A band saw blade fatigue testing device

Abstract

The present disclosure provides a band saw blade fatigue test device, comprising: a loading platform, the top side of which is upwardly convex and formed with two pads, and each pad is fixedly connected with a piston cylinder one, the top side of the loading platform is oppositely provided with two elastic rods, a piston rod one is slidably arranged in the piston cylinder one, and one end of the elastic rod is fixedly connected with the corresponding piston rod one; a clamping piece is arranged at the other end of the corresponding elastic rod for clamping and positioning the band saw blade; an air inlet mechanism is arranged on the outer peripheral wall of the first end of the piston cylinder one for adjusting the air inlet pressure in the piston cylinder one. The improved band saw blade fatigue test device can well simulate the different pulling forces on the band saw blade during the fatigue test of the band saw blade, and will not affect the repeated bending force of the cutting material on the band saw blade, can better simulate the state of the band saw blade under different force conditions, and has good fatigue test effect.

Description

Technical Field

[0001] This utility model relates to the technical field of band saw blade fatigue testing devices, specifically to a band saw blade fatigue testing device. Background Technology

[0002] A band saw blade is a cutting tool consisting of a tough, sharp-toothed metal strip tensioned within a frame. It is widely used in the processing of metals, wood, and composite materials. During the production of band saw blades, fatigue tests are typically conducted using a band saw blade testing machine to ensure the quality of the produced band saw blades.

[0003] Existing band saw blade testing machines typically perform fatigue tests by reproducing the sawing process through the reciprocating movement of the band saw blade. The testing machine usually has a reciprocating tension mechanism to drive the band saw blade to move back and forth, which cannot effectively simulate the band saw blade being subjected to different tensile forces, resulting in poor fatigue test results. Utility Model Content

[0004] The purpose of this invention is to provide a fatigue testing device for band saw blades, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a band saw blade fatigue testing device, comprising: a platform, the top side of which protrudes upward to form two pads, and each pad is fixedly connected to a piston cylinder; two elastic rods are provided opposite to each other on the top side of the platform; a piston rod is slidably installed inside the piston cylinder, and one end of the elastic rod is fixedly connected to the corresponding piston rod. A clamping component, located at the other end of the corresponding elastic rod, is used for clamping and positioning the band saw blade; The intake mechanism is located on the outer peripheral wall of the first end of the piston cylinder and is used to adjust the intake pressure inside the first piston cylinder. The gas extraction mechanism is located at the tail end of piston cylinder one and is used to extract gas from piston cylinder one.

[0006] Preferably, the clamping member includes a clamping block, which is fixedly connected to the other end of the corresponding elastic rod, and bolts are threaded through both sides of the clamping block.

[0007] Preferably, the intake mechanism includes a circular tube, which is fixedly installed on the outer peripheral wall of the first end of the corresponding piston cylinder. A limiting ring is fixedly installed inside the circular tube, a sealing plate is provided on the bottom side of the limiting ring, and an elastic element is provided in the opening at the top end of the circular tube. An electrically controlled valve is connected to the outer peripheral wall of the first end of the piston cylinder, and the electrically controlled valve is located below the corresponding circular tube.

[0008] Preferably, the elastic element includes a piston cylinder two, which is fixedly installed in the top opening of the round tube by a plurality of connecting rods and is filled with air. A piston rod two is slidably installed in the bottom opening of the piston cylinder two, and the bottom end of the piston rod two is fixedly connected to the corresponding sealing plate.

[0009] Preferably, a piston plate is provided above the piston rod 2, and the outer peripheral wall of the piston plate is in contact with the inner wall of the corresponding piston cylinder 2. A stud is installed in the internal thread of the top opening of the piston cylinder 2, and the bottom end of the stud is rotatably connected to the corresponding piston plate.

[0010] Preferably, the air extraction mechanism includes an air pump located below the tail end of the piston cylinder, and the air pump is fixedly connected to the platform. An electrically controlled three-way valve is fixedly installed in the opening at the tail end of the piston cylinder, and the air inlet of the air pump is connected to the corresponding end of the corresponding electrically controlled three-way valve through a connecting pipe.

[0011] Preferably, a support ring is fixedly installed inside the piston cylinder, and the support ring is located between the piston plate and the round tube of the piston rod.

[0012] This utility model has the following beneficial effects: This improved band saw blade fatigue testing device can effectively simulate different tensile forces on the band saw blade during fatigue testing, without affecting the repeated bending force exerted on the band saw blade by the cutting material. It can better simulate the state of the band saw blade under different forces, and the fatigue test results are good. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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 based on these drawings without creative effort.

