JPH11320249A - Method and apparatus for manufacturing metal molded parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a metal molded part capable of automating a deburring operation, thereby increasing productivity, improving finishing accuracy, and performing a highly safe deburring operation. Provide equipment. SOLUTION: After molding a metal molded part by using a predetermined molding device, when removing burrs on the peripheral part, a gear-shaped cutting tool is moved while rotating along the peripheral part of the metal molded part. Then, a roller-shaped pressing tool provided with an elastic layer in the vicinity of the surface is rolled in a pressed state along the peripheral edge of the metal molded component, thereby removing the peripheral edge of the metal molded component. Remove burrs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a metal molded component mainly composed of, for example, magnesium or a magnesium alloy.

[0002]

2. Description of the Related Art Conventionally, when manufacturing parts such as exterior cases of household electric appliances, lightweight and easily moldable synthetic resins are widely used as main materials. However, for parts made of such synthetic resin,
It is known that harmless treatment after disposal is difficult. For this reason, in recent years, from the viewpoint of global environmental conservation, materials that can be easily treated harmlessly after disposal instead of synthetic resins have been required. In this connection, for example, application of magnesium or a magnesium alloy is being considered. Magnesium and magnesium alloys are relatively lightweight,
Further, since its melting point is low (about 600 to 650 ° C.),
Injection molding can be performed by a method similar to the case of a synthetic resin that has been conventionally used, and it is possible to cope with molding of a complicated shape.

[0003]

By the way, in the injection molding process, usually, a molded part corresponding to a peripheral portion of the molded part, that is, a joint of a molding die, a corner of a concave portion formed in the die, or the like. Burrs are formed on the periphery of. Conventionally, deburring for removing such burrs has been performed manually, for example, by brushing. However, when deburring is performed manually, there is a possibility that the accuracy of the operation varies, and it is difficult to ensure stable quality. In this case, the productivity is low and the processing cost is high. Furthermore, an increase in the number of production units requires a large number of manpower.

[0004] Further, shavings and metal powders of various shapes and sizes are generated with the deburring. However, when magnesium or a magnesium alloy is used as the material of the molded part, it is easy to ignite when the powder becomes a fine powder having a certain size or less. Therefore, special attention must be paid to the treatment of shavings.

The present invention has been made in view of the above technical problems, and can automate the deburring operation, thereby increasing productivity, finishing accuracy, and safety. It is an object of the present invention to provide a method and an apparatus for manufacturing a metal molded product capable of performing the following.

[0006]

The invention according to claim 1 of the present application (hereinafter, referred to as a first invention) is to form a metal molded part by using a predetermined molding apparatus and then remove burrs on a peripheral portion thereof. In doing so, the gear-shaped cutting tool is moved while rotating along the peripheral edge of the metal-formed part to cut off burrs, and then a roller-shaped pressing tool provided with an elastic layer near the surface is subjected to the metal-forming. It is characterized in that burrs on the peripheral portion of the metal molded component are removed by rolling in a pressed state along the peripheral portion of the component. The roller-shaped pressing tool is in rolling contact with the pressed part along the peripheral edge of the molded part, but since the elastic part is provided near the surface thereof, the molded part is not deformed or distorted. .

Further, the invention according to claim 2 of the present application (hereinafter referred to as “the invention”)
The second invention) is that the surface of the roller-shaped pressing tool is
It is characterized in that a file surface having a predetermined roughness is provided.

Further, the invention according to claim 3 of the present application (hereinafter referred to as “the invention”)
According to the third aspect of the present invention, a recognition mark is attached to a predetermined position on the metal molded component, the mark is recognized by predetermined recognition means, and the cutting tool and the cutting tool are recognized based on the obtained position information. It is characterized in that the positional relationship between the pressing tool and the metal molded part is adjusted.

Further, in the invention according to claim 4 of the present application (hereinafter, referred to as a fourth invention), the metal molded part is formed by using magnesium or a magnesium alloy as a main material, and the metal part is removed from the metal molded part. When treating the burrs, the burrs that have been removed are selected to be smaller than a predetermined size, and the burrs having a size smaller than the predetermined size are collected and burned by a predetermined combustion device.

