KR100977746B1 - Tool magazine for milling machine - Google Patents

Abstract

PURPOSE: A tool holding device for automatically changing a tool of a cutting machine is provided to easily replace a tool holder by enabling a worker to easily separate the tool holder from a holder bracket. CONSTITUTION: A tool holding device(100) for automatically changing a tool of a cutting machine comprises a holder bracket(110) and a tool holder(120). The holder bracket is coupled to one side of a cutting machine. The tool holder accepts one or more tools and is detachably coupled to the holder bracket through magnetic members(125). When power is applied to the tool holder, the tool holder is separated from the holder bracket.

Description

Tool holder for automatic tool change of cutting machine {Tool Magazine for Milling Machine}

The present invention relates to a tool holder, and more particularly, to a tool holder for automatic tool change in a cutting machine.

In general, a CNC-based cutting machine uses a tool (drill or end mill, etc.) to cut a work-piece according to a work order of a pre-programmed program. In this case, the cutting machine may change the type and size of the suitable tool according to the work order, and performs the operation of automatically changing the tool if necessary according to the work order. For automatic tool change of such a cutting machine, the cutting machine is provided with a tool holder for accommodating a plurality of tools having different types and sizes.

However, when the cutting machine clamps the tool stored in the tool holder even though the tool is clamped due to a malfunction during the automatic tool change operation, it may cause a safety accident and a breakdown or damage of parts. There is a need for development of a tool holder that can be prevented.

In addition, the tool housed in the tool holder is preferably stored at the height required for the tool clamping operation of the cutting machine. For this purpose, the storage height of the tool housed in the tool holder to accommodate various types and sizes of tools The development of adjustable tool holders is required.

An object of the present invention is to prevent safety accidents and parts failure, breakage, etc., which may occur during the operation of clamping a tool stored in a tool holder while the cutting machine has already clamped the tool due to a malfunction. It is to provide a tool holder for automatic tool change of the cutting machine that can be easily replaced by selecting a suitable tool holder according to the cutting conditions given to the cutting machine.

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The object is, in accordance with the present invention, a tool holder for automatic tool exchange of the cutting machine, mounting brackets coupled to one side of the cutting machine; And a tool holder which receives at least one tool and is detachably coupled to the holder bracket through a magnetic member to be separated from the holder bracket when a force greater than or equal to a predetermined value is applied thereto. Achieved by an exchange tool holder.

The magnetic member may include at least one magnetic ball coupled to the tool holder or the mounting bracket.

The magnetic ball may be fixed to protrude at least one portion of the tool holder, and the mounting bracket may be formed with a ball coupling groove for accommodating the protruding portion of the magnetic ball at a position corresponding to the magnetic ball.

The tool holder may be separated from the holder bracket and fall downward when the cutting machine clamps a tool stored in the tool holder while the tool is clamped due to a malfunction.

The tool holder may further include a tool height adjusting member coupled to the tool holder so as to be movable upward and downward to support a tool stored in the tool holder, in order to adjust a storage height of the tool stored in the tool holder. have.

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The tool holder may have at least one tool storage hole through which the at least one tool is inserted from the upper side, and the tool height adjusting member may be inserted into the tool storage hole at the lower side of the tool holder.

The tool height adjusting member may include: a hollow body screwed to the tool holder and into which a lower end of a tool received in the tool holder is inserted; And a taper part formed on an inner side surface of the hollow body to support and support the tool housed in the tool holder.

The tool holder may further include a tool presence sensor for checking whether there is a tool clamped to the cutting machine before the cutting machine clamps the tool accommodated in the tool holder.

The tool presence confirmation sensor is coupled to the mounting bracket with at least a portion protruding toward the tool holder, and the tool holder has a first sensor seating groove for accommodating the protruding portion of the tool presence confirmation sensor. Can be formed recessed to a depth of.

The tool holder may further include a tool height measuring sensor for measuring the clamping height of the tool clamped to the cutting machine after the cutting machine clamps the tool received in the tool holder.

