Assembling method and assembling tool for supporting roller

Abstract

The invention provides an assembling method and an assembling tool of a supporting roller, and relates to the technical field of shaft accessory assembling, the assembling method of the supporting roller is suitable for the assembling tool, the assembling tool comprises a base, a positioning structure and a plurality of lifting lugs, the positioning structure is arranged on the base, and the lifting lugs are arranged on the positioning structure. The plurality of lifting lugs are arranged on the base around the positioning structure, and the supporting roll comprises a roll sleeve and a mandrel; the assembling method of the supporting roller comprises the following steps that the roller sleeve is installed on the positioning structure, and the roller sleeve and the assembling tool are heated to the preset temperature through a heating device; lifting hooks of first lifting equipment are connected with the lifting lugs, and the assembly tool and the roller sleeve are lifted to an assembly position; the mandrel is hoisted through second hoisting equipment, and the posture of the mandrel is adjusted; and the core shaft is assembled in the roller sleeve. According to the invention, the stable hoisting of the roller sleeve and the accurate assembly operation of the roller sleeve and the mandrel can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of shaft accessory assembly, and in particular to an assembly method and assembly tooling for a support roller. Background Art

[0002] Steel rolling equipment, such as rolling mills, is a mechanical device that realizes the metal rolling process. The key core parts of rolling mills, the support rollers, are usually integrally forged high-strength alloy support rollers. During the rolling process, due to the complex working conditions, the working layer strength of the support rollers is required to be high. However, in order to meet the different performance requirements of the rolling mill roll body and roll neck, and to be able to control the shape of the support rollers during the rolling process, a mandrel and roll sleeve assembly support roller was designed and developed to replace the traditional full-section alloy support roller.

[0003] Among them, since the roller sleeve of the supporting roller is very large, for example, its length is as high as more than 1600mm, the outer diameter reaches 1400mm, the wall thickness reaches 230mm, the weight is correspondingly close to 11 tons, and the circumferential outer wall of the roller sleeve is a smooth side, the roller sleeve with excessive volume and weight is difficult to be lifted steadily during the lifting process and to be accurately assembled with the core shaft. Summary of the invention

[0004] The problem solved by the invention is how to ensure the smooth lifting of the roller sleeve and the accurate assembly of the roller sleeve and the core shaft.

[0005] In order to solve the above problems, the present invention provides an assembly method and assembly tool for a support roller.

[0006] In a first aspect, the present invention provides a method for assembling a support roller, comprising an assembly tool, wherein the assembly tool comprises a base, a positioning structure and a plurality of lifting ears, wherein the positioning structure is arranged on the base, and a plurality of lifting ears are arranged on the base around the positioning structure, and the support roller comprises a roller sleeve and a core shaft; the method for assembling the support roller comprises the following steps:

[0007] Installing the roller sleeve on the positioning structure, and heating the roller sleeve and the assembly tool to a preset temperature by a heating device;

[0008] The assembly tool and the roller sleeve are hoisted to the assembly position by connecting the hook of the first hoisting equipment with the hoisting lug;

[0009] Lifting the mandrel by a second lifting device and adjusting the posture of the mandrel;

[0010] The mandrel is assembled in the roller sleeve.

[0011] Optionally, before taking out the roller sleeve and the assembly tool from the heating device, the method further includes taking out the roller sleeve and the assembly tool from the heating device, measuring the thermal expansion of the roller sleeve, and determining the assembly gap between the roller sleeve and the mandrel;

[0012] The measuring of the thermal expansion of the roller sleeve comprises:

[0013] Measuring a first inner diameter value of the roller sleeve before heating by a first measuring instrument;

[0014] Measuring a second inner diameter value of the roller sleeve after heating by a second measuring instrument;

[0015] The thermal expansion of the roller sleeve is obtained according to the first inner diameter value and the second inner diameter value of the roller sleeve.

[0016] Optionally, determining the assembly gap between the roller sleeve and the mandrel includes:

[0017] Measuring the outer diameter of the mandrel;

[0018] According to the second inner diameter value of the roller sleeve and the outer diameter value of the mandrel, an assembly gap between the roller sleeve and the mandrel is obtained.