The invention according to claim 5 of the present application (hereinafter, referred to as a fifth invention) is directed to an apparatus for manufacturing a metal molded part capable of removing a burr on a peripheral portion after molding the metal molded part. It has a gear-shaped cutting tool that moves while rotating along the periphery of the part to cut off burrs, and has an elastic layer near the surface, and rolls in a pressed state along the periphery of the metal molded part Accordingly, a deburring device including a roller-shaped pressing tool for removing burrs on the peripheral edge of the metal molded component is provided.

The invention according to claim 6 of the present application (hereinafter referred to as “the invention”)
A sixth aspect of the present invention is characterized in that the roller-shaped pressing tool has a file surface with a predetermined roughness on its surface.

Further, the invention according to claim 7 of the present application (hereinafter referred to as “the invention”)
According to a seventh aspect of the present invention, the cutting tool and the pressing tool are configured such that the deburring device uses the cutting tool and the pressing tool based on position information obtained by predetermined recognition means for recognizing a recognition mark attached to a predetermined position on a metal molded part. And a position adjusting means for adjusting the positional relationship between the tool and the metal molded part.

Still further, in the invention according to claim 8 of the present application (hereinafter, referred to as an eighth invention), the metal molded part is formed by using magnesium or a magnesium alloy as a main material, and is removed from the metal molded part. As means for treating the burrs that have been removed, sorting means for sorting out burrs having a size smaller than a predetermined size among removed burrs, collecting means for collecting burrs having a size smaller than the predetermined size, and combustion means for burning with a predetermined combustion device. It is characterized by having.

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG.
BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional explanatory drawing of the injection molding machine which shape | molds the metal molded component concerning this Embodiment, and the shaping | molding apparatus provided with the shaping | molding die. In this molding apparatus, a powdery chip material 27 of magnesium or a magnesium alloy is put into a hopper 28 communicating with a cylinder 26 of an injection molding machine 30 as a molding material. A screw member 22 extending in the longitudinal direction is provided inside the cylinder 26, and the chip material 27 supplied into the cylinder 26 via the hopper 28 is heated by a heating member provided around the cylinder 26. While being heated and melted by the heater 25, the motor 23 is driven to rotate the screw member 22, so that a pair of molding dies 21 A and 2
Pressurized and sent to 1B side. And this molten metal 2
4 is injection-filled by a predetermined amount into a molding cavity formed by the molding dies 21A and 21B from a nozzle 26a at a front end of the cylinder 26 for each molding cycle,
A metal molded part 5 corresponding to the shape of the molding cavity is molded.

FIG. 2 shows a metal molded part 5 formed by the above-mentioned forming apparatus. In the metal molded part 5, burrs 6 are formed on peripheral portions corresponding to joints of the molding dies 21A and 21B (see FIG. 1) and corners of concave portions formed on the mold 21B side. I have. In order to remove the burr 6 after the injection molding, the apparatus for manufacturing a metal molded part according to the present embodiment includes a deburring apparatus described below. This deburring device is provided with a pedestal 16 on which the metal molded component 5 is mounted, and a cylinder 18 for pressing and fixing the metal molded component 5 mounted on the pedestal 16 from above. At the time of the picking operation, the metal molded part 5 is
As shown by the imaginary line, they are held and fixed between them. The method of holding and fixing the metal molded component 5 is not limited to this, and various methods can be considered. For example, it is conceivable to provide a screw or the like at a predetermined position on the back side of the molded component 5 and tighten and fix the bolt member. When the metal molded part 5 is made of iron, it can be fixed by the magnetic force of a magnet.

