JPS6090610A - Automatic kelly device for machine tool - Google Patents

Abstract

PURPOSE:To improve precision of rotation and machining by forming the captioned device in such a manner that a workpiece is swivelled on the basis of the tip of a center when a clamping click of kelly board clamps the workpiece. CONSTITUTION:Configuration of an automatic kelly device is such that a kelly board 13, equipped with normally closed type clamping clicks 19 which clamp a workpiece W engaged with the tip 9 of a center 8, is rotatably provided, by means of kelly rods 7 of a main shaft stand 1, in the front side position of the center 8 fitted in the main shaft stand 1 for a cylindrical grinder or the like provided with a device 10 stopping the workpiece W at specified position. When a plunger 28 is moved, the clicks 19 of the kelly board 13 stopping at a specified position are unclamped, while the clicks 19 of the kelly board 13 clamp the workpiece W when the plunger 28 is restored to the original position, and the kelly board 13 is separated from an operational machanism 25. Due to the abovementioned structure, precision of not only rotation but also machining can be improved.

Description

Detailed Description of the Invention The present invention is a cylindrical grinding machine or other machine tool equipped with a device for stopping a workpiece in a fixed position, in which the rotation of a kelly bar in a headstock is directed to the tip of the center of the headstock. This invention relates to an automatic kerating device that transmits information to a clamped workpiece.

In the conventional keley, a bolt for quamp is passed through and screwed into the circumferential wall of an annular main body that fits into the workpiece, and two prongs protrude from the outer surface of the body's circumferential wall to come into contact with the keley rod. . However, as is well known, this type of installation requires manual labor by an operator, which takes a lot of time and effort. Therefore, a device called an automatic worked wiper was invented to save time and automate the process. In this device, a cylinder is rotatably fitted to the front part of the center protruding from the headstock, and a lever that comes into contact with the kelly rod is attached to the rear end of the cylinder. It is equipped with claws that automatically clamp the workpiece using centrifugal force. However, when the workpiece is rotated using this device, the workpiece tries to rotate based on the tip of the center, and at the same time, it tries to rotate based on the center of rotation of the cylinder. Since it starts from one turn,
Unlike the above-mentioned case of the Keret, which rotates only with the tip of the center as a reference, the rotation accuracy is poor, and therefore the machining accuracy is poor.

Therefore, in order to rotate the workpiece based only on the tip of the center, the present inventor developed an automatic kerating device which consists of an operating mechanism that opens and closes the clamping claw of a kerating machine, in which the clamping claw clamps the workpiece to the workpiece. I invented something. However, this automatic kerating device is designed in such a way that the clamping claws of the kerating machine can be opened and closed no matter where the workpiece and the clamping claws of the kerating machine fixed to the workpiece stop. It's complicated. On the other hand, some machine tools are equipped with a device attached to the headstock to stop the workpiece in a fixed position, and the above-mentioned automatic kerating device is not suitable for machine tools equipped with such a fixed position stopping device. stomach.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide an automatic kerating device suitable for a machine tool equipped with a fixed position stopping device for a workpiece.

Next, one embodiment of the present invention will be described.

The automatic kerating device of this example shown in Figs. (
8), there is a always-closed clamping claw O1 that clamps the workpiece held at the center tip (9).
A kelley machine 03 is provided rotatably by a kelley rod (7) on the headstock, and a plunger (c) rod is installed in front of the center (8) to operate the clamp claw 09 of the kelley machine stopped at a fixed position. When the plunger (A) moves, the clamp claw of the Kelley machine that has stopped at the fixed position is unclamped, and when the plunger (C) returns to its original position, the clamp of the Kelley machine is unclamped. The device is such that the claw 0!1 is clamped to the workpiece (WI), and the kerating machine 03 fixed to the workpiece (W) is separated from the operating mechanism (c).

The headstock (1) has one hole in the center (3
) is inserted through the shaft center position, and a pulley (5) is fitted on the outer periphery of the front part of the main shaft (2) through the ball bearing (41, (41). It is connected to the motor with a belt, and a disc-shaped face plate (
6), and attach 1 to the front of the face plate (6) exposed to the outside.
A book stick (7) is protruding from it. Fixed position stop device O
As shown in Fig. 1, the CI has a proximity switch (11) installed at the rear position of the rear end surface of the pulley (5), and a Boo! A dog (0) is provided protruding from the rear end surface of J (5), and the dog (1) is installed after the headstock stop signal is output.
2 is the proximity switch (when approaching the gong, the pulley (5)
The motor that rotates the face plate (6) is braked and stopped.
Therefore, a device is provided to stop the kelly rod (7) at a fixed position.

As shown in FIGS. 2 and 3, the Kelley board 0→ has a rotary drive hole 09 penetrating each corner of a substantially rectangular frame-shaped base plate α, and each rotary drive hole 09 has a The narrow diameter part of each of the two-step diameter Kelley rods (7) is loosely fitted and passed through, and a locking washer (IG) is fixed with a nut on the protruding tip of the narrow diameter part of each Kelley rod (7). Attach the corners of the base plate (0
As shown in the figure, the claw guide grooves 07) are inserted vertically into the back surface of the center part of the thickness on the upper side and lower side of the base 0→, and the base plate (14) is inserted in the front position of each claw guide groove a71. Claw guide holes are provided vertically on the upper and lower sides, respectively.
Two clamp claws α9, 09 are arranged in the upper and lower parts of the base 04) in the vertical direction, and the handles (4) protruding from the rear of the base of each clamp claw OcJ are placed in each claw guide groove 07). At the same time, the guide shafts 121) protruding from the front of the base of each clamp claw 09 are slid into the 0 mark of each claw guide hole, and the helical springs loosely fitted into each guide shaft C21) are inserted into each guide shaft C21). A V-shaped claw protruding opposite +Ill from the base of the clamp claw 09 and the base (fitted between the upper side or lower side of 141, and the guide shaft C21 at the front of the base of both clamp claws 01 and Ql) (C), I23 are placed opposite each other by sandwiching the center tip (9), and both clamp claws rl'l are held by the two spiral springs (2) and (A), (I!1 is placed between the center tip (9)
The device is designed to clamp the workpiece by moving it to the side and closing it. Also, as shown in FIG. A conical recess is provided for operating the clamp claw.

As shown in Figure 1, the operating mechanism (C) has plunger holes (C) on the upper and lower sides of the protruding front part of the center (8) fitted into the center hole (3) of the headstock. A plunger (A) with a diameter of 12 stages is slid into each plunger hole Qe, which is bored in the vertical direction, and a circular plate-shaped lid plate is placed over the opening tip of each plunger hole (A). Lid plate (5)
The small diameter part of the plunger (A) is protruded from the center hole of each plunger (A), and the conical tip (4) of the small diameter part of each plunger (C) faces the four conical parts 0 of each clamping claw of the Kelley disk, and each Fit a spiral spring (to) between the large diameter part of the plunger rod and each cover plate (a), and place each plunger (c) on the proximal end side of the plunger hole (L) and both plunger holes (i). ), the pressure passage hole drilled at the axial position of the center (8) is connected to the base end of (a), and the pressure passage OI)
The various hydraulic power sources shown in the figure are connected to. When oil is forced into the pressure passage 61), the pressure oil flows into each plunger hole ImG, and each plunger (c) is moved by its helical spring (c).
), the conical tip of each plunger comes into contact with the four conical parts of each clamp pawl of the Kelley disk, and both clamp pawls (: m , (HJ is the helical spring eJ , When the pressure passage I3 is opened, the pressure oil in each plunger hole (e) flows out, and each plunger head is restored to its original position by its helical spring ω. The conical tip of each plunger is spaced apart from the conical recess (c) of each clamp claw, and both one-button claws Q=le, On are separated from their spiral springs (
A), the workpiece (clamped to the workpiece) and engaged with the tip (9) of the sender is separated from the operating mechanism (c).

When using the automatic kerating device of this example, the pressure passage 61
), open the clamp claws 01゜09 of the kelly machine to unclamp it, and remove the center tip (9) of the headstock.
and the center point of the presser (not shown), open the workpiece (pressure passage C31) between them, and close the quake jaw bend, 09, and move the workpiece (the headstock of the (1
) side end and the workpiece (c) is separated from the operation mechanism (c), then the headstock (c) is separated from the operation mechanism (c).
1), rotate the face plate (6), and rotate the Kelley rod (7).
) is rotated, and the integrated kerating machine 0; and the workpiece are rotated.Then, the workpiece is rotated with the center tip (9) as a reference.

When the dog OQ approaches the proximity switch 0υ after the stop signal of the headstock (1) is output, the rotation of the kerating rod (7) stops and the kerating machine (in order) and the workpiece (in order) When stopped at the fixed position shown in Fig. 3, the conical recesses (c) of each clamping claw of the Kelley disk face the conical tips (a) of the narrow diameter portions of each plunger (β) of the operating mechanism. When oil is pumped into the pressure passage C, the clamp claw a!
J and aq are released and unclamped.

As is clear from the description of the above embodiments, the present invention includes:
A kelley machine equipped with a always-closed clamping claw that clamps a workpiece that is engaged with the tip of the center at the front side of the center fitted in the headstock of a machine tool equipped with a fixed-position stop device for the workpiece. is rotatable by a kerating rod on the headstock, and an operating mechanism is provided at the front of the center with a plunger that operates the clamp claw of the kerating machine that is stopped in a fixed position.When the plunger moves, it stops in a fixed position. When the clamp claw of the Kelley machine is unclamped and the plunger returns to its original position, the clamp claw of the Kelley machine clamps the workpiece, and the Kelley machine that is fixed to the workpiece is separated from the operating mechanism. This is an automatic kerating device for machine tools that is characterized by:

In this automatic kerating device, when the clamp claw of the kerating machine clamps the workpiece, the kerating machine fixed to the workpiece separates from the operating mechanism, so that the workpiece is aligned with the tip of the center as a reference. Rotate. Therefore, rotation accuracy is high and machining accuracy is high. In addition, the structure is simplified because the clamping claws of the kerating board stopped at a fixed position are operated.

Therefore.

This is an automatic kerating device suitable for machine tools equipped with a fixed position stopping device for the workpiece.

[Brief explanation of the drawing]

FIG. 1 is a partially vertical side view of an automatic kerating back for a machine tool according to an embodiment of the present invention. The 1 year old is a front view of the same device. FIG. 3 is a partial plan view of the device. 1: Headstock 7: Kelley rod 8: Center 9: Tip 10: Fixed position stop device 13: Kelley board 19: Clamp claw 25: Operation mechanism 28 Ni lunger W: Workpiece

Claims (1)

[Claims] A kerat is equipped with a permanently closed clamp claw that clamps the workpiece that is engaged with the tip of the sender, on the front side of the center fitted to the headstock of a machine tool equipped with a device to stop the workpiece in a fixed position. The board is rotatable by a kerating rod on the headstock, and an operating mechanism is provided at the front of the center with a plunger that operates the clamp claw of the kerating board that is stopped at a fixed position.When the plunger moves, it returns to the fixed position. When the clamp claw of the stopped Kelley machine unwound and the plunger returns to its original position, the clamp claw of the Kelley machine will clamp to the workpiece, and the Kelley machine fixed to the workpiece will be separated from the operation mechanism. An automatic kerating device for machine tools, which is characterized by the following: