Titanium alloy tensile test tool capable of being used in liquid nitrogen and liquid helium environments

Abstract

The utility model relates to the technical field of titanium alloy tensile test tools, in particular to a titanium alloy tensile test tool which can be used in liquid nitrogen and liquid helium environments. According to the technical scheme, the device comprises a low-temperature box used for manufacturing a liquid nitrogen and liquid helium ultralow-temperature environment; the titanium alloy workpiece is fed into the box top of the low-temperature box through vertical lifting; the workpiece clamping mechanism is installed at the bottom of the box top and used for fixing the titanium alloy workpiece. According to the utility model, liquid nitrogen, liquid helium and the like are filled into the low-temperature box to create an ultralow-temperature environment, titanium alloy can be fed into the low-temperature box through the vertical lifting function of the lifting mechanism to be subjected to a tensile property test in the ultralow-temperature environment, and when a workpiece is positioned outside the low-temperature box, the tensile property test in a conventional environment can be carried out; the device can be suitable for different test environment requirements; a plurality of workpiece clamping mechanisms are arranged, and the moving cylinder driving mechanism is combined with each workpiece clamping mechanism in different time periods to carry out testing.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium alloy tensile test tooling, in particular to a titanium alloy tensile test tooling which can be used in liquid nitrogen and liquid helium environments. Background Art

[0002] Titanium alloy tensile test fixture is a device that provides workpiece fixing and workpiece stretching functions in titanium alloy tensile tests. It is usually composed of workpiece fixing components and power equipment such as cylinders.

[0003] Existing titanium alloy tensile tests are usually conducted on workpieces in conventional environments, but the tensile properties of workpieces are affected by ultra-low temperature environments such as liquid nitrogen and liquid helium, so accurate test data cannot be obtained from tensile tests in conventional environments. To this end, the utility model proposes a titanium alloy tensile test tool that can be used in liquid nitrogen and liquid helium environments. Utility Model Content

[0004] The utility model aims to solve the problems existing in the background technology and proposes a titanium alloy tensile test tool which can be used in liquid nitrogen and liquid helium environments.

[0005] The technical solution of the utility model is a titanium alloy tensile test tool that can be used in a liquid nitrogen or liquid helium environment, comprising: a low temperature box for manufacturing a liquid nitrogen or liquid helium ultra-low temperature environment; a box top that is lifted vertically to send a titanium alloy workpiece into the low temperature box; and a workpiece clamping mechanism installed at the bottom of the box top to fix the titanium alloy workpiece.

[0006] Optionally, the workpiece clamping mechanism includes a clamping seat, a clamping plate assembly, a pull rod and a rod head clamp. The clamping plate assemblies are provided in a pair, one of which is fixedly connected to the bottom end of the clamping seat, and the other of which slides vertically along the clamping seat. The pull rod vertically moves through the top end of the clamping seat and the bottom end is fixedly connected to the sliding clamp assembly, and the top end of the pull rod is fixedly connected to the rod head clamp.

[0007] Optionally, the clamping plate assembly includes a clamping plate seat, a transverse screw shaft rotatably connected to the clamping plate seat at both ends, and a clamping plate threadedly connected to both ends of the transverse screw shaft respectively, and a sliding groove opening for translation of the clamping plate is opened on the upper surface of the clamping plate seat.

[0008] Optionally, it also includes a cylinder driving mechanism that drives one of the clamping plate assemblies to slide vertically, wherein the cylinder driving mechanism includes a cylinder frame and a cylinder fixedly mounted on the cylinder frame, and the bottom end of the piston rod of the cylinder is engaged with the rod head clamp.

[0009] Optionally, the workpiece clamping mechanism is provided with multiple ones, the upper surface of the box top is provided with a slide groove, the bottom of the cylinder frame is connected with a slider matching the slide groove, and the cylinder driving mechanism is moved to connect with the corresponding workpiece clamping mechanism through the sliding fit between the slider and the slide groove.

[0010] Optionally, it also includes a lifting mechanism that drives the box top to vertically lift.

