JP2005040803A - Trimming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a trimming device which can suppress the deterioration of efficiency of the trimming processing and the degradation of processing accuracy. <P>SOLUTION: The trimming device 10 is provided with a cutting tool 11, which cuts the opening end 1a of a can body 1 formed into a cylinder shape with a bottom, a guide part 12, which is arranged inside the opening part 1b of the can body 1 and guides the opening part 1b, a suction duct 13 for sucking chips generated by the cutting with the cutting tool 11. The trimming device 10 is so constituted that the cutting tool 11 and the guide part 12 are arranged inside the suction duct 13. An insertion/detachment hole 17b, in which at least the opening part 1b of the can body 1 is inserted/detached to/from its inside, is formed to the suction duct 13. The opening peripheral edge part of the insertion/detachment hole 17b is made as a chip shielding plate 17c extended toward the can body 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a trimming apparatus for cutting an open end of a can body formed in a bottomed cylindrical shape.
[0002]
[Prior art]
In two-piece cans and bottle cans filled with soft drinks, generally, a metal plate made of pure Al or an Al alloy is squeezed and ironed to form a can body, and the opening of the can body is formed. After the neck-in process and the flange process, the contents are filled therein. After that, in the case of a two-piece can, a can lid is wound around the opening of the can body to form a can. In the case of a bottle can, the cap is screwed after further screw forming and the like, and the bottle with the cap A can is formed.
Here, in each step of forming the two-piece can and the bottle can, a trimming process for cutting the opening end is performed to adjust the height of the can body as necessary ( For example, see Patent Document 1).
[0003]
As an apparatus for performing this trimming process, for example, a configuration as shown in FIG. 3 is conventionally known.
In this figure, a conventional trimming apparatus 100 is disposed inside a cutting tool 102 for cutting an opening end 101a of a can body 101 formed in a bottomed cylindrical shape, and an opening 101b of the can body 101. A guide portion 103 that guides 101b and a suction duct 104 that sucks chips generated during trimming are provided, and a cutting tool 102 and a guide portion 103 are arranged inside the suction duct 104. .
A holding table (not shown) for holding the can body 101 is disposed below the trimming apparatus 100 so as to be able to advance and retract. The table is driven forward together with the can body 101, as shown in FIG. In addition, the guide portion 103 is inserted into the opening 101 b of the can main body 101, so that the can axis of the can main body 101 substantially coincides with the rotation axis O of the trimming apparatus 100.
[0004]
The suction duct 104 has a cutting tool 102 and a guide portion 103 disposed therein, a lower end 104d as an open end, and an introduction channel 104c through which the upper portion of the can body 101 is inserted and removed from the lower end 104d, An opening 104b at one end communicates with the introduction flow path 104c, and the other end includes a suction flow path 104a communicated with a suction means (not shown). In this configuration, the cutting tool 102 and the guide part 103 are arranged at a position facing the opening 104b of the suction channel 104a, whereby chips generated by the cutting tool 102 are caused to pass through the suction channel 104a. It is designed to suck well.
[0005]
[Patent Document 1]
Japanese Examined Patent Publication No. 3-6851 [0006]
[Problems to be solved by the invention]
By the way, according to the conventional trimming apparatus, since the gap between the inner surface of the introduction channel 104c and the outer peripheral surface of the can body 101 is large, chips generated during the trimming process are not satisfactorily sucked into the suction channel 104a. In some cases, it would fall down, that is, onto the holding table. For this reason, when the can body 101 is held on the holding table next time, there is a problem that it is difficult to hold the can body 101 or that the production environment is deteriorated or the production environment is deteriorated. there were.
[0007]
Here, when trimming is performed, that is, when the cutting tool 102 is rotationally driven around the rotation axis O and the opening end 101a of the can body 101 is cut, the inside of the can body 101 is at a lower pressure than the external atmospheric pressure. Accordingly, after the trimming process, when the can body 101 is driven backward, among the generated chips, for example, the chips caught on the opening 104b of the suction channel 104a are sucked toward the opening 101b of the can body 101. There was a problem of being. In this case, there is a problem that chips are dropped on the holding table and the efficiency of the production is further promoted.
In addition, with regard to the dropping of the chips, it may be considered that the chips flow into the can body 101. In this case, it is necessary to expand the man-hours and processes for inspecting the presence of the chips in the can body 101, and the production. There may be a problem that the facility becomes large.
