Quick replacement device for mandrel of large horizontal ring rolling mill
Through the automated locking structure and concentric positioning design, the positioning difficulties and slow locking problems in the replacement of the traditional ring movement mandrel shaft are solved, and the rapid and accurate replacement of the mandrel shaft is achieved, and the accuracy and production efficiency of the ring forgings are improved.
Patent Information
- Application Number
- CN202422324227.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-24
AI Technical Summary
During the replacement of the traditional ring-ring movement shaft, there are problems such as difficulty in positioning, slow locking speed, time-consuming and labor-intensive installation, which leads to the inability to guarantee the dimensional accuracy of the ring forgings, which affects the production cycle and the smooth progress of the plan.
It adopts an automated locking structure, including jaw guide rail, floating plate and motor drive. The automatic locking and loosening of the mandrel is achieved through sliding jaws and support claws, bolt locking is cancelled, and the concentric positioning design of the upper and lower shaft sleeves is adopted to achieve automatic centering and positioning of the mandrel.
It improves the efficiency of mandrel replacement, reduces labor intensity, extends the service life of mandrel, improves the size and shape accuracy of ring forgings, shortens the manufacturing cycle, and reduces manufacturing costs.
Smart Images
Figure CN223114088U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of equipment parts, in particular to a quick replacement device for the mandrel of a large horizontal ring rolling machine. Background Technique
[0002] In the field of industrial manufacturing, especially in the production process of large ring forgings, the ring rolling machine is a key device for realizing the hole expanding rolling of ring forgings. Ring forgings are manufactured at high temperatures, and their dimensional accuracy and shape accuracy are crucial for the performance of the final product.
[0003] As the core component of the equipment, during the high-temperature manufacturing process of ring forgings, the mandrel of the ring rolling machine is in contact with the high-temperature forging blank for a long time and bears a large transverse shear stress, which makes the mandrel prone to deformation and fracture.
[0004] In order to ensure the accuracy of ring forgings, it is necessary to frequently replace the mandrel of the ring rolling machine. However, there are many problems in the traditional process of replacing the mandrel of the ring rolling machine. First of all, the conventional locking mechanism uses manual bolts for fixation, and this design has defects such as difficult positioning, slow locking speed, and time-consuming and laborious installation process in actual operation. Secondly, due to the low efficiency of mandrel replacement, the dimensional accuracy of the ring forgings after ring rolling cannot be guaranteed, which in turn affects the production cycle and the smooth progress of the production plan.
[0005] In order to solve these problems and improve production efficiency and forging quality, there is an urgent need for a new type of mandrel locking mechanism to achieve fast, accurate, and stable mandrel replacement. Content of the Utility Model
[0006] The purpose of the utility model is to provide a quick replacement device for the mandrel of a large horizontal ring rolling machine to solve the problems raised in the above background technique, that is, the conventional locking mechanism uses manual bolts for fixation, and this design has defects such as difficult positioning, slow locking speed, and time-consuming and laborious installation process in actual operation; and due to the low efficiency of mandrel replacement, the dimensional accuracy of the ring forgings after ring rolling cannot be guaranteed, which in turn affects the production cycle and the smooth progress of the production plan.
[0007] To achieve the above purpose, the utility model provides the following technical solution: A quick replacement device for the mandrel of a large horizontal ring rolling machine, including a horizontal lower end cover and a base plate arranged on its top surface. A jaw guide rail is arranged on the top surface of the base plate, and two jaw parts that can slide axially along the guide rail are arranged mirror-symmetrically on the jaw guide rail. A vertical support shaft is arranged on the top surface of the fixed part of each of the two jaw parts, and a floating plate that can move up and down is jointly arranged at the top ends of the two support shafts. A supporting claw is arranged at the center of the bottom surface of the floating plate; circular holes for the upper end of the mandrel to pass through are arranged at the centers of the lower end cover and the base plate.
[0008] Preferably, the lower end cover is disc-shaped and is provided with a circular hole at its axis for the mandrel to pass through. On the top surface of the lower end cover, a plurality of concave bolt holes are evenly distributed on the same circumference near the edge, and a dust cover is fixed with bolts; the dust cover covers the outside of the base plate, the jaw guide rail, the jaw part, the support shaft, and the floating plate.
[0009] Preferably, the base plate is arranged in a circular ring shape coaxial with the lower end cover, and its inner diameter is larger than the inner diameter of the circular hole of the lower end cover. A jaw guide rail with the same center point is arranged on the top surface of the base plate.
