Novel adjustable off-line surfacing self-positioning tool for vertical mill roller sleeve

Abstract

The utility model provides a novel adjustable vertical mill roller sleeve off-line surfacing self-positioning tool which is simple, reliable, quick to disassemble and assemble, good in stability and high in flexibility. The device comprises a main shaft, a lower adjusting device, an upper adjusting device, a spacer sleeve and a handle, the spindle comprises a spindle body and a positioning sleeve; the lower adjusting device comprises a supporting frame and a telescopic mechanism. The support frame comprises a lower support sleeve and three sets of guide mechanisms; each telescopic mechanism is arranged on one guide mechanism so as to drive the lower clamping head to move in the radial direction of the lower supporting sleeve, the lower clamping head comprises a lower clamping position and a lower supporting position, the lower clamping position is used for abutting against an inner cavity of the large end of the roller sleeve, and the lower supporting position is used for supporting the lower end face of the large end of the roller sleeve; the upper adjusting device and the lower adjusting device are similar in structure; the positioning sleeve, the lower adjusting device, the upper adjusting device, the spacer sleeve and the handle are arranged on the main shaft body from bottom to top; the rotating handle provides pressing force through screwing of threads, and the two end faces of the roller sleeve are clamped through the lower adjusting device and the upper adjusting device respectively.

Description

Technical Field

[0001] This utility model relates to the technical field of vertical mill roller sleeve overlay welding equipment, specifically a new type of adjustable vertical mill roller sleeve offline overlay welding self-positioning tooling. Background Technology

[0002] Vertical mill roller sleeves are widely used in the grinding of cement clinker, slag, and construction waste. The grinding media between the grinding roller and the grinding disc has high hardness, which requires the roller sleeve grinding surface to have high strength and wear resistance. Based on this characteristic, a weld overlay layer with high hardness and good wear resistance needs to be welded onto the roller sleeve surface. During long-term use, the weld overlay layer will gradually wear down. When it wears down to a certain extent, it needs to be repaired by weld overlay. The repair process requires the use of special tooling for support and special weld overlay equipment to complete the repair work. Due to the large size and heavy weight of the roller sleeve, and the fact that the roller sleeve is a sleeve-shaped part, it is difficult to fix it with ordinary tooling.

[0003] The quality of roller sleeve surfacing depends on the concentricity of the roller sleeve and the rotation center of the surfacing equipment. The surfacing equipment requires specialized tooling fixtures for centering. Installation errors and excessive roller sleeve weight can cause eccentric rotation, preventing excessive ellipticity in the surfacing shape and resulting in severe equipment vibration, which in turn affects the surfacing quality. Traditional specialized tooling suffers from problems such as inaccurate manual centering, difficult operation, and high time and labor costs, severely impacting surfacing efficiency.

[0004] In addition, the existing roller sleeve welding fixtures are made individually according to the inner diameter of each roller sleeve model and cannot be adjusted. That is, each fixture can only install a fixed model of roller sleeve, which has poor versatility. When it is necessary to weld roller sleeves of different sizes, the corresponding fixtures need to be changed, which increases the workload of workers. Furthermore, since there are many different models of roller sleeves produced, there are also many different types of fixtures that need to be made, which increases the cost of fixture manufacturing and also causes the fixtures to occupy a lot of space. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new type of adjustable vertical mill roller sleeve offline welding self-positioning tool that is simple, reliable, quick to assemble and disassemble, has good stability and high flexibility. It can quickly align and reliably position and clamp the roller sleeve. It can be applied to the "welding frame welding equipment" for offline welding of roller sleeves.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A novel adjustable vertical mill roller sleeve offline welding self-positioning fixture includes a main shaft 3, a lower adjustment device 4, an upper adjustment device 5, a spacer sleeve 6, and a handle 7.

[0008] The spindle 3 includes a spindle body 3.1 and a positioning sleeve 3.2; the inner cavity of the positioning sleeve 3.2 is in sliding contact with the spindle body 3.1, the positioning sleeve 3.2 is fitted onto the spindle body 3.1, and is locked and fixed to the spindle body 3.1 by a set screw 3.5;

[0009] The lower adjustment device 4 includes a support frame 4.1 and a telescopic mechanism 4.2; the support frame 4.1 includes a lower support sleeve 4.3 and three sets of guide mechanisms 4.4; the lower support sleeve 4.3 slides in axial contact with the main shaft 3.1 via a flat key and transmits torque in the circumferential direction; the guide mechanisms 4.4 are evenly distributed circumferentially on the lower support sleeve 4.3 with the lower support sleeve 4.3 as the center; each telescopic mechanism 4.2 is set on a guide mechanism 4.4 to drive the lower clamping head 4.15 to move radially on the lower support sleeve 4.3, the lower clamping head 4.15 includes a lower clamping position 41 and a lower support position 42, wherein the lower clamping position 41 is used to press against the inner cavity 101 of the large end of the roller sleeve, and the lower support position 42 is used to support the lower end face 102 of the large end of the roller sleeve 100;

[0010] The upper adjustment device 5 and the lower adjustment device 4 have similar structures, but the upper support sleeve 5.3 in the upper adjustment device 5 only slides in axial contact with the main shaft 3.1. The upper clamping position 51 in the upper adjustment device 5 is used to hold the inner cavity 103 of the small end of the roller sleeve, and the upper support position 52 in the upper adjustment device 5 is used to support the upper end face 104 of the small end of the roller sleeve 100.

