Adjustable clamping device for metal material detection

Abstract

The utility model provides an adjustable clamping device for metal material detection, which relates to the technical field of metal material detection and comprises a lifting support, a bidirectional worm driving part, a bidirectional worm, a worm gear type clamping arm, a worm gear, an L-shaped rod, a self-adaptive clamping head and a clamping arm displacement control structure. The structure that the two-way worm with the lead angle smaller than the equivalent friction angle between the worm gear teeth is meshed with the worm gear is adopted, and the risk that a sample slides or loosens is thoroughly eliminated; the driving function is integrated at one position, an operator can control opening and closing of the clamping arms on the two sides only by operating at one position, the inherent stability and the large transmission ratio of worm transmission are combined, clamping operation is labor-saving, rapid and convenient clamping and disassembling are achieved, the detection work efficiency is remarkably improved, and the labor intensity of the operator is lowered. And the electric driving of the bidirectional worm driving part is automatically controlled through the clamping arm displacement control structure, so that the accuracy of clamping force control is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal material detection technical field especially is related to adjustable clamping device for metal material detection. BACKGROUND

[0002] The description in this section is provided only for the purpose of providing background information related to the present disclosure and does not constitute prior art.

[0003] In the mechanical property detection of metal materials, the clamping device is a key component connecting the testing machine and the sample, and its performance directly affects the accuracy and reliability of the test results.

[0004] Traditional clamps usually lack reliable self-locking function, and under the action of long-term or high-frequency load, they are prone to looseness due to vibration or stress relaxation, and have poor stability.

[0005] Some clamps with self-locking function, such as some worm and gear structures, can solve the self-locking problem, but their drive structures are often complex, and the adjustment is not intuitive and convenient, which cannot realize quick and accurate clamping position adjustment, and cannot meet the demand of modern detection laboratory for high efficiency. SUMMARY

[0006] The utility model discloses a kind of adjustable clamping devices for metal material detection, with the advantage of completely eliminating the risk of sample slippage or looseness, just need to operate in a position, it can control the opening and closing of two sides clamping arm, realize quick, convenient clamping and disassembly;The advantage of automated control can ensure the accuracy of clamping force, solve the technical problems that traditional clamps usually lack reliable self-locking function, under the action of long-term or high-frequency load, they are prone to looseness due to vibration or stress relaxation, and have poor stability;Some clamps with self-locking function, their drive structures are often complex, and the adjustment is not intuitive and convenient, which cannot realize quick and accurate clamping position adjustment.

[0007] The utility model provides a kind of adjustable clamping devices for metal material detection, comprising:

[0008] The lifting support is composed of left and right two parts;

[0009] The movable part of the left and right two parts of the lifting support is rotatably equipped with a bidirectional worm drive part at the lower end, which includes a bidirectional worm;

[0010] The movable part of the left and right two parts of the lifting support is symmetrically slidably equipped with a worm clamping arm at the upper end, and a worm wheel is fixedly arranged thereon;

[0011] The worm wheel and the outer wall of the bidirectional worm are meshed on the same side, and the lead angle of the bidirectional worm is less than the equivalent friction angle between the worm teeth;

[0012] The inner side of the left and right parts of the lifting support is fixedly equipped with an L-shaped rod at the upper end;

[0013] The inner side end of the worm gear type clamping arm penetrates the longitudinal part of the L-shaped rod on the same side;

[0014] The opposite ends of the worm gear type clamping arms on both sides are fixedly equipped with self-adaptive clamping heads;

[0015] The clamping arm displacement control structure is equipped on the bidirectional worm drive part.

[0016] In some embodiments, the lifting support comprises:

[0017] The rectangular support has two parallel left and right parts;

[0018] Rectangular windows are arranged on the left and right side walls of the rectangular support;

[0019] A rectangular sliding block is slidingly equipped in the rectangular window of the rectangular support;

[0020] A long screw is screwed on the top surface of the rectangular window of the left rectangular support, and the lower end is rotatably connected to the top surface of the rectangular sliding block on the same side;

[0021] A guide rod penetrates the top surface of the rectangular window of the right rectangular support, and the lower end is fixedly connected to the top surface of the rectangular sliding block on the same side;

[0022] An installation base is fixedly equipped at the lower end of the rectangular support.

