INSTRUCTIONS FOR USE LA, MAMMUT & STR KNURLING TOOLS

Transcription

1 INSTRUCTIONS FOR USE LA, MAMMUT & STR KNURLING TOOLS

2 Contents CONTENTS 1. General Introduction Tool Construction LA-Tool Technical Data Overview: Main Components Tool Adjustment LA/KF Tool Adjustment LA/FL Mammut-Tool Technical Data Overview: Main Components Tool Adjustment M/KF Tool Adjustment M/FL Wear Parts Knurling of Stepped Workpieces Knurl Cutters with Bevel Troubleshooting Dimensions and Pitches Available Reference Values for Feeds and Cutting Speeds STR-Tool Technical Data Overview: Main Components Tool Adjustment STR

3 General Introduction 1. General 1.1 Introduction Please read through the Instructions for Use carefully before using the QUICK knurl cutting tools! The instructions have been written for operators with qualified training in the field of machining and cutting. Compliance with the Instructions for Use increases reliability in use, increases the service life of the tools, and prevents downtimes. We reserve the right to make alterations to the technical details of the tools by comparison with the information and illustrations contained in these Instructions for Use. Symbols in these instructions ATTENTION: This Symbol warns that operating procedures carried out without paying attention to the measures specified may lead to damage to the tool and/or the machine tool. NOTE: This Symbol refers to further information and provides additional information for using the Quick knurling tools. Text markups: This symbol identifies lists This symbol identifies an action sequence 2

4 1.2 Tool Construction QUICK knurl cutting tools are easy to operate and flexible in use due to their design, and may be employed on all lathes from conventional to CNCcontrolled automatic lathes, as a left-hand or righthand tool depending on the type of tool. General Tool Construction The tools have a cutting action, are free-cutting and it is not possible to make them adopt a specific speed ratio to the diameter of the workpiece by means of sustained forcing. As a result the number of teeth of the knurl produced may differ. The difference is approx. +/- 1-3 teeth depending on the pitch. Type of knurl DIN 82 Tool Knurl cutters Straight knurl RAA LA/FL, M/FL STR 30 L / 30 R Spiral knurl RBL / RBR LA/FL, M/FL As required Cross knurl RKE LA/KF, M/KF STR 15 L + 15 R Diamond knurl RGE LA/KF, M/KF STR 2 x 90 3

5 General Tool Construction Tool definition LA-model range LA knurl cutting tools are available in both righthand and left-hand versions. Use only tools marked R (right-hand version) in holders for right-hand cutting tools and tools marked L (left-hand version) in holders for left-hand cutting tools. left right left right Perfect results may be achieved with: Correct adjustment Closely following the instructions regarding the start of the knurling process Appropriate feed and cutting speed Selection of the correct tool size. QUICK knurl cutter tools with large dimensioned knurl cutters, e.g. Ø 42 mm instead of Ø 32, have a longer service life Tool definition Mammut-model range Knurl cutting tools of the Mammut range are only available in a right-hand version. NOTE: It is imperative to ensure an abundant supply of coolant or cutting oil directly onto the knurl cutters to ensure perfect cooling and lubrication of the knurl cutters. 4

6 LA-Tool Technical Data 2. LA-Tool 2.1 Technical Data LA/KF Types of knurl Cross and diamond Working range Ø mm Shank dimension 8x8, 10x10 or 12x12 mm / L or R Knurl cutters Ø 8.9 mm Cross 1 x 15 L and 1 x 15 R Diamond 2 x 90 Pitches see page 37 Weight 0.15 kg /10/12 LA/FL Types of knurl Straight and spiral Working range Ø mm Shank dimension 8x8, 10x10 or 12x12 mm / L or R Knurl cutters Ø 8.9 mm Straight 1 x 30 L / 30 R Spiral as required Pitches see page 37 Weight 0.13 kg /10/ (figure right-hand tool) 5

7 LA-Tool Overview: Main Components 2.2 Overview: Main Components Pos. Designation 1 Tool head 1.1 Cutter holder 2 Screw LA/KF A 9 10 A Washer 4 Knurl cutter 5 Bushing 6 Scale ring (diameter adjustment) 7 Index point 8 Clamping screw LA/FL 9 Shank 10 Adjusting screw tool correction A 9 10 A (figure right-hand tool) 6

