Hardness detection device

Abstract

The utility model belongs to the technical field of detection equipment, and particularly relates to a hardness detection device which comprises an operation table, a detection assembly and a limiting assembly, the detection assembly comprises a supporting frame, a lifting driving piece and a detection piece, the bottom of the supporting frame is fixed on a supporting face, the fixed end of the lifting driving piece is connected to the supporting frame, and the limiting assembly is arranged on the detection piece. The detection piece is used for detecting the workpiece placed on the detection position; the limiting assembly comprises a lower limiting part, a buffering part and an upper limiting part. When the upper limit is in contact with the buffer piece in the descending process, the speed is reduced under the buffer action of the buffer piece, and the impact force generated when the contact of the detection piece is in contact with the workpiece is reduced; the position of the upper limit can be limited by the contact of the upper limit and the lower limit, so that the position of the detection piece is limited, and the damage to the workpiece and the detection piece due to collision between the detection piece and the workpiece when the lifting driving piece has control deviation is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection equipment, and specifically relates to a hardness detection device. Background Art

[0002] The hardness testing tool is a device for testing the hardness of metal workpieces. Hardness is a comprehensive indicator of mechanical properties such as material elasticity, plasticity, strength and toughness. The hardness of the metal determines the quality of the product and whether it can be qualified and meet industrial requirements. Therefore, after the workpiece is processed, its hardness needs to be tested to ensure the quality of the finished product.

[0003] At present, hardness testing is divided into two types: destructive testing and non-destructive testing. Destructive testing not only causes damage to the workpiece, but also makes it difficult to test complex workpieces that are difficult to sample. Non-destructive testing is based on the close relationship between the physical properties of the material and its hardness. Generally speaking, the hardness of the material is related to its microstructure, composition, and heat treatment state. Non-destructive testing also requires the contact of the test piece to contact the surface of the workpiece. During the testing process, the displacement between the test piece and the workpiece is difficult to control. Inaccurate displacement will also cause damage to the workpiece surface. In addition, the detection contact of the test piece will also be damaged. Summary of the invention

[0004] The utility model aims to provide a hardness testing device to solve the problems existing in the prior art of the existing hardness testing process, such as damage to the testing workpiece, low testing accuracy, difficulty in controlling the displacement of the testing piece, and easy damage to the contact of the testing piece.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0006] The utility model proposes a hardness detection device, which comprises:

[0007] An operating table, on which a supporting table surface is formed, and a detection position is formed on the supporting table surface;

[0008] A detection component, comprising a support frame, a lifting drive member and a detection member, wherein the bottom of the support frame is fixed on the support table, the fixed end of the lifting drive member is connected to the support frame, the detection member is connected to the lifting end of the lifting drive member, and the detection member is located directly above the detection position and is used to detect a workpiece placed on the detection position;

[0009] The limit assembly includes a lower limit arranged on the support table, a buffer and an upper limit connected to the lifting end of the lifting drive member. The upper limit rises and falls with the lifting end to approach or move away from the lower limit.

[0010] In some embodiments of the present application, the height of the lower limit is adjustable, and when the upper limit is in contact with the lower limit, the detection member contacts the workpiece to perform hardness detection on the workpiece.

[0011] In some embodiments of the present application, a threaded hole is formed on the operating table, and the bottom of the lower limit is connected to the threaded hole through a screw.

[0012] In some embodiments of the present application, the maximum height of the buffer is greater than the height of the lower limit, the buffer is a hydraulic buffer, and the buffer is configured to reduce the descending speed of the lifting end after the upper limit drops to contact the buffer.

[0013] In some embodiments of the present application, a guide member is also formed on the support frame, the lifting end of the lifting drive member is connected to a mobile base, the detection member and the upper limit are both fixed on the mobile base, and a guide rail portion that is coordinated and connected to the guide member is also formed on the mobile base, and during the lifting and lowering process of the lifting end, the guide rail portion moves along the guide member.

[0014] In some embodiments of the present application, the lifting end of the lifting drive member is also connected to an adapter, and the adapter includes a connecting shaft and a limiting top plate and a limiting bottom plate connected to both ends of the connecting shaft; a floating slot is formed on the movable base, and relatively extended overlapping protrusions are formed on both sides of the floating slot; the limiting top plate is fixed to the lifting end of the lifting drive member, the limiting bottom plate is inserted into the floating slot, and the overlapping protrusion is in contact with and connected above the limiting bottom plate.

