JP3971980B2 - Grinding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grinding apparatus for grinding a metal workpiece.
[0002]
[Prior art]
Conventionally, corner chamfering of a metal workpiece has been performed by a rotating grinding wheel. However, in the normal chamfering process, the chamfered part is eventually given a new angle, so the entire corner part is smoothly curved, so-called “R (R) (hereinafter referred to as R process)”. Smooth chamfering like this is desirable.
[0003]
[Problems to be solved by the invention]
However, it is not always easy to subject the corners to rounding, and a conventional grinding apparatus using a grinding wheel takes skill and processing time, and cannot be easily performed.
The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a grinding apparatus capable of easily performing smooth chamfering.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the first aspect of the present invention, a drive source, an output shaft that rotates by obtaining rotational force from the drive source, and a flexible material that is fixed to the output shaft and rotates together with the output shaft. A grinding wheel configured as a binder, a guide member for guiding a workpiece along a workpiece sliding surface disposed adjacent to the outer peripheral surface of the grinding wheel, and the grinding wheel and the guide member relative to each other In the grinding apparatus provided with an advance / retreat mechanism in which the outer peripheral surface of the grinding wheel is arranged to face the work sliding surface by moving forward and backward, the guide member has either a male screw or a female screw as the advance / retreat mechanism. And either the male screw or the female screw is fixed to the base side on which the guide member is disposed, and the guide member is mounted on the base by the relative rotation of the screwed male screw and female screw. Configured to move forward and backward Rutotomoni, between the same external thread and the internal thread 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.
If comprised in this way, an advancing / retreating mechanism will be driven, a guide member will be made to approach a grinding wheel direction, and a guide member will be arrange | positioned so that the outer peripheral surface of a grinding wheel and the workpiece | work sliding surface may face. Then, the work sliding surface is slid to grind the work by the outer peripheral surface of the grinding wheel. Since the grinding wheel is composed of a flexible material as a binder, when the corner portion of the workpiece comes into contact with the grinding wheel, it is bent by the pressing force and wraps around the corner portion of the workpiece. Then, the corner | angular part of a workpiece | work will be ground by the cross-section circular arc shape similarly by the curved cross-section circular arc-shaped inner surface of the grinding wheel. At this time, the guide member is advanced and retracted with reference to the base by the relative rotation of the screwed male screw and female screw. In such advancement and retraction due to the rotation of the screw, a slight rattling occurs when the screw is reversed due to screw tolerance. However, in this way because it urges both screws in opposite directions by a biasing means such backlash can be eliminated becomes Rukoto.
[0005]
According to a second aspect of the present invention, in the configuration of the first aspect of the invention, the axial direction of the output shaft and the sliding direction of the workpiece on the workpiece sliding surface of the guide member are arranged so as not to be orthogonal to each other. This is the gist.
Accordingly, in addition to the operation of the first aspect, when the corner portion of the workpiece is ground by the outer peripheral surface of the grinding wheel, the corner portion of the workpiece is in wide contact with the outer peripheral surface of the grinding wheel, so that the grinding wheel can be reduced. Is prevented.
The gist of the invention of claim 3 is that, in the configuration of the invention of claim 1 or 2, 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.
In the invention of claim 4, in the configuration of the invention in any one of claims 1 to 3, wherein the guide member is composed of two flat plates, the flat outer peripheral surface of the grinding wheel is arranged in intersection difference shape The gist is that the plate is exposed at the crossing line position.
[0008]
【The invention's effect】
It becomes possible to perform easily smooth chamfering it becomes possible to perform easily smooth chamfering the invention of the above claims, is based on the tolerance of the screw when allowed to advance and retreat the guide member The rattling is eliminated and the guide member can be accurately positioned quickly.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. In the following description, “front” refers to the downward direction in FIG. 3, and “rear” refers to the upward direction in FIG.
