CN214768646U - Rolling and forging dual-purpose rolling mill and combined unit - Google Patents

Abstract

The utility model relates to a metal pressure machining field especially relates to a rolling and forging dual-purpose rolling mill and combined set, and it is double or quadruple formula, including last work roll, lower work roll, hydraulic pressure screw-down device and main motor, its characterized in that, last work roll and the minimum correspondence of lower work roll are equipped with a platform pass, platform pass department is equipped with roll gap position sensor, the circumferencial direction and/or the axial direction of last work roll and lower work roll outside the platform pass are cylindrical surface; the main motor is a band-type brake motor. Compared with the prior art, the utility model has the advantages that: the switching of two kinds of production technology on can realizing a rolling mill can also realize the forging and pressing, both had improved because of the internal quality that forged deformation brought deeply, improved the homogeneity of product, had again because of the high efficiency of rolling and the high accuracy of external dimension, the product internal quality is good, and overall dimension is accurate to showing reduction energy consumption and manufacturing cost.

Description

Rolling and forging dual-purpose rolling mill and combined unit

Technical Field

The utility model relates to a metal pressure machining field especially relates to a dual-purpose combined set of rolling and forging.

Background

The metal product is generally obtained by smelting and casting ores and then performing pressure processing on the ores. In order to obtain products with better performance, generally, rolling, forging, extruding and other pressure processing methods are used, the as-cast structure can be damaged through certain degree of pressure processing, and the defects of looseness, shrinkage cavities, microcracks, air holes and the like are pressed, so that the structure uniformity and the mechanical performance are greatly improved. Rolling and forging belong to pressure processing methods, and the difference is that the forging and forging uses the up-and-down or left-and-right movement of a hammer head or an anvil to forge and deform the blank until a finished product is obtained; the rolling is to roll and deform the blank by a roller driven by a motor and a transmission system to rotate.

In the forging process, the forging press can apply larger forging pressure to the blank, the primary deformation is larger, the blank is subjected to stronger three-dimensional compressive stress during processing, the deformation is deep and better, large-sized blank is easy to refine grains, cracks, shrinkage porosity and shrinkage cavities in the blank can be compacted, and the blank can be formed and forged by multiple fires, so that the segregation can be diffused, the harmful metallographic structure can be improved, the performance and the homogeneity of a finished product can be improved, and the forging press is particularly beneficial to large-sized forgings and products with special performance. The forging press and the auxiliary tool are combined, the blank can be subjected to upsetting, drawing, rounding, extruding and the like, the deformation method is flexible, the product shapes are various, and the requirements of small batch and multiple varieties are met. Because the product is heated by more fire, the energy consumption is higher, and the forging and pressing size precision is not high, a larger machining allowance is required to ensure the size of the final product, the yield is lower, the efficiency is low, and the cost is high.

In the rolling process, the blank is continuously processed by utilizing the rotation of the roller, so that the method has the advantages of high efficiency, low energy consumption, high product size precision, high yield and low production cost. The deformation of each pass is limited by 'biting conditions', the strength of a roller and the power of a motor, the stress state of pressure processing is mainly plane deformation, the state of three-dimensional pressure stress is weaker, the deformation is mainly along the rolling direction, the product structure has directionality, the deformation depth is not as deep as forging, and the internal quality of the product is influenced to a certain extent. Due to the influence of the shape of the roller, the roller is mainly used for producing shaft and plate products and is suitable for mass production.

The Chinese patent application No. CN101249603B proposes a roll forging integrated process of high-strength and high-hardness alloy and roll forging equipment thereof. In the patent, in each deformation process, the forging and rolling of the blank are carried out in sequence, the stress state in the rolling deformation stage is basically consistent with that in the common rolling, and the improvement of the internal quality of the material is limited. In addition, the feeding of the blank is interrupted in the machining process, and the blank is further advanced after each rolling and forging. The method is an improvement of the forging method, and lacks continuity, high efficiency and high precision of rolling deformation of the blank in the whole length direction.

