阅读说明：本技术 一种用于两薄板电子束焊板间高低差测量的系统和方法 (System and method for measuring height difference between two thin plate electron beam welding plates ) 是由 李毅 杨磊 张迎松 李怡豪 于 2021-09-18 设计创作，主要内容包括：本发明公开了一种用于两薄板电子束焊板间高低差测量的系统和方法。该系统所包括的装置有线激光距离传感器、速度传感器、控制器、传感器保护装置、线激光距离传感器固定装置、速度传感器固定装置、圆盘支架、半圆盒转动装置、驱动转轴、驱动器,其中焊枪垂直于薄板平面且焊枪中心在两薄板间隙的中心线上,线激光距离传感器通过传感器固定装置与半圆盒转动装置连接,焊枪沿着两板间隙做一遍往复运动,当焊枪完成单程路线时,此时线激光距离传感器记录下板A的各点高度。在驱动器的控制下,驱动转轴发生旋转并带动半圆盒装置一起运动,当线激光距离传感器转动180°时停止。之后线激光距离传感器随着焊枪的移动记录板B的各点高度。焊接完成后,重复上述动作,线激光距离传感器再次分别记录板A、B的焊缝焊后高度。本发明系统简单,可实现两薄板焊前的高低差测量以及薄板焊后纵向高度变形的测量。(The invention discloses a system and a method for measuring the height difference between two thin plate electron beam welding plates. The system comprises a linear laser distance sensor, a speed sensor, a controller, a sensor protection device, a linear laser distance sensor fixing device, a speed sensor fixing device, a disc support, a semicircular box rotating device, a driving rotating shaft and a driver, wherein a welding gun is perpendicular to a sheet plane, the center of the welding gun is located on the central line of a gap between two sheets, the linear laser distance sensor is connected with the semicircular box rotating device through the sensor fixing device, the welding gun does reciprocating motion once along the gap between the two sheets, and when the welding gun completes a one-way route, the linear laser distance sensor records the height of each point of a lower plate A. Under the control of the driver, the driving rotating shaft rotates and drives the semicircular box device to move together, and the linear laser distance sensor stops when rotating 180 degrees. The line laser distance sensor then records the height of each point of the board B as the welding gun moves. After the weld is complete, the above actions are repeated and the line laser distance sensors again record the post weld height of the welds of the panel A, B, respectively. The system is simple, and can realize the height difference measurement before welding the two sheets and the measurement of the longitudinal height deformation of the sheets after welding.)

1. A system and a method for measuring the height difference between two thin plate electron beam welding plates mainly solve the problems that the positions measured by laser before and after changing the posture of a welding gun are inconsistent when the height of the plate is measured. The method is characterized in that: the system comprises a line laser distance sensor, a speed sensor, a controller, a sensor protection device, a line laser distance sensor fixing device, a speed sensor fixing device, a disc support, a semicircular box rotating device, a driving rotating shaft and a driver, wherein a welding gun is perpendicular to the plane of a thin plate, the center of the welding gun is located on the central line of the gap between the two thin plates, the line laser distance sensor is connected with the semicircular box rotating device through the sensor fixing device, the welding gun does reciprocating motion along the gap between the two thin plates once, when the welding gun completes a single-pass route, the line laser distance sensor records the height of each point of a lower plate A, under the control of the driver, the driving rotating shaft rotates and drives the semicircular box device to move together, when the line laser distance sensor rotates 180 degrees, the line laser distance sensor stops, and then the line laser distance sensor records the height of each point of a plate B along with the movement of the welding gun. After the weld is complete, the above actions are repeated and the line laser distance sensors again record the post weld height of the welds of the panel A, B, respectively. The system is simple, and can realize the height difference measurement before welding the two sheets and the measurement of the longitudinal height deformation of the sheets after welding.

2. The speed sensor of claim 1 being a non-contact sensor, wherein: the speed sensor fixing device is connected with the welding gun, the linear speed of the welding gun is collected when the welding gun starts to move to the process of finishing the unilateral path stop motion at a fixed speed v, and when the linear speed of the welding gun is changed from v to 0, the speed sensor outputs a signal to the controller.

