CN212792404U - Hard alloy combined roller locking device - Google Patents

Abstract

The utility model discloses a hard alloy combination roller locking device, which comprises a roller shaft and a roller ring sleeved outside the roller shaft, wherein the roller ring is at least one, two adjacent sides of the roller ring are provided with a spacer ring, the linear expansion coefficient of the roller shaft is A, the expansion coefficient of the roller ring is B, the roller shaft expansion coefficient A is larger than the expansion coefficient B of the roller ring, the roller shaft and the roller ring are in interference fit through thermal expansion, one end of the roller shaft is provided with a baffle ring for blocking the roller ring, the other end of the roller shaft is provided with a locking nut, the locking nut is in compressed contact with the end surface of the roller ring at the rightmost side, the roller shaft is in threaded connection with the locking nut, the hard alloy combination roller locking device is designed aiming at the defects of the prior device, the number of components of the locking mechanism is reduced as much as possible, and the locking mode has all the advantages of a hydraulic nut and a mechanical, still have the subassembly few, processing is convenient, the advantage that the processing cost is lower, the assembly adopts the cooperation of little clearance, convenient to detach, the practicality is strong.

Description

Hard alloy combined roller locking device

Technical Field

The utility model relates to a mechanical assembly technical field specifically is a carbide combination roll locking device.

Background

The quality factor of a roll, one of the important components of a rolling mill, directly affects the output, product quality and roll consumption costs of a steel mill. At present, the roller used by bar manufacturers is mainly a cast iron roller, the wear resistance of the roller is poor, the service life of a rolling groove is short, the size precision of a product is seriously influenced, and the improvement of the operation rate of a rolling mill is not facilitated. In recent years, hard alloy combined rolls overcoming the defects of cast iron rolls are rapidly popularized and applied. The hard alloy combined roller has the characteristics of simple and practical structure, convenient maintenance and safe and reliable operation, has obvious technical and economic advantages, can improve the product yield, reduce the comprehensive cost and enhance the product competitiveness.

The hard alloy combined roller is formed by precisely combining forged steel roller shafts, hard alloy roller rings, spacer rings, locking mechanisms and other components. From the analysis of the working principle of the hard alloy combined roller, the roller needs to ensure three points in the use process: a. the roll collar keeps enough axial locking force; b. the roll collar is prevented from rotating; c. avoiding axial movement of the roll collar. According to the design concept, the actual production condition is combined, a plurality of assembling modes are developed and designed, and the most common mode is two modes of axial locking and mechanical clamping combination of the hydraulic nut. The hydraulic nut has the characteristics of safe and reliable locking.

The two types of assembly currently in use have the following disadvantages: the hydraulic nut has the defects of large quantity of processing components, high requirement on matching precision, strict requirement on processing equipment, need of special tools during maintenance and roll replacement, difficulty in disassembly and high processing cost, is very complicated in hydraulic disassembly, and even needs to be returned to a manufacturer for disassembly through fixing equipment. Although the machining cost is slightly reduced, the mechanical clamping has the defects of large number of machining components (single component 26) and high positioning precision requirement.

In view of the above problems, a cemented carbide composite roll locking device is now provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a carbide combination roll locking device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a hard alloy combined roller locking device comprises a roller shaft and roller rings sleeved on the outer side of the roller shaft, wherein the number of the roller rings is at least one, two adjacent sides of the roller rings are provided with spacing rings, the linear expansion coefficient of the roller shaft is A, the expansion coefficient of the roller rings is B, the expansion coefficient of the roller shaft is greater than that of the roller rings, the roller shaft and the roller rings are in interference fit through thermal expansion, one end of the roller shaft is provided with a retaining ring for retaining the roller rings, the other end of the roller shaft is provided with a locking nut, the locking nut is in pressing contact with the end face of the roller ring on the rightmost side, and the roller shaft is in threaded connection with the locking nut;

the four-side roller shaft clamping device comprises a transition plate for supporting one end, close to a baffle ring, of a roller shaft, a through hole matched with the end part of the roller shaft is formed in the transition plate, the outer side of a fixing plate is fixedly connected with the bottom of a four-side clamp, the four-side clamp is of a frame structure with a rectangular ring section, the outer side of the four-side clamp is fixedly connected with a fixing support, at least eight telescopic extrusion rods are further arranged on the outer side of the four-side clamp and distributed on four side surfaces of the four-side clamp, and a clamping head used for positioning the roller ring is arranged at the output end of each telescopic extrusion rod;

the sleeve is matched with the outer side of the locking nut so that the hydraulic wrench can operate conveniently, the sleeve is designed to avoid damage to the nut when the hydraulic wrench operates, and the service life of the nut is prolonged.

