KR20220102254A - Workpiece ejector device for machine tools - Google Patents

Abstract

The present invention relates to a workpiece ejector device for a machine tool, comprising: a chucking unit which has a chuck installed at the front of a spindle body for clamping or unclamping a workpiece, a chucking cylinder installed at the rear of the spindle body, and a draw tube penetrating the spindle body between the chuck and the chucking cylinder; and an ejection unit for ejecting a finished workpiece from the chuck. The ejection unit includes: a housing portion which is installed adjacent to the chucking cylinder at the rear of the spindle body; a shaft portion of which the rear is coupled to the housing portion and which is arranged to penetrate through the inside of the chucking unit to be able to reciprocate in a straight line; a first support portion which is installed between the inner surface of the draw tube and the outer surface of the shaft portion to be located at the front of the shaft portion; and a second support portion which is detachably coupled to the rear of the chucking cylinder to be located at the rear of the shaft portion. Therefore, the present invention improves durability of the machine tool by increasing rigidity.

Description

Workpiece ejector device for machine tools

The present invention relates to a workpiece discharging device for a machine tool, and more particularly, a second support part located at the rear of the shaft part is detachably coupled to the rear of the chucking cylinder, and is long together with the first support part located in the front of the shaft part. It relates to a workpiece discharging device for a machine tool that can be accurately installed to support both ends of a shaft and to be positioned equally in the spindle axial direction.

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

Various types of machine tools, including turning centers, vertical/horizontal machining centers, door machining centers, Swiss turns, electric discharge machines, horizontal NC boring machines, CNC lathes, etc., are widely used in various industrial sites for their respective purposes.

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

In addition, the machine tool is a table on which the workpiece material is seated and transported for processing the workpiece, a pallet for preparing the workpiece before processing, a spindle that rotates when a tool or workpiece is combined, and a workpiece to support the workpiece during processing. It is equipped with a tailstock and a vibration isolator.

In general, in a machine tool, a table, a tool rest, a main shaft, a tailstock, a vibration isolator, etc. are provided with a conveying unit conveying along a conveying axis in order to perform various machining.

In addition, in general, a machine tool uses a plurality of tools for various processing, and there is a tool magazine or a turret in the form of a tool storage place that stores and stores a plurality of tools. will exchange

In general, machine tools are equipped with a chuck for clamping or unclamping a workpiece and a draw tube for clamping or unclamping the chuck. A clamping or unclamping operation is performed in the chuck.

In addition, the work piece clamped to the chuck after the machining of the work piece is completed is unclamped and the ejector drives the work piece forward and backward so that the work piece can be discharged from the chuck to the part catcher and pushes the work piece.

However, in the workpiece discharging device of the conventional machine tool, the shaft part for driving forward and backward in order to push and discharge the workpiece is extended in the axial direction and disposed inside the spindle. There was a problem that the long shaft was shaken or bent because only one was placed in the adjacent part.

In addition, in the workpiece discharging device of a conventional machine tool, the driving position of the shaft where the housing part for driving the shaft part forward and backward is far away from the support position where the shaft part is supported, and the weight of the housing part coupled and installed at the rear of the shaft part As they are added, there is a problem in that it is very difficult to assemble the shaft so that the centers of the shaft part and the housing part are positioned equally in the spindle axial direction in parallel as a whole.

In addition, since the workpiece discharging device of the conventional machine tool is disposed inside the spindle rotating at high speed, it may be affected by external force caused by the spindle rotation, and may be affected by external force generated in the process of clamping the chuck. There was a problem in that the shaft part malfunctioned because it was affected by the external force generated in the process of driving the shaft part forward and backward to discharge it.

