CN106678115B - Welding gun cylinder and welding gun cylinder system - Google Patents
Welding gun cylinder and welding gun cylinder system Download PDFInfo
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- CN106678115B CN106678115B CN201510757296.6A CN201510757296A CN106678115B CN 106678115 B CN106678115 B CN 106678115B CN 201510757296 A CN201510757296 A CN 201510757296A CN 106678115 B CN106678115 B CN 106678115B
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- 238000003466 welding Methods 0.000 title claims abstract description 32
- 238000012546 transfer Methods 0.000 claims description 106
- 230000002000 scavenging effect Effects 0.000 claims description 61
- 238000009423 ventilation Methods 0.000 claims description 34
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 abstract description 6
- 230000009977 dual effect Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013022 venting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The invention discloses a welding gun cylinder, which comprises a first cylinder and a second cylinder, wherein the first cylinder comprises a first cylinder barrel, a first piston and a first piston rod, and the second cylinder comprises a second cylinder barrel, a second piston and a second piston rod; a first middle end cover is arranged between the first cylinder barrel and the second cylinder barrel; the second piston rod penetrates through the first middle end cover and is connected with the first piston rod; a built-in cylinder is also arranged in the second cylinder barrel in a sliding manner, and a second piston is arranged in the built-in cylinder in a sliding manner; the second piston rod is internally provided with a first vent pipeline, the rear end opening of the first vent pipeline is positioned between the second piston and the rear end cover of the built-in cylinder, and the front end opening of the first vent pipeline is positioned between the first piston and the first middle end cover. It need not independent to built-in cylinder air feed, has simplified the structure, when the second scavenge port admits air, has dual effort to the length of cylinder has been shortened, has reduced the cylinder volume. The invention also discloses a welding gun cylinder system and an operation method thereof.
Description
Technical Field
The invention relates to the technical field of cylinder parts used in a welding gun, in particular to a welding gun cylinder and a welding gun cylinder system.
Background
The welding gun cylinder is used for a welding gun, and a gun arm of the welding gun is pushed to move or swing through the action of the cylinder, so that welding is realized.
In the prior art, chinese patent application No. 201210195236.6 discloses a multi-stage push cylinder. Chinese patent application No. 201110309380.3 discloses a four-chamber cylinder with two linear strokes.
The two cylinders adopt the structure that the inner cylinder barrel and the outer cylinder barrel are sleeved mutually, so that the whole length of the common double-stroke series cylinder is shortened, and the built-in cylinder is required to be supplied with air independently. And the structure is complex, the manufacture is not easy, and air leakage is easy to occur, which causes poor actuation.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a welding gun cylinder and a welding gun cylinder system, which have simple structure, do not need to independently supply air to a built-in cylinder and can drive the built-in cylinder to reset through piston resetting.
In a first aspect, the technical scheme of the invention provides a welding gun cylinder, which comprises a first cylinder and a second cylinder, wherein the first cylinder comprises a first cylinder barrel, a first piston and a first piston rod, and the second cylinder comprises a second cylinder barrel, a second piston and a second piston rod; a first middle end cover is arranged between the first cylinder barrel and the second cylinder barrel, the other end of the first cylinder barrel is provided with a front end cover, and the other end of the second cylinder barrel is provided with a rear end cover; the second piston rod penetrates through the first middle end cover and is connected with the first piston rod; a built-in cylinder is further arranged in the second cylinder tube in a sliding manner, and the second piston is arranged in the built-in cylinder in a sliding manner; a first scavenging port for scavenging air of the first cylinder is arranged on the front end cover, a second scavenging port for scavenging air of the first cylinder and a first breathing port for breathing of a cylinder connected with the first cylinder are arranged on the first middle end cover, and a third scavenging port for scavenging air of the second cylinder is arranged on the rear end cover; the second piston rod is internally provided with a first vent pipeline, the rear end opening of the first vent pipeline is positioned between the second piston and the built-in cylinder rear end cover of the built-in cylinder, and the front end opening of the first vent pipeline is positioned between the first piston and the first middle end cover.
Preferably, the area of the rear end cover of the built-in cylinder is larger than the area of an annular area formed by the first piston and the first piston rod.
Preferably, the built-in cylinder has a first preset stroke in the second cylinder, the second piston has a second preset stroke in the built-in cylinder, the first piston has a third preset stroke in the first cylinder, and the third preset stroke is the sum of the first preset stroke and the second preset stroke.
Preferably, when the first scavenging port is used for air intake, the second scavenging port is used for air exhaust, and the third scavenging port is used for air exhaust, the first piston and the second piston both move towards the rear end cover side until the first piston and the first middle end cover are tightly attached together, the second piston and the built-in cylinder rear end cover are tightly attached together, and the built-in cylinder rear end cover and the rear end cover are tightly attached together; when the first scavenging port is used for air intake, the second scavenging port is used for air exhaust, and the third scavenging port is used for air intake, the built-in cylinder drives the second piston and the first piston to integrally move towards the front end cover side until the built-in cylinder front end cover of the built-in cylinder and the first middle end cover are tightly attached together; when the first transfer ports exhaust, the second transfer ports intake and the third transfer ports intake, the gas entering from the second transfer ports enters the built-in cylinder through the first ventilation pipeline; and the first piston and the second piston both move towards the front end cover side until the second piston is tightly attached to the front end cover of the built-in cylinder.