As a further aspect of the present invention: and the clamping surface of the clamping head is provided with an anti-skid layer.

As a further aspect of the present invention: the anti-skid layer is made of rubber materials.

As a further aspect of the present invention: the lower end of the sleeve is provided with a conical guide port.

As a further aspect of the present invention: the expansion coefficient of the spacer ring is equal to that of the roll shaft.

As a further aspect of the present invention: the locking nut is a twelve-square locking nut.

An operation method of a hard alloy combined roller locking device comprises the following steps:

step 1: heating the spacer ring and assembling the spacer ring with the roller shaft, so that the roller shaft and the spacer ring are in interference fit to form a whole, and then inserting one end of the roller shaft, which is provided with the baffle ring, on the transition plate for preliminary positioning;

step 2: sleeving the roll collar and the spacing ring on the roll shaft in sequence;

and step 3: extruding forces are applied to the surfaces of the roll ring and the spacer ring by utilizing a square clamp, so that the whole roll shaft and accessories are positioned;

and 4, step 4: install lock nut in the screw thread district of roller upper end, then rotatory realization is tentatively locked, again with the sleeve cover on lock nut, operate lock nut through hydraulic wrench at last and realize final locking.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses drawback to current device designs, reduces locking mechanism subassembly quantity as far as possible, and this kind of locking mode still has the subassembly few, the processing is convenient, the advantage that the processing cost is lower except having all advantages of hydraulic nut and mechanical clamping formula combination dual mode. The assembly adopts the cooperation of little clearance, convenient to detach, and the practicality is strong.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the assembly frame platform of the present invention.

Fig. 3 is the main section view of the roller assembly of the present invention.

Fig. 4 is a plan view of the roller assembly of the present invention.

Wherein: the device comprises a fixed support 1, a clamping head 2, a telescopic extrusion rod 3, a transition plate 4, a roll shaft 5, a baffle ring 51, a square clamp 6, a sleeve 7, a roll ring 8, a spacer ring 9, a locking nut 10 and a hydraulic wrench 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, in an embodiment of the present invention, a hard alloy combination roller locking device includes a roller shaft 5 and a roller ring 8 sleeved on an outer side thereof, the number of the roll collars 8 is at least one, two adjacent sides of the roll collars 8 are provided with spacing rings 9, the linear expansion coefficient of the roll shaft 5 is A, the expansion coefficient of the roll collar 8 is B, the expansion coefficient A of the roll shaft 5 is larger than the expansion coefficient B of the roll collar 8, the roll shaft 5 and the roll collar 8 are in small clearance fit at the beginning, and gradually become interference fit through thermal expansion after working, one end of the roll shaft 5 is provided with a baffle ring 51 for blocking the roll ring 8, the other end of the roll shaft 5 is provided with a locking nut 10, the locking nut 10 is a twelve-square locking nut, the locking nut 10 is in compressed contact with the end face of the rightmost roll collar 8, and the roll shaft 5 is in threaded connection with the locking nut 10;

the clamping device comprises a transition plate 4 for supporting one end, close to a baffle ring, of a roller shaft 5, a through hole matched with the end part of the roller shaft 5 is formed in the transition plate 4, the outer side of a fixing plate is fixedly connected with the bottom of a square clamp 6, the square clamp 6 is of a frame structure with a rectangular ring section, the outer side of the square clamp 6 is fixedly connected with a fixing support 1, at least eight telescopic extrusion rods 3 are further arranged on the outer side of the square clamp 6, the eight telescopic extrusion rods 3 are distributed on four side faces of the square clamp 6, a clamping head 2 for positioning the roller ring 8 is arranged at the output end of each telescopic extrusion rod 3, an anti-skid layer is arranged on the clamping face of each clamping head 2, and is made of rubber materials, so that the clamping area can be increased in the clamping process;

the sleeve 7 is matched with the outer side of the locking nut 10 so that the hydraulic wrench 11 can operate conveniently, the sleeve 7 can avoid damage to the nut when the hydraulic wrench 11 operates, and the service life of the nut is prolonged;

