CN113814372B - Vacuum die-casting control method, system and equipment - Google Patents
Vacuum die-casting control method, system and equipment Download PDFInfo
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- CN113814372B CN113814372B CN202111202055.7A CN202111202055A CN113814372B CN 113814372 B CN113814372 B CN 113814372B CN 202111202055 A CN202111202055 A CN 202111202055A CN 113814372 B CN113814372 B CN 113814372B
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- casting
- electric cylinder
- die casting
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- vacuum die
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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
- B22D17/2015—Means for forcing the molten metal into the die
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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
- B22D17/14—Machines with evacuated die cavity
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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
Abstract
The invention belongs to the technical field of technical machining which is basically free of cutting, and particularly relates to a vacuum die-casting control method, a vacuum die-casting control system and vacuum die-casting control equipment, wherein the vacuum die-casting control method comprises the following steps: setting parameters of vacuum die casting; and the electric cylinder during die casting is controlled according to the parameters of vacuum die casting, so that the thrust of the electric cylinder in the die casting machine is accurately controlled, and feeding and die casting are completed in a short time.
Description
Technical Field
The invention belongs to the technical field of machining technology which is basically free of cutting, and particularly relates to a vacuum die-casting control method, system and equipment.
Background
The die casting process is to push the metal solid material in the quartz tube into a die through a push rod after the metal solid material is melted, perform die casting and then cool and form. In the prior art, in the process of pushing a material into a die after melting, in order to control good pushing force, the pushing speed of a push rod is set slowly, the die-casting pushing process is long, and when the die-casting force does not reach an actual set value, a part of the material is solidified and formed, so that the whole die-casting quality is influenced.
Therefore, it is necessary to design a new vacuum die casting control method, system and apparatus based on the above technical problems.
Disclosure of Invention
The invention aims to provide a vacuum die-casting control method, a vacuum die-casting control system and vacuum die-casting control equipment.
In order to solve the technical problem, the invention provides a vacuum die-casting control method, which comprises the following steps:
setting parameters of vacuum die casting; and
and controlling the electric cylinder during die casting according to the parameters of vacuum die casting.
Further, the method for setting the parameters of vacuum die casting comprises the following steps:
setting the die-casting thrust S of the push rod during die-casting, and setting the movement speed v of the push rod during die-casting Speed measuring device Setting the internal volume V of the die cavity during die casting 1 Volume V for holding quartz tube material 2 (ii) a An initial bit P0; a switching position P1; a die-casting position P2; a die orifice P3;
the distance from P3 to P2 is L3, L3= (V2-V1)/a;
wherein A is the cross-sectional area of the inner diameter of the quartz tube.
Further, the method for setting the parameters of vacuum die casting further comprises:
total stroke L = L of push rod 1 +L 2 ；
Wherein L is the total stroke of the push rod and is the distance from an initial position P0 to a die-casting position P2; l is 1 A distance from an initial position P0 to a switching position P1 for a push rod speed mode stroke; l is 2 Switching the distance from a position P1 to a die-casting position P2 for the push rod torque mode stroke;
setting the running speed ratio of the electric cylinder to be i; the lead of the lead screw is P.
Further, the method for setting the parameters of vacuum die casting further comprises:
L 1 the stroke is quickly operated to a designated position through the speed mode of the electric cylinder:
electric cylinder operating speed:
run time t = L 1 /v Speed-up device ；
Electric cylinder thrust:
wherein n is the rotating speed of the motor, P is the lead of the lead screw, and eta is the transmission efficiency;
L 2 the stroke is controlled through servo drive PID current regulation to keep the push rod die-casting thrust at S.
Further, the method for setting the parameters of vacuum die casting further comprises:
the electric cylinder controls the rotation angle through the torque, and determines the torque of the electric cylinder at the moment through PID current regulation:
wherein T is motor torque; t is a unit of load Is the load torque; j is load inertia;
make it possible to
Equal to 0, the output torque of the electric cylinder motor is equal to the load torque.
