KNECHT HV 262 User manual

Status 03.2018 ■Version 1.2 | Translation
Operating Instructions
Universal Belt Grinding Unit
HV 262

3
Universal Belt Grinding Unit HV 262
Manufacturer
KNECHT Maschinenbau GmbH
Witschwender Straße 26
88368 Bergatreute
Germany
Phone [phone]
Fax [phone]
[email protected]
www.knecht.eu
Documents for the machine operator
Operating Instructions
Date of issue of the operating instructions
March 6, 2018
Copyright
The copyright for these operating instructions as well as other documents for the machine operator is held
by KNECHT Maschinenbau GmbH. These documents will be delivered only to our customers and to opera-
tors of our products and are a part of the machine.
These documents may neither be reproduced, nor made accessible to third parties, in particular rival firms.
Operating Instructions

4
1. Important notes 6
1.1 Foreword 6
1.2 Warnings and symbols in the operating instructions 6
1.3 Figure and item numbers in the operating instructions 7
2. Safety 8
2.1 Basic safety instructions 8
2.1.1 Observe notes in the operating instructions 8
2.1.2 Operator's duty 8
2.1.3 Obligations on the part of the personnel 8
2.1.4 Hazards associated with the handling of the Universal Belt Grinding Unit 8
2.1.5 Malfunctions 9
2.2 Proper use 9
2.3 Warranty and liability 9
2.4 Safety regulations 10
2.4.1 Organisational measures 10
2.4.2 Protective devices 10
2.4.3 Informal safety measures 10
2.4.4 Selection and qualifications of the personnel 11
2.4.5 Operation 11
2.4.6 Safety measures in normal operation 11
2.4.7 Particular hazard areas 11
2.4.8 Servicing (maintenance, repair) and fault rectification 11
2.4.9 Structural alterations to the Universal Belt Grinding Unit 12
2.4.10 Cleaning the Universal Belt Grinding Unit 12
2.4.11 Oils and greases 12
2.4.12 Relocation of the Universal Belt Grinding Unit 12
3. Description 13
3.1 Use as intended 13
3.2 Technical specifications 13
3.3 Functional description 14
3.4 Description of the assemblies 15
4. Transport 16
4.1 Transport aids 16
4.2 Transport damage 16
4.3 Transport to another installation site 16
Table of Contents

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5. Installation 17
5.1 Selection of qualified personnel 17
5.2 Installation site 17
5.3 Settings 17
5.4 Initial commissioning of the Universal Belt Grinding Unit 17
6. Commissioning 19
7. Operation 20
7.1 General principles of grinding technology 20
7.2 Grinding linear cutter knives on the wet-grinding belt 21
7.2.1 Inserting the function disk 21
7.2.2 Setting the grinding angle 22
7.2.3 Mounting the grinding plate 22
7.2.4 Clamping the cutter knife 23
7.2.5 Grinding the cutter knife 23
7.3 Grinding sickle-shaped cutter knives on the wet grinding belt 26
7.4 Increasing the grinding radius 27
8. Care and maintenance 28
8.1 Cleaning 28
8.2 Lubrication schedule and lubricant table 28
9. Disassembly and disposal 29
9.1 Disassembly 29
9.2 Disposal 29
10. Service, spare parts and accessories 30
10.1 Postal Address 30
10.2 Service 30
10.3 Spare parts 30
11. Appendix 31
11.1 EC Declaration of Conformity 31
Table of Contents

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1.1 Foreword
This operator's manual is meant to make it easier to get to know the Universal Belt Grinding Unit
and to use it properly for the intended purpose.
The operator's manual contains important instructions on how to operate the Universal Belt
Grinding Unit safely, properly and cost-effectively. Observance of these instructions helps to avoid
dangers, repair costs and downtimes, and increases the reliability and service life of the Universal
Belt Grinding Unit.
The operating instructions must always be accessible at the place of use of the Universal Belt
Grinding Unit.
The operating instructions must be read and used by all persons entrusted with working on the
Universal Belt Grinding Unit, e.g. those entrusted with
• Transport, installation, commissioning
• Operation, including troubleshooting in the process flow, as well as
• Servicing (maintenance, repair).
In addition to the operating instructions and the binding accident prevention regulations applica-
ble in the country and place of use of the machine, the generally acknowledged rules of technol-
ogy with regard to safe and professional work practices are to be observed.
1.2 Warnings and symbols in the operating instructions
Heeding the following safety alert symbols/designations used in the operating instructions is
absolutely necessary:
The hazard triangle with the signal word “CAUTION” is used as a work
safety indication for all work which could result in death or physical injury.
Special care and caution must be taken when carrying out such jobs.
ATTENTION
The signal word “ATTENTION” is used to call attention to hazards which
could result in damage and/or destruction of the grinding machine or its
environment if special attention is not paid while carrying out particular
jobs.
NOTICE The signal word “NOTE” calls attention to tips on use and useful
information.
1. Important notes
CAUTION

