JP3821769B2 - Deburring device for outer periphery of molded products - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is used when machining a molded product having a curved surface or curved shape such as a frame or housing of a liquid crystal screen of a portable telephone or a notebook computer, an automobile instrument cover, or a home appliance, and cutting the periphery of the molded product. More particularly, the present invention relates to a deburring device for outer periphery of a molded product for cutting and finishing a molding burr and a gate of an outer peripheral portion of a molded product having a thin shape.
[0002]
[Prior art]
In general, when performing outer peripheral finishing of molded products with irregular shapes such as curved surfaces and curves, deburring is performed by manually removing molded burrs and gates to some extent with nippers and electric cutting tools, and then finishing them with a file or sandpaper. Was done. However, when using a hand tool, the efficiency is very poor, the dimensional accuracy is poor, and many defective products are produced, so that stable production is not possible and profitability is not good. In addition, when using a rotary blade such as an end mill, blurring and chatter occur, the finished surface accuracy deteriorates, the workpiece surface of the workpiece escapes and chipped, and the rotary blade easily bites into a defective product. The accuracy was unstable and the product yield was poor. In addition, since dust is generated at this time, the working environment is poor. In particular, when performing outer peripheral finishing of molded products that are curved and curved with thin shapes, the molded product tends to bend, warp, crack, or crack during processing, so concentrate your work. It had to be done and it took a lot of work and the workability was bad.
[0003]
In addition, as a peripheral deburring device for automatically cutting and finishing the outer periphery of the molded product or the like by machining, a mill or NC machine tool equipped with a copying device is used. When a deburring process is performed on a molded product with a low strength of the material itself in a molded product or a molded product of synthetic resin or rubber, when a rotary blade such as an end mill attached to a deburring device for the outer periphery is applied to the material surface, The rotary blade was bitten and seizure was likely to occur. In addition, when using a rotary tool such as an end mill, vibration and noise were generated by the rotation of the motor. Further, when a thin molded product or the like is cut with the rotary blade, the material surface of the workpiece is escaped or chipped, and it is easy to produce a defective product. Moreover, in the case of using an NC machine tool, a large amount of equipment and maintenance costs are required, a skilled programmer must be employed, and it is difficult for a micro enterprise to purchase an NC machine tool. Moreover, when performing deburring of magnesium alloy products in non-ferrous metals, if powdered chips such as grinder processing are deposited, magnesium chips may ignite or rotary blades such as end mills. If the cutting amount is too small, the magnesium chips will easily ignite, and the surrounding oil may catch fire and cause a fire, cutting conditions are very difficult, and deburring for mass production. It was difficult to ensure safety. For this reason, the peripheral deburring of magnesium alloy products has not been performed by machining.
[0004]
For this reason, the present inventor performs deburring by machining and improves dimensional accuracy, is optimal for deburring processing for mass production, can be processed without distortion in the workpiece, and the blade replacement period is extended. Japanese Patent Application No. 11-340585, Japanese Patent Application No. 11-340585, a patent application for reducing the machining cost and further enabling peripheral finishing of magnesium alloy products with high precision and safety, and cutting deburring by machining. This is the place proposed in Japanese Patent Application No. 11-363893 and Japanese Patent Application No. 11-363899. The structure of Japanese Patent Application No. 11-340585 is a structure in which the work rotates and the cutter moves left and right. The structure of Japanese Patent Application No. 11-363893 has a structure in which the work moves back and forth and the tool moves left and right. Furthermore, the structure of Japanese Patent Application No. 11-363899 was such that the workpiece was fixed and the cutter moved back and forth and left and right.
