阅读说明：本技术 一种轧环机轴向定心辊的位置控制系统及方法 (Position control system and method for axial centering roller of ring rolling machine ) 是由 曹文胜 付永涛 柴星 张宗元 王斌 于 2021-06-26 设计创作，主要内容包括：本发明提供了一种轧环机轴向定心辊的位置控制系统及方法；系统包括：处理单元、信号接收模块；所述信号接收模块用于将接收的数据传输给所述处理单元；所述处理单元用于获取信号接收模块的数据并运行计算机程序。本发明还涉及前述系统的控制方法。本发明在环形锻件轧制过程中,采用轴向锥辊当前位置与轴向锥辊轧制最小起始位置的实时距离和外径检测装置与环形锻件外径实时距离,可以准确的计算出定心辊的实时行程,并通过液压伺服控制系统控制轴向定心辊位置；在环形锻件轧制过程中,限制环形锻件的跳动和摆动现象,减少非对称轧制引起的偏移力并降低环形锻件椭圆度,为环形锻件的实时直径检测和圆度提供依据,为轧制过程平稳进行提供了依据。(The invention provides a position control system and a method for an axial centering roller of a ring rolling machine; the system comprises: the device comprises a processing unit and a signal receiving module; the signal receiving module is used for transmitting the received data to the processing unit; the processing unit is used for acquiring data of the signal receiving module and operating a computer program. The invention also relates to a control method of the system. In the process of rolling the annular forging piece, the real-time distance between the current position of the axial conical roller and the minimum initial position of the rolling of the axial conical roller and the real-time distance between the outer diameter detection device and the outer diameter of the annular forging piece are adopted, so that the real-time stroke of the centering roller can be accurately calculated, and the position of the axial centering roller is controlled by a hydraulic servo control system; in the process of rolling the annular forge piece, the jumping and swinging phenomena of the annular forge piece are limited, the offset force caused by asymmetric rolling is reduced, the ovality of the annular forge piece is reduced, a basis is provided for real-time diameter detection and roundness of the annular forge piece, and a basis is provided for the smooth operation of the rolling process.)

1. A position control system of an axial centering roller of a ring rolling mill is characterized by comprising: the device comprises a processing unit and a signal receiving module;

the signal receiving module is used for transmitting the received data to the processing unit;

the processing unit is used for acquiring data of the signal receiving module and operating a computer program.

2. The system for controlling the position of an axial centering roll of a ring rolling mill of claim 1, further comprising a displacement sensor for feeding back and measuring feed data.

3. A method of a system for controlling the position of the axial centring rollers of a ring rolling mill as claimed in claim 1, characterized in that it comprises the following steps:

step 100, obtaining the horizontal distance from the rear end face of the rolling starting point of the axial conical roll to the excircle of the main roll and the initial data of the maximum outer diameter distance between the outer diameter detection device and the axial conical roll;

200, obtaining initial data of the center of the initial point of the axial centering roller;

300, acquiring detection data of the distance between the real-time position of the axial conical roller and the minimum initial position of the axial conical roller in rolling;

step 400, obtaining real-time data of the outer diameter distance between the outer diameter detection device and the outer diameter of the annular forging;

500, acquiring target data of a real-time feeding stroke of the axial holding roller;

step 600, obtaining the real-time position of the axial centering roller.

4. The method of the position control system of the axial centering roll of the ring rolling mill as claimed in claim 3, characterized in that the method is to control the centering roll feeding position data by a hydraulic servo control system according to the feeding amount data measured and fed back by a displacement sensor.

5. The method of a position control system for an axial centering roll of a ring rolling mill as set forth in claim 4, characterized in that said hydraulic servo control system is comprised of a hydraulic pump, a servo valve and a hydraulic cylinder.

6. The method for controlling the position of the axial centering roll of the ring rolling mill according to claim 3, wherein in the step 400, the real-time data of the distance between the outer diameter detection device and the outer diameter of the annular forging is obtained in a plurality of groups; the distance measuring device is provided with a plurality of distance measuring devices, and the measuring end of each distance measuring device is opposite to a measuring point on the workpiece.