[0015] In some embodiments of the present application, the length dimension between the two overlapping protrusions is larger than the dimension of the connecting shaft portion and smaller than the dimension of the limiting bottom plate, and the length dimension of the floating slot is larger than the corresponding dimension of the limiting bottom plate.

[0016] In some embodiments of the present application, the detection member is connected to the movable base via a fixing member, and an elastic member is further provided between the detection member and the fixing member.

[0017] In some embodiments of the present application, a demagnetizer is further included. The demagnetizer is connected to the operating table and has a demagnetization position formed thereon. The demagnetizer is used to demagnetize the workpiece before detection to improve detection accuracy.

[0018] In some embodiments of the present application, a conveying mechanism is further included, which is arranged on the operating table. The conveying mechanism includes a conveying drive and a support seat. The support seat is fixed to the moving end of the conveying drive and is used to place the workpiece. The support seat moves between the demagnetization position and the detection position with the conveying drive.

[0019] In some embodiments of the present application, a detection component is further included, and the detection component includes a first detection member and a second detection member, the position of the first detection member corresponds to the demagnetization position, and the second detection member corresponds to the position of the detection position.

[0020] Compared with the prior art, the advantages and positive effects of the utility model are:

[0021] The hardness detection device involved in the present application includes a limit position assembly, in which a lower limit position and a buffer member are arranged on a support table; the upper limit position moves up and down with the detection member to approach or move away from the workpiece placed on the detection position; during the lifting process of the detection member, the detection position of the detection member is limited by the upper limit position, and when the upper limit position contacts the buffer member during the descent process, the descent speed is reduced under the buffering effect of the buffer member, thereby reducing the impact force when the contact of the detection member and the workpiece are in contact; the lower limit position is a hard limit position, and the contact between the upper limit position and the lower limit position can limit the position of the upper limit position, so that the position of the detection member is limited, avoiding collision between the detection member and the workpiece when the lifting drive member has a control deviation, thereby avoiding damage to the workpiece and the detection member;

[0022] In addition, a demagnetizer is provided upstream of the detection position, which can demagnetize the workpiece, making the subsequent hardness detection more accurate.

[0023] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of an embodiment of the hardness detection device proposed by the utility model;

[0026] Figure 2 It is a schematic diagram of the detection component structure;

[0027] Figure 3 It is a plane schematic diagram of the detection component;

[0028] Figure 4 It is a schematic diagram of the connection between the detection component and the lifting drive component;

[0029] In the figure,

[0030] 100. Operation table;

[0031] 200, detection component; 201, second detection member;

[0032] 210, support frame;

[0033] 220, lifting drive member; 221, fixed end; 222, lifting end; 223, adapter;

[0034] 230, detection member; 231, elastic member;

[0035] 240, movable base; 241, guide rail portion; 242, floating notch; 243, overlapping convex portion;

[0036] 250, guide member;

[0037] 260, fixings;

[0038] 300, limit assembly; 310, upper limit; 320, buffer; 330, lower limit;

[0039] 400, workpiece;

[0040] 500, conveying mechanism; 510, conveying driving member; 520, supporting seat;

[0041] 600, demagnetizer; 610, first detection element. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0048] refer to Figure 1 The present application proposes a hardness testing device, which includes an operating table 100, a testing component 200 and a limiting component 300. A supporting table is formed on the operating table 100, and the supporting table serves as a supporting base for the testing component 200 and the limiting component 300.

[0049] A detection position is formed on the support table, and the detection component 200 is used to detect the hardness of the workpiece 400 placed on the detection position.

[0050] Combination Figure 2The detection component 200 specifically includes a support frame 210, a lifting drive member 220 and a detection member 230. The bottom of the support frame 210 is fixed on the support table, the fixed end 221 of the lifting drive member 220 is connected to the support frame 210, and the detection member 230 is connected to the lifting end 222 of the lifting drive member 220.

[0051] The detection part 230 is specifically a Barkhausen hardness detection system, and a detection contact is formed at the end thereof. By using the Barkhausen detection principle, non-destructive sampling and full inspection of the workpiece 400 can be quickly achieved, thereby ensuring product quality, improving production technology, and reducing production costs.

[0052] Specifically, the support frame 210 includes a support base plate 211 and a support vertical plate 212 vertically fixed on the support base plate 211 . In order to improve the connection strength, a reinforcing rib 213 is provided between the support base plate 211 and the support vertical plate 212 .