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1.3 Figure and item numbers in the operating instructions
If a component of the machine that is shown in a figure is described in the text, it is followed by a
figure or item number in brackets.
Example: (7-2/1) denotes figure number 7-2, item 1.
Place the function disk (7-2/1) on the locating bolt (7-2/2).
This can be done in two different ways:
For linear cutter knives, the rotation of the function disk is
prevented by a contour (7-2/3). The untoothed region is
then facing in the direction of the operator.
Insert the contour (7-2/3) in the groove (7-2/4).
1. Important notes
3
1
2
4
Figure 7-2 Inserting the function disk

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2.1 Basic safety instructions
2.1.1 Observe notes in the operating instructions
The basic prerequisite for the safe handling and uninterrupted operation of this Universal Belt
Grinding Unit is knowledge of the basic safety instructions and regulations.
• These operating instructions contain important notes on how to operate the Universal Belt
Grinding Unit safely.
• All persons carrying out work on the Universal Belt Grinding Unit must follow these operating
instructions, in particular the safety notices.
• In addition, the accident prevention rules and regulations applicable at the place of use of the
machine must also be observed.
2.1.2 Operator's duty
The operator is obliged to allow only those persons to work on the Universal Belt Grinding Unit,
who
• are familiar with the basic occupational safety and accident prevention regulations and have
been trained and instructed in the handling of the Universal Belt Grinding Unit,
• have read the operating instructions, particularly the “Safety” section, and have read and
understood the warning notes. They have given a signed confirmation of this in writing.
It is also checked at regular intervals as to whether the worker is fulfilling his employee obligation
to observe safety at work.
2.1.3 Obligations on the part of the personnel
All the personnel working on the Universal Belt Grinding Unit shall be obliged, before starting
work, to
• observe the basic occupational safety and accident prevention regulations,
• read the operating instructions, particularly the “Safety” chapter, and the warning notes. They
shall give a signed confirmation of this in writing.
2.1.4 Hazards associated with the handling of the Universal Belt Grinding Unit
The Universal Belt Grinding Unit has been built to the latest technological standards and the
acknowledged rules of technical safety. In spite of that, its use presents inherent risks which could
result in bodily harm or even death of the user or third persons, or impairment of the Universal
Belt Grinding Unit or other property.
The Universal Belt Grinding Unit may be used only:
• for the intended purpose, and
2. Safety

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2. Safety
• in faultless condition with regard to safety-relevant aspects.
Faults that could impair safety must be eliminated immediately.
2.1.5 Malfunctions
If safety-relevant malfunctions occur in the Universal Belt Grinding Unit, or if the processing be-
haviour indicates that such malfunctions may have occurred, the Universal Belt Grinding Unit must
be stopped immediately and until such time as the malfunction has been found and eliminated.
Allow only authorised technical staff to eliminate the malfunctions.
2.2 Proper use
The Universal Belt Grinding Unit is meant for grinding linear and sickle-shaped flat knives only. It is
suitable for attachment to KNECHT grinding machines from the S 200 series and to USK 230. All
the knives must be clamped onto matching grinding plates.
Before starting work on a flat knife, it must be checked whether the knife fits on the grinding
plate. Only then may the knife be clamped onto the grinding plate to prevent damage to the
knife.
Any other use is considered improper use. KNECHT Maschinenbau GmbH does not assume any
liability for damages resulting from improper use. The user alone bears the risk in such cases.
Use as intended includes the observance of all the instructions in the operating instructions.
The Universal Belt Grinding Unit is being used improperly, if, e.g.,
• it is attached to grinding machines other than KNECHT S 200 and USK 230,
• the knife was clamped incorrectly onto the grinding plate,
• attachments are not fastened properly.
• knives are ground in opposite direction of the cutting edge on the wet-grinding belt.
2.3 Warranty and liability
Warranty and liability claims in case of personal injuries or property damage are excluded if such
damage is attributable to one or more of the following causes:
• improper use of the Universal Belt Grinding Unit,
• improper transportation, commissioning, operation and maintenance of the Universal Belt
Grinding Unit and its attachments,

