KR101148227B1 - Cutting device of a drill blade - Google Patents

Abstract

The present invention relates to a cutting means for cutting a drill blade, and relates to a drill blade automatic cutting device conceived to be able to automatically cut the drill blade more safely, faster and more accurately than the conventional.

In the present invention, the transfer pedestal 110 is located on the bottom surface and the plate surface is installed to be linearly movable back and forth; The main body 121 to be coupled to the transfer pedestal, the guide rail 123 fixedly coupled to the main body in the longitudinal direction, the inclined plate 122 is coupled to the body inclined plate and the swing handle rotatably coupled to the main body A guide unit 120 formed of 121b; An elevating block 133 having a guide groove 133a having a shape corresponding to an outer shape of the guide rail 123 and coupled to the main body, the main body 131 having a concave elastic rod receiving portion 131a formed therein, It is composed of an elastic push rod 132 inserted into the elastic push rod receiving portion and hinged and receiving an elastic force toward the front and a side plate 138 coupled to the side end of the elastic push rod and rotatably mounted a bearing 138a at the front end portion. Elevating unit 130; And a casing 141 coupled to the elevating unit and having a through hole 141b formed therein, and a drill chuck coupling pipe 142 and a drill 150 inserted into the casing to be rotatably mounted. A drill fixing unit 140 including a drill chuck 151 inserted through the drill chuck coupling pipe and coupled thereto; Disclosed is a drill cutting device comprising a.

Drill blade, first inclined blade, second inclined blade, feed bracket, screw shaft, guide unit, inclined plate, first inclined surface, second inclined surface, guide rail, swing handle, elevating unit, elevating block, hinge pin, elastic rod, Pressure plate, pressure spring, close spring, side plate, bearing, rack gear, drill chuck, drill chuck coupling pipe, changeover notch, casing, rotation angle changer, rotating body, pinion gear, radial bearing, thrust bearing, lock ring

Description

Cutting device of a drill blade

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drill cutting device, and more particularly, to a drill cutting device, which is conceived so as to rapidly and safely and efficiently cut both inclined blades of a drill blade at a precise angle at a precise position.

A drill is a type of work tool for drilling holes in objects such as resin, wood, metal, and concrete. As the blade is worn out by frequent use, the drill blade must be newly cut and polished after a certain period of use. .

In the past, the operator fixed the drill blade to a jig, etc., and used it by cutting the drill blade manually by using a grinding machine.Therefore, there was always a risk factor due to the high-speed rotating grinder, and it was difficult to accurately process the inclined surface of the drill blade. There was a difficult problem. In particular, in the case of a drill blade, a pair of opposite inclined blades are formed at a tip portion of the drill to have a constant taper angle. When cutting the drill blade by hand, the inclined surfaces of the inclined blades on both sides are different from each other. However, there was a problem that it is very difficult to process both slanted blades to be exactly symmetrical.

8 is a front view of a conventional drill blade grinding machine, which is disclosed in Utility Model Registration No. 0236962. The drill blade grinder is proposed to overcome the problems caused by the above-described manual machining of the drill blade, and in use, the drill 161 is fixed to the drill chuck 160 in the drill guide pipe 180, and then the adjustment bolt 243 Rotate so that the machining surface of the drill is in the machining position of the grinding wheel 101. Then, while operating the motor driving unit 220 and at the same time rotating the drill guide tube 180 is to process the inclined blade of the drill 161.

By the way, according to the conventional drill blade grinding machine is fixed to the inside of the drill guide pipe 180 and then rotates to process the drill blade, so as a result of machining the inclined blade once from the tip to the bottom of the drill blade After turning the drill to rotate the inclined blade in the lateral direction, and then adjust the depth of the blade by rotating the adjustment bolt (243) again after rotating the drill guide tube to rotate the work to process the inclined blade There is. Therefore, not only the working time required for cutting one drill blade is long, but also the machining of one slanted blade is completed by cutting several times laterally depending on its depth. There is a problem that it is impossible to cut to complete symmetry. The conventional drill blade grinder also has the advantage that it is somewhat convenient compared to the case of machining the drill blade by hand, but in the end, the operator must rotate the drill guide tube from time to time, and change the position of the adjustment bolt (243) The machining depth of the furnace drill blade should be adjusted, and also has the inconvenience of adjusting the inclination angle by adjusting the angle correction piece 140 hinged to the rotary plate 120. In addition, even when machining the slanted blades in both helical directions of the drill blade in this way, there is a problem that the position and the accuracy do not match, requiring rework or correction work.