[0011] The main shaft 3.1 is provided with an external thread that mates with the intermediate ring 7.1 of the handle 7; the positioning sleeve 3.2, the lower adjusting device 4, the upper adjusting device 5, the spacer sleeve 6, and the handle 7 are arranged on the main shaft 3.1 from bottom to top; the lower end face of the lower support sleeve 4.3 in the lower adjusting device 4 contacts the positioning sleeve 3.2 to achieve limiting; the spacer sleeve 6 is fitted on the main shaft 3.1 and has sliding contact with the main shaft 3.1, and the two ends of the spacer sleeve 6 contact the upper support sleeve 5.3 and the intermediate ring 7.1 in the upper adjusting device 5, respectively. The handle rod 7.2 of the handle 7 is rotated to provide clamping force by tightening the thread, and the two ends of the roller sleeve 100 are clamped by the lower adjusting device 4 and the upper adjusting device 5, respectively.

[0012] The aforementioned novel adjustable vertical mill roller sleeve offline welding self-positioning fixture includes a telescopic mechanism 4.2 comprising a lead screw 4.12, a lead screw nut 4.13, a guide shaft 4.14, a lower clamp 4.15, a retaining ring 4.17, and a baffle 4.18. The lead screw nut 4.13 is threadedly connected to the lead screw 4.12 and is mounted on the guide mechanism 4.4. The lead screw 4.12 has a square head at its tail and a shaft section at its head that passes through the baffle 4.18. The end of the lead screw 4.12 is fixed to the retaining ring 4.17. The baffle 4.18 has a groove for mounting the retaining ring 4.17 to achieve limiting and is fixed to the lower clamp 4.15. The guide shaft 4.14 is in sliding contact with the inner wall of the guide sleeve 4.8, and one end of the guide shaft 4.14 is fixed to the lower clamp 4.15.

[0013] The aforementioned novel adjustable vertical mill roller sleeve offline welding self-positioning fixture, the telescopic mechanism 4.2 also includes a scale 4.19 and a partition 4.20; the scale 4.19 is installed on the periphery of the lead screw 4.12, one end of the scale 4.19 is fixed on the lead screw nut 4.13, and the partition 4.20 is fixed on the lower clamp 4.15, and a groove is provided on the partition 4.20 to slide in contact with the scale 4.19.

[0014] The aforementioned novel adjustable vertical mill roller sleeve offline welding self-positioning fixture has an inclined stop 4.16 on the lower clamp 4.15 in the lower adjustment device 4. The outer side of the stop 4.16, which is inclined to the axis of the main shaft 3, serves as the lower clamping position 41 to hold the inner cavity 101 of the large end of the roller sleeve. The upper clamping position 51 of the upper clamp 5.15 in the upper adjustment device 5, which holds the inner cavity 103 of the small end of the roller sleeve, is parallel to the axis of the main shaft 3.

[0015] The aforementioned novel adjustable vertical mill roller sleeve offline welding self-positioning fixture, the telescopic mechanism 4.2 also includes a threaded protective sleeve 4.21 and a shaft protective sleeve 4.22; the threaded protective sleeve 4.21 is fixed on one side of the lead screw nut 4.13 and fitted on the lead screw 4.12, and the shaft protective sleeve 4.22 is fixed on the guide sleeve 4.8 and fitted on the guide shaft 4.14.

[0016] The aforementioned novel adjustable vertical mill roller sleeve offline welding self-positioning fixture includes a guide mechanism 4.4 comprising a sleeve 4.6, a fixed sleeve 4.7, and a guide sleeve 4.8. The fixed sleeve 4.7 is installed at the end of the sleeve 4.6, and the guide sleeve 4.8 is connected to the inner cavity of the fixed sleeve 4.7.

[0017] The aforementioned novel adjustable vertical mill roller sleeve offline welding self-positioning fixture has bearings 3.4 installed at both ends of the main shaft 3.1;

[0018] The aforementioned novel adjustable vertical mill roller sleeve offline overlay welding self-positioning tooling also includes a base 1, a support seat 2, and a double column welding frame 200; the two columns of the welding frame 200 are set at different heights at a certain angle, and the tilt angle is the same as the roller sleeve taper, and a split bearing seat 201 is set at the upper end of the column.