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• operating the Universal Belt Grinding Unit with defective safety devices, or improperly attached
or malfunctioning safety and protective equipment,
• ignoring the operating instructions with regard to transportation, commissioning, operation,
maintenance and repair of the Universal Belt Grinding Unit.
• unauthorised structural alterations to the Universal Belt Grinding Unit,
• insufficient monitoring of machine parts that are exposed to wear.
• use of unapproved replacement and wear parts
Use only original replacement and wear parts. If parts are purchased from external suppliers, it
cannot be guaranteed that they will be constructed and manufactured to withstand the stresses
and provide the required level of safety.
2.4 Safety regulations
2.4.1 Organisational measures
All the existent safety devices must be checked regularly.
Observe prescribed intervals for recurring maintenance work or as specified in the operating
instructions.
2.4.2 Protective devices
Before commissioning the Universal Belt Grinding Unit, it must be ensured that all protective
equipment is properly mounted and in functional condition.
Protective equipment may be removed only after the machine has stopped and has been secured
against accidental restarting of the Universal Belt Grinding Unit.
If sub-components are supplied, the protective equipment must be correctly attached by the
operator according to the instructions.
2.4.3 Informal safety measures
The operating instructions must be permanently available at the place of use of the Universal Belt
Grinding Unit. In addition to the operating instructions, the generally applicable as well as the
locally relevant accident prevention regulations must also be made available and observed.
All the safety alert symbols and danger warnings on the Universal Belt Grinding Unit must be
complete and clearly legible.
2. Safety

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2.4.4 Selection and qualifications of the personnel
Only trained and instructed personnel may work on the Universal Belt Grinding Unit. The mini-
mum legal age for employment must be observed.
The responsibilities of the personnel must be clearly assigned, i.e. commissioning, operation,
maintenance and repair, etc.
Personnel still in the training or instruction phase may only be allowed to work on the Universal
Belt Grinding Unit under the permanent supervision of an experienced person.
2.4.5 Operation
Only adequately instructed and trained personnel are authorised to operate the grinding unit in
connection with the machine.
2.4.6 Safety measures in normal operation
Refrain from any method of working which may pose a risk to safety. Only operate the Universal
Belt Grinding Unit if all the safety devices are installed and fully functional.
Check the Universal Belt Grinding Unit for external signs of damage and correct operation of the
safety devices at least once every shift.
Report any changes (including operating behaviour) immediately to the competent depart-
ment/person. If required, put the grinding machine out of operation immediately and secure
against restarting.
Before using the Universal Belt Grinding Unit, ensure that no one is exposed to any risk from the
start-up of the machine.
Immediately put the Universal Belt Grinding Unit out of operation and secure against restarting in
case of any malfunctions. Have the faults eliminated immediately.
2.4.7 Particular hazard areas
In the area of the grinding wheel, wet-grinding belt and flap brush, there is a hazard of pinching
and being drawn in (e.g. clothing, fingers and hair). Suitable personal protective equipment must
be worn.
2.4.8 Servicing (maintenance, repair) and fault rectification
Maintenance work is to be carried out on schedule by trained personnel. Inform operating
personnel before starting repair work. The responsible supervisor is to be named.
For all service work, the grinding machine is to be disconnected from the power supply and
secured against accidental restarting. Pull out the mains plug. Cordon off the servicing area, as
far as possible.
2. Safety

