JPWO2018180834A1 - Hand held deburring machine - Google Patents

Abstract

An object of the present invention is to provide a hand-held deburring machine for carrying out deburring work by hand. The hand-held deburring machine (10) is connected to a polishing brush (12) having a plurality of polishing wires (12a) extending rearward from a front end to move the polishing brush (12) in the front-rear direction. A main body (18), which can be held by a worker and provided with a motor (14) that is driven to rotate about an extending axis (X), and a cylindrical shape attached so as to surround the front end portion of the polishing wire (12a). A front end member (20), which is attached to the cylindrical front end member (20), extends rearward and is supported by the main body (18) so as to be displaceable in the front-rear direction, thereby polishing the cylindrical front end member (20) with the polishing brush (12). And a guide member (22) that can be displaced rearward along the axis, and pushes the polishing brush (12) forward from the cylindrical front end member (20) to rotate, thereby performing deburring work by the polishing brush (12). Cormorant. [Selection diagram] Fig. 1

Description

  The present invention relates to a hand-held deburring machine suitable for polishing a workpiece surface, in particular, removing burrs on the surface of a processing hole provided in the workpiece.

  For example, when a processing hole intersecting a workpiece is provided, burrs are likely to occur at an opening edge where a processing hole formed later intersects a processing hole formed earlier. As an apparatus for removing such burrs, a device in which a large number of polishing wires are bundled to form a polishing brush is inserted into the processing hole while being rotationally driven around a longitudinal axis of the polishing brush by a motor. Is known to remove burrs by using the method (Patent Documents 1 and 2).

Japanese Utility Model Publication No. 5-86455 JP 2003-236738 A

  The present invention is a deburring machine using a polishing brush in which a large number of polishing wires are bundled as described above, and is a hand-held deburring machine that enables an operator to easily carry out deburring work by hand. It is intended to provide a picking machine.

That is, the present invention
A body that is connected to a polishing brush having a plurality of polishing wires extending rearward from a front end and includes a motor that rotationally drives the polishing brush about an axis extending in the front-rear direction, and a main body that can be held by a worker,
A cylindrical front end member attached so as to surround the front end portion of the polishing wire;
A guide member that is attached to the tubular front end member, extends rearward, and is supported by the main body so as to be displaceable in the front-rear direction, so that the cylindrical front end member can be displaced rearward along the polishing brush;
Has,
Provided is a hand-held type deburring machine in which the polishing brush is pushed forward from the cylindrical front end member and rotated to perform a deburring operation by the polishing brush.

  In this hand-held deburring machine, an operator holds a main body by hand, aligns a cylindrical front end member with an opening of a processing hole provided in a workpiece, abuts the main body, and pushes the main body toward the processing hole. Thus, the polishing brush can be advanced from the cylindrical front end member into the processing hole. Therefore, the polishing wire rod of the polishing brush advanced into the processing hole is opened radially outward by centrifugal force by being rotationally driven by the motor, and the inner surface of the processing hole can be polished to remove burrs in the processing hole. . As described above, with this hand-held deburring machine, the operator can easily carry out deburring in the processing hole of the workpiece by holding the deburring machine by hand. Further, since the periphery of the front end portion of the polishing wire is surrounded by the cylindrical front end member, even if the polishing brush is rotated in a state where the polishing brush is not advanced forward from the cylindrical front end member, the polishing wire is not removed. It can be kept safe without spreading.

  Specifically, the cylindrical front end member and the processing hole are inserted so that the cylindrical front end member can be partially inserted into the opening of the processing hole provided in the workpiece so as to be able to engage with the edge of the opening. Can be easily adjusted.

  Further, the cylindrical front end member may have an engaging portion that engages with a surface surrounding the processing hole of the workpiece when polishing the processing hole provided in the workpiece. This makes it possible to more stably support the hand-held deburring machine during the polishing operation.

