KR102571179B1 - Machine tool - Google Patents

Abstract

The present invention frame; a feed spindle unit movably disposed on the frame from an original position to a forward processing position; a part recovery unit disposed on one side of the first spindle unit to recover parts; a parts transfer unit for transferring the parts recovered from the part recovery unit to the rearward direction of the original position; and a part discharge unit in which the part discharged from the part transfer unit is placed when the transfer spindle unit returns to its original position.

Description

Machine tool {MACHINE TOOL}

The present invention relates to a machine tool having an improved part recovery structure.

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.

Among machine tools, a multi-tasking machine refers to a turning center equipped with a multifunctional automatic tool changer (ATC) and tool magazine that performs various types of machining such as turning, drilling, tapping, and milling. In a multi-tasking machine, an operator loads or replaces tools necessary for machining by manually loading the tools into the tool magazine.

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, these machine tools may include a fixed left spindle and a movable right spindle for clamping both sides of the base material, respectively, and a fixed spindle for clamping one side of the base material and a movable tailstock for fixing the other side of the base material. can include

Conventionally, the base material on which processing is completed is referred to as a workpiece or a part, and in order to transfer these parts from the spindle to the outside, a part unloader and a part conveyor may be disposed in the machine tool.

However, in such a conventional machine tool, since the part unloader, part conveyor, and spindle are disposed in the machine tool in a mutually separated structure, the spindle must approach the part unloader after machining is finished, and then, the part The unloader must transfer the machined parts to the conveyor.

In addition, since the part unloader is fixed in the machine tool, for example, when the part unloader is located close to the right spindle, the left spindle is attached to the right spindle to separate the clamped part from the left spindle. There is an inconvenience that the part has to be transferred, and then the right spindle has to access the part unloader.

That is, since the part unloader and the part conveyor according to the related art are disposed independently from the spindle, there is a problem in that it takes time to transfer the processed part, and the processed material is exposed from chips or cutting oil scattered in the available area there is a problem with

In order to solve this problem, Korean Patent Laid-open Publication No. 10-2018-0113356 (title of invention: machine tool) solves the above problems to some extent by arranging a part unloader and a conveyor on the upper side of the spindle.

However, these conventional patents also do not have a device for perfectly transporting the processed part to the outside, and an accident may occur while a worker moves a heavy part on a conveyor.

Also, a problem may occur if the spindle is moved to the machining position before the part is completely moved on the conveyor.

Republic of Korea Patent Publication No. 10-2018-0113356

The present invention has been made to solve the above problems, and an object of the present invention is to implement a machine tool capable of quickly unloading, transporting and discharging processed parts.

Another object of the present invention is to block the inflow of foreign substances such as needles and coolants into the processing environment, and to prevent the movement of the spindle to the processing position before the part is completely discharged, thereby improving durability, productivity, and processing safety. in providing the machine.

A machine tool according to the present invention to achieve the object of the present invention is a frame; a feed spindle unit movably disposed on the frame from an original position to a forward processing position; a part recovery unit disposed on one side of the first spindle unit to recover parts; a parts transfer unit for transferring the parts recovered from the part recovery unit to the rearward direction of the original position; and a part discharge unit in which the part discharged from the part transfer unit is placed when the transfer spindle unit returns to its original position.

In addition, in another preferred embodiment of the machine tool according to the present invention, the machine tool further comprises a fixed spindle part fixed to the frame and arranged to correspond to the rotational axis of the feed spindle part, and the part recovery part supports the fixed spindle at the processing position. Parts processed by the department can be recovered.

In addition, in another preferred embodiment of the machine tool according to the present invention, the part recovery unit of the machine tool includes a part recovery unit housing disposed above the transfer spindle unit; a shaft disposed inside the part recovery part cover and moved to be exposed toward the front of the part cover to clamp the part; a parts recovery unit cover disposed in front of the recovery unit housing and opened when the shaft moves forward; and a gripper disposed on one end of the shaft to clamp the part.

