CN113735424B - Secondary profiling press and control method thereof - Google Patents
Secondary profiling press and control method thereof Download PDFInfo
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- CN113735424B CN113735424B CN202111021580.9A CN202111021580A CN113735424B CN 113735424 B CN113735424 B CN 113735424B CN 202111021580 A CN202111021580 A CN 202111021580A CN 113735424 B CN113735424 B CN 113735424B
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- proximity switch
- electromagnetic
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- die
- cylinder
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/0013—Re-forming shaped glass by pressing
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a secondary pressing press and a control method thereof. Belonging to the technical field of secondary pressing of optical glass. The method mainly solves the problems that at present, secondary compression is easy to generate flash and affects the service life of a die. It is mainly characterized in that: the electromagnetic control valve comprises an electromagnetic cylinder, a second proximity switch, a first electromagnetic reversing valve, a first proximity switch, a middle proximity switch, a second electromagnetic reversing valve, a first throttle valve, a one-way valve and a second throttle valve 8; one output end of the first electromagnetic directional valve is connected with one end of the electromagnetic cylinder, and the other output end of the first electromagnetic directional valve is connected with the other end of the electromagnetic cylinder after passing through the second throttle valve and the second electromagnetic directional valve, the first throttle valve and the check valve (7) which are connected in parallel; the intermediate proximity switch is disposed between the second proximity switch and the first proximity switch. The invention has the characteristics of reducing the generation of flash, prolonging the service life of the die and improving the production efficiency, and is mainly used for secondary compression of optical glass.
Description
Technical Field
The invention belongs to the technical field of secondary pressing of optical glass, and particularly relates to a secondary pressing press and a control method thereof.
Background
The secondary pressing is a technological process of pressing the optical glass strip material which is formed by melting into a blank with a specific shape through a specific die after the material is prepared again and softened at high temperature by utilizing the plasticity of the optical glass material in the shape at high temperature. The power source of the press forming is compressed gas in an electromagnetic cylinder with a magnetic ring, a die is connected with the cylinder, the gas power transmits pressure to soften the blank through the cylinder and the die, so that the blank is deformed in a die cavity and reaches a preset shape, the process is a continuously repeated action, and the die has the problem of overlarge impact pressure in the process of extruding and softening the blank, so that the flash is poor due to overlarge impact force, the product quality is reduced, and the die abrasion is accelerated. In order to change the situation, a proximity switch is additionally arranged between two proximity switches on an electromagnetic cylinder on a press, the proximity switch can be adjusted at will and is provided with a starting point, after the cylinder descends to the proximity switch and a magnetic ring enables the switch to be electrified, the electromagnetic valve is controlled to be reversed through a built-in program of a PLC control system, so that a gas circuit passes through a throttle valve when in operation, the descending speed of the cylinder is reduced, a die slowly operates in a specified interval, the phenomena that the excessive impact force of the die acts on a softened blank to generate poor flash, the poor flash is reversely generated to damage the die to influence the service life of the die are avoided, the descending speed of the die is reduced, the final pressure of the die is not reduced to influence the product forming quality, the service life of the die is prolonged, the generation of the poor flash is reduced, and the purpose of reducing the production, operation and maintenance cost is achieved; meanwhile, due to the newly added control points, the operation speed can be increased in the first half descending stage and the ascending stage of the electromagnetic cylinder, so that the overall operation time of the cylinder is shortened, and the production efficiency is improved.
Disclosure of Invention
Aiming at the defects, the invention provides the secondary pressing press and the control method thereof, and the poor flash of the product is reduced and the production efficiency is improved by adjusting different running speed modes of the air cylinder.
The technical scheme of the secondary profiling press is as follows: the utility model provides a secondary die mould press for optical glass's secondary die mould, includes electromagnetic cylinder, second proximity switch, first electromagnetic directional valve and first proximity switch, and an output of first electromagnetic directional valve passes through the gas circuit and is connected its characterized in that with electromagnetic cylinder's one end: the electromagnetic reversing valve also comprises a middle proximity switch, a second electromagnetic reversing valve, a first throttle valve, a one-way valve and a second throttle valve; the intermediate proximity switch is arranged between the second proximity switch and the first proximity switch; and the other output end of the first electromagnetic directional valve is connected with the other end of the electromagnetic cylinder after passing through a second throttle valve and the second electromagnetic directional valve, the first throttle valve and the one-way valve which are connected in parallel through a gas circuit.