Preferably, a third cylinder is provided between the first cylinder and the second cylinder; the third cylinder comprises a third cylinder barrel, a third piston and a third piston rod; the front end of the third cylinder barrel is connected to the first middle end cover, a second middle end cover is arranged between the rear end of the third cylinder barrel and the second cylinder barrel, and a second breathing port used for breathing of a cylinder connected with the third cylinder is formed in the second middle end cover; the second piston rod penetrates through the second middle end cover and is connected with the third piston rod, and the front end opening of the first vent pipeline is positioned between the third piston and the second middle end cover; the third piston rod penetrates through the first middle end cover and is connected with the first piston rod; and a second vent pipeline communicated with the first vent pipeline is arranged in the third piston rod, and a second vent pipeline opening is further arranged in the second vent pipeline and is positioned between the first piston and the first middle end cover.
Preferably, two or more third cylinders are provided between the first cylinder and the second cylinder; a second middle end cover is arranged between any two adjacent third cylinders; any two adjacent third piston rods are connected, and any two adjacent second vent pipelines are communicated; in two adjacent third cylinders, the second vent line opening on the second vent line in the third cylinder near the second cylinder side is located between the third piston in the third cylinder near the first cylinder side and the second intermediate end cover; in the two or more third cylinders, the third piston rod in the third cylinder close to the first cylinder side is connected to the first piston rod, and the second vent line opening in the second vent line in the third cylinder is located between the first piston and the first intermediate end cap; in the two or more third cylinders, the third piston rod in the third cylinder on the side close to the second cylinder is connected to the second piston rod, and the front end opening of the first ventilation line is located between the third piston in the third cylinder and the second intermediate head cover.
Preferably, when the first scavenging port is used for air intake, the second scavenging port is used for air exhaust, and the third scavenging port is used for air exhaust, the first piston, the third piston and the second piston all move towards the rear end cover side until the first piston is tightly attached to the first middle end cover, the third piston is tightly attached to the second middle end cover, the second piston is tightly attached to the built-in cylinder rear end cover, and the built-in cylinder rear end cover is tightly attached to the rear end cover; when the first scavenging port is used for air intake, the second scavenging port is used for air exhaust, and the third scavenging port is used for air intake, the built-in cylinder drives the second piston, the third piston and the first piston to integrally move towards the front end cover side until the built-in cylinder front end cover of the built-in cylinder is tightly attached to the second middle end cover; when the first scavenging port exhausts, the second scavenging port admits and the third scavenging port admits, the gas entering from the second scavenging port enters the third cylinder through the second vent line, and the gas entering from the second scavenging port also enters the built-in cylinder through the first vent line; the first piston, the third piston and the second piston all move towards the front end cover side until the second piston is tightly attached to the front end cover of the built-in cylinder.
In a second aspect, the present invention further provides a welding gun cylinder system having the welding gun cylinder described in any one of the above technical solutions, further comprising a gas source, a first control valve for controlling the gas intake or exhaust of the first transfer port and the second transfer port in the welding cylinder, a second control valve for controlling the gas intake or exhaust of the third transfer port in the welding cylinder, and a gas supply line; the air source is connected with the first control valve and the second control valve through one air supply pipeline respectively; the first control valve is respectively connected with the first scavenging port and the second scavenging port through the two air supply pipelines; the second control valve is connected to the third transfer port via one of the supply lines.
Preferably, the first control valve controls the intake and exhaust relationship of the first transfer ports and the second transfer ports as follows: the second transfer ports exhaust when the first transfer ports admit air; the second transfer ports admit air when the first transfer ports exhaust.
Preferably, the second control valve controls the third transfer port to remain charged while the first control valve controls the second transfer port to be charged.
By adopting the technical scheme, the method has the following beneficial effects:
a first vent pipeline is arranged in the second piston rod, a rear end opening of the first vent pipeline is arranged between the second piston and a rear end cover of a built-in cylinder of the built-in cylinder, and a front end opening of the first vent pipeline is arranged between the first piston and the first middle end cover.
Therefore, when the second scavenging port admits air, the air enters the built-in cylinder through the first ventilation pipeline, at the moment, part of the air exerts pressure on the first piston, the air entering the built-in cylinder exerts pressure on the second piston, and the first piston and the second piston are driven to move simultaneously, so that double acting force is achieved.
And when the piston is reset, air is introduced through the first scavenging port to push the first piston and the second piston to reset, and the reset second piston drives the built-in cylinder to reset.
Thereby need not independent to built-in cylinder air feed, simplified the structure, when the second scavenge port admits air, have dual effort to the length of cylinder has been shortened, the cylinder volume has been reduced.
