Pneumatic electrode cap removal device

Abstract

The present invention provides a pneumatic electrode cap disassembly device, which can disassemble the electrode cap from the electrode rod. The device includes a clamping mechanism and an airflow channel, wherein the clamping mechanism can clamp the electrode cap and drive it to rotate, wherein a diverter cone, an impeller and a vortex generator are sequentially arranged in the airflow channel along its extension direction, wherein the vortex generator is connected to an air jet pipe; a hot air flow channel is formed on the outer side of the diverter cone, wherein the hot air flow channel acts on the electrode cap, and a cold air flow channel is formed at the center of the vortex generator, wherein the cold air flow channel acts on the electrode rod; the impeller is transmission-connected to the clamping mechanism, and the impeller can rotate under the action of the airflow in the airflow channel. The present invention can pre-loosen the electrode cap and the electrode rod before formal disassembly, thereby helping the electrode cap and the electrode rod to get rid of the stuck situation, thereby reducing the wear of the electrode rod.

Description

Technical Field

[0001] The invention relates to the technical field of electrode cap disassembly, in particular to a pneumatic electrode cap disassembly device. Background Art

[0002] In the manufacturing industry, spot welding is a common method for connecting parts. As a key consumable part of spot welding, the electrode cap often has welding slag adhesion, oxide layer formation, and excessive wear after long-term use, which increases the resistance of the electrode cap and affects the welding quality. Therefore, the electrode cap with severe wear must be replaced in time.

[0003] The existing electrode cap and electrode rod are generally connected by threads. Therefore, when removing the electrode cap, it is necessary to clamp the electrode cap and drive it to rotate to loosen the threaded connection between the electrode cap and the electrode rod. However, the traditional electrode cap removal device can only perform direct disassembly actions of clamping and rotating. If the electrode cap and the electrode rod are stuck, direct disassembly will aggravate the wear of the electrode rod. When the electrode rod is worn to a certain extent, the electrode cap cannot be tightened on the electrode rod, resulting in the scrapping of the electrode rod. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a pneumatic electrode cap removal device, which can pre-loosen the electrode cap and the electrode rod before formal removal, helping the electrode cap and the electrode rod to get rid of the stuck situation, thereby reducing the wear of the electrode rod.

[0005] The present invention adopts the following technical solutions.

[0006] A pneumatic electrode cap removal device, which can remove the electrode cap from the electrode rod, comprises a clamping mechanism and an air flow channel, wherein the clamping mechanism can clamp the electrode cap and drive it to rotate, and the air flow channel is provided with a splitter cone, an impeller and a vortex generator in sequence along its extension direction, and the vortex generator is connected to an air jet pipe;

[0007] A hot air flow channel is formed on the outer side of the diverter cone, and the hot air flow channel acts on the electrode cap. A cold air flow channel is formed at the center of the vortex generator, and the cold air flow channel acts on the electrode rod.

[0008] The impeller is in transmission connection with the clamping mechanism, and the impeller can rotate under the action of the airflow in the airflow channel.

[0009] Furthermore, the clamping mechanism includes a base and a rotating seat rotatably connected to the base, a clamping cavity is opened at the center of the rotating seat, and a plurality of clamping claws hinged to the rotating seat are evenly distributed on the outside of the clamping cavity, and a clamping part and a transmission part are formed on the clamping claws, and a first driven wheel is rotatably sleeved on the outside of the rotating seat, and a plurality of transmission grooves are evenly opened on the first driven wheel along its circumference, and the transmission part extends into the transmission groove and cooperates with the transmission groove gap.

[0010] Furthermore, a mounting plate is provided on the base, a avoidance cavity for accommodating a rotating seat is formed on the mounting plate, a mounting hole is formed on a side wall of the avoidance cavity, a piston is sealingly and slidably connected in the mounting hole, a friction block is provided at one end of the piston close to the center of the avoidance cavity, and an air pressure pipe is connected to the end of the mounting hole facing away from the center of the avoidance cavity.

