KR101478048B1 - A electrolytic in-process dressing grinder for grinding knife - Google Patents

Abstract

The present invention relates to an electrolytic in-process dressing grinder to grind a knife which enables an efficient supply of a grinding lubricant, and continuously maintains dressing effects by uniformly supplying the grinding lubricant to the gap between a grinding wheel and an electrode through the electrode; and preventing metal residue generated during a grinding process and residue generated through ionization from flowing into the supply path of the electrode where the grinding lubricant is supplied. The electrolytic in-process dressing grinder to grind a knife comprises: a moving plate; a slider; a grinding unit composed of a support bracket placed on the moving plate, a grinding head having a grinding wheel having a ring-shaped grinding tip to grind a knife on the front surface, and a position fixating unit formed on the support bracket to lift and rotate the grinding head around an x-axis; and a grinding lubricant supply unit arranged apart from the grinding tip, and supplies the conductive grinding lubricant to the gap with the grinding tip.

Description

[0001] The present invention relates to an electrolytic in-process dressing grinder for grinding for knife grinding,

The present invention relates to a grinding apparatus used in a grinding process of a knife, and more particularly, to a grinding apparatus which is capable of uniformly supplying a grinding liquid to a gap between a grinding wheel and an electrode through an electrode, To the supply passage of the electrode to which the grinding liquid is supplied, thereby enabling the supply of the grinding liquid and the effect of the dressing to be continuously maintained. BACKGROUND OF THE INVENTION [0002] .

In general, a grinding process is performed to improve the mirror-surface processing and precision of a metal workpiece during precision machining.

At this time, the grinding tip used in the grinding process has a low degree of surface accuracy and accuracy because the grinding tip of the grinding tip is lowered as the metal debris separated from the workpiece is caught or buried between the grinding tip particles as the grinding operation continues Causing problems.

In this case, metal debris from the workpiece stuck to or attached to the grinding tip and the metal bond of the grinding wheel are removed to perform a dressing operation to protrude the abrasive grains.

This is because, when a snow-filling phenomenon occurs in which metal debris is caught between the abrasive grains in the grinding process during the grinding process, the surface accuracy of the workpiece is lowered as well as the grinding efficiency is lowered due to the snow- This is because deformation of the workpiece can occur and the projecting height of the abrasive grains is reduced by the metal bond serving as a binder for maintaining the abrasive grappling force.

The grinding tip and the electrode are disposed opposite to each other at regular intervals to apply a voltage to the grinding tip and the electrode and to supply a conductive grinding fluid serving as an electrolyte between the grinding tip and the electrode, (ELID, Electrolytic in-process Dressing) method is disclosed in Korean Patent Laid-Open Publication No. 1995-0005458, in which a metal bond for grinding and a metal residue existing on the surface of a grinding wheel are oxidized and separated.

The basic structure of the electrolytic process dressing grinding apparatus is composed of a grinding wheel H and an electrode E opposed to the grinding wheel H with a certain gap therebetween, The grinding wheel H and the electrode E are connected to the power supply unit P. The grinding wheel H and the electrode E are connected to the power supply unit P by a nozzle L for supplying the conductive grinding liquid to the gap between the grinding wheel H and the grinding wheel H,

That is, the mechanism of electrolytic process dressing is such that when a power is applied to a grinding wheel as an anode and an electrode as a cathode and a conductive grinding liquid serving as an electrolyte is supplied between the grinding wheel and the electrode, the metals present on the grinding wheel, The metal ions acting as a binder of the grinding tip or chips generated from the metal workpiece during grinding are ionized so that the metal ions combine with oxygen ions at the anode to form a metal oxide to form an oxide film, If removed, the abrasive grain will protrude and again the ionization of the binder metals in the grinding tip will be repeated.

However, in the electrolytic process dressing grinding apparatus, since the grinding liquid supplied to the gap between the grinding wheel and the electrode is supplied from the outside through the nozzle provided on the upper side as shown in Fig. 1, There is a problem that it is difficult to supply uniformly.

In this case, since the ionization is not properly performed, the abrasive protrusion of the abrasive tip becomes dull and the grinding performance is deteriorated and the grinding process is performed for a long time. In case of grinding the knife requiring a high precision, Chipping occurs on the surface of the blade or a serious problem is caused in the straightness of the blade tip.

2, a grinding liquid supply path is formed in the electrode to supply the grinding liquid directly to the gap between the grinding wheel and the electrode. However, The grinding liquid can not be supplied smoothly as the metal debris generated in the process continues to flow into the grinding liquid supply path and is accumulated. In addition, since the accumulation of the metal oxide reduces the amount of current from the electrode to the grinding tip, There is a problem.

