JPH04146002A - Auxiliary spindle stock moving type automatic lathe mechanism attached to spindle moving type automatic lathe - Google Patents

Abstract

PURPOSE:To extensively improve process efficiency by arranging an auxiliary spindle stock with a drive motor synchronously controlled with rotation of a spindle mounted on a base capable of horizontal movement in the X, Y direction and oscillating movement on the extension of a spindle line in front of a guide bush and also arranging a tool stock on the side. CONSTITUTION:An auxiliary spindle stock 4 is arranged on the extension of the spindle line of a guide bush 1 and a tool stock 5 is arranged on its side. A motor 23 is to be synchronously controlled with rotation of a spindle. Thereby, it comes possible to turn a bar material held on a spindle stock. By a function of turning and sliding in the direction orthogonal to each other, it is possible to carry out alignment, approach turning, retreat separation and orthogonal oscillation of the spindle 6 against the bar material on the spindle stock. A tool stock 5 for secondary processing is arranged in this oscillating direction. The tool stock 5 is only to index a cutting tool and a drill at specified positions and any advance-retreat capacity of the cutting tool and the drill is not particularly required. It is because the auxiliary spindle stock 4 has an X, Y horizontal movement function and accordingly, it is possible to carry out desired cutting.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a sub-headstock moving automatic lathe mechanism attached to a headstock moving automatic lathe.

``Prior technology'' A moving headstock automatic lathe, which is one of the automatic lathes for processing bar materials, has a main shaft that chucks and rotates the bar material, and a bed that slides on the bed to give the main shaft linear movement in the axial direction. A moving head stock, a tool post that can be moved in a direction perpendicular to the sliding direction of the head stock, various types of cutting tools such as bits and drills that are attached to this tool post and that cut the above-mentioned bar material, and a bar. The main structure consists of a guide bushing that rotatably supports the material near the processing position and prevents bending and deformation of the workpiece material due to cutting.

That is, the bar chucked by the spindle and subjected to rotational motion is fed in the axial direction by the sliding movement of the headstock, and is cut by a predetermined knife attached to the tool rest.

Therefore, since a guide bushing is used, it has high locking properties against cutting force and is suitable for precision machining of long and thin parts.Furthermore, it can be used for various secondary machining such as horizontal hole drilling, keyway machining, and back machining. The feature is that it can be done on a single lathe by using attachments.

The various attachments described above may be equipped on a limited radial line on the same level as the cutting blade when it comes to arranging the turret on the side of the spindle line, or As proposed in Japanese Patent No. 62-240351, it is sometimes provided as an attachment to a tool rest that can be moved.

``Problems to be Solved by the Invention'' However, the various means for creating ridges are all aimed at making use of the advantage that high-precision machining is possible because the bar is supported by a guide bushing, without abandoning it. Yes, but
In this case, the attachments are not only concentrated in the vicinity of the guide bushing where there is only limited space, which complicates the process, but also causes the following unreasonableness.

In other words, in a series of various types of machining, there are those that require high precision and require the bar to be supported by a guide bushing, and those that do not require as much precision.
There are also some that do not require special support by a guide bush.

In this way, since the guide bush is restrained even in machining that does not require special support by the guide bush, it becomes difficult to expect effective use of the guide bush, that is, high efficiency utilization of high precision machining. ing.

The present invention is a series of cutting operations that require high precision and are completed with the support of a guide bushing, and then the machining that does not require high precision is performed using the guide bushing support. This machine is attached to an automatic lathe with a moving headstock that allows the bar stock to be replaced and processed without the support of the guide bushing, making high efficiency use of the guide bushing, and thus greatly improving machining efficiency. The purpose of the present invention is to provide a sub-headstock moving type automatic lathe mechanism.

[Means for Solving the Problems] In order to achieve the above object, the sub-headstock movable automatic lathe mechanism of the present invention provides horizontal movement in the x and Y directions as well as swing rotation on the extension of the main spindle line in front of the guide shaft. A sub-headstock with a drive source that is controlled in synchronization with the rotation of the main spindle mounted on a flexible base is disposed, and a tool rest is disposed on the side of the sub-headstock.