[0053] The support bottom plate 211 is fixed on the support table, the fixed end 221 of the lifting drive member 220 is connected to the support vertical plate 212, and the lifting end 222 of the lifting drive member 220 moves along the defense line perpendicular to the support table.

[0054] The detection member 230 is located directly above the detection position, and as the lifting end 222 on the lifting drive member 220 rises and falls, it gradually approaches and contacts the workpiece 400, and detects the workpiece 400 placed on the detection position.

[0055] That is, when the workpiece 400 is placed on the detection position, the lifting drive member 220 drives the lifting end 222 to descend, driving the detection member 230 to contact the workpiece 400 to perform non-destructive hardness detection on it.

[0056] When the detection is completed, the lifting drive member 220 drives the lifting end 222 to rise, so that the detection member 230 is away from the workpiece 400, which is convenient for loading and unloading the workpiece 400.

[0057] When the height of the workpiece 400 is relatively high, the height of the support frame 210 needs to be adjusted accordingly to prevent the detection member 230 from being too low. The overall height of the support frame 210 can be adjusted by providing a pad thereunder.

[0058] In some embodiments of the present application, in order to prevent the lifting end 222 of the lifting drive member 220 from descending too quickly, the hardness detection device also includes a limit assembly 300. The limit assembly 300 can slow down and limit the speed when the detection contact at the end of the detection member 230 is about to contact the workpiece 400, thereby reducing the impact force of the contact contacting the workpiece 400 and protecting the contact from being damaged.

[0059] refer to Figure 3The limit assembly 300 includes a lower limit 330 set on the support table, a buffer member 320 and an upper limit 310 connected to the lifting end 222 of the lifting drive member 220. The upper limit 310 rises and falls with the lifting end 222 to approach or move away from the lower limit 330.

[0060] The lifting end 222 of the lifting driving member 220 is connected to the moving base 240 , and the detecting member 230 and the upper limit position 310 are both fixed on the moving base 240 .

[0061] The upper limit position 310 is specifically a horizontal frame structure installed on the movable base 240 , and moves up and down as the movable base 240 rises and falls.

[0062] refer to Figure 2 In order to improve the accuracy of the lifting end 222 during the lifting process, a guide member 250 is further formed on the support frame 210, and a guide rail portion 241 that is coordinated and connected with the guide member 250 is further formed on the movable base 240. During the lifting process of the lifting end 222, the guide rail portion 241 moves along the guide member 250.

[0063] Specifically, the guide member 250 is two guide rails installed on the surface of the lifting vertical plate and arranged at intervals. The guide rail portion 241 is a guide groove formed on the back side of the movable base 240 and adapted to the position of each guide rail. As the lifting end 222 rises and falls, the guide rail portion 241 rises and falls along the guide member 250 to improve the stability of the movement of the detection member 230.

[0064] In other embodiments of the present application, in order to prevent processing and assembly errors from interfering with the lifting and lowering of the lifting end 222 , the lifting end 222 and the movable base 240 are detachably connected via an adapter 223 .

[0065] refer to Figure 4 Specifically, the adapter 223 includes a connecting shaft portion and a limiting top plate and a limiting bottom plate connected to both ends of the connecting shaft portion; the size of the limiting top plate and the limiting bottom plate is larger than the connecting shaft portion, and the parallel cross-sectional shape of the limiting top plate and the limiting bottom plate can be designed to be circular or square or other shapes.

[0066] The connecting shaft portion and the limiting top plate and the limiting bottom plate can be formed in one piece, or can be connected into one piece by welding or mechanical connection.

[0067] The limiting top plate is connected to the lifting end 222 of the lifting drive member 220 by means of fastening screws and other structures.

[0068] A floating slot 242 with an upper opening is formed on the movable base 240 , and overlapping protrusions 243 extending opposite to each other are formed on two sides of the floating slot 242 .

[0069] In the installed state, the limiting bottom plate is inserted into the floating slot 242 below the overlapping protrusion 243, and the overlapping protrusion 243 is in contact with and connected to the top of the limiting bottom plate.

[0070] The first direction is defined as the lifting direction, the second direction is defined as the second direction perpendicular to the first direction, the length dimension between the two overlapping protrusions 243 along the second direction is greater than the dimension of the connecting shaft and smaller than the dimension of the limiting bottom plate, the length dimension of the floating slot 242 along the first direction is greater than the corresponding dimension of the limiting bottom plate, and the height dimension of the limiting bottom plate along the first direction is smaller than the dimension of the overlapping protrusion 243 from the bottom of the floating slot 242.

