JP2002331450A - Array shape machining method, its device, metal mold and formed product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an array shape machining method, a device, a metal mold, and a formed product capable of easily and surely positioning a workpiece (a metal mold base material) for machining an array-shaped part in a machining position, causing no positional dislocation when fixing the workpiece, and capable of forming a highly accurate metal mold. SOLUTION: The metal mold base material 1 of the workpiece is placed on a workpiece side fixing jig 11, and is movably supported in the X direction along a main spindle side fixing jig 12 fixed to the main spindle 4 side. The metal mold base material 1 is moved in the X direction by a moving mechanism part 5. A position of a marker 10 is positioned on the rotational axis 3 of a main spindle 4 having a machining tool 6. The workpiece side fixing jig 11 is fixed to the main spindle side fixing jig 12 in a state of restricting the X, Y, Z directions by a draw bar of an unillustrated fixing means. The array- shaped part 2 is machined on the metal mold base material 1 by the machining tool 6 by rotatably driving the main spindle 4 in this state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for molding a precision machined product such as an optical component, and a method and apparatus for machining the mold. The present invention relates to an array shape processing method and apparatus, and a die and a molded product, which can obtain a mold and a molded product with high accuracy, are lightweight, and are firmly formed.

[0002]

2. Description of the Related Art When processing an array of spherical and coaxial aspherical surfaces, as shown in FIG. 6A, a workpiece is processed such that the center of the array surface to be processed coincides with the center of rotation of the main shaft. (Mold base material 1a) is attached to the main shaft, and in this state, the main shaft 4 is rotated, and a tool (not shown) is relatively moved with respect to the die base material 1a, thereby processing the array surface (a). After that, as shown in FIG. 6 (b), the workpiece is moved in the array direction of the array until the center of the array surface (b) to be processed next coincides with the rotation center of the spindle 4. The next array surface (b) is processed, and the array surface (c) is sequentially processed.
There is a method in which the procedure is repeated by moving to (d). In the case of this method, when the main shaft 4 is rotated to perform processing, a holding force that does not displace the mold base material 1a due to rotation or processing resistance is required. However, when moving the mold base material 1a, it is necessary to use a fixing method that does not leave an influence that hinders the movement of the mold base material 1a. Furthermore, a portion of the fixing mechanism that moves together with the mold base material 1a causes a rotational imbalance of the main shaft 4, and is therefore desirably light in weight. As a method for fixing the mold base material 1a, there is a magnet clamp. The magnet clamp is excellent in that the holding force of the mold base material is high, and there is no portion that moves together with the mold base material 1a, and the magnet clamp is lightweight. However, even after the release of the magnet clamp, the mold base material 1a is held on the main spindle side due to the influence of the clamping.
There is a problem that arbitrary movement of a is hindered.

[0003] Also, there is a known technique related to "a processing apparatus, a processing method thereof, and an optical component by the processing method" disclosed in Japanese Patent Application Laid-Open No. 11-179601. This one is
A slide table for mounting a work (a mold base material) is provided on the main shaft, and an array-shaped portion or the like is formed at a predetermined position on the work by moving and positioning the slide table. This is excellent in terms of moving the work, but the part that moves together with the work becomes quite heavy, which makes it difficult to correctly fix and hold the work in a predetermined position, and lowers the positioning and fixing accuracy of the work. There is a point.

[0004]

As described above, in the prior art, the movement and positioning of a workpiece such as a mold base material are not performed smoothly and with high accuracy, and the weight of the moving portion is not reduced. Will be enough. Accordingly, the present invention provides an array shape processing method and apparatus, and a mold and a molded product, which can reduce the weight of a moving portion and secure the work holding, and perform the positioning of a work or the like with high accuracy and smoothly. Aim.

[0005]

In order to achieve the above object, an array shape processing method according to a first aspect of the present invention provides a method of forming a processed part on a surface of a die base material which is a processed product. A processing method for processing a large number of array-shaped portions along the X-direction, wherein the processing method is such that the mold base material can be moved along the X-direction on a main shaft that is driven to rotate.
And positioning in a state where the movement in the Y and Z directions is restricted,
The mold base material is moved in the X direction, and the array-shaped portion processing portion is processed in order to align a plurality of array-shaped portions with the center of the rotation axis of the main shaft. It is characterized in that the mold base material is indirectly held on the main spindle side by meeting the holding tool at the processing site each time by a draw bar provided on the main spindle side. The mold base material moves in the X direction and is positioned at a predetermined position. However, a part of the mold base material that moves together with the mold base material is a member on the holder side. Positioning and fixing are performed by holding the holder by a drawbar.
For this reason, the degree of influence and reduction on the rotational balance due to the reduction in the weight of the moving portion and the holding force can be enhanced, and the array-shaped portion can be processed with high precision.

