CN113714451B - Pneumatic impact system with safety interlocking loop - Google Patents
Pneumatic impact system with safety interlocking loop Download PDFInfo
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- CN113714451B CN113714451B CN202111056013.7A CN202111056013A CN113714451B CN 113714451 B CN113714451 B CN 113714451B CN 202111056013 A CN202111056013 A CN 202111056013A CN 113714451 B CN113714451 B CN 113714451B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
- B21J13/03—Die mountings
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Abstract
The invention discloses a pneumatic impact system with a safety interlocking loop, which is used for pneumatic loading and unloading of a forging die. The pneumatic impact system comprises a compressed air source, a pneumatic duplex member, an air storage tank, an impact cylinder, a quick exhaust valve, a pneumatic control two-position five-way valve, a manual two-position four-way valve, a tensioning cylinder and a manual two-position five-way valve. The manual two-position four-way valve is used for controlling the reversing of the pneumatic control two-position five-way valve. The air inlet of the manual two-position five-way valve is fixedly connected with the air pipe of the air storage tank through a corresponding air pipe, and the manual two-position five-way valve is used for controlling the tensioning and loosening of the tensioning air cylinder. The pneumatic impact system provided by the invention has a safety interlocking loop, can effectively prevent the situation that the wedging machine is triggered to perform striking action due to misoperation, ensures the personal safety of operators, can independently move and operate, gets rid of the constraint that the traditional wedging machine needs to bind a forklift, and has wide applicability and no occupied space.
Description
Technical Field
The present invention relates to pneumatic impact systems, and more particularly to a pneumatic impact system with a safety interlock circuit.
Background
Along with the rapid development of forging equipment and automatic matched auxiliary machines in recent years, the production efficiency and the quality of finished products of products are greatly improved, in addition, safety is important in the production process, and part of factories adopt a mode of manually swinging a bumper to drive in and drive out a die wedge when the forging equipment is used for die replacement, so that great potential safety hazards exist.
The traditional wedge iron machine body type and weight are large, the movement and the operation are needed by virtue of a forklift, the transportation vehicle is occupied, the operation cannot be performed in a small space, and the personal safety of operators cannot be ensured in the process of driving in and out the die wedge iron.
Disclosure of Invention
Based on the pneumatic impact system, the pneumatic impact system with the safety interlocking loop is provided for solving the problem of high risk of initial manual operation and has the advantage of being capable of independently moving and operating, so that the constraint that the traditional wedging machine needs to bind a forklift is eliminated.
A pneumatic impact system with a safety interlocking loop is used for pneumatic loading and unloading of a forging die and comprises a compressed air source, a pneumatic duplex member and an air storage tank;
the pneumatic impact system further comprises an impact cylinder, a quick exhaust valve, a pneumatic control two-position five-way valve, a manual two-position four-way valve, a tensioning cylinder and a manual two-position five-way valve;
the manual two-position four-way valve is used for controlling the reversing of the pneumatic control two-position five-way valve;
the air inlet of the manual two-position five-way valve is fixedly connected with the air pipe of the air storage tank through a corresponding air pipe, and the manual two-position five-way valve is used for controlling the tensioning and loosening of the tensioning air cylinder.
The pneumatic impact system has the safety interlocking loop, so that the condition that the wedge iron machine is driven to strike by misoperation can be effectively prevented, the personal safety of operators is guaranteed, the pneumatic impact system can be independently moved and operated, the constraint that the traditional wedge iron machine needs to be bound with a forklift is eliminated, the applicability is wide, the occupied space is avoided, and the use flexibility is high.
In one embodiment, the air inlet of the pneumatic control two-position five-way valve is fixedly connected with the air outlet pipe of the air storage tank through a corresponding air pipe; and an air inlet of the manual two-position four-way valve is fixedly connected with an air outlet pipe of the air storage tank through a corresponding air pipe.
