Metal profile forming hardness testing equipment

Abstract

The invention discloses metal profile forming hardness testing equipment, and relates to the related technical field of metal hardness testing, the metal profile forming hardness testing equipment comprises a machine body, a lifting mechanism and a measuring pressure head are arranged on the machine body, a testing platform is arranged on the lifting mechanism, the metal profile forming hardness testing equipment further comprises a plurality of supporting rods, and the supporting rods are arranged on the measuring platform in a sliding mode in the sliding direction. A first elastic piece is arranged between each supporting rod and the measuring platform; based on the extrusion effect of the metal profile, the multiple supporting rods form a structure adaptive to the appearance of the metal profile; and the locking mechanism is used for locking the positions of the multiple supporting rods after the multiple supporting rods form the structure adaptive to the appearance of the metal profile.

Description

Technical Field

[0001] The present invention relates to the technical field related to metal hardness testing, in particular to a metal profile forming hardness testing device. Background Art

[0002] As is known to all, metal profile hardness testing is an important means of material testing, usually performed using a hardness tester. Its principle is based on the characteristic of surface deformation of the material after being subjected to force. The hardness value is determined by measuring the depth or area of the indenter pressed into the metal surface under a certain load. Its main purpose is to evaluate material properties and maintain product consistency.

[0003] However, in the prior art, for the hardness test of metal profiles, it is necessary to ensure that the position of the metal profile is stable during the process of the measuring indenter pressing into the surface of the metal profile. Therefore, a fixture for clamping and fixing the metal profile to be tested will be set on the relevant hardness measuring equipment. For example, the patent with announcement number CN221303059U and announcement date of July 9, 2024, entitled "New Composite Metal Material Hardness Testing Device", belongs to the field of hardness testing devices, especially new composite metal material hardness testing devices. In view of the problem that the existing testing devices cannot be placed stably according to the size of the parts, resulting in insufficient stability during the testing process, the following solution is proposed, which includes a body, a base is fixedly provided on the top of the table of the body above the through hole; a lifting mechanism, the lifting mechanism is arranged on the body and is used to adjust the height of the test material; a clamping assembly, the clamping assembly is arranged on the lifting mechanism and is used to fix and clamp the test material; a linkage mechanism, the linkage mechanism is arranged on the clamping assembly and is used to drive the clamping assembly to perform clamping operations. Through the coordination between the linkage mechanism and the clamping assembly, the parts can be placed more stably according to their size, which makes the detection accuracy higher and the adaptability stronger. It avoids the problem of dot position deviation due to the curvature of the part surface and ensures the detection effect.

[0004] Since it is necessary to perform multi-point hardness testing on metal profiles, and it is also necessary to ensure that the position where the hardness test of the special-shaped metal profile is performed can maintain vertical contact with the measuring pressure head to reduce the test error, the shortcomings of the above-mentioned prior art are that, since the direction of the force applied by the measuring pressure head to the metal profile is basically perpendicular to the direction of the force applied by the clamp, it is difficult to maintain complete planar contact between the special-shaped metal profile and the plane on which it is placed. Similarly, it is also difficult for the surface of the clamp used to clamp the special-shaped metal profile to maintain complete planar contact with the special-shaped metal profile. In this way, when the special-shaped metal profile is subjected to the force of the measuring pressure head, the position will change. Therefore, the clamp provided by the above-mentioned prior art is obviously difficult to achieve the purpose of stably clamping the special-shaped metal profile. Summary of the Invention

[0005] The purpose of the present invention is to provide a metal profile forming hardness testing device to solve the technical problems in the related art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A metal profile forming hardness testing device includes a body, a lifting mechanism and a measuring pressure head are provided on the body, a testing platform is provided on the lifting mechanism, and also includes support rods, which are slidably arranged on the measuring platform, and a first elastic member is provided between each support rod and the measuring platform in the sliding direction; based on the extrusion effect of the metal profile, the multiple support rods form a structure that adapts to the shape of the metal profile; a locking mechanism, after the multiple support rods form the structure that adapts to the shape of the metal profile, the locking mechanism locks the positions of the multiple support rods.

[0008] As mentioned above, the end of the support rod in contact with the metal profile is a spherical structure, and there is a rigid contact between the two.

[0009] As mentioned above, the coverage area of the plurality of support rods on the measuring platform is larger than the coverage area of the metal profile to be measured.