The tool holder may further include a compressed air injection pipe for injecting compressed air toward the tool height measuring sensor so that foreign matter does not accumulate in the tool height measuring sensor.

The tool height measuring sensor is coupled to the mounting bracket with at least a portion protruding toward the tool holder, and the tool holder has a second sensor seating groove for accommodating the protruding portion of the tool height measuring sensor. Can be formed recessed to a depth of.

The tool holder further includes a protective cover rotatably coupled to the mounting bracket to cover the mounting bracket and the tool holder, wherein the protective cover includes the mounting bracket and the tool holder during cutting of the cutting machine. Covering, the holder bracket and the tool holder can be opened during the automatic tool exchange operation of the cutting machine.

According to the present invention, the tool holder is detachably coupled to the mounting bracket through the magnetic member and is separated from the mounting bracket when a force greater than or equal to a predetermined value is applied, so that the cutting machine is accommodated in the tool holder while the cutting machine is already clamped due to a malfunction. It is possible to prevent safety accidents and component failures and breakage that may occur during the operation of clamping the tool. In addition, the operator can easily and easily replace the tool holder in accordance with the cutting conditions given in the cutting machine because the operation is simple and easy to couple the tool holder to the mounting bracket or separate from the mounting bracket.

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1 is a perspective view of a tool holder for automatic tool change of a cutting machine according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the tool holder in the tool holder of FIG. 1.
3 is a rear view of the tool holder in the tool holder of FIG.
4 is a side view of the tool holder of FIG. 3.
5 is a front view of the tool holder of FIG. 3.
6 is a cross-sectional view of the tool holder taken along line VI-VI of FIG. 5.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in order to avoid unnecessary obscuration of the present invention.

1 is a perspective view of a tool holder for automatic tool change of a cutting machine according to an embodiment of the present invention, Figure 2 is a perspective view of the tool holder in the tool holder of Figure 1, Figure 3 is a perspective view of the tool holder of Figure 1 FIG. 4 is a side view of the tool holder of FIG. 3, FIG. 5 is a front view of the tool holder of FIG. 3, and FIG. 6 is a cross-sectional view of the tool holder along line VI-VI of FIG. 5.

1 to 4, the tool holder for automatic tool exchange (100, hereinafter referred to as 'tool holder') of the cutting machine according to the present embodiment is a bracket bracket 110 coupled to one side of the cutting machine (1). ), A tool holder 120 in which at least one tool T is received and detachably coupled to the mounting bracket 110 through the magnetic member 125, and a tool T stored in the tool holder 120. It includes a tool height adjusting member 130 is coupled to the tool holder 120 to support the tool (T) accommodated in the tool holder 120 to adjust the storage height of the).

The cradle bracket 110 is a means for supporting the tool holder 120 by connecting the tool holder 120 in which the at least one tool T is received to the cutting machine 1, and is bent as shown in FIG. 1. One end 111 is fixedly coupled to the cutting machine 1 by a bolt (not shown) or the like. Mounting bracket 110 is made of a metal material such as stainless steel (Stainless Steel) as a whole, and removable by the magnetic force and the tool holder 120 through the magnetic member 125 fixed to the tool holder 120 Combined. However, the mounting bracket 110 may be made of a metal material that can be magnetized only in contact with the magnetic member 125 of the tool holder 120 and the remaining parts may be made of another material.

The tool holder 120 accommodates at least one tool T, usually a plurality of tools T, so that the cutting machine 1 can select a suitable tool T according to a predetermined work order. To this end, the tool holder 120 has a tool storage hole 121 through which a tool T is accommodated, as shown in FIGS. 1 and 2. In this case, the tool T is inserted into the tool storage hole 121 at a predetermined depth from the upper side of the tool holder 120. In the present embodiment, four tool storage holes 121 are formed in the tool holder 120, but the number of the tool storage holes 121 formed in the tool holder 120 may be appropriately changed. Accordingly, when the tool is required to be replaced, the cutting machine 1 moves the spindle (not shown) clamping the existing tool to the tool holder 120 to move the spindle to an empty one of the plurality of tool storage holes 121. The tool may be stored, and any one of the tools accommodated in the plurality of tool storage holes 121 may be selected and clamped.

