KNECHT HV 161 User manual

Status 05.2018 ■Version 1.0 | Translation
Operating Instructions
Belt Grinding Attachment
HV 161

Operating Instructions
3
Belt Grinding Attachment HV 161
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
May 28, 2018
Copyright
The copyright for these operating instructions and documents is held by KNECHT Maschinenbau GmbH.
These documents will be delivered only to our customers and to operators of our products and are a part of
the machine.
These documents may neither be reproduced, nor made accessible to third parties, including rival firms,
without our express permission.

4
1. Important notes 6
1.1 Preface to the operating instructions 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 Obligation on the part of the operator 8
2.1.3 Obligation on the part of the personnel 8
2.1.4 Hazards involved in handling the belt grinding attachment 8
2.1.5 Malfunction 9
2.2 Intended use 9
2.3 Warranty and liability 9
2.4 Safety regulations 10
2.4.1 Organizational measures 10
2.4.2 Protective equipment 10
2.4.3 Informal safety measures 10
2.4.4 Selection and qualification of personnel 11
2.4.5 Operation 11
2.4.6 Safety measures in normal operation 11
2.4.7 Particular hazard zones 11
2.4.8 Servicing (maintenance, repair) and fault elimination 11
2.4.9 Structural modifications to the belt grinding attachment 12
2.4.10 Cleaning the belt grinding attachment 12
2.4.11 Oils and greases 12
2.4.12 Relocating the belt grinding attachment 12
3. Description 13
3.1 Intended use 13
3.2 Technical specifications 13
3.3 Functional description 14
3.4 Description of modules 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

5
5. Installation 17
5.1 Selection of qualified personnel 17
5.2 Installation site 17
5.3 Settings 17
5.4 Initial start-up of the belt grinding attachment 17
6. Commissioning 18
7. Operation 19
7.1 General principles of grinding technology 19
7.2 Grinding sickle-shaped cutter knives on the wet-grinding belt 20
7.2.1 Adjusting the grinding angle 20
7.2.2 Mounting the grinding plate 21
7.2.3 Clamping on the cutter knife 21
7.2.4 Grinding the cutter knife 22
8. Care and maintenance 25
8.1 Cleaning 25
8.2 Lubrication schedule and lubricant table 25
9. Disassembly and disposal 26
9.1 Disassembly 26
9.2 Disposal 26
10. Service, spare parts and accessories 27
10.1 Postal address 27
10.2 Service 27
10.3 Spare parts 27
11. Appendix 28
11.1 EC Declaration of Conformity 28
Table of contents

6
1.1 Preface to the operating instructions
These operating instructions are meant to make it easier to get to know the belt grinding attach-
ment and to use it properly for its intended purpose.
The operating instructions contain important information on how to operate the belt grinding
attachment safely, properly and cost-effectively. Observance of these instructions helps avoid
hazards, reduce repair costs and downtimes, and increase the reliability and service life of the belt
grinding attachment.
The operating instructions must always be accessible at the place of use of the belt grinding
attachment.
The operating instructions must be read and used by all persons entrusted with working on the
belt grinding attachment, e.g. those entrusted with:
• Transport, installation, commissioning
• Operation, including troubleshooting in the process flow, as well as
• Upkeep (maintenance, repair).
In addition to the operating instructions and the binding accident prevention regulations applica-
ble in the country and place in which the machine is used, generally acknowledged technological
rules with regard to safe and professional work practices are to be observed.
1.2 Warnings and symbols in the operating instructions
It is essential to observe the following symbols/designations used in the operating instructions.
The hazard triangle with the signal word “CAUTION” is used as a work
safety indication for all work which might result in death or physical injury.
Special care and caution must be taken when carrying out such work.
ATTENTION
”ATTENTION” is used to draw attention to particular points in order to
avoid damage and/or destruction of the belt grinding attachment and its
environment.
NOTICE ”NOTE” refers to user tips and especially useful information.
1. Important notes
CAUTION

1
7
1.3 Figure and item numbers in the operating instructions
If the text refers to an attachment component shown in a figure, a figure or item number is add-
ed in brackets after the machine component.
Example: (7-11/1) denotes figure number 7-11, item 1.
The quantity of coolant is regulated by the water nozzle
(7-11/1).
Turning clockwise = more water
Turning counterclockwise = less water
1. Important notes
Figure 7-11 Water regulation on the
wet-grinding belt

8
2.1 Basic safety instructions
2.1.1 Observe notes in the operating instructions
The basic prerequisite for safe handling and trouble-free operation of this belt grinding attach-
ment is familiarity with the basic safety instructions and regulations.
• These operating instructions contain important notes on how to operate the belt grinding at-
tachment safely.
• These operating instructions, in particular the safety notes, must be read by all those who work
at the belt grinding attachment.
• 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 belt grinding attachment, who
• are familiar with the occupational safety and accident prevention regulations and have been
received instruction in handling the belt grinding attachment
• have read and understood the operating instructions, in particular the section entitled "Safety"
and the warning notes, and have provided signed confirmation of this.
Checks are also carried out at regular intervals to ensure that the personnel are fulfilling their
obligation to observe safety at work.
2.1.3 Obligation on the part of the personnel
All personnel working on the belt grinding attachment undertake to
• observe basic occupational safety and accident prevention regulations,
• read the operating instructions, particularly the section entitled “Safety” and the warning notes,
and provide signed confirmation of this
2.1.4 Hazards involved in handling the belt grinding attachment
The belt grinding attachment has been built to the latest technological standards and the estab-
lished rules of technical safety. In spite of this, its use poses inherent risks which could result in
bodily harm or even death of the user or third parties, or impairment of the belt grinding attach-
ment or other property.
The belt grinding attachment may only be used:
• for its intended purpose
• in faultless condition with regard to safety-related aspects
2. Safety

9
Faults that might impair safety must be eliminated immediately.
2.1.5 Malfunction
If any safety-relevant malfunction occurs on the belt grinding attachment or if the processing re-
sponse indicates that such malfunction may have occurred, the belt grinding attachment must be
stopped immediately until such time as the malfunction has been detected and eliminated.
Malfunctions may only be eliminated by authorized specialists.
2.2 Intended use
The belt grinding attachment is meant for grinding sickle-shaped flat knives only. It is meant to be
installed onto KNECHT grinding machines of the USK 160 S series only. All knives must be tight-
ened to the respective grinding plates.
Before starting work on a flat knife, a check must first be carried out as to whether the knife fits
onto the grinding plate. The knife can only be tightened to the grinding plate if it fits, because
otherwise the knife may be damaged.
Any other use is considered improper use. KNECHT Maschinenbau GmbH assumes no 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 belt grinding attachment is being used improperly if, for example:
• it is installed onto grinding machines other than the KNECHT USK 160 S series,
• the knife is improperly tightened to the grinding plate,
• attachments are not properly mounted,
• knives are sharpened/polished in the opposite direction of the cutting edge on the wet-grinding
belt or wet-honing wheel/finned brush.
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 belt grinding attachment,
• improper transportation,commissioning, operation and maintenance of the belt grinding attach-
ment,
• operating the belt grinding attachment with defective safety devices, or using improperly at-
tached or malfunctioning safety and protective equipment,
2. Safety

10
• failure to observe the instructions with regard to transportation, commissioning, operation,
maintenance and repair of the belt grinding attachment,
• unauthorized structural alterations to the belt grinding attachment,
• unauthorized modification of such aspects as drive conditions (power and speed) and
• 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, there
is no guarantee that they are designed and manufactured to withstand the required level of stress
and provide the required level of safety.
2.4 Safety regulations
2.4.1 Organizational measures
All available safety devices must be checked regularly.
Observe prescribed intervals for recurring maintenance work or as specified in the operating
instructions.
2.4.2 Protective equipment
Before commissioning the belt grinding attachment, care must be taken to ensure that all protec-
tive equipment is properly mounted and functional.
Protective equipment may be removed only after the machine has stopped and has been secured
against accidental restarting of the belt grinding attachment.
If sub-components are supplied, the protective equipment must be correctly attached by the oper-
ator according to the instructions.
2.4.3 Informal safety measures
The operating instructions must be permanently available at the place of use of the belt grinding
attachment. In addition to the operating instructions, the generally applicable as well as the local-
ly relevant accident prevention regulations must also be made available and observed.
All safety alert symbols and danger warnings on the belt grinding attachment must be complete
and clearly legible.
2. Safety

