Automobile aluminum alloy material hardness detection device

Abstract

The invention relates to the field of automobile aluminum alloy material detection, in particular to an automobile aluminum alloy material hardness detection device which comprises a base, a Rockwell hardness tester body, an instrument and a pressing head, the Rockwell hardness tester body is installed at the rear end of the upper surface of the base, and the instrument is installed on the front face of the Rockwell hardness tester body. The pressure head is mounted at the detection end of the Rockwell hardness tester main body, the Rockwell hardness tester main body drives the pressure head to descend, the pressure head applies pressure to a to-be-tested workpiece, the material hardness is displayed on the instrument, a screw lifter is mounted at the front end of the upper surface of the base, and a leveling mechanism is mounted at the top end of the screw lifter. Hardness test errors are avoided from two aspects of auxiliary leveling and impurity removal, a guarantee is provided for the accuracy of a detection result, the limitation that traditional detection equipment can only adapt to workpieces in regular shapes is effectively broken through, the application range of the device is greatly widened, and the detection efficiency is improved. And meanwhile, the accuracy and reliability of hardness detection of the irregular automobile aluminum alloy material are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile aluminum alloy material detection, and particularly relates to an automobile aluminum alloy material hardness detection device. BACKGROUND

[0002] In the field of automobile manufacturing, as the mainstream transportation tool, automobiles have strict requirements on the comprehensive performance of materials. Aluminum alloy materials can perfectly meet the multiple core needs of energy saving, performance improvement and safety guarantee in automobile manufacturing due to their outstanding lightweight advantage, excellent structural strength, good corrosion resistance and convenient processing characteristics, and are widely used in various aspects of automobile production.

[0003] In order to ensure that the quality of automobile products meets the manufacturing standards, hardness detection is a crucial quality control link in the processing of aluminum alloy materials, and a Rockwell hardness tester is generally used as the core detection equipment in the industry. The detection principle of the Rockwell hardness tester requires that the indenter and the surface of the aluminum alloy material to be detected are perpendicular to each other. The hardness of the material is determined by the depth of the indentation. However, in actual application, the shapes of automobile aluminum alloy materials are various, and not all of them are regular structures. This leads to a great limitation of the detection range of the traditional Rockwell hardness tester, which can only effectively detect aluminum alloy materials with regular shapes. For irregularly shaped aluminum alloy materials, it is easy to cause poor accuracy of the detection results due to problems such as the indenter and the detection surface being unable to maintain perpendicularity and the detection surface being uneven, which cannot meet the precision requirements of aluminum alloy material hardness detection in the automobile manufacturing process. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide an automobile aluminum alloy material hardness detection device to solve the problem of being unable to detect the hardness of various shaped aluminum alloy materials as described in the background.

[0005] To achieve the above purpose, the embodiment of the present application provides the following technical scheme: An automobile aluminum alloy material hardness detection device, comprising a base, a Rockwell hardness tester main body, an instrument, and an indenter, wherein the Rockwell hardness tester main body is installed at the rear end of the upper surface of the base, the instrument is installed on the front surface of the Rockwell hardness tester main body, and the indenter is installed at the detection end of the Rockwell hardness tester main body. The Rockwell hardness tester main body drives the indenter to descend, the indenter applies pressure to the workpiece to be detected, and the material hardness is displayed on the instrument. A screw lifter is installed at the front end of the upper surface of the base, a leveling mechanism is installed at the top end of the screw lifter, the screw lifter controls the lifting of the leveling mechanism, so that the workpiece reaches the detection height, and a impurity removal mechanism is installed at the top of the right side wall of the Rockwell hardness tester main body. The leveling mechanism comprises a box body mounted at the top end of the screw lifter, a driver mounted at the center of the lower surface of the box body, lifting assemblies vertically mounted at the left and right sides of the upper surface of the box body, the lifting assemblies being capable of adaptive lifting according to the shape of the workpiece to keep the upper surface of the workpiece horizontal, and clamping assemblies mounted at the left and right sides of the bottom of the inner cavity of the box body and driven by the driver, the clamping assemblies playing a positioning role on the lifting assemblies.

