CN108480624B - A kind of powder is incremented by pressure setting and drawing method - Google Patents
A kind of powder is incremented by pressure setting and drawing method Download PDFInfo
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- CN108480624B CN108480624B CN201810332265.XA CN201810332265A CN108480624B CN 108480624 B CN108480624 B CN 108480624B CN 201810332265 A CN201810332265 A CN 201810332265A CN 108480624 B CN108480624 B CN 108480624B
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- former
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- embryo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/004—Filling molds with powder
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- Mechanical Engineering (AREA)
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- Fats And Perfumes (AREA)
Abstract
The present invention discloses a kind of powder and is incremented by pressure setting and drawing method, belong to material processing and mechanical equipment technical field, including upper punch, upper punch hydraulic stem, preceding former, former afterwards, former hydraulic stem, bottom punch, stripper plate, stripper plate hydraulic stem, former hydraulic stem servo motor, upper punch hydraulic stem servo motor, stripper plate hydraulic stem servo motor, powder is incremented by compacting compared with primary compacting, in bottom end, consistency is dominant with two aspect performance of average density, so that pressure embryo even density, product final performance improves, the present invention realizes electrical and its automation control, improve production efficiency, reduce production cost, reduce manual work's intensity, improve safety in utilization, in addition to this, by providing high-power mode and low-power mode, reduce energy consumption, it improves efficiency.
Description
Technical field
The present invention relates to a kind of powder to be incremented by pressure setting and drawing method, belongs to material processing and leads with mechanical equipment technology
Domain.
Background technique
Forming is the basic powder metallurgy process that importance is only second to sintering, more limits and determines than other processes
The entire production process of powder metallurgy.Manufacturing process it is reasonable whether directly determine that can entire production process go on smoothly；It influences
Subsequent each technique and its end product quality；Influence automation, productivity and the production cost of production.
In powder compaction process, the porosity of body of powder is reduced after compacting, and pressure embryo relative density is apparently higher than body of powder
Density, but as axial compressive force is applied to body of powder, the behavior of similar fluid, Xiang Yinmo die wall are shown to a certain extent
Apply active force, lead to the generation of lateral pressure, and rub between powder particle in addition, pressure transmitting is uneven, causes to press in embryo
Different parts Density inhomogeneity, and then influence product final performance.
The prior art mainly adopts the technique of a compression moulding, the pressure embryo of a compression moulding can have pressure embryo density not
Uniform problem, i.e., particularly problematic in bottom end consistency and two aspect of average density, in addition to this, existing equipment is most
Production efficiency is not high, consumes energy more serious.
Summary of the invention
The present invention provides a kind of incremental pressure setting of powder, including upper punch 1, upper punch hydraulic stem 2, preceding former 3, rear yin
Mould 4, former hydraulic stem 5, bottom punch 6, stripper plate 7, stripper plate hydraulic stem 8, former hydraulic stem servo motor 16, upper punch are hydraulic
Bar servo motor 17, stripper plate hydraulic stem servo motor 18, upper punch 1 and upper punch hydraulic stem 2 are located at preceding former 3, rear former 4
Top, upper punch 1 and four upper punch hydraulic stems 2 are cooperatively connected, and the axis of upper punch 1 is closed with preceding former 3 and rear former 4
Central axes after conjunction are overlapped, and the setting of bottom punch 6 in the following, be provided with demoulding mouth on bottom punch 6, demoulds mouth in preceding former 3, rear former 4
Upper setting stripper plate 7, is arranged four former hydraulic stems 5 between preceding former 3 and rear former 4, four former hydraulic stems 5 are symmetrical two-by-two
Setting, rear former 4, bottom punch 6 are fixed, and preceding former 3 and four cooperations of former hydraulic stem 5 push preceding former 3 mobile, demoulding
Plate 7 is connect with stripper plate hydraulic stem 8, and stripper plate hydraulic stem 8 moves stripper plate 7；Four upper punch hydraulic stems 2 are simultaneously by upper mold
Fliud flushing compression bar servo motor 17 drives, and four former hydraulic stems 5 are driven by former hydraulic stem servo motor 16 simultaneously, stripper plate liquid
Compression bar 8 is driven by stripper plate hydraulic stem servo motor 18.
It further includes conveyer belt 9, push plate 10, push plate connecting rod 11, guide rail 12, conveyer belt servo that the powder, which is incremented by pressure setting,
Motor 14, push plate connecting rod servo motor 15, for the setting of conveyer belt 9 on rear 4 side of former, conveyer belt 9 and rear former 4 are equipped with guide rail
12, conveyer belt 9 is equipped with push plate 10, and push plate 10 is intersected in moving process with conveyer belt 9, push plate 10 and push plate connecting rod 11
Connection, push plate connecting rod 11 push push plate 10 mobile, and push plate connecting rod 11 is arranged in rear 4 side of former and is fixedly connected with rear former 4,
Conveyer belt 9 is driven by conveyer belt servo motor 14, and push plate connecting rod 11 is driven by push plate connecting rod servo motor 15.
The push plate connecting rod 11 is reciprocating push plate connecting rod.
It includes automatic control circuit that the powder, which is incremented by pressure setting, and automatic control circuit includes control chip 19, resets
Circuit 20, mode switching key circuit 22, conveyer belt one-directional rotation motor servo circuit 23, pushes away process key-press circuit for switch 21
It is double that plate connecting rod one-directionally rotates motor servo circuit 24, former hydraulic stem Double-directional rotary motor servo circuit 25, upper punch hydraulic stem
To rotation motor servo circuit 26, stripper plate hydraulic stem Double-directional rotary motor servo circuit 27, transistor switching circuit 28；
It controls the control of chip 19 and exports relevant instruction and signal, model version is not less than AT89C52；Reset circuit 20 makes
It obtains automatic control circuit and returns to state, connect with the RST pin of control chip 19；Process key-press circuit for switch 21 controls
Whether device starts to work, and is made of an auxiliary switch network, also connect with the P1.2 pin of control chip 19；Mode switching key
Circuit 22 controls the switching between high-power mode and low-power mode, is made of two auxiliary switch networks, also respectively with control core
P1.0, P1.1 pin of piece 19 connect；Conveyer belt one-directional rotation motor servo circuit 23 is connect with conveyer belt servo motor 14, is controlled
The working condition of conveyer belt servo motor 14 processed, and connect with P2.0, P2.1 pin of control chip 19；Push plate connecting rod is unidirectional
Rotation motor servo circuit 24 is connect with push plate connecting rod servo motor 15, controls the working condition of push plate connecting rod servo motor 15,
And it is connect with P2.2, P2.3 pin of control chip 19；Former hydraulic stem Double-directional rotary motor servo circuit 25 and former liquid
Compression bar servo motor 16 connect, control former hydraulic stem servo motor 16 working condition, and with control chip 19 P2.4,
The connection of P2.5 pin；Upper punch hydraulic stem Double-directional rotary motor servo circuit 26 is connect with upper punch hydraulic stem servo motor 17,
The working condition of upper punch hydraulic stem servo motor 17 is controlled, and is connect with P2.6, P2.7 pin of control chip 19；Demoulding
Plate hydraulic stem Double-directional rotary motor servo circuit 27 is connect with stripper plate hydraulic stem servo motor 18, and control stripper plate hydraulic stem is watched
The working condition of motor 18 is taken, and is connect with P1.3, P1.4 pin of control chip 19；Transistor switching circuit 28 and former
Hydraulic stem Double-directional rotary motor servo circuit 25, upper punch hydraulic stem Double-directional rotary motor servo circuit 26 are separately connected, control
The power mode output of former hydraulic stem servo motor 16 and upper punch hydraulic stem servo motor 17, and with control chip 19
The connection of P1.5 pin.
