Offline detection device and method for dynamic hole profile and roll gap of sizing mill roll stand

Abstract

The present invention discloses an off-line detection device and method for the dynamic hole profile and roller gap of a sizing machine roll frame. The device is provided with a hoisting station and a detection frame at both ends of a base, a detection station is provided in the detection frame, a driving motor of a translation mechanism is provided on one side of the detection frame, and a conveyor chain is laid on the top surface of the base; a three-roller driving mechanism is provided at intervals on the detection frame, a light source and a linear and rotary motion mechanism are provided on one side of the detection frame, and a camera is provided on the linear and rotary motion mechanism. The method moves the roller frame of the sizing machine to be inspected to the detection station through the hoisting station and the translation mechanism, and the three-roller driving mechanism clamps and drives the three rollers in the roll frame to rotate synchronously at a set speed; the camera detection position is set and the roller profile is photographed, and the dynamic hole profile and roller gap of the roll frame are obtained according to the radial variation of the roller profile and the camera position. The device and method improve the accuracy and precision of the detection, reasonably determine the roller repair process, reduce the repair amount, reduce the roller consumption, and ensure the product quality.

Description

Technical Field

[0001] The invention relates to the field of detection technology, and in particular to an off-line detection device and method for dynamic hole profile and roll gap of a sizing machine roll stand. Background Art

[0002] The sizing mill is one of the main rolling tools in the production of hot-rolled seamless steel pipes. It can reduce and sizing the rough pipes processed by the pipe threading machine under tension to produce finished steel pipes of required specifications. At present, most sizing mills use three-roll tension sizing mills. Three rollers with an angle of 120 degrees are installed on the frame. The diameter of the steel pipe is reduced by using the hole formed by the combination of the three rollers. In actual production, the shape and dimensional accuracy of the rollers and the size of the gap between the rollers have a direct relationship with the shape, dimensional accuracy, surface finish and the presence of blue lines of the steel pipe after the diameter reduction.

[0003] In production, if the roller profile of the tension sizing machine roll stand to be repaired after use is dynamically detected, the roller profile obtained after the detection can directly determine the roller profile repair amount according to the repair process, greatly reducing the roller consumption. At the same time, the gap between the rollers can also be detected in advance to find out whether the edge of the roll is damaged and whether the roller stand bearing is failed; if the roller profile and the gap between the rollers of the tension sizing machine roll stand after processing or repair are detected, it can also be determined whether the roller stand hole shape and the roller gap gap are qualified, avoiding the production of defective products due to roller profile or roller gap problems.

[0004] Chinese patent document CN103383224A discloses a pilger roll hole detection device and detection method, which measures the basic data of the roll, installs and adjusts the detection device on the roll body, measures the parameter values ​​of each part of the roll hole section, and calculates and judges the error value, so as to realize the full-size quantitative detection of the pilger roll. However, the device and method cannot detect the dynamic hole of the roll frame and the roll gap of the three-roll tension sizing mill. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an off-line detection device and method for the dynamic hole profile and roll gap of a sizing machine roll stand. The device and method realize the off-line detection of the dynamic hole profile and roll gap of the three-roll tension sizing machine roll stand, improve the accuracy and precision of the detection, ensure the reliability and traceability of the data, thereby determining the repair process of the roll profile, reducing the repair amount, reducing roll consumption, and avoiding the generation of defective products and defective products.

[0006] In order to solve the above technical problems, the sizing machine roller frame dynamic hole type and roller gap offline detection device of the present invention includes a base, a hoisting station, a detection frame, a translation mechanism, a three-roller driving mechanism, a light source, a camera and a linear and rotational motion mechanism. The hoisting station and the detection frame are respectively arranged at the two ends of the top surface of the base, and the base is provided with a detection station in the detection frame. The translation mechanism includes a driving motor and a conveying chain. The driving motor is arranged on the end surface of the base on one side of the detection frame. The conveying chain is laid on the top surface of the base and extends from the hoisting station to the detection station. The driving motor drives the conveying chain to move. The three-roller driving mechanism is arranged on the detection frame and is arranged at an angle of 120 degrees. The light source and the linear and rotational motion mechanism are arranged on one side of the detection frame. The camera is arranged on the linear and rotational motion mechanism and is driven by the linear and rotational motion mechanism to perform linear and rotational movements.

