CN209820963U - Four-point bending fatigue test device for dissimilar steel welded joint - Google Patents
Four-point bending fatigue test device for dissimilar steel welded joint Download PDFInfo
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- CN209820963U CN209820963U CN201920085568.6U CN201920085568U CN209820963U CN 209820963 U CN209820963 U CN 209820963U CN 201920085568 U CN201920085568 U CN 201920085568U CN 209820963 U CN209820963 U CN 209820963U
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Abstract
The utility model discloses a xenogenesis steel welded joint four-point bending fatigue test device, including lower strutting arrangement, go up pressure equipment and test piece, lower strutting arrangement includes the base, the top of base is provided with support and bearer bar, the top of support is provided with down the compression leg, the preceding lateral wall of support is provided with first gasket, the bottom and the top of the preceding terminal surface of first gasket all are provided with first bolt, the top circumference outer wall of compression leg is provided with the stop collar down, the top of stop collar is provided with spacing bolt, go up pressure equipment and include the briquetting, the bottom left and right sides symmetry of briquetting is provided with the compression leg, the preceding lateral wall left and right sides symmetry of briquetting is provided with the second gasket, the bottom and the top of the preceding terminal surface of two sets of second gaskets all are provided with the second bolt, the top of briquetting is provided with the. The utility model discloses can be convenient change upper and lower compression leg, improve the precision of test result, nimble spacing according to the actual width of test piece, reduce the possibility that test piece atress side was moved, reduce the risk.
Description
Technical Field
The utility model relates to a welding four-point bending fatigue test technical field, in particular to xenogenesis steel welded joint four-point bending fatigue test device.
Background
After the dissimilar steel is welded, a welded joint is generated, a welded joint area relates to a welding seam, a heat affected zone and a fusion line, the structural organization is complex, and the organization and the performance are non-uniform. The mechanical properties and the fracture behaviors of the welded joint in three areas of a welding line, a heat affected zone and a fusion line are different, and different results are necessarily obtained by the welded joint with different notch positions when a fracture or fatigue test is carried out. In the analysis of fracture prevention or life estimation, the weakest area of the welded joint is usually selected as the analysis object, wherein the four-point bending test is a simple and reliable analysis method. However, the traditional testing device is difficult to adjust according to the actual width of a test piece, and the force bearing point is fast in loss in the testing process and difficult to maintain and replace, so that the four-point bending fatigue testing device for the dissimilar steel welding joint is provided.
SUMMERY OF THE UTILITY MODEL
The utility model provides a four-point bending fatigue test device of xenogenesis steel welded joint, main aim at can be convenient change upper and lower compression leg, improve the precision of test result, according to the nimble spacing of the actual width of test piece, reduce the possibility that test piece atress side was moved, reduce the risk.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a four-point bending fatigue test device for dissimilar steel welded joints comprises a lower support device, an upper pressure device and a test piece, wherein the lower support device comprises a base, supports are symmetrically arranged on the left side and the right side of the top of the base, protective frames are symmetrically arranged on the left side and the right side of the top of the base, two protective frames are arranged between the two protective frames, lower compression legs are arranged on the tops of the two supports, first gaskets are arranged on the front side walls of the two supports, first bolts are arranged on the bottoms and the tops of the front end surfaces of the first gaskets, the supports are fixedly connected with the first gaskets through bottom first bolts, the lower compression legs are fixedly connected with the first gaskets through top first bolts, a limit sleeve is arranged on the outer wall of the circumference of the top of the lower compression legs, the bottoms of the left side and the right side of the limit sleeve are arranged on the top of the support, limit bolts are symmetrically arranged on the left side, and the stop collar is connected through spacing bolt with the support, the pressure equipment is put including the briquetting, the bottom left and right sides symmetry of briquetting is provided with the compression leg, the preceding lateral wall left and right sides symmetry of briquetting is provided with the second gasket, and is two sets of the bottom and the top of the preceding terminal surface of second gasket all are provided with the second bolt, the briquetting passes through top second bolt fixed connection with the second gasket, the second gasket passes through bottom second bolt fixed connection with the compression leg, the top of briquetting is provided with the screw thread post.
