JP2001038593A - Grinding and polishing device and grinding and polishing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of a change of the relative angle of a tool with a work due to wear of a forming tool. SOLUTION: The tool axis M of a forming tool 1 is inclined at an angle θ0 with a vertical axis V0 being the central axis of a work W pressed against a machining surface S0 by a tommy bar 5. The height H of a pivot 8 is regulated such that a pivot 8 (a fulcrum T) being the pivotal moving axis of a tommy bar arm 6 to hold the tommy bar 5 and a straight line N passing the tip of the tommy bar 5 extend vertically to a tool axis M. Even after wear of forming tool 1, an angle between the tool axis M and the central axis of the work W, i.e., a tool relative angle, maintains the inclination angle θ0 of the tool axis M and there is no need to correct the position of the tommy bar 5 or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for processing a component having a spherical shape, such as an optical lens used for a camera, a video, etc. The relative motion between the forming tool and the work by pressing the work (workpiece) against the forming tool and rotating the forming tool, and, in some cases, the tangential swinging motion of a spherical surface on the forming tool or the work. Grinding / polishing method for processing a workpiece by giving
It relates to a polishing apparatus.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for processing a spherical part of this kind, particularly an optical lens, with a mold tool, a processing machine of an inclined axis type as shown in FIG. 6 is used. In this inclined axis type processing machine, the forming tool 101 has a tool axis M set at an inclination angle θ ₀ with respect to a vertical axis V ₀ passing through a spherical center O of a spherical processing surface (tool surface) S _{0. 0} is attached to the main shaft 102 to the rotation center, is in contact with the work surface of the workpiece (workpiece) W ₀ is a lens material.

Then, the work W is held via the holding member 103.
₀ is pressed by the tip ball of the kansashi 105 against the depression on the upper surface of the work holder 104 holding the work W _0.
There are pressed against the working surface S ₀ of the total mold tool 101.

The kansashi 105 is held substantially vertically at one end of the kansashi arm 106, and is fixed to the kansashi arm 106 by adjusting the effective height of the kansashi 105 and fastening a screw 107a. The effective length of the kansashi arm 106 is adjusted by loosening the screw 107b.

The other end of the kansashi arm 106 is a pivot 1
A swing base 109 pivotally mounted at 08 and supporting a pivot 108 is swingable in a horizontal direction on a gantry 110 by a horizontal guide. At the time of swinging movement of the swing base 109 and the kansashi arm 106, the pivot 108
The kansashi arm 106 is configured to be pivotable in the vertical direction about the center.

The link 11 connected to the swing base 109
1 is coupled using a screw 113 at a position eccentric with respect to the center axis of the swing rotation shaft 112. Link 111
The swing base 109 and the screw 11
A circular hole is formed so as to be rotatable with respect to 3.

[0007] In addition to the inclined axis type processing machine, a vertical axis type processing machine in which the main axis of the forming tool is fixed in the vertical direction, and a kansashi is fixed in the vertical direction, the main axis of the forming tool is fixed. Figure 6 shows the fixed tool tub passing through the center of the mold tool.
Various types of processing machines are used, including a ball-swing type processing machine that rotates and oscillates about an axis extending in the front and back directions of the drawing.

[0008] In each of these processing machines, relative motion due to rotation of the forming tool and co-rotation of the work, pressing force of the work on the forming tool by Kansashi, and, in some cases, tangential direction of the work or the forming tool. Grinding and polishing are performed by the swinging motion of
It is processed into a spherical surface with the tool shape reversed.

In the grinding / polishing process by the above-described processing machine, the working surface of the forming tool is worn and the height of the working surface changes with the progress of the working process, so that the relative position between the working tool and the work is corrected. Work is required. Therefore, as described in JP-A-3-117550 (Japanese Patent Publication No. 6-61691), for example, during the manufacture of a spherical lens, the radius of curvature of the processed spherical surface which has been processed up to that point is measured, and A control system that determines the change value of the radius of curvature by comparing the measured value of the radius of curvature of the processed spherical surface and corrects the relative (angle) position between the tool and the workpiece,
Alternatively, depending on the intuition of an expert, for example, in the case of a tilting axis type processing machine shown in FIG. 6, by loosening the screw 107b and re-adjusting the effective length of the kansashi arm 106,
Work was performed to correct the relative angle between the tool and the workpiece to the initial value θ ₀ .