The two groups of control holes of the pneumatic control two-position five-way valve are fixedly connected with the two groups of pneumatic control ports of the manual two-position four-way valve through corresponding air pipes respectively;
the impact cylinder and the pneumatic control two-position five-way valve are fixedly connected with the quick exhaust valve through corresponding air pipes; the quick exhaust valve is positioned between the impact cylinder and the pneumatic control two-position five-way valve;
the compressed air source and the air storage tank are respectively and fixedly connected to the corresponding two side positions of the pneumatic linkage through corresponding air pipes;
the pneumatic impact system is applied to a pneumatic wedging machine, and the pneumatic wedging machine is used for detaching the forging die; the pneumatic wedging machine comprises forging equipment, a tensioning chain, a die wedge and a ram; the die wedge is fit in the forging equipment;
the tensioning chain is connected with a tensioning piston of the tensioning cylinder, and the position of the tensioning chain is adjusted through the tensioning cylinder; when the tensioning piston is positioned in the tensioning cylinder, the tensioning chain is in a tensioning state, and at the moment, the collision head and the die wedge iron are tightly pulled;
when the tensioning piston of the tensioning cylinder stretches out, the tensioning chain is in a loose state, at the moment, the collision head is separated from the die wedge, and the length and the position of the tensioning chain are adjustable;
the collision head corresponds to the collision piston of the collision cylinder, and the position of the collision head is adjusted through the collision cylinder;
when the impact piston of the impact cylinder is extended, the impact head impacts the die wedge under the pushing of the impact piston, and at this time, the die wedge is detached from the forging apparatus.
Compared with the prior art, the invention has the beneficial effects that:
through the cooperation between quick discharge valve, pneumatic control two-position five-way valve, manual two-position four-way valve, tensioning cylinder, manual two-position five-way valve and tensioning chain, constitute a safety interlocking return circuit for the striking piston is stable to be arranged in the striking cylinder and can't carry out the switching-over through pressing manual two-position four-way valve, thereby effectively prevent because of the manual two-position four-way valve of maloperation, lead to triggering the condition that the wedge machine was beaten to the promotion, thereby guarantee operating personnel's personal safety.
In summary, the pneumatic impact system provided by the invention is provided with the safety interlocking loop, so that the condition that the wedge iron machine is triggered by misoperation to perform striking action can be effectively prevented, the personal safety of operators is ensured, and the pneumatic impact system of the embodiment can independently move and operate, so that the constraint that the traditional wedge iron machine needs to bind a forklift is eliminated, the applicability is wide, the space is not occupied, and the use flexibility is high.
Drawings
Fig. 1 is a schematic air circuit diagram of a pneumatic impact system with a safety interlock circuit according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a pneumatic wedging machine according to embodiment 2 of the present invention.
Description of the main reference signs
1. A compressed air source; 2. a pneumatic linkage; 3. a gas storage tank; 4. an impact cylinder; 5. a quick exhaust valve; 6. a pneumatic control two-position five-way valve; 7. a manual two-position four-way valve; 8. tensioning an air cylinder; 9. a manual two-position five-way valve; 10. forging equipment; 11. tensioning the chain; 12. wedge iron of the mould; 13. and (5) bumping.
The foregoing general description of the invention will be described in further detail with reference to the drawings and detailed description.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that when an element is referred to as being "mounted to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to FIG. 1, the present embodiment provides a pneumatic impact system with a safety interlock circuit for pneumatic loading and unloading of forging dies. The pneumatic impact system comprises a compressed air source 1, a pneumatic linkage 2, an air storage tank 3, an impact cylinder 4, a quick exhaust valve 5, a pneumatic control two-position five-way valve 6, a manual two-position four-way valve 7, a tensioning cylinder 8 and a manual two-position five-way valve 9.
The compressed air source 1 and the air storage tank 3 are respectively and fixedly connected with the corresponding two sides of the pneumatic linkage 2 through corresponding air pipes. The air inlet of the pneumatic control two-position five-way valve 6 is fixedly connected with the air outlet pipe of the air storage tank 3 through a corresponding air pipe. The air inlet of the manual two-position four-way valve 7 is fixedly connected with the air outlet pipe of the air storage tank 3 through a corresponding air pipe, and is used for controlling the reversing of the pneumatic control two-position five-way valve 6. The two groups of control holes of the pneumatic control two-position five-way valve 6 are respectively and fixedly connected with the two groups of pneumatic control ports of the manual two-position four-way valve 7 through corresponding air pipes. The air inlet of the manual two-position five-way valve 9 is fixedly connected with the air pipe of the air storage tank 3 through a corresponding air pipe and is used for controlling the tensioning and releasing of the tensioning air cylinder 8. The gas output by the compressed air source 1 enters the pneumatic linkage 2, is directionally conveyed into the gas storage tank 3 after being filtered, and the gas storage tank 3 respectively conveys the gas to the manual two-position five-way valve 9, the manual two-position four-way valve 7 and the pneumatic two-position five-way valve 6 along three branches.
