阅读说明：本技术 一种焊接面角度测量装置及油箱焊接生产线 (Welding surface angle measuring device and oil tank welding production line ) 是由 周旋 梁志强 王荣 于 2021-08-25 设计创作，主要内容包括：本发明公开了一种焊接面角度测量装置及油箱焊接生产线,其中装置利用立体几何的公理3：经过不在一条直线上的三点有且只有一个平面,以及固定探杆、第一位移传感器及第二位移传感器的位置排布确定标准面与被测面；而后利用固定探杆、第一位移传感器及第二位移传感器仅探测两个探测点即可获得被测面的数据,而标准面是预先设定好的,此后只要计算出标准面与被测面之间的夹角即可得知被测面的生产是否合格,简单方便；在检测到不符合要求的油箱本体后,将之剔除即可省去后续对残次品焊接所需的时间及被焊接件,节省了时间,进而提高了油箱成品的生产效率,节省了被焊接件,从而降低了成本,增加了焊接附件后油箱成品的成品率。(The invention discloses a welding surface angle measuring device and an oil tank welding production line, wherein the device utilizes the axiom 3 of solid geometry: the standard surface and the measured surface are determined by arranging three points which are not on a straight line and only have one plane and the positions of the fixed probe rod, the first displacement sensor and the second displacement sensor; then, the data of the measured surface can be obtained by only detecting two detection points by using the fixed probe rod, the first displacement sensor and the second displacement sensor, the standard surface is preset, and whether the production of the measured surface is qualified or not can be obtained by only calculating the included angle between the standard surface and the measured surface, so that the method is simple and convenient; after the unqualified oil tank body is detected, the unqualified oil tank body is removed, so that the time for welding defective products and welded parts can be saved, the time is saved, the production efficiency of finished oil tank products is improved, the welded parts are saved, the cost is reduced, and the finished oil tank product yield after welding accessories is increased.)

1. A weld face angle measurement device, comprising: a measurement assembly, the measurement assembly comprising: the device comprises a first driving source, a fixed feeler lever, a first displacement sensor, a second displacement sensor and a controller, wherein the fixed feeler lever, the first displacement sensor and the second displacement sensor are arranged in a triangular shape, the fixed feeler lever is connected to an output shaft of the first driving source, the first driving source is at least used for driving the fixed feeler lever to move up and down, the fixed feeler lever is used for being attached to a first origin of a welding surface of an oil tank under the driving of the first driving source, the first displacement sensor is used for detecting the distance between the second origin and a first detection point of the welding surface of the oil tank, the second displacement sensor is used for detecting the distance between a third origin and a second detection point of the welding surface of the oil tank, and the controller is used for calculating an included angle between a standard surface and a detected surface according to the coordinates of the first origin, the coordinates of the second origin, the coordinates of the first detection point, the coordinates of the third origin and the coordinates of the second detection point, the standard surface is determined by a first origin, a second origin and a third origin, and the measured surface is determined by the first origin, a first detection point and a second detection point.

2. The welding surface angle measuring device according to claim 1, wherein the included angle α between the standard surface and the measured surface is calculated by the formula:where a is the vertical distance between the first origin and the second origin, b is 1/2 which is the vertical distance between the second origin and the third origin, n is the distance between the second origin and the first detection point, and m is the distance between the third origin and the second detection point.

3. The apparatus of claim 2, wherein the first and second displacement sensors are identical in construction and each comprise: the movable probe, the MCU and a second driving source are used for driving the movable probe to move downwards until the movable probe is abutted to the welding surface of the oil tank, and the MCU is used for recording the moving distance of the movable probe.

4. The apparatus according to claim 3, wherein a spring is fitted around an outer periphery of the movable probe, one end of the movable probe is inserted into the output shaft of the second driving source, and one end of the spring abuts against an end surface of the output shaft.

5. The weld face angle measurement device of claim 1, wherein an engagement block is connected to the output shaft of the first drive source, and the stationary probe, the first displacement sensor, and the second displacement sensor are all connected to the engagement block.

6. The weld face angle measurement device of claim 1, further comprising: the welding surface detection station comprises a plurality of measuring assemblies, and the measuring assemblies are used for measuring the angles of different welding areas of the oil tank respectively.