As shown in FIG. 1, FIG. 3, and the like, a geared motor 5 is disposed on the first gantry 4 on the base 3 of the grinding apparatus 1. The geared motor 5 is composed of a single-phase AC induction motor and a speed reduction mechanism. The first output shaft 6 is exposed rearward. A bearing block 7 is disposed on the second frame 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 supported rotatably by a bearing 9 of the 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 rotational force 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-shape T shape by a bolt 14 so as to be 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 with silicone rubber as a flexible material as a binder.
[0010]
A main plate 15 is disposed at a front position of the base 3 and adjacent to the second frame 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 is It is arranged in front of the main plate 15.
The main plate 15 is a rectangular steel plate, and is fixed to the second frame 8 and the base 3 by bolts (not shown). A steel bracket 17 is fixed to the lower position on the front side of the main plate 15 with bolts 18. As shown in FIG. 4, the bracket 17 is formed with a table portion 19 that is cantilevered forward from the main plate 15. A dial knob 20 is disposed on the table portion 19. As shown in FIG. 8, the dial knob 20 includes a dial portion 20a to which a scale plate G is attached and a female screw collar 20b provided upright at the center of the dial portion 20a. A female screw 22 is screwed on the inner peripheral surface of the female screw collar 20b. As shown in FIGS. 2 and 4, the female thread collar 20 b is arranged in a state of being inserted from below into a through hole 23 formed in the center of the table portion 19. A switch 21 is disposed on the right side of the dial knob 20.
[0011]
A slide base 25 is fixed to the main plate 15 with bolts (not shown). As shown in FIGS. 1 and 5, the slide base 25 is a front upper position of the main plate 15, and intersects the grinding wheel 13 in a planar arrangement state as shown in FIG. 3. An arc-shaped cutout 27 corresponding to the outer shape of the grinding wheel 13 is formed on 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 in the front right side of the slide base 25.
A slide 33 is disposed on the front surface of the slide base 25. The slide 33 is supported by the front surface 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 a reverse H-shaped steel frame, and a male screw 35 is formed on the lower surface of the center. 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 the rattling caused by the tolerance generated between the male screw 35 and the female screw 22 in opposite directions.
[0012]
A work guide plate 37 as a guide member is fixed to the upper end of the slide 33 by a bolt 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 90 degrees perpendicular to each other. A long hole-shaped through hole 39 is formed.
The upper surface of the workpiece guide plate 37 is a slide surface 37a that moves while the workpiece slides. The slide surface 37a is a carbide sprayed surface formed by subjecting an alloy made of Wc (tungsten), Co (cobalt), Ni (nickel), and Cr (chrome) to flame spraying, followed by surface grinding.
In the present embodiment, a straight line appearing on the slide surface 37a by intersecting two rectangular plates is defined as an intersection line L. A recess 40 is formed on the back side of the work guide plate 37 at the same through hole 39 position. 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, in the planar arrangement state, the second output shaft 10 is arranged at an angle of about 60 degrees 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 with 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 on the lower right side of the slide 33. The elongated hole 41 is in a positional relationship in which the screw hole 31 formed in the front surface of the rear slide base 25 is exposed in the arrangement state of the slide 33. 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 through the long hole 41. The lock lever 43 is configured to move forward and backward by rotating the male screw 43 a by operating the lever main body 43 b, and is configured such that the rear end surface 44 of the lever main body 43 b abuts on the periphery of the long hole 41 of the slide 33 by moving forward. Then, the slide 33 is pressed against the slide base 25 by the rear end face 44 to lock the slide 33 so that it cannot slide.
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. Both covers 45 and 46 are shown only in FIG. In the present embodiment, the description of the power feeding unit to the geared motor 5 is omitted.
