Hot planting type composite roller and manufacturing method thereof

Abstract

The invention relates to the technical field of rollers, in particular to a hot planting type composite roller and a dismounting and mounting method thereof. The invention discloses a hot planting type composite roller which comprises a roller shaft, a roller shoulder arranged at one axial end of the roller shaft and a limiting piece arranged at the other axial end of the roller shaft and detachably connected with the roller shaft, and the position, between the roller shoulder and the limiting piece, of the roller shaft is sleeved with roller rings and spacer rings which are sequentially and alternately arranged. A limiting part is arranged on the roller shaft, a displacement part capable of axially sliding on the roller shaft is arranged between the roller ring and the limiting part, a supporting part is arranged between the displacement part and the limiting part, a tight supporting mechanism is arranged on the displacement part, and the tight supporting mechanism can push the displacement part to axially slide and tightly support the roller ring between the shaft shoulder and the displacement part. The device has the advantage that the stability and the reliability of the whole structure can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of rollers, in particular to a hot-implanted composite roller and a manufacturing method thereof. Background Art

[0002] The Chinese patent application number 201710801251.3 discloses a cemented carbide composite roller, including a roller shaft, a cemented carbide roller ring, a locking nut and a fastening nut. The cemented carbide roller ring is sleeved on the roller shaft, and a shoulder is provided at one end of the roller shaft. A piston is provided between the cemented carbide roller ring and the shoulder. An oil injection cavity is formed between the piston and the end face of the shoulder. An oil injection hole is provided along the axial direction on the shoulder, and the oil injection hole is connected to the oil injection cavity. When hydraulic oil is injected into the oil injection cavity through the oil injection hole, the oil pushes the piston toward the fastening nut. After sufficient pressure is applied, the oil injection hole is closed to ensure that the roller ring has sufficient preload.

[0003] In the above technical scheme, by alternately arranging the carbide roller rings and the pistons, pressurizing the oil filling chamber and fixing the position of the piston by the locking nut, a force is provided to the carbide roller rings along the axis of the roller shaft, aiming to compress the roller rings through the cooperation of the piston and the shaft shoulder and maintain continuous pressure on their surfaces. However, the method of increasing the preload force of the locking nut by oil pressure in the above technical scheme is extremely dependent on the roller shaft temperature and the stability of the oil pressure in the oil filling chamber. Once the temperature on the roller shaft changes (that is, the locking nut expands due to heat) or the oil leaks, the oil pressure will decrease and the piston will not be able to be provided with a force. In the subsequent use of the composite roller, the roller ring may spin, so the locking nut still has the risk of loosening. Once the locking nut is loose, it cannot provide a force to the roller ring, thereby affecting the overall working performance and stability of the composite roller. Summary of the invention

[0004] The object of the present invention is to provide a method for manufacturing a hot-implanted composite roller capable of effectively ensuring its own pre-tightening force and a composite roller using the manufacturing method.

[0005] To achieve the above-mentioned purpose, the present invention discloses a hot-implanted composite roller, comprising a roller shaft, a roller shoulder arranged at one axial end of the roller shaft, and a limit member arranged at the other axial end of the roller shaft and detachably connected to the roller shaft, the roller shaft is provided with roller rings and spacer rings alternately arranged in sequence at a position between the shaft shoulder and the limit member, a displacement member capable of axially sliding on the roller shaft is provided between the roller ring and the limit member, a support member is provided between the displacement member and the limit member, a tightening mechanism is provided on the displacement member, and the tightening mechanism can push the displacement member to slide axially and tighten the roller ring between the shaft shoulder and the displacement member.

[0006] When the roller ring needs to be fixed, the spacer ring and the roller ring are alternately sleeved on the outer cylindrical surface of the roller shaft in turn, and the roller ring is clamped by the cooperation of the spacer ring and the spacer ring, and the displacement member and the spacer ring. When the sleeve is completed, the contact area between the spacer ring and the roller ring is the surface area of ​​the roller ring close to the spacer ring. The tensioning mechanism on the displacement member stretches under the action of oil pressure and squeezes the roller ring along the axis of the roller shaft, thereby fixing the roller ring and the spacer ring between the shaft shoulder and the displacement member, and then maintaining the distance between the limit member and the displacement member through the support member, so that it can provide a force even when the tensioning mechanism is depressurized, thereby fixing the roller ring and the spacer ring between the shaft shoulder and the displacement member.

