JPH10244434A - Flexible reference tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible reference tool which can position the reference angle of an axial article work in the various kinds of shapes, is provided with a revolving reference seating different in axial/revolving directions, and has a simple and inexpensive reference tool not restricting any space capable of processing the axial article work by a processing spindle and a tool. SOLUTION: This flexible reference tool is provided with a three-axis NC processing machine 20, a tool changing device 10, a reference tool 9 which is so designed as to be automatically exchanged by the tool exchanging device 10 between a spindle 7 and the housing position of a tool 13 in a tool housing part 12, and with a dividing device 4 which is rotatably connected with a tail stock device 2 supporting an axial article work at its one end, and a chuck device 3 gripping the aforesaid work at the other end, and the reference tool 9 is mounted to the spindle 7 of the three axes NC processing machine 20 so as to be capable of being positioned automatically in place, and a reference angle is so designed as to be positioned by letting the tip end face of the reference tool be pressed onto the revolving reference seating 5 of the axial article work rotated by the dividing device 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible reference tool having a reference tool which can determine a reference angle of a workpiece having a gripping shaft such as a crankshaft.

[0002]

2. Description of the Related Art When machining a shaft work such as a crankshaft, it is necessary to position the axis of the shaft work, the axial direction, and the rotational direction. Many proposals have been made, such as Japanese Patent Publication No. 62-47140. For example, as shown in FIG. 4, the shaft workpiece 1 is gripped at one end by the tailstock device 2 and the other end is gripped by the chuck device 3 to perform positioning of the shaft core and the axial direction, and thereafter, the indexing device connected to the chuck device 3 4 is rotated together with the work 1, the rotation reference seat 5 prepared for the work 1 is pressed against the rotation reference 6, the index angle is used as the rotation reference, and then the work is indexed to a desired angle and gripped and fixed by the chuck device 3. Then, the processing was done. Reference numeral 61 denotes an arm for supporting the rotation reference 6, which can be retracted around the pin 62 to the dotted line position 6 'in FIG.
When machining shaft workpieces of various shapes, the axial center and axial positioning can be handled by increasing the strokes of the tailstock device and chuck device, but a reference tool that can determine the reference angle of the workpiece As a device, as shown in FIG. 3, for positioning in the rotation direction,
Rotation reference seat 5 prepared for shaft workpieces 1a, 1b
Since a and 5b are different in the axial direction and the rotation direction, it is necessary to move the rotation reference 6 for positioning the rotation direction in the axial direction and the rotation direction. This moving mechanism becomes very complicated and expensive, and the rotation reference 6 and its moving mechanism are disposed at positions where the spindle 6 and the tool 8 are interrupted with respect to the shaft workpiece 1, so that the space that can be processed is limited. There was a problem to be done.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the conventional product and to freely determine a reference angle of a shaft work such as a crankshaft, and to provide a different rotation reference seat in an axial direction and a rotational direction. An object of the present invention is to provide a flexible reference tool having a reference tool which can cope with various types of shaft workpieces having the above, and which is simple, inexpensive, and does not limit the space that can be machined by the machining spindle and the tool on the shaft workpiece.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a so-called three-axis NC machine capable of positioning a three-dimensional space by a program and performing machining with a spindle axis capable of automatically changing tools, and a so-called NC machine for the tool. A tool exchange device that performs automatic exchange, a reference tool that can be automatically exchanged between the spindle shaft and the tool storage position of the tool storage unit by the tool exchange device, and an axial core and axial positioning of a shaft work, The reference tool, comprising a tailstock device provided on a table of a three-axis NC processing machine for supporting a shaft workpiece at one end, and an indexing device rotatably connected to a chuck device for gripping at the other end; Selects an NC program input in advance corresponding to the axis work, and is mounted on the spindle axis of the 3-axis NC machine to automatically perform a predetermined operation. The reference tool tip surface is pressed against the rotation reference seat of the shaft workpiece that is positioned at the position and rotated by the indexing device, and the rotation angle at that time is positioned to be determined as the reference angle of the shaft workpiece. The above-mentioned problem of the prior art was solved by providing a flexible reference tool.

Preferably, the reference tool has an air outlet opening at the tip end face thereof, supplies air from the spindle shaft side, and the rotating reference seat of the shaft work is brought into close contact with the air outlet opening at the reference tool tip face. By blocking
The reliability may be improved by detecting the air pressure and confirming the close contact of the tip surface of the reference tool. More preferably, the reference tool has a two-sided restraint holder, and may have improved rigidity and accuracy.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to FIGS. FIG. 1 is a schematic perspective view of a flexible reference tool showing the configuration of an embodiment of the present invention, and FIG. 2 (a) is a dotted line in FIG. 1 showing a state in which a tip end face of a reference tool is pressed against a rotation reference seat of a shaft workpiece. And (b) is a partially enlarged side view showing a state in which a reference tool provided with an air outlet opening at the tip surface of the reference tool is pressed against a rotation reference seat of a shaft workpiece. The flexible reference tool according to the embodiment of the present invention
Dimension space can be positioned by program and tool 9,
It is used for a so-called three-axis NC machine 20 that performs machining with the spindle shaft 7 that can automatically change 13. 3 axis N
The column 23 of the C processing machine 20 is mounted on a column base unit 22 fixed to the base 21 so as to be movable in the X and Y directions, and the spindle 7 can be moved in the vertical Z direction via a slide unit 24 and a spindle unit 25. The spindle 7 is supported by a column 23 so that a three-dimensional space can be positioned by a program.

