KNECHT HV 207 User manual

Status 03.2022 Version 1.0 | Translation
Operating Instructions
Swivel Arm | Belt-Grinding Unit
HV 207 | HV 261

3
Swivel Arm HV 207
Belt-Grinding Unit HV 261
Manufacturer
KNECHT Maschinenbau GmbH
Witschwender Straße 26
88368 Bergatreute
Germany
Phone [phone]
Fax [phone]
[email protected]
www.knecht.eu
Documents for machine operator
Operating Instructions
Date of issue of the operating instructions
March 11, 2022
Copyright
These operating instructions as well as the operating documents remain the copyright property of KNECHT
Maschinenbau GmbH. They are supplied only to customers and operators of our products
and belong to the machine.
Without our express permission, these documents may neither be duplicated nor made accessible to third
parties, in particular competitor companies.
Operating Instructions

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1. Important notes 7
1.1 Preface to the operating instructions 7
1.2 Warnings and symbols in the operating instructions 7
1.3 Figure and position numbers in the operating instructions 8
2. Safety 9
2.1 Basic safety instructions 9
2.1.1 Observe notes in the operating instructions 9
2.1.2 Obligation on the part of the operator 9
2.1.3 Obligation on the part of the personnel 9
2.1.4 Hazards involved in handling the grinding units 9
2.1.5 Malfunctions 10
2.2 Intended use 10
2.3 Warranty and liability 11
2.4 Safety regulations 11
2.4.1 Organizational measures 11
2.4.2 Protective equipment 11
2.4.3 Informal safety measures 12
2.4.4 Selection and qualification of personnel 12
2.4.5 Machine control system 12
2.4.6 Safety measures in normal operation 12
2.4.7 Hazards due to electrical power sources 12
2.4.8 Particular hazard areas 13
2.4.9 Servicing (maintenance, repair) and fault rectification 13
2.4.10 Structural modifications to the grinding units 13
2.4.11 Cleaning the grinding units 13
2.4.12 Lubricants/ oils and greases 13
2.4.13 Relocation of the grinding machine with grinding units 13
3. Description 15
3.1 Intended use of the HV 207 Swivel Arm 15
3.2 HV 207 Technical specifications 15
3.3 HV 207 Functional description 16
3.4 HV 207 Description of the assemblies 17
3.4.1 Mounting head for sickle-shaped knives 17
3.4.2 Spacer disc 18
3.5 Intended use of the HV 261 Belt-Grinding Unit 19
3.6 HV 261 Technical specifications 19
3.7 HV 261 Functional description 20
3.8 HV 261 Description of the assemblies 21
Table of Contents

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4. Transport 22
4.1 Transport aids 22
4.2 Transport damage 22
4.3 Transport to another installation site 22
5. Installation 23
5.1 Selection of qualified personnel 23
5.2 Installation site 23
5.3 Settings 23
5.4 Initial start-up of the grinding units 23
6. Commissioning HV 207 24
6.1 Mounting the HV 207 Swivel Arm 24
7. Operating the HV 207 25
7.1 Grinding sickle-shaped knives on the grinding wheel 25
7.1.1 Attaching the SP 107 grinding plate 25
7.1.2 Clamping the knife 29
7.1.3 Positioning the knife on the grinding wheel 30
7.1.4 Setting the grinding angle 31
7.1.5 Grinding sickle-shaped cutter knives (convex cutting edge) 32
8. Commissioning HV 261 34
8.1 Swiveling the HV 261 Belt-Grinding Unit into working position 34
9. Operating the HV 261 36
9.1 Grinding sickle-shaped cutter knives on the wet-grinding belt
(convex cutting edge) 36
9.1.1 Setting the grinding angle 36
9.1.2 Mounting the grinding plate 36
9.1.3 Adjusting the swivel range of the grinding plate 37
9.1.4 Clamping cutter knives 38
9.1.5 Basic function of the HV 261 locking mechanism 39
9.1.6 Bringing the HV 261 Belt-Grinding Unit into adjustment position 40
9.1.7 Grinding cutter knives 42
9.1.8 Deburring and polishing cutter knives 44
Table of Contents

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10. Care and maintenance 45
10.1 Cleaning 45
10.1.1 Lubricant table 45
10.2 Maintenance plan (one-shift operation) 45
11. Disassembly and disposal 46
11.1 Disassembly 46
11.2 Disposal 46
12. Service, spare parts and accessories 47
12.1 Postal address 47
12.2 Service 47
12.3 Spare parts 47
13. Appendix 48
13.1 EU Declaration of Conformity 48
Table of Contents

