Hard alloy composite roller

Abstract

The utility model relates to the technical field of hard alloy composite rollers, in particular to a hard alloy composite roller. The utility model discloses a hard alloy composite roll which comprises a roll shaft, a shaft shoulder arranged at one axial end of the roll shaft and a locking nut arranged at the other axial end of the roll shaft and detachably connected with the roll shaft, and roll rings and spacer rings which are sequentially and alternately arranged are arranged at the position, between the shaft shoulder and the locking nut, of the roll shaft in a sleeved mode. A thrust mechanism is arranged in the shaft shoulder, the thrust mechanism can push the roll rings to slide axially and tightly abut against the roll rings between the shaft shoulder and the locking nut, and a supporting and tightening piece is arranged between the shaft shoulder and the adjacent roll rings. The tight supporting piece is used for filling the thrust mechanism so that a gap can be formed between the shaft shoulder and the roller ring. The roller ring has the advantage of being capable of preventing the roller ring from slipping.

Description

TECHNICAL FIELD

[0001] The utility model relates to hard alloy composite roll technical field, concretely is a kind of hard alloy composite roll. BACKGROUND

[0002] Chinese patent application with application number 201710681490.X discloses a kind of hard alloy composite roll, including mandrel, spacer ring and roll ring, mandrel includes fixed end and lock end, fixed end is equipped with step to block roll ring, roll ring and spacer ring are alternately set on mandrel, first inclined plane that is equipped with with roll ring end surface cooperation is on step, two end faces of roll ring are second inclined plane, two end faces of spacer ring are third inclined plane, the included angle of first inclined plane, second inclined plane and third inclined plane with shaft section all equal, lock end of mandrel is equipped with lock nut for locking spacer ring and roll ring on mandrel.

[0003] In the above technical scheme, by alternately setting hard alloy roll ring and spacer ring, then through the way of axial pressure of lock nut, provide the acting force along the roll shaft axial direction for hard alloy roll ring, aim at the cooperation of lock nut and shaft shoulder to press roll ring, however, only rely on the limiting mode of lock nut, since fastening nut cannot bear enough high pressure, so its pre-tightening force is also limited, lead to being unable to limit roll ring and spacer ring and make roll ring and spacer ring fixed, once lock nut loosens, lead to roll ring skidding, affect the rolling effect of hard alloy composite roll. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of hard alloy composite roll that can guarantee the pre-tightening force provided by lock nut to prevent roll ring skidding.

[0005] To achieve the above object, the utility model discloses a kind of hard alloy composite roll, including roll shaft, the shaft shoulder of being arranged in one end of roll shaft axial direction and the lock nut of being arranged in the other end of roll shaft axial direction and being detachably connected with roll shaft, the roll shaft is set with the roll ring and spacer ring that are alternately arranged in succession between the position of shaft shoulder and the lock nut, the shaft shoulder is provided with thrust mechanism, the thrust mechanism can push the roll ring and make the roll ring be tightly pressed between the shaft shoulder and the lock nut, the shaft shoulder and the roll ring between adjacent are equipped with bracing piece, the bracing piece is used to fill the gap generated between the shaft shoulder and the roll ring by thrust mechanism.

[0006] When needing to fix roll ring, roll ring and spacer ring are alternately set on the outer circular surface of roll shaft in proper order, and roll ring is clamped by the cooperation of spacer ring and shaft shoulder, spacer ring and spacer ring and bracing piece and spacer ring, the thrust mechanism in the shaft shoulder is elongated under the action of oil pressure, and the roll ring is fixed by the cooperation of spacer ring, shaft shoulder and bracing piece.

[0007] The utility model discloses a mode that is provided with the thrust mechanism that can extend under the action of oil pressure, provides axial force, effectively tightens the roll ring between the shaft shoulder and lock nut, and improves the pre-tightening force provided by the lock nut, and after the pressure relief of the thrust mechanism, the straining piece is matched, so that it is filled in the gap between the shaft shoulder and the roll ring, and the stability of the roll ring and the spacer ring after fixing is further ensured.

[0008] The thickness of the straining piece is processed after the processing, and the straining piece is assembled into the gap in the form of interference fit.

[0009] Preferably, the roll ring comprises a first roll ring for abutting against the shaft shoulder or the lock nut and a second roll ring located between two adjacent spacer rings, the first roll ring is flat near the axial end of the shaft shoulder or the lock nut, the axial end of the first roll ring away from the shaft shoulder or the lock nut is beveled, and the axial ends of the second roll ring are beveled.

