KR20160135618A - Method for judging of machining error - Google Patents

Abstract

Cartridges to which the respective workpieces are respectively coupled are detachably coupled to each side in plural on each side of a polygonal-shaped jig assembly according to an embodiment of the present invention, and a plurality of workpieces are connected to the same tool A first cartridge of the first cartridge and a last cartridge processed last of the cartridges are separated from the jig assembly and placed in an error measuring device while the workpieces are coupled to each other ; And an error measuring device for measuring an error between the first cartridge and the last cartridge and determining a processing error of the first through last cartridges as normal if the measured values are within an error range, And judging that the workpieces of the first to last cartridges are to be reprocessed if the workpieces are out of the tolerance range.

Description

METHOD FOR JUDGING OF MACHINING ERROR [0002]

One embodiment of the present invention relates to a method of determining the error of each work piece when a plurality of work pieces are processed using the cartridge.

The main purpose of the conventional jig device is to securely fix the workpiece to control the position of the workpiece during machining and measurement, and to prevent movement. In addition, in the conventional jig device, the work jig fixes the workpiece in each process, and the measurement jig at the time of three-dimensional measurement fixes the measurement direction. In a jig device that performs each dedicated role, the machining jig device not only softens the tool approach posture according to the limit value of the Y-axis tilt angle of the 5-axis machining center, but also the approach or retraction direction of the tool Dimensional measuring jig allows a smooth setting to be made so that a specific part desired by the operator can be accurately and quickly measured, Thereby preventing the shaking of the workpiece and minimizing the error rate.

In such a conventional jig device, a small number of workpieces must be processed separately for each process, and each of the workpieces must be separately measured using a measuring jig, which increases the processing time. In addition, since the conventional jig takes a method of fixing the workpiece after it is inserted into the jig, there is often a problem of flatness after the workpiece is completed. In addition, since a large number of maximum instantaneous power is required to move the workpiece to be processed by the tool, power consumption is high.

Therefore, a more improved jig assembly capable of mounting and machining a plurality of workpieces at the same time, improving the degree of defects such as flatness, and reducing the maximum power consumption can be considered.

In addition, a method of determining the machining error of each workpiece more economically by constructing such a jig assembly can be considered.

It is an object of the present invention to provide a method for determining a machining error of a plurality of workpieces by a method different from the conventional method.

According to an aspect of the present invention, cartridges to which workpieces are respectively coupled are detachably coupled to respective surfaces of the cartridges on respective surfaces of a polyhedron-formed jig assembly according to an embodiment of the present invention, A method for determining a machining error of a workpiece after machining a workpiece by the same tool by a horizontal positional movement or a rotary movement is characterized in that the workpiece is held in a state in which the first cartridge processed first and the last processed last cartridge Separating the jig from the jig assembly and arranging the jig in the error measuring device; And an error measuring device for measuring an error between the first cartridge and the last cartridge and determining a processing error of the first through last cartridges as normal if the measured values are within an error range, And judging that the workpieces of the first to last cartridges are to be reprocessed if the workpieces are out of the tolerance range.

According to one example related to the present invention, it is possible to further include a giving step of giving order to the processed cartridges.

According to an embodiment of the present invention, in the determining step, when the workpiece of the original cartridge is within an error range or the workpiece of the last cartridge is out of an error range, any one of the n < th > Setting the n-1 < th > cartridge to the last cartridge, and re-executing the determination step.

According to an example of the present invention, the selection of the n-th cartridge in the setting step may be set differently according to the error value of the last workpiece.

According to an embodiment of the present invention, when the error of the last cartridge corresponds to one of the predetermined error range lists in the setting step, the predetermined cartridge can be set as the nth cartridge.

The process error determination method according to at least one embodiment of the present invention configured as described above requires no errors or errors in each of the workpieces, It is possible to judge the error and judge the error.

