A kind of casting aluminum alloy hardness testing equipment and testing method

Abstract

The invention discloses a casting aluminum alloy hardness testing device and a testing method thereof, which relate to the technical field of testing equipment, and include a machine base, wherein the top of the machine base is fixedly connected to a support frame, the top of the machine base is fixedly connected to a support frame, and further includes: a rotating disk arranged at the bottom of the support frame, the bottom of the rotating disk is fixedly connected to a rotating rod, the rotating rod extends to the inside of the support frame and is rotatably connected to the support frame, three placement frames are fixedly connected to the top of the rotating disk, and clamping members for fixing workpieces are arranged inside the two placement frames; when the test is completed, the rotating disk rotates, and the workpiece that has been tested rotates together with the placement frame. At this time, under the action of the transmission component, the clamping members on the placement frame are released to fix the workpiece, and the personnel remove the workpiece and put a new workpiece to be tested, so that the workpiece can be tested and replaced at the same time to improve the work efficiency.

Description

Technical Field

[0001] The invention relates to the field of testing equipment, and in particular to a casting aluminum alloy hardness testing equipment and a testing method thereof. Background Art

[0002] In the process of metal material processing and inspection, hardness testing is a key step in evaluating material properties. Alloy forgings, due to their excellent mechanical properties and microstructure after forging process, are widely used in industrial fields requiring high strength and high toughness, such as aerospace, automobile manufacturing, heavy machinery, etc. Hardness testing after forging is essential to ensure product quality and performance.

[0003] A hardness testing device for metal material detection disclosed in the patent application with reference publication number CN112798449B comprises a first fixed column, a bayonet is provided on the side of the first fixed column, a base is fixedly connected to the side of the first fixed column, a distance sensor is electrically connected to the four corners of the top of the base, a microcomputer is electrically connected to the bottom of the distance sensor, a plunger pump is electrically connected to the side of the microcomputer, a signal receiver is electrically connected to the side of the plunger pump, and notches are provided on both sides of the base. The present invention has high measurement accuracy and reliable specimen fixation.

[0004] In the process of testing metal workpieces, the workpiece is squeezed by an upper pressing piece, and the hardness of the workpiece is tested by the indentation on the workpiece surface. Each test requires manual fixing and releasing of the workpiece, which is too cumbersome. In addition, when the moisture in the air is too high, metal is prone to oxidation reaction when it comes into contact with oxygen and water, forming metal oxides, which can easily cause rust on the workpiece surface. When it is necessary to test the hardness of the workpiece, when the location of rust on the workpiece surface is detected, the rust usually causes the metal surface to become rough or loose, resulting in inaccurate test data and the inability to truly detect the hardness of the metal.

[0005] Therefore, it is necessary to provide a cast aluminum alloy hardness testing device and a testing method thereof to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a casting aluminum alloy hardness detection device and a detection method thereof to solve the problems of the defects of the prior art mentioned in the above background technology.

[0007] Based on the above ideas, the present invention provides the following technical solutions: a cast aluminum alloy hardness testing device, comprising a machine base, a support frame is fixedly connected to the top of the machine base, a support frame is fixedly connected to the top of the machine base, and further comprising:

[0008] A rotating disk is arranged at the bottom of the support frame, a rotating rod is fixedly connected to the bottom of the rotating disk, the rotating rod extends into the inside of the support frame and is rotatably connected to the support frame, and three placement frames are fixedly connected to the top of the rotating disk, and clamping members for fixing workpieces are arranged inside the three placement frames;

[0009] A fixed cylinder is rotatably connected to the bottom of the rotating disk, the fixed cylinder is fixedly connected to the support frame through a support plate, and a transmission assembly is provided between the fixed cylinder and the three placement frames for driving the clamping member to clamp the workpiece;

[0010] The fixed cylinder is fixedly connected to a spraying device for spraying rust remover on the workpiece, the bottom of the support frame is fixedly connected to a second electric rod, the telescopic end of the second electric rod is fixedly connected to an extrusion rod, the bottom of the extrusion rod is fixedly connected to an extrusion head for extruding the workpiece, a contact cylinder is sleeved on the outer side of the extrusion head, a cleaning piece for cleaning rust is arranged at the bottom of the contact cylinder, a connecting piece is arranged between the contact cylinder and the extrusion rod, and when the cleaning piece contacts the workpiece, the contact cylinder drives the cleaning piece to rotate through the connecting piece.

