CN1271480C - Linear friction welder control method and single-chip machine controller - Google Patents
Linear friction welder control method and single-chip machine controller Download PDFInfo
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- CN1271480C CN1271480C CN 200410025915 CN200410025915A CN1271480C CN 1271480 C CN1271480 C CN 1271480C CN 200410025915 CN200410025915 CN 200410025915 CN 200410025915 A CN200410025915 A CN 200410025915A CN 1271480 C CN1271480 C CN 1271480C
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Abstract
The present invention discloses a control method for a linear friction welder and a controller for a signal chip machine of a linear friction welder. The controller for a signal chip machine is composed of a signal chip machine circuit, a power peak sampling circuit, etc.; thereby, the automatic control of the processes of motor start, stop, brake, weldment friction, welding positioning, etc. in the linear friction welding process can be realized; the linear friction welder can be controlled in a time mode and a power peak mode. In a power peak control process, the single chip machine samples for a current of a motor for many times through a current mutual inductor; the power peak and the peak time are obtained after software processing; the single chip machine utilizes the peak time as a starting point for delaying and stabilizing the friction welding time. Because a power peak control mode is insensitive to the initial state of a welding surface, the weldments achieve the stable welding quality in a batch production process. The time control method and the power peak control method are adopted; thereby, the requirements of various linear friction welding technologies are satisfied, and the control precision is high.
Description
Technical field
The present invention relates to a kind of microchip controller of linear friction welder, also relate to the control method of this microchip controller of linear friction welder.
Background technology
The linear friction welding is a complicated system engineering, and the vibration processes of linear friction welding machine is rotated by ac adjustable speed motor drive bent axle and realizes; Friction pressure and upsetting pressure are realized by two diaphragm cylinders of two electronics Air Valve Control respectively; The spacing motion by spacing cylinder promotion tooth bar and position limited gear of weldment realizes.
The startup of ac adjustable speed motor, stop with rotational frequency by Frequency Converter Control, it starts, stops directly to use the start button AN on the frequency converter panel
1, stop button AN
2Motor rotation frequency is set on the panel of frequency converter in advance.Three electronics air valve DF of control friction pressure cylinder, upsetting pressure cylinder and spacing cylinder
1, DF
2And DF
3Respectively by three single-pole switch K
a, K
b, K
cConnect+12V control; The electromechanics brake gear is by single-pole switch K
dControl.
Operation steps is such: according to welding process requirement, set earlier motor rotation frequency on frequency converter---press electric motor starting button AN
1Starter motor---closed immediately single-pole switch Ka opens friction pressure cylinder electronics air valve DF
1, the action of friction pressure cylinder, this moment, two weldments were made mutual fricting movement under friction pressure---behind the friction certain hour, press stop button AN
2---and quick-make single-pole switch K
d, starter motor mechanical braking device---closed immediately single-pole switch Kc, spacing cylinder action makes the weldment location---closed immediately single-pole switch K behind the weldment location
b, the upsetting pressure cylinder moves and applies forging force to weldment---behind the pressurize certain hour, open single-pole switch K in turn
b, K
a, K
dAnd K
cFinish welding.
The shortcoming that prior art exists is as follows:
Can only realize simple time control welding manner, because weld interval is very short, according to different welding technologys, be generally several seconds～tens seconds, be difficult to change electric machine frequency at the welding initial stage and realize the slow liter of motor speed, the change of electric machine frequency also is difficult to realize in welding process, thereby can not satisfy the welding process requirement of some weldment;
Motor stall, brake, welding location, upsetting plurality of processes require to finish in turn in moment, and welding precision is difficult to guarantee, also may cause welding unsuccessful sometimes;
The whole process of welding has strict demand to the sequence of operation of each switch, and misoperation may cause device damage;
Welding condition is difficult to accurate adjusting, and welding efficiency is low, thereby can not be used for industrialized mass production.