The present invention also provides a kind of method that powder is incremented by compacting, according to former and the material that uses of pressure embryo, using rubbing
Coefficient table is wiped, the friction coefficient μ at mold wall is inquired, utilizes common used material elasticity modulus (E)-Poisson's ratio (ν) table and formulaCalculate the coefficient of horizontal pressure ξ at mold wall；By measurement, pressure embryo radius r, pressure embryo length l are obtained；Most according to pressure embryo
The requirement of high-compactness, minimum consistency, average density suppresses formula using Huang training cloud, and conversion is obtained for powder part
The highest axial stress of densificationMinimum axial stressAverage axial stressAccording to powder
It is incremented by the high-power mode maximum pressing pressure corresponding with low-power mode of pressure setting divided by pressure 2 π r of embryo sectional area2, in turn
Conversion obtains the high-power mode maximum axial stress local densified for powder corresponding with low-power mode, passes through conversion
It obtains the high-power mode maximum axial stress local densified for powder corresponding with low-power mode and utilizes Huang Peiyun
The highest axial stress that compacting formula scales obtainIt compares, if highest axial stressLess than low function
The corresponding maximum axial stress of rate mode, then select low-power mode, if highest axial stressGreater than low-power mode
Corresponding maximum axial stress but be less than the corresponding maximum axial stress of high-power mode, then high-power mode is selected, if highest
Axial stressMaximum axial stress corresponding greater than high-power mode, then it is above-mentioned to be unable to satisfy compacting demand, it is necessary to change
Fill more high-power powder and be incremented by pressure setting, according to the incremental compacting relationship model of foundation, using l=n Δ l,In formula, l is pressure embryo length；Δ l is new pressurization embryo length；N is
New pressurization embryo number；I is to increase green compact compacting number newly, i=2,3 ..., n；When being suppressed for i-th, distance compacting punching
The axial stress local densified for powder at head x；Subscript a is the initial of axial, is axial mark；Subscript avg is
Average value mark；X is the distance between certain point and the compacting formed punch inside green compact；E is the natural logrithm letter in exponential function
Several truth of a matter, value are about 2.71828；μ is the coefficient of friction at mold wall；ξ is the coefficient of horizontal pressure at mold wall；R is pressure embryo
Radius；New pressurization embryo length Δ l, new pressurization embryo frequency n is calculated, and according to pressure embryo gross mass divided by new pressurization embryo number
N obtains primary increased powder quality, and new pressurization embryo frequency n is set to after control chip 19 powder that brings into operation and is incremented by compacting
Stripper plate 7 is pushed into bottom punch 6 and sealed mouth is demoulded by device, stripper plate hydraulic stem 8；Conveyer belt 9 send new pressurization embryo powder 13
Enter designated position, push plate 10 will newly be pressurized embryo powder 13 and be pushed into former and backhaul, before former hydraulic stem 5 drags former 3 make its with
Former 4 compresses afterwards, and upper punch hydraulic stem 2, which drags upper punch 1, compresses it with new pressurization embryo powder 13 into former, bottom punch 6
The new pressurization embryo powder 13 of compacting, former hydraulic stem 5 push preceding former 3 to separate it with rear former 4, and upper punch hydraulic stem 2 pushes
Upper punch 1, which leaves former, separates it with former, and filling is new again is pressurized embryo and repeats the above process, demoulding after suppressing repeatedly
Stripper plate 7 is hauled out bottom punch 6, pressure embryo demoulding by plate hydraulic stem 8.
It is incremented by compacting better than the theory analysis once suppressed:
1. mathematical model is established
Due at mold wall frictional force inhibit powder compacting, be accordingly used in the local densified axial stress of powder with
Compacting punch head surface between distance increase and reduce, then there is following relationship:
Also, embryo consistency and axial stress is pressed to be positively correlated, it may be assumed that
ρavg(x)∈σa(x)
Wherein, σa(x): the axial stress local densified for powder at distance compacting formed punch x；
Pressure embryo average density at distance compacting formed punch x；
μ: the coefficient of friction at mold wall, similarly hereinafter；
ξ: the coefficient of horizontal pressure at mold wall, similarly hereinafter；
R: pressure embryo radius, similarly hereinafter.
2. primary compacting
According to above-mentioned, when a pressed powder, as shown in Figure 1, being used for axial stressExist such as between distance x
Lower relationship:
Also,
Wherein,The axial stress local densified for powder when primary compacting, at distance compacting formed punch x；
L: pressure embryo length.
3. being incremented by compacting
Similarly, when being incremented by compacting, as shown in Fig. 2, being used for axial stressThere are following relationships between distance x:
L=n Δ l
Also,
Wherein,The axial stress local densified for powder when i-th is suppressed, at distance compacting formed punch x；
N: new pressurization embryo number；
Δ l: new pressurization embryo length；
L: pressure embryo length.
4. comparative analysis
According to pressing mode, there are following relationships:
Therefore,
5. conclusion
It is superior to once suppress in bottom end consistency and two aspect performance of average density in conclusion being incremented by pressing mode
Mode.
It is to be noted that
(1) the above-mentioned model foundation of is in ideally so that every time compacting when the axial direction local densified for powder answer
Power will not due to lateral pressure presence and lose, i.e.,But actual conditions
Under, it still will appear axial pressure changeAnd with x increase and increase, therefore, often when necessary
It is pre-sintered after the completion of secondary compacting, so that the opposite tendency toward sliding near die wall between powder particle reduces, and then is reduced axial
The pressure loss.
