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Slotting cutter, equipment and slotting method for testing fracture toughness of graphite material

A graphite material and fracture toughness technology, applied in the field of slotting for graphite material testing, can solve the problems of inaccurate results, different groove sizes, and experimental errors in shapes, etc., and achieve the effects of precise structure, average stress, and improved reliability

Active Publication Date: 2018-08-28
赛迈科先进材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention provides a slotting tool, equipment and slotting method for testing the fracture toughness of graphite materials, by using a numerically controlled machine tool to cooperate with a specific slotting tool to perform automatic slotting of graphite material samples, instead of manual The method of slotting solves the problems of large experimental errors and inaccurate results caused by the inconsistent size and shape of the grooves used to test the fracture toughness, and effectively improves the experimental errors caused by the size and shape of the notch.

Method used

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  • Slotting cutter, equipment and slotting method for testing fracture toughness of graphite material
  • Slotting cutter, equipment and slotting method for testing fracture toughness of graphite material
  • Slotting cutter, equipment and slotting method for testing fracture toughness of graphite material

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Embodiment 1

[0058] Such as Figure 1 to Figure 4 Shown, a kind of notching tool for fracture toughness test of graphite material, comprising:

[0059] Knife handle 1, described knife handle 1 is cylindrically set, and it comprises clamping part 11 and connecting part 12 from top to bottom, and the diameter of described clamping part 11 is J, and length is K, and the diameter of described connecting part 12 The diameter is U and the length is M;

[0060] Blade 2, the blade 2 is concentrically arranged at the end of the connecting portion 12, it is integrally arranged with the connecting portion 12, and its diameter is P, its thickness is Q, the outer circumference of the working area 22 of the blade 2, etc. There are a number N tooth-shaped blades 21 with a tip height H distributed thereon, the relationship between the diameter P of the blade 2 and the number N of blades 21 satisfies: πP / 3≤N≤πP / 2;

[0061] The handle 1 rotates to drive the blade 2 to rotate synchronously, so that the bla...

Embodiment 2

[0096] Figure 5 It is a schematic diagram of a slotting tool for testing the fracture toughness of a graphite material according to the second embodiment of the present invention; Figure 5 As shown, the parts that are the same as or corresponding to those in the second embodiment are marked with the corresponding reference numerals of the first embodiment. For the sake of simplicity, only the differences from the first embodiment will be described below. This embodiment two and image 3 The difference of the shown embodiment one is:

[0097] Such as Figure 5 and Figure 6 As shown, the blade portion 21 of the working area 22 of the blade 2 is provided with steps, so that when the blade 2 cuts the graphite material, the graphite dust generated during the cutting process can be promptly and quickly discharged.

Embodiment 3

[0099] Referring to Embodiment 1, a slotting device of the present invention is described.

[0100] Such as Figure 15 and Figure 16 As shown, a slotting device includes a CNC machine tool 4 and a workbench 5, the spindle 41 of the CNC machine tool 4 is rotated, and the spindle 41 can be lifted and lowered, and the workbench 5 is arranged below the spindle 41 , which moves relative to the main shaft 41, and its upper end is detachably provided with a clamp 51, which clamps a vertically arranged graphite material sample 3, and also includes a graphite material fracture toughness in the first embodiment above. For a slotting tool for testing, the clamping part 11 of the handle 1 is detachably connected to the main shaft 41 coaxially, and the blade 2 is driven by the main shaft 41 to rotate, and the graphite material sample 3 is suspended outside the fixture 51 The part is grooved to form the detection groove 31 .

[0101] Wherein, any side where the length L and the thicknes...

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Abstract

The invention provides a slotting cutter, equipment and a slotting method for testing fracture toughness of a graphite material. The slotting cutter for testing the fracture toughness of the graphitematerial is included. The slotting cutter for testing the fracture toughness of the graphite material comprises a cutter handle and a blade. The cutter handle is coaxially connected with a main shaftof a numerical control machine tool, and the blade rotates to perform numerical control slotting on a graphite material sample clamped and fixed by a fixture on a worktable instead of manual slotting,the influence of manual slotting on the accuracy of the test results is avoided, the technical problem of inaccuracy, caused by manual slotting, of graphite material fracture toughness testing is solved, the consistency of graphite sample material slotting is ensured, and the testing accuracy of the graphite material sample during fracture toughness testing is improved; and besides the numericalcontrol machine tool drives the specific slotting cutter to perform full-automatic slotting on the graphite material sample, the slotting speed and efficiency of the slotting cutter are far higher than the speed of manual slotting, and the testing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of slotting for testing graphite materials, in particular to a slotting tool, equipment and a slotting method for testing the fracture toughness of graphite materials. Background technique [0002] Fracture toughness is a characterization of the ability of a material to prevent crack growth, and is a quantitative indicator of the toughness of a material. It is a constant for a certain material under the condition of constant loading speed and temperature. When the crack size is constant, the greater the fracture toughness value of the material, the greater the critical stress required for the crack to grow unstable; The critical size of the larger. Fracture toughness is a measure of the ability of a material to prevent the expansion of macroscopic crack instability, and it is also a toughness parameter for a material to resist brittle failure. It has nothing to do with the size and shape of the crack itse...

Claims

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Application Information

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IPC IPC(8): B28D1/18B28D7/00B28D7/04G01N1/28
CPCB28D1/18B28D7/00B28D7/04G01N1/286G01N2001/2873
Inventor 杨辉黄岱许汉春夏德祥
Owner 赛迈科先进材料股份有限公司
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