3. The controller and driver as claimed in claim 1, wherein the controller outputs the signal to the driver after receiving the signal from the speed sensor, and the driver drives the shaft to rotate. When the speed of the welding gun is v, no signal is input and output.

4. The apparatus for driving a rotation shaft and a semicircular box as claimed in claim 1, wherein: the driving rotating shaft is connected with the disc support, a flat cylinder is arranged at the top of the driving rotating shaft and used for supporting and connecting the semicircular box rotating device, the flat cylinder is matched with a groove at the bottom of the semicircular box rotating device, and the flat cylinder and the semicircular box rotating device have the same angular speed. The semicircular box rotating device is connected with the welding gun and the disc support, and can rotate relative to the welding gun and the disc support. When the speed of the welding gun is changed from v to 0, the speed sensor transmits a signal to the controller, the controller outputs the signal to the driver, and under the control of the driver, the rotating shaft is driven to rotate and drives the semicircular box device and the line laser distance sensor to move together for 180 degrees and then stop. When the speed of the welding gun is v, no signal is input, and the rotating shaft is driven to be continuously static.

Technical Field

The invention relates to the technical field of welding, in particular to a system and a method for measuring height difference between two thin plate electron beam welding plates.

Background

The mechanization and automation of the welding process is an important development of the modern welding technology, which not only marks higher welding production efficiency and better welding quality, but also greatly improves the production labor conditions. The laser is widely applied in the detection field, the technical content is rich, the influence on social production and life is obvious, and the laser ranging is one of the earliest applications of the laser, because the laser has the advantages of strong directivity, high brightness, good monochromaticity and the like.

In the welding process, the asymmetry of the height of the plate caused by the manufacturing error of the part material or the error caused by manual placement has great influence on the welding seam quality; when the plate height is measured, the heights of the left plate and the right plate of the welding gun are measured by changing the posture of the welding gun, so that the positions measured by front laser and rear laser are inconsistent; after welding, the dimensions of the weld change and subsequent weld deformation needs to be calculated. In view of the foregoing, there is a need for a new apparatus or method for accurately measuring the pre-weld and post-weld position and dimensions of a weld.

Disclosure of Invention

The invention aims to meet the detection of height difference between two thin plates before welding and the deformation measurement of longitudinal height after welding, and simultaneously avoid measurement errors caused by changing the posture of a welding gun, so that a system and a method for measuring the height difference between two thin plate electron beam welding plates are provided.

The invention adopts the following devices to solve the problems: the device comprises a line laser distance sensor, a speed sensor, a controller, a sensor protection device, a line laser distance sensor fixing device, a speed sensor fixing device, a disc support, a semicircular box rotating device, a driving rotating shaft and a driver.

The welding gun is vertical to the plane of the thin plates, the center of the welding gun is positioned on the central line of the gap between the two thin plates, and the line laser distance sensor is connected with the semicircular box rotating device through the sensor fixing device. In order to prevent the sensor from being damaged by the electron beams and sparks, splashes and the like generated in the welding process, a sensor protection device is arranged on the sensor. The gun reciprocates one time along the gap between the two plates and the height of the two plates is recorded A, B respectively.

And collecting the linear velocity of the welding gun in the process that the welding gun starts to move to finish the stop motion of the unilateral path, and recording the heights of all points of the lower plate A by the linear laser distance sensor when the welding gun finishes the one-way path. When the linear velocity of the welding gun is changed from v to 0, the velocity sensor outputs a signal to the driver through the controller. Under the control of the driver, the rotating shaft is driven to rotate and drive the semicircular box device and the line laser distance sensor to move together for 180 degrees and then stop. The top of the driving rotating shaft is provided with a flat cylinder which is used for supporting and connecting the semicircular box rotating device, the flat cylinder is matched with a groove at the bottom of the semicircular box rotating device, the flat cylinder and the semicircular box rotating device have the same angular speed, and when the driving rotating shaft rotates, the top flat cylinder drives the semicircular box rotating device to rotate together. At the moment, the line laser distance sensor moves along with the welding gun to record the height of each point of the B plate. After the welding is completed, the above-described operation is repeated, and the line laser distance sensor again records the post-welding height of each point of the board A, B.

