CN201997718U

CN201997718U - Movable numerically controlled lathe headstock

Info

Publication number: CN201997718U
Application number: CN201120100436XU
Authority: CN
Inventors: 康凤明; 朱洪臣
Original assignee: Individual
Current assignee: Kang Zhenhui
Priority date: 2011-03-28
Filing date: 2011-03-28
Publication date: 2011-10-05
Anticipated expiration: 2021-03-28

Abstract

The utility model discloses a movable numerically controlled lathe headstock. The bottom surface of a headstock body is provided with a sliding guide rail surface and tapered iron, wherein both sides of the bottom of the headstock body are provided with guide rail pressure plates; the sliding guide rail surface, the tapered iron and the sliding surfaces of the guide rail pressure plates are bonded with a plastic guide rail surface, and are matched with the guide rail surface of a lathe body; and a headstock longitudinal numerically controlled ball screw feeding device is arranged on the lower part of the headstock and in the middle of a lathe body guide rail. The movable numerically controlled lathe headstock has a simple structure, is moved flexibly, is positioned accurately, and can be taken as a movable headstock of medium and large-sized horizontal numerically controlled lathes.

Description

Movable numerically-controlled Lathe Spindle Box

Technical field:

The utility model belongs to the Metal Cutting Machine Tool field, especially relates to a kind of movable numerically-controlled Lathe Spindle Box.

Background technology:

High speed development along with China's machinery manufacturing industry, demand to numerically controlled lathe is increasing, application number is 200520015887.8 utility model patent, the horizontal movable numerically-controlled row's cutter lathe of a kind of main spindle box is disclosed, it comprises: vehicle body, main spindle box, workbench, row's tool rest and numerical control device, lathe bed is the rectangular body structure, its top affixed two pairs of orthogonal longitudinal rails in space and cross slide way, main spindle box is installed in above a pair of cross slide way and is slidingly matched with it, workbench is installed in above a pair of longitudinal rail, and be slidingly matched with it, the row's of being equipped with tool rest on the workbench, the processing work clamping is on the claw of the front-end of spindle of main spindle box.Though main spindle box is removable in this structure, exist to use single, problem such as positioning accuracy is not high.

Summary of the invention:

The purpose of this utility model is: at the technical problem of above-mentioned existence, provide a kind of simple for structure, move flexibly, be widely used, the movable numerically-controlled Lathe Spindle Box of accurate positioning.

The technical solution of the utility model is: movable numerically-controlled Lathe Spindle Box comprises the main shaft casing, the main shaft case lid, spindle motor, main drive, main shaft, spindle motor is installed in main spindle box and covers, have slide guide rail and wedge in the bottom surface of main shaft casing, the two bottom sides of main shaft casing is equipped with guide rail clip, slide guide rail, the sliding surface of wedge and guide rail clip is pasted the plastic guide rail face and is matched with the bed ways face, forming the longitudinal movement rail of main spindle box pays, the bottom of main shaft casing, the centre of bed ways is provided with the ball-screw feed arrangement, the ball-screw feed arrangement drives main spindle box and vertically moves, the ball-screw feed arrangement comprises servomotor, ball-screw, the front and back bearings bearing, the ball-screw nut seat, bearing in groups, the stretching dished spring assembly, the ball-screw nut seat is arranged on the bottom of main spindle box, ball-screw by bearings in groups on the front and back bearings bearing, the front and back bearings bearing is fixed on the centre of two guide rails in lathe bed top, and the rear bearing bearing is outside by the stretching end tension of stretching dished spring assembly with ball-screw.

The beneficial effects of the utility model are: owing to have slide guide rail and wedge in the bottom surface of main shaft casing, the two bottom sides of main shaft casing is equipped with guide rail clip, makes accurate positioning; The plastic guide rail face is pasted in the bottom of main spindle box, and the longitudinal movement rail of this plastic guide rail face and bed ways face composition main spindle box is paid, and moves more flexible; The bottom of main spindle box, the centre of bed ways are provided with the vertical numerical control ball-screw of main spindle box feed arrangement, and in the ball-screw feed arrangement, the nut seat hole of ball-screw is arranged on the bottom of main spindle box, has realized numerical control main axle case vertically moving along bed ways.The utility model is simple for structure, can be used as medium-and-large-sized horizontal digital-control lathe packaged type main spindle box.

