JPH0392237A - Tool pot for tool magazine - Google Patents

Abstract

PURPOSE:To surely house a tool pot with simple constitution by fitting a bottom plate to one end of a pot tube having a housing hole straightly penetrated with a cross section shape made identical, and gripping a holding member, housing the pull-stud head part of a tool to be housed, and a neck part on the bottom plate with an elastic gripping member. CONSTITUTION:A straight housing hole 3 is formed on a pot tube 5, and a bottom plate 31 is fitted to the bottom part of the housing hole 3. A housing cup 13, in which the pull-stud head part 11 of a tool is housed, and an elastic gripping member 17 are provided on the bottom plate 31, and a pull-stud neck part 15 is firmly gripped on the center axis line of the housing hole 3 with the head part 11 inserted so that a tongue piece part 50, to which the elastic gripping member 17 faces, can be expanded. Moreover since the arbor 97 of a tool is abutted at the entrance part of the housing hole 3, a tool 9 can be straightly held on the center line of a tool pot 1. The bottom plate 31 is pivottally fitted to an arm 57. Consequently the tool pot structure can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Field of Industrial Application] The present invention relates to a tool pot that is attached to a tool magazine.

[Prior Art] Conventionally, a tool magazine is known in a machining center or the like, in which a plurality of tool pots for storing tools used for machining are arranged, for example, radially and are rotatably indexable. The tools stored in each tool pot are usually standardized by JIS or the like, and the aperture is formed into a conical shape with a predetermined taper. The storage hole of a conventional tool pot is formed with a taper similar to the aperture of the tool, and a spring member or the like for gripping the bull stud of the tool is attached to the bottom of the storage hole. The tapered surface of the storage hole comes into contact with the tapered surface of the aperture of the tool, thereby preventing the tool from wobbling and ensuring that the tool is accurately positioned on the extraction axis during automatic tool exchange, for example. .

As such a tool pot, for example, JP-A-63-52
942 and JP-A-63-123646 are known.

[Problems to be Solved by the Invention] However, it is extremely difficult to taper the storage hole in a conventional tool pot, and there is a problem in that a large number of man-hours are required to manufacture the tool pot.

The tool pot of the tool magazine of the present invention is intended to be extremely simple to manufacture.

Structure of the Invention [Means for Solving the Problems] The tool pot of the tool magazine of the present invention removably holds tools used for machining and is indexable to a predetermined tool take-out position. a pot tube having a straight through storage hole with the same cross-sectional shape, a pot bottom plate attached to one end of the pot tube and forming the bottom of the storage hole, and a pot bottom plate provided near the pot bottom plate in the storage hole, an elastic gripping member that elastically grips the neck of a pull stud of a tool to be inserted into the storage hole from at least two directions; and an elastic gripping member provided near the pot bottom plate in the storage hole to pull the tool to be inserted into the storage hole. It is characterized by comprising a head housing and holding member that houses the head of the stud and holds the head of the pull stud on a predetermined axis of the housing hole.

[Function] The tool pot of the tool magazine of the present invention is assembled by attaching the pot bottom plate to the end of the pot cylinder. At this time, a head accommodating and holding member and an elastic gripping member are attached near the pot bottom plate within the storage hole. Note that the head accommodation and holding member and the elastic gripping member need only be placed near the pot bottom plate, and do not need to be directly attached to the pot bottom plate. In the tool pot assembled in this way, when a tool is inserted into the storage hole of the pot cylinder, the neck of the pull stud is gripped from two directions by the elastic gripping member, and the head of the pull stud is accommodated in the head storage holding member. and is held on a predetermined axis within the storage hole. Since the neck of the pull stud is elastically gripped from two directions by the elastic gripping member, the head of the pull stud is held in place even when the tool pot is moved to a predetermined tool removal position by driving the machine gun. Department Accommodation Holding Department Do not escape from the customer. As a result, even though the storage hole does not make surface contact with the aperture of the tool, the tool is stored straight with respect to the predetermined axis of the storage hole, and the tool can be kept on the extraction axis even at the tool removal position. can.

[Example] Next, an example embodying the present invention will be described in detail based on the drawings.

FIG. 1 is an exploded perspective view of the tool pot of the embodiment, and FIGS. 2(A) to 3(C) and FIGS. 3(A) and 3(B) show longitudinal sections and end faces of some of the parts.