[0006] As a further scheme of the present application, the lifting assembly comprises a sleeve vertically mounted on the upper surface of the box body, the inner cavity of the sleeve being slidably connected with a lifting rod, the lifting rod being in the shape of a spline to prevent rotation of the lifting rod during lifting, a spring being sleeved on the outer wall of the lifting rod, and a supporting plate being mounted at the top end of the lifting rod and pushed upward by the elastic force of the spring. The lifting rod and the supporting plate are lifted to adapt to the shape of the workpiece and level the hardness measurement surface of the workpiece.

[0007] As a further scheme of the present application, the clamping assembly comprises an annular seat mounted at the bottom of the inner cavity of the box body, a plurality of sliding blocks being inserted into the outer wall of the annular seat in the circumferential direction, clamping blocks being mounted on the inner side of the sliding blocks, the inner side of the clamping blocks being in the shape of a circular arc to increase the contact area with the lifting rod and thus increase the friction, guide columns being mounted on the outer side of the lower surface of the sliding blocks, an outer gear ring being mounted on the outer wall of the annular seat through a bearing and being rotated by the driver, a plurality of guide grooves being formed in the upper surface of the outer gear ring in the circumferential direction and into which the guide columns are inserted. The guide grooves and the guide columns cooperate to move the clamping blocks inward to position the lifting rod after the height change.

[0008] As a further scheme of the present application, the sliding blocks are in the shape of rectangles, and the center lines of the sliding blocks point to the center of the annular seat.

[0009] As a further scheme of the present application, the plurality of guide grooves are distributed on the outer wall of the outer gear ring in the clockwise direction.

[0010] As a further scheme of the present application, the impurity removing mechanism comprises a mounting bracket mounted at the top of the right side wall of the Rockwell hardness tester body, an outer tube mounted at the right end of the mounting bracket, the outer tube being inclined to the left from top to bottom, an inner tube slidably connected in the inner cavity of the outer tube, a hydraulic oil cylinder mounted on the right side wall of the outer tube to drive the inner tube to slide in the outer tube, and an air suction component mounted at the bottom end of the inner tube. The air suction component not only plays a role of flattening the workpiece, but also can suck away the impurities on the surface of the workpiece.

[0011] As a further scheme of the present application, the air suction component comprises a gas cover mounted at the bottom end of the inner tube, a plurality of air holes being uniformly formed in the lower surface of the gas cover.

[0012] As a further scheme of the present application, the lower surface of the gas cover is horizontally arranged.

[0013] Compared with the prior art, the beneficial effects of the embodiment of the present application are: 1、The hydraulic oil cylinder drives the inner tube to slide along the inclined outer tube downward, drives the horizontally arranged gas cover to be accurately pressed downward to the aluminum alloy material detection area, the horizontal surface of the gas cover assists in calibrating the workpiece posture, and the horizontal degree of the detection surface is further guaranteed; meanwhile, a plurality of air holes on the lower surface of the gas cover can quickly suck off dust, debris and impurities on the surface of the workpiece under the action of the suction force of the fan, so that the adhesion of the pressure head and the detection surface is avoided, the hardness test error is avoided from two aspects of auxiliary leveling and impurity removal, and the accuracy of the detection result is guaranteed.

[0014] 2、The support plate in the lifting assembly can drive the spline-shaped lifting rod to adaptively lift along the sleeve under the combined action of the spring elastic force and the extrusion of the workpiece shape, quickly fit the workpiece shape and level the detection surface; after the lifting rod is adjusted to the adaptive height, the driver drives the outer gear ring to rotate, through the relative movement of the inclined guide groove and the guide column, the rectangular sliding block drives the circular arc clamping block to move inward, tightly locks the lifting rod to fix the height of the support plate, and the posture of the workpiece is stable during the detection. Effectively break through the limitation that the traditional detection equipment can only adapt to regular-shaped workpieces, greatly widen the application range of the device, and significantly improve the accuracy and reliability of the hardness detection of irregular automobile aluminum alloy materials. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of the present application; Figure 2 is a leveling mechanism perspective view of the present application; Figure 3 is an explosion view of the lifting assembly of the present application; Figure 4 is a locking assembly perspective view of the present application; Figure 5 is a Figure 4 enlarged view of A in the present application; Figure 6 is a dust removal mechanism perspective view of the present application; Figure 7 is a gas suction component perspective view of the present application.