[0010] As mentioned above, the locking mechanism includes a disc body rotatably arranged in the measuring platform, and a plurality of through holes are provided on the disc body, and the plurality of through holes correspond one to one with a plurality of support rods, and a locking block is installed in each through hole, and a plurality of locking grooves are provided on each support rod along the sliding direction. After the plurality of support rods form a structure that adapts to the shape of the metal profile, the rotation of the disc body drives the locking block to be inserted into the locking groove at the corresponding position.

[0011] As mentioned above, the two locking grooves at adjacent positions are in a W-shaped structure, and the locking block is in a V-shaped structure.

[0012] As mentioned above, the lifting mechanism includes a first shaft connected to the measuring platform and a base arranged on the machine body, the base is provided with a first ring body screwed to the first shaft, the measuring platform is slidably arranged on the machine body along the direction in which the measuring pressure head presses into the metal profile, and the base is provided with a rotating handwheel. Based on the rotation of the rotating handwheel, the first shaft and the first ring body undergo axial relative movement while performing relative rotation.

[0013] As mentioned above, the first shaft is provided with a first slide along the axial direction, a second shaft is provided axially inside the first shaft, the second shaft is rotatably arranged inside the first shaft, and a second elastic member is provided between the second shaft and the measuring platform, the second shaft is fixedly connected to the disc body, a second slide is provided axially on the second shaft, and a shift block is provided for sliding in the second slide; the rotating handwheel has two positions on the base: in the first position, the rotating handwheel rotates to push the second shaft to rotate through the shift block, and the disc body drives the locking block to insert into the locking groove at the corresponding position; in the second position, the shift block is fixed, the rotating handwheel drives the first ring body to rotate, and the second shaft drives the measuring platform to gradually approach the measuring pressure head.

[0014] As mentioned above, the width of the first slideway is greater than the width of the second slideway.

[0015] As mentioned above, a second ring body is installed on the shift block, and a third elastic member is provided between the second ring body and the base. The second ring body has two positions on the base: in the first position, the rotating hand wheel pushes the second shaft to rotate through the shift block, and the second ring body is driven to rotate by the shift block; in the second position, the rotation of the second ring body on the base is restricted, and the shift block and the rotating hand wheel rotate relative to each other.

[0016] As mentioned above, a fourth elastic member is provided between the rotating hand wheel and the base. After the metal profile is pressed into the measuring pressure head, the rotating hand wheel returns to the first position based on the rebound force of the fourth elastic member.

[0017] The beneficial effect of the present invention is that: by slidingly arranging multiple support rods on the measuring platform, depending on the changes in the external structural characteristics, the extrusion distances of the multiple support rods at different positions of the metal profile to be measured are different. The multiple support rods cooperate with their respective corresponding first elastic parts to achieve adaptive support for the metal profile according to its external structural characteristics, and then the position of each support rod is locked by a locking mechanism, which can ensure that the position of the metal profile to be measured is in vertical contact with the measuring pressure head while also providing stable support. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a metal profile forming hardness testing device provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic cross-sectional structural diagram of a metal profile forming hardness testing device provided in an embodiment of the present invention when the rotating hand wheel is in a first position;

[0021] Figure 3 This is a schematic cross-sectional structural diagram of a metal profile forming hardness testing device provided in an embodiment of the present invention when the rotating hand wheel is in the second position;

[0022] Figure 4 for Figure 2 A in the figure shows the enlarged structural diagram;

[0023] Figure 5 for Figure 3 A schematic diagram of the structure at point B in FIG.

[0024] Figure 6 This is a schematic diagram of an exploded structure from a first perspective of a metal profile forming hardness testing device provided in an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the exploded structure from a second perspective of a metal profile forming hardness testing device provided in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1. Machine body; 2. Measuring pressure head; 3. Measuring platform; 4. Lifting mechanism; 40. First shaft; 41. Base; 42. First ring body; 43. Rotating handwheel; 44. Slide groove; 45. Slide rod; 5. Support rod; 6. First elastic member; 7. Locking mechanism; 70. Disc body; 71. Locking block; 72. Locking groove; 73. First slideway; 74. Second slideway; 75. Shift block; 76. Second elastic member; 77. Second ring body; 78. Third elastic member; 79. Fourth elastic member; 80. Second shaft; 9. First plug-in; 10. First connecting member; 11. Second plug-in; 12. Second connecting member; 13. Third plug-in; 14. Third connecting member. DETAILED DESCRIPTION

[0028] In order to make those skilled in the art better understand the technical solution of the present invention, Figure 1 To the attached Figure 7 The present invention is further described in detail.