8 2.3 Tool Adjustment LA/KF Preliminary work: Clamp workpiece and turn Maximum out-of-roundness 0.03 mm Step 1: Cutter selection Cross knurl: 1x 15 left-hand spiral toothed knurl cutter on cutter holder L 1x 15 right-hand spiral toothed knurl cutter on cutter holder R Diamond knurl: 2x 90 toothed knurl cutters L LA-Tool Tool Adjustment LA/KF Step 2: Install knurl cutters Clean the contact surface of bushing 5 and cutter holder 1.1. Coat bushing 5 and the face ends as well as the hole of knurl cutter 4 with a little Molykote G paste With knurl cutter 4 and washer 3 pushed on, insert bushing 5 into the cutter holder Screw in screw 2 and only tighten enough to allow knurl cutter 4 to rotate free of play LA/KF R R 7

9 LA-Tool Tool Adjustment LA/KF Step 3: Set diameter Measure off workpiece diameter Unscrew clamping screw 8 Turn scale ring 6 until the required diameter aligns with index point 7 Clamp clamping screw 8 Step 4: Clamp tool in tool holder Step 5: Pre-adjust turning centre The tool must be centered when used on conventional lathes NOTE: This adjustment does not apply when used on CNC machines as the tools are already centered. 8

10 Step 6: Re-align turning centre Carefully bring into contact with the workpiece Both cutters must be in contact simultaneously. Precision adjustment is carried out using adjusting screw 10 When adjusting by way of screw 10a, first loosen screw 10b and vice versa Tighten the opposing screw again hand-tight when adjustment is complete 10a LA-Tool Tool Adjustment LA/KF Sequence: Unscrew clamping screw 8 Adjust scale ring 6 slightly towards the next smaller diameter until the correct cutter setting is reached Tighten clamping screw Step 7: Adjust cutter The ideal position of the knurling cutters is when they lie parallel on the workpiece and still cut very slightly, i.e. the cutting edge of the cutters can be pressed in somewhat deeper (approx. 1-2 ). In the case of materials which are hard to machine, the knurling cutters may be inclined up to max b 9

11 LA-Tool Tool Adjustment LA/KF Step 8: Start of knurl The start of the knurl should be in a width no greater than 1,0 mm. With this width now move the tool to the full depth without interruption. The feed on infeeding should be approx mm. The knurling depth corresponds to the pitch of the knurling cutter being used, e.g. 1.0 mm pitch requires 1.0 mm infeed with reference to the diameter. The depth is measured from the knurling cutter's point of contact with the workpiece. After an idle time of 2-3 seconds, the workpiece is knurled by using the longitudinal feed. The surface deformation of the workpiece cannot be determined exactly as this is different from material to material. The knurling depth, however, should be sufficient to ensure that the knurl is only just sharp. max 1,0 mm ATTENTION: Under no circumstances knurl with longitudinal feed into the face edge of the workpiece. Starting the knurl within the workpiece can be done only in certain circumstances. NOTE: Note that the protective bevel at the beginning of the workpiece may not be applied until knurling is complete. The coarser the pitch, the smaller the feed. Feed and cutting speed have no effect on the knurl pitch. Step 9: Knurling NOTE: If the knurl is not accurate or is onesided, then the knurling process may be repeated after correcting the tool. 10

12 2.4 Tool Adjustment LA/FL Preliminary: Clamp workpiece and turn Maximum out-of-roundness 0.03 mm Step 1: Cutter selection Straight knurl right-hand tool: 1x 30 right-hand spiral toothed knurl cutter Straight knurl - left-hand tool: 1x 30 left-hand spiral toothed knurl cutter NOTE: Right-hand tool requires the workpiece to rotate in a clockwise direction. Left-hand tool requires the workpiece to rotate in an anti-clockwise direction. LA-Tool Tool Adjustment LA/FL Step 2: Install knurl cutters Clean the contact surface of bushing 5 and cutter holder 1.1. Coat bushing 5 and the face ends as well as the hole of knurl cutter 4 with a little Molykote G paste With knurl cutter 4 and washer 3 pushed on, insert bushing 5 into the cutter holder Screw in screw 2 and only tighten enough to allow knurl cutter 4 to rotate free of play Spiral knurl: Knurl cutters are to be mounted with 15, 30 or 90 spirals depending on the pitch of the spiral desired on the workpiece. It is advisable due to the large number of possible variations to consult your dealer or the manufacturer. 11

