Device for testing stress of saddle-shaped welding seam

Abstract

The invention discloses a device for testing the stress of a saddle-shaped welding seam, and belongs to the technical field of welding. The device comprises a drill bit and a mounting part used for connecting the drill bit and a workpiece to be detected. And the mounting part comprises a sliding block, a vertical moving mechanism for realizing the movement of the drill bit in the vertical direction, a horizontal moving mechanism for realizing the movement of the drill bit in the horizontal direction, and a drill bit rotating mechanism for realizing the perpendicularity of the drill bit and the detected surface of the workpiece to be detected. According to the device for testing the stress of the saddle-shaped welding seam, the to-be-tested workpiece is connected with the drill bit through the mounting part, the drill bit can move in the vertical direction and the horizontal direction at the same time through the mounting part, and meanwhile the angle of the drill bit is adjusted through the drill bit rotating mechanism to ensure that the drill bit is perpendicular to the detected surface of the to-be-tested workpiece; the blind hole method stress testing device is used for blind hole method stress testing of saddle-shaped welding seams, and can accurately drill holes in a to-be-tested part to obtain a welding residual stress value of the part.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a device for stress testing of a saddle-shaped weld, which is suitable for blind hole stress testing of the saddle-shaped weld. Background Art

[0002] The small diameter pipe cladding structure is a three-dimensional saddle-shaped weld, such as Figure 1 As shown in the figure, the structure consists of three parts, namely the conical structure of the main pipe end, the cylindrical structure of the branch pipe end and the transition section structure of the branch pipe end. Among them, the angle between the conical contour line and the horizontal line is about 45°, the angle between the cylindrical contour line and the horizontal line is about 90°, and the angle between the transition section contour line and the horizontal line is about 45°. The minimum diameter of the upper branch pipe surfacing is about 40mm, and the maximum diameter of the lower main pipe surfacing is about 60mm. The residual stress test analysis of saddle weld is one of the key technologies in the research of saddle weld welding technology.

[0003] The saddle weld is a three-dimensional curved surface, with a cylindrical upper part and a curved surface at the lower part. Figure 2 As shown. During stress testing, the drill bit should be perpendicular to the surface to be tested, and drilling should be stopped after drilling to a certain depth to obtain the stress release value. In order to obtain accurate stress values, it is necessary to ensure that the drill bit and the surface to be tested are perpendicular to each other. The saddle shape is a curved surface. To ensure that the drill bit and the surface to be tested are perpendicular to each other, it is necessary to develop a special saddle weld stress testing device to suit the curved surface angles at different positions of the saddle weld. In view of the special structure of the saddle weld, it is necessary to develop a set of devices for saddle weld stress testing to complete the stress test of the saddle weld. Summary of the invention

[0004] The purpose of the present invention is to provide a device for stress testing of saddle-shaped welds. In response to the needs of stress testing of saddle-shaped special-shaped welds, a blind hole stress test specifically for saddle-shaped welds is provided, which can accurately drill holes in the tested area to obtain the welding residual stress value of the area.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] The present invention provides a device for saddle weld stress testing, comprising: a drill bit and a mounting component for connecting the drill bit and a workpiece to be tested;

[0007] The installation components include:

[0008] slider;

[0009] A vertical moving mechanism, which is arranged on the sliding block, installed on the workpiece to be measured, and used to realize the movement of the drill bit in the vertical direction;

[0010] A horizontal moving mechanism, which is arranged on the sliding block and is used to realize the movement of the drill bit in the horizontal direction;

[0011] A drill bit rotating mechanism, the drill bit rotating mechanism is connected to the horizontal moving structure, and the drill bit rotating mechanism is used to adjust the angle of the drill bit so that the drill bit is perpendicular to the inspected surface of the workpiece to be inspected;

[0012] The drill bit is connected to the drill bit rotating mechanism.

