KR20130021594A

KR20130021594A - Broaching tool and boach

Info

Publication number: KR20130021594A
Application number: KR1020110083949A
Authority: KR
Inventors: 오동관; 김진봉
Original assignee: 메탈릭스시스템(주)
Priority date: 2011-08-23
Filing date: 2011-08-23
Publication date: 2013-03-06

Abstract

The present invention relates to a broaching tool for processing various types of holes or grooves and a broach for processing an inner diameter spiral groove by attaching to the broaching tool, and specifically, for fixing a broach at the center of one end portion. Grooved body; And a holder having a rotating groove for mounting the body at a center of one end thereof, the holder having a center line of the rotating groove inclined to one side, and a broaching tool configured to be mounted on the broaching tool to process a material. I will.

Description

Broaching tool and broach

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a broaching tool for processing holes and grooves of various forms, and a broach for processing inner diameter spiral grooves by attaching to the broaching tool.

In general, broaching is a process in which an inner surface or an outer surface of a material is processed into a required shape by using a broaching tool, for example, an inner surface processing of a hole such as a gear or a polygon in the hole of the material. There is an external surface processing for gears and polygons on the outer surface of the material. At this time, the broaching is made by a broaching machine which advances at least one of the two while the material and the brooch are mounted, thereby cutting the broach while pushing the inner or outer surface of the material.

This broaching requires boring work, for example, to drill holes or grooves in the machining surface of the material before machining the material, resulting in a separate broaching machine with a machine tool such as a lathe or milling machine. There is a burden to be made.

In addition, when the material is processed using the broaching machine, the force acting on the broach and the cross section of the material is equally acting as a whole, so that the broach needs to press such a large amount of pressure, and the broach pushes out the material. The material or brooch breaks easily during the cutting process.

On the other hand, in the existing broaching machine using a broach, for example, to process the inner diameter spiral to a material having a thickness of 20mm, a broach having a length of 700mm is required, so it is difficult to manufacture a broach and it takes a lot of time to broach using the broach.

In other words, a drawing process is usually performed to form an inner diameter spiral on a material. In this case, if the inner diameter spiral of a desired diameter and pitch is processed at a time, the material and the brooch may be easily broken. This should be done. Accordingly, even in forming the broach, the diameter and pitch of the machining blade must be gradually increased in three to four steps, so that the overall length is inevitably long, which makes it difficult to produce the brooch, which takes a lot of time for broaching.

The present invention is to provide a broaching tool that can be easily mounted and used in a variety of machine tools, such as lathes, milling in addition to broaching dedicated machine tools.

The present invention seeks to provide a broaching tool which enables the processing of materials while simply replacing various types of broaches as necessary.

The present invention seeks to provide a broaching tool which concentrates the force on the workpiece and the brooch in the course of processing the workpiece.

The present invention seeks to provide a broach that allows for easy machining of inner diameter spirals on a material using a broaching tool.

Broaching tool of the present invention is formed in the form of a shaft, the body is formed with a fixing groove for mounting and fixing a brooch for processing any material in the center of one end; And a rotation groove is formed to rotate by mounting the body at the center of one end portion, and a coupling protrusion is formed at the other center to be coupled to any machine tool, and the center line of the rotation groove is inclined toward one side from the center line of the coupling protrusion. The holder; is configured to include.

The body has a first fixing hole penetratingly formed in a direction perpendicular to the center line of the fixing groove, is fastened to the first fixing hole is configured to include a first fixing bolt for tightly fixing the brooch.

The holder is formed by separating the front portion formed with the rotating groove and the rear portion formed with the engaging projection, and connecting means for adjusting and connecting any intersection point between the two center lines of the rotating groove and the engaging projection. .

The connecting means may each form a flange through which a fastening hole penetrates at an end portion facing the front portion of the holder in which the rotary groove is formed and the rear portion of the holder in which the coupling protrusion is formed, and through the fastening holes of the two opposite flanges. Is formed so as to be fastened to, the fastening hole on one side of the two flanges is formed with a diameter larger than the diameter of the fastening bolt, at least one second fixing hole is formed in a direction perpendicular to the center line, the second fixing hole It is configured to include a second fixing bolt to fasten the outer surface of the fastening bolt while fixing the position.

