CN115740944A

CN115740944A - Cutter shaft welding machine of material crusher

Info

Publication number: CN115740944A
Application number: CN202211509787.5A
Authority: CN
Inventors: 吕建强; 陈奇; 周鹏; 陈中; 王正军; 张波; 吕宸; 贾毕清; 孙玉江; 陈沛贤; 叶伟龙
Original assignee: Huaiyin Institute of Technology
Current assignee: Huaiyin Institute of Technology
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-07

Abstract

The invention discloses a welding machine for a cutter shaft of a material grinder, which comprises a tail shaft and a positioning shaft, wherein the tail shaft is used for clamping and driving the cutter shaft to rotate; the coaxial line of location axle and tailshaft sets up at interval, has left end spline, middle spline, right-hand member portion on the location axle, and the left end spline has the tapering, and the radial fixed coordination of axial motion between the internal spline that the middle spline inserted the sleeve axle and the sleeve axle realizes the radial fixed coordination of axial displacement of location axle for the sleeve axle, and right-hand member portion connects the actuating mechanism that the drive location axle axial floated the removal. The left end spline of the positioning shaft adopts a certain taper, and when the left end spline of the positioning shaft is inserted into the spline sleeve of the cutter shaft by virtue of the driving mechanism which moves in an axial floating manner, the mutual contact surfaces have no gap. The problem of because of there is size error in the spline housing of arbor, lead to the spline housing of arbor and the left end spline clearance fit of location axle, positioning accuracy is not high, can produce vibration is solved.

Description

Cutter shaft welding machine of material crusher

Technical Field

The invention belongs to welding of a cutter shaft and a cutter holder of a pulverizer, and particularly relates to a welding machine for the cutter shaft of the material pulverizer.

Background

A cutter holder of the pulverizer is spirally welded on a cutter shaft, the conventional welding method mostly adopts manual operation, the labor intensity is high, and the position precision of the cutter holder is poor.

In patent CN 103056534A, an automatic welding machine for cutter shafts of agricultural rotary tillers is disclosed, comprising a program control device, a main frame, a shaft disc fixing device, a driving device, an auxiliary frame, an automatic cutter holder supplying device, a movable welding gun, a fixed welding gun and a shaft end fixing device; the driving device is connected to the main frame and drives the auxiliary frame to do reciprocating linear motion, and the auxiliary frame is provided with a cutter seat automatic feeding device and a movable welding gun; the shaft end fixing device is connected to the sliding track of the main frame, the distance between the shaft end fixing device and the shaft disc fixing device can be adjusted at will to adapt to cutter shafts with different lengths, and the fixed welding gun is arranged in the front upper portion of the shaft end fixing device and used for welding the shaft ends of the cutter shafts and the shaft tube. Wherein, the arbor both ends are through the reel fixing device, the rotation of arbor is realized to axle head fixing device, only can see out the reel fixing device in the drawing, the arbor is withstood with top mode to the axle head fixing device, because the right-hand member of conventional arbor is the spline housing structure, do not disclose the concrete cooperation structure when the arbor right-hand member is the spline housing structure in this patent document, this application is to this problem, the location axle cooperation realization transmission of proposing spline housing and new-type spline, and overcome the problem that the spline housing easily leads to positioning accuracy not high because of the dimensional error that processing exists, the production vibration.

Disclosure of Invention

Aiming at the defects of the prior art, the invention designs a welding machine for the cutter shaft of the material crusher, the left end spline of the positioning shaft adopts a certain taper, and when the left end spline of the positioning shaft is inserted into the spline sleeve of the cutter shaft by virtue of a driving mechanism with axial floating movement, no gap exists between the contact surfaces. The problem of because of there is size error in the spline housing of arbor, lead to the spline housing of arbor and the left end spline clearance fit of location axle, positioning accuracy is not high, can produce vibration is solved.

