KR100820329B1 - Grinding apparatus of pruning shears blade - Google Patents

Abstract

The present invention relates to a pruning shear blade device, and a holder body having a seating portion is formed so that the cutting blade is seated, and a holder plate detachable to the holder body to detach the cutting blade seated on the seating portion; ; An angle correction cylinder installed on the turntable and engaging the holder and positioning the holder such that the cutting surface of the cutting blade is parallel to the vertical surface of the grinding wheel; Grinding wheel driving means is mounted and the grinding wheel for grinding the cutting surface; The grinding wheel driving means is seated and the grinding wheel conveying means for advancing the grinding wheel to the cutting blade side;

Therefore, the cutting surface of the cutting blade is gripped by the angle correction cylinder to be parallel to the side of the grinding wheel, and the cutting blade is firmly supported on the seating part of the holder body so that the cutting blade does not push to the opposite side of the grinding wheel when grinding the cutting surface. Since the coolant is sufficiently supplied to the rear surface of the cutting surface through the recessed and recessed grooves of the seating portion, the cooling oil is rapidly cooled to generate a high quality cutting blade.

Turntable, air filter, angle correction cylinder, spring, holder, holder body, seating part, irregularities, holder plate, grinding wheel drive means, grinding wheel feed means, ball screw, cutting blade, cutting surface

Description

Grinding apparatus of pruning shears blade}

1 is a schematic partial side view showing a general pruning shears

Figure 2 is a schematic perspective view showing the present invention shear blade grinding device

Figure 3 is a schematic cross-sectional view showing the interior of the angle correction cylinder

4 is a schematic perspective view of a holder;

5 and 6 is a schematic cross-sectional view and a partial appearance perspective view showing a state where the cutting blade of the pruning shears is mounted

7 is a schematic partial plan view showing the main portion of the holder;

8 and 9 are schematic views showing a grinding wheel feed means

10 is a schematic cross-sectional view showing another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10: main body 11: turntable

12: air filter 20: angle correction cylinder

24: spring 30: holder

31: holder body 32: seating portion

33: unevenness 34: holder plate

40: grinding wheel drive means 41: grinding wheel

41a: side of grinding wheel 44 motor

50: grinding wheel transfer means 52: bed

55: ball screw 57: servo motor

60: cutting blade 60a: side (of cutting blade)

60b: cutting plane

The present invention relates to a shear blade grinding device, and more particularly, to automatically grip the cutting blade so that the side of the grinding wheel parallel to the cutting surface of the cutting blade, maximizing the cooling efficiency of the cutting surface when the cutting surface of the cutting blade is ground The present invention relates to a shear blade grinding device that can be made.

Pruning shears are scissors used to mow the lawn or pruning garden water, which are as shown in Fig. 1, one end of which is coupled to the end of the first handle (2), and one end 2 consists of a support piece 5 coupled to the end of the handle 4, a cutting blade 6 coupled to the support piece 5 by rivets 7, and a support blade 3 and a cutting blade 6 ), The bolt 8 and the nut 9 are fastened to the rotation center.

An arc-shaped cutting surface 6b is formed on the cutting blade 6 among such shears, and the cutting surface 6b is cut at an angle with respect to the side surface 6a of the cutting blade 6. The cutting surface 6b of the cutting blade 6 is ground after being cut at an angle with respect to the side surface 6b of the cutting blade 6 in order to improve the cutting force.

In order to grind the cutting surface 6b of the cutting blade 6, first, the cutting blade 6 is opposed to the side surface of the grinding wheel, and then the cutting surface 6b is cut by the angle formed by the side surface 6a of the cutting blade 6 and the cutting surface 6b. Tilt the blade 6 to position the inclined cutting surface 6b and the side of the grinding wheel parallel to each other. In this way, when the side surface of the grinding wheel and the cutting surface 6b of the cutting blade 6 face in parallel, the side surfaces of the grinding wheel and the cutting surface 6b are brought into contact with each other to grind.

Since the cutting blade 6 is not an expensive product, a mass production system is required to be competitive in the product, and automation of the grinding operation is inevitably required. An automated process of the grinding operation includes an important process of automatically holding the cutting blade 6 to face the grinding wheel and contacting the cutting surface 6b of the cutting blade 6 to the side of the grinding wheel. In order to automatically grind the cutting surface 6b of), three important techniques must be preceded.

