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A testing method for end face breaking strength of filled plastic irregular parts and a testing device
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A testing device, a technology of filling plastic, applied in the measuring device, using a stable tension/pressure test material strength, strength characteristics, etc., to prevent slippage and ensure accuracy
Inactive Publication Date: 2016-04-20
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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There is no suitable method and fixture for testing before this work is carried out
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Embodiment 1
[0031] Embodiment 1: as image 3 As shown, the present invention includes an upper pull-press mechanism and a pull-down press mechanism that are nested in each other, and an upper mold 6 and a lower mold 8 are respectively arranged on the lower platen 2 of the upper pull-press mechanism of the sleeve section and the upper platen 4 of the pull-down pressure mechanism. The part 7 to be tested is placed between the upper die 6 and the lower die 8, and the ends of the two tension and compression mechanisms are respectively connected to the universal testing machine. During the test, the bottom end of the part 7 to be tested is installed on the lower die 8, and the open end is in contact with the upper die 6 , Compress the part to be tested 7.
[0032] The upper pulling and pressing mechanism includes a lower pressing plate 2, an upper support plate 5 and a stud 3, the lower pressing plate 2 is provided with a lower die 8, one end of the stud 3 is connected to the lower pressing pl...
Embodiment 2
[0046] Embodiment 2: the difference between this example and embodiment 1 is: as Figure 4 As shown, the radial width D1 of the groove I9 on the upper mold in this example, that is, the distance D1 between the inner diameter of the groove I9 and the inner diameter of the through hole I10 is 1.3.
[0047] Such as Figure 5 As shown, the radial width D2 of the groove II12 in the lower die, that is, the distance between the inner diameter of the groove II12 and the inner diameter of the through hole II11 is 0.8 mm, and the depth of the groove II is 2.0 mm.
[0048]Embodiment 2: the difference between this example and embodiment 1 is: as Figure 4 As shown, the radial width D1 of the groove I9 on the upper mold in this example, that is, the distance D1 between the inner diameter of the groove I9 and the inner diameter of the through hole I10 is 11.5 mm.
[0049] Such as Figure 5 As shown, the radial width D2 of the groove II12 in the lower die, that is, the distance be...
Embodiment 3
[0050] Embodiment 3: the difference between this example and embodiment 1 is: as Figure 4 As shown, the radial width D1 of the groove I9 on the upper mold in this example, that is, the distance D1 between the inner diameter of the groove I9 and the inner diameter of the through hole I10 is 1.4 mm.
[0051] Such as Figure 5 As shown, the radial width D2 of the groove II12 in the lower die, that is, the distance between the inner diameter of the groove II12 and the inner diameter of the through hole II11 is 1.0 mm, and the depth of the groove II is 3.0 mm.
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Abstract
The invention provides a testing method for end face breaking strength of filled plastic irregular parts and a testing device, and belongs to the technical field of applications of nonmetal materials used for aero-engines. The testing device comprises an upper pulling and pressing mechanism and a lower pulling and pressing mechanism which are in a sleeve joint. An upper pressing plate and a lower pressing plate in a sleeved section are respectively provided with an upper mold and a lower mold. A part to be tested is put between the upper mold and the lower mold. End faces of the two pulling and pressing mechanisms are connected to universal testing machines. During testing, the bottom cylinder end of the part to be tested is mounted to the lower mold, an open end of the part to be tested is in contact with the upper mold and the part to be tested is tightly pressed. The testing method and the testing device overcome the problem that mechanical properties of graphite-filled polyimide plastic moldings cannot be tested, ensure testing accuracy of the end face breaking strength, and meet a requirement for simultaneously examining moulded manufacturability of materials and parts.
Description
technical field [0001] The invention belongs to the technical field of application of non-metallic materials for aero-engines, and in particular relates to a testing method and testing device for the end surface fracture strength of filled plastic shaped parts. Background technique [0002] Aeroengines use a large number of graphite-filled high-temperature-resistant engineering plastic parts. The inner diameter of the parts is matched with the shaft, and the outer diameter and end face are matched with the casing to work at high temperatures. [0003] Under normal circumstances, such parts are usually made of graphite-filled resin powder, molded into rods, and then machined. When evaluating material properties, samples can be taken from the rods for testing. However, the parts used are polyimide filled with a certain proportion of graphite powder and molded directly. If the performance of the same batch of plates is examined separately, the strength of the parts and the stab...
Claims
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