A heat treatment apparatus and a heat treatment method for separating a roll shaft and a roll sleeve

Abstract

This invention relates to a heat treatment device and method for separating roller shafts and roller sleeves, comprising a first base, a first lifting mechanism, an upper center, a second base, a first mounting base, a receiving component, a lower center, a second lifting mechanism, and a heating induction coil. The first mounting base has a first through hole for the lower center to pass through, and the first mounting base is fitted over the lower center. The receiving component has a second through hole for the lower center to pass through, and the receiving component is mounted on the first mounting base and fitted over the lower center. The heating induction coil heats the outer surface of the roller sleeve, causing the roller sleeve to separate from the roller shaft. The receiving component catches the fallen roller sleeve. Unlike existing technologies, this invention does not require damage to the roller shaft; both the roller shaft and roller sleeve can be reused. It has a short processing cycle, saves significant processing costs, and enables rapid separation of the roller sleeve and roller shaft.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology, and in particular to a heat treatment device and method for separating roller shafts and roller sleeves. Background Technology

[0002] In the production process of trouser finishing rollers, an interference fit is used. The roller sleeve is heated to 150-300℃ and then heat-fitted onto the roller shaft, with an interference amount of 0.03-0.15mm. In actual use, if the roller shaft needs to be replaced, or if the roller sleeve's hardness is unsuitable, the roller shaft and roller sleeve need to be separated. However, due to the high value of the roller sleeve, current technology requires the roller shaft to be sawed into two sections using a saw, followed by wire cutting to remove the middle section of the roller shaft. This is time-consuming, labor-intensive, involves a large amount of processing, and also damages and scraps the roller shaft.

[0003] Existing surface heat treatment equipment for rollers and sleeves, such as the dual-purpose medium-frequency quenching machine tool for rollers and sleeves disclosed in patent publication number CN206843539U, includes a bed, which comprises a vertical stand and a platform. A lifting mechanism is mounted on the vertical stand, and an induction coil is mounted on the lifting mechanism. A chuck is fixedly mounted on the platform, and the chuck is coaxial with the induction coil. This equipment can handle the quenching of both rollers and sleeves, effectively saving equipment costs.

[0004] The existing technology has the following problems:

[0005] The existing roller shaft and roller sleeve separation process requires destroying the roller shaft, which is time-consuming and labor-intensive. If the existing roller shaft and roller sleeve surface heat treatment equipment reheats the roller sleeve, the high power will cause the high-speed steel roller sleeve to crack and be damaged due to rapid heating.

[0006] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Summary of the Invention

[0007] Therefore, there is a need to provide a heat treatment device and method for separating roller shafts and sleeves, in order to solve the technical problem that the existing roller shaft and sleeve separation process requires damaging the roller shaft, which is time-consuming and labor-intensive.

[0008] To achieve the above objectives, in a first aspect, the present invention provides a heat treatment apparatus for separating roller shafts and roller sleeves, comprising a first base, a first lifting mechanism, an upper center, a second base, a first mounting base, a receiving component, a lower center, a second lifting mechanism, and a heating induction coil.

[0009] The first lifting mechanism is mounted on the first machine base, the upper center is mounted on the first lifting mechanism, and the first lifting mechanism is used to drive the upper center to move up and down in the vertical direction. The second machine base is mounted on one side of the first machine base, and the lower center is mounted on the second machine base. The lower center and the upper center are coaxially arranged, and the lower center and the upper center cooperate with each other to fix the roller shaft.

[0010] The first mounting base is mounted on the second base. The first mounting base is provided with a first through hole for the lower center to pass through. The first mounting base is sleeved on the lower center. The receiving member is provided with a second through hole for the lower center to pass through. The receiving member is mounted on the first mounting base and sleeved on the lower center.

[0011] The second lifting mechanism is mounted on the first base, and the heating induction coil is mounted on the second lifting mechanism. The heating induction coil is positioned between the upper center and the lower center, and is coaxial with the lower center. The second lifting mechanism drives the heating induction coil to move up and down vertically. The inner diameter of the heating induction coil is larger than the outer diameter of the roller sleeve. The heating induction coil heats the outer surface of the roller sleeve. When the surface temperature of the roller sleeve reaches a preset temperature, a temperature difference is formed between the roller sleeve and the roller shaft, causing the roller sleeve to separate from the roller shaft. The receiving member is used to receive the fallen roller sleeve, and the top of the first mounting base protrudes beyond the top of the receiving member.

[0012] Unlike existing technologies, the above technical solution involves an upper center mounted on a first lifting mechanism, which drives the upper center to move vertically up and down. A lower center is mounted on a second base, coaxially arranged with the upper center, and the two centers cooperate to fix the roller shaft. A first mounting base is mounted on the second base, having a first through hole for the lower center to pass through. The first mounting base is fitted over the lower center. A receiving member has a second through hole for the lower center to pass through, and is mounted on the first mounting base, fitted over the lower center. The second lifting mechanism drives a heating induction coil to move vertically up and down. The inner diameter of the heating induction coil is larger than the outer diameter of the roller sleeve. The heating induction coil heats the outer surface of the roller sleeve until the surface temperature reaches a preset temperature, creating a temperature difference between the roller sleeve and the roller shaft, causing the roller sleeve to separate from the roller shaft. The receiving member catches the fallen roller sleeve. In this way, by utilizing the skin effect, the eddy current at medium frequency is concentrated on the surface of the workpiece, with a moderate penetration depth, allowing the roller to heat up and expand rapidly while the shaft remains unheated. This rapid heating creates a temperature difference that separates the roller sleeve and the roller shaft. The receiving component catches the fallen roller sleeve, and the top of the first mounting base can limit the displacement of the roller sleeve. There is no need to damage the roller shaft, and both the roller shaft and the roller sleeve can be reused. The processing cycle is short, and a lot of processing costs are saved. This method can achieve rapid separation of the roller sleeve and the roller shaft.