[0010]

However, according to the above-mentioned prior art, as described above, the relative position between the work surface of the forming tool and the workpiece changes as the machining process progresses. A readjustment step is required. Therefore, there has been an unsolved problem that continuous machining cannot be performed until the tool life of the entire mold tool is exhausted due to wear, and the productivity is low and the manufacturing cost of lenses and the like cannot be reduced.

Here, the reason why the relative angle between the tool and the workpiece (hereinafter referred to as "tool relative angle") changes due to the change in tool height due to wear, is a configuration principle diagram of a conventional processing machine. This will be described with reference to FIG.

In FIG. 7, a work W ₀ is held by a work holder 104, and is pressed against a processing surface S ₀ of a forming tool 101 by a screw 105 so as to be freely rotatable. The kansashi 105 is provided by the swing mechanism (the swing base 10 shown in FIG. 6).
9 to the screw 113), and is attached to a kansashi arm 106 pivotally supported on a fulcrum T (pivot 108). The load (pressing force) by a cylinder, spring, weight, or the like (not shown) is applied to the work. convey to W _0.

The forming tool 101 is inclined by an angle θ _{0 with} respect to the vertical axis V ₀ , and is rotated by a motor-driven main shaft 102. The kansashi 105 swings in the direction indicated by the arrow in the figure by the swing mechanism.

At this time, the work W₀ To the mold tool 101
The tip of the kansashi 105 pressed against
The kansashi arm 106 holding 105 performs a rotational movement.
The angle of a straight line N connecting the fulcrum T, which is the center of
The loose arm angle θa is₀ The central axis of the vertical
Axis V₀ Angle of the forming tool 101 with respect to
Relative angle θ₀ Is significantly different from the
Tool axis M of tool 101 ₀ But the fulcrum T and the Kansashi 105
It is not perpendicular to the straight line N connecting the tips. This
When processing a spherical shape with a processing machine with the following configuration principle,
Problems arise.

The arm angle θa and the tool axis M₀ Angle of inclination θ₀ 
Is significantly different from the work W₀ Is processed into N pieces
The mold tool 101 wears by δ and the machining surface S₀ Is the machining surface
S₁When moving to the direction of movement of the tip of Kansashi 105
Is the machining surface S₀ To machining surface S₁Parallel to the direction of travel to
Work W₀ Center axis V of₁ And tool axis of die tool 101
M₀ Tool relative angle is the tool axis M at the start of machining₀ 
Angle of inclination θ₀ From θ ₁ (Θ₀ -Α)
U. That is, a change in the tool height causes the
The relative angle of the tool changes, which results in a half-curvature
The diameter cannot be kept constant.

When a large number of spherical parts are sequentially processed by such a processing machine, the radius of curvature of the product gradually changes.
Therefore, the radius of curvature of each machined part must be accurately measured during production, and the relative position between the tool and the workpiece must be corrected by trial and error based on the result. Such operations require skill and are very difficult and time-consuming for inexperienced workers, which has been a factor in preventing the manufacturing cost of lenses and the like from being reduced.

The present invention has been made in view of the above-mentioned unresolved problems of the prior art, and prevents a change in the relative angle of a tool due to wear of a machined surface of a forming tool. It is an object of the present invention to provide a grinding / polishing method and a grinding / polishing apparatus capable of performing stable continuous processing without performing a work of correcting a position or the like.

[0018]

In order to achieve the above object, a grinding / polishing method according to the present invention is characterized in that a workpiece is pressed against a forming tool by a kanshi held by a pivotable kanshi arm. Rotating the forming tool to process the workpiece, wherein the rotation center axis of the forming tool is substantially perpendicular to a straight line passing through the tip of the kansashi and the pivot axis of the kansashi arm. It is characterized by being.