Japanese Unexamined Patent Application Publication No. 2002-273644 discloses a grinding apparatus for grinding a knife by contacting a grinding wheel with a knife while moving the grinding wheel in a forward and backward direction using a sensor means.

However, it can be confirmed that the above-described grinding apparatus does not have a structure or apparatus for supplying the grinding liquid supplied as a gap at the time of grinding the knife, and further it is not an electrolytic process dressing system.

Further, since the grinding wheel has a structure in which the grinding wheel can move only in the forward and backward directions in a state where the grinding wheel is mounted at a predetermined angle, there is a problem in that it is difficult to immediately respond to the grinding of the knife having various heights and accordingly the adjustment of the angle of the grinding wheel .

- Patent Document 1: Korean Published Patent Application No. 1995-0005458 (published on Mar. 20, 1995) - Patent Document 2: Japanese Unexamined Patent Application Publication No. 2002-273644 (published on September 25, 2002) - Patent Document 3: Korean Published Patent Application No. 1999-0062615 (published on July 26, 1999) - Patent Document 4: Korean Patent Laid-Open Publication No. 2001-0089212 (published on September 29, 2001)

DISCLOSURE Technical Problem The present invention has been devised in order to solve the above-mentioned conventional problems and technical prejudices, and it is an object of the present invention to provide a grinding machine capable of setting various angles of a grinding wheel and raising and lowering the grinding wheel and grinding oxide particles and the like, And an object of the present invention is to provide an electrolytic process dressing grinding apparatus for knife grinding that prevents the supply of the liquid to the supply flow path of the electrode to which the liquid is supplied so that the effect of smooth supply and dressing of the grinding liquid can be maintained.

According to another aspect of the present invention, there is provided an electrolytic dressing grinding apparatus for knife grinding, which grinds a cutting edge of a knife, the apparatus comprising: A moving plate moving in the Y-axis direction; A slider disposed to face the moving plate and moving in the X-axis direction with the knife vertically chucked; A supporting bracket that is seated on the moving plate and has a pair of vertical pieces protruding from an upper surface of the moving plate in a state where the front plate and the rear plate are opened; A grinding head having a cup-shaped grinding wheel having a ring-shaped grinding tip for grinding a knife, the grinding head having a cup-type grinding wheel disposed on the front surface thereof; The grinding unit comprising: And a grinding tool which is fixed to the grinding head together with the electrode in a state of being adjacent to the electrode and is supplied with the conductive grinding liquid through the electrode and supplied to the gap, And a grinding liquid supply cover for supplying the grinding liquid supply cover.

At this time, a curved first diffusing flow path corresponding to a part of the grinding tip is formed on one surface of the grinding liquid supply cover so that the injected grinding liquid is uniformly distributed, and the first diffusing flow path communicates with the first diffusing path At least one main flow path for receiving the grinding liquid from outside is formed,

And a second diffusing flow path formed on one side of the electrode and having a shape corresponding to the first diffusing flow path and being connected to the second diffusing flow path, It is preferable that a plurality of supply paths are formed along the flow path.

In addition, the supply flow passage is defined as a direction in which the longitudinal direction of the knife is defined as the positive X-axis direction at the front surface of the electrode, the upward direction is the positive Z-axis direction, And an angle formed by the angle formed by the supply flow passage with the positive direction of the X axis and the positive direction of the Y axis is defined as?

45 °??? 60 ° and 0 °??? 30 °.

The position fixing means may include: a first fixing shaft passing through the vertical piece and coupled to the grinding head; A second fixed shaft passing through the vertical piece and being coupled to the grinding head while being spaced apart from the first fixed shaft by a predetermined distance; A locus slot having a predetermined length formed through the vertical piece to receive the second fixed axis and allow the second fixed axis to rotate about the first fixed axis; And a lift slot for receiving the first fixed shaft and having a predetermined length formed in a curvature cooperating with the locus slot so that the first fixed shaft can be lifted and lowered together with the second fixed shaft when the first fixed shaft is lifted and lowered .

In this case, the upper and lower portions of the support bracket are screw-coupled to the upper and lower portions of the support bracket, respectively. The upper and lower portions of the support bracket move up and down and / or rotate to move up and down and / And a lower stopper.

It is preferable that the material of the electrode is made of a metal having a lower ionization tendency than the main material of the grinding wheel.

In addition, it is preferable that the metal is any one selected from stainless steel, copper, and high-silicon cast iron or an alloy thereof.

On the other hand, a first camera sensor for sensing the initial setting state and the grinding state of the grinding wheel and the knife is disposed at one side of the X axis, which is the slider moving direction. In the Y axis direction crossing the moving direction of the slider, And a second camera sensor for sensing an upper cutting edge of the knife to be ground by the second camera sensor.

