CN109996624A - Electric press casting machine and its control method - Google Patents
Electric press casting machine and its control method Download PDFInfo
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- CN109996624A CN109996624A CN201780057001.1A CN201780057001A CN109996624A CN 109996624 A CN109996624 A CN 109996624A CN 201780057001 A CN201780057001 A CN 201780057001A CN 109996624 A CN109996624 A CN 109996624A
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- electric motor
- injection
- torque
- control unit
- pressurization
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/32—Controlling equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Control Of Presses (AREA)
Abstract
The electric press casting machine and its control method of a kind of deviation of rising that can effectively inhibit boost pressure are provided.In electric press casting machine 1, when the progressive position of the injection piston 20 in high speed injection acts reaches pressurization switching position L2, execute pressurization preparatory action, i.e., the torque T of first electric motor 11 and the second electric motor 12 is limited in and is set to the torque-limiting value Tr lower than the maximum torque value Tmax of these electric motors hereinafter, injection piston 20 is made to advance.Then, when meeting torque restriction cancellation condition in being pressurized preparatory action, the limitation of the torque of the first electric motor 11 and the second electric motor 12 is released, executes the pressurizing action for pushing injection piston 20 forwards.
Description
Technical field
The present invention relates to a kind of electric press casting machine and its control methods.
Background technique
A kind of previous electric press casting machine is disclosed in patent document 1.The electric press casting machine has in injection at low velocity process
And the first injection electric motor acted and acted in high speed injection process second in pressurization process
Injection electric motor.First injection electric motor and the second injection electric motor make the thread spindle of ball screw framework
Rotation drives the injection piston being mounted on the nut body screwed togather with the thread spindle to advance.In the electric press casting machine, two electricity
Dynamic motor is controlled by different control systems.Electric press casting machine is provided with clutch mechanism, is used for driving force successfully from one
The electric motor of side is switched to the electric motor of another party.
It is contemplated that the electric press casting machine of another structure as following, different from above-mentioned electric press casting machine, with one
A control system controls one or more electric motors, in injection at low velocity process, high speed injection process and pressurization process etc.,
Pass through all one thread spindles of electrical motor driven.In the electric press casting machine of another structure, since there is no electronic horse
The switching of driving force between reaching, therefore clutch mechanism can be omitted to simplify apparatus structure.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2012-187609 bulletin
Summary of the invention
Problems to be solved by the invention
In the electric press casting machine of above-mentioned another structure, if injection piston reaches defined increase in high speed injection process
Crush-cutting change place is then switched to the pressurization process that injection piston is pushed further by electric motor.Therefore, as shown in figure 4, due to
The rotor of electric motor or inertia force, the deviation of thickness of clout cake (Biscuit) of thread spindle etc., there are the upper of boost pressure
Rising becomes precipitous to be more than target pressure value or the slow feelings to need the time to get to target pressure value of rising
Condition.There are problems that the rising of boost pressure generates deviation as a result,.
Therefore, the electronic of the deviation of the rising of boost pressure can be effectively inhibited the purpose of the present invention is to provide one kind
Die casting machine and its control method.
The means used to solve the problem
In order to achieve the above objectives, the electric press casting machine of a mode of the invention has injection piston, makes the injection column
Fill in the control unit of the driving portion moved in the longitudinal direction and the control driving portion, which is characterized in that the driving portion tool
There are the electric motor controlled by the control unit or the multiple electric motors controlled in the same manner by the control unit, the control
It is dynamic that portion processed controls the electric motor execution injection at low velocity movement, high speed injection movement and pressurizing action, the injection at low velocity
Work makes the injection piston with low-speed forward, and the high speed injection movement makes the injection piston to advance at utmost speed, the pressurization
Movement pushes the injection piston forwards, in addition, the control unit controls the electric motor, so that when in the high speed
When the progressive position of injection piston described in action of injection reaches pressurization switching position, executes and limit the torque of the electric motor
System is worth the pressurization preparatory action below of low torque-limiting value being set to the upper limit torque than the electric motor, when described
When meeting torque restriction cancellation condition in pressurization preparatory action, the limitation of the torque of the electric motor is released, the increasing is executed
Press work.
