KR102324412B1 - Turret tool post and tool machine having the same - Google Patents

Abstract

The turret tool rest includes a tool rest base, a first turret fastened to the tool rest base, a first clamping device installed on one surface of the first turret, and a second turret that is detachably coupled to the first clamping device.

Description

Turret tool rest and machine tool having the same

The present invention relates to a turret tool rest and a machine tool having the same, and more particularly, to a turret tool rest used in a turning center and a machine tool having the same.

The tool stand used in machine tools such as turning centers requires mass production of component parts used in automobiles and general equipment. In some cases, the ability to complete multiple machining operations on one machine is required.

For example, there is a trend in turning centers to perform hole, tapping, and milling machining operations by employing a milling spindle for 3-axis machining for some tapping and simple milling, and to improve productivity and machining efficiency. However, since the number of tools installed in a general small turning center is limited to about 12, there is a limit in that it is not possible to use a sufficient number of tools required for turning and milling.

One object of the present invention is to provide a turret tool table capable of improving productivity and processing efficiency.

Another object of the present invention is to provide a machine tool having the above-described turret tool rest.

In order to achieve the above object of the present invention, a turret tool rest according to exemplary embodiments of the present invention includes a tool rest base, a first turret fastened to the tool rest base, and a first installed on one surface of the first turret. It includes a clamping device, and a second turret that is detachably coupled to the first clamping device.

In example embodiments, the first turret may include a 3-axis turret and the second turret may include a 2-axis turret.

In example embodiments, 12 or 16 milling tools may be mounted on the first turret and 12 turning tools may be mounted on the second turret.

In example embodiments, the second turret may include a first fixing pin for coupling with the first clamping device on a first surface facing the first turret.

In exemplary embodiments, the first clamping device includes a housing coupled to one surface of the first turret and having an insertion groove into which the first fixing pin of the second turret is inserted, sliding movement within the housing. It is provided so as to be possible and may include a fixing pin fixture for fixing the first fixing pin inserted into the insertion groove, and a driving mechanism for slidingly moving the fixing pin fixture.

In exemplary embodiments, the driving mechanism may include a cylinder formed in the housing, and a piston accommodated to be linearly movable within the cylinder and configured to press the fixing pin fixture.

In example embodiments, the turret tool rest may further include a second clamping device for clamping the second turret and separating the second turret from the first clamping device.

In example embodiments, the second turret may include a second fixing pin for coupling with the second clamping device on a second surface opposite to the first surface facing the first turret.

In order to achieve the above-described other object of the present invention, a machine tool according to exemplary embodiments of the present invention is installed on a bed to support and rotate the workpiece, the headstock being parallel to the longitudinal direction of the workpiece on the bed. A tool rest base installed to be movable in a first direction and a second direction orthogonal to the first direction, a first turret fastened to the tool rest base, a first clamping device installed on one surface of the first turret, and the It may include a second turret that is detachably fastened to the first clamping device.

In exemplary embodiments, the machine tool is provided with a second clamping device for clamping the second turret and separating the second turret from the first clamping device, and the second clamping device, the second It may further include a transport device for moving the clamping device in the first direction.

In exemplary embodiments, the transport device may include an exchange transport piston to which the second clamping device is mounted and movable along the first direction.

In example embodiments, the second turret may include a second fixing pin for coupling with the second clamping device on a second surface opposite to the first surface facing the first turret.

In exemplary embodiments, the machine tool may further include a partition disposed between the tool rest base and the transfer device and having an opening through which the second turret passes.

In exemplary embodiments, the machine tool is installed movably in the partition and may further include an exchange door for opening and closing the opening.

In example embodiments, the first turret may include a 3-axis turret and the second turret may include a 2-axis turret.

According to exemplary embodiments, the tool rest of the turning center may include a second turret (3-axis turret or 2-axis turret) detachably attached to the first turret (3-axis turret or 2-axis turret). For example, when 2-axis machining is required while using a 3-axis turret, a separately stored 2-axis turret can be mounted on the tool rest base using a transfer device and used. Thereafter, when 3-axis machining is required again, the 2-axis turret can be detached and transferred to a separate storage location, and the 3-axis turret can be used again.

