Electronic tension testing machine

Abstract

The utility model relates to the technical field of tensile testing machines, and discloses an electronic tensile testing machine which comprises two clamping assemblies which are symmetrically arranged up and down, the clamping assembly on the lower side is fixedly arranged on a rack, and the clamping assembly on the upper side is fixed on a lifting assembly; the lifting assembly comprises a lifting seat, and the lifting seat is connected with the clamping assembly on the upper side through a tension sensor; the lifting seat is connected to the two vertically-arranged guide rods in a sliding mode and connected with a screw driving the lifting seat to ascend and descend. Through the two guide rods and the screws which are arranged in a triangular mode, the overall strength can be improved, the accuracy of a tension test is improved, meanwhile, the clamping phenomenon can be prevented through single-screw driving, and the overall stability of the tension testing machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tensile testing machines, in particular to an electronic tensile testing machine. Background Art

[0002] Existing electronic tensile testing machines consist of two clamping blocks, one fixed to the frame and the other to a lifting block. The lifting block is screwed onto two screws, and the rotation of the screws allows the lifting block to be raised and lowered. However, this structure has the following drawbacks: First, when stretching high-tensile electronic wire or other linear or ribbon-shaped materials, the screws can bend and vibrate where they are under greater force, affecting test results. Second, the two screws require good synchronous rotation to drive the lifting block. However, due to the machining precision of the screws and the hysteresis of one screw's rotation, the lifting block can easily become stuck, resulting in poor stability of the testing machine. Utility Model Content

[0003] The purpose of the utility model is to provide an electronic tensile testing machine, which can increase the overall strength and improve the accuracy of the tensile test through the two guide rods and screw rods arranged in a triangle. At the same time, the single screw drive can prevent the occurrence of jamming and improve the overall stability of the tensile testing machine.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] An electronic tensile testing machine comprises two symmetrically arranged clamping assemblies, the lower clamping assembly being fixed to a frame, and the upper clamping assembly being fixed to a lifting assembly. The lifting assembly comprises a lifting seat, which is connected to the upper clamping assembly via a tension sensor. The lifting seat is slidably connected to two vertically arranged guide rods and is connected to a screw that drives it up and down. The guide rods are fixed to the frame, and the screw is rotatably connected to the frame.

[0006] Through the above technical solution, during the test, the two ends of the test workpiece are fixed on the two clamping assemblies respectively, and then the lifting seat moves upward to drive the tension sensor to move upward, and the tension sensor drives the upper clamping assembly to move upward and straighten the test workpiece.

[0007] The utility model is further configured as follows: the two guide rods and the screw rod are arranged in a triangle.

[0008] By setting up two guide rods and screw rods, the number is greater than the original two lead screw rods, so the strength is stronger and the probability of bending is reduced; at the same time, the three rods are set in a triangle, which can further improve its stability.

[0009] The utility model is further configured as follows: a first synchronous pulley is fixed to the bottom of the screw, the first synchronous pulley is connected to a second synchronous pulley via a synchronous belt, and the second synchronous pulley is fixed to the motor shaft of the servo motor. The servo motor is fixed to the frame and electrically connected to the controller.

[0010] During the test, the tensile force exerted on the test workpiece reacts to the tensile sensor, causing the tensile sensor to produce a certain amount of stretching. The tensile sensor transmits the signal to the controller for processing. At the same time, the number of turns of the servo motor and the pitch of the screw can be converted to obtain the lifting amplitude of the lifting seat. The controller can obtain the number of turns of the servo motor through the servo motor's internal encoder and other related components. The controller can then analyze the yield strength, tensile strength, elongation and other parameters of the test workpiece.

[0011] The utility model is further configured as follows: an extended internal threaded sleeve is sleeved and fixed on the lifting seat, and the internal threaded sleeve is threadedly connected to the screw rod.

[0012] Through the above technical solution, the connection length between the screw and the internal threaded sleeve can be increased by lengthening the internal threaded sleeve, thereby increasing the force-bearing area and avoiding the bending of the screw.