[0014] Figure 1 This is a perspective view of the overall structure of this utility model; Figure 2 This is a perspective view of the overall structure of part of the piston cylinder and part of the elastic rod of this utility model; Figure 3 This is a front view of the internal structure of a piston cylinder of this utility model; Figure 4 This is a perspective view of the internal structure of the circular tube of this utility model; Figure 5 This is a perspective view of the internal structure of the platform of this utility model.

[0015] The reference numerals in the attached figures are as follows: 1. Platform; 2. Piston cylinder one; 3. Piston rod one; 4. Elastic rod; 5. Clamping component; 51. Clamping block; 52. Bolt; 6. Air intake mechanism; 61. Round tube; 62. Limiting ring; 63. Sealing plate; 64. Elastic component; 641. Piston cylinder two; 642. Piston rod two; 643. Piston plate; 644. Stud; 7. Air extraction mechanism; 71. Air pump; 72. Electrically controlled three-way valve; 8. Support ring. Detailed Implementation

[0016] 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.

[0017] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 according to the specific circumstances.

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] See also Figure 1 , Figure 2 Figure 3As shown, according to an embodiment of the present invention, a fatigue testing device for band saw blades is provided, comprising: a platform 1, which has two pads protruding upward on its top side, and a piston cylinder 2 is fixedly connected to each pad; two elastic rods 4 are provided opposite to each other on the top side of the platform 1; a piston rod 3 is slidably installed inside the piston cylinder 2; and one end of the elastic rod 4 is fixedly connected to the corresponding piston rod 3. Clamping component 5, which is located at the other end of the corresponding elastic rod 4, is used for clamping and positioning the band saw blade; The intake mechanism 6 is located on the outer peripheral wall of the piston cylinder 2 at the front end and is used to adjust the intake pressure inside the piston cylinder 2. The gas extraction mechanism 7 is located at the tail end of the piston cylinder 2 and is used to extract gas from the piston cylinder 2.

[0021] In this embodiment, when using the improved band saw blade fatigue testing device, please refer to... Figure 5 As shown, a recessed cavity is formed in the middle of the top side of the stage 1. A pneumatic telescopic rod is fixedly installed inside the cavity, and a base is provided at the top of the pneumatic telescopic rod. The cutting material is fixedly installed inside the base by adhesive or clamping structure. The top opening of the cavity can be set to be an opening where the inner wall fits against the cutting material to enhance the stability of the cutting material. A control host with a screen is fixedly installed on the stage 1 for controlling the operation of the device. Please refer to [reference needed]. Figure 1 and Figure 2 As shown, the band saw blade is first clamped and fixed by the clamping parts 5 from both ends. Then, the pneumatic telescopic rod drives the cutting material to fit against the saw teeth of the blade with corresponding force. Subsequently, the air extraction mechanism 7 is activated to intermittently extract the gas in the piston cylinder 2, thereby pulling the band saw blade back and forth through the piston rod 3 and the elastic rod 4 to perform the cutting operation of the material. When the piston rod pulls the band saw blade to move, the air intake pressure in the piston cylinder 2 is adjusted by the air intake mechanism 6, so that a negative pressure chamber of corresponding strength is formed in the piston cylinder 2 that is gradually away from the band saw blade, thereby applying a resistance of corresponding magnitude to the moving band saw blade. This process is repeated until the fatigue test of the band saw blade is completed. During the reciprocating movement of the band saw blade, as the band saw blade deflects and bends, the elastic rod 4 synchronously follows and undergoes corresponding bending deformation, which will not affect the repeated bending force exerted by the cutting material on the band saw blade when the band saw blade is cutting the material. In summary, this improved band saw blade fatigue testing device can effectively simulate different tensile forces on the band saw blade during fatigue testing, without affecting the repeated bending force exerted on the band saw blade by the cutting material. It can better simulate the state of the band saw blade under different forces, and the fatigue test results are good.

[0022] In a further preferred embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the clamping member 5 includes a clamping block 51, which is fixedly connected to the other end of the corresponding elastic rod 4. Bolts 52 are threaded through both sides of the clamping block 51. In this embodiment, please refer to Figure 2 As shown, when installing the band saw blade, the operator inserts both ends of the band saw blade into the mounting grooves of the clamping blocks 51. The bottom and opposite sides of the clamping blocks 51 are provided with rectangular mounting grooves. Then, the bolts 52 are tightened so that the bolts 52 and the band saw blade come into contact with each other, which generates a great friction between the band saw blade and the clamping blocks 51. Alternatively, the bolts can pass through the holes at both ends of the band saw blade to finally complete the connection and fixation between the two ends of the band saw blade and the two clamping blocks 51. The band saw blade installation operation is simple.

