CN113977167A

CN113977167A - Welding device for machining

Info

Publication number: CN113977167A
Application number: CN202111277013.XA
Authority: CN
Inventors: 张立苗
Original assignee: Yiwu Zemu Industrial Product Design Co ltd
Current assignee: Yiwu Zemu Industrial Product Design Co ltd
Priority date: 2021-10-30
Filing date: 2021-10-30
Publication date: 2022-01-28

Abstract

The invention relates to the field of machining, in particular to a welding device for machining, which comprises a workbench, an upper chuck and a lower chuck which are coaxially arranged above the workbench, wherein a plurality of gettering holes are uniformly and circumferentially arranged in the lower chuck, a gas flow sensor is arranged in each gettering hole and used for detecting the gas flow velocity in each gettering hole, an upper rotating shaft is welded at the upper middle shaft of the upper chuck, a lower rotating shaft is welded at the lower middle shaft of the lower chuck, and a negative pole ring is sleeved on each lower rotating shaft. According to the invention, the fourth hydraulic cylinder clamps two workpieces, the first polishing block and the welding seam polishing head not only realize the positioning of the disc-shaped workpiece, but also can polish the welding position and polish the welding seam, the welding positions are accurately adjusted by the three axial hydraulic cylinders, the welding quality is improved, the air suction pump not only can effectively fix the bottom of the disc-shaped workpiece and the lower chuck, but also can effectively absorb waste scraps and waste gases generated by polishing and welding, and the environment pollution is avoided.

Description

Welding device for machining

Technical Field

The invention relates to the field of machining, in particular to a welding device for machining.

Background

Electric welding refers to a welding process that achieves atomic bonding of a weldment using electric energy, by applying heat or pressure, or both, with or without filler material. The processing equipment used for electric welding is called an electric welding machine.

The manual work of present electric welding many needs operates, nevertheless carries out simple mechanized welding operation, especially when welding disc spare, can select the machine to replace artifically, when reduce cost, avoids manual welding to need constantly to rotate and carry out the fortune strip, especially discoid work piece, and the operation degree of difficulty is great.

Toxic waste gas and the like generated by welding can avoid diseases such as pneumoconiosis and the like caused by manual long-term welding operation, and is more beneficial to the development and progress of the society.

Meanwhile, the disc-shaped workpiece needs to be positioned before welding, so that the disc-shaped workpiece and the clamping piece are in the same axial center position when the disc-shaped workpiece rotates, and the workpiece is prevented from being damaged during welding.

And finally, polishing the welding position of the workpiece before welding, polishing a welding seam at the welding position before welding so as to facilitate welding, and cleaning welding slag after welding.

Disclosure of Invention

The invention aims to provide a welding device for machining, which solves the problems that the operation difficulty is high when workers are engaged in welding operation for a long time, the environment and the body health are polluted by waste scraps and waste gas, the accurate positioning of a welding position, the grinding of a welding seam and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

a welding device for machining comprises a workbench, an upper chuck plate and a lower chuck plate which are coaxially arranged above the workbench, and a controller arranged at the top of the workbench, wherein a plurality of gettering holes are drilled in the lower chuck plate in an even circumferential array manner, a gas flow sensor is arranged in each gettering hole and used for detecting the gas flow velocity in each gettering hole, an upper rotating shaft is welded at the upper middle shaft of the upper chuck plate, a lower rotating shaft is welded at the lower middle shaft of the lower chuck plate, a negative pole ring is sleeved on each lower rotating shaft, fixing frames in a U-shaped structure are arranged on the outer sides of the upper chuck plate and the lower chuck plate, two ends of each fixing frame are rotatably connected with the upper rotating shaft and the lower rotating shaft through bearings, a first hydraulic cylinder is arranged on the upper end face of the workbench, a second hydraulic cylinder is arranged at the output end of the first hydraulic cylinder, a third hydraulic cylinder is arranged at the output shaft of the second hydraulic cylinder, and a chuck is arranged at the output shaft of the third hydraulic cylinder, the clamping head clamps the welding rod;

workstation up end one side is equipped with first slide bar, and the sliding sleeve has the sliding block on the first slide bar, sliding block one side is equipped with first electric telescopic handle, and first electric telescopic handle's output is equipped with first sanding block, the workstation top is equipped with the second slide bar with the position that first slide bar is relative, sliding sleeve has electric slider on the second slide bar, one side of electric slider is equipped with second electric telescopic handle, second electric telescopic handle's output is equipped with the second sanding block, the horizontal axis department of second sanding block is equipped with the welding seam sanding head, welding seam sanding head tip is equipped with pressure sensor and is used for detecting the pressure value when welding seam sanding head contacts with discoid work piece.