The middle proximity switch in the technical scheme of the secondary profiling press is arranged at a mounting position according to the distance that an upper die connected with an electromagnetic cylinder approaches a die sleeve at a slow speed.
According to the technical scheme of the secondary profiling press, when the distance between the edge of the lower end of an upper die connected with an electromagnetic cylinder and the edge of an upper opening of a die sleeve is about 1-10 mm, the lower end of the upper die approaches the die sleeve at a slow speed, and then approaches a softened blank in a die at a slow speed, so that the upper die is prevented from impacting the die sleeve, the softened blank is prevented from impacting, and the softened blank is prevented from impacting 5-10mm below the opening of the die sleeve.
The technical scheme of the secondary pressing press also comprises a PLC control circuit.
The technical solution of the control method of the invention is as follows: a control method of a secondary profiling press is characterized by comprising the following steps:
(1) the initial state of the electromagnetic cylinder is that the piston is positioned at the top end of the cylinder, and the magnetic ring on the piston is positioned at the position of the second proximity switch;
(2) controlling the other output end of the first electromagnetic directional valve to be opened, controlling the second electromagnetic directional valve to be in a normally-on state, controlling the one-way valve to be in a closed state, controlling gas of a gas source (10) to flow to the other end of the electromagnetic cylinder through the first electromagnetic directional valve, the second throttle valve and the second electromagnetic directional valve, and adjusting the second throttle valve to enable the piston to rapidly move from a second proximity switch position to a middle proximity switch position;
(3) when the piston rapidly runs to the middle proximity switch position, the second electromagnetic directional valve is controlled to be in a closed state, and the first throttle valve is adjusted to enable the piston to slowly run from the middle proximity switch position to the first proximity switch position;
(4) when the piston slowly moves from the middle proximity switch position to the first proximity switch position, the piston is controlled to stop operating, so that the molded part is shaped;
(5) after the molded part is molded, an output end of the first electromagnetic directional valve is controlled to be opened, gas of a gas source flows through the first electromagnetic directional valve to flow to one end of the electromagnetic cylinder, the one-way valve is in a conducting state, and the second throttle valve is adjusted to enable the piston to rapidly move from the first proximity switch position to the second proximity switch position.
In the step (2) of the technical scheme of the control method, the position of the middle proximity switch is adjusted, so that an upper die connected with the air cylinder approaches the die sleeve and the softened blank in the die at a slow speed.
In the step (3) of the technical solution of the control method of the present invention, the duration of closing the second electromagnetic directional valve is controlled to adjust to the softened blank forming.
In the step (4) of the technical scheme of the control method, the duration of the stop of the piston is controlled to be adjusted to the standard that the softened blank is filled in the whole die cavity to become a formed piece and the demolding is not easy to deform.
The control in the technical scheme of the control method is controlled by a PLC control circuit.
The steps (1) to (5) described in the technical solution of the control method of the present invention are repeated.
The invention adds the middle approach switch between the first approach switch and the second approach switch of the electromagnetic cylinder of the secondary compression production line, the middle approach switch can set the starting point at will, and adds the second throttle valve, the second electromagnetic directional valve, the first throttle valve and the one-way valve which are connected in parallel between the other output end of the first electromagnetic directional valve and the other end of the electromagnetic cylinder, therefore, when the magnetic ring in the electromagnetic cylinder passes through the middle approach switch and is electrified, the second electromagnetic directional valve is controlled to be in the closing state by the built-in program of the PLC control system, the first throttle valve is adjusted to reduce the descending speed of the electromagnetic cylinder in a certain interval, the mold connected with the electromagnetic cylinder also runs slowly, the impact pressure of the mold can be reduced, thereby prolonging the service life of the mold, reducing the generation of bad flash, and the other control intervals can accelerate the running speed and shorten the whole running time, thereby achieving the purposes of improving the production efficiency and reducing the production, operation and maintenance cost.
The invention has the characteristics of reducing the generation of flash, prolonging the service life of the die, improving the production efficiency and reducing the production, operation and maintenance cost. The invention is mainly used for secondary pressing of optical glass.
Drawings
Fig. 1 is an air path diagram of the operation mode of the initial state of the secondary pressing press.