[0019] Optionally, the connecting the hook of the first lifting device with the lifting ear to lift the assembly tool and the roller sleeve to the assembly position includes:

[0020] Connecting the hook of the first lifting device to the heated lifting lug;

[0021] Hoisting the assembly tool and the roller sleeve and transferring them to the assembly position by means of the first hoisting equipment;

[0022] The roller sleeve is adjusted in posture so that the axis of the roller sleeve is perpendicular to the ground.

[0023] Optionally, lifting the mandrel by a second lifting device and adjusting the posture of the mandrel includes:

[0024] Fixing the clamp of the second lifting device to the mandrel;

[0025] Lifting the mandrel by means of the second lifting device;

[0026] The core shaft is adjusted in posture so that the axis of the core shaft is perpendicular to the ground.

[0027] Optionally, assembling the mandrel in the roller sleeve comprises:

[0028] The mandrel is moved to the assembly position by the second lifting device, and the mandrel is placed above the roller sleeve;

[0029] The mandrel is dropped into the roller sleeve.

[0030] Optionally, assembling the mandrel in the roller sleeve further comprises:

[0031] Before the mandrel is dropped into the roller sleeve, the gap between the outer wall of the mandrel and the inner wall of the roller sleeve is measured and adjusted until the circumferential gap between the mandrel and the roller sleeve is uniform.

[0032] In a second aspect, the present invention provides an assembly tool for a support roller, which is used to implement the assembly method of the support roller as described above, wherein the assembly tool for the support roller comprises a base, a positioning structure and a plurality of lifting ears, wherein the positioning structure is arranged on the base, and the plurality of lifting ears are arranged on the base around the positioning structure.

[0033] Optionally, the positioning structure comprises a plurality of positioning blocks, wherein the plurality of positioning blocks are arranged on the base in a ring-shaped manner and at intervals, and an arc groove is provided on the end surface of the positioning block away from the base, and the roller sleeve of the supporting roller is placed in the arc groove corresponding to the plurality of positioning blocks.

[0034] Optionally, the base is provided with a through hole for the core shaft of the supporting roller to pass through; the positioning block has a positioning protrusion on the inner edge of the arc groove, and the positioning protrusions of multiple positioning blocks together constitute a positioning support part, the core shaft includes multiple structural segments connected in sequence and with different diameters, the inner diameter of the positioning support part is smaller than the part of the structural segment of the core shaft, and the positioning support part is used to support the core shaft of the supporting roller.

[0035] The beneficial effects of the assembly method and assembly tool of the support roller of the present invention are:

[0036] The roller sleeve and the core shaft of the supporting roller can be assembled according to the following steps: for example, the roller sleeve is installed on the positioning structure of the assembly tool to limit and fix the roller sleeve by the positioning structure, and the roller sleeve and the assembly tool can be placed together in a heating device to heat the roller sleeve and the assembly tool to a preset temperature by the heating device, so that the roller sleeve expands to a certain extent under the high-temperature heating action of the heating device, which is helpful for the subsequent assembly of the roller sleeve and the core shaft; the roller sleeve and the assembly tool are taken out of the heating device, and then the hook of the first lifting device is connected to the lifting ear of the assembly tool, and then the assembly tool and the roller sleeve are lifted to the assembly position by the first lifting device; the core shaft is lifted by the second lifting device, and the posture of the core shaft is adjusted so that the axis of the core shaft is perpendicular to the ground, and finally the core shaft is embedded in the roller sleeve at the assembly position to assemble the supporting roller.

[0037] In other words, during the assembly process of the roller sleeve and the mandrel of the support roller, the roller sleeve is supported and fixed by the assembly tool, and the base of the assembly tool has a lifting lug connected to the first lifting device, so that the first lifting device cooperates with the lifting lug of the assembly tool to achieve a smooth lifting operation of the roller sleeve with a smooth circumferential outer wall. Furthermore, by adjusting the posture of the mandrel, the accurate assembly operation of the roller sleeve and the mandrel can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The figure is a schematic flow chart of the method for assembling the support roller in the embodiment of the present invention.

[0039] Figure 2 It is a schematic diagram of the structure of the assembly tool in an embodiment of the present invention.

[0040] Figure 3 It is a schematic diagram of the installation structure of the assembly tool and the roller sleeve in an embodiment of the present invention.

[0041] Figure 4 Schematic diagram of the structure of the second measuring instrument in an embodiment of the present invention.

[0042] Figure 5 It is a structural schematic diagram of the posture adjustment of the roller sleeve on the assembly tool in an embodiment of the present invention.

