JPS5932484Y2 - tool feeder - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tool feeding device 1% for feeding a tool mounted on a spindle in a direction perpendicular to the spindle.

For example, when performing diameter correction machining, groove machining, screw machining, back boring, etc. on the inner diameter surface using a milling machine or machining center, a tool attached to the main spindle of the machine tool must be fed in a direction perpendicular to the main spindle.

Such feed in the direction perpendicular to the main spindle is provided by a mechanism built into the tool holder with a tool holder interposed between the main spindle and the tool.

The purpose of this invention is to provide a tool feeding device that can automatically feed in the direction perpendicular to the axis using such a tool hoist radar by NC control, etc. The feed axis of the tool holder, which is configured so that the tool moves in a direction perpendicular to the main axis by rotating the feed axis that passes through the tool holder in a direction perpendicular to the axis, is controlled by a machine tool using, for example, an NC-controlled pulse motor. The tool feeder including the tool holder can be rotated from the side, and can be easily attached to and removed from a machine tool using a conventional automatic tool changer.

The following description will be made based on an embodiment shown in one drawing.

1 to 3 show an embodiment of a tool holder applied to the tool feeding device according to the invention, in which 1 is an outer cylinder, and 2 is rotatably fitted into the outer cylinder 1. The combined eccentric sleeve %3 is an eccentric sleeve that is rotatably fitted to the eccentric sleeve 2, and 4 is a tool mounting shaft that is rotatably fitted to the eccentric sleeve 3. A hole 6 for attaching a tool 5 is provided, and a shank 8 for attaching this tool holder to a main shaft 7 of a machine tool is integrally formed in the outer cylinder 1.

The eccentric sleeves 2 and 3 have the same amount of eccentricity, and meshing teeth 9, 10 such as crown gears are provided on one end surface of the eccentric sleeves 2 and 3.
is formed on the feed shaft 11 that passes through the outer cylinder 1 at right angles to the axis.

Gears 12, 13 meshing with these meshing teeth 9, 10 are fixed.

What is the mutual relationship between the sleeves 2 and 3 and the feed shaft 11?

It is shown in FIGS. 2 and 3, and FIG. 2 shows the outer cylinder 1.
The reference state is shown in which the center of the tool mount shaft 4 coincides with the center of the tool mounting shaft 4.

In this standard state, the eccentric sleeves 2 and 3 are installed with their eccentric directions perpendicular to the feed shaft 11 and opposite to each other, and from this state force, the sleeves 2 and 3
and rotate them by equal angles in opposite directions.
By rubbing, the tool mounting shaft 4 will move linearly along the axial direction of the feed shaft 11.

That is, the meshing relationship between the meshing teeth 9 and 10 and the gears 12 and 13 is such that when the feed shaft 11 is rotated, the sleeves 2 and 3 are rotated by the same angle in opposite directions. , when the sleeves 2 and 3 rotate, the meshing teeth 9
, 10 and the gears 12, 13, the meshing teeth 9 are arranged with the outer diameter of the sleeve 2 as a reference.
The meshing teeth 10 must be formed based on the inner diameter of the sleeve 3.

Figure 3 shows the situation when the tool mounting shaft 4 is moved to its end of movement by rotating the sleeve 2 90 degrees clockwise in the figure and the sleeve 3 90 degrees counterclockwise from the reference state in Figure 2. It indicates the condition.

In addition, 14.15 in FIG. 1 indicates the meshing teeth 9, 10 and the gear 12.
, 13, the rubber springs 16, 17, and 18 press the sleeves 2 and 3 toward the gears 12 and 13, respectively, in order to eliminate meshing backlash with the gears 12 and 13. Thrust metal inserted between.

19 is a set screw for fixing the tool 5, 20 is the feed shaft 1
The gear 21 is fixed to the outer cylinder 1, and the gear 21 is fixed to the outer cylinder 1.
The pinion is in mesh with 0.

The tool holder 22 configured as described above can move the tool 5 mounted on the tool mounting shaft 4 in a direction perpendicular to the main shaft 7 by rotating the feed shaft 11. can.

FIG. 4 shows means for rotating the feed shaft 11 of the tool holder 22 constructed in this manner by a swing drive device provided on the machine tool side.

In the figure, 23 is a sliding collar that is slidably but not relatively rotatably attached to the outer cylinder 1 of the tool holder 22, 24 is a rack that is fixed to the sliding collar 23 and meshes with the pinion 21, and 25 is a tool. A cylindrical member surrounding the holder 22, 26 is the tool holder 2
2 and the cylindrical member 25, 27 is a thread provided on the outer periphery of the cylindrical member 25, and 28 is the cylindrical member 25.
This knock pin 28 is provided in
The cylindrical member 25 is positioned by fitting into a positioning hole drilled in the spindle casing or spindle cover 29.