[0011] Furthermore, the rotating seat includes a top seat body and a base body which are arranged in parallel, the top seat body and the base body are connected into a whole by bolts, and the clamping claw is arranged between the top seat body and the base body.

[0012] Furthermore, the first driven wheel is transmission-connected to the first driving wheel, the first driving wheel is integrally connected to the second driven wheel via a rotating shaft, the second driven wheel is transmission-connected to the second driving wheel, and the second driving wheel is integrally sleeved on the outer side of the impeller.

[0013] Furthermore, the device also includes a mounting seat, on which a disassembly channel for the electrode cap and the electrode rod to pass through is opened, and the airflow channel coincides with the axis of the disassembly channel and is sleeved on the outside of the disassembly channel;

[0014] The side wall of the disassembly channel is uniformly provided with a plurality of hot air holes connected with the hot air flow channel and a plurality of cold air holes connected with the cold air flow channel along its circumference, and the hot air holes and the cold air holes are staggered in the axial direction of the disassembly channel.

[0015] Furthermore, an air guide channel connecting the cold air flow channel and the cold air hole is provided on the mounting seat.

[0016] Furthermore, a side wall of the disassembly passage is provided with an annular air barrier curtain, and the air barrier curtain is located between the hot air hole and the cold air hole.

[0017] Furthermore, the device also includes a temperature sensor for measuring the temperature of the electrode cap, and a rotation speed sensor for measuring the rotation speed of the first driven wheel.

[0018] Furthermore, the rotating shaft is connected to a motor via an electromagnetic clutch, and the electromagnetic clutch has an engaged state and a disengaged state;

[0019] When the electromagnetic clutch is in an engaged state, power can be transmitted between the motor and the rotating shaft;

[0020] When the electromagnetic clutch is in a disengaged state, power cannot be transmitted between the motor and the rotating shaft.

[0021] The beneficial effects of the present invention are:

[0022] During operation, compressed gas is introduced into the jet pipe, and the compressed gas forms a high-speed rotating airflow in the airflow channel after passing through the vortex generator. Based on the working principle of the vortex tube, the high-speed rotating airflow is separated into an outer layer airflow and a center layer airflow with a temperature difference in the airflow channel, wherein the outer layer airflow has a higher temperature and the center layer airflow has a lower temperature. The outer layer airflow acts on the electrode cap through the hot air flow channel to increase the temperature of the electrode cap; the center layer airflow acts on the electrode rod through the cold air flow channel to reduce the temperature of the electrode rod.

[0023] When the airflow in the airflow channel passes through the impeller, it will exert a force on the impeller. If the electrode cap and the electrode rod are not stuck, the force of the airflow on the impeller enables the clamping mechanism to overcome the locking force between the electrode cap and the electrode rod, thereby performing the disassembly action, and the clamping mechanism will clamp the electrode cap and drive it to rotate. If the electrode cap and the electrode rod are stuck, the force exerted by the airflow on the impeller is not enough to enable the clamping mechanism to overcome the locking force between the electrode cap and the electrode rod, and the clamping mechanism cannot perform the disassembly action. Subsequently, the compressed gas will continue to flow into the airflow channel through the jet pipe, causing the temperature of the electrode cap to continue to rise and the temperature of the electrode rod to continue to decrease. Based on the principle of thermal expansion and contraction, the inner diameter of the electrode cap becomes larger after heating, and the outer diameter of the electrode rod becomes smaller after cooling, thereby increasing the gap between the electrode cap and the electrode rod and reducing the locking force between the two. The locking force between the two is inversely proportional to the temperature difference. When the locking force is reduced to a certain value, the effect of the airflow on the impeller can drive the clamping mechanism to perform the disassembly action.

[0024] It can be seen that the present invention can pre-loosen the electrode cap and the electrode rod before formal disassembly, helping the electrode cap and the electrode rod to get rid of the stuck situation, thereby reducing the wear of the electrode rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0027] Figure 2 is a schematic cross-sectional structural diagram of the clamping mechanism of this embodiment;

[0028] Figure 3is a schematic diagram of the exploded structure of the clamping mechanism of this embodiment;

[0029] Figure 4 is a schematic structural diagram of the impeller and the second driving wheel of this embodiment;

[0030] Figure 5 Schematic diagram of the structure of the vortex generator of this embodiment.