In addition, it is preferable that a clamping block for vertically fixing the knife is provided at one side of the slider.

Finally, it is preferable that the moving plate and the slider are driven by any one of a linear motor, a belt, and a ball screw.

According to the electrolytic process dressing grinding apparatus for knife grinding of the present invention having the above-described structure, metal dusts generated during grinding and residue oxide generated by ionization are prevented from flowing into the supply channels of the electrode, So that the conductive grinding fluid is uniformly distributed at the interface between the electrode and the grinding wheel, and thus the effect of dressing to uniformly form abrasive particle protrusion of the grinding tip particles can be maintained.

Further, there is an advantage that the height of the knife and various angles of the knife edge blade can be immediately coped with by the structure in which the grinding wheel is rotated at a desired angle and lifted up and down.

FIGS. 1 and 2 are schematic views showing an electrode and a grinding wheel structure of a conventional grinding apparatus,
3 is a perspective view of an electrolytic dressing grinding apparatus for knife grinding according to an embodiment of the present invention,
FIG. 4 is an enlarged view of a grinding unit in the structure of an electrolytic process dressing grinding apparatus for knife grinding according to an embodiment of the present invention,
Fig. 5 is an enlarged view of the grinding head in the configuration of the grinding unit of Fig. 4,
6 and 7 are a side view and a front view showing the grinding liquid supply cover and the electrode of the grinding liquid supply unit,
8 is an enlarged cross-sectional view of a main portion showing a state in which the grinding liquid supply unit is engaged,
9A and 9B are reference views showing a state in which the grinding head is rotating.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer description.

The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

FIG. 3 is a perspective view of an electrolytic process dressing grinding apparatus for knife grinding according to an embodiment of the present invention. FIG. 4 is an enlarged view of a grinding unit of the electrolytic process dressing grinding apparatus of the knife grinding according to the embodiment of the present invention Fig. 5 is an enlarged view of the grinding head of the grinding unit of Fig. 4, Figs. 6 and 7 are a side view and a front view of the grinding liquid supply cover and electrodes of the grinding liquid supply unit, FIG. 9A and FIG. 9B are reference views showing a state in which the grinding head is rotated. FIG.

3 to 9, an electrolytic process dressing grinding apparatus 500 according to the present invention is an electrolytic process dressing grinding apparatus 500 for grinding a knife, which is mounted on a base B placed on an XY plane, ); A slider 200 disposed to face the moving plate 100 and moving in the X axis direction while vertically chucking the knife N; A supporting bracket 310 which is seated on the moving plate 100 and has a pair of vertical pieces 311 protruding from the upper surface of the moving plate 100 in a state where the front and rear are opened, A grinding wheel 331 having a cup-shaped grinding wheel 331 disposed on the front surface thereof and having a ring-shaped grinding tip 333 disposed between the vertical pieces 311 for grinding the knife N chucked by the slider 200, And a position fixing means 340 provided on the pair of vertical pieces 311 to adjust the rotational angle of the grinding head 330 about the vertical axis and the X axis, ); And a grinding tip 333a of the grinding tip 333. The electrode 420 is disposed adjacent to the electrode 420 with the grinding tip 333a of the grinding tip 333, And a grinding liquid supply cover 400 which is fixed to the electrode 420 and supplies the conductive grinding liquid through the electrode 420 to the gap.

In the present embodiment, it is described that the grinding workpiece is the knife N, but it is not limited to the kind of the grinding workpiece because it is also used for various workpieces requiring precision grinding such as the knife N. [

As shown in FIGS. 3 and 4, the base B has a substantially rectangular flat surface (top surface) so that the moving plate 100, the slider 200, etc., which will be described later, And a plurality of support structures (not shown) are coupled to the lower portion.

The moving plate 100 is formed in the shape of a rectangular plate and moves in the Y-axis direction shown in the figure while being seated on the base B.

In this case, the moving plate 100 is provided with a separate driving source, not shown, on the base B, and receives the power of the driving source to move in the Y-axis direction. The driving of the moving plate 100 through the driving source, A belt, and a ball screw.

The slider 200 is arranged to face the moving plate 100. The slider 200 has a rectangular flat surface and a knife N as a grinding workpiece is moved in the Y axis direction in which the moving plate 100 moves, Direction and moves leftward and rightward in the X-axis direction.

At this time, it is preferable that a clamping block 210 for vertically fixing the knife N is provided on one side of the slider 200. In this case, the clamping block 210 is a block body having a predetermined length in the X- 211 and a fixing piece 213 adjoining to one surface of the block body 211 by bolts (not shown).

Therefore, the knife N is disposed between the block body 211 and the fixing piece 213, and is disposed perpendicular to the slider 200.

