JPH0680506U - Rotating tool holder for lathe - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a universal rotary tool holder that can handle outer circumferences, end faces, oblique hole machining, and front and back machining with one piece. [Structure] A holder main body 18 detachably attached to a turret 15 is provided with a turning center shaft 25 perpendicular to an input shaft 19.
A movable body 25 integrally having a and 25b is supported so as to be capable of swivel indexing, a plurality of arcuate elongated holes are provided on the side plate 18B concentrically with the swivel center, and four are engraved at positions corresponding to the elongated holes of the movable body The two clamping bolts 30 are selectively screwed into the screw holes 25d of 4 to be tightened, and the movable body is fixed to the holder main body so that the rotary tool shaft 26 is at least 180 ° in the X / Z axis plane. Index to any angle within.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary tool holder for a composite lathe, and more particularly to a universal rotary tool holder.

[0002]

[Prior art]

 Conventionally, tool holders for compound lathes require holders for fixed tools such as various tools, as well as holders for rotary tools such as end mills and drills. These rotary tool holders are for outer circumference machining, end face machining, diagonal hole machining, etc. I was preparing a special holder. FIG. 5 shows an example of a rotary tool holder for end face machining. One of the rotary tool mounting stations provided on the outer periphery of the turret 101 is a rotary tool holder 104 having a rotary tool shaft 103 perpendicular to the input shaft 102. The rotary tool shaft 103 is detachably mounted with the main shaft side facing in the Z-axis direction.

[0003]

[Problems to be solved by the device]

 The method of preparing various dedicated tool holders described in the conventional technique has a problem that the tool cost increases due to an increase in the kinds of tool holders and the storage management cost also increases. If a lathe with sub-spindle, such as a lathe with simultaneous front and back machining, requires a tool holder for back machining, the above-mentioned problems will increase. The present invention has been made in view of the above problems of the prior art. The purpose of the present invention is to perform outer peripheral processing, end surface processing, oblique processing and front / back processing with one type of rotary tool holder. The aim is to provide a universal rotary tool holder that can achieve

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, a rotary tool holder for a lathe according to the present invention is a rotary tool holder for a lathe in which a rotary tool driving means is incorporated in a tool rest, and the tool mounting position of the tool rest or swivel indexing is possible. A holder main body that is fixedly and detachably attached to a tool mounting position of a turret and that supports an input shaft that is rotated by the rotary tool driving means, and a rotary tool shaft that is provided on the holder main body and that is rotated by the input shaft. The rotary tool shaft comprises a movable body which can be swivel-indexed at an arbitrary angle of at least 180 ° in the X-Z axis plane, and a means for clamping the movable body to the index position with respect to the holder main body. It is a thing. Further, the movable body can be pivotally indexed at an arbitrary angle of at least 180 ° in the Z / Y axis plane so that the rotary tool axis can be inverted in both directions in the Z axis direction. Further, a cutting fluid nozzle facing the tip side of the rotary tool shaft may be provided on the movable body so that the movable body can be swung.

[0005]

[Action]

 In the rotary tool holder according to the first aspect of the present invention, the clamp bolt is removed, the movable body is indexed so that the rotary tool shaft is concentric with the input shaft, and the clamp bolt is tightened again for outer peripheral machining. Similarly, if the movable body is indexed so that the rotary tool axis faces the left side in the Z-axis, it will be for machining the front end face of the workpiece gripped by the left spindle chuck, and if it is indexed at any intermediate angle, it will be a diagonal hole machining on the workpiece front side. Be useful. When the movable body is indexed so that the rotary tool axis faces the right side in the Z-axis, it is for machining the back end face of the work gripped by the right facing spindle chuck, and when indexed at any intermediate angle, the back surface of the work is slanted. It is for hole processing.

In the rotary tool holder of claim 2, like the rotary tool holder of claim 1, the clamp bolt is removed, the movable body is indexed so that the rotary tool shaft faces the right side in the Z-axis, and the clamp bolt is tightened. Therefore, it becomes for the end face processing on the front side of the work, and similarly, when the movable body is indexed to the left side, it becomes for the back side end face processing. Also, if it is directed upward or downward, it will be for machining in the Y-axis direction, and for oblique hole machining at any intermediate angle. Moreover, it is not necessary to adjust the cutting fluid nozzle by swiveling and indexing the movable body.

[0007]

First Embodiment A first embodiment will be described with reference to FIGS. In the opposed spindle lathe shown in FIG. 1, two sets of Z-axis guides 1a and 1b are provided on the bed 1, and the first spindle stock 2 and the second spindle stock 3 have the spindle center line on the Z-axis guide 1a. The first spindle headstock 2 and the second spindle headstock 3 are movably positioned by a servo motor 4 and a movable head, respectively. The first headstock 2 has a first spindle, and the second headstock has a second spindle rotatably supported so as to face each other. A first chuck 6 is provided at the tip of the first spindle, and a second chuck of the second spindle. The second chuck 7 is fitted to each of the tips.