Therefore, it is required to develop a new concept of the cutting edge cutting device that allows the operator to automatically cut the drill edge at the correct angle at the exact position of the drill with a minimum of operation.

The present invention has been conceived in order to solve the above-mentioned conventional problem, the object of the present invention is to automatically incline the correct inclination angle and size in the correct position in the state of the operator to minimize the involvement of the two inclined blades formed on the tip of the drill To make it work.

In order to solve the above technical problem, in the present invention, the transfer pedestal 110 is installed on the bottom surface and the plate surface is installed to be linearly moved back and forth; The main body 121 is coupled to the transfer pedestal, the guide rail 123 fixedly coupled to the main body in the longitudinal direction, one side end is coupled to the main body as the first inclined surface (122c) is formed on the upper portion of the rear and lower A guide unit 120 including an inclined plate 122 having a second inclined surface 122d extending obliquely from the first inclined surface and a swing handle 121b rotatably coupled to the main body; An elevating block 133 having a guide groove 133a having a shape corresponding to an outer shape of the guide rail 123 and coupled to the main body, the main body 131 having a concave elastic rod receiving portion 131a formed therein, The front of the hinge pin (135a) is inserted through the upper side by the contact spring 137 is inserted between the pressing plate 134 is inserted into the elastic rod receiving portion and coupled to the main body 131. An elevating unit (130) comprising an elastic push rod (132) receiving a facing elastic force and a side plate (138) coupled to the side end of the elastic push rod and rotatably mounted with a bearing (138a) at its front end portion; And a casing 141 coupled to the elevating unit and having a through hole 141b formed therein, and a drill chuck coupling pipe 142 and a drill 150 inserted into the casing to be rotatably mounted. A drill fixing unit 140 including a drill chuck 151 inserted through the drill chuck coupling pipe and coupled thereto; It provides a drill blade cutting device characterized in that it comprises a.

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Here, a rack gear casing 139a having a front side open and a rear side closed at the lower end of the side plate 138 of the elevating unit 130 is coupled, and a bearing 139c is formed at the front end of the rack gear casing. The rack gear 139b rotatably mounted is inserted into the sliding gear, and the pinion gear 143a meshing with the rack gear is rotatably coupled to the side of the casing 141.

In addition, the casing 141 of the drill fixing unit 140 is formed with a switching device receiving hole (141c), the rotation angle conversion device 148 is inserted into the switching device receiving hole, the drill chuck coupling pipe 142 It is preferable that the switching notches 142c are formed at positions facing each other on the outer circumferential portion of the s).

According to the drill blade cutting device of the present invention, it is possible to process both inclined blades positioned to face each other at the leading end of the drill so as to be symmetrical to the exact position at the correct position. Therefore, it is not necessary to correct the work to meet the inclination angle and the size of the drill blade after the end of cutting.

In addition, according to the present invention it is possible to finish the cutting edge of the inclined blade as well as the cutting process of the inclined blade in one process, there is an advantage that the work process is simple and the process time is shortened.

In addition, according to the present invention, the operator can solve the safety problem of the operator by the grinding machine that rotates at high speed because the cutting process of the drill blade is automatically and accurately performed only by operating the swing handle.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the configuration and operation of the present invention.

1 is a perspective view of an overall appearance of a drill cutting device according to the present invention, Figure 2 is a perspective view of the combination of the upper configuration and the lower configuration of the drill cutting device according to the present invention, Figure 3 is an important of the drill cutting device according to the present invention 4 is an exploded perspective view of the lifting unit of the present invention, and FIG. 5 is an exploded perspective view of the drill fixing unit of the present invention.

As shown, the drill cutting device 100 of the present invention is largely composed of a feed pedestal 110, guide unit 120, lifting unit 130 and the drill fixing unit 140.

The transport pedestal 110 is for supporting and transporting the guide unit 120 from the lower side of the guide unit 120. The lower base 111 and the lower base 111 are disposed on the bottom surface of the lowermost base 111. It is connected to the end of the screw shaft 114 and the screw shaft 114 and the screw shaft 114 is coupled to the lower end base 111, the screw and the spiral mounting to the transport base 112 so that the linear movement is possible It consists of a motor 113 for imparting a rotational force. Therefore, when the motor 113 transmits a rotational force to the screw shaft 114 and rotates the screw shaft 114, the transport holder 112 is linearly moved back and forth by spirally moving on the screw shaft 114. The transfer unit 112 is coupled to the guide unit 120 to be described later.