Description of drawings:

Fig. 1 is the front view of the movable numerically-controlled Lathe Spindle Box of the utility model;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the left view of Fig. 1;

Fig. 4 is the A-A partial sectional view of Fig. 3.

Figure labeling description: 1, main drive, 2, spindle motor, 3, the main shaft case lid, 4, main shaft, 5, chuck, 6, the main shaft casing, 7, feed arrangement, 8, the main spindle box protecgulum, 9, guide rail clip, 10, decelerator, 11, wedge, 12, nut seat, 13, screw, 14, screw, 15, shaft coupling, 16, locking nut, 17, oil sealing, 18, bearing in groups, 19, ball-screw, 20, rubber blanket, 21, the bearing outer ring gland, 22, locking nut, 23, dish spring pressure ring, 24, stretching dish spring, 25, the bearing inner race pressure ring, 26, the rear bearing bearing, 27, nut, 28, the bearing inner race pressure ring, 29, the bearing outer ring gland, 30, the servomotor support, 31, servomotor, 32, guide pass, 33, the fore bearing bearing.

The specific embodiment:

From the left view of the vertical view of front view of the present utility model shown in Figure 1, Fig. 2, Fig. 3 as can be seen: the movable numerically-controlled Lathe Spindle Box of the utility model mainly contains: compositions such as main shaft casing 6, main shaft case lid 3, spindle motor 2, main drive 1, main shaft 4, chuck 5, wedge 11, guide rail clip 9, ball-screw feed arrangement 7, trip bolt 13.

Fig. 4 is the A-A partial sectional view of Fig. 3, structure for the ball-screw feed arrangement, as can be seen from the figure, ball-screw feed arrangement 7 mainly contains: servomotor 31, servomotor support 30, no gap yielding coupling 15, pretension ball-screw assembly, fore bearing bearing 33, rear bearing bearing 26, ball-screw nut seat 12, bearing 18 in groups, bearing outer ring gland 29,21, bearing inner race pressure ring 28,25, oil sealing 17, bearing inner race locking nut 16, ball-screw body prestretched dish spring 24, dish spring pressure ring 23, locking nut 22, buffer rubber gasket 20 compositions such as grade.

The blank of main shaft casing 6 is formed by the casting of high-quality grey cast-iron, carries out stress relief annealing before and after the roughing respectively, to guarantee the later precision stability of casing fine finishining.Have slide guide rail 32 and wedge 11 in the bottom surface of main shaft casing 6, the two bottom sides of main shaft casing 6 is equipped with guide rail clip 9, guide rail clip 9 is fixed on the bottom of main shaft casing by trip bolt 14, the sliding surface of slide guide rail 32 and wedge 11, guide rail clip 9, all be to paste after the polytetrafluoroethylplastic plastic guide rail plate, with the bed ways face is benchmark, scraping and be ground into vertically (along the bed ways direction) moving guide rail and pay, can be forms such as the rectangle line slideway is paid, a flat V line slideway is paid, two V line slideways are paid.