Further, steps such as movement, machining, and error measurement of the workpiece are performed while being coupled to the cartridge.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an example of a machining apparatus according to an embodiment of the present invention; Fig.
Figure 2 illustrates an example of processing using a jig assembly in accordance with one embodiment of the present invention.
3 is a conceptual view of a jig assembly according to an embodiment of the present invention;
Figure 4 shows one side of the jig assembly shown in Figure 3;
5A is a conceptual view of a cartridge according to an embodiment of the present invention.
FIG. 5B shows an inclined portion of the cartridge according to another embodiment of the present invention. FIG.
6 is a view showing an example in which a workpiece is mounted on the cartridge shown in Fig. 5A; Fig.
Figure 7 illustrates one side of a jig assembly in accordance with another embodiment of the present invention.
8 is a perspective view of a cartridge according to another embodiment of the present invention.
Fig. 9 is a rear view of Fig. 8; Fig.
Fig. 10 is a view showing a body to which the cartridge shown in Fig. 8 is mounted; Fig.
11 is a photograph of a jig assembly according to a comparative example.
12 is a photograph showing an example of measuring a machining error of a case using the jig assembly according to Fig.
13 is a conceptual diagram showing an example of measuring a machining error of a case using a jig assembly according to embodiments of the present invention.
14 is a flowchart showing a method of processing a case using a jig assembly according to an embodiment of the present invention.
15 is a conceptual view showing a cartridge according to a preferred embodiment of the present invention;
16 is a rear perspective view of the cartridge shown in Fig. 15;
Fig. 17 is a side view showing a state in which a workpiece is coupled to the cartridge shown in Fig. 15; Fig.
18 is a view showing an example in which a cartridge is coupled to a body constituting a jig assembly;
Fig. 19 is a conceptual diagram showing a modified example of the cartridge shown in Fig. 15. Fig.
20 is a flowchart showing a method of processing a workpiece using a cartridge according to a preferred embodiment of the present invention.
21 is a conceptual diagram showing an example of measuring a machining error of a workpiece when using a jig assembly according to embodiments of the present invention;
FIG. 22 is a flowchart showing a method of determining a machining error after machining according to a preferred embodiment of the present invention. FIG.

Hereinafter, a processing error determination method according to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

1 is a diagram showing an example of a machining apparatus 100 according to an embodiment of the present invention. The machining apparatus 100 may be, for example, a machining center. In addition, it can be a lathe, a milling machine, or a tapping machine.

When the machining apparatus 100 is embodied as a machining center, the machining apparatus 100 includes a drive motor (not shown), a main shaft 110, a bed 170, saddles 160, a table 150, a column 120 An automatic tool changer 140, an operating plate, a control unit, a servo mechanism 180, and the like. The bed 170 is capable of maintaining high rigidity, and the slide surface is constituted by a linear motion guide having an extremely low frictional resistance. Columns 120 are attached on the bed 170 and serve to support and guide the spindle head. Inside the spindle head 110, a spindle motor and a pulley are connected by a V-belt to rotate the main shaft. The main shaft hole is tapered so that when the tool is clamped, So that the centers of the two are exactly matched. A table 150 is disposed over the saddle 160 and the saddle 160 is driven by a ball screw disposed at the center of the guide surface above the bed 170. The transfer box is disposed on three surfaces of the front surface of the bed 170, the top surface of the column 120, and the right surface of the saddle 160. Each box is equipped with a traction AC servomotor to drive the ball screw. The operation plate is similar to an NC lathe, and is composed of a machine operation plate for manually operating the machine. The automatic tool changer (ATC, 140) is a device that automatically exchanges the tool fixed to the main spindle with the tool to be used for the next machining. The automatic tool changer 140 is of a different type (turret type, storage type, etc.) according to the size of the machine, and the number of tools that can be mounted is several to several tens. The tool call method is a random method in which arbitrary tools can be exchanged by calling with a number, and a sequential method in which the main spindle is arranged in the order of arrangement

When the size and shape of workpieces processed by a machining center or the like are varied, there is a problem in carrying and replacing the APC machine. In the case of machining one kind or several kinds of workpieces with one machine tool, It takes a lot of time to fix and position the workpiece and the tool each time it is replaced. Therefore, in order to shorten the stopping time of the machine, the standard type fixing jig may be attached directly to the table 150 of the machining apparatus 100, or the workpiece may be fixed to the jig assembly outside the machine, And is used by being attached to the table 150 of FIG. That is, the automatic thread changing device carries the entire jig assembly in which the workpiece is fixed, attaches it to the machine tool, and removes it.

The jig assembly described below may be coupled to any portion 190 of the processing apparatus 100. For example, the jig assembly is disposed between the table 150 and the main shaft 110, and the jig assembly can be rotated, moved up and down, or moved left and right by the automatic fluid exchange device.

2 is a view showing an example of processing using a jig assembly 200 according to an embodiment of the present invention. Referring to Fig. 2, the jig assembly 200 may be arranged such that a tool (the main shaft 110 includes a tool) is located on either side. The jig assembly 200 is coupled to a rotary shaft 190 that is rotatably formed. The rotary shaft 190 may rotate the jig assembly 200. In addition, the rotary shaft 190 may move the jig assembly 200 in the X-axis, Y-axis, and Z-axis directions.

As a result, the jig assembly 200 can be processed with the workpiece 240 coupled by the main shaft 110 to which the tool is coupled.