The guide unit 120 is coupled to the conveyance mount 112 in order to elevate the elevating unit 130 and the drill fixing unit 140 to be described later, up and down, the guide unit body 121, the inclined plate 122, The guide rail 123, the rotating plate 124, the support base 125, the horizontal transfer guide 126, and the screw shaft 127a are configured to be included. The inclined plate 122 and the guide rail 123 are fixed to the guide unit body 121, and the swing handle 121b is rotatably attached. The lower end of the guide unit body 121 is fixed to the rotating plate 124 rotatably coupled to the lower support base 125. The support base 125 is a plate-like component coupled to a pair of horizontal transfer guides (126a, 126b) close to both side ends. The horizontal conveyance guides 126a and 126b are coupled to the conveyance mount 112 using fastening means such as bolts or screws. Reference numeral 112a in the drawing represents a bolt fastening hole for coupling the horizontal conveying guides (126a, 126b) to the conveyance mount 112.

The end of the screw shaft 127a rotatably supported by the screw shaft support 127c is rotatably coupled to the support base 125. The screw shaft support 127c is fixedly coupled to the transfer mounting 112 by bolts or screws. Therefore, when the user grasps and rotates the handle 127b formed at the other end of the screw shaft 127a, the support base 125 is guided by the horizontal transfer guides 126a and 126b while the screw shaft 127a is rotated. Go straight.

The screw shaft 114 and the screw shaft 127a rotatably coupled to the support base 125 are spirally coupled to the transport holder 112, respectively, to linearly move the transport mount 112 and the support base 125 back and forth. It is intended to be configured as a manual type to rotate by hand or an automatic type to rotate by a motor or the like, and is not limited to any one form.

The inclined plate 122 is to allow the bearing 138a rotatably mounted to the side plate 138 of the elevating unit 130 to be described later and the bearing 139c mounted to the rack gear 139b to be in contact with and rolled. The hinge unit 122a and the fixing screw 122b are coupled to the guide unit body 121.
As shown in FIG. 2, the direction in which the tip edge of the drill 150 is located is referred to as the front, and the direction in which the drill chuck 151 is located as the rear is shown on the rotating plate 124 on the rear surface of the inclined plate 122. Two plate surfaces having different inclination angles formed with the guide rail 123 installed vertically are continuously formed. That is, the first inclined surface 122c is formed on the upper plate surface of the rear surface of the inclined plate 122, and the first inclined surface 122c is formed on the lower plate surface so that the inclined angle formed with the guide rail 123 is larger than the first inclined surface 122c. ), A second inclined surface 122d is formed. Accordingly, the plate surface is divided up and down on the plate surface of the inclined plate 122 to have two different inclination angles forming the guide rail 123.
The reason for doing this is that the bearing 138a of the side plate 138 and the bearing 139c of the rack gear 139b both descend on the first inclined surface 122c on the inclined plate 122, and then the rack gear 139b. Is to allow the bearing 139c to descend on the second inclined surface 122d at the bottom so that the rack gear 139b can be retracted back. This is because the pinion gear 143a meshed with the retracting rack gear 139b can rotate. Details thereof will be described later.

The inclination angle of the inclined plate 122 with respect to the vertical direction may be adjusted using the fixing screw 122b. That is, when it is necessary to adjust the inclination angle of the inclined plate 122, loosen the fixing screw 122b, rotate the inclined plate 122 by the desired angle around the hinge pin 122a, and then fasten the fixing screw 122b again. do. Therefore, although not shown in the drawing, it is preferable that a plurality of fastening holes are formed at a portion to which the fixing screw 122b of the guide unit body 121 is coupled so that the fixing screw 122b can be fastened to a changed position. Do.

The guide rail 123 is provided to guide the vertical movement of the lifting unit 130, which will be described later, is installed perpendicular to the rotating plate 124.

The swing handle 121b is rotatably coupled to the upper portion of the guide unit body 121, and the pressing spring receiving portion 121a is coupled to the lower portion so that the pressing spring 136 to be described later is inserted.