[0013] In one embodiment of the present invention, the first mounting base includes a mounting platform, a first leg, a second leg, a third leg, and a fourth leg. The mounting platform has a rectangular cross-sectional shape. The first leg, the second leg, the third leg, and the fourth leg are respectively connected to the four corners of the mounting platform. The first through hole is located at the center of the mounting platform.

[0014] Thus, the first, second, third, and fourth legs are connected to the four corners of the mounting platform, respectively, so that the lower center can pass through the first through hole of the mounting platform. The mounting platform supports the receiving component, and the receiving component catches the falling roller sleeve.

[0015] In one embodiment of the present invention, the four sides of the installation platform are respectively provided with a first limiting part, a second limiting part, a third limiting part, and a fourth limiting part. The first limiting part, the second limiting part, the third limiting part, and the fourth limiting part extend in a vertical direction. The first limiting part, the second limiting part, the third limiting part, and the fourth limiting part are connected in sequence to form a rectangular frame. The receiving member is disposed within the rectangular frame.

[0016] In this way, a rectangular frame is formed by connecting the first limiting part, the second limiting part, the third limiting part and the fourth limiting part in sequence, which can limit the receiving part and ensure that the receiving part is located below the roller sleeve, preventing the receiving part from moving at will and damaging the lower center.

[0017] In one embodiment of the present invention, a fifth limiting part is provided at the top of the first support leg, a sixth limiting part is provided at the top of the second support leg, a seventh limiting part is provided at the top of the third support leg, and an eighth limiting part is provided at the top of the fourth support leg. The height of the fifth, sixth, seventh, and eighth limiting parts in the vertical direction is greater than the height of the mounting platform in the vertical direction.

[0018] Thus, since the height of the fifth, sixth, seventh, and eighth limiting parts in the vertical direction is greater than the height of the installation platform in the vertical direction, the fifth, sixth, seventh, and eighth limiting parts can limit the falling roller sleeve.

[0019] In one embodiment of the present invention, the bottom of the first leg is provided with a first support portion, which extends horizontally; the bottom of the second leg is provided with a second support portion, which extends horizontally; the bottom of the third leg is provided with a third support portion, which extends horizontally; and the bottom of the fourth leg is provided with a fourth support portion, which extends horizontally.

[0020] In this way, the first support part, the second support part, the third support part, and the fourth support part can increase the bottom force-bearing area of ​​the first mounting base, improve the stability of the first mounting base, and reduce the impact force of the first mounting base on the second machine base after the roller sleeve falls off.

[0021] In one embodiment of the present invention, the cross-sectional shape of the first through hole is rectangular, the cross-sectional shape of the receiving member is circular, the outer diameter of the receiving member is greater than or equal to the diagonal of the first through hole, the receiving member has a preset thickness, and the cross-sectional shape of the second through hole is circular.

[0022] Thus, the outer diameter of the receiving part is greater than or equal to the diagonal dimension of the first through hole, allowing the receiving part to be secured on the mounting platform and prevent it from falling out of the first through hole. The receiving part also has a preset thickness, which improves its service life.

[0023] In one embodiment of the present invention, the thickness of the receiving member is less than the height of the fifth limiting part, the sixth limiting part, the seventh limiting part, and the eighth limiting part in the vertical direction.

[0024] Therefore, the fifth, sixth, seventh, and eighth limiting parts must be higher than the highest point of the receiving part by a preset length in order to limit the falling roller sleeve.

[0025] In one embodiment of the present invention, the diagonal dimension of the mounting platform is larger than the outer diameter of the heating induction coil.

[0026] Thus, the diagonal dimension of the mounting platform is larger than the outer diameter of the heating induction coil, allowing the heating induction coil to move up and down inside the first, second, third, and fourth legs without interfering with each other.

[0027] In one embodiment of the present invention, the heat treatment equipment further includes a first height sensor, a second height sensor, and a controller. The first height sensor is used to detect the height of the receiving component in the vertical direction. The first height sensor is connected to the controller and transmits data to the controller. The second height sensor is used to detect the height of the heating induction coil in the vertical direction. The second height sensor is connected to the controller and transmits data to the controller. The controller is connected to and controls the second lifting mechanism. The controller controls the second lifting mechanism based on the height of the receiving component in the vertical direction and the height of the heating induction coil in the vertical direction.

[0028] Thus, the positions of the receiving component and the heating induction coil are monitored by the first height sensor and the second height sensor respectively, thereby controlling the second lifting mechanism. In order to limit the position of the heating induction coil and prevent it from hitting the receiving component, which would cause damage to the heating induction coil and the receiving component.

[0029] To achieve the above objectives, in a second aspect, the present invention also provides a heat treatment method for separating roller shafts and roller sleeves, comprising the heat treatment equipment for separating roller shafts and roller sleeves as described in any one of the preceding claims, including the following steps:

[0030] The light roller is vertically suspended above the lower center point, so that the axis of the light roller is parallel to the vertical direction. The light roller is moved downward in the vertical direction, passing through the heating induction coil. The bottom center of the light roller rests on the lower center point, keeping the axis of the light roller parallel to the vertical direction. The first lifting mechanism drives the upper center point to move downward, and the upper center point rests on the top center of the light roller. The hoisting equipment releases the light roller.

