KR200383022Y1 - A Cutting Tool with a High Speed Cutter For Cutting a Face in Radial Type - Google Patents

Abstract

The present invention relates to a cutting tool having a high speed cutter for radial face machining that can be used in a machining center, and specifically, the surface can be machined in a radial shape to allow fine adjustment by installing a clamp on the side. It is a cutter and also relates to a cutting tool with a balancing adjusting screw for high speed machining. Cutting tool according to the present invention is a tool body formed in a circular shape; At least two cutting inserts installed in front of the tool body; A tool holding part including a clamp and a fixing screw for fixing or dismounting the cutting insert to the tool body; A tool adjusting unit including first and second screws for vertically adjusting the cutting insert; It includes a balancing screw installed on the tool body to reduce the rotational vibration, wherein the clamp is inclined form is characterized in that the fixed or disassembled by the rotation of the fixing screw.

Description

A cutting tool with a high speed cutter for cutting a face in radial type

The present invention relates to a cutting tool having a high-speed cutter for the radial surface processing that can be used in the machining center, and specifically provided with a cutter that can be radially processed by installing a clamp on the side to finely adjust It relates to one cutting tool.

In general, when the machining surface requires precision, securing the precision and shortening the machining time are important problems. As a method for precise machining of such a machining surface, a method of performing a contour machining as shown in FIG. 1A using an end mill tool in a machining center was used.

In the above method, the plane is machined in the same manner as shown on the left using the cutter 101 installed at the end of the bag 102 fixed to the holder 103 as shown in FIG. However, when machining in this way, the lack of rigidity of the tool and the adjustment of the deviation of the insert is difficult, so that it is difficult for the squareness and the flatness to fall within the range of error, and the surface roughness worsens, resulting in a high defect rate. As a method for solving such a problem, a multi-type boring tool having an adjustment type as shown in FIG. 1B has been proposed.

As shown in FIG. 1B, the method allows the position of the cutter 101 to be adjusted by adjusting screws to enable more precise machining. However, even in the case of the multi-type boring tool of this type of adjustment, it is difficult to have the squareness and the flatness fall within the error range, and the surface roughness is deteriorated, so that the defect rate is high. Another method proposed to solve this problem is to process with a turning tool in a lathe such as shown in Figure 1c.

As shown in FIG. 1C, the cutter 101 at the end of the bag 102 fixed to the holder 103 forms a constant inclined surface to allow more precise machining. However, since the method adopts a method of processing a separate process, there is a problem in that concentricity defects generated by the jig and the equipment occur due to squareness and process dispersion, and it is difficult to secure the required production quantity.

Prior patents relating to end mills include Patent Application No. 10-1006-0006753 “Through-away ball end mills”. In the case of the attachment of the tip to the end mill body, the patent allows the tip to be firmly fixed while automatically aligning the center line of the tip with the center line of the end mill body, and to significantly improve the finishing accuracy of the workpiece. For the purpose of In order to achieve the above object, the present invention forms a bottom portion of the tip side cutout portion of the end mill body on an arc-shaped tip support surface, and forms a conical support surface biased proximal to one side of the cutout side portion, and at the same time a rear end portion of the tip. It is characterized in that to form an arc-shaped curved surface greater than or equal to the radius of curvature of the tip support surface, the tip inserted into the cutout of the end mill body is fixed by the clamp screw portion.

Another patent for an end mill is patent application No. 10-1999-0009800, "Indexable Type Milling Ball End Mill." The patent is an indexable milling ball end mill that improves the degree of processing, surface roughness and high depth of cutting by fastening the cutting insert for cutting into the body simply, quickly, precisely and powerfully using screws and clamps. The purpose is to provide. In order to achieve the above object, the patent provides a V-shaped reference plane in the rear end of the cutting insert and the body, respectively, and the vertical direction of the cutting insert inserted into the head of the body by clamping the clamp screw and the stop ring. By contacting the protruding end of the movable clamp is characterized in that the insert reference plane is in close contact with the slot reference plane of the body and at the same time to secure the insert. In addition, by providing a fastening screw that is fastened to the cutting inserts and through-holes provided separately in the body and tightening the fastening screw, the force to induce elastic deformation of the upper and lower surfaces of the body and the resulting fixing force are added to the cutting insert. To ensure strong clamping.

However, none of the known inventions presented discloses a cutting tool that can be finely adjusted in diameter, height and length direction and fixed in the length direction using side clamps.