Further, the method for controlling the electric cylinder during die casting according to the parameters of vacuum die casting comprises the following steps:
and controlling the electric cylinder according to the running speed of the electric cylinder, the thrust of the electric cylinder and the torque of a motor in the electric cylinder so as to perform vacuum die casting.
In a second aspect, the present invention further provides a control system using the vacuum die casting control method, including:
the setting module is used for setting parameters of vacuum die casting; and
and the execution module is used for controlling the electric cylinder during die casting according to the parameters of the vacuum die casting.
In a third aspect, the present invention also provides a die casting apparatus that employs the above vacuum die casting control method, including:
the electric cylinder is controlled by the control module;
the control module is suitable for controlling the electric cylinder according to the parameters of vacuum die casting so as to carry out die casting.
The invention has the beneficial effects that the vacuum die casting parameters are set; and the electric cylinder during die-casting is controlled according to the parameters of vacuum die-casting, so that the thrust of the electric cylinder in a die-casting machine is accurately controlled, and feeding and die-casting are completed in a short time.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a vacuum die casting control method according to the present invention;
FIG. 2 is a schematic view of a mold and an electric cylinder according to the present invention;
FIG. 3 is a functional block diagram of the control system of the present invention;
fig. 4 is a schematic block diagram of the die-casting apparatus of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 to 4, the present embodiment 1 provides a vacuum die casting control method including: setting parameters of vacuum die casting; and the electric cylinder (servo electric cylinder) during die-casting is controlled according to the parameters of vacuum die-casting, so that the thrust of the electric cylinder in the die-casting machine is accurately controlled, and feeding and die-casting are completed in a short time.
In this embodiment, the method for setting the parameters of vacuum die casting includes: setting push rod pushing speed V Speed measuring device (ii) a Setting the push rod die-casting thrust S to be stabilized at 200 +/-10 Kg; setting the inner volume V of the die cavity during die casting 1 Volume V of the setting material 2 ，V 1 ≤V 2 (ii) a An initial position P0 (determined by the heating coil position); switching position P1 (from P1 to torque control mode, ending at die casting position P2, the shorter the distance, the better to reduce the push rod operation time, the timeThe method is dependent on a control process, namely, the servo motor is automatically switched from a speed mode to a torque mode, the torque is output according to the set thrust, the output torque is corrected according to a push rod pressure feedback value PID to reach the shortest distance L2 required by a stable set value, and the distance process empirical value is 5-20mm. ) (ii) a A die-casting position P2 (the position is a final stop position of the servo push rod, and the servo push rod keeps constant pressure according to a set pressure value and lasts for a set duration of the process); a die opening P3, which is a die opening, wherein a distance L3 from P3 to P2 needs to be kept constant when different metal pieces are die-cast, and the distance from P3 to P2 is L3 when different metal pieces are die-cast, wherein L3= (V2-V1)/a; wherein A is the cross-sectional area of the inner diameter of the quartz tube.
In this embodiment, the method for setting parameters of vacuum die casting further includes: total stroke of push rod L = L 1 +L 2 (ii) a Wherein, L is the total stroke of the push rod, the distance from an initial position P0 to a die-casting position P2, and the total distance of the servo push rod speed mode and the torque mode; l is 1 For the stroke of the speed mode of the push rod, the distance from the initial position P0 to the switching position P1, in the process, a servo motor of the electric cylinder operates in the speed mode and quickly advances according to the set linear speed, so that the staying time of the molten metal in the quartz tube is reduced; l is 2 Switching the distance from the position P1 to the die-casting position P2 for the push rod torque mode stroke; setting the running speed ratio of the electric cylinder to be i; the lead of the lead screw is P; in this embodiment, specific examples are as follows: the total stroke L =150mm of the push rod during die casting, and the process data are as follows: l is a radical of an alcohol 2 ＝5mm，L 1 ＝L-L 2 =145mm; the electric cylinder operation speed ratio i = 1.2; lead screw lead P =32mm.