The invention has at least the following beneficial effects:

1. in the invention, the fourth hydraulic cylinder realizes the clamping operation between two workpieces by arranging the upper chuck, the lower chuck, the fourth hydraulic cylinder and other devices, and the servo motor synchronously drives the upper chuck and the lower chuck through the transmission mechanism to realize the rotation operation of the workpieces.

2. According to the invention, through arranging the air pump, the impurity suction holes, the impurity accumulation box, the waste gas recovery cavity and other devices, the air pump fixes the disc-shaped workpiece on the top of the lower chuck plate through suction force and is matched with the fourth hydraulic cylinder to fix the disc-shaped workpiece, and meanwhile, the air pump can also collect waste scraps, waste gas and the like generated in the welding process and the polishing process into the impurity accumulation box and the waste gas recovery cavity along the impurity suction holes, so that the environment is effectively protected, and the influence of toxic substances on the health of workers is prevented.

3. According to the invention, through arranging the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder, the welding rod, the servo motor and the like, the servo motor drives the upper chuck plate and the lower chuck plate to rotate, so as to drive the inner disc-shaped workpiece to rotate, the welding work is decomposed in the rotating process, the welding rod is driven to move in the Z-axis direction only by controlling the first hydraulic cylinder to realize strip conveying, the third hydraulic cylinder moves in the Y-axis direction to realize feeding, the welding angle of the welding rod and the disc-shaped workpiece is controlled in the X-axis direction by the second hydraulic cylinder, the position change of the welding rod is realized through the adjustment of the three axial hydraulic cylinders, so that the welding rod is better contacted with a welding seam, the welding precision is improved, the welding effect is ensured, the welding difficulty is effectively reduced, and the welding quality is improved.

4. According to the invention, through arranging the first slide bar, the slide block, the first electric telescopic rod, the first polishing block and the like, the servo motor rotates at a high speed, and through adjusting the vertical height of the slide block on the first slide bar and synchronously matching with the first electric telescopic rod, the first polishing block is ensured to be attached to the outer wall of the disc-shaped workpiece, so that when the workpiece rotates, the first polishing block polishes the welding position, and the influence of substances such as iron rust and the like on the welding effect is avoided.

5. According to the invention, the second sliding rod, the electric sliding block, the second electric telescopic rod, the second polishing block, the welding seam polishing head and the like are arranged, the welding seam polishing head is matched with the first polishing block and is limited when the disc-shaped workpieces rotate together, so that the disc-shaped workpieces are continuously coaxial with the lower chuck plate, and after the disc-shaped workpieces are positioned coaxially, the welding seam polishing block can polish the connecting position of the two stacked disc-shaped workpieces, so that the welding effect is improved. The device not only can polish to the welding surface of discoid work piece, can also accomplish the work of location and excavation welding seam in step, and it is efficient to polish, fixes a position accurately, for welding next provides fine operational environment and operating condition, guarantees the smooth efficient completion of weldment work on next step.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 shows an isometric view provided in accordance with the present invention;

FIG. 2 illustrates a front view provided in accordance with the present invention;

FIG. 3 illustrates a transmission block diagram provided in accordance with the present invention;

FIG. 4 illustrates an isometric view of an undercarriage pan provided in accordance with the present invention;

FIG. 5 shows a schematic cross-sectional view of the interior of the undercarriage pan and the undercarriage provided in accordance with the present invention;

FIG. 6 illustrates a block diagram of an electric welding mechanism provided in accordance with the present invention;

FIG. 7 illustrates a first grinding mechanism block diagram provided in accordance with the present invention;

figure 8 shows a block diagram of a second grinding mechanism provided in accordance with the present invention.