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1.1 Preface to the operating instructions
These operating instructions are intended to make it easy to learn how to use the grinding units
and to properly utilize their features.
These operating instructions contain important notes on how to operate the grinding units safely,
properly, and efficiently. Your attention helps to avoid hazards, reduce repair costs and down-
times, and to increase the reliability and service life of the grinding units.
The operating instructions must always be stored in the location that the grinding units are used.
The operating instructions must be read and applied by every person who is assigned to work on
the grinding units, e. g.:
• transport, installation, commissioning
• operation, including troubleshooting in the work sequence, as well as
• maintenance (servicing, repair).
Recognized technical standards for safe and professional work must be observed in addition to
these operating instructions and the binding accident prevention regulations applicable in the
country of use and at the place of use.
1.2 Warnings and symbols in the operating instructions
The operating instructions use the following symbols/designations that must be followed:
The hazard triangle with the signal word “CAUTION” serves as a work
safety notice for all work for which there is a risk of personal injury or
death.
In these cases, work should be done with special attention and care.
ATTENTION
“ATTENTION” is located in areas that require special care to prevent
damage to and/or destruction of the grinding units or their surroundings.
NOTE ”NOTICE” refers to user tips and especially useful information.
1. Important notes
CAUTION

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1.3 Figure and position numbers in the operating instructions
If the text makes a reference to a machine component illustrated in a picture, the figure and
position number will be given in brackets.
Example: (7-11/1) means Figure number 7-11, position 1.
Clamp the knife (7-11/1) onto the grinding plate
(7-11/2).
1. Important notes
Figure 7-11 Clamping the knife onto the
grinding plate
2
1

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2.1 Basic safety instructions
2.1.1 Observe notes in the operating instructions
The basic prerequisite for safe use and trouble-free operation of these grinding units is knowledge
of the basic safety instructions and safety regulations.
• These operating instructions contain important notes on how to operate the grinding units
safely.
• All persons carrying out work on the grinding units must follow these operating instructions,
in particular the safety notices.
• In addition, the rules and regulations regarding accident prevention at the place of use are to
be observed.
2.1.2 Obligation on the part of the operator
The operator is obliged to allow only those persons to work on the grinding units, who
• are familiar with the basic regulations on work safety and accident prevention and have been
trained and instructed in the handling of the grinding units,
• have read and understood the operating instructions, in particular the section entitled “Safety”
and the warning notes and have provided signed confirmation of this.
The safety-awareness of the personnel at work will be monitored at regular intervals.
2.1.3 Obligation on the part of the personnel
All personnel working on the grinding units shall be obliged, before starting work, to
• observe basic work safety and accident prevention regulations,
• read the operating instructions, particularly the section entitled “Safety” and the warning notes,
and provide signed confirmation that they have understood them.
2.1.4 Hazards involved in handling the grinding units
The grinding units have 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 grinding units or other
property.
The grinding units are only to be used
• for its intended purpose
• in faultless condition with regard to safety-related aspects.
2. Safety

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Malfunctions that may impair safety are to be eliminated immediately.
2.1.5 Malfunctions
If safety-relevant malfunctions occur with the grinding units, or if the operating behavior indicates
that such malfunctions may have occurred, the grinding units must be stopped immediately until
the malfunction has been found and eliminated.
Malfunctions may only be eliminated by authorized qualified personnel.
2.2 Intended use
The HV 207 and HV 261 grinding units are exclusively intended for grinding sickle-shaped flat
machine knives (e.g. cutter knives). They are suitable for mounting on the KNECHT grinding
machines of the S 200 model series.
All knives must be clamped onto the corresponding holding fixtures for grinding. First, check
whether the holding fixture matches the knife to be ground. The knife can only be ground if this
is the case.
Any other use is considered as not intended. KNECHT Maschinenbau GmbH is not liable for any
damage resulting from this. The user alone bears this risk.
Intended use also includes observing all instructions in the operating manual.
ATTENTION The grinding unit is being used improperly,
if, e.g.
• it is installed onto grinding machines other
than the KNECHT S 200 series,
• the knife has been clamped incorrectly,
• the knife is ground without being clamped,
• protective equipment is not properly
attached.
2. Safety

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2.3 Warranty and liability
Warranty and liability claims in case of personal injury or property damage are excluded if such
damage is attributable to one or more of the following causes:
• improper use of the grinding units,
• improper transport, commissioning, operation, and maintenance of the grinding units,
• operating the grinding units with defective safety devices, or improperly installed safety and
protective devices,
• ignoring the operating instructions with regard to transportation, commissioning, operation,
maintenance and repair of the grinding units,
• unauthorized structural modifications to the grinding units,
• inadequate monitoring of parts subject to wear and tear as well as
• use of non-approved spare and wear parts.
Only use original spare and wear parts. In the case of parts purchased from other manufacturers,
it cannot be guaranteed that they have been designed and manufactured in accordance with the
stress and safety requirements.
2.4 Safety regulations
2.4.1 Organizational measures
All existing safety devices must be checked regularly.
The intervals for recurring maintenance work prescribed or specified in the operating instructions
must be observed!
2.4.2 Protective equipment
Before commissioning the grinding units, ensure that all protective devices are properly mounted
and in functional condition.
Protective devices may be removed only after the grinding units have been stopped and secured
against accidental restart.
When delivering spare parts, the protective devices must be attached by the operator as stipulated.
2. Safety

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2.4.3 Informal safety measures
The operating instructions must be permanently available in the place that the grinding units are
used. In addition to the operating instructions, the generally applicable as well as locally relevant
accident prevention regulations must also be made available and observed.
All safety alert symbols and danger warnings on the grinding units must be complete and clearly
legible.
2.4.4 Selection and qualification of personnel
Only trained and instructed personnel may work on the grinding units. Observe the legally
permitted minimum age!
The responsibilities of personnel with respect to commissioning, operation, maintenance, and
repair must be clearly specified.
Personnel still in the training or instruction phase are only permitted to work on the grinding
units under the constant supervision of an experienced person!
2.4.5 Machine control system
Only trained and instructed personnel are permitted to switch on the machine.
2.4.6 Safety measures in normal operation
Do not operate the machine in any unsafe manner. Only operate the grinding units if all safety
devices are installed and fully functional.
At least once per shift (or per day), check the grinding units for externally visible damage and
proper functioning of the safety devices.
Immediately report any changes present (including those of the operating behavior) to the
responsible office or person. If necessary, immediately shut down the grinding units and secure
them against restart.
Before you switch on the grinding machine, ensure that no one can be injured by the start-up of
the machine.
In the event of a malfunction, immediately stop the grinding machine and secure it against
restart. Rectify malfunctions immediately.
2.4.7 Hazards due to electrical power sources
Work on electrical systems or operating materials may only be performed by a qualified electrician,
in accordance with electrical regulations.
Defects, such as damaged cables, cable connections, etc. must be immediately rectified by an
authorized specialist.
2. Safety

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2.4.8 Particular hazard areas
In the area of the grinding wheel, wet-grinding belt and finned brush, there is a hazard of pinching
and being drawn in, e.g. clothing, fingers and hair. Wear suitable personal protective equipment.
2.4.9 Servicing (maintenance, repair) and fault rectification
Maintenance work is to be carried out on schedule by trained personnel. Inform operating per-
sonnel before beginning repair work. Designate a supervisor responsible for this.
For all service work, the grinding machine is to be disconnected from the current supply and
secured against accidental restart.
Remove power plug. Cordon off the repair area as far as it is required.
After completing maintenance work and rectifying any faults, install all safety devices and verify
that they are fully functional.
2.4.10 Structural modifications to the grinding units
Modifications, retrofits or rebuilds of the grinding units are not allowed without the permission of
the manufacturer. This also applies for installation and configuration of the safety devices.
Any conversion work requires the written permission from KNECHT Maschinenbau GmbH.
Immediately replace any machine parts that are not in a serviceable state.
Use only original replacement and wear parts. When using external parts, it cannot be guaranteed
that they are constructed and manufactured to be suitable and safe.
2.4.11 Cleaning the grinding units
Properly handle any cleaning agents and materials used and dispose of them in an environ-
mentally-friendly manner.
Dispose of the wear parts and replacement parts in a safe and environmentally-friendly manner.
2.4.12 Lubricants/oils and greases
When using oils and greases, follow the safety regulations applicable to the product. Comply with
the special regulations for the foodstuffs sector.
2.4.13 Relocation of the grinding machine with grinding units
Disconnect the grinding machine from any external current supply, even if adjusting its position
slightly. Before restarting the grinding machine, properly connect it to the power supply.
2. Safety

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When loading or unloading, only use suspension devices and load suspension devices with
sufficient load-bearing capacity. Designate a qualified instructor for the lifting operation.
Ensure that only persons authorized to carry out this work are located where the machine is
unloaded and installed.
Use only a suitable transport vehicle with sufficient carrying capacity. Secure loads safely. See
also the operating instructions for the S 200 universal wet-sharpening machine (chapter 4,
“Transport”). When recommissioning, do so only in accordance with the operating instructions.
2. Safety