The above-mentioned side-positioned tool rest has two piston rods mounted on a twin cylinder block with a separate configuration for both the Wespaul, which is the mounting base for the cutting tool and the drill, and the Sisterpole, which serves as the slide guide base for the Wespol. One side is fixed to the sister pole side so that the cylinder block can be moved to two extreme positions corresponding to the stroke of the piston rod with respect to the sister pole, and the other piston rod is fixed to the west pole side so that the cylinder block can be moved to two extreme positions corresponding to the stroke of the piston rod. may be made movable relative to the cylinder block to an extreme position corresponding to the stroke of the piston rod, so that the weath pole may be movable to four different positions relative to the sister pole.

``Operation'' The sub-headstock moving type automatic lathe mechanism configured as described above moves the sub-headstock close to each other on the spindle line and is supported by a guide bushing to perform only high-precision cutting. It repositions and supports the bar that has been made, then moves back and swings its head to face the tool rest placed on the side. After that, x, Y
The directional horizontal movement function allows each cutting blade of the tool rest to act on the bar material to perform machining that does not require very high precision, while the guide bush performs high precision machining of the next bar material. It is possible to improve machining efficiency.

When the tool rest is configured as described in claim 2, the cutting tool and the drill can be quickly indexed, and high efficiency can be expected.

"Example" Examples will be described with reference to the drawings.

In the figure, reference numeral 1 indicates a guide bushing, 2 indicates a tool rest that is attached to the bushing base frame and is movable, and reference numeral 3 indicates an attachment provided to the tool rest 2.

The sub-headstock 4 is arranged on the extension of the main axis line of the guide pusher 51, and the tool rest 5 is arranged on the side thereof.

The auxiliary headstock 4, which repositions and supports the bar material cut by the guide bushing 1, supports the bar material with a chuck like the main spindle, and its spindle 6 is a spindle attached to a frame 7 that is machined with a crinkled top. It is supported by a bearing on the bracket 8 in a locking relationship similar to the main shaft. That is, in the figure, 9.10 is a bearing for supporting the spindle 6, 11 is a spindle collar, 12 is a pull sleeve, 13 is a chucking sleeve, 14 is a chuck puller, 15 is a spindle oil collar, 16 is a spindle holder, 17 is a spindle bare screw, 1B is the spindle nut, 19 is the key, 2
0 is the spindle pulley, 21 is the chuck spring,
22 is a chucking joint, 23 is a motor attached to the motor bracket 24 attached to the frame 7, 25 is a motor pulley, 26 is a timing belt stretched between the motor pulley 25 and the spindle pulley 20; It is assumed that the motor 23 is controlled in synchronization with the rotation of the main shaft. This makes it possible to reload and support the bar material being held on the headstock.

27 is a chuck switching bar. A frame 7 carrying a ridged spindle 6 is slidably mounted on the weath pole 28. That is, the frame 7 is loosely fitted to the upright rotating shaft 29 such that it penetrates through the frame 7 from the center of the waste ball 28, and the built-in rack cylinder 31 is relatively movably fitted to the rotating shaft 29, which is attached to the rotating shaft 29. The racks 32 are engaged with each other.

As a result, the frame 7 side slides and rotates around the rotation shaft 29 due to the reciprocating movement of the rack cylinder 31.

In the figure, 33 is a turning collar, 34 is a turning sleeve, 35 is a rack sleeve, and 36 is a rack cylinder lid.

The frame 7 is positioned at two positions on the weath pole 28 corresponding to the extreme ends of the rack cylinder 31. The positioning is such that the spindle 6 is parallel to the main axis line and at right angles to the main axis line. this is,
A positioning hole 40 in which a diving pin 39 is attached to the tip of a diving cylinder 37 provided on the frame 7 side under the bias of a diving spring 38 is provided on the welt pole 28 side.
It is done by fitting and removing it. The waste pole 28 is slidably mounted on the sister pole 41 via guide pushers 42, 42. Its sliding direction is perpendicular to the main axis line. That is, the motor 440 attached to the motor bracket 43 provided on the sister pole 41
By assembling the pole screw 45 into the screw hole 46 of the wess pole 2B, it slides back and forth. The sister pole 41 is slidably placed on the bed via guides 47, 47. Its sliding direction is parallel to the main axis line. That is, by assembling the pole screw 50 of the motor 49 attached to the motor bracket 48 provided on the bed into the screw hole 51 of the sister pole 41, it slides back and forth.

