JP2001322012A - Mounting holder for cutting tool and position adjusting device for cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize non-production time for a working device, to eliminate skillfulness for adjusting a cutting tool, to easily perform an accurate adjustment of the cutting tool by even a beginner and to prevent damage of the cutting tool, a work and peripheral jigs in accompany with the adjusting work. SOLUTION: This is the mounting holder for the cutting tool with mounted cutting tool 1a for rough working and cutting tool 1b for finish working. The mounting holder is provided with a first holder member 2a with the fixed cutting tool 1a for rough working, a second holder member 2b with the fixed cutting tool 1b for finish working and a mounting holder main body 3 for attachably/ detachably supporting the first holder member 2a and the second holder member 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holder for a cutting tool and a position adjusting device for the cutting tool in a processing apparatus for cutting a metal, ceramics, resin material, or the like by a cutting tool.

In particular, the present invention relates to a process for cutting a cylindrical outer diameter of a developing sleeve and a photosensitive drum used in an image forming apparatus such as a copying machine and a laser beam printer, a surface of a memory disk for electronic equipment, and a surface of a scanner mirror. For example, the present invention is suitable for a fly-cut processing step and a processing apparatus that require high-precision mirror surface quality.

[0003]

2. Description of the Related Art The prior art will be described below with reference to an example of a fly-cut cutting method for a mirror surface of a rotating polygon mirror for image reading used in an electrophotographic machine.

[0004] Each mirror surface of the rotary polygon mirror is mirror-cut by fly cutting using a diamond tool attached to a hydrostatic bearing rotating at high speed.

[0005] In general, flatness λ / 5 (λ = 63
2.8 nm), and a mirror surface accuracy of about Rmax 0.02 μm is required.

[0006] Further, in order to reduce the unit cost of parts, it is required that the above-mentioned mirror finishing is completed in one pass.

The current standard mass production processing conditions are as follows.

Roughing bit: Sintered diamond Finishing bit: Single crystal diamond Bit holder rotation speed: 2400 rpm Processing feed rate: 0.8 mm / s (= 0.02 mm / re)
v) The dimensions and materials of the standard work are as follows.

Diameter of circumscribed circle: φ40 mm Thickness: 4 mm Number of faces: 6 Material: Al alloy for mirror finishing When performing high-precision mirror cutting in one pass, the purpose of minimizing the deformation of the work due to the cutting force and the finished surface For the purpose of minimizing the cutting depth of the finishing tool that affects the roughness, the two tools, rough and finished, are opposed to the center of rotation on the tool mounting holder (hereinafter referred to as the tool holder).
In some cases, simultaneous machining may be performed in parallel with a position where a rough machining tool is ahead of the workpiece feeding direction. In the fly-cut method in which the tool is rotated at a high speed to perform cutting, in order to prevent vibration due to eccentricity, the weight of each of the rough and finished cutting tools is adjusted to be the same, and the dynamic balance is adjusted.

When performing one-pass machining with two coarse and finished bits, it is necessary to accurately adjust the absolute value and relative value of the protrusion amount of each of the coarse and finished bytes.

That is, the absolute value of the amount of protrusion of the finishing tool directly affects the finished dimension in the case of one-pass machining, and the relative difference between the amount of protrusion of the roughing tool and the amount of protrusion of the finishing tool is the finishing tool. If the cutting amount of this finishing bit is too large, the cutting force of the finishing bit will increase and the work will be deformed, and if the chips generated from the finishing bit increase in thickness and come into contact with the machined surface, Due to scratching, good shape accuracy and finished surface roughness cannot be obtained.

A rotary polygon mirror used in an electrophotographic machine is manufactured by mirror-cutting an aluminum alloy. The cutting depth is adjusted to about 50 μm for a coarse cutting tool and 10 μm or less for a finishing cutting tool. Further, with the recent increase in definition of images, it has been required to improve the flatness of the mirror surface. In this case, the cut amount of the finishing bit has been adjusted to 5 μm or less. An adjustment error of about ± 1 μm is required.

[0013]

Conventionally, when adjusting the amount of protrusion of a pair of rough and finished bits, the processing device is stopped, the bits are temporarily fixed, and trial processing is performed in the temporarily fixed state. Then, a method of measuring the machined surface dimensions of each of the finishing tools has been adopted. Since adjustment is repeatedly performed until the measured processed surface dimension reaches a predetermined value, it takes an adjustment time, and the non-production time of the processing apparatus becomes longer, which causes a decrease in productivity in a mass production factory. In addition, since the adjustment requires skill, there is a problem that the difference in the skill level of the operator causes a large difference in the adjustment time, and the operating state of the processing apparatus varies.