[0016] In the figure: 1, base; 2, Rockwell hardness tester main body; 3, instrument; 4, pressure head; 5, screw lifter; 6, leveling mechanism; 7, impurity removal mechanism; 61, box body; 62, driver; 63, lifting assembly; 64, locking assembly; 631, sleeve; 632, lifting rod; 633, spring; 634, support plate; 641, annular seat; 642, sliding block; 643, clamping block; 644, guide column; 645, outer tooth ring; 646, guide groove; 71, mounting frame; 72, outer tube; 73, inner tube; 74, hydraulic oil cylinder; 75, air suction part; 751, air cover; 752, air hole. DETAILED DESCRIPTION

[0017] The technical solutions of the patent will be further described in detail below in combination with specific embodiments.

[0018] Embodiments of the application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the application and cannot be understood as a limitation of the application.

[0019] Please refer to Figures 1-7 In the embodiment of the application, the hardness detection device for aluminum alloy material for automobile includes a base 1, a Rockwell hardness tester main body 2, an instrument 3, and a pressure head 4. The Rockwell hardness tester main body 2 is installed on the upper surface of the rear end of the base 1, the instrument 3 is installed on the front of the Rockwell hardness tester main body 2, and the pressure head 4 is installed on the detection end of the Rockwell hardness tester main body 2. The pressure head 4 is driven to descend by the Rockwell hardness tester main body 2, the pressure head 4 applies pressure to the workpiece to be measured, and the material hardness is displayed on the instrument 3. A screw lifter 5 is installed on the upper surface of the front end of the base 1, a leveling mechanism 6 is installed on the top end of the screw lifter 5, the leveling mechanism 6 is lifted and lowered by controlling the screw lifter 5, so that the workpiece reaches the detection height, and an impurity removal mechanism 7 is installed on the top of the right side wall of the Rockwell hardness tester main body 2.

[0020] The leveling mechanism 6 includes a box body 61 installed on the top end of the screw lifter 5, a driver 62 installed on the center of the lower surface of the box body 61, the driver 62 composed of a motor and a gear as a driving power of the locking assembly 64, lifting assemblies 63 vertically installed on the upper surface of the left and right sides of the box body 61, the lifting assemblies 63 capable of adaptive lifting according to the shape of the workpiece to keep the upper surface of the workpiece horizontal, and locking assemblies 64 installed on the left and right sides of the inner cavity bottom of the box body 61 and driven by the driver 62, the locking assemblies 64 playing a positioning role on the lifting assemblies 63.

[0021] Further, the lifting assembly 63 comprises a sleeve 631 vertically mounted on the upper surface of the box 61, a lifting rod 632 is slidingly connected in the inner cavity of the sleeve 631, the lifting rod 632 is spline-shaped, preventing the lifting rod 632 from rotating during lifting, the outer wall of the lifting rod 632 is sleeved with a spring 633, and a supporting plate 634 is mounted at the top end of the lifting rod 632. The supporting plate 634 is pushed up by the spring 633, leaving a descending space for the aluminum alloy leveling.

[0022] Further, the locking assembly 64 comprises an annular seat 641 mounted at the bottom of the inner cavity of the box 61, a plurality of sliding blocks 642 are inserted into the outer wall of the annular seat 641 in the circumferential direction, the sliding blocks 642 are rectangular in shape, preventing the sliding blocks 642 from rotating, and the center lines of the sliding blocks 642 are directed to the center position of the annular seat 641, ensuring that the sliding blocks 642 drive the clamping blocks 643 to move inward, the clamping blocks 643 are mounted on the inner side of the sliding blocks 642, the inner side of the clamping blocks 643 is arc-shaped, increasing the contact area with the lifting rod 632 and thereby increasing the friction, guide columns 644 are mounted on the lower surface of the sliding blocks 642, the guide columns 644 are cylindrical in shape, the curved surface of the guide columns 644 slides more smoothly in the guide grooves 646, the outer tooth ring 645 is mounted on the outer wall of the annular seat 641 through bearings, the outer tooth ring 645 is driven to rotate by the driver 62, a plurality of guide grooves 646 are formed in the upper surface of the outer tooth ring 645 in the circumferential direction, and the guide columns 644 are inserted into the inner cavities of the guide grooves 646, the plurality of guide grooves 646 are distributed on the outer wall of the outer tooth ring 645 in a clockwise inclination, when the outer tooth ring 645 rotates clockwise or counterclockwise, the inclined surfaces of the guide grooves 646 can extrude the guide columns 644 outward or inward, so that the clamping blocks 643 gradually move away or close to each other; The lifting rod 632 after leveling is stably locked and positioned, ensuring that the workpiece detection surface is continuously horizontal, and providing stable support for accurate hardness detection of irregular aluminum alloy materials.

