Rubber roller wear machine DIN testing | Инструменты

DIN wear test machine Rubber rotary roll wear test machine DIN wear machine rubber wear meter Product specification classification: A:Wear test machine sandpaper B:Wear tester cutter C:Wear tester D:DIN wear testing machine E:Electronic balance 0.01 F:DIN wear full set + balance scale

 

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First, use: l This machine is suitable for the wear resistance of elastic materials, rubber, tires, conveyor belts, soles, soft synthetic leather and other materials. Second, the principle: l Under the specified contact pressure and a given area, the sample is at an angle to the sandpaper to determine the wear of the sample on a certain level of sandpaper. l The sandpaper bag is attached to the surface of the roller, and the sample is pressed against the roller with sandpaper to move the sample laterally along the roller. The abrasion is generated at one end of the cylindrical sample, and the quality loss value of the sample is measured. The density of the sample is calculated by volumetric wear. Third, according to the standard: l This test machine meets the requirements of DIN-53516, ISO/DIS-4649, BS903 PART9 and GB-9867. Fourth, the instrument description:

 

Project

specification

Test load

2.5N ±0.2N 5 N ±0.2N

Jig lateral displacement

4.2±0.04mm/roller per turn

Roller diameter

Φ(150 ±0.2)mm

Wheel length

460mm

Roller speed

40±1r.p.m

Wear stroke

40m (20m) is equivalent to the number of roller rings 84 (42)

Wear rate

0.32m/sec

inclination

3° (the angle between the test piece holder and the vertical surface of the roller)

Volume (about)

70cm × 30cm × 30cm

Weight (about)

61kg

power supply

1∮ AC 220V 3A (by country or designated)

Five, instrument installation 1. Power supply conditions: : Please configure the correct power supply according to the nameplate on the machine.

! Danger ■ The input voltage error range should be within ±10% and the machine should be properly grounded to prevent the machine from being grounded. Leakage causes damage.   2, operating environment requirements: temperature 23 ± 2 ° C humidity 60 ± 5% 3, the instrument needs to be placed on a level desktop. Six, operating specifications   1. Prepare the test piece: 1. Prepare the standard glue: 1.1 Confirm that the standard glue is within the validity period, otherwise it cannot be used. 1.2 The size specification of standard glue is: Φ16mm, thickness is more than 6mm.

【Note】 ■ Standard glue can be molded by standard mold or drilled with DIN drill, and the test piece cannot be punched out. ■ The standard glue can be glued to a material with a thickness of about 3mm and a hardness of not less than 80IRHD and Φ16mm (such as Resin glue). This will help the standard glue to be fixed on the chuck while increasing the use time of the standard glue.

 

2. Test piece production:

2.1 The size of the test piece is: Φ16mm, thickness 2mm~14mm.

【Note】 ■ The test piece can be taken with a DIN drill or standard mold, and the test piece cannot be punched out. ■ The thickness of the test piece is not less than 2mm. ■ The test piece thickness is greater than 2mm and less than 6mm, with a suitable adhesive, sticking to a hardness of not less than 80IRHD, Φ16mm material (such as resin glue), make the thickness greater than 6mm but their total thickness is not Can exceed 14mm. ■ If the test material is loose and empty, it is best to stick a hardness of not less than one on each cut test piece. 80IRHD, Φ16mm material (such as resin glue). This allows the test piece to be firmly fixed to the chuck. On the top, the test pieces will not deform on the chuck, but their total thickness cannot exceed 14mm. ■ The above are the recommended standards. Please refer to the relevant standards for details. 2.2 Standard state of the test piece: Before the test, it is placed at a temperature of 23 °C ± 2 °C, and the relative temperature is 65 ± 2% for more than 48 hours. 2.3. Number of test pieces: Three or more pieces of the same material should be tested.   2. Operation steps: 1. Replace sandpaper:    1.1 Take a sandpaper with a length of 473±1mm and a width of at least 400mm but not exceeding the length of the roller. The average thickness is about 1.0±0.2mm.    1.2 Take three double-sided adhesives with the same length, no more than 0.2mm thick and 25-50mm wide, evenly added on the surface of the drum, and each double-sided adhesive should be parallel to the axis of the roller.    1.3 When fixing the sandpaper, the direction of the arrow on the back of the sandpaper should be toward the back of the machine. It must be tightly attached to the roller. The front and rear ends of the sandpaper must be aligned and parallel to the axis of the roller.    1.4 When the two ends of the sandpaper are bonded and the gap is less than 2mm, they cannot be overlapped.    1.5 After the replacement of the sandpaper, it is necessary to grind the sandpaper one or two times with a metal piece (with no load) (the operation method is as follows).