when the device is actually used, when the device is at room temperature, the roller ring 8 and the roller shaft 5 are in clearance fit, so that the device is convenient to disassemble and assemble, and after the temperature rises after the device works, because the expansion coefficient B of the roller ring 8 is smaller than the expansion coefficient A of the roller shaft 5, the expansion amplitude of the roller shaft 5(A) is larger than that of the roller ring 8, so that the roller ring 8 and the roller shaft 5 are in interference fit;

the actual locking method is as follows: step 1: after the spacer ring is heated and is in interference fit with the roller shaft, one end of the roller shaft 5, which is provided with the baffle ring 51, is inserted into the transition plate 4 for preliminary positioning;

step 2: at room temperature, the roll collar 8 and the spacer ring 9 are sequentially sleeved on the roll shaft 5;

and step 3: extruding forces are applied to the surfaces of the roll ring 8 and the spacer ring 9 by utilizing the square clamp 6, so that the outer side of the whole roll shaft 5 is positioned;

and 4, step 4: install lock nut 10 in the screw thread district of roller 5 upper end, then rotatory realization preliminary location, overlap sleeve 7 on lock nut 10 again, operate lock nut 10 through hydraulic wrench 11 at last and realize final location.

The utility model discloses a theory of operation is: on the premise of ensuring three-point use requirements of the hard alloy combined roller, the number of locking mechanism components is reduced as much as possible by adopting a subtractive thinking, and the locking mechanism components are converted into a twelve-square large nut mode of single-piece locking. The locking mode has all the advantages of two modes of axial locking of the hydraulic nut and mechanical clamping and clamping combination, and also has the advantages of few components, convenience in processing and lower processing cost. The assembly adopts little clearance fit, convenient to detach, and the collars is tight sliding fit with the roll shaft design, and there is a certain amount of clearance collar and roll shaft under the normal temperature, and after rolling temperature evenly rose, the two different linear expansion coefficient made the clearance reduce, made become transition fit or interference fit between collars and the roll shaft. Therefore, convenience is provided for recycling the roll shaft and the nut for users needing to independently disassemble and assemble.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (4)

1. The hard alloy combined roller locking device is characterized by comprising a roller shaft (5) and roller rings (8) sleeved on the outer side of the roller shaft, wherein the number of the roller rings (8) is at least one, two adjacent sides of the roller rings (8) are provided with spacing rings (9), the linear expansion coefficient of the roller shaft (5) is A, the expansion coefficient of the roller rings (8) is B, the expansion coefficient A of the roller shaft (5) is larger than the expansion coefficient B of the roller rings (8), the roller shaft (5) and the roller rings (8) are in interference fit through thermal expansion, one end of the roller shaft (5) is provided with a baffle ring (51) used for blocking the roller rings (8), the other end of the roller shaft (5) is provided with a locking nut (10), the locking nut (10) is in pressing contact with the end face of the roller ring (8) on the rightmost side, and the roller shaft (5) is in threaded connection with the locking nut (10);

also comprises a transition plate (4) used for supporting one end of the roll shaft (5) close to the fixed ring, the transition plate (4) is provided with a through hole matched with the end part of the roll shaft (5), the outer side of the transition plate is fixedly connected with the bottom of a square clamp (6), the square clamp (6) is of a frame structure with a rectangular ring-shaped section, the outer side of the square fixture (6) is fixedly connected with the fixed support (1), at least eight telescopic extrusion rods (3) are arranged on the outer side of the square fixture (6), the eight telescopic extrusion rods (3) are distributed on four side surfaces of the square fixture (6), a clamping head (2) used for positioning a roll collar (8) is arranged at the output end of each telescopic extrusion rod (3), the clamping surface of the clamping head (2) is provided with an anti-slip layer made of rubber materials, so that the clamping area can be increased in the clamping process;

comprises a sleeve (7) which is matched with the outer side of a locking nut (10) so as to facilitate the operation of a hydraulic wrench (11).

2. Cemented carbide composite roll locking device according to claim 1, characterized in that the sleeve (7) is provided with a conical pilot port at its lower end.

3. Cemented carbide composite roll locking device according to claim 1, characterized in that the expansion coefficient of the spacer ring (9) is equal to the expansion coefficient of the roll shaft.

4. The cemented carbide composite roll locking device according to claim 1, characterized in that the lock nut (10) is a twelve-square lock nut.

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