[0007] The supporting members may be a plurality of workpieces that can be used to resist the pressure between the displacement member and the spacer ring, such as gaskets with a rectangular or semi-circular cross section.

[0008] The present invention adopts a design in which spacer rings and roller rings are alternately sleeved, and a tightening mechanism on the displacement member drives the displacement member to extrude the spacer rings and roller rings arranged along the axial direction of the roller shaft, and a support member is used to limit the gap between the limit member and the displacement member. This reduces the dependence on a single component (such as a locking nut), thereby reducing the risk of performance degradation of the entire structure due to failure of a single component (such as oil pressure fluctuations, loosening of the locking nut, or thermal expansion and contraction). Even if the oil pressure is temporarily reduced or disappears, the support member enables the spacing maintenance mechanism between the limit member and the displacement member to continue to provide a stable force, so that the roller ring and spacer ring located between the shaft shoulder and the displacement member remain fixed, thereby improving the stability and reliability of the structure.

[0009] Preferably, the limit member is threadedly connected to the roller shaft. When the limit member is pre-installed, the base circle of the inner circle thread of the limit member is smaller than the base circle of the thread on the roller shaft. When the limit member is assembled, the base circle of its inner circle thread can be adapted to the base circle of the thread on the roller shaft by heating and expansion.

[0010] Compared with the limit parts with normal matching threads, they need to be heated to expand their size before they can be assembled. However, after assembly, as the temperature of the limit parts drops, the limit parts shrink, and the threads of the limit parts and the threads of the roller shaft have an interference fit, thereby increasing the connection force between the limit parts and the roller shaft and reducing the possibility of rotation.

[0011] Preferably, the limiting member extends toward one side of the displacement member to have a step for the supporting member to be embedded in.

[0012] The support member is assembled between the limiting member and the displacement member, thereby reducing the risk of the displacement member losing its force along the roller axis direction and causing itself to loosen.

[0013] Preferably, the support member is provided with an avoidance groove for facilitating the radial movement of the support member along the roller shaft.

[0014] The avoidance groove is an open groove which opens toward one side of the roller shaft, and the avoidance groove prevents the support member from being stuck by the tightening mechanism during the process of being located between the displacement member and the limiting member and moving toward the roller shaft.

[0015] Preferably, the outer diameter of the support member along the axial cross section is smaller than the outer diameters of the displacement member and the limit member along the axial cross section.

[0016] By setting the outer surface of the support member to be retracted into the gap between the displacement member and the stopper, a stable hidden protection structure is formed. This not only reduces the volume of the support member directly exposed to the external environment, but also effectively prevents the risk of the support member falling off or being damaged due to external forces such as collision and impact during use, processing or transportation by tightly wrapping the surrounding parts, thereby significantly enhancing the stability and durability of the entire structure.

[0017] Preferably, the tightening mechanism includes an oil inlet channel arranged in the displacement member and a piston chamber connected to the oil inlet channel and arranged axially along the roller ring. The piston chamber is provided with a piston which can move axially along the roller ring relative to the inner wall of the piston chamber. One end of the piston is abutted against the displacement member, and the other end of the piston is connected to the oil inlet channel. The outer wall of the piston is provided with an annular groove, and a sealing ring is sleeved in the groove to seal between the outer wall of the piston and the inner wall of the piston chamber. When oil is pressurized into the oil inlet channel, the piston can push the displacement member to move axially under the action of the oil pressure.

[0018] When pressing, the piston moves away from the piston cavity under the action of hydraulic pressure, and then uses the reaction force to push the displacement member to move along the axial direction of the roller shaft, so that the roller ring is squeezed toward the shoulder side by the displacement member, so that the roller ring and the spacer ring between the shoulder and the displacement member are fixed.

[0019] Preferably, the side wall of the limiting member is provided with a force application hole or a force application groove for applying a circumferential force to the limiting member.

