JP2013129010A - Chip removing tool and chip removing method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for favorably removing chips pinched in a narrow clearance of a workpiece.SOLUTION: A chip removing tool includes: a head part that can enter the inside the narrow clearance of the workpiece and is arranged toward a direction away from a pressing surface arranged on a tip and a bottom face of the narrow clearance, and an inclined groove that is inclined relative to a direction orthogonal to the bottom surface. The chip removing tool further includes a shaft part which removably supports the head part. The head part is formed into a cylindrical shape and is rotatably moved in the narrow clearance by the shaft part so that the chips are preferably collected in the inclined groove.

Description

  The present invention relates to a technique for removing chips caught in a narrow gap.

Conventionally, various methods for collecting chips generated by drilling, cutting, or the like on a workpiece have been proposed. For example, in Patent Document 1, while generating a rising air current in a casing surrounding a processing part to a workpiece and discharging chips, the flow output imparted to the chips by the rotation of the drilling tool, using diffusion energy, The structure of the chip collection | recovery apparatus which collect | recovers a chip | tip favorably by guide | inducing a chip in a casing is disclosed.
In addition to the technique of blowing a fluid such as air or coolant as in Patent Document 1, a technique of scraping off the chips using a brush, a spring, or the like is used.

JP 2009-297826 A

However, it is difficult to give a driving force enough to drop off and remove the chips sandwiched between the narrow portions only with the fluid jet power, and with brushes and springs, removal is not guaranteed because the chips move only in the gap. The problem remains. Even with these methods, the size of the chips themselves does not change, and the pinching force does not change. Therefore, even if the removal operation is repeated, it cannot be guaranteed that the chips can be reliably removed.
Then, this invention makes it a subject to provide the technique which can remove favorably the chip pinched | interposed into the narrow clearance gap of a workpiece | work.

  The chip removal jig according to the first aspect of the present invention is a jig for removing chips sandwiched in a narrow gap of a workpiece, and includes a head portion capable of entering into the narrow gap of the workpiece, the head portion Has a pressing surface provided at the tip, and an inclined groove provided in a direction away from the bottom surface of the narrow gap and inclined with respect to a direction perpendicular to the bottom surface.

  The shaft further includes a shaft that movably supports the head, and the head is formed in a cylindrical shape, and the head is rotated by the shaft in the narrow gap, thereby tilting the head. It is preferable to collect the chips in the groove.

  Chips collected in the inclined grooves of the head part by providing a coolant through in the interior from the shaft part to the head part, and ejecting the coolant into the internal space of the head part through the coolant through. Is preferably released to the outside.

  The chip removal method according to the second aspect of the present invention is a method for removing chips sandwiched in a narrow gap of a workpiece using the chip removal jig according to the first aspect of the present invention, wherein the pressing of the head portion The chip captures the chips in the inclined groove by dropping the chips sandwiched in the narrow gap, pressing the workpiece against the workpiece, and moving the head portion in the narrow gap. Collected chips are discharged to the outside.

  According to the present invention, it is possible to satisfactorily remove chips sandwiched between narrow gaps in the workpiece.

It is a figure which shows a chip removal jig | tool. It is a figure which shows an example of a workpiece | work. It is a figure which shows the removal process by a chip removal jig | tool. It is a figure which shows the example of application of a chip removal jig | tool. It is a figure which shows the other example of a workpiece | work. It is a figure which shows other embodiment of the chip removal jig | tool.

  As shown in FIG. 1, the chip removing jig 1 is an apparatus used for removing chips 4 sandwiched between narrow gaps 3 existing in a part of a work 2.

As shown in FIG. 2, the workpiece 2 is obtained by press-fitting a valve guide 7 into a valve guide relief shaving portion 6 of the cylinder head 5, for example.
A valve guide relief cutting portion 6 including a circular seat and relief cutting is provided from the state of the rough material of the cylinder head 5, and a hole for press fitting the valve guide 7 is machined, and the valve guide 7 is press fitted into the hole. By this series of operations, an annular narrow gap 3 is formed between the valve guide relief cutting portion 6 and the valve guide 7. Then, chips 4 such as chips and scraps generated when machining other parts of the cylinder head 5 are sandwiched in the narrow gap 3. The chip 4 in the narrow gap 3 is removed from the workpiece 2 using the chip removal jig 1.

