Material fatigue testing machine for special equipment production

Abstract

The invention discloses a material fatigue testing machine for special equipment production, and relates to the technical field of testing machines, the material fatigue testing machine comprises a base, a vertical rod is fixedly mounted on the base, a top plate is fixedly mounted on the vertical rod, a plurality of test rods are mounted on the top plate, and the test rods are L-shaped; a first sliding plate is arranged on the base, and a servo motor is fixedly installed on the first sliding plate. According to the material fatigue testing machine for special equipment production provided by the invention, the state of the second disc can be switched through the forward and reverse conversion connecting mechanism, so that the second disc rotates or translates, and the pressing plate moves in the rotating process, so that a pressure fatigue test is performed on a spring; and when the second disc translates, the spring is subjected to a bending fatigue test, so that a pressure test and a bending test can be carried out in the test, instrument transfer of the spring is avoided, and the test steps and time are saved.

Description

Technical Field

[0001] This invention relates to the field of testing machine technology, and specifically to a fatigue testing machine for materials used in the production of special equipment. Background Technology

[0002] Special equipment refers to equipment that involves life safety and is highly dangerous. Therefore, during the production of such equipment, fatigue tests are required on the materials used to determine the service life of the equipment and thus avoid safety accidents caused by material problems.

[0003] Springs are mechanical parts that work by utilizing elasticity. They are widely used in special equipment. Therefore, springs need to undergo strict fatigue testing during production. However, some existing fatigue testing machines can only perform pressure tests on springs. When bending tests are required, a different instrument is often needed, making the entire testing process cumbersome and requiring a large number of instruments. Summary of the Invention

[0004] The purpose of this invention is to provide a material fatigue testing machine for special equipment production, so as to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fatigue testing machine for materials used in the production of special equipment, comprising a base, a vertical pole fixedly mounted on the base, a top plate fixedly mounted on the vertical pole, and a plurality of test rods L-shaped mounted on the top plate; a first sliding plate provided on the base, a servo motor fixedly mounted on the first sliding plate, and a forward / reverse conversion connection mechanism provided at the output end of the servo motor; a rotating drum mounted on the first sliding plate, a friction wheel rotatably mounted on the rotating drum, an abutment rod fixedly mounted on the friction wheel, a fixed frame fixedly mounted on the vertical plate, and a fixed plate fixedly mounted on the fixed frame; A rotating rod is slidably installed inside the rotating cylinder, a connecting plate is fixedly installed on the rotating rod, a pressure plate is slidably installed on the connecting plate, a square plate is slidably installed horizontally on the vertical plate, a telescopic rod is slidably installed vertically on the square plate, and a ring is fixedly installed at the bottom end of the telescopic rod. The state of the second disk is switched by a forward and reverse switching connection mechanism, so that the second disk can rotate or translate. During the rotation, the pressure plate moves to perform a pressure fatigue test on the spring, while during the translation of the second disk, a bending fatigue test is performed on the spring.

[0006] Preferably, the forward / reverse conversion connection mechanism includes a first disc fixedly installed at the output end of the servo motor, a protrusion fixedly installed on the first disc, a connecting frame fixedly installed on the first slide plate, a limit rod fixedly installed on the connecting frame, a second disc installed on the limit rod, a connecting block fixedly installed on the second disc, and a beveled edge provided on the connecting block.

[0007] Preferably, a circular plate is fixedly mounted on the friction wheel.

[0008] Preferably, a second slide plate is also included, and the rotating rod is rotatably mounted inside the second slide plate; The rotating drum is provided with a threaded groove, and a protrusion is fixedly installed on the inner wall of the first sliding plate, with the protrusion extending into the threaded groove. An abutment plate is fixedly installed on the rotating rod, and a rotating shaft is rotatably installed on the upright plate. A rotating plate is fixedly installed on the rotating shaft, and the abutment plate and the rotating plate abut against each other.

[0009] Preferably, the test rod is L-shaped.

[0010] Preferably, a displacement plate is rotatably mounted on the bottom end of the fixed frame, and the top dimension of the displacement plate is larger than the bottom dimension. The connecting plate has a through hole, and a sliding rod is horizontally slidably installed inside the connecting plate. The pressure plate and the sliding rod are fixedly connected.

[0011] Preferably, the displacement plate has a chamfer at the rear of its top end.

