Universal material tension tester

Abstract

The utility model relates to the technical field of tension testing machines, and discloses a universal material tension testing machine which comprises a rack, a fixed base is fixed at the lower part of the rack, a liftable movable base is arranged above the fixed base, and a group of clamping components are respectively arranged in the fixed base and the movable base; a cylinder hole and a pair of sliding grooves are formed in each of the fixed base and the movable base. The clamping assembly comprises a piston inserted into the cylinder hole in a sleeved mode and a pair of clamping blocks connected into the sliding groove in a sliding mode, and the piston drives the clamping blocks to move through a driving block. The cylinder holes and the built-in pistons are arranged on the fixed base and the movable base, so that the pressure on the clamping assembly can be greatly improved, and the problems that a workpiece is not clamped tightly and slips are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tensile testing machines, and particularly relates to a universal material tensile testing machine. Background Art

[0002] The existing tensile testing machine includes a fixed base and a movable base that can move relative to each other. An oil cylinder and a pair of clamping components are respectively fixed on the fixed base and the movable base, and the oil cylinder drives the clamping components to clamp the test workpiece. The cylinder block of the oil cylinder in the existing tensile testing machine is fixed on the fixed base or the movable base by means of an inserting sleeve. However, due to the limited sizes of the fixed base and the movable base, the size of the adapted oil cylinder is also limited, so that the pressure provided by the oil cylinder is small, and the workpiece is likely to be not clamped tightly or slip during the test. Content of the Utility Model

[0003] The purpose of the utility model is to provide a universal material tensile testing machine. By arranging cylinder holes and built-in pistons on the fixed base and the movable base, the pressure on the clamping components can be greatly increased, thereby solving the problems of the workpiece not being clamped tightly and slipping.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions:

[0005] A universal material tensile testing machine includes a frame. A fixed base is fixed at the lower part of the frame, and a liftable movable base is arranged above the fixed base. A set of clamping components is respectively arranged in the fixed base and the movable base;

[0006] Cylinder holes and a pair of chutes are respectively formed on the fixed base and the movable base; the clamping components include a piston inserted in the cylinder hole and a pair of clamping blocks slidably connected in the chutes. The piston drives the clamping blocks to move through a driving block.

[0007] By arranging cylinder holes and pistons on the fixed base and the movable base, the diameter of the piston can be increased, so that a greater pressure can be obtained, and thus a greater pressure can be applied to the clamping components. The clamping components can clamp the test workpiece more tightly, and the tensile test results are more stable and reliable.

[0008] The utility model is further arranged as: the pair of chutes are arranged in a "V" shape;

[0009] A "U" - shaped groove is formed at one end of the clamping block close to the piston; the driving block is in an inverted "T" shape, and both ends of the driving block are respectively inserted into the "U" - shaped grooves of the pair of clamping blocks; the middle part of the driving block is fixed on a connecting block, and the connecting block is fixed at the end of the piston.

[0010] The piston drives the driving block to move through the connecting block. The driving block drives the clamping block to move along the sliding groove through the cooperation with the "C"-shaped groove. Since a pair of sliding grooves are arranged in a "V" shape, a pair of clamping blocks can be driven to approach or move away from each other, so as to drive the clamping block to clamp or release the workpiece.

[0011] The present utility model is further configured as: a copper backing plate is fixed on the bottom surface of the sliding groove, and the clamping block is attached to the copper backing plate.

[0012] By arranging a copper cushion block between the clamping block and the fixed base or the movable base, since the copper cushion block is soft, the wear of the clamping block and the wear of the fixed base and the movable base can be reduced, and the service life of the clamping block, the fixed base and the movable base can be improved; since it is the copper cushion block that is worn, only the copper cushion block needs to be replaced.

[0013] The present utility model is further configured as: a cylinder head is fixed at one end of the cylinder bore far from the clamping assembly. The cylinder head is connected with a hydraulic pipe through a pipe joint. The hydraulic pipe is connected with a hydraulic station, and the hydraulic station provides hydraulic oil to the hydraulic pipe or retrieves the hydraulic oil back to the hydraulic station. The hydraulic oil of the hydraulic station enters the cylinder bore through the hydraulic pipe and the pipe joint. The hydraulic oil entering the cylinder bore provides a pressure to the piston, so as to drive the piston to move.

