JPH0722843B2 - Turret for combined machining lathe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is for front-face machining in which a main shaft and a rear main shaft are provided so as to face each other, and a work is gripped by the main shaft and attached to a tool post via a tool holder. A multi-tasking lathe that performs front face machining with a tool, then grasps the work on the back spindle, and performs back face machining with a back face machining tool attached to the other tool holder mounting surface of the same tool post via the tool holder Regarding the turret.

[Prior Art] There are various types of multi-tasking lathes. Basically, the type in which a main shaft and a back main shaft are provided so as to face each other in order to perform back surface machining efficiently is basically the first type. The configuration is as shown in FIGS. 6 to 9. As shown in FIG. 6, the back spindle 4 of the back spindle 3 is disposed on the center line of the spindle 2 so as to face the spindle 2 of the head stock 1, and the back spindle 3 is located on the center line of the spindle 2. It is slidable in the parallel Z2 axis direction.
Further, a tool rest 6 for processing the work 5 gripped by the spindle 2.
Is provided so as to be slidable in the Z1 axis parallel to the center line of the main shaft 2 and in the X axis direction orthogonal to this, and the tool rest 6 has a front face machining tool holder 8A having a front face machining tool 7A. Back processing tool holder 8 with back processing tool 7A '...
A turret 9 having A '... attached thereto is rotatably supported for indexing.

The concrete structure of the turret 9 has a plurality of tool holder mounting surfaces 10 on the outer peripheral portion, as shown in FIG. 7, an example of which is shown in FIG. Individual positioning reference holes 10a and 10b are provided, and one of the positioning reference holes 10a is provided at a position corresponding to the rotary tool driving bevel gear 11. On both sides of the other positioning reference hole 10b, screw holes 10c, 10d, 10 for fixing the tool holder are provided.
e and 10f are formed. The rotary tool driving bevel gear 11 is fixed to a rotary shaft 12 which penetrates through the turret 9 and is rotationally driven by a motor (not shown), and the rotary shaft 12 is rotatably supported by the tool rest 6.

As shown in FIGS. 8 and 9, the tool holders 8A, 8B, 8C, 8A ', 8 mounted on the tool holder mounting surface 10 are shown.
B ', 8C' have positioning portions 8a, 8b fitted in the positioning reference holes 10a, 10b, and the screw holes 10c, 10d, 10
Insert the bolt 13 into the bolt insertion hole 8c formed on the corresponding part of e and 10f.
Has been inserted and fixed. Here, the tool holders 8A, 8B, 8C of FIG. 8 are front-end processing tool holders to which front-end processing tools 7A, 7B, 7C for processing the front side of the work 5 gripped by the spindle 2 are attached, The tool holders 8A ', 8B', and 8C 'shown in FIG.
Further, the rear surface spindle 4 is grasped, and the rear surface machining tools 7A ', 7B', 7 for rear surface machining of the workpiece 5 gripped by the rear main spindle 4 are carried out.
This is a backside tool holder to which C'is attached. Further, the tool holders 8A and 8A 'shown in FIGS. 8 (a) and 9 (a).
Is a bite holder for holding cutting bits 7A, 7A ', No. 8
The tool holders 8B and 8B 'in FIGS. 9B and 9B are drilling tool holders for holding drills 7B and 7B' for drilling by rotation of the spindle 2 or the back spindle 4, FIG. (C), the tool holders 8C and 8C 'in FIG. 9 (c) are those of the tool holders for rotary tools to which rotary tools 7C and 7C' that can be used by rotating the tool can be arranged on the center line of the spindle. One example is shown.

On the tool holders 8C and 8C 'for rotary tools,
A transmission shaft 15 provided at a right angle to the Z1 axis is rotatably supported, and bevel gears 16 and 17 are fixed to both ends of the transmission shaft 15, and one bevel gear 16 is the bevel gear for driving the rotary tool. Meshed with 11. In addition, the tool holders 8C and 8C '
A rotary shaft 18 is rotatably supported, and a chuck 19 for holding the rotary tools 7C and 7C 'is attached to one end of the rotary shaft 18. In the case of FIG. 8 (c), a gear 20 is fixed to the other end of the rotary shaft 18, and an intermediate shaft 21 arranged parallel to the rotary shaft 18 is rotatably supported. Reference numeral 21 denotes a bevel gear 22 that meshes with the bevel gear 17 and a gear that meshes with the gear 20.
23 is fixed. In the case of FIG. 9 (c), a bevel gear 24 is fixed to the other end of the rotary shaft 18, and the bevel gear 24 meshes with the bevel gear 17.