Meanwhile, it is preferable that the slider 200 is moved in the X-axis direction by receiving power from a separate driving source (not shown), and the driving is performed by any one of a linear motor, a belt, and a ball screw.

The grinding unit 300 is fixed to the moving plate 100 and is moved in the direction of the slider 200 by the moving plate 100 so that the cutting edge N1 of the knife N fixed vertically to the slider 200 And is composed of a support bracket 310, a grinding head 330, and a position fixing means 340.

The supporting bracket 310 is mounted on the moving plate 100 and is composed of a pair of vertical pieces 311 protruding from the upper surface of the moving plate 100 so as to be opened in the Y-axis direction. That is, as shown in FIG. 4, the support bracket 310 is closed at all except the forward and backward directions.

At this time, it is preferable that the pair of vertical pieces 311 of the support bracket 310 have a predetermined thickness so that the grinding head 330 can be stably supported by the position fixing means 340 described later.

The grinding head 330 is disposed between the pair of vertical pieces 311 and grinds the cutting edge N1 of the knife N chucked by the slider 200, And a grinding wheel 331 having an approximately 'C' -shaped cross section in which the grinding tip 333 of the grinding wheel 333 is disposed on the front side.

At this time, the grinding wheel 331 rotates according to a signal of a control device (not shown) for controlling the number of revolutions, and the number of revolutions of the grinding wheel 331 varies depending on the hardness difference between the grinding wheel 331 and the workpiece, .

The reason why the grinding wheel 331 has a cup type shape is that the grinding wheel 331 is provided on the slider 200 moving in the X axis direction at the position where the knife N faces, This is because the grinding tip 333 must be maintained in a state in which the upper cutting edge N1 of the knife N is in contact with the grinding tip 333 and grinding is performed.

On the other hand, as shown in FIG. 4 and FIGS. 9A and 9B, the pair of vertical pieces 311 are provided with position fixing means 340, and the position fixing means 340 is provided on each of the vertical pieces 311 So that the rotation angle of the grinding head 330 can be adjusted around the elevation and X-axis.

The position fixing means 340 includes a first fixing shaft 341 penetrating through the vertical piece 311 and coupled to the grinding head 330 and a second fixing shaft 341 vertically separated from the first fixing shaft 341 by a predetermined distance, And a second fixed shaft 343 which receives the second fixed shaft 343 and rotates about the first fixed shaft 341 about the first fixed shaft 341. The second fixed shaft 343 is coupled to the grinding head 330 through the first fixed shaft 341, A locus slot 343a having a predetermined length formed through the vertical piece 311 to accommodate the first fixing shaft 341 and a second fixing shaft 343 when the first fixing shaft 341 is lifted, And a lift slot 341a having a predetermined length formed by a curvature cooperating with the locus slot 343a so as to be able to move up and down together with the locus slot 343a.

A first fixed shaft 341 coupled to the grinding head 330 and a step 341b at which the head of the second fixed shaft 343 is seated are provided inside each locus slot 343a and the ascending slot 341a, , And 343b are formed.

The first fixed shaft 341 and the second fixed shaft 343 are fixed to the first and second fixed shafts 341 and 343 so that the first fixed shaft 341 and the second fixed shaft 343 can be engaged with the grinding head 330. [ The grinding head 330 to which the shafts 341 and 343 are coupled, as well as the male and female threads, respectively, will be of course.

The position fixing means 340 can support various elevations along the vertical direction of the knife N to be ground by moving the grinding head 330 up and down and rotate about the X axis direction Accordingly, it is possible to cope with various grinding angles of the knife edge N1.

9A and 9B, the upper and the lower portions of the support bracket 310 are coupled with each other by a threaded manner so that the grinding head 330 can be elevated or rotated precisely, The upper stopper 321 and the lower stoppers 323a and 323b are provided to move the grinding head 330 up and down and / or rotate and to move the grinding head 330 up and down and / or to fix the rotated state .

At this time, the lower end of the upper stopper 321 and the upper end of the lower stoppers 323a and 323b are in a state of being adjacent to the upper surface and the lower surface of the grinding head 330, respectively.

In this state, the lower stoppers 323a and 323b move up and down and / or rotate the grinding head 330 while the upper stoppers 323a and 323b protrude and retract at different projecting heights and the upper stopper 321 supports the upper surface of the grinding head 330 do. It is needless to say that the upper stopper 321 is spaced apart from the upper surface of the grinding head 330 by a predetermined distance when the lower stoppers 323a and 323b protrude and retract.

When the upper stopper 321 and the lower stoppers 323a and 323b are completely projected and unfolded as described above, the grinding head 330 is completely fixed up and down, So that the stable grinding process of the knife N is achieved.