Republic of Korea Patent Publication No. 10-2016-0136121

The present invention is to solve the above problems, and an object of the present invention is to provide a first support part in front of a shaft part which is disposed long penetratingly inside a spindle rotating at high speed, and a second support part chucking part in the rear part of the shaft part. A machine tool that can be attached and detached to the rear of the cylinder to support both ends of the shaft, accurately installing the shaft so that it is positioned equally in the spindle axial direction, and conveniently attaching and detaching the second support when the shaft is temporarily assembled. It is to provide a workpiece ejection device of

In order to achieve the object of the present invention, a workpiece discharging device for a machine tool according to the present invention is provided between a chuck installed in front of a spindle body to clamp or unclamp a workpiece, a chucking cylinder installed in the rear of the spindle body, and the chuck and the chucking cylinder. a chucking unit having a draw tube disposed through the spindle body; and a discharging unit discharging the processed workpiece from the chuck, wherein the discharging unit includes: a housing part installed adjacent to the chucking cylinder at the rear of the spindle body; a shaft portion disposed through the inside of the chucking unit such that the rear thereof is coupled to the housing portion to enable linear reciprocation; a first support part installed between an inner peripheral surface of the draw tube and an outer peripheral surface of the shaft part so as to be positioned in front of the shaft part; and a second support part detachably coupled and installed to the rear of the chucking cylinder so as to be positioned at the rear of the shaft part.

In addition, in another preferred embodiment of the work discharging device of the machine tool according to the present invention, the second support portion, the bearing portion is inserted into the outer peripheral surface of the shaft portion; and a base portion disposed behind the shaft portion in a state in which the bearing portion is accommodated.

In addition, in another preferred embodiment of the workpiece discharging device of the machine tool according to the present invention, the base portion, the main body portion is inserted into the rear of the hollow portion of the chucking cylinder; and a flange portion extending outwardly along a radial direction of the main body to fix the main body to the chucking cylinder.

In addition, in another preferred embodiment of the workpiece discharging device of the machine tool according to the present invention, the main body portion, the main body portion in order to detachably couple the main body portion to the chucking cylinder in a state in which the bearing portion is inserted and installed in the shaft portion An incision formed in part open; and an accommodating hole formed in the body part corresponding to the bearing part to accommodate the bearing part when the body part is detachably coupled to the chucking cylinder.

In addition, in another preferred embodiment of the workpiece discharging device of the machine tool according to the present invention, the body portion is formed to extend inwardly along the radial direction from the front of the receiving hole in order to prevent the bearing portion from being separated in the front of the body portion. It may include a stopper unit that becomes

In addition, in another preferred embodiment of the workpiece discharging device of the machine tool according to the present invention, the thickness of the stopper part is formed to be smaller than the thickness of the bearing part, and the diameter of the receiving hole is greater than or equal to the outer diameter of the bearing part. have.

In addition, in another preferred embodiment of the work discharging device of the machine tool according to the present invention, the second support portion, the cap portion detachably disposed at the rear of the base portion to prevent the bearing portion from being separated to the rear of the base portion ; may be further included.

The workpiece discharging device of a machine tool according to the present invention is provided with a first support and a second support for supporting a shaft extending in an axial direction inside a spindle to support both ends of the long shaft in a balanced manner by the weight of the shaft. As the shaft portion is prevented from shaking or the shaft portion is bent, the stability of the forward/backward operation of the shaft portion is improved, noise caused by malfunction of the shaft portion is reduced, and the durability of the machine tool can be improved by increasing the rigidity.

In addition, in the workpiece discharging device of the machine tool according to the present invention, the second support portion is adjacent to the housing portion to prevent the rear of the shaft portion from being sagged by the weight of the housing portion located at the rear of the spindle for forward and backward driving of the shaft portion. As it is coupled and installed at the rear of the chucking cylinder, it can be assembled precisely by aligning the center so that the centers of the shaft and housing are located in the same direction in the spindle axial direction, thereby increasing machining accuracy and maximizing the quality of the workpiece.

In addition, in the workpiece discharging device of the machine tool according to the present invention, the second support portion is detachably coupled to the rear of the chucking cylinder to support the rear of the shaft portion, so that the shaft portion and the housing portion are precisely positioned in the spindle axial direction. In addition, since the second support part can be easily attached or detached while the shaft part is temporarily assembled inside the spindle's main shaft rotating body, assembly is convenient, thereby promoting operator convenience and increasing productivity and work efficiency. .

