CN110935756A - Shaping tool used in manufacturing process of ultra-large integral ring forging and using method - Google Patents
Shaping tool used in manufacturing process of ultra-large integral ring forging and using method Download PDFInfo
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- CN110935756A CN110935756A CN201911118528.8A CN201911118528A CN110935756A CN 110935756 A CN110935756 A CN 110935756A CN 201911118528 A CN201911118528 A CN 201911118528A CN 110935756 A CN110935756 A CN 110935756A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/14—Recontouring
Abstract
The invention belongs to the technical field of manufacturing of large-scale integral ring forgings, and particularly relates to a shaping tool used in the manufacturing process of an ultra-large-scale integral ring forging, and a use method of the tool. The shaping tool comprises an inner support ring piece, wherein a plurality of support rods are arranged on the inner wall of the inner support ring piece, and the other ends of all the support rods are connected with a reinforcing cylinder positioned at the central position of the inner support ring piece; the outer wall of the inner support ring piece is provided with a plurality of support mechanisms, each support mechanism has the same structure, and each support mechanism consists of a support leg, an adjusting cushion block and an arc-shaped rounding block from bottom to top. The shaping tool for the ultra-large integral ring forging provided by the invention has the advantages that the ultra-large ring which is scrapped is shaped to meet the machining size, particularly, the integral carbon steel ring with the length of 10 meters or more than 10 meters can be shaped to the required size, and the huge economic loss is avoided. Meanwhile, the product allowance can be reduced, so that the consumption of raw materials is reduced, and great economic significance is achieved.
Description
Technical Field
The invention belongs to the technical field of manufacturing of large-scale integral ring forgings, and particularly relates to a shaping tool used in the manufacturing process of an ultra-large-scale integral ring forging; still relate to the application method of foretell frock.
Background
The maximum integral forged ring commonly seen at present is 10 meters, and the weight of the large ring piece is generally more than 80 tons. Because the ring piece has large size and weight and the ovality is very difficult to control, once the ring piece is out of tolerance, the blank is scrapped, and huge economic loss is caused. At present, the shaping tool for the oversized ring forging with the length of more than 10 meters is rare, so that the shaping tool suitable for manufacturing the oversized ring forging needs to be invented.
Disclosure of Invention
In order to solve the technical problem, the invention provides a shaping tool used in the manufacturing process of an ultra-large integral ring forging; the invention further provides a using method of the tool.
The shaping tool used in the manufacturing process of the ultra-large integral ring forging comprises an inner supporting ring piece, wherein a plurality of supporting rods are arranged on the inner wall of the inner supporting ring piece, and the other ends of all the supporting rods are connected with a reinforcing cylinder positioned at the central position of the inner supporting ring piece; the outer wall of the inner support ring piece is provided with a plurality of support mechanisms, each support mechanism has the same structure, and each support mechanism consists of a support leg, an adjusting cushion block and an arc-shaped rounding block from bottom to top.
The structure of the arc rounding block is as follows: the arc-shaped rounding block comprises a lower bottom surface, a front side surface, a rear side surface, a left side surface, a right side surface and an arc-shaped upper top surface, and the radian of the arc-shaped rounding block is determined according to the normal rolling of the ring piece to the inner diameter; for example, the process requires 13000 mm as the minimum point of the actual inner diameter ellipse with the inner diameter of 14800mm, the radian is processed according to 14800, and the width of the arc-shaped round block 1 is the same as the height of the ring piece; the ratio of the distance from the lower bottom surface of the arc-shaped rounding block to the lowermost end of the arc-shaped upper top surface to the length of the lower bottom surface is 2: 5.
the adjusting cushion block is of a cuboid structure, and the ratio of the length to the height of the adjusting cushion block is 100: 1; the width is the same as the ring height by ring height.
The diameter of the ultra-large integral ring forging is more than or equal to 10 meters.
The number of the supporting mechanisms is even, and the corresponding supporting mechanisms are distributed in central symmetry around the reinforcing cylinder.
The supporting rods are distributed in pairs in a central symmetry mode relative to the reinforcing cylinder.
The distance between adjacent supporting mechanisms is equal.
The support rods comprise a first support rod, a second support rod, a third support rod, a fourth support rod, a fifth support rod and a sixth support rod;
the first supporting rod and the fourth supporting rod are on the same straight line; the second supporting rod and the fifth supporting rod are on the same straight line; the third supporting rod and the sixth supporting rod are on the same straight line.
