CN111922573B

CN111922573B - Multi-head rotary welding machine for cement grinding disc

Info

Publication number: CN111922573B
Application number: CN202010651119.0A
Authority: CN
Inventors: 吴伟; 刘圣善; 刘丙学; 魏灿利
Original assignee: Shandong Yihao Heavy Industry Technology Co ltd
Current assignee: Shandong Yihao Heavy Industry Technology Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2022-07-01
Anticipated expiration: 2040-07-08
Also published as: CN111922573A

Abstract

The invention discloses a multi-head rotary welding machine for a cement grinding disc, which comprises a fixed shaft, a rotating shaft sleeve, a plurality of connecting rods and a containing plate for containing the cement grinding disc, wherein the working surface of the containing plate is horizontally arranged, the containing plate is arranged below the rotating shaft sleeve, the fixed shaft is vertically and fixedly arranged, the rotating shaft sleeve is coaxially and fixedly sleeved on the fixed shaft in a rotating way, the connecting rods are uniformly arranged along the circumferential direction of the central axis of the rotating shaft sleeve, one end of each connecting rod is fixedly connected with the rotating shaft sleeve, welding guns are vertically connected below the connecting rods, the distances between the adjacent welding guns and the central axis of the rotating shaft sleeve are arranged at equal intervals, the double-head welding machine also comprises a supporting base for containing a welding machine main body, and the supporting base is detachably connected with the rotating shaft sleeve. The multi-head rotary welding machine improves the efficiency of repairing the grinding disc and reduces the labor intensity of workers.

Description

Multi-head rotary welding machine for cement grinding disc

Technical Field

The invention relates to the technical field of cement grinding disc repairing equipment, in particular to a multi-head rotary welding machine for a cement grinding disc.

Background

The vertical mill gradually replaces a ball mill with the advantages of high yield, high grinding efficiency, low energy consumption and the like, and becomes a preferred device of a raw material and cement grinding system in cement production.

The Chinese utility model with publication number CN101637737, application date 20080731 relates to a large-scale combined millstone vertical mill, which comprises a frame, a millstone device and an air duct system arranged in the frame, a middle shell and a mill roller pressurizing system arranged above the frame, a separator arranged above the middle shell, a feeding system arranged in the middle shell and a power driving system, and is characterized in that the millstone in the millstone device is formed by connecting an upper half part and a lower half part by a flange structure through bolts; the invention overcomes the defects of large volume, heavy weight, large manufacturing and processing difficulty and difficult transportation of the millstone in the existing large vertical mill, in particular to the problem that the speed reducer can be directly damaged once the millstone is cracked and damaged, and is mainly suitable for a grinding system for raw materials, coal powder, cement and slag in cement production.

Because the mill disc generally includes that a plurality of fan-shaped mill disc sections splice form, the mill disc is when production processing cement, because its working face often can produce wearing and tearing, consequently need to utilize welder to restore its wearing and tearing face, generally need the manual work to weld the wearing and tearing face of mill disc in the restoration process and restore its working face.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the grinding disc repairing device, which has the effects of improving the grinding disc repairing efficiency and reducing the labor intensity of workers.

A multi-head rotary welding machine for cement millstones comprises a fixed shaft, a rotating shaft sleeve, a plurality of connecting rods and a containing plate for containing the cement millstones, wherein the working surface of the containing plate is horizontally arranged, the containing plate is arranged below the rotating shaft sleeve, the fixed shaft is vertically and fixedly arranged, the rotating shaft sleeve is coaxially and fixedly sleeved on the fixed shaft, the connecting rods are uniformly arranged along the circumferential direction of the central axis of the rotating shaft sleeve, one end of each connecting rod is fixedly connected with the rotating shaft sleeve, welding guns are vertically connected below the connecting rods, the distances between adjacent welding guns and the central axis of the rotating shaft sleeve are arranged at equal intervals, the double-head welding machine further comprises a supporting base for placing a welding machine main body, the supporting base is detachably connected with the rotating shaft sleeve, the rotating shaft sleeve is connected with a driving mechanism for controlling the rotating shaft sleeve to rotate along the direction of the central axis, the containing plate is connected with a positioning mechanism which enables the central axes of the fan-shaped grinding disc and the rotary shaft sleeve to be positioned on the same straight line.

