JPH11179657A - Automatic dressing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically perform uniform and sufficient dressing of an ultra- fine abrasive grain grinding wheel. SOLUTION: An automatic dressing device, in a device main unit 1, is provided with a press means, reciprocating motion means, and a grinding wheel supply means. Of these means, the press means is provided in a press part 10, a dressing grinding wheel D is pressed at a fixed pressure relating to a grinding ultra-fine abrasive grain grinding wheel G. In the reciprocating motion means, by reciprocating a reciprocating member 3 in a vertical direction relating to a base part 2, the dressing grinding wheel D is reciprocatingly slid in a vertical direction relating to the ultra-fine abrasive grain grinding wheel G. The supply means is provided in a columnar main unit 30 of the reciprocating member 3 and a supply part 20, and in lieu of the worn dressing grinding wheel D, a new dressing grinding wheel is automatically supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic dressing apparatus for dressing a superabrasive grinding wheel for grinding with a dressing wheel.

[0002]

2. Description of the Related Art Conventionally, in a dressing apparatus for performing dressing (dressing) on a so-called bond matrix type super-abrasive grindstone, the truing of the super-abrasive grindstone is performed by a single-stone diamond truer or a diamond wheel. (Reshaping) and dressing are performed simultaneously. However, with such a dressing apparatus, it is difficult to perform dressing sufficiently even if truing can be performed.

[0003] Therefore, after the truing and dressing by the dressing apparatus are completed, a general dressing grindstone (WA (white alumina abrasive grain),
In many cases, dressing is performed manually using a GC (green silicon carbide abrasive) grindstone or the like.

[0004]

However, in such manual dressing, uniform dressing of the superabrasive grindstone is difficult, and there is also a problem of fatigue of the operator due to long manual work.

[0005] The present invention has been made in view of the above points, and an object of the present invention is to provide an automatic dressing apparatus capable of automatically and uniformly dressing a superabrasive grindstone. .

[0006]

A first means is an automatic dressing apparatus for dressing a superabrasive grinding wheel for grinding with a dressing whetstone, wherein the dressing whetstone is moved with respect to the superabrasive grinding wheel. Pressing means for pressing at a constant pressure, reciprocating means for reciprocatingly sliding the dressing grindstone with respect to the superabrasive grindstone, and automatically replacing the worn dressing grindstone with a new dressing grindstone. And a grindstone supply means for supplying.

According to the first means, the dressing whetstone is pressed against the superabrasive grindstone by the pressing means at a constant pressure, and the dressing whetstone is reciprocated against the superabrasive whetstone by the reciprocating means. By performing the dressing while moving, uniform and sufficient dressing of the superabrasive grindstone can be automatically performed. Further, the dressing as described above can be automatically continued by automatically supplying a new dressing whetstone instead of the worn dressing whetstone by the whetstone supply means.

[0008] A second means is the first means, wherein a grinding agent supply means for supplying a dressing abrasive to a contact portion between the dressing grindstone and the superabrasive grindstone; And abrasive grain retaining means for retaining free abrasive grains released from the dressing whetstone.

According to the second means, in the first means, the dressing abrasive is supplied to the contact portion between the dressing grindstone and the superabrasive grindstone by the abrasive supplying means, In the portion, the free abrasive grains are retained by the abrasive retaining means, whereby the effect of the dressing of the superabrasive grindstone can be improved.

[0010] A third means is the second means, wherein the staying means is configured to surround the loose abrasive grains by jet air.

A fourth means is the second or third means, further comprising abrasive removal means for removing the free abrasive grains from entering the portion to be ground by the superabrasive grinding wheel.

[0012] According to the fourth means, in the second or third means, the abrasive removal means eliminates the intrusion of free abrasive grains into the portion to be ground by the superabrasive grindstone, whereby the superabrasive is removed. Dressing can also be performed during grinding with a grain grindstone.

A fifth means is that in any one of the first to fourth means, the pressing means is in contact with a grinding wheel chamber holding the dressing whetstone and a rear part of the dressing whetstone in the whetstone chamber. A first pressing plunger, a second pressing plunger disposed behind the first pressing plunger and capable of moving forward in accordance with an amount of wear of the dressing whetstone; and a second pressing plunger and the first pressing plunger. And a spring member interposed therebetween.

A sixth means is the fifth means, wherein the grindstone supply means includes a whetstone transfer section adjacent to the whetstone chamber of the pressing means, and a whetstone transfer section extending from the whetstone transfer section for supplying a new dressing for supply. A whetstone magazine for storing whetstones,
An extrusion plunger for extruding the dressing whetstone in the whetstone magazine to the whetstone transfer unit, and a dressing whetstone extruded by the extrusion plunger to the whetstone transfer unit for transferring the whetstone to the whetstone chamber of the pressing means. And a transfer plunger.