The elevating unit 130 is a elevating unit body 131, elastic rod 132, elevating block 133, pressure plate 134, pressure spring 136, close contact spring 137, side plate 138 and rack gear It is configured to include a unit 139. An elastic rod accommodating part 131a is formed at the center of the elevating unit main body 131, and an elastic rod 132 is inserted therein.

A spring accommodating groove 132a is formed on the rear surface of the elastic rod 132, and a hinge pin coupling hole 132c penetrates on one side of the upper surface. In addition, a fastening hole 132b for a fastening screw 138c for engaging with the side plate 138 is formed on the opposite side of the hinge pin coupling hole 132c. A hinge pin through hole 131b is formed in the elevating unit main body 131. When the elastic push rod 132 is inserted into the elastic push rod receiving portion 131a, the hinge pin 135a is connected to the hinge pin through hole 131b. And coupled to the hinge pin coupling hole (132c) to allow the elastic rod 132 to rotate about the hinge pin (135a). Therefore, the width of the side of the elastic push rod receiving portion 131a should be formed larger than the side width of the elastic push rod 132 so that the elastic push rod 132 can be hinged back and forth by the close contact spring 137. Reference numeral 135b denotes a nut engaged with the end side of the hinge pin 135a.

The pressure plate 134 is for elastically supporting the elastic push rod 132 inserted into the elastic push rod receiving portion 131a to the front, and is coupled to the rear surface of the elevating unit main body 131 using a screw. In the drawings, reference numeral 134a denotes a fastening hole, and 134b denotes a fastening screw. Since the close contact spring 137 is located between the elastic push rod 132 and the pressure plate 134, the elastic push rod 132 is always pushed forward by the elastic force of the close contact spring 137.

An elevating block 133 is coupled to the rear side of the elevating unit body 131, and the elevating block 133 is formed with a guide groove 133a extending vertically. The guide groove 133a is for coupling the lifting block 133 to the guide rail 123, which will be described later, and the lifting unit 130 descends on the guide rail 123 by the manipulation of the swing handle 121b. It is to make it possible.

A pressure spring 136 is mounted to a lower portion of the elevating unit main body 131, and a lower end portion of the pressure spring 136 is inserted and supported by the pressure spring receiving portion 121a of the guide unit 120.

In the drawing, reference numeral 131c denotes a hinge pin through hole, 131d denotes a fastening hole, and 133b denotes a fastening bolt for fixing and coupling the elevating block 133 to the elevating unit body 131.

One side of the elastic rod 132 is fixed to the side plate 138 by a fastening screw (138c). A bearing 138a is rotatably coupled to one end of the side plate 138. Unexplained reference numeral 138b of the figure is for coupling with the casing 141 to be described later as a fastening bolt to pass through the side plate.

A bearing accommodation hole 138e is formed in the side plate 138 so that the pinion rotation bearing 149, which will be described later, is forcibly fitted. In the drawings, reference numeral 138d denotes a fixing plate for fixedly coupling the cylindrical protrusion 141d formed on the side of the casing 141 to the side plate 138 to be described later.

The rack gear part 139 is coupled to the lower end of the side plate 138, the rack gear part 139 is composed of a rack gear casing 139a and a rack gear 139b inside the rack gear casing. As shown, one end of the rack gear casing (139a) is open and the other end is closed, a portion of the upper surface is opened so that the gear teeth of the rack gear (139b) is partially exposed. A bearing 139c is rotatably mounted at one end of the rack gear 139b exposed to the outside of the rack gear casing 139a, and the other end of the rack gear 139b is slidable into the rack gear casing 139a. Is inserted. A compression spring (not shown) is positioned between the other end of the rack gear 139b inserted into the rack gear casing 139a and the inner wall of the rack gear casing 139a so that the rack gear 139b pushes forward. To provide elastic force. By doing so, the bearing 139c installed at one end of the rack gear 139b can be lowered while maintaining elastic contact with the first inclined surface 122c and the second inclined surface 122d of the inclined plate 122. . When the bearing 139c of the rack gear 139b descends on the first inclined surface 122c of the inclined plate 122 and enters the second inclined surface 122d, the horizontal retraction distance of the rack gear 139b becomes the side plate. The retracting distance of the rack gear casing 139a fixed to 138 becomes larger. Therefore, the rack gear 139b slides backwards in the rack gear casing 139a, and at the same time, rotates the pinion gear 143a engaged with the rack gear 139b to slightly rotate the blade tip end of the drill. Will be. Details thereof will be described later.

