KR102617694B1 - Tail stock of machine tool - Google Patents

Abstract

The present invention includes a quill supporting a workpiece; A slide portion that accommodates the quill; a housing portion that accommodates the slide portion; It relates to a mandrel of a machine tool, including a driving part that moves the slide part along the housing part, wherein the driving part generates thrust in the slide part by electromagnetic force generated by supplied power.

Description

Tail stock of machine tool

The present invention relates to a tailstock of a machine tool, and more specifically, to a tailstock of a machine tool that can miniaturize the tailstock and finely control the thrust of the quill by moving the quill and rod using electromagnetic force supplied to the driving unit. It's about.

In general, machine tools refer to machines used to process metal/non-metal workpieces into desired shapes and dimensions using appropriate tools using various cutting 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 NC boring machines, CNC lathes, and complex processing machines, are widely available in various industrial sites to suit the purpose of the work. It is being used.

Among machine tools, a complex machining machine refers to a turning center equipped with a multi-functional automatic tool changer (ATC) and tool magazine that performs various machining types such as turning, drilling, tapping, and milling. When an operator loads or exchanges tools required for processing in a multi-processing machine, he or she manually installs the tools into the tool magazine.

In general, various types of machine tools currently in use are equipped with operating panels that apply numerical control (NC) or computerized numerical control (CNC) technology. This operating panel is equipped with various function switches or buttons and a monitor.

In addition, a machine tool includes a table on which the workpiece material is seated and transported for processing the workpiece, a pallet to prepare the workpiece before processing, a spindle on which the tool or workpiece is combined and rotated, a tailstock to support the workpiece, etc. during processing, and an anti-vibration tool. etc. are provided.

In general, in machine tools, tables, tool rests, spindles, tailstocks, vibration stoppers, etc. are equipped with transfer units that transfer along a transfer axis to perform various machining.

Additionally, machine tools generally use multiple tools for various processing, and a tool magazine or turret is used as a tool storage location to store and store multiple tools.

These machine tools use multiple tools for various processing, and a tool magazine is used as a tool storage location to store multiple tools.

In addition, machine tools are generally equipped with an automatic tool changer (ATC, Automatic Tool Changer) for withdrawing or storing a specific tool from a tool magazine according to a command from a numerical control unit in order to improve the productivity of the machine tool.

Additionally, machine tools are generally equipped with an automatic pallet changer (APC) to minimize non-processing time. The automatic pallet changer (APC) automatically exchanges pallets between the workpiece machining area and the workpiece installation area. A workpiece can be mounted on a pallet.

Additionally, machine tools are generally classified into turning centers and machining centers depending on the processing method. Generally, in turning centers, the workpiece rotates, and in machining centers, the workpiece is processed while the tool rotates.

In general, a machine tool that can implement various machining processes such as turning, milling, drilling, tapping, and boring in one workpiece step is called a multi-task center or integrated mill turn center. Using these complex processing machines can reduce lead time, number of parts, workload, and work space, as well as improve productivity and precision.

A turning center, also called a double lathe, is a device that processes a workpiece by rapidly rotating the workpiece mounted on a spindle and then approaching the tool.

In particular, the turning center may include a tailstock for fixedly supporting the free end of the workpiece.

As shown in Figures 1 and 2, the tailstock 1 of a conventional machine tool supports the free end of a relatively long workpiece and prevents sagging or buckling of the workpiece, thereby improving the processing quality of the machine tool. It is installed movably.

In the tailstock 1 of a conventional machine tool, a quill 2 is installed on the spindle 3 to support the workpiece 9, and the spindle 3 is installed on the housing 4. Additionally, the quill (2) moves forward or backward by the operation of the cylinder (5).

In other words, when hydraulic pressure flows into the quill 2 through the forward hydraulic line 6, the spindle 3 moves forward, and at the same time, the quill 2 moves forward (see Figure 2). Additionally, the quill 2 moves forward. When hydraulic pressure flows in through the backward hydraulic line (7), the spindle (3) moves backward, and at the same time, the quill (2) moves backward (see Figure 3).

The quill (2) directly supports the rotating workpiece and rotates with the workpiece, which may cause wear or damage. Accordingly, the quill (2) needs to be replaced periodically or as often as necessary.

That is, when disassembling the quill (2) from the tailstock (1) of a conventional machine tool, the rocker nut (8) is loosened and the quill (2) is disassembled using the fastening force of the screw.

However, as the quill (2) supported a relatively heavy material, it was stuck or damaged inside the spindle inside the tailstock, so it was not easy to separate using the rocker nut, and the quill had to be disassembled by impacting the rod with a hammer, etc. This happened very frequently.

As shown in Figures 1 to 3, the tailstock of a conventional machine tool requires a lot of space as a separate hydraulic line and a control device or valve for hydraulic input and output must be installed to perform the forward or backward motion of the quill. Therefore, there was a problem that the structure of the tailstock of the machine tool was complicated and the manufacturing cost increased.

In addition, the tailstock of a conventional machine tool has a complicated structure and requires a lot of space, so there is a problem in that it cannot be miniaturized and lightweight.