Accordingly, it is possible to further extend the tool replacement cycle according to mass production, and efficiently process workpieces with complex shapes by performing various tooling on one machine, and minimize the interference between adjacent tools and workpieces during each machining. have.

However, the effects of the present invention are not limited to the above-mentioned effects, and may be variously expanded without departing from the spirit and scope of the present invention.

1 is a perspective view showing a machine tool according to exemplary embodiments.
2 is a perspective view illustrating a headstock and a turret tool rest inside the frame of FIG. 1 .
3 is a perspective view illustrating a turret tool rest according to exemplary embodiments.
Figure 4 is a side view of the turret tool rest of Figure 3;
FIG. 5 is a front view showing the turret tool rest of FIG. 3 .
6 is a perspective view illustrating the turret tool rest in a state in which the second turret is removed in FIG. 3 .
7 is a side view showing the turret tool rest of FIG.
8 is a front view showing the turret tool rest of FIG.
9 to 13 are diagrams illustrating a method of mounting and detaching a second turret to a first turret of a turret tool rest according to exemplary embodiments.
14A and 14B are cross-sectional views illustrating operations of first and second clamping devices of a turret tool rest according to exemplary embodiments.

With respect to the embodiments of the present invention disclosed in the text, specific structural or functional descriptions are only exemplified for the purpose of describing the embodiments of the present invention, and the embodiments of the present invention may be embodied in various forms. It should not be construed as being limited to the embodiments described in .

Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle. Other expressions describing the relationship between elements, such as "between" and "immediately between" or "neighboring to" and "directly adjacent to", should be interpreted similarly.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that the described feature, number, step, operation, component, part, or combination thereof exists, and includes one or more other features or numbers. , it is to be understood that it does not preclude the possibility of the presence or addition of steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as meanings consistent with the context of the related art, and unless explicitly defined in the present application, they are not to be interpreted in an ideal or excessively formal meaning. .

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and repeated descriptions of the same components are omitted.

1 is a perspective view showing a machine tool according to exemplary embodiments. FIG. 2 is a perspective view illustrating a headstock and a turret tool rest inside the frame of FIG. 1 . 3 is a perspective view illustrating a turret tool rest according to exemplary embodiments. Figure 4 is a side view of the turret tool rest of Figure 3; FIG. 5 is a front view showing the turret tool rest of FIG. 3 . 6 is a perspective view illustrating the turret tool rest in a state in which the second turret is removed in FIG. 3 . 7 is a side view showing the turret tool rest of FIG. 8 is a front view showing the turret tool rest of FIG.

1 to 8 , the machine tool 10 is installed on the bed 20 to support and rotate the workpiece W in the X-axis direction and the Z-axis direction on the headstock 30 and the bed 20 . It is installed to be movable and may include a turret tool rest 100 for mounting a plurality of tools T1 and T2.

In exemplary embodiments, the machine tool 10 may include a frame 12 that provides a working space. The bed 20 , the headstock 30 and the turret tool rest 100 may be accommodated in the frame 12 . The workpiece W may enter and exit through the gate 14 installed in the frame 12 for processing. The gate 14 may be formed over the front and top surfaces of the frame 12 . The main door 16 may open and close the gate 14 . When the gate 14 is opened by the main door 16 , the working space in the frame 12 may be opened. A transparent window is formed in the gate 14 , and an operator can observe the inside of the frame 12 through the transparent window.

The headstock 30 may be installed on one side of the bed 20 . The headstock 30 may include a chuck 32 for clamping the workpiece W. The chuck 32 may be rotated while being fixed to the spindle of the headstock 30 . Accordingly, the headstock 30 may rotate the work W in the C-axis direction.

The turret tool rest 100 includes a tool rest base 110 , a first turret 120 fastened to the tool rest base 110 , a first clamping device 140 installed on one surface of the first turret 120 , and a first It may include a second turret 130 coupled to the first turret 120 to be detachable by the clamping device 140 .

The tool rest base 110 may be installed to be movable in at least the X-axis direction and the Z-axis direction on the bed 20 . The tool rest base 110 may move along the X-axis guide formed extending in the X-axis direction inclined at a predetermined angle with respect to the horizontal plane of the bed 20 . The tool rest base 110 may move along the Z-axis guide formed extending in the Z-axis direction orthogonal to the X-axis direction. The Z-axis direction may be referred to as a first direction parallel to the longitudinal direction of the work W, and the X-axis direction may be referred to as a second direction parallel to the depth direction of the work W. FIG. In addition, the tool rest base 110 may move along the Y-axis guide formed extending in the Y-axis direction orthogonal to the X-axis direction and the Z-axis direction.