In the figure: 1. a work table; 2. a chuck is arranged; 3. a lower chuck plate; 4. a fixed mount; 5. an upper rotating shaft; 6. a chute; 7. a driven gear; 8. a synchronous belt; 9. a driving gear; 10. a rotating shaft; 11. a first hydraulic cylinder; 12. a second hydraulic cylinder; 13. a third hydraulic cylinder; 14. a chuck; 15. welding rods; 16. a first slide bar; 17. a slider; 18. a first electric telescopic rod; 19. a lower rotating shaft; 20. a fourth hydraulic cylinder; 21. a negative pole ring; 22. a servo motor; 23. a first sanding block; 24. a bolt; 25. a limiting block; 26. a welding seam polishing head; 27. a gettering hole; 28. a sundry accumulation box; 29. an air pump; 30. a waste gas recovery chamber; 31. a second slide bar; 32. an electric slider; 33. a second electric telescopic rod; 34. a second sanding block; 35. and a controller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

First embodiment

Referring to fig. 1-6, a welding device for machining comprises a workbench 1, an upper chuck 2 and a lower chuck 3 are coaxially arranged above the workbench 1, a controller 35 is arranged at the top of the workbench 1, an upper rotating shaft 5 is welded at the middle shaft above the upper chuck 2, a lower rotating shaft 19 is welded at the middle shaft below the lower chuck 3, driven gears 7 are sleeved on the upper rotating shaft 5 and the lower rotating shaft 19, a servo motor 22 is arranged below the workbench 1, the servo motor 22 is in transmission connection with the two driven gears 7, a first hydraulic cylinder 11 is arranged at the upper end surface of the workbench 1, a second hydraulic cylinder 12 is arranged at the output end of the first hydraulic cylinder 11, a third hydraulic cylinder 13 is arranged at the output shaft of the second hydraulic cylinder 12, a chuck 14 is arranged at the output shaft of the third hydraulic cylinder 13, a welding rod 15 is clamped by the chuck 14, a negative pole ring 21 is sleeved on the lower rotating shaft 19, the negative pole ring 21 is connected with an outer end negative pole power supply through a negative pole line, for creating a via.

Specifically, as shown in fig. 1-3, a fixing frame 4 having a U-shaped structure is disposed outside the upper chuck 2 and the lower chuck 3, two ends of the fixing frame 4 are rotatably connected to the upper rotating shaft 5 and the lower rotating shaft 19, a fixing rod is disposed at the bottom of the fixing frame 4, and the other end of the fixing rod is fixedly connected to the top of the workbench 1.

Specifically, as shown in fig. 1-3, a rotating shaft 10 is disposed on an output shaft of a servo motor 22, two driving gears 9 are sleeved on the rotating shaft 10, the two driving gears 9 are respectively connected with a corresponding driven gear 7 through a synchronous belt 8 in a meshing transmission manner, four chutes 6 arranged in a disc-shaped array are respectively formed in an upper rotating shaft 5 and a lower rotating shaft 19, ends of the upper rotating shaft 5 and the lower rotating shaft 19, at which the chutes 6 are formed, are made of an insulating material to prevent influence on the servo motor 22, a limiting block 25 slidably embedded in the chute 6 is welded on an inner side of the driven gear 7, a fourth hydraulic cylinder 20 is disposed below the workbench 1, an output end of the fourth hydraulic cylinder 20 is fixedly connected with the lower rotating shaft 19, the lower rotating shaft 19 penetrates through the workbench 1 through a first bearing sleeve, the lower rotating shaft 19 is slidably connected with the workbench 1, an outer surface of the rotating shaft 10 is fixedly connected with one side of the fixing frame 4 through a second bearing sleeve, plays a good role in limiting and fixing and prevents the rotating shaft 10 from inclining or being infirm after long-time use.