[0013] Further, in the device for saddle weld stress testing, the vertical moving mechanism comprises: a sleeve, a first rotating shaft and a first gear;

[0014] The slider is provided with a mounting hole matched with the sleeve in the vertical direction, and the end of the sleeve is installed in the mounting hole of the slider; the outer side of the sleeve is provided with vertical teeth parallel to the axial direction of the sleeve; the first rotating shaft is horizontally provided on the inner side of the slider, and the first rotating shaft is provided with a first gear, which is meshed with the vertical teeth of the sleeve.

[0015] Furthermore, in the device for saddle weld stress testing, both ends of the first rotating shaft are fixed to the outer side of the sliding block through a pressure plate.

[0016] Further, in the device for saddle weld stress testing, the horizontal movement mechanism comprises: a side plate, a second rotating shaft and a second gear;

[0017] The side plates are arranged in parallel on both sides of the slider, and the side plates include a connected rack portion and a rotating connection portion. The upper end of the rack portion of the side plate is provided with transverse teeth. The second rotating shaft is horizontally arranged on the inner side of the slider, and the second gears are arranged at both ends of the second rotating shaft. The second gears are meshed with the transverse teeth on the rack portion of the side plate.

[0018] Furthermore, in the device for saddle weld stress testing, both ends of the second rotating shaft are fixed to the outside of the slider through a pressure plate, and the side plate is located between the slider and the pressure plate.

[0019] Furthermore, in the device for saddle-shaped weld stress testing, the ends of the rack portions of the side plates on both sides are connected and fixed by support rods.

[0020] Furthermore, in the device for saddle-shaped weld stress testing, the drill bit rotation mechanism is connected between the side plates on both sides through a support plate.

[0021] Furthermore, in the device for stress testing of saddle-shaped welds, arc-shaped holes are correspondingly provided at the rotating connection portions of the side plates on both sides, and the two ends of the support plate are correspondingly installed in the two arc-shaped holes.

[0022] Furthermore, in the device for saddle weld stress testing, the drill bit rotation mechanism includes: a guide member and a drill bit fixture, the guide member is mounted on the support plate, the drill bit fixture is mounted on the guide member, the drill bit is mounted on the drill bit fixture, and the drill bit is gap-fitted with the center circular hole of the guide member.

[0023] Furthermore, in the device for saddle weld stress testing, a locking block for adjusting the depth of the drill bit entering the guide member is provided on the drill bit.

[0024] The present invention has the following beneficial effects:

[0025] The device for stress testing of saddle-shaped welds provided by the present invention connects the workpiece to be tested with the drill bit through a mounting component, and the mounting component can simultaneously realize the movement of the drill bit in the vertical direction and the horizontal direction, and at the same time, the drill bit rotation mechanism is used to adjust the angle of the drill bit to ensure that the drill bit and the tested surface of the workpiece to be tested are perpendicular, and is used for blind hole stress testing of saddle-shaped welds, and can accurately drill holes in the tested part to obtain the welding residual stress value of the part. The device for stress testing of saddle-shaped welds provided by the present invention has various mechanisms that are tightly connected to ensure the rigidity and strength requirements, and the device is simple in structure, light and compact, and easy to carry and transport. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0027] Figure 1 It is a saddle-shaped weld surfacing structure diagram in the background technology of the present invention;

[0028] Figure 2 It is a schematic diagram of the saddle-shaped weld structure in the background technology of the present invention;

[0029] Figure 3 It is a front view structural schematic diagram of the device for saddle weld stress testing of the present invention;

[0030] Figure 4 It is a side structural schematic diagram of the device for saddle weld stress testing of the present invention;

[0031] Figure 5 The structure of the installation components in the device for saddle weld stress testing of the present invention is schematically shown. Figure 1 ;

[0032] Figure 6 The structure of the installation components in the device for saddle weld stress testing of the present invention is schematically shown. Figure 2 ;

[0033] Figure 7 The structure of the installation components in the device for saddle weld stress testing of the present invention is schematically shown. Figure 3 ;

[0034] Figure 8 The local structure of the installation components in the device for saddle weld stress testing of the present invention is shown in FIG. Figure 1 ;

[0035] Fig. 9 The local structure of the installation components in the device for saddle weld stress testing of the present invention is shown in FIG. Figure 2 ;

[0036] Fig.10 The local structure of the installation components in the device for saddle weld stress testing of the present invention is shown in FIG. Figure 3 ;

[0037] Fig.11 It is a structural schematic diagram of a slider in the device for saddle-shaped weld stress testing of the present invention.