[0007] Furthermore, the three-roller driving mechanism includes an oil cylinder, a servo motor, a reduction box and an arc gear rod, the servo motor is connected to the arc gear rod via the reduction box, the oil cylinder is arranged in the servo motor housing and the driving rod is connected to the arc gear rod.

[0008] Furthermore, the linear and rotational motion mechanism includes a sliding plate, a vertical pole, a slider, a rotating disk, a magnetic scale and an encoder; the sliding plate is arranged on one side of the detection frame through a sliding groove and a lead screw and a stepping motor are used to drive the sliding plate to move; the rotating disk is arranged on the sliding plate through a bracket and a servo motor is used to drive the rotating disk to rotate; the encoder is arranged on the servo motor drive shaft to detect the rotation position of the rotating disk; the vertical pole is arranged on the surface of the rotating disk through the center of the rotating disk; the slider is arranged on the vertical pole and slides along the vertical pole; the camera and light source are arranged on the slider; and the magnetic scale is arranged on the side of the vertical pole.

[0009] Furthermore, the light source is a high-intensity light source parallel to the CCD imaging system of the camera.

[0010] An offline detection method for the dynamic hole profile and roll gap of a sizing mill roll stand based on the above detection device comprises the following steps:

[0011] Step 1: Use a crane to lift the roller frame of the sizing mill to be inspected to the hoisting station, and use rolling bearings to support the roller frame of the sizing mill to be inspected in a plane;

[0012] Step 2: Start the translation mechanism to move the roller frame of the sizing machine to be inspected to the inspection station in the inspection frame through the conveyor chain;

[0013] Step 3: Start the three-roller driving mechanism to clamp the roller frame of the sizing mill to be tested, and drive the three rollers in the roller frame of the sizing mill to be tested to rotate synchronously at a set speed;

[0014] Step 4: According to the detection position, the camera is moved to the detection position through the linear and rotary motion mechanism, and the camera is driven to rotate circumferentially along the roller frame of the sizing mill to be detected. The camera performs circumferential scanning on the roller frame of the sizing mill to be detected to obtain the roller profile in the roller frame of the sizing mill to be detected, and the camera is rotated to the roller profile position and locked through the linear and rotary motion mechanism;

[0015] Step 5: The magnetic scale in the linear and rotary motion mechanism records the current rotation radius of the camera, and uses this position as the initial position of the roll shape detection. The linear and rotary motion mechanism drives the camera to rotate with the center of the roller frame of the sizing machine to be inspected and takes a photo of the sizing machine roll shape profile under the illumination environment of the camera light source. During the photo shooting process, the encoder in the linear and rotary motion mechanism records the photo rotation angle;

[0016] Step 6. According to the profile photo of the sizing mill roll detected by the camera, calculate the variation along the radial direction of the roll, and the position and angle of the camera during the measurement process of the radial and circumferential directions of the sizing mill roll, and obtain the roll profile shape data. According to the roll profile shape data, obtain the dynamic hole shape and roll gap data of the sizing mill roll frame to be tested, and obtain the difference data of the sizing mill roll shape parameters required for production.