7. The welding surface angle measuring device according to claim 6, further comprising a disqualified oil tank pushing manipulator, wherein the disqualified oil tank pushing manipulator is located on one side of the welding surface detection station and comprises a supporting frame, a pushing cylinder and a pushing plate, the pushing cylinder is fixed on the supporting frame, and the pushing plate is connected to a piston rod of the pushing cylinder.

8. The weld face angle measurement device of claim 7, further comprising: an oil tank carriage, the oil tank carriage includes: two oil tank conveyer belts arranged in parallel; the welding surface angle measuring device further comprises an unqualified oil tank jacking assembly, wherein the unqualified oil tank jacking assembly is positioned between the two oil tank conveying belts and used for jacking the unqualified oil tank.

9. The weld face angle measurement device of claim 8, further comprising a rejected tank conveyor perpendicular to the tank carrier and facing away from the rejected tank ejection robot, the rejected tank conveyor having a width greater than a width of a tank.

10. A tank welding line, characterized in that it comprises a weld face angle measuring device according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of welding surface angle measuring devices, in particular to a welding surface angle measuring device for a plastic oil tank of a household car and an oil tank welding production line.

Background

In the production and manufacture of the oil tank, a plurality of parts need to be welded on the surface, wherein the influence of the angle of a welding surface on the welding quality is particularly important, and if the angle deviation is overlarge, poor welding or the deviation of the top end of a welding part is easy to be enlarged; when the problems occur, the oil tank leaks oil or the subsequent assembly is difficult; because welded parts are difficult to disassemble and are easy to damage a welded part, if the welding surface quality of the oil tank is unqualified, the welding wastes time and resources.

The invention patent with the publication number CN210615655U discloses a rotary welding device for a fuel tank cover, as shown in fig. 1, comprising: the welding machine comprises a machine body 1, a welding mechanism and a control panel 2, wherein a driving motor 3 is transversely and fixedly arranged at the bottom end of the front side surface of the machine body 1 through a C-shaped cavity, a C-shaped welding chamber 4 is vertically arranged at one end of the front side surface of the machine body 1 above the driving motor 3, the welding mechanism comprises a rotary table 5, a limiting frame 6 and a welding mechanical arm 7, the rotary table 5 is transversely and movably arranged at the bottom end of the inner wall of the welding chamber 4 through a circular transmission seat arranged in the middle of the bottom surface of the welding chamber 4, a plurality of telescopic supporting rods 8 are vertically and fixedly arranged on the top surface of the rotary table 5 through a mounting plate, the limiting frame 6 is transversely and movably arranged on the surface of one end, far away from the rotary table 5, of the telescopic supporting rods 8 through a fixing seat, an I-shaped guide rail 9 is transversely and fixedly arranged at the upper end of the inner wall of the welding chamber 4 through a connecting piece, a power slide block 10 is movably arranged in a chute at the outer side of the guide rail 9 through a roller, the welding mechanical arm 7 is movably arranged in the middle of the bottom surface of the power slide block 10 below the guide rail 9 through an electric rotary table, the control panel 2 is vertically and fixedly arranged at the upper end of the front side surface of the machine body 1 on one side of the welding chamber 4, and the control end of the control panel 2 is electrically connected with the driving motor 3, the telescopic supporting rod 8, the power sliding block 10 and the welding mechanical arm 7 respectively through an internal programmable controller.

The claimed technical effect of the invention patent is as follows: the vertical telescopic support rod that is equipped with between indoor wall bottom carousel of welding chamber and spacing, and the carousel is rotatory by driving motor control, can accomplish the regulation of angle about the difference of realization rotation according to the welding position demand through carousel and telescopic support rod, improves welding position's automatic adjustment efficiency when guaranteeing the welding quality. Obviously, although the invention patent can ensure the welding quality, the invention patent can not solve the problems of the oil tank quality.

That is, the prior art can only improve the welding quality by triggering the welding process, but cannot increase the production efficiency of the finished oil tank product or reduce the rejection rate of the finished oil tank product.

It can be seen that the prior art is still in need of improvement and development.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a welding surface angle measuring device and an oil tank welding production line, and aims to solve the problems that the prior art can only improve the welding quality by triggering a welding process, but cannot increase the production efficiency of finished oil tank products and cannot reduce the rejection rate of the finished oil tank products.

