A ring rolling device and method for thin-walled ring capable of online heat supplementation, heat preservation and measurement

Abstract

The present invention provides a thin-walled ring rolling device and method capable of online heat supplementation, heat preservation and measurement, which includes an active roller assembly, a core roller assembly, a cone roller assembly, a holding roller assembly and a measuring assembly; the active roller assembly includes an active roller bracket, an active roller, etc.; the core roller assembly includes a core roller, a workpiece base, a core roller heating rod fixing part, a core roller heating rod, etc.; the cone roller assembly includes a cone roller box, a temperature measuring thermocouple, an upper cone roller and a lower cone roller; the holding roller assembly is installed on both sides of the active roller bracket, and the holding roller assembly includes a holding roller bracket, a holding roller, a holding roller movement hydraulic cylinder, a gas pipeline and a gas nozzle; the measuring assembly includes a column, a movable crossbeam and a plurality of sliding workbenches. The present invention can reduce the number of ring rolling fires to improve work efficiency; and there is a heat supplementation and heat preservation device, so that the temperature of the workpiece can always be in a good rolling temperature range during the rolling process, thereby improving the ring rolling quality of the workpiece; the workpiece after rolling is measured to improve the accuracy of the ring rolled piece.

Description

Technical Field

[0001] The invention relates to the field of ring rolling, and in particular to a thin-walled ring rolling device capable of online heat supplementation, heat preservation and measurement and a method thereof. Background Art

[0002] Ring rolling is a continuous local plastic processing process. Compared with the integral die forging process, it has significant technical and economic advantages such as greatly reducing equipment tonnage and investment, low vibration and impact, energy saving and material saving, and low production cost. It is an advanced manufacturing technology for various seamless rings such as bearing rings, gear rings, flange rings, train wheels and hoops, gas turbine rings, etc., and is increasingly widely used in many industrial fields such as machinery, automobiles, trains, ships, petrochemicals, aerospace, and atomic energy. Ring rolling technology is currently one of the most effective means to produce high-performance seamless rings, and is widely used in many fields such as aviation, aerospace, energy, and transportation. During the rolling process, the ring material is fully deformed and well filled, achieving near-net forming, so that the streamlines are reasonably distributed along the shape of the part, minimizing the cutting of the streamlines and the exposure of the ends, thereby greatly improving the stress corrosion resistance, service life, and reliability of the forgings.

[0003] With the development of society, the quality requirements for rings are getting higher and higher, and the demand for large-size rings is increasing. Ring parts are mostly used under harsh conditions such as high temperature, high pressure, and corrosion, and the requirements for the organizational performance of rings are very strict. Traditional forming processes can no longer meet the requirements of rapid industrial development. Ring rolling technology is an inevitable choice for the production of ring parts.

[0004] When the ring is rolled on the ring rolling mill, the temperature of the ring will gradually decrease with the rolling time. When the temperature of the ring is lower than the final forging temperature, the ring needs to be taken out of the ring rolling mill and sent to the heating furnace for heating. After the temperature of the ring reaches the initial forging temperature, the ring is taken out and put back on the ring rolling mill for rolling. Due to the large size of the ring, it will consume a lot of manpower and time to achieve the above work, which seriously reduces work efficiency and increases production costs. At the same time, due to the rapid temperature drop of the ring during the rolling process, cracks and other defects will occur in the workpiece, resulting in reduced quality of the ring rolled product.

[0005] On the other hand, the existing rolling equipment cannot directly measure the size of the rolled piece after rolling, so it is impossible to obtain parameters such as the wall thickness of the rolled piece. Manual measurement is often required in the later stage, wasting a lot of manpower and material resources. Especially for special-shaped rolled pieces, measuring parameters such as wall thickness is very troublesome, and manual measurement often cannot accurately measure parameters such as the wall thickness of special-shaped rolled pieces. Summary of the invention

[0006] In order to solve the defects of the above-mentioned prior art, the present invention adds a heat supplement and heat preservation device on the basis of the original ring rolling mill. During the rolling process of the original ring rolling mill, the workpiece will have defects such as cracks due to the rapid temperature drop of the workpiece. After adding the heat supplement and heat preservation device, this situation can be greatly improved. During the rolling process, the temperature of the workpiece can always be within the good rolling temperature range, which improves the ring rolling quality of the workpiece; at the same time, the addition of a measuring device can more accurately measure the size of the rolled ring, especially the size of the special-shaped rolled piece, which reduces the waste of manpower and material resources and improves work efficiency.

[0007] Specifically, the present invention provides a thin-walled ring rolling device capable of online heat supplementation, heat preservation and measurement, which comprises an active roller assembly, a core roller assembly, a cone roller assembly and a holding roller assembly;

[0008] The active roller assembly comprises an active roller support, an active roller, a motor and a coupling, wherein the active roller is fixed on the active roller support and connected to the motor by means of the coupling, and the motor drives the active roller to perform circular motion through the coupling;

[0009] The core roller assembly comprises a core roller, a workpiece base, a core roller heating rod fixing part, a core roller heating rod, a core roller connecting bracket, a core roller connecting bracket base, a core roller connecting bracket horizontal movement hydraulic cylinder and a core roller connecting bracket vertical movement hydraulic cylinder, the first end of the core roller connecting bracket is fixed to the core roller connecting bracket base, the second end of the core roller connecting bracket is connected to the core roller, the workpiece base is arranged below the core roller, the core roller heating rod is arranged below the workpiece base by means of the core roller heating rod fixing part, the workpiece is placed on the workpiece base through the core roller, the core roller connecting bracket vertical movement hydraulic cylinder is actuated to move the core roller connecting bracket downward, thereby connecting with the core roller, and during the ring rolling process, the core roller connecting bracket horizontal movement hydraulic cylinder is actuated to pull the core roller to do feeding movement;

