JP3942960B2 - Automatic tool cleaning device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a tool automatic cleaning device for a two-face constrained tool in a tool magazine of a machine tool.
[0002]
[Prior art]
When the two-surface constraining tool mounted on the spindle is removed and replaced with the next tool, dirty cutting oil and fine chips adhere to the periphery of the tool immediately after the completion of the machining operation. Since air is blown from the periphery toward the tool before the tool is removed, most of the fine chips and foreign matters are almost removed from the periphery of the tool. When a two-face constrained tool is mounted on the spindle, the tool is in contact with the taper hole of the spindle and the end face of the spindle shaft end, and both ends are in close contact, so it is unlikely that foreign matter has entered the tool. .
However, when air is blown around the tool and the tool is removed from the spindle with the exchange arm and stored in the tool magazine, foreign matter adheres while the tool is moved by the exchange arm several times and transferred due to the positional relationship between the spindle head and the tool magazine. there is a possibility.
[0003]
FIG. 7 is an explanatory diagram of a conventional tool end dust-proof structure provided in the tool pot so that foreign matter does not adhere to the tool end surface on the tool macadine side.
In FIG. 7, the tool pot 101 is fitted in the hole of the chain link 102. In order to use the same tool pot 101 for the tool pot 101 with the end face on the tool insertion side, a spacer 106 for adjusting the thickness of the link is incorporated into every two links to determine the axial position of the tool pot and stop. A magazine chain 110 is configured by being connected to each chain link 102 by a ring 103 and connected by a connection pin 107. The tool T is attached to the taper hole of the tool pot 101 by an exchange arm (not shown), and the storing in the tool magazine is completed.
[0004]
On the end face of the tool pot 101 on the side where the tool T is inserted, a tool reference end face Ta and a ring-shaped dustproof member 104 such as a porous elastic body, such as an oil-resistant sponge, which is deformed and abutted are attached. Yes. The dustproof member 104 does not become an obstacle when fitted into the taper hole of the tool pot 101 of the tool T, and in the state where the tool T is mounted on the tool pot 101 in contact with the tool reference end surface Ta, dust is collected on the tool end surface portion. It has a structure in which foreign matter such as can not adhere. Accordingly, since no new foreign matter adheres to the tool reference end face Ta during storage in the tool magazine, it is effective in preventing foreign matter from sticking to the tapered surface of the tool T even when the tool T is extracted.
[0005]
If the tool is not a two-face constrained tool, there is no problem when it is mounted on the main spindle as the next tool if the tool-side tapered shank is clean, but in the case of a two-face constrained tool, the tool side that contacts the reference end face of the main spindle If the end face, that is, the tool reference end face is not clean, the tool cannot be reliably mounted in the main spindle taper hole, and the axial position becomes uncertain and unstable. Two-face constraining tools such as end mill tools are used for three-dimensional engraving such as dies, and are indispensable for accurately cutting three-dimensional shapes and dimensions.
[0006]
The conventional dust-proof member 104 is effective in that the tool reference end face Ta is covered with the dust-proof member 104 when the tool T is mounted on the tool pot 101, and foreign matter is prevented from sticking during storage in the magazine chain 102. However, when foreign matter adheres to the tool reference end face Ta and is stored in the tool pot 101, the foreign matter remains sandwiched between the two surfaces in contact with the dustproof member 104. Therefore, when the tool T is extracted by the replacement arm and conveyed to the spindle, the tool T is attached to the spindle with foreign matter attached, and the attachment of the tool becomes unstable, so that the mounting accuracy of the tool position cannot be maintained. This is because the dustproof member 104 does not have a function of wiping and cleaning the mating surface only by contacting the tool reference end surface Ta.
[0007]
Therefore, when installing a two-face constraining tool on the spindle or storing it in a tool pot of a tool magazine, carefully blow the air and wipe the tool reference end face with a special cloth that does not separate lint and clean it. It was.
However, now that machining operations are automated and unmanned, there is a need for high-efficiency work. As described above, it is not appropriate to manage tools such as cleaning tools manually as described above. . Further, no means for effectively cleaning the tool reference end face of the two-face constraining tool has been found.