According to a seventh aspect of the present invention, in any one of the first to sixth means, the reciprocating means comprises a reciprocating member including at least the pressing means, and a base for slidably receiving the reciprocating member. A cam device interposed between the base and the reciprocating member, for reciprocating the reciprocating member with respect to the base, and driving means for driving the cam device. is there.

[0016]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 4 show an embodiment of an automatic dressing apparatus according to the present invention.
The automatic dressing apparatus shown in FIGS. 1 to 4 includes a pressing means for pressing a dressing grindstone D against a superabrasive grindstone G for grinding at a constant pressure in the apparatus main body 1, and a superabrasive grindstone for the dressing grindstone D. A reciprocating means for vertically reciprocating sliding with respect to G and a grindstone supply means for automatically supplying a new dressing grindstone in place of the worn dressing grindstone D are provided. The details of these units will be described later.

1 and 2, the super-abrasive grindstone G for grinding is disposed between a workpiece W to be ground and the main body 1 of the automatic dressing apparatus. The superabrasive grindstone G is a bond matrix grindstone formed by bonding abrasive grains with a binder, and here, a disc-shaped grindstone having a tapered shape toward a peripheral portion is used. Further, the superabrasive grinding wheel G is configured to be rotated (in the direction indicated by the arrow in FIG. 1) about an axis substantially orthogonal to the rotation axis of the workpiece W by the rotation axis g.

Further, as shown in FIG. 1, the automatic dressing apparatus 1 applies a contact portion C1 between the dressing grindstone D and the superabrasive grindstone G (from the upstream side in the rotation direction of the superabrasive grindstone G). A) Abrasive supply nozzle (abrasive supply means) 6 for supplying a dressing abrasive, and abrasive retaining means 5 for retaining free abrasive released from the dressing grindstone D at the contact portion C1. I have. here,
The loose abrasive grains are abrasive grains that have fallen off from the dressing grindstone D by pressing and sliding with the dressing grindstone D and the superabrasive grindstone G, and are involved in dressing by shaving off the binder of the superabrasive grindstone G. Things.

The stagnation means 5 surrounds the loose abrasive particles with the air 5a (see FIG. 2) emitted from the air nozzle, and suppresses the flow of the loose abrasive particles mainly to the downstream side in the rotation direction of the superabrasive grindstone G. It is configured to be.

The automatic dressing apparatus further includes an abrasive cleaning device (abrasive removing means) 7 for eliminating the entry of the free abrasive grains into the grinding portion C2 of the workpiece W by the superabrasive grindstone G. I have. This abrasive cleaning device 7
It is arranged between the contact portion C1 and the grinding location C2 along the rotation direction of the superabrasive grindstone G, and is configured to wash away loose abrasive grains with a grinding fluid. FIG.
Reference numeral 8 denotes a grinding fluid supply nozzle for supplying a grinding fluid for grinding to the grinding location C2.

Next, the pressing means will be described in detail mainly with reference to FIG. In FIGS. 2 and 3, a pressing portion 10 for housing a pressing means is provided above a reciprocating member 3 described later. As shown in FIG.
Inside, the pressing means has a grinding wheel chamber 11 for holding a dressing grindstone D having a rectangular parallelepiped shape, and a first pressing plunger 12 in contact with the rear part of the dressing grindstone in the grinding wheel chamber 11. Note that the grinding wheel chamber 11 has an opening 11 for projecting the tip of the dressing grinding wheel D (with respect to the superabrasive grinding wheel G shown in FIG. 1).
a.

The pressing means includes a second pressing plunger 14 disposed behind the first pressing plunger 12,
The second pressing plunger 14 and the first pressing plunger 12
And a coil spring (spring member) interposed therebetween. The first pressing plunger 12 and the second pressing plunger 14 of the pressing means can be moved in the directions indicated by arrows in FIG. 3 by the air pressure supplied from the lines a1 and a2.

Further, the pressing means advances the second pressing plunger 14 in accordance with the amount of wear of the dressing whetstone D in the whetstone chamber 11, whereby the coil spring 1
6 is always kept constant.