Further, since the lower stoppers 323a and 323b are independently projecting and retracting, the grinding head 330 can be finely adjusted in terms of elevation and / or rotation.

In the present embodiment, one upper stopper 321 is shown and two lower stoppers 323a and 323b are shown. However, the number of the upper stoppers 321 is not limited.

5 to 8, the grinding liquid supply unit 400 is disposed on the upper side of the grinding tip 333 and supplies the grinding liquid to the grinding tip 333, A rectangular plate-shaped electrode 420 having a predetermined thickness and disposed at a certain gap from an upper portion of the surface 333a; a plate-shaped electrode 420, which is adjacent to the electrode 420 in a shape corresponding to the electrode 420, Which is fixed to the grinding head 330 together with the electrode 420 through the grinding liquid injection nozzle 430 and supplies the conductive grinding liquid to the gap through the electrode 420, ).

The grinding liquid supply cover 410 has a curved first diffusing flow path 411 corresponding to a part of the grinding tip 333 so that the grinding liquid injected through the grinding liquid injection nozzle 430 is evenly distributed And at least one main flow path 413 communicating with the first diffusion flow path 411 and receiving grinding liquid from the outside is formed therein (see FIG. 6).

The reason why the shape of the first diffusion channel 411 has a curvature corresponding to the grinding tip 333 is that the grinding fluid supplied through the electrode 420 is uniformly supplied to the grinding tip surface 333a.

The grinding wheel 331 and the electrode 420 may be connected to a separate power supply unit (not shown).

Although the number of the main flow paths 413 is shown in this embodiment, the number of the main flow paths 413 is not limited because the number of the main flow paths 413 may vary depending on the area of the grinding liquid supply cover 410. [

The electrode 420 has a stepped second diffusion channel 421 having a shape corresponding to that of the first diffusion channel 411 on one surface, that is, the surface facing the grinding liquid supply cover 410 on which the first diffusion channel 411 is formed Along the second diffusion flow path 421 so that the grinding fluid is supplied to the gap (a space between the grinding tip surface 333a and the electrode 420) while being communicated with the second diffusion flow path 421 on the other surface There are formed supply passages 423 (see Fig. 7).

At this time, the supply flow path 423 is defined as a direction in which the length direction of the knife N at the front surface of the electrode 420 is the positive direction of the X axis and the upward direction is the positive direction of the Z axis, Assuming that the direction toward the grinding wheel 331 is the positive direction of the Y axis and the angle formed between the positive direction of the X axis and the positive direction of the X axis is the positive direction of the Y axis, ?? 60 deg. And 0 deg.?? 30 deg..

Precisely, beta is set to be the same as that of the supply flow path 423 starting from the second diffusion flow path 421 and inclined primarily toward the rotation center (gravity direction) of the grinding wheel 331, 7 is an angle formed by the center line and the Y axis, and alpha is a line extending from the second diffusion channel 421 to the top of the knife in the direction of rotation of the grinding wheel 331 And an angle formed between the center line of the supply flow path 423 and the X axis so as to be inclined toward the X axis secondarily toward the longitudinal direction.

The supply passage 423 is formed in a state in which a three-dimensional angle is maintained in the rotating direction of the grinding wheel 331 between the X-axis direction and the Y-axis direction by the angle? And the angle? And the open end of the second opening 423 is formed in an elliptical shape as enlarged on the upper side of Fig.

When the grinding process of the knife N is performed in the above-described state, since the supply flow path 423 is inclined at a three-dimensional angle with the grinding tip 333, impurities generated during grinding (metal debris and debris generated by ionization Oxide) is prevented from flowing into the supply passage 423 at the source.

Further, since the leading end of the supply passage 423 is formed with an ellipse, the supply area of the grinding liquid is widened. Further, the grinding liquid is attracted in the direction of the arrow in Fig. 7 by the pressure accompanying the rotation of the grinding tip 333 A certain amount of supply is always performed.

The supply of the impurities to the supply passage 423 of the electrode 420 is prevented so that the grinding liquid is smoothly supplied through the supply passage 423 and the grinding tip surface 333a of the grinding tip 333 is subjected to conductive grinding The dressing effect can be continuously maintained because the liquid is evenly distributed and the abrasive protrusion of the grinding tip 333 particles is rapidly and uniformly formed.

The reason why the angle of the supply flow path 423 is formed within a range satisfying 45 °?? 60 ° and 0 °??? 30 ° as described above is shown in Table 1 below, And is specifically shown.

The grinding conditions were such that the diameter of the grinding wheel was 200φ, the rotation speed was 12000 ~ 13000rpm, and the supply amount of the grinding liquid was adjusted to 15 liters per minute.

* Workability / Impurity Inflow.

* Processability is classified into 5 grades, and grade 5 is the most difficult to process.