[0013] The present invention further provides that the clamping assembly includes a clamping cartridge seat, the outer wall of the open end of which is formed with multiple pairs of symmetrically arranged threaded holes, each of which is threaded with a locking screw. The clamping cartridge seat of the upper clamping assembly is fixed to the lifting base, while the clamping cartridge seat of the lower clamping assembly is fixed to the bottom of the frame, with the two clamping cartridge seats being coaxially arranged.

[0014] The test workpiece is inserted into the clamping cylinder seat, and then the locking screw is screwed into the threaded hole. The test workpiece is clamped by the opposing clamping of a pair of opposing screws. If the workpiece is large or irregular in shape, it can be locked by more locking screws.

[0015] The utility model is further configured such that: a groove is formed on one end portion of two locking screws threadedly connected to a pair of symmetrically arranged threaded holes.

[0016] Providing a groove at the end of the screw can increase the clamping force between the screw and the workpiece and prevent it from slipping.

[0017] The utility model is further configured as follows: a protective cover is provided on the outer side of the tension sensor, and the protective cover is fixed on the lifting seat.

[0018] The protective cover can effectively protect the tension sensor and prevent it from being collided, knocked, etc.

[0019] The outstanding effects of the utility model are:

[0020] Compared with the existing technology, the two guide rods and screw rods arranged in a triangle can increase the overall strength and improve the accuracy of the tensile test. At the same time, the single screw drive can prevent the occurrence of jamming and improve the overall stability of the tensile testing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 for Figure 1 About the cross-sectional view of AA;

[0023] Figure 3 for Figure 1 About the cross-sectional view of BB;

[0024] Figure 4 This is a schematic diagram of the assembly of the clamping assembly and the test workpiece of the present invention.

[0025] Reference numerals: 10, clamping assembly; 101, clamping cartridge seat; 102, threaded hole; 103, locking screw; 104, groove;

[0026] 20. Rack;

[0027] 30. Lifting assembly; 301. Lifting seat; 302. Tension sensor; 303. Guide rod; 304. Screw; 305. First synchronous pulley; 306. Synchronous belt; 307. Second synchronous pulley; 308. Servo motor; 309. Internally threaded sleeve; 310. Protective cover;

[0028] 90. Test workpiece. DETAILED DESCRIPTION

[0029] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] The following references Figures 1 to 4 The utility model is described as follows:

[0031] An electronic tensile testing machine includes two symmetrical clamping assemblies 10, one above the other. The lower clamping assembly 10 is fixed to a frame 20, while the upper clamping assembly 10 is fixed to a lifting assembly 30. The lifting assembly 30 includes a lifting base 301, which is connected to the upper clamping assembly 10 via a tension sensor 302. The lifting base 301 is slidably connected to two vertically arranged guide rods 303 and is connected to a screw 304 that drives it up and down. The guide rods are fixed to the frame 20, and the screw is rotatably connected to the frame.

[0032] During the test, the two ends of the test workpiece are fixed on two clamping assemblies respectively, and then the lifting seat moves up to drive the tension sensor to move up. The tension sensor drives the upper clamping assembly to move up and straighten the test workpiece.

[0033] The two guide rods 303 and the screw rod 304 are arranged in a triangle.

[0034] By setting up two guide rods and screw rods, the number is greater than the original two lead screw rods, so the strength is stronger and the probability of bending is reduced; at the same time, the three rods are set in a triangle, which can further improve its stability.

[0035] A first synchronous pulley 305 is fixed to the bottom of the screw 304. This first synchronous pulley 305 is connected to a second synchronous pulley 307 via a synchronous belt 306. The second synchronous pulley 307 is fixed to the motor shaft of a servo motor 308. The servo motor is fixed to the frame and electrically connected to a controller. The servo motor drives the second synchronous pulley to rotate, which in turn drives the first synchronous pulley via the synchronous belt. The first synchronous pulley then drives the screw, thereby raising and lowering the lifting base.

