Kolb HTB deep hole drilling machine , MPN floor type drilling machine

Deep-Hole Drilling Machine HTB F100-Type , MPN Drilling Machine MPN For maximum productivity Drilling Machines for Use in Appa The Requirement: Increases in productivity and efficiency Single and multi-spindle machining Free choice of spindles Increases in cutting rate through the use of modern tools Application of the GUN and BTA deep-hole drilling methods Improvements in drilling quality, surface finish, and bore deviation Elimination of reworking operations such as counterboring and reaming Complete machining of the workpieces in a single setting The solution: HTB horizontal deep-hole drilling machines with 1 3 spindles or MPN floor-type drilling machines with 8-12 spindles Maximum rigidity of the machine frame High drive unit output Individual drive units for each spindle Variable spindle spacing Monitoring units for tool and workpiece Comprehensive coolant supply and treatment system Efficient chip disposal system CNC control Apparatus Engineering and Power Engineering Machining of a tube plate on a single-spindle deep-hole drilling machine 12-spindle floor-type drilling machine during machining of a tube plate using drills with coolant channels 3 Deep-Hole Drilling Methods Where the cutting of thick-walled tube plates is concerned, conventional drilling tools such as twist drills, spiral-flute counterbores, and reamers are now a thing of the past. Today, gun drills or BTA drilling tools with carbide cutting edges are used for deep-hole drilling operations. GUN Drilling Method ELB In the gun drilling process, the coolant is conducted under pressure to the tip of the drill through a bore in the shaft. The chips are then transported, together with the cooling oil, through the groove along the outside of the shaft. The advantage of this method is that several tube plates can be drilled together as a stacked, since the internal cooling oil supply causes no loss of pressure. Carbide-tipped gun drill with internal cooling oil feed and external chip and cooling oil return BTA Drilling Method In contrast to the gun drilling method, BTA drilling tools operate with external cooling oil supply and internal chip and cooling oil return. The cooling oil is conducted under pressure between the drilling tube and the wall of the hole to the tip of the drill and returns carrying the chips through the inside of the drilling tube. Contact between the surface being drilled and the returning chips is thereby prevented, enabling a high surface finish quality to be produced. Thanks to its single-cut BTA drilling head with disposable carbide tips, external cooling oil supply, extreme rigidity, the drilling tube, and internal chip and cooling oil return, permits very high drilling capacities to be achieved. 4 Cooling Oil Supply and Return During Deep Hole Drilling For the BTA method, drilling oil feed or supply units E30ZA are required to supply the cooling oil. During gun drillings, the BOZA also effects the disposal of the cutting chips. For both methods, the BOZA has a common body KOM6I--BOIA . This machine body incorporates the diameter-dependent drilling tube guide and the drilling bush. The KOMB1-BOZA is mounted on the guide slide of the deep-hole drilling unit. A hydraulic cylinder in the drilling bush holder seals the KOMBI BOZA against the workpiece. The drive of the tool in the drilling spindle is effected by Ø chucking shaft and driving pin during gun drilling and by a collet chuck BTA drilling: BTA Drilling Method

Cooling oil in Cooling oil and cutting chips out KOMBI BOZA

Drilling bush holder Machine body Drilling tube guide Steady bearing bracket Tool carrier Deep-hole drilling unit

Cooling oil and cutting chips out KOMBI BOZA Cooling oil in GUN Drilling Method ELB Drilling oil supply unit KOMBI-BOZA for gun ELB and BTA drilling methods with common body

Technical Characteristics of the HTB Horizontal Deep-Hole Drilling Machine

Machine Construction The machine is constructed on the basis of a boring mill. The carrier X-axis supports the column and moves transversely to the workpiece by means of a hydrostatic-type guide. The narrow guide of the slide is located in the middle of the carrier with hardened guide gibs and roller elements. The feed drive is supplied by a DC servo motor and a double pinion drive. The drilling slide Y-axis performs the vertical movements, powered by a DC servo motor and ball screw drive, and also supports the guides of the drilling units Z-axis. The Y and Z-axes have flat guides coated with slideway lining in conjunction with hardened guide gibs and roller elements.

Deep-Hole Drilling Unit Depending on the drilling capacity required, the machine can be supplied with one, two, or three-spindle vertical arranged drilling units. Each spindle has an independent DC main drive and a separate DC feed drive via a ball screw, and can therefore be operated individually or in groups. For machining bigger holes, the lower unit on three-spindle deep-hole drilling machines is designed as the main spindle and has a higher drive output. In order to increase the productivity of the machine, the spindle spacing is adjustable via motors. Adjustment of the spindle spacing is effected according to spacing blocks. The X, Y, and Z axes of the machine are each under CNC control. A platform connected to the drilling slide serves as the operating or control point from which all setting-up, operating, and controlling operations are in addition to deep-hole drilling, conventional drilling, thread cutting, chamfering, groove milling, and milling operations can be performed on the machine.

Special Designs Deep-drilling machines with horizontal spindle configurations are used for machining tube-shaped collectors. In such cases, the holes are located around the perimeter of the collectors, which is the reason why they have to be held in a controlled indexing device with outboard tailstock. These machines can, of course, also be used for machining tube plates.