[0010] The contact end of the roll ring and the spacer ring matched with the roll ring is beveled, so that the roll ring and the spacer ring on the roll shaft form a whole, and when the single-piece roll ring has a tendency to slip, the left and right adjacent spacer rings also have a corresponding movement tendency under the guidance of the bevel, forming a chain reaction, thereby increasing the resistance of the single-piece roll ring to slip to prevent slipping.

[0011] Preferably, the axial two ends of the second roll ring are symmetrically arranged with the center of the cross section.

[0012] Compared with the roll ring with a longitudinal cross section in the form of a parallelogram, the symmetrically arranged bevels gradually increase the thickness of the second roll ring from one radial side to the other, thereby making the longitudinal cross section of the second roll ring in the form of a single complete trapezoid, so that the center of gravity of the second roll ring is near the axial thickness of the roll ring during the working process, thereby generating centrifugal force when the composite roll rotates at high speed, thereby increasing the rolling force, and further meeting the requirements of low-temperature rolling.

[0013] Preferably, the thrust mechanism comprises an oil inlet channel arranged in the shaft shoulder, a piston cavity communicated with the oil inlet channel and arranged along the circumferential direction of the roll ring, and a thrust ring arranged between the roll ring and the shaft shoulder and capable of axially sliding on the roll shaft, the piston cavity is provided with a piston capable of moving along the axial direction of the roll ring relative to the inner wall of the piston cavity, one end of the piston abuts against the thrust ring, and the other end of the piston is connected with the oil inlet channel, when the oil inlet channel is pressurized and injected, the piston can push the thrust ring to move along the axial direction of the roll shaft under the action of oil pressure.

[0014] When the piston is pressed, the piston is moved away from the piston cavity under the action of hydraulic pressure, and then pushes the thrust ring to move along the axial direction of the roller shaft, so that the roller ring is pressed by the thrust ring, and the roller ring and the spacer ring between the shaft shoulder and the thrust ring are fixed.

[0015] Preferably, the outer wall of the piston is provided with an annular groove, a stop ring and a sealing ring are sleeved in the annular groove, the stop ring is arranged on the side of the sealing ring close to the roller ring, and the sealing ring is used for sealing between the outer wall of the piston and the inner wall of the piston cavity.

[0016] The diameter of the sealing ring is smaller than the scrap diameter of the roller ring of the carbide composite roller, and the sealing ring is used for guaranteeing the sealing performance between the piston and the inner wall of the piston cavity; and the stop ring is used for preventing the sealing ring from being deformed when the piston moves.

[0017] Preferably, the tensioning piece is two semicircular force rings with the same shape, and the two force rings form a whole circular ring structure after being assembled on the roller shaft.

[0018] The force ring is assembled in the gap between the shaft shoulder and the roller ring to fill the gap between the shaft shoulder and the roller ring, prevent the roller ring from retreating along the axial direction of the roller shaft, and thus maintain the pre-tightening force provided by the lock nut.

[0019] Preferably, plane chamfers are arranged between the axial two end faces and the inner circumferential face of the force ring, and thus the two force rings are assembled in the gap between the shaft shoulder and the roller ring.

[0020] Preferably, arc chamfers are arranged between the axial two end faces and the inner circumferential face of the roller ring, and thus the cutting stress generated on the roller shaft in the rolling process of the roller ring is reduced, and the anti-fracture effect of the roller shaft is improved.

[0021] Preferably, sealing rings are embedded in the axial two end faces of the spacer ring, and the sealing rings are close to the middle positions of the ring faces of the spacer ring, and thus the entry of high-pressure water in the rolling process of the roller ring is blocked.

[0022] The roller ring can be effectively clamped between the shaft shoulder and the lock nut, the pre-tightening force provided by the lock nut is improved, the stability of the roller ring and the spacer ring after being fixed is further ensured, and the roller ring can be prevented from slipping. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A structural schematic view of the utility model.

[0024] Figure 2 A Figure 1 An enlarged view of A in FIG. 4.

[0025] Figure 3 A structural schematic view of the tensioning piece of the utility model.

