KR20030056280A - A Measuring Device Of An Arc Processing Using A Grinder - Google Patents

Abstract

PURPOSE: A measuring apparatus for an arc processing part of a grinder is provided to operate machining and measure a whole range without separating a working piece from a table by installing the measuring apparatus to a Z-axis slider for grinding spherical and non-spherical surfaces as well as a plane surface and transferring the table to a Y-axis slider. CONSTITUTION: A grinder for processing an optical component circularly includes a measuring apparatus(200) and a Y-axis slider(30). The measuring apparatus has a measuring frame, an air cylinder and a measuring sensor. The measuring frame is installed to a Z-axis slider(40). The air cylinder is installed to an upper portion of the measuring frame to move a rod rectilinearly. A bar is connected to an end of the rod including a V-groove plate. The bar is protruded outside after penetrating a lower portion of the measuring frame. The measuring sensor is installed to an end of the protruded bar. A circular working piece(80) is installed to the Y-axis slider. The Y-axis slider makes a table(65) having a work spindle(60) move rectilinearly. A ball socket joint is installed to a connecting portion of the rod and the V-groove plate. A gap between the measuring frame and the V-groove plate is maintained. Thereby, machining and measuring of the circular working piece are not interfered each other.

Description

A measuring device of an arc processing using a grinder

The present invention relates to a measuring device for circular arc processing in a polishing apparatus, and more particularly, a measuring mechanism is installed on a Z-axis slider slide which moves up and down when polishing not only a general plane but also an optical part such as a spherical surface and an aspherical surface. The apparatus for measuring the circular arc processing part of the grinding machine which transfers to the Y-axis slider and simultaneously performs processing and measurement in all areas without removing the circular arc workpiece from the table.

Recently, with the development of the IT industry, various optical components have been developed. Most of these optical components have a spherical or aspherical shape. Four-axis polishing machine is needed for the final process after machining the shape.

Therefore, four-axis polishers have been developed for polishing not only general planes but also optical parts such as spherical surfaces and aspherical surfaces. In the 4-axis grinder, the circular arc workpiece is processed after being fixed to the table once. And in order to measure the size or shape of the circular workpiece, the circular workpiece is separated from the table and measured by the measuring instrument. At this time, when the defect occurs, the arc workpiece is placed on the table again, but it is impossible to fix it correctly at the initial position again. Therefore, since the shape or dimensions of the arc workpieces are distorted, there is a difficulty of polishing again from the beginning.

In the case of a four-axis polishing machine that has been used conventionally, there have been the above problems. Once the circular workpieces that have been fixed on the table are separated after processing, it is hard to think of them again, even if they need to be reworked. It was left to luck after the arc was removed from the table to check whether the arc had the desired shape and dimensions.

In this process, it is impossible to fix the initial position, so it must be processed again from the beginning. In the case of the polishing operation, the processing amount is small, so the probability of defects during machining is increased. Therefore, the operator has a feeling of pressure to precisely process in one process. However, there are many problems in that accurate machining is performed without inspection in precise machining.

Accordingly, the present invention has been made in view of the above-described conventional problems, and the first object of the present invention is to measure the Z-axis slider slide that moves up and down when polishing not only a general plane but also an optical part such as a spherical surface and an aspherical surface. The present invention provides an apparatus for measuring the circular arc processing portion of a grinder, in which a machining and measurement in the entire area are simultaneously performed without moving the arc workpiece off the table by installing a mechanism and moving the table with a Y-axis slider.

In addition, the second object of the present invention is the position that is not affected by the machining during machining, and during the measurement, the reciprocating motion is possible so that the measuring mechanism approaches the circular workpiece, so that the machining and the measurement do not interfere with each other. It is to provide an arc processing unit measuring device.

