JP4103723B2 - Deburring method of resin pulley - Google Patents

Description

The present invention relates to a burr taking Way Method, in particular, in a pulley formed of a resin molding, it relates to a suitable burr takes way method used to remove burrs generated in the mold mating part.

  As a conventional technique for removing the molding burr of the resin molding rotating body, a cutting method, a shot blasting method, a brushing method, and the like are performed.

  However, in each of the above conventional methods, the cutting method cannot be used to absorb product variations because it is removed with a blade and a jig, and there is a problem that the outer surface of the resin-molded rotating body is damaged. Also, with shot blasting, it is very difficult to maintain shot grains, and with brushing, there is a problem that the removal dimension is not stable due to wear and deformation of the brush wire.

The present invention improves the above-mentioned various conventional problems, and its purpose is to provide a resin that can be efficiently and stably deburred by an easy management method without damaging the outer surface of the resin pulley. It is to provide a burr taking way method of the pulley.

The present invention, in order to achieve the above object, employing the technical means described below. That is, in the first aspect of the invention, the resin pulley (1) having a plurality of V-shaped grooves (1a) on the outer peripheral surface is rotated around the axis by the work rotating means (2), and the deburring tool (3). The metal strand (4) stretched between the two points is pressed against the rotating resin pulley (1), and the metal strand (4) is moved following the outer periphery of the resin pulley (1). In the deburring method of the resin pulley for removing the burr (5) generated by protruding from the outer surface of the V-shaped groove (1a) ,
The tension direction of the metal strand (4) is inclined by a predetermined angle with respect to the direction of the V-shaped groove (1a), and the metal strand (4) is pressed against the V-shaped groove (1a) . .

According to the first aspect of the present invention, the unevenness on the surface of the metal stranded wire (4) is used as a file effect, and the metal stranded wire (4) is bent to closely follow the outer periphery of the resin pulley (1). The burr (5) can be removed efficiently and stably without damaging the outer surface of the resin pulley (1).
In addition, the bottom of the V-shaped groove (1a) and the slopes on both sides can be deburred efficiently at a time, and the cycle time can be shortened. Also, even when a convex groove is formed on the side of the V-shaped groove (1a), the convex groove and the metal strand (4) intersect with each other by pressing at an angle, so that it is somewhat random. Even if the wire (4) is pressed against the burrs, the burrs (5) at the top of the convex grooves can be removed efficiently and stably.

In the second aspect of the invention, the pressing is performed at a predetermined angle after the metal wire (4) is pressed against the bottom of the V-shaped groove (1a) of the resin pulley (1). It is characterized in that an angle is given by swinging the wire (4) in a direction opposite to the right and left by -15 degrees metal .

  The invention according to claim 3 is characterized in that a stainless steel strand is used as the metal strand (4). According to the third aspect of the present invention, the stainless steel stranded wire is strong without rusting, and is easily available and inexpensive as a JIS standard product, so that the running cost can be suppressed.

In the invention described in claim 4, a plurality of metal strands (4) are provided in parallel to the deburring tool (3), and a plurality of deburring points are provided by the plurality of metal strands (4). Is performed in parallel. According to the fourth aspect of the present invention, the deburring can be efficiently performed and the cycle time can be shortened.

Further, the invention according to claim 5 is characterized in that the deburring tool (3) is provided with a break detecting means (6) for the metal strand (4). According to the invention described in claim 5 , when the break detecting means (6) detects the break of the stranded wire (4) during the automatic deburring operation, the automatic deburring operation is interrupted and a warning is given to the operator. Or the automatic deburring operation can be continued from the portion where the breakage is detected by replacing the spare deburring tool (3). As a result, no defective product is produced.

In addition , the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of a deburring device according to an embodiment of the present invention, in which (a) is a deburring tool 3 and (b) is a front view of a work rotating device 2. In FIG. 1A, the deburring tool 3 is formed in a U-shape that opens downward, and a wire rope (a metal strand) 4 is stretched between two points on both sides of the opening. And this deburring tool 3 is being fixed to the front-end | tip of the drive arm RB of the multi-axis robot which is not shown in figure, and can take a position and attitude | position freely with respect to a deburring workpiece.