[0012] Preferably, a coil spring is installed between the rotating shaft and the vertical plate.

[0013] Preferably, a first electric push rod is fixedly installed on the test rod, and a second electric push rod is fixedly installed on the square plate, with the free end of the second electric push rod being fixedly connected to the telescopic rod.

[0014] Preferably, the test rod is fixedly mounted on the top plate with screws.

[0015] In the above technical solution, the present invention provides a material fatigue testing machine for special equipment production, which has the following beneficial effects: the state of the second disc can be switched by the forward and reverse conversion connection mechanism so that the second disc can rotate or translate. During the rotation, the pressure plate moves to perform a pressure fatigue test on the spring, and when the second disc translates, a bending fatigue test is performed on the spring. Thus, pressure test and bending test can be performed in the test, avoiding the need to transfer the spring to the instrument, thereby saving test steps and time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a three-dimensional structural schematic diagram provided for an embodiment of the present invention; Figure 2 Provided for embodiments of the present invention Figure 1 Partial structural diagram; Figure 3 Provided for embodiments of the present invention Figure 2 Partial structural diagram; Figure 4 This is a partial structural schematic diagram of the test rod provided in an embodiment of the present invention; Figure 5 This is a partial structural schematic diagram of the friction wheel provided in an embodiment of the present invention; Figure 6 This is a partial structural schematic diagram of the first disk provided in an embodiment of the present invention; Figure 7 This is a partial structural schematic diagram of the displacement plate provided in an embodiment of the present invention; Figure 8 This is a partial structural schematic diagram of the fixing plate provided in an embodiment of the present invention; Figure 9 This is a partial structural diagram of the connecting plate provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Base; 2. Upright pole; 3. Top plate; 4. Test rod; 41. First electric push rod; 5. Upright plate; 61. First sliding plate; 62. Servo motor; 63. First disc; 64. Protrusion; 65. Second disc; 66. Connecting block; 67. Limiting rod; 671. Connecting frame; 68. Friction wheel; 681. Circular plate; 69. Abutment rod; 610. Second sliding plate; 71. Rotating rod; 72. Connecting plate; 73. Pressure plate; 74. Sliding rod; 75. Positioning plate; 76. Fixed frame; 761. Fixed plate; 77. Abutment plate; 78. Rotating plate; 79. Telescopic rod; 710. Ring; 711. Rotating shaft; 712. Square plate; 713. Rotating cylinder. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Please see Figures 1-9The present invention provides a material fatigue testing machine for special equipment production, including a base 1, a vertical rod 2 fixedly installed on the base 1, a top plate 3 fixedly installed on the vertical rod 2, and a plurality of test rods 4 installed on the top plate 3, the test rods 4 being L-shaped; A first slide plate 61 is provided on the base 1, and a servo motor 62 is fixedly installed on the first slide plate 61. The output end of the servo motor 62 is provided with a forward and reverse conversion connection mechanism. A rotating drum 713 is installed on the first sliding plate 61. A friction wheel 68 is rotatably installed on the rotating drum 713. An abutment rod 69 is fixedly installed on the friction wheel 68. A fixing frame 76 is fixedly installed on the upright plate 5. A fixing plate 761 is fixedly installed on the fixing frame 76. Inside the rotating drum 713, a rotating rod 71 is slidably installed. A connecting plate 72 is fixedly installed on the rotating rod 71. A pressure plate 73 is slidably installed on the connecting plate 72. A square plate 712 is slidably installed horizontally on the vertical plate 5. A telescopic rod 79 is slidably installed vertically on the square plate 712. A ring 710 is fixedly installed at the bottom end of the telescopic rod 79. The state of the second disk 65 is switched by a forward and reverse conversion connection mechanism so that the second disk 65 can rotate or translate. During the rotation, the pressure plate 73 moves to perform a pressure fatigue test on the spring, and during the translation of the second disk 65, a bending fatigue test is performed on the spring. A pressure sensor is installed on the pressure plate 73. When the servo motor 62 rotates in one direction, it drives the friction wheel 68 to rotate via a forward / reverse switching mechanism. This causes the abutment rod 69 on the friction wheel 68 to contact the fixed plate 761. The abutment rod 69 then experiences a reaction force, causing the first sliding plate 61 to move horizontally. The first sliding plate 61 moves towards the ring 710, and this movement of the first sliding plate 61 causes the pressure plate 73 to move towards the ring 710. (The reference is missing from the original text.) Figure 3 At this time, when the servo motor 62 drives the friction wheel 68 to rotate, the pressure plate 73 will cooperate with the ring 710 to perform a pressing fatigue test on the spring between the two.