First, the cutting blade 6 should be automatically grated and slanted so that the cutting surface 6b of the cutting blade 6 is parallel to the side surface of the grinding wheel.

Next, when the cutting surface 6b is in contact with the grinding wheel while the cutting blade 6 is inclinedly gripped, the opposite side of the cutting surface 6b must be firmly supported so that the cutting surface 6b is not pushed to the opposite side of the grinding wheel. .

In addition, when the cutting surface 6b is ground, the cutting surface 6b is heated to a high temperature due to the frictional resistance with the grinding wheel. If it is not properly cooled, the unnecessary properties such as brittleness are increased and the properties of the material are changed due to the high temperature. Is generated. Therefore, even if the cutting blade 60 is firmly gripped to be inclined, the high heat generated at the cutting surface 6b should be properly cooled.

In the related art, however, the cutting blade 6 is automatically held at an inclined angle to mass-produce the cutting blade 6, and is firmly supported so as not to be pushed backward when grinding the cutting surface 6b, while automatically cooling the high heat generated at the cutting surface 6b. Grinding device has not been developed, and thus could not produce high-quality cutting blade.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide a pruning shear blade grinding device that can automatically grip the cutting blade so that the side of the grinding wheel and the cutting surface of the cutting blade are parallel.

Another object of the present invention is to provide a shear blade grinding device that can maximize the cooling efficiency of the cutting surface while supporting the cutting surface of the cutting blade is not pushed when grinding.

In order to achieve the above object, according to the present invention, the above-mentioned shear blade grinding device is a device for grinding a cutting surface of a cutting blade for shearing with a grinding wheel, the holder body having a seating portion formed so that the cutting blade is seated, and the holder body. A holder made of a holder plate detachably attached to and detachable from the cutting blade seated on the seating part; An angle correction cylinder installed on a turntable and engaging the holder and positioning the holder such that a cutting surface of the cutting blade is parallel to a vertical surface of the grinding wheel; Grinding wheel drive means for mounting the cutting surface grinding grinding wheel; The grinding wheel driving means is seated and the grinding wheel conveying means for advancing the grinding wheel to the cutting blade side;

Another feature of the shear blade grinding device of the present invention, a plurality of irregularities are formed in the seating portion of the holder body so that air or cooling oil is guided to the rear side of the cut surface of the cutting blade.

Another feature of the shear blade grinding device of the present invention, the angle correction cylinder, the holder body is coupled to the cylinder housing for inclining the front side of the holder body by the inclination angle of the cutting surface, and provided inside the cylinder housing And a cylinder rod which is transported along the inside thereof, and a cylinder rod having one end coupled to the piston and the other end coupled to the holder plate.

In another aspect of the present invention, the shear blade grinding device, the grinding wheel conveying means is a bed on which the grinding wheel drive means is seated, a housing fixed to the bed and formed with a screw hole, and fastened to the screw hole of the housing It is made of a ball screw, and a motor connected to the ball screw to rotate it.

In another aspect of the present invention, the shear blade grinding device, four angle correction cylinders are radially installed on the turntable, the grinding wheel is installed to face two adjacent holders of the four holders, the turntable Is provided to rotate by 180 °.

Therefore, the cutting surface of the cutting blade is gripped by the angle correction cylinder to be parallel to the side of the grinding wheel, and the cutting blade is firmly supported on the seating part of the holder body so that the cutting blade does not push to the opposite side of the grinding wheel when grinding the cutting surface. Since the coolant is sufficiently supplied to the rear surface of the cutting surface through the recessed and recessed grooves of the seating portion, the cooling oil is rapidly cooled to generate a high quality cutting blade.

Specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

Figure 2 is a schematic perspective view showing a shear blade grinding device of the present invention, Figure 3 is a schematic cross-sectional view showing the inside of the angle correction cylinder, Figure 4 is a schematic perspective view showing a holder, which is a turntable 11 and the angle correction cylinder 20, the holder 30, the grinding wheel drive means 40, and the grinding wheel conveying means 50 are comprised.

The turntable 11 is installed on the main body 10 and controlled by a controller (not shown), and when the grinding operation of the cutting surface 60b to be described later is completed, the turntable 11 is rotated by a predetermined angle so as to perform the next grinding operation.