The first turret 120 may be rotatably mounted in front of the tool rest base 110 . A plurality of first tools T1 may be mounted on the circumference of the first turret 120 in the circumferential direction. The first tool may include various types of cutting tools. The first turret 120 may be rotated by a predetermined angle to select a specific tool. For example, a turret gear (not shown) inside the first turret 120 may be connected to a drive shaft of a servo motor disposed inside the tool rest base 110 to receive rotational force from the servo motor.

The first clamping device 140 may be installed on a front plane of the first turret 120 . A plurality of the first clamping devices may be installed on one surface of the first turret 120 . For example, two first clamping devices 140 may be installed on the first turret 120 .

The second turret 130 may be installed to be detachably attached to the first clamping device 140 . A plurality of second tools T2 may be mounted around the second turret 130 in a circumferential direction. The second tool may include various types of cutting tools.

The second turret 130 may include a fixing block 132 and a first fixing pin 133 (refer to FIG. 11 ). The fixing block 132 is attached to a first surface of the second turret 130 facing the first turret 120 , and on one surface of the fixing block 132 , a first fixing for coupling with the first clamping device 140 . A pin 133 may be formed. For example, two first fixing pins 133 may be formed on one surface of the fixing block 132 .

When the first fixing pin 133 is clamped in the insertion groove 142 of the first clamping device 140 , the second turret 130 is installed on the tool rest base 110 by the first clamping device 140 . can be When the first fixing pin 133 is unclamped from the insertion groove 142 of the first clamping device 140 , the second turret 130 may be detached from the first clamping device 140 .

When the second turret 130 is clamped by the first clamping device 140 , it may be rotated together by the rotation of the first turret 120 . Accordingly, the second turret 130 may be rotatably mounted in front of the tool rest base 110 . The second turret 130 may rotate at the same angle as the rotation angle of the first turret 120 to select a specific tool mounted on the second turret 130 .

For example, the first turret 120 may include a 3-axis turret and the second turret 130 may include a 2-axis turret. 12 or 16 milling tools T1 may be mounted on the first turret 120 , and 12 turning tools T2 may be mounted on the second turret 130 .

Therefore, since the 2-axis turret 130 can be detachably attached to the 3-axis turret 120 fastened to the tool rest base 110 , a total of 28 tools can be mounted. Accordingly, it is possible to reduce the machining time and improve the machining efficiency of the work piece by performing an efficient response to the complex work piece and the mass-produced work piece with one equipment.

In exemplary embodiments, the turret tool rest 100 clamps the second turret 130 and a second clamping device 150 for mounting and removing the second turret 130 from the first clamping device 140 . ) may be further included. The machine tool 10 may further include a transfer device 160 for mounting and transferring the second clamping device 150 . The transfer device 160 can move the second clamping device 150 to mount or detach the second turret 130 , and when the second turret 130 is not used, the detached second turret 130 is removed. can be kept

The machine tool 10 may further include a partition 40 installed between the tool rest base 110 and the transfer device 160 in the frame 10 . At one side of the partition 40, the tool rest base 110 is disposed and a work space for processing the workpiece W, and the transfer device 160 is disposed at the other side of the partition 40 to store the second turret 130. A storage space may be defined.

A first opening 41 extending through the chuck 32 and a second opening 42 through the second turret 130 may be formed in the partition 40 . As will be described later, the second turret 130 may be mounted after being transported toward the tool rest base 110 through the second opening 42 of the partition 40 , and the second turret 130 may be mounted on the tool rest. After being detached from the base 110 , it may be transported through the second opening 42 and then stored.

In addition, the headstock 30 may be installed through the partition 40 . The spindle unit of the headstock 30 is disposed on one side of the partition 40 , and the chuck 32 extends through the first opening 41 of the partition 40 to the work space of the other side of the partition 40 . can be placed within.

Hereinafter, a method of attaching and detaching the second turret to and from the first turret using the first and second clamping devices will be described.

