Machining center: on the minimum operating area for high productivity

In order to get the highest productivity, capital is limited and higher operating area is needed in economic production. Operating area is an important criterion when choosing appropriate processing center. It is best to use multi-axis machine tools, the structure compact machine as much as possible. Both these two features is ideal. And isui than the machine tool co., LTD. (SW) (address: Waldmossingen) experts, to BAS03 (figure 1) the structure of the vertical machining center series successfully done this in the past, these machine tools by two main shaft and two pairs of slewing bearing, bridge type clamp in the mass production with the minimum of resettlement area to achieve the highest productivity.

SW BA S03 vertical machining center using the advantages of frame structure on the whole component

Compact structure, high rigidity and high precision from the overall improve the structure and configuration characteristics of the component make all BA S03 structure series machining center has more advantages. As a result of the three aspects are closed integral component, for place types (processing and workpieces, blanking position) of the machine tool only 3.6 m by 2.6 m resettlement area, for the two position type (with machining and workpieces, blanking position) of the machine tool is only 3.9 m by 3.0 m resettlement area. In addition, this style of frame structure with high rigidity and can form a closed when transfer processing power lines of force. Frame structure, the drive and linear motion axis can be set in the upper part of the processing zone and outside. It would not have splashed down chip and cooling lubricants. The Z axis is moving within the framework of a closed, on both sides of the frame to the rotation of the guide rail as the X axis, and turn the guide in the Y closed framework, thus form a closed framework "box" in the box. Y driven by two separate device for feed movement of feed screw, with a combination of direct measurement system, even if the result of the cutting force eccentric load, also can avoid sliding table tilt (figure 2). So, make the machining center BA S03 positioning accuracy is achieved in the whole processing Tp is 0.008 mm (according to VDI DGQ3441). Special's favor, and maintain long-term accuracy, with the portable machine tools and the post on the stud configuration sliding table of this type of typical structure of vertical machining center is different. Straight axis moves quickly, to 8 m/s2 acceleration to accelerate, rapid traverse speed can reach 75 m/min.

Adjustable drive, even under the action of eccentric force, in the whole processing area still can achieve consistent and stable precision

Direct drive spindle turn top speed 17500 r/min. Since 2500 r/min speed, the driving power of 15.5 kW spindle motor on time (by 40%). Due to using the handle HSK63 and 60 Nm torque, also can be applied to larger cutting tools, such as plane milling and face milling cutter with indexable inserts. In this year, launched a new variant, machine tool has two times larger than so far the main shaft torque. During tool change, the weight of the tool can be up to 7.5 kg and cutter diameter of 70 mm, when loading knife knife knife library bridge the two knife on both sides of no cutting tool, the cutting tool can adopt large 160 mm in diameter. Machining center of dao database is for 40 64 knife (option), for double spindle machining center, dao database is for 2 x 20 seats (option 2 x 32 knife). Extract type tool change principle, spindle moves to change the cutter location, reduced the time needed for the tool change, thus, chip to chip (evenly between the two cutting interrupt time) only for 3 seconds.

Types of vertical machining center for the unit, with 600 X 400 X 400 mm (X, Y, Z axis) measure of a bridge type fixture configuration in the epz. Can turn 360 ° (A shaft, the highest rotary speed of 50 r/min) and carries no more than 400 kg heavy fixture and artifacts (figure 3). The combination of direct drive and direct measurement system can achieve the positioning accuracy of + / - 5 (Angle) seconds.

Bridge type clamp the largest can carry 400 kg weight and artifacts, and thus can realize the clamping multiple artifacts

Comprehensive processing under the condition of auxiliary time at least two position type machining center, can be used by the slewing bearing on both sides of the bearing of the bridge type rotary fixture (A shaft). In just 3.5 seconds, bridge type fixture 180 ° rotation, from the upper and lower position return to processing position. In this way, the manipulation of the staff can be in parallel with the basic time time, according to ergonomics is the most suitable loading height of artifacts, blanking, this on the horizontal machining center of SW company has proved to be the best design criteria. Through organic glass partition separates the upper and lower position completely with processing, in this way, chip and the cooling lubricant was completely cut off in the processing zones. To eliminate the manipulation of the staff in the upper and lower material damage that may occur. Because the whole component is open, forward and up so good accessibility. So, can have no title on the adoption of the industrial robot to realize automatic artifacts, blanking, or through gantry feeding device on the auxiliary implementation artifacts, blanking. Parallel to the basic time period on the artifacts, blanking and two main shaft processing and provides

The highest productivity and the best efficiency

On the bridge type clamp through the rotary table attached, can be processed in any point of view, and can be realized under a clamping workpiece five surface of the workpiece machining shaft (B). In order to realize the hydraulic drive needed for this processing and the workholder device and pneumatic driving devices or clamping device interface, have on the slewing bearing and bridge fixture. Here the so-called 5-axis workbench with like the fourth axis motor of the same bridge type clamp. Rotary table configuration one, or two bridge type clamp should pass economy to decide.

Down in the open processing zone, smooth clapboard is beneficial to the activities of the chip, BA S03 and very suitable for dry machining. Also set up on machine tool spindle internal coolant supply device, spindle by the special rotary joint trace oil-gas lubrication fluid (wetting agent) to the tool on the cutting edge, this can be like a conventional cooling lubrication device to produce up to 120 bar of pressure. Made up of the structure of vertical machining center series machine tool system, we can find a place in the smallest area to obtain the necessary high productivity. Here, manufacturing enterprise can from different varieties of machine tool of flexible select the most appropriate variant varieties. For small batch production and frequent replacement of artifacts, should give preference to the single type of spindle unit and adopts manual on bridge type clamp fixture of vertical machining center.

In batch and mass production in order to achieve high productivity, should choose double spindle double location type and on the bridge type fixture is equipped with additional NC rotary table of vertical machining center. Can be realized under a clamping, the workpiece on the five and the integrated processing in any Angle. The production time is reduced, and made a contribution to achieve high accuracy. Small and medium size workpieces, can use compact structure, high productivity of BA S03 structure series machining center. Double spindle machining center