JPH0246985Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic deburring machine for synthetic resin molded products.

Up until now, no suitable machine has been developed to automatically remove burrs that occur on the parting line of synthetic resin molded products, and workers have to remove them with razors, resulting in extremely low work efficiency. Katta.

The purpose of the present invention is to solve the above-mentioned drawbacks and provide a deburring machine that can automatically deburr synthetic resin molded products easily and efficiently without requiring any troublesome operations. That is.

The basic structure of this invention is that a table for fixing the workpiece (synthetic resin molded product) is rotatably provided on the machine base, and the operating arm is moved forward and backward toward the workpiece on the table. A cutter holder is rotatably attached to the operating arm, and a guide piece and a cutter that come into contact with the workpiece are protruded from the cutter holder at a predetermined interval, and the cutter cuts into the burr with respect to the cutter holder. It is made by applying a certain rotational force in the direction,
When the actuating arm approaches the workpiece, the guide piece and the cutter come into contact with the workpiece, and the workpiece is rotated in a predetermined direction, the cutter moves along the circumference of the workpiece and burrs. is being scraped away.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In Figures 1 to 7, a circular table 2 is provided on the top surface of a machine base 1 so as to be rotatable in a horizontal plane, and a gear 4 is attached to a shaft 3 that projects downward from the table 2. . This gear 4 is not directly connected to the shaft 3, but is connected via a one-way clutch such as a cam clutch, so that when the gear 4 rotates in a predetermined direction, the shaft 3 also rotates, and the gear 4 rotates in the opposite direction. When rotated in the direction, axis 3
does not rotate. The gear 4 is engaged with a rack 6 which is coupled to a rod 5a of an actuator 5 such as a pneumatic cylinder or hydraulic cylinder installed horizontally with respect to the machine base 1 and is movable horizontally. I'm trying to rotate it.
In this embodiment, the table 2 is rotated by moving the rack 6 in the direction of arrow R, but the table 2 may be rotated by an electric motor.

A column 7 is provided on the side of the table 2,
An actuator 8 such as a pneumatic cylinder or a hydraulic cylinder is mounted vertically on the column 7,
A workpiece W on the table 2 is pressed directly or indirectly by a workpiece holder 9 connected to the rod 8a of the actuator 8.

A support 10 is vertically installed on the side of the table 2.
A tube shaft 11 is rotatably fitted to the support 10,
A plate 12 is fixed to the upper end of the tube shaft 11,
An insertion hole 13 provided at the tip of the plate 12
A height position adjusting screw 14 is inserted through the hole so that it can only rotate. A lever 15 is provided horizontally protruding from the lower end of the tube shaft 11, and one end of a wire 16 is fixed to the tip of the lever 15. After the wire 16 is stretched horizontally, it is bent downward and the tip of the lever 15 is bent downward. Weight 17
is tethered. The bent portion of the wire 16 may be guided by a pulley or roller 18. Lever 1
An actuator 19 such as a pneumatic cylinder or a hydraulic cylinder is provided near the actuator 5, and the tip of the retractable rod 19a of the actuator 19 is connected to the lever 1.
It is provided on the side surface of 5 so that it can freely approach and separate. This actuator 19 is provided to rotate an actuating arm 20, which will be described later.

An operating arm 20 having a length that reaches the table 2 is attached to an intermediate portion of the tube shaft 11 so as to be movable in the vertical direction and rotatable in a horizontal plane. This operating arm 20 has an insertion hole 21 through which the tube shaft 11 is inserted.
and a cut groove 22 reaching the insertion hole 21,
And by tightening the tightening screw 23, the insertion hole 2
The inner diameter of tube 1 is reduced so that it is fixed to tube shaft 11. The operating arm 20 is provided with a screw hole 24 at a position corresponding to the height position adjustment screw 14,
Height position adjustment screw 14 screwed into the screw hole 24
By rotating the actuating arm 20, the actuating arm 20 is moved in the vertical direction.

As shown in FIG. 4, a shaft 25 whose axis is vertically oriented is fixed to the tip of the operating arm 20, and a cutter holder 26 is rotatably attached to the lower part of the shaft 25. The cutter holder 26 has a substantially semicircular shape with a part of its outer periphery cut out, and a wire groove 27 is recessed in the outer periphery, and a wire hooking groove 28 is formed in the outer periphery on one side of the cutout surface 26A. is provided, and a cutter insertion groove 29 is provided on the outer periphery of the other side to accommodate the cutter 30.
is fixed by a set screw 31. A circular guide piece 32 is attached to the lower side of the cutter holder 26 coaxially with the shaft 25, and the cutter 3
A protrusion 33 is provided to protrude outward from 0 in the outer circumferential direction. The protrusion 33 does not always come into contact with the workpiece W, but is used to prevent the blade 30 from suddenly contacting the workpiece W. The wire 34 whose one end is hooked to the wire hooking groove 27 is
Pulley 35 and pulley 36 attached to actuation arm 20
The pulley 37 and the pulley 3 are stretched horizontally between the
8, and a weight 39 is attached to the tip of the wire 34, so that the cutter holder 26 is rotated in the direction of the arrow Q with a constant torque.
Reference numeral 40 denotes a collar screwed onto the shaft 25, and a stopper pin 41 is provided protruding from the outer peripheral surface of the collar.A pin 42 protruding from the upper surface of the cutter holder 26 contacts the stopper pin 41 to prevent rotation of the cutter holder 26. It is regulated.

A jig 43 is attached to the table 2 so that the workpiece W can be easily fixed, the workpiece W is placed on the jig 43, and the actuator 8 is operated to press the workpiece W. Next, when the actuator 19 is actuated to fit the rod 19a, the actuating arm 20 moves in the direction approaching the workpiece W, so that the blade holder 26 located at the position shown by the solid line in FIG. 3 is shown by the chain line. As the protrusion 33 comes into contact with the workpiece W, a rotational moment is generated, and the actuating arm 20 moves in a direction closer to the workpiece W, so that the blade holder 26
is rotated in the direction of arrow Q' by the rotational moment,
As shown in FIG. 5, the cutter 30 is pressed so as to bite into the burr W', and the guide piece 32 comes into contact with the burr W'. From this state, when the table 2 starts rotating counterclockwise as seen in FIG. ' are deleted as shown in FIG. Therefore, as shown in FIG. 7, the cutter 30 moves along the outer circumference of the workpiece W even at the corner portion of the workpiece W, and the burr W' is beautifully removed.

In the above embodiment, the blade holder 26 is moved toward and away from the workpiece W by rotating the operating arm 20, but by directly moving the operating arm 20, the blade holder 26 is moved toward and away from the workpiece W. It may be made to move toward and away from objects.

Further, in order to bring the cutter holder 26 closer to the workpiece W and to rotate the cutter holder 26, a certain force is applied by the weights 17 and 19, but the force is limited to the force by the weights 17 and 39. Instead, a constant force spring or actuator that generates a constant force may be used.

Since the present invention has the above configuration, it has the following advantages.

(1) Burrs are automatically removed by simply fixing the workpiece on a table and rotating it, resulting in a significant improvement in work efficiency compared to conventional manual work.

(2) Since the guide piece and the cutter touch the machined surface at the same time, and the rotational force is applied in the direction in which the knife is pressed against the machined surface, machining progresses. It is held at an angle and provides a beautiful finished surface.

(3) It is easy to deburr not only circular but also polygonal workpieces, providing excellent versatility.

(4) There is no need for a copying die that corresponds to the shape of the workpiece.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a partially cutaway front view, Fig. 3 is an enlarged plan view of the main parts, and Fig. 4 is a view taken along the line X-X in Fig. 3. , and FIGS. 5 to 7 are enlarged plan views of the main parts showing the operation procedure. Explanation of symbols of main parts, 2...Table, 20
... Operating arm, 26... Blade holder, 30... Blade, 32... Guide piece.

Claims (1)

[Scope of utility model registration request] An operating arm 20 is provided to move forward and backward toward the workpiece W on the rotatable table 2, and a blade holder 26 is rotatably attached to the operating arm 20.
The guide piece 32 and the blade 30 that come into contact with the blade holder 26 are protruded from the blade holder 26 toward the workpiece W with a predetermined distance maintained, and a force is applied in the direction in which the actuating arm 20 approaches the workpiece W. At the same time, the cutter 30 is connected to the workpiece W.
An automatic deburring machine for synthetic resin molded products, which applies rotational force to the blade holder 26 in the direction of pressing the blade.