[0043] Figure 6 It is a schematic structural diagram of the roller sleeve and the mandrel being assembled on the assembly tool in an embodiment of the present invention.

[0044] Figure 7 Schematic diagram of the structure of the mandrel in an embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 1-assembly tool; 11-base; 111-through hole; 12-positioning structure; 121-positioning block; 1210-arc groove; 1211-positioning protrusion; 13-lifting ear; 2-adjustable pad; 31-roller sleeve; 32-core shaft; 321-structural section; 4-support surface; 5-second measuring instrument; 51-handle; 52-measuring rod. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0048] The Z axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the X axis in the drawings represents the horizontal direction, and is designated as the left and right position, and the positive direction of the X axis represents the right side, and the reverse direction of the X axis represents the left side. It should also be noted that the aforementioned Z axis and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0049] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0050] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0051] In view of the problems existing in the above-mentioned related technologies, this embodiment provides an assembly method and assembly tool for a support roller.

[0052] like Figure 2 As shown, an assembly method of a support roller provided by an embodiment of the present invention is applicable to an assembly tool 1, wherein the assembly tool 1 comprises a base 11, a positioning structure 12 and a plurality of lifting ears 13, wherein the positioning structure 12 is arranged on the base 11, and the plurality of lifting ears 13 are arranged on the base 11 around the positioning structure 12, and the support roller comprises a roller sleeve 31 and a core shaft 32; Figure 1 As shown, the assembly method of the support roller comprises the following steps:

[0053] S1, installing the roller sleeve 31 on the positioning structure 12, and heating the roller sleeve 31 and the assembly tool 1 to a preset temperature by a heating device;

[0054] S2, taking out the roller sleeve 31 and the assembly tool 1 from the heating device, connecting them with the lifting lug 13 through the hook of the first lifting device, and lifting the assembly tool 1 and the roller sleeve 31 to the assembly position;

[0055] S3, lifting the mandrel 32 by a second lifting device, and adjusting the posture of the mandrel 32;

[0056] S4, assembling the core shaft 32 into the roller sleeve 31.

[0057] Specifically, combined Figure 2 As shown, the base 11 can be a rectangular parallelepiped structure, a cylindrical structure or a truncated cone structure, which is not specifically limited here. A positioning structure 12 can be set on the upper end surface of the bottom end, and the roller sleeve 31 can be installed on the positioning structure 12, so that the roller sleeve 31 can be limited and fixed by the positioning structure 12; multiple lifting ears 13 can be installed on the base 11 at intervals, and multiple lifting ears 13 are located outside the positioning structure 12. The lifting ears 13 are used to connect the hook of the first lifting device, so as to facilitate the lifting of the entire assembly tool 1 and the roller sleeve 31 together through the first lifting device.

[0058] In the above step S1, the heating device can be a heat treatment furnace, which uses the heat treatment furnace to generate high temperature by electrically heating the heating rod or electromagnetic induction heating, so as to heat the roller sleeve 31 and the assembly tool 1; the preset temperature is 350°C to 400°C, which can also be understood as the temperature value of the roller sleeve 31 when it is taken out of the heating device, and can meet the optimal temperature value for subsequent assembly with the core shaft 32; the roller sleeve 31 and the assembly tool 1 are heated by the heat treatment furnace, and the roller sleeve 31 can be monitored in real time by a temperature measuring thermocouple during heating to ensure that the temperature of the roller sleeve 31 when it is out of the furnace is not lower than 350°C and not higher than 400°C. For example, the roller sleeve 31 can be heated to 360°C in the heating device.

[0059] In the above step S2, since the roller sleeve 31 is installed on the positioning structure 12 (see Figure 3 As shown), it is helpful to remove the roller sleeve 31 and the assembly tool 1 from the heating device, and the assembly tool 1 can facilitate the lifting operation of the roller sleeve 31 by the first lifting equipment.