  As shown in FIG. 1, the chip removing jig 1 is provided at the tip thereof, and enters the narrow gap 3 to remove the chips 4 and supports the head section 10 so as to be movable. A shaft portion 20 is provided.

The head unit 10 is provided at the tip of the chip removal jig 1. The head portion 10 is formed in a hollow cylindrical shape, and is formed so that the cylindrical portion has a thickness corresponding to the internal space of the narrow gap 3 of the workpiece 2. For example, the thickness of the wall surface of the head unit 10 is set to a thickness equal to or smaller than the gap width of the narrow gap 3.
In the present embodiment, the wall surface of the head portion 10 can enter the narrow gap 3, and the protruding portion of the valve guide 7 can be accommodated in the internal space of the cylindrical portion of the head portion 10.

The front end surface of the head unit 10 is formed as a pressing surface 11. The pressing surface 11 is formed as a flat surface and can come into contact with the bottom surface of the narrow gap 3. In the present embodiment, the pressing surface 11 of the head portion 10 is formed so as to be able to contact the seat surface of the valve guide relief shaving portion 6.
By pressing the pressing surface 11 of the head portion 10 against the chip 4 and pressing the chip 4, the chip 4 bitten into the narrow gap 3 is pulverized or compressed to reduce the chip 4. In this way, the chips 4 are pressed into the pressing surface 11 against the pinching force in the narrow gap 3, and thus fall off from the state of being pinched in the narrow gap 3 and crushed or compressed.

The head unit 10 has inclined grooves 12 on the wall surface.
The inclined groove 12 is a notch provided from the pressing surface 11 of the head portion 10 toward the base end side, and is provided so as to penetrate the cylindrical portion of the head portion 10 in the thickness direction. The inclined groove 12 is formed to be inclined with respect to the axial direction of the head portion 10 (the direction in which the head portion 10 enters perpendicularly to the bottom surface of the narrow gap 3). In other words, the inclined groove 12 is formed to be twisted clockwise or counterclockwise from the pressing surface 11 on the distal end side toward the proximal end side as viewed in the axial direction of the head portion 10.

  The size of the internal space of the inclined groove 12 is set so as to have a volume enough to accommodate the chips 4 inside. In addition, the axial length of the inclined groove 12 is set to be larger than the height of the portion (the protruding portion of the valve guide 7) accommodated in the internal space of the cylindrical portion of the head portion 10 of the workpiece 2. When the head portion 10 enters the narrow gap 3 of the workpiece 2, the opening on the base end side of the inclined groove 12 extends so as to reach the outside of the narrow gap 3. That is, when the head portion 10 is inserted into the narrow gap 3, the inclined groove 12 becomes a main path that communicates the inside and outside of the narrow gap 3.

The shaft portion 20 is provided continuously in the axial direction from the head portion 10. An appropriate rotation mechanism and movement mechanism are connected to the shaft portion 20, and the head portion 10 is supported by the rotation mechanism and movement mechanism so as to be able to rotate and move linearly in the axial direction. In addition, it may replace with a suitable rotation mechanism and a movement mechanism, and may perform the rotational movement and linear movement of the axial part 20 manually.
The shaft portion 20 is formed in a hollow cylindrical shape, and the internal space of the cylindrical portion is formed as a coolant through 21 communicating with the internal space of the cylindrical portion of the head portion 10. The coolant through 21 extends to the base end of the shaft portion 20, and the entire chip removal jig 1 is hollow by the coolant through 21.

  The coolant through 21 is connected to an appropriate coolant ejection device. When using the chip removal jig 1, the coolant is jetted toward the internal space of the head portion 10 through the coolant through 21 by operating the coolant jetting device. The coolant sprayed into the internal space of the head unit 10 is discharged to the outside through the narrow gap 3 and the inclined groove 12.

