Hardness detection device and detection method for forge piece

Abstract

The invention relates to the technical field of mechanical hardness detection, in particular to a hardness detection device for forgings and a detection method.The hardness detection device comprises a workbench, a lifting frame and a third fixing frame, a third transmission gear is rotationally installed on the inner wall of the lifting frame, a third rotating shaft is slidably connected to the inner wall of the third transmission gear, and the third rotating shaft penetrates through the lifting frame; the device has the beneficial effects that a second hydraulic push rod is started to enable the output end of the second hydraulic push rod to move downwards, so that a bearing main body falls onto the surfaces of the first rotating shaft and the second rotating shaft, and the bearing main body rotates along with downward movement of a lifting frame; the rotation of the bearing main body enables the clamped and covered position of the bearing main body to be exposed outside, then after the second hydraulic push rod is started to move upwards, the clamped position of the bearing main body is changed, the originally clamped position faces the detection pressing head, and more dead angle positions of the bearing main body can be pressed, detected and covered.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical hardness detection, in particular to a hardness detection device and a detection method for forgings. Background Art

[0002] During the production process of forgings, random inspections are required for hardness testing. During use, hardness testing devices for forgings are divided into two types: contact testing and non-contact testing. Contact testing is usually used to test the hardness of the forging surface. Contact testing is usually performed using a Rockwell hardness tester. The metal ball at the detection head of the detection device presses the surface of the forging to be tested, and the electrical signal is transmitted through the mechanical sensor in the device, so that the detection head applies the same pressure to the forging surface each time and then stops pressing the forging. The high-definition camera on the device observes the pits on the forging surface pressed by the detection head to calculate the hardness value.

[0003] In the use of existing hardness testing devices currently on the market, when testing some cylindrical flanges and bearings, it is necessary to test multiple areas on the surface of the bearing. However, when the bearing position is clamped and limited by the clamping device, more than half of the outer wall of the bearing is blocked by the clamping device. After the experimenter has completely tested the exposed surface of the bearing, he needs to release the clamping operation of the clamping device on the bearing, remove the bearing and adjust it again before exposing the clamped position of the bearing for testing, which affects the efficiency of the overall test. Therefore, a hardness testing device is needed to solve this problem. Summary of the Invention

[0004] The present invention provides a hardness testing device and testing method for forgings, which has the beneficial effect of facilitating the switching of the clamping position of the forging and facilitating the switching and testing of more positions of the forging, and solves the problem mentioned in the above background technology that the experimenter needs to release the clamping operation of the clamping device on the bearing after completely testing the exposed surface of the bearing, and then remove the bearing and adjust it again before the clamped position of the bearing can be exposed for testing, which affects the efficiency of the overall testing. To achieve the above object, the present invention provides the following technical solution: A hardness testing device for forgings includes a workbench, a lifting frame and a third fixed frame, the inner wall of the lifting frame is rotatably mounted with a third transmission gear, the inner wall of the third transmission gear is slidably connected to a third rotating shaft, the third rotating shaft passes through the lifting frame, one end of the third rotating shaft is fixedly connected to a second sliding block, the outer wall of the second sliding block is slidably connected to the second fixed frame, the outer wall of the second fixed frame is fixedly connected to a fifth transmission gear, one end of the fifth transmission gear is fixedly connected to a guide rod, the inner wall of the third fixed frame is provided with a track groove, and the guide rod is slidably connected to the inner wall of the track groove.

[0005] Preferably, the inner wall of the lifting frame is rotatably connected to the first rotating shaft and the second rotating shaft, the outer walls of the first rotating shaft and the second rotating shaft are respectively fixedly connected to the fourth transmission gear and the second transmission gear, the fourth transmission gear and the second transmission gear are both meshed with the outer wall of the third transmission gear, the first rotating shaft and the second rotating shaft are set as rubber rods, the first rotating shaft and the second rotating shaft are used to rotate the bearing body, and the bearing body is in conflict with the outer walls of the first rotating shaft and the second rotating shaft.

[0006] Preferably, a sliding groove is formed on the outer wall of the second fixed frame, a third guide rod is fixedly connected to the inner wall of the sliding groove, a second sliding block is slidably connected to the outer wall of the third guide rod, a first return spring is fixedly connected to the outer wall of the second sliding block, and the other end of the first return spring is fixedly connected to the inner wall of the sliding groove;

[0007] The third rotating shaft is configured as a prismatic shaft, and the outer wall of the third rotating shaft is sleeved with a second return spring, one end of the second return spring is fixedly connected to the outer wall of the second sliding block, and the other end of the second return spring is fixedly connected to a turntable, and the turntable is rotatably connected to the outer wall of the lifting frame, and the third rotating shaft passes through the turntable.