In the present invention, it is preferred to include: that the control unit controls the electronic horse in the pressurization preparatory action
It reaches, so that the injection piston is advanced with the target velocity speed below in high speed injection movement.
In the present invention, it is preferred to also have pressure detecting portion, pressure detecting portion detection is applied to the injection piston
Pressure, the torque restriction cancellation condition is that the pressure detected from the pressure detecting portion becomes being set to than increasing
It is more than the restriction cancellation pressure value for pressing target pressure value low.
In the present invention, it is preferred to also have speed detecting portion, which detects the advance of the injection piston
Speed, the torque restriction cancellation condition are that the forward speed detected from the speed detecting portion becomes being set to compare
Below the low restriction cancellation velocity amplitude of high speed injection target velocity.
In order to achieve the above objectives, the control method of the electric press casting machine of another way of the invention, the electronic die casting
Machine has the control of injection piston, the driving portion for moving the injection piston in the longitudinal direction and the control driving portion
Portion, the driving portion have the electric motor controlled by the control unit or are controlled in the same manner by the control unit multiple
The control method of electric motor, the electric press casting machine is characterised by comprising: injection at low velocity process, the control unit control
The electric motor executes injection at low velocity movement, and the injection at low velocity movement makes the injection piston with low-speed forward；High speed is infused
Process is penetrated, the control unit controls the electric motor and executes high speed injection movement, and the high speed injection movement makes the injection
Plunger is to advance at utmost speed；It is pressurized preparatory process, the control unit controls the electric motor, so that when in the high speed injection work
When the progressive position of injection piston described in sequence reaches pressurization switching position, execute the torque limit of the electric motor in quilt
It is set as being worth the pressurization preparatory action below of low torque-limiting value than the upper limit torque of the electric motor；And pressurization process,
The control unit controls the electric motor, so that when meeting torque restriction cancellation condition in the pressurization preparatory process,
The limitation of the torque of the electric motor is released, the pressurizing action for pushing the injection piston forwards is executed.
The effect of invention
According to the present invention, it when the progressive position of the injection piston in high speed injection process reaches pressurization switching position, holds
Row pressurization preparatory action, that is, the torque limit of the electric motor of driving portion is being set to the upper limit turn than the electric motor
Below the low torque-limiting value of square value.Then, it when meeting torque restriction cancellation condition in being pressurized preparatory action, releases electronic
The limitation of the torque of motor executes the pressurizing action for pushing injection piston forwards.Due in this way, by with torque-limiting value
The rising for temporarily preventing the torque of electric motor, can make electric motor maintain constant torque (torque-limiting value) always.So
Afterwards, can be in multiple pressurizing action by the limitation from the status releasing torque, the state of the torque constant from output,
The further torque of output same size every time.Therefore, the deviation of the rising of boost pressure can be effectively inhibited.As a result, can
Enough inhibit the unstable quality of molded product.
Detailed description of the invention
Fig. 1 is the figure for showing the outline structure of electric press casting machine of one embodiment of the present invention.
Fig. 2 is the coordinate diagram (boost pressure switching) of an example of the movement of the electric press casting machine of explanatory diagram 1.
Fig. 3 is the coordinate diagram (pumping rate switching) of another example of the movement of the electric press casting machine of explanatory diagram 1.
Fig. 4 is the coordinate diagram for illustrating the movement of previous electric press casting machine.
Specific embodiment
Hereinafter, referring to Fig.1~Fig. 3 illustrates the electric press casting machine of one embodiment of the present invention.
Fig. 1 is the figure for showing the outline structure of electric press casting machine of one embodiment of the present invention.As shown in Figure 1, this reality
The electric press casting machine 1 for applying mode has the first electric motor 11, the second electric motor 12, ball screw framework 13, the first power
Transmission mechanism 14, the second power transfer mechanism 15, crusherbull zone mechanism 18, direct acting body 19, injection piston 20, load cell
21, position sensor 22 and control unit 30.
