normally opened contact control upper clamp formwork magnetic valve YV8 of the 3rd relay K A17, the upper clamp formwork operating circuit of YV10 break-make; Described control circuit comprises first group of contact, hand switch SA11, the first microswitch SQ7 and the first relay K A15 of the first linked switch SA7 that is connected the control both ends of power after the series connection; Be connected the second group of contact and the second relay K A16 of the first linked switch SA7 of control both ends of power after the series connection, the first microswitch SQ7 connects when press ram is in upper dead center position; Be connected first group of contact and the 3rd relay K A17 of the second microswitch SQ8, the second linked switch SA12 of control both ends of power after the series connection, the second microswitch SQ8 connects when press ram is in lower dead point position; Second group of contact of the normally-closed contact of the second relay K A16, the second linked switch SA12, lift molding pressure relay SP1, lower clamp formwork pressure switch SP2, upper clamp formwork pressure switch SP3, SP4 and be connected the control both ends of power after the forcing press safety return circuit links to each other in proper order.

The utility model tool is in the following manner: (1) must be when upper die and lower die be all clamped, can the operating pressure machine, and the stamping-out workpiece.The second relay K A16 connects, and lower clamp formwork magnetic valve YV9 connects, and expression lower clamp formwork device is in relaxation state, and when the second relay K A16 disconnected, the lower clamp formwork device was in clamped condition; Same the 3rd relay K A17 connects the expression upper clamp formwork and is in relaxation state, when first group of contact of the second linked switch SA12 disconnects simultaneously second group of contacting, the 3rd relay K A17 disconnects, upper clamp formwork magnetic valve YV8, YV10 access failure, and upper clamp formwork is in clamped condition; Correspondingly the contact of each pressure switch is in on-state under the relevant pressure effect, and safety return circuit gets electric, the work of authorized pressure machine stamping-out; Second group of contact of the normally-closed contact of the second relay K A16 that is connected in series with safety return circuit, the second linked switch SA12, lift the arbitrary place access failure among molding pressure relay SP1, lower clamp formwork pressure switch SP2, upper clamp formwork pressure switch SP3, the SP4, then safety return circuit not the authorized pressure machine carry out stamping-out work.(2) for to guarantee the safe in utilization of mould, die lifter only could be connected when forcing press is stopped at upper dead center position.SQ7 can connect at upper dead center position, the hand switch SA11 that closes this moment, and two groups of contacts of the first linked switch SA7 are connected simultaneously, lower clamp formwork magnetic valve YV9 gets electric, loosens lower clamp formwork, and the first relay K A15 gets simultaneously, act mould magnetic valve YV7 gets electric, and counterdie raises up.(3) die lifter and lower clamp formwork interlock action guarantees that die lifter can not raise up mould under the counterdie clamped condition.The first relay K A15 connects, and lift mould magnetic valve YV7 and connect, the action of expression die lifter, the second relay K A16 connects and guarantees that lower clamp formwork is in relaxation state.(4) for guaranteeing personal device security, prevent that putting patrix comes off, upper clamp formwork must just can loosen near bottom dead centre.Have only when the second microswitch SQ8 connects, the 3rd relay K A17 just can connect, and upper clamp formwork magnetic valve YV8, YV10 connect, and this moment, upper clamp formwork loosened, and patrix is slowly fallen.From the above-mentioned course of work as can be seen, the utility model can make operating personnel accurately judge die change opportunity, reduce mould replacing time, can guarantee the safe in utilization and labourer's of mould, equipment life safety, can avoid botching routines or potential safety hazard that operate miss brings, make forcing press work more safe and reliable.

For whether indication upper clamp formwork device and lower clamp formwork device are in relaxation state, the normally-closed contact of the 3rd relay K A17 be connected the control both ends of power after the upper clamp formwork indicator lamp is connected; An electrode points of the normally-closed contact of the second relay K A16 is connected with the lower clamp formwork indicator lamp with a corresponding end of control power supply.When second linked switch SA12 connection, and the upper clamp formwork indicator lamp is still bright, then represents slide block not at lower dead point position, and upper clamp formwork magnetic valve YV8, YV9 can not work, and patrix is in clamped condition, and the upper clamp formwork device promptly can not get loose; The bright expression lower clamp formwork of lower clamp formwork indicator lamp magnetic valve YV9 not electric, the lower clamp formwork device is in clamped condition.

Description of drawings

Fig. 1 is the utility model structural representation;

The specific embodiment

As figure, be forcing press quick die change device control system, form by executive circuit C, control circuit A and safety return circuit B;

The formation of executive circuit C: mould raises up and is connected the mould of forming at the working power two ends circuit that raises up after the normally opened contact series connection of magnetic valve YV7, the first relay K A15, and the mould magnetic valve YV7 that raises up gets when electric, and counterdie raises up; The normally opened contact that is connected lower clamp formwork magnetic valve YV9, the second relay K A16 at working power two ends after the series connection is formed the lower clamp formwork operating circuit, lower clamp formwork magnetic valve YV9 gets when electric, forcing press lower clamp formwork device loosens, lower clamp formwork magnetic valve YV9 not when electric, the lower clamp formwork device clamps counterdie; Two upper clamp formwork magnetic valve YV8, YV10 in parallel, connect again and be connected the upper clamp formwork operating circuit that the working power two ends are formed behind the normally opened contact of the 3rd relay K A17, upper clamp formwork magnetic valve YV8, YV10 get when electric, forcing press upper clamp formwork device loosens, upper clamp formwork magnetic valve YV8, YV10 not when electric, the upper clamp formwork device clamps;