[0023] In the adaptive leveling stage, the weight of the workpiece acts on the supporting plate 634, and the concave-convex shape of the bottom of the workpiece generates different downward pressures on the two supporting plates 634; under the combined action of the downward pressure and the spring force of the spring 633, the two lifting rods 632 make adaptive lifting movement along the respective sleeves 631; the downward pressure of the convex side of the bottom of the workpiece on the supporting plate 634 is larger, pushing the lifting rod 632 on the corresponding side to compress the spring 633 and slide downward; the downward pressure of the concave side of the bottom of the workpiece on the supporting plate 634 is smaller, and the spring force of the spring 633 on the corresponding side pushes the lifting rod 632 to slide upward; in this process, since the lifting rod 632 is spline-shaped, it can effectively prevent the lifting rod 632 from rotating circumferentially during lifting, ensuring that the supporting plate 634 always maintains a horizontal posture, and finally making the detection surface of the workpiece tend to be horizontal under the cooperative action of the two lifting assemblies 63.

[0024] Locking positioning stage: when the workpiece detection surface is adjusted to a horizontal state, the driver 62 is started, and the driver 62 drives the outer gear ring 645 to rotate clockwise through the gear transmission set; since the guide groove 646 is arranged to be inclined clockwise, when the outer gear ring 645 rotates, the inclined inner wall of the guide groove 646 generates an inward extrusion force on the guide column 644 inserted therein, pushes the guide column 644 to drive the sliding block 642 to move along the radial direction of the annular seat 641 to the center direction; during the movement of the sliding block 642, the arc-shaped clamping block 643 on the inner side thereof synchronously moves to the lifting rod 632, until the inner side wall of the clamping block 643 tightly abuts against the outer wall of the lifting rod 632; since the inner side of the clamping block 643 is an arc-shaped structure, the contact area with the lifting rod 632 is increased, and thus the friction therebetween is improved, the stable locking positioning of the lifting rod 632 is realized, the height of the supporting plate 634 is kept constant, and thus the workpiece detection surface continuously remains in a horizontal state in the subsequent detection process is ensured.

[0025] Unlocking and resetting stage: when the hardness detection is completed, the driver 62 is controlled to drive the outer gear ring 645 to rotate counterclockwise, the inclined inner wall of the guide groove 646 generates an outward extrusion force on the guide column 644, pushes the sliding block 642 to drive the clamping block 643 to move away from the lifting rod 632, and the locking state of the lifting rod 632 is released; at this time, the spring 633 is reset under the action of the elastic force thereof, pushes the lifting rod 632 and the supporting plate 634 to move upward to the initial position, so as to take out the workpiece after the detection is completed, and perform the next detection operation.

[0026] Further, the impurity removal mechanism 7 comprises a mounting frame 71 mounted on the top of the right side wall of the Rockwell hardness tester main body 2, and an outer pipe 72 is mounted at the right end of the mounting frame 71. The outer pipe 72 is inclined to the left from top to bottom, and when the inner pipe 73 slides downward, the inner pipe 73 can move to the position directly below the indenter 4. The inner pipe 73 is slidably connected in the inner cavity of the outer pipe 72, and a dust suction fan is connected to the top of the inner pipe 73, which serves as a power source for removing impurities from the workpiece. A hydraulic oil cylinder 74 is mounted on the right side wall of the outer pipe 72, which drives the inner pipe 73 to slide in the outer pipe 72. An air suction component 75 is mounted at the bottom end of the inner pipe 73.

[0027] Further, the air suction component 75 comprises an air cover 751 mounted at the bottom end of the inner pipe 73, and a plurality of air holes 752 are uniformly arranged around the lower surface of the air cover 751. The air holes 752 provide an air inlet channel, and the impurities on the surface of the workpiece are carried away by the gas.

