JP2016097453A - Grinding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinding device which is more compact and cheaper than a conventional one.SOLUTION: In a grinding device 10, a dresser 17 is mounted on a rotary table 11 for moving a workpiece 90 to a space between end surfaces of a pair of grindstones 20, 20, so that it becomes compact and cheap compared to a conventional one which separately includes a mechanism for moving a dresser. Also, the dresser 17 is energized toward an end surface of the grindstone 20 by a pressure spring 18 and can move in the direction separating from the end surface of the grindstone 20, so that even without changing an interval between the end surfaces of the pair of grindstones 20, 20, the dresser 17 can be allowed to enter smoothly from a lateral side between the end surfaces of the pair of grindstones 20, 20.SELECTED DRAWING: Figure 4

Description

  The present invention rotates a rotary table in a state where workpieces are accommodated in a plurality of workpiece accommodation holes penetrating the rotary table, and a workpiece is placed between a pair of rotating grindstones facing each other with a part of the rotary table interposed therebetween. It is related with the grinder which grinds both the end surfaces of these workpiece | work sequentially.

  2. Description of the Related Art Conventionally, as this type of grinding apparatus, there has been known one equipped with a grinding wheel sharpening mechanism for each rotary grinding wheel in order to sharpen the end face of each rotary grinding stone. Each grinding wheel sharpening mechanism is equipped with a dresser at the tip of a linear motion rod that extends on the radial extension line of the rotary grinding stone, and the linear motion rod is moved directly by a motor so that the dresser is moved over the end surface of the rotational grinding stone. (For example, refer to Patent Document 1).

JP 2012-30291 A (paragraph [0021], FIGS. 1 to 3)

  However, the conventional grinding apparatus described above requires a large installation space for the grinding wheel sharpening mechanism to project to the side of the rotating grinding wheel, and requires a motor as a driving source for each grinding wheel sharpening mechanism, which is costly. There was a problem.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a grinding apparatus that is more compact and less expensive than conventional ones.

  In order to achieve the above object, the invention of claim 1 is characterized in that a work is accommodated in a plurality of work accommodation holes penetrating the turntable, the turntable is rotated, and a part of the turntable is sandwiched therebetween. In a grinding apparatus that sequentially passes the workpieces between the end surfaces of a pair of rotating grindstones and grinds both end surfaces of the workpieces, the dresser is accommodated in a dresser accommodation hole penetrating the rotary table and the dresser accommodation hole. A dresser unit, and the dresser unit unitizes a plurality of parts including a dresser for dressing the end face of the rotating grindstone and an elastic member that biases the dresser toward the end face of the rotating grindstone. It is the grinding device characterized by becoming.

  The invention of claim 2 is characterized in that the dresser unit is housed in a cylindrical base with one end-bottomed and the other end open, the elastic member housed in the tubular base, and the tubular base so as to be directly movable. A pair of the dresser units, which are provided in pairs and are urged by the elastic member toward the opening of the cylindrical base and partially projecting from the opening. The unit holding means is provided for holding each dresser unit in an arbitrary linear movement position of the dresser receiving hole. It is a grinding device.

  According to a third aspect of the present invention, the unit holding means includes a fixing female screw hole penetrating from an outer peripheral surface of the rotary table to an inner peripheral surface of each dresser receiving hole, and the fixing female screw hole. The grinding device according to claim 2, further comprising a fixing male screw that is screwed and pressed against the cylindrical base.

  According to a fourth aspect of the present invention, the unit holding means includes a male screw portion formed on the outer peripheral surface of the cylindrical base and a female screw formed on the inner peripheral surface of the dresser receiving hole and screwed into the male screw portion. The grinding device according to claim 2, further comprising a screw portion.

  The invention of claim 5 is characterized in that the dresser unit is formed by fixing the pair of dressers at both ends of a compression coil spring as the elastic member, and is accommodated in the dresser accommodation hole so as to be linearly movable. The grinding apparatus according to claim 1.

  According to a sixth aspect of the present invention, the dresser unit is capable of linearly moving on the cylindrical base with the elastic member housed in the cylindrical base having both ends open and the elastic member interposed therebetween. A pair of dressers accommodated and biased toward the opening of the cylindrical base and partially projecting from the opening, and provided on the cylindrical base, and the pair of dressers are connected to the cylindrical base The grinding apparatus according to claim 1, further comprising a stopper for preventing the slipping in the inside.

  The invention according to claim 7 is the grinding apparatus according to any one of claims 1 to 6, wherein the work accommodation hole is also used as the dresser accommodation hole.