The tool holder 120 is detachably coupled to the mounting bracket 110 through the magnetic member 125 as shown in FIGS. 2 to 4. In this embodiment, the magnetic member 125 is provided as a pair of magnetic balls 125. The pair of magnetic balls 125 are arranged at the rear side of the tool holder 120 at predetermined intervals in the longitudinal direction thereof. The magnetic ball 125 is fixed to the back side of the tool holder 125 in a ball shape as the name by a bonding method or an interference fit method. At this time, the magnetic ball 125 is fixed so that a portion (about 1/3 to 1/2 of the total size) protrudes from the surface of the tool holder 120 as shown in FIG. Meanwhile, the mounting bracket 110 accommodates the protruding portions of the pair of magnetic balls 125 at positions corresponding to the pair of magnetic balls 125 fixed to the tool holder 120 as shown in FIG. 2. A pair of ball coupling grooves 115 are formed on the front side thereof. Accordingly, the pair of magnetic balls 125 fixed to the rear side of the tool holder 120 is accommodated in the pair of ball coupling grooves 115 formed on the front side of the mounting bracket 110 made of a magnetizable metal material. By doing so, the tool holder 120 may be detachably coupled to the mounting bracket 110 by a magnetic force.

As such, the tool holder 100 according to the present embodiment is detachably coupled by the mounting bracket 120 and the magnetic force through the pair of magnetic balls 125 that the tool holder 120 is a magnetic member, the announcement holder ( When a force greater than or equal to a predetermined value is applied to the tool holder 120, the tool holder 120 may be separated from the holder bracket 110. Specifically, when the tool holder 100 according to the present embodiment performs an operation of clamping the tool T stored in the tool holder 120 in a state in which the cutting machine 1 has already clamped the tool due to a malfunction, Since the force clamped by the cutting machine 1 and the tool T accommodated in the tool holder 120 are applied to the upper portion of the tool holder 120 in a downward direction or more, the tool holder 120 is applied. ) Is separated from the bracket bracket 110 to fall to the lower side. Here, the force above a predetermined value refers to a force that can overcome the mutual coupling force of the tool holder 120 and the mounting bracket 110 by the magnetic member 125, the magnetic force, shape and It depends on the number.

 In particular, in the present embodiment, the magnetic member is provided as a magnetic ball 125 having a ball shape and is fixed to the tool holder 120 and the ball coupling groove 115 for accommodating the magnetic ball 125 in the mounting bracket 110 is provided. Since the tool holder 120 and the holder bracket 110 can be stably maintained within a certain range while being formed, the tool holder 120 can be stably separated from the holder bracket 110 and in the process of being separated. It is possible to minimize damage such as scratches that may occur. However, the magnetic member for coupling the tool holder 120 to the mounting bracket 110 in the present invention is not limited to the pair of magnetic balls 125 disclosed in this embodiment can be selected in various shapes, sizes and numbers. .

Accordingly, in the process of operating the tool holder 100 according to the present embodiment, the cutting machine 1 clamps the tool T stored in the tool holder 120 in a state in which the cutting machine 1 has already clamped the tool due to a malfunction. It can prevent possible safety accidents, breakdowns and breakdowns of parts. Here, the part includes a part of a cutting machine, a part of a tool holder, and a tool.

In addition, in the tool holder 100 according to the present embodiment, the tool holder 120 is detachably coupled to the holder bracket 110 through the magnetic member 125, so that the worker mounts the tool holder 120 to the holder bracket 110. ), Or the separation from the holder bracket 110 is simple and easy, it can be easily replaced by selecting a suitable tool holder 120 according to the cutting conditions given in the cutting machine (1).

On the other hand, in the present embodiment, a pair of magnetic balls 125, which is a magnetic member, is fixed to the tool holder 120, and a pair of ball coupling grooves 115 are formed in the bracket bracket 110. Alternatively, the bracket bracket ( A pair of magnetic balls 125 may be fixed to the 110, and a pair of ball coupling grooves 115 may be formed in the tool holder 120.