Technical Field

The invention belongs to the field of metal rolling; in particular to a position control system and a method for an axial centering roller of a ring rolling machine.

Background

In the process of rolling the annular forging, the annular forging is locally stressed, contact areas are asymmetric, severe jumping and swinging are easily generated, the annular forging generates offset force, and the geometric dimension of the annular forging is seriously deformed during rolling.

In order to control the jumping and swinging phenomena in the rolling process of the annular forge piece, reduce the offset force caused by asymmetric rolling and carry out rounding on the annular forge piece, a centering roller system is additionally arranged. The centering roller is in contact with the annular forging and rotates in a driven mode under the action of friction force. Along with the diameter expansion of the annular forging, the centering roller moves backwards under the action of the hydraulic cylinder. Meanwhile, the centering roller force generated by the constant hydraulic pressure can prevent the annular forging from jumping and swinging, and the offset force generated in the asymmetric rolling process of the annular forging is reduced. The position of the axial centering roller is very critical to real-time diameter detection and roundness of the annular forging in the rolling process.

In the prior art, a method for conveniently and accurately determining the position control of an axial centering roller in the rolling process of a ring rolling mill for a machined part does not exist.

Disclosure of Invention

The invention aims to provide a position control system and method for an axial centering roller of a ring rolling machine.

The invention is realized by the following technical scheme:

the invention relates to a position control system of an axial centering roller of a ring rolling mill, which comprises: the device comprises a processing unit and a signal receiving module;

the signal receiving module is used for transmitting the received data to the processing unit;

the processing unit is used for acquiring data of the signal receiving module and operating a computer program.

The position control system of the axial centering roller of the ring rolling machine further comprises a displacement sensor, and the displacement sensor is used for feeding back and measuring feeding data.

The invention also relates to a method for the position control system of the axial centering roller of the ring rolling machine, which comprises the following steps:

step 100, acquiring initial data of the horizontal distance from the rear end face of the rolling starting point of the axial conical roll to the excircle of the main roll and initial data of the maximum outer diameter distance between the outer diameter detection device and the axial conical roll;

step 200, obtaining initial data of the center of the starting point of the axial centering roller. The initial data of the axial centering roller starting point center are the horizontal distance from the axial centering roller starting point center to the intersection point of the linear motion to the rolling central line, the vertical distance from the axial centering roller starting point center to the intersection point of the linear motion to the rolling central line, the horizontal distance from the axial centering roller starting point center to the rear end face of the axial conical roller and the radius of the excircle of the centering roller;

and 300, acquiring detection data of the distance between the real-time position of the axial conical roller and the minimum rolling starting position of the axial conical roller. The real-time position of the axial conical roller is the position where the axial conical roller retreats in real time along with the increase of the diameter of the rolled ring in the rolling process. The minimum initial position of the axial conical roller is the limit position of the axial conical roller moving to the radial roller;

the step 300 is followed by: and the data of the real-time position of the axial conical roller and the minimum initial position distance of the axial conical roller rolling are detected, and the data of the relative position of the real-time position of the axial conical roller device and the minimum initial position of the axial conical roller rolling are detected by a displacement detection device arranged on the axial conical roller device.

Wherein: and a displacement sensor is arranged in the position control system of the axial centering roller and is used for measuring feeding amount data of the axial centering roller.

The position control system of the axial centering roller is provided with a driving oil cylinder, and the displacement sensor measures the feeding amount of the output end of the driving oil cylinder;

the measuring direction of the distance measuring device is the same as the moving direction of the axial conical roller device.

Step 400, obtaining real-time data of the outer diameter distance between the outer diameter detection device and the outer diameter of the annular forging;

the distance measuring devices are specifically a first distance measuring device, a second distance measuring device and a third distance measuring device, and the first distance measuring device, the second distance measuring device and the third distance measuring device sequentially measure the distance between the outer diameter detection device and the outer diameter of the annular forging along the axial direction of the workpiece.