  Further, the main body may be provided with a pistol grip-shaped grip portion that can grip the main body with the polishing brush facing forward. Since the work can be performed with the pistol grip-shaped grip portion, the work can be performed while looking at the processing hole to be worked, and the main body can be easily moved back and forth.

  Further, the guide member may have a retraction stopper, and when the guide member retreats by a predetermined distance, the retraction stopper may engage with the main body to stop the retraction of the guide member. By doing so, the distance by which the polishing brush is advanced can be limited according to the deburring position in the processing hole.

  Further, an urging member may be provided so as to urge the guide member forward with respect to the main body so that the tubular front end member is located at a position surrounding the front end portion of the polishing wire. it can. Thus, it is possible to always return to the initial state when the polishing brush is pulled out from the processing hole.

  Further, a rotation stopper for preventing the rotation of the motor when the cylindrical front end member is located at a position surrounding the front end portion of the polishing wire rod may be provided. Thereby, the motor can be prevented from rotating in a state where the polishing brush cannot be advanced from the cylindrical front end member into the processing hole, and safety can be improved.

  The motor is a pneumatic motor having a rotating shaft axially aligned and coupled with the polishing brush, the rotating stopper engaging a rearward portion of the rotating shaft extending rearward from the motor to engage the rotating shaft. The rotation of the rotating shaft can be prevented.

  Specifically, the rotation stopper may be attached to the guide member, and the guide member may be moved rearward relative to the main body so as to move away from a rear portion of the rotation shaft. Thus, when the polishing brush is moved forward from the cylindrical front end member supported by the guide member, the polishing brush can be driven to rotate.

The guide member includes a front end support member for supporting the tubular front end member, and at least two guide members extending rearward from the front end support member in parallel with the plurality of polishing wires and slidably supported in the body in the front-rear direction. With two mutually spaced guide rods.
With this configuration, the cylindrical front end member can be supported at three points with respect to the main body, and the cylindrical front end member can be stably moved in the front-rear direction.

The front end support member may have a substantially triangular shape having a portion supporting the cylindrical front end member as one vertex, and the guide rods may extend rearward from portions adjacent to the other vertex. it can.
By making the front end support member substantially triangular, when a processing hole requiring deburring is at a corner (corner) limited by the corner wall of the workpiece, it can be easily advanced into the same corner. To make things possible.

  Hereinafter, an embodiment of a hand-held deburring machine according to the present invention will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is the front-back direction longitudinal cross-sectional view of the hand-held deburring machine which concerns on this invention, and the grip part is a schematic diagram which shows the basic structure. FIG. 2 is a longitudinal sectional view showing a main part of the hand-held deburring machine of FIG. 1, showing a state in which a polishing brush is projected forward. FIG. 2 is a front view of a cylindrical front end member surrounding a front end portion of a polishing brush and a front end support member supporting the same in the hand-held deburring machine of FIG. 1; Sectional drawing which shows the cylindrical front end member in the state which matched and engaged with the processing hole when performing deburring in the processing hole provided in the workpiece using the handheld deburring machine of FIG. It is. It is sectional drawing which shows the cylindrical front end member suitable for performing deburring when the intersection position of a processing hole is close to the surface of a workpiece. It is sectional drawing which shows the cylindrical front end member suitable when the distance from the surface of a workpiece to the processing hole which is going to remove deburr is long. FIG. 5 is a cross-sectional view of a tubular front end member suitable for stable engagement with a workpiece. It is sectional drawing of the cylindrical front end member suitable for deburring in the processing hole provided in the cylindrical workpiece. FIG. 5 is a cross-sectional view of a tubular front end member suitable for stably engaging a flat surface of a workpiece. FIG. 10 is a cross-sectional view of a tubular front end member similar to FIG. 9 but having a short tubular portion inserted into a machined hole.