Cooling oil supply System Pump tanks with a corresponding capacity form the basis for a satisfactory supply of cooling oil and reliable cooling. The cooling oil and the chips pass through telescopic tubes into the collector troughs in the base of the machine. The drilling chips are extracted from the oil circuit using paper band filters. A cooling oil recycling centrifuge is integrated into the automatic chip disposal system.

Safety Monitoring Systems In order to detect malfunctions, e.g., a worn tool or a chip blockage, in time to avoid damage, the machines are equipped with extensive safety monitoring systems. The torque, power consumption of the feed motor, and drilling oil pressure of each spindle are monitored. If the preset values are exceeded, an acoustic alarm sounds. The spindle affected returns to its initial position while the other spindles complete their drilling cycle. Another major safety system is the position monitoring system which operates independently of the CNC control of the X and Y axes. The drilling command is given only when the values input via the CNC system correspond to the values stored in the position monitoring system. As a result, any positioning faults due to programming errors can be avoided.

Technical Characteristics of the MPN Multi-spindle Floor Type Drilling Machine

Thin-walled tube plates and stacked plates with large numbers of drilling holes are processed on vertical floor-type drilling machines with 8 or 12 spindles. Twist drills with external coolant feed, carbide-tipped twist or two-lip drills as cooling channel drills with internal coolant feed as well as counterboring, chamfering, reaming, and groove milling tools can be used. Machine Construction The machine is of bridge-type design with a cross-rail and two lateral pillars. The machine traverses on guide beds over the workpiece which is clamped to a large fixed table. The bridge is guided on the beds X-axis and the drilling head on the cross-rail Y-axis via roller elements with hardened guide gibs. The X-axis is driven synchronously by two DC motors via double pinion drives and racks, whilst the drive for the Y-axis comes from a DC motor and ball screws. The machine has CNC control for the X, Y, and Z-axes.

MPN 12 floor-type drilling machine processing stacked gusset plates

Drilling Head model drilling head spindle units block spindles DC main drive motor drive shafts. feed spindle unit DC motor ball screws units head. drilling depth Z-axis positioning axis. spindle spacing adjustable. spacing blocks adjusted indexing drilling pattern. spindles clamped push button, spindle carrier tools quick-change chuck. Safety Monitoring System detect malfunctions, worn tool chip blockage hole, avoid damage, machines equipped system monitors power consumption feed motor spindle affected indicated, spindles return initial position machine stops. Controlled Spindle Spacing Adjustment special versions, adjustment spindle spacing effected axis V-axis CNC control system. clamping release spindle units automatic. Chip Removal machines fitted brush system flushing device remove chips workpiece. flushing device sluices drilling chips brush system. brushes, positioned angle, sweep chips workpiece allow subsequent operations, chamfering groove milling, performed interruption. Examples Applications MPN Multi-spindle Flow-type Drilling Machine drilling work, tube plates stacked plates drilled individually or ends welded together packet, depending thickness. drilling depths times diameter, holes drilled cooling channel drills internal coolant feed. coolant outlet directly cutting area, optimum cooling lubrication achieved, permitting high cutting rates tool service life. operating conditions improved use drills 3-facet grinding. accurate concentric running tip drill, grinding self-centering effect. balanced cutting forces produce accurate holes low deviation, high degree concentricity fine bore tolerances. Cooling channel drill ground 3-facets addition method mentioned above, carbide-tipped cooling channel twist drills used drilling depths times diameter hole diameters up mm, carbide-tipped double-lip drills used drilling depths mm hole diameters mm, internal coolant feed. major advantage drills normal coolant feed cutting speed times higher HSS twist drills, permitting reduction around drilling time. Carbide cooling channel drill special tool widely used forward reverse deburring chamfering drill holes reacts cutting pressure: cutting pressure exceeds preset blade pressure, blades withdrawn simultaneously tool shaft. control system ensures counterboring tool passes hole reduced pressure, preventing damage hole surface. passing completely hole, blades return initial position. reverse feed, rear edge hole machined. change spindle rotation made machining operation. Countersinking tool forward reverse chamfering tubes welded rolled tube bottoms. rolling, ring grooves required tube produced groove cutting device positively guided cutting return stroke contact workpiece. waviness workpieces compensated spring-loaded length compensation system. grooves produced simultaneously single cycle. tool inserted finished drill bore workpiece. Plunge cutting groove cutting device Specifications HTB Deep-Hole Drilling Machine HTB I HTB II HTB III HTB IIIWE spindles spindles distance driving power solid drilling St 60 speeds feeds tool taper working range column displacement X-axis spindle head displacement Y-axis drilling spindle stroke Z-axis mains supply control voltage MPN Floor-Type Drilling Machine MPNB spindles spindle spacing driving power solid drilling St 60 speeds feeds tool taper working range bridge displacement X-axis drilling head displacement Y-axis drilling spindle stroke Z-axis mains supply control voltage HERMANN KOLB MASCHINENFABRIK AG