[0010] Preferably, the jaw guide rail includes a rectangular guide rail mounting plate. A circular hole coaxial with and having the same inner diameter as the circular hole of the lower end cover is arranged at the center of the guide rail mounting plate. On the top surface of the guide rail mounting plate, two guide rails are symmetrically arranged on both sides of the circular hole, and two jaw parts are mirror-symmetrically arranged on the two guide rails.
[0011] Preferably, the jaw part includes jaw fixing and guiding blocks respectively fixed at both ends of the guide rail of the guide rail mounting plate. Two jaw guide rods extending to the opposite side and parallel to the guide rail are arranged on each jaw fixing and guiding block, and a sliding jaw that can slide along its axial direction is jointly arranged on the two jaw guide rods of the same jaw fixing and guiding block. A clamping spring is sleeved outside the jaw guide rod between the jaw fixing and guiding block and the sliding jaw; on the lower part of the vertical side surfaces of the two sliding jaws close to each other, a groove for accommodating the upper end of the mandrel is jointly arranged, and on the upper part, a V-shaped groove is jointly arranged.
[0012] Preferably, a smooth support shaft is vertically arranged at the center of the top surface of each jaw fixing and guiding block. A smooth guide sleeve is sleeved outside the support shaft, and the guide sleeve is embedded in the floating plate, so that the floating plate can move up and down along the two support shafts. A gland is arranged at the top end of the support shaft, and a disc spring is sleeved outside the support shaft.
[0013] Preferably, the floating plate is connected with a motor driving part, and the motor driving part can drive the floating plate to move downwards and compress the disc spring, and at the same time separate the two sliding jaws through the supporting claws.
[0014] Preferably, the bottom of the supporting claw is V-shaped and convex downward, and can be inserted into the V-shaped groove.
[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0016] 1. The utility model can automatically lock and release the top end of the mandrel; at the same time, a locking groove is processed at the top end of the mandrel to form an automatic locking assembly structure with the sliding jaw, canceling the bolt locking and fixing, and solving the problems of difficult positioning and difficult locking of the threaded hole during the installation of the mandrel.
[0017] 2. Adopt a concentric positioning design structure for the upper and lower bushings. The mandrel is installed in the lower bushing, and its upper end automatically aligns with the upper bushing of the ring rolling machine, achieving automatic positioning through the ring rolling machine, reducing the manual participation in the mandrel installation process, lowering the labor intensity, and improving the installation efficiency.
[0018] 3. The use of the present utility model can greatly improve the mandrel replacement efficiency. In cooperation with the daily spot inspection of the ring rolling machine, it not only improves the service life of the mandrel, reduces the manufacturing cost, but also improves the dimensional accuracy of the in-use mandrel, enhances the dimensional accuracy and shape accuracy of the ring forging rolling, and shortens the manufacturing cycle of the ring forging. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the present utility model;
[0020] Figure 2 is Figure 1 a structural schematic diagram;
[0021] Figure 3 is Figure 2 a sectional view taken along A - A in
[0022] Figure 4 is Figure 2 a sectional view taken along B - B in
[0023] Figure 5 is Figure 2 an enlarged view of C in
[0024] In the figure: lower end cover - 1, base plate - 2, jaw guide rail - 3, guide rail mounting plate - 31, jaw part - 4, jaw fixing and guiding block - 41, jaw guide rod - 42, sliding jaw - 43, clamping spring - 44, V - shaped groove - 45, support shaft - 5, guide sleeve - 51, gland - 52, disc spring - 53, floating plate - 6, support claw - 7, dust cover - 8. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings and specific embodiments.
[0026] Please refer to Figures 1-5 , Figure 1 which is a schematic diagram of the present utility model; Figure 2 is Figure 1 a structural schematic diagram; Figure 3 is Figure 2 a sectional view taken along A - A in Figure 4 is Figure 2 a sectional view taken along B - B in Figure 5 is Figure 2Enlarged view of C.
[0027] The utility model provides a quick replacement device for the mandrel of a large horizontal ring rolling machine, which is used to replace the locking mechanism of the upper shaft sleeve of the ring rolling machine, so as to assist the quick replacement and use of the mandrel of the ring rolling machine; it includes a horizontal lower end cover 1, a base plate 2 is arranged on the top surface of the lower end cover 1, a jaw guide rail 3 is arranged on the top surface of the base plate 2, and two jaw parts 4 that can slide axially along the guide rail are arranged symmetrically on the jaw guide rail 3. A vertical support shaft 5 is arranged on the top surface of the fixed part of each of the two jaw parts 4, and a floating plate 6 that can move up and down is jointly arranged at the top ends of the two support shafts 5. A supporting claw 7 is arranged at the center of the bottom surface of the floating plate 6; in addition, a dust-proof cover 8 is sleeved outside the base plate 2, the jaw guide rail 3, the jaw part 4, the support shaft 5, and the floating plate 6.