The invention has the advantages of simple system and principle, capability of realizing height difference detection before welding two sheets and measurement of longitudinal height deformation of the sheets after welding, and avoiding measurement errors caused by changing the posture of a welding gun.

Drawings

FIG. 1 is a schematic diagram of the present invention;

fig. 2 is a schematic diagram of the system operation of the present invention.

In the figure, (1) -welding gun, (2) -semicircular box rotating device, (3) -line laser distance sensor A, (4) -disc support, (5) -speed sensor and (6) -driving rotating shaft.

Detailed description of the preferred embodiments

In order to express the technical scheme and the achievement of the invention more concisely and clearly, the invention is further described with reference to the accompanying drawings and the implementation mode.

Line laser distance sensor range finding principle: when the laser sensor works, the laser diode is firstly aligned to a target to emit laser pulses. The laser light is scattered in all directions after being reflected by the target. Part of the scattered light returns to the sensor receiver, is received by the optical system and is imaged onto the avalanche photodiode. The avalanche photodiode is an optical sensor having an amplification function therein, and thus it can detect an extremely weak optical signal. The time from the emission of the light pulse to the return to be received is recorded and processed, i.e. the target distance can be determined.

In the method for measuring the height error between the two thin plate electron beam welding plates in the embodiment, the welding gun is perpendicular to the plane of the thin plates, the center of the welding gun is positioned on the central line of the gap between the two thin plates, and the line laser distance sensor is connected with the (2) semicircular box rotating device through the sensor fixing device, wherein the semicircular box rotating device is connected with the (1) welding gun and the (4) disc support. In order to prevent the sensor from being damaged by the electron beams and sparks, splashes and the like generated in the welding process, a sensor protection device is arranged on the sensor. The gun reciprocates one time along the gap between the two plates and the height of the two plates is recorded A, B respectively.

The working principle of this embodiment will now be described as follows:

a method for measuring the height error between two thin plate electron beam welding plates is mainly characterized in that: the device comprises a linear laser distance sensor, a speed sensor, a controller, a driver, a sensor protection device, a sensor fixing device and a semicircular box rotating device, wherein a welding gun is perpendicular to the plane of a thin plate, the center of the welding gun is arranged on the central line of the gap between the two thin plates, the linear laser distance sensor is connected with the semicircular box rotating device through the sensor fixing device, the welding gun does reciprocating motion once along the gap between the two plates, the linear speed of the welding gun is collected in the process that the welding gun starts to move to complete the stop motion of a unilateral path, when the welding gun completes a one-way path, the linear laser distance sensor records the height of each point of a lower plate A, and when the linear speed of the welding gun is changed from v to 0, the speed sensor outputs a signal to the driver through the controller. And (6) under the control of the driver, driving the rotating shaft to rotate and driving the semicircular box device and the line laser distance sensor to move together for 180 degrees and then stop. The top of the driving rotating shaft is provided with a flat cylinder which is used for supporting and connecting the semicircular box rotating device, the flat cylinder is matched with a groove at the bottom of the semicircular box rotating device, the flat cylinder and the semicircular box rotating device have the same angular speed, and when the driving rotating shaft rotates, the top flat cylinder drives the semicircular box rotating device to rotate together. When the speed of the welding gun is v, no signal is input, and the rotating shaft is driven to be continuously static. The line laser distance sensor records the height of each point of the board B along with the movement of the welding gun. After the welding is finished, the actions are repeated, and the line laser distance sensor records the height of each point of the board A, B after welding again, so that the height error detection before the welding of the two thin plates and the measurement of the longitudinal height deformation of the thin plates after welding are realized.

The above disclosure is only for the specific embodiments of the present invention, but the present invention is not limited thereto, and it will be apparent to those skilled in the art that modifications and variations can be made without departing from the principle of the present invention.