13 LA-Tool Tool Adjustment LA/FL Step 3: Clamp tool in tool holder Step 4: Adjust turning centre The tool must be centered when used on conventional lathes. Step 5: Adjust cutter The ideal position of the knurling cutters is when they lie parallel on the workpiece and still cut very slightly, i.e. the cutting edge of the cutters can be pressed in somewhat deeper (approx. 1-2 ). In the case of materials which are hard to machine, the knurling cutters may be inclined up to max NOTE: This adjustment does not apply when used on CNC machines as the tools are already centered. Sequence: Correction is achieved by turning the tool slightly in the tool holder 12

14 Step 6: Start of knurl The start of the knurl should be in a width no greater than 1,0 mm. With this width now move the tool to the full depth without interruption. The feed on infeeding should be approx mm. The knurling depth corresponds to the pitch of the knurling cutter being used, e.g. 1.0 mm pitch requires 1.0 mm infeed with reference to the diameter. The depth is measured from the knurling cutter's point of contact with the workpiece. After an idle time of 2-3 seconds, the workpiece is knurled by using the longitudinal feed. The surface deformation of the workpiece cannot be determined exactly as this is different from material to material. The knurling depth, however, should be sufficient to ensure that the knurl is only just sharp. LA-Tool Tool Adjustment LA/FL ATTENTION: Under no circumstances knurl with longitudinal feed into the face edge of the workpiece. Starting the knurl within the workpiece can be done only in certain circumstances. NOTE: Note that the protective bevel at the beginning of the workpiece may not be applied until knurling is complete. The coarser the pitch, the smaller the feed. Feed and cutting speed have no effect on the knurl pitch. max 1,0 mm 13

15 LA-Tool Tool Adjustment LA/FL Step 7: Knurling If the track generated does not run paraxially, this may be put right by correcting the two adjusting screws 10. When adjusting by way of screw 10a, first loosen screw 10b and vice versa Tighten the opposing screw again hand-tight when adjustment is complete 10a 10b Note: If the knurl is not accurate or is onesided, then the knurling process may be repeated after correcting the tool. 14

16 Mammut-Tool Technical Data 3. Mammut-Tool 3.1 Technical Data MI-MII/KF (Dimensions in brackets MII/KF) Types of knurl Cross and diamond Working range Ø mm ( mm) Shank dimension 45x40 mm (90x60 mm) Knurl cutters Ø 32 mm (42 mm) Cross 1 x 15 L and 1 x 15 R Diamond 2 x 90 Pitches see page 37 Weight 6 kg (18 kg) 110 (165) 79 (117) 280 (445) 160 (275) 45 (68) 40 (60) M/FL Types of knurl Straight and spiral Working range Ø mm Shank dimension 35x27 mm Knurl cutters Ø 42 mm Straight 1 x 30 R Spiral as required Pitches see page 37 Weight 1.6 kg

17 Mammut-Tool Overview: Main Components 3.2 Overview: Main Components Pos. Designation 1 Tool head 2 Screw 3 Washer 4 Knurl cutter 5 Bushing 6 Scale ring (diameter adjustment) 7 Index point 8 Clamping screws 9 Shank 10 Adjusting screw tool correction M/KF M/FL 11 Locking screw / Clamping screw (M/FL) Hexagonal nut A A A A

18 3.3 Tool Adjustment M/KF Preliminary work: Clamp workpiece and turn Maximum out-of-roundness: 0.05 mm Step 1: Cutter selection Cross knurl: 1x 15 left-hand spiral toothed knurl cutter on the cutter holder closest to scale ring 6 1x 15 right-hand spiral toothed knurl cutter on the opposing cutter holder Diamond knurl: 2x 90 toothed knurl cutters Mammut-Tool Tool Adjustment M/KF Step 2: Install knurl cutters Clean the contact surface of bushing 5 and cutter holder 1.1. Coat bushing 5 and the face ends as well as the hole of knurl cutter 4 with a little Molykote G paste With knurl cutter 4 and washer 3 pushed on, insert bushing 5 into the cutter holder Screw in screw 2 and only tighten enough to allow knurl cutter 4 to rotate free of play

