JPS58132402A - Automatic lathe - Google Patents

Abstract

PURPOSE:To increase productibity in using two tool turrets alternately as well as to improve the dischargeability of chips, in case of an automatic lathe. CONSTITUTION:At a position in front of a headstock, a tble 15 being set up across both sides of a guide bush unit 11 is connectedly attached unifically to both-side positions of the guide bush unit 11 installed on a bed 5 while tool turrets 19a and 19b arranged at both sides of the guide bush are fitly installed on this table 15 and a relief part 125 is formed at a position where the said table 15 corresponds to the guide bush unit 11. For this reason, there is no obstacle in a dropping direction of chips so that not only the dischargeability of chips is bettered but also machinability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a headstock movable automatic lathe equipped with a guide bushing W'l.

Conventional automatic lathes with movable headstocks have a tool stand placed opposite the front of the main stand, and this tool stand is equipped with a guide bush that supports the workpiece material supported by the main shaft of the headstock. At the same time, a plurality of bits for cutting the workpiece material at the mouth of this guide bush are arranged radially at right angles to the main sK, and these bits are configured to freely move back and forth in the radial direction of the material. Met. Therefore, concentrating the tips of the radially arranged bits toward the center of the mouth of the guide bushing is suitable for cutting products with high flf, arranging the bits, checking the processing status of the product, etc. On the other hand, the rigidity of the tool stand and guide bushing device, which can be placed in a limited space, has the disadvantage that it is not suitable for powerful cutting, and furthermore, the removal of chips is very poor. Met. In addition, it takes time to index and position the turret, which results in a large idle time and poor productivity.In a turret lathe where the 2116i turrets are placed close to each other to process the workpiece material, the turrets cannot be used interchangeably. This creates a risk of collision with the machine, and if expensive machinery is damaged, the loss is extremely large.

This invention was made by focusing on such conventional drawbacks, and its purpose is to shorten idle time, improve productivity, and eliminate the risk of turrets colliding with each other. To provide an automatic lathe with improved chip evacuation so that the sliding surface is not damaged by chips, etc.

In order to achieve the above-mentioned object, the present invention provides integrally connected tables arranged on both sides of one guide bushing-equipped crucian carp at both open positions of the guide bushings. The main feature is that the table is provided with tool holding turrets V arranged on both sides of the bush, and the table has a relief part formed at a position corresponding to the guide bush device.

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in Fig. 1, a bed 5 is provided on the upper part of the machine base 3 of the automatic lathe l, and a reciprocating slide is installed on the upper part of the bed 5 along the Y-Y' force direction (longitudinal direction of the bed 5). A movable headstock 7 is also provided. The headstock 7 is formed into a rigid box shape so as to withstand strong cutting, and the sliding portion with the pet 5 employs a periphery flat sliding system.

The front part in the sliding direction of the headstock 7 <Y' end part As shown, the guide bush device 11 supporting the material M4
is aligned with the main shaft centering machine and fixed by bolts 13.

Further, on the upper part of the table pace 9, a guide bushing device 11' is disposed in a direction perpendicular to the spindle center line (X-
A table 15 that is slidable in the X' direction is mounted.

The upper part of this table 15 has a main axis center aiv
A pair (two) of blade feed stands 17a are sandwiched between them.

(2) 7'b are provided at appropriate intervals. The tool feed stands 17a, 17b4C are provided with turrets 19a, 19b, respectively, for supporting (holding) a plurality of machining tools rotatably supported in parallel with the spindle center machine. It is also possible to attach an attachment device for holding a long product Y, a center support mounting device, a secondary processing device, etc. to the pace 21 placed at the front lower part of the turrets 19a and 19b, if necessary. be. 2
3 is a supply device that supplies a long material M4 at the rear of the headstock 4. 25 is a cover.

As shown in FIG. 2, a hollow cylindrical main shaft 29 is rotatably supported on the upper part of the headstock 7 via two number of bearings 27a, 27bi. A sleeve 31 is provided inside the main shaft 29, and a spindle cap 33.
A collet chuck 37 is provided via a collet sleeve 35. Further, from the tip to the rear end of the sleeve 31, a guide bush rotation drive mechanism 73 (described later)
, a chuck opening/closing mechanism 45 (described later), and a driven pulley 41 interlocked with a main shaft drive body (not shown) via a belt 39 are provided at predetermined intervals. The portion is covered by a cover 43 supported by the headstock 7. Next, the chuck opening/closing mechanism 45 will be explained.