[0019] The base 1 is used as a temporary bottom support when the roller sleeve 100 is installed vertically, and the support seat 2 is used as a bottom support when the tooling is installed vertically with the roller sleeve 100. The upper part of the support seat 2 is connected to the lower adjustment device 4.

[0020] A novel method for operating an adjustable vertical mill roller sleeve offline welding self-positioning fixture includes the following steps:

[0021] 1) Use the lifting lugs on the lower adjustment device to keep the welding fixture horizontal and lift it steadily until the non-drive end of the spindle passes through the center hole of the top plate in the base. Use a tape measure to measure the distance between the fixture and the center hole of the base at multiple points, and try to keep them concentric until the lower plane of the 3 sets of support seats contacts the upper plane of the top plate.

[0022] 2) Use a measuring tape to measure the inner diameter of the large and small ends of the roller sleeve. Rotate the three sets of screws of the lower adjustment device to extend the chuck until the outer diameter of the chuck support position in the lower adjustment device is greater than the inner diameter of the large end of the roller sleeve. Rotate the three sets of screws of the upper adjustment device to retract the chuck until the outer diameter of the chuck support position in the upper adjustment device is less than the inner diameter of the small end of the roller sleeve, ensuring that the inner cavity of the roller sleeve can smoothly pass through the chuck in the upper adjustment device.

[0023] 3) Use slings to lift the roller sleeve horizontally and smoothly. Insert it from the top of the main shaft drive end and fit it onto the tooling as a whole. Use a tape measure to measure the distance between the tooling and the main shaft at multiple points to "coarsely adjust" the center until the lower plane of the large end of the roller sleeve contacts the chuck support position. Rotate the three sets of screws of the lower adjustment device to extend the chuck until the circumferential clamping position of the stop block of the three sets of chucks in the lower adjustment device presses against the inner cavity of the large end of the roller sleeve.

[0024] 4) Use the lifting lugs on the upper adjustment device to keep it horizontal and lift it steadily until the chuck support position contacts the upper plane of the small end of the roller sleeve. Rotate the three sets of screws on the upper adjustment device to extend the chuck until the three sets of chucks on the upper adjustment device are in circumferential clamping positions and press against the inner cavity of the small end of the roller sleeve.

[0025] 5) Rotate the lead screws on the upper and lower adjustment devices respectively until the chuck clamps against the inner cavities at both ends of the roller sleeve for "fine adjustment" centering, keeping the scale values ​​consistent and locking them;

[0026] 6) Turn the handle to tighten the threads while providing downward clamping force. The roller sleeve is vertically clamped at both ends through the spacer sleeve and the upper and lower two sets of adjustment devices, which can effectively fasten the roller sleeve and make the tooling and roller sleeve a whole.

[0027] 7) The hoisting fixture and roller sleeve assembly are lifted as a whole and turned over. After tilting the assembly at a certain angle until the roller surface is flush, the assembly is connected to the welding frame welding equipment, and the bearings at both ends of the main shaft are stably installed in the bearing seats.

[0028] The beneficial effects of this utility model are:

[0029] All connecting links of the self-positioning welding fixture adopt a detachable structure, which facilitates on-site installation and adjustment. The fixture is equipped with two sets of adjustment devices. The extension length of the fixture can be adjusted by simply rotating the screw, which can meet the clamping requirements of different models of roller sleeve welding. It is simple to operate and has strong applicability and versatility. By unifying the scale values ​​of each scale, the extension length of the fixture can be synchronized, which is easy to observe and has high precision in adjusting the center. It can achieve the purpose of adjusting the concentricity of the two ends of the fixture and the roller sleeve, ensuring that the center of the roller sleeve and the welding fixture is coaxial. It is easy to install and improves installation efficiency. Only one set of fixtures can meet the welding requirements of most models of vertical mill roller sleeves, saving manufacturing costs, and the fixture does not occupy space. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the "vertical installation" structure of the self-positioning tooling for welding overlay.

[0031] Figure 2 This is a schematic diagram of the "tilted installation" structure of the self-positioning tooling for welding overlay.

[0032] Figure 3 This is the main view of the "vertical installation" structure of the self-positioning fixture for welding overlay.

[0033] Figure 4 This is a top view of the "vertical installation" structure of the self-positioning fixture for welding overlay.

[0034] Figure 5 This is a schematic diagram of the lower adjustment device.

[0035] Figure 6 This is a schematic diagram of the upper adjustment device. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings:

[0037] like Figure 1 , Figure 2 As shown, a novel adjustable vertical mill roller sleeve offline welding self-positioning fixture includes a base 1, a support seat 2, a main shaft 3, a lower adjustment device 4, an upper adjustment device 5, a spacer sleeve 6, and a handle 7.

