Positioning and clamping method during surfacing of vertical mill roller sleeve

Abstract

The invention provides a positioning and clamping method during surfacing of a vertical mill roller sleeve, which can quickly align the roller sleeve and reliably position and clamp the roller sleeve, is simple and convenient, has good universality, and comprises the following steps: hoisting a tool assembled by a supporting seat, a main shaft, a lower adjusting device, an upper adjusting device, a spacer sleeve and a handle, keeping the main shaft vertical, and placing the main shaft on a base; the roller sleeve is stably lifted in a horizontal state, penetrates through the upper end of the main shaft and is integrally sleeved on the tool downwards until the lower plane of the large end of the roller sleeve is in contact with the supporting position, and telescopic mechanisms of the lower adjusting devices are respectively adjusted to enable three groups of clamping heads to extend out to abut against an inner cavity of the large end of the roller sleeve; the upper adjusting device is kept in a horizontal state and stably lifted to the clamping head supporting position to make contact with the upper plane of the small end of the roller sleeve, and a telescopic mechanism of the upper adjusting device is adjusted to enable three sets of clamping heads to abut against an inner cavity of the small end of the roller sleeve; the handle is rotated to vertically clamp the two end faces of the roller sleeve through the spacer sleeve, the lower adjusting device and the upper adjusting device to fasten the roller sleeve, so that the tool and the roller sleeve form a combined body.

Description

Technical Field

[0001] The invention relates to the technical field of vertical mill roller sleeve surfacing, in particular to a method for positioning and clamping a roller sleeve during surfacing welding of a vertical mill roller sleeve.

[0002] Background Requirements

[0003] Vertical mill roller sleeves are widely used in the grinding of cement clinker, slag and construction waste. The grinding medium between the grinding roller and the grinding disc has a high hardness, so this requires the roller sleeve grinding surface to have high strength and wear resistance. According to this characteristic, a surfacing layer with high hardness and good wear resistance needs to be welded on the roller sleeve surface. In addition, during the long-term use of the roller sleeve, the surfacing layer will gradually be worn. When it is worn to a certain extent, it needs to be repaired by surfacing welding. During the repair process, special tooling is required for support, and special surfacing equipment is used to complete the repair work. Due to the large size and heavy weight of the roller sleeve, and the roller sleeve is a sleeve-shaped part, it is difficult to fix it with general tooling.

[0004] The quality of roller sleeve cladding depends on the concentricity of the roller sleeve and the rotation center of the cladding equipment. The cladding equipment needs to be centered with the help of special fixtures. There must be no installation errors or eccentric rotation caused by overweight roller sleeves. The ovality of the roller sleeve cladding is prevented from exceeding the standard, causing severe vibration of the equipment, and thus affecting the cladding quality. Traditional special fixtures have problems such as inaccurate manual center adjustment, difficult operation, time-consuming and labor-intensive, which seriously affect the cladding efficiency.

[0005] In addition, the existing roller sleeve surfacing tooling is individually made according to the inner diameter of each type of roller sleeve and cannot be adjusted, that is, each tooling can only install a fixed type of roller sleeve, and has poor versatility. When it is necessary to surfacing roller sleeves of different sizes, the corresponding tooling needs to be replaced, which increases the workload of the workers. Moreover, since there are many different types of roller sleeves produced, there are also many types of tooling that need to be made, which increases the cost of tooling production and also causes the tooling to occupy more space. Summary of the invention

[0006] The purpose of the present invention is to provide a positioning and clamping method for surfacing a vertical mill roller sleeve, which can quickly align and reliably position and clamp the roller sleeve. The method is simple and has good versatility. It can be applicable to surfacing roller sleeves of different sizes. It can be used on a "welding frame surfacing equipment" to perform offline surfacing on the roller sleeve.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] Positioning and clamping method for surfacing vertical mill roller sleeve,

[0009] The tooling used includes 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;

[0010] The spindle 3 comprises 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 sleeved on the spindle body 3.1, and is locked and fixed to the spindle body 3.1 by a top screw 3.5; bearings 3.4 are installed at both ends of the spindle body 3.1;

[0011] The lower adjustment device 4 comprises a support frame 4.1 and a telescopic mechanism 4.2; the support frame 4.1 comprises a support sleeve 4.3 and three sets of guide mechanisms 4.4; the support sleeve 4.3 is in axial sliding contact with the main shaft body 3.1 through a flat key and transmits torque in the circumferential direction; the guide mechanisms 4.4 are uniformly distributed on the support sleeve 4.3 in the circumferential direction with the support sleeve 4.3 as the center; each telescopic mechanism 4.2 is arranged on a guide mechanism 4.4 to drive a clamping head 4.15 to move radially in the support sleeve 4.3, and the clamping head 4.15 comprises a clamping position 41 and a supporting position 42, wherein the clamping position 41 is used to support the inner cavity 101 of the large end of the roller sleeve, and the supporting position 42 is used to support the lower end surface 102 of the large end of the roller sleeve 100; the upper part of the support seat 2 is connected to the lower adjustment device 4;