The forging and rolling composite flexible forming equipment provided by Chinese patent application No. 201410224157.2 is characterized in that a main roller, an auxiliary roller and a core roller for fixing a hollow revolving body are additionally arranged on the basis of a forging press, and the equipment is mainly used for three-roller cross rolling of a revolving piece. When the forging and pressing deformation is needed, the forging die is disassembled, the roller device is replaced, and the three-roller cross rolling is carried out on the rotary piece after the main roller is connected with a transmission system such as a motor and the like. The blank needs to be re-heated or re-heated during the tool changing process. If the rolling and forging deformation are conducted alternately, the forging and rolling dies need to be replaced frequently, the blank also needs to enter heating equipment frequently for heat preservation or heating, and therefore the rolling and forging processes conducted on the equipment are also conducted separately in essence.

For workpieces which need to be rolled and forged, the sequence can only be reversed among different units, and because the time for reversing the sequence is long, the workpieces need to be reheated for many times, the increase of heat energy and burning loss is caused, the energy consumption and the production cost are high, and related reports of rolling, forging and combined production in one unit are not found at present.

Disclosure of Invention

The utility model aims at providing a dual-purpose combined set of rolling and forging, overcome the not enough of prior art, combine forging and pressing and rolling advantage, improve the structure on dual rolling mill and the quadruple rolling mill, can realize rolling also can realize forging and pressing, the internal quality that existing forged deformation brought deeply improves, has rolling high efficiency and outside dimension's high accuracy again, can improve the homogeneity of product, reduction energy consumption and manufacturing cost.

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

the technical scheme is as follows: a rolling and forging dual-purpose rolling mill is of a double type and comprises an upper working roll, a lower working roll, a hydraulic screwdown gear and a main motor, and is characterized in that at least one platform hole pattern is correspondingly arranged on the upper working roll and the lower working roll, a roll gap position sensor is arranged at the platform hole pattern, and the upper working roll and the lower working roll are cylindrical surfaces in the circumferential direction and/or the axial direction outside the platform hole pattern; the main motor is a motor with a band-type brake.

The second technical proposal is that: a rolling and forging dual-purpose rolling mill is of a quadruple type and comprises an upper working roll, a lower working roll, an upper supporting roll, a lower supporting roll, a hydraulic screwdown gear and a main motor, and is characterized in that at least one platform pass is correspondingly arranged on the upper working roll and the lower working roll, a roll gap position sensor is arranged at the platform pass, and the upper working roll and the lower working roll are cylindrical rolling passes in the circumferential direction and/or the axial direction outside the platform pass; the main motor is a motor with a band-type brake; go up between backup roll and the last working roll, be equipped with the separation pneumatic cylinder between bottom suspension runner and the lower working roll respectively, go up and be connected through the bearing frame between backup roll, bottom suspension runner and the frame, but go up backup roll, lower backup roll frame relatively go up and down and rotate.

The third technical scheme is as follows: a rolling and forging dual-purpose rolling mill is of a quadruple type and comprises an upper working roll, a lower working roll, an upper supporting beam, a lower supporting beam, a hydraulic pressing device and a main motor, and is characterized in that at least one platform pass is correspondingly arranged on the upper working roll and the lower working roll, a roll gap position sensor is arranged at the platform pass, and the upper working roll and the lower working roll are cylindrical rolling passes in the circumferential direction and/or the axial direction outside the platform pass; the main motor is a motor with a band-type brake; the upper supporting beam and the lower supporting beam are connected with the frame through a supporting beam positioning device, and the upper supporting beam and the lower supporting beam can only move up and down relative to the frame and cannot rotate.

