JP2004106063A - Grinder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinder easily and smoothly performing chamfering. <P>SOLUTION: The rotating force from a geared motor 5 is transmitted to a grinding wheel 17 comprising a flexible material used as binder, via an output shaft 10. A work is guided along a sliding surface 37a of a guide member 37 disposed adjacent to the outer circumferential surface of the grinding wheel 17. The grinding wheel 17 is advanced/retreated to/from a through hole 39 in the guide member 37 so that the outer circumferential surface of the grinding wheel 17 slightly projects from the through hole 39 to the side of the sliding surface 37a. In this state, the work is guided along the sliding surface 37a and a corner part of the work is ground by the outer circumferential surface of the grinding wheel into an arc cross section. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding device for grinding a metal work.
[0002]
2. Description of the Related Art Conventionally, corner chamfering grinding of a metal work is performed by a rotating grinding wheel. However, in the normal chamfering process, the chamfered portion eventually has a new angle, so that the entire corner portion originally draws a smooth curve, so-called "R (R)" (hereinafter, such a process is referred to as a rounding process). Is desirable.
[0003]
However, it is not always easy to perform round processing on the corners, and a conventional grinding device using a grinding wheel requires skill and processing time, which is not easy.
The present invention has been made by focusing on the problems existing in such conventional techniques. An object of the present invention is to provide a grinding device capable of easily performing smooth chamfering.
[0004]
In order to solve the above-mentioned problems, according to the first aspect of the present invention, in a grinding apparatus, a driving source, an output shaft that rotates by obtaining a rotational force from the driving source, and an output shaft. A grinding wheel formed of a flexible material that is fixed and rotates together with the output shaft as a binder; and a guide member that guides the workpiece along a workpiece sliding surface disposed adjacent to an outer peripheral surface of the grinding wheel. The gist is to have an advance / retreat mechanism that relatively moves the grinding wheel and the guide member forward and backward so that the outer peripheral surface of the grinding wheel faces the work sliding surface. I do.
With this configuration, the guide member and the grinding wheel are driven closer to each other by driving the advance / retreat mechanism, and are arranged so that the outer peripheral surface of the grinding wheel and the work sliding surface of the guide member face each other. Then, the workpiece is slid on the workpiece sliding surface and ground by the outer peripheral surface of the grinding wheel. Since the grinding wheel is made of a flexible material as a bonding material, when the corner of the work comes into contact during grinding, the wheel is bent by the pressing force and wraps around the corner of the work. Then, the corners of the work are similarly ground into a circular cross section by the bent inner surface of the circular cross section of the grinding wheel.
[0005]
According to a second aspect of the present invention, in the configuration of the first aspect, the axial direction of the output shaft and the sliding direction of the work on the work sliding surface of the guide member are arranged so as not to be orthogonal to each other. That is the gist.
Thereby, in addition to the effect of claim 1, when the corner portion of the work is ground by the outer peripheral surface of the grinding wheel, the corner portion of the work comes into wide contact with the outer peripheral surface of the grinding wheel, so that the grinding wheel is partially reduced. Is prevented.
[0006]
In the invention according to claim 3, an output shaft that rotates by obtaining a rotational force from the drive source, a grinding wheel configured as a binding material and a flexible material fixed to the output shaft and rotating with the output shaft, A guide member for guiding a work along a work sliding surface disposed adjacent to an outer peripheral surface of the grinding wheel; and an outer peripheral surface of the grinding wheel by relatively moving the grinding wheel and the guide member back and forth. And a reciprocating mechanism arranged to face the work sliding surface, wherein one of a male screw or a female screw is fixed to the guide member as the reciprocating mechanism, and the guide member is disposed. The other side of the male screw or the female screw is fixed to the base side, and the guide member is advanced and retracted in the direction of the grinding wheel based on the same base by the relative rotation of the screwed male screw and the female screw, Between male and female threads It is summarized in that which is adapted to arrange the biasing means for biasing the two screws along the axial direction of the both screws in opposite directions.
With this configuration, the guide member is moved closer to the grinding wheel by driving the advance / retreat mechanism, and the guide member is arranged so that the outer peripheral surface of the grinding wheel and the work sliding surface thereof face each other. Then, the work sliding surface is slid, and the work is ground by the outer peripheral surface of the grinding wheel. Since the grinding wheel is made of a flexible material as a bonding material, when the corner of the work comes into contact during grinding, the wheel is bent by the pressing force and wraps around the corner of the work. Then, the corners of the work are similarly ground into a circular cross section by the bent inner surface of the circular cross section of the grinding wheel. At this time, the guide member is advanced and retracted with respect to the base by the relative rotation of the screwed male screw and female screw. In such forward and backward movements due to the rotation of the screw, slight backlash occurs when the screw is reversed due to the tolerance of the screw. However, since the two screws are urged in the opposite directions by the urging means as described above, such rattling is eliminated.
[0007]
According to a fourth aspect of the present invention, in the configuration of the third aspect, the axial direction of the output shaft and the sliding direction of the work on the work sliding surface of the guide member are arranged so as not to be orthogonal to each other. That is the gist.
Thereby, in addition to the effect of claim 3, when the corner portion of the work is ground by the outer peripheral surface of the grinding wheel, the corner portion of the work comes into wide contact with the outer peripheral surface of the grinding wheel, so that the grinding wheel is partially reduced. Is prevented.
[0008]
【The invention's effect】
According to the first aspect of the present invention, smooth chamfering can be easily performed. According to the third aspect of the present invention, smooth chamfering can be easily performed, and rattling based on screw tolerance when the guide member is moved forward and backward is eliminated, and accurate positioning of the guide member is quickly performed. be able to.
. According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, it is possible to prevent the grinding wheel from being partially reduced. According to the fourth aspect of the invention, in addition to the effect of the third aspect of the invention, it is possible to prevent the grinding wheel from being reduced in size.
[0009]
Embodiments of the present invention will be described below with reference to the drawings. In the following description, the front means the downward direction in FIG. 3 and the rear means the upward direction in FIG.
As shown in FIGS. 1, 3 and the like, a geared motor 5 is provided on a first gantry 4 on a base 3 of the grinding device 1. The geared motor 5 is composed of a single-phase AC induction motor and a reduction mechanism. The first output shaft 6 is exposed rearward. A bearing block 7 is arranged on the second gantry 8 of the base 3 adjacent to the geared motor 5. As shown in FIG. 3, a second output shaft 10 protruding forward and backward is rotatably supported by a bearing 9 of a bearing block 7. A timing belt 11 is wound between the rear side of the second output shaft 10 and the first output shaft 6 so that the torque from the geared motor 5 is transmitted to the second output shaft 10. It has become. A grinding wheel 13 is fixed to the front end of the second output shaft 10 in a side view T-shape by a bolt 14 and is rotatable in the circumferential direction integrally with the second output shaft 10.
The grinding wheel 13 is a kind of elastic grinding wheel in which abrasive grains are blended using silicone rubber as a flexible material as a binder.
[0010]
A main plate 15 is arranged at a front position of the base 3 and adjacent to the second gantry 8. As shown in FIG. 3, the main plate 15 intersects the second output shaft 10 at an angle of about 60 degrees in the planar arrangement state, and the grinding wheel 13 fixed to the front end of the second output shaft 10 It is arranged at a position forward of the main plate 15.
The main plate 15 is a rectangular steel plate, and is fixed to the second gantry 8 and the base 3 by bolts (not shown). A steel bracket 17 is fixed to the lower portion on the front side of the main plate 15 by bolts 18. As shown in FIG. 4, the bracket 17 is formed with a table portion 19 that cantileverly projects forward from the main plate 15. The table section 19 is provided with a dial knob 20. As shown in FIG. 8, the dial knob 20 includes a dial portion 20a to which a scale plate G is adhered and a female screw collar 20b erected in the center of the dial portion 20a. A female screw 22 is threaded on the inner peripheral surface of the female screw collar 20b. As shown in FIGS. 2 and 4, the female screw collar 20 b is disposed in a state inserted from below into a through hole 23 formed in the center of the table 19. A switch 21 is provided on the right side of the dial knob 20.
[0011]
A slide base 25 is fixed to the main plate 15 by bolts (not shown). As shown in FIGS. 1 and 5, the slide base 25 is located at an upper position on the front surface of the main plate 15, and intersects with the grinding wheel 13 in a planar arrangement state as shown in FIG. 3. An arc-shaped notch 27 corresponding to the outer shape of the grinding wheel 13 is formed in the upper portion of the slide base 25. Guides 29 are fixed to the left and right positions of the slide base 25 by bolts 30. A screw hole 31 is formed on the right front side of the slide base 25.
A slide 33 is provided on the front surface of the slide base 25. The slide 33 is supported by the front of the slide base 25 and the left and right guides 29 so as to be slidable in the vertical direction. The slide 33 is an inverted H-shaped steel frame, and a male screw 35 is formed on the lower surface at the center thereof. The male screw 35 is screwed with the female screw 22 of the female screw collar 20b. A coil spring 36 is disposed between the slide 33 and the bracket 17 so as to surround the male screw 35 and the female screw collar 20b. The coil spring 36 eliminates rattling based on a tolerance generated between the male screw 35 and the female screw 22 by urging them in opposite directions.
[0012]
A work guide plate 37 as a guide member is fixed to the upper end of the slide 33 by bolts 38. As shown in FIGS. 6A to 6C, the work guide plate 37 is a substantially V-shaped side member formed by connecting two rectangular flat plates at right angles to each other at 90 degrees. An elongated through hole 39 is formed.
The upper surface of the work guide plate 37 is a slide surface 37a on which the work moves while sliding. The slide surface 37a is an ultra-hard flame sprayed surface formed by super-high-speed flame spraying an alloy composed of Wc (tungsten), Co (cobalt), Ni (nickel), and Cr (chrome), and then performing surface grinding.
In the present embodiment, a straight line that intersects two rectangular plates and appears on the slide surface 37a is referred to as an intersection line L. A recess 40 is formed on the back surface of the work guide plate 37 at the position of the through hole 39. As shown in FIGS. 2 and 3, the outer peripheral surface of the grinding wheel 13 is disposed immediately below the through hole 39 of the work guide plate 37. In particular, as shown in FIG. 3, the work guide plate 37 is arranged at an angle of about 60 degrees with respect to the second output shaft 10 in a plane arrangement state without being orthogonal to the longitudinal direction of the work guide plate 37. As a result, the grinding wheel 13 is not parallel to the through hole 39 but faces at an angle of about 30 degrees. The slide 33, the bracket 17, the dial knob 20, the left and right guides 29, and the slide base 25 constitute an advance / retreat mechanism.
[0013]
A long hole 41 is formed at the lower right of the slide 33. The elongated hole 41 has a positional relationship in which the screw hole 31 formed on the front surface of the rear slide base 25 is exposed when the slide 33 is disposed. As shown in FIGS. 1, 3, 5, etc., the male screw 43 a of the lock lever 43 is screwed into the screw hole 31 via the long hole 41. The lock lever 43 is configured to advance and retreat by operating the lever main body 43b to rotate the male screw 43a, and to advance, so that the rear end surface 44 of the lever main body 43b abuts on the periphery of the elongated hole 41 of the slide 33. Then, the slide 33 is pressed against the slide base 25 by the rear end surface 44 to lock the slide 33 so that the slide 33 cannot be moved.
The geared motor 5 and the bearing block 7 are surrounded by a first cover 45, and the grinding wheel 13 is surrounded by a second cover 46. The covers 45 and 46 are shown only in FIG. In the present embodiment, the description of the power supply unit to the geared motor 5 is omitted.
[0014]
Next, the operation of the grinding device 1 configured as described above will be described.
First, the slide 33 is moved up and down to adjust the position of the work guide plate 37 with respect to the grinding wheel 13. Specifically, the dial portion 20a of the dial knob 20 is rotated, and the slide 33 is gradually moved up and down by the screwing relationship between the male screw 35 and the female screw 22 of the female screw collar 20b. At this time, the lock lever 43 is at the imaginary line position shown in FIG. 7, and in this state, the slide 33 is in the unlocked state. As the slide 33 is raised, the work guide plate 37 approaches the grinding wheel 13 from below, and the outer peripheral surface thereof comes into contact with the peripheral edge of the through hole 39. In this state, a part including the outer periphery of the grinding wheel 13 is exposed above the slide surface 37a of the work guide plate 37. Since the actual grinding position needs to be lowered slightly from this, in a state where the grinding wheel 13 abuts (although it is not always necessary to make contact with the grinding wheel 13), the dial portion 20a is rotated backward to move the grinding wheel 13 by a predetermined amount. Lower.
[0015]
Then, with the desired grinding position determined, the lock lever 43 is rotated to the solid line position shown in FIG. 7 to lock the slide 33.
Next, the switch 21 is input. Then, the geared motor 5 is driven, the rotational force of the first output shaft 6 is transmitted to the second output shaft 10 on the bearing block 7 side via the timing belt 11, and the grinding wheel 13 is brought into a grindable state.
For example, consider a case in which chamfering of a rectangular parallelepiped work W made of an aluminum alloy shown in FIG. 10 is performed. As shown in FIG. 9, the work W is set so that the corner to be processed on the slide surface 37 a of the work guide plate 37 is located on the intersection line L. Then, the workpiece W is slid and ground by the grinding wheel 13. Here, since the grinding wheel 13 is flexible, when the corner of the work W comes into contact during grinding, the grinding wheel 13 bends due to the pressing force, and wraps around the corner of the work W. Then, the corner portion of the work W is also ground into the circular arc shape by the bent inner surface of the circular arc shape of the grinding wheel.
[0016]
With this configuration, the following effects can be obtained in the above embodiment.
(1) Conventionally, performing round processing in chamfering a work requires skill and time, which has been expensive. However, with the above configuration, the grinding wheel 13 is flexible, so that the corners of the work W are also ground to the same circular cross section by the bent inner surface of the circular cross section of the grinding wheel. No skill is required, and the grinding time can be extremely reduced, which contributes to cost reduction.
In addition, the finish is beautiful without generating burrs due to grinding unlike the conventional chamfering.
(2) By rotating the dial portion 20a of the dial knob 20, the slide 33 moves up and down, and the position of the work guide plate 37 can be adjusted. Therefore, it is possible to easily adjust the positions of the work guide plate 37 and the grinding wheel 13 so as to obtain desired grinding conditions.
(3) Since the outer peripheral surface of the grinding wheel 13 is exposed from the back surface (lower side) of the work guide plate 37 to the intersection L of the slide surface 37a through the through hole 39, the work W extends along the longitudinal direction of the slide surface 37a. By simply sliding, the radius processing can be performed along the corners, so that extremely accurate and smooth processing can be realized.
[0017]
(4) Generally, in a mechanism for moving one of the male screw and the female screw forward or backward by a screwing relationship, there is a backlash based on a tolerance between the male screw and the female screw. The back-and-forth action is caused by the backlash more than the back-and-forth movement amount. That is, the accuracy of the advance amount was lacking. In order to solve this problem, it is necessary to perform an operation of once rotating in the reverse direction and then rotating in the forward direction again, which is troublesome.
However, in the present embodiment, the male screw 35 and the female screw 22 are urged in opposite directions by the coil spring 36. For this reason, even when the screw is rotated in the reverse direction from the normal rotation state, the contact surface between the male screw 35 and the female screw 22 always comes into contact in only one direction due to the urging force, so that rattling does not occur. Therefore, the operation can be simply performed by simply rotating in the normal and reverse directions, and the operation is simplified.
(5) The grinding wheel 13 is not parallel to the sliding direction of the work guide plate 37 but is arranged at an angle of about 30 degrees. That is, since the rotation direction of the grinding wheel 13 and the advancing direction of the work W are deviated, the corner portion of the work W comes into wide contact with the outer peripheral surface of the grinding wheel 13 to prevent the grinding wheel from being partially reduced.
(6) Since the slide 33 can be firmly fixed to the slide base 25 by the lock lever 43, more accurate grinding is possible.
(7) Since the slide surface 37a is a carbide sprayed surface that has been smoothly ground, it is very hard to be damaged, and as a result, the work W that slides the slide surface 37a is not damaged. In addition, since the slide surface 37a is extremely hard, even if the work W slides on the slide surface 37a, the work W does not easily wear, and the trouble that the work W wears due to aging and the dimensions are out of order is less likely to occur. Furthermore, since the slide surface 37a is smoothly ground, the work W can be smoothly slid without being caught when the work W slides (so-called knocking phenomenon hardly occurs).
[0018]
The present invention can be embodied with the following modifications.
In the above embodiment, the coil spring 36 is used as the urging means, but other urging means may be used.
-It is composed of two orthogonal flat plates like the work guide plate 37, and has an appropriate shape to slide and grind the work W having the right-angled corner as described above. The shape of the work guide plate 37 can be freely changed according to the work. The formation or non-formation of the super-hard sprayed surface is also optional.
In the above embodiment, the geared motor 5 and the bearing block 7 are arranged adjacent to each other, but the grinding wheel 13 may be fixed directly to the first output shaft 6.
-A dust collector may be provided in addition to the grinding device 1.
The work other than the work W may be made of a material other than metal, such as stone, wood, plastic, or glass.
-The geared motor 5 may use a motor other than the above.
. In addition, the present invention can be freely implemented without departing from the spirit of the present invention.
[0019]
Other technical ideas that can be grasped from the above embodiment in order to achieve the object of the present invention will be described below as supplementary notes.
(1) The grinding device according to any one of claims 1 to 4, wherein the guide member includes two orthogonal flat plates.
(2) The grinding device according to any one of claims 1 to 4, wherein the outer peripheral surface of the grinding wheel is exposed from the back surface side of the guide member to the slide surface on the front surface side.
(3) The outer peripheral surface of the grinding wheel is exposed at an intersection line position between the two plane plates arranged in an intersecting manner, according to any one of Claims 1 to 4 or Additional Notes 1 or 2. Grinding equipment.
[0020]
[Brief description of the drawings]
FIG. 1 is a perspective view of a grinding device according to an embodiment of the present invention.
FIG. 2 is a partial sectional front view of the same grinding device.
FIG. 3 is a plan view of the same grinding device.
FIG. 4 is a partial cross-sectional side view of the same grinding device.
FIG. 5 is an exploded perspective view of the same grinding device.
6A is a front view, FIG. 6B is a plan view, and FIG. 6C is a sectional side view of the work guide plate.
FIG. 7 is a partially enlarged front view illustrating an operation state of the same grinding device.
FIG. 8 is a perspective view of a dial knob.
FIG. 9 is an explanatory diagram illustrating a positional relationship between a work and a grinding wheel on a work guide plate.
FIG. 10 is a perspective view of a work.
[Explanation of symbols]
5: Geared motor as drive source, 10: Second output shaft as output shaft, 13: Grinding wheel, 17: Bracket forming a part of advance / retreat mechanism, 20 ... Dial knob forming part of an advance / retreat mechanism, 22 ... Female screw, 25: a slide base forming a part of the advance / retreat mechanism, 29: a guide forming a part of the advance / retreat mechanism, 33: a slide forming a part of the advance / retreat mechanism, 35: male screw, 36: a coil spring as urging means, 37: Work guide plate as guide member; 37a: Slide surface as work slide surface.

Claims (4)

A driving source,
An output shaft that rotates by obtaining torque from the drive source,
A grinding wheel configured as a binder with a flexible material fixed to the output shaft and rotating with the output shaft,
A guide member for guiding the work along a work sliding surface arranged adjacent to the outer peripheral surface of the grinding wheel;
A grinding apparatus comprising: an advance / retreat mechanism configured to relatively advance / retreat the grinding wheel and the guide member so that an outer peripheral surface of the grinding wheel faces a work sliding surface. The grinding device according to claim 1, wherein an axial direction of the output shaft and a sliding direction of the work on the work sliding surface of the guide member are arranged so as not to be orthogonal to each other. A driving source,
An output shaft that rotates by obtaining torque from the drive source,
A grinding wheel configured as a binder with a flexible material fixed to the output shaft and rotating with the output shaft,
A guide member for guiding the work along a work sliding surface arranged adjacent to the outer peripheral surface of the grinding wheel;
A grinding apparatus having an advance / retreat mechanism configured to arrange the outer peripheral surface of the grinding wheel facing the work sliding surface by relatively moving the grinding wheel and the guide member relatively;
Either a male screw or a female screw is fixed to the guide member as the advance / retreat mechanism, and the other of the male screw or the female screw is fixed to the base side on which the guide member is arranged, and the male screw and the female screw are screwed together. The guide member is configured to advance and retreat in the same direction as the grinding wheel with respect to the base by relative rotation. A grinding device characterized in that biasing means for biasing in a direction is provided. The grinding device according to claim 3, wherein the axial direction of the output shaft and the sliding direction of the work on the work sliding surface of the guide member are arranged so as not to be orthogonal to each other.

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