[0029] An embodiment of the present invention provides a metal profile forming hardness testing device, including a body 1, on which a lifting mechanism 4 and a measuring pressure head 2 are provided, and the lifting mechanism 4 is provided with a test platform. It also includes support rods 5, which are slidably arranged on the measuring platform 3, and in the sliding direction, a first elastic member 6 is also provided between each support rod 5 and the measuring platform 3; based on the extrusion effect of the metal profile, the multiple support rods 5 form a structure that adapts to the shape of the metal profile; a locking mechanism 7, after the multiple support rods 5 form a structure that adapts to the shape of the metal profile, the locking mechanism 7 locks the positions of the multiple support rods 5.

[0030] Specifically, the equipment for performing hardness testing on metal profiles is a hardness tester, which includes a body 1. A measuring platform 3 is provided on the body 1 for placing the metal profile to be tested. The measuring platform 3 is a circular platform structure. The measuring platform 3 can move back and forth under the drive of a lifting mechanism 4 (this is a prior art and will not be described in detail). Generally, it moves vertically. The body 1 is further provided with a measuring pressure head 2 on the moving path of the measuring platform 3 driven by the lifting mechanism 4. The lifting mechanism 4 drives the measuring platform 3 to gradually approach the measuring pressure head 2. After the surface of the metal profile contacts the measuring pressure head 2 vertically, the lifting mechanism 4 continues to apply force to the measuring platform 3. Then, under a certain load, the measuring pressure head 2 will be pressed into the metal surface to a certain depth. Then the hardness value of the metal profile can be determined by the depth or area of the pressing. In the prior art, the clamp provided for clamping the metal profile to be tested is, when in use, difficult to maintain complete planar contact between the special-shaped metal profile and the plane on which it is placed, because the direction of the force applied by the measuring pressure head 2 to the metal profile is basically perpendicular to the direction of the force applied by the clamp, and the special-shaped metal profile is difficult to maintain complete planar contact with the plane on which it is placed. Similarly, it is also difficult for the surface of the clamp used to clamp the special-shaped metal profile to maintain complete planar contact with the special-shaped metal profile. When the special-shaped metal profile is subjected to the force of the measuring pressure head 2, the position of the special-shaped metal profile will change, which may cause the metal profile hardness test to be unable to proceed smoothly or cause the measurement result to have too large an error.

[0031] Based on the above technical problems, when performing hardness testing on special-shaped metal profiles, a structure that can adaptively support the profile according to the structural characteristics of the metal is required. That is, in this embodiment, multiple support rods 5 are evenly arranged on the measuring platform 3, and each support rod 5 is slidably connected to the measuring platform 3 in the vertical direction, and a first elastic member 6 is also provided between each support rod 5 and the measuring platform 3 in the sliding direction. Based on the elastic force of the first elastic member 6, multiple support rods 5 tend to extend vertically upward from the measuring platform 3. Therefore, when the special-shaped metal profile to be tested is placed on the measuring platform 3, the position where the metal profile needs to be in vertical contact with the measuring pressure head 2 is first determined, and then the position of the metal profile is adjusted so that the position to be tested remains basically perpendicular to the measuring pressure head 2, and then the metal profile is pressed down. Since each part of the special-shaped metal profile has a different pressing distance for the multiple support rods 5, the first elastic member is used in conjunction with the first elastic member. 6, multiple support rods 5 can form an adaptive elastic support for the metal profile, and then the locking mechanism 7 is used to lock the position of each support rod 5. Then, the support rod 5 cannot change its position on the measuring platform 3 again under the action of external force, wherein the locking mechanism 7 can be a bolt, that is, a fixing groove for the bolt to pass through is opened in each support rod 5, and the length direction of the fixing groove is parallel to the axial direction of the support rod 5. When the position of the support rod 5 needs to be fixed, the bolt is moved to the position where the measuring platform 3 is abutted, and then the bolt is tightened to achieve the position restriction of the support rod 5, or a nut is screwed on each support rod 5. When the position of the support rod needs to be fixed, the nut is screwed until it abuts against the measuring platform 3, which can also achieve the fixation of the position of the support rod 5. The above two methods for fixing the position of the support rod 5 are both existing technologies, and will not be described in detail here, and are not specifically shown in the accompanying drawings.