[0011] As a further solution of the present invention: the clamping member comprises:

[0012] A bevel gear disk is arranged inside the placement frame, and a fixing rod is fixedly connected to the bottom of the bevel gear disk. The fixing rod passes through the placement frame and the rotating disk in sequence and is rotationally connected to the placement frame and the rotating disk;

[0013] A plurality of screw rods are arranged in an annular manner around the bevel gear disk, the screw rods penetrate the inner wall of the placement frame and are rotatably connected to the placement frame, one end of each of the plurality of screw rods is fixedly connected to a bevel gear, and the bevel gear is meshedly connected to the bevel gear disk;

[0014] A plurality of sliding seats, each of which is sleeved on the outside of the plurality of screw rods and connected to the screw rods through a ball nut pair, and each of which extends to the top of the placement frame, and each of which is slidably connected to an L-shaped fixing frame on the top of the plurality of sliding seats, and the L-shaped fixing frame is connected to the sliding seat through a first threaded rod;

[0015] A clamping head is arranged on one side of the multiple L-shaped fixing frames, and a rack and multiple sliding rods are fixedly connected to one side of the clamping head. The rack and the multiple sliding rods all penetrate the L-shaped fixing frames and are slidably connected to the L-shaped fixing frames. A cross plate is fixedly connected between the rack and one end of the multiple sliding rods, and a first spring is sleeved on the outer side of the multiple sliding rods.

[0016] As a further solution of the present invention: the clamping member further includes:

[0017] An upper pressing slide is slidably connected to the outer side of the L-shaped fixing frame, a second threaded rod is provided on the side of the upper pressing slide close to the clamping head, the second threaded rod penetrates the upper pressing slide and is threadedly connected to the upper pressing slide, a fixed plate is fixedly connected to the bottom of the second threaded rod, a contact plate is provided at the bottom of the fixed plate, a plurality of moving rods are fixedly connected to the top of the contact plate, and the plurality of moving rods all penetrate the fixed plate and are slidably connected to the fixed plate;

[0018] Multiple traction ropes, both ends of which are fixedly connected to the cross plate and the upper pressing slide respectively, a return spring is fixedly connected between the upper pressing slide and the sliding seat, and a guide wheel for guiding the multiple traction ropes is rotatably connected to the outer side of the L-shaped fixing frame;

[0019] An annular plate is fixedly connected to the top of the plurality of moving rods, a third spring is sleeved on the outer side of the plurality of moving rods, a touch switch is fixedly connected to the outer side of the second threaded rod, and the touch switch is touched when the annular plate rises;

[0020] The locking piece is arranged on one side of the L-shaped fixing frame and above the rack, and is used to lock the rack.

[0021] As a further solution of the present invention: the locking member includes a first electric rod fixedly connected to the outside of the L-shaped fixing frame, the telescopic end of the first electric rod is fixedly connected with a block, the block is arranged on the upper part of the rack, and the first electric rod is electrically connected to the touch switch.

[0022] As a further solution of the present invention: the cleaning member comprises:

[0023] A plurality of cleaning scrapers are arranged in a ring around the center of the contact cylinder, the cleaning scrapers penetrate the contact cylinder and are slidably connected to the contact cylinder;

[0024] A limiting rod is fixedly connected to the top of the cleaning scraper, the limiting rod passes through the contact cylinder and is slidably connected to the contact cylinder, a fourth spring is sleeved on the outer side of the limiting rod, and two ends of the fourth spring are respectively fixedly connected to the contact cylinder and the limiting rod.

[0025] As a further solution of the present invention: the connecting piece includes:

[0026] A fixed sleeve is fixedly connected to the outside of the extrusion rod, and a spiral groove is provided on the outside of the fixed sleeve;

[0027] A rotating ring rotatably connected to the outside of the fixed sleeve, a plurality of telescopic rods and a plurality of fifth springs are fixedly connected between the rotating ring and the contact sleeve, and the plurality of fifth springs are sleeved on the outside of the plurality of telescopic rods;

[0028] As a further solution of the present invention: the connecting piece further includes:

[0029] Push rods corresponding to the plurality of cleaning scrapers one by one, wherein one end of the plurality of push rods is rotatably connected to the plurality of cleaning scrapers, and the other end of the plurality of push rods is rotatably connected to the rotating ring;

[0030] A limiting slide block is fixedly connected to the top of the contact cylinder, and the limiting slide block extends to the inside of the spiral groove near the fixed sleeve and is slidably connected to the fixed sleeve.

[0031] As a further solution of the present invention: the transmission assembly comprises:

[0032] Transmission gears respectively fixed to the outer sides of the three fixing rods;

[0033] The arc-shaped rack is fixedly connected to the inside of the fixed cylinder, and when the transmission gear moves to the arc-shaped rack, it meshes with the arc-shaped rack;

[0034] The mounting plate is arranged on the outer side of the rotating rod, the mounting plate is fixedly connected with the fixing tube through the supporting rod, and teeth are arranged on the outer side of the mounting plate, which are meshed and connected with the transmission gear.

[0035] As a further solution of the present invention: a camera is fixedly connected to the bottom of the support frame for photographing the workpiece extruded by the extrusion head.