[0020] The force hole or force groove is used in conjunction with the latch. When the limit piece and the roller are assembled, the latch is used to rotate the limit piece and lock the limit piece and the roller shaft, thereby increasing the force arm during the rotation of the limit piece. Compared with the method of directly rotating the limit piece manually, the locking effect between the limit piece and the roller shaft can be improved.

[0021] A method for manufacturing a hot-planted composite roller, characterized by comprising the following steps: S1, heating the roller ring for 2-3 hours to 180-200 degrees, heating the spacer ring for 1-2 hours to 180-200 degrees, and after the heating is completed, sequentially installing the roller ring and the spacer ring on the roller shaft; S2, sleeve the sealing ring onto the piston, install the piston with the sealing ring into the piston cavity, and sleeve the displacement member with the piston onto the roller shaft; S3, heating the limiter for 1-2 hours until the temperature reaches 180-200 degrees, installing the heated limiter into the thread of the roller shaft, and tightening the limiter; S4, by pressing into the tightening mechanism, the displacement member moves along the roller axis away from the limiting member, and the displacement member makes the roller rings fit together, and the roller rings fit together with the spacer rings; S5, processing the support member according to the distance between the position-limiting member and the displacement member, and installing the support member between the position-limiting member and the displacement member after the processing is completed; S6. Release the pressure on the tightening mechanism.

[0022] Preferably, in step S5, the support member having an axial length greater than the axial spacing between the limit member and the displacement member is first processed, and then the support member is shrunk by liquid nitrogen, and then installed between the limit member and the displacement member, so that after the temperature of the installed support member is restored, the force generated by the interference fit forms a pulling force with the force of the piston and the thread, thereby achieving the effect that the locking force of the limit member remains unchanged when the support member does not fall out.

[0023] The principle of heating by induction coil is that the heating effect is poor for objects far away from the coil. When the induction coil is used, the roller ring is outside and close to the coil, and the heating efficiency is faster than the heating efficiency of the roller shaft, so the roller ring and the shaft change from interference to clearance, and because the heat transfer between the two is slow, the heat of the roller ring is not transferred to the roller shaft, thus achieving disassembly.

[0024] S11, heating the roller ring for 2-3 hours to 180-200 degrees, heating the spacer ring for 1-2 hours to 180-200 degrees, and after the heating is completed, sequentially installing the roller ring and the spacer ring on the roller shaft; S12, sleeve the sealing ring onto the piston, install the piston with the sealing ring into the piston cavity, and sleeve the displacement member with the piston onto the roller shaft; S13, heating the limiting member for 1-2 hours until the temperature reaches 180-200 degrees, and threading the heated limiting member with the roller shaft; S14, by pressing the piston cavity, the displacement member moves along the roller axis away from the limit member, the displacement member makes the roller rings fit together, and the roller rings fit together with the spacer rings, and continues to press according to the outer circle size of the roller ring until the pre-designed preload force of the limit member is reached, and the pressure is maintained; S15, processing the support member according to the axial distance between the limit member and the displacement member, and installing the support member between the limit member and the displacement member after the processing is completed; S16, releasing the pressure in the piston cavity to complete the installation.

[0025] The present invention reduces the reliance on a single component (such as a locking nut), thereby reducing the risk of performance degradation of the entire structure due to failure of a single component (such as oil pressure fluctuations, loosening of the locking nut, or thermal expansion and contraction), and has the advantage of improving the stability and reliability of the entire structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A structural schematic diagram of the present invention.

[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0028] Figure 3 A schematic structural diagram of the displacement meter of the present invention.

[0029] Figure 4 It is a schematic diagram of the disassembly process of the present invention.

[0030] In the figure: 11, roller shaft; 12, roller ring; 13, spacer ring; 14, push ring; 15, locking nut; 16, force hole; 20, oil inlet channel; 21, piston chamber; 22, piston; 23, sealing ring; 30, gasket; 31, avoidance groove; 32, anti-collision port; 40, induction coil. DETAILED DESCRIPTION

[0031] The present invention will be further described below based on the accompanying drawings and specific embodiments.