In the center of the turntable 11, the air forming a part of the air control unit (air control unit) and filters the compressed air generated by the air compressor (air compressor) to filter foreign matters such as dust, moisture, etc. contained in the air Filters 12 are installed. An angle correction cylinder 20 is connected to the air filters 12 so that the air filtered by the air filter 12 is supplied or discharged.

The angle correction cylinder 20 is radially installed on the turntable 11, the holder 30 to be described later is coupled to the front of the holder 30 by the inclination angle θ 'of the cutting surface 60b of the cutting blade 60. ), The cutting surface 60b is made parallel to the vertical surface of the grinding wheel 41 by tilting the front side.

This angle correction cylinder 20 is composed of a cylinder housing 21, a piston 22, a cylinder rod 23, as clearly shown in FIG.

The cylinder housing 21, the holder body 31 to be described later is coupled to the front of the holder body 31 is coupled to the center thereof is inclined toward the front side by a predetermined angle (θ), accordingly the holder body 31 The cutting blade 60 seated on the seating portion 32 of the side 60a does not form a vertical plane, but the inclined cutting plane 60b forms a vertical plane, and the side 41a of the grinding wheel 41 and the cutting plane ( 60b) is parallel.

The piston 22 is coupled to the inner space 21a of the cylinder housing 21. The piston 22 is positioned between the air inlet hole 21b, which is composed of the first hole 21b 'and the second hole 21b ", and is advanced when the compressed air is supplied to the first hole 21b'. When the compressed air is supplied to the second hole 21b "

One end of the cylinder rod 23 is coupled to the piston 22, and the other end thereof is coupled to the holder plate 34 and the bolt 35, which will be described later.

Holder 30 is composed of a holder body 31 and the holder 30, as shown in Figs. The holder body 31 is coupled to the front of the cylinder housing 21 of the angle correction cylinder 20 as described above, and is installed on the angle correction cylinder 20 inclined by the inclination angle θ 'of the cutting surface 60b. By a certain angle θ to the front side thereof. The front of the holder body 31 is formed with a recess 32 inwardly recessed so that the cutting blade 60 is seated. When the cutting blade 60 is seated on the seating portion 32, the lower, one side, and rear portions of the cutting blade 60 except for the cutting surface 60b and its periphery are in close contact with the mounting portion 32.

The recessed part 33 which consists of many uneven groove | channel 33b and the uneven protrusion 33a is formed in the mounting part 32 in which the back surface of the cut surface 60b is located here. Therefore, when the cutting blade 60 is seated on the seating portion 32, the opposite side of the cutting surface 60b is supported by the plurality of uneven protrusions 33a and the cooling oil is cut by the plurality of uneven grooves 33b. It is guided smoothly to the back side.

Therefore, since the opposite side of the cutting surface 60b of the cutting blade 60 is supported by the plurality of uneven protrusions 33a, when the cutting surface 60b contacts and polishes the grinding wheel 41, the cutting surface 60b is the grinding wheel. It is firmly supported so as not to be pushed to the opposite side of the.

In addition, a plurality of passages are formed between the rear surface of the cutting blade 60 and the seating portion 32 by the plurality of uneven grooves 33b formed in the seating portion 32, and thus grinding grinding stone when the cutting surface 60b is ground. Even if high temperature is generated in the cutting surface 60b by frictional resistance with the 41, cooling oil is smoothly supplied along the uneven groove 33b to the cutting blade 60 back side, thereby rapidly cooling the generated high heat.

The holder plate 34 attaches and detaches the cutting blade 60 seated on the seating portion 32 while attaching and detaching the holder body 31. The holder plate 34 is coupled to the end of the cylinder rod 23 by a bolt 35 and is seated on the seating portion 32 while being spaced or in close contact with the holder body 31 when the cylinder rod 23 is moved forward or backward. The detachable cutting blade 60 can be detached.

The angle correction cylinder 20 and the holder 30 described above may be installed on the turntable 11, but four are preferably installed in all four directions for the efficiency of the work. It can also be used depending on the choice.

The grinding wheel driving means 40 includes a chuck 42 in which the grinding wheel 41 is chucked as shown in FIGS. 2 and 8, a motor 44 for rotating the chuck 42 at high speed; The first pulley 43, the second pulley 45, and the belt 46 are connected to the chuck 42 and the motor 44 to transmit the power of the motor 44 to the chuck 42.