9 to 13 are views illustrating a method of mounting and detaching a second turret to a first turret of a turret tool rest according to exemplary embodiments.

9 to 11 , first, the second opening 42 of the partition 40 may be opened and the second turret 130 may be moved from the storage space to the working space through the second opening 42 . .

The tool rest base 110 is installed in the working space on one side of the partition 40 , and the transfer device 160 is installed in the storage space on the other side of the partition 40 . The first turret 120 is fastened to the front plane of the tool rest base 110 , and the second turret 130 is detachably fastened to the second clamping device 150 installed on one side of the transfer device 160 . have.

The exchange door 44 is installed to be movable on one surface of the partition 40 to open and close the second opening 42 . The exchange door 44 can be moved linearly by the transfer cylinder 46 . The transfer cylinder 46 may open the second opening 42 by moving the exchange door 44 upward along the guide.

The transfer device 160 may include a transfer cylinder block and an exchange transfer piston 162 . The exchange transfer piston 162 may move forward and backward in the first direction (Z-axis direction) by the transfer cylinder block. A second clamping device 150 may be mounted on one side of the exchange transfer piston 162 . Accordingly, the exchange transfer piston 162 may move the second clamping device 150 toward the tool rest base 110 through the second opening 42 .

The second turret 130 may be installed to be detachably attached to the second clamping device 150 . The second clamping device 150 is attached to a second surface that is opposite to the first surface of the second turret 130 facing the first turret 120 , and is attached to the second surface of the second turret 130 . 2 A second fixing pin 134 for coupling with the clamping device 150 may be formed. For example, one second fixing pin 134 may be formed on the second surface of the second turret 130 .

When the second fixing pin 134 is clamped in the insertion groove 152 of the second clamping device 150 , the second turret 130 is coupled to the transport device 160 by the second clamping device 150 . can When the second fixing pin 134 is unclamped from the insertion groove 152 of the second clamping device 150 , the second turret 130 may be detached from the second clamping device 150 .

11 , the second turret 130 fastened to the second clamping device 150 moves through the second opening 42 and the first turret 120 fastened to the tool rest base 110 . moves in a direction opposite to the moving direction of the second turret 130 to become closer to each other.

12 and 13 , after the first clamping device 140 clamps the second turret 130 and the second turret 130 is separated from the second clamping device 150, the second clamping device ( 150) returns to the initial position.

The first fixing pin 133 of the second turret 130 is clamped in the insertion groove 142 of the first clamping device 140 , and the second fixing pin 134 of the second turret 130 is connected to the second clamping device. When unclamped in the insertion groove 152 of 150 , the second turret 130 may be installed on the tool rest base 110 by the first clamping device 140 .

The exchange transfer piston 162 may then move the second clamping device 150 to the initial position. In addition, the method of detaching the second turret 130 from the first turret 120 may be performed in a reverse order of the above-described mounting procedures.

Hereinafter, a clamping operation of the first and second clamping devices will be described.

14A and 14B are cross-sectional views illustrating operations of first and second clamping devices of a turret tool rest according to exemplary embodiments. The operations of the first and second clamping devices are the same or similar to each other. Accordingly, only the operation of the first clamping device will be mainly described.

14A and 14B , the first clamping device 140 has a housing 141 having an insertion hole 142 into which the first fixing pin 133 is inserted, and slides within the housing 141 to insert an insertion hole. It may include a fixing pin fastener 147 for fixing the first fixing pin 133 inserted into the 142, and a driving mechanism for sliding the fixing pin fastener 147 . The drive mechanism may include a cylinder 144 formed within the housing 141 , and a piston 146 , which is received to be linearly movable within the cylinder 144 and presses the fixing pin fixture 147 .

The housing 141 may be installed on a front plane of the first turret 120 . The piston 146 may be driven up and down by hydraulic oil such as pneumatic or hydraulic pressure. Hydraulic passages for driving the piston 146 may be formed in the housing 141 , and the hydraulic passages may be fluidly connected to an external hydraulic source through the center of the first turret 120 .

14A, when the piston 146 moves by hydraulic pressure to press the tapered pressing groove 147a of the fixing pin fastener 147, the piston 146 of the fixing pin fastener 147 is pressed. It moves in a direction orthogonal to the direction. Accordingly, as the fixing pin fixture 147 moves forward toward the pressing groove 147a in a direction opposite to the tensile force of the return spring 148 , the first fixing pin 133 of the second turret 130 is clamped by the first clamping force. may be clamped by device 140 .

