SCHUNK ROTA THW3 Operation manual

Translation of Original Operating Manual
Power Lathe Chuck with Jaw Quick-change
ROTA THW3
Assembly and Operating Manual
Superior Clamping and Gripping

Imprint
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Imprint
Copyright:
This manual is protected by copyright. The author is SCHUNK GmbH & Co. KG. All rights
reserved.
Technical changes:
We reserve the right to make alterations for the purpose of technical improvement.
Document number: 1440828
Version: 03.00|22/07/2021|en
Dear Customer,
thank you for trusting our products and our family-owned company, the leading
technology supplier of robots and production machines.
Our team is always available to answer any questions on this product and other solutions.
Ask us questions and challenge us. We will find a solution!
Best regards,
Your SCHUNK team
H.-D. SCHUNK GmbH & Co.
Spanntechnik KG
Lothringer Str. 23
D-88512 Mengen
Tel. [phone]
Fax [phone]
[email protected]
schunk.com
Customer Management
Tel. [phone]
Fax [phone]
[email protected]
Please read the operating manual in full and keep it close to the product.

Table of Contents
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A THW3 |en
3
Table of Contents
1
General .................................................................................................................... 5
1.1
About this manual .................................................................................................... 5
1.1.1
Presentation of Warning Labels.................................................................... 5
1.1.2
Applicable documents................................................................................... 6
1.1.3
Sizes............................................................................................................... 6
1.2
Warranty................................................................................................................... 6
1.3
Scope of Delivery...................................................................................................... 7
2
Basic safety notes .................................................................................................... 8
2.1
Intended use............................................................................................................. 8
2.2
Not intended use ...................................................................................................... 8
2.3
Constructional changes ............................................................................................ 9
2.4
Spare parts................................................................................................................ 9
2.5
Chuck jaws ................................................................................................................ 9
2.6
Environmental and operating conditions............................................................... 10
2.7
Personnel qualification........................................................................................... 11
2.8
Personal protective equipment.............................................................................. 12
2.9
Notes on safe operation......................................................................................... 12
2.10
Transport ................................................................................................................ 13
2.11
Malfunctions........................................................................................................... 13
2.12
Disposal................................................................................................................... 13
2.13
Fundamental dangers............................................................................................. 14
2.13.1
Protection during handling and assembly .................................................. 14
2.13.2
Protection during commissioning and operation ....................................... 15
2.13.3
Protection against dangerous movements................................................. 15
2.13.4
Notes on particular risks ............................................................................. 16
3
Technical data ......................................................................................................... 19
3.1
Chuck data .............................................................................................................. 19
3.2
Clamping force-RPM diagrams............................................................................... 20
3.3
Calculations for clamping force and speed ............................................................ 23
3.3.1
Calculation of the required clamping force in case of a given rpm............ 23
3.3.2
Calculation example: Required initial clamping force Fsp0 for a given rpm n
..................................................................................................................... 26
3.3.3
Calculation of the permissible rpm nzul in case of a given initial clamping
force Fsp0.................................................................................................... 27
3.4
Grades of Accuracy................................................................................................. 28
3.5
Permissible imbalance............................................................................................ 28

Table of Contents
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4
Torques per screw ................................................................................................... 29
5
Assembly................................................................................................................. 30
5.1
Installing and connecting ....................................................................................... 30
5.2
Connection thread draw tube ................................................................................ 31
5.3
Checking the chuck mount ..................................................................................... 32
5.4
Assembly................................................................................................................. 32
5.4.1
Chuck assembly (with cylindrical recess).................................................... 33
5.4.2
Assembly preparation for chuck with reduction or extension flange........ 35
6
Function .................................................................................................................. 36
6.1
Function and handling............................................................................................ 36
6.2
Base jaw position.................................................................................................... 37
6.3
Replacement or renewal of jaws............................................................................ 38
6.4
Functional testing ................................................................................................... 39
7
Maintenance ........................................................................................................... 40
7.1
Lubrication.............................................................................................................. 40
7.2
Technical condition ................................................................................................ 41
7.3
Maintenance intervals............................................................................................ 42
7.4
Disassembling and assembling the chuck .............................................................. 42
8
Spare parts.............................................................................................................. 47
9
Drawing................................................................................................................... 49
10
Declaration of Incorporation ................................................................................... 52
11
Appendix on Declaration of Incorporation, as per 2006/42/EC, Annex II, No. 1 B ..... 53

General
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5
General
About this manual
This manual contains important information for a safe and
appropriate use of the product.
This manual is an integral part of the product and must be kept
accessible for the personnel at all times.
Before starting work, the personnel must have read and
understood this operating manual. Prerequisite for safe working is
the observance of all safety instructions in this manual.
Illustrations in this manual are provided for basic understanding
and may differ from the actual product design.
In addition to these instructions, the documents listed under
(1.1.2, Page 6) are applicable.
Presentation of Warning Labels
To make risks clear, the following signal words and symbols are
used for safety notes.
DANGER
Danger for persons!
Non-observance will inevitably cause irreversible injury or death.
WARNING
Dangers for persons!
Non-observance can lead to irreversible injury and even death.
CAUTION
Dangers for persons!
Non-observance can cause minor injuries.
CAUTION
Material damage!
Information about avoiding material damage.
1
1.1
1.1.1