Grinding wheel transfer means 50 is composed of a bed 52, the housing 54, the ball screw 55, the servo motor 57, as shown in Figs. The bed 52 has a guide jaw 53 formed to slide on the guide 51 provided on the main body 10, and the grinding wheel driving means 40 is seated on the bed 52.

The housing 54 is fixed to the lower part of the bed 52, and the screw hole 54a is formed in the center along the conveyance direction of the bed 52. As shown in FIG. As for the ball screw 55, the male screw 55a is fastened to the screw hole 54a of the housing 54, and is connected to the servomotor 57 by the coupling 56, and thus the thermomotor ( When the ball screw 55 is rotated when the 57 is rotated, the housing 54 and the bed 52 fixed to the housing 54 are moved forward or backward along the longitudinal direction of the ball screw 55.

Meanwhile, the grinding wheel driving means 40 and the grinding wheel conveying means 50 may be provided so as to face the angle correction cylinder 20 and the holder 30 described above, but two adjacent angles as shown in FIG. 2. Two can be installed so as to face each of the correction cylinder 20, in this case, the turntable 11 can be rotated by 180 ° two grinding blades 60 at the same time.

The action and effects of the present invention pruning shears of this configuration are as follows.

By operating a foot valve (not shown) to supply the compressed air generated by the air compressor to the air filter 12, the compressed air passes through the air filter 12, foreign matters such as dust or moisture contained therein Filtered. The filtered compressed air is introduced into the angle correction cylinder 20 to operate the angle correction cylinder 20 and the holder 30 installed therein as shown in FIG. 3. That is, the compressed air introduced into the internal space 21a through the first hole 21b 'of the angle correction cylinder 20 pushes the piston 22 and the cylinder rod 23 coupled thereto to the holder 30 side. Thus, the holder plate 34 in close contact with the holder body 31 is spaced apart therefrom.

3 and 4, when the holder plate 34 is spaced apart from the holder body 31, the cutting blade 60 is seated on the seating portion 32 of the holder body 31. In this state, when the foot is released from the foot valve, the piston 22 and the cylinder rod 23 enter the compressed air into the angle correction cylinder 20 through the second hole 21b " 5 and 6, the holder plate 34 is in close contact with the holder body 31 to fix the cutting blade 60 to the holder 30.

In this way, when the cutting blade 60 is attached to the holder 30, the cutting blade 60 is in an optimal state for automatically grinding the cutting surface 60b of the cutting blade 60. That is, since the holder 30 coupled thereto by the angle correction cylinder 20 is inclined to the front side by the inclination angle θ 'of the cutting surface 60b of the cutting blade 60, the cutting blade 60 is When mounted, its cutting surface 60b is parallel to the vertical surface of the grinding wheel 41. Therefore, when the grinding wheel 41 is advanced to be in close contact with the cutting blade 60, the inclined cutting surface 60b and the side surface 41a of the grinding wheel 41 are in close contact with each other, so that the cutting surface 60b is smoothly ground.

In addition, when the cutting blade 60 is seated on the seating portion 32 of the holder body 31, the rear surface opposite to the cutting surface 60b is supported by a plurality of uneven protrusions 33a. Therefore, when the grinding wheel 41 is advanced and the cutting surface 60b is ground, the cutting surface 60b is firmly supported without being pushed to the opposite side of the grinding wheel 41, and eventually the entire cutting surface 60b is ground constantly.

And, when the cutting blade 60 is seated on the seating portion 32, as shown in Figure 7 by the plurality of recessed grooves 33b formed in the seating portion 32 and the back and the seating portion ( A plurality of passages are formed between 32). Therefore, even if high temperature is generated in the cutting surface 60b due to the frictional resistance with the grinding wheel 41 during grinding of the cutting surface 60b, the coolant is smoothly supplied along the uneven groove 33b to the cutting edge 60 rear side, and thus generated high heat. It cools down quickly. Therefore, since the high heat generated during the grinding of the cutting surface 60b is quickly cooled, the problem of changing the properties of the material due to high temperature is solved.

Meanwhile, when the cutting blades 60 are mounted on the two holders 30, the turntable 11 is rotated 180 ° so that the cutting surfaces 60b of the two cutting blades 60 are opposed to the two grinding wheels 41.