Therefore, when the rotary shaft 12 is rotationally driven, the rotation is transmitted to the bevel gear 17 via the rotary tool driving bevel gear 11, the bevel gear 16, and the transmission shaft 15. Then, in the case of FIG.
The rotation of the bevel gear 17 is controlled by the bevel gear 22, the intermediate shaft 21, the gear 23, and the gear 2.
0, transmitted to the chuck 19 via the rotary shaft 18, and the rotary tool 7
C rotates. In the case of FIG. 9 (c), the bevel gear 17
Is transmitted to the chuck 19 via the bevel gear 24 and the rotary shaft 18, and the rotary tool 7C 'rotates.

Incidentally, as one related to this type of combined machining lathe, there is, for example, JP-A-62-130102.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, the front and back tool holders 8A, 8B and 8C and the rear surface are restricted due to the restriction of the driving structure of the large and small positioning reference holes 10a and 10b and the rotary tools 7C and 7C '. Processing tool holder 8
The shapes are different from A ', 8B', and 8C ', and two types of tool holders, one for front machining and one for back machining, are required for each of the tool holder, the tool holder for drilling, and the tool holder for rotary tools. However, there was a problem that it was troublesome to manage and it was easy to make a mistake when installing.

An object of the present invention is to provide a tool post of a combined machining lathe that can use a common tool holder for front face machining and back face machining.

[Means for Solving the Problems] The above object is to provide a plurality of positioning reference holes having different diameters on the tool holder mounting surface of the tool rest, the positioning parts of the tool holder being fitted to the tool holder mounting surface. Is provided substantially in the center of the tool holder mounting surface, and the second reference hole and the screw hole into which the bolt for fixing the tool holder is screwed are formed at symmetrical positions with respect to the first reference hole. The same tool holder is used for the front processing tool and the back processing tool.
It is achieved by being configured so as to be rotated by 0 ° and mounted.

[Operation] The tool holder mounting surface of the tool post has a plurality of positioning reference holes having different diameters into which the positioning portions of the tool holder are fitted, and the first reference hole is provided substantially at the center of the tool holder mounting surface. The second reference hole and the screw hole into which the bolt for fixing the tool holder is screwed are formed at symmetrical positions with respect to the first reference hole. The tool holder for machining can be the same, and it can be mounted by rotating 180 degrees. That is,
Since the same tool holder can be used for both front and back machining, management is easy and it is possible to eliminate the waste of trying to remove the wrong tool holder when mounting. .

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. The same or corresponding members as those in FIGS. 6 to 9 will be designated by the same reference numerals in the following description. As shown in FIGS. 2 and 3, the tool holders 8A, 8B and 8C have the same structure as the conventional one and have positioning portions 8a and 8b. As shown in FIG. 1, a small-diameter positioning reference hole 10b is formed substantially in the center of the tool holder mounting surface 10 of the tool rest 6, and the tool holder is located on the spindle 2 side (see FIG. 6) from this position. A large positioning reference hole 10a into which the positioning portion 8a of 8A is fitted is formed. Further, a positioning reference hole 10a 'having the same hole diameter as the positioning reference hole 10a is formed at a symmetrical position of the positioning reference hole 10a with the positioning reference hole 10b as a center. On both sides of the positioning reference hole 10b, screw parts 10c, 10d, 10e, 10f
Are formed. Here, the screw parts 10c and 10f, 10d and 10e
Are formed at symmetrical positions with respect to the positioning reference hole 10b.

Therefore, as shown in FIG. 2, tool holders 8A, 8B, 8C
When the positioning portions 8a and 8b are fitted into the positioning reference holes 10a and 10b of the tool holder mounting surface 10 to be mounted, the front working tool holder is obtained. Also tool holders 8A, 8B,
Rotate 8C from the position shown in FIG. 2 by 180 ° and set the positioning parts 8a and 8b to the positioning reference holes 10 as shown in FIG.
When fitted to a'and 10b, it becomes a back surface processing tool holder. In this way, the tool holders 8A, 8B, 8C can be commonly used for front side processing and back side processing.

By the way, as shown in FIG. 2 (c) and FIG. 3 (c),
When the tool holder 8C for rotary tools is shared for front and back machining, only one bevel gear 11 for driving rotary tools is provided on the rotary shaft 12 in the past, so for back machining in the case of back machining. In order to transmit the rotation of the rotary shaft 12 to the rotary tool 7C ', a bevel gear 30 is fixed to the rotary shaft 12 so as to mesh with the bevel gear 16 in the case of FIG. 3 (c).

