KR102671885B1 - Cutting tool holder - Google Patents

Abstract

The present invention is a cutting tool holder, and more specifically, it is supported on a rotating tool rest through a bar-shaped handle, and the cutting tool is inserted through the insertion hole, clearance gap, and separation hole of the fixing part through the tightening hole and fixing bolt. It is an invention that can fix cutting tools. It is supported on the rotating tool rest of a CNC lathe, allowing work to be done without problems with interference with the tailstock and tool rest. Cutting tools can be replaced simply and easily while having a strong fixing force. It concerns cutting tool holders.

Description

Cutting tool holder

The present invention is a cutting tool holder, which is supported on the rotating tool rest of a CNC lathe through the handle, allowing work to be performed without problems with interference with the tailstock and tool rest, and allows for simple and easy cutting tool replacement through the fixing portion, while providing a strong It relates to a cutting tool holder that can have fixing force.

Korean Patent Publication No. 10-2016-0000216, ‘Internal Diameter Holder for Turret Tool Holder’, is disclosed as a technology for a holder, which is a device that is supported on a CNC lathe machining rotating tool stand and holds various types of cutting tools.

Cutting work using such an internal diameter holder has frequent interference problems with the tailstock and tool rest of the CNC lathe, and the disadvantage is that unnecessary time is consumed when frequent cutting tool replacement is performed due to complex cutting tool replacement work using multiple bolts. There is.

The present invention is intended to solve the above problems. It is supported on the rotating tool rest of a CNC lathe, allowing work to be performed without interference problems with the tailstock and tool rest, and having a strong fixing force while allowing for simple and easy cutting tool replacement. You can.

The cutting tool holder according to the first embodiment of the present invention for solving the above problem has a bar shape, one end of which is supported on a rotating tool rest, and is located at one end of the handle, and an insertion hole penetrates the front and back. It may include a fixing part that is formed and fixes the cutting tool by penetrating it through the insertion hole.

And the fixing part includes a gap formed inward from the side and passing through the insertion hole; It further includes a tightening hole formed to penetrate the upper and lower surfaces, penetrating part of the separation gap and having a thread formed on the through surface, and a fixing bolt formed to correspond to the tightening hole, by tightening or loosening the fixing bolt. It may be characterized in that the cutting tool can be replaced.

In addition, the spacing gap may include a spacing hole formed at an inner end of the spacing gap.

In addition, in the cutting tool holder according to the second embodiment of the present invention, the shank portion and the fixing portion are separated to form a cross-section, and the shank portion includes an axial slot, which is a cylindrically empty space from the center of the cross-section toward the inside. And, the fixing part further includes a rotation axis that protrudes from the center of the cross section and is formed to correspond to the axis slot so that it can be inserted into the axis slot, and the axis slot has a plurality of axis fixing slots that are empty spaces along the outer peripheral surface. The rotating shaft may be characterized in that it has a plurality of shaft protrusions formed to correspond to the shaft fixing slot.

In addition, in the cutting tool holder according to the third embodiment of the present invention, the rotation axis further includes a stick groove, which is an empty space of circular cross-section formed in the longitudinal direction at the center, and the shaft protrusion is located inside the rotation axis. It is inserted and partially retracted into the stick groove, and the fixing part includes a moving groove formed with a length inward from a surface connected to the rotation axis; a moving stick provided inside the moving groove and moving inside the stick groove to push the shaft protrusion from the inside of the stick groove; It further includes an operation bar, one end of which is fixed to the movement stick and the other end of which protrudes in the upper surface direction of the fixing part, and an operation bar slot that is formed through the movement groove in the upper surface direction and allows the operation bar to be moved by an external force. It can be characterized as:

The shaft slot may further include an empty locking groove with a circular cross-section having a larger diameter at one end of the inner side, and the rotation axis may further include a locking shaft formed to correspond to the locking groove. .

The cutting tool holder according to an embodiment of the present invention opens the insertion hole through the clearance gap, clearance hole, tightening hole, and fixing bolt to insert the cutting tool and secure the fixing bolt in the center drilling and internal diameter process through frequent replacement of the cutting tool. You can simply and easily install and replace cutting tools by tightening or loosening them.

In addition, by simply and easily rotating and fixing the fixture, the cutting tool fixed to the fixture can be used more flexibly in internal cutting and drilling work beyond the cutting range of its shape.

