F&L TECHNICAL SALES INC.
  • Home
  • About
  • Principals
    • Blue Photon
    • Dorian Tool
    • Hannibal Carbide
    • Heritage Cutter >
      • Brubaker
      • Data Flute
      • Decatur Diamond
      • Weldon
    • Horn USA
    • Mate Workholding
    • mPower Workholding
    • Techniks Group >
      • Techniks
      • Parlec Inc.
  • News
  • Contact
    • Promotions

The 7 Most Common Deep Hole Boring Problems and Solutions

3/22/2022

0 Comments

 
Dorian Tool has some very detailed technical information in their Solution Tool catalog to address deep hole boring. First we're going to list the fundamental rules of selecting the correct boring bar and then take a deeper dive into the fundamentals of troubleshooting. 

If you want more information, technical specifications and much more detailed information on troubleshooting you can download the Solution Tool catalog below.
Picture

DEEP HOLE BORING
SELECTION CRITERIA

  • The diameter size of the boring bar is limited from the size of the hole diameter to be bored.
  • The boring bar should have the largest diameter possible for maximum cutting rigidity, but small enough to clear the hole for chip evacuation.
  • The Boring Bar has to be held with the maximum rigidity and the shortest overhang possible to maximize cutting stability and minimize vibration.
  • The selection and use of the right insert grade, geometry, nose radius and rake angle will be critical for a good surface finish and close working tolerance.
  • The cutting parameter is to be correct for the material machined in accordance of the insert manufacturing cutting data.
  • The hole, while machined has to be kept clear from chips to avoid tool breakage, boring bar vibration and the walls of the work piece undamaged.

7 MOST COMMON
DEEP HOLE BORING PROBLEMS

Poor Surface Finish, Poor Machining Tolerance & Poor Insert Life are the issues that every shop faces with cutting tools.  Deep hole boring is no different.  Below are some rule of thumb for a quick solution. As we said above, be sure to download the Solution Tool Catalog for much more technical information and solutions.
  1. Boring Bar Cutting Ratio: If the incorrect boring bar cutting ratio is used, the boring bar will vibrate.
  2. Boring Bar Diameter: Too small boring bar diameter will deflect under pressure and vibrate, too large boring bar diameter, will obstruct the evacuation of the chips.
  3. Boring Bar Holding System: When boring bar is not held properly and rigidly in the boring bar holder, vibration will develop when cutting. A split Boring Bar Holder must to be used.
  4. Boring Overhang:  When the boring bar is over extended it will vibrate (Steel bar 4 x Dia., Carbide bar 6 x Dia.,Solution Tool!™ (The NO! Vibration Re-Tunable Boring Bar) 8 - 14 x Dia.
  5. Incorrect Insert:  Incorrect insert geometry, nose radius, rake angle, chip breaker, and clearance angle will cause vibrations.
  6. Cutting Parameter:  When wrong cutting parameters are used for the specific material to be bored, and for the operation to be executed, the boring bar will not perform properly.
  7. Chip Clogging:  When chips are clogged into the work piece bore, jamming the insert, wrapping around the boring bar, and thrown against the wall, the insert will be damaged.
0 Comments

Knurl Cutting vs Knurl Forming

7/14/2021

0 Comments

 
There is sometimes confusion over the difference between Knurl Cutting and Knurl Forming and what is the best application to use for each method.  Here's a quick synopsis of the differences and ideal application solutions. 
Cutting Type Knurling tools create a knurling pattern by Material Removal.
For a Cutting Knurl, the knurl wheel’s axis is rotated to provide a leading edge, where the sharp edge will cut the knurl pattern into the work piece. Additionally, with a Cutting Knurl, less pressure is required for the operation and higher speeds and feeds can be used (use the same cutting data of High Speed or Cobalt turning tools). When Knurl Cutting, use full faced knurl wheels with a sharp edge, to penetrate into the work piece and cut the knurl pattern.
​Knurl Cutting is Best for:
  • Medium to Large Work piece Diameter 
  • Shoulderless Knurling
  • Long Work pieces with live centers
  • Hard Materials, High Temp Alloys, Stainless Steels 
  • Full Length Knurling Applications
  • Higher Production
​Knurl Cutting
Forming Type Knurling tools create a knurling pattern by Material Displacement.
In Forming Knurl, the knurl wheels axis is set parallel to the work piece axis, and forced against the work piece, displacing the material to form the knurl pattern. A large amount of pressure is required to displace the material that forms the knurl pattern. When Knurl Forming, use beveled edge wheels to protect the edge from chipping which will create a smooth surface finish.
Knurl Forming is Best for:
  • Small to Medium Work piece Diameter 
  • To the Shoulder Knurling
  • Long Centerless Work pieces
  • Soft Materials including Steels 
  • Band Knurling Applications 
  • Higher Surface Finish
Knurl Forming
0 Comments