[Invention of Claim 1]
Since the dresser is attached to the rotary table for moving the workpiece between the end faces of the pair of rotating grindstones, the grinding apparatus according to claim 1 is separately compared with the conventional one provided with a mechanism for moving the dresser separately. Compact and inexpensive. In addition, the dresser is urged toward the end face of the rotating grindstone by the elastic member and can move in a direction away from the end face of the rotating grindstone, so even without changing the interval between the end faces of the pair of rotating grindstones, A dresser can be smoothly entered from the side between the end faces of the pair of rotating grindstones. In addition, since a plurality of parts including the dresser and the elastic member are unitized in the dresser unit, it is easy to attach the plurality of parts of the dresser and the elastic member to the rotary table.

[Invention of claim 2]
In the grinding apparatus according to claim 2, since the dresser units are paired and accommodated in the dresser accommodating holes in opposite directions, and each dresser unit can be held at an arbitrary linear movement position of the dresser accommodating hole. Each dresser can be adjusted so as to be pressed with a suitable pressing force.

[Invention of claim 3]
In the grinding device according to claim 3, the fixing male screw is screwed into the fixing female screw hole penetrating from the outer peripheral surface of the rotary table to the inner peripheral surface of the dresser receiving hole, and the cylindrical base in the dresser receiving hole is formed. By pressing against the cylindrical base, the cylindrical base can be easily fixed at an arbitrary linear movement position.

[Invention of claim 4]
In the grinding device according to claim 4, the cylindrical base is easily rotated in the dresser receiving hole by screwing the male screw portion on the outer peripheral surface of the cylindrical base and the female screw portion on the inner peripheral surface of the dresser receiving hole. The dresser unit can be aligned at any linear position.

[Inventions of Claims 5 and 6]
According to the grinding devices of the fifth and sixth aspects, both of the pair of rotating grindstones can be dressed with one linear motion dresser accommodated in the dresser through-hole of the rotary table.

[Invention of Claim 7]
In the grinding apparatus according to the seventh aspect, since the work accommodation hole is also used as the through hole for the dresser, an existing rotary table can be used.

The top view of the rotary table and rotary grindstone of the grinding device of a 1st embodiment of the present invention. Side view of rotary table and rotary grindstone Cross section of rotary table Side view of rotary table Side sectional view of rotary table and rotary grindstone of grinding apparatus of second embodiment Side sectional view of a rotary table and a rotary grindstone of a grinding apparatus according to a third embodiment. Side sectional view of a rotary table according to a modification of the present invention.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a rotary table 11 and a rotary grindstone 20 of the grinding apparatus 10 of the present embodiment. The rotary table 11 has a circular planar shape and is driven to rotate about a rotary shaft extending in the vertical direction. As shown in FIG. 2, a pair of rotating grindstones 20, 20 are provided in a state where a part of the rotary table 11 is opposed to each other in the vertical direction. These rotary grindstones 20 and 20 are coaxially arranged with the same outer diameter, and a gap is provided between each rotary grindstone 20 and the rotary table 11. The rotating grindstones 20 and 20 are rotationally driven in the same direction as the rotary table 11, for example. The upper rotary grindstone 20 is supported so as to be movable up and down, and the interval between the rotary grindstones 20 and 20 can be changed to an arbitrary length.

  As shown in FIG. 1, a plurality of workpiece receiving holes 12 penetrating in the vertical direction are provided in an annular manner at the outer edge of the turntable 11. Then, a compression coil spring is accommodated as a work 90 in these work accommodation holes 12. In addition, a workpiece | work is not limited to a compression coil spring, For example, a cylindrical metal member may be sufficient.

  As shown in FIG. 2, a work bottom support plate 30 is provided below the turntable 11. The work lower end support plate 30 has a circular shape concentric with the rotary table 11 and is disposed so that the upper surface thereof is flush with the upper surface (end surface) of the lower rotating grindstone 20. Further, the work lower end support plate 30 is provided with an arc-shaped cutout portion 30A that is concentric with the rotating grindstone 20 and slightly larger in diameter than the rotating grindstone 20 in order to avoid interference with the lower rotating grindstone 20. ing. The group of workpieces 90 accommodated in the workpiece accommodation hole 12 is supported by the workpiece lower end support board 30 and the upper and lower ends are held in a state of protruding from the workpiece accommodation hole 12. Further, when the rotary table 11 rotates, the lower end portions of the workpieces 90 are brought into sliding contact with the upper surface of the workpiece lower end support plate 30 and guided to the inter-grinding wheel region R1 between the rotating grindstones 20 and 20. Further, a workpiece discharge port (not shown) is formed at a position of the workpiece lower end support plate 30 where the workpiece receiving hole 12 is retracted from the inter-grinding wheel region R1, and the inter-grinding wheel region is stored in the workpiece receiving hole 12. The workpiece 90 that has passed through R1 is discharged downward from the workpiece discharge port.