Further, a saddle 8 is movably mounted on the Z-axis guide 1b of the bed 1, and the saddle 8 is moved and positioned by a servo motor 9. A guide 8a in the X-axis direction is provided on the saddle 8, a first tool rest 11 is movably mounted on the X-axis guide 8a, and the first tool rest 11 is moved and positioned by a servomotor 10. To be done. A first turret 12 is provided on the first turret 11 so as to be capable of swivel indexing around a swivel center axis in the Z-axis direction, and a plurality of tools for fixed tools and rotary tools are provided on the outer circumference of the first turret 12. A mounting station is provided.

On the other hand, a movable table 13 is provided on the rear surface of the bed 1 so as to be movable and positioned in the Y-axis direction, and a second tool rest 14 is provided on an X-axis guide 13 a provided on the upper surface of the movable table 13. The second turret 14 is movably mounted and the moving position of the second turret 14 is determined by a servomotor 17. The second turret 14 is provided with a second turret 15 which can be swivel-indexed around a swivel center axis in the Z-axis direction, and a plurality of tool attachments for fixed tools and rotary tools are attached to the outer circumference of the second turret 15. A station is provided.

2 and 3 show a rotary tool holder detachably attached to the rotary tool tool mounting station of the first turret 12 or the second turret 15. The holder main body 18 of the rotary tool holder is composed of a shank 18A and two side plates 18B. An input shaft 19 is rotatably supported on the shank 18A. The input shaft 19 has a bevel gear 21 integrally formed at the front end thereof, and is engaged with a clutch at the rear end of the rotary tool driving means with built-in tool rests 12 and 15 at the rear end. A clutch 22 that is detachably engaged is fitted. The side plates 18B of the holder body 18 are fixed to the upper and lower surfaces of the shank 18A, and the bevel gear with shaft 24 is pivotally supported on the lower side plate 18B through a plurality of bearings at a right angle to the input shaft 19. The bevel gear 24 is meshed with the bevel gear 21.

A rotary tool shaft 26 is rotatably supported on the movable body 25, and the movable body 25 has pivot center axes 25 a and 26 b perpendicular to the rotary tool shaft 26. The shaft 25b is supported in the center hole of the bevel gear with shaft 24, and the other turning center shaft 25a is supported in the concentric hole of the upper side plate 18B so as to be capable of turning in the X-Z plane by means of a plurality of bearings. There is. Further, the side plate 18B is provided with a plurality of arc-shaped elongated holes 18a, which are concentric with the turning center axis 25a, at equal pitches, and four screw holes 25d are formed at positions corresponding to the elongated holes of the movable body 25. There is. Then, the two mounting bolts 30 are selectively screwed into the four screw holes 25d and the clamp bolts 30 are tightened, so that the rotation tool shaft 26 moves from the Z-axis first spindle headstock 2 side to the first side. 2 Positioning is possible at an arbitrary angle of at least 180 ° up to the headstock 3 side. A bevel gear 27 that meshes with the bevel gear 24 is fitted on the rotary tool shaft 25, and a rotary tool T is detachably attached to the tapered tip end via a collet bush 28.

The first turret 12 and the second turret 15 are provided with a cutting fluid joint 29 supplied from a cutting fluid device (not shown) through the turret rotation center in the vicinity of the tool mounting station. It is adapted to communicate with the flow path 18b formed in the holder body 18 when mounted. The flow path 18b is in communication with the cutting fluid nozzle 31 attached to the tip of the flow path 25c of the movable body 25 via the flow path 18c of the side plate 18B. Therefore, since the cutting fluid nozzle 31 is swung together with the movable body 25, the cutting fluid is constantly ejected toward the cutting edge position of the rotary tool T. The cutting liquid nozzle 31 has a discharge direction that can be freely changed.

Next, the operation of the first embodiment will be described. When changing the rotary tool holder from the outer peripheral machining shown by the solid line in FIG. 2 to the end face machining corresponding to the first headstock 2, the clamp bolt 30 is removed, the movable body 25 is rotated clockwise by 90 °, and The zero mark on the movable body side is aligned with a positioning means (not shown), for example, the 0 degree position on the scale, and the clamp bolt 30 is screwed into the corresponding screw hole 25d again. When changing to the end face machining corresponding to the second headstock 3, similarly, the clamp bolt 30 is removed, the movable body 25 is rotated counterclockwise to align the zero mark with the position of 180 ° on the scale, and again. Tighten the mounting bolt into the corresponding screw hole.

