Trimming apparatus and method for rectangular containers

Abstract

To perform high-quality trimming while suppressing occurrence of matching blurs, etc., in a relatively simple configuration without requiring a skill or a high-grade cam mechanism.SOLUTION: A trimming device 1 for a square container which cuts a square container 100 along a trim line 100A includes: a die 10 in which an outer periphery of the square container 100 is stored and which is disposed at a lower side along the trim line 100A; a punch 20 which is movable within a plane in parallel with a bottom face 101; a long axis direction drive unit 61 which moves the punch 20 in a long axis direction of the square container 100; a first short axis direction drive unit 62 which is disposed at a proximal side of the long axis direction drive unit 61 and moves the punch 20 in a short axis direction; and a second short axis direction drive unit 63 which is disposed side by side with the first short axis direction drive unit 62 in the long axis direction at a distal side from the long axis direction drive unit 61 and moves the punch 20 in a short axis direction of the square container 100.SELECTED DRAWING: Figure 4

Description

Technical Field

[0007]

[0001] The present invention relates to trimming of a rectangular container having one end open and a bottom at the other end. technology It relates to.

Background Art

[0002] As shown in FIG. 1, in drawing forming, trimming is performed by cutting (trimming off) the end portion on the open end side of the side wall of the drawn molded product to obtain a product.

[0003] Conventionally, trimming of a drawn product (trimming, trim) is performed, for example, in a transfer press where drawing forming is performed, by converting the vertical movement of a slide into a circumferential movement (arc movement) of a trimming punch along the outer shape of the product using a cam (so-called wobbling cam).

[0004] Also, Patent Document 1 describes an apparatus that performs trimming by converting the rotational movement of an electric motor into a circumferential movement of a punch using a gear mechanism and a link mechanism instead of the cam as described above.

[0005] Also, regarding a rectangular container (a container having a rectangular cross-sectional shape parallel to the bottom surface), as an apparatus for trimming the rectangular container in a process separate from the drawing forming process, there is also an apparatus that cuts from two directions perpendicular to the opposing side walls of the rectangular container (see Patent Document 2).

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] Regarding the so-called wobbling cams used for trimming, a mechanism is required to convert the vertical motion of the press slide into the arc motion of the die, and the configuration is complex. As a result, skilled technicians and workers are needed for the design, adjustment, and maintenance of the cams and mechanisms, and experience is required for the design of the dies used in trimming methods that utilize this type of cam. Furthermore, because the vertical motion of the press slide is converted into the arc motion of the die by a cam, a long press stroke is required, and this trimming method is basically considered suitable for cylindrical (circular cross-sectional shape parallel to the bottom surface) drawn products.

[0008] Furthermore, the invention described in Patent Document 1 requires a complex gear mechanism and link mechanism to convert the rotational motion of the electric motor into the circumferential motion of the punch. As a result, if it is necessary to change the thickness of the plate or the shape of the rectangular container, even if the change is slight, it becomes necessary to readjust the gear mechanism and link mechanism, redesign it specifically for that purpose, or remanufacture the gear and link parts, which is a time-consuming and troublesome process. Moreover, when performing work such as replacing parts of the gear mechanism or link mechanism, it may be necessary to stop the production line for a relatively long time, which could lead to a decrease in production efficiency. Furthermore, the device described in Reference 1 requires a complex and highly precise angled punch to make an oblique cut at the start of trimming, which increases the running costs of the equipment and, consequently, the manufacturing costs.

[0009] Furthermore, the method described in Patent Document 2, which trims from two orthogonal directions, has the drawback that the trimming process is divided into two steps, making it prone to the generation of matching burrs (sharp burrs caused by errors at the junction of the cutting lines from the two directions). As a result, relatively troublesome measures are required to suppress the generation of matching burrs, such as creating a relatively large step in the trimmed section beforehand or reducing the amount of material removed during cutting, at the expense of the finished product.

[0010] This invention has been made in view of the above circumstances, and is a trimming device for rectangular containers that has a relatively simple structure, does not require skilled personnel or advanced cam mechanisms, and can perform high-quality trimming while suppressing the generation of matching burrs, etc. and direction Law The purpose is to provide. [Means for solving the problem]

[0011] Therefore, the trimming device for rectangular containers according to the present invention is A trimming device for a rectangular container, having an open end and a bottom at the other end, and a rectangular cross-sectional shape parallel to the bottom surface, cuts the rectangular container along a plane that includes a predetermined trim line parallel to the bottom surface, A die is integrally supported with respect to the trimming device body, accommodates the outer circumference of the rectangular container, and is arranged along the trim line. A punch housed within a rectangular container, having a predetermined gap with respect to the inner cross-sectional shape of the rectangular container, the punch being supported by the trimming device body so as to be movable in a plane parallel to the bottom surface, The punch is moved along the longitudinal axis in the cross-sectional shape of the rectangular container by a longitudinal axis drive unit, A first short-axis drive unit moves the punch along the short axis direction in the cross-sectional shape of the rectangular container, A second short-axis drive unit is arranged alongside the first short-axis drive unit along the long axis and moves the punch along the short axis in the cross-sectional shape of the rectangular container, Composed of A trimming device for a rectangular container, The aforementioned longitudinal axis drive unit is driven to move the punch in the longitudinal axis direction, and in cooperation with the die, trims one short side of the rectangular container along the trim line. The movement of the punch is used to form a weak point on the opening side of one short side of the rectangular container above the trim line, which is thinner than the other side. It is characterized by the following:

[0012] In the trimming device for rectangular containers according to the present invention, The longitudinal axis drive unit, the first short axis drive unit, and the second short axis drive unit can be characterized by being driven independently of each other.

[0013] In the trimming device for rectangular containers according to the present invention, The aforementioned longitudinal axis drive unit is driven to move the punch in the longitudinal axis direction, and in cooperation with the die, one short side of the rectangular container is trimmed along the trim line. From the state of the punch after the trimming is completed, the first short-axis drive unit and the second short-axis drive unit, one of which is closer to the one short side, are driven to move the punch in the short-axis direction and tilt the punch, and in cooperation with the die, the one short side of one long side of the rectangular container connected to the one short side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is furthest from the short side, are driven to move the punch in the short-axis direction, returning the punch from an inclined state to a state parallel to the long axis, while in cooperation with the die, the uncut portion of the long side is trimmed along the trim line. From the state of the punch after trimming is complete, the longitudinal axis drive unit is driven in the reverse direction to move the punch in the longitudinal axis direction, and in cooperation with the die, the other short side of the rectangular container is trimmed along the trim line. From the state in which the trimming is completed, the first short-axis drive unit and the second short-axis drive unit are driven to move the punch parallel to the other long side of the rectangular container, and in cooperation with the die, the uncut portion of the other short side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and one of the second short-axis drive units that is closer to the other short side are driven to move the punch in the short-axis direction and tilt the punch, and in cooperation with the die, the other short side of the other long side is trimmed along the trim line. From the state of the punch after the trimming, drive one of the first minor-axis direction drive unit and the second minor-axis direction drive unit that is farther from the other short side to move the punch in the minor-axis direction to return the punch from an inclined state to a state parallel to the major-axis direction, and while trimming the uncut portion of the other long side along the trim line by cooperation with the die, From the state of the punch after the trimming, drive the major-axis direction drive unit to move the punch in the major-axis direction, and trim the uncut portion of one short side along the trim line by cooperation with the die which can be characterized by this.

