Normal contact rigidity measuring device for scraping surface of workpiece

Abstract

The invention discloses a normal contact rigidity measuring device for a scraping surface of a workpiece, and relates to the technical field of scraping surface rigidity detection.The normal contact rigidity measuring device comprises a first support, side plates are oppositely and fixedly arranged on the front side and the rear side of the first support, clamping devices are fixedly arranged on the inner sides of the side plates, and leveling and pressure applying detection devices are fixedly arranged above the right sides of the side plates; the leveling pressure applying detection device comprises a second support, synchronous hydraulic cylinders are oppositely and fixedly arranged on the lower end face of the second support, a movable seat is fixedly arranged at the output end of each synchronous hydraulic cylinder and slidably connected with the second support, and a normal adjusting device is fixedly arranged below each movable seat. The rigidity detection device is adjusted through the normal adjusting device, so that the rigidity detection device is kept vertical in the vertical direction, the rigidity detection device can conveniently carry out rigidity detection on the to-be-detected scraping surface in a vertical state, and the accuracy of rigidity detection is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of scraping surface stiffness detection, in particular to a device for measuring the normal contact stiffness of a scraping surface of a workpiece. Background Art

[0002] In the prior art, when testing the stiffness of an object to be tested, bending tests or compression tests are mostly used. For example, pressure is applied to the object to be tested and its deformation is detected to judge the stiffness of the object to be tested. Surface scraping is a precision machining technology used to improve the flatness and finish of metal surfaces. By manually or mechanically scraping, tiny unevenness and flaws on the surface are removed to make the contact surface smoother. The prior art is not perfect in testing the stiffness of scraped surfaces.

[0003] The invention with authorization announcement number CN115031950B discloses a stiffness detection device for overall detection of steel strip pipes. The invention places the steel strip pipe on the side of a test platen, and then moves the steel strip pipe in an L-shaped trajectory to directly below the test platen. The stiffness of the steel strip pipe is detected through the test platen. The device evaluates its stiffness by detecting the force value and the deformation value, which is not intuitive enough. Once the object to be detected is replaced, the device cannot perform stiffness detection. When the object to be detected is a metal plate or a curved plate, the device cannot be applied.

[0004] The above-mentioned device can only achieve the purpose of testing the strength of the steel pipe belt. It is not suitable for testing the stiffness of the scraped surface. Moreover, the device is not equipped with an adjustment mechanism in the vertical direction, and cannot ensure that the test plate can perform normal stiffness testing on the object to be tested, which is prone to detection errors. Therefore, a device is needed that can more accurately adjust the normal direction of the detection part, so as to facilitate more accurate stiffness testing of the scraped surface. Summary of the invention

[0005] The object of the present invention is to provide a device for measuring the normal contact stiffness of a scraped surface of a workpiece, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A device for measuring the normal contact stiffness of a workpiece scraping surface comprises a first bracket, a side plate is relatively fixedly arranged on the front and rear sides of the first bracket, a clamping device is fixedly arranged on the inner side of the side plate, and a leveling pressure detection device is fixedly arranged on the upper right side of the side plate;

[0008] The leveling pressure detection device includes a second bracket, a synchronous hydraulic cylinder is fixedly arranged on the lower end surface of the second bracket, a moving seat is fixedly arranged on the output end of the synchronous hydraulic cylinder and the moving seat is slidably connected to the second bracket, a normal adjustment device is fixedly arranged below the moving seat, a vacuum machine is fixedly arranged on one side of the normal adjustment device and located below the moving seat, an air pressure balance indicating device is fixedly arranged on the other side of the normal adjustment device and located below the moving seat, a first pressure sensor is fixedly arranged below the normal adjustment device, and a stiffness detection device is fixedly arranged below the first pressure sensor.

[0009] As a further solution of the present invention: the clamping device includes a linear guide mechanism, a first fixed seat is arranged on the linear guide mechanism, a first electric push rod is fixedly arranged on the outer side of the first fixed seat, and a clamping plate is fixedly arranged on the end of the output shaft of the first electric push rod.

