CN107471430B - Automatic sand feeding device and method for diamond wire saw production - Google Patents
Automatic sand feeding device and method for diamond wire saw production Download PDFInfo
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- CN107471430B CN107471430B CN201710792705.5A CN201710792705A CN107471430B CN 107471430 B CN107471430 B CN 107471430B CN 201710792705 A CN201710792705 A CN 201710792705A CN 107471430 B CN107471430 B CN 107471430B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 19
- 239000010432 diamond Substances 0.000 title claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 60
- 238000003860 storage Methods 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 25
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- 239000007787 solid Substances 0.000 claims description 46
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- 230000008569 process Effects 0.000 claims description 10
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C3/00—Apparatus or methods for mixing clay with other substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/16—Discharge means, e.g. with intermediate storage of fresh concrete
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/04—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by tools other than rotary type, e.g. reciprocating tools
- B28D5/042—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by tools other than rotary type, e.g. reciprocating tools by cutting with blades or wires mounted in a reciprocating frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/04—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by tools other than rotary type, e.g. reciprocating tools
- B28D5/045—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor by tools other than rotary type, e.g. reciprocating tools by cutting with wires or closed-loop blades
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
An automatic sand feeding device and method for diamond wire saw production, wherein the device comprises a control module, a storage tank and a quantitative tank positioned below the storage tank; a stirring impeller is arranged at the lower part in the storage tank, a stirring shaft which is vertically arranged is connected to the stirring impeller, and a stirring motor is connected to the stirring shaft in a transmission way; a transition hose is connected between the storage tank and the quantitative tank, a discharging hose is connected to a discharging port of the quantitative tank, and a first discharging valve and a second discharging valve are respectively arranged on the transition hose and the discharging hose; the control module comprises a processing unit and a liquid level acquisition circuit positioned in the quantitative tank, the liquid level acquisition circuit transmits acquired liquid level information to the processing unit, and the processing unit outputs a signal to control the first blanking valve to work. The method and the device basically do not need maintenance operation in the production process, have low cost, greatly reduce the failure rate and are convenient to popularize.
Description
Technical Field
The invention belongs to the field of diamond wire saw production, and particularly relates to an automatic sand feeding device for diamond wire saw production.
Background
The diamond wire saw is a product for electroplating diamond micro powder particles on the surface of a steel wire, and is mainly used for the related industries of cutting processing of raw materials for producing solar cell panels, precise ceramic cutting processing and sapphire cutting processing. In the process of manufacturing the diamond wire saw, the feeding of the diamond micro powder is completed by manual timing, and no successful example of the work completed by a mechanical device is found. As the size of the diamond micro powder particles is nano-scale, if common equipment is adopted for adding, the nano-sized particles can easily drill into gaps of a transmission bearing and an electromagnetic valve, and the phenomenon of dead locking of mechanical parts can be easily caused. The production environment is high in temperature and humidity, the nanoparticles are easy to agglomerate, the descending of the micro powder particles is hindered, the micro powder particles cannot be used, and the like, so that the working requirement of automatic sand adding is difficult to realize by adopting a common mechanical method. In actual operation, the manual sand adding (adding of micro powder particles) has great disadvantages: the first sand adding time interval is long, sand is added once every two hours, the online detector can find that the density of the carborundum particles on the steel wire is very high after sand adding, the density of the particles is reduced along with the time, the sand adding is carried out for the second time, the micro powder particles on the whole steel wire are distributed in a step shape from the aspect of density, and therefore the change of the wire diameter is influenced (the more the carborundum particles are, the larger the wire diameter is relatively), the quality of a product is seriously influenced by the sand adding mode (the uniformity of the carborundum particle distribution on the wire saw can influence the smoothness and sharpness of a slice, the change of the wire diameter can influence the thickness uniformity of the slice, and the risk of increasing broken wires in the cutting process can be increased).