11
2.4.4 Selection and qualification of personnel
Only trained and instructed personnel may work on the belt grinding attachment. The minimum
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 undergoing training or instruction may only work on the belt grinding attachment
under the permanent supervision of an experienced person!
2.4.5 Operation
Only trained and instructed personnel are permitted to operate the grinding device 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 belt grind-
ing attachment if all the safety devices are installed and fully functional.
Check the belt grinding attachment for external signs of damage and correct operation of the
safety devices at least once every shift.
Report any changes (including operating behavior) immediately to the department/person in
charge. Also immediately deactivate the grinding machine and secure it against restart.
Before switching on the grinding machine, ensure that no one is exposed to any risk from the
start-up of the machine.
Immediately put the belt grinding attachment out of operation and secure against restart in the
event of any malfunctions. Have the faults eliminated immediately.
2.4.7 Particular hazard zones
In the area of the wet-grinding belt, flat wheel, whetstone, finned brush, and wet-honing wheel,
there is a risk that clothing, fingers, and hair, for example, may be pulled in and crushed. Suitable
personal protective equipment must be worn.
2.4.8 Servicing (maintenance, repair) and fault elimination
Maintenance work is to be carried out on schedule by trained personnel. Inform operating per-
sonnel before starting repair work. A responsible supervisor must be appointed.
For all service work, the belt grinding attachment 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

12
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 modifications to the belt grinding attachment
Modifications, retrofitting or rebuilds of the belt grinding attachment 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 the prior written approval of KNECHT Maschinenbau
GmbH.
Immediately replace machine parts which are not in perfect condition.
Only use original replacement and wear parts. If parts are purchased from external suppliers, there
is no guarantee that they are designed and manufactured to withstand the required level of stress
and provide the required level of safety.
2.4.10 Cleaning the belt grinding attachment
Cleaning agents and materials used must be handled properly and disposed of in an environ-
ment-friendly manner.
Ensure that wear and replacement parts are disposed of in a safe and environmentally friendly
way.
2.4.11 Oils and greases
When handling lubricants/oils and greases, follow the safety regulations for the product. Observe
special instructions for the foodstuffs sector.
2.4.12 Relocating the belt grinding attachment
Even when moving the grinding machine with HV 161 belt grinding attachment 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 (signaler) 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 hoisting gear in accordance with the operating
instructions (attachment points for hoisting equipment, 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

13
3. Description
3.1 Intended use
The HV 161 belt grinding attachment is used to grind sickle-shaped cutter knives. This attachment
is meant to be installed onto KNECHT grinding machines of the USK 160 S series.
3.2 Technical specifications
Height �������������������������������������������������������������� approx. 475 mm
Width ��������������������������������������������������������������� approx. 280 mm
Depth ��������������������������������������������������������������� approx. 163 mm
Weight ���������������������������������������������������������������������� 3.5 kg
Maximum grinding radius ����������������������������������������������������� 260 mm
Minimum grinding radius ������������������������������������������������������ 70 mm
Figure 3-1 Dimensions in mm
474,8 mm
163,12 mm
280 mm
474,8 mm
163,12 mm
280 mm

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3.3 Functional description
The HV 161 belt grinding attachment is used to grind sickle-shaped cutter knives. This attachment
is meant to be installed onto KNECHT grinding machines of the USK 160 S series.
To grind, the cutter knife is moved back and forth over a wet-grinding belt.
Spacer discs for 25° and 27° are used to set the desired grinding angle.
3. Description

15
3. Description
3.4 Description of modules
1 Grinding lever
2 Grinding plate
3 Spacer discs for grinding angle adjustment
4 Hand wheel for feeding the belt grinding attachment
5 Spacer disc bracket
Figure 3-2 HV 161 belt grinding attachment
1
2
3
4
5