[0008] Preferably, the third fixed frame is fixedly connected to the outer wall of the workbench, the inner wall of the third fixed frame is fixedly connected to a second transmission rack, and the second transmission rack is meshed with a fifth transmission gear.

[0009] Preferably, the inner wall of the third fixed frame is fixedly connected to two fixing frames, the outer wall of the fixing frame is rotatably connected to a fifth rotating shaft, the other end of the fifth rotating shaft is rotatably connected to the inner wall of the track groove, the outer wall of the fifth rotating shaft is sleeved with a torsion spring, one end of the torsion spring is fixedly connected to the outer wall of the fixing frame, the other end of the torsion spring is fixedly connected to a limit plate, the limit plate is fixedly connected to the outer wall of the fifth rotating shaft, the inner wall of the track groove is fixedly connected to a limit protrusion for limiting the position of the limit plate, and the inner wall of the track groove is fixedly connected to a hemispherical protrusion.

[0010] Preferably, the outer wall of the workbench is fixedly connected to a first fixed frame, the inner wall of the first fixed frame is fixedly connected to a first transmission rack, the outer wall of the first transmission rack is meshedly connected to a first transmission gear, and the outer wall of the first transmission gear is fixedly connected to a rotating rod.

[0011] Preferably, the outer wall of the rotating rod is provided with a first thread groove and a second thread groove, the first thread groove and the second thread groove are thread grooves in opposite directions, the outer walls of the first thread groove and the second thread groove are both threadedly connected with a first sliding block, the inner wall of the first sliding block is slidably connected with a second guide rod, the two ends of the second guide rod are fixedly connected to the inner wall of the lifting frame, and the outer wall of the first sliding block is fixedly connected with a limit block for limiting the position of the bearing body.

[0012] Preferably, a second hydraulic push rod is fixedly installed inside the workbench, and an output end of the second hydraulic push rod is fixedly connected to the outer wall of the lifting frame.

[0013] Preferably, the outer wall of the workbench is fixedly installed with a detection device body, the outer wall of the detection device body is fixedly installed with a first hydraulic push rod, the outer wall of the detection device body is fixedly connected with a first guide rod, the output end of the first hydraulic push rod is fixedly installed with a lifting plate, the outer wall of the lifting plate is fixedly installed with a detection pressing head, and the lifting plate is slidably sleeved on the outer wall of the first guide rod.

[0014] The present invention also discloses a method for testing the hardness of forgings, which comprises the following steps:

[0015] S1. Start the second hydraulic push rod until the bearing body is supported between the two limit blocks. At this time, the position of the bearing body is restricted.

[0016] S2. Start the first hydraulic push rod to move the detection pressing head downward synchronously to perform a pressing test on the surface of the bearing body;

[0017] S3. Start the second hydraulic push rod to move its output end downward, exposing the clamped position of the bearing body upward, so that the testing pressing head can continue to perform hardness testing on other curved surface positions of the bearing body;

[0018] S4. Start the second hydraulic push rod to move its output end downward, so that the bearing body moves a distance away from the third rotating shaft, ensuring that the longitudinal position of the bearing body is different when it is pressed by the pressing head again.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, the second hydraulic push rod is started to move its output end downward, so that the bearing body falls onto the surface of the first rotating shaft and the second rotating shaft, and as the lifting frame moves downward, the bearing body rotates. The rotation of the bearing body exposes the position where it is clamped and covered. Then, the second hydraulic push rod is started to move upward, so that the clamped position of the bearing body is changed, so that the originally clamped position is facing the detection pressing head, so that more blind spots of the bearing body can be covered by pressing detection.

[0021] 2. In the present invention, by starting the second hydraulic push rod to move its output end downward, the longitudinal detection position of the bearing body relative to the detection pressing head is changed, so that the bearing body changes its longitudinal position while changing its curved surface detection position, thereby increasing the coverage of the blind angle of the detection pressing head for the bearing body surface hardness detection and increasing the accuracy of the detection.