[0036] A method for detecting the hardness of a cast aluminum alloy is also provided, comprising the following steps:

[0037] Step 1: Place the workpiece on one of the placement frames, rotate the rotating disk, and the transmission assembly at the bottom of the rotating disk drives the clamping member on the placement frame to fix the workpiece;

[0038] Step 2: As the placement frame rotates to below the spraying device, the spraying device sprays the rust remover on the surface of the placement frame;

[0039] Step 3: The rotating disk continues to rotate to move the workpiece to be tested to the bottom of the second electric rod, and the hardness of the workpiece is tested by the extrusion head. Before that, the rust is cleaned by the cleaning piece under the contact cylinder.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. When the test is completed, the rotating disk rotates, and the workpiece that has been tested rotates with the placement frame. At this time, under the action of the transmission component, the clamping parts on the placement frame are released to fix the workpiece. The personnel remove the workpiece and place a new workpiece to be tested. The workpiece can be tested and replaced at the same time, which improves work efficiency.

[0042] 2. When the annular plate contacts the touch switch, the touch switch is turned on. At this time, the first electric rod electrically connected to the touch switch is started, so that the block at the telescopic end of the first electric rod contacts the rack, thereby clamping the rack, so that the clamping head no longer moves, and the clamping head clamps the side of the workpiece, while the top of the workpiece is clamped and fixed by the contact plate, ensuring that the workpiece remains stable during detection, thereby improving the accuracy of detection.

[0043] 3. The limiting slider fixedly connected to the top of the contact cylinder slides inside the spiral groove opened on the outside of the fixed sleeve, so that the contact cylinder rotates together. When the contact cylinder rotates, multiple cleaning scrapers clean the area to be tested and scrape off the rust. As the contact cylinder rises, the pushing rod rotatably connected between the cleaning scraper and the rotating ring takes effect. The pushing rod pushes the cleaning scraper away from the contact cylinder, so that the extrusion head can contact the workpiece and test the workpiece, thereby avoiding the influence of rust on the workpiece, ensuring the accuracy of the test data, and restoring the true hardness value of the workpiece.

[0044] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0046] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0047] Figure 2 It is a schematic diagram of the structure of the rotating disk of the present invention;

[0048] Figure 3 It is a schematic diagram of the placement frame structure of the present invention;

[0049] Figure 4 It is a schematic diagram of the structure of the transmission assembly of the present invention;

[0050] Figure 5 It is a schematic diagram of the cross-sectional structure of the placement frame of the present invention;

[0051] Figure 6 It is a schematic diagram of the structure of the clamping member of the present invention;

[0052] Figure 7 The present invention Figure 6 A schematic diagram of the enlarged structure of part A;

[0053] Figure 8 It is a schematic diagram of the structure of the L-shaped fixing frame of the present invention;

[0054] Fig. 9 The present invention Figure 8 A schematic diagram of the enlarged structure of part B;

[0055] Fig.10 It is a schematic diagram of the structure of the extrusion rod of the present invention;

[0056] Fig.11 It is a schematic diagram of the cross-sectional structure of the contact tube of the present invention;

[0057] Fig.12 It is a schematic diagram of the structure of the cleaning member of the present invention;

[0058] Fig.13 It is a schematic diagram of the structure of the cleaning scraper of the present invention;

[0059] Fig.14 It is a schematic diagram of the structure of the upper pressing slide table of the present invention.

[0060] In the figure: 1, machine base; 101, support frame; 2, support frame; 3, rotating disk; 301, rotating rod; 4, placement frame; 501, bevel gear disk; 502, screw rod; 503, bevel gear; 504, fixing rod; 505, transmission gear; 506, fixing cylinder; 507, arc-shaped rack; 508, mounting disk; 6, sliding seat; 600, L-shaped fixing frame; 601, clamping head; 602, rack; 603, horizontal plate; 604, sliding rod; 605, first spring; 606, first threaded rod; 7, upper pressing slide; 700, contact disk; 701, second threaded rod; 702, fixed plate; 703, moving rod; 704, annular plate; 705, touch switch; 706, third spring; 707, first electric rod; 708, block; 709, traction rope; 8, second electric rod; 800, extrusion head; 801, extrusion rod; 802, contact cylinder; 8021, limiting slider; 8022, cleaning scraper; 8023, limit rod; 8024, fourth spring; 8025, push rod; 803, fixed sleeve; 804, telescopic rod; 805, fifth spring; 806, rotating ring; 9, spraying device; 10, camera. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0062] like Figures 1 to 14 As shown, a casting aluminum alloy hardness detection device and a detection method thereof include the following embodiments: Embodiment 1: As shown Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a base 1, a support frame 2 is fixedly connected to the top of the base 1, a support frame 101 is fixedly connected to the top of the base 1, and a camera 10 is fixedly connected to the bottom of the support frame 2 for photographing the workpiece extruded by the extrusion head 800, and also includes:

[0063] A rotating disk 3 is arranged at the bottom of the support frame 101, a rotating rod 301 is fixedly connected to the bottom of the rotating disk 3, the rotating rod 301 extends into the inside of the support frame 101 and is rotatably connected to the support frame 101, and three placement frames 4 are fixedly connected to the top of the rotating disk 3, and clamping members for fixing workpieces are arranged inside the three placement frames 4;

[0064] A fixed cylinder 506 is rotatably connected to the bottom of the rotating disk 3. The fixed cylinder 506 is fixedly connected to the support frame 101 through a support plate. A transmission assembly is provided between the fixed cylinder 506 and the three placement frames 4 for driving the clamping member to clamp the workpiece.