The formation of control circuit A: the first group of contact, hand switch SA11, the first microswitch SQ7 and the first relay K A15 that are connected the first linked switch SA7 of control both ends of power after the series connection; Be connected the second group of contact and the second relay K A16 of the first linked switch SA7 of control both ends of power after the series connection, the first microswitch SQ7 connects when press ram is in upper dead center position, this first microswitch SQ7 is installed in the cam controller, by regulating, only being in upper dead center position at slide block can connect; Be connected first group of contact and the 3rd relay K A17 of the second microswitch SQ8, the second linked switch SA12 of control both ends of power after the series connection, the second microswitch SQ8 connects when press ram is in lower dead point position, this second microswitch SQ8 is installed in the cam controller, by regulating, only being in lower dead point position at slide block can connect;

Second group of contact of the normally-closed contact of the second relay K A16, the second linked switch SA12, lift molding pressure relay SP1, lower clamp formwork pressure switch SP2, upper clamp formwork pressure switch SP3, SP4 and be connected the control both ends of power after forcing press safety return circuit B links to each other in proper order.Safety return circuit B is identical with safety return circuit of the prior art, and it gets when electric, but driving pressure machine stamping-out during dead electricity, is forbidden the action of forcing press stamping-out; Mould raise up magnetic valve YV7 not when electric, lift molding pressure relay SP1 connections, lower clamp formwork magnetic valve YV9, upper clamp formwork magnetic valve YV8, YV10 not when electric, corresponding lower clamp formwork pressure switch SP2, upper clamp formwork pressure switch SP3, SP4 connection.

The normally-closed contact of the 3rd relay K A17 be connected the control both ends of power after upper clamp formwork indicator lamp HL13 connects; An electrode points of the normally-closed contact of the second relay K A16 is connected with lower clamp formwork indicator lamp HL12 with a corresponding end of control power supply.

The control power supply adopts the 24V dc source, and working power adopts the 110V AC power.

When carrying out stamping-out work, two groups of contacts of the first linked switch SA7 are disconnected simultaneously, second group of closing of contact of the second linked switch SA12, corresponding pressure switch SP1, SP2, SP3, SP4 all connect, the action of safety return circuit B authorized pressure machine stamping-out; When needs raise up bed die, must make press ram be in upper dead center position, promptly the first microswitch SQ7 connects, and two groups of contacts of SA7 are connected simultaneously, and the second relay K A16 gets, lower clamp formwork magnetic valve YV9 gets, unclamp counterdie, simultaneously the first relay K A15 gets electricly, and the mould magnetic valve YV7 that raises up is got, lift counterdie, so that carry out die change; When needs are changed patrix, the second microswitch SQ8 must connect, be that slide block need be in lower dead point position, patrix can not fall from eminence in the replacing process and be smashed or hurt sb.'s feelings like this, first group of contacting of the second linked switch SA12 connected the 3rd relay K A17, and upper clamp formwork magnetic valve YV8, YV10 connect, unclamp patrix, patrix and the upper bolster that is arranged on the slide block lower end are separated.Arbitrary place access failure among second group of contact of the normally-closed contact of the second relay K A16 that is connected in series with safety return circuit, the second linked switch SA12, act molding pressure relay SP1, lower clamp formwork pressure switch SP2, upper clamp formwork pressure switch SP3, the SP4, then safety return circuit not the authorized pressure machine carry out stamping-out work, can guarantee safety.

Claims (2)

1, a kind of forcing press quick die change device control system comprises executive circuit, control circuit and safety return circuit, it is characterized in that:

Described executive circuit by be connected in parallel the working power two ends by the normally opened contact of first relay (KA15) control mould raise up the mould of magnetic valve (YV7) break-make raise up circuit, form by the lower clamp formwork operating circuit of normally opened contact control lower clamp formwork magnetic valve (YV9) break-make of second relay (KA16) with by the upper clamp formwork operating circuit of normally opened contact control upper clamp formwork magnetic valve (YV8, the YV10) break-make of the 3rd relay (KA17);

Described control circuit comprises first group of contact, hand switch (SA11), first microswitch (SQ7) and first relay (KA15) of first linked switch (SA7) that is connected the control both ends of power after the series connection; Be connected the second group of contact and second relay (KA16) of first linked switch (SA7) of control both ends of power after the series connection, first microswitch (SQ7) is connected when press ram is in upper dead center position; Be connected the first group of contact and the 3rd relay (KA17) of second microswitch (SQ8), second linked switch (SA12) of control both ends of power after the series connection, second microswitch (SQ8) is connected when press ram is in lower dead point position; Second group of contact of the normally-closed contact of the second relay K A16, second linked switch (SA12), lift molding pressure relay (SP1), lower clamp formwork pressure switch (SP2), upper clamp formwork pressure switch (SP3, SP4) and be connected the control both ends of power after the forcing press safety return circuit links to each other in proper order.

2, a kind of forcing press quick die change device control system according to claim 1 is characterized in that: the normally-closed contact of the 3rd relay (KA17) be connected the control both ends of power after upper clamp formwork indicator lamp (HL13) is connected; An electrode points of the normally-closed contact of second relay (KA16) is connected with lower clamp formwork indicator lamp (HL12) with a corresponding end of control power supply.

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