FIG. 3 is a perspective view showing an outline of a deburring process by the deburring apparatus according to the present embodiment. The deburring device includes a gear-shaped cutting tool 2 that moves while rotating along the peripheral edge of the metal molded component 5, and a roller-shaped cutting tool 2 that rolls in a pressed state along the peripheral edge of the metal molded component 5. And a pressing tool 3. The cutting tool 2 is manufactured by processing tool steel into a gear shape and then performing a predetermined heat treatment. On the other hand, the pressing member 3 is manufactured by forming an elastic layer made of an elastic material such as rubber on a predetermined roller body near the surface thereof. Further, in the present embodiment, the pressing tool 3 is provided with a cloth file (not shown) on its circumferential surface.
It is covered with.

The cutting tool 2 and the pressing tool 3 are respectively
Supported by support members 14A and 14B (shown by phantom lines)
These support members 14A and 14B are
By sliding on a bar-shaped guide frame member 13 (shown by phantom lines) provided so as to extend in parallel with the periphery (vertical and horizontal directions) of the metal-formed part 5 on the upper or lower peripheral edge thereof. Can move along. When the burr 6 is present at the peripheral edge of the metal molded part 5 in the height direction, the guide frame member 13 is provided in parallel with the height direction of the metal molded part 5 corresponding to the burr 6. ,
The cutting tool 2 and the pressing tool 3 may be configured to be able to move vertically along the peripheral edge of the metal molded component 5.

In the deburring step by the deburring apparatus having such a configuration, first, the cutting tool 2 slides on the guide frame member 13 and moves along the peripheral edge of the metal molded part 5 while rotating. Then, the burrs 6 on the periphery are scraped off. Subsequently, the pressing tool 3 slides on the guide frame member 13 and rolls in a pressed state along the peripheral edge of the metal molded component 5, and the fine burrs remaining on the peripheral edge (those which cannot be seen with the naked eye) ). As a result, the burrs 6 on the peripheral edge of the metal molded part 5 can be completely removed. Here, the pressing tool 3 is pressed against the surface of the metal molded component 5, but since the pressing tool 3 has an elastic layer near the surface, the metal molded component 5 is deformed or distorted. The burrs 6 can be removed without any trouble. Further, in the present embodiment, the circumferential surface of the pressing tool 3 is covered with a cloth file having a predetermined roughness, and the pressing tool 3 presses against the peripheral edge while scraping fine burrs 6. Therefore, the burrs 6 can be removed more effectively. still,
The present invention is not limited to a cloth file, and any form may be used as long as the surface thereof has a roughness file surface capable of scraping fine burrs. Although not shown for clarity of the drawing, the deburring apparatus has a pedestal 16 on which the metal molded component 5 is mounted and a pedestal 16 mounted on the pedestal 16 as shown in FIG. And a cylinder 18 for pressing and fixing the metal molded part 5 from above.
Are held and fixed between them.

FIGS. 4A to 4C show changes in the state at the peripheral edge of the metal molded part in the deburring step. 4A to 4C, burrs generated on the peripheral edge of the metal molded part are schematically enlarged. In the state shown in FIG. 4A, burrs 6a (that is, coarse burrs) generated at the time of forming exist on the peripheral portion (the central portion in the figure) of the metal molded component 5, and the cutting tool 2 Is approaching. The cutting tool 2 moves along the peripheral edge of the molded part 5 while rotating, and removes the coarse burrs 6a.
As shown in FIG. 2B, fine burrs 6b may remain on the periphery of the metal molded component 5. Subsequently, the pressing tool 3
When rolling while being pressed against the surface of the metal molded part 5, as shown in FIG. 4c, the fine burr 6b is crushed by the file surface on the circumference of the pressing tool 3, and the metal molded part 5 is crushed. The burrs on the periphery are completely removed.

