TWI708659B - Hand-held burr removing machine - Google Patents

Abstract

[Problem] 　　 The subject of the present invention is to provide a hand-held burr removing machine that can easily perform burr removing operations by holding it with the hand. [Solution] 　　 The handheld burr remover (10) has: a main body (18); a cylindrical front end member (20); and a guide member (22). The main body (18) can be held by the operator and has A motor (14), the motor (14) is connected to the grinding brush (12), and the grinding brush (12) is driven to rotate around an axis (X) extending in the front-rear direction, and the grinding brush (12) has A plurality of polishing wires (12a) whose front ends extend backward; the cylindrical front end member (20) is installed to surround the front end of the polishing wires (12a); the guide member (22) is installed on the cylindrical The front end member (20) extends toward the rear, and is supported by the main body (18) in a manner displaceable in the front and rear direction, so that the cylindrical front end member (20) can be displaced toward the rear along the abrasive brush (12) , And by pushing the polishing brush (12) forward from the cylindrical front end member (20) and rotating it, the burr removal operation using the polishing brush (12) is performed.

Description

Hand-held burr removing machine

The present invention relates to a hand-held burr removing machine, which is suitable for grinding the surface of a workpiece, particularly suitable for removing burrs on the surface of a machining hole of the workpiece.

For example, when a machining hole that crosses the workpiece is provided, it is easy to produce burrs on the machining hole formed later and the opening edge that intersects the machining hole formed before. As a device for removing such burrs, it is well-known that a plurality of polishing wires are bundled together to form a polishing brush, and the polishing brush is rotated and driven with its longitudinal axis as the center while inserting it into In this machined hole, the burr removal operation is performed (Patent Documents 1 and 2). [Prior Art Document] [Patent Document]

[Patent Document 1] Japanese Unexamined Publication No. 5-86455 　　 [Patent Document 2] Japanese Unexamined Publication No. 2003-236738

[The problem to be solved by the invention]

The object of the present invention is to provide a hand-held burr removing machine that uses a polishing brush that bundles a large number of polishing wires as described above, which can be held by the operator and can easily perform burr removal operations Burr removal machine. [Means to solve the problem]

That is, the hand-held burr removing machine provided by the present invention has: 　　 body, the system can be held by the operator, and equipped with a motor, the motor is connected to the abrasive brush, and the abrasive brush extends in the front and rear direction The axis is driven to rotate as a center, and the polishing brush has: a plurality of polishing wires extending from the front end toward the rear; a cylindrical front end member installed to surround the front end portion of the polishing wire; and A guide member which is installed on the cylindrical front end member and extends toward the rear, and is supported by the main body in a manner displaceable in the front-rear direction, so that the cylindrical front end member can follow the abrasive brush, Shifting to the rear, 　　 uses the cylindrical front end member to push the polishing brush forward and rotate it to perform the burr removal operation using the polishing brush.

This hand-held burr remover is designed by the operator to hold the main body by hand to integrate and contact the cylindrical front end member with the opening of the machining hole provided in the workpiece. By pressing the main body against the machining hole, the abrasive brush can be made Enter the processing hole from the cylindrical front end member. Therefore, the polishing wire of the polishing brush that enters the processing hole is driven by the rotation of the motor and opens toward the outside in the radial direction by centrifugal force to grind the inner surface of the processing hole and remove the burrs in the processing hole. In this way, with such a hand-held burr removing machine, the operator can easily perform the burr removal operation in the machining hole of the workpiece by holding the burr removing machine by hand. In addition, the periphery of the front end of the polishing wire is surrounded by the cylindrical front end member. Therefore, even if the polishing brush is rotationally driven, the polishing wire does not move forward from the cylindrical front end member. Will expand and ensure safety.

Specifically, the cylindrical front end member is partially inserted into the opening of the processing hole provided in the workpiece, and can be engaged with the edge of the opening, so that the cylindrical front end member and the processing hole can be easily integrated.

Furthermore, the cylindrical front end member may have an engaging portion that engages with the surface surrounding the processed hole of the workpiece when the processed hole provided in the workpiece is polished. In this way, the hand-held burr remover can be supported more stably during the polishing operation.

