Wear On Filed PTFE Alloy Bearings Lab Report
Experimental Research of Wear On Filled PTFE Alloy Bearings
ABSTRACT: Because of the lower coefficient of friction and good strength to weight ratio features polymer based composites are frequently used. In this work, experimental investigations were conducted on wear behavior of PTFE composite radial bearings filled with 15% glass fiber (GF15), 40 % bronze (B40) and 35% carbon (C35) where bearing loads, sliding distances and wear were taken into account. For the fact that pivot pins have their own working principle, individual test equipment was designed to research wear behavior of pivot pin bearings. The results achieved from tests are shown graphically and checked against each other. According to the results, it was considered that film …show more content…
It is revealed in the other studies that the friction coefficient is dependent on the load [13-17.
Dry friction condition could be necessary some application because of contamination and the difficulty of maintenance. This work is mainly focused on the tribological behaviour of reinforced PTFE materials to understand of the mechanisms involved in friction and wear of the polymers in lack of a lubricant [3].
2 EXPERIMENTAL PROCEDURES
2.1 Testing set
Test equipment like pin-on-disk, block-on-ring etc. is used generally in tribological studies. Wear act of pivot pin bearings studied in this manuscript cannot be fully investigated in terms of the way it works with this test equipment. For this reason, individual test equipment was designed (Fig.1) to research wear behaviour of pivot pin bearings. Fig. 1 Experimental Equipment; 1) Kentledge, 2) Air operated cylinder, 3) Digital meter, 4) Connecting fitting, 5) Loading sleeve, 6) Hatch, 7) Load piece, 8) Roller
The test apparatus showed in figure 2 works as follows:
• The test samples are placed on mechanism seen in Figure …show more content…
Fig. 2 Schematic design of test apparatus; 1) Kentledge, 2) Air operated cylinder, 3) Digital meter, 4) Plumb axle, 5) Contact breaker, 6) Connecting fitting, 7) Loading hatch, 8) Hatch, 9) Load piece, 10) Roller Fig. 3 Design of the connecting fitting, 1) Bearing cage, 2) Pivot pin, 3) Plumb axle, 4) Samples, 5) Main tube, 6) setscrew, 7) Pin coop, 8) Stud
2.2 Tested materials
In this work, tribological effects of loads and sliding distances on wear of filled PTFE bearing have been investigated.
Test materials are produced as follows: the PTFE powder is blended together with filled materials, to obtain an indiscrete status, and then is formed neath load. Hereafter the material be exposed to sintering process. Then left to cool. The samples produced are machined to desired dimensions by CNC lathes. Fig. 4 Sizes of test samples a) pivot pin (AISI 1040), b) PTFE bearings (reinforced)
Properties of the specimens used are offered in Table 1.
Table 1. Broad property of test samples
Property Unit B40 C35 GF15
Bronze Ratio (%) 40 -
ABSTRACT: Because of the lower coefficient of friction and good strength to weight ratio features polymer based composites are frequently used. In this work, experimental investigations were conducted on wear behavior of PTFE composite radial bearings filled with 15% glass fiber (GF15), 40 % bronze (B40) and 35% carbon (C35) where bearing loads, sliding distances and wear were taken into account. For the fact that pivot pins have their own working principle, individual test equipment was designed to research wear behavior of pivot pin bearings. The results achieved from tests are shown graphically and checked against each other. According to the results, it was considered that film …show more content…
It is revealed in the other studies that the friction coefficient is dependent on the load [13-17.
Dry friction condition could be necessary some application because of contamination and the difficulty of maintenance. This work is mainly focused on the tribological behaviour of reinforced PTFE materials to understand of the mechanisms involved in friction and wear of the polymers in lack of a lubricant [3].
2 EXPERIMENTAL PROCEDURES
2.1 Testing set
Test equipment like pin-on-disk, block-on-ring etc. is used generally in tribological studies. Wear act of pivot pin bearings studied in this manuscript cannot be fully investigated in terms of the way it works with this test equipment. For this reason, individual test equipment was designed (Fig.1) to research wear behaviour of pivot pin bearings. Fig. 1 Experimental Equipment; 1) Kentledge, 2) Air operated cylinder, 3) Digital meter, 4) Connecting fitting, 5) Loading sleeve, 6) Hatch, 7) Load piece, 8) Roller
The test apparatus showed in figure 2 works as follows:
• The test samples are placed on mechanism seen in Figure …show more content…
Fig. 2 Schematic design of test apparatus; 1) Kentledge, 2) Air operated cylinder, 3) Digital meter, 4) Plumb axle, 5) Contact breaker, 6) Connecting fitting, 7) Loading hatch, 8) Hatch, 9) Load piece, 10) Roller Fig. 3 Design of the connecting fitting, 1) Bearing cage, 2) Pivot pin, 3) Plumb axle, 4) Samples, 5) Main tube, 6) setscrew, 7) Pin coop, 8) Stud
2.2 Tested materials
In this work, tribological effects of loads and sliding distances on wear of filled PTFE bearing have been investigated.
Test materials are produced as follows: the PTFE powder is blended together with filled materials, to obtain an indiscrete status, and then is formed neath load. Hereafter the material be exposed to sintering process. Then left to cool. The samples produced are machined to desired dimensions by CNC lathes. Fig. 4 Sizes of test samples a) pivot pin (AISI 1040), b) PTFE bearings (reinforced)
Properties of the specimens used are offered in Table 1.
Table 1. Broad property of test samples
Property Unit B40 C35 GF15
Bronze Ratio (%) 40 -