The body is fitted in the rotating groove with the front bearing and the rear bearing fitted from the rear, and the fixing nut is fastened so that the front and rear bearings do not fall out at the rear end, and the holder is mounted when the body is mounted inside the rotating groove. An annular engaging ring is formed to fit between the front bearing and the rear bearing.

The present invention is formed in the form of a shaft, the body formed with a fixing groove to mount a brooch for processing the material in the center of one end; And a rotation groove is formed to rotate by mounting the body at the center of one end portion, and a coupling protrusion is formed at the other center to be coupled to any machine tool, and the center line of the rotation groove is inclined toward one side from the center line of the coupling protrusion. A broach for mounting a broaching tool, comprising: a holder for processing the material at one end thereof, and a mounting for mounting the fixing groove at the other end thereof. It is formed into the shape of the same cross section as the shape for processing to a raw material.

The processing portion is twisted in the form of a screw turning in one direction while advancing along a central axial direction to form an inner diameter screw in the material.

A recessed groove is formed at the end of the processing portion.

According to the broaching tool of the present invention, by using the engaging protrusion formed at the rear of the holder, not only broaching machine tools, but also various lathes, milling and other general machine tools can be easily mounted and used, so that the convenience of use is further increased. There is an effect to be improved.

According to the broaching tool of the present invention, it is possible to easily replace and use various types of brooches through the body, thereby reducing the inconvenience of moving the material in the process of processing.

According to the broaching tool of the present invention, the centerline of the broach is inclined at a certain angle from the centerline of the workpiece so that the processing pressure on the workpiece and the broach is concentrated at one point, and this concentrated point is applied to the declination rotation between the workpiece and the brooch. By dispersing while moving, there is an effect that can be used safely while preventing defects such as cracking and cracking of the material and brooch.

According to the brooch of the present invention, the inner diameter spiral groove can be easily processed on the material while twisting in one direction when the material is mounted on the broaching tool, so that the processing of the inner diameter spiral groove is more convenient and the processing time is shortened, thereby reducing the processing time. There is an effect that can be produced.

1 is an explanatory view of a use state showing a broaching tool to which the present invention is applied.
Figure 2 is a perspective view of a broaching tool to which the present invention is applied.
Figure 3 is an exploded perspective view showing a broaching tool to which the present invention is applied.
4 is a cross-sectional view showing a broaching tool to which the present invention is applied.
Figure 5 is an explanatory view showing a processing state of the material by the broach when using the broaching tool to which the present invention is applied.
6 is an explanatory diagram showing a concentration state of processing pressure on brooches and materials when using the broaching tool to which the present invention is applied.
Figure 7 is a cross-sectional view showing a deviation control state of the broaching tool to which the present invention is applied.
8 is a perspective view showing a brooch to which the present invention is applied.
9 is an explanatory view showing the action of the processing pressure when using the brooch to which the present invention is applied.
10 is a perspective view showing a state in which the broaching tool is applied to the brooch to which the present invention is applied.
11 is a perspective view showing another embodiment of the brooch to which the present invention is applied.
Figure 12 is a side cross-sectional view showing a machining state using a brooch to which the present invention is applied.

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

The broaching tool of the present invention is composed of a body 100 for coupling and fixing the brooch 300 and a holder 200 for mounting and rotating the body as shown in FIGS. 1 to 7.

Here, the brooch 300 includes both a processing part 310 of one end for processing the material 1 and a mounting part 320 of the other end for mounting on the body 100.

The body 100 is formed in the form of a shaft rotatable about the center line, the fixing groove 110 is formed to mount and fix the brooch 300 for processing any material 1 in the center of the one end. At this time, the fixing groove 110 is formed to correspond to the mounting portion 320 of the brooch 300, for example, as shown in Figures 1 to 3 formed or mounted in a circular brooch 300 does not rotate It may be formed in the form of a square or hexagon, etc. to prevent.