The present invention is to solve the problems with the known invention as described above has the following objectives.

The purpose of the present invention is to provide a Carter for high speed machining by adjusting the balance by the surface machining and balancing adjustment screw that can ensure the precision by precisely adjusting the tool externally. It is to provide a cutting tool provided.

According to a suitable embodiment of the present invention for achieving the object presented, the cutting tool according to the present invention comprises a tool body formed in a circular; At least two cutting inserts installed in front of the tool body; A tool holding part including a clamp and a fixing screw for fixing or dismounting the cutting insert to the tool body; A tool adjusting unit including first and second screws for vertically adjusting the cutting insert; It includes a balancing screw installed on the tool body to reduce the rotational vibration, wherein the clamp is inclined form is characterized in that the fixed or disassembled by the rotation of the fixing screw.

According to another suitable embodiment of the present invention, the tool fixing portion is characterized in that it is installed on the side of the tool body.

According to another feature of the present invention, the cutting insert includes an inclined edge and a groove coupled to the second screw and the first screw, respectively, wherein the end portion of the second screw may be in contact with the inclined edge. Characterized in that it is formed.

According to another suitable embodiment of the present invention, the cutting insert, the tool holding portion and the tool adjusting portion are characterized in that the pair is installed symmetrically on the tool body.

According to another suitable embodiment of the present invention, the cutting insert is characterized in that six or three pairs.

According to another suitable embodiment of the present invention, the method of adjusting the cutting insert upwards or downwards is characterized by consisting of a method of finer adjustment by the second screw after adjusting the first screw.

According to another suitable embodiment of the present invention, the direction of the machining trajectory by the cutting insert is characterized in that the radial shape is straight or circular.

According to another suitable embodiment of the present invention, the balance screw is at least two and the at least two balance screws are installed along the circumferential surface of the tool body.

According to another suitable embodiment of the present invention, the cutting insert can be of an integral or interchangeable form for high precision.

In the following the invention is described in detail by using the accompanying drawings as an embodiment. However, the presented embodiments are not intended to limit the scope of the present invention as illustrative.

FIG. 2A shows a full sectional view of a cutting tool 2 with an adjustable face cutter according to the present invention, and FIG. 2B shows a partial sectional view.

As shown in FIG. 2A or 2B, the cutting tool 2 with the adjustable face machining cutter according to the present invention comprises a tool holder 21 and a tool body 22.

The tool body 22 can be made independently in the form of a circular cross-sectional area and bolted to a tool holder 21 that can be fixedly coupled to a spindle (not shown). The engagement of the tool holder 21 and the tool body 22 and the connection with the spindle can be made according to methods known in the art. However, the method according to the present invention is characterized in that the tool body 22 is manufactured separately as a form having a circular cross-sectional area and coupled to the tool holder 21. Such a shape of the tool body 22 having a circular cross-sectional area according to the present invention has a sufficient balance with respect to the rotation of the spindle even when machining is performed in a machining center that rotates at a high speed of up to about 30,000 rpm. It is possible to reduce the machining time. Therefore, the cutting tool 2 according to the present invention is independently manufactured to have a circular cross-sectional area and connected to the tool holder 21 in order to reduce or balance the rotational vibration resulting from such high speed rotational machining. It features a tool body 22.

The tool body 22 includes a tool insert 24 for fixing the cutting insert 25 using a cutting insert 25, a clamp 241, and a fixing screw 242 having a cutter 251 installed at an end thereof, A tool adjusting portion 23 for finely adjusting the height of the cutting insert 25 using the first screw 231 and the second screw 232, and a balancing screw 221.

As shown in FIG. 2B, the clamp 231 has a tapered shape, and the method of finely adjusting the cutting insert 25 as the clamp 241 using the fixing screw 242 is as follows. Moving the clamp 231 downward using the fastening screw 242 secures the cutting insert 25 to the tool body 22 and disengages it from the tool body 22 when moving upwardly. As shown in FIG. 2B, the end inserted into the tool body 22 of the cutting insert 25 is formed with an inclined edge. And the outer portion of the inclined edge is formed with a coupling groove. The second screw 232 of the tool adjusting part 23 is connected to the inclined edge, and the groove is coupled to the first screw 231. As shown in FIG. 2B, the end portion of the second screw 232 is formed to be in contact with the end portion of the inclined edge. The method for adjusting the cutting insert 25 according to the present invention formed as described above is to rotate the first screw 231 of the tool adjusting unit 23 counterclockwise to the required angle, and then clock the second screw 232. Turn it in the direction. On the contrary, in the method of adjusting the cutting insert 25 downwardly, the second screw 232 of the tool adjusting part 23 is rotated counterclockwise, and then the first screw 231 is rotated clockwise to fine as much as desired. Make adjustments. As such, after adjusting the cutting insert 25 height by the tool adjusting unit 23, the fixing screw 242 of the fixing unit 24 is fixed while turning clockwise. Another feature of the present invention is that the high speed machining is possible by fine tool balance (Fine Tool Balance) by the balance screw 221 for balancing the tool.