Specifically, as shown in fig. 4 and 5, a plurality of gettering holes 27 are drilled in the lower chuck 3 in a uniform circumferential array, a gas flow sensor is disposed in each gettering hole 27 for detecting a gas flow rate in each gettering hole 27, a detection value of the gas flow sensor is transmitted to the controller 35, each electrical element and each hydraulic element are electrically controlled by the controller 35, a gettering tank 28 is disposed at the bottom of the lower chuck 3 through the gettering hole 27, a filter tank is disposed at the bottom of the gettering tank 28, a filter screen is slidably connected in the filter tank, welding generated by welding can fall into the gettering tank 28 along the gettering holes 27 through the filter screen and be collected by the filter screen, simultaneously generated waste gas can pass through the filter screen, a waste gas recovery cavity 30 is drilled at the bottom of the gettering tank 28 by the fixing frame 4, an air suction pump 29 is disposed at the top of the waste gas recovery cavity 30 through a check valve, an air inlet of the check valve is disposed at an air outlet of the air suction pump 29, the exhaust port of the one-way valve faces the waste gas recovery cavity 30, the extraction port of the extraction pump 29 faces the bottom of the impurity accumulation box 28, the extraction pump 29 can absorb toxic waste and waste residues generated during welding between the lower chuck plate 3 and the upper chuck plate 2 along the impurity absorption holes 27 by means of wind power to enable the waste and the waste residues to correspondingly fall to the impurity accumulation box 28 and the waste gas recovery cavity 30, meanwhile, the disc-shaped workpieces on the top of the lower chuck plate 3 can be effectively adsorbed by means of the suction force of the extraction pump 29, the two disc-shaped workpieces to be welded are clamped between the upper chuck plate 2 and the lower chuck plate 3 by matching with the fourth hydraulic cylinder 20, the clamping force generated when the upper chuck plate 2, the lower chuck plate 3 and the two disc-shaped workpieces are extruded by the fourth hydraulic cylinder 20 is very small, the upper surface and the lower surface of the workpieces cannot be damaged, the two disc-shaped workpieces are fixed by means of the suction force of the extraction pump 29, and the gas flow rate in each impurity absorption hole 27 can be detected by means of a gas flow rate sensor, and transmit its numerical value to controller 35, through controller 35 simulation judgement not only can detect the jam condition in each gettering hole 27, can also roughly judge whether discoid work piece is coaxial with lower chuck 3 before the welding begins, if the disalignment can artifically carry out the rightting work to prevent lower chuck 3 and upper chuck 2 from causing the welding effect poor because the disalignment when rotating the welding.

When the device is used, two disc-shaped workpieces to be welded are stacked between the upper chuck plate 2 and the lower chuck plate 3, the air suction pump 29 is started firstly, the outer surface of the disc-shaped workpieces can be cleaned by virtue of the air suction effect of the air suction pump 29, impurities on the outer surface of the workpieces fall to the top of the filter screen of the impurity accumulation box 28 along the impurity suction holes 27, the influence of dust, impurities and the like on the surface of the impurities on welding is prevented, meanwhile, the disc-shaped workpieces at the bottom are fixed by virtue of the suction force generated by the air suction pump 29, the gas flow velocity in each impurity suction hole 27 is detected by a gas flow sensor, when the flow velocity of the impurity suction holes 27 which are coaxial with the lower chuck plate 3 is different and part of the impurity suction holes 27 are in a blocking state, the disc-shaped workpieces at the bottom and the lower chuck plate 3 are not coaxial, and manual fine adjustment is needed to realize coaxiality so as to avoid the influence on welding processing; when the flow rate of the impurity suction hole 27 which is coaxial with the lower chuck plate 3 is the same and the maximum, the disc-shaped workpiece is positioned in the state of being coaxial with the lower chuck plate 3, only the suction force of the air suction pump 29 needs to be increased at the moment, the disc-shaped workpiece at the bottom is tightly fixed at the top of the lower chuck plate 3, the fixation is firmer and more reliable, the damage of the two disc-shaped workpieces caused by the upper and lower extrusion of the upper chuck plate 2 and the lower chuck plate 3 can be avoided during welding, then the fourth hydraulic cylinder 20 is started to act, the lower chuck plate 3 is wholly upwards pushed, the distance between the lower chuck plate 3 and the upper chuck plate 2 is reduced, only the top disc-shaped workpiece needs to be contacted with the upper chuck plate 2, the sliding can be avoided by means of the friction force between the top disc-shaped workpiece and the upper chuck plate 2, the clamping operation on the workpiece can be realized, the clamping effect is good, and the clamping degree is high.