[0010] The cone roller assembly comprises a cone roller box, a temperature measuring thermocouple, a cone roller box horizontal motion hydraulic cylinder, an upper cone roller and a lower cone roller, wherein the upper cone roller and the lower cone roller are arranged on the side of the cone roller box, the temperature measuring thermocouple is arranged between the upper cone roller and the lower cone roller, and the cone roller box horizontal motion hydraulic cylinder pushes the box to move radially, so as to achieve full process contact between the thermocouple and the workpiece during the ring rolling process, and measure the outer wall temperature of the workpiece;

[0011] The holding roller assembly is installed on both sides of the active roller support, and the holding roller assembly includes a thermometer, a holding roller support, a holding roller and a holding roller movement hydraulic cylinder. The holding roller is arranged on the holding roller support, and a gas pipeline is installed on the holding roller support. A gas nozzle is arranged on one side of the gas pipeline, and an electromagnetic valve is arranged on the gas nozzle. During the rolling process, the holding roller support makes a rotary motion as the diameter of the workpiece increases, and the gas pipeline installed on the holding roller support makes a rotary motion at the same time, so as to realize the whole process of heating and heat preservation of the workpiece during the rolling process. During the heating process, by comparing with the measured temperature, the electromagnetic valve adjusts and controls the amount of gas passing through the gas nozzle, so as to realize the heating of the workpiece in different ranges and at different temperatures by the gas nozzle. The thermometers on both sides are respectively the first thermometer and the second thermometer.

[0012] The measuring assembly is installed on the concrete outer wall and is located between the workpiece and the tapered roller assembly. The measuring assembly includes a column, a movable crossbeam and a plurality of sliding workbenches. A slide rail is provided on the concrete outer wall. The column can slide along the slide rail. A track is provided on the inner side of the column. The two ends of the movable crossbeam are respectively connected to the tracks inside the columns on both sides and can slide up and down along the vertical direction of the column. A horizontal slide rail is provided at the bottom of the movable crossbeam. The plurality of sliding workbenches are provided on the horizontal slide rail and can slide horizontally along the horizontal slide rail.

[0013] Each sliding workbench is provided with casters, a motor high temperature protection shell, a telescopic rod and a motor; the motor high temperature protection shell is connected to the first end of the sliding workbench, the motor is arranged in the motor high temperature protection shell, and the telescopic rod is connected to the second end of the sliding workbench; the casters are connected to the output shaft of the motor and are close to the side wall of the movable crossbeam, so as to drive the entire sliding workbench to move on the movable crossbeam through friction between the casters and the movable crossbeam;

[0014] The plurality of sliding worktables include a first sliding worktable, a second sliding worktable, a third sliding worktable and a fourth sliding worktable;

[0015] Before the measuring system starts working, the second sliding worktable and the third sliding worktable are located in the middle of the movable beam, and the first sliding worktable and the fourth sliding worktable are located at both ends of the movable beam; during operation, the second sliding worktable and the third sliding worktable move from the middle to both ends respectively until they contact the inner wall of the workpiece and stop, and the first sliding worktable and the fourth sliding worktable move closer to the middle until they contact the outer wall of the workpiece and stop; the distance between the telescopic rods on the first sliding worktable and the second sliding worktable, the distance between the telescopic rods on the second sliding worktable and the third sliding worktable, the distance between the telescopic rods on the third sliding worktable and the fourth sliding worktable, and the distance between the telescopic rods on the first sliding worktable and the fourth sliding worktable are read respectively and recorded as the first side wall thickness, inner diameter, second side wall thickness and outer diameter of the workpiece.

[0016] Preferably, a roller is provided at the bottom of the tapered roller box.

[0017] Preferably, the first thermometer and the second thermometer are both infrared thermometers.

[0018] Preferably, the temperature measuring couple is a thermocouple.

[0019] Preferably, if the workpiece is a special-shaped ring rolled piece, the length of the telescopic rods of the second sliding worktable and the third sliding worktable are adjusted to the longest, and the telescopic rods of the second sliding worktable and the third sliding worktable are allowed to contact the position with the smallest inner diameter first, and the length of the telescopic rod and the height of the movable crossbeam are continuously adjusted to achieve the contact between the rod head of the telescopic rod and the workpiece at different inner diameters, and the values ​​of different inner diameters are recorded in real time to obtain the morphology data of the special-shaped ring rolled piece.

[0020] Preferably, the plurality of sliding workbenches are each provided with a groove, and the horizontal slide rail at the lower portion of the movable crossbeam can be clamped in the groove.