  Next, with reference to FIG. 3, the process of removing the chips 4 sandwiched between the narrow gaps 3 of the workpiece 2 using the chip removal jig 1 will be described.

First, the head portion 10 is moved into the narrow gap 3 and the pressing surface 11 is pressed against the chips 4 and pulverized. Thereby, the chips 4 are pushed into the bottom of the narrow gap 3. At this time, even if the chips 4 are fixed in the narrow gap 3, the chips 4 fall off due to pressing by the pressing surface 11, are pressed against the bottom, and are crushed or compressed.
In this manner, the chip portion 4 sandwiched in the gap is dropped and crushed and compressed by causing the head portion 10 corresponding to the opening of the narrow gap 3 to enter the narrow gap 3 and pressing the chips 4.

  Next, the shaft part 20 is rotated and the head part 10 is rotated. The chips 4 are collected in the inclined groove 12 by the rotational movement of the head unit 10. At this time, the chip 10 is rotated by rotating the head portion 10 along the inclination direction of the inclined groove 12 (the head portion 10 is rotated so that the distal end side of the inclined groove 12 is in front of the rotation direction with respect to the base end side). Can be guided well into the inclined groove 12.

After the chips 4 are collected by the inclined groove 12, the coolant is injected into the head portion 10 through the coolant through 21. As a result, the coolant pushes the chips 4 along the inclined grooves 12. In this way, the crushed chips 4 are discharged through the inclined grooves 12, and the chips 4 sandwiched between the narrow gaps 3 are removed.
In addition, it is also possible to discharge the chips 4 along the inclined grooves 12 using the centrifugal force generated by the rotation of the head unit 10 without spraying the coolant. It is also possible to remove the chips 4 from the narrow gap 3 by taking out the head part 10 from the gap in a state where the particles are collected.

  As described above, (1) the head portion 10 is moved into the narrow gap 3 and pressed to drop off the chips 4 in the gap and pulverize / compress. (2) The head portion 10 is turned, The chips 4 are collected by the inclined grooves 12 and (3) the chips 4 are discharged to the outside of the narrow gap 3 along the inclined grooves 12 by injecting the coolant through the coolant through 21. In this way, the chips 4 sandwiched between the narrow gaps 3 of the workpiece 2 are removed using the chip removal jig 1.

As shown in FIG. 4, chips 4 sandwiched between the narrow gaps 3 at the same time with respect to a work 30 having a plurality of narrow gaps 3,. It is also possible to perform the work of removing the.
The workpiece 30 is supported by a support device such as an articulated robot so as to be movable in the proximity direction and the separation direction with respect to the head portion 10 of each chip removal jig 1. For example, the workpiece 30 is a cylinder head in which eight workpieces 2 are arranged on a straight line with a predetermined interval. In other words, the narrow gaps 3, 3... Are linearly arranged on the work 30 at a predetermined interval.

The chip removal jigs 1, 1... Are connected and arranged along a straight line orthogonal to the axial direction thereof, and are supported so that each head portion 10 faces each narrow gap 3 of the work 30.
A rotation mechanism 40 is connected to each shaft portion 20. The rotation mechanism 40 includes a cylinder 41 and a rack and pinion 42 provided on each shaft portion 20. The forward / backward movement by the cylinder 41 and the rotation by each rack and pinion 42 are interlocked, and the forward / backward movement of the cylinder 41 is converted into a rotational movement by the rack and pinion 42.
A coolant injection device is connected to the coolant through 21 of each chip removing jig 1.

The process of removing the chips 4, 4... Sandwiched between the narrow gaps 3 of the workpiece 30 using the plurality of chip removal jigs 1.
First, the supporting device that supports the workpiece 30 is operated to move the workpiece 30 toward the chip removal jigs 1, 1. Further, the work 30 is moved until each head portion 10 enters each narrow gap 3. Next, the rotation mechanism 40 is operated to rotate and move each head unit 10 within the narrow gap 3. At the same time, the coolant injection device is operated, and the coolant is ejected into the head portion 10 via each coolant through 21. Thereby, the chip | tip 4 pinched | interposed into each narrow gap 3 of the workpiece | work 30 can be discharged | emitted outside.