FIG. 3 is a conceptual diagram of a jig assembly 200 according to an embodiment of the present invention, and FIG. 4 is a view showing one side of the jig assembly 200 shown in FIG.

Referring to FIG. 3, the jig assembly 200 includes a body 210 and a cartridge 230. The body 210 is formed as a polyhedron. For example, the body 210 may have a triangular prism, a square prism, or a prismatic prism. Referring to FIG. 4, the body 210 may have a rectangular pillar shape.

3 to 4, the cartridges 230 may be coupled to at least two sides of the body 210, respectively. The cartridges 230 may be coupled to each side of the body 210.

As shown, the body 210 can be formed in a plurality of shapes. When a plurality of bodies 210 are formed, a coupling part 220 may be formed on one side of each body 210. Each of the bodies 210 may be formed integrally with the coupling portion 220. At this time, the rotation shaft 190 may be coupled to the coupling portion 220. Referring to FIG. 3, the bodies 210 are provided in pairs, and each of the bodies 210 may be disposed parallel to each other.

The cartridge 230 is formed to accommodate the workpiece 240. The cartridges 230 may be provided in plural, and the sides of the cartridges 230 may be disposed to face each other.

2 through 4, the cartridge 230 is detachably coupled to the body 210. The means for securing the cartridge 230 to the body 210 may be a fastening means such as a bolt or a hooking device for securing any portion of the cartridge 230 to the body 210 in the form of a hook . At this time, by controlling the engaging means or the engaging device, the cartridge 230 can be automatically attached and detached. That is, when the cartridge 230 is released from the position where the cartridge 230 faces the paper, the cartridge 230 can be separated from the body 210 by gravity.

In addition, the workpiece 240 may be detachably coupled to the cartridge 230. The means for securing the workpiece 240 to the cartridge 230 may be a fastening means such as a bolt or a hooking device for securing any part of the workpiece 240 to the cartridge 230 in the form of a hook . At this time, the workpiece 240 can be automatically attached and detached by controlling the fastening means and the fastening device. That is, when the engaging device is released at a position where the workpiece 240 faces the ground, the workpiece 240 can be separated from the cartridge 230 by gravity.

The cartridge 230 may be provided with a hole communicating with the intake motor. The intake motor is built in the machining apparatus 100, and communicates with the hole through the body 210. When the suction is performed through the suction motor, the inside of the hole becomes a state close to vacuum, and the workpiece 240 covering the hole is sucked. As a result, the workpiece 240 is brought into close contact with the cartridge 230.

5A is a conceptual view of the cartridge 230 according to an embodiment of the present invention.

The cartridges 230 may include a back portion 231, a limiting portion 232, and a receiving portion 233. The back surface portion 231 is formed flat as a portion where the cartridge 230 is in contact with the body 210. The limiting portion 232 is a portion that contacts the side surface of the workpiece 240 and has a shape corresponding to the workpiece 240. The accommodating portion 233 is a portion recessed from one surface so as to accommodate the workpiece 240, and has a shape corresponding to the shape of the abutting workpiece 240.

And may further include an inclined portion 234 extending obliquely from the limiting portion 232 to the back surface portion 231. At this time, the inclined portions 234 can be arranged to face each other.

5B is a view showing an inclined portion 234 of the cartridge 230 according to another embodiment of the present invention.

Referring to FIG. 5B, the cartridges 230 may include a back surface portion 231, a limiting portion 232, and a receiving portion 233. The back surface portion 231 is formed flat as a portion where the cartridge 230 is in contact with the body 210. The limiting portion 232 is a portion that contacts the side surface of the workpiece 240 and has a shape corresponding to the workpiece 240. The accommodating portion 233 is a portion recessed from one surface so as to accommodate the workpiece 240, and has a shape corresponding to the shape of the abutting workpiece 240.

And may further include an inclined portion 234 extending obliquely from the limiting portion 232 to the back surface portion 231. At this time, the inclined portions 234 can be arranged to face each other.

The protrusions 239 are formed on the inclined portions 234 of any one of the cartridges 230 arranged to face each other and the inclined portions 234 of the other cartridge 230 are provided with protrusions A corresponding groove 238 can be formed. When the protrusion 239 is inserted into the groove groove 238, sliding movement between the cartridges 230 can be prevented. With this configuration, even if the empty space is formed in the cartridge 230, the jig assembly 200 can be constructed only by the cartridge 230. [

Fig. 6 is a view showing an example in which the workpiece 240 is mounted on the cartridge 230 shown in Fig.

The workpiece 240 may be, for example, a metal case that forms the appearance of the mobile terminal. A hole 236 is formed in the receiving portion 233 of the cartridge 230. The hole 236 communicates with the intake motor. The intake motor is built in the machining apparatus 100, and communicates with the hole through the body 210. When the suction is performed through the suction motor, the inside of the hole 236 becomes close to vacuum, and the workpiece 240 covering the hole 236 is sucked. As a result, the workpiece 240 is brought into close contact with the cartridge 230.

