JPS59129651A - Apparatus for polishing mold - Google Patents

Abstract

PURPOSE:To obviate the possibility that will result in the variation of the finished preciseness of a cavity inner surface of a mold, and to finish the inner surface of the cavity as a whole with uniform preciseness. CONSTITUTION:A plurality of adjust bolts 2 are attached to the undersurface of a base plate 1 of a mold polishing apparatus. Lower ends of cover plates 5, 5 are secured to opposite side of a slid plate 4 by screws. A table 15 as well as a worm wheel 12 is rotatably attached to a bearing member 7. The worm wheel 12, a worm 16 and a motor 18 constitute a mechanism 19 for rotatably driving the table 15. A mold 23 is formed with a cavity 24 with a relatively complicated configuration by means of electrospark machining or wire cutting. Thus, the finished preciseness of the cavity inner surface of the mold is less scattered and the inner surface can be finished uniformly as a whole.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a mold polishing device that uses a grinding tool to grind a surface to be ground on the inner surface of a mold cavity.

[Technical background of the invention and its problems]

Generally, when molding a complex-shaped cavity in a mold, means such as electrical discharge machining or wire cutting are used. If the cavity of the mold is formed by means such as electrical discharge machining or wire cutting, the inner surface of the cavity must be ground using a tool such as a square grindstone or abrasive cloth after the gap forming is performed by electrical discharge machining or wire cutting. Next, use Schiff 0 liquid, which is a mixture of a processing liquid such as olive oil and a lapping agent such as diamond abrasive grains, aluminum oxide, or silicon carbide, along with a wrapping or polishing tool for a piece of wood, bamboo, or felt of an appropriate shape. The interior surface of the mold cavity was then finished. And in this case,
BACKGROUND OF THE INVENTION Polishing tools such as corner grindstones and coated abrasive paper, lapping tools, and polishing tools are driven by human power or by simple manual tools equipped with a rotary drive mechanism or a reciprocating vibration mechanism.

However, since the work of moving polishing tools and polishing tools to match the shape of the mold cavity was done manually, the finishing accuracy of the inner surface of the mold cavity varied depending on the level of skill of the operator. There were problems that arose. Furthermore, polishing tools? When grinding the inner surface of a mold cavity with a lithing tool, it was difficult to press the grinding tool or polishing tool into contact with the entire inner surface of the cavity with uniform processing pressure, so some parts of the inner surface of the cavity were The finishing accuracy was poor and it was easy to scratch, and there was a risk that the entire inner surface of the cavity could not be finished with uniform precision.

[Purpose of the invention]

An object of the present invention is to provide a mold polishing device that is capable of finishing the entire inner surface of the cavity with uniform precision, without the risk of variations in the finishing accuracy of the inner surface of the cavity of the mold. be.

[Summary of the invention]

A bearing member is attached to a slide plate provided horizontally movably on the pace plate, a table holding a mold having a cavity to be ground is rotatably supported by the bearing member, and the table is disposed above the table. A grinding tool is provided and supported rotatably in the same direction as the rotational direction of the table, and is insertable into the cavity of the mold on the table, and the grinding tool is inserted into the cavity of the mold together with an appropriate abrasive. Then, while applying processing pressure between the grinding tool and the mold by an urging member provided between the slide plate and the pace plate, the grinding tool is vibrated upward and downward, and the The table is driven to rotate.

[Embodiments of the invention]

The figure shows one embodiment of the invention.

1 and 2 show the entire mold polishing apparatus, where l is the pace grade. A plurality of adjustment bolts 2... are attached to the lower surface of this pace fv-) 7, and by adjusting these adjustment bolts 2..., the space plate 1 can be adjusted approximately horizontally. is now possible. Further, bearings 3... are attached to the upper surface of the pace grating, and a slide plate 4 is mounted horizontally on top of these bearings 3...
It is provided so that it can be moved diagonally forward, backward, left and right.

The lower ends of the backing plates 5.5 are screwed to both sides of the slide plate 4, respectively. Further, a bearing member 7 is provided above the slide plate 4 via an adjustment bolt 6.
is located. This adjustment bolt 6 is arranged at the center of one end of the bearing member 7, and
The other end is rotatably supported on the upper end of the backing plate 5.5. The bearing member 7 is adjusted substantially horizontally by an adjuster del toro and is fastened to the upper end portions of the first backing plates 5, 5 by bolts 8. It's a trench, this bearing member 7 has a bearing part 9 in the center.
is formed. This bearing portion 9 is formed of a first circular hole lO with a small diameter in the upper part and a second circular hole lO with a large diameter in the lower part. A shaft portion 13 protruding from the center lower surface of the worm wheel 12 is inserted into the first circular hole IO. This has been warm. Further, a table 15 is integrally screwed onto the worm wheel J2. Therefore, the table 15 and the worm wheel 12 are rotatably attached to the bearing member 7. The worm 16 is meshed with the worm wheel 2. One end of this worm 16 is connected to the third
As shown in the figure, the receiver provided on the bearing member 7 is attached to a plate J7. Further, the other end of the worm 16 is attached to a first motor 18 disposed on the slide plate 4. And these worm wheels 12. table 1 by worm 16 and first motor knob 8
A rotational drive mechanism 9 is formed to rotationally drive the rotational drive mechanism 5.

Further, a plurality of mounting members 22 . . . consisting of a tightening plate 20 and bolts 2 are provided on the upper surface of the table 15 . It is designed to be mounted on top. As shown in FIG. 4, this mold 23 has a cavity 24 having a relatively AC shape formed by electrical discharge machining, wire cutting, or the like.

On the other hand, side plates 25.2 are provided on both sides of the base plate.
The lower end portions of 5 are attached respectively. An upper beam 26 is installed at the upper ends of these side plates 25, 25. Furthermore, a middle beam 2 is provided in the middle part of both side plates 25.
7 is properly attached by bolts 28... In this case, both side plates 25.25 have a plurality of screw holes 29 on the top.

The mounting position of the middle beam 27, which is arranged in parallel below, can be adjusted upward or downward. Furthermore, a long hole 30... is formed in the middle beam 22, and the adjustment gel) 31.37
This allows fine adjustment of the mounting position of the middle beam 27. A second motor 32 is still attached to the center of this middle beam 27. An eccentric shaft 34 is attached to the tip of the rotating shaft 33 of the second motor 32.

This eccentric shaft 34 is rotatably supported by a bearing 36 pressed by a bush 35. Furthermore, an eccentric collar 37 is attached to the tip of the eccentric shaft 34. A bearing 38 and a casing 39 are mounted on the outer peripheral surface of the eccentric collar 37, respectively. Further, a drive plate 4 which also serves as a bearing holder is fixed to the casing 39 by a plurality of screws 40 . And these eccentric shaft 34, eccentric collar 37,
The bearing 38, the casing 39, and the drive plate 4 form a conversion mechanism 42 that converts the rotational motion of the motor 32 into upward and downward vibrations of the drive plate 4.
□There is still a positioning bit/43 on the tip surface of the eccentric shaft 34.
is provided protrudingly, and a washer 44 in which a plurality of through holes are arranged in parallel in an annular manner is fitted on the tip surface of the eccentric collar 37, and the pin 43 of the eccentric shaft 34 and the through hole of the washer 44 are connected By adjusting the position, the angle between the eccentric shaft 34 and the eccentric collar 37 can be adjusted.

By adjusting the angle between the eccentricity 1 bolt 34 and the eccentric collar 37 in this way, the stroke of the driving plate 4 can be adjusted. Then, by screwing the bolt 45 onto the eccentric shaft 34 while adjusting the angle between the eccentric bolt 34 and the controlling collar 37, the eccentric collar 37 is
It should be noted that 46 is fixed to the eccentric shaft 34.
numeral 47 is a lid body that extends over the conversion orange structure 42, and numeral 47 is a bracket.

The upper end of a shaft 49 is still attached to the lower end of the driving plate 4 by means of a pin 48.

This shaft 49 is supported so as to be movable upwardly and downwardly by a bearing 5 mounted in a bearing case 50, and vibrates upwardly and downwardly together with the drive plate 41. Furthermore, a large diameter portion 52 is formed at the lower end of this shaft 49.

A seven-run section 53 and a tool holder 54 are arranged above and below this large diameter section 52, respectively.

A spacer 55 is inserted between these seven run portions 53 and the tool holder 54, and the flange portion 53, spacer 55, and tool holder 54 are connected to a plurality of screws 56...
The tool holder 54 is attached to the tool holder 54 and is rotatable around the large diameter portion 52 of the shaft 49. Further, a grinding tool 57 is attached to this tool holder 54. This grinding tool 57 is an electric discharge machining electrode used when forming the cavity 24 of the mold 23 by electric discharge machining.
Either a molded body having approximately the same shape as the cavity 24 obtained when the cavity 24 of the mold 23 is formed by wire cutting or a molded body formed by the mold 23 is used. The grinding tool 52 is rotatably supported together with a tool holder 54, and is moved upwardly and downwardly by a drive mechanism 58 formed by the second motor 32, conversion mechanism 42, shaft 49, and tool holder 54. It is designed to vibrate.

Further, a first spring receiver 59 is provided at the lower part of the side plates 25.25, and a second spring receiver 60 is provided on the back plate 5.5 on both sides of the slide plate 4, respectively. And the first of these. A spring (biasing member) 6 is stretched between the second spring receivers 59 and 60. These springs 61
゜61 is Id■ The polishing tool 57 is inserted into the cavity 24 of the mold 23 together with an appropriate abrasive material.
This applies processing pressure between the mold 7 and the mold 23. Note that a long hole 62 is formed in the second spring receiver 6o,
By adjusting the mounting position of the second spring receiver 60 with the screw 63, the processing pressure applied by the spring force of these springs 61, 61 can be adjusted in the range of 10 to 1001.

Next, the grinding operation of the inner surface of the cavity 24 of the mold 23 will be explained. First, the mold 23 is placed on the pull fence and fixed by the mounting members 22. Further, the grinding tool 57 has a grain size of 0.1 to 20μ, for example.
Apply an abrasive such as diamond paste with a thickness of about 100 m.

Then, in this state, the grinding tool 57 is attached to the tool holder 54, and the grinding tool 57 is inserted into the cavity 24 of the mold 23 and positioned. In this case, the grinding tool 57
A predetermined processing pressure is applied between the mold 23 and one side 24a of the inner surface of the cavity 24 of the mold 23 by the spring force of springs 6 and 6. Next, the first. The first motor 18 rotates the table 15 at a rotation speed of about 1 to 60 seconds/rotation, and the second motor 32 rotates the grinding tool 57 by 0.1 seconds/rotation. With a stroke of ~20 mm and 1
Vibrate upward and downward at a rate of about 00 to 4000 times/minute.

Therefore, the grinding tool 57 and the cavity 24 of the mold 23
One side of the inner surface 24 a (!: Spring 61, 6 between O'
1, by vibrating the grinding tool 57 upward and downward while applying a predetermined processing pressure, one side 24a of the inner surface of the cavity 24 that is in contact with the grinding tool 57 due to the diamond paste on the surface of the grinding tool 57 In addition, as the table 15 rotates, the entire inner surface of the cavity 24 of the mold 23 can be brought into contact with the grinding tool 57 in a uniform state, and the entire inner surface of the cavity 24 can be finished with uniform precision. It can be finished with.

Thus, in the structure described above, the machining pressure applied between the grinding tool 57 and the inner surface of the cavity 24 of the mold 23 is maintained constant by the spring force of the springs 61 and 61. Therefore, it is possible to reliably prevent variations in the finishing accuracy of the inner surface of the cavity 24 of the mold 23 depending on the level of skill of the operator, which is the case in the prior art. Further, since the grinding tool 57 is vibrated upward and downward, and the table nozzle 5 is also made to make one rotation sound, the grinding tool 57 can be pressed against the entire inward direction of the cavity 24 of the mold 23 with uniform processing pressure. The entire inner surface of the cavity 24 can be finished with uniform precision.

Note that this invention is not limited to the above embodiments. For example, the 7-run part 53 or the spacer 55 may be formed of an elastic body such as rubber or synthetic resin, and in this case, the inner surface of the cavity 24 of the mold 23 and the grinding tool 5
It is possible to prevent the grinding tool 57, the tool holder 54, the shaft 49, etc. from bending due to the machining pressure applied between the tool holder 54 and the tool holder 54, and to reliably prevent the tool holder 54 from turning idly. , finishing accuracy can be further improved.

〔Effect of the invention〕

According to this invention, while a predetermined processing pressure is applied between the grinding tool and the mold by the biasing force, the grinding tool is vibrated upward and downward, and the table that holds the mold is rotated. This makes it possible to reliably prevent variation in the finishing accuracy of the inner surface of the cavity of the mold, and also to finish the entire inner surface of the cavity with uniform precision.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view showing the entire structure in partial cross section, Fig. 2 is a side view of the same, and Fig. 3 is a sectional view taken along the line T in Fig. 2. , FIG. 4 is a perspective view showing the mold and the grinding tool, and FIG. 5 is a longitudinal sectional view showing the drive mechanism of the grinding tool. 1...Base plate, 4...Slide plate, 7...
- Bearing member, 15... Table, 19... Rotation drive mechanism, 23... Mold, 24... Cavity, 57.
...Grinding tool, 58...Drive mechanism, 6...Spring (
biasing member). Applicant's agent Patent attorney Takehiko Suzue Figure 3 Figure 4

Claims (1)

[Claims] pace plated, a mold comprising a slide plate movable in the horizontal direction on the base plate, a bearing member attached to the slide plate, and a cavity rotatably attached to the bearing member to be ground. a rotary drive mechanism for rotationally driving the table; a rotary drive mechanism disposed above the table and supported to be rotatable in the same direction as the rotation direction of the table; A grinding tool that can be inserted into the cavity, a drive mechanism that vibrates the grinding tool in upward and downward directions, and a drive mechanism that is provided between the slide plate and the base plate so that the grinding tool is inserted into the mold cavity together with an appropriate abrasive material. A mold polishing device comprising: a biasing member that applies processing pressure between the grinding tool and the mold in an inserted state.