[0014]
Next, the operation of the grinding apparatus 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 slid in the vertical direction little by little by the screwed 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 phantom line position shown in FIG. 7, and in this state, the slide 33 is in an 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 37 a of the work guide plate 37. Since the actual grinding position needs to be slightly lower than this, the grinding wheel 13 is rotated in the reverse direction by rotating the dial portion 20a in a state in which the grinding wheel 13 is abutted (although it is not always necessary to contact the grinding wheel 13). 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 bring the slide 33 into the locked state.
Next, the switch 21 is input. Then, the geared motor 5 is driven, and 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 so that the grinding wheel 13 can be ground.
For example, consider the case of chamfering a rectangular parallelepiped workpiece W made of aluminum alloy shown in FIG. As shown in FIG. 9, the workpiece guide plate 37 is set on the slide surface 37 a so that the corners of the workpiece W to be processed are arranged 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 portion of the workpiece W abuts during grinding, the grinding wheel 13 is bent by the pressing force and wraps around the corner portion of the workpiece W. Then, the corner | angular part of the workpiece | work W will be similarly ground by the cross-section circular arc shape by the curved cross-section circular arc-shaped inner surface of the grinding wheel.
[0016]
With this configuration, the following effects are achieved in the above embodiment.
(1) Conventionally, it has been expensive to perform rounding in chamfering a workpiece because it takes skill and time. However, since the grinding wheel 13 is flexible when configured as described above, the corner portion of the work W is specially ground to the same arc shape by the inner surface of the grinding wheel which is bent. Skill is not required and the grinding time can be significantly reduced, which contributes to cost reduction.
Moreover, the finish is beautiful without the occurrence of burrs due to grinding as in the conventional chamfering.
(2) By rotating the dial portion 20 a of the dial knob 20, the slide 33 can be moved up and down to adjust the position of the work guide plate 37. Therefore, it is possible to easily adjust the positions of the work guide plate 37 and the grinding wheel 13 so as to satisfy 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 through the through hole 39 to the intersecting line L portion of the slide surface 37a, the work W along the longitudinal direction of the slide surface 37a. Since it is possible to perform a rounding process along the corners simply by sliding, it is possible to realize an extremely accurate and smooth machining without any deviation.
[0017]
(4) In general, in a mechanism that advances and retracts one by the screwed relationship between the male screw and the female screw, there is rattling based on the tolerance between the male screw and the female screw, so it was planned to reversely rotate from the normal rotation state. The advancing / retreating action due to the rattling will occur more than the advancing / retreating amount. In other words, the amount of advance was lacking in accuracy. In order to solve this problem, it is necessary to perform a reverse rotation and then a normal rotation again.
However, in the present embodiment, the male screw 35 and the female screw 22 are urged in the opposite directions by the coil spring 36. Therefore, even if the reverse rotation is performed from the normal rotation state, the contact surface between the male screw 35 and the female screw 22 is always in one direction only by this urging force, so that no rattling occurs. Therefore, the operation can be performed simply by rotating forward and reverse, 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 traveling direction of the workpiece W are deviated, the corner portion of the workpiece W is in wide contact with the outer peripheral surface of the grinding wheel 13 and the grinding wheel is prevented from being 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 surface ground, the slide surface 37a is very difficult 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, it does not easily wear out even when the workpiece W slides on the slide surface 37a, and it is difficult to cause a problem that the size of the slide surface 37a is worn and worn out with age. Furthermore, since the slide surface 37a is smoothly ground, it can be smoothly slid without being caught when the work W is slid (so-called knocking phenomenon hardly occurs).
[0018]
It should be noted that the present invention can be modified and embodied as follows.
In the above embodiment, the coil spring 36 is used as the biasing means, but other biasing means may be used.
-It is composed of two plane plates orthogonal to each other like the work guide plate 37, and has a suitable shape for sliding and grinding the work W having the right angle corner as described above. It is free to change the shape of the work guide plate 37 according to the work. The presence or absence of the formation of the carbide sprayed surface is also free.