[0031] Description of reference numerals:

[0032] Clamping mechanism 1, base 11, rotating seat 12, clamping claw 13,

[0033] Clamping cavity 12a,

[0034] The top body 121, the base body 122,

[0035] Clamping part 131, transmission part 132,

[0036] Air flow channel 2, hot air flow channel 21, cold air flow channel 22,

[0037] Splitter cone 31, impeller 32, vortex generator 33, jet pipe 34,

[0038] A first driven wheel 41, a first driving wheel 42, a rotating shaft 43, a second driven wheel 44, a second driving wheel 45,

[0039] Transmission slot 411,

[0040] Mounting plate 51, piston 52, friction block 53, air pressure tube 54,

[0041] Mounting seat 6, disassembly channel 61, hot air hole 62, cold air hole 63, air guide channel 64,

[0042] Air curtain 7,

[0043] Temperature sensor 81, speed sensor 82,

[0044] Electromagnetic clutch 91, motor 92. DETAILED DESCRIPTION

[0045] The drawings are only used for illustrative purposes and should not be construed as limitations of this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product.

[0046] For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The technical solution of the present invention is further described below in conjunction with the drawings and embodiments.

[0047] As attached Figures 1 to 5A pneumatic electrode cap removal device is shown, which can remove the electrode cap from the electrode rod. The device comprises a clamping mechanism 1 and an air flow channel 2. The clamping mechanism 1 can clamp the electrode cap and drive it to rotate. A splitter cone 31, an impeller 32 and a vortex generator 33 are sequentially arranged in the air flow channel 2 along its extension direction. The vortex generator 33 is connected to an air jet pipe 34.

[0048] A hot air flow channel 21 is formed on the outer side of the flow dividing cone 31, and the hot air flow channel 21 acts on the electrode cap. A cold air flow channel 22 is formed at the center of the vortex generator 33, and the cold air flow channel 22 acts on the electrode rod.

[0049] The impeller 32 is in transmission connection with the clamping mechanism 1 , and the impeller 32 can rotate under the action of the airflow in the airflow channel 2 .

[0050] During operation, compressed gas is introduced into the injection pipe 34, and the compressed gas passes through the vortex generator 33 to form a high-speed rotating airflow in the airflow channel 2. When the airflow in the airflow channel 2 passes through the impeller 32, it will generate a force on the impeller 32.

[0051] If the electrode cap and the electrode rod are not stuck, the force of the airflow on the impeller 32 enables the clamping mechanism 1 to overcome the locking force between the electrode cap and the electrode rod, thereby performing the disassembly action. The clamping mechanism 1 will clamp the electrode cap and drive it to rotate to achieve the disassembly of the electrode cap.

[0052] If the electrode cap and the electrode rod are stuck, the force exerted by the airflow on the impeller 32 is not enough to enable the clamping mechanism 1 to overcome the locking force between the electrode cap and the electrode rod, and the clamping mechanism 1 cannot perform the disassembly action. At this time, the compressed gas is continuously introduced. Based on the working principle of the vortex tube, the high-speed rotating airflow is separated into an outer layer airflow and a center layer airflow with a temperature difference in the airflow channel 2, wherein the temperature of the outer layer airflow is higher and the temperature of the center layer airflow is lower. The outer layer airflow acts on the electrode cap through the hot air flow channel 21 to increase the temperature of the electrode cap; the center layer airflow acts on the electrode rod through the cold air flow channel 22 to reduce the temperature of the electrode rod. Based on the principle of thermal expansion and contraction, the inner diameter of the electrode cap becomes larger after heating, and the outer diameter of the electrode rod becomes smaller after cooling, thereby increasing the gap between the electrode cap and the electrode rod and reducing the locking force between the two. The locking force between the two is inversely proportional to the temperature difference. With the continuous introduction of compressed gas, the temperature difference between the electrode cap and the electrode rod continues to increase, thereby continuously reducing the locking force between the two. When the locking force is reduced to a certain value, the effect of the airflow on the impeller 32 can drive the clamping mechanism 1 to perform the disassembly action.

