CN1528506A - Six-cylinder positioning control method for artificial diamond press - Google Patents
Six-cylinder positioning control method for artificial diamond press Download PDFInfo
- Publication number
- CN1528506A CN1528506A CNA2003101060675A CN200310106067A CN1528506A CN 1528506 A CN1528506 A CN 1528506A CN A2003101060675 A CNA2003101060675 A CN A2003101060675A CN 200310106067 A CN200310106067 A CN 200310106067A CN 1528506 A CN1528506 A CN 1528506A
- Authority
- CN
- China
- Prior art keywords
- cylinders
- proportioning valve
- control
- cylinder
- work step
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Control Of Presses (AREA)
Abstract
The invention is a six-cylinder positioning control method of hexad top artificial diamond press. The travels of the six cylinders are measured by linear displacement sensors, respectively, and converted into absolute travel displacement digital quantity by A/D converter, the set values of the hammer stop position are subtracted from the absolute travels of three active cylinders to obtain three relative travels, one way of each relative travel is multiplied by the amplifying coefficient and added to the constant to obtain the control quantity of each active cylinder's idle stroke advancing working step; the difference of the other one with the set value of liquid charging position is multiplied by the amplifying coefficient and added to the constant to obtain the control quantity of each active cylinder's liquid charging working step; the differences of the absolute travels of three fixed cylinders with the set valves of the fixed cylinders' position and liquid charging position are multiplied by the amplifying coefficients and added to the constants to obtain the control quantities of the three fixed cylinders' working steps; all the control quantities enter the selector, are selected according current working step, then converted into analogue quantity through limiter and D/A converter and finally sent to valve proportional amplifier and proportional valve to control the idle stroke advancing and liquid charging working step travel.
Description
Technical field
What the present invention relates to is a kind of six cylinder position control methods that are used for the cubic apparatus man-made diamond pressing machine, particularly a kind of six cylinder position control methods by computer-controlled cubic apparatus man-made diamond pressing machine.Belong to man-made diamond pressing machine positioning control technical field.
Background technology
At present, what six cylinder position control methods of cubic apparatus man-made diamond pressing machine adopted basically is a formula control method, when " idle running is advanced " work step, detect three cylinders alive near switch and whether arrive hammer-stopping position, in case arrive the fuel feeding that promptly cuts off hydraulic jack by induction type; Then no longer control the location of six cylinders at " topping up " work step.The defective of the method is to stop hammer when " idle running is advanced " work step inaccurate, easily produces the situation that does not contact synthetic piece of pyrophillite or the synthetic piece of crushing pyrophillite as yet; The adjustment difficulty of hammer-stopping position; Because of uncontrollable liquid-filling position, easily make six hammer eharge strokes asynchronous, easily produce and squeeze hammer, bump hammer, blow out accident.
Summary of the invention
The objective of the invention is to defective at above-mentioned existence, propose a kind of by the computer-controlled six cylinder position control methods that are used for the cubic apparatus man-made diamond pressing machine, computer is according to the difference between measured six cylinder physical locations of displacement transducer and the setting value, control the oil inlet quantity that enters six oil cylinders respectively by six electro-hydraulic proportional valves and put technical solution of the present invention with pace and the hammer-stopping position of controlling each cylinder:
(1) respectively three cylinder strokes alive is measured with Linear displacement transducer, be converted to the displacement digital quantity through the A/D analog-digital converter, this displacement digital quantity is the absolute stroke of three cylinders alive, absolute stroke enters subtracter with the hammer-stopping position value of setting and subtracts each other, obtaining three cylinders alive is the stroke of benchmark, i.e. relative travel with the hammer-stopping position; Its relative travel one tunnel enters multiplier with amplification coefficient and multiplies each other, and enters adder and constant addition again, obtains the advance proportioning valve aperture controlled quentity controlled variable of work step of idle running; Another road enters subtracter and the liquid-filling position value of setting is subtracted each other, difference enters multiplier and amplification coefficient multiplies each other, enter the adder addition with constant again, obtain the proportioning valve aperture controlled quentity controlled variable of topping up work step, the advance proportioning valve aperture controlled quentity controlled variable of work step and the proportioning valve aperture controlled quentity controlled variable of topping up work step of the idle running that more than obtains enters selector together, selects corresponding proportioning valve aperture controlled quentity controlled variable through the limiter amplitude limit according to current work step, the D/A digital to analog converter send valve to advance and topping up work step stroke with the idle running that proportional amplifier and proportioning valve go respectively to control three cylinders alive after being converted to analog quantity; (2) respectively three dead cylinder strokes are measured with Linear displacement transducer, be converted to the displacement digital quantity through the A/D analog-digital converter, entering subtracter with dead cylinder position value of setting, the liquid-filling position value of setting subtracts each other, its difference enters multiplier and amplification coefficient multiplies each other, enter the adder addition with constant again, obtain the proportioning valve aperture controlled quentity controlled variable of topping up work step, after limiter amplitude limit, D/A digital to analog converter are converted to analog quantity, send valve to remove to control the eharge stroke of three dead cylinders respectively with proportional amplifier and proportioning valve.