Further, the grinding / polishing apparatus of the present invention comprises a spherical forming tool, a driving means for rotating the forming tool, a wrench for pressing a workpiece to the forming tool, and The kansashi arm to be held, the kansashi arm support means for pivotally supporting the kansashi arm, and the rotation center axis of the forming tool relative to a straight line passing through the tip of the kansashi and the pivot axis of the kansashi arm. It is characterized by having adjusting means for adjusting it to be vertical.

Preferably, a swing mechanism for swinging the kansashi arm is provided.

The adjusting means may include height adjusting means for changing the height of the pivot axis of the kansashi arm.

[0022] The adjusting means may include a spacer for adjusting the height of the pivot axis of the kansashi arm.

The center axis of rotation of the forming tool may be vertical, and a straight line passing through the tip of the kansashi and the pivot axis of the kansashi arm may be horizontal.

[0024]

[Function] When the angle formed between the tool axis, which is the rotation center axis of the forming tool, and the center axis of the workpiece, that is, the relative angle of the tool, changes due to wear of the working surface of the forming tool, the radius of curvature of the processed product becomes constant. Can not do it. Therefore, by arranging the tool axis of the forming tool so that the tool axis of the forming tool is substantially perpendicular to a straight line passing through the tip of the kansashi pressing the workpiece against the forming tool and the pivot axis of the kansashi arm, the processing surface The tool axis is configured to be parallel to the tangential direction of the circular orbit drawn by the tip of the kansashi due to the abrasion.

Even if the machined surface moves due to wear of the forming tool, the moving direction and the moving amount are almost the same as the moving direction and the moving amount of the tip of the kansashi, so that the tool relative angle hardly changes. Until the tool life of the forming tool is exhausted due to wear, stable continuous machining can be performed.

Even if the machined surface is worn, no modification work such as changing the height of the kansashi arm is required, so that the machining efficiency can be greatly improved and the cost of lenses and the like can be reduced.

[0027]

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

FIG. 1 illustrates a grinding / polishing method according to a first embodiment. The forming tool 1 is inclined with respect to a vertical axis V ₀ passing through a spherical center O of a spherical processing surface S _0. It is attached to the main shaft 2 about the tool axis M, which is the rotation center axis set at the angle θ ₀ , and is in contact with the work surface of the work (workpiece) W, which is a lens material. The main shaft 2 is rotationally driven by a motor as driving means, and rotates the forming tool 1 around the tool axis M. The work W is pressed against the processing surface S ₀ of the forming tool 1 by pressing the recess of the upper surface of the work holder 4 holding the work W by the tip of the kansetsu 5. The kansashi 5 is held substantially vertically at the tip of the kansashi arm 6 via a block 7, and the rear end of the kansashi arm 6 is pivotally connected to a swing mechanism (not shown) by a pivot 8 as a pivot shaft.

The oscillating mechanism is constituted by an oscillating base which is a kansashi arm supporting means for pivotally supporting the kansashi arm 6 by a pivot 8, a link plate for reciprocating the oscillating base in a horizontal direction, and the like. .

As described above, the work W is the work holder 4
, And is pressed against the forming tool 1 by a screw 5 so as to be freely rotatable. The kansashi 5 is a kansashi arm 6 which is pivotable about a pivot 8 as a fulcrum T.
, And transmits a load caused by a cylinder, a spring, a weight, and the like (not shown) to the work W.

The tool axis M of the forming tool 1 is at the center of the workpiece W.
Vertical axis V which is the axis₀ Angle θ ₀Just leaning forward
The motor 5 is rotated while the kansashi 5 is swung.
It swings in the direction of the arrow shown by the mechanism.

At this time, a straight line N passing through the tip of the wrench 5 pressing the workpiece W against the forming tool 1 and the fulcrum T which is the center of the wrench arm 6 holding the wrench 5 pivots, It is configured to be substantially perpendicular to the tool axis M of the forming tool 1.