Summary of the invention
In order to overcome the shortcoming of prior art, the invention provides a kind of microchip controller of linear friction welder, the control method of this microchip controller of linear friction welder also is provided.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of microchip controller of linear friction welder, it is characterized in that: comprise single-chip microcomputer, analog to digital conversion circuit, D/A converting circuit, latch, frequency dividing circuit, the expansion input port, the expansion delivery outlet, power peak sample circuit and linear light buffer circuit, the power peak sample circuit is gathered the three-phase current signal of drive motor through linear optically coupled isolation circuit, be input to single-chip microcomputer after converting digital signal to by analog to digital conversion circuit, the voltage signal of single-chip microcomputer output is input to the frequency control port of frequency converter by D/A converting circuit, frequency dividing circuit converts the pulse signal of Chip Microcomputer A LE end to frequency lower pulse signal and offers analog to digital converter in the D/A converting circuit, analog to digital converter in the analog to digital conversion circuit, address wire is electrically connected with the data bus of single-chip microcomputer by latch in the sheet of expansion input port and expansion delivery outlet, input parameter signal, the welding enabling signal, the control mode switching signal, be input to single-chip microcomputer near switching signal and limit switch signal by the expansion input port, program process shows signal and peak value shows signal are from the expansion delivery outlet output of single-chip microcomputer, the motor stop signal, the electric motor starting signal, the friction pressure air cylinder signal, the pressure cylinder signal is forged in rammer, the motor brake signal, spacing air cylinder signal is exported by single-chip microcomputer respectively, after isolation is amplified through isolating amplifier circuit, connect corresponding executive circuit.
Described power peak sample circuit, form by current transformer, three phase full wave rectification bridge ZD, filter capacitor C and potentiometer W, one end of a plurality of current mutual inductor coils interconnects, the other end of a plurality of current mutual inductor coils inserts the input end of three phase full wave rectification bridge ZD respectively, be connected on the output terminal of three phase full wave rectification bridge ZD after filter capacitor C and the potentiometer W parallel connection, the negative pole of output end of three phase full wave rectification bridge ZD and the armature contact of potentiometer W are electrically connected with the linear light buffer circuit.
A kind of control method for linear friction welder that adopts above-mentioned microchip controller of linear friction welder may further comprise the steps:
1. start detects the welding enabling signal, is high level, begins welding;
2. single-chip microcomputer sends electric motor starting signal 60, starts three phase alternating current motor;
3. single-chip microcomputer sends friction pressure air cylinder signal 61, starting friction pressure cylinder valve events, add friction pressure for the weldment of fricting movement, friction pressure promotes rapidly, starts the timer 0 trigger fraction time t of single-chip microcomputer inside when opening the friction pressure cylinder valve
f
Or the startup modulus conversion chip, carry out the three phase alternating current motor power samples; Single-chip microcomputer sends friction pressure air cylinder signal 61, and starting friction pressure cylinder valve events adds friction pressure for the weldment of fricting movement, and friction pressure promotes rapidly; Continuously the three-phase alternating current acc power is sampled, timer 0 trigger that starts single-chip microcomputer inside when reaching the friction horsepower peak value is stablized fraction time t
w
4. after timer 0 was delayed time, the single-chip microcomputer response was interrupted and is carried out corresponding interrupt service subroutine, promptly sends motor stop signal 59 and makes the motor stall to frequency converter; Send motor brake signal 64; Start timer 1 trigger of single-chip microcomputer inside.
5. after timer 1 was delayed time, single-chip microcomputer response interrupted also carrying out corresponding interrupt service subroutine, i.e. scanning is near on off state, when scanning when being closure signal near switch, send and start spacing air cylinder signal 63, start spacing cylinder and move;
6. stop means makes weldment accurately can collide the position-limit mechanism limit switch behind the location, the single-chip microcomputer scanning is to after the limit switch closure signal, send upsetting pressure cylinder signal 62, start the action of upsetting pressure cylinder and apply forging force, retention time t is forged in the timer 2 triggers rammer that starts single-chip microcomputer inside simultaneously
u
7. after timer 2 is delayed time, single-chip microcomputer response interruption is also carried out corresponding interrupt service subroutine, promptly successively friction pressure air cylinder signal 61 and rammer are forged 62 negates of pressure cylinder signal, close friction pressure cylinder electronics air valve and rammer and forge the pressure cylinder air valve, to discharge the weldment pressure.
8. after, single-chip microcomputer cuts out spacing cylinder air valve with spacing air cylinder signal 63 negates, to remove spacing hold down gag, makes it to set back, and welding finishes.
The present invention's advantage compared to existing technology is: owing to adopted singlechip controller, can realize the automatic control of linear friction welding process, and the control accuracy height, welding quality is good, the production efficiency height;
Time control mode and power peak control mode have been adopted, can satisfy various linear friction welding technological requirements, because power peak control mode is insensitive to the original state of face of weld, thereby make weldment when producing in batches, reach stable welding quality.
Technological parameter input single-chip microcomputer, motor stall, brake, welding location, upsetting process are finished in turn by program setting, can guarantee bonding accuracy.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is linear friction welding process and control mode curve map.