[0053] Preferably, the clamping mechanism 1 includes a base 11 and a rotating seat 12 rotatably connected to the base 11, a clamping cavity 12a is opened at the center of the rotating seat 12, and a plurality of clamping claws 13 hinged to the rotating seat 12 are evenly distributed on the outside of the clamping cavity 12a, and a clamping portion 131 and a transmission portion 132 are formed on the clamping claws 13. A first driven wheel 41 is rotatably sleeved on the outer side of the rotating seat 12, and a plurality of transmission grooves 411 are evenly opened on the first driven wheel 41 along its circumference, and the transmission portion 132 extends into the transmission groove 411 and is gap-matched with the transmission groove 411.

[0054] Specifically, as attached Figure 2 As shown, in the initial state of the clamping mechanism 1, the clamping portion 131 of the clamping jaw 13 is located outside the clamping cavity 12a. When the electrode cap needs to be removed, the first driven wheel 41 rotates clockwise. Initially, the first driven wheel 41 rotates relative to the rotating seat 12. Under the cooperation of the transmission groove 411 and the transmission portion 132, the clamping jaw 13 rotates clockwise around its own hinge axis, so that the clamping portion 131 on the clamping jaw 13 approaches the center of the clamping cavity 12a, until the clamping portion 131 on the clamping jaw 13 is pressed against the electrode cap in the clamping cavity 12a, thereby achieving the clamping of the electrode cap. When the clamping jaw 13 clamps the electrode cap, the first driven wheel 41 and the rotating seat 12 cannot rotate relative to each other. In this way, the first driven wheel 41 that continues to rotate clockwise will drive the rotating seat 12 and the clamped electrode cap to rotate clockwise, thereby achieving the removal of the electrode cap.

[0055] It is understandable that the electrode cap that has just been removed will still be clamped by the clamp 13. At this time, the clamp 13 needs to be rotated counterclockwise around its own hinge axis to release the clamped electrode cap. However, if the first driven wheel 41 and the rotating seat 12 are locked at this time, the first driven wheel 41 and the rotating seat 12 cannot rotate relative to each other, and the electrode cap cannot be released. To solve this problem, preferably, a mounting plate 51 is provided on the base 11, and a avoidance cavity for accommodating the rotating seat 12 is provided on the mounting plate 51, and a mounting hole is provided on the side wall of the avoidance cavity, and a piston 52 is sealingly and slidably connected in the mounting hole, and a friction block 53 is provided at one end of the piston 52 close to the center of the avoidance cavity, and an air pressure tube 54 is connected to the end of the mounting hole facing away from the center of the avoidance cavity.

[0056] Specifically, after the electrode cap is removed from the electrode rod, the pneumatic tube 54 is connected to positive pressure, and the piston 52 pushes the friction block 53 against the rotating seat 12 to limit the rotation of the rotating seat 12. Then, the first driven wheel 41 rotates counterclockwise, so that the first driven wheel 41 and the rotating seat 12 rotate relative to each other. Under the cooperation of the transmission groove 411 and the transmission part 132, the clamping jaw 13 also rotates counterclockwise around its own hinge axis, so that the clamping part 131 on the clamping jaw 13 is away from the center of the clamping cavity 12a to release the clamped electrode cap. When the clamping mechanism 1 returns to the initial state, negative pressure is introduced into the pneumatic tube 54, and then the removal of the next electrode cap can be continued.

[0057] Preferably, as attached Figure 3 As shown, the rotating seat 12 includes a top seat body 121 and a base body 122 which are arranged in parallel. The top seat body 121 and the base body 122 are connected into a whole by bolts, and the clamping jaw 13 is arranged between the top seat body 121 and the base body 122.