[0032] The beneficial effect of this embodiment is that: by slidingly arranging multiple support rods 5 on the measuring platform 3, depending on the changes in the external structural characteristics, the extrusion distances of the multiple support rods 5 at different positions of the metal profile to be measured are different. The multiple support rods 5 cooperate with their respective corresponding first elastic members 6 to achieve adaptive support for the metal profile according to its external structural characteristics, and then the position of each support rod 5 is locked by the locking mechanism 7, which can ensure that the position of the metal profile to be measured is in vertical contact with the measuring pressure head 2 while also providing stable support.

[0033] Preferably, the end of the support rod 5 in contact with the metal profile is a spherical structure, and there is a hard contact between the two; specifically, when the metal profile to be measured for hardness contacts the measuring platform 3, the contact area between the measuring platform 3 and the metal profile is large, and the measuring pressure head 2 is a conical structure. In this way, when the measuring pressure head 2 is pressed into the metal profile, the measuring platform 3 basically does not cause plastic deformation to the metal profile. In this embodiment, multiple support rods 5 are arranged on the measuring platform 3, which is equivalent to dispersing the contact area between the measuring platform 3 and the metal profile. Under the same force, the contact area between the support rod 5 and the metal profile is small, which is more likely to cause plastic deformation of the metal profile. Therefore, in this embodiment, The end surface of the support rod 5 in contact with the metal profile is arranged into a spherical structure. The spherical structure can adapt to changes in the structure of the metal profile. That is, whether the part of the metal profile that contacts the support rod 5 is a horizontal plane or an inclined plane with an angle less than 90 degrees to the horizontal plane, the support rod 5 can support the metal profile. Compared with the conical structure of the measuring pressure head 2, the spherical surface is less likely to cause large plastic deformation of the metal profile. After the position of the support rod 5 is locked, there is a hard contact between the support rod 5 and the metal profile. This can avoid, to a certain extent, a large position change between the support rod 5 and the metal profile when the measuring pressure head 2 is pressed into the metal profile, thereby reducing the measurement error.

[0034] Preferably, the coverage area of the multiple support rods 5 on the measuring platform 3 is larger than the coverage area of the metal profile to be measured; specifically, when supporting the metal profile, the part of the support rods 5 that is in contact with the metal profile provides stable support for it in the vertical direction, while the remaining part of the support rods 5 that is not in contact with the metal profile is equivalent to surrounding the metal profile on the outside. In this way, when the metal profile is pressed by the measuring pressure head 2 and moves laterally, the metal profile can be hindered to prevent the metal profile from falling out of the range of the measuring platform 3.

[0035] Furthermore, the locking mechanism 7 includes a disc body 70 rotatably arranged in the measuring platform 3, and a plurality of through holes are provided on the disc body 70, and the plurality of through holes correspond one-to-one to the plurality of support rods 5, and a locking block 71 is installed in each through hole, and a plurality of locking grooves 72 are provided on each support rod 5 along the sliding direction. After the plurality of support rods 5 form a structure that adapts to the shape of the metal profile, the rotation of the disc body 70 drives the locking block 71 to be inserted into the locking groove 72 at the corresponding position.

[0036] Specifically, in the aforementioned embodiment, the position of the support rod 5 is restricted by fixing it with bolts. However, when performing hardness testing on metal profiles, multi-point measurement is required, that is, the position of the metal profile on the measuring platform 3 needs to be adjusted. Using bolts to fix the position of the support rod 5 will obviously reduce the measurement efficiency.

[0037] When the locking cam 71 is in the closed position, the locking cam 71 is in the closed position, and the locking cam 71 is in the closed position, so that the locking cam 71 is locked. If locking sill 75 is positioned between locking sill 77 and locking sill 72, the position of support rod 5 remains unchanged, and locking sill 77 is in the state of being grasped by bolt.

[0038] Preferably, the lifting mechanism 4 includes a first shaft rod 40 connected to the measuring platform 3 and a base 41 arranged on the machine body 1, and a first ring body 42 is provided on the base 41 and is screwed to the first shaft rod 40. The measuring platform 3 is slidably arranged on the machine body 1 along the direction in which the measuring pressure head 2 is pressed into the metal profile. A rotating handwheel 43 is provided on the base 41. Based on the rotation of the rotating handwheel 43, the first shaft rod 40 and the first ring body 42 undergo axial relative movement while performing relative rotation.

