Machining center machine tool special for metal bar impact sample

Abstract

The utility model discloses a special machining center machine tool for a metal bar impact sample, which comprises a suspension and an impact hammer, the impact hammer is mounted in the suspension through a guide rod in a lifting manner, an elastic force accumulation acceleration impact mechanism is arranged between the upper part of the impact hammer and the inner top surface of the suspension, and the elastic force accumulation acceleration impact mechanism comprises an elastic body; according to the machining center machine tool special for the metal bar impact sample, when an impact hammer moves upwards to make contact with a lower ring, a spring is compressed upwards, elastic potential energy of the spring is accumulated, and impact acceleration is conducted on the impact hammer when the impact hammer naturally falls by means of the elastic potential energy accumulated through compression of the spring, so that the impact hammer naturally falls by means of gravity; the impact force generated by the falling of the impact hammer is increased due to the fact that the impact force generated by the falling of the impact hammer is also exerted on the impact force generated by the falling of the impact hammer, so that the suspension with the same height can be used for an impact test with larger impact force, or a drop hammer impact testing machine with the same impact force can be used for a lower design height of the suspension used in the application.

Description

Technical Field

[0001] The utility model relates to the technical field of drop hammer impact testing machines, in particular to a special processing center machine tool for metal bar impact test specimens. Background Art

[0002] In factories that produce metal bars, pendulum or drop-weight impact testers are often used to test the physical properties of the finished bars. Generally, a drop-weight impact tester uses a hammer of a certain mass to freely fall at a certain height to impact the sample, and collects data after the hammer impacts the sample at a high rate and synchronously, so as to analyze the impact resistance of the sample and the damage and fracture status of the sample.

[0003] From the above, it can be seen that the impact force required for the drop weight impact tester to perform the impact test mainly depends on the gravitational potential energy of the hammer head, that is, the greater the impact force required for the drop weight impact tester experiment, the higher the height the hammer head needs to rise, and the higher and larger the size of the suspension that guides the hammer head to rise. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that the greater the impact force required for the drop hammer impact tester experiment, the higher the height the hammer head needs to rise, the higher the suspension for guiding the hammer head to rise, and the larger the size, and proposes a special processing center machine tool for metal bar impact specimens.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A special machining center machine tool for metal bar impact specimens comprises a suspension and an impact hammer. The impact hammer is installed in the suspension by means of a guide rod for lifting and lowering. An elastic force accumulation acceleration impact mechanism is arranged between the upper part of the impact hammer and the inner top surface of the suspension. The elastic force accumulation acceleration impact mechanism comprises an elastomer. When the elastomer is compressed between the inner top surface of the suspension and the impact hammer, it is used to accumulate elastic potential energy to accelerate the impact hammer when it falls.

[0007] Preferably, the elastic body is specifically composed of a spring, and the elastic force accumulation acceleration impact mechanism also includes an upper inner ring and a lower ring, and the upper inner ring and the lower ring are respectively fixedly installed on the upper and lower ends of the spring.

[0008] Preferably, an upper outer ring is arranged on the periphery of the upper inner ring, and the upper outer ring is mounted on the inner top surface of the suspension through a plurality of movable bolts.

[0009] Preferably, the movable bolt includes a cylinder, a limiting ring and a screw rod, the limiting ring is fixedly installed on the lower end of the cylinder, the screw rod is fixedly installed on the upper end of the cylinder, the cylinder passes upward through the upper outer ring, the screw rod is threadedly connected to the inner top surface of the suspension, and the limiting ring and the lower surface of the upper outer ring are in contact with each other.

[0010] Preferably, a bearing is fixedly provided on the periphery of the cylinder, the bearing is provided at the lower end of the limiting ring, the outer ring of the bearing is provided on the lower surface of the upper inner ring, and the lower end of the cylinder is provided with a through hole.

[0011] Preferably, a high-precision micro force sensor is fixedly mounted on the upper inner ring.