Because the particularity of cubic apparatus man-made diamond pressing machine, each cylinder reaches in the work steps such as " topping ups " " idle running is advanced " and all can only unidirectionally advance and can not retreat, and bumps hammer, crowded hammer accident in case stroke walks far promptly may produce, and can bring harm to press.If adopt conventional proportional plus integral control meeting to bring " overshoot " problem (promptly producing the problem that stroke walks far), this is that institute is unallowed in the control of cubic apparatus man-made diamond pressing machine, and simple proportion control can not be eliminated surplus poor (regulated variable and set amount are unequal), the present invention utilizes the unidirectional capacity characteristic of cubic apparatus man-made diamond pressing machine system oil cylinder, the control algolithm of employing vast scale degree adds the non-overshoot of certain control time realization proportional plus integral control effect, the control of nothing left difference, the integration control effect of its nothing left difference is controlled resulting less control output by the vast scale degree and is combined generation (the difference existence if having a surplus with the unidirectional capacity characteristic of press oil cylinder, control output is just arranged, just oil transportation in oil cylinder, oil cylinder will advance, it is surplus poor to reduce, surplus difference will be eliminated after a period of time, vanishing is exported in control), and the control of vast scale degree itself promptly has the control effect of non-overshoot.
The size of the proportional band in the control algolithm is reflected in two amplification coefficients, and amplification coefficient is more little, and proportional band is just big more.Two amplification coefficient spans of the present invention are respectively-10～-30 ,-20～-40.It is minus infinity that traditional position formula control is equivalent to the amplification coefficient value.
Because proportioning valve itself has bigger dead band, the present invention introduces constant, its effect is to overcome the influence of the dead band of proportioning valve to the control quality, because the inconsistency of proportioning valve characteristic, the dead band of each valve might not be identical, adjust so constant needs according to the characteristic of on-the-spot proportioning valve and the working control effect is on-the-spot, general span is 5～25%.
Because proportioning valve its aperture when being input as 70% left and right sides just reaches standard-sized sheet substantially, so the present invention is provided with limiter, its amplitude limit value span is 60%～80%.
The control target of multiplier, amplification coefficient, adder and these several modules of constant is that to make three cylinders alive all be parked in stroke when " idle running is advanced " work step be the 0mm place.The control target of another multiplier, amplification coefficient, adder and these several modules of constant is when " topping up " work step six cylinders all to be parked on the liquid-filling position value of setting.
The present invention also is provided with and stops hammering into shape overproof warning and the overproof warning of liquid-filling position, and is capable of automatic alarm when accident occurring, and system is stopped in emergency to prevent squeezing hammer, to bump the generation of hammering into shape and blowing out accident.
