Pendulum impact testing machine

Abstract

The invention provides a pendulum impact testing machine, which comprises a base, a sliding rod, a motor, a driving assembly and a control assembly, the top surface of the base is provided with a placing groove, the base is internally provided with a main sliding channel parallel to the placing groove, and the middle part of the base is provided with a groove vertically intersected with the placing groove; the sliding rod is connected with the main sliding channel in a sliding mode, a positioning protrusion is arranged in the middle of the side, close to the containing groove, of the sliding rod, and the width of the main sliding channel is larger than the total width of the sliding rod and the positioning protrusion; the control assembly is fixedly arranged on the base and used for pushing the sliding rod to move left and right in the direction perpendicular to the extending line of the sliding rod, so that the positioning protrusion protrudes out of the vertical face of one side of the containing groove. The problem that the position of the notch of the sample piece needs to be calibrated manually is solved, manual operation which influences the accuracy of inspection parameters is avoided, and the efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of testing machines, in particular to a pendulum impact testing machine. Background Art

[0002] The pendulum impact tester is a device used to determine the impact resistance of materials under dynamic loads and is widely used in the fields of materials science and engineering. When doing impact experiments, it is necessary to set a notch that meets the standards on the sample. The pendulum impact tester needs to set a notch on the sample to evaluate the notch sensitivity of the material, promote early failure and change the failure mode, improve the accuracy and comparability of the test results, and study the impact resistance of the material. These reasons together constitute the importance and necessity of setting a notch on the pendulum impact tester.

[0003] During the test, the position of the sample is usually calibrated manually. In the process of manually aligning the notch of the sample, it is difficult to ensure that the notch can be accurately aligned to the center every time due to factors such as the operator's skill level and concentration. This human error may lead to inaccurate test results, thereby affecting the correct evaluation of the impact performance of the material. Due to the uncontrollability of manual operation, even if the same person performs the alignment operation at different times, there may be large differences. And when the number of samples to be tested is large, the efficiency of manual calibration is low. Therefore, it is necessary to optimize the pendulum impact tester. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a pendulum impact testing machine, which solves the problem in the prior art that manual calibration of the notch position of the sample is required, resulting in errors and low work efficiency.

[0005] According to an embodiment of the present invention, a pendulum impact testing machine includes a base, a sliding rod, a motor, a driving assembly and a control assembly, wherein a placement groove is provided on the top surface of the base, a main sliding channel parallel to the placement groove is provided in the base, and a groove perpendicular to the placement groove is provided in the middle of the base; the sliding rod and the main sliding channel are slidably connected, a positioning protrusion is provided in the middle of the sliding rod close to the placement groove, and the width of the main sliding channel is greater than the total width of the sliding rod and the positioning protrusion; the driving assembly is fixedly connected to the base and drives the sliding rod to move along its own extension line; the control assembly is fixedly arranged on the base and is used to push the sliding rod to move left and right in a direction perpendicular to its own extension line, so that the positioning protrusion protrudes from the vertical surface of one side of the placement groove.

[0006] The technical principle of the present invention is: the position of the notch on the side of the sample is sensed by the positioning protrusion, and then the position of the sample is adjusted by adjusting the positioning protrusion so that the notch of the sample corresponds to the rotation trajectory of the pendulum.

[0007] Preferably, the driving assembly includes a motor, the motor is fixedly connected to the base, a gear is fixedly provided on the output shaft of the motor, a bar tooth is provided on the bottom surface of the sliding rod, the gear and the bar tooth are meshed, and the width of the bar tooth is greater than the width of the gear.

[0008] Preferably, the control component includes a plurality of first telescopic rods and a plurality of electromagnetic suction cups, wherein the first telescopic rods and the electromagnetic suction cups are arranged on a side of the main sliding channel away from the placement slot, the fixed section of the first telescopic rod is fixedly connected to the base, the movable section of the first telescopic rod is in sliding contact with the sliding rod, and the first telescopic rod and the electromagnetic suction cups are arranged in parallel along the main sliding channel.