[0012] Compared with the prior art, the utility model provides a special processing center machine tool for metal bar impact specimens, which has the following beneficial effects:

[0013] The special processing center machine tool for metal bar impact specimens compresses the spring upward when the impact hammer moves up to contact the lower ring, accumulates the elastic potential energy of the spring, and uses the elastic potential energy accumulated by the compression of the spring to perform impact acceleration on the impact hammer when it falls naturally, so that while the impact hammer falls naturally due to gravity, it is also subject to the reaction elastic force of the spring that accumulates the elastic potential energy, thereby increasing the impact force generated by the fall of the impact hammer, so that the same height of the suspension can be used for impact tests with greater impact force, or for the drop hammer impact tester with the same large impact force, the height of the suspension design used in the present application can be lower and the size can be smaller, which can be convenient for installation and placement in a low-height room, and can save manufacturing materials and costs for manufacturing the suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a special machining center machine tool for metal bar impact specimens proposed by the utility model;

[0015] Figure 2 This is a structural schematic diagram of a spring force accumulation acceleration impact mechanism in a special processing center machine tool for metal bar impact specimens proposed by the utility model;

[0016] Figure 3 The utility model discloses a partial cross-sectional view of the structural schematic diagram of a special machining center machine tool for metal bar impact specimens.

[0017] In the figure: 1. suspension; 2. elastic force accumulation acceleration impact mechanism; 21. upper inner ring; 22. upper outer ring; 23. spring; 24. lower ring; 25. movable bolt; 251. cylinder; 252. bearing; 253. limit ring; 254. screw; 255. perforation; 26. high-precision micro force sensor; 3. impact hammer. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] Reference Figure 1-3 A special processing center machine tool for metal bar impact specimens relates to a drop hammer impact testing machine, including a suspension 1 and an impact hammer 3. The impact hammer 3 is installed in the suspension 1 through a guide rod. As is known to all, when the drop hammer impact testing machine performs an impact test on a metal bar specimen, it mainly utilizes other power sources such as a traction machine or a hydraulic cylinder to pull the impact hammer 3 upward to accumulate gravitational potential energy, and then cooperates with the impact force generated by the natural fall of the impact hammer 3 to perform an impact test on the metal bar specimen.

[0021] In this embodiment, an elastic force accumulation acceleration impact mechanism 2 is installed on the inner top surface of the suspension 1. The elastic force accumulation acceleration impact mechanism 2 includes an upper inner ring 21, an upper outer ring 22, an elastomer, a lower ring 24 and a plurality of movable bolts 25. The elastomer is specifically composed of a spring 23. The upper inner ring 21 and the lower ring 24 are respectively fixedly installed on the upper and lower ends of the spring 23. The upper inner ring 21 is coaxially rotatably installed in the inner ring of the upper outer ring 22. A circle of fine gaps is reserved between the outer wall of the upper inner ring 21 and the inner wall of the upper outer ring 22 to facilitate the smooth installation of the upper inner ring 21 in the inner ring of the upper outer ring 22. The upper inner ring 21 and the upper outer ring 22 are fixedly installed on the inner top surface of the suspension 1 by a plurality of movable bolts 25.

[0022] It should be added that the movable bolt 25 is composed of a cylinder 251, a bearing 252, a stop ring 253 and a screw 254. The stop ring 253 and the inner ring of the bearing 252 are coaxially fixedly installed on the periphery of the cylinder 251. The stop ring 253 is arranged on the periphery of the bearing 252. The screw 254 is coaxially fixedly installed on the top of the cylinder 251. The lower end of the cylinder 251 is provided with a through hole 255. The through hole 255 is used to insert a crowbar whose inner diameter is smaller than the inner diameter of the through hole 255, so as to facilitate the rotation and twisting of the bolt at the upper end.

[0023] It is further supplemented that a circular hole adapted to the cylinder 251 is provided on the upper outer ring 22, and the cylinder 251 and the screw 254 pass through the circular hole from bottom to top. The inner diameter of the limit ring 253 is larger than the inner diameter of the circular hole and cannot pass through the circular hole. The screw 254 is threadedly connected to the inner top surface of the suspension 1 and is provided on the lower surface of the upper outer ring 22. Figure 3 The outer ring of the bearing 252 is in contact with the lower surface of the upper inner ring 21. The outer ring of the bearing 252 does not contact the lower surface of the upper outer ring 22 under the isolation of the limit ring 253. As is well known, the inner and outer rings of the bearing 252 are connected in a low-damping rotational connection. Therefore, when the outer ring of the bearing 252 is in squeeze contact with the upper inner ring 21, it will not affect the rotation of the cylinder 251 and the screw 254 in the inner ring, and they continue to be tightened on the lower surface of the upper outer ring 22.