[0008]
In addition, the chips generated during the trimming process may be wound around the cutting tool 102 or the guide part 103 depending on the shape or the like. In this state, the next can body 101 is driven forward, and the can body 101 is shown in FIG. When the trimming apparatus 100 is arranged as shown in FIG. 3, the chips are held between the open end 101a of the can body 101 and the cutting tool 102. Therefore, even if the trimming process is performed in this state, there is a problem in that the opening end 101a of the can body 101 cannot be satisfactorily cut, resulting in a decrease in the processing accuracy.
[0009]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a trimming apparatus that can reduce the efficiency of trimming and suppress the occurrence of a decrease in the machining accuracy.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems and achieve such an object, the present invention proposes the following means.
The invention according to claim 1 is a cutting tool that cuts an opening end of a can body formed in a bottomed cylindrical shape, a guide portion that is disposed inside the opening of the can body and guides the opening, A trimming device having a configuration in which the cutting bit and the guide portion are disposed inside the suction duct. An insertion / removal hole is formed in which at least the opening of the can body is inserted / removed inside, and an opening peripheral edge of the insertion / removal hole is a chip shielding plate extending toward the can body. Features.
[0011]
According to the trimming device according to the present invention, since the chip shielding plate is provided, it is possible to suppress the chips generated during the trimming process from flowing out of the suction duct, and on the holding table that holds the can body. It is possible to suppress the accumulation of chips. Therefore, when the can body is held on the holding table next time, it can be satisfactorily held, it is possible to suppress the deterioration of the production environment, and the occurrence of low production efficiency is suppressed. be able to.
[0012]
The invention according to claim 2 is the trimming device according to claim 1, wherein the guide portion is disposed inside the suction duct so that the tip portion extends from the insertion / removal hole to the outside of the suction duct, An air vent channel in which the side surface of the guide portion and the tip surface communicate with each other is formed at the tip portion of the guide portion.
[0013]
According to the trimming device of the present invention, since the air vent channel is formed in the guide portion, when the can body is removed from the insertion / removal hole of the suction duct after trimming, the opening end of the can body is It is possible to communicate the inside of the can body with the outside of the suction duct until reaching the lower end of the guide portion. Therefore, during the trimming process, the internal pressure of the can body is reduced to the suction duct until the opening end of the can body reaches the lower end of the guide portion, even though the pressure inside the can body is lower than the pressure outside the suction duct. It becomes possible to make it almost equal to the external atmospheric pressure. As a result, for example, the chips wound around the cutting tool during trimming are avoided from being sucked toward the opening of the can body when the can body is removed from the insertion / removal hole. It is possible to prevent chips from falling on the holding table to be held, and it is possible to reliably suppress the occurrence of low production efficiency described above.
[0014]
In addition, it is possible to reliably suppress chips from flowing into the inside of the can body. In particular, when the can body has a bottle shape, the diameter of the can opening is gradually reduced as the process progresses, so if chips flow into the can at a stage where the amount of diameter reduction is small, the chips must be removed. However, in the trimming apparatus according to the present invention, the inflow of the chips into the can can be suppressed, so that the occurrence of such a problem can be avoided.
[0015]
According to a third aspect of the present invention, there is provided a cutting tool for cutting an opening end of a can body formed in a bottomed cylindrical shape, a guide portion arranged inside the opening of the can body and guiding the opening, and the cutting A suction duct for sucking chips generated by cutting of a cutting tool, and the cutting tool and the guide portion are arranged inside the suction duct, wherein the suction duct includes: An insertion / removal hole into which at least the opening of the can body is inserted / removed is formed, and the opening of the insertion / removal hole extends inward of the suction duct and toward the opening end of the can body. And a scraper that cuts or divides the chips generated from the opening end of the can body by the cutting tool from the opening end of the can body.
[0016]
According to the trimming device according to the present invention, since the scraper is provided, it is possible to suppress the chips generated when the opening end of the can body is cut by the cutting tool from being wound around the cutting tool. It becomes possible to remove reliably from the opening end of the can body. Therefore, when trimming the next can body, it is possible to suppress the occurrence of chips remaining between the open end of the can body and the cutting bite, and the accuracy of the trimming process can be reliably reduced. Can be suppressed.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a schematic configuration of the trimming apparatus shown as the first embodiment of the present invention.
First, a schematic configuration of the bottle can body 1 provided for the trimming apparatus 10 will be described. The bottle can body 1 is formed in a bottomed cylindrical shape, and has a large-diameter barrel portion 1c, a shoulder portion 1d that gradually decreases in diameter from the upper end of the barrel portion 1c toward the upper direction of the can axis, and the shoulder portion 1d. An opening 1b is formed extending from the upper end in the can axis direction and having a diameter smaller than that of the body 1c.
[0018]
Next, the trimming apparatus 10 shown in FIG. 1 is arranged inside a cutting tool 11 for cutting the opening end 1a of the bottle can body 1 and the opening 1b of the can main body 1 and guides the opening 1b. 12 and a suction duct 13 for sucking chips generated during trimming, and a cutting tool 11 and a guide part 12 are disposed inside the suction duct 13.
A holding table (not shown) that holds the bottom portion of the bottle can body 1 is disposed below the trimming device 10 so as to be able to advance and retreat. When the table is driven forward together with the bottle can body 1, As shown in FIG. 1, the guide portion 12 is inserted into the opening 1 b of the bottle can body 1, whereby the can axis of the bottle can body 1 is made to substantially coincide with the rotation axis O of the trimming device 10.
[0019]
Here, the cutting tool 11 and the guide part 12 are arranged in a main body part 14 supported so as to be rotatable around the rotation axis O. The main body portion 14 has a substantially cylindrical multi-stage shape. In FIG. 1, the large diameter portion 14a, the medium diameter portion 14b, and the small diameter portion 14c are arranged coaxially with respect to the rotation axis O in this order from the top to the bottom. It has a configuration with.
The upper portion of the large-diameter portion 14a is connected to the drive portion 15 that supports the main body portion 14 so as to be rotatable around the rotation axis O, and the tip portion of the cutting bit 11, that is, the blade portion protrudes from the lower end surface. In this state, the cutting tool 11 is arranged inside. In this embodiment, three cutting tools 11 are arranged on the same circumference with the rotation axis O as the center.
[0020]
Further, the guide portion 12 is disposed on the outer peripheral surface side of the small diameter portion 14 c, and the bearing 16 is disposed between the outer peripheral surface of the small diameter portion 14 c and the inner peripheral surface of the guide portion 12. That is, the outer peripheral surface of the small diameter portion 14c and the inner peripheral surface of the bearing 16 are in contact with each other, and the inner peripheral surface of the guide portion 12 and the outer peripheral surface of the bearing 16 are in contact with each other. The portion 14 is rotated around the rotation axis O together with the inner peripheral surface of the bearing 16, but the guide portion 12 is not substantially rotated.
[0021]
Here, the guide portion 12 is formed in a cylindrical shape, and, as shown in FIG. An opening space 12a is formed, and an air vent channel 12b communicating with the space 12a is formed on the side surface of the tip of the guide portion 12.
The suction duct 13 has an introduction flow path 17 in which the cutting tool 11 and the guide part 12 are disposed, an opening 18a at one end thereof communicating with the introduction flow path 17, and the other end illustrated. A suction channel 18 communicating with the suction means that does not. In this configuration, the cutting bit 11 and the guide portion 12 are disposed at a position facing the opening 18 a of the suction channel 18, and thereby, chips generated by the cutting bit 11 are better improved by the suction channel 18. It comes to be sucked.
[0022]
The introduction channel 17 has a through hole 17b formed in the lower end surface 17a, and is an insertion / removal hole through which the opening 1b of the bottle can body 1 is inserted into and removed from the suction duct 13 (hereinafter referred to as the insertion / removal hole). The through hole 17b is referred to as “insertion / removal hole 17b”). The peripheral edge of the opening of the insertion / removal hole 17b is a chip shielding plate 17c extending toward the outer peripheral surface of the bottle can opening 1b. As shown in FIG. 1, the chip shielding plate 17 c is configured so that the opening 1 b of the bottle can 1 and the shoulder of the opening 1 b of the bottle can 1 are in contact with the lower end of the cutting tool 11, that is, the cutting edge. The configuration is located at the boundary with the portion 1d, and the configuration allows the gap between the outer peripheral surface of the bottle can body 1 and the insertion / removal hole 17b to be minimized during trimming.
[0023]
In the above configuration, the guide portion 12 is disposed inside the introduction channel 17 so that the tip end portion is located outside the introduction channel 17 through the insertion / removal hole 17b. The air vent channel 12 b formed at the distal end opens to the side surface of the distal end of the guide unit 12 located outside the introduction channel 17.
[0024]
Next, the operation of each component when trimming the bottle can 1 with the trimming device 10 configured as described above will be described.