[0021] In another embodiment of the present invention: the forward and reverse conversion connection mechanism includes a first disk 63 fixedly installed at the output end of the servo motor 62, a protrusion 64 fixedly installed on the first disk 63, a connecting frame 671 fixedly installed on the first slide plate 61, a limit rod 67 fixedly installed on the connecting frame 671, a second disk 65 installed on the limit rod 67, a connecting block 66 fixedly installed on the second disk 65, and a beveled edge provided on the connecting block 66; When performing a compression fatigue test on a spring, refer to Figure 9At this time, the servo motor 62 rotates forward, driving the first disk 63 to rotate. The protrusion 64 on the first disk 63 will contact the right-angle end of the connecting block 66. The rotation of the first disk 63 will drive the connecting block 66 to rotate through the protrusion 64, thereby causing the connecting block 66 to drive the second disk 65 to rotate. The second disk 65 will then rotate on the limit rod 67. As the first disk 63 rotates, the second disk 65 comes into contact with the friction wheel 68, causing the second disk 65 to rotate. The friction wheel 68 will rotate, which will cause the abutment rod 69 to rotate, so that the abutment rod 69 will contact the fixed plate 761, and move against the pressure plate 73 by relying on the reaction force. When the servo motor 62 reverses, the protrusion 64 on the first disk 63 will contact the inclined side of the connecting block 66. At this time, the connecting block 66 is squeezed and drives the second disk 65 to move away from the first disk 63. At this time, the second disk 65 will not drive the friction wheel 68 to rotate. The limiting rod 67 extends into the interior of the second disk 65, and a return spring is fixedly installed at one end of the limiting rod 67 inside the second disk 65. Thus, when the second disk 65 is squeezed by the protrusion 64 on the first disk 63, the return spring is compressed until the protrusion 64 no longer abuts against the connecting block 66. At this time, the return spring will push the second disk 65 to reset.

[0022] In another embodiment of the present invention: a circular plate 681 is fixedly mounted on the friction wheel 68; A groove is formed between the circular plate 681 and the friction wheel 68, and the second disc 65 is located in the groove. When the second disc 65 moves, it will drive the friction wheel 68 to move.

[0023] In another embodiment of the present invention, a second sliding plate 610 is further included, and a rotating rod 71 is rotatably mounted inside the second sliding plate 610. The rotating drum 713 has a threaded groove, and a protruding strip is fixedly installed on the inner wall of the first sliding plate 61, with the protruding strip extending into the threaded groove. A contact plate 77 is fixedly installed on the rotating rod 71, a rotating shaft 711 is rotatably installed on the upright plate 5, and a rotating plate 78 is fixedly installed on the rotating shaft 711. The contact plate 77 and the rotating plate 78 abut against each other. Several upright plates 5 are fixedly installed on the base 1, and the upright plates 5 are in pairs. The first sliding plate 61 and the second sliding plate 610 are respectively slidably installed on the two upright plates 5 in the same group. The rotating rod 71 and the rotating drum 713 slide axially without rotating. When the servo motor 62 reverses and drives the second disk 65 to move horizontally, the second disk 65 will drive the friction wheel 68 to move horizontally. The friction wheel 68 will then drive the rotating drum 713 to move horizontally. As the rotating drum 713 moves, it rotates within the first sliding plate 61 through the engagement of the convex strip and the threaded groove. This rotation of the rotating drum 713 will then drive the rotating rod 71 to rotate. (See reference...) Figure 3 At this time, the rotating rod 71 will drive the pressure plate 73 to rotate in the bending direction of the test rod 4. At this time, the abutment plate 77 on the rotating rod 71 will abut against the upper end of the rotating plate 78. As the abutment plate 77 pushes the rotating plate 78 to rotate, the bottom end of the rotating plate 78 will push the square plate 712 to move in the bending direction of the test rod 4. At this time, the square plate 712 will drive the ring 710 to move through the telescopic rod 79. At this time, the ring 710 will push the spring between it and the pressure plate 73 to move. At this time, the spring will move in the bending direction of the test rod 4. During the movement, it will be bent, thereby testing the bending fatigue performance of the spring. Among them, reference Figure 3 The rotation of the rotating rod 71 within the second slide plate 610 is restricted to rotating backward, i.e., at the bent end of the test rod 4, but not forward.