[0010] As a further solution of the present invention: the normal adjustment device includes a first joint bearing and a third bracket, a normal fixing rod is arranged below the first joint bearing, a six-dimensional force sensor is fixedly arranged at the lower end of the normal fixing rod, a leveling device is arranged below the third bracket, the third bracket is connected to the leveling device through connecting rods located at four corners, the third bracket is connected to the normal fixing rod through an upper centripetal rubber elastic layer, the normal fixing rod is connected to the leveling device through a lower centripetal rubber elastic layer, and a fixing device is arranged on the normal fixing rod on the inner side of the leveling device.

[0011] As a further solution of the present invention: the fixing device includes a first shell, and a second joint bearing is arranged on the normal fixing rod inside the first shell.

[0012] As a further solution of the present invention: the leveling device includes a circular fixed frame, and the four inner walls of the circular fixed frame are respectively fixedly provided with sliding rails, and a second fixed seat is fixedly installed on the sliding rail through a slider, and a second electric push rod is fixedly provided on the second fixed seat, and the end of the output shaft of the second electric push rod is fixedly connected to the side wall of the first shell.

[0013] As a further solution of the present invention: the stiffness detection device includes a second shell, a first rubber seal is fixedly arranged below the second shell, a third electric push rod is fixedly arranged on the inner wall of the second shell, a second pressure sensor is fixedly arranged on the output shaft of the third electric push rod, a pressure head is fixedly arranged below the second pressure sensor, and a first laser distance sensor is fixedly arranged on one side of the third electric push rod on the inner wall of the second shell.

[0014] As a further solution of the present invention: an air pressure sensor is fixedly installed on the inner wall of the second shell on the other side of the third electric push rod, the air pressure balance indicating device includes a collecting pipe, a transparent tube and a fourth laser distance sensor, the second shell is connected to the collecting pipe through a first connecting pipe, a first solenoid valve is arranged on the first connecting pipe, the second shell is connected to the transparent tube through a second connecting pipe, a third solenoid valve is arranged on the second connecting pipe, the collecting pipe is connected to the transparent tube through the third connecting pipe, a second solenoid valve is arranged on the third connecting pipe, a piston is slidably arranged in the transparent tube, a floating plate cooperating with the piston is slidably arranged on the outer side of the transparent tube, and the vacuum machine is connected to the second shell through a vacuum connecting pipe.

[0015] As a further solution of the present invention: openings are provided on both sides of the second shell, two third shells are rotatably installed in the second shell through a sealed rotating shaft, the third shell has an adsorption portion, a second rubber seal is provided below the third shell, an electromagnetic adsorber that cooperates with the adsorption portion is provided between the third shell and the second rubber seal, through holes are respectively provided on the upper end surface of the second shell, a fourth electric push rod is fixedly provided on the through hole, a steering head is fixedly provided on the output shaft of the fourth electric push rod, and the steering head passes through the second shell and the electromagnetic adsorber.

[0016] As a further solution of the present invention: a reset plate is fixedly arranged above the first bracket and below the leveling pressure detection device.

[0017] As a further solution of the present invention: a second laser distance sensor and a third laser distance sensor are respectively disposed on the lower end surface of the second shell and located outside the third shell.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The stiffness detection device is adjusted through the normal adjustment device so that the stiffness detection device remains vertical in the vertical direction, so that the stiffness detection device can perform stiffness detection on the scraped surface to be detected in a vertical state, thereby ensuring the accuracy of the stiffness detection;

[0020] 2. The upper centripetal rubber elastic layer and the lower centripetal rubber elastic layer cooperate to keep the normal fixing rod initially vertical in the vertical direction. The six-dimensional force sensor monitors the normal fixing rod, and the leveling device performs secondary fine-tuning on the normal fixing rod, so that the normal fixing rod is in a completely vertical state, avoiding the offset of the stiffness detection device, thereby ensuring the accuracy of the detection;

[0021] 3. The second housing and the first rubber seal are fitted to the surface of the scraped workpiece to be inspected through the synchronous hydraulic cylinder, so that a sealed space is formed inside the second housing. The first laser distance sensor detects the distance between the first housing and the surface of the scraped workpiece to be inspected. The third electric push rod drives the pressure head to descend. When the second pressure sensor detects the pressure, the third electric push rod stops moving, which is convenient for the subsequent detection of the surface stiffness of the scraped workpiece to be inspected.

