Die steel bending strength detection device

Abstract

The invention relates to the technical field of detection, in particular to a die steel bending strength detection device which comprises a rack, a pressing head and two supporting assemblies, the pressing head is arranged on the upper portion of the rack, the axis of the pressing head is vertical, the pressing head can move along the axis of the pressing head, the number of the supporting assemblies is two, and the two supporting assemblies are symmetrically arranged on the lower portion of the rack with the axis of the pressing head as the symmetry axis. The supporting assembly comprises a supporting frame and a supporting roller, the supporting frame is arranged on the lower portion of the rack, the supporting roller is arranged on the supporting frame, and a working cambered surface is formed in one side of the supporting roller in the circumferential direction. According to the bending device, the supporting roller is arranged, the working cambered surface is formed on the supporting roller, and after the working cambered surface is formed on the surface of the supporting roller, the difference value between the arc length between the lower surface of the sample and the tangent point of the supporting roller and the distance between the lower surface of the sample and the tangent point of the supporting roller before bending can be reduced, so that the error is maintained within a reasonable range as far as possible; and failure of a detection result caused by an overlarge error is prevented.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, in particular to a device for detecting the bending strength of mold steel. Background Art

[0002] Testing the bending strength of mold steel is an important step in evaluating its mechanical properties, which is crucial to ensuring the reliability and durability of the mold in actual use. In the existing technology, a universal material testing machine is often used to apply a static load to the sample (mold steel) and measure the deformation. Taking the three-point bending test method as an example, before the test, the sample needs to be placed on the support fixture, and the center of the sample is located directly below the hydraulic punch. Next, the hydraulic press is started, and the hydraulic press applies a static load of a preset value at a preset loading rate. After maintaining it for a certain period of time, the hydraulic punch of the hydraulic press is moved up, and finally the sample is removed from the fixture. The bending strength of the sample is calculated based on the test results.

[0003] in: (MPa); (F): Maximum load (N); (L): horizontal distance between two support points (mm); (b): specimen width (mm); (d): specimen thickness (mm); In this calculation formula, L is actually the specimen surface span. When the steel bending amount is less than the preset value, the arc length of the specimen's lower surface between the two support points is approximately equal to the horizontal spacing between the two support points. In this case, the calculation error is within a reasonable range, and the formula is valid. However, when the steel bending amount is greater than the preset value, the arc length of the specimen's lower surface between the two support points is significantly greater than the horizontal spacing between the two support points. In this case, if the horizontal spacing between the two support points is still used as the arc length of the specimen's lower surface between the two support points, the error in the above formula for calculating the specimen's bending strength will deviate from the reasonable range, causing the formula to be invalid. Summary of the Invention

[0004] Based on this, it is necessary to provide a mold steel bending strength detection device to address the problems existing in the current steel bending strength detection, so as to solve the problem that the error of the sample bending strength detection is too large when the bending amount of the sample is greater than the preset value.

[0005] The above purpose is achieved through the following technical solutions: A die steel bending strength testing device is used to test the bending strength of a die steel sample, comprising: frame; The pressure head is arranged on the upper part of the frame, the axis of the pressure head is vertical, and the pressure head can move along its axis; There are two support assemblies, which are symmetrically arranged at the lower part of the frame with the axis of the pressure head as the symmetry axis; The support assembly includes a support frame and a support roller. The support frame is arranged at the lower part of the frame. The support roller is arranged on the support frame. A working arc surface is opened on one circumferential side of the support roller. The curvature radius of the working arc surface is greater than the radius of the support roller. In the initial state, the specimen is in line contact with the non-working arc surface of the support roller; In the working state, the sample is in line contact with the working arc surface of the support roller.

[0006] Preferably, the support assembly further comprises two groups of support tubes, the two groups of support tubes being respectively arranged at both ends of the support roller, each group comprising a plurality of support tubes, the plurality of support tubes being nested in sequence from the inside out, and two adjacent support tubes being able to move relative to each other along their axes; A working arc surface is also provided on one circumferential side of the outer periphery of the support tube, and the curvature radius of the working arc surface is greater than the outer diameter of the corresponding support tube; In the initial state, the two groups of support tubes elastically abut against each other.

[0007] Preferably, the mold steel bending strength detection device further includes a control component, which is used to control two support tubes with the same diameter in the two groups of support tubes to move away from or closer to each other.

[0008] Preferably, the control component includes a stop ring, a sliding frame and a guide column. There are multiple stop rings, and the multiple stop rings correspond one-to-one to the multiple support tubes, and the stop ring is arranged at one end of the support tube close to the support frame. There are two sliding frames, and the two sliding frames are respectively fixedly connected to the stop ring with the largest diameter in the two groups of support tubes. There are two guide columns, and the two guide columns are respectively arranged at the lower ends of the two sliding frames. The two guide columns can approach or move away from each other along the axis of the support roller.

[0009] Preferably, the mold steel bending strength detection device further includes a driving component, and the driving component is used to control the two guide pillars to move closer to or away from each other.

[0010] Preferably, the driving assembly includes a guide plate, a threaded block and a bidirectional screw. The guide plate is arranged at the lower part of the frame. A guide groove is provided on the upper surface of the guide plate. The guide column is slidably connected in the guide groove. The screw is rotatably arranged at the lower part of the frame. There are two threaded blocks, which are respectively threadedly connected to the two ends of the bidirectional screw, and the two threaded blocks are respectively connected to the support frames of the corresponding support assemblies.

[0011] Preferably, the drive assembly further includes a handwheel, which is fixedly connected to one end of the bidirectional lead screw.

[0012] Preferably, a servo motor is provided on the frame, and an output end of the servo motor is fixedly connected to one end of the bidirectional lead screw.

[0013] Preferably, the guide groove includes a first horizontal segment, a second horizontal segment and a third horizontal segment, and the first horizontal segment, the second horizontal segment and the third horizontal segment are arranged on the guide plate from outside to inside in a direction perpendicular to the axis of the bidirectional screw, and the first horizontal segment and the second horizontal segment, as well as the second horizontal segment and the third horizontal segment are smoothly connected through the guide bevel groove.

[0014] Preferably, the mold steel bending strength detection device further comprises a hydraulic press, the axis of the hydraulic press is vertical, the fixed end of the hydraulic press is arranged on the upper part of the frame, and the output end of the hydraulic press is fixedly connected to the pressure head.

[0015] The beneficial effects of the present invention are: The present invention provides a support roller, and a working arc surface is opened on the support roller. After the working arc surface is opened, the difference between the arc length between the tangent point of the lower surface of the sample and the support roller and the distance between the tangent point of the lower surface of the sample and the support roller before bending is smaller than the difference between the arc length between the tangent point of the lower surface of the sample and the support roller and the distance between the tangent point of the lower surface of the sample and the support roller before bending when the working arc surface is not opened. Therefore, after the working arc surface is opened on the surface of the support roller, the difference between the arc length between the tangent point of the lower surface of the sample and the support roller and the distance between the tangent point of the lower surface of the sample and the support roller before bending can be reduced, so that the error is maintained within a reasonable range as much as possible, thereby preventing the detection result from being invalid due to excessive error. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a mold steel bending strength detection device of the present invention; Figure 2 A half-section isometric view of a support assembly in a device for detecting bending strength of mold steel according to the present invention; Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle; Figure 4 This is a schematic diagram of the connection structure of a support frame in a mold steel bending strength testing device of the present invention; Figure 5 This is a schematic structural diagram of a support roller in a device for detecting bending strength of mold steel according to the present invention; Figure 6 This is a schematic structural diagram of a support tube in a device for testing the bending strength of mold steel according to the present invention; Figure 7 This is a schematic structural diagram of a sliding frame in a device for detecting the bending strength of mold steel according to the present invention; Figure 8 This is a structural schematic diagram of a guide plate in a mold steel bending strength testing device of the present invention; Figure 9This is a schematic diagram of a first state of a supporting component in a mold steel bending strength testing device according to the present invention; Figure 10 This is a schematic diagram of a second state of a supporting component in a mold steel bending strength testing device according to the present invention; Figure 11 This is a schematic diagram of a third state of a support component in a mold steel bending strength testing device according to the present invention; Figure 12 This is a schematic diagram of the principle of a device for detecting the bending strength of mold steel according to the present invention.

[0017] in: 100, rack; 200, pressure head; 300, support assembly; 310, support frame; 320, support roller; 321, working arc surface; 330, support tube; 400, control assembly; 410, stop ring; 420, sliding frame; 430, guide column; 500, drive assembly; 510, guide plate; 520, threaded block; 530, bidirectional lead screw; 540, guide groove; 541, first horizontal section; 542, second horizontal section; 543, third horizontal section; 544, guide chute; 550, handwheel; 600. Sample. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0020] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0021] like Figures 1 to 12 As shown, a mold steel bending strength testing device is used to test the bending strength of a mold steel sample 600. The mold steel bending strength testing device includes a frame 100, a pressing head 200 and a support assembly 300. The pressing head 200 is arranged on the upper part of the frame 100. The axis of the pressing head 200 is vertical and the pressing head 200 can move along its axis. There are two support assemblies 300. The two support assemblies 300 are symmetrically arranged on the lower part of the frame 100 with the axis of the pressing head 200 as the symmetry axis. The component 300 includes a support frame 310 and a support roller 320. The support frame 310 is arranged at the lower part of the frame 100, and the support roller 320 is arranged on the support frame 310. A working arc surface 321 is opened on one circumferential side of the support roller 320. The curvature radius of the working arc surface 321 is greater than the radius of the support roller 320. In the initial state, the sample 600 is in line contact with the non-working arc surface of the support roller 320. In the working state, the sample 600 is in line contact with the working arc surface 321 of the support roller 320.

[0022] During the test, the staff placed the sample 600 on the two support rollers 320 and adjusted the position of the sample 600 so that the center of the sample 600 was directly below the indenter 200. At this time, the surface span of the sample 600 was equal to the horizontal distance between the tangent points of the sample 600 and the support rollers 320. At this time, the positional relationship between the sample 600 and the support rollers 320 is as follows: Figure 12 As shown in a, the sample 600 is now in line contact with the non-working arc surface 321 of the support roller 320, and the surface span of the sample 600 is the length between d1 and d2. Next, the staff moves the indenter 200 downward along its axis. When the indenter 200 contacts the middle position of the sample 600, as the indenter 200 continues to move downward, the indenter 200 applies a static load to the sample 600, and the sample 600 gradually bends into an arch with the opening facing upward. At this time, the arc length between the tangent point of the lower surface of the sample 600 and the support roller 320 is greater than the distance between the tangent point of the lower surface of the sample 600 and the support roller 320 before bending. Assuming that the surface of the support roller 320 does not have a working arc surface 321, the positional relationship between the sample 600 and the support roller 320 at this time is as follows: Figure 12As shown in b, the surface span of the sample 600 is the arc length between d3 and d4. Furthermore, as the degree of bending of the sample 600 increases, the difference between the arc length between the tangent point of the lower surface of the sample 600 and the support roller 320 and the distance between the tangent points of the lower surface of the sample 600 and the support roller 320 before bending becomes increasingly larger. This causes the error in the surface span to deviate from the reasonable range, causing the formula to fail. After a working arc surface 321 is provided on one circumferential side of the support roller 320, in the working state (i.e., after the sample 600 is bent), the sample 600 and the working arc surface 321 of the support roller 320 are in line contact (i.e., tangent). At this time, the positional relationship between the sample 600 and the support roller 320 is as follows: Figure 12 As shown in c, since the curvature radius of the working arc surface 321 is greater than the radius of the support roller 320, Compared to d3, it is closer to d1. Compared with d4, it is closer to d2. It can be found that after the working arc surface 321 is opened, the difference between the arc length between the tangent point of the lower surface of the sample 600 and the support roller 320 and the distance between the tangent point of the lower surface of the sample 600 and the support roller 320 before bending is smaller than the difference between the arc length between the tangent point of the lower surface of the sample 600 and the support roller 320 and the distance between the tangent point of the lower surface of the sample 600 and the support roller 320 before bending when the working arc surface 321 is not opened. Therefore, after the working arc surface 321 is opened on the surface of the support roller 320, the difference between the arc length between the tangent point of the lower surface of the sample 600 and the support roller 320 and the distance between the tangent point of the lower surface of the sample 600 and the support roller 320 before bending can be reduced, so that the error is maintained within a reasonable range as much as possible, preventing the test result from being invalid due to excessive error.