Next, with reference to FIG. 5, a description will be given of a position adjusting operation for adjusting the positional relationship between the cutting tool 2 and the pressing tool 3 and the metal molded part 5 in the deburring operation. In the present embodiment, the metal molded part 5 is a computer aided design (CAD).
In order to adjust the positional relationship between the cutting tool 2 and the pressing tool 3 and the metal molded part 5, they are attached to the corners (two places in the present embodiment) of the upper surface of the molded part 5. 5 mm square recognition mark 8 is used. The recognition mark is more preferably formed by a molding die in the molding apparatus when the metal molded part 5 is injection-molded. In this position adjustment work, first, a visual sensor 15 such as a CCD camera or an optical sensor is placed above a metal molded part 5 arbitrarily arranged in a preset three-dimensional coordinate system of the X axis, the Y axis, and the Z axis.
Is moved to detect the recognition mark 8. Based on the detected mark position information, the metal molded part 5 is moved so that one corner (the lower left corner in FIG. 5) coincides with the origin of the three-dimensional coordinate system. Place.

As described above, by positioning the molded part 5 designed by CAD at a predetermined position in the coordinate system of the X, Y and Z axes set in advance, the position of the peripheral edge of the metal molded part 5 can be grasped. It is possible to do. Then, by adjusting the position of the guide frame member 13, that is, the positions of the cutting tool 2 and the pressing tool 3 based on the position information of the peripheral portion, it is possible to obtain good deburring work accuracy.

Next, a description will be given of a process of removing burrs from a metal molded part in the above-described deburring step.
FIG. 6 is an explanatory diagram conceptually showing the processing of the removed burrs. Metal cutting part 5 by the cutting tool 2 and the pressing tool 3
Is first applied to a mesh-like filter member 32 of a predetermined mesh, and is roughly classified according to its size. That is, in the filter member 32, a burr 6A of a predetermined size or more is left, and a burr 6B (hereinafter, referred to as a powder burr) of a certain size (less than 2 mm in the present embodiment) passes through the mesh of the filter member 32. Then, it is dropped into the container 33 below. The burrs 6A left on the filter member 32 can be reused.

The burr 6B dropped in the container 33 is fine powder and easily ignites, so that an appropriate treatment is performed.
That is, it is collected by the suction device 35 and the feed passage 35a
, And is supplied intermittently into the combustion container 41. In this case, for each supply, an appropriate amount of burr 6B is supplied according to the size of the combustion container 41 so as to favorably burn in the container 41. The burr 6B supplied into the combustion vessel 40 is burned by the gas burner 42 to become an oxide (magnesium oxide) 6C, and is accumulated in the processing vessel 44. As described above, in the apparatus for manufacturing a metal molded component according to the present embodiment, burrs removed from metal molded component 5 in the deburring step, particularly, fine powder burrs 6B
Can be automatically processed without manual work.

FIG. 7 is a perspective view showing the deburring apparatus 10 and a burr processing apparatus 40 for processing the burr removed from the metal molded part by the apparatus 10. In the deburring apparatus 10, the metal molded component 5 to be deburred is formed in a frame shape, and is fixed to the pedestal 31 by a clamp member 9 as a substantially L-shaped holder from the inside of the frame. ing. A rectangular guide frame member 13 that defines the positions of the cutting tool 2 and the pressing tool 3 is suspended from above so as to surround the pedestal 31. The guide frame member 13 is movable across two opposing sides thereof and is slidable in the direction of the arrow.
3a.

Further, the visual sensor 15 for recognizing the recognition mark 8 provided on the metal molded part 5 has a support member 3 for supporting the guide frame member 13 at the position.
It is controlled by a longitudinal member 37 that moves along 9 and can move freely above the pedestal 31.
In the deburring step, as described above, the pedestal 31
The visual sensor 15 is moved above the metal molded part 5 held thereon, and the mark 8 attached to the metal molded part 5 is moved.
Is detected. Based on the detected mark position information, the metal molded part 5 is arranged at a predetermined position in a preset coordinate system. Thus, the molded part 5 designed by CAD
Is located at a predetermined position in a preset coordinate system of the X, Y and Z axes, whereby the position of the peripheral part of the metal molded part 5 is grasped, and based on the positional information of the peripheral part, the cutting tool is used. 2 and the position of the pressing tool 3 are adjusted.

