CN112594248A - Cylinder device for manual resistance spot welding pliers and working method - Google Patents

Abstract

The invention relates to an air cylinder device for a manual resistance spot welding clamp and a working method, wherein the air cylinder device comprises a first air cylinder and a second air cylinder; an inner cylinder assembly is arranged in the second cylinder; the inner cylinder barrel assembly comprises an inner cylinder barrel, a second piston rod, an inner cylinder barrel piston, a clamping piece structure and an end cover assembly, a first gap is formed between the inner cylinder barrel and the second cylinder, and a gas flowing space is formed in the first gap; an end cover assembly is installed at an opening of the inner cylinder barrel, a fourth air passage is arranged on the end cover assembly, and a clamping piece structure is installed on the inner cylinder barrel at a position close to the end cover assembly; a fifth air passage is arranged on the inner cylinder barrel; after the end cover assembly abuts against the bottom of the second cylinder, the clamping piece structure is sleeved on the inner cylinder barrel piston; the invention has simple structure, improves the working safety and stability of the welding tongs, and has smaller volume and weight.

Description

Cylinder device for manual resistance spot welding pliers and working method

Technical Field

The invention belongs to the field of welding, and particularly relates to a power output device-air cylinder for manual resistance spot welding equipment and a working method thereof.

Background

In the technical field of resistance welding, the cylinder auxiliary stroke mainly adopted in the prior art generally does not have a mechanical locking block structure and a locking function, and the problem that welding spots are unqualified due to movable arm position movement caused by the factors such as large movable arm mass, unstable gas source and the like may exist during welding.

Disclosure of Invention

The invention provides an auxiliary stroke device with a mechanical lock block structure, which is safer and more stable in operation in the working process, and the technical scheme for realizing the purpose is as follows:

a cylinder device for manual resistance spot welding tongs comprises a first cylinder and a second cylinder, wherein the first cylinder is connected with the second cylinder;

an inner cylinder assembly is arranged in the second cylinder; the inner cylinder barrel assembly comprises an inner cylinder barrel, a second piston rod, an inner cylinder barrel piston, a clamping piece structure and an end cover assembly; an end cover assembly is installed at an opening at the tail part of the inner cylinder barrel, the inner cylinder barrel is sealed by the end cover assembly, and a clamping piece structure is installed on the inner cylinder barrel at a position close to the end cover assembly;

the first piston rod penetrates through the first air cylinder and then is inserted into the piston of the inner cylinder barrel, the first piston rod is fixedly connected with the inner cylinder barrel at the same time, and the first piston rod pushes the inner cylinder barrel and the piston of the inner cylinder barrel to move; the second piston rod penetrates through the second cylinder barrel, the end cover assembly and the clamping piece structure and then is connected with the inner cylinder barrel piston;

and after the end cover assembly abuts against the bottom of the second cylinder, the clamping piece structure is sleeved on the inner cylinder barrel piston.

Optionally, a first air passage is arranged in the axial direction of the first piston rod, and a second air passage and a third air passage are arranged on the first cylinder; the second air passage is communicated with the first air passage; the third air passage is communicated with the first cylinder barrel, a piston ring is sleeved on the first piston rod, and the piston ring moves along with the first piston rod.

Optionally, a connecting block is arranged between the first cylinder and the second cylinder; a fourth air passage and a fifth air passage are arranged on the connecting block, and the fourth air passage is communicated with the second cylinder; the fifth air passage is communicated with the first air cylinder.

Optionally, a sixth air passage is arranged on the inner cylinder barrel, a first gap is formed between the inner cylinder barrel and the second cylinder, the first gap forms an air flowing space, and the sixth air passage is communicated with the first gap.

Optionally, a seventh air channel is arranged on the end cover assembly; the inner cylinder barrel is provided with a first insertion hole, the clamping piece structure is contained in the first insertion hole, and the seventh air passage is communicated with the first insertion hole.

Optionally, an eighth air passage is arranged at the bottom of the second cylinder, and the eighth air passage is communicated with the second cylinder.

Optionally, the structure comprises two locking blocks, two plungers and a plurality of springs; and a second insertion hole is formed in each locking block, the plunger is inserted into the second insertion hole, the second piston rod penetrates through the space between the two locking blocks, and a spring is arranged between the locking blocks.

Optionally, the end cap assembly comprises a first end cap; and the first end cover is provided with a one-way valve.

Optionally, the check valve comprises a pressing block and a plug; the first end cover is provided with a plurality of third jacks, a pressing block is arranged in each third jack in a matched mode, the pressing block is provided with an exhaust groove, and a plug is placed in the exhaust groove.