[0021] Preferably, another aspect of the present invention further provides an online heat supplementation and heat preservation method for thin-walled ring rolling, which comprises the following steps:

[0022] S1, the motor drives the active roller to make circular motion through the coupling;

[0023] S2. The workpiece is placed on the workpiece base through the mandrel, and the core roller connecting bracket is pressed down by the vertical hydraulic cylinder to contact and lock the core roller; under the action of the horizontal hydraulic cylinder, the core roller makes a feeding motion to make the workpiece contact with the active roller;

[0024] S3. The cone roller box first contacts the workpiece under the action of the hydraulic cylinder, and in the subsequent rolling process, the box moves radially away from the core roller, and in this process, it still maintains contact with the end face of the workpiece. The thermocouple continuously measures the temperature of the outer wall of the workpiece during the rolling process to complete the temperature detection;

[0025] S4, the holding roller contacts the workpiece through the action of the hydraulic cylinder, and is in contact with the workpiece at all times during the subsequent ring rolling process under the action of the hydraulic cylinder;

[0026] S5, comparing the temperature measured by the thermocouple with the suitable rolling temperature of the workpiece, and when the temperature is low, energizing the core roller heating rod to increase the core roller temperature; passing gas to the fire rod and igniting it to heat the workpiece, so that the workpiece is at a suitable rolling temperature to improve the ring rolling quality, wherein step S5 specifically includes the following sub-steps:

[0027] S51, respectively obtain the processing temperature ranges of the upper part, the middle part and the lower part of the workpiece, and determine the minimum temperature of the upper part of the workpiece as T 上min , the maximum temperature of the upper part of the workpiece is T 上max , the minimum temperature in the middle of the workpiece is T 中min , the maximum temperature in the middle of the workpiece is T 中max , the minimum temperature of the lower part of the workpiece is T 下min , the maximum temperature of the lower part of the workpiece is T 下max ;

[0028] S52, using the first temperature measuring instrument to measure the upper temperature T of the workpiece 上 The second thermometer measures the temperature T of the lower part of the workpiece. 下 , the temperature measuring couple measures the temperature T in the middle of the workpiece 中 ;

[0029] S53, determine the upper temperature T of the workpiece 上 , Temperature of the lower part of the workpiece T 下 and the temperature of the middle part of the workpiece T 中 , when T 上min <T 上 <T 上max , T 中min <T 中 <T 中max And T 下min <T 下 <T 下max When the temperature of the upper part of the workpiece is T 上 >T 上max or T 上 <T 上min When the temperature of the upper part of the fire bar is adjusted, the temperature of the middle part of the workpiece is T 中 >T 中max or T 中 <T 中min When the temperature of the lower part of the workpiece is T 下 >T 下max or T 下 <T 下min When the temperature on the top of the fire grate is adjusted.

[0030] S6. Measure the dimensional parameters of the workpiece after rolling by measuring the distance between the telescopic rods of the sliding worktable of the measuring assembly to obtain the size of the ring rolled piece.

[0031] Preferably, the dimensional parameters in step S6 include the wall thickness on both sides, the inner diameter, the outer diameter of the workpiece after rolling, and the wall thickness of different areas of the special-shaped rolled piece.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] (1) The present invention adds a heat supplement and heat preservation device on the basis of the original ordinary ring rolling mill. During the rolling process of the original ring rolling mill, the temperature of the workpiece drops rapidly, so the workpiece will produce defects such as cracks. After adding the heat supplement and heat preservation device, this situation can be greatly improved.

[0034] (2) The thermometric couple of the present invention is installed on the conical roller part. Since the conical roller moves radially as the ring is formed during the ring rolling process, when the thermometric couple is installed on the conical roller part, the thermometric couple can be in full contact with the workpiece, thereby obtaining more accurate temperature data.

[0035] (3) The heating device of the present invention is mainly composed of two parts, one is the core roller heating part, and the other is the gas pipeline heating part. Among them, the core roller heating part heats the core roller by adding a heating rod inside the core roller; the gas pipeline heating part is to install a gas pipeline on the roller bracket, and a gas nozzle is installed on one side of the gas pipeline, and the workpiece is heated by the nozzle. Since the roller bracket rotates during the ring forming process, the gas pipeline installed on it makes the same movement, which can realize the whole process of heating and heat preservation of the workpiece by the nozzle, and the nozzle is controlled by the solenoid valve, which can heat the workpiece more specifically.

[0036] (4) The present invention can reduce the number of ring rolling fires to improve work efficiency; and because of the presence of a heating and heat preservation device, the temperature of the workpiece can always be within a good rolling temperature range during the rolling process, thereby improving the ring rolling quality of the workpiece. Usually, the deformation resistance of carbon steel at 1100°C is 25Mpa, and the deformation resistance at 900°C is above 80Mpa. The lower the temperature, the faster the deformation resistance increases. Therefore, after adding a heating and heat preservation device, the temperature drop can be delayed, thereby improving the ring rolling quality and success rate.

[0037] (5) The measuring device of the present invention is directly arranged near the workpiece, so that the dimensions of the ring-rolled product can be measured online, which is convenient for the staff to adjust the rolling conditions in time according to the measured dimensions to obtain more accurate ring-rolled products. Especially for special-shaped rolled products, the parameters such as the wall thickness of the special-shaped rolled products can be obtained quickly and accurately, and recorded, which solves the shortcoming of the prior art that the parameters such as the wall thickness of the special-shaped rolled products cannot be measured quickly and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a front view of the overall structure of the present invention;

[0039] Figure 2 It is an oblique view of the overall structure of the present invention;

[0040] Figure 3 It is the assembly diagram of the active roller in the present invention;

[0041] Figure 4 This is the assembly diagram of the core roller of the present invention;

[0042] Figure 5 This is a schematic diagram of the structure of the core roller heating rod of the present invention;

[0043] Figure 6 This is the assembly diagram of the tapered roller in the present invention;

[0044] Figure 7 It is a schematic diagram of the structure of the temperature measuring couple in the present invention;

[0045] Figure 8 This is an assembly diagram of the holding roller in the present invention;

[0046] Fig. 9 This is a schematic diagram of the pipeline branch structure in the present invention;

[0047] Fig.10 It is a schematic diagram of the assembly of the infrared thermometer of the present invention;

[0048] Fig.11 It is a schematic diagram of the structure of the measuring device in the present invention;

[0049] Fig.12 It is a schematic diagram of the structure of the sliding workbench in the present invention;

[0050] Fig.13 FIG. 4 is a schematic diagram of the method flow of step S5 of the present invention.

