JPS6348365Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a chuck device that removably grips a workpiece for drilling, chamfering, or other processing in a workpiece using a cutting tool during automatic lathe work. It is.

[Conventional technology]

In general, a collect chuck is often used in this type of equipment, but it cannot be used when processing both ends of a workpiece at the same time, for example, the upper and lower ends, and it takes time and effort to process only one end at a time. The troublesome re-supply and re-chucking work was forced, resulting in operational inefficiency.

[The problem that the idea aims to solve]

With conventional machines, the collect chuck moves to work, making the configuration extremely complex and expensive, and it is difficult to chuck the next new workpiece unless the processed material is removed before work preparation, which reduces work efficiency. There is a constraint that cannot be improved significantly, that is, the gripping position is limited due to the structure, so other operating mechanisms and machining timing adjustment are complicated, so machining after a certain period of time is relatively delayed. This was the cause of not being able to increase productivity due to necessity.

The present invention attempts to eliminate these conventional drawbacks, and allows the chuck operation to be performed by making it possible to arbitrarily set the time required for positions that require the chuck to be opened, and to process both ends of the workpiece. The object of the present invention is to provide a mass-produced type chuck device which is highly precise and easy to adjust, which greatly simplifies the process, enables good and stable holding of the workpiece, and which is easy to adjust.

[Means to solve the problem]

The present invention provides a chuck device that holds a workpiece M with a pair of clamping members 1 and 2 provided on a table 10, in which the chuck device is supported by a guide pin 8 fitted into an eccentric position of the table 10, and A clamping member 1 fixed with the center of the eccentric guide pin 9 positioned on a line connecting the center of the pin 8 and the rotation axis of the table, and a clamping member 2 pivotally mounted on the fixed clamping member 1 by a pivot 4. and both clamping members 1 and 2.
A fitting hole 3 into which the workpiece M is inserted is formed in the opposing surfaces 1', 2' of the clamping members 1, 2', and a spring member 5 that normally biases the opposing surfaces 1', 2' in the closing direction is attached to the clamping members 1, 2'. An operating end 7 is provided on the clamping member 2 so as to face an operating rod 6 which is disposed between the spring member 2 and displaces the clamping member 2 against the elasticity of the spring member 5 and expands the insertion hole 3. The movable table 10 is equipped with a plurality of sets of the holding members 1 and 2,
This chuck device for an automatic lathe is characterized in that a movable clamping member 2 is brought into contact with a fixed clamping member 1 of adjacent clamping members 1 and 2 by a protrusion 11 and stopped.

〔Example〕

One embodiment of the present invention will be explained using drawings.
The clamping member 1, which includes the clamping member 2 slidably on a pivot 4, is positioned by guide pins 8 and 9 inserted into the table 10, and is mounted on the table 10, which forms a rotating disk, using three bolts 12. They are fixedly installed at equal intervals in a radial pattern. This guide pin 8 is fitted into a hole 13 in which a bush 12' having a position indexing hole 12'' is fitted between the main body and the table 10, and the center of the guide pin 8 and the rotation axis of the table 10 are fitted. The center of the eccentric guide pin 9 is positioned and fixed on the line connecting the center.

An end portion of the holding member 1 protruding from the edge of the table is formed with a raised step to form a surface 1' facing the holding member 2, and the opposing surface 1' and the holding member 2
Concave grooves are perpendicularly perpendicular to the table at opposing portions of the side opposing surfaces 2' at the opposing surface abutting positions, forming insertion holes 3 into which the workpiece M is inserted. In this case, the fitting hole 3, the pivot portion 4, and one of the bolts 12 are positioned on the center line of the guide pins 8, 9.

The end of the holding member 1 on the side of the table center is a raised step, and a spring member 5 is provided to constantly bias the holding member 2 in the closing direction (the direction in which the opposing surfaces 1' and 2' come into contact). ing.

The clamping member 2 has a substantially triangular shape, with one corner being formed at the surface 2' facing the pivot portion 4, the other corner being a contact part with the spring member 5, and the remaining corner having the clamping member 2. An operating end 7 is provided corresponding to the operating rod 6 that intermittently presses in the opening direction (the direction in which the opposing surfaces 1', 2' are separated) against the restoring force of the spring member 5. That is, a protrusion 11 for regulating the maximum rotation range of the clamping member 2 in the closing direction is provided at the end of the clamping member 2 on the table center side so as to protrude toward and away from an adjacent pair of clamping members 1 .

The operating end 7 and the protruding rod 11 are formed of bolts that can be freely adjusted in protrusion and retraction, and the chuck is opened so that it can be opened with the time operating rod 6 as required in the rotational range of the holding member 2, that is, in the position that requires the chuck to be opened. It has an adjustable configuration that allows you to set the time arbitrarily.

Further, the insertion hole 3 is formed with a conical recess on the upper part for hanging the flange portion of the workpiece M to prevent it from falling out, and holds both ends of the workpiece M protruding from the insertion hole 3. They are arranged so that both ends of the workpiece M can be processed simultaneously.

Since the clamping force of the pair of clamping members 1 and 2 is determined by the restoring force of the spring member 5, the spring member 5
Restore the restoring force by appropriate means (replacement of springs, replacement of rods)
You can adjust the clamping force by changing the .

In the figure, 9' is a guide notch, 14 is a cover,
15 is an extrusion pin, and 16 is a protruding and retracting shaft for index positioning provided on the main body.

[Effect]

When the clamping member 2 is in a state where the operating end 7 is pushed and rotated in the opening direction by the advancement of the operating rod 6 and is ready for insertion, the workpiece M is inserted into the insertion hole 3 and the operating rod 6 is pushed forward. After 6 has retreated, the holding member 2 is rotated in the closing direction by the spring member 5 and is firmly chucked. After completing the processing on both ends of the workpiece M that protrudes vertically from the insertion hole 3, the operating rod 6 is moved forward against the restoring force of the spring member 5, and the clamping member 2 is rotated in the opening direction. , the processed workpiece M is released from the chuck state. This opening operation will be performed in the next step.

In this case, the stopping position of the table 10 is indexed by the index hole 12'' and the protruding/retracting shaft 16, and each clamping member 1 is accurately positioned radially by the guide pins 8, 9, so that The holding members 1 and 2 can also accurately guide the workpiece M to the processing position, allowing highly accurate processing.

In addition, the insertion hole 3 and the pivot portion 4 also have a guide pin 8,
9 and the bolt holes are arranged symmetrically with the center line as the axis of symmetry, which is convenient when processing the holding member 1 or when positioning the processing tool to the workpiece M.

In this case, by setting the guide pins 8 and 9 eccentrically in the most important center alignment when using multiple chuck devices, it is possible to easily align the centers of all 6 to 12 chuck devices. It's convenient.

In this embodiment, the table 10 provided with the chuck device is illustrated as a rotating disk table, but it can also be used as a slide table, or it can be provided directly on a fixed part.

It is also possible to configure the holding members 1 and 2 to be rotatable on separate pivot parts or on the same pivot part, and to appropriately attach a spring member and an operating rod to control forward and reverse rotation. .

[Effect of idea]

The present invention provides a chuck device in which a workpiece M is held by a pair of clamping members provided on a table. A clamping member fixed with the center of the eccentric guide pin positioned on a line connecting the rotational axes of A spring member that forms a fitting hole into which the workpiece M is inserted and always biases this opposing surface in the closing direction is interposed between the clamping members, and the clamping member resists the elasticity of the spring member. The movable table is equipped with a plurality of sets of the clamping members, each of which has an operating end facing the operating rod that displaces the insertion hole and expands the insertion hole, and the movable table is equipped with a plurality of sets, By stopping the movable clamping member in contact with the fixed clamping member with a protrusion, the chuck opening time can be set arbitrarily, and even if it is necessary to make adjustments, it can be handled without changing the entire opening/closing operation. Therefore, the chuck opening time can be easily and quickly changed without requiring a change in the shape of the cam, and since the clamping member is eccentrically fixed with a pair of guide pins, it is possible to easily change the chuck opening time in the circumferential direction of the table. can be adjusted for multiple sets, and can be stopped using the chuck mechanism installed next to it, increasing stability, simplifying assembly, and having a mechanism that only operates one clamping member. The chuck accuracy and stability can be greatly improved because of the use of a collector chuck, and it is now possible to simultaneously machine both the upper and lower ends of a workpiece that cannot be machined with a collect chuck, greatly increasing machining efficiency. Since it is a clamping type chuck, chuck work is significantly simplified, and it enables good and stable holding of the workpiece, and is easy to adjust, easy to remove and install, and easy to restore.
A high-precision, mass-produced chuck device can be provided with a simple configuration, easy to manufacture, and inexpensively, and can be easily adjusted and conveniently handled.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is an enlarged vertical sectional view taken along line A-A in FIG. 1, and FIG. 3 is an enlarged longitudinal sectional view taken along line BB in FIG. 1. It is. DESCRIPTION OF SYMBOLS 1, 2... Holding member, 3... Fitting hole, 4... Pivotal part, 5... Spring member, 6... Operating rod, 7... Operating end, 8, 9... Guide pin, 10... Table, 11...rod, 12...bolt, 12''...
Index hole.

Claims (1)

[Claims for Utility Model Registration] (1) In a chuck device that holds a workpiece M with a pair of clamping members 1 and 2 provided on a table 10, a guide pin 8 is inserted into an eccentric position of the table 10. and the guide pin 8
A clamping member 1 is fixed by positioning the center of an eccentric guide pin 9 on a line connecting the center of the table with the rotation axis of the table, and a clamping member 2 is pivotally mounted on the fixed clamping member 1 by a pivot part 4. A fitting hole 3 into which the workpiece M is fitted is formed in the opposing surfaces 1' and 2' of both the clamping members 1 and 2, and a spring is provided which normally biases the opposing surfaces 1' and 2' in the closing direction. A member 5 is interposed between the clamping members 1 and 2, and the clamping member 2 is displaced against the elasticity of the spring member 5, and the operating end is moved toward the operating rod 6 that expands the insertion hole 3. 7
are provided on the clamping member 2. A plurality of sets of the clamping members 1 and 2 are provided on the movable table 10, and adjacent clamping members 1, 2 are provided on the clamping member 2.
The movable clamping member 2 is attached to the fixed clamping member 1 of 2.
1. A chuck device for an automatic lathe, characterized in that the chuck is stopped by contact at 1. (2) Practical use in which the insertion hole 3 protrudes from both ends of the workpiece M, and forms a conical recess for hanging the flange portion of the workpiece M to prevent it from falling out. A chuck device according to claim 1 of the patent registration claim. (3) The table 10 is a disc table that rotates, and a plurality of sets of the holding members 1 and 2 are arranged radially around the rotation axis, and each set has a hole 13 for inserting the guide pin 8. The chuck device according to claim 1 or 2, which is provided with a bush 12' having an index hole 12'' for position regulation.