[0026] In the diagram: 11. Roller shaft; 12. Shoulder; 13. Locking nut; 14. Roller ring; 141. Chamfered surface; 15. Spacer ring; 151. Sealing ring; 16. Oil inlet channel; 17. Piston chamber; 18. Piston; 19. Sealing ring; 20. Retaining ring; 21. Thrust ring; 22. Force-bearing ring; 221. Flat chamfer. Detailed Implementation

[0027] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0028] Depend on Figure 1 As shown, this embodiment discloses a cemented carbide composite roller, including a roller shaft 11, a shoulder 12 located at one axial end of the roller shaft 11, and a locking nut 13 located at the other axial end of the roller shaft 11 and detachably connected to the roller shaft 11. A roller ring 14 and a spacer ring 15 are alternately arranged in sequence on the roller shaft 11 between the shoulder 12 and the locking nut. Both axial end faces of the roller ring 14 have arc-shaped chamfers 141 between them and the inner circumferential surface, thereby preventing stress concentration on the outer circumferential surface of the roller shaft, which could lead to roller shaft breakage during use. The roller ring 14 covers... It includes two first roller rings for abutting against the shoulder 12 or the locking nut 13 and several second roller rings located between two adjacent spacer rings 15. The axial end of the first roller ring near the shoulder 12 or the locking nut 13 is a flat surface, and the axial end of the first roller ring away from the shoulder 12 or the locking nut 13 is an inclined surface. Both axial ends of the second roller ring are inclined surfaces. The inclined surfaces at both axial ends of the second roller ring are symmetrically arranged with the cross-section as the center plane. The sealing rings 151 are embedded in the axial ends of the spacer rings 15, and the sealing rings 151 are located near the middle of the ring surface of the spacer rings 15.

[0029] The length difference h between the maximum and minimum axial length of the first roll ring is 1.51 mm, resulting in an angle θ1 of 89°40′ between the inclined surface of the first roll ring and the maximum axial length on the circumferential surface. The tolerance of angle θ1 is ±6′. The angle θ2 between the inclined surface of the first roll ring and the minimum axial length on the circumferential surface is complementary to angle θ1. The inclination angle of the inclined surface at both ends of the second roll ring is the same as that of the inclined surface of the first roll ring. This prevents the inclination angle of the inclined surface from being too large, which would affect the edge wall thickness support effect of the annular groove used for rolling the roll ring 14, or even cause the roll ring 14 to break or chip. Alternatively, if the inclination angle of the inclined surface is too small, the overall locking effect of the roll ring 14 and the spacer ring 15 would be reduced, thereby increasing the risk of the roll ring 14 slipping.

[0030] When a single roller ring 14 shows a tendency to slip, the chain slipping tendency guided by its inclination will be immediately resisted by the locking force of the adjacent roller ring 14, the spacer ring 15 and the locking nut 13. This allows the inclined surface at the end of the roller ring 14 that contacts the spacer ring 15 to intervene when the single roller ring 14 slips, thus achieving overall linkage and preventing the roller ring 14 from slipping.

[0031] As shown in Figure 2 , the shaft shoulder 12 is provided with a thrust mechanism capable of pushing the roller ring 14 to slide axially and pressing the roller ring 14 between the shaft shoulder 12 and the lock nut 13, the thrust mechanism comprises an oil inlet channel 16 arranged in the shaft shoulder 12, a piston cavity 17 communicated with the oil inlet channel 16 and arranged along the circumferential direction of the roller ring 14, and a thrust ring 21 arranged between the roller ring 14 and the shaft shoulder 12 and capable of sliding axially on the roller shaft 11, the piston cavity 17 is provided with a piston 18 capable of moving axially along the roller ring 14 relative to the inner wall of the piston cavity 17, one end of the piston 18 abuts against the thrust ring 21 and the area of the end face in contact with the thrust ring 21 is smaller than the area of the axial end face of the thrust ring 21, the other end of the piston 18 is communicated with the oil inlet channel 16, and the outer wall of the piston 18 is provided with an annular groove, the annular groove is sleeved with a check ring 20 and a sealing ring 19, the check ring 20 is arranged on the side of the sealing ring 19 close to the roller ring 14, and the sealing ring 19 is used to seal between the outer wall of the piston 18 and the inner wall of the piston cavity 17, when the oil in the oil inlet channel 16 is pressurized and injected, the piston 18 can push the thrust ring 21 to move axially along the roller shaft 11 under the action of oil pressure.

[0032] The shaft shoulder 12 and the adjacent roller ring 14 are provided with a straining member, which is two semicircular force rings 22 of the same shape, and after the two force rings 22 are assembled on the roller shaft 11, an integral circular ring structure is formed, and the two force rings 22 are used to fill the gap between the shaft shoulder 12 and the roller ring 14.