Due to the ability to rotate on the ridges and slide in directions perpendicular to each other,
It is possible to center the spindle 6 with respect to the bar of the headstock, approach and reposition it, retreat and leave it, and oscillate it at right angles.

A tool rest 5 for secondary processing is arranged in the direction of the swing. The tool rest 5 only needs to index the tool and drill to the predetermined position (separate tool).

The ability to advance and retreat the drill is not required. This is because the sub-headstock 4 on the ridge has an X and Y horizontal movement function, which allows desired cutting to be performed.

The illustrated example of the tool rest 5 is the same as that of the Japanese Patent Application Laid-Open No. 62-24 of the present application as described above.
It uses the position indexing mechanism proposed in No. 0351,
Determine the 4-position position. That is, numeral 53 in the figure is a twin cylinder block having cylinders 55 and 56, and this cylinder block has the sister pole 57 and the groove in the accommodation groove 58 carved in the sister pole 57 which is set upright on the bed 54. Wes pole 5 assembled in a manner that covers 58
9 are arranged in a separate state without contact with both of them as described below.

Cylinder 55. 56 are pistons 60. 6bt
The cylinders have cylinder lids 62.62' and 63.63', and although their mutual strokes may be different, the cylinder volumes must be designed to be the same so that they can operate synchronously.

The cylinder lid 62 holding the piston 60 is held by an oil supply sleeve 64 fixed to the sister pole 57, and the cylinder lid 62' on the opposite side is held by the sister pole 57.
It is held in a refueling sleeve 65 fixed to.

A position adjustment screw 66 is formed at one end of the piston 60 and is fixed to a bracket 67 fixed to the weath pole 59.

Thus, the piston 60 and the wespole 59 are in an integral relationship. The other end of the piston 60 is the cylinder lid 6
It hits the position adjustment screw 68 provided at the tip of 2'. One end of the piston 61 is connected to the sister pole 57 by a cylinder positioning collar 69 and a cylinder fixing nut 70.
Fixed.

Thus, the piston 61 and the sister pole 57 are integrally connected. On the other hand, the other end of the piston 61 is held by a hollow position adjustment screw 71 screwed into the sister pole 57.

Thus, the cylinder block 53, which is separated from both the sister pole 57 and the wester pole 59 and is floating in the groove 58, is reciprocated by the stroke thereof by the operation of the piston 61.

Accordingly, the cylinder lid 62 is replaced by the oil supply sleeve 6.
4, the cylinder cover 62' slides within the oil supply sleeve 65 along with the cylinder block 53 by the same stroke.

Due to the ridge configuration, the combination of the two extreme positions and postures of the pistons 60 and 61 allows the weath pole 59 to be placed in four positions. In the figure, reference numeral 52 denotes a guide interposed between the wess pole 59 and the sister pole 57. On the wespole 59, there is a tool holder 72 in which tools and drills are arranged according to the position spacing on the ridge.
, a drill holder 73 is attached.

Therefore, with such a tool post 4, the position of each position can be adjusted, and the position selection can be done easily and stably from any position by switching the oil passage toward the ultimate position at the same speed. This allows for quick position selection.

Furthermore, near the limit, the oil retreat path becomes a bottleneck, increasing resistance, and has the advantage of automatically braking to prevent impact.

Bars that are reloaded, such as on ridges, cannot enjoy cutting as they should with the support of the guide bushings. In other words, high precision machining is not suitable.

Therefore, if high-precision machining is performed on the headstock supported by the guide bushing, and machining that does not require very high precision is transferred to the sub-headstock 4, the utilization of the guide bushing will be improved. Since secondary machining can be performed continuously on the same lathe, efficiency is significantly improved.

"Effects of the Invention" Since the present invention is configured as described above, it produces the effects described below.

