CN111398061A - Circular axial sleeving weld joint damage torque testing method - Google Patents
Circular axial sleeving weld joint damage torque testing method Download PDFInfo
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- CN111398061A CN111398061A CN202010207584.5A CN202010207584A CN111398061A CN 111398061 A CN111398061 A CN 111398061A CN 202010207584 A CN202010207584 A CN 202010207584A CN 111398061 A CN111398061 A CN 111398061A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
Abstract
The invention relates to the technical field of welding, and particularly discloses a circular axial sleeving welding line destructive torque testing method which comprises the steps of extracting actual welding parameters of an actual transmission structure; establishing a simulation model; respectively manufacturing a first sample piece and a second sample piece based on a simulation model, wherein the first sample piece comprises a cylindrical first welding section and a regular prism-shaped first clamping section, and the second sample piece comprises a cylindrical second welding section and a regular prism-shaped second clamping section; assembling the first sample piece and the second sample piece, welding a welding line to be welded through an actual welding process and forming a test welding line; manufacturing a clamping fixture, wherein the clamping fixture comprises a first clamping piece capable of being sleeved on the first clamping section and a second clamping piece capable of being sleeved on the second clamping section; and clamping the test transmission structure to a torque testing machine and carrying out destructive torque test. Because the shapes of the first clamping section and the second clamping section are regular prism shapes, the first clamping piece and the second clamping piece are simple in structural design, and cost can be effectively reduced.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a circular axial sleeving welding line destructive torque testing method.
Background
In the design and manufacture of parts of an automobile transmission system, welding is the most common technique for realizing reliable connection between two parts. On the premise that the product is reasonable in structural design and meets requirements of relevant manufacturing processes, the circular axial sleeved connection structure has the advantages of being simple and convenient in design, easy to guarantee manufacturing precision, convenient to arrange and the like, and is commonly used in welding manufacturing of parts such as a flexible disk and a spline hub, a clutch housing and a hub, a transmission gear and a combination gear, a small differential housing and a driven gear, and the like, and two parts form a transmission structure through welding so as to transmit torque and transmit power.
The maximum bearing torque of the welding line of the transmission structure is one of very important design input conditions, and the product design accuracy can be improved to the greatest extent. In the actual product design process, the weld distribution and strength design are mostly determined by the standard alignment, theoretical calculation, simulation analysis and other related information of similar products. The strength of the welding seam of the actual sample piece is determined by the design factors and also influenced by various welding process parameters, and in order to ensure the safety of the whole structure of the welded sample piece, the selected safety factor is higher during product design calculation, so that the manufactured sample piece generally has an over-strong design phenomenon. In general, over-robust designs are accompanied by increased manufacturing costs.
Therefore, in order to eliminate the over-strong design, the actual sample piece needs to be subjected to a destructive torque test to obtain the maximum bearing torque of the actual sample piece weld. However, on one hand, due to the influence of the structural form of the product, the actual sample piece is generally complex in structure and irregular in shape, and if the actual sample piece is used for the destructive torque test, a destructive torsion test fixture which is matched with the actual sample piece in shape and has a complex structure needs to be designed and manufactured, which will increase the test cost and difficulty at the same time. On the other hand, in the process of testing the weld joint failure torque by adopting an actual sample piece, the position where the failure occurs firstly is often in a non-welding area due to the influence of various factors such as the shape, the rigidity and the like of a welded part, so that the failure torque of the sample piece weld joint is tested, and the accurate maximum bearing torque cannot be obtained.
Therefore, a new method for testing the weld joint damage torque is urgently needed to be developed, the problem that the circular axial sleeve joint weld joint damage torque of the automobile transmission structure cannot be accurately obtained is solved, meanwhile, the precision of product design can be improved, the over-strong design is reduced, and the cost is reduced in the production process.
Disclosure of Invention
The invention aims to: the method is used for solving the problems that in the related technology, the damage torque test is carried out by adopting an actual sample piece, the test cost and the test difficulty are high due to the fact that the test is influenced by various factors such as the shape and the rigidity of a welded part and a complex torque test clamp needs to be matched.