[0024] In another embodiment of the present invention: the test rod 4 is L-shaped; The bent end of the test rod 4 is provided with an arc-shaped bend, which can be used to conduct fatigue tests on the bending performance of the spring material.

[0025] In another embodiment of the present invention: a displacement plate 75 is rotatably mounted on the bottom end of the fixed frame 76, and the top dimension of the displacement plate 75 is larger than the bottom dimension; The connecting plate 72 has a through hole, and a slide rod 74 is horizontally slidably installed inside the connecting plate 72. The pressure plate 73 and the slide rod 74 are fixedly connected. When the rotating rod 71 drives the connecting plate 72 to rotate, the through hole will move along the position plate 75. As the width of the position plate 75 gradually increases upwards, the two sliding rods 74 will be pressed and move away from each other. At this time, the two sliding plates will drive the two pressure plates 73 to move away from each other until the two sliding rods 74 move to the top of the position plate 75. At this time, the two sides of the position plate 75 no longer abut against the sliding rods 74, and the first spring is fixedly installed between the sliding rods 74 and the connecting plate 72. At this time, the first spring will push the two sliding rods 74 to reset, so that the two sliding rods 74 drive the two pressure plates 73 to slide and reset.

[0026] In another embodiment of the present invention: a chamfer is provided at the rear of the top end of the displacement plate 75; When the slide rod 74 moves above the position plate 75, and the rotating rod 71 rotates downwards to reset, the slide rod 74 will contact the chamfer at the top of the position plate 75. At this time, the slide rod 74 will push the position plate 75 to rotate forward. The position plate 75 will not affect the reset of the slide rod 74 until the slide rod 74 moves to the front of the bottom end of the position plate 75. At this time, the slide rod 74 separates from the position plate 75. At the same time, a second spring is fixedly installed between the position plate 75 and the fixed frame 76. At this time, the second spring will pull the position plate 75 to rotate and reset. When the connecting plate 72 rotates upwards, it will drive the ring 710 to move through the abutment plate 77. At this time, the ring 710 will push the spring on the test rod 4 to move, thereby conducting a bending fatigue test. When the ring 710 pushes the spring material to move, the pressure plate 73 does not need to apply pressure to the spring. Therefore, the two pressure plates 73 can open, thus moving away from the spring and the test rod 4. However, when the spring needs to be replaced, when the first push rod puts down a spring, when the spring moves to the bending end, it is easy to get stuck at the bending end. At this time, the stroke of the two pressure plates 73 rotating upwards is open. At this time, the two pressure plates 73 will be located outside the spring. When the slide rod 74 is above the displacement plate 75 and does not disengage from it, the two slide rods 74 will reset. At this time, the two pressure plates 73 will reset inwards, thereby clamping the upper spring. When the connecting plate 72 rotates downwards, the pressure plate 73 will drive the spring to move downwards. This can be repeated multiple times, so that the pressure plate 73 clamps the upper spring to the bottom end of the test rod 4.

[0027] In another embodiment of the present invention: a coil spring is installed between the rotating shaft 711 and the upright plate 5; The rotating plate 78 can be rotated and reset by means of a coil spring.

[0028] In another embodiment of the present invention: a first electric push rod 41 is fixedly installed on the test rod 4, and a second electric push rod is fixedly installed on the square plate 712, and the free end of the second electric push rod is fixedly connected to the telescopic rod 79; Several springs can be fitted onto the test rod 4. When testing one of them, the first electric push rod 41 extends into the surface of the test rod 4, which can block the spring above. After the test, the first electric push rod 41 retracts into the test rod 4, and at the same time the second electric push rod moves upward. At this time, the ring 710 will move upward, thus misaligning with the test rod 4. At this time, the spring at the bottom of the test rod 4 will slide down. The test rod 4 is set in an inclined L-shape, so that the bottom of the test rod 4 has a certain tilt angle, which facilitates the free sliding of the spring.