[0028] The lower end cover 1 is arranged in a disc shape and has a circular hole for the mandrel to pass through at its axis. A plurality of concave bolt holes are evenly arranged on the same circumference near the edge of the top surface of the lower end cover 1, and the dust-proof cover 8 is fixed with bolts.
[0029] The base plate 2 is arranged in a circular ring shape coaxial with the lower end cover 1, and its inner diameter is larger than the inner diameter of the circular hole of the lower end cover 1. A jaw guide rail 3 with the same center point is arranged on the top surface of the base plate 2.
[0030] The jaw guide rail 3 includes a guide rail mounting plate 31 arranged in a rectangle. A circular hole coaxial with and having the same inner diameter as the circular hole of the lower end cover 1 is arranged at the center of the guide rail mounting plate 31. Two guide rails are symmetrically arranged on both sides of the circular hole on the top surface of the guide rail mounting plate 31, and two jaw parts 4 are arranged symmetrically on the two guide rails.
[0031] The jaw part 4 includes jaw fixed guide blocks 41 respectively fixed at both ends of the guide rail of the guide rail mounting plate 31. Two jaw guide rods 42 extending towards the opposite side and parallel to the guide rail are arranged on each jaw fixed guide block 41. A sliding jaw 43 that can slide axially along them is jointly arranged on the two jaw guide rods 42 on the same jaw fixed guide block 41. A clamping spring 44 is sleeved outside the jaw guide rod 42 between the jaw fixed guide block 41 and the sliding jaw 43; a groove for accommodating the upper end of the mandrel is jointly arranged at the lower part of the vertical side surfaces of the two sliding jaws 43 close to each other, and a V-shaped groove 45 is jointly arranged at the upper part.
[0032] A smooth support shaft 5 is vertically arranged at the center of the top surface of each clamping jaw fixing guide block 41, and a smooth guide sleeve 51 is sleeved on the outer side of the support shaft 5. The guide sleeve 51 is embedded in the floating plate 6, so that the floating plate 6 can be lifted and moved along the two support shafts 5. A pressure cover 52 is arranged on the top end of the support shaft 5, which is used to limit the upper limit of the movement of the floating plate 6; a butterfly spring 53 is also sleeved on the outer side of the support shaft, which is used to assist the resetting of the floating plate 6.
[0033] The floating plate 6 is connected to a motor driving part for driving the floating plate 6 to move downward and compress the butterfly spring 53 , and at the same time separate the two sliding clamping jaws 43 through the supporting claws 7 .
[0034] The bottom of the support claw 7 is V-shaped and convex, which can be inserted into the V-shaped groove 45. As the floating plate 6 gradually moves downward, the two sliding jaws 43 can be separated from each other, so that the upper end of the core shaft can be inserted between the two sliding jaws 43 and locked.
[0035] When in use, the utility model is used to replace the upper sleeve locking mechanism of the original ring rolling machine. When installing the core shaft, the core shaft is moved to the ring rolling machine by a clamping forklift, and the core shaft is erected so that its bottom end is inserted into the lower sleeve of the ring rolling machine; the ring rolling machine controls the utility model to move to a specified height; the floating plate is controlled to descend by a motor, and the butterfly spring floating plate at both ends is compressed to push the support claw to descend, and its front end is embedded in the V-shaped groove on the top of the sliding claw. As the floating plate descends, the two sliding claws are spread open. After the top end of the core shaft is embedded and the force is relieved at the top end, the floating plate automatically rises, driving the support claw to rise, and the two sliding claws automatically lock the top end of the core shaft under the drive of the clamping spring, thereby completing the automatic installation of the core shaft.
[0036] The use of the utility model can automatically lock and loosen the top end of the mandrel; at the same time, a locking groove is processed on the top end of the mandrel to form an automatic locking assembly structure with the sliding clamp, and the bolt locking and fixing is eliminated, thereby solving the problem that the threaded hole is difficult to position and lock when the mandrel is installed; the upper and lower sleeves are designed with concentric positioning, and the mandrel is installed in the lower sleeve, and its upper end is automatically aligned with the upper sleeve of the ring rolling machine, and automatic positioning is achieved through the ring rolling machine, thereby reducing human participation in the mandrel installation process, reducing labor intensity and improving installation efficiency; the use of the utility model can greatly improve the mandrel replacement efficiency, and cooperate with the daily inspection of the ring rolling machine, which not only improves the service life of the mandrel and reduces the manufacturing cost, but also improves the dimensional accuracy of the mandrel in use, improves the dimensional accuracy and shape accuracy of the ring forging rolling, and shortens the manufacturing cycle of the ring forging.
