JPH08290340A - Tool pot - Google Patents

Abstract

PURPOSE: To prevent the fall of a short tapered holder by providing a plate spring for holding an inclined part, placed in a stepped position between a large diameter part and a small diameter part disposed on the inner diameter side of the short tapered holder, by resilience. CONSTITUTION: When the tapered face 7 of a short tapered holder 71 is about to be insert-fitted to the tapered face 2a of a tool pot body 21, the guide part 3a of a plate spring 31 comes in contact with a small diameter part 7d provided at the inner diameter part of the holder 71, and the plate spring 31 starts bending in the axial direction of the tool pot body 21. The holder 71 advances on while the small diameter part 7a of the holder 71 and the inclined part 3d of the plate spring are in contact. When the tapered face 7a of the holder 71 is insert-fitted to the tapered face 2a of the tool pot body 21, the short tapered holder 71 is enclosed in the state of the plate spring energizing to hold the inclined part 7c of the holder 71 to the small diameter side in relation to the axial direction of the tapered face 2a of the tool pot body 21 by the resilience.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for mounting a cutting tool of a machine tool equipped with an automatic tool changer such as a machining center, and a step position between a large diameter portion and a small diameter portion on the inner diameter side. The present invention relates to a tool pot that accommodates a short taper holder having an inclined portion. As a method for accommodating a short taper holder in which the taper portion of the tool holder is shortened and the inner diameter portion is hollow, a utility model publication gazette, Sho 60-1568.
As described in No. 36, page 4, line 1 to page 8, line 8, the tool pot body that constitutes the tool pot and the short taper holder with a hollow inner diameter part can be inserted into the inner diameter part of the tool pot body. A ball holder having a plurality of holes formed therein, a plurality of balls for holding a short taper holder, a ball retainer having an engaging surface for engaging the balls, and the ball retainer on the ball side. It was composed of a spring for urging and pressing the ball toward the taper holder side, and a fixed part for fixing the ball pressing part. [0003] High-speed rotation is required for cutting of small tools such as drills and small millings using a machining center. However, with the conventional taper shank and pull stud, The configured tool holder has a long overall length and a heavy weight, which makes it difficult to support high-speed rotation. In order to adapt to high-speed rotation, it is required to use a short taper holder that does not use a pull stud as in German standard DIN69893 but shortens the taper shank portion and makes the inside hollow. The present invention provides a tool pot that accommodates the short taper holder suitable for high speed rotation. Further, in the tool pot for accommodating the short taper holder, the parts constituting the tool pot are simplified to improve the parts cost, rationalize the assembly work, and simplify the work at the time of maintenance and inspection. The present invention is a tool pot for holding a short taper holder having a hollow inner diameter without a pull stat for mounting a cutting tool, and the tool pot is a tapered surface of the short taper holder. The tool pot body has a taper surface that is the same as the inner surface of the tool pot, and the inner diameter of the tool pot body has a plurality of outer diameter pressing members provided in a direction parallel to the axial direction of the tool pot body. And a plurality of leaf springs each having an inclined portion at a step position between the large diameter portion and the small diameter portion, and the leaf springs are pressed in a direction parallel to the axial direction of the tool pot body and in an outer diameter direction. The engaging plate is attached in the direction in which it is attached. A tool spring is formed by inserting a leaf spring into the engaging plate and integrating the engaging plate with each other to fix the plate with a bolt or the like. [Operation] When the tapered surface of the short taper holder tries to contact the tapered surface of the tool pot body,
The guides of a plurality of leaf springs, which are provided in the direction parallel to the axial direction of the tool pot and are pressed in the outer diameter direction, are in contact with the small diameter part provided in the inner diameter part of the short taper holder, and the inner diameter side of the tool pot body Is pressed by. When the tapered surface of the short taper holder comes into contact with the tapered surface of the tool pot body, the inclined portion at the step position between the large diameter portion and the small diameter portion of the leaf spring is elastic force of the leaf spring, and The inclined portion at the step position between the large diameter portion and the small diameter portion provided on the inner diameter portion is pressed and biased toward the small diameter side of the tapered surface of the tool pot body. [0006] [Embodiment] A typical embodiment of the present invention will be described with respect to a specific embodiment. Embodiment 1 An embodiment of a chain pot in which the tool pot 11 of the present invention is attached to a conveyor chain 51 which is generally used in a tool magazine device such as a horizontal spindle machining center will be described. FIG. 1 is a sectional view showing a side surface of a chain pot to which a tool pot 11 of the present invention is attached. FIG. 2 shows a partial view of the arrow X in FIG.
A plurality of chain pots to which the tool pot 11 of the present invention is attached are chained in a direction parallel to the paper surface of FIG. The tool pot 11 of the present invention comprises a tool pot main body 21 composed of a molding member molded with a thermosetting resin molding material shown in FIG. 1, a leaf spring 31 shown in FIG. 9, and a thermosetting resin shown in FIG. The engaging plate 4 is made of a resin molding material. A taper surface 2a for accommodating the short taper holder 71 shown in FIG. 7 is provided in the inner diameter portion of the tool pot body 21 constituting the tool pot 11 of the present invention in a direction parallel to the axial direction of the tool pot body 21, An engagement surface 2b orthogonal to the axial direction of the tool pot body 21,
Four engaging holes 2c are provided in a direction parallel to the axial direction, and an insertion hole 2d is provided at the axial center of the tool pot body 21. Further, a retaining ring groove for inserting the retaining ring 9 is provided on the circumference of the rear portion of the tool pot body 21. On the other hand, the leaf spring 31 is attached in a direction parallel to the axial direction of the tool pot main body 21 as shown in FIGS. The inclined portion 3d at the step position between the diameter portion 3b and the small diameter portion 3c, and the engagement surface 3f orthogonal to the axial direction of the tool pot body 21.
Then, as shown in FIG. 9, two engaging holes 3g are provided. In addition, the engaging plate 4 has an engaging surface 4a orthogonal to the axial direction of the tool pot body 21, and the tool pot body 21.
4 projections 4b in a direction parallel to the axial direction of
An insertion hole 4c is provided at the center of the engaging plate 4. The above-mentioned two leaf springs 31 are inserted into the protrusions 4b of the engaging plate 4 with the engaging holes 3g while aligning the engaging surface 3f of the leaf spring 31 with the engaging surface 4a of the engaging plate 4. To do. The engaging plate 4 into which the leaf spring 31 is inserted is attached to the engaging surface 3f of the leaf spring 31.
After the engagement surface 2b of the tool pot body 21 is brought into a facing state, the protrusion 4b is engaged with the engagement hole 2c of the tool pot body 21. After the engagement, bolts or the like are inserted into the insertion hole 4c of the engagement plate 4 and the insertion hole 2d of the tool pot body 21, and the tool pot 11 is formed by tightening with a nut or the like from the rear portion of the tool pot body 21. The tool pot 11 formed as described above is inserted into the inner diameter portion of the link 5a that constitutes the transport chain 51 shown in FIG. 1, and then the retaining ring 9 is inserted into the retaining ring groove provided in the rear portion of the tool pot body 21. Is attached and attached to the chain 51 to form a chain pot. With a tool changing arm (not shown), the short taper holder 71 shown in FIG.
When it is attached to the tape, the taper surface 2 of the tool pot body 21
Although the taper surface 7a of the short taper holder 71 is about to be inserted into a, the two leaf springs 31 provided in the direction parallel to the axial direction of the tool pot body 21 and pressing in the outer diameter direction are shown in FIG. The guide portion 3a of the leaf spring 3 shown in FIG.
Upon contact with the small diameter portion 7d provided on the inner diameter portion of the short taper holder 71, the leaf spring 31 begins to bend in the axial direction of the tool pot body 21 by elasticity. As the short taper holder 71 progresses, the small diameter portion 7d of the short taper holder holder 71 and the inclined portion 3d of the leaf spring 31 are
Move in contact with each other, and short taper holder 7
When the tapered surface 7a of No. 1 is inserted into the tapered surface 2a of the tool pot main body 21, the leaf spring 31 elastically moves the inclined portion 7c of the short taper holder 71 into the axial direction of the tapered surface 2a of the tool pot main body 21. The short taper holder 71 with the urging force being held toward the smaller diameter side.
Is stored. On the other hand, when the short taper holder 71 is detached from the tapered surface 2a of the tool pot body 21, the inclined portion 7c of the short taper holder 71 is
The inclined portion 3d of the leaf spring 31 that is biased and held toward the small diameter side with respect to the axial direction of the tapered surface 2a of the tool pot body 21 is elastic in the axial direction of the tool pot body 21 due to the thrust of the tool changing arm (not shown). Then, the tool pot 11 is removed. [Embodiment 2] An embodiment of a chain pot in which the tool pot 12 of the present invention is attached to a carrying chain 52 which is generally used in a magazine device such as a vertical spindle machining center will be described. FIG. 3 is a side view showing a state in which the tool pot 12 used in the second embodiment is attached to the transport chain 52, and FIG. 4 is a partial view of the arrow Y in FIG. FIG. 5 shows the tool pot 12 used in the second embodiment.
