KR20030044724A - How to Process Entangled Wires for Retractable Antennas - Google Patents

Abstract

PURPOSE: A method for manufacturing an NT wire of a retractable antenna is provided to prevent the generation of a burr by pulling and cutting a wire being feed continuously in a heating state. CONSTITUTION: A wire is moved as much as a value of a stepping motor by rotating upper and lower rollers through the driving of the stepping motor(S11). In holding both ends of the wire, a voltage and a current are applied to the wire and then the wire is heated to be pulled and cut(S12). The cut wire is inverted as 180 degree by a transferring unit and inserted into a collet of an index table(S13). A pusher forwards to feed the wire to the collet(S14). With supporting ends of the wire that is exposed to an outside of the collet, a locking-hole is formed by a grinding wheel(S15). The grinding wheel is dressed by a grind stone(S16). The wire having the locking-hole is separated from the collet to be unloaded to an unloading position(S17). The unloaded wire is arranged(S18).

Description

Method for processing the wire of retractable antenna

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable antenna that plays a role of transmitting and receiving a wireless terminal, and more particularly, in a state where an ent wire (shape suppression alloy) constituting the retractable antenna is made of synthetic resin and injection molding. The present invention relates to an ent wire processing method of a retractable antenna which automatically cuts to a predetermined length while continuously supplying ent wires so as not to be separated from the injection part of the top portion, and automatically forms a locking groove at the cut end.

1 is a vertical cross-sectional view of a conventional retractable antenna, and FIG. 2 is a perspective view showing a conventional retractable wire. The retractable antenna 1, which serves to transmit and receive a signal in a wireless terminal, is formed of an metallic material. It consists of a wire 2, a tube 3 surrounding the ante wire, and an injection-molded material 4 injected with the ent wire 2 wrapped with the tube inserted.

Therefore, the retractable antenna 1 is repeatedly drawn out while the retractable antenna 1 is mounted on the wireless terminal (not shown), and even though a certain tensile strength is applied to their connection portions, they are separated from each other. The end portion of the ante wire 2 is punched out so as to form an extension part 5 serving as a locking step as shown in FIG. 2.

FIG. 3 is a process chart for explaining a conventional ante wire processing method, by transferring a ent wire (hereinafter referred to as "wire") wound on a bobbin by a feeding unit by a predetermined length by a punch or cutter. The wire is cut (S1).

When the wire is cut to a predetermined length in this manner, a burr is generated on the cut surface of the wire, and thus the wire cannot be inserted into the tube, thereby removing the burr generated on the cut surface through a grinding process.

After removing the burrs generated on the cut surface of the wire, the wire is horizontally transferred by the transfer unit, and the punching operation is performed while clamping one end to form an extension at one end. (S3)

After processing the wire through a series of processes as described above, the finished product is taken out of the device by the transfer means is completed, the processing of the ante wire is completed (S4).

After the finished product is taken out through the above process, the finished product is aligned neatly by hand so that the expansion part is located in the same direction for the insertion process of the tube.

However, the conventional ante wire processing method has a number of problems as follows.

First, since the wire is cut by a punch or a cutter, a burr is generated on the cut surface, and thus, the wire may be inserted into the tube in a later step only after a separate grinding process, thereby further decreasing productivity.

Secondly, since the wire is cut to a predetermined length by the punch to form an extension portion, it takes 4 seconds or more to produce one ante wire because it has to wait until the extension portion is formed and then transferred.

Third, the tensile strength with the injection molding is reduced because one end of the wire is pushed by the punch to form an expansion part. In particular, in the wet season, the tensile strength is remarkably dropped to about 3 to 6 Kg / f, which causes a claim from the user. It became.

Fourth, since the finished product formed with the extension part is randomly taken out in the process of being taken out to the outside of the device, there is no directivity so that it can be inserted in the same direction only when it is aligned.

The present invention has been made to solve such a conventional problem, by pulling and cutting the wire continuously supplied in the heat generated state by the application of power without using a punch or a cutter so that no burr on the cutting surface There is a purpose.

Another object of the present invention is to be able to continuously process a wire cut to a predetermined length by using an index table.

Still another object of the present invention is to form at least one annular locking groove at one end of the wire so as to increase the tensile strength at the connection portion with the injection molded product in the state of injection completion.