  As shown in FIG. 1, the rotary table 11 is provided with a pair of dresser accommodation holes 13, 13 side by side instead of a part of the plurality of workpiece accommodation holes 12 arranged on the outer edge. The dresser accommodation hole 13 penetrates the rotary table 11 up and down like the workpiece accommodation hole 12, and the inner diameter of the dresser accommodation hole 13 is slightly larger than the inner diameter of the workpiece accommodation hole 12. As shown in FIG. 4, a female screw portion 13 </ b> N is formed on the inner surface of the dresser accommodation hole 13. Furthermore, as shown in FIG. 3, the fixing female screw is provided at an intermediate position in the axial direction of the dresser receiving hole 13 so as to penetrate between the outer peripheral surface of the rotary table 11 and the inner peripheral surface of the dresser receiving hole 13. A hole 14 is formed.

  As shown in FIG. 4, a dresser unit 15 is attached to each dresser accommodation hole 13. The dresser unit 15 is formed by assembling a dresser 17 and a pressure spring 18 (specifically, a compression coil spring) as an “elastic member” of the present invention to a cylindrical base 16. The cylindrical base 16 is formed by screwing a disk-shaped lid 16B to one end of a cylindrical body 16A that is open at both ends. Further, a locking projection 16D protrudes from the inner peripheral surface of the end portion on the open port 16C side of the cylindrical body 16A, and the inner diameter of the cylindrical body 16A is reduced in a stepped shape on the open port 16C side.

  A male screw portion 16N is formed on the outer peripheral surface of the cylindrical body 16A. The male screw portion 16N and the female screw portion 13N of the dresser accommodating hole 13 are screwed together so that the cylindrical base 16 is held at an arbitrary position in the linear movement direction of the dresser accommodating hole 13. Further, for example, a hexagonal hole 16E is formed in the center of the outer surface of the lid 16B, and a screwing operation can be easily performed by rotating the cylindrical base 16 by inserting a hexagon wrench therein.

  A dresser 17 and a pressure spring 18 are sequentially inserted into the cylindrical body 16A from an opening closed by the lid body 16B, and are prevented from being detached by the lid body 16B. The dresser 17 has a structure in which a circular flange 17B projects from the rear end portion of the cylindrical portion 17A. Further, the pressure spring 18 is stretched between the dresser 17 and the lid body 16B to urge the dresser 17 toward the opening 16C. Normally, the circular flange 17B comes into contact with the locking projection 16D of the cylindrical body 16A from the inside, and the columnar portion 17A protrudes outward from the opening 16C. Further, the tip of the cylindrical portion 17A is a dresser body 17H, and is composed of, for example, a grindstone.

  As shown in FIG. 4, dresser units 15 and 15 are attached to the dresser receiving holes 13 and 13 so as to be opposite to each other. Then, the dresser 17 facing downward comes into contact with the end face of the lower rotating grindstone 20, the circular flange 17B is slightly separated from the locking projection 16D, and the dresser 17 facing upward is rotated upward. The position of each dresser unit 15 is adjusted in the dresser accommodation hole 13 such that the circular flange 17B is slightly separated from the locking projection 16D in contact with the end face of the grindstone 20. As shown in FIG. 3, the fixing male screw 14 </ b> A screwed into the fixing female screw hole 14 is pressed against the dresser unit 15, so that the dresser unit 15 is fixed so that it cannot rotate and move linearly.

  This completes the description of the configuration of the grinding apparatus 10 of the present embodiment. Next, the effect of this grinding apparatus 10 is demonstrated. When the grinding apparatus 10 of the present embodiment is activated, the rotary grindstones 20 and 20 and the rotary table 11 are rotationally driven, and a workpiece feeder (not shown) is operated in synchronization with them, and the workpiece is accommodated before entering the region R1 between the grindstones. The workpiece 90 is supplied to the hole 12. And the workpiece | work 90 accommodated in the workpiece | work accommodation hole 12 approachs to the area | region R1 between grindstones between the rotary grindstones 20 and 20, and it grinds so that the both ends of the workpiece | work 90 may become a flat surface.