1 shows a perspective view of a machine tool according to an embodiment of the present invention.
2 is a cross-sectional view of the workpiece discharging device in a state in which the bearing part of the second support part is inserted into the shaft part according to the embodiment of the present invention.
3 is a cross-sectional view of the workpiece discharging device in a state in which the base part of the second support part is coupled to the shaft part according to the embodiment of the present invention.
4 is a cross-sectional view of the workpiece discharging device in a state in which the second support part is attached to the chucking cylinder in a state in which the bearing part is accommodated in the base part according to the embodiment of the present invention.
FIG. 5 is an enlarged view of part A of FIG. 4 .
Figure 6 is a cross-sectional view showing the forward and backward movement of the shaft according to the embodiment of the present invention.
7 is a perspective view of a base portion according to an embodiment of the present invention.
8 shows a state in which the bearing part is coupled to the base part according to the embodiment of the present invention.
9 is a perspective view of a cap part according to an embodiment of the present invention.

Hereinafter, with reference to the drawings of the machine tool according to an embodiment of the present invention will be described in detail. The embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. And in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numbers refer to like elements throughout.

Advantages and features of the present invention, and a method of achieving them will become apparent 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 embodied in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of description.

The terminology used herein is for the purpose of describing the embodiments, and therefore is not intended to limit the present invention. In this specification, the singular also includes the plural, unless specifically stated otherwise in the phrase. As used herein, “comprise” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements mentioned. or addition is not excluded.

Figure 1 shows a perspective view of a machine tool according to an embodiment of the present invention, Figure 2 shows a cross-sectional view of the workpiece discharging device in a state in which the bearing part of the second support part is inserted into the shaft part according to the embodiment of the present invention.

3 is a cross-sectional view of the workpiece discharging device in a state in which the base part of the second support part is coupled to the shaft part according to the embodiment of the present invention, and FIG. 2 The cross-sectional view of the workpiece discharging device with the support part attached to the chucking cylinder is shown.

5 is an enlarged view of part A of FIG. 4 , and FIG. 6 is a cross-sectional view illustrating the forward and backward movement of the shaft according to the embodiment of the present invention.

7 is a perspective view of a base part according to an embodiment of the present invention, and FIG. 8 shows a state in which a bearing part is coupled to the base part according to an embodiment of the present invention.

9 is a perspective view of a cap part according to an embodiment of the present invention.

Definitions of terms used below are as follows. "Axial direction" means an axial direction in which the spindle rotates, and "radial direction" means a direction in which the spindle expands or contracts radially in the axial direction.

In addition, "front" means the left axially in the same member (ie, the left in FIGS. 2 to 6), and "rear" means the right in the axial direction in the same member (ie, the right in FIGS. 2 to 6). it means.

A work discharging device 1 of a machine tool according to a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 9 . 1 to 6 , the workpiece discharging device 1 of a machine tool according to an embodiment of the present invention includes a chucking unit 100 and a discharging unit 200 .

In the present invention, the machine tool may be any type of machine tool for processing a workpiece. For example, a machine tool may be composed of a turning center, a vertical/horizontal machining center, a door type machining center, a Swiss turn, an electric discharge machine, a horizontal type NC boring machine, a CNC lathe, and the like. An insertion hole 3 that is formed through the spindle body 2 of the machine tool is provided, and internal components such as a spindle and a discharging device 1 are disposed in the insertion hole 3 .

The chucking unit 100 of the workpiece discharging device 1 of the machine tool according to an embodiment of the present invention is configured for clamping or unclamping the workpiece. Referring to FIGS. 2 to 6 , the chucking unit 100 is a chuck 110 , a draw tube 120 and a chucking cylinder 130 are included.

The chuck 110 of the chucking unit 100 is disposed in front of the spindle body 2 of the machine tool, and directly clamps or unclamps the workpiece.

Specifically, while the chuck 110 is clamping the workpiece 5, the machining process of the workpiece 5 is made, and after the machining process is completed, the workpiece 5 is the chuck ( 110) is unclamped.

The draw tube 120 is installed between the chuck 110 and the chucking cylinder 130 , and specifically, the draw tube 120 is disposed in the insertion hole 3 formed through the spindle body 2 in the axial direction. It may be formed in the form of a tube extending to the

In addition, the draw tube 120 is provided with a through hole 121 that is formed through the axial direction therein, and is connected to the chuck 110 to clamp or unclamp the chuck 110 . That is, the draw tube 120 moves forward and backward in the axial direction according to the operation direction of the chucking cylinder 130 to clamp or unclamp the chuck 110 . Moving forward in the axial direction means moving in a direction adjacent to the chuck 110 (ie, moving to the left in FIG. 6 ), and moving backward in the axial direction is moving in a direction away from the chuck 110 , which is the opposite direction to the forward direction. (ie, moving to the right in FIG. 6 ).