[0036] During the test, the tensile force exerted on the test workpiece reacts to the tensile sensor, causing the tensile sensor to produce a certain amount of stretching. The tensile sensor transmits the signal to the controller for processing. At the same time, the number of turns of the servo motor and the pitch of the screw can be converted to obtain the lifting amplitude of the lifting seat. The controller can obtain the number of turns of the servo motor through the servo motor's internal encoder and other related components. The controller can then analyze the yield strength, tensile strength, elongation and other parameters of the test workpiece.

[0037] An extended internal threaded sleeve 309 is sleeved and fixed on the lifting seat 301 , and the internal threaded sleeve 309 is screwed onto the screw rod 304 .

[0038] By lengthening the internal threaded sleeve, the connection length between the screw and the internal threaded sleeve can be increased, the force-bearing area can be increased, and the bending of the screw can be avoided.

[0039] The clamping assembly 10 includes a clamping cartridge 101. The outer wall of the open end of the clamping cartridge 101 is formed with multiple pairs of symmetrically arranged threaded holes 102, and locking screws 103 are screwed into the threaded holes 102. The clamping cartridge of the upper clamping assembly 10 is fixed to the lifting base 301, while the clamping cartridge of the lower clamping assembly 10 is fixed to the bottom of the frame 20. The two clamping cartridges are arranged coaxially.

[0040] The test workpiece is inserted into the clamping cylinder seat, and then the locking screw is screwed into the threaded hole. The test workpiece is clamped by the opposing clamping of a pair of opposing screws. If the workpiece is large or irregular in shape, it can be locked by more locking screws.

[0041] One end of one of the two locking screws 103 screwed on the pair of symmetrically arranged threaded holes 102 is formed with a groove 104.

[0042] The screw end provided with the groove can increase the clamping force between the screw and the workpiece, and prevent the screw from slipping.

[0043] The outer side of the tension sensor 302 is provided with a protective cover 310 fixed on the lifting seat 301.

[0044] The protective cover can effectively protect the tension sensor from being collided, knocked, etc.

[0045] The above only describes preferred embodiments of the present application, and it should be noted that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and the above assumptions of these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. An electronic tensile testing machine, comprising two clamping assemblies (10) symmetrically arranged in an upper and lower direction, wherein the lower clamping assembly (10) is fixed on a frame (20), and the upper clamping assembly (10) is fixed on a lifting assembly (30); characterized in that: The lifting assembly (30) includes a lifting seat (301), and the lifting seat (301) is connected to the upper clamping assembly (10) via a tension sensor (302); the lifting seat (301) is slidably connected to two vertically arranged guide rods (303) and is connected to a screw (304) for driving it to move up and down; The two guide rods (303) and the screw rod (304) are arranged in a triangle; An extended internal threaded sleeve (309) is sleeved and fixed on the lifting seat (301), and the internal threaded sleeve (309) is screwed onto the screw rod (304); The clamping assembly (10) comprises a clamping cartridge seat (101), wherein a plurality of pairs of symmetrically arranged threaded holes (102) are formed on the outer wall of the open end of the clamping cartridge seat (101), and locking screws (103) are screwed onto the threaded holes (102).

2. The electronic tensile testing machine according to claim 1, characterized in that: A first synchronous pulley (305) is fixed to the bottom of the screw rod (304), the first synchronous pulley (305) is connected to a second synchronous pulley (307) via a synchronous belt (306), and the second synchronous pulley (307) is fixed to the motor shaft of the servo motor (308).

3. The electronic tensile testing machine according to claim 1, characterized in that: One end portion of two locking screws (103) threadedly connected to a pair of symmetrically arranged threaded holes (102) is formed with a groove (104).

4. The electronic tensile testing machine according to claim 1, characterized in that: A protective cover (310) is provided on the outer side of the tension sensor (302), and the protective cover (310) is fixed on the lifting seat (301).

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