Irregular welding seam inspection ruler and measurement method thereof
By designing the irregular weld inspection ruler of the distributed scale needle and using the longitudinally movable ruler for contour profiling, the problem of the inability to measure irregular welds in the prior art is solved, and high-precision weld measurement and detection quality is improved.
Patent Information
- Application Number
- CN202510468098.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2025-05-30
AI Technical Summary
The existing welding inspection rulers cannot effectively measure the size of irregular welds such as arc welds, blunt corner welds and overlap welds, which limits the quality of weld inspection of welded structures.
An irregular weld inspection ruler is designed, using the principle of a distributed scale needle, and the contour is contoured through two rows of longitudinally movable ruler needles, combining the locking mechanism and limit bars to achieve accurate measurement of irregular welds.
It realizes accurate, convenient and rapid measurement of irregular welds, improves the quality of weld inspection of weld structures, and can measure conventional welds at the same time, broadening the scope of application.
Smart Images
Figure CN120063081A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the measurement of the external dimensions of welds in the field of welding, and specifically refers to an irregular weld inspection ruler and its measurement method. Background Art
[0002] Weld measurement plays an extremely important role in welding technology and quality control. By accurately measuring the dimensions, shape, and position of welds, it is possible to determine whether the welding process has met the expected standards and requirements, which helps to promptly detect and solve possible problems in the welding process, such as welding defects, dimensional deviations, etc., thereby ensuring the strength and stability of the welded joint.
[0003] Conventional weld inspection rulers (such as the M306041 type welding inspection ruler) include a height ruler, an undercut depth ruler provided on the front surface of the main ruler, and an angle multi-purpose ruler provided on the back surface of the main ruler, and can effectively measure dimensional data such as flat butt welds, 90° fillet welds, weld grooves, undercuts of flat butt welds, and gaps of butt welds. For example, when measuring the height of a flat weld, align the undercut ruler to zero and tighten the screw to prevent movement. Gently press the working surface of the weld inspection ruler (i.e., the surface in contact with the weld) against one side of the weld, slide the height ruler until it contacts the top of the weld (i.e., the weld point), and observe the indicated value on the height ruler as the weld height. However, the application range of conventional weld inspection rulers is limited, and they cannot effectively measure the dimensions of irregular welds such as curved surface welds, obtuse angle welds, and lap welds.
[0004] Therefore, it is necessary to develop an irregular weld inspection ruler and its measurement method to accurately, conveniently, and quickly measure the dimensions of irregular welds such as curved surface welds, obtuse angle welds, and lap welds, and improve the weld detection quality of various welded structures. Summary of the Invention
[0005] The purpose of the present invention is to solve the deficiencies of the above background art, and provide an irregular weld inspection ruler and its measurement method to accurately, conveniently, and quickly measure the dimensions of irregular welds such as curved surface welds, obtuse angle welds, and lap welds, and improve the weld detection quality of various welded structures. Moreover, it can also measure conventional welds at the same time, greatly expanding the application range compared with conventional weld inspection rulers and improving the measurement accuracy.
[0006] The technical solution of the present invention is: an irregular weld inspection ruler, including a long plate-shaped main ruler arranged horizontally and a scale needle passing through the main ruler and longitudinally movable.
[0007] A first scale line is provided horizontally along the upper edge of the front surface of the main ruler, and both upper side corners of the main ruler are 90 degrees, and both lower side corners are provided with auxiliary hypotenuses with a longitudinal included angle of 45 degrees.
[0008] The scale needle is arranged longitudinally and has pointed tips at both ends. The surface of the scale needle is provided with third scale lines longitudinally between the two pointed tips. Multiple scale needles are laid horizontally in rows for profile copying. Two rows of scale needles are arranged at intervals in the front-back direction along the thickness of the main scale. The main scale is provided with a locking mechanism for respectively locking each row of scale needles.
[0009] Preferably, the main scale includes a front bottom plate, a middle bottom plate, and a rear bottom plate arranged in sequence from front to back. The first scale line is arranged on the front bottom plate. Two rows of scale needles are respectively arranged between the front bottom plate and the middle bottom plate and between the middle bottom plate and the rear bottom plate.