[0015] Also, the trimming method of the rectangular container according to the present invention is A trimming device for a rectangular container that cuts a rectangular container having one end opened and a bottom at the other end and having a rectangular cross-sectional shape parallel to the bottom surface along a plane including a predetermined trim line, A die that is integrally supported with the trimming device main body, accommodates the outer periphery of the rectangular container, and is disposed along the trim line, and A punch that is accommodated in the rectangular container with a predetermined gap from the cross-sectional shape inside the rectangular container and is supported by the trimming device main body so as to be movable in a plane parallel to the bottom surface, A major-axis direction drive unit that moves the punch along the major-axis direction in the cross-sectional shape of the rectangular container, A first minor-axis direction drive unit that moves the punch along the minor-axis direction in the cross-sectional shape of the rectangular container, A second minor-axis direction drive unit that is arranged side by side along the major-axis direction with the first minor-axis direction drive unit and moves the punch along the minor-axis direction in the cross-sectional shape of the rectangular container, A trimming method of a rectangular container in a trimming device configured to include Drive the major-axis direction drive unit to move the punch in the major-axis direction, and trim one short side of the rectangular container along the trim line by cooperation with the die, From the state of the punch after the trimming is completed, the first short-axis drive unit and the second short-axis drive unit, one of which is closer to the one short side, are driven to move the punch in the short-axis direction and tilt the punch, and in cooperation with the die, the one short side of one long side of the rectangular container connected to the one short side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is furthest from the short side, are driven to move the punch in the short-axis direction, returning the punch from an inclined state to a state parallel to the long axis, while in cooperation with the die, the uncut portion of the long side is trimmed along the trim line. From the state of the punch after trimming is complete, the longitudinal axis drive unit is driven in the reverse direction to move the punch in the longitudinal axis direction, and in cooperation with the die, the other short side of the rectangular container is trimmed along the trim line. From the state in which the trimming is completed, the first short-axis drive unit and the second short-axis drive unit are driven to move the punch parallel to the other long side of the rectangular container, and in cooperation with the die, the uncut portion of the other short side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and one of the second short-axis drive units that is closer to the other short side are driven to move the punch in the short-axis direction and tilt the punch, and in cooperation with the die, the other short side of the other long side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is furthest from the other short side, are driven to move the punch in the short-axis direction, returning the punch from an inclined state to a state parallel to the long axis, while in cooperation with the die, the uncut portion of the other long side is trimmed along the trim line. From the state of the punch after trimming is complete, the long-axis drive unit is driven to move the punch in the long-axis direction, and in cooperation with the die, the uncut portion of the one short side is trimmed along the trim line. A method for trimming a rectangular container, When the aforementioned longitudinal axis drive unit is driven to move the punch in the longitudinal axis direction, and in cooperation with the die, trims one short side of the rectangular container along the trim line, the movement of the punch is used to form a weaker portion on the opening side of one short side of the rectangular container above the trim line, where the thickness is thinner than the other side. It is characterized by the following: [Effects of the Invention]

[0017] According to the present invention, a trimming device for rectangular containers is possible that has a relatively simple structure, does not require skilled personnel or advanced cam mechanisms, and can perform high-quality trimming while suppressing the generation of matching burrs, etc. and direction Law It can be provided. [Brief explanation of the drawing]

[0018] [Figure 1] (A) is a plan view of a deep-drawn product and a V-shaped mold according to one embodiment of the present invention (viewed from the top opening side along a direction perpendicular to the bottom surface of the deep-drawn product), (B) is a front view of the same deep-drawn product and V-shaped mold (viewed from a direction perpendicular to the long side wall), (C) is a front view showing the deep-drawn product separated into scrap and product by trimming, (D) is a right side view of (B), and (E) is a right side view of (C). [Figure 2] This is a front view of a trimming device for rectangular containers according to one embodiment of the present invention. [Figure 3] This is a right side view of Figure 2. [Figure 4] This is a plan view showing the punch holder, slide plate, and punch support structure of the trimming device described above. [Figure 5] This is a plan view showing the three drive units (long axis drive unit, first short axis drive unit, and second short axis drive unit) of the trimming device. [Figure 6](A) is a schematic plan view illustrating step 1 of the trimming process (punch movement on a drawn product) performed by a trimming device and method for a rectangular container according to one embodiment of the present invention, (B) is a schematic plan view illustrating step 2 of the same, and (C) is a schematic plan view illustrating step 3 of the same. [Figure 7] (A) is a schematic plan view illustrating step 4 of the trimming process (punch movement on the drawn product) performed by the trimming apparatus and method for the rectangular container described above, (B) is a schematic plan view illustrating step 5 described above, and (C) is a schematic plan view illustrating step 6 described above. [Figure 8] (A) is a schematic plan view illustrating step 7 of the trimming process (punch movement on the drawn product) performed by the trimming device and method for the rectangular container described above, (B) is a schematic plan view illustrating step 8 described above, and (C) is a schematic plan view illustrating step 9 described above. [Figure 9] (A) is a schematic plan view illustrating step 10 of the trimming process (punch movement on the drawn product) performed by the trimming apparatus and method for the rectangular container described above, and (B) is a schematic plan view illustrating step 11 described above. [Figure 10] (A) is a schematic plan view illustrating step 1 of the trimming process performed by the trimming apparatus and method for the rectangular container described above, with the drawn product and punch removed; (B) is a schematic plan view illustrating step 2 described above; and (C) is a schematic plan view illustrating step 3 described above. [Figure 11] (A) is a schematic plan view illustrating step 4 above, (B) is a schematic plan view illustrating step 5 above, and (C) is a schematic plan view illustrating step 6 above. [Figure 12] (A) is a schematic plan view illustrating step 7 above, (B) is a schematic plan view illustrating step 8 above, and (C) is a schematic plan view illustrating step 9 above. [Figure 13](A) is a schematic plan view illustrating step 10, and (B) is a schematic plan view illustrating step 11. [Figure 14] (A) is a timing chart showing the rotational angle position (drive state: punch position) of the electric motor of the long-axis drive unit in each step, (B) is a timing chart showing the rotational angle position (drive state: punch position) of the electric motor of the first short-axis drive unit in each step, and (C) is a timing chart showing the rotational angle position (drive state: punch position) of the electric motor of the second short-axis drive unit in each step. [Figure 15] This is a plan view showing another example of the configuration of the drive unit of the trimming device for rectangular containers according to the present invention. [Modes for carrying out the invention]

[0019] An embodiment of the present invention will be described below with reference to the accompanying drawings. However, the present invention is not limited to the embodiment described below.

[0020] The trimming device and method for rectangular containers (or rectangular tube containers) according to this embodiment allows for driving the trimming punch from three directions, enabling pushing and pulling of the punch from each direction. The control device allows for sequential and continuous cutting, enabling trimming without deformation of the product. Furthermore, since trimming is completed with a single punch, it is possible to suppress the occurrence of burrs and sagging simply by ensuring the appropriate punching clearance, without having to worry about matching burrs.