[0031] The second lifting mechanism drives the heating induction coil to move vertically to a designated position on the roller sleeve of the light roller. The inner wall of the heating induction coil and the outer surface of the roller sleeve of the light roller are at a preset distance. The heating induction coil is turned on with a preset power to heat the outer surface of the roller sleeve of the light roller, creating a temperature difference between the roller sleeve and the roller shaft. The second lifting mechanism drives the heating induction coil to move up and down vertically. When the surface temperature of the roller sleeve reaches the preset temperature, the surface of the roller sleeve is struck with a copper rod, causing the roller sleeve of the light roller to separate from the roller shaft and fall onto the receiving part.

[0032] The first mounting base limits the roller sleeve that falls onto the receiving part and cools the roller sleeve. The hoisting equipment fixes the roller shaft and keeps the axial direction of the roller shaft parallel to the vertical direction. The first lifting mechanism drives the upper center to move upward. The hoisting equipment lifts the roller shaft upward in the vertical direction, leaving the roller sleeve on the receiving part. The roller shaft and roller sleeve are removed upward in the vertical direction, and the equipment is reset.

[0033] Unlike existing technologies, the technical solution of this application uses a lower center and an upper center to fix the bottom and top of the optical roller respectively. The heating induction coil uses a preset power and is turned on to heat the outer surface of the roller sleeve of the optical roller, creating a temperature difference between the roller sleeve and the roller shaft. The second lifting mechanism drives the heating induction coil to move up and down vertically. When the surface temperature of the roller sleeve reaches the preset temperature, a copper rod is used to strike the surface of the roller sleeve, causing the roller sleeve to separate from the roller shaft. The roller sleeve falls onto the receiving part, and the first mounting base limits the roller sleeve that has fallen onto the receiving part. The roller sleeve is cooled by air cooling or water cooling, and then the roller shaft and roller sleeve are removed respectively. In this way, by utilizing the skin effect, the eddy current at medium frequency is concentrated on the surface of the workpiece, with a moderate penetration depth, allowing the roller sleeve to heat up and expand rapidly, while the roller shaft does not heat up. The rapid heating creates a temperature difference, separating the roller sleeve and the roller shaft. The receiving component catches the fallen roller sleeve. The heating induction coil uses a preset power, about half of the normal heating and quenching power. Because rapid heating of high-speed steel roller sleeves will cause them to crack, a low power is used to slowly heat the surface of the roller sleeve back and forth. When the surface temperature of the roller sleeve reaches about 70-100℃, the roller sleeve is manually tapped with a copper rod to vibrate, and the roller sleeve and the roller shaft can be separated, avoiding the problem of the roller sleeve cracking and being damaged.

[0034] The above description of the invention is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description

[0035] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.

[0036] In the accompanying drawings of the instruction manual:

[0037] Figure 1 This is a schematic diagram of the structure of a heat treatment device for separating roller shafts and roller sleeves according to an embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the structure of a protective cover for a heat treatment equipment used for separating roller shafts and roller sleeves according to an embodiment of this application;

[0039] Figure 3 This is a front view of a heat treatment apparatus according to an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the use state of a heat treatment apparatus according to an embodiment of this application. Figure 1 ;

[0041] Figure 5 This is a schematic diagram of the use state of a heat treatment apparatus according to an embodiment of this application. Figure 2 ;

[0042] Figure 6 This is a schematic diagram of the structure of a heating induction coil according to an embodiment of this application;

[0043] Figure 7 This is a schematic diagram of the structure of the first mounting base according to an embodiment of this application;

[0044] Figure 8 This is a schematic diagram of the structure of a receiving component according to one embodiment of this application;

[0045] Figure 9 This is a circuit diagram of a heat treatment apparatus according to an embodiment of this application;

[0046] Figure 10 This is a flowchart of a heat treatment method for separating roller shafts and roller sleeves according to an embodiment of this application.

[0047] The reference numerals used in the above figures are explained as follows:

[0048] a. The distance from the inner wall of the heating induction coil to the outer wall of the roller sleeve.

[0049] 1. First base frame,

[0050] 2. First lifting mechanism,

[0051] 3. Reach the top level.

[0052] 4. Second base,

[0053] 5. First mounting base; 51. First through hole; 52. Mounting platform; 521. First limiting part; 522. Second limiting part; 523. Third limiting part; 524. Fourth limiting part; 53. First support leg; 531. Fifth limiting part; 532. First support part; 54. Second support leg; 541. Sixth limiting part; 542. Second support part; 55. Third support leg; 551. Seventh limiting part; 552. Third support part; 56. Fourth support leg; 561. Eighth limiting part; 562. Fourth support part.

[0054] 6. Receiving component; 61. Second through hole;

[0055] 7. Lower tip,

[0056] 8. Second lifting mechanism,

[0057] 9. Heating the induction coil,

[0058] 10. First height sensor; 11. Second height sensor; 12. Controller; 13. Roller shaft; 14. Roller sleeve; 15. Protective cover; 16. Power supply mechanism. Detailed Implementation

[0059] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0060] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0061] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0062] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, X and / or Y means: X exists, Y exists, and X and Y exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0063] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0064] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar open-ended expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0065] As understood in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0066] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0067] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral arrangement; it can be a direct connection or an indirect connection through an intermediate medium; it can be a relationship of two components combined together, an interaction relationship between two components, or a connection within two structures. Those skilled in the art to which this application pertains can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0068] The existing roller shaft and roller sleeve separation process requires destroying the roller shaft, which is time-consuming and labor-intensive. If the existing roller shaft and roller sleeve surface heat treatment equipment reheats the roller sleeve, the high power will cause the high-speed steel roller sleeve to crack and be damaged due to rapid heating.