[0023] In some embodiments, the bidirectional worm drive part comprises:

[0024] A driving motor is fixedly equipped with a connecting block on the top and bottom surfaces of the end face;

[0025] The connecting block is fixedly connected to the lower end of the movable part of the left part of the lifting support;

[0026] The movable parts of the left and right parts of the lifting support are rotatably equipped at the two ends of the bidirectional worm;

[0027] The output end of the driving motor is fixedly connected to the rotating end part of the bidirectional worm;

[0028] The clamping arm displacement control structure is equipped on the driving motor.

[0029] In some embodiments, the clamping arm displacement control structure comprises:

[0030] The driving motor, torque sensor, and angle encoder are connected in series through the rotating shafts;

[0031] The right end rotating shaft of the angle encoder is fixedly connected to the rotating end part of the bidirectional worm.

[0032] A controller is electrically connected with the driving motor, the torque sensor and the angle encoder respectively.

[0033] In some embodiments, a hand screw round cap is fixedly assembled on the upper end of the long screw rod.

[0034] In some embodiments, the worm gear type clamping arm comprises:

[0035] A through hole is arranged on the upper end of the movable part of the left and right parts of the lifting support;

[0036] A round rod is slidably inserted into the through hole;

[0037] The outer wall of the round rod is integrally formed with a strip-shaped protrusion along the length direction, and the inner wall of the through hole is provided with a sliding groove corresponding to the strip-shaped protrusion along the length direction;

[0038] The strip-shaped protrusion is slidably assembled in the sliding groove;

[0039] The worm gear is sleeved on the inner side end of the outer wall of the round rod and the strip-shaped protrusion;

[0040] A first connecting flange is fixedly assembled on the inner side end of the round rod;

[0041] The outer side end of the self-adaptive clamping head is fixedly connected with the first connecting flange on the same side.

[0042] In some embodiments, the self-adaptive clamping head comprises:

[0043] A connecting rod is fixedly assembled with a second connecting flange on the outer side end;

[0044] The second connecting flange and the first connecting flange are fixedly connected by bolts;

[0045] A rectangular plate is fixedly assembled on the inner side end of the connecting rod.

[0046] In some embodiments, ball head plungers are uniformly fixedly assembled on the inner side surface of the rectangular plate, and the inner side end of each ball head plunger is a ball head.

[0047] In some embodiments, the ball head plungers on the inner side surface of the rectangular plate are arranged in a rectangular array.

[0048] In some embodiments, a support rod is fixedly assembled on the inner side surface of the ball head of the ball head plunger, and a clamping plate is fixedly assembled on the inner side end of the support rod.

[0049] The clamping plate is made of hard alloy.

[0050] Compared with the prior art, the adjustable clamping device for metal material detection has the following improvements and advantages:

[0051] The system employs a bidirectional worm gear meshing structure where the lead angle is smaller than the equivalent friction angle between the worm gear teeth. This constitutes a worm gear transmission system with reverse self-locking characteristics, completely eliminating the risk of sample slippage or loosening. An independent clamping arm displacement control structure is set up to drive the bidirectional worm gear drive unit, integrating the drive function into one place. The operator only needs to operate from one position to control the opening and closing of the clamping arms on both sides. Combined with the inherent smoothness and large transmission ratio of worm gear transmission, the clamping operation is labor-saving, realizing fast and convenient clamping and disassembly, significantly improving the efficiency of the testing work. The clamping arm displacement control structure automates the electric drive of the bidirectional worm gear drive unit, ensuring the accuracy of clamping force control. Attached Figure Description

[0052] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0053] Figure 1 This is a schematic diagram of the structure of this utility model;

[0054] Figure 2 This is a partial structural diagram of the present invention;

[0055] Figure 3 This is a schematic diagram of the clamping arm displacement control structure of this utility model.