According to an aspect of the present invention for achieving the above object, as a pair of rollers rotate by driving of the stepping motor to transfer the wire wound on the bobbin by the set value of the stepping motor in the state of being fitted in the groove formed in the roller. And generating heat by applying a weak voltage and a strong current to the wire while holding both ends of the wire transferred by the driving of the stepping motor, and pulling it to cut it while reducing the wire diameter of the heating portion; Inverting the wire cut to a length of 180 degrees while the conveying means is holding the wire is inserted into any one of the collet in the index table with a plurality of collets, and the wire is sequentially inserted into the collet of the index table When you reach a predetermined position by rotating one step, one end of the wire exposed to the outside of the collet is removed. Forming a locking groove with a polishing wheel while rotating the collet in a supported state; and when the wire having the locking groove reaches the unloading position by the continuous rotation of the index table, the extraction finger holds the wire from the collet Unloading at the unloading position, and if the wire is processed locking the groove is placed on the take-out table located in the unloading position step of transporting by one step by the take-out plate to take out by loading step Provided is a method for processing an entwined wire in a retractable antenna.

1 is a longitudinal cross-sectional view of a conventional retractable antenna

2 is a perspective view showing a conventional retractable wire

3 is a process chart for explaining a conventional ante wire processing method

4 is a perspective view of an ante wire processed by the present invention.

5 is a process chart for explaining the anti-wire processing method of the present invention.

Figure 6 is a perspective view of the ante wire processing machine to which the present invention is applied

FIG. 7 is a front view of FIG. 6

8 is a plan view of FIG.

9 is a side view of FIG. 6

10 is a longitudinal sectional view showing a state in which the abrasive wheel is worn.

Explanation of symbols for main parts in the drawings

2: ante wire 6: Locking groove

8, 16: upper and lower roller 10: fixed block

11: movable block 12, 13, 43: finger

14: bobbin 15: wire

21: transfer means 24: index table

25: collet 26: grinding wheel

28, 34: pusher 38: abrasive stone

44: take out table 46: take out plate

48: loading box

Hereinafter, the present invention will be described in more detail with reference to FIGS. 5 to 10 as an embodiment.

5 is a process chart for explaining the ante-wire processing method of the present invention, Figure 6 is a perspective view showing an ante-wire processing machine to which the present invention is applied, Figure 7 is a front view of Figure 6, the present invention is filed in advance by the applicant An object of the present invention is to provide a method for processing an ent wire of a retractable antenna capable of mass-producing an ent wire having a structure such as 4.

That is, the upper roller 8 is raised while compressing the spring 9 by the rotation of the handle 7, and the fixed block 10 and the fingers 12 and 13 of the movable block 11 are rotated upwards. The wire 15 wound on the bobbin 14 to pass the wire 15 between the upper and lower rollers 8 and 16 and at the same time, the wire passing groove formed in the fixed block 10 and the movable block 11. When the handle 7 rotated in the state of passing the wire 15 to the initial state, the upper roller 8 is lowered by the restoring force of the spring 9 so that the wire 15 is upper and lower rollers 8. It is located on any one wire passing groove formed in 16.

In this state, when the power is applied to the stepping motor 17 and the stepping motor is driven by the set value to rotate the lower roller 16, the wire 15 located between the upper rollers 8 installed to be idle. Is transported in the direction of the arrow of FIG. 7 by a predetermined length (S11).

After the wire is transported by the set length by the above operation, the driving of the stepping motor 17 is temporarily stopped and at the same time, the fingers 12 and 13 positioned at the top dead center are driven by the cylinders 18 and 19. The lowering and the conveyed wire 15 is clamped.

After that, a weak voltage is applied to the fixed block 10 and the movable block 11 and a strong current flows, so that the wire 15 located between the fixed block 10 and the movable block 11 is heated to a high temperature. At this point, the movable block 11 is moved away from the stationary block 10 by the driving of another cylinder 20, so that the heat generating portion is increased.

Accordingly, since the cross-sectional area of the heat generating portion is reduced, the portion held by the fixed block 10 is cut. At this time, the cutting portion fixed to the movable block 11 has a tapered shape. In the process, it is possible to easily insert the wire into the tube (S12).

In this way, after the wire is cut to a predetermined length by heat generated by electricity without using a punch or a cutter, the fingers 12 of the fixed block 10 and the movable block 11 are restarted by the cylinders 18 and 19. Since the 13 releases the clamping state of the wire 15, the finger 22 of the transfer means 21 holds the cut wire 15 while being held in the fixed block 10, and then the rotary cylinder 23. The wire 15 is inserted into any one of the collets 25 installed in the index table 24 by horizontally conveying them in a state of being inverted by 180 ° by driving of ().