[0038] The base 1 serves as a temporary bottom support when the roller sleeve 100 is installed vertically. The support seat 2 serves as a bottom support when the tooling is vertically fitted onto the roller sleeve 100. The upper part of the support seat 2 is bolted together to connect to the lower adjustment device 4. The main shaft 3 is used for auxiliary transmission and has good strength and rigidity to provide stable support for the roller sleeve 100. The drive end of the main shaft 3 is connected to the output shaft of the geared motor 203 to achieve torque transmission. The two sets of adjustment devices, namely the upper adjustment device 5 and the lower adjustment device 4, are used as a combination of fixtures for the tooling. They are arranged at intervals and fitted onto the main shaft 3. The two sets of adjustment devices respectively clamp both ends of the roller sleeve 100 to adjust the center of the upper and lower ends of the roller sleeve, ensuring that the roller sleeve is coaxial with the center of the welding tooling. The outer surface of the vertical mill roller sleeve 100 is a conical surface. Both the inner and outer surfaces are machined by a machine tool to ensure the concentricity of the body. When the tooling is installed, the lower adjustment device 4 is used to support the inner cavity 101 and end face 102 of the large end of the roller sleeve, and the upper adjustment device 5 is used to support the inner cavity 102 and end face 103 of the small end of the roller sleeve. When the inner cavities of the upper and lower ends of the roller sleeve 100 are both at the center of the tooling spindle, it can be considered that the roller sleeve is coaxial with the center of the welding tooling.

[0039] like Figure 2 , Figure 3 As shown, the base 1 comprises a large-diameter circular plate 1.1, a top plate (small-diameter circular plate) 1.2, and a column 1.3. The two circular plates are concentric and spaced apart vertically. The top plate (small-diameter circular plate) 1.2 faces upward and includes a central circular hole for fixing the support base 2. The large-diameter circular plate 1.1 faces downward and is thickened to ensure firm fixation to the ground foundation. The middle column 1.3 is supported by H-steel and is arranged in three groups at 120° circumferential angles around the circular plate. The structure is strengthened by integral welding.

[0040] The main shaft 3 includes a main shaft body 3.1, a positioning sleeve 3.2, a coupling 3.3, and bearings 3.4. The main shaft body 3.1 is made of 40Cr thick-walled steel pipe and undergoes heat treatment. It is used for auxiliary transmission and provides stable support for the roller sleeve 100 with good strength and rigidity. The coupling 3.3 has a boss at its head that fits tightly with the inner hole of the main shaft body 3.1. The driving end of the main shaft body 3.1 is fitted with the coupling 3.3 by a convex-concave insertion fit and bolt connection. The tail end of the coupling has a keyway that is tightly inserted and fixed to the output shaft of the reduction motor 203. The non-driving end of the main shaft body 3.1 has a keyway that matches the inner cavity of the lower support sleeve 4.3 of the lower adjustment device 4. A flat key is installed to tightly connect the main shaft 3 to the lower adjustment device 4, achieving torque transmission. The inner cavity of the positioning sleeve 3.2 is in sliding contact with the spindle body 3.1. The positioning sleeve 3.2 is fitted onto the non-drive end shoulder of the spindle body 3.1 and locked and fixed to the spindle body 3.1 by the set screw 3.5 (the positioning sleeve 3.2 can be removed by loosening the set screw 3.5).

[0041] The spindle body 3.1 and the handle intermediate ring 7.1 are connected by threads. The spindle body 3.1 has an external thread that matches the inner diameter of the handle intermediate ring 7.1. The inner cavity of the spacer sleeve 6 is in sliding contact with the spindle body 3.1. Two lifting lugs 6.1 arranged at 180° are welded to the outside of the spacer sleeve 6 for easy hoisting. The spacer sleeve 6 is fitted onto the spindle body 3.1 to isolate the handle 7 from direct contact with the upper adjusting device 5. Rotating the handle rod 7.2 provides clamping force through thread tightening. The two sets of upper and lower adjusting devices clamp the two ends of the roller sleeve 100 respectively, which can effectively fasten the roller sleeve, making the tooling and roller sleeve a whole, and easy to disassemble. A conductive device 202 is installed on the non-drive end of the spindle body 3.1 to meet welding safety requirements. Bearings 3.4 are installed on the shoulders of both ends of the main shaft 3.1. They are self-aligning roller bearings and are installed in the bearing seats 201 at both ends of the double column welding frame 200. The bearing seats are split to facilitate the overall assembly and disassembly of the tooling main shaft. The bearing seats 201 are fixed to the column platforms at both ends of the welding frame 200 by bolt connection. The columns at both ends of the welding frame 200 are set at a certain angle, and the tilt angle is the same as the tapered angle of the roller sleeve.

[0042] like Figure 4 , Figure 5 As shown, the lower adjustment device 4 includes a support frame 4.1 and a telescopic mechanism 4.2.

