阅读说明：本技术 X型坡口的焊道根部工艺检验尺及其制作方法和使用方法 (Welding bead root process inspection ruler for X-shaped groove and manufacturing method and using method thereof ) 是由 李勇 刘勇 潘秦 奚宝成 杨泽钰 蔡莼 周福斌 顾振强 黄雪强 于 2020-03-13 设计创作，主要内容包括：本发明公开了一种X型坡口的焊道根部工艺检验尺及其制作方法和使用方法,所述X型坡口包括位于正面的第一坡口和位于反面的第二坡口,所述检验尺为两侧面与所述第二坡口内侧面相配合的V形板状结构,所述V形板状结构的尖端部为弧形头,所述弧形头的弧面两侧分别与所述检验尺的两侧面相切,且所述弧形头的宽度与所述第一坡口和所述第二坡口的交叉处的宽度相同。本发明的X型坡口的焊道根部工艺检验尺结构简单,可以方便快速的对先前焊接的坡口的清根效果进行检测,便于快速判断是否将坡口两边未熔合焊渣进行再次清根处理。通过该检验尺修整坡口可做到背面坡口加工的标准化,有效地提升了焊缝内部焊接质量以及焊接效率。(The invention discloses a welding bead root process inspection ruler with an X-shaped groove, a manufacturing method and a using method thereof, wherein the X-shaped groove comprises a first groove positioned on the front side and a second groove positioned on the back side, the inspection ruler is of a V-shaped plate-shaped structure, two side surfaces of the V-shaped plate-shaped structure are matched with the inner side surface of the second groove, the tip end of the V-shaped plate-shaped structure is an arc-shaped head, two sides of the arc surface of the arc-shaped head are respectively tangent to two side surfaces of the inspection ruler, and the width of the arc-shaped head is the same as the width of the intersection of the first groove and the second groove. The test ruler for the welding bead root process of the X-shaped groove has a simple structure, can conveniently and quickly detect the back gouging effect of the previously welded groove, and is convenient for quickly judging whether to carry out the back gouging treatment on the unfused welding slag on two sides of the groove again. The standardization of back groove processing can be achieved by finishing the groove through the inspection ruler, and the welding quality and the welding efficiency inside the welding seam are effectively improved.)

1. The utility model provides a welding bead root technology inspection chi of X type groove, X type groove is including being located positive first groove and being located the second groove of reverse side, its characterized in that, inspection chi for both sides face with second groove medial surface matched with V shaped plate column structure, V shaped plate column structure's pointed end is the arc head, the cambered surface both sides of arc head respectively with the both sides face of inspection chi is tangent, just the width of arc head with first groove with the width of the cross section of second groove is the same.

2. The X-groove weld bead root process check rule of claim 1, wherein the height of said check rule is greater than the depth of said second groove.

3. The X-groove weld bead root process inspection ruler according to claim 1, wherein a graduation is provided on a bisector of the ruler body in a height direction thereof, and a starting point of the graduation is a point on the bisector at which an arc surface of the arc head is located.

4. The X-groove weld bead root process inspection ruler according to claim 1, wherein a level is provided at an end of the ruler body of the inspection ruler away from the arc-shaped head, and a length direction of the level is perpendicular to a height direction of the inspection ruler.

5. The X-groove weld bead root process inspection ruler according to any one of claims 1 to 4, wherein a hanging hole is provided at an end of the ruler body of the inspection ruler away from the arc-shaped head.

6. The method for manufacturing the bead root process inspection ruler for the X-groove according to claim 1, comprising the steps of:

s11, determining related parameters of the groove according to the thickness of the steel plate;

s12, selecting the diameter of a welding gun nozzle, the length of a welding wire and the swing angle of the welding gun nozzle according to the related parameters of the second groove, and determining the forming coefficient of the welding seam, wherein: the weld forming coefficient refers to the ratio of the width of a weld to the depth of the weld on the cross section of a single weld during fusion welding;

s13, obtaining the length and the width of the arc-shaped head and the height of the check ruler through the weld forming coefficient;

and S14, processing according to the data obtained in S13 to obtain the inspection ruler.

