CN2537509Y - Laser marking machine with anti-explosion protective function - Google Patents

Abstract

The utility model relates to a laser marking machine with an anti-explosion protective function, which comprises a laser, a scan vibrating lens device which transfers laser beams to workpieces, a cooling device, a feeding device, a smoke and dust removing device and a computer. The utility model is characterized in that the utility model is provided with an anti-explosion protective device, and the device is provided with a protective circuit for overlong marking time, oversize marking power and stop of the computer, a protective circuit for a scan vibrating lens false action, an R-S trigger U1 which receives the output signals of the two circuits, an NOR gate U2A which does NOR calculation to the output signals of the R-S trigger U1, a protective action and alarm driver U3 and a relay RL1 which shuts down the power supply of the laser.

Description

Laser marking machine with explosive-proof protector function

Technical field

The utility model relates to a kind of laser marking machine with explosive-proof protector function, is used for the right product explosive or that easily leak nuisance of commute and carries out mark, is particularly useful for the coded markings of civilian detonator.

Background technology

Product is carried out laser labelling compare, because its stable performance, signature velocity is fast, precision is high, mark quality is good and series of advantages such as reliable anti-fake effect, has been widely used in the mark of industrial products with traditional labeling method.Because the particularity of the quick-fried industry detonator of people laser code, when its critical component computer, laser instrument, scanning galvanometer break down, for example, overlong time, the laser power of laser action on same detonator is excessive, computer corruption, scanning galvanometer misoperation etc. all may cause blasting cap detonation.Existing laser marking machine then is difficult to satisfy it to requirement of explosion.

The utility model content

Technical problem to be solved in the utility model is: a kind of laser marking machine with explosive-proof protector function is provided; its flame proection by designing voluntarily; can be excessive in overlong time, the laser power of laser action on same detonator, when computer corruption or scanning galvanometer misoperation, close the power supply of laser instrument immediately.The technical scheme that solves this technical problem is: a kind of laser marking machine with explosive-proof protector function; comprise: laser instrument; transmit the scanning galvanometer device of laser beam to workpiece; cooling device; pay-off; smoke abatement device and computer; it is characterized in that: be provided with flame proection, this device has the mark overlong time; excessive and the computer corruption holding circuit of mark power; scanning galvanometer misoperation holding circuit; accept the R-S trigger U1 of aforementioned two circuit output signals; R-S trigger U1 output signal is made the nor gate U2A of NOR-operation; protection action and warning driver U3 and the relay R L1 that closes laser power supply.And mark overlong time and peak power holding circuit contain: the operational amplifier U4A～U4D that does isolation or relatively amplify, U5A, the monostable flipflop U6A, the NAND gate U8A that make timer, U8B, nor gate U7A～U7C and potentiometer VR3; Scanning galvanometer misoperation holding circuit contains: respectively to operational amplifier U9A～U9D that the galvanometer control signal and the galvanometer actual position signal of X, Y-axis are isolated, subtraction amplifies and positive negative sense compares, U10A～U10D, U11A, U11B.In the technical program; flame proection is with the duty of real time monitoring laser marking system and computer; and will set value with monitoring value and compare; in case the laser that acts on the same detonator surpasses setting power, scanning galvanometer misoperation, computer corruption above setting-up time or laser power; flame proection cuts off laser output immediately; start sound and light alarm simultaneously, and inform that guard of computer moves (if protection action is not that computer corruption causes).The adjustable range of cutting off laser is: when the Laser Time on acting on same detonator is 2mS～7S; Perhaps, the moving rate of the setting of protection action be the laser instrument peak power 0%～100% in; Perhaps, high-speed vibrating mirror occurs within the misoperation 2mS; Perhaps, between computer corruption setting-up time 2mS～7S.

Description of drawings

Fig. 1 is that the circuit theory of flame proection is always schemed.

Fig. 2 is concrete time, power and the computer corruption holding circuit schematic diagram of block diagram A among Fig. 1.