[0065] The fixed cylinder 506 is fixedly connected to a spraying device 9 for spraying a rust remover on the workpiece, the bottom of the support frame 2 is fixedly connected to a second electric rod 8, the telescopic end of the second electric rod 8 is fixedly connected to an extrusion rod 801, the bottom of the extrusion rod 801 is fixedly connected to an extrusion head 800 for extruding the workpiece, a contact cylinder 802 is sleeved on the outside of the extrusion head 800, a cleaning piece for cleaning rust is arranged at the bottom of the contact cylinder 802, a connecting piece is arranged between the contact cylinder 802 and the extrusion rod 801, and when the cleaning piece contacts the workpiece, the contact cylinder 802 drives the cleaning piece to rotate through the connecting piece.

[0066] During specific implementation, a driving motor is arranged inside the support frame 101, and the output shaft of the driving motor is fixedly connected to the rotating rod 301, and the rotating disk 3 is driven to rotate by the rotating rod 301, and the workpiece is placed on one of the placement frames 4, and the rotating rod 301 drives the rotating disk 3 to rotate, and the clamping member on the placement frame 4 is driven to fix the workpiece through the transmission assembly at the lower part of the rotating disk 3; as the placement frame 4 rotates to the bottom of the spraying device 9, the spraying device 9 sprays the rust remover on the surface of the placement frame 4; the rotating disk 3 continues to rotate to move the workpiece to be inspected to the bottom of the second electric rod 8, and the hardness test of the workpiece is performed on the workpiece through the extrusion head 800. Before this, the rust is cleaned by the cleaning member under the contact cylinder 802. When the test is completed, the rotating disk 3 rotates, and the inspected workpiece rotates together with the placement frame 4. At this time, under the action of the transmission assembly, the clamping member on the placement frame 4 releases the fixation of the workpiece, and the personnel removes the workpiece and puts a new workpiece to be inspected, so that the workpiece can be inspected and replaced at the same time to improve the work efficiency;

[0067] The spraying device 9 can adopt an existing spray head and a storage tank, and spray the rust remover in the storage tank onto the workpiece on the placement frame 4 through the spray head.

[0068] Embodiment 2: Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.14As shown, the clamping member includes: a bevel gear plate 501 arranged inside the placement frame 4, a fixing rod 504 is fixedly connected to the bottom of the bevel gear plate 501, and the fixing rod 504 sequentially penetrates the placement frame 4 and the rotating disk 3 and is rotationally connected to the placement frame 4 and the rotating disk 3;

[0069] A plurality of screw rods 502 are arranged in an annular manner around the bevel gear plate 501, the screw rods 502 penetrate the inner wall of the placement frame 4 and are rotatably connected to the placement frame 4, one end of each of the plurality of screw rods 502 is fixedly connected to a bevel gear 503, and the bevel gear 503 is meshedly connected to the bevel gear plate 501;

[0070] A plurality of sliding seats 6, the plurality of sliding seats 6 are respectively sleeved on the outside of the plurality of screw rods 502 and connected with the screw rods 502 through a ball nut pair, the plurality of sliding seats 6 extend to the top of the placement frame 4, the tops of the plurality of sliding seats 6 are all slidably connected with an L-shaped fixing frame 600, and the L-shaped fixing frame 600 is connected with the sliding seat 6 through a first threaded rod 606;

[0071] A clamping head 601 is arranged on one side of multiple L-shaped fixing frames 600, and a rack 602 and multiple sliding rods 604 are fixedly connected to one side of the clamping head 601. The rack 602 and the multiple sliding rods 604 all penetrate the L-shaped fixing frames 600 and are slidably connected to the L-shaped fixing frames 600. A cross plate 603 is fixedly connected between the rack 602 and one end of the multiple sliding rods 604, and a first spring 605 is sleeved on the outer side of the multiple sliding rods 604.

[0072] In specific implementation, when the rotating disk 3 rotates, it drives the fixedly connected placement frame 4 to rotate together. At this time, the bevel gear disk 501 rotates under the action of the transmission component, and the bevel gear disk 501 drives a plurality of meshing bevel gears 503 to rotate, and the bevel gear 503 drives the screw rod 502 to rotate, so that the sliding seat 6 connected to the outer side of the screw rod 502 through the ball nut pair moves toward the center of the circle, so that the clamping head 601 on the sliding seat 6 contacts the workpiece, thereby clamping and fixing the workpiece in the center, avoiding manual operation, and automatically clamping and locking the workpiece;

[0073] In addition, for workpieces of different shapes, the L-shaped fixing frame 600 is slidably connected to the sliding seat 6, and the first threaded rod 606 passes through the L-shaped fixing frame 600 and is threadedly connected to the L-shaped fixing frame 600. The first threaded rod 606 is rotatably connected to the sliding seat 6. Different batches of workpieces need to be fixed, and the distance between the L-shaped fixing frame 600 and the sliding seat 6 is adjusted by rotating the first threaded rod 606.