[0043] The support frame 4.1 comprises a lower support sleeve 4.3 and three sets of guide mechanisms 4.4. The inner cavity of the lower support sleeve 4.3 is in sliding contact with the main spindle body 3.1. The lower support sleeve 4.3 is fitted onto the main spindle body 3.1 and is limited by a positioning sleeve 3.2 on the main spindle body 3.1. The inner cavity of the lower support sleeve 4.3 has a keyway that mates with the shaft section of the main spindle body 3.1, and is tightly connected by installing a flat key 4.5 to achieve torque transmission. The guide mechanisms 4.4 are arranged circumferentially at 120° around the lower support sleeve 4.3 and are fixed by welding. The guide mechanisms 4.4 include a sleeve 4.6, a fixed sleeve 4.7, and a guide sleeve 4.8. The fixed sleeve 4.7 is installed at the end of the sleeve 4.6 and fixed by welding. The guide sleeve 4.8 is fitted into the inner cavity of the fixed sleeve 4.7 by bolts.

[0044] The sleeve 4.6 is provided with a lifting lug 4.9, a support plate 4.10, and a fixing plate 4.11 on its side, and is fixed by welding. The lifting lug 4.9 is used for lifting the tooling. Two sets of support plates 4.10 are fixed to both sides of the sleeve 4.6. The support plate 4.10 is provided with limit holes and screw holes for connecting with the support base 2. The fixing plate 4.11 is provided with limit holes and screw holes for connecting with the lead screw nut 4.13.

[0045] The telescopic mechanism 4.2 is provided with 3 sets arranged in a 120° circumferential direction and fitted into the guide sleeve 4.8 of the guide mechanism 4.4. The telescopic mechanism 4.2 includes a lead screw 4.12, a lead screw nut 4.13, a guide shaft 4.14, a lower clamp 4.15, a stop block 4.16, a retaining ring 4.17, a baffle 4.18, a scale 4.19, a partition 4.20, a threaded protective sleeve 4.21, and a shaft protective sleeve 4.22.

[0046] The lead screw nut 4.13 is threadedly connected to the lead screw 4.12. The lead screw 4.12 has a trapezoidal thread and is fitted inside the lead screw nut 4.13. A threaded protective sleeve 4.21 is fixed to one side of the lead screw nut 4.13 and fitted onto the lead screw 4.12 to prevent spatter generated during welding. The lead screw nut 4.13 is bolted to the sleeve fixing plate 4.11. The tail of the lead screw 4.12 has a square head for operating a wrench. The head of the lead screw 4.12 has a shaft section that passes through the baffle 4.18. The end of the lead screw 4.12 has a shoulder and a screw hole, which is bolted to the retaining ring 4.17. The baffle 4.18 has a groove for installing the retaining ring 4.17 for limiting its position and is bolted to the lower clamp 4.15. The guide shaft 4.14 has sliding contact with the inner wall of the guide sleeve 4.8 and is fitted inside the guide sleeve 4.8. The shaft protective sleeve 4.22 is fixed to the guide sleeve 4.8 and fitted onto the guide shaft 4.14 to block spatter generated during welding. One end of the guide shaft 4.14 has a boss and screw hole that mate with the keyway of the lower clamp 4.15, and is fixed to the lower clamp 4.15 by bolts. One side of the stop block 4.16 has an inclined surface that mates with the conical surface 101 of the inner cavity of the large end of the roller sleeve, and is fixed to the lower clamp 4.15 by bolts for easy disassembly and replacement. The scale 4.19 is installed around the lead screw 4.12. The fixed end of the scale 4.19 is fixed to the lead screw nut 4.13 by bolts, and the movable end of the scale 4.19 passes through the partition plate 4.20. The partition plate 4.20 is fixed to the lower clamp 4.15 by bolts. The partition plate 4.20 has a groove for guiding the extension and retraction of the scale 4.19, and the groove of the partition plate 4.20 slides in contact with the scale 4.19. Three sets of scales 4.19 are respectively set on three sets of telescopic mechanisms 4.2 arranged in a 120° circumferential direction. In use, the screw 4.12 is rotated by a wrench, and the screw nut 4.13 limits the movement. The guide shaft 4.14 guides the movement within the guide sleeve 4.8, thereby driving the lower clamp 4.15 to extend and retract. The lower clamp 4.15 includes a clamping position (outside the stop block 4.16) 41 and a lower support position 42. The lower clamping position 41 is used to hold the inner cavity 101 of the large end of the roller sleeve, and the lower support position 42 is used to clamp the plane 102 of the large end of the roller sleeve. The three sets of lower clamps 4.15 support the inner cavity 101 and the end face 102 of the large end of the roller sleeve in a 120° circumferential direction. The extension and retraction length of the lower clamps 4.15 can be synchronized by using the same scale value of the scale 4.19, so as to achieve the purpose of adjusting the tooling to be concentric with the large end of the roller sleeve.

[0047] like Figure 4 , Figure 6 As shown, the upper adjustment device 5 comprises a support frame 5.1 and a telescopic mechanism 5.2.