[0051] Some of the reference numerals in the figure are as follows:

[0052] 1-active roller assembly, 2-core roller connecting bracket vertical motion hydraulic cylinder, 3-core roller connecting bracket horizontal motion hydraulic cylinder, 4-core roller assembly, 5-infrared assembly, 6-measuring assembly, 7-cone roller assembly, 8-concrete wall, 9-cone roller box horizontal motion hydraulic cylinder, 10-holding roller assembly, 11-holding roller motion hydraulic cylinder, 12-active roller, 13-coupling, 14-motor, 15-active roller bracket, 16-core roller, 17-workpiece, 18-workpiece base, 19-core roller heating rod fixing part, 20-core roller heating rod, 21-core roller connecting bracket, 22 -Core roller connecting bracket base, 23-cone roller box, 24-temperature measuring couple, 25-roller, 26-lower cone roller, 27-upper cone roller, 28-gas nozzle, 29-holding roller, 30-gas pipeline branch, 31-gas pipeline, 32-holding roller bracket, 33-gas pipeline fixed bracket, 34-gas control solenoid valve, 35-infrared thermometer, 36-infrared thermometer bracket, 37-column, 38-movable crossbeam, 39-sliding workbench, 40-wheel caster, 41-motor high temperature protection shell, 42-telescopic rod, 43-special-shaped ring rolled piece, 4101-motor. DETAILED DESCRIPTION

[0053] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0054] The present invention provides a device for online heat supplementation, heat preservation and dimension measurement of thin-walled ring rolling. Figure 1 and Figure 2 As shown, it includes an active roller assembly 1, a core roller assembly 4, a tapered roller assembly 7, an infrared assembly 5, a holding roller assembly 10 and a measuring assembly 6.

[0055] like Figure 3 As shown, the active roller assembly 1 includes an active roller bracket 15, an active roller 12, a motor 14 and a coupling 13. The active roller 12 is fixed on the active roller bracket 15 and connected to the motor 14 by means of the coupling 13. The motor 14 drives the active roller 12 to perform circular motion through the coupling 13.

[0056] like Figure 4 and Figure 5As shown, the core roller assembly 4 includes a core roller 16, a workpiece base 18, a core roller heating rod fixing part 19, a core roller heating rod 20, a core roller connecting bracket 21, a core roller connecting bracket base 22, a core roller connecting bracket 21 horizontal movement hydraulic cylinder 3 and a core roller connecting bracket 21 vertical movement hydraulic cylinder 2, the first end of the core roller connecting bracket 21 is fixed on the core roller connecting bracket base 22, the second end of the core roller connecting bracket 21 is connected to the core roller 16, the workpiece base 18 is arranged below the core roller 16, the core roller heating rod 20 is arranged below the workpiece base 18 by means of the core roller heating rod fixing part 19, the workpiece 17 is placed on the workpiece base 18 through the core roller 16, the core roller connecting bracket 21 vertical movement hydraulic cylinder 2 is actuated to move the core roller connecting bracket 21 downward, thereby connecting to the core roller 16, and during the ring rolling process, the core roller connecting bracket 21 horizontal movement hydraulic cylinder 3 is actuated to pull the core roller 16 for feeding movement.

[0057] like Figure 6 As shown, the cone roller assembly 7 includes a cone roller housing 23, a temperature measuring thermocouple 24, a hydraulic cylinder 9 for horizontal movement of the cone roller housing 23, an upper cone roller 27 and a lower cone roller 26. The upper cone roller 27 and the lower cone roller 26 are arranged on the side of the cone roller housing 23, and the temperature measuring thermocouple 24 is arranged between the upper cone roller 27 and the lower cone roller 26. The hydraulic cylinder 9 for horizontal movement of the cone roller housing 23 pushes the cone roller housing 23 to move radially, so that the temperature measuring thermocouple 24 and the workpiece 17 are in full contact during the ring rolling process, and the outer wall temperature of the workpiece 17 is measured. Figure 7 As shown, the temperature measuring couple 24 is configured as a rod as a whole, and a couple is provided at the end.

[0058] like Figure 8 and Fig. 9 As shown, the roller assembly 10 is installed on both sides of the active roller bracket 15. The roller assembly 10 includes a roller bracket 32, a roller 29 and a roller movement hydraulic cylinder 11. The roller 29 is arranged on the roller bracket 32. A gas pipeline 31 is installed on the roller 29. The gas pipeline 31 is fixed by means of a gas pipeline fixing bracket 33. A gas pipeline branch 30 is arranged at the end of the gas pipeline 31. A gas nozzle 28 is arranged on one side of the gas pipeline 31, and a solenoid valve 34 is arranged on the gas nozzle 28. During the rolling process, the roller bracket 32 ​​performs a rotary motion as the diameter of the workpiece 17 increases, and the gas pipeline 31 installed on the roller bracket 32 ​​performs the same motion. Therefore, the whole process of heating and heat preservation of the workpiece 17 during the rolling process can be realized. During the heating process, by comparing with the measured temperature, the solenoid valve 34 can automatically adjust and control the amount of gas passing through the gas nozzle 28, so that the gas nozzle 28 can heat the workpiece 17 in different ranges and at different temperatures. As shown in FIG. Fig.10As shown, during the heat preservation process of the workpiece 17, two infrared thermometers 35 installed on the concrete wall 8 respectively measure the temperature of the outer wall and the inner wall of the workpiece 17, and the infrared thermometer 35 can swing up and down to measure the temperature of different axial points. According to the temperature measured by the infrared thermometer 35, the workpiece 17 can be heated in a targeted manner by adjusting the gas control solenoid valve 34. The infrared thermometer 35 is fixed by means of an infrared thermometer bracket 36.