[0032] Depend on Figure 1 As shown, this embodiment discloses a hot-implanted composite roller, including a roller shaft 11, a roller shoulder arranged at one axial end of the roller shaft 11, and a limiter arranged at the other axial end of the roller shaft 11 and detachably connected to the roller shaft 11, the limiter is a locking nut 15, the locking nut 15 is threadedly connected to the roller shaft 11, the inner circle thread base circle of the locking nut 15 is processed with a size that is ten threads smaller than the thread base circle on the roller shaft 11, the roller shaft 11 is sleeved between the shoulder and the locking nut 15 with a roller ring 12 and a spacer ring 13 arranged alternately in sequence, and a displacement member that can slide axially on the roller shaft 11 is arranged between the roller ring 12 and the locking nut 15, which is composed of Figure 3 As shown, the displacement member is a push ring 14, and the push ring 14 has an extension portion extending to the side away from the roller shaft 11, and the extension portion of the push ring 14 is used to adapt to the diameter of the roller ring 12, and the extension portion of the push ring 14 is provided with an anti-collision opening 32, and the anti-collision opening 32 is used to prevent interference between the oil gun and the outer surface of the push ring 14, and a support member is provided between the push ring 14 and the locking nut 15, and the support member is two semi-annular washers 30, and an avoidance groove 31 is provided in the washer 30 for facilitating the radial movement of the washer 30 along the roller shaft 11, and the outer diameter of the washer 30 along the axial cross section is smaller than the outer diameter of the push ring 14 and the locking nut 15 along the axial cross section, thereby reducing the volume of the washer 30 directly exposed to the external environment, and the locking nut 15 extends to one side of the push ring 14 with a step for the washer 30 to be embedded, and a tightening mechanism is provided on the push ring 14.

[0033] Depend on Figure 2 As shown, the tightening mechanism can push the pushing ring 14 to slide axially and tighten the roller ring 12 between the shaft shoulder and the pushing ring 14. The tightening mechanism includes an oil inlet channel 20 arranged in the pushing ring 14 and a piston 22 cavity 21 connected to the oil inlet channel 20 and arranged axially along the roller ring 12. The piston 22 cavity 21 is provided with a piston 22 that can move axially along the roller ring 12 relative to the inner wall of the piston 22 cavity 21. One end of the piston 22 is against the pushing ring 14, and the other end of the piston 22 is connected to the oil inlet channel 20. The outer wall of the piston 22 is provided with an annular groove, and a sealing ring 23 is sleeved in the groove to seal between the outer wall of the piston 22 and the inner wall of the piston 22 cavity 21. The oil inlet channel 22 includes a connecting section for aligning with the oil gun, an assembling section for assembling with the outer surface thread of the oil gun, an oil circuit for oil inlet, and a steering section for connecting the oil circuit with the piston cavity 21.

[0034] When oil is pressurized and injected into the oil inlet channel 20, the piston 22 pushes the push ring 14 to move axially along the roller shaft 11 through the reaction force under the action of the oil pressure. In the initial state, there is a gap of at least 1 mm between the piston 22 in the piston cavity 21 and the axial end face of the piston cavity 21, which facilitates the oil to enter the piston cavity 21.

[0035] The side wall of the locking nut 15 is provided with a force-applying hole 16 for applying a circumferential force to the locking nut 15. The force-applying hole 16 is used in conjunction with a bolt. The force-applying hole 16 includes an inner section and an outer section and is adapted to the shape of the bolt. The inner diameter of the outer section of the force-applying hole 16 is larger than the inner diameter of the inner section. The inner section of the force-applying hole 16 is a threaded section, and the threaded section of the force-applying hole 16 matches the thread at one end of the bolt. After inserting the threaded section of the bolt into the force-applying hole 16, the locking nut 15 is rotated using the bolt.

[0036] After the locking nut 15 is locked by its own thread, the latch is manually rotated. After the latch is screwed into contact with the roller shaft 11 by its own thread, the latch is continued to be rotated, so that the latch and the roller shaft 11 are abutted, so that the locking nut 15 and the roller shaft 11 are eccentric.