The technical scheme of the invention is as follows:

a weld face angle measurement device, comprising: a measurement assembly, the measurement assembly comprising: the device comprises a first driving source, a fixed feeler lever, a first displacement sensor, a second displacement sensor and a controller, wherein the fixed feeler lever, the first displacement sensor and the second displacement sensor are arranged in a triangular shape, the fixed feeler lever is connected to an output shaft of the first driving source, the first driving source is at least used for driving the fixed feeler lever to move up and down, the fixed feeler lever is used for being attached to a first origin of a welding surface of an oil tank under the driving of the first driving source, the first displacement sensor is used for detecting the distance between the second origin and a first detection point of the welding surface of the oil tank, the second displacement sensor is used for detecting the distance between a third origin and a second detection point of the welding surface of the oil tank, and the controller is used for calculating an included angle between a standard surface and a detected surface according to the coordinates of the first origin, the coordinates of the second origin, the coordinates of the first detection point, the coordinates of the third origin and the coordinates of the second detection point, the standard surface is determined by a first origin, a second origin and a third origin, and the measured surface is determined by the first origin, a first detection point and a second detection point.

The effect of above-mentioned scheme lies in: the invention utilizes axiom 3 of solid geometry: the standard surface and the measured surface are determined by arranging three points which are not on a straight line and only have one plane and the positions of the fixed probe rod, the first displacement sensor and the second displacement sensor; then, the data of the measured surface can be obtained by only detecting two detection points by using the fixed probe rod, the first displacement sensor and the second displacement sensor, the standard surface is preset, and whether the production of the measured surface is qualified or not can be obtained by only calculating the included angle between the standard surface and the measured surface, so that the method is simple and convenient; after the unqualified oil tank body is detected, the unqualified oil tank body is removed, so that the time required for welding defective products and welded parts can be saved, the time is saved, the production efficiency of finished oil tank products is improved, the welded parts are saved, the cost is reduced, the finished oil tank product yield after welding accessories is increased, the rejection rate of the finished oil tank products is reduced, and the problems that the welding quality can be improved only by triggering a welding process in the prior art, but the production efficiency of the finished oil tank products cannot be increased, and the rejection rate of the finished oil tank products cannot be reduced are solved.

In a further preferred embodiment, the calculation formula of the included angle α between the standard surface and the measured surface is:where a is the vertical distance between the first origin and the second origin, b is 1/2 which is the vertical distance between the second origin and the third origin, n is the distance between the second origin and the first detection point, and m is the distance between the third origin and the second detection point.

The effect of above-mentioned scheme lies in: the first origin, the second origin and the third origin are preset data, and an included angle alpha between the standard surface and the measured surface can be obtained by detecting a distance a between the second origin and the first detection point and a distance b between the third origin and the second detection point; that is, the invention can calculate the result according to the formula only by detecting the moving distance of the displacement sensor; the whole process is very quick and the efficiency is very high.

In a further preferred embodiment, the first displacement sensor and the second displacement sensor have the same structure, and both include: the movable probe, the MCU and a second driving source are used for driving the movable probe to move downwards until the movable probe is abutted to the welding surface of the oil tank, and the MCU is used for recording the moving distance of the movable probe.

The effect of above-mentioned scheme lies in: the first displacement sensor and the second displacement sensor are arranged to be of the same structure, so that the maintenance, the repair and the replacement are easy; according to the invention, the first detection point coordinate and the second detection point coordinate are calculated by recording the moving distance of the moving probe, so that the calculation accuracy is improved.

In a further preferred embodiment, a spring is sleeved on an outer edge of the movable probe, one end of the movable probe is inserted into the output shaft of the second driving source, and one end of the spring abuts against an end face of the output shaft.

The effect of above-mentioned scheme lies in: the movable probe has certain elasticity through the arrangement of the spring, when the movable probe is abutted to the welding surface of the oil tank, the movable probe can rebound due to the reaction force of the welding surface of the oil tank and can not move downwards continuously, the maximum downwards moving value of the movable probe can be taken as the distance a between the second origin and the first detection point by the MCU, or the distance b between the third origin and the second detection point by the MCU, other auxiliary devices are not required to be added, and the structure of the displacement sensor is simplified; and secondly, the oil tank made of plastic can be protected, and the displacement sensor is prevented from damaging the wall of the oil tank due to an unprotected structure.