Moreover, the tailstock of a conventional machine tool moves the quill forward or backward by hydraulic pressure, so the thrust of the quill cannot be precisely controlled due to the nature of hydraulic pressure, making it difficult to machine thin sheet-shaped workpieces or workpieces with weak durability. As the stock must be replaced or changed, manufacturing cost and time increase, and if the tail stock is not replaced or changed, the workpiece is damaged and processing precision is reduced.

In addition, the tailstock of conventional machine tools is replaced by impacting the rod with a rocker nut or hammer when replacing the quill, which causes operator inconvenience or safety accidents and causes damage to the rod or quill, increasing replacement cost and replacement time. There was a problem that the maintenance cost of the tailstock increased due to damage to the quill, rod, or other parts due to impact, etc.

Republic of Korea Patent Publication No. 10-2018-0113102 Republic of Korea Patent Publication No. 10-2018-0093562 Republic of Korea Registered Utility Model Publication No. 20-0135083

The present invention is to solve the above problems, and the purpose of the present invention is to form at least one part of the flange part, extension part, or coupling part with an electromagnet or to provide a separate electromagnet, and to supply these from the power supply part of the driving part. Electromagnetic force from the power source generates thrust on the slide part to move the slide part forward and backward or maintain the current position of the slide part, and moves the rod to facilitate disassembly of the quill, simplifying the structure and miniaturizing the tailstock. It promotes weight reduction and improves the precision and reliability of machine tools by effectively controlling the thrust of the Quill through effective control of the amount of power and power supply sequence. It can be used on a variety of workpieces to increase productivity by reducing non-processing time. In addition, as the movement of the rod is implemented by electromagnetic force, it provides a tailstock for machine tools that improves the operator's convenience when replacing the quill, reduces tailstock maintenance costs, and prevents safety accidents.

In order to achieve the purpose of the present invention, the tailstock of the machine tool according to the present invention includes a quill that supports the workpiece; A slide portion that accommodates the quill; a housing portion that accommodates the slide portion; and a driving part that moves the slide part along the housing part, wherein the driving part can generate thrust in the slide part by electromagnetic force generated by supplied power.

Additionally, in a preferred embodiment of the tailstock of a machine tool according to the present invention, the tailstock of the machine tool includes a support portion installed on the housing portion; and a rod movably installed inside the slide part and the support part to press the quill.

Additionally, in a preferred embodiment of the tailstock of a machine tool according to the present invention, the driving unit of the tailstock of a machine tool can move the rod by electromagnetic force generated by supplied power.

In addition, in a preferred embodiment of the tailstock of a machine tool according to the present invention, the housing portion of the tailstock of a machine tool includes a flange portion formed inside one side of the housing portion, and the support portion is coupled to and installed on the other side of the housing portion. joining part; and an extension portion extending from one side of the coupling portion into the interior of the housing portion.

Additionally, in a preferred embodiment of the tailstock of a machine tool according to the present invention, the slide portion of the tailstock of a machine tool includes a main body portion; a stepped portion formed on the outside of the main body portion and contacting the flange portion when the slide portion advances; and a contact portion that is recessed and formed inside the main body portion and contacts the extension portion when the slide portion moves backward.

In addition, in a preferred embodiment of the tailstock of a machine tool according to the present invention, at least one portion of the flange portion of the tailstock of a machine tool is formed of an electromagnet, and when power is supplied to the flange portion, the slide portion is moved by electromagnetic force. The quill may advance by generating a thrust on the slide part so that the step part contacts the flange part or approaches the flange part in a spaced state.

In addition, in a preferred embodiment of the tailstock of a machine tool according to the present invention, at least one part of the extension portion of the tailstock of the machine tool is formed of an electromagnet, and when power is supplied to the extension portion, the contact portion of the slide portion is generated by electromagnetic force. The quill may move backward by generating a thrust on the slide part so that it comes into contact with one side of the extension part or is brought closer to it.

In addition, in a preferred embodiment of the tailstock of a machine tool according to the present invention, the support portion of the tailstock of a machine tool may further include a pressurizing portion installed on the coupling portion to press the rod in a direction away from the quill. .

In addition, in a preferred embodiment of the tailstock of a machine tool according to the present invention, at least one part of the coupling portion of the tailstock of a machine tool is formed of an electromagnet, and when power is supplied to the coupling portion, one side of the rod is generated by electromagnetic force. In order to pressurize the quill, the rod may move forward so that the other side of the rod is in contact with the coupling portion or is spaced apart.

In addition, in a preferred embodiment of the tailstock of a machine tool according to the present invention, at least one part of the coupling portion of the tailstock of the machine tool is formed of an electromagnet, and when the power supply to the coupling portion is cut off, one side of the rod is In order to release pressing the quill, the rod may move backward by the elastic restoring force of the pressing portion so that the other side of the rod is spaced apart from the engaging portion.

Additionally, in a preferred embodiment of the tailstock of a machine tool according to the present invention, the driving part of the tailstock of a machine tool includes a first electromagnet installed on the flange portion; a second electromagnet installed in the extension part; a third electromagnet installed in the coupling portion; and a power supply unit that supplies power to the first electromagnet, second electromagnet, or third electromagnet.