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3. Description
3.1 Intended use of the HV 207 Swivel Arm
The HV 207 Swivel Arm is used to grind sickle-shaped cutter knives as well as cutting tools with
sickle-shaped cutting edges on the cup grinding wheel.
It can be used to grind precise angles with simple operation and minimal effort.
The device is used on the KNECHT grinding machines of the S 200 model series.
3.2 HV 207 Technical specifications
Height �������������������������������������������������������������� approx. 110 mm
Width ��������������������������������������������������������������� approx. 430 mm
Depth ���������������������������������������������������������������� approx. 70 mm
Weight ��������������������������������������������������������������� approx. 1,7 kg
Maximum grinding radius ����������������������������������������������������� 435 mm
Minimum grinding radius ������������������������������������������������������ 80 mm
Poss. Cutter knife sizes* ����������������������������������������������������� 45–500 l
*) The grinding radius must be within the specified range.
ATTENTION The grinding radius is not the blade radius.
The grinding radius of a knife can be found
on the grinding plate suitable for this knife,
e.g. SR 300.
Figure 3-1 HV 207 top view, (dimensions in mm)
70 mm
430 mm

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3. Description
ATTENTION The grinding plate with corresponding
knife must be mounted in the correct position
on the swivel arm. SR 80–365 front and
SR 130–435 rear.
The swivel arm is labeled accordingly.
3.3 HV 207 Functional description
The HV 207 Swivel Arm can be used to grind sickle-shaped knives up to a grinding radius of
435 mm. To grind, the cutting tool is moved concentrically over the cup grinding wheel. Cutter
knives are pre-sharpened on the cup grinding wheel and, if necessary, receive a repair grinding.
Cutting tools with tapered cutting edges are finished ground here.

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3. Description
3.4 HV 207 Description of the assemblies
1 Hand wheel to set grinding angle
2 Angle scale
3 Rotatable mounting head (for sickle-shaped knives)
4 Cup grinding wheel with guard
3.4.1 Mounting head for sickle-shaped knives
The rotatable mounting head (3-3/1) is used to
grind sickle-shaped knives on the cup grinding
wheel.
Figure 3-2 HV 207 Swivel Arm, general view
4
3
1
2
Figure 3-3 Rotatable mounting head
1

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3.4.2 Spacer disc
The spacer disc (3-4/1) is used when grinding
sickle-shaped knives with a grinding radius bigger
than SR 200 mm on the HV 207.
The spacer disc is placed on the locating bolt (see
chapter 7.1.1, Figure 7-3). Then the grinding plate
is mounted.
Figure 3-4 Spacer disc
1
3. Description

770 mm
320 mm
240 mm
770 mm 770 mm
320 mm
240 mm
770 mm
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3. Description
3.5 Intended use of the HV 261 Belt-Grinding Unit
The HV 261 Belt-Grinding Unit is used to grind sickle-shaped cutter knives as well as cutting tools
with sickle-shaped cutting edges on the wet-grinding belt.
It can be used to grind precise angles with simple operation and minimal effort.
The device is used on the KNECHT grinding machines of the S 200 model series.
3.6 HV 261 Technical specifications
Height �������������������������������������������������������������� approx. 320 mm
Width ��������������������������������������������������������������� approx. 240 mm
Depth ��������������������������������������������������������������� approx. 770 mm
Weight ����������������������������������������������������������������� approx. 7 kg
Maximum grinding radius ����������������������������������������������������� 400 mm
Minimum grinding radius ������������������������������������������������������ 80 mm
Poss. Cutter knife sizes* ����������������������������������������������������� 45–500 l
*) The grinding radius must be within the specified range.
Figure 3-5 HV 261 side and top view, (dimensions in mm)

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3.7 HV 261 Functional description
The HV 261 Belt-Grinding Unit can be used to grind knives with sickle-shaped cutting edges
up to a grinding radius of 400 mm. To grind, the cutting tool is moved concentrically over the
wet-grinding belt.
The HV 261 grinds cutter knives with normal wear.
3. Description

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3.8 HV 261 Description of the assemblies
1 Grinding lever
2 Locking lever
3 Locking disc
4 Hand wheel
5 Locking disc star handle
6 Cutter knife
7 Grinding plate
Figure 3-6 HV 261 Belt-Grinding Unit, general view
6
7
5
1
2
4
3
3. Description