[0017] Since the present invention adopts the above-mentioned technical scheme, the device and method for off-line detection of dynamic hole type and roller gap of the sizing machine roll frame are provided with a hoisting station and a detection frame at both ends of the top surface of the base, the detection frame is provided with a detection station, the driving motor of the translation mechanism is provided on one side of the detection frame, the conveyor chain is laid on the top surface of the base and extends from the hoisting station to the detection station, the driving motor drives the conveyor chain to move, the three-roller driving mechanism is provided on the detection frame and arranged at an angle of 120 degrees, the light source and the linear and rotary motion mechanism are provided on one side of the detection frame, the camera is provided on the linear and rotary motion mechanism and driven by the linear and rotary motion mechanism to perform linear and rotary movement. The method moves the roller frame of the sizing machine to be inspected to the detection station through the hoisting station and the translation mechanism, the three-roller driving mechanism clamps and drives the three rollers in the roller frame to rotate synchronously at a set speed; the camera detection position is set and the roller profile is photographed, and the dynamic hole type and roller gap of the roller frame are obtained according to the radial variation of the roller profile and the camera position. The device and method realize the off-line detection of the dynamic hole profile and roll gap of the three-roll tension sizing machine roll frame, improve the accuracy and precision of the detection, ensure the reliability and traceability of the data, thereby determining the repair process of the roll profile, reducing the repair amount, reducing roll consumption, and avoiding the generation of defective products and defective products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 It is a structural schematic diagram of the dynamic hole profile and roll gap off-line detection device of the sizing machine roll stand of the present invention;

[0020] Figure 2 This is a plan view of the device;

[0021] Figure 3 It is a schematic diagram of the linear and rotary motion mechanism in this device. DETAILED DESCRIPTION

[0022] Implementation example Figure 1 and Figure 2 As shown, the dynamic hole profile and roller gap offline detection device of the sizing machine roller frame of the present invention includes a base 1, a hoisting station 2, a detection frame 3, a translation mechanism 4, a three-roller driving mechanism 5, a light source 6, a camera 7 and a linear and rotational motion mechanism 8, the hoisting station 2 and the detection frame 3 are respectively arranged at the two ends of the top surface of the base 1, the base 1 is provided with a detection station 31 in the detection frame 3, the translation mechanism 4 includes a driving motor 41 and a conveying chain 42, the driving motor 41 is arranged on the end surface of the base 1 on one side of the detection frame 3, the conveying chain 42 is laid on the top surface of the base 1 and extends from the hoisting station 2 to the detection station 31, the driving motor 41 drives the conveying chain 42 to move, the three-roller driving mechanism 5 is arranged on the detection frame 3 and is arranged at an angle of 120 degrees, the light source 6 and the linear and rotational motion mechanism 8 are arranged on one side of the detection frame 3, the camera 7 is arranged on the linear and rotational motion mechanism 8 and is driven by the linear and rotational motion mechanism 8 to perform linear and rotational movement.

[0023] Preferably, the three-roller driving mechanism 5 includes a cylinder 51, a servo motor 52, a reduction box 53 and an arc gear rod 54, the servo motor 52 is connected to the arc gear rod 54 via the reduction box 53, the cylinder 51 is arranged in the housing of the servo motor 52 and the driving rod is connected to the arc gear rod 54.

[0024] Preferably, the linear and rotational motion mechanism 8 includes a sliding plate 81, a vertical rod 82, a slider 83, a rotating disk 84, a magnetic scale 85 and an encoder 86. The sliding plate 81 is arranged on one side of the detection frame through a sliding groove and a lead screw 87 and a stepping motor 88 are used to drive the sliding plate 81 to move. The rotating disk 84 is arranged on the sliding plate 81 through a bracket 89 and a servo motor is used to drive the rotating disk 84 to rotate. The encoder 86 is arranged on the servo motor drive shaft to detect the rotation position of the rotating disk 84. The vertical rod 82 is arranged on the surface of the rotating disk 84 through the center of the rotating disk 84. The slider 83 is arranged on the vertical rod 82 and slides along the vertical rod 82. The camera 7 and the light source 6 are arranged on the slider 83. The magnetic scale 85 is arranged on the side of the vertical rod 82.

[0025] Preferably, the light source 6 is a high-intensity light source parallel to the CCD imaging system of the camera 7 .