Is shown in a partial cross-sectional view of a side surface in a state of being rotated by 90 °. The tool pot 12 attached to the transport chain 52 is
A plurality of chains are arranged in a direction parallel to the paper surface of FIG.
The tool pot 12 of the present invention includes a tool pot main body 22 composed of a molding member molded with a thermosetting resin molding material shown in FIG. 5, a leaf spring 32 shown in FIG. 10, and a member used in the first embodiment. It is composed of a plywood 4, a shaft 2g and a roller 2h. As shown in FIG. 5, a short taper holder 71 shown in FIG. 7 is provided in the inner diameter portion of the tool pot main body 22 constituting the tool pot 12 of the present invention in a direction parallel to the axial direction of the tool pot main body 22. The taper surface 2a to be housed, the engagement surface 2b orthogonal to the axial direction of the tool pot body 22, the four engagement holes 2c and the tool pot body in the direction parallel to the axial direction of the tool pot body 22. An insertion hole 2d is provided at the center of the shaft 22.
Further, as shown in FIGS. 5 and 7, a hole portion for inserting the shaft 2f and a hole portion for attaching the shaft 2g in which the roller 2h is inserted are provided at two rear portions of the tool pot main body 22. ing. On the other hand, the leaf spring 32 is shown in FIG. 9 and FIG.
As shown in FIG. 1, the guide portion 3a is attached in a direction parallel to the axial direction of the tool pot main body 22 and is located at the step position between the guide portion 3a and the large diameter portion 3b and the small diameter portion 3c that press in the outer diameter direction. A certain inclined portion 3d, an engaging surface 3f orthogonal to the axial direction of the tool pot body 22, and two engaging holes 3
g is provided. As the engaging plate, the engaging plate 4 described in the first embodiment is used. The two leaf springs 32 described above are inserted into the protrusions 4b of the engaging plate 4 with the engaging holes 3g while aligning the engaging surface 3g of the leaf spring 32 with the engaging surface 4a of the engaging plate 4. To do. The engaging plate 4 having the leaf spring 32 inserted therein has an engaging surface 3f of the leaf spring 32.
After the engagement surface 2b of the tool pot main body 22 is brought into a facing state, the protrusion 4b is engaged with the engagement hole 2c of the tool pot main body 22. After the engagement, bolts or the like are inserted into the insertion hole 4c of the engagement plate 4 and the insertion hole 2d of the tool pot body 22, and the tool pot 12 is formed by tightening with a nut or the like from the rear portion of the tool pot body 22. In the tool pot 12 formed as described above, the shaft 2f is inserted into the hole provided in the rear portion of the tool pot body 22. On the other hand, U-shaped guide plate 8
The U-shaped bottom surface 8a is provided with a hole for inserting the shaft 2f therein, and a plurality of screw holes for attaching the attachment 5b of the transport chain 52 are provided in the U-shaped bottom surface 8a. Tool pot body 2
Both ends of the shaft 2f inserted into 2 are inserted into the holes of the U-shaped guide plate 8, and the tool pot 12 is held by the bottom surface 8a of the U-shaped guide plate 8. The bottom portion 8a of the U-shaped guy plate 8 and the attachment 5b of the transport chain 52
Are fixed with bolts or the like to form the chain pot of the second embodiment. The chain pot formed in this way runs in the state of the side view shown in FIG. 3, but when the tool exchange is performed by the tool exchange arm (not shown), the tool pot 12 is moved as shown in FIG. When inserted into the tool pot main body 22, the tool is changed at a position rotated by 90 ° from the bottom surface portion 8a with the shaft 2f and the hole portion of the U-shaped guy plate 8 as a base point. The turning is performed by using a cylinder or the like via a roller 2h inserted into a shaft 2g. The tool changer arm (not shown) is used for the short taper holder 71 shown in FIG.
When inserting into or removing from the tool pot 12 of the present invention, it is as described in the first embodiment. [Embodiment 3] An embodiment of a drum pot in which the tool pot 13 of the present invention is attached to a rotary drum base 53 which is generally used in a magazine device such as a horizontal spindle machining center will be described. FIG. 6 is a partial sectional view showing a side surface of the drum pot in which the tool pot 13 of the present invention is attached to the drum base 53. The tool pot 13 of the present invention comprises a tool pot main body 23 composed of a molding member molded with a thermosetting resin molding material shown in FIG. 6, the leaf spring 31 and the engaging plate 4 used in the first embodiment, and a presser foot. It is composed of a plate 6. As shown in FIG. 6, in the inner diameter portion of the tool pot body 23 constituting the tool pot 13 of the present invention, in the direction parallel to the axial direction of the tool pot body 23,
A taper surface 2a for housing the short taper holder 72 shown in FIG. 8 and an insertion hole 2m for inserting the engagement plate 4 are provided in a direction parallel to the axial direction of the tool pot body 23. Further, in the rear part of the insertion hole 2m, the insertion hole 2d and the tool pot body 23 are formed at the axial center of the tool pot body 23.
