Testing device applied to shear strength detection of wear-resistant alloy block

Abstract

The utility model relates to a testing device for detecting the shear strength of a wear-resistant alloy block in the field of shear strength testing, which comprises a wear-resistant alloy detection device, press equipment, a sliding fixing device, a connecting rod clamping device and a wear-resistant alloy block, the wear-resistant alloy detection device comprises a fixed bottom plate, a slotting bottom plate, a profiling supporting plate, an upper pressing plate and a force application pressing block, the slotting bottom plate is fixedly installed over the fixed bottom plate, the profiling supporting plate is fixedly installed at the top of the slotting bottom plate, a fan-shaped groove is formed in the right end of the profiling supporting plate, a wear-resistant alloy block is fixedly installed in the fan-shaped groove, and the wear-resistant alloy block is fixedly installed in the upper pressing plate. An upper pressing plate is fixedly mounted at the top of the profiling supporting plate, an arc-shaped groove is formed in the upper pressing plate, and a force application pressing block is movably mounted in the arc-shaped groove, so that the anti-shearing strength of a fusion interface of the wear-resistant alloy block and the influence of fusion part defects on the wear-resistant alloy block are visually expressed; the stability is improved; the detection is convenient.

Description

Technical Field

[0001] The present invention relates to the field of anti-shear strength testing, and particularly to a testing device for detecting the anti-shear strength of wear-resistant alloy blocks. Background Art

[0002] Wear-resistant alloy blocks are wear-resistant materials applied to the screw conveyor of a shield machine. During the transportation of soil, slag, and stones in the shield soil bin, they will rub against each other and cause wear. In order to improve the wear resistance and welding performance of the alloy blocks, the bottom of the wear-resistant alloy block uses Q355B material that is easy to weld, the upper part uses high-chromium alloy material to enhance wear resistance, and the middle is connected by bolts and studs. The upper and lower dissimilar materials are connected by a casting process. Due to the shrinkage difference problem of different materials, there may be some defects in the strength at the connection surface. Existing anti-shear strength tests are all sampling tests. Due to the uncertainty of the positions where defects may exist, it is impossible to complete the strength test of the wear-resistant alloy block using existing test methods.

[0003] Based on this, the present invention designs a testing device for detecting the shear strength of wear-resistant alloy blocks to solve the above problems. Utility Model Content

[0004] The purpose of the present invention is to provide a testing device for detecting the shear strength of wear-resistant alloy blocks, so as to solve the problem that due to the shrinkage difference problem of different materials, there may be some defects in the strength at the connection surface in the above background art. Existing anti-shear strength tests are all sampling tests. Due to the uncertainty of the positions where defects may exist, it is impossible to complete the strength test of the wear-resistant alloy block using existing test methods.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A testing device for detecting the shear strength of wear-resistant alloy blocks, including a wear-resistant alloy detection device, a press device, a sliding fixing device, a connecting rod clamping device, and a wear-resistant alloy block. The wear-resistant alloy detection device includes a fixed bottom plate, a grooved bottom plate, a profiling support plate, an upper pressure plate, and a force-applying pressure block. A grooved bottom plate is fixedly installed directly above the fixed bottom plate. A profiling support plate is fixedly installed on the top of the grooved bottom plate. A fan-shaped groove is opened at the right end of the profiling support plate. A wear-resistant alloy block is fixedly installed in the fan-shaped groove. An upper pressure plate is fixedly installed on the top of the profiling support plate. An arc-shaped groove is opened in the upper pressure plate. A force-applying pressure block is movably installed in the arc-shaped groove. The grooved bottom plate, the profiling support plate, and the upper pressure plate are fixed to the fixed bottom plate by six groups of upper pressure plate fixing screws. The wear-resistant alloy detection device is provided with a press device at the bottom.