Preferably, two sets of the bottom of stop collar all is provided with the sliding block that the cross-section is "protruding" font, and the top of support is seted up and is "protruding" font groove with the cross-section of sliding block looks adaptation, and when the sliding block of "protruding" font matches with the groove at support top, at the stop collar removal in-process, only remain the degree of freedom that the stop collar removed in the groove, restriction other moving direction of stop collar.
Preferably, the top symmetry of two sets of the support evenly is provided with the inserting groove, and inserting groove and limit bolt looks adaptation are convenient for through limit bolt fixed connection support and stop collar.
Preferably, the top of the protective frame is provided with a groove, and the bottom surface of the groove is lower than the top of the lower pressing column, so that when the test piece is stressed to bend downwards, the test result cannot be influenced due to contact interference between the test piece and the protective frame.
Preferably, the distance between the two groups of protection frames is greater than the width of the pressing block, and the pressing block cannot collide with the protection frames in the downward moving process.
Preferably, the bottom of the base is provided with a threaded hole, and the base can be fixed in a threaded column of the test platform through the threaded hole.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model has the advantages that the lower compression leg and the support are both connected with the first gasket through the first bolt, so that the lower compression leg and the support are fixedly connected, the upper compression leg and the pressing block are both connected with the second gasket through the second bolt, so that the upper compression leg and the pressing block are fixedly connected, and the lower compression leg and the upper compression leg which are seriously stressed and damaged in the four-point bending fatigue test can be conveniently replaced;
2. the utility model can limit the test pieces with different widths by arranging the movable limiting sleeve at the top of the lower compression leg and matching the limiting bolt with the inserting groove arranged on the support, thereby reducing the risk of lateral movement of the test pieces in the test process;
3. the utility model discloses a put the test piece in the centre of protective frame recess, through the effect of protective frame, reduce the test piece and appear the possibility that the fracture back departure hurt the people, improve safety protection performance.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a left side view of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of the present invention;
FIG. 4 is a cross-sectional view taken along line B-B of the present invention;
fig. 5 is a partial enlarged view of the present application C.
In the figure: 1-lower supporting means; 101-a base; 102-a support; 103-a protective frame; 104-pressing down the column; 105-a first shim; 106-a first bolt; 107-a stop collar; 108-a limit bolt; 109-a slider; 110-a plug groove; 2-pressing device; 201-briquetting; 202-upper pressing column; 203-a second gasket; 204-a second bolt; 205-threaded post; 3-test piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like 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, and 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 therefore, should not be construed as limiting the present invention.
The four-point bending fatigue test device for the dissimilar steel welded joint shown in fig. 1-5 comprises a lower support device 1, an upper support device 2 and a test piece 3, wherein the lower support device 1 comprises a base 101, a threaded hole is formed in the bottom of the base 101, the base 101 can be fixed in a threaded column of a test platform through the threaded hole, supports 102 are symmetrically arranged on the left side and the right side of the top of the base 101, protective frames 103 are symmetrically arranged on the left side and the right side of the top of the base 101, two groups of protective frames 103 are positioned between the two groups of supports 102, a