[0069] In view of this, embodiments of this application provide a heat treatment device and method for separating roller shafts and roller sleeves. A lower center 7 and an upper center 3 cooperate to fix the roller shaft 13. A first mounting base 5 is mounted on a second base 4, and the first mounting base 5 has a first through hole 51 accommodating the passage of the lower center 7. The first mounting base 5 is sleeved outside the lower center 7. A receiving member 6 has a second through hole 61 accommodating the passage of the lower center 7. The receiving member 6 is mounted on the first mounting base 5 and sleeved outside the lower center 7. A second lifting mechanism 8 drives a heating induction coil 9 to move vertically up and down. The inner diameter of the heating induction coil 9 is larger than the outer diameter of the roller sleeve 14. The heating induction coil 9 heats the outer surface of the roller sleeve 14. When the surface temperature of the roller sleeve reaches a preset temperature, a temperature difference is formed between the roller sleeve and the roller shaft, causing the roller sleeve 14 to separate from the roller shaft 13. The receiving member 6 catches the fallen roller sleeve 14. Utilizing the skin effect, the eddy current at medium frequency is concentrated on the surface of the workpiece, with a moderate penetration depth, allowing the roller to heat up and expand rapidly while the shaft remains unheated. This rapid heating creates a temperature difference, separating the roller sleeve and the roller shaft. The receiving component catches the fallen roller sleeve without damaging the roller shaft 13. Both the roller shaft 13 and the roller sleeve 14 can be reused. This method has a short processing cycle and saves a significant amount of processing costs, enabling rapid separation of the roller sleeve 14 and the roller shaft 13.

[0070] According to some embodiments of this application, please refer to Figures 1 to 10 This embodiment relates to a heat treatment device for separating roller shafts and roller sleeves, including a first base 1, a first lifting mechanism 2, an upper center 3, a second base 4, a first mounting base 5, a receiving component 6, a lower center 7, a second lifting mechanism 8, and a heating induction coil 9.

[0071] The first lifting mechanism 2 is set on the first base 1, the upper center 3 is installed on the first lifting mechanism 2, the first lifting mechanism 2 is used to drive the upper center 3 to move up and down in the vertical direction, the second base 4 is set on one side of the first base 1, the lower center 7 is installed on the second base 4, the lower center 7 and the upper center 3 are coaxially arranged, the lower center 7 and the upper center 3 cooperate with each other to fix the roller shaft 13.

[0072] The first mounting base 5 is mounted on the second base 4. The first mounting base 5 is provided with a first through hole 51 to accommodate the passage of the lower tip 7. The first mounting base 5 is sleeved on the lower tip 7. The receiving part 6 is provided with a second through hole 61 to accommodate the passage of the lower tip 7. The receiving part 6 is mounted on the first mounting base 5 and sleeved on the lower tip 7.

[0073] The second lifting mechanism 8 is mounted on the first base 1. The heating induction coil 9 is mounted on the second lifting mechanism 8 and is located between the upper center 3 and the lower center 7. The heating induction coil 9 and the lower center 7 are coaxially arranged. The second lifting mechanism 8 is used to drive the heating induction coil 9 to move up and down in the vertical direction. The inner diameter of the heating induction coil 9 is larger than the outer diameter of the roller sleeve 14. The heating induction coil 9 is used to heat the outer surface of the roller sleeve 14. When the surface temperature of the roller sleeve 14 reaches the preset temperature, a temperature difference is formed between the roller sleeve 14 and the roller shaft 13, causing the roller sleeve 14 to separate from the roller shaft 13. The receiving part 6 is used to receive the fallen roller sleeve 14. The top of the first mounting base 5 protrudes from the top of the receiving part 6.

[0074] In this embodiment, as Figure 3 As shown, the first lifting mechanism 2 and the second lifting mechanism 8 are conventional technologies, capable of lifting via the cooperation of a lead screw and nut, or via the cooperation of a sprocket and chain; the heating induction coil 9 is also a conventional technology, such as... Figure 1 and Figure 4 As shown, the power supply mechanism 16 supplies power to the heating induction coil 9, which is mounted on the mounting bracket, which is mounted on the second lifting mechanism 8.

[0075] In this embodiment, as Figure 6 As shown, the distance 'a' between the inner wall of the heating induction coil 9 and the outer wall of the roller sleeve is between 3mm and 5mm.

[0076] In this embodiment, as Figure 1 and Figure 2 As shown, a protective cover 15 can be installed in front of the heat treatment equipment. The protective cover 15 is transparent and prevents personnel from contacting the heating induction coil 9 and the roller sleeve 14 when heating the roller sleeve 14.

[0077] In this embodiment, a rotating mechanism can be provided to rotate the upper center 3 and the lower center 7, thereby driving the roller shaft and roller sleeve to rotate together, so that the heating induction coil 9 can heat the roller sleeve evenly. Alternatively, an air cooling mechanism or a water cooling mechanism can be provided to cool down the falling roller sleeve, so that the roller sleeve can be quickly removed. All of these are within the protection scope of this embodiment.