Optionally, one end of the first cylinder is of an open structure, and a second end cover is mounted on the opening; the protective cover is arranged on the outer side of the second end cover, a first piston rod exposed out of the first cylinder is contained in the protective cover, a second gap is formed between the protective cover and the first piston rod, and compressed air enters the first air channel along the second air channel and the second gap.

The working method of the device of the invention is as follows:

(1) firstly, compressed air enters from the second air passage 11, and enters the first air passage through the second gap, the compressed air pushes the inner cylinder piston to move forwards, and the inner cylinder piston pushes the second piston rod to move;

(2) when the inner cylinder barrel piston moves to the position of the locking block, the inner cylinder barrel piston jacks up the locking block, at the moment, compressed air flows into the plunger through the sixth air passage to push the plunger to drive the locking block to move towards the inner cylinder barrel piston and clamp the inner cylinder barrel piston; during welding, compressed air enters from the third air passage and the fourth air passage simultaneously to push the first push rod and the inner cylinder barrel to move forwards together, so that the action of a welding stroke is completed;

(3) after welding is finished, compressed air enters from the fifth air passage to push the piston ring to drive the first push rod and the inner cylinder barrel to return together;

(4) and finally, compressed air enters from the eighth air passage, the compressed air pushes the plunger piston through the seventh air passage, and after the plunger piston is jacked up, the compressed air enters the inner cylinder barrel to push the piston of the inner cylinder barrel to return to the initial position, so that the auxiliary stroke action is completed.

The invention has simple structure, improves the working safety and stability of the welding tongs, and has smaller integral volume and weight.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an internal schematic view of the present invention;

FIG. 2 is another schematic view of the present invention;

FIG. 3 is a perspective view of the fastener structure;

FIG. 4 is an overall schematic view of the present invention;

FIG. 5 is a schematic view of a check valve of the present invention;

FIG. 6 is a schematic diagram of the plunger of the present invention after being jacked up;

FIG. 7 is a schematic view of the internal structure of the multi-stage supercharging cylinder according to the present invention;

FIG. 8 is a flow chart of a welding process;

FIG. 9 is an enlarged view of a portion of FIG. 8;

FIG. 10 is an enlarged view of a portion of FIG. 8;

description of the figures: the device comprises a first air cylinder 1, a second air passage 11, a third air passage 111, a second end cover 12, a second air cylinder 2, an inner cylinder 20, a second piston rod 21, an inner cylinder piston 22, a sixth air passage 23, a seventh air passage 24, an eighth air passage 25, a locking block 26, two plungers 27, a plurality of springs 28, a first end cover 29, a first piston rod 3, a first air passage 31, a piston ring 32, a shaft retainer ring 4, a sealing ring 5, a cushion pad 6, a limiting block 7, a connecting block 8, a fourth air passage 81, a fifth air passage 82, a screw 9, a screw 10 and a protective cover 13;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. At least one embodiment of the present invention provides the following technical solutions:

in fig. 1-7, a cylinder device for a manual resistance spot welding clamp comprises a first cylinder 1 and a second cylinder 2, wherein the first cylinder 1 is connected with the second cylinder 2; the compressed air is transferred through the first cylinder 1 to the second cylinder 2, which may be provided by a high pressure pump or a compression pump. Preferably the first cylinder 1 is a supercharge cylinder for supercharging.

An inner cylinder assembly is arranged in the second cylinder 2; the inner cylinder barrel assembly comprises an inner cylinder barrel 20, a second piston rod 21, an inner cylinder barrel piston 22, a clamping piece structure and an end cover assembly; an end cover assembly is arranged at an opening at the tail part of the inner cylinder barrel 20, the inner cylinder barrel 20 is sealed by the end cover assembly, and a clamping piece structure is arranged on the inner cylinder barrel 20 at a position close to the end cover assembly;

the first piston rod 3 penetrates through the first air cylinder 1 and then is movably inserted into the inner cylinder barrel piston 22, meanwhile, the first piston rod 3 is fixedly connected with the inner cylinder barrel 20, and the first piston rod 3 pushes the inner cylinder barrel 20 and the inner cylinder barrel piston 22 to move; the second piston rod 3 penetrates through the second cylinder barrel 2, the end cover assembly and the clamping piece structure and then is connected with the inner cylinder barrel piston 22; when the end cover assembly is abutted against the bottom of the second cylinder 2 (the position far away from the first cylinder), the clamping piece structure is sleeved on the inner cylinder piston. The clamping piece structure clamps the inner cylinder piston 22, and during welding, the inner cylinder piston is prevented from retreating or shaking, so that the welding quality is improved.