The chucking cylinder 130 is installed at the rear of the spindle body 2 and is connected to the rear of the draw tube 120 to move the draw tube 120 forward and backward.

Specifically, the chucking cylinder 130 is installed at the rear of the spindle body 2 to move the draw tube 120 disposed through the spindle body 2 forward or backward, and the draw tube 120 moves forward or backward. The draw tube 120 clamps or unclamps the chuck 110 by the Chuck 110 clamps or unclamps workpiece 5 .

The chucking cylinder 130 is provided with a hollow portion 131 that is formed through the axial direction therein, but is not necessarily limited thereto. It may be formed as a hydraulic cylinder operated by an inflow or outflow hydraulic pressure.

The discharging unit 200 of the workpiece discharging device 1 of the machine tool according to an embodiment of the present invention is processed to be installed in the chucking unit 100 in order to discharge the processed workpiece 5 from the chuck 110 This is to increase the speed of the machining process by minimizing the non-working time to remove the completed work (5).

2 to 6 , the discharge unit 200 includes a housing part 210 , a shaft part 220 , a first support part 230 , and a second support part 240 .

The housing 210 of the workpiece discharging device 1 of the machine tool according to an embodiment of the present invention is disposed at the rear of the spindle body 2 and the housing 210 is installed adjacent to the chucking cylinder 130 . .

The housing part 221 forms a space that can accommodate a part of the shaft part 220, particularly the rear of the shaft part 220, but is not necessarily limited thereto. It is formed as a pneumatic cylinder operated by inflow or outflow pneumatic pressure, and the shaft 220 may be moved forward or backward by inflow or outflow pneumatic pressure.

In addition, the housing part 221 may be installed so that the center coincides with the shaft part 220 so that the workpiece 5 can be accurately pressed and discharged.

The shaft 220 is coupled to the housing 221 at the rear of the shaft 220 and extends through the inside of the chucking unit 100 so as to be linearly reciprocated.

The shaft 220 of the workpiece discharging device 1 of the machine tool according to an embodiment of the present invention may be moved by inflow or outflow pneumatic pressure, and when the shaft 220 moves backward, the workpiece 5 It is spaced apart so that the workpiece 5 can be smoothly processed, and when the shaft 220 moves forward, the workpiece 5 is pushed and the workpiece 5 is discharged.

The first support 230 of the workpiece discharging device 1 of the machine tool according to an embodiment of the present invention is located in front of the shaft 220, the inner peripheral surface of the draw tube 12 and the outer peripheral surface of the shaft 220 It is installed between and serves to support the front of the shaft 220 .

In addition, the first support part 230 is not necessarily limited thereto, but may be made of a bearing. In this case, the rotational force of the draw tube 120 rotating between the inner peripheral surface of the draw tube 12 and the outer peripheral surface of the shaft part 220 . It can be prevented from being transmitted to the shaft 220 .

And when the shaft part 220 moves forward or backward, the first support part 230 moves forward or backward together with the shaft part 220 .

The second support part 240 of the workpiece discharging device 1 of the machine tool according to an embodiment of the present invention is detachably coupled to the rear of the chucking cylinder so as to be located in the rear of the shaft part 220, the shaft part ( 220) serves to support the rear.

2 to 9 , the second support part 240 includes a bearing part 241 , a base part 242 , and a cap part 248 .

The bearing part 241 is inserted and installed on the outer peripheral surface of the shaft part 220 . Although not necessarily limited thereto. The bearing part 241 may be formed of a bearing, and in particular, may be formed of an oilless bearing. Oilless bearings are bearings without lubrication in areas where it is difficult or impossible to supply oil, such as high temperature, low temperature, corrosive environment, ingress of foreign substances, shock load and vibration, and structurally impossible points, etc. It can reduce the manpower and cost for refueling and improve productivity, and can be formed in various ways, such as wood, metal, plastic, and ceramics, depending on the conditions of use.

