JPH0614484B2 - Automatic winding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an automatic winding capable of producing a so-called wound resistor, a heater and the like formed by winding a resistance wire around a cylindrical ceramic body. The present invention relates to a machine, and more particularly, to an automatic winding machine capable of automatically manufacturing a highly accurate wire-wound resistor or heater by setting a desired resistance value or the like.

(B) Conventional technology Conventionally, the above-mentioned wire-wound resistor has a winding process of a ceramic body on a winding machine, a wire winding process by rotating a spindle, and a metal cap and a wire rod fixed on both ends of the body. Many processes, such as the welding process and the cutting process of the wire rod, are separated from each other, and each process requires a unique technique, and it has been considered difficult to automate.

Under these circumstances, the winding resistors manufactured are
The accuracy of the resistance value also causes an error of 5 to 10%, and the manufacturing speed is limited to 6 to 7 pieces per minute even when a skilled worker works for a short time. is there.

(C) Problems to be Solved by the Invention An object of the present invention is to completely automate the conventional winding resistor manufacturing process as described above, to improve the manufacturing speed more than that of a skilled worker and to greatly improve the quality. Therefore, the device itself for that purpose is to be manufactured inexpensively with a rational structure.

(D) Means for Solving the Problem Therefore, in order to achieve such an object, according to the present invention, a resistance wire is welded to a front end side cap of an element body in which caps are attached to both ends of a cylindrical insulator. An automatic winding machine for winding a resistance wire around an insulator and welding the resistance wire to a rear end side cap to wind and fix the resistance wire around an element body to produce a wire wound resistor, A nozzle mechanism that supplies the resistance wire inserted inside to the element body, a chuck mechanism that grips the end portion of the element body, and the element body that is gripped and fixed by the chuck mechanism is rotated with the center axis of the element body as the rotation axis. The nozzle mechanism includes a spindle mechanism and a welding electrode mechanism having electrodes for welding the resistance wire to caps attached to both ends of the element body, and the nozzle mechanism includes a resistance wire for the rear end side cap of the element body. Pull the resistance wire supplied when welding to By providing a tension applying means for applying a tension to the resistance wire by doing so, when welding the resistance wire to the rear end side cap of the element body,
By applying tension to the resistance wire by pulling the resistance wire by the tension applying means, and by energizing the electrode to weld the resistance wire to the cap, the resistance wire can be melt-cut on the nozzle side of the welded portion. It is characterized by being formed.

(E) Action In the present invention, since it has the above-mentioned configuration,
As described above, when the resistance wire is welded to the rear end side cap of the element body, tension is applied to the resistance wire by pulling the resistance wire by the tension applying means, and the resistance wire is energized to the resistance wire. By welding to the cap, the resistance wire is blown off on the nozzle side of the welded portion.

Therefore, according to the present invention, when the resistance wire is welded to the rear end side cap of the element body, the resistance wire is pulled in the nozzle direction by the tension applying means and given a predetermined tension,
By energizing the electrodes and welding the resistance wire to the cap, the resistance wire can be easily, automatically, and quickly cut without the need for human intervention.

(F) Example Hereinafter, the present invention will be described in detail based on an example described in the accompanying drawings.

FIG. 1 is a top view showing the structure of an embodiment of the present invention, and FIG.
The figure is a partial side view thereof.

As shown in FIGS. 1 and 2, the automatic winding machine 63 according to the present embodiment has a front end side front end of an element body 24 in which front end side caps 29 and 48 are attached to both ends of a cylindrical insulator 8. The resistance wire 17 is welded to the side cap 29, the resistance wire 17 is wound around the peripheral surface of the insulator 8, and the resistance wire 17 is welded to the rear end side cap 48 to wind the resistance wire 17 around the element body 24. It is configured to be mounted and fixed to produce a wire wound resistor.