[0022] 4. The vacuum machine is connected to the second shell through a vacuum connecting tube, and the moving distance of the floating plate is monitored by the fourth laser distance sensor, which can intuitively reflect the deformation amount of the pressure head when testing the surface stiffness of the scraped workpiece to be tested, thereby improving the accuracy of the stiffness detection device in detecting the surface stiffness of the scraped workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It is a schematic diagram of the top structure of embodiment 1 of the present invention.

[0025] Figure 3 This is a schematic diagram of the main structure of Example 1 of the present invention.

[0026] Figure 4 It is a schematic diagram of the right view structure of Example 1 of the present invention.

[0027] Figure 5 Embodiment 1 of the present invention Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle.

[0028] Figure 6 Embodiment 1 of the present invention Figure 5 Schematic diagram of the local enlarged structure at point C in the middle.

[0029] Figure 7 Embodiment 1 of the present invention Figure 2 Schematic diagram of the cross-sectional structure at BB in the middle.

[0030] Figure 8 It is a schematic diagram of the local three-dimensional structure of the normal adjustment device in Example 1 of the present invention.

[0031] Fig. 9 It is a schematic diagram of the local three-dimensional structure of the leveling device in Example 1 of the present invention.

[0032] Fig.10 It is a partial exploded view of the floating plate in Example 1 of the present invention.

[0033] Fig.11 It is a schematic diagram of the three-dimensional structure of Example 2 of the present invention.

[0034] Fig.12 It is a schematic diagram of the local three-dimensional structure of the stiffness detection device in Example 2 of the present invention.

[0035] Fig.13 This is an exploded view of the stiffness detection device in Example 2 of the present invention.

[0036] Fig.14 It is a schematic cross-sectional structure diagram of embodiment 2 of the present invention.

[0037] Fig.15 Embodiment 2 of the present invention Fig.14 Schematic diagram of the local enlarged structure at point D in the middle.

[0038] 1. First bracket; 2. Side plate; 3. Clamping device; 31. Linear guide mechanism; 32. First fixed seat; 33. First electric push rod; 34. Clamping plate; 4. Leveling pressure detection device; 41. Second bracket; 42. Synchronous hydraulic cylinder; 43. Moving seat; 44. Vacuum machine; 441. Vacuum connecting pipe; 45. Normal adjustment device; 451. First joint bearing; 452. Third bracket; 453. Normal fixing rod; 454. Upper centripetal rubber elastic layer; 455. Connecting rod; 456. Leveling device; 4561. Slide rail; 4562. Second fixed seat; 4563. Second electric push rod; 4564. Round fixing frame; 457. Fixing device; 4571. First shell; 4572. Second joint bearing; 458. Lower centripetal rubber elastic layer; 459. Six-dimensional force sensor; 46. First pressure sensor; 47. Rigid degree detection device; 471, second shell; 472, third electric push rod; 473, second pressure sensor; 474, pressure head; 475, first laser distance sensor; 476, air pressure sensor; 477, first rubber seal; 4701, third shell; 4702, second rubber seal; 4703, adsorption part; 4704, electromagnetic adsorption device; 4705, second laser distance sensor; 4706, fourth electric push rod; 4707, steering head; 4708, third laser distance sensor; 48, air pressure balance indicating device; 481, collecting pipe; 482, first connecting pipe; 483, first electromagnetic valve; 4841, second connecting pipe; 4842, third connecting pipe; 485, second electromagnetic valve; 486, transparent tube; 487, floating plate; 488, third electromagnetic valve; 489, fourth laser distance sensor; 49, reset plate. DETAILED DESCRIPTION

[0039] The following embodiments will be described in detail with reference to the accompanying drawings. In the drawings or descriptions, similar or identical parts use the same reference numerals, and in actual applications, the shape, thickness or height of each component may be enlarged or reduced. The embodiments listed in the present invention are only used to illustrate the present invention and are not used to limit the scope of the present invention. Any obvious modifications or changes made to the present invention do not depart from the spirit and scope of the present invention.