  The resin molding rotary body 1 which is a deburring work is a resin pulley in the present embodiment (shown in cross section in FIG. 1B). The resin pulley 1 is positioned and gripped by a work rotating device (work rotating means) 2 such as a lathe, and is rotated about an axis. Incidentally, 2a in FIG. 1B is a rotating part, and 2b is a chuck claw for gripping a deburring work provided on the rotating part 2a.

  Moreover, the wire rope 4 in this embodiment uses a stainless steel strand. As a specific specification of the wire rope 4 in this embodiment, the diameter is 1 mm, more is 1 × 7 or 7 × 7, and the direction is Z or S (both are in accordance with Japanese Industrial Standards (JIS)).

  Next, the deburring method in the above configuration will be described. FIG. 2 is an enlarged view of part A of the cross section of the resin pulley 1 shown in FIG. The resin pulley 1 is gripped by the work rotating device 2 and rotated around the axis, the wire rope 4 is brought into contact with the end surface, and moved along the outer peripheral surface of the resin pulley 1, thereby causing burrs 5a generated on the outer peripheral surface. The burr 5b generated on the end face is removed.

  As for the rotation speed of the work rotating device 2, a large burr is first broken at a low speed rotation (50 to 100 rpm), and then the remaining fine burr is removed at a high speed rotation (500 to 800 rpm). However, this may be a method of removing burrs cleanly from one end at a constant speed from the beginning.

  A plurality of V-shaped grooves 1 a into which V-shaped projections of a belt (not shown) are fitted are formed on the outer periphery around the axis of the resin pulley 1. FIG. 3 is a diagram illustrating the relationship between the V-groove 1a and the wire rope 4 during deburring. FIG. 3 shows a case where two wire ropes 4 are provided in parallel with the pitch of the V-shaped grooves 1a.

  Basically, the wire rope 4 is pressed against the deburring work in parallel to perform the deburring work. In this embodiment, after pressing the wire rope 4 against the bottom of the V-shaped groove 1a of the resin pulley 1, The 15 ° wire rope 4 is swung left and right to make an angle (see FIG. 3), thereby deburring the left and right slopes of the V-shaped groove 1a at the same time. As a result, a plurality of surfaces at a plurality of locations can be deburred simultaneously, and cycle time can be shortened. The tension of the wire rope 4 is such that it is bent to some extent when the wire rope 4 is pressed against the resin pulley 1.

  FIG. 4 shows a specific schematic configuration of the deburring tool 3 in one embodiment of the present invention, where (a) is a side view and (b) is a front view. In the deburring tool 3 of FIG. 4, three wire ropes 4 are provided in parallel and alternately. Each wire rope 4 is pulled upward by a coil spring 7 in the figure to maintain its tension. Reference numeral 6 in the figure denotes a proximity switch of a break detection switch (break detection means) for detecting breakage of the wire rope 4.

  When the wire rope 4 is cut, the tensioned coil spring 7 extends and pushes up the detection unit 8. Therefore, the proximity switch 6 detects that the detection unit 8 has approached and the wire rope 4 is cut. It is determined that it has occurred. In this embodiment, a tool changer TC is provided between the drive arm RB of the multi-axis robot and the deburring tool 3. When a break is detected in any of the wire ropes 4, the deburring operation is interrupted, and the tool changer TC replaces the spare deburring tool 3 to resume the deburring operation near the portion where the break is detected. It is supposed to be.

  Next, features in the present embodiment will be described. First, the resin pulley 1 is rotated around the axis by the work rotating device 2 and the wire rope 4 stretched between two points of the deburring tool 3 is pressed against the rotating resin pulley 1 to be placed on the outer periphery of the resin pulley 1. The burr 5 generated by projecting to the outer surface of the resin pulley 1 is removed by moving it along the surface. According to this, the unevenness on the surface of the wire rope 4 is used as a file effect, and the wire rope 4 bends and closely follows the outer periphery of the resin pulley 1, thereby facilitating management without scratching the outer surface of the resin pulley 1. In addition, the burrs 5 can be removed efficiently and stably.