Drawings
FIG. 1 is a schematic structural view of a cylinder for a welding gun according to the present invention;
FIG. 2 is a schematic structural view of a first cylinder;
FIG. 3 is a schematic structural view of a second cylinder;
fig. 4 is a schematic structural view of the second piston rod;
FIG. 5 is a schematic view of the first and second pistons when reset;
FIG. 6 is a schematic view of the first and second pistons moving a first predetermined stroke;
FIG. 7 is a schematic view of the first and second pistons moving a second predetermined stroke;
FIG. 8 is a schematic view of a third cylinder disposed between the first and second cylinders;
FIG. 9 is a schematic view of the connection and engagement of the third cylinder with the first intermediate head cover;
FIG. 10 is a schematic view of an embodiment of a cylinder system of a welding gun;
FIG. 11 is a schematic view of another embodiment of a torch cylinder system.
Reference symbol comparison table:
1-a first cylinder; 11-a first cylinder; 12-a first piston;
13-a first piston rod; 2-a second cylinder; 21-a second cylinder;
22-a second piston; 23-a second piston rod; 24-a first vent line;
25-front end opening; 26-rear end opening; 3, arranging a cylinder inside;
31-front end cover of built-in cylinder; 32-rear end cover of built-in cylinder; 4-front end cover;
41-a first transfer port; 5-a first intermediate end cap; 51-a second transfer port;
52-a first breathing opening; 6-rear end cap; 61-third transfer ports;
7-a third cylinder; 71-a third cylinder; 72-a third piston;
73-a third piston rod; 74-a second vent line; 75-second vent line opening;
76-a second intermediate end cap; 77-a second breathing orifice; 81-a first control valve;
82-a second control valve; 9-a gas supply pipeline; 10-a gas source;
a-a first preset stroke; b-a second preset stroke; c-third preset stroke.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 to 4, a cylinder for a welding gun according to an embodiment of the present invention includes a first cylinder 1 and a second cylinder 2, where the first cylinder 1 includes a first cylinder 11, a first piston 12, and a first piston rod 13, and the second cylinder 2 includes a second cylinder 21, a second piston 22, and a second piston rod 23.
A first middle end cover 5 is arranged between the first cylinder 11 and the second cylinder 21, the other end of the first cylinder 11 is provided with a front end cover 4, and the other end of the second cylinder 21 is provided with a rear end cover 6. The second piston rod 23 passes through the first intermediate end cap 5 and is connected to the first piston rod 13.
The second cylinder 21 is also provided with a built-in cylinder 3 so as to slide therein, and the second piston 22 is disposed so as to slide in the built-in cylinder 3.
The front end cover 4 is provided with a first ventilation port 41 for ventilation of the first cylinder 1, the first intermediate end cover 5 is provided with a second ventilation port 51 for ventilation of the first cylinder 1 and a first breathing port 52 for breathing of a cylinder connected to the second cylinder 2, and the rear end cover 6 is provided with a third ventilation port 61 for ventilation of the second cylinder 2.
The second piston rod 23 also has a first ventilation line 24 therein, the rear end opening 26 of the first ventilation line 24 being between the second piston 22 and the inner cylinder rear end cap 32 of the inner cylinder 3, and the front end opening 25 thereof being between the first piston 12 and the first intermediate end cap 5.
That is, the torch cylinder is mainly composed of a first cylinder 1, a second cylinder 2, and an internal cylinder 3.
The first cylinder 1 is composed of a first cylinder barrel 11, a first piston 12 and a first piston rod 13. The second cylinder 2 is composed of a second cylinder 21, a second piston 22, and a second piston rod 23.
The first cylinder 11 is separated from the second cylinder 21 by a first intermediate end cap 5. The front end of the first cylinder 11 is provided with a front end cover 4, and the rear end of the second cylinder 21 is provided with a rear end cover 6.
A first piston 12 is located within the first cylinder 11 and is slidable under gas pressure between the front end cap 4 and the first intermediate end cap 5. The rear end of the first piston rod 13 is connected with the first piston 12, the front end of the first piston rod extends out of the front end cover 4, and the first piston rod can move along with the first sliding to form an output end which is used for driving a gun arm of a welding gun to move or swing so as to realize welding.
The built-in cylinder 3 is slidably disposed in the second cylinder 21, and is slidable between the rear end cover 6 and the first intermediate end cover 5 by the pneumatic pressure.
The second piston 22 is slidably disposed in the built-in cylinder 3, and is movable back and forth in the built-in cylinder 3 by air pressure, specifically, slidably between a built-in cylinder head 31 and a built-in cylinder head 32.
One end of the second piston rod 23 passes through the built-in cylinder front end cover 31 and is connected to the second piston 22, and the other end thereof passes through the first intermediate end cover 5 and is connected to the first piston rod 13. Thereby, a synchronous movement of the first piston 12 and the second piston 22 may be achieved.