In addition, in a preferred embodiment of the tailstock of a machine tool according to the present invention, the driving unit of the tailstock of a machine tool performs a supply sequence of current supplied from the power supply unit to the first electromagnet, the second electromagnet, or the third electromagnet. It may further include an electromagnet control unit that controls the intensity of the current or the direction of the current.

In addition, in a preferred embodiment of the tailstock of a machine tool according to the present invention, when the quill of the tailstock of a machine tool moves forward, the power supply to the second electromagnet and the third electromagnet is cut off from the power supply unit by the electromagnet control unit. Current is supplied only to the first electromagnet, and when the quill moves backward, power supply is cut off from the power supply unit by the electromagnet control unit to the first electromagnet and the third electromagnet, and current is supplied only to the second electromagnet, When the quill is separated, power supply to the first electromagnet from the power supply unit is cut off by the electromagnet control unit, and current may be supplied only to the second electromagnet and the third electromagnet.

In addition, in a preferred embodiment of the tailstock of a machine tool according to the present invention, the driving part of the tailstock of a machine tool includes an auxiliary power supply unit for supplying power to the first electromagnet, second electromagnet, or third electromagnet in an emergency; It may further include.

Additionally, in a preferred embodiment of the tailstock of a machine tool according to the present invention, a first cover portion installed on one side of the housing portion of the tailstock of a machine tool; and a second cover portion installed on the other side of the housing portion, wherein the first cover portion or the second cover portion may be formed of a non-magnetic material.

The tailstock of the machine tool according to the present invention forms at least one part of the flange part, extension part, or coupling part with an electromagnet, and generates thrust in the slide part through electromagnetic force generated by the power supplied to them from the power supply part of the drive part to slide the machine. By moving the part forward and backward, maintaining the current position of the slide part, and moving the rod, the quill can be easily disassembled, thereby simplifying the structure, making the tailstock smaller and lighter, and reducing the manufacturing cost of the tailstock. there is.

In addition, the tailstock of the machine tool according to the present invention is a quill coupled to the slide portion by effective control of the amount of power and power supply sequence supplied to at least one part of the flange portion, extension portion, or coupling portion, or to the first, second, and third electromagnets. It is effective in improving the precision and reliability of machine tools by effectively controlling the thrust.

Moreover, the tailstock of the machine tool according to the present invention can be used on thin sheet materials or various workpieces with weak durability through precise control of thrust, thereby reducing maintenance costs and maintenance time due to replacement or change of the tailstock, and non-processing. It has the effect of increasing productivity by reducing time and maximizing the processing precision of machine tools.

In addition, the tailstock of the machine tool according to the present invention realizes the movement of the rod for separating or replacing the quill by electromagnetic force, thereby improving the operator's convenience when replacing the quill and minimizing damage to other parts of the tailstock. It has the effect of reducing maintenance costs and preventing safety accidents.

Figure 1 shows a side cross-sectional view of the tailstock of a conventional machine tool in a retracted state.
Figure 2 shows a side cross-sectional view of the tailstock of a conventional machine tool in an advanced state.
Figure 3 shows a side cross-sectional view when disassembling the quill from the tailstock of a conventional machine tool.
Figure 4 shows a side cross-sectional view of the tailstock of the machine tool according to the present invention in a retracted state.
Figure 5 shows a side cross-sectional view of the tailstock of the machine tool according to the present invention in an advanced state.
Figure 6 shows a side cross-sectional view of the tailstock of the machine tool according to the present invention before quill disassembly.
Figure 7 shows a side cross-sectional view when disassembling the quill from the tailstock of the machine tool according to the present invention.

Hereinafter, the present invention will be described in detail with reference to drawings of the tailstock of a machine tool according to an embodiment of the present invention. The embodiments introduced below are provided as examples so that the idea 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. Also, in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numerals refer to like elements throughout the specification.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. These embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is provided. It is provided to fully inform those who have 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 specification. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of explanation.

The terminology used herein is for describing embodiments and is therefore not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprise” and/or “comprising” refers to the presence of one or more other components, steps, operations and/or elements. or does not rule out addition.

Figure 4 shows a side cross-sectional view of the tailstock of the machine tool according to the present invention in a retracted state, and Figure 5 shows a side cross-sectional view of the tailstock of the machine tool according to the present invention in a forward state. Figure 6 shows a side cross-sectional view before disassembling the quill from the tailstock of the machine tool according to the present invention, and Figure 7 shows a side cross-sectional view when disassembling the quill from the tailstock of the machine tool according to the present invention.

The definitions of terms used below are as follows. “Horizontal direction” refers to the horizontal direction in the same member, that is, the It means axial direction. In addition, upward (upper) means the upward direction in the “vertical direction,” that is, the direction toward the top of the Y axis in FIGS. 4 to 7, and downward (lower) means the downward direction in the “vertical direction,” that is, in FIGS. 4 to 7. In 7, it means the direction toward the bottom of the Y axis. In addition, “inside (inside)” refers to the side relatively close to the center of the same member, that is, the inside in Figures 4 to 7, and “outside (outside)” refers to the side relatively far from the center in the same member, that is, in Figure 4. refers to the outside in Figure 7. In addition, “one side” refers to the side relatively close to the workpiece in the same member, i.e., the left side of the same member in FIGS. 4 to 7, and “the other side” refers to the side relatively far from the workpiece in the same member, i.e., the side in FIGS. 4 to 7. In Figure 7, the right side is referred to based on the same member.