[0060] In this embodiment, the roller sleeve 31 and the mandrel 32 of the support roller can be assembled according to the following steps: for example, the roller sleeve 31 is installed on the positioning structure 12 of the assembly tool 1, so that the roller sleeve 31 is limited and fixed by the positioning structure 12, and the roller sleeve 31 and the assembly tool 1 are placed together in a heating device, so that the roller sleeve 31 and the assembly tool 1 are heated to a preset temperature by the heating device, so that the roller sleeve 31 expands to a certain extent under the high temperature heating of the heating device, which is helpful for the roller sleeve 31 to be heated later. 1 and the mandrel 32; take out the roller sleeve 31 and the assembly tool 1 from the heating device, then connect the hook of the first lifting device with the lifting ear 13 of the assembly tool 1, and then lift the assembly tool 1 and the roller sleeve 31 to the assembly position by the first lifting device; lift the mandrel 32 by the second lifting device, and adjust the posture of the mandrel 32 so that the axis of the mandrel 32 is perpendicular to the ground, and finally embed the mandrel 32 in the roller sleeve 31 at the assembly position to assemble and form the support roller.

[0061] In other words, during the assembly process of the roller sleeve 31 and the mandrel 32 of the support roller, the roller sleeve 31 is supported and fixed by the assembly tool 1, and the base 11 of the assembly tool 1 has a lifting lug 13 connected to the first lifting device, so that the first lifting device cooperates with the lifting lug 13 of the assembly tool 1 to achieve a smooth lifting operation of the roller sleeve 31 with a smooth circumferential outer wall. Furthermore, by adjusting the posture of the mandrel 32, the accurate assembly operation of the roller sleeve 31 and the mandrel 32 can be achieved.

[0062] Optionally, before taking out the roller sleeve 31 and the assembly tool 1 from the heating device, the method further includes: measuring the thermal expansion of the roller sleeve 31 to determine the assembly gap between the roller sleeve 31 and the core shaft 32;

[0063] The measuring of the thermal expansion of the roller sleeve 31 comprises:

[0064] Measuring a first inner diameter value of the roller sleeve 31 before heating by a first measuring instrument;

[0065] Measuring a second inner diameter value of the roller sleeve 31 after heating by a second measuring instrument 5;

[0066] The thermal expansion of the roller sleeve 31 is obtained according to the first inner diameter value and the second inner diameter value of the roller sleeve 31 .

[0067] Specifically, since the temperature of the roller sleeve 31 before heating is substantially room temperature or lower than room temperature, the inner diameter of the roller sleeve 31 can be measured by a first measuring instrument such as an inner diameter micrometer to obtain a first inner diameter value, which can be φ950-0.14 mm.

[0068] Since the temperature of the roller sleeve 31 after heating is very high, the inner diameter of the roller sleeve 31 can be measured by the second measuring instrument 5 to obtain a second inner diameter value, and the second inner diameter value can be as small as φ954.1 mm. Figure 4 As shown, the second measuring instrument 5 includes a handle 51 and a measuring rod 52. The measuring rod 52 can be formed by machining a measuring rod with a length of φ954.1 mm on a CNC lathe. The handle 51 can be vertically connected to the center point of the measuring rod 52. After the roller sleeve 31 and the assembly tool 1 are taken out of the heating device, the staff can hold the handle 51 to make the length direction of the measuring rod 52 parallel to the radial direction of the roller sleeve 31, and then make the measuring rod 52 pass smoothly through the inner hole of the roller sleeve 31, so as to measure the inner diameter of the roller sleeve 31 at high temperature to obtain the second inner diameter value.

[0069] Since the roller sleeve 31 is heated in the heating device, based on the principle of thermal expansion and contraction, the second inner diameter value will be greater than the first inner diameter value. Therefore, the thermal expansion of the roller sleeve 31 can be calculated by subtracting the first inner diameter value from the second inner diameter value of the roller sleeve 31. For example, when the second inner diameter value is φ954.1mm and the first inner diameter value is φ950, the thermal expansion of the roller sleeve 31 can be 4.1mm.

[0070] In this optional embodiment, since the thermal expansion of the roller sleeve 31 is measured and the assembly clearance between the roller sleeve 31 and the core shaft 32 is calculated before the roller sleeve 31 and the assembly tool 1 are taken out from the heating device, in other words, the thermal expansion of the roller sleeve 31 can be measured to determine whether the inner diameter of the roller sleeve 31 after heating meets the subsequent assembly conditions with the core shaft 32; and the assembly clearance between the roller sleeve 31 and the core shaft 32 is calculated to determine whether the assembly clearance between the core shaft 32 and the roller sleeve 31 after the subsequent assembly meets the relevant requirements.

[0071] Optionally, determining the assembly gap between the roller sleeve 31 and the core shaft 32 includes:

[0072] Measuring the outer diameter of the mandrel 32;

[0073] According to the second inner diameter value of the roller sleeve 31 and the outer diameter value of the mandrel 32 , an assembly gap between the roller sleeve 31 and the mandrel 32 is obtained.