Then, a servo motor 22 is started to rotate, the servo motor 22 drives a rotating shaft 10 to rotate, the rotating shaft 10 realizes synchronous transmission of an upper rotating shaft 5 and a lower rotating shaft 19 through two groups of synchronous belt 8 transmission mechanisms, so that synchronous rotation of an upper chuck plate 2 and a lower chuck plate 3 is realized, the upper chuck plate 2 and the lower chuck plate 3 drive two stacked disc-shaped workpieces to rotate, a first hydraulic cylinder 11 adjusts the height of a welding rod 15 in the Z-axis direction, a second hydraulic cylinder 12 adjusts the X-axis direction, and a third hydraulic cylinder 13 adjusts the Y-axis direction, at the moment, an originally complex strip conveying process can be decomposed into two simple one-way working processes, namely, the workpieces are not moved and the welding rod 15 moves to weld a gap between the two workpieces in the traditional welding process, when a complex strip conveying mode is required, such as common strip conveying modes such as fish scale, crescent and sawtooth, not only need welding rod 15 to advance along the welding direction, especially to the processing of discoid work piece, the advancing direction of welding rod 15 is more complicated circumference shape, still need control welding rod 15 up-and-down round trip movement in order to reach spiral or the welding mode of circumference shape, last still need constantly to feed welding rod 15 to the work piece direction, be used for compensating the 15 tip of welding rod that consume, guarantee that the clearance between welding rod 15 and the work piece satisfies the requirement constantly, control in this kind of three dimension will be too complicated if only realize through control welding rod 15, very inconvenient operation, this embodiment just decomposes its motion in three dimensions into the linear motion of upper chuck 2 and lower chuck 3 circular motion and welding rod 15, in order to make things convenient for welding process, and the machining precision is improved, specifically: taking a spiral strip conveying manner as an example, the disc-shaped workpiece is driven by the servo motor 22 to rotate the upper chuck 2 and the lower chuck 3 under the clamping and fixing effects of the upper chuck 2 and the lower chuck 3, thereby driving the two disc-shaped workpieces to rotate, realizing the movement of the welding rod 15 along the circumferential direction by the rotation of the disc-shaped workpieces, the spiral strip conveying mode at the welding seam of the disc-shaped workpiece can be realized only by controlling the first hydraulic cylinder 11 to drive the welding rod 15 to move up and down in the Z direction and matching with the rotation of the welding rod 15, meanwhile, the third hydraulic cylinder 13 drives the welding rod 15 to continuously move towards the end of the disc-shaped workpiece in the Y-axis direction so as to compensate the end part of the welding rod 15 consumed in the welding process, the feeding speed is related to the rotation speed of the disc-shaped workpiece driven by the servo motor 22, so that the conditions of strip adhesion, strip breakage and the like are avoided.

Meanwhile, the included angle of the advancing direction of the welding rod 15 and the workpiece during welding is also very important in the welding process, and the welding quality is directly related, the embodiment specifically is that the second hydraulic cylinder 12 is controlled to drive the welding rod 15 to move in the X-axis direction, so that the welding position of the welding rod 15 and the disc-shaped workpiece is changed, so that the included angle between the position of the welding rod 15 and the rotating speed direction of the disc-shaped workpiece is changed, the included angle is the required included angle between the welding rod 15 and the workpiece during welding, therefore, when welding disc-shaped workpieces with different material shapes, only the second hydraulic cylinder 12 is controlled to drive the welding rod 15 to move in the X-axis direction, and the third hydraulic cylinder 13 is used to drive the welding rod 15 to perform length compensation in the Y-axis direction, so as to obtain the optimal welding angle, improve the welding quality, adjust the welding rod 15 in each dimension, and ensure that the welding rod 15 can be in butt joint, when contact between welding rod 15 and the welding seam, form the route between with negative pole ring 21 to carry out welding operation, through servo motor 22 at the uniform velocity rotation, realize the even welding to discoid work piece outer wall, need not artifical the participation, can accomplish welding operation, promote work efficiency.

Because high temperature melting welding rod 15 and discoid work piece in the welding process, consequently can produce a large amount of poisonous sweeps and waste gas, for example welding slag, dust, carbon monoxide, ozone and nitrogen oxide etc. if this harmful gas can cause the influence to the staff health if not in time processing, this moment because air suction pump 29 work not only can be fixed bottom discoid work piece with the help of its suction, can also extract the harmful gas and the welding slag of welding position, and make this impurity get into in the collection miscellaneous case 28 along gettering hole 27, the great impurity of volume can be intercepted inside collection miscellaneous case 28 under the filtering action of the filter screen of collection miscellaneous case 28 bottom, and gaseous impurity is collected inside waste gas recovery chamber 30 through the filter screen, air suction pump 29 and check valve, only need open each door after the processing and carry out recovery processing can. Therefore, welding quality can be guaranteed, impurity and waste gas generated by welding can be recovered and collected, environmental pollution caused by exposure of the impurity and waste gas in the air is prevented, and influence on health of workers is caused.