The tailstock 100 of a machine tool according to the present invention will be described with reference to FIGS. 4 to 7. As shown in Figures 4 to 7, the tailstock 100 of a machine tool according to the present invention includes a quill 10, a slide part 20, a housing part 60, and a drive part 40.

The quill (10) fixes and supports the free end of the workpiece (9). One side of the quill 10 protrudes from the slide portion, and a portion of the other side of the quill 10 is rotatably inserted into the slide portion. Specifically, one side of the relatively long workpiece 9 is clamped and fixed to a chuck (not shown in the drawing), and the other free end of the workpiece 9 is supported by the quill 10, whereby the workpiece 9 is held in place during processing. ) By preventing deflection or buckling, the processing quality can be improved and processing precision can be maximized.

Although not necessarily limited thereto, the quill 10 may have a predetermined rigidity and may be formed of a magnetic material. Additionally, the quill 10 may be made of a metal material. Accordingly, when power is supplied to the extension part 32 or the second electromagnet 52 through the power supply part of the driving part, which will be described later, the slide part 20 is moved by the electromagnetic force of the extension part 32 or the second electromagnet 52. You can easily move backwards.

Although not necessarily limited to this, one side of the quill 10 is formed in a cone shape so that it can easily support the first point of the rotating workpiece and rotate in conjunction with the workpiece.

The slide part 20 accommodates the quill 10 and is installed to be capable of linear reciprocating movement inside the housing part 60. That is, the slide unit 20 moves forward together with the quill 10 inserted into the slide unit 20 by the operation of the drive unit 40, which will be described later (in the left direction of the ) or backward (right direction of the X-axis in Figures 4 and 5, direction away from the workpiece).

Ultimately, the forward or backward movement of the quill 10 is achieved as the slide part 20 moves forward or backward within the housing part 60.

The housing portion 60 forms the overall appearance of the tailstock 100. The housing portion 60 may accommodate the slide portion 20 therein and may be formed with one side open so that the slide portion 20 can move forward and backward in the horizontal direction within the housing portion 60 . Additionally, if necessary, the other side of the housing portion 60 (toward the right of the

As shown in FIGS. 4 to 7, the flange portion 61 is formed inside one side of the housing portion 60. That is, the flange portion 61 is formed to protrude toward the center on one inner peripheral surface of the housing portion 60 to prevent the slide portion 20 from being separated from the housing portion 60 when the slide portion 20 advances. This prevents foreign substances such as chips from entering the housing unit 60, thereby preventing tailstock maintenance costs and damage to other components. The entire flange portion 61 or a portion of the flange portion 61 may be formed of an electromagnet.

The driving unit 50 moves the slide unit 20 forward and backward along the housing unit 60 by power supplied through a power supply unit to be described later.

That is, at least one part of the flange part is formed of an electromagnet, and when power is supplied to the flange part through the power supply part of the driving part, the step part of the slide part contacts the flange part or approaches the flange part by the electromagnetic force so that it is spaced apart from each other and approaches the slide part. Thrust is generated, and the slide part moves accordingly, causing the quill to move forward. During processing of the workpiece, when power is supplied to the flange part through the power supply part of the drive part as needed, thrust is generated on the slide part by electromagnetic force, and only pressure may be generated without moving the slide part to maintain the quill in contact with the workpiece.

Therefore, the tailstock of the machine tool according to the present invention can move the slide part forward or backward using electromagnetic force generated by power supplied from the power supply unit, and ultimately, by performing forward and backward movement of the quill, the structure is simplified and the tailstock is miniaturized. It can achieve weight reduction and reduce the manufacturing cost of the tailstock.

As shown in FIGS. 4 to 7, the tailstock 100 of the machine tool according to the present invention includes a support portion 30 and a rod 50.

The support part 30 is fixedly installed on the other inner side of the housing part 60. The support portion 30 prevents the slide portion 20 from being separated from the housing portion 60 when the slide portion 20 moves backward, stably supports the slide portion 20, and slides the slide portion 20. )'s backward motion and the forward motion of the rod 50, which will be described later, can be easily implemented. Although not necessarily limited to this, the support portion 30 may have a predetermined rigidity and may be formed of a magnetic material. Additionally, the support portion 30 may be formed of a metal material.

The rod 40 is movably installed inside the slide part 20 and the support part 30 so as to pressurize the quill 10 as needed. Although not necessarily limited thereto, the rod 40 may have a predetermined rigidity and may be formed of a magnetic material. Additionally, the rod 40 may be formed of a metal material.

When the quill is not easily disassembled and physical force must be applied to the quill 10, the rod 40 is operated by electromagnetic force generated by power supplied through the power supply 54 of the drive unit 50. ) moves forward (left in the X-axis direction in Figure 7, a direction approaching the workpiece).

Therefore, the tailstock of the machine tool according to the present invention simplifies the structure by moving the rod forward using electromagnetic force generated by power supplied from the power supply unit, thereby achieving miniaturization and weight reduction of the tailstock and reducing the manufacturing cost of the tailstock. You can.