[0022] 3. In the present invention, when the second hydraulic push rod is started to move the lifting frame upward and reset, the guide rod can only slide to the upper right along the lower bend of the track groove into the right straight groove of the track groove, so that the fifth transmission gear is disengaged from the meshing state with the second transmission rack, preventing the detected side of the bearing body from rotating upward during the upward reset process of the fifth transmission gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the lifting frame and its surrounding structures of the present invention;

[0026] Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram;

[0027] Figure 5 It is a schematic diagram of the first fixing frame and its surrounding structures of the present invention;

[0028] Figure 6 is a schematic diagram of the third fixing frame and its surrounding structures of the present invention;

[0029] Figure 7 It is a partial enlarged structural diagram of the third fixing frame of the present invention;

[0030] Figure 8 It is an enlarged structural diagram of the peripheral structure of the third fixing frame of the present invention;

[0031] Figure 9 is a schematic cross-sectional structural diagram of a third fixing frame of the present invention;

[0032] Figure 10 For the present invention Figure 9 Enlarged structural diagram at point B in the middle.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Workbench; 3. First hydraulic push rod; 4. First guide rod; 5. Detection device body; 7. Lifting plate; 8. Detection pressing head; 10. Second hydraulic push rod; 12. Lifting frame; 13. First fixed frame; 14. First transmission rack; 15. First transmission gear; 16. Rotating rod; 17. Second guide rod; 19. First sliding block; 21. Limiting block; 22. Bearing body; 24. First rotating shaft; 25. Second rotating shaft; 26. Second transmission gear; 27. Third transmission Gear; 28. Fourth transmission gear; 29. ​​Third rotating shaft; 30. Second sliding block; 31. Second fixed frame; 32. Slide groove; 33. Third guide rod; 34. First return spring; 35. Fifth transmission gear; 36. Second transmission rack; 37. Third fixed frame; 38. Guide rod; 39. Track groove; 40. Fixed frame; 41. Fifth rotating shaft; 42. Torsion spring; 43. Limit plate; 44. Limiting protrusion; 46. First thread groove; 47. Second thread groove; 48. Hemispherical protrusion; 49. Second return spring; 50. Turntable. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 efforts are within the scope of protection of the present invention.

[0035] Example 1: This example solves the problem that after the tester has completely tested the exposed surface of the bearing, he needs to release the clamping device from the bearing, remove the bearing again and adjust it before the clamped position of the bearing can be exposed for testing, which affects the efficiency of the overall test. Figure 1 - Figure 10 A hardness testing device for forgings includes a workbench 1, a lifting frame 12 and a third fixed frame 37. The inner wall of the lifting frame 12 is rotatably installed with a third transmission gear 27. The inner wall of the third transmission gear 27 is slidably connected with a third rotating shaft 29. The third rotating shaft 29 passes through the lifting frame 12. One end of the third rotating shaft 29 is fixedly connected with a second sliding block 30. The outer wall of the second sliding block 30 is slidably connected with a second fixed frame 31. The outer wall of the second fixed frame 31 is fixedly connected with a fifth transmission gear 35. One end of the fifth transmission gear 35 is fixedly connected with a guide rod 38. A track groove 39 is opened on the inner wall of the third fixed frame 37. The guide rod 38 is slidably connected to the inner wall of the track groove 39.

[0036] The inner wall of the lifting frame 12 is rotatably connected to the first and second rotating shafts 24, 25. The outer walls of the first and second rotating shafts 24, 25 are respectively fixedly connected to the fourth transmission gear 28 and the second transmission gear 26. The fourth transmission gear 28 and the second transmission gear 26 are both meshed with the outer wall of the third transmission gear 27. The first and second rotating shafts 24, 25 are configured as rubber rods and are used to rotate the bearing body 22. The bearing body 22 contacts the outer walls of the first and second rotating shafts 24, 25. The outer wall of the second fixed frame 31 is provided with a slide groove 32. The inner wall of the slide groove 32 is fixedly connected to the third guide rod 33. The outer wall of the third guide rod 33 is slidably connected to the second sliding block 30. The outer wall of the second sliding block 30 is fixedly connected to the first return spring 34. The other end of the first return spring 34 is fixedly connected to the inner wall of the slide groove 32.