FIG. 2 is a gas path diagram of the operation mode of the secondary pressing press in the state that the piston descends to pass through the middle proximity switch.
FIG. 3 is a gas path diagram of the operation mode of the secondary pressing press in the state that the piston rises to pass through the middle proximity switch after being formed.
In the figure: 1. an electromagnetic cylinder; 2. a magnetic ring; 3. a piston; 4. a second proximity switch; 5. a second electromagnetic directional valve; 6. a first throttle valve; 7. a one-way valve; 8. a second throttle valve; 9. a first electromagnetic directional valve; 10. a gas source; 11. die sleeve; 12. a lower die; 13. softening the blank; 14. an upper die; 15. a first proximity switch; 16. an intermediate proximity switch.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 2, an embodiment of a secondary press molding press according to the present invention includes an electromagnetic cylinder 1, a second proximity switch 4, a first electromagnetic directional valve 9, a first proximity switch 15, an intermediate proximity switch 16, a second electromagnetic directional valve 5, a first throttle valve 6, a check valve 7, a second throttle valve 8, and a PLC control circuit, and is used for secondary press molding of optical glass.
One output end of the first electromagnetic directional valve 9 is connected with one end of the electromagnetic cylinder 1 through an air path, the other output end of the first electromagnetic directional valve is connected with the second throttle valve 8 through an air path, and then is connected with the second electromagnetic directional valve 5, the first throttle valve 6 and the one-way valve 7 which are connected in parallel through the air path, and finally is connected with the other end of the electromagnetic cylinder 1. The second proximity switch 4 is arranged at the top end of the electromagnetic cylinder 1, and the first proximity switch 15 is arranged at the bottom end of the electromagnetic cylinder 1, as in the prior art. The middle proximity switch 16 is arranged between the second proximity switch 4 and the first proximity switch 15, a starting point can be set optionally, and a mounting position is set according to the distance that the upper die 14 connected with the electromagnetic cylinder 1 approaches the upper opening of the die sleeve 11 at a slow speed, so that the speed of the upper die 14 is reduced when the distance between the lower end edge of the upper die 14 and the upper opening edge of the die sleeve 11 is 1-10 mm, and the distance between the softened blank 13 in the die sleeve 11 and the upper opening edge of the die sleeve 11 is about 5-10 mm.
The invention discloses an embodiment of a control method of a secondary pressing press, which comprises the following steps:
(1) the initial state of the electromagnetic cylinder 1 is that the piston 3 is positioned at the top end of the cylinder, and the magnetic ring 2 on the piston 3 is positioned at the position of the second proximity switch 4;
(2) the PLC controls the program instruction piston 3 to move downwards, controls the other output end of the first electromagnetic directional valve 9 to be opened, controls the second electromagnetic directional valve 5 to be in a normally-on state, sets the long-pass time in the PLC control program instruction, controls the one-way valve 7 to be in a closed state because the lower end air pressure is greater than the upper end air pressure, opens the knob of the throttle valve 1 slightly and closes negligibly, and controls the second throttle valve 8 to enable the piston 3 to move from the position of the second proximity switch 4 to the position of the middle proximity switch 16 quickly by enabling the air of the air source 10 to flow to the other end (top end) of the electromagnetic cylinder 1 through the first electromagnetic directional valve 9, the second throttle valve 8 and the second electromagnetic directional valve 5;
(3) when the piston 3 rapidly runs to the position of the middle proximity switch 16, the magnetic ring 2 enables the middle proximity switch 16 to be electrified, the PLC controls the program to instruct the second electromagnetic directional valve 5 to be closed for a certain time, at the moment, the air flow only passes through the first throttle valve 6 after passing through the second throttle valve 8, and the first throttle valve 6 is adjusted to enable the piston 3 to slowly run from the position of the middle proximity switch (16) to the position of the first proximity switch (15); the position of the middle proximity switch 16 can be adjusted, preferably, the lower end edge of the upper die 14 approaches the upper opening edge of the die sleeve 11 at a slow speed, at the moment, the upper die 14 runs slowly, the die sleeve 11 and the softened blank 13 have no impact force, only pressure is applied to the softened blank 13, the die is not easy to damage, and because the softened blank 13 has fluidity, the upper die 14 has small pressure to the softened blank, and no bad flash can be generated; when the softened blank 13 is filled in the whole cavity, the softened blank 13 is slowly cooled due to the fact that the softened blank 13 is in contact with a mold with a lower temperature, the liquidity is poor, and at the moment, flash is not easy to generate; the closing duration time of the second electromagnetic directional valve 5 is set in a PLC control program so as to adjust the blank 13 to be softened into a standard for forming;