As a result, the workpiece 240 can be detachably coupled to the cartridge 230. Alternatively, the means for securing the workpiece 240 to the cartridge 230 may be a fastening means such as a bolt, but a latching device for securing a portion of the workpiece 240 to the cartridge 230 in the form of a hook . At this time, the workpiece 240 can be automatically attached and detached by controlling the fastening means and the fastening device. That is, when the engaging device is released at a position where the workpiece 240 faces the ground, the workpiece 240 can be separated from the cartridge 230 by gravity.

The jig assembly 200 described above can mount a large amount of workpieces 240, and can continuously process a large amount of workpieces 240 using one tool.

For example, if the jig assembly 200 comprises two bodies 210, each body 210 has four mounting surfaces and eight workpieces 240 are disposed on each mounting surface, 64 pieces of workpiece 240 can be continuously machined without replacing the tool.

7 is a side view of a jig assembly in accordance with another embodiment of the present invention.

Referring to FIG. 7, the body 310 may have a triangular prism shape.

The cartridges 330 may be coupled to at least two sides of the body 310, respectively. Cartridges 330 may be coupled to each side of body 310.

As described above, the body 310 can be formed in plural. When a plurality of bodies 310 are formed, a coupling portion may be formed on one side of each body 310. Each of the bodies 310 may be formed integrally with the coupling portion. At this time, the rotary shaft 190 may be coupled to the engaging portion. In addition, the bodies 310 are provided in a pair, and the bodies 310 may be arranged in parallel with each other.

Cartridge 330 is formed to accommodate workpiece 240. The cartridges 330 may be provided in plural, and the sides of the respective cartridges 330 may be disposed to face each other.

Referring again to FIG. 7, the cartridge 330 is detachably coupled to the body 310. The means for securing the cartridge 330 to the body 310 may be a fastening means such as a bolt or may be a latching device for securing any part of the cartridge 330 to the body 310 in the form of a hook . At this time, by controlling the engaging means or the engaging device, the cartridge 330 can be automatically attached and detached. That is, when the cartridge 330 releases the latching device at a position facing the paper, the cartridge 330 can be separated from the body 310 by gravity.

The workpiece 240 may be detachably coupled to the cartridge 330. [ The means for securing the workpiece 240 to the cartridge 330 may be a fastening means such as a bolt or a hooking device for securing a portion of the workpiece 240 to the cartridge 330 in the form of a hook . At this time, the workpiece 240 can be automatically attached and detached by controlling the fastening means and the fastening device. That is, when the engaging device is released at a position where the workpiece 240 faces the ground, the workpiece 240 can be separated from the cartridge 330 by gravity. As described above, the cartridge 330 may be provided with a hole communicating with the intake motor. The intake motor is built in the interior of the processing apparatus 100, and communicates with the hole through the body 310. When the suction is performed through the suction motor, the inside of the hole becomes a state close to vacuum, and the workpiece 240 covering the hole is sucked. As a result, the workpiece 240 is brought into close contact with the cartridge 330.

FIG. 8 is a perspective view showing a cartridge according to another embodiment of the present invention, FIG. 9 is a rear view of FIG. 8, and FIG. 10 is a view showing a body on which the cartridge shown in FIG. 8 is mounted.

8, protrusions 437 and 438, which are formed to correspond to the recessed portion (or the hole of the workpiece) of the workpiece 240 so that the workpiece 240 is coupled to one surface of the cartridge 430, Can be formed. The protrusions 437 and 438 may be coupled to the upper and lower portions of the workpiece 240, respectively. The projections 437 and 438 may be formed in a plurality corresponding to the number of the workpieces 240 to be joined. The protrusions 437 and 438 can be formed in corresponding numbers to simultaneously process a total of eight workpieces 240. Reference numeral 434, which is not shown in FIG. 8, is an inclined portion.

Referring to FIGS. 9 and 10, a plurality of guide grooves 436 are formed on the rear surface of the cartridge 430, and a plurality of fixing protrusions 411 may be formed on one surface of the body 410. FIG. A suction groove 435 is formed on the rear surface of the cartridge 430 and an air inlet 412 may be formed on one surface of the body 410. [ The intake port 412 in the processing apparatus 100 communicates with the intake port 412. When the intake motor is operated, the intake port 412 pulls the cartridge 430 to close the cartridge 430 to the body 410. At this time, the fixing protrusions 411 of the body 410 are formed on the outside of the suction groove 435 to guide the position of the cartridge 430. That is, the fixing protrusion 411 is inserted into the guide groove 436 to guide the position of the cartridge 430.