[0037] The third rotating shaft 29 is configured as a prismatic shaft, and the outer wall of the third rotating shaft 29 is sleeved with a second return spring 49, one end of the second return spring 49 is fixedly connected to the outer wall of the second sliding block 30, and the other end of the second return spring 49 is fixedly connected to a turntable 50, which is rotatably connected to the outer wall of the lifting frame 12, and the third rotating shaft 29 passes through the turntable 50.

[0038] The third fixing frame 37 is fixedly connected to the outer wall of the workbench 1 . The inner wall of the third fixing frame 37 is fixedly connected to the second transmission rack 36 . The second transmission rack 36 and the fifth transmission gear 35 are meshed with each other.

[0039] The inner wall of the third fixed frame 37 is fixedly connected to two fixing frames 40, the outer wall of the fixing frame 40 is rotatably connected to a fifth rotating shaft 41, the other end of the fifth rotating shaft 41 is rotatably connected to the inner wall of the track groove 39, the outer wall of the fifth rotating shaft 41 is sleeved with a torsion spring 42, one end of the torsion spring 42 is fixedly connected to the outer wall of the fixing frame 40, the other end of the torsion spring 42 is fixedly connected to a limiting plate 43, the limiting plate 43 is fixedly connected to the outer wall of the fifth rotating shaft 41, and the inner wall of the track groove 39 is fixedly connected to a limiting protrusion 44 for limiting the position of the limiting plate 43.

[0040] The outer wall of the workbench 1 is fixedly connected to the first fixed frame 13 , the inner wall of the first fixed frame 13 is fixedly connected to the first transmission rack 14 , the outer wall of the first transmission rack 14 is meshedly connected to the first transmission gear 15 , and the outer wall of the first transmission gear 15 is fixedly connected to the rotating rod 16 .

[0041] The outer wall of the rotating rod 16 is provided with a first thread groove 46 and a second thread groove 47. The first thread groove 46 and the second thread groove 47 are thread grooves in opposite directions. The outer walls of the first thread groove 46 and the second thread groove 47 are both threadedly connected with a first sliding block 19. The inner wall of the first sliding block 19 is slidably connected with the second guide rod 17. The two ends of the second guide rod 17 are fixedly connected to the inner wall of the lifting frame 12. The outer wall of the first sliding block 19 is fixedly connected with a limit block 21 for limiting the position of the bearing body 22.

[0042] A second hydraulic push rod 10 is fixedly installed inside the workbench 1 , and an output end of the second hydraulic push rod 10 is fixedly connected to an outer wall of the lifting frame 12 .

[0043] The outer wall of the workbench 1 is fixedly installed with a detection device body 5, the outer wall of the detection device body 5 is fixedly installed with a first hydraulic push rod 3, the outer wall of the detection device body 5 is fixedly connected with a first guide rod 4, the output end of the first hydraulic push rod 3 is fixedly installed with a lifting plate 7, the outer wall of the lifting plate 7 is fixedly installed with a detection pressing head 8, and the lifting plate 7 is slidably sleeved on the outer wall of the first guide rod 4.

[0044] In this embodiment, when using the forging hardness testing device, the forging is first placed on the surface of the first rotating shaft 24 and the second rotating shaft 25, and then the second hydraulic push rod 10 is started. After the second hydraulic push rod 10 is started, the lifting frame 12 at the output end moves upward. During the upward movement of the lifting frame 12, the first transmission gear 15 moves upward along the inner wall of the first fixed frame 13. The moving trajectory of the first transmission gear 15 will mesh with the first transmission rack 14, and the meshing causes the first transmission gear 15 to rotate. When the first transmission gear 15 rotates, it drives the rotating rod 16 rotates synchronously. When the rotating rod 16 rotates, the two first sliding blocks 19 threadedly sleeved on the outer wall thereof approach each other along the guide of the second guide rod 17. The mutual approach of the first sliding blocks 19 brings the two limit blocks 21 synchronously approach each other. At this time, the inclined surfaces of the outer walls of the two limit blocks 21 clamp the bearing bodies 22 on the first rotating shaft 24 and the second rotating shaft 25. The clamping causes the bearing bodies 22 to be squeezed and moved upward along the inclined surfaces of the limit blocks 21 until the bearing bodies 22 are supported between the two limit blocks 21. At this time, the position of the bearing bodies 22 is restricted.