[0074] like Figure 7As shown, in this scheme: the clamping member also includes: an upper pressing slide 7 slidably connected to the outer side of the L-shaped fixing frame 600, a second threaded rod 701 is provided on the upper pressing slide 7 near the clamping head 601, the second threaded rod 701 penetrates the upper pressing slide 7 and is threadedly connected to the upper pressing slide 7, a fixed plate 702 is fixedly connected to the bottom of the second threaded rod 701, a contact plate 700 is provided at the bottom of the fixed plate 702, a plurality of moving rods 703 are fixedly connected to the top of the contact plate 700, and the plurality of moving rods 703 all penetrate the fixed plate 702 and are slidably connected to the fixed plate 702;

[0075] Multiple traction ropes 709, both ends of which are fixedly connected to the horizontal plate 603 and the upper pressing slide 7, respectively; a return spring is fixedly connected between the upper pressing slide 7 and the sliding seat 6; and a guide wheel for guiding the multiple traction ropes 709 is rotatably connected to the outer side of the L-shaped fixing frame 600;

[0076] An annular plate 704 is fixedly connected to the top of the plurality of movable rods 703, and a third spring 706 is sleeved on the outer side of the plurality of movable rods 703. A touch switch 705 is fixedly connected to the outer side of the second threaded rod 701, and the touch switch 705 is touched when the annular plate 704 rises; a locking member is arranged on one side of the L-shaped fixing frame 600 and above the rack 602, and is used to lock the rack 602.

[0077] The locking member includes a first electric rod 707 fixedly connected to the outside of the L-shaped fixing frame 600. The telescopic end of the first electric rod 707 is fixedly connected with a block 708. The block 708 is arranged on the upper part of the rack 602. The first electric rod 707 is electrically connected to the touch switch 705.

[0078] In specific implementation, when the existing clamping parts lock and clamp the workpiece, they often only fix the four sides of the workpiece. When performing a hardness test, when the workpiece is pressed down, it will inevitably cause the four sides of the workpiece to warp, which will inevitably cause errors in the detection. Therefore, in this solution, when the clamping head 601 contacts the workpiece with the movement of the sliding seat 6, the clamping head 601 moves toward the L-shaped fixed frame 600, and the horizontal plate 603 fixedly connected between the rack 602 and the sliding rod 604 pulls the upper pressing slide 7 down through the traction rope 709. When the upper pressing slide 7 descends, it drives the second threaded rod 701 on the outside to descend together, and the contact plate 700 at the bottom of the second threaded rod 701 contacts the top. As the upper pressing slide 7 continues to descend, the contact plate 700 drives the moving rod 703 and the annular plate 704 fixedly connected to the top of the moving rod 703 to rise. When the annular plate 704 contacts the touch switch 705, the touch switch 705 is turned on. At this time, the first electric rod 707 electrically connected to the touch switch 705 is started, so that the block 708 at the telescopic end of the first electric rod 707 contacts the rack 602, thereby clamping the rack 602, so that the clamping head 601 no longer moves, and the clamping head 601 clamps the side of the workpiece, while the top of the workpiece is clamped and fixed by the contact plate 700, ensuring that the workpiece remains stable during detection, thereby improving the accuracy of detection.

[0079] like Figure 4 As shown, in this embodiment, the transmission assembly includes: transmission gears 505 respectively fixed to the outside of three fixing rods 504;

[0080] The arc-shaped rack 507 is fixedly connected to the interior of the fixed cylinder 506. When the transmission gear 505 moves to the arc-shaped rack 507, it meshes with the arc-shaped rack 507;

[0081] The mounting plate 508 is arranged on the outside of the rotating rod 301 , and is fixedly connected to the fixing tube 506 via a supporting rod. The mounting plate 508 is provided with teeth on the outside thereof, and is meshedly connected with the transmission gear 505 .

[0082] In specific implementation, when the placement frame 4 moves to the arc-shaped rack 507 set on the inner side of the fixed cylinder 506, the transmission gear 505 rotates, and the transmission gear 505 drives the fixed rod 504 to rotate, so that the clamping part on the placement frame 4 clamps the workpiece. When the placement frame 4 is at the teeth of the mounting plate 508, it drives the fixed rod 504 to rotate in the opposite direction to release the fixation of the workpiece.