Disclosure of Invention
The invention aims to provide an automatic sand feeding device and method for diamond wire saw production, which have simple structure and good use effect.
In order to solve the technical problems, the invention provides the following technical scheme: an automatic sand feeding device for diamond wire saw production comprises a control module, a storage tank and a quantitative tank positioned below the storage tank; a stirring impeller is arranged at the lower part in the storage tank, a stirring shaft which is vertically arranged is connected to the stirring impeller, and a stirring motor is connected to the stirring shaft in a transmission way; a transition hose is connected between the storage tank and the quantitative tank, a discharging hose is connected to a discharging port of the quantitative tank, and a first discharging valve and a second discharging valve are respectively arranged on the transition hose and the discharging hose; the control module comprises a processing unit and a liquid level acquisition circuit positioned in the quantitative tank, the liquid level acquisition circuit transmits acquired liquid level information to the processing unit, and the processing unit outputs a signal to control the first blanking valve to work.
The first blanking valve and the second blanking valve are divided into a first pinch valve and a second pinch valve.
The control module further comprises a stirring motor control circuit, a stirring motor overheat protection circuit and a pinch valve control circuit, wherein the stirring motor overheat protection circuit is connected with the signal input end of the processing unit, and the signal output end of the processing unit is respectively connected with the stirring motor control circuit and the pinch valve control circuit;
the stirring motor control circuit comprises a first inverter, a second inverter, a first alternating-current solid-state relay and a second alternating-current solid-state relay, wherein the signal output end of the processing unit is connected with the input end of the first inverter and the input end of the second inverter respectively, the output end of the first inverter and the output end of the second inverter are connected with the positive input end of the first alternating-current solid-state relay and the positive input end of the second alternating-current solid-state relay respectively, and the negative input end of the first alternating-current solid-state relay and the negative input end of the second alternating-current solid-state relay are grounded; the output ends of the first alternating current solid state relay and the second alternating current solid state relay are connected with windings of the stirring motor.
The stirring motor overheat protection circuit comprises a temperature control switch arranged on the stirring motor shell, and a signal output end of the temperature control switch is connected with a signal input end of the processing unit;
the pinch valve control circuit comprises a third inverter, a fourth inverter and a third alternating current solid-state relay, wherein the signal output end of the processing unit is connected with the input end of the third inverter and the input end of the fourth inverter respectively, the output end of the third inverter and the output end of the fourth inverter are connected with the positive input end of the third alternating current solid-state relay and the positive input end of the fourth alternating current solid-state relay respectively, and the negative input end of the third alternating current solid-state relay and the negative input end of the fourth alternating current solid-state relay are grounded; the output ends of the third alternating current solid state relay and the fourth alternating current solid state relay are respectively connected with the first pinch valve and the second pinch valve; the output ends of the third alternating current solid state relay and the fourth alternating current solid state relay are respectively connected with a pinch valve state indicating circuit, the two pinch valve state indicating circuits comprise light emitting diodes and resistors, and the anodes of the two light emitting diodes are respectively connected with the output ends of the third alternating current solid state relay and the fourth alternating current solid state relay; the cathodes of the two light emitting diodes are respectively connected with a direct current power supply through two resistors.
The control module also comprises a communication circuit and an alarm circuit, wherein the communication circuit and the alarm circuit are respectively connected with the signal output end of the processing unit; the communication circuit comprises a communication chip which is connected with the signal output end of the processing unit; the alarm circuit comprises a first triode, a second triode, an alarm circuit and a buzzer, wherein the signal output end of the processing unit is connected with the base electrode of the first triode, the collector electrode of the first triode is connected with a power supply, the emitter electrode of the first triode is connected with the base electrode of the second triode through an alarm resistor, the emitter electrode of the second triode is grounded, and the collector electrode of the second triode is connected with the buzzer.
The control module also comprises a display circuit, the display circuit comprises a liquid crystal screen and a discharge resistor, and the signal output end of the processing unit is connected with the signal input ends of the discharge resistor and the liquid crystal screen.