[0012] The upper adjusting device 5 is similar in structure to the lower adjusting device 4, but the supporting sleeve 4.3 in the upper adjusting device 5 is only in axial sliding contact with the main shaft body 3.1, the clamping position 51 in the upper adjusting device 5 is used to support the inner cavity 103 of the small end of the roller sleeve, and the supporting position 52 in the upper adjusting device 5 is used to support the upper end surface 104 of the small end of the roller sleeve 100;

[0013] The spindle body 3.1 is provided with an external thread that cooperates with the middle 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 spindle body 3.1 from bottom to top; the lower end surface of the support sleeve 4.3 in the lower adjustment device 4 contacts with the positioning sleeve 3.2 to achieve position limiting; the spacer sleeve 6 is sleeved on the spindle body 3.1 and is in sliding contact with the spindle body 3.1, and the two ends of the spacer sleeve 6 are respectively in contact with the support sleeve 5.3 and the middle ring 7.1 in the upper adjustment device 5.

[0014] The positioning and clamping method comprises the following steps:

[0015] 1) Lift the tooling assembled with the support base 2, the spindle 3, the lower adjustment device 4, the upper adjustment device 5, the spacer sleeve 6, and the handle 7, keep the spindle 3 vertical, and let the lower end of the spindle 3 pass through the center hole on the base 1 until the lower plane of the three sets of support bases 2 are in contact with the upper plane of the base 1;

[0016] 3) Keep the roller sleeve 100 in a horizontal state and hoist it steadily, insert it from the upper end of the main shaft 3 and put it on the tooling as a whole downward until the lower plane 102 of the roller sleeve's large end contacts the support position 42 of the clamping head 4.15, and adjust the telescopic mechanism 4.2 of the lower adjustment device 4 to extend the clamping head 4.15 until the three groups of clamping positions 41 of the clamping head 4.15 support the inner cavity 101 of the large end of the roller sleeve;

[0017] 4) Keep the upper adjustment device 5 in a horizontal state and hoist it steadily until the clamping head support position 52 contacts the upper plane 104 of the roller sleeve small end, and adjust the telescopic mechanism 5.2 of the upper adjustment device 5 to extend the clamping head 5.15 until the clamping positions 51 of the three groups of clamping heads 5.15 support the inner cavity 103 of the roller sleeve small end;

[0018] 6) Turn the handle 7 to tighten the thread while providing downward pressing force, and vertically clamp the two end surfaces of the roller sleeve 100 through the spacer sleeve 6 and the lower adjustment device 4 and the upper adjustment device 5 to tighten the roller sleeve so that the tooling and the roller sleeve form a combination.

[0019] The positioning and clamping method further includes a double-column welding frame 200; the columns at both ends of the welding frame 200 are arranged at a certain angle, and the inclination angle is the same as the taper of the roller sleeve, and a split bearing seat 201 is arranged at the upper end of the column; after step 6), the following steps are also included:

[0020] 7) The assembly is hoisted as a whole and turned over. After the whole is tilted at a certain angle until it is flush with the roller surface, the assembly is connected to the welding frame surfacing equipment 200, and the bearings 3.4 at both ends of the main shaft are stably installed in the bearing seat 201.

[0021] The positioning and clamping method further includes a scale for reflecting the distance that each clamp head 4.15 moves in the radial direction of the support sleeve 4.3 relative to the center of the support sleeve 4.3 driven by the telescopic mechanism 4.2, and after step 4), there are further steps:

[0022] 5) Adjust the telescopic mechanism 4.2 in the lower adjusting device 4 until the clamping position of the clamping head 4.15 presses against the inner cavity of the large end of the roller sleeve to perform "fine adjustment" of the center, keep the scale values ​​of the rulers used to reflect the moving distance of the clamping head 4.15 consistent and lock them;

[0023] Adjust the telescopic mechanism 5.2 in the upper adjusting device 5 until the clamping position of the clamping head 5.15 presses against the inner cavity of the small end of the roller sleeve to perform "fine adjustment" of the center, keep the scale values ​​of the scales reflecting the moving distance of the clamping head 5.15 consistent and lock it.

[0024] The above positioning and clamping method further includes the following steps before step 3): 2) measuring the inner diameters of the large and small ends of the roller sleeve 100, respectively adjusting the telescopic mechanism 4.2 of the lower adjusting device 4, and retracting the chuck 4.15 until the outer diameter of the supporting position 42 of the chuck 4.15 is larger than the inner diameter 101 of the large end of the roller sleeve, and the outer diameter of the clamping position 41 of the chuck 4.15 is smaller than the inner diameter 101 of the large end of the roller sleeve, and respectively adjusting the telescopic mechanism 5.2 of the upper adjusting device 5 to retract the chuck 5.15 until the outer diameter of the supporting position 52 of the chuck 5.15 is smaller than the inner diameter 103 of the small end of the roller sleeve, to ensure that the inner cavity of the roller sleeve can smoothly pass through the chuck.