In addition, as shown in FIGS. 4 to 7, the tailstock 100 of the machine tool according to the present invention may further include a first cover part 70 and/or a second cover part 80.

The first cover part 70 is installed on one side of the housing part 60. That is, the first cover part 70 is installed on one side of the housing part 60 (the left side of the housing part in FIGS. 4 to 7) in the direction approaching the workpiece to prevent chips or foreign substances from entering the tailstock. .

The second cover part 80 is installed on the other side of the housing part 60. That is, the second cover part 80 is installed on the other side of the housing part 60 (the right side of the housing part in FIGS. 4 to 7) to face the first cover part in a direction away from the workpiece to prevent chips from entering the tailstock. It prevents foreign substances from entering and supports the rod stably. ,

In addition, the first cover part 70 or the second cover part 80 is made of a non-magnetic material to prevent the electromagnetic force inside the tailstock from leaking out to the outside, thereby operating a stable electromagnetic force, and to prevent the electromagnetic force inside the tailstock from leaking out to the outside. It is possible to prevent chips from sticking to the first or second cover parts.

In addition, although not shown in the drawing, the tailstock of the machine tool according to the present invention may further include a socket for fixing the quill so that the quill can rotate simultaneously with the workpiece between the slide part and the quill, and a bearing for rotating the socket. there is.

As shown in Figures 4 to 7, the support part 30 of the tailstock 100 of the machine tool according to the present invention includes a coupling part 31, an extension part 32, and a pressing part 33.

The coupling portion 31 is coupled and installed on the other side of the housing portion 60. The other side of the housing portion 60 is closed by this coupling portion 31. The entirety of the coupling portion 31 or any part of the coupling portion 31 may be formed of an electromagnet.

The extension portion 32 extends from one side of the coupling portion 31 into the interior of the housing portion 60. That is, part or all of the extension portion 32 is formed to protrude to be inserted into a cavity that is formed to extend inside the contact portion 23 of the slide portion 20. The entire extension portion 32 or one portion of the extension portion 32 may be formed of an electromagnet.

Accordingly, when power is supplied to the extension unit through the power supply unit of the drive unit, a thrust is generated on the slide unit due to electromagnetic force so that the contact part of the slide unit touches one side of the extension unit or approaches while being spaced apart from each other, and the slide unit moves accordingly. The quill moves backwards (see Figure 5). Also, during processing of the workpiece, when power is supplied to the extension part through the power supply part of the drive part as needed, thrust is generated in the slide part by electromagnetic force and the quill is in contact with the workpiece. Only pressure may be generated without movement of the slide part to maintain .

Although not necessarily limited to this, the support portion is formed overall in a T shape.

The pressing part 33 is installed on the coupling part 31 and normally presses the rod 40 in a direction away from the quill. That is, the pressing portion 33 exerts an elastic force to always press the rod 40 in a direction away from the quill in normal times when disassembly of the quill is not necessary, so that no pressure is applied to the quill. This pressing portion 33 may be formed in the form of a coring spring or a leaf spring.

As shown in Figure 7, at least one part of the coupling part is formed of an electromagnet, so when power is supplied to the coupling part through the power supply of the driving part, one side of the rod is formed of a magnetic material to press the quill by electromagnetic force. The rods move forward (to the left in FIG. 7, moving to the left of the

On the contrary, as shown in FIG. 6, even when at least one part of the coupling part is formed of an electromagnet, when the power supply to the coupling part is cut off, the other side of the rod is spaced apart from the coupling part to release the pressing of the quill by one side of the rod. The rod moves backward (to the right in FIG. 6, moving to the right of the

Therefore, in the tailstock of the machine tool according to the present invention, the movement of the rod to separate or replace the quill is implemented by electromagnetic force rather than hydraulic power, so there is no need to apply shock to the rod with a hammer, etc. when replacing the quill, thereby improving the operator's convenience and convenience. It promotes safety, minimizes damage to other parts of the tailstock, reduces tailstock maintenance costs, and prevents safety accidents.

As shown in Figures 4 to 7, the slide part 20 of the tailstock 100 of the machine tool according to the present invention includes a main body part 21, a step part 22, and a contact part 23.

The main body portion 21 forms the overall outline of the slide portion 20. Although not necessarily limited to this, the main body 21 may have a predetermined rigidity and may be formed of a magnetic material. Additionally, the main body 21 may be made of a metal material.

The stepped portion 22 is formed to be stepped on the outside of the main body portion 21 and comes into contact with the flange portion 61 when the slide portion 20 advances. If the main body portion 21 is not made of a magnetic material or a metal material, a metal member is coupled to the step portion 22 or a portion of the step portion 22 is made of a magnetic material.

Accordingly, when power is supplied to the flange unit 61 or the first electromagnet 51 through the power supply unit 54 of the driving unit 50, which will be described later, the electromagnetic force of the flange unit 61 or the first electromagnet 51 As the slide part 20 easily moves forward in the direction of the arrow in FIG. 4, the step part 22 and the flange part 61 finally come into contact as shown in FIG. 5.