A hollow cylindrical sleeve 31 is slidably inserted into the main shaft 29, and a slide sleeve 49 having a tapered surface 47 is slidably inserted into the outer periphery of one end of the main shaft 29. This slide sleeve 49 also has a bearing 51.
A bearing case 53 having an engagement groove (not shown) on its outer periphery is fitted through the bearing case 53 .

A long groove 57 is formed in a part of the main shaft 29 and the sleeve 31 to accommodate an opening/closing pawl 55 that makes sliding contact with the circumferential surface and the tapered surface 47 of the slide sleeve 49 . It is rotatably supported.

Further, a spring 61 interposed between the collet sleeve 35 and the sleeve 31 is provided on the -m wall of the opening/closing claw 55.
One end of the sleeve 31, which is biased by the force, is in contact with the sleeve 31.

Therefore, in order to move the collet chuck 37 from the closed state as shown in FIG. , bearing case 53. Slide sleeve 49
moves along the main axis 11129 to the collet chuck 37. As a result, the opening/closing pawl 55 that was in contact with the surface of the slide sleeve 49 slides on the tapered surface 47 of the slide sleeve 49 by the sleeve 31 biased by the elastic force of the spring 61, and the taper pin 59 Rotates in the closing direction using the fulcrum as a fulcrum.

When the opening/closing pawl 55 rotates in a certain direction, the sleeve 31 in contact with the opening/closing pawl 55 retreats due to the elastic force of the spring 61, and at the same time, the collet sleeve 35 also retreats and the collet chuck 37 is opened.

Also, the collet chuck 37 is changed from the open state to the closed state 1aK.
To do this, if the rocking body 65 is rocked in the opposite direction to the above,
The slide sleeve 49 retreats along the main shaft 29 via the swinging body 65, and at the same time, the opening/closing pawl 55 that comes into contact with the tapered surface 47 of the slide sleeve 49 rotates in the opening direction while being pressed by the tapered surface 47. And this opening/closing claw 55
31 moves in the direction of the collet chuck 37 while being pressed against the elastic force of the spring 61, and along with this, the collet sleeve 35 also moves toward the collet chuck 37.
The collet chuck 37 is closed by pressing the taper surface 37aY of No. 7 and moving.

A pulley main shaft 67 is fitted into the rear part of the main shaft 29 (left part in FIG. 2), and a bearing 6 is inserted into this pulley main shaft 67.
The driven pulley 41, which is rotatably supported via Sl, is connected to a main shaft drive body (not shown) via a bell 39'kj'l. Note that the driven pulley 41 is connected to the main shaft 29 via a key 71Y.

Next, the guide bush rotation drive mechanism 73 and the guide bush device 11 will be explained. A gear 77 is fixed to the front part of the main shaft 29 via a key 75. Further, a rotatable spline shaft 79 arranged parallel to the main shaft 411129 is provided to transmit the rotation of the main shaft 29 to the guide bushing device 11&C. A slidable ball bearing 81 is fitted into this spline shaft 79 via a ball bush (not shown).
A gear 85, which is fixed via a key 83, is rotatably supported on the headstock 7 via a bearing 87'l+'.
It is always in mesh with the gear 77. 89
is a nut positioned so that the gear 85 does not move in the axial direction with respect to the headstock 7.

The front part of the spline shaft 79 is supported by a bearing 93 fitted to a guide bush support 91 which is fixed to the machine base 3 and fixed table base 9 with bolts 13. 91 is prevented from moving in the axial direction.

The gear 99, which is fixed to the front part of the spline shaft 79 via a key 97, is fixed to the rotating sleeve 103 and the key 1051, which are supported on the guide bush support 91 via bearings 101a and 101bY. gear 10
7. They are always engaged. Reference numeral 109 is a guide bushing that supports the material M fitted into the rotary sleeve 103, and is configured so that the gap between it and the material M can be adjusted to vj4 by resisting the bullet 111 with a nut 113. At this time, since the gear 77 and the gear 107, and the gear 85 and the gear 99 have the same number of teeth in the span, the rotation of the main shaft 29 is caused by the rotation of the gear 77, the gear 85, and the gear 99.
Spline shaft 79. Gear 99. It is transmitted to the guide bush 109 via the gear 107 in the same direction and at the same speed without being affected by the sliding movement of the headstock 7. Moreover, the material M can slide only in the axial direction without causing any slippage in the rotational direction. Therefore, the guide bushing 73 can easily support even materials that are prone to seizure or irregularly shaped materials. Reference numeral 76 denotes a notch provided in the table 9, and the space between the guide bushing 109 and the guide bushing 109 is covered with an appropriate cover (not shown) K, so that when the table 15 slides (moves), the guide bushing support base is used. The notch width is large enough not to interfere with 91.