(2) it when carries out powder compacting every time, is realized by interface cohesion between the two with the forming of pressure embryo, therefore, correspondingly
Interface can increase appropriate binder, reduce intergranular friction, increase degree of engagement between particle, and then reduce axial compressive force damage
It loses, it is ensured that pressing process carries out, and in addition to this, if being pre-sintered after the completion of compacting every time, interface is moderately polished after sintering, really
Protect interface cohesion when suppressing again with new pressurization embryo.
(3) can optimize manufacturing process relevant to incremental compacting, that is, combine needs by the foundation of above-mentioned model
The parameters such as sample bottom end consistency and average density, the material property of sample and size, the optimal compacting number of acquisition,
Suppressing power, while selecting optimal power mode.
Beneficial effects of the present invention:
The present apparatus may be implemented powder and be incremented by compacting, and automatic control circuit is arranged and realizes electrical and its automation control
System improves production efficiency, reduces production cost, reduces manual work's intensity, and improve safety in utilization, in addition to this, leads to
Offer high-power mode and low-power mode are provided, energy consumption is reduced, improves efficiency.
Detailed description of the invention
Stress and its coordinate system schematic diagram on pressed powder pressure embryo of Fig. 1；
Fig. 2 is incremented by stress and its coordinate system schematic diagram on pressed powder pressure embryo；
Fig. 3 powder of the present invention is incremented by pressure setting structural schematic diagram；
Fig. 4 powder of the present invention is incremented by pressure setting structure elevational schematic view；
Fig. 5 powder of the present invention is incremented by the circuit diagram of pressure setting；
Process runs procedure simulation operation result schematic diagram in Fig. 6 present invention；
Mode switching program simulation run result schematic diagram in Fig. 7 present invention；
In figure, 1- upper punch, 2- upper punch hydraulic stem, former before 3-, former after 4-, 5- former hydraulic stem, 6- bottom punch,
7- stripper plate, 8- stripper plate hydraulic stem, 9- conveyer belt, 10- push plate, 11- push plate connecting rod, 12- guide rail, 13- are newly pressurized embryo powder,
14- conveyer belt servo motor, 15- push plate connecting rod servo motor, 16- former hydraulic stem servo motor, 17- upper punch hydraulic stem are watched
Taking motor, 18- stripper plate hydraulic stem servo motor, 19- controls chip, 20- reset circuit, 21- process key-press circuit for switch,
22- mode switching key circuit, 23- conveyer belt one-directionally rotate motor servo circuit, and 24- push plate connecting rod one-directionally rotates servo motor
Circuit, 25- former hydraulic stem Double-directional rotary motor servo circuit, 26- upper punch hydraulic stem Double-directional rotary motor servo circuit,
27- stripper plate hydraulic stem Double-directional rotary motor servo circuit, 28- transistor switching circuit, the output signal of 29- pin P1.3,
The output signal of 30- pin P1.4, the output signal of 31- pin P2.0, the output signal of 32- pin P2.1,33- pin P2.2
Output signal, the output signal of 34- pin P2.3, the output signal of 35- pin P2.4, the output signal of 36- pin P2.5,
Stripper plate is pushed into lower die by the output signal of 37- pin P2.6, the output signal of 38- pin P2.7,39- stripper plate hydraulic stem 8
Rush 6 processes, 40- first new pressurization embryo pressing process, 41- second new pressurization embryo pressing process, the new pressurization embryo of 42- third
Stripper plate is hauled out 6 process of bottom punch, the output signal of 44- pin P1.5 by pressing process, 43- stripper plate hydraulic stem 8, and 45- draws
The corresponding key triggering of foot P1.1, the corresponding key triggering of 46- pin P1.0, the corresponding key triggering of 47- pin P1.1,48-
The corresponding key triggering of pin P1.0.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention will be further described.
Embodiment 1
A kind of powder is incremented by pressure setting, as shown in Fig. 3,4,5, including upper punch 1, upper punch hydraulic stem 2, preceding former 3,
Afterwards former 4, former hydraulic stem 5, bottom punch 6, stripper plate 7, stripper plate hydraulic stem 8, conveyer belt 9, push plate 10, push plate connecting rod 11,
Guide rail 12, conveyer belt servo motor 14, push plate connecting rod servo motor 15, former hydraulic stem servo motor 16, upper punch hydraulic stem
Servo motor 17, stripper plate hydraulic stem servo motor 18, automatic control circuit, upper punch 1 and upper punch hydraulic stem 2 are located at external genitalia
The surface of mould 3, rear former 4, upper punch 1 are realized by the mating connection with four upper punch hydraulic stems 2 along 1 axis of upper punch
The movement in direction, and the axis of upper punch 1 is overlapped with the central axes after preceding former 3 and the closure of rear former 4, and bottom punch 6 is arranged
In preceding former 3, rear former 4 in the following, be provided with demoulding mouth on bottom punch 6, demoulds and stripper plate 7, preceding former 3 and rear former are set on mouth
Four former hydraulic stems 5 are set between 4, four former hydraulic stems 5 are symmetrical arranged two-by-two, and rear former 4, bottom punch 6 are fixed,
The movement in 3 horizontal plane direction of former before preceding former 3 is realized by four former hydraulic stems 5 engaged therewith, i.e. realization external genitalia
The folding of mould 3, rear former 4, stripper plate 7 are connect with stripper plate hydraulic stem 8, and stripper plate hydraulic stem 8 moves stripper plate 7, are realized
Conveyer belt 9 is set beside the folding of demoulding mouth, rear former 4, and conveyer belt 9 and the cooperation of push plate 10 are placed, and push plate 10 is being moved through
The intersection of in the journey and upper surface of 9 end of conveyer belt, conveyer belt 9 and rear former 4 are equipped with guide rail 12, push plate 10 and push plate connecting rod 11
Connection, push plate connecting rod 11 push push plate 10 mobile, and push plate connecting rod 11 is reciprocating push plate connecting rod, and reciprocating push plate connecting rod includes turning
Son, two connecting rods, the connecting rod being connected with rotor is shorter, and the connecting rod being connected with push plate 10 is longer, longer connecting rod, push plate 10, compared with
Short connecting rod is fixedly connected each other by shaft and realizes relative rotation, and shorter connecting rod is fixedly connected with rotor by rivet
And relatively unrotatable, rotor is connected by transmission mechanism with push plate servo motor 15, rotor center and 10 center of push plate it
Between line be overlapped with the central axes of push plate slot, push plate slot is that push plate 10 has pushed away the region that shrinks back after pressure embryo, push plate connecting rod 11