[0026] An offline detection method for the dynamic hole profile and roll gap of a sizing mill roll stand based on the above detection device comprises the following steps:

[0027] Step 1: Use a crane to lift the roller frame of the sizing mill to be inspected to the hoisting station, and use rolling bearings to support the roller frame of the sizing mill to be inspected in a plane;

[0028] Step 2: Start the translation mechanism to move the roller frame of the sizing machine to be inspected to the inspection station in the inspection frame through the conveyor chain;

[0029] Step 3: Start the three-roller driving mechanism to clamp the roller frame of the sizing mill to be tested, and drive the three rollers in the roller frame of the sizing mill to be tested to rotate synchronously at a set speed;

[0030] Step 4: According to the detection position, the camera is moved to the detection position through the linear and rotary motion mechanism, and the camera is driven to rotate circumferentially along the roller frame of the sizing mill to be detected. The camera performs circumferential scanning on the roller frame of the sizing mill to be detected to obtain the roller profile in the roller frame of the sizing mill to be detected, and the camera is rotated to the roller profile position and locked through the linear and rotary motion mechanism;

[0031] Step 5: The magnetic scale in the linear and rotary motion mechanism records the current rotation radius of the camera, and uses this position as the initial position of the roll shape detection. The linear and rotary motion mechanism drives the camera to rotate with the center of the roller frame of the sizing machine to be inspected and takes a photo of the sizing machine roll shape profile under the illumination environment of the camera light source. During the photo shooting process, the encoder in the linear and rotary motion mechanism records the photo rotation angle;

[0032] Step 6. According to the profile photo of the sizing mill roll detected by the camera, calculate the variation along the radial direction of the roll, and the position and angle of the camera during the measurement process of the radial and circumferential directions of the sizing mill roll, and obtain the roll profile shape data. According to the roll profile shape data, obtain the dynamic hole shape and roll gap data of the sizing mill roll frame to be tested, and obtain the difference data of the sizing mill roll shape parameters required for production.

[0033] The base of the device is installed to the application site in the form of civil engineering embedded parts or expansion bolts to fix the feet. The roller frame of the sizing mill to be inspected and the lifting station are supported in plane by rolling bearings. The roller frame of the sizing mill to be inspected is dragged by the transmission chain on the roller frame translation mechanism to complete the plane linear motion. The three-roller drive mechanism is precisely fixed to the detection frame by bolts, wherein the oil cylinder pushes the arc gear rod to move forward to the corresponding slot of the roller frame of the sizing mill to be inspected to clamp the roller frame of the sizing mill to be inspected, and the driving of the rollers on the roller frame of the sizing mill to be inspected is realized by the servo motor and the reduction box; the linear and rotary motion mechanism is installed on one side of the detection frame, the linear motion of the camera is realized by the lifting and lowering of the slider along the vertical pole, and the rotary motion is realized by the servo motor driving the rotating disk to rotate; the forward and backward motion of the camera is realized by the sliding plate driven by the lead screw and the stepper motor, the movement distance is detected and positioned by the magnetic scale, and the rotation position is precisely positioned circumferentially by the encoder.

[0034] This method is a non-contact roller profile detection method. It adopts the principle of optical imaging, uses a high-intensity parallel light source placed vertically to the roller frame and the CCD imaging system of the camera, and detects the hole type and gap between the rollers of the sizing machine roller frame when the three rollers on the sizing machine roller frame rotate synchronously through the light source and the CCD imaging system rotating along the roller circumference. This makes it easier to determine the repair process and repair amount of the roller shape, reduce roller consumption, and reduce the production of defective products.