[0006] Preferably, the press equipment includes a bottom support platform, side support columns, a moving crossbeam, a pressing center support seat, and clamping support plates. Side support columns are fixedly installed on both the left and right sides of the bottom support platform. A moving crossbeam is movably installed between the two groups of side support columns. A pressing center support seat is fixedly installed at the bottom of the moving crossbeam. Two groups of clamping support plates are fixedly installed on the outer wall of the bottom support platform. A T-shaped groove is formed at the top of the bottom support platform, and a sliding fixing device is movably installed in the T-shaped groove.

[0007] Preferably, the sliding fixing device includes a balance pressure plate, balance support blocks, T-shaped bolts, balance bolts, washers, and bolt nuts. A rectangular groove is formed at the top of the balance pressure plate, and a threaded hole is formed on the right side of the rectangular groove. The bottom of the T-shaped bolt is movably installed in the T-shaped groove, and the T-shaped bolt is in sliding fit with the T-shaped groove. The T-shaped bolt is detachable. The T-shaped bolt is movably installed in the rectangular groove. A washer is movably installed at the top of the rectangular groove, and a bolt nut is movably installed at the top of the washer. The bolt nut is in threaded fit with the T-shaped bolt. A balance support block is movably installed at the bottom of the threaded hole of the balance pressure plate, and the balance support block is installed at the bottom of the balance pressure plate through a balance bolt. The balance support block is detachable.

[0008] Preferably, the connecting rod clamping device includes a clamping pressure plate, a clamping support seat, a main connecting rod, a sub-connecting rod, a driven connecting rod, a connecting rod connecting plate, a screw rod, a connecting rod shaft, a gearbox, a limit screw, a gear, and a handle. The clamping support seat is fixedly installed on the clamping support plate. A clamping pressure plate is installed at the top of the clamping support seat. A gearbox is fixedly installed at the rear end of the clamping support seat. A threaded hole is formed on the outer wall of the gearbox, and a limit screw is fixedly installed in the threaded hole. A gear is movably installed in the right end chamber of the gearbox. A handle is fixedly installed on the outer wall of the gear, and the handle is rotatable relative to the gearbox. A through hole is formed at the top of the gearbox, and a screw rod is movably installed in the hole. The screw rod is meshed with the gear. A connecting rod connecting plate is fixedly installed at the top of the screw rod. Sub-connecting rods are movably installed on both sides of the rear end of the connecting rod connecting plate, and the ends of the sub-connecting rods are movably connected to the ends of the clamping pressure plate. Main connecting rods are movably installed on both sides of the top of the clamping support seat, and the ends of the main connecting rods are movably connected to the middle of the clamping pressure plate. Driven connecting rods are movably installed on both sides of the front end of the connecting rod connecting plate, and the ends of the driven connecting rods are movably connected to the main connecting rods.

[0009] Preferably, the wear-resistant alloy block includes wear-resistant alloy, bolts, stud bolts, and casting blocks. Four threaded holes are formed on the outer wall of the wear-resistant alloy. Bolts are fixedly installed in the left and right two threaded holes, and stud bolts are fixedly installed in the upper and lower two threaded holes. Casting blocks are installed at one ends of the bolts and stud bolts.

[0010] Preferably, the upper part of the wear-resistant alloy block is made of a high-chromium alloy material to enhance wear resistance, and the casting block is made by a casting process using Q355B material which is easy to weld.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention can intuitively express the shear strength of the fusion interface of the wear-resistant alloy block, characterize the influence of the defects in the fusion part on the wear-resistant alloy block, and the fixing device adopts two measures to prevent loosening during the use of equipment detection. The secondary clamping of the connecting rod clamping device reduces the movement of the wear-resistant alloy detection device during shear detection, increases its stability and facilitates detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;

[0014] Figure 2 It is a schematic structural diagram of the test device of the present invention;

[0015] Figure 3 It is a schematic sectional structural diagram of the test device of the present invention;

[0016] Figure 4 It is a schematic structural diagram of the wear-resistant alloy block of the present invention;

[0017] Figure 5 It is a schematic diagram of a partial cross-section of the wear-resistant alloy of the present invention;

[0018] Figure 6 It is a schematic structural diagram of Embodiment 2 of the present invention;

[0019] Figure 7 It is a schematic structural diagram of the connecting rod clamping device of the present invention;

[0020] Figure 8 It is a schematic structural diagram of the transmission mechanism of the present invention.

