A new type of electric pressing position control device for plate and strip rolling mill
By using slide rod, steel ball and annular groove combined with displacement sensor and photoelectric switch in the electric pressure device of plate and strip rolling mill, the problems of complex structure and poor stability of the induction piece in the prior art are solved, and the downshot screws are realized Accurate control and stable movement improve production efficiency.
Patent Information
- Application Number
- CN202011373670.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-11-30
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2040-11-30
AI Technical Summary
The structure of the induction parts of the existing plate and strip rolling mill is too complicated and has poor motion stability, which leads to the wear, dislocation and disengagement of the downward screws, affecting production efficiency.
The design of a slide rod and a displacement sensor combined with a photoelectric switch is used to reduce friction through the steel ball and annular groove on the slide rod, and the springs are used to maintain the close contact between the slide rod and the depressed screw, ensuring stable movement, and recording the screw stroke and the displacement sensor are used to record the Optoelectronic switch alarm achieves precise position control.
It improves the accuracy and stability of the position control of the downward screw, reduces the risk of steel ball wear and disengagement, and improves the operating reliability and production efficiency of the equipment.
Smart Images
Figure CN112570461B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of rolling mill devices, and in particular relates to a novel electric pressing down position control device for a plate and strip rolling mill. Background Art
[0002] In the four-roller cold-rolled strip mill, electric pressing is the most commonly used upper roll adjustment device, which usually includes: motor, reducer, brake, pressing screw, pressing nut, pressing position indicator, limit switch device, spherical pad, and pressure gauge, etc. Electric pressing can move the upper roll position, adjust the roll gap size, and can also press down separately to keep the pressing rolls parallel, so as to control the plate thickness well.
[0003] The final link of the electric screw-down transmission is the screw-down screw connected to the screw-down head. The motion state of the screw-down screw is a compound motion of rotation and vertical motion. To ensure the accuracy of the roller gap adjustment, the screw-down screw must stop accurately at the required position. It is also required to point out the roller's screw-down position at any time during the adjustment process. In order to accurately adjust the position of the screw-down head, the position of the screw-down screw must be strictly monitored.
[0004] The first monitoring method is to monitor the pressing stroke through a displacement sensor, and the second is to use a photoelectric switch to alarm the limit position. In the existing plate thickness control monitoring device, the upper space of the pressing screw is small; the sensor structure is too complicated, the movement stability is poor, and the lower steel ball is easy to wear, dislocate, and fall out; problems are prone to occur during the operation of the equipment, causing shutdown and affecting production efficiency. Summary of the invention
[0005] The purpose of the present invention is to provide a new type of electric pressing position control device for a plate and strip rolling mill, and to improve and optimize the mechanical structure of the control element.
[0006] The technical solution adopted by the present invention is a novel electric pressing position control device for a plate and strip rolling mill, comprising a slide bar, one end of which is fixedly connected to a signal head, a screw passes through the signal head, and the screw is fixed to the slide bar;
[0007] The other end of the slide rod is provided with a thread, and the slide rod is connected with a nut and a sleeve in sequence through the thread, a concave pad is fixed in the sleeve, the concave pad is located below the slide rod, and a steel ball is installed in the concave pad;
[0008] One end of the slide bar connected to the signal head passes through a shaft sleeve, and a spring is sleeved on the slide bar, and the spring is located between the shaft sleeve and the nut.
[0009] The shaft sleeve is fixed on a plate-shaped bracket, a displacement sensor is installed on the bracket, the displacement sensor passes through the bracket and is inserted into the deep hole in the center of the pressing screw, and the displacement sensor and the shaft sleeve are symmetrically arranged along the center line of the bracket;
[0010] A protective cover is installed on the edge of the bracket through a second screw, and a washer is placed under the second screw;
[0011] An angle steel is also fixedly installed on the bracket, and a proximity switch is fixedly connected to each end of the angle steel. The two proximity switches and the displacement sensor pass through the small cover through cables. The small cover is fixed to the protective cover by a third screw, and a gasket is placed under the third screw. A ventilation cover is also fixedly installed on the protective cover.
[0012] The pressing screw is circular when viewed from above, and its circumference is spline-shaped. An annular guide groove is opened on the end surface, and the annular guide groove is arranged in a concentric circle shape.
[0013] The guard cover is on the upper surface of the bracket, and the angle steel and the displacement sensor are located inside the guard cover.