[0023] It should also be noted that the mold steel bending strength testing device also includes a hydraulic press. The hydraulic press has a vertical axis, a fixed end disposed on the upper portion of the frame 100, and an output end of the hydraulic press is fixedly connected to the ram 200. When the ram 200 needs to move along its axis, the hydraulic press is activated, and the hydraulic press drives the ram 200 to move along its axis.

[0024] In order to evaluate the performance of mold steel under different loading conditions, a plurality of specimens 600 of different lengths are usually selected for bending tests in the bending strength test of mold steel (usually 80 mm, 100 mm and 120 mm). A longer span is required for a longer specimen 600, and a shorter span is required for a shorter specimen 600. For specimens 600 with different spans, when they are tangent to the working arc surface 321 on the support roller 320, the difference between the arc length between the tangent point of the lower surface of the specimen 600 and the support roller 320 and the distance between the tangent point of the lower surface of the specimen 600 and the support roller 320 before bending is different. If the length is 80 mm, The difference between the arc length between the tangent point of the lower surface of the sample 600 and the support roller 320 and the distance between the tangent point of the lower surface of the sample 600 and the support roller 320 before bending is the smallest, then the difference between the arc length between the tangent point of the lower surface of the sample 600 and the support roller 320 with a length of 120 mm and the distance between the tangent point of the lower surface of the sample 600 and the support roller 320 before bending will increase, and may increase to deviate from the reasonable range. To solve this problem, it is necessary to provide a plurality of working arc surfaces 321 with different diameters so that samples 600 of different lengths are supported by suitable working arc surfaces 321. To solve this problem, in this embodiment, if Figure 1 and Figure 3 As shown, the span between the two support assemblies 300 is adjustable, and the support assembly 300 also includes two groups of support tubes 330. The two groups of support tubes 330 are respectively arranged at both ends of the support roller 320. Each group includes multiple support tubes 330. The multiple support tubes 330 are nested in sequence from the inside to the outside. The two adjacent support tubes 330 can move relative to each other along their axes. A working arc surface 321 is also opened on one side of the outer circumference of the support tube 330. The curvature radius of the working arc surface 321 is greater than the outer diameter of the corresponding support tube 330. In the initial state, the two groups of support tubes 330 elastically abut each other. The mold steel bending strength detection device also includes a control component 400. The control component 400 is used to control the two groups of support tubes. Two support tubes 330 with the same diameter in the tube 330 move away from or approach each other. The control component 400 includes a stop ring 410, a sliding frame 420 and a guide column 430. There are multiple stop rings 410, and the multiple stop rings 410 correspond one-to-one to the multiple support tubes 330. The stop ring 410 is set at one end of the support tube 330 close to the support frame 310. There are two sliding frames 420, and the two sliding frames 420 are respectively fixedly connected to the stop ring 410 with the largest diameter in the two groups of support tubes 330. There are two guide columns 430, and the two guide columns 430 are respectively set at the lower ends of the two sliding frames 420. The two guide columns 430 can move towards or away from each other along the axis of the support roller 320.

[0025] like Figure 3For example, there are two support tubes 330 sleeved outside the support roller 320, so it can be used to detect three samples 600 of different lengths. The working arc surface 321 on the large-diameter support tube 330 is set to adapt to the longest sample 600, the working arc surface 321 on the small-diameter support tube 330 is set to adapt to the second longest sample 600, and the working arc surface 321 on the support roller 320 is adapted to the shortest sample 600.

