Method for determining thicknesses of gaskets for assembling roll to bearing pedestal

A method for determining bearing housings, which is applied to the rigid support of bearing components, bearing elements, shafts and bearings, etc., can solve the problems of low efficiency, unsafe and cumbersome bearing housing components and rolls, etc., and achieve simplified assembly steps, The effect of reducing repeated hoisting and improving assembly efficiency

Inactive Publication Date: 2018-09-18

BENGANG STEEL PLATES

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AI-Extracted Technical Summary

Problems solved by technology

[0004] If the assembly journal of the bearing seat assembly is assembled according to the above-mentioned conventional method, it is cumbersome and inefficient. In addition, it is not safe to lift the bearing seat assembly and the roll for many times. The root cause of the multiple lifting of the bearing seat assembly during ...

Abstract

The invention provides a method for determining thicknesses of gaskets for assembling roll to bearing pedestal. The method comprises the following steps that (1) the thickness of the radial gasket isdetermined, concretely, a bearing is assembled in the bearing pedestal, a bearing gland is mounted, and a bolt is fastened by a ''finger tightening'' method, the distance between each of different points on the bearing gland and the end face of the bearing pedestal is measured, and a mean value is taken and is the thickness of the radial gasket; and (2) the thickness of the axial gasket is determined, concretely, by measuring the width of a bearing inner ring and the length of a to-be-assembled roll neck, the thickness of the desired axial gasket is determined, and the nominal axial gasket thickness Ta is equal to W-L+G, wherein W is the width of the bearing inner ring, L is the length of the to-be-assembled roll neck, and G is the specified axial clearance during design. The gasket thicknesses can be determined directly through measurement and simple operation without hoisting the bearing pedestal or the roll.

Application Domain

Measurement devicesBearing unit rigid support

Technology Topic

Mechanical engineering

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Examples

Experimental program(1)

Example Embodiment

[0019] Example

[0020] A cold-rolled galvanizing line wet finishing machine is a single-stand four-high rolling mill, and the bearing adopts single-stand galvanized finishing machine bearings. The radial and axial spacers are determined as follows:

[0021] The axial gap G given in the design is 0.2~0.4, and the intermediate value 0.3 is used in the calculation. The range of λ is 0.063~0.12 after calculation and statistics, and the unit of all involved values is mm.

[0022] (1) Assemble the lower box on the operating side of the support roller

[0023] Box No.: 23569090 2#013-2

[0024] Rack position: under the operating side

[0025] Roll number: B04-006

[0026] Bearing number: CZ2641461-004

[0027] Original width of bearing inner ring: 480.135

[0028] a. Assemble the bearing in the bearing housing, install the bearing gland, and use the "finger tight" method to tighten the bolts.

[0029] b. Measure the distance between the gland and the end face of the bearing seat, measuring 6 points: 11.25; 11.27; 11.28; 11.25; 11.26; 11.22; take the average value of 11.26.

[0030] The thickness of the radial gasket outside grinding: 11.26, tolerance -0.03~-0.05.

[0031] c. Measure the width of the bearing inner ring W: 480.04; measure the length of the roll journal on the operating side

[0032] L:474.21

[0033] d. Nominal axial gasket thickness: Ta=W-L+G=480.04-474.21+0.3=6.13

[0034] e. After installing the radial gasket, the bearing seat needs to be tightened with bolts. The reduction in the width of the bearing inner ring is between 0.063 and 0.12, which is 0.07.

[0035] The grinding thickness of the axial gasket is T=Ta-λ=6.13-0.07=6.06, and the tolerance is -0.01~+0.01.

[0036] Verify the calculation results: After the bearing seat assembly is assembled with the roll neck, measure the distance from the end face of the inner ring of the bearing seat to the journal, and measure 4 points to get the average value.

[0037] Axial dimension: 5.7; 5.8; 5.73; 5.72; average value 5.74.

[0038] Axial clearance:

[0039] 6.13-5.74=0.39

[0040] 6.06-5.74=0.32

[0041] After assembly, the nominal axial gasket thickness Ta and axial gasket T meet the axial clearance requirements given by the design.

[0042] ⑵Assemble the lower box of the supporting roller transmission side

[0043] Box No.: 23569091 2#01-2

[0044] Frame position: under the drive side

[0045] Roll number: B04-006

[0046] Bearing number: CZ2635506-003

[0047] Original width of bearing inner ring: 479.864

[0048] a. Assemble the bearing in the bearing housing, install the bearing gland, and use the "finger tight" method to tighten the bolts.

[0049] b. Measure the distance between the gland and the end face of the bearing seat, measuring 6 points: 10.93; 10.93; 10.98; 10.95; 10.95; 10.95; take the average value of 10.95.

[0050] The thickness of the radial gasket is 10.95 and the tolerance is -0.03~-0.05.

[0051] c. Measure the width of the bearing inner ring W: 479.77; measure the length of the roller journal on the operating side L: 474.28

[0052] d. Nominal axial gasket thickness: Ta=W-L+G=479.77-474.28+0.3=5.79

[0053] e. The reduction of bearing inner ring width is between 0.063 and 0.12, which is 0.09.

[0054] The grinding thickness of the axial gasket is T=Ta-λ=5.79-0.09=5.7, and the tolerance is -0.01~+0.01.

[0055] Verify the calculation results: After the bearing seat assembly is assembled with the roll neck, measure the distance from the end face of the inner ring of the bearing seat to the journal, and measure 4 points to get the average value.

[0056] Axial dimension: 5.4; 5.4; 5.45; 5.38; average value 5.41

[0057] Axial clearance:

[0058] 5.79-5.41=0.38

[0059] 5.7-5.41=0.29

[0060] After assembly, the nominal axial gasket thickness Ta and the axial gasket thickness T meet the axial clearance requirements given by the design.

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Classification and recommendation of technical efficacy words

Simplified assembly steps
Improve assembly quality

Method for determining thicknesses of gaskets for assembling roll to bearing pedestal

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

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Description & Claims & Application Information

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