Next, the above-mentioned grindstone supply means will be described in detail mainly with reference to FIG. In FIG. 4, the grindstone supply means has a grindstone transfer unit 21 and a grindstone magazine 32. The whetstone transfer unit 21 is formed as a space adjacent to the whetstone chamber 11 of the pressing means and extending laterally from the whetstone chamber 11 in the supply unit 20 provided above the reciprocating member 3. The grindstone magazine 32 extends from the grindstone transfer section 21 into the columnar main body 30 of the reciprocating member 3 and accommodates new dressing grindstones D ′ for supply in a line.

An extruding plunger 34 for pushing up the dressing grindstone D 'in the grindstone magazine 32 to the grindstone transfer section 21 is provided at the bottom of the grindstone magazine 32. The extrusion plunger 34 is connected to the lines a5 and a5.
It can move up and down by the air pressure supplied from 6.

As shown in FIGS. 3 and 4, a dressing grindstone D 'extruded from the grindstone magazine 32 to the grindstone transfer section 21 by the extrusion plunger 34 is provided in the supply section 20 by a grindstone of the pressing means. A transfer plunger 22 for transferring to the chamber 11 is provided. The transfer plunger 22 can be moved in the horizontal direction by the air pressure supplied from the lines a3 and a4.

Here, the supply operation of the new dressing whetstone D 'in the supply means having the above configuration will be described. First, the transfer plunger 22 is moved leftward from the position shown in FIG. 4 (the side opposite to the grinding wheel chamber 11), and the upper part of the grinding wheel magazine 32 is opened. Next, the uppermost dressing grindstone D ′ in the grindstone magazine 32 is pushed up to the grindstone transfer unit 21 by the extrusion plunger 34.

Next, the transfer plunger 22 is moved to the right (toward the grinding wheel chamber 11) in FIG.
The second pressing surface 24 pushes the dressing whetstone D ′ pushed up into the transfer unit 21 into the whetstone chamber 11 of the pressing means (by this stage, the first pressing plunger 12 of the pressing means shown in FIG. It is retracted to open the grinding wheel chamber 11). Then, the new dressing grindstone D ′ pushed into the grindstone chamber 11 is pressed against the superabrasive grindstone G again by the pressing means as shown in FIGS. 1 and 3.

Next, the reciprocating means will be described in detail mainly with reference to FIGS. 3 and 4, the reciprocating means is constituted by a reciprocating member 3 having the pressing portion 10, the transfer portion 20, and the columnar body 30, and a base 2 for slidably receiving the reciprocating member 3. I have. More specifically, the base 2 has a receiving hole 2 that receives the lower portion of the columnar body 30 of the reciprocating member 3 so as to be slidable in the vertical direction.
a.

The reciprocating means is provided between the base 2 and the columnar main body 30 of the reciprocating member 3, and is a cam device 2 for reciprocating the reciprocating member 3 with respect to the base 2 in the vertical direction.
6,36. The cam devices 26, 36 are provided at the base 2 at the bottom of the receiving hole 2 a of the rotary eccentric cam 26, and at the bottom of the columnar main body 30 of the reciprocating member 3, and are provided with roller type cam followers 3 abutting against the eccentric cam 26.
6 is comprised.

A motor (drive means) 4 for rotating the eccentric cam 26 is provided on the side surface of the base 2, and the shaft of the motor 4 and the shaft 28 of the eccentric cam 26 are connected by a shaft joint C. ing. The reciprocating member 3 reciprocates in the vertical direction with the rotation of the eccentric cam 22 by the cam devices 26 and 36 having such a configuration. This allows
The dressing grindstone D held in the grindstone chamber 11 above the reciprocating member 3 reciprocates vertically with respect to the superabrasive grindstone G (see FIG. 2).

Next, the operation and effect of this embodiment having the above-described configuration will be described. In the present embodiment, the pressing means keeps the deflection of the coil spring 16 constant by the movement of the second pressing plunger, as described above, so that the first pressing plunger causes the dressing grindstone D to become the superabrasive grindstone G. On the other hand, a constant pressure is applied. According to this embodiment, the pressing means presses the dressing grindstone D against the superabrasive grindstone G at a constant pressure, and the reciprocating means rotates the dressing grindstone D against the superabrasive grindstone G. By performing dressing while sliding back and forth, uniform and sufficient dressing of the superabrasive grindstone G can be automatically performed. For this reason, the quality of the dressing can be improved, and the operator can be released from fatigue caused by the long dressing operation.

Further, by automatically supplying a new dressing grindstone D 'instead of the worn dressing grindstone D by the grindstone supplying means, the above dressing can be automatically continued.

Further, a dressing abrasive is supplied to a contact portion C1 between the dressing grindstone D and the superabrasive grindstone G by a grinding agent supply nozzle (grinding agent supply means) 6, and at this contact portion C1 The effect of dressing the superabrasive grindstone G can be improved by retaining the free abrasive grains by the abrasive grain retaining means 5.