[0008]
[Problems to be solved by the invention]
The two-face constrained tool described in the prior art is once removed from the main spindle by the exchange arm and stored in the tool pot of the tool magazine after the machining operation is completed. The problem is that there is no guarantee that foreign matter is not completely attached to the tool reference end face that contacts the spindle reference end face and its surroundings, and it is not possible to maintain cleanliness when it is stored and removed again in the spindle and attached to the spindle. was there. As a result, there is a case where the mounting of the tool is unstable, and there is a problem that the processing automation cannot be promoted on the premise of automatic tool replacement.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art. The object of the present invention is to provide a foreign material that adheres to the spindle reference end surface before being mounted on the spindle in a tool magazine of a machine tool that uses a two-face constraining tool. This ensures the tightening of the tool. Therefore, during the index movement of the tool pot in the tool magazine, the rotating ring with brush is rotated synchronously, or a long brush is appropriately disposed on the magazine frame, so that It is an object of the present invention to provide an automatic tool cleaning device for cleaning a tool reference end face during movement in a tool magazine storing a tool.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, an automatic tool cleaning apparatus according to claim 1 is a tool magazine of a machine tool that can use a two-face constrained tool, and is rotatably mounted on the tool insertion side mouth of a tool pot. A rotary ring in which a rotary passive part is formed, a cleaning member attached to an end face of the rotary ring opposite to a tool reference end face of the two-surface constraining tool, and a movement of the tool pot in contact with the rotary passive part A rotation imparting member fixed to the magazine frame along the magazine chain to rotate the rotating ring at times, and cleaning the tool reference end face of the two-face constraining tool during the movement of the tool pot in the tool magazine It is.
[0011]
According to invention of Claim 1, the end mill for die-carving can be illustrated as a two-surface restraint tool. In order to form a three-dimensional shape, it is also necessary to control positioning in the tool axis (Z-axis) direction. Therefore, a two-surface constraining tool that comes into contact with the main shaft reference end surface of the main shaft end is indispensable. Further, in order to accurately position the tool tip in the Z-axis direction, it is necessary to prevent foreign matter from adhering to both the main shaft reference end surface and the tool reference end on the tool side in contact with the main shaft reference end surface. The taper hole of the main shaft and the subsequent end face are cleaned by air blowing around the main shaft regardless of the tool used.
[0012]
The tapered portion on the two-surface constraining tool side can eliminate foreign matters by air blowing toward the tapered surface. The tool reference end face that has been in contact with the spindle reference end face is air blown together with the taper portion. However, the tool reference end face is a surface orthogonal to the taper axis and may result in insufficient air blow. Therefore, when the tool pot is moved by the indexing command on the tool magazine side, a rotating ring that is rotatably mounted at the mouth of the tool pot and has a cleaning member attached to the end face is associated with a rack gear fixed to the magazine frame body. The tool reference end face of the two-face constraining tool that comes into contact with the end face of the cleaning member is cleaned so that no foreign matter is held between the contact planes.
[0013]
The tool automatic cleaning device according to claim 2 is a tool magazine of a machine tool that can use a two-surface constraining tool, and a tool pot mouth end surface that is connected and moved and positioned by a chain link and a tool stored in the tool pot. A brush that can be inserted into a gap formed by the tool reference end surface and has a hair brushing length that is equal to or larger than the mouth radius of the tool pot, and the brush is substantially parallel to the mouth end surface of the tool pot and intersects the moving direction of the tool pot. It comprises a brush support, which is fixed to the magazine frame by insertably preparative wear before Symbol gaps arranged on both sides in the moving direction of the tool pot to the peripheral tool reference edge when the tool pot is moved The foreign matter is removed by rubbing with a brush.
[0014]
According to the second aspect of the present invention, the tool stored in the tool pot and the advance / retreat of the next tool indexing are performed by the brush provided on the brush support in which the foreign matter entering the gap between the mouth end face of the tool pot and the tool reference end face is fixed to the magazine frame. It is cleaned by discharging to the outside by using movement. It is effective for cleaning to arrange a brush having a long hair face to face each other so that the hair tips come into contact with each other and to move the tool pot forward and backward so as to cross the contacting portion of the hair tips.
The brush does not stick to the above arrangement. Arrangement of the brush which can exhibit a better cleaning effect on the magazine frame can be arbitrarily selected.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Example 1] FIG. 1 is a sectional view of a tool pot with a rotating ring on a chain link, FIG. 2 is a layout view of a rotating ring and a rotation imparting member that rotates in contact with the rotating ring, and the third is a gear and rotation of the rotating ring FIG. 4 is an AA cross-sectional view of FIG.