The technical scheme disclosed by the invention is as follows: a material crusher cutter shaft welding machine, which comprises a tail shaft (6) and a positioning shaft (29) which are used for clamping and driving the cutter shaft to rotate,

wherein, the tail shaft (6) is rotatably arranged on the frame (8),

the positioning shaft (29) and the tail shaft (6) are coaxial and arranged at intervals, a left end spline, a middle spline and a right end portion are arranged on the positioning shaft (29), the left end spline is tapered, the middle spline is inserted into an inner spline of the sleeve shaft (28) and is in radial fixed fit with the sleeve shaft (28) in an axial movement mode, the positioning shaft is in radial fixed fit with the sleeve shaft in an axial movement mode, and the right end portion is connected with a driving mechanism for driving the positioning shaft to axially float and move.

On the basis of the scheme, preferably, the driving mechanism comprises an electric push rod (15), the electric push rod (15) is fixed on a push rod support of the rack (8), a push shaft of the electric push rod (15) is connected with a floating push rod (18) through a third connecting sleeve (17) and a pin, the floating push rod (18) is inserted into a hole of a push rod connecting sleeve (22), two groups of disc springs (19) are arranged between the step of the floating push rod (18) and the push rod connecting sleeve (22), a bolt (21) presses a pressing plate (20) for limiting the push rod connecting sleeve (22) onto the floating push rod (18), the right end part of a positioning shaft (29) is fixedly connected with a rotating push rod (25) through a fourth connecting sleeve (26) and a pin, and the rotating push rod (25) is connected with the push rod connecting sleeve (22) through a tapered roller bearing (24) and an end face thrust bearing (23).

On the basis of the scheme, preferably, the reduction gearbox (11) is fixed on the rack (8), the pinion shaft (12) is installed in the reduction gearbox (11) through a pair of bearings and two bearing covers, an external spline of the sleeve shaft (28) is inserted into a spline hole of the large gear (27), and the pinion shaft (12) is in meshing transmission with the large gear (27).

On the basis of the scheme, preferably, the laser positioning plate (42) is fixed on the positioning shaft (29) and rotates along with the positioning shaft (29), the laser positioning plate (42) is provided with a detection hole, and the laser (42) is fixed on the reduction gearbox (11).

On the basis of the scheme, preferably, the tail shaft (6) is inserted into a bearing hole of the second bearing seat (5), the first nut (3) enables the tail shaft (6) to be fixed on a bearing inner ring of the second bearing seat (5), and the second bearing seat (5) is fixed on the tail shaft support (48).

On the basis of the scheme, preferably, the tail shaft servo motor (46) is fixed on the rack (8), an output shaft of the tail shaft servo motor (46) is connected with a screw of a screw nut pair (45) through a connecting sleeve (44) and a pin, the nut of the screw nut pair (45) is fixed in a tail shaft bracket (48), a pair of guide rails (47) is fixed on a bottom plate of the rack (8), and the tail shaft bracket (48) is connected with the guide rails (47) in a sliding mode and moves along the guide rails (47).

On the basis of the scheme, the automatic cutter seat positioning device preferably further comprises a positioning plate rotatably mounted on the rack, and a cutter seat positioning block (38) is arranged at the front end of the positioning plate;

wherein, a positioning plate servo motor (1) is fixed on a frame (8), an output shaft of the positioning plate servo motor (1) is connected with a left end rotating shaft of a positioning plate (7) through a connecting sleeve I (2) and a pin, the left end rotating shaft of the positioning plate (7) is inserted into a bearing hole of a bearing seat I (4), a bearing inner ring and the left end rotating shaft are locked by a screw, the bearing seat I (4) is fixed on a left bracket of a positioning plate of the frame (8),

and a rotating shaft at the right end of the positioning plate (7) is inserted into a bearing hole of the bearing seat III (9), a bearing inner ring and the rotating shaft are locked by a screw, the bearing seat III (9) is fixed on a right bracket of the positioning plate of the rack (8), and meanwhile, the rotating shaft at the right end of the positioning plate (7) is fixed on the bearing inner ring of the bearing seat III (9) by the nut II (10).