[0021] In this embodiment, as an example, as shown in Figures 1(A) to 1(E), we show a case where a rectangular container 100, which is a drawn-out product 100, is cut in cross-section near the upper edge on the open end side, with a cross-section parallel to the bottom surface 101 of the rectangular container 100 (a cross-section perpendicular to the drawing direction (the direction of movement of the slide of the press machine)). In other words, as shown in Figures 1(B) to 1(E), in the trimming apparatus and method for a rectangular container according to this embodiment, a deep-drawn product 100 produced (formed) by deep-drawing is trimmed along the trim line 100A to separate the scrap 100C and produce a product (deep-drawn product) 100B. Reference numerals 102A and 102B indicate side walls on the short side, and reference numerals 103A and 103B indicate side walls on the long side.

[0022] An example of the rectangular container 100 according to this embodiment is a hollow container with an open top obtained by drawing an aluminum alloy with a plate thickness of about 1 mm, for example, a hollow container with short sides 102A and 102B of several tens to several hundred mm (for example, about 40 mm), long sides 103A and 103B of several tens to several hundred mm (for example, about 300 mm), and a depth of several tens to several hundred mm (for example, about 60 to 100 mm), with a bottom surface 101 and each side wall (short sides 102A and 102B, long sides 103A and 103B) having a thickness of about 0.5 to 1.2 mm. However, the present invention is not limited to these dimensions. The rectangular container 100 according to this embodiment corresponds to an example of the "rectangular container having an open end and a bottom at the other end, and having a rectangular cross-sectional shape parallel to the bottom surface" according to the present invention.

[0023] Figure 2 shows a front view of the trimming device 1 according to this embodiment. Figure 3 shows its right side view. As shown in Figures 2 and 3, in the trimming device 1, the deep-drawn product 100, which is a rectangular container, is held so that its outer surface contacts the inner surface of the die 10. The die 10 is integrally supported by a base portion 110 which is integrally supported by the device frame 2. In addition, a V-shaped projection mold 11 is provided on top of the die 10, which recesses the upper edge of the deep-drawn product 100 above the trim line 100A (the portion that will become scrap 100C) into a V-shaped groove extending almost vertically (vertically) down to the trim line 100A (see Figures 1(A), 1(B), and 2).

[0024] A punch 20, which works in cooperation with a die 10 to perform trimming on a deep-drawn product 100, is supported by a punch holder 30, which is supported by a shaft 41 that is connected to a cylinder 40, an example of a linear actuator, and moves in the vertical direction. The cylinder 40 is integrally supported by the apparatus frame 2.

[0025] The punch holder 30 is lowered by the cylinder 40 from the initial position A to the trimming position B in Figures 2 and 3. The punch 20, which is integrated with the punch holder, is inserted into the inside of the deep-drawn product 100 housed inside the die 10 and brought to the trimming position. The outer circumference of the punch 20 is configured to have a predetermined gap (clearance) around its entire circumference with respect to the inner wall of the deep-drawn product 100. Reference numeral 110A denotes a positioning pin that positions the punch holder 30 and thus the punch 20, and the base portion 110 and thus the die 10 in the height and horizontal directions. Multiple positioning pins 110A may be provided.

[0026] Furthermore, a pressing plate 120 can be provided, which is inserted inside the deep-drawn product 100 housed inside the die 10, and presses the bottom surface 101 of the deep-drawn product 100 against the support base 131 with a predetermined pressing force from elastic biasing elements 121 and 122 to suppress deformation during the trimming process. The pressing plate 120 is supported by the punch holder 30 via the elastic biasing elements 121 and 122, and moves up and down in accordance with the vertical movement of the shaft 41 by the cylinder 40 within the range of the initial position A and the trimming work position B, during loading and unloading of the deep-drawn product 100. The support base 131 is connected to a cylinder mechanism 130, which is a linear motion mechanism, and moves up and down within the range of the arrow labeled C in Figure 2 when loading or unloading the drawn product 100.

[0027] The punch holder 30 supports the slide plate 31 so that it can slide (move) in a horizontal plane (a plane perpendicular to the planes in Figures 2 and 3 and aligned in the left-right direction: the plane in Figure 4), and the punch 20 is fixedly supported (attached) to the slide plate 31. Therefore, the punch 20 is configured to be movable in the horizontal plane relative to the die 10 and the drawn product 100, which are integrally supported with respect to the trimming device 1.

[0028] In this embodiment, as shown in Figure 4, the slide plate 31 is supported so as to be movable in the horizontal plane relative to the punch holder 30 via a long-axis slider 51 that allows movement of the punch 20 only in the long-axis direction, a first short-axis slider 52 that allows movement of the punch 20 only in the short-axis direction, and a second short-axis slider 53 that is arranged at a predetermined distance from the short-axis slider 52 in the long-axis direction of the punch 20 and also allows movement of the punch 20 only in the short-axis direction. In this embodiment, the term "long axis direction" refers to the long axis direction of the punch 20 or the drawn product 100 in the plane of Figure 4 (left-right direction in Figure 4), the term "short axis direction" refers to the short axis direction of the punch 20 or the drawn product 100 in the plane of Figure 4 (up-down direction in Figure 4), and the term "vertical axis" refers to the drawing direction (axis perpendicular to the plane of Figure 4).

[0029] The basic configuration of the long-axis slider 51, the first short-axis slider 52, and the second short-axis slider 53 is the same, but their installation locations differ. The longitudinal axis slider 51 according to this embodiment is disposed at the left end of the slide plate 31 in Figure 4 and comprises a slide element 51A that is movable only in the longitudinal axis direction and a guide 51B that engages with the slide element 51A and supports the slide element 51A while guiding it so that it is movable only in the longitudinal axis direction.

[0030] A slider 51C is supported on the proximal side of the punch 20 of the slide element 51A so as to be movable only in the direction of the short axis relative to the slide element 51A. A shaft 51D connected to the slide plate 31 is supported on this slider 51C so as to be rotatable around a vertical axis. Accordingly, the slide plate 31 and the shaft 51D, which is integrated with the punch 20 supported thereon, are connected (supported) to the slide element 51A via the slider 51C so as to be rotatable about its axial center and movable in the short axis direction.

[0031] Furthermore, a slider 51E is supported on the distal side of the punch 20 of the slide element 51A so as to be movable only in the short axis direction relative to the slide element 51A. An eccentric shaft 51F is supported on this slider 51E so as to be rotatable around a vertical axis, and is connected to the output rotation shaft of the long axis drive unit 61 with a predetermined eccentricity E1. Therefore, the eccentric shaft 51F, which is rotatably connected to the output rotating shaft 61A of the long-axis drive unit 61, is connected (supported) to the sliding element 51A via the slider 51E so as to be rotatable around its axis and movable in the short-axis direction.

[0032] Therefore, when the longitudinal axis drive unit 61 is driven to rotate the output rotation shaft 61A in a predetermined direction, the eccentric shaft 51F rotates eccentrically, causing the slider 51E to move in the longitudinal axis direction. The slide element 51A is then moved in the longitudinal axis direction via the slider 51E, and consequently the slide plate 31 is moved in the longitudinal axis direction via the shaft 51D so that it can rotate around the shaft 51D.

[0033] The first short-axis slider 52 according to this embodiment is located at the lower end of the slide plate 31 in Figure 4, relatively close to the long-axis slider 51, and comprises a slide element 52A that is movable only in the short-axis direction, and a guide 52B that engages with the slide element 52A and supports the slide element 52A while guiding it so that it is movable only in the short-axis direction.