In a further preferred aspect, an engagement block is connected to an output shaft of the first driving source, and the fixed probe, the first displacement sensor, and the second displacement sensor are all connected to the engagement block.

The effect of above-mentioned scheme lies in: the fixed probe, the first displacement sensor and the second displacement sensor are all connected to the connecting block, so that the moving distance of the first displacement sensor and the second displacement sensor can be reduced, and the volumes of the first displacement sensor and the second displacement sensor can be reduced; secondly, the reference consistency of the first origin, the second origin and the third origin can be ensured, and the accuracy of numerical measurement is further ensured; and thirdly, other fixed structures are not needed for the first displacement sensor and the second displacement sensor, so that the structure of the welding surface angle measuring device is simplified.

In a further preferred aspect, the welding surface angle measuring device further includes: the welding surface detection station comprises a plurality of measuring assemblies, and the measuring assemblies are used for measuring the angles of different welding areas of the oil tank respectively.

The effect of above-mentioned scheme lies in: according to the invention, the welding surface angle measuring device can rapidly complete the angle measurement of the welding surface of the oil tank by arranging the plurality of measuring assemblies respectively used for measuring the angles of different welding areas of the oil tank, even measure the angles of the welding surfaces of the oil tank at the same time, and the measuring efficiency of the oil tank is improved.

In a further preferred scheme, the welding surface angle measuring device further comprises an unqualified oil tank pushing manipulator, the unqualified oil tank pushing manipulator is located on one side of the welding surface detection station and comprises a supporting frame, a pushing cylinder and a pushing plate, the pushing cylinder is fixed on the supporting frame, and the pushing plate is connected to a piston rod of the pushing cylinder.

The effect of above-mentioned scheme lies in: by arranging the unqualified oil tank pushing-out manipulator, after the unqualified oil tank is detected, the unqualified oil tank can be quickly pushed out through the unqualified oil tank pushing-out manipulator, so that the next oil tank to be detected is conveyed to the welding surface detection station as soon as possible, and the oil tank detection efficiency is improved.

In a further preferred aspect, the welding surface angle measuring device further includes: an oil tank carriage, the oil tank carriage includes: two oil tank conveyer belts arranged in parallel; the welding surface angle measuring device further comprises an unqualified oil tank jacking assembly, wherein the unqualified oil tank jacking assembly is positioned between the two oil tank conveying belts and used for jacking the unqualified oil tank.

The effect of above-mentioned scheme lies in: the irregular structure that the oil tank adopted, reserve gapped between two parallel arrangement's the oil tank conveyer belt, the stability of oil tank in this clearance can improve the testing process guarantees the monitoring accuracy of oil tank when simplifying the welding face angle measuring device structure.

In a further preferred scheme, the welding surface angle measuring device further comprises an unqualified oil tank conveying belt, the unqualified oil tank conveying belt is perpendicular to the oil tank conveying frame and deviates from the unqualified oil tank pushing manipulator, and the width of the unqualified oil tank conveying belt is larger than that of the oil tank.

The effect of above-mentioned scheme lies in: different with the oil tank that waits to detect and the oil tank that is detecting, unqualified oil tank need not fix in transportation process, and unqualified oil tank is promoted to unqualified oil tank conveyer belt from the oil tank carriage, and the usable area body that has certain flexibility cushions unqualified oil tank, prevents that unqualified oil tank from falling the damage to retrieve.

The utility model provides an oil tank welding production line, oil tank welding production line includes above-mentioned welding face angle measuring device. Because the oil tank welding production line includes above-mentioned welding face angle measuring device, consequently contains the whole technical characterstic of above-mentioned welding face angle measuring device, has the whole technological effect of above-mentioned welding face angle measuring device, no longer gives unnecessary details.