First electric motor 11 and the second electric motor 12 are for example by having the electric servomotor for the structure being mutually identical
It constitutes, and the control signal by sending from aftermentioned control unit 30 controls.In first electric motor 11 and the second electric motor 12
A Fang Weizhu motor, another party is from motor.Main motor is followed from motor, identical direction is revolved to each other with identical speed
Turn.That is, the first electric motor 11 and the second electric motor 12 are carried out each other by being controlled in the same manner by a control system
Identical movement.In addition, in the present embodiment, for the structure with 2 electric motors, but not limited to this.For example,
It can be the structure with 1 electric motor, or for the electronic of 3 or more controlled in the same manner by 1 control system
The structure of motor.
Ball screw framework 13 has thread spindle 13a and nut body 13b, and nut body 13b is through not shown ball
It is screwed togather with thread spindle 13a.It in ball screw framework 13, is pivoted by thread spindle 13a, makes nut body 13b in screw thread
It moves linearly in the axial direction of axis 13a.
First power transfer mechanism 14 includes first pulley 14a, is coaxially disposed with thread spindle 13a；Band-like same of non junction
Step band 14b, is set up in the output pulley 11a of first pulley 14a and the first electric motor 11.First power transfer mechanism 14 will
The rotation output of first electric motor 11 is transferred to thread spindle 13a, so that thread spindle 13a be made to be pivoted.
Second power transfer mechanism 15 is also in the same manner as the first power transfer mechanism, comprising: the second belt wheel 15a, with screw thread
Axis 13a coaxial arrangement；The band-like synchronous belt 15b of non junction, is set up in the output of the second belt wheel 15a and the second electric motor 12
Belt wheel 12a.The rotation output of second electric motor 12 is transferred to thread spindle 13a by the second power transfer mechanism 15, to make spiral shell
Line axis 13a is pivoted.
By the first power transfer mechanism 14 and the second power transfer mechanism 15, keep the first electric motor 11 and second electronic
The rotation output of motor 12 is directly delivered to thread spindle 13a.
First electric motor 11, the second electric motor 12, ball screw framework 13, the first power transfer mechanism 14 and
Two power transfer mechanisms 15 constitute the driving portion for moving injection piston 20 in a forward direction.
Crusherbull zone mechanism 18 has first component 18a, second component 18b and elastic component 18c.First component 18a
And second component 18b is formed as cyclic annular.First component 18a is fixably attached to being interspersed with the state of nut body 13b in inside
Nut body 13b.Second component 18b is to be interspersed with nut body 13b in inside and clip elastic component between first component 18a
The state of 18c is linked by the coupling members such as bolt (not shown) and first component 18a.Second component 18b is not secured to nut
Body 13b.
Elastic component 18c is equal or slightly larger than (for example, 1.05 times~1.1 times) and cuts from high speed injection process to be applied
It is changed to the state of the compressing force of melting material pressure when being pressurized process, is configured between first component 18a and second component 18b.By
This can apply required injection to metal melt under the non-shrinking state of elastic component 18c in high speed injection process
Pressure.In addition, elastic component 18c is shunk, when moment applying big pressure so as to inhibit device to damage because of big pressure
It is bad etc..
Before there is direct acting body 19 inside to be interspersed with the cylindric main part 19a of thread spindle 13a, closing main part 19a
The wall portion 19b of end side end and be set to main part 19a rear end side end flange part 19c.Flange part 19c fixedly pacifies
Second component 18b loaded on crusherbull zone mechanism 18.
Injection piston 20 is formed as cylindric, and one end is fixably attached to the front end of direct acting body 19.Injection piston 20 via
Direct acting body 19 and crusherbull zone mechanism 18 are installed on nut body 13b, move linearly together with nut body 13b.
Load cell 21 detects the pressure for being applied to thread spindle 13a, and sends control for the signal for indicating the pressure
Portion 30.
Position sensor 22 is for example made of linear encoder, the position of detection direct acting body 19 in the longitudinal direction, and will
Indicate that the signal of the position of the direct acting body 19 is sent to control unit 30.
Control unit 30 has the microcomputer of embedded device, and the microcomputer of the embedded device for example has
There are CPU, ROM, RAM, EEPROM, various I/O interfaces etc..Control unit 30 is responsible for the control of entire electric press casting machine 1.Control unit 30
On die closing process, injection at low velocity process, high speed injection process, pressurization preparatory process, pressurization process, die sinking process and product top
Out in each process such as process, above-mentioned first electric motor 11, the second electric motor 12 and die sinking (not shown) and die closing are controlled
With the movement of each driving device such as brake or product ejection brake.