The control module also comprises a storage circuit, and the signal output end of the processing unit is connected with the storage circuit.
The liquid level acquisition circuit further comprises a liquid level resistor, an adjustable resistor, a comparator and two probes, wherein the two probes extend into the quantitative groove, one probe is grounded, the other probe is connected with the non-inverting input end of the comparator, the inverting input end of the comparator is connected with the adjustable end of the adjustable resistor, the first end of the adjustable resistor is connected with a power supply, and the second end of the adjustable resistor is grounded; the signal output end of the comparator is connected with the signal input end of the processing unit.
A hard pipeline is connected between the transition hose and the storage tank, and the hard pipeline is connected with the storage tank in a sealing way; the top end of the hard pipeline is positioned in the storage tank, the top end of the hard pipeline is closed, and at least 1 plating solution filtering hole is distributed on the top end of the hard pipeline.
The device also comprises a hopper, wherein the lower part of the hopper stretches into the storage tank.
The storage tank is made of transparent materials; scales are arranged on the side wall of the storage tank.
The invention also discloses an automatic sand adding method for diamond wire saw production by using the device, which comprises the following steps: (1) Adding sand and electroplating solution into a storage tank through a hopper;
(2) The stirring motor adopts forward rotation for a period of time, stops for a period of time, and then reversely rotates for a period of time to stir the materials in the storage tank;
(3) In the blanking process, the first pinch valve is opened, the material in the storage tank falls into the quantifying tank through the transition hose until the material contacts with the probe in the quantifying tank, the first pinch valve is closed, the second pinch valve is opened, and the material in the quantifying tank enters into equipment needing sand adding through the blanking hose
Through the technical scheme, the invention has the beneficial effects that: (1) The sand can be accurately and quantitatively added at short time intervals, so that the distribution density of particles on the steel wire is uniform, and the product quality can be improved to a great extent. (2) When the equipment works, one class only needs to add sand consumption of one class into the sand adding machine, the middle part does not need to be added any more, the labor intensity of manpower can be reduced, and meanwhile, the adverse effect of most human factors on the production process is avoided. (3) The device has a perfect protection mechanism, and the items which can play a role in protection are as follows: the power failure protection, the abnormal protection of the stirring motor, the abnormal protection of the discharging part, and the like, and ensure the safe and reliable production. (4) The device has simple mechanical structure, basically does not need maintenance operation in the production process, has low cost, greatly reduces the failure rate and is convenient for popularization and application.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic block diagram of the present invention;
FIG. 3 is a schematic circuit diagram of the present invention;
FIG. 4 is a pinch valve control circuit;
FIG. 5 is a communication circuit;
FIG. 6 is a liquid level detection circuit;
FIG. 7 is an alarm circuit;
FIG. 8 is a motor control circuit;
FIG. 9 is a power supply circuit;
fig. 10 is a display circuit.
Detailed Description
The utility model provides an automatic sand feeding device for diamond wire saw production, as shown in fig. 1~10, includes control module, stock chest 3 and is located the ration groove 9 of stock chest 3 below.
The storage tank 3 is made of transparent materials; the side wall of the storage tank 3 is provided with scales 6 so that the liquid level in the storage tank 3 can be easily observed. The storage tank 3 is connected with the hopper 1, and the caliber of the hopper 1 gradually decreases from top to bottom, so that materials can easily enter the storage tank 3, and in addition, the lower part of the hopper 1 stretches into the storage tank 3 to prevent the occurrence of base liquid phenomenon.
The lower part is equipped with stirring impeller 5 in stock chest 3, is connected with the (mixing) shaft 4 of vertical setting on the stirring impeller 5, and the transmission is connected with (mixing) motor 2 on the (mixing) shaft 4, drives (mixing) shaft 4 and stirring impeller 5 and rotates in stock chest 3 when (mixing) motor 2 starts to stirring impeller 5 stirs the material in the stock chest 3. Wherein the stirring impeller 5 comprises a horizontal section and two inclined sections connected to two ends of the horizontal section, one end of each inclined section is arranged in an upward inclined manner, and the other end of each inclined section is arranged in a downward inclined manner.
