KR200445788Y1 - Jig for numerical control machine tool - Google Patents

Abstract

A fixture is fixed to a bed of a milling machine to fix a workpiece to be machined. The fastener according to the present invention is a fixed table mounted on a bed of a conventional milling machine, a conventional agent mounted on one end of the fixed table so that the first indexing plate divided by the rotation of the first servo motor can rotate vertically. 1 indexing device, a pivot table, one end of which is mounted to the first indexing plate so that the other end is rotatably mounted to the other end of the fixed table, and the second indexing plate, which is divided and rotated by the driving of the second servomotor, can rotate horizontally. A conventional second indexing device mounted on top of the pivot table, a first backlash preventing means mounted on a fixed table facing the first indexing device so as to prevent backlashing of the first indexing device, and a second indexing device A second backlash prevention means, mounted on the pivot table, to prevent backlash .

Description

Workpiece fixtures for machine tools {JIG FOR NUMERICAL CONTROL MACHINE TOOL}

The present invention relates to a workpiece fixture for a machine tool, and more particularly, to a fixture for fixing a workpiece to be fixed to a bed of a milling machine (Milling Machine).

There are two main methods of cutting metal using cutting tools. Firstly, cutting is performed by contacting a pickled portion of a cutting tool fixed to a rotating metal workpiece, and secondly, a tool having a cutting edge, that is, a cutting insert, is fixed to a machine tool using a tool holder. After this, the workpiece is processed into a desired shape by contacting a workpiece which is fixed in advance while the cutting tool is rotated under such a condition.

The milling process belongs to the second method of the above cutting method, and the milling cutter is used to perform plane processing, side processing, right angle processing, groove processing, hole processing, and the like.

Conventional milling machines are generally used in which the cutting tool and the workpiece are machined vertically. However, when the machining part of the workpiece is inclined at an angle to the horizontal plane, or when the workpiece must be rotated, a separate fixture, for example, a jig, is used. , Index tables, rotary tables, etc., are fixed to the bed of the milling machine.

Recently, the above-mentioned fixtures are being manufactured in various situations in the situation in which workpieces having a complicated shape are increasing due to the development of industrial technology, and may include, for example, "Korea Patent No. 0677678".

The above-mentioned "Korean Patent No. 0677678" forms two rotational indexes vertically intersecting so as to be rotatable in two axes, and by dividing the partition plate of the rotational index to rotate and work the workpiece at a specified angle. An index table is disclosed. These index tables can be divided into equal angles at a certain angle, and at the same time, can be divided into specified angles and provide an index table that can be rotated in two axes to rotate and fix the workpiece at a desired angle or to rotate the workpiece in two axes. The effect is that the workpiece can be machined using a milling or drilling tool.

However, the above index table causes gear wear and backlash of the motor during continuous use, and in particular, the failure rate of the processing data is used due to the deterioration of the brake performance of the motor and the accumulation of mechanical fatigue in case of prolonged exposure to the moment of moment load. There was a problem that increases in proportion to the frequency.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is a first indexing device, a second indexing device disposed perpendicular to the rotational direction of the first indexing device, the first indexing device and By providing the first backlash preventing means and the second backlash preventing means for preventing backlash of the second indexing device, it is possible to prevent the backlash from occurring during the processing of the workpiece, thereby improving the processing precision of the workpiece. To provide a workpiece fixture for machine tools that can be made.

In order to achieve the object of the present invention as described above, the present invention,

A fixed table mounted to a bed of a conventional milling machine;

A conventional first indexing device mounted to one end of the fixed table such that the first indexing plate, which is divided and rotated by the driving of the first servomotor, can be vertically rotated;

A pivot table, one end of which is mounted to the first indexing plate and the other end of which is rotatably mounted to the other end of the fixed table;

A conventional second indexing device mounted on an upper portion of the turning table so that the second indexing plate, which is divided and rotated by the driving of the second servomotor, can be rotated horizontally;

First backlash preventing means mounted to a fixed table facing the first indexing device to prevent backlash of the first indexing device; And

A second backlash preventing means mounted to the swing table so as to prevent backlash of the second indexing device, wherein the fixing table comprises a fixed base plate fixed to the milling machine bed by a conventional tie bolt and a fixed base; A first fixing side wall and a second fixing side wall are formed to be perpendicular to both ends of the plate, and at the bottom of the fixing base plate, fitting ribs fitted into the T-shaped grooves formed in the milling machine bed protrude and are formed. Inside the side wall, a first indexing device is mounted, and the revolving table includes a revolving base plate, a first revolving side wall and a second revolving side wall formed perpendicular to both ends of the revolving base plate, and a first revolving side wall and a second revolving side wall. An auxiliary bed fixedly arranged on top of the pivot side wall, wherein the first pivot side wall is secured to the first indexing plate, and the second pivot The wall is pivotally mounted to the second fixed side wall by a hinge axis provided on the second pivot side wall, the auxiliary bed is formed with an exposed hole so that the second indexing plate can be exposed, and either the auxiliary bed or the second indexing plate One provides a workpiece fixture for a machine tool equipped with a vise for securing the workpiece.

As described above, according to the present invention, by providing the first backlash preventing means and the second backlash preventing means, the backlash caused by the aging of the first indexing device and the second indexing device during cutting of the workpiece is not delayed. It can be prevented, thereby maintaining the processing precision of the workpiece, can improve the stability and reproducibility of the machine, there is an advantage that the simple structure and easy operation and maintenance.

1 is a perspective view showing a workpiece fixture for a machine tool according to the present invention,

Figure 2 is a front view of the workpiece fixture for the machine tool shown in Figure 1,

3 is an enlarged view of the first backlash preventing means shown in FIG. 1, and

4 is an enlarged view of the second backlash preventing means illustrated in FIG. 1.

Explanation of symbols on the main parts of the drawing

100: workpiece fixture 110 for machine tools: fixed table

120: first indexing device 130: swing table

150: second indexing device 160a: first backlash preventing means

160b: second backlash prevention means

Hereinafter, with reference to the accompanying drawings will be described a workpiece fixture for a machine tool according to an embodiment of the present invention.

1 is a perspective view showing a workpiece fixture for a machine tool according to the present invention.

As shown, the workpiece fixture 100 for the machine tool according to the present invention is fixed to the table 110, the first indexing device 120, the first indexing device 120 mounted on one side of the fixed table 110 And a second indexing device 150 disposed on the pivot table 130 and arranged perpendicularly to the rotation direction of the first indexing device 120.

In addition, the workpiece fixture 100 for a machine tool according to the present invention is mounted on the fixed table 110 to face the first indexing device 120 to prevent a backlash of the first indexing device 120 The second backlash preventing means 160b, which is mounted on the pivot table 130 so as not to interfere with the first indexing device 150 and the second indexing device 150, prevents the backlash of the second indexing device 150. It is further provided.

2 is a front view of the workpiece fixture shown in FIG. 1.

1 to 2, the fixed table 110 is fixedly mounted to a bed (not shown) of a conventional milling machine (not shown). To this end, the fixed table 110 includes a horizontal fixed base plate 112 and a first fixed side wall 114a and a second fixed side wall 114b which are formed perpendicular to both ends of the fixed base plate 112.

As shown, the fixed base plate 112 is formed at the bottom of the fitting rib 116 is fitted into the T-shaped groove (not shown) formed in the bed of the conventional milling machine. In addition, the fixed base plate 112 is usually fixed to the bed of the milling machine by a tie (T) bolt 118.

The first indexing device 120 and the swing table 130 are disposed in the fixed table 110 formed as described above.

The first indexing device 120 adopts a conventional partition table in which the first indexing plate 124 is dividedly rotated by a predetermined angle by the driving of the first servomotor 122 as anyone can see. The first indexing device 120 is fixed on the inner surface of the first fixing side wall 114a to face the inner surface of the second fixing side wall 114b while rotating the first indexing plate 124 in the vertical direction. do.

The pivot table 130 includes a horizontal pivot base plate 132, a first pivot side wall 134a and a second pivot side wall 134b formed perpendicular to both ends of the pivot base plate 132, and a first pivot side wall. 134a and an auxiliary bed 136 fixedly disposed on top of the second pivot side wall 134b. The first pivot side wall 134a is fixed to the first indexing plate 124 and the second pivot side wall 134b is pivotally mounted to the second fixed side wall 114b. On the second pivot side wall 134b a hinge shaft 138 is rotatably fitted to the second fixed side wall 114b. On the other hand, a normal vice (not shown) is fixed to the upper portion of the auxiliary bed (136). To this end, a plurality of T-shaped grooves 140 are formed in the auxiliary bed 136. The second indexing device 150 is disposed in the pivot table 130 thus formed.

Like the first indexing device 120, the second indexing device 150 adopts a conventional partition table in which the second indexing plate 154 is divided and rotated by a predetermined angle by the driving of the second servomotor 152. do. This second indexing device 150 is fixed on the pivot base plate 132 to rotate the second indexing plate 154 in the horizontal direction. The second indexing plate 154 is disposed to be spaced apart from the lower part of the auxiliary bed 136 and is exposed to the outside of the auxiliary bed 136 when the auxiliary bed 136 is viewed from the top. To this end, the auxiliary bed 136 is formed with an exposure hole 142 to expose the second indexing plate 154. Preferably, a conventional vice (not shown) is fixed to the second indexing plate 154 exposed by the exposure hole 142 by a conventional method.

3 is an enlarged view of the first backlash prevention means shown in FIG. 1, and FIG. 4 is an enlarged view of the second backlash prevention means shown in FIG. 1.

1 to 4, the first anti-backlash means 160a is fixed perpendicularly to the normal first screw jack 162a and the hinge shaft 138 disposed outside the second fixing side wall 114b. And a first anti-backlash disk 164a to be mounted. Similarly, the second anti-backlash means 160b includes a conventional second screw jack 162b disposed above the turning base plate 132 and a second anti-backlash disc fixedly mounted to the second indexing plate 154. 164b is provided. As anyone can see, the first screw jack 162a and the second screw jack 162b are formed of a conventional screw jack in which the screw rods 168a and 168b linearly reciprocate by driving the motor units 166a and 166b. screw jack).

The motor portion 166a of the first screw jack 162a includes an auxiliary base plate 172 extending horizontally under the second fixed side wall 114b and an auxiliary vertical side wall extending vertically from the auxiliary base plate 172. 174). The screw rod 168a extending from the motor portion 166a of the first screw jack 162a penetrates through the second fixing side wall 114b and is mounted on the hinge shaft 138 to the first anti-backlash disk 164a. A plurality of dividing holes 170a radially disposed are inserted into the first anti-backlash prevention disk 164a into which the screw-shaped rod 168a moving toward the first anti-backlash prevention disk 164a is inserted.

On the other hand, the motor portion 166b of the second screw jack 160b is mounted on the upper portion of the turning base plate 132 so as not to interfere with the second indexing device 150. The screw rod 168b extending from the motor portion 166b of the second screw jack 160b extends toward the second anti-backlash disk 164b, and the second anti-backlash disk is provided on the second anti-backlash disk 164b. A plurality of split holes 170b into which the screw rod 168b moving toward the side 164b is inserted are arranged radially.

That is, the screw rods 168a and 168b of the first screw jack 162a and the second screw jack 162b are formed by the motor portions 166a and 166b of the first screw jack 162a and the second screw jack 162b. The first indexing device 120 and the second indexing device 150 are inserted into the dividing holes 180a and 170b of the first screw jack 162a and the second screw jack 162b by the operation of the first screw jack 162a. To prevent backlash.

Hereinafter, the state of use of the workpiece fixture 100 for the machine tool formed as described above will be briefly described.

First, the conventional vice of the auxiliary bed 136 or the second indexing plate 154 exposed to the exposed hole 142 of the auxiliary bed 136 is fixed. When the workpiece to be processed is rotated in the horizontal direction and the vertical direction, it is preferable to fix the vise to the second indexing plate 154, and when it is not necessary to rotate the workpiece horizontally, the vise on the auxiliary bed 136 It is preferable to fix it.

As such, when the vise is fixed to either the subbed 136 or the second indexing plate 154, the workpiece is bitten and the cutting operation is performed. In the meantime, in order to rotate the workpiece in the vertical direction or to rotate the workpiece in the vertical direction and then to the horizontal direction again, the first indexing device 120 and the second indexing device 150 are operated to operate the worker. Rotate the desired angle. The first indexing device 120 and the second indexing device 150 are operated by conventional methods.

As described above, when the workpiece is rotated by the operation of the first indexing device 120 and the second indexing device 150, the cutting operation is performed again. In this case, during the cutting operation, the first indexing device 120 In order to prevent the backlash of the second indexing device 150 from occurring, the first backlash preventing means 160a and the second backlash preventing means 160b are operated to prevent them.

That is, in order to prevent backlash, the first screw jack 162a and the second screw jack 162b are driven. The motor parts 166a and 166b of the first screw jack 162a and the second screw jack 162b When operated, the screw rods 168a and 168b are advanced by the operation of the motor units 166a and 166b. At this time, the screw rod 168a of the first screw jack 162a is fitted into the split hole 170a formed in the first anti-backlash disk 164a after passing through the second fixing side wall 114b, and the second screw jack. The screw rod 168b of 162b is fitted into the dividing hole 170b formed in the second anti-backlash disk 164b. In this manner, when the screw rods 168a and 168b of the first screw jack 162a and the second screw jack 162b are fitted into the dividing holes 170a and 170b, respectively, the first indexing device 120 generated during processing and The backlash of the second indexing device 150 can be prevented in advance.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the present invention described in the utility model registration claims. It will be appreciated.

Claims (6)

A fixed table mounted to a bed of a conventional milling machine; A conventional first indexing device mounted to one end of the fixed table such that the first indexing plate, which is divided and rotated by the driving of the first servomotor, can be vertically rotated; A pivot table having one end mounted to the first indexing plate and the other end rotatably mounted to the other end of the fixed table; A conventional second indexing device mounted on an upper portion of the pivot table so that the second indexing plate, which is divided and rotated by the driving of the second servomotor, can rotate horizontally; First backlash preventing means mounted to the fixed table so as to face the first indexing device so as to prevent backlash of the first indexing device; And And a second backlash preventing means mounted to the pivot table to prevent backlash of the second indexing device. The fixed table has a fixed base plate fixedly mounted to the milling machine bed by a conventional tie bolt, and a first fixed side wall and a second fixed side wall formed perpendicular to both ends of the fixed base plate. A fitting rib is inserted into a lower portion of the base plate to fit into a T-shaped groove formed in the milling machine bed, and the first indexing device is mounted inside the first fixing side wall. The pivot table includes a pivot base plate, a first pivot side wall and a second pivot side wall formed perpendicular to both ends of the pivot base plate, and an auxiliary part fixedly disposed above the first pivot side wall and the second pivot side wall. A bed, wherein the first pivot side wall is fixed to the first indexing plate, the second pivot side wall is pivotally mounted to the second fixed side wall by a hinge axis provided at the second pivot side wall, An exposure hole is formed in the auxiliary bed to expose the second indexing plate, and either of the auxiliary bed or the second indexing plate is mounted with a vise for fixing the workpiece. delete delete The method of claim 1, wherein the first anti-backlash means is fixed to the normal first screw jack disposed on the outside of the second fixed side wall, the hinge axis and the first screw jack is selectively fitted A first anti-backlash disk, The second anti-backlash means is a second screw backlash disposed on top of the pivot base plate, a second backlash prevention disk which is fixed horizontally to the second indexing plate, and the second screw jack selectively fitted Workpiece fixture for a machine tool, characterized in that it comprises a. The method of claim 4, wherein the first screw jack and the second screw jack, the screw rod is a linear reciprocating motion by the drive of the motor unit, The screw-type rod of the first screw jack extending from the motor portion of the first screw jack extends through the second fixing side wall to the first anti-backlash disk side, and the first anti-backlash disk includes the first A plurality of dividing holes into which the screw-type rod of the first screw jack moving toward the anti-backlash disk side is inserted are formed, The motor portion of the second screw jack is mounted on top of the pivot base plate so as not to interfere with the second indexing device, and the screw type rod of the second screw jack extending from the motor portion of the second screw jack is A plurality of dividing holes extending to the second anti-backlash disc side, the dividing holes into which the screw-type rod of the second screw jack inserted into the second anti-backlash disc side are inserted are formed; Machine fixtures. 6. The machine tool according to claim 5, wherein the first screw jack is mounted on an auxiliary base plate extending horizontally below the second fixed side wall, and an auxiliary vertical side wall extending vertically from the auxiliary base plate. Workpiece Fixture.