In addition, the bearing part 241 is inserted and installed on the outer peripheral surface of the shaft part 220 so that the shaft part 220 moving forward or backward can move smoothly, and the bearing part 241 is inserted and installed on the outer peripheral surface of the shaft part 220 . ) is seated in the receiving hole 245 of the base portion 242 .

The base part 242 is disposed at the rear of the shaft part 220 in a state in which the bearing part 241 is accommodated. That is, the base part 242 serves to accommodate the bearing part 241 inserted and installed on the outer circumferential surface of the shaft part 220 to couple the bearing part 241 to the rear of the chucking cylinder 130 . Specifically, the base part 242 includes a body part 243 and a flange part 247 .

The body part 243 of the base part 242 of the workpiece discharging device 1 of the machine tool according to an embodiment of the present invention is a hollow part 131 that is formed through the inside of the chucking cylinder 130 in the axial direction. It is a part inserted and installed at the rear and serves to couple the second support part 240 to the rear of the chucking cylinder 130 . 3 to 8 , the body part 243 includes a cutout 244 , an accommodation hole 245 , and a stopper part 247 .

The cutout 244 is formed open in a part of the body 243 in order to detachably couple the body 243 to the chucking cylinder 130 in a state in which the bearing part 241 is inserted and installed in the shaft part 220 . do.

Specifically, as will be described later, the shaft part 220 is the back of the hollow part 131 of the chucking cylinder 130 so that the rear of the shaft part 220 is linearly reciprocated while being temporarily coupled to the housing part 221 . Since it is inserted through the assembly so as to be disposed long through the inside of the chucking unit 100, in this case, the shaft portion 220 is already inserted into the hollow portion 131 of the chucking cylinder 130.

Therefore, in order to insert the main body 243 into the rear of the chucking cylinder 130 to support the shaft 220, when inserting the main body 243 into the rear of the chucking cylinder 130 through the cutout 244 . The shaft part 220 must pass through the rule so that the body part 243 and the shaft part 220 do not directly collide with each other.

That is, when the main body 243 is inserted into the rear of the chucking cylinder 130, the shaft 220 is passed through the cutout 244, so that it penetrates the inside of the chucking unit 100 and is disposed long. The body part 243 can be conveniently inserted into the rear of the chucking cylinder 130 without the need to remove or reassemble the shaft part 220 again, and even when the second support part 240 is replaced or detached as necessary. The chucking cylinder 130 without interference with the shaft 220 through the cutout 244 conveniently without the need to remove or re-assemble the shaft 220 that has already penetrated the inside of the chucking unit 100 and is long. It is possible to detach the body portion 243 from the rear of the.

As such, in the workpiece discharging device of the machine tool according to the present invention, the second support part is detachably coupled to the rear of the chucking cylinder to support the rear of the shaft part, so that the shaft part and the housing part can be precisely installed so that they are located in the same direction in the spindle axis direction. In addition, since the second support part can be easily attached or detached while the shaft part is temporarily assembled inside the main shaft rotating body of the spindle, assembly is convenient, so that the operator's convenience can be promoted, and productivity and work efficiency can be increased.

The accommodating hole 245 is formed in the body part 243 to correspond to the bearing part 241 to accommodate the bearing part 241 when the body part 243 is detachably coupled to the chucking cylinder 130 .

Specifically, the receiving hole 245 communicates with the cutout 244 and is recessed into a shape corresponding to the bearing portion 241 so that the bearing portion 241 inserted and installed in the shaft portion 220 can be seated. do.

That is, when the main body 243 is inserted into the rear of the chucking cylinder 130 , the shaft part 220 passes through the cutout 244 , and the bearing part 241 is inserted and installed on the outer peripheral surface of the shaft part 220 . ) is finally accommodated in the receiving hole 245 when the assembly of the workpiece discharging device (1) is completed.

The stopper part 247 is formed to extend inwardly along the radial direction from the front of the accommodation hole 245 in order to prevent the bearing part 241 from being separated in the front of the main body part 243 .