The present invention compares with background technology, has following advantage: each cylinder positioning control accuracy height, can guarantee press synthetic diamond under the operating mode of each hammer centering; Hammer-stopping position, liquid-filling position are provided with conveniently; the control parameter adjustment is convenient; the alarm and protection function is arranged; make and take place to squeeze hammer, bump hammer, the probability of accident of blowing out significantly reduces; thereby the hammer consumption is reduced; extend to 9000 piece/hammer cover by 3000 of general compactings/hammer cover the service life of press hammer, thereby produce substantial economics.
Description of drawings
Accompanying drawing 1 is the positioning control schematic diagram of the present invention to three cylinders alive;
Accompanying drawing 2 is the present invention's positioning control schematic diagrams to three dead cylinders;
Accompanying drawing 3 is to the positioning control schematic diagram of three cylinders alive in the embodiments of the invention.
The meaning of code name among the figure:
L1/L2/L3: the displacement stroke that is respectively three cylinders alive;
L4/L5/L6: the displacement stroke that is respectively three dead cylinders;
CGQ: be Linear displacement transducer;
A/D: analog quantity/digital quantity converter;
TCW: the hammer-stopping position value of setting;
CYW: the liquid-filling position value of setting;
TCBJ: the overproof warning of hammer-stopping position;
CYBJ: the overproof warning of liquid-filling position;
SGW: dead cylinder hammer position is provided with;
JNF1, JNF2, JNF3: subtracter 1, subtracter 2, subtracter 3;
CF1, CF2: multiplier 1, multiplier 2;
JAF1, JAF2: adder 1, adder 2;
K1, K2: amplification coefficient 1, amplification coefficient 2;
A1, A2: constant 1, constant 2;
XZQ: selector;
XFQ: limiter;
D/A: digital quantity/analog quantity converter;
BLQ: valve proportional amplifier;
BLF: proportioning valve;
HG: the cylinder of living;
SG: dead cylinder;
IPC: industrial control computer.
The specific embodiment
With embodiment the specific embodiment of the present invention is described below.
Contrast accompanying drawing 3, Linear displacement transducer CGQ adopt straight sliding conductive plastics Linear displacement transducer, measurement category 0-100mm, and precision is 0.1%;
The hammer-stopping position value of setting TCW according to the field condition setting, is generally 60mm by the operator;
The liquid-filling position value of setting CYW according to the field condition setting, is generally 3mm by the operator;
The dead cylinder hammer position value of setting SGW by the operator according to the field condition setting; Be generally 60mm;
Amplification coefficient K1 initial value is made as-15, can adjust between-10～-30 according to stopping hammering the positioning control effect into shape;
Amplification coefficient K2 initial value is made as-30, can adjust between-20～-40 according to topping up positioning control effect and topping up synchronous situation;
Constant A 1 initial value is made as 10, can adjust between 5～25 according to the dead band characteristic and the control effect of proportioning valve;
Constant A 2 initial values are made as 10, can adjust between 5～25 according to the dead band characteristic and the control effect of proportioning valve;
The overproof warning TCBJ of hammer-stopping position value is made as 0.3mm;
The overproof warning CYBJ of liquid-filling position value is made as 0.3mm;
Limiter XFQ is made as 70%, depends on the standard-sized sheet characteristic of proportioning valve;
A/D selects the analog acquisition card that contains 12 analog quantity/digital quantity converters for use;
D/A selects the analog output unit that contains 12 bit digital quantity/analog quantity converter for use;
Industrial control computer IPC selects for use Taiwan to produce huge rock instrument IPC-830 industrial control computer, and CPU is P4 1.6G, 256 MB of memory, 40G hard disk;
Proportional amplifier BLQ select 24V power supply power supply, 0-5V input for use with the supporting product of proportion directional valve;
Proportioning valve BLF selects the proportion directional valve for use.
In an embodiment of the present invention, the function that begins whole pilot process till D/A from A/D realizes by an industrial control computer (IPC), A/D includes eight tunnel 12 analog quantity/digital quantity converters for inserting the analog acquisition card in the industrial control computer; D/A includes six tunnel 12 bit digital quantity/analog quantity converter for inserting the analog output unit in the industrial control computer; The setting of various additions, subtraction, multiplication, selection, amplitude limit, comparison operation, the hammer-stopping position value of setting, the liquid-filling position value of setting, the position setting of dead cylinder hammer, the overproof warning of hammer-stopping position, the overproof warning of liquid-filling position and various amplification coefficient K1, K2, constant A 1, A2 realizes by the operation monitoring software of computer.