[0014] The present utility model is further configured as: a pair of vertically arranged oil cylinders and a pair of guide rods are fixed on the fixed base. The piston rod of the oil cylinder is fixedly connected with the movable base through a connecting rod; the piston rod of the oil cylinder is fixed at one end of the guide arm, and the other end of the guide arm is inserted and sleeved on the guide rod.

[0015] The piston rod of the oil cylinder extends and带动 the movable base to move upward through the connecting rod. The movable base带动 the upper clamping assembly to move upward. During the test, the two ends of the workpiece are respectively clamped on the two clamping assemblies, so as to stretch the workpiece for a tensile test.

[0016] The present utility model is further configured as: a pair of spring mounting holes are formed on the movable base. The bottom surface of the spring mounting hole is fixed with one end of a tension spring, and the other end of the tension spring is fixedly connected with the corresponding clamping block on the upper side.

[0017] When the test is completed, the hydraulic oil in the cylinder bore flows back to the hydraulic station. The lower piston and the clamping block can automatically move downward and reset by their own gravity. The upper clamping block moves upward and resets under the action of the tension spring. The clamping block acts on the upper piston to make it move upward and reset.

[0018] The present utility model is further configured as: the telescopic direction of the tension spring is arranged parallel to the moving direction of the clamping block.

[0019] The prominent effect of the present utility model is:

[0020] Compared with existing technologies, by setting cylinder holes and built-in pistons on the fixed base and movable base, the pressure on the clamping assembly can be greatly increased, thereby solving the problems of workpiece not being clamped tightly and slipping.

[0021] By installing copper pads, wear between the clamping blocks, fixed base, and movable base can be reduced, thus extending their service life. Attached Figure Description

[0022] Figure 1 This is a top view of the present invention;

[0023] Figure 2 for Figure 1 A magnified view of a portion of A.

[0024] Attached label: 10, rack;

[0025] 20. Fixed base;

[0026] 201. Cylinder bore; 202. Slide groove; 203. With cylinder head; 204. Pipe fitting; 205. Hydraulic pipe;

[0027] 30. Movable base; 31. Hydraulic cylinder; 32. Guide rod; 33. Connecting rod; 34. Guide arm;

[0028] 301. Spring mounting hole;

[0029] 40. Clamping assembly; 401. Piston; 402. Clamping block; 403. Drive block; 404. "U"-shaped groove; 405. Connecting block; 406. Copper pad; 407. Tension spring. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0031] The following is for reference Figures 1 to 2 The present invention will be described as follows:

[0032] A universal tensile testing machine includes a frame 10, a fixed base 20 fixed at the lower part of the frame 10, and a movable base 30 that can be raised and lowered above the fixed base 20. Each of the fixed base 20 and the movable base 30 is provided with a set of clamping components 40.

[0033] The fixed base 20 and the movable base 30 are each formed with a cylinder hole 201 and a pair of sliding grooves 202; the clamping assembly 40 includes a piston 401 inserted in the cylinder hole 201 and a pair of clamping blocks 402 slidably connected in the sliding grooves 202, and the piston 401 drives the clamping blocks 402 to move through the driving block 403.

[0034] By providing cylinder bores and pistons on the fixed base and the movable base, the diameter of the piston can be increased, thereby obtaining a greater pressure, and thus a greater pressure can be applied to the clamping assembly, and the clamping assembly can clamp the workpiece to be tested more tightly.

[0035] More tightly, the tensile test results are more stable and reliable.

[0036] A pair of chutes 202 are arranged in a "V" shape;

[0037] One end of the clamping block 402 close to the piston 401 is formed with a "C" - shaped groove 404; the driving block 403 is in an inverted "T" shape, and both ends of the driving block 403 are respectively inserted into the "C" - shaped grooves 404 of a pair of clamping blocks 402; the middle part of the driving block 403 is fixed on the connecting block 405, and the connecting block 405 is fixed at the end of the piston 401.

[0038] The piston drives the driving block to move through the connecting block, and the driving block drives the clamping block to move along the chute through the cooperation with the "C" - shaped groove. Since a pair of chutes are arranged in a "V" shape, a pair of clamping blocks can be driven to approach each other or move away from each other, thereby driving the clamping block to clamp the workpiece or loosen the workpiece.

[0039] A copper backing plate 406 is fixed on the bottom surface of the chute 202, and the clamping block 402 is fitted on the copper backing plate 406.

[0040] By providing copper pads between the clamping block and the fixed base or the movable base, since the copper pads are soft, the wear of the clamping block and the fixed base and the movable base can be reduced, and the service life of the clamping block, the fixed base and the movable base can be improved; since it is the copper pads that are worn, only the copper pads need to be replaced.