Here, the bodies 410 are provided in a pair, and each of the bodies 410 may be disposed parallel to each other. The rotation shaft 190 formed on one side of the body 410 may be coupled to the coupling portion 220. The rotating shaft 190 is formed so as to rotate relative to the engaging portion. And, the engaging portion can be fixed to the table of the machining apparatus. The table moves relative to the processing apparatus and can move in at least one of the three axial directions.

A plurality of guide protrusions may be formed on the back surface of the cartridge 430 and a plurality of fixing grooves may be formed on one surface of the body 410. [

Fig. 11 is a photograph of a jig assembly according to a comparative example, and Fig. 12 is a photograph showing an example of measuring a processing error of a case when the jig assembly according to Fig. 11 is used.

The jig assembly according to the comparative example is fixed on the table, and four cases are arranged on the upper surface of the jig assembly. The tool is used to machine the case. In this case, the case is a metal case, and holes for inserting a charging jack, a microphone, an ear jack, and the like of the metal case may be formed using a tool, or holes may be formed for coupling the antenna.

When machining is finished, the tolerance caused by machining is measured. At this time, the case is separated from the jig assembly, and the error of the case is measured separately. When an error occurs, it is re-coupled to the jig assembly.

13 is a conceptual diagram showing an example of measuring a machining error of a case using a jig assembly according to embodiments of the present invention.

Using a jig assembly according to embodiments of the present invention makes it easier to measure machining errors. That is, the processed case is not separated from the cartridge 430, the cartridge 430 and the case are placed together in the error measuring device, and the measuring error is measured using the measuring device 510. A guide protrusion 521 is formed on one surface of the error measuring device fixing part 520 and a guide protrusion 521 is inserted into a guide groove 436 formed on the back surface of the cartridge 430. [ Alternatively, guide grooves may be formed on one surface of the error measuring device, guide protrusions may be formed on the back surface of the cartridge, and guide protrusions may be inserted into the guide grooves.

More specifically, in the case of using the jig assembly according to the embodiments of the present invention, after the plurality of cases arranged on one side of the cartridge 430 are processed, when the errors are measured, Move to the measuring device. Since the position is fixed by the guide projection formed on the error measuring device, the cases on the cartridge 430 can be measured more easily.

On the contrary, in the case of the comparative example, since the jig assembly is fixed on the table, the cases must be separated from the jig assembly. At this time, if a force exceeding a predetermined level is applied, there may be a problem in the flatness of the case. Also, when the case is moved to the error measuring device, the case may be inadvertently damaged. If the case is manually moved, the workload increases and the production cost increases. Further, when an error occurs, a separate operation for fixing the workpiece to the jig assembly for reworking is required.

Compared with the comparative example, the superiority of the present invention is highlighted. In the comparative example, only about four cases were machined simultaneously, and each was separated from the jig assembly, and the error was measured and reworked. However, according to the present invention, a total of 64 cases can be machined at the same time, and after the machining is completed, the cartridges 430 can be moved to the error measuring device while eight cases are arranged, . Further, the cases with errors may be transferred to the processing apparatus while being coupled to the cartridge 430, and the case may be reprocessed.

The metal case of the mobile terminal can be more efficiently processed by using the jig assembly 200 according to the present invention. Hereinafter, a description will be given.

14 is a view showing a method of processing a case using a jig assembly 200 according to an embodiment of the present invention.

Referring to Fig. 14, a method of processing a case using the jig assembly 200 includes a fixing step, a joining step, a machining step, and a rotating step.

In the fixing step, the cases, which are the workpiece 240, are fixed to the cartridges 230. At this time, the fixing method is not limited to any one method, and various methods can be used. For example, the case may be attached to the cartridge 230 by a magnetic force. As another example, a plurality of protrusions may be formed in the receiving portion 233 of the cartridge 230, and holes or grooves may be formed in the case corresponding to the protrusions. When the protrusions and the holes or the grooves are coupled to each other, the case can be fixed to the cartridge 230. Conversely, protrusions may be formed in the case and grooves or holes may be formed in the accommodating portion 233. Further, the case can be fixed to the cartridge 230 by a fastening means such as a screw. Alternatively, the case may be adsorbed to the cartridge 230 by vacuum suction. One case may be fixed to one cartridge 230, but a plurality of cases may be fixed to one cartridge 230.