[0071] Then, there is a certain amount of floating between the adapter and the movable base 240 in the up, down, left and right directions, and the guide part and the guide rail part 241 can be adaptively adjusted according to the actual processing and installation conditions to reduce wear and avoid excessive errors, interference and other problems.

[0072] In some embodiments of the present application, in order to connect the detection member 230 to the mobile base 240 through the fixing member 260, the fixing member 260 is detachably connected to the outer surface of the mobile base 240, an extension portion is formed above the fixing member 260, and the detection member 230 is connected below the extension portion.

[0073] In order to reduce the collision generated when the detection member 230 and the workpiece 400 come into contact, an elastic member 231 is further provided between the detection member 230 and the fixing member 260 .

[0074] The elastic member 231 is specifically a spring member. After the detection member 230 contacts the workpiece 400 , the elastic member 231 is compressed to prevent the detection member 230 from directly colliding with the workpiece 400 and causing damage.

[0075] The buffer 320 mainly functions to slow down the lifting end 222. The maximum height of the buffer 320 is greater than the height of the lower limit 330. The buffer 320 is specifically an oil pressure buffer. As the lifting end 222 descends, the upper limit 310 that descends synchronously therewith contacts with the buffer 320.

[0076] The buffer member 320 provides an upward resistance to the upper limit position 310, which can reduce the speed of the lifting end 222, reduce the impact force of the contact at the end of the detection member 230 contacting the workpiece 400, and protect the contact and the workpiece 400 from being damaged.

[0077] As the lifting end 222 continues to descend, the upper limit 310 contacts the lower limit 330 , which is a hard limit. When the lifting end 222 descends to the point where the upper limit 310 contacts the lower limit 330 , it stops descending.

[0078] At this time, the detection contact of the detection member 230 is in contact with the workpiece 400 , and the elastic member 231 above the detection member 230 is in a compressed state, ensuring that the detection contact is in firm contact with the workpiece 400 .

[0079] refer to Figure 2 , Figure 3 The height of the lower limit 330 is adjustable to adapt to workpieces 400 of different heights, ensuring that the detection member 230 is in contact with the workpiece 400 when the upper limit 310 and the lower limit 330 are in contact.

[0080] In some embodiments of the present application, a threaded hole is formed on the operating table, and the bottom of the lower limit 330 is connected to the threaded hole through a screw rod. The height of the lower limit 330 is adjusted by rotating the screw rod at the bottom of the lower limit 330.

[0081] In order to further improve the accuracy of hardness detection, the hardness detection device also includes a demagnetizer 600, which is connected to the surface of the operating table 100 and has a demagnetization position formed thereon. The demagnetizer 600 is used to demagnetize the workpiece 400 before detection to improve the detection accuracy.

[0082] In order to realize automatic transportation of the workpiece 400 between the demagnetization position and the detection position, the present application also provides a conveying mechanism 500, which is connected to the surface of the operating table 100. The conveying mechanism 500 includes a conveying drive 510 and a support seat 520. A conveying track is preset on the surface of the operating table 100. The two ends of the conveying track extend to the demagnetization position and the detection position respectively. A moving end is formed on the conveying drive 510, and the moving end moves along the conveying track.

[0083] The support seat 520 is fixed to the moving end of the conveying driving member 510 and is used to place the workpiece 400 .

[0084] That is, the workpiece 400 placed on the support seat 520, as the moving end of the conveying drive member 510 moves between the demagnetization position and the detection position, the workpiece 400 completes loading upstream of the demagnetization position, and after being demagnetized by the demagnetizer 600, is conveyed by the conveying drive member 510 to the detection position for detection. After the detection is completed, the workpiece 400 is unloaded, and the empty support seat 520 continues to be conveyed to the upstream of the demagnetization position for the next round of loading.

[0085] During the operation of the conveying drive 510, in order to ensure the stability of the workpiece 400 on the support seat 520, a positioning portion can also be provided on the support seat 520. The positioning portion can be a convex portion provided on the support seat 520 and located on the peripheral side of the workpiece 400, or it can be a baffle or outer edge structure formed on the peripheral side of the support seat 520.

[0086] The support base 520 moves along with the conveying driving member 510 between the demagnetizing position and the detecting position.