Second embodiment

Based on the welding device for machining provided by the first embodiment, two disc-shaped workpieces need to be positioned and fixed before welding, the above-mentioned positioning is judged by detecting the flow rate of the gettering holes 27 after the operation of the suction pump 29, the positioning mode has very poor precision, manual adjustment is still too complicated when the two disc-shaped workpieces are not coaxial, the welding surface needs to be coarsely ground before welding, the welding effect is prevented from being influenced by the uneven surface, when two stacked disc-shaped workpieces are welded, a welding seam needs to be primarily ground at a welding position before welding, so that the molten pool generated at the end of the welding rod 15 has a place to fuse the upper and lower two disc-shaped workpieces without generating a convex portion, in order to solve the above problems, according to fig. 7 and 8, the welding device for machining further includes: the upper end surface of the workbench 1 is provided with a first slide bar 16, the first slide bar 16 is slidably sleeved with a slide block 17, the slide block 17 is fixedly connected with the first slide bar 16 through a bolt 24, the height of the slide block 17 can be limited through a fixing bolt 24, so that the height of the slide block 17 is determined, multiple times of adjustment are not needed after welding parts in the same batch are determined, one side of the slide block 17 is provided with a first electric telescopic rod 18, the output end of the first electric telescopic rod 18 is provided with a first polishing block 23, the first polishing block 23 can polish the outer surfaces of two stacked disc-shaped workpieces, the position of the top of the workbench 1, which is opposite to the first slide bar 16, is provided with a second slide bar 31, the second slide bar 31 is slidably sleeved with an electric slide block 32, the electric slide block 32 can slide on the second slide bar 31 continuously under the adjusting action of a controller 35, so as to realize the alignment work of the disc-shaped workpieces, one side of electronic slider 32 is equipped with second electric telescopic handle 33, the output of second electric telescopic handle 33 is equipped with second sanding block 34, the horizontal axis department of second sanding block 34 is equipped with welding seam sanding head 26, with the help of welding seam sanding head 26, not only can realize the alignment work of discoid work piece, can also be to the hookup location of two discoid work pieces that stack the welding seam of polishing, be used for improving welding quality, welding seam sanding head 26 tip is equipped with pressure sensor and is used for detecting the pressure value when welding seam sanding head 26 contacts with discoid work piece, be used for judging whether discoid work piece and lower (holding) chuck 3 are coaxial, and also can judge its degree of polishing the welding seam.

When the device is used, the vertical height of the sliding block 17 on the first sliding rod 16 is adjusted, the first electric telescopic rod 18 is synchronously matched, the extending length of the first electric telescopic rod 18 is the distance from the axis of the lower chuck plate 3 to the first polishing block 23 minus the radius of the disc-shaped workpiece to be welded, so that the first polishing block 23 can be theoretically attached to the outer wall of the disc-shaped workpiece, the disc-shaped workpiece is placed on the top of the lower chuck plate 3, one side of the disc-shaped workpiece is in contact with the first polishing block 23, the coaxiality of the disc-shaped workpiece and the lower chuck plate 3 cannot be completely guaranteed at the moment, the air pump 29 is started, the bottom disc-shaped workpiece is adsorbed to the top of the lower chuck plate 3, the adsorption force is limited, the bottom disc-shaped workpiece can still move, and then the fourth hydraulic cylinder 20 is started to drive the two stacked disc-shaped workpieces to be clamped by the upper chuck plate 2 and the lower chuck plate 3, but the clamping force is limited, the two disc-shaped workpieces can still move.

