Special fixed mold for frame weld strength test

Abstract

The present invention relates to a special fixed mold for testing the strength of a frame weld, which is used to fix a sample. The fixed mold includes a base, a positioning base, a vertical fixing component, a horizontal fixing component and a force sensor. The positioning base is fixedly installed on the base. The sample includes a middle tube, a first five-way tube and a second five-way tube. The two ends of the middle tube are respectively welded with a first five-way tube and a second five-way tube. The first five-way tube is sleeved on the positioning base and fixed by a vertical fixing component. The second five-way tube is fixed by a horizontal fixing component, and the force sensor is fixedly connected to the horizontal fixing component. The present invention solves the defect of incomplete welding skill evaluation, ensures the welding lap strength of the frame and the front fork, ensures the reliability of welder evaluation, and improves the timeliness and qualification rate of new product development.

Description

Technical Field

[0001] The invention relates to a fixed mold, in particular to a special fixed mold for testing the strength of a vehicle frame weld. Background Art

[0002] At present, the company's assessment of welder skills only stays on the external pipe surface. The quality assurance department visually compares the welder's welding samples with the standard products based on the quality standards of the company's "QC Engineering Drawing". This assessment method is highly subjective and cannot accurately assess the welder's welding skills. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a special fixed mold for frame weld strength testing. The mold utilizes a positioning base, a vertical fixing assembly and a horizontal fixing assembly to fix the sample. The cylinder of the fatigue testing equipment acts on the sample through a force sensor to obtain the test result, which is used as the basis for the assessment of new welders' regularization and process changes, and is more scientific and reliable.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A special fixed mold for testing the strength of a vehicle frame weld, used for fixing a sample, the fixed mold comprising a base, a positioning base, a vertical fixing assembly, a horizontal fixing assembly and a force sensor, the positioning base being fixedly mounted on the base, the sample comprising a middle tube, a first five-way tube and a second five-way tube, the first five-way tube and the second five-way tube being welded to both ends of the middle tube respectively, the first five-way tube being sleeved on the positioning base and fixed by the vertical fixing assembly, the second five-way tube being fixed by the horizontal fixing assembly, and the force sensor being fixedly connected to the horizontal fixing assembly.

[0006] Preferably, the middle tube is arranged vertically to the first and second bottom bracket tubes, and the first bottom bracket tube and the second bottom bracket tube are also arranged vertically.

[0007] Preferably, the base comprises a bottom plate and a support block, the support block is fixed on the bottom plate, and the positioning base is fixed on the support block.

[0008] Preferably, the positioning base is in a cylindrical structure, the lower end of the positioning base extends radially outward to form a circle of connecting plates, and the upper end of the positioning base extends axially upward to form a positioning column.

[0009] Preferably, the positioning column is a hollow cylindrical structure, and the outer diameter of the positioning column is smaller than the outer diameter of the positioning base. The interior of the positioning column is provided with an internal thread, and the connecting plate is fixedly mounted on the base.

[0010] Preferably, the vertical fixing assembly includes a first screw rod and a first nut, the first five-way tube is sleeved on the positioning column, the lower end of the first screw rod is screwed into the positioning column, and the upper end thereof passes through the first five-way tube, and the first nut is screwed to the upper end of the first screw rod to fix the first five-way tube.

[0011] Preferably, the horizontal fastener assembly includes a second screw rod, a second nut, a rod end joint bearing and a third nut. The second screw rod is horizontally inserted into the second five-way tube. A rod end joint bearing is respectively installed at both ends of the second screw rod, and the second nut is screwed on the second screw rod outside the rod end joint bearing. The two second nuts clamp the rod end joint bearing, and the rod end joint bearing can rotate around the second screw rod.

[0012] Preferably, a connecting block is also provided, which is provided with a first mounting hole and two second mounting holes, the first mounting hole is located between the two second mounting holes, the two second mounting holes are respectively passed through a rod end joint bearing and locked by a third nut, and the force sensor is installed in the first mounting hole of the connecting block by screws.