14B, when the hydraulic pressure in the cylinder 144 is removed, the piston 146 moves to the initial position and the fixing pin fixture 147 moves backward from the pressing groove 147a by the tensile force of the return spring 148. By moving, the first fixing pin 133 of the second turret 130 may be unclamped from the first clamping device 140 .

Similarly, the housing of the second clamping device 150 may be installed on one side of the exchange transfer piston 162 . The piston of the second clamping device 150 may be driven up and down by hydraulic oil such as pneumatic or hydraulic pressure. Hydraulic passages for driving the piston may be formed in the housing, and the hydraulic passage may be fluidly connected to a hydraulic source through a fluid passage inside or outside the exchange transfer piston 162 .

As described above, the 2-axis turret 130 may be detachably attached to the 3-axis turret 120 . If 2-axis machining is required after using the 3-axis turret 120 , the 2-axis turret 130 stored at the storage location by the transfer device 160 may be mounted on the tool rest base 110 and used. Thereafter, when 3-axis machining is required again, the 2-axis turret 130 is separated and stored in a separate storage location to minimize interference with the workpiece W while the 3-axis turret 120 is in use.

3-axis machining (drilling, tapping, milling) of the workpiece W may be performed using the first tool T1 of the 3-axis turret 120 . For mass production, two 2-axis turrets may be installed on the tool rest base 110 . In addition, the number of the turrets to be additionally mounted is not limited. The 3-axis turret can be used when processing a rather complicated shape, and the 3-axis turret and the 2-axis turret can be selectively additionally mounted to perform various processing.

Accordingly, it is possible to further extend the tool replacement cycle according to mass production, efficiently process a workpiece having a complex shape, and minimize interference between adjacent tools and workpieces during each machining.

Although the above has been described with reference to the embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. You will understand that you can.

10: machine tool 12: frame
14: gate 16: main door
18: control panel 20: bed
30: headstock 32: chuck
40: partition 42: second opening
44: exchange door 46: transfer cylinder
100: turret tool rest 110: tool rest base
120: first turret 130: second turret
132: fixing block 133: first fixing pin
134: second fixing pin 140: first clamping device
141: housing 142: insertion groove
144: cylinder 146: piston
147: fixing pin fixture 147a: pressing groove
148: return spring 150: second clamping device
152: insertion groove 160: transfer device
162: exchange transfer piston

Claims (15)

delete delete delete delete delete delete delete delete a partition installed on the bed to define a working space for processing a workpiece on one side and a storage space for storing a turret on the other side, and having a first opening and a second opening;
a headstock disposed in the storage space of the other side of the partition on the bed, wherein a chuck for supporting and rotating a workpiece is disposed in the working space through the first opening of the partition;
a tool rest base disposed in the working space on one side of the partition on the bed and installed to be movable in a first direction parallel to the longitudinal direction of the workpiece and a second direction orthogonal to the first direction;
a first turret fastened to the tool rest base;
a first clamping device installed on one surface of the first turret;
a second turret detachably coupled to the first clamping device;
a second clamping device for clamping the second turret and for separating the second turret from the first clamping device; and
It is disposed in the storage space of the other side of the partition, the second clamping device is installed, and a transfer device for moving the second clamping device in the first direction,
The second turret clamped by the second clamping device in the storage space is transported by the transport device toward the tool rest base in the working space through the second opening of the partition by the first clamping device. is mounted on
In the working space, the second turret mounted on the first clamping device is detached from the first clamping device by the transport device and the second clamping device, and then transferred to the storage space through the second opening. Characterized machine tools. delete 10. The machine tool according to claim 9, wherein the transport device comprises an exchange transport piston mounted with the second clamping device and movable along the first direction. The machine tool according to claim 9, wherein the second turret includes a second fixing pin for coupling with the second clamping device on a second surface opposite to the first surface facing the first turret. . delete The machine tool according to claim 9, further comprising an exchange door that is movably installed in the partition and opens and closes the opening. The machine tool according to claim 9, wherein the first turret includes a three-axis turret and the second turret includes a two-axis turret.

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