7. The method of claim 6, wherein the parameters associated with the second groove include groove angle and groove depth.

8. The method of making a weld bead root process check rule for an X-groove according to claim 6, wherein the weld form factor is not greater than 1.1.

9. The method of using the X-groove weld bead root process inspection ruler of claim 1, comprising the steps of:

s21, placing one end of the arc-shaped head of the inspection ruler into a second groove, and enabling a bisector in the height direction of the inspection ruler to coincide with a bisector of the X-shaped groove;

s22, judging whether the arc-shaped head of the inspection ruler can smoothly pass through the intersection of the first groove and the second groove to enter the first groove to obtain an inspection result;

and S23, judging whether to further carry out carbon arc gouging back gouging treatment on the weld bead root of the X-shaped groove according to the obtained inspection result so as to finish the groove.

Technical Field

The invention relates to a weld bead root process inspection ruler of an X-shaped groove and a manufacturing method and a using method thereof.

Background

The thickness of the crack arrest steel for the large container ship generally exceeds 60mm, because the vertical position welding seams of a large thick plate at a dock carrying section are more, the adopted welding method is generally mature semi-automatic FCAW welding (flux-cored arc welding), the groove form is an X-shaped groove, the welding sequence is that one surface is welded firstly after preheating, and the other surface can be welded after carbon arc gouging back chipping, groove trimming, polishing and preheating. Because the root cleaning surface adopts the manual carbon arc gouging, the depth of the groove on the other surface is larger than half of the thickness of the steel plate after the root cleaning, and a narrow and deep groove shape is formed, as shown in figure 1.

When the other side of the steel plate is welded, a welding gun transversely swings during welding, and because the distance between the grooves is small, the nozzles of the welding gun are easily clamped and the movement is limited, so that the two sides of the grooves are not fused. The method not only can influence the qualification rate of nondestructive testing inside the welding seam, but also can lead to the reduction of the mechanical property index of the material and the increase of welding working hours due to repeated heating during the later-stage repair of the welding seam, and increases the manufacturing cost of products. Therefore, before welding the other surface, the back chipping effect of the groove welded previously needs to be detected, unfused welding slag on two sides of the groove is cleaned, and the groove is finished. In the prior art, most of the methods are carried out by visual observation or by using a ray inspection or ultrasonic inspection mode, the inspection method of the former is inaccurate, and the detection method of the latter not only wastes time and improves the detection cost, but also is inconvenient to use and cannot be used under specific conditions.

Disclosure of Invention

The invention aims to overcome the defect that the welding defect of a groove cannot be simply, conveniently and quickly detected in the prior art, and provides a welding bead root process detection ruler for an X-shaped groove and a manufacturing method and a using method thereof.

The invention solves the technical problems through the following technical scheme:

the utility model provides a welding bead root technology inspection chi of X type groove, X type groove is including being located positive first groove and being located the second groove of reverse side, its characterized in that, inspection chi for both sides face with second groove medial surface matched with V shaped plate column structure, V shaped plate column structure's pointed end is the arc head, the cambered surface both sides of arc head respectively with the both sides face of inspection chi is tangent, just the width of arc head with first groove with the width of the cross section of second groove is the same.

Preferably, the height of the inspection ruler is greater than the depth of the second groove.

Preferably, the ruler body of the inspection ruler is provided with a scale along a middle dividing line in the height direction, and the starting point of the scale is a point of the arc surface of the arc head on the middle dividing line.

Preferably, a level meter is arranged at one end, far away from the arc-shaped head, of the body of the inspection ruler, and the length direction of the level meter is perpendicular to the height direction of the inspection ruler.

Preferably, a hanging hole is formed in one end, far away from the arc-shaped head, of the ruler body of the inspection ruler.