[0028] Initial state: the hydraulic oil cylinder 74 is in a contracted state, the inner pipe 73 is accommodated in the inner cavity of the outer pipe 72, and the air suction component 75 is in a position avoiding the indenter 4 on the right side of the inner pipe 73, which does not affect the initial leveling action of the workpiece placing and leveling mechanism 6.

[0029] Gas cover displacement and auxiliary leveling: when the leveling mechanism 6 completes the initial self-adaptive leveling of the workpiece, start the hydraulic cylinder 74, and the output end of the hydraulic cylinder 74 extends to drive the inner tube 73 to slide along the inclined outer tube 72 downward. Due to the "inclined from top to bottom to the left" structural design of the outer tube 72, the bottom end of the gas cover 751 gradually moves to the directly below the pressure head 4 during the sliding of the inner tube 73, and finally accurately covers the detection area of the workpiece. At this time, the lower surface of the gas cover 751 is horizontally arranged and is in contact with the workpiece detection surface. By using the rigidity and horizontal characteristics of the gas cover 751, a slight downward pressure is applied to the workpiece to assist the leveling mechanism 6 in further calibrating the levelness of the detection surface, ensuring that the pressure head is perpendicular to the detection surface when it is pressed down.

[0030] Impurity removal operation: after the gas cover 751 is in contact with the workpiece detection surface, start the external dust suction fan. The dust suction fan inputs negative pressure suction force into the gas cover 751 through the inner tube 73. Dust, debris and other impurities on the surface of the workpiece are sucked into the inner cavity of the gas cover 751 through the evenly distributed air holes 752 on the lower surface of the gas cover 751 under the action of negative pressure, and then are drawn out to the external dust collection device (not shown in the figure) along the inner tube 73, realizing the cleaning treatment of the detection surface and avoiding the impurities from causing indentation deformation or not being tightly attached when the pressure head is pressed, thereby avoiding detection errors.

[0031] Reset standby: after the impurity removal is completed, first turn off the dust suction fan, and then control the output end of the hydraulic cylinder 74 to retract, drive the inner tube 73 to slide upward along the outer tube 72, and drive the gas cover 751 to reset to the initial avoiding position, avoiding interfering with the subsequent detection action of the pressure head 4. At this time, the impurity removal mechanism 7 completes the operation and waits for the next detection cycle.

[0032] Working principle: Step one: place the aluminum alloy material on the support plate 634 with the flat side facing up. According to the height of the aluminum alloy material, the screw lifter 5 drives the leveling mechanism 6 to rise, so that the aluminum alloy material reaches the detection height and is ready for detection. Step two: drive the inner tube 73 to slide downward along the outer tube 72 through the hydraulic cylinder 74. Under the inclined state of the outer tube 72, the gas cover 751 gradually moves to the directly below the pressure head 4. The gas cover 751 uses its horizontal surface to press the aluminum alloy material horizontally, and the support plate 634 is always in contact with the aluminum alloy material under the action of the spring 633. At the same time, the aluminum alloy material itself extrudes the support plate 634, and the lifting rod 632 adaptively rises along the sleeve 631 to make the detection surface of the aluminum alloy material level. Step three: the driver 62 drives the outer gear ring 645 to rotate, so that the inclined surface of the guide groove 646 extrudes the guide column 644 inward, and the sliding block 642 drives the clamping block 643 to move inward to lock the lifting rod 632. The height of the support plate 634 is constant, and the detection surface of the aluminum alloy material remains level at this time. Step four, the fan gives the inner tube 73 suction, under the condition of air hole 752 ventilation, the air cover 751 absorbs the dust and other impurities on the surface of the aluminum alloy material, and then the hydraulic cylinder 74 drives the inner tube 73 to return to the initial position, ready for cleaning again; Step five, the Rockwell hardness tester main body 2 makes the pressure head 4 vertically press the aluminum alloy material, and after forming the indentation on the surface of the aluminum alloy material, it retreats back, the Rockwell hardness tester main body 2 measures the hardness of the aluminum alloy according to the indentation depth, and displays it on the instrument 3, so as to realize the hardness test of the automobile aluminum alloy material. The above is only the preferred embodiment of the present application, it should be pointed out that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which should be considered as the protection scope of the present application, which will not affect the effect and practicality of the patent.