The invention provides a circular axial sleeving welding line damage torque test method, which comprises the following steps:
s10: extracting actual welding parameters of an actual transmission structure;
the actual transmission structure comprises a first workpiece and a second workpiece, the first workpiece is sleeved on the second workpiece, a round actual welding seam is formed between the first workpiece and the second workpiece through welding, and the actual welding parameters comprise the actual radius of the actual welding seam, the actual depth of the actual welding seam and the actual welding process for welding the actual welding seam;
s20: establishing a simulation model;
the simulation model comprises a geometric model of a first sample piece and a geometric model of a second sample piece, the first sample piece comprises a first cylindrical welding section and a first clamping section in a regular prism shape, the central line of the first welding section is overlapped with the central line of the first clamping section, the second sample piece comprises a second cylindrical welding section and a second clamping section in a regular prism shape, the central line of the second welding section is overlapped with the central line of the second clamping section, a cylindrical mounting groove is formed in the first welding section, and the second welding section can be inserted into the mounting groove;
s30: respectively manufacturing the first sample piece and the second sample piece based on the simulation model;
s40: assembling the first and second samples;
inserting the second welding section of the second sample piece into the mounting groove of the first sample piece, and forming a welding seam to be welded between the outer peripheral surface of the second welding section and the inner wall of the mounting groove;
s50: welding the welding line to be welded through the actual welding process and forming a test welding line;
welding the first sample piece and the second sample piece to obtain a test transmission structure, wherein the radius of the test welding line is equal to the actual radius, and the depth of the test welding line is equal to the actual depth;
s60: manufacturing a clamping fixture;
the clamping fixture comprises a first clamping piece and a second clamping piece, the first clamping piece can be sleeved on the first clamping section and can limit the first sample piece to rotate along the circumferential direction of the first welding section, and the second clamping piece can be sleeved on the second clamping section and can limit the second sample piece to rotate along the circumferential direction of the second welding section;
s70: clamping the test transmission structure to a torque testing machine and carrying out destructive torque testing;
the torque testing machine comprises a fixed end and a rotating end, wherein the fixed end and the rotating end are fixedly arranged, and the first clamping piece is clamped at the rotating end; clamping the second clamping member to the fixed end; sleeving the first clamping piece on the first clamping section; sleeving the second clamping piece on the second clamping section; rotating the rotating end at a preset angular speed and stopping until the test welding seam is damaged; and acquiring a torque value output by the rotating end when the test welding line is damaged as the maximum bearing torque of the actual welding line of the actual transmission structure.
As an optimal technical scheme of the circular axial sleeving weld joint failure torque testing method, the first clamping piece and the second clamping piece are both made of medium carbon modulation steel.
As a preferred technical scheme of the circular axial sleeving welding seam failure torque testing method, the rotating end is provided with a first slot, the first clamping piece is connected with the first slot in an inserting mode, the outline of the first clamping piece and the outline of the first slot are in a regular prism shape, the fixed end is provided with a second slot, the second clamping piece is connected with the second slot in an inserting mode, and the outline of the second clamping piece and the outline of the second slot are in a regular prism shape.
As an optimal technical scheme of the circular axial sleeving welding line destructive torque testing method, the preset angular speed is 1-30 DEG/min.
As a preferred technical scheme of the circular axial sleeving weld joint failure torque testing method, the second sample piece further comprises a circular truncated cone, the circular truncated cone is arranged at one end, away from the second clamping section, of the second welding section, the circular truncated cone and the second welding section are coaxially arranged, and the circular truncated cone and the second welding section are simultaneously inserted into the mounting groove;
the distance between the outer circumferential surface of the circular truncated cone and the inner circumferential surface of the mounting groove is W, and W is larger than or equal to 1mm and smaller than or equal to 3 mm.
As a preferable technical scheme of the circular axial socketing weld joint breaking torque testing method, the diameter of the circumscribed circle of the second welding section is D1, the inner diameter of the mounting groove is D2, and D1 is D2.
As a preferred technical scheme of the circular axial bell and spigot weld joint failure torque testing method, the outer diameter of the first welding section is D3, and D2+5mm is not less than D3 is not less than D2+10 mm.
As a preferred technical scheme of the test method for the breaking torque of the circular axial sleeving weld joint, an annular step is convexly arranged on the outer peripheral surface of one side of the first clamping section, which is adjacent to the first welding section, the diameter of the step is D4, and D4 is more than or equal to D2 when the diameter of the step is D2-5 mm.