If the amount of protrusion of the cutting tool is significantly larger than a predetermined value at the time of the first trial cutting after the temporary fixation, a large cutting force is applied to both the cutting tool and the work, so that the cutting tool, the work and the work are mounted. In some cases, the holders that were used could be damaged. In addition, when finely adjusting the amount of protrusion, the work of inserting and removing the shank by loosening the tool shank fixing screw to the tool mounting holder is performed. Accidents that damaged the blade edge were also frequently encountered.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to minimize the non-production time of a processing device, eliminate the skill required for adjusting a cutting tool, and make it easy for even a beginner to use a cutting tool. The purpose of the present invention is to perform precise adjustment of the tool, and to prevent damage to the cutting tool, work, and peripheral jigs due to the adjustment work.

[0016]

Means for Solving the Problems To solve the above-mentioned problems,
In order to achieve the object, a cutting tool mounting holder according to the present invention is a cutting tool mounting holder to which a roughing cutting tool and a finishing processing cutting tool are mounted. The first where the tool is fixed
, A second holder member to which the cutting tool for finishing is fixed, and a mounting holder body that detachably supports the first holder member and the second holder member. It is characterized by:

Further, in the cutting tool mounting holder according to the present invention, the rough cutting tool is fixed to the first holder member so as to be adjustable in position, and the finish cutting tool is fixed. Is characterized in that it is fixed to the second holder member so that the position can be adjusted.

In the holder for a cutting tool according to the present invention, a fixing position of the cutting tool for rough machining with respect to the first holder member and a fixing position of the cutting tool for finishing with respect to the second holder member. The fixed position is adjusted outside the cutting device.

Further, in the holder for a cutting tool according to the present invention, a first assembly in which the rough cutting tool is mounted on the first holder member, and a finishing process on the second holder member. And an adjusting means for adjusting the weight of the second assembly to which the cutting tool is attached so as to be substantially the same.

The position adjusting device for a cutting tool according to the present invention comprises a first holder member to which a cutting tool for rough machining is fixed so as to be adjustable in position and a cutting tool for finish machining fixed to be capable of being adjusted in position. For adjusting the position of the cutting tool in the mounting holder of the cutting tool, comprising a second holder member to be mounted and a mounting holder body that detachably supports the first holder member and the second holder member. A position adjusting device for a cutting tool, wherein the first holder member temporarily fixed to the roughing cutting tool,
A stage for mounting a second holder member to which the cutting tool for finishing is temporarily fixed, and an enlargement for observing the tip of the cutting tool for roughing and the tip of the cutting tool for finishing. An optical system, the cutting tool for rough machining is attached to the first holder member so that a tip position of the cutting tool for rough machining and a tip position of the cutting tool for finishing machining have a desired positional relationship. And position adjusting means for adjusting the position of the cutting tool for finishing with respect to the second holder member.

Further, in the position adjusting device for a cutting tool according to the present invention, the magnifying optical system includes a television camera.

In the position adjusting device for a cutting tool according to the present invention, the position adjusting means adjusts the position by contacting portions other than the cutting edges of the rough cutting tool and the finishing cutting tool. And a position adjusting member for the purpose.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below.

In the present embodiment, the protrusion amount is not adjusted while the cutting tool is attached to the processing machine as described in the prior art, and the pair of detachable and detachable tool holders (hereinafter referred to as parent holders) are removed. (Hereinafter referred to as a child holder) is provided so that a coarse and finished bite can be mounted on each child holder. The adjustment work on the processing machine can be abolished by attaching the child holder, which has been adjusted to the predetermined amount of protrusion in advance on the adjustment device installed outside the processing machine, to the parent holder, thus eliminating the need for processing on the processing machine. Time can also be reduced.

The amount of protrusion of the bite of each of the pair of child holders is measured by a magnifying optical system to measure the distance from the reference surface provided on the child holder to the cutting edge on the adjusting device, and the bite is moved to the target position by the bite shank fine movement mechanism. By moving, adjustment accuracy and adjustment reproducibility of 1 μm or less can be obtained.

In order to prevent the vibration accompanying the high-speed rotation, each child holder is provided with a set screw for adjusting the weight so that the weight of each child holder can be matched. Similarly, for each of the coarse and finished cutting tools, a set screw for adjusting the weight can be attached to the cutting tool shank.

Hereinafter, a specific description will be given with reference to the drawings.

(First Embodiment) FIG. 1 is an overall view of a fly-cut type tool holder according to an embodiment of the present invention.