[0010] Furthermore, the locking mechanism includes front row locking bolts passing through the front bottom plate and threadedly connected to the middle bottom plate. The front row locking bolts are arranged in pairs on both sides of the front bottom plate. The front row locking bolts are one pair or multiple pairs arranged at longitudinal intervals.
[0011] Even further, the locking mechanism further includes rear row locking bolts passing through the rear bottom plate and threadedly connected to the middle bottom plate. The rear row locking bolts are arranged in pairs on both sides of the rear bottom plate. The rear row locking bolts are one pair or multiple pairs arranged at longitudinal intervals.
[0012] Even further, the middle bottom plate is provided with threaded blind holes on its front and rear surfaces respectively corresponding to and connected to the front row locking bolts and the rear row locking bolts.
[0013] Preferably, limiting strips are arranged longitudinally on both the front and rear surfaces of the middle bottom plate. The limiting strips on each surface are attached to both sides of the corresponding row of scale needles. The limiting strips longitudinally extend to be flush with the upper and lower ends of the middle bottom plate. The thickness of the limiting strips is greater than the radius of the scale needle and does not exceed the diameter of the scale needle.
[0014] Furthermore, the front bottom plate and the rear bottom plate are respectively provided with front mating strips and rear mating strips longitudinally on the side adjacent to the middle bottom plate. The two front mating strips are respectively attached to and limited by the outer sides of the two limiting strips on the front surface of the middle bottom plate. The two rear mating strips are respectively attached to and limited by the outer sides of the two limiting strips on the rear surface of the middle bottom plate;
[0015] The front mating strips and the rear mating strips have the same thickness as the limiting strips.
[0016] Furthermore, both side edges of the main scale are arranged longitudinally, and at least one side of the front surface of the main scale is provided with second scale lines longitudinally.
[0017] The present invention also provides a method for using the irregular weld inspection ruler described above, including a fillet weld measurement method, a curved surface weld measurement method, and a lap weld measurement method;
[0018] The butt weld measurement method includes: the front row of scale needles are pressed against the surface of the weld to be measured and the two side areas and then locked, simulating the contour of the weld and the two side areas. The front row of scale needles is used to draw the contour map of the weld and the two side areas. On the contour map, the workpiece diagram without weld is obtained by the intersection of the extension lines of the two side areas. The rear row of scale needles is profiled according to the workpiece diagram without weld and the front and rear rows of scale needles are made to coincide in the two side areas of the weld. The weld thickness is obtained according to the maximum value of the front and rear scale differences of the two rows of scale needles, and the weld width is obtained according to the scale difference of the two scale needles corresponding to the weld edge on the first scale line of the front row of scale needles.
[0019] Further, the fillet weld measurement method includes: the front row of scale needles are pressed against the surface of the weld to be measured and the two side areas and then locked, simulating the contour of the weld and the two side areas; the inspection ruler is moved along the surface of the workpiece to the area without weld. At this time, the two side areas of the weld of the front row of scale needles coincide with the edge of the workpiece. The rear row of scale needles is pressed against the workpiece fully. The weld thickness is obtained according to the maximum value of the front and rear scale differences of the two rows of scale needles, and the weld width is obtained according to the scale difference of the two scale needles corresponding to the weld edge on the first scale line of the front row of scale needles.
[0020] Further, the lap weld measurement method includes: any row of scale needles is pressed against the surface of the weld to be measured and the two side areas in a direction perpendicular to the surface of the base material and then locked, simulating the contour of the weld and the two side areas. The weld width is obtained according to the scale difference of the two scale needles corresponding to the weld edge on the first scale line; the weld height is obtained according to the scale difference between the highest scale needle and the lowest scale needle corresponding to the measured weld area.
[0021] The beneficial effects of the present invention are as follows:
[0022] 1. An irregular weld inspection ruler is designed by using the principle of distributed scale needles. Both rows of scale needles can move longitudinally to profile the surface contour through the ends. The front row of scale needles is used to profile the weld area, and the rear row of scale needles is used to profile the corresponding non-weld area on the workpiece. By directly comparing or making a drawing comparison between the two, the size of the irregular weld can be obtained, realizing the measurement of the irregular weld accurately, conveniently and quickly.
