WO2015133355A1

WO2015133355A1 - Polishing machine

Info

Publication number: WO2015133355A1
Application number: PCT/JP2015/055554
Authority: WO
Inventors: 崇太藤森
Original assignee: 日東工器株式会社
Priority date: 2014-03-07
Filing date: 2015-02-26
Publication date: 2015-09-11
Also published as: EP3115150A4; AU2015225119B2; TWI568532B; CN106061677B; KR20160119160A; JP6249828B2; CN106061677A; EP3115150B1; JP2015168032A; AU2015225119A1; TW201600227A; KR101882119B1; EP3115150A1

Abstract

[Problem] To provide a polishing machine which achieves vibration reduction. [Solution] A polishing material holding member (16) in a polishing machine (10) is attached to a drive shaft (22) rotatably around an eccentric axis (25) with respect to a rotational drive center axis (24) of the drive shaft (22) rotationally driven by a vane-type air motor (18), and has a motion restriction part (40) provided at a position apart from the eccentric axis in the direction of a radial axis (38) of the eccentric axis. A pair of guide rollers (42, 43) provided in a body part (12) is disposed such that a first engagement position of one guide roller (42) and the motion restriction part and a second engagement position of the other guide roller (43) and the motion restriction part are disposed so as to be located laterally on the opposite sides of the radial axis (38) with the radial axis therebetween, and when the drive shaft (22) is rotationally driven, restricts the motion of the polishing material holding member (16) such that the polishing material holding member (16) is displaced in the direction of the radial axis (38) while pivoting about a position between the first engagement position and the second engagement position.

Description

Polishing machine

The present invention relates to a polishing machine, and more particularly to a polishing machine in which an abrasive holding member to which an abrasive is attached is driven to rotate eccentrically.

In the polishing machine, the abrasive holding member to which the abrasive is attached is attached to the drive shaft so as to be rotatable about an eccentric axis passing through a position parallel to the rotation drive center axis of the drive shaft and away from the rotation drive center axis. Further, there is an apparatus that supports the movement of the radial axis with respect to the eccentric axis in the left-right direction so that the abrasive moves in an elliptical shape in which the longitudinal movement and the rocking movement are combined. In such a polishing machine, in order to restrict the lateral movement of the abrasive holding member, the guide rollers attached to the polishing machine body are rotated on the left and right side surfaces of the groove provided in the abrasive holding member. It is made to engage. (Patent Document 1)

Japanese Patent No. 5363870

In the conventional polishing machine described above, the guide roller regulates the operation in the left-right direction at the position where the groove in the abrasive holding member is formed by alternately engaging the left and right side surfaces of the groove. Yes. In order for the guide roller to rotate smoothly and engage with the groove, the guide roller must always engage with only one side of the groove without simultaneously engaging the left and right sides of the groove. Therefore, the diameter of the guide roller is set smaller than the lateral width of the groove, and a gap is formed between the guide roller and one side surface of the groove. Therefore, when the abrasive holding member is driven, the guide roller collides with the side surface when the guide roller shifts from the engaged state to the other side surface. Become. Since the abrasive holding member is driven at a high speed, this collision occurs continuously, and as a result, a large vibration may occur in the polishing machine.

An object of the present invention is to provide a polishing machine that can reduce the vibration generated in such a conventional polishing machine.

That is, the present invention
The main body,
A motor attached to the main body,
A drive shaft that is rotationally driven by the motor;
An abrasive holding member attached to the drive shaft so as to be rotatable around an eccentric axis passing through a position parallel to the rotational drive central axis of the drive shaft and away from the rotational drive central axis. An abrasive holding member having an operation restricting portion provided at a position away from the eccentric axis in the direction of the radial axis of the eccentric axis;
A pair of guide members that are attached to the main body portion at a position away from the rotational drive central axis and engage with the operation restricting portion, wherein one guide member and the operation restricting portion engage with each other. And the second engagement position where the other guide member and the operation restricting portion engage with each other is disposed so as to be located on the opposite sides of the radial axis with the radial axis interposed therebetween, When the drive shaft is driven to rotate, the abrasive holding member is displaced in the direction of the radial axis while pivoting about a position between the first engagement position and the second engagement position. A pair of guide members for regulating the operation of the abrasive holding member,
A polishing machine is provided.

In the polishing machine, the pair of guide members are arranged so that the engagement positions of the guide members and the operation restricting portions are located on the left and right opposite sides with respect to the radial axis. It is possible to restrict the operation of the abrasive holding member in a state where the restricting portions are always in contact with each other without being separated from each other. Therefore, it is possible to reduce the vibration caused by the gap between the guide member and the operation restricting portion as in the prior art.

Preferably, each of the pair of guide members may include a guide roller that is rotatable with respect to the main body.

With such a configuration, since the operation restricting portion smoothly rotates and engages with the guide member, it is possible to reduce friction between the operation restricting portion and the guide member and further reduce vibration. Become.

Preferably, the rotation center axis of each guide roller may be inclined in directions opposite to each other with respect to the rotation drive center axis.

More preferably, the engagement surface of the operation restricting portion that engages with the pair of guide members is formed so as to be inclined with respect to the eccentric axis and away from a position where the abrasive is attached. Can do.

With such a configuration, the load received by the abrasive holding member when the abrasive is pressed against the work material can be supported not only at the attachment portion to the drive shaft but also at the engagement portion with the guide member. Therefore, the bending of the abrasive holding member due to the load can be reduced and the stress received by the abrasive holding member can be dispersed to prevent the abrasive holding member from being damaged.

Preferably, the operation restricting portion has a protruding shape and can be sandwiched between the pair of guide members.

Preferably, at least a portion of the pair of guide members that engages with the operation restricting portion may be formed of an elastic member.

Also preferably, the operation restricting portion of the abrasive holding member can be formed of an elastic member.

As described above, since the engaging portion between the guide member and the operation restricting portion is formed by the elastic member, it is possible to further reduce the transmission of the vibration to the main body portion by absorbing the vibration by the elastic member.

Specifically, the abrasive holding member is attached to the drive shaft, a drive shaft mounting portion, an upper surface facing the main body portion and the operation restricting portion is provided, and a lower surface facing the opposite side of the upper surface , And a second portion extending from the lower surface of the first portion, and an abrasive attachment portion for attaching an abrasive is provided at the tip of the second portion, and the radiation The operation restricting portion may be positioned between the drive shaft attaching portion and the abrasive attaching portion in the axial direction.

Hereinafter, embodiments of a polishing machine according to the present invention will be described with reference to the accompanying drawings.

It is a left side view of the polisher concerning one embodiment of the present invention. It is a front view of the polisher of FIG. It is sectional drawing in the III-III line of FIG. It is a top view which shows an abrasive member holding member and a pair of guide rollers. It is a schematic diagram which shows the relationship between a pair of guide roller and operation | movement control part in 2nd Embodiment. It is a schematic diagram which shows the relationship between a pair of guide roller and operation | movement control part in 3rd Embodiment. It is a left view of the polisher in the state where the flat abrasive holding member was attached. It is a left view of the polisher in the state where the disk-shaped abrasive holding member was attached.

As shown in FIGS. 1 and 2, a polishing machine 10 according to an embodiment of the present invention includes a main body 12 and an abrasive holding member 16 attached to a holding member attachment 14 located at the lower end of the main body 12. With. As shown in FIG. 3, a vane air motor 18 is provided inside the main body 12, and a cup-shaped drive shaft 22 is fixed to the lower end of the output shaft 20 of the vane air motor 18. The drive shaft 22 is rotationally driven around a rotational drive central axis 24 that coincides with the axis of the output shaft 20. The drive shaft 22 is provided with a recess 26 having a circular cross-section centered on an eccentric axis 25 passing through a position parallel to the rotation drive center axis 24 and away from the rotation drive center axis 24. A cylindrical member 30 is rotatably attached via a radial bearing 28 attached to the inner peripheral surface 27. The inner peripheral surface of the cylindrical member 30 forming the inner raceway of the radial bearing 28 has a screw hole 32, and a bolt 36 is screwed into the screw hole 32 through the stepped hole 34 of the abrasive material holding member 16. Thus, the abrasive holding member 16 is fixed to the cylindrical member 30. In this way, the abrasive holding member 16 is attached to the drive shaft 22 that is driven to rotate about the rotation drive center axis 24 so as to be rotatable about the eccentric axis 25. As will be described later, the abrasive holding member 16 has an operation restricting portion 40 extending along a radial axis 38 extending in a predetermined radial direction (radial direction) from the eccentric axis 25, and the operation restricting portion 40 is a main body portion. The pair of

guide rollers

42 and 43 provided on the 12 holding member mounting portions 14 are engaged from both sides, and the movement of the operation restricting portion 40 in the left-right direction is restricted. As a result, the abrasive 44 attached to the tip of the abrasive holding member 16 moves in a reciprocating elliptical manner. The polishing machine 10 is an apparatus in which the abrasive 44 that reciprocally moves in an elliptical shape is pressed against the work material to perform the work of polishing the work material.

An air tube connecting portion 46 for connecting an air tube extending from an air pump (not shown) is provided at the rear end (right end as viewed in FIG. 3) of the main body portion 12, and compression supplied from the connected air tube Air is introduced into the main body 12. An open / close valve mechanism 52 that is opened and closed by an operation lever 50 that is pivotally attached to the main body 12 is provided in a compressed air flow path 48 that extends from the air tube connection 46 to the vane air motor 18. The operation of the vane air motor 18 is controlled by operating the operation lever 50 to control the supply of compressed air to the vane air motor 18. Since the vane type air motor 18 and the on-off valve mechanism 52 in the polishing machine 10 are well known to those skilled in the art, a detailed description thereof will be omitted.

The abrasive holding member 16 extends forward (leftward as viewed in FIGS. 3 and 4) and has a horizontal portion 56 having an upper surface 54 facing the main body 12 and a lower surface 55 facing the opposite side. The vertical portion 58 extends downward from the front end portion 57 of the lower surface 55 of the horizontal portion 56, and the abrasive attachment portion 59 extends forward from the lower end of the vertical portion 58. The abrasive 44 is attached to the lower surface 61 of the abrasive attachment portion 59 with an adhesive seal. Further, ribs 60 are provided on both side surfaces of the horizontal portion 56, the vertical portion 58, and the abrasive attachment portion 59 so that the abrasive holding member 16 has sufficient strength.

As shown in FIG. 4, the pair of

guide rollers

42 and 43 described above are disposed so as to be positioned on opposite sides of the radial axis 38 with a predetermined radial axis 38 extending from the eccentric axis 25 interposed therebetween. Further, as can be seen from FIG. 2, the respective rotation center axes 62 and 63 correspond to the rotation drive center axis 24 of the drive shaft 22 so as to approach each other upward when the polishing machine 10 is viewed from the front. Are inclined in opposite directions. As a result, the rotational engagement surfaces 64 and 65 of the

guide rollers

42 and 43 are also inclined with respect to the rotational drive center axis 24, as with the rotational center axes 62 and 63 of the

guide rollers

42 and 43. Yes. Here, the direction “left and right of the radial axis 38” means a direction perpendicular to the eccentric axis 25 and the radial axis 38. 2 corresponds to the right side of the radial axis 38, and the right side of the drawing corresponds to the left side of the radial axis 38. 4 corresponds to the right side of the eccentric axis 25, and the lower side of the figure corresponds to the left side of the eccentric axis 25.

On the upper surface 54 of the abrasive holding member 16, an operation restricting portion 40 made of a rubber material is provided at a position away from the eccentric axis 25 in the direction of the radial axis 38 of the eccentric axis 25. The operation restricting portion 40 has fixed engagement surfaces 68 and 69 that engage with the pair of

guide rollers

42 and 43. The fixed engagement surfaces 68 and 69 are located on the left and right sides of the radial axis 38 as can be seen from FIG. Abrasive material mounted on the opposite side, inclined in opposite directions with respect to the eccentric axis 25 (in FIG. 2, overlapped with the rotational drive center axis 24) when the polishing machine 10 is viewed from the front. It is formed so as to face away from the portion 59 (upper side in the figure). Further, the inclination angles of the fixed engagement surfaces 68 and 69 are set to be the same as the inclination angles of the rotation center axes 62 and 63 of the

corresponding guide rollers

42 and 43. The operation restricting portion 40 has a protruding shape protruding upward, and is sandwiched between the pair of

guide rollers

42 and 43. Therefore, the engagement position between the left guide roller 42 and the left fixed engagement surface 68 of the operation restricting portion 40, the right guide roller 43 and the right fixed engagement surface 69 of the operation restricting portion 40, and Is located on the opposite side of the radial axis 38 with the radial axis 38 in between.

When the vane air motor 18 is rotationally driven, the abrasive material holding member 16 performs an eccentric circular motion with respect to the rotational drive center axis 24 at the position of the stepped hole 34, but at the position where the operation restricting portion 40 is provided, Engagement positions where the movement of the radial axis 38 in the left-right direction is restricted by the pair of

guide rollers

42, 43, and the fixed engagement surfaces 68, 69 of the operation restriction part 40 are engaged with the

guide rollers

42, 43. While moving around the position between the two, the movement is performed so as to be displaced along the direction of the radial axis 38 of the eccentric axis 25. As a result, the abrasive material mounting portion 59 positioned further forward of the motion restricting portion 40 when viewed in the direction of the eccentric axis 25 performs a reciprocating elliptical motion by a combination of a swinging motion and a linear motion. The locus of the abrasive attachment portion 59 varies depending on the positional relationship among the eccentric axis 25, the operation restricting portion 40, and the abrasive attachment portion 59, and the operation restricting portion 40 is located between the eccentric axis 25 and the abrasive attachment portion 59. When it is located at a point, it is circular, but here it is called elliptical motion including motion that draws such a circular trajectory. Further, the locus of the abrasive attachment portion 59 is not exactly an ellipse or a circle, but has a slightly distorted shape.

As described above, in the polishing machine 10, the operation restricting portion 40 is engaged and supported by the two

separate guide rollers

42 and 43 at the positions on the left and right sides of the radial axis 38 of the eccentric axis 25. The operation restricting portion 40 and the

guide rollers

42 and 43 can always be in contact with each other without being separated. As a result, the operation restricting portion 40 and the

guide rollers

42 and 43 do not collide, and vibration can be greatly reduced.

In the present embodiment, as described above, the operation restricting portion 40 of the abrasive holding member 16 is formed of a rubber material that is an elastic member. Therefore, when the abrasive holding member 16 is moved, a pair of guide rollers The movement restricting portion 40 sandwiched between the

guide rollers

42 and 43 is always in contact with the

guide rollers

42 and 43 while being elastically deformed at the engagement position with the

guide rollers

42 and 43. Further, since the operation restricting portion 40 is formed of a rubber material, vibration of the abrasive holding member 16 is absorbed, and transmission of vibration to the main body portion 12 is further reduced. In the present embodiment, the operation restricting portion 40 is formed of an elastic member, but the

rotation engaging surfaces

64 and 65 of the

guide rollers

42 and 43 may be formed of an elastic member.

As described above, the fixed engagement surfaces 68 and 69 of the operation restricting portion 40 face obliquely upward, and the rotational engagement surfaces 64 and 65 of the

guide rollers

42 and 43 face obliquely downward. The

guide rollers

42 and 43 can receive not only the lateral force from the abrasive holding member 16 but also the upward force. Thus, the upward force received by the abrasive holding member 16 when the abrasive 44 is pressed against the work material during the polishing operation can be received not only by the connecting portion with the drive shaft 22 but also by the operation restricting portion 40. As a result, the stress on the abrasive holding member 16 is dispersed and the abrasive holding member 16 is not easily damaged. Further, since the vertical deflection in the abrasive attachment portion 59 is also reduced, the change in the contact angle between the abrasive 44 and the work material when the abrasive 44 is pressed against the work material is reduced. In addition, the polishing action can be performed in a state where the contact state between the abrasive and the work material is more stable.

In the above-described embodiment, the pair of

guide rollers

42 and 43 are attached so that the rotation center axes 62 and 63 are inclined, so that the inclination angles of the rotation engagement surfaces 64 and 65 are fixed engagement surfaces of the operation restricting portion 40. The inclination angle is approximately the same as the inclination angles of 68 and 69. In another embodiment, as illustrated in FIG. 5, the rotation center axes 162 and 163 are parallel to the rotation drive center axis 24 of the drive shaft 22, and the rotation engagement surfaces 164 and 165 are aligned with the rotation center axes 162 and 163. It is also possible to use

guide rollers

142, 143 which are conical surfaces which are inclined with respect to them. Further, in still another embodiment, the operation restricting portion 240 is not formed in a protruding shape, but is fixed to engage the

guide rollers

242 and 243 as shown in FIG. The engagement surfaces 268 and 269 can also be used. In this case, the fixed engagement surfaces 268 and 269 are formed to face each other in the left-right direction and face upward. The

guide rollers

242 and 243 are attached so as to incline in opposite directions with respect to the rotational drive center axis 24 of the drive shaft 22 so that the rotational center axes 262 and 263 approach each other downward.

The abrasive holding member 16 of the polishing machine 10 can be easily removed by removing the bolt 36, and can be replaced with another abrasive holding member as necessary. For example, as shown in FIG. 7, it can be replaced with a flat abrasive holding member 116. The abrasive holding member 116 is rotatably attached to the drive shaft 22 like the abrasive holding member 16 of FIGS. 1 to 4, and the operation restricting portion 140 is sandwiched between the pair of

guide rollers

42 and 43. It has become so. Accordingly, the abrasive 144 attached to the lower surface 161 of the abrasive holding member 116 reciprocates in an elliptical shape. Alternatively, as shown in FIG. 8, the disk-shaped abrasive holding member 216 can be replaced. The abrasive holding member 216 does not include the

operation restricting portions

40 and 140 that engage with the pair of

guide rollers

42 and 43, and is free without being restricted from rotating around the eccentric axis 25. . When the vane air motor 18 is driven in a state where the abrasive 244 attached to the lower surface 261 is pressed against the work material, the abrasive holding member 216 revolves around the drive rotation center axes 62 and 63 of the drive shaft 22. However, the abrasive 244 rotates around the eccentric axis 25 by the frictional force received from the work material and the centrifugal force of the abrasive holding member 216 itself.

In this embodiment, by using the

guide rollers

42 and 43 as guide members for guiding the

operation restricting portions

40 and 140 of the

abrasive holding members

16 and 116, the

operation restricting portions

40 and 140 are rotationally supported and the operation restricting portions. The sliding friction between 40 and 140 is reduced. However, it is not always necessary to use the

guide rollers

42 and 43 as the guide members. For example, the

operation restricting portions

40 and 140 may be slidably supported by a member of a low friction material, or the operation restricting portion 40 may be used. , 140 may be supported by a member that is elastically deformed flexibly in accordance with the operation 140.

Polishing machine 10; body portion 12; holding member mounting portion 14; abrasive material holding member 16; vane air motor 18; output shaft 20; drive shaft 22; rotational drive center axis 24; eccentric axis 25; circular inner peripheral surface 27; Cylindrical member 30; screw hole 32; stepped hole 34; bolt 36; radial axis 38; operation restricting portion 40: guide

rollers

42 and 43; abrasive 44; air tube connecting portion 46; Operation lever 50; on-off valve mechanism 52; upper surface 54; lower surface 55; horizontal portion 56; front end portion 57; vertical portion 58; abrasive material mounting portion 59; rib 60;

Surfaces

64 and 65; fixed engagement surfaces 68 and 69; (flat plate) abrasive holding member 116; operation restricting portion 140; guide

rollers

142 and 143; abrasive 144; lower surface 161; 163; rotational engagement surfaces 164, 165; (disc-shaped) abrasive holding member 216; operation restricting portion 240; guide

rollers

242, 243; abrasive 244; lower surface 261;

rotation center axis

262, 263 fixed

engagement surface

268, 269;

Claims

The main body,
A motor attached to the main body,
A drive shaft that is rotationally driven by the motor;
An abrasive holding member attached to the drive shaft so as to be rotatable around an eccentric axis passing through a position parallel to the rotational drive central axis of the drive shaft and away from the rotational drive central axis. An abrasive holding member having an operation restricting portion provided at a position away from the eccentric axis in the direction of the radial axis of the eccentric axis;
A pair of guide members that are attached to the main body portion at a position away from the rotational drive central axis and engage with the operation restricting portion, wherein one guide member and the operation restricting portion engage with each other. And the second engagement position where the other guide member and the operation restricting portion engage with each other is disposed so as to be located on the opposite sides of the radial axis with the radial axis interposed therebetween, When the drive shaft is driven to rotate, the abrasive holding member is displaced in the direction of the radial axis while pivoting about a position between the first engagement position and the second engagement position. A pair of guide members for regulating the operation of the abrasive holding member,
A polishing machine comprising:
The polishing machine according to claim 1, wherein each of the pair of guide members includes a guide roller that is rotatable with respect to the main body.
The polishing machine according to claim 2, wherein the rotation center axis of each guide roller is inclined in directions opposite to each other with respect to the rotation drive center axis.
The engagement surface of the operation restricting portion that engages with the pair of guide members is formed to be inclined with respect to the eccentric axis and to face away from a position where an abrasive is attached. The polishing machine according to any one of 1 to 3.
The polishing machine according to any one of claims 1 to 4, wherein the operation restricting portion has a protrusion shape and is sandwiched between the pair of guide members.
The polishing machine according to any one of claims 1 to 5, wherein at least a portion of the pair of guide members that engages with the operation restricting portion is formed of an elastic member.
The polishing machine according to any one of claims 1 to 6, wherein the operation restricting portion of the abrasive holding member is formed of an elastic member.
The abrasive holding member has a drive shaft attachment portion attached to the drive shaft, a top surface facing the main body portion and provided with the operation restricting portion, and a bottom surface facing the opposite side of the top surface. A second portion extending from the lower surface of the first portion, and an abrasive attachment portion for attaching an abrasive to the tip of the second portion is provided, and in the direction of the radial axis, The polishing machine according to any one of claims 1 to 7, wherein an operation restricting portion is positioned between the drive shaft attaching portion and the abrasive attaching portion.