[0039] Specifically, a slide groove 44 is vertically opened on the machine body 1, and a slide rod 45 is slidably provided in the slide groove 44. The measuring platform 3 is fixed on the slide rod 45, and the base 41 is fixed to the position directly below the measuring pressure head 2 with bolts. Then the first shaft rod 40 is rotatably connected to the base 41, and a first ring body 42 is provided on the base 41. The first ring body 42 is screwed to the first shaft rod 40, and then the first ring body 42 and the first shaft rod 40 can be rotated relative to each other by rotating the rotating handwheel 43. That is, at this time, the first ring body 42 can be fixedly set on the base 41, the first shaft rod 40 is rotatably connected to the measuring platform 3, and the rotating handwheel 43 drives the first shaft rod 40 to rotate, so as to drive the measuring platform 3 gradually approaching or moving away from the measuring pressure head 2. The first shaft rod 40 can also be fixedly connected to the measuring platform 3, and the first ring body 42 is rotatably set on the base 41. Rotating the handwheel 43 drives the first ring body 42 to rotate, so that the first shaft rod 40 drives the measuring platform 3 gradually approaching or moving away from the measuring pressure head 2.

[0040] Furthermore, the first shaft 40 is provided with a first slide 73 along the axial direction, and a second shaft 80 is provided axially inside the first shaft 40. The second shaft 80 is rotatably arranged inside the first shaft 40, and a second elastic member 76 is provided between the second shaft 80 and the measuring platform 3. The second shaft 80 is fixed to the disc body 70, and a second slide 74 is provided axially on the second shaft 80. A shift block 75 is provided for sliding inside the second slide 74; the rotating handwheel 43 has two positions on the base 41: in the first position, the rotating handwheel 43 rotates to push the second shaft 80 to rotate through the shift block 75, and the disc body 70 drives the locking block 71 to insert into the locking groove 72 at the corresponding position; in the second position, the shift block 75 is fixed, the rotating handwheel 43 drives the first ring body 42 to rotate, and the second shaft 80 drives the measuring platform 3 to gradually approach the measuring pressure head 2.

[0041] Specifically, after the measuring indenter 2 is pressed into the metal profile to the required depth, the force needs to be unloaded in time to avoid the measuring indenter 2 being subjected to force for a long time, resulting in slight deformation and affecting the accuracy of subsequent tests. In the unloading process, the force cannot be unloaded suddenly and quickly. If the force is unloaded suddenly, it may cause abnormal changes in the indentation on the surface of the metal profile, such as cracks on the edge of the indentation or irregular in shape of the indentation, which will affect the accurate measurement of the hardness value. Moreover, for the mechanical components of the hardness tester, smooth unloading can reduce mechanical shock and extend the life of the equipment.

[0042] Therefore, in this embodiment, the first shaft 40 is rotatably connected to the measuring platform 3, the first ring body 42 is rotatably connected to the base 41, and the shift block 75 slidingly arranged in the second slide 74 radially passes through the first slide 73, that is, the shift block 75 and the second slide 74 can also be in sliding contact. The rotating hand wheel 43 has two positions on the base 41. In the first position, the rotating hand wheel 43 needs to drive the shift block 75 to rotate. The rotation of the shift block 75 will not move along the length direction of the second slide 74, but will push the second shaft 80 to rotate along the circumferential direction. The rotation of the second shaft 80 will drive the disc body 70 to rotate, so that The locking block 71 is plugged into the locking groove 72 to limit the position of the support rod 5. During this process, the second elastic member 76 will gradually accumulate force. In the second position, the rotary hand wheel 43 is pressed down, so that the connection between the rotary hand wheel 43 and the shift block 75 is disconnected. That is, the rotation of the rotary hand wheel 43 in this position will not drive the shift block 75 to rotate together. At this time, the rotation of the rotary hand wheel 43 will drive the first ring body 42 to rotate, and at the same time the first shaft 40 cannot rotate. In this way, the first ring body 42 and the first shaft 40 can rotate relative to each other, and the position of the second shaft 80 also needs to be restricted. Therefore, in the preferred embodiment , a second ring body 77 is installed on the shift block 75, and a third elastic member 78 is provided between the second ring body 77 and the base 41. The second ring body 77 can slide vertically or rotate circumferentially on the base 41. The second ring body 77 has two positions on the base 41: in the first position, the rotating hand wheel 43 drives the second shaft 80 to rotate through the shift block 75, and the second ring body 77 is driven to rotate by the shift block 75; in the second position, the rotation of the second ring body 77 on the base 41 is restricted, and the shift block 75 and the rotating hand wheel 43 rotate relative to each other, that is, when the rotating hand wheel 43 rotates in the first position, the second ring body 77 is on the base 41 The selector 75 is in the first position and its rotation is not restricted. At this time, relative rotation cannot occur between the selector block 75 and the rotating handwheel 43, which is equivalent to the rotation of the selector block 75 on the rotating handwheel 43 being restricted. When the rotating handwheel 43 rotates in the second position, the second ring body 77 is in the second position on the base 41, and its rotation is restricted. At this time, the rotation of the selector block 75 on the rotating handwheel 43 is not restricted, and the rotating handwheel 43 is connected to the second ring body 77. The same restriction structure can be used for the position restriction of the second ring body 77 on the base 41 and the position restriction of the selector block 75 on the rotating handwheel 43.