[0078] The core of medium-frequency heating is electromagnetic induction + eddy current heating effect + Joule heating effect, which causes the metal workpiece to heat up on its own. The core process is as follows: Power conversion: Industrial frequency AC power is rectified → DC → inverted to generate medium-frequency AC power. Alternating magnetic field: Medium-frequency current is passed into the induction coil, generating a rapidly alternating magnetic field. Eddy current generation: The alternating magnetic field cuts the metal workpiece, inducing a large current (eddy current) in a closed loop. Joule heating: Eddy currents flow through the workpiece's resistance, generating It. 2 R-joule heating ensures rapid temperature rise. Skin effect: Under medium frequency, eddy currents concentrate on the workpiece surface, achieving moderate penetration depth while balancing efficiency and heating uniformity.

[0079] It utilizes the skin effect to rapidly heat and expand the roller sleeve while the roller shaft remains unheated. This rapid heating creates a temperature difference, causing the roller sleeve and roller shaft to separate. The normal outer diameter of the roller sleeve is φ200mm, and the inner diameter of the induction coil is φ210mm. The heating power supply operates at a frequency of 9kHz and a power of 30kW. The induction coil's turns ratio is selected as a small ratio of 4:1 to ensure sufficient power. Two 8kHz capacitors are connected, and the starting frequency is adjusted to 11kHz, with an induction heating power of 30kW. Normal heating and quenching power is 60-70kW, but about half the power is used because rapid heating of the high-speed steel roller sleeve can cause cracking. The roller sleeve is slowly heated back and forth on its surface. When the surface temperature reaches approximately 70-100℃, the roller sleeve is manually vibrated by tapping it with a copper rod, causing the roller sleeve and roller shaft to separate.

[0080] like Figure 4 and Figure 5 This is the state in which part of the roller sleeve 14 has fallen onto the receiving part 6;

[0081] In this embodiment, it also includes a power supply mechanism 16 for supplying power to the heating induction coil 9, a detection mechanism for detecting the power of the heating induction coil 9, and a temperature sensor for detecting the surface temperature of the roller sleeve.

[0082] In this embodiment, the upper center point 3 is mounted on the first lifting mechanism 2, which drives the upper center point 3 to move up and down vertically. The lower center point 7 is mounted on the second base 4, and the lower center point 7 and the upper center point 3 are coaxially arranged. The lower center point 7 and the upper center point 3 cooperate with each other to fix the roller shaft 13. The first mounting base 5 is mounted on the second base 4, and the first mounting base 5 is provided with a first through hole 51 to allow the lower center point 7 to pass through. The first mounting base 5 is sleeved on the lower center point 7. The receiving member 6 is provided with a second through hole 61 to allow the lower center point 7 to pass through. The receiving member 6 is set on the first mounting base 5 and sleeved on the lower center point 7. The second lifting mechanism 8 drives the heating induction coil 9 to move up and down vertically. The inner diameter of the heating induction coil 9 is larger than the outer diameter of the roller sleeve 14. The heating induction coil 9 is used to heat the outer surface of the roller sleeve 14, so that the roller sleeve 14 separates from the roller shaft 13. The receiving member 6 is used to catch the fallen roller sleeve 14. In this way, the heating induction coil 9 can be moved up and down to heat the surface of the roller sleeve 14, causing the roller sleeve 14 to heat up and expand rapidly, while the roller shaft 13 has not yet been heated up, creating a large temperature difference that separates the roller sleeve 14 and the roller shaft 13. The receiving part 6 catches the fallen roller sleeve 14, and the top of the first mounting base 5 can limit the displacement of the roller sleeve 14 without damaging the roller shaft 13. Both the roller shaft 13 and the roller sleeve 14 can be reused, resulting in a short processing cycle and saving a lot of processing costs. This allows for the rapid separation of the roller sleeve 14 and the roller shaft 13.

[0083] According to some embodiments of this application, optionally, such as Figure 7 As shown, the first mounting base 5 includes a mounting platform 52, a first support leg 53, a second support leg 54, a third support leg 55, and a fourth support leg 56. The mounting platform 52 has a rectangular cross-sectional shape. The first support leg 53, the second support leg 54, the third support leg 55, and the fourth support leg 56 are respectively connected to the four corners of the mounting platform 52. The first through hole 51 is located at the center of the mounting platform 52.

[0084] The installation platform 52 is made of steel plate, and the first leg 53, the second leg 54, the third leg 55 and the fourth leg 56 are solid steel pipes, which are welded to the four corners of the installation platform 52.

[0085] Thus, the first leg 53, the second leg 54, the third leg 55 and the fourth leg 56 are respectively connected to the four corners of the mounting platform 52, so that the lower tip 7 can pass through the first through hole 51 of the mounting platform 52. The mounting platform 52 supports the receiving part 6, and the receiving part 6 receives the fallen roller sleeve 14.

[0086] According to some embodiments of this application, optionally, the four sides of the installation platform 52 are respectively provided with a first limiting part 521, a second limiting part 522, a third limiting part 523, and a fourth limiting part 524. The first limiting part 521, the second limiting part 522, the third limiting part 523, and the fourth limiting part 524 extend in the vertical direction. The first limiting part 521, the second limiting part 522, the third limiting part 523, and the fourth limiting part 524 are connected in sequence to form a rectangular frame, and the receiving member 6 is disposed in the rectangular frame.