The stroke L1/L2/L3 of three cylinders alive (be respectively, preceding, right cylinder) measures the displacement voltage signal that obtains 0～5V with Linear displacement transducer CGQ respectively, the A/D converter of sending into computer is converted to the digital displacement amount of 0～100mm, this digital displacement amount is the absolute stroke of three cylinders alive, absolute stroke deduct obtain behind the hammer-stopping position value of setting TCW (60mm) stroke that each cylinder is benchmark with the hammer-stopping position (60～40mm), i.e. relative travel; Relative travel is about when " idle running is advanced " work step-and 60～0mm, be 0～3mm at " topping up " work step, the stroke between 3～5mm is synthetic stroke, 5～40mm is useless stroke.When " idle running is advanced " work step, it is 0～900 that relative travel multiply by amplification coefficient K1 (15) total through multiplier CF1, adds that by adder JAF1 constant A 1 is 10 again, and the proportioning valve aperture controlled quentity controlled variable of feasible " idle running is advanced " is between 10～910; Entering limiter XFQ amplitude limit behind selector XZQ is 10～70%, be converted to by D/A after the control signal of 0～5V from computer output send valve with proportional amplifier BLQ and proportioning valve BLF go respectively to control, the oil inlet quantity of preceding, three cylinders alive in the right side to be to control " idle running is advanced " stroke of these three cylinders.
Because the effect of amplification coefficient K1, when making the relative travel of each cylinder between-60～a certain value, unify amplitude limit to 70% all greater than 70% by limiter through " idle running is advanced " controlled quentity controlled variable that computing obtains, proportioning valve is worked under the state near standard-sized sheet.When amplification coefficient K1 each cylinder relative travel for-10 time reach-6mm in, amplification coefficient K1 for-30 o'clock each cylinder relative travels reach-2mm in the time just begin to reduce proportioning valve aperture, reduce the oil inlet quantity of each cylinder, to reduce the pace of each cylinder, make each cylinder progressively slowly, steadily to the hammer-stopping position of " idle running is advanced " near (making relative travel be tending towards 0mm), and finally be parked on the hammer-stopping position accurately.The value of amplification coefficient K1 is generally-15, can stop hammering into shape the positioning control effect and adjusts between-10～-30 according to actual.
Surpass the overproof warning TCBJ of hammer-stopping position value (0.3mm) if stop hammering into shape error, computer just sends an alarm signal.
When " topping up " work step; Relative travel deducts the liquid-filling position value of setting CYW (3mm) through subtracter LNF2, obtain the difference (3～0) of relative travel and liquid-filling position, entering multiplier CF2 afterwards, to multiply by amplification coefficient K2 (30) total be 0～90, add constant A 2 (10) by adder JAF2 again, the proportioning valve aperture controlled quentity controlled variable of feasible " topping up " work step is between 10～100; Through selector XZQ, limiter XFQ amplitude limit is 10～70%, be converted to by D/A after the control signal of 0～5V from computer output send valve with proportional amplifier BLQ, proportioning valve BLF go respectively to control, the oil inlet quantity of preceding, three cylinders alive in the right side is with " topping up " stroke of controlling these three cylinders and each cylinder is parked on the liquid-filling position value of setting (difference of relative travel and liquid-filling position is 0).If occur asynchronous situation of advancing during each cylinder topping up, can reach the purpose that realizes advanced in unison by the K2 coefficient of adjusting separately.