The contact portion 23 is formed recessed inside the main body portion 21 and contacts the extension portion 32 when the slide portion 20 moves backward. If the main body portion 21 is not made of a magnetic material or a metal material, a metal member is coupled to the contact portion 23 or a portion of the contact portion 23 is formed of a magnetic material.

Accordingly, when power is supplied to the extension part 32 or the second electromagnet 52 through the power supply unit 54 of the driving part 50, which will be described later, the electromagnetic force of the extension part 32 or the second electromagnet 52 As the slide part 20 easily moves forward in the direction of the arrow in FIG. 5, the contact part 23 and the extension part 32 finally come into contact as shown in FIG. 4.

4 to 7, the driving unit 50 of the tailstock 100 of the machine tool according to the present invention includes a first electromagnet 51, a second electromagnet 52, a third electromagnet 53, and a power source. It includes a supply unit 54, an electromagnet control unit 55, and an auxiliary power supply unit 56.

As described above, for the forward or backward motion of the quill or the forward motion of the rod, the entire flange portion (61), extension portion (32), coupling portion (31), and slide (20) or at least one portion are all made of magnetic material or It can be formed into an electromagnet. However, in order to maintain installation and rigidity, reduce manufacturing costs, promote assembly convenience, and prevent chips from sticking to the tailstock due to excessive electromagnetic force, the flange part, extension part, coupling part, and slide part themselves are electromagnets. Instead, the first, second, and third electromagnets may be provided separately.

That is, the first electromagnet 51 is installed in a part of the flange part 61, the second electromagnet 52 is installed in the extension part 32, and the third electromagnet 53 is installed in the coupling part 31. do.

The power supply unit 54 supplies power to the first electromagnet 51, the second electromagnet 52, or the third electromagnet 53. If, as described above, the entire flange portion, the extension portion, and the coupling portion, or at least one portion thereof, is formed of an electromagnet, the power supply unit supplies power to the flange portion, the extension portion, or the coupling portion.

The electromagnet control unit 55 includes a first electromagnet 51, a second electromagnet 52, or a third electromagnet 53 from the power supply unit 54, or a flange portion 61 formed of an electromagnet, an extension portion 32, Alternatively, the supply order and intensity or direction of the current supplied to the coupling unit 31 are controlled.

When the power supply unit is damaged or broken, the auxiliary power supply unit 56 suddenly stops supplying power to the first electromagnet (or flange part), the second electromagnet (or extension part), and the third electromagnet (or coupling part). It performs the function of supplying power to the first electromagnet (or flange part), the second electromagnet (or extension part), and the third electromagnet (or coupling part) in an emergency, such as when the workpiece is damaged or broken.

Accordingly, even when the power supply is suddenly interrupted through the power supply unit, power is stably supplied to prevent workpieces from falling or equipment malfunctions, minimizing damage to workpieces or machines, preventing safety accidents in advance, and preventing machine tool damage. Stability and reliability can be improved.

The tailstock 100 of the machine tool performs workpiece fixation and support operations according to the processing program and commands from the numerical control unit or PLC. These machine tools include a numerical control (NC) or computerized numerical control (CNC) unit and various numerical control programs are built in. In other words, the numerical control unit is equipped with the machining program of the machining unit and the operation program of the tool, and the corresponding program is automatically loaded and operated according to the operation of the numerical control unit.

This numerical control unit communicates with the tailstock 100, drive unit 50, power supply unit 54, electromagnet control unit 55, auxiliary power supply unit 56, and PLC using a predetermined protocol.

In addition, although not shown in the drawings, according to a preferred embodiment of the present invention, the numerical control unit includes a main operation unit, and this main operation unit includes a screen display program and a data input program according to screen display selection, and the screen display It displays software switches on the display screen according to the output of the program, recognizes the ON/OFF status of the software switches, and performs the function of issuing input/output commands for machine operation.

In addition, although not necessarily limited to this, the main operation unit is installed in the housing, case, or one side of the machine tool and includes various function switches or buttons and a monitor that can display various information.

PLC (Programmable Logic Controller) processes according to the processing program through communication with the tailstock 100, drive unit 50, power supply unit 54, electromagnet control unit 55, auxiliary power supply unit 56, and numerical control unit. The unit is driven, and power can be applied to the first, second, and third electromagnets, flange part, extension part, or coupling part through the power supply unit 54 as needed. That is, the PLC operates by receiving control commands according to the control program of the numerical control unit and the electromagnet control unit 55.

Although not shown in the drawing, the electromagnet control unit of the tailstock driving unit of the machine tool according to the present invention may include a basic data storage unit, a determination unit, a current amount calculation unit, and a signal unit.

Basic data such as the material of the workpiece being processed, the size and length of the workpiece, the forward and backward positions of the quill, and the forward position of the rod are stored in the basic data storage unit.

The judgment unit communicates with the numerical control unit and the PLC in real time to provide information on the current workpiece material, length, quill position, rod position, etc., and which electromagnet among the 1st, 2nd, and 3rd electromagnets is being powered by the power supply unit. judge.

The current amount calculation unit determines which electromagnet among the first electromagnet (or flange part), second electromagnet (or extension part), and third electromagnet (or coupling part) to apply the current according to the decision result of the judgment part and the necessary The amount of current is calculated based on the data from the basic data storage unit and the judgment result from the judgment unit.