[0058] Preferably, the first driven wheel 41 is connected to the first driving wheel 42 in a transmission manner, the first driving wheel 42 is integrally connected to the second driven wheel 44 through the rotating shaft 43, the second driven wheel 44 is connected to the second driving wheel 45 in a transmission manner, and the second driving wheel 45 is integrally sleeved on the outer side of the impeller 32. In this embodiment, the first driven wheel 41, the first driving wheel 42, the second driven wheel 44 and the second driving wheel 45 are all gears. When the compressed gas is introduced into the jet pipe 34, a high-speed rotating airflow is formed in the airflow channel 2. When the airflow passes through the impeller 32, a force is exerted on the impeller 32. If not affected by other external forces, the impeller 32 will drive the first driven wheel 41 to rotate through the second driving wheel 45, the second driven wheel 44, the rotating shaft 43 and the first driving wheel 42 in sequence.

[0059] Preferably, the device further comprises a mounting seat 6, on which a disassembly channel 61 is provided for the electrode cap and the electrode rod to pass through, and the airflow channel 2 coincides with the axis of the disassembly channel 61 and is sleeved on the outside of the disassembly channel 61;

[0060] The side wall of the disassembly channel 61 is evenly distributed along its circumference with a plurality of hot air holes 62 communicating with the hot air flow channel 21, and a plurality of cold air holes 63 communicating with the cold air flow channel 22, and the hot air holes 62 and the cold air holes 63 are staggered in the axial direction of the disassembly channel 61. It can be understood that the hot air holes 62 and the cold air holes 63 are evenly distributed along the circumference of the disassembly channel 61, which helps to evenly heat the electrode cap and evenly cool the electrode rod.

[0061] In order to increase the temperature difference between the electrode cap and the electrode rod at the socket joint, the cold air hole 63 needs to be set at a position close to the hot air hole 62. For this purpose, preferably, the mounting seat 6 is provided with an air guide channel 64 connecting the cold air flow channel 22 and the cold air hole 63, and the cold air discharged from the cold air flow channel 22 is guided to the cold air hole 63 through the air guide channel 64.

[0062] In order to avoid the phenomenon of air leakage between the hot air hole 62 and the cold air hole 63, which leads to the reduction of the heating efficiency of the electrode cap and the cooling efficiency of the electrode rod, preferably, the side wall of the disassembly channel 61 is provided with an annular air curtain 7, and the air curtain 7 is located between the hot air hole 62 and the cold air hole 63. During the disassembly of the electrode cap, the air curtain 7 is tightly sleeved on the outer side of the electrode rod, thereby avoiding the phenomenon of air leakage between the hot air hole 62 and the cold air hole 63.

[0063] Preferably, the device further includes a temperature sensor 81 for measuring the temperature of the electrode cap, and a rotation speed sensor 82 for measuring the rotation speed of the first driven wheel 41 .

[0064] Preferably, the rotating shaft 43 is connected to the motor 92 via an electromagnetic clutch 91, and the electromagnetic clutch 91 has an engaged state and a disengaged state;

[0065] When the electromagnetic clutch 91 is in the engaged state, power can be transmitted between the motor 92 and the rotating shaft 43;

[0066] When the electromagnetic clutch 91 is in the disengaged state, power cannot be transmitted between the motor 92 and the rotating shaft 43 .

[0067] Specifically, when the impeller 32 drives the first driven wheel 41 to rotate clockwise, the electromagnetic clutch 91 is in a disengaged state, and the rotation of the rotating shaft 43 is not affected by the motor 92. When the clamped electrode cap needs to be released, the electromagnetic clutch 91 is in an engaged state, and the motor 92 drives the first driven wheel 41 to rotate counterclockwise through the rotating shaft 43 and the first driving wheel 42 in turn.

[0068] It is understandable that if the electrode cap and the electrode rod are stuck, firstly, a certain amount of compressed gas is continuously introduced to generate a temperature difference between the electrode cap and the electrode rod to try to remove the electrode cap. However, if the temperature difference between the electrode cap and the electrode rod has reached the limit, the force exerted by the airflow on the impeller 32 is still insufficient for the first driven wheel 41 to overcome the locking force between the electrode cap and the electrode rod. In this case, the introduction of compressed gas can be stopped, and the electromagnetic clutch 91 can be switched to the engaged state. Then, the large torque generated by the motor 92 directly drives the first driven wheel 41 to rotate, so as to violently remove the electrode cap.