Control unit 30 is connect with the first electric motor 11 and the second electric motor 12, and will be with starting, stopping and rotation
The related control signal of speed is sent to these electric motors.
Control unit 30 is connect with load cell 21, is applied to injection column based on the signal detection from load cell 21
The pressure P (injection pressure) of plug 20.Pressure detecting portion is constituted by load cell 21 and control unit 30.Control unit 30 and position
Sensor 22 connects, and based on the signal from position sensor 22, detects the forward-reverse position L and speed of injection piston 20
V.Position detection part and speed detecting portion are constituted by position sensor 22 and control unit 30.
Control unit 30 is using the pressure P and forward-reverse position L and speed V of the injection piston 20 detected to the first electricity
Dynamic motor 11 and the second electric motor 12 carry out feedback control (PID control).In addition, control unit 30 is electronic based on being sent to first
The torque of control signal detection the first electric motor 11 and the second electric motor 12 of motor 11 and the second electric motor 12.
Then, an example of the control method of the electric press casting machine 1 of above-mentioned present embodiment is illustrated referring to Fig. 2, Fig. 3.
Electric press casting machine 1 is controlled as executing injection at low velocity process and high speed injection process and pressurization process, wherein this is low
Fast injection process and high speed injection process by coming in front of making injection piston 20 by the type chamber of metal melt injection fillers to mold,
Stuffing pressure of the pressurization process by higher thrust push injection plunger 20 to improve metal melt.In addition, electronic die casting
Machine 1 is controlled as between high speed injection process and pressurization process, executes the first electric motor 11 of limitation and the second electric motor
The pressurization preparatory process of 12 torque.
Electric press casting machine 1 sets the first electric motor in injection at low velocity process, high speed injection process and pressurization process
11 and second the maximum torque value Tmax (i.e. upper limit torque value) that allows in electric motor 12 be torque upper limit value Ts.It is quasi- in pressurization
In standby process, set maximum torque value Tmax multiplied by torque-limiting value Tr obtained by factor alpha (0≤α < 1, such as α=0.5) as
Torque upper limit value Ts.In the present embodiment, use the permitted maximum torque value Tmax of each electric motor as upper limit torque
Value, but in addition to that, maximum torque value Tmax also can be used multiplied by defined factor beta (0≤β < 1, such as β=0.9) and
The value obtained is as upper limit torque value.
(boost pressure switching)
Fig. 2 is to release first based on the pressure P (injection pressure) for being applied to injection piston 20 in pressurization preparatory process
The figure that the structure of the torque limit of electric motor 11 and the second electric motor 12 is illustrated.
As shown in Fig. 2, acting in injection at low velocity process as injection at low velocity, control unit 30 starts the first electric motor
11 and second electric motor 12 spinning movement.Control unit 30 gradually increase the speed of injection piston 20 after with constant low speed
Injection target velocity VL (such as 0.1m/ seconds) makes the advance movement of injection piston 20.Then, when the progressive position of injection piston 20 arrives
Up to it is defined switch at high speed position L1 when, switch to high speed injection process.
It in high speed injection process, is acted as high speed injection, control unit 30 increases the first electric motor 11 and the second electricity
With constant high speed injection target velocity VH after speed rapid increase of the rotation speed of dynamic motor 12 to make injection piston 20
(such as 2m/ seconds) make the advance movement of injection piston 20.Then, pressurization switching as defined in being reached when the progressive position of injection piston 20
When the L2 of position, switch to be pressurized preparatory process.
In pressurization preparatory process, as pressurization preparatory action, the control of control unit 30 first electric motor 11 and the second electricity
Dynamic motor 12 makes injection piston 20 with defined setting speed (high speed injection target velocity VH or fast lower than the high speed injection target
The speed of VH is spent, speed may be 0 (advancing with inertia force)) movement of advancing.Also, control unit 30 is by the first electric motor
11 and second electric motor 12 torque upper limit value Ts from the maximum torque value Tmax of each electric motor be changed to than the maximum turn
Square value Tmax low torque-limiting value Tr (Tr=Tmax × α), thus the first electric motor 11 of limitation and the second electric motor 12
Torque rise.Factor alpha ranges preferably from 0.3≤α≤0.7, and in the present embodiment, factor alpha is set as 0.5.