On the basis of the scheme, preferably, the tool apron servo motor (36) is fixed on a tool apron motor support of the positioning plate (7), two ends of the screw rod (39) are respectively connected with the inner bearing rings of the pair of UCP202 bearing seats (41), the pair of UCP202 bearing seats (41) are fixed on the positioning plate (7), and the tool apron servo motor (36) is in transmission connection with the screw rod (39) through the transmission case (35).

On the basis of the scheme, preferably, the transmission box (35) is a gear transmission mechanism, two ends of the transmission box (35) are respectively connected with the screw rod (39) and an output shaft of the tool apron servo motor (36), the tool apron positioning block guide rail (40) is fixed at the front end of the positioning plate (7), the nut mechanism (37) is in threaded transmission connection with the screw rod (39), the tool apron positioning block (38) is fixed on the nut mechanism (37), and meanwhile, the tool apron positioning block (38) is in sliding connection with the tool apron positioning block guide rail (40) and moves along the tool apron positioning block guide rail (40).

In addition to the above, preferably, a pair of supports (30) for supporting the cutter shafts are fixed to the frame (8).

Compared with the prior art, the invention has the following beneficial effects:

1. the left end spline of the positioning shaft adopts a certain taper, and when the left end spline of the positioning shaft is inserted into the spline sleeve of the cutter shaft by virtue of the driving mechanism which moves in an axial floating manner, the mutual contact surfaces have no gap. The problem of because of there is size error in the spline housing of arbor, lead to the spline housing of arbor and the left end spline clearance fit of location axle, positioning accuracy is not high, can produce vibration is solved. The positioning shaft can float and move in the axial direction in a proper amount, and the problem that the axial movement distance of the positioning shaft is uncertain due to dimension errors of a spline sleeve of the cutter shaft is solved.

2. The push rod connecting sleeve is in sliding fit with the floating push rod and is in rotating fit with the positioning shaft, the positioning shaft and the cutter shaft rotate together, and the electric push rod does not rotate.

3. The tail shaft realizes axial movement through the screw and nut pair and the guide rail, and is convenient to adjust so as to change the position of the tail shaft to adapt to different cutter shaft lengths.

4. The nut mechanism is matched with the screw to drive the tool apron positioning blocks to slide along the tool apron positioning block guide rails (the axial direction of the cutter shaft), and all tool aprons on one cutter shaft can be welded by only one tool apron positioning block.

5. The middle spline of the positioning shaft is matched with the inner spline of the sleeve shaft, so that the positioning shaft can move radially relative to the sleeve shaft, and the positioning shaft is matched with a driving mechanism which moves in an axial floating manner to realize that the axial floating of the positioning shaft solves the problem that the spline sleeve of the cutter shaft does not interfere with rotation while the size error exists.

6. The control platform makes the invention adapt to the requirements of different types of cutter shafts, different cutter holder distances and different cutter holder position and rotation angles.

Drawings

FIG. 1 is a schematic structural view of the present invention;

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

FIG. 3 is a schematic view of the positioning shaft;

FIG. 4 is a schematic diagram of the structure of the reducer;

FIG. 5 is a first perspective view of the present invention;

FIG. 6 is a second perspective view of the present invention;

FIG. 7 is a perspective view of the present invention with the arbor shaft removed;

fig. 8 is a control schematic of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, without inventive effort, other drawings and embodiments can be derived from them.

As shown in fig. 1-8, a material pulverizer shaft welding machine, comprising:

the positioning plate is used for positioning the cutter holder and is rotatably arranged on the rack;

wherein, locating plate servo motor 1 is fixed on the locating plate motor support of frame 8, and the output shaft of locating plate servo motor 1 realizes being connected with the left end pivot of locating plate 7 through adapter sleeve one 2 and round pin.

Specifically, a left-end rotating shaft of the positioning plate 7 is inserted into a bearing hole of the bearing seat I4, a bearing inner ring and the left-end rotating shaft are locked by a screw to realize rotary connection, and the bearing seat I4 is fixed on a left bracket of the positioning plate of the rack 8.