[0025] The above-mentioned positioning and clamping method, the telescopic mechanism 4.2 includes a screw rod 4.12, a screw nut 4.13, a guide shaft 4.14, a clamp 4.15, a retaining ring 4.17, and a baffle 4.18; the screw nut 4.13 is threadedly connected to the screw rod 4.12, the screw nut 4.13 is installed on the guide mechanism 4.4, a square head is provided at the tail of the screw rod 4.12, and a shaft section is provided at the head of the screw rod 4.12 to pass through the baffle 4.18, and at the same time, the end of the screw rod 4.12 is fixed to the retaining ring 4.17; a groove is provided on the baffle 4.18 for installing the retaining ring 4.17 to achieve limiting, and is fixed to the 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 clamp 4.15.

[0026] In the above positioning and clamping method, 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 screw 4.12, one end of the scale 4.19 is fixed on the screw nut 4.13, and the partition 4.20 is fixed on the clamp 4.15. A groove is set on the partition 4.20 to slide in contact with the scale 4.19.

[0027] In the above-mentioned positioning and clamping method, an inclined stopper 4.16 is arranged on the chuck 4.15 in the lower adjusting device 4, and the outer side surface of the stopper 4.16 inclined with respect to the axis of the main shaft 3 serves as a clamping position 41 for supporting the inner cavity 101 of the large end of the roller sleeve; the clamping position 51 of the chuck 5.15 in the upper adjusting device 5 for supporting the inner cavity 103 of the small end of the roller sleeve is parallel to the axis of the main shaft 3.

[0028] In the above positioning and clamping method, 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 to one side of the screw nut 4.13 and is sleeved on the screw 4.12, and the shaft protective sleeve 4.22 is fixed to the guide sleeve 4.8 and is sleeved on the guide shaft 4.14.

[0029] In the above positioning and clamping method, the guide mechanism 4.4 comprises a sleeve 4.6, a fixing sleeve 4.7 and a guide sleeve 4.8. The fixing 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 fixing sleeve 4.7.

[0030] In the above positioning and clamping method, the coupling 3.3 is fixed to one end of the main shaft body 3.1 as the driving end, and the conductive device 202 is installed on the non-driving end of the main shaft body 3.1.

[0031] In the above positioning and clamping method, two lifting ears 6.1 arranged at 180 degrees are welded on the outer side of the spacer sleeve 6 to facilitate lifting.

[0032] The beneficial effects of the present invention are:

[0033] This positioning and clamping method can quickly align and position the roller sleeve and is easy to operate. Each connection link of the self-positioning surfacing tooling adopts a detachable structure, which is convenient for on-site installation and adjustment, and the tooling fixture is equipped with 2 sets of adjustment devices. Only the screw rod needs to be turned to adjust the telescopic length of the fixture to meet the requirements of different types of roller sleeve surfacing clamping. The operation is simple and the applicability and versatility are strong. The telescopic length of the fixture can be synchronized by unifying the scale values ​​of each ruler, which is convenient for observation and high in precision of adjusting the center, so as to achieve the purpose of adjusting the concentricity of the tooling and the two ends of the roller sleeve, and ensure that the roller sleeve is coaxial with the center of the surfacing tooling. It is easy to install and improves installation efficiency. Only one set of tooling is needed to meet the surfacing requirements of most types of vertical mill roller sleeves, saving production costs, and the tooling does not occupy space. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is the structural diagram of the "vertical installation" of the self-positioning welding fixture

[0035] Figure 2 This is the structural diagram of the "tilted installation" of the cladding self-positioning tooling

[0036] Figure 3 This is the main view of the "vertical installation" structure of the cladding self-positioning tooling

[0037] Figure 4 This is the top view of the "vertical installation" structure of the cladding self-positioning tooling

[0038] Figure 5 This is a schematic diagram of the lower adjustment device structure

[0039] Figure 6 This is a schematic diagram of the upper adjustment device structure DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings:

[0041] like Figure 1 , Figure 2 As shown, a novel adjustable vertical mill roller sleeve offline surfacing self-positioning tooling 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, a handle 7, etc.

[0042] 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 and the roller sleeve 100 are vertically mounted. The upper part of the support seat 2 is connected by bolts to connect the lower adjustment device 4. The spindle 3 is used for auxiliary transmission and has good strength and rigidity to stably support the roller sleeve 100. The driving end of the spindle 3 is connected to the output shaft of the reduction 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 of the tooling, arranged at intervals and mounted on the spindle 3. The two sets of adjustment devices clamp the two ends of the roller sleeve 100 respectively, and are used to adjust the center of the upper and lower ends of the roller sleeve to ensure that the roller sleeve is coaxial with the center of the surfacing tooling. The outer surface of the vertical mill roller sleeve 100 is a conical surface, and the inner and outer surfaces are processed by machine tools to ensure the concentricity of the body. When the tooling is installed, the lower adjusting device 4 is used to support the inner cavity 101 and the end face 102 of the large end of the roller sleeve, and the upper adjusting device 5 is used to support the inner cavity 102 and the end face 103 of the small end of the roller sleeve. When the inner cavities at 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 surfacing tooling.