[0016]
The relationship among the chain link, tool pot, spacer, retaining ring and connecting pin constituting the magazine chain is substantially the same as that described in the prior art.
In FIG. 1, a tool pot 1 is fitted on a chain link 2, and the axial direction of the tool pot 1 is positioned by a retaining ring 3. A rotary ring 5 in which a rotational passive portion 5a such as a tooth shape is formed on the outer periphery so that rotational force can be transmitted and received, and a cleaning member 4 is attached to an end surface of the tool pot 1 on the insertion side of the tool T is inserted into the tool pot 1. The outer side of the mouth is rotatably mounted. The rotating ring 5 is guided between the end surface 1 a of the heel of the tool pot 1 and the end surface 2 a of the chain link 2 or the end surface of the spacer 6. The spacers 6 are used every other link to connect the chain links 2 with the connecting pins 7 and constitute a magazine chain 10. The cleaning member 4 is in contact with a tool reference end surface Ta that is a large-diameter side flange end surface of the taper shank of the tool T.
[0017]
The rotation of the tool T on the chain link 2 is restricted by a stopper 8 (see FIGS. 3 and 4). Therefore, the tool reference end face Ta does not rotate. As will be described later, the rotating cleaning member 4 uses a brush 9 that is not easily cut and released. When the felt is formed and used as a cleaning member, the felt is selected so that the felt pieces do not separate and adhere to the tool reference end face Ta. The shape of the rotation passive portion 5a can be selected from a gear, a synchro belt wheel, a V belt wheel, a tire wheel, and the like.
[0018]
In FIG. 2, the tool pot 1 with the rotating ring 5 mounted on the outer side of the chain link 2 of the magazine chain 10 mounted on the magazine frame 11 (see FIG. 3) for storing a used tool or carrying out the next tool is advanced and retracted. It moves and is indexed and positioned at a predetermined position. In this embodiment, a rack gear 13 is fixed to the magazine frame 11 along the magazine chain 10 as a rotation imparting member 12 that contacts the rotation passive portion 5 a of one or more rotating rings 5 in parallel with the magazine chain 10. Therefore, during the indexing movement of the magazine chain 10, a rotational force is applied from the rotation applying member 12 to the rotating ring 5 that is externally mounted on the tool pot 1.
[0019]
3 and 4, the chain link 2 of the magazine chain 10 is guided by the roller surface on the outer periphery of the tool pot 1, and is tensioned between a pair of chain wheels (not shown) to be indexed and driven in the front and back direction of the paper surface. The tool T is fitted in the tool pot 1 so as to always hold a fixed direction by a stopper 8 fixed to the chain link 2. The gear of the rotation passive portion 5a of the rotation ring 5 is engaged with the rack gear 13 fixed to the magazine frame 11, and only the rotation ring 5 rotates. By this rotation, the cleaning member 4 attached to the end face of the rotating ring 5 cleans the tool reference end face Ta. The rotation imparting member 12 can rotate the rotating ring 5 using a chain, a synchro belt, a V belt, and a V belt groove corresponding to the shape of the rotation passive portion 5a in addition to the rack gear 13.
[0020]
Next, the operation of the automatic tool cleaning device configured as described above will be described.
The used tool is stored in the tool pot 1 of the tool magazine by the operation of the tool changing arm that holds and waits for the next tool. FIG. 1 shows the state of the tool pot 1 and the rotating ring 5 before storing the tool (lower diagram) and after storing the tool (upper diagram). At the time of storing, the tool reference end face Ta is pressed against the brush 9, and the tool itself is held in the tool pot 1 by the taper shank face Tb.
[0021]
Therefore, the brush 9 needs to have the length and thickness of the hair which can be deformed when pressed. If the hair is too long, it will be an obstacle to storing the taper shank, and if it is too short, the cleaning effect will be reduced.
If the hair is too thick, it will resist the fitting of the taper shank during storage, and there will be a problem of reliable gripping with the tool pot. Further, if the hair coat is too thin, durability against repeated use decreases.