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4. Transport
For transporting the machine, the locally applicable safety and accident
prevention regulations must be observed.
CAUTION
4.1 Transport aids
Use only transport aids of sufficient size when transporting and setting up the belt grinding
attachment.
4.2 Transport damage
If damage is detected on unloading after acceptance of the delivery, inform KNECHT Maschinen-
bau GmbH and the freight forwarder immediately. If required, consult an independent expert
immediately.
Remove the packaging and shipping straps. Remove the shipping straps on the belt grinding
attachment. Dispose of the packaging in an environment-friendly way.
4.3 Transport to another installation site
For transport to another installation site, ensure that space requirements are fulfilled (see
Chapter 3.2).
The belt grinding attachment must be secured properly during transport.

17
5.1 Selection of qualified personnel
We recommend having the belt grinding attachment installed by trained
KNECHT personnel.
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 required for installation,
maintenance and repair work on the belt grinding attachment (see Chapter 3.2).
5.3 Settings
The various components and the electrical system are adjusted by KNECHT Maschinenbau GmbH
prior to delivery.
ATTENTION Unauthorized changes to set values are not
permitted and may damage the belt grinding
attachment.
5.4 Initial start-up of the belt grinding attachment
Completely install and check the safety devices before commissioning.
The belt grinding attachment is meant to be installed onto KNECHT grinding machines of the
USK 160 S series only.
Be sure to have all the safety devices checked by trained personnel
before commissioning.
CAUTION
5. Installation

18
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 that hands, hair, and clothing may be pulled in while the
grinding machine is switched on.
This can result in serious injury. Personal protective equipment must be
worn.
CAUTION
Mount the belt grinding attachment (6-1/3) using
the recesses on the grinding spindle (6-1/1) and
the bolts (6-1/2).
Tighten the (6-2/1) using a ring spanner (SW 10).
Figure 6-2 Mounting the belt grinding attach-
ment
Figure 6-1 Mounting the belt grinding attach-
ment
6. Commissioning
1
2 3
1

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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, be-
fore 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 is 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 Concave grindingConvex 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

20
There is a risk that hands, hair, and clothing may be pulled in while the
grinding machine is switched on.
This can result in serious injury.
CAUTION
7.2 Grinding sickle-shaped cutter knives on the wet-grinding belt
Mount the HV 161 belt grinding attachment
according to the instructions (see Chapter 6).
Remove grinding lever (7-2/1).
7.2.1 Adjusting the grinding angle
For setting the desired grinding angle, insert the
matching spacer disc (7-2/1) on the locating bolt
(7-2/2).
Spacer discs for 25° and 27° are located to the left
of the device (3-2/5).
7. Operation
Figure 7-2 Spacer discs for grinding angle
adjustment
1
2
Figure 7-1 Mounting the belt grinding attach-
ment
1

21
7. Operation
7.2.2 Mounting the grinding plate
The grinding plate (7-3/1) is placed over the spacer
discs (7-2/1).
The follower pin of the locating bolt (7-3/2) must
engage in the driver bore of the grinding plate
(7-3/1).
Using the grinding lever (7-4/1), the grinding plate
(7-4/2) is fixed to the belt grinding attachment
(7-4/3).
For that, turn the grinding lever (7-4/1) on the
locating bolt (7-4/4) in clockwise direction.
7.2.3 Clamping on the cutter knife
When clamping the knife, swivel back the grind-
ing plate (7-5/2) and grinding lever (7-5/1).
The knife (7-5/3) is clamped onto the grinding
plate (7-5/2) by inserting the bolts (7-5/6) of the
grinding plate into the holes on the knife (7-5/3).
The knife is locked to the grinder (7-5/5) by turn-
ing the bolts left.
Figure 7-3 Mounting the grinding plate
Figure 7-4 Attaching the grinding plate with
grinding lever
1
2
1
4
3
2
Figure 7-5 Tightening the cutter knife to the
grinding plate
1
2
3
6
5