[0056] Figure 4 This is a schematic diagram of the worm gear clamping arm structure of this utility model;

[0057] Figure 5 This is a schematic diagram of the adaptive clamping head structure of this utility model.

[0058] Explanation of reference numerals in the attached figures:

[0059] 1-Lifting bracket, 11-Rectangular support column, 12-Rectangular slider, 13-Long screw, 14-Guide rod, 15-Mounting base, 2-Bidirectional worm gear drive unit, 21-Bidirectional worm gear, 22-Drive motor, 23-Connecting block, 3-Worm gear clamping arm, 31-Through hole, 32-Round rod, 33-Strip protrusion, 34-Worm gear, 35-First connecting flange, 4-Adaptive clamping head, 41-Second connecting flange, 42-Connecting rod, 43-Rectangular plate, 44-Ball plunger, 45-Support rod, 46-Clamping plate, 5-Clamping arm displacement control structure, 51-Torque sensor, 52-Angle encoder, 53-Controller, 6-L-shaped rod. Detailed Implementation

[0060] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0061] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0062] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0063] Please see Figures 1-5 This utility model provides a technical solution: an adjustable clamping device for testing metal materials, comprising:

[0064] The lifting support 1 consists of two parts, left and right.

[0065] The lower ends of the movable parts of the left and right sides of the lifting bracket 1 are rotatably equipped with a bidirectional worm gear drive unit 2, which includes a bidirectional worm gear 21;

[0066] The upper ends of the movable parts of the left and right sides of the lifting bracket 1 are symmetrically and slidably equipped with worm gear clamping arms 3, and worm gears 34 are fixedly mounted on them.

[0067] The worm gear 34 meshes with the outer wall of the double-sided worm 21 on the same side, and the lead angle of the double-sided worm 21 is smaller than the equivalent friction angle between the teeth of the worm gear 34.

[0068] L-shaped rods 6 are fixedly mounted on the upper inner sides of both the left and right parts of the lifting bracket 1.

[0069] The inner end of the worm gear clamping arm 3 passes through the longitudinal part of the L-shaped rod 6 on the same side;

[0070] Both ends of the two worm gear clamping arms 3 are fixedly equipped with adaptive clamping heads 4;

[0071] The clamping arm displacement control structure 5 is assembled on the bidirectional worm gear drive unit 2.

[0072] Specifically in this embodiment, the lifting bracket 1 drives the lifting of the movable parts on both sides, which in turn drives the bidirectional worm gear drive part 2 and the worm wheel clamping arm 3 to lift and adjust the height of the clamped metal material.

[0073] Furthermore, a structure in which a bidirectional worm 21 meshes with a worm wheel 34 with a lead angle smaller than the equivalent friction angle between the worm wheel teeth is adopted. This constitutes a worm gear transmission system with reverse self-locking characteristics, which completely eliminates the risk of slippage or loosening of the clamped sample.

[0074] More specifically, an independent "clamping arm displacement control structure 5" is set up to drive the bidirectional worm gear drive unit 2, integrating the drive function into one place. The operator only needs to operate from one position to control the opening and closing of the two worm gear clamping arms 3. Combined with the inherent stability and large transmission ratio of worm gear transmission, the clamping operation is labor-saving, realizing fast and convenient clamping and disassembly, significantly improving the efficiency of inspection work. The clamping arm displacement control structure 5 automatically controls the electric drive of the bidirectional worm gear drive unit 2, ensuring the accuracy of clamping force control.

[0075] It is understandable that the device is fixed below the metal material testing equipment and used in conjunction with existing metal material testing equipment.

[0076] L-shaped rod 6 is used to support the inward and outward sliding of the driven worm gear clamping arm 3.

[0077] In some embodiments, the lifting bracket 1 includes:

[0078] There are two rectangular support columns 11, which are distributed parallel to each other on the left and right sides.

[0079] Rectangular windows are provided on the left and right side walls of the rectangular support column 11;

[0080] A rectangular slider 12 is slidably mounted inside the rectangular window of the rectangular support 11;

[0081] A long screw 13 is screwed onto the top surface of the rectangular window of the left rectangular support 11, and its lower end is rotatably connected to the top surface of the rectangular slider 12 on the same side.