[0021] In the drawings, the list of components represented by each reference numeral is as follows:

[0022] 1 - Fixed bottom plate, 2 - Grooved bottom plate, 3 - Profiled support plate, 4 - Upper pressure plate, 5 - Force - applying pressure block, 6 - Upper pressure plate fixing screw, 7 - Bottom support platform, 8 - Side support column, 9 - Moving crossbeam, 10 - Pressure - applying center support seat, 11 - Balancing pressure plate, 12 - Balancing support block, 13 - T - shaped bolt, 14 - Balancing bolt, 15 - Gasket, 16 - Bolt and nut, 17 - Clamping pressure plate, 18 - Clamping support seat, 19 - Main connecting rod, 20 - Sub - connecting rod, 21 - Driven connecting rod, 22 - Connecting rod joint plate, 23 - Screw rod, 24 - Connecting rod shaft, 25 - Gearbox, 26 - Gear, 27 - Handle, 28 - Clamping support plate, 29 - T - shaped groove, 30 - Limit screw, 31 - Wear - resistant alloy, 32 - Bolt, 33 - Stud, 34 - Casting block, 101 - Wear - resistant alloy detection device, 201 - Press equipment, 301 - Sliding fixing device, 401 - Connecting rod clamping device, 501 - Wear - resistant alloy block. Detailed implementation mode

[0023] The following will combine with the attached drawings in the embodiments of the present invention Figure 1-8 to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0024] Embodiment 1

[0025] As shown in the attached drawings Figure 2 A test device for detecting the shear strength of a wear - resistant alloy block according to the present invention includes a wear - resistant alloy detection device 101, a press equipment 201, a sliding fixing device 301, a connecting rod clamping device 401 and a wear - resistant alloy block 501. The wear - resistant alloy detection device 101 includes a fixed bottom plate 1, a grooved bottom plate 2, a profiled support plate 3, an upper pressure plate 4 and a force - applying pressure block 5. A grooved bottom plate 2 is fixedly installed directly above the fixed bottom plate 1. A profiled support plate 3 is fixedly installed on the top of the grooved bottom plate 2. A fan - shaped groove is opened at the right end of the profiled support plate. A wear - resistant alloy block 501 is fixedly installed in the fan - shaped groove. An upper pressure plate 4 is fixedly installed on the top of the profiled support plate 3. An arc - shaped groove is opened in the upper pressure plate 4, and a force - applying pressure block 5 is movably installed in the arc - shaped groove. The grooved bottom plate 2, the profiled support plate 3 and the upper pressure plate 4 are fixed on the fixed bottom plate 1 by six groups of upper pressure plate fixing screws. The wear - resistant alloy detection device 101 is provided with a press equipment 201 at the bottom;

[0026] As shown in the attached drawings Figure 1As shown, the press equipment 201 includes a bottom support platform 7, side support columns 8, a moving crossbeam 9, a pressing center support seat 10, and a clamping support plate 28. Side support columns 8 are fixedly installed on both the left and right sides of the bottom support platform 7. A moving crossbeam 9 is movably installed between the two groups of side support columns 8. A pressing center support seat 10 is fixedly installed at the bottom of the moving crossbeam 9. Two groups of clamping support plates 28 are fixedly installed on the outer wall of the bottom support platform 7. A T-shaped groove 29 is formed at the top of the bottom support platform 7, and a sliding fixing device 301 is movably installed in the T-shaped groove 29;