[0045] Then the first hydraulic push rod 3 is started, and the first hydraulic push rod 3 moves downward with the lifting plate 7 at the output end along the guide of the first guide rod 4, prompting the detection pressing head 8 to move downward synchronously to press the surface of the bearing body 22 for detection. The rated pressing force is controlled by the set mechanical sensor in the detection device body 5. After the detection, the detection device body 5 observes the pressing depression on the bearing body 22 through the high-definition camera to calculate the hardness value, and completes the hardness detection of a single point of the bearing body 22.

[0046] When it is necessary to detect other positions of the outer wall curved surface of the bearing body 22, the second hydraulic push rod 10 is started, and the output end of the second hydraulic push rod 10 moves the lifting frame 12 downward, and the lifting frame 12 moves downward and moves the first transmission gear 15 downward synchronously. When the first transmission gear 15 moves downward, it engages with the first transmission rack 14, causing the rotating rod 16 to rotate synchronously. The rotating rod 16 rotates in the opposite direction to the previous direction, causing the two first sliding blocks 19 to move away from each other along the outer wall of the second guide rod 17, causing the bearing body 22 to fall from the inclined surfaces of the two limit blocks 21 to the first rotating shaft 24 and the second rotating shaft 25.

[0047] As the lifting frame 12 descends, the fifth transmission gear 35 slides down along the third fixed frame 37. When the fifth transmission gear 35 slides down, it meshes with the second transmission rack 36. The meshing causes the fifth transmission gear 35 to rotate. When the fifth transmission gear 35 rotates, it drives the second fixed frame 31 to rotate. When the second fixed frame 31 rotates, it drives the second sliding block 30 and the third rotating shaft 29 to rotate synchronously, so that the third rotating shaft 29 drives the third transmission gear 27 to rotate synchronously. When the third transmission gear 27 rotates, it meshes with the second transmission gear 26 and the fourth transmission gear 28, so that the second transmission gear 26 and the fourth transmission gear 28 rotate in the same direction. The second transmission gear 26 and the fourth transmission gear 28 drive the second rotating shaft 25 and the first rotating shaft 24 to rotate in the same direction. At this time, the bearing body 22 on the second rotating shaft 25 and the first rotating shaft 24 is driven to rotate by the friction force of the second rotating shaft 25 and the first rotating shaft 24, so that the clamped position of the bearing body 22 is exposed upward.

[0048] At this time, the fifth transmission gear 35 carries the guide rod 38 down along the track groove 39 to the lowest turning point, so that the guide rod 38 slides along the turning point to the lowest point of the track groove 39. Due to the bent track at the turning point of the track groove 39, the guide rod 38 is forced to move to the right with the fifth transmission gear 35. At this time, the fifth transmission gear 35 carries the second fixed frame 31 to move to the right. Since the third rotating shaft 29 is inserted into the lifting frame 12, the third rotating shaft 29 cannot be translated laterally. At this time, the second fixed frame 31 carries the third guide rod 33 to slide along the inner wall of the second sliding block 30, and the first rotating shaft 24 is stretched and tightened during the sliding process, so that the fifth transmission gear 35 moves to the right as a whole, causing the fifth transmission gear 35 to release the meshing state with the second transmission rack 36, and at this time, the sliding guide rod 38 slides against After touching the limit plate 43, the limit plate 43 is prompted to rotate along the outer wall of the fixed frame 40 with the fifth rotating shaft 41. During the rotation, the torsion spring 42 is twisted and tightened. As the guide rod 38 passes through the limit plate 43, the limit plate 43 is twisted and reset, causing the fifth rotating shaft 41 and the limit plate 43 to rotate and reset. Due to the setting of the limit protrusion 44, the position of the limit plate 43 can be restricted. When the second hydraulic push rod 10 is started to move the lifting frame 12 upward and reset, the guide rod 38 can only slide to the upper right along the lower bend of the track groove 39 into the right straight groove of the track groove 39. At this time, during the upward movement of the guide rod 38 with the fifth transmission gear 35, the fifth transmission gear 35 will not engage with the second transmission rack 36, preventing the detected side of the bearing body 22 from rotating upward during the upward reset process of the fifth transmission gear 35.

[0049] During the process of continuing to move upward and reset the lifting frame 12, the rotating rod 16 and the first transmission gear 15 move upward synchronously, prompting the first transmission gear 15 to engage with the first transmission rack 14, so that the rotating rod 16 rotates accordingly, prompting the first sliding block 19 and the limit block 21 to approach each other. The inclined surfaces of the two limit blocks 21 will clamp the bearing body 22 on the first rotating shaft 24 and the second rotating shaft 25, so that it moves up along the inclined surface and is finally restricted between the inclined surfaces of the two limit blocks 21. At this time, the first hydraulic push rod 3 is started, so that the detection pressing head 8 can continue to perform hardness detection on other curved surface positions of the bearing body 22.