The drill fixing unit 140 is coupled to the lifting unit 130, the casing 141, the drill chuck coupling pipe 142, the rotating body 143, the radial bearing 144, the thrust bearing 145, the inner side And outer locking rings 146 and 147.

The casing 141 has a through hole 141b formed at the center thereof so that the drill chuck coupling pipe 142 may be inserted therethrough, and a bearing accommodation portion 141a is formed at one end thereof. The side of the casing 141 is formed through the switching device receiving hole (141c), the rotation angle switching device 148 is inserted therein. The rotation angle switching device is a kind of ball plunger and is composed of a spherical ball 148a, a spring 148b, a bolt 148c and a nut 148d. The rotation angle switching device 148 adjusts the rotation angle of the drill by elastic contact with the switching notch 142c formed on the outer circumferential surface of the cylindrical body 142a of the drill chuck coupling tube at intervals of 180 ° from each other.

The drill chuck coupling pipe 142 is a drill chuck 151 inserted through the drill 150 is formed to be stepped on the cylindrical body 142a and the one end side of the cylindrical body 142a having a hollow tube shape as a whole. It consists of the stepped 142b. As described above, two corresponding switching notches 142c are formed in the outer circumferential surface of the cylindrical body 142a at half positions in the circumferential direction, one on the outer circumferential surface of the position avoiding the switching notch 142c. Thread 142d is formed. Reference numeral 142e is a fixing bolt for screwing through the drill chuck coupling pipe 142 to press and fix the outer circumferential surface of the drill chuck 151 inserted into the drill chuck coupling pipe 142. It is for.

On the inner circumferential surfaces of the inner and outer locking rings 146 and 147, female threads 146a and 147a for screwing into the male threads 142d of the cylindrical body 142a are formed, respectively. The thrust bearing 145 and the rotary rings 145a and 145b attached to the front and rear of the thrust bearing 145 are mounted to the bearing accommodation portion 141a of the casing 141.

A cylindrical protrusion 141d is formed at a side of the casing 141 where the rotation angle switching device 148 is not mounted, and the outer body of the cylindrical protrusion 141d has a rotating body 143 and a pinion rotating bearing ( 149) is rotatably coupled in order.

The rotating body 143 is divided into two parts. The outer circumferential surface of the upper semicircle of the circular rotating body 143 is formed with a ruler 143b, and the pinion gear 143a is formed on the outer circumferential surface of the lower semicircle. That is, gear teeth are formed only on a part of the outer circumferential surface of the rotating body 143. The pinion gear 143a meshes with the rack gear 139b.

Referring to the method and principle for cutting a drill blade using the drill blade cutting device 100 of the present invention having such a configuration as follows.

First, by rotating the screw shaft 114 of the feed bracket 110 and the screw shaft 127a of the guide unit 120, the drill blade mounted on the drill fixing unit 140, as shown in FIG. It is located close to the grinding wheel 210 of (200). By moving the feed rod 112 forward by the rotation of the screw shaft 114 of the transfer support 110 to roughly move the position of the drill blade close to the grinding wheel 210, the screw of the guide unit 120 While holding the shaft handle 127b, the screw shaft 127b may be rotated to precisely adjust the approach position of the drill blade.

At this time, the drill blade tip 150c of the first inclined blade 150a of FIG. 6 faces upwards, and the drill blade approaches the surface of the grinding wheel 210 so that the drill blade rear end 150d faces downward. .

Next, the grinding wheel 210 is rotated by applying power to the grinding machine 200 in a state in which the rear end 150d of the drill blade is slightly in contact with the grinding wheel 210.

Now, the swing handle 121b is rotated and placed on the swing handle support 131e, and then the swing handle 121b is pushed down. Then, the lifting unit 130 rides down the guide rail 123 of the guide unit 120 to compress the pressure spring 136 and descends downward. At this time, the elevating unit 130 is a bearing 138a attached to the side plate 138 and a bearing 139c attached to the rack gear 139b are elastically in close contact with the inclined surface of the inclined plate 122 and ride on the inclined surface. As you roll down, you do not straight down, but down. That is, the lifting unit 130 is to be lowered down in the direction in which the plate surface of the inclined plate 122 is inclined.