As described above, the wire 15 wound on the bobbin 14 is conveyed by one transfer to the cutting unit side by the transfer unit.

The length of the wire 15 held by the finger 22 of the transfer means 21 and inserted into the collet 25 of the index table 24 becomes the maximum value, and the predetermined length is drawn out to the opposite side of the wire insertion direction. In this case, there is no problem in the machining of the locking groove 6 by the polishing wheel 26 in a later step.

However, when the wire 15 is smaller than the set maximum value, even if the finger 22 of the conveying means 21 inserts the wire 15 into the collet 25 of the index table 24, the end of the wire is opposite to the insertion direction of the wire. Since the locking groove 6 cannot be formed at one end of the wire 15 in a later step (locking groove forming step), the index table 24 is locked in the process of rotating one step. Prior to the groove forming process, the wire 15 should be pushed further by a certain amount toward the wire insertion direction.

That is, when the index table 24 rotates by one step while the wire 15 is inserted into the collet 25 of the index table 24 by the conveying means 21, the pusher 28 is driven by driving the cylinder 27. ) Moves by the set length to push the wire 15 inserted into the collet 25, so that the end of the wire 15 accommodated in the collet 25 is drawn out of the collet 25. S14)

Since the feed amount of the pusher 28 may change the position of the slider 29 by the rotation of the adjustment knob 30 screwed with the slider 29, even if a cylinder 27 having a constant stroke is used, The moving position can be changed.

Therefore, whenever the length of the wire 15 becomes smaller than the maximum value, the pusher 28 always pushes the wire 15 to the collet 25 by varying the position of the slider 29 by rotating the adjusting knob 30. Can be inserted into

When the wire 15 cut into the collet 25 in a predetermined length is sequentially inserted in the above-described operation, and the wire 15 reaches the locking groove forming position with a predetermined length exposed to the opposite side of the insertion direction, the collet 25 Since the rubber ring 31 fitted at one end of the wire 25 is connected to the rubber roller 32 which has been rotated by the driving means (not shown), the collet 25 holding the wire 15 rotates at high speed. Done.

In this state, when the pusher 34 moves forward by the driving of the cylinder 33, the pusher 34 supports the end of the wire 15 inserted in the cantilever shape into the collet 25.

This is a phenomenon in which the grinding wheel 26 is damaged while preventing the occurrence of defects due to deformation of the wire 15 when machining the locking groove 6 at the end of the wire 15 by the grinding wheel 26. To prevent this in advance.

After the pusher 34 supports one end of the wire 15 exposed to the outside of the collet 25, the slider 36 moves toward the index table 24 by the driving of the motor 35 so that the motor 37 As a result, the polishing wheel 26 rotating at a high speed forms the locking groove 6 at one end of the wire 15. (S15)

In an embodiment of the present invention, two locking grooves 6 are formed at the end of the wire 15 by mounting two polishing wheels 26 on the motor shaft, but polishing is performed according to the width and depth of the locking groove 6. The number of wheels 26 can be appropriately selected.

If the abrasive wheel 26 is worn as shown in FIG. 10 by continuous use of the abrasive wheel 26, it is impossible to form the locking groove 6 in a right angle state, and thus the tensile strength of the connection part is dropped after completion of the injection. The wheel should be dressed.

Accordingly, when the dressing time of the polishing wheel 26 is reached, the slider 39 to which the abrasive stone 38 is fixed is temporarily driven by driving the cylinder (not shown) in the state in which the sequential transfer of the wire 15 is temporarily stopped. As it moves forward, the polishing wheel 26 is dressed in a state indicated by a dashed line in FIG. 10, in which the transfer of the slider 39 is supported by the rod 40a of the hydro speed regulator 40 supported by the support piece 41. It is made in a state that is very stable.

After the dressing operation of the polishing wheel 26 by the abrasive stone 38 is performed in this way, the polishing point of the polishing wheel 26 according to the transfer of the slider 39 is reduced by the amount of dressing, so that the depth of the locking groove 6 is reduced. Since the stepping motor 35 recognizes the set value, the result of the lowering is compensated by the amount of the dressing of the polishing wheel 26 by the amount of the feed of the slider 39 (S16).