  Here, each time the turntable 11 makes one rotation, a pair of dresser units 15 and 15 enter between the rotating grindstones 20 and 20. Then, as shown in FIG. 4, the dresser 17 of one dresser unit 15 is pressed against the end surface of the upper rotating grindstone 20 by the elastic force of the pressure spring 18, while the dresser 17 of the other dresser unit 15 is on the lower side. The rotary grindstone 20 is pressed against the end face of the rotary grindstone 20 by the elastic force of the pressure spring 18 to dress the rotary grindstones 20, 20. Thereby, the grinding function of the rotary grindstones 20 and 20 is maintained in a good state, and the grinding quality for the workpiece 90 is stabilized.

  And since the dresser 17 is attached to the rotary table 11 for moving the workpiece | work 90 between the end surfaces of a pair of rotary grindstones 20 and 20, the grinding apparatus 10 of this embodiment moves a dresser separately. Compared to the conventional one with a mechanism, it is compact and inexpensive. Further, the dresser 17 is biased toward the end face of the rotating grindstone 20 by the pressure spring 18 and can move in a direction away from the end face of the rotating grindstone 20, so that the end faces of the pair of rotating grindstones 20, 20 Even without changing the interval, the dresser 17 can smoothly enter between the end faces of the pair of rotating grindstones 20 and 20 from the side. In addition, since a plurality of parts including the dresser 17 and the pressure spring 18 are unitized in the dresser unit 15, it is easy to attach the plurality of parts such as the dresser 17 and the pressure spring 18 to the turntable 11. . Further, since the dresser units 15 are paired and attached to each other in opposite directions, the parts can be shared between the dresser units 15 and 15. Further, the female screw part 13N in the dresser receiving hole 13 and the male screw part 16N of the dresser unit 15 can be screwed together to rotate the dresser unit 15 and change its linear motion position. The pressing force with respect to each of the 17 rotating grindstones 20 can be adjusted to a suitable magnitude.

[Second Embodiment]
In the grinding apparatus 10 of the first embodiment, the dresser accommodation hole 13 (see FIG. 1) is formed in the rotary table 11 separately from the work accommodation hole 12, but as shown in FIG. In the apparatus 10X, the dresser accommodation hole 13 is not formed in the rotary table 11X, but the dresser unit 40 is accommodated in any work accommodation hole 12 in place of the work 90 so as to be able to move directly, and the rotary grindstones 20 and 20 are dressed. It has become. The dresser unit 40 is formed by fixing a pair of dressers 42 and 42 to both ends of a compression coil spring 41. Specifically, each dresser 42 has a dresser body 42H on the front side surface of the disc body 42A, and a columnar fitting protrusion 42B at the center of the back side surface. And the fitting protrusion 42B of each dresser 42 is press-fitted and fixed to each end of the compression coil spring 41. The dresser body 42 </ b> H is made of, for example, ceramics and has a plurality of protrusions that protrude toward the rotating grindstone 20.

  According to the configuration of the present embodiment, both the pair of rotating grindstones 20 and 20 can be dressed by one dresser unit 40 accommodated in the workpiece accommodating hole 12. Moreover, since the workpiece accommodation hole 12 is also used as the accommodation hole of the dresser unit 40, the existing rotary table 11X can be used.

  The dresser unit 40 is discharged downward from a workpiece discharge port (not shown) formed in the workpiece lower end support plate 30, similarly to the workpiece 90. In addition, a sorting lever is provided below the workpiece discharge port, and when the dresser unit 40 is discharged from the workpiece discharge port, the sorting lever is operated so that the dresser unit 40 is different from the collection box of the workpiece 90. You may make it collect | recover.

[Third Embodiment]
The dresser unit 40Y of the grinding apparatus 10Y of this embodiment is shown in FIG. 6, and can be said to include a pair of dressers 42Y and 42Y accommodated in a cylindrical base 52 open at both ends. Each dresser 42Y has a structure in which a dresser main body 42H is provided on the distal end surface of the cylindrical portion 42C, and a flange 42D protrudes laterally from the base end portion of the cylindrical portion 42C. The dressers 42Y and 42Y are accommodated in the cylindrical base 52 so as to be able to move directly with the flange 42D facing each other, and the stopper 53 protruding inward from the opening end of the cylindrical base 52 contacts the flange 42D. Accordingly, each dresser 42 </ b> Y is prevented from being detached from the cylindrical base 52 in a state where the tip end side of the cylindrical portion 42 </ b> C protrudes from the cylindrical base 52.

  A plurality of disc springs 41Y are accommodated between the pair of dressers 42Y and 42Y, and are biased so that the stopper 53 and the flange 42D are brought into contact with each other. Further, an intermediate plate 50 is provided at a position that is the center of the plate spring 41Y group in the arrangement direction, and stopper protrusions 51 and 51 protrude from the front and back of the intermediate plate 50. When the disc spring 41Y group is bent by a predetermined amount or more, both the dressers 42Y and 42Y come into contact with the stopper protrusion 51.