[0043] 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 from each other. The top plate (small diameter circular plate) 1.2 faces upward and comprises a central circular hole for fixing the support seat 2. The large diameter circular plate 1.1 faces downward and is thickened for being firmly fixed to the ground foundation. The middle column 1.3 is supported by H-steel. Three groups are arranged in a 120° circumferential arrangement with the circular plate as the center, and the structural strength is ensured by integral welding.

[0044] The main shaft 3 includes a main shaft body 3.1, a positioning sleeve 3.2, a coupling 3.3, a bearing 3.4, etc. The main shaft body 3.1 is made of 40Cr thick-walled steel pipe and is quenched and tempered. It is used for auxiliary transmission and has good strength and rigidity to stably support the roller sleeve 100. The head of the coupling 3.3 is provided with a boss that is tightly matched with the inner hole of the main shaft body 3.1. The driving end of the main shaft body 3.1 is installed with the coupling 3.3 by means of concave-convex plug-in fitting positioning and bolt connection. The tail of the coupling is provided with a keyway that is tightly plugged and fixed with the output shaft of the reduction motor 203. The non-driving end shaft section of the main shaft body 3.1 is provided with a keyway that matches the inner cavity of the support sleeve 4.3 of the lower adjustment device 4. The main shaft 3 is tightly connected with the lower adjustment device 4 by installing a flat key to achieve torque transmission. The inner cavity of the positioning sleeve 3.2 is in sliding contact with the main shaft body 3.1. The positioning sleeve 3.2 is sleeved on the non-driving end shoulder of the main shaft body 3.1 and is locked and fixed to the main shaft body 3.1 by the top screw 3.5 (the positioning sleeve 3.2 can be removed by loosening the top screw 3.5).

[0045] The main shaft body 3.1 and the handle intermediate ring 7.1 are connected by threads, and the main shaft body 3.1 is provided with 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 main shaft body 3.1. Two lifting ears 6.1 arranged at 180 degrees are welded on the outside of the spacer sleeve 6 for easy lifting. The spacer sleeve 6 is mounted on the main shaft body 3.1 to isolate the handle 7 from direct contact with the upper adjustment device 5. The handle rod 7.2 is turned to provide a clamping force by tightening the threads. The two end faces of the roller sleeve 100 are clamped by the upper and lower adjustment devices, respectively, which can effectively tighten the roller sleeve, so that the tooling and the roller sleeve are combined into a whole, and are easy to disassemble. The conductive device 202 is installed on the non-driving end of the main shaft body 3.1 to meet the welding safety requirements. Bearings 3.4 are installed on the shoulders at both ends of the main shaft body 3.1. They adopt spherical roller bearings and are respectively installed in the bearing seats 201 at both ends of the double-column welding frame 200. The split bearing seats are adopted to facilitate the overall disassembly and assembly of the tooling spindle. The bearing seats 201 are respectively 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 inclination angle is the same as the taper of the roller sleeve.

[0046] like Figure 4 , Figure 5 As shown, the lower adjustment device 4 comprises a support frame 4.1 and a telescopic mechanism 4.2.

[0047] The support frame 4.1 includes a support sleeve 4.3 and three guide mechanisms 4.4. The inner cavity of the support sleeve 4.3 is in sliding contact with the main shaft body 3.1. The support sleeve 4.3 is sleeved on the main shaft body 3.1 and is limited by the positioning sleeve 3.2 set on the main shaft body 3.1. The inner cavity of the support sleeve 4.3 is provided with a keyway that matches the shaft section of the main shaft body 3.1. By installing a flat key 4.5, it is tightly connected to achieve torque transmission. The guide mechanism 4.4 is arranged 120° circumferentially with the support sleeve 4.3 as the center and is fixed by welding. The guide mechanism 4.4 includes a sleeve 4.6, a fixed sleeve 4.7, a guide sleeve 4.8, etc. 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 sleeved in the inner cavity of the fixed sleeve 4.7 by bolt connection.

[0048] The side of the sleeve 4.6 is provided with a lifting lug 4.9, a support plate 4.10 and a fixing plate 4.11 and fixed by welding. The lifting lug 4.9 is used for lifting the tooling, and two groups of the support plate 4.10 are fixed on the two sides of the sleeve 4.6. The support plate 4.10 is provided with a limit and a screw hole for connecting with the support seat 2, and the fixing plate 4.11 is provided with a limit and a screw hole for connecting with the screw nut 4.13.

[0049] The telescopic mechanism 4.2 is provided with three sets arranged in a circumferential direction of 120° and is sleeved in the guide sleeve 4.8 of the guide mechanism 4.4. The telescopic mechanism 4.2 includes a screw 4.12, a screw nut 4.13, a guide shaft 4.14, a chuck 4.15, a 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, a shaft protective sleeve 4.22, etc.