[0009] Preferably, the groove is provided with an introduction section at a position corresponding to the opening of the main sliding channel.

[0010] Preferably, the positioning protrusion and the sliding rod are detachably connected.

[0011] Preferably, rollers are provided at positions of the electromagnetic suction cup and the first telescopic rod close to the sliding rod.

[0012] Preferably, the clamping assembly includes a special side wall, which is located on the side of the placement groove away from the sliding rod, the side wall is slidably connected to the base, a second telescopic rod is fixedly provided on the side of the side wall away from the groove, and the other end of the second telescopic rod is fixedly connected to the base.

[0013] Preferably, a sliding sleeve is coaxially arranged on the movable section of the first telescopic rod, and a spring is arranged between the sliding sleeve and the movable section of the first telescopic rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: when the present invention is used, the sample is quickly placed in the placement slot, and then the motor controls the sliding rod to move horizontally, and at the same time the control component applies a lateral pushing pressure to the sliding rod, and when the positioning protrusion moves to the notch, the motor drives the sliding rod to continue to move, and the positioning protrusion engages in the notch to drive the sample to move, so that the sample notch is centered. The present invention avoids the need to manually perform sample calibration, making the detection process more standardized, and avoiding human influence and reducing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of the base of the present invention.

[0016] Figure 2 It is a schematic diagram of the motor position of the present invention.

[0017] Figure 3It is a schematic diagram of the structure of the first telescopic rod of the present invention.

[0018] In the above drawings: 1, base; 2, groove; 3, side wall; 4, second telescopic rod; 5, placement slot; 6, main sliding channel; 7, motor; 8, gear; 9, sliding rod; 10, first telescopic rod; 11, electromagnetic suction cup; 12, positioning protrusion; 14, sliding sleeve; 15, roller; 16, spring. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1 As shown, the embodiment of the present invention proposes a pendulum impact tester, including a base 1, a controller, a sliding rod 9, a motor 7, a driving assembly and a control assembly. The top surface of the base 1 is provided with a placement groove 5, and the placement groove 5 is adapted to the width of the sample. The base 1 is provided with a main sliding channel 6 parallel to the placement groove 5, and the main sliding channel 6 is fitted with the side of the placement groove 5. The middle part of the base 1 is provided with a groove 2 perpendicular to the placement groove 5. When the pendulum passes through the groove 2, it collides with the sample placed in the placement groove 5. The sliding rod 9 is slidably connected to the main sliding channel 6, and a positioning protrusion 12 is provided in the middle part of the sliding rod 9 near the placement groove 5. The size of the positioning protrusion 12 is continuously adapted to the notch on the sample. The width of the main sliding channel 6 is greater than the total width of the sliding rod 9 and the positioning protrusion 12, so as to avoid the situation where the positioning protrusion 12 and the main sliding channel 6 are blocked. The driving assembly is fixedly connected to the base 1 and drives the sliding rod 9 to move along its own extension line. The control component is fixedly arranged on the base 1 to push the sliding rod 9 to move left and right in a direction perpendicular to its own extension line, so that the positioning protrusion 12 protrudes from the vertical surface of one side of the placement groove 5. The controller and the drive component, the motor 7, the control component and the adjustment component are electrically connected. The standard size of the sample is 10mm×10mm×55mm, and the force generated by the conventional motor 7 can drive the sample to move. In this embodiment, the sample has a U-shaped notch. The depth of the U-shaped notch is 2mm or 5mm, and the bottom curvature radius is 1mm.

[0021] like Figure 2Preferably, the driving assembly includes a motor 7, the motor 7 is fixedly connected to the base 1, a gear 8 is fixedly provided on the output shaft of the motor 7, a bar tooth is provided on the bottom surface of the sliding rod 9, the gear 8 is meshed with the bar tooth, and the width of the bar tooth is greater than the width of the gear 8. In this embodiment, the motor 7 is a servo motor 7, which accurately controls the rotation of the gear 8 and drives the sliding rod 9 to move. When the sliding rod 9 moves left and right, the gear 8 always keeps meshing with the bar tooth. There are gaps between the bar tooth and both ends of the sliding rod 9, and the smooth surfaces at both ends of the sliding rod 9 are in contact with the bottom surface of the main sliding channel 6, reducing the friction between the bar tooth and the main sliding channel 6. When the sample moves to the middle of the groove 2, the motor 7 rotates in the opposite direction to drive the sliding rod 9 to retreat away from one end of the motor 7.

