A straightening roll gap adjusting device and adjusting method
By installing encoders and PLC controllers on the straightening machine, real-time monitoring and automated adjustment of the upper and lower roller angles and pressing amount are achieved, solving the problem of inaccurate adjustment in the existing technology and improving the adjustment accuracy and production efficiency of the straightening machine.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XINING SPECIAL STEEL
- Filing Date
- 2022-06-10
- Publication Date
- 2026-07-31
AI Technical Summary
Existing straightening machines cannot monitor the accurate position and angle of the rollers in real time, and the adjustment accuracy is insufficient. For different specifications of bars, manual judgment is required to determine whether the adjustment is in place, resulting in lower finished product quality.
The system uses an encoder to monitor the angle and pressure of the upper and lower rollers, a PLC controller to precisely control the roller gap adjustment, and a touch screen to display and save parameters in real time, thus achieving automated adjustment.
It improves the adjustment accuracy and operating efficiency of the straightening machine, ensuring the rapid and accurate straightening of bars of different specifications, and enhancing the quality of finished products.
Smart Images
Figure CN114888125B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of straightening machines, and in particular to a roller gap adjustment device and adjustment method for a straightening machine. Background Technology
[0002] Currently, the straightening machine for small bars uses an adjusting motor for pressing and angle adjustment, controlled by a PLC for start and stop, and mechanical limit switches to ensure the extreme positions of the adjusting roller. However, this method has the following drawbacks: it cannot monitor the accurate position and angle of the adjusting roller in real time; the pre-adjustment amount needs to be recalculated for different specifications of bars, and manual judgment is required during the adjustment process to ensure that the adjustment is in place; the adjustment accuracy is insufficient, the deviation is increased, and the quality of the finished product is lower. Summary of the Invention
[0003] To address the shortcomings of existing technologies, this invention provides a roller gap adjustment device and method for a straightening machine, thereby solving the problem of rapid and accurate adjustment of the roller shaft of a straightening machine.
[0004] This invention provides a roller gap adjustment device for a straightening machine, the structure of which includes an upper roller, a lower roller, a height adjustment motor, an angle adjustment motor, a drive motor, an encoder, and a PLC controller. The encoder includes a height encoder and an angle encoder. The upper roller is a passive roller, and is connected to both the height adjustment motor and the angle adjustment motor. The lower roller is an active roller, and is connected to both the drive motor and the angle adjustment motor. A height encoder is installed on the height adjustment motor of the upper roller, an angle encoder is installed on the angle adjustment motor of the upper roller, and an angle encoder is installed on the angle adjustment motor of the lower roller. The height encoder and the angle encoder are connected to the PLC controller, and the PLC controller is connected to both the height adjustment motor and the angle adjustment motor.
[0005] The PLC controller is connected to the height adjustment motor, angle adjustment motor, and drive motor via relays.
[0006] The lower roller consists of three active rollers, which are driven or withdrawn by a transmission motor, and the angle is adjusted by an angle adjustment motor.
[0007] The upper roller consists of six passive rollers, numbered 1, 2, 3, 4, 5, and 6. Rollers 1, 3, and 5 are pressure rollers, used to hold the bar stock. They are driven by the lower rollers for auxiliary transmission. During adjustment, the pressure of the upper rollers is controlled within the range of 1-2 mm, and is not allowed to exceed 2 mm. Rollers 2, 4, and 6 are reverse bending rollers, adjusted according to the principle of "small reverse bending for large bars, large reverse bending for small bars". The reverse bending amount of rollers 2 and 4 should be consistent, while the reverse bending amount of roller 6 should be slightly smaller.
[0008] The PLC controller is connected to a touch screen, which displays the height and angle of the upper and lower rollers in real time. The touch screen can also save the preset size parameters of different specifications of bars, and the saved parameters can be directly selected when straightening different bars.