[0011] Optionally, the lifting mechanism includes a support plate fixedly connected to the outer wall of the low-temperature box, an ear plate fixedly connected to the lower surfaces of both ends of the box top, a guide light rod connected to the support plate and movably passing through the ear plate, and a vertical screw shaft rotatably connected to the support plate and screwed with the ear plate thread.

[0012] Optionally, a through hole is formed at the top of the clamping seat for the pull rod to vertically pass through, a key bar is formed on the outer wall of the pull rod, and a key slot matching the key bar is formed at the through hole.

[0013] Compared with the prior art, the utility model has the following beneficial technical effects:

[0014] The present application creates an ultra-low temperature environment by injecting liquid nitrogen, liquid helium, etc. into the cryogenic box, and then the titanium alloy can be sent into the cryogenic box through the vertical lifting function of the lifting mechanism to perform tensile performance testing in the ultra-low temperature environment, and when the workpiece is located outside the cryogenic box, the tensile performance test can be performed in a conventional environment, that is, the device can be applied to different test environment needs;

[0015] Furthermore, since the tensile properties of titanium alloy workpieces are also affected by the length of time they stay in an ultra-low temperature environment, multiple workpiece clamping mechanisms can be set up to place multiple workpieces in a low temperature box at one time, and the mobile cylinder drive mechanism can be combined with each workpiece clamping mechanism at different time periods to test the workpieces fixed by the workpiece clamping mechanism, so that the performance data of the workpieces when they stay in an ultra-low temperature environment for different periods of time can be quickly obtained. Based on the above, more detailed test data can be obtained through this device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a titanium alloy tensile test fixture that can be used in liquid nitrogen and liquid helium ultra-low temperature environments;

[0017] Figure 2 for Figure 1 A cross-sectional view of

[0018] Figure 3 It is a schematic diagram of the connection between the workpiece clamping mechanism and the cylinder driving mechanism;

[0019] Figure 4 It is a structural schematic diagram of the splint assembly.

[0020] Reference numerals: 1. Low temperature box;

[0021] 2. Box top; 21. Slide;

[0022] 3. Workpiece clamping mechanism; 31. Clamping seat; 311. Through-hole; 32. Clamping plate assembly; 321. Clamping plate seat; 322. Transverse screw shaft; 323. Clamping plate; 33. Pull rod; 34. Rod head clamp;

[0023] 4. Cylinder driving mechanism; 41. Cylinder frame; 42. Cylinder;

[0024] 5. Lifting mechanism; 51. Support plate; 52. Guide light rod; 53. Vertical screw shaft; 54. Ear plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figure 1-4As shown, the present invention proposes a titanium alloy tensile test fixture that can be used in a liquid nitrogen or liquid helium environment, comprising: a cryogenic box 1 for manufacturing a liquid nitrogen or liquid helium ultra-low temperature environment, a box top 2 that is lifted vertically to send a titanium alloy workpiece into the cryogenic box 1, a workpiece clamping mechanism 3 installed at the bottom of the box top 2 to fix the titanium alloy workpiece, a cylinder driving mechanism 4 that drives one of the clamping plate assemblies 32 to slide vertically, and a lifting mechanism 5 that drives the box top 2 to lift vertically, as follows:

[0029] Liquid nitrogen, liquid helium, etc. can be filled into the cryogenic box 1 to create an ultra-low temperature environment. In addition, inlet and outlet pipes, valves and other structures can be set on the cryogenic box 1. Since it is a conventional technology and does not affect the implementation of this solution, it will not be described here.

