Mill-Thread Technical Section

Transcription

1 ill-thread Technical Section Contents: age: Contents: age: Conversion of to Rotational Tool Selection Carmex ill-thread Catalogue and CC rogramming Software Example of Thread illing CC rogram for Internal Threading ill-thread Inserts Carbide Grades, and Feed Selection Spiral ill-thread Inserts, and Feed Selection Spiral Finish, and Feed Selection D-Thread type CT type ill-thread Solid Carbide Grades, and Feed Selection T, TB, TZ, ET types TQ type ini ill-thread (TS) and TI types DT type DTH type ini ill-thread (TSH) type TH type

2 ill - Thread Technical Section Conversion of to Rotational Conversion of selected cutting speed to rotational speed is calculated by the following formula: Example: V=400 D= D= diameter Internal Thread External Thread 152

3 ill - Thread Technical Section Tool Selection For indexable and solid carbide ill Threads The following chart provides a fairly accurate visual selection tool for Internal Threading. The chart is suitable for the following thread forms:, U, WHIT, T, TF, BST and G Any tool with a small cutting diameter can produce larger diameter threads. Example: Internal thread 11/4 x 16U: Find a illing Tool to produce d=1.25 Internal right hand U thread with a thread pitch =1/16 inch As can be seen from the chart above, the two red lines intersect at a selected tool with a cutting diameter of D=79 inch Chosen toolholder: SR0790 H21 Insert: 21 I 16 U /16 If you need assistance, please call your local distributor and ask for help in selecting the appropriate tool as well as for a CC program to suit your CC milling machine. 153

4 ill - Thread Technical Section Carmex ill-thread catalog and CC programming Software This software is provided by Carmex to assist you, the threadmilling user, to select and apply the correct tool to machine threads on CC machining centers. The program will find tools and inserts which are suitable for your application, calculate cutting data and generate a CC program for a variety of controls. The software is available at our web site and on a CD-RO. Example of Thread illing CC rogram for Internal Threading Right hand thread (climb milling) from bottom up. rogram is based on tool center. This method of programming needs no tool radius compensation value other than an offset for wear. General rogram G90 G00 G54 G43 H1X0 Y0 Z10 S--- G00 Z- ( TO THREAD DETH ) G01 G91 G41 D1 X(A/2) Y-(A/2) Z0 F--- G03 X(A/2) Y(A/2) R(A/2) Z(1/8 ITCH) G03 X0 Y0 I-(A) J0 Z(ITCH) G03 X-(A/2) Y(A/2) R(A/2) Z(1/8 ITCH) G01 G40 X-(A/2) Y-(A/2) Z0 G90 X0 Y0 Z0 Internal Thread EXALE : 11/4-12U (Thread depth.71) TOOLHOLDER : SR0790 H21 ( Dia..79) ISERT: 21 I 12 U A = ( )/2 =.23 G90 G00 G54 G43 H1X0 Y0 Z0.39 S2800 G00 Z-0.71 G01 G91 G41X Y Z0 F3.35 D1 G03 X Y R Z G03 X0 Y0 I-0.23 J0 Z G03 X Y R Z G01 G40 X Y Z0 G90 G0 X0 Y0 Z0 154

5 ill - Thread Technical Section ill-thread Inserts and Feed Selection Sub-icron Grade with Titanium Aluminum itride multi-layer coating ( K10 - K20). This is a general purpose grade, which can be used with all materials; it should be run at medium to high cutting speeds. Recommended FEED RATE: Spiral ill-thread Inserts and Feed Selection Low and edium Carbon Steels High Carbon Steels Alloy Steels, Treated Steels Stainless Steels Cast Steels K Cast Iron on-ferrous & Aluminum Synthetics, Duroplastics, Thermoplastics S ickel Alloys, Titanium Alloys Sub-icron Grade with Titanium Aluminum itride multi-layer coating ( K10 - K20). This is a general purpose grade, which can be used with all materials; it should be run at medium to high cutting speeds. Low and edium Carbon Steels High Carbon Steels Alloy Steels, Treated Steels Stainless Steels Cast Steels K Cast Iron on-ferrous & Aluminum Synthetics, Duroplastics, Thermoplastics S ickel Alloys, Titanium Alloys Recommended FEED RATE: As you may note, cutting speed is shown in range terms. In most standard cases choosing a speed in the middle of the range would be a good choice for a start. For hard metals reduce cutting speed. 155

6 ill - Thread Technical Section Spiral Finish and Feed Selection Sub-icron Grade with Titanium Aluminum itride multi-layer coating ( K10 - K20). This is a general purpose grade, which can be used with all materials; it should be run at medium to high cutting speeds. () Low and edium Carbon Steels High Carbon Steels Alloy Steels, Treated Steels Stainless Steels Cast Steels K Cast Iron on-ferrous & Aluminum Synthetics, Duroplastics, Thermoplastics S ickel Alloys, Titanium Alloys

7 ill - Thread Technical Section Data D-Thread type Sub-icron Grade with Titanium Aluminum itride multi-layer coating ( K10 - K20). This is a general purpose grade, which can be used with all materials; it should be run at medium to high cutting speeds. () Low and edium Carbon Steels <0.55%C High Carbon Steels 0.55%C Alloy Steels, Treated Steels Stainless Steels - Free Stainless Steels - Austenitic Cast Steels K Cast Iron Aluminum 12%Si, Copper Aluminum >12% Si Synthetics, Duroplastics, Thermoplastics S ickel Alloys, Titanium Alloys Recommended FEED RATE:

8 ill - Thread Technical Section Data CT type Sub-icron Grade with Titanium Aluminum itride multi-layer coating ( K10 - K20). This is a general purpose grade, which can be used with all materials; it should be run at medium to high cutting speeds. Thread illing start position arc entrance Diameter=D Low and edium Carbon Steels <0.55%C High Carbon Steels 0.55%C Alloy Steels, Treated Steels Stainless Steels - Free Stainless Steels - Austenitic Cast Steels K Cast Iron Aluminum 12%Si, Copper Aluminum >12% Si Synthetics, Duroplastics, Thermoplastics S ickel Alloys, Titanium Alloys H Hardened Steel 45-50HRc Hardened Steel 50-55HRc end point Thread illing arc exit 158

9 ill - Thread Technical Section ill-thread Solid Carbide Grades, and Feed Selection T, TB, TZ, ET Types Sub-icron Grade with Titanium Aluminum itride multi-layer coating ( K10 - K20). This is a general purpose grade, which can be used with all materials; it should be run at medium to high cutting speeds. Low and edium Carbon Steels <0.55%C For cutters with long cutting length reduce feed rate by 40% Diameter=D High Carbon Steels 0.55%C Alloy Steels, Treated Steels Stainless Steels - Free Stainless Steels - Austenitic Cast Steels K Cast Iron Aluminum 12%Si, Copper Aluminum >12% Si Synthetics, Duroplastics, Thermoplastics S ickel Alloys, Titanium Alloys

10 ill - Thread Technical Section TQ type Sub-icron Grade with Titanium Aluminum itride multi-layer coating ( K10 - K20). This is a general purpose grade, which can be used with all materials; it should be run at medium to high cutting speeds. Diameter=D Low and edium Carbon Steels <0.55%C High Carbon Steels 0.55%C Alloy Steels, Treated Steels Stainless Steels - Free Stainless Steels - Austenitic Cast Steels K Cast Iron Aluminum 12%Si, Copper Aluminum >12% Si Synthetics, Duroplastics, Thermoplastics S ickel Alloys, Titanium Alloys start point Thread illing start position (1. entry) Thread illing (1. entry) Thread illing start position (2. entry) Thread illing (2. entry) end point 160

11 ill - Thread Technical Section ini ill-thread TS and TI types Sub-icron Grade with Titanium Aluminum itride multi-layer coating ( K10 - K20). This is a general purpose grade, which can be used with all materials; it should be run at medium to high cutting speeds. T8 Sub-icron Grade with Aluminum Titanium itride (AlTi) multi-layer coating ( K10-K20). Extremely high heat resistant and smooth cutting operation, for high performance, and normal machining conditions. General purpose for all materials. T11 Ultra-fine sub-micron grade with advanced VD triple coating. Standard Low and edium Carbon Steels <0.55%C Diameter = D High Carbon Steels 0.55%C Alloy Steels, Treated Steels Stainless Steels - Free Stainless Steels - Austenitic Cast Steels K Cast Iron Aluminum 12%Si, Copper Aluminum >12% Si Synthetics, Duroplastics, Thermoplastics S ickel Alloys and Titanium Alloys start point center location arc entrance thread milling arc exit end point ini ill-thread vs. Taps Features ini ill-thread Taps Thread surface quality High edium Thread geometry Very accurate edium Thread tolerances 4H, 5H, 6H with std cutter 6H with standard tap, 4H with specific tap achining time Same as tap or shorter Short Tool breakage Almost not possible Could happen often achining load Very low High Range of thread diameters Wide range of diameters Specific tap for each diameter Right/Left hand threading Same cutter Specific tap for each Geometric shape Full profile artial profile 161

12 ill - Thread Technical Section DT type Sub-icron Grade with Titanium Aluminum itride multi-layer coating ( K10 - K20). This is a general purpose grade, which can be used with all materials; it should be run at medium to high cutting speeds. Diameter=D Low and edium Carbon Steels <0.55%C High Carbon Steels 0.55%C Alloy Steels, Treated Steels Stainless Steels - Free Stainless Steels - Austenitic Cast Steels K Cast Iron Aluminum 12%Si, Copper Aluminum >12% Si Synthetics, Duroplastics, Thermoplastics DTH type T Ultra-fine Sub-icron grade with advanced VD triple Blue coating Low and edium Carbon Steels <0.55%C Diameter=D High Carbon Steels 0.55%C Alloy Steels, Treated Steels Stainless Steels - Free Stainless Steels - Austenitic Cast Steels K Cast Iron S H Aluminum 10%Si, Copper Aluminum >10% Si Synthetics, Duroplastics, Thermoplastics ickel Alloys, Titanium Alloys and High Temp. Alloys Hardened Steels HRc Hardened Steels HRc

13 ill - Thread Technical Section ini ill-thread TSH type T9 Sub-icron Grade with advanced VD triple coating. Left hand cutting for CC code use 04 S ickel Alloys, Titanium Alloys and High Temp. Alloys Hardness HRc Diameter = D H Hardened Steels start point center location arc entrance thread milling arc exit end point Case Study Application Thread Depth Workpiece aterial Hardness Cutter Description achining Conditions achine Control Cooling Lubricant Tool Life (o. of Threads) Internal Thread 4 X mm Tool Steel: D (HRc) TSH0250C : 144 ft / min Feed: Inch / tooth ori Seiki V5000 Fanuc Emulsion

14 ill - Thread Technical Section TH type T11 S Sub-icron Grade with advanced VD triple coating. ickel Alloys, Titanium Alloys and High Temp. Alloys Hardness HRc Diameter = D H Hardened Steels Cast Iron For cutters with long cutting length reduce feed rate by 40% ositioning Chamfering Thread illing 164