JPS632245Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a rotary chuck device for a workpiece.
In particular, it relates to a rotary chuck device that is effective when applied to various numerically controlled machine tools, precision automatic lathes commonly called NC machine devices, or ordinary lathes.

[Conventional technology]

Conventionally, in automatic lathe equipment, after firmly chucking the workpiece with a chuck jig, chamfering, boring, and other cutting operations are performed using a combination of a high-speed rotating spindle and a fixed blade shape. When cutting a workpiece with a special shape (irregularly shaped material) or cutting not only one end side but also both ends of the workpiece, it is necessary to change the chuck direction or take out the chuck jig and re-cut the workpiece each time. The problem is being dealt with by performing check operations.

[Problem that the invention attempts to solve]

However, in the processing of the above-mentioned irregularly shaped materials, etc., extremely precise concentric characteristics are often required depending on the purpose of use, and there is a risk that slight deviations in the concentric characteristics may occur during the process of the operation. On the other hand, it has been difficult to securely hold the profiled material and maintain performance that satisfies the above requirements.

[Means for Solving the Problems] The present invention has been devised to address the above-mentioned problems, and provides a rotary chuck device that eliminates the various drawbacks mentioned above and is superior in both workability and quality. The purpose is to provide a cylindrical body that is attached to the tip of the main spindle protruding from the headstock, and a cylindrical body that is provided on the tip side of the cylindrical body and has an outer peripheral edge. A first inner hole formed in a concave spherical shape, and a first inner hole that is fitted into the first inner hole and whose outer surface is formed into a spherical body that fits the first inner hole of the body, and penetrates in the main axis direction and is opened concentrically with the main axis. a rotating body having a fitting hole;
The flange is located on the main shaft side of the first inner hole and extends from the main shaft tip, and its flange tip can press the rotating body by fluid pressure, and the rotating body can be pushed by the rotation of the tip of the first inner hole. a second inner hole into which a pressing body that can be locked to the sliding contact portion is fitted; a rotating rod that is provided so as to be connectable to a rotating device outside the body; and a spacer that is disposed by loosely fitting an end of a fixture that is located above the insertion hole of the rotating body and positions the rotating body. , a sphere fitted into a ball fitting hole provided on the upper surface of the spacer, and a bolt hole provided in a rotating body facing the sphere through a communicating hole in the body, screwing the sphere and spacer together. The chuck bolt is configured to press, and a core is interposed between the spacer and the lower part of the fitting hole, and the workpiece is fitted and fixed by the chuck bolt via the sphere and the spacer, and when the press of the press body is released, the rotating device This constitutes a rotary chuck device for a workpiece, characterized in that the rotation of the rotary rod allows the rotating body to slide 180 degrees with the workpiece and core placed thereon.

[Effect]

Since the rotating body has a fitting hole concentrically with the main shaft, the irregularly shaped member is inserted into the fitting hole via the core concentrically between the spacer and the lower part of the fitting hole. When the chuck bolt is tightened, the tip of the chuck presses the spacer onto the workpiece through the sphere.

Next, when the pressing body is moved toward the rotary body and crimped, the spherical outer surface of the rotary body and the concave spherical surface of the inner hole of the body are in close contact with each other. As the main shaft rotates, the body rotates concentrically with the main shaft, and the workpiece inside also rotates, allowing the cutting tool to cut the workpiece.

As soon as the machining of the workpiece is completed, the pressing body is moved back, the rotating device is connected to the rotating rod, and the rotating body is turned off.
When it is rotated 180 degrees, the part that was initially cut faces toward the main axis. Next, when the pressing body is advanced and the rotating body is checked, both ends of the workpiece are fixed concentrically with the main shaft and in the opposite direction from the beginning, so when machining with a cutting tool, the workpiece is precisely concentrically fixed at both ends of the workpiece. Can be cut.

Therefore, even if the workpiece has an irregular shape, it is supported by the core, so that the workpiece can be reliably fixed to the rotating body without wobbling or the like.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a longitudinal sectional view showing a side surface, and FIG. 2 is a perspective view.

The headstock 1 is erected on a machine stand (not shown), and supports the main shaft 2 horizontally. The main shaft 2 has a chuck shaft 2a and a pressing body 6 concentrically fitted in the shaft center thereof and can be moved forward and backward in the longitudinal direction by air introduced from an air source (not shown) through a passage 2b.

A body 3 consisting of a cylindrical inner cylinder part 3d and an outer cylinder part 3f is fitted and fixed on the outer peripheral edge of the tip of the main shaft 2, and the inner hole 3a of the body 3 has an inner peripheral edge of the tip formed in a concave spherical shape. A rotating body 5 is fitted inside. Also, the inner hole 3a
An inner hole 3g is provided on the main shaft 2 side of the press body 6, and the large diameter portion of the pressing body 6 is dish-shaped, and the flange tip 6a thereof is fitted inside so as to be able to press the rotary body 5 to the right in the figure. .

The rotating body 5 has an outer surface formed into a spherical body that fits the concave spherical body inner hole 3a, and front and rear end surfaces relative to the main shaft 2 are formed at right angles to the axial direction.
A circular fitting hole 4 is formed in the center concentrically with the main shaft 2.

A rotating rod 16 is inserted through the rotating body 5 at a symmetrical position on a line that passes through the center of the spherical surface of the rotating body and the center of the fitting hole 4, and is perpendicular to the axis of the fitting hole 4. At the same time, a chuck bolt 7 is screwed onto one side.

The rotating rod 16 has a clutch portion 15 formed at its tip so that it can be connected to a rotating device 15a, and when connected, the rotating body 5 can be rotated by the rotating device 15a.

Further, a spacer 8 is provided on the rotating body 5 above the fitting hole 4, and the spacer 8
, and position it so that it can move in the axial direction of the fitting hole 4 with respect to the rotary body 5, and a ball fitting hole is made in the surface on which the tip of the chuck bolt 7 can come into contact.
A sphere 9 is fitted. The chuck bolt 7 is then inserted into the rotating body 5 through the bolt hole 3b formed in the body 3 and screwed therein. By screwing in the chuck bolt 7, the chuck bolt tip becomes a sphere 9.
is pressed, and the spacer 8 is brought into close contact with the workpiece 12 under pressure. An irregularly shaped workpiece 1 is inserted between this spacer 8 and the lower part of the fitting hole 4 of the rotating body 5 via a core 14.
2 and screw in the fixing bolt 7 to fix the position of the work 12.

It was assumed that the irregularly shaped workpiece 12 had projections 13, 13 cut into both ends of the curved portion of a roughly U-shaped cross section as shown in Fig. 3. In order to reliably fix this irregularly shaped workpiece 12 in the fitting hole 4, a core 14 of the type shown in Fig. 4 was used. The outer shape of the core 14 is shaped to fit the inner peripheral surface of the fitting hole 4 to ensure accurate positioning. Reference numeral 14a in Fig. 4 denotes a fixing piece that prevents the irregularly shaped workpiece 12 from falling off.

In the above configuration, the rotating device 15a is connected to the rotating rod 1.
When the rotating body is fitted into the clutch part 15 of No. 6 and rotated 180 degrees, the rotating body rotates while making surface sliding contact with the concave spherical surface of the inner hole 3a of the body, and the workpiece is reversed 180 degrees to ensure accurate coaxiality of the workpiece. to hold.

The body inner hole 3a has a concave spherical shape, and since a substantially spherical rotating body is fitted therein, the first
As shown in the figure, the body 3 has a separable inner cylinder portion 3d formed at its base end. That is, the inner cylinder part 3d
By separating the rotating body 5 from the body 3, the rotating body 5 can be attached and detached.

A pressing body 6 is fixed to the tip of the chuck shaft 2a, and the flange tip 6a of the pressing body 6 is brought into pressure contact with the rotating body 5 by supplying air, thereby accurately positioning the rotating body 5. Can be fixed.

By rotating the main shaft 2 as described above, the body 3 rotates, and the workpiece 12 fitted therein also rotates concentrically, so that the cutting edge 17 cuts the tip of the workpiece 12 in FIG. Can be processed. After the machining is completed, the air supply is stopped, the pressing body 6 is freed, and the chuck shaft 2a is
is moved backward to separate the pressing body 6 from the rotating body 5, and the rotating device 15a is connected to the clutch portion 15 of the rotating rod 16 to rotate the rotating body 5 by 180 degrees. Therefore, the chuck shaft 2a is advanced by air, and the pressing body 6
When the workpiece 12 is crimped and fixed to the rotating body 5, the direction of the workpiece 12 can be accurately reversed by 180 degrees, and protrusions 13, 13 can be cut concentrically at both ends.

Before starting the cutting work, the above operations are prepared by inputting various command signals to the main control unit (not shown) and programming them so that all operations can be performed fully automatically. Known methods are used for program control to set details of various operations, such as forward or backward movement of the workpiece, movement of the blade, switching between bites, etc.

Note that the shapes of the core, spacer, etc. disclosed in the present invention change depending on the shape of the workpiece, so they are not limited to the shapes of the above embodiments, and the design can be changed as appropriate.

〔effect〕

The present invention has the following excellent effects.

(1) Since the rotating sliding contact portion with the body of the rotating body is a spherical surface, the concentric accuracy of the rotating body 3 can be ensured.

(2) By simply rotating the rotating body in the opposite direction using a rotating device, concentric accuracy can be easily ensured and checked by pressing the pressing body.

(3) Since a core is used, even irregularly shaped workpieces can be reliably fitted into the rotating body.

(4) Since the structure is simple, manufacturing costs are low and precision machining accuracy can be ensured.

(5) High concentricity accuracy can be maintained with extremely simple operation.

[Brief explanation of drawings]

The drawings relate to an embodiment of the present invention, in which Fig. 1 is a vertical sectional view showing a side view of the main part, Fig. 2 is a perspective view of the main part, and Fig. 3 is a longitudinal sectional view showing a side view of the main part.
The figure is a perspective view of the workpiece, and FIG. 4 is a perspective view of the core. 1... Headstock, 2... Main shaft, 2a... Chuck shaft, 3... Body, 3a... Inner hole, 3b... Bolt hole, 3c... Inner cylinder portion, 4... Fitting hole, 5... ...Rotating body, 6...Press body, 7...Chuck bolt, 8...
... Spacer, 9 ... Sphere, 10 ... Fixture, 12
... Work, 13 ... Projection, 14 ... Core, 15
...Clutch portion, 15a...Rotating device, 16...
Rotating rod, 17...blade section.

Claims (1)

[Scope of utility model registration request] a cylindrical body 3 mounted on the tip of the main spindle 2 protruding from the headstock 1; a first inner hole 3a provided on the tip side of the cylindrical body 3 and having an outer peripheral edge formed in a concave spherical shape; , a fitting hole 4 which is fitted into the first inner hole 3a, whose outer surface is formed into a spherical body that fits the first inner hole 3a of the body 3, and which penetrates in the direction of the main shaft 2 and is opened concentrically with the main shaft 2. a rotating body 5 having a flange disposed on the main shaft 2 side of the first inner hole 3a and extending from the tip of the main shaft 2, the flange tip 6a of which is capable of pressing the rotating body 5 with fluid pressure; 5 to the first
a second inner hole into which a pressing body 6 that can be locked to the rotary sliding contact portion on the tip side of the inner hole 3a is fitted; The outer tip of the rotating device 1 is inserted in the direction of the rotating device 1 outside the body 3.
5a, and a rotary rod 16 provided above the insertion hole 4 of the rotary body 15, and a rotary rod 16 provided so as to be connectable with the rotary body 5a
a spacer 8 disposed by loosely fitting the ends of fixtures 10, 10 for positioning; a sphere 9 fitted into a ball fitting hole provided on the top surface of the spacer 8; a chuck bolt 7 that is screwed into a bolt hole provided in the rotating body 5 facing each other through the communication hole 3b of the body 3 and presses the sphere 9 and the spacer 8;
A core 14 is interposed between the spacer 8 and the lower part of the fitting hole 4, and the workpiece 12 is fitted and fixed by the chuck bolt 7 via the sphere 9 and the spacer 8, and the pressing of the pressing body 6 is released. When the rotating device 15a and the rotating rod 16 rotate, the rotating body 5 is moved 180 degrees with the workpiece 12 and the core 14 placed thereon.
A rotary chuck device for a workpiece, characterized in that it is capable of sliding.