The fixing groove 110 is formed so as not to move or shake in the state in which the end of the brooch 300 is fitted as an embodiment, the body (from the center line of the fixing groove 110 as shown in Figures 1 to 3) One or more first fixing holes 120 penetrating in an orthogonal direction toward the outer surface are formed, and a first fixing bolt 130 for tightly fixing the brooch 300 is formed in the first fixing holes 120. Is fastened.

The body 100 has a front bearing 140a and a rear bearing 140b fitted to the outer surface thereof, and the fixing nut 150 is fastened to prevent the front and rear bearings 140a and 140b from falling out at the rear end thereof. Rotate smoothly inside. Wherein the front and rear bearings (140a, 140b) is to be composed of one or more pin bearings or ball bearings, as shown in Figures 3 and 4, the engaging between the front and rear bearings (140a, 140b) formed in the rotating groove 210 The ring 210a is inserted to prevent it from being pulled out.

The holder 200 has a rotating groove 210 is formed to rotate by mounting the body 100 in the center of one end, the engaging projection 220 is formed to be coupled to any machine tool 2 in the other center On the other hand, the center line of the rotating groove 210 is formed to be inclined toward one side from the center line of the coupling protrusion 220. That is, the holder 200 is for coupling the body 100, on which the brooch 300 is mounted, to any machine tool 2, and the center line of the rotary groove 210 is moved from the center line of the coupling protrusion 220 to one side. As the slant is formed, the center line of the brooch 300 mounted on the body 100 is inclined to one side from the center line of the material 1. As such, when the brooch 300 contacts the material 1 in a state where the center lines of the brooch 300 and the material 1 do not coincide and are inclined to one side, as shown in FIG. 6, the pressure is concentrated at one point. (1) and the brooch 300 can be safely protected, the specific description will be described again below.

In addition, the coupling protrusion 220 is formed to be easily mounted on a variety of general machine tools such as lathes, milling in addition to the machine tool for broaching. That is, the mounting portion of a tool that is conventionally used for a machine tool such as a lathe or milling is formed in the form of a column, and the coupling portion of the machine tool is provided with a coupling portion for fixing such a mounting portion. Therefore, the coupling protrusion 220 of the present invention is formed in the form of a pillar protruding backward, so that the coupling protrusion 220 can be easily fixed and used as the mounting portion of the tool.

As shown in FIGS. 1 to 4, the holder 200 separates the front part 200a in which the rotary groove 210 is formed and the rear part 200b in which the coupling protrusion 220 is formed, and rotates. It comprises a connecting means 230 for controlling by connecting any intersection point that the two center lines of the groove 210 and the engaging projection 220 intersect. The deviation value when the brooch 300 processes the material 1 varies depending on the position of the intersection where the two center lines of the rotary groove 210 and the engaging protrusion 220 intersect, for example, the rotary groove 210. Even if the inclination of 1) is equal to 1 °, the deviation value D1 decreases when the intersection point P1 faces forward as shown in FIG. 4, and the deviation value D2 increases when the intersection point P2 faces backward as shown in FIG. 7. By adjusting the deviation value as described above it is possible to adjust the size to be processed in the material (1).

As shown in FIGS. 1 to 4, the connection means 230 is a holder 200 in which the front part 200a of the holder 200 in which the rotary groove 210 is formed and the coupling protrusion 220 are formed. Flanges 231a and 231b through which the fastening holes 232a and 232b pass, respectively, at the end portions of the rear portions 200b facing each other, respectively, and fastening holes 232a and 232b of the two opposite flanges 231a and 231b. It is formed to fasten to the fastening bolt 233 through), one of the two fastening holes (232a, 232b) of the fastening hole 232a is formed with a diameter larger than the diameter of the fastening bolt 233, from the centerline At least one second fixing hole 234 is formed in a perpendicular direction, and the second fixing bolt 235 is fastened to the second fixing hole 234 to fix the outer surface of the fastening bolt 233 to fix the position. It is configured to include.

