KR102492842B1 - Fix plate for milling holder - Google Patents

Abstract

The present invention provides a milling holder including a housing mounted on a turret, a collet disposed on the housing to rotatably mount a tool, and a collet nut disposed on a free end of the collet to fix the tool, wherein the collet It relates to a fixing piece for a milling holder mounted on a nut and limiting the rotation of the collet nut. Accordingly, the collet nut of the milling holder is easily fixed so that the operator can change the tool with one spanner, so that when replacing the tool of the milling holder It maximizes operator's convenience, reduces tool replacement time, and prevents tool damage.

Description

Fixing piece for milling holder {FIX PLATE FOR MILLING HOLDER}

The present invention relates to a fixing piece for a milling holder, and more particularly, to a fixing piece for a milling holder for easily replacing a tool detachably installed in a milling holder mountable on a turret.

In general, a machine tool refers to a machine used for the purpose of processing a metal/non-metal workpiece into a desired shape and dimension using an appropriate tool by various cutting processing methods or non-cutting processing methods.

Various types of machine tools, including turning centers, vertical/horizontal machining centers, door type machining centers, Swiss turns, electric discharge machines, horizontal type NC boring machines, CNC lathes, and multi-tasking machines, are widely used in various industrial fields to suit the purpose of the work. It is being used.

In general, various types of machine tools currently in use have a control panel to which numerical control (NC) or computerized numerical control (CNC) technology is applied. Such a control panel has various function switches or buttons and a monitor.

In addition, the machine tool has a table on which the material, which is a workpiece, is seated and transported for processing, a pallet for preparing the workpiece before processing, a spindle that rotates with a tool or workpiece combined, a tailstock for supporting the workpiece, etc. provide etc.

In general, in a machine tool, a table, a tool post, a main shaft, a tailstock, a resting ball, etc. are provided with a feed unit that feeds along a feed axis to perform various machining operations.

Also, in general, machine tools use a plurality of tools for various processing, and a tool magazine or a turret is used as a tool storage space for storing and storing a plurality of tools.

In general, a turning center includes a headstock and a tool post, and a milling holder can be mounted on a turret in order to process a workpiece with a tool desired by a user on the tool post.

Here, the tool mounted on the milling holder wears out with use, or tool replacement is required for desired processing.

Specifically, the disk of the turret has various dividing surfaces such as 8, 12, and 24 angles according to the dividing angle, and the milling holder is mounted on each of these dividing surfaces.

This milling holder includes a housing, a key inserted into the turret and receiving rotational force, one end connected to the key and receiving rotational force, a spindle unit connected to the other end of the spindle unit to which the tool is threaded, and a collet placed in the collet It may include a collet nut for firmly fixing the tool.

Due to the structural characteristics of such a milling holder, the conventional method for tool replacement has the following problems.

In order to exchange a tool in the milling holder, the collet nut must be fixed with a first spanner, and the tool must be removed or installed by turning the tool with a second spanner.

In this case, since the operator uses two spanners with both hands, the tool may not be installed accurately due to lack of hands to insert and fix the relatively heavy tool into the milling holder, or the tool may be detached, resulting in damage to the tool or a safety accident. There were possible problems.

Because of the above problems, there are times when some workers in the field change tools with a spanner at the tool stand-by position. In this case, shear stress is transmitted to the key, causing damage to the key or damage to the inside of the turret, which reduces processing costs and There was a problem of increasing maintenance cost and reducing processing precision.

In addition, in the past, when a worker uses two spanners, tool exchange frequently occurs at an incorrect machining position, resulting in damage to the workpiece and an increase in machining cost.

Korean Patent Publication No. 10-2012-0112126 Korean Patent Publication No. 10-2007-0015026

The present invention is to solve the above problems, and an object of the present invention is to easily fix the collet nut of the milling holder so that the operator can change the tool with one spanner, so that the operator's convenience when replacing the tool of the milling holder It relates to a fixture for a milling holder that can maximize tool change time, reduce tool change time, and prevent tool damage.