Compared with the prior art, the beneficial effects of the utility model are that: the advantage that combines forging and pressing and rolling equipment structure, through improving the structure on ordinary twofold rolling mill and the quadruple rolling mill, can realize rolling and the switching of forging and pressing deformation on a rolling mill, can realize rolling also can realize the forging and pressing, both had because of the forged internal quality who brings that the deformation is deep and thoroughly improves, improve the homogeneity of product, have again because of rolling high efficiency and external dimensions's high accuracy, improve production efficiency, product internal quality is good, the overall dimension is accurate, and show reduction energy consumption and manufacturing cost.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the rolling and forging combination unit of the present invention, which is a double rolling mill combination unit.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a schematic view of the working roll and the platform hole pattern in the first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a second embodiment of the rolling and forging combined unit of the present invention, which is a quadruple rolling mill combined unit.

Fig. 5 is a left side view of fig. 4.

Fig. 6 is a schematic structural diagram of a separation hydraulic cylinder between a work roll and a support roll in the second embodiment of the present invention, and the structure is the same in the third embodiment.

Fig. 7 is a schematic diagram of the working rolls and the supporting rolls in the second embodiment of the present invention, and the platform hole patterns are distributed in one position in the circumferential direction.

Fig. 8 is a schematic diagram of a triple structure of an embodiment of the rolling and forging combined unit of the present invention, which is a quadruple rolling mill combined unit, wherein a supporting beam is used to replace a supporting roller.

Fig. 9 is a left side view of fig. 8.

Fig. 10 is a schematic view of the working rolls and the supporting rolls of the second embodiment of the present invention, in which the platform passes are distributed symmetrically in the circumferential direction.

Fig. 11 is a schematic cross-sectional view of a support beam according to a third embodiment of the present invention, in which the cross-section of the support roller is rectangular.

Fig. 12 is a schematic cross-sectional view of a support beam according to a third embodiment of the present invention, in which the cross-section of the support roller is i-shaped.

In the figure: 1-a frame, 2-a lower working roll chock, 3-a lower working roll, 4-a blank, 5-a universal spindle, 6-a gear base, 7-a speed reducer, 8-a motor brake, 9-a main motor, 10-a roll gap position sensor, 11-a roller way, 12-a push machine, 13-a steel turner, 14-an upper working roll balance, 15-an upper roll electric pressure lower transmission mechanism, 16-a roll axial baffle, 17-an upper working roll electric pressure screw rod, 18-an upper working roll, 19-a platform hole type, 20-an upper working roll hydraulic pressure screwdown device, 21-an upper working roll chock, 41-a lower supporting roll, 42-a lower supporting roll chock, 43-an upper supporting roll balance, 44-an upper supporting roll, 45-an upper supporting roll chock, 46-lower working roll separation hydraulic cylinder, 47-upper working roll separation hydraulic cylinder, 51-lower supporting beam, 52-lower supporting beam positioning device, 53-upper supporting beam balance, 54-upper supporting beam and 55-upper supporting beam positioning device.

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 present application, 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.

See fig. 1-fig. 3, is a structural schematic diagram of an embodiment of the present invention, this is the combined unit that the double rolling mill constitutes, including frame 1, lower work roll bearing frame 2, speed reducer 7, main motor 9, go up work roll 18, lower work roll 3, universal spindle 5, gear frame 6, roll table 11, pusher 12 and tilting gear 13, main motor 9 upper band motor band-type brake 8, hydraulic pressure screw-down device comprises upper roll electric pressure lower drive mechanism 15, upper work roll electric pressure lead screw 17, upper work roll hydraulic pressure screw-down device 20, upper work roll bearing frame 21. The upper working roll 18 and the lower working roll 3 are provided with a platform hole pattern 19, the platform hole pattern is provided with a signal acquisition end of a roll gap position sensor 10, and the circumferential direction and the axial direction of the upper working roll and the lower working roll outside the platform hole pattern 19 are cylindrical surfaces.