The right end rotating shaft of the positioning plate 7 is inserted into a bearing hole of the bearing seat III 9, the bearing inner ring and the rotating shaft are locked by a screw to realize rotating connection, the bearing seat III 9 is fixed on a positioning plate right support of the rack 8, and meanwhile, the nut II 10 enables the right end rotating shaft of the positioning plate 7 to be fixed on the bearing inner ring of the bearing seat III 9. The positioning plate servo motor 1 can drive the positioning plate 7 to rotate.

The tail shaft is rotatably arranged on the rack;

the tail shaft 6 is inserted into a bearing hole of the bearing seat II 5 to realize rotary connection, the nut I3 enables the tail shaft 6 to be fixed on a bearing inner ring of the bearing seat II 5, and the tail shaft 6 is fixed and can rotate freely. The second bearing block 5 is fixed on the tail shaft bracket 48.

In the axial direction of the tail shaft, a tail shaft bracket 48 is adjustably mounted on the rack, specifically, a tail shaft servo motor 46 is fixed on a corresponding bracket of the rack 8, an output shaft of the tail shaft servo motor 46 is linked with a screw of a screw nut pair 45 through a linking sleeve 44 and a pin, and a nut of the screw nut pair 45 is fixed in the tail shaft bracket 48. A pair of guide rails 47 are fixed to the bottom plate of the frame 8. The tail shaft bracket 48 is slidably connected to the guide rail 47 and moves along the guide rail 47. The tail shaft servo motor 46 drives the screw nut pair 45, and the nut enables the bracket 48 to move along the guide rail 47, so that the position of the tail shaft 6 is changed.

A cutter shaft servo motor 14 for driving the cutter shaft to rotate is fixed on a cutter shaft motor support of the frame 8, and an output shaft of the cutter shaft servo motor 14 is connected with a pinion shaft 12 in the reduction box through a connecting sleeve II 13 and a pin.

Wherein, the reduction gearbox 11 is fixed on the frame 8, and the pinion shaft 12 is arranged in the reduction gearbox 11 through a pair of bearings and two bearing covers. The external spline of the sleeve shaft 28 is inserted into the spline hole of the large gear 27 to realize connection transmission, and the small gear shaft 12 is in meshing transmission with the large gear 27. The sleeve shaft 28 is installed in the reduction box 11 through the large gear 27, the spacer bush, a pair of bearings and two bearing covers.

An electric push rod 15 is fixed on a push rod support of the frame 8, and an electric push rod servo motor 16 is an auxiliary mechanism of the electric push rod 15. The push-out shaft of the electric push rod 15 is connected with a floating push rod 18 through a connecting sleeve III 17 and a pin. The floating push rod 18 is inserted into a hole of the push rod connecting sleeve 22, and two groups of disc springs 19 are arranged between the step of the floating push rod 18 and the push rod connecting sleeve 22, so that the axial floating movement of the push rod connecting sleeve 22 is realized.

The bolt 21 presses the pressure plate 20 on the floating push rod 18 to limit the push rod connecting sleeve 22. The positioning shaft 29 is fixedly connected with the rotating push rod 25 through a fourth connecting sleeve 26 and a pin, and the rotating push rod 25 is connected with the push rod connecting sleeve 22 through a tapered roller bearing 24 and an end face thrust bearing 23.

The laser positioning plate 42 is fixed on the positioning shaft 29 and rotates along with the positioning shaft 29, and the laser positioning plate 42 is provided with a detection hole. The laser 43 is fixed to the reduction box 11.

The middle spline of the positioning shaft 29 is inserted into the inner spline of the sleeve shaft 28, so that the positioning shaft is in fixed fit with the sleeve shaft in the radial direction in the axial direction, and the output shaft of the cutter shaft servo motor 14 → the pinion shaft 12 → the bull gear 27 → the sleeve shaft 28 → the positioning shaft 29 → the rotation transmission of the cutter shaft 51 is realized.