In the deburring apparatus 10, the cutting tool 2
And one pressing tool 3 are provided, and in the deburring process, they are sequentially activated. For this reason, the guide frame member 13 has a standby unit 1 for waiting the inactive cutting tool 2 or the pressing tool 3.
7, for example, as shown in FIG. 7, while the cutting tool 2 is moving along the guide frame member 13, the standby unit 17 causes the pressing tool 3 to wait. deep. Then, after the cutting tool 2 removes burrs on the peripheral edge of the metal molded component 5, the cutting tool 2 and the pressing tool 3 are removed.
And can be replaced.

The burrs 6 removed from the metal molded part 5 in the deburring apparatus 10 are first applied to a filter member 32 of a predetermined mesh provided on a lower surface of the pedestal 31 in a deburring apparatus 40, and a predetermined A burr 6B smaller than the size (less than 2 mm in the present embodiment) is dropped downward. The burrs 6B are collected by the suction device 35, and are sent to the combustion container 40 via the feed passage 35a in an appropriate amount for satisfactorily burning in the container 40. Then, the burr 6B sent into the combustion container 40 is burned by the gas burner 42 to become an oxide. As described above, in the apparatus for manufacturing a metal molded component according to the present embodiment, the deburring operation can be automated without manual operation, whereby the productivity is high, the finishing accuracy is good, and the safety is high. High deburring work can be performed.

[0028]

According to the first aspect of the present invention, a gear-shaped cutting tool is used to remove a burr on a peripheral portion after molding a metal molded part using a predetermined molding apparatus. The burrs are removed by rotating and moving along the periphery of the metal part, and then a roller-shaped pressing tool provided with an elastic layer near the surface is rolled in a pressed state along the periphery of the metal molded part. By doing so, the burrs on the peripheral edge of the metal molded part are removed, so that the deburring work can be automated without manual work, thereby enabling high deburring work with high productivity and good finishing accuracy. Become. In this case, although the pressing tool is pressed against the metal molded component, since the pressing tool includes the elastic layer near the surface thereof,
It does not deform or distort the molded part.

According to the second aspect of the present invention, the surface of the roller-shaped pressing member is provided with a filed surface having a predetermined roughness, and is pressed against the peripheral portion while scraping off the burrs. Therefore, burrs can be removed more effectively.

Further, according to the third aspect of the present invention, a recognition mark is attached to a predetermined position on the metal molded part,
The mark is recognized by predetermined recognition means, and the positional relationship between the cutting tool and the pressing tool and the metal molded component is adjusted based on the obtained position information, so that good deburring work accuracy can be obtained. .

Still further, according to the fourth invention of the present application, the metal molded part is molded using magnesium or a magnesium alloy as a main material, and when the burr removed from the metal molded part is treated, it is removed. The burrs having a size smaller than a predetermined size are sorted out, and the burrs having a size smaller than the predetermined size are collected and burned by a predetermined combustion device. The deburring operation can be performed with high safety.

According to the fifth aspect of the present invention, in an apparatus for manufacturing a metal molded part capable of removing burrs at the peripheral part after molding the metal molded part, the apparatus rotates along the peripheral part of the metal molded part. A gear-shaped cutting tool that moves while shaving burrs and an elastic layer near the surface, and rolls in a pressed state along the periphery of the metal molded part, thereby forming the metal molded part. A deburring device equipped with a roller-shaped pressing tool that removes burrs on the peripheral edge of the device can be automated without manual work, thereby increasing productivity and finishing. Deburring work with good accuracy becomes possible. In this case, the pressing tool is
Although it is pressed against the metal molded part, since the elastic layer is provided near the surface thereof, the molded part is not deformed or distorted.

According to the sixth aspect of the present invention, the roller-shaped pressing member has a file surface having a predetermined roughness on its surface, and can be pressed against the peripheral portion while rubbing off burrs. Therefore, burrs can be removed more effectively.

Further, according to the seventh aspect of the present invention, in the deburring apparatus, the deburring apparatus is configured to perform the recognition based on the position information obtained by the predetermined recognizing means for recognizing the recognition mark attached to the predetermined position on the metal molded part. Thus, the positional relationship between the cutting tool and the pressing tool and the metal molded component is adjusted, so that good deburring work accuracy can be obtained.