[0040] Example 1

[0041] See also Figure 1-Figure 10 In an embodiment of the present invention, a normal contact stiffness measuring device for a scraped surface of a workpiece includes a first bracket 1, a side plate 2 is relatively fixedly arranged on the front and rear sides of the first bracket 1, a clamping device 3 is fixedly arranged on the inner side of the side plate 2, and a leveling pressure detection device 4 is fixedly arranged on the upper right side of the side plate 2.

[0042] See also Figure 2 The clamping device 3 includes a linear guide mechanism 31, on which a first fixed seat 32 is arranged, a first electric push rod 33 is fixedly arranged on the outer side of the first fixed seat 32, a clamping plate 34 is fixedly arranged on the end of the output shaft of the first electric push rod 33, and the distance between the two clamping plates 34 is adjusted by the first electric push rod 33. The two clamping plates 34 clamp the scraped workpiece to be inspected, and the linear guide mechanism 31 drives the scraped workpiece to be inspected to be fed to the bottom of the leveling and pressure detection device 4.

[0043] See also Figure 3 , Figure 4 The leveling pressure detection device 4 includes a second bracket 41, a synchronous hydraulic cylinder 42 is relatively fixedly arranged on the lower end surface of the second bracket 41, a moving seat 43 is fixedly arranged on the output end of the synchronous hydraulic cylinder 42, and the moving seat 43 is slidably connected to the second bracket 41, a normal adjustment device 45 is fixedly arranged below the moving seat 43, a vacuum machine 44 is fixedly arranged on one side of the normal adjustment device 45 and located below the moving seat 43, a gas pressure balance indicating device 48 is fixedly arranged on the other side of the normal adjustment device 45 and located below the moving seat 43, a first pressure sensor 46 is fixedly arranged below the normal adjustment device 45, and a stiffness detection device 47 is fixedly arranged below the first pressure sensor 46, the stiffness detection device 47 is adjusted by the normal adjustment device 45, so that the stiffness detection device 47 remains vertical in the vertical direction, so that the stiffness detection device 47 can perform stiffness detection on the scraped surface to be detected in a vertical state, thereby ensuring the accuracy of the stiffness detection.

[0044] See also Figure 4 , Figure 5 , Figure 6The normal adjustment device 45 includes a first joint bearing 451 and a third bracket 452. A normal fixing rod 453 is arranged below the first joint bearing 451. A six-dimensional force sensor 459 is fixedly arranged at the lower end of the normal fixing rod 453. A leveling device 456 is arranged below the third bracket 452. The third bracket 452 is connected to the leveling device 456 through connecting rods 455 located at four corners. The third bracket 452 is connected to the normal fixing rod 453 through an upper centripetal rubber elastic layer 454. The normal fixing rod 453 is connected to the lower centripetal rubber elastic layer 458. The fixed rod 453 is connected to the leveling device 456, and a fixing device 457 is arranged on the inner side of the leveling device 456 on the normal fixing rod 453. The upper centripetal rubber elastic layer 454 and the lower centripetal rubber elastic layer 458 cooperate to allow the normal fixing rod 453 to initially maintain verticality in the vertical direction. The six-dimensional force sensor 459 monitors the normal fixing rod 453, and the leveling device 456 performs secondary fine-tuning on the normal fixing rod 453, so that the normal fixing rod 453 is in a completely vertical state, thereby avoiding the offset of the stiffness detection device 47 and ensuring the accuracy of the detection.

