CN104972305A - Numerically-controlled auxiliary machine tool for machining ring groove of large motor rotor - Google Patents

Abstract

Provided is a numerically-controlled auxiliary machine tool for machining a ring groove of a large motor rotor. The numerically-controlled auxiliary machine tool mainly solves the problems that according to an existing large numerically-controlled floor-type milling and boring machine, the large motor rotor needs to be repeatedly clamped and adjusted, and indexing errors are large. The numerically-controlled auxiliary machine tool is characterized in that a main headstock (2) with anti-backlash indexing is fixed to one end of a machine tool body (1), and a spindle detection device is connected to the rear end of a spindle of the main headstock (2); an auxiliary headstock (3) is connected to the other end of the machine tool body (1) in a sliding mode; a servo chuck is connected to the auxiliary headstock (3); a tip detection device is connected to the tail of a tip of the auxiliary headstock (3); two center supports (4) are connected to the machine tool body (1); a clamping device (5) is longitudinally connected to the machine tool body (1) in a sliding mode. The numerically-controlled auxiliary machine tool for machining the ring groove of the large motor rotor has the characteristics that machining of the large motor rotor is completed by conducting clamping and adjustment once, and indexing errors are small.

Description

The auxiliary lathe of numerical control Large Rotor cannelure processing

Technical field

The present invention relates to a kind of lathe, the auxiliary lathe of especially numerical control Large Rotor cannelure processing.

Background technology

In Large Rotor cannelure process, generally adopt the processing of numerical control landing milling process bed, and existing type numerical control landing milling process bed to be installed adjustment Large Rotor repeatedly because reasons in structure exists, and the problem of the adjustment difficulty that is installed, thus cause working (machining) efficiency low, crudy is difficult to ensure, labor strength is large, is unfavorable for applying.

Summary of the invention

Repeatedly to be installed adjustment Large Rotor to solve existing large-sized numerical control floor type boring and milling machine, be installed adjustment difficulty, the problem that the error of division is large.The invention provides the auxiliary lathe of a kind of numerical control Large Rotor cannelure processing.The adjustment that is once installed of this numerical control Large Rotor cannelure processing auxiliary machine bed accessory completes Large Rotor processing, is installed easy to adjust, the feature that the error of division is little.

Technical scheme of the present invention is: the auxiliary lathe of this numerical control Large Rotor cannelure processing comprises lathe bed, main headstock, secondary headstock, center bearing bracket, clamping device.Main headstock with the gap calibration that disappears is fixed on lathe bed one end, the rear-end of spindle of main headstock is connected with main shaft checkout gear, secondary headstock is slidably connected at the lathe bed other end, secondary headstock is connected with servo-actuated chuck, the top afterbody of secondary headstock is connected with top checkout gear, 2 center bearing brackets are connected on lathe bed, and clamping device longitudinal sliding motion is connected on lathe bed.

The present invention has following beneficial effect: the auxiliary lathe of this numerical control Large Rotor cannelure processing is fixed on lathe bed one end owing to adopting the main headstock with the gap calibration that disappears, calibration rotation detecting device and mutual comparison feed back control system, secondary headstock with calibration rotation detecting device and mutual comparison feed back control system is slidably connected at the lathe bed other end, secondary headstock is connected with servo-actuated chuck, 2 center bearing brackets are connected on lathe bed, and clamping device longitudinal sliding motion is connected to optimizing structure on lathe bed.Utilize main headstock calibration, the gap that disappears and drive workpiece, utilizing two center bearing brackets and clamping device righting clamping workpiece, utilize secondary headstock rest workpiece and detect calibration, thus the adjustment that is installed once is completed, be installed easy to adjust, improve indexing accuracy, reduce labor strength.The adjustment that is once installed of this numerical control Large Rotor cannelure processing auxiliary machine bed accessory completes Large Rotor processing thus, is installed easy to adjust, the feature that the error of division is little.

Accompanying drawing explanation

Accompanying drawing 1 is structural representation of the present invention;

Accompanying drawing 2 is Fig. 1 left views.

1-lathe bed in figure, the main headstock of 2-, the secondary headstock of 3-, 4-center bearing bracket, 5-hydraulic clamp, 6-calibration rotation detecting device.

Detailed description of the invention

Below in conjunction with accompanying drawing, the invention will be further described:

Shown in accompanying drawing, the auxiliary lathe of this numerical control Large Rotor cannelure processing comprises lathe bed 1, main headstock 2, secondary headstock 3, center bearing bracket 4, clamping device 5.Main headstock 2 with the gap calibration that disappears is fixed on lathe bed 1 one end, and the rear-end of spindle of main headstock 2 is connected with main shaft checkout gear, and main headstock 2 has calibration, index feed and the gap function that disappears.Main headstock 2 adopts Double-gear gear wheel disc spring to disappear the main transmission structure of gap, for the rotary actuation feeding of indexing means, the rotary actuation feed arrangement of calibration, have employed Double-gear, gear wheel disc spring disappears gap and Double-gear, individual gears disappear gap combining structure, designed by above innovation structure, ensure that forward and reverse gapless driving of whole driving-chain, therefore its transmission accuracy is able to effective guarantee of frame for movement.At the direct-connected angular encoder of the main shaft of main headstock 2 as calibration rotation detecting device, namely Heidenhain ROD880 angular encoder, at the direct-connected encoder of the top afterbody of secondary headstock 3, detect spindle chuck revolution, detect workpiece rotation situation, and compare with calibration encoder, detect between workpiece and chuck whether have difference in rotation, improve annular groove machining accuracy and the security of rotor.During index feed, indexing means driven by motor main shaft rotates, and controls calibration anglec of rotation size by the CNC system of cnc boring and milling machine, by encoder feedback, ensures feed accuracy.When drive end, Partner encoder detect inconsistent, main frame and the machine stop everything, guarantee that rotor calibration accurately and the precision of machine tooling and reliability.In order to reach the high accuracy of feeding, needing closed loop feedback to control the accurate station of feeding, therefore main shaft direct connection angular encoder, detecting positional precision; Simultaneously in order to prevent the slip between chuck and workpiece, adding an angular encoder at tailstock place, detecting the location of workpiece.Time the position only having two encoders to detect is the same, system just can feeding, which ensure that the high accuracy of feeding and the reliability of processing.