That is, the connecting means 230 is connected to the front portion 200a and the rear portion 200b of the holder 200, for example, the fastening hole 232a of the front portion 200a of the fastening bolt 233 If the diameter is larger than the diameter, the front part 200a is moved to the left and right to adjust the position of the intersection, and then the fixing bolt 235 is tightened to fix the front part 200a not to move.

On the other hand, the holder 200 has an annular engaging ring 210a to be fitted between the front bearing 140a and the rear bearing 140b described above when mounting the body 100 inside the rotating groove 210. By being formed, the body 100 inside the rotating groove 210 is smoothly rotated without falling out.

The present invention is coupled to the broaching tool to process the material (1), as shown in Figure 1 to 11 at one end is formed with a processing unit 310 for processing the material, the other end The mounting portion 320 for mounting in the fixing groove 110 is to be formed, the end of the processing portion 310 is formed in the same cross-sectional shape as the shape for processing on the material (1). That is, since the brooch 300 of the present invention is mounted on the broaching tool described above to process the material while the material is rotated uniaxially with the material 1, the broach 300 is formed in the form of a conventional broach that is elongated step by step as described in the background art. It can be formed in the same cross-sectional shape as the shape for processing the material to peel off. Therefore, the processing unit 310 of the brooch 300 is formed in the form of a square, a hexagon, a gear, for example, a shape for processing on a material.

On the other hand, the processing unit 310 of the brooch 300 is formed twisted in the form of a screw turning in one direction while advancing along the central axis direction in order to form the inner diameter screw on the material (1). Therefore, according to the brooch 300 as shown in FIG. 9, when the broach moves forward while being moved in the twisted direction, the screw can be naturally formed. In this case, by adjusting the number of screws and the degree of twist formed in the processing unit 310 of the brooch 300, it is possible to easily process a variety of inner diameter spiral grooves.

In addition, the end of the processing portion 310 is formed with a recessed storage groove (310a). For example, the storage groove 310a is to collect the debris of the cut material when the brooch 300 is processing the groove while pushing the material (1). That is, if the cross section of the processing unit 310 is flat, because it is difficult to process the material to the desired depth by the debris generated when processing the material by forming such a storage groove (310a) to fill the debris therein The groove 1 of the desired depth is processed in the material 1.

According to the configuration of the broaching tool and broach of the present invention, the workpiece 1 is first fixed to the spindle 3 in the form of a groove formed at the end of the workpiece 1 by using a drill. Subsequently, the broach 300 is mounted on the body 100 in a state in which the coupling protrusion 220 of the broaching tool, to which the body 100 and the holder 200 are coupled, is mounted on an arbitrary machine tool 2. The broach 300 is moved by advancing the arbitrary machine tool 2 while rotating the material 1 using the spindle 3 while keeping the center of the spindle 3 and the engaging protrusion 220 coincident with each other. (1) should be processed. At this time, the brooch 300 is rotated at the moment in close contact with the material (1).

At this time, the processing unit 310 of the brooch 300 starts to be in close contact with the inclined position at an angle with respect to the cross section of the material 1 as shown in (A) of FIG. 5 and rotates together with the material 1. While processing (B) to (D). At this time, the size processed in the real material (1) compared to the processing unit 310 of the brooch 300, the difference occurs by the above-described deviation value D1, D2, so that the machining of the appropriate size by calculating the deviation value before processing Let this be done.

In addition, when the center line of the brooch 300 is inclined at an angle from the center line of the material 1, as shown in FIG. 4, the processing unit 310 of the brooch 300 may have any one of its cross sections first. The processing begins to be made by being in close contact with the end face of the raw material 1. Thus, the broach 300 is concentrated in a large pressure in the first contact with the material (1), the broach 300 because the material (1) and the brooch 300 is rotated to a different rotation value in a predetermined angle tilted state The position at which a large pressure acts on) also changes. That is, as shown in FIG. 6, when looking at the rotating material 1 as a reference, the processing unit 310 of the brooch 300 moves as the rotation is based on the center of the raw material 1, and a large pressure is increased. The parts of the impact are also dispersed throughout the movement.