Compared with the prior art, the welding surface angle measuring device provided by the invention utilizes axiom 3 of solid geometry: the standard surface and the measured surface are determined by arranging three points which are not on a straight line and only have one plane and the positions of the fixed probe rod, the first displacement sensor and the second displacement sensor; then, the data of the measured surface can be obtained by only detecting two detection points by using the fixed probe rod, the first displacement sensor and the second displacement sensor, the standard surface is preset, and whether the production of the measured surface is qualified or not can be obtained by only calculating the included angle between the standard surface and the measured surface, so that the method is simple and convenient; after the unqualified oil tank body is detected, the unqualified oil tank body is removed, so that the time required for welding defective products and welded parts can be saved, the time is saved, the production efficiency of finished oil tank products is improved, the welded parts are saved, the cost is reduced, the finished oil tank product yield after welding accessories is increased, the rejection rate of the finished oil tank products is reduced, and the problems that the welding quality can be improved only by triggering a welding process in the prior art, but the production efficiency of the finished oil tank products cannot be increased, and the rejection rate of the finished oil tank products cannot be reduced are solved.

Drawings

Fig. 1 is a schematic structural diagram of a tank cover rotary welding device disclosed in CN 210615655U.

FIG. 2 is a schematic view of a measuring assembly for a device for measuring the angle of a bonding surface according to a preferred embodiment of the present invention.

FIG. 3 is a schematic diagram of a first displacement sensor for use in the apparatus for measuring the angle of a bonding surface according to the preferred embodiment of the present invention.

FIG. 4 is a standard surface model established based on a first origin, a first origin and a second origin according to the present invention.

FIG. 5 is a model of the measured surface based on the first origin, the first probe point and the second probe point.

FIG. 6 shows a straight line B when m.noteq.n in the present invention₀C₀The intersection position with BC is shown schematically.

FIG. 7 shows a plane ABC and a plane AB of the present invention₀C₀Schematic representation of the dihedral angle α.

FIG. 8 shows a plane ABC and a plane AB when m is equal to n in the present invention₀C₀Schematic representation of the dihedral angle α.

FIG. 9 is a schematic view of a device for measuring the angle of a bonding surface according to a preferred embodiment of the present invention.

FIG. 10 is a schematic view of a reject fuel tank ejecting robot used in the apparatus for measuring the angle of a welding surface according to the preferred embodiment of the present invention.

Detailed Description

The present invention provides a weld face angle measurement apparatus and a tank welding line, the presently disclosed subject matter will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the presently disclosed subject matter are shown. Like numbers refer to like elements throughout. The presently disclosed subject matter may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Indeed, many modifications and other embodiments of the presently disclosed subject matter set forth herein will come to mind to one skilled in the art to which this invention pertains having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the presently disclosed subject matter is not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims.

The present invention provides a welding surface angle measuring device, as shown in fig. 2, the welding surface angle measuring device includes: a measurement assembly, the measurement assembly comprising: the device comprises a first driving source 110, a fixed probe 130, a first displacement sensor 140, a second displacement sensor 150 and a controller (not shown), wherein the fixed probe 130, the first displacement sensor 140 and the second displacement sensor 150 are arranged in a triangular shape, the fixed probe 130 is connected to an output shaft of the first driving source 110, the first driving source 110 is at least used for driving the fixed probe 130 to move up and down, the fixed probe 130 is used for being attached to a first origin of a welding surface of an oil tank under the driving of the first driving source 110, the first displacement sensor 140 is used for detecting the distance between a second origin and a first detection point of the welding surface of the oil tank, the second displacement sensor 150 is used for detecting the distance between a third origin and a second detection point of the welding surface of the oil tank, and the controller is used for calculating an included angle between a standard surface and a detected surface according to coordinates of the first origin, coordinates of the second origin, coordinates of the first detection point, coordinates of the third origin and coordinates of the second detection point, the standard surface is determined by a first origin, a second origin and a third origin, and the measured surface is determined by the first origin, a first detection point and a second detection point.

In a further preferred embodiment of the present invention, the welding surface angle measuring device further includes: a joint block 120, as shown in fig. 2, the joint block 120 is connected to an output shaft of the first driving source 110, and preferably, the stationary probe, the first displacement sensor 140 and the second displacement sensor 150 are all connected to the joint block 120. Specifically, the first driving source 110 is a double-rod cylinder or a three-rod cylinder, and the joint block 120 is connected to the tail end of a piston rod of the double-rod cylinder or the three-rod cylinder. The fixed probe, the first displacement sensor 140 and the second displacement sensor 150 are all connected to the connecting block 120, so that the moving distance of the first displacement sensor 140 and the second displacement sensor 150 can be reduced, and the volumes of the two can be reduced; secondly, the reference consistency of the first origin, the second origin and the third origin can be ensured, and the accuracy of numerical measurement is further ensured; third, the first displacement sensor 140 and the second displacement sensor 150 do not need other fixed structures, thereby simplifying the structure of the device for measuring the angle of the welding surface.