As shown in FIG. 2B, the cutting insert 25, the tool adjusting part 23, and the tool fixing part 24 may be installed in a predetermined number, for example, six, in the circumferential tool body 22. The number of cutting inserts 25 to be installed can vary as needed or can be arranged at any interval along the circumference of the tool 22, but preferably six can be arranged symmetrically with each other. 2A shows a cross-sectional view of a pair of cutting inserts 25 and an apparatus for adjusting them, which are arranged symmetrically with one another in an exemplary embodiment. On the other hand, the balance screw 221 for adjusting the balance of the tool may be installed equal to or the same as the number of the cutting inserts 25. Clamp 231 according to the present invention can be installed in a way that can be fixed from the side, such as lathes or milling. The fixing screw 242 for adjusting the clamp 241 installed as described above is capable of rotation for adjustment at the cutter side of the cutting insert 25, and the first screw 231 and the second screw of the tool adjusting unit 23 are Clockwise or counterclockwise rotation is possible on the side for fine adjustment. The cutting insert 25 connected to the front part for cutting can be made of a cemented carbide material which is a material known in the art or a general alloy steel as required.

3 (a) and (b) is a cross-sectional view of the form of the workpiece 3 that can be processed using a cutting tool according to the present invention and the present invention in terms of the processing of the workpiece 3 The machining trajectory to the machining surface of the cutting tool according to the present invention is shown.

The cutting tool according to the present invention can machine a cutting tool known in the art, such as a plane, a curved surface or an inner surface, for example, a surface that an end mill can process. 3 (a) and 3 (b) illustrate processing the plane of the inner surface in the form of a circle.

As shown in (a) and (b) of FIG. 3, the processing surface P is connected to a flat surface and requires a precise processing.

3, (a) shows that the machining trajectory is parallel to the radial direction of the machining trajectory with respect to the machining surface P, and (b) shows that the machining trajectory is circular. Looking in more detail in the form shown in Figure 3 (b) in which the trajectory of the cutting form of the machining surface (P) is circular, the trajectory by the cutting tool according to the present invention is the circumference of the inner surface and the outer surface of the outer surface It characterized in that the contact with the circumference of the machining surface. In other words, the circumference of the inner surface is inscribed with the circumference of the machining trajectory and the circumference of the outer surface is circumscribed with the circumference of the machining trajectory. The circumference of the machining trajectory is continuously connected along the circumference of the inner or outer surface. As shown in (a) and (b) of FIG. 3, the machining trajectory by the cutting tool according to the present invention is assumed to be in the radial form of the workpiece. In other words, as shown in (a), when processing in a straight line, the circular machining trajectory may be moved from the inside to the outside of the processing trajectory even when the circular processing trajectory is made in the radial direction. have. In this specification, the parallel processing or the radial movement in the radial direction of the processing trajectory is referred to as radial processing. The formation of such a machining trajectory is made to meet the tolerance in the squareness and plan view with respect to the known design and also to reduce the machining time. The shape of the processing trajectory shown in FIG. have. These are among the things that one of ordinary skill in the art can adopt as needed.

Figure 4 shows an exploded view of the cutting tool according to the present invention.

As shown, the cutting tool according to the present invention includes a tool body 22 and a cutting insert 25, a fixing part 24, an adjusting part 23, and a balancing screw 221 installed on the tool body 22.