1, 2, 5 and 6, the tool height adjusting member 130 is a means for adjusting the storage height of the tool (T) accommodated in the tool holder 120, the tool holder 120 Support the tool (T) accommodated in the tool holder 120 in a coupled state. Here, the storage height of the tool (T) refers to the height of the tool (T) is exposed to the outside in the state accommodated in the tool holder 120, that is, the length from the upper surface of the tool holder 120 to the top of the tool (T). . The tool height adjusting member 130 has a hollow bolt shape as a whole and is inserted into the tool storage hole 121 at the lower side of the tool holder 120 and coupled to the tool holder 120 in a screwing manner.

The tool height adjusting member 130 is screwed to the tool holder 120 and the hollow body (131,133) is inserted into the lower end of the tool (T) accommodated in the tool holder 120, the inside of the hollow body (131, 133) It is formed on the side includes a tapered portion 135 for contact support for the tool (T) accommodated in the tool holder 120. In addition, the hollow bodies 131 and 133 may include a first body 131 which is screwed to the tool holder 120, and a lower end portion of the tool T which is extended upward from the first body and accommodated in the tool holder 120. It includes a second body 133 that is. At this time, the first body 131 is formed with a screw (131a) in at least a portion of the outer peripheral surface. The second body 133 has an outer diameter smaller than the outer diameter of the first body 131. The tapered portion 135 is formed on the inner side of the upper end of the second body 133 to contact and support the tool T inserted into the second body 133 to a predetermined depth.

Tool height adjusting member 130 having the above configuration is supported by the tool (T) housed in the tool holder 120, but can be moved in the vertical direction as it rotates, and thus the tool (120) The storage height of T) can be adjusted. In addition, the tool height adjusting member 130 may support the tool T having various sizes of diameters by supporting the tool T accommodated in the tool holder 120 by the tapered portion 135.

As such, the tool holder 100 according to the present embodiment moves the tool height adjusting member 130 supporting the tool T stored in the tool holder 120 in the up and down direction, thereby being accommodated in the tool holder 120. The storage height of the tool T can be adjusted. Accordingly, the tool holder 100 according to the present embodiment may accommodate tools T having various sizes (lengths or diameters) at a predetermined storage height required for the tool clamping operation of the cutting machine 1. In other words, since the tool holder 100 according to the present embodiment may correspond to a tool T having various sizes, the range of the tool T that can be accommodated is expanded.

1 and 2, the tool holder 100 according to the present embodiment is a protective cover 140 rotatably coupled to the holder bracket 110 to cover the holder bracket 110 and the tool holder 120. It further includes.

The protective cover 140 is coupled to the holder bracket 110 through a connection plate 143 fixed to the holder bracket 110. The protective cover 140 is rotatably provided around the hinge shaft 141 coupled to the connection plate 143. The protective cover 140 covers the holder bracket 110 and the tool holder 120 when the cutting machine 1 is cut, and the holder bracket 110 and the tool when the automatic tool exchange operation of the cutting machine 1 is performed. Open the holder 120. On the other hand, the opening and closing operation of the protective cover 140 is driven by the rotary motor 145 connected to the hinge shaft 141 of the protective cover 140.

As such, the tool holder 100 according to the present embodiment includes a protective cover 140 having the above configuration, so that the tool holder 100 is contaminated by cutting oil or cutting chips when cutting the cutting machine 1. It can prevent damage.

Referring to FIGS. 1 and 2, the tool holder 100 according to the present embodiment may have already been cut into the cutting machine 1 before the cutting machine 1 clamps the tool T stored in the tool holder 120. It further comprises a tool presence sensor 150 for checking whether there is a clamped tool.

