JPS58109203A - Twin turret rest of a lathe - Google Patents

Abstract

PURPOSE:To improve furning machining efficiency by pivoting a turret rest for outside diameter machining and a turret rest for inside diameter machining respectively on two adjacent sides of a cutter support body forming a right angle with each other. CONSTITUTION:A notch part 21 of the first turret rest 19r is facing the second turret rest 20 side and a workpiece is grasped by a chuck 9, then a main shaft 8 is rotated, and an outside diameter of the workpiece 10 is machined. Turn indexing of the turret rest 20 is performed, and a notch part 22 is positioned on the turret rest 19 side and clamped, then said rest 19 is subjected to turn indexing and required cutting along the outside diameter is performed. On the other hand, a notch part 21 is positioned on the turret rest 20 side and clamped, then, said rest 20 is subjected to turn indexing and required cutting along the inside diameter is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention improves the efficiency of turning in a numerically controlled lathe with respect to a twin turret tool post in which turret tool posts are attached to adjacent sides forming a right angle to one tool post support. In order to permanently set and multi-blade a tool, a tool in which two turret tool rests are attached to one support as shown in FIG. 1 has been known. That is, two turret tool rests, a first turret tool rest 3 to which an outer diameter cutting tool 2 is attached and a second turret tool rest 5 to which an inner diameter cutting tool 4 is attached, are pivotally supported on opposite sides of the support 1. It is something. However, this requires rotating and indexing the support 1 and positioning either of the two turret tool rests at the processing position during machining, which requires a rotation and indexing device for the support 1, and furthermore, The drawback was that it took time to complete the process, and the rigidity also deteriorated.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and aims to provide a turret tool rest having a short indexing time and a large number of tools. A turret tool post for external diameter machining and a turret tool post for internal diameter machining are pivoted on two adjacent sides, and tools are not mounted on each of the delicate tool mounting surfaces of the turret tool post. The turret turrets are characterized by having cutout portions to avoid mutual interference with other turret tool rests.

Embodiments of the present invention will be described below based on the drawings. A headstock 7 is fixed to the upper left surface of the ped 6, and a spindle 8 is supported horizontally. A chuck 9 is attached to the front end of the main shaft 8 and grips a workpiece 10.
In addition, a pulley 11 is attached to the rear end of the main shaft 8.
It is connected by a belt 14 to a pulley 13 attached to the output shaft of a main motor 12 attached to the left end of the ped 6. Two guide surfaces 15 are provided on the upper surface of the ped 6 in parallel with the spindle axis, and the carriage 16 is connected to the guide surfaces 15.
It is mounted so as to be slidable along 5. A horizontal guide surface 17 is provided on the upper surface of the reciprocating carriage 16 in a direction perpendicular to the spindle axis, and a turret support 18 that does not rotate and index is provided.
is placed slidably along this guide 1m17. On the side of the tool post support 18 facing the headstock, that is, the side perpendicular to the spindle axis, a first turret tool rest 19 holding a number of tools 2 for cutting outside diameter radially is mounted on a horizontal axis parallel to the spindle axis. It is mounted so that it can be rotated and indexed. Further, on the side surface on the workpiece side that is perpendicular to the side surface, that is, the side surface parallel to the spindle axis of the tool post support 18, there is a second turret tool post 20 that holds a number of internal cutting tools 4 radially.
is mounted so as to be pivotable and indexable about a horizontal axis perpendicular to the spindle axis. Both of these two turret tool rests 19 and 20 are provided with notches 21 and 22 at one location on the circumference where no tool can be attached, and the first turret tool rest 19 performs rotation indexing and cutting of the outer diameter. When the second turret tool rest 20 is performing rotation indexing, the notch 22 of the second turret tool rest 20 is placed in a clamped state by positioning the notch 22 toward the first turret tool rest 19 side. When cutting a borehole, the first turret tool rest 19 indexes and positions the notch 21 toward the second turret tool rest to be in a clamped state.The first turret tool rest 19 and the second tool rest 20 The structure is designed to prevent interference with the Of course, when two turret tool rests are assembled, the notch of at least one of the turret tool rests should be placed facing the other turret tool rest.

Next, the action will be explained. 1st turret tool rest 19
The notch 21 faces the second turret tool rest 20 side, the workpiece 10 is gripped by the chuck 9, the main shaft 8 is rotated, and the outer diameter of the workpiece 10 is first cut. The second turret tool rest 20 is rotated and indexed, the notch 22 is positioned and clamped on the first turret tool rest 19 side, and then the first turret tool rest 19 is rotated and indexed to set the required outer diameter. The cutting tool 2 is positioned at the processing position. When the indexing is completed, the carriage 16 and the tool post support 18 are moved to perform outer diameter cutting. If the next machining is inner diameter cutting, after completing the outer diameter cutting, the notch 21 is positioned and clamped on the second turret tool rest 20 side by rotation indexing of the first turret tool rest 19, and then the second turret tool rest 20 is rotated and indexed to position the required inner diameter cutting tool 4 at a machining position. Once the indexing is completed, the carriage 16 and the tool post support 18 are moved to perform inner diameter machining. In this embodiment, the tool post support is fixed so as not to rotate, but it is of course applicable to a support that can rotate.

As described in detail above, in the present invention, since the turret tool rests are attached to the right-angled adjacent sides of the tool rest support 18 so as to be rotatable and indexable, both turret tool rests can be mounted without having to rotate and index the support 1. This not only eliminates the need for a rotating and indexing mechanism for the support, but also eliminates the need for indexing the support, which improves machining efficiency by shortening the time rm. can do 0
In addition, because each of the two turret tool rests has a notch, even if two tool rests are installed relatively close to two adjacent right-angled surfaces, they will not interfere with each other, making it possible to hold a large number of tools. It has the feature of enabling rotating indexing and cutting of the let tool rest.

[Brief explanation of drawings]

111th! J is an explanatory diagram of the prior art. FIG. 2 is a front view of a lathe equipped with the turret tool post of the present invention. -ff view 5th
6 is a perspective view showing the outer diameter machining state of FIG. 3. FIG. 6 is a diagram showing the inner diameter machining state. 2... Tool for outer diameter cutting, 4... Tool for inner diameter cutting, 18... Turret support, 19... First turret tool rest, 20... Second turret tool rest, 21. 22-
...Notch, patent applicant concavity 8

Claims (1)

[Claims] (1) A tool rest support mounted movably or fixedly mounted on the bed and a plurality of tools for cutting outside diameter are mounted radially on the side surface of the tool rest support on the headstock side, parallel to the spindle line. The first turret tool rest, which is pivotably supported by a rotation axis such that it can be rotated, and the IUGR inner diameter cutting tool are radially mounted on the first turret tool rest mounting surface of the tool rest support. It is possible to swivel on the fine surface of adjacent workpieces at right angles to each other with a rotation axis perpendicular to the main spindle.A feature of each joint is that a notch is provided in the part that interferes with the mating tool rest to which no tools can be attached. A twin turret turret for a lathe.