Then, the frame 1 of the automatic winding machine 63 according to the present embodiment.
The side plate 57 has the spindle 2 provided inwardly of the frame 1, and has a tapered concave portion 3 at the tip thereof.
Is provided. Further, the rear end is connected to the pulse motor 5 through the joint 4 so that it can be rotationally driven at an arbitrary rotational speed and at an arbitrary rotational speed by a drive signal from the outside. . And the rotation speed is 1
It can be controlled even in a minute range of / 200 to 1/400 rotation. Further, a chuck 6 which is coaxially opposed to the rotation axis of the spindle 2 and can hold an element body 24 between the spindle 2 and the spindle 2 is rotatable and axially slidable in the frame 1. It is fixed to the side plate 62,
The movement in the axial direction is performed by the air cylinder 7 attached and fixed to the outside of the side plate 62 via the connecting portion 8.

Further, a tapered concave portion 3 is also provided at the tip of the chuck 6, and the element body 24 is formed by the concave portion 3 provided on the spindle and the concave portion 3 provided on the chuck 6.
4 is pressed and held from both ends.

As shown in FIG. 2, a pair of welding electrodes 9 are provided above and below the spindle 2 to form a U-shaped movable frame 10.
Further, each is provided by an air cylinder 11 so as to be able to advance and retreat in the vertical direction, and a U-shaped swing frame 12 is similarly mounted inside the movable frame 10 so as to be rotatable coaxially with the welding electrode 9. ing.

Then, the swing frame 12 is joined via a pin 47 provided at the tip of an arm 59 provided on the air cylinder 13 fixed to the side plate 57 of the frame 1, so that the swing frame 12 has a fixed angle on the movable frame 10. It is configured to be rotatable.

Further, the movable frame 10 is supported by the frame 1 via a feed screw 14 having a thread groove and a guide shaft 15, and according to the rotation of a pulse motor 16 for rotationally driving the feed screw 14, The drive frame 10 is moved along the rotation axis direction of the spindle 2 so that the position of the welding electrode 9 can be set appropriately, and a resistance wire 17 is supplied to the central portion of the swing frame 12. A nozzle mechanism section 18 is provided.

The nozzle mechanism portion 18 is supplied with resistance when the resistance wire 17 is welded to the nozzle body 50 in which the resistance wire 17 is inserted in the axial direction and the resistance wire 17 to the rear end side cap 48 of the element body 24. A tension applying means 64 capable of applying tension to the resistance wire 17 by pulling the wire 17 and the resistance wire 17
4 is provided with a nozzle rotating portion 58 that can rotate the nozzle body 50 by a predetermined angle when the nozzle body 50 is welded to the rear end side cap 48.

In the present embodiment, the tension applying means 64
As shown in FIG. 2, the nozzle advancing / retreating drive unit 51 that can retreat the nozzle 20 in the direction away from the element body 24.
And a resistance wire fixing portion 52 capable of fixing the resistance wire 17 inside the nozzle 20 after the backward movement of the nozzle 20 is started.

Inside the nozzle body 50, the resistance wire 1 is provided along the axial direction.
A resistance wire supply groove 56 through which 7 is inserted is provided.

The nozzle advancing / retreating drive unit 51 is configured to move the swing frame 12
It is composed of two air cylinders 19 fixed to the back surface in the vertical direction, and these two air cylinders 19 are fixed to the mounting plate 60 of the nozzle body 50 via arms 61, respectively. The nozzle body 50 and the resistance wire fixing portion 52 are fixed to the mounting plate 60, and the operation of the air cylinder 19 causes the nozzle body 50 and the resistance wire fixing portion 52 to separate from the element body 24 (see FIG. 1). Inside, body 2
4 to the right) and the body 2
4 is configured so that it can be advanced to a position where a resistance wire can be wound.

The resistance wire fixing portion 52 is composed of an air cylinder 23 provided so as to project rearward of the apparatus, and a clamp mechanism 53 driven by the air cylinder 23.