That is, the stopper part 247 is a bearing when the bearing part 241 inserted into the outer circumferential surface of the shaft part 220 is accommodated in the receiving hole 245 of the body part 243 during the assembly process of the workpiece discharging device 1 . It serves to fix the position of the bearing part 241 so that the part 241 does not deviate from the front of the body part 243 .

Referring to FIG. 5 , the thickness (t in FIG. 5 ) of the stopper part 247 of the workpiece discharging device 1 of the machine tool according to the present invention is formed smaller than the thickness T of the bearing part 241 .

If the thickness (t in FIG. 5) of the stopper part 247 is formed to be the same as the thickness T of the bearing part 241, or the thickness (t in FIG. 5) of the stopper part 247 is the bearing part 241. In the case of being formed larger than the thickness T of It cannot move properly, impairing the stability of the forward/backward operation of the shaft, generating noise due to malfunction of the shaft, and eventually losing its function, which may impair the durability of the machine tool.

In addition, referring to FIG. 5, the diameter of the receiving hole (l in FIG. 5) of the workpiece discharge device 1 of the machine tool according to the present invention may be formed to be greater than or equal to the outer diameter (L) of the bearing part.

If the diameter of the accommodating hole (l in FIG. 5) is smaller than the outer diameter (L) of the bearing part 241, the bearing part 241 cannot be stably accommodated in the accommodating hole, and the spindle or shaft rotating at high speed moves forward and backward. As the base part 242 of the second support part 240 is separated from the chucking cylinder 130 by the external force generated by the movement and cannot firmly support both ends of the shaft part, the center of the shaft part and the housing part moves in the spindle axial direction. Since precision machining is not performed by operating in a state that is not identically positioned on the

The flange portion 247 of the base portion 242 of the workpiece discharging device 1 of the machine tool according to an embodiment of the present invention is the body portion 242 to fix the body portion 242 to the chucking cylinder 130 . is formed to extend outward along the radial direction of

That is, the flange portion 247 is provided so that when the body portion 243 is inserted into the rear of the hollow portion 131 of the chucking cylinder 130, the main body portion 243 is disposed and fixed to the rear portion of the chucking cylinder 130. The flange part 247 is not inserted into the hollow part 131 of the chucking cylinder 130 but is contact-coupled to the rear of the chucking cylinder 130 .

In addition, the base portion 242 can be firmly coupled and fixed to the chucking cylinder 130 by screwing with the chucking cylinder 130 using bolts and nuts through the flange portion 247 .

The second support portion 240 of the workpiece discharging device 1 of the machine tool according to an embodiment of the present invention is a base portion 242 to prevent the bearing portion 241 from being separated to the rear of the base portion 242. It may further include a cap portion 248 that is detachably disposed at the rear of the.

Referring to FIG. 9 , specifically, the cap part 248 is a bearing part 241 when the bearing part 241 is inserted into the receiving hole 245 in a state in which the bearing part 241 is inserted and installed in the shaft part 220 . A portion of the cap part 248 is in contact with the bearing part 241 so that the temporary bearing part 241 is not separated to the rear of the base part 242 .

In addition, the cap part 248 is in contact with the bearing part 241 to fix the bearing part 241 , but the shaft part 220 to prevent the forward and backward movement of the shaft part 220 from being obstructed by the cap part 248 . ) and an opening 249 in which a part is formed openly so as not to come into contact with it.

Referring to FIG. 9 , although not necessarily limited thereto. Specifically, the open portion 249 of the cap portion 248 has an open shape, the upper portion is formed the same as the cut portion 244 of the base portion 242 in FIG. 9 , and the lower portion is radially in front of the receiving hole of the base portion. The stopper extending inward along the can be formed in the same shape as the formed stopper. When formed in this way, it is possible to prevent the separation of the bearing part 241 and at the same time prevent interference with the forward and backward movement of the shaft part.

As described above, the workpiece discharging device of the machine tool according to the present invention is provided with a first support and a second support for supporting the shaft portion extended in the axial direction inside the spindle to support both ends of the long shaft portion in a balanced manner, so that the weight of the shaft portion By preventing the shaft from shaking or the shaft from being bent, the stability of the forward/backward operation of the shaft can be improved, the noise caused by malfunction of the shaft can be reduced, and the durability of the machine tool can be improved by increasing the rigidity.