Preferably, the first displacement sensor 140 and the second displacement sensor 150 are identical in structure, and both include (fig. 3 illustrates the first displacement sensor 140 as an example for structural representation): the welding device comprises a mobile probe 142, an MCU (not shown) and a second driving source 141, wherein the second driving source 141 is used for driving the mobile probe 142 to move downwards until the mobile probe 142 abuts against a welding surface of the oil tank, and the MCU is used for recording the moving distance of the mobile probe 142. The first displacement sensor 140 and the second displacement sensor 150 are configured to have the same structure, so that the maintenance, repair and replacement are easy; according to the invention, the first detection point coordinate and the second detection point coordinate are calculated by recording the moving distance of the movable probe 142, so that the calculation accuracy is improved. Preferably, the first displacement sensor 140 and the second displacement sensor 150 are connected to the controller via a signal transmission cable 144, which is not described and limited in detail.

Further, a spring 143 is sleeved on an outer edge of the moving probe 142, as shown in fig. 3, one end of the moving probe 142 is inserted into the output shaft of the second driving source 141, and one end of the spring 143 abuts against an end surface of the output shaft. Through the arrangement of the spring 143, the mobile probe 142 has certain elasticity, when the mobile probe 142 abuts against the welding surface of the oil tank, the mobile probe will bounce due to the reaction force of the welding surface of the oil tank and will not move downwards continuously, and the MCU can use the maximum downward movement value of the mobile probe 142 as the distance a between the second origin and the first detection point, or the distance b between the third origin and the second detection point, and no other auxiliary device is needed, so that the structure of the displacement sensor is simplified; and secondly, the oil tank made of plastic can be protected, and the displacement sensor is prevented from damaging the wall of the oil tank due to an unprotected structure.

In a further preferred embodiment of the present invention, the calculation formula of the included angle α between the standard surface and the measured surface is:wherein a is a first origin and a second originB is 1/2 of the vertical distance between the second origin and the third origin, n is the distance between the second origin and the first probe point, and m is the distance between the third origin and the second probe point.

A model of the standard plane is established based on a first origin, a second origin and a third origin as references, as shown in fig. 4, where a is the first origin, B is the second origin, C is the third origin, X, Y and Z respectively denote an X axis, a Y axis and a Z axis, coordinates of the first origin are (a, 0, 0), coordinates of the second origin are (0, B, 0), and coordinates of the third origin are (0, -B, 0).

The model of the measured surface is built by using the first origin, the first detection point and the second detection point as the reference, as shown in FIG. 5, where A is the first origin and B is the first origin₀Is a first probe point, C₀The X, Y and Z axes are labeled X, Y and Z for the second probe point, respectively, with the first origin point having coordinates (a, 0, 0), the first probe point having coordinates (0, b, m), and the second probe point having coordinates (0, -b, n).

In the plane coordinate system OYZ, passing through the point B₀、C₀The equation of the straight line of (1) is:the equation for the straight line through B, C is: and z is 0.

If m is not equal to n, the straight line B₀C₀An intersection point with BC is determined, and the intersection point is set as D, as shown in FIG. 6, the straight line BC and the straight line B₀C₀The equation of (c) can be found in the coordinates of point D:in the plane coordinate system OXY, the equation of the straight line AD passing through the point a (a, 0) and the point D (0, 0) is:the straight line AD is the plane ABC and the plane AB₀C₀As shown in fig. 7 (line OB is hidden in the present invention to more clearly illustrate dihedral angle α)₀And line AB₀) In a plane coordinate system OXY, a perpendicular line of a straight line AD is drawn through an origin O, a foot is set as E, and a straight line is setB₀C₀The intersection point of the Z axis and the Z axis is F, then ^ OEF is the plane ABC and the plane AB₀C₀The dihedral angle α.