In order to achieve the above object, the present invention includes a housing mounted on a turret, a collet disposed on the housing and rotatably mounted with a tool, and a collet nut disposed at a free end of the collet to fix the tool. In the milling holder, a fixing piece for the milling holder mounted on the collet nut to limit rotation of the collet nut is provided.

In addition, in another preferred embodiment of the fixing piece for the milling holder according to the present invention, a receiving groove may be formed on one side of the fixing piece for the milling holder so that a part of the outer circumferential surface of the collet nut is accommodated.

In addition, in another preferred embodiment of the fixing piece for the milling holder according to the present invention, the fixing piece for the milling holder has at least one fixing protrusion formed on the housing of the milling holder, and the fixing piece for the milling holder is formed on the fixing protrusion. A fixing hole to be inserted may be formed.

In addition, in another preferred embodiment of the fixing piece for the milling holder according to the present invention, the fixing piece for the milling holder is inserted into at least one concave groove formed in the longitudinal direction of the tool on the outer circumferential surface of the collet nut. It may include at least one fixing part protruding toward the center of the collet nut from one side surface or the receiving groove.

In addition, in another preferred embodiment of the fixing piece for the milling holder according to the present invention, each fixing part or part of the fixing piece for the milling holder includes a ball arranged so that a part of the fixing part protrudes from the free end of the fixing part; and an elastic member accommodated in the fixing unit and providing tensile force to the ball.

In addition, in another preferred embodiment of the fixing piece for the milling holder according to the present invention, the concave grooves of the collet nut of the milling holder are spaced apart at equal intervals on the outer circumferential surface of the collet nut to form four pieces, At least two or more of the fixing parts may be arranged to correspond to the positions of the concave grooves.

In addition, in another preferred embodiment of the fixing piece for the milling holder according to the present invention, the fixing piece for the milling holder may be mounted on the milling holder so that the receiving groove and the center of the collet nut coincide.

In addition, in another preferred embodiment of the fixing piece for the milling holder according to the present invention, the radius of the receiving groove of the fixing piece for the milling holder is larger than the radius of the collet nut, and the fixing part extends from the free end to the center of the receiving groove. The distance of may be formed smaller than the radius of the collet nut.

In addition, in another preferred embodiment of the fixing piece for the milling holder according to the present invention, at least one fixing hole of the fixing piece for the milling holder may be formed on both sides of the center of the receiving groove.

In addition, in another preferred embodiment of the fixing piece for the milling holder according to the present invention, the fixing piece for the milling holder may further include a handle protruding outward from the other side of the fixing piece for the milling holder.

In the fixing piece for the milling holder according to the present invention, the fixing part of the fixing piece for the milling holder slides along the concave groove of the turret nut and is fixed to the turret nut, and at the same time, the fixing hole is seated in the fixing protrusion formed in the housing of the milling holder, thereby rotating the turret nut. Since can be easily limited, there is an effect that the operator can easily exchange the tool for the milling holder with a spanner.

In addition, the fixing piece for the milling holder according to the present invention allows the operator to exchange the tool with one spanner, so that one hand can be freed, so that the tool of the milling holder can be exchanged alone while holding the tool, so that two or more workers can work can be performed by one worker, reducing production cost and time, and increasing work efficiency.

Moreover, the fixing piece for the milling holder according to the present invention allows the operator to exchange tools with a single spanner, thereby freeing one hand, thereby preventing safety accidents that may occur when exchanging tools of the milling holder in advance, and improving operator convenience. There is an effect that can be promoted.

In addition, the fixing piece for the milling holder according to the present invention increases productivity by reducing non-processing time as one worker quickly replaces the tool of the milling holder, and increases machining precision by preventing tool breakage or damage. There are possible effects.