The impact cylinder 4 and the pneumatic control two-position five-way valve 6 are fixedly connected with the quick exhaust valve 5 through corresponding air pipes. The quick exhaust valve 5 is positioned between the impact cylinder 4 and the pneumatic control two-position five-way valve 6. The die wedge 12 fits snugly within the forging apparatus 10.
The pneumatic impact system of this embodiment is divided into an adjustment and safety interlock state and a tightening and striking state when in operation, and the cooperative work of the pneumatic impact system in each state is as follows.
Adjustment and safety interlock status: the gas output by the compressed air source 1 enters the pneumatic linkage 2, is directionally conveyed into the gas storage tank 3 after being filtered, and the gas storage tank 3 respectively conveys the gas to the manual two-position five-way valve 9, the manual two-position four-way valve 7 and the pneumatic two-position five-way valve 6 along three branches. The gas entering the manual two-position five-way valve 9 is divided into two paths of output, one path of gas is conveyed into a rodless cavity of the tensioning cylinder 8, under the action of air pressure, a tensioning piston in the tensioning cylinder 8 is pushed out, and a tensioning chain 11 connected with the tensioning piston is in a loose state, and at the moment, the length and the position of the tensioning chain 11 can be manually adjusted. The other gas output by the manual two-position five-way valve 9 is introduced into the manual two-position four-way valve 7, the valve core of the manual two-position four-way valve 7 is always at the original position under the action of gas pressure, at the moment, the manual two-position four-way valve 7 cannot be pressed for reversing, the gas output by the manual two-position four-way valve 7 reverses the pneumatic control two-position five-way valve 6, the gas conveyed by the pneumatic control two-position five-way valve 6 enters a rod cavity of the impact cylinder 4 through the quick exhaust valve 5, at the moment, the gas without the rod cavity is rapidly exhausted through the quick exhaust valve 5, so that the impact piston is retracted to the bottom of the impact cylinder 4, and the impact action is prevented, thereby forming a safety interlocking loop.
According to the embodiment, the quick exhaust valve 5, the pneumatic control two-position five-way valve 6, the manual two-position four-way valve 7, the tensioning cylinder 8, the manual two-position five-way valve 9 and the tensioning chain 11 are cooperatively matched to form a safety interlocking loop, so that the impact piston is stably arranged in the impact cylinder 4 and cannot be reversed by pressing the manual two-position four-way valve 7, the condition that the impact action is caused by the fact that the wedge iron machine is triggered due to misoperation of the manual two-position four-way valve 7 is effectively prevented, and the personal safety of operators is ensured.
Tensioning and striking conditions: after the height and position of the tensioning chain 11 are adjusted, the manual two-position five-way valve 9 is manually reversed, the pneumatic linkage 2 filters the gas output by the compressed air source 1 and then conveys the gas into the gas storage tank 3, and the gas storage tank 3 conveys the gas into the manual two-position five-way valve 9, the manual two-position four-way valve 7 and the pneumatic two-position five-way valve 6 along three branches respectively. Because the manual two-position five-way valve 9 is commutated in advance, at the moment, the gas which is led into the manual two-position five-way valve 9 is conveyed to the rod cavity of the tensioning cylinder 8, in the process, the tensioning piston moves reversely and retracts into the tensioning cylinder 8, at the moment, the tensioning chain 11 pulls the ram 13 of the wedge iron machine to be tightly attached to the die wedge 12 of the forging equipment 10, the other gas of the manual two-position five-way valve 9 is conveyed into the manual two-position four-way valve 7, the gas in the pneumatic control hole of the manual two-position four-way valve 7 is discharged, the interlocking state is relieved, and the manual two-position four-way valve 7 can press the manual two-position four-way valve 7 to commutate only by supporting the valve core through the internal spring. The manual two-position four-way valve 7 is pressed to change the direction, so that the gas output by the manual two-position four-way valve 7 changes the direction of the gas acting on the pneumatic two-position five-way valve 6, the gas output by the pneumatic two-position five-way valve 6 enters the rodless cavity of the impact cylinder 4 through the quick exhaust valve 5, the gas with the rod cavity is rapidly discharged through the quick exhaust valve 5, and the 4 piston of the impact cylinder instantaneously stretches out to push the impact head 13 to impact the die wedge 12, the pneumatic impact operation is completed, and the pneumatic unloading of the forging die is realized.