As shown in FIGS. 3 and 4, 115 is a feed screw 117.
It is fixed integrally with the headstock 7, which is slidably placed on the bed 5, by means of a feed nut 9 that is screwed together. Feed screw 117
is supported at one end by a bearing 119 fixed to the machine base 3, and is connected to the longitudinal direction feed motor 1 via a speed change mechanism (not shown).
It is connected to 21. 123 is a feed screw cover.

By controlling the rotation of the longitudinal direction feed motor 1210 using a numerical control device or the like, the feed screw 117. The headstock 7 can be moved and positioned relative to the guide bushing device 11 via the feed nut 1ll. The table 15, which has sufficient rigidity and is rigidly fixed, is provided with a relief portion 125 in order to release a portion that interferes with the guide bushing device 11 when the table 15 slides. Except for this, the left and right sides of the table 15 are integrated. The table 15 is equipped with a feed screw (not shown) K driven by a lateral self-feeding remoter 127.
Therefore, it slides K (, 4! l movement) on the table base 9 in a direction perpendicular to the spindle center line (in the radial direction of the material M). In addition,
The table 5 is equipped with a base clamp device (not shown) that can freely grip the table pace 9, and during cutting, if necessary, the table 15t is integrated with the table base 9 by the action of attaching this pace clamp. Can be fixed.

Since the power is distributed to the guide bushing device 11'Y on the table base 9, which is the sliding guide surface of the table 15, the moment load conditions caused by the main cutting force are very good, and the table structure can be organized with a small number of bases. ing. The blade feed stand 178.17bK, which is firmly fixed on the table 15 with the guide bushing device 7 interposed therebetween, has turret drive motors 129a and 129b attached thereto.

The output shaft 131 of the turret drive motor 129a and the gear 133 are connected, and the gears 135, 137, 139, 1
The turret 19ii attached to the turret rotating shaft 147Kbii11 is indexed and rotated via the gear 143 and the key 145 via the gear 143 and the key 145.

Since the turret 19b also has the same driving configuration as the turret 19a, explanation 8A will be omitted. Said knife feed stand ■7a, 17
bK A drive shaft 149 is rotatably supported via a bearing 151 in the hollow portion of the turret pivot shaft 147, which is rotatably supported.

Further, one end of the drive shaft 149 includes a drive source (not shown).

) is fixed, and a bevel gear 155 is fixed to the other end (turret III) &c. A rotary tool device 157 for secondary processing mounted on the tool mounting surface of the turrets 19a, 19b has a bevel gear 159. which is meshed with the bevel gear 155. Bevel gears 161, 163, 165, 16
After 7Y, the tool T is rotated. Further, at the extended end of the turret rotation shaft 147, a turret) 19a,
A proximity switch (not shown) is provided for checking the stop position of the tool 19b and the index position of various tools. In addition, multiple processing tools (bits, drills, milling cutters, etc.) supported by turrets 19m and 19bK can be placed in the radial direction K with respect to the rotation center ill of the turret, and in the direction orthogonal to one person in the opposite direction. be.

Note that the tools on the turret that are close to the guide bushing device 11 and the tools on the turret that are waiting for the next machining are located at positions where they do not protrude beyond the limit lft toward the other turret. I'm keeping in touch.

Also, if the tool specified by the numerical control device etc. is at the spindle center H.
After the blades 19a and 19b are indexed to the position facing the IK, the blade feed stands 17a and 171)K are positioned.

Next, the operation of the automatic lathe constructed as described above will be explained.

The material M is gripped by the collet chuck 37 which is disposed in front of the main shaft 29, and is rotatably supported by the guide bush 109 provided in front of it.
A plurality of machining tools TK supported by turrets 19a and 19bK selected by commands from a numerical control device etc.
Therefore, cutting is performed. First, the main shaft 29 and the guide bush 109 are driven to rotate. Then, when the headstock 7 is at the most advanced position and the collet chuck 37 is in the open state, a new material M is transferred to the collet chuck 37. The guide bushing 109 is inserted into the turret 19a.

A material feeder or the like is used to feed the material to a position where its tip contacts the positioning tool T (actual sieve or stopper member, etc.) 19b. Then, the headstock 7 is moved backward by the longitudinal feed motor 121C by an appropriate distance to shortcut the tip of the newly loaded material M on the automatic lathe lK, and the material M is gripped by closing the collet chuck 37. .