[0027] As shown in the appendix Figure 3 As shown, the sliding fixing device 301 includes a balance pressure plate 11, a balance support block 12, a T-shaped bolt 13, a balance bolt 14, a gasket 15, and a bolt nut 16. A rectangular groove is formed at the top of the balance pressure plate 11, and a threaded hole is formed on the right side of the rectangular groove. The bottom of the T-shaped bolt 13 is movably installed in the T-shaped groove 29. The T-shaped bolt 13 is in sliding fit with the T-shaped groove 29. The T-shaped bolt 13 is detachable. The T-shaped bolt 13 is movably installed in the rectangular groove. A gasket 15 is movably installed at the top of the rectangular groove. A bolt nut 16 is movably installed at the top of the gasket 15. The bolt nut 16 is in threaded fit with the T-shaped bolt 13. A balance support block 12 is movably installed at the bottom of the threaded hole of the balance pressure plate 11. The balance support block 12 is installed at the bottom of the balance pressure plate 12 through a balance bolt 14. The balance support block 12 is detachable;

[0028] As shown in the appendix Figure 4 and the appendix Figure 5 As shown, the wear-resistant alloy block 501 includes a wear-resistant alloy 31, bolts 32, studs 33, and a casting block 34. Four threaded holes are formed on the outer wall of the wear-resistant alloy 31. Bolts 32 are fixedly installed in the left and right threaded holes. Studs 33 are fixedly installed in the upper and lower threaded holes. Casting blocks 34 are arranged at one ends of the bolts 32 and the studs 33;

[0029] The upper half of the wear-resistant alloy block 501 is made of a material with high chromium alloy to enhance wear resistance. The casting block 34 is manufactured by a casting process using Q355B material which is easy to weld.

[0030] The principle of Example 1 is as follows: Place the fixed wall panel 1 on the top platform of the bottom support platform 7. The balance pressing plate 11 presses against the fixed bottom plate 1 and the balance support block 12. The balance support block 12 is fixed by the balance bolt 14. The T-shaped bolt passes through the T-shaped groove of the bottom support platform. The gasket 15 and the bolt nut 16 fix the entire fixed bottom plate by tightening the T-shaped bolt. It is symmetrically fixed on both the left and right sides. From the bottom to the top, install the wear-resistant alloy block 501 and the high-chromium alloy part according to the fixed bottom plate 1, the grooved bottom plate 2, and the profiling support plate 3. The part made of Q355B material is suspended. The upper pressing plate is fixed by 7 upper pressing plate fixing socket head cap screws 6. The force-applying pressing block 5 is installed through the middle notch of the upper pressing plate 4. After the installation is completed, start the press equipment 201 to apply pressure. The force is transmitted through the pressure application center support seat 10 to act on the force-applying pressing block 5. According to the test, obtain the maximum bearing pressure value. Through the shear strength calculation formula τ = F / (A × L), obtain the shear strength of the wear-resistant alloy block, and specifically numerically characterize the shear strength of the fusion interface;

[0031] The shear strength is usually represented by τ (tau), and its calculation formula is:

[0032] τ = F / (A × L)

[0033] Among them, F represents the shear force, A represents the shear area, and L represents the shear length.

[0034] The specific calculation steps are as follows:

[0035] 1. Measure the shear force: Determine the maximum bearing force of the material during the shear process through experiments. This force is the shear force F.

[0036] 2. Calculate the shear area: Calculate the shear area A according to the geometric shape and dimensions of the shear surface. For a rectangular shear surface, A = b × h, where b is the width of the shear surface and h is the height.

[0037] 3. Determine the shear length: The shear length L is the dimension of the shear surface in the direction of the shear force, usually equal to the width b of the shear surface.

[0038] 4. Substitute into the formula for calculation: Substitute the measured shear force F, shear area A, and shear length L into the above formula to calculate the shear strength τ.