[0059] like Fig.11 and Fig.12 As shown, the measuring assembly 6 includes a column 37, a movable beam 38 and a plurality of sliding workbenches 39. The two columns 37 are respectively arranged on tracks above the two sides of the concrete wall 8 and can move along the concrete wall 8. A vertical track is arranged inside each column 37. The two ends of the movable beam 38 are respectively connected to the tracks inside the columns 37 on both sides. The movable beam 38 can be raised and lowered in the vertical direction of the column 37 with the help of the track. A horizontal slide rail is arranged at the bottom of the movable beam 38. A plurality of sliding workbenches 39 are connected to the horizontal slide rail of the movable beam 38 and can slide on the horizontal slide rail. The sliding workbench 39 is provided with a groove for accommodating the horizontal slide rail, which is a dovetail groove in this embodiment.

[0060] Each sliding table 39 includes casters 40, a motor high temperature protection shell 41, a telescopic rod 42 and a motor 4101. By adjusting the position of the movable crossbeam 38 and the casters 40, the rolled workpiece 17 can be accurately measured. The motor high temperature protection shell 41 is connected to the first end of the sliding table 39, the motor 4101 is arranged inside the motor high temperature protection shell 41, and the telescopic rod 42 is connected to the second end of the sliding table 39; the casters 40 are connected to the output shaft of the motor 4101 and are close to the side wall of the movable crossbeam 38, so as to achieve the movement of the entire sliding table 39 driven by the friction between the movable crossbeam 38.

[0061] The device is provided with four sets of sliding worktables 39, which are respectively a first sliding worktable, a second sliding worktable, a third sliding worktable and a fourth sliding worktable in order from left to right.

[0062] Before the measuring system starts working, the second sliding worktable and the third sliding worktable are located in the middle of the movable beam 38, and the first sliding worktable and the fourth sliding worktable are located at both ends of the movable beam 38; during operation, the second sliding worktable and the third sliding worktable move left and right respectively until they contact the inner wall of the workpiece 17 and stop, and the first sliding worktable and the fourth sliding worktable move toward the middle until they contact the outer wall of the workpiece 17 and stop; the distance between the telescopic rods 42 on the first sliding worktable and the second sliding worktable, the distance between the telescopic rods 42 on the second sliding worktable and the third sliding worktable, the distance between the telescopic rods 42 on the third sliding worktable and the fourth sliding worktable, and the distance between the telescopic rods 42 on the first sliding worktable and the fourth sliding worktable are read respectively and recorded as the left wall thickness, inner diameter, right wall thickness and outer diameter of the workpiece 17. If the workpiece 17 is a special-shaped ring rolled piece 43, on this basis, the length of the telescopic rod 42 of the second sliding worktable and the third sliding worktable can be adjusted to the longest, so that the telescopic rod 42 of the second sliding worktable and the third sliding worktable first contacts the position with the smallest inner diameter, and the length of the telescopic rod 42 and the height of the movable crossbeam 38 are continuously adjusted to achieve the contact between the rod head of the telescopic rod 42 and the workpiece 17 at different inner diameters, and the values ​​of different inner diameters are recorded in real time to obtain the morphological data of the special-shaped ring rolled piece 43.

[0063] Preferably, a roller 25 is provided at the bottom of the tapered roller box 23 .

[0064] Preferably, another aspect of the present invention further provides a thin-walled ring rolling and measuring method, such as Fig.13 As shown, it includes the following steps:

[0065] S1, the motor 14 drives the active roller 12 to make a circular motion through the coupling 13.

[0066] S2. The workpiece 17 is placed on the workpiece base 18 through the core shaft. The core roller connecting bracket 21 is pressed down by the vertical hydraulic cylinder to contact and lock the core roller 16. Under the action of the horizontal hydraulic cylinder, the core roller 16 performs a feeding motion to make the workpiece 17 contact the active roller 12.

[0067] S3. The cone roller box 23 first contacts the workpiece 17 under the action of the hydraulic cylinder, and in the subsequent rolling process, the box moves radially away from the core roller 16, and in this process, it still keeps in contact with the end face of the workpiece 17. The temperature measuring thermocouple 24 continuously measures the outer wall temperature of the workpiece 17 during the rolling process to complete the temperature detection.

[0068] S4. The holding roller 29 is in contact with the workpiece 17 through the action of the hydraulic cylinder, and is in contact with the workpiece 17 at all times during the subsequent ring rolling process under the action of the hydraulic cylinder.

[0069] S5. The temperature measured by the thermocouple 24 is compared with the suitable rolling temperature of the workpiece 17. When the temperature is low, the core roller heating rod 20 is energized to increase the temperature of the core roller 16; gas is passed through the fire grate and ignited to heat the workpiece 17 so that the workpiece 17 is at a suitable rolling temperature to improve the ring rolling quality.

[0070] The rolling process will generate plastic deformation heat in the rolling zone, friction heat between the active roller 12 and the ring, friction heat between the core roller 16 and the ring, exchange heat between the active roller 12 and the ring, exchange heat between the core roller 16 and the ring, friction heat between the upper and lower cone rollers and the ring, exchange heat between the upper and lower cone rollers and the ring, air convection heat and thermal radiation heat.