The clamp mechanism 53 includes a clamp lever 21 formed in an L shape and a shaft 22. The clamp lever 21 is operated by an air cylinder 23 so that the shaft 22 is
The resistance wire 20 can be fixed inside the nozzle body 50 by rotating around the center of the clamp lever 21 and pressing the resistance wire 20 against the inner surface of the resistance wire supply groove 56 by the clamp portion 55 formed at the tip of the clamp lever 21. Is configured.

The nozzle rotating portion 58 includes the air cylinder 13 fixed to the side plate 57 of the frame 1, an arm 59 that performs an advancing and retracting operation by the air cylinder 13, and the nozzle body 5.
A pin 47 pivotally fixed to the nozzle body 50 at an intermediate portion in the longitudinal direction of 0, and is configured to rotate the nozzle body 50 together with the swing frame 12 by a predetermined angle according to the operation of the air cylinder 13. ing.

The resistance wire 17 is wound on a bobbin (not shown) and is given a certain tension so that the resistance wire 17 is supplied to the nozzle mechanism portion 18 without slack.

Furthermore, in the automatic winding machine 63 according to the present embodiment, the shooter portion 25 is provided, and the element body 24 conveyed from the parts feeder (not shown) via the pipe 26 is
The resistance wire 17 can be supplied to a position where it can be wound.

That is, the shooter portion 25 for supplying the cylindrical element body 24 to the spindle 2 has a concave portion 27 for receiving the element body 24 fed from a parts feeder (not shown) through the pipe 26, and is provided by the air cylinder 28. , Spindle 2
It is possible to perform an advancing operation for sending the element body 24 to the rotation axis position of 1 and a retracting operation for returning to the original position, and receive a new element body 24 on which the resistance wire is to be wound next at the retracted position. It is configured to be able to.

The pulse motors 5 and 16 and the air cylinders 7 and 1
1, 13, 19, 23, and 28 are configured to be comprehensively controllable by a drive circuit unit having an arithmetic control function (not shown).

Next, the operation of the automatic winding machine according to the present embodiment will be described with reference to FIGS.
It will be described with reference to the drawings.

First, the resistance value of the resistor to be manufactured, the element body diameter, the element body length, and the resistance value per 1 m of the wire rod are set. The resistance wire 17 is inserted into the resistance wire supply groove 56 in the nozzle mechanism portion 18 and set in the automatic winding machine 63 according to this embodiment, and the number of manufactured pieces is designated. In this case, in a drive circuit unit (not shown), the rotation speed of the pulse motor 5 and the rotation speed of the pulse motor 16 are determined from the total number of windings of the resistance wire 17, and how many times the resistance wire 17 is wound around the element pair 24. Set.

After that, the air cylinder 28 operates and the shooter 25
Transports the element body 24 supplied from the parts feeder to the position of the rotation axis of the spindle 2.

After that, the air cylinder 7 is actuated, the chuck 6 moves forward, and the element body 24 is sandwiched between the conical recess 3 of the spindle 2 and the conical recess 3 of the chuck 6, and the spindle 2 and the chuck 6 are inserted. Holds the body 24 in the air. In this state, the air cylinder 28 moves backward and the shooter 25 returns to the initial position.

At this time, the winding tip of the resistance wire 17 is supported by the nozzle mechanism portion 18 so as to come to a position where it can come into contact with the front end side cap 29 of the element body 24.

Therefore, when the air cylinder 11 is actuated, the welding electrode 9 holds the front end side cap 29 with the resistance wire 17 in contact with the upper part from above and below via the resistance wire 17, and the welding electrode 9 Resistance wire 1 by energizing
The winding tip of No. 7 can be welded to the upper portion of the front end side cap 29.

In this case, when the resistance wire 17 is welded in parallel to the end circumferential surface of the front end cap 29, the front end cap 29 of the front end cap 29 is provided between the peripheral surface of the insulator 8 and the front end cap 29. Since the step is formed by the thickness, when the resistance wire 17 is wrapped around the element body 24, when the resistance wire 24 passes through the step, the resistance wire 17 comes into incomplete contact with the front end side cap 29 of a certain length. A part may be generated, and the electric resistance of this part may become unstable.