The setting value of the stepping motor 35 can be calculated because the dressing timing and amount of the polishing wheel 26 are determined at the time of designing the program.

After processing the at least one locking groove 6 at the end of the wire 15 inserted into the collet 25 of the index table 24, the grinding wheel 26 and the pusher 34 is reduced to the initial position and At the same time, since the new wire cut by the transfer means 21 at the insertion position of the wire 15 is transferred and inserted into the collet 25, the index table 24 rotates one step.

Accordingly, when the wire 15 processed with the locking groove 6 reaches the unloading position, the extraction finger 43 moves to the index table 24 side by driving the cylinder 42 to hold the wire 15. Since the holding state of the wire 15 is released after returning to the next unloading position, which is the initial position, the wire 15 freely falls to the unloading position.

After the wire 15 processed by the above operation is freely dropped and placed on the ejection table 44 side of the unloading position, the ejection plate 46 is moved by the driving of the cylinder 45. The wires 15 placed on the wires are moved by one step and aligned with the storage box 48 along the downwardly inclined guide plate 47. (S18)

As described above, the wire 15 wound on the bobbin 14 is transferred by a predetermined length, cut into electrical rows, inserted into the collet 25 of the index table 24, and rotated by one step. As one cycle has been described in which the locking groove 6 is formed at the end, and then the unloaded finished wire 15 from the collet 25 of the index table 24 is aligned in the stacking box 48. It will be understood that the above operation is carried out sequentially while the wire 15 is wound around the bobbin 14.

As described above, the present invention has the following advantages over the conventional wire processing method.

First, the wire is not cut by a punch or cutter, but heats due to the application of power, and then is cut while tensioning it. Therefore, no burr is generated at the cutting part, and accordingly, the wire is not subjected to a separate grinding process due to burr generation. It can be easily inserted into the tube to improve the productivity.

In addition, since the cutting surface is tensioned to form a tapered shape, the insertion of the tube becomes easier.

Second, loading, locking groove processing, and unloading operations are sequentially performed while the index table is rotated while the wire cut to a predetermined length is inserted into a plurality of collets installed in the index table, thereby producing one ent wire. It takes 1.6 seconds to significantly reduce the time required.

Third, since at least one locking groove is formed at one end of the wire, the tensile strength with the injection molded product is increased, and thus the tensile strength at the connection part is improved to 7 to 13 Kg / f even in the wet season.

Fourth, since the finished product formed with the locking groove is taken out in a state aligned evenly in the loading box in the process of taking out to the outside of the device, it is possible to proceed with the insertion of the tube without a separate alignment process.

Fifth, as the dressing operation is performed without removing the polishing wheel from the equipment, the slider automatically compensates the feeding distance of the polishing wheel as much as the diameter is reduced according to the dressing.

Claims (3)

As the pair of rollers are rotated by the driving of the stepping motor, the wire wound by the bobbin is transferred to the set value of the stepping motor while being inserted into the groove formed in the roller, and the wire transferred by the driving of the stepping motor. Holding both ends of the wire to generate heat by applying a weak voltage and a strong current to the wire, and pulling the wire to cut it while reducing the wire diameter of the heating portion; and holding the wire cut to the predetermined length by the transfer means. Inserting a wire into one collet in an index table having a plurality of collets inverted by 180 °, and when the wires reach a predetermined position by sequentially inserting the wires into the collets of the index table and rotating by one step. Locking with polishing wheel while rotating collet while supporting one end of exposed wire Forming a groove, and when the locking grooved wire reaches the unloading position due to the continuous rotation of the index table, the extraction finger holds the wire from the collet, takes out the wire, and then unloads the unlocking position; When the processed wire is placed on the take-out table located in the unloading position, the step of taking out by transporting by one step by the take-out plate by stacking step is carried out sequentially. The method of claim 1, The wire cut to the predetermined length by the conveying means is inserted into the collet of the index table, and then, as the index table rotates by one step, the pusher moves forward to further advance the wire inserted into the collet in the insertion direction of the wire. An anti-wire processing method for a retractable antenna, characterized in that the addition. The method of claim 1, As the abrasive wheel is worn by the continuous use of the abrasive wheel, the abrasive stone moves to the polishing wheel side to perform dressing, and at the same time, the step of compensating the feed amount of the slider for transporting the polishing wheel to the wire side by the dressing amount of the polishing wheel is added. The anti-wire processing method of the retractable antenna characterized by the above-mentioned.