[0087] The first limiting part 521, the second limiting part 522, the third limiting part 523, and the fourth limiting part 524 are made of steel plate;

[0088] Thus, by connecting the first limiting part 521, the second limiting part 522, the third limiting part 523, and the fourth limiting part 524 in sequence to form a rectangular frame, the receiving part 6 can be limited to ensure that the receiving part 6 is located below the roller sleeve 14, thus preventing the receiving part 6 from moving arbitrarily and damaging the lower center 7.

[0089] According to some embodiments of this application, optionally, a fifth limiting part 531 is provided on the top of the first support leg 53, a sixth limiting part 541 is provided on the top of the second support leg 54, a seventh limiting part 551 is provided on the top of the third support leg 55, and an eighth limiting part 561 is provided on the top of the fourth support leg 56. The height of the fifth limiting part 531, the sixth limiting part 541, the seventh limiting part 551, and the eighth limiting part 561 in the vertical direction is greater than the height of the mounting platform 52 in the vertical direction.

[0090] Thus, since the height of the fifth limiting part 531, the sixth limiting part 541, the seventh limiting part 551, and the eighth limiting part 561 in the vertical direction is greater than the height of the mounting platform 52 in the vertical direction, the fifth limiting part 531, the sixth limiting part 541, the seventh limiting part 551, and the eighth limiting part 561 can limit the falling roller sleeve 14.

[0091] According to some embodiments of this application, optionally, the bottom of the first leg 53 is provided with a first support portion 532, which extends in a horizontal direction; the bottom of the second leg 54 is provided with a second support portion 542, which extends in a horizontal direction; the bottom of the third leg 55 is provided with a third support portion 552, which extends in a horizontal direction; and the bottom of the fourth leg 56 is provided with a fourth support portion 562, which extends in a horizontal direction.

[0092] The first support part 532, the second support part 542, the third support part 552, and the fourth support part 562 are made of steel plates and are welded to the bottom of the first support leg 53, the second support leg 54, the third support leg 55, and the fourth support leg 56 respectively, thereby improving the load-bearing surface of the first support leg 53, the second support leg 54, the third support leg 55, and the fourth support leg 56.

[0093] Thus, the first support part 532, the second support part 542, the third support part 552, and the fourth support part 562 can increase the bottom force-bearing area of ​​the first mounting base 5, improve the stability of the first mounting base 5, and reduce the impact force of the first mounting base 5 on the second machine base 4 after the roller sleeve 14 falls off.

[0094] According to some embodiments of this application, optionally, the cross-sectional shape of the first through hole 51 is rectangular, the cross-sectional shape of the receiving member 6 is circular, the outer diameter of the receiving member 6 is greater than or equal to the diagonal of the first through hole 51, the receiving member 6 has a preset thickness, and the cross-sectional shape of the second through hole 61 is circular.

[0095] The receiving component 6 will not fall off within the installation platform 52;

[0096] Thus, the outer diameter of the receiving part 6 is greater than or equal to the diagonal dimension of the first through hole 51, the receiving part 6 can be locked on the mounting platform 52 and will not fall out of the first through hole 51. The receiving part 6 has a preset thickness, which improves the service life of the receiving part 6.

[0097] According to some embodiments of this application, optionally, the thickness of the receiving member 6 is less than the vertical height of the fifth limiting part 531, the sixth limiting part 541, the seventh limiting part 551, and the eighth limiting part 561.

[0098] In some embodiments, two or more support members 6 may be provided on the installation platform 52. The two or more support members 6 can buffer the falling roller sleeve 14. If the uppermost support member 6 is damaged, it can be replaced in time.

[0099] Thus, the fifth limiting part 531, the sixth limiting part 541, the seventh limiting part 551, and the eighth limiting part 561 must be higher than the highest point of the receiving part 6 by a preset length in order to limit the falling roller sleeve 14.

[0100] According to some embodiments of this application, optionally, the diagonal dimension of the mounting platform 52 is larger than the outer diameter of the heating induction coil 9.

[0101] Thus, the diagonal dimension of the mounting platform 52 is larger than the outer diameter of the heating induction coil 9, allowing the heating induction coil 9 to move up and down inside the first leg 53, the second leg 54, the third leg 55, and the fourth leg 56, without interference between the first leg 53, the second leg 54, the third leg 55, and the fourth leg 56 and the heating induction coil 9.

[0102] According to some embodiments of this application, optionally, such as Figure 9 As shown, the heat treatment equipment also includes a first height sensor 10, a second height sensor 11, and a controller 12. The first height sensor 10 is used to detect the height of the receiving member 6 in the vertical direction. The first height sensor 10 is connected to the controller 12 and transmits data to the controller 12. The second height sensor 11 is used to detect the height of the heating induction coil 9 in the vertical direction. The second height sensor 11 is connected to the controller 12 and transmits data to the controller 12. The controller 12 is connected to and controls the second lifting mechanism 8. The controller 12 controls the second lifting mechanism 8 according to the height of the receiving member 6 in the vertical direction and the height of the heating induction coil 9 in the vertical direction.

[0103] The first height sensor 10 and the second height sensor 11 are respectively connected to the controller 12. The controller 12 is connected to and controls the first lifting mechanism 2, the second lifting mechanism 8, and the heating induction coil 9. It can control the first lifting mechanism 2 to drive the upper center point 3 to press against the top of the roller 13. The controller 12 controls the second lifting mechanism 8 to drive the heating induction coil 9 to move up and down in the vertical direction. It is necessary to avoid the heating induction coil 9 from hitting the upper center point 3 above and the lower receiving part 6 below. The second height sensor 11 limits the heating induction coil 9.