[0083] Embodiment 3: Fig.10 , Fig.11 , Fig.12 and Fig.13 As shown, the cleaning member includes: a cleaning scraper 8022 arranged in an annular shape around the center of the contact cylinder 802, the cleaning scraper 8022 penetrates the contact cylinder 802 and is slidably connected to the contact cylinder 802;

[0084] A limiting rod 8023 is fixedly connected to the top of the cleaning scraper 8022, the limiting rod 8023 passes through the contact cylinder 802 and is slidably connected to the contact cylinder 802, a fourth spring 8024 is sleeved on the outer side of the limiting rod 8023, and both ends of the fourth spring 8024 are fixedly connected to the contact cylinder 802 and the limiting rod 8023 respectively.

[0085] The connecting member includes: a fixed sleeve 803 fixedly connected to the outer side of the extrusion rod 801, and a spiral groove is formed on the outer side of the fixed sleeve 803;

[0086] A rotating ring 806 is rotatably connected to the outside of the fixed sleeve 803, and a plurality of telescopic rods 804 and a plurality of fifth springs 805 are fixedly connected between the rotating ring 806 and the contact cylinder 802, and the plurality of fifth springs 805 are sleeved on the outside of the plurality of telescopic rods 804;

[0087] The connecting member further includes: push rods 8025 corresponding to the plurality of cleaning scrapers 8022 one by one, and one end of the plurality of push rods 8025 is rotatably connected to the plurality of cleaning scrapers 8022, and the other end of the plurality of push rods 8025 is rotatably connected to the rotating ring 806;

[0088] The limiting slider 8021 is fixedly connected to the top of the contact cylinder 802 . The limiting slider 8021 extends to the inside of the spiral groove near the fixed sleeve 803 and is slidably connected to the fixed sleeve 803 .

[0089] In specific implementation, the workpiece is placed in a warehouse before detection. When the moisture in the air is too high, an oxidation reaction will easily occur when the metal contacts with oxygen and water, forming metal oxides, namely rust, which will easily cause rust on the surface of the workpiece. When the hardness of the workpiece needs to be detected, when the position of the rust on the surface of the workpiece is detected, since rust usually causes the metal surface to become rough or loose, this may cause the value obtained when the hardness test is performed at the rust position to be low. Therefore, in this solution, after the spraying device 9 sprays the rust remover on the workpiece on the placement frame 4, when the workpiece moves to the bottom of the second electric rod 8, the extrusion rod 801 is pushed down by the telescopic end of the second electric rod 8, and the extrusion rod 801 drives the extrusion head 800 at the bottom to descend. At this time, the contact cylinder 802 on the outside of the extrusion head 800 first contacts the workpiece, and after the multiple cleaning scrapers 8022 at the bottom of the contact cylinder 802 contact the workpiece, due to the contact cylinder 802 and the rotating ring 806 The fifth spring 805 and the telescopic rod 804 are fixedly connected, and then the extrusion rod 801 continues to descend, and the cleaning scraper 8022 at the bottom of the contact cylinder 802 keeps in contact with the workpiece. When the contact cylinder 802 rises, the limiting slider 8021 fixedly connected to the top of the contact cylinder 802 slides inside the spiral groove provided on the outer side of the fixed sleeve 803, so that the contact cylinder 802 rotates together. When the contact cylinder 802 rotates, multiple cleaning scrapers 8022 clean the inspection site and scrape off the rust. As the contact cylinder 802 rises, the pushing rod 8025 rotatably connected between the cleaning scraper 8022 and the rotating ring 806 takes effect, and the pushing rod 8025 pushes the cleaning scraper 8022 away from the contact cylinder 802, so that the extrusion head 800 can contact with the workpiece and test the workpiece, thereby avoiding the influence of rust on the workpiece, ensuring the accuracy of the detection data, and restoring the true hardness value of the workpiece.

[0090] When the cleaning scraper 8022 is away from the contact cylinder 802, the cleaning scraper 8022 can also support the periphery of the workpiece test area to ensure its stability.

[0091] When the later stage extrusion head 800 detection is completed, the extrusion rod 801 rises, at which time the contact cylinder 802 descends, and the cleaning scraper 8022 is reset under the action of the fourth spring 8024 outside the limiting rod 8023.

[0092] Working principle: the rotating disk 3 is driven to rotate by the rotating rod 301, and the workpiece is placed on one of the placement frames 4. The rotating rod 301 drives the rotating disk 3 to rotate, and the clamping piece on the placement frame 4 is driven by the transmission component at the bottom of the rotating disk 3 to fix the workpiece; as the placement frame 4 rotates to the bottom of the spraying device 9, the spraying device 9 sprays the rust remover on the surface of the placement frame 4; the rotating disk 3 continues to rotate to move the workpiece to be tested to the bottom of the second electric rod 8, and the hardness of the workpiece is tested by the extrusion head 800. Before this, the rust is cleaned by the cleaning piece under the contact cylinder 802. When the test is completed, the rotating disk 3 rotates, and the workpiece that has been tested rotates together with the placement frame 4. At this time, under the action of the transmission component, the clamping piece on the placement frame 4 releases the fixation of the workpiece, and the personnel places the next workpiece.