By adopting the technical scheme, when the millstone needs to be repaired by a worker, the millstone segments can be spliced into the complete millstone and placed on the holding plate, and the central axis of the millstone and the central axis of the rotating shaft sleeve are ensured to be on the same straight line by utilizing the positioning mechanism. The operator then adjusts the position of the welding gun on each connecting rod so that the positions of the wear surfaces of the abrasive discs that are to be welded are all at different distances from the central axis of the rotating sleeve. Then the driving mechanism drives the rotating shaft sleeve to rotate. Meanwhile, the driving mechanism drives the rotating shaft sleeve to rotate and drives the welding guns to move along the surface, needing to be abraded, of the grinding disc, during rotation, the welding guns above the surface, needing to be abraded, of the grinding disc work, due to the fact that the plurality of welding guns are arranged, the positions of the welding guns, away from the central axis of the rotating shaft sleeve, are different, and the rotating shaft sleeve rotates for a circle, and the abraded surface of the grinding disc can be repaired. The multi-head rotary welding machine improves the efficiency of repairing the grinding disc and reduces the labor intensity of workers.

The invention in a preferred example may be further configured to: the fixed a plurality of support connecting rods that are provided with of rotation axle sleeve circumference, the support base includes polylith supporting baseplate, supporting baseplate can dismantle fixed the setting on the support connecting rod.

By adopting the technical scheme, the supporting base plate is mainly used for placing devices such as the welding gun main body, the devices are placed on the supporting base plate during working, and when the multi-head rotary welding machine repairs the grinding disc, the supporting base plate rotates along with the rotation of the rotating shaft sleeve, so that the devices such as the welding gun main body are driven to rotate together.

The present invention in a preferred example may be further configured to: the fixed axle lower extreme fixedly connected with support bedplate, the support bedplate sets up subaerial, actuating mechanism includes driving motor, double-end speed reducer, fixed plate, a pair of rotating gear, a pair of drive chain, the fixed cover of fixed plate is established in the outside of rotating the axle sleeve, driving motor and double-end speed reducer are connected, and the rotating gear is fixed the cover respectively and is established in the axis of rotation cover portion of fixed plate top and below, and the output shaft of double-end speed reducer all is connected with output gear, the drive chain cover is established on rotating gear and output gear.

Through adopting above-mentioned technical scheme, the backup pad seat plays the fixed effect of support to the fixed axle. During operation, driving motor rotates to drive double-end speed reducer to rotate, and then drives the running gear and rotate, so that the running shaft cover takes place to rotate, and the running shaft cover rotates, and then drives the connecting rod and support the base and rotate, and welder work simultaneously is in order to restore the mill.

The present invention in a preferred example may be further configured to: the connecting rod is connected with a supporting rod, one end of the supporting rod is fixedly connected with the connecting rod, and the other end of the supporting rod is fixedly connected with the side wall of the rotating shaft sleeve.

Through adopting above-mentioned technical scheme, the setting of bracing piece can improve the fixed stability of connecting rod, and then improves the job stabilization nature of bull spin welding machine.

The present invention in a preferred example may be further configured to: the welding gun is characterized in that scale marks which are away from the central axis of the rotating shaft sleeve are marked on the connecting rod, the welding gun is arranged on the connecting rod in a sliding mode along the length direction of the connecting rod, and the connecting rod is provided with a fixing assembly used for fixing the position of the welding gun.

By adopting the technical scheme, the arrangement of the scale marks can facilitate the worker to know the position of the welding tip of the welding gun away from the central axis of the rotating shaft sleeve, and further facilitate the worker to adjust the position of the welding gun, so that the welding gun can aim at the wear surface of the grinding disc. The arrangement of the fixing component can be used for fixing the welding gun, so that the welding gun is stable in working.

The present invention in a preferred example may be further configured to: the connecting rod has seted up the shifting chute along its length direction, fixed subassembly includes sliding block, spacing bolt, sliding block and welder fixed connection, and the sliding block slides along shifting chute length direction and sets up at the shifting chute, sliding block and spacing bolt threaded connection, and spacing bolt pass the sliding block and be connected with the connecting rod, be provided with the indicator of instructing welding nozzle distance rotation axle sleeve center axis distance on the sliding block.

Through adopting above-mentioned technical scheme, when needs adjustment welder's position, the staff unscrews spacing bolt, removes the sliding block to suitable position in the shift chute simultaneously, and later the staff screws up positioning bolt to fix the sliding block and the distance of welder apart from rotating the axle sleeve axis. The setting of indicateing sign can make things convenient for the staff to carry out the reading on the connecting rod.