The tool apron servo motor 36 is fixed on a tool apron motor support of the positioning plate 7. Two ends of the screw 39 are respectively connected with the bearing inner rings of a pair of UCP202 bearing seats 41, and the pair of UCP202 bearing seats 41 are fixed on the positioning plate 7. The transmission case 35 is a gear transmission mechanism to ensure the stability of transmission, and two ends of the transmission case 35 are respectively connected with the screw 39 and the output shaft of the servo motor tool apron positioning 36. The knife holder positioning block guide rail 40 is fixed on the positioning plate 7. The nut mechanism 37 is connected with the screw rod 39 for transmission, the tool apron positioning block 38 is fixed on the nut mechanism 37, and meanwhile, the tool apron positioning block 38 is connected with the tool apron positioning block guide rail 40 and moves along the tool apron positioning block guide rail 40.

The servo motor tool apron positioning 36 drives the screw rod 39 to rotate through the transmission box 35, the screw rod 39 drives the nut mechanism 37 and the tool apron positioning block 38 to move, and the tool apron positioning block 38 moves along the tool apron positioning block guide rail 40 to realize position change of the tool apron positioning block 38.

A pair of supports 30 for supporting the cutter shafts are fixed on the frame 8, and can be adjusted in position to adapt to the change of the lengths of the cutter shafts of different models and the change of the position and the size of cutter seats of the cutter shafts of different models. The support is provided with a V-shaped groove, so that cutter shafts with different diameters can be conveniently placed.

The right pedal switch 31, the middle pedal switch 32 and the left pedal switch 33 are fixed at the front end of the frame 8, and the control platform 34 is fixed at the right side of the frame 8.

The working principle is as follows:

1. the self-adaptive adjustment is implemented by inputting the length of the cutter shaft 51, the distance of the tool magazine and the position and rotation angle of the tool magazine into the control platform 34. The control platform 34 starts the tail shaft servo motor 46 to rotate, and the tail shaft bracket 48 is adjusted in position through the screw nut pair 45. The control platform 34 starts the cutter shaft servo motor to rotate the cutter shaft 14 and the laser 43, the system rotates according to the position rotation angle of the cutter seats, N cutter seats 52 are spirally distributed in a circle, and the system rotates for N times; meanwhile, the time for the cutter shaft 51 to rotate for 360 degrees is measured by the laser 43 for the laser positioning plate 42, the time difference between the cutter shaft and the cutter shaft is calculated by using an NARX neural network model, the actual welding working rotation angle of the position of the cutter holder is continuously adjusted, and the influence of the working error of the system is solved.

2. The cutter shaft 51 is placed on the pair of supports 30, and the left end taper hole of the cutter shaft 51 is in contact with the taper surface of the tail shaft 6. When the right end of the right pedal switch 31 is stepped, the electric push rod servo motor 16 of the electric push rod 15 is started, the push rod of the electric push rod 15 is started to extend, the electric push rod 15 pushes the floating push rod 18 to move leftwards, the floating push rod 18 pushes the two groups of disc springs 19, the two groups of disc springs 19 push the push rod connecting sleeve 22 to move leftwards, the push rod connecting sleeve 22 pushes the end face thrust bearing 23 and the end face thrust bearing 23 to push the rotating push rod 25 to move leftwards, the rotating push rod 25 pushes the positioning shaft 29 to move leftwards, a left end spline of the positioning shaft 29 is inserted into a spline sleeve of the cutter shaft 51, and the cutter shaft 51 is pushed leftwards by the positioning shaft 29. The tail shaft 6 and the positioning shaft 29 tightly press the cutter shaft 51, so that the tightly pressed cutter shaft 51 is fixed and can rotate. The electric part is controlled by the control platform 34.