[0014] The present invention is to accurately control the pressing position of the electric pressing of the rolling mill, and finally effectively control the thickness of the plate and strip, and accurately achieves this by using a displacement sensor to record the stroke of the pressing screw and using a photoelectric switch to alarm the extreme position of the pressing screw. The present invention has a simple structure, a novel idea, and a high application value. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a side view of the structure of the electric control part of the present invention;
[0016] Figure 2 It is a top view of the structure of the electric control part of the present invention;
[0017] Figure 3 This is a front view of the structure of the electric control part of the present invention;
[0018] Figure 4 is a top view of the pressing screw of the present invention;
[0019] Figure 5 It is a structural diagram of the pressing part of the present invention;
[0020] In the figure, 1. bracket, 2. signal head, 3. first screw, 4. slide rod, 5. bushing, 6. angle steel, 7. nut, 8. spring, 9. concave pad, 10. sleeve, 11. steel ball, 12. second screw, 13. washer, 14. protective cover, 15. small cover, 16. ventilation cover, 17. proximity switch, 18. displacement sensor, 19. press-down screw, 20. third screw. DETAILED DESCRIPTION
[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
[0022] like Figure 1 As shown, the present invention is a novel electric pressing position control device for a plate and strip rolling mill, comprising a slide bar 4, one end of which is fixedly connected to a signal head 2, a screw 3 passes through the signal head 2, and the screw 3 is fixed to the slide bar 4;
[0023] The other end surface of the slide rod 4 is provided with a thread, and the slide rod 4 is sequentially connected with a nut 7 and a sleeve 10 through the thread, and a concave pad 9 is fixed in the sleeve 10, and the concave pad 9 is located below the slide rod 4, and a steel ball 11 is installed in the concave pad 9;
[0024] One end of the slide bar 4 connected to the signal head 2 passes through a shaft sleeve 5 , and a spring 8 is sleeved on the slide bar 4 , and the spring 8 is located between the shaft sleeve 5 and the nut 7 .
[0025] like Figure 1 , Figure 2 As shown, the sleeve 5 is fixed on a plate-shaped bracket 1, and a displacement sensor 18 is installed on the bracket 1. The displacement sensor 18 passes through the bracket 1 and is inserted into the deep hole in the center of the pressing screw 19. The displacement sensor 18 and the sleeve 5 are symmetrically arranged along the center line of the bracket 1;
[0026] like Figure 3 As shown, a shield 14 is installed on the edge of the bracket 1 through a second screw 12, and a washer 13 is placed under the second screw 12;
[0027] An angle steel 6 is also fixedly installed on the bracket 1, and a proximity switch 17 is fixedly connected to each end of the angle steel 6. The two proximity switches 17 and the displacement sensor 18 pass through the small cover 15 through cables. The small cover 15 is fixed to the protective cover 14 by a third screw 20, and a gasket is placed under the third screw 20. A ventilation cover 16 is also fixedly installed on the protective cover 14.
[0028] like Figure 4 The pressing screw 19 shown is circular when viewed from above, and its circumference is spline-shaped. An annular guide groove is opened on the end surface, and the annular guide groove is arranged in a concentric circle shape.
[0029] like Figure 3 As shown, the shield 14 covers the upper surface of the bracket 1 , and the angle steel 6 and the displacement sensor 18 are located inside the shield 14 .
[0030] The workflow of the present invention is as follows Figure 5As shown, it includes a displacement sensor 18, which is installed on the bracket 1 and then inserted into the deep hole in the center of the pressing screw 19. When the pressing screw 19 moves up and down, the magnetic ring of the displacement sensor 18 records the movement of the pressing screw 19 to achieve the control of the movement. The upper part of the slide bar 4 is engaged with the signal head 2 by the first screw 3, and the lower part is connected with the sleeve 10 in a threaded manner and fastened with a nut 7 to prevent loosening. The concave pad 9 is pressed under the slide bar 4. After the concave pad 9 and the sleeve 10 are installed, a spherical space is formed. A steel ball 11 is installed in the spherical space. During assembly, a certain amount of grease is added to the spherical space to ensure that the steel ball can roll flexibly. A spring is installed in the middle of the slide bar 4, and a spherical annular groove is provided on the upper end surface of the pressing screw 19. The shield 14 protects the electrical components and the lifting part, and the vent hood 16 has a ventilation and dustproof function. The angle steel 6 is used to fix two proximity switches.