Six supporting mechanisms are respectively arranged on the outer wall of the inner supporting ring piece at equal intervals at the position corresponding to the first supporting rod, the position corresponding to the second supporting rod, the position corresponding to the third supporting rod, the position corresponding to the fourth supporting rod, the position corresponding to the fifth supporting rod and the position corresponding to the sixth supporting rod.
Six supporting mechanisms are further arranged between every two supporting mechanisms on the outer wall of the inner supporting ring piece.
The use method of the shaping tool used in the manufacturing process of the ultra-large integral ring forging piece comprises the following specific steps: calculating the size of the hot ring piece and the correction size of the short axis of the ellipse according to the thermal expansion coefficients of different materials of the large ring piece and the size of the ellipse of the ring piece; adjusting the outer diameter of the shaping tool by increasing or decreasing the number of the adjusting cushion blocks, and adjusting the calculated shape correcting position to clamp the shaping tool on the elliptical hot short shaft; along with the reduction of the temperature, the ring shrinks, the shaping tool props against the short axis of the ring, the shrinkage rate of the short axis of the ellipse is inhibited, and the ellipse amount of the ring is reduced; and taking out the ring after the ring is cooled.
The conventional small ring part shape correction scheme is to enlarge the inner diameter of the ring part by using hydraulic external force to perform shape correction. If a hydraulic system is adopted for shape correction, due to the existence of hydraulic oil, in order to prevent danger, the ring needs to be corrected after being cooled, and the cold-state deformation resistance of the ring is dozens of times of that of the hot-state deformation resistance. For example, q345 thermal state yield is about 20Mpa, cold state yield is at least 345Mpa, if 16 m ring piece shape correction in a cold state is realized, an oversized mechanical system needs to be manufactured, the strength of the used steel is higher than that of common structural steel, and the mechanical system close to 16 m cannot deform on the premise of ensuring the shape correction force. While a hydraulic cylinder providing a sizing force even requires pressure of tens of thousands of tons; moreover, if one of the multiple ejection mechanisms of the conventional system has a problem, the matching is not good, and the extra force is large, the ring can be directly damaged locally, so that the ring is scrapped. Moreover, the operation is complex, the realization is difficult and the investment is large. Therefore, conventional systems are not suitable for reshaping large rings, and therefore cold-state reshaping generally applies small rings.
After cold-state shape correction, the residual internal stress of the ring piece is large, and after heat treatment and machining, stress release is uneven, so that deformation is easier to occur compared with hot-state ring piece shape correction. The scheme of the invention adopts shaping measures which are completely different from the original conventional scheme. The shaping tool provided by the invention fully utilizes the characteristic that the ring is easy to deform when being in a hot state after rolling, and reduces the ovality of the ring through the shaping tool when the ring is in the hot state. By the aid of the method, the ellipse of the ring piece can be obviously reduced, so that the weight of raw materials is reduced, and the utilization rate of the materials is improved.
The shaping tool for the ultra-large integral ring forging has the advantages that the ultra-large integral ring forging shaping tool provided by the invention can be used for shaping the ultra-large ring which is scrapped to meet the machining size, particularly shaping the integral carbon steel ring of 10 meters or more to the required size, and avoiding huge economic loss. Meanwhile, the product allowance can be reduced, so that the consumption of raw materials is reduced, and great economic significance is achieved.
Drawings
Fig. 1 is a schematic structural view of a shaping tool according to embodiment 1 of the present invention;
fig. 2 is a schematic side view of a shaping tool in embodiment 1 of the present invention;
FIG. 3 is a front view of an arc-shaped rounding block in embodiment 1 of the present invention;
FIG. 4 is a side view of an arc-shaped round block in example 1 of the present invention;
fig. 5 is a schematic structural view of a shaping tool in embodiment 2 of the present invention;
in the figure, 1-arc rounding block; 2, adjusting a cushion block; 3-supporting legs; 4-inner support ring; 5-reinforcing cylinders; 6-supporting rods; 101. 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112-support mechanisms; 601-a first support bar; 602-a first support bar; 603-a first support bar; 604-a first support bar; 605-a first support bar; 606-a first support bar; 12-arc upper top surface, 13-front side surface, 14-lower bottom surface, 15-back side surface, 16-left side surface, 17-right side surface.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art may better understand the invention, but the invention is not limited thereto.
Example 1
A shaping tool used in the manufacturing process of an ultra-large integral ring forging (with the diameter of 16 meters) comprises an inner support ring piece 4, wherein a plurality of support rods 6 are arranged on the inner wall of the inner support ring piece 4, and the other ends of all the support rods 6 are connected with a reinforcing cylinder 5 positioned at the central position of the inner support ring piece 4; the outer wall of the inner support ring piece 4 is provided with a plurality of support mechanisms, each support mechanism has the same structure, and each support mechanism consists of a support leg 3, an adjusting cushion block 2 and an arc-shaped rounding block 1 from bottom to top.