  The configuration of this embodiment also provides the same effects as those of the second embodiment. In addition, it may replace with the disc spring 41Y in the dresser unit 40Y of this embodiment, and a compression coil spring may be accommodated between the dressers 42Y and 42Y.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and can be implemented with various modifications other than those described above without departing from the scope of the invention.

(1) Although the turntables 11 and 11X of the first to third embodiments are plate-like with a uniform thickness, like the turntable 11V of the grinding apparatus 10V shown in FIG. A structure in which a plurality of through holes 11F are formed in the outer edge portion of the disk 11E and the cylindrical body 11T is penetrated through the through holes 11F may be used. The inside of the cylindrical body 11T or the inside of a cylindrical body having a diameter different from that of the cylindrical body 11T for accommodating a workpiece may be used as the “dresser accommodating hole” according to the present invention.

(2) In the first embodiment, the pair of dresser units 15 and 15 are separately attached to the two dresser receiving holes 13 and 13, but, for example, a pair of dresser units 15 and 13 are back-to-back in a common dresser receiving hole. The dresser unit may be accommodated, and the dresser unit may be fixed in the dresser accommodation hole only by the fixing female screw hole 14 and the fixing male screw 14A.

(3) Further, in the dresser unit 15 of the first embodiment, one dresser 17 and one pressure spring 18 are accommodated in the cylindrical base 16 having one end bottomed and the other end open. A pair of dressers may be housed in a cylindrical base with a pressurizing spring interposed therebetween, and may be housed in a dresser housing hole or a work housing hole so as to be directly movable.

10, 10V, 10X, 10Y Grinding device 11, 11V, 11X Rotary table 12 Work receiving hole 13 Dresser receiving hole 13N Female screw part 14 Fixing female screw hole 14A Fixing male screw 15, 40, 40Y Dresser unit 16, 52 Tube Shape base 17, 42, 42Y Dresser 18 Pressure spring (elastic member)
20 Rotating grindstone 41 Compression coil spring (elastic member)
41Y disc spring (elastic member)
90 workpieces

Claims (7)

The work is accommodated in a plurality of work accommodation holes penetrating the turntable, the turntable is rotated, and the work is sequentially passed between end faces of a pair of rotating grindstones facing each other with a part of the turntable interposed therebetween. In a grinding device that grinds both end faces of these workpieces,
A dresser receiving hole penetrating the rotary table;
A dresser unit housed in the dresser housing hole,
The dresser unit is formed by unitizing a plurality of parts including a dresser for dressing an end face of the rotating grindstone and an elastic member for urging the dresser toward the end face of the rotating grindstone. Grinding equipment. The dresser unit includes a cylindrical base with one end bottomed and an open end at the other end, the elastic member accommodated in the cylindrical base, and a cylinder base that is directly movable. The dresser is biased toward the opening of the base and partly protrudes from the opening, and is provided in a pair.
The pair of dresser units are accommodated in the dresser accommodation holes in opposite directions, and unit holding means for holding each of the dresser units at an arbitrary linear movement position of the dresser accommodation hole is provided. The grinding apparatus according to claim 1.   The unit holding means is screwed into the fixing female screw hole formed through the outer peripheral surface of the rotary table from the outer peripheral surface of the dresser receiving hole and the fixing female screw hole, and the cylindrical shape The grinding apparatus according to claim 2, further comprising a fixing male screw pressed against the base.   The unit holding means includes a male screw part formed on the outer peripheral surface of the cylindrical base and a female screw part formed on the inner peripheral surface of the dresser receiving hole and screwed into the male screw part. The grinding apparatus according to claim 2 or 3, wherein   The said dresser unit is formed by fixing the pair of dressers at both ends of a compression coil spring as the elastic member, and is accommodated in the dresser accommodation hole so as to be capable of linear movement. Grinding equipment. The dresser unit is
A cylindrical base with open ends,
The elastic member housed in the cylindrical base;
A pair of dressers that are accommodated in the cylindrical base so as to be movable in a state of sandwiching the elastic member, are urged toward the opening side of the cylindrical base, and a part of the dresser protrudes from the opening;
The grinding apparatus according to claim 1, further comprising a stopper provided on the cylindrical base and configured to prevent the pair of dressers from falling into the cylindrical base.   The grinding apparatus according to any one of claims 1 to 6, wherein the work accommodation hole is also used as the dresser accommodation hole.

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