[0022] Preferably, the control assembly includes a plurality of first telescopic rods 10 and a plurality of electromagnetic suction cups 11, wherein the first telescopic rods 10 and the electromagnetic suction cups 11 are arranged on a side of the main sliding channel 6 away from the placement slot 5, the fixed section of the first telescopic rod 10 is fixedly connected to the base 1, the movable section of the first telescopic rod 10 is in sliding contact with the sliding rod 9, and the first telescopic rod 10 and the electromagnetic suction cups 11 are arranged in parallel along the main sliding channel 6. The first telescopic rod 10 and the electromagnetic suction cups 11 enable the sliding rod 9 to move to the left or right side close to the main sliding channel 6. The motor 7, the electromagnetic suction cups 11 and the controller are electrically connected.

[0023] Preferably, the groove 2 is provided with an introduction section at the position corresponding to the opening of the main sliding channel 6. When the pendulum strikes the sample, the sliding rod 9 moves into the main sliding channel 6 on one side of the groove 2. When a new sample is placed, the sliding rod 9 enters from the opening on the other side of the main sliding channel 6 cut off by the groove 2. The introduction section prevents the sliding rod 9 from being stuck. The introduction section is a trumpet-shaped structure.

[0024] Preferably, the positioning protrusion 12 and the sliding rod 9 are detachably connected. After long-term use, the positioning protrusion 12 will be worn and lose its proper function. The positioning protrusion 12 can be directly removed and replaced with a new spare part. Or if the size of the notch of the sample changes, the positioning protrusion 12 can be replaced. The positioning protrusion 12 and the sliding rod 9 are connected by screws. The positioning protrusion 12 is wear-resistant metal.

[0025] Preferably, rollers 15 are provided at positions of the electromagnetic suction cup 11 and the first telescopic rod 10 close to the sliding rod 9 to reduce friction between the sliding rod 9 and the electromagnetic suction cup 11 and the first telescopic rod 10, so that the sliding rod 9 can slide more smoothly.

[0026] Preferably, the clamping assembly includes a special side wall 3, which is located on the side of the placement groove 5 away from the sliding rod 9, the side wall 3 is slidably connected to the base 1, and a second telescopic rod 4 is fixedly provided on the side of the side wall 3 away from the groove 2, and the other end of the second telescopic rod 4 is fixedly connected to the base 1. In this embodiment, the second telescopic rod 4 is a spiral telescopic rod. The second telescopic rod 4 is electrically connected to the controller. In order to detect samples of different widths, the second telescopic rod 4 drives the side wall 3 to slide, thereby changing the width of the placement groove 5. A gap is set between the placement groove 5 and the current measured sample, so that the staff can place the sample directly in the placement groove 5. After the sliding rod 9 moves the sample notch to the middle of the groove 2, the second telescopic rod 4 extends so that the side wall 3 and the base 1 clamp the sample.

[0027] like Figure 3 Preferably, the movable section of the first telescopic rod 10 is coaxially provided with a sliding sleeve 14, and a spring 16 is provided between the sliding sleeve 14 and the movable section of the first telescopic rod 10. When the first telescopic rod 10 is extended, the movable section of the first telescopic rod 10 is in elastic contact with the sliding rod 9, and the spring 16 plays a buffering role to prevent the sliding rod 9 from being stuck in the main sliding channel 6 when the first telescopic rod 10 is extended.

[0028] Working steps: The worker places the sample in the placement groove 5, the motor 7 drives the gear 8 to rotate, and the gear 8 drives the sliding rod 9 to move along the main sliding channel 6 through the bar teeth. When the end of the sliding rod 9 passes through the groove 2 and enters the main sliding channel 6 on the other side, when the positioning protrusion 12 moves to the groove 2, the first telescopic rod 10 pushes the sliding rod 9 to move to one side of the placement groove 5, the positioning protrusion 12 and the side of the sample are in friction contact, and the sliding groove continues to move along the main sliding channel 6. When the positioning protrusion 12 encounters the notch on the sample, the positioning protrusion 12 and the notch are engaged, and the moving sliding rod 9 will drive the sample to move, so that the notch of the sample is located in the middle of the groove 2 corresponding to the rotating surface of the pendulum, and the second telescopic rod 4 extends, so that the side wall 3 and the base 1 clamp the sample. Then the electromagnetic suction cup 11 is turned on to drive the sliding rod 9 in the direction away from the sample, and the motor 7 makes the sliding rod 9 retreat to one side of the groove 2.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A pendulum impact testing machine, characterized in that: The invention comprises a base (1), a sliding rod (9), a motor (7), a clamping assembly, a driving assembly and a control assembly. The top surface of the base (1) is provided with a placement groove (5), the base (1) is provided with a main sliding channel (6) parallel to the placement groove (5), and the middle part of the base (1) is provided with a groove (2) perpendicularly intersecting the placement groove (5); the sliding rod (9) and the main sliding channel (6) are slidably connected, and a positioning protrusion is provided in the middle part of the sliding rod (9) close to the placement groove (5). (12), the width of the main sliding channel (6) is greater than the total width of the sliding rod (9) and the positioning protrusion (12); the driving assembly is fixedly connected to the base (1) and drives the sliding rod (9) to move along its own extension line; the control assembly is fixedly arranged on the base (1) and is used to push the sliding rod (9) to move left and right in a direction perpendicular to its own extension line, so that the positioning protrusion (12) protrudes from the vertical surface of one side of the placement groove (5); the clamping assembly is used to fix the sample in the placement groove (5).

2. A pendulum impact testing machine as claimed in claim 1, characterized in that: The driving assembly comprises a motor (7), the motor (7) and the base (1) are fixedly connected, a gear (8) is fixedly arranged on the output shaft of the motor (7), a bar tooth is arranged on the bottom surface of the sliding rod (9), the gear (8) and the bar tooth are meshed, and the width of the bar tooth is greater than the width of the gear (8).

3. A pendulum impact testing machine as claimed in claim 1, characterized in that: The control assembly comprises a plurality of first telescopic rods (10) and a plurality of electromagnetic suction cups (11); the first telescopic rods (10) and the electromagnetic suction cups (11) are arranged on a side of the main sliding channel (6) away from the placement groove (5); the fixed section of the first telescopic rod (10) is fixedly connected to the base (1); the movable section of the first telescopic rod (10) is in sliding contact with the sliding rod (9); and the first telescopic rod (10) and the electromagnetic suction cups (11) are arranged in parallel along the main sliding channel (6).

4. A pendulum impact testing machine as claimed in claim 1, characterized in that: The groove (2) is provided with an introduction section at a position corresponding to the opening of the main sliding channel (6).

5. A pendulum impact testing machine as claimed in claim 1, characterized in that: The positioning protrusion (12) and the sliding rod (9) are detachably connected.

6. A pendulum impact testing machine as claimed in claim 3, characterized in that: Rollers (15) are provided on the electromagnetic suction cup (11) and the first telescopic rod (10) at positions close to the sliding rod (9).

7. A pendulum impact testing machine as claimed in claim 1, characterized in that: The clamping assembly comprises a special side wall (3), which is located on the side of the placement groove (5) away from the sliding rod (9), the side wall (3) is slidably connected to the base (1), and a second telescopic rod (4) is fixedly arranged on the side of the side wall (3) away from the groove (2), and the other end of the second telescopic rod (4) is fixedly connected to the base (1).

8. A pendulum impact testing machine as claimed in claim 3, characterized in that: A sliding sleeve (14) is coaxially arranged on the movable section of the first telescopic rod (10), and a spring (16) is arranged between the sliding sleeve (14) and the movable section of the first telescopic rod (10).

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