The manufacturing method of the welding bead root process inspection ruler with the X-shaped groove is characterized by comprising the following steps of:

s11, determining related parameters of the second groove according to the thickness of the steel plate;

s12, selecting the diameter of a welding gun nozzle, the length of a welding wire and the swing angle of the welding gun nozzle according to the related parameters of the second groove, and determining the forming coefficient of the welding seam, wherein: the weld forming coefficient refers to the ratio of the width of a weld to the depth of the weld on the cross section of a single weld during fusion welding;

s13, obtaining the length and the width of the arc-shaped head and the height of the check ruler through the weld forming coefficient;

and S14, processing according to the data obtained in S13 to obtain the inspection ruler.

Preferably, the relevant parameters of the second bevel include the angle of the bevel and the depth of the bevel.

Preferably, the weld forming coefficient is not greater than 1.1.

The use method of the welding bead root process inspection ruler for the X-shaped groove is characterized by comprising the following steps of:

s21, placing one end of the arc-shaped head of the inspection ruler into a second groove, and enabling a bisector in the height direction of the inspection ruler to coincide with a bisector of the X-shaped groove;

s22, judging whether the arc-shaped head of the inspection ruler can smoothly pass through the intersection of the first groove and the second groove to enter the first groove to obtain an inspection result;

and S23, judging whether to further carry out carbon arc gouging back gouging treatment on the weld bead root of the X-shaped groove according to the obtained inspection result so as to finish the groove.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows: the test ruler for the welding bead root process of the X-shaped groove has a simple structure, can conveniently and quickly detect the back gouging effect of the previously welded groove, and is convenient for quickly judging whether to carry out the back gouging treatment on the unfused welding slag on two sides of the groove again. The standardization of back groove processing can be achieved by finishing the groove through the inspection ruler, and the welding quality and the welding efficiency inside the welding seam are effectively improved.

Drawings

Fig. 1 is a schematic diagram of a back gouging groove after FCAW welding of a steel plate in the prior art.

Fig. 2 is a schematic structural view of a bead root process inspection ruler of an X-groove in a preferred embodiment of the present invention.

FIG. 3 is a schematic diagram of the welding gun oscillating before welding after FCAW back gouging is performed on the steel plate according to the preferred embodiment of the present invention.

Description of reference numerals:

inspection ruler 1

Ruler body 11

Arc head 12

Level meter 13

Hanging hole 14

Steel plate 2

First bevel 21

Second bevel 22

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

As shown in fig. 2, the X-groove comprises a first groove 21 located on the front side and a second groove 22 located on the back side, the inspection ruler 1 is a V-shaped plate structure with two side surfaces matched with the inner side surface of the second groove 22, the tip of the V-shaped plate structure is an arc head 12, two sides of the arc surface of the arc head 12 are respectively tangent to the two side surfaces of the inspection ruler 1, and the width of the arc head 12 is the same as the width of the intersection of the first groove 21 and the second groove 22.

In this embodiment, the V-shaped plate structure of the inspection ruler 1 is used to match the second groove 22 of the X-shaped groove. When the device is used, welding is firstly completed on the first groove 21 of one end face of the steel plate 2, back gouging is conducted on the second groove 22 of the other end face, then the arc-shaped head 12 of the inspection ruler 1 is placed in the second groove 22 after back gouging, and whether back gouging is continuously conducted or not is judged according to whether the arc-shaped head 12 can penetrate through the intersection of the first groove 21 and the second groove 22.

The height of the check ruler 1 is larger than the depth of the second groove 22 in the X-shaped groove. In this embodiment, since the depth of the groove which is not welded on the other side is greater than the depth of the second groove 22 before the groove starts to be welded after the groove is back-gouged, the height of the inspection rule 1 is greater than the depth of the second groove 22 for the convenience of using the inspection rule 1.