* The amount of impurities is divided into 0 ~ 5 steps, and the 5th step means the state in which impurities are most introduced to the extent that the dressing effect is greatly reduced.

* X can not be produced.

As can be seen from the above Table 1, when the supply flow path 423 of the electrode 420 is formed at an angle within the range of 45 °?? 60 ° and 0 °??? 30 °, the workability is the best, The least was confirmed.

This is because when the angle of? Is less than 45, the inflow of the impurities is optimum but the processing itself is impossible or the processing is considerably difficult. When the angle is more than 60, the workability is improved but the inflow amount of the impurities is relatively increased. The workability is good up to 30 deg. And the amount of impurities is almost not. However, if it exceeds 30 deg., The workability is suddenly decreased to cause defective machining.

Therefore, since the supply flow path 423 is formed at a three-dimensional angle between the X axis and the Y axis satisfying 45 °?? 60 ° and 0 °??? 30 °, Almost no dressing effect can be maintained.

It is preferable that the material of the electrode 420 is made of a metal having a lower ionization tendency than that of the main material of the grinding wheel 331. This is because the oxidation reaction (reaction to lose electrons) must take place on the grinding wheel 331 side This is because the main material of the grinding wheel 331 is a metal having a higher ionization tendency than the material of the electrode 420 and the material of the electrode 420 and the main material of the grinding wheel 331 have a larger difference in ionization tendency.

Therefore, since the cast iron having a large amount of iron components is usually used for the grinding wheel 331, the material of the electrode 420 may be any one selected from stainless steel, copper, and high silicon cast iron having a lower ionization tendency than that of cast iron, Alloy.

In addition, a carbon coating may be applied to the surface of the electrode 420 corresponding to the grinding tip 333 of the grinding wheel 331 to prevent oxidation and abrasion of the electrode 420.

Meanwhile, the electrolytic dressing grinding apparatus 500 of the present invention is provided with a first camera sensor C1 for sensing a knife N to be ground and a second camera sensor C2.

The first camera sensor C1 is disposed on one side of the X axis which is the moving direction of the slider 200 to sense the initial setting state of the grinding wheel 331 and the knife N and the grinding state of the knife N. [

That is, whether or not the cutting edge N1 is grinded at a predetermined angle in the process of grinding the knife edge N1 according to the upright chucking state of the knife N and the grinding of the grinding tip 333, Sensing.

The second camera sensor C2 is disposed in the Y axis direction intersecting the moving direction of the slider 200 and senses the upper cutting edge N1 of the knife N grinded by the grinding wheel 331. [

This senses whether chipping is formed on the upper cutting edge N1 of the knife N when the knife N is ground by the grinding wheel 331. [

In this embodiment, the grinding state of the knife N is shown as being sensed through the first camera sensor C1 and the second camera sensor, but the invention is not limited thereto as long as the sensing of the knife N can be performed.

Meanwhile, the control of each of the devices described above is normally controlled through a controller (not shown), and the detailed description of the controller is omitted because it is a general matter.

Hereinafter, the operation of the electrolytic process dressing grinding apparatus 500 for knife (N) grinding according to the present invention will be described with reference to FIGS. 9A and 9B and the accompanying drawings.

The fixing member 213 of the clamping block 210 of the slider 200 is detached from the block body 211 and then the knife N is disposed on one side of the block body 211. Then, The fixing member 213 is fixed to the block body 211 to fix the knife N in an upright state.

At this time, the first camera sensor C1 senses the initial setting state of the knife N.

Needless to say, information such as the height of the knife N and the angle of the cutting edge N1 to be ground must be set in advance in the controller.

Thereafter, the grinding head 330 is moved up and down to align the grinding tip 333 with the cutting edge N1 of the knife N at the grinding position.

9A, the first fixed shaft 341 and the second fixed shaft 343 of the position fixing unit 340 are adjusted to release the fixed state of the grinding head 330 fixed to the support bracket 310 .

Thereafter, when the height of the knife N is checked and the grinding tip 333 is to be raised above the state shown in FIG. 9A, the two lower stoppers 323a and 323b are lifted and lowered, The grinding head 330 is lifted up and upward in the drawing.

Up and down of the grinding head 330 is performed until the grinding tip 333 and the cutting edge N1 of the knife N coincide with each other and the upper stopper 321 is brought into contact with the upper surface of the grinding head 330 And are spaced apart at a predetermined interval.

At this time, the grinding head 330 ascends and descends along the lift slot 341a and the locus slot 343a.

When the grinding head 330 is completely lifted and lowered, only the lower stopper 323b on the left side in the drawing is lifted and lowered as shown in FIG. 9B, so that the grinding head 330 is rotated around the first fixing shaft 341.