[0069] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A pneumatic electrode cap removal device, which can remove the electrode cap from the electrode rod, characterized in that: The device comprises a clamping mechanism and an air flow channel, wherein the clamping mechanism can clamp the electrode cap and drive it to rotate, and the air flow channel is provided with a splitter cone, an impeller and a vortex generator in sequence along its extension direction, and the vortex generator is connected to an air jet pipe; A hot air flow channel is formed on the outer side of the diverter cone, and the hot air flow channel acts on the electrode cap. A cold air flow channel is formed at the center of the vortex generator, and the cold air flow channel acts on the electrode rod. The impeller is in transmission connection with the clamping mechanism, and the impeller can rotate under the action of the airflow in the airflow channel; The device also includes a mounting seat, on which a disassembly channel for the electrode cap and the electrode rod to pass through is opened, and the airflow channel coincides with the axis of the disassembly channel and is sleeved on the outside of the disassembly channel; The side wall of the disassembly channel is uniformly provided with a plurality of hot air holes connected with the hot air flow channel and a plurality of cold air holes connected with the cold air flow channel along its circumference, and the hot air holes and the cold air holes are staggered in the axial direction of the disassembly channel.

2. A pneumatic electrode cap removal device according to claim 1, characterized in that: The clamping mechanism includes a base and a rotating seat rotatably connected to the base, a clamping cavity is opened at the center of the rotating seat, and a plurality of clamping claws hinged to the rotating seat are evenly distributed on the outside of the clamping cavity, and a clamping part and a transmission part are formed on the clamping claws, and a first driven wheel is rotatably sleeved on the outside of the rotating seat, and a plurality of transmission grooves are evenly opened on the first driven wheel along its circumference, and the transmission part extends into the transmission groove and cooperates with the transmission groove gap.

3. A pneumatic electrode cap removal device according to claim 2, characterized in that: The base is provided with a mounting plate, on which a avoidance cavity for accommodating a rotating seat is opened, a mounting hole is opened on the side wall of the avoidance cavity, a piston is sealingly and slidably connected in the mounting hole, a friction block is provided at one end of the piston close to the center of the avoidance cavity, and an air pressure pipe is connected to the end of the mounting hole facing away from the center of the avoidance cavity.

4. A pneumatic electrode cap removal device according to claim 2, characterized in that: The rotating seat comprises a top seat body and a base body which are arranged in parallel. The top seat body and the base body are connected into a whole through bolts. The clamping claw is arranged between the top seat body and the base body.

5. The pneumatic electrode cap removal device according to claim 2, characterized in that: The first driven wheel is transmission-connected with the first driving wheel, the first driving wheel is integrally connected with the second driven wheel via a rotating shaft, the second driven wheel is transmission-connected with the second driving wheel, and the second driving wheel is integrally sleeved on the outer side of the impeller.

6. The pneumatic electrode cap removal device according to claim 1, characterized in that: The mounting seat is provided with an air guide channel connecting the cold air flow channel and the cold air hole.

7. The pneumatic electrode cap removal device according to claim 1, characterized in that: The side wall of the disassembly passage is provided with an annular air-blocking curtain, and the air-blocking curtain is located between the hot air hole and the cold air hole.

8. The pneumatic electrode cap removal device according to claim 5, characterized in that: The device also includes a temperature sensor for measuring the temperature of the electrode cap and a rotation speed sensor for measuring the rotation speed of the first driven wheel.

9. The pneumatic electrode cap removal device according to claim 8, characterized in that: The rotating shaft is connected to a motor via an electromagnetic clutch, and the electromagnetic clutch has an engaged state and a disengaged state; When the electromagnetic clutch is in an engaged state, power can be transmitted between the motor and the rotating shaft; When the electromagnetic clutch is in a disengaged state, power cannot be transmitted between the motor and the rotating shaft.

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