[0050] The screw nut 4.13 is threadedly connected with the screw 4.12. The screw 4.12 adopts a trapezoidal thread. The screw 4.12 is sleeved in the screw nut 4.13. The threaded protective sleeve 4.21 is fixed on one side of the screw nut 4.13 and sleeved on the screw 4.12 to block the splash generated during surfacing. The screw nut 4.13 is installed on the sleeve fixing plate 4.11 by bolt connection. The tail of the screw 4.12 is provided with a square head for operating a wrench. The head of the screw 4.12 is provided with a shaft section passing through the baffle 4.18. At the same time, the end of the screw 4.12 is provided with a shoulder and a screw hole to be fixed with the retaining ring 4.17 by bolt connection. The baffle 4.18 is provided with a groove for installing the retaining ring 4.17 to achieve limiting, and is fixed with the clamp 4.15 by bolt connection. The guide shaft 4.14 is in sliding contact with the inner wall of the guide sleeve 4.8, and the guide shaft 4.14 is sleeved in the guide sleeve 4.8. The shaft protection sleeve 4.22 is fixed on the guide sleeve 4.8 and sleeved on the guide shaft 4.14 to block the splash generated during surfacing. A boss and a screw hole matching the keyway of the chuck 4.15 are set at one end of the guide shaft 4.14, and the chuck 4.15 is fixed by bolt connection. A slope matching the conical surface of the inner cavity 101 of the big end of the roller sleeve is set on one side of the stopper 4.16, and the chuck 4.15 is fixed by bolt connection, which is convenient for disassembly and replacement. The ruler 4.19 is installed on the periphery of the screw rod 4.12, and the fixed end of the ruler 4.19 is fixed to the screw nut 4.13 by bolt connection. The movable end of the ruler 4.19 passes through the partition 4.20, and the partition 4.20 is fixed to the chuck 4.15 by bolt connection. The partition 4.20 is provided with a groove for telescopic guidance of the ruler 4.19, and the groove of the partition 4.20 is in sliding contact with the ruler 4.19. Three sets of scales 4.19 are respectively arranged on three sets of telescopic mechanisms 4.2 arranged circumferentially at 120°. When in use, the screw rod 4.12 is rotated with a wrench, limited by the screw nut 4.13, and the guide shaft 4.14 is used as a guide in the guide sleeve 4.8, thereby driving the clamping head 4.15 to achieve telescopic. The clamping head 4.15 includes a clamping position (outside the stopper 4.16) 41 and a supporting position 42, wherein the clamping position 41 is used to support the inner cavity 101 of the large end of the roller sleeve, and the supporting position 42 is used to clamp the large end plane 102 of the roller sleeve. The three sets of clamping heads 4.15 support the inner cavity 101 and the end surface 102 of the large end of the roller sleeve circumferentially at 120°. The telescopic length of the clamping head 4.15 can be synchronized by unifying the scale value of the scale 4.19, so as to achieve the purpose of adjusting the concentricity of the tooling and the large end of the roller sleeve.

[0051] like Figure 4 , Figure 6 As shown, the upper adjustment device 5 comprises a support frame 5.1 and a telescopic mechanism 5.2.

[0052] The support frame 5.1 includes a support sleeve 5.3 and three guide mechanisms 5.4. The inner cavity of the support sleeve 5.3 is in sliding contact with the main shaft body 3.1, and the support sleeve 5.3 is sleeved on the main shaft body 3.1. The guide mechanism 5.4 is arranged 120° circumferentially with the support sleeve 5.3 as the center and is fixed by welding. The guide mechanism 5.4 includes a sleeve 5.6, a fixed sleeve 5.7, a guide sleeve 5.8 and the like. 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 sleeved in the inner cavity of the fixed sleeve 5.7 by bolt connection. A lifting ear 5.9 and a fixing plate 5.11 are provided on the side of the sleeve 5.6 and fixed by welding. The lifting ear 5.9 is used for lifting the tooling, and the fixing plate 5.11 is provided with a limit and a screw hole for connecting with the screw nut 5.13.