As an option, a first air passage 31 is arranged in the axial direction of the first piston rod 3, a second air passage 11 and a third air passage 111 are arranged on the first cylinder; the second air passage 11 is communicated with the first air passage 31, and the third air passage 111 is communicated with the first cylinder 1. Compressed air enters the first air passage 31 through the second air passage 11, the air coming out of the first air passage 31 pushes the inner cylinder piston 22 to move, and the inner cylinder piston 22 drives the second piston rod 3 to move for welding;

the piston ring 32 is sleeved on the first piston rod 3, compressed air enters the first cylinder barrel 1 through the third air passage 111 to push the piston ring 32, and the piston ring 32 moves back and forth along the first cylinder 1 along with the first piston rod 3; two sides of the piston ring 32 can be fixed on the first piston rod 3 through a retaining ring 4 for a shaft, and the piston ring 32 is provided with a sealing ring 5 to keep the sealing performance between the piston ring 32 and the first cylinder 1;

as an option, one end of the first cylinder 1 is of an open structure, a second end cover 12 is mounted on the opening, and the second air duct 11 is arranged on the second end cover 12;

as a preferable mode, a cushion pad 6 is installed between the piston ring 32 and the second end cap 12 to relieve the impact on the second end cap 12 when the piston ring 32 moves reversely;

alternatively, one end of the first piston rod 3 inserted into the inner cylinder piston 22 is provided with a stopper 7, such as a lock nut, by which the first piston rod 3 and the inner cylinder 20 are fixed together.

As an option, a connecting block 8 is arranged between the first cylinder 1 and the second cylinder 2, the connecting block 8 is used as a transition part of the first cylinder 1 and the second cylinder 2, and meanwhile, the connecting block 8 seals openings of the first cylinder 1 and the second cylinder 2, and preferably, the first cylinder 1 and the second cylinder 2 are further fixedly connected through a plurality of screws 9; a fourth air channel 81 and a fifth air channel 82 are arranged on the connecting block 8, and the fourth air channel 81 is communicated with the interior of the second cylinder 2; the fifth air passage 82 communicates with the interior of the first cylinder 1.

Compressed air enters the first air passage 31 from the second air passage 11, the compressed air coming out of the first air passage 31 pushes the inner cylinder piston 22 to move, meanwhile, the compressed air coming in from the third air passage 111 also pushes the piston ring 32 to move, the piston ring 32 moves synchronously along with the first piston rod 3, the piston ring 32 pushes the compressed air inside the first air cylinder 1 into the second air cylinder 2 through the fourth air passage 81, and the first piston rod 3 pushes the inner cylinder 20 to move forwards.

Preferably, a buffer pad 6 is also arranged between the inner cylinder barrel 20 and the connecting block 8, so that the impact force of the inner cylinder barrel 20 on the connecting block 8 is relieved, and the buffer between the two cylinders is indirectly reduced.

As an option, a sixth air channel 23 is arranged on the inner cylinder 20, a first gap is formed between the inner cylinder 20 and the second cylinder 2, the first gap forms an air flowing space, and the sixth air channel 23 is communicated with the first gap;

in the invention, the end cover assembly is provided with a seventh air channel 24; the inner cylinder barrel 20 is provided with a first insertion hole, the clamping piece structure is accommodated in the first insertion hole, and the seventh air passage 24 is communicated with the first insertion hole.

And an eighth air passage 25 is arranged at the bottom of the second cylinder 2, and the eighth air passage 25 is communicated with the inside of the second cylinder 2.

As an option, the clip structure comprises two locking blocks 26, two plungers 27, and a plurality of springs 28; each locking piece 26 is provided with a second insertion hole, the bottom of the plunger 27 is inserted into the second insertion hole in a matching manner, the second piston rod 22 penetrates through the space between the two locking pieces 26, a spring 28 is arranged between the two locking pieces 26, and the spring 28 is compressed by the locking pieces 26 under the condition of non-work. Preferably, the second insertion hole is a screw hole, and the bottom of the plunger 27 is of a threaded structure;

as a preferable mode, the first jack is of a stepped structure, the plunger 27 is of a matched stepped structure, when compressed air enters the second air cylinder 2 from the eighth air passage 25, the compressed air pushes up the plunger 27 along the seventh air passage 24, so that the lock block 26 is separated from the inner cylinder piston 22, and the inner cylinder piston 22 can retract along with the second piston rod 21;

as an option, the end cap assembly comprises a first end cap 29, the first end cap 29 being fastened to the bottom of the inner cylinder 20 by means of screws 10; the first end cap 29 is provided with a one-way valve.