1 shows a conceptual diagram of a state in which a fixing piece for a milling holder according to an embodiment of the present invention is installed in a milling holder mounted on a turret.
FIG. 2 shows a detailed view of the milling holder portion in FIG. 1 with the tool removed.
3 shows a perspective view of a fixing piece for a milling holder according to a first embodiment of the present invention.
FIG. 4 shows a partial perspective plan view of FIG. 3 .
5 shows a perspective view of a fixing piece for a milling holder according to a second embodiment of the present invention.
6 shows a perspective view of a fixing piece for a milling holder according to a third embodiment of the present invention.
7 shows a perspective view of a fixing piece for a milling holder according to a fourth embodiment of the present invention.
8 shows a perspective view of a fixing piece for a milling holder according to a fifth embodiment of the present invention.

Hereinafter, it will be described in detail with reference to the drawings of the prefabricated pillow according to an embodiment of the present invention. The embodiments introduced below are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention may be embodied in other forms without being limited to the embodiments described below. And, in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numbers indicate like elements throughout the specification.

Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and the common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of explanation.

Terms used in this specification are for describing embodiments, and therefore are not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, "comprise" and/or "comprising" means that a stated component, step, operation, and/or element is the presence of one or more other components, steps, operations, and/or elements. or do not rule out additions.

1 shows a conceptual view of a state in which a fixing piece for a milling holder according to an embodiment of the present invention is installed in a milling holder mounted on a turret, and FIG. 2 shows a detailed view of the milling holder part in a state in which the tool is removed in FIG. 1 . 3 shows a perspective view of a fixing piece for a milling holder according to a first embodiment of the present invention, and FIG. 4 shows a partial perspective plan view of FIG. 3. FIG. 5 is a fixing piece for a milling holder according to a second embodiment of the present invention. represents a perspective view. 6 shows a perspective view of a fixing piece for a milling holder according to a third embodiment of the present invention. 7 shows a perspective view of a fixing piece for a milling holder according to a fourth embodiment of the present invention. 8 shows a perspective view of a fixing piece for a milling holder according to a fifth embodiment of the present invention.

1 and 2, the milling holder 30 to which the fixing piece 100 for the milling holder according to the embodiment of the present invention can be mounted is mounted on the disk of the turret 10, and the tool 20 It can be clamped and rotated.

Specifically, the milling holder 30 includes a housing 31 mounted on the turret 10, a collet 32 disposed on the housing 31 to which the tool 20 is rotatably mounted, and the collet A collet nut 33 disposed at a free end of 32 to fix the tool 20 may be included.

In addition, at least one fixing protrusion 34 may protrude from a surface of the housing 31 on which the collet 32 is disposed.

In addition, at least one concave groove 33a formed in the longitudinal direction of the tool 20 may be formed on an outer circumferential surface of the collet nut 33 .

For example, as shown, four concave grooves 33a may be formed at 90° intervals on the outer circumferential surface of the collet nut 33, but are not limited thereto, and may be formed on the outer circumferential surface of the collet nut 33. Two may be formed at intervals of 180°, or three may be formed at intervals of 120° on the outer circumferential surface of the collet nut 33.

1 to 8, the fixing piece 100 for the milling holder according to the embodiment of the present invention is mounted on the collet nut 33 of the milling holder 30 to limit the rotation of the collet nut 33. can

Specifically, a receiving groove 110 may be formed on one side of the fixing piece 100 for the milling holder so that a part of the outer circumferential surface of the collet nut 33 is accommodated.

The fixing piece 100 for the milling holder is disposed outside the collet nut 33 so that the imaginary center c of the receiving groove 110 coincides with the rotation center of the collet nut 33, and the receiving groove The radius of 110 is formed equal to or larger than the radius of the collet nut 33 to accommodate a part of the outer circumferential surface of the collet nut 33.

Therefore, primarily, the fixing piece for the milling holder is stably mounted on the milling holder to promote work convenience.

In addition, in order to limit the rotation of the collet nut 33, the fixing piece 100 for the milling holder is attached to one side of the fixing piece 100 for the milling holder or the collet nut 33 in the receiving groove 110. It may include at least one fixing part 120 protruding in the center direction of the.

