CN215824227U - Ejection control system of die casting machine - Google Patents
Ejection control system of die casting machine Download PDFInfo
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- CN215824227U CN215824227U CN202122009735.9U CN202122009735U CN215824227U CN 215824227 U CN215824227 U CN 215824227U CN 202122009735 U CN202122009735 U CN 202122009735U CN 215824227 U CN215824227 U CN 215824227U
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- thimble
- programmable controller
- flow valve
- die casting
- casting machine
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Abstract
The utility model provides a die casting machine ejection control system, includes ejecting device, drive mechanism, programmable controller, displacement sensor and pressure flow valve, and programmable controller is connected with displacement sensor, pressure flow valve respectively, and programmable controller passes through drive mechanism and is connected with ejecting device, and pressure flow valve sets up on drive mechanism, and programmable controller controls pressure flow valve's aperture and then controls ejecting device's speed and dynamics through drive mechanism. The ejection control system of the die casting machine adopts the displacement sensor to detect the displacement information of the corresponding parts on the equipment, so as to obtain the displacement information of the thimble, and the programmable controller controls the speed and the force of the thimble according to the displacement information of the thimble, so that the thimble is stable and smooth in action and very stable and accurate in starting and stopping actions in the process of ejecting the thimble in front and at the back, thereby reducing the impact strength of the thimble and ensuring the action efficiency of the thimble.
Description
Technical Field
The utility model relates to the technical field of automatic control of die casting machines, in particular to an ejection control system of a die casting machine.
Background
The die casting machine directly presses the metal liquid and jets into the mould, makes the metal liquid cool off fashioned equipment under the high pressure environment in the mould, and in full-automatic production process, a manipulator snatchs the shaping product automatically, requires that thimble stroke control is accurate, good reproducibility, impact are little.
In the process of front-top and back-top movement of a die-casting machine top in the prior art, the movement of the ejector pin is suddenly started and stopped, so that the impact on the action is large, the repeatability error of the stop position is large, the mechanical arm fails to grab a product, even damages the product, the automatic cycle production is damaged, the production efficiency and the stability and the service life of equipment are seriously influenced, and even potential safety hazards exist.
Therefore, further improvements are needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an intelligent ejection control system of a die casting machine, which has the advantages of simple and reasonable structure, small impact, accurate stroke control, good repeatability and strong practicability, and overcomes the defects in the prior art.
According to the ejecting control system of die casting machine of this purpose design, including ejecting device and drive mechanism, its characterized in that: the automatic ejection device comprises a programmable controller, a pressure flow valve, a transmission mechanism, a pressure flow valve, a displacement sensor, a pressure flow valve, a push-out device and a push-out device, and is characterized by further comprising the programmable controller, the displacement sensor and the pressure flow valve, wherein the programmable controller is respectively connected with the displacement sensor and the pressure flow valve, the programmable controller is connected with the push-out device through the transmission mechanism, the pressure flow valve is arranged on the transmission mechanism, and the programmable controller controls the opening degree of the pressure flow valve so as to control the speed and the force of the push-out device through the transmission mechanism.
The transmission mechanism comprises an oil pump, a thimble oil cylinder and a thimble connecting rod, the ejection device at least comprises a thimble, the programmable controller is connected with the oil pump, the oil pump is connected with the thimble oil cylinder, and the thimble oil cylinder is connected with the thimble through the thimble connecting rod.
The oil pump is connected with the thimble oil cylinder through an oil pipe, and the pressure flow valve is arranged on the oil pipe and comprises a proportional pressure valve and a proportional flow valve.
The thimble oil cylinder comprises a cylinder body and a piston rod, one end of the thimble connecting rod is connected with the piston rod, and the other end of the thimble connecting rod is connected with a middle plate of a die casting machine.
The die casting machine comprises a die locking oil cylinder, a tail plate, a machine hinge mechanism, a movable template and a fixed template, wherein the die locking oil cylinder is connected with the tail plate, the tail plate is connected with the movable template through the machine hinge mechanism, the movable template is arranged between the tail plate and the fixed template, and the thimble oil cylinder is arranged on the movable template.
The control method of the ejection control system of the die casting machine comprises the following steps:
A. after the die casting machine is started, the displacement sensor detects displacement information and samples and sends the detected displacement information to the programmable controller;
B. the programmable controller acquires sampling information sent by the displacement sensor and obtains displacement information of the thimble according to the sampling information;
C. and the programmable controller judges whether the thimble is pushed forward or backward according to the displacement information of the thimble and controls the speed and the force of the thimble according to the judgment result.
And in the step B, the sampling information sent by the displacement sensor comprises the displacement information of the piston rod of the ejector rod oil cylinder, and after the programmable controller acquires the sampling information sent by the displacement sensor, the displacement information of the ejector pin is calculated according to the mapping relation between the displacement information of the piston rod and the displacement information of the ejector pin.
In step C, the programmable controller judges whether the thimble is before or after jacking according to the displacement information of the piston rod, and the judgment mode is as follows: and the absolute zero position is arranged on a middle plate of the die casting machine, the programmable controller judges the distance between the thimble and the absolute zero position according to the displacement information of the thimble, if the distance between the thimble and the middle plate is in an increasing trend, the distance is judged to be before the thimble is pushed, and if the distance between the thimble and the middle plate is in a decreasing trend, the distance is judged to be after the thimble is pushed.
And step C, the programmable controller controls the opening degrees of a proportional pressure valve and a proportional flow valve on an oil pipe of the oil pump according to the judgment of whether the thimble is pushed up or not, so that the speed and the force of the thimble are controlled through the transmission mechanism.
In step C, if the programmable controller judges that the thimble is in front of the top, the process of controlling the thimble in front of the top is as follows in sequence: buffering before high pressure pushes up, fast pushes up, pushes up before, if programmable controller judges that the thimble is pushing up the back, then the process after the control thimble pushes up does in proper order: high-pressure jacking, quick jacking and buffering.
The ejection control system of the die casting machine adopts the displacement sensor to detect the displacement information of corresponding parts on the equipment so as to obtain the displacement information of the thimble, and the programmable controller controls the speed and the force of the thimble according to the displacement information of the thimble, so that the thimble is stable and smooth in action and very stable and accurate in starting and stopping actions in the process of ejecting the thimble in front and at the back, thereby reducing the impact strength generated in the movement process of the thimble and ensuring the action efficiency of the thimble and the accuracy of the ejection stroke position.
Drawings
Fig. 1 is a schematic view of an overall structure of a die casting machine according to an embodiment of the present invention.
Fig. 2 is a control flow chart of the ejection control system of the die casting machine in an embodiment of the utility model.
Fig. 3 is a schematic connection diagram of an ejection control system of a die casting machine according to an embodiment of the present invention.
Detailed Description
The utility model is further described with reference to the following figures and examples.
Referring to fig. 1 and 3, the ejection control system of the die casting machine comprises an ejection device, a transmission mechanism, a programmable controller, a displacement sensor and a pressure flow valve, wherein the programmable controller is respectively connected with the displacement sensor and the pressure flow valve, the programmable controller is connected with the ejection device through the transmission mechanism, the pressure flow valve is arranged on the transmission mechanism, the displacement sensor is used for detecting the displacement of a piston rod in an ejector pin oil cylinder 6, the programmable controller is used for receiving displacement information sent by the displacement sensor, and the programmable controller controls the opening degree of the pressure flow valve so as to control the speed and the force of the ejection device through the transmission mechanism.
The transmission mechanism comprises an oil pump, a thimble oil cylinder 6 and a thimble connecting rod, the ejection device at least comprises a thimble, the programmable controller is connected with the oil pump, the oil pump is connected with the thimble oil cylinder 6, and the thimble oil cylinder 6 is connected with the thimble through the thimble connecting rod.
The oil pump is connected with the thimble oil cylinder 6 through an oil pipe, the pressure flow valve is arranged on the oil pipe and comprises a proportional pressure valve and a proportional flow valve, the programmable controller controls the stretching force of a piston rod in the thimble oil cylinder 6 by controlling the opening degrees of the proportional pressure valve and the proportional flow valve of the oil pump, and the piston rod drives the thimble to move through the thimble connecting rod so as to realize the front-to-back jacking motion.
The thimble oil cylinder 6 comprises a cylinder body and a piston rod, one end of the thimble connecting rod is connected with the piston rod, and the other end of the thimble connecting rod is connected with a middle plate of a die casting machine.