A rotating member 30 is loosely fitted into this cylindrical member 25 and is provided to engage with the thread 27.
0 and the sliding collar 23 are connected via a thrust bearing 31.

32 is a guide pin installed in the rotating member 30,
The guide pin 32 is shaped so as to be loosely fitted into a guide hole 34 provided in a ring-shaped swing drive table 33 mounted on the outer periphery of the spindle casing 29 of the machine tool.

Note that 35 is a pulse motor for rotating the swing drive table 33, and 36 is a bearing supporting the swing drive table 33.

37 is a guide groove provided in the outer cylinder 1 of the tool holder 22 parallel to the feed shaft 11, and 38 is a sliding member extending from the tool mounting shaft 4) and sliding in the guide groove 37.

In the above-mentioned configuration, when the rotation drive table 33 is rotated by the pulse motor 35, this rotation is transmitted to the rotation member 30 by the guide pin 32.
0 is moved in the axial direction (horizontal direction in FIG. 4) by the thread 27, and this axial movement is caused by the thrust bearing 31. Sliding collar 23
is transmitted to the rack 24 via the pinion 21. gear 2
0, the feed shaft 11 rotates, and the tool 5 moves in a direction perpendicular to the paper plane of FIG.

The rotating member 30 is connected to the sliding collar 23 via a thrust bearing 31, and is screwed into and moves along a cylindrical member 25 that is fixed to the main shaft casing or main shaft cover 29. Therefore, the tool 5 can be moved even during rotation of the :EE axis.

Further, the cylindrical member 25 and the rotating member 30 are respectively connected to the spindle casing or spindle cover 29 and the rotating drive table 33 by the dowel pin 28 and the guide pin 32 parallel to the spindle 7, so that the tool including the tool holder 22 The feed device can be easily attached to and detached from the machine tool, and can be attached and detached using a commonly used automatic tool changer.

In addition. Conventionally, tool holders that can move the tool in a direction perpendicular to the main axis have a structure in which a feed shaft that passes through the tool holder perpendicular to the axis and a tool mounting member are screwed together, and the tool is moved by screw feeding. is better known,
It is also possible to configure the present invention using such a tool holder.

As described above, the tool feeding device according to this invention is.

The tool can be moved in a direction perpendicular to the spindle using NC control while the spindle is rotating, and it is extremely easy to change tools including this feed device, making it possible to automate tool changes and various types of internal machining. This has the effect of being easily achievable.

[Brief explanation of the drawing]

The figures show one embodiment of this invention, in which Fig. 1 is a cross-sectional view of the tool holder, Figs. 2 and 3 are cross-sectional views of the tool holder, and Fig. 4 is a feed of the tool holder. FIG. 3 is a cross-sectional diagram showing a mechanism for rotating a shaft. In the figure, 1 is an outer cylinder, 2 and 3 are eccentric sleeves, 4 is a tool mounting shaft, 5 is a tool, 7 is a main shaft, s, io are meshing teeth %11 is a feed shaft, 12.13 is a gear, 20 is a gear , 21 is a pinion, 22 is a tool holder, 23 is a sliding collar, 24 is a rack %2
5 is a cylindrical member; 27 is a thread; 28 is a dowel pin; 29 is a main shaft casing or main shaft cover; 30 is a rotating member; 31
32 is a thrust bearing, 32 is a guide pin, 33 is a swing drive tape I, 34 is a guide hole, and 35 is a pulse motor.

Claims (1)

[Scope of utility model registration request] This sliding movement is achieved by providing a sliding flange on the outer cylinder of the tool holder that is configured to move the tool in a direction perpendicular to the main axis by rotating a feed shaft that passes through the tool holder at right angles to the axis. A rack fixed to the collar and a pinion fixed to the feed shaft are connected by meshing, and a cylindrical member surrounding the tool holder and a rotating member engaged with the cylindrical member via a thread are provided. The rotating member and the sliding collar are connected via a thrust bearing, the tool holder is connected to the main shaft of the machine tool, the cylindrical member is connected to the main shaft casing or the main shaft cover of the machine tool, and the rotating member is connected to the main shaft of the machine tool. A tool feeding device characterized in that each tool is engaged with a ring-shaped swing drive device attached to the outer periphery of a spindle casing.