[0034] A slider 52C is supported on the proximal side of the punch 20 of the slide element 52A so as to be movable only in the longitudinal direction relative to the slide element 52A. A shaft 52D connected to the slide plate 31 is supported on this slider 52C so as to be rotatable around a vertical axis. Therefore, the slide plate 31 and the shaft 52D, which is integrated with the punch 20 supported thereon, are connected (supported) to the slide element 52A via the slider 52C so as to be rotatable about its axial center and movable in the longitudinal direction.

[0035] Furthermore, a slider 52E is supported on the distal side of the punch 20 of the slide element 52A so as to be movable only in the short axis direction relative to the slide element 51A. An eccentric shaft 52F is supported on this slider 51E so as to be rotatable around a vertical axis, and is connected to the output rotation shaft of the first short axis drive unit 62 with a predetermined eccentricity E2. Therefore, the eccentric shaft 52F, which is rotatably connected to the output rotating shaft 62A of the first short-axis drive unit 62, is connected (supported) to the sliding element 52A via the slider 52E so as to be rotatable around its axis and movable in the short-axis direction.

[0036] Therefore, when the first short-axis drive unit 62 is driven to rotate the output rotating shaft 62A in a predetermined direction, the eccentric shaft 52F rotates eccentrically, causing the slider 52E to move in the short-axis direction. The slide element 52A is then moved in the short-axis direction via the slider 52E, and consequently the slide plate 31 is moved in the short-axis direction via the shaft 52D so that it can rotate around the shaft 52D.

[0037] The second short-axis slider 53 according to this embodiment differs from the first short-axis slider 52 in that its mounting position is at the lower end of the slide plate 31 in Figure 4, relatively far from the long-axis slider 51, and that it is connected to the output rotating shaft 63A of the second short-axis drive unit 63 by the eccentric shaft 53F with a predetermined eccentricity E3. However, the other configurations are the same, so a detailed explanation is omitted here.

[0038] Therefore, when the second short-axis drive unit 63 is driven to rotate the output rotation shaft 63A in a predetermined direction, the eccentric shaft 53F rotates eccentrically, causing the slider 53E to move in the short-axis direction. The slide element 53A is then moved in the short-axis direction via the slider 53E, and consequently the slide plate 31 is moved in the short-axis direction via the shaft 53D so that it can rotate around the shaft 53D.

[0039] In other words, the trimming device 1 according to this embodiment supports the slide plate 31 and consequently the punch 20 so as to be movable relative to the device body in a plane perpendicular to the depth direction of the drawn product 100 (for example, in a horizontal plane), and is configured to trim the upper edge of the drawn product 100 by moving the slide plate 31 and consequently the punch 20 in the said plane using three drive units (for example, a long axis drive unit 61, a first short axis drive unit 62, and a second short axis drive unit 63).

[0040] The predetermined eccentricity amounts E1, E2, and E3 can all be the same value, at least one of them can be a different value, or all of them can be different values, depending on the specifications of the drawn product 100 and other requirements. Furthermore, the longitudinal axis drive unit 61, the first short axis drive unit 62, and the second short axis drive unit 63 can be electric motors such as servo motors. They can also be hydraulic motors. The drive control of the longitudinal axis drive unit 61, the first short axis drive unit 62, and the second short axis drive unit 63 is performed independently by the control device 70 provided in the trimming device 1 (see Figure 5).

[0041] In the present embodiment, using the trimming device 1 configured as described above, a trimming process is performed on the drawn molded product 100 according to the following STEP (also referred to as steps). Note that the rotational angle positions (drive state: position of the punch 20) of the electric motors of the long-axis direction drive unit 61, the first short-axis direction drive unit 62, and the second short-axis direction drive unit 63 in each of the following STEPs (steps) are shown in the timing chart of FIG. 14. The numbers on the horizontal axis of FIG. 14 correspond to the numbers (numbers) of each of the following STEPs (steps).

[0042] In FIG. 14, the rotational angle position of the long-axis direction drive unit 61 corresponds to the rotational angle position of the eccentric shaft 51D. The position of the rotational angle of 90° (270°) corresponds to the neutral position of the punch 20 in the direction along the long axis of the drawn molded product 100. The position of the rotational angle of 180° corresponds to the right end position in FIG. 6, etc. in the direction along the long axis of the drawn molded product 100 by the punch 20. The position of the rotational angle of 360° (0°) corresponds to the left end position in FIG. 6, etc. in the direction along the long axis of the drawn molded product 100 by the punch 20.

[0043] Also, the rotational angle positions of the first short-axis direction drive unit 62 and the second short-axis direction drive unit 63 correspond to the rotational angle positions of the eccentric shafts 52D and 53D. The position of the rotational angle of 90° (270°) corresponds to the neutral position of the punch 20 in the direction along the short axis of the drawn molded product 100. The position of the rotational angle of 180° corresponds to the upper end position in FIG. 6, etc. in the direction along the short axis of the drawn molded product 100 by the punch 20. The position of the rotational angle of 360° (0°) corresponds to the lower end position in FIG. 6, etc. in the direction along the short axis of the drawn molded product 100 by the punch 20.

[0044] <STEP1 (FIGS. 6(A), FIGS. 10(A))> First, with the long-axis direction drive unit 61, the first short-axis direction drive unit 62, and the second short-axis direction drive unit 63 in the initial state, they are set to the initial position (neutral position) (in the initial position A, a state where there is a predetermined gap between the outer periphery of the punch 20 and the inner wall of the drawn molded product 100).

[0045] <STEP2 (Figure 6(B), Figure 10(B))> (Trimming of the right short side) From the state of Step 1, drive the long-axis direction drive unit 61 to move the slide plate 31 and thus the punch 20 toward the right in Figure 6(B) and Figure 10(B) in the long-axis direction, and use the punch 20 to trim (cut) the right short side 102A portion of the drawn molded product 100 along the trimming line 100A (or make a cut). However, since the punch 20 inserted inside the drawn molded product 100 is moved from a direction substantially perpendicular to the short side 102A for trimming, trimming is not performed for the thickness of the upper and lower long sides 103A, 103B connected to the short side 102A in the figure. Note that the first short-axis direction drive unit 62 and the second short-axis direction drive unit 63 maintain the state of Step 1 (see Figure 14).

[0046] Also, during the progress of the trimming process (punch 20), by using the movement of the punch 20, a part on the outer peripheral side of the short side 102A of the drawn molded product 100 that becomes the scrap 100C above the trimming line 100A is recessed into a vertical groove shape by the V-projection mold 11 installed on the die 10 (it is also possible to create the recess before trimming), and a thin-walled part (weak part) 100D with a lower tensile strength than the other side wall parts (the parts that become the scrap 100C) is formed. Thereby, during the trimming progress, the thin-walled part is actively deformed (broken), and by eliminating the unreasonable deformation generated during trimming in the part that becomes the scrap 100C, it is possible to suppress the possibility that the part that becomes the scrap 100C affects the product 100B side during the trimming process, so that the deformation of the drawn molded product 100 during the trimming process can be suppressed. Here, the V-projection die 11 corresponds to an example of the weak portion forming part according to the present invention. The weak portion forming part is not limited to this, and any part that forms a portion with a lower tensile strength than other side wall portions (the portion that becomes the scrap 100C) may be used, and the configuration, shape, thickness, size, etc. are not particularly limited. Note that it is desirable that the punch 20 and the V-projection die 11 are not in direct contact in order to suppress wear, damage, etc.

