slewing ring soft zone using method
DE102008033735A1 - Method for hardening at least one
The invention relates to a method for hardening at least one raceway (2) of a bearing race (1) for a slewing bearing with the aid of two inductors (3, 4) movable in opposite directions to one another along the raceway (2) Close the end zones (30) to the smallest possible distance. According to the invention additional measures to equalize the heating of the track (2) in the …
slewing ring soft zone - From XZWD
Jan 23, 2018· The soft zones of crane and excavator machinery should be in the place which forms a 90 degree angle with the arm support direction ( the maximum load direction). It is a necessary consequence to have the soft zone of the slewing ring during its production process, the soft zone occurs during surface quenching technique.
FAQ – Kyoei Seiki
If you found the Slewing Ring is too loose to turn, please go to the maintenance guide and look for the clearance measurement method, which is the method that all OEM factories are using. Kyoei’s Slewing Rings clearance is either based on JIS or genuine part standards.
Slewing Bearing Installation Schematic – JIEHON SLEWING
The slewing ring of the slewing bearing has a hardened soft zone, which is marked with S on the end face of the ferrule. When installing, the flexible tape should be placed in the non-load zone or in the non-recurrent zone (the plug hole is always loed in the soft zone.
Tips For Installing A Slewing Bearing’s Soft Zone
Nov 02, 2019· For example, the upper ring soft zone of the slewing bearing of the reclaimer is to be mounted at a position perpendicular to the center line of the cantilever and cut through the center of rotation. Usually the designer designs this position to be the most stressed state of the slewing bearing.
Excavator slewing bearing solution for broken teeth | HGB
May 15, 2019· 3. Gradual hardness gear slewing bearing. Since the broken teeth of the slewing ring are caused by the extrusion, how to prevent the large and small gears from being squeezed is the key point. When the gear is induction hardened, the gear heating section is divided into three sections: normal hard zone, transition zone and soft zone.
Estimating Soil Moisture - USDA
in the plant root zone of the soil. The "feel and appearance method" is one of several irrigation scheduling methods used in IWM. It is a way of monitoring soil moisture to determine when to irrigate and how much water to apply. Applying too much water causes excessive runoff and/or deep percolation. As a result, valuable water is lost
installation of a new slewing ring
Positioning of the soft zone The raceway tracks of a slewing ring are hardened, the process of hardening these has a beginning an a end as the hardening may not overlap there is a small gap where there is no hardening. That is the so called soft zone of the slewing ring. This position is marked on the outside of every slewing ring.
Maintenance method of slewing bearing | LDB
Jul 26, 2021· The slewing bearing and slewing ring should be repaired and maintained to reduce the deformation of the slewing ring support. The support should be asseled during assely. The contact surface with the slewing bearing must be cleaned. 2. When using slewing bearings and slewing bearings, attention should be paid to changes in noise and …
Induction Heating for Hardening Appliions | Induction
Induction hardening of slewing ring without soft zone Induction is the cost-cutting alternative to furnace case hardening of small- and medium-sized gears. Quenching of a small gear that has been heated by the simultaneous multi-frequency method.
Tower crane safety
Tower cranes are widely used for lifting operations in the construction industry. Statistics show that tower cranes contribute to quite a nuer of serious accidents. Property damage and bodily injuries can be avoided if they are properly used. Tower cranes are a modern form of balance crane that consist of the same basic parts. Fixed to the ground on a concrete slab (and …
TRAPEZITZA - mtip.gov.mt
The slewing ring bearing is a key component on cargo deck cranes. The main soft zone in the outer bearing radial housing. 17 2.4 Slewing Bearing Design and Testing 2.4.1 Interpretation of the rocking test results this method may be subject to numerous flaws. Of most concern is the fact that the measuring points are loed in a
Web alogue slewing bearings - Liebherr
Web alogue slewing bearings - Liebherr. Slewing bearings for all appliions. To date, Liebherr has manufactured over 350,000 slewing ring bearings for use around the world. In addition to a variety of products, our customers appreciate the appliion-specific engineering and outstanding quality. Diverse slewing bearings.
Causes of quenching soft spots of slewing bearings | LDB
Nov 22, 2021· After understanding the reasons for the soft spots or soft bands of the slewing bearing, the method to improve the existing soft spots can be through annealing, normalizing, and high temperature tempering, followed by re-quenching according to the normal process, or re-quenching after recarburizing.