[0025]
First, the bottom of the bottle can body 1 formed in the step before the trimming step is held on a holding table (not shown), and the bottle can body 1 is held together with the holding table in the can axis direction, that is, toward the trimming device 10. Drive forward. At this time, as shown in FIG. 1, the guide portion 12 is inserted into the opening 1 b of the bottle can body 1, and the inner peripheral surface of the opening 1 b is guided by the outer peripheral surface of the guide portion 12. The one can axis is made to substantially coincide with the rotation axis O of the trimming apparatus 10, and the bottle can body opening end 1 a is brought into contact with the cutting edge of the cutting tool 11.
[0026]
Thereafter, the drive unit 15 is driven by a control unit (not shown), and the main body unit 14 is driven to rotate about the rotation axis O. Accordingly, the cutting tool 11 disposed on the main body unit 14 is rotated about the rotation axis O. The bottle can body opening end 1 a is cut by the cutting tool 11. Here, since the guide portion 12 is disposed on the main body portion 14 via the bearing 16, the guide portion 12 is not rotationally driven around the rotation axis O, and is a bottle can body at the time of cutting by the cutting tool 11, that is, at the time of trimming. The deformation of the opening 1b is suppressed, and the processing is highly accurate.
During the trimming process, the generated chips are continuously sucked by the suction duct 13, while the chips that are about to fall downward in the direction of the rotation axis O due to the shape of the chips and the like are inserted / removed holes 17b. Since the peripheral edge part is made into the chip shielding board 17c, the outflow from the suction duct 13 is suppressed.
[0027]
When the trimming process is finished, the holding table is driven backward, the bottle can opening 1b is removed from the insertion / removal hole 17b, and the bottle can 1 is separated from the trimming device 10. Here, during the trimming process, the internal pressure of the bottle can body 1 is lower than the pressure outside the suction duct 13, but in the process of separating the bottle can body 1, the bottle can body opening end 1 a is connected to the guide portion 12. When the position where the air vent channel 12b formed on the lower side surface is reached (see the two-dot chain line in FIG. 1), the outside air outside the suction duct 13 becomes the air vent channel 12b and the space of the guide portion 12. It will flow into the inside of the bottle can body 1 through the portion 12a, and the internal pressure of the can body 1 rises before the bottle can body opening end 1a reaches the lower end of the guide portion 12, and the suction duct 13 It is almost the same as the atmospheric pressure outside.
[0028]
As described above, according to the trimming apparatus according to the present embodiment, since the peripheral edge portion of the insertion / removal hole 17b of the suction duct 13 is the chip shielding plate 17c, the chips generated during the trimming process are bottle can bodies. It is possible to suppress falling onto the holding table that holds 1, and it is possible to collect chips efficiently by the suction duct 13. Accordingly, when the bottle can body 1 is held on the holding table next time, the bottle can body 1 can be held well, and the deterioration of the production environment can be suppressed. Can be suppressed.
[0029]
Further, since the air vent channel 12b is formed in the guide portion 12, when the bottle can body 1 is removed from the insertion / removal hole 17b of the suction duct 13 after trimming, the opening end 1a of the bottle can body 1 is removed. Can reach the lower end of the guide portion 12 to allow the inside of the bottle can body 1 to communicate with the outside of the suction duct 13. Therefore, at the time of trimming, the inside of the bottle can body 1 is at a pressure lower than the outside air pressure, but the internal pressure of the bottle can body 1 is reached until the opening end 1a of the can body 1 reaches the lower end of the guide portion 12. Can be made substantially equal to the atmospheric pressure outside the suction duct 13. Thereby, for example, chips wound around the cutting tool 11 during trimming are sucked toward the opening 1b of the bottle can body 1 when the bottle can body 1 is removed from the insertion / removal hole 17b. Thus, it is possible to prevent chips from falling on the holding table that holds the can body 1, and to reliably suppress the occurrence of low production efficiency.
Moreover, it can suppress reliably that a chip flows into the inside of the bottle can body 1. FIG.
[0030]
Next, although 2nd embodiment of this invention is described, the same code | symbol is attached | subjected to the site | part similar to above-mentioned 1st embodiment, and the description is abbreviate | omitted.
As shown in FIG. 2, the trimming device 20 according to the second embodiment has an inside of the suction duct 13 and an opening of the insertion / removal hole 17 b formed in the introduction flow path 17 of the suction duct 13. Is provided with a scraper 21 provided to extend toward the opening end 1a of the bottle can body 1 disposed on the surface. In this embodiment, three scrapers 21 are arranged on the same circumference with the rotation axis O as the center.