As a preferred technical scheme of the circular axial sleeving weld joint failure torque testing method, the diameter D5 of the circumscribed circle of the first clamping section is larger than or equal to D4-5mm and smaller than or equal to D5 and smaller than or equal to D4.
The invention has the beneficial effects that:
the invention provides a circular axial sleeving welding line damage torque test method, which comprises the following steps: extracting actual welding parameters of an actual transmission structure; establishing a simulation model; respectively manufacturing a first sample piece and a second sample piece based on a simulation model, wherein the first sample piece comprises a cylindrical first welding section and a regular prism-shaped first clamping section, and the second sample piece comprises a cylindrical second welding section and a regular prism-shaped second clamping section; assembling the first sample piece and the second sample piece, welding a welding seam to be welded through an actual welding process and forming a test welding seam, wherein the radius of the test welding seam is equal to the actual radius of the actual welding seam, and the depth of the test welding seam is equal to the actual depth of the actual welding seam, so that the welding parameters of the test welding seam and the actual welding seam are the same; and manufacturing a clamping fixture, wherein the clamping fixture comprises a first clamping piece and a second clamping piece, the first clamping piece can be sleeved on the first clamping section, the second clamping piece can be sleeved on the second clamping section, and the test transmission structure is clamped to the torque testing machine and subjected to destructive torque test. Because the shapes of the first clamping section and the second clamping section are regular prism shapes, the first clamping piece and the second clamping piece are simple in structural design, and cost can be effectively reduced.
Drawings
FIG. 1 is a schematic diagram of a circular axial socket weld failure torque test method in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a first sample in an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a second sample in an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a test transmission structure according to an embodiment of the present invention;
FIG. 5 is an exploded view of a torsion testing machine, a clamping fixture and a testing transmission structure according to an embodiment of the invention;
FIG. 6 is a second exploded schematic view of the torsion testing machine, the clamping fixture and the test transmission structure in the embodiment of the invention.
In the figure:
10. testing the transmission structure;
1. a first sample; 11. a first welding section; 111. mounting grooves; 12. a first clamping section; 13. a step;
2. a second sample; 21. a second welding section; 22. a second clamping section; 23. a circular truncated cone;
3. a first clamping member;
4. a second clamping member;
5. a torque testing machine; 51. a rotating end; 52. a fixed end; 53. a slide rail; 54. an electric motor.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1, the embodiment provides a method for testing a circular axial sleeving weld joint failure torque, and the method for testing the circular axial sleeving weld joint failure torque is specifically used for indirectly testing a maximum bearing torque of an actual weld joint of an actual transmission structure, and is helpful for improving the design accuracy of the actual transmission structure. The actual transmission structure comprises a first workpiece and a second workpiece, the first workpiece is sleeved on the second workpiece, in the related art, the first workpiece and the second workpiece are generally complex in structure and irregular in shape, when an actual welding seam of the actual transmission structure is directly tested, a complex fixture needs to be designed, the cost is increased, and meanwhile, in the actual testing process, the position where damage occurs at first is often in a non-welding area, so that the accurate maximum bearing torque cannot be obtained.
In this embodiment, the actual transmission structure is exemplified by a transmission gear welding assembly. The first workpiece is a combination tooth, the second workpiece is a transmission gear, and the manufacturing materials of the first workpiece and the second workpiece are all 16MnCr5H steel.
The circular axial socketing weld joint breaking torque testing method provided by the embodiment can fully solve the problems, and comprises the following steps of S10-S70.
S10: and extracting actual welding parameters of the actual transmission structure.
The actual welding parameters are the actual radius of the actual weld, the actual depth of the actual weld, and the actual welding process for welding the actual weld.
S20: and establishing a simulation model.
The simulation model comprises a geometric model of the first sample 1 and a geometric model of the second sample 2. Wherein, first appearance piece 1 is including being the first welding section 11 of columniform and being the first clamping section 12 of regular prism shape, and the central line of first welding section 11 coincides with the central line of first clamping section 12. As shown in fig. 2 to 4, the second sample 2 includes a second welding section 21 having a cylindrical shape and a second clamping section 22 having a regular prism shape, and a center line of the second welding section 21 coincides with a center line of the second clamping section 22. The embodiment exemplarily shows that the first clamping section 12 has a regular pentagonal prism shape, and the second clamping section 22 has a regular decagonal prism shape.