[0047] <STEP3(FIG. 6(C), FIG. 10(C))> (Upper long side right trimming) In step 3, from the position or state of the punch 20 at which the trimming in step 2 has ended, the second short axis direction drive unit 63 is driven to move the right side of the punch 20 in the drawing upward (toward the upper long side 103A side in the drawing of the drawn molded product 100), and the punch 20 trims the uncut portion above the short side 102A on the right side and the right side portion of the long side 103A of the drawn molded product 100 along the trimming line 100A. Note that the long axis direction drive unit 61 and the first short axis direction drive unit 62 maintain the state of step 2 (see FIG. 14). By only moving the second short axis direction drive unit 63, the punch 20 is rotated around the shaft 51D and tilted with respect to the long side 103A of the drawn molded product 100 for trimming, so that the cutting load can be significantly reduced. Further, since a thin-walled portion (weak portion) 100D with low strength is previously formed on the scrap 100C side, the scrap 100C side is deformed (broken), and the influence on the drawn molded product 100 (product 100B) side due to the deformation of the scrap 100C side during trimming is suppressed, and the subsequent trimming process can proceed without deformation of the drawn molded product 100 (product 100B) itself.

[0048] <STEP4(FIG. 7(A), FIG. 11(A))> (Upper long side left trimming) In step 4, from the position or state of the punch 20 where the trimming in step 3 has ended, the first minor-axis direction drive unit 62 is driven to move the left side of the punch 20 in the drawing upward (toward the long side 102A side on the upper side in the drawing of the drawn product 100) in the drawing, and the punch 20 trims the uncut portion (left side portion) of the long side 102A on the upper side in the drawing of the drawn product 100 along the trimming line 100A. Note that the major-axis direction drive unit 61 and the second minor-axis direction drive unit 63 maintain the state in step 3 (see FIG. 14). By only moving the first minor-axis direction drive unit 62, the punch 20 is rotated around the shaft 53D, and while returning from the state inclined with respect to the long side 103A of the drawn product 100 to the state parallel to the major-axis direction (long side 103A), the uncut portion (left side portion) of the long side 103A on the upper side in the drawing is trimmed, so that the cutting load can be suppressed to a small value.

[0049] <STEP5 (FIG. 7(B), FIG. 11(B))> (Trimming of the upper side of the left short side) In step 5, from the position or state of the punch 20 where the trimming in step 4 has ended, the major-axis direction drive unit 61 is driven so that the punch 20 moves toward the opposite side (left side in the drawing) from the case of step 2, and the other short side 102B (the left short side in the drawing) is trimmed along the trimming line 100A. However, since the punch 20 inserted inside the drawn product 100 is moved and trimmed from a direction substantially perpendicular to the short side 102B, the vicinity of the connection portion of the short side 102B with the long side 103B on the lower side in the drawing is not trimmed by the thickness of the long side 103B on the lower side and the thickness of the long side 102A on the upper side. Note that the first minor-axis direction drive unit 62 and the second minor-axis direction drive unit 63 maintain the state in step 4 (see FIG. 14).

[0050] Also, at this time, similar to Step 2, by utilizing the movement of the punch 20, a part on the outer peripheral side of the left short side 102B of the drawn molded product 100 that becomes the scrap 100C above the trimming line 100A is recessed into a vertical groove shape (it is also possible to create the recess before trimming), and it can also be configured to form a thin-walled part (weak part) 100D with a lower tensile strength than the other side wall parts (the parts that become the scrap 100C). In that case, as the trimming following that step progresses, the thin-walled part of the scrap 100C breaks, and the scrap 100C can be split into two parts. Therefore, in addition to being able to further suppress the deformation of the drawn molded product 100 (product 100B), the fact that the scrap 100C can be split into two parts makes its handling easier, and the work related to scrap processing (removing from the device, carrying out, etc.) can be made easy and smooth, contributing to an improvement in production efficiency.

[0051] <STEP6 (FIG. 7(C), FIG. 11(C))> (Trimming of the lower side of the left short side) In Step 6, from the position or state of the punch 20 where the trimming in Step 5 has ended, the first short-axis direction drive unit 62 and the second short-axis direction drive unit 63 are driven to move the punch 20 parallelly downward in the figure, and the punch 20 is moved to the neutral position (long-side neutral position) in the vertical direction to trim the uncut part of the left short side 102B of the drawn molded product 100 in the figure. However, since the punch 20 inserted inside the drawn molded product 100 is moved and trimmed from a direction substantially perpendicular to the short side, trimming for the thickness of the lower long side 103B connected to the short side in the figure is not performed. The long-axis direction drive unit 61 maintains the state of Step 5 (see FIG. 14).

[0052] <STEP7 (FIG. 8(A), FIG. 12(A))> (Left trimming of the lower long side) In step 7, from the position or state of the punch 20 after the trimming in step 6, the first minor-axis direction driving unit 62 is driven to move the left side of the punch 20 in the drawing downward (toward the long side 103B on the lower side in the drawing of the drawn product 100) in the drawing, and the punch 20 trims the uncut portion on the lower side of the left short side 102B and the left portion of the lower long side 103B of the drawn product 100 along the trimming line 100A. Note that the major-axis direction driving unit 61 and the second minor-axis direction driving unit 63 maintain the state in step 6 (see FIG. 14). In this step as well, similar to step 4, only the first minor-axis direction driving unit 62 is moved to tilt the punch 20 for trimming, so that the cutting load can be suppressed to a small level.

[0053] <STEP8(FIG. 8(B), FIG. 12(B))>(Right trim of the lower long side) In step 8, from the position or state of the punch 20 after the trimming in step 7, the second minor-axis direction driving unit 63 is driven to move the right side of the slide plate 31 and thus the right side of the punch 20 in the drawing downward (toward the long side 103B on the lower side in the drawing of the drawn product 100) in the drawing, and the punch 20 trims the uncut portion (right side portion) of the lower long side 103B of the drawn product 100 along the trimming line 100A. Note that the major-axis direction driving unit 61 and the first minor-axis direction driving unit 62 maintain the state in step 7 (see FIG. 14). In this step as well, similar to step 3, only the second minor-axis direction driving unit 63 is moved to return the punch 20 from the tilted state to a state parallel to the major-axis direction (long side 103B) while trimming, so that the cutting load can be suppressed to a small level.

[0054] <STEP9(FIG. 8(C), FIG. 12(C))>(Lower trim of the right short side) In step 9, from the position or state of the punch 20 where the trimming in step 8 has ended, the long-axis direction drive unit 61 is driven so that the punch 20 moves toward the right side in the figure, and the lower part of the short side 102A on the right side in the figure (the uncut part in step 2) is trimmed along the trimming line 100A. Note that the first short-axis direction drive unit 62 and the second short-axis direction drive unit 63 maintain the state in step 8 (see Fig. 14). As a result, the process of trimming the upper edge portion of the drawn molded product 100 along the trimming line 100A for one round is completed, and the drawn molded product 100 has the scrap 100C separated, and the product 100B is produced.

[0055] <STEP10 (Fig. 9(A), Fig. 13(A))> In step 10, from the position or state of the punch 20 where the trimming in step 9 has ended, the first short-axis direction drive unit 62 and the second short-axis direction drive unit 63 are driven to move the slide plate 31 and thus the punch 20 upward in the figure, and the punch 20 is moved to the neutral position (long-side neutral position) in the vertical direction. Note that the long-axis direction drive unit 61 maintains the state in step 9 (see Fig. 14).

[0056] <STEP11 (Fig. 9(B), Fig. 13(B))> In step 11, from the position or state of the punch 20 where step 10 has ended, the long-axis direction drive unit 61 is driven to move the punch 20 toward the left side in the figure, and the punch 20 is moved to the neutral position (short-side neutral position) in the left-right direction for the next trimming process and returned to the initial position (neutral position) to end the current trimming process. Note that the first short-axis direction drive unit 62 and the second short-axis direction drive unit maintain the state in step 10 (see Fig. 14).

[0057] As described above, this embodiment is equipped with three drive units (long axis drive unit 61, first short axis drive unit 62, and second short axis drive unit 63). The long axis drive unit 61 first trims the short side 102A of the drawn product 100, which has a relatively small cutting load, using the punch 20. The second short axis drive unit 63 moves the punch 20 so that the trimmed portion is continuous, and while tilting the punch 20, trimming of the long side 103A of the drawn product 100 is started from the short side 102A towards the opposite short side 102B. When the trimming has progressed to a predetermined point, the first short axis drive unit 62 moves the punch 20 back to a state parallel to the long axis (long side 103A) from the tilted state, and the trimming of the long side 103A is advanced to the opposite short side 102B, completing the trimming of one long side 103A.

[0058] Subsequently, the punch 20 is driven by the long axis drive unit 61 to trim the opposite short side 102B of the drawn product 100 so that the trimmed portion is continuous. The uncut portion of the short side 102B is then trimmed by simultaneously driving the first short axis drive unit 62 and the second short axis drive unit 63 to move the punch 20 parallel toward the long side 103B. Then, to ensure that the trimming section is continuous, the punch 20 is moved by the first short-axis drive unit 62, and while tilting the punch 20, the other long side 103B of the drawn product 100 is trimmed from the nearby short side 102B towards the opposite short side 102A. When the trimming has progressed to a predetermined point, the punch 20 is moved by the second short-axis drive unit 63, returning the punch 20 from the tilted state to a state parallel to the long axis (long side 103B), and the trimming of the long side 103B is advanced to the opposite short side 102A, completing the trimming of the other long side 103B. Furthermore, to ensure that the trimmed portion is continuous, the punch 20 is driven by the long axis drive unit 61 to trim the uncut portion (remaining portion) on the opposite short side of the drawn product 100, and the upper edge of the drawn product 100 is trimmed along the trim line A all the way around, thereby separating the scrap 100C and producing product 100B, thus completing the trimming process for one drawn product 100.

[0059] Therefore, according to this embodiment, the trimming punch 20 is moved via three drive units without being withdrawn from the trimming section so that the trimming section remains continuous, thereby contributing to the realization of high-quality trimming that is less prone to the occurrence of matching burrs and the like.

[0060] Furthermore, according to this embodiment, since the shorter side of the drawn product 100, which has a relatively small cutting load, is trimmed first using the punch 20, the capacity of the short-side drive unit (long-axis drive unit 61) can be reduced compared to when trimming is done from the long side. This contributes to miniaturization and weight reduction of the device, and consequently to cost reduction and improved flexibility in installation layout. Furthermore, when trimming the shorter side first using the punch 20, the cutting load can be kept lower compared to trimming from the longer side, thereby suppressing deformation of the drawn product 100 and contributing to the production of high-quality products.

[0061] Furthermore, according to this embodiment, by sequentially moving either the first short-axis drive unit 62 or the second short-axis drive unit 63, the punch 20 is tilted with respect to the long side of the drawn product 100, thereby trimming the long side of the drawn product 100, and thus the cutting load can be kept to a minimum. Therefore, the capacity of the first short-axis drive unit 62 and the second short-axis drive unit 63 can be reduced, which can contribute to miniaturization and weight reduction of the device, and consequently to cost reduction and increased flexibility in installation layout. Furthermore, by tilting the punch 20 relative to the long side of the drawn product 100 and trimming the long side of the drawn product 100, the cutting load can be kept low, thereby suppressing deformation of the drawn product 100 and contributing to the production of high-quality products.

[0062] Furthermore, the trimming device 1 according to this embodiment is configured to move the punch with a drive source such as a motor independent of the press machine's slide. Compared to advanced and complex trimming devices that utilize, for example, a so-called wobbling cam or a complex gear mechanism and link mechanism as described in Patent Document 1, this configuration simplifies the structure and eliminates the need for a high level of skill or experience.

[0063] Furthermore, since the trimming device 1 according to this embodiment uses a motor or the like as a drive source independent of the movement of the press machine's slide, it is not limited by the movement of the press machine's slide. Therefore, the punch stroke amount, trimming timing, and operation can be set with a high degree of freedom, contributing to the provision of a user-friendly device. In particular, even for shapes that are difficult to trim with so-called wobbling cam trimming devices, namely, shapes that require a long stroke length of the press machine's slide (for example, a rectangular cross-section with a relatively large aspect ratio), or for trimming multiple types of deep-drawn products with different shapes and specifications, the trimming device 1 according to this embodiment can be easily applied.

[0064] Furthermore, the trimming device 1 according to this embodiment does not require a complex gear mechanism and link mechanism to convert rotational motion such as that of an electric motor into circumferential motion of a punch, as is the case with the device in Patent Document 1. Instead, it has a configuration that controls the drive of three mutually independent drive units (long axis drive unit 61, first short axis drive unit 62, and second short axis drive unit 63), so it can easily and quickly respond to changes in plate thickness or the shape of rectangular containers. Consequently, time-consuming and troublesome work can be eliminated, and the downtime of the production line can be reduced, thus avoiding a decrease in production efficiency. Furthermore, the trimming device 1 according to this embodiment does not require a complex and highly precise inclined punch for making an oblique cut at the start of trimming, as is the case with the device in Reference Document 1. Therefore, it can contribute to reducing the running costs of the equipment and, consequently, the manufacturing costs.

[0065] Furthermore, according to this embodiment, unlike a device that trims from two orthogonal directions, such as the one described in Patent Document 2, the trimming process is not divided into two steps, and trimming can be performed with a series of punch movements (trimming is completed with one punch). As a result, the occurrence of matching burrs can be suppressed, and the occurrence of burrs can be suppressed simply by ensuring an appropriate punching clearance.

[0066] Furthermore, in this embodiment, a punch with a relatively easy-to-manufacture rectangular cross-sectional shape (a cross-sectional shape with two parallel long sides and parallel short sides perpendicular to them) can be used to trim the material by giving an appropriate inclination angle (shear angle) to the long sides. Therefore, compared to cases where the shear angle is applied to the punch shape itself (punches with a parallelogram cross-sectional shape, which are highly complex and costly to manufacture), the manufacturing cost of the punch can be kept low.

[0067] In other words, according to the present invention, a trimming device for rectangular containers is possible that has a relatively simple structure, does not require skilled personnel or advanced cam mechanisms, and can perform high-quality trimming while suppressing the generation of matching burrs, etc. and direction Law It can be provided.