【Note】 ■ One of the double-sided tapes is glued at both ends of the sandpaper. ■ The roller must be kept clean and free of dust. When replacing old sandpaper, remove the double-sided tape from the roller. ■ The sandpaper after grinding is clean. 2. Using standard glue to correct the amount of sandpaper abrasion between 180mg~220mg is as follows: 2.1 Lift the entire bracket up (Figure 3).

2.2 clamping standard glue 2.2.1 Loosen the nut counterclockwise, then the collet will become larger as shown in Figure 4. The standard glue (the standard glue can be used last time, as long as its thickness or standard glue on the standard glue material) The thickness is greater than 6mm~14mm) can be placed in the chuck, press the test piece and lock the nut clockwise as shown in Figure 5. Audition Nut Chuck

  

2.2 Place the metal thickness block on the standard plastic chuck. Adjust the bolt as shown in Fig. 6 in clockwise or counterclockwise direction so that the standard glue is parallel to the metal thickness block (so that the standard glue exposes the chuck about 2mm).

3, Move the entire bracket to the starting point position and place it on the screw gear as shown in Figure 8.    2.4 Place the 2.5N, 5.0N weight on the load block as shown in Figure 9.

2.5. Start the test: 2.5.1 Connect the correct power supply, turn on (power button) and press (test button) to pre-grind the yarn to make the pre-grinding of the test paper (about pre-grinding to half of the whole stroke, press (stop button) to stop. Standard glue as a mark). 2.5.2 Remove the standard glue from the chuck, remove the residual rubber particles on the surface, and weigh it with the balance (W1) to the nearest 0.1 mg. 2.5.3 Return the entire bracket to the starting point and re-clamp the test piece weighed in section 2.5.2. 2.5.4 Press (test button) again to start grinding to 40m (about 84 turns), that is, press the (stop button) after the whole stroke of the machine. 2.5.5 Remove the standard glue from the chuck, remove the residual rubber particles on the surface, and weigh it again with the balance (W2) to the nearest 0.1mg.

【Note】 ■ Clean the sandpaper with a brush while grinding. ■ When testing, the screw will be loosened as shown in Figure 9. If it is locked, it cannot rotate.

2.5.6 Test at least three standard gels and take the average value.

2.5.7 Calculate the loss of standard rubber wear by the following formula: Q=W1(20M)-W2(40M) ■ Analyze the loss of standard rubber wear and determine whether the abrasion of sandpaper is between 180mg and 220mg. ■ If the abrasion amount of the sandpaper is more than 220mg, the sandpaper is too thick, and the sandpaper must be used again. Grinding once (without load), after grinding, the dust on the sandpaper must be removed, and then the standard glue is used in the above manner until the wear loss reaches the standard.   If the abrasion of the sandpaper is less than 180mg, the new sandpaper must be replaced.   3. Test the test piece: 3.1 After learning the wear loss of the standard glue, the test piece can be tested. 3.2 Test the weight of the test piece (method such as the standard glue operation method), test three test pieces, take the average. 3.3 Calculate the wear loss of the test piece: △m=the weight of the test piece pre-grinding - the weight of the whole stroke of the test piece. 3.4 Measure the density (S) of the test piece with a specific gravity balance. (Note: The specific gravity of the balance should be self-contained!!) 1.5 After the test is over, turn off the power. Third, the result of the judgment: The value is substituted into the following formula to calculate the test piece wear amount A (mm3).   △m ×200mg         Q ×S      A =   Description: △m: test piece wear loss       Q: Standard rubber wear loss (mg).       S: Specific gravity of the test piece (mg/mm3). Note:      1. Due to the low wear resistance of the test materials (such as small particle rubber, EVA and polyether polyurethane), you can reduce 10.0 ± 0.2N Less than 5.0 ± 0.1N; at the same time reduce the number of revolutions from 84 to 42 or 21 material and sandpaper relative displacement is about 20m or 10m. Sample wear amount by 2 or 4, but the method used in the report.      2. If the test piece does not rotate, remove the gear as shown in Figure 6, replace it with the round wheel attached to the company and fix the chuck. Figure 9 locking screw.