[0005]
[Problems to be solved by the invention]
However, Japanese Patent Application No. 11-340585 is suitable for processing a curve close to a circle, and it has been difficult to process shapes other than those shown in FIG. Japanese Patent Application No. 11-363893 and Japanese Patent Application No. 11-363899 are suitable for machining a curve close to a rectangle, and it is possible to finish the outer periphery of a workpiece having a shape as shown in FIGS. 4 (b) to 4 (e). However, it has been difficult to process a waveform having a waveform as shown in FIG. Further, when performing the above-described machining, for example, when a workpiece having a shape as shown in FIG. 4 (e) is to be finished, generally three cutting tools are used as shown in FIG. 5 (b). Since the section is reciprocated by each of the cutting tools 1, 2, and 3, the driving mechanism is complicated, and it is difficult to make adjustments so as to eliminate the level difference of the finished surface at the switching position of the cutting tool and maintain the surface accuracy. Met. If only the cutting tool 1 is used at this time, the A section is good and the B section can be cut, but the cutting angle is bad, so chattering occurs and it is difficult to obtain a clean finish surface. There was a risk that the cutting surface of the cutting tool 1 would not hit and the escape portion would hit.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a deburring device for the outer periphery of a molded product that can process a curved line close to a circle or a rectangle or a wave-shaped curve with a single cutting tool and has a good finished surface.
[0007]
[Means for Solving the Problems]
The present invention has been made to solve the above problems, that is, a molding in which a work is mounted on a work mounting base having a forming cam fixed to the lower part, and the work is moved back and forth to cut the outer periphery thereof. In the deburring device for the outer periphery of the product, an angle holding cam for always maintaining the cutting angle of the cutting tool attached to the tool rest at a predetermined angle with respect to the outer periphery of the work is further below the forming cam than the forming cam. A turret support plate that supports the turret is mounted with an angle holding roller that is fixed and abuts the angle holding cam at the upper end, and a turret support for rotating the turret is provided. A structure is provided at the bottom of the board. In addition, the tool post may be arranged on both sides of the work mounting base, and as a rotating means, the lower part and one end of the tool post supporting plate are fixed, the bearing that supports the shaft, and the other end of the shaft. It is preferable to use at least a protrusion that protrudes and an air cylinder that is connected to the tip of the protrusion and disposed on the base.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 and FIG. 2 are diagrams showing an embodiment of the present invention, which will be described based on this. (1) is a base of the present apparatus formed in a double, (2) is a metal work mounting base that moves back and forth in the center of the base (1) by a feeding cylinder (not shown). The shape of the mounting base (2) is formed in accordance with the shape inside the workpiece (W). (3) is a forming cam integrally formed on both lower sides of the work mounting base (2), and the forming cam (3) has a shape that serves as a reference for the outer peripheral finish dimension of the work (W). Has been quenched. The forming cam (3) may be fixed to the work mounting base (2) with a bolt and attached in a replaceable manner. (4) is a rotatable forming roller in contact with the outer periphery of the forming cam (3). (5) is a tool post in which the forming roller (4) is attached to the lower end, and the tool post (5) is arranged on both sides of the work mounting base (2) so as to be movable left and right. The workpiece mounting base (2), the forming cam (3), the forming roller (4), and the tool post (5) are parts used in Japanese Patent Application No. 11-363893 proposed by the present inventor. It is recommended to use the same structure as The tool post (5) is not necessarily arranged on both sides of the work mounting base (2), but may be arranged only on one side. At this time, one side of the forming cam (3) and the forming roller (4) is unnecessary, and one side of each component to be described later attached to the tool post (5) is also unnecessary.
[0009]
(6) is an angle holding cam fixed to the lower part of the work mounting base (2) and on both lower sides of the forming cam (3). The cutting angle of the cutting tool (11) attached to (5) is always kept at a predetermined angle. The angle holding cam (6) may be fixed to the work mounting base (2) with a bolt and attached in a replaceable manner. (7) is an angle holding roller that comes into contact with the angle holding cam (6), and (8) is for attaching the angle holding roller (7) to the upper end and supporting the tool post (5). It is the arranged tool post support board. (9) is a rotating means that is attached to the lower part of the tool post supporting plate (8) and that allows the tool post (5) to turn. The rotating means (9) is the tool post supporting plate. A shaft (91) having a lower end and one end fixed to (8), a bearing (92) supporting the shaft (91) and fixed to the base (1), and the other end of the shaft (91) A protrusion (93) that is fixed and protrudes, and an air cylinder (94) that is connected to the tip of the protrusion (93) and disposed on the base (1), and the like. A constant pressing force is continuously applied to the protrusion (93) by the air cylinder (94). (10) is a horizontal moving means for moving the tool post (5) left and right and urging it with a constant pressing force. The horizontal moving means (10) is connected to the rear end of the tool post (5). And a press air cylinder attached to the upper surface of the tool rest support plate (8) and a guide member using a rolling bearing for smoothly sliding the tool rest (5). Use it. The guide member is not limited to the above-described one, and may have a structure including a track and a guide portion. (12) is a work pressing means provided for pressing the work (W) from above.