The present invention in a preferred example may be further configured to: the positioning mechanism comprises an annular sleeve and a telescopic rod, the annular sleeve is fixedly sleeved outside the rotating shaft sleeve, one end of the telescopic rod is vertically connected with a chalk component used for drawing circles on the containing plate, and the telescopic rod is marked with scale marks of the distance between the chalk component and the central axis of the rotating shaft sleeve.

Through adopting above-mentioned technical scheme, because its internal diameter of different mill also is different, for guaranteeing that the central axis of mill when restoreing is located same straight line with the central axis of rotation axle sleeve, the staff is earlier through positioning mechanism after placing the mill section on holding the board, adjusts the length of telescopic link and draws a circle unanimous with the mill internal diameter size of waiting to process on holding the board, later the staff utilizes the circle of drawing on holding the board in order to place the mill section and splice into the mill.

The invention in a preferred example may be further configured to: the chalk component comprises a vertical rod and a chalk which are vertically arranged, the vertical rod is vertically arranged, one end of the vertical rod is fixedly connected with the telescopic rod, and the chalk is arranged on the vertical rod and far away from the end of the telescopic rod.

Through adopting above-mentioned technical scheme, through be provided with the chalk in montant one end, the staff can carry out the drawing circle to holding the board when rotating the telescopic link.

In summary, the invention includes at least one of the following beneficial technical effects:

one, the setting of bull spin welding machine: when the millstone needs to be repaired by workers, the millstone with complete millstone segments can be firstly spliced and placed on the holding plate, and the central axis of the millstone and the central axis of the rotating shaft sleeve are ensured to be on the same straight line by utilizing the jacking mechanism. The operator then adjusts the position of the welding gun on each connecting rod so that the positions of the wear surfaces of the abrasive discs that are to be welded are all at different distances from the central axis of the rotating sleeve. Then the driving mechanism drives the rotating shaft sleeve to rotate. Meanwhile, the driving mechanism drives the rotating shaft sleeve to rotate and drives the welding guns to move along the surface, needing to be abraded, of the grinding disc, during rotation, the welding guns above the surface, needing to be abraded, of the grinding disc work, due to the fact that the plurality of welding guns are arranged, the positions of the welding guns, away from the central axis of the rotating shaft sleeve, are different, and the rotating shaft sleeve rotates for a circle, and the abraded surface of the grinding disc can be repaired. The multi-head rotary welding machine improves the efficiency of repairing the grinding disc and reduces the labor intensity of workers.

Secondly, the setting of a positioning mechanism: because its internal diameter of mill of difference also is different, for guaranteeing that the central axis of mill when restoreing is located same straight line with the central axis of rotating the axle sleeve, the staff passes through positioning mechanism earlier after placing the mill section on holding the board, adjusts the length of telescopic link and draws a circle unanimous with the mill internal diameter size of waiting to process on holding the board, later the staff utilizes the circle of drawing on holding the board in order to place the mill section and splice into the mill.

Thirdly, the arrangement of the scale marks on the connecting rod can facilitate the worker to know the position of the welding nozzle of the welding gun away from the central axis of the rotating shaft sleeve, and further facilitate the worker to adjust the position of the welding gun, so that the welding gun can aim at the wear surface of the grinding disc. The arrangement of the fixing component can be used for fixing the welding gun, so that the welding gun is stable in working.

Drawings

FIG. 1 is a schematic view of the overall operation of the application;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an exploded view of the support floor and the support links;

fig. 4 is an exploded view of the positioning mechanism.