It is arranged in rear 4 side of former and is fixedly connected with rear former 4, conveyer belt 9 is driven by conveyer belt servo motor 14, push plate connecting rod 11
It being driven by push plate connecting rod servo motor 15, four upper punch hydraulic stems 2 are driven by upper punch hydraulic stem servo motor 17 simultaneously, and four
A former hydraulic stem 5 is driven by former hydraulic stem servo motor 16 simultaneously, and a stripper plate hydraulic stem 8 is watched by stripper plate hydraulic stem
Take the driving of motor 18；
Automatic control circuit is as shown in figure 5, include control chip 19, reset circuit 20, process key-press circuit for switch 21, mould
Formula switching key circuit 22, conveyer belt one-directionally rotate motor servo circuit 23, push plate connecting rod one-directionally rotates motor servo circuit 24,
Former hydraulic stem Double-directional rotary motor servo circuit 25, upper punch hydraulic stem Double-directional rotary motor servo circuit 26, stripper plate liquid
Compression bar Double-directional rotary motor servo circuit 27, transistor switching circuit 28；Reset circuit 20, process key-press circuit for switch 21, mould
Formula switching key circuit 22, conveyer belt one-directionally rotate motor servo circuit 23, push plate connecting rod one-directionally rotates motor servo circuit 24,
Former hydraulic stem Double-directional rotary motor servo circuit 25, upper punch hydraulic stem Double-directional rotary motor servo circuit 26, stripper plate liquid
Compression bar Double-directional rotary motor servo circuit 27, transistor switching circuit 28 are connect with control chip 19 respectively；
The model version for controlling chip 19 is AT89C52, and model version is not less than if using other model versions
AT89C52；
Reset circuit 20 includes a pull down resistor, a capacitor, a ground terminal pin GND, an output pin
Output, output pin Output are connected in series to the capacitor, and ground terminal pin GND connects with pull down resistor, output pin
Output and the concatermer of capacitor and ground terminal pin GND are in parallel with the concatermer of pull down resistor, and reset circuit 20 is whole and controls
The RST pin of coremaking piece 19 connects；
Process key-press circuit for switch 21, mode switching key circuit 22 respectively include a key, pull down resistor, one
A ground terminal pin GND, an input terminal pin Input, key are connected with ground terminal pin GND, pull down resistor and input terminal
Pin Input series connection, key and the concatermer of ground terminal pin GND and the concatermer of pull down resistor and input terminal pin Input
Parallel connection, process key-press circuit for switch 21 are connect with the P1.2 pin of control chip 19, mode switching key circuit 22 and control core
P1.0, P1.1 pin of piece 19 connect；
Conveyer belt one-directional rotation motor servo circuit 23, push plate connecting rod one-directional rotation motor servo circuit 24 respectively include one
A motor, two diodes, a NPN type triode, a PNP type triode, two resistance, a ground terminal pin GND,
One input terminal pin Input, motor one end are connect with a diode, a NPN type triode, a resistance, the other end
It is connect with a diode, a PNP type triode, a resistance, the collector and input terminal pin of NPN type triode
Input connection, emitter are connect with resistance, and base stage is connect with P2.0, P2.2 pin of control chip 19 respectively, three pole of positive-negative-positive
The collector of pipe is connect with ground terminal pin GND, and emitter is connect with resistance, base stage respectively with control chip 19 P2.1,
The connection of P2.3 pin, NPN type triode is in series with a resistor, the concatermer and diodes in parallel of NPN type triode and a resistance,
PNP type triode is connected with another resistance, the concatermer and diodes in parallel of PNP type triode and another resistance, transmission
It is connect with whole P2.0, P2.1 pin with control chip 19 of one-directional rotation motor servo circuit 23, push plate connecting rod one-directional rotation
Whole P2.2, P2.3 pin with control chip 19 of motor servo circuit 24 is connect；
Former hydraulic stem Double-directional rotary motor servo circuit 25, upper punch hydraulic stem Double-directional rotary motor servo circuit 26,
Stripper plate hydraulic stem Double-directional rotary motor servo circuit 27 respectively includes a motor, four diodes, two three poles of NPN type
Pipe, two PNP type triodes, four resistance, a ground terminal pin GND, an input terminal pin Input, motor one end with
The mixed connection body connection being made of two diodes, a NPN type triode, a PNP type triode, two resistance, the other end
It is connect with remaining by the mixed connection body that two diodes, a NPN type triode, a PNP type triode, two resistance are constituted,
P2.4, P2.6, P1.3 pin of the base stage of one NPN type triode and a PNP type triode respectively with control chip 19 connects
It connects, the base stage of another NPN type triode and a PNP type triode is drawn with P2.5, P2.6, the P1.4 for controlling chip 19 respectively
Foot connection, whole P2.4, P2.5 pin with control chip 19 of former hydraulic stem Double-directional rotary motor servo circuit 25 are connect, on
Whole P2.6, P2.7 pin with control chip 19 of stamping hydraulic stem Double-directional rotary motor servo circuit 26 is connect, stripper plate liquid
Whole P1.3, P1.4 pin with control chip 19 of compression bar Double-directional rotary motor servo circuit 27 is connect；
Transistor switching circuit 28 includes a NPN type triode, a capacitor, two resistance, an input terminal pin
Input, the whole P1.5 pin with control chip 19 of transistor switching circuit 28 are connect.
In addition conveyer belt one-directional rotation motor servo circuit 23 is connect with conveyer belt servo motor 14, and push plate connecting rod unidirectionally turns
Dynamic motor servo circuit 24 is connect with push plate connecting rod servo motor 15, former hydraulic stem Double-directional rotary motor servo circuit 25 and yin
Mould hydraulic stem servo motor 16 connects, upper punch hydraulic stem Double-directional rotary motor servo circuit 26 and upper punch hydraulic stem servo electricity
Machine 17 connects, and stripper plate hydraulic stem Double-directional rotary motor servo circuit 27 is connect with stripper plate hydraulic stem servo motor 18, three poles
Pipe switching circuit 28 is separately connected with former hydraulic stem servo motor 16, upper punch hydraulic stem servo motor 17.
Each section circuit concrete function is as follows:
(1) controls the control of chip 19 and exports relevant instruction and signal；
(2) reset circuit 20 makes circuit return to state:
Reset circuit 20 is connect with the RST pin of control chip 19.
(3) whether 21 control device of process key-press circuit for switch starts to work:
<1>process key-press circuit for switch 21 is connect with the P1.2 pin of control chip 19；
<2>process key-press circuit for switch 21 is made of an auxiliary switch network.
(4) mode switching key circuit 22 controls the switching between high-power mode and low-power mode:
<1>mode switching key circuit 22 is connect with P1.0, P1.1 pin of control chip 19 respectively；
<2>mode switching key circuit 22 is made of two auxiliary switch networks.