At this time, the drill fixing unit 140 fixedly coupled to the elevating unit 130 is also lowered, and since the rear end of the drill blade is already in contact with the grinding wheel 210, the drill is inclined from the rear end of the drill blade to the tip portion. The blade is cut.

Thereafter, the pinion gear 143a rotates as the rack gear 139b retreats from the moment when the bearing 139c of the rack gear 139b enters the second inclined surface 122d, and the pinion gear 143a rotates. As the fixed casing 141 rotates slightly, the tip of the drill blade is rotated to a certain extent downward. This makes it possible to cut gently so that the tip of the drill blade is not too sharp. That is, the reason why the tip end portion 150c of the drill blade is slightly rotated at the end stage of the cutting process is that the tip portion 150c of the drill blade is in direct contact with the object to be drilled when the drill is rotated. This is because the drill blade wears easily when sharply machined.

6 is a perspective view of a drill in which the inclined blade of the drill is observed from the front side, and FIG. 7 is a conceptual view illustrating an operating principle of a drill cutting device according to the present invention.

Typically, the drill blade is formed with a first inclined blade 150a and a second inclined blade 150b to face each other at a position that forms an angle of 180 ° in the circumferential direction. The inclination angles of the first and second inclined blades 150a and 150b should be the same, and each of the inclined blades 150a and 150b includes a drill blade front end portion 150c and a drill blade rear end portion 150d. The drill blade tip portion 150c is a portion that directly contacts the workpiece when the drill 150 is to rotate to form a hole in the workpiece.

Therefore, as described above, the tip of the drill blade is finished by slightly rotating the pinion gear 143a at the end of the drill blade processing. That is, the angle of the inclined blade of the drill is changed depending on the type of drill, the purpose of use, and the material of the workpiece. The tip of the drill blade 150c, which is a part in direct contact with the workpiece, must be processed so as not to be too sharp to damage the drill blade. It can be prevented and its life will be extended.

As shown in Figure 7, using the drill cutting device 100 of the present invention it is possible to accurately and quickly and efficiently cut the first and second inclined blades (150a, 150b) of the drill at the same inclination angle . First, the drill blade rear end portion 150d of the first inclined blade 150a to be processed is placed in close proximity to the grinding wheel 210, and then the lifting unit 130 is lowered, and the drill fixing unit 140 fixed thereto is inclined. Direction is moved downward in the diagonal (TS) direction. Therefore, the inclined blade is cut in accordance with the inclination angle of the inclined plate from the rear end to the front end of the first inclined blade 150a. At this time, the elastic rod 132 to which the drill fixing unit 140 is coupled is always in a state of receiving an elastic force directed toward the front by the contact spring 137, so that the inclined blade of the drill maintains contact with the grinding wheel 210. Can be.

Figure 7 (a) shows the initial stage of the drill blade processing, Figure 7 (b) shows the boil step to process the drill blade by lowering the lifting unit 130. When the lifting unit 130 descends due to the operation of the swing handle 121b, the coordinate of the center O of the drill moves from (x, y) to (x ', y') which is moved downward from the drill handle. When the final step of the drill 150 is rotated by a predetermined angle (α) due to the rotation of the pinion gear (143a). Therefore, the tip portion 150c of the drill blade is prevented from being processed too sharply and finished smoothly. In the drawing, 'HL' represents a horizontal line, and 'CL' represents a line extending the central axis of the drill 150. In addition, "(theta)" of the figure shows the inclination angle of the plate surface of the inclined plate 122 with respect to a perpendicular line.

When the processing of the first inclined blade (150a) is completed by the above-described process, this time by holding the drill chuck 151 and rotating it to position the rear end of the second inclined blade (150b) close to the grinding wheel (210). Since the drill chuck 151 is inserted into and fixed to the drill chuck coupling pipe 142, when the drill chuck 151 is rotated, the drill chuck coupling pipe 142 rotates together, and is formed in the cylindrical body 142a of the drill chuck coupling pipe 142. It is possible to rotate the drill 150 by exactly half a turn (180 °) by the conversion notch 142c. That is, when the drill 150 is rotated by a half turn, the ball 148a of the switching device 148 is caught by the switching notch 142c, so that the drill 150 can be rotated precisely by 180 °. In this way, the second inclined blade 150b formed at a position rotated circumferentially by exactly 180 ° with the first inclined blade 150a of the drill can be cut in the same manner as in the case of the first inclined blade 150a. It is very convenient to be able to do it.