[0010]
Next, the operation of the present invention will be described. First, attach the cutting tool (11) to the left and right tool rests (5), place the work (W) on the work mounting base (2), and press the entire upper surface of the work (W) with the work holding means (12). Keep it fixed. And it is moved beforehand from the position of FIG. 3B to the position of FIG. First, the work mounting base (2) on which the work (W) is mounted by unillustrated feeding means is moved back and forth at once from the state of FIG. 3 (a) to (b) as indicated by the white arrow in the figure. At this time, the forming roller (4) slides while being abutted along the forming cam (3) and is moved to the center by the pressing cylinder of the horizontal moving means (10) arranged on the left and right. Since a constant pressing force is applied in the direction, the cutting tool (11) attached to the tool post (5) moves as shown by a two-dot chain line in the drawing and cuts at once. Further, at this time, the angle holding roller (7) slides while being in contact with the angle holding cam (6), and the protrusion (by the expansion and contraction of the air cylinder (94) of the rotating means (9) arranged on the left and right. 93) is rotated as shown by the arrow in the figure, and a constant pressing force is applied to the projection (93), so that the cutting angle of the cutting tool (11) is always maintained at a predetermined angle, and the workpiece ( This is because the finished state of the outer peripheral surface of W) becomes good. It should be noted that when the outer periphery of the workpiece (W) is cut, the cutting tool (11) should bite in about 0.5 mm.
[0011]
Based on FIG. 5A, the case where the present invention performs the deburring process of the workpiece (W) shown in FIG. First, the tip of the cutting tool (11) bites into the workpiece (W) by the horizontal moving means (10) and the cutting edge is tilted clockwise by the rotating means (9), so that the cutting tool (11) is substantially perpendicular to the outer shape of the workpiece (W). The curve of the A section is cut while the angle is maintained. At this time, the movement of the work (W) gradually moves rightward while rotating. Next, when the section B is reached, the cutting tool (11) moves in the front-rear direction with a constant pressing force applied from the lateral direction to cut the plane. When reaching the C section, the cutting edge of the cutting tool (11) is tilted to the left and moved to the left while cutting the curve in the C section to complete the deburring process. At this time, since the horizontal direction of the cutting tool (11) is regulated by the forming cam (3) and the inclination of the cutting tool (11) is regulated by the angle holding cam (6), deburring is performed at an optimum cutting angle. Can be done. Accordingly, the turret (5) is arranged on both sides and the workpiece (W) is moved in the front-rear direction, whereby the deburring process having the shape as shown in FIGS. 4 (a) to 4 (e) is completed at once. Further, in the present invention, similarly to Japanese Patent Application No. 11-363893, the work mounting base (2) moves smoothly while sliding back and forth, so that vibration and noise are not generated and the manufacturing cost is low. At the same time, there is very little heat generated by cutting, there is almost no risk of ignition of magnesium chips, magnesium alloy products can be easily machined by machining, and mass-production deburring is possible. Precision machining is possible.
[0012]
【The invention's effect】
The present invention is configured as described above and has the effects described below.