In this embodiment, the method for setting the parameters of vacuum die casting further includes: l is a radical of an alcohol 1 The stroke is quickly operated to a specified position through the speed mode of the electric cylinder: electric cylinder operating speed:
mm/s; run time t = L 1 /v Speed-up device (ii) a Electric cylinder thrust:
wherein n is the rotating speed of the motor, P is the lead of the lead screw, and eta is the transmission efficiency; l is a radical of an alcohol 2 The stroke is controlled through servo drive PID current regulation to enable the push rod die-casting thrust to be maintained at S.
In this embodiment, the method for setting the parameters of vacuum die casting further includes: the electric cylinder controls the rotation angle through the torque, and determines the torque of the electric cylinder at the moment through PID current regulation:
from the form of newton's second law in rotational motion:
wherein T is motor torque; t is load Is the load torque; j is load inertia; make it
Equal to 0, the output torque of the electric cylinder motor is the same as the load torque, and when the equation is 0, the whole system is in a steady state, namely the output torque of the motor is the same as the load torque, the rotating speed of the system is constant, the acceleration of the rotating speed is 0, and the system is in steady operation. At this time, L 1 Travel time: t is t 1 ＝L 1 /v Speed measuring device =145/888.9=0.163s; l run time: t ≈ L/v Speed measuring device And the speed is 150/888.9 and the speed is 0.169s, the feeding can be realized within 0.5s, the die casting can be started, and the thrust of the die casting machine can be accurately controlled.
In this embodiment, the method for controlling an electric cylinder during die casting according to the parameters of vacuum die casting includes: and controlling the electric cylinder according to the running speed of the electric cylinder, the thrust of the electric cylinder and the torque of a motor in the electric cylinder so as to perform vacuum die casting.
Example 2
In addition to embodiment 1, the present embodiment 2 provides a control system using the vacuum die casting control method in embodiment 1, including: the setting module is used for setting parameters of vacuum die casting; and the execution module is used for controlling the electric cylinder during die casting according to the parameters of the vacuum die casting.
In this embodiment, specific functions of each module have been described in detail in embodiment 1, and are not described in detail in this embodiment.
Example 3
On the basis of embodiment 1, the present embodiment 3 also provides a die-casting apparatus that employs the vacuum die-casting control method in embodiment 1, including: the electric cylinder is controlled by the control module; the control module is suitable for controlling the electric cylinder according to the parameters of vacuum die casting so as to carry out die casting.
In the present embodiment, the control module is adapted to control the electric cylinder by using the vacuum die casting control method in embodiment 1.
In conclusion, the vacuum die casting method has the advantages that the parameters of vacuum die casting are set; and the electric cylinder during die-casting is controlled according to the parameters of vacuum die-casting, so that the thrust of the electric cylinder in a die-casting machine is accurately controlled, and feeding and die-casting are completed in a short time.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A vacuum die-casting control method, characterized by being applied to a die-casting apparatus comprising:
a mold, the interior of which is provided with a cavity;
one end of the quartz tube is communicated with the cavity of the mould, and the other end of the quartz tube is used for inserting the push rod;
the electric cylinder is used for driving the push rod to push the material in the quartz tube into the cavity of the mold; wherein
An initial position P0, a switching position P1 and a die-casting position P2 are arranged along the advancing direction of the push rod;
the vacuum die-casting control method comprises the following steps:
setting parameters of vacuum die casting; and
controlling an electric cylinder during die casting according to the parameters of vacuum die casting;
the method for setting the parameters of vacuum die casting comprises the following steps:
setting the die-casting thrust S of the push rod during die-casting, and setting the movement speed v of the push rod during die-casting Speed measuring device Setting the inner volume V of the die cavity during die casting 1 Volume of material placed V 2 (ii) a An initial bit P0; switching position P1; a die-casting position P2; a die orifice P3;
the distance from P3 to P2 is L3, L3= (V2-V1)/a;
wherein A is the cross-sectional area of the inner diameter of the quartz tube.