Claims

1. A kind of automobile aluminum alloy material hardness detection device, including base (1), Rockwell hardness gauge main body (2), instrument (3), indenter (4), the Rockwell hardness gauge main body (2) is installed on the upper surface rear end of base (1), the instrument (3) is installed in Rockwell hardness gauge main body (2) front, the indenter (4) is installed in Rockwell hardness gauge main body (2) detection end, by Rockwell hardness gauge main body (2) drive indenter (4) drop, indenter (4) to the workpiece to be measured pressurization, and show material hardness on instrument (3), it is characterized in that, The upper surface of the base (1) is provided with a screw lifter (5) at the front end, a leveling mechanism (6) is installed at the top end of the screw lifter (5), the screw lifter (5) is used to control the lifting of the leveling mechanism (6), so that the workpiece reaches the detection height, and the Rockwell hardness tester body (2) is provided with a impurity removal mechanism (7) on the top of the right side wall. The leveling mechanism (6) comprises a box (61) installed at the top end of the screw lifter (5), a drive (62) is installed at the center position of the lower surface of the box (61), lifting assemblies (63) are vertically installed on the upper surface of the box (61) on the left and right sides, the lifting assemblies (63) can adaptively lift according to the shape of the workpiece, so that the upper surface of the workpiece remains horizontal, and dead components (64) are installed on the left and right sides of the inner cavity bottom of the box (61) and are driven by the drive (62).

2. The automobile aluminum alloy material hardness detection device according to claim 1, characterized by, The lifting assembly (63) comprises a sleeve (631) which is vertically installed on the upper surface of the box (61), a lifting rod (632) which is slidably connected in the inner cavity of the sleeve (631), the lifting rod (632) is in the shape of a spline, so that the lifting rod (632) is prevented from rotating during lifting, a spring (633) which is sleeved on the outer wall of the lifting rod (632), and a supporting plate (634) which is installed at the top end of the lifting rod (632) and is pushed upward by the elastic force of the spring (633).

3. The automobile aluminum alloy material hardness detection device according to claim 2, characterized by The dead component (64) comprises a ring seat (641) which is installed in the inner cavity bottom of the box (61), a plurality of sliding blocks (642) which are inserted on the outer wall of the ring seat (641) in the circumferential direction, clamping blocks (643) which are installed on the inner side of the sliding blocks (642), the inner side of the clamping block (643) is in the shape of a circular arc, so that the contact area with the lifting rod (632) is increased, and the friction force is increased, guide columns (644) which are installed on the outer side of the lower surface of the sliding block (642), an outer gear ring (645) which is installed on the outer wall of the ring seat (641) through a bearing, the outer gear ring (645) is rotated by the drive (62), a plurality of guide grooves (646) which are formed in the upper surface of the outer gear ring (645) in the circumferential direction, and the guide column (644) is inserted into the inner cavity of the guide groove (646).

4. The automobile aluminum alloy material hardness detection device according to claim 3, characterized by The sliding block (642) is in the shape of a rectangle, and the center line extension line of the sliding block (642) points to the center position of the ring seat (641).

5. The automobile aluminum alloy material hardness detection device according to claim 4, characterized by A plurality of guide grooves (646) are distributed on the outer wall of the outer gear ring (645) in a clockwise inclined manner.

6. The automobile aluminum alloy material hardness detection device according to claim 5, characterized by The impurity removal mechanism (7) comprises a mounting bracket (71) which is installed on the top of the right side wall of the Rockwell hardness tester body (2), an outer pipe (72) which is installed at the right end of the mounting bracket (71), the outer pipe (72) is inclined to the left from top to bottom, an inner pipe (73) which is slidably connected in the inner cavity of the outer pipe (72), a hydraulic oil cylinder (74) which is installed on the right side wall of the outer pipe (72) and is used to drive the inner pipe (73) to slide in the outer pipe (72), and an air suction component (75) which is installed at the bottom end of the inner pipe (73).

7. The automobile aluminum alloy material hardness detection device according to claim 6, characterized by The air suction component (75) comprises an air cover (751) installed at the bottom end of the inner tube (73), and a plurality of air holes (752) are uniformly arranged around the lower surface of the air cover (751).

8. The automobile aluminum alloy material hardness detection device according to claim 7, characterized by The lower surface of the air cover (751) is horizontally arranged.

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