[0038] Marks and corresponding parts names in the attached drawings:

[0039] In the figure: 10-slider, 21-sleeve, 22-first rotating shaft, 23-first gear, 24-pressing plate, 31-side plate, 311-arc hole, 32-second rotating shaft, 33-second gear, 34-support rod, 41-support plate, 42-guide member, 43-drill fixture, 5-workpiece to be measured. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The analysis and research of residual stress in saddle weld is one of the key technologies in the research of saddle weld welding technology. The saddle weld has a special structure. During stress testing, the drill needle should be perpendicular to the surface to be tested, and the drilling should be stopped after drilling to a certain depth, so as to obtain the stress release value. In order to obtain accurate stress values, it is necessary to ensure that the drill needle and the surface to be tested are perpendicular to each other, and a special saddle weld stress testing device is provided. The blind hole method stress test specially used for saddle welds is provided to adapt to the curved surface angles at different positions of the saddle weld, and the test part can be accurately drilled to obtain the welding residual stress value of the part.

[0043] Example

[0044] Please refer to Figure 3-11 As shown, an embodiment of the present invention provides a device for saddle weld stress testing, comprising: a drill bit and a mounting component for connecting the drill bit and a workpiece 5 to be tested;

[0045] The installation components include:

[0046] Slider 10;

[0047] A vertical moving mechanism, which is arranged on the slider 10 and mounted on the workpiece 5 to be measured, and is used to realize the movement of the drill bit in the vertical direction;

[0048] A horizontal moving mechanism, which is arranged on the slider 10 and is used to realize the movement of the drill bit in the horizontal direction;

[0049] A drill bit rotating mechanism, the drill bit rotating mechanism is connected to the horizontal moving structure, and the drill bit rotating mechanism is used to adjust the angle of the drill bit so that the drill bit is perpendicular to the inspected surface of the workpiece 5 to be inspected;

[0050] The drill bit is connected to the drill bit rotating mechanism.

[0051] The device for stress testing of saddle weld provided by the present invention connects the workpiece 5 to be tested with the drill bit through a mounting component, and the mounting component can simultaneously realize the movement of the drill bit in the vertical direction and the horizontal direction, and at the same time, the drill bit rotation mechanism is used to adjust the angle of the drill bit to ensure that the drill bit and the tested surface of the workpiece 5 to be tested are perpendicular, and is used for blind hole stress testing of saddle welds, and can accurately drill holes in the tested part to obtain the welding residual stress value of the part. The device for stress testing of saddle weld provided by the present invention has various mechanisms that are tightly connected to ensure the rigidity and strength requirements, and the device is simple in structure, light and compact, and easy to carry and transport.

[0052] In some feasible implementations, the vertical movement mechanism includes: a sleeve 21, a first rotating shaft 22 and a first gear 23;

[0053] The slider 10 is provided with a mounting hole adapted to the sleeve in the vertical direction, and the end of the sleeve 21 is installed in the mounting hole of the slider 10; the outer side of the sleeve 21 is provided with vertical teeth parallel to the axial direction of the sleeve 21; the inner side of the slider 10 is provided with the first rotating shaft 22 horizontally, and the first rotating shaft 22 is provided with a first gear 23, and the first gear 23 is meshed with the vertical teeth of the sleeve 21. In this embodiment, the vertical teeth provided on the sleeve 21 are meshed with the first gear 23 provided in the slider 10, and the first rotating shaft 22 is adjusted to drive the first gear 23 to rotate and then drive the slider 10 to move along the axial direction of the sleeve 21, and the drill bit moves simultaneously with the vertical moving mechanism, thereby realizing the movement of the drill bit in the vertical direction.