(PDF) Modelling of rollers in calculation of slewing
A model of a three-row roller slewing bearing for the computation of carrying capacity using “ rigid rings ” method. 42 L. Kania et al. / Mechanism and Machine Theory 58 (2012) 29 – 45
News about slewing ring beairng - Page 7
Slewing Ring Soft Zone Date： 2019.Feb.13 The raceway tracks of a slewing ring bearing are hardened,the process of hardening these has a beginning an a end as the hardening may not overlap there is a small gap where there is no hardening.
slewing ring soft zone | uwebearing
Aug 16, 2014· the soft zone is the disadvantage of the use of the slewing bearing, if the the soft zone is in the correct installation position on the main machine, the effect of this disadvantage of the slewing ring will be decreased, so the installation position on the main machine is at the non-loaded zone on the slewin bearing in principle, or at light …
Construction, Working and Maintenance of Stackers and
the pile. The Windrow method is preferred in cases where the reclaimer is only operating in one part of the pile cross section at a time or in cases where segregation would make an open pile base unacceptable. Sometimes stacking is carried out by Strata method. The Strata method needs a luffing and slewing stacker. In the Strata stacking method
Computation of the general carrying capacity of slewing
A precise computation method was proposed for the static load-carrying capacity curves of such pitch bearings, which can be used to pre-select pitch …
(PDF) Modelling of rollers in calculation of slewing
A model of a three-row roller slewing bearing for the computation of carrying capacity using “ rigid rings ” method. 42 L. Kania et al. / Mechanism and Machine Theory 58 (2012) 29 – 45
Technical analysis of slewing bearing material (42CrMo
Aug 04, 2021· For example, comparison 1, the wooden board above is equivalent to hardened layer, the cement and sand below are equivalent to the tempered slewing bearing ring, if the hardened layer depth is same, the tempered ring is one hard and the other soft, it’s like wooden boards with the same thickness pressed on the cement and sand, obviously the wooden board …
Technical analysis of slewing bearing material (42CrMo
Aug 04, 2021· For example, comparison 1, the wooden board above is equivalent to hardened layer, the cement and sand below are equivalent to the tempered slewing bearing ring, if the hardened layer depth is same, the tempered ring is one hard and the other soft, it’s like wooden boards with the same thickness pressed on the cement and sand, obviously the wooden board …
Lifting and Hoisting Procedure Inspection Testing and
Slew Ring . Slew ring rocking clearances shall be taken and recorded annually by the Owner. The clearances shall be compared against the maximum allowable, specified by the crane manufacturer. A log shall be kept showing the rocking clearances trend against the allowable rocking clearance limit, the log shall be kept for a minimum of 6 years.
Slewing Bearing – Part 01 – T-Blog, Your Bearing Wikipedia
Jul 03, 2020· Slewing Bearing, also known as slewing ring bearing, turntable bearing, slewing ring, etc, is widely used in modern industries. Types of Slewing Bearing. Single-row ball type (01 series, HS series, Q series) Double-row ball type (02 series) Three-row roller type (13 series) Single-row cross roller type (11 series) Double-row ball type (07 series) )
tunnels and underground excavations - Tunneling techniques
tunnels and underground excavations - tunnels and underground excavations - Tunneling techniques: Tunnels are generally grouped in four broad egories, depending on the material through which they pass: soft ground, consisting of soil and very weak rock; hard rock; soft rock, such as shale, chalk, and friable sandstone; and subaqueous. While these four broad types of …
Induction Hardening for Wind Turbine Bearing Rings | Gear
Jul 16, 2015· The first two egories refer to a process where an induction coil, or coils, scans (i.e. moves) around a ring or bearing. However, using only a single coil results in a soft band in the ring. This is caused by the induction coil, as it completes its circuit of the ring, re-heating the zone it began from, essentially tempering the metal.
JBT2300-slewing bearings - SlideShare
Sep 13, 2015· Description on nameplate: Slewing bearing model Finished product nuer Weight (kg) Installation signage For the purpose of installing the bearing correctly, the Company attaches the following signs to the slewing bearing: Quenching soft belt sign Clogging of toothless ring (ball charge opening) A red circle drawn on toothed ring and marked
Web alogue slewing bearings - Liebherr
Web alogue slewing bearings - Liebherr. Slewing bearings for all appliions. To date, Liebherr has manufactured over 350,000 slewing ring bearings for use around the world. In addition to a variety of products, our customers appreciate the appliion-specific engineering and outstanding quality. Diverse slewing bearings.
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