[0023] 2. The irregular weld inspection ruler of the present invention can also use only a single row of scale needles to obtain various data of conventional welds. The weld reinforcement can be measured by the scale difference between the scale needle at the weld edge and the scale needle at the highest point in the center of the weld; the weld width can be measured by the scale difference between the scale needles corresponding to the two edges of the weld on the first scale line of the base plate; the undercut depth can be measured by the scale difference between the scale needle at the normal weld edge and the scale needle at the deepest part of the undercut; if there are defects such as weld tumors, incomplete fusion, and depressions, the defect size can also be measured by the scale difference of the scale needles.
[0024] 3. On both upper side corners of the main scale of the present invention, the angles are both 90 degrees, and on both lower side corners, auxiliary bevel edges with a longitudinal included angle of 45 degrees are provided. The auxiliary bevel edges are convenient for fitting with the areas on both sides of the weld when measuring conventional right-angle welds. Both ends of the scale needle are pointed, which is convenient for accurately measuring by inserting into small parts such as undercut and pit. A third scale line is set in the middle part, which is convenient for directly obtaining longitudinal dimension data during single-row measurement or obtaining longitudinal dimension data by comparing the front and rear scales during double-row measurement.
[0025] 4. The main scale includes a front bottom plate, a middle bottom plate, and a rear bottom plate arranged in sequence from front to back. The front row of scale needles is arranged between the front bottom plate and the middle bottom plate and is locked or loosened by the front row of locking bolts; the rear row of scale needles is arranged between the middle bottom plate and the rear bottom plate and is locked or loosened by the rear row of locking bolts; the two rows of scale needles are respectively controlled by the front row of locking bolts and the rear row of locking bolts, and the contour profiling of each row can be quickly realized.
[0026] 5. Threaded blind holes are opened on the front and rear plate surfaces of the middle bottom plate of the main scale, so as to ensure that the front row of locking bolts adjust the spacing without affecting the rear bottom plate, and ensure that the rear row of locking bolts adjust the spacing without affecting the front bottom plate. Limiting strips are arranged longitudinally on both the front and rear plate surfaces of the middle bottom plate and are attached to both sides of each row of scale needles, so as to limit the longitudinal movement of each row of scale needles only and realize contour profiling. The thickness of the limiting strip does not exceed the diameter of the scale needle, which can ensure that the front bottom plate can press the front row of scale needles to lock them, and the rear bottom plate can press the rear row of scale needles to lock them.
[0027] 6. When using the irregular weld inspection ruler to measure an obtuse-angle weld, the front row of scale needles simulates the contour of the weld and the areas on both sides and draws a graph. By processing the intersection of the extended lines of the two side contours to draw a graph, a workpiece graph without welds is obtained. The rear row of scale needles is profiled according to the workpiece graph without welds. The maximum value of the front and rear scale differences of the two rows of scale needles can obtain the fillet weld thickness, and the accurate measurement of various irregular fillet welds such as obtuse-angle welds and acute-angle welds can be quickly realized.
[0028] 7. When using the irregular weld inspection ruler to measure an arc-shaped weld, the front row of scale needles simulates the contour of the weld and the areas on both sides, and the rear row of scale needles is used for profiling the corresponding non-weld areas on the workpiece. The weld thickness is obtained according to the maximum value of the front and rear scale differences of the two rows of scale needles, and the weld width is obtained according to the scale difference on the first scale line corresponding to the two weld toes on the front row of scale needles. The accurate measurement of various irregular arc-shaped welds such as inner arc-shaped welds and outer arc-shaped welds can be quickly realized.