19 Mammut-Tool Tool Adjustment M/KF Step 3: Set diameter Measure off workpiece diameter Unscrew clamping screw 8 Turn scale ring 6 until the required diameter aligns with index point 7 Clamp clamping screw Step 4: Clamp tool in tool holder Step 5: Pre-adjust turning centre Clamp tool in carriage so that holder shank is perpendicular to rotary axis Align centering device C at tip height on the swivel axis C

20 Step 6: Re-align turning centre Carefully bring into contact with the workpiece Both cutters must be in contact simultaneously. Unscrew locking screws 11 and carry out realignment using adjustment screw 10 Once the adjustment has been made, tighten locking screws 11 and screw down hand-tight Mammut-Tool Tool Adjustment M/KF the knurling cutters may be inclined up to max Sequence: Unscrew clamping screw 8 Adjust scale ring 6 slightly towards the next smaller diameter until the correct cutter setting is reached Tighten clamping screw 8 6 Step 7: Adjust cutter The ideal position of the knurling cutters is when they lie parallel on the workpiece and still cut very slightly, i.e. the cutting edge of the cutters can be pressed in somewhat deeper (approx. 1-2 ). In the case of materials which are hard to machine,

21 Mammut-Tool Tool Adjustment M/KF Step 8: Start of knurl The start of the knurl should be in a width no greater than 3.0 mm. With this width now move the tool to the full depth without interruption. The feed on infeeding should be approx mm. The knurling depth corresponds to the pitch of the knurling cutter being used, e.g. 1.0 mm pitch requires 1.0 mm infeed with reference to the diameter. The depth is measured from the knurling cutter's point of contact with the workpiece. After an idle time of 2-3 seconds, the workpiece is knurled by using the longitudinal feed. The surface deformation of the workpiece cannot be determined exactly as this is different from material to material. The knurling depth, however, should be sufficient to ensure that the knurl is only just sharp. max 3,0 mm ATTENTION: Under no circumstances knurl with longitudinal feed into the face edge of the workpiece. Starting the knurl within the workpiece can be done only in certain circumstances. NOTE: Note that the protective bevel at the beginning of the workpiece may not be applied until knurling is complete. The coarser the pitch, the smaller the feed. Feed and cutting speed have no effect on the knurl pitch. Step 9: Knurling NOTE: If the knurl is not accurate or is onesided, then the knurling process may be repeated after correcting the tool. 20

22 3.4 Tool Adjustment M/FL Preliminary work: Clamp workpiece and turn Maximum out-of-roundness 0.03 mm Step 1: Cutter selection Straight knurl right-hand tool: 1x 30 right-hand spiral toothed knurl cutter NOTE: Right-hand tool requires the workpiece to rotate in a clockwise direction. Mammut-Tool Tool Adjustment M/FL Step 2: Install knurl cutters Clean the contact surface of bushing 5 and cutter holder 1.1. Coat bushing 5 and the face ends as well as the hole of knurl cutter 4 with a little Molykote G paste With knurl cutter 4 and washer 3 pushed on, insert bushing 5 into the cutter holder Screw in screw 2 and only tighten enough to allow knurl cutter 4 to rotate free of play Spiral knurl: Knurl cutters are to be mounted with 15, 30 or 90 spirals depending on the pitch of the spiral desired on the workpiece. It is advisable due to the large number of possible variations to consult your dealer or the manufacturer. 21

23 Mammut-Tool Tool Adjustment M/FL Step 3: Clamp tool in tool holder Step 4: Adjust turning centre Clamp tool in carriage so that holder shank is perpendicular to rotary axis Align centering device C at tip height on the swivel axis Step 5: Adjust cutter The ideal position of the knurling cutters is when they lie parallel on the workpiece and still cut very slightly, i.e. the cutting edge of the cutters can be pressed in somewhat deeper (approx. 1-2 ). In the case of materials which are hard to machine, the knurling cutters may be inclined up to max C Sequence: Correction is achieved by turning the tool slightly in the tool holder 22