Tool presence confirmation sensor 150 is coupled to the cradle bracket 110 with a portion protruding toward the tool holder 120 as shown in FIG. Meanwhile, the tool holder 120 has a first sensor seat for accommodating the protruding portion of the tool presence sensor 150 so that the tool presence sensor 150 does not interfere with the tool clamping operation of the cutting machine 1. Grooves 123 (see FIGS. 3 and 5) are recessed to a predetermined depth. As the tool presence sensor 150, a proximity sensor widely known as a non-contact detection type sensor may be used. Proximity sensor refers to a sensor used to detect the presence of object, pass through, continuous flow and control position by using electromagnetic force without physical contact. Proximity sensors can be classified into high frequency oscillation type, capacitive type, magnetic type, photoelectric type, ultrasonic type, etc., according to the detection principle. Can be mentioned.

The automatic tool change of the cutting machine 1 moves the spindle (not shown) of the cutting machine 1 clamping the existing tool to the tool holder 120 side, so that an existing one of the plurality of tool storage holes 121 is empty. Accommodating the tool, checking whether the tool is clamped in the cutting machine 1 by bringing the spindle of the cutting machine 1 close to the tool presence checking sensor 150, and the plurality of tool storage holes 121 And selecting and clamping any one of the tools housed therein. At this time, in the step of checking whether there is a tool clamped to the cutting machine 1, if it is confirmed that there is a tool clamped to the cutting machine 1 by the tool presence sensor 150 (for example, due to a malfunction When the step of accommodating the tool in the tool holder 120 is not performed properly), the step of accommodating the clamped tool in the tool holder 120 is performed again. On the other hand, if it is determined that there is no tool clamped to the cutting machine 1 by the tool presence sensor 150, the step of selecting and clamping any one of the tools stored in the plurality of tool storage holes 121 is performed. do.

As such, the tool holder 100 according to the present exemplary embodiment includes the tool presence sensor 150 having the above configuration, so that the cutting machine 1 has a tool holder even though the tool is clamped due to a malfunction. The operation of clamping the tool T stored in the 120 may be prevented in advance, thereby improving reliability of the automatic tool change system.

1 and 2, the tool holder 100 according to the present embodiment clamps the cutting machine T after the cutting machine 1 clamps the tool T stored in the tool holder 120. It further comprises a tool height measuring sensor 160 for measuring the clamping height of the tool (T). Here, the clamping height of the tool T refers to the height that the tool T is exposed to the outside in the state in which the tool T is clamped to the spindle (not shown) of the cutting machine 1.

The tool height measuring sensor 160 is coupled to the mounting bracket 110 in a state protruding toward the tool holder 120 as shown in FIG. Meanwhile, the tool holder 120 has a second sensor seating groove 122 for accommodating the tool height measurement sensor 150 so that the tool height measurement sensor 160 does not interfere with the automatic tool change operation of the cutting machine 1. 3 and 5) are recessed to a predetermined depth.

The cutting machine 1 clamps the tool T at a preset clamping height, whereby a difference may occur between the actual clamping height and the preset clamping height, depending on the degree of wear of the tool T. The problem of inferior precision of may be caused. Tool height measuring sensor 160 is to improve this problem, and measures the clamping height of the tool (T) clamped to the cutting machine (T) prior to performing the actual cutting with the exchanged tool (T) The measured data is transmitted to the cutting machine 1. Accordingly, the cutting machine 1 can correct the actual clamping height of the tool T to a preset clamping height based on the data transmitted from the tool height measuring sensor 160.

The measurement of the clamping height of the tool T by the tool height measuring sensor 160 is to move the lower end of the tool T clamped to the cutting machine 1 temporarily to contact the tool height measuring sensor 160 and then space it apart. Is done. As the tool height measuring sensor 160, a touch probe (Touch Probe), which is widely known as a height (or length) measuring sensor of a touch detection method, may be used.

As such, the tool holder 100 according to the present exemplary embodiment includes the tool height measuring sensor 160 having the above configuration, thereby increasing the clamping height of the tool T clamped to the cutting machine 1 of the tool T. The accuracy of cutting can be improved by allowing correction according to the degree of wear.