Here, the distance from the free end of the fixing part 120 to the center of the receiving groove 110 may be smaller than the radius of the collet nut 33 .

Alternatively, the distance from the free end of the fixing part 120 to the center of the receiving groove 110 may be greater than or equal to the distance from the center of the collet nut 33 to the outer surface of the concave groove 33a. can

Accordingly, the fixing part 120 may be fitted in the body direction of the milling holder 30 along the concave groove 33a of the collet nut 33 .

For example, four concave grooves 33a are spaced at equal intervals on the outer circumferential surface of the collet nut 33, and at least two of the fixing parts 120 are located at the positions of the concave grooves 33a. It can be arranged to correspond to.

In this case, as shown, one fixing part 120 is disposed in the accommodating groove 110 and two are disposed at a portion where one side surface of the accommodating groove 110 and the fixing piece 100 for the milling holder meet. can

As such, as the fixing piece 100 for the milling holder is secondarily coupled and installed while being caught in the concave groove 33a of the collet nut 33 by the fixing part 120, the fixing piece 100 for the milling holder is can be prevented from escaping.

Meanwhile, the fixing piece 100 for the milling holder clamped to the collet nut 33 should limit the rotation of the collet nut 33, so the fixing piece 100 for the milling holder has the fixing protrusion 34 A fixing hole 150 to be inserted may be formed.

Therefore, since the fixing piece 100 for the milling holder is fixed to the housing 31 of the non-rotating tool 20 holder and the collet nut 33 is clamped at the same time, the collet nut 33 cannot rotate. become a state As a result, the fixing piece for the milling holder is three-dimensionally firmly mounted on the milling holder, so that the separation of the fixing piece for the milling holder from the milling holder can be prevented and the rotation of the collet nut can be prevented at the same time.

In addition, the fixing piece 100 for the milling holder may further include a handle 160 protruding outward on the other side surface, and the operator holds the handle 160 and moves the fixing piece 100 for the milling holder to the collet. It can be easily inserted into the nut (33).

In addition, in order to firmly clamp the collet nut 33 without being separated from the collet nut 33, each fixing part 120 or part of the fixing piece 100 for the milling holder according to the embodiment of the present invention The fixing part 120 includes a ball 130 disposed so that a part protrudes from the free end of each fixing part 120, and an elastic member accommodated in the fixing part 120 and providing a tensile force to the ball 130. (140) may be further included. This elastic member may preferably be made of a spring.

That is, the ball 130 and the spring 140 may be implemented as a ball plunger, and due to the tensile force of the spring 140, the ball 130 presses the concave groove 33a to fit the embodiment of the present invention. The fixing piece according to the above can be firmly mounted to the collet nut 33.

As such, each fixing part or part of the fixing part firmly couples the fixing piece for the milling holder in the fourth place when the fixing piece for the milling holder is attached to the milling holder through the ball and the elastic member, and at the same time the fixing piece for the milling holder is separated It maximizes the operator's convenience by reducing the tool replacement time of the milling holder, thereby maximizing the processing efficiency by reducing the non-processing time, and at the same time freeing the operator's one hand to prevent safety accidents that may occur due to tool separation. can be prevented in

3 to 8 , at least one fixing hole 150 may be formed on both sides with the receiving groove 110 interposed therebetween.

Specifically, referring to FIGS. 3 and 4 , the fixing holes 150 may be formed in a figure 8 shape on both sides of the fixing piece 100 for the milling holder, respectively. This shape can fix the collet nut 33 even when the collet nut 33 is not well aligned, that is, when the concave groove 33a and each side of the housing 31 do not face each other. .

5 and 7, the fixing hole 150 may be formed in a circular shape on both sides of the fixing piece 100 for the milling holder, respectively. This shape can fix the collet nut 33 when the collet nut 33 is well aligned, that is, when the concave groove 33a and each side of the housing 31 face each other. .

Accordingly, it is possible to maximize worker convenience when exchanging tools of the milling holder, improve productivity through a reduction in tool exchanging time, and increase machining precision by preventing tool damage or breakage.

