Общий каталог Sumitomo 2019 - 2020 - страница 982

DrillingSolidIndexableIndexableHead TypeInsert TypeReamersBrazedOthers Power Rating (kW) Coolant Volume (L/min) SumiDrill WDX Type ■ Lathe Machining Guidelines ■ Drill Mounting Internal bore smaller Internal bore larger · Set the drill so that the peripheral insert is parallel to the X axis of the machine. (Fig.1) · Press the end of the flange of the drill tightly against the face of the holder when tightening the bolt. ■ Adjusting work diameter (offset) Machine Central Insert · The work diameter is adjustable by moving the machine X axis. X axis Peripheral Blade · Make the adjustment by moving in the positive direction of the X axis (enlarging the bore diameter). Moving the X axis in the negative direction (to reduce the bore diameter) is not recommended as the holder may interfere with the hole. (See Fig. 1) · The maximum allowable adjustment (offset) differs depending on the drill diameter. Refer to Radial Offset (Max) in the Holder dimension tables on pages J114 to J120. Fig. 1 J ■ Other notes· ‌W hen the drill is mounted on a lathe, the centre of the central insert is designed to be 0.15 to 0.2 mm below the centre of the spindle. · ‌If the spindle deviates so far off centre that the centre of the central insert lies above the spindle centre, the central insert will break. · ‌S et the depth of cut for turning or internal boring work to 1/5 or less of the drill diameter (max. 5 mm or less). (Example: Set depth of cut to 4 mm or less for a drill diameter of ø20 mm) Fig. 2 · ‌I nstall a cover to prevent injury from possible chip fly-out (see disc-shaped chip in Figure 2) when through boring on a lathe. If your equipment has no cover, attach a cover or similar part for your safety. ■ Typical Power Ratings ■ Typical Coolant Volume 12 40 10 f 0.24 35 For drill diameters ø18.5 to 55 mm,f 0.18f 0.1230For drill diameters ø13 to 18 mm,coolant pressure of at least 2.0 MPa is recommended.coolant pressure of at least 1.0 MPa is recommended. 8 25 6 f 0.06 20 Recommended Coolant Volume 4 15 10 2 5 Minimum Discharge 0 10 15 20 25 30 35 40 45 50 55 0 10 15 20 25 30 35 40 45 50 55 Drill Diameter (DC) Drill Diameter (DC) ● Power ratings are subject to change based on conditions such as work ● Coolant volume is a factor that affects drilling performance, material and cutting speed, and should only be used for reference. particularly with respect to chip evacuation and lubricity. ● Cutting Conditions (Reference) This is particularly important for chip evacuation and lubricity. Work Material: S50C (230HB) ● Coolant pressure should be set higher for small drills. (ø18.0 mm or smaller) Cutting Speed: vc=150m/min ● Coolant volume is usually adjusted by changing the coolant pressure provided on most CNC machines. ● This table provides guideline values only. More coolant may be required depending on the machine, coolant and work material. ■ Precautions for Attaching and Removing Inserts ·‌Before mounting the insert, remove all traces of foreign matter on the insert seat Using a Wrench Insert Attachment using air or other means. · When using the wrench, align it to the axis of the screw and press while turning. (See Fig. 3) Peripheral Insert Central Insert If the wrench is not aligned with the screw, the insert will be insufficiently clamped and the tip of the wrench and/or the Torx hole of the screw may become deformed. · ‌Do not allow clearance between the insert seat and drill when mounting the insert (Fig. 4, Part A). Figure 4 shows a properly mounted insert. Clearance is normal * ‌It is normal for the outer sides of the central insert to have clearancebecause it is clamped at its centre and pushed to the rear. Fig. 3 Fig. 4 A A and does not affect use. ■ Troubleshooting Problem Symptom Cause Countermeasures Drilled hole diameter is larger than desired · Deflection of the holder · Decrease the feed rate to decrease the thrust force. due to high thrust force · Make an adjustment on the X axis. Too much variation in Drilled hole diameter is smaller than desired · The cutting edge backs off · Increase the feed rate. hole diameter and does not enter the workpiece · Make an adjustment on the X axis. Pronounced difference in hole · Packing of chips · Increase the feed rate to improve chip evacuation. diameter at entrance and bottom · Use an L type breaker for chip control. Poor machined surface from · High cutting force · Decrease the feed rate. Poor quality machined entrance to bottom of hole · Low rigidity of workpiece · Review tooling to improve rigidity. hole surface Poor machined surface at bottom of hole · Machined surfaces · Increase the feed rate to improve chip evacuation. damaged by chips · Use an L type breaker for chip control. Breakage on central insert (centre) · Improper adjustment of centre height· Insert is not strong enough· Check the centre height again.· If the drill is being used on a lathe, try flipping the drill 180°.· Use a strong edge chipbreaker (H type). Insert is broken Breakage on peripheral insert · High cutting load in cutting edge · Decrease the feed rate to decrease cutting load. · Use a strong edge chipbreaker (H type). J122