Claims

1. An off-line detection device for dynamic hole profile and roll gap of a sizing mill roll stand, characterized by: The device includes a base, a hoisting station, a detection frame, a translation mechanism, a three-roller driving mechanism, a light source, a camera and a linear and rotational motion mechanism. The hoisting station and the detection frame are respectively arranged at the two ends of the top surface of the base. The base is provided with a detection station in the detection frame. The translation mechanism includes a driving motor and a conveying chain. The driving motor is arranged on the end surface of the base on one side of the detection frame. The conveying chain is laid on the top surface of the base and extends from the hoisting station to the detection station. The driving motor drives the conveying chain to move. The three-roller driving mechanism is arranged on the detection frame and is arranged at an angle of 120 degrees. The light source and the linear and rotational motion mechanism are arranged on one side of the detection frame. The camera is arranged The linear and rotary motion mechanism is driven by the linear and rotary motion mechanism to perform linear and rotary movements. The linear and rotary motion mechanism includes a sliding plate, a vertical rod, a slider, a rotating disk, a magnetic scale and an encoder. The sliding plate is arranged on one side of the detection frame through a sliding groove and a lead screw and a stepping motor are used to drive the sliding plate to move. The rotating disk is arranged on the sliding plate through a bracket and a servo motor is used to drive the rotating disk to rotate. The encoder is arranged on the servo motor drive shaft to detect the rotation position of the rotating disk. The vertical rod is arranged on the surface of the rotating disk through the center of the rotating disk. The slider is arranged on the vertical rod and slides along the vertical rod. The camera and light source are arranged on the slider, and the magnetic scale is arranged on the side of the vertical rod. By setting the camera detection position and shooting the roller profile, the dynamic hole shape and roller gap of the roller frame are obtained according to the radial variation of the roller profile and the camera position.

2. The sizing mill roll stand dynamic hole profile and roll gap offline detection device according to claim 1 is characterized by: The three-roller driving mechanism comprises an oil cylinder, a servo motor, a reduction box and an arc gear rod. The servo motor is connected to the arc gear rod via the reduction box. The oil cylinder is arranged in the servo motor housing and a driving rod is connected to the arc gear rod.

3. The sizing mill roll stand dynamic hole profile and roll gap offline detection device according to claim 2, characterized in that: The light source is a high-intensity light source parallel to the CCD imaging system of the camera.

4. An off-line detection method for the dynamic hole profile and roll gap of a sizing mill roll stand based on the detection device according to any one of claims 1 to 3, characterized in that This method comprises the following steps: Step 1: Use a crane to lift the roller frame of the sizing mill to be inspected to the hoisting station, and use rolling bearings to support the roller frame of the sizing mill to be inspected in a plane; Step 2: Start the translation mechanism to move the roller frame of the sizing machine to be inspected to the inspection station in the inspection frame through the conveyor chain; Step 3: Start the three-roller driving mechanism to clamp the roller frame of the sizing mill to be tested, and drive the three rollers in the roller frame of the sizing mill to be tested to rotate synchronously at a set speed; Step 4: According to the detection position, the camera is moved to the detection position through the linear and rotary motion mechanism, and the camera is driven to rotate circumferentially along the roller frame of the sizing mill to be detected. The camera performs circumferential scanning on the roller frame of the sizing mill to be detected to obtain the roller profile in the roller frame of the sizing mill to be detected, and the camera is rotated to the roller profile position and locked through the linear and rotary motion mechanism; Step 5: The magnetic scale in the linear and rotary motion mechanism records the current rotation radius of the camera, and uses this position as the initial position of the roll shape detection. The linear and rotary motion mechanism drives the camera to rotate with the center of the roller frame of the sizing machine to be inspected and takes a photo of the sizing machine roll shape profile under the illumination environment of the camera light source. During the photo shooting process, the encoder in the linear and rotary motion mechanism records the photo rotation angle; Step 6. According to the profile photo of the sizing mill roll detected by the camera, calculate the variation along the radial direction of the roll, and the position and angle of the camera during the measurement process of the radial and circumferential directions of the sizing mill roll, and obtain the roll profile shape data. According to the roll profile shape data, obtain the dynamic hole shape and roll gap data of the sizing mill roll frame to be tested, and obtain the difference data of the sizing mill roll shape parameters required for production.

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