As a result, the inclination angle of the straight line N, that is, the arm angle θa coincides with the inclination angle θ ₀ of the forming tool 1 set first. In this case, the distance or hairpin arm effective length L between the fulcrum T and the vertical axis V ₀ is the pivot axis of the hairpin arms 6, from a horizontal plane passing through the pivot T to the tip of the hairpin 5 distance or pivot axis The following relationship is established between the Kansashi effective height H that is the height. H = L × tan θa = L × tan θ ₀ (1)

The trajectory drawn by the tip of the kansashi 5 is a circular orbit Nc centered on the fulcrum T. The trajectory moves in a direction tangential to the arc, that is, in a direction substantially parallel to the tool axis M of the forming tool 1, so that the tool wear is reduced. By using δ, the direction and the amount of movement of the spherical center position of the forming tool 1 can be matched with the direction and amount of movement of the tip of the kansashi 5. As a result, tool wear δ
The tool relative angle can always be maintained at a constant value θ ₀ . That is, even if moved to the S ₁ working surface S ₀ of the total mold tool 1 due to wear, the relative position between the workpiece W does not change, the radius of curvature of the working surface S ₁ also can keep the initial value.

As described above, since the grinding and polishing can be continued while the tool relative angle is maintained at a constant value, the machining is not interrupted for adjusting the position of the kansashi and the like until the tool life is over due to wear. Continuous processing is possible.

FIG. 2 is a graph comparing the change in the relative angle of the tool with the value of the arm angle θa when the machined surface of the forming tool is worn out. The relative angle between the tool and the work, that is, the tool relative angle is obtained by geometrically analyzing the positional relationship between the forming tool and the work from the wear amount δ of the tool.

At this time, the inclination angle of the tool axis θ ₀ = 32 °
It is assumed that it is set to the degree.

In the conventional example shown in FIG. 7, the effective length of the arm is about 150 mm, and the effective height of the arm is 74.
Because of the order of mm, arm angle .theta.a is much smaller than the inclination angle theta ₀ tool ^{axis, θa = tan -1 (H /} L) becomes about 26.2 °. The change in the relative angle between the tool and the workpiece (tool relative angle) with respect to the tool wear at this time is shown by a graph A1 in FIG.

As can be seen from the graph A1, the work
The upper limit value (θ ₀ +) of the allowable relative angle, which is a tool relative angle at a level that affects the shape accuracy and habit of the workpiece, with respect to the wear amount δ = 280 μm corresponding to the case of machining 0 pieces.
α ₀ ) °.

Further, .theta.a = 38 ° approximately (i.e., hairpin effective height H = about 117.2Mm) and, even when the arm angle .theta.a had significantly larger set than the inclination angle theta ₀ of the tool, FIG. 2 As shown in the graph C1, the tool relative angle greatly changes with respect to the tool wear, and falls below the lower limit value (θ ₀ −α ₀ ) ° of the allowable relative angle.

When the arm angle θa matches the inclination angle θ _{0 of the} tool axis, that is, the effective arm length L = 15
At 0 mm, if the effective height H = L × tan θa = 93.7 mm is adjusted so that the arm angle θa is about 32 °, the change in the tool relative angle is as shown by the graph B1 in FIG. The value of the tool relative angle hardly changes even if the mold die wears, and the initial value θ ₀ is maintained.

Here, a supplementary description will be given of the change in the tool relative angle when the arm angle θa is slightly shifted from the inclination angle θ _{0 of the} tool axis.

As shown in graphs B2 and B3 in FIG. 2, the arm angle θa = 31 ° (the effective height H of the kansashi is 90.1 m).
m) and 33 ° (Kanzashi effective height H = 97.4m)
m), the change in the relative angle of the tool is small even if the tool is worn, and the allowable relative angle change amount (δ) is 280 μm, which is equivalent to the case where 400 workpieces are machined. ± α ₀ ). That is,
It can be seen that the setting accuracy of the arm angle θa is approximately (θ ₀ ± 1) °.