  Further, the resin pulley 1 is first rotated at a low speed, the burr 5 is roughly removed by the wire rope 4, and then the resin pulley 1 is rotated at a high speed to finely remove the burr 5. According to this, the burr 5 can be removed cleanly. Further, a stainless steel strand is used as the wire rope 4. According to this, the stainless steel stranded wire is strong without rusting, and is easy to obtain and inexpensive as a JIS standard product, so that the running cost can be suppressed.

  Further, a plurality of wire ropes 4 are stretched in parallel on the deburring tool 3, and a plurality of deburring portions are performed in parallel by the plurality of wire ropes 4. According to this, deburring can be efficiently performed and cycle time can be shortened.

  The resin pulley 1 has a groove 1a around the outer peripheral axis, and is pressed against the direction of the groove 1a with an angle in the tension direction of the wire rope 4. According to this, it is possible to efficiently deburr the bottom portion and both side slope portions of the groove 1a at a time, and the cycle time can be shortened. Also, when a convex groove is formed on the side of the concave groove 1a, the convex groove and the wire rope 4 intersect with each other by pressing with an angle. Even if it hits, the burr | flash 5 of the convex groove top part can be removed efficiently and stably.

  Further, the deburring tool 3 includes a wire rope 4 breakage detection switch 6. According to this, when a break of the wire rope 4 is detected by the break detection switch 6 during the automatic deburring operation, the automatic deburring operation is interrupted to give an alarm to the operator, or the spare deburring tool 3 is replaced. The automatic deburring operation can be continued from the portion where the cut is detected. As a result, no defective product is produced. The resin-molded rotating body is a resin pulley 1. According to this, the deburring method and the deburring apparatus are effective when applied to deburring of the resin pulley 1 having the V groove 1a on the outer periphery.

(Other embodiments)
In the above-described embodiment, both ends of the wire rope 4 are fixed in the deburring tool 3, but the present invention is not limited to this, and the wire rope is wound up sequentially from one to the other, You may update a contact part with a workpiece | work sequentially.

The schematic structure of the deburring apparatus in one Embodiment of this invention is shown, (a) is a deburring tool 3, (b) is a front view of the workpiece | work rotation apparatus 2. FIG. It is the A section enlarged view of the resin pulley 1 cross section shown in FIG.1 (b). It is a figure showing the relationship between the V groove 1a and the wire rope 4 in the process of deburring. The schematic structure of the deburring tool 3 in one Embodiment of this invention is shown, (a) is a side view, (b) is a front view.

Explanation of symbols

1. Resin pulley (resin molding rotating body)
1a ... V groove (groove)
2 ... Work rotating device (work rotating means)
3 ... Deburring tool 4 ... Wire rope (metal stranded wire)
5 ... Burr 6 ... Cut detection switch (cut detection means)

Claims (5)

The resin pulley (1) having a plurality of V-shaped grooves (1a) on the outer peripheral surface is rotated around the axis by the work rotating means (2), and a stranded wire (between two points of the deburring tool (3) ( 4) is pressed against the rotating resin pulley (1), and the metal stranded wire (4) is moved along the outer periphery of the resin pulley (1) to thereby move the V-shaped groove (1a) . In the deburring method of the resin pulley for removing the burr (5) generated by protruding to the outer surface ,
The metal strand (4) is inclined to the direction of the V-shaped groove (1a) by a predetermined angle, and the metal strand (4) is pressed against the V-shaped groove (1a). Bali take way method resin pulley according to claim. The pressing at the predetermined angle is performed by pressing the metal strand (4) to the bottom of the V-shaped groove (1a) of the resin pulley (1) and then 10-15 degrees of the metal strand. Bali take way method resin pulley according to claim 1, characterized in that angled shaking in the left and right opposite directions (4). Wherein as a line (4) of metal, burrs take Way Method resin pulley according to claim 1 or claim 2 characterized by using a stainless steel twisted wire. The deburring tool (3) is provided with a plurality of parallel strands (4) of the metal, and a plurality of deburring is performed in parallel with the plurality of strands (4) of the metal. Bali take way method resin pulley according to any one of claims 1 to 3,. Burr of the resin pulley according to any one of claims 1 to 4, wherein that you have provided a cut detecting means (6) of the deburring tool (3) to the line from the previous SL metal (4) take way method.

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