The tool changer 10 is adapted to automatically change a tool attached to the tip of the spindle 7 between a position where the tool 13 is stored in the tool storage 12 and a tool which functions as a conventional rotation reference in the present invention. The tool 9 can be automatically exchanged between the spindle 7 and the tool 13 in the tool storage section 12 by the tool exchanging device 10. In the embodiment of the present invention, the shaft center of the shaft workpiece 1 is based on the chuck.
1c and a tailstock 2 for supporting the axial workpiece 1 at one end on a table 27 rotatably supported by a revolving table 26 attached to a base 21 of the three-axis NC machine 20 so as to perform axial positioning. An indexing device 4 rotatably connected to a chuck device 3 held at the other end is provided. The reference tool 9 is mounted on the spindle shaft 7 of the three-axis NC machine 20 and can select an NC program (not shown) input in advance corresponding to the axis workpiece 1 and automatically position it at a predetermined position. The reference tool tip surface 9c is pressed against the rotation reference seat 5 of the rotated shaft workpiece 1,
The rotation angle at that time is positioned and determined as a reference angle of the shaft workpiece.

Thereafter, the reference tool 9 is separated from the shaft workpiece 1 and stored in the tool storage unit 12 from the spindle shaft 7 by the tool changing device 10, and the tool 13 in the tool storage unit 12 to which the processing tool of the tool storage unit 12 is mounted. Is mounted on a spindle shaft 7, the shaft workpiece 1 is rotated from a reference angle by an indexing device 4 and fixedly held by a chuck device 3 to perform desired processing. For this reason, a flexible reference tool having a reference tool that does not limit the space that can be machined by the machining spindle and the tool with respect to the shaft workpiece has been provided. As described above, it is possible to prepare a rotation reference at a required position by simply switching programs for any type of shaft workpiece having a different rotation reference seat in the axial direction and the rotation direction. In addition, in the processing of the shaft workpiece 1, while the positioning of the shaft core 1c and the axial direction of the shaft workpiece 1 is being performed, the three-axis NC processing machine 20 is in a standby state. Since the tool 13 of the spindle shaft 7 can be exchanged, the time loss in which the reference tool 9 is exchanged between the spindle shaft 7 and the tool storage section 12 by the tool exchanging device 10 is very small.

As shown in FIG. 2 (b), the preferred embodiment of the flexible reference tool has an air outlet 91 which is opened at the tip surface 9c of the reference tool. Air is supplied through the communicating air supply path 71, and the rotation reference seat 5 of the shaft workpiece 1 is brought into close contact with the air outlet 91 opening in the reference tool tip surface 9c to block the air pressure. The reliability of the rotation angle positioning accuracy may be improved by detecting the contact and confirming the close contact of the reference tool tip surface. Further preferred embodiment In the flexible reference tool, the reference tool 9 may have a so-called two-sided restraint holder (not shown) to improve rigidity and accuracy. Further, the reference tool tip surface 9c may not be perpendicular to the tool axis.

[0010]

As described above, according to the present invention,
The reference angle of a shaft work such as a crankshaft can be determined, it can correspond to various shapes of shaft work having different rotation reference seats in the axial direction and the rotation direction, can be stored in the tool storage part, and can be automatically changed by the tool changer Therefore, a flexible reference tool having a reference tool which is simple and inexpensive and does not limit the space that can be machined by the machining spindle and the tool on the shaft workpiece is provided.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a flexible reference tool showing a configuration of an embodiment of the present invention.

2A is a partially enlarged side view of a portion indicated by a dotted line in FIG. 1 showing a state in which a reference tool tip surface is pressed against a rotation reference seat of a shaft workpiece, and FIG. 2B is an opening in the reference tool tip surface; FIG. 4 is a partially enlarged top view showing a state in which a reference tool provided with an air outlet to be pressed is pressed against a rotation reference seat of a shaft workpiece.

FIG. 3 shows a side view and a front view of two types of shaft workpieces having different rotation reference seats in the axial direction and the rotation direction, respectively.

4A is a schematic partial perspective view showing a conventional method of pressing a rotation reference to a rotation reference seat of a shaft workpiece, and FIG. 4B is an enlarged side block diagram showing the operation of the rotation reference of FIG.

[Explanation of symbols]

 1. . Shaft work 2. . Tailstock device 3. . Chuck device 4. . Indexing device 5. . Rotation reference seat 7. . Spindle shaft 9. . Standard tool 10． . Tool changer 12． . Tool storage 13. . Tools 20. . 3-axis NC processing machine

Claims (3)

[Claims] A so-called three-axis NC machine capable of positioning a three-dimensional space by a program and performing machining with a spindle shaft capable of automatically changing tools; a tool changing device for automatically changing the tools; A reference tool that can be automatically changed between the spindle axis and the tool storage position of the tool storage section by a tool changer, and the three-axis NC so as to perform positioning of the axis work and the axial direction of the shaft work.
Each provided on the table of the processing machine, has a tailstock device that supports the shaft workpiece at one end, and an indexing device that is rotatably connected to a chuck device that grips the other end,
The reference tool selects an NC program input in advance corresponding to the spindle work, is mounted on a spindle shaft of the three-axis NC processing machine, is automatically positioned at a predetermined position, and is rotated by the indexing device. A flexible reference tool configured to press the tip end surface of the reference tool against a rotation reference seat of the shaft work, determine a rotation angle at that time, and determine the rotation angle as a reference angle of the shaft work. 2. The flexible reference tool according to claim 1, further comprising an air outlet opening at a tip end surface of the reference tool. 3. The flexible reference tool according to claim 1, wherein the reference tool has a two-sided constraint holder.