[0029] In another embodiment of the present invention: the test rod 4 is fixedly mounted on the top plate 3 by screws; The screws are inserted into the test rod 4 from the side wall of the top plate 3, thereby positioning the test rod 4 and tightening the connection.

[0030] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fatigue testing machine for materials used in the production of special equipment, characterized in that, Includes a base (1), on which a vertical pole (2) is fixedly installed, on which a top plate (3) is fixedly installed, and on which a plurality of test rods (4) are installed, wherein the test rods (4) are L-shaped; A first sliding plate (61) is provided on the base (1), and a servo motor (62) is fixedly installed on the first sliding plate (61). The output end of the servo motor (62) is provided with a forward and reverse conversion connection mechanism. A rotating cylinder (713) is installed on the first sliding plate (61), a friction wheel (68) is rotatably installed on the rotating cylinder (713), an abutment rod (69) is fixedly installed on the friction wheel (68), a fixing frame (76) is fixedly installed on the upright plate (5), and a fixing plate (761) is fixedly installed on the fixing frame (76). A rotating rod (71) is slidably installed inside the rotating cylinder (713). A connecting plate (72) is fixedly installed on the rotating rod (71). A pressure plate (73) is slidably installed on the connecting plate (72). A square plate (712) is slidably installed horizontally on the vertical plate (5). A telescopic rod (79) is slidably installed vertically on the square plate (712). A ring (710) is fixedly installed at the bottom end of the telescopic rod (79). The state of the second disk (65) is switched by the forward and reverse switching connection mechanism so that the second disk (65) can rotate or translate. During the rotation, the pressure plate (73) moves to perform a pressure fatigue test on the spring, while during the translation of the second disk (65), a bending fatigue test is performed on the spring.

2. The fatigue testing machine for materials used in the production of special equipment according to claim 1, characterized in that, The forward / reverse conversion connection mechanism includes a first disk (63) fixedly installed at the output end of the servo motor (62), a protrusion (64) fixedly installed on the first disk (63), a connecting frame (671) fixedly installed on the first slide plate (61), a limit rod (67) fixedly installed on the connecting frame (671), a second disk (65) installed on the limit rod (67), a connecting block (66) fixedly installed on the second disk (65), and a beveled edge provided on the connecting block (66).

3. The fatigue testing machine for materials used in the production of special equipment according to claim 2, characterized in that, A circular plate (681) is fixedly installed on the friction wheel (68).

4. The fatigue testing machine for materials used in the production of special equipment according to claim 3, characterized in that, It also includes a second slide plate (610), in which the rotating rod (71) is rotatably mounted; The rotating drum (713) has a threaded groove, and the inner wall of the first sliding plate (61) is fixedly installed with a protrusion, which extends into the threaded groove. An abutment plate (77) is fixedly installed on the rotating rod (71), a rotating shaft (711) is rotatably installed on the upright plate (5), and a rotating plate (78) is fixedly installed on the rotating shaft (711). The abutment plate (77) and the rotating plate (78) abut against each other.

5. A fatigue testing machine for materials used in the production of special equipment according to claim 4, characterized in that, The test rod (4) is L-shaped.

6. A fatigue testing machine for materials used in the production of special equipment according to claim 5, characterized in that, A displacement plate (75) is rotatably mounted on the bottom end of the fixed frame (76), and the top dimension of the displacement plate (75) is larger than the bottom dimension. The connecting plate (72) has a through hole, and a sliding rod (74) is horizontally slidably installed inside the connecting plate (72). The pressure plate (73) and the sliding rod (74) are fixedly connected.

7. A fatigue testing machine for materials used in the production of special equipment according to claim 6, characterized in that, The top rear of the displacement plate (75) is chamfered.

8. A fatigue testing machine for materials used in the production of special equipment according to claim 1, characterized in that, A coil spring is installed between the rotating shaft (711) and the upright plate (5).

9. A fatigue testing machine for materials used in the production of special equipment according to claim 1, characterized in that, A first electric push rod (41) is fixedly installed on the test rod (4), and a second electric push rod is fixedly installed on the square plate (712), with the free end of the second electric push rod and the telescopic rod (79) fixedly connected.

10. A fatigue testing machine for materials used in the production of special equipment according to claim 1, characterized in that, The test rod (4) is fixedly installed on the top plate (3) by screws.

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