[0082] A guide rod 14 runs through the top surface of the rectangular window of the right rectangular support 11, and its lower end is fixedly connected to the top surface of the rectangular slider 12 on the same side.

[0083] A mounting base 15 is fixedly fitted to the lower end of the rectangular support column 11;

[0084] A hand-tightening round cap is fixedly fitted to the upper end of the long screw 13 to facilitate the rotation operation of the long screw 13.

[0085] Specifically in this embodiment, the long screw 13 at the top of the left rectangular support 11 is rotated and pushed to push the rectangular slider 12 on the same side to slide up and down along the rectangular window of the rectangular support 11 on the same side. This rectangular slider 12 drives the bidirectional worm gear drive 2 and the right rectangular slider 12 to rise and fall.

[0086] Furthermore, the lifting and lowering of the rectangular slider 12 is guided by the sliding of the guide rod 14 on the top surface of the rectangular window of the right rectangular support 11;

[0087] More specifically, the mounting base 15 is fixed to the metal material testing equipment or other platform by bolts;

[0088] Understandably, the rectangular slider 12 has sufficient length to provide mounting space for the bidirectional worm drive 2 and the worm gear clamping arm 3.

[0089] In some embodiments, the bidirectional worm gear drive unit 2 includes:

[0090] The drive motor 22 has connecting blocks 23 fixedly mounted on both the upper and lower sides of its end face;

[0091] Connecting block 23 is fixedly connected to the lower end of the movable part on the left side of lifting bracket 1;

[0092] The lower end of the movable part of the left and right two parts of the lifting bracket 1 is mounted on the rotating shafts at both ends of the bidirectional worm gear 21.

[0093] The output end of the drive motor 22 is fixedly connected to the rotating end of the bidirectional worm gear 21;

[0094] The clamping arm displacement control structure 5 is mounted on the drive motor 22.

[0095] Specifically, in this embodiment, the drive motor 22 is a servo motor connected to an external power supply. The drive motor 22 drives the bidirectional worm gear 21 to rotate.

[0096] Furthermore, the cable connecting the clamping arm displacement control structure 5 and the drive motor 22 has sufficient length, so that even when the drive motor 22 rises to its highest point, the cable length can still meet the power supply requirements for a relaxed connection.

[0097] More specifically, the end face of the drive motor 22 is fixedly connected to the lower end of the movable part on the left side of the lifting bracket 1 via the connecting block 23. This design leaves enough space between the output end of the drive motor 22 and the movable part on the left side of the lifting bracket 1, which is used to install the torque sensor 51 and the angle encoder 52.

[0098] In some embodiments, the clamping arm displacement control structure 5 includes:

[0099] The drive motor 22, torque sensor 51, and angle encoder 52 are connected in series on their rotating shafts.

[0100] The right end of the angle encoder 52 is fixedly connected to the rotating end of the bidirectional worm gear 21;

[0101] The controller 53 is electrically connected to the drive motor 22, the torque sensor 51 and the angle encoder 52 respectively.

[0102] Specifically, in this embodiment, the torque sensor 51 and the angle encoder 52 are both existing technologies. Together with the controller 53, they are used to precisely control the input torque of the drive motor 22, thereby indirectly and precisely controlling the radial clamping force of the adaptive clamping heads 4 on both sides, ensuring the repeatability and reliability of the test conditions.

[0103] In some embodiments, the worm gear clamping arm 3 includes:

[0104] Through hole 31 is provided at the upper end of the movable part of the left and right parts of the lifting bracket 1;

[0105] A round rod 32 is slidably inserted into the through hole 31;

[0106] The outer wall of the round rod 32 is integrally formed with strip-shaped protrusions 33 along the length direction, and the inner wall of the through hole 31 is provided with a groove corresponding to the strip-shaped protrusions 33 along the length direction;

[0107] The strip-shaped protrusion 33 is slidably fitted into the corresponding groove;

[0108] The worm gear 34 is sleeved on the inner end of the outer wall of the round rod 32 and the strip-shaped protrusion 33;

[0109] A first connecting flange 35 is fixedly assembled on the inner end of the round rod 32;

[0110] The outer end of the adaptive clamping head 4 is fixedly connected to the first connecting flange 35 on the same side.

