Betek Trenching Training 2015

transcript

BETEK GmbH & Co. KG · Titel der Präsentation · 11.06.2012

Weiterkommen!

BETEK GmbH & Co. KG · Trenching Training · 20.01.2015

BETEK Training Presentation

Trenching

Table of Contents:

• Trenching machine Types

• Wear Parameters / Overview

• Cutting Tool Parameters

• Tool dimensions

• Fixing Systems

• Tungsten Carbide Grade/ Shape

• Wear Patterns

• Cutting Tool Overview and Selection

Trenching

„Big“ Machine Types:

Chain Trenching Machine Wheel Trenching Machine

Bucket Trenching Machine

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„Big“ Machine Types:

Terrain Levelling Machine

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„Small“ Machine Types:

Chain Trenching Machine

Wheel Trenching Machine

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Influences on pick wear:

• Cutting speed

• Cutting pressure

• Material strength

• Material characteristic

• Abrasion

• Density

• Quartz contents

• Cooling

• Weather

• Rotation

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Cutting tool parameters/ components:

Tungsten Carbide style / gradeHead length

Head diameter

Shank diameter

Shank styleFixing system

Steel hardness

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Shank Systems:

Straight Shank Ø11/ 14/ 18,65/ 19,4/ 20/ 22/ 25,4/ 30mm:

Step Shank 38/30mm:

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Fixing Systems:

internal Systems:

Clip Ring (short retainer)

Sleeve (long retainer)

external Systems:

Snap Ring (Seeger ring)

Lock Ring

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Fixing Systems (internal Systems):

Clip Ring (short retainer) Sleeve (long retainer)

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Fixing Systems (external Systems):

Snap Ring (Seeger ring) Lock Ring

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Installation of external lock rings with BETEK device BZ35:

Device: BZ35

Lock ring: SI35/22

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Disassembly of external lock ring SI35/22 with tool BZ34

Device: BZ34

Lock ring: SI35/22

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Head Shapes:

Bottom diameter influences:

Toolholder protection

Resistance against breakage

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Head Shapes:

Head Length influences:

Penetration

Granulate size

Productivity

Toolholder protection

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Head Shapes: The head length influences the toolholder protection

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Tungsten Carbide Shapes:

Cylindrical Style:

Maximum toughness

For hard condition

Heavy impacts

Cap Pin Style (CP):

Good abrasion resistance

Medium protection of the steel body

Reducing steel wash

Medium hard condition

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Tungsten Carbide Shapes:

Cap Style

Best abrasion resistance

Good protection of the steel body

Reducing steel wash

Soft to medium hard condition

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Tungsten Carbide Grade: B10G

Tungsten Carbide: 94%

Cobalt: 6%

Ø Grain Size: 20µm

High wear resistance!

Tungsten Carbide Grades:

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Tungsten Carbide Grade: B20G

Tungsten Carbide: 91,5%

Cobalt: 8,5%

Ø Grain Size: 20µm

High wear resistance!

Tungsten Carbide Grades:

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Wear pattern on Tungsten Carbide Inserts:

Broken tungsten carbide:

Wrong TC-Grade

Ø too small

Heavy impact on „steelbars“ or r boulders

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Reptile Skin:

Less TC wear

High and many temperature changes

Wear pattern on Tungsten Carbide Inserts:

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Chain design for „Hard Rock“ application:

Full coverage pattern

Ejector plate Side cutter

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Wear pattern:

Bad rotation of the cutting tool:

Too small axial clearance

Too small radial clearance

Sticky material

Worn tool holder

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Worn tool holder by:

Broken cutting tools

To late monitoring of the cutting b tool wear

Result:

No proper seat for new tools

Easy shank breakage

Non rotating tools

Replacement of the tool holder necessary!

Wear pattern:

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Wear pattern broken cutting tool:

Reasons:

Not professional heat treatment d (to hard and brittle)

Heavy shock

Head length to much

Shank system to small

Improvements:

Reduction head length

Increase the holder system

(if possible)

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Wear pattern:

Bad rotation of cutting tools by:

Sticky material

Unproper cleaning of the 00 tool holders bore hole

Clean always the bore hole before fixing a new cutting tool!

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A large axial clearance by worn tool holder:

Demolition of the snap ring

Breakage of the snap ring

Replacement time for thecutting tools will increase

High risk of tool loss

Wear pattern:

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Wear pattern:

Replacement time for thecutting tools will increase

High risk of tool loss

A large axial clearance by worn tool holder:

Demolition of the snap ring

Breakage of the snap ring

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Toolholder with groove for clip ring:

Depose of material in the groove

Prevents tool from rotation

Using tool holder without iiiiigroove when not required!

Wear pattern:

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Soft material: Means less wear on the TC

The tools are longer on the chain -> longer time for steel wear

Breaking out or loss of cylindrical TC pins

Solution: Cap Style TC

Wear pattern:

Trenching

Cap Style TC

Head Ø = Holder Ø

Optimum TC wear

Wear of steel and TC are vvvcorresponding

Economic tool

Wear pattern:

Trenching

Cylindrical TC in Soft Conditions:

Head Ø = Holder Ø

TC is not protecting the steelbody

Risk of TC loss

Cap style Tungsten Carbide tip recommended!

Wear pattern:

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Proper rotating cutting tool with cap style tip:

Tungsten carbide used iiiiialmost to the end

Tool holder protection iiiiicould be better

Wear pattern:

Trenching

Cap style TC tip broken by bolders, used on side cutters

Wear pattern:

Trenching

Side cutters with larger Carbide Tip Ø 25mm CP Style

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Side cutters with larger carbide tip Ø and larger steel body

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BKF12 (Ø19mm) in the middle of the chain

BKF11(Ø22mm) on the side cutters

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Additional protection of the Chain Base Plate

Weld on tooth: BFZ35M reduces the rewelding efforts

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Additional protection of trenching wheels with TungStuds

Side protection on fast running wheels

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Additional protection of trenching chains with TungStuds

Side protection on every second plate

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Overview BETEK Product Series

Shank Ø sleeve short retainer external snap ring external lock ring

14 BM BM

18,65 BTR BTR

19,4 BSH BSK BC

20 BSH

22 BC BC

25 BTK BTK

30 BGK BGS BGF

38/30 BKH BKS BKF

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BETEK Product Series: BTK/B40

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BETEK Product Series: BTK/BG25F

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BETEK Product Series: BKF/BS38F

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Walk behind Trencher: Weld on tooth :

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Thank you for your attention!

Betek Trenching Training 2015

Engineering