In addition, in another preferred embodiment of the machine tool according to the present invention, the part transfer unit of the machine tool is disposed inside the part recovery unit housing to transfer parts, but one end of the conveyor is exposed to the rear of the part recovery unit housing. ; a door housing disposed behind the part recovery unit housing to accommodate the exposed end of the conveyor and having an open surface formed on one side; and a door cover that closes the open surface of the door housing when the transfer spindle unit moves forward and opens the open surface of the door housing when the transfer spindle unit returns to its original position.

In addition, in another preferred embodiment of the machine tool according to the present invention, the machine tool further includes a fixed housing fixed to one side of the frame, and the fixed housing has a bending bracket bent in the direction of the transfer spindle unit on one side. The door cover includes a protrusion protruding outward to be seated in the bending bracket when the transfer spindle unit returns to its original position from a processing position, one end disposed on the door housing and the other end disposed on the door cover. An elastic member providing a return force so that the door cover closes the open surface of the door housing when the transfer spindle unit is moved to the processing position may be included.

In addition, in another preferred embodiment of the machine tool according to the present invention, the part transfer unit of the machine tool may further include a transfer sensor disposed on the conveyor to detect that the part is transferred.

In addition, in another preferred embodiment of the machine tool according to the present invention, when a part is detected by the feed detection sensor in the machine tool, the feed spindle unit may not be moved from its original position.

In addition, in another preferred embodiment of the machine tool according to the present invention, in the machine tool, the transfer sensor is a beam sensor irradiated in a direction perpendicular to the moving direction of the conveyor, and is disposed in front of the transfer sensor on the conveyor A transfer guide for aligning the transferred parts may be further included.

In addition, in another preferred embodiment of the machine tool according to the present invention, the transfer guides of the machine tool are disposed on opposite surfaces of the conveyor, and the distance between them may be formed adjacent to each other in the direction of the transfer detection sensor.

In addition, in another preferred embodiment of the machine tool according to the present invention, the part discharge unit of the machine tool includes a bucket table disposed in a lower direction of the open surface of the door cover; a bucket disposed on the bucket table in which a part is placed; and a recovery guide disposed below the open surface of the door housing to guide parts to be placed in the bucket.

In addition, in another preferred embodiment of the machine tool according to the present invention, the part discharge unit of the machine tool may further include a recovery detection sensor disposed on the recovery guide to detect whether a part passes through the recovery guide.

In addition, in another preferred embodiment of the machine tool according to the present invention, the machine tool may not move the feed spindle unit from the original position when the part is not detected by the number detection sensor.

The machine tool according to the present invention has an effect of safely discharging parts processed by the transfer spindle unit or the fixed spindle unit to the outside by organically driving the part transfer unit and the part discharge unit.

In addition, the machine tool according to the present invention has the effect of improving the safety of driving the machine tool by having a feed sensor and / or a discharge sensor to prevent the transfer spindle unit from moving to the processing position during part discharge.

In addition, the machine tool according to the present invention has an effect of preventing foreign substances such as chips or coolant that may occur during processing from being introduced to the outside by the part recovery unit cover, the door cover, and the fixing housing.

1 shows a perspective view of a machine tool according to an embodiment of the present invention.
FIG. 2 shows a view in which the fixed housing and the part discharge part are removed from FIG. 1 .
FIG. 3 is a view showing that the part recovery unit is driven by moving the transfer spindle unit from the original position to the processing position in FIG. 2 .
4 shows a perspective view of a conveyor according to an embodiment of the present invention.
5 shows a view showing a state in which the door cover is opened from the inside of the door housing according to an embodiment of the present invention.
Figure 6 shows an enlarged view of the part discharge portion shown in Figure 1;

Hereinafter, a machine tool according to an embodiment of the present invention will be described in detail with reference to drawings. 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 perspective view of a machine tool according to an embodiment of the present invention, FIG. 2 shows a view in which a fixed housing and a part discharge part are removed in FIG. 1, and FIG. 3 is a moving spindle part in FIG. 2 from an original position to a processing position. Figure 4 shows a perspective view of a conveyor according to an embodiment of the present invention, Figure 5 is a state in which the door cover is opened from the inside of the door housing according to an embodiment of the present invention , and FIG. 6 shows an enlarged view of the part discharge portion shown in FIG. 1 .

1 to 6, the machine tool 100 according to an embodiment of the present invention largely includes a frame 110, a transfer spindle unit 120, a part recovery unit 130, a part transfer unit 140, and a part ejection unit. The unit 150 may be included, and a fixed spindle unit 160 and a fixed housing 170 may be further included.

1 to 3, the frame 110 is the base of the machine tool 100, and can be fixed to the ground or the floor to support the remaining components.

The transfer spindle unit 120 may be disposed to be movable on the frame 110 toward the original position and the processing position forward.

The transfer spindle unit 120 includes a ball screw 121 disposed on the frame 110 and rotated by a motor 122, and a transfer nut unit 123 meshed with the ball screw 121 and linearly moved. and a transfer spindle housing 124 disposed on the transfer nut part 123 and a transfer spindle 125 accommodated in the transfer spindle housing 124 to rotate the base material.

The fixed spindle unit 160 may be fixedly arranged to the frame 110 to correspond to the rotation axis of the transfer spindle unit 120 .

In addition, the transfer spindle unit 120 may be replaced with a tailstock for fixing the free end of the base material clamped by the fixed spindle unit 160. In this case, the part recovery unit 130 and the part transfer unit to be described later 140 may be disposed on one side of the tailstock.

Referring to FIGS. 2 and 3 , the part recovery unit 130 is disposed on one side of the transfer spindle unit 120 to recover parts.

Specifically, the part recovery unit 130 includes a part recovery unit housing 131 disposed above the transfer spindle unit 120 and disposed inside the part recovery unit housing 131 to clamp the part. A shaft 132 that is moved to be exposed to the front of the recovery unit housing 131, a part recovery unit cover 133 that is disposed in front of the recovery unit housing and opened when the shaft 132 moves forward, It may include a gripper 134 disposed at one end of the shaft 132 to clamp the part.

That is, the part retrieval unit 130 may retrieve a part that has been clamped and processed by the transfer spindle unit 120 or the fixed spindle unit 160 to be described later at the processing position of the transfer spindle unit 120 .

Referring to FIGS. 1 to 5 , the part transfer unit 140 may transfer the parts recovered from the part recovery unit 130 to the rear, which is the original position of the transfer spindle unit 120 .

Specifically, the part transfer unit 140 may include a conveyor 141, a door housing 142, a door cover 143, a transfer detection sensor 144 or a transfer guide 145.

The conveyor 141 is disposed inside the part recovery unit housing 131 to transport parts, and one end may be exposed to the rear of the part recovery unit housing 131 .

The door housing 142 may be disposed at the rear of the part recovery unit housing 131 to accommodate one end of the conveyor 141 exposed, and may be integrally formed with the part recovery unit housing 131, or Alternatively, it may be manufactured and mounted separately.

In addition, the door housing 142 may have an open surface 142a formed on one side of the door housing 142 to discharge the part transported by the part transfer unit 140 to a part discharge unit 150 to be described later. In this case, the door housing 142 The cover 143 closes the open surface 142a of the door housing 142 when the transfer spindle unit 120 moves forward, and when the transfer spindle unit 120 returns to its original position, the cover 143 closes the door housing ( The open surface 142a of 142 may be opened.

Referring to FIGS. 1, 3, and 5, a mechanism for opening and closing the door cover 143 according to an embodiment of the present invention is as follows, but is not limited thereto and may be implemented in various known methods.

The present invention may further include a fixed housing 170 fixed to one side of the frame 110 to prevent chips or coolant generated during processing from scattering to the outside.

In this case, the fixed housing 170 includes a bending bracket 171 bent in the direction of the transfer spindle unit 120 on one side, and the door cover 143 can be opened and closed by the bending bracket 171. can

Specifically, the door cover 143 includes a protrusion 143a protruding outward to be seated on the bending bracket 171 when the transfer spindle unit 120 returns to the original position from the processing position, and one end of the door housing. 142 and the other end is disposed on the door cover 143 so that when the transfer spindle unit 120 is moved to the processing position, the door cover 143 is disposed on the open surface 142a of the door housing 142. It may include an elastic member 147 that provides a return force to close.

The elastic member 147 may be implemented as a coil spring.

Therefore, when the transfer spindle is in the processing position, the door cover 143 closes the open surface 142a of the door housing 142 to prevent inflow of foreign matter, and in case the parts are transferred by the part transfer unit 140 It is possible to prevent damage in the machine tool 100 by preventing ejection of parts that may be in progress.

In addition, the part transfer unit 140 may further include a transfer detection sensor 144 disposed on the conveyor 141 to detect that the part is transferred.

When a part is detected by the feed detection sensor 144, the feed spindle unit 120 may not be moved from its original position, and the control and safety of the machine tool 100 is controlled by the feed sensor 144. this can be improved.

In addition, the transfer detection sensor 144 may be a beam sensor irradiated in a direction perpendicular to the traveling direction of the conveyor 141, or may be a photo sensor for detecting an image of a part being transferred.

When the transfer detection sensor 144 is an electron, a chip or coolant may be present on the machined part, which may cause a malfunction of the sensor.

Therefore, the part transfer unit 140 further includes a transfer guide 145 disposed in front of the transfer detection sensor 144 on the conveyor 141 to align the transferred parts, so that the transferred parts are connected to the beam sensor. collision can be prevented.

In addition, the transfer guides 145 are disposed on opposite surfaces of the conveyor 141, and the distance between them is formed adjacent to each other in the direction of the transfer detection sensor 144 to more effectively align the transferred parts. By contacting the side of the part being transported at the same time, the buried coolant can be removed.

In addition, the part transfer unit 140 has a curved portion 146 disposed on the conveyor 141 to change the direction of the part transferred from the conveyor 141 to the open surface 142a of the door housing 142. can include more.

The curved portion 146 may have a substantially curved shape bent from one side of the conveyor 141 to the other side.

Referring to FIGS. 1 and 6 , in the part discharge unit 150 , when the transfer spindle unit 120 returns to its original position, the part discharged from the part transfer unit 140 may be placed therein.

Specifically, the part discharge unit 150 is disposed on the bucket table 151 disposed in the lower direction of the open surface 142a of the door cover 143, and the part is placed on the bucket table 151. A bucket 152 and a collection guide 153 disposed below the open surface 142a of the door housing 142 to guide parts to be placed in the bucket 152 may be included.

The bucket table 151 may be fixed to the frame 110 or the inside floor of the machine tool 100 , and the bucket 152 may be detachably disposed on the bucket table 151 .

The recovery guide 153 may be formed as a substantially U-shaped plate material with an open upper surface.

In addition, the collection guide 153 is at a predetermined angle from the door housing 142 toward the bucket 152 so that parts are safely discharged from the open surface 142a of the door housing 142 to the bucket 152. It can be tilted and placed.

In addition, the part discharge unit 150 may further include a recovery detection sensor 154 disposed on the recovery guide 153 to detect whether a part passes through the recovery guide 153 .

When the part is not detected by the number detection sensor 154, the transfer spindle unit 120 may not be moved from the original position, and the control and Safety can be improved.

In addition, the number detection sensor 154 may be a beam sensor irradiated in a direction perpendicular to the ejection direction of the part, or may be a photo sensor for detecting an image of the ejected part.

In addition, the machine tool 100 according to the embodiment of the present invention can control the machine tool 100 by simultaneously using the detection of the transfer detection sensor 144 and the recovery detection sensor 154.

For example, when the transfer detection sensor 144 and the collection detection sensor 154 are sequentially turned on, it is determined that the discharge of the part is completed, and the next processing step can be started.

However, when the transfer detection sensor 144 is turned on and the number detection sensor 154 is off for a predetermined time, an error occurs in the part transfer unit 140 or the part discharge unit 150. It is determined that it has occurred, and the driving of the machine tool 100 may be stopped and an alarm may be provided to the operator.

In short, according to the present invention, the structure of the part transfer unit 140 and the part discharge unit 150 prevents foreign matter from flowing in and out, and the occurrence of defective products can be minimized by safely discharging parts to the outside, and the machine tool 100 It has the advantage of improving control and processing safety.

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 will find the scope of the present invention described in the claims to be described later. It will be understood that various modifications and changes can be made to the present invention without departing from the spirit and technical scope. 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.

100: machine tool 110: frame
120: feed spindle unit 121: ball screw
122: motor 123: transfer nut part
124: feed spindle housing 125: feed spindle
130: parts recovery unit 131: parts recovery unit housing
132: shaft 133: part recovery part cover
134: gripper 140: part transfer unit
141: conveyor 142: door housing
142a: open surface 143: door cover
143a: protrusion 144: transfer detection sensor
145: transport guide 146: curved portion
147: elastic member 150: part discharge unit
151: bucket table 152: bucket
153: recovery guide 154: recovery detection sensor
160: fixed spindle unit 170: fixed housing
171: bending bracket

Claims (12)

frame;
a transfer spindle unit disposed to be movable on the frame forward to an original position and a processing position;
a part recovery unit disposed on one side of the transfer spindle unit to recover parts;
a parts transfer unit that transfers the parts retrieved from the part recovery unit to the rearward direction of the original position of the transfer spindle unit; and
A part discharge unit in which the part discharged from the part transfer unit is placed when the transfer spindle unit returns to the original position; includes,
The parts recovery unit,
a part recovery unit housing disposed above the transfer spindle unit;
a shaft disposed inside the part recovery unit housing and moved to be exposed toward the front of the part recovery unit housing to clamp the part;
a parts recovery unit cover disposed in front of the recovery unit housing and opened when the shaft moves forward; and
A gripper disposed on one end of the shaft to clamp the part; includes,
The part transfer part,
a conveyor disposed inside the part recovery unit housing to transport parts, and having one end exposed to the rear of the part recovery unit housing;
a door housing disposed behind the part recovery unit housing to accommodate the exposed end of the conveyor and having an open surface formed on one side; and
A door cover that closes the open surface of the door housing when the transfer spindle unit moves forward and opens the open surface of the door housing when the transfer spindle unit returns to its original position,
Further comprising a fixed housing fixed to one side of the frame,
The fixed housing includes a bending bracket bent in the direction of the transfer spindle unit on one side,
The door cover includes a protrusion protruding outward to be seated on the bending bracket when the transfer spindle unit returns to its original position from a processing position, one end disposed on the door housing and the other end disposed on the door cover, and the transfer spindle unit processed. and an elastic member that provides a return force so that the door cover closes the open surface of the door housing when moved into position.
According to claim 1,
Further comprising a fixed spindle portion fixedly disposed to the frame so as to correspond to the rotational axis of the transfer spindle portion,
The part recovery unit is a machine tool capable of recovering a part processed by the fixed spindle unit at a processing position of the transfer spindle unit.
delete delete delete According to claim 1,
The part transfer unit is disposed on the conveyor and the machine tool further comprises a transfer detection sensor for detecting that the part is transferred.
According to claim 6,
A machine tool in which the feed spindle unit does not move from its original position when a part is detected by the feed sensor. According to claim 6,
The transfer detection sensor is a beam sensor irradiated in a direction perpendicular to the moving direction of the conveyor,
The machine tool further comprising a transfer guide disposed in front of the transfer sensor on the conveyor to align parts to be transferred.
According to claim 8,
The transfer guides are disposed on opposite surfaces of the conveyor, and a distance between them is formed adjacent to each other in the direction of the transfer detection sensor.
According to claim 1,
The part discharge part,
a bucket table disposed below the open surface of the door cover;
a bucket disposed on the bucket table in which a part is placed; and
A machine tool comprising: a recovery guide disposed below the open surface of the door housing to guide parts to be placed in the bucket.
According to claim 10,
The part discharge unit further includes a recovery detection sensor disposed on the recovery guide to detect whether a part passes through the recovery guide.
According to claim 11,
A machine tool in which the transfer spindle unit does not move from its original position when the part is not detected by the number detection sensor.

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