[0009] A method for adjusting the roller gap adjustment device of a straightening machine: First, determine the actual size of the bar to be straightened. The actual roller height and angle are transmitted in real time to the PLC controller via an encoder. The data can be observed on a touch screen. The PLC controller adjusts the upper roller's pressure amount via the upper roller height adjustment motor, ensuring the pressure amount is slightly greater than the size of the bar to be straightened. The PLC controller then fine-tunes the lower roller drive motor to slowly feed the bar to be straightened into the middle of the straightening roller. Next, adjust the lower roller angle according to the actual roller gap value and different size requirements to ensure maximum contact area with the bar to be straightened. Then, adjust the angle sequentially... Adjust the angles of upper rollers 1, 3, and 5 to achieve full coverage of the contact surface with the bar to be straightened; adjust the pressure of upper rollers 1, 2, 3, 4, 5, and 6 according to the upper roller adjustment requirements, controlling the pressure within the range of 1-2mm, and not exceeding 2mm; remove the bar and correct the die size, the die size of upper rollers 1, 3, and 5 = the size of the bar to be straightened - 1; according to the adjustment principle of upper rollers 2, 4, and 6, large bars have a small reverse bend, small bars have a large reverse bend, and the bar specifications are adjusted to adjust the reverse bend of rollers 2, 4, and 6; after all rollers are adjusted, hydraulically lock the upper rollers and straighten the bar.
[0010] The parameters adjusted each time can be saved, making it convenient to use the adjustment data for bars of the same specifications without having to make repeated adjustments.
[0011] The beneficial effects of this invention are as follows: by adding an encoder to monitor the angle of the upper and lower rollers and the amount of pressure of the upper roller, the PLC controller can achieve precise control; thereby, the angle adjustment motor and the roller gap can be automatically controlled through the angle adjustment motor and the height adjustment motor, improving the accuracy of straightening adjustment, providing production personnel with accurate parameters, improving operating efficiency, and speeding up the production pace. Attached Figure Description
[0012] Figure 1 This is a block diagram of the adjustment structure connection of the present invention;
[0013] Figure 2 This is the electrical schematic diagram for the height adjustment of the present invention;
[0014] Figure 3 Electrical schematic diagram for angle adjustment of the present invention. Detailed Implementation
[0015] Example 1
[0016] like Figure 1-3As shown, the present invention provides: a roller gap adjustment device for a straightening machine, the structure of which includes an upper roller, a lower roller, a height adjustment motor, an angle adjustment motor, a drive motor, an encoder, and a PLC controller. The encoder includes a height encoder and an angle encoder. The upper roller is a passive roller, and the upper roller is connected to both the height adjustment motor and the angle adjustment motor. The lower roller is an active roller, and the lower roller is connected to both the drive motor and the angle adjustment motor. A height encoder is installed on the height adjustment motor of the upper roller, an angle encoder is installed on the angle adjustment motor of the upper roller, and an angle encoder is installed on the angle adjustment motor of the lower roller. The height encoder and the angle encoder are connected to the PLC controller, and the PLC controller is connected to both the height adjustment motor and the angle adjustment motor.
[0017] The PLC controller is connected to the height adjustment motor, angle adjustment motor, and drive motor via relays.
[0018] The processing range of the straightening machine is The straightening principle is reverse bending straightening. The roller layout of the straightening machine is six on top and three on the bottom. All three lower rollers are main drive rollers, and the six upper rollers are passive rollers.
[0019] The lower roller consists of three active rollers, which are driven or withdrawn by a transmission motor, and the angle is adjusted by an angle adjustment motor.
[0020] The upper roller consists of six passive rollers, designated as rollers 1, 2, 3, 4, 5, and 6. Rollers 1, 3, and 5 are pressure rollers, used to hold the bar stock. They are driven by the lower rollers for auxiliary transmission. During adjustment, the pressure of the upper rollers is controlled within the range of 1-2 mm, and is not allowed to exceed 2 mm. Rollers 2, 4, and 6 are reverse bending rollers, adjusted according to the principle of "smaller reverse bending for larger bars, larger reverse bending for smaller bars." The reverse bending amount of rollers 2 and 4 should be consistent, while the reverse bending amount of roller 6 should be slightly smaller.
[0021] The PLC controller is connected to a touch screen, which displays the height and angle of the upper and lower rollers in real time. The touch screen can also save the preset size parameters of different specifications of bars, and the saved parameters can be directly selected when straightening different bars.