In the case of oblique hole machining, the specified angle is between 0 ° and 90 ° on the scale when the first headstock 2 is supported, and between 90 ° and 180 ° on the scale when the second headstock 3 is supported. Align the zero marks of the movable body 25 to the specified angles and clamp with the mounting bolts 30. For example, when the rotary tool holder of the second tool post 14 is used for oblique hole machining, the X-axis feed of the second tool post 14 and the Z-axis feed of the first headstock 2 or the second headstock 3 are synchronized. Controlled to perform oblique hole drilling on the outer circumference or end face of the work.

Next, a second embodiment will be described with reference to FIG. The description of the same parts as those in the first embodiment will be omitted to avoid duplication. An input shaft 52 is rotatably supported by a holder main body 51 of the rotary tool holder. The input shaft 52 has a bevel gear 53 integrally formed at its tip end, and a clutch 54 is fitted at its rear end. A movable body 55 is provided in the holder body 51 so as to be rotatable around the input shaft axis, and a rotary tool shaft 56 is supported by the movable body 55 at right angles to the center of rotation. A bevel gear 57, which meshes with the bevel gear 53, is fitted on the rotary tool shaft 56, and the rotary tool T is detachably attached to the tapered hole at the tip through a collet 58.

The movable body 55 is provided with a plurality of arc-shaped elongated holes (not shown) concentric with the center of rotation, and a plurality of clamp bolts 59 penetrating the elongated holes rotate the input shaft 52, that is, Z. -It is possible to perform indexing by swiveling at an angle of at least 180 ° in the plane of the Y-axis, and the rotary tool shaft 56 is not limited to the first headstock 2 side or the second headstock 3 side in the Z-axis direction and any intermediate position therebetween. It is designed to face the angle direction. Therefore, when the movable body 55 is clamped on the holder main body 51 so that the rotary tool shaft 56 faces the first headstock 2 side, it becomes for end face machining corresponding to the first headstock, and faces the second headstock 3 side. When the movable body 55 is clamped to the holder main body 51, the end face is processed for the second headstock. When mounted on the second turret 15 and clamped downwards or upwards in the Y-axis direction, it is for Y-axis machining due to the Y-axis feed of the moving base 13, and when clamped so as to face an intermediate angle, The Z-axis feed of the 1 headstock 2 or the 2nd headstock 3 and the Y-axis feed of the moving base 13 are combined to be used for oblique hole machining.

[0017]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. In the rotary tool holder for lathe according to claim 1, the movable body can be rotated at least 180 ° on the plane parallel to the X and Z axes and can be indexed at an arbitrary angle. It enables edge processing, oblique hole processing and front and back processing. Further, in the rotary tool holder for a lathe according to claim 2, since the movable body can be inverted by 180 ° in the plane parallel to the Z and Y axes, the end face can be machined on both sides by using one type of tool holder, and the Y axis function can be obtained. If it is attached to a turret having, it is possible to perform Y-axis machining and diagonal hole machining. This reduces the number of tool holders, simplifies selection, reduces direct costs for preparing tool holders, and reduces indirect costs such as maintenance. Also, since the degree of freedom of the turning angle is high, there is no restriction on processing and the processing ability can be fully exhibited.

[Brief description of drawings]

FIG. 1 is a perspective view of an opposed twin-spindle lathe equipped with a rotary tool holder according to a first embodiment.

FIG. 2 is a front view of the rotary tool holder according to the first embodiment.

3A is a side view of FIG. 2, and FIG. 3B is a side view of FIG.

FIG. 4 is a front view of a rotary tool holder according to a second embodiment.

FIG. 5 is a front view of a conventional rotary tool holder dedicated to end face machining.

[Explanation of symbols]

12,15 Turret 18,51
Holder body 18A Shank 18B Side plate 18a Arc-shaped oblong hole 19,52
Input shaft 25,55 Movable body 26,56
Rotary tool shaft 30,59 Clamp bolt 31 Cutting fluid nozzle T Rotary tool

Claims (3)

[Scope of utility model registration request] 1. A rotary tool holder for a lathe in which a rotary tool driving means is incorporated in a tool rest, the tool holder being detachably mounted at a tool mounting position of the tool rest or a tool mounting position of a turret capable of turning and indexing. A holder main body that supports an input shaft that is rotated by a rotary tool driving means, and a rotary tool shaft that is provided on the holder main body and that is rotated by the input shaft, and that the rotary tool shaft is at least 180 in the X-Z plane. °
A rotary tool holder for a lathe, comprising: a movable body that can be swivel-indexed at an arbitrary angle; and means for clamping the movable body at an indexing position with respect to the holder body. 2. The movable body can be pivotally indexed at an arbitrary angle of at least 180 ° in the plane of the Z / Y axis so that the rotary tool axis can be inverted in both directions in the Z axis direction. The rotary tool holder for the lathe described. 3. A rotary tool for lathe according to claim 1 or 2, wherein a cutting fluid nozzle facing the tip end of the rotary tool shaft is provided on the movable body so as to respond to the turning of the movable body. holder.