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After completion of the maintenance work and fault rectification, install all the safety devices and
check whether they are fully functional.
2.4.9 Structural alterations to the Universal Belt Grinding Unit
Modifications, retrofitting or rebuilds of the Universal Belt Grinding Unit are not allowed without
the permission of the manufacturer. This also applies to the installation and adjustment of safety
devices.
No alterations may be carried out without prior written permission from KNECHT Maschinenbau
GmbH.
Immediately replace machine parts which are not in perfect condition.
Use only original replacement and wear parts. If parts are purchased from external suppliers, it
cannot be guaranteed that they will be constructed and manufactured to withstand the stresses
and provide the required level of safety.
2.4.10 Cleaning the Universal Belt Grinding Unit
Cleaning agents and materials used must be handled properly and disposed of in an environmen-
tally friendly way.
Ensure that wear and replacement parts are disposed of in a safe and environmentally friendly
way.
2.4.11 Oils and greases
When handling oils and greases, follow the safety instructions for the product. Observe special
instructions for the foodstuffs sector.
2.4.12 Relocation of the Universal Belt Grinding Unit
Even when moving the grinding machine with the HV 262 Universal Belt Grinding Unit a short
distance from its site, disconnect it from all external power supply sources. Before restarting the
machine, connect it properly to the current supply.
When loading or unloading, only use hoisting and load lifting equipment with sufficient load-
bearing capacity. Appoint a qualified banksman (signaller) for the lifting process.
No persons other than those entrusted with this work may be present in the loading and installa-
tion area.
Only lift the grinding machine correctly with a suspension device in accordance with the operat-
ing instructions (attachment points for load suspension devices, etc.). Only use suitable transport
vehicles with sufficient load-bearing capacity. Attach the load securely. Use suitable attachment
points. When putting in operation again, proceed only as instructed in the operating instructions.
2. Safety

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3. Description
3.1 Use as intended
The HV 262 Universal Belt Grinding Unit is used to grind sickle-shaped and linear cutter knives.
The unit is attached to KNECHT grinding machines from the S 200 series and to USK 230.
3.2 Technical specifications
Height �������������������������������������������������������������� approx. 650 mm
Width ��������������������������������������������������������������� approx. 550 mm
Depth ��������������������������������������������������������������� approx. 760 mm
Weight ����������������������������������������������������������������������� 18 kg
Maximum grinding radius ����������������������������������������������������� 380 mm
Minimum grinding radius ������������������������������������������������������ 55 mm
Possible knife sizes* ������������������������������������������������������� 45-750 ltr.
*) The grinding radius must lie within the specified range.
Figure 3-1 Dimensions in mm
approx. 760 mm
approx. 650 mm
approx. 550 mm
approx. 760 mm
approx. 650 mm
approx. 550 mm

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3. Description
3.3 Functional description
The HV 262 Universal Belt Grinding Unit is used to grind sickle-shaped and linear cutter knives.
The unit is attached to KNECHT grinding machines from the S 200 series and to USK 230.
For grinding of linear knives, the carriage is moved to and fro over a shaft. The movement is
limited by an end stop. For grinding of sickle-shaped knives, the carriage is fixed by locking it in
position with a fork.
The admission shaft is locked or made rotatable by changing the position of the function disk.
This is required for grinding knives with linear and sickle-shaped blades.

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3. Description
3.4 Description of the assemblies
1 Grinding lever
2 Function disk
3 Spacer disks for grinding angle adjustment
4 Base plate
5 Locking lever
6 Locking disk
7 Hand wheel
8 Star knob of the locking disk
9 Grinding plate
10 Knife
5
1
3
4
10
9
7
6
8
2
Figure 3-2 General view of the Universal Belt Grinding Unit

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For transporting the machine, the locally applicable safety and accident
prevention regulations must be observed.
CAUTION
4.1 Transport aids
Only use adequately dimensioned transport aids for transporting and setting up the Universal Belt
Grinding Unit.
4.2 Transport damage
If damage is detected following unloading after acceptance of the delivery, inform KNECHT
Maschinenbau GmbH and the freight forwarder about it immediately. If required, consult an
independent expert immediately.
Remove the packaging and shipping straps. Remove the shipping straps on the Universal Belt
Grinding Unit. Dispose of the packaging in an environmentally friendly way.
4.3 Transport to another installation site
For transportation to another installation site, ensure that the space requirements are fulfilled
(see Chapter 3.2).
The Universal Belt Grinding Unit must be adequately secured against toppling during
transportation.
4. Transport