The structure of the arc rounding block 1 is as follows: the arc rounding block 1 comprises a lower bottom surface 14, a front side surface 13, a rear side surface 15, a left side surface 16, a right side surface 17 and an arc upper top surface, and the radian of the arc rounding block 1 is determined according to the normal rolling of the ring piece to the inner diameter; for example, the process requires 13000 mm as the minimum point of the actual inner diameter ellipse with the inner diameter of 14800mm, the radian is processed according to 14800, and the width of the arc-shaped round block 1 is the same as the height of the ring piece; the ratio of the distance from the lower bottom surface 14 of the arc-shaped rounding block 1 to the lowermost end of the arc-shaped upper top surface 12 to the length of the lower bottom surface 14 is 2: 5.
the adjusting cushion block is of a cuboid structure, and the ratio of the length to the height of the adjusting cushion block is 100: 1; the width is the same as the ring height by ring height. The support rods 6 comprise a first support rod, a second support rod, a third support rod, a fourth support rod, a fifth support rod and a sixth support rod;
the first support bar 601 and the fourth support bar 604 are on the same straight line; the second support bar 602 is aligned with the fifth support bar 605; the third supporting bar 603 and the sixth supporting bar 606 are on the same straight line.
Six supporting mechanisms 101, 103, 105, 107, 109 and 111 are respectively arranged on the outer wall of the inner support ring member 4 at equal intervals at a position corresponding to the first supporting rod 601, a position corresponding to the second supporting rod 602, a position corresponding to the third supporting rod 603, a position corresponding to the fourth supporting rod 604, a position corresponding to the fifth supporting rod 605 and a position corresponding to the sixth supporting rod 606;
and six supporting mechanisms 102, 104, 106, 108, 110 and 112 are arranged between every two supporting mechanisms on the outer wall of the inner support ring member 4.
The use method of the shaping tool used in the manufacturing process of the ultra-large integral ring forging piece comprises the following specific steps: calculating the size of the hot ring piece and the correction size of the short axis of the ellipse according to the thermal expansion coefficients of different materials of the large ring piece and the size of the ellipse of the ring piece; adjusting the outer diameter of the shaping tool by increasing or decreasing the number of the adjusting cushion blocks, and adjusting the calculated shape correcting position to clamp the shaping tool on the elliptical hot short shaft; along with the reduction of the temperature, the ring shrinks, the shaping tool props against the short axis of the ring, the shrinkage rate of the short axis of the ellipse is inhibited, and the ellipse amount of the ring is reduced; and taking out the ring after the ring is cooled. According to the shaping tool, the ring is in a hot state for shaping, the characteristic that the ring is easy to deform in the hot state after rolling is fully utilized, and the ovality of the ring is reduced through the shaping tool when the ring is in the hot state. By the aid of the method, the ellipse of the ring piece can be obviously reduced, so that the weight of raw materials is reduced, and the utilization rate of the materials is improved.
Example 2
The difference from embodiment 1 is that six support mechanisms 101, 103, 105, 107, 109, 111 are provided on the outer wall of the inner support ring member 4 at equal intervals at positions corresponding to the first support bar 601, the second support bar 602, the third support bar 603, the fourth support bar 604, the fifth support bar 605, and the sixth support bar 606, respectively. The number of the supporting mechanisms in embodiment 2 is only half of that in embodiment 1, and the rest is the same as that in embodiment 1.
It is within the scope of the present invention to reduce the number of changes of the support mechanism as in embodiment 2, and to increase the number of changes of the support mechanism as appropriate.
In actual production, the 12m ring rolled at a certain time exceeds the reserved blank allowance due to the oval shape of the ring of 110mm, the finished product size cannot be processed, and the ring of about 100 tons is scrapped.
In the above situation, the inventor successfully processes the product by reducing the ellipse to 30mm through the shaping measure. The large ring piece is heavy in weight, large in size, difficult in rolling process and particularly difficult to control ellipticity, the ring piece with the diameter of more than 10m is very easy to appear when the ellipse is more than 100mm, and once the ellipse is too large and cannot be processed, one ring piece is scrapped, so that huge economic loss is caused. The inventor successfully shapes the large ring piece which is to be scrapped to the size meeting the requirement through the measure for many times, so that the scrappage rate is greatly reduced, and huge economic loss is recovered.