In addition, this system may include a handle-shaped grip that can hold the main body in a state where the abrasive brush is directed forward. Since the handle-shaped grip part can be held for work, the work can be performed while looking at the processing hole of the work object, so the front and back movement of the main body can be easier.

In addition, the guide member has a retreat stop portion, and when the guide member retreats only a predetermined distance, the retreat stop portion is engaged with the body to stop the guide member from retreating. In this way, it is possible to limit the distance of advancing the abrasive brush in accordance with the position of the burr removal in the processing hole.

Furthermore, there may be an elastic pushing member that pushes the guide member toward the front relative to the main body, so that the cylindrical front end member becomes a position surrounding the front end portion of the polishing wire. With this, when the abrasive brush is pulled out from the processing hole, it can be restored to its normal initial state.

The present invention further has a rotation stopper which prevents the rotation of the motor when the cylindrical front end member is located around the front end portion of the polishing wire. With this, in a state where the abrasive brush cannot enter the processing hole from the cylindrical front end member, the motor is not rotated, which can improve safety.

The motor is a pneumatic motor and has a rotating shaft integrally connected with the grinding brush in the axial direction, and the rotation stopper is engaged with the rear part of the rotating shaft extending from the motor toward the rear to prevent the The rotation of the rotation axis.

Specifically, the rotation stopper is installed on the guide member, and the guide member can be separated from the rear part of the rotation shaft by moving the guide member relatively backward with respect to the main body. With this, when the polishing brush is moved forward from the cylindrical front end member supported by the guide member, the polishing brush can be rotationally driven.

The guide member system may have: a front end support member that supports the cylindrical front end member; and at least two guide rods spaced apart from each other, and the guide rods are parallel to the plurality of polishing wires from the front end support member It extends to the rear and is supported by the body so as to be slidable in the front-rear direction.　　By doing this, the cylindrical front end member can be supported at three points relative to the main body, and the cylindrical front end member can be stabilized and moved in the front-rear direction.

The front end support member may have a substantially triangular shape with a portion supporting the cylindrical front end member as an apex, and the guide rods may extend rearward from portions adjacent to other apexes.　　 By making the front end support member a slightly triangular shape, when the machining hole necessary to remove the burr is located in the corner (corner) restricted by the corner wall of the workpiece, it can easily enter the same corner.

Hereinafter, the embodiment of the hand-held burr removing machine of the present invention will be described based on the drawings.

As shown in Fig. 1, the hand-held burr removing machine 10 of the present invention has: a grinding brush 12; a body 18 having a handle-type grip 18a that can be held by an operator; a cylindrical front end member 20, The cylindrical front end member 20 is installed so as to surround the periphery of the front end portion of the polishing brush 12; and a guide member 22 is installed on the cylindrical front end member 20 and extends backward and is supported by the main body 18. The polishing brush 12 is formed by bundling a large number of polishing wires 12a extending from the front end to the rear to form an elongated cylindrical shape. The main body 18 has a motor 14 which is connected to the rear end of the polishing brush 12 and drives the polishing brush 12 to rotate around 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-to-rear direction. The cylindrical front end member 20 mounted on the guide member 22 is displaceable toward the rear along the abrasive brush 12 as shown in FIG. .

In the example of the figure, the polishing brush 12 has: a cylindrical binding member 12b, which bundles the rear ends of a plurality of polishing wires 12a so that the entire polishing wire 12a forms a cylinder And a connecting rod 12c extending backward from the binding member 12b, the rear end of the connecting rod 12c is inserted into and fixed to the cylindrical front extension 14b of the rotating shaft 14a of the motor 14. As the polishing brush 12, for example, a brush for burr removal made of ceramic fiber (Ceramic Fiber) of Japan GEEBEC company can be used. The motor 14 is a turbo motor driven by compressed air. The compressed air is introduced through the compressed air receiving tube 24 by the user holding the grip 18 a with one hand, pressing down the trigger 24 a. The compressed air can be switched by a switch not shown in the figure, and the valve member 24b of the supply direction to the motor 14 can be changed. In this way, the forward and reverse rotation of the motor 14 can be switched. Because it rotates in a single direction, the burrs that have been dumped can be easily removed by rotating in the opposite direction. In addition, the valve member 24b can also be used as a flow adjustment valve for compressed air, and the number of revolutions of the motor 14 can be adjusted by adjusting the flow, so that the grinding force by the grinding brush 12 can be adjusted.

The guide member 22 has: a front end support member 22a, which fixedly supports the cylindrical front end member 20; and three guide rods 22b that are spaced apart from each other. The guide rods 22b are fixed to the front end support member 22a and face rearward. It extends and is slidably inserted into the supporting hole 18b of the main body 18 (described below) in the front-rear direction. As shown in FIG. 3, the front end support member 22a has a substantially triangular shape, and the substantially triangular shape has a portion supporting the cylindrical front end member 20 as a vertex, and two guide rods 22b extend rearward from portions adjacent to the other vertex. The other guide rod extends backward from the middle position of the two guide rods 22b. The stopper 22c is a guide rod 22b fixed in an intermediate position in an adjustable position. As shown in FIG. 2, when the guide rod 22b is displaced only a predetermined distance toward the rear relative to the main body 18, the stopper 22c It engages with the main body 18, and prevents the guide rod 22b (that is, the cylindrical front end member 20) from being displaced (retreated).

The three guide rods 22b extend further from the main body 18 toward the rear, and a motor stopper 26 is fixed at the rear end thereof, and the motor stopper 26 is integrated with the rotation shaft 14a of the motor 14 in the axial direction. The motor stopper 26 is shown in FIG. 2 and has: 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 The stopper body 26d at the front end of 26b. The stopper body 26d is provided with a stopper portion 26c made of urethane or the like. The stopper portion 26c receives the rear end of the rotating shaft 14a of the motor 14 and prevents the rotating shaft 14a from rotating. As shown in FIG. 1, the cylindrical front end member 20 is positioned around the front end of the polishing brush 12, and the stopper portion 26c receives the rear end of the rotating shaft 14a and prevents the rotating shaft 14a from rotating. In addition, in order to perform the burr removal operation, when the guide member 22 is moved rearward with respect to the main body 18 so that the cylindrical front end member 20 relatively moves rearward from the front end of the polishing brush 12, the stopper portion 26c It is separated from the rear end of the rotating shaft 14a, allowing the rotating shaft 14a to rotate. The position of the stopper body 26d in the axial direction can be adjusted by the screw position adjustment screw 26b. Around the two guide rods 22b, between the main body 18 and the front end support member 22a, there is a compression coil spring 22d. The two guide rods 22b are located on both sides of the guide rod 22b to which the stopper 22c is fixed. , The front end support member 22a is elastically pushed so that the cylindrical front end member 20 becomes a position around the front end of the polishing brush 12. Although not shown, it is better to provide a scale along the longitudinal direction of the guide rod 22b. This allows the guide member 22 to retract relative to the grinding brush 12 (that is, the distance that the grinding brush 12 advances into the processing hole) more clearly.

When the hand-held burr removing machine 10 is used, as shown in FIG. 4, the tip surface 20a of the cylindrical tip member 20 positioned at the front end of the polishing brush 12 is engaged with the machining hole for removing the burr of the workpiece W The opening edge of h integrates the cylindrical tip member 20 into the processing hole h. In this state, the main body 18 is advanced toward the workpiece W while rotating the grinding brush 12, the grinding brush 12 will advance into the processing hole h, and the grinding wire 12a is opened toward the outside in the radial direction by centrifugal force, and it can be ground. The inner peripheral surface of the hole h is processed to remove burrs on the inner peripheral surface. As shown in the figure, when the machined hole h1 is formed like a cross with the machined hole h later, it will produce burrs toward the machined hole h along the intersection edge of these holes, but as described above , By grinding the inner peripheral surface of the hole h, such burrs can be removed. When the polishing wire 12a becomes shorter due to use, the cylindrical tip member 20 will be positioned forward of the front end of the polishing wire 12a. At this time, the position adjustment screw 26b is rotated relative to the guide rod 22b When the stopper portion 26c of the motor stopper 26 receives the rear end of the rotating shaft 14a and becomes a position that prevents the rotation of the rotating shaft 14a, the cylindrical front end member 20 will become in the rear position. The position around the front end of the polishing wire 12a. The cylindrical front end member 20 is adapted to the hole diameter of the processing hole h, and the front end support member 22a can be freely replaced, and the polishing brush 12 can be freely replaced in the cylindrical front extension 14b in the same manner.

FIG. 5 shows a modification of the cylindrical front end member 20. The cylindrical front end member 20 is suitable for removing burrs generated at the machining hole h1 intersecting the machining hole h and near the intersection of the workpiece surface. That is, in the cylindrical front end member 20, the radius of the front portion of the hole 20b passing through the polishing brush 12 gradually increases as it goes forward, so that the polishing wire 12a enters the processing hole h from a point , It can be easily opened towards the radius. In this cylindrical tip member 20, the tip surface 20a like the cylindrical tip member 20 shown in FIG. 4 is not provided.

Fig. 6 shows an embodiment of the cylindrical front end member 20, which is suitable for the case where a large diameter hole h2 is provided on the surface side of the workpiece W of the processed hole h for burr removal. The cylindrical front end member 20 is elongated in order to engage the front end tip surface 20a of the cylindrical front end member 20 with the opening edge of the processing hole h located in the deep position.

Fig. 7 shows an embodiment provided with a cylindrical portion 20c, which extends toward the front of the tip surface 20a in order to allow the cylindrical tip member 20 to be more stably engaged with the processing hole h.

Fig. 8 shows a modified example of the cylindrical front end member 20. The cylindrical front end member 20 is suitable for use when the workpiece W is cylindrical and has a hole h3 extending in the longitudinal direction and intersecting a machining hole h extending in the diameter direction. Generally to form the center of the situation. The front end surface 20d of the cylindrical front end member 20 is a concave surface, and the curvature of the concave surface corresponds to the outer surface of the cylindrical workpiece W.

FIG. 9 shows an embodiment in which an annular flange 20e is provided instead of the tip surface 20a to stabilize the cylindrical tip member 20 so that it is engaged with the workpiece W. FIG. 10 shows the one having the same flange 20e and a shorter cylindrical portion 20f that enters the processing hole h. With the cylindrical portion 20f, the cylindrical front-end member 20 can be easily integrated into the processing hole h, and the flange 20e can make the cylindrical front-end member 20 in operation more stable.

Although the above description is directed to the embodiment of the hand-held burr removing machine of the present invention, the present invention is not limited to this. For example: Although the front end support member 22a shown in FIG. 3 is slightly triangular, when the machining hole h necessary for the burr removal operation is located at a corner (corner) restricted by the corner wall of the workpiece W As long as the front end support member 22a can easily enter the corner, it can be any shape other than a triangle. The motor is not limited to a pneumatic motor, and may be an electric motor. In addition, although the hand-held burr remover of the present invention is suitable for removing burrs in the processing hole, it can also be used for polishing the surface of the processing hole.

h‧‧‧Machining hole W‧‧‧Workpiece X‧‧‧Axis 10‧‧‧Hand-held burr removing machine 12‧‧‧Grinding brush 12a‧‧‧Grinding wire 12b‧‧‧Cylinder-shaped binding member 12c‧ ‧‧Connecting rod 14‧‧‧Motor 14a‧‧‧Rotating shaft 14b‧‧‧Cylinder front extension 18‧‧‧Body 18a‧‧‧Gripping part 18b‧‧‧Support hole 20‧‧‧Cylinder front end Member 20a‧‧‧Front end pointed surface 20b‧‧‧Hole 20c‧‧‧Cylinder part 20d‧‧‧Front end surface 20e‧‧‧Flange 20f‧‧‧Cylinder part 22‧‧‧Guide member 22a‧‧‧Front end Support member 22b‧‧‧Guide rod 22c‧‧‧ Stopper (reverse stopper) 22d‧‧‧Compression coil spring (elastic member) 24‧‧‧Compressed air receiver tube 24a‧‧‧Trigger 24b‧‧‧ Valve member 26 ‧ ‧ Motor stopper (rotation stopper) 26a ‧ ‧ Stopper support member 26b ‧ ‧ Position adjustment screw 26c ‧ ‧ Stopper part 26d ‧ ‧ Stopper body

Fig. 1 is a longitudinal cross-sectional view in the front and rear direction of the hand-held burr removing machine of the present invention, showing a schematic view of the basic structure of the grip portion.　　[Fig. 2] is a longitudinal sectional view of the main part of the hand-held burr remover in Fig. 1, showing the state when the abrasive brush is projected forward.　　[Fig. 3] shows the hand-held burr remover of Fig. 1 as seen from the front, a cylindrical front end member surrounding the front end of the abrasive brush, and a front end support member supporting the cylindrical front end member. [Fig. 4] is a cross-sectional view of the cylindrical front end member. The cylindrical front end member is integrated and engaged when the hand-held burr remover of Fig. 1 is used to remove the burr in the machining hole of the workpiece. The state of the machining hole.　　[Figure 5] is a cross-sectional view of a cylindrical front end member, which is suitable for burr removal when the intersection of the machining hole is close to the surface of the workpiece.　　[Figure 6] is a cross-sectional view of a cylindrical front end member, which is suitable for the case where the distance from the surface of the workpiece to the machining hole for burr removal is long.　　[Fig. 7] is a cross-sectional view of a cylindrical front end member, the cylindrical front end member is suitable for: stable engagement with the workpiece.　　[Fig. 8] is a cross-sectional view of a cylindrical front end member, which is suitable for removing burrs in the machining hole of a cylindrical workpiece.　　[Figure 9] is a cross-sectional view of a cylindrical front end member, which is suitable for stably engaging with the flat surface of the workpiece.　　 [Fig. 10] is a cross-sectional view similar to the cylindrical front end member of Fig. 9, but showing a shorter cylindrical portion inserted into the processing hole.

10‧‧‧Hand-held burr removing machine

12‧‧‧Grinding brush

12a‧‧‧Grinding wire

12b‧‧‧Cylinder-shaped binding member

12c‧‧‧Connecting rod

14‧‧‧Motor

14a(14b)‧‧‧Rotating shaft (tubular front extension)

18‧‧‧Ontology

18a‧‧‧Grip

18b‧‧‧Support hole

20‧‧‧Cylinder front end member

22‧‧‧Guide member

22b‧‧‧Guide rod

22c‧‧‧stop

22d‧‧‧Compression coil spring

24‧‧‧Compressed air pipe

24a‧‧‧ trigger

24b‧‧‧Valve component

26‧‧‧Motor stop

Claims (10)

A hand-held burr removing machine has: a polishing brush having: a plurality of polishing wires extending from the front end toward the rear and bundled at the rear end; and connecting the rear ends of the polishing wires extending toward the rear Rod; body, the system can be held by the operator, and equipped with a motor, the motor is drivingly connected with the rear end of the connecting rod, and the grinding brush is driven to rotate around an axis extending in the front and rear direction; cylindrical A front end member, the cylindrical front end member is installed to surround the periphery of the front end portion of the polishing wire, and is displaceable along the polishing brush; and a guide member installed on the cylindrical front end member and connected to the The abrasive brushes extend in parallel to the rear and are supported by the main body so as to be displaceable in the front-to-rear direction, so that the cylindrical front end member can be displaced rearward along the abrasive brush. The grinding brush is pushed forward and rotated to perform the burr removal operation using the grinding brush, wherein the cylindrical front end member has an engagement portion, and when grinding the processing hole provided in the workpiece, the The engaging portion is engaged with the surface surrounding the processing hole of the workpiece. A hand-held burr removing machine has: a polishing brush having a plurality of polishing wires extending from the front end to the rear and bundled at the rear end, and a rear connecting the polishing wires The connecting rod with the end extending toward the rear; the body, the system can be held by the operator, and is equipped with a motor, the motor is drivingly connected with the rear end of the connecting rod, and the grinding brush is driven to an axis extending in the front-rear direction As a central rotation drive; a cylindrical front end member, the cylindrical front end member is installed to: surround the periphery of the front end portion of the polishing wire, and can be displaced along the polishing brush; and a guide member, the guide member is installed on the The cylindrical front end member extends backward in parallel with the abrasive brush, 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 toward the rear along the abrasive brush , The grinding brush is pushed forward and rotated from the cylindrical front end member to perform the burr removal operation using the grinding brush, wherein the guide member has a retractable stop portion that can be displaced along the guide member When the guide member retreats, the retreat stop portion is engaged with the main body to stop the retreat of the guide member. A hand-held burr removing machine has: a polishing brush having: a plurality of polishing wires extending from the front end toward the rear and bundled at the rear end; and connecting the rear ends of the polishing wires extending toward the rear Rod; body, the system can be held by the operator, and equipped with a motor, the motor is drivingly connected with the rear end of the connecting rod, and the grinding brush is driven to rotate around an axis extending in the front and rear direction; cylindrical The front end member, the cylindrical front end member is installed to surround the research The periphery of the front end portion of the grinding wire can be displaced along the abrasive brush; and a guide member installed on the cylindrical front end member and extending backward in parallel with the abrasive brush, so as to be able to move forward and backward The direction shift is supported by the main body, so that the cylindrical front end member can be displaced toward the rear along the abrasive brush, and the abrasive brush is pushed out and rotated forward from the cylindrical front end member. The burr removal operation using the polishing brush includes a rotation stopper that prevents the motor from rotating when the cylindrical front end member is positioned around the front end portion of the polishing wire. A hand-held burr removing machine has: a polishing brush having: a plurality of polishing wires extending from the front end toward the rear and bundled at the rear end; and connecting the rear ends of the polishing wires extending toward the rear Rod; body, the system can be held by the operator, and equipped with a motor, the motor is drivingly connected with the rear end of the connecting rod, and the grinding brush is driven to rotate around an axis extending in the front and rear direction; cylindrical A front end member, the cylindrical front end member is installed to surround the periphery of the front end portion of the polishing wire, and is displaceable along the polishing brush; and a guide member installed on the cylindrical front end member and connected to the The abrasive brush extends parallel to the rear, and is supported by the main body in a manner displaceable in the front-to-rear direction, so that the cylindrical front end member can be displaced toward the rear along the abrasive brush, The grinding brush is pushed forward and rotated from the cylindrical front end member to perform the burr removal operation using the grinding brush, wherein the guide member has a front end support member, and the front end support member supports the cylindrical A front end member; and at least two guide rods that are spaced apart from each other, the guide rods extend from the front end support member parallel to the plurality of polishing wires toward the rear, and are slidably supported by the body in the front-rear direction. The hand-held burr remover according to any one of claims 1 to 4, wherein the cylindrical front end member is partially inserted into the opening of the processing hole provided in the workpiece, and can be engaged with the edge of the opening. The hand-held burr remover of any one of claims 1 to 4, wherein the system has a handle-shaped grip, and the grip-shaped grip is in a state where the abrasive brush faces forward Down, you can hold the body. The hand-held burr remover according to any one of claims 1 to 4, which has: an elastic pushing member that pushes the guide member toward the front relative to the main body to make the cylindrical front end member It becomes a position surrounding the front end portion of the polishing wire. For example, the hand-held burr removing machine of claim 3, wherein the motor is a pneumatic motor, having a rotating shaft integrally connected with the grinding brush in the axial direction, and the rotation stopper is connected to a rearward extending from the motor The rotation The rear part of the shaft is engaged to prevent the rotation of the rotating shaft. The hand-held burr removing machine of claim 8, wherein the rotation stopper is installed on the guide member, and the guide member moves backward relative to the main body from behind the rotating shaft Partially separate. For example, the hand-held burr removing machine of claim 4, wherein the front end supporting member is a slightly triangular shape, and the slightly triangular shape takes the part supporting the cylindrical front end member as a vertex, and the guide rod is from a portion adjacent to the other vertex , Extending towards the rear.

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