The front end cover 4 is provided with a first ventilation port 41 for ventilation (intake or exhaust) of the first cylinder 1. A second ventilation opening 51 and a first ventilation opening 52 are provided in the first intermediate end cap 5, the second ventilation opening 51 being used for ventilation (intake or exhaust) of the first cylinder 1, and the first ventilation opening 52 being used for respiratory ventilation of the cylinder connected to the first cylinder 1, for example of the second cylinder 2 or of a third cylinder mentioned below. So that it is in gaseous communication with the external environment. The rear end cover 6 is provided with a third scavenging port 61 for scavenging (intake or exhaust) the second cylinder 2.
A first ventilation line 24 is arranged in the second piston rod 23, wherein the rear end opening of the first ventilation line 24 is located between the second piston 22 and the inner cylinder rear end cap 32 of the inner cylinder 3, and the front end opening 25 thereof is located between the first piston 12 and the first intermediate end cap 5.
Thus, when the second transfer ports 51 are supplied with air, the air enters the built-in cylinder 3 through the first vent line 24, and at this time, a part of the air in the first cylinder tube 11 applies pressure to the first piston 12, and the air entering the built-in cylinder 3 applies pressure to the second piston 22, and simultaneously drives the first piston 12 and the second piston 22 to move, and thus, the dual acting force is provided.
And when the second piston 22 is reset in the built-in cylinder 3, the gas enters the first cylinder barrel 11 through the first ventilation pipeline 24 and is finally discharged through the second ventilation port 51. The second piston 22 that is reset in the built-in cylinder 3 drives the built-in cylinder 3 to reset in the second cylinder 21.
Therefore, the welding gun cylinder provided by the invention does not need to supply air to the built-in cylinder independently, the structure is simplified, and double acting force is exerted when the second scavenging port supplies air, so that the length of the cylinder is shortened, and the volume of the cylinder is reduced.
As shown in fig. 1-3, in one embodiment, the area of the inner cylinder rear end cap 32 is larger than the area of the annular region formed by the first piston 12 and the first piston rod 13. With this arrangement, under the condition that the third scavenging port 61 is supplied with air, the first scavenging port 41 is supplied with air, and the second scavenging port 51 is discharged with the same pressure at the two points, the acting force of the gas received by the rear end cover 32 (the right area in fig. 1) of the built-in cylinder is ensured to be larger than the acting force of the gas received by the annular region (the left annular area of the first piston 12 in fig. 1), so that the built-in cylinder 3, the second piston 22, the second piston rod 23, the first piston 12 and the first piston rod 13 can be pushed to move integrally toward the side away from the rear end cover 6.
As shown in fig. 1, in one embodiment, the built-in cylinder 3 has a first preset stroke a in the second cylinder 21, the second piston 22 has a second preset stroke B in the built-in cylinder 3, the first piston 12 has a third preset stroke C in the first cylinder 11, and the third preset stroke C is the sum of the first preset stroke a and the second preset stroke B.
When the built-in cylinder 3 travels the first preset stroke a in the second cylinder 21, it will drive the second piston 22 to also travel the first preset stroke a in the second cylinder 21, and the second piston 22 drives the first piston 12 to travel the first preset stroke a in the first cylinder 11 through the second piston rod 23.
When the second piston 22 travels a second preset stroke B in the built-in cylinder 3, the second piston 22 drives the first piston 12 to travel the second preset stroke B in the first cylinder 11 through the second piston rod 23. Therefore, the third preset stroke C of the first piston 12, which can travel in the first cylinder 11, is determined to be the sum of the first preset stroke A and the second preset stroke B, and the expansion and contraction amount of the first piston rod 13 is conveniently controlled.
In one embodiment, referring to fig. 5, when the first scavenging port 41 is filled with air, the second scavenging port 51 is exhausted, and the third scavenging port 61 is exhausted, the first piston 12 and the second piston 22 both move toward the rear end cover 6 until the first piston 12 and the first intermediate end cover 5 are tightly attached, the second piston 22 and the internal cylinder rear end cover 32 are tightly attached, and the internal cylinder rear end cover 32 and the rear end cover 6 are tightly attached.
Referring to fig. 6, when the first transfer ports 41 are supplied with air, the second transfer ports 51 are discharged with air, and the third transfer ports 61 are supplied with air, the built-in cylinder 3 moves the second piston 22 and the first piston 12 integrally toward the front end cover 4 until the built-in cylinder front end cover 31 of the built-in cylinder 3 and the first intermediate end cover 5 come into close contact with each other.
Referring to fig. 7, when the first transfer ports 41 exhaust gas, the second transfer ports 51 intake gas, and the third transfer ports 61 intake gas, the gas entering from the second transfer ports 51 enters the built-in cylinder 3 through the first ventilation line 24, and both the first piston 12 and the second piston 22 move toward the front end cover 4 until the second piston 22 and the built-in cylinder front end cover 31 come into close contact with each other.