[0104] In other embodiments, other sensors may be provided to detect the height position of the roller sleeve 14 and control the heating induction coil 9 to heat only the roller sleeve 14, avoiding heating the roller shaft 13. For example, a third height sensor and a fourth height sensor may be provided. The third height sensor detects the highest point of the roller sleeve 14, and the fourth height sensor detects the lowest point of the roller sleeve 14. When the heating induction coil 9 is turned on, it only moves up and down between the highest point and the lowest point of the roller sleeve 14.

[0105] Thus, the positions of the receiving component 6 and the heating induction coil 9 are monitored by the first height sensor 10 and the second height sensor 11 respectively, thereby controlling the second lifting mechanism 8. In order to limit the position of the heating induction coil 9 and prevent the heating induction coil 9 from hitting the receiving component 6, which would cause damage to the heating induction coil 9 and the receiving component 6.

[0106] This embodiment also relates to a heat treatment method for separating roller shafts and roller sleeves, including the heat treatment equipment for separating roller shafts and roller sleeves as described in any of the above, comprising the following steps:

[0107] The light roller is vertically suspended above the lower center point 7, so that the axis of the light roller is parallel to the vertical direction. The light roller is moved downward in the vertical direction, passing through the heating induction coil 9. The bottom center of the light roller rests on the lower center point 7, keeping the axis of the light roller parallel to the vertical direction. The first lifting mechanism 2 drives the upper center point 3 to move downward, and the upper center point 3 rests on the top center of the light roller. The hoisting equipment releases the light roller.

[0108] The second lifting mechanism 8 drives the heating induction coil 9 to move vertically to the designated position of the roller sleeve 14 of the light roller. The inner wall of the heating induction coil 9 and the outer surface of the roller sleeve 14 of the light roller are at a preset distance. The heating induction coil adopts a preset power and turns on the heating induction coil 9 to heat the outer surface of the roller sleeve 14 of the light roller. A temperature difference is formed between the roller sleeve and the roller shaft. The second lifting mechanism 8 drives the heating induction coil 9 to move up and down vertically. When the surface temperature of the roller sleeve reaches the preset temperature, the surface of the roller sleeve is struck with a copper rod, and the roller sleeve 14 falls onto the receiving part 6.

[0109] The first mounting base 5 limits the roller sleeve 14 that has fallen onto the receiving part 6. The roller sleeve 14 is cooled by air cooling or water cooling. The hoisting equipment fixes the roller shaft 13 and keeps the axial direction of the roller shaft 13 parallel to the vertical direction. The first lifting mechanism 2 drives the upper center 3 to move upward. The hoisting equipment lifts the roller shaft 13 upward in the vertical direction. The roller sleeve 14 remains on the receiving part 6. The roller shaft 13 is taken out upward in the vertical direction, the roller sleeve 14 is taken out, and the equipment is reset.

[0110] In this embodiment, the bottom and top of the optical roller are fixed by the lower center 7 and the upper center 3 respectively. The heating induction coil adopts a preset power and is turned on to heat the outer surface of the roller sleeve of the optical roller, forming a temperature difference between the roller sleeve and the roller shaft. The second lifting mechanism 8 drives the heating induction coil 9 to move up and down in the vertical direction to heat the outer surface of the roller sleeve 14 of the optical roller. When the surface temperature of the roller sleeve reaches the preset temperature, the surface of the roller sleeve is struck with a copper rod, and the roller sleeve of the optical roller separates from the roller shaft. The roller sleeve 14 falls onto the receiving part 6. The first mounting base 5 limits the roller sleeve 14 that has fallen onto the receiving part 6. The roller sleeve 14 is cooled by air cooling or water cooling. The roller shaft 13 and the roller sleeve 14 are then removed.

[0111] Utilizing the skin effect, the eddy current at medium frequency is concentrated on the surface of the workpiece, with a moderate penetration depth, causing the roller sleeve 14 to heat up and expand rapidly, while the roller shaft 13 does not heat up. The rapid heating creates a temperature difference, separating the roller sleeve 14 and the roller shaft 13. The receiving part 6 catches the fallen roller sleeve 14. The heating induction coil 9 uses a preset power, about half of the normal heating and quenching power. Because rapid heating of high-speed steel roller sleeves will cause cracking, a low power is used to slowly heat the surface of the roller sleeve 14 back and forth. When the surface temperature of the roller sleeve reaches about 70-100℃, the roller sleeve 14 is manually tapped with a copper rod to vibrate, and the roller sleeve 14 and the roller shaft 13 can be separated, avoiding the problem of the roller sleeve 14 cracking and being damaged.

[0112] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of the present invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of the present invention, or equivalent structural or procedural transformations made using the content of the present invention's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of patent protection of the present invention.