(5) conveyer belt one-directional rotation motor servo circuit 23 controls the working condition of conveyer belt servo motor 14:
<1>conveyer belt one-directional rotation motor servo circuit 23 is connect with P2.0, P2.1 pin for controlling chip 19；
<2>conveyer belt servo motor 14, which controls conveyer belt 9, will newly be pressurized embryo feeding designated position.
(6) push plate connecting rod one-directional rotation motor servo circuit 24 controls the working condition of push plate connecting rod servo motor 15:
<1>push plate connecting rod one-directional rotation motor servo circuit 24 is connect with P2.2, P2.3 pin for controlling chip 19；
<2>control of push plate connecting rod servo motor 15 push plate connecting rod 11 drives push plate 10 that will newly be pressurized embryo powder 13 and is pushed into yin
Mould and backhaul.
(7) former hydraulic stem Double-directional rotary motor servo circuit 25 controls the work feelings of former hydraulic stem servo motor 16
Condition:
<1>former hydraulic stem Double-directional rotary motor servo circuit 25 is connect with P2.4, P2.5 pin of control chip 19；
<2>if former hydraulic stem servo motor 16 rotates forward, i.e., the high level of pin P2.4 output pwm signal when
Between be greater than the high level time of pin P2.5 output pwm signal, then controlling former hydraulic stem 5 and dragging preceding former 3 makes itself and rear yin
Mould 4 compresses；
<3>if former hydraulic stem servo motor 16 rotates backward, i.e., the high level of pin P2.4 output pwm signal when
Between be less than pin P2.5 output pwm signal high level time, then control former hydraulic stem 5 and preceding former 3 pushed to make itself and rear yin
Mould 4 separates.
(8) upper punch hydraulic stem Double-directional rotary motor servo circuit 26 controls the work of upper punch hydraulic stem servo motor 17
Make situation:
<1>P2.6, P2.7 pin of upper punch hydraulic stem Double-directional rotary motor servo circuit 26 and control chip 19 connect
It connects；
<2>if upper punch hydraulic stem servo motor 17 rotates forward, i.e. the high level of pin P2.6 output pwm signal
Time is greater than the high level time of pin P2.7 output pwm signal, then controls upper punch hydraulic stem 2 and drag upper punch 1 into yin
Mould compresses it with new pressurization embryo powder 13；
<3>if upper punch hydraulic stem servo motor 17 rotates backward, i.e. the high level of pin P2.6 output pwm signal
Time is less than the high level time of pin P2.7 output pwm signal, then controls upper punch hydraulic stem 2 and upper punch 1 is pushed to leave yin
Mould separates it with former.
(9) stripper plate hydraulic stem Double-directional rotary motor servo circuit 27 controls the work of stripper plate hydraulic stem servo motor 18
Make situation:
<1>P1.3, P1.4 pin of stripper plate hydraulic stem Double-directional rotary motor servo circuit 27 and control chip 19 connect
It connects；
<2>if stripper plate hydraulic stem servo motor 18 rotates forward, i.e. the high level of pin P1.3 output pwm signal
Time is greater than the high level time of pin P1.4 output pwm signal, then controls stripper plate hydraulic stem 8 and push under the entrance of stripper plate 7
Stamping 6 will demould mouth and close；
<3>if stripper plate hydraulic stem servo motor 18 rotates backward, i.e. the high level of pin P1.3 output pwm signal
Time is less than the high level time of pin P1.4 output pwm signal, then controls the dragging stripper plate 7 of stripper plate hydraulic stem 8 and leave down
Stamping 6 will demould mouth and open.
(10) transistor switching circuit 28 controls former hydraulic stem servo motor 16 and upper punch hydraulic stem servo motor 17
Power mode output:
<1>transistor switching circuit 28 is connect with the P1.5 pin of control chip 19；
<2>if compacting sample strength is higher, that is, high-power mode is used, then former hydraulic stem servo motor 16 and upper mold
Fliud flushing compression bar servo motor 17 guarantees sample quality by output enhancing power；
<3>if compacting sample strength is lower, that is, low-power mode is used, then former hydraulic stem servo motor 16 and upper mold
Fliud flushing compression bar servo motor 17 is by outputting standard power, under the premise of guaranteeing sample quality, reduces energy consumption, improves environmental impact assessment mark
It is quasi-.
The method that powder is incremented by compacting, with copper product former, for aluminium presses embryo, is utilized according to the material of former and pressure embryo
Coefficient of friction table inquires the friction coefficient μ at mold wall, utilizes common used material elasticity modulus (E)-Poisson's ratio (ν) table and formulaCalculate the coefficient of horizontal pressure ξ at mold wall；Embryo radius r, required pressure embryo length l are pressed needed for obtaining by measurement；According to
The requirement of required pressure embryo highest consistency, minimum consistency, average density suppresses formula using Huang training cloud, and conversion is used
In the local densified highest axial stress of powderMinimum axial stressAverage axial stressThe high-power mode maximum pressing pressure corresponding with low-power mode for being incremented by pressure setting according to powder, divided by pressure
2 π r of embryo sectional area2, convert and obtain the device high-power mode maximum local densified for powder corresponding with low-power mode
Axial stress；It is accounted for compared with a drawing method in bottom end consistency and two aspect performance of average density due to being incremented by drawing method
It is excellent, and for guaranteeing to reduce energy consumption under the premise of pressing idioplasm amount, and reduce as far as possible due to be newly pressurized embryo frequency n change into
And need to add relevant code in process operation program and guarantee the considerations of realizing in terms of corresponding functional requirement, when using high
When power mode can realize corresponding requirements by being incremented by drawing method by a drawing method and using low-power mode, then
It pays the utmost attention to realize pressing process by being incremented by drawing method using low-power mode, device height will be obtained above by conversion
The power mode maximum axial stress local densified for powder corresponding with low-power mode suppresses public affairs with using yellow training cloud
The highest axial stress that formula convertsIt compares, if highest axial stressLess than low-power mode
Corresponding maximum axial stress, then select low-power mode, if highest axial stressIt is corresponding greater than low-power mode
Maximum axial stress but be less than the corresponding maximum axial stress of high-power mode, then high-power mode is selected, if highest is axially answered
PowerMaximum axial stress corresponding greater than high-power mode, then it is above-mentioned to be unable to satisfy compacting demand, it is necessary to adjustment or
Change the outfit more powerful device；According to the incremental compacting relationship model of foundation, using l=n Δ l,New pressurization embryo length Δ l, new pressurization embryo frequency n is calculated,
Primary increased powder quality is obtained divided by compacting number further according to the quality of the pressure embryo of compacting；New pressurization embryo frequency n is set
The powder that brings into operation after the fixed chip 19 to control is incremented by pressure setting, the specific steps are as follows:
(1) controls chip 19 and controls the operation of stripper plate hydraulic stem Double-directional rotary motor servo circuit 27, stripper plate hydraulic stem