[0048] The support frame 5.1 includes an upper support sleeve 5.3 and three sets of guide mechanisms 5.4. The inner cavity of the upper support sleeve 5.3 is in sliding contact with the main shaft 3.1, and the upper support sleeve 5.3 is fitted onto the main shaft 3.1. The guide mechanisms 5.4 are arranged circumferentially at 120° with the upper support sleeve 5.3 as the center and are fixed by welding. The guide mechanism 5.4 includes a sleeve 5.6, a fixed sleeve 5.7, and a guide sleeve 5.8. The fixed sleeve 5.7 is installed at the end of the sleeve 5.6 and fixed by welding. The guide sleeve 5.8 is fitted into the inner cavity of the fixed sleeve 5.7 by bolt connection. The sleeve 5.6 has a lifting lug 5.9 and a fixing plate 5.11 on its side and is fixed by welding. The lifting lug 5.9 is used for lifting the tooling, and the fixing plate 5.11 has a limit and screw holes for connecting with the lead screw nut 5.13.

[0049] The telescopic mechanism 5.2 consists of three sets arranged circumferentially at 120° and fitted inside the guide sleeves 5.8 of the guide mechanism 5.4. The telescopic mechanism 5.2 comprises a lead screw 5.12, a lead screw nut 5.13, a guide shaft 5.14, an upper clamp 5.15, a retaining ring 5.17, a baffle 5.18, a scale 5.19, a partition 5.20, a threaded protective sleeve 5.21, and a shaft protective sleeve 5.22. The lead screw nut 5.13 is threadedly connected to the lead screw 5.12, which has a trapezoidal thread. The lead screw 5.12 is fitted inside the lead screw nut 5.13. The threaded protective sleeve 5.21 is fixed to one side of the lead screw nut 5.13 and fitted onto the lead screw 5.12 to prevent spatter generated during welding. The lead screw nut 5.13 is bolted to the sleeve fixing plate 5.11. The lead screw 5.12 has a square head at its tail for operating a wrench. The head of the lead screw 5.12 has a shaft section that passes through the baffle 5.18. The end of the lead screw 5.12 has a shoulder and a screw hole, which are bolted to the retaining ring 5.17. The baffle 5.18 has a groove for mounting the retaining ring 5.17 for limiting its position, and is bolted to the upper collet 5.15. The guide shaft 5.14 slides in contact with the inner wall of the guide sleeve 5.8. The guide shaft 5.14 is fitted inside the guide sleeve 5.8. The shaft protective sleeve 5.22 is fixed to the guide sleeve 5.8 and fitted onto the guide shaft 5.14 to prevent spatter generated during welding. One end of the guide shaft 5.14 has a boss and a screw hole that mate with the keyway of the upper collet 5.15, and is bolted to the upper collet 5.15. A scale 5.19 is installed around the lead screw 5.12, and its fixed end is bolted to the lead screw nut 5.13. The movable end of the scale 5.19 passes through the partition 5.20, which is bolted to the upper clamp 5.15. The partition 5.20 has a groove for guiding the extension and retraction of the scale 5.19, and the groove slides in contact with the scale 5.19. Three sets of scales 5.19 are respectively mounted on three sets of telescopic mechanisms 5.2 arranged circumferentially at 120°. In use, a wrench is used to rotate the lead screw 5.12, which is limited by the lead screw nut 5.13. The guide shaft 5.14 guides the mechanism within the guide sleeve 5.8, thereby driving the upper clamp 5.15 to extend and retract. The clamping head 5.13 includes an upper clamping position 51 and an upper support position 52. The upper clamping position 51 is used to hold the inner cavity 102 of the small end of the roller sleeve, and the support position is used to clamp the plane 103 of the small end of the roller sleeve. The three upper clamping heads 5.15 provide 120° circumferential support to the inner cavity 102 and the end face 103 of the small end of the roller sleeve. The extension and retraction length of the upper clamping heads 5.15 can be synchronized by the scale value of the unified scale 5.19, so as to achieve the purpose of adjusting the tooling to be concentric with the small end of the roller sleeve.

[0050] A novel method for operating an adjustable vertical mill roller sleeve offline welding self-positioning fixture includes the following steps:

[0051] 1) Use the lifting lugs 4.9 on the lower adjustment device 4 to keep the welding fixture horizontal and lift it steadily until the non-drive end of the spindle 3 passes through the center hole of the top plate 1.2 of the base 1. Use a tape measure to measure the distance between the fixture and the inner hole of the base at multiple points, and try to keep them concentric. Then, the lower plane of the 3 sets of support seats 2 contacts the upper plane of the top plate 1.2 of the base 1.