The object of the present invention consists of a transverse X-axis slider, a vertical Z-axis slider, a tool spindle for rotating the tool, a work spindle for rotating the arc workpiece, and a polishing machine for circularly processing optical components such as spherical surfaces and aspherical surfaces. In

A measuring frame is attached to the Z-axis slider, and an air cylinder for linearly moving the rod is mounted on the upper part of the measuring frame. A bar is connected to one end of the rod with a V-groove plate interposed therebetween, and the bar is placed below the measuring frame. A measuring mechanism which penetrates and protrudes outward, and a measuring sensor is attached to one end of the protruding bar;

It is achieved by the circular arc processing unit measuring device of the grinding machine, characterized in that it comprises a; Y-axis slider for linearly moving the table is equipped with a workpiece spindle for rotating the circular arc workpiece.

And, the connection portion between the rod and the V-groove plate is characterized in that the ball socket joint is provided, between the measuring frame and the V-groove plate to maintain a predetermined interval and one side of the V-groove plate facing the measurement frame Is characterized by having a plane shape.

In addition, a predetermined number of V-grooves are formed below the V-groove plate, and the measuring frame at a position corresponding to the V-groove is provided with a predetermined number of balls paired with the V-groove.

In addition, the lower portion of the measuring unit protruding through the bar is characterized in that the guide ring is attached to serve as a guide to prevent the bar from tilting due to its own weight.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

1 is a perspective view of a circular arc processing unit measuring apparatus of the present invention,

2 is a perspective view of a measuring instrument according to the present invention;

2a is a front view of a measuring instrument according to the invention,

2b is a side view of a measuring instrument according to the present invention;

3 is an exemplary view for explaining a slot-slot-slot structure according to the present invention;

Figure 4 is an exemplary view for measuring the shape and dimensions of the circular arc workpiece through the measuring mechanism according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: 5-axis grinder 20: X-axis slider

30: Y-axis slider 40: Z-axis slider

50: tool spindle 60: work spindle

65 table 70 tool

80: circular arc 90: base

100: pillar 200: measuring instrument

210: measuring frame 220: air cylinder

230: rod 240: coupling

250: Ball socket joint 260: V groove plate

262: V groove 265: ball

270 bar 280 measuring sensor

290: sensor bracket 300: guide ring

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a perspective view of a circular arc processing unit measuring apparatus of the present invention.

As shown in Figure 1, the circular arc processing unit measuring apparatus of the present invention is equipped with a Y-axis slider 30 is a table 65 is capable of linear movement for the measurement as well as polishing the spherical and aspherical shape Measurement can be done simultaneously. The 5-axis grinder 10 includes a horizontal X-axis slider 20, a vertical Z-axis slider 40, a tool spindle 50 for rotating the tool 70 for spherical processing, and a circular workpiece 80. The table 65 to be mounted is composed of a total of five axes consisting of the Y-axis slider 30 to the linear movement and the work spindle 60 is possible to rotate the circular workpiece (80).

The axes configured as described above are provided on the base 90 of the 5-axis grinder 10, and the Y-axis slider 30 is provided on the base plane of the base 90. The Y axis slider 30 has a table 65 linearly moving in the Y axis as shown in FIG. 1, and an arc workpiece 80 is mounted on the table 65, and the arc workpiece 80 is mounted on the Y axis slider 30. Work spindles 60 for rotating the are provided.

A pair of pillars 100 are provided at both sides of the Y-axis slider 30 so that the X-axis slider 20 moves the Z-axis slider 40 in a direction orthogonal to the Y-axis slider 30. Support at a predetermined height. That is, the Z-axis slider 40 which is provided at a predetermined height is mounted with a Z-axis slider 40 which moves up and down linearly so that the Z-axis slider 40 may linearly move in the X-axis direction.

In addition, a tool spindle 50 having a tool 70 for spherical processing is attached to one side of the Z-axis slider 40, and a measuring mechanism 200 having a six-point reciprocating stroke is attached to the other side. have.

The tool 70 attached to the tool spindles 50 rotates for spherical processing of the circular arc workpiece 80 and performs linear movement up and down in the Z-axis direction according to spherical curvature to be processed. At this time, the table 65 on which the circular workpiece 80 is mounted is advanced as much as the vertical downward direction of the tool 70, and processing is performed at this position.

When the initial processing is completed, the table 65 retreats by the vertically downward direction of the measuring device 200 to measure the result. When the measurement result error occurs, the table 65 advances again to enter the reprocessing process.