Still further, according to the eighth aspect of the present invention, the metal-formed part is formed using magnesium or a magnesium alloy as a main material, and as a means for treating burrs removed from the metal-formed part, the metal part is removed. Since there are provided sorting means for sorting burrs having a size smaller than a predetermined size from among the burrs formed, collecting means for collecting burrs having a size smaller than the predetermined size, and burning means for burning with a predetermined combustion device, fine Such powdery burrs can be automatically processed without manual operation, thereby performing a highly safe deburring operation.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view of an injection molding machine for molding a metal molded part and a molding apparatus including a molding die according to an embodiment of the present invention.

FIG. 2 is a perspective view of a metal molded part molded by the molding apparatus.

FIG. 3 is a perspective view showing an outline of a deburring process performed by the deburring apparatus according to the embodiment.

FIG. 4 is an explanatory diagram showing a state change of a peripheral portion of a metal molded component in the deburring step.

FIG. 5 is a perspective view showing an outline of position adjustment performed at the time of a deburring operation by the deburring apparatus.

FIG. 6 is an explanatory view conceptually showing processing of burrs removed by the deburring apparatus.

FIG. 7 is a perspective view showing the deburring apparatus and a burr processing apparatus for processing burr removed from a metal molded part by the apparatus.

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Eda Hiro Hiroki 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd.

Claims (8)

[Claims] 1. After forming a metal molded part using a predetermined molding apparatus, when removing burrs on the peripheral part, the gear-shaped cutting tool is moved while rotating along the peripheral part of the metal molded part. Then, a roller-shaped pressing tool provided with an elastic layer in the vicinity of the surface is rolled in a pressed state along the peripheral edge of the metal molded component to thereby remove the peripheral edge of the metal molded component. A method of manufacturing a metal molded part, comprising: removing burrs. 2. The method according to claim 1, wherein a surface of the roller-shaped pressing member is provided with a file surface having a predetermined roughness. 3. A mark for recognition is attached to a predetermined position on the metal molded part, the mark is recognized by predetermined recognition means, and the cutting tool and the pressing tool are recognized based on the obtained position information. 3. The method according to claim 1, wherein a positional relationship with the metal molded component is adjusted. 4. The metal molded part is molded using magnesium or a magnesium alloy as a main material, and when processing burrs removed from the metal molded part, those having a size smaller than a predetermined size are selected from the removed burrs. 2. The method according to claim 1, wherein the burr having a size smaller than the predetermined size is collected and burned by a predetermined combustion device.
A method for producing a metal molded part according to any one of claims 1 to 3. 5. A manufacturing apparatus for a metal molded part capable of removing burrs on the peripheral part after molding the metal molded part, wherein the gear moves while rotating along the peripheral part of the metal molded part to cut off the burrs. And a roller having an elastic layer in the vicinity of the surface and rolling in a pressed state along the peripheral edge of the metal molded component to remove burrs on the peripheral edge of the metal molded component An apparatus for manufacturing a metal molded part, comprising: a deburring device having a pressing member having a shape of a metal. 6. The roller-shaped pressing tool has a file surface with a predetermined roughness on its surface.
An apparatus for producing a metal molded part according to the above. 7. The cutting tool, the pressing tool and the deburring device, based on position information obtained by a predetermined recognizing means for recognizing a recognition mark provided at a predetermined position on a metal molded part. The apparatus for manufacturing a metal molded part according to claim 5, further comprising a position adjusting unit that adjusts a positional relationship with the metal molded part. 8. The above-mentioned metal molded part is molded using magnesium or a magnesium alloy as a main material, and as a means for treating burrs removed from the metal molded part, the removed burrs having a size smaller than a predetermined size are used. 8. The apparatus according to claim 5, further comprising: a sorting unit that sorts; a collecting unit that collects burrs having a size smaller than the predetermined size; and a combustion unit that burns with a predetermined combustion device. 9. 3. The apparatus for producing a metal molded part according to claim 1.