As shown in FIG. 1, the rotary shaft 12 has a gear 31 at its rear end.
Is fixed to the gear 31, and the gear fixed to the output shaft of the rotary tool driving motor 32 fixed to the tool rest 6 is fixed to the gear 31.
33 meshed.

FIG. 4 shows another embodiment of the present invention. In the embodiment, the positioning reference holes 10a and 10a ′ having a large hole diameter are provided symmetrically with respect to the positioning reference hole 10b having a small hole diameter, but the positioning reference hole 10a having a large hole diameter is provided as in the present embodiment. Positioning reference holes 10b, 10 with a small hole diameter at symmetrical positions as the center
b'may be provided. Also in this embodiment, screw holes 10c 'to 10f' are formed at symmetrical positions of the screw holes 10c to 10f with the positioning reference hole 10a as the center. With this structure, only one rotating tool driving bevel gear 11 is required, and the rotation transmission mechanism of the tool holder 8C can be simplified as shown in FIG.

In the above embodiment, the tool rest 6 is the turret 9.
Although the case where the turret 9 is provided is described, the same application can be made even if the turret 9 is not used.

[Effects of the Invention] As is clear from the above description, according to the present invention, it is possible to use a common tool holder for front surface processing and back surface processing, the number of types of tool holders is small, and management is easy. .

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (a) is a sectional view,
(B) is a plan view of the tool holder mounting surface, FIG. 2 (a)
(B) (c) and FIGS. 3 (a) (b) (c) are sectional views showing the mounting state of the tool holder in the case of FIG. 1, and FIG. 4 shows another embodiment of the present invention. (A) is a sectional view, (b)
Is a plan view of a tool holder mounting surface, FIG. 5 is a cross-sectional view when a rotary tool holder is mounted in the embodiment of FIG. 4, FIG. 6 is a plan view showing a schematic configuration of a combined machining lathe, and FIG. Shows a conventional example, (a) is a cross-sectional view, (b) is a plan view of a tool holder mounting surface, FIGS. 8 (a) (b) (c) and 9 (a) (b) (c) FIG. 8 is a sectional view showing a mounting state of the tool holder in the case of FIG. 7. 2: Spindle, 4: Rear spindle, 5: Workpiece, 6: Tool post, 7A, 7B, 7C: Front machining tool, 7A ′, 7B ′, 7C ′: Rear machining tool, 8A, 8B, 8C: Tool Holder, 8a, 8b: Positioning part, 10: Tool holder mounting surface, 10a, 10a ', 10b, 10b': Positioning reference hole, 10c to 10f, 10c 'to 10f': Screw hole, 11: Rotary tool driving umbrella Gears, 12: rotary shaft, 16, 17: bevel gear, 18: rotary shaft, 20: gear, 21: intermediate shaft, 22: bevel gear, 23: gear, 30: bevel gear.

Claims (3)

[Claims] 1. A main spindle and a back spindle are provided so as to face each other, a workpiece is gripped by the spindle and front machining is performed by a front machining tool attached to a tool post, and then the workpiece is grasped by the rear spindle to be the same. In a multi-tasking lathe that performs back machining with a back machining tool attached to the tool post, a plurality of positioning reference holes with different diameters are fitted to the tool holder mounting surface of the tool post. And a first reference hole is provided substantially in the center of the tool holder mounting surface, and a screw hole into which a bolt for fixing the second reference hole and the tool holder is screwed is centered on the first reference hole. A tool post of a multi-tasking lathe, characterized in that the front tool and the back tool are mounted in symmetrical positions, and the same tool holder is rotated by 180 degrees and attached. 2. The tool is a rotary tool that can be arranged on the center line of the spindle, and the tool holder has a conductive member and a train wheel that connects the conductive member and the rotary tool, and The conductive member is concentric with a first positioning portion that fits into a first reference hole provided substantially in the center of the tool holder mounting surface of the tool post, and the first member is provided on the tool post with the first positioning portion. The blade of a multi-tasking lathe according to claim 1, further comprising a conductive member that is connected to the conductive member that is concentric with the positioning portion and that drives the rotary tool through the conductive member. Stand. 3. The tool is a rotary tool that can be arranged on the center line of the spindle, and the tool holder has a conductive member and a train wheel that connects the conductive member and the rotary tool, and The conductive member is the same as a second positioning portion that fits with a second reference hole that is formed at a symmetrical position with respect to a first reference hole that is provided substantially in the center of the tool holder mounting surface of the tool post. A core, wherein the tool rest is provided with two conductive members that are connected to the conductive member provided concentrically with the second positioning portion and that drive the rotary tool via the conductive members. The tool post of the combined machining lathe according to claim 1, wherein the tool post is provided.