[0041] One end of the cylinder bore 201 far from the clamping assembly 40 is fixed with a cylinder head 203, and the cylinder head 203 is connected with a hydraulic pipe 205 through a pipe joint 204. The hydraulic pipe is connected with a hydraulic station, and the hydraulic station provides hydraulic oil to the hydraulic pipe or withdraws the hydraulic oil back to the hydraulic station. The hydraulic oil of the hydraulic station enters the cylinder bore through the hydraulic pipe and the pipe joint, and the hydraulic oil entering the cylinder bore provides a pressure to the piston, thereby driving the piston to move.

[0042] A pair of vertically arranged oil cylinders 31 and a pair of guide rods 32 are fixed on the fixed base 20. The piston rod of the oil cylinder 31 is fixedly connected with the movable base 30 through a connecting rod 33; the piston rod of the oil cylinder 31 is fixed at one end of the guide arm 34, and the other end of the guide arm 34 is inserted into the guide rod 32.

[0043] The piston rod of the hydraulic cylinder extends and drives the movable base to move upward through the connecting rod. The movable base drives the clamping assembly on the upper side to move upward. During the test, the two ends of the workpiece are clamped on the two clamping assemblies respectively, thereby stretching the workpiece to conduct a tensile test.

[0044] A pair of spring mounting holes 301 are formed on the movable base 30. The bottom surface of the spring mounting holes 301 is fixed to one end of the tension spring 407, and the other end of the tension spring 407 is fixedly connected to the corresponding clamping block 402 on the upper side.

[0045] After the test is completed, the hydraulic oil in the cylinder bore flows back to the hydraulic station. The lower piston and clamping block can automatically move down and reset by their own gravity, while the upper clamping block moves up and reset by the action of the tension spring. The clamping block reacts with the upper piston, causing it to move up and reset.

[0046] The extension and retraction direction of the tension spring 407 is parallel to the movement direction of the clamping block 402.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A universal tensile testing machine, comprising a frame (10), characterized in that: A fixed base (20) is fixed at the lower part of the frame (10). An elevating movable base (30) is arranged above the fixed base (20). A clamping component (40) is arranged in each of the fixed base (20) and the movable base (30). A cylinder hole (201) and a pair of sliding grooves (202) are formed on each of the fixed base (20) and the movable base (30). The clamping component (40) includes a piston (401) inserted in the cylinder hole (201) and a pair of clamping blocks (402) slidably connected in the sliding grooves (202). The piston (401) drives the clamping blocks (402) to move through a driving block (403).

2. The universal tensile testing machine for materials according to claim 1, characterized in that: The pair of sliding grooves (202) are arranged in a "V" shape. A "C" shaped groove (404) is formed at one end of the clamping block (402) close to the piston (401). The driving block (403) is in an inverted "T" shape. Two ends of the driving block (403) are respectively inserted in the "C" shaped grooves (404) of the pair of clamping blocks (402). The middle part of the driving block (403) is fixed on a connecting block (405), and the connecting block (405) is fixed at the end of the piston (401).

3. The universal tensile testing machine according to claim 2, characterized in that: A copper backing plate (406) is fixed on the bottom surface of the sliding groove (202), and the clamping block (402) is fitted on the copper backing plate (406).

4. A universal tensile testing machine for materials according to claim 1, characterized in that: A cylinder head (203) is fixed at one end of the cylinder hole (201) far from the clamping component (40). The cylinder head (203) is connected with a hydraulic pipe (205) through a pipe joint (204).

5. A universal tensile testing machine according to claim 1, characterized in that: A pair of vertically arranged oil cylinders (31) and a pair of guide rods (32) are fixed on the fixed base (20). The piston rod of the oil cylinder (31) is fixedly connected with the movable base (30) through a connecting rod (33). The piston rod of the oil cylinder (31) is fixed at one end of a guide arm (34), and the other end of the guide arm (34) is inserted on the guide rod (32).

6. A universal tensile testing machine for materials according to claim 2, characterized in that: A pair of spring mounting holes (301) are formed on the movable base (30). One end of a tension spring (407) is fixed on the bottom surface of the spring mounting hole (301), and the other end of the tension spring (407) is fixedly connected with the corresponding upper clamping block (402).

7. A universal tensile testing machine according to claim 6, characterized in that: The telescopic direction of the tension spring (407) is arranged parallel to the moving direction of the clamping block (402).

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