The middle dividing line of the body 11 of the inspection ruler 1 along the height direction is provided with a scale, and the starting point of the scale is a point on the middle dividing line of the cambered surface of the cambered head 12. In this embodiment, the scale is set to facilitate observation of the depth of the groove to be inspected after the back gouging process is performed, so as to obtain the depth of the weld when welding is performed after the back gouging process is performed.

A level meter 13 is arranged at one end, far away from the arc-shaped head 12, of the ruler body 11 of the inspection ruler 1, and the length direction of the level meter 13 is perpendicular to the height direction of the inspection ruler 1. This is to prevent the bevel angle from being reduced by axial angular displacement of the hand-held test rule 1 with respect to the second bevel face X, Y during measurement.

The end of the body 11 of the test ruler 1 far away from the arc head 12 is provided with a hanging hole 14. The key ring or the rope belt is convenient to install and carry.

Taking a steel plate 2 with a thickness of 80mm as an example, as shown in fig. 3, before welding, the depths H of the first groove 21 and the second groove 22 on both sides of the S1 surface and the S2 surface are both 40mm, after the welding of the first groove 21 on the S1 surface is completed, the welding part of the first groove 21 needs to be back gouged from the second groove 22 on the S2 surface, and as the groove of the FCAW welding obtains a larger value of the weld forming coefficient even if smaller welding parameters are adopted, wherein the weld forming coefficient refers to the ratio of the weld width (B) to the weld depth (H) on the cross section of a single weld during fusion weldingIt is generally desired to obtain a weld seamForm factorFor convenience of calculation, we take in this exampleThe width B of the welding seam is not less than 10mm, therefore, the groove depth of the S2 surface at this time is not less than 50mm (H +10mm), that is, the height of the inspection ruler 1 is not less than 50mm, the angle design of the inspection ruler 1 should consider the wire extension length L (related to the diameter of the welding wire, generally not more than 20mm), the diameter of the nozzle (20 mm), the angle (point a and point B) at which the welding wire swings to the two sides of the intersection of the first groove 21 and the second groove 22 is the minimum swing interval of the welding gun), the width of the arc-shaped head 12 is the same as the width of the welding seam (B), the height of the arc-shaped head 12 is not more than the depth (H) of the welding seam, when the inspection ruler 1 is used, if the arc-shaped head 12 can smoothly pass through the intersection of the first groove 21 and the second groove 22 to enter the first groove 21 after back gouging, the back gouging.

In this embodiment, the method for manufacturing the inspection ruler 1 includes the following steps:

s11, determining related parameters of the second groove 22 according to the thickness of the steel plate 2, wherein the related parameters of the second groove 22 comprise the angle of the groove and the depth of the groove;

s12, selecting the diameter of a welding gun nozzle, the length of a welding wire and the swing angle of the welding gun nozzle according to the relevant parameters of the second groove 22, and determining the forming coefficient of the welding seam, wherein: the weld forming coefficient refers to the ratio of the width of the weld to the depth of the weld on the cross section of a single weld during fusion welding, and the weld forming coefficientNot more than 1.1, in the present example, take

S13, obtaining the length and width of the arc-shaped head 12 and the height of the inspection ruler 1 through the weld forming coefficient;

and S14, processing according to the data obtained in S13 to obtain the inspection ruler 1.

In this embodiment, the method for using the inspection ruler 1 includes the following steps:

s21, placing one end of the arc-shaped head 12 of the inspection ruler 1 into the second groove 22, and enabling the middle dividing line in the height direction of the inspection ruler 1 to coincide with the middle dividing line of the X-shaped groove;

s22, judging whether the arc-shaped head 12 of the inspection ruler 1 can smoothly pass through the intersection of the first groove 21 and the second groove 22 to enter the first groove 21 to obtain an inspection result;

and S23, judging whether to further carry out carbon arc gouging back gouging treatment on the weld bead root of the X-shaped groove according to the obtained detection result so as to finish the groove.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.