[0039] Example 2

[0040] Example 2 is an improvement based on the technical solution of Example 1. As shown in the attached Figure 6 attachment Figure 7 attachment Figure 8As shown, the connecting rod clamping device 401 includes a clamping pressing plate 17, a clamping support base 18, a main connecting rod 19, a secondary connecting rod 20, a driven connecting rod 21, a connecting rod connecting plate 22, a screw rod 23, a connecting rod shaft 24, a gearbox 25, a limit screw 30, a gear 26 and a handle 27. The clamping support base 18 is fixedly installed on the clamping support plate 28. The clamping pressing plate 17 is arranged on the top of the clamping support base 18. The gearbox 25 is fixedly installed at the rear end of the clamping support base 18. A threaded hole is opened on the outer wall of the gearbox 25, and the limit screw 30 is fixedly installed in the threaded hole. The gear 26 is movably installed in the right end chamber of the gearbox 25. The handle 27 is fixedly installed on the outer wall of the gear 26. The handle 27 is rotatable relative to the gearbox 25. A through hole is opened on the top of the gearbox 25, and the screw rod 23 is movably installed in the hole. The screw rod 23 is meshed with the gear 26. The connecting rod connecting plate 22 is fixedly installed at the top of the screw rod 23. The secondary connecting rods 20 are movably installed on both sides of the rear end of the connecting rod connecting plate 22. The ends of the secondary connecting rods 20 are movably connected to the ends of the clamping pressing plate 17. The main connecting rods 19 are movably installed on both sides of the top of the clamping support base 18. The ends of the main connecting rods 19 are movably connected to the middle of the clamping pressing plate 17. The driven connecting rods 21 are movably installed on both sides of the front end of the connecting rod connecting plate 22. The ends of the driven connecting rods 21 are movably connected to the main connecting rods 19.

[0041] In this embodiment, the connecting rod clamping device 401 is added. When the handle 27 is manually rotated to drive the gear 26 to rotate counterclockwise, since the gear 26 is meshed with the screw rod 23, the screw rod 23 moves up and down. When the screw rod 23 moves downward, it drives the connecting rod connecting plate 22 welded thereto to move downward. Since the connecting rod connecting plate 22 moves downward, the main connecting rod 19, the secondary connecting rod 20 and the driven connecting rod 21 connected thereto move accordingly to form a lever movement, so that the clamping pressing plate 17 at the top contracts downward. On the contrary, it rises and tightens. The clamping pressing plate 17 is fixed and the limit screw 30 can be tightened to prevent loosening during use. The secondary clamping of the connecting rod clamping device enables the wear-resistant alloy detection device 101 to reduce movement during shear detection, increase its stability and facilitate detection.

[0042] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0043] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A test device for detecting the shear strength of wear-resistant alloy blocks, comprising a wear-resistant alloy detection device (101), a press device (201), a sliding fixing device (301), a connecting rod clamping device (401) and a wear-resistant alloy block (501), characterized in that: The wear-resistant alloy detection device (101) includes a fixed bottom plate (1), a grooved bottom plate (2), a profiling support plate (3), an upper pressure plate (4) and a force-applying pressure block (5). A grooved bottom plate (2) is fixedly installed directly above the fixed bottom plate (1). A profiling support plate (3) is fixedly installed on the top of the grooved bottom plate (2). A sector-shaped groove is provided at the right end of the profiling support plate. A wear-resistant alloy block (501) is fixedly installed in the sector-shaped groove. An upper pressure plate (4) is fixedly installed on the top of the profiling support plate (3). An arc-shaped groove is provided in the upper pressure plate (4). A force-applying pressure block (5) is movably installed in the arc-shaped groove. The grooved bottom plate (2), the profiling support plate (3) and the upper pressure plate (4) are fixed on the fixed bottom plate (1) by six groups of upper pressure plate fixing screws. A press device (201) is installed at the bottom of the wear-resistant alloy detection device (101).

2. The test device for detecting the shear strength of wear-resistant alloy blocks according to claim 1, wherein: The press device (201) includes a bottom support platform (7), side support columns (8), a moving crossbeam (9), a pressure application center support seat (10) and a clamping support plate (28). Side support columns (8) are fixedly installed on both the left and right sides of the bottom support platform (7). A moving crossbeam (9) is movably installed between the two groups of side support columns (8). A pressure application center support seat (10) is fixedly installed at the bottom of the moving crossbeam (9). Two groups of clamping support plates (28) are fixedly installed on the outer wall of the bottom support platform (7). A T-shaped groove (29) is provided at the top of the bottom support platform (7). A sliding fixing device (301) is movably installed in the T-shaped groove (29).