[0074] Specifically, the outer diameter value of the main structure of the core shaft 32 can be measured by an outer diameter micrometer.

[0075] The second inner diameter of the roller sleeve 31 can be subtracted from the outer diameter of the mandrel 32 to obtain the assembly clearance between the roller sleeve 31 and the mandrel 32. For example, the interference between the roller sleeve 31 and the mandrel 32 can be 1.6 mm, and the assembly clearance between the roller sleeve 31 and the mandrel 32 can be calculated as 2.5 mm, that is, as long as the assembly clearance between the roller sleeve 31 and the mandrel 32 is greater than 2.5 mm, it is helpful for the mandrel 32 to be smoothly embedded in the inner hole of the roller sleeve 31.

[0076] In this optional embodiment, by measuring the outer diameter value of the core shaft 32 and calculating the assembly clearance between the roller sleeve 31 and the core shaft 32, it can be used as a measure to determine whether the subsequent assembly clearance between the heated roller sleeve 31 and the core shaft 32 meets the relevant parameter requirements, thereby ensuring that the subsequent assembly operation of the roller sleeve 31 and the core shaft 32 meets the relevant quality requirements.

[0077] Optionally, S2, connecting the hook of the first lifting device with the lifting ear 13 to lift the assembly tool 1 and the roller sleeve 31 to the assembly position includes:

[0078] S21, connecting the hook of the first lifting device to the heated lifting lug 13;

[0079] S22, hoisting the assembly tool 1 and the roller sleeve 31 by the first hoisting equipment and transferring them to the assembly position;

[0080] S23, adjusting the roller sleeve 31 so that the axis of the roller sleeve 31 is perpendicular to the ground.

[0081] Specifically, in step S21 , the first lifting device may be a crane; a plurality of hooks of the first lifting device may be connected to the corresponding lifting ears 13 of the heated assembly tooling 1 , respectively, so as to prepare for the lifting and transfer of the roller sleeve 31 .

[0082] In step S22, the staff may operate the first lifting equipment to lift the assembly tool 1 and the roller sleeve 31, and transfer them to the assembly position; the assembly position may be the location of the assembly platform.

[0083] Among them, combined Figure 5 As shown, a support surface 4 is provided on the assembly position or assembly platform, and an adjustable pad 2 can be provided on the support surface 4, and a plurality of adjustable pads 2 are arranged in an annular pattern, and the assembly tool 1 can be placed on the plurality of adjustable pads 2 under the lifting action of the first lifting device. The support surface 4 can be the ground, or a support box at a certain height from the ground. The adjustable pad 2 refers to a pad iron with different heights.

[0084] The roller sleeve 31 and the assembly tool 1 are hoisted together and transferred to the assembly position by the first hoisting equipment, so as to prepare for the subsequent assembly work of the roller sleeve 31 and the core shaft 32 at the assembly position.

[0085] In step S23 , the horizontality and verticality of the roller sleeve 31 can be adjusted by replacing adjustable spacers 2 of different heights until the axis of the roller sleeve 31 is perpendicular to the ground, thereby preparing for the assembly of the roller sleeve 31 and the subsequent mandrel 32 .

[0086] Optionally, S3, lifting the mandrel 32 by a second lifting device and adjusting the posture of the mandrel 32 includes:

[0087] S31, fixing the clamp of the second lifting device to the core shaft 32;

[0088] S32, lifting the mandrel 32 by the second lifting equipment;

[0089] S33, adjusting the posture of the core shaft 32 so that the axis of the core shaft 32 is perpendicular to the ground.

[0090] Specifically, in step S31 , before the roller sleeve 31 is heated, it can be fixed to the core shaft 32 through a clamp, and the clamp can be a clamp structure.

[0091] In step S32 , the second lifting device may be another overhead crane different from the one for lifting the roller sleeve 31 ; after the clamp and the mandrel 32 are fixed, the mandrel 32 may be lifted by the second lifting device.

[0092] In step S33, the verticality of the current spindle 32 can be detected by an instrument such as a verticality checker, a level ruler, etc., and the posture of the spindle 32 can be adjusted until the axis of the spindle 32 is perpendicular to the ground.