Hereinafter, the structure and measuring operation of the measuring apparatus 200 according to the present invention will be described in more detail with reference to FIGS. 2, 2A and 2B.

2 is a perspective view of a measuring instrument according to the present invention, FIG. 2A is a front view of the measuring instrument according to the present invention, and FIG. 2B is a side view of the measuring instrument according to the present invention.

As shown in FIGS. 2, 2A, and 2B, the measuring device 200 includes a measuring frame 210 attached to the Z-axis slider 40 and a straight line of the rod 230 on the measuring frame 210. The air cylinder 220 to exercise is mounted. One end of the rod 230 is provided with a coupling 240 and a ball socket joint 250 so that the bar 270 is connected with the V groove plate 260 interposed therebetween. The bar 270 penetrates below the measurement frame 210 to protrude outward, and a measurement sensor 280 is attached to one end of the protruding bar 270 by a sensor bracket 290.

The measuring mechanism 200 is a structure having a six-point reciprocating stroke attached to the Z-axis slider 40. That is, the structure is to move up and down, the measurement mechanism 200 is lowered due to the operation of the air cylinder 220 during the measurement. The same point should always be reached when descending to reduce measurement errors. For this purpose, a slot-slot-slot structure is used, which has a repeatability of several nanometers due to the six-point support.

3 is an exemplary view for explaining a slot-slot-slot structure according to the present invention.

In more detail the slot-slot-slot structure, when one ball 265 lies between the V grooves 262 as shown in FIG. 3, the balls 265 are horizontal to the V grooves 262. Direction and up and down movement is constrained. That is, the pair of balls 265 and the V groove 262 are constrained in two directions. This structure is called two-point support. When such a structure is three pairs, it becomes a slot-slot-slot structure or a structure which restrains all directions by 6 point support.

2, 2a, and 2b, the measurement mechanism 200, which is a fully-constrained mechanism capable of reciprocating stroke using the air cylinder 220, is illustrated using this structure. The measuring device 200 is in an initial position at the time of processing, and the air cylinder 220 at the upper side of the measuring device 200 operates to lower the measuring device 200. At this time, the V-groove plate 260 connected to the rod 230 of the air cylinder 220 descends to the ball 265 fixed to the measuring frame 210 and the V-groove 262 and the ball 265 are In contact, they are constrained in all directions.

The problem to be considered here is that the rod 230 of the air cylinder 220 has its own guide. The complete restraint described above requires only a six-point support, a force pushing from top to bottom, no restraint, and a force like self weight. However, to have a reciprocating stroke, there is an actuator such as the air cylinder 220 and the actuator has its own guides. The guides are again constrained with respect to one direction and due to other constraints, there may be a portion that cannot contact between the balls 265 and the V grooves 262. This will affect the repeatability of the measuring instrument.

In order to solve this problem, it can be solved by using a ball socket joint 250 between the air cylinder 220 and the V-groove plate 260. Due to the use of the ball socket joint 250, the guide of the air cylinder 220 rod 230 is completely free. Therefore, the rod 230 acts only as a downward force due to the ball socket joint 250 and the V-groove plate 260 may contact all of the balls 265, thereby maintaining a high degree of repetition.

However, the use of the ball socket joint 250 enables the rotation of the rod 230 in the axial direction. The V groove plate 260 may rotate by some external force, and the ball 265 touches a portion of the plate without the V groove 262, or the ball 265 may be different from the other V groove 262. If you combine them, you will not be able to maintain repeatability. In order to compensate for this problem, one side of the round V-groove plate 260 is cut and placed on the measuring frame 210 side. And to maintain a proper interval between the measuring frame 210 and the V-groove plate 260. Therefore, the V-groove plate 260 can be rotated only by the interval between the measuring frame 210 and the V-groove plate 260. Since the rotation amount is small, the above-mentioned problem can be solved.

And another problem to consider is that the long bar 270 is tilted by its own weight just before the V-groove plate 260 touches the ball 265. This is because the measurement sensor 280 is eccentrically attached to the bar 270. In this case, when the V-groove plate 260 is in contact with the ball 265, the inclined bar 270 is standing upright and there is an impact and looks unstable. This requires a minimum guide to the bar 270 that is not related to the six point support (without other constraints) and attaches the guide ring 300 as shown in Figs. 2, 2A and 2B to the guide.