[0029] 8. When using the irregular weld inspection ruler to measure a lap weld, any row of dimensions simulates the contour of the weld and the areas on both sides. The weld width can be obtained according to the scale difference on the first scale line of the two scale needles corresponding to the weld edge. The scale difference between the highest scale needle and the lowest scale needle can obtain the weld height, and the accurate measurement of the lap weld can be quickly realized. Description of the Drawings
[0030] Figure 1Front view of the irregular weld inspection ruler of the present invention
[0031] Figure 2 Top view of the irregular weld inspection ruler of the present invention
[0032] Figure 3 Side view of the irregular weld inspection ruler of the present invention
[0033] Figure 4 Schematic diagram of butt weld measurement in Example 1
[0034] Figure 5 Schematic diagram of weld height measurement of regular fillet weld (right angle) in Example 2
[0035] Figure 6 Schematic diagram of profiling of the front row of gauge pins for regular fillet weld (right angle) in Example 2
[0036] Figure 7 Schematic diagram of the front and rear rows of gauge pins for regular fillet weld (right angle) in Example 2
[0037] Figure 8 Schematic diagram of weld undercut measurement in Example 3
[0038] Figure 9 Schematic diagram of weld misalignment measurement in Example 4
[0039] Figure 10 Schematic diagram of workpiece size measurement in Example 4
[0040] Figure 11 Schematic diagram of profiling of the front row of gauge pins for curved surface weld in Example 5
[0041] Figure 12 Schematic diagram of profiling of the rear row of gauge pins for curved surface weld in Example 5
[0042] Figure 13 Schematic diagram of weld height measurement of irregular fillet weld (obtuse angle) in Example 6
[0043] Figure 14 Schematic diagram of profiling of the front row of gauge pins for irregular fillet weld (obtuse angle) in Example 6
[0044] Figure 15 Schematic diagram of the front and rear rows of gauge pins for irregular fillet weld (obtuse angle) in Example 6
[0045] Figure 16 Schematic diagram of lap joint weld measurement in Example 7
[0046] Wherein: 1 - main scale; 2 - scale needle; 3 - third scale line; 4 - pointed tip; 5 - front base plate; 6 - middle base plate (61 - threaded blind hole); 7 - rear base plate; 8 - front row locking bolts; 9 - rear row locking bolts; 10 - limiting strip; 11 - first scale line; 12 - second scale line; 13 - auxiliary bevel edge; 14 - front mating strip; 15 - rear mating strip. Detailed implementation mode
[0047] The embodiments of the present invention will be described in detail below. The same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.
[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
[0049] The following specific embodiments further illustrate the present invention in detail.
[0050] Embodiment 1
[0051] As Figures 1 to 3 shown, the present invention provides an irregular weld inspection ruler, which includes a long plate-shaped main scale 1 arranged transversely and a scale needle 2 that penetrates through the main scale 1 and can move longitudinally. In this embodiment, the left-right direction in Figure 1 is the transverse direction, and the up-down direction is the longitudinal direction. The thickness of the main scale 1 is perpendicular to Figure 1 the drawing plane direction.
[0052] A first scale line 11 is arranged transversely along the upper edge of the front surface of the main scale 1. Both sides of the main scale are arranged longitudinally. Both upper side corners of the main scale 1 are 90 degrees, and both lower side corners are provided with auxiliary bevel edges 13 with an included angle of 45 degrees with the longitudinal direction. The main scale 1 includes a front base plate 5, a middle base plate 6, and a rear base plate 7 arranged in sequence from front to rear. The three base plates have the same shape, and the first scale line 11 is arranged on the front surface of the front base plate 5.
[0053] The scale needle 2 is arranged longitudinally and pointed tips 4 are provided at both ends. Third scale lines 3 are longitudinally provided on the surface of the scale needle 2 between the two pointed tips 4. Multiple scale needles 2 are densely tiled horizontally in rows for contour profiling. Two rows of scale needles 2 are arranged at intervals in the front-back direction along the thickness direction of the main scale 1. The two rows of scale needles 2 are respectively arranged between the front bottom plate 5 and the middle bottom plate 6 and between the middle bottom plate 6 and the rear bottom plate 7, that is, the front row of scale needles is located between the front bottom plate 5 and the middle bottom plate 6, and the rear row of scale needles is located between the middle bottom plate 6 and the rear bottom plate 7. A locking mechanism for respectively locking each row of scale needles 2 is provided on the main scale 1.