Reference numerals: 1. a fixed shaft; 2. rotating the shaft sleeve; 3. a connecting rod; 4. a holding plate; 5. a welding gun; 6. a support base; 7. a grinding disc; 8. a support link; 9. a support base plate; 10. a card slot; 11. clamping the bulges; 12. a drive motor; 13. a double-ended speed reducer; 14. a fixing plate; 15. a rotating gear; 16. a drive chain; 17. an output gear; 18. scale lines; 19. an indicator mark; 20. a moving groove; 21. a slider; 22. a limit bolt; 23. a through groove; 24. fixing the bolt; 25. a support bar; 26. an annular sleeve; 27. a telescopic rod; 28. a fixed rod part; 29. a telescopic rod part; 30. a telescopic groove; 31. a bolt; 32. a vertical rod; 33. a chalk; 34. a chalk groove; 35. an auxiliary spring; 36. a welding gun main body; 37. and supporting the seat board.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in figure 1, the multi-head rotary welding machine for the cement grinding disc disclosed by the invention comprises a fixed shaft 1, a rotary shaft sleeve 2, a plurality of connecting rods 3 and a containing plate 4 for containing the cement grinding disc 7. The working face level of holding board 4 sets up, and holding board 4 sets up in the below of fixed axle 1, and the vertical fixed setting of fixed axle 1 rotates fixed cover to be established on fixed axle 1 with the axle sleeve 2 that rotates. A plurality of connecting rods 3 set up along the central axis circumference align to grid of rotation axle sleeve 2, and the one end of connecting rod 3 and rotation axle sleeve 2 fixed connection, and the equal vertical welder 5 that is connected with in below of connecting rod 3, and adjacent welder 5 sets up with the equidistant distance of rotating axle sleeve 2 the central axis. The double-end welding machine further comprises a supporting base 6 used for placing a welding machine main body, the supporting base 6 is detachably connected with the rotating shaft sleeve 2, the rotating shaft sleeve 2 is connected with a driving mechanism used for controlling the rotating shaft sleeve to rotate along the direction of the central axis, and the containing plate 4 is connected with a positioning mechanism used for enabling the fan-shaped grinding disc 7 and the central axis of the rotating shaft sleeve 2 to be located on the same straight line. During operation, the staff utilizes positioning mechanism to place 7 sections of mill stone on holding board 4 in order to splice into a complete mill stone 7, and later the staff has adjusted welder 5's position for first welder 5's position is located mill 7 wearing surface and is nearest to the central axis department that rotates axle sleeve 2, and later welder 5 equidistant interval sets up directly over mill 7 wearing surface, and every welder 5 is all inequality apart from the distance of the central axis that rotates axle sleeve 2. After the position of the welding gun 5 is adjusted by a worker, the driving mechanism drives the rotating shaft sleeve 2 to rotate, the welding guns 5 work simultaneously, and after one circle of work along the abrasion surface of the grinding disc 7 is finished, the welding guns 5 simultaneously process different positions of the abrasion surface so as to accelerate the repair of the grinding disc 7.

As shown in fig. 1, 2 and 3, a plurality of support connecting rods 8 are fixedly arranged on the circumferential direction of the rotating shaft sleeve 2, the support base 6 comprises a plurality of support bottom plates 9, a plurality of clamping grooves 10 are formed in the lower plate surface of each support bottom plate 9, a plurality of clamping protrusions 11 are arranged corresponding to the clamping grooves 10 in a supporting and connecting mode, a worker places the clamping protrusions 11 corresponding to the clamping grooves 10 on the support connecting rods 8 to fix the support bottom plates 9, the worker places devices such as a welding gun body 36 on the support bottom plates 9, and the welding gun body 36 can rotate along with the welding gun 5 during work. The lower end of the fixed shaft 1 is fixedly connected with a supporting seat plate 37, and the supporting seat plate 37 penetrates through the containing plate 4 and is arranged on the ground. The support base plate 37 can support the stationary shaft 1.

The driving mechanism comprises a driving motor 12, a double-end speed reducer 13, a fixing plate 14, a pair of rotating gears 15 and a pair of driving chains 16, wherein the fixing plate 14 is fixedly sleeved on the outer side of the rotating shaft sleeve 2, and an output shaft of the driving motor 12 is connected with an input shaft of the double-end speed reducer 13. The rotating gears 15 are respectively fixedly sleeved on the side walls of the rotating shaft sleeve 2 above and below the fixed plate 14. Two output shafts of the double-end speed reducer 13 are vertically arranged and are connected with an output gear 17, and a driving chain 16 is sleeved on the rotating gear 15 and the output gear 17. In operation, the driving motor 12 rotates to drive the double-headed speed reducer 13 to rotate, and then drives the rotating gear 15 to rotate, so that the rotating shaft sleeve 2 rotates, and then the connecting rod 3 and the supporting base 6 are driven to rotate, and meanwhile, the welding gun 5 works to repair the grinding disc 7.