The diameter of the upper working roll 18 and the lower working roll 3 is 1200mm, the length of the roll body is 2800mm, and the size of the flat pass 19 is 900X 502 mm. The upper working roll 18 and the lower working roll 3 are schematically shown in fig. 3. The blank 4 is heated to 1250 ℃ by a soaking furnace and then enters a roll forging combined unit. Firstly, the blank 4 enters the flat pass 19, then the large surface of the blank 4 is forged and deformed by 3 times, the forging amount is 50mm each time, the feeding amount is 200mm each time, and the size of the large end and the small end of the blank 4 after 2 times of forging are 850 multiplied by 500mm and 800 multiplied by 500mm respectively. Then, the blank 4 is moved to the rolling pass 31 by a pusher 12, and is firstly shaped by flat rolling for 1 pass, so that thickness deviation and joint marks generated by different forging and pressing are eliminated. The billet 4 is then turned 90 degrees by the tilting hook 13 and the pusher 12 and rolled 1 pass in the pass 31 holes with a pass reduction of 25mm and the billet 4 size is 825 × 500 mm. The blank 4 is turned by 90 degrees and enters the platform hole 19 again, the blank 4 is forged and pressed for 2 times in the platform hole 19, the forging amount is 50mm each time, the feeding amount is 200mm, and the size of the blank 4 is 850 multiplied by 400 mm. The blank 4 enters the rolling pass 31 for shaping rolling, the blank 4 enters the rolling pass 32 for vertical rolling for 1 pass after turning over steel, the size of the blank 4 is 800 multiplied by 400mm, the blank 4 enters the rolling pass 31 for flat rolling for 4 passes after turning over steel, and the size of the blank 4 is 820 multiplied by 260 mm. And turning over the steel to enter the rolling pass 33 for vertical rolling, then turning over the steel to enter the rolling pass 31 for flat rolling for 4 passes, wherein the size of the blank 4 is 835 multiplied by 120mm, turning over the steel to enter the rolling pass 34 for vertical rolling, the size of the blank 4 is 806 multiplied by 120mm, then turning over the steel to enter the rolling pass 31, and rolling to obtain a finished product of 810 multiplied by 100 mm. The large surface of the steel ingot is forged and deformed for 5 times, the center of the pressed part is loose and the hole is shrunk, and the size of the rolled finished product is accurate. The rolling passes 31, 32, 33, 34 are all conventional rolling passes.

See fig. 4-7, is the second structural schematic diagram of the embodiment of the present invention, this is the combined unit that the quadruple rolling mill constitutes, including frame 1, lower work roll bearing frame 2, speed reducer 7, main motor 9, go up work roll 18, lower work roll 3, go up supporting roll 44, bottom suspension roller 41, bottom suspension roller bearing frame 42, go up supporting roll bearing frame 45, universal spindle 5, gear frame 6, roll table 11, pusher 12 and tilting gear 13, main motor 9 goes up electrified motor band-type brake 8. The upper working roll 18 and the lower working roll 3 are provided with a platform hole pattern 19, the platform hole pattern is provided with a signal acquisition end of a roll gap position sensor 10, and the circumferential direction and the axial direction of the upper working roll and the lower working roll outside the platform hole pattern 19 are cylindrical surfaces. An upper working roll separating hydraulic cylinder 47 is arranged between the upper supporting roll 44 and the upper working roll 18, and lower working roll separating hydraulic cylinders 46 are respectively arranged between the lower supporting roll 41 and the lower working roll 3.

When the upper working roll separating hydraulic cylinder 47 and the lower working roll separating hydraulic cylinder 46 retract, the upper support roll 44 contacts the upper working roll 18, the lower support roll 41 contacts the lower working roll 3, the upper working roll 18 and the lower working roll 3 rotate at the moment to perform conventional rolling, the upper support roll 44 and the lower support roll 41 rotate synchronously along with the working rolls, and the working mode of the quadruple rolling mill combined unit is realized at the moment.