24 Step 6: Start of knurl The start of the knurl should be in a width no greater than 3.0 mm. With this width now move the tool to the full depth without interruption. The feed on infeeding should be approx mm. The knurling depth corresponds to the pitch of the knurling cutter being used, e.g. 1.0 mm pitch requires 1.0 mm infeed with reference to the diameter. The depth is measured from the knurling cutter's point of contact with the workpiece. After an idle time of 2-3 seconds, the workpiece is knurled by using the longitudinal feed. The surface deformation of the workpiece cannot be determined exactly as this is different from material to material. The knurling depth, however, should be sufficient to ensure that the knurl is only just sharp. Mammut-Tool Tool Adjustment M/FL ATTENTION: Under no circumstances knurl with longitudinal feed into the face edge of the workpiece. Starting the knurl within the workpiece can be done only in certain circumstances. NOTE: Note that the protective bevel at the beginning of the workpiece may not be applied until knurling is complete. The coarser the pitch, the smaller the feed. Feed and cutting speed have no effect on the knurl pitch. max 3,0 mm 23

25 Mammut-Tool Tool Adjustment M/FL Step 7: Knurling If the track generated does not run paraxially, this may be put right by correcting the two adjusting screws 10. Unscrew hexagonal nut 12 Unscrew clamping screw 11 and subsequently tighten lightly again to achieve a tolerance-free adjustment When adjusting by way of screw 10a, first loosen screw 10b and vice versa Tighten the opposing screw again hand-tight when adjustment is complete Tighten clamping screw 11 and hexagonal nut 12 NOTE: If the knurl is not accurate or is onesided, then the knurling process may be repeated after correcting the tool a 11 10b 24

26 STR-Tool Technical Data 4. STR-Tool 4.1 Technical Data STR/A-STR/B (Dimensions in brackets STR/B) Types of knurl Cross, diamond and straight Working range Ø 2.8 (core Ø)-25 mm (Ø 5-55 mm) Shank diameter see page 26 Knurl cutters Ø 14.5 mm (21.5 mm) Cross 2 x 15 R and 1 x 15 L Diamond 3 x 90 Straight 2 x 30 L and 1 x 30 R Pitches see page 37 Weight 0.5 kg (2.0 kg) Bore of knurling 20 mm (35 mm) head (A) Bore length (B) 25.5 mm (37 mm) Knurling head Ø (C) 54 mm (95 mm) Length of knurling 37 mm (52 mm) head (D) Length of cutter 15 mm (30 mm) holder (E) B A C E D 25

27 STR-Tool Technical Data Shanks STR/A Clamping Ø (F) Clamping length (G) Bore Ø (H) 15 mm 50 mm 9 mm 20 mm 50 mm 10 mm 25 mm 50 mm 15 mm ¾ 50 mm 9 mm ⅝ 50 mm 9 mm 1 50 mm 15 mm MK2 69 mm 8,5 mm Shanks STR/B Clamping Ø (F) Clamping length (G) Bore Ø (H) 20 mm 70 mm 10 mm 25 mm 70 mm 15 mm 30 mm 70 mm 18 mm 1 70 mm 15 mm 1 ¼ 70 mm 18 mm 1 ½ 70 mm 25 mm MK3 86 mm 10 mm H F G 26

28 STR-Tool Overview: Main Components 4.2 Overview: Main Components Pos. Designation 1 Tool head 2 Countersunk screw 3 Washer 4 Knurl cutter 5 Bushing 6 Cutter holder 0 7 Cutter holder 1 8 Clamping segment 9 Clamping screw 10 Set spindle 11 Set spindle for opposite spindle 12 Shank 13 Cheese-head screw to mount shank

29 STR-Tool Tool Adjustment STR 4.3 Tool Adjustment STR Preliminary work: Clamp workpiece and turn Maximum out-of-roundness 0.03 mm Turn a shoulder or, with smaller pitches up to 0.6 mm, a 30 bevel Step 1: Install shank Attach shank 12 to tool head 1 using three hexagonal socket head screws ø-0,5xt T = pitch 1,5xT 1,5xT 13 NOTE: This chamfering means that the knurl cutters only have to remove a small amount of material at the beginning and can therefore centre themselves better. The shoulder is particularly important for flat knurls. 28

30 Step 2: Cutter selection Straight knurl: 2x 30 L knurl cutter on cutter holder 0 1x 30 R knurl cutter on cutter holder 1 Cross knurl: 2x 15 R knurl cutter on cutter holder 0 1x 15 L knurl cutter on cutter holder 1 Diamond knurl: 2x 90 knurl cutter on cutter holder 0 1x 90 knurl cutter on cutter holder 1 STR-Tool Tool Adjustment STR Step 3: Install knurl cutters Clean the contact surface of bushing 5 and cutter holder 1.1. Coat bushing 5 and the face ends as well as the hole of knurl cutter 4 with a little Molykote G paste With knurl cutter 4 and washer 3 pushed on, insert bushing 5 into the cutter holder Screw in countersunk screw 2 and only tighten enough to allow knurl cutter 4 to rotate free of play Step 4: Clamp tool in tool holder 29