[0093] A method for detecting the hardness of a cast aluminum alloy is also provided, comprising the following steps:

[0094] Step 1: Place the workpiece on one of the placement frames 4, rotate the rotating disk 3, and drive the transmission assembly at the bottom of the rotating disk 3 to fix the workpiece on the clamping member on the placement frame 4;

[0095] Step 2: As the placement frame 4 rotates to below the spraying device 9, the spraying device 9 sprays the rust remover on the surface of the placement frame 4;

[0096] Step 3: The rotating disk 3 continues to rotate to move the workpiece to be tested to the bottom of the second electric rod 8 , and the hardness of the workpiece is tested by the extrusion head 800 . Prior to this, the rust is cleaned by the cleaning piece under the contact cylinder 802 .

[0097] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0098] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0099] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cast aluminum alloy hardness testing device, comprising a machine base (1), wherein a support frame (2) is fixedly connected to the top of the machine base (1), and a support frame (101) is fixedly connected to the top of the machine base (1), characterized in that: Also includes: A rotating disk (3) is arranged at the bottom of the support frame (101), a rotating rod (301) is fixedly connected to the bottom of the rotating disk (3), the rotating rod (301) extends into the interior of the support frame (101) and is rotatably connected to the support frame (101), and three placement frames (4) are fixedly connected to the top of the rotating disk (3), and clamping members for fixing workpieces are arranged inside the three placement frames (4); A fixed cylinder (506) is rotatably connected to the bottom of the rotating disk (3); the fixed cylinder (506) is fixedly connected to the support frame (101) via a support plate; a transmission assembly is provided between the fixed cylinder (506) and the three placement frames (4) for driving a clamping member to clamp a workpiece; when the test is completed, the rotating disk (3) rotates, and the workpiece that has been tested rotates together with the placement frame (4); at this time, under the action of the transmission assembly, the clamping member on the placement frame (4) releases the workpiece from being fixed; The fixed cylinder (506) is fixedly connected to a spraying device (9) for spraying a rust remover on a workpiece; the bottom of the support frame (2) is fixedly connected to a second electric rod (8); the telescopic end of the second electric rod (8) is fixedly connected to an extrusion rod (801); the bottom of the extrusion rod (801) is fixedly connected to an extrusion head (800) for extruding the workpiece; a contact cylinder (802) is sleeved on the outside of the extrusion head (800); a cleaning piece for cleaning rust is arranged at the bottom of the contact cylinder (802); a connecting piece is arranged between the contact cylinder (802) and the extrusion rod (801); when the cleaning piece contacts the workpiece, the contact cylinder (802) drives the cleaning piece to rotate via the connecting piece.

2. The casting aluminum alloy hardness testing device according to claim 1 is characterized in that: The clamping member comprises: A bevel gear disc (501) is arranged inside the placement frame (4), a fixing rod (504) is fixedly connected to the bottom of the bevel gear disc (501), and the fixing rod (504) sequentially penetrates the placement frame (4) and the rotating disc (3) and is rotationally connected to the placement frame (4) and the rotating disc (3); A plurality of screw rods (502) are arranged in an annular manner around the bevel gear disk (501), the screw rods (502) penetrate the inner wall of the placement frame (4) and are rotatably connected to the placement frame (4), one end of each of the plurality of screw rods (502) is fixedly connected to a bevel gear (503), and the bevel gear (503) is meshingly connected to the bevel gear disk (501); A plurality of sliding seats (6), the plurality of sliding seats (6) are respectively sleeved on the outside of the plurality of screw rods (502) and connected to the screw rods (502) via a ball nut pair, the plurality of sliding seats (6) extend to the top of the placement frame (4), the tops of the plurality of sliding seats (6) are all slidably connected to an L-shaped fixing frame (600), and the L-shaped fixing frame (600) and the sliding seat (6) are connected via a first threaded rod (606); A clamping head (601) is arranged on one side of the plurality of L-shaped fixing frames (600); a rack (602) and a plurality of sliding rods (604) are fixedly connected to one side of the clamping head (601); the rack (602) and the plurality of sliding rods (604) all penetrate the L-shaped fixing frames (600) and are slidably connected to the L-shaped fixing frames (600); a horizontal plate (603) is fixedly connected between the rack (602) and one end of the plurality of sliding rods (604); and a first spring (605) is sleeved on the outer side of the plurality of sliding rods (604).