In addition, the shaft slot further includes an empty locking groove with a circular cross-section having a larger diameter at one end of the inner side, and the rotation axis may further include a locking shaft formed to correspond to the locking groove, and the locking groove and the locking groove Stability can be increased by preventing the fixture from falling in a direction away from the shank without interfering with the rotation of the fixture through the rotation axis.

Figure 1 is an exemplary diagram showing a cutting tool holder according to a first embodiment of the present invention supported on a rotating tool rest and fixing a cutting tool.
Figure 2 is a perspective view of a cutting tool holder according to the first embodiment of the present invention.
Figure 3 is a bottom perspective view of Figure 2.
Figures 4 (a) and (b) are examples showing narrowing the separation gap by tightening the fixing bolt on the cutting tool holder.
Figures 5 (a) and (b) are exploded perspective views showing that the cutting tool holder according to the second embodiment of the present invention is separated into a shank portion and a fixing portion so that the angle can be adjusted.
Figures 6 (a) and (b) are diagrams illustrating the operation of the latent axial protrusion of the cutting tool holder according to the third embodiment of the present invention as seen from the cross section of the shank portion and the fixing portion.
Figure 7 is an enlarged view of a portion of Figure 6.
Figures 8 (a) and (b) are diagrams illustrating the operation of the latent shaft of the cutting tool holder according to the third embodiment of the present invention as seen from the cross section of the handle.
Figures 9 (a) and (b) are operational examples showing the operation of the fixing unit according to the third embodiment of the present invention.
Figure 10 is a perspective view showing the angle of the cutting tool holder adjusted according to the third embodiment of the present invention.

Hereinafter, the description of the present invention with reference to the drawings is not limited to specific embodiments, and various changes may be made and various embodiments may be possible. In addition, the content described below should be understood to include all conversions and substitutions included in the spirit and technical scope of the present invention.

In the following description, the terms first, second, etc. are terms used to describe various components, and their meaning is not limited, and is used only for the purpose of distinguishing one component from other components.

Like reference numerals used throughout this specification refer to like elements.

As used herein, singular expressions include plural expressions, unless the context clearly dictates otherwise. In addition, terms such as 'include', 'equipped', or 'have' used below are intended to designate the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification. It should be construed and understood as not precluding the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

Hereinafter, a cutting tool holder according to a first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

In addition, the directions expressed in the specification to indicate the components of the cutting tool holder are the front side where the insertion hole of the cutting tool holder can be seen in Figure 2, and based on the front side, the back side is the back side, the top side is the top side, and the bottom side is the side where the insertion hole of the cutting tool holder is visible. This will be explained using the side where the separation gap is visible on the right side.

Figure 1 is an exemplary diagram showing a cutting tool holder according to a first embodiment of the present invention supported on a rotating tool rest and fixing a cutting tool, and Figure 2 is a perspective view of the cutting tool holder according to the first embodiment of the present invention. , Figure 3 is a bottom perspective view of Figure 2, and Figures 4 (a) and (b) are examples showing narrowing the separation gap by tightening the fixing bolt on the cutting tool holder.

Referring to FIG. 1, the cutting tool holder 1 according to the first embodiment has a bar shape and is located at one end of the handle 10 and one end of the handle 10 supported on the rotating tool rest T. , an insertion hole 21 is formed penetrating the front and rear surfaces, and may include a fixing part 20 that penetrates and secures the cutting tool B through the insertion hole 21.

As can be seen in FIG. 1, the shank portion 10 can be supported in the fixing slot of the rotating tool rest (T), and can be barred from the rotating tool rest (T) to reduce interference with the tailstock and tool rest of the CNC lathe. It extends in a long shape.

The length of the handle 10 can be adjusted according to the size of the tailstock and tool rest of the CNC lathe and the workpiece, and is not limited to the length shown in the drawing.

In addition, the handle 10 is formed to correspond to the fixing device formed on the rotary tool rest (T) in order to receive closer support from the rotary tool rest (T), thereby forming a recessed groove toward the inside of the handle 10. It may be possible.

Referring to FIGS. 2 to 4, the fixing part 20 is formed from the side to the inside and passes through the insertion hole 21, and has a gap 22 formed through the upper and lower surfaces. It may further include a tightening hole 23 that penetrates a part of (22) and has a thread formed on the penetrating surface, and a fixing bolt 24 formed to correspond to the tightening hole 23.

Additionally, the spacing gap 22 may include a spacing hole 220 formed at an inner end of the spacing gap 22.

The spacing gap 22 serves to adjust the size of the insertion hole 21 into which the cutting tool is inserted through the opening of the spacing gap 22, and this spacing gap 22 is formed at the inner end. It can be opened more easily through the separation hole 220.