As shown in fig. 3 and 5, the check valve includes a pressing block 200 and a plug 201; the first end cover 29 is provided with a plurality of third insertion holes 202, a press block 200 is installed in each third insertion hole 202 in a matching manner, an exhaust groove is formed in the press block 200, a plug 201 is placed in the exhaust groove, and the plug 201 can be a steel ball.

The structure of the preferred exhaust groove is a step type or conical structure, so that the steel ball is limited conveniently. The compressed air entering the inner cylinder barrel 20 through the first air passage 31 jacks up the steel balls in the pressing block 200, the exhaust groove is opened, the compressed air can be discharged from the exhaust groove, otherwise, the compressed air enters the second cylinder barrel 2 and pushes the steel balls to block the exhaust groove, so that the air cannot enter the inner cylinder barrel 20, and the space of the inner cylinder barrel 20 is kept sealed.

The sealing ring 5 is arranged at the contact position of the first end cover 29 and the second piston rod 21, and the sealing ring 5 is arranged at the contact position of the first end cover 29 and the second cylinder barrel 2, so that the sealing performance of the space in the second cylinder barrel 2 is kept.

As an option, a protective cover 13 is installed on the outer side of the second end cover 12, the first piston rod 3 exposed outside the first cylinder is accommodated in the protective cover 13, a second gap is formed between the protective cover 13 and the first piston rod 3, and compressed air enters the first air passage 31 along the second air passage 11 and the second gap;

as another option, the free end of the second cylinder 2 is an open structure, a third end cover 203 is installed on the open structure, the eighth air duct 25 is arranged on the third end cover 203, a guide seat 204 is installed on the third end cover 203, and a dust ring 205, a seal ring 5 and a guide sleeve 206 are respectively installed in an inner hole of the guide seat 204, so that chattering is avoided during the movement of the second piston rod 22.

When higher welding pressure is needed, the pressure of compressed air is only increased, the structures of the cylinder barrel and the inner cylinder barrel assembly of the air cylinder are not changed, and convenience is brought to work.

In the invention, the connection of the multi-stage cylinders can be realized, as shown in fig. 7, the number of the first cylinders can be increased for the multi-stage cylinders, so that higher working pressure is realized.

The operation of the apparatus is described as follows:

the device has two strokes, namely an auxiliary stroke and a welding stroke, wherein the auxiliary stroke controls the switching from the maximum opening stroke to the working stroke of the welding tongs, and the welding stroke controls the switching from the working stroke to the closing of the welding tongs.

During operation, compressed air entering from the second air passage 11 enters the first air passage 31 through the second gap, and the compressed air simultaneously pushes the inner cylinder piston 22 to move forwards, so that the second piston rod is pushed to move; when the inner cylinder piston 22 moves to the position of the locking block 26 and jacks up the locking block 26, at the moment, compressed air flows into the plunger 27 through the sixth air channel 23, pushes the plunger 27 to drive the locking block 26 to move towards the inner cylinder piston 22 and blocks the inner cylinder piston 22; during welding, compressed air enters from the third air passage 111 and the fourth air passage 81 at the same time, and pushes the first push rod 3 and the inner cylinder 20 to move forwards together, so that the welding stroke is completed.

After the welding is finished, compressed air enters from the fifth air passage 82, the piston ring 32 is pushed to drive the first push rod 3 and the inner cylinder 20 to return together, finally, the compressed air enters from the eighth air passage 25, the compressed air pushes the plunger 27 to jack up through the seventh air passage 24, then the compressed air enters the inner cylinder 20, the inner cylinder piston 22 is pushed to return to the initial position, and the auxiliary stroke action is finished.

Fig. 8-10 are flow charts of a welding process.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention shall be included in the scope of the present invention.