Fig. 3 is the concrete scanning galvanometer misoperation holding circuit schematic diagram of block diagram B among Fig. 1.

Fig. 4 is the schematic diagram that is electrically connected of flame proection.

The specific embodiment

With reference to Fig. 1～Fig. 4; laser marking machine with explosive-proof protector function described in the utility model; comprise: laser instrument; transmit the scanning galvanometer device of laser beam to workpiece; cooling device; pay-off; smoke abatement device and computer; it is characterized in that: be provided with flame proection, this device has the mark overlong time; excessive and the computer corruption holding circuit of mark power; scanning galvanometer misoperation holding circuit; accept the R-S trigger U1 of aforementioned two circuit output signals; R-S trigger U1 output signal is made the nor gate U2A of NOR-operation; protection action and warning driver U3 and the relay R L1 that closes laser power supply.Further technical scheme can be: mark overlong time and peak power holding circuit contain: the operational amplifier U4A～U4D that does isolation or relatively amplify, U5A, the monostable flipflop U6A, the NAND gate U8A that make timer, U8B, nor gate U7A～U7C and potentiometer VR3; Scanning galvanometer misoperation holding circuit contains: respectively to operational amplifier U9A～U9D that the galvanometer control signal and the galvanometer actual position signal of X, Y-axis are isolated, subtraction amplifies and positive negative sense compares, U10A～U10D, U11A, U11B.In the electrical connection that circuit theory reflected of Fig. 1～Fig. 4, resistance, capacitive components and parts are not all to be used for specific embodiment, and are meanwhile too not tediously long for making description, promptly do not give unnecessary details one by one for conspicuous equivalent circuit.Each is schemed related components and parts title and numbers as following table:

The components and parts title	Numbering	The components and parts title	Numbering	The components and parts title	Numbering
						R-S trigger CD4043	U1	Four input nor gate CD4002	U2A	Darlington array UL2804	U3
Relay	RL1	Resistance	R1～R40	Electric capacity	C1～C7
						Connector	J1～J5	Operational amplifier LM2902	U4A～U4D	Operational amplifier LM2902	U5A
Monostable flipflop CD4098	U6A	NAND gate CD4011	U8A、U8B	Nor gate CD4001	U7A～U7C
						Operational amplifier LM348	U9A～U9D	Operational amplifier LM348	U10A～U10D	Operational amplifier LM348	U11A、U11B
Diode	D1～D4	Light-Emitting Diode	LED1～LED4	Potentiometer	VR1～VR8

English and implication such as following table that each figure is marked:

English	Implication	English	Implication	English	Implication
						Time ADJ	Time is regulated	Power ADJ	Power adjusting	X RETURN	Galvanometer X-axis inverse signal
Y RETURN	Galvanometer Y-axis inverse signal

Circuit theory shown in Figure 2 can realize acting on that Laser Time on the same detonator is long, laser power is excessive, the differentiation of computer corruption.During work (in order more to meet the custom of this area, when directly mentioning certain components and parts numbering, following description is equal to this components and parts), the DFPS signal (the first pulse after the driving suppresses signal) that J2-1 (the 1st contact of connector 2, back are together) inserts is the single detonator marking signal of mark computer-chronograph output; The DPULSE signal (pulse signal after the driving) that J2-2 inserts is the control signal of computer to laser output power.The DFPS signal of Transistor-Transistor Logic level, relatively (the benchmark comparative voltage becomes the CMOS level after being adjusted into 2.4～3.6V) amplifications by VR2 through U4A isolation, U4D.Becoming DFPS signal behind the CMOS level directly starts timer U6A on the one hand (the timing constant is regulated by the VR1 in 7 among Fig. 4, adjustable range is that 2mS～7S) makes U6A-Q output high level, carry out NOR-operation through U7B together with U6A-Q (the Q lead-in wire of U6A, the back together) after delaying time by R28 and C6 on the other hand.Die from the DFPS low level if act on the long or computer of the Laser Time of same detonator, then U7B-5, U7B-6 are low level, and U7B-4 exports high level.