[0054] The locking mechanism includes front row locking bolts 8 that pass through the front bottom plate 5 and are threadedly connected to the middle bottom plate 6. The front row locking bolts 8 are arranged in pairs on both sides of the front bottom plate 5. The front row locking bolts 8 are one pair or multiple pairs arranged at longitudinal intervals. The locking mechanism further includes rear row locking bolts 9 that pass through the rear bottom plate 7 and are threadedly connected to the middle bottom plate 6. The rear row locking bolts 9 are arranged in pairs on both sides of the rear bottom plate 7. The rear row locking bolts 9 are one pair or multiple pairs arranged at longitudinal intervals.
[0055] In this embodiment, both the front row locking bolts 8 and the rear row locking bolts 9 are two pairs. The lower pair of front row locking bolts 8 and rear row locking bolts 9 are both adjacent to the auxiliary hypotenuse 13. Threaded blind holes 61 are opened on the front and rear plate surfaces of the middle bottom plate 6 and are respectively connected corresponding to the front row locking bolts 8 and the rear row locking bolts 9.
[0056] Limit strips 10 are longitudinally provided on both the front and rear plate surfaces of the middle bottom plate 6. The limit strips 10 on each plate surface are attached to both sides of the corresponding row of scale needles 2. That is, the two limit strips 10 on the front plate surface of the middle bottom plate 6 are arranged on the transverse sides of the front row of scale needles 2 to limit the front row of scale needles 2 to move only longitudinally; the two limit strips 10 on the rear plate surface of the middle bottom plate 6 are arranged on the transverse sides of the rear row of scale needles 2 to limit the rear row of scale needles 2 to move only longitudinally.
[0057] The limiting strip 10 extends longitudinally to be flush with the upper and lower ends of the middle bottom plate 6. The thickness of the limiting strip 10 is greater than the radius of the scale needle 2 and does not exceed the diameter of the scale needle 2. In some preferred examples, the front bottom plate 5 and the rear bottom plate 7 are respectively provided with a front mating strip 14 and a rear mating strip 15 along the longitudinal direction on the side facing the middle bottom plate 6. The number of the front mating strip 14 and the rear mating strip 15 is two each. The two front mating strips 14 are respectively attached to and limited by the outer sides of the two limiting strips 10 on the front plate surface of the middle bottom plate 6, and the two rear mating strips 15 are respectively attached to and limited by the outer sides of the two limiting strips 10 on the rear plate surface of the middle bottom plate 6. Therefore, the front mating strip 14 and the two limiting strips 10 on the front plate surface can be butted front and back to form an internally space that is only longitudinally through, further limiting the front row of scale needles 2 therein to prevent leakage from the side of the front bottom plate 5 when the front row of locking bolts 8 is operated too loosely; the two rear mating strips 15 can also be butted front and back with the two limiting strips 10 on the rear plate surface to form an internally space that is only longitudinally through, further limiting the rear row of scale needles 2 therein. The front mating strip 14, the rear mating strip 15 and the limiting strip 10 have the same thickness. As a preferred range, the thickness of the three is 0.8d - 0.95d (d = the diameter of the scale needle 2).
[0058] In a preferred example, one side edge or both side edges of the front surface of the front bottom plate 5 are longitudinally provided with second scale lines 12, and the second scale lines 12 can cooperate with the first scale lines 11 to form a right-angle ruler for measuring the size of the workpiece.
[0059] The above irregular weld inspection ruler can be used to measure conventional butt welds, thereby improving the measurement accuracy:
[0060] The measurement of butt welds is as Figure 4 shown. Any front or rear row of dense scale needles (preferably the front row of scale needles) is abutted against the surface of the weld to be measured in a direction perpendicular to the base metal. The connecting line of the tops of the scale needles can simulate the weld contour. By combining the scale of the scale needles and the scale of the bottom plate, various data of the weld can be read: the height difference between the scale of the scale needle at the weld edge and the scale needle at the highest point in the center of the weld (i.e., the scale difference of the third scale lines 3 of the two scale needles) can be used to measure the weld reinforcement, Figure 4 in which the direction of the weld reinforcement is the vertical direction, that is, the longitudinal distance between the two is obtained by comparing the third scale line 3 on the edge scale needle with the third scale line 3 on the scale needle at the highest point in the center of the weld, which is the weld reinforcement; the scale difference between the scale needles at both edges of the weld corresponding to the first scale line 11 on the bottom plate can be used to measure the weld width, Figure 4 in which the direction of the weld width is the left-right direction.