A transition hose 7 is connected between the storage tank 3 and the quantitative tank 9, a hard pipeline is connected between the transition hose 7 and the storage tank 3, and the hard pipeline is connected with the storage tank 3 in a sealing way; the top end of the hard pipeline is positioned in the storage tank 3, the top end of the hard pipeline is closed, and at least 1 plating solution filtering hole is distributed on the top end of the hard pipeline. The material in the storage tank 3 enters into the transition hose 7 through the hard pipeline, and the plating solution filter holes are arranged to transition the plating solution entering into the hard pipeline, so that the blocking caused by the entering of the bulk material into the pipeline is prevented.
A discharging hose 11 is connected to the discharging port of the dosing tank 9, and a first discharging valve and a second discharging valve are respectively arranged on the transition hose 7 and the discharging hose 11, wherein the first discharging valve and the second discharging valve are divided into a first pinch valve 8 and a second pinch valve 10.
The control module comprises a key circuit, a communication circuit, an alarm circuit, a display circuit, a storage circuit, a processing unit, a stirring motor control circuit, a stirring motor overheat protection circuit, a pinch valve control circuit and a liquid level acquisition circuit positioned in the quantitative tank. The processing unit comprises a singlechip U1 (the model is AT89S 52) and a peripheral circuit of the singlechip.
The signal output ends of the key circuit and the liquid level acquisition circuit are connected with the signal output end of the processing unit, and the signal output end of the processing unit is respectively connected with the communication circuit, the alarm circuit, the display circuit, the storage circuit, the stirring motor control circuit, the stirring motor overheat protection circuit and the pinch valve control circuit.
The peripheral circuit of the singlechip U1 comprises a clock circuit and a reset circuit, wherein the clock circuit comprises a second capacitor C2, a third capacitor C3 and a crystal oscillator Y1. The reset circuit includes a fourth capacitor C4 and a fourth resistor R4. The clock circuit and the reset circuit ensure the basic operation of the singlechip U1.
The key circuit comprises a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a first key S1, a second key S2, a third key S3 and a fourth key S4, wherein the first ends of the first key S1, the second key S2, the third key S3 and the fourth key S4 are all grounded, the second ends of the first key S1, the second key S2, the third key S3 and the fourth key S4 are respectively connected with the signal input ends (terminals P11/T, P, P13 and P14) of the singlechip U1, and the second ends of the first key S1, the second key S2, the third key S3 and the fourth key S4 are also grounded through the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7 and the eighth capacitor C8; in addition, the first end of the fifth key S5 is grounded, the second end of the fifth key S5 is connected to the signal input end (terminal P15) of the single chip microcomputer U1, and a user can set parameters in the working process of the single chip microcomputer through a key circuit.
The storage circuit comprises a storage chip U2 (the model is AT24C 02), a signal input end of a storage signal is connected with a signal output end (a terminal P21) of the singlechip U1, and the storage chip can be used for storing signals in the working process of the singlechip, so that data loss after power failure is prevented.
