JPS649121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to an improvement of a tool post for a multi-tasking lathe.

Conventional technology The tool rest of a normal NC lathe often has a separate turret tool rest for turning tools and a turret tool rest for rotary tools, and the turret rests are placed in a standby position to avoid interference with the chuck, tailstock, or each tool rest. are doing. For this reason, when a command for outer diameter, inner diameter or hole drilling is issued, the stroke for selecting a tool and positioning the tool in the processing device becomes long, resulting in an unexpectedly large amount of idle time. Furthermore, when a large number of tools are mounted on one tool post, the chuck, tailstock, and tool post tend to interfere with each other, making it difficult to arrange and control the tools to avoid this.

Purpose: Therefore, the present invention has been made in view of the above, and has little interference with each part, and is also suitable for use in the main axis direction (Z) of the tool rest.
The present invention aims to provide an indexing tool rest that requires less stroke in the cutting direction (X-axis).

Solution: In a square indexing tool rest that is mounted so as to be movable in parallel and perpendicular directions to the spindle axis of a compound machining lathe and rotated about an axis perpendicular to the two directions, one of the four sides A rotary tool attachment part with a tapered shank having axes perpendicular to the turret pivot axis and parallel to each other is provided at two positions sandwiching the center of the turret pivot shaft, and the center of the pivot shaft is mounted on two adjacent sides of the turret pivot shaft. at right angles to the pivot axis on the opposite side of the rotary tool,
In addition, one turning tool mounting portion with a tapered shank having coaxial or parallel axes is provided, and the tool rest is further provided with a rotary tool driving means.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. In a known multi-tasking lathe, a main spindle 2 is rotatably and indexably supported on a headstock 1 on a bed (not shown), and a workpiece W is gripped by a chuck 3 fitted on the end of the main spindle. There is also a headstock 1 on the bed.
A tailstock 6 having a tailstock shaft 5 on which a center 4 is fitted is placed opposite to the tailstock 6 . Furthermore, the carriage 7 placed on the Z-axis direction guide surface on the bed is not shown.
Positioning is controlled by a feed screw from an NC-controlled servo motor. A transverse feed table 8 is mounted on the reciprocating table 7 so as to be slidable in the X-axis direction, and its position is controlled by a feed screw from an NC-controlled servo motor (not shown). A square tool rest 9 that can be rotated and indexed is provided on the cross feed table 8, and a rotating shaft 10 having axes perpendicular to each of the X and Z axes is provided.
The four corner sides 9a, 9b, 9c, 9d
is indexed parallel to the Z axis. The side surface 9a of this square indexing tool rest 9 is provided with rotary tool mounting portions A and B with tapered shank whose axes are perpendicular to the rotation axis and parallel to each other at two positions symmetrical with respect to the rotation axis 10. The tool is conveyed from the magazine to the receiving hole of the taper shank by an exchange arm (not shown). Rotation is transmitted to the rotary tool mounting portions A and B from a separate motor (or on the tool rest) via gears (not shown) built into the tool rest 9, respectively. Normally, the rotary tool attachment part A is equipped with a tool T1 for machining the outer periphery of the workpiece, such as an end mill, and the rotary tool attachment part B is equipped with a tool T2 for machining the end surface of the workpiece, such as a drill. Also, the left side (first side) adjacent to side 9a
Figure) On the right side 9b and 9c, a turning tool with a taper shank with an axis perpendicular to the rotation axis and on the same axis or parallel to the rotation axis is mounted on the opposite side of the rotary tool attachment parts A and B with respect to the rotation axis. Sections C and D are provided,
Each has a tapered shank receiving hole. Normally, the outer diameter turning tool T3 is attached to the attachment portion C, and the inner diameter cutting tool T4 is attached to the attachment portion D, respectively. Note that a tool attachment portion is not necessarily provided on the side surface 9c.

In each of the tool rests configured in this way, a tool changing device is installed at the tool mounting part.The mounting part A has an end mill T1 for key machining, the mounting part B has a drill T2 for drilling, and the mounting part C has an outer diameter Cutting tool T3,
Mounting part D has a boring or internal cutting tool T4
is installed and controlled by NC. In the machining sequence, for example, as shown in FIG. 2, the side surface 9b of the tool post 9 is indexed in the Z-axis direction, and the outer periphery of the workpiece W is cut with the tool T3. Also, cutting of the end face is performed. Next, as shown in FIG. 3, the side surface 9a of the tool rest 9 is indexed parallel to the Z-axis, the main shaft is indexed to the C-axis, and a flat portion or key groove is cut on the outer periphery using the tool T1. Next, as shown in FIG. 4, the side surface 9a of the tool rest 9 is indexed parallel to the X-axis, and a hole is drilled in the end surface of the workpiece W using the tool T2. Next, as shown in FIG. 5, the side surface 9d of the tool rest 9 is indexed parallel to the X axis, and the inner diameter of the workpiece W is cut and bored using the tool T4. The processing order is not limited to this.

Effects As detailed above, the present invention has a four-cornered indexing tool rest with one outside diameter tool and one inside diameter tool on both sides with respect to the center of rotation, and a rotary tool on the other side of the tool rest. Since it is installed in two positions symmetrical to a line that passes through the center of the rotation axis and is parallel to the side surfaces 9c and 9d, the tool rest can be rotated even when changing the cutting area or cutting content, resulting in slight X and Z changes. By simply moving the axis, the tool can be positioned at the machining position in an extremely short time, reducing idle time and enabling efficient machining. In addition, since the tools are arranged on one turret with consideration to the machining direction, there is less interference with the chuck, tailstock, lower turret, etc., making operations and programming easier.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of tool arrangement, Fig. 2, Fig. 3,
FIG. 4 and FIG. 5 are diagrams showing the machining status of each tool. 1... Headstock, 6... Tailstock, 9... Turret post,
10...Turret pivot axis, 9a, 9b, 9c, 9d
...Turret side, A, B...Rotary tool mounting part,
C, D...Turning tool attachment part.

Claims (1)

[Claims] 1. In a square indexing tool rest that is mounted so as to be movable in parallel and perpendicular directions to the main spindle axis of a compound machining lathe, and that is rotated and indexed by an axis perpendicular to the two directions, one of the four sides A rotary tool mounting portion with a tapered shank having axes perpendicular to the turret pivot axis and parallel to each other is provided at two positions sandwiching the center of the turret pivot axis on a side surface, and a rotary tool mounting portion with a tapered shank having axes that are perpendicular to the pivot axis and parallel to each other is provided at two positions sandwiching the center of the turret pivot axis, and a rotary tool mounting portion with a tapered shank is provided at two positions sandwiching the center of the turret pivot axis. 1, each having an axis that is perpendicular to the rotation axis on the opposite side of the rotating tool and that is on the same axis or parallel to the rotating tool.
An indexing tool post for complex machining, characterized in that a turning tool mounting portion with a taper shank is provided, and the tool post is further provided with a rotary tool drive means.