[0054] In some feasible implementations, both ends of the first rotating shaft 22 are fixed to the outside of the slider 10 through a pressing plate 24. Specifically, the pressing plate 24 is fixed to the outside of the slider 10 through an adjusting bolt, and the pressing plate 24 can be fastened to the slider 10 through the adjusting bolt to limit the first rotating shaft 22.

[0055] In some feasible implementations, the horizontal movement mechanism includes: a side plate 31, a second rotating shaft 32 and a second gear 33;

[0056] The side plates 31 are arranged in parallel on both sides of the slider 10. The side plates 31 include a connected rack portion and a rotating connection portion. The upper end of the rack portion of the side plates 31 is provided with a transverse tooth. The second rotating shaft 32 is horizontally arranged inside the slider 10. The second gears 33 are arranged at both ends of the second rotating shaft 32. The second gears 33 are meshed with the transverse teeth on the rack portion of the side plates 31. In this embodiment, the transverse teeth arranged on the side plates 31 are meshed with the second gears 33 arranged in the slider 10. By adjusting the second rotating shaft 32, the second gears 33 are driven to rotate and then the side plates 31 are driven to move in the horizontal direction. The drill bit moves simultaneously with the horizontal moving mechanism, thereby realizing the movement of the drill bit in the horizontal direction.

[0057] In some feasible implementations, both ends of the second rotating shaft 32 are fixed to the outside of the slider 10 through the pressing plate 24, and the side plate 31 is located between the slider 10 and the pressing plate 24. Specifically, the pressing plate 24 is fixed to the outside of the slider 10 through the adjusting bolts, and the pressing plate 24 can be fastened to the slider 10 through the adjusting bolts to limit the position of the second rotating shaft 32.

[0058] In some feasible implementations, the ends of the racks of the side panels 31 on both sides are connected and fixed by the support rods 34. Specifically, the ends of the racks of the side panels 31 on both sides are fixed to the support rods 34 by adjusting bolts, thereby improving the stability of the movement of the side panels 31 during horizontal adjustment.

[0059] In some feasible implementations, the drill bit rotating mechanism is connected between the two side plates 31 via a support plate 41 .

[0060] In some feasible implementations, the rotating connection parts of the side plates 31 on both sides are correspondingly provided with arc holes 311, and the two ends of the support plate 41 are correspondingly installed in the two arc holes 311. Specifically, the arc holes 311 are used for the drill rotating mechanism to adjust the angle of the drill.

[0061] In some feasible embodiments, the drill bit rotating mechanism includes: a guide member 42 and a drill bit fixture 43, wherein the guide member 42 is mounted on the support plate 41, the drill bit fixture 43 is mounted on the guide member 42, the drill bit is mounted on the drill bit fixture 43, and the drill bit is gap-matched with the central circular hole of the guide member 42. In this embodiment, the guide member 42 is arranged on the side plate 31, and the angle of the arc hole 311 is set to 90° for the convenience of angle adjustment, and a 90° guide rail is provided. An adjusting bolt is also arranged in the arc hole 311, and the angle adjustment of the guide member 42 can be realized by adjusting the position of the bolt in the arc hole 311, thereby adjusting the angle of the drill bit.

[0062] In some feasible embodiments, the drill bit is provided with a locking block (the structure of the locking block is not indicated) for adjusting the depth of the drill bit entering the guide member 42. In this embodiment, the locking block 18 is locked on the drill bit to adjust the depth of the drill bit entering the guide member 42. In addition, a locking block is also provided at the bottom of the sleeve 21 to limit the position of the first gear 23; a locking block is also provided in the slider 10, which is located on both sides of the sleeve 21 and the length of the locking block is adapted to the width of the slider 10, so as to adjust the horizontal movement distance of the side plate 31 in the slider 10.