In FIG. 1, a cutting tool 1a for rough machining and a cutting tool 1b for finishing are mounted on child holders 2a and 2b, respectively. The child holders 2a, 2b are attached to positions substantially opposite to the parent holder 3. The parent holder 3 is centered and attached to the tool rotation shaft 4. When replacing a byte, be sure to remove the old one, then attach a new one and adjust the amount of protrusion. The procedure at this time will be described in detail below.

First, the tool rotation shaft 4 is stopped, and the child holders 2 a and 2 b with the old cutting tools are removed from the parent holder 3. FIG. 2 shows the removed child holders 2a and 2b. Loosen the screws fixing the old cutting tools 1a, 1b and remove 1a, 1b. Next, a new bite 1 that has been adjusted to match the weight with set screws in advance
a ', 1b' (the same shape as the old cutting tools 1a, 1b) are temporarily fixed to the respective child holders 2a, 2b and attached to the cutting tool protrusion adjusting device 100 (see FIG. 3). The weight deviation can be made sufficiently small by shaving the set screws to be attached.
The weight deviation of b 'was 0.005 g or less.

FIG. 3 shows an overall schematic configuration of the bite protrusion amount adjusting device 100.

In FIG. 3, the child holders 2a and 2b are fixed to a child holder mounting jig 101 mounted on xy slides 102 and 103 of the adjusting device 100. FIG. 4 is an enlarged plan view and a left side view of the periphery of the child holder mounting jig 101, and FIG. 5 is a lower side view thereof. Child holders 2a, 2
b is attached so as to sandwich the reference gauge 110 on the adjusting device 100. After the attachment, the tool pressurizing jig 109 is moved forward (to the right in the drawing) and brought into contact with the front face of the tool shank. The contact portion is not the diamond tip portion T but the relief portion on the front surface of the shank (see the enlarged view of the contact portion in FIG. 5).

A spring-loaded screw is used for the contact portion of the tool pressurizing jig 109 with the front surface of the tool shank, and several tens of grams are used.
Is applied to the bite shank. Next, the edge of the front end (left end in FIG. 4) of the reference gauge 110 is observed by the magnifying optical system 104, and the vertical hairline 1 provided at the center of the visual field of the magnifying optical system as shown in FIG.
The edge portion is made to coincide with 11. This reference gauge 11
The dimension H from the child holder mounting reference plane M of 0 to the front edge portion substantially matches the protrusion amount of the standard finishing tool.

With the jig × slide 103 fixed at a position where the periphery of the cutting edge of the finishing tool 1b ′ can be observed, the jig y
The slide 102 is moved. Next, loosen the bite fixing screw, and finish the cutting bit 1b '
The finishing bit 1b 'is finely moved by the micrometer 108 so as to be at the position of No. 11. When the cutting edge matches the vertical hairline 111, the cutting tool fixing screw is tightened to complete the adjustment of the finishing tool 1b '.

Subsequently, the y slide 102 is moved so that the cutting edge of the coarse cutting tool 1a 'can be observed by the magnifying optical system. Here, the jig × slide 103 is moved (to the left in FIG. 4) for the first time by the cut amount of the finishing bite. The value of the coordinate display unit 106 is read for the movement amount. Next, the coarse tool 1a 'is slightly moved by the micrometer head 107 so that the cutting edge of the coarse tool 1a' comes to the vertical hairline position in the visual field of the enlarged optical system. At the position where the cutting edge and the vertical hairline coincide, tighten the bite fixing screw to set the coarse bite 1
a ′ is fixed, and a series of protrusion amount adjustment work is completed.

The bytes 1a ', for which the protrusion amount adjustment has been completed,
The child holders 2a, 2b with the attached 1b 'are detached from the mounting jig 101 and restored to the parent holder 3 attached to the tool rotating shaft of the cutting machine, and the bite replacing operation is completed.

The reproducibility of attaching the child holder pair to the parent holder was measured. A plurality of workers remove and mount the rough work bit and the child holder pair, which adjust the protrusion amount of the finish bit so that the cutting depth of the finish bit becomes 5 μm, and cut the test work piece.
The processing was stopped in the middle of cutting, and the level difference of the cut surface due to the roughing and finishing bits formed on the test workpiece surface was measured. This level difference directly affects the mirror cut quality with the substantial cutting depth of the finishing bit,
Even when the pair of child holders was repeatedly attached and detached, the variation in the level difference was 1 μm or less.

(Second Embodiment) In order to further simplify the work of adjusting the amount of protrusion of the cutting tool, a CC
FIG. 7 shows an example using a D camera. The visual field of the TV monitor is observed instead of looking through the eyepiece of the optical microscope of the first embodiment. The coordinates of the jig x y slide are also displayed on the TV monitor. The method of aligning the reference gauge and each cutting edge with the hairline in the field of view is the same as in the first embodiment, but the depth of focus of the magnifying optical system is deeper than in the first embodiment of the optical microscope type, and observation with a TV monitor Therefore, the operator's day fatigue is small and the observation work is easy.