[0071] Among them: The calculation formula for plastic deformation heat in the rolling zone is:

[0072]

[0073] The calculation formulas for the friction heat between the active roller 12 and the ring, the friction heat between the core roller 16 and the ring, and the friction heat between the upper and lower cone rollers and the ring are:

[0074] q,=μp ε v

[0075] The heat exchange calculation formula between the active roller 12 and the ring, the heat exchange between the core roller 16 and the ring, and the heat exchange between the upper and lower cone rollers and the ring is:

[0076] The air heat convection calculation formula is:

[0077] q d =α(T w -T0)

[0078] The thermal radiation calculation formula is:

[0079] q F =εσ[(T W +273) 4 -(T0+273) 4 ]

[0080] In the formula, k q —Indicates the percentage of strain energy converted into heat energy, a dimensionless constant, generally 0.9-0.95; — equivalent stress; —equivalent strain rate; h—ring width; μ—friction coefficient; p ε —force per unit area; v—relative sliding velocity; T′—roller temperature; T b —Surface temperature of the contact area immediately after contact; λ—Heat transfer coefficient between the ring and the roller; ρ—Material density; c—Material specific heat capacity; τ—Transient thermal conductivity penetration time; α—Convection heat transfer coefficient; T w—Ring or roller temperature; T0—air temperature; ε—surface radiation coefficient; σ—Boltzmann constant.

[0081] Among them, Fig.13 As shown, step S5 specifically includes the following sub-steps:

[0082] S51, respectively obtain the processing temperature ranges of the upper part of the workpiece 17, the middle part of the workpiece 17 and the lower part of the workpiece 17, and determine the minimum temperature of the upper part of the workpiece 17 as T 上min , the maximum temperature of the upper part of the workpiece 17 is T 上max , the minimum temperature in the middle of workpiece 17 is T 中min , the maximum temperature in the middle of workpiece 17 is T 中max , the minimum temperature of the lower part of the workpiece 17 is T 下min , the maximum temperature of the lower part of the workpiece 17 is T 下max ;

[0083] S52, using the first temperature measuring instrument to measure the upper temperature T of the workpiece 17 上 The second temperature measuring instrument measures the temperature T of the lower part of the workpiece 17 下 The temperature measuring couple 24 measures the temperature T of the middle part of the workpiece 17 中 ;

[0084] S53, determine the upper temperature T of the workpiece 17 上 , the lower temperature of workpiece 17 T 下 and the temperature T of the middle part of the workpiece 17 中 , when T 上min <T 上 <T 上max , T 中min <T 中 <T 中max And T 下min <T 下 <T 下max When the temperature T of the upper part of the workpiece 17 is 上 >T 上max or T 上 <T 上min When the temperature of the upper part of the fire bar is adjusted, when the temperature T 中 >T 中max or T 中 <T 中min When the temperature of the middle part of the fire grate is adjusted, when the temperature of the lower part of the workpiece 17 is T 下 >T 下max or T 下 <T 下min When the temperature on the top of the fire grate is adjusted.

[0085] S6. The rolled workpiece 17 is measured by the telescopic rods 42 of the plurality of sliding work tables 39 to obtain the size of the ring rolled piece.

[0086] The working principle of the present invention is further explained below:

[0087] The core roller connecting bracket base 22 is placed on the active roller bracket 15, the core roller connecting bracket 21 is connected to the core roller connecting bracket base 22, the bracket vertical movement hydraulic cylinder 2 is placed on the core roller connecting bracket base 22, and pushes the core roller connecting bracket 21 to make a rotational motion, thereby realizing the contact and separation of the core roller connecting bracket 21 and the core roller 16; the bracket horizontal movement hydraulic cylinder 3 is connected to the active roller bracket 15, and pushes the core roller connecting bracket 21 to make a horizontal motion, thereby realizing the feeding motion of the core roller 16; the workpiece 17 is placed on the workpiece base 18, and the core roller heating rod 20 is connected to the workpiece base 18 through the core roller heating rod fixing piece 19, and the main heating part of the core roller heating rod 20 is inside the core roller 16, thereby realizing the heating and heat preservation function of the core roller 16 during the ring rolling process.

[0088] The conical roller part includes a conical roller horizontal motion hydraulic cylinder 9, a conical roller box 23, a temperature measuring thermocouple 24, a roller 25, a lower conical roller 26, and an upper conical roller 27. During the ring rolling process, the horizontal motion hydraulic cylinder 9 moves forward and backward to realize the conical roller box 23. According to the ring rolling forming process, the temperature measuring thermocouple 24 can be in full contact with the workpiece 17, so as to know the outer wall temperature of the ring during the ring rolling process.

[0089] The holding roller part is composed of holding rollers 29 and holding roller brackets 32. Holding rollers 29 are distributed on both sides of active roller brackets 15. Gas pipeline fixing brackets 33 are installed on holding roller brackets 32. Gas pipeline 31 is installed on holding roller brackets 32 through brackets 33. Gas is introduced into one side of gas pipeline 31, and a working gas nozzle 28 is installed on the other side. When the temperature obtained by the temperature measuring thermocouple 24 finds that the temperature of the outer wall of the workpiece 17 is too low, the workpiece 17 can be heated by the working gas nozzle 28. During the ring rolling forming process, the holding roller motion hydraulic cylinder 11 can control the holding roller bracket 32 ​​to perform a rotary motion to achieve full-process contact with the workpiece 17. During the movement of the holding roller bracket 32, the gas pipeline 31 is driven to move, so that the gas nozzle 28 can heat the entire rolling process. During the heat preservation process of the workpiece 17, two infrared thermometers 35 are installed on the concrete wall 8 to measure the temperature of the outer wall and the inner wall of the workpiece 17 respectively. The infrared thermometer on the left is the first thermometer, which is used to measure the temperature of the upper part of the workpiece 17, and the infrared thermometer on the right is the second thermometer, which is used to measure the temperature of the lower part of the workpiece 17. In addition, the infrared thermometer 35 can swing up and down to measure the temperature at different points in the axial direction. According to the temperature measured by the infrared thermometer 35, the workpiece 17 can be heated in a targeted manner by adjusting the gas control valve 34.