[0045] See also Figure 6 , Fig. 9 The fixing device 457 includes a first shell 4571, and a second joint bearing 4572 is arranged on the normal fixing rod 453 on the inner side of the first shell 4571. The leveling device 456 includes a circular fixing frame 4564, and slide rails 4561 are fixedly arranged on the four inner walls of the circular fixing frame 4564 respectively. A second fixing seat 4562 is fixedly installed on the slide rail 4561 through a slider, and a second electric push rod 4563 is fixedly arranged on the second fixing seat 4562, and the output shaft end of the second electric push rod 4563 is fixedly connected to the side wall of the first shell 4571.

[0046] See also Figure 6 , Figure 7The stiffness detection device 47 includes a second shell 471, a first rubber seal 477 is fixedly arranged below the second shell 471, a third electric push rod 472 is fixedly arranged on the inner wall of the second shell 471, a second pressure sensor 473 is fixedly arranged on the output shaft of the third electric push rod 472, a pressure head 474 is fixedly arranged below the second pressure sensor 473, a first laser distance sensor 475 is fixedly arranged on one side of the third electric push rod 472 on the inner wall of the second shell 471, and the other side of the third electric push rod 472 An air pressure sensor 476 is fixedly installed on the inner wall of the second shell 471. The second shell 471 and the first rubber seal 477 are fitted with the surface of the scraped workpiece to be inspected through the synchronous hydraulic cylinder 42, so that a sealed space is formed on the inner side of the second shell 471. The first laser distance sensor 475 detects the distance between the first laser distance sensor 475 and the surface of the scraped workpiece to be inspected. The third electric push rod 472 drives the pressure head 474 to descend. When the second pressure sensor 473 detects the pressure, the third electric push rod 472 stops moving, which facilitates the subsequent detection of the surface stiffness of the scraped workpiece to be inspected.

[0047] See also Figure 8 , Fig.10 The air pressure balance indicating device 48 includes a collecting pipe 481, a transparent pipe 486 and a fourth laser distance sensor 489. The second shell 471 is connected to the collecting pipe 481 through a first connecting pipe 482. The first connecting pipe 482 is provided with a first electromagnetic valve 483. The second shell 471 is connected to the transparent pipe 486 through a second connecting pipe 4841. The second connecting pipe 4841 is provided with a third electromagnetic valve 488. The collecting pipe 481 is connected to the transparent pipe 486 through a third connecting pipe 4842. The third connecting pipe 4842 is provided with a second electromagnetic valve 485. A piston is slidably provided in the transparent pipe 486. A piston cooperating with the piston is slidably provided on the outer side of the transparent pipe 486. The floating plate 487 (the piston and the floating plate 487 are fixedly connected by a short connecting rod and the short connecting rod is slidably connected to the transparent tube 486. A seal is fixedly arranged on the floating plate 487 and the seal seals the sliding groove on the transparent tube 486 to prevent air leakage of the transparent tube 486. The piston and the floating plate 487 can be linked to each other. This technical means is the existing technology and is not described here. The vacuum machine 44 is connected to the second shell 471 through the vacuum connecting pipe 441, and the moving distance of the floating plate 487 is monitored by the fourth laser distance sensor 489. It can intuitively reflect the deformation amount of the pressure head 474 when detecting the surface stiffness of the scraped workpiece to be detected, thereby improving the accuracy of the stiffness detection device 47 in detecting the surface stiffness of the scraped workpiece.

