JPS58192746A - Grinding apparatus - Google Patents

Abstract

PURPOSE:To perform grinding highly efficiently, by relatively moving a tool supporting body, which compresses a grinding tool at a constant load, and a supporting table for a material to be ground in the direction, which crosses the advancing the retreating directions of the grinding tool at a right angle. CONSTITUTION:A polishing tool 3 is made to face a die sinking surface 1a of a metal mold 1 with a slight gap being provided. A grinding agent 20 is put in said gap. A slide table attaching plate 9 is lowered. When the concave and convex parts of the tool 3 are aligned and contacted with those of the metal mold 1, slide tables 7 and 8 are driven by the action of an eccentric shaft 16 which is driven by a motor 14. Then a holding metal 5 is moved in a minute circular pattern, a motor mounting table 13 is moved up and down, the relationship between the positions of the eccentric shaft 16 and a ball bearing 17 is changed, and the diameter of a circular movement is appropriately changed. Therfore, the tool 3 is simultaneously contacted with the entire surface of the die sinking surface 1a with the same contacting pressure. The entire surface 1a is automatically polished. Even the polishing of metal mold having the complicated die sinking surface can be ensured by the easy operation in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polishing apparatus for polishing a mold or the like that has been machined or electrically discharged.

Conventionally, rotary tools such as routers, slide vibrating tools, vibrating tools, ultrasonic polishing machines, electrolytic polishing machines, and the like have been commercially available as tools for polishing molds and the like. However, these methods only look at mold surfaces with simple shapes, and there are almost no tools that can automatically view mold surfaces with complex curved surfaces. In particular, it has been difficult to develop a general-purpose machine that can polish objects with deep unevenness on part of the free-form surface ◎On the other hand, conventional machines are mounted on a movable shaft or arm, and the mold surface is polished using a copying method. There are machines that automatically polish surfaces, etc., and special polishing machines developed to polish surfaces with specific shapes. However, these devices do not require complicated mechanisms such as a control device that moves the polishing tool to follow the polishing surface of the mold, and the &! There are problems such as high cost of production.

The present invention has been made in order to solve these problems, and provides a polishing device that can be easily operated even for molds with complex carving surfaces, and can be performed at low cost by simple image projection. This is what we provide.

Embodiments of the present invention will be described below with reference to the drawings.

The present embodiment relates to an apparatus for automatically polishing and polishing a plastic mold that has been subjected to electrical discharge machining.

First, to explain the apparatus, 1 is a mold as an article to be polished, 2 is a support stand on which the mold l is placed, and 3 is a die-carving machine for the mold l placed on the support stand 2. This is a polishing tool that is used as a polishing tool. This polishing tool 3 is made by reducing the size of the copper electrode used in electrical discharge machining for forming the mold l by a method such as etching, so that it resembles the carved shape of the mold l. It has a relatively small uneven polishing surface 3a, and is integrally deposited on the lower surface of a thick plate-shaped tool support 4.

5 is a holding metal fitting that holds the polishing tool 3 in a swingable manner, and this holding metal fitting 5 is configured so that the peripheral side and upper side portions of the tool support body 40 are suspended via a spring 6; The slide table 7.8 is supported so as to be movable in the horizontal and horizontal directions after the sprouting and by a cross-shaped slide table 7.8 that extends horizontally. The table arrangement is that the stand 9 is mounted on pillars 10 erected on both sides of the support stand 20.
It is movable up and down, and is supported so that it can be stopped at a predetermined height by a stop mechanism (not shown). This slide table is mounted by raising and lowering the stand 9, and the polishing tool is attached via the slide table 7.8s holding fitting 5. 3 to the truss carving surface t a of the mold l
It constitutes a perspective adjustment mechanism 11 that approaches and separates K from above, that is, moves near and far.

Further, reference numeral 12 denotes a drive mechanism for moving the slide table 7.8 back and forth, left and right, ie, in a direction intersecting the advancing and retreating direction of the sanding tool 3, with respect to the engraving surface ja of the mold l.

For example, this drive mechanism I2 has a motor mounted on a support 10.
3 is supported so that it can be raised and lowered, and the motor is mounted by attaching an eccentric shaft 16 connected to a hanging shaft 15 of the motor 4 mounted on a stand 13 to a hall bearing 17 provided in the center of the stripe/f-treble 7. By this, slide table 7
．． 8. Perform a minute circular motion ゎ-.

I set it to 5. In addition, the eccentric shaft 16 1
A tapered shape is also acceptable, and the diameter of the circular motion can be changed by engaging the different diameter portions by raising and lowering the motor mounting table 13.

In addition, a spring strength adjusting device, for example, a nut I8, is provided at the holding portion of the tool support 4 held by the holding metal fitting 5, and thereby the swinging state of the holding device 5 transmitted to the tool support 4 can be adjusted by 5T. .

Further, for example, a mold holder 19 is provided at the lower end of the support column 10 to fix the mold l.

Next, to explain the function of the polishing tool,
The polishing tool 3 is placed opposite the mold J (n-shaped carved surface 1a) with a uniform gap of about 0.5 mm, and an abrasive agent 20 made of abrasive grains such as diamond particles or alumina and oil etc. is interposed in this gap. Then, the mold I is fixed in a predetermined position with the mold holder 19, and the slide table is attached by lowering the stand 9. When the polishing tool 3 contacts the mold I with their uneven parts aligned, the motor is turned off. 14 is rotated, and the eccentric shaft 16 drives the slide tables 7 and II, causing the holding bracket 5 to move slightly in a circular motion.The radius of this circular motion is determined by moving the morph mounting H base 13 up and down, The size can be changed to an appropriate size by changing the positional relationship between I6 and ball bearing Z7.

Further, by adjusting the spring strength adjuster 18, the minute circular motion of the holding fitting 5 can be effectively transmitted to the polishing tool 3.

With this method, the die engraving surface lJ of the outer surface of the mold l
+ A polishing tool 3 having an uneven polishing surface 3a corresponding to the entire body is used, and the polishing surface 31 of the tool is oscillated with its uneven parts matching the die-sinking surface 1B of the mold l. Therefore, the tool simultaneously cleans the entire surface of the die-sinking surface Ja of the mold I with the same contact pressure, and furthermore, the tool moves in a minute circular motion via the abrasive 20, so that the entire surface of the die-sinking surface is automatically polished at the same time. be. Therefore, even a mold having a complex carved surface can be reliably polished with easy operation.

In addition, the device for carrying out the spinning method is equipped with one polisher A3, which polishes the mold 1 all at once, so there is no need for a complicated configuration such as a conventional copying device. - Therefore, it can be implemented at low cost with simple equipment.

Incidentally, in the above embodiment, the polishing tool 3 was constructed with an electrode used in electric discharge machining, but this is intended to reduce costs by reusing the electrode as a polishing tool, and if necessary,
Special polishing tools may be provided. In addition, according to the embodiment marked #, the electrode can be reused as a polishing tool unless there is a groove with a width of about 1.51 mm or less.

Further, in the embodiment described above, the sharpening tool 3 is configured to move in a minute circular motion, but it may be configured to vibrate independently in the left-right and up-down directions after spinning.

Furthermore, the driving force of the polishing tool may be one other than a motor, such as air.

Furthermore, in the Tsumugi embodiment, the polishing tool 3 is made of copper, but this is to best exhibit the discharge characteristics and polishing characteristics, and it is not possible to use other soft metals, such as those made of aluminum or a grindstone. Good too.

As described above, according to the present invention, by relatively moving the tool support, which is an abrasive tool, and the support base that supports the object to be polished, which are brought into pressure contact with each other under a constant load, in a direction perpendicular to the advancing and retreating direction of the abrasive tool. It can be polished efficiently and can be applied at low cost using simple equipment.

[Brief explanation of the drawing]

The figure is a configuration diagram showing an embodiment of the present invention. l... Mold (article to be polished), 3... Polishing tool (polishing tool), 2... Support stand, 4... Fly tool support, 12
...Drive mechanism.

Claims (1)

[Claims] A support stand that supports an article to be polished; and a tool that supports a polishing tool so that it can move forward and backward with respect to the article supported by the support stand, and presses the polishing tool against the polished surface of the article to be polished with a constant load. A polishing device characterized by comprising: a support body; and a drive mechanism that applies a grain transfer of 1+ to the support base and the tool support body in mutually orthogonal directions intersecting with the advancing and retreating direction of the polishing tool.