That is, the operation of the torch cylinder is as follows:
in the initial state, as shown in fig. 5, the first scavenging port 41 is filled with air, the second scavenging port 51 is exhausted, and the third scavenging port 61 is exhausted, so that the first piston 12 moves toward the first middle end cover 5 or the rear end cover 6 in the first cylinder 11 under the air pressure, and drives the second piston rod 23 and the second piston 22 to move toward the rear end cover 6 until the first piston 12 is tightly attached to the first middle end cover 5, the second piston 22 is tightly attached to the built-in cylinder rear end cover 32, and the built-in cylinder rear end cover 32 is tightly attached to the rear end cover 6. In this process, the external ambient gas enters the second cylinder 21 through the vent hole 52.
When the first preset stroke a is traveled, the first transfer port 41 holds the intake air, the second transfer port 51 holds the exhaust air, and the third transfer port 61 switches from the exhaust air to the intake air, as shown in fig. 6. Under the action of gas pressure, the built-in cylinder 3 moves towards the first middle end cover 5 side, and drives the second piston 22 and the first piston 12 to integrally move towards the front end cover 4 side until the built-in cylinder front end cover 31 of the built-in cylinder 3 is tightly attached to the first middle end cover 5. At this time, the first preset stroke a of travel is completed, and the built-in cylinder 3 cannot move to the front end cover 4 side any more.
When the first preset stroke B is traveled, as shown in fig. 7, the first transfer port 41 is switched from intake to exhaust, the second transfer port 51 is switched from exhaust to intake, and the third transfer port 61 holds intake. The third transfer ports 61 hold the intake air and prevent the internal cylinder 3 from coming into close contact with the first intermediate head cover 5 and moving toward the rear head cover 6 during operation.
The gas introduced from the second transfer port 51 enters the built-in cylinder 3 through the first vent line 24, and at this time, a part of the gas in the first cylinder tube 11 exerts pressure on the first piston 12, and the gas introduced into the built-in cylinder 3 exerts pressure on the second piston 22, and at the same time, both the first piston 12 and the second piston 22 are driven to move toward the front end cover 4 side, and have double acting force until the second piston 22 abuts against the built-in cylinder front end cover 31. At this time, the second preset stroke B is completed, and the second piston 22 cannot move to the front end cover 4 side any more. At the same time, the first piston 12 completes the travel of the third preset stroke C.
Thereafter, the first transfer ports 41 may be reset to intake air, the second transfer ports 51 may be reset to exhaust air, and the third transfer ports 61 may be reset to exhaust air. In the resetting process, the gas in the built-in cylinder 3 enters the first cylinder barrel 11 through the first ventilation pipeline 24 and is finally discharged through the second ventilation 51.
Preferably, as shown in fig. 8-9, a third cylinder 7 is provided between the first cylinder 1 and the second cylinder 2.
The third cylinder 7 includes a third cylinder tube 71, a third piston 72, and a third piston rod 73.
The front end of the third cylinder tube 71 is connected to the first intermediate end cover 5, a second intermediate end cover 76 is arranged between the rear end of the third cylinder tube and the second cylinder tube 21, and a second breathing port 77 for breathing by a cylinder connected to the third cylinder 7 is arranged on the second intermediate end cover 76.
The second piston rod 23 passes through the second intermediate end cap 76 and is connected to the third piston rod 73, and the front end opening 25 of the first vent line 24 is located between the third piston 72 and the second intermediate end cap 76.
The third piston rod 73 passes through the first intermediate end cap 5 and is connected to the first piston rod 13.
A second vent line 74 is provided in the third piston rod 73, said second vent line 74 being in communication with the first vent line 24, the second vent line 74 further being provided with a second vent line opening 75, the second vent line opening 75 being located between the first piston 12 and the first intermediate end cap 5.
By providing the third cylinder 7 between the first cylinder 1 and the second cylinder 2 and providing the second vent line 74 in the third piston rod 73 for communication with the first vent line 24 and the first cylinder 1.
When the second transfer ports 51 are filled, a portion of the air enters the second vent line 24 through the second vent line opening 75, enters the first vent line 24, and enters between the third piston 72 and the second intermediate cover 76 through the front end opening 25 of the first vent line 24, so as to push the third piston 72 to move toward the front side.
A further part of the gas continues through the first ventilation line 24 into the built-in cylinder 3 for pushing the second piston 22 towards the front side.
By such an arrangement, multiple acting forces on the first piston 12 can be achieved, and the welding effect is improved.
Preferably, as shown in fig. 8 to 9, two or more third cylinders 7 are provided between the first cylinder 1 and the second cylinder 2.
A second middle end cover 76 is arranged between any two adjacent third cylinders 7; any adjacent two of the third piston rods 73 are connected, and any adjacent two of the second vent lines 74 are communicated.
In the adjacent two third cylinders 7, the second vent line opening 75 on the second vent line 74 in the third cylinder 7 on the second cylinder 2 side is located between the third piston 72 and the second intermediate head 76 in the third cylinder 7 on the first cylinder 1 side.
In the above-described two or more third cylinders 7, the third piston rod 73 in the third cylinder 7 on the side closer to the first cylinder 1 is connected to the first piston rod 13, and the second passage opening 75 in the second passage 74 in the third cylinder 7 is located between the first piston 12 and the first intermediate head cover 5.