groove is formed in the top of each protective frame 103, the height of the bottom surface of the groove is lower than that of the upper vertex of each lower pressure column 104, so that when the test piece 3 is stressed to bend downwards, the test result cannot be influenced by contact interference between the test piece 3 and the protective frames 103, the lower pressure columns 104 are arranged on the tops, the bottoms and the tops of the front end surfaces of the two groups of first gaskets 105 are respectively provided with a first bolt 106, the support 102 and the first gasket 105 are fixedly connected through the first bolt 106 at the bottom, the lower pressing column 104 and the first gasket 105 are fixedly connected through the first bolt 106 at the top, the outer wall of the circumference of the top of the lower pressing column 104 is provided with a limit sleeve 107, the bottoms of the left side and the right side of the limit sleeve 107 are positioned at the top of the support 103, the bottoms of the two groups of limit sleeves 107 are respectively provided with a sliding block 109 with a convex cross section, the top of the support 102 is provided with a groove with a convex cross section matched with the sliding block 109, when the sliding block 109 with the convex cross section is matched with the groove at the top of the support 102, in the moving process of the limit sleeve 107, only the degree of freedom of movement of the limit sleeve 107 in the groove is kept, other moving directions of the limit sleeve 107 are limited, and the limit sleeves 107 are connected with the supports 103 through limit bolts 108, the tops of the two groups of supports 102 are symmetrically and uniformly provided with inserting grooves 110, and the inserting groove 110 is matched with the limit bolt 108, so that the support 102 and the limit sleeve 107 can be conveniently and fixedly connected through the limit bolt 108, the pressing device 2 comprises a pressing block 201, wherein, the distance between the two groups of protection frames 103 is larger than the width of the pressing block 201, and during the downward movement of the pressing block 201, the anti-collision protective frame does not collide with the protective frame 103, the upper pressure columns 202 are symmetrically arranged on the left side and the right side of the bottom of the pressing block 201, the second gaskets 203 are symmetrically arranged on the left side and the right side of the front side wall of the pressing block 201, the second bolts 204 are arranged on the bottom and the top of the front end faces of the two sets of second gaskets 203, the pressing block 201 and the second gaskets 203 are fixedly connected through the second bolts 204 on the top, the second gaskets 203 and the upper pressure columns 202 are fixedly connected through the second bolts 204 on the bottom, and the threaded columns 205 are arranged on the top of the.
A specific application of this embodiment is that, when the utility model is used to perform four-point bending fatigue test on a test piece 3 of a dissimilar steel welded joint, firstly, the threaded post 205 at the top of the pressing block 201 is connected with the threaded post at the loading end of the fatigue testing machine, the threaded hole at the bottom of the base 101 is connected with the threaded post at the supporting end of the fatigue testing machine, the relative positions of the lower supporting device 1 and the upper pressing device 2 are adjusted, after the lower supporting device 1 and the upper pressing device 2 are fixed, the test piece 3 is placed at the tops of the two groups of lower pressing posts 104 and passes through the groove of the protection frame 103, the left and right groups of limit sleeves 107 are moved, according to the actual width of the test piece 3, the limit sleeves 107 are moved to the two sides of the test piece 3, and are inserted into the insertion groove 110 of the support 102 by using the limit bolt 108, the limit sleeves 107 are fixed, thereby limiting the test piece 3, the upper press column 202 was brought into contact with the test piece 3, and the test piece 3 was bent downward, thereby completing the four-point bending fatigue test.