Fig. 3 is output relay circuit figure.
Fig. 4 is a linear friction bonding control method process flow diagram.
Among the figure: P
f-friction pressure, P
u-upsetting force, the v-linear velocity that rubs, N-power, M
Max-power peak, t
Fz-rotating speed increases progressively the time, t
f-fraction time, t
w-stablize fraction time, t
q-brake the time, t
u-upset and forge the time.
Embodiment
With reference to Fig. 1.Microchip controller of linear friction welder is made up of single-chip microcomputer, analog to digital conversion circuit, D/A converting circuit, latch, frequency dividing circuit, expansion input port, expansion delivery outlet, power peak sample circuit and linear light buffer circuit.The power peak sample circuit is electrically connected with single-chip microcomputer through analog-digital converter circuit by the linear light buffer circuit, single-chip microcomputer is electrically connected with frequency converter by D/A converting circuit, frequency dividing circuit is electrically connected with single-chip microcomputer and D/A converting circuit respectively, latch respectively with single-chip microcomputer, analog-digital converter circuit, expansion input port and expansion delivery outlet are electrically connected, the parameter input, welding starts, the control mode switch, be electrically connected with single-chip microcomputer by the expansion input port near switch and limit switch, program process shows and peak value shows that passing through the expansion delivery outlet is electrically connected with single-chip microcomputer, and single-chip microcomputer is directly controlled the friction pressure cylinder, pressure cylinder is forged in rammer, spacing cylinder, the startup of motor brake and motor and stopping.
Because the output power N of motor is directly proportional with current of electric, therefore, the peak point of electric current is the peak point of friction horsepower.The power peak sample circuit is by current transformer (L
1, L
2, L
3), three phase full wave rectification bridge ZD, filter capacitor C and potentiometer W form.Current transformer (L
1, L
2, L
3) three-phase current signal of output drive motor, behind three phase full wave rectification bridge ZD, filter capacitor C rectifying and wave-filtering, from the V of the armature contact of the potentiometer W analog to digital conversion circuit of input control system expansion behind linear optically coupled isolation circuit
iInput end is repeatedly sampled, and obtains power peak and peak value after handling through scm software constantly, and single-chip microcomputer is a starting point with this peak value constantly, and time-delay is stablized the friction welding time.
D/A converting circuit, its V
oExportable 0～10V the voltage of output terminal, this voltage signal is the frequency control port of input converter again, can realize the real-time control to electric machine frequency.When welding technology need rub that frequency is slow to be increased, single-chip microcomputer only needed get final product to the digital quantity that D/A converting circuit writes corresponding frequencies with certain incremental change and regular hour step-length slow increasing in the time period; And when the frequency conversion friction welding, in the different time periods, the digital quantity that writes corresponding frequencies to D/A converting circuit gets final product.
Three timers of single-chip microcomputer inside can be realized the time-delay of each time parameter.
Because address wire is used single-chip microcomputer P0 mouth jointly in the data bus of single-chip computer control system and the sheet of SCM peripheral chip, need to come the P0 mouth is latched with latch.
The clock signal of analog to digital converter is taken from the ALE end of single-chip microcomputer, and when the single-chip microcomputer external clock was 12M, the pulsed frequency of ALE end was 12/6MHZ.And the clock signal of analog to digital converter input threshold limit value is lower, so use frequency dividing circuit that the time clock of Chip Microcomputer A LE end is carried out frequency division.
Single-chip microcomputer is selected the 89C52 single-chip microcomputer for use, carry three timers in the sheet, 256 byte RAM and the erasable flashROM of 8K, analog to digital conversion circuit is selected the ADC0809 analog to digital converter for use, D/A converting circuit is selected the AD7524 digital to analog converter for use, latch is selected the 74L373 address latch for use, frequency dividing circuit carries out 5 frequency divisions with the 74LS90 counter to the time clock of Chip Microcomputer A LE end, with the 400KHZ clock frequency that obtains CLK clock signal as analog to digital converter ADC0809, expand two 8255 programmable parallel I/O chips, a slice (8255I) is used for parameter and signal input as the expansion input port, and a slice (8255O) is used for the program indication as the expansion delivery outlet, peak value shows output.