[0061] Embodiment 2
[0062] The above irregular weld inspection ruler can be used to measure conventional fillet welds (right angles), thereby improving the measurement accuracy:
[0063] From Figure 5As shown, the right-angled side of the main scale 1 is closely attached to the vertical side of the base material and moves downward until it contacts the weld seam. The scale needle points downward and contacts the horizontal plane of the workpiece. The distance between the highest point of the weld seam and the horizontal plane of the workpiece can be obtained from the third scale line 3 of the scale needle, that is, the weld height.
[0064] As shown by Figure 6 shown, the 45° bevel of the main board of the weld seam gauge (auxiliary hypotenuse 13) is flush with the base materials on both sides of the fillet weld. The front row of scale needles is on top of the weld seam surface, simulating the weld seam contour. Draw the contour diagrams of the weld seam and the areas on both sides. On the contour diagram, obtain the workpiece diagram without the weld seam according to the intersection of the extension lines of the workpiece areas on both sides. The rear row of scale needles is profiled according to the workpiece diagram without the weld seam and makes the front and rear rows of scale needles coincide in the areas on both sides of the weld seam. As shown by Figure 7 shown (black front row of scale needles, red rear row of scale needles), the fillet weld thickness is obtained according to the maximum value of the scale difference between the front and rear scale needles. That is, taking the front and rear scale needles as a pair, calculate the scale difference of the third scale line 3 of each pair of scale needles to obtain the distance between each pair of scale needles along the longitudinal direction of the main scale. The maximum value of the scale differences of each pair of scale needles in the weld seam area is the fillet weld thickness. The scale difference of the two scale needles corresponding to the weld seam edge on the first scale line 11 of the front row of scale needles gives the weld width.
[0065] Example 3
[0066] Measurement of weld seam defects such as undercut is as shown by Figure 8 shown. Use any row of scale needles for profiling. The scale difference between the scale needle at the base material of the workpiece and the scale needle at the deepest part of the undercut of the weld seam (that is, the scale difference of the third scale line 3 of the two scale needles) can measure the undercut depth. The scale difference of the first scale line 11 corresponding to the two scale needles at the defect edge can measure the defect width. For defects such as weld spatter, lack of fusion, and depression, the measurement method is the same and will not be elaborated here.
[0067] Example 4
[0068] Measurement of the weld seam misalignment is as shown by Figure 9 shown. After any row of dense scale needles in the front and rear is on top of the measured weld seam surface and the areas on both sides and locked, simulate the contour of the weld seam and the areas on both sides. The scale difference between the scale needles at the base materials on both sides of the weld seam edge (that is, the scale difference of the third scale line 3 of the two scale needles) can measure the weld seam misalignment.
[0069] Measurement of the workpiece size is as shown by Figure 10 shown. The two scale needles are closely attached to the outer radial end of the annular workpiece. The scale difference on the first scale line 11 is the outer diameter of the workpiece. The two scale needles are closely attached to the inner radial end of the annular workpiece. The scale difference on the first scale line 11 is the inner diameter of the workpiece. Use the scale needles to penetrate into the part. The depth of the part can be obtained through the third scale line 3 on the scale needles. Pull the scale needles out of the main scale. The length and width of the part can also be directly measured through the third scale line 3 on the scale needles, or the length and width of the part can be directly measured through the first scale line 11 and the second scale line 12.
[0070] Example 5
[0071] The above irregular weld inspection ruler can be used to measure arc surface welds, thereby achieving accurate measurement of irregular welds:
[0072] The front row of ruler needles are pressed against the weld surface and the two sides to be measured and then locked. Figure 11 As shown in the figure, simulate the contour of the weld and the areas on both sides; move the inspection ruler along the workpiece surface to the area without weld. At this time, the areas on both sides of the weld of the front row of ruler needles coincide with the edge of the workpiece, and push the rear row of ruler needles full against the workpiece, as shown in the figure. Figure 12 As shown, the weld thickness is obtained according to the maximum value of the difference between the front and rear scales of the two rows of rulers, and the weld width is obtained according to the difference between the scales of the two rulers on the front row corresponding to the weld edge on the first scale line 11. Figure 11 , 12 This is the measurement of the outer arc surface weld. The measurement of the inner arc surface weld is the same and will not be repeated here.