[0043] That is, a first plug-in 9 is provided on the shift block 75, a first connector 10 is provided on the rotating hand wheel 43, and a plurality of positions for the first plug-in 9 to be plugged in on the first connector 10 are evenly arranged in the circumferential direction. After the first plug-in 9 and the first connector 10 are plugged in, the shift block 75 and the rotating hand wheel 43 cannot rotate relative to each other, a second plug-in 11 is provided on the second ring body 77, a second connector 12 is provided on the base 41, and a plurality of positions for the second plug-in 11 to be plugged in on the second connector 12 are also evenly arranged on the base 41. A third plug-in 13 is also provided on the rotating hand wheel 43. A third connector 14 is arranged on the second ring body 77, and the third connector 14 is also arranged with multiple positions for the third plug-in 13 to be plugged in in the circumferential direction. In another preferred embodiment, a fourth elastic member 79 is provided between the rotating handwheel 43 and the base 41. After the metal profile is pressed into the measuring pressure head 2, based on the rebound force of the fourth elastic member 79, the rotating handwheel 43 returns to the first position, that is, when the rotating handwheel 43 moves from the first position on the base 41 to the second position, the fourth elastic member 79 undergoes elastic deformation to elastically store force, and the rotating handwheel The movement of 43 will also drive the second ring body 77 to move downward together, that is, the position of the second ring body 77 on the base 41 moves from the first position to the second position, and the third elastic member 78 also undergoes elastic deformation to elastically store force. The rotation of the shift block 75 is restricted by the plug-in connection between the second plug-in 11 and the second connector 12, and the rotation of the first shaft 40 and the second shaft 80 is also restricted. Then the third plug-in 13 is plugged into the third connector 14, and the rotation of the rotating handwheel 43 will drive the first ring body 42 and the first shaft 40 to rotate relative to each other, so as to drive the measuring platform 3 to gradually rotate. Gradually approach the measuring pressure head 2, wherein when the rotating hand wheel 43 is in the first position, the shift block 75 needs to push the second shaft 80 to rotate, and the first shaft 40 does not need to rotate. If the first shaft 40 and the first ring body 42 rotate relative to each other, the position of the measuring platform 3 will change. Therefore, in an optional embodiment, the width of the first slide 73 is greater than the width of the second slide 74, that is, the shift block 75 pushes the second shaft 80 to rotate in the direction in which it has not yet contacted the first shaft 40, and then the first shaft 40 and the first ring body 42 are difficult to rotate relative to each other.

[0044] After the hardness measurement of the metal profile is completed, the downward pressure on the rotating handwheel 43 is removed. Under the action of the rebound force of the fourth elastic member 79, the rotating handwheel 43 returns to the first position from the second position. Under the action of the rebound force of the third elastic member 78, the second ring body 77 returns to the first position from the second position, and the rotation restriction of the push block disappears. Under the action of the rebound force of the second elastic member 76, the second shaft rod 80 rotates, driving the locking block 71 to disengage from the locking groove 72, and the position restriction of each support rod 5 disappears. However, at this time, the extrusion effect of the measuring pressure head 2 on the metal profile is still there, and the elastic force of multiple first elastic members 6 resists and buffers the extrusion force of the metal profile exerted by the measuring pressure head 2. Then, the rotating handwheel 43 is pressed down to move from the first position to the second position again, and then the rotating handwheel 43 is rotated to make the first ring body 42 and the first shaft rod 40 rotate relative to each other, driving the measuring platform 3 to gradually move away from the measuring pressure head 2. During this process, the interaction force between the measuring pressure head 2 and the metal profile slowly disappears.