A plurality of screw holes 2k are provided in a direction parallel to the axis of. On the other hand, a retaining ring groove for inserting the retaining ring 9 is provided on the outer circumference of the tool pot body 23. The holding plate 6 is provided with four engaging holes that engage with the engaging hole 3g of the leaf spring 31 and the protrusion 4b of the engaging plate 4, and an insertion hole at the axial center of the holding plate 6. The inner diameter surface of the insertion hole 2m of the tool pot body 23 and the outer diameter surface of the engagement plate 4 are designed to be movable in a direction parallel to the axis of the tool pot body 23. In the leaf spring 31 described above, the engaging hole 3g is inserted into the protrusion 4b of the engaging plate 4 while the engaging surface 3f of the leaf spring 3 is aligned with the engaging surface 4a of the engaging plate 4, and is pressed down. The plate spring 31 is pressed by the plate 6 and attached to the engaging plate 4 with a bolt or the like through the insertion hole of the pressing plate 6. The engaging plate 4 with the leaf spring 31 inserted therein is
6 is inserted into the insertion hole 2m of the tool pot main body 23, and is attached from the rear portion of the tool pot main body 23 with a bolt or the like through the insertion hole 2d. The engaging plate 4 can be moved by the adjusting screw 10 attached to the. On the tapered surface 2a of the tool pot 13, the short taper holder 7 shown in FIG.
The rear portion of the tool pot main body 23 is positioned such that the inclined portion 7c of the short taper holder 72 is biased and held toward the smaller diameter side of the tapered surface 2a of the tool pot main body 23 when the two tapered surfaces 7a come into contact with each other. Adjustment screw 10 provided on
After adjusting with, fix the position with bolts. The tool pot 13 formed as described above is attached to the drum base 53 shown in FIG. 6, and then the retaining ring 9 is inserted into the retaining ring groove provided in the tool pot 13 to form the drum pot. When the short taper holder 72 shown in FIG. 8 is inserted into or removed from the tool pot 13 of the present invention by a tool changing arm (not shown), it is as described in the first embodiment. As the members of the tool pot bodies 21, 22, and 23 used in each of the above-mentioned embodiments, molding members molded with a thermosetting resin molding material are used, but a metal member or a thermoplastic resin molding material is used. When using a molded member shaped in
The use of a metal member is not preferable because the cost of the processing cost increases and the weight of the chain member also drives the chain pot. On the other hand, when a molding member molded with a thermoplastic resin molding material is used, dimensional accuracy and the like tend to change over time, which is not preferable in terms of function. Further, as the member of the leaf spring 3 used in each example, either a spring steel material or a molding member molded with a carbon fiber reinforced resin molding material may be used, but there is no problem in function such as strength and repeated life. The molding member molded with the fiber-reinforced resin molding material is more stable in terms of dimensional accuracy. The taper surface 2a of the tool pot main body 21, 22 is attached to the taper surface 7 of the short taper holder 71.