The left end spline of the positioning shaft 29 adopts a certain taper, and when a certain error exists in the diameter of the spline housing of the cutter shaft 51, no gap exists between the mutual contact surfaces when the spline of the positioning shaft 29 is inserted into the spline housing of the cutter shaft 51. The disc spring 19 can make the positioning shaft 29 have a certain position adjustment in the axial direction, so as to solve the problem of the change of the depth of the spline housing of the positioning shaft 29 inserted into the cutter shaft 51. The problem of the spline housing of arbor 51 have size error, the spline housing of arbor 51 and the spline of location axle 29 produce clearance fit, positioning accuracy is not high, can produce the vibration is solved.

3. Stepping on the right end of the left pedal switch 33, starting the tool apron positioning 36 of the servo motor, and driving the nut mechanism 37 through the transmission case 35 and the screw 39 to drive the tool apron positioning block 38 to move to a preset position along the tool apron positioning block guide rail 40; the servo motor positioning plate rotates 1 to start, and the positioning plate 7 rotates to a working position above the cutter shaft 51.

The holder 52 is inserted into the positioning groove of the holder positioning block 38 and brought into contact with the cutter shaft 51, and spot-welded and positioned.

When the left end of the left pedal switch 33 is stepped, the cutter shaft of the servo motor rotates 14 to start, and the cutter shaft 51 rotates for an angle, so that the problem of interference when the positioning plate 7 rotates open is solved; starting the servo motor positioning plate to rotate 1, and rotating the positioning plate 7 away; the servomotor shaft rotation 14 is started again and the shaft 51 is rotated back to the working position. Complete the welding of the single seat 52.

After the positioning plate 7 is rotated away, the servo motor tool apron positioning 36 is started while welding is performed, and the tool apron positioning block 38 is moved to the next working position.

The electric part is controlled by the control platform 34.

4. After welding is finished, the right end of the middle pedal switch 32 is stepped, the servo motor cutter shaft rotation 14 is started, the servo motor cutter shaft rotation 14 drives the reduction gearbox 11, and the reduction gearbox 11 drives the positioning shaft 29 to enable the cutter shaft 51 to rotate for an angle to reach the welding position of the next cutter holder. The electric part is controlled by the control platform 34.

The welding operation of the second tool apron 52 is performed continuously, and all the tool shaft welding operations are completed in sequence and circularly.

In the backward welding operation of the second tool apron 52, when the right end of the left pedal switch 33 is stepped, the tool apron positioning 36 of the servo motor is started, and the nut mechanism 37 is driven by the transmission case 35 and the screw 39 to drive the tool apron positioning block 38 to move to a preset position along the tool apron positioning block guide rail 40; meanwhile, the servo motor cutter shaft rotates 14 to be started, the servo motor cutter shaft rotates 14 to drive the reduction gearbox 11, and the reduction gearbox 11 drives the positioning shaft 29 to enable the cutter shaft 51 to rotate an angle to the welding position of the next cutter seat. Then, the servo motor positioning plate rotation 1 is started to rotate the positioning plate 7 to a working position above the cutter shaft 51.

5. After the operations are completed, the positioning plate 7 is turned on, the middle pedal switch 32 is stepped to rotate the knife shaft, and the welding missing part is checked and subjected to repair welding. The cutter shaft at the right end of the middle pedal switch 32 is stepped to rotate forwards, the cutter shaft at the left end of the middle pedal switch 32 is stepped to rotate backwards, the middle pedal switch 32 is a speed regulating switch, and the speed of the rotating speed is controlled by the stepping switch amplitude. The electric part is controlled by the control platform 34.

6. After all tool holders are welded and the welding quality of the cutter shaft is checked, the left end of the right pedal switch 31 is stepped, the electric push rod servo motor 16 of the electric push rod 15 is started, the push rod of the electric push rod 15 is started to retract, the push rod 25 is rotated to move rightwards by pushing the floating push rod 18 and the push rod connecting sleeve 22, and the positioning shaft 29 is pulled out of the spline sleeve of the cutter shaft 51. And taking down the cutter shaft, and welding the next cutter shaft. The electric part is controlled by the control platform 34.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A welding machine for the cutter shaft of a material crusher is characterized by comprising a tail shaft (6) and a positioning shaft (29) which are used for clamping and driving the cutter shaft to rotate,