When the inner diameter of the guide ring 300 is made larger than the diameter of the bar 270 to fix the position (when the bar 270 is up, that is, supported by six points), the bar ( 270) can be minimized by fixing it in a location that does not touch it. That is, the guide ring 300 does not operate at full restraint and serves as a guide so that the bar 270 does not tilt due to its own weight when the rod 230 is raised.

Figure 4 is an exemplary view for measuring the shape and dimensions of the circular arc workpiece through the measuring mechanism according to the present invention.

As shown in FIG. 4, the measuring device 200 is in a fully restrained state, and the circular workpiece 80 is transferred due to the transfer of the X-axis slider 20, the Y-axis slider 30, and the Z-axis slider 40. All parts of the can be measured. First, the shape and dimension data of the circular workpiece 80 can be obtained through primary measurement before the machining.

And, after the machining is finished, it is possible to re-measure and compare the existing measuring points and obtain information on the amount and shape of the machining. If the desired dimensions are not available, modify the code to the dimensions and remeasure them. By repeating as described above, the circular arc workpiece 80 may be detached from the circular arc workpiece 80 when the circular arc workpiece 80 is once fixed to the table 65 and becomes a finished product.

As described above, according to the circular arc processing unit measuring apparatus of the present invention, the measuring mechanism 200 is installed on the Z-axis slide which moves up and down when polishing not only a general plane but also an optical component such as a spherical surface and an aspherical surface. By transferring the table 65 to the Y-axis slider 30, it is possible to simultaneously measure the machining and the whole area without leaving the circular workpiece 80 off the table 65.

In the process of machining, it is in a position that is not influenced by the machining, and when it is measured, it is possible to reciprocate so that the measuring mechanism 200 can approach the circular workpiece 80, so that machining and measurement are not interfered with each other. It is now possible to provide an arc processing unit measuring device.

In addition, it is possible to lower the defective rate of the circular arc workpiece 80 due to the structure as described above, and also to save the processing time because the inspection of the circular arc workpiece 80 is fixed.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Claims (5)

Spherical surface consisting of the X-axis slider 20 in the horizontal direction, the Z-axis slider 40 in the vertical direction, the tool spindle 50 for rotating the tool 70, the work spindle 60 for rotating the circular workpiece 80, In the polishing machine for arc processing optical parts such as aspherical surface, A measuring frame 210 is attached to the Z-axis slider 40 and an air cylinder 220 for linearly moving the rod 230 is mounted on an upper portion of the measuring frame 210, and at one end of the rod 230. The bar 270 is connected with the V-groove plate 260 interposed therebetween, and the bar 270 penetrates below the measuring frame 210 to protrude outward and is measured at one end of the protruding bar 270. A measuring device 200 to which the sensor 280 is attached; Y-axis slider 30 is mounted to the circular workpiece 80, the Y axis slider 30 to linearly move the table 65 is provided with a work spindle 60 for rotating the circular arc workpiece (80) Arc processing unit measuring device. The apparatus of claim 1, wherein a ball socket joint (250) is provided at a connection portion of the rod (230) and the V groove plate (260). The method of claim 1, wherein the measurement frame 210 and the V-groove plate 260 is maintained at a predetermined interval and the one side of the V-groove plate 260 facing the measurement frame 210 has a planar shape A circular arc processing unit measuring apparatus for a grinding machine. The V-groove 262 of claim 1, wherein a predetermined number of V-grooves 262 are formed at the lower side of the V-groove plate 260, and the V-groove 262 is formed at the measurement frame 210 at a position corresponding to the V-groove 262. Apparatus for measuring the circular arc processing part of the grinding machine, characterized in that provided with a predetermined number of balls (265) paired with. According to claim 1, The bar 270 is characterized in that the guide ring 300 which serves as a guide to prevent the bar 270 is inclined by its own weight is attached to the lower side of the measuring unit protruding Measuring device for arc processing part of the grinding machine.