Servo motor 18 drives stripper plate hydraulic stem 8 that stripper plate 7 is pushed into bottom punch 6 and seals mouth is demoulded；
(2) controls chip 19 and controls the conveyer belt one-directional rotation operation of motor servo circuit 23, and conveyer belt servo motor 14 is controlled
Conveyer belt 9 processed is run, and conveyer belt 9 will newly be pressurized embryo powder 13 and be sent into designated position, i.e. 9 end of conveyer belt；
(3) controls chip 19 and controls the one-directional rotation operation of motor servo circuit 24 of push plate connecting rod, push plate connecting rod servo motor
15 control push plate connecting rods 11 drive push plate 10 by the new pressurization embryo powder 13 push-in former of 9 end of conveyer belt and backhaul；
(4) controls chip 19 and controls the operation of former hydraulic stem Double-directional rotary motor servo circuit 25, former hydraulic stem servo
The control former hydraulic stem 5 of motor 16, which drags preceding former 3, compresses it with rear former 4；
(5) controls chip 19 and controls the operation of upper punch hydraulic stem Double-directional rotary motor servo circuit 26, upper punch hydraulic stem
Servo motor 17, which controls the dragging upper punch 1 of upper punch hydraulic stem 2, compresses it with new pressurization embryo powder 13 into former；
(6) pressing process starts, i.e., upper punch 1 suppresses new pressurization embryo powder 13, until pressing process terminates；
(7) controls chip 19 and controls the operation of former hydraulic stem Double-directional rotary motor servo circuit 25, former hydraulic stem servo
Motor 16 controls former hydraulic stem 5 and preceding former 3 is pushed to separate it with rear former 4, and control chip 19 controls upper punch hydraulic stem
Double-directional rotary motor servo circuit 26 is run, and upper punch hydraulic stem servo motor 17 controls upper punch hydraulic stem 2 and pushes upper punch 1
Leaving former separates it with former；
(8) repeats step (2)-(7) and inserts new pressurization embryo again, until compacting terminates；
(9) after compacting, control chip 19 controls stripper plate hydraulic stem Double-directional rotary motor servo circuit 27 and runs,
Stripper plate hydraulic stem servo motor 18 controls stripper plate hydraulic stem 8 and stripper plate 7 is hauled out bottom punch 6, pressure embryo demoulding.
It is to be noted that
(1) powder is incremented by pressing process commonly used in forming larger size component, therefore, in order to ensure that demoulding smoothly uses side
Face stripping means；
(2) when is incremented by pressed powder, pressure embryo once increases length and section equivalent diameter ratio is moderate, normal length and
The ratio between diameter of section is 1 ︰ 3--4 ︰ 1, so that filling process is gone on smoothly, if ratio is too small, new pressurization embryo is easy during filling
Topple over；If ratio is excessive, the opposite tendency toward sliding near die wall between powder particle increases, and influences pressing process.
Process runs program requirement: the T0/T1 by controlling chip 19 (12MHz) realizes pwm signal output；Pin P1.2
It runs whether program brings into operation by key control process by process key-press circuit for switch 21, successively carries out following steps:
(1) pin P1.3 output pwm signal, high level 8ms, low level 2ms, pin P1.4 output pin P1.3's is anti-
To pwm signal, and the above process duration is 10s, so that stripper plate hydraulic stem servo motor 18 rotates forward, is realized
Stripper plate 7 is detached from the function of bottom punch 6 by stripper plate hydraulic stem 8, i.e., such as the output signal 29 of pin P1.3, pin in Fig. 6
Shown in the output signal 30 of P1.4；
(2) pin P2.0 output pwm signal, high level 8ms, low level 2ms, pin P2.1 output pin P2.0's is anti-
To pwm signal, and the above process duration is 10s, so that conveyer belt servo motor 14 rotates, realizes that conveyer belt 9 will
New pressurization embryo powder 13 is sent into the function of designated position, the i.e. output such as the output signal 31, pin P2.1 of pin P2.0 in Fig. 6
Shown in signal 32；
(3) pin P2.2 output pwm signal, high level 8ms, low level 2ms, pin P2.3 output pin P2.2's is anti-
To pwm signal, and the above process duration is 10s, so that push plate connecting rod servo motor 15 rotates, realizes push plate connecting rod
11 drive push plate 10 that newly pressurization embryo powder 13 is sent into the preceding formers 3 and rear former 4 of separation the simultaneously function of backhaul, i.e., such as Fig. 6
Shown in the output signal 33 of middle pin P2.2, the output signal 34 of pin P2.3；
(4) pin P2.4 output pwm signal, high level 8ms, low level 2ms, pin P2.5 output pin P2.4's is anti-
To pwm signal, and the above process duration is 20s, so that former hydraulic stem servo motor 16 rotates forward, realizes yin
Mould hydraulic stem 5 drags the function that preceding former 3 is compressed with rear former 4, i.e., such as the output signal 35 of pin P2.4, pin in Fig. 6
Shown in the output signal 36 of P2.5；
(5) pin P2.6 output pwm signal, high level 8ms, low level 2ms, pin P2.7 output pin P2.6's is anti-
To pwm signal, and the above process duration is 20s, so that upper punch hydraulic stem servo motor 17 rotates forward, is realized
Upper punch hydraulic stem 2 drags the function that upper punch 1 suppresses new pressurization embryo powder 13, the i.e. output signal such as pin P2.6 in Fig. 6
37, shown in the output signal 38 of pin P2.7；
(6) pin P2.4 output pwm signal, low level 8ms, high level 2ms, pin P2.5 output pin P2.4's is anti-
To pwm signal, and the above process duration is 20s, so that former hydraulic stem servo motor 16 rotates backward, realizes yin
The function that mould hydraulic stem 5 pushes preceding former 3 isolated with rear former 4, i.e., such as the output signal 35 of pin P2.4, pin in Fig. 6
Shown in the output signal 36 of P2.5；
(7) pin P2.6 output pwm signal, low level 8ms, high level 2ms, pin P2.7 output pin P2.6's is anti-
To pwm signal, and the above process duration is 20s, so that upper punch hydraulic stem servo motor 17 rotates backward, is realized
The promotion upper punch 1 of upper punch hydraulic stem 2 leaves the preceding former 3 of the separation of separation and the function of rear former 4, i.e., such as pin in Fig. 6
Shown in the output signal 37 of P2.6, the output signal 38 of pin P2.7；
(8) pin P1.3 output pwm signal, low level 8ms, high level 2ms, pin P1.4 output pin P1.3's is anti-
To pwm signal, and the above process；Duration is 10s, so that stripper plate hydraulic stem servo motor 18 rotates backward, it is real
Stripper plate 7 is pushed into the function of bottom punch 6 by existing stripper plate hydraulic stem 8, i.e., such as the output signal 29 of pin P1.3, pin in Fig. 6
Shown in the output signal 30 of P1.4；
(9) process (1) is first carried out in, i.e., as in Fig. 6 stripper plate hydraulic stem 8 by stripper plate be pushed into 6 process of bottom punch, 39 institute
Show, then executes and cyclic process (2)-(7) are more altogether that (the present embodiment is illustrated with 3 times, and signal continuous output time is altogether
It is 320s) secondary, i.e., as newly pressurization embryo pressing process 41, third are newly-increased for first new pressurization embryo pressing process 40, second in Fig. 6
It presses shown in embryo pressing process 42, last implementation procedure (8), i.e., stripper plate is hauled out bottom punch 6 by stripper plate hydraulic stem 8 in such as Fig. 6
Shown in process 43.