Since the line OE is perpendicular to the line AD and the line OE crosses the origin O (0, 0, 0), the equation of the line AD is determinedThe equation for the available line OE is:

the coordinates of point E can be calculated from the equation of line AD and the equation of line OE as:due to OB₀＝OC₀B, so

In the right-angled triangle OEF, the,simplifying to obtain the formula:

in order to calculate the numerical value conveniently, in the design of the invention, if a is equal to b, the formula can be further simplified as follows:

if n is m, the invention constructs a coordinate system as shown in fig. 8, and then the OAF is the plane ABC and the plane AB₀C₀The dihedral angle α ofIn the case of a ═ b, the formulae obtained in the preceding paragraph are simplifiedThe same applies.

In summary, when a is set as b, the calculation formula of α is as follows

In the past oil tank production process, no economic and effective method can synchronously detect the angle of the welding surface in the production process. The main method is to carry out spot check through a fixed time period, and a 3D professional measuring instrument is needed, so that the requirement on the skill and literacy of personnel is higher, and the occurrence of batch poor products cannot be completely avoided. Although a gauge and welding quality inspection are also performed in the post-stage machining, when defective products occur in the process, waste of manpower and material resources is already caused. In addition, a mode of shooting a welding surface by using a 3D camera can be used for detection, but the 3D camera is very expensive, and when one oil tank has a plurality of welding points to be detected, the accuracy is difficult to guarantee.

The invention utilizes axiom 3 of solid geometry: the standard surface and the measured surface are determined by the position arrangement of three points which are not on a straight line and only have one plane, the fixed probe 130, the first displacement sensor 140 and the second displacement sensor 150; then, the data of the measured surface can be obtained by only detecting two detection points by using the fixed probe 130, the first displacement sensor 140 and the second displacement sensor 150, the standard surface is preset, and whether the production of the measured surface is qualified or not can be obtained by only calculating the included angle between the standard surface and the measured surface, so that the method is simple and convenient; after the unqualified oil tank body is detected, the unqualified oil tank body is removed, so that the time required for welding defective products and welded parts can be saved, the time is saved, the production efficiency of finished oil tank products is improved, the welded parts are saved, the cost is reduced, the finished oil tank product yield after welding accessories is increased, the rejection rate of the finished oil tank products is reduced, and the problems that the welding quality can be improved only by triggering a welding process in the prior art, but the production efficiency of the finished oil tank products cannot be increased, and the rejection rate of the finished oil tank products cannot be reduced are solved.

According to another aspect of the present invention, the welding surface angle measuring device further includes: a welding surface detection station (not shown, and the welding surface detection station is located below the measurement component shown in fig. 9), where the welding surface detection station includes a plurality of measurement components, and as shown in fig. 9, the plurality of measurement components are respectively used to measure angles of different welding areas of the oil tank. According to the invention, the welding surface angle measuring device can rapidly complete the angle measurement of the welding surface of the oil tank by arranging the plurality of measuring assemblies respectively used for measuring the angles of different welding areas of the oil tank, even measure the angles of the welding surfaces of the oil tank at the same time, and the measuring efficiency of the oil tank is improved.

Further, the welding surface angle measuring device further includes an unqualified oil tank push-out manipulator 200, as shown in fig. 9 and 10, the unqualified oil tank push-out manipulator 200 is located on one side of the welding surface detection station, and includes a supporting frame 210, a push cylinder 220 and a push plate 230, the push cylinder 220 is fixed on the supporting frame 210, and the push plate 230 is connected to a piston rod of the push cylinder 220. By arranging the unqualified oil tank pushing-out manipulator 200, after the unqualified oil tank is detected, the unqualified oil tank can be quickly pushed out by the unqualified oil tank pushing-out manipulator 200, so that the next oil tank to be detected is conveyed to the welding surface detection station as soon as possible, and the detection efficiency of the oil tank is improved.

Preferably, the welding surface angle measuring device further includes: a tank carrier, as shown in fig. 9, comprising: two parallel oil tank conveyor belts 410; the welding surface angle measuring device further comprises an unqualified oil tank jacking assembly 300, as shown in fig. 9, the unqualified oil tank jacking assembly 300 is positioned between two oil tank conveying belts 410 and used for jacking up unqualified oil tanks. The irregular structure that the oil tank adopted, it has the clearance to reserve between two parallel arrangement's oil tank conveyer belt 410, and this clearance can improve the stability of oil tank in the testing process, guarantees the monitoring accuracy of oil tank when simplifying the welding face angle measuring device structure.