[0090] Before the measuring system starts working, the second and third sliding workbenches are located in the middle of the movable crossbeam 38, and the first and fourth sliding workbenches are located at both ends of the movable crossbeam 38; during operation, the second and third sliding workbenches move left and right respectively until they come into contact with the inner wall of the workpiece 17 and stop, and the first and fourth sliding workbenches move toward the middle until they come into contact with the outer wall of the workpiece 17 and stop; the distances between the telescopic rods 42 on the first and second, second and third, third and fourth, and first and fourth sliding workbenches are read respectively, and recorded as the left wall thickness, inner diameter, right wall thickness and outer diameter of the workpiece 17. If the workpiece 17 is a special-shaped ring rolled product 43, the working process is roughly similar to the above operation, and the length of the telescopic rods 42 of the second and third sliding workbenches can be adjusted to the longest, and the telescopic rods 42 can first contact the position with the smallest inner diameter, and the length of the telescopic rods 42 and the height of the movable crossbeam 38 can be adjusted continuously, so that the rod head of the telescopic rod 42 can contact the workpiece 17 at different inner diameters to obtain the inner diameters of different areas, and the values ​​of different inner diameters can be recorded in real time to obtain the morphological data of the special-shaped ring rolled product 43.

[0091] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A thin-walled ring rolling device capable of online heat supplementation, heat preservation and measurement, characterized in that: It includes a driving roller assembly, a core roller assembly, a cone roller assembly, a holding roller assembly and a measuring assembly; The active roller assembly comprises an active roller support, an active roller, a motor and a coupling, wherein the active roller is fixed on the active roller support and connected to the motor by means of the coupling, and the motor drives the active roller to perform circular motion through the coupling; The core roller assembly comprises a core roller, a workpiece base, a core roller heating rod fixing part, a core roller heating rod, a core roller connecting bracket, a core roller connecting bracket base, a core roller connecting bracket horizontal movement hydraulic cylinder and a core roller connecting bracket vertical movement hydraulic cylinder, the first end of the core roller connecting bracket is fixed to the core roller connecting bracket base, the second end of the core roller connecting bracket is connected to the core roller, the workpiece base is arranged below the core roller, the core roller heating rod is arranged below the workpiece base by means of the core roller heating rod fixing part, the workpiece is placed on the workpiece base through the core roller, the core roller connecting bracket vertical movement hydraulic cylinder is actuated to move the core roller connecting bracket downward, thereby connecting with the core roller, and during the ring rolling process, the core roller connecting bracket horizontal movement hydraulic cylinder is actuated to pull the core roller to do feeding movement; The cone roller assembly comprises a cone roller box, a temperature measuring thermocouple, a cone roller box horizontal motion hydraulic cylinder, an upper cone roller and a lower cone roller, wherein the upper cone roller and the lower cone roller are arranged on the side of the cone roller box, the temperature measuring thermocouple is arranged between the upper cone roller and the lower cone roller, and the cone roller box horizontal motion hydraulic cylinder pushes the box to move radially, so as to achieve full process contact between the thermocouple and the workpiece during the ring rolling process, and measure the outer wall temperature of the workpiece; The holding roller assembly is installed on both sides of the active roller support, and the holding roller assembly includes a thermometer, a holding roller support, a holding roller and a holding roller movement hydraulic cylinder. The holding roller is arranged on the holding roller support, and a gas pipeline is installed on the holding roller support. A gas nozzle is arranged on one side of the gas pipeline, and an electromagnetic valve is arranged on the gas nozzle. During the rolling process, the holding roller support performs a rotary motion as the diameter of the workpiece increases, and the gas pipeline installed on the holding roller support performs a rotary motion at the same time, so as to realize the whole process of heating and heat preservation of the workpiece during the rolling process. During the heating process, by comparing with the measured temperature, the electromagnetic valve adjusts and controls the amount of gas passing through the gas nozzle, so as to realize the heating of the workpiece in different ranges and at different temperatures by the gas nozzle. The thermometers on both sides are the first thermometer and the second thermometer respectively. The measuring assembly is installed on the concrete outer wall and is located between the workpiece and the tapered roller assembly. The measuring assembly includes a column, a movable crossbeam and a plurality of sliding workbenches. A slide rail is provided on the concrete outer wall. The column can slide along the slide rail. A track is provided on the inner side of the column. The two ends of the movable crossbeam are respectively connected to the tracks inside the columns on both sides and can slide up and down along the vertical direction of the column. A horizontal slide rail is provided at the bottom of the movable crossbeam. The plurality of sliding workbenches are provided on the horizontal slide rail and can slide horizontally along the horizontal slide rail. Each sliding workbench is provided with casters, a motor high temperature protection shell, a telescopic rod and a motor; the motor high temperature protection shell is connected to the first end of the sliding workbench, the motor is arranged in the motor high temperature protection shell, and the telescopic rod is connected to the second end of the sliding workbench; the casters are connected to the output shaft of the motor and are close to the side wall of the movable crossbeam, so as to drive the entire sliding workbench to move on the movable crossbeam through friction between the casters and the movable crossbeam; The plurality of sliding worktables include a first sliding worktable, a second sliding worktable, a third sliding worktable and a fourth sliding worktable; Before the measuring system starts working, the second sliding worktable and the third sliding worktable are located in the middle of the movable beam, and the first sliding worktable and the fourth sliding worktable are located at both ends of the movable beam; during operation, the second sliding worktable and the third sliding worktable move from the middle to both ends respectively until they contact the inner wall of the workpiece and stop, and the first sliding worktable and the fourth sliding worktable move closer to the middle until they contact the outer wall of the workpiece and stop; the distance between the telescopic rods on the first sliding worktable and the second sliding worktable, the distance between the telescopic rods on the second sliding worktable and the third sliding worktable, the distance between the telescopic rods on the third sliding worktable and the fourth sliding worktable, and the distance between the telescopic rods on the first sliding worktable and the fourth sliding worktable are read respectively and recorded as the first side wall thickness, inner diameter, second side wall thickness and outer diameter of the workpiece.