[0087] refer to Figure 1 The detection component 200 is used to detect whether the workpiece 400 moves to the demagnetization position or the detection position. Specifically, the detection component 200 includes a first detection member 230 and a second detection member 201. The position of the first detection member 230 corresponds to the demagnetization position, and the position of the second detection member 201 corresponds to the detection position.

[0088] The first detection element 230 and the second detection element 201 can be infrared detection or other forms of detection.

[0089] In the hardness detection device involved in the present application, the detection position of the detection member 230 is limited by the upper limit position 310 during the lifting process. When the upper limit position 310 contacts the buffer member 320 during the descent process, its descent speed is reduced under the buffering effect of the buffer member 320, thereby reducing the impact force when the contact of the detection member 230 contacts the workpiece 400.

[0090] The lower limit 330 is a hard limit. The upper limit 310 contacts the lower limit 330 to limit the position of the upper limit 310, thereby limiting the position of the detection member 230, thereby preventing the detection member 230 from colliding with the workpiece 400 when a control deviation occurs in the lifting drive member 220, thereby preventing damage to the workpiece 400 and the detection member 230.

[0091] In addition, a demagnetizer 600 is provided upstream of the detection position, and the demagnetizer 600 can demagnetize the workpiece 400, so that the subsequent hardness detection accuracy is higher.

[0092] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0093] The above is only a specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A hardness testing device, characterized in that: include: An operating table, on which a supporting table surface is formed, and a detection position is formed on the supporting table surface; A detection component, comprising a support frame, a lifting drive member and a detection member, wherein the bottom of the support frame is fixed on the support table, the fixed end of the lifting drive member is connected to the support frame, the detection member is connected to the lifting end of the lifting drive member, and the detection member is located directly above the detection position and is used to detect a workpiece placed on the detection position; The limit assembly includes a lower limit arranged on the support table, a buffer and an upper limit connected to the lifting end of the lifting drive member. The upper limit rises and falls with the lifting end to approach or move away from the lower limit.

2. The hardness testing device according to claim 1, characterized in that: The height of the lower limit position is adjustable, and when the upper limit position is in contact with the lower limit position, the detection member contacts the workpiece to perform hardness detection on the workpiece.

3. The hardness testing device according to claim 2, characterized in that: A threaded hole is formed on the operating table, and the bottom of the lower limit is connected to the threaded hole through a screw rod.

4. The hardness testing device according to claim 1, characterized in that: The maximum height of the buffer is greater than the height of the lower limit, the buffer is a hydraulic buffer, and the buffer is configured to reduce the descending speed of the lifting end after the upper limit drops to contact the buffer.

5. The hardness testing device according to claim 1, characterized in that: A guide member is also formed on the support frame, and the lifting end of the lifting drive member is connected to a movable base. The detection member and the upper limit are both fixed on the movable base. A guide rail portion that cooperates with the guide member is also formed on the movable base. During the lifting and lowering process of the lifting end, the guide rail portion moves along the guide member.

6. The hardness testing device according to claim 5, characterized in that: The lifting end of the lifting drive member is also connected to an adapter, and the adapter includes a connecting shaft and a limiting top plate and a limiting bottom plate connected to both ends of the connecting shaft; a floating slot is formed on the movable base, and relatively extending overlapping protrusions are formed on both sides of the floating slot; the limiting top plate is fixed to the lifting end of the lifting drive member, the limiting bottom plate is inserted into the floating slot, and the overlapping protrusion is in contact with and connected above the limiting bottom plate.

7. The hardness testing device according to claim 6, characterized in that: The detection member is connected to the movable base via a fixing member, and an elastic member is arranged between the detection member and the fixing member.

8. The hardness testing device according to claim 1, characterized in that: It also includes a demagnetizer, which is connected to the operating table and has a demagnetization position formed thereon. The demagnetizer is used to demagnetize the workpiece before detection to improve detection accuracy.

9. The hardness testing device according to claim 8, characterized in that: It also includes a conveying mechanism, which is arranged on the operating table. The conveying mechanism includes a conveying drive and a support seat. The support seat is fixed to the moving end of the conveying drive and is used to place the workpiece. The support seat moves between the demagnetization position and the detection position with the conveying drive.

10. The hardness testing device according to claim 9, characterized in that: It also includes a detection component, which includes a first detection member and a second detection member. The position of the first detection member corresponds to the demagnetization position, and the second detection member corresponds to the position of the detection position.

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