[0037] A method for manufacturing a hot-planted composite roller comprises the following steps: S1. During installation, first place the roller ring 12 in a heating furnace and heat it for 2-3 hours until the temperature reaches 180-200 degrees, then place the spacer ring 13 in a heating furnace and heat it for 1-2 hours until the temperature reaches 180-200 degrees (since the spacer ring 13 is made of steel, the heat transfer and thermal expansion are fast, so first place the roller ring 12 in the heating furnace, heat it for 1 hour, and then place the spacer ring 13 in), after the heating is completed, install the roller ring 12 and the spacer ring 13 on the roller shaft 11 in sequence according to the order of the general assembly drawing; S2, take out the thrust ring 14 and the piston 22, put the sealing ring 23 into the annular groove of the piston 22, and then use a copper rod to gently tap the piston 22 with the sealing ring 23 into the piston cavity 21, and put the thrust ring 14 with the piston 22 on the roller shaft; S3, heat the locking nut 15 in a heating furnace for 1-2 hours until it reaches 180-200 degrees (since the expansion coefficient of steel is 1.2*10 -5 / ℃, set the room temperature to 30°, take the thread of M240 as an example, heat the lock nut 15 to 200 degrees, and the thread size changes to 240*1.2*10 -5 * (200-30), meet the expansion requirement of more than 0.35mm), and install the heated locking nut 15 into the thread of the roller shaft 11, and tighten the limiter; S4, by pressing the piston cavity 21 to 80Mpa and then maintaining the pressure (since the roller ring 12 is cooled and highly shrunk during the pressing process, gaps will appear between the roller rings 12 and the spacer ring 13), so that the thrust ring 14 makes the roller rings 12 and the roller rings 12 and the spacer ring 13 fit tightly, and continue pressing according to the outer diameter of the roller ring 12 until the pre-designed preload of the locking nut 15 is reached, and maintain the pressure; S5. Use a micrometer to measure the gap between the thrust ring 14 and the step of the locking nut 15, and process two semi-circular washers 30 according to the measured data with a size increased by 0.04 mm. After the processing is completed, immerse the washers 30 in liquid nitrogen to shrink the size, and use a copper rod to knock them to embed them between the step of the locking nut 15 and the thrust ring 14; S6. After the gasket 30 returns to normal temperature (i.e., after the thrust ring 14 and the locking nut 15 are fully supported along the axial direction of the roller shaft 11), the tensioning mechanism is depressurized to complete the assembly; S7, when disassembling, Figure 4As shown, the locking nut 15 on the roller shaft 11 is moved to the heating station by a crane, and the locking nut 15 is heated by an induction coil. After the locking nut 15 expands due to the heat, the limit piece is removed in the reverse direction of the thread. S8, remove the gasket 30; S9, remove the thrust ring 14 with the piston 22; S10, heating the roller ring 12 and the spacer ring 13 in sequence through the induction coil, and removing them after they swell.

[0038] When the outer circumference of the roller ring is less than 350mm, the working preload force of the locking nut 15 shall not be less than 1500KN; when the outer circumference of the roller ring is greater than 350mm, the working preload force of the locking nut 15 shall not be less than 1700KN; when the outer circumference of the roller ring is greater than 400mm, the working preload force of the locking nut 15 shall not be less than 2000KN.

Claims

1. A hot-planted composite roller, comprising a roller shaft, a roller shoulder arranged at one end of the roller shaft axial direction, and a stopper arranged at the other end of the roller shaft axial direction and threadedly connected to the roller shaft, wherein the roller shaft is provided with roller rings and spacer rings alternately arranged in sequence between the shaft shoulder and the stopper, characterized in that: A displacement member capable of axially sliding on the roller shaft is provided between the roller ring and the limiting member, a support member is provided between the displacement member and the limiting member, and a tightening mechanism is provided on the displacement member, which can push the displacement member to slide axially and tighten the roller ring between the shaft shoulder and the displacement member.