2. The vacuum die casting control method according to claim 1,
the method for setting the parameters of vacuum die casting further comprises the following steps:
total stroke of push rod L = L 1 +L 2 ；
Wherein L is the total stroke of the push rod and is the distance from an initial position P0 to a die-casting position P2; l is 1 The distance from the initial position P0 to the switching position P1 for the push rod speed mode stroke; l is a radical of an alcohol 2 Switching the distance from the position P1 to the die-casting position P2 for the push rod torque mode stroke;
setting the running speed ratio of the electric cylinder to be i; the lead of the lead screw is P.
3. The vacuum die casting control method according to claim 2,
the method for setting the parameters of vacuum die casting further comprises the following steps:
L 1 the stroke is quickly operated to a designated position through the speed mode of the electric cylinder:
electric cylinder operating speed:
run time t = L 1 /v Speed-up device ；
Electric cylinder thrust:
wherein T is motor torque; n is the motor rotating speed, P is the lead screw lead, and eta is the transmission efficiency;
L 2 the stroke is controlled through servo drive PID current regulation to enable the push rod die-casting thrust to be maintained at S.
4. A vacuum die casting control method according to claim 3,
the method for setting the parameters of vacuum die casting further comprises the following steps:
the electric cylinder controls the rotation angle through the torque, and determines the torque of the electric cylinder at the moment through PID current regulation:
wherein T is motor torque; t is a unit of load Is the load torque; j is load inertia;
make it
Equal to 0, the output torque of the electric cylinder motor is equal to the load torque.
5. The vacuum die casting control method according to claim 4,
the method for controlling the electric cylinder during die casting according to the parameters of vacuum die casting comprises the following steps:
and controlling the electric cylinder according to the running speed of the electric cylinder, the thrust of the electric cylinder and the torque of a motor in the electric cylinder so as to perform vacuum die casting.
6. A control system using the vacuum die casting control method according to any one of claims 1 to 5, comprising:
the setting module is used for setting parameters of vacuum die casting; and
and the execution module is used for controlling the electric cylinder during die casting according to the parameters of the vacuum die casting.
7. A die casting apparatus using the vacuum die casting control method according to any one of claims 1 to 5, comprising:
the control module and the electric cylinder controlled by the control module;
the control module is suitable for controlling the electric cylinder according to the parameters of vacuum die casting so as to carry out die casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111202055.7A CN113814372B (en) | 2021-10-15 | 2021-10-15 | Vacuum die-casting control method, system and equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111202055.7A CN113814372B (en) | 2021-10-15 | 2021-10-15 | Vacuum die-casting control method, system and equipment |
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| CN113814372A CN113814372A (en) | 2021-12-21 |
| CN113814372B true CN113814372B (en) | 2022-12-06 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2368548A (en) * | 2000-10-30 | 2002-05-08 | Golden Tech | Die-casting |
| DE10144945B4 (en) * | 2001-09-12 | 2005-05-04 | Alcan Bdw Gmbh & Co. Kg | A method of controlling a vacuum valve of a vacuum die casting apparatus and vacuum die casting apparatus |
| JP2007190584A (en) * | 2006-01-18 | 2007-08-02 | Toyota Motor Corp | Vacuum die casting method and apparatus thereof |
| CN101954470A (en) * | 2010-11-01 | 2011-01-26 | 东莞宜安电器制品有限公司 | Vacuum die-casting system of die-casting machine |
| DE102012200568A1 (en) * | 2012-01-16 | 2013-07-18 | Oskar Frech Gmbh + Co. Kg | Control device for casting piston feed movement |
| CN103586437B (en) * | 2013-11-26 | 2016-04-06 | 美诺精密压铸(上海)有限公司 | Die casting and comprise its die-casting system |
| CN112122584B (en) * | 2020-08-31 | 2022-03-15 | 武汉华中数控股份有限公司 | Pressure casting automated production control system based on PLC |
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