With reference to Fig. 1 and Fig. 3.Motor stop signal 59, electric motor starting signal 60, starting friction pressure cylinder signal 61, startup are upset and are forged pressure cylinder signal 62, starter motor brake signal 63, the spacing air cylinder signal 64 of startup, P1.5, P1.4, P1.3, P1.2, P1.1, the P1.0 by 89C52 single-chip microcomputer P1 mouth exports respectively.Output signal is passed through isolating amplifier circuit D again
6, D
7, D
8, D
9, D
10, D
11After isolating amplification, drive relay J respectively
0～J
5Corresponding executive circuit is connected in action.
Digital to analog converter AD7524, its output terminal V
oExportable 0～10V voltage, this voltage signal is the control port of input converter again, can realize controlling electric machine frequency.
With reference to Fig. 2.When employing time control mode, the time parameter that welding is set mainly contains: t
FzSlow time, the t of increasing of-frequency
f-fraction time (forming), t by three sections
q-brake time t
u-upset and forge the time etc.Control system software is controlled each program behavior with these several time sequencings successively.If in the time of will skipping any one or two section in the slow increasing process of frequency, the normal friction process, only need the slow time t that increases of frequency
FzAnd fraction time t
fIn one or two period will skipping be made as 0 and get final product.
When adopting power peak control mode, the time parameter that welding is set mainly contains: t
FzSlow time, the t of increasing of-frequency
w-stablize fraction time, t
q-brake time, t
u-upset and forge the time etc.If welding technology need not frequency be delayed increasing process, only need the slow time t that increases of frequency
FzBeing made as 0 gets final product.
With reference to Fig. 4.Free control mode of the control mode of linear friction welding process and power peak control mode.
Time can be carried out frequency conversion rate linear friction welding during control mode, realize the linear friction welding technology of various materials, but the time control mode is that parameter is controlled whole welding process with fraction time, brake time, upsetting dwell time merely just.
Power peak control is in the process of friction welding, when arriving friction horsepower peak point (N
Max) after, the control mode that fraction time is carried out friction welding is stablized in time-delay again.Adopt the purpose of this control mode to be, because after arriving power peak point, the oxide of frictional interface is cleared up substantially, lip-deep microcosmic injustice is polished, and interface and both sides have been set up than the even temperature field.In the case, certain fraction time of delaying time again helps obtaining the welding joint of high-quality.For identical weldment, because its initial surface state is variant, just may when welding, arrive the asynchronism(-nization) of power peak, but when peak point, its surface state is very close, and the moment of power peak is obtained automatically by the single-chip computer control system sampling, Gu rise constantly at power peak, the identical stable fraction time of delaying time just can reach identical welding quality.
Time control mode and power peak control mode can realize all that frequency is slow and increase, when the weldment surface have more obvious when uneven, too much such as oxide, should not directly carry out the normal frequency friction welding, can take the slow friction process that increases of frequency.
Control procedure is as follows:
The controller electrification reset after the hardware initialization, reads in parameters, as t
Fz-frequency is delayed the time, t of increasing
f-fraction time, f
w-stablize fraction time, t
q-brake the time, t
u-upset and forge the time, parameter is carried out corresponding conversion, storage.
The control mode switch is a high level, then carries out power peak control mode, otherwise the execution time control mode.
The time control mode:
1, detects the welding enabling signal, be high level, begin welding;
2, single-chip microcomputer sends electric motor starting signal 60, and starter motor rotates;
3, single-chip microcomputer sends friction pressure air cylinder signal 61, starting friction pressure cylinder valve events, add friction pressure for the weldment of fricting movement, friction pressure promotes rapidly, starts the timer 0 trigger fraction time t of single-chip microcomputer inside when opening the friction pressure cylinder valve
f
4, after timer 0 was delayed time, the single-chip microcomputer response was interrupted and is carried out corresponding interrupt service subroutine, promptly sends motor stop signal 59 and makes the motor stall to frequency converter; Send motor brake signal 64; Start timer 1 trigger of single-chip microcomputer inside.
5, after timer 1 was delayed time, single-chip microcomputer response interrupted also carrying out corresponding interrupt service subroutine, i.e. scanning is near on off state, when scanning when being closure signal near switch, send and start spacing air cylinder signal 63, start spacing cylinder and move;
6, stop means makes weldment accurately can collide the position-limit mechanism limit switch behind the location, the single-chip microcomputer scanning is to after the limit switch closure signal, send upsetting pressure cylinder signal 62, start the action of upsetting pressure cylinder and apply forging force, retention time t is forged in the timer 2 triggers rammer that starts single-chip microcomputer inside simultaneously
u
7, after timer 2 is delayed time, single-chip microcomputer response interruption is also carried out corresponding interrupt service subroutine, promptly successively friction pressure air cylinder signal 61 and rammer are forged 62 negates of pressure cylinder signal, close friction pressure cylinder electronics air valve and rammer and forge the pressure cylinder air valve, to discharge the weldment pressure.