[0022]
It is also possible to mount the rotating ring 5 on all the tool pots 1. It is also possible to provide the rotating ring 5 only in a specific tool pot and use it for storing the two-face constraining tool. A rotation imparting member 12 for rotating the tool pot 1 in contact with the rotation passive portion 5 a formed on the outer peripheral surface of the cylinder of the rotation ring 5 is fixed to the magazine frame 11 along the magazine chain 10. Therefore, as shown in FIG. 2, when the rotation applying member 12 is engaged with the rotation passive portions 5 a of the plurality of tool pots 1 like the rack gear 13, the rotation ring 5 is rotated in the entire region passing through the engagement. Is granted. When the magazine chain 10 moves back and forth, the rotating ring 5 rotates in the forward and reverse directions accordingly.
[0023]
The shapes of the rotation passive portion 5a and the rotation imparting member 12 of the rotating ring 5 are as described in the configuration of the embodiment, and the gear and rack gear, chain wheel and chain, belt and corresponding wheel (V belt, timing belt). Etc.) It is possible to select from combinations of tires and corresponding guide grooves. When a tool pot with a rotating ring that does not store the tool is generated, the tool pot is detected and positioned at a specific position of the tool magazine, and the brush 9 and the taper hole 1b of the tool pot are blown with air to blow the tool. This is effective for improving the cleanliness of the next tool sent from the magazine. The rotating ring 5 only needs to be rotated by the rotation force transmitted by contact with the rotation applying member 12, and does not necessarily have to rotate in synchronization. Therefore, a means for rotating the rotating ring 5 by friction conduction by the V-shaped groove without being engaged is advantageous in terms of economy.
[0024]
[Example 2]
FIG. 5 is a front view of a brush and a brush support for cleaning the gap between the tool pot mouth end surface and the tool reference end surface, and FIG . 6 is a cross-sectional view taken along the line BB in FIG.
5 and 6, on the base of the magazine frame 11 of the tool magazine, a pair of upper and lower chain links 22A and 22B are connected in the moving direction by a connecting pin 26. The tool pot 1 is fitted in the center of the chain links 22A and 22B, and the tool pot 1 is positioned in the axial direction by the retaining ring 3.
[0025]
Adjacent chain links use spacers 24 corresponding to the plate thickness, and are driven and positioned by pin wheels 25 by grooved wheels (not shown). The tool T is inserted into the drilled tapered hole 1b in the center of the tool pot 1. When the tool T is inserted into the tapered hole 1b, a slight gap S exists between the mouth end face 1a of the tool pot 1 and the tool reference end face Ta on the tool side. The thickness of the brush 21 is formed to such an extent that the brush 21 can be inserted into the gap S, and the brushing length L is made longer than the mouth radius of the tool pot 1 to constitute the brush 21.
[0026]
The brush 21 is attached to the upper surface of the brush support 23 in parallel and horizontal at substantially the same height as the mouth end face 1 a of the tool pot 1, and the lower part is fixed to the magazine frame 11. The hair of the brush 21 is fixed in the direction intersecting the moving axis of the tool pot 1, but the intersecting angle can be changed as appropriate. The gap S is almost constant, but a slight dimensional difference may occur. By preparing brushes with different thicknesses corresponding to the gaps S and installing them adjacent to each other, the dust removal effect can be fully achieved.
[0027]
In the second embodiment, the fixing position of the brush unit including the brush 21 and the brush support 23 on the magazine frame 11 is arbitrary and free. Further, the brush units may be arranged to face each other. The cleaning effect can be enhanced by arbitrarily selecting the arrangement of the brushes 21 such as a staggered shape or an antipodal shape.
Further, it is necessary to lengthen the hair of the brush 21 so that it can withstand bending. For example, in order to push and bend the hair of the tool pot 1, the hair must have a hair length that is always larger than the radius of the tool pot mouth. The length is preferably at least twice the radius of the mouth. The brush 21 is elastic and requires a sufficient fatigue strength even in repeated reverse bending.
[0028]
Next, the cleaning action by the brush 21 will be considered.
The brush 21 has an initial bristle which is in contact with the outer diameter surface of the large-diameter tapered portion close to the tool reference end surface and is gradually bent to a large extent. The foreign matter that has contacted the hair of the hair and moved to the brush side should be attached to the tip rather than being pinched by the middle part of the hair of the brush. Easy to separate.