When the four-point bending fatigue test is performed, the lower compression leg 104 and the upper compression leg 202 are worn, and in order to ensure the accuracy of the test result, the lower compression leg 104 and the upper compression leg 202 need to be replaced in real time according to the states of the lower compression leg 104 and the upper compression leg 202. When the lower pressing column 104 is replaced, the first bolt 106 is rotated and removed, the lower pressing column 104 can be removed after the first gasket 105 is removed, the lower pressing column 104 and the support 102 can be fixedly connected through the first bolt 106 penetrating through the first gasket 105 after a new lower pressing column 104 is placed at the top of the support 102, and the replacement is completed, wherein the upper pressing column 202 is replaced by the same method.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The utility model provides a xenogenesis steel welded joint four-point bending fatigue test device, includes under bracing device (1), top pressure equipment (2) and testpieces (3), its characterized in that: the lower supporting device (1) comprises a base (101), supports (102) are symmetrically arranged on the left side and the right side of the top of the base (101), protective frames (103) are symmetrically arranged on the left side and the right side of the top of the base (101), two groups of protective frames (103) are located between the two groups of supports (102), lower compression columns (104) are arranged on the tops of the two groups of supports (102), first gaskets (105) are arranged on the front side walls of the two groups of supports (102), first bolts (106) are arranged at the bottoms and the tops of the front end faces of the two groups of first gaskets (105), the supports (102) and the first gaskets (105) are fixedly connected through first bottom bolts (106), the lower compression columns (104) and the first gaskets (105) are fixedly connected through first top bolts (106), and limiting sleeves (107) are arranged on the outer wall of the circumference of the top of the lower compression columns (104), the bottoms of the left side and the right side of the limiting sleeve (107) are positioned at the top of the support (102), the left side and the right side of the top of the limiting sleeve (107) are symmetrically provided with limiting bolts (108), and the limit sleeve (107) is connected with the support (102) through a limit bolt (108), the upper pressing device (2) comprises a pressing block (201), upper pressing columns (202) are symmetrically arranged on the left side and the right side of the bottom of the pressing block (201), second gaskets (203) are symmetrically arranged on the left side and the right side of the front side wall of the pressing block (201), second bolts (204) are arranged at the bottom and the top of the front end surface of each group of the second gaskets (203), the pressing block (201) is fixedly connected with the second gasket (203) through a second bolt (204) at the top part, the second gasket (203) is fixedly connected with the upper pressing column (202) through a second bolt (204) at the bottom, and a threaded column (205) is arranged at the top of the pressing block (201).
2. The dissimilar steel welded joint four-point bending fatigue test device according to claim 1, characterized in that: the bottom of the two groups of limiting sleeves (107) is provided with sliding blocks (109) with the cross sections in the shape of a Chinese character 'tu', and the top of the support (102) is provided with grooves with the cross sections matched with the sliding blocks (109) in the shape of a Chinese character 'tu'.
3. The dissimilar steel welded joint four-point bending fatigue test device according to claim 1, characterized in that: inserting grooves (110) are symmetrically and uniformly arranged at the tops of the two groups of supports (102), and the inserting grooves (110) are matched with the limiting bolts (108).
4. The dissimilar steel welded joint four-point bending fatigue test device according to claim 1, characterized in that: the top of the protection frame (103) is provided with a groove, and the bottom surface of the groove is lower than the upper vertex of the lower compression column (104).
5. The dissimilar steel welded joint four-point bending fatigue test device according to claim 1, characterized in that: the distance between the two groups of protective frames (103) is larger than the width of the pressing block (201).
6. The dissimilar steel welded joint four-point bending fatigue test device according to claim 1, characterized in that: the bottom of the base (101) is provided with a threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920085568.6U CN209820963U (en) | 2019-01-18 | 2019-01-18 | Four-point bending fatigue test device for dissimilar steel welded joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920085568.6U CN209820963U (en) | 2019-01-18 | 2019-01-18 | Four-point bending fatigue test device for dissimilar steel welded joint |
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| Publication Number | Publication Date |
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| CN209820963U true CN209820963U (en) | 2019-12-20 |
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| CN201920085568.6U Active CN209820963U (en) | 2019-01-18 | 2019-01-18 | Four-point bending fatigue test device for dissimilar steel welded joint |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218779A (en) * | 2021-04-02 | 2021-08-06 | 张家港市海宇金属材料测试有限公司 | Bending test method for dissimilar steel welding |
| CN113340712A (en) * | 2021-06-18 | 2021-09-03 | 中国飞机强度研究所 | Four-point loading structure |
-
2019
- 2019-01-18 CN CN201920085568.6U patent/CN209820963U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218779A (en) * | 2021-04-02 | 2021-08-06 | 张家港市海宇金属材料测试有限公司 | Bending test method for dissimilar steel welding |
| CN113218779B (en) * | 2021-04-02 | 2023-03-03 | 张家港市海宇金属材料测试有限公司 | Bending test method for dissimilar steel welding |
| CN113340712A (en) * | 2021-06-18 | 2021-09-03 | 中国飞机强度研究所 | Four-point loading structure |
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