In pressurization preparatory process, filling of the metal melt to mold cavity is substantially completed, thus the speed of injection piston 20
Degree V sharply declines, but control unit 30 keeps the first electric motor 11 and the second electric motor 12 dynamic to maintain setting speed
Make.Therefore, the torque of the first electric motor 11 and the second electric motor 12 rises, be applied to the pressure P of injection piston 20 with
The rising of torque and rise.At this point, the torque T of the first electric motor 11 and the second electric motor 12 is limited in as torque upper limit
Value Ts and the torque-limiting value Tr or less set.
Then, it is set to when the pressure P for being applied to injection piston 20 in pressurization preparatory process rises and reaches than pressurization
The restriction cancellation pressure value P k (such as 25MPa) of target pressure value Pm (such as 50MPa) small value (meets torque restriction cancellation
Condition) when, control unit 30 becomes torque upper limit value Ts again maximum torque value Tmax from torque-limiting value Tr.First is released as a result,
The limitation of the torque of electric motor 11 and the second electric motor 12, goes to pressurization process.
In pressurization process, control unit 30 controls the first electric motor 11 and the second electric motor 12 is applied to injection column
The pressure P of plug becomes being pressurized target pressure value Pm.Control unit 30 makes the first electric motor 11 and the second electric motor 12 as a result,
Torque T is further up from torque upper limit value Ts.The pressure P for being applied to injection piston 20 rises with it pressurization target pressure value
Pm, and pressurization target pressure value Pm is kept into for the stipulated time.Then, control unit 30 releases the push-in of injection piston 20, opens mould
Have and ejects molded product.
(pumping rate switching)
Fig. 3 is in pressurization preparatory process, and the speed V based on injection piston 20 releases the first electric motor 11 and second
The figure that the structure of the torque limit of electric motor 12 is illustrated.
The structure phase switched due to injection at low velocity process, high speed injection process and pressurization process with above-mentioned boost pressure
Together, and the description is omitted.
In pressurization preparatory process, as pressurization preparatory action, the control of control unit 30 first electric motor 11 and the second electricity
Dynamic motor 12 makes injection piston 20 with defined setting speed, and (high speed injection target velocity VH is lower than the high speed injection target
The speed of speed VH, speed may be movement of 0) advancing.Also, control unit 30 is by the first electric motor 11 and the second electronic horse
Torque upper limit value Ts up to 12 is changed to be lower than the limit of maximum torque value Tmax from the maximum torque value Tmax of each electric motor
Torque value Tr (Tr=Tmax × α) processed, so that the torque of the first electric motor 11 of limitation and the second electric motor 12 rises.Coefficient
α's ranges preferably from 0.3≤α≤0.7, and in the present embodiment, factor alpha is set as 0.5.
In pressurization preparatory process, filling of the metal melt to mold cavity is substantially completed, thus the speed of injection piston 20
Degree V sharply declines, but control unit 30 keeps the first electric motor 11 and the second electric motor 12 dynamic to maintain setting speed
Make.Therefore, the torque of the first electric motor 11 and the second electric motor 12 rises, be applied to the pressure P of injection piston 20 with
The rising of torque and rise.At this point, the torque T of the first electric motor 11 and the second electric motor 12 is limited in as torque upper limit
Value Ts and the torque-limiting value Tr or less set.
Then, it is set to when the speed V of injection piston 20 in pressurization preparatory process is reduced and reached than high speed injection mesh
When marking the restriction cancellation velocity amplitude Vk (such as 0.5m/ seconds) (meeting torque restriction cancellation condition) of the small value of speed VH, control
Portion 30 becomes torque upper limit value Ts again maximum torque value Tmax from torque-limiting value Tr.Release as a result, the first electric motor 11 and
The limitation of the torque of second electric motor 12, goes to pressurization process.