In the coupling step, the cartridge 230 is coupled to the jig assembly 200. The jig assembly 200 has a plurality of mounting surfaces. The jig assembly 200 is made of a polyhedron. The jig assembly 200 may have a body 210 formed of a triangular, quadrangular, or pentagonal column. Various methods can be used for coupling the cartridge 230 and the jig assembly 200. For example, the cartridge 230 may be attached to the jig assembly 200 by a magnetic force. As another example, a plurality of protrusions may be formed in the body 210 of the jig assembly 200, and holes or grooves may be formed in the cartridge 230 corresponding to the protrusions. When the protrusion and the hole or the groove are coupled to each other, the cartridge 230 can be fixed to the body 210 of the jig assembly 200. Conversely, protrusions may be formed on the cartridge 230 and grooves or holes may be formed on one side of the body 210. [ Further, the cartridge 230 can be fixed to the body 210 by a fastening means such as a screw. Alternatively, the cartridge 230 may be adsorbed to the body 210 by vacuum suction. One cartridge 230 may be coupled to one mounting surface of the body 210, but a plurality of cartridges 230 may be fixed to one mounting surface.

In the machining step, the case disposed on any one of the mounting surfaces can be machined by using the tool. When the cases are arranged in plural, the jig assembly 200 can be moved in at least one of the front, rear, left, and right directions to process each case.

Then, the jig assembly 200 is rotated in the rotating step, and the case arranged on the other mounting surface can be processed. For example, if the jig assembly 200 is composed of two bodies 210, each body 210 has four mounting surfaces, and eight cases are arranged on the respective mounting surfaces, a total of 64 cases Can be continuously machined without tool change.

Thus, a large amount of workpiece 240 can be machined in a shorter time, and power consumption due to replacement of tool and replacement of workpiece 240 can be reduced. Also, since a large amount of products are processed substantially simultaneously under the same process conditions, there is almost no difference in quality of the workpieces 240 due to changes in process conditions, and the dimension management can be performed within a certain range.

As described above, by using the machining method according to the embodiment of the present invention, a plurality of workpieces 240 can be machined without replacing the machining tool. This reduces production costs and allows more workpieces 240 to be machined in a shorter time.

FIG. 15 is a conceptual view showing a cartridge according to a preferred embodiment of the present invention, FIG. 16 is a rear perspective view of the cartridge shown in FIG. 15, And Fig. 18 is a view showing an example in which the cartridge is coupled to the body constituting the jig assembly.

Referring to Figs. 15 and 16, the cartridges 630 may include a back surface 631, a front surface 632, and a protrusion 637a. The back surface 631 is formed flat as a portion where the cartridge 630 is in contact with the body 410. The front surface 632 may be in contact with a part of the back surface of the workpiece 240 and may have a shape corresponding to the workpiece 240. The protrusion 637a protrudes from the front surface so that the workpiece 240 can be fixed, and may have a shape corresponding to the shape of the workpiece 240 contacting.

And may further include an inclined portion 634 extending obliquely from the front surface 632 to the back surface 631. At this time, the slopes 634 of the respective cartridges can be arranged to face each other.

The workpiece 240 may be, for example, a metal case that forms the appearance of the mobile terminal. In order to fix the workpiece 240, a fixing means 639 may be formed on the front surface of the cartridge 630. [

A fixing groove 632a may be formed on the front surface of the cartridge 630 so that the fixing means 639 is engaged. The fixing means 639 may include a first body 639a and a second body 639b. The second body 639b may be detachably coupled to the first body 639a. Alternatively, the first body 639a and the second body 639b may be integrally formed. At least a part of the first body 639a may be inserted into the fixing groove 632a formed in the front surface of the cartridge 630. [ The first body 639a may have threads formed along the outer circumferential surface thereof, and the threads may be supported by frictional force when the first body 639a is inserted into the fixing groove 632a. The second body 639b is formed so as to cover at least a part of the workpiece 240. For this purpose, it extends in a direction away from the central axis of the first body 639a. The second body 639b may have a shape corresponding to the shape of the workpiece 240. A portion of the second body 639b contacting the workpiece 240 may be formed in this shape.

Referring to FIG. 17, at least two workpieces 240 may be coupled to the cartridge 630. The second body 639b, which is the fixing means 639, may be formed to cover the edges of the adjacent workpieces 240. [ For example, when the first workpiece and the second workpiece are engaged with the cartridge 630, one side of the second body 639b is in contact with the first workpiece, and the other side of the second body 639b is in contact with the second workpiece can do. As a result, a plurality of workpieces can be fixed while occupying less space. Further, if a plurality of workpieces are fixed by using one fixing means 639, the working time can be reduced and the workpiece can be processed more economically.

Referring to FIGS. 16 and 18, a plurality of guide grooves 636 are formed on the rear surface of the cartridge 630, and a plurality of fixing protrusions 411 may be formed on one surface of the body 410. FIG. A suction groove 635 is formed on the rear surface of the cartridge 630 and an inlet port 412 may be formed on one surface of the body 410. [ The intake port 412 is connected to the intake port 412 of the interior of the processing apparatus 100 and the intake port 412 is pulled by the intake port 412 so that the cartridge 630 is brought into close contact with the body 410. At this time, the fixing protrusions 411 of the body 410 are formed on the outer periphery of the body 410 to guide the position of the cartridge 630. That is, the fixing protrusion 411 is inserted into the guide groove 636 to guide the position of the cartridge 630.

Here, the bodies 410 are provided in a pair, and each of the bodies 410 may be disposed parallel to each other. The rotation shaft 190 formed on one side of the body 410 may be coupled to the coupling portion 620. The rotating shaft 190 is formed so as to rotate relative to the engaging portion. And, the engaging portion can be fixed to the table of the machining apparatus. The table moves relative to the processing apparatus and can move in at least one of the three axial directions.

A plurality of guide protrusions may be formed on the back surface of the cartridge 630 and a plurality of fixing grooves may be formed on one surface of the body 410. [

Fig. 19 is a conceptual diagram showing a modified example of the cartridge shown in Fig. 15. Fig.

Referring to FIG. 19, the cartridge 630 may have a receiving portion 637b instead of a protrusion on the front surface thereof. As a result, the workpiece 240 can be seated in the receiving portion 637b. At this time, a hole may be formed in the receiving portion 637b of the cartridge 630. [ The hole communicates with the intake motor. The intake motor is built in the interior of the processing apparatus 100 and communicates with the hole through the body 410. When the suction is performed through the suction motor, the inside of the hole becomes a state close to vacuum, and the workpiece 240 covering the hole is sucked. As a result, the workpiece 240 is brought into close contact with the cartridge 630.

20 is a flowchart showing a method of processing a workpiece using a cartridge according to a preferred embodiment of the present invention.

The greatest feature of the processing method using the cartridge according to the embodiment of the present invention is that the workpiece to be processed is processed from the initial arrival to the cartridge and remains coupled to the cartridge until the error is measured. However, it is not excluded from the scope of the right to cancel the union of the cartridge and the workpiece for a more suitable machining in at least some steps.

Referring to FIG. 20, a fixing step is performed first. In the fixing step, each cartridge is given a serial number, and the workpiece is fixed to the cartridge. For example, when a total of thirty-two cartridges are assembled into a jig assembly, the cartridges to be processed first are numbered 1, and the cartridges are numbered to be numbered 32 in the order in which they are processed. When the cartridge according to the present invention is formed so as to correspond to the normal shape of the workpiece to be processed, if the workpiece is normally coupled to the cartridge, the dimensional error of the workpiece can be firstly determined before the machining. For example, when a defect occurs in a workpiece, it is possible to confirm whether or not the workpiece is defective by merely attaching the workpiece to the cartridge. If a shape error occurs in the workpiece, it may not fit into the protrusion of the cartridge or may not be inserted into the receiving portion of the cartridge.

Then, a placement step is performed. In the placement step, the numbered cartridges are arranged on each side of the body constituting the jig assembly so that the cartridges are sequentially processed according to the number. When the cartridges are normally disposed, a processing step of sequentially processing the workpieces is performed according to the number. The detailed processing method is as described with reference to Fig. When the machining is completed, the machining error of the workpieces is sequentially determined according to the number.

As described above, according to the present invention, movement, machining, and error determination can be performed while the workpieces are coupled to the cartridge from the fixing step to the judging step.

21 is a conceptual diagram showing an example of measuring a machining error of a workpiece 240 when using a jig assembly according to embodiments of the present invention.

The steps of measuring the error as shown in FIG. 21 can also be performed while the workpiece 240 is coupled to the cartridge 630. Using a jig assembly according to embodiments of the present invention makes it easier to measure machining errors. That is, the processed case is not separated from the cartridge 630, the cartridge 630 and the case are placed together in the error measuring device, and the measuring error is measured using the measuring device 510. A guide protrusion 521 is formed on one surface of the error measuring device fixing part 520 and a guide protrusion 521 is inserted into a guide groove 636 formed on the back surface of the cartridge 630. [ Alternatively, guide grooves may be formed on one surface of the error measuring device, guide protrusions may be formed on the back surface of the cartridge 630, and guide protrusions may be inserted into the guide grooves.

More specifically, when using a jig assembly according to embodiments of the present invention, after machining a plurality of cases disposed on one side of the cartridge 630, when measuring errors, the cases are placed in the cartridge 630, Move to the measuring device. Since the position is fixed by the guide projection formed on the error measuring device, the cases on the cartridge 630 can be measured more easily.