According to a second aspect of the present invention, in the array shape processing method, the die base material may be moved at a predetermined processing position in the X direction while the movement in the Y and Z directions is restricted by the draw bar. It is characterized by being positioned and fixed to the holder. The mold base material is restrained from moving in the X and Y directions and is fixed at a predetermined position in a shape that is movable only in the X direction, so that the positioning accuracy can be integrated and high precision positioning can be performed.

According to a third aspect of the present invention, in the array shape processing method, the positioning of the die base material in the X direction in the processing part is performed on the die base material in advance corresponding to the processing part. It is characterized by being performed using a marker. The positioning of the mold base material is performed using a marker. High-precision positioning is made possible by simple means.

According to a fourth aspect of the present invention, in the array shape processing method, the positioning of the die base material to a processing part in the X direction may include a positioning moving mechanism that engages with the die base material. It is characterized by being performed using. Since the work is directly performed by the workpiece moving mechanism that engages with the mold base material, positioning can be performed in a short time, and work efficiency can be improved.

The array shape processing apparatus according to the fifth aspect of the present invention is for processing a large number of array shape portions along the X direction for die-forming a processed part on the surface of a die base material. An array shape processing apparatus, comprising: a main spindle provided on a main body of a processing machine; and a main spindle mounted on the main spindle and for holding the mold base material at a predetermined processing position. Holding fixture fixed to the side, a positioning moving mechanism for moving and positioning the mold base material at a predetermined position,
A tool provided at a position opposed to the main shaft for processing the array-shaped portion; and a holding means for holding the mold base material to the holder. Holds the mold base material movably in the X direction while restricting the movement of the mold base material in the Y and Z directions, and moves the processing portion of the array shape portion of the mold base material to the main shaft. The holding means comprises a drawbar arranged on the main shaft side and removably engaged with the holding tool.
It is characterized in that the mold base material is fixed to the holder side at a processing portion along a predetermined X direction by a closing operation. The member that moves together with the mold base material is lightweight, has little influence on the rotational balance, and can be reliably and firmly fixed by the drawbar. In addition, since the mold base material is not fixed directly to the main shaft, but is fixed via a holder, there is no deviation of the mold base material during fixing,
In addition, it can be firmly fixed to the spindle side.

Further, in the array shape processing apparatus according to the present invention, preferably, the positioning and moving mechanism section is provided on the die base material side in advance so as to correspond to the processing portion; It is characterized by comprising a marker position detecting device for detecting a position, and a moving mechanism for moving the mold base material in the X direction. High-precision positioning can be performed because of positioning using a marker.

According to a seventh aspect of the present invention, in the array shape processing apparatus, the positioning and moving mechanism moves the mold base material in the X direction. And a position detecting unit for detecting the amount of movement and positioning the mold base material at a predetermined processing site. Since the position of the mold base material is determined by detecting the amount of movement of the moving mechanism, highly efficient positioning can be performed.

The array shape processing apparatus according to the present invention is characterized in that the drawbar is arranged on a rotation axis of the main shaft. Since the drawbar is arranged in line with the rotation axis of the main shaft, strong and stable holding can be achieved.

[0013] The mold according to the ninth aspect is the first aspect of the invention.
An array shape processing method according to any one of claims 1 to 4, or
It is processed by an array shape processing apparatus according to any one of claims 5 to 8. This mold base material is a mold manufactured using the above-described array shape processing method and processing apparatus, and is made of a high-precision one.

Further, the molded product according to claim 10 is
A processed product formed by the mold described above,
It is formed with high precision and can be made relatively inexpensively.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, the overall structure of an array shape processing apparatus 100 according to the present invention will be described with reference to FIG. The main shaft 4 is supported by the processing machine body 9 so as to be rotatable around the rotation shaft 3. On the other hand, the mold base material 1 is located at a position facing the main shaft 4.
Is provided with a processing tool 6 for processing the array-shaped portion 2, and the processing tool 6 is attached to a processing machine main body 9 via a tool base 7.
It is movably supported by Y and Z.

