KR20160096308A - Tap processing automatic system - Google Patents

Abstract

The present invention relates to a tap processing automation system capable of controlling the speed change and direction change of rotation and linear movement during a tap processing stroke of a spindle by a first servomotor, a second servomotor and a control part organically controlling the servomotors and drastically improving productivity and product quality by designing an automation system which completes a tap process consisting of multiple stages by one operation of the spindle without movement of a workpiece using a compound-type tool in which a drilling region and a tap region are formed as a single body. To this end, according to the present invention, the tap processing automation system comprises: a driving part including a main drive pulley and a first motor for normal and reverse rotations of the main drive pulley; a driven part including a driven pulley connected to the main drive pulley by a belt and a spline shaft coupled to the driven pulley; a main shaft part including a spindle coupled to the spline shaft to allow rotational and linear movement and a spindle housing into which the spindle is inserted and on which a nut bracket is mounted to linearly move by normal and reverse rotations of a ball screw; a casing in which the spindle housing is installed to allow sliding; and a straight line moving means including a ball screw unit supported by the casing and linearly moving the main shaft part and a second motor for normally and reversely rotating the ball screw of the ball screw unit, wherein the first motor and the second motor comprise a servomotor and are organically controlled by the control part with each other.

Description

[0001] TAP PROCESSING AUTOMATIC SYSTEM [0002]

The present invention is characterized in that the shift and direction switching of the rotation and linear movement during the tapping stroke of the spindle is controlled by the first servo motor and the second servo motor and a control unit that controls them organically, A tap capable of significantly improving productivity and realizing an improvement in machining quality by implementing an automated system in which a multi-step tapping operation is completed by one operation of a spindle without movement of a workpiece by using a composite tool formed of a body Processing automation system.

Generally, tapping is performed in the order of drilling 101, tapping 102, and chamfering 103 for gathering a tap inlet by rotation and linear movement of the tool, as shown in Fig.

Open No. 10-1995-0011018 (published on May 15, 1995, entitled "COMPOSITE DRILL TOOL") for improving the productivity of tapping, and the like, and a variety of tools including a complex tool in which a drill and a tap are integrally formed Research and development are being carried out.

The composite type tool has a drill formed at the tip end thereof, and a tap is then formed, whereby drilling and tapping are performed on the workpiece by one operation of the single tool, which is advantageous in that the two tools can be replaced by one.

In addition, as disclosed in Patent Registration No. 10-1103326 (Registered on Dec. 30, 2011, entitled "Multi-Axis Combined Dedicated Machine)", the self-expander, which is generally used in automation systems for drilling or tapping, Can be adjusted.

2, a conventional pulley structure 200 includes a main pulley 202 directly connected to the driving motor 201, a main pulley 202 connected to the main pulley 202 through a belt 203, A spindle housing 207 in which the spindle 206 is mounted, a spindle housing 207 in which the spindle housing 207 is rotatably coupled to the spindle housing 204, A cylinder structure in which the casing 208 is an outer cylinder and the spindle housing 207 is a piston to linearly move the spindle housing 207 and the spindle 206; ≪ / RTI >

When the drive motor 201 and the main pulley 202 rotate, the driven pulley 205 and the splined shaft 204 rotate to rotate the spindle 206. When the cylinder hydraulic apparatus is operated, the spindle housing 207 The spindle 206 linearly reciprocates in the set stroke so that the tool 212 having the drill or tab mounted on the tool holder 211 returns to the original position after machining the workpiece repeatedly .

The conventional selftief 200 can adjust the RPM of the spindle 205 by adjusting the circumferential proportion of the driven pulley 205 relative to the driven pulley 202 and adjust the linear travel distance using the hydraulic device .

In FIG. 2, reference numeral 209 denotes a damper for buffering when moving linearly in the spindle housing.

Thus, while the conventional pulley 200 can adjust the rotational speed RPM by replacing the driven pulley 205, the driven pulley can not be replaced during the machining operation, so that the RPM of the spindle can not be adjusted during machining , There is a limitation that the hydraulic device can not be shifted during operation.

The combination of the rotational speed of the spindle and the linear travel distance during tapping is very important.

In the tapping step, the tool must be linearly moved at a pitch of one thread per revolution. If the same RPM and linear movement as in the tapping step are performed in the drilling step, the linear movement distance per RPM is large, , The load of the apparatus is excessive, and the drill tool is broken.