The tool pot 1 includes a pot cylinder 5 in which a storage hole 3 penetrating with a straight cross section is formed approximately in the center, a pot bottom plate 7 attached to one end surface of the pot cylinder 5 to form the bottom of the storage hole 3, and a pot bottom plate 7. A head accommodating cup 13 is attached to the bottom plate 7 and accommodates the pull stud head 11 of the tool 9 at the center of the bottom of the storage hole 3; The elastic gripping member 17 is gripped near the bottom of the holder.

The pot cylinder 5 is made of aluminum material by extrusion molding. Therefore, the storage hole 3 can be easily formed with high accuracy without cutting or the like. A pot key 23 that fits into a key groove 21 provided in the collar 19 of the tool 9 is fixed to the tool storage side end surface 5a of the pot cylinder 5 on the side of the storage hole 3 with a hexagonal socket bolt 25. has been done. On the other hand, a fitting groove 27 is provided in the bottom surface 5b of the pot cylinder 5, passing through the central axis of the storage hole 3 and fitting into the pot bottom plate 7. Note that this fitting groove 27 has the same width as the diameter of the storage hole 3. In addition, two screw holes 29, 29 are threaded into the fitting groove 27 with the storage hole 3 in between.

The pot bottom plate 7 includes a band plate part 31, two opposing support plate members 33 extending from both edges of the back surface of the band plate part 31,
It consists of 33. The width of the band plate portion 31 is large enough to fit into the fitting groove 27 formed on the bottom surface 5b of the pot cylinder 5, and the length is approximately the same as the length of the fitting groove 27 of the pot cylinder 5. A central through hole 35 that overlaps with the central axis of the storage hole 3 of the pot tube 5 is provided at the center in the longitudinal direction of the strip plate portion 31, and the screw holes 29, 29 of the pot tube 5 are inserted across the central through hole 35.
Through-holes 37, 37 are provided at positions overlapping with each other. Furthermore, a protrusion 39 is formed on each of the support plate members 33, 33, and a gripping rod 41 that is gripped by the swinging mechanism when taking out a tool is pivotally supported here.

The head accommodation cup 13 has a blind hole 43 that fits into the pull stud head 11, as shown in FIGS. 3(A) and 3(B),
A screw hole 45 is threaded at the bottom of the blind hole 43. Also,
The entrance portion of the blind hole 43 is chamfered slightly larger.

As shown in FIG.
Opposing gripping claws 47, 47 formed by bending it into a letter shape and further bending both free ends thereof into a letter shape;
It has a through hole 49 formed at the center of the bottom of the letter. The free end side of the gripping claw 47 is formed into a diagonal tongue portion 50 having a predetermined angle. Note that the interval between the gripping claws 47-47 is made smaller than the outer shape of the pull stud neck 15 of the tool.

The dimensions of each of these parts are determined by the length of the aperture of the tool 9, and the diameter of the storage hole 3 is made the same as the predetermined aperture cross section A near the collar 19 of the tool 9. In addition, in the assembled state of the tool pot 1, the length from the entrance of the storage hole 3 to the bottom of the blind hole 43 of the head storage cup 13 is the predetermined cross section A described above.
The length is approximately the same as the length from the end to the tip of the pull stud head 11.

To assemble the tool pot 1, as shown in Figure 1, first,
The screw hole 45 of the head accommodation cup 13 is connected to the elastic gripping member 1.
It is arranged so as to overlap the through hole 49 within the U-shaped space No. 7.

Next, insert the cross screw 51 into the center through hole 35 of the pot bottom plate 7.
is inserted into the screw hole 45, and the pot bottom plate 7 is secured.
A head storage holding member 13 and an elastic gripping member 17 are located in the center of the
Attach. Next, the through holes 3 at both ends of the pot bottom plate 7 are
7, 37 is screwed into the bottom surface 5b of the pot tube 5.
9 and 29, and fasten the pot bottom plate 7 and the pot tube 5 using cross screws 53 and 53. Furthermore, a pot key 23 is attached to the front side of the pot cylinder 5, and a pot key 23 is attached to the front side of the pot cylinder 5.
The support members 33, 33 are pivotally supported by the pot arm 57 via a pin 55. Note that both ends of the pin 55 are prevented from coming off by E-shaped retaining rings 59, 59. In addition, the gripping rod 41 also
It is attached between the two support plate members 33, 33 with a pin 61 and E-shaped retaining rings 63, 63.

This tool pot 1 is attached to a magazine body 67 of a tool magazine 65 via a pot arm 57, as shown in FIGS. 4(a) and 4(b). The magazine main body 67 is rotatably driven via a hypoid gear 69 provided on the rear surface, and is assembled into a compact machining center 70 as shown in FIG.