[0111] Specifically in this embodiment, when the bidirectional worm 21 rotates, the worms on both sides drive the worm wheels 34 on the two worm wheel clamping arms 3 respectively. After the worm wheels 34 are driven, the power is transmitted to the round rod 32, so that the strip-shaped protrusion 33 on the outer wall of the round rod 32 slides along the groove on the inner wall of the through hole 31 at the upper end of the movable part of the left and right parts of the lifting bracket 1.

[0112] Furthermore, the bidirectional worm gear 21 rotates synchronously to drive the worm wheels 34 on both sides of the worm wheel clamping arms 3, causing the round rods 32 on both sides to move inward or outward synchronously, thereby driving the adaptive clamping heads 4 on both sides to move towards or in opposite directions.

[0113] More specifically, the first connecting flange 35 and the second connecting flange 41 of the adaptive clamping head 4 are fixedly connected by bolts. After removing all the bolts, the adaptive clamping head 4 can be disassembled, which facilitates the maintenance and replacement of the adaptive clamping head 4.

[0114] It is understandable that the worm gear 34 and the double-acting worm 21 need to be cleaned and maintained before and after use to avoid the accumulation of dust and impurities affecting their use.

[0115] In some embodiments, the adaptive gripper 4 includes:

[0116] The connecting rod 42 has a second connecting flange 41 fixedly mounted on its outer end;

[0117] The second connecting flange 41 and the first connecting flange 35 are fixedly connected by bolts;

[0118] A rectangular plate 43 is fixedly assembled on the inner end of the connecting rod 42;

[0119] A ball-head plunger 44 is uniformly fixedly assembled on the inner side of the rectangular plate 43, with the inner end being a ball head;

[0120] The ball-head plungers 44 on the inner side of the rectangular plate 43 are distributed in a rectangular array;

[0121] A support rod 45 is fixedly mounted on the middle of the inner side of the ball head of the ball head plunger 44, and a clamping plate 46 is fixedly mounted on its inner end.

[0122] The clamping plate 46 is made of cemented carbide.

[0123] Specifically in this embodiment, the first connecting flange 35 and the second connecting flange 41 of the adaptive clamping head 4 are fixedly connected by bolts. After removing all the bolts, the adaptive clamping head 4 can be disassembled, which facilitates the maintenance and replacement of the adaptive clamping head 4.

[0124] Furthermore, the ball plunger 44 is an existing technology application, and the ball plunger 44 has a built-in spring to provide initial clamping force and automatic reset capability for the clamping contact;

[0125] More specifically, the support rod 45 and the clamping plate 46 are connected to the ball end of the ball plunger 44 as contacts. The contacts can swing in all directions within a certain cone angle range. The multiple contacts better wrap the metal material and provide an extremely stable and reliable clamping force.

[0126] Understandably, the cemented carbide clamping plate 46 has sufficient strength and wear resistance to improve its service life.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An adjustable clamping device for testing metal materials, characterized in that, include: The lifting support (1) consists of two parts, left and right. The lower ends of the movable parts of the left and right sides of the lifting bracket (1) are rotatably equipped with a bidirectional worm gear drive unit (2), which includes a bidirectional worm gear (21). The upper ends of the movable parts of the left and right sides of the lifting bracket (1) are symmetrically and slidably equipped with worm gear clamping arms (3), and worm gears (34) are fixedly installed on them. The worm wheel (34) meshes with the outer wall of the bidirectional worm (21) on the same side, and the lead angle of the bidirectional worm (21) is smaller than the equivalent friction angle between the teeth of the worm wheel (34); The upper ends of the inner sides of the left and right parts of the lifting bracket (1) are fixedly fitted with L-shaped rods (6). The inner end of the worm gear clamping arm (3) passes through the longitudinal part of the L-shaped rod (6) on the same side; Both sides of the worm gear clamping arms (3) are fixedly equipped with adaptive clamping heads (4) at opposite ends; The clamping arm displacement control structure (5) is mounted on the bidirectional worm gear drive unit (2).