In this case, since the grinding head 330 moves up and down as the left lower stopper 323b moves in and out of the second fixed shaft 343, the second fixed shaft 343 moves together along the locus slot 343a.

The rotation of the grinding head 330 is continued until the grinding tip surface 333a of the grinding tip 333 reaches an angle corresponding to the set grinding angle of the knife N of the knife N. [

Then, when the lower stoppers 323a and 323b are completely protruded and retracted, the upper stopper 321 protrudes and retracts to support the upper surface of the grinding head 330 to keep the grinding head 330 lifted and / or rotated.

When the grinding head 330 is fixed to the support bracket 310 by tightening the first and second fixing shafts 341 and 343 to move the grinding head 330 up and down and / .

On the other hand, the rotated state of the grinding tip 333 is detected by the first camera sensor C1. If the grinding tip 333 is rotated, that is, when the angle of the grinding tip 333 is changed, And then through the first camera sensor C1.

In this state, the moving plate 100 is driven to move the grinding unit 300 in the Y axis direction. At this time, the grinding tip surface 333a of the grinding tip 333 is moved in the Y axis direction by the cutting edge N1 of the knife N ) Until it is adjacent.

Thereafter, the slider 200 is repeatedly moved leftward and rightward in the X-axis direction in the figure, and the moving plate 100 is moved stepwise by a distance set in the Y-axis direction in accordance with the repeated movement of the slider 200, 331 are rotated to grind the cutting edge N1 of the knife N through the grinding tip surface 333a of the grinding tip 333.

The first camera sensor C1 senses the grinding state of the knife edge N1 grinded by the grinding tip 333 in real time and the second camera sensor C2 grinds the grinding state of the knife edge N1 by grinding It is sensed whether chipping is formed on the upper side of the knife edge N1 of the knife N to be formed.

Meanwhile, when the knife N is ground, the grinding liquid is supplied to the grinding tip 333 through the grinding liquid supply unit 400.

The grinding liquid is injected into the first and second diffusion paths 411 and 421 adjacent to the electrode 420 through the main flow path 413 of the grinding liquid supply cover 410 through the grinding liquid injection nozzle 430, The injected grinding liquid is instantaneously diffused into the first and second diffusion passages 411 and 421 by the injection pressure and filled.

The grinding liquid filled in the first and second diffusion paths 411 and 421 is supplied to the grinding tip 333 and the electrode 420 through a plurality of supply paths 423 formed in the second diffusion path 421, (See Fig. 8).

At this time, the grinding liquid is formed so that the angle of each supply flow path 423 satisfies 45 °?? 60 ° and 0 °??? 30 between the X axis and Y, which are the rotating directions of the grinding tip 333 And is supplied along the rotating direction of the grinding tip 333.

When the grinding liquid is supplied in the rotating direction of the grinding tip 333 as described above, it is fundamentally blocked that the metal debris generated during the grinding is flowed into the supply flow path 423, So that the grinding process can be performed smoothly.

Then, when the set grinding angle of the knife edge N1 is sensed through the detection of the first camera sensor C1, the driving of the slider 200 is stopped and the moving plate 100 is returned to the initial state The grinding process of the knife N is completed.

The knife N that has been ground is removed from the slider 200 and put into a post-process, and the next knife N is coupled to the slider 200 to advance the grinding process in the manner described above.

If the height of the knife N is changed, the operator inputs the change to the controller and resets the elevation and elevation of the grinding head 330.

As described so far, the electrolytic process dressing grinding apparatus for electrolytic knife grinding according to the present invention prevents the metal debris generated during grinding and the oxide of the residues generated by ionization from flowing into the electrode supply channel, The conductive grinding fluid is uniformly distributed at the interface between the electrode and the grinding wheel, and the effect of the dressing for uniformly forming the abrasive protrusion of the grinding tip particles is maintained.

Further, there is an advantage that the height of the knife and various angles of the knife edge blade can be immediately coped with by the structure in which the grinding wheel is rotated at a desired angle and lifted up and down.

As described above, the process dressing grinding apparatus according to the present invention is an electrolytic apparatus for knife grinding. However, it should be understood that the technical scope of the invention is not limited thereto, to be.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. There is no doubt that it is within.

For example, the means for raising and lowering the grinding head, the structure of the grinding liquid supply unit, and the angle of the supply nozzle formed on the electrode can be modified to any extent.