The mold base material 1 is held by a holder 14, and the holder 14 is mounted on the main shaft 4 side. Further, a positioning moving mechanism 15 for positioning the mold base material 1 in the X direction is arranged near the holder 14. Although not shown in FIG. 1, a fixing means 16 (FIG. 4) for positioning and fixing the mold base material 1 at a predetermined position is provided on the main shaft 4 side. With the above-described configuration, the mold base material 1 is sequentially positioned at the processing position of the array-shaped portion 2 at a position coincident with the rotating shaft 3, and the array-shaped portion 2 is sequentially processed by the rotation of the main shaft 4 and the processing tool 6. . In FIG. 1, a processing tool for cutting is shown as the processing tool 6, but the processing tool may be a grindstone 21 shown in FIG. 2, and the grindstone 21 is formed by a grindstone spindle 22 and a tool stand 23 on the processing machine body 9 side. It is arranged in.
Of course, the grindstone 21 is also movable in the X, Y, and Z directions.

Next, the structure of the holder 14 will be described with reference to FIGS. 1, 3, 4A and 4B. The holder 14 includes a workpiece-side fixing jig 11 on which the mold base material 1 as a workpiece is placed, and a spindle-side fixing jig 12 fixed to the spindle 4 side.
The spindle-side fixing jig 12 includes a pair of opposing piece-shaped members 12.
The pieces 12a are arranged along the X direction, and the central axis between the pieces 12a is aligned with the diameter of the main shaft 4. On the inner surfaces facing each other, inclined surfaces 12b, 12b for forming a taper that reduces in size toward the main shaft 4 are formed. On the other hand, the workpiece-side fixing jig 11 has the inclined surfaces 12 b and 12
The outer surface of each of the inclined surfaces 11b, 11b is formed so that the inclined surfaces 11b can be simultaneously slidably supported by the main spindle side fixing jig 12 in the X direction. In addition, the inside of the work-side fixing jig 11 has a gap groove 1 along the X direction.
1a is formed, and the gap groove 1a is provided substantially at the center of the gap groove 11a.
A through portion 11c communicating with 1a is formed. Also,
As described above, the mold base material 1 is placed on the upper surface of the workpiece fixing jig 11.

In this embodiment, two types of the positioning and moving mechanism 15 are described, but the present invention is not limited thereto. The positioning and moving mechanism unit 15 of the embodiment includes a marker 10 formed in advance on the surface of the mold base material 1, a marker detection device 6 for detecting the position of the marker 10, a mold base material 1 And a moving mechanism section 5 for moving the object along the X direction. The marker 10 indicates a processing position of the array-shaped portion 2 of the mold base material 1. As shown in FIG. 1, the marker detecting device 6 is movably supported on the processing machine body 9 side along the X, Y, and Z directions. The moving mechanism 5 is formed so as to be movable along the X direction, and the tip of the moving part can be brought into contact with the side surface of the workpiece-side fixing jig 11 on which the mold base material 1 is placed. Are located in The other positioning and moving mechanism 15 includes the moving mechanism 5 described above and a position detector (not shown) for detecting the amount of movement of the moving mechanism 5 in the X direction.

The fixing means 16 can be of various types, but in this embodiment, it comprises a drawbar 13 and a drawbar operating mechanism for operating the drawbar 13. The drawbar 13 is arranged along the rotation axis 3 of the main shaft 4, and is arranged to be able to move up and down along the Z direction (direction of the rotation axis 3). The head 13a of the drawbar 13 is disposed in the gap groove 11a of the work-side fixing jig 11, and its "chin" is detachably engaged with the work-side fixing jig 11 forming the gap groove 11a. It consists of a structure. Head 1
The shaft portion 13b connected to 3a penetrates the through portion 11c of the work-side fixing jig 11, and is connected to the drawbar operating mechanism (not shown).

As shown in FIGS. 4A and 4B, when the draw bar 13 is actuated to engage the work-side fixing jig 11 with the above structure, the work-side fixing jig 11 is tilted. The surface 11b is pressed against the inclined surface 12a of the piece-shaped member 12a of the spindle-side fixing jig 12, and the workpiece-side fixing jig 11 is fixed at a predetermined position in the X direction while being restricted in the Y and Z directions. On the other hand, when the operation of the drawbar 13 is released, the gap groove 1 is opened.
Since the head 13a of the drawbar 13 becomes free within 1a, the workpiece-side fixing jig 11 is in a free state in which it can move along the X direction. That is, the mold base material 1 can be moved to an arbitrary position along the X direction, and the main shaft 4 is restrained in the X, Y, and Z directions by the operation of the draw bar 13 at a desired position.
Will be fixed to the side.