When the upper working roll separating hydraulic cylinder 47 and the lower working roll separating hydraulic cylinder 46 extend, the upper support roll 44 is separated from the upper working roll 18, the lower support roll 41 is separated from the lower working roll 3, at this time, the upper working roll 18 and the lower working roll 3 rotate to perform conventional rolling, but the upper support roll 44 and the lower support roll 41 do not rotate along with the working rolls, so that the working mode of the quadruple rolling mill unit is converted into the working mode of the double rolling mill unit.

In the second embodiment, the billet 4 can be continuously rolled directly after the forging operation by using the remaining circular arc portions of the flat pass 19 of the upper work roll 18 and the lower work roll 3, and the billet 4 having a length smaller than the circular arc portions can be roll-deformed by using the circular arc portions. If the blank 4 rolled in the platform hole is longer than the length of the circular arc part, the feed-back control of the motor position sensor 10 can be used for controlling the bite point position of the blank 4 to be close to the midpoint position of the circular arc section of the platform hole, the roll gap is kept unchanged, and the bulge is rolled for one pass. The blank 4 of the embodiment can also be rolled flat in other rolling passes as desired.

See fig. 8-9, is the utility model discloses three structural schematic diagrams of embodiment, this is the combined unit that quadruple rolling mill constitutes, including frame 1, lower work roll bearing frame 2, speed reducer 7, main motor 9, go up work roll 18, lower work roll 3, lower supporting beam 51, lower supporting beam positioner 52, go up supporting beam balance 53, go up supporting beam 54, go up supporting beam positioner 55, universal spiale 5, gear frame 6, roll table 11, pusher 12 and tilting gear 13, main motor 9 goes up electrified motor band-type brake 8. The upper working roll 18 and the lower working roll 3 are provided with a platform hole pattern 19, the platform hole pattern is provided with a signal acquisition end of a roll gap position sensor 10, and the circumferential direction and the axial direction of the upper working roll and the lower working roll outside the platform hole pattern 19 are cylindrical surfaces; the main motor 9 is a band-type brake servo motor. An upper work roll separating hydraulic cylinder 47 is arranged between the upper support beam 54 and the upper work roll 18, and lower work roll separating hydraulic cylinders 46 are respectively arranged between the lower support beam 51 and the lower work roll 3.

When the forging pressure is larger, in order to reduce the impact of forging, the upper supporting beam 54 and the lower supporting beam 51 are connected with the frame 1 by the upper supporting beam positioning device 55 and the lower supporting beam positioning device 52, and in order to reduce the contact stress between the upper supporting beam 54 and the lower supporting beam 51 and the corresponding working roll, the contact length or the contact area between the supporting roll and the working roll can be increased.

In the third embodiment, when the upper work roll separating hydraulic cylinder 47 and the lower work roll separating hydraulic cylinder 46 need to be extended to operate after the forging is finished, the upper support beam 54 is separated from the upper work roll 18, the lower support beam 51 is separated from the lower work roll 3, at this time, the upper work roll 18 and the lower work roll 3 can rotate to perform conventional rolling, but the upper support beam 54 and the lower support beam 51 do not rotate along with the work rolls, and the combined unit is in a double-forging combined unit operating mode.

The supporting beam can only move up and down, so that the structure of the supporting roller bearing seat is simplified, and the manufacturing cost can be reduced. The structure of the supporting beam can adopt various forms, and the cross-section structure of rectangle, circle, I-shaped or polygon is selected.

As shown in fig. 10-12, the number of the platform hole patterns 19 can be two in the circumferential direction, and two platform section hole patterns can be made, and can also be 4 sections, 6 sections and the like, so that the contact between the upper working roll 18 and the lower working roll 3 and the upper support beam 54 and the lower support beam 51 is changed from the line contact between two cylinders to the plane-to-plane contact, and the contact stress between the two cylinders can be greatly reduced. The surfaces of the upper support beam 54 and the lower support beam 51 may also be machined to match the surfaces of the lower work roll 3 and the upper work roll 18 to increase the contact area and reduce the contact stress.