100: moving plate 200: slider
210: clamping block 211: block body
213: Fixing piece 300: Grinding unit
310: support bracket 311: vertical piece
321: upper stoppers 323a, 323b:
330: grinding head 331: grinding wheel
333: Grinding tip 333a: Grinding tip face
340: Position fixing means 341:
341a: Lift-up slots 341b, 343b:
343: second fixed shaft 343a: locus slot
400: Grinding fluid supply unit 410: Grinding fluid supply cover
411: first diffusion channel 413: main channel
420: electrode 421: second diffusion channel
423: Supply channel 500: Dressing grinding device
B: Base C1: First camera sensor
C2: second camera sensor N: knife
N1: Insular day

Claims (10)

A process dressing grinding apparatus (500) for electrolyzing a knife (N) for grinding a cutting edge (N1) of a knife (N)
A moving plate (100) which is seated on a base (B) placed on an XY plane and moves in the Y axis direction;
A slider 200 disposed to face the moving plate 100 and moving in the X axis direction while vertically chucking the knife N;
A supporting bracket 310 which is seated on the moving plate 100 and has a pair of vertical pieces 311 protruding from the upper surface of the moving plate 100 in a state where the front and rear are opened, A grinding wheel 331 having a cup-shaped grinding wheel 331 disposed on the front surface thereof and having a ring-shaped grinding tip 333 disposed between the vertical pieces 311 for grinding the knife N chucked by the slider 200, And a position fixing means 340 provided on the pair of vertical pieces 311 to adjust the rotational angle of the grinding head 330 about the vertical axis and the X axis, ); And
A plate electrode 420 disposed at a certain distance from a part of the grinding tip surface 333a of the grinding tip 333 and a grinding head 330 disposed adjacent to the electrode 420 with the electrode 420, And a grinding liquid supply cover (410) fixed to the electrode (420) and adapted to receive the conductive grinding fluid and to supply the conductive grinding fluid to the gap through the electrode (420)
The first diffusing flow path 411 having a curved shape corresponding to a part of the grinding tip 333 is formed on one surface of the grinding liquid supply cover 410 so as to distribute the grinding liquid evenly. At least one main flow path 413 communicating with the first diffusion path 411 and receiving the grinding liquid from the outside is formed,
A second diffusion channel 421 having a shape corresponding to the first diffusion channel 411 is formed on one surface of the electrode 420 and a second diffusion channel 421 having a shape corresponding to the first diffusion channel 411 is formed on the other surface, Wherein a plurality of supply flow paths (423) are formed along the second diffusion path (421) so that the grinding liquid is supplied to the gap. delete The method according to claim 1,
The supply passage 423,
The length direction of the knife N is referred to as a positive X-axis direction and the upward direction is referred to as a positive Z-axis direction from the front surface of the electrode 420. The grinding wheel 331 Is an positive Y-axis direction, and an angle between the positive direction of the X-axis direction and the positive direction of the Y-axis direction of the supply path 423 is β,
45 °??? 60 ° and 0 °??? 30 °. The method according to claim 1,
The position fixing means 340,
A first fixing shaft 341 penetrating the vertical piece 311 and coupled to the grinding head 330;
A second fixing shaft 343 passing through the vertical piece 311 while being separated from the first fixing shaft 341 by a predetermined distance and coupled to the grinding head 330;
A locus having a predetermined length formed through the vertical piece 311 to allow the second fixed axis 343 to rotate around the first fixed axis 341, A slot 343a; And
And is formed with a curvature that cooperates with the locus slot 343a so as to be lifted and lowered together with the second fixed shaft 343 when the first fixed shaft 341 is lifted and lowered And a lifting slot (341a) having a predetermined length. The process dressing grinding apparatus (500) of the electrolytic process for knife grinding. 5. The method of claim 4,
The grinding head 330 is coupled to the upper and lower portions of the support bracket 310 in a threaded manner so that the grinding head 330 can be lifted and / or rotated while being lifted and / And an upper stopper (321) and a lower stopper (323a, 323b) for fixing the state of the process stopper (321). 6. The method according to any one of claims 1 to 5,
Wherein the electrode (420) is made of a metal having a lower ionization tendency than the main material of the grinding wheel (331). The method according to claim 6,
Wherein the metal is one selected from the group consisting of stainless steel, copper, and high-silicon cast iron, or an alloy thereof. 6. The method according to any one of claims 1 to 5,
A first camera sensor C1 for sensing the initial setting state and the grinding state of the grinding wheel 331 and the knife N is disposed at one side of the X axis which is the moving direction of the slider 200,
A second camera sensor C2 for sensing an upper cutting edge N1 of the knife N grinded by the grinding wheel 331 is disposed in the Y axis direction intersecting with the moving direction of the slider 200 (500) which is an electrolytic process for knife grinding. 6. The method according to any one of claims 1 to 5,
And a clamping block (210) for vertically fixing the knife (N) is provided on one side of the slider (200). 6. The method according to any one of claims 1 to 5,
Wherein the moving plate (100) and the slider (200) are driven by a linear motor, a belt, and a ball screw.

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