2. The thin-walled ring rolling device capable of online heat supplementation, heat preservation and measurement according to claim 1 is characterized in that: A roller is arranged at the bottom of the tapered roller box.

3. The thin-walled ring rolling device capable of online heat supplementation, heat preservation and measurement according to claim 1 is characterized in that: The first thermometer and the second thermometer are both infrared thermometers.

4. The thin-walled ring rolling device capable of online heat supplementation, heat preservation and measurement according to claim 1 is characterized in that: The temperature measuring couple is a thermocouple.

5. The thin-walled ring rolling device capable of online heat supplementation, heat preservation and measurement according to claim 1 is characterized in that: If the workpiece is a special-shaped ring rolled piece, adjust the length of the telescopic rods of the second sliding worktable and the third sliding worktable to the longest, so that the telescopic rods of the second sliding worktable and the third sliding worktable first contact the position with the smallest inner diameter, and continuously adjust the length of the telescopic rod and the height of the movable crossbeam to achieve the contact between the rod head of the telescopic rod and the workpiece at different inner diameters, and record the values ​​of different inner diameters in real time to obtain the morphology data of the special-shaped ring rolled piece.

6. The thin-walled ring rolling device capable of online heat supplementation, heat preservation and measurement according to claim 1 is characterized in that: The plurality of sliding workbenches are each provided with a groove, and the horizontal slide rail at the lower portion of the movable crossbeam can be clamped in the groove.

7. A ring rolling mill measurement method for a thin-walled ring rolling device capable of online heat supplementation, heat preservation and measurement based on claim 1, characterized in that: S1: The motor drives the active roller to make circular motion through the coupling; S2: The workpiece is placed on the workpiece base through the mandrel, and the core roller connecting bracket is pressed down by the vertical hydraulic cylinder to contact and lock the core roller; under the action of the horizontal hydraulic cylinder, the core roller makes a feeding motion to make the workpiece contact with the active roller; S3: The cone roller box first contacts the workpiece under the action of the hydraulic cylinder, and in the subsequent rolling process, the box moves radially away from the core roller, and in this process, it still maintains contact with the end face of the workpiece. The thermocouple continuously measures the temperature of the outer wall of the workpiece during the rolling process to complete the temperature detection; S4: The holding roller contacts the workpiece through the action of the hydraulic cylinder, and is in contact with the workpiece at all times during the subsequent ring rolling process under the action of the hydraulic cylinder; S5: The temperature measured by the thermocouple is compared with the suitable rolling temperature of the workpiece. When the temperature is low, the core roller heating rod is energized to increase the core roller temperature; the gas nozzle is energized and ignited to heat the workpiece so that the workpiece is at a suitable rolling temperature to improve the ring rolling quality. Step S5 specifically includes the following sub-steps: S51: Obtain the processing temperature ranges of the upper part, the middle part and the lower part of the workpiece respectively, and determine the minimum temperature of the upper part of the workpiece as T 上min , the maximum temperature of the upper part of the workpiece is T 上max , the minimum temperature in the middle of the workpiece is T 中min , the maximum temperature in the middle of the workpiece is T 中max , the minimum temperature of the lower part of the workpiece is T 下min , the maximum temperature of the lower part of the workpiece is T 下max ; S52: Use the first temperature measuring instrument to measure the upper temperature T of the workpiece 上 The second thermometer measures the temperature T of the lower part of the workpiece. 下 , the temperature measuring couple measures the temperature T in the middle of the workpiece 中 ; S53: Determine the upper temperature T of the workpiece 上 , Temperature of the lower part of the workpiece T 下 and the temperature of the middle part of the workpiece T 中 , when T 上min <T 上 <T 上max , T 中min <T 中 <T 中max And T 下min <T 下 <T 下max When the temperature of the upper part of the workpiece is T 上 >T 上max or T 上 <T 上min When the temperature of the upper part of the fire bar is adjusted, the temperature of the middle part of the workpiece is T 中 >T 中max or T 中 <T 中min When the temperature of the lower part of the workpiece is T 下 >T 下max or T 下 <T 下min When the temperature of the upper part of the fire grate is adjusted; S6: The dimension parameters of the workpiece after rolling are measured by measuring the distance between the telescopic rods of the sliding worktable of the measuring assembly to obtain the dimension of the ring rolled piece.

8. The ring rolling mill measurement method according to claim 7, characterized in that: The dimensional parameters in step S6 include the wall thickness on both sides, the inner diameter, the outer diameter of the workpiece after rolling, and the wall thickness of different areas of the special-shaped rolled piece.

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