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5. Installation
5.1 Selection of qualified personnel
It is advisable to have trained KNECHT personnel perform the installation
work on the Universal Belt Grinding Unit.
We assume no liability for damage caused by improper installation.
CAUTION
5.2 Installation site
When determining the installation site, bear in mind the space requirement for installation,
maintenance and repair work on the Universal Belt Grinding Unit (see Chapter 3.2).
5.3 Settings
The various components are adjusted by KNECHT Maschinenbau GmbH before delivery.
ATTENTION Unauthorised changes to set values are not
permitted and may damage the Universal
Belt Grinding Unit
5.4 Initial commissioning of the Universal Belt Grinding Unit
Completely install and check the safety devices before commissioning
The Universal Belt Grinding Unit is only suitable for attachment to KNECHT grinding machines
from the S 200 series and to USK 230
Have all the protective devices checked for proper functioning by
authorised specialists before initial operation of the machine.
CAUTION

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5. Installation
The mounting plate (5-1/1) of the Universal Belt
Grinding Unit is fastened onto the side wall of the
grinding machine with two M10 screws.
The tapped boreholes are provided in the S 200
series and in USK 230 in versions made from 1991
onwards.
If the machine was constructed before 1991, drill-
ing templates must be requested from KNECHT
Maschinenbau GmbH.
Boreholes can be drilled in the right side wall with
the help of these templates.
ATTENTION Before drilling, the contact disk on the grind-
ing machine must be removed.
Figure 5-1 Mounting the Universal Belt Grind-
ing Unit
1

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All work on the machine may only be performed by trained personnel.
The locally applicable safety and accident prevention regulations must be
observed.
There is a risk of hands, hair and clothes getting caught in the grinding
machine while the machine is on.
This can result in serious injuries. Personal protective equipment must be
worn.
CAUTION
To save space, it is possible to swivel the HV 262
Universal Belt Grinding Unit (6-1/3) to the side.
To bring it to working position, push it onto the
pins (6-1/1) and clamp it tight with the clamping
lever (6-1/2).
The clamping lever (6-1/2) and the pins (6-1/1) can
be requested from KNECHT Maschinenbau GmbH.
Turn the “Units ON / OFF” switch on the grinding
machine to “ON” position. Wet-grinding belt, flap
brush and grinding disk start rotating.
6. Commissioning
Figure 6-2 “Units ON/OFF”
Figure 6-1 Swivelling the Universal Belt Grind-
ing Unit to working position
1
2
3

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7.1 General principles of grinding technology
If a blade has become blunt, material must be removed from its surface to restore it to its original
sharpness.
For that, the knife in question is ground to produce its cutting edge. If, in the process, a burr
appears on the blade, then the grinding process was successful and can be concluded. Now,
before the final sharpness is achieved, the burr must be removed in a further step. This is done
with a flap brush.
As it is not only the sharp cutting edges but also the long service lives that define a blade, the
cutting angle is another important indicator of a blade's performance. The smaller the cutting
edge angle, the higher the theoretical service life. In practice, however, the cutting edge breaks
off and is therefore no longer sharp when the cutting edge angle is too small.
The cutting edge angles must therefore lie between 15° and 35°. If the cutting edge angles
are less than 15°, the blade becomes so unstable that it breaks at the slightest resistance. If the
cutting edge angle is greater than 35°, the blade is extremely stable, but service life will not be as
long.
One more criterion for judging the properties of a cutting edge is the cutting edge profile.
There are three different ground profiles:
Tapered grinding Convex grinding Concave grinding
Convex ground profiles can mostly be found on cutter blades and hand knives. Tapered and
concave ground profiles are predominantly found on circular knives and blades.
In general: Adhering to the profiles and the cutting edge angles specified by the manufacturer is
required
7. Operation

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Figure 7-2 Inserting the function disk
3
1
2
4
There is a risk of hands, hair and clothes getting caught in the grinding
machine while the machine is on.
This can result in serious injuries.
CAUTION
7.2 Grinding linear cutter knives on the wet-grinding belt
Swivel the Universal Belt Grinding Unit (7-1/3) to
working position by pushing it onto the pins (7-
1/1) and clamping it tight with the clamping lever
(7-1/2).
7.2.1 Inserting the function disk
Place the function disk (7-2/1) on the locating bolt
(7-2/2).
This can be done in two different ways:
For linear cutter knives, the rotation of the func-
tion disk is prevented by a contour (7-2/3). The
untoothed region is then facing in the direction of
the operator.
Insert the contour (7-2/3) in the groove (7-2/4).
7. Operation
Figure 7-1 Swivelling the Universal Belt Grind-
ing Unit to working position
1
1
2
3