  As described above, the same number of chip removal jigs 1, 1... Are prepared for the work 30 having a plurality of narrow gaps 3, 3. The workpiece 30 can be moved forward and backward with respect to the chip removing jigs 1, 1..., And each chip removing jig 1 can be rotated by the rotation mechanism 40. It is possible to simultaneously remove chips 4, 4... Sandwiched between the narrow gaps 3.

  As shown in FIG. 5, even when the narrow gap 51 of the workpiece 50 is linear, the chips 52 can be satisfactorily removed using the same technical idea as the above-described embodiment.

As shown in FIG. 6, the chip removing jig 60 includes a head portion 61 that can enter the narrow gap 51. The head portion 61 has a shape corresponding to the narrow gap 51 and has a size that can move within the narrow gap 51. That is, the head portion 61 is formed in a plate shape having a thickness equivalent to the gap width of the narrow gap 51, and its lateral width (width in the direction orthogonal to the gap width) is smaller than the lateral width of the narrow gap 51.
The head portion 61 has a pressing surface 62 and an inclined groove 63. The pressing surface 62 is a flat surface configured as a tip surface of the head unit 61. The inclined groove 63 is a notch penetrating in the thickness direction of the head portion 61, and is inclined with respect to the direction in which the head portion 61 enters (the direction perpendicular to the bottom surface of the narrow gap 51). In this case, the inclined groove 63 is preferably provided from the end of the head portion 61 toward the center. In other words, the inclined groove 63 is formed from the pressing surface 62 on the distal end side of the head portion 61 toward the proximal end side, and goes toward the center side in the direction orthogonal to the axial direction from the distal end side toward the proximal end side. It is inclined to.

The chip removal jig 60 configured as described above enters the narrow gap 51 of the workpiece 50 to drop the chip 52 from the state where the chip 52 is sandwiched by the pressing surface 62 and is pressed into the workpiece 50 to be crushed or compressed. Furthermore, the chips 52 are collected by the inclined grooves 63 by moving the head portion 60 along the narrow gap 51. In this case, by moving the head portion 61 so that the distal end side of the inclined groove 63 is on the front side in the movement direction with respect to the proximal end side, the chips 52 can be scooped out and can be favorably guided into the inclined groove 63.
Then, the chips 52 trapped in the narrow gap 51 of the workpiece 50 are removed by taking out the chips 52 collected in the inclined groove 63.

  Note that the shape of the narrow gap of the workpiece is not limited to an annular shape or a straight shape, but also in the case of a semicircular shape, a curved shape, etc. Chips sandwiched can be removed well.

  1: chip removal jig, 2: workpiece, 3: narrow gap, 4: chip, 10: head part, 11: pressing surface, 12: inclined groove, 20: shaft part, 21: coolant through

Claims (4)

It is a jig to remove chips caught in a narrow gap between workpieces,
Comprising a head portion capable of entering the narrow gap of the workpiece,
The head portion includes a pressing surface provided at a tip, and an inclined groove provided in a direction away from the bottom surface of the narrow gap and inclined with respect to a direction perpendicular to the bottom surface. A chip removal jig. A shaft portion that movably supports the head portion;
2. The chip removal according to claim 1, wherein the head part is formed in a cylindrical shape, and the chips are collected in the inclined groove by rotating the head part within the narrow gap by the shaft part. jig. From the shaft part to the head part, a coolant through is provided therein,
The chip removal jig according to claim 2, wherein the chips collected in the inclined grooves of the head part are discharged to the outside by spraying the coolant into the internal space of the head part through the coolant through. Using the chip removal jig according to any one of claims 1 to 3, a method of removing chips sandwiched in a narrow gap of the workpiece,
With the pressing surface of the head part, the chips sandwiched in the narrow gap are dropped off and pressed against the workpiece,
By moving the head part within a narrow gap, the chips are collected in the inclined groove,
A chip removing method for discharging chips collected in the inclined groove to the outside.

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