Spindle motor 2 adopts Digit Control Machine Tool AC servo spindle drive motor or ac variable-frequency electric motor commonly used, is installed on the main shaft case lid 3 on main spindle box top, imports main spindle box into being with synchronously.The front-end of spindle of main spindle box 6 can the installation code chuck, top etc. attaching.Ball-screw 19 adopts the special-purpose 60 degree angular contact balls of identical ball-screw bearing 18 in groups, be supported on the front and back bearings bearing 33,26, front and back bearings bearing 33,26 directly is fastened on the centre of two guide rails in lathe bed top, front and back bearings bearing installed surface and bed ways face on the lathe bed grind simultaneously, and be parallel with the bed ways face with the front and back bearings bearing installed surface that guarantees ball-screw 19.Front and back bearings bearing 33,26 physical dimensions are identical, installing fastening can accurately grind in advance, its bearing mount pad hole is identical with hole shoulder dimensional tolerance, and 18 outer rings of bearing in groups in the front and back bearings bearing 33,26 are pressed in the bearing block with identical bearing outer ring gland 29,21.The cylindrical of fore bearing bearing 33 usefulness bearing outer ring glands 29 is as the rim of the mouth, location of the mounting bracket of servomotor, bearing inner race in groups in the fore bearing bearing 33 makes the stiff end (motor side) of leading screw body and fore bearing bearing 33 axially connect to one reliably with bearing inner race pressure ring 28 and locking nut 16 lockings.The bearing inner race in groups in the rear bearing bearing 26 and the stretching end of ball-screw 19 adopt little matched in clearance, with bearing inner race pressure ring 25, stretching dish spring 24, dish spring pressure ring 23 and locking nut 22 the stretching end of leading screw body are strained all the time.The stretch prestretching force of dished spring assembly of end of leading screw should be able to guarantee the prestretched amount of leading screw body, compensation expand with heat and contract with cold change in, the maximum axial force of being born when being not less than feed screw nut work all the time.Feed screw nut seat 12 is used for axially installing and fixing the nut 27 of ball-screw, feed screw nut seat 12 can be cast as one with main shaft casing 6, also can make with the split of main shaft casing, be tightened to one with screw 13 and taper pin and main spindle box then, be tightened to one no matter be after being cast as one or split manufacturing, the nut bore of feed screw nut seat 12 and nut all adopt big matched in clearance, the installation end face precision-fit of the nose end of nut bore and ball-screw nut 27, reliably fastening.The seat hole downside of feed screw nut seat 12 is left the opening bigger slightly than leading screw body diameter simultaneously, so that install and maintenance.The two ends of ball-screw body all process tang, so that ball-screw 19 and front and back bearings bearing 33,26 manually detect the rotating sensitivity of leading screw body after also prestretched is installed on the lathe bed.

Feed arrangement 7 drives between the power shaft with the output shaft of servomotor 31 and ball-screw 19, directly with 15 connections of no gap yielding coupling, also can be installed on the front-end bearing pedestal 33 with the decelerator bearing by after the planetary reducer deceleration again.Adopt seamless connectivity between servomotor and the planetary reducer power shaft, between the power shaft of reducer output shaft and ball-screw, connect with no gap yielding coupling, to guarantee the no gap of whole driving-chain.

Claims

1. movable numerically-controlled Lathe Spindle Box, comprise main shaft casing (6), main shaft case lid (3), spindle motor (2), main drive (1), main shaft (4), spindle motor (2) is installed on the main shaft case lid (3), it is characterized in that: have slide guide rail (32) and wedge (11) in the bottom surface of main shaft casing (6), the two bottom sides of main shaft casing (6) is equipped with guide rail clip (9), described slide guide rail (32), the sliding surface of wedge (11) and guide rail clip is pasted the plastic guide rail face and is matched with the bed ways face, the bottom of main shaft casing (6), the centre of bed ways is provided with ball-screw feed arrangement (7), ball-screw feed arrangement (7) drives main shaft casing (6) and vertically moves, described ball-screw feed arrangement (7) comprises servomotor (31), ball-screw (19), front and back bearings bearing (33,26), ball-screw nut seat (12), bearing (18) in groups, the stretching dished spring assembly, ball-screw nut seat (12) is arranged on the bottom of main shaft casing (6), ball-screw (19) is supported on front and back bearings bearing (33 by bearing (18) in groups, 26) on, front and back bearings bearing (33,26) be fixed on the centre of two guide rails in lathe bed top, rear bearing bearing (26) is outside to be strained the stretching end of ball-screw (19) by the stretching dished spring assembly.

2. movable numerically-controlled Lathe Spindle Box according to claim 1 is characterized in that: the sliding surface of the slide guide rail (32) of main shaft casing (6) bottom surface, wedge (11), guide rail clip is pasted polytetrafluoroethylplastic plastic guide rail plate.