The machining center 70 has a machining head 71 that removably holds a machining black 9now used for machining, supported on a column 75 so as to be able to approach and move away from a work table 73. The tool magazine 65 is aligned with the magazine axis M perpendicular to the axis of the main spindle.
It is assembled into one piece so that it can rotate freely around the center. A magazine cover 77 is attached to the tool magazine 65 to prevent cutting debris from entering.
completely covered.

In the machining center 70, a plurality of tools stored in the tool magazine 65 are automatically exchanged, and continuous workpiece machining is executed. During machining, the spindle motor 81 is driven to rotate the current process tool 9now held in the machining head 71 to process the workpiece. When the tool exchange timing comes, the vertical motor 83 is driven to retract the machining head 71 upward, and the spindle motor 81 is further driven to execute spindle orientation. Next, the magazine motor 85 is driven to rotate the tool magazine 65 and the next process tool 9next is loaded.
Move the tool pot 1next containing the tools to the tool take-out position P, and as shown in FIG.
The tool pot 1nex is inserted between the gripping fingers 88 and 89 of the tool pot 1nex, and the swinging motor 91 is driven to operate the swinging mechanism 87.
Swing t downward. Furthermore, a replacement arm motor 93
to operate the replacement arm 95, and remove the current process tool 9.
Gripping/extracting/extracting now and next process tool 9next at the same time
Change tools by performing rotation, insertion, and release operations. Continuous machining of the workpiece is performed by repeating these series of operations.

The state in which the tool 9 is returned to the storage hole 3 due to tool exchange will be explained based on FIG. 6.

The replacement arm 95 is driven by the replacement arm motor 93 and pulled upward, and inserts the aperture 97 of the tool 9 it grips into the storage hole 3 . When the tool 9 is inserted into the storage hole 3, the pull stud head 11 is inserted into the elastic gripping member 1.
7's opposing tongue pieces 50, 50 are pushed apart and entered into the U-shaped space of the elastic gripping member 17. The head 11 is a gripping claw 47
-47, the gripping claws 47, 47 close due to elastic force and firmly grip the pull stud neck 15 on the central axis of the storage hole. At this time, the pull stud head 11 further enters the bottom of the storage hole 3, and the head storage cup 13
is guided into the blind hole 43 of. The pull stud head 11 is further pushed toward the bottom of the storage hole 3 while being fitted into the blind hole 43, and stops at a position where the outer peripheral surface of the aperture 97 comes into contact with the entrance portion of the storage hole 3 and closes it. .

The tool 9 thus stored in the tool pot 1 is held on the central axis of the storage hole 3 by the action of the elastic gripping member 17 and the head storage cup 13, and tightly closes the entrance of the storage hole 3. Therefore, even if cutting waste is scattered during workpiece machining, the cutting waste will not enter into the storage hole 3 of the tool pot 1.

In addition, since the tool 9 is held on the central axis of the storage hole 3 and is elastically gripped from the opposite direction by the elastic gripping member 17, it does not wobble even when the tool magazine 65 is rotated. The stud head 11 does not pop out from the blind hole 43 of the head accommodation cup 13. Moreover, the swing mechanism 8
Even if the tool pot 1 is swung by the tool pot 7 and the tool 9 is directed downward, the tool 9 will not fall off because it is held down by the elastic gripping member 17. In particular, in this embodiment, since the aperture 97 of the tool 9 comes into contact with the edge of the storage hole 3 at the entrance portion of the storage hole 3, the tool 9 can be inserted into the head storage cup 13,
The tool is held in three positions by the elastic gripping member 17 and the entrance of the storage hole 3, so that the tool can always be accurately held on the central axis in the tool pot 3.

As explained above, the tool pot 1 of this embodiment has a structure in which the pull stud head 11 and neck 15 of the tool 9 are held on the central axis of the storage hole 3 by the head accommodation cup 13 and the elastic gripping member 17. Therefore, the tool 9 can be held straight on the central axis of the tool pot 1. In addition, since the aperture 97 of the tool 9 is in contact with the entrance of the storage hole 3 in the stored state, it is possible to prevent cutting debris from entering even though the storage hole 3 has a straight shape. . As a result, the pot cylinder 5 formed of extruded material
The tool pot 1 can be easily manufactured using the above method, and manufacturing man-hours and costs can be significantly reduced.

Further, the elastic gripping member 17 is provided with tongue portions 50, 50,
Since the pull stud neck 15 is elastically gripped from opposite directions on the central axis of the storage hole 3, when inserting the tool 9 into the storage hole 3, the pull stud head 11 is gripped by the head storage cup 13. can be smoothly guided into the blind hole 43. As a result, even if the tool pot 1 is simply manufactured from extruded material, it can be used for tasks such as automatic tool exchange in the machining center 70 or the like without any problem, and the tool 9 can be reliably returned to the storage hole 3. can. Further, since the pull stud neck 15 is gripped from two directions by the elastic gripping member 17, the tool pot 1 is gripped by the swinging mechanism 87.
Even if the tool 9 is swung downward, the tool 9 does not fall off.

Further, a diagonal tongue portion 50 is provided at the free end of the elastic gripping member 17.
, 50, the pull stud head 11 can be guided into the blind hole 43 of the head accommodating cup 13 and securely fitted during automatic tool exchange. In addition, by chamfering the entrance portion of the blind hole 43 of the head accommodation cup 13, the pull stud head 1
1 into the blind hole 43 more accurately.

In addition, since the tool 9 is placed straight in the tool pot 1 in the stored state, smooth work is possible when gripping and extracting with the exchange arm 95, making it extremely suitable for automatic tool exchange. The structure is as follows.

In this embodiment, the storage hole 3 with a circular cross section is used, but it may be selected as appropriate depending on the shape of the aperture of the tool 9. In this case, the cross-sectional shape of the storage hole may be a shape that does not necessarily match the cross section of the aperture. It is not necessary to have a shape, and the shape may be any shape as long as it can accommodate the aperture.

Further, as the elastic gripping member 17, a configuration in which the elastic gripping member 17 is gripped on the central axis of the storage hole 3 from three or four directions can be adopted.

Furthermore, when closing the entrance of the storage hole 3 with the aperture 97 of the tool 9, the dimensions of each part are as follows: The size may be such that the head 11 reaches the head accommodating cup 13, and it is not necessary that the pull stud head 11 abuts the bottom of the blind hole 43 during storage.

Further, in the final product state, the straight-shaped storage hole 3 can be modified as appropriate, such as by chamfering the entrance portion to further accommodate tools. In this case as well, the storage hole 3 remains basically straight in shape.

In addition, it is not necessarily necessary to hold the tool on the central axis of the storage hole 3; it is sufficient that the tool can be held on the tool extraction axis when taking out the tool.

Further, the head accommodation cup 13 does not need to be perfectly cup-shaped, but only needs to be able to abut the outer periphery of the pull stud head 11 and hold the pull stud head 11 on the central axis.

Further, the pot cylinder 5 is not limited to an extruded material, and straight-shaped holes may be formed by cutting, and the effect of reducing the number of processing steps can be sufficiently obtained. In addition, it is also possible to cut and use ready-made pipes.

Although the embodiments of the present invention have been described above, the present invention is not limited to these in any way. Various embodiments may be adopted without departing from the gist.

Effects of the Invention According to the present invention, in a tool pot of a tool magazine that allows tools to be indexed to a predetermined tool take-out position, even if a pot cylinder having a straight-shaped storage hole that is easy to process is used, the tools cannot be placed in the storage hole. can be held along a predetermined axis of the tool, and this storage axis can be accurately maintained even when indexing the tool. As a result, manufacturing costs and man-hours for the tool pot can be significantly reduced. This makes it possible to use an extruded material as the pot cylinder, which is extremely effective.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the tool pot of the embodiment, and FIGS. 2 (a), (b), and (c) are longitudinal cross-sectional views of the pot cylinder, respectively.
The front view and rear view, Figures 3 (a) and (b) are respectively a vertical cross-sectional view and front view of the head accommodation cup, and Figures 4 (a) and (b) are the rotary model equipped with the tool pot of the embodiment. A vertical sectional view and a rear view of an indexable tool magazine, and FIG. 5 is a perspective view of a small machining center using this tool magazine.
FIG. 6 is an explanatory diagram showing the tool storage state in this machining center.

Claims (1)

[Scope of Claims] 1. A tool pot of a tool magazine that removably holds tools used for machining and can be indexed to a predetermined tool take-out position, the pot having a straight through storage hole with approximately the same cross-sectional shape. a tube; a pot bottom plate attached to one end of the pot tube and forming the bottom of the storage hole; and a pot bottom plate provided in the storage hole near the pot bottom plate to support the neck of a pull stud of a tool to be inserted into the storage hole. an elastic gripping member that elastically grips from at least two directions; and an elastic gripping member that is provided near the pot bottom plate in the storage hole and that accommodates the head of a pull stud of a tool to be inserted into the storage hole and the head of the bull stud. A tool pot for a tool magazine, comprising a head housing and holding member that holds the head on a predetermined axis of the storage hole.