Meanwhile, the compressed air injection pipe 165 is provided at a position adjacent to the tool height measuring sensor 160 as shown in FIGS. 1 and 2. The compressed air injection pipe 165 sprays compressed air toward the tool height measurement sensor 160 so that foreign matter does not accumulate in the tool height measurement sensor 160. Accordingly, it is possible to prevent the clamping height of the tool T from being incorrectly measured due to the foreign matter present in the tool height measuring sensor 160.

It is apparent to those skilled in the art that the present invention is not limited to the above-described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to be belong to the claims of the present invention.

100: tool holder
110: holder bracket
120: tool holder
121: tool storage hole
125: magnetic member (magnetic ball)
130: tool height adjusting member
140: protective cover
150: tool presence sensor
160: tool height measuring sensor
165 compressed air injection pipe

Claims (14)

Tool holder for automatic tool change of cutting machine,
A cradle bracket coupled to one side of the cutting machine; And
At least one tool is accommodated, the tool is separated from the cradle bracket when the force is applied to the cradle bracket detachably coupled to the cradle bracket through a magnetic member is separated from the cradle bracket, characterized in that the automatic tool exchange Tool holder.
The method of claim 1,
The magnetic member,
Tool holder for automatic tool exchange of the cutting machine, characterized in that it comprises at least one magnetic ball coupled to the tool holder or the mounting bracket.
The method of claim 2,
The magnetic ball is fixed to protrude at least a portion of the tool holder,
The cradle bracket is a tool holder for automatic tool exchange of the cutting machine, characterized in that the ball engaging groove for receiving the protruding portion of the magnetic ball is formed in a position corresponding to the magnetic ball.
The method of claim 1,
The tool holder,
When the cutting machine clamps the tool housed in the tool holder while the tool is already clamped due to a malfunction, the tool for automatic tool replacement of the cutting machine, characterized in that separated from the bracket bracket and falling downward holder.
The method of claim 1,
In order to adjust the storage height of the tool accommodated in the tool holder, cutting further comprising a tool height adjusting member coupled to the tool holder to be movable in the vertical direction and supporting the tool stored in the tool holder Tool holder for automatic tool change of machine.
delete The method of claim 5,
The tool holder is formed with at least one tool receiving hole through which the at least one tool is inserted from above,
The tool height adjusting member is a tool holder for automatic tool change of the cutting machine, characterized in that inserted into the tool receiving hole from the lower side of the tool holder.
The method of claim 7, wherein
The tool height adjusting member,
A hollow body screwed to the tool holder and into which a lower end of a tool received in the tool holder is inserted; And
And a taper portion formed on the inner side of the hollow body to contact and support the tool housed in the tool holder.
The method of claim 1,
Tool holder for automatic tool change of the cutting machine further comprises a tool presence checking sensor for checking whether there is a tool clamped to the cutting machine before the cutting machine clamps the tool received in the tool holder. .
10. The method of claim 9,
The tool presence sensor is coupled to the mounting bracket with at least a portion protruding toward the tool holder,
The tool holder is a tool holder for automatic tool change of the cutting machine, characterized in that the first sensor seating groove for receiving the protruding portion of the tool presence confirmation sensor is formed in a predetermined depth.
The method of claim 1,
And a tool height measuring sensor for measuring the clamping height of the tool clamped to the cutting machine after the cutting machine clamps the tool housed in the tool holder. .
The method of claim 11,
And a compressed air spray pipe for spraying compressed air toward the tool height measuring sensor so that foreign matter does not accumulate in the tool height measuring sensor.
The method of claim 11,
The tool height measuring sensor is coupled to the mounting bracket with at least a portion protruding toward the tool holder,
The tool holder is a tool holder for automatic tool replacement of the cutting machine, characterized in that the second sensor seating groove for receiving the protruding portion of the tool height measuring sensor is formed in a predetermined depth.
The method of claim 1,
Further comprising a protective cover rotatably coupled to the holder bracket to cover the holder bracket and the tool holder,
The protective cover covers the holder bracket and the tool holder during cutting of the cutting machine, and the holder bracket and the tool holder are opened during the automatic tool exchange operation of the cutting machine. Tool holder for tool change.

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