Starting the electric sliding block 32, the electric sliding block 32 drives the second electric telescopic rod 33 to rise to a certain height, the second electric telescopic rod 33 drives the second grinding block 34 to move towards the disc-shaped workpiece end, the moving distance is the distance between the end part of the welding seam grinding head 26 and the axle center of the lower chuck plate 3 minus the radius of the disc-shaped workpiece, at the moment, if the disc-shaped workpiece and the lower chuck plate 3 are not coaxial, the welding seam grinding head 26 can extrude the disc-shaped workpiece to generate a certain displacement, and the pressure value detected by the pressure sensor at the end part of the welding seam grinding head 26 is also larger than the pressure threshold value set by the pressure sensor, at the moment, the servo motor 22 is started, the servo motor 22 drives the lower chuck plate 3 and the upper chuck plate 2 to rotate, the upper chuck plate 2 and the lower chuck plate 3 drive the two disc-shaped workpieces stacked inside to rotate, and due to the limiting effect of the first grinding block 23 and the welding seam grinding head 26 and the fixing effect of the air suction pump 29, the lower chuck plate 3 and the upper chuck plate 2, the disc-shaped workpiece at the bottom continuously moves towards the position coaxial with the lower chuck plate 3 in the rotating process, the disc-shaped workpiece stacked at the bottom of the top can synchronously move and correct the position due to the friction force of the contact position of the disc-shaped workpiece and the extrusion of the upper chuck plate 2 and the lower chuck plate 3 when moving, and finally the disc-shaped workpiece is coaxially placed with the lower chuck plate 3, the process can carry out real-time judgment and detection by means of the gas flow rate of each gettering hole 27 in the gas flow sensor, when the flow rates in the gettering holes 27 with the same axis are the same, preliminary judgment can be carried out, then the accurate judgment is carried out by means of the value of the pressure sensor at the end part of the welding seam polishing head 26, in the rotating process of the upper chuck plate 2 and the lower chuck plate 3 driven by the servo motor 22, the position of the disc-shaped workpiece is corrected, the value of the pressure sensor continuously changes, and when the value of the pressure sensor does not change and reaches the set pressure threshold value, the disc-shaped workpiece and the lower chuck 3 are coaxial; then, only the electric sliding block 32 needs to be controlled to lift the second electric telescopic rod 33, and the above work is repeated, so that the disc-shaped workpiece at the top and the upper chuck 2 are coaxial, and in order to obtain higher coaxial precision, the height of the electric sliding block 32 needs to be controlled for multiple times to work.

When the disc-shaped workpiece is coaxial with the upper chuck 2 and the lower chuck 3, the suction force of the air suction pump 29 is increased so that the disc-shaped workpiece at the bottom is tightly contacted and fixed with the lower chuck 3, and meanwhile, the fourth hydraulic cylinder 20 is started so that the lower chuck 3 and the upper chuck 2 clamp the stacked disc-shaped workpiece and the stacked disc-shaped workpiece cannot move in the polishing process, at the moment, the rotating speed of the servo motor 22 is increased, the first polishing block 23 polishes the welding position, and the welding effect is prevented from being influenced by the existence of substances such as rust and the like; meanwhile, the electric slide block 32 drives the second electric telescopic rod 33 to move to enable the second electric telescopic rod 33 to reach the joint of two stacked disc-shaped workpieces, the second electric telescopic rod 33 drives the second polishing block 34 to continuously feed to the workpiece end, the upper end face and the lower end face of the welding seam polishing head 26 and the joint of the two disc-shaped workpieces are continuously subjected to friction polishing to form a welding seam in the feeding process, the pressure sensor detects the extrusion force between the end part of the welding seam polishing head 26 and the disc-shaped workpieces and transmits the extrusion force into the controller 35, so that the controller 35 controls the feeding speed of the second electric telescopic rod 33 to prevent the welding seam polishing head 26 from being damaged due to too fast feeding or the polishing efficiency is too low due to too slow feeding, when the second electric telescopic rod 33 controls the second polishing block 34 to feed to a required depth, after the second polishing block 34 is synchronously polished by matching with the first polishing block 23, the first electric telescopic rod 18 and the second electric telescopic rod 33 can be controlled to return to the original positions, and the work of positioning the disc-shaped workpiece, polishing the machined surface and cutting a welding line is completed. The device not only can polish to the welding surface of discoid work piece, can also accomplish the work of location and excavation welding seam in step, and it is efficient to polish, fixes a position accurately, for welding next provides fine operational environment and operating condition, guarantees the smooth efficient completion of weldment work on next step.