(4) when the piston 3 slowly moves from the position of the middle proximity switch 16 to the position of the first proximity switch 15, the softened blank 13 is filled in the whole cavity, the softened blank 13 becomes a formed piece, and the PLC control program instructs the upper die 14 to keep the position of the upper die in the die sleeve for a certain time to be unchanged so as to shape the formed piece;
(5) after the molded part is shaped, the PLC control program instructs the first electromagnetic directional valve 9 to change direction (one output end is opened, the other output end is closed), the air source 10 pushes the air cylinder to move upwards, then the air in the air cylinder flows through the second throttle valve 8 through the one-way valve 7, the air cylinder is in a faster operation state, when the piston 3 runs to the middle approach switch 16, although the PLC control program also instructs the second electromagnetic directional valve 5 to act, the one-way valve 7 is in a conduction state and plays a leading role, the first throttle valve 6 is close to be closed and does not work, the operation speed of the air cylinder is determined by adjusting the size of the second throttle valve 8 and still is in a faster operation state; when the piston 3 runs to the second proximity switch 4, one cylinder cycle action is completed;
(6) when the signal instruction exists, the PLC controls the program to instruct the cylinder to descend, and the process is repeated.
Claims (10)
1. The utility model provides a secondary die mould press for optical glass's secondary die mould, includes electromagnetic cylinder (1), second proximity switch (4), first electromagnetic directional valve (9) and first proximity switch (15), and an output of first electromagnetic directional valve (9) passes through the gas circuit to be connected its characterized in that with the one end of electromagnetic cylinder (1): the device also comprises a middle proximity switch (16), a second electromagnetic directional valve (5), a first throttle valve (6), a one-way valve (7) and a second throttle valve (8); the intermediate proximity switch (16) is arranged between the second proximity switch (4) and the first proximity switch (15); the other output end of the first electromagnetic directional valve (9) passes through a second throttle valve (8) and a second electromagnetic directional valve (5), a first throttle valve (6) and a one-way valve (7) which are connected in parallel through a gas circuit and then is connected with the other end of the electromagnetic cylinder (1).
2. The secondary profiling press according to claim 1, characterized in that: the middle proximity switch (16) is arranged at a mounting position according to the distance that an upper die (14) connected with the electromagnetic cylinder (1) approaches the die sleeve (11) at a slow speed.
3. The secondary profiling press according to claim 2, characterized in that: when the edge of the lower end of an upper die (14) connected with the electromagnetic cylinder (1) is 1-10 mm away from the edge of an upper opening of the die sleeve, the lower end of the upper die approaches the die sleeve (11) at a slow speed, and then approaches a softened blank (13) in the die at a slow speed.
4. A secondary profiling press according to claim 1, 2 or 3, characterised in that: also comprises a PLC control circuit.
5. A method of controlling a secondary profiling press according to claim 1, characterised by the steps of:
(1) the initial state of the electromagnetic cylinder (1) is that the piston (3) is positioned at the top end of the cylinder, and the magnetic ring (2) on the piston (3) is positioned at the position of the second proximity switch (4);
(2) controlling the other output end of the first electromagnetic directional valve (9) to be opened, controlling the second electromagnetic directional valve (5) to be in a normally open state, controlling the one-way valve (7) to be in a closed state, controlling gas of a gas source (10) to flow to the other end of the electromagnetic cylinder (1) through the first electromagnetic directional valve (9), a second throttle valve (8) and the second electromagnetic directional valve (5), and adjusting the second throttle valve (8) to enable the piston (3) to rapidly move from the position of the second proximity switch (4) to the position of the middle proximity switch (16);
(3) when the piston (3) rapidly moves to the position of the middle proximity switch (16), the magnetic ring (2) enables the middle proximity switch (16) to be electrified, the second electromagnetic reversing valve (5) is controlled to be in a closed state, and the first throttle valve (6) is adjusted to enable the piston (3) to slowly move from the position of the middle proximity switch (16) to the position of the first proximity switch (15);
(4) when the piston (3) slowly moves to the position of the first proximity switch (15) from the position of the middle proximity switch (16), the piston (3) is controlled to stop operating, so that the profile piece is shaped;
(5) after the molded part is molded, an output end of the first electromagnetic directional valve (9) is controlled to be opened, gas of the gas source (10) flows through the first electromagnetic directional valve (9) to flow to one end of the electromagnetic cylinder (1), the one-way valve (7) is in a conducting state, and the second throttle valve (8) is adjusted to enable the piston (3) to rapidly move from the position of the first proximity switch (15) to the position of the second proximity switch (4).