[0063] The device for stress testing of saddle weld provided by the present invention, before blind hole stress testing of saddle weld, after completing the installation of the device and the workpiece 5 to be tested, a strain gauge is attached to the strain point to be tested of the workpiece 5 to be tested, the circuit and the strain data collector are connected, the drill bit rotates to drill the position of the strain gauge test point and the metal to be tested to release the residual stress of the metal at this point, and the strain data collector collects the residual stress data through the strain gauge. The specific work implementation process is:

[0064] Step 1: Before use, install and connect the device and check and confirm.

[0065] Step 2: Fix the device in a suitable position, use a microscope of suitable size to put it into the guide 42, adjust the vertical, horizontal and angle so that the corresponding drilling points on the strain gauge can be clearly seen on the microscope.

[0066] Step 3: Place the drill bit into the guide 42 so that the top of the drill bit just touches the corresponding drilling point. Move the locking block upward by about 2 mm and then tighten it. Use a specific machine to drive the drill bit to drill.

[0067] Step 4: During and after drilling, the strain gauges collect strain data.

[0068] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for saddle weld stress testing, characterized in that: include: A drill bit and a mounting component for connecting the drill bit and a workpiece to be measured; The installation components include: slider; A vertical moving mechanism, which is arranged on the sliding block, installed on the workpiece to be measured, and used to realize the movement of the drill bit in the vertical direction; A horizontal moving mechanism, which is arranged on the sliding block and is used to realize the movement of the drill bit in the horizontal direction; A drill bit rotating mechanism, the drill bit rotating mechanism is connected to the horizontal moving structure, and the drill bit rotating mechanism is used to adjust the angle of the drill bit so that the drill bit is perpendicular to the inspected surface of the workpiece to be inspected; The drill bit is connected to the drill bit rotating mechanism.

2. The device for saddle weld stress testing according to claim 1, characterized in that: The vertical movement mechanism comprises: a sleeve, a first rotating shaft and a first gear; The slider is provided with a mounting hole matched with the sleeve in the vertical direction, and the end of the sleeve is installed in the mounting hole of the slider; the outer side of the sleeve is provided with vertical teeth parallel to the axial direction of the sleeve; the first rotating shaft is horizontally provided on the inner side of the slider, and the first rotating shaft is provided with a first gear, which is meshed with the vertical teeth of the sleeve.

3. The device for saddle weld stress testing according to claim 2, characterized in that: Both ends of the first rotating shaft are fixed to the outer side of the sliding block through a pressing plate.

4. The device for saddle weld stress testing according to claim 1, characterized in that: The horizontal movement mechanism comprises: a side plate, a second rotating shaft and a second gear; The side plates are arranged in parallel on both sides of the slider, and the side plates include a connected rack portion and a rotating connection portion. The upper end of the rack portion of the side plate is provided with transverse teeth. The second rotating shaft is horizontally arranged on the inner side of the slider, and the second gears are arranged at both ends of the second rotating shaft. The second gears are meshed with the transverse teeth on the rack portion of the side plate.

5. The device for saddle weld stress testing according to claim 4, characterized in that: Both ends of the second rotating shaft are fixed to the outer side of the sliding block through a pressing plate, and the side plate is located between the sliding block and the pressing plate.

6. The device for saddle weld stress testing according to claim 4, characterized in that: The ends of the rack parts of the side plates at both sides are connected and fixed by support rods.

7. The device for saddle weld stress testing according to claim 4, characterized in that: The drill bit rotating mechanism is connected between the side plates at both sides through a supporting plate.

8. The device for saddle weld stress testing according to claim 7, characterized in that: The rotating connection parts of the two side plates are correspondingly provided with arc holes, and the two ends of the support plate are correspondingly installed in the two arc holes.

9. The device for saddle weld stress testing according to claim 7, characterized in that: The drill bit rotating mechanism comprises: a guide member and a drill bit fixture, wherein the guide member is mounted on the support plate, the drill bit fixture is mounted on the guide member, the drill bit is mounted on the drill bit fixture, and the drill bit and the central circular hole of the guide member form a clearance fit.

10. The device for saddle weld stress testing according to claim 9, characterized in that: The drill bit is provided with a locking block for adjusting the depth of the drill bit entering the guide member.

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