[0050] Example 2: This example is an improvement based on Example 1. For details, please refer to Figure 1 - Figure 10 A hemispherical protrusion 48 is fixedly connected to the inner wall of the track groove 39 .

[0051] In this embodiment: during the downward movement of the guide rod 38 along the track groove 39, the guide rod 38 will slide and contact the surface of the hemispherical protrusion 48. Since the hemispherical protrusion 48 is set to a hemispherical shape, when contacting the hemispherical protrusion 48, the end of the guide rod 38 will slide along the surface of the hemispherical protrusion 48, prompting the guide rod 38 to move in the direction away from the hemispherical protrusion 48. The movement of the guide rod 38 brings the second fixed frame 31 and the second sliding block 30 to move synchronously, and the movement of the second sliding block 30 brings the third rotating shaft 29 to move synchronously. The third rotating shaft 29 will slide a distance along the inner wall of the third transmission gear 27, so that the end of the third rotating shaft 29 will push the bearing body 22 located on the surfaces of the first rotating shaft 24 and the second rotating shaft 25 in the direction away from the third rotating shaft 29 for a distance. This can ensure that the longitudinal position of the bearing body 22 being detected again by the pressing head 8 is different.

[0052] The present invention also discloses a method for testing the hardness of forgings, which comprises the following steps:

[0053] S1. Start the second hydraulic push rod 10 until the bearing body 22 is supported between the two limit blocks 21. At this time, the position of the bearing body 22 is limited.

[0054] S2. Start the first hydraulic push rod 3 to force the detection pressing head 8 to move downward synchronously to perform a pressing test on the surface of the bearing body 22;

[0055] S3. Start the second hydraulic push rod 10 to move its output end downward, exposing the clamped position of the bearing body 22 upward, so that the detection pressing head 8 can continue to perform hardness testing on other curved surface positions of the bearing body 22;

[0056] S4. Start the second hydraulic push rod 10 to move its output end downward, so that the bearing body 22 moves a distance away from the third rotating shaft 29, ensuring that the longitudinal position of the bearing body 22 is different when it is pressed by the pressing head 8 again.

[0057] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hardness testing device for forgings, comprising a workbench (1), a lifting frame (12) and a third fixed frame (37), characterized in that: A third transmission gear (27) is rotatably mounted on the inner wall of the lifting frame (12), and a third rotating shaft (29) is slidably connected to the inner wall of the third transmission gear (27). The third rotating shaft (29) passes through the lifting frame (12), and one end of the third rotating shaft (29) is fixedly connected to a second sliding block (30). The outer wall of the second sliding block (30) is slidably connected to a second fixed frame (31). The outer wall of the second fixed frame (31) is fixedly connected to a fifth transmission gear (35), and one end of the fifth transmission gear (35) is fixedly connected to a guide rod (38). A track groove (39) is provided on the inner wall of the third fixed frame (37), and the guide rod (38) is slidably connected to the inner wall of the track groove (39).

2. A forging hardness testing device according to claim 1, characterized in that: The inner wall of the lifting frame (12) is rotatably connected to a first rotating shaft (24) and a second rotating shaft (25); the outer walls of the first rotating shaft (24) and the second rotating shaft (25) are respectively fixedly connected to a fourth transmission gear (28) and a second transmission gear (26); the fourth transmission gear (28) and the second transmission gear (26) are both meshed and connected with the outer wall of the third transmission gear (27); the first rotating shaft (24) and the second rotating shaft (25) are configured as rubber rods; the first rotating shaft (24) and the second rotating shaft (25) are used to rotate a bearing body (22); the bearing body (22) and the outer walls of the first rotating shaft (24) and the second rotating shaft (25) are in conflict with each other.

