JPH0637884Y2 - Machine Tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a machine tool for automatically performing a process such as deburring or polishing on a peripheral surface of a work.

(Prior Art) In general, this type of machine tool is designed to perform work such as deburring while placing a work on a rotary table to rotate the jig and moving the jig forward and backward with respect to the peripheral surface of the work. ing. In this case, as a mechanism for moving the jig forward and backward with respect to the workpiece, a cam mechanism moves the jig forward and backward according to the shape of the peripheral surface of the workpiece, and recently, a computer is used to perform numerical control. It is known that the jig is moved back and forth according to the shape of the peripheral surface of the work.

(Problems to be solved by the invention) However, the above-mentioned conventional mechanism for moving the jig forward and backward is required to move the jig forward and backward with high precision in accordance with the shape of the cam. There was a problem of being expensive. In particular, numerical control requires a very expensive computer or the like and lacks versatility.

The present invention has been made in view of such a point, and its purpose is to use a simple mechanism in place of the mechanism for moving the jig back and forth, and deburr the peripheral surface of the workpiece. The processing is automatically performed.

(Means for Solving the Problem) In order to achieve the above object, a solution means of the present invention is a table for placing and holding a work, a rotation driving means for rotating the table, and a burr for a peripheral surface of the work. A jig for performing processing such as cutting or polishing and a pressing means for pressing the jig against the peripheral surface of the work with a constant force are provided. Then, the constant pressing force of the pressing means is equal to or larger than the minimum required for processing the jig, and the basic shape itself of the peripheral surface of the workpiece on which the jig rotates on the table is processed and changed. Instead, the value is set so that the workpiece moves forward and backward according to the reference shape of the peripheral surface of the work. The reference shape of the peripheral surface of the work means the original shape of the peripheral surface of the work excluding burrs and the like.

(Operation) According to the above configuration, in the present invention, the jig is pressed against the peripheral surface of the work rotating on the table with a constant force at the time of processing such as deburring of the peripheral surface of the work. The pressing force of the pressing means is set so that the jig moves back and forth according to the reference shape of the peripheral edge surface of the workpiece, so the jig changes the processing such as cutting off the reference shape itself of the peripheral edge surface of the workpiece. Without doing so, the work peripheral edge surface is subjected to deburring and the like while moving back and forth along the work peripheral edge surface.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show the overall construction of a machine tool according to an embodiment of the present invention. This machine tool deburrs the outer peripheral surface of a work W. First
In FIG. 2 and FIG. 2, 1 is a gantry, 2 is a rotary table rotatably supported on the gantry 1 about a vertical central axis, and the rotary table 2 is provided with a power transmission mechanism 3 including a belt 3a and the like. The rotary table 2 is drivingly connected to the gantry 1 as a rotary drive means, and the rotary table 2 is rotated about every one rotation by the operation of the motor 4.

On the upper part of the rotary table 2, there are provided support members 5 on which the work W is placed and supported, and the support members are provided.
5, a pair of clamp mechanisms 6, 6 for holding the work W placed thereon are provided. As shown in detail in FIG. 3, the clamp mechanism 6 includes an air cylinder 7 arranged with the piston rod 7a facing upward, and a pair of clamp members 8 connected to the tip of the piston rod 7a of the air cylinder 7. , 8
It has and. When the air cylinder 7 is in the contracted state, the pair of clamp members 8, 8 are in the closed leg state as shown by the phantom line in FIG. 3, and as the air cylinder 7 extends, the clamp members 8, 8 are moved upward from the opening of the work W. While projecting, the legs are gradually opened and the work W is pressed and held from above. In FIG. 3, 9 are guide pins for restricting the rotation of the clamp member 8 in the leg opening direction.

Further, a kicking mechanism 10 is provided between the pair of clamp mechanisms 6, 6 on the upper part of the rotary table 2, and the kicking mechanism 10 has finished deburring the outer peripheral edge surface of the work W. Sometimes the air cylinder 11 is extended and the supporting member
The upper work W is lifted by a lift member (not shown) and transferred to the work receiver 22.
The operation of the air cylinder 11 is switched by a push button valve 12 mounted on the rotary table 2, and the push button valve 12 is switched by a switch pressing air cylinder 13 mounted on the mount 1. It has become.

Further, 14 is a jig for deburring the outer peripheral surface of the work W, in which the deburring blade 15 is rotationally driven by the air sonic 16, and the mounting plate is
It is attached to the gantry 1 via 17, a shaft 18 and a bracket 19. The shaft 18 is supported so as to be slidable in the axial direction with respect to the bracket 19, so that the jig 14 is provided so as to be movable toward and away from the work W on the rotary table 2. An air cylinder 20 is attached to the bracket 19, and a tip of a piston rod of the air cylinder 20 is connected to the attachment plate 17.
By the operation of the air cylinder 20, the jig 14 moves the work W
The deburring blade 15 of the jig 14
Has a function as a pressing means that presses the jig 14 against the work W with a constant force in a state of being in contact with the outer peripheral surface of the work W. The working air pressure of the air cylinder 20, that is, the pressing force when the deburring blade 15 of the jig 14 is pressed against the outer peripheral surface of the work W is
Jig with a minimum size required for deburring 14
Reference numeral 14 is set to a value such that the reference shape of the peripheral surface of the work W rotating on the rotary table 2 is scraped off and moved in accordance with the reference shape of the peripheral surface of the work W without changing. Reference numeral 21 is a guide roller provided on the mounting plate 17, and the guide roller 21 is a jig 14
When the deburring process is performed by the above, the deburring blade 15 and the outer peripheral edge surface of the work W are brought into contact with each other to guide the movement of the jig 14 with respect to the outer peripheral surface of the work W.

FIG. 4 shows the pneumatic circuit of the machine tool, 31 is a pressure source, and the compressed air discharged from the pressure source 31 is adjusted to a predetermined pressure (about 4 kg / cm ² ) by the pressure control valve 32. After being pressed
The air is fed to the air sonic 16, the jig pressing air cylinder 20, the clamp mechanism 6 air cylinder 7, the kicking mechanism 10 air cylinder 11 and the switch pressing air cylinder 13. 33 is for connecting and disconnecting the compressed air supply to the Air Sonic 16 and turning on the Air Sonic 16
A first switching valve for switching OFF, a second switching for switching expansion / contraction operation of the air cylinder 20 by supplying / discharging compressed air to / from the expansion side air chamber 20a and the contraction side air chamber 20b of the jig pressing air cylinder 20. A pressure reducing valve 35 for reducing the pressure of the compressed air to a predetermined pressure (about 3 kg / cm ² ) is provided between the second switching valve 34 and the expansion side air chamber 20a of the air cylinder 20. .

Reference numeral 36 is a third switching valve for switching the expansion / contraction operation of the air cylinder 7 by supplying / discharging compressed air to / from the expansion side air chamber 7a and the contraction side air chamber 7b of the air cylinder 7 of the clamp mechanism 6. The compressed air is supplied to the air cylinder 11 when the compressed air is supplied to the contraction side air chamber 7b of the air cylinder 7 of the clamp mechanism 6 by the third switching valve 36, that is, the air cylinder 7 is The work W is fed only when the clamp mechanism 6 does not hold the work W in the contracted state. Between the third switching valve 36 and the air cylinder 11 of the kicking mechanism 10, compressed air is supplied to and discharged from the expansion side air chamber 11a and the contraction side air chamber 11b of the air cylinder 11.
A push button valve 12 for switching the expansion and contraction operation of 1 is provided. The push button valve 12 is switched by the expansion / contraction operation of the switch pressing air cylinder 13, and the expansion / contraction operation of the switch pressing air cylinder 13 is switched between the expansion side air chamber 13a and the contraction side air of the air cylinder 13. This is done by a fourth switching valve 37 that switches the supply and discharge of compressed air to and from the chamber 13b. Therefore,
The expansion / contraction operation of the air cylinder 11 of the kicking mechanism 10 can be remotely controlled by the fourth switching valve 37. In addition, 38 is a check valve, 39 is a filter, and 40 is a replicator.

Next, the operation of the machine tool in the above embodiment will be described. When deburring the outer peripheral surface of the work W placed on the supporting members 5, ... Of the rotary table 2,
First, the clamp mechanism 6 is actuated to hold the work W on the rotary table 2 (support members 5, ...), and then the air sonic 16 of the deburring jig 14 is rotated and the jig pressing air is pressed. The cylinder 20 is extended to press the deburring blade 15 of the jig 14 against the outer peripheral edge surface of the work W with a constant force. At the same time, the rotation table 2 and the work W on the table 2 are rotated by the operation of the motor 4. Then, the deburring blade 15 of the jig 14 is 15
Deburring is performed while moving along the outer peripheral surface of the work W while being guided by the guide roller 21 pressed against the outer peripheral surface of the work W.

In this case, the pressing force of the jig pressing air cylinder 20 is set so that the jig 14 moves back and forth according to the reference shape of the outer peripheral edge surface of the workpiece W rotating on the rotary table 2. Therefore, the jig 14 is deburred on the peripheral edge surface of the work W by the deburring blade 15 while moving forward and backward along the surface without cutting the reference shape itself of the outer peripheral edge surface of the work W. That is, a small pressing force is sufficient for removing the burr, but a very large pressing force is required for removing the reference shape itself of the outer peripheral edge surface of the work W, which is required for deburring. If the deburring blade 15 of the jig 14 is pressed against the peripheral edge surface of the workpiece W with a small pressing force, the peripheral edge surface of the workpiece W is not scraped off by the deburring blade 15, and the jig 14 is the peripheral edge surface of the workpiece W. It will move back and forth along.

In addition, the structure for moving the jig 14 forward and backward along the outer peripheral edge surface of the work W is simply the jig 14 by the air cylinder 20.
Since it is simple to press against the outer peripheral edge surface of the work W, it is very advantageous in carrying out the work, such as being cheap in cost.

Then, after the rotary table 2 rotates about 370 degrees to deburr the entire outer peripheral surface of the work W, the rotary table 2 rotates in the opposite direction by 10 degrees and returns to the original position. Next, the pressing air cylinder 20 is contracted to operate the jig 14
Is moved away from the outer peripheral surface of the work W, and the holding state of the work W by the clamp mechanism 6 is released. After that, the kicking mechanism 10 moves the work W on the rotary table 2 to the work receiver 22. As described above, a series of operations for deburring the outer peripheral surface of the work W placed on the rotary table 2 is completed.

It should be noted that the present invention is not limited to the above-described embodiment, but includes various other modified examples. For example, in the above embodiment, the machine tool of the present invention is applied to the one for deburring the outer peripheral surface of the work W. However, when deburring the inner peripheral surface of the work, in addition to deburring, polishing is performed. In particular, it can be applied to a case where a jig is pressed against a work with a relatively small pressing force at the time of processing.

(Effect of the Invention) As described above, according to the machine tool of the present invention, it is easy to press the jig against the peripheral surface of the rotating workpiece with a constant force that moves back and forth according to the reference shape of the peripheral surface of the workpiece. With such a configuration, it is possible to automatically perform a process such as deburring on the peripheral surface of the work, which is low in cost and excellent in practicality.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front view showing the overall structure of a machine tool, FIG. 2 is a left side view of the same, and FIG. 3 is a front view showing the structure of a clamp mechanism. FIG. 3 is a pneumatic circuit diagram of a machine tool. 2 …… Rotary table 4 …… Motor (rotational drive means) 14 …… Jig 20 …… Air cylinder (pressing means)

Claims (1)

[Scope of utility model registration request] 1. A table on which a work is placed and held, a rotation driving means for rotating the table, a jig for processing the peripheral surface of the work such as deburring or polishing, and the jig for the work. The pressing means for pressing the peripheral surface with a constant force is provided, and the constant pressing force of the pressing means is equal to or more than the minimum required for processing the jig and A machine tool characterized by being set to a value such that the reference shape itself of the peripheral surface of a workpiece rotating on a table can be moved back and forth according to the reference shape of the peripheral surface of the workpiece without changing the processing.