[0093] It should be noted that the posture of the lifting mandrel 32 should be absolutely close to vertical. Through slope calculation, the distance difference between the end circumference of the mandrel 32 and the end face of the roller sleeve 31 when the mandrel 32 falls should not exceed 1.35mm. If it is greater than this value, the mandrel 32 is likely to be out of coaxiality with the roller sleeve 31 or tilted, which will cause assembly failure.

[0094] In this optional embodiment, the core shaft 32 is lifted by a second lifting device, and the verticality of the core shaft 32 after lifting is detected and adjusted until the axis of the core shaft 32 is perpendicular to the ground, thereby saving time for the subsequent accurate assembly of the core shaft 32 and the roller sleeve 31.

[0095] Optionally, S4, assembling the mandrel 32 in the roller sleeve 31 includes:

[0096] S41, moving the mandrel 32 to the assembly position by the second lifting device, and placing the mandrel 32 above the roller sleeve 31;

[0097] S43, dropping the core shaft 32 into the roller sleeve 31.

[0098] Specifically, in step S41, after the first lifting equipment transfers the roller sleeve 31 to the assembly position, the mandrel 32 with the adjusted posture can be moved to the assembly position by the second lifting equipment, and the mandrel 32 is placed above the roller sleeve 31, thereby preparing for the subsequent assembly of the mandrel 32 and the roller sleeve 31.

[0099] In step S43 , the second lifting device may be operated to drop the mandrel 32 so as to embed the mandrel 32 in the roller sleeve 31 .

[0100] Optionally, S4, assembling the mandrel 32 in the roller sleeve 31 further comprises:

[0101] Before the core shaft 32 is dropped into the roller sleeve 31 , in step S42 , the gap between the outer wall of the core shaft 32 and the inner wall of the roller sleeve 31 is measured and adjusted until the circumferential gap between the core shaft 32 and the roller sleeve 31 is uniform.

[0102] Specifically, in step S42, the gap between the outer wall of the core shaft 32 and the inner wall of the roller sleeve 31 can be measured and adjusted in the following manner. For example, when part of the core shaft 32 is embedded in the roller sleeve 31, a plurality of first points can be marked at the top port of the roller sleeve 31, and a plurality of second points corresponding to the plurality of first points can be marked on the outer wall of the core shaft 32, wherein the plurality of first points are evenly distributed at the top port of the roller sleeve 31, and similarly, the plurality of second points are evenly distributed at the circumferential outer wall of the core shaft 32, and then the gap between one of the points of the roller sleeve 31 and the core shaft 32 can be calculated by measuring the distance between each second point relative to the first point, and the circumferential gaps between the plurality of points of the roller sleeve 31 and the core shaft 32 can be calculated by corresponding the plurality of second points to the plurality of first points respectively.

[0103] Then, the position of the mandrel 32 relative to the roller sleeve 31 can be adjusted accordingly according to the multiple gaps corresponding to the multiple points, until the circumferential gaps between the mandrel 32 and the roller sleeve 31 are the same (or uniform).

[0104] And the state that the core shaft 32 is completely embedded in the roller sleeve 31 can be seen Figure 6 shown.

[0105] In this optional embodiment, before the core shaft 32 falls into the roller sleeve 31, the gap between the outer wall of the core shaft 32 and the inner wall of the roller sleeve 31 is measured and adjusted to ensure that the core shaft 32 falls into the roller sleeve 31 smoothly in a vertical posture, thereby improving the accuracy and coaxiality of the assembly of the core shaft 32 and the roller sleeve 31.

[0106] Combination Figure 2 As shown, an embodiment of the present invention provides an assembly tool for a support roller, which is used to implement the assembly method of the support roller as described in the above embodiment. The assembly tool for the support roller includes a base 11, a positioning structure 12 and a plurality of lifting ears 13. The positioning structure 12 is arranged on the base 11, and the plurality of lifting ears 13 are arranged on the base 11 around the positioning structure 12.

[0107] Specifically, the lifting ear 13 can be an arc-shaped lifting ear, and multiple lifting ears 13 can be respectively arranged at the corners of the upper end surface of the base 11 to avoid the positioning structure 12; and multiple lifting ears 13 are installed on the base 11 at intervals, so that when the first lifting equipment lifts the assembly tool 1, the force borne by the base 11 around is relatively balanced, so as to improve the lifting stability of the assembly tool 1.

[0108] The lifting lug 13 can be made of 50mm thick steel plate, and its strength can fully meet the weight lifting operation of the roller sleeve 31 and the assembly tool 1. The upper and lower end surfaces of the base 11 can be 1600×1600mm squares with a thickness of 200mm, thereby ensuring that the base 11 has sufficient supporting strength.

[0109] The beneficial effects of the assembly tooling of the support roller of this embodiment relative to the prior art are the same as those of the assembly method of the support roller described above, and will not be described in detail here.

[0110] Optionally, combined Figure 2 and Figure 3 As shown, the positioning structure 12 includes a plurality of positioning blocks 121, and the plurality of positioning blocks 121 are arranged on the base 11 in a ring-shaped interval. The end surface of the positioning block 121 away from the base 11 is provided with an arc groove 1210, and the arc groove 1210 corresponding to the plurality of positioning blocks 121 is used to place the roller sleeve 31 of the supporting roller.

[0111] Specifically, a plurality of positioning blocks 121 may be fixed on the base 11 in an annular manner, wherein the positioning blocks 121 may be fixed on the base 11 by welding. The number of positioning blocks 121 may be four (see Figure 2 shown).

[0112] An arc groove 1210 may be provided on the end surface of each positioning block 121 away from the base 11, for example, the upper end surface. When the roller sleeve 31 is placed in the arc grooves 1210 corresponding to the multiple positioning blocks 121 of the positioning structure 12, the roller sleeve 31 may be radially limited by the arc grooves 1210 of the multiple positioning blocks 121, thereby reducing the possibility of the roller sleeve 31 being offset or misaligned on the positioning structure 12.

[0113] Optionally, the base 11 is provided with a through hole 111 for the core shaft 32 of the supporting roller to pass through; the positioning block 121 has a positioning protrusion 1211 on the inner edge of the arc groove 1210, and the positioning protrusions 1211 of multiple positioning blocks 121 together constitute a positioning support part, and the core shaft 32 includes multiple structural segments 321 connected in sequence and with different diameters, the inner diameter of the positioning support part is smaller than the part of the structural segment 321 of the core shaft 32, and the positioning support part is used to support the core shaft 32 of the supporting roller.

[0114] Specifically, a through hole 111 is provided at the center of the base 11. After the mandrel 32 is assembled in the roller sleeve 31, the bottom of the mandrel 32 passes through the through hole 111. Each positioning block 121 may be an arc block structure. A positioning protrusion 1211 may be provided at the inner edge of the arc groove 1210 on the positioning block 121. The positioning protrusion 1211 may be integrally formed on the positioning block 121. The multiple positioning protrusions 1211 corresponding to the multiple positioning blocks 121 may form a positioning support portion. The positioning support portion may be a non-closed loop annular support structure. The positioning support portion has a positioning stop for the mandrel 32 to pass through.

[0115] Combination Figure 7 As shown, the mandrel 32 includes structural segments 321 connected in sequence and having different diameters. The structural segment 321 in the middle of the mandrel 32 can be the main structure of the mandrel 32. When the mandrel 32 is embedded in the roller sleeve 31, the bottom of the mandrel 32 passes through the positioning stop of the positioning support part and the through hole 111 of the base 11, and the main structure of the mandrel 32 is on the positioning support part (see Figure 6 As shown), the core shaft 32 is axially limited and supported by the positioning support portion to prevent the core shaft 32 from falling downwardly out of the roller sleeve 31 under the action of gravity.

[0116] In addition, the heights of the plurality of positioning protrusions 1211 are the same, for example, may be 5 mm, and the width of the positioning protrusion 1211 may be 40 mm, so as to ensure that the positioning protrusion 1211 has sufficient supporting strength for the core shaft 32 .

[0117] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A method for assembling a support roller, suitable for an assembly tool (1), characterized in that: The assembly tool (1) comprises a base (11), a positioning structure (12) and a plurality of lifting ears (13); the positioning structure (12) is arranged on the base (11); the plurality of lifting ears (13) are arranged on the base (11) around the positioning structure (12); the support roller comprises a roller sleeve (31) and a core shaft (32); the assembly method of the support roller comprises the following steps: The roller sleeve (31) is mounted on the positioning structure (12), and the roller sleeve (31) and the assembly tool (1) are heated to a preset temperature by a heating device; Taking out the roller sleeve (31) and the assembly tool (1) from the heating device, connecting them with the lifting lug (13) via a lifting hook of a first lifting device, and lifting the assembly tool (1) and the roller sleeve (31) to an assembly position; Lifting the mandrel (32) by means of a second lifting device, and adjusting the posture of the mandrel (32); The core shaft (32) is assembled in the roller sleeve (31).