  As shown in FIG. 1, a hand-held deburring machine 10 according to the present invention includes a polishing brush 12, a main body 18 having a pistol grip-type holding portion 18 a that can be held by an operator, and a front end portion of the polishing brush 12. And a guide member 22 attached to the cylindrical front end member 20 and extending rearward and supported by the main body 18. The polishing brush 12 is formed by bundling a large number of polishing wires 12a extending rearward from a front end into an elongated cylindrical shape. The main body 18 includes a motor 14, and the motor 14 is connected to a rear end of the polishing brush 12, and drives the polishing brush 12 to rotate about an axis X extending in the front-rear direction. The guide member 22 is supported by the main body 18 so as to be displaceable in the front-rear direction, so that the cylindrical front end member 20 attached to the guide member 22 can be displaced rearward along the polishing brush 12 as shown in FIG. .

  In the illustrated example, the polishing brush 12 includes a cylindrical binding member 12b that bundles the rear ends of a number of the polishing wires 12a to form the polishing wires 12a as a whole in a columnar shape, and a coupling brush that extends rearward from the binding members 12b. The connecting rod 12c is fixed by inserting a rear end of the connecting rod 12c into a cylindrical front extension 14b of a rotating shaft 14a of the motor 14. As the polishing brush 12, for example, a deburring brush made of ceramic fiber manufactured by Xebec Co., Ltd. can be used. The motor 14 is a turbine motor driven by compressed air introduced through the compressed air receiving pipe 24 when the user grips the grip portion 18a with one hand and pushes the trigger 24a. The compressed air can be supplied to the motor 14 by switching the flow path of the valve member 24b by a knob (not shown) so that the motor 14 can be switched between normal rotation and reverse rotation. It is intended to make it easier to remove burrs that have fallen by rotating in one direction by rotating in the opposite direction. Further, the valve member 24b also functions as a flow control valve for the compressed air, and by adjusting the flow rate, the rotation speed of the motor 14 can be adjusted, whereby the polishing force of the polishing brush 12 can be adjusted. ing.

  The guide member 22 is fixed to the front end support member 22a for fixedly supporting the cylindrical front end member 20, and extends rearward while being fixed to the front end support member 22a. And three mutually spaced guide rods 22b (as described in). As shown in FIG. 3, the front end supporting member 22a has a substantially triangular shape having a portion supporting the cylindrical front end member 20 as one vertex, and the two guide rods 22b extend rearward from a portion adjacent to the other vertex. The other extends rearward from an intermediate position between these two guide rods 22b. A stopper 22c is fixed to the guide rod 22b at the intermediate position so that the position can be adjusted. When the guide rod 22b is displaced backward by a predetermined distance with respect to the main body 18 as shown in FIG. To prevent displacement (retreat) of the guide rod 22b (and thus of the cylindrical front end member 20).

  The three guide rods 22b extend further rearward from the main body 18, and a motor stopper 26, which is axially aligned with the rotating shaft 14a of the motor 14, is fixed to the rear end. 2, the motor stopper 26 includes a stopper support member 26a fixed to the rear end of the guide rod 22b, a position adjustment screw 26b screwed to the stopper support member 26a, and a position adjustment screw. 26b, and a stopper body 26d fixed to the tip of 26b. The stopper body 26d is provided with a stopper portion 26c made of urethane or the like that receives the rear end of the rotation shaft 14a of the motor 14 and prevents the rotation of the rotation shaft 14a. When the cylindrical front end member 20 is located around the front end of the polishing brush 12 as shown in FIG. 1, the stopper portion 26c receives the rear end of the rotating shaft 14a and prevents its rotation. When the guide member 22 moves rearward with respect to the main body 18 so that the cylindrical front end member 20 moves relatively rearward from the front end portion of the polishing brush 12 in order to perform the deburring operation, the stopper portion 26c rotates the rotating shaft. The rotation of the rotation shaft 14a is allowed to separate from the rear end of the rotation shaft 14a. The position adjusting screw 26b can adjust the axial position of the stopper main body 26d by screwing it. A compression coil spring 22d is provided between the main body 18 and the front end support member 22a around two guide rods 22b on both sides of the guide rod 22b to which the stopper 22c is fixed, and the cylindrical front end member 20 is polished. The front end support member 22a is urged to be at a position around the front end of the brush 12. Although not shown, the guide rod 22b is scaled along its length so that the amount of retreat of the guide member 22 with respect to the polishing brush 12 (therefore, the distance the polishing brush 12 has advanced into the processing hole) can be determined. Is preferred.