[0037] Although embodiments of the present utility model have been shown and described, it is obvious that the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, those of ordinary skill in the art can understand that all other embodiments obtained by making various changes, modifications, substitutions, and variations to these embodiments without creative efforts, without departing from the principle and spirit of the present utility model, fall within the scope of protection of the present utility model.
Claims
1. A rapid mandrel replacement device for a large horizontal ring rolling machine, characterized in that: It includes a horizontal lower end cover (1) and a base plate (2) provided on its top surface. A jaw guide rail (3) is provided on the top surface of the base plate (2). Two jaw parts (4) that can slide axially along the guide rail are mirror-symmetrically arranged on the jaw guide rail (3). A vertical support shaft (5) is provided on the top surface of the fixed part of each of the two jaw parts (4), and a floating plate (6) that can move up and down is jointly provided at the top ends of the two support shafts (5). A supporting jaw (7) is provided at the center of the bottom surface of the floating plate (6); circular holes for the upper end of the mandrel to pass through are provided at the centers of the lower end cover (1) and the base plate (2).
2. The quick replacement device for the mandrel of a large horizontal ring rolling machine according to claim 1, wherein: The lower end cover (1) is disc-shaped and a circular hole for the mandrel to pass through is provided at its axis. A plurality of concave bolt holes are evenly distributed on the same circumference near the edge on the top surface of the lower end cover (1), and a dust cover (8) is fixed with bolts; the dust cover (8) covers the outside of the base plate (2), the jaw guide rail (3), the jaw parts (4), the support shaft (5), and the floating plate (6).
3. The quick replacement device for the mandrel of a large horizontal ring rolling machine according to claim 2, wherein: The base plate (2) is circular-ring-shaped and coaxial with the lower end cover (1), and its inner diameter is larger than the inner diameter of the circular hole of the lower end cover (1). A jaw guide rail (3) with the same center point is provided on the top surface of the base plate (2).
4. The quick replacement device for the mandrel of a large horizontal ring rolling machine according to claim 3, characterized in that: The jaw guide rail (3) includes a rectangular guide rail mounting plate (31). A circular hole coaxial with and having the same inner diameter as the circular hole of the lower end cover (1) is provided at the center of the guide rail mounting plate (31). Two guide rails are symmetrically arranged on both sides of the circular hole on the top surface of the guide rail mounting plate (31), and two jaw parts (4) are mirror-symmetrically arranged on the two guide rails.
5. The quick replacement device for the mandrel of a large horizontal ring rolling machine according to claim 4, wherein: The jaw part (4) includes jaw fixed guiding blocks (41) respectively fixed at both ends of the guide rail of the guide rail mounting plate (31). Two jaw guide rods (42) extending to the opposite side and parallel to the guide rail are provided on each jaw fixed guiding block (41). A sliding jaw (43) that can slide axially along it is jointly provided on the two jaw guide rods (42) of the same jaw fixed guiding block (41). A clamping spring (44) is sleeved outside the jaw guide rod (42) between the jaw fixed guiding block (41) and the sliding jaw (43); a groove for accommodating the upper end of the mandrel is jointly provided at the lower part of the vertical side surfaces of the two sliding jaws (43) close to each other, and a V-shaped groove (45) is jointly provided at the upper part.
6. The quick replacement device for the mandrel of a large horizontal ring rolling machine according to claim 5, characterized in that: A smooth support shaft (5) is vertically provided at the center of the top surface of each jaw fixed guiding block (41). A smooth guide sleeve (51) is sleeved outside the support shaft (5). The guide sleeve (51) is embedded in the floating plate (6), so that the floating plate (6) can move up and down along the two support shafts (5). A gland (52) is provided at the top end of the support shaft (5), and a disc spring (53) is sleeved outside the support shaft.
7. The quick replacement device for the mandrel of a large horizontal ring rolling machine according to claim 6, characterized in that: The floating plate (6) is connected with a motor driving part. The motor driving part can drive the floating plate (6) to move downwards and compress the disc spring (53), and at the same time separate the two sliding jaws (43) through the supporting jaw (7).
8. The quick replacement device for the mandrel of a large horizontal ring rolling machine according to claim 7, characterized in that: The bottom of the supporting claw (7) is provided with a downward convex V shape and can be inserted into the V-shaped groove (45).