A fixing bolt 24 is inserted into the tightening hole 23, and the fixing bolt 24 can be inserted through a thread formed on the inner surface, and the gap 22 is widened as shown in (a) of Figure 4. In (b), it can be seen that the gap 22 is narrowed by tightening the fixing bolt 24 inside the tightening hole 23.

Therefore, by opening the insertion hole 21 through the above-described spacing gap 22, spacing hole 220, tightening hole 23, and fixing bolt 24, inserting the cutting tool and tightening or loosening the fixing bolt 24. Cutting tools can be installed and replaced simply and easily.

Hereinafter, a cutting tool holder according to a second embodiment of the present invention will be described in detail with reference to FIG. 5.

Figures 5 (a) and (b) are exploded perspective views showing that the cutting tool holder according to the second embodiment of the present invention is separated into a handle part and a fixing part 20, so that the angle can be adjusted.

Referring to FIG. 5, in the form of the first embodiment, the handle portion 10 and the fixing portion 20 are separated to form a cross section, and the handle portion 10 is cylindrical from the center of the cross section toward the inside. It includes an axis slot 11, which is an empty space, and the fixing part 20 protrudes from the center of the cross section so that it can be inserted into the axis slot 11, and the rotation axis is formed to correspond to the axis slot 11. 25) may further be included.

And the shaft slot 11 is formed with a plurality of shaft fixing slots 111 that are empty spaces along the outer peripheral surface, and the rotation shaft 25 has a plurality of shaft protrusions formed to correspond to the shaft fixing slots 111. (251) can be formed.

Each shaft fixing slot 111 may be tapered in a direction away from the shaft slot 11, and the shaft protrusion 251 may also be formed correspondingly, so it is not limited to the shape shown in the drawings.

In addition, the rotation axis 25 of the fixing part 20 is formed at an end toward the inside of the shaft slot 11 with a magnetic material so that it can be easily removed while forming a bonding force between the handle part 10 and the fixing part 20. You may.

The cutting tool holder 1 according to the second embodiment includes the shaft slot 11 of the handle 10, the shaft fixing slot 111, the rotation axis 25 of the fixing part 20, and the shaft projection 251. Through this function, the handle part 10 and the fixing part 20 can be separated and the angle of the fixing part 20 with respect to the handle part 10 can be finely adjusted to fit and fix it.

Through this, the cutting tool fixed to the fixture 20 can be used more flexibly in internal cutting and drilling operations beyond the cutting range of its shape.

Hereinafter, a cutting tool holder according to a third embodiment of the present invention will be described in detail with reference to FIGS. 6 to 10.

Figures 6 (a) and (b) are diagrams illustrating the operation of the latent shaft protrusion 251 of the cutting tool holder according to the third embodiment of the present invention as seen from the cross section of the handle and the fixing part, and Figure 7 is an enlarged view of a portion of Figure 6, and Figures 8 (a) and (b) show the operation of the latent shaft protrusion 251 of the cutting tool holder according to the third embodiment of the present invention as seen from the cross section of the handle. It is an operation example diagram, and Figures 9 (a) and (b) are an operation example diagram showing the operation of the fixing part according to the third embodiment of the present invention, and Figure 10 is a cutting tool according to the third embodiment of the present invention. This is a perspective view showing the angle of the holder adjusted.

Referring to FIGS. 6 to 9, in the form of the second embodiment, the rotation shaft 25 further includes a stick groove 252, which is an empty space of circular cross-section formed in the longitudinal direction at the center, and the shaft protrusion ( 251) may be inserted into the rotation shaft 25 and a portion may be inserted into the stick groove 252.

As shown in Figure 6(a), Figure 7(a), Figure 8(a), and Figure 9(a), the shaft protrusion 251 of the fixing part 20 is completely inserted into the rotating shaft 25. When this happens, the rotating shaft 25 can freely rotate inside the shaft slot 11 and the fixing part 20 connected thereto can also rotate together.

And the fixing part 20 is provided with a moving groove 26 formed to have a length inward from the surface connected to the rotation shaft 25 and is provided inside the moving groove 26 and moves into the stick groove 252. Thus, it may further include a moving stick 27 that pushes the shaft projection 251 from the inside of the stick groove 252.