[0031] The working principle of the component of the present invention is that when the pressing screw rises, the annular groove on the upper part of the pressing screw presses against the bottom of the steel ball, the spring is compressed, and the slide rod device rises smoothly along the guide sleeve. The signal head at the upper end of the slide rod passes through the upper and lower proximity switches in turn, approaches the proximity switches and issues an alarm at the highest limit position and the lowest limit position respectively. When the pressing screw moves downward, under the rebound effect of the spring, the entire slide rod device falls together with the pressing screw and issues an alarm when it falls to the lowest point. In this structure, the spring can keep the entire slide rod device in close contact with the pressing screw, so that the slide rod device can maintain continuous and stable movement without causing signal transmission errors. In addition, a spherical concave annular groove is designed on the upper end surface of the pressing screw (see attached Figure 3 The enlarged image) is also very important. During the movement of the slide bar, since the push-down screw is still rotating during the vertical movement, the steel ball at the lower end of the slide bar and the contact surface of the push-down screw will produce friction in multiple directions, which will seriously damage the steel ball and may even cause the steel ball to fall out, affecting the work. With this annular groove, the movement trajectory of the steel ball is controlled within a certain range and is not easy to fall out. In addition, the high surface roughness of the annular groove and the lubrication of the lubricant greatly reduce the wear of the steel ball, thereby better ensuring the good working condition of the slide bar device, and then ensuring the normal and stable transmission of the signal.
[0032] One of the structural features of the present invention is the use of springs, and the second feature is that the steel ball at the bottom of the lifting rod is always in the annular groove at the end of the pressing screw. This feature can reduce the height of the internal space of the pressing device and reduce the manufacturing cost of the box cover. At the same time, it can make the lifting part move stably and send signals accurately. This structure has been used many times in similar equipment, has high working efficiency, is not easy to damage, has obvious control effect, and has extremely high promotion value.
Claims
1. An electric pressing position control device for a plate and strip rolling mill, It is characterized in that It comprises a slide rod (4), one end of which is fixedly connected to a signal head (2), a screw (3) passes through the signal head (2), and the screw (3) is fixed on the slide rod (4); The other end surface of the slide rod (4) is provided with a thread, and the slide rod (4) is connected to a nut (7) and a sleeve (10) in sequence through the thread, and a concave pad (9) is fixed inside the sleeve (10), and the concave pad (9) is located below the slide rod (4), and a steel ball (11) is installed inside the concave pad (9); One end of the slide rod (4) connected to the signal head (2) passes through a shaft sleeve (5), and a spring (8) is sleeved on the slide rod (4), and the spring (8) is located between the shaft sleeve (5) and the nut (7); The shaft sleeve (5) is fixed on a plate-shaped bracket (1), and a displacement sensor (18) is installed on the bracket (1). The displacement sensor (18) passes through the bracket (1) and is inserted into a deep hole in the center of a pressing screw (19). The displacement sensor (18) and the shaft sleeve (5) are symmetrically arranged along the center line of the bracket (1); A protective cover (14) is mounted on the edge of the bracket (1) via a second screw (12), and a washer (13) is placed under the second screw (12); An angle steel (6) is also fixedly mounted on the bracket (1), and a proximity switch (17) is fixedly mounted on each end of the angle steel (6). The two proximity switches (17) and the displacement sensor (18) are both connected through a small cover (15) via a cable. The small cover (15) is fixed to the shield (14) via a third screw (20), and a washer is provided under the third screw (20). A ventilation cover (16) is also fixedly mounted on the shield (14); The signal head (2) at the upper end of the slide bar (4) passes through the upper and lower proximity switches (17) in sequence, approaches the proximity switches (17) and issues an alarm at the upper limit position and the lower limit position respectively.
2. The electric pressing position control device for a plate and strip rolling mill according to claim 1, It is characterized in that The pressing screw (19) is circular when viewed from above, has a spline-shaped circumference, and has an annular guide groove on its end surface.
3. The electric pressing position control device for a plate and strip rolling mill according to claim 1, It is characterized in that The protective cover (14) covers the upper surface of the bracket (1), and the angle steel (6) and the displacement sensor (18) are located inside the protective cover (14).