3. The casting aluminum alloy hardness testing device according to claim 2 is characterized in that: The clamping member also includes: An upper pressing slide (7) is slidably connected to the outer side of the L-shaped fixed frame (600), a second threaded rod (701) is provided on the upper pressing slide (7) near the clamping head (601), the second threaded rod (701) penetrates the upper pressing slide (7) and is threadedly connected to the upper pressing slide (7), a fixed plate (702) is fixedly connected at the bottom of the second threaded rod (701), a contact plate (700) is provided at the bottom of the fixed plate (702), a plurality of moving rods (703) are fixedly connected at the top of the contact plate (700), and the plurality of moving rods (703) all penetrate the fixed plate (702) and are slidably connected to the fixed plate (702); A plurality of traction ropes (709), the two ends of the plurality of traction ropes (709) being fixedly connected to the horizontal plate (603) and the upper pressing slide (7), respectively; a return spring being fixedly connected between the upper pressing slide (7) and the sliding seat (6); and a guide wheel for guiding the plurality of traction ropes (709) being rotatably connected to the outer side of the L-shaped fixing frame (600); An annular plate (704) is fixedly connected to the top of the plurality of movable rods (703); a third spring (706) is sleeved on the outer sides of the plurality of movable rods (703); a light touch switch (705) is fixedly connected to the outer side of the second threaded rod (701); and the light touch switch (705) is touched when the annular plate (704) rises; A locking member is arranged on one side of the L-shaped fixing frame (600) and above the rack (602), and is used to lock the rack (602).

4. The casting aluminum alloy hardness testing device according to claim 3 is characterized in that: The locking member comprises a first electric rod (707) fixedly connected to the outside of the L-shaped fixing frame (600); a clamping block (708) is fixedly connected to the telescopic end of the first electric rod (707); the clamping block (708) is arranged on the upper part of the rack (602); and the first electric rod (707) is electrically connected to the touch switch (705).

5. The casting aluminum alloy hardness testing device according to claim 1 is characterized in that: The cleaning member comprises: A cleaning scraper (8022) is arranged in a ring shape around the center of the contact cylinder (802), the cleaning scraper (8022) penetrates the contact cylinder (802) and is slidably connected to the contact cylinder (802); A limit rod (8023) is fixedly connected to the top of the cleaning scraper (8022); the limit rod (8023) passes through the contact cylinder (802) and is slidably connected to the contact cylinder (802); a fourth spring (8024) is sleeved on the outer side of the limit rod (8023); and two ends of the fourth spring (8024) are respectively fixedly connected to the contact cylinder (802) and the limit rod (8023).

6. The casting aluminum alloy hardness testing device according to claim 5 is characterized in that: The connecting piece comprises: A fixed sleeve (803) fixedly connected to the outside of the extrusion rod (801), wherein a spiral groove is formed on the outside of the fixed sleeve (803); A rotating ring (806) is rotatably connected to the outside of the fixed sleeve (803); a plurality of telescopic rods (804) and a plurality of fifth springs (805) are fixedly connected between the rotating ring (806) and the contact cylinder (802); and the plurality of fifth springs (805) are sleeved on the outside of the plurality of telescopic rods (804).

7. The casting aluminum alloy hardness testing device according to claim 6 is characterized in that: The connecting piece also includes: Push rods (8025) corresponding one to one with the plurality of cleaning scrapers (8022), one end of the plurality of push rods (8025) being rotatably connected to the plurality of cleaning scrapers (8022), and the other end of the plurality of push rods (8025) being rotatably connected to the rotating ring (806); A limiting slider (8021) is fixedly connected to the top of the contact cylinder (802), and the limiting slider (8021) extends to the inside of the spiral groove near a side of the fixed sleeve (803) and is slidably connected to the fixed sleeve (803).

8. The casting aluminum alloy hardness testing device according to claim 1 is characterized in that: The transmission assembly comprises: Transmission gears (505) respectively fixed to the outsides of the three fixing rods (504); An arc-shaped rack (507) fixedly connected to the interior of the fixed cylinder (506), when the transmission gear (505) moves to the arc-shaped rack (507), it meshes and connects with the arc-shaped rack (507); A mounting plate (508) is arranged outside the rotating rod (301), the mounting plate (508) is fixedly connected to the fixing cylinder (506) via a supporting rod, and teeth are arranged on the outside of the mounting plate (508) to mesh with the transmission gear (505).

9. The casting aluminum alloy hardness testing device according to claim 1, characterized in that: A camera (10) is fixedly connected to the bottom of the support frame (2) and is used to photograph the workpiece extruded by the extrusion head (800).

10. A method for testing the hardness of a cast aluminum alloy, applicable to a cast aluminum alloy hardness testing device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Place the workpiece on one of the placement frames (4), rotate the rotating disk (3), and use the transmission assembly at the bottom of the rotating disk (3) to fix the workpiece to the clamping member on the placement frame (4); Step 2: As the placement frame (4) rotates to below the spraying device (9), the spraying device (9) sprays the rust remover on the surface of the placement frame (4); Step 3: The rotating disk (3) continues to rotate to move the workpiece to be tested to the bottom of the second electric rod (8), and the hardness of the workpiece is tested by the extrusion head (800). Prior to this, the rust is cleaned by the cleaning piece under the contact cylinder (802).

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