A method of assembling the second support part of the workpiece discharging device of the machine tool according to the present invention will be described with reference to FIGS. 2 to 6 .

In a state in which the housing part 210 is temporarily assembled at the rear of the shaft part 220 (in a state in which the bolts are half fastened), the bearing part 241 is first inserted and installed on the outer peripheral surface of the shaft part 220, and then the shaft part ( 220 ) is inserted into the hollow part 131 of the chucking cylinder 130 from the rear of the chucking cylinder 130 , and the shaft part 220 is temporarily disposed inside the chucking unit 100 .

After inserting the base part 242 into the shaft part 220 part (the shaft part 220 between the chucking cylinder 130 and the housing part 210) through the cutout 244 of the body part 243, the main body part The bearing part 241 is seated in the receiving hole 245 of the 243 .

In a state in which the bearing part 241 is seated in the receiving hole 245 of the body part 243, the base part ( 242) is coupled and fixed to the chucking cylinder 130 .

The cap part 248 is bolted to the flange part 247 while the shaft part 220 is inserted into the opening part 249 to couple and fix the cap part 248 to the base part 242 .

The front of the long shaft part is firmly supported through the first support part and the rear part of the shaft part is firmly supported through the second support part, and in a state in which the center of the shaft part is aligned in the axial direction, the housing part is fully bolted to fix the housing part.

As such, in the workpiece discharging device of the machine tool according to the present invention, the housing part is assembled in a state in which the housing part is assembled in order to prevent the rear of the shaft part from sagging by the weight of the housing part located at the rear of the spindle for forward and backward driving of the shaft part. The second support part is coupled to the rear of the chucking cylinder so that the second support part is installed adjacent to It is possible to maximize the quality of the work piece by increasing the accuracy of machining the work piece by realizing the precise operation of the dispensing device.

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

1: workpiece discharging device, 100: chucking unit,
110: chuck, 120: draw tube,
130: chucking cylinder, 200: discharge unit,
210: housing part, 220: shaft part,
230: first support, 240: second support,
241: bearing part, 242: base part,
228: cap.

Claims (7)

A chucking unit having a chuck installed in front of the spindle body to clamp or unclamp a workpiece, a chucking cylinder installed in the rear of the spindle body, and a draw tube disposed between the chuck and the chucking cylinder to pass through the spindle body; and
Including; a discharging unit discharging the finished workpiece from the chuck;
The discharge unit is
a housing part installed adjacent to the chucking cylinder at the rear of the spindle body;
a shaft part disposed through the inside of the chucking unit so that the rear is coupled to the housing part and linearly reciprocated;
a first support part installed between an inner peripheral surface of the draw tube and an outer peripheral surface of the shaft part so as to be positioned in front of the shaft part; and
and a second support part detachably coupled and installed to the rear of the chucking cylinder so as to be positioned at the rear of the shaft part.
According to claim 1,
The second support part,
a bearing part inserted and installed on the outer circumferential surface of the shaft part; and
and a base part disposed behind the shaft part in a state in which the bearing part is accommodated.
3. The method of claim 2,
The base part,
a body part inserted and installed in the rear of the hollow part of the chucking cylinder; and
and a flange part extending outwardly along the radial direction of the body part to fix the body part to the chucking cylinder.
4. The method of claim 3,
The body part,
a cutout formed in an open portion of the main body to detachably couple the main body to the chucking cylinder in a state in which the bearing unit is inserted and installed in the shaft; and
and an accommodating hole formed in the body portion corresponding to the bearing portion to accommodate the bearing portion when the main body portion is detachably coupled to the chucking cylinder.
5. The method of claim 4,
The body part,
and a stopper portion extending inward from the front of the receiving hole in a radial direction to prevent the bearing portion from being separated from the front of the body portion.
6. The method of claim 5.
The thickness of the stopper part is formed smaller than the thickness of the bearing part,
The diameter of the receiving hole is a workpiece discharging device of a machine tool, characterized in that formed to be equal to or greater than the outer diameter of the bearing portion.
3. The method of claim 2,
The second support part,
In order to prevent the bearing part from being separated to the rear of the base part, a cap part detachably disposed at the rear of the base part;

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