The pinch valve control circuit is used for controlling whether the pinch valve is opened or not, the pinch valve control circuit comprises a first pinch valve control circuit and a second pinch valve control circuit, the pinch valve control circuit comprises a third inverter U3C and a fourth inverter U3D, a third alternating current solid state relay SSR3 and a fourth alternating current solid state relay SSR4, signal output ends (terminals P16 and P17) of the singlechip U1 are respectively connected with input ends of the third inverter U3C and the fourth inverter U3D through a first port P1 and a second port P2, output ends of the third inverter U3C and the fourth inverter U3D are respectively connected with positive input ends of the third alternating current solid state relay SSR3 and the fourth alternating current solid state relay SSR4, and negative input ends of the third alternating current solid state relay SSR3 and the fourth alternating current solid state relay SSR4 are grounded; the output ends of the third alternating current solid state relay SSR3 and the fourth alternating current solid state relay SSR4 are respectively connected with the cathodes of the first pinch valve JGF1 and the second pinch valve JGF2, the anodes of the first pinch valve JGF1 and the second pinch valve JGF2 are connected with a power supply, and a first diode D1 and a second diode D2 are respectively connected between the anodes and the cathodes of the first pinch valve JGF1 and the second pinch valve JGF 2. The output ends of the third alternating current solid state relay SSR3 and the fourth alternating current solid state relay SSR4 are connected with pinch valve state indicating circuits, the two pinch valve state indicating circuits respectively comprise a first light emitting diode LED1, a second light emitting diode LED2, a first resistor R1 and a second resistor R2, and the anodes of the first light emitting diode LED1 and the second light emitting diode LED2 are respectively connected with the output ends of the third alternating current solid state relay SSR3 and the fourth alternating current solid state relay SSR 4; the cathodes of the first light emitting diode LED1 and the second light emitting diode LED2 are respectively connected with a direct current power supply through a first resistor R1 and a second resistor R2.
The singlechip outputs a control signal, and performs inverting amplification through a third inverter U3C and a fourth inverter U3D, and the amplified signal voltage is directly connected to the upper surfaces of a third alternating current solid state relay SSR3 and a fourth alternating current solid state relay SSR 4. When the singlechip outputs a high-level signal, the corresponding third alternating-current solid-state relay SSR3 and the fourth alternating-current solid-state relay SSR4 are in a closed state, otherwise, when the singlechip outputs a low level, the corresponding third alternating-current solid-state relay SSR3 and the fourth alternating-current solid-state relay SSR4 are in a conducting state, so that the singlechip outputs different control signals, and the purpose of controlling the two pinch valves to be attracted and disconnected is achieved. The first diode D1 and the second diode D2 are freewheeling diodes, and the first light emitting diode LED1 and the second light emitting diode LED2 are output indicator lamps of the first pinch valve and the second pinch valve respectively. The third alternating current solid state relay SSR3 and the fourth alternating current solid state relay SSR4 are adopted in the circuit, so that the interference to the singlechip in the control process is reduced, and the service life of the product can be prolonged.
The communication circuit can realize the transmission of parameters in the working process, and comprises a communication chip U4 (model number is MAX 485), a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8, wherein the signal input end of the communication chip U4 is connected with the signal output end of the singlechip U1 through ports P6, P5 and P7, so that 485 communication between the singlechip U1 and a computer is realized, and computer networking control and data acquisition are conveniently used.
The liquid level detection circuit is used for detecting liquid level information in the quantitative tank and realizing automatic quantitative feeding in the quantitative tank, the liquid level acquisition circuit further comprises a liquid level resistor R3, an adjustable resistor RW1, a comparator U5A, a first probe T1 and a second probe T2, the first probe T1 and the second probe T2 extend into the quantitative tank, the second probe T2 is grounded, the first probe T1 is connected with the non-inverting input end of the comparator U5A, the first probe T1 is also connected with a power supply through the liquid level resistor R3, and the first probe T1 is grounded through a liquid level capacitor C1. The inverting input end of the comparator U5A is connected with the adjustable end of the adjustable resistor RW1, the first end of the adjustable resistor RW1 is connected with a power supply, and the second end of the adjustable resistor RW1 is grounded; the signal output end of the comparator U5A is connected with the signal input end (terminal INT 1) of the singlechip through a port P3.