[0013] The beneficial effects of the present invention are:

[0014] 1) The present invention includes a base, a positioning base, a vertical fixing component, a horizontal fixing component and a force sensor. The positioning base is fixedly installed on the base, the first five-way pipe is sleeved on the positioning base and fixed by the vertical fixing component, the second five-way pipe is fixed by the horizontal fixing component, and the force sensor is fixedly connected to the horizontal fixing component. During the test, the cylinder of the fatigue test equipment acts on the sample through the force sensor, and the sample welded by the welder is fatigue tested according to the test requirements (force & number of times). The equipment automatically records the data (force & displacement & number of times), and the skill level of different welders is evaluated according to the number of tests before fracture, which is used as the basis for the assessment of the regularization of new welders and process changes, which is more scientific and reliable; when the sample moves up and down under the action of the cylinder, the rotation of the rod end joint bearing can ensure that the cylinder is always perpendicular to the test sample, thereby ensuring the reliability of the test results;

[0015] 2) This invention is a self-designed product of our company and has been successfully introduced into work. It has the characteristics of simple structure, convenient operation and high reliability of test results. It can 100% simulate the weld overlap method of the frame and the front fork. It uses the same equipment and the same mold to test samples welded by different welders, and can 100% verify and evaluate the welding skills of welders. The present invention solves the defect of incomplete welding skill evaluation, ensures the welding overlap strength of the frame and the front fork, and improves the timeliness and qualification rate of new product development. After using this product, the welding level of the qualified welders screened out has been significantly improved, and the number of customer complaints about frame and front fork breakage in the marketing department has been reduced to 0, and the timeliness and qualification rate of new product development have been improved. The products produced are safer and have higher customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the positioning base in the present invention;

[0018] Figure 3 It is a schematic diagram of the structure of the first, second and third nuts in the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the rod end joint bearing in the present invention;

[0020] Figure 5 It is a structural schematic diagram of the connection block in the present invention;

[0021] Figure 6 It is a schematic diagram of the structure of the sample in the present invention;

[0022] In the figure: 10-base, 11-bottom plate, 12-support block, 20-positioning base, 21-connecting plate, 22-positioning column, 30-vertical fixing assembly, 31-first screw, 32-first nut, 40-horizontal fixing assembly, 41-second screw, 42-second nut, 43-rod end joint bearing, 44-third nut, 50-force sensor, 51-connecting block, 52-first mounting hole, 53-second mounting hole, 54-screw, 60-sample, 61-middle tube, 62-first five-way tube, 63-second five-way tube. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0026] Example: Figure 1-6 As shown, a special fixed mold for testing the strength of a vehicle frame weld is used to fix a sample 60, the fixed mold includes a base 10, a positioning base 20, a vertical fixing assembly 30, a horizontal fixing assembly 40 and a force sensor 50, the positioning base 20 is fixedly installed on the base 10, the sample 60 includes a middle tube 61, a first five-way tube 62 and a second five-way tube 63, the two ends of the middle tube 61 are respectively welded to the first five-way tube 62 and the second five-way tube 63, the first five-way tube 62 is sleeved on the positioning base 20 and fixed by the vertical fixing assembly 30, the second five-way tube 63 is fixed by the horizontal fixing assembly 40, and the force sensor 50 is fixedly connected to the horizontal fixing assembly 30.

[0027] The welder welds the first five-way pipe 62 and the second five-way pipe 63 to the two ends of the middle pipe 61 respectively. The first five-way pipe 62 and the second five-way pipe 63 are interchangeable. The first and second titles are used to describe more clearly. During the test, the base 10 is fixedly installed on the work platform. Two wire grooves are provided on the work platform. The base 10 is aligned with the two wire grooves on the work platform through four holes, and then locked with T-type screws to ensure that the center line of the sample is concentric with the force sensor; after fixing the base 10, the positioning base 20 is fixed to the base 10 by four bolts, and then the first five-way pipe 62 is sleeved on the positioning base 20 The sample is fixed by a vertical fixing component, and the second five-way pipe 63 at the other end is fixed by a horizontal fixing component 40, and the force sensor 50 is fixed on the horizontal fixing component 40. The cylinder of the fatigue testing equipment acts on the sample through the force sensor, and fatigue testing is performed on the sample welded by the welder according to the test requirements (force & number of times). The equipment automatically records data (force & displacement & number of times), and evaluates the skill levels of different welders according to the number of tests before fracture, which is used as a basis for the assessment of new welders' regularization and process changes, and is more scientific and reliable. The present invention has a simple structure, convenient operation and high reliability of test results.

[0028] like Figure 6 As shown, the middle tube 61 is arranged vertically with the first and second five-way tubes, and the first five-way tube 62 and the second five-way tube 63 are also arranged vertically. In the actual operation process, a certain number of five-way tubes and middle tubes are first processed according to the drawing, and the surface of the pipes is degreased. Then, the two five-way tubes and the middle tube are welded together, and different welding samples are numbered and corresponded to the welders one by one, so as to evaluate the welding skills of the welders according to the sample test results; this sample simulates the mode design of frame or front fork welding, and the middle tube and the five-way tube can be simply processed using existing tailings. The two five-way tubes only need to bore the inner side with a diameter of φ34MM, and the middle tube only needs to punch a diameter of φ41MM at both ends. The operation is simple and the cost is low.