[0023] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the intake mechanism 6 includes a circular tube 61, which is fixedly installed on the outer peripheral wall of the corresponding piston cylinder 2. A limiting ring 62 is fixedly installed inside the circular tube 61. A sealing plate 63 is provided on the bottom side of the limiting ring 62. An elastic element 64 is provided in the opening at the top of the circular tube 61. An electrically controlled valve 65 is connected to the outer peripheral wall of the piston cylinder 2, and the electrically controlled valve 65 is located below the corresponding circular tube 61; In this embodiment, please refer to Figure 2 , Figure 3 and Figure 4 As shown, when piston rod 3 slides out of piston cylinder 2, the electrically controlled valve opens so that the air inside the front end of piston cylinder 2 can be discharged normally, so as to avoid the formation of a high-pressure chamber inside piston cylinder 2 when piston rod slides out of piston cylinder 2, which would affect the use of the device. It should be noted that during the above process, due to the pulling of the elastic element 64 on the sealing plate 63, the sealing plate 63 and the limiting ring 62 collide with each other, which can block the opening of the round tube 61 so that all the gas can be discharged from the electric control valve. When piston rod 3 retracts into piston cylinder 2, the electronically controlled valve closes. As piston rod 3 moves, the interior of piston cylinder 2 expands due to the increased space, creating a negative pressure. This results in a pressure difference on both sides of sealing plate 63. When the suction force of the negative pressure on sealing plate 63 in piston cylinder 2 is greater than the pulling force of elastic element 64 on sealing plate 63, sealing plate 63 separates from limiting ring 62. At this time, external gas flows into the interior of piston cylinder 2 through the gap between circular tube 61 and limiting ring 62 and sealing plate 63 to replenish the gas lost in piston cylinder 2. This creates a stable negative pressure chamber of corresponding strength inside the interior of piston cylinder 2, thereby applying a corresponding pulling force to the band saw blade.

[0024] In a further preferred embodiment of this utility model, such as Figure 4 As shown, the elastic element 64 includes a piston cylinder 641, which is fixedly installed in the top opening of the round tube 61 by a number of connecting rods and is filled with air. A piston rod 642 is slidably installed in the bottom opening of the piston cylinder 641, and the bottom end of the piston rod 642 is fixedly connected to the corresponding sealing plate 63. In this embodiment, please refer to Figure 4 As shown, during the use of the device, the amount of gas filled in piston cylinder 2 641 is relatively small, which creates a negative pressure chamber inside piston cylinder 2 641. The negative pressure chamber inside piston cylinder 2 641 applies a corresponding pulling force through piston rod 2 642. There are no elastic elements inside the device, so the device has a long service life.

[0025] In a further preferred embodiment of this utility model, such as Figure 4 As shown, a piston plate 643 is provided above the piston rod 642, and the outer peripheral wall of the piston plate 643 is in contact with the inner wall of the corresponding piston cylinder 641. A stud 644 is threaded into the top opening of the piston cylinder 641, and the bottom end of the stud 644 is rotatably connected to the corresponding piston plate 643. In this embodiment, please refer to Figure 4 As shown, after the band saw blade is installed, the operator turns the stud 644, thereby driving the piston plate 643 to move back and forth in the piston cylinder 641 to adjust the distance between the piston plate 643 and the piston rod 642, thereby adjusting the strength of the negative pressure chamber in the piston cylinder 641, and adjusting the tension on the sealing plate 63. This ensures that external gas will flow into the piston cylinder 2 when the sealing plate 63 is subjected to a corresponding pressure difference, and finally adjusts the tension on the band saw blade so that the device can adapt to fatigue tests of various tensile forces pulling the band saw blade. It should be noted that the stud 644 can be transparent and has a scale rod fixed inside, so that the position of the piston plate 643 can be quickly adjusted.

[0026] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 3 As shown, the air extraction mechanism 7 includes an air pump 71, which is located below the tail end of the piston cylinder 2. The air pump 71 is fixedly connected to the platform 1. An electrically controlled three-way valve 72 is fixedly installed in the opening at the tail end of the piston cylinder 2. The air inlet end of the air pump 71 is connected to the corresponding end of the corresponding electrically controlled three-way valve 72 through a connecting pipe. In this embodiment, please refer to Figure 1 , Figure 2 and Figure 3As shown, when piston rod 3 slides out of piston cylinder 2, the electrically controlled three-way valve 72 is activated, making the rear of piston cylinder connected to the outside, so that when piston rod 3 slides out of piston cylinder 2, a negative pressure chamber will not be formed in the rear of piston cylinder 2, affecting the use of the device. When piston rod 3 retracts into piston cylinder 2, the electrically controlled three-way valve 72 is activated, connecting the rear end of piston cylinder 2 to the air inlet of air pump 71 via a connecting pipe. Simultaneously, air pump 71 is activated, continuously drawing gas from the rear end of piston cylinder 2 through the connecting pipe to create a negative pressure chamber, thereby gradually pulling piston rod 3 into piston cylinder 2. The device has a high degree of automation.