When the movement stick 27 is completely moved to the stick groove 252 inside the rotation axis 25, as shown in Figure 6 (b), Figure 7 (b), Figure 8 (b), and Figure 9 (b) , a part of the shaft protrusion 251 pushed by the moving stick 27 that has entered the stick groove 252 is drawn into the shaft fixing slot 111, so that the rotation shaft 25 is fixed, and thus the fixing portion 20 It is fixed so that it cannot rotate with respect to the handle 10.

In addition, as shown in FIGS. 6 and 7, the moving stick 27 has a tapered end that enters the stick groove 252, and the moving stick 27 moves at the part where the axis protrusion 251 enters the inside of the stick groove 252. ) is formed to be inclined to correspond to the end of the movable stick 27, so that when the movable stick 27 moves inside the stick groove 252, the shaft protrusion 251 is directed toward the shaft fixing slot 111. You can push it out.

In addition, the end of the shaft projection 251 in the direction of the shaft fixing slot 111 and one inner surface of the shaft fixing slot 111 are formed of a magnetic material of the same polarity, so that the movement stick 27 is formed as shown in (a) of FIG. 8. When it does not move inside the stick groove 252, the shaft fixing slot 111 can be inserted into the rotating shaft 25 by pushing it in the direction of the rotating shaft 25 regardless of the direction of gravity.

And one end is fixed to the moving stick 27 and the other end is formed to protrude in the upper surface direction of the fixing part 20 and is formed to be pierced from the moving groove 26 in the upper surface direction to protect against external force. It may further include an operation bar slot 29 that can move the operation bar 28.

Although not shown in the drawing, a movable control device that can block the movement of the operation bar 28 may be additionally configured on the upper surface of the fixing part 20 so that the operation bar 28 can be moved and fixed. Additional configuration can be easily configured using known technologies, so it will be omitted.

delete

Referring to FIG. 10, the cutting tool holder 1 according to the third embodiment is fixed by simply and easily rotating the fixing part 20 through the above-described configurations, thereby providing a more flexible fixing part (20) in internal cutting and drilling operations. It shows that the cutting tool (B) fixed to 20) can be used for a variety of purposes beyond the cutting range of its shape.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential features of the present invention. You will be able to understand it. Therefore, the embodiments described above are illustrative in all respects and are not restrictive.

1: Cutting tool holder
10: shank
11: Axis slot
111: Axis fixing slot
20: Fixing part
21: Insertion hole
22: Separation gap
220: Separation hole
23: Tightening hole
24: Fixing bolt
25: rotation axis
251: Axial process
252: Stick Home
26: mobile home
27: Move stick
28: Control bar
29: Control bar slot
T: Rotating tool stand
B: cutting tool

Claims (6)

A bar-shaped handle with one end supported on a rotating tool rest and
It is located at one end of the handle, and an insertion hole is formed penetrating through the front and rear sides, and includes a fixing part for fixing the cutting tool through the insertion hole,
The fixing part,
a gap formed inward from the side and passing through the insertion hole;
A tightening hole formed through the upper and lower surfaces, penetrating part of the gap and having a thread formed on the through surface, and
Further comprising a fixing bolt formed to correspond to the tightening hole,
The cutting tool can be replaced by tightening or loosening the fixing bolt,
The handle portion and the fixing portion are separated to form a cross section,
The shank part,
It includes an axial slot, which is a cylindrically empty space from the center of the cross section toward the inside,
The fixing part,
It further includes a rotation axis that protrudes from the center of the cross-section and is formed to correspond to the axis slot so that it can be inserted into the axis slot,
The shaft slot is formed with a plurality of shaft fixing slots that are empty spaces along the outer peripheral surface,
The rotation axis is,
A cutting tool holder, characterized in that a plurality of shaft protrusions are formed corresponding to the shaft fixing slot.
delete According to paragraph 1,
The separation gap is,
A cutting tool holder comprising a separation hole formed at an inner end of the separation gap.
delete According to paragraph 1,
The rotation axis is,
It further includes a stick groove, which is an empty space of circular cross-section formed in the longitudinal direction at the center,
The shaft is,
It is inserted into the rotating shaft and a portion is drawn into the stick groove,
The fixing part,
a moving groove formed to have a length inward from a surface connected to the rotation axis;
a moving stick provided inside the moving groove and moving inside the stick groove to push the shaft protrusion from the inside of the stick groove;
An operation bar, one end of which is fixed to the moving stick and the other end of which protrudes toward the upper surface of the fixing part, and
A cutting tool holder further comprising an operating bar slot that is formed from the moving groove in the upper surface direction and allows the operating bar to be moved by an external force. delete