2. The method for assembling a support roller according to claim 1, characterized in that: Before taking out the roller sleeve (31) and the assembly tool (1) from the heating device, the method further includes: measuring the thermal expansion of the roller sleeve (31) to determine the assembly gap between the roller sleeve (31) and the core shaft (32); The measuring of the thermal expansion of the roller sleeve (31) comprises: Measuring a first inner diameter value of the roller sleeve (31) before heating by a first measuring instrument; Measuring a second inner diameter value of the roller sleeve (31) after heating by a second measuring instrument (5); The thermal expansion of the roller sleeve (31) is obtained according to the first inner diameter value and the second inner diameter value of the roller sleeve (31).

3. The method for assembling a support roller according to claim 2, characterized in that: Determining the assembly gap between the roller sleeve (31) and the core shaft (32) comprises: Measuring the outer diameter of the mandrel (32); According to the second inner diameter value of the roller sleeve (31) and the outer diameter value of the mandrel (32), an assembly clearance between the roller sleeve (31) and the mandrel (32) is obtained.

4. The method for assembling a support roller according to claim 1, characterized in that: The method of connecting the hook of the first lifting device to the lifting ear (13) and lifting the assembly tool (1) and the roller sleeve (31) to the assembly position comprises: Connecting the hook of the first lifting device to the heated lifting lug (13); The assembly tool (1) and the roller sleeve (31) are hoisted and transferred to the assembly position by the first hoisting equipment; The roller sleeve (31) is adjusted in posture so that the axis of the roller sleeve (31) is perpendicular to the ground.

5. The method for assembling a support roller according to claim 1, characterized in that: The step of lifting the mandrel (32) by means of a second lifting device and adjusting the posture of the mandrel (32) comprises: Fixing the clamp of the second lifting device to the core shaft (32); Lifting the mandrel (32) by means of the second lifting device; The core shaft (32) is adjusted in posture so that the axis of the core shaft (32) is perpendicular to the ground.

6. The method for assembling a support roller according to claim 1, characterized in that: The step of assembling the core shaft (32) in the roller sleeve (31) comprises: The mandrel (32) is moved to the assembly position by the second lifting device, and the mandrel (32) is placed above the roller sleeve (31); The core shaft (32) is dropped into the roller sleeve (31).

7. The method for assembling a support roller according to claim 6, characterized in that: The step of assembling the core shaft (32) in the roller sleeve (31) further comprises: Before the core shaft (32) is dropped into the roller sleeve (31), the gap between the outer wall of the core shaft (32) and the inner wall of the roller sleeve (31) is measured and adjusted until the circumferential gap between the core shaft (32) and the roller sleeve (31) is uniform.

8. An assembly tool for a support roller, characterized in that: The method for assembling a support roller according to any one of claims 1 to 7 is used, wherein the assembly tooling of the support roller comprises a base (11), a positioning structure (12) and a plurality of lifting ears (13), wherein the positioning structure (12) is arranged on the base (11), and the plurality of lifting ears (13) are arranged on the base (11) around the positioning structure (12).

9. The assembly tool for the support roller according to claim 8, characterized in that: The positioning structure (12) comprises a plurality of positioning blocks (121), wherein the plurality of positioning blocks (121) are arranged on the base (11) in an annular manner and at intervals, and an arc-shaped groove (1210) is provided on the end surface of the positioning block (121) away from the base (11), and the roller sleeve (31) of the supporting roller is placed in the arc-shaped groove (1210) corresponding to the plurality of positioning blocks (121).

10. The assembly tool for the support roller according to claim 9, characterized in that: The base (11) is provided with a through hole (111) for the core shaft (32) of the supporting roller to pass through; the positioning block (121) has a positioning protrusion (1211) on the inner edge of the arc groove (1210); the positioning protrusions (1211) of a plurality of the positioning blocks (121) together form a positioning support portion; the core shaft (32) includes a plurality of structural segments (321) connected in sequence and having different diameters; the inner diameter of the positioning support portion is smaller than that of a portion of the structural segment (321) of the core shaft (32); and the positioning support portion is used to support the core shaft (32) of the supporting roller.

Images