Therefore, at the time of welding to the front end side cap 29, the air cylinder 13 constituting the nozzle mechanism portion 18 operates,
The swing frame 12 is rotated clockwise in FIG. 1 so that a large angle is formed between the resistance wire 17 and the edge of the front end side cap 29. Upon completion of welding, the electrode 9 is separated from the resistance wire 17 and the front end side cap 29 by the backward movement of the air cylinder 11.

As a result, the pulse motor 16 is rotated by the preset number of rotations in the drive circuit section, and the movable frame 10 having the nozzle mechanism section 18 is moved from the front end side cap 29 toward the central portion of the insulator 8 and the insulator 8 Move to the winding start position. Here again, the air cylinder 13 operates,
By retracting the arm 59, the swing frame 1
2 also rotates counterclockwise and returns to the position at right angles to the axial direction of the element body 24.

From this state, the pulse motor 5 rotates to continuously pull out the resistance wire 17 from the nozzle 20, and the pulse motor 16 rotates to move the movable frame 10 to the element body 24.
To the rear end side cap 48 and move to the insulator 8 of the element body 24.
Then, the resistance wire 17 is accurately wound by a predetermined interval and length.

When the winding of the resistance wire 17 is completed, the air cylinder 13 operates again, and the arm 59 projects to rotate the swing frame 12 in the clockwise direction, so that the winding direction of the resistance wire 17 is changed to the rear end side cap 48. Modify to form a large angle with the edge of.

After that, since the pulse motor 16 rotates by the number of rotations set in advance in the drive circuit unit, the resistance wire 17
Goes over the step formed between the rear end cap 48 and the peripheral surface of the insulator 8, and the winding rear end of the resistance wire 17 is set at an appropriate position on the rear end cap 48.

Next, the air cylinder 11 is operated, and the welding electrode 9 again sandwiches the rear end side cap 48 from above and below via the resistance wire 17.

Then, next, the tension applying means 64 is activated to pull the resistance wire 17 toward the nozzle body 50 to apply tension to the resistance wire 17.

That is, first, the two air cylinders 19 forming the nozzle advancing / retreating drive part 51 constituting the tension applying means 64 are operated,
The nozzle 20 starts to retract in the direction away from the element body 24 (to the right of the element body 24 in FIG. 1).

Next, the air cylinder 23 that constitutes the resistance wire fixing portion 52 operates to operate the clamp mechanism 53. That is, when the clamp lever 21 rotates about the shaft 22, the clamp portion 55 presses the resistance wire 17 against the resistance wire supply groove 56, and fixes the resistance wire 17 inside the nozzle 20.

In this case, since the nozzle 20 continues to be separated from the element body 24 as described above, the resistance wire 17 is pulled toward the nozzle 20 by the operation of the resistance wire fixing portion 52, and the resistance wire 1
7 is in a tensioned state.

When the electrode 9 is energized in this state,
The resistance wire 17 is welded to the rear end side cap 48,
Since the nozzle 20 continues to be separated from the element body 24, the resistance wire 17 is cut off on the nozzle 20 side of the welding portion and automatically melted.

Therefore, in this embodiment, the winding and welding operation of the resistance wire 17 is completed without separately providing a cutter mechanism or the like for cutting the rear end of the resistance wire 17 wound around the element body 24 after welding. You can

Further, as described above, in this embodiment, the nozzle 2
After starting the backward movement operation of 0, the resistance wire 17 is connected to the resistance wire fixing portion 52.
Is configured to be fixed inside the nozzle 20 by the above, and since the nozzle 20 is configured to fix the resistance wire 17 and melt the fuse after starting to separate from the element body 24,
By moving the nozzle 20 during this period, the resistance wire 1 having a predetermined length is
7 projects from the tip of the nozzle body 50.