  When the hand-held deburring machine 10 is used, as shown in FIG. 4, the tapered surface 20a of the cylindrical front end member 20 at the front end position of the polishing brush 12 is opened with a processing hole h for deburring the workpiece W. The cylindrical front end member 20 is aligned with the processing hole h by engaging with the edge. If the main body 18 is advanced toward the workpiece W while rotating and driving the polishing brush 12 in this state, the polishing brush 12 advances into the processing hole h, and the polishing wire 12a is opened radially outward by centrifugal force to perform processing. The inner peripheral surface of the hole h is polished to remove burrs generated on the inner peripheral surface. As shown in the figure, when the processing hole h1 is made to intersect the processing hole h later, burrs may be generated toward the processing hole h along the crossing edge of the holes. Such burrs can be removed by polishing the inner peripheral surface of the processing hole h as described above. When the polishing wire 12a is shortened by use, the cylindrical front end member 20 is located at a position forward of the front end of the polishing wire 12a. In this case, the position adjusting screw 26b is rotated to move the polishing rod 12b to the guide rod 22b. The position of the cylindrical front end member 20 is adjusted rearward when the stopper portion 26c of the motor stopper 26 receives the rear end of the rotating shaft 14a to prevent rotation of the rotating shaft 14a. Position around the front end of the The cylindrical front end member 20 is exchangeable with respect to the front end support member 22a according to the hole diameter of the processing hole h, and the polishing brush 12 is also exchangeable with the cylindrical front extension portion 14b. I have.

  FIG. 5 shows a modified example of the cylindrical front end member 20 suitable for removing a burr generated at a crossing portion of a processing hole h1 intersecting the processing hole h near the surface of the workpiece. That is, in the cylindrical front end member 20, the radius of the front part of the hole 20b through which the polishing brush 12 passes is gradually increased toward the front, and the radius immediately after the polishing wire 12a enters the processing hole h. Easy to open in the direction. The cylindrical front end member 20 is not provided with the tapered surface 20a unlike the cylindrical front end member 20 shown in FIG.

  FIG. 6 shows an example of a cylindrical front end member 20 suitable for a case where a large-diameter hole h2 is provided on the surface side of a workpiece W of a processing hole h for deburring. The cylindrical front end member 20 has an elongated shape to engage the tapered surface 20a of the cylindrical front end member 20 with the opening edge of the processing hole h located at a deep position.

  FIG. 7 shows an example in which a cylindrical portion 20c extending forward of the tapered surface 20a is provided to stably engage the cylindrical front end member 20 with the processing hole h.

  FIG. 8 shows a modified example of the cylindrical front end member 20 suitable when the workpiece W is cylindrical and the hole h3 extending in the longitudinal direction at the center thereof is formed to intersect the processing hole h extending in the diametric direction. The front end surface 20d of the cylindrical front end member 20 is a concave surface having a curvature corresponding to the outer surface of the cylindrical workpiece W.

  FIG. 9 shows an example in which an annular flange 20e is provided instead of the tapered surface 20a, and the tubular front end member 20 is stably engaged with the workpiece W. FIG. 10 shows a structure provided with a short cylindrical portion 20f that enters the machining hole h together with a similar flange 20e. The cylindrical front end member 20 can be easily aligned with the processing hole h by the cylindrical portion 20f, and the cylindrical front end member 20 in operation can be further stabilized by the flange 20e.

  Although the embodiment of the hand-held deburring machine according to the present invention has been described above, the present invention is not limited to this. For example, the front end support member 22a shown in FIG. 3 has a substantially triangular shape. This is because the processing hole h that requires deburring is located at a corner (corner) limited by the corner wall of the workpiece W. , So that the front end support member 22a can be easily advanced into the same corner, and can have a required shape other than a triangle. The motor is not limited to a pneumatic motor but may be an electric motor. In addition, the hand-held deburring machine according to the present invention is suitable for deburring in a processing hole, but can also be used for polishing the surface of the processing hole.

Machining hole h;
Workpiece W;
Axis X;
Hand held deburring machine 10;
Polishing brush 12;
Polishing wire 12a;
Tubular binding member 12b;
Connecting rod 12c;
Motor 14;
Rotating shaft 14a;
Tubular front extension 14b;
Body 18;
Grip portion 18a;
Support hole 18b;
Tubular front end member 20;
Tapered surface 20a;
Hole 20b;
Tubular portion 20c;
Front end face 20d;
Flange 20e;
Cylindrical portion 20f;
Guide member 22;
Front end support member 22a;
Guide rod 22b;
Stopper 22c (retraction stopper);
Compression coil spring 22d (biasing member);
Compressed air receiving pipe 24;
Trigger 24a;
Valve member 24b;
Motor stopper 26 (rotation stopper);
Stopper support member 26a;
Position adjustment screw 26b;
Stopper portion 26c;
Stopper body 26d

Claims (11)

A body that is connected to a polishing brush having a plurality of polishing wires extending rearward from a front end and includes a motor that rotationally drives the polishing brush about an axis extending in the front-rear direction, and a main body that can be held by a worker,
A cylindrical front end member attached so as to surround the front end portion of the polishing wire;
A guide member that is attached to the tubular front end member, extends rearward, and is supported by the main body so as to be displaceable in the front-rear direction, so that the cylindrical front end member can be displaced rearward along the polishing brush;
Has,
A hand-held deburring machine for performing a deburring operation by the polishing brush by pushing the polishing brush forward from the cylindrical front end member and rotating the polishing brush.   2. The hand-held deburring machine according to claim 1, wherein the cylindrical front end member is partially inserted into an opening of a processing hole provided in the workpiece so as to be engageable with an edge of the opening.   3. The cylindrical front end member according to claim 1, wherein the cylindrical front end member has an engaging portion which engages with a surface surrounding the processing hole of the workpiece when polishing the processing hole provided in the workpiece. Hand-held deburring machine as described.   The hand-held deburring machine according to any one of claims 1 to 3, wherein the main body has a pistol grip-shaped grip portion that can grip the main body with the polishing brush facing forward.   5. The guide member according to claim 1, wherein the guide member has a retraction stopper, and when the guide member retreats, the retraction stopper engages with the main body to stop the retraction of the guide member. A hand-held deburring machine as described in.   6. An urging member for urging the guide member forward with respect to the main body so that the tubular front end member is located at a position surrounding the front end portion of the polishing wire. A hand-held deburring machine according to claim 1.   The hand-held deburring according to any one of claims 1 to 6, further comprising a rotation stopper for preventing rotation of the motor when the cylindrical front end member is located at a position surrounding the front end portion of the polishing wire. Machine.   The motor is a pneumatic motor having a rotating shaft axially aligned and coupled with the polishing brush, the rotating stopper engaging a rear portion of the rotating shaft extending rearward from the motor. The hand-held deburring machine according to claim 7, wherein the rotation of the rotating shaft is prevented.   9. The hand-held device according to claim 8, wherein the rotation stopper is attached to the guide member, and the guide member is moved rearward relative to the main body so as to be separated from a rear portion of the rotation shaft. Type deburring machine.   The guide member includes a front end support member for supporting the tubular front end member, and at least two guide members extending rearward from the front end support member in parallel with the plurality of polishing wires and slidably supported in the body in the front-rear direction. A hand-held deburring machine according to any of the preceding claims, comprising two mutually spaced guide rods. 11. The front end supporting member according to claim 10, wherein the front end supporting member has a substantially triangular shape having a portion supporting the cylindrical front end member as one vertex, and the guide rod extends rearward from a portion adjacent to another vertex. Hand-held deburring machine as described.

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