3. The testing device for detecting the shear strength of wear-resistant alloy blocks according to claim 2, characterized in that: The sliding fixing device (301) includes a balance pressure plate (11), a balance support block (12), a T-shaped bolt (13), a balance bolt (14), a gasket (15) and a bolt nut (16). A rectangular groove is provided at the top of the balance pressure plate (11). A threaded hole is provided on the right side of the rectangular groove. The bottom of the T-shaped bolt (13) is movably installed in the T-shaped groove (29). The T-shaped bolt (13) is slidably matched with the T-shaped groove (29). The T-shaped bolt (13) is detachable. The T-shaped bolt (13) is movably installed in the rectangular groove. A gasket (15) is movably installed at the top of the rectangular groove. A bolt nut (16) is movably installed at the top of the gasket (15). The bolt nut (16) is threadedly matched with the T-shaped bolt (13). The bottom of the threaded hole of the balance pressure plate (11) is movably installed with a balance support block (12). The balance support block (12) is installed at the bottom of the balance pressure plate (11) through a balance bolt (14). The balance support block (12) is detachable.

4. The testing device for detecting the shear strength of wear-resistant alloy blocks according to claim 2, characterized in that: The connecting rod clamping device (401) includes a clamping pressure plate (17), a clamping support base (18), a main connecting rod (19), a secondary connecting rod (20), a driven connecting rod (21), a connecting rod connecting plate (22), a screw (23), a connecting rod shaft (24), a gearbox (25), a limit screw (30), a gear (26) and a handle (27). The clamping support base (18) is fixedly installed on the clamping support plate (28). The clamping pressure plate (17) is installed on the top of the clamping support base (18). The gearbox (25) is fixedly installed at the rear end of the clamping support base (18). A threaded hole is formed in the outer wall of the gearbox (25), and the limit screw (30) is fixedly installed in the threaded hole. A gear (26) is movably installed in the right end chamber of the gearbox (25). The handle (27) is fixedly installed on the outer wall of the gear (26). The handle (27) is rotatable relative to the gearbox (25). A through hole is formed in the top of the gearbox (25), and the screw (23) is movably installed in the hole. The screw (23) is engaged with the gear (26). The connecting rod connecting plate (22) is fixedly installed at the top of the screw (23). The secondary connecting rods (20) are movably installed on both sides of the rear end of the connecting rod connecting plate (22). The ends of the secondary connecting rods (20) are movably connected to the ends of the clamping pressure plate (17). The main connecting rods (19) are movably installed on both sides of the top of the clamping support base (18). The ends of the main connecting rods (19) are movably connected to the middle of the clamping pressure plate (17). The driven connecting rods (21) are movably installed on both sides of the front end of the connecting rod connecting plate (22). The ends of the driven connecting rods (21) are movably connected to the main connecting rods (19).

5. The test device for detecting the shear strength of wear-resistant alloy blocks according to claim 1, wherein: The wear-resistant alloy block (501) includes a wear-resistant alloy (31), bolts (32), stud bolts (33), and a casting block (34). Four groups of threaded holes are formed in the outer wall of the wear-resistant alloy (31). The bolts (32) are fixedly installed in the left and right groups of threaded holes, and the stud bolts (33) are fixedly installed in the upper and lower groups of threaded holes. The casting block (34) is installed at one end of the bolts (32) and the stud bolts (33).

6. The testing device for detecting the shear strength of wear-resistant alloy blocks according to claim 5, characterized in that: The upper half of the wear-resistant alloy block (501) uses a material with high chromium alloy to enhance wear resistance. The casting block (34) is manufactured by a casting process using Q355B material which is easy to weld.

Images