[0048] When the device is used, the scraping workpiece to be detected is placed on the first bracket 1, the first electric push rod 33 is started to clamp the scraping workpiece to be detected, the linear guide mechanism 31 is started, and the scraping workpiece to be detected is driven to move to the bottom of the leveling pressure detection device 4, and the upper centripetal rubber elastic layer 454 and the lower centripetal rubber elastic layer 458 cooperate to make the normal fixing rod 453 initially vertical in the vertical direction, and the six-dimensional force sensor 459 monitors the normal fixing rod 453. When the normal fixing rod 453 still has an angular deviation in the vertical direction, the second electric push rod 4563 is started to level the normal fixing rod 453 and the fixing device 457 A secondary fine adjustment is performed to keep the normal fixing rod 453 vertical in the vertical direction, the first laser distance sensor 475 is started to detect the distance from the surface of the scraped workpiece to be detected, the synchronous hydraulic cylinder 42 is started, and the stiffness detection device 47 is driven to descend to a suitable position. The first rubber seal 477 seals the second shell 471 and pre-applies pressure to the surrounding space to be detected, thereby improving the accuracy of subsequent stiffness detection of the scraped workpiece surface to be detected. The first pressure sensor 46 monitors the pressure on the stiffness detection device 47. When the set value is reached, the synchronous hydraulic cylinder 42 is closed, and the first laser distance sensor 475 is started. The distance to the surface of the scraped workpiece to be inspected is tested for a second time, and then the third electric push rod 472 is started to make the pressure head 474 contact with the surface of the scraped workpiece to be inspected, and the vacuum machine 44 and the first electromagnetic valve 483 are turned on to make the second housing 471 and the collecting pipe 481 in a negative pressure state, and then the vacuum machine 44 and the first electromagnetic valve 483 are turned off, and the second electromagnetic valve 485 and the third electromagnetic valve 488 are turned on. When the pressure on both sides of the transparent tube 486 is the same and the piston therein does not move, the third electromagnetic valve 488 is closed, and then the third electric push rod 472 is started, and the second pressure sensor 473 controls the pressure head 474 to apply pressure. Pressure, if the third electric push rod 472 is displaced, then the third electric push rod 472 is reset to the position before detection to open the third solenoid valve 488, when the piston in the transparent tube 486 is displaced, it proves that the surface stiffness of the scraped workpiece to be detected does not meet the standard; if the third electric push rod 472 is not displaced (a problem of detection accuracy), but the piston in the transparent tube 486 is displaced, it proves that the surface of the scraped workpiece to be detected is still slightly deformed, and the scraped workpiece to be detected is in a barely up-to-standard condition; if the third electric push rod 472 and the piston in the transparent tube 486 are not displaced, it proves that the surface stiffness of the scraped workpiece to be detected meets the standard.

[0049] Example 2

[0050] See also Figure 11-Figure 15On the basis of Example 1, a reset plate 49 is fixedly arranged above the first bracket 1 and below the leveling pressure detection device 4, openings are opened on both sides of the second shell 471, and two third shells 4701 are rotatably installed in the second shell 471 through a sealing shaft, and the third shell 4701 has an adsorption portion 4703, and a second rubber seal 4702 is arranged below the third shell 4701, and an electromagnetic adsorber 4704 cooperating with the adsorption portion 4703 is arranged between the third shell 4701 and the second rubber seal 4702, and through holes are respectively opened on the upper end surface of the second shell 471, and a fourth electric push rod 4706 is fixedly arranged on the through hole, and a steering head 4707 is fixedly arranged on the output shaft of the fourth electric push rod 4706, and the steering head 4707 passes through the second shell 471 and the electromagnetic adsorber 4704, and the lower end surface of the second shell 471 is located at the third shell 47 01 are respectively provided with a second laser distance sensor 4705 and a third laser distance sensor 4708 on the outer side. The first laser distance sensor 475, the second laser distance sensor 4705 and the third laser distance sensor 4708 are used to monitor the distance of the surface of the scraped workpiece to be detected, and determine whether the surface of the scraped workpiece to be detected is a curved surface or a flat surface, so that the first rubber seal 477 on the second shell 471 and the second rubber seal 4702 on the third shell 4701 cooperate to seal. When the surface of the scraped workpiece to be detected is a curved surface, the electromagnetic absorber 4704 is closed to allow the third shell 4701 to fall freely around the rotating shaft, and the synchronous hydraulic cylinder 42 applies pressure to the stiffness detection device 47, and the fourth electric push rod 4706 and the steering head 4707 cooperate to apply secondary pressure to the third shell 4701 to ensure that the stiffness detection device 47 is in a sealed state, so as to facilitate the subsequent stiffness detection of the surface of the scraped workpiece to be detected.