[0030] refer to Figure 3-4 The workpiece clamping mechanism 3 includes a clamping seat 31, a clamping plate assembly 32, a pull rod 33 and a rod head clamp 34. The clamping plate assembly 32 is provided with a pair of upper and lower ones. The clamping plate assembly 32 located at the lower end is fixedly connected to the upper surface of the bottom end of the clamping seat 31. The clamping plate assembly 32 located at the upper end slides vertically along the clamping seat 31, and the clamping plate assembly 32 is fixedly connected to the bottom end of the pull rod 33. The pull rod 33 is vertically movable through a through hole 311 opened at the top end of the clamping seat 31, and the top end of the pull rod 33 is fixedly connected to the rod head clamp 34. In addition, a pair of key bars are provided on the outer wall of the pull rod 33, and a key slot matching the key bar is provided at the through hole 311. The pull rod 33 can only move vertically but cannot rotate by itself through the mutual engagement of the key bar and the key slot. The two clamping plate assemblies 32 each include a clamping plate seat 321, a transverse screw shaft 322 rotatably connected to the clamping plate seat 321 at both ends, and clamping plates 323 respectively screwed and connected to both ends of the transverse screw shaft 322. The upper surface of the clamping plate seat 321 is provided with a slide groove for the translation of the clamping plates 323. When the transverse screw shaft 322 is rotated, the screwed engagement between the transverse screw shaft 322 and the clamping plates 323 can drive the two clamping plates 323 to move in opposite directions to clamp or release one end of the titanium alloy workpiece.

[0031] refer to Figure 3 The cylinder drive mechanism 4 includes a cylinder frame 41 and a cylinder 42 fixedly mounted on the upper surface of the cylinder frame 41. The bottom end of the piston rod of the cylinder 42 can be horizontally moved to be engaged with the rod head clamp 34. Therefore, as the piston rod of the cylinder 42 is extended and retracted, the upper clamping plate assembly 32 can be driven to move vertically to stretch the workpiece.

[0032] In addition, in this embodiment, two rows of six workpiece clamping mechanisms 3 are provided, and each workpiece clamping mechanism 3 can be installed with a workpiece as described above. A slide groove 21 is provided on the upper surface of the box top 2, and a slider matching the slide groove 21 is connected to the bottom of the cylinder frame 41. The cylinder drive mechanism 4 can be moved to connect with the corresponding workpiece clamping mechanism 3 through the sliding fit between the slider and the slide groove 21, that is, when testing multiple workpieces at the same time, the test data of the workpieces staying in the low temperature box 1 for different time periods can be obtained according to the different connection times of the cylinder drive mechanism 4 and the workpiece clamping mechanism 3.

[0033] refer to Figure 1 The lifting mechanism 5 includes a support plate 51 fixedly connected to the outer wall of the end of the low temperature box 1, an ear plate 54 fixedly connected to the lower surface of the two ends of the box top 2, a guide light rod 52 connected to the support plate 51 and movably passing through the ear plate 54, and a vertical screw shaft 53 rotatably connected to the support plate 51 and threadedly engaged with the ear plate 54. When the vertical screw shaft 53 is rotated, the box top 2 can be driven to rise and fall vertically through the threaded engagement between the vertical screw shaft 53 and the ear plate 54, so that the workpiece can enter or escape from the low temperature box 1. In other embodiments, a motor can be added, and the motor output shaft is coaxially connected to the vertical screw shaft 53 to drive it to rotate automatically through the motor, which will not be described in detail here.

[0034] The working principle of this embodiment is as follows: the box top 2 is moved upward by the lifting function of the lifting mechanism 5, so that the workpiece clamping mechanism 3 is moved out of the low temperature box 1, and then the titanium alloy workpiece to be tested is installed on the workpiece clamping mechanism 3. The lifting mechanism 5 drives the workpiece clamping mechanism 3 to move downward, so that the workpiece enters the low temperature box 1. Then the piston rod of the cylinder driving mechanism 4 contracts, and the upper clamping plate assembly 32 is driven to move upward through the engagement of the protrusion at the end of the piston rod and the rod head clamp 34, so as to perform a tensile performance test on the workpiece in an ultra-low temperature environment.

[0035] In addition, the tensile properties of titanium alloy workpieces are also affected by the length of time they stay in the ultra-low temperature environment. In this embodiment, six workpiece clamping mechanisms 3 are arranged in two rows, and six workpieces can be installed at the same time. Since the cylinder drive mechanism 4 can be translated on the top of the box 2 to change its position, it is connected to the six workpiece clamping mechanisms 3 in turn for tensile testing, and the test result is the performance data of each workpiece under different lengths of stay in the low temperature box 1.