500, obtaining target data of a real-time feeding stroke of the axial centering roller through initial data of a horizontal distance from the rear end face of a rolling starting point of the axial conical roller to an excircle of a main roller, a maximum outer diameter distance between an outer diameter detection device and the axial conical roller, initial data of a center of the rolling starting point of the axial centering roller, data of a distance between a real-time position of the axial conical roller and a minimum rolling starting position of the axial conical roller and real-time data of an outer diameter distance between the outer diameter detection device and an annular forging;

step 600, obtaining the real-time position of the axial centering roller.

The step 600 further comprises:

the real-time position of the axial centering roller is obtained by comparing the obtained real-time feeding target data of the axial centering roller with the feedback feeding data of the displacement sensor, and the hydraulic servo control system drives the oil cylinder of the axial centering roller to control the position control system of the axial centering roller to move to the target feeding position.

The hydraulic servo control system consists of a hydraulic pump, a servo valve and a hydraulic cylinder.

The position control system of the axial centering roller is provided with a displacement sensor, and the axial centering roller position control device feeds back feeding data through the displacement sensor.

The position control system of the axial centering roller is provided with a driving oil cylinder, and the displacement sensor measures and feeds back the feeding amount of the output end of the driving oil cylinder.

Preferably, in the step 400, there are multiple sets of data of the outer diameter distance between the outer diameter detection device and the outer diameter of the annular forging, wherein there are multiple distance measurement devices, and the measurement end of each distance measurement device faces a measurement point on the workpiece.

The invention has the following advantages:

in the process of rolling the annular forging, the real-time distance between the current position of the axial conical roller and the minimum initial position of the rolling of the axial conical roller and the real-time distance between the outer diameter detection device and the outer diameter of the annular forging are adopted, the real-time stroke of the centering roller can be accurately calculated, and the position of the axial centering roller is controlled through a hydraulic servo control system. Finally, in the process of rolling the annular forging, the jumping and swinging phenomena of the annular forging are limited, the offset force caused by asymmetric rolling is reduced, the ovality of the annular forging is reduced, a basis is provided for real-time diameter detection and roundness of the annular forging, and a basis is provided for the smooth rolling process.

Drawings

FIG. 1 is a schematic view of the overall structure of a radial-axial ring rolling mill to which the present invention is applied for controlling the position of an axial centering roller during rolling;

FIG. 2 is a top view of a radial-axial ring rolling mill to which the present invention is applied for controlling the position of an axial centering roller during rolling;

FIG. 3 is a block diagram of the structure of the position control of the axial centering roller in the rolling process of the ring rolling mill of the present invention;

FIG. 4 is a diagram showing the technical parameter indexes used for calculation in the position control of the axial centering roller in the rolling process of the ring rolling mill.

Detailed Description

The present invention will be described in detail with reference to specific examples. It should be noted that the following examples are only illustrative of the present invention, but the scope of the present invention is not limited to the following examples.

The radial-axial ring rolling mill applied to the position control of the axial centering roller in the rolling process of the ring rolling mill comprises the following steps: see fig. 1 and 2 for illustration: the rolling device comprises a radial rolling main roller 1, a radial rolling core roller 2, an axial rolling conical roller 3, an axial rolling centering roller 4, an axial rolling centering roller 5, an axial rolling centering roller oil cylinder 6, an outer diameter detection device 7 and an axial rolling moving rack 8. In the process of rolling the annular forge piece, the core roller 2 feeds and approaches the main roller 1 and the axial roller 3 feeds, the size of the annular forge piece gradually increases, the axial rolling moving rack 8 retreats gradually under the action of the axial rolling moving rack feeding oil cylinder 9 according to the increasing trend of the annular forge piece under the control of a program, and in the process of continuously increasing the annular forge piece, the positions of the axial rolling centering rollers 4 and 5 retreat gradually under the action of the axial rolling centering roller oil cylinder 6 under the control of the program.

In the position control of the axial centering roller in the rolling process of the ring rolling mill, the identification chart of each technical parameter mark for calculation is shown in figure 4: the individual letter meanings are as follows:

b is the horizontal distance from the rear end face of the rolling starting point of the axial conical roller to the excircle of the main roller;

c is the distance between the position of the axial conical roller and the minimum initial position of the axial conical roller;

f is the maximum outer diameter distance between the outer diameter detection device and the axial conical roller;

h is the distance between the outer diameter detection device and the outer diameter of the annular forging;

v is the horizontal distance between the center of the starting point of the axial centering roller and the intersection point of the linear motion of the axial centering roller and the rolling center line;

w is the vertical distance between the center of the starting point of the axial centering roller and the rolling center line;

z is the stroke of the centering roller oil cylinder;

j is the horizontal distance from the center of the starting point of the axial centering roller to the rear end face of the axial conical roller;

R₆the radius of the outer circle of the axial centering roller;

example 1

The embodiment relates to a method for controlling the position of an axial centering roller in the rolling process of a ring rolling mill, which is shown in a figure 3: the method is used for limiting the jumping and swinging phenomena of the annular forging in the rolling process of the ring rolling mill, reducing the offset force caused by asymmetric rolling and reducing the ovality of the annular forging, and comprises the following specific steps:

step 100, obtaining initial data B of the horizontal distance from the rear end face of the rolling initial point of the axial conical roll to the excircle of the main roll and the maximum outer diameter distance F between the outer diameter detection device and the axial conical roll;

step 200, obtaining initial data of the center of the starting point of the axial centering roller. The initial data of the axial centering roller starting point center are a horizontal distance V from the axial centering roller starting point center to the intersection point of the linear motion to the rolling central line, a vertical distance W from the axial roller starting point center to the intersection point of the linear motion to the rolling central line and a horizontal distance J from the axial centering roller starting point center to the rear end face of the axial conical roller;

300, obtaining detection data C of the distance between the real-time position of the axial conical roller and the minimum rolling starting position of the axial conical roller, wherein the minimum rolling starting position of the axial conical roller is the limit position of the axial conical roller moving to the radial roller;

step 400, obtaining real-time data H of the distance between the outer diameter detection device and the outer diameter of the annular forging;

step 500, obtaining real-time feeding travel data Z of the axial centering roller through initial data of a horizontal distance from the rear end face of the rolling starting point of the axial conical roller to the excircle of the main roller, a maximum outer diameter distance between an outer diameter detection device and the axial conical roller, initial data of the center of the starting point of the axial centering roller, data of a distance between the real-time position of the axial conical roller and the minimum rolling starting position of the axial conical roller, real-time data of an outer diameter distance between the outer diameter detection device and an annular forge piece and the radius R6 of the excircle of the axial centering roller.

Step 600, obtaining the real-time position of the axial centering roller.

The formula involved in the above method is as follows:

b is the horizontal distance from the rear end face of the rolling starting point of the axial conical roller to the excircle of the main roller;

c is the distance between the position of the axial conical roller and the minimum initial position of the axial conical roller;

f is the maximum outer diameter distance between the outer diameter detection device and the axial conical roller;

h is the distance between the outer diameter detection device and the outer diameter of the annular forging;

v is the horizontal distance between the center of the starting point of the axial centering roller and the intersection point of the linear motion of the axial centering roller and the rolling center line;

w is the vertical distance between the center of the starting point of the axial centering roller and the rolling center line;

z is the stroke of the centering roller oil cylinder;

j is the horizontal distance from the center of the starting point of the axial centering roller to the rear end face of the axial conical roller;

R₆the radius of the outer circle of the axial centering roller;

the ring rolling mill of the present embodiment is a radial-axial ring rolling mill, which includes a radial rolling section and an axial rolling section. When the axial rolling part is close to or far from the radial rolling part, the feeding amount of the axial rolling conical roller part is measured through a distance sensor inside the axial conical roller part, and the feeding amount is the distance C between the axial conical roller position and the minimum initial position of the axial conical roller rolling.

And the data of the distance between the outer diameter detection device and the outer diameter of the annular forging is the distance between the outer diameter detection device and the annular forging as measured by the distance measuring device and the machined part, and the distance is the outer diameter distance H between the outer diameter detection device and the annular forging.