Therefore, the resistance wire 17 after cutting is in a state of protruding by a predetermined length from the tip end portion of the nozzle body 50, and is welded again when welding to the front end side cap 29 of the new element body 24 to be wound next time. It is possible to omit the step of sending out the resistance wire 17 of the required length.

In the present embodiment, the resistance value of the resistance wire 17 accurately wound and welded by the pulse motors 5 and 6 is extremely accurate, and only an error in the shape of the element body 24 remains, and the measurement accuracy is about 2%. .

After the fusing of the resistance wire 17 is completed, the welding electrode 9 is returned in the vertical direction by the air cylinder 11 and the pulse motor 16 is rotated in the reverse direction to return the entire movable frame 10 to the initial winding operation position. When the holding of the element body 24 by the chuck 6 is released by the cylinder 7, the completed winding resistor leaves the spindle 2 and drops downward, and is stored in a stacker (not shown).

If the above steps are repeated by the specified number of manufactured wires, the wound resistor is manufactured one after another, and no manpower is required during this time. In addition, the operation is extremely efficient because it is a continuous series of operations using a pulse motor and an air cylinder, and the time required to manufacture one piece is actually over 6 seconds, which is 50% faster than the speed performed by humans. .

In the present embodiment, the case where the tension applying means includes the nozzle advancing / retreating drive section 51 and the resistance wire fixing section 52 has been described as an example, but the configuration of the tension applying means is the present embodiment. It is not limited to

FIG. 3 is a partial top perspective view showing the structure of another embodiment of the present invention.

In FIG. 3, element bodies 32 having caps 31 with wire-like leads 30 at both ends are fed into shooter 33 from above the sheet in a state of being aligned in parallel by a parts feeder (not shown). The shooter 33 is formed in a U shape so as to be bent in a direction parallel to the lead 30 with a flexible leaf spring material or the like, and a V-shaped notch 34 is provided at a tip portion thereof to support the lead 30. There is. A fixed guide 35 is provided on the outer side of the shooter 33 so that the leads 30 are housed within a certain range. Further, the shooter 33 is supported by the frame 1 so as to be movable back and forth by an air cylinder 36. The frame 1 is omitted in the drawing. 37 is a spindle and 38 is a chuck. Both have inner taper portions 39 and 40 and deep holes 41 and 42 at the tip. The spindle 37 can be rotated by a pulse motor 43, and can be axially projected and retracted by an air cylinder 44. The chuck 38 has a structure similar to that shown in FIGS. 1 and 2, and can be axially projected and retracted by an air cylinder 46 via a coupling portion 45.

The winding machine having the shooter 33 as shown in FIG. 3 can completely and automatically complete the winding process even with the element body having the cap 31 provided with the wire-shaped leads 30. That is, the element body 32 fed into the shooter 33 from above the paper surface is provided with a notch 34 near the tip of the lead 30.
Supported by.

In this state, the air cylinder 36 causes the spindle 37
The body 30 extruded to the axial center of the lead 30 has the lead 30 formed by the inner taper portions 39 and 40 by the protruding movement of the spindle 37 and the chuck 38 by the air cylinder 44.
It is guided into the inside of 1, 42 and is securely chucked. In general, the lead 30 is often bent to some extent, and it is difficult to center it correctly and chuck it. However, in the present embodiment, it is extremely easy to perform as described above.

Since the shooter 33 can bend in a direction parallel to the lead 30, it deforms as shown by the dotted line due to the protrusion of the spindle 37 and the chuck 38.
When it is returned to the original position by 6, the original U-shape is restored. Since the operation thereafter is the same as that described with reference to FIGS. 1 and 2, the movement of the air cylinder 44 for projecting and retracting the spindle 38 is exactly the same as that of the air cylinder 46 for projecting and retracting the chuck. Only what is said and others are omitted.

(G) Effects of the Invention As described above, according to the automatic winding machine of the present invention, all the steps in the manufacture of the winding resistance component can be automated with a rational structure, which is high speed and