Therefore, in order to perform tapping using the composite tool in which the drill and the tab are formed as a single body, a high-speed rotation with a very short linear movement distance per 1RPM is performed in the drilling step. In the tapping step, The RPM shift and the linear shift must be followed according to the machining step.

Due to such a problem, the composite tool can only be mounted on a hand tool, and the conventional prior art selvider capable of an automatic system has a limitation in that it can not be applied due to a problem that the shift can not be made during the machining process.

Thus, in the tap processing automation system of the related art, since the selves equipped with the corresponding tools are drilled, tapped and chamfered separately and the workpieces are sequentially transferred, the investment cost of the production facility, the installation of the equipment and the work space are excessively wasted .

In addition, since one tapping process is performed by stepwise movement of the workpiece, the position of the machining apparatus and the position of the transferred workpiece may be inconsistent, resulting in poor accuracy and poor quality of the workpiece due to poor concentric accuracy .

In addition, the productivity is deteriorated due to the time loss due to the separate processing according to the process steps.

Published Patent Specification 1995-0011018 (published May 15, 1995) Patent Registration No. 10-2203326 (registered on December 30, 2011) Registered Patent No. 10-0677824 (Registered on Feb. 26, 2007) Patent Registration No. 10-0937828 (registered on Jan. 12, 2010)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-

It is an object of the present invention to provide a spindle control device capable of controlling the speed and direction of rotation and linear movement during a tapping stroke of a spindle by a first servo motor and a second servo motor and a control unit for controlling them organically, By using the composite tool formed by this single body, the multi-step tapped machining is completed by one operation of the spindle without movement of the workpiece, thereby realizing the improvement of the productivity and the improvement of the machining quality remarkably And an automatic tap processing system.

Another object of the present invention is to provide a tap processing automation system which can reduce production facilities investment costs, equipment installation, and work space by replacing a plurality of devices.

It is still another object of the present invention to provide a tapping automation system that eliminates the transfer of workpieces by machining steps and allows a multi-step process to be completed in one place, thereby significantly shortening the machining time.

According to an aspect of the present invention,

A driving unit including a main pulley and a first motor for rotating the main pulley in normal and reverse directions;

A driven pulley connected to the driven pulley by a belt and a spline shaft coupled to the driven pulley;

A spindle unit including a spindle configured to be rotatable and linearly movable with respect to the spline shaft, and a spindle housing having the spindle inserted therein and the nut bracket of the ball screw mounted thereon and linearly moved by normal and reverse rotation of a ball screw described later;

A casing in which the spindle housing is slidably installed;

And a linear movement unit supported by the casing and including a ball screw unit for linearly moving the main shaft unit and a second motor for rotating the ball screw of the ball screw unit in normal and reverse directions,

The first motor and the second motor are servomotors and are controlled organically by a control unit.

Preferably, the spindle is provided with a tool holder, and the tool to be mounted on the tool holder is a complex tool having at least two regions of a drill region, a tab region, and a chamfered region sequentially formed from one end to one body.

The composite tool may be formed with a drilled area, a tab area, a free area to allow the work area to deviate from the tab area, and a chamfer area.

The control unit may control the first servo motor and the second servo motor so that the spindle is operated by a drill tap processing course including a drilling mode, a tapping mode, and a reverse tapping mode.

The control unit may control the first servo motor and the second servo motor so that the spindle is operated by a drill tap and chamfering course including a drilling mode, a tapping mode, a chamfering mode, and a reverse tapping mode.

According to the tap processing automation system of the present invention configured as above, the rotation of the spindle and the linear movement of the spindle can be controlled by the first servo motor and the second servo motor that are freely controllable, and the drill area and the tap area are formed into a single body Type tool is mounted on the spindle, thereby realizing an automated system in which a multi-step tapping operation is completed by one-time operation of the spindle without movement of the workpiece, thereby remarkably improving mass production productivity.

In addition, there is an advantage that tap processing is performed by one operation of the spindle without movement of the workpiece, thereby remarkably improving tapping quality.

In addition, since it is possible to substitute a plurality of conventional devices as a single device, the investment cost of the production facility, the installation of the device, and the work space are significantly reduced.

In addition, there is an advantage that the machining time is significantly shortened by eliminating the transfer of the workpiece by the machining step and completing the multi-step machining in one place.

1 is a view showing a general tap forming process
Fig. 2 is a front view showing a configuration of a conventional self-
3 is a front view showing the configuration of the selvider according to the present invention;
Fig. 4 is a plan view of Fig. 3
5 is a front view of a composite tool according to an embodiment of the present invention;
Figure 6 is a flowchart of a control system in an embodiment according to the present invention.
7 is a flowchart of a control system in an embodiment according to the present invention.

Hereinafter, embodiments of the tap processing automation system of the present invention will be described in detail with reference to the accompanying drawings.

3 and 4, a tap processing automation system 1 according to an embodiment of the present invention includes a main pulley 11 and a first motor 13 for rotating the main pulley 11 in the forward and reverse directions A follower 20 including a driven pulley 21 connected to the driven pulley 11 by a belt 23 and a spline shaft 25 coupled to the driven pulley 21, A spindle 31 which is rotatably and linearly movable with respect to the spline shaft 25 and a spindle 31 is inserted and the nut bracket 37 of the ball screw is mounted, A main shaft portion 30 including a linearly moving spindle housing 35, a casing 40 on which the spindle housing 35 is slidably mounted, a main shaft portion 30 supported by the casing 40, The ball screw unit 51 for moving the ball screw unit 511 and the ball screw unit 511 And a linear movement means 50 including a second motor 53 for rotating the first motor 13 and the second motor 53. The first motor 13 and the second motor 53 are connected to a control unit 60 They are mutually organically controlled.

5, the tool mounted on the tool holder 32 includes a drill region 331, a tab region 331, (333), and a chamfered area (335) are sequentially formed on at least two areas of the composite tool (33).

The composite tool includes a drilled area 331, a tab area 333, a free area 334 and a chamfered area 335 at least corresponding to the thickness of the workpiece so that the tab area can be displaced from the workpiece .

The spindle 31 has a structure in which a spline portion corresponding to the spline shaft is formed to have a length capable of linear movement on an inner peripheral surface so as to be coupled with the spline shaft 25 so that the spindle 31 can rotate, A structure in which a spindle 31 is interlocked with the linear movement of the spindle housing 35 and a structure in which a linear movement of the spindle housing 35 in the casing 40 is guided Since the configuration is a well-known technology in the selfteader, a detailed description will be omitted.

The ball screw unit 51 adopted as the linear movement means 50 is fixed to the spindle housing 35 by the rotation of the ball screw 511 and the forward and reverse rotation by fixing the bracket 37 of the ball screw nut to the spindle housing 35 35 and the spindle 31 moving linearly together with the linear movement speed and the advancing / retracting direction of the spindle 31 are determined.

The present invention is driven by the first servo motor 13 controlled by the control unit 60 so that the RPM transmission path and the forward and reverse rotation strokes of the spindle 31 can be accurately set, The ball screw unit 51 controlled by the second servomotor 53 is employed as the linear moving means 50 of the spindle housing 35 so that the linear movement of the spindle 31 linearly moved together with the spindle housing 35 And precise control of the forward / backward switching stroke is possible.

In one embodiment according to the present invention,

The control unit 60 controls the first servo motor 13 to operate the spindle 31 with a drill / tap processing course 61 including a drilling mode, a tapping mode, and a reverse tapping mode, as shown in FIG. And the second servomotor 53 can be controlled.

As is known, the drilling mode is such that the spindle rotates at high speed and low speed and the tapping mode takes place at low speed rotation and relative high speed linear motion, one rotation per pitch of the machining tap, Is organically made up of a series of courses.

In case of tapping, the RPM and linear moving speed of the spindle are different in drilling and tapping depending on the material of the workpiece, the size of the tab, and the like.

For example, when the M5 tap is machined into an aluminum material workpiece, the control tool 60 can be applied to the drill / tapping course 61 of the present invention. After the rapid moving mode, the drilling mode is entered and the spindle 31 is rotated at a speed of about 3000 RPM and advances at a low speed. At this time, the complex tool 33 causes the drill area 331 to process the workpiece.

The first servo motor 13 and the second servo motor 53 are switched to the tapping mode by the control unit 60 at the time when the hole machining is completed in the workpiece by the drilling mode, The tab region 333 is linearly moved at a speed of 0.8 mm, which is the pitch of M5 per one revolution, and machining is performed.

Thereafter, when the tapping is completed, the first servo motor 13 and the second servo motor 53 are switched to the reverse tapping mode, so that the rotation direction and the linear movement direction are reversed so that the spindle 31 and the hybrid tool 33 is released from the workpiece, and then proceeds to the rapid reverse movement return mode and quickly returns to the original state.

This drilling and tapping process is repeatedly performed by a drill / tapping course 61 made by one reciprocating stroke of the composite tool 33, and the workpiece is supplied to the set position at a set time difference, Allows you to implement an automation system.

In one embodiment according to the present invention,

7, the controller 60 controls the first servo motor (not shown) to operate the spindle with a drill tap / chamfering course 62 including a drilling mode, a tapping mode, a chamfer mode, and a reverse tapping mode 13 and the second servomotor 53 can be controlled.

In addition to the drill / tap processing course 61, the drill / tap / chamfering course 62 is further provided with a chamfering mode for picking up the entrance of the tab. From the workpiece after the tapping mode, A free area rapid moving mode (not shown) for rapidly moving the free area 334 of the composite tool to be released is performed, and then the chamfering mode proceeds.

The chamfering mode may be the same RPM and linear moving speed as the drilling mode.

After the chamfering mode progresses, the rotation and the linear movement are reversed, and the process proceeds from the reverse free region rapid moving mode (not shown) to the reverse tapping mode to the rapid reverse movement return mode to perform the drilling and tapping as one of the composite tools 33 It is possible to perform the chamfering process, which greatly improves the productivity of the tap processing automation system.

In addition, since the workpiece does not move and one tool operates once, three processes necessary for tapping are performed, so that there is no fear that the concentric circles of the tabs are deviated, and the quality of the workpiece is remarkably improved.

As described above, in the tap processing automation system according to the present invention, the main pulley 11 involved in the rotation of the spindle 31 is driven by the first servo motor 13 and is involved in the linear movement of the spindle 31 The first servo motor 13 and the second servo motor 53 are controlled by the control unit to perform the shift, forward / reverse rotation, and forward / backward switching, while the ball screw unit 51 is operated by the second servo motor , A composite tool 33 having a drilled area, a tap area, and a chamfered area formed in a single body is mounted on the tool holder 32, whereby three-step tapping is completed by one operation of the complex tool without movement of the workpiece By implementing such an efficient automation system, productivity is dramatically improved and processing quality is significantly improved.

In addition, as one device, it is possible to replace three devices in the past, thereby remarkably reducing the investment cost of the production facility, the equipment and the installation space, and the possibility of industrial use is excellent.

1: tap processing automation system of the present invention
10: driving part 11: moving pulley 13: first motor (first servo motor)
20: follower portion 21: driven pulley 25: spline shaft
30: main shaft portion 31: spindle 32: tool holder
33: Composite tool 35: Spindle housing 37: Nut bracket of ball screw
40: casing 50: linear moving means 51: ball screw unit
511: ball screw 53: second motor (second servo motor) 60:

Claims (5)

A driving unit 10 including a main pulley 11 and a first motor 13 for rotating the main pulley 11 in normal and reverse directions;
A follower portion 20 including a driven pulley 21 connected to the driven pulley 11 by a belt 23 and a spline shaft 25 coupled to the driven pulley 21;
A spindle 31 which is rotatably and linearly movable with respect to the spline shaft 25 and a spindle 31 is inserted and the nut bracket 37 of the ball screw is mounted, A spindle portion (30) including a linearly moving spindle housing (35);
A casing 40 in which the spindle housing 35 is slidably installed;
A straight line including a ball screw unit 51 supported by the casing 40 and linearly moving the main shaft 30 and a second motor 53 for rotating the ball screw 511 of the ball screw unit in the forward and reverse directions, Moving means 50,
Wherein the first motor (13) and the second motor (53) are servo motors and are organically controlled by a separately provided controller (60). The method according to claim 1,
A tool holder 32 is provided on the spindle 31,
The tool mounted on the tool holder 32 is a composite tool 33 formed by sequentially forming at least two regions of a drill region 331, a tap region 333 and a chamfered region 335 from one end of the body Wherein the tapped machining system comprises: The method of claim 2,
Wherein the composite tool includes a drilled area (331), a tap area (333), a free area (334) for moving the work area out of the tap area, and a chamfered area (335). The method according to claim 1,
The controller 60 controls the first servo motor 13 and the second servo motor 53 to operate the spindle 31 with a drill / tap processing course 61 including a drilling mode → a tapping mode → a reverse tapping mode And a control unit for controlling the tapping process. The method according to claim 1,
The controller 60 controls the first and second servomotors 13 and 13 so as to operate the spindle with a drill tap and chamfering course 62 including a drilling mode, a tapping mode, a chamfering mode, and a reverse tapping mode. (53). ≪ / RTI >

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