In the above embodiment, the geared motor 5 and the bearing block 7 are disposed adjacent to each other, but the grinding wheel 13 may be directly fixed to the first output shaft 6.
A dust collector may be provided in the grinding device 1.
A workpiece other than metal, for example, stone, wood, plastic, glass, or the like may be used as a workpiece other than the workpiece W.
A motor other than the above may be used as the geared motor 5.
. In addition, it is free to implement in a mode that does not depart from the spirit of the present invention.
[0019]
Other technical ideas that can be grasped from the above-described embodiments in order to achieve the object of the present invention will be described below as additional notes.
(1) The grinding apparatus according to any one of claims 1 to 4, wherein the guide member is composed of two orthogonal flat plates.
(2) The grinding apparatus according to any one of claims 1 to 4 or appendix 1, 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 the position of the intersecting line of the two flat plates arranged in the intersecting manner, according to any one of claims 1 to 4 or appendix 1 or 2. Grinding equipment.
[0020]
[Brief description of the drawings]
FIG. 1 is a perspective view of a grinding apparatus according to an embodiment of the present invention.
FIG. 2 is a partial sectional front view of the same grinding apparatus.
FIG. 3 is a plan view of the same grinding apparatus.
FIG. 4 is a partial cross-sectional side view of the same grinding apparatus.
FIG. 5 is an exploded perspective view of the same grinding apparatus.
6A is a front view, FIG. 6B is a plan view, and FIG. 6C is a side sectional view of the workpiece guide plate.
FIG. 7 is a partially enlarged front view illustrating the operating state of the same grinding apparatus.
FIG. 8 is a perspective view of a dial knob.
FIG. 9 is an explanatory diagram for explaining the positional relationship between the workpiece and the grinding wheel on the workpiece guide plate.
FIG. 10 is a perspective view of a workpiece.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 5 ... Geared motor as drive source, 10 ... 2nd output shaft as output shaft, 13 ... Grinding wheel, 17 ... Bracket which forms a part of advance / retreat mechanism, 20 ... Dial knob which forms a part of advance / retreat mechanism, 22 ... Female screw, 25 ... slide base forming part of the advance / retreat mechanism, 29 ... guide forming part of the advance / retreat mechanism, 33 ... slide forming part of the advance / retreat mechanism, 35 ... male screw, 36 ... coil spring as urging means, 37: Work guide plate as a guide member, 37a: Slide surface as a work slide surface.

Claims (4)

A driving source;
An output shaft that rotates by obtaining rotational force from the drive source;
A grinding wheel configured with a flexible material fixed to the output shaft and rotating together with the output shaft as a binder;
A guide member for guiding the workpiece along a workpiece sliding surface disposed adjacent to the outer peripheral surface of the grinding wheel;
In a grinding apparatus provided with an advancing / retracting mechanism in which the outer peripheral surface of the grinding wheel is arranged to face the workpiece sliding surface by relatively moving the grinding wheel and the guide member forward and backward,
As the advance / retreat mechanism, either a male screw or a female screw is fixed to the guide member, and either the male screw or the female screw is fixed to the base side on which the guide member is disposed. The guide member is configured to move back and forth in the direction of the grinding wheel with reference to the base by relative rotation, and the screws are opposite to each other along the axial direction of the screws. A grinding apparatus characterized in that a biasing means for biasing in a direction is disposed. 2. The grinding apparatus according to claim 1, wherein the axial direction of the output shaft and the sliding direction of the workpiece on the workpiece sliding surface of the guide member are arranged so as not to be orthogonal to each other. The grinding apparatus according to claim 1 or 2, wherein an outer peripheral surface of the grinding wheel is exposed from a back surface side of the guide member to a slide surface on the front surface side. The guide member is composed of two flat plates, one of claims 1 to 3 the outer peripheral surface of the grinding wheel, characterized in that it is exposed to intersecting line position in the same plane plate disposed intersection difference shape Crab grinding device

Images