Referring to FIGS. 6 and 8 , two fixing holes 150 may be formed on both sides of the fixing piece 100 for the milling holder, respectively. This shape can fix the collet nut 33 even when the collet nut 33 is not well aligned, that is, when the concave groove 33a and each side of the housing 31 do not face each other. .

The method of using the fixing piece 100 for the milling holder according to the embodiment of the present invention is as follows.

Once, when the tool 20 needs to be replaced, the operator inserts the fixing piece 100 for the milling holder according to the embodiment of the present invention into the collet nut 33.

Specifically, the operator holds the handle 160 and inserts the fixing piece 100 for the milling holder from the free end of the tool 20 toward the housing 31 of the milling holder 30.

At this time, the fixing part 120 slides along the concave groove 33a of the collet nut 33, and is clamped to the collet nut 33 due to the pressing force of the ball 130.

Then, when the fixing hole 150 is inserted into the fixing protrusion 34 protruding from the housing 31 of the milling holder 30, the fixing piece 100 for the milling holder rotates the collet nut 33. Clamp the collet nut 33 so that it can be restricted.

Therefore, the operator can safely replace the tool 20 by holding the tool 20 with one hand and using the spanner with the other hand.

In the detailed description of the present invention described above, it has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those having ordinary knowledge in the art can claim the scope of the present invention described in the following claims. It will be understood that various modifications and changes can be made to the present invention without departing from the scope of the spirit and technology. Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: turret 20: tool
30: milling holder 31: housing
32: collet 33: collet nut
33a: concave groove 34: fixed protrusion
100: fixing piece for milling holder 110: receiving groove
120: fixing part 130: ball
140: spring 150: fixed hole
160: handle

Claims (10)

A milling holder including a housing mounted on the turret, a collet disposed on the housing to which a tool is rotatably mounted, and a collet nut disposed on a free end of the collet to fix the tool, and a milling holder for fixing the milling holder. In the fixing piece for the holder,
The fixing piece for the milling holder is detachably mounted to the collet nut to limit rotation of the collet nut,
The fixing piece for the milling holder has a receiving groove formed on one side thereof so that a part of the outer circumferential surface of the collet nut is accommodated,
At least one fixing protrusion is formed on the housing of the milling holder,
A fixing hole inserted into the fixing protrusion is formed on the fixing piece for the milling holder,
The fixing piece for the milling holder is detachably mounted to the milling holder so that the center of the receiving groove and the collet nut coincide when a tool mounted on the collet is exchanged, and is detached from the milling holder after tool exchange. A fixture for a milling holder.
delete delete According to claim 1,
The fixing piece for the milling holder,
At least one fixing part protruding in the center direction of the collet nut from one side of the fixing piece for the milling holder or the receiving groove to be inserted into at least one concave groove formed on the outer circumferential surface of the collet nut in the longitudinal direction of the tool; Fixing piece for the milling holder, characterized in that it comprises.
According to claim 4,
Each fixing part or part fixing part of the fixing piece for the milling holder,
a ball disposed so that a part protrudes from the free end of the fixing part; and
A fixing piece for a milling holder comprising an elastic member accommodated in the fixing part and providing a tensile force to the ball.
According to claim 4 or 5,
Four concave grooves are formed on the outer circumferential surface of the collet nut at equal intervals,
The fixing piece for the milling holder, characterized in that at least two or more of the fixing parts are arranged to correspond to the position of the concave groove. delete According to claim 5,
The radius of the receiving groove is formed larger than the radius of the collet nut,
The fixing piece for the milling holder, characterized in that the distance from the free end to the center of the receiving groove is smaller than the radius of the collet nut.
According to claim 1,
The fixing hole is a fixing piece for a milling holder, characterized in that at least one is formed on both sides of the center of the receiving groove.
According to claim 4,
Fixing piece for the milling holder, characterized in that it further comprises; a handle protruding outward from the other side of the fixing piece for the milling holder.

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