According to the present invention having such a configuration by using the engaging projection 220 formed in the rear of the holder 200, as well as broaching dedicated machine tools, it can be easily mounted and used in various general machine tools such as lathes, milling, etc. The convenience of use is further improved.

In addition, by making it easy to replace the various types of brooches 300 through the body 100, the inconvenience of having to move the material in the process of processing is reduced.

In addition, the center line of the brooch 300 is inclined at a predetermined angle from the center line of the raw material 1 to concentrate the processing pressure applied to the raw material 1 and the brooch 300 during the machining process. 300) can be used safely while preventing the defects such as cracking or splitting.

In addition, internal threaded grooves can be easily machined on the material (1) while twisting in one direction when the material is mounted on the broaching tool, making it easier to process the internal diameter grooves and reducing the processing time for mass production. This becomes possible.

1: material 2: machine tool
3: spindle
100: body 110: coupling groove
120: first fixing hole 130: first fixing bolt
140a, 140b: Bearing 150: Lock nut
200: holder 210: rotating groove
210a: locking ring 220: engaging projection
230: connecting means 231a, 231b: flange
232a, 232b: fastening hole 233: fastening bolt
234: second fixing hole 235: second fixing bolt
300: brooch 310: machining
310a: storage groove 320: mounting portion

Claims

A body formed in the form of a shaft, and having a fixing groove formed to fix and mount a broach for processing any material in the center of one end portion; And
A rotating groove is formed to rotate by mounting the body at the center of one end portion, and a coupling protrusion is formed at the other center to be coupled to any machine tool, and a center line of the rotating groove is inclined toward one side from the center line of the coupling protrusion. Broaching tool characterized in that it comprises a.

The method according to claim 1, wherein the body,
And a first fixing bolt penetratingly formed in a direction perpendicular to the center line of the fixing groove, the first fixing bolt being fastened to the first fixing hole to tightly fix the broach.

The method according to claim 1, wherein the holder,
And a connecting means for separating and forming a front portion in which the rotating groove is formed and a rear portion in which the coupling protrusion is formed, and controlling an arbitrary intersection point at which the two center lines of the rotating groove and the coupling protrusion intersect. Broaching Tool.

The method according to claim 3, The connecting means,
A flange having a fastening hole is formed at an end facing the front part of the holder in which the rotating groove is formed and the rear part of the holder in which the engaging projection is formed, and fastened to the fastening bolt through the fastening holes of the two opposite flanges. But
The fastening hole on one side of the two flanges is formed with a diameter larger than the diameter of the fastening bolt, at least one second fixing hole is formed in a direction perpendicular to the center line, and the fastening bolt is fastened to the second fixing hole. Broaching tool comprising a second fixing bolt for tightening the outer surface of the fixing position.

The method according to claim 3, wherein the body,
The front bearing and the rear bearing are fitted from the rear, and the rear end is mounted to the rotary groove with the fixing nut fastened so that the front and rear bearings do not fall out.
Wherein the holder comprises:
Broaching tool characterized in that the annular engaging ring is formed so as to fit between the front bearing and the rear bearing when the body is mounted in the rotary groove.

A body formed in a shaft shape and having a fixing groove formed to mount a broach for processing a material at the center of one end portion; And a rotation groove is formed to rotate by mounting the body at the center of one end portion, and a coupling protrusion is formed at the other center to be coupled to any machine tool, and the center line of the rotation groove is inclined toward one side from the center line of the coupling protrusion. A broach for mounting a broaching tool, comprising: a holder;
At one end is formed a processing unit for processing the material, the other end is to be formed in the mounting portion for mounting in the fixing groove,
An end portion of the processing portion is formed in the same cross-sectional shape as the shape for processing on the raw material.

The brooch of claim 6, wherein the processing part is formed in a twisted shape in the form of a screw turning in one direction while advancing along a central axial direction to form an inner diameter screw in the material.

The brooch according to claim 6 or 7, wherein an end portion of the processing portion is formed with a recessed storage groove.