The first welding segment 11 is provided with a cylindrical mounting groove 111, and the second welding segment 21 can be inserted into the mounting groove 111.
S30: based on the simulation model, a first sample 1 and a second sample 2 were produced, respectively.
The first sample 1 and the second sample 2 may be machined by a CNC process. Preferably, the material of the first sample 1 is the same as that of the first workpiece, and the material of the second sample 2 is the same as that of the second workpiece. In this example, the first sample 1 and the second sample 2 were both made of 16MnCr5H steel.
S40: the first sample 1 and the second sample 2 are assembled.
The second welding section 21 of the second sample 2 may be inserted into the mounting groove 111 of the first sample 1 through a press-fitting process or the like, and a welding seam to be welded is formed between the outer circumferential surface of the second welding section 21 and the inner wall of the mounting groove 111.
S50: welding a welding seam to be welded through an actual welding process and forming a test welding seam;
and welding the first sample piece 1 and the second sample piece 2 to obtain a test transmission structure 10, wherein the radius of a test welding line is equal to the actual radius, and the depth of the test welding line is equal to the actual depth.
The welding process is one of laser welding and electron beam welding, and can be selected according to the welding process required by the first workpiece and the second workpiece. In this embodiment, the transmission gear welding assembly is electron beam welded, and thus, electron beam welding is also used when welding a weld to be welded.
The radius of the test weld is equal to the actual radius of the actual weld, and the depth of the test weld is equal to the actual depth of the actual weld. In this example, the depth of the test weld was 3.5 mm.
Optionally, the second sample 2 further includes a circular truncated cone 23, the circular truncated cone 23 is disposed at an end of the second welding section 21 away from the second clamping section 22, the circular truncated cone 23 and the second welding section 21 are coaxially disposed, and the circular truncated cone 23 and the second welding section 21 are simultaneously inserted into the mounting groove 111; the distance between the outer circumferential surface of the circular truncated cone 23 and the inner circumferential surface of the mounting groove 111 is W, and W is more than or equal to 1mm and less than or equal to 3 mm. In the present embodiment, the distance between the outer peripheral surface of the circular truncated cone 23 and the inner peripheral surface of the mounting groove 111 is specifically 1 mm.
The diameter of the circumscribed circle of the second welding section 21 is D1, the inner diameter of the installation groove 111 is D2, D1 is D2, the matching form is H7/n6, and the matching form is the same as the requirement and the matching form between the combination teeth and the transmission gears in the transmission gear welding assembly, the outer diameter of the first welding section 11 is D3, D2+5mm is not more than D3 is not more than D2+10mm, the outer peripheral surface of one side of the first clamping section 12 adjacent to the first welding section 11 is convexly provided with an annular step 13, the diameter of the step 13 is D4, the length of the step 13 is L, D2-5mm is not less than D4 is not more than D5, D6959-5 mm is not more than D5 is not more than D4., in the embodiment, D1 is 60mm, D2 is 60mm, D3 is 70mm, D6867 is 60mm, D87458 is not more than D L mm, and the test results of the thin weld joint can be obtained preferentially, and the test results of the thin weld can be guaranteed.
It should be noted that in the present embodiment, the actual transmission structure is subjected to heat treatment after welding, so that the test transmission structure 10 obtained after welding is also subjected to heat treatment according to the heat treatment requirement of the actual transmission structure.
S60: and manufacturing a clamping fixture.
The clamping fixture comprises a first clamping piece 3 and a second clamping piece 4, the first clamping piece 3 can be sleeved on the first clamping section 12 and can limit the first sample piece 1 to rotate along the circumferential direction of the first welding section 11, and the second clamping piece 4 can be sleeved on the second clamping section 22 and can limit the second sample piece 2 to rotate along the circumferential direction of the second welding section 21. The material of the first clamping piece 3 and the second clamping piece 4 is medium carbon steel.
Specifically, the first clamping piece 3 is provided with a regular pentagonal prism-shaped hole which can be sleeved on the first clamping section 12 of the first sample piece 1, the shapes of the two are matched, and the gap amount is controlled to be 0.2-0.5 mm. The second clamping piece 4 is provided with a regular decagonal prism-shaped hole which can be sleeved on the second clamping section 22 of the second sample piece 2, the shapes of the two are matched, and the gap amount is controlled to be 0.2-0.5 mm.
