for TM1 Drive Beam girder Design review V Soldatov BERFMK 27052015 General requirements PETS Short PETS DB Quad EPUCRET Girder Drift tube DB Quad Sliding support Fixed support ID: 780859
Download The PPT/PDF document "Adjustable V-shaped support" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Adjustable V-shaped support
for TM1 Drive Beam girder Design review
V. Soldatov, BE-RF-MK
27.05.2015
Slide2General requirements
PETS
Short PETS
DB Quad
EPUCRET Girder
Drift tube
DB Quad
Sliding
support
Fixed
support
PETS compact coupler
Totally 5 types of clamping:
- 2 different fixed clamps;
- 3 different sliding clamps.
TM1 layout
2
V.
Soldatov
, BE-RF-MK
Slide3General requirements. Tolerances
Tolerances on the girder
EPUCRET Girder
210
70
Ref. surface A
Ref. surface B
0.02 A B
DB axis
Ø 0.02
PETS
Perpendicularity of surfaces A and B (see picture on the left):
0.02 mm
Flatness of the contact surfaces:
0.01 mm
Roughness of the contact surfaces:
0.2 µm
3
V.
Soldatov
, BE-RF-MK
0.1
LAB
0.1
Slide4Current solution (non-adjustable)
4
Clamping. Sliding type.Type A. Strap with ball-head screws
Type B.
Spring
Type D.
Bracket
Type E.
Strap
Type C. Strap with ball-head screws
Clamping. Fixed type.
V.
Soldatov
, BE-RF-MK
Slide52 ways of adjustment
5Simple movement
V.
Soldatov
, BE-RF-MK
z
y
Existing market solutions for lifting the weight of 50 kg range with high precision are too bulky or/and too expensive.
Composite movement
z
y
cancelled
Easier to find on the market adjustment solutions, but there is an issue with the friction in the point B.
B
A
Slide6Adjustable solutions #1 “Rail”
Adjustment
Blocking
Runner
Adjustment screw
Rail
45˚ wedge
Pin
Jaw
6
V.
Soldatov
, BE-RF-MK
Slide7Adjustable solutions #1: Rail
Assembly
About Bosch Rexroth Ball Rail System
7
V.
Soldatov
, BE-RF-MK
Slide8Adjustable solutions #1: Rail
8
V. Soldatov, BE-RF-MK
Sizing options
Size 15
Size 9
Size 12
Size 9
Size 15
Static load capacity
2100 N
3900 N
Stat. torsional moment load
9.6 Nm39 Nm
Slide99
Adjustable solutions #1: Rail
Estimation of using the solution #1
t
ogether with SAS
Slide10Adjustable solutions #1v2: Slide
10V. Soldatov, BE-RF-MK
30˚
Static load capacity
180 N
Stat. torsional
m
oment load
2 Nm
Stroke
5 mm
Slide11Adjustable solutions #2: “Plunger”
Adjustment
Plunger
Guide (Pin, standard)
Adjustment screw
Cu hub
for low friction
304L
Set screw M4
for blocking
11
V.
Soldatov
, BE-RF-MK
Slide12Adjustable solutions #2: “Plunger”
Assembly
Single piece machined support
12
V.
Soldatov
, BE-RF-MK
Slide13Adjustable solutions #3: Flexture
13V. Soldatov, BE-RF-MK
Pros:
Absolut repeatability
Very high precision
No maintenance needed, solid piece
Cons:
Require EDM (wire cutting) which is expensive and time consuming
Very short
stroke (within the elastic limit)
Slide14Versions history
Slide15Pros and Cons
#1 Rail#2 Plunger
The resolution of adjustment is the same (by order of magnitude): 254 μ/rev
Smooth reliable movement (due to
ind.
solution)
Comparatively easy assembly, less parts
Heavy duty capability
Need no maintenance
Maintenance (nominal at given conditions)
Almost all the
load is taken by the adjustment screw. The load capacity limit is 90 N.Comparatively
complex assemblyComparatively
complex machining15
V. Soldatov, BE-RF-MK
Slide16Adjustable V-shaped Support for BPM
16
Side lock
Ball head
V.
Soldatov
, BE-RF-MK
Slide17Adjustment Screw
17
Newport Miniature Adjustment Screws
Model
AJS8-100-0.5H
AJS254-0.5H-NL
Adjustment Screw Thread
100 TPI (254 u/rev)
254 TPI (100 u/rev)
Drive Type
Hex
Hex
Travel
0.50 in. ( 12.7 mm)
0.50 in. ( 12.7 mm)
Load Capacity
10 lb ( 45 N)
20 lb ( 90 N)
Lock
Side Lock
Side Lock
AJS8-100-0.5H
V.
Soldatov
, BE-RF-MK