How to Eliminate Knurling Wheel Double Tracking

6/17/2020

0 Comments

 
HOW TO ELIMINATE KNURLING WHEEL DOUBLE TRACKING
Double Tracking means that the knurling wheels are not tracking properly. In this situation, the knurling wheels will create a different pattern than the original design and may overlap or "double die"

There are two main causes of a knurling tool double tracking: 
  1. The knurl wheel isn’t set deep enough into the workpiece.  Dorian Tool recommends increasing the depth. The knurl depth should always equal 35% of the knurl pitch.
  2. The circumference of the work piece blank is not a multiple of the knurl pitch. To correct this, you must change the before-knurl diameter of the part or select a knurl wheel with a different pitch.

Dorian Tool  has developed a “Knurling Calculator Spreadsheet” that can calculate all of the parameters to avoid double tracking.

If you would like to request an electronic copy send us a note in the comments section below or, for faster results, in the form you get when you click the button below.  We'll quickly get a spreadsheet sent over to you!
Contact F&L Technical Sales
0 Comments

CNC Turret Replaces Lathes Manual Tool Post

8/14/2019

0 Comments

 
Tech Tips: Dorian Tool
Installing a turret can give a real productivity boost for shops. With a CNC turret, more tools can be carried at one time.
Dorain Tool post CNC turning
Turning Application with a Manual or CNC Toolroom Lathe 1.Quick Change Tool Post 2.Quick Change Turning and Facing Toolholder 3.Square Shank Toolholder 4.Insert 5.Workpiece 6.Chuck 7.Custom T-Nut
The lathe is one of the oldest and most versatile machine tools. Few shops can do without the processing capability offered by the CNC lathe. Long before automatic toolchangers were applied to milling machines, the lathe had a multiple-tool configuration. The tool post gave lathe users the ability to select from several mounted tools and index them as needed during a turning cycle.

Many CNC lathes are still offered with the manual tool post design. Shops can generally purchase these machines at very reasonable prices. Some shops have found a need to increase the flexibility of these lathes by adding an indexable turret in place of the manual tool post.
Picture
Installing such a turret can give a real productivity boost for shops running on Colchester, Harrison, Nardini, Bridgeport, Southwest Industries and other popular combination CNC lathes. With a CNC turret, more tools can be carried at one time. Programming the turret brings the right tool into the cut at the right time automatically. No stopping the machine to index a manually operated tool post is needed so cycle times are reduced for applications that use more than one tool.

For many turning applications a manual tool post has sufficient capacity. But any shop that is looking for a through-put gain in their turning operation without a major investment in new machine tools, can benefit by considering installation of a CNC turret.

The issue is more about processing efficiency than tool capacity, says lathe accessory maker, Dorian Tool (East Bernard, Texas). A turret configuration allows the machine tool to carry tools mounted in operation sequence. Sometimes turret tool capacity is sufficient for more than one job to run without a tooling setup in between. But significant production time is saved by the ability to automatically index the tool turret as part of the lathe's part processing program.

The turret offered by Dorian Tool is a bi-directional unit. Indexing therefore takes the shortest part from one tool station to another. It's operated by a three-phase 220/380 volt 50/60 hertz electric motor through an anti-backlash gear drive. Tool position is controlled by an absolute encoder which tracks actual position of the tool station. The working position of the turret can be right or left hand depending on the unit location ahead of or behind the lathe's spindle axis.

A proximity switch detects tool position and verifies turret lockup before a go signal is sent to the CNC. A three-piece Hirth-type coupling is used to hold the clamped turret radially. The turret indexes, station-to-station under one second. Fast index is achieved by not lifting the turret face. The entire indexing mechanism is housed in a Meehanite grade casting that helps damp cutting induced vibrations.

Four standard sizes of turrets are available. They are 100, 120, 160 and 200 mm respectively. Toolholding capacities of eight or 12 stations are available in ID, OD or combined tooling configurations.

Tool capacities range from 12 to 32 mm (1/2 to 1-1/4 inches). A VDI turret disk is available. Both turret disks have an integral coolant delivery system.