Next, the array shape processing apparatus 100 of the present invention
An array shape processing method using the method will be described. In addition,
In the following description, a case where the marker 10 is used as the positioning and moving mechanism 15 will be described. First, the rotating shaft 3 of the main shaft 4 and the processing tool 6 are matched. The moving mechanism 5 is operated to move the workpiece-side fixing jig 11 in the X direction while guiding the workpiece-side fixing jig 12 to the spindle-side fixing jig 12, and the array-shaped portion 2 is fixed to the rotation axis 3, that is, the position of the spindle 4. Match to the center point. FIG. 5A shows this state, and shows the n-th array shape portion 2 already processed. Then, n
The processing of the + 1st array-shaped portion 2 is performed as follows. That is, as shown in FIG. 5B, the moving mechanism 5 is applied to the workpiece-side fixing jig 11, and is moved along the X direction. Of course, in this case, the drawbar 13 is
It is in a free state as shown in FIG. The marker 10 corresponding to the (n + 1) th position is detected by the marker position detecting device 8, and the workpiece-side fixing jig 11 and the mold base material 1 are moved to that position. This state is shown in FIG. Here, when the draw bar 13 is operated, the workpiece-side fixing jig 11 is fixed to the spindle-side fixing jig 12 with the X, Y, and Z directions fixed. Here, the (n + 1) -th array shape part 2 is processed by rotating the main shaft 4 to engage the processing tool 6 with the marker 10 (n + 1 position) of the mold base material 1. Hereinafter, by repeating the same operation, the entire processing of the array-shaped portion 2 of the mold base material 1 can be completed.

In the above description, the positioning and moving mechanism 15 uses the marker 10, but the position detecting device detects the amount of movement of the moving mechanism 5 without using the marker 10, and thus the position detecting device 15 is almost the same as the above. Similar array shape part 2
Can be processed.

In the above description, the case where the array-shaped portion 2 is processed using the processing tool 6 for cutting has been described. However, the processing may be performed using the grindstone 21 shown in FIG. 2 as described above. In addition, it goes without saying that well-known techniques other than the mechanism described above are appropriately applied as applied techniques of the present invention.

[0024]

According to the array shape processing method of the first aspect of the present invention, the workpiece is fixed by attracting the die base material with a draw bar, so that the workpiece can be fixed with a high holding force. Also, unlike the magnet clamp, even after the fixation is released, the work is not held on the main shaft due to the influence of the fixation, so that the work can be easily moved. In addition, since the moving part is lightweight only with the workpiece and the workpiece fixing jig on the workpiece side,
Since the influence on the rotation balance is small, high-precision array shape processing can be performed. 2) According to the array shape processing method of claim 2 of the present invention,
When the workpiece is fixed, the taper shape allows alignment in two directions perpendicular to the array of workpieces,
It is possible to easily and accurately position a workpiece in a short time. Also, by combining in a tapered shape,
The workpiece can be fixed to the spindle with high holding force. 3) According to the array shape processing method of claim 3 of the present invention,
Since the positioning of the workpiece is performed using the positioning marker formed on the workpiece, accurate positioning of the workpiece can be performed. 4) According to the array shape processing method of claim 4 of the present invention,
Since the positioning of the workpiece is performed according to the set value of the workpiece moving mechanism, the positioning of the workpiece can be performed in a short time without adding a special mechanism. 5) According to the array shape processing apparatus of claim 5 of the present invention,
By using the processing apparatus having the function described in claim 5, array shape processing can be performed. 6) According to the array shape processing apparatus of claim 6 of the present invention,
By using the marker position detection device, accurate positioning of the workpiece can be performed, and thus array shape processing excellent in pitch accuracy can be realized. 7) According to the array shape processing apparatus of claim 7 of the present invention,
Since the workpiece has a tapered shape, the workpiece can be fixed, and at the same time, can be aligned in two directions perpendicular to the array direction of the workpiece. Further, the workpiece can be fixed to the main shaft with a high holding force by the taper. 8) According to the array shape processing apparatus of claim 8 of the present invention,
Since the rotation axis of the main shaft and the draw bar are coaxial, even if the workpiece rotates under the influence of the draw bar at the time of clamping, the center of the array does not deviate from the rotation axis of the main shaft, so that there is no error in the array pitch. 9) According to the mold of the ninth aspect of the present invention, a mold having a highly accurate array-shaped portion is formed. 10) According to the molded product of claim 10 of the present invention, a molded product such as a high-precision optical component is formed because a high-precision mold is used.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing the entire structure of an array shape processing device of the present invention.