Although the gist of the technical configuration of the present invention and its operation principle have been described with reference to the preferred embodiments, the scope of the present invention should not be construed as being limited thereto. That is, in the case of the screw shaft of the present invention for linearly moving the drill back and forth may be replaced by equivalent means such as a linear motor and a sliding guide for the same purpose or function. In addition, in the case of the inclined plate 122, the first inclined surface 122c and the second inclined surface 122d are integrally formed in this embodiment, but may be formed by separating them into separate inclined plates.

1 is a perspective view of the overall appearance of a drill cutting device according to the present invention.

Figure 2 is a perspective view of the combination of the upper configuration and the lower configuration of the drill cutting device according to the present invention.

Figure 3 is a perspective view of the combination of important components of the drill cutting device according to the present invention.

4 is an exploded perspective view of the lifting unit of the present invention.

5 is an exploded perspective view of the drill fixing unit of the present invention.

6 is a perspective view of the drill in which the inclined blade of the drill is observed from the front side;

7 is a conceptual diagram for showing the operating principle of the drill cutting device according to the present invention.

8 is a front view of a conventional drill blade grinding machine.

<Explanation of symbols for the main parts of the drawings>

100: drill cutting device 110: feed support

111: lower base 112: transport rod

113: motor 114: screw shaft

120: guide unit 121: guide unit body

121a: pressure spring receiving portion 121b: swing handle

122: inclined plate 123: guide rail

124: rotating plate 125: support base

126a, 126b: horizontal feed guide 127a: screw shaft

130: elevating unit 131: elevating unit body

131a: elastic rod receiving portion 132: elastic rod

133; Lifting block 133a: guide groove

134: pressure plate 135a: hinge pin

136: pressure spring 137: contact spring

138: side plate 138a: bearing

138b: Fastening bolt 139: Rack gear part

139a: rack gear casing 139b: rack gear

140: drill fixing unit 141: casing

142: drill chuck coupling pipe 142c: switching notch

143: rotating body 143a: pinion gear

144: radial bearing 145: thrust bearing

146,147: lock ring 150: drill

150a, 150b: bevel blade 151: drill chuck

200: grinding machine

Claims (3)

A transfer pedestal 110 positioned on the bottom surface and installed in such a manner that the plate surface is linearly moved back and forth; The main body 121 is coupled to the transfer pedestal, the guide rail 123 fixedly coupled to the main body in the longitudinal direction, one side end is coupled to the main body as the first inclined surface (122c) is formed on the upper portion of the rear and lower A guide unit 120 including an inclined plate 122 having a second inclined surface 122d extending obliquely from the first inclined surface and a swing handle 121b rotatably coupled to the main body; An elevating block 133 having a guide groove 133a having a shape corresponding to an outer shape of the guide rail 123 and coupled to the main body, the main body 131 having a concave elastic rod receiving portion 131a formed therein, The front of the hinge pin (135a) is inserted through the upper side by the contact spring 137 is inserted between the pressing plate 134 is inserted into the elastic rod receiving portion and coupled to the main body 131. An elevating unit (130) comprising an elastic push rod (132) receiving a facing elastic force and a side plate (138) coupled to the side end of the elastic push rod and rotatably mounted with a bearing (138a) at its front end portion; And The casing 141 is coupled to the lifting unit and the through hole 141b is formed therein, and is used to fix the drill chuck coupling pipe 142 and the drill 150 to be inserted into the casing so as to be rotatable. A drill fixing unit 140 formed of a drill chuck 151 inserted into and coupled to the drill chuck coupling pipe; Drill cutting device, characterized in that configured to include. The method of claim 1, A rack gear casing 139a having a front side open and a rear side closed is coupled to a lower end of the side plate 138 of the elevating unit 130, and a bearing 139c is rotatable in a front end portion of the rack gear casing. The rack gear (139b) to be mounted is slidably inserted, and the pinion gear (143a) to be engaged with the rack gear on the side of the casing (141) rotatably coupled to the drill cutting device. 3. The method according to claim 1 or 2, The casing 141 of the drill fixing unit 140 is formed with a switching device receiving hole (141c), the rotation angle switching device 148 is inserted into the switching device receiving hole, the drill chuck coupling pipe 142 of Drilling edge cutting device, characterized in that the switching notch (142c) is formed on the outer peripheral portion facing each other.

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