Here, the grinding wheel 41 includes a motor 44 that rotates at a high speed and a first pulley 43, a second pulley 45, and a belt 46 that transmit power of the motor 44 to the grinding wheel 41. Because it rotates at a high speed by), when the grinding wheel transfer means 50 is advanced, it is in contact with the cutting surface (60b) of the cutting blade (60) to grind it.

When the cutting blade 60 of the holder 30 is opposed to the grinding wheel 41, the servomotor 57 of the grinding wheel feed means 50 is operated to rotate the ball screw 55, and thus the housing 54. And the bed 52 is advanced along the longitudinal direction of the ball screw 55, and the side surface 41a of the grinding wheel 41 contacts the cutting surface 60b of the cutting blade 60, and it grinds.

When grinding of the cutting surface 60b is completed, the housing 54 and the bed 52 are reversely rotated and advanced by the servomotor 57 and the grinding wheel driving means 40 on the bed 52. This is reversed, the turntable 11 is rotated 180 ° when the grinding of the cutting surface (60b) of the two cutting blades 60 in this way is completed.

When grinding of the cutting surface 60b is completed as described above, pneumatic pressure is supplied to the first hole 21b 'of the angle correction cylinder 20 to be installed on the piston 22, the cylinder rod 23, and the cylinder rod 23. The holder plate 34 is moved as shown in FIG. 3, and the cutting blade 60 seated on the seating portion 32 of the holder body 31 is taken out and the other cutting blade 60 to be ground is mounted thereon. The cutting blade thus seated is ground again in the same manner as described above.

10 is another embodiment of the present invention, the shear blade grinding device, which is provided with a spring 74 in the angle correction cylinder 70 so that the piston 72 is the angle correction cylinder 70 elastically to the rear side I support it. Therefore, when compressed air is supplied to the internal space 71 of the angle correction cylinder 70, the piston 72 is transferred and the spring 74 is compressed. When the pressure of the compressed air is released, the spring 74 is transferred by the restoring force of the spring 74. Piston 72 is restored.

The present invention having such a configuration differs from FIGS. 2 to 9 only in that the piston 72 is restored by the restoring force of the spring 74, and the cylinder rod 73 is moved back and forth to hold the cutting blade 90 in the holder 80. The main action and effect of desorption at) is the same as described above.

According to the present invention as described above, the cutting surface of the cutting blade is gripped by the angle correction cylinder to be parallel to the side of the grinding wheel, the cutting blade is firmly supported on the seating portion of the holder body so that the cutting blade when grinding the cutting surface It is not pushed to the opposite side of the cooling oil is supplied sufficiently to the rear side of the cutting surface through the uneven grooves of the mounting portion to quickly cool the high temperature generated in the cutting surface, it is possible to automatically mass-produce a high-quality cutting blade.

Claims (5)

In the device for grinding the cutting surface of the cutting blade for pruning shears with a grinding wheel, A holder comprising a holder body having a seating portion configured to seat the cutting blade, and a holder plate detachably attached to the holder body to attach and detach the cutting blade mounted on the seating portion; An angle correction cylinder installed on a turntable and engaging the holder and positioning the holder such that a cutting surface of the cutting blade is parallel to a vertical surface of the grinding wheel; Grinding wheel drive means for mounting the cutting surface grinding grinding wheel; The grinding wheel drive means is seated and the grinding wheel conveying means for advancing the grinding wheel to the cutting blade side; A pruning shear blade device, characterized in that a plurality of irregularities are formed so that air or cooling oil is guided to the rear surface side of the cutting surface. delete According to claim 1, wherein the angle correction cylinder, A cylinder housing to which the holder body is coupled and tilts the front surface of the holder body to the front side of the cutting surface by only an inclination angle thereof; A pruning shear blade device, characterized in that consisting of a cylinder rod coupled to the holder plate. According to claim 1, wherein the grinding wheel conveying means, And a bed on which the grinding wheel driving means is seated, a housing fixed to the bed and formed with a screw hole, a ball screw fastened to the screw hole of the housing, and a motor connected to the ball screw to rotate it. Shears blade grinding machine. The method of claim 1, Four angle correction cylinders are radially installed on the turntable, the grinding wheel is installed to face two adjacent ones of the four holders, and the turntable rotates by 180 °. Blade grinding device.

Images