Because the first sample piece 1 and the second sample piece 2 only have actual welding parameters of actual welding seams in the first workpiece and the second workpiece in the embodiment, the shape rules of the first sample piece and the second sample piece can be ensured, the design difficulty of the clamping fixture can be greatly reduced, and the cost is reduced.
S70: clamping the test transmission structure 10 to a torque tester 5 and carrying out a destructive torque test;
as shown in fig. 5 and 6, the torsion testing machine 5 includes a fixed end 52 and a rotatable end 51, and the first clamping member 3 is clamped on the rotatable end 51; clamping the second clamping member 4 to the fixed end 52; sleeving the first clamping piece 3 on the first clamping section 12; sleeving the second clamping piece 4 on the second clamping section 22; rotating the rotating end 51 at a preset angular speed and stopping until the test weld is damaged; and acquiring a torque value output by the rotating end 51 when the test welding seam is damaged as the maximum bearing torque of the actual welding seam of the actual transmission structure.
The rotating end 51 is driven by the motor 54 to rotate, and can rotate clockwise or counterclockwise. The predetermined angular velocity is preferably 1 °/min to 30 °/min. Specifically, in the present embodiment, the rotating end 51 rotates at an angular velocity of 30 °/min.
Optionally, the torsion testing machine 5 further includes a slide rail 53, the slide rail 53 is fixed on the ground, the rotating end 51 can slide along the slide rail 53, and the fixed end 52 is fixed on the slide rail 53. Thereby facilitating clamping of the fixed end 52 in the axial direction by moving the rotating end 51 to clamp the first clamping member 3, the test transmission structure 10 and the second clamping member 4.
Optionally, the rotating end 51 is provided with a first slot, the first clamping member 3 is inserted into the first slot, the outer contour of the first clamping member 3 and the contour of the first slot are both regular prism-shaped, the fixing end 52 is provided with a second slot, the second clamping member 4 is inserted into the second slot, and the outer contour of the second clamping member 4 and the contour of the second slot are both regular prism-shaped. Specifically, the outer contours of the first clamping piece 3 and the second clamping piece 4 are both in a regular quadrangular prism shape, the contour of the first slot and the contour of the second slot are both in a regular quadrangular prism shape, so that the contour of the first clamping piece 3 is matched with that of the first slot, the contour of the second clamping piece 4 is matched with that of the second slot, the shapes of the first clamping piece 3 and the second clamping piece are matched, the rotating end 51 can drive the first clamping piece 3 to rotate simultaneously, and the fixed end 52 can limit the second clamping piece 4 to rotate. In this embodiment, the clearance between the first clamping member 3 and the first slot is controlled to be 0.2mm to 0.5mm, and the clearance between the second clamping member 4 and the second slot is controlled to be 0.2mm to 0.5 mm.
Alternatively, the torque value output by the rotating end 51 when the collected test weld is damaged may be obtained by a torque sensor disposed on an output shaft of the motor 54, and the rotation of the motor 54 may be controlled by a controller connected to the motor 54.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A circular axial sleeving welding line damage torque testing method is characterized by comprising the following steps:
s10: extracting actual welding parameters of an actual transmission structure;
the actual transmission structure comprises a first workpiece and a second workpiece, the first workpiece is sleeved on the second workpiece, a round actual welding seam is formed between the first workpiece and the second workpiece through welding, and the actual welding parameters comprise the actual radius of the actual welding seam, the actual depth of the actual welding seam and the actual welding process for welding the actual welding seam;
s20: establishing a simulation model;
the simulation model comprises a geometric model of a first sample piece (1) and a geometric model of a second sample piece (2), the first sample piece (1) comprises a first cylindrical welding section (11) and a first clamping section (12) in a regular prism shape, the center line of the first welding section (11) is superposed with the center line of the first clamping section (12), the second sample piece (2) comprises a second cylindrical welding section (21) and a second clamping section (22) in a regular prism shape, the center line of the second welding section (21) is superposed with the center line of the second clamping section (22), a cylindrical mounting groove (111) is formed in the first welding section (11), and the second welding section (21) can be inserted into the mounting groove (111);
s30: respectively manufacturing the first sample piece (1) and the second sample piece (2) based on the simulation model;
s40: assembling the first sample (1) and the second sample (2);
