MN 2012 Threading (4 Mb)
126Pages

Alphanumeric index – Tools Type Page Type A A..-SGXN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 A..-SGXN..-R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 C C.-CEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C.-CEL-..HD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C.-CER-..HD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Thread turning – Index Threading Page Code keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7 Selection process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Production methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Insert types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11 Grades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Thread turning - Code keys A = Steel with coolant passage CQ = For mounting upside down 7. Cutting edge length If the cutting edge length consists of only one digit, the designation should start with a 0. Cutting edge length

Thread turning - Code keys 1. Cutting edge length If the cutting edge length consists of only one digit, the designa- tion should start with a 0. Cutting edge length Cutting edge length Part profile: 6. Number of teeth per cutting edge/ Type of chipbreaker

Thread turning - Selection process Thread Turning Wizard™ In order to simplify the selection of tools and cutting parameters Seco Introduce the Thread Turning Wizard software, which eliminates complicated programming and calculations. The Wizard selects the optimum holder and Insert, identifies the best operating parameters and then downloads the Information to the CNC machine. The infeed series generated are based on a good control of the OD/ID tolerance for the selected profile. The insert nose radius is relatively small and can be damaged If it Is overloaded. The Wizard is free and...

Thread turning - Production methods The choice of production method is influenced by e.g. External or internal thread Right or left hand thread Right or left hand tool Threading towards the chuck • Originally fitted anvils can be used for most • Chip build-up may occur during Internal threading, particularly If there Is little space between the threading bar and bore of the Right-hand thread - Right-hand tool First choice Left-hand thread - Left-hand tool First choice Threading away from the chuck * ■ Chip flow Is correctly directed during internal threading. • Secure clamping of the Insert...

Thread turning - Insert types Use the guidelines below to choose suitable insert type • Single-tooth type • Multi-tooth type Single-tooth insert (Type S) A or First choice, can be used for applications in a vari- Multi-tooth insert (Type M) First choice for mass production, since fewer pass- Only for radial infeed. For single tooth inserts choose full profile or partial profile design Full profile By topping the thread, the workpiece need not be pre-machined to the exact diameter and may be a little oversized. The threading operation is simpli- fied since only one tool is needed for the...

Thread turning - Insert types Choose a suitable insert from the table in the catalogue 0 Grade (First choice for general applications Is CP500)

Thread turning - Insert grades SECO 3 CP500 - Universal grade for general threading • Suitable for most workpiece materials • Suitable for external and Internal threading • Suitable for most working conditions First choice for the different Seco material groups Use the tables beginning on page 103 to classify the workpiece material Use the table below to find the most suitable grade for each Seco material

Thread turning - Insert grades The black areas in the chart indicate a grade's main ISO application groups and the white areas indicate other supplementary application groups. First choice for high-strength steel, martensltic stainless steel, cast iron with low hardness, superalloys and titanium alloys. First choice for high cutting speeds. Hard micrograin with sharp edge, highly resistant to plastic deformation. Wear-resistant grade which is principally Intended for high cutting speeds. Optimizing grade In steel and stainless steel. Universal very tough micrograin grade for all types of...

Thread turning - Toolholders Use the guidelines below to choose suitable toolholder type. External threading_ Basic choice Type-C (clamp) CER/L Insert sizes (with anvil) Internal threading_ Basic choice Type-C (clamp) CNR/L Insert sizes (with anvil) Type-S (screw) Insert sizes (No anvil. To be used only when threading towards the chuck)

Thread turning - Toolholders Choose a suitable holder, see pages 61-68 Originally fitted anvil Q Alternative anvil for multi-tooth Insert The dimensions of the shank should be as large as possible, with consideration to machine, and chip evacuation. Minimize overhang to reduce vibration risk. Notice that the anvil must be exchanged when threading away nTOütins - Tottlhaldrn, Hiemal

Thread turning - Anvils Originally fitted anvils The table below shows the originally fitted anvils. These anvils are suitable for most operations when threading towards the chuck. To recewe the correct shape on the thread and uniform wear on the insert the cutting edge helix angle (X) should be the equal to the thread lead angle (tp). The same anvils are used for both right and left hand holders. The centre height remains constant. SNR/L toolholders have no exchangeable anvil and can therefore only be used for threading towards the chuck. The table below shows the available anvil range....