By adjusting the adjustable resistor RW1, the comparison value of the conductive voltages of different liquids can be changed, and the first probe T1 and the second probe T2 are required to be made of corrosion-resistant stainless steel or titanium metal. When the liquid level in the quantitative tank does not touch the first probe T1 and the second probe T2, the voltage on the liquid level capacitor C1 is 5V, and the singlechip outputs high level. When the liquid level reaches the probe position, the first probe T1 and the second probe T2 are turned on by the liquid, and the voltage above the liquid level capacitor C1 is the divided voltage value of the resistance of the liquid between the liquid level resistor R3 and the first probe T1. During debugging, the probe is turned on by liquid, and then the adjustable resistor RW1 is adjusted, so that the singlechip outputs low level. But the sensitivity cannot be tuned too high or else it easily becomes unreliable. When the first probe T1 and the second probe T2 output low levels, the voltage is transmitted to the singlechip, and the singlechip outputs a signal to stop the output of the first pinch valve.
The alarm circuit is used for sending out alarm sound when the abnormality appears, wherein the alarm circuit includes first triode Q1, second triode Q2 and bee calling organ FMQ1, the base of first triode Q1 is connected through port P4 to singlechip's signal output part (terminal INT 0), the power is connected to first triode Q1's collecting electrode, second triode Q2's base is connected through alarm resistor R5 to first triode Q1's projecting pole, second triode Q2's projecting pole ground connection, bee calling organ FMQ1 is connected to second triode Q2's collecting electrode. When abnormality occurs, the singlechip U1 outputs a high level, the voltage is buffered by the first triode Q1 and then is added to the base of the second triode Q2 through the alarm resistor R5, the second triode Q2 is conducted, and the alarm FMQ1 sends out an acousto-optic signal to prompt an operator to process.
The stirring motor control circuit comprises a first inverter U3A and a second inverter U3B, a first alternating current solid state relay SSR1 and a second alternating current solid state relay SSR2, wherein signal output ends (terminals RD and WR) of the single chip microcomputer U1 are respectively connected with input ends of the first inverter U3A and the second inverter U3B through a port P8 and a port P9, the output ends of the first inverter U3A and the second inverter U3B are respectively connected with positive input ends of the first alternating current solid state relay SSR1 and the second alternating current solid state relay SSR2, and negative input ends of the first alternating current solid state relay SSR1 and the second alternating current solid state relay SSR2 are grounded; the output ends of the first alternating current solid state relay SSR1 and the second alternating current solid state relay SSR2 are connected with windings of the stirring motor; a control capacitor C16 is connected between the two windings of the stirring motor.
The singlechip outputs two paths of signals which are respectively positive direction control signals of the stirring motor. The first inverter U3A and the second inverter U3B respectively form an inverting buffer, and the two buffered voltage signals are respectively added to the input ends of the first alternating current solid state relay SSR1 and the second alternating current solid state relay SSR 2. When the singlechip outputs a high-level signal, the corresponding first alternating current solid state relay SSR1 and the second alternating current solid state relay SSR2 are cut off; on the contrary, when the singlechip outputs a low level, the corresponding first alternating current solid state relay SSR1 and the second alternating current solid state relay SSR2 are in a conducting state. Thus, the two pins of the singlechip output different control signals, and the aim of controlling the stirring motor to rotate positively and negatively or stop can be achieved.
In order to ensure the normal operation of the stirring motor, the stirring motor protection circuit further comprises a fuse, a ninth resistor, a tenth resistor, a photoelectric coupler and a fifteenth capacitor. In a normal state, the voltage of the alternating current 220v is connected to the input end of the photoelectric coupler U6 through the ninth resistor R9 and the third diode D3, the fifteenth capacitor C15 is a filter capacitor, and the output end of the photoelectric coupler is connected in series with the tenth resistor R10. At this time, the photocoupler is in a conducting state, the voltage on the tenth resistor R10 is about 4.7v, the ninth capacitor C9 also has a filtering function, and the voltage is directly applied to the input end of the singlechip. When the motor is short-circuited, the fuse F1 is fused, the photoelectric coupler is in a cut-off state, and the signal input end of the singlechip becomes low level, so that a fault processing program can be executed.