[0053] The telescopic mechanism 5.2 is provided with three sets arranged in a 120° circumferential direction and is sleeved in the guide sleeve 5.8 of the guide mechanism 5.4. The telescopic mechanism 5.2 comprises a screw rod 5.12, a screw rod nut 5.13, a guide shaft 5.14, a 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, a shaft protective sleeve 5.22, etc. The screw rod nut 5.13 is threadedly connected with the screw rod 5.12, the screw rod 5.12 adopts a trapezoidal thread, the screw rod 5.12 is sleeved in the screw rod nut 5.13, the threaded protective sleeve 5.21 is fixed on one side of the screw rod nut 5.13 and sleeved on the screw rod 5.12 to block the splash generated during surfacing welding, and the screw rod nut 5.13 is installed on the sleeve fixing plate 5.11 by bolt connection. A square head is provided at the tail of the screw rod 5.12 for operating a wrench, and a shaft section is provided at the head of the screw rod 5.12 to pass through the baffle plate 5.18. At the same time, a shaft shoulder and a screw hole are provided at the end of the screw rod 5.12 to be fixed with the retaining ring 5.17 by bolt connection. A groove is provided on the baffle plate 5.18 for installing the retaining ring 5.17 to achieve position limiting, and is fixed with the clamp head 5.15 by bolt connection. The guide shaft 5.14 is in sliding contact with the inner wall of the guide sleeve 5.8, and the guide shaft 5.14 is sleeved in the guide sleeve 5.8. The shaft protection sleeve 5.22 is fixed on the guide sleeve 5.8 and sleeved on the guide shaft 5.14 to block the splash generated during surfacing. A boss and a screw hole that match the keyway of the clamp head 5.15 are provided at one end of the guide shaft 5.14, and are fixed with the clamp head 5.15 by bolt connection. The ruler 5.19 is installed on the periphery of the screw rod 5.12, and the fixed end of the ruler 5.19 is fixed on the screw rod nut 5.13 by bolt connection. The movable end of the scale 5.19 passes through the partition 5.20, which is fixed to the clamp 5.15 by bolt connection. The partition 5.20 is provided with a groove for the expansion and contraction guide of the scale 5.19, and the groove of the partition 5.20 is in sliding contact with the scale 5.19. The three sets of scales 5.19 are respectively arranged on three sets of telescopic mechanisms 5.2 arranged 120° circumferentially. When in use, the screw 5.12 is rotated by a wrench, limited by the screw nut 5.13, and the guide shaft 5.14 is used as a guide in the guide sleeve 5.8, thereby driving the clamp 5.15 to achieve expansion and contraction. The clamping head 5.13 includes a clamping position 51 and a supporting position 52, wherein the clamping position 51 is used to support the inner cavity 102 of the small end of the roller sleeve, and the supporting position is used to clamp the flat surface 103 of the small end of the roller sleeve. The three sets of clamping heads 5.15 support the inner cavity 102 and the end surface 103 of the small end of the roller sleeve in a 120° circumferential direction. The telescopic length of the clamping head 5.15 can be synchronized by unifying the scale value of the ruler 5.19, so as to achieve the purpose of adjusting the tooling and the small end of the roller sleeve to be concentric.

[0054] Using the above-mentioned adjustable vertical mill roller sleeve offline surfacing self-positioning tooling, when surfacing the vertical mill roller sleeve, the positioning and clamping method of the roller sleeve includes the following steps:

[0055] 1) Use the lifting lug 4.9 on the lower adjustment device 4 to keep the surfacing welding fixture in a horizontal state and lift it steadily until the non-driving end of the main shaft 3 passes through the center hole of the top plate 1.2 of the base 1, and 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, until the lower plane of the three groups of support seats 2 is in contact with the upper plane of the top plate 1.2 of the base 1;

[0056] 2) Use a tape measure to measure the inner diameters of the large and small ends of the roller sleeve 100, and rotate the three sets of screw rods 4.12 of the lower adjustment device 4 to extend the chuck 4.15 until the outer diameter of the clamping position 41 of the chuck 4.15 is smaller than the inner diameter 101 of the large end of the roller sleeve, and rotate the three sets of screw rods 5.12 of the upper adjustment device 5 to retract the chuck 5.15 until the outer diameter of the supporting position 52 of the chuck 5.15 is smaller than the inner diameter 103 of the small end of the roller sleeve, to ensure that the inner cavity of the roller sleeve can smoothly pass through the chuck;

[0057] 3) Use the sling to keep the roller sleeve 100 in a horizontal state and lift it steadily, insert it from the top of the driving end of the main shaft 3 and put it on the tooling as a whole, use a tape measure to measure the distance between the tooling and the main shaft at multiple points to "roughly adjust" the center until the lower plane 102 of the roller sleeve big end contacts the support position 42 of the clamp 4.15, and rotate the three sets of screw rods 4.12 of the lower adjustment device respectively to extend the clamp 4.15 until the three sets of clamp block 4.16 inclined surface circumferential clamping positions support the inner cavity 101 of the roller sleeve big end;

[0058] 4) Use the lifting lug 5.9 on the upper adjusting device 5 to keep it in a horizontal state and lift it steadily until the clamping head support position 52 contacts the upper plane 104 of the roller sleeve small end, and rotate the three sets of screw rods 5.12 of the upper adjusting device to extend the clamping head 5.15 until the three sets of clamping heads 5.15 circumferentially clamp at the inner cavity 103 of the roller sleeve small end;

[0059] 5) Rotate the screws on the upper and lower adjustment devices respectively until the clamping position of the chuck presses against the inner cavities at both ends of the roller sleeve to perform "fine adjustment" of the center, keep the scale values ​​of each ruler consistent and lock them;

[0060] 6) Turn the handle 7 to tighten the thread and provide downward pressing force at the same time. Through the spacer sleeve 6 and the upper and lower two sets of adjustment devices, the two end surfaces of the roller sleeve 100 are vertically clamped, which can effectively tighten the roller sleeve and combine the tooling and the roller sleeve into a whole.