[0029]
For this purpose, the hair may be cut obliquely so as to be bent in contact with the long hair from the short hair. In addition, the brush 21 is effective for separating foreign substances when intermittent flocking is performed instead of continuous flocking. Regarding the relationship between the movement direction of the tool pot and the cleaning effect of the brush, since the brush is fixed, it can be expected that the cleaning effect is improved by reciprocating the tool pot around the brush. Therefore, by considering the attachment position of the brush and the indexing method of the next tool so that the tool pot can move forward and backward around the brush 21 before the indexing of the next tool is finished, a better cleaning effect can be obtained.
[0030]
【The invention's effect】
Since the automatic tool cleaning apparatus of the present invention is configured as described above, the following effects can be obtained.
By carrying out the invention described in claim 1,
(1) Prior to mounting the next tool on the spindle, the manual work for cleaning the tool reference end face of the two-surface constraining tool in contact with the spindle reference end face is unnecessary.
(2) It has become possible to fully automate the machining process using a two-sided restraint tool.
(3) Since no cleaning device is provided on the main machine side of the processing machine and the cleaning operation is automatically performed on the tool magazine side, no major change is required in the conventional equipment.
(4) A rotating ring is mounted on the mouth of the tool pot, and the tool-side reference end face can be cleaned by engaging it with a fixed rotation imparting member in conjunction with the movement of the tool pot and cleaning it. The cost is low and the cleaning effect is great.
[0031]
In the invention described in claim 2, in place of the dust-proof member placed between the mouth end face of the tool pot and the tool reference end face of the tool, the foreign object adhering surface and the brush are moved and brought into contact with each other to prevent the intrusion of the foreign object. The tool reference end face can be positively wiped and cleaned.
The position where the long brushes are arranged to face each other is not affected by the number of tool storage and the shape of the tool pot, so that any number can be installed at any place and the cleaning effect can be enhanced. Have
Since the cleaning action by the brush is performed every time the tool pot passes through the fixed brush in conjunction with the forward / backward movement operation at the time of indexing drive for storing the tool and taking out the next tool, the cleaning effect can be further improved.
Using the elastic deformation of the brushing brush, the foreign matter is transferred to the brush side, and the foreign matter is removed from the brush by the elasticity at the time of recovery of deformation, so the brush is kept clean and the ability to remove foreign matter from the tool reference end face can be maintained. Has an effect.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a tool pot with a rotating ring on a chain link.
FIG. 2 is a layout view of a rotating ring and a rotation imparting member that rotates in contact with the rotating ring.
FIG. 3 is an engagement state diagram of a gear of a rotating ring and a rack gear of a rotation imparting member.
4 is a cross-sectional view taken along the line AA in FIG.
FIG. 5 is a front view of a brush and a brush support for cleaning a gap between a mouth end face of a tool pot and a tool reference end face.
6 is a BB cross-sectional view of FIG.
FIG. 7 is an explanatory view of a conventional tool end face portion dust-proof structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tool pot 2 Chain link 3 Retaining ring 4 Cleaning member 5 Rotating ring 6 Spacer 7 Connection pin 8 Stopper 9 Brush 10 Magazine chain 11 Magazine frame 12 Rotation imparting member 13 Rack gear 21 Brush 22A, 22B Chain link 23 Brush support 24 Spacer 25 pin roller 26 connecting pin

Claims (2)

  In a tool magazine of a machine tool that can use a two-surface constraining tool, a rotary ring that is rotatably mounted on the tool insertion side of the tool pot and has a circular passive surface formed on a cylindrical outer peripheral surface, and the tool of the two-surface constraining tool A cleaning member attached to an end surface of the rotating ring facing a reference end surface, and a magazine frame along the magazine chain to rotate the rotating ring when the tool pot is moved in contact with the rotating passive unit. A tool for automatically cleaning a tool, wherein the tool reference end surface of the two-surface constraining tool is cleaned during movement of the tool pot in the tool magazine. In a tool magazine of a machine tool that can use a two-face constrained tool, it can be inserted into a gap formed by a mouth end surface of a tool pot connected and moved by a chain link and a tool reference end surface of a tool stored in the tool pot; A brush having a hair brushing length equal to or larger than the radius of the mouth of the tool pot, and the brush are arranged on both sides of the tool pot moving direction so as to be substantially parallel to the tool pot mouth end surface and intersect the tool pot moving direction. the pre-Symbol comprises a brush support, which is fixed to wear to the magazine frame insertably taken in the gap, to remove foreign matter by the tool pot is abraded peripheral tool reference end face with a brush as it moves Automatic tool cleaning device characterized by

Images