[0022] A method for adjusting the roller gap adjustment device of a straightening machine:
[0023] First, determine the actual dimensions of the bar stock to be straightened. The actual roller height and angle are transmitted in real-time to the PLC controller via an encoder. This data can be viewed on a touchscreen display. The PLC controller adjusts the upper roller's pressure using the upper roller height adjustment motor, ensuring the pressure is slightly greater than the bar stock's dimensions. The PLC controller then fine-tunes the lower roller drive motor to slowly feed the bar stock into the middle of the straightening rollers. Next, adjust the lower roller angle according to the actual roller gap requirements of different specifications to maximize the contact area with the bar stock. Then, adjust the 1st, 3rd, and 5th roller angles sequentially. To achieve full coverage of the contact surface with the bar to be straightened, adjust the pressure of the upper rollers 1, 2, 3, 4, 5, and 6 according to the upper roller adjustment requirements. The pressure of the upper rollers should be controlled within the range of 1-2mm, and should not exceed 2mm. Remove the bar and correct the die size. The die size of the upper rollers 1, 3, and 5 should be equal to the size of the bar to be straightened - 1. According to the adjustment principle of the upper rollers 2, 4, and 6, adjust the bending amount of rollers 2, 4, and 6 according to the bar specifications, with larger bars having a smaller reverse bend and smaller bars having a larger reverse bend. After all rollers are adjusted, hydraulically lock the upper rollers and straighten the bar.
[0024] The first pair of inlet pinch rollers are for receiving and conveying materials. The pressure is based on the ability to convey the rollers. Once the bar is bitten, the pinch rollers must immediately return to ensure that the rollers are not damaged by the straightened bar. The soft limit values of the straightener program are set as follows: roller gap adjustment range 0-120mm, upper roller angle adjustment range 22-46 degrees, and lower roller angle adjustment range 28.5-45 degrees. Adjustment commands cannot be executed when the values are outside the range.
Claims
1. A method of adjusting a roll gap adjustment device of a leveller, characterized in that: The adjustment device includes an upper roller, a lower roller, a height adjustment motor, an angle adjustment motor, a drive motor, an encoder, and a PLC controller. The encoder includes a height encoder and an angle encoder. The upper roller is a passive roller, connected to both the height adjustment motor and the angle adjustment motor. The lower roller is an active roller, connected to both the drive motor and the angle adjustment motor. A height encoder, an angle encoder, and an angle encoder are all mounted on the height adjustment motors of both the upper and lower rollers. The height encoder and the angle encoder are connected to the PLC controller, which is connected to the height adjustment motor. The system includes an angle adjustment motor and a drive motor. The lower rollers consist of three active rollers, driven forward and backward by a drive motor, and their angle is adjusted by an angle adjustment motor. The upper rollers consist of six passive rollers, designated as rollers 1, 2, 3, 4, 5, and 6. Rollers 1, 3, and 5 are pressure rollers, with their pressure reduction controlled at 1-2 mm during adjustment. Rollers 2, 4, and 6 are reverse bending rollers, adjusted according to the principle of "larger rollers, smaller reverse bending; smaller rollers, larger reverse bending." Rollers 2 and 4 should have consistent reverse bending amounts, while roller 6 should have slightly smaller reverse bending amounts. The PLC controller is connected to a touchscreen display, which displays the real-time height and angle of the upper and lower rollers. The adjustment method is as follows: First, determine the actual size of the bar stock to be straightened. The actual roller height and angle are transmitted to the PLC controller in real time via an encoder. The data can be observed through the touch screen. The PLC controller adjusts the upper roller's pressure by adjusting the height of the upper roller, making the roller gap slightly larger than the size of the bar stock to be straightened. The PLC controller then fine-tunes the lower roller's drive motor to slowly feed the bar stock into the middle of the straightening roller. Next, adjust the lower roller's angle to maximize the contact area with the bar stock. Then, adjust the angles of upper rollers 1, 3, and 5 in sequence to achieve full coverage of the contact area with the bar stock as much as possible. Adjust the pressure of upper rollers 1, 2, 3, 4, 5, and 6, remove the bar stock, and correct the die size. The die size of upper rollers 1, 3, and 5 = bar stock size - 1mm. Adjust the reverse bending amount of rollers 2, 4, and 6 according to the adjustment principle of upper rollers 2, 4, and 6. After all rollers are adjusted, hydraulically lock the upper rollers and straighten the bar stock.
2. The method of adjusting a roll gap adjustment device of a straightening machine according to claim 1, characterized in that: Each adjustment parameter is saved, making it convenient to use the adjustment data for bars of the same specifications without having to make repeated adjustments.