2. The adjustable clamping device for metal material testing according to claim 1, characterized in that, The lifting support (1) includes: There are two rectangular pillars (11) arranged parallel to each other on the left and right sides; The rectangular support column (11) has rectangular windows on its left and right side walls; A rectangular slider (12) is slidably mounted inside the rectangular window of the rectangular support (11). The rectangular window of the rectangular support (11) on the left side is screwed with a long screw (13), the lower end of which is rotatably connected to the top surface of the rectangular slider (12) on the same side. A guide rod (14) runs through the top surface of the rectangular window of the rectangular support (11) on the right side, and its lower end is fixedly connected to the top surface of the rectangular slider (12) on the same side. The lower end of the rectangular support column (11) is fixedly fitted with an installation base (15).

3. The adjustable clamping device for metal material testing according to claim 1, characterized in that, The bidirectional worm gear drive unit (2) includes: The drive motor (22) has connecting blocks (23) fixedly mounted on both the upper and lower sides of its end face; The connecting block (23) is fixedly connected to the lower end of the movable part on the left side of the lifting bracket (1); The lower ends of the movable parts of the left and right sides of the lifting bracket (1) are rotatably mounted on the two ends of the bidirectional worm gear (21). The output end of the drive motor (22) is fixedly connected to the rotating end of the bidirectional worm gear (21); The clamping arm displacement control structure (5) is mounted on the drive motor (22).

4. The adjustable clamping device for metal material testing according to claim 3, characterized in that, The clamping arm displacement control structure (5) includes: The drive motor (22), torque sensor (51) and angle encoder (52) are connected in series on their rotating shafts; The right end of the angle encoder (52) is fixedly connected to the rotating end of the bidirectional worm (21); The controller (53) is electrically connected to the drive motor (22), torque sensor (51) and angle encoder (52), respectively.

5. An adjustable clamping device for testing metal materials according to claim 2, characterized in that, The upper end of the long screw (13) is fixedly fitted with a hand-tightening round cap.

6. The adjustable clamping device for metal material testing according to claim 1, characterized in that, The worm gear clamping arm (3) includes: Through hole (31), which is opened at the upper end of the movable part of the left and right parts of the lifting bracket (1); A round rod (32) is slidably inserted into the through hole (31); The outer wall of the round rod (32) is integrally formed with a strip-shaped protrusion (33) along the length direction, and the inner wall of the through hole (31) is provided with a groove corresponding to the strip-shaped protrusion (33) along the length direction. The strip-shaped protrusion (33) is slidably fitted into the corresponding groove; The worm gear (34) is sleeved on the inner end of the outer wall of the round rod (32) and the strip protrusion (33); The inner end of the round rod (32) is fixedly fitted with a first connecting flange (35); The outer end of the adaptive clamping head (4) is fixedly connected to the first connecting flange (35) on the same side.

7. An adjustable clamping device for testing metal materials according to claim 6, characterized in that, The adaptive gripper (4) includes: The connecting rod (42) has a second connecting flange (41) fixedly mounted on its outer end. The second connecting flange (41) and the first connecting flange (35) are fixedly connected by bolts; A rectangular plate (43) is fixedly assembled on the inner end of the connecting rod (42).

8. An adjustable clamping device for testing metal materials according to claim 7, characterized in that, The inner side of the rectangular plate (43) is uniformly fixed with ball-head plungers (44), the inner end of which is a ball head.

9. An adjustable clamping device for testing metal materials according to claim 8, characterized in that, The ball-head plungers (44) on the inner side of the rectangular plate (43) are arranged in a rectangular array.

10. An adjustable clamping device for testing metal materials according to claim 8, characterized in that, The ball head plunger (44) has a support rod (45) fixedly mounted on the middle of the inner side of the ball head, and a clamping plate (46) fixedly mounted on its inner end. The clamping plate (46) is made of cemented carbide.

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