Because the effect of amplification coefficient K2, make the relative travel of each cylinder when shifting to an earlier date beyond some mm for liquid-filling position, " topping up " Stroke Control amount that obtains through computing is unified amplitude limit to 70% all greater than 70% by limiter, and proportioning valve is worked under the state near standard-sized sheet.Each cylinder relative travel shifts to an earlier date 3mm for liquid-filling position when amplification coefficient K2 is-20, amplification coefficient K2 is the aperture that just begins to reduce proportioning valve at-40 o'clock when each cylinder relative travel shifts to an earlier date in the 1.5mm for liquid-filling position, the oil inlet quantity that reduces each cylinder, to reduce the pace of each cylinder, make each cylinder progressively slowly, steadily close to liquid-filling position, and finally be parked on the liquid-filling position accurately.The value of amplification coefficient K2 is generally-30, can control effect according to actual location and adjust between-20～-40.Surpass the overproof warning CYBJ of liquid-filling position value 0.3mm if " topping up " stroke stops hammering into shape error, computer just sends an alarm signal.
In addition, three dead cylinders (are respectively down, after, left side cylinder) stroke L4/L5/L6 measures the displacement voltage signal that obtains 0～5V with Linear displacement transducer CGQ respectively, the A/D converter of sending into computer is converted to the digital displacement amount of 0～100mm, because three dead cylinders are failure to actuate when " idle running is advanced " work step, it is when " topping up " work step, the scope of above-mentioned digital displacement amount is 60～63mm, obtain difference (3～0mm) after deducting the hammer-stopping position value of setting TCW (60mm) and liquid-filling position value of setting (3mm), entering multiplier CF2 afterwards, to multiply by amplification coefficient K2 (30) total be 0～90, add constant A 2 (10) by adder JAF2 again, the proportioning valve aperture controlled quentity controlled variable of feasible " topping up " work step is between 10～100; Through selector XZQ, limiter XFQ amplitude limit is 10～70%, be converted to by D/A after the control signal of 0～5V from computer output send valve with proportional amplifier BLQ, proportioning valve BLF go respectively to control down, afterwards, the oil inlet quantity of left three dead cylinders is with " topping up " stroke of controlling these three cylinders and each cylinder is parked on the liquid-filling position value of setting.
Claims (2)
1, a kind of man-made diamond pressing machine six cylinder position control methods, it is characterized in that (one) measures three cylinder strokes alive (L1/L2/L3) respectively with Linear displacement transducer (CGQ), be converted to the displacement digital quantity through the A/D analog-digital converter, this displacement digital quantity is the absolute stroke of three cylinders alive, absolute stroke enters subtracter (JNF1) with hammer-stopping position value of setting (TCW) and subtracts each other, obtaining three cylinders alive is the stroke of benchmark, i.e. relative travel with the hammer-stopping position; Its relative travel one tunnel enters multiplier (CF1) with amplification coefficient (K1) and multiplies each other, and enters adder (JAF1) and constant (A1) addition again, obtains the advance proportioning valve aperture controlled quentity controlled variable of work step of idle running; Another road enters subtracter (JNF2) and subtracts each other with liquid-filling position value of setting (CYW), difference enters multiplier (CF2) and multiplies each other with amplification coefficient (K2), enter adder (JAF2) addition with constant (A2) again, obtain the proportioning valve aperture controlled quentity controlled variable of topping up work step, the advance proportioning valve aperture controlled quentity controlled variable of work step and the proportioning valve aperture controlled quentity controlled variable of topping up work step of the idle running that more than obtains enters selector (XZQ) together, selects corresponding proportioning valve aperture controlled quentity controlled variable through limiter (XFQ) amplitude limit according to current work step, the D/A digital to analog converter send valve to advance and topping up work step stroke with the idle running that proportional amplifier (BLQ) and proportioning valve (BLF) go respectively to control three cylinders alive (HG) after being converted to analog quantity; (2) respectively three dead cylinder strokes (L4/L5/L6) are measured with Linear displacement transducer (CGQ), be converted to the displacement digital quantity through the A/D analog-digital converter, with dead cylinder position value of setting (SGW), liquid-filling position value of setting (CYW) enters subtracter (JNF3) together and subtracts each other, its difference enters multiplier (CF2) and multiplies each other with amplification coefficient (K2), enter adder (JAF2) addition with constant (A2) again, obtain the proportioning valve aperture controlled quentity controlled variable of topping up work step, through limiter (XFQ) amplitude limit, the D/A digital to analog converter send valve to remove to control the eharge stroke of three dead cylinders (SG) respectively with proportional amplifier (BLQ) and proportioning valve (BLF) after being converted to analog quantity.