[0027] In a further preferred embodiment of this utility model, such as Figure 3 As shown, a support ring 8 is fixedly installed inside the piston cylinder 2, and the support ring 8 is located between the plug plate of the piston rod 3 and the round tube 61. In this embodiment, please refer to Figure 3 As shown, during the reciprocating movement of the piston plate 643 within the piston cylinder 2, the support ring 8 can isolate the piston rod 3 from contact with the round tube 61 and the electrically controlled valve, so as to avoid the piston rod 3 from colliding with the round tube 61 or the electrically controlled valve, which could damage the round tube 61 or the electrically controlled valve and affect the use of the device.

[0028] Working principle: By controlling the host, the air pump 71 is operated intermittently, thereby the reciprocating movement of the band saw blade through the cooperation of piston cylinder 2 and piston rod 3, cutting the material to simulate the stress situation when the band saw blade is in use, thus conducting a fatigue test on the band saw blade.

[0029] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0030] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this 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 this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A fatigue testing device for band saw blades, characterized in that, include: The platform (1) has two pads protruding upward on its top side, and a piston cylinder (2) is fixedly connected to each pad. Two elastic rods (4) are provided opposite to each other on the top side of the platform (1). A piston rod (3) is slidably installed inside the piston cylinder (2), and one end of the elastic rod (4) is fixedly connected to the corresponding piston rod (3). Clamping member (5), which is located at the other end of the corresponding elastic rod (4), is used for clamping and positioning the band saw blade; The intake mechanism (6) is located on the outer peripheral wall of the first end of the piston cylinder (2) and is used to adjust the intake pressure inside the piston cylinder (2); The gas extraction mechanism (7) is located at the tail end of the piston cylinder (2) and is used to extract the gas inside the piston cylinder (2); The intake mechanism (6) includes a round tube (61), which is fixedly installed on the outer peripheral wall of the first end of the corresponding piston cylinder (2). A limiting ring (62) is fixedly installed inside the round tube (61). A sealing plate (63) is provided on the bottom side of the limiting ring (62). An elastic element (64) is provided in the opening at the top of the round tube (61). An electrically controlled valve (65) is connected to the outer peripheral wall of the first end of the piston cylinder (2), and the electrically controlled valve (65) is located below the corresponding circular tube (61).

2. The band saw blade fatigue testing device according to claim 1, characterized in that: The clamping member (5) includes a clamping block (51), which is fixedly connected to the other end of the corresponding elastic rod (4), and bolts (52) are threaded through both sides of the clamping block (51).

3. The band saw blade fatigue testing device according to claim 2, characterized in that: The elastic element (64) includes a piston cylinder (641), which is fixedly installed in the top opening of the round tube (61) by several connecting rods and is filled with air. A piston rod (642) is slidably installed in the bottom opening of the piston cylinder (641), and the bottom end of the piston rod (642) is fixedly connected to the corresponding sealing plate (63).

4. The band saw blade fatigue testing device according to claim 3, characterized in that: A piston plate (643) is provided above the piston rod (642), and the outer peripheral wall of the piston plate (643) is in contact with the inner wall of the corresponding piston cylinder (641). A stud (644) is installed in the internal thread of the top opening of the piston cylinder (641), and the bottom end of the stud (644) is rotatably connected to the corresponding piston plate (643).

5. The band saw blade fatigue testing device according to claim 4, characterized in that: The air extraction mechanism (7) includes an air pump (71), which is located below the tail end of the piston cylinder (2), and the air pump (71) is fixedly connected to the platform (1). An electrically controlled three-way valve (72) is fixedly installed in the opening at the tail end of the piston cylinder (2), and the air inlet of the air pump (71) is connected to the corresponding end of the corresponding electrically controlled three-way valve (72) through a connecting pipe.

6. The fatigue testing device for band saw blades according to claim 5, characterized in that: A support ring (8) is fixedly installed inside the piston cylinder (2), and the support ring (8) is located between the plug plate and the round tube (61) of the piston rod (3).

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