As described above, according to the above-described embodiment, it is possible to replace and adjust a diamond tool used for precision mirror surface cutting such as a rotary polygon mirror for an electrophotographic machine without skill. Became.

According to the bite holder and the adjusting device made as a prototype, the adjusting operation of the cutting bite of 5 μm ± 1 μm, which was required even by a skilled worker for about one hour, could be performed in only 15 minutes.

Further, since the diamond cutting edge is not brought into direct contact with the tool at the time of the adjustment, it is possible to prevent the tool from being damaged due to an adjustment error.

By preparing a plurality of pairs of child holders for attaching the rough and finishing tools, the spare child holder pairs are adjusted during the production operation of the cutting machine, so that the tool can be manufactured during the production. When the life of the machine has expired, production can be resumed simply by replacing it with a spare pair of child holders, so that the production stoppage time of the processing machine can be reduced from just one hour or more to just 10 minutes. Was completed.

As described above, according to the present embodiment, it is possible to greatly increase the production operation rate by the cutting process and to simplify the work.

[0044]

As described above, according to the present invention,
Minimizing the non-production time of the processing equipment and eliminating the skill required for adjusting the bite, even beginners can easily and precisely adjust the bite, preventing damage to the bite, workpiece and peripheral jigs during the adjustment work. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a view showing an entire tool holder according to an embodiment.

FIG. 2 is a diagram showing a child holder and a cutting tool according to the embodiment.

FIG. 3 is a diagram illustrating an entire device for adjusting the amount of protrusion of a cutting tool.

FIG. 4 is a plan view showing details of a child holder attaching jig of the tool for adjusting the amount of protrusion of the cutting tool, and a side view of the jig seen from the left side.

FIG. 5 is a side view of FIG. 4 as viewed from below.

FIG. 6 is a diagram showing a field of view of an enlargement optical system.

FIG. 7 is a diagram illustrating an entire byte protrusion amount adjusting device according to a second embodiment.

[Explanation of symbols]

 1a Diamond tool for roughing 1b Diamond tool for finishing 2a Child holder (for roughing) 2b Child holder (for finishing) 3 Parent holder 113 TV monitor

Claims (7)

[Claims] 1. A holder for a cutting tool to which a cutting tool for roughing and a cutting tool for finishing are mounted, a first holder member to which the cutting tool for roughing is fixed, Cutting, comprising: a second holder member to which a cutting tool for finishing is fixed, and a mounting holder body that detachably supports the first holder member and the second holder member. Tool mounting holder. 2. The cutting tool for rough machining is fixed so as to be adjustable in position with respect to the first holder member, and the cutting tool for finishing machining is fixed with respect to the second holder member. The mounting holder for a cutting tool according to claim 1, wherein the mounting holder is fixed so as to be adjustable in position. 3. A fixing position of the rough cutting tool with respect to the first holder member and a fixing position of the finishing cutting tool with respect to the second holder member are adjusted outside the cutting device. 3. The mounting holder for a cutting tool according to claim 2, wherein the mounting is performed. 4. A first assembly in which the rough cutting tool is attached to the first holder member;
2. The apparatus according to claim 1, further comprising adjusting means for adjusting the weights of the second assembly in which the cutting tool for finishing is mounted on the holder member so that the weights thereof are substantially the same. Mounting holder for the described cutting tool. 5. A first holder member to which a cutting tool for rough machining is fixed so as to be position adjustable, a second holder member to which a cutting tool for finishing machining is fixed so as to be position adjustable, and A cutting tool position adjusting device for adjusting a position of the cutting tool in a mounting holder of the cutting tool, the mounting tool body including a holder member and a mounting holder body that detachably supports the second holder member. A stage for mounting the first holder member temporarily fixed with the cutting tool for rough machining, a second holder member temporarily fixed with the cutting tool for finishing, and a cutting tool for rough cutting; Magnifying optical system for observing the tip and the tip of the finishing cutting tool, the tip position of the roughing cutting tool, and the tip position of the finishing cutting tool are desired The position of the roughing cutting tool is adjusted with respect to the first holder member, and the position of the finishing cutting tool is adjusted with respect to the second holder member such that the following positional relationship is established. And a position adjusting means for a cutting tool. 6. The position adjusting device for a cutting tool according to claim 5, wherein the magnifying optical system includes a television camera. 7. The position adjusting means includes a position adjusting member for adjusting the position of the rough cutting tool and the finishing tool by contacting portions other than the cutting edge of the cutting tool. A position adjusting device for a cutting tool according to claim 5.