[0068] Furthermore, the effect of providing a recess (weak point) 100D in the vertical direction of the short side of the portion that becomes scrap 100C is that the cut scrap 100C becomes more prone to breaking or deforming during the trimming process. Therefore, the risk of deformation of scrap 100C during the trimming process affecting product 100B is suppressed, thus suppressing deformation of product 100B and contributing to the production of high-quality products. Furthermore, if the recessed portion (weak part) 100D is provided not only on one short side but also on the other short side, the scrap 100C can be divided into two, making it easier to discharge the scrap outside the trimming device 1. In addition, since the scrap can be bundled into smaller pieces, transportation costs can also be reduced. Furthermore, it is also possible to provide a recess (weak part) 100D on at least one of the longer sides, similar to the shorter side. In this case, the scrap can be divided into two or more parts, or even three or more parts, which further contributes to improving the ease of handling the scrap and suppressing deformation of the product 100B. Furthermore, since the recess (weak part) 100D is formed by utilizing the movement of the punch 20 when trimming the short side, the number of steps is not increased, and a separate drive source dynamic mechanism for forming the recess (weak part) 100D is not required. Therefore, it is possible to contribute to providing a trimming device and method that makes scrap handling easy and minimizes product deformation while maintaining a simplified configuration and low cost.

[0069] Furthermore, in this embodiment, the punch is moved in a predetermined plane (in this embodiment, the horizontal plane) by three drive units. Therefore, it is not necessary to require a complex and advanced drive mechanism such as a wobbling cam, gear mechanism, or link mechanism, nor is it necessary to have a complex and highly precise punch shape. Even a simple punch shape can be given an inclination angle (shear angle). As a result, the cutting load can be kept low, which contributes to suppressing deformation of the deep-drawn product. In addition, it is possible to reduce the manufacturing cost of the punch cutter, and since the inclination angle (shear angle) can be changed as appropriate, it is possible to provide equipment that can handle a wide variety of deep-drawn products.

[0070] Furthermore, in this embodiment, a position-controllable device such as a servo motor can be used as the drive source for the drive unit. In such cases, it is possible to accurately change the punch stroke and stroke timing to any desired setting according to the shape and thickness of the deep-drawn product without requiring any mechanical structural changes to the device. This contributes to providing a user-friendly trimming device that can perform trimming on a wide variety of deep-drawn products.

[0071] In this embodiment, the case where the entire stroke length (eccentricity) of each eccentric shaft 51D, 52D, and 53D is used during trimming (360° rotation) was described as an example. However, the present invention is not limited to this, and a drive source that can freely and accurately control the rotation angle (rotation position), such as a servo motor, can be used. In such cases, by reversing each eccentric shaft 51D, 52D, and 53D midway through its rotation instead of completing a full rotation, the stroke length of the punch 20 in the long axis direction and the short axis direction can be set with a high degree of freedom to match the product specifications.

[0072] Furthermore, while the timing chart in Figure 14 shows that each of the three corresponding axial drive units operates at each step, the operation of each axis can be arbitrarily overlapped so that the next step begins before the previous step is completed. For example, in step 2, the first short-axis drive unit 62 can be set to start the operation of step 3 when the rotation angle of the second short-axis drive unit 63 reaches 170°. On the other hand, if a V-shaped projection die 11 is provided as a weak point forming unit, it is desirable to reliably form the weakest point when step 1 is completed and to avoid direct contact between the punch 20 and the V-shaped projection die 11, so step 2 can be set not to overlap with step 1. In this way, it is possible to specify the steps to overlap and appropriately set the amount of overlap (rotation angle) of the next step relative to the previous step. By overlapping, the punch cutter does not necessarily stop at each step, allowing for smoother trimming and a reduction in cycle time.

[0073] Although this embodiment has been described using the trimming process of a rectangular deep-drawn product with a relatively large aspect ratio as an example, the present invention is not limited to this, and can also be applied when the difference (ratio) between the lengths of the short side and the long side is small, or when the lengths of each side are the same.

[0074] Furthermore, in this embodiment, the arrangement of the longitudinal axis drive unit 61, the first short axis drive unit 62, and the second short axis drive unit 63 was described as an example for the sake of explanation, as shown in Figure 5. However, the present invention is not limited to this arrangement, and the longitudinal axis drive unit 61 may be placed on the right side of Figure 5, the arrangement of the first short axis drive unit 62 and the second short axis drive unit 63 may be swapped left and right, or the arrangement of the first short axis drive unit 62 and the second short axis drive unit 63 may be swapped up and down. In other words, the arrangement of the longitudinal axis drive unit, the first short axis drive unit, and the second short axis drive unit according to the present invention is not limited to the arrangement example of the longitudinal axis drive unit 61, the first short axis drive unit 62, and the second short axis drive unit 63 according to this embodiment.

[0075] By the way, in this embodiment, electric motors were used as examples of drive sources for the long-axis drive unit 61, the first short-axis drive unit 62, and the second short-axis drive unit 63. However, the present invention is not limited to these, and other drive sources, such as linear motors or linear motion mechanisms such as actuators using fluid pressure such as water pressure, hydraulic pressure, or pneumatic pressure, can also be used. When using such a linear motion mechanism, the punch and the drive source are connected via a rotatable joint, such as a ball joint.

[0076] Furthermore, in this embodiment, the punch 20 was described as being brought close to the V-shaped projection mold 11 which is integrated with the die 10 to create a thin-walled portion (weak portion) 100D which has weaker tensile strength than the other side wall portions (the portion which becomes scrap 100C). However, the present invention is not limited to this, and the present invention can also be applied when a thin-walled portion (weak portion) 100D is not formed, and the V-shaped projection mold 11 can also be moved by a drive source to form a thin-walled portion (weak portion) 100D.

[0077] Furthermore, in this embodiment, an example of a configuration in which the upper edge of a drawn-drawn product 100 is trimmed by moving the punch 20 in a plane parallel to the bottom surface 101 of the drawn-drawn product 100 (for example, in a horizontal plane) using three push-pull (movable forward and backward) drive units (for example, a drive unit 61 in the long axis direction, a drive unit 62 in the first short axis direction, and a drive unit 63 in the second short axis direction), has been described, but the present invention is not limited thereto. As shown in the trimming device 1' in Figure 15, the slide plate 31 that fixedly supports the punch 20 can also be supported by six drive units so as to be movable in a plane perpendicular to the depth direction of the drawn-drawn product 100 (for example, in a horizontal plane). Here, the tip portions of the six drive units abut against the plate 31 so as to be able to separate from each other. Since there is no mechanical connection, the driving force acts only in the pushing direction. The six drive units can also be configured such that two drive units (reference numerals 161A and 161B) that move forward and backward along the long axis are arranged facing each other, two drive units (reference numerals 162A and 162B) that move forward and backward along the short axis are arranged facing each other, and two drive units (reference numerals 163A and 163B) that move forward and backward along the short axis are arranged parallel to these and facing each other. In such a case, as shown in Figure 15, the drive directions are arranged to be opposite to each other between the drive units that are arranged facing each other, and one drive unit can be configured to perform a pushing operation (forward operation) and the other drive unit can perform a pulling operation (reverse operation).