[0051] When the device is in use, when the surface of the scraped workpiece to be detected is a curved surface, the first laser distance sensor 475, the second laser distance sensor 4705 and the third laser distance sensor 4708 monitor the distance to the surface of the scraped workpiece to be detected, the synchronous hydraulic cylinder 42 drives the stiffness detection device 47 to descend to a suitable position, closes the electromagnetic absorber 4704, and makes the third shell 4701 fall freely around the rotating shaft, the first pressure sensor 46 monitors the pressure on the stiffness detection device 47, and when the set value is reached, closes the synchronous hydraulic cylinder 42, and then the fourth electric push rod 4706 and the steering head 4707 cooperate to apply secondary pressure to the third shell 4701 to ensure that the inside of the stiffness detection device 47 is in a sealed state (the vacuum machine 44 and The air pressure sensor 476 can be used to detect air tightness), the first laser distance sensor 475 is started to perform a secondary detection of the distance to the surface of the workpiece to be scraped and ground, and then the third electric push rod 472 is started to allow the pressure head 474 to contact the surface of the workpiece to be scraped and ground, and finally, through the cooperation of the vacuum machine 44 and the air pressure balance indicating device 48, the pressure head 474 is allowed to perform a stiffness detection on the surface of the workpiece to be scraped and ground. After the detection is completed, the synchronous hydraulic cylinder 42 drives the stiffness detection device 47 to continue to descend, and the reset plate 49 opens the two third shells 4701, and the electromagnetic absorber 4704 is started to absorb the absorption part 4703 on the third shell 4701, thereby achieving the purpose of resetting, and then each component returns to its initial state.

[0052] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for measuring the normal contact stiffness of a workpiece scraping surface, comprising a first bracket (1), characterized in that: Side plates (2) are relatively fixedly arranged on the front and rear sides of the first bracket (1), a clamping device (3) is fixedly arranged on the inner side of the side plate (2), and a leveling pressure detection device (4) is fixedly arranged on the upper right side of the side plate (2); The leveling pressure detection device (4) comprises a second bracket (41), a synchronous hydraulic cylinder (42) is fixedly arranged on the lower end surface of the second bracket (41), a movable seat (43) is fixedly arranged on the output end of the synchronous hydraulic cylinder (42), and the movable seat (43) is slidably connected to the second bracket (41), a normal adjustment device (45) is fixedly arranged below the movable seat (43), a vacuum machine (44) is fixedly arranged on one side of the normal adjustment device (45) below the movable seat (43), a gas pressure balance indicating device (48) is fixedly arranged on the other side of the normal adjustment device (45) below the movable seat (43), a first pressure sensor (46) is fixedly arranged below the normal adjustment device (45), and a stiffness detection device (47) is fixedly arranged below the first pressure sensor (46).

2. The device for measuring the normal contact stiffness of a workpiece scraping surface according to claim 1, characterized in that: The clamping device (3) comprises a linear guide mechanism (31), a first fixed seat (32) is arranged on the linear guide mechanism (31), a first electric push rod (33) is fixedly arranged outside the first fixed seat (32), and a clamping plate (34) is fixedly arranged at the end of the output shaft of the first electric push rod (33).

3. The device for measuring the normal contact stiffness of a workpiece scraping surface according to claim 2, characterized in that: The normal adjustment device (45) comprises a first joint bearing (451) and a third bracket (452); a normal fixing rod (453) is arranged below the first joint bearing (451); a six-dimensional force sensor (459) is fixedly arranged at the lower end of the normal fixing rod (453); a leveling device (456) is arranged below the third bracket (452); the third bracket (452) is connected to the leveling device (456) via connecting rods (455) located at four corners; the third bracket (452) is connected to the normal fixing rod (453) via an upper centripetal rubber elastic layer (454); the normal fixing rod (453) is connected to the leveling device (456) via a lower centripetal rubber elastic layer (458); and a fixing device (457) is arranged on the inner side of the leveling device (456) and located on the normal fixing rod (453).