[0061] 7) The whole lifting tool and roller sleeve assembly are turned over, and after the whole is tilted at a certain angle until it is flush with the roller surface, the assembly is connected to the welding frame surfacing equipment 200, and the bearings 3.4 at both ends of the main shaft are stably installed in the bearing seat 201;

[0062] The beneficial effects of the present invention are:

[0063] Each connecting link of the self-positioning surfacing tooling adopts a detachable structure, which is convenient for on-site installation and adjustment, and the tooling fixture is equipped with two sets of adjustment devices. The telescopic length of the fixture can be adjusted by rotating the screw rod to meet the requirements of different types of roller sleeve surfacing clamping. The operation is simple and the applicability and versatility are strong. The telescopic length of the fixture can be synchronized by unifying the scale values ​​of each ruler, which is convenient for observation and has high accuracy in adjusting the center, so as to achieve the purpose of adjusting the concentricity of the tooling and the two ends of the roller sleeve, and ensure that the roller sleeve is coaxial with the center of the surfacing tooling. The installation is convenient and the installation efficiency is improved. Only one set of tooling is needed to meet the surfacing requirements of most types of vertical mill roller sleeves, thus saving production costs and the tooling does not occupy space.

[0064] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. The positioning and clamping method for surfacing the roller sleeve of the vertical mill is characterized by: The tooling used comprises 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); The main shaft (3) comprises a main shaft body (3.1) and a positioning sleeve (3.2); the inner cavity of the positioning sleeve (3.2) is in sliding contact with the main shaft body (3.1); the positioning sleeve (3.2) is sleeved on the main shaft body (3.1) and is locked and fixed to the main shaft body (3.1) by means of a top screw (3.5); bearings (3.4) are installed at both ends of the main shaft body (3.1); The lower adjustment device (4) comprises a support frame (4.1) and a telescopic mechanism (4.2); the support frame (4.1) comprises a support sleeve (4.3) and three sets of guide mechanisms (4.4); the support sleeve (4.3) is in axial sliding contact with the main shaft body (3.1) through a flat key and transmits torque in the circumferential direction; the guide mechanisms (4.4) are uniformly distributed on the support sleeve (4.3) in the circumferential direction with the support sleeve (4.3) as the center; each telescopic mechanism (4.2) is arranged on a guide mechanism (4.4) to drive a clamping head (4.15) to move radially on the support sleeve (4.3), and the clamping head (4.15) comprises a clamping position (41) and a supporting position (42), wherein the clamping position (41) is used to support the inner cavity (101) of the large end of the roller sleeve, and the supporting position (42) is used to support the lower end surface (102) of the large end of the roller sleeve (100); the upper part of the support seat (2) is connected to the lower adjustment device (4); The upper adjustment device (5) is similar in structure to the lower adjustment device (4), but the support sleeve (4.3) in the upper adjustment device (5) is only in axial sliding contact with the main shaft body (3.1), the clamping position 51 in the upper adjustment device (5) is used to support the inner cavity (103) of the small end of the roller sleeve, and the support position (52) in the upper adjustment device (5) is used to support the upper end surface (104) of the small end of the roller sleeve (100); The main shaft body (3.1) is provided with an external thread that matches with the middle ring (7.1) of the handle (7); the positioning sleeve (3.2), the lower adjustment device (4), the upper adjustment device (5), the spacing sleeve (6), and the handle (7) are arranged on the main shaft body (3.1) from bottom to top; the lower end surface of the support sleeve (4.3) in the lower adjustment device (4) contacts with the positioning sleeve (3.2) to achieve position limiting; the spacing sleeve (6) is sleeved on the main shaft body (3.1) and is in sliding contact with the main shaft body (3.1), and the two ends of the spacing sleeve (6) are respectively in contact with the support sleeve 5.3 and the middle ring (7.1) in the upper adjustment device (5). The positioning and clamping method comprises the following steps: 1) Lift the tooling assembled with the support base (2), the main shaft (3), the lower adjustment device (4), the upper adjustment device (5), the spacer sleeve (6), and the handle (7), keep the main shaft (3) vertical, and let the lower end of the main shaft (3) pass through the center hole on the base 1 until the lower planes of the three groups of support bases (2) are in contact with the upper plane of the base 1; 3) Keep the roller sleeve (100) in a horizontal state and hoist it steadily, insert it from the upper end of the main shaft (3) and put it on the tooling as a whole downward until the lower plane (102) of the large end of the roller sleeve contacts the support position (42), and adjust the telescopic mechanism (4.2) of the lower adjustment device (4) to extend the clamping head (4.15) until the clamping positions (41) of the three groups of clamping heads (4.15) support the inner cavity (101) of the large end of the roller sleeve; 4) Keep the upper adjustment device (5) in a horizontal state and hoist it steadily until the clamping head support position (52) contacts the upper plane (104) of the small end of the roller sleeve, and adjust the telescopic mechanism (5.2) of the upper adjustment device (5) to extend the clamping head (5.15) until the clamping positions 51 of the three groups of clamping heads (5.15) press against the inner cavity (103) of the small end of the roller sleeve; 6) Turn the handle (7) to tighten the thread while providing downward pressing force, and vertically clamp the two end surfaces of the roller sleeve (100) through the spacer sleeve (6) and the lower adjustment device (4) and the upper adjustment device (5) to tighten the roller sleeve, so that the tooling and the roller sleeve form a combined body.