In the two or more third cylinders 7, the third piston rod 73 in the third cylinder 7 on the second cylinder 2 side is connected to the second piston rod 22, and the front end opening 15 of the first ventilation line 14 is located between the third piston 72 and the second intermediate head cover 76 in the third cylinder 7.
Thus, when the second transfer ports 51 are filled, a portion of the gas enters the second vent line 74 through the second vent line opening 75. During the circulation of the gas, a part of the gas enters the corresponding third cylinder 7 through the second vent line opening 75; a further part of the gas continues into the first venting line 24 and through the front opening 25 of the first venting line 24 into the third cylinder 7 connected to the second cylinder 2 for pushing the third piston 72 towards the front side.
The remaining part of the gas continues through the first ventilation line 24 into the built-in cylinder 3 for pushing the second piston 22 towards the front side.
Therefore, the plurality of third air cylinders 7 can provide assistance for the extension of the first piston 12, and the moving effect is improved.
Preferably, as shown in fig. 8-9, when the first transfer ports 41 are in, the second transfer ports 51 are out, and the third transfer ports 61 are out, the first piston 21, the third piston 72, and the second piston 22 all move toward the rear end cover 6 until the first piston 21 and the first intermediate end 5 are closely attached together, the third piston 72 and the second intermediate end cover 76 are closely attached together, the second piston 22 and the built-in cylinder rear end cover 32 are closely attached together, and the built-in cylinder rear end cover 32 and the rear end cover 6 are closely attached together.
When the first transfer ports 41 are supplied with air, the second transfer ports 51 are discharged with air, and the third transfer ports 61 are supplied with air, the built-in cylinder 3 moves the second piston 22, the third piston 72, and the first piston 12 toward the front end cover 4 integrally until the built-in cylinder front end cover 31 of the built-in cylinder 3 and the second intermediate end cover 76 come into close contact with each other.
When the first transfer ports 41 are exhausting, the second transfer ports 51 are intaking, and the third transfer ports 61 are intaking, the gas entering from the second transfer ports 51 enters into the third cylinder 7 through the second ventilation line 74, and the gas entering from the second transfer ports 51 also enters into the built-in cylinder 3 through the first ventilation line 24.
The first piston 12, the third piston 72, and the second piston 22 all move toward the front end cover 4 side until the second piston 22 comes into close contact with the built-in cylinder front end cover 31.
Preferably, the maximum stroke of the third piston 72 in the third cylinder 71 is the sum of the first preset stroke a and the second preset stroke B.
As shown in fig. 10-11, an embodiment of the present invention provides a weld gun cylinder system having a weld gun cylinder as described in any of the previous claims. The gun cylinder system further comprises a gas source 10, a first control valve 81 for controlling the inlet or outlet of the first transfer port 41 and the second transfer port 51 in the welding cylinder, a second control valve 82 for controlling the inlet or outlet of the third transfer port 61 in the welding cylinder, and a gas supply line 9.
The gas source 10 is connected to a first control valve 81 and a second control valve 82 through a gas supply line 9, respectively.
The first control valve 81 is connected to the first transfer port 41 and the second transfer port 51 through two supply lines 9, respectively.
The second control valve 82 is connected to the third transfer port 61 via a supply line 9.
The first transfer ports 41, the second transfer ports 51 and the third transfer ports 61 are controlled by the first control valve 81 and the second control valve 82 for easy control.
Preferably, the first control valve 81 is a two-position five-way valve and the second control valve 82 is a two-position three-way valve.
Preferably, the first control valve 81 controls the intake and exhaust relationships of the first transfer ports 41 and the second transfer ports 51 as follows: when the first transfer ports 41 admit air, the second transfer ports 51 exhaust air; when the first transfer ports 41 are vented, the second transfer ports 51 are vented to ensure that the first piston 12 is able to move within the first cylinder 11 under the influence of gas pressure.
Preferably, the second control valve 82 controls the third transfer ports 61 to hold the charge while the first control valve 81 controls the second transfer ports 51 to charge. When the function of the intake air of the third transfer ports 61 is maintained, the built-in cylinder 3 is brought into close contact with the first intermediate head cover 5 and prevented from moving toward the rear head cover 6 during operation.
The operation method of the welding gun cylinder system is shown in fig. 1-11, and the following steps are provided (the operation steps of the welding gun cylinder system with the third cylinder 7 are the same as the following operation method in the section that only the first cylinder 1 is directly connected and combined with the second cylinder 2, and the third cylinder 7 is not arranged in the middle):
s001: the first transfer ports 41 are controlled to admit air and the second transfer ports 51 to exhaust air by the first control valve 81, and the third transfer ports 61 are controlled to exhaust air by the second control valve 82.