[0013]
The outer periphery of the molded product in which the workpiece (W) is mounted on the workpiece mounting base (2) with the forming cam (3) fixed to the lower portion as in claim 1 and the outer periphery is cut by moving the workpiece (W) back and forth. In the deburring device, the angle holding cam (6) for always holding the cutting angle of the cutting tool (11) attached to the tool post (5) at a predetermined angle with respect to the outer periphery of the work (W) is a forming cam. A tool that is fixed to the lower part of the work mounting base (2) and is attached to the angle holding cam (6) at the upper end and supports the tool rest (5). By providing a structure in which the pedestal support plate (8) is arranged and a rotating means (9) for making the turret (5) rotatable is provided at the lower part of the turret support plate (8), a circular shape is obtained. Alternatively, a single bite (11) can be used to process a curve close to a rectangle or a wave-shaped curve. Since there is no switching of bytes 11 together, it becomes a high good surface finish entire finished surface is smooth and and finishing accuracy. Further, since there is only one attachment part of the cutting tool (11) and its control, the structure is simple and the control is easy, and the cost can be reduced.
[0014]
By arranging the tool post (5) on both sides of the work mounting base (2) as in claim 2, deburring of the work (W) having a shape as shown in FIGS. Since it can be finished and a uniform cutting load is applied to both sides of the workpiece (W), the distortion of the workpiece (W) is reduced, making it ideal for mass production that can be easily deburred even with molded products of low strength. And processing time can be shortened.
[0015]
As a turning means (9) as shown in claim 3, as a rotating means (9), a shaft (91) having a lower end and one end fixed to the tool rest support plate (8), a bearing (92) supporting the shaft (91), The angle is maintained by using at least a projection (93) fixed to the other end of the shaft (91) and an air cylinder (94) connected to the tip of the projection (93). The cam (6) makes it possible to always keep the optimum cutting angle of the cutting tool (11) at a predetermined angle. Moreover, since the structure is simple, the predetermined angle can be maintained without being displaced for a long period of time.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a main part of an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a front main part of the present embodiment.
FIG. 3 is an explanatory view showing the movement of the cutting tool by the forming cam and the angle holding cam of the embodiment.
FIG. 4 is an explanatory diagram showing an example of an irregular workpiece shape that can be cut according to the present embodiment.
FIG. 5 is an explanatory diagram comparing the product of the present invention and a conventional product when cutting an irregular workpiece shape.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Work mounting base 3 Forming cam 4 Forming roller 5 Tool post 6 Angle holding cam 7 Angle holding roller 8 Tool post supporting board 9 Turning means
91 axes
92 Bearing
93 Protrusion
94 Air cylinder
11 bytes W Work

Claims (3)

A work mounting base (2) that moves back and forth in the center of the base (1) is provided, and a forming cam (3) that serves as a reference for the outer peripheral finish dimension of the work (W) is provided at the lower part of the work mounting base (2). Molded product in which a tool post (5) that is fixed and attached to the lower end of the forming roller (4) to be brought into contact with the forming cam (3) and moved to the left and right is disposed on at least one side of the work mounting base (2). In the outer peripheral deburring device, the cutting angle of the cutting tool (11) attached to the tool post (5) is always predetermined below the forming cam (3) with respect to the outer periphery of the work (W). An angle holding cam (6) for holding at an angle is fixed to the work mounting base (2), and an angle holding roller (7) contacting the angle holding cam (6) is attached to the upper end and the tool post A tool post supporting plate (8) for supporting (5) is arranged, and the blade A deburring device for the outer periphery of a molded product, characterized in that a rotating means (9) for making the pedestal (5) rotatable is provided at the lower part of the turret support plate (8). The deburring device for outer periphery of a molded article according to claim 1, wherein the tool post (5) is arranged on both sides of the work mounting base (2). The rotating means (9) includes a shaft (91) having a lower end and one end fixed to the tool rest support plate (8), and a bearing that supports the shaft (91) and is fixed to the base (1). (92), a protrusion (93) that is fixed and protrudes to the other end of the shaft (91), and an air cylinder that is connected to the tip of the protrusion (93) and disposed on the base (1) ( 94) The deburring device for the outer periphery of a molded product according to claim 1, comprising at least 94.

Images