[0029] like Figure 1 and Figure 2 As shown, the base 10 includes a bottom plate 11 and a support block 12, the support block 12 is fixed on the bottom plate 11, and the positioning base 20 is fixed on the support block 12. The positioning base 20 is a cylindrical structure, the lower end of the positioning base 20 extends radially outward to form a circle of connecting plates 21, and the upper end of the positioning base 20 extends axially upward to form a positioning column 22.

[0030] like Figure 2As shown, the positioning column 22 is a hollow cylindrical structure, and the outer diameter of the positioning column 22 is smaller than the outer diameter of the positioning base 20. The interior of the positioning column 22 is provided with an internal thread, and the connecting plate 21 is fixedly mounted on the base 10. The connecting plate 21 is disc-shaped, and the positioning column 22, the positioning base 20 and the connecting plate 21 are coaxially arranged. The connecting plate 21 is locked on the support block 12 by four evenly arranged screws. In this embodiment, the outer diameter of the positioning column is φ33.86MM, and the diameter of the first or second five-way pipe is φ34MM, so the five-way pipe can be tightly fitted on the positioning column, and the five-way pipe is further fixed by the vertical fixing assembly 30, which can ensure that the five-way pipe is perpendicular to the positioning base 20.

[0031] The vertical fixing assembly 30 includes a first screw rod 31 and a first nut 32. The first five-way tube 62 is sleeved on the positioning column 22. The lower end of the first screw rod 31 is screwed into the positioning column 22, and the upper end thereof passes through the first five-way tube 62. The first nut 32 is screwed onto the upper end of the first screw rod to fix the first five-way tube 62. The lower end of the first screw rod 31 is screwed onto the internal thread of the positioning column, the first five-way tube 62 is sleeved on the first screw rod 31, and the lower end of the first five-way tube is just tightly sleeved on the positioning column 22, and the upper end is further locked to the first five-way tube through the first nut 32.

[0032] The horizontal fastener assembly 40 includes a second screw rod 41, a second nut 42, a rod end joint bearing 43 and a third nut 44. The second screw rod 41 is horizontally inserted into the second five-way pipe 63. A rod end joint bearing 43 is installed at each end of the second screw rod 41, and the second nut 42 is screwed on the second screw rod 41 outside the rod end joint bearing. The two second nuts 42 clamp the rod end joint bearing 43, and the rod end joint bearing 43 can rotate around the second screw rod 41.

[0033] like Figure 5As shown, the fixed mold is also provided with a connecting block 51, and a first mounting hole 52 and two second mounting holes 53 are provided on the connecting block 51. The first mounting hole 52 is located between the two second mounting holes 53. The two second mounting holes 53 are respectively penetrated through a rod end joint bearing 43 and locked by a third nut 44. The force sensor 50 is installed in the first mounting hole 52 of the connecting block 51 by a screw 54. The inner wall of the first mounting hole 52 is an M8 threaded hole, and the second mounting hole is a φ12MM hole. The rod end joint bearing 43 has a section of thread, and the second mounting hole cooperates with the section of thread. The two rod end joint bearings 43 are located on the outside of the second five-way tube 63, and the two second nuts 42 are located on the outside of the rod end joint bearings 43. The horizontal position of the rod end joint bearings 43 and the second five-way tube 63 is limited by the two second nuts 42, so that the rod end joint bearings 43 are always perpendicular to the second five-way tube 63. The rod end joint bearings 43 are rotated around the second screw. When the rod rotates, it also rotates relative to the second five-way tube 63. The connecting block 51 is fixedly mounted on the rod end joint bearing 43 by two third nuts 44. The connecting block 51 is arranged in parallel above the second five-way tube. The force sensor 50 is fixed above the connecting block 51. Therefore, the force sensor 50, the connecting block 51 and the rod end joint bearing 43 are fixedly connected. When the sample 60 moves up and down under the action of the cylinder during the test, the rotation of the rod end joint bearing can ensure that the cylinder is always perpendicular to the test sample, thereby ensuring the reliability of the test results.