Preferably, the welding surface angle measuring device further comprises an unqualified oil tank conveying belt 500, as shown in fig. 9, the unqualified oil tank conveying belt 500 is perpendicular to the oil tank conveying frame and deviates from the unqualified oil tank pushing-out mechanical arm 200, and the width of the unqualified oil tank conveying belt 500 is larger than that of the oil tank. Different with the oil tank that waits to detect and the oil tank that is detecting, unqualified oil tank need not fix in transportation process, and unqualified oil tank is promoted to unqualified oil tank conveyer belt 500 from the oil tank carriage, and the usable area body that has certain flexibility cushions unqualified oil tank, prevents that unqualified oil tank from falling the damage to retrieve.

The utility model provides an oil tank welding production line, oil tank welding production line includes above-mentioned welding face angle measuring device. Because the oil tank welding production line includes above-mentioned welding face angle measuring device, consequently contains the whole technical characterstic of above-mentioned welding face angle measuring device, has the whole technological effect of above-mentioned welding face angle measuring device, no longer gives unnecessary details.

Throughout the specification, the terms "top", "bottom", "above", "below" and "on" are used with reference to the relative positions of components of the device, such as the relative positions of top and bottom substrates within the device. It should be understood that the device is usable regardless of the spatial orientation of the device.

The terms "a" and "an" and "the" are used herein, including the claims, to mean "one or more" in accordance with established patent statutory convention. Thus, for example, reference to "a subject" includes a plurality of subjects unless the context clearly dictates otherwise (e.g., a plurality of subjects), and so forth. Throughout the specification and claims, the term "comprising" is used in a non-exclusive sense, unless the context requires otherwise. Likewise, the terms "include" and its grammatical variants are intended to be non-limiting, such that recitation of items in a list is not to the exclusion of other like items that can be substituted or added to the listed items.

For the purposes of this specification and the appended claims, unless otherwise indicated, all numbers expressing quantities, dimensions, sizes, proportions, shapes, formulations, parameters, percentages, parameters, amounts, characteristics, and other numerical values used in the specification and claims are to be understood as being modified in all instances by the term "about", even though the term "about" may not expressly appear to be at value, amount, or range. Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are not, and need not, be exact, but may be approximate and/or larger or smaller, as desired, reflecting tolerances, conversion factors, rounding off, measurement error and the like, as well as other factors known to those of skill in the art, depending on the desired properties sought to be obtained by the presently disclosed subject matter. For example, the term "about," when referring to a value, can be meant to encompass, as compared to the specified value, a variation of 100% in some embodiments, a variation of 50% in some embodiments, a variation of 20% in some embodiments, a variation of 10% in some embodiments, a variation of 5% in some embodiments, a variation of 1% in some embodiments, a variation of 0.5% in some embodiments, and a variation of 0.1% in some embodiments, as such variations are suitable for practicing the disclosed method or using the disclosed composition.

Further, the term "about" when used in conjunction with one or more numbers or ranges of values should be understood to refer to all such numbers, including all numbers in the range and modifying the range by extending the boundaries above and below the values. The recitation of numerical ranges by endpoints includes all numbers such as integers subsumed within that range, including fractions thereof (e.g. the recitation of 1 to 5 includes 1, 2, 3, 4, and 5, and fractions thereof, such as 1.5, 2.25, 3.75, 4.1, etc.), and any range within that range. All publications, patent applications, patents, and other references mentioned in this specification are indicative of the level of skill of those skilled in the art to which the presently disclosed subject matter pertains. All publications, patent applications, patents, and other references are herein incorporated by reference to the same extent as if each individual publication, patent application, patent, and other reference was specifically and individually indicated to be incorporated by reference. It will be understood that, although a number of patent applications, patents and other references are referred to herein, these references do not constitute an admission that any of these documents forms part of the common general knowledge in the art.

Although the foregoing subject matter has been described in some detail by way of illustration and example for purposes of clarity of understanding, it will be apparent to those of ordinary skill in the art that certain changes and modifications may be practiced within the scope of the appended claims.