When a comes into contact, the leaf springs 31 arranged in the inner diameter portions of the tool pot bodies 21 and 22 are elastically pressed in the outer diameter direction of the tool pot bodies, and the inner diameter portions of the short taper holder 71 are Large diameter part 7b and small diameter part 7d arranged in
The inclined portion 7c at the step position of the tool pot main body 2
The short taper holders 71 do not fall off because they are arranged so as to be able to urge and hold the taper surfaces 2a provided on the first and second parts 22a toward the small diameter side. On the other hand, as used in the third embodiment, the inclined portion 7c at the step position between the large diameter portion 7b and the small diameter portion 7d arranged in the inner diameter portion of the short taper holder 72 shown in FIG. Even in the state, the position of the engaging plate 4 to which the leaf spring 32 disposed inside the tool pot body 23 is attached enables movement adjustment in a direction parallel to the axial direction of the tool pot body 23. The short taper holder 7
The inclined portion 7c at the step position between the large diameter portion 7b and the small diameter portion 7d disposed in the inner diameter portion 2 of the tool pot main body 23 can be adjusted to hold the bias toward the smaller diameter side of the tapered surface 2a. Short taper holder 7 because it is installed
2 never falls out. Further, when the weight of the cutting tool attached to the short taper holders 71 and 72 is large, the holding load of the leaf springs can be adjusted by considering the thickness of the leaf springs 31 and 32. 7c is the taper surface 2a of the tool pot body
It is possible to hold the bias toward the smaller diameter side. Among the parts constituting the tool pot of the present invention, the parts necessary for holding the short taper holder are thermosetting resin molding materials in the first and second embodiments. Shaped tool pot bodies 21, 22
And the engaging plate 4 and the leaf spring 31. On the other hand, also in the third embodiment, the tool pot main body 23 and the engagement plate 4 formed of the thermosetting resin molding material,
Since only four parts, the leaf spring 32 and the holding plate 6, are configured, the number of parts is small as in the first embodiment, and it is effective in improving the cost of parts and labor saving in assembly work. Further, even when parts such as leaf springs are replaced during maintenance and inspection, since the leaf springs 31 or 32 can be removed together with the engaging plate 4 from the front part of the tool pot, the parts can be easily replaced and workability is improved. Greatly contributes to the improvement. On the other hand, the tool pot main body 2 constituting the tool pot used in each of the embodiments
1, 22, 23 and the engaging plate 4 do not need to be machined because they are molded products made of thermosetting resin molding material, and have a specific gravity of about 1.4 and about 1 of the metal member. In addition to being able to reduce the weight to / 5, it largely contributes to cost reduction through labor saving in the processing process. [0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a side surface of a tool pot 11 used in a first embodiment attached to a carrying chain 51 of a tool magazine device. FIG. 2 is a partial view showing the arrow X in FIG. FIG. 3 is a side view showing a state in which the tool pot 12 used in the second embodiment is attached to a transport chain 52 of a tool magazine device. FIG. 4 is a partial view showing the arrow Y in FIG. FIG. 5 shows the tool pot 12 used in Example 2 at 90 °
The side view of the swiveled state is shown in a partial cross-sectional view. FIG. 6 is a partial cross-sectional view showing a side surface of the tool pot 13 used in the third embodiment, which is attached to a drum base 54 of a tool magazine device. FIG. 7 is a sectional view showing a side surface of a short taper holder 71 used in Examples 1 and 2. FIG. 8 is a short taper holder 71 used in Example 3.
Is shown in a sectional view. FIG. 9 shows a front view of a leaf spring 31 used in Examples 1 and 3. FIG. 10 shows a front view of the leaf spring 32 used in the second embodiment. 11 is a sectional view taken along line AA of FIGS. 8 and 10. FIG. [Explanation of reference numerals] 11, 12, 13, tool pots 21, 22, 23, tool pot bodies 2a, 7a tapered surfaces 2b, 3f, 4a engaging surfaces 2c, 3g, 6a engaging holes 2d, 4c, 6b Insertion hole 2f, 2g Shaft 2h Roller 2k Screw hole 2m Insertion hole 31,32 Leaf spring 3a Guide part 3b, 7b Large diameter part 3c, 7d Small diameter part 3d, 7c Inclined part 4 Engaging plate 4b Projection part 51, 52 Conveyance Chain 53 Drum base 5a Link 5b Attachment 6 Presser plates 71, 72 Short taper holder 8 U-shaped guide plate 8a Bottom part 9 Retaining ring 10 Adjustment screw

Claims (1)

Claim: What is claimed is: 1. A tool pot for accommodating a cutting tool, which houses a short taper holder having a hollow inner diameter without a pull stud. A plurality of leaf springs, which are provided in a direction parallel to the axial direction of the tool pot main body, are provided in the inner diameter portion and have inclined portions at the step positions of the large diameter portion and the small diameter portion that are pressed in the outer diameter direction. A tool pot characterized in that the elastic force of the leaf spring holds an inclined portion at a step position between a large diameter portion and a small diameter portion arranged on the inner diameter side of the short taper holder. 2. A tool pot main body, and a plurality of large diameter portions and small diameter portions which are provided on the inner diameter portion of the tool pot main body in a direction parallel to the axial direction of the tool pot main body and which are pressed in the outer diameter direction. A plurality of leaf springs having an inclined portion at the step position,
2. The tool pot according to claim 1, wherein said leaf spring is composed of three parts of an engaging plate arranged to engage with a predetermined position of the inner diameter portion of the tool pot body. 3. A tool pot, wherein a plurality of slant parts are provided in a direction parallel to the axial direction of the tool pot main body and are inclined in a step position between a plurality of large diameter parts and a small diameter part that are pressed in the outer diameter direction. Of the plate spring, and the engaging plate and the pressing plate arranged to engage the plate spring at a predetermined position of the inner diameter portion of the tool pot body are moved in a direction parallel to the axial direction of the tool pot body. The tool pot according to claim 1, which can be adjusted.