[0026] In the initial state of the device, Figure 9 As shown, the spring connected to the retaining ring 410 is at its maximum compression. At this time, the support roller 320 is exposed, so it can be used to detect the shortest sample 600. At this time, the working arc surface 321 opened on the surface of the support roller 320 is exposed. The staff can place the shortest sample 600 on the support roller 320 for testing. After the shortest sample 600 is tested, the second longest sample 600 is tested next. At this time, the staff first increases the distance between the two support components 300 so that the distance between the two support components 300 meets the standard, and then makes the distance between the support components 300 meet the standard. The two corresponding guide pillars 430 approach each other, and at this time the guide pillars 430 drive the corresponding sliding frames 420 to approach each other. At this time, the compression of the spring corresponding to the small diameter support tube 330 is reduced. Under the action of the spring force, the two small diameter support tubes 330 gradually abut against each other. At this time, the staff can place the second longest sample 600 on the small diameter support tube 330, and perform a bending strength test on the second longest sample 600. After the test of the second longest sample 600 is completed, the longest sample 600 will be tested next. The process is the same as the above description, and the details will not be repeated.

[0027] In this embodiment, if Figure 1 and Figure 8As shown, the mold steel bending strength testing device also includes a driving assembly 500, which is used to control the two guide pillars 430 to move closer to or away from each other. The driving assembly 500 includes a guide plate 510, a threaded block 520 and a bidirectional screw 530. The guide plate 510 is arranged at the lower part of the frame 100. The upper surface of the guide plate 510 is provided with a guide groove 540. The guide pillar 430 is slidably connected in the guide groove 540. The guide groove 540 includes a first horizontal section 541, a second horizontal section 542 and a third horizontal section 543. The first horizontal section 541 and the second horizontal section 542 are respectively 542 and the third horizontal section 543 are arranged on the guide plate 510 from outside to inside in a direction perpendicular to the axis of the bidirectional screw 530. The first horizontal section 541 and the second horizontal section 542, as well as the second horizontal section 542 and the third horizontal section 543 are smoothly connected through the guide bevel 544. The bidirectional screw 530 is rotatably set at the lower part of the frame 100. There are two threaded blocks 520, and the two threaded blocks 520 are respectively threadedly connected to the two ends of the bidirectional screw 530, and the two threaded blocks 520 are respectively connected to the support frame 310 of the corresponding support assembly 300.

[0028] In the initial state, the guide post 430 is located in the third horizontal section 543, and the support roller 320 is exposed at this time. Therefore, it can be used to detect the sample 600 with the shortest length. When it is necessary to detect the sample 600 with a diameter in the middle, the guide post 430 is required to move from the third horizontal section 543 to the second horizontal section 542. Specifically, the staff rotates the bidirectional screw 530, and the bidirectional screw 530 drives the threaded blocks 520 connected at both ends thereof to approach each other. The threaded blocks 520 drive the support frame 310 to move synchronously, and the support frame 310 drives the sliding frame 420 to move synchronously along the axis of the bidirectional screw 530. At the same time, since the guide post 430 is slidably connected to the third horizontal section 543, In the horizontal section 543, as the sliding frame 420 follows the support frame 310 and moves synchronously along the axis of the bidirectional screw 530, the guide column 430 moves into the second horizontal section 542 through the guide bevel 544. At this time, the support tube 330 with a smaller diameter is exposed, and the two support tubes 330 with smaller diameters abut against each other. The staff can place the second longest sample 600 on the two support tubes 330. When it is necessary to monitor the second longest sample 600, similarly, the staff can rotate the bidirectional screw 530 so that the two support tubes 330 with larger diameters abut against each other. At this time, the longest sample 600 can be placed on the two support tubes 330 for testing.

[0029] In this embodiment, the driving assembly 500 further includes a handwheel 550 , which is fixedly connected to one end of the bidirectional lead screw 530 .

[0030] During use, the staff can rotate the hand wheel 550 to drive the bidirectional lead screw 530 to rotate synchronously.

[0031] In this embodiment, a servo motor is provided on the frame 100 , and an output end of the servo motor is fixedly connected to one end of the bidirectional lead screw 530 .