General
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Applicable documents
• General terms of business*
• Catalog data sheet of the purchased product *
• Calculation of the jaw centrifugal forces, "Technology" chapter
in the lathe chuck catalog *
The documents marked with an asterisk (*) can be downloaded on
our homepage schunk.com
Sizes
This operating manual applies to the following sizes:
• ROTA THW3 200-52
• ROTA THW3 225-66
• ROTA THW3 265-81
• ROTA THW3 315-104
• ROTA THW3 400-128
• ROTA THW3 500-165
• ROTA THW3 630-165
Warranty
The warranty period is 24 months after delivery date from factory
or 500 000 cycles*, if it is used as intended, under the following
conditions:
• Observe the applicable documents,
(1.1.2, Page 6)
• Observe the ambient conditions and operating conditions,
(2.6, Page 10)
• Observe the specified maintenance and lubrication intervals,
(7, Page 40)
Parts touching the workpiece and wear parts are not included in
the warranty.
* A cycle consists of a complete clamping process
("Open" and "Close").
1.1.2
1.1.3
1.2

General
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7
Scope of Delivery
1
Power lathe chuck in the version ordered
1
Set of base jaws
3
Mounting screws
1
Jaw change key
1
Eye bolt from size 225
1
Assembly key from size 265
1
Operating manual
1.3

Basic safety notes
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Basic safety notes
Intended use
This product is intended for clamping workpieces on machine tools
and other suitable technical devices.
• The product may only be used within the scope of its technical
data, (3, Page 19).
• The product is intended for industrial and commercial use.
• Appropriate use of the product includes compliance with all
instructions in this manual.
• The maximum RPM of the chuck and the required clamping
force must be determined by the user for the respective
clamping task based on the applicable standards and technical
specifications of the manufacturer.
(See also “Calculations for clamping force and RPM” in the
chapter “Technical data”). (3, Page 19).
Not intended use
A not intended use of the product is for example:
• It is used as a press, a punch, a toolholder, a load-handling
device or as lifting equipment.
• the product is used for unintended machines or workpieces.
• the technical data is exceeded when using the product.
(3, Page 19)
• if workpieces are not clamped properly, paying particular
attention to the clamping forces specified by the manufacturer.
• if it is used in working environments that are not permissible.
• if the product is operated without a protective cover.
2
2.1
2.2

Basic safety notes
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9
Constructional changes
Implementation of structural changes
By conversions, changes, and reworking, e.g. additional threads,
holes, or safety devices can impair the functioning or safety of the
product or damage it.
• Structural changes should only be made with the written
approval of SCHUNK.
Spare parts
Use of unauthorized spare parts
Using unauthorized spare parts can endanger personnel and
damage the product or cause it to malfunction.
• Use only original spare parts or spares authorized by SCHUNK.
Chuck jaws
Requirements of the chuck jaws
Accumulated energy can make the product unsafe and risk the
danger of serious injuries and considerable material damage.
• Only change chuck jaws if no residual energy can be released.
• Do not use welded jaws.
• The chuck jaws should be designed to be as light and as low as
possible. The clamping point must be as close as possible to the
chuck face (clamping points at a greater distance lead to
greater surface pressure in the jaw guidance and can
significantly reduce the clamping force).
• If, for design reasons, the special chuck jaws are heavier than
the top jaws assigned to the lathe chuck, greater centrifugal
forces must be taken into account when defining the required
clamping force and the recommended speed of rotation.
• The maximum recommended speed of rotation may only be
operated in conjunction with maximum actuating force and
only with the lathe chuck in optimum, fully functioning
condition.
2.3
2.4
2.5

Basic safety notes
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• After a collision, the lathe chuck and the chuck jaws must be
subjected to a crack detection test before being used again.
Damaged parts must be replaced with original SCHUNK spare
parts.
• Renew the chuck jaw mounting bolts if there are signs of wear
or damage. Only use bolts with a quality of 12.9.
Environmental and operating conditions
Required ambient conditions and operating conditions
Incorrect ambient and operating conditions can make the product
unsafe, leading to the risk of serious injuries, considerable material
damage and/or a significant reduction to the product's life span.
• Make sure that the product is used only in the context of its
defined application parameters, (3, Page 19).
• Make sure that the product is a sufficient size for the
application.
• Only use high-quality cooling emulsions with anti-corrosive
additives during processing.
Clamping force measurement
Depending on the operating conditions, the function and clamping
force must be checked after a certain period of operation
(7.1, Page 40).
With the smallest possible actuating pressure (hydraulic cylinder),
the base jaws should move evenly. This method only provides a
limited indication and is not a substitute for measuring the
clamping force.
If the clamping force has dropped too much or if the base jaws and
piston no longer move properly, the chuck must be disassembled,
cleaned, and relubricated (7, Page 40).
2.6