[0036] In summary, the device can not only perform tensile performance tests on titanium alloy workpieces under conventional conditions, but also perform tests in ultra-low temperature environments such as liquid nitrogen and liquid helium, and can test the performance data of the workpiece after it has stayed in this environment for different periods of time. Through the above-mentioned multiple tests, more detailed test data can be obtained.

[0037] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A titanium alloy tensile test tool that can be used in liquid nitrogen and liquid helium environments, characterized in that: include: A cryogenic box (1) for producing a liquid nitrogen or liquid helium ultra-low temperature environment; The titanium alloy workpiece is sent into a box top (2) in a low temperature box (1) by vertical lifting; A workpiece clamping mechanism (3) is installed at the bottom of the box top (2) and is used to fix the titanium alloy workpiece.

2. The titanium alloy tensile test tool that can be used in liquid nitrogen and liquid helium environments according to claim 1 is characterized in that: The workpiece clamping mechanism (3) comprises a clamping seat (31), a clamping plate assembly (32), a pull rod (33) and a rod head clamp (34), wherein the clamping plate assembly (32) is provided in a pair, wherein one of the clamping plate assemblies (32) is fixedly connected to the bottom end of the clamping seat (31), and the other of the clamping plate assemblies (32) slides vertically along the clamping seat (31), the pull rod (33) moves vertically through the top end of the clamping seat (31) and the bottom end is fixedly connected to the sliding clamp assembly (32), and the top end of the pull rod (33) is fixedly connected to the rod head clamp (34).

3. The titanium alloy tensile test tool that can be used in liquid nitrogen and liquid helium environments according to claim 2 is characterized in that: The clamping plate assembly (32) comprises a clamping plate seat (321), a transverse screw shaft (322) rotatably connected to the clamping plate seat (321) at both ends, and a clamping plate (323) respectively screwed together with the two ends of the transverse screw shaft (322), and a sliding groove opening for the clamping plate (323) to translate is provided on the upper surface of the clamping plate seat (321).

4. The titanium alloy tensile test tool that can be used in liquid nitrogen and liquid helium environments according to claim 3 is characterized in that: It also includes a cylinder drive mechanism (4) for driving one of the clamping plate assemblies (32) to slide vertically, the cylinder drive mechanism (4) including a cylinder frame (41) and a cylinder (42) fixedly mounted on the cylinder frame (41), the bottom end of the piston rod of the cylinder (42) being engaged and connected with the rod head clamp (34).

5. The titanium alloy tensile test tool that can be used in liquid nitrogen and liquid helium environments according to claim 4 is characterized in that: The workpiece clamping mechanism (3) is provided with a plurality of them, a slide groove (21) is provided on the upper surface of the box top (2), a slider matching the slide groove (21) is connected to the bottom of the cylinder frame (41), and the cylinder driving mechanism (4) is moved to be connected to the corresponding workpiece clamping mechanism (3) through the sliding fit between the slider and the slide groove (21).

6. The titanium alloy tensile test tool that can be used in liquid nitrogen and liquid helium environments according to claim 5, characterized in that: It also includes a lifting mechanism (5) for driving the box top (2) to vertically lift.

7. The titanium alloy tensile test tool that can be used in liquid nitrogen and liquid helium environments according to claim 6, characterized in that: The lifting mechanism (5) comprises a support plate (51) fixedly connected to the outer wall of the low-temperature box (1), ear plates (54) fixedly connected to the lower surfaces of both ends of the box top (2), a guide light rod (52) connected to the support plate (51) and movably passing through the ear plates (54), and a vertical screw shaft (53) rotatably connected to the support plate (51) and screwed with the ear plates (54).

8. The titanium alloy tensile test tool that can be used in liquid nitrogen and liquid helium environments according to claim 7, characterized in that: The top of the clamping seat (31) is provided with a through hole (311) for the pull rod (33) to vertically and movably pass through, the outer wall of the pull rod (33) is provided with a key bar, and the through hole (311) is provided with a key groove matching the key bar.

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