Secondary headstock 3 is slidably connected at lathe bed 1 other end, secondary headstock 3 is automatically connected in lathe bed 1 other end by track sliding, and by adjusting about handle, secondary headstock 3 is connected with servo-actuated chuck, the top afterbody of secondary headstock 3 is direct-connected has top checkout gear, namely Heidenhain ROD880 angular encoder, detects tailstock chuck revolution, carry out calibration detection at the drive end of rotor and Partner simultaneously, guarantee that rotor calibration accurately and process safety.In order to arrive the high accuracy of feeding, needing closed loop feedback to control the accurate of feeding, therefore main shaft direct connection angular encoder, detecting positional precision; Simultaneously in order to prevent the slip between chuck and workpiece, adding an angular encoder at tailstock place, detecting the location of workpiece.Time the position only having two encoders to detect is the same, system just can feeding, which ensure that the high accuracy of feeding and the security of processing.

2 center bearing brackets 4 are connected on lathe bed 1, and center bearing bracket 4 is V-shape, V-shape inner top side is connected with roller, bottom center bearing bracket 4, install adjustable blocking iron, raise by adjustment parallels the support that roller realizes different-diameter workpiece.Center bearing bracket 4 is for adjusting the coaxial rolling supporting structure of workpiece centre and the alignment of shafts, and rotor auxiliary stand have employed 2 roll center frame supporting mechanisms, is conducive to the processing of rotor annular groove.General rotor processing is all the processing of straight trough, and annular groove need workpiece can on center bearing bracket 2 calibration rotary rolling, therefore the form of rolling support is adopted, low compared with static-pressure central frame cost, and there will not be the oil clearance that static-pressure central frame power-off produces, structure is simple, and machining accuracy is high, energy-saving and cost-reducing.

Clamping device 5 longitudinal sliding motion is connected on lathe bed 1, clamping device 5 side has side to push up oil cylinder, there is top compressing cylinder above, the piston of top oil cylinder and top compressing cylinder is connected with clamping body, clamping body and rotor interface are arc surface, clamping device 5 has lower clamping body below, lower clamping body by two independently clamping body form a V face, cylinder body is fixed on an interim clamping body, another clamping body and cylinder rod are linked together, just V face can be increased or reduce by the flexible of oil cylinder like this, achieve the action of clamping, twice clamping body can move on guide rail, after workpiece is fixing, in the process of clamping, at slide on rails, achieve clamping like this.During processing straight trough, in order to prevent adding vibrations in man-hour, adopting the device of clamping rotor, preventing vibration of workpiece, ensureing straight trough high accuracy.Clamping process is: lower clamping body oil cylinder tension, drives clamping body action, floating clamping mechanism rotor; Afterwards, push up compressing cylinder and drive clamping body clamping rotor; Afterwards, top, side hydraulic oil cylinder driving clamping body holds out against rotor from the side.Under this mechanism, clamping belongs to floating clamping mechanism, is convenient to determine workpiece centre; Top, side Main Function overcomes the impact of cutting force on rotor.

The auxiliary lathe of this numerical control Large Rotor cannelure processing and TK6916/L80 type numerical control landing milling process bed support the use, utilize the CNC system of digital-control boring-milling machine, install Data Control insert row interface additional, process auxiliary control circuit of machine tool by cable and this numerical control Large Rotor cannelure to be connected, realize the Synchronization Control that two equipment have combined the cannelure processing of rotor surface.

Between the chuck first armature spindle being clipped in main headstock 2 and the servo-actuated chuck of secondary headstock 3, the roller on 2 center bearing brackets 4 is placed in the motor shaft at rotor core root two ends, and the roller on center bearing bracket 4 can along with the adjustment of rotor turns.When processing the segmental arc of annular groove, clamping device 5 unclamps automatically, and main headstock 2, secondary headstock 3 transmission mechanism coordinate milling-boring machine Jin Give, and synchronous calibration rotates; When processing the Transverse straight trough section of annular groove, clamping device 5 automatically locks, and top, side oil cylinder coordinates milling-boring machine feeding synchronously afterburning, makes rotor keep axis centre constant.

Claims (1)

1. the auxiliary lathe of numerical control Large Rotor cannelure processing, comprise lathe bed (1), main headstock (2), secondary headstock (3), center bearing bracket (4), clamping device (5), it is characterized in that: the main headstock (2) with the gap calibration that disappears is fixed on lathe bed (1) one end, the rear-end of spindle of main headstock (2) is connected with main shaft checkout gear, secondary headstock (3) is slidably connected at lathe bed (1) other end, secondary headstock (3) is connected with servo-actuated chuck, the top afterbody of secondary headstock (3) is connected with top checkout gear, 2 center bearing brackets (4) are connected on lathe bed (1), clamping device (5) longitudinal sliding motion is connected on lathe bed (1).