[0052] 2) Use a measuring tape to measure the inner diameter of the large and small ends of the roller sleeve 100. Rotate the three sets of screws 4.12 of the lower adjustment device 4 to extend the lower clamp 4.15 until the outer diameter of the lower clamping position 41 of the lower clamp 4.15 is smaller than the inner diameter 101 of the large end of the roller sleeve. Rotate the three sets of screws 5.12 of the upper adjustment device 5 to retract the upper clamp 5.15 until the outer diameter of the upper support position 52 of the upper clamp 5.15 is smaller than the inner diameter 103 of the small end of the roller sleeve, ensuring that the inner cavity of the roller sleeve can smoothly pass through the clamp.

[0053] 3) Use slings to lift the roller sleeve 100 horizontally and smoothly, insert it from the top of the drive end of the main shaft 3 and slide it down and fit it onto the tooling as a whole. Use a tape measure to measure the distance between the tooling and the main shaft at multiple points to "coarsely adjust" the center until the lower plane 102 of the large end of the roller sleeve contacts the lower support position 42 of the lower clamp 4.15. Rotate the three sets of screws 4.12 of the lower adjustment device to extend the lower clamp 4.15 until the inclined circumferential clamping position of the three sets of clamp blocks 4.16 presses against the inner cavity 101 of the large end of the roller sleeve.

[0054] 4) Use the lifting lugs 5.9 on the upper adjustment device 5 to keep it horizontal and lift it steadily until the upper support position 52 contacts the upper plane 104 of the small end of the roller sleeve. Rotate the three sets of screws 5.12 of the upper adjustment device to extend the upper clamps 5.15 until the three sets of upper clamps 5.15 are in the circumferential clamping position and press against the inner cavity 103 of the small end of the roller sleeve.

[0055] 5) Rotate the lead screws on the upper and lower adjustment devices respectively until the chuck clamps against the inner cavities at both ends of the roller sleeve for "fine adjustment" centering, keeping the scale values ​​consistent and locking them;

[0056] 6) Turn the handle 7 to tighten the thread and provide downward clamping force. The roller sleeve 100 is vertically clamped by the spacer sleeve 6 and the two sets of upper and lower adjustment devices, which can effectively fasten the roller sleeve and make the tooling and roller sleeve into a whole.

[0057] 7) The hoisting fixture and roller sleeve assembly are lifted as a whole and turned over. After tilting the assembly at a certain angle until the roller surface is flush, the assembly is connected to the welding frame welding equipment 200. The bearings 3.4 at both ends of the main shaft are stably installed in the bearing seats 201.

[0058] The beneficial effects of this utility model are:

[0059] All connecting links of the self-positioning welding fixture adopt a detachable structure, which facilitates on-site installation and adjustment. The fixture is equipped with two sets of adjustment devices. The extension length of the fixture can be adjusted by simply rotating the screw, which can meet the clamping requirements of different models of roller sleeve welding. It is simple to operate and has strong applicability and versatility. By unifying the scale values ​​of each scale, the extension length of the fixture can be synchronized, which is easy to observe and has high precision in adjusting the center. It can achieve the purpose of adjusting the concentricity of the two ends of the fixture and the roller sleeve, ensuring that the center of the roller sleeve and the welding fixture is coaxial. It is easy to install and improves installation efficiency. Only one set of fixtures can meet the welding requirements of most models of vertical mill roller sleeves, saving manufacturing costs, and the fixture does not occupy space.

[0060] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered to fall within the scope of patent protection determined by the submitted claims.

Claims

1. A novel adjustable vertical mill roller sleeve offline welding self-positioning fixture, characterized in that: Includes main shaft (3), lower adjustment device (4), upper adjustment device (5), spacer sleeve (6), and handle (7); The spindle (3) includes a spindle body (3.1) and a positioning sleeve (3.2); the inner cavity of the positioning sleeve (3.2) is in sliding contact with the spindle body (3.1), the positioning sleeve (3.2) is fitted onto the spindle body (3.1) and locked and fixed to the spindle body (3.1) by a set screw (3.5); The lower adjustment device (4) includes a support frame (4.1) and a telescopic mechanism (4.2); the support frame (4.1) includes a lower support sleeve (4.3) and three sets of guide mechanisms (4.4); the lower support sleeve (4.3) slides in axial contact with the main shaft (3.1) through a flat key and transmits torque in the circumferential direction; the guide mechanisms (4.4) are evenly distributed in the circumferential direction on the lower support sleeve (4.3) with the lower support sleeve (4.3) as the center; each telescopic mechanism (4.2) is set on a guide mechanism (4.4) to drive the lower clamping head (4.15) to move radially on the lower support sleeve (4.3), the lower clamping head (4.15) includes a lower clamping position (41) and a lower support position (42), wherein the lower clamping position (41) is used to hold the inner cavity (101) of the large end of the roller sleeve, and the lower support position (42) is used to support the lower end face (102) of the large end of the roller sleeve (100). The upper adjustment device (5) and the lower adjustment device (4) have similar structures, but the upper support sleeve (5.3) in the upper adjustment device (5) only slides in axial contact with the main shaft (3.1), the upper clamping position (51) in the upper adjustment device (5) is used to hold the inner cavity (103) of the small end of the roller sleeve, and the upper support position (52) in the upper adjustment device (5) is used to support the upper end face (104) of the small end of the roller sleeve (100). The main shaft (3.1) is provided with an external thread that mates with the intermediate ring (7.1) of the handle (7); the positioning sleeve (3.2), the lower adjustment device (4), the upper adjustment device (5), the spacer sleeve (6), and the handle (7) are arranged on the main shaft (3.1) from bottom to top; the lower end face of the lower support sleeve (4.3) in the lower adjustment device (4) contacts the positioning sleeve (3.2) to achieve a limit; the spacer sleeve (6) is fitted on the main shaft (3.1) and has a sliding contact with the main shaft (3.1). The two ends of the spacer sleeve (6) contact the upper support sleeve (5.3) and the intermediate ring (7.1) in the upper adjustment device (5) respectively. The handle rod (7.2) of the handle (7) is rotated to provide a clamping force by tightening the thread, and the two ends of the roller sleeve (100) are clamped by the lower adjustment device (4) and the upper adjustment device (5) respectively.