As described above, electric press casting machine 1 according to the present embodiment, when injecting column in high speed injection acts
When the progressive position of plug 20 reaches pressurization switching position L2, pressurization preparatory action is executed, that is, by the first electric motor 11 and second
The torque T of electric motor 12, which is limited in, is set to the torque-limiting value Tr lower than the maximum torque value Tmax of these electric motors
Below.Then, when meeting torque restriction cancellation condition in pressurization preparatory action, (the pressure P for being applied to injection piston 20 becomes
The speed V of restriction cancellation pressure value P k or injection piston 20 becomes restriction cancellation velocity amplitude Vk) when, release the first electronic horse
Up to 11 and second electric motor 12 torque limitation, execute the pressurizing action that pushes injection piston 20 forwards.Due to this
Sample can by temporarily preventing the rising of the torque T of the first electric motor 11 and the second electric motor 12 with torque-limiting value Tr
The first electric motor 11 and the second electric motor 12 is set to maintain constant torque always.Also, by from status releasing torque T
Limitation, can be in multiple pressurizing action, from the state for exporting constant torque T, further output same size every time
Torque T.Therefore, the deviation of the rising of boost pressure can be effectively inhibited.Thereby, it is possible to inhibit the quality of molded product unstable
It is fixed.
In the above-described embodiment, torque restriction cancellation condition is to be applied to the pressure P of injection piston 20 to become limiting
The speed V of pressure relief value Pk (boost pressure switching) or injection piston 20 becomes restriction cancellation velocity amplitude Vk (pumping rate
Switching), but not limited to this.In addition to this, as torque restriction cancellation condition, for example, can also be from injection piston 20
Reach the defined torque restriction cancellation time (for example, 0.1 by the time from when progressive position reaches pressurization switching position L2
Second).In this way, the deviation of the rising of boost pressure can be effectively inhibited with simpler structure.
It this concludes the description of embodiments of the present invention, but the present invention is not restricted to these example.Those skilled in the art couple
Above-mentioned embodiment is suitably additional, delete constituent element, is designed change is formed by embodiment, or to embodiment party
The technical characteristic of formula carries out embodiment that is appropriately combined and being formed and is included in the present invention as long as meeting spirit of the invention
In the range of.
Description of symbols
1 ... electric press casting machine, 11 ... first electric motors, 11a ... output pulley, 12 ... second electric motors, 12a ... are defeated
Pulley, 13 ... ball screw frameworks, 13a ... thread spindle, 13b ... nut body, 14 ... first power transfer mechanisms, 14a ...
One belt wheel, 14b ... synchronous belt, 15 ... second power transfer mechanisms, the second belt wheel of 15a ..., 15b ... synchronous belt, 18 ... collisions are slow
Punch mechanism, 18a ... first component, 18b ... second component, 18c ... elastic component, 19 ... direct acting bodies, 19a ... main part, 19b ...
Wall portion, 19c ... flange part, 20 ... injection pistons, 21 ... load cells, 22 ... position sensors, 30 ... control units, L1 ... are high
Fast switching position, L2 ... are pressurized switching position, P ... pressure, T ... torque, Ts ... torque upper limit value, Tmax ... maximum torque value
(upper limit torque value), Tr ... torque-limiting value, Pk ... restriction cancellation pressure value, Pm ... pressurization target pressure value, V ... speed are (preceding
Into speed), VH ... high speed injection target velocity, VL ... injection at low velocity target velocity, Vk ... restriction cancellation velocity amplitude.
Claims (5)
1. a kind of electric press casting machine, with injection piston, the driving portion for moving the injection piston in the longitudinal direction and
Control the control unit of the driving portion, which is characterized in that
The driving portion has the electric motor controlled by the control unit or is controlled in the same manner by the control unit more
A electric motor,
The control unit controls the electric motor and executes injection at low velocity movement, high speed injection movement and pressurizing action, described
Injection at low velocity movement makes the injection piston with low-speed forward, the high speed injection movement make the injection piston with high speed before
Into, the pressurizing action pushes the injection piston forwards,
In addition, the control unit controls the electric motor, so that when the injection piston described in high speed injection movement
When progressive position reaches pressurization switching position, the torque limit of the electric motor is being set to than the electric motor by execution
Upper limit torque be worth the pressurization preparatory action below of low torque-limiting value, when meet in the pressurization preparatory action torque limit
When condition subsequent processed, the limitation of the torque of the electric motor is released, executes the pressurizing action.