The overheat protection circuit of the stirring motor comprises a temperature control switch TK1 arranged on the shell of the stirring motor, and the signal output end of the temperature control switch TK1 is connected with the signal input end (terminal P10/T) of the singlechip U1.
The temperature control switch TK1 is a normally open point temperature switch with the temperature of 80 degrees, the temperature switch is fixed on the stirring motor shell, when the temperature of the motor shell reaches 80 degrees, the temperature switch is turned on, the pin of the singlechip becomes low level, and a fault processing program can be executed.
The display circuit comprises a liquid crystal screen YJP1 and a resistor-array RP1, and the signal output end of the singlechip is connected with the resistor-array RP1 and the signal input end of the liquid crystal screen YJP1 through ports P10-P22 respectively.
The sand feeding device can realize short-time interval and accurate quantitative sand feeding, so that the distribution density of particles on a steel wire is uniform, and the product quality can be improved to a great extent.
The working process is as follows: adding the plating solution into the storage tank, and stirring the plating solution by forward and backward rotation of the stirring motor; when the plating solution is required to be added into the quantitative tank, the first pinch valve is opened, and the plating solution is added into the quantitative tank; when discharging liquid, the second pinch valve is opened, and the liquid is discharged through the discharging hose.
The invention also discloses an automatic sand adding method for diamond wire saw production by using the device, which sequentially comprises the following steps: (1) Adding sand and electroplating solution into a storage tank through a hopper; (2) The stirring motor adopts forward rotation for a period of time, stops for a period of time, and then reversely rotates for a period of time to stir the materials in the storage tank; (3) In the blanking process, the first pinch valve is opened, materials in the storage tank fall into the quantifying tank through the transition hose until the materials contact with the probe in the quantifying tank, the first pinch valve is closed, the second pinch valve is opened, and the materials in the quantifying tank enter equipment needing sand adding through the blanking hose.
The device provided by the invention has a simple mechanical structure, maintenance operation is basically not needed in the production process, the cost is low, the failure rate is greatly reduced, the popularization is convenient, when the equipment works, one class only needs to add sand consumption of one class into the sand adding machine, the middle is not needed to be added, the labor intensity of manpower can be reduced, and meanwhile, the adverse effect caused by most of human factors is avoided.
Claims (3)
1. An automatic sand adding method for diamond wire saw production is characterized in that: the method comprises the following steps:
(1) Adding sand and electroplating solution into a storage tank through a hopper;
(2) The stirring motor adopts forward rotation for a period of time, stops for a period of time, and then reversely rotates for a period of time to stir the materials in the storage tank;
(3) In the blanking process, the first pinch valve is opened, the material in the storage tank falls into the quantifying tank through the transition hose until the material contacts with the probe in the quantifying tank, the first pinch valve is closed, the second pinch valve is opened, and the material in the quantifying tank enters into equipment needing sand adding through the blanking hose;
the method is realized based on an automatic sand feeding device for diamond wire saw production, and the device comprises a control module, a storage tank and a quantitative tank positioned below the storage tank; a stirring impeller is arranged at the lower part in the storage tank, a stirring shaft which is vertically arranged is connected to the stirring impeller, and a stirring motor is connected to the stirring shaft in a transmission way; a transition hose is connected between the storage tank and the quantitative tank, a discharging hose is connected to a discharging port of the quantitative tank, and a first discharging valve and a second discharging valve are respectively arranged on the transition hose and the discharging hose; the control module comprises a processing unit and a liquid level acquisition circuit positioned in the quantitative tank, the liquid level acquisition circuit transmits acquired liquid level information to the processing unit, and the processing unit outputs a signal to control the first blanking valve to work;
the first blanking valve and the second blanking valve are divided into a first pinch valve and a second pinch valve;
a hard pipeline is connected between the transition hose and the storage tank, and the hard pipeline is connected with the storage tank in a sealing way; the top end of the hard pipeline is positioned in the storage tank, the top end of the hard pipeline is closed, and at least 1 plating solution filtering hole is distributed on the top end of the hard pipeline;
the material storage tank is made of transparent materials; scales are arranged on the side wall of the storage tank;