The die casting machine includes frame 1, mode locking hydro-cylinder 2, tailboard 4, machine hinge mechanism 5, movable mould board 7 and fixed die plate 8, tailboard 4, movable mould board 7 and fixed die plate 8 set up in frame 1, mode locking hydro-cylinder 2 is connected with tailboard 4, tailboard 4 passes through machine hinge mechanism 5 and connects movable mould board 7, movable mould board 7 sets up between tailboard 4 and fixed die plate 8, thimble hydro-cylinder 6 sets up on movable mould board 7, the top of movable mould board 7 is provided with manipulator 9, tiebar 3 is installed at the upper and lower both ends of tailboard 4.
Referring to fig. 2, the control method of the ejection control system of the die casting machine comprises the following steps:
A. after the die casting machine is started, the displacement sensor detects displacement information and samples and sends the detected displacement information to the programmable controller;
B. the programmable controller acquires sampling information sent by the displacement sensor and obtains displacement information of the thimble according to the sampling information;
C. and the programmable controller judges whether the thimble is pushed forward or backward according to the displacement information of the thimble and controls the speed and the force of the thimble according to the judgment result.
In the step B, the sampling information sent by the displacement sensor comprises the displacement information of the piston rod of the ejector rod oil cylinder 6, and after the programmable controller obtains the sampling information sent by the displacement sensor, the displacement information of the ejector pin is calculated according to the mapping relation between the displacement information of the piston rod and the displacement information of the ejector pin.
In step C, the programmable controller judges whether the thimble is before or after jacking according to the displacement information of the piston rod, and the judgment mode is as follows: locate the middle plate of die casting machine with absolute zero-bit on, programmable controller judges the distance between thimble and the absolute zero-bit according to the displacement information of thimble, if the distance of thimble and middle plate is the increase trend, then before judging the thimble top, the process before programmable controller control thimble top is in proper order: high-pressure jacking front, quick jacking front and jacking front buffering; if the distance between the thimble and the middle plate is in a decreasing trend, after the thimble is judged to be jacked, the process of the programmable controller controlling the thimble to be jacked sequentially comprises the following steps: high-pressure jacking, quick jacking and buffering.
The high-pressure jacking front buffer, the high-speed jacking front buffer, the high-pressure jacking rear buffer and the high-speed jacking rear buffer are realized by controlling the opening degrees of a proportional pressure valve and a proportional flow valve on an oil pipe of an oil pump through a programmable controller and further controlling the speed and the force of an ejector pin through a transmission mechanism.
In the above pre-ejection process, the parameter ranges of the respective pre-ejection sections are as follows:
in the process before high-pressure jacking, the range of a proportional pressure valve of the oil pump is 12-16Mpa, the range of a proportional flow valve is 20-40%, and the range of the ejector pin is 1-10 MM.
In the process of quick ejection, the range of the oil pump proportional pressure valve is 3-10Mpa, the range of the proportional flow valve is 40-100%, the displacement range of the ejector pin is set according to different models of die casting machines, and the total stroke of the ejector pin in the process of quick ejection minus the total stroke of the high-pressure ejection and the front buffering is the stroke of the ejector pin in the process of quick ejection.
In the buffering process before jacking, the range of the proportional pressure valve of the oil pump is 2-10Mpa, the range of the proportional flow valve is 10-30%, and the range of the thimble is 10-30 MM.
In the above-mentioned back-to-back process, the parameter ranges of each back-to-back section are as follows:
in the process of high-pressure jacking, the range of a proportional pressure valve of the oil pump is 12-16Mpa, the range of a proportional flow valve is 20-40%, and the range of the ejector pin is 1-10 MM.
In the process of quick ejection, the range of the oil pump proportional pressure valve is 3-10Mpa, the range of the proportional flow valve is 40-100%, the displacement range of the ejector pin is set according to different models of die casting machines, and the total stroke of the two processes of high-pressure ejection subtraction and post-ejection buffering in the process of the post-ejection of the ejector pin is the stroke of the ejector pin in the process of quick ejection.
In the buffering process after jacking, the range of the proportional pressure valve of the oil pump is 2-10Mpa, the range of the proportional flow valve is 10-30%, and the range of the thimble is 10-30 MM.
In the actual use process, specific parameters can be selected from the above parameter ranges to realize the front-top and back-top processes.