[0073] Example 6
[0074] The above irregular weld inspection ruler can be used to measure the corner weld (obtuse angle), thereby realizing the measurement of irregular welds:
[0075] like Figure 13 As shown, the base material is placed horizontally, and the weldment is welded at an obtuse angle on the upper surface of the base material. Any of the front and rear rows of dense rulers are pressed against the surface of the weld to be measured in a direction perpendicular to the base material. The line connecting the top ends of the rulers can simulate the weld contour. The height of the fillet weld can be measured by the scale difference between the ruler at the edge where the weld and the base material meet and the ruler at the highest point in the center of the weld.
[0076] like Figure 14 As shown in the figure, the front row of ruler needles are pressed against the surface of the weld to be measured and the areas on both sides and then locked, and the contour of the fillet weld and the areas on both sides are drawn, as shown in the figure. Figure 15 As shown (black front row of ruler needles, red rear row of ruler needles), on the contour diagram, a workpiece diagram without welds is obtained by intersecting the extension lines of the two side areas, and the rear row of ruler needles is used to copy the workpiece diagram without welds and make the front and rear rows of ruler needles coincide in the two side areas of the weld, and the thickness of the fillet weld is obtained according to the maximum value of the front and rear scale difference of the two rows of ruler needles, that is, the front and rear two rows of ruler needles are taken as a pair, and the scale difference of the third scale line 3 of each pair of ruler needles is calculated to obtain the spacing of each pair of ruler needles along the longitudinal direction of the main scale, and the maximum value of the scale difference of each pair of ruler needles in the weld area is the thickness of the fillet weld; the weld width is obtained according to the scale difference of the two ruler needles on the front row corresponding to the weld edge on the first scale line 11.
[0077] Example 7
[0078] The above irregular weld inspection ruler can be used to measure the lap weld, thus realizing the irregular weld measurement:
[0079] like Figure 16As shown, any row of scale needles is pressed against the surface of the weld to be measured and the areas on both sides in a direction perpendicular to the surface of the base material and then locked, simulating the contour of the weld and the areas on both sides. According to the scale difference between the two scale needles corresponding to the weld edge on the first scale line 11, the weld width is obtained; according to the scale difference between the highest scale needle and the lowest scale needle corresponding to the area of the weld to be measured, the weld height is obtained.
Claims
1. An irregular weld inspection ruler, characterized in that: It comprises a main ruler (1) in the shape of a long plate arranged in the transverse direction and a ruler needle (2) passing through the main ruler (1) and being movable in the longitudinal direction. The front upper edge of the main ruler (1) is provided with a first scale line (11) in the transverse direction, the upper two corners of the main ruler (1) are both 90 degrees, and the lower two corners are both provided with auxiliary bevels (13) with an angle of 45 degrees with the longitudinal direction; Both ends of the ruler needle (2) are provided with a pointed head (4), and a third scale line (3) is provided on the surface of the ruler needle (2) between the two pointed heads (4) along the longitudinal direction. A plurality of ruler needles (2) are horizontally laid out in a row for contour profiling, and two rows of ruler needles (2) are arranged at intervals in the front and rear direction along the thickness direction of the main ruler (1). The main ruler (1) is provided with a locking mechanism capable of locking each row of ruler needles (2) respectively.
2. The irregular weld inspection ruler according to claim 1, characterized in that: The main ruler (1) comprises a front bottom plate (5), a middle bottom plate (6), and a rear bottom plate (7) which are arranged in sequence in the front and rear directions; the first scale line (11) is arranged on the front bottom plate (5); and two rows of ruler needles (2) are respectively arranged between the front bottom plate (5) and the middle bottom plate (6) and between the middle bottom plate (6) and the rear bottom plate (7).
3. The irregular weld inspection ruler according to claim 2, characterized in that: The locking mechanism comprises a front row of locking bolts (8) passing through the front bottom plate (5) and being threadedly connected to the middle bottom plate (6); the front row of locking bolts (8) are arranged in pairs on both sides of the front bottom plate (5); the front row of locking bolts (8) are a pair or a plurality of pairs arranged at longitudinal intervals.