[0031]
The scraper 21 is formed in a substantially L shape in cross-section, and the inner wall surface 21a facing the outer peripheral surface of the opening 1b of the bottle can body 1 extends radially inward as it goes upward in the rotation axis O direction. The scraper inner wall surface 21a has an existing tapered surface shape, and the distance from the outer peripheral surface of the bottle can body opening portion 1b gradually decreases as it goes toward the opening end 1a of the bottle can body 1 disposed in the apparatus 20. It has become. The upper end portion of the scraper 21 is a blade portion, and the blade portion is radially outward of the opening end 1a of the bottle can body 1 and below the blade portion of the cutting bit 11, and the opening end 1a and the cutting bit. It is the structure arrange | positioned in the vicinity of 11 blade parts.
[0032]
In the above configuration, the opening end 1a of the bottle can body is cut by the cutting tool 11 rotated about the rotation axis O by the driving unit 15, and the generated chips are sequentially cut by the blade portion of the scraper 21. Or it will be divided from the bottle can body opening end 1a.
[0033]
As described above, according to the trimming device according to the present embodiment, since the scraper 21 is provided, chips generated when the bottle can body opening end 1a is cut by the cutting bit 11 are wound around the cutting bit 11. It becomes possible to suppress the shampooing and to surely remove from the bottle can opening end 1a. Therefore, when the next bottle can body 1 is trimmed, it is possible to suppress the occurrence of chips remaining between the opening end 1a of the can body and the cutting tool 11, and the trimming process can be performed. Can be reliably suppressed.
[0034]
Further, since the scraper inner wall surface 21a has the tapered surface shape, the gap between the outer peripheral surface of the bottle can body opening 1b and the scraper 21 can be suppressed to a minimum, and the chips generated by the cutting tool 11 It is suppressed to a minimum that the material that has been divided or the like falls from the insertion / removal hole 17b, thereby reliably suppressing the occurrence of low production efficiency described in the first embodiment.
[0035]
The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, not only the bottle can 1 but also a two-piece can body.
[0036]
【The invention's effect】
As is clear from the above description, according to the trimming device according to the present invention, it is possible to minimize the fall of chips on the holding table, and to suppress the occurrence of low production efficiency. In addition, when trimming the next can body, it becomes possible to suppress the occurrence of chips remaining between the open end of the can body and the cutting bite, and the trimming accuracy is reduced. Can be reliably suppressed. Moreover, it can suppress reliably that a chip flows into the inside of a can main body.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a trimming apparatus shown as a first embodiment of the present invention.
FIG. 2 is a schematic configuration diagram showing a trimming apparatus shown as a second embodiment of the present invention.
FIG. 3 is a schematic configuration diagram showing a trimming device in a conventional example according to the present invention.
[Explanation of symbols]
1 Can body (bottle can body)
DESCRIPTION OF SYMBOLS 1a Open end 1b Opening part 10 and 20 Trimming device 11 Cutting tool 12 Guide part 12b Air vent flow path 13 Suction duct 17b Insertion / removal hole 17c Chip shielding board 21 Scraper

Claims (3)

A cutting tool for cutting the open end of the can body formed in a bottomed cylindrical shape,
A guide portion that is disposed inside the opening of the can body and guides the opening;
A suction duct for sucking chips generated by cutting the cutting tool,
A trimming device having a configuration in which the cutting tool and the guide portion are disposed inside the suction duct,
The suction duct is formed with an insertion / removal hole into which at least the opening of the can body is inserted / removed.
The trimming apparatus, wherein an opening peripheral edge of the insertion / removal hole is a chip shielding plate extending toward the can body. The trimming apparatus according to claim 1, wherein
The guide portion is disposed inside the suction duct so that the tip portion extends from the insertion / removal hole to the outside of the suction duct,
A trimming apparatus, wherein an air vent channel in which a side surface of the guide portion communicates with the tip surface is formed at a tip portion of the guide portion. A cutting tool for cutting the open end of the can body formed in a bottomed cylindrical shape,
A guide part that is arranged inside the opening of the can body and guides the opening;
A suction duct for sucking chips generated by cutting the cutting tool,
A trimming device having a configuration in which the cutting tool and the guide portion are disposed inside the suction duct,
The suction duct is formed with an insertion / removal hole into which at least the opening of the can body is inserted / removed.
At the opening of the insertion / removal hole, provided inside the suction duct and extending toward the opening end of the can body, the chips generated from the opening end of the can body by the cutting tool, A trimming device comprising a scraper for cutting or cutting from an open end of the can body.

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