JPH0655387A - Machining center - Google Patents

Abstract

PURPOSE:To easily perform plural kinds of machining work such as plane milling, boring and outer diameter machining, and moreover shaft cutting by providing a face plate with a sliding part reciprocated in the U-axis direction orthogonal to the axis of a main spindle. CONSTITUTION:The lateral-longitudinal movement and rotation of a moving table 4 is performed by A Z-axis driving means, an X-axis driving means and a rotatory-driving means, and a spindle head 6 is further moved in the Y-axis direction to control the relative position relation between the machined face of a workpiece 33 and the blade edge of a machining tool 32, thus performing specified machining to the machined face. At the time of changing machining work, the machining tool 32 to be fitted to a tool holder is changed, and a sliding part 8 is moved in the U-axis direction to change the distance between the axis 31 of a main spindle and the blade edge of the machining tool 32. This enables plural kinds of machining work such as plane milling, boring and outer diameter machining, and moreover shaft cutting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining center for performing flexible processing work at a factory production site.

[0002]

2. Description of the Related Art In recent years, a flexible production process has been proposed in order to cope with a shortage of manpower at a production site, an increase in cost due to an increase in manufacturing indirect personnel, and a switch from a mass production system to a high-mix low-volume production system. .

[0003]

However, what is important for realizing a flexible production process is that the processes can be recombined in a short time and the production schedule can be easily changed. It is necessary that each of the processing machines that make up the machine itself be multifunctional and flexible. For this reason, there is an increasing demand for high-performance machining centers that perform a plurality of types of machining operations with a single machine.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a machining center capable of performing more processing operations than ever before.

[0005]

In order to solve the above-mentioned problems, a machining center of the present invention has a movable table and a fixed column arranged on a bed, and Z-axis drive means for reciprocating the movable table in the Z-axis direction. An X-axis driving means for reciprocating the moving table in the X-axis direction orthogonal to the Z-axis in the horizontal plane and a rotation driving means for rotating the moving table around the vertical axis are provided, and the fixed column is moved up and down in the vertical Y-axis direction. A spindle head is provided, a spindle that rotates around a horizontal axis is provided on the spindle head, a face plate that rotates integrally with the spindle is attached to the tip of the spindle, and the face plate reciprocates in the U-axis direction orthogonal to the axis of the spindle. The slide portion is provided, and the slide portion is provided with a tool holder that detachably holds the processing tool.

[0006]

In the above construction, the face plate is rotatably driven around the axis of the main shaft via the main shaft of the main spindle head, and the workpiece placed on the moving table by the machining tool held in the tool holder rotating with the face plate. To process.

At this time, the Z-axis driving means, the X-axis driving means, and the rotation driving means move the movable table to the left, right, front and rear, and rotate it, and further, move the spindle head in the Y-axis direction to obtain a workpiece. Predetermined machining is performed on the machined surface by controlling the relative positional relationship between the machined surface and the cutting edge of the machining tool.

When the machining operation is changed, the machining tool attached to the tool holder is changed and the slide portion is moved in the U-axis direction to change the distance between the shaft center of the spindle and the cutting edge of the machining tool. As a result, it is possible to perform a plurality of types of machining operations such as flat surface milling, boring and outer diameter machining, and shaft machining.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram showing the configuration of a machining center of the present invention. In FIG. 1, a Z-axis moving base 2 that moves in the Z-axis direction is provided on a bed 1, and the Z-axis moving base 2 moves in the X-axis direction that is orthogonal to the Z-axis in the horizontal plane. A pedestal 3 is provided. Also, the X-axis moving base 3
Is provided with a movable table 4 that rotates around the vertical axis.

Further, the bed 1 is provided with a fixed column 5, and the fixed column 5 is provided with a spindle head 6 which moves up and down along a guide in the vertical Y-axis direction. A face plate 7 that rotates integrally with the main shaft is attached to the tip of the main shaft that rotates around the horizontal axis of the main shaft head 6, and a slide portion that reciprocates in the U-axis direction that is orthogonal to the axis of the main shaft is attached to the face plate 7. 8 are provided. Further, the slide portion 8 is provided with a tool holder 9 that holds a machining tool in a detachable manner.

As shown in FIGS. 2 and 3, a Z-axis screw feed mechanism 10 is provided as a Z-axis driving means between the bed 1 and the Z-axis moving base 2 to move the Z-axis moving base 2 and the X-axis. Pedestal 3
An X-axis screw feeding mechanism 11 is provided as an X-axis driving unit between them. Further, a rack and pinion mechanism 12 is provided between the X-axis moving base 3 and the moving table 4 as a rotation driving means. Further, a Y-axis screw feed mechanism 13 is provided between the fixed column 5 and the spindle head 6 as Y-axis driving means. Further, the fixed column 5 is provided with a tool pot 14 containing various processing tools and a tool changer 15 for exchanging the processing tools, and an automatic pallet changing device 16 is provided near the bed 1.

As shown in FIGS. 4 to 5, the main spindle head 6 is provided with a horizontal main spindle 17 and a U-axis drive shaft 18 which is inserted through the main spindle 17 and the main spindle 17 is interlocked with a spindle motor 19. The U-axis drive shaft 18 is linked to the U-axis servomotor 20.

The face plate 7 mounted on the tip of the main shaft 17
Is provided with a U-axis 21 in a direction orthogonal to the axis of the main shaft 17, and the U-axis drive shaft 18 and the U-axis 21 are provided with a gear 22a,
It is interlocked via 22b. Also, the face plate 7 is the U-axis 21.
Is rotatably held, and the slide portion 8 is screwed onto the U-axis 21 via the hold portion 8a, and withdraws in the axial direction of the U-axis 21 as the U-axis 21 rotates.

The operation of the above structure will be described below.
The Z-axis screw feed mechanism 10 is driven to move the X-axis moving base 3 and the moving table 4 together with the Z-axis moving base 2 so that the moving table 4 corresponds to the automatic pallet changing device 16. In this state, the pallet holding the workpiece is supplied onto the moving table 4 by the automatic pallet changing device 16.

Then, the Z-axis screw feed mechanism 10 is driven to move the Z-axis moving pedestal 2 and the X-axis moving pedestal 3 and the moving table 4 so that the workpiece corresponds to the face plate 7, and the tool holder 9 of the face plate 7 is moved. The workpiece is machined by the machining tool held at. This processing work is performed by the spindle motor 19
The tool holder 9 rotates the face plate 7 around the axis of the main shaft 17 via the main shaft 17 and rotates together with the face plate 7.
It is carried out by rotating the machining tool held at.

At this time, the Z-axis screw feed mechanism 10, the X-axis screw feed mechanism 11, and the rack and pinion mechanism 12 move the rotary table to the left, right, front and rear, and rotate it, and further, the Y-axis screw feed mechanism 13 rotates the spindle head 6. Is moved in the Y-axis direction to control the relative positional relationship between the machined surface of the workpiece and the cutting edge of the machining tool.

When changing the machining work, the machining tool held in the tool holder 9 and the tool pot 14 are held.
The tool changer 15 is used to replace the various working tools housed in the tool, and the working tools are changed to those suitable for the intended working operation. At this time, if necessary, the U-axis drive shaft 18
Drive the U-axis 21 to rotate the slide portion 8 to the U-axis 2
The distance between the shaft center of the main shaft 17 and the cutting edge of the machining tool is changed by moving the shaft 17 in the direction of the shaft center 1. As a result, it is possible to perform a plurality of types of machining operations such as flat surface milling, boring and outer diameter machining, and shaft machining.

FIG. 6 shows the surface cutting work.
By moving the slide portion 8 in the U-axis direction, the tool holder 9 is not separated from the axis 31 of the spindle 17 by an appropriate distance, and the machining tool 32 mounted on the tool holder 9 is moved by the axis 31 of the spindle 17.
It is driven to rotate around, and the spindle head 7 is moved up and down by the Y-axis screw feed mechanism 13 to surface cut the workpiece 33. Also,
As shown in FIG. 7, the workpiece 33 may be moved.
In any case, it is possible to perform machining at a constant peripheral speed, and it is possible to efficiently perform highly accurate chamfering.

FIG. 8 shows a machining operation for machining the inner diameter. According to the inner diameter of the hole for machining the cutting edge of the machining tool 32 held in the tool holder 9, there is no appropriate distance from the shaft center 31 of the spindle 17, and the tool holder. Processing tool 32 attached to 9
By rotating the rotary table 4 around the axis 31 of the main shaft 17 and moving the movable table 4 by the Z-axis screw feed mechanism 13, a straight hole, a tapered hole, or a stepped hole can be freely processed in the workpiece 33.

FIG. 9 shows a groove machining operation.
By moving the tool holder 9 in the U-axis direction, it is possible to perform backing processing, O-ring groove processing, etc., which are difficult to process. Figure 10
Shows the machining work of the outer diameter cutting, and there is no proper distance from the shaft center 31 of the spindle 17 according to the outer diameter of the shaft for machining the cutting edge of the machining tool 32 held in the tool holder 9, and the machining tool 32 is mounted on the tool holder 9. The machining tool 32 that has been
Outer diameter cutting is performed by rotating the movable table 4 by one rotation and moving the movable table 4 by the Z-axis screw feed mechanism 13.

FIG. 11 shows a threading work operation. By synchronizing the rotation of the face plate 7 by the main shaft 17 and the feed of the workpiece 33 by the Z-axis screw feed mechanism 13, a female of arbitrary pitch is formed. Can process screws. Further, as shown in FIG. 12, it is also easy to machine a male screw.

FIG. 13 shows a drilling work, and FIG. 14 shows a tapping work. Figure 15 shows
It shows the processing work of taper cutting, and the processing tool 32 is U
By moving the workpiece 33 in the Z-axis direction while moving it in the axial direction, the tapered surface can be machined, and chamfering and R machining are easy.

FIG. 16 shows a machining operation for milling, which allows highly efficient machining with a milling cutter and facilitates surface machining by rotating the moving table 4. FIG. 17
Indicates a machining operation of milling, and groove processing and curved surface processing can be performed by using an end mill, a ball mill or the like.

In addition, compound processing can be performed by combining spherical surface processing, tapping processing, turning, rotary cutting, and drill / table rotation.

[0025]

As described above, according to the present invention, by moving the slide portion provided on the face plate in the U-axis direction, flat surface milling, boring and outer diameter processing, and shaft cutting are performed. It is possible to easily perform multiple types of processing operations such as processing.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a machining center of the present invention.

FIG. 2 is a front view of a machining center according to an embodiment of the present invention.

FIG. 3 is a plan view of a machining center according to the same embodiment.

FIG. 4 is a cross-sectional view of a face plate in the example.

FIG. 5 is a partially cutaway sectional view of a face plate in the example.

FIG. 6 is an explanatory diagram showing a surface cutting processing operation in the embodiment.

FIG. 7 is an explanatory diagram showing a machining operation for plane cutting in the example.

FIG. 8 is an explanatory diagram showing a working operation of inner diameter working in the embodiment.

FIG. 9 is an explanatory diagram showing a machining operation for groove machining in the example.

FIG. 10 is an explanatory diagram showing an outer diameter cutting working operation in the embodiment.

FIG. 11 is an explanatory view showing a working operation of female thread cutting according to the embodiment.

FIG. 12 is an explanatory diagram showing a machining operation of male thread cutting in the example.

FIG. 13 is an explanatory diagram showing a working operation of drilling according to the embodiment.

FIG. 14 is an explanatory diagram showing a processing operation of tap processing in the example.

FIG. 15 is an explanatory view showing a working operation of taper cutting in the same example.

FIG. 16 is an explanatory diagram showing a machining operation of milling in the example.

FIG. 17 is an explanatory view showing a machining operation of milling in the same example.

[Explanation of symbols]

 1 Bed 2 Z-axis moving pedestal 3 X-axis moving pedestal 4 Moving table 5 Fixed column 6 Spindle head 7 Face plate 8 Slide part 9 Tool holder 10 Z-axis screw feed mechanism 11 X-axis screw feed mechanism 12 Rack and pinion mechanism 13 Y-axis screw Feed mechanism 17 Spindle 18 U-axis Drive shaft 21 U-axis

Claims (1)

[Claims] 1. A movable table and a fixed column are arranged on a bed, and the movable table is reciprocated in the X-axis direction orthogonal to the Z-axis in a horizontal plane with Z-axis drive means for reciprocating the movable table in the Z-axis direction. The X-axis driving means and the rotation driving means for rotating the moving table around the vertical axis are provided, the fixed column is provided with a spindle head that moves up and down in the vertical Y-axis direction, and the spindle head is provided with a spindle that rotates around the horizontal axis. , A tool holder that mounts a face plate that rotates integrally with the main shaft at the tip of the main shaft, provides a slide part that reciprocates in the U-axis direction orthogonal to the axis of the main shaft on the face plate, and removably holds a processing tool on the slide part. A machining center characterized by the provision of.