[0032] In addition to the manual operation mode mentioned above, a servo motor can also be set to control the rotation of the bidirectional screw 530. In this case, the rotation of the bidirectional screw 530 can be accurately controlled by the rotation of the servo motor, thereby controlling the two guide pillars 430 to move closer to or away from each other.

[0033] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A die steel bending strength testing device, used to test the bending strength of a die steel sample, characterized in that: include: frame; The pressure head is arranged on the upper part of the frame, the axis of the pressure head is vertical, and the pressure head can move along its axis; There are two support assemblies, which are symmetrically arranged at the lower part of the frame with the axis of the pressure head as the symmetry axis; The support assembly includes a support frame and a support roller. The support frame is arranged at the lower part of the frame. The support roller is arranged on the support frame. A working arc surface is opened on one circumferential side of the support roller. The curvature radius of the working arc surface is greater than the radius of the support roller. In the initial state, the specimen is in line contact with the non-working arc surface of the support roller; In the working state, the sample is in line contact with the working arc surface of the support roller.

2. A mold steel bending strength detection device according to claim 1, characterized in that: The support assembly further includes two groups of support tubes, which are respectively arranged at both ends of the support roller, each group including a plurality of support tubes, which are nested in sequence from the inside to the outside, and two adjacent support tubes can move relative to each other along their axes; A working arc surface is also provided on one circumferential side of the outer periphery of the support tube, and the curvature radius of the working arc surface is greater than the outer diameter of the corresponding support tube; In the initial state, the two groups of support tubes elastically abut against each other.

3. A mold steel bending strength detection device according to claim 2, characterized in that: The mold steel bending strength detection device further includes a control component, which is used to control two support tubes with the same diameter in the two groups of support tubes to move away from or approach each other.

4. A mold steel bending strength detection device according to claim 3, characterized in that: The control component includes a stop ring, a sliding frame and a guide column. There are multiple stop rings, and the multiple stop rings correspond one to one with the multiple support tubes. The stop ring is set at one end of the support tube close to the support frame. There are two sliding frames, and the two sliding frames are respectively fixedly connected to the stop ring with the largest diameter in the two groups of support tubes. There are two guide columns, and the two guide columns are respectively set at the lower ends of the two sliding frames. The two guide columns can approach or move away from each other along the axis of the support roller.

5. A mold steel bending strength detection device according to claim 4, characterized in that: The mold steel bending strength detection device further includes a driving component, which is used to control the two guide pillars to move closer to or farther away from each other.

6. A mold steel bending strength detection device according to claim 5, characterized in that: The driving assembly includes a guide plate, a threaded block and a bidirectional screw. The guide plate is arranged at the lower part of the frame. A guide groove is opened on the upper surface of the guide plate. The guide column is slidably connected in the guide groove. The screw is rotatably arranged at the lower part of the frame. There are two threaded blocks, which are respectively threadedly connected to the two ends of the bidirectional screw, and the two threaded blocks are respectively connected to the support frames of the corresponding support assemblies.

7. A mold steel bending strength detection device according to claim 6, characterized in that: The driving assembly also includes a handwheel, which is fixedly connected to one end of the bidirectional lead screw.

8. The mold steel bending strength detection device according to claim 6, characterized in that: A servo motor is provided on the frame, and an output end of the servo motor is fixedly connected to one end of a bidirectional lead screw.

9. The mold steel bending strength detection device according to claim 6, characterized in that: The guide groove includes a first horizontal section, a second horizontal section and a third horizontal section. The first horizontal section, the second horizontal section and the third horizontal section are arranged on the guide plate from outside to inside in a direction perpendicular to the axis of the bidirectional screw. The first horizontal section and the second horizontal section, as well as the second horizontal section and the third horizontal section are smoothly connected through the guide bevel groove.

10. The mold steel bending strength detection device according to claim 1, characterized in that: The mold steel bending strength detection device also includes a hydraulic press, the axis of the hydraulic press is vertical, the fixed end of the hydraulic press is arranged on the upper part of the frame, and the output end of the hydraulic press is fixedly connected to the pressure head.

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