4. The irregular weld inspection ruler according to claim 3, characterized in that: The locking mechanism further comprises a rear row of locking bolts (9) passing through the rear bottom plate (7) and being threadedly connected to the middle bottom plate (6); the rear row of locking bolts (9) are arranged in pairs on both sides of the rear bottom plate (7); the rear row of locking bolts (9) are a pair or a plurality of pairs arranged at longitudinal intervals.
5. The irregular weld inspection ruler according to claim 4, characterized in that: The middle bottom plate (6) is provided with threaded blind holes (61) on the front and rear plate surfaces, which are respectively connected to the front row locking bolts (8) and the rear row locking bolts (9) in correspondence.
6. The irregular weld inspection ruler according to claim 2, characterized in that: The front and rear surfaces of the middle bottom plate (6) are both provided with limit strips (10) along the longitudinal direction. The upper limit strips (10) on each surface are arranged on both sides of the corresponding rows of ruler needles (2). The limit strips (10) extend longitudinally to be flush with the upper and lower ends of the middle bottom plate (6). The thickness of the limit strips (10) is greater than the radius of the ruler needle (2) and does not exceed the diameter of the ruler needle (2).
7. The irregular weld inspection ruler according to claim 6, characterized in that: The front bottom plate (5) and the rear bottom plate (7) are respectively provided with a front matching strip (14) and a rear matching strip (15) along the longitudinal direction on a side adjacent to the middle bottom plate (6); the two front matching strips (14) are respectively fitted with the outer side surfaces of the two limiting strips (10) on the front plate surface of the middle bottom plate (6) for limiting position, and the two rear matching strips (15) are respectively fitted with the outer side surfaces of the two limiting strips (10) on the rear plate surface of the middle bottom plate (6) for limiting position; The front matching strip (14), the rear matching strip (15) and the limiting strip (10) have the same thickness.
8. A method for using the irregular weld inspection ruler as claimed in claim 1, characterized in that: Including fillet weld measurement method, arc weld measurement method, lap weld measurement method; The fillet weld measurement method comprises: the front row of ruler needles are pressed against the surface of the weld to be measured and the areas on both sides and then locked to simulate the contours of the weld and the areas on both sides; the front row of ruler needles are used to draw the contour map of the weld and the areas on both sides; on the contour map, a workpiece map without a weld is obtained by intersecting the extension lines of the areas on both sides; the rear row of ruler needles are used to imitate the workpiece map without a weld and the front and rear rows of ruler needles are made to coincide with each other in the areas on both sides of the weld; the weld thickness is obtained according to the maximum value of the front and rear scale difference of the two rows of ruler needles; the weld width is obtained according to the scale difference of the two ruler needles on the front row corresponding to the weld edge on the first scale line (11).
9. The method for using the irregular weld inspection ruler as claimed in claim 8, characterized in that: The arc surface weld measurement method comprises: the front row of ruler needles are pressed against the surface of the weld to be measured and the areas on both sides and then locked to simulate the contours of the weld and the areas on both sides; the inspection ruler is moved along the workpiece surface to the area without weld, at which time the areas on both sides of the weld of the front row of ruler needles coincide with the edge of the workpiece, the rear row of ruler needles are pressed against the workpiece, the weld thickness is obtained according to the maximum value of the front and rear scale difference of the two rows of ruler needles, and the weld width is obtained according to the scale difference of the two ruler needles on the front row corresponding to the weld edge on the first scale line (11).
10. The method for using the irregular weld inspection ruler as claimed in claim 8, characterized in that: The lap weld measurement method comprises: pressing any row of ruler pins against the surface of the weld to be measured and the areas on both sides in a direction perpendicular to the surface of the base material and then locking them to simulate the contours of the weld and the areas on both sides; obtaining the weld width based on the scale difference between the two ruler pins corresponding to the weld edge on the first scale line (11); and obtaining the weld height based on the scale difference between the highest ruler pin and the lowest ruler pin corresponding to the weld area to be measured.