FIG. 2 is a partial perspective view showing a processing tool using a grindstone.

FIG. 3 is an enlarged partial perspective view showing a detailed structure of main components of the array shape processing apparatus of the present invention.

FIG. 4 is a cross-sectional view (Y, Z cross section (a)) and (X, Z cross section (b)) showing the holder and the fixing means in the present invention.

FIG. 5 is an explanatory view ((a) to (c)) for explaining the array shape processing method of the present invention.

FIG. 6 is a schematic plan view for explaining a conventional method of processing an array-shaped portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold base material 2 Array shape part 3 Rotation axis 4 Main shaft 5 Moving mechanism part 6 Processing tool 7 Tool stand 8 Marker position detection device 9 Processing machine main body 10 Marker 11 Work side fixing jig 11a Void groove 11b Slope 11c Penetration Part 12 Main spindle side fixing jig 12a Piece-shaped member 12b Inclined surface 13 Drawbar 13a Head 13b Shaft part 14 Holder 15 Positioning and moving mechanism 16 Fixing means 21 Grinding wheel 22 Grinding wheel spindle 23 Tool table 100 Array shape processing device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G02B 3/00 G02B 3/00 Z F-term (Reference) 3C045 CA18 FA08 3C049 AB04 AB08 AB09

Claims (10)

[Claims] 1. A processing method for processing a large number of array-shaped portions for molding a workpiece on a surface of a mold base material as a workpiece along the X direction. Positioning the mold base material on the driven spindle so as to be movable in the X direction and in a state where movement in the Y and Z directions is restricted, and moving the mold base material in the X direction. A plurality of array-shaped portions are processed while sequentially aligning the array-shaped portion processing portion with the center of the rotation axis of the spindle, and the aligned mold base material is disposed on the spindle side each time. An array shape processing method, wherein a holding tool is met each time at a processing portion by a provided draw bar and is indirectly fixed to a main shaft side. 2. The mold base material is positioned and fixed to the holder at a predetermined processing portion in the X direction while the movement in the Y and Z directions is restricted by the draw bar. 2. The array shape processing method according to 1. 3. The method according to claim 1, wherein the positioning of the mold base material in the X-direction is performed using a marker previously formed on the mold base material corresponding to the work area. 2. The array shape processing method according to 1. 4. The method according to claim 1, wherein the positioning of the mold base material in the processing region in the X direction is performed using a positioning moving mechanism that engages with the mold base material. Array shape processing method. 5. An array shape processing apparatus for processing a plurality of array-shaped portions for forming a processed part on the surface of a die base material as a workpiece along the X direction. The apparatus includes a spindle provided on a processing machine main body side, a holder mounted on the spindle, and fixed to the spindle side to hold the mold base material at a predetermined processing position; and A positioning and moving mechanism for moving and positioning the mold base material to a predetermined position; a processing tool for processing the array-shaped part disposed at a position opposed to the main shaft; and holding the mold base material And holding means for holding the mold base material in the X direction while restraining movement of the mold base material in the Y and Z directions. Then, the processing part of the array shape part of the mold base material is set on the rotation axis of the main shaft. The holding means is comprised of a drawbar disposed on the main shaft side and removably engaged with the holder, and the mold base is opened and closed by opening and closing the drawbar. An array shape processing apparatus, comprising: a member that is fixed to a side of the holder at a processing portion along a predetermined X direction. 6. A marker provided in said mold base material side in advance corresponding to said processing portion, a marker detecting device for detecting a position of said marker, said mold base material, 6. The apparatus according to claim 5, further comprising: a moving mechanism for moving the object along the X direction. 7. A moving mechanism for moving the mold base material in the X direction, wherein the positioning and moving mechanism section detects a moving amount of the moving mechanism section and performs predetermined processing on the mold base material. 6. The array shape processing apparatus according to claim 5, further comprising a position detection unit for positioning at a site. 8. The array shape processing apparatus according to claim 5, wherein the drawbar is arranged on a rotation axis of the main shaft. 9. An array shape part forming method, wherein the array shape processing method is performed by the array shape processing method according to any one of claims 1 to 4, or the array shape processing apparatus according to any one of claims 5 to 8. Mold. 10. A molded product formed by the mold according to claim 9.