The position of the welding gun 5 is adjusted for the convenience of the worker. The connecting rod 3 is marked with a scale line 18 which is away from the central axis of the rotating shaft sleeve 2, and the scale line is arranged on the connecting rod 3 along the length direction of the welding gun 5 along the connecting rod 3 in a sliding manner, and the connecting rod 3 is provided with a fixing component for fixing the position of the welding gun 5. Moving slot 20 has been seted up along its length direction to connecting rod 3, and fixed subassembly includes sliding block 21, stop bolt 22, and the fixed cover of sliding block 21 is established on welder 5, and sliding block 21 slides along moving slot 20 length direction and sets up in moving slot 20, sliding block 21 and stop bolt 22 threaded connection, and stop bolt 22 passes sliding block 21 and is connected with connecting rod 3, is provided with the indicator 19 of instructing welding nozzle distance to rotate 2 central axis distances of axle sleeve on the sliding block 21. Because the thicknesses of different grinding discs 7 may be different, in order to improve the applicability of the multi-head rotary welding machine, the working height of the welding gun 5 can be adjusted, the sliding block 21 is provided with a through groove 23, the welding gun 5 penetrates through the through groove 23 to be slidably connected with the sliding block 21, and one end of the sliding block 21 is in threaded connection with a fixing bolt 24 for fixing the relative position of the welding gun 5 and the sliding block 21. When adjusting the working height of the fixed welding gun 5, the worker can unscrew the fixing bolt 24 to adjust the working height of the welding gun 5, and after the adjustment is completed, the worker tightens the fixing bolt 24 so that one end of the fixing bolt 24 is abutted against the side wall of the welding gun 5, and then the welding gun 5 is fixed.

In order to improve the stability of the multi-head rotary welding machine during operation. All the welding has the bracing piece 25 on the connecting rod 3, and the one end and the connecting rod 3 welding of bracing piece 25, the other end and the lateral wall welding of rotating shaft sleeve 2.

As shown in fig. 1 and 4, the positioning mechanism includes an annular sleeve 26 and a telescopic rod 27. The fixed cover of annular cover 26 is established outside rotating shaft sleeve 2, and telescopic link 27 includes fixed pole portion 28 and flexible pole portion 29, and fixed pole portion 28 one end welds with annular cover 26, and flexible groove 30 has been seted up along its length direction to the other end, and flexible pole portion 29 slides and sets up in flexible groove 30, and the lateral wall in flexible groove 30 sets up threaded hole, and threaded hole threaded connection has bolt 31, can fix the position that flexible pole portion 29 is located flexible groove 30 through tightening bolt 31. A chalk 33 assembly for drawing a circle on the containing plate 4 is vertically connected to one end, far away from the telescopic rod part 29, of the telescopic rod part 27, and a scale line 18 for marking the distance from the chalk 33 assembly to the central axis of the rotating shaft sleeve 2 is marked on the telescopic rod part. The chalk 33 assembly comprises a vertical rod 32 and chalk 33 which are vertically arranged. The vertical rod 32 is vertically arranged, one end of the vertical rod 32 is fixedly welded with one end of the telescopic rod part 29, a chalk groove 34 for containing chalk 33 is formed in the end, away from the telescopic rod 27, of the vertical rod 32, the chalk 33 is vertically and slidably inserted into the chalk groove 34, an auxiliary spring 35 is arranged in the chalk groove 34, one end of the auxiliary spring 35 is fixedly connected with the bottom wall of the chalk groove 34, and the other end of the auxiliary spring is connected with the end of the chalk 33.