Wherein, above-mentioned data setting is to process operation program for example, other data similarly use above-mentioned journey
Sequence frame, and should be noted that being initially set for the device:
(1) control P1.3, P1.4 of chip 19, P1.5, P2.0, P2.1, P2.2, P2.3, P2.4, P2.5, P2.6,
P2.7 pin initially exports low level signal；
(2) demould hydraulic stem 8 make stripper plate 7 be initially located at and bottom punch 6 demould mouth in position；
(3) push plate connecting rod 11 makes push plate 10 be initially located at backhaul apical position；
(4) upper punch hydraulic stem 2 make upper punch 1 be initially located at separation preceding former 3 and rear 4 position directly above of former；
(5) former hydraulic stem 5 makes preceding former 3 be initially located at the position isolated with rear former 4；
(6) pin P1.3 exports the pwm signal of high level 8ms, low level 2ms, and pin P1.4 output pin P1.3's is anti-
To pwm signal, so that stripper plate hydraulic stem servo motor 18 rotates forward, and pin P1.3 exports low level 8ms, high level
The pwm signal of 2ms, the reversed pwm signal of pin P1.4 output pin P1.3, so that stripper plate hydraulic stem servo motor 18 is reversed
Rotation；
(7) pin P2.4 exports the pwm signal of high level 8ms, low level 2ms, and pin P2.5 output pin P2.4's is anti-
To pwm signal, so that former hydraulic stem servo motor 16 rotates forward, and pin P2.4 exports low level 8ms, high level 2ms
Pwm signal, the reversed pwm signal of pin P2.5 output pin P2.4, so that former hydraulic stem servo motor 16 rotates backward；
(8) pin P2.6 exports the pwm signal of high level 8ms, low level 2ms, and pin P2.7 output pin P2.6's is anti-
To pwm signal, so that upper punch hydraulic stem servo motor 17 rotates forward, and pin P2.6 exports low level 8ms, high level
The pwm signal of 2ms, the reversed pwm signal of pin P2.7 output pin P2.6, so that upper punch hydraulic stem servo motor 17 is reversed
Rotation.
Mode switching program requirement: the T0/T1 by controlling chip 19 (12MHz) realizes pwm signal output；If pin
The corresponding key triggering of P1.0, then pin P1.5 persistently exports high level, until the corresponding key triggering of pin P1.1, pin
P1.5 persistently exports low level, if the corresponding key triggering of pin P1.1, pin P1.5 persistently exports low level, until pin
The corresponding key triggering of P1.0, pin P1.5 persistently exports high level, i.e., such as the output signal 44 of pin P1.5, pin in Fig. 7
The corresponding key triggering 45 of P1.1, the corresponding key triggering 46 of pin P1.0, the corresponding key of pin P1.1 trigger 47, pin
Shown in the corresponding key triggering 48 of P1.0；The corresponding key of pin P1.0 and the corresponding key of pin P1.1 do not allow to touch simultaneously
Hair.
(1) the corresponding key triggering of pin P1.0, i.e., as the corresponding key of pin P1.0 in Fig. 7 triggers 46, pin P1.0
Shown in corresponding key triggering 48, pin P1.5 exports high level signal, the NPN type triode in transistor switching circuit 28
Extracurrent is inputted former liquid by collector-emitter direction of NPN type triode by base stage on state, strengthening electric current source
Compression bar Double-directional rotary motor servo circuit 25 and upper punch hydraulic stem Double-directional rotary motor servo circuit 26 drive former hydraulic stem
Servo motor 16 and upper punch hydraulic stem servo motor 17 are in high-power mode, and export enhancing power, strong for suppressing
Higher sample is spent, and then guarantees sample quality；
(2) the corresponding key triggering of pin P1.1, i.e., as the corresponding key of pin P1.1 in Fig. 7 triggers 45, pin P1.1
Shown in corresponding key triggering 47, pin P1.5 exports low level signal, the NPN type triode in transistor switching circuit 28
Base stage is in and does not turn on state, collector-emitter direction that extracurrent can not be passed through NPN type triode by strengthening electric current source
Former hydraulic stem Double-directional rotary motor servo circuit 25 and upper punch hydraulic stem Double-directional rotary motor servo circuit 26 are inputted, so that
Former hydraulic stem servo motor 16 and upper punch hydraulic stem servo motor 17 are in low-power mode, and outputting standard power,
For the higher sample of press strengthi, and then under the premise of guaranteeing sample quality, energy consumption is reduced, improves environmental impact assessment standard.
Claims (5)
1. a kind of powder is incremented by pressure setting, which is characterized in that including upper punch (1), upper punch hydraulic stem (2), preceding former
(3), rear former (4), former hydraulic stem (5), bottom punch (6), stripper plate (7), stripper plate hydraulic stem (8), former hydraulic stem are watched
Take motor (16), upper punch hydraulic stem servo motor (17), stripper plate hydraulic stem servo motor (18), upper punch (1) and upper mold
Fliud flushing compression bar (2) is located at preceding former (3), rear former (4) top, and upper punch (1) is connect with four upper punch hydraulic stems (2), and
And the axis of upper punch (1) is overlapped with the central axes after preceding former (3) and rear former (4) closure, bottom punch (6) is arranged in external genitalia
Mould (3), rear former (4) are demoulded and stripper plate (7) are arranged on mouth in the following, be provided with demoulding mouth on bottom punch (6), preceding former (3) and after
Four former hydraulic stems (5) are set between former (4), and four former hydraulic stems (5) are symmetrical arranged two-by-two, rear former (4), lower die
Rush that (6) are fixed, and formers (3) are mobile before preceding former (3) pushes with the cooperation of four former hydraulic stems (5), stripper plate (7) and de-
Template hydraulic stem (8) connection；Four upper punch hydraulic stems (2) are driven by upper punch hydraulic stem servo motor (17) simultaneously, and four
Former hydraulic stem (5) is driven by former hydraulic stem servo motor (16) simultaneously, and stripper plate hydraulic stem (8) is watched by stripper plate hydraulic stem
Take motor (18) driving.