In addition, the current amount calculation unit calculates not only the amount of current, but also the order in which the current should be applied to the first electromagnet (or flange part), the second electromagnet (or extension part), and the third electromagnet (or coupling part).

The signal unit transmits the current application order and amount of current calculated by the current amount calculation unit to the power supply unit or auxiliary power supply unit, and the calculated current power is supplied to the corresponding electromagnet by the power supply unit or auxiliary power supply unit.

In this way, the tailstock of the machine tool according to the present invention determines which electromagnet among the first electromagnet (or flange part), the second electromagnet (or extension part), and the third electromagnet (or coupling part) through the electromagnet control unit. By calculating the amount of current required for the corresponding electromagnet and precisely controlling the thrust of the quill that pressurizes the workpiece, it can be used on thin sheet materials or various workpieces with weak durability. It minimizes damage to the workpiece, improves processing precision, and improves machine tool durability. Safety and reliability can be maximized.

In addition, the tailstock of the machine tool according to the present invention reduces maintenance costs or maintenance time due to replacement or change of the tailstock for processing thin sheet materials or workpieces with weak durability, and increases productivity by reducing non-processing time. , the processing precision of machine tools can be maximized.

4 to 7, the operating principles of the forward or backward movement of the quill 10 or the slide part 20 and the forward or backward movement of the rod 40 of the tailstock 100 of the machine tool according to the present invention are explained. do.

As shown in Figure 5, when forward movement of the quill (movement to the left in the ) and the third electromagnet (or coupling part) are cut off, and current is supplied only to the first electromagnet (or flange part).

At this time, as shown in FIG. 5, the amount of current applied to the first electromagnet (or flange portion) is calculated and the amount of current is adjusted to determine the distance that the slide portion moves toward the first electromagnet (or flange portion) within the total S1 distance range. By precise adjustment, the thrust of the quill is precisely controlled. Accordingly, a thrust is generated on the slide part by electromagnetic force, and the slide part moves in the direction of the workpiece so that the step part of the slide part comes into contact with the first electromagnet (or flange part) or is spaced apart from the first electromagnet (or flange part) and approaches the first electromagnet (or flange part). This moves forward. That is, the step portion of the slide portion moves forward in the direction of the arrow in FIG. 4 toward the first electromagnet (or flange portion).

As shown in Figure 4, when backward movement of the quill (moving to the right in the The power supply is cut off to the branch) and the third electromagnet (or coupling part), and current is supplied only to the second electromagnet (or extension part).

At this time, the amount of current applied to the second electromagnet (or extension part) is calculated and the amount of current is adjusted to adjust the distance that the slide part moves toward the second electromagnet or extension part to precisely control the backward distance of the quill. Accordingly, a thrust is generated on the slide part by electromagnetic force, and the contact part of the slide part contacts the second electromagnet (or extension part) or the slide part moves so that it is close to the second electromagnet (or extension part) while being spaced apart from each other, causing the quill to move backwards. It moves. That is, the contact portion of the slide portion moves backward in the direction of the arrow in FIG. 5 toward the second electromagnet (or extension portion).

In addition, during machining of the workpiece, thrust is generated in the slide part through precise adjustment of the amount of current supplied to the first electromagnet (or flange part) or the second electromagnet (or extension part) as needed, and the quill is maintained in contact with the workpiece. Thus, only pressure may be generated without movement of the slide part.

As shown in Figure 7, when the quill needs to be separated and the quill needs to be pressed with a rod and the rod must move forward (the rod moves to the left in the X-axis direction to get closer to the workpiece), the current calculation unit of the electromagnet control unit By blocking the power supply to the first electromagnet (or flange part) from the power supply unit (or auxiliary power supply unit), current is supplied only to the second electromagnet (extension part) and the third electromagnet (coupling part).

At this time, the amount of current applied to the third electromagnet (or coupling part) is calculated and supplied as a power capable of generating an electromagnetic force greater than the elastic restoring force of the pressing part, and the rod moves as much as S2 in Figure 7 so that one side of the rod is connected to the other side of the quill. is pressurized. That is, the rod moves forward by S1 in the direction of the arrow in FIG. 7. Accordingly, in order for one side of the rod to press the quill by electromagnetic force, the rod moves forward so that the other side of the rod contacts the third electromagnet (or coupling portion) or approaches the third electromagnet (or coupling portion) while remaining spaced apart from each other. It is possible to pressurize the quill and easily separate it from the slide part.

As shown in Figure 6, when there is no need to separate the quill and there is no need to pressurize the quill with the rod, and the rod needs to move backwards (the rod moves to the right in the X-axis direction away from the workpiece), the power supply unit ( The power supply to the third electromagnet (or coupling part) is cut off from the auxiliary power supply unit), and the coupling part of the rod is elastically pressed by the elastic restoring force of the pressing part.

That is, the rod moves backward by S1 in the direction of the arrow in FIG. 7. Accordingly, the pressure applied by the rod to the quill can be easily released by the elastic restoring force of the pressing part, and the structure can be simplified to achieve miniaturization and weight reduction of the tailstock.