2. electric press casting machine according to claim 1, which is characterized in that
It include: that the control unit controls the electric motor in the pressurization preparatory action, so that the injection piston is with institute
The target velocity speed below stated in high speed injection movement is advanced.
3. electric press casting machine according to claim 1 or 2, which is characterized in that
Also there is pressure detecting portion, which detects the pressure for being applied to the injection piston,
The torque restriction cancellation condition is that the pressure detected from the pressure detecting portion becomes being set to than pressurization
It is more than the low restriction cancellation pressure value of target pressure value.
4. electric press casting machine according to claim 1 or 2, which is characterized in that
Also there is speed detecting portion, which detects the forward speed of the injection piston,
The torque restriction cancellation condition is that the forward speed detected from the speed detecting portion becomes being set to compare
Below the low restriction cancellation velocity amplitude of high speed injection target velocity.
5. a kind of control method of electric press casting machine, the electric press casting machine has injection piston, makes the injection piston preceding
The control unit of driving portion and the control driving portion that rear moves up, the driving portion has to be controlled by the control unit
An electric motor or multiple electric motors for being controlled in the same manner by the control unit,
The control method of the electric press casting machine is characterised by comprising:
Injection at low velocity process, the control unit control the electric motor and execute injection at low velocity movement, the injection at low velocity movement
Make the injection piston with low-speed forward；
High speed injection process, the control unit control the electric motor and execute high speed injection movement, the high speed injection movement
Make the injection piston to advance at utmost speed；
It is pressurized preparatory process, the control unit controls the electric motor, so that when infusing described in the high speed injection process
When penetrating the progressive position arrival pressurization switching position of plunger, the torque limit of the electric motor is being set to than this by execution
The upper limit torque of electric motor is worth the pressurization preparatory action below of low torque-limiting value；And
It is pressurized process, the control unit controls the electric motor, so that when meeting torque limit in the pressurization preparatory process
When condition subsequent processed, the limitation of the torque of the electric motor is released, executes the pressurization for pushing the injection piston forwards
Movement.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-215127 | 2016-11-02 | ||
| JP2016215127A JP6772032B2 (en) | 2016-11-02 | 2016-11-02 | Electric die casting machine and its control method |
| PCT/JP2017/039466 WO2018084163A1 (en) | 2016-11-02 | 2017-11-01 | Electric die cast machine and method for controlling same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109996624A true CN109996624A (en) | 2019-07-09 |
| CN109996624B CN109996624B (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780057001.1A Active CN109996624B (en) | 2016-11-02 | 2017-11-01 | Electric die casting machine and control method thereof |
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| Country | Link |
|---|---|
| JP (1) | JP6772032B2 (en) |
| CN (1) | CN109996624B (en) |
| WO (1) | WO2018084163A1 (en) |
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| JP6850230B2 (en) * | 2017-09-19 | 2021-03-31 | 芝浦機械株式会社 | Injection device and die casting machine |
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|---|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4891739B2 (en) * | 2006-11-22 | 2012-03-07 | 東洋機械金属株式会社 | Die casting machine |
| JP5514423B2 (en) * | 2008-09-25 | 2014-06-04 | 東洋機械金属株式会社 | Molding machine |
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- 2017-11-01 CN CN201780057001.1A patent/CN109996624B/en active Active
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| EP0216940A1 (en) * | 1985-04-08 | 1987-04-08 | Fanuc Ltd. | Device for controlling injection pressure of injection molding machine |
| US4851170A (en) * | 1985-04-12 | 1989-07-25 | Nissei Plastics Industrial Co., Ltd. | Injection control method of injection molding machine |
| JPH06246801A (en) * | 1993-02-25 | 1994-09-06 | Toyo Mach & Metal Co Ltd | Injection control method for injection molding machine |
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| JP2008142758A (en) * | 2006-12-12 | 2008-06-26 | Toyo Mach & Metal Co Ltd | Die casting machine |
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Also Published As
| Publication number | Publication date |
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| JP6772032B2 (en) | 2020-10-21 |
| CN109996624B (en) | 2021-04-27 |
| WO2018084163A1 (en) | 2018-05-11 |
| JP2018069316A (en) | 2018-05-10 |
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