8, afterwards, single-chip microcomputer cuts out spacing cylinder air valve with spacing air cylinder signal 63 negates, to remove spacing hold down gag, makes it to set back, and welding finishes.
Power peak control mode:
1, detect the welding enabling signal, the control mode switch is a high level, begins welding;
2, single-chip microcomputer sends electric motor starting signal 60, and starter motor rotates;
3, start modulus conversion chip, carry out the three phase alternating current motor power samples;
4, single-chip microcomputer sends friction pressure air cylinder signal 61, and starting friction pressure cylinder valve events adds friction pressure for the weldment of fricting movement, and friction pressure promotes rapidly;
5, continuously the three-phase alternating current acc power is sampled, timer 0 trigger that starts single-chip microcomputer inside when reaching the friction horsepower peak value is stablized fraction time t
w
6, after timer 0 was delayed time, the single-chip microcomputer response was interrupted and is carried out corresponding interrupt service subroutine, promptly sends motor stop signal 59 and makes the motor stall; Send motor brake signal 64; Start timer 1 trigger of single-chip microcomputer inside.
7, after timer 1 was delayed time, single-chip microcomputer response interrupted also carrying out corresponding interrupt service subroutine, i.e. scanning is near on off state, when scanning when being closure signal near switch, send and start spacing air cylinder signal 63, start spacing cylinder and move;
8, stop means makes weldment accurately can collide the position-limit mechanism limit switch behind the location, the single-chip microcomputer scanning is to after the limit switch closure signal, send upsetting pressure cylinder signal 62, start the action of upsetting pressure cylinder and apply forging force, retention time t is forged in the timer 2 triggers rammer that starts single-chip microcomputer inside simultaneously
u
9, after timer 2 is delayed time, single-chip microcomputer response interruption is also carried out corresponding interrupt service subroutine, promptly successively friction pressure air cylinder signal 61 and rammer are forged 62 negates of pressure cylinder signal, close friction pressure cylinder electronics air valve and rammer and forge the pressure cylinder air valve, to discharge the weldment pressure.
10, afterwards, single-chip microcomputer cuts out spacing cylinder air valve with spacing air cylinder signal 63 negates, to remove spacing hold down gag, makes it to set back, and welding finishes.
According to the requirement of welding technology, also can be when time control mode or power control mode, set that electric machine frequency is slow to increase the time period.During welding, program is carried out earlier this process, electric machine frequency by 0 or certain smaller value be incremented to the normal welding frequency of setting.The incremental change of frequency is realized that by the software computing system carries out digital-to-analog conversion with the frequency values that changes by digital to analog converter AD7524, and the frequency control terminal that outputs to frequency converter changes electric machine frequency.
This outer controller also can be realized the frequency conversion welding, to adapt to different technological requirements.Be with the fraction time t in the time control mode
fBe divided into three sections t
F1, t
F2And t
F3Input is respectively set corresponding electric machine frequency from the input/output port of expansion.During friction welding, in the different time periods, control system is carried out digital-to-analog conversion with the frequency of setting by digital to analog converter AD7524, and the frequency control terminal that outputs to frequency converter changes electric machine frequency.When welding technology does not need frequency conversion, only need t
F2And t
F3Be made as 0, program is just only at t
F1Skip t after the welding of fill order's frequency in time
F2And t
F3Time period.
Claims (3)
1, a kind of microchip controller of linear friction welder, it is characterized in that: comprise single-chip microcomputer, analog to digital conversion circuit, D/A converting circuit, latch, frequency dividing circuit, the expansion input port, the expansion delivery outlet, power peak sample circuit and linear light buffer circuit, the power peak sample circuit is gathered the three-phase current signal of drive motor through linear optically coupled isolation circuit, be input to single-chip microcomputer after converting digital signal to by analog to digital conversion circuit, the voltage signal of single-chip microcomputer output is input to the frequency control port of frequency converter by D/A converting circuit, frequency dividing circuit converts the pulse signal of Chip Microcomputer A LE end to frequency lower pulse signal and offers analog to digital converter in the analog to digital conversion circuit, analog to digital converter in the analog to digital conversion circuit, address wire is electrically connected with the data bus of single-chip microcomputer by latch in the sheet of expansion input port and expansion delivery outlet, input parameter signal, the welding enabling signal, the control mode switching signal, be input to single-chip microcomputer near switching signal and limit switch signal by the expansion input port, program process shows signal and peak value shows signal are from the expansion delivery outlet output of single-chip microcomputer, the motor stop signal, the electric motor starting signal, the friction pressure air cylinder signal, the pressure cylinder signal is forged in rammer, the motor brake signal, spacing air cylinder signal is exported by single-chip microcomputer respectively, after isolation is amplified through isolating amplifier circuit, connect corresponding executive circuit.