31 STR-Tool Tool Adjustment STR Step 5: Set diameter Version with infeed Unscrew six clamping screws 9 on the clamping jaws Open cutter holder 6 by means of positioning spindles 10 and cutter holder 7 via central positioning spindle 11 enough for the tool to be positioned above the workpiece Position the tool above the workpiece and lightly tighten clamping screws 9 Adjust positioning spindles 10/11 individually until the knurl cutters just touch the workpiece lightly Retract the knurl cutting tool for subsequent infeed The infeed depth is adjusted in the direction of the arrow using the indexing on positioning spindles 10/11 The number of index pitches to be adjusted is calculated as follows: Cutter pitch (T)/2 x 7, results in an adjustment by 3.5 index pitches for a cutter pitch of 1 mm for example Adjust the cutter holders individually by the value calculated and then screw down clamping screws 9 hand-tight

32 STR-Tool Tool Adjustment STR Version - Adjustment to core diameter Turn workpiece to knurl core diameter DK Unscrew six clamping screws 9 on the clamping jaws Open cutter holder 6 by means of positioning spindles 10 and cutter holder 7 via central positioning spindle 11 enough for the tool to be positioned above the workpiece Position tool above shoulder and lightly tighten clamping screws 9 D K Adjust positioning spindles 10/11 individually until the knurl cutters just touch the workpiece lightly on core diameter DK Retract knurl milling tool Screw down clamping screws 9 hand-tight Step 6: Start of knurl Feed in quickly to the shoulder and only very little into the full material using a feed rate of mm/rev After an idle time of 2-3 seconds, the workpiece is knurled by using the longitudinal feed After completing the knurl, retract the tool in rapid traverse 7 6 The coarser the pitch, the smaller the feed. Feed and cutting speed have no effect on the knurl pitch. 31

33 Wear Parts Tool Adjustment STR 5. Wear Parts The fixing elements for the knurl cutters of the QUICK knurl cutting tools are wear parts and must be replaced frequently. 1a 1b 1c 6. Knurling of Stepped Workpieces It must be noted that with all QUICK knurl cutting tools it is not possible to knurl right up to a shoulder due to the inclined position of the knurl cutters. Please refer to the table for dimensions. a 2a 2a 2b b Pos. Designation Typ 1a Slot screw LA 1b Cheese-head screw M/KF, M/FL 1c Countersunk screw STR 2a Washer LA, M/KF, M/FL 2b Washer STR 3 Bushing 32

34 Knurling of Stepped Workpieces Distance b corresponds to the Ø of the knurl cutters Ø 8.9 Ø 14.5 Ø 21.5 Ø 32 Ø 42 a b b b b b

35 Knurl Cutters with Bevel 7. Knurl Cutters with Bevel A knurl cutter's teeth may break off when knurling "hard" materials. It is possible to increase the knurl cutter's service life by cutting a 45 bevel. This is only applicable for the KF and STR models. The drawing beside shows which knurl cutter may have bevel. Ø 32 mm and Ø 42 mm cutters are already produced with bevel. Arrangement for KF- tools 0,5 x t 45 t Arrangement for STR- tools 34

36 Troubleshooting 8. Troubleshooting KF-Tools Knurl trailing spirally Look at start of knurl Look at knurling depth Tool tilted sideways -> check position Clearance of tool too positive or too negative Overlapping of the knurl (double knurl) Incorrect adjustment of diameter Approach to knurl depth too slow as a result of which too little guidance of knurl cutters in track Look at start of knurl Teeth of knurl cutters knocked off Bevel knurl cutters with hard materials Knurl cutter has been overloaded too much feed, cutting depth too great Incorrect adjustment of diameter Fixing screws of knurl cutters loose Look at adjustment of cutters Unevenly deep knurl track Re-align position of head using spindle Seizing of knurl cutters on bushing (see FL) FL-Tools Knurl trailing spirally Correct position of head using precision adjustment screws Look at start of knurl Look at knurling depth Tool tilted sideways -> check position Clearance of tool too positive or too negative Overlapping of the knurl (double knurl) Approach to knurl depth too slow as a result of which too little guidance of knurl cutters in track Look at start of knurl Teeth of knurl cutters knocked off Knurl cutter has been overloaded feed too great, cutting depth too great Fixing screws of knurl cutters loose Look at direction of rotation Look at adjustment of cutters Seizing of knurl cutters on bushing Reduce cutting speed Use Molykote paste Coolant jet directly onto the knurl cutter 35