Claims

1. A heat treatment device for separating roller shafts and roller sleeves, characterized in that, It includes a first base, a first lifting mechanism, an upper center, a second base, a first mounting base, a receiving component, a lower center, a second lifting mechanism, and a heating induction coil; The first lifting mechanism is mounted on the first machine base, the upper center is mounted on the first lifting mechanism, and the first lifting mechanism is used to drive the upper center to move up and down in the vertical direction. The second machine base is mounted on one side of the first machine base, and the lower center is mounted on the second machine base. The lower center and the upper center are coaxially arranged, and the lower center and the upper center cooperate with each other to fix the roller shaft. The first mounting base is mounted on the second base. The first mounting base is provided with a first through hole for the lower center to pass through. The first mounting base is sleeved on the lower center. The receiving member is provided with a second through hole for the lower center to pass through. The receiving member is mounted on the first mounting base and sleeved on the lower center. The second lifting mechanism is mounted on the first base, and the heating induction coil is mounted on the second lifting mechanism. The heating induction coil is located between the upper center point and the lower center point, and is coaxial with the lower center point. The second lifting mechanism is used to drive the heating induction coil to move up and down in the vertical direction. The inner diameter of the heating induction coil is larger than the outer diameter of the roller sleeve. The heating induction coil is used to heat the outer surface of the roller sleeve. When the surface temperature of the roller sleeve reaches a preset temperature, a temperature difference is formed between the roller sleeve and the roller shaft, causing the roller sleeve to separate from the roller shaft. The roller sleeve falls onto the receiving member, which is used to receive the fallen roller sleeve. The top of the first mounting base protrudes from the top of the receiving member. The first mounting base includes a mounting platform, a first leg, a second leg, a third leg, and a fourth leg. The mounting platform has a rectangular cross-sectional shape. The first, second, third, and fourth legs are connected to the four corners of the mounting platform. A first through hole is located at the center of the mounting platform. The four sides of the mounting platform are respectively provided with a first limiting part, a second limiting part, a third limiting part, and a fourth limiting part, which extend vertically and are sequentially connected to form a rectangular frame. A receiving component is located within the rectangular frame. A fifth limiting part is located at the top of the first leg, and the second leg... A sixth limiting part is provided at the top, a seventh limiting part is provided at the top of the third support leg, and an eighth limiting part is provided at the top of the fourth support leg. The height of the fifth, sixth, seventh, and eighth limiting parts in the vertical direction is greater than the height of the installation platform in the vertical direction. The cross-sectional shape of the first through hole is rectangular, and the cross-sectional shape of the receiving part is circular. The outer diameter of the receiving part is greater than or equal to the diagonal of the first through hole. The receiving part has a preset thickness. The cross-sectional shape of the second through hole is circular. The receiving part is stuck in the installation platform and does not fall off. There are two or more receiving parts on the installation platform. The two or more receiving parts buffer the falling roller sleeve. If the uppermost receiving part is damaged, it can be replaced in time. The heat treatment equipment also includes a first height sensor, a second height sensor, and a controller. The first height sensor is used to detect the height of the receiving component in the vertical direction. The first height sensor is connected to the controller and transmits data to the controller. The second height sensor is used to detect the height of the heating induction coil in the vertical direction. The second height sensor is connected to the controller and transmits data to the controller. The controller is connected to and controls the second lifting mechanism. The controller controls the second lifting mechanism based on the height of the receiving component in the vertical direction and the height of the heating induction coil in the vertical direction to prevent the heating induction coil from colliding with the upper center point above and the receiving component below.

2. The heat treatment equipment for separating roller shafts and roller sleeves according to claim 1, characterized in that, The bottom of the first leg is provided with a first support part, which extends horizontally; the bottom of the second leg is provided with a second support part, which extends horizontally; the bottom of the third leg is provided with a third support part, which extends horizontally; and the bottom of the fourth leg is provided with a fourth support part, which extends horizontally.

3. The heat treatment equipment for separating roller shafts and roller sleeves according to claim 1, characterized in that, The thickness of the receiving part is less than the vertical height of the fifth limiting part, the sixth limiting part, the seventh limiting part, and the eighth limiting part.

4. The heat treatment equipment for separating roller shafts and roller sleeves according to claim 1, characterized in that, The diagonal dimension of the mounting platform is larger than the outer diameter of the heating induction coil.

5. A heat treatment method for separating roller shafts and roller sleeves, characterized in that, Using the heat treatment apparatus for separating roller shafts and roller sleeves as described in any one of claims 1 to 4, the process includes the following steps: The light roller is vertically suspended above the lower center point, so that the axis of the light roller is parallel to the vertical direction. The light roller is moved downward in the vertical direction, passing through the heating induction coil. The bottom center of the light roller rests on the lower center point, keeping the axis of the light roller parallel to the vertical direction. The first lifting mechanism drives the upper center point to move downward, and the upper center point rests on the top center of the light roller. The hoisting equipment releases the light roller. The second lifting mechanism drives the heating induction coil to move vertically to a designated position on the roller sleeve of the light roller. The inner wall of the heating induction coil and the outer surface of the roller sleeve of the light roller are at a preset distance. The heating induction coil is turned on with a preset power to heat the outer surface of the roller sleeve of the light roller, creating a temperature difference between the roller sleeve and the roller shaft. The second lifting mechanism drives the heating induction coil to move up and down vertically. When the surface temperature of the roller sleeve reaches the preset temperature, the surface of the roller sleeve is struck with a copper rod, causing the roller sleeve of the light roller to separate from the roller shaft and fall onto the receiving part. The first mounting base limits the roller sleeve that falls onto the receiving part and cools the roller sleeve. The hoisting equipment fixes the roller shaft and keeps the axial direction of the roller shaft parallel to the vertical direction. The first lifting mechanism drives the upper center to move upward. The hoisting equipment lifts the roller shaft upward in the vertical direction, leaving the roller sleeve on the receiving part. The roller shaft and roller sleeve are removed upward in the vertical direction, and the equipment is reset.

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