Under the pressure of the gas entering the first cylinder tube 11 through the first transfer ports 41, both the first piston 12 and the second piston 22 move toward the rear end cover until the first piston 11 and the first intermediate end cover 5 are in close contact, the second piston 22 and the built-in cylinder rear end cover 32 are in close contact, and the built-in cylinder rear end cover 32 and the rear end cover 6 are in close contact.
S002: the first transfer ports 41 are held in air and the second transfer ports 51 are exhausted by the first control valve 81, and the third transfer ports 61 are controlled in air by the second control valve 82.
Under the pressure of the gas entering the second cylinder 21 through the third transfer port 61, the built-in cylinder 3 drives the second piston 22 and the first piston 12 to integrally move towards the front end cover 4 side until the built-in cylinder front end cover 31 of the built-in cylinder 3 is tightly attached to the first middle end cover 4.
S003: the first transfer ports 41 are controlled to exhaust air and the second transfer ports 51 are controlled to intake air by the first control valve 81, and the third transfer ports 61 are maintained to intake air by the second control valve 82.
The gas entering from the second transfer ports 51 enters the interior cylinder 3 through the first ventilation line 24.
Both the first piston 12 and the second piston 22 move toward the front end cover 4 under the pressure of the gas entering from the second transfer port 51 until the second piston 22 comes into close contact with the built-in cylinder front end cover 31.
S004: step S001 reset is performed.
In this way, the reciprocating operation can be realized by the first preset stroke a being traveled in step S002, the first preset stroke B being traveled in step S003, and the resetting in step S001.
The first transfer ports 41 are kept charged and the second transfer ports 51 are discharged by the first control valve 81, and the third transfer ports 61 are controlled to switch between discharge and charge by the second control valve 82, so that the first piston 12 and the second piston 22 are driven to reciprocate in a first preset stroke a to meet different requirements.
The third transfer ports 61 are maintained charged by the second control valve 82, the first transfer ports 41 are controlled to switch between exhaust and intake by the first control valve 81, the second transfer ports 51 are controlled to switch between intake and exhaust, and the first and second pistons 12 and 22 are driven to reciprocate over a second predetermined stroke B to meet different requirements.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.
Claims (10)
1. A welding gun cylinder comprises a first cylinder and a second cylinder, wherein the first cylinder comprises a first cylinder barrel, a first piston and a first piston rod, and the second cylinder comprises a second cylinder barrel, a second piston and a second piston rod;
a first middle end cover is arranged between the first cylinder barrel and the second cylinder barrel, the other end of the first cylinder barrel is provided with a front end cover, and the other end of the second cylinder barrel is provided with a rear end cover;
the second piston rod penetrates through the first middle end cover and is connected with the first piston rod;
the second cylinder is also provided with a built-in cylinder in a sliding manner, and the second piston is arranged in the built-in cylinder in a sliding manner;
a first scavenging port for scavenging air of the first cylinder is arranged on the front end cover, a second scavenging port for scavenging air of the first cylinder and a first breathing port for breathing of a cylinder connected with the first cylinder are arranged on the first middle end cover, and a third scavenging port for scavenging air of the second cylinder is arranged on the rear end cover;
the second piston rod is internally provided with a first vent pipeline, the rear end opening of the first vent pipeline is positioned between the second piston and the built-in cylinder rear end cover of the built-in cylinder, and the front end opening of the first vent pipeline is positioned between the first piston and the first middle end cover.
2. The weld gun cylinder according to claim 1, wherein an area of the inner cylinder rear end cap is greater than an area of an annular region formed by the first piston and the first piston rod.
3. The torch cylinder according to claim 1 or 2, wherein the built-in cylinder has a first predetermined stroke in the second cylinder, the second piston has a second predetermined stroke in the built-in cylinder, the first piston has a third predetermined stroke in the first cylinder, and the third predetermined stroke is a sum of the first predetermined stroke and the second predetermined stroke.
4. The weld gun cylinder according to claim 1 or 2, wherein the first and second pistons move toward the rear end cap side during intake of the first transfer port, exhaust of the second transfer port, and exhaust of the third transfer port until the first piston abuts the first middle end cap, the second piston abuts the built-in cylinder rear end cap, and the built-in cylinder rear end cap abuts the rear end cap;
when the first scavenging port is used for air intake, the second scavenging port is used for air exhaust, and the third scavenging port is used for air intake, the built-in cylinder drives the second piston and the first piston to integrally move towards the front end cover side until the built-in cylinder front end cover of the built-in cylinder and the first middle end cover are tightly attached together;
when the first transfer ports exhaust, the second transfer ports intake and the third transfer ports intake, the gas entering from the second transfer ports enters the built-in cylinder through the first ventilation pipeline;
and the first piston and the second piston both move towards the front end cover side until the second piston is tightly attached to the front end cover of the built-in cylinder.