2. The novel adjustable vertical mill roller sleeve offline welding self-positioning fixture as described in claim 1, characterized in that: The telescopic mechanism (4.2) includes a lead screw (4.12), a lead screw nut (4.13), a guide shaft (4.14), a lower clamp (4.15), a retaining ring (4.17), and a baffle (4.18). The lead screw nut (4.13) is threadedly connected to the lead screw (4.12) and is installed on the guide mechanism (4.4). The tail of the lead screw (4.12) is provided with a square head, and the head of the lead screw (4.12) is provided with a shaft section that passes through the baffle (4.18). At the same time, the end of the lead screw (4.12) is fixed to the retaining ring (4.17). The baffle (4.18) is provided with a groove for installing the retaining ring (4.17) to achieve the limit and is fixed to the lower clamp (4.15). The guide shaft (4.14) and the inner wall of the guide sleeve (4.8) are in sliding contact, and one end of the guide shaft (4.14) is fixed to the lower clamp (4.15).

3. The novel adjustable vertical mill roller sleeve offline welding self-positioning fixture as described in claim 2, characterized in that: The telescopic mechanism (4.2) also includes a scale (4.19) and a partition (4.20); the scale (4.19) is installed on the periphery of the lead screw (4.12), one end of the scale (4.19) is fixed on the lead screw nut (4.13), and the partition (4.20) is fixed on the lower clamp (4.15). The partition (4.20) has a groove that slides in contact with the scale (4.19).

4. The novel adjustable vertical mill roller sleeve offline welding self-positioning fixture as described in claim 2, characterized in that: An inclined stop (4.16) is provided on the lower clamp (4.15) of the lower adjustment device (4). The outer side of the stop (4.16) inclined to the axis of the main shaft (3) serves as the lower clamping position (41) to hold the inner cavity (101) of the large end of the roller sleeve. The upper clamping position (51) of the upper clamp (5.15) of the upper adjustment device (5) is parallel to the axis of the main shaft (3) to hold the inner cavity (103) of the small end of the roller sleeve.

5. The novel adjustable vertical mill roller sleeve offline welding self-positioning fixture as described in claim 2, characterized in that: The telescopic mechanism (4.2) also includes a threaded protective sleeve (4.21) and a shaft protective sleeve (4.22); the threaded protective sleeve (4.21) is fixed on one side of the lead screw nut (4.13) and fitted onto the lead screw (4.12), and the shaft protective sleeve (4.22) is fixed on the guide sleeve (4.8) and fitted onto the guide shaft (4.14).

6. The novel adjustable vertical mill roller sleeve offline welding self-positioning fixture as described in claim 1, characterized in that: The guiding mechanism (4.4) includes a sleeve (4.6), a fixed sleeve (4.7), and a guide sleeve (4.8). The fixed sleeve (4.7) is installed at the end of the sleeve (4.6), and the guide sleeve (4.8) is connected to the inner cavity of the fixed sleeve (4.7).

7. The novel adjustable vertical mill roller sleeve offline welding self-positioning fixture as described in claim 1, characterized in that: Bearings (3.4) are installed at both ends of the main spindle (3.1).

8. The novel adjustable vertical mill roller sleeve offline welding self-positioning fixture as described in claim 7, characterized in that: It also includes a base (1), a support seat (2), and a double-column welding frame (200); the two columns of the welding frame (200) are set at different heights at a certain angle, and the tilt angle is the same as the roller sleeve taper. A split bearing seat (201) is set at the upper end of the column. The base (1) is used as a temporary bottom support when the roller sleeve (100) is installed vertically, and the support seat (2) is used as a bottom support when the tooling is vertically fitted with the roller sleeve (100). The upper part of the support seat (2) is connected to the lower adjustment device (4).

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