The specific working principle of this embodiment is as follows: before needs repair the mill 7, the length of staff adjustment telescopic link 27, and make chalk 33 unanimous with the internal diameter size of waiting to process mill 7 apart from the center distance of rotating shaft sleeve 2, later rotate shaft sleeve 2 and rotate, so that chalk 33 can draw a circle on holding board 4, the circle that the staff drawn through positioning mechanism places mill 7 section on the plummer and splices into a complete mill 7, later, the staff adjusts the position that welder 5 corresponds mill 7, make welder 5 in proper order equidistant interval outwards expand the setting. The operator then starts the rotation motor and at the same time the welding gun 5 is operated, so that the welding gun 5 performs machining on the wear surface of the grinding disc 7.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a cement is bull spin welding machine for mill which characterized in that: comprises a fixed shaft (1), a rotating shaft sleeve (2) and a plurality of connecting rods (3), and a containing plate (4) for placing a cement grinding disc (7), wherein the working surface of the containing plate (4) is horizontally arranged, the containing plate (4) is arranged below the rotating shaft sleeve (2), the fixed shaft (1) is vertically and fixedly arranged, the rotating shaft sleeve (2) is coaxially and fixedly sleeved on the fixed shaft (1) in a rotating way, the connecting rods (3) are uniformly arranged along the circumferential direction of the central axis of the rotating shaft sleeve (2), one end of the connecting rod (3) is fixedly connected with the rotating shaft sleeve (2), welding guns (5) are vertically connected below the connecting rod (3), the distance from each welding gun (5) to the central axis of the rotating shaft sleeve (2) is different, and the distance difference between the adjacent welding guns (5) and the central axis of the rotary shaft sleeve (2) is equal; the multi-head rotary welding machine further comprises a supporting base (6) used for placing a welding machine main body, the supporting base (6) is detachably connected with a rotating shaft sleeve (2), the rotating shaft sleeve (2) is connected with a driving mechanism for controlling the driving mechanism to rotate along the direction of the central axis, a containing plate (4) is connected with a positioning mechanism for enabling a fan-shaped grinding disc (7) and the central axis of the rotating shaft sleeve (2) to be located on the same straight line, the positioning mechanism comprises an annular sleeve (26) and a telescopic rod (27), the annular sleeve (26) is fixedly sleeved on the rotating shaft sleeve (2), the telescopic rod (27) is vertically connected with a chalk assembly used for drawing circles on the containing plate (4), and a scale line for marking the distance between the chalk assembly and the central axis of the rotating shaft sleeve (2) is marked on the telescopic rod (27).

2. The multi-head rotary welding machine for the cement grinding disc according to claim 1, characterized in that: the supporting device is characterized in that a plurality of supporting connecting rods (8) are circumferentially and fixedly arranged on the rotating shaft sleeve (2), the supporting base (6) comprises a plurality of supporting bottom plates (9), and the supporting bottom plates (9) can be detachably and fixedly arranged on the supporting connecting rods (8).

3. The multi-head rotary welding machine for the cement grinding disc according to claim 1, characterized in that: fixed axle (1) lower extreme fixedly connected with supports bedplate (37), support bedplate (37) set up subaerial, actuating mechanism includes driving motor (12), double-end speed reducer (13), fixed plate (14), a pair of running gear (15), a pair of drive chain (16), the outside at rotation axle sleeve (2) is established to fixed plate (14) fixed cover, driving motor (12) and double-end speed reducer (13) are connected, and running gear (15) are fixed the cover respectively and are established rotation axle sleeve (2) surface in fixed plate (14) top and below, and the output shaft of double-end speed reducer (13) all is connected with output gear (17), drive chain (16) cover is established on running gear (15) and output gear (17).

4. The multi-head rotary welding machine for the cement grinding disc as claimed in claim 2, characterized in that: all be connected with bracing piece (25) on connecting rod (3), the one end and connecting rod (3) fixed connection of bracing piece (25), the other end and the lateral wall fixed connection who rotates axle sleeve (2).

5. The multi-head rotary welding machine for the cement grinding disc as claimed in claim 1, characterized in that: the welding gun fixing device is characterized in that scale marks (18) which are distant from the central axis of the rotating shaft sleeve (2) are marked on the connecting rod (3), the welding gun (5) is arranged on the connecting rod (3) in a sliding mode along the length direction of the connecting rod (3), and a fixing assembly used for fixing the position of the welding gun (5) is arranged on the connecting rod (3).

6. The multi-head rotary welding machine for the cement grinding disc as claimed in claim 5, characterized in that: moving slot (20) have been seted up along its length direction in connecting rod (3), fixed subassembly includes sliding block (21), stop bolt (22), sliding block (21) and welder (5) fixed connection, and sliding block (21) slide along moving slot (20) length direction and set up in moving slot (20), sliding block (21) and stop bolt (22) threaded connection, and stop bolt (22) pass sliding block (21) and be connected with connecting rod (3), be provided with on sliding block (21) and instruct welding nozzle apart from rotating shaft sleeve (2) center axis distance indicator (19).

7. The multi-head rotary welding machine for the cement grinding disc according to claim 1, characterized in that: the chalk component comprises a vertical rod (32) and a chalk (33) which are vertically arranged, the vertical rod (32) is vertically arranged, one end of the vertical rod (32) is fixedly connected with the telescopic rod (27), and the chalk is arranged at the end, far away from the telescopic rod (27), of the vertical rod (32).