Claims

1. A welding device for machining comprises a workbench (1), an upper chuck (2) and a lower chuck (3) which are coaxially arranged above the workbench (1), and a controller (35) arranged at the top of the workbench (1), and is characterized in that a plurality of gettering holes (27) are drilled in the lower chuck (3) in an even circumferential array manner, a gas flow sensor is arranged in each gettering hole (27) and used for detecting the gas flow velocity in each gettering hole (27), an upper rotating shaft (5) is welded at the middle shaft above the upper chuck (2), a lower rotating shaft (19) is welded at the middle shaft below the lower chuck (3), a negative pole ring (21) is sleeved on the lower rotating shaft (19), fixing frames (4) in a U-shaped structure are arranged at the outer sides of the upper chuck (2) and the lower chuck (3), and the two ends of each fixing frame (4) are rotatably connected with the upper rotating shaft (5) and the lower rotating shaft (19) through bearings, a first hydraulic cylinder (11) is arranged on the upper end face of the workbench (1), a second hydraulic cylinder (12) is arranged at the output end of the first hydraulic cylinder (11), a third hydraulic cylinder (13) is arranged at the output shaft of the second hydraulic cylinder (12), a chuck (14) is arranged at the output shaft of the third hydraulic cylinder (13), and a welding rod (15) is clamped by the chuck (14);

a first sliding rod (16) is arranged on one side of the upper end face of the workbench (1), a sliding block (17) is sleeved on the first sliding rod (16) in a sliding manner, a first electric telescopic rod (18) is arranged on one side of the sliding block (17), and the output end of the first electric telescopic rod (18) is provided with a first sanding block (23), the top of the workbench (1) is provided with a second sliding rod (31) at the position opposite to the first sliding rod (16), an electric sliding block (32) is sleeved on the second sliding rod (31) in a sliding manner, a second electric telescopic rod (33) is arranged on one side of the electric sliding block (32), the output end of the second electric telescopic rod (33) is provided with a second grinding block (34), a welding seam polishing head (26) is arranged at the horizontal middle shaft of the second polishing block (34), the end part of the welding seam polishing head (26) is provided with a pressure sensor for detecting the pressure value when the welding seam polishing head (26) is contacted with the disc-shaped workpiece.

2. The welding device for machining according to claim 1, wherein driven gears (7) are sleeved on the upper rotating shaft (5) and the lower rotating shaft (19), a servo motor (22) is arranged below the workbench (1), an output shaft of the servo motor (22) penetrates through the workbench (1) to be provided with a rotating shaft (10), two driving gears (9) are sleeved on the rotating shaft (10), and the two driving gears (9) are connected with the corresponding driven gears (7) through a synchronous belt (8) in a meshing transmission mode.

3. A welding device for machining according to claim 2, characterized in that the bottom of the fixing frame (4) is provided with a fixing rod, and the other end of the fixing rod is fixedly connected with the top of the workbench (1).

4. The welding device for machining according to claim 2, wherein a plurality of sliding grooves (6) arranged in a disc-shaped array are uniformly formed in the upper rotating shaft (5) and the lower rotating shaft (19) in an array manner, and the limiting blocks (25) slidably embedded in the sliding grooves (6) are welded on the inner side of the driven gear (7).

5. The welding device for machining according to claim 1, characterized in that a fourth hydraulic cylinder (20) is arranged below the workbench (1), an output end of the fourth hydraulic cylinder (20) is fixedly connected with the lower rotating shaft (19), the lower rotating shaft (19) penetrates through the workbench (1) through a first bearing sleeve, and the lower rotating shaft (19) is connected with the workbench (1) in a sliding manner.

6. The welding device for machining according to claim 1, wherein a sundry collecting box (28) is arranged at the bottom of the lower chuck (3) through a sundry sucking hole (27), a filter tank is arranged at the bottom of the inner side of the sundry collecting box (28), and a filter screen is connected in the filter tank in a sliding mode.

7. The welding device for machining according to claim 6, characterized in that the fixing frame (4) is provided with an exhaust gas recovery cavity (30) at the bottom of the impurity collecting box (28), the top of the exhaust gas recovery cavity (30) is provided with an air suction pump (29) through a one-way valve, an air inlet of the one-way valve is arranged at an air outlet of the air suction pump (29), and an air suction opening of the air suction pump (29) is opposite to the bottom of the impurity collecting box (28).

8. A welding device for machining according to claim 1, characterized in that the sliding block (17) is fixedly connected to the first sliding bar (16) by means of a bolt (24).

9. A welding device for machining according to claim 1, characterized in that the outer surface of the rotating shaft (10) is rotatably connected to one side of the holder (4) by means of a second bearing bush.

10. A welding apparatus for machining according to claim 1, wherein detected values of said gas flow sensor and said pressure sensor are transmitted to a controller (35), and said controller (35) electrically controls each of electric components and hydraulic components.