6. The method of controlling a secondary profiling press according to claim 5, wherein: in the step (2), the position of the middle approach switch (16) is adjusted, so that an upper die (11) connected with the air cylinder approaches the die sleeve (11) and the softened blank (13) in the die at a slow speed.
7. The method for controlling a secondary profiling press according to claim 5 or 6, characterized in that: and in the step (3), controlling the closing duration of the second electromagnetic directional valve (5) to adjust the blank softening (13) to be molded.
8. The method for controlling a secondary profiling press according to claim 5 or 6, characterized in that: and in the step (4), the duration of the stop operation of the piston (3) is controlled to be adjusted until the softened blank (13) is filled in the whole die cavity to form a formed piece and the demolding is not easy to deform.
9. The method for controlling a secondary profiling press according to claim 5 or 6, characterized in that: the control is controlled by a PLC control circuit.
10. The method for controlling a secondary profiling press according to claim 5 or 6, characterized in that: the steps (1) to (5) are repeated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111021580.9A CN113735424B (en) | 2021-09-01 | 2021-09-01 | Secondary profiling press and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111021580.9A CN113735424B (en) | 2021-09-01 | 2021-09-01 | Secondary profiling press and control method thereof |
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| CN113735424A CN113735424A (en) | 2021-12-03 |
| CN113735424B true CN113735424B (en) | 2022-08-09 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2208404A1 (en) * | 1971-03-03 | 1972-09-14 | Corning Glass Works | Press |
| JPH03265527A (en) * | 1990-03-14 | 1991-11-26 | Olympus Optical Co Ltd | Forming mold driving device for glass lens forming device |
| JPH0585750A (en) * | 1991-09-25 | 1993-04-06 | Sumitomo Heavy Ind Ltd | Press molding device for glass lens |
| JPH05154930A (en) * | 1991-12-02 | 1993-06-22 | Toyo Mach & Metal Co Ltd | Mold clamping device for foam molding machine |
| JP2004203686A (en) * | 2002-12-26 | 2004-07-22 | Nippon Electric Glass Co Ltd | Method and apparatus for press forming funnel glass for cathode-ray tube |
| CN106739071A (en) * | 2016-12-29 | 2017-05-31 | 江西新余国科科技股份有限公司 | Pneumatic control can automatic running smoothing press |
| CN208747921U (en) * | 2018-07-24 | 2019-04-16 | 博众精工科技股份有限公司 | The molding air-channel system and Curred glass forming machine of Curred glass forming machine |
-
2021
- 2021-09-01 CN CN202111021580.9A patent/CN113735424B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2208404A1 (en) * | 1971-03-03 | 1972-09-14 | Corning Glass Works | Press |
| JPH03265527A (en) * | 1990-03-14 | 1991-11-26 | Olympus Optical Co Ltd | Forming mold driving device for glass lens forming device |
| JPH0585750A (en) * | 1991-09-25 | 1993-04-06 | Sumitomo Heavy Ind Ltd | Press molding device for glass lens |
| JPH05154930A (en) * | 1991-12-02 | 1993-06-22 | Toyo Mach & Metal Co Ltd | Mold clamping device for foam molding machine |
| JP2004203686A (en) * | 2002-12-26 | 2004-07-22 | Nippon Electric Glass Co Ltd | Method and apparatus for press forming funnel glass for cathode-ray tube |
| CN106739071A (en) * | 2016-12-29 | 2017-05-31 | 江西新余国科科技股份有限公司 | Pneumatic control can automatic running smoothing press |
| CN208747921U (en) * | 2018-07-24 | 2019-04-16 | 博众精工科技股份有限公司 | The molding air-channel system and Curred glass forming machine of Curred glass forming machine |
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| CN113735424A (en) | 2021-12-03 |
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