[0033] As shown in Figure 3 , the axial end faces and the inner circumferential faces of the force ring 22 are both provided with flat chamfers 221, which facilitates the assembly of the force ring 22 in the gap between the shaft shoulder 12 and the roller ring 14, and the outer diameter of the force ring 22 is the same as that of the roller ring 14.

[0034] When it is necessary to fix the roller ring 14, the roller ring 14 and the spacer ring 15 are alternately sleeved on the outer circumferential face of the roller shaft 11 in sequence, and the roller ring 14 is clamped in cooperation with the shaft shoulder 12 through the spacer ring 15, the spacer ring 15 through the spacer ring 15, and the force ring 22 through the spacer ring 15, after the sleeving is completed, the piston 18 in the shaft shoulder 12 moves away from the piston cavity 17 under the action of hydraulic pressure, thereby pushing the thrust ring 21, so as to press the roller ring 14 by the thrust ring 21, thereby reducing the gap between the roller ring 14, the spacer ring 15 and the lock nut 13, and increasing the pre-tightening force of the lock nut 13, at this time, the two symmetrical force rings 22 that have been machined are assembled into the gap between the shaft shoulder 12 and the roller ring 14 from the two axial sides by interference fit, so as to ensure that the roller ring 14 is fixed by the pressing force of the roller ring 14 after pressure relief, thereby preventing the roller ring 14 from slipping.

Claims

1. A cemented carbide composite roll comprising a roll shaft, a shaft shoulder arranged at one end of the roll shaft in the axial direction, and a locking nut arranged at the other end of the roll shaft in the axial direction and detachably connected with the roll shaft, a roll ring and a spacer ring being arranged alternately in sequence at a position between the shaft shoulder and the locking nut of the roll shaft, characterized in that: The shaft shoulder is internally provided with a thrust mechanism capable of pushing the roller ring to axially slide and tightly abutting the roller ring between the shaft shoulder and the locking nut, and a straining member is arranged between the shaft shoulder and the adjacent roller ring, which is used to fill the thrust mechanism to generate a gap between the shaft shoulder and the roller ring.

2. A cemented carbide composite roll according to claim 1, characterized in that: The roller ring comprises a first roller ring used to abut the shaft shoulder or the locking nut and a second roller ring located between two adjacent spacer rings, the first roller ring is flat at the axial end close to the shaft shoulder or the locking nut, and is inclined at the axial end away from the shaft shoulder or the locking nut, and the axial ends of the second roller ring are both inclined.

3. A cemented carbide composite roll according to claim 2, characterized in that: The axial end inclined surfaces of the second roller ring are arranged in a center-symmetrical manner in the cross section.

4. A cemented carbide composite roll according to claim 1 or 2 or 3, characterized in that: The thrust mechanism comprises an oil inlet channel arranged in the shaft shoulder, a piston cavity communicated with the oil inlet channel and arranged along the circumferential direction of the roller ring, and a thrust ring arranged between the roller ring and the shaft shoulder and capable of axially sliding on the roller shaft, the piston cavity is internally provided with a piston capable of moving along the axial direction of the roller ring relative to the inner wall of the piston cavity, one end of the piston abuts the thrust ring, and the other end of the piston is connected with the oil inlet channel, when pressurized oil injection is performed in the oil inlet channel, the piston can push the thrust ring to axially move along the roller shaft under the action of oil pressure.

5. A cemented carbide composite roll according to claim 4, characterized in that: The outer wall of the piston is provided with an annular groove, a stop ring and a sealing ring are sleeved in the annular groove, the stop ring is arranged on the side of the sealing ring close to the roller ring, and the sealing ring is used to seal between the outer wall of the piston and the inner wall of the piston cavity.

6. A cemented carbide composite roll according to claim 1, characterized in that: The straining member is two semicircular force rings with the same shape, and the two force rings form a complete circular ring structure when assembled on the roller shaft.

7. A cemented carbide composite roll according to claim 6, characterized in that: Plane chamfers are arranged between the axial end faces and the inner circumferential faces of the force rings.

8. A carbide composite roll according to claim 1, characterized in that: Arc chamfers are arranged between the axial end faces and the inner circumferential faces of the roller ring.

9. A carbide composite roll according to claim 1, characterized in that: Sealing rings are embedded in the axial end faces of the spacer rings, and the sealing rings are close to the middle positions of the ring faces of the spacer rings.

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