2. The positioning and clamping method according to claim 1, characterized in that: It also includes a double-column welding frame (200); the columns at both ends of the welding frame (200) are arranged at a certain angle, and the inclination angle is the same as the taper of the roller sleeve, and a split bearing seat (201) is arranged at the upper end of the column; after step 6), it also includes the following steps: 7) The assembly is hoisted as a whole and turned over. After the assembly is tilted at a certain angle until it is flush with the roller surface, the assembly is connected to the welding frame surfacing equipment (200) and the bearings (3.4) at both ends of the main shaft are stably installed in the bearing seat (201).

3. The positioning and clamping method according to claim 1, characterized in that: It also includes a scale for reflecting the distance that each clamp head (4.15) moves in the radial direction of the support sleeve (4.3) relative to the center of the support sleeve (4.3) under the drive of the telescopic mechanism (4.2), and after step 4), there is also a step of: 5) Adjust the telescopic mechanism (4.2) in the lower adjustment device (4) until the clamping position of the clamping head (4.15) presses against the inner cavity of the large end of the roller sleeve to perform "fine adjustment" of the center, keep the scale values ​​of the scales used to reflect the moving distance of the clamping head (4.15) consistent and lock them; The telescopic mechanism (5.2) in the upper adjusting device (5) is adjusted until the clamping position of the clamping head (5.15) presses against the inner cavity of the small end of the roller sleeve to perform "fine adjustment" of the center, and the scale values ​​of the scales used to reflect the moving distance of the clamping head (5.15) are kept consistent and locked.

4. The positioning and clamping method according to claim 1, characterized in that: The telescopic mechanism (4.2) comprises a screw rod (4.12), a screw rod nut (4.13), a guide shaft (4.14), a clamp (4.15), a retaining ring (4.17), and a baffle (4.18); the screw rod nut (4.13) is threadedly connected to the screw rod (4.12), the screw rod nut (4.13) is installed on the guide mechanism (4.4), a square head is arranged at the tail of the screw rod (4.12), a shaft section is arranged at the head of the screw rod (4.12) and passes through the baffle (4.18), and the end of the screw rod (4.12) is fixed to the retaining ring (4.17); a groove is arranged on the baffle (4.18) for installing the retaining ring (4.17) to achieve position limiting, and the baffle (4.18) is fixed to the 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 clamp (4.15).

5. The positioning and clamping method according to claim 4, characterized in that: The telescopic mechanism (4.2) further comprises a scale (4.19) and a partition (4.20); the scale (4.19) is installed on the periphery of the screw rod (4.12), one end of the scale (4.19) is fixed on the screw rod nut (4.13), the partition (4.20) is fixed on the clamp (4.15), and a groove is arranged on the partition (4.20) to be in sliding contact with the scale (4.19).

6. The positioning and clamping method according to claim 4, characterized in that: An inclined stopper (4.16) is arranged on the clamping head (4.15) in the lower adjusting device (4); an outer side surface of the stopper (4.16) inclined with respect to the axis of the main shaft (3) serves as a clamping position (41) for supporting the inner cavity (101) of the large end of the roller sleeve; and a clamping position 51 of the clamping head (5.15) in the upper adjusting device (5) for supporting the inner cavity (103) of the small end of the roller sleeve is parallel to the axis of the main shaft (3).

7. The positioning and clamping method according to claim 4, characterized in that: The telescopic mechanism (4.2) further comprises a thread protection sleeve (4.21) and a shaft protection sleeve (4.22); The thread protection sleeve (4.21) is fixed on one side of the screw nut (4.13) and is sleeved on the screw (4.12); the shaft protection sleeve (4.22) is fixed on the guide sleeve (4.8) and is sleeved on the guide shaft (4.14).

8. The positioning and clamping method according to claim 1, characterized in that: The guide mechanism (4.4) comprises 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).

9. The positioning and clamping method according to claim 1, characterized in that: The main shaft body (3.1) is fixed with a coupling (3.3) at one end serving as a driving end, and a conductive device (202) is installed at the non-driving end of the main shaft body (3.1).

10. The positioning and clamping method according to claim 1, characterized in that: Two lifting ears (6.1) arranged at 180 degrees are welded on the outside of the spacer sleeve (6) to facilitate lifting.

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