Next, at the position where the headstock 7 is tilted forward to the most forward position, a short cut is made to cut the tip of the material M into chips or small fragments using the cutting tools TK of the turrets 19a and 19b. Then, the headstock 7 is moved back by a distance suitable for the length of the product, the material M is gripped by the collet chuck 37, and the material MK is fed by 1 fCE of movement of the headstock 7. and,
A table 15 perpendicular to the spindle center line is moved in front of the headstock 7 in the sliding direction by the lateral feed motor L27 (
After moving forward and backward) and positioning at the appropriate position, move the tower) 1
The tools T 9a and 19b approach the mouth of the guide bush 730 and process the material M. At this time, while cutting material M with a tool supported by one turret,
After the tool supported by the other turret, which is separated from the guide bushing device 11 by a direction 11Vc, is indexed by a command from a numerical control device or the like, it is positioned and placed in a waiting area. When the cutting process with the tool of one turret is finished, the table 15 is moved (backward) in the direction away from the guide bushing device IT by the lateral feed motor 127, and at the same time, the tool of the other turret is moved to the guide bushing device IT. The device 11c approaches and applies the next cutting process to the material M.

As mentioned above, K, 2 turrets in 1 processing step until cutting 1 product from material M) 19 a.

19b is used alternately to cut the material M. In this way, the long material fed from the rear part of the spindle by the material feeder is sequentially fed out by the headstock and fed into the continuous processing field by the tool at the mouth of the guide bush.

As can be understood from the description of the embodiments above, the present invention provides a table disposed on both sides of the guide bushing device mounted on the bed at the front position of the headstock and across both IIIKs of the guide bushing device. are integrally connected and provided, and tool holding turrets are attached to the table on both sides of the guide bushing, and a recess is formed at a position where the table corresponds to the guide bushing device. Because of this, there are no obstacles in the direction of the chips falling (and the chip evacuation is very good, so there are fewer scratches on the sliding surfaces, improving work efficiency. .

Also, when the tool on one turret is cutting,
It becomes possible to select the tool on the other turret, and by using these two tools alternately, the idle time during tool selection can be significantly shortened and work efficiency can be improved.

In addition, since the blade feed stand supporting each turret is provided on a common table, it is not necessary to provide separate feed mechanisms for each, resulting in significant effects such as an improvement in n-degree and a reduction in manufacturing costs.

Note that the present invention is not limited to the above-mentioned embodiments, and can be practiced in other ways.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of an automatic lathe embodying the present invention, Fig. 2 is a vertical sectional view along the main shaft center line of the main shaft and guide bushing device, and Fig. 3 is an automatic lathe embodying the present invention. A partially cutaway front view of the board, and FIG. 4 is a partially cutaway right side view. (Explanation of the main symbols shown in the drawings) 1...Automatic disc 5...Ped 11-°Guide push-pull 15...Cheeple 19a, 19b-Turret 125-° Escape Department Patent Applicant Azumashimamoto Co., Ltd. Procedural Amendment (Voluntary) Date of Month No. 1, 1980 Harujo Shimada, Commissioner of the Japan Patent Office 1, Indication of Case Patent Application No. 143964 No. 1983 2
Name of the invention Automatic lathe 3, Relationship with the case of the person making the amendment Patent applicant Address (residence) 2-132 Momoyama-cho, Niigata City, Niigata Prefecture Name: Azumashimamoto Co., Ltd. Representative Higashi Shibu 4, Agent Postal code 105 Address: 8th floor, Toranomon Building, 1-18, 1-chome, Toranomon, Minato-ku, Tokyo (Delivery date: Month, Day, 1939) 4-Responsibility\(1) Column 7 for detailed explanation of the invention in the specification, Contents of amendment ( 1) On page 10, line 11111 of the specification, "r guide bushing 73" is corrected to "guide bushing 109." (2) In the 13th line of page 10 of the specification, the statement ``76 was provided in table 9'' was corrected to ``125 was provided in table 15.'' (3) In lines 8 to 9 of page 12 of the specification, the phrase "[Guide bushing device]" is corrected to "Guide bushing device 11J." (4) Specification page 15, line 17 to pft line 18 ζ
The text "Guide bushing 73" has been corrected to "Guide bushing 109." Above 10-

Claims (1)

[Claims] In a headstock movable automatic lathe in which a headstock is mounted on a bed so as to be slidable in the axial direction, guide bushings are mounted on both sides of a guide bushing device mounted on the bed at a position in front of the headstock.
A table placed on both sides of the guide bushing device is integrally connected to the table, and a turret V for holding tools, which is electrically distributed to both sides of the guide bushing, is attached to this table, so that the table can be used as a guide. An automatic lathe characterized by forming a relief part at a position corresponding to a bushing device.