[0024] It should be added that a high-precision micro force sensor 26 of model AT8103 is fixedly installed on the upper inner ring 21. After the upper inner ring 21 is fixed, the sensing end of the high-precision micro force sensor 26 and the inner top surface of the suspension 1 are in contact with each other to monitor the elastic force accumulated in the lower end spring 23.

[0025] In this embodiment, when the metal bar impact specimen special processing center machine tool is used to perform an impact test on the metal bar specimen, the impact hammer 3 can not only use the gravity potential energy accumulated by its own upward movement to perform a natural drop test on the metal bar specimen like a traditional drop hammer impact tester, but also can compress the spring 23 upward when the impact hammer 3 moves upward to contact the lower ring 24, accumulate the elastic potential energy of the spring 23, and use the elastic potential energy accumulated by the compression of the spring 23 to perform impact acceleration when the impact hammer 3 falls naturally, so that the impact hammer 3 can also fall naturally by gravity. The reaction force of the spring 23 for accumulating elastic potential energy increases the impact force generated by the falling of the impact hammer 3, that is, when the elastomer is compressed between the inner top surface of the suspension 1 and the impact hammer 3, it is used to accumulate elastic potential energy to accelerate the falling of the impact hammer 3, so that the suspension 1 of the same height can be used for impact tests with greater impact force in this application; or, for a drop hammer impact tester with the same large impact force, the height of the suspension 1 used in this application can be designed to be lower, which can be convenient for installation and placement in a low-height room, and can save the manufacturing materials and costs of the suspension 1.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A special machining center machine tool for metal bar impact specimens, comprising a suspension (1) and an impact hammer (3), wherein the impact hammer (3) is installed in the suspension (1) by means of a guide rod, and is characterized in that: An elastic force accumulation acceleration impact mechanism (2) is arranged between the upper part of the impact hammer (3) and the inner top surface of the suspension (1). The elastic force accumulation acceleration impact mechanism (2) comprises an elastic body. When the elastic body is compressed between the inner top surface of the suspension (1) and the impact hammer (3), it is used to accumulate elastic potential energy to accelerate the impact hammer (3) when it falls.

2. A metal bar impact specimen processing center machine tool according to claim 1, characterized in that: The elastic body is specifically composed of a spring (23), and the elastic force accumulation acceleration impact mechanism (2) also includes an upper inner ring (21) and a lower ring (24), and the upper inner ring (21) and the lower ring (24) are respectively fixedly installed on the upper and lower ends of the spring (23).

3. A metal bar impact specimen processing center machine tool according to claim 2, characterized in that: An upper outer ring (22) is arranged on the periphery of the upper inner ring (21), and the upper outer ring (22) is mounted on the inner top surface of the suspension (1) via a plurality of movable bolts (25).

4. The metal bar impact specimen processing center machine tool according to claim 3 is characterized in that: The movable bolt (25) comprises a cylinder (251), a limiting ring (253) and a screw rod (254); the limiting ring (253) is fixedly mounted on the lower end of the cylinder (251); the screw rod (254) is fixedly mounted on the upper end of the cylinder (251); the cylinder (251) passes upward through the upper outer ring (22); the screw rod (254) is threadedly connected to the inner top surface of the suspension (1); and the limiting ring (253) and the lower surface of the upper outer ring (22) are in contact with each other.

5. A metal bar impact specimen processing center machine tool according to claim 4, characterized in that: A bearing (252) is fixedly arranged on the periphery of the cylinder (251), the bearing (252) is arranged at the lower end of the limiting ring (253), the outer ring of the bearing (252) is arranged on the lower surface of the upper inner ring (21), and a through hole (255) is arranged at the lower end of the cylinder (251).

6. A metal bar impact specimen processing center machine tool according to claim 5, characterized in that: A high-precision micro force sensor (26) is fixedly mounted on the upper inner ring (21).

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