As shown in FIG. 21, when the laser sensor 510 irradiates the laser in the Y-axis direction or the -Y-axis direction, the Z-direction error of the workpiece 240 can be measured more easily.

FIG. 22 is a flowchart showing a method of determining machining error after machining according to a preferred embodiment of the present invention.

In the machining method according to the embodiment of the present invention, since machining of a plurality of workpieces is performed by the same tool, errors are less likely to occur. Even if an error occurs, it is not necessary to check or judge all the errors of the respective workpieces, and only the errors of the first and last workpieces can be inspected or judged. For example, if an error occurs in the first workpiece, all errors will occur to the last workpiece. This feature makes it easy to check or judge errors. Due to this characteristic, the following errors can be examined or judged.

Referring to FIG. 22, the post-machining machining error determination method includes a placement step and a determination step. In the placement step, the first cartridge processed first and the last cartridge processed last of the cartridges are separated from the jig assembly and are placed in the error measuring device while the workpieces are coupled to the cartridge. When the error of the workpieces of the first cartridge and the last cartridge is measured using the error measuring device, if the measured values are within the error range, the processing errors of the first to last cartridges are judged as normal, If the range is out of range, the workpieces of the first to last cartridges are judged to be reprocessed.

Determining the nth cartridge of any one of the first to last cartridges as the first cartridge when the workpiece of the first cartridge is within an error range but the workpiece of the last cartridge is out of the error range, And a setting step of re-executing the determination step. For example, if a total of 32 cartridges are processed, the first cartridge, which is the first cartridge, is normal, and the last cartridge, 32, is abnormal, arbitrarily set 17 as the initial cartridge, 16 as the last cartridge, Determine the machining error of the workpiece. At this time, the cartridges from No. 17 to No. 32 perform rework. When the machining is completed, the judgment step is re-executed. If it is determined that the machining is abnormal, the setting step and the judgment step are performed again until it is judged as normal.

It is possible to more effectively select an arbitrary cartridge according to the degree of error. That is, it is possible to set the cartridge in which the problem of machining error is caused according to the experience in which the machining error has occurred. For example, if a machining error of the first cartridge occurred in the past, or if a machining error of 10 was generated in the last cartridge, if an error occurred from the fifth cartridge, it is recorded. If a machining error of 10 occurs, If an error has occurred from the 13th cartridge when a machining error of 6 has occurred in the last cartridge in the past, it is recorded. If a machining error of 6 occurs, the 13th cartridge is set to be reworked. This makes it possible to check or judge errors in workpieces faster.

In other words, the selection of the nth cartridge in the setting step can be set differently according to the error value of the last workpiece.

If the error of the last cartridge corresponds to one of the predetermined error range lists in the setting step, the predetermined cartridge can be set as the nth cartridge.

As described above, according to the present invention, even if an error occurs, it is not necessary to check or determine all the errors of the respective workpieces, and only the errors of the first and last workpieces can be examined or judged to determine the error.

On the other hand, the imparting step may be performed in a stage prior to the arranging step, and the order is given to the processed cartridges in the delivering step. For example, cartridges can be serialized.

The method of determining a machining error as described above is not limited to the configuration and method of the embodiments described above, but the embodiments may be modified such that all or some of the embodiments are selectively combined .

Claims (5)

Cartridges to which the workpieces are respectively coupled are detachably coupled to respective surfaces of the cartridges on respective sides of the polyhedron-formed jig assembly, and a plurality of workpieces are processed by the same tool by horizontal positioning or rotational movement, A method for determining a machining error,
A disposing step of disposing, in the error measuring apparatus, the first processed cartridge and the last processed cartridge out of the cartridges from the jig assembly while the workpieces are combined; And
Wherein when an error between the first cartridge and the last cartridge is measured using the error measuring device and the measured values are within an error range, the processing error of the first through last cartridges is determined to be normal, And judging that the workpieces of the first to last cartridges are to be reprocessed if the error range is outside the error range. The method according to claim 1,
Further comprising the step of giving an order to the processed cartridges. 3. The method of claim 2,
In the determination step,
And sets the nth cartridge of any one of the first to last cartridges as the first cartridge when the workpiece of the first cartridge is within the error range and the workpiece of the last cartridge is out of the error range, Further comprising a setting step of setting the cartridge to the last cartridge and re-executing the determination step. The method of claim 3,
Wherein the selection of the nth cartridge in the setting step is set differently according to an error value of the last workpiece. 5. The method of claim 4,
If the error of the last cartridge corresponds to one of the preset error range lists in the setting step, sets the predetermined cartridge to the nth cartridge.

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