2. The hot-implant composite roller according to claim 1, characterized in that: The limit member is threadedly connected to the roller shaft. When the limit member is pre-installed, the base circle of the inner circle thread of the limit member is smaller than the base circle of the thread on the roller shaft. When the limit member is assembled, the base circle of the inner circle thread of the limit member can be adapted to the base circle of the thread on the roller shaft by heating and expansion.

3. The hot-implant composite roller according to claim 1, characterized in that: The limiting member extends toward one side of the displacement member to form a step for the supporting member to be embedded in.

4. The heat-implanted composite roller according to claim 3, characterized in that: The support member is provided with an avoidance groove for facilitating the support member to move radially along the roller shaft.

5. A hot-implantation composite roller according to claim 3 or 4, characterized in that: The outer diameter of the support member along the axial cross section is smaller than the outer diameters of the displacement member and the limiting member along the axial cross section.

6. The heat-implanted composite roller according to claim 1, characterized in that: The tightening mechanism includes an oil inlet passage arranged in the displacement member and a piston chamber connected to the oil inlet passage and arranged axially along the roller ring. The piston chamber is provided with a piston that can move axially along the roller ring relative to the inner wall of the piston chamber. One end of the piston is against the displacement member, and the other end of the piston is connected to the oil inlet passage. The outer wall of the piston is provided with an annular groove, and a sealing ring is sleeved in the groove to seal between the outer wall of the piston and the inner wall of the piston chamber. When pressurized oil is injected into the oil inlet passage, the piston can push the displacement member to move axially under the action of the oil pressure.

7. The heat-implanted composite roller according to claim 1, characterized in that: The side wall of the limiting member is provided with a force application hole or a force application groove which is convenient for applying a circumferential force to the limiting member.

8. A method for manufacturing a hot-implant composite roller as claimed in any one of claims 1 to 7, characterized in that The steps include: S1, heating the roller ring for 2-3 hours to 180-200 degrees, heating the spacer ring for 1-2 hours to 180-200 degrees, and after the heating is completed, sequentially installing the roller ring and the spacer ring on the roller shaft; S2, assembling the tensioning mechanism onto the displacement member, and sleeve the displacement member with the tensioning mechanism onto the roller shaft; S3, heating the limiting member for 1-2 hours until the temperature reaches 180-200 degrees, and threading the heated limiting member with the roller shaft; S4, by pressing into the tightening mechanism, the displacement member moves along the roller axis away from the limiting member, the displacement member makes the roller rings fit together, and the roller rings fit together with the spacer rings, and continues to press according to the outer circle size of the roller ring until the pre-designed pre-tightening force of the limiting member is reached, and the pressure is maintained; S5, processing the support member according to the axial distance between the position-limiting member and the displacement member, and installing the support member between the position-limiting member and the displacement member after the processing is completed; S6. Depressurize the tightening mechanism to complete the installation.

9. The method for manufacturing a thermally implantable composite roller according to claim 8, characterized in that In the step S5, the support member having an axial length greater than the axial distance between the limit member and the displacement member is first processed, and then the support member is shrunk by liquid nitrogen, and then installed between the limit member and the displacement member.

10. A method for manufacturing the hot-implant composite roller according to any one of claims 6, characterized in that The steps include: S11, heating the roller ring for 2-3 hours to 180-200 degrees, heating the spacer ring for 1-2 hours to 180-200 degrees, and after the heating is completed, sequentially installing the roller ring and the spacer ring on the roller shaft; S12, sleeve the sealing ring onto the piston, install the piston with the sealing ring into the piston cavity, and sleeve the displacement member with the piston onto the roller shaft; S13, heating the limiting member for 1-2 hours until the temperature reaches 180-200 degrees, and threading the heated limiting member with the roller shaft; S14, by pressing the piston cavity, the displacement member moves along the roller axis away from the limit member, the displacement member makes the roller rings fit together, and the roller rings fit together with the spacer rings, and continues to press according to the outer circle size of the roller ring until the pre-designed preload force of the limit member is reached, and the pressure is maintained; S15, processing the support member according to the distance between the position-limiting member and the displacement member, and installing the support member between the position-limiting member and the displacement member after the processing is completed; S16, releasing the pressure in the piston cavity to complete the installation.

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