[1] A single automatic lathe with a moving headstock can perform high-precision machining using a guide bushing and machining that does not require high precision without constraining the guide bushing in assembly-line operations, significantly improving efficiency. do.

(2) When the turret for the sub-headstock is configured as claimed in claim 2, indexing of the cutting tool and the drill is quick and suitable.

[Brief explanation of drawings]

Fig. 1 is a view of the spindle of the sub-headstock of the present invention, and Fig. 2
The figure is a front view of the by-product spindle seen longitudinally along the spindle axis, Figure 3.4 is the same side view, Figures 5-6 are the same plan view, and Figure 7 is the same side view.
The figure is a top view of the X and Y horizontal movement mechanism of the sub-headstock, No. 8
The figure is an explanatory diagram of the position indexing mechanism of the tool rest, Fig. 9a-
%-c is ipsilateral, positive. Bottom view, Figure 10 is a facing view of the sub-headstock and tool rest, Figure 1
FIG. 1 is a diagram showing the relationship between the guide bushing and the oscillating sub-headstock, and FIG. 12 is a diagram showing the relationship between the guide bushing, the oscillating sub-headstock and the tool rest. 1... Guide bush, 2... Turret, 3
... Attachment, 4... Sub-headstock, 5...
・Turret, 6... Spindle, 7... Frame, 8... Spindle bracket, 9.10.
...Spindle support bearing, 11...Spindle collar 12...Hook sleeve, 13...Chucking sleeve, 14...Chuck pull, 15
...Spindle collar, 16...Spindle flap, 17...Spindle bare screw, 18...Spindle nut, 19...Key, 20...Spindle pulley, 21...Chuck spring, 22・
...Chucking, 23...Motor 24.
...Motor bracket, 25...Motor pulley, 26...Timing belt, 27...Chuck switching bar, 28...Was ball, 29...
Swivel shaft, 30... Pinion, 31... Rack cylinder, 32... Rack, 33... Swivel collar, 34... Swivel sleeve, 35... Rack sleeve, 36... Rack cylinder lid , 37...
- Diving cylinder, 38... Diving spring, 39... Diving bottle, 40... Positioning hole, 41... Sister pole, 42... Guide bushing, 43... Motor bracket, 44...・
Motor, 45...Ball screw, 46...Wespol screw hole, 47...Guide, 48...Motor bracket, 49...Motor 50...
Ball screw, 51..., screw hole, 52... guide,
53... Twin cylinder cylinder block, 54... Bed, 55. 56... Cylinder, 57... Sister pole, 58... Accommodation groove, 59... Wes pole, 60. 61... Piston, 62. 6
2', 63. 63'...Cylinder lid, 6
4... Oil supply sleeve, 65... Oil supply sleeve,
66...Position adjustment screw, 67...Bracket, 6
8...Position adjustment screw, 69...Cylinder positioning collar, 70-...Cylinder fixing nut, 71-
...Hollow position adjustment screw, 72...Bite holder 73
...Drill holder

Claims (2)

[Claims] (1) On the extension of the main shaft line in front of the guide bush,
A sub-headstock with a drive source controlled in synchronization with the rotation of the main shaft is mounted on a base capable of horizontal movement in the Y direction and swing rotation, and a turret is disposed on the side of the sub-headstock. A sub-spindle moving automatic lathe mechanism attached to a main-spindle moving automatic lathe. (2) As a tool rest, one of the two piston rods installed in the twin cylinder block of separate configuration is connected to the sister pole, which is the mounting base for the cutting tool and the drill, and the sister pole, which is the slide guide base for the said wespole. The cylinder block is fixed to the pole side so that the cylinder block can be moved to two extreme positions corresponding to the stroke of the piston rod with respect to the sister pole, and the other piston rod is fixed to the west pole side so that the west pole is connected to the cylinder block. The spindle movable automatic lathe according to claim 1, further comprising a wess pawl that can be moved to the ultimate position corresponding to the stroke of the piston rod, so that the wess pawl can be moved to four different positions with respect to the sister pawl. Automatic lathe mechanism with moving sub-spindle.