37 Troubleshooting STR-Tools Knurl does not come up to the requirements Are the knurl cutters on the right holder? Tool head and workpiece axis are not aligned All three knurl cutters do not have the same cutting depth Seizing of knurl cutters on bushing Reduce cutting speed Use Molykote paste Coolant jet directly onto the knurl cutter Knurl trailing spirally Look at start of knurl (turn a centering stepp) Look at knurling depth Tool tilted sideways -> check position Overlapping of the knurl (double knurl) Approach to knurl depth too slow as a result of which too little guidance of knurl cutters in track Look at start of knurl Incorrect adjustment of diameter Teeth of knurl cutters knocked off Bevel knurl cutters with hard materials Knurl cutter has been overloaded too much feed, cutting depth too great Fixing screws of knurl cutters loose Incorrect adjustment of diameter 36

38 Dimensions and Pitches Available 9. Dimensions and Pitches Available Technical Description Material: Powder metallurgy tool steel Heat treatment: Hardened to HRC Models: Ground or ground + coated with Q-Dur Dimensions and pitches Ø Tooth pitch angle Pitches (t) toothed 0.3/0.4/0.5/0.6/0.8/ L/15 R toothed 0.3/0.4/0.5/0.6/0.8/ L/30 R toothed 0.3/0.4/0.5/0.6/0.8/ t Ø Tooth pitch angle Pitches (t) toothed 0.4/0.5/0.6/0.8/1.0/ 1.2/1.5/1.6/ L/15 R toothed 0.4/0.5/0.6/0.8/1.0/ 1.2/1.5/1.6/ L/30 R toothed 0.4/0.5/0.6/0.8/1.0/ 1.2/1.5/1.6/ toothed 1.0/1.5/2.0/2.5/ L/15 R toothed 1.0/1.5/2.0/2.5/ toothed 1.0/1.5/2.0/2.5/3.0/ L/15 R toothed 1.0/1.5/2.0/2.5/3.0/ R toothed 1.0/1.5/2.0/2.5/3.0/ toothed 0.4/0.5/0.6/0.8/1.0/ L/15 R toothed 0.4/0.5/0.6/0.8/1.0/ L/30 R toothed 0.4/0.5/0.6/0.8/1.0/1.2 37

39 Dimensions and Pitches Available Order numbers and designation Ident. no. Ø A Ø B C Pos. Description 1 Production date MM/YY 2 Tooth pitch angle 3 Tooth pitch direction R (right) L (left) 4 Tooth pitch 5 Material 6 Tooth tip angle 7 Production process G (ground) / M (milled) 8 Coated with QDUR / TiCN / TIN 38

40 Reference Values for Feeds and Cutting Speeds 10. Reference Values for Feeds and Cutting Speeds Material Cutter Ø V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø s mm/rev Workpiece Ø over 250 V m/min s mm/rev Steel up to 600 N/mm² Steel up to 900 N/mm² Stainless steels

41 Reference Values for Feeds and Cutting Speeds Material Cutter Ø V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø over 250 s mm/rev Ms58 Ms

42 Reference Values for Feeds and Cutting Speeds Material Cutter Ø V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø over 250 s mm/rev Bronze Aluminium Grey cast iron

43 Reference Values for Feeds and Cutting Speeds Material Cutter Ø V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø s mm/rev V m/min Workpiece Ø over 250 s mm/rev Cast steel NOTE: Generally speaking the values applicable to aluminium are also valid for plastics. Test runs are imperative. 42

44 QUICK Tooling GmbH Brunnenstraße Aldingen Germany Tel.: Fax: / Edition. Technical details are subject to change. Printing errors excepted. No part of these document may be copied or disclosed for any purposes without the written approval of QUICK Tooling GmbH. All rights reserved.