3. A forging hardness testing device according to claim 2, characterized in that: The outer wall of the second fixed frame (31) is provided with a sliding groove (32), the inner wall of the sliding groove (32) is fixedly connected to a third guide rod (33), the outer wall of the third guide rod (33) is slidably connected to a second sliding block (30), the outer wall of the second sliding block (30) is fixedly connected to a first return spring (34), and the other end of the first return spring (34) is fixedly connected to the inner wall of the sliding groove (32); The third rotating shaft (29) is configured as a prismatic shaft, and the outer wall of the third rotating shaft (29) is sleeved with a second return spring (49), one end of the second return spring (49) is fixedly connected to the outer wall of the second sliding block (30), and the other end of the second return spring (49) is fixedly connected to a turntable (50), and the turntable (50) is rotatably connected to the outer wall of the lifting frame (12), and the third rotating shaft (29) passes through the turntable (50).

4. A forging hardness testing device according to claim 3, characterized in that: The third fixed frame (37) is fixedly connected to the outer wall of the workbench (1), and the inner wall of the third fixed frame (37) is fixedly connected to a second transmission rack (36), and the second transmission rack (36) and the fifth transmission gear (35) are meshed with each other.

5. A forging hardness testing device according to claim 4, characterized in that: The inner wall of the third fixed frame (37) is fixedly connected to two fixing frames (40), the outer wall of the fixing frame (40) is rotatably connected to a fifth rotating shaft (41), the other end of the fifth rotating shaft (41) is rotatably connected to the inner wall of the track groove (39), the outer wall of the fifth rotating shaft (41) is sleeved with a torsion spring (42), one end of the torsion spring (42) is fixedly connected to the outer wall of the fixing frame (40), the other end of the torsion spring (42) is fixedly connected to a limiting plate (43), the limiting plate (43) is fixedly connected to the outer wall of the fifth rotating shaft (41), the inner wall of the track groove (39) is fixedly connected to a limiting protrusion (44) for limiting the position of the limiting plate (43), and the inner wall of the track groove (39) is fixedly connected to a hemispherical protrusion (48).

6. A forging hardness testing device according to claim 5, characterized in that: The outer wall of the workbench (1) is fixedly connected to a first fixed frame (13), the inner wall of the first fixed frame (13) is fixedly connected to a first transmission rack (14), the outer wall of the first transmission rack (14) is meshedly connected to a first transmission gear (15), and the outer wall of the first transmission gear (15) is fixedly connected to a rotating rod (16).

7. A forging hardness testing device according to claim 6, characterized in that: The outer wall of the rotating rod (16) is provided with a first thread groove (46) and a second thread groove (47), the first thread groove (46) and the second thread groove (47) are thread grooves in opposite directions, the outer walls of the first thread groove (46) and the second thread groove (47) are both threadedly connected with a first sliding block (19), the inner wall of the first sliding block (19) is slidably connected with a second guide rod (17), the two ends of the second guide rod (17) are fixedly connected to the inner wall of the lifting frame (12), and the outer wall of the first sliding block (19) is fixedly connected with a limit block (21) for limiting the position of the bearing body (22).

8. A forging hardness testing device according to claim 7, characterized in that: A second hydraulic push rod (10) is fixedly installed inside the workbench (1), and an output end of the second hydraulic push rod (10) is fixedly connected to the outer wall of the lifting frame (12).

9. A forging hardness testing device according to claim 8, characterized in that: A detection device body (5) is fixedly mounted on the outer wall of the workbench (1), a first hydraulic push rod (3) is fixedly mounted on the outer wall of the detection device body (5), a first guide rod (4) is fixedly connected to the outer wall of the detection device body (5), a lifting plate (7) is fixedly mounted on the output end of the first hydraulic push rod (3), a detection pressing head (8) is fixedly mounted on the outer wall of the lifting plate (7), and the lifting plate (7) is slidably sleeved on the outer wall of the first guide rod (4).

10. A method for testing the hardness of forgings, using the hardness testing device for forgings according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1, start the second hydraulic push rod (10) until the bearing body (22) is supported between the two limit blocks (21), at which time the position of the bearing body (22) is limited; S2, starting the first hydraulic push rod (3), causing the detection pressing head (8) to move downward synchronously to perform a pressing test on the surface of the bearing body (22); S3, starting the second hydraulic push rod (10) to move its output end downward, exposing the clamped position of the bearing body (22) upward, so that the detection pressing head (8) can continue to perform hardness detection on other curved surface positions of the bearing body (22); S4. Start the second hydraulic push rod (10) to move its output end downward, so that the bearing body (22) moves a distance away from the third rotating shaft (29), ensuring that the longitudinal position of the bearing body (22) is different when it is pressed by the pressing head (8) again.

Images