The ejection control system of the die casting machine adopts the displacement sensor to detect the displacement information of the piston rod on the thimble oil cylinder 6, the programmable controller obtains the displacement information of the thimble according to the displacement information, and the programmable controller controls the speed and the force of the thimble according to the displacement information of the thimble, thereby controlling the process before the thimble is ejected by buffering before high-pressure ejection, before fast ejection and before ejection, and controlling the process after the thimble is ejected by buffering after high-pressure ejection, after fast ejection and after ejection.
The programmable controller controls the thimble to buffer before pushing up by high pressure, before pushing up quickly and before pushing up, and controls the thimble to buffer after pushing up by high pressure, after pushing up quickly and after pushing up, the start and stop of the thimble movement and the conversion and connection stage between the sections, the pressure and flow output by the oil pump are changed in a parabola ascending or descending way according to a certain slope, which shows that the actions of the thimble are stable and smooth, and the start and stop actions are very stable and accurate.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the utility model.
The foregoing is a preferred embodiment of the present invention, and the basic principles, principal features and advantages of the utility model are shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, and the utility model is intended to be protected by the following claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides an ejecting control system of die casting machine, includes ejecting device and drive mechanism, its characterized in that: the automatic ejection device comprises a programmable controller, a pressure flow valve, a transmission mechanism, a pressure flow valve, a displacement sensor, a pressure flow valve, a push-out device and a push-out device, and is characterized by further comprising the programmable controller, the displacement sensor and the pressure flow valve, wherein the programmable controller is respectively connected with the displacement sensor and the pressure flow valve, the programmable controller is connected with the push-out device through the transmission mechanism, the pressure flow valve is arranged on the transmission mechanism, and the programmable controller controls the opening degree of the pressure flow valve so as to control the speed and the force of the push-out device through the transmission mechanism.
2. The die casting machine ejection control system of claim 1, wherein: the transmission mechanism comprises an oil pump, a thimble oil cylinder (6) and a thimble connecting rod, the ejection device at least comprises a thimble, the programmable controller is connected with the oil pump, the oil pump is connected with the thimble oil cylinder (6), and the thimble oil cylinder (6) is connected with the thimble through the thimble connecting rod.
3. The die casting machine ejection control system of claim 2, wherein: the oil pump is connected with the thimble oil cylinder (6) through an oil pipe, and the pressure flow valve is arranged on the oil pipe and comprises a proportional pressure valve and a proportional flow valve.
4. The die casting machine ejection control system of claim 3, wherein: the thimble oil cylinder (6) comprises a cylinder body and a piston rod, one end of the thimble connecting rod is connected with the piston rod, and the other end of the thimble connecting rod is connected with a middle plate of a die casting machine.
5. The die casting machine ejection control system of claim 4, wherein: the die casting machine comprises a mold locking oil cylinder (2), a tail plate (4), a machine hinge mechanism (5), a movable template (7) and a fixed template (8), the mold locking oil cylinder (2) is connected with the tail plate (4), the tail plate (4) is connected with the movable template (7) through the machine hinge mechanism (5), the movable template (7) is arranged between the tail plate (4) and the fixed template (8), and an ejector pin oil cylinder (6) is arranged on the movable template (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122009735.9U CN215824227U (en) | 2021-08-24 | 2021-08-24 | Ejection control system of die casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122009735.9U CN215824227U (en) | 2021-08-24 | 2021-08-24 | Ejection control system of die casting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215824227U true CN215824227U (en) | 2022-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122009735.9U Active CN215824227U (en) | 2021-08-24 | 2021-08-24 | Ejection control system of die casting machine |
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| Country | Link |
|---|---|
| CN (1) | CN215824227U (en) |
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2021
- 2021-08-24 CN CN202122009735.9U patent/CN215824227U/en active Active
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Address after: No.6, Wusha section, Shunfan Road, Wusha community, Daliang Street office, Shunde District, Foshan City, Guangdong Province Patentee after: Guangdong Liansheng Precision Intelligent Equipment Technology Co.,Ltd. Address before: No.6, Wusha section, Shunfan Road, Wusha community, Daliang Street office, Shunde District, Foshan City, Guangdong Province Patentee before: LANSON PRECISION MACHINERY CO.,LTD. |