wherein, the tail shaft (6) is rotatably arranged on the frame (8),

2. The material pulverizer cutter shaft welding machine according to claim 1, characterized in that the driving mechanism comprises an electric push rod (15), the electric push rod (15) is fixed on a push rod support of the frame (8), a push shaft of the electric push rod (15) is connected with a floating push rod (18) through a third connecting sleeve (17) and a pin, the floating push rod (18) is inserted into a hole of the push rod connecting sleeve (22), two groups of disc springs (19) are arranged between the step of the floating push rod (18) and the push rod connecting sleeve (22), a bolt (21) presses a pressing plate (20) for limiting the push rod connecting sleeve (22) on the floating push rod (18), the right end part of a positioning shaft (29) is fixedly connected with a rotating push rod (25) through a fourth connecting sleeve (26) and a pin, and the rotating push rod (25) is connected with the push rod connecting sleeve (22) through a tapered roller bearing (24) and an end face thrust bearing (23).

3. The material pulverizer cutter shaft welding machine according to claim 2, characterized in that the reduction box (11) is fixed on the frame (8), the pinion shaft (12) is installed in the reduction box (11) through a pair of bearings and two bearing covers, the external spline of the sleeve shaft (28) is inserted into the spline hole of the large gear (27), and the pinion shaft (12) is in meshing transmission with the large gear (27).

4. The material pulverizer cutter shaft welding machine according to claim 3, wherein the laser positioning plate (42) is fixed to the positioning shaft (29) to rotate with the positioning shaft (29), the laser positioning plate (42) has a detection hole, and the laser (42) is fixed to the reduction gear box (11).

5. The mass crusher arbor welder of claim 1, wherein the tail shaft (6) is inserted into the bearing hole of the second bearing seat (5), the first nut (3) secures the tail shaft (6) to the inner race of the bearing of the second bearing seat (5), and the second bearing seat (5) is secured to the tail shaft bracket (48).

6. A machine for welding the cutter shaft of a material crusher according to claim 5, characterized in that the tail shaft servomotor (46) is fixed to the machine frame (8), the output shaft of the tail shaft servomotor (46) is connected to the screw of the screw-nut pair (45) by means of a connecting sleeve (44) and a pin, the nut of the screw-nut pair (45) is fixed in the tail shaft bracket (48), a pair of guide rails (47) is fixed to the bottom plate of the machine frame (8), and the tail shaft bracket (48) is slidably connected to the guide rails (47) to move along the guide rails (47).

7. The material pulverizer knife shaft welding machine of claim 1, further comprising a positioning plate rotatably mounted on the frame, the positioning plate having a knife holder positioning block (38) at a front end thereof;

8. The mass crusher knife shaft welding machine according to claim 1, characterized in that the knife holder servo motor (36) is fixed on the knife holder motor support of the positioning plate (7), both ends of the screw (39) are respectively connected with the inner bearing rings of a pair of UCP202 bearing seats (41), the pair of UCP202 bearing seats (41) are fixed on the positioning plate (7), and the knife holder servo motor (36) is in transmission connection with the screw (39) through the transmission box (35).

9. The material pulverizer cutter shaft welding machine according to claim 1, wherein the transmission case (35) is a gear transmission mechanism, both ends of the transmission case (35) are respectively connected with a screw (39) and an output shaft of the cutter holder servo motor (36), the cutter holder positioning block guide rail (40) is fixed on the front end of the positioning plate (7), the nut mechanism (37) is in threaded transmission connection with the screw (39), the cutter holder positioning block (38) is fixed on the nut mechanism (37), and simultaneously, the cutter holder positioning block (38) is in sliding connection with the cutter holder positioning block guide rail (40) and moves along the cutter holder positioning block guide rail (40).

10. A machine for welding the cutter shafts of material mills according to claim 1, characterized in that a pair of supports (30) for carrying the cutter shafts are fixed to the machine frame (8).