[0034] The operation process of the present invention: the steps are as follows:

[0035] Step 1: The base 10 is fixedly installed on the working platform, and the positioning base 20 is fixed to the base 10 by four bolts;

[0036] Step 2: Screw the lower end of the first screw rod 31 into the positioning column 22, and then sleeve the first five-way tube 62 on the first screw rod 31, and the lower end of the first five-way tube is just tightly sleeved on the positioning column 22, and the first nut 32 is locked to the upper end of the first screw rod 31 to fix the first five-way tube 62;

[0037] Step 3: The second screw rod 41 is horizontally inserted into the second bottom bracket tube 63, and a rod end joint bearing 43 is respectively installed at both ends of the second screw rod 41, and a second nut 42 is screwed onto the second screw rod 41 outside the rod end joint bearing, and the two second nuts 42 clamp the rod end joint bearing 43 and the second bottom bracket tube 63;

[0038] Step 4: Screw the two ends of the connection block 51 to the threaded sections of the two rod end joint bearings respectively, and lock and fix the connection block 51 through the third nut 44, and then fix the force sensor 50 to the connection block 51 with screws 54;

[0039] Step 5: Finally, the cylinder of the fatigue test equipment acts on the sample 60 through the force sensor, and the sample welded by the welder is fatigue tested according to the test requirements (force & number of times). The equipment automatically records the data (force & displacement & number of times), and evaluates the skill level of different welders according to the number of tests before fracture, which is used as the basis for the assessment of new welders' regularization and process changes.

[0040] It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A special fixed mold for testing the strength of a vehicle frame weld, used to fix a sample (60), characterized in that: The fixed mold comprises a base (10), a positioning base (20), a vertical fixing assembly (30), a horizontal fixing assembly (40) and a force sensor (50); the positioning base (20) is fixedly mounted on the base (10); the sample (60) comprises a middle tube (61), a first five-way tube (62) and a second five-way tube (63); the first five-way tube (62) and the second five-way tube (63) are respectively welded to two ends of the middle tube (61); the first five-way tube (62) is sleeved on the positioning base (20) and fixed by the vertical fixing assembly (30); the second five-way tube (63) is fixed by the horizontal fixing assembly (40); and the force sensor (50) is fixedly connected to the horizontal fixing assembly (40); The middle tube (61) is arranged vertically with the first five-way tube and the second five-way tube, and the first five-way tube (62) and the second five-way tube (63) are also arranged vertically; The horizontal fixing assembly (40) comprises a second screw rod (41), a second nut (42), a rod end joint bearing (43) and a third nut (44); the second screw rod (41) is horizontally inserted into the second five-way pipe (63); a rod end joint bearing (43) is respectively installed at both ends of the second screw rod (41); and a second nut (42) is screwed onto the second screw rod (41) on the outside of the rod end joint bearing; the two second nuts (42) clamp the rod end joint bearing (43); and the rod end joint bearing (43) can rotate around the second screw rod (41).

2. The special fixed mold for testing the strength of a vehicle frame weld according to claim 1, characterized in that: The base (10) comprises a bottom plate (11) and a support block (12); the support block (12) is fixed on the bottom plate (11); and the positioning base (20) is fixed on the support block (12).

3. The special fixed mold for testing the strength of vehicle frame welds according to claim 1, characterized in that: The positioning base (20) is a cylindrical structure. The lower end of the positioning base (20) extends radially outward to form a circle of connecting plates (21), and the upper end of the positioning base (20) extends axially upward to form a positioning column (22).

4. The special fixed mold for testing the strength of a vehicle frame weld according to claim 3, characterized in that: The positioning column (22) is a hollow cylindrical structure, and the outer diameter of the positioning column (22) is smaller than the outer diameter of the positioning base (20). The interior of the positioning column (22) is provided with an internal thread, and the connecting plate (21) is fixedly mounted on the base (10).

5. The special fixed mold for testing the strength of a vehicle frame weld according to claim 4, characterized in that: The vertical fixing assembly (30) comprises a first screw rod (31) and a first nut (32); the first five-way tube (62) is sleeved on the positioning column (22); the lower end of the first screw rod (31) is screwed into the positioning column (22); the upper end of the first screw rod (31) passes through the first five-way tube (62); the first nut (32) is screwed to the upper end of the first screw rod to fix the first five-way tube (62).

6. The special fixed mold for testing the strength of a vehicle frame weld according to claim 1, characterized in that: A connecting block (51) is also provided, wherein the connecting block (51) is provided with a first mounting hole (52) and two second mounting holes (53), wherein the first mounting hole (52) is located between the two second mounting holes (53), and the two second mounting holes (53) are respectively penetrated through a rod end joint bearing (43) and locked by a third nut (44), and the force sensor (50) is installed in the first mounting hole (52) of the connecting block (51) by means of a screw (54).

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