As described above, when the arm angle θa substantially coincides with the inclination angle θ _{0 of the} tool axis, the relative angle of the tool is kept substantially constant even when the tool is worn. when the arm angle θa than the inclination angle theta ₀ tool axis is large or small, the change amount of the tool relative angle is larger in the form of substantially proportional to the wear amount of the tool.

The inclination of the graph of the tool relative angle with respect to the tool wear amount changes depending on the magnitude of (θa−θ ₀ ).
FIG. 2 also shows that the smaller the absolute value of (θa−θ ₀ ) is, the smaller the change amount of the tool relative angle is.

FIG. 3 shows a grinding / polishing apparatus according to a second embodiment. The forming tool 11 has a spherical processing surface S.
Attached the tool shaft M that is set to the inclination angle theta ₀ with respect to the vertical axis V passing through the spherical center O to the spindle 12 around the contact work (workpiece) W to be processed surface of a lens material are doing. The main shaft 12 is rotationally driven by a motor 13 and rotates the forming tool 11 around a tool axis M. The work W is pressed against the processing surface S of the forming tool 11 by pressing the dent on the upper surface of the work holder 14 holding the work W with the tip of the screw 15. The kansashi 15 is held substantially vertically at the tip of the kansashi arm 16 via the block 17, and the rear end of the kansashi arm 16 is
It is pivotally connected to a swing mechanism 19 by a pivot 18.

The swing mechanism 19 has a swing base 19a supporting the pivot 18 at one end, a rectilinear slide 19b integral with the swing base 19a, a slide guide 19c for guiding the slide 19b in the horizontal direction, and a swing mechanism. Link plate 19d and link 19 for reciprocating the base 19a in the horizontal direction
e, an eccentric cam 19f, a cam retainer 19g, and the like.

As described above, the work W is the work holder 1
4 and pressed against the forming tool 11 by a wrench 15 so as to be freely rotatable. The wrench 15 is attached to a wrench arm 16 which can pivot about a pivot 18 with respect to a swing mechanism 19 around the pivot 18, and applies a load caused by a cylinder, spring, weight, or the like (not shown) to the workpiece W. Tell

The tool axis M of the forming tool 11 is set inside the workpiece W.
Angle θ with respect to vertical axis V which is the central axis ₀Just tilt
And rotated by the motor 13,
Swings in the horizontal direction in the figure by the swing mechanism 19.
You.

At this time, a straight line N passing through the tip of the wrench 15 pressing the workpiece W against the forming tool 11 and the fulcrum T which is the center when the wrench arm 16 holding the wrench 15 pivots, It is configured to be perpendicular to the tool axis M of the forming tool 11.

For this purpose, first, after setting the inclination angle θ ₀ of the forming tool 11, the effective length L of the kansashi arm is determined as follows. A level 16a is mounted in the horizontal direction of the kansashi arm 16, and the height of the kansashi holder 15a is adjusted so that the kansashi arm 16 is horizontal in a state where the position of the swing base 19a is fixed so as not to move. Fix to 17. At this time, the effective length L of the kansashi arm is measured.

Next, in order to match the arm angle θa with the inclination angle θ ₀ of the tool axis M of the forming tool 11, the effective height H is calculated by the above-mentioned equation (1).

The height of holding the kansashi 15 is adjusted so that the kansashi effective height H obtained by the equation (1) is obtained.
It is fixed to the kansashi holder 15a. In general, the arm angle θa before adjustment does not match the inclination angle θ ₀ of the tool axis M. Therefore, the above operation causes the kansashi arm 16 to be no longer horizontal, and the tip of the kansashi 15 to no longer be located on the vertical axis V. At this time, the length of the kansashi 15 is sufficiently long so as to achieve the above object.

Then, the kansashi arm 1 is set by the level 16a.
6 is horizontal and the tip of the kansashi 15 is positioned on a vertical axis V passing through the spherical center of the forming tool 11.
A spacer 20 as an adjusting means is inserted and fixed between 9 a and the arm 16.