When computer is died from the DFPS low level,, can comprehend if there is not laser output this moment; If laser instrument also has faint output (concrete output definition is regulated the back decision by VR3), U8B-4 exports high level.As long as above situation has a speciogenesis, the OUT1 output high level among the figure.In four output OUT1～OUT4, as long as one of them is a high level, promptly commands relays RL1 closes lasing light emitter.

The laser power signal DPULSE of Transistor-Transistor Logic level isolates through U4B, is divided into two-way after R26, R27, C7, the C8 filtering: the one tunnel through U4C relatively (the benchmark comparative voltage be adjusted into by VR3 0.1～0.2V) amplify after as judging whether computer crashes in the low level power reference signal of DFPS; Another route U4C determines whether power is excessive after relatively amplifying (the max power constraint definition is regulated by 7 interior VR4 among Fig. 4, and adjustable range is 0%～100% laser instrument rated power).If power is excessive, the OUT2 output high level among the figure.

Fig. 3 realizes the differentiation of scanning galvanometer misoperation.The X-axis scanning galvanometer actual position signal that X-axis scanning galvanometer position control signal (by computer control) that J4-1 inserts and J4-2 insert (the PID adjusting part by galvanometer obtains), through U9A, U9B isolate, the U9C subtraction amplifies, the U9D forward relatively (comparator reference voltage by VR5 be adjusted to+1V), the U11A negative sense relatively (comparator reference voltage by VR6 be adjusted to-1V) after the computing, if the X-axis scanning galvanometer produces misoperation OUT3 output high level; In like manner, if the Y-axis scanning galvanometer produces misoperation OUT4 output high level.

Protection is reported to the police and is locked and drive function by the realization of accompanying drawing 1 circuit, and A is Fig. 2 among this figure, and B is Fig. 3; U1 is R-S trigger CD4043, and U2A is four input nor gate CD4002, and U3 is protection action and warning driver (darlington array UL2804), and RL1 is protection action host node output relay.OUT1, the OUT2 of output and B differentiated in four signals of OUT3, OUT4 of back output after A differentiated among the figure, as long as there is a signal high level to occur, U1 just is locked, and drives the back through U2 NOR-operation, U3 warning and goes to cut off laser instrument output by RL1 output, starts sound and light alarm simultaneously.Concrete input and output annexation is seen Fig. 4.Among Fig. 41 ' connect ± the 15V dc source; 2 ' for protecting main contact output; 3 ' connect the computer control output signal; 4 ' connect scanning galvanometer driver galvanometer position signalling; 5 ' be the alarm lamp after the protection; 6 ' for removing alarm lock set button S1; 7 ' regulate for protecting parameter.

Claims (2)

1. laser marking machine with explosive-proof protector function; comprise: laser instrument; transmit the scanning galvanometer device of laser beam to workpiece; cooling device; pay-off; smoke abatement device and computer; it is characterized in that: be provided with flame proection, this device has the mark overlong time; excessive and the computer corruption holding circuit of mark power; scanning galvanometer misoperation holding circuit; accept the R-S trigger U1 of aforementioned two circuit output signals; R-S trigger U1 output signal is made the nor gate U2A of NOR-operation; protection action and warning driver U3 and the relay R L1 that closes laser power supply.

2. laser marking machine according to claim 1, it is characterized in that: mark overlong time and peak power holding circuit contain: the operational amplifier U4A～U4D that does isolation or relatively amplify, U5A, the monostable flipflop U6A, the NAND gate U8A that make timer, U8B, nor gate U7A～U7C and potentiometer VR3; Scanning galvanometer misoperation holding circuit contains: respectively to operational amplifier U9A～U9D that the galvanometer control signal and the galvanometer actual position signal of X, Y-axis are isolated, subtraction amplifies and positive negative sense compares, U10A～U10D, U11A, U11B.

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