the control module further comprises a stirring motor control circuit, a stirring motor overheat protection circuit and a pinch valve control circuit, wherein the stirring motor overheat protection circuit is connected with the signal input end of the processing unit, and the signal output end of the processing unit is respectively connected with the stirring motor control circuit and the pinch valve control circuit;
the stirring motor control circuit comprises a first inverter, a second inverter, a first alternating-current solid-state relay and a second alternating-current solid-state relay, wherein the signal output end of the processing unit is connected with the input end of the first inverter and the input end of the second inverter respectively, the output end of the first inverter and the output end of the second inverter are connected with the positive input end of the first alternating-current solid-state relay and the positive input end of the second alternating-current solid-state relay respectively, and the negative input end of the first alternating-current solid-state relay and the negative input end of the second alternating-current solid-state relay are grounded; the output ends of the first alternating current solid state relay and the second alternating current solid state relay are connected with windings of the stirring motor;
the stirring motor overheat protection circuit comprises a temperature control switch arranged on the stirring motor shell, and a signal output end of the temperature control switch is connected with a signal input end of the processing unit;
the pinch valve control circuit comprises a third inverter, a fourth inverter and a third alternating current solid-state relay, wherein the signal output end of the processing unit is connected with the input end of the third inverter and the input end of the fourth inverter respectively, the output end of the third inverter and the output end of the fourth inverter are connected with the positive input end of the third alternating current solid-state relay and the positive input end of the fourth alternating current solid-state relay respectively, and the negative input end of the third alternating current solid-state relay and the negative input end of the fourth alternating current solid-state relay are grounded; the output ends of the third alternating current solid state relay and the fourth alternating current solid state relay are respectively connected with the first pinch valve and the second pinch valve; the output ends of the third alternating current solid state relay and the fourth alternating current solid state relay are respectively connected with a pinch valve state indicating circuit, the two pinch valve state indicating circuits comprise light emitting diodes and resistors, and the anodes of the two light emitting diodes are respectively connected with the output ends of the third alternating current solid state relay and the fourth alternating current solid state relay; the cathodes of the two light emitting diodes are respectively connected with a direct current power supply through two resistors;
the control module also comprises a communication circuit and an alarm circuit, wherein the communication circuit and the alarm circuit are respectively connected with the signal output end of the processing unit; the communication circuit comprises a communication chip which is connected with the signal output end of the processing unit; the alarm circuit comprises a first triode, a second triode, an alarm circuit and a buzzer, wherein the signal output end of the processing unit is connected with the base electrode of the first triode, the collector electrode of the first triode is connected with a power supply, the emitter electrode of the first triode is connected with the base electrode of the second triode through an alarm resistor, the emitter electrode of the second triode is grounded, and the collector electrode of the second triode is connected with the buzzer;
the liquid level acquisition circuit further comprises a liquid level resistor, an adjustable resistor, a comparator and two probes, wherein the two probes extend into the quantitative groove, one probe is grounded, the other probe is connected with the non-inverting input end of the comparator, the inverting input end of the comparator is connected with the adjustable end of the adjustable resistor, the first end of the adjustable resistor is connected with a power supply, and the second end of the adjustable resistor is grounded; the signal output end of the comparator is connected with the signal input end of the processing unit.
2. The automatic sand feeding method for diamond wire saw production according to claim 1, wherein: the control module also comprises a display circuit, the display circuit comprises a liquid crystal screen and a discharge resistor, and the signal output end of the processing unit is connected with the signal input ends of the discharge resistor and the liquid crystal screen.
3. The automatic sand feeding method for diamond wire saw production according to claim 2, wherein: the control module also comprises a storage circuit, and the signal output end of the processing unit is connected with the storage circuit.
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