In summary, the pneumatic impact system of the embodiment has the following advantages compared with the current wedging machine: the pneumatic impact system of the embodiment is provided with the safety interlocking loop, so that the condition that the wedge iron machine is driven to strike by misoperation can be effectively prevented, the personal safety of operators is guaranteed, the pneumatic impact system of the embodiment can be independently moved and operated, the constraint that the traditional wedge iron machine needs to be bound with a forklift is eliminated, the applicability is wide, the occupied space is avoided, and the use flexibility is high.
Example 2
Referring to fig. 2, the present embodiment provides a pneumatic wedge machine for use in a pneumatic impact system with a safety interlock circuit as in embodiment 1. The pneumatic wedging machine is used for detaching a forging die and comprises a forging device 10, a tensioning chain 11, a die wedge 12 and a ram 13.
The die wedge 12 fits snugly within the forging apparatus 10. The tensioning chain 11 is connected with the tensioning piston of the tensioning cylinder 8, and the tensioning chain 11 is position-adjusted by the tensioning cylinder 8. When the tensioning piston is positioned in the tensioning cylinder 8, the tensioning chain 11 is in a tensioned state, and at the moment, the striker 13 and the die wedge 12 are tightly pulled. When the tensioning piston of the tensioning cylinder 8 is extended, the tensioning chain 11 assumes a relaxed state, in which the striker 13 and the die wedge 12 are separated and the length and position of the tensioning chain 11 are adjustable.
The striker 13 corresponds to the percussion piston of the percussion cylinder 4, and the striker 13 is position-adjusted by the percussion cylinder 4. When the percussion piston of the percussion cylinder 4 is extended, the ram 13 strikes the die wedge 12 under the pushing of the percussion piston, at which time the die wedge 12 is removed from the forging apparatus 10.
The pneumatic wedging machine of the embodiment does not need to be bound with a forklift, can independently move and forge the die to load and unload, and has small occupied space and flexible use.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (1)
1. A pneumatic impact system with a safety interlocking loop is used for pneumatic loading and unloading of a forging die and comprises a compressed air source (1), a pneumatic linkage (2) and an air storage tank (3);
the pneumatic impact system is characterized by further comprising an impact cylinder (4), a quick exhaust valve (5), a pneumatic control two-position five-way valve (6), a manual two-position four-way valve (7), a tensioning cylinder (8) and a manual two-position five-way valve (9);
the manual two-position four-way valve (7) is used for controlling the reversing of the pneumatic control two-position five-way valve (6);
the air inlet of the manual two-position five-way valve (9) is fixedly connected with the air pipe of the air storage tank (3) through a corresponding air pipe, and the manual two-position five-way valve (9) is used for controlling the tensioning and loosening of the tensioning air cylinder (8);
the air inlet of the pneumatic control two-position five-way valve (6) is fixedly connected with the air outlet pipe of the air storage tank (3) through a corresponding air pipe;
the air inlet of the manual two-position four-way valve (7) is fixedly connected with the air outlet pipe of the air storage tank (3) through a corresponding air pipe;
the two groups of control holes of the pneumatic control two-position five-way valve (6) are fixedly connected with the two groups of pneumatic control ports of the manual two-position four-way valve (7) through corresponding air pipes respectively;
the impact cylinder (4) and the pneumatic control two-position five-way valve (6) are fixedly connected with the quick exhaust valve (5) through corresponding air pipes;
the quick exhaust valve (5) is positioned between the impact cylinder (4) and the pneumatic control two-position five-way valve (6);
the compressed air source (1) and the air storage tank (3) are respectively and fixedly connected to the corresponding two side positions of the pneumatic linkage (2) through corresponding air pipes;
the pneumatic impact system is applied to a pneumatic wedging machine, and the pneumatic wedging machine is used for detaching the forging die;
the pneumatic wedging machine comprises forging equipment (10), a tensioning chain (11), a die wedge (12) and a ram (13);
the die wedge (12) is fit in the forging equipment (10);
the tensioning chain (11) is connected with a tensioning piston of the tensioning cylinder (8), and the tensioning chain (11) is subjected to position adjustment through the tensioning cylinder (8);
when the tensioning piston is positioned in the tensioning cylinder (8), the tensioning lock chain (11) is in a tensioning state, and at the moment, the collision head (13) and the die wedge (12) are tensioned and stuck;
when the tensioning piston of the tensioning cylinder (8) stretches out, the tensioning chain (11) is in a loose state, at the moment, the collision head (13) is separated from the die wedge (12), and the length and the position of the tensioning chain (11) are adjustable;
the collision head (13) corresponds to the collision piston of the collision cylinder (4), and the collision head (13) performs position adjustment through the collision cylinder (4);
when the striking piston of the striking cylinder (4) is extended, the striking head (13) strikes the die wedge (12) under the pushing of the striking piston, and at this time, the die wedge (12) is detached from the forging apparatus (10).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111056013.7A CN113714451B (en) | 2021-09-09 | 2021-09-09 | Pneumatic impact system with safety interlocking loop |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111056013.7A CN113714451B (en) | 2021-09-09 | 2021-09-09 | Pneumatic impact system with safety interlocking loop |
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| CN113714451A CN113714451A (en) | 2021-11-30 |
| CN113714451B true CN113714451B (en) | 2023-05-12 |
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Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0677905B2 (en) * | 1989-09-12 | 1994-10-05 | 株式会社三和鉄工所 | Key striking device for forging machine |
| CN2510661Y (en) * | 2001-11-12 | 2002-09-11 | 王振 | Double-cylinder change inter-locking control valve set |
| CN202655537U (en) * | 2012-04-26 | 2013-01-09 | 上海春日机械工业有限公司 | Hydraulic locking device for material pinching table of cold header |
| CN202639177U (en) * | 2012-04-27 | 2013-01-02 | 海安县百协锻锤有限公司 | Pneumatic impactor |
| CN203900961U (en) * | 2014-05-15 | 2014-10-29 | 鹰普（中国）有限公司 | Pneumatic control structure of full-automatic pneumatic clamp |
| CN105156387A (en) * | 2015-08-24 | 2015-12-16 | 芜湖市汽车产业技术研究院有限公司 | Pneumatic reversing loop system controlled through stroke valve and reversing method |
| CN105216772B (en) * | 2015-10-23 | 2017-11-03 | 湖南晟通天力汽车有限公司 | Parking and handling interlock system |
| CN205996096U (en) * | 2016-08-31 | 2017-03-08 | 兴化市三诚精密锻造有限公司 | A kind of drop press bottom ejection device |
| CN108119669A (en) * | 2016-11-29 | 2018-06-05 | 杨晶 | One kind pneumatically beats drift machine spool control valve |
| CN106762929B (en) * | 2017-02-23 | 2018-03-13 | 中聚信海洋工程装备有限公司 | The hydraulic circuit and fuel supply method that anvil block is locked on a kind of hydrostatic forging machine |
| CN207077735U (en) * | 2017-08-03 | 2018-03-09 | 余姚华泰橡塑机械有限公司 | Cylinder control, safety device and injection (mo(u)lding) machine |
| CN213613893U (en) * | 2020-10-14 | 2021-07-06 | 江苏一重锻造有限公司 | Air hammer protection device for automobile plate forging |
| CN113118355B (en) * | 2021-04-20 | 2024-02-02 | 常熟市龙特耐磨球有限公司 | Automatic striking control device of hydraulic hammer |
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