By adjusting as described above, the angle between the straight line N and the tool axis M is made to be a right angle, and the moving direction and the moving amount of the tip of the wrench 15 are determined by the tool wear. The direction and amount of movement of the ball center position can be matched.

In the step of processing a spherical shape such as a lens, the forming tool 11 is worn by an increase in the number of processed workpieces W. At this time, the tip of the kansashi 15 is
The tool relative angle between the center axis of the workpiece W and the tool axis M of the forming tool 11 hardly changes, and the angle before the start of machining, that is, the tool axis M the inclination angle theta ₀ can be maintained.

Therefore, without correcting the positional relationship between the workpiece and the forming tool, the relative positional relationship before the tool wear is always maintained, and it is possible to stably process the spherical shape having a constant radius of curvature. is there.

As a result, the productivity of lenses and the like can be greatly improved, and the cost can be reduced.

FIG. 4 shows a grinding / polishing apparatus according to a third embodiment. This is the kansashi arm 26
7 and the fulcrum T on the kansashi arm 26
Arbitrarily adjust the height of the (pivot 28), and
A guide 26c provided with a table 26b, which is an adjusting means (height adjusting means) for adjusting the angle between the fulcrum T and the straight line N passing through the end of the kansashi 25, is provided on the swing base 19a. Also, the kanshishi holder 2 for holding the kanshi 25 so as to have the kanshi effective height H obtained by the equation (1).
Instead of adjusting the height of the set screw 5a, the length of the block bar 27a integral with the block 27 is adjusted to
At 7b, it is fixed to the kansashi arm 26. The block bar 27a is fixed to the block 27, and is slidable through a hole at the tip of the kansashi arm 26 via a bearing member. Since the forming tool 11, the work holder 14, the swing mechanism 19, and the like are the same as in the second embodiment, they are denoted by the same reference numerals, and description thereof is omitted.

First, after the inclination angle θ ₀ of the forming tool 11 is set, the effective length L of the arm and the effective height H of the arm are set in the same manner as in the second embodiment.

Thereafter, the table 26b is moved up and down along a vertical guide 26c attached to the swing base 19a, and the level of the tip of the kansashi 25 is formed while looking horizontally with a level 26a attached to the kansashi arm 26. The height is adjusted so as to be located on a vertical axis V passing through the spherical center of the tool 11. Since the guide 26c is a linear guide using a ball screw, the height can be locked at this position. The guide is not limited to a guide using a ball screw, but may be any means as long as it can be fixed at an arbitrary height by a mechanism for adjusting the position in the vertical direction.

By using such a mechanism, the angle between the straight line N and the tool axis M is adjusted to be a right angle,
The movement of the tip of the kansashi 25 by a very small distance can be matched with the movement of the ball center position of the forming tool 11 due to tool wear.

That is, even if the forming tool 11 is worn out,
The tool relative angle can be kept constant. Also,
Is the inclination angle of the forming tool 11 set first.
Degree θ ₀Matches.

According to the present embodiment, the guide 26c is used as a mechanism for arbitrarily adjusting the height of the fulcrum T.
provided on a, by which it is to adjust the hairpin effective height H determined by equation (1) to be able to adjust the length of the block bar 27a, setting conditions of the inclination angle theta ₀ of the tool shaft M The advantage of being easily adjustable, even in the case of large differences, is added. Other points are the same as in the second embodiment.

FIG. 5 shows a grinding / polishing apparatus according to a fourth embodiment. This is a vertical axis type grinding / polishing device which is disposed vertically without inclining the tool axis M of the forming tool. The straight line N passing through the fulcrum T (pivot 38), which is the center when the kansashi arm 36 holding the kansashi 35 pivots, is perpendicular to the tool axis M (vertical axis V) of the forming tool 11. The configuration is as follows.

When the forming tool 11 wears, the processing surface S moves vertically downward, and the moving direction of the tip of the wrench 35 coincides with the direction in which the spherical center position of the forming tool 11 moves due to tool wear.