4. The device for measuring the normal contact stiffness of a workpiece scraping surface according to claim 3, characterized in that: The fixing device (457) comprises a first shell (4571), and a second joint bearing (4572) is arranged on the normal fixing rod (453) and located inside the first shell (4571).

5. The device for measuring the normal contact stiffness of a workpiece scraping surface according to claim 3, characterized in that: The leveling device (456) comprises a circular fixed frame (4564), and the four inner walls of the circular fixed frame (4564) are respectively fixedly provided with slide rails (4561), and a second fixed seat (4562) is fixedly installed on the slide rail (4561) through a slider, and a second electric push rod (4563) is fixedly provided on the second fixed seat (4562), and the output shaft end of the second electric push rod (4563) is fixedly connected to the side wall of the first shell (4571).

6. A device for measuring normal contact stiffness of a workpiece scraping surface according to any one of claims 1 to 5, characterized in that: The stiffness detection device (47) comprises a second shell (471), a first rubber seal (477) is fixedly arranged below the second shell (471), a third electric push rod (472) is fixedly arranged on the inner wall of the second shell (471), a second pressure sensor (473) is fixedly arranged on the output shaft of the third electric push rod (472), a pressure head (474) is fixedly arranged below the second pressure sensor (473), and a first laser distance sensor (475) is fixedly arranged on one side of the third electric push rod (472) on the inner wall of the second shell (471).

7. The device for measuring the normal contact stiffness of a workpiece scraping surface according to claim 6, characterized in that: The other side of the third electric push rod (472) is fixedly provided with an air pressure sensor (476) on the inner wall of the second shell (471); the air pressure balance indicating device (48) comprises a collecting pipe (481), a transparent tube (486) and a fourth laser distance sensor (489); the second shell (471) is connected to the collecting pipe (481) via a first connecting pipe (482); a first solenoid valve (483) is provided on the first connecting pipe (482); the second shell (471) is connected to the transparent tube (486) via a second connecting pipe (4841); The transparent tube (486) is connected with the collecting tube (481), the second connecting tube (4841) is provided with a third solenoid valve (488), the collecting tube (481) is connected with the transparent tube (486) through the third connecting tube (4842), the third connecting tube (4842) is provided with a second solenoid valve (485), a piston is slidably provided in the transparent tube (486), a floating plate (487) cooperating with the piston is slidably provided on the outer side of the transparent tube (486), and the vacuum machine (44) is connected with the second shell (471) through the vacuum connecting tube (441).

8. The device for measuring the normal contact stiffness of a workpiece scraping surface according to claim 7, characterized in that: The second shell (471) is provided with openings on both sides. Two third shells (4701) are rotatably installed in the second shell (471) through a sealed rotating shaft. The third shell (4701) is provided with an adsorption portion (4703). A second rubber seal (4702) is provided below the third shell (4701). An electromagnetic adsorber (4704) that cooperates with the adsorption portion (4703) is provided between the third shell (4701) and the second rubber seal (4702). Through holes are respectively provided on the upper end surface of the second shell (471). A fourth electric push rod (4706) is fixedly provided on the through hole. A steering head (4707) is fixedly provided on the output shaft of the fourth electric push rod (4706), and the steering head (4707) passes through the second shell (471) and the electromagnetic adsorber (4704).

9. The device for measuring the normal contact stiffness of a workpiece scraping surface according to claim 8, characterized in that: A reset plate (49) is fixedly arranged above the first bracket (1) and below the leveling pressure detection device (4).

10. The device for measuring the normal contact stiffness of a workpiece scraping surface according to claim 9, characterized in that: The lower end surface of the second shell (471) is located outside the third shell (4701) and is respectively provided with a second laser distance sensor (4705) and a third laser distance sensor (4708).

Images