The above embodiments are merely specific examples selected for the purpose of illustrating the objects, technical solutions and advantages of the present invention in detail, but should not limit the scope of the invention, and all modifications, equivalents and improvements made without departing from the spirit and principles of the present invention should fall within the scope of the invention.

Claims (10)

1. A rolling and forging dual-purpose rolling mill is of a double type and comprises an upper working roll, a lower working roll, a hydraulic screwdown gear and a main motor, and is characterized in that at least one platform hole pattern is correspondingly arranged on the upper working roll and the lower working roll, a roll gap position sensor is arranged at the platform hole pattern, and the upper working roll and the lower working roll are cylindrical surfaces in the circumferential direction and/or the axial direction outside the platform hole pattern; the main motor is a motor with a band-type brake.

2. The rolling mill for both rolling and forging as claimed in claim 1, wherein the number of the stages of the pass of the work roll in the circumferential direction is 1 to 12, the stages are distributed around the circumference, and the width of the pass of the work roll is 50mm to the length of the whole roll body.

3. A rolling and forging dual-purpose rolling mill is of a quadruple type and comprises an upper working roll, a lower working roll, an upper supporting roll, a lower supporting roll, a hydraulic screwdown gear and a main motor, and is characterized in that at least one platform pass is correspondingly arranged on the upper working roll and the lower working roll, a roll gap position sensor is arranged at the platform pass, and the upper working roll and the lower working roll are cylindrical rolling passes in the circumferential direction and/or the axial direction outside the platform pass; the main motor is a motor with a band-type brake; go up between backup roll and the last working roll, be equipped with the separation pneumatic cylinder between bottom suspension runner and the lower working roll respectively, go up and be connected through the bearing frame between backup roll, bottom suspension runner and the frame, but go up backup roll, lower backup roll frame relatively go up and down and rotate.

4. The rolling mill for both rolling and forging as claimed in claim 3, wherein the number of the stages of the pass of the work roll in the circumferential direction is 1 to 12, the stages are distributed around the circumference, and the width of the pass of the work roll is 50mm to the length of the whole roll body.

5. The mill of claim 3 wherein the upper and lower back-up rolls are circular in cross-sectional shape.

6. A rolling and forging dual-purpose rolling mill is of a quadruple type and comprises an upper working roll, a lower working roll, an upper supporting beam, a lower supporting beam, a hydraulic pressing device and a main motor, and is characterized in that at least one platform pass is correspondingly arranged on the upper working roll and the lower working roll, a roll gap position sensor is arranged at the platform pass, and the upper working roll and the lower working roll are cylindrical rolling passes in the circumferential direction and/or the axial direction outside the platform pass; the main motor is a motor with a band-type brake; the upper supporting beam and the lower supporting beam are connected with the frame through a supporting beam positioning device, and the upper supporting beam and the lower supporting beam can only move up and down relative to the frame and cannot rotate.

7. The rolling mill for both rolling and forging as claimed in claim 6, wherein the cross-sectional shape of the upper and lower support beams is any one of circular, rectangular, i-shaped, and regular polygonal.

8. The rolling mill for both rolling and forging as claimed in claim 6, wherein the number of the stages of the pass of the work roll in the circumferential direction is 1 to 12, the stages are distributed around the circumference, and the width of the pass of the work roll is 50mm to the length of the whole roll body.

9. The rolling mill for both rolling and forging as claimed in claim 6, wherein the contact surfaces of the upper and lower support beams and the corresponding work rolls are provided with planes, circular arc surfaces or curved surfaces matching the profiles of the corresponding work rolls.

10. A combined rolling and forging unit comprising a roller table, a pusher, a tilter, an operator and a rolling mill, wherein the rolling mill is any one of the rolling mills of claims 1 to 9.

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