[0045] The above descriptions of certain exemplary embodiments of the present invention are provided by way of illustration only. It is understood that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the present invention.

Claims

1. A metal profile forming hardness testing device, comprising a body, a lifting mechanism and a measuring pressure head provided on the body, a testing platform provided on the lifting mechanism, characterized in that: Also includes: A plurality of support rods are slidably arranged on the measuring platform, and a first elastic member is provided between each support rod and the measuring platform in the sliding direction; based on the extrusion effect of the metal profile, the plurality of support rods form a structure that adapts to the shape of the metal profile; The locking mechanism locks the positions of the multiple support rods after the multiple support rods form a structure that adapts to the shape of the metal profile.

2. The metal profile forming hardness testing equipment according to claim 1, characterized in that: The end of the support rod in contact with the metal profile is a spherical structure, and there is a hard contact between the two.

3. The metal profile forming hardness testing equipment according to claim 1, characterized in that: The coverage area of the plurality of support rods on the measuring platform is larger than the coverage area of the metal profile to be measured.

4. The metal profile forming hardness testing equipment according to claim 1, characterized in that: The locking mechanism includes a disc body that is rotatably arranged in the measuring platform. The disc body is provided with multiple through holes, and the multiple through holes correspond one-to-one to multiple support rods. A locking block is installed in each through hole, and each support rod is provided with a plurality of locking grooves along the sliding direction. After the multiple support rods form a structure that adapts to the shape of the metal profile, the rotation of the disc body drives the locking block to insert into the locking groove at the corresponding position.

5. The metal profile forming hardness testing device according to claim 4, characterized in that: The two locking grooves at adjacent positions are in a W-shaped structure, and the locking block is in a V-shaped structure.

6. The metal profile forming hardness testing device according to claim 4, characterized in that: The lifting mechanism includes a first shaft connected to the measuring platform and a base arranged on the machine body. The base is provided with a first ring body screwed to the first shaft rod. The measuring platform is slidably arranged on the machine body along the direction in which the measuring pressure head presses into the metal profile. A rotating handwheel is provided on the base. Based on the rotation of the rotating handwheel, the first shaft rod and the first ring body undergo axial relative movement while performing relative rotation.

7. The metal profile forming hardness testing device according to claim 6, characterized in that: The first shaft is provided with a first slideway along the axial direction, a second shaft is provided inside the first shaft along the axial direction, the second shaft is rotatably arranged inside the first shaft, a second elastic member is provided between the second shaft and the measuring platform, the second shaft is fixedly connected to the disc body, a second slideway is provided on the second shaft along the axial direction, a shift block is provided in the second slideway for sliding; the rotating hand wheel has two positions on the base: In the first position, the hand wheel is rotated to drive the second shaft to rotate through the shift block, and the disc body drives the locking block to insert into the locking groove at the corresponding position; In the second position, the position of the shift block is fixed, the rotating hand wheel drives the first ring body to rotate, and the second shaft drives the measuring platform to gradually approach the measuring pressure head.

8. The metal profile forming hardness testing device according to claim 7, characterized in that: The width of the first slideway is greater than the width of the second slideway.

9. The metal profile forming hardness testing device according to claim 7, characterized in that: A second ring body is installed on the shift block, and a third elastic member is provided between the second ring body and the base. The second ring body has two positions on the base: in the first position, the rotating hand wheel pushes the second shaft to rotate through the shift block, and the second ring body is driven to rotate by the shift block; in the second position, the rotation of the second ring body on the base is restricted, and the shift block and the rotating hand wheel rotate relative to each other.

10. The metal profile forming hardness testing device according to claim 9, characterized in that: A fourth elastic member is provided between the rotating hand wheel and the base. After the metal profile is pressed into the measuring pressure head, the rotating hand wheel returns to the first position based on the rebound force of the fourth elastic member.

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