2, a kind of man-made diamond pressing machine six cylinder position control methods as claimed in claim 1, it is characterized in that amplification coefficient (K1) span is-10～-30, amplification coefficient (K2) span is-20～-40, and the span of constant (A1), (A2) is 5～25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310106067 CN1235673C (en) | 2003-10-15 | 2003-10-15 | Six-cylinder positioning control method for artificial diamond press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310106067 CN1235673C (en) | 2003-10-15 | 2003-10-15 | Six-cylinder positioning control method for artificial diamond press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1528506A true CN1528506A (en) | 2004-09-15 |
| CN1235673C CN1235673C (en) | 2006-01-11 |
Family
ID=34304409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310106067 Expired - Fee Related CN1235673C (en) | 2003-10-15 | 2003-10-15 | Six-cylinder positioning control method for artificial diamond press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1235673C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2538595A (en) * | 2015-03-17 | 2016-11-23 | Element Six (Uk) Ltd | Press apparatus and methods of controlling same |
-
2003
- 2003-10-15 CN CN 200310106067 patent/CN1235673C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2538595A (en) * | 2015-03-17 | 2016-11-23 | Element Six (Uk) Ltd | Press apparatus and methods of controlling same |
| GB2538595B (en) * | 2015-03-17 | 2018-04-11 | Element Six Uk Ltd | Press apparatus and methods of controlling same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1235673C (en) | 2006-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1258431C (en) | Method for compensating error of numeric-contrlled machine and system | |
| CN1857831A (en) | Pressure jetting unit for pressure casting machine and its control method | |
| CN204359529U (en) | A kind of power load charger for aircraft bearing exerciser | |
| CN103837339B (en) | A kind of dynamic servo power-driven system | |
| CN1292092A (en) | Method for controlling IC handler and control system using same | |
| CN1235673C (en) | Six-cylinder positioning control method for artificial diamond press | |
| CN104759926B (en) | A kind of automobile spoke special tooling | |
| CN1749710A (en) | Electronic weighing system for loading machine and method for metering loading capacity | |
| CN201645575U (en) | Head saw raising automatic adjusting mechanism of computer penal saw | |
| CN107234672A (en) | The tool structure cut for timber | |
| CN1246094C (en) | Heavy and medium plate mill non-retraction precision variation quick-speed roll seam initialization method | |
| CN1230270C (en) | Computerized control method for photopelecronically controlled automatic rod material sawing | |
| CN217156249U (en) | Measuring equipment for adhesive strength of cohesive soil and metal surface | |
| CN1765611A (en) | Plastic jetting-moulding machine control device and method | |
| CN1108918C (en) | A planger-type hexagonal upward hydraulic press and method for measuring and controlling shift of upward hammer | |
| CN101073832A (en) | Method for densifying powdery pressed ingot by vibration | |
| CN102699251A (en) | Travelling table and control system for large-stroke hydraulic forging press | |
| CN1943986A (en) | Crank shaft non-circular grinding movement control mathematical model | |
| CN2684158Y (en) | Length measuring and weighting device for steel pipe | |
| CN205037867U (en) | A three -dimensional dynamic measurement system for bucket -wheel stacker reclaimer | |
| CN204258528U (en) | A kind of anti-folding and anti-pressing testing machine electric cylinder | |
| CN2864772Y (en) | Automatic control device for final position of moving parts | |
| CN202241477U (en) | Automatic regulation mechanism for protruding height of saw bit | |
| CN202242030U (en) | High speed hydraulic press for composite material products | |
| CN202519581U (en) | Automatic prestress intelligent stretching device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |