JPH0212042Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a flat surface polishing device for precisely machining one side of a workpiece.

2. Description of the Related Art Generally, in this type of surface polishing apparatus, a correction ring 1 as shown in FIG. 1 is used to hold a workpiece. This correction ring 1 is equipped with teeth 1b on the lower half of the outer surface of a cylindrical ring body 1a. By driving the correction ring 1 in the forward or reverse direction with the gear 3, the surface plate 2 is corrected and the workpiece to be machined is held.

However, the conventional surface polishing apparatus using such a correction ring has the following drawbacks.

a If the teeth wear out due to meshing with the drive gear, the entire correction ring must be replaced with a new one, even though the wear is only on a part of the teeth, which is uneconomical. be.

b The tooth profile of the correction ring tends to stick to the surface plate, which causes a reduction in machining accuracy.

c It is necessary to move the correction ring to a different position each time when loading or unloading a workpiece.
The weight of the correction ring is very difficult to perform, and moreover, it is difficult to properly engage the drive gear when setting the correction ring into position.

Problems to be Solved by the Invention In view of the above, the problem to be solved by the invention is to make it difficult for the tooth profile of the correction ring to stick to the surface plate, and to replace only the toothed part when the teeth of the correction ring become worn. It is an object of the present invention to provide a surface polishing device which is capable of loading and unloading workpieces while maintaining the meshing state between the correction ring and the driving gear.

Means for Solving the Problems In order to solve the above problems, the surface polishing device of the present invention has a correction ring with teeth on the outer surface placed on a surface plate, and a drive located at the center of the surface plate. The correction ring is meshed with a gear, and while the correction ring is driven by the drive gear, the workpiece accommodated in the correction ring is brought into pressure contact with a surface plate by a pressure plate for polishing, and the correction ring is It is constructed by detachably connecting an annular gear to the upper part of a cylindrical ring main body, and the correction ring is detachably engaged with a pressure plate, and the driving gear is used for loading and unloading of workpieces. It is characterized by being formed long enough to maintain a state of engagement with the correction ring in the raised position of the correction ring.

Operation When loading or unloading a workpiece, the correction ring is connected to the pressure plate, lifted by the pressure plate, and waits at the raised position. At this time, the correction ring maintains its meshing state with the elongated drive gear.

When processing a workpiece, the correction ring is lowered together with the pressure plate, and the workpiece is processed in the same manner as in a conventional surface polishing apparatus.

The correction ring is raised and lowered by the pressure plate while maintaining its meshing state with the drive gear, so there is no need to move it manually.
Moreover, there is no need to mesh the drive gear each time the process is performed.

Effects (a) Since the correction ring is composed of a ring body and a gear that can be separated from each other, only the gear can be replaced when the teeth are worn out, which is very economical.

(b) The correction ring can be formed more easily and at a lower cost than the conventional one in which teeth are provided directly only on the lower half of the correction ring.

c. Since the gear is attached to the upper part of the ring body, scattering of abrasive can be suppressed as much as possible, and there is no risk of tooth profile being formed on the machined surface of the surface plate.

d There is no need to manually move the correction ring each time when loading or unloading a workpiece, resulting in very good workability and safety. Furthermore, since the correction ring is raised and lowered while maintaining its meshing state with the drive gear, there is no need to perform the meshing work with the drive gear each time the correction ring is set at the processing position.

Embodiment In FIG. 2, 10 is a rotatable surface plate connected to a drive source (not shown), and 11 is a correction ring that also serves as a holder for a workpiece placed on the surface plate 10. A ring-shaped gear 13 having teeth 14 on the outer surface is arranged at the upper end of a cylindrical ring body 12, and the ring body 12 and gear 13 are separably connected by a bolt 15. The correction ring 11 is provided with a locking means 16 for connecting to and disconnecting from the pressure plate 17, and by connecting to the pressure plate 17 by the locking means 16, the workpiece can be fixed. The pressure plate 17 is configured so that it can be lifted up to the chain line position during unloading or loading.

In addition, the gear 13 in the correction ring 11
does not necessarily need to be attached to the upper end of the ring body 12, but may be attached so that at least the teeth 14 are located above the lower end of the ring body 12.

Drive gear 18 meshing with the correction ring 11
The device is rotatably fitted to a drive shaft 19 located in the center of a surface plate 10 via a bearing, and can be freely engaged and detached from the drive shaft 19 by a pawl 20. Correction ring 11 when locked
It is configured so that it can be driven in the forward or reverse direction. The drive gear 18 also operates when the correction ring 11 is in the raised position (dash line position) for loading and unloading workpieces.
It is formed to be long in the axial direction to the extent that it can maintain the meshing state with.

In the surface polishing apparatus having the above configuration, when processing the workpiece 21, the workpiece 21 is attached to the block 22, housed inside the correction ring 11, and the block 22 is pressed by the pressure plate 17. The workpiece 21 is brought into pressure contact with the surface plate 10 by. By rotating the surface plate 10 in this state, the workpiece 21 is processed by the surface plate 10 and the surface plate 10 is corrected by the correction ring 11. At this time, if the drive gear 18 is locked to the drive shaft 19 by the pawl 20, the drive shaft 19
9 allows the correction ring 11 to be rotated in the forward or reverse direction.

When the machining is completed, the pressure plate 17 and the correction ring 11 are raised to the position indicated by the chain line in FIG. 2, and the workpiece 21 is taken out and the next workpiece to be machined is loaded. At this time, the correction ring 11
maintains the meshing state with the drive gear 18, so that during the next machining, the pressure plate 17
The correction ring 11 can be set in place by simply lowering the correction ring 11.

When the teeth 14 in the correction ring 11 are worn, only the gear 13 is replaced with a new one.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a conventional example, and FIG. 2 is a sectional view of a main part of an embodiment of the present invention. 10... Surface plate, 11... Correction ring, 12...
Ring body, 13... Gear, 17... Pressure plate, 19... Drive shaft, 21... Work.

Claims (1)

[Claims for Utility Model Registration] A correction ring with teeth on its outer surface is placed on a surface plate, meshed with a drive gear located at the center of the surface plate, and the correction ring is driven by the drive gear. However, in the case where the workpiece housed in the correction ring is pressed against the surface plate by a pressure plate and polished, the correction ring is separated into a ring-shaped gear on the upper part of the cylindrical ring body. The correction ring is releasably locked to the pressure plate, and the drive gear is engaged with the correction ring in the raised position of the correction ring for loading and unloading the workpiece. A flat surface polishing device characterized in that it is formed to be long enough to maintain its condition.