Further, the abrasive grain cleaning device (abrasive removing means) 7 eliminates the entry of loose abrasive grains into the grinding position C2 by the superabrasive grindstone G, so that the workpiece W by the superabrasive grindstone G is removed. Dressing can also be performed during the grinding process.

[0036]

According to the present invention, the dressing whetstone is pressed against the superabrasive grindstone at a constant pressure by the pressing means, and the dressing whetstone is reciprocally slid against the superabrasive whetstone by the reciprocating means. By performing the dressing while performing, uniform and sufficient dressing of the superabrasive grindstone can be automatically performed. For this reason, the quality of the dressing can be improved, and the operator can be released from fatigue caused by the long dressing operation. Further, by automatically supplying a new dressing grindstone in place of the worn dressing grindstone by the grindstone supply means, the above dressing can be automatically continued.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of an automatic dressing apparatus according to the present invention.

FIG. 2 is a side view of the automatic dressing device shown in FIG. 1 with a part thereof omitted.

FIG. 3 is a sectional view of the automatic dressing apparatus shown in FIG.
Line sectional view.

4 is a sectional view of the automatic dressing apparatus shown in FIG. 2, taken along the line IV-IV.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Base 3 Reciprocating member 4 Motor (drive means) 5 Abrasive retention means 5a Jet air 6 Abrasive supply nozzle (abrasive supply means) 7 Abrasive cleaning device (abrasive removal means) 8 Abrasive fluid supply nozzle DESCRIPTION OF SYMBOLS 10 Press part 11 Grinding-stone chamber 12 1st pressing plunger 14 2nd pressing plunger 16 Coil spring (spring member) 20 Supply part 21 Grinding-stone transfer part 22 Transfer plunger 30 Column-shaped main body of a reciprocating member 32 Grinding-stone magazine 34 Extrusion plunger 26, 36 Cam Equipment C1 Contact area between dressing grindstone and superabrasive grindstone C2 Grinding point (of workpiece) with superabrasive grindstone D, D 'Dressing grindstone G Superabrasive grindstone W Workpiece

Claims (7)

[Claims] 1. An automatic dressing apparatus for dressing a superabrasive grinding wheel for grinding with a grinding wheel for dressing, comprising: pressing means for pressing the dressing wheel against the superabrasive wheel at a constant pressure; Reciprocating means for reciprocatingly sliding the dressing whetstone with respect to the superabrasive whetstone; and whetstone supply means for automatically supplying a new dressing whetstone in place of the worn dressing whetstone. Automatic dressing device characterized by the following. 2. A grinding agent supply means for supplying a dressing abrasive to a contact portion between the dressing grindstone and the superabrasive grindstone, and free abrasive grains released from the dressing grindstone at the contact portion. 2. The automatic dressing apparatus according to claim 1, further comprising an abrasive particle retaining means for retaining the abrasive. 3. The automatic dressing apparatus according to claim 2, wherein said staying means is configured to surround said loose abrasive grains by jet air. 4. The automatic dressing apparatus according to claim 2, further comprising abrasive grain removing means for eliminating the entry of said loose abrasive grains into a portion to be ground by said superabrasive grindstone. 5. The pressing means includes: a whetstone chamber for holding the dressing whetstone; a first pressing plunger abutting on a rear part of the dressing whetstone in the whetstone chamber; and a pressing means disposed behind the first pressing plunger. , The second advanceable in accordance with the amount of wear of the dressing whetstone
The automatic dressing device according to any one of claims 1 to 4, further comprising a pressing plunger, and a spring member interposed between the second pressing plunger and the first pressing plunger. 6. The grinding wheel supply means includes: a grinding wheel transfer unit adjacent to a grinding wheel chamber of the pressing unit; a grinding wheel magazine extending from the grinding wheel transfer unit and storing a new dressing grinding wheel for supply; An extrusion plunger for extruding a dressing whetstone in a magazine to the whetstone transfer unit; and a transfer plunger for transferring the dressing whetstone extruded to the whetstone transfer unit by the extrusion plunger to a whetstone chamber of the pressing means. 6. The automatic dressing device according to claim 5, comprising: 7. The reciprocating means includes: a reciprocating member including at least the pressing means; a base for slidably receiving the reciprocating member; and a base interposed between the base and the reciprocating member. The automatic dressing according to any one of claims 1 to 6, further comprising: a cam device for reciprocating the reciprocating member with respect to the base portion; and driving means for driving the cam device. apparatus.