2. according to claim 1 powder be incremented by pressure setting, which is characterized in that further include conveyer belt (9), push plate (10),
Push plate connecting rod (11), guide rail (12), conveyer belt servo motor (14), push plate connecting rod servo motor (15), conveyer belt (9) setting exist
Afterwards beside former (4), conveyer belt (9) and rear former (4) are equipped with guide rail (12), and conveyer belt (9) is equipped with push plate (10),
Push plate (10) is connect with conveyer belt (9) intersection, push plate (10) with push plate connecting rod (11) in moving process, and push plate connecting rod (11) is set
It sets in rear former (4) side, conveyer belt (9) is driven by conveyer belt servo motor (14), and push plate connecting rod (11) is watched by push plate connecting rod
Take motor (15) driving.
3. powder is incremented by pressure setting according to claim 2, which is characterized in that the push plate connecting rod (11) is reciprocating pushes away
Plate connecting rod.
4. powder is incremented by pressure setting according to claim 3, which is characterized in that it further include automatic control circuit, it is automatic to control
Circuit processed includes control chip (19), reset circuit (20), process key-press circuit for switch (21), mode switching key circuit
(22), conveyer belt one-directional rotation motor servo circuit (23), push plate connecting rod one-directional rotation motor servo circuit (24), former are hydraulic
Bar Double-directional rotary motor servo circuit (25), upper punch hydraulic stem Double-directional rotary motor servo circuit (26), stripper plate hydraulic stem
Double-directional rotary motor servo circuit (27), transistor switching circuit (28)；Control chip (19) respectively with reset circuit (20), into
Journey key-press circuit for switch (21), mode switching key circuit (22), conveyer belt one-directional rotation motor servo circuit (23), push plate connect
Bar one-directionally rotates motor servo circuit (24), former hydraulic stem Double-directional rotary motor servo circuit (25), upper punch hydraulic stem pair
To rotation motor servo circuit (26), stripper plate hydraulic stem Double-directional rotary motor servo circuit (27), transistor switching circuit
(28) it connects；Process key-press circuit for switch (21) is made of an auxiliary switch network, and mode switching key circuit (22) is opened by two pairs
It closes network to constitute, conveyer belt one-directional rotation motor servo circuit (23) is connect with conveyer belt servo motor (14), push plate connecting rod list
It is connect to rotation motor servo circuit (24) with push plate connecting rod servo motor (15), former hydraulic stem Double-directional rotary servo motor electricity
Road (25) is connect with former hydraulic stem servo motor (16), upper punch hydraulic stem Double-directional rotary motor servo circuit (26) and upper mold
Fliud flushing compression bar servo motor (17) connection, stripper plate hydraulic stem Double-directional rotary motor servo circuit (27) are watched with stripper plate hydraulic stem
Take motor (18) connection, transistor switching circuit (28) and former hydraulic stem Double-directional rotary motor servo circuit (25), upper punch
Hydraulic stem Double-directional rotary motor servo circuit (26) is separately connected.
5. a kind of powder is incremented by drawing method, which is characterized in that using l=n Δ l,
In formula, l is pressure embryo length；Δ l is new pressurization embryo length；N is new pressurization embryo number；I is to increase green compact compacting number newly, i=2,
3,....,n；The axial stress local densified for powder when being suppressed for i-th, at distance compacting formed punch x；Under
The initial that a is axial is marked, is axial mark；Subscript avg is average value mark；X is that the certain point and compacting inside green compact rush
The distance between head；E is the truth of a matter of the natural logrithm function in exponential function, and value is about 2.71828；μ is at mold wall
Coefficient of friction；ξ is the coefficient of horizontal pressure at mold wall；R is pressure embryo radius；New pressurization embryo length Δ l, new pressurization embryo is calculated
Number n obtains primary increased powder quality divided by new pressurization embryo frequency n according to pressure embryo gross mass, will newly be pressurized the setting of embryo frequency n
The powder described in claim 1-4 any one that brings into operation after to control chip (19) is incremented by pressure setting, stripper plate hydraulic stem
(8) stripper plate (7) push-in bottom punch (6) is sealed mouth is demoulded；Conveyer belt (9) will newly be pressurized embryo powder (13) and be sent into specific bit
Set, push plate (10) will newly be pressurized embryo powder (13) push-in former and backhaul, before former hydraulic stem (5) drags former (3) make its with
Former (4) compresses afterwards, and upper punch hydraulic stem (2) dragging upper punch (1), which enters former, compresses it with new pressurization embryo powder (13),
New pressurization embryo powder (13) of bottom punch (6) compacting, former hydraulic stem (5) push preceding former (3) to separate it with rear former (4),
Upper punch hydraulic stem (2), which pushes upper punch (1) to leave former, separates it with former, and filling is new again is pressurized in embryo and repetition
Process is stated, stripper plate hydraulic stem (8) demoulds stripper plate (7) hauling-out bottom punch (6), pressure embryo after suppressing n times.
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| CN116890112B (en) * | 2023-09-08 | 2023-12-01 | 湖南三创切削工具有限公司 | Forming die and forming process for molding hard alloy bar by metal powder compression molding |
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| CN1480543A (en) * | 2002-04-17 | 2004-03-10 | �����ɷ� | Carbide alloy structural member with gradient structure |
| CN104645408A (en) * | 2015-03-09 | 2015-05-27 | 吉林大学 | Method for preparing gradient beta phase tricalcium phosphate bone substitute material |
| CN204820113U (en) * | 2015-08-01 | 2015-12-02 | 台州大叶工贸有限公司 | Plastics plasticator |
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| CN1480543A (en) * | 2002-04-17 | 2004-03-10 | �����ɷ� | Carbide alloy structural member with gradient structure |
| CN104645408A (en) * | 2015-03-09 | 2015-05-27 | 吉林大学 | Method for preparing gradient beta phase tricalcium phosphate bone substitute material |
| CN204820113U (en) * | 2015-08-01 | 2015-12-02 | 台州大叶工贸有限公司 | Plastics plasticator |
| CN206253648U (en) * | 2016-11-24 | 2017-06-16 | 上海平野磁气有限公司 | A kind of pressure setting of full-automatic magnetic powder molding press |
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