Claims (10)
1. The shaping tool used in the manufacturing process of the ultra-large integral ring forging is characterized by comprising an inner support ring piece (4), wherein a plurality of support rods (6) are arranged on the inner wall of the inner support ring piece (4), and the other ends of all the support rods (6) are connected with a reinforcing cylinder (5) positioned at the central position of the inner support ring piece (4); the outer wall of the inner support ring piece (4) is provided with a plurality of support mechanisms, each support mechanism has the same structure, and each support mechanism consists of a support leg (3), an adjusting cushion block (2) and an arc-shaped rounding block (1) from bottom to top.
2. The shaping tool used in the manufacturing process of the ultra-large integral ring forging piece according to claim 1, wherein the arc-shaped rounding block (1) has the following structure: the arc-shaped rounding block (1) comprises a lower bottom surface (14), a front side surface (13), a rear side surface (15), a left side surface (16), a right side surface (17) and an arc-shaped upper top surface, and the width of the arc-shaped rounding block (1) is the same as the height of the ring piece; the ratio of the distance from the lower bottom surface (14) of the arc-shaped rounding block (1) to the lowermost end of the arc-shaped upper top surface (12) to the length of the lower bottom surface (14) is 2: 5.
3. the shaping tool used in the manufacturing process of the ultra-large integral ring forging as claimed in claim 1, wherein the adjusting cushion block is of a cuboid structure, and the ratio of the length to the height of the adjusting cushion block is 100: 1; the width is the same as the ring height by ring height.
4. The shaping tool used in the manufacturing process of the ultra-large integral ring forging piece according to claim 1, wherein the diameter of the ultra-large integral ring forging piece is greater than or equal to 10 meters.
5. The shaping tool used in the manufacturing process of the ultra-large integral ring forging according to claim 1, wherein the number of the supporting mechanisms is even, and the corresponding supporting mechanisms are distributed in central symmetry with respect to the reinforcing cylinder (5); preferably, the distance between adjacent support means is equal.
6. The shaping tool used in the manufacturing process of the ultra-large integral ring forging as claimed in claim 1, wherein the supporting rods (6) are distributed in pairs in central symmetry with respect to the reinforcing cylinder (5).
7. The shaping tool used in the manufacturing process of the ultra-large integral ring forging according to claim 1, wherein the support rods (6) comprise a first support rod, a second support rod, a third support rod, a fourth support rod, a fifth support rod and a sixth support rod;
the first supporting rod and the fourth supporting rod are on the same straight line; the second supporting rod and the fifth supporting rod are on the same straight line; the third supporting rod and the sixth supporting rod are on the same straight line.
8. The shaping tool used in the manufacturing process of the ultra-large integral ring forging as claimed in claim 1, wherein six support mechanisms (101, 103, 105, 107, 109, 111) are respectively arranged on the outer wall of the inner support ring member (4) at equal intervals at positions corresponding to the first support rod, the second support rod, the third support rod, the fourth support rod, the fifth support rod and the sixth support rod.
9. The shaping tool used in the manufacturing process of the ultra-large integral ring forging according to claim 8, wherein six support mechanisms (102, 104, 106, 108, 110, 112) are further arranged between every two support mechanisms on the outer wall of the inner support ring (4).
10. The use method of the shaping tool in the manufacturing process of the ultra-large integral ring forging as claimed in claim 8, wherein the size of the hot ring and the shape correction size of the short axis of the ellipse are calculated according to the thermal expansion coefficients of different materials of the large ring and the size of the ellipse of the ring; adjusting the outer diameter of the shaping tool by increasing or decreasing the number of the adjusting cushion blocks, and adjusting the calculated shape correcting position to clamp the shaping tool on the elliptical hot short shaft; along with the reduction of the temperature, the ring shrinks, the shaping tool props against the short axis of the ring, the shrinkage rate of the short axis of the ellipse is inhibited, and the ellipse amount of the ring is reduced; and taking out the ring after the ring is cooled.
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| CN201911118528.8A CN110935756B (en) | 2019-11-15 | 2019-11-15 | Shaping tool used in manufacturing process of ultra-large integral ring forging and using method |
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| CN201911118528.8A CN110935756B (en) | 2019-11-15 | 2019-11-15 | Shaping tool used in manufacturing process of ultra-large integral ring forging and using method |
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| CN110935756B CN110935756B (en) | 2022-09-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112122515A (en) * | 2020-07-30 | 2020-12-25 | 伊莱特能源装备股份有限公司 | Process for rolling and shaping ultra-large integral ring forging |
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| CN110935756B (en) | 2022-09-16 |
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