The cutting insert 25 may be an integral cutting insert 25 with a certain high precision relative to the tool body 22 or may be interchangeable depending on the workpiece. Cutting inserts 25 for high precision can be used, in particular, for higher densities, more precise machining or for special types of machining. And the replaceable cutting insert 25 can be used when a variety of forms of machining are required and the formation of such replaceable inserts can be made according to methods known in the art. The cutting insert 25 in one-piece or interchangeable form can be selected according to the needs of those skilled in the art, and both are applicable to the cutting tool according to the present invention. In addition, the shape of the cutter of the cutting insert 25 may be different depending on the processing form. For example, the cutter of the cutting insert 25 may be inclined for curved surfaces, and the inclination angle may be up to 60 degrees. The material or the inclination angle of the cutter may be determined according to the processing form of the processing material, the position or material of the processing surface, and the like.

The cutting insert 25 is inserted into the tool body 22 at the front of the tool body 22, and the clamp 231 of the tool holding part 24 is installed above the cutting insert 25. As shown in FIG. 4, the clamp 241 is inclined to allow finer adjustment of the cutting insert 25. The fixing screw 242 of the tool holding part 24 is inserted into the clamp hole in the clamp 241 to fix the cutting insert 25 using the clamp 241. The fixing screw 242 is rotated clockwise to fix the cutting insert 25. Thereafter, the first screw 231 and the second screw 232 of the adjusting unit 23 for adjusting the cutting insert 25 up and down are installed. As described above, the number of cutting inserts 25 may be plural and may be installed so as to be symmetrical with each other. At the rear of the tool body 22, a plurality of balancing screws 221 may be installed in a circle along the circumferential surface of the tool body 22 to reduce or balance vibration due to the rotation of the cutting tool. The cutting tool according to the present invention assembled in this way can be used to precisely process any surface such as a curved surface, a plane or an inner surface.

The cutting tool according to the present invention can reduce the precision and machining time of the machining surface when machining a precision part. The cutting tool according to the present invention enables to improve productivity by smoothly performing high speed machining, for example, 10,000 rpm or more, at the same time requiring perpendicularity, surface roughness and flatness of automobile parts and various mechanical parts.

The cutting tool according to the present invention has been described in detail as an embodiment. The embodiments presented are exemplary and one of ordinary skill in the art may make various modifications and variations to the embodiments without departing from the scope of the technical idea of the invention. The present invention is not limited by such modifications and variations, but only by the utility model claims attached below.

FIG. 1A shows a known end mill, FIG. 1B shows a known Multi Type Boring Tool, and FIG. 1C shows a known CNC lathe bore.

FIG. 2A shows a full sectional view of a cutting tool 2 with an adjustable face cutter according to the present invention, and FIG. 2B shows a partial sectional view.

3 (a) and (b) is a cross-sectional view of the shape of the workpiece that can be processed using the cutting tool according to the present invention and the machining of the cutting tool according to the present invention in terms of the processing of the workpiece The machining trajectory to the surface is shown.

Figure 4 shows an exploded view of the cutting tool having a surface machining cutter according to the present invention.

Claims (9)

A cutting tool for cutting of a workpiece surface comprising a holder coupled to a spindle at a machining center, A tool body formed in a circle; At least two cutting inserts installed in front of the tool body; A tool holding part including a clamp and a fixing screw for fixing or dismounting the cutting insert to the tool body; A tool adjusting unit including first and second screws for vertically adjusting the cutting insert; A balancing screw installed on the tool body for reducing rotational vibration, wherein the tool fixing part and the tool adjusting part are installed on the side of the tool body and the clamp is in an inclined shape by rotation of the fixing screw. The cutting tool, characterized in that the fixed or dismantled. The cutting insert of claim 1, wherein the cutting insert includes a beveled edge and a groove respectively coupled to the second screw and the first screw, wherein the end portion of the second screw is formed to be in contact with the beveled edge. A cutting tool characterized by the above-mentioned. The cutting tool according to claim 1, wherein the cutting insert, the tool holding part, and the tool adjusting part are symmetrically installed on the tool body. The cutting tool according to claim 3, wherein the cutting inserts are six, that is, three pairs. The cutting tool according to claim 1, wherein the method of adjusting the cutting insert upward or downward comprises adjusting the first screw more finely by the second screw. The cutting tool according to claim 1, wherein the direction of the machining trajectory by the cutting insert is radial or straight or circular.  The cutting tool according to claim 1, wherein the balancing screw is at least two and the at least two balancing screws are installed along the circumferential surface of the tool body. The cutting tool of claim 1, wherein the cutting insert can be integral or interchangeable for high precision. The cutting tool according to claim 1, wherein the cutter of the cutting insert has a maximum inclination angle of 60 degrees on the back side of the cutter in the case of curved processing.