That is, the tool axis M of the forming tool 11 is fixed in the vertical direction, and the straight line N passing through the tip of the screw 35 and the fulcrum T is adjusted horizontally. This adjustment is performed by inserting and fixing a spacer 40 for adjusting the height of the fulcrum T between the swing base 19a and the wrench arm 36.

Since the forming tool 11, the work holder 14, the swinging mechanism 19 and the like are the same as those in the second embodiment, they are denoted by the same reference numerals and the description thereof is omitted.

Instead of using the spacers, the mounting height of the forming tool may be adjusted.

In the apparatus shown in FIG. 5, the kansashi 35 and the kansashi arm 36 are held perpendicular to each other. However, as long as the straight line N connecting the tip of the kansashi and the fulcrum is horizontal, the kansashi and the kansashi arm are inclined. It may be.

As described above, since the straight line N and the tool axis M of the forming tool 11 are adjusted to be perpendicular to each other, when the forming tool 11 is worn, the tip of the screw 35 is 11 in a direction substantially parallel to the tool axis M, that is, in the vertical direction, the tool relative angle between the central axis of the workpiece W and the tool axis M of the forming tool 11 hardly changes, and the angle θ ₀ before the start of machining is substantially reduced. Can be maintained.

The other points are the same as in the second embodiment.

[0073]

Since the present invention is configured as described above, it has the following effects.

The machining of the spherical shape can be performed continuously and stably until the end of the tool life, without the need for measuring the machining result or adjusting the machine by a skilled worker during the machining process.

Further, since special tools and jigs are not required, capital investment can be minimized, and the manufacturing cost of lenses and the like can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a grinding / polishing method according to a first embodiment.

FIG. 2 shows a relationship between a tool wear amount and a tool relative angle when machining using the grinding / polishing method according to the first embodiment;
It is a graph shown in comparison with a conventional example.

3A and 3B show a grinding / polishing apparatus according to a second embodiment, wherein FIG. 3A is a plan view and FIG. 3B is an elevation view.

FIG. 4 is an elevation view showing a grinding / polishing apparatus according to a third embodiment.

FIG. 5 is an elevation view showing a grinding / polishing apparatus according to a fourth embodiment.

FIG. 6 is a diagram showing a conventional example.

FIG. 7 is a schematic view showing a processing principle of the apparatus of FIG.

[Explanation of symbols]

 1,11 Mold tool 4,14 Work holder 5,15,25,35 Kansashi 6,16,26,36 Kansashi arm 7,17,27 Block 8,18,28,38 Pivot 9,19 Swing mechanism 9a, 19a Swing base 20, 40 Spacer

Claims (7)

[Claims] A step of pressing a workpiece to a forming tool with a kanshi held on a pivotable kansashi arm and rotating the forming tool to process the workpiece. A grinding / polishing method, wherein a rotation center axis of a mold tool is substantially perpendicular to a straight line passing through a tip of the kansashi and a pivot axis of the kansashi arm. 2. The kansashi is oscillated by an oscillating mechanism connected to the kansashi arm.
The grinding and polishing method described. 3. A spherical shaping tool, a driving means for rotating the shaping tool, a kansashi pressing a workpiece against the shaping tool, and a kansashi arm holding the kansashi,
A kansashi arm support means for pivotally supporting the kansashi arm, and adjusting the rotation center axis of the forming tool to be perpendicular to a straight line passing through the tip of the kansashi and the pivot axis of the kansashi arm. Grinding with adjusting means
Polishing equipment. 4. The grinding and grinding apparatus according to claim 3, wherein a swing mechanism for swinging the kansashi arm is provided.
Polishing equipment. 5. The grinding / polishing apparatus according to claim 3, wherein the adjusting means includes a height adjusting means for changing a height of a pivot shaft of the kansashi arm. 6. The grinding / polishing apparatus according to claim 3, wherein the adjusting means includes a spacer for adjusting a height of a pivot shaft of the kansashi arm. 7. The method according to claim 3, wherein a center axis of rotation of the forming tool is vertical, and a straight line passing through a tip of the kansashi and a pivot axis of the kansashi arm is horizontal. The grinding / polishing device as described.