Therefore, the slide unit moves forward and backward through the electromagnetic force generated by the power supplied to the first electromagnet (flange part), the second electromagnet (extension part), and/or the third electromagnet (coupling part) from the power supply part of the driving part according to the present invention. By making it easier to disassemble the quill by moving it or moving the rod, the structure is simplified to achieve miniaturization and weight reduction of the tailstock, and the thrust of the quill is effectively controlled by effective control of the amount of power and power supply sequence to improve the machine tool. It improves precision and reliability and can be used on a variety of workpieces, increasing productivity by reducing non-processing time. The movement of the rod is also implemented by electromagnetic force, providing convenience to the operator when replacing the quill, and the tailstock. Maintenance costs can be reduced and safety accidents can be prevented.

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 skilled in the art will understand the present invention as described in the patent claims to be described later. It will be understood that the present invention can be modified and changed in various ways without departing from the spirit and technical scope. Therefore, the technical scope of the present invention should not be limited to what is described in the detailed description of the specification, but should be defined by the scope of the patent claims.

10: Quill 20: Slide part
21: main body 22: step portion
23: contact part 30: support part
31: coupling part 32: extension part
33: pressurizing part 40: rod
50: driving unit 51: first electromagnet
52: second electromagnet 53: third electromagnet
54: power supply unit 55: electromagnet control unit
56: Auxiliary power supply unit 60: Housing unit
61: Flange portion 70: First cover portion
80: second cover part

Claims (15)

A quill that supports the workpiece;
a slide portion that accommodates the quill;
a housing portion that accommodates the slide portion;
a driving unit that moves the slide unit along the housing unit;
A support portion installed on the housing portion; and
A rod movably installed inside the slide portion and the support portion to press the quill,
The driving unit generates thrust on the slide unit by electromagnetic force generated by the supplied power.
The driving unit moves the load by electromagnetic force generated by supplied power,
The housing part,
It includes a flange portion formed inside one side of the housing portion,
The support part,
A coupling portion coupled to and installed on the other side of the housing portion; and
It includes an extension portion extending from one side of the coupling portion into the interior of the housing portion,
The slide part,
main body;
a stepped portion formed on the outside of the main body portion and contacting the flange portion when the slide portion advances; and
A tailstock of a machine tool, comprising a contact portion that is recessed inside the main body portion and contacts the extension portion when the slide portion is retracted.
delete delete delete delete According to paragraph 1,
At least one portion of the flange portion is formed of an electromagnet,
When power is supplied to the flange part, a thrust is generated on the slide part by electromagnetic force so that the step part of the slide part comes into contact with the flange part or approaches the flange part in a spaced state, thereby causing the quill to advance. .
According to paragraph 1,
At least one part of the extension is formed of an electromagnet,
When power is supplied to the extension part, a thrust is generated on the slide part by electromagnetic force so that the contact part of the slide part comes into contact with one side of the extension part or is close to being pulled away, so that the quill moves backwards. Absolutely.
According to paragraph 1,
The support part,
The tailstock of a machine tool further comprising a pressurizing portion installed on the coupling portion to press the rod in a direction away from the quill.
According to clause 8,
At least one part of the coupling portion is formed of an electromagnet,
When power is supplied to the coupling unit, the rod moves forward so that one side of the rod presses the quill by electromagnetic force so that the other side of the rod contacts the coupling unit or approaches the coupling unit in a spaced state. The tailstock of a machine.
According to clause 8,
At least one part of the coupling portion is formed of an electromagnet,
When the power supply to the coupling part is cut off, the rod moves backward by the elastic restoring force of the pressing part so that the other side of the rod is spaced apart from the coupling part in order to release the pressing of the quill by one side of the rod. The tailstock of a machine tool.
According to paragraph 1,
The driving unit,
A first electromagnet installed on the flange portion;
a second electromagnet installed in the extension part;
a third electromagnet installed in the coupling portion; and
A tailstock of a machine tool, comprising: a power supply unit that supplies power to the first electromagnet, the second electromagnet, or the third electromagnet.
According to clause 11,
The driving unit,
An electromagnet control unit that controls the order of supply and the intensity or direction of the current supplied from the power supply unit to the first electromagnet, the second electromagnet, or the third electromagnet. Absolutely.
According to clause 12,
When the quill moves forward, power supply is cut off from the power supply unit by the electromagnet control unit to the second and third electromagnets, and current is supplied only to the first electromagnet,
When the quill moves backward, power supply is cut off from the power supply unit by the electromagnet control unit to the first and third electromagnets, and current is supplied only to the second electromagnet,
When the quill is separated, the power supply to the first electromagnet is cut off from the power supply unit by the electromagnet control unit, and current is supplied only to the second electromagnet and the third electromagnet. According to clause 13,
The driving unit,
The tailstock of a machine tool, further comprising an auxiliary power supply unit for supplying power to the first electromagnet, second electromagnet, or third electromagnet in an emergency.
According to paragraph 1,
A first cover part installed on one side of the housing part; and
It includes a second cover part installed on the other side of the housing part,
The tailstock of a machine tool, characterized in that the first cover part or the second cover part is formed of a non-magnetic material.

Images