Claims (10)

1. A cylinder device for a manual resistance spot welding tongs, characterized in that: the air cylinder device comprises a first air cylinder and a second air cylinder, wherein the first air cylinder is connected with the second air cylinder;

an inner cylinder assembly is arranged in the second cylinder; the inner cylinder barrel assembly comprises an inner cylinder barrel, a second piston rod, an inner cylinder barrel piston, a clamping piece structure and an end cover assembly; an end cover assembly is installed at an opening at the tail part of the inner cylinder barrel, the inner cylinder barrel is sealed by the end cover assembly, and a clamping piece structure is installed on the inner cylinder barrel at a position close to the end cover assembly;

the first piston rod penetrates through the first air cylinder and then is inserted into the piston of the inner cylinder barrel, the first piston rod is fixedly connected with the inner cylinder barrel at the same time, and the first piston rod pushes the inner cylinder barrel and the piston of the inner cylinder barrel to move; the second piston rod penetrates through the second cylinder barrel, the end cover assembly and the clamping piece structure and then is connected with the inner cylinder barrel piston;

and after the end cover assembly abuts against the bottom of the second cylinder, the clamping piece structure is sleeved on the inner cylinder barrel piston.

2. A cylinder assembly for a manual resistance spot welder, according to claim 1, characterized in that: a first air passage is arranged in the axial direction of the first piston rod, and a second air passage and a third air passage are arranged on the first cylinder; the second air passage is communicated with the first air passage; the third air passage is communicated with the first cylinder barrel, a piston ring is sleeved on the first piston rod, and the piston ring moves along with the first piston rod.

3. A cylinder assembly for a manual resistance spot welder, according to claim 2, characterized in that: a connecting block is arranged between the first cylinder and the second cylinder; a fourth air passage and a fifth air passage are arranged on the connecting block, and the fourth air passage is communicated with the second cylinder; the fifth air passage is communicated with the first air cylinder.

4. A cylinder device for a manual resistance spot welder according to claim 3, characterized in that: the inner cylinder barrel is provided with a sixth air passage, a first gap is formed between the inner cylinder barrel and the second cylinder, the first gap forms an air flowing space, and the sixth air passage is communicated with the first gap.

5. A cylinder device for a manual resistance spot welding tongs according to claim 4 characterized in that: a seventh air channel is arranged on the end cover assembly; the inner cylinder barrel is provided with a first insertion hole, the clamping piece structure is contained in the first insertion hole, and the seventh air passage is communicated with the first insertion hole.

6. A cylinder arrangement for a manual resistance spot welding tongs according to claim 5 wherein: and an eighth air passage is arranged at the bottom of the second air cylinder and communicated with the second air cylinder.

7. A cylinder assembly for a manual resistance spot welder, according to claim 1, characterized in that: the clamping piece structure comprises two locking blocks, two plungers and a plurality of springs; and a second insertion hole is formed in each locking block, the plunger is inserted into the second insertion hole, the second piston rod penetrates through the space between the two locking blocks, and a spring is arranged between the locking blocks.

8. A cylinder assembly for a manual resistance spot welder, according to claim 1, characterized in that: the end cap assembly comprises a first end cap; the first end cover is provided with a one-way valve; the one-way valve comprises a pressing block and a plug; the first end cover is provided with a plurality of third jacks, a pressing block is arranged in each third jack in a matched mode, the pressing block is provided with an exhaust groove, and a plug is placed in the exhaust groove.

9. A cylinder arrangement for a manual resistance spot welding tongs according to claim 5 wherein: one end of the first cylinder is of an opening structure, and a second end cover is arranged on the opening; the protective cover is arranged on the outer side of the second end cover, a first piston rod exposed out of the first cylinder is contained in the protective cover, a second gap is formed between the protective cover and the first piston rod, and compressed air enters the first air channel along the second air channel and the second gap.

10. The working method of the cylinder device for the manual resistance spot welding tongs is characterized in that: a cylinder assembly comprising a manual resistance spot welder according to any one of claims 1-9;

(1) firstly, compressed air enters from the second air passage 11, and enters the first air passage through the second gap, the compressed air pushes the inner cylinder piston to move forwards, and the inner cylinder piston pushes the second piston rod to move;

(2) when the inner cylinder barrel piston moves to the position of the locking block, the inner cylinder barrel piston jacks up the locking block, at the moment, compressed air flows into the plunger through the sixth air passage to push the plunger to drive the locking block to move towards the inner cylinder barrel piston and clamp the inner cylinder barrel piston; during welding, compressed air enters from the third air passage and the fourth air passage simultaneously to push the first push rod and the inner cylinder barrel to move forwards together, so that the action of a welding stroke is completed;

(3) after welding is finished, compressed air enters from the fifth air passage to push the piston ring to drive the first push rod and the inner cylinder barrel to return together;

(4) and finally, compressed air enters from the eighth air passage, the compressed air pushes the plunger piston through the seventh air passage, and after the plunger piston is jacked up, the compressed air enters the inner cylinder barrel to push the piston of the inner cylinder barrel to return to the initial position, so that the auxiliary stroke action is completed.

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