A tool for preparing polyurethane foam tensile strength test samples

Abstract

The utility model discloses a kind of preparation tool of polyurethane foam tensile strength test sample, including bottom plate, the baffle of being set in the both sides of bottom plate, the positioning combination board of being set on bottom plate several groups, the positioning combination board and two baffles are used to position sample blank, fixed device is set on two baffles, and the fixed device is used to fix sample blank.The utility model can effectively fix and position sample blank, ensure the machining accuracy of CNC milling cutter machine tool, and the accuracy of subsequent tensile strength test result is effectively guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of liquefied natural gas and relates to polyurethane foam tensile strength testing technology, specifically to a tooling for preparing polyurethane foam tensile strength test samples. Background Technology

[0002] LNG (liquefied natural gas) ships are vessels specifically designed for the storage and transportation of liquefied natural gas. They store liquefied natural gas through storage tanks, the inner chamber of which is composed of various modules (such as insulation modules and shielding modules). Both the insulation and shielding modules are composite board structures, with a polyurethane foam board in the middle layer. Due to the special properties of liquefied natural gas, the storage tanks need to have excellent sealing, insulation, and structural strength. The tensile strength of the polyurethane foam board is a very important indicator, so tensile strength testing of the polyurethane foam material is required to ensure that the tensile properties of the polyurethane foam board meet the requirements.

[0003] To meet the connection and testing requirements of a tensile strength testing machine, a test sample needs to be prepared first, and then tested using the machine to obtain tensile strength data. The existing method involves first cutting a square sample blank from polyurethane foam material, and then using a CNC milling machine to mill the sample blank to obtain the test sample.

[0004] However, due to the inability to effectively fix and position the sample blank, the CNC milling machine tool struggles to achieve precise machining, resulting in significant errors in the shape and size of the final test sample. This affects the accuracy of subsequent tensile strength test results and makes it difficult to achieve the desired test effect. Summary of the Invention

[0005] Purpose of the invention: In order to overcome the shortcomings of the existing technology, a tooling for preparing polyurethane foam tensile strength test samples is provided, which can effectively fix and position the sample blank, ensure the machining accuracy of the CNC milling machine, and effectively guarantee the accuracy of the subsequent tensile strength test results.

[0006] Technical solution: To achieve the above objectives, this utility model provides a tooling for preparing polyurethane foam tensile strength test samples, including a base plate, baffles disposed on both sides of the base plate, and several sets of positioning combination plates disposed on the base plate. The positioning combination plates and the two baffles are used to position the sample blank. Each of the two baffles is provided with a fixing device, which is used to fix the sample blank.

[0007] Furthermore, the positioning assembly plate consists of two positioning support plates, which are fixed to the base plate by screws.

[0008] Furthermore, the two positioning support plates of the positioning assembly plate are symmetrically arranged on the base plate.

[0009] Furthermore, a plurality of limiting blocks are provided on the inner side of the baffle, the limiting blocks being used to limit the sample blank.

[0010] Furthermore, the fixing device includes a cylinder, a connecting block connected to the cylinder, and a pressure block disposed on the connecting block.

[0011] Furthermore, one end of the connecting block is connected to the telescopic shaft of the cylinder, and the other end is connected to the pressure block.

[0012] Furthermore, an mounting plate is provided on the outer wall of the baffle, and the cylinder is mounted and fixed on the mounting plate.

[0013] Beneficial effects: Compared with the prior art, this utility model can effectively fix and position the sample blank, ensuring the machining accuracy of the sample blank by the CNC milling machine tool, solving the problem of large shape and size errors of existing test samples, and effectively ensuring the accuracy of subsequent tensile strength test results. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram illustrating the positioning and fixing of the sample blank according to this utility model;

[0016] Figure 3 This is a schematic diagram of the test sample on the preparation fixture. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0018] like Figure 1 and Figure 2As shown, this utility model provides a tooling for preparing polyurethane foam tensile strength test samples, including a base plate 1, baffles 2 disposed on both sides of the base plate 1, and two sets of positioning combination plates disposed on the base plate 1. The positioning combination plates are composed of two positioning support plates 3, which are fixed to the base plate 1 by screws. The two positioning support plates 3 are symmetrically disposed on the base plate 1, and the distance between the two positioning support plates 3 matches that of the sample blank 10. Each of the two baffles 2 is provided with a fixing device, which includes a cylinder 6, a connecting block 7, and a pressure block 8. One end of the connecting block 7 is connected to the telescopic shaft of the cylinder 6, and the other end is connected to the pressure block 8. An mounting plate 5 is disposed on the outer wall of the baffle 2, and the cylinder 6 is mounted and fixed on the mounting plate 5. A limit block 4 is disposed on the inner side of the baffle 2, which is used to limit the sample blank 10.

[0019] like Figures 1-3 As shown, in this embodiment, the above-mentioned preparation tooling is used to prepare test sample 11 for polyurethane foam tensile strength testing. The specific preparation process includes:

[0020] First, a square sample blank 10 is cut from polyurethane foam raw material. Two sample blanks 10 are stacked and placed between two positioning support plates 3 on the base plate 1. Then, the machining model 9 is placed on the sample blank 10. The purpose of the machining model 9 is to assist the CNC milling machine in machining the sample blank 10. The pressure block 8 is rotated above the machining model 9. The connecting block 7 and the pressure block 8 are moved down by the telescopic shaft of the cylinder 6 until the pressure block 8 presses down on the machining model 9, thus fixing the machining model 9 and the sample blank 10. Finally, the sample blank 10 is machined by the CNC milling machine to form the sample blank 10 as shown in the figure. Figure 3 The test sample 11 shown.

[0021] During the above preparation process, since the sample blank 10 is effectively positioned and fixed, the shape and size of the final test sample 11 have very high accuracy, and the accuracy of the subsequent tensile strength test results is effectively guaranteed.

Claims

1. A polyurethane foam tensile strength test sample preparation tooling characterized by, It includes a base plate, baffles on both sides of the base plate, and several sets of positioning combination plates on the base plate. The positioning combination plates and the two baffles are used to position the sample blank. Each of the two baffles is provided with a fixing device for fixing the sample blank.

2. A kit for preparing polyurethane foam tensile strength test samples according to claim 1, wherein, The positioning assembly plate consists of two positioning support plates, which are fixed to the base plate by screws.

3. A kit for preparing polyurethane foam tensile strength test samples according to claim 2, wherein, The two positioning support plates of the positioning assembly plate are symmetrically arranged on the base plate.

4. The polyurethane foam tensile strength test sample preparation kit of claim 1, wherein, The inner side of the baffle is provided with several limiting blocks, which are used to limit the sample blank.

5. The preparation fixture for a polyurethane foam tensile strength test sample according to claim 1, characterized in that, The fixing device includes a cylinder, a connecting block connected to the cylinder, and a pressure block disposed on the connecting block.

6. A kit for preparing polyurethane foam tensile strength test specimens according to claim 5, wherein, One end of the connecting block is connected to the telescopic shaft of the cylinder, and the other end is connected to the pressure block.

7. The tooling for preparing a polyurethane foam tensile strength test sample according to claim 5, characterized in that, An mounting plate is provided on the outer wall of the baffle, and the cylinder is mounted and fixed on the mounting plate.

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