The initial data B of the horizontal distance from the rear end face of the rolling starting point of the axial conical roll to the excircle of the main roll and the distance F between the outer diameter detection device and the maximum outer diameter of the axial conical roll are constants.

Initial data of axial centering roll start point center. The initial data of the axial centering roller starting point center are that the horizontal distance V from the axial centering roller starting point center to the intersection point of the linear motion to the rolling central line, the vertical distance W from the axial roller starting point center to the intersection point of the linear motion to the rolling central line and the horizontal distance J from the axial centering roller starting point center to the rear end face of the axial conical roller are constants.

Example 2

The axial centering roller device according to the present embodiment has a displacement sensor therein, and the axial centering roller device feeds back feed data thereof by the displacement sensor.

In the above embodiment, when the feeding of the axial centering roller device is obtained, the feeding amount of the axial centering roller device is measured by the displacement sensor in the axial centering roller device, and the displacement sensor finally feeds back the measured feeding amount data to the axial centering roller position control system of the ring rolling machine. And finally, the position control system of the axial centering roller of the ring rolling machine adjusts the real-time feeding stroke of the axial centering roller of the ring rolling machine according to the comparison between the feeding amount feedback data and the target data.

Example 3

The axial centering roller position control related to the embodiment controls the feeding position data of the centering roller through a hydraulic servo control system according to the feeding amount data measured and fed back by a displacement sensor.

In the above embodiment, the hydraulic servo control system controls the displacement feed amount of the axial centering roller by comparing the feedback data of the axial centering roller displacement sensor with the target data.

Example 4

The axial conical roller device related to the embodiment is internally provided with a displacement sensor, and the axial conical roller device measures feeding amount data through the displacement sensor.

In the above embodiment, when the feed amount of the axial conical roll device is obtained, the feed amount of the axial conical roll device is measured by the displacement sensor in the axial conical roll device, and the displacement sensor finally sends the measured feed amount data to the axial centering roll position control system of the ring rolling mill. And finally, calculating the position data of the axial centering roller by the position control system of the axial centering roller of the ring rolling machine according to the feed data and the data of the distance between the outer diameter detection device and the outer diameter of the workpiece.

Example 5

In the method according to this embodiment, in step 400, there are multiple sets of data of the outer diameter distance between the outer diameter detection device and the outer diameter of the annular forging, the distance measurement device has multiple sets, and the measurement end of each distance measurement device faces a measurement point on the workpiece.

In the above embodiment, in actual production, in order to ensure the quality of the workpiece, in one case, a plurality of distance measuring devices may be installed to detect the diameters of the workpiece at different heights, so as to ensure the overall quality of the workpiece.

Example 6

The rolling process axial centring roller position control system of ring rolling mill includes:

the device comprises a processing unit and a signal receiving module;

the signal receiving module is used for transmitting the received data to the processing unit;

the processing unit is used for acquiring data of the signal receiving module and operating a computer program;

when the signal receiving module is implemented in the form of a chip, the signal receiving module is a communication interface for the chip to receive signals or transmit signals from other chips or devices.

The processing unit is a processor or controller and may be a central processing unit, general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array, PLC or other programmable logic device, transistor logic, hardware component, or any combination thereof. Which may implement or perform logical blocks, modules, and circuits. The processor is a combination that performs a computational function, such as a combination comprising one or more microprocessors, a digital signal processor and a microprocessor, or the like.

In the process of rolling the annular forging, the real-time distance between the current position of the axial conical roller and the minimum initial position of the rolling of the axial conical roller and the real-time distance between the outer diameter detection device and the outer diameter of the annular forging are adopted, so that the real-time stroke of the centering roller can be accurately calculated, and the position of the axial centering roller is controlled by a hydraulic servo control system. Finally, in the process of rolling the annular forging, the jumping and swinging phenomena of the annular forging are limited, the offset force caused by asymmetric rolling is reduced, the ovality of the annular forging is reduced, a basis is provided for real-time diameter detection and roundness of the annular forging, and a basis is provided for the smooth rolling process.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.