inserting the second welding section (21) of the second sample piece (2) into the mounting groove (111) of the first sample piece (1), and forming a welding seam to be welded between the outer peripheral surface of the second welding section (21) and the inner wall of the mounting groove (111);
s50: welding the welding line to be welded through the actual welding process and forming a test welding line;
welding the first sample piece (1) and the second sample piece (2) to obtain a test transmission structure (10), wherein the radius of the test welding line is equal to the actual radius, and the depth of the test welding line is equal to the actual depth;
s60: manufacturing a clamping fixture;
the clamping fixture comprises a first clamping piece (3) and a second clamping piece (4), the first clamping piece (3) can be sleeved on the first clamping section (12) and can limit the first sample piece (1) to rotate along the circumferential direction of the first welding section (11), and the second clamping piece (4) can be sleeved on the second clamping section (22) and can limit the second sample piece (2) to rotate along the circumferential direction of the second welding section (21);
s70: clamping the test transmission structure (10) to a torque tester (5) and carrying out a destructive torque test;
the torsion testing machine (5) comprises a fixed end (52) and a rotating end (51), wherein the fixed end (52) and the rotating end (51) are fixedly arranged, and the first clamping piece (3) is clamped on the rotating end (51); clamping the second clamping member (4) to the fixed end (52); sleeving the first clamping piece (3) on the first clamping section (12); sleeving the second clamping piece (4) on the second clamping section (22); rotating the rotating end (51) at a preset angular speed and stopping until the test weld is damaged; and acquiring a torque value output by the rotating end (51) when the test welding line is damaged as the maximum bearing torque of the actual welding line of the actual transmission structure.
2. The circular axial bell weld failure torque test method according to claim 1, characterized in that the first clamping member (3) and the second clamping member (4) are both made of medium carbon steel.
3. The circular axial sleeving weld failure torque testing method according to claim 1, wherein the rotating end (51) is provided with a first slot, the first clamping member (3) is connected to the first slot in an inserted manner, the outer contour of the first clamping member (3) and the contour of the first slot are both in a regular prism shape, the fixing end (52) is provided with a second slot, the second clamping member (4) is connected to the second slot in an inserted manner, and the outer contour of the second clamping member (4) and the contour of the second slot are both in a regular prism shape.
4. The circular axial bell weld failure torque test method of claim 1, wherein the predetermined angular velocity is between 1 °/min and 30 °/min.
5. The circular axial sleeving weld failure torque testing method according to claim 1, wherein the second sample (2) further comprises a circular truncated cone (23), the circular truncated cone (23) is arranged at one end, away from the second clamping section (22), of the second welding section (21), the circular truncated cone (23) and the second welding section (21) are coaxially arranged, and the circular truncated cone (23) and the second welding section (21) are simultaneously inserted into the mounting groove (111);
the distance between the outer circumferential surface of the circular truncated cone (23) and the inner circumferential surface of the mounting groove (111) is W, and W is larger than or equal to 1mm and smaller than or equal to 3 mm.
6. The circular axial bell weld failure torque test method according to claim 1, wherein the circumscribed circle diameter of the second welding section (21) is D1, and the inner diameter of the installation groove (111) is D2, D1 ═ D2.
7. The circular axial bell weld failure torque test method according to claim 6, characterized in that the first welding section (11) has an outer diameter D3, D2+5mm D3D 2+10 mm.
8. The circular axial bell weld failure torque test method according to claim 7, characterized in that an annular step (13) is convexly arranged on the outer peripheral surface of one side of the first clamping section (12) adjacent to the first welding section (11), the diameter of the step (13) is D4, D2-5mm < D4 < D2.
9. The circular axial bell weld failure torque test method according to claim 8, characterized in that the circumscribed circle diameter D5, D4-5mm ≤ D5 ≤ D4 of the first clamping section (12).
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| CN202010207584.5A CN111398061B (en) | 2020-03-23 | 2020-03-23 | Circular axial sleeving weld joint damage torque testing method |
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| CN202010207584.5A CN111398061B (en) | 2020-03-23 | 2020-03-23 | Circular axial sleeving weld joint damage torque testing method |
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| CN111398061A true CN111398061A (en) | 2020-07-10 |
| CN111398061B CN111398061B (en) | 2022-11-15 |
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