5. The weld gun cylinder according to claim 1, wherein a third cylinder is disposed between the first cylinder and the second cylinder;
the third cylinder comprises a third cylinder barrel, a third piston and a third piston rod;
the front end of the third cylinder barrel is connected to the first middle end cover, a second middle end cover is arranged between the rear end of the third cylinder barrel and the second cylinder barrel, and a second breathing port used for breathing of a cylinder connected with the third cylinder is formed in the second middle end cover;
the second piston rod penetrates through the second middle end cover and is connected with the third piston rod, and the front end opening of the first vent pipeline is positioned between the third piston and the second middle end cover;
the third piston rod penetrates through the first middle end cover and is connected with the first piston rod;
and a second vent pipeline communicated with the first vent pipeline is arranged in the third piston rod, and a second vent pipeline opening is further arranged in the second vent pipeline and is positioned between the first piston and the first middle end cover.
6. The weld gun cylinder according to claim 5, wherein two or more of the third cylinders are provided between the first cylinder and the second cylinder;
a second middle end cover is arranged between any two adjacent third cylinders;
any two adjacent third piston rods are connected, and any two adjacent second vent pipelines are communicated;
in two adjacent third cylinders, the second vent line opening on the second vent line in the third cylinder near the second cylinder side is located between the third piston in the third cylinder near the first cylinder side and the second intermediate end cover;
in the two or more third cylinders, the third piston rod in the third cylinder close to the first cylinder side is connected to the first piston rod, and the second vent line opening in the second vent line in the third cylinder is located between the first piston and the first intermediate end cap;
in the two or more third cylinders, the third piston rod in the third cylinder on the side close to the second cylinder is connected to the second piston rod, and the front end opening of the first ventilation line is located between the third piston in the third cylinder and the second intermediate head cover.
7. The torch cylinder according to claim 5 or 6,
when the first scavenging port is used for air intake, the second scavenging port is used for air exhaust, and the third scavenging port is used for air exhaust, the first piston, the third piston and the second piston all move towards the rear end cover side until the first piston is tightly attached to the first middle end cover, the third piston is tightly attached to the second middle end cover, the second piston is tightly attached to the rear end cover of the built-in cylinder, and the rear end cover of the built-in cylinder is tightly attached to the rear end cover;
when the first scavenging port is used for air intake, the second scavenging port is used for air exhaust, and the third scavenging port is used for air intake, the built-in cylinder drives the second piston, the third piston and the first piston to integrally move towards the front end cover side until the built-in cylinder front end cover of the built-in cylinder is tightly attached to the second middle end cover;
when the first scavenging port exhausts, the second scavenging port admits and the third scavenging port admits, the gas entering from the second scavenging port enters the third cylinder through the second vent line, and the gas entering from the second scavenging port also enters the built-in cylinder through the first vent line;
the first piston, the third piston and the second piston all move towards the front end cover side until the second piston is tightly attached to the front end cover of the built-in cylinder.
8. A weld gun cylinder system having a weld gun cylinder according to any one of claims 1 to 7, further comprising a gas source, a first control valve for controlling the intake or exhaust of the first and second transfer ports in the weld cylinder, a second control valve for controlling the intake or exhaust of the third transfer port in the weld cylinder, and a gas supply line;
the air source is connected with the first control valve and the second control valve through one air supply pipeline respectively;
the first control valve is respectively connected with the first scavenging port and the second scavenging port through the two air supply pipelines;
the second control valve is connected to the third transfer port via one of the supply lines.
9. The weld gun cylinder system according to claim 8, wherein the first control valve controls the first transfer port and the second transfer port in an intake-exhaust relationship as follows:
the second transfer ports exhaust when the first transfer ports admit air;
the second transfer ports admit air when the first transfer ports exhaust.
10. The weld gun cylinder system according to claim 9, wherein the second control valve controls the third transfer port to remain charged while the first control valve controls the second transfer port to be charged.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510757296.6A CN106678115B (en) | 2015-11-09 | 2015-11-09 | Welding gun cylinder and welding gun cylinder system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510757296.6A CN106678115B (en) | 2015-11-09 | 2015-11-09 | Welding gun cylinder and welding gun cylinder system |
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| CN106678115A CN106678115A (en) | 2017-05-17 |
| CN106678115B true CN106678115B (en) | 2020-01-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109838611B (en) * | 2019-01-21 | 2020-03-27 | 浙江中孚流体机械有限公司 | Double-piston type feedback cylinder with manual valve |
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| CN202894556U (en) * | 2012-07-25 | 2013-04-24 | 深圳市鸿栢科技实业有限公司 | Arcing stud welding gun driven by linear motor |
| CN203636241U (en) * | 2013-11-28 | 2014-06-11 | 北斗（广州）汽车装备有限公司 | Multipoint special welding machine |
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|---|---|---|---|---|
| WO1998051945A1 (en) * | 1997-05-09 | 1998-11-19 | Structo Ab | Hydraulic cylinder mechanism |
| CN1372083A (en) * | 2001-02-23 | 2002-10-02 | 速睦喜股份有限公司 | Work piece high-speed pressurization method using cylinder with buffer mechanism and mechanism thereof |
| CN1676949A (en) * | 2004-03-30 | 2005-10-05 | Smc株式会社 | Air servo cylinder |
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| CN106678115A (en) | 2017-05-17 |
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