Simple electrical and coolant connections easily interface with the lathe. If an indexable turret is the difference between a CNC lathe and a CNC turning center, then this accessory is a cost effective way to up-grade your lathes.



0 Comments

How To Eliminate Double Tracking of your Knurling Tool

4/17/2019

3 Comments

 
Tech Tip: Dorian Tool
How To Eliminate Double Tracking of your Knurling Tool
Double Tracking means that the knurling wheels are not tracking properly.

In this situation, the wheels will
create a different pattern than what the design was originally made for.  There are two main causes of this scenario:
  1. The knurl wheel isn’t set deep enough into the workpiece. We recommend increasing the depth. The knurl depth should always equal 35 percent of the knurl pitch
  2. The circumference of the work piece blank is not a multiple of the knurl pitch. To correct this, you must change the before-knurl diameter of the part or select a knurl wheel with a different pitch.

Dorian Tool Developed a “Knurling Calculator Spreadsheet” that can calculate all of the parameters to avoid double tracking. Request an electronic copy by emailing us at: sales@fltechnical.com
3 Comments

    ABOUT

    This is where we publish technical articles, applications stories, tip and tricks, new product announcements and press releases.

    Archive

    June 2022
    May 2022
    April 2022
    March 2022
    February 2022
    January 2022
    December 2021
    November 2021
    October 2021
    September 2021
    August 2021
    July 2021
    June 2021
    May 2021
    April 2021
    March 2021
    February 2021
    January 2021
    December 2020
    November 2020
    October 2020
    September 2020
    August 2020
    July 2020
    June 2020
    May 2020
    April 2020
    March 2020
    February 2020
    January 2020
    December 2019
    November 2019
    October 2019
    September 2019
    August 2019
    July 2019
    June 2019
    May 2019
    April 2019
    March 2019
    February 2019
    January 2019
    December 2018
    November 2018
    October 2018
    September 2018
    August 2018
    July 2018
    June 2018
    May 2018
    April 2018
    March 2018

    Categories

    All
    52/96 Workholding
    Adhesive Workholding
    Aerospace Manufacturing
    Allen Benjamin
    ATC Alignment
    Blue Photon
    Boring
    Broaching
    BT Holders
    Carbon Fiber
    Case Study
    CAT Holders
    Chamfering
    Coatings
    Collet Nut
    Collets
    Composite Machining
    Countersink
    Deburring
    Decatur Diamond
    Definitions
    Diamond CVD
    Diamond PCD
    Dorian Tool
    Drilling
    Eastec
    End MIll
    EZ Burr
    Fixturing
    Fretting
    Geometry
    GMN Spindle
    Graphite Machining
    Grooving
    GWS Tool Group
    Hannibal Carbide
    High Speed Whirling
    Horn USA
    Hydraulic Toolholder
    IMTS
    Inserts
    JET Whirling
    ​Knurl Cutting
    Knurl Forming
    Knurling
    Mate Workholding
    Medical Device
    Medical Manufacturing
    MegaFORCE
    Modern Industries
    ModLOC
    MPower
    Nexturn Swiss
    North American
    Parlec
    Practical Machinist
    Pull Studs
    Reamers
    Retention Knobs
    Screw Threads
    ShrinkLOCKED
    Slot Cutting
    Slot Milling
    SpeedLOC
    Spindle Repair
    Spindle Wear
    Taps
    Taps: Bottom
    Taps: HSSE
    Taps: Plug
    Taps: Roll Form
    Taps: Taper
    Techniks
    Tech Tip
    Threadmilling
    Toolholders
    Troubleshooting
    Turbo-Whirling
    Turret
    USMTO
    Weldon Tool
    Workholding
    Zero Point

    RSS Feed

Home
About
Principals
Contact
F&L Technical Sales Logo Square
F&L Technical Sales Inc.
326 Woodland Way
Russell, MA 01071
Established 1999
© 2022 F&L Technical Sales Inc.
All Rights Reserved
site design: Rapid Production Marketing
  • Home
  • About
  • Principals
    • Blue Photon
    • Dorian Tool
    • Hannibal Carbide
    • Heritage Cutter >
      • Brubaker
      • Data Flute
      • Decatur Diamond
      • Weldon
    • Horn USA
    • Mate Workholding
    • mPower Workholding
    • Techniks Group >
      • Techniks
      • Parlec Inc.
  • News
  • Contact
    • Promotions