2, microchip controller of linear friction welder according to claim 1, it is characterized in that: described power peak sample circuit, by current transformer, three phase full wave rectification bridge ZD, filter capacitor C and potentiometer W form, one end of a plurality of current mutual inductor coils interconnects, the other end of a plurality of current mutual inductor coils inserts the input end of three phase full wave rectification bridge ZD respectively, be connected on the output terminal of three phase full wave rectification bridge ZD after filter capacitor C and the potentiometer W parallel connection, the negative pole of output end of three phase full wave rectification bridge ZD and the armature contact of potentiometer W are electrically connected with the linear light buffer circuit.
3, a kind of control method for linear friction welder that adopts the microchip controller of linear friction welder of claim 1 may further comprise the steps:
1. start detects the welding enabling signal, is high level, begins welding;
2. single-chip microcomputer sends electric motor starting signal (60), starts three phase alternating current motor;
3. single-chip microcomputer sends friction pressure air cylinder signal (61), starting friction pressure cylinder valve events, add friction pressure for the weldment of fricting movement, friction pressure promotes rapidly, starts the timer 0 trigger fraction time t of single-chip microcomputer inside when opening the friction pressure cylinder valve
f
Or the startup modulus conversion chip, carry out the three phase alternating current motor power samples; Single-chip microcomputer sends friction pressure air cylinder signal (61), and starting friction pressure cylinder valve events adds friction pressure for the weldment of fricting movement, and friction pressure promotes rapidly; Continuously the three-phase alternating current acc power is sampled, timer 0 trigger that starts single-chip microcomputer inside when reaching the friction horsepower peak value is stablized fraction time t
w
4. after timer 0 was delayed time, the single-chip microcomputer response was interrupted and is carried out corresponding interrupt service subroutine, promptly sends motor stop signal (59) and makes the motor stall to frequency converter; Send motor brake signal (64); Start timer 1 trigger of single-chip microcomputer inside.
5. after timer 1 was delayed time, single-chip microcomputer response interrupted also carrying out corresponding interrupt service subroutine, i.e. scanning is near on off state, when scanning when being closure signal near switch, send and start spacing air cylinder signal (63), start spacing cylinder and move;
6. stop means makes weldment accurately can collide the position-limit mechanism limit switch behind the location, the single-chip microcomputer scanning is to after the limit switch closure signal, send upsetting pressure cylinder signal (62), start the action of upsetting pressure cylinder and apply forging force, retention time t is forged in the timer 2 triggers rammer that starts single-chip microcomputer inside simultaneously
u
7. after timer 2 is delayed time, single-chip microcomputer response interruption is also carried out corresponding interrupt service subroutine, promptly successively friction pressure air cylinder signal (61) and rammer are forged pressure cylinder signal (62) negate, close friction pressure cylinder electronics air valve and rammer and forge the pressure cylinder air valve, to discharge the weldment pressure.
8. after, single-chip microcomputer cuts out spacing cylinder air valve with spacing air cylinder signal (63) negate, to remove spacing hold down gag, makes it to set back, and welding finishes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410025915 CN1271480C (en) | 2004-03-05 | 2004-03-05 | Linear friction welder control method and single-chip machine controller |
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|---|---|---|---|
| CN 200410025915 CN1271480C (en) | 2004-03-05 | 2004-03-05 | Linear friction welder control method and single-chip machine controller |
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| CN1271480C true CN1271480C (en) | 2006-08-23 |
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| CN100463758C (en) * | 2006-12-29 | 2009-02-25 | 西北工业大学 | Friction pressure loading unit of linear friction welding machine and loading method thereof |
| JP6554029B2 (en) * | 2015-11-24 | 2019-07-31 | 川崎重工業株式会社 | Friction stir spot welding device and friction stir spot welding method |
| CN110572033B (en) * | 2019-09-29 | 2021-05-14 | 郭世杰 | Direct current driving method for vibration friction welding machine |
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