[0078] Furthermore, although this embodiment describes an example where the trimming process is performed with the opening side of the drawn product 100 facing upwards, the present invention is not limited to this, and it is also possible to perform the trimming process with the bottom (bottom surface) side of the drawn product 100 facing upwards.

[0079] Furthermore, although this embodiment describes an apparatus for trimming a deep-drawn product 100 by supporting it vertically in the direction of the drawing depth, the present invention is not limited to this. For example, the apparatus can be configured to trim the deep-drawn product 100 by supporting it horizontally or obliquely to the horizontal direction in the direction of the drawing depth. In this case, the drive source for the drive unit can be an actuator using fluid pressure such as water pressure, hydraulic pressure, or pneumatic pressure, or a linear motor.

[0080] The embodiments described above are merely illustrative examples for illustrating the present invention, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0081] 1. Trimming device 10 dice 11 V-shaped mold 20 punches 30 Punch Holder 31 Slide Plate 51 Long axis slider 52 First short-axis slider 53. Second short-axis slider 51A, 52A, 53A Slide elements 51C, 52C, 53C Slider 51D, 52D, 53D shafts 51E, 52E, 53E Sliders 51F, 52F, 53F Eccentric Shaft 61 Long axis drive unit 62 First short-axis drive unit 63 Second short-axis drive unit 70 Control device 100 square container (drawn-pressed product) 100A Trim Line 100B Product (Deep-drawn product) 100C Scrap 101 Base 102A Short side (right side) 102B Short side (left side) 103A Long side (top) 103B Long side (bottom side)

Claims

1. A trimming device for a rectangular container, having an open end and a bottom at the other end, and a rectangular cross-sectional shape parallel to the bottom surface, cuts the rectangular container along a plane that includes a predetermined trim line parallel to the bottom surface, A die is integrally supported with respect to the trimming device body, accommodates the outer circumference of the rectangular container, and is arranged along the trim line. A punch housed inside a rectangular container with a predetermined gap between the inner cross-sectional shape of the rectangular container and the punch being supported by the trimming device body so as to be movable in a plane parallel to the bottom surface, The punch is moved along the longitudinal axis in the cross-sectional shape of the rectangular container by a longitudinal axis drive unit, A first short-axis drive unit moves the punch along the short axis direction in the cross-sectional shape of the rectangular container, A second short-axis drive unit is arranged alongside the first short-axis drive unit along the long axis and moves the punch along the short axis in the cross-sectional shape of the rectangular container, A trimming device for a rectangular container comprising, The aforementioned longitudinal axis drive unit is driven to move the punch in the longitudinal axis direction, and in cooperation with the die, trims one short side of the rectangular container along the trim line. The movement of the punch is used to form a weak point on the opening side of one short side of the rectangular container above the trim line, which is thinner than the other side. A trimming device for rectangular containers, characterized by the following features.

2. The trimming device for a rectangular container according to claim 1, characterized in that the longitudinal axis drive unit, the first minor axis drive unit, and the second minor axis drive unit are each driven independently of each other.

3. The aforementioned longitudinal axis drive unit is driven to move the punch in the longitudinal axis direction, and in cooperation with the die, one short side of the rectangular container is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is closer to the short side, are driven to move the punch in the short-axis direction and tilt the punch, and in cooperation with the die, the short side of one of the long sides of the rectangular container connected to the short side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is furthest from the short side, are driven to move the punch in the short-axis direction, returning the punch from an inclined state to a state parallel to the long axis, while in cooperation with the die, the uncut portion of the long side is trimmed along the trim line. From the state of the punch after trimming is complete, the longitudinal axis drive unit is driven in the reverse direction to move the punch in the longitudinal axis direction, and in cooperation with the die, the other short side of the rectangular container is trimmed along the trim line. From the state in which the trimming is completed, the first short-axis drive unit and the second short-axis drive unit are driven to move the punch parallel to the other long side of the rectangular container, and in cooperation with the die, the uncut portion of the other short side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is closer to the other short side, are driven to move the punch in the short-axis direction and tilt the punch, and in cooperation with the die, the other short side of the other long side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is furthest from the other short side, are driven to move the punch in the short-axis direction, returning the punch from an inclined state to a state parallel to the long axis, while in cooperation with the die, the uncut portion of the other long side is trimmed along the trim line. From the state of the punch after trimming is complete, the long-axis drive unit is driven to move the punch in the long-axis direction, and in cooperation with the die, the uncut portion of the one short side is trimmed along the trim line. A trimming device for rectangular containers according to claim 1 or 2.

4. A trimming device for a rectangular container, having an open end and a bottom at the other end, and a rectangular cross-sectional shape parallel to the bottom surface, cuts the rectangular container along a plane that includes a predetermined trim line parallel to the bottom surface, A die is integrally supported with respect to the trimming device body, accommodates the outer circumference of the rectangular container, and is arranged along the trim line. A punch housed inside a rectangular container with a predetermined gap between the inner cross-sectional shape of the rectangular container and the punch being supported by the trimming device body so as to be movable in a plane parallel to the bottom surface, The punch is moved along the longitudinal axis in the cross-sectional shape of the rectangular container by a longitudinal axis drive unit, A first short-axis drive unit moves the punch along the short axis direction in the cross-sectional shape of the rectangular container, A second short-axis drive unit is arranged alongside the first short-axis drive unit along the long axis and moves the punch along the short axis in the cross-sectional shape of the rectangular container, A trimming method for a rectangular container in a trimming device comprising the following: The aforementioned longitudinal axis drive unit is driven to move the punch in the longitudinal axis direction, and in cooperation with the die, one short side of the rectangular container is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is closer to the short side, are driven to move the punch in the short-axis direction and tilt the punch, and in cooperation with the die, the short side of one of the long sides of the rectangular container connected to the short side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is furthest from the short side, are driven to move the punch in the short-axis direction, returning the punch from an inclined state to a state parallel to the long axis, while in cooperation with the die, the uncut portion of the long side is trimmed along the trim line. From the state of the punch after trimming is complete, the longitudinal axis drive unit is driven in the reverse direction to move the punch in the longitudinal axis direction, and in cooperation with the die, the other short side of the rectangular container is trimmed along the trim line. From the state in which the trimming is completed, the first short-axis drive unit and the second short-axis drive unit are driven to move the punch parallel to the other long side of the rectangular container, and in cooperation with the die, the uncut portion of the other short side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is closer to the other short side, are driven to move the punch in the short-axis direction and tilt the punch, and in cooperation with the die, the other short side of the other long side is trimmed along the trim line. From the state of the punch after trimming is complete, the first short-axis drive unit and the second short-axis drive unit, one of which is furthest from the other short side, are driven to move the punch in the short-axis direction, returning the punch from an inclined state to a state parallel to the long axis, while in cooperation with the die, the uncut portion of the other long side is trimmed along the trim line. From the state of the punch after trimming is complete, the long-axis drive unit is driven to move the punch in the long-axis direction, and in cooperation with the die, the uncut portion of the one short side is trimmed along the trim line. A method for trimming a rectangular container, When the aforementioned longitudinal axis drive unit is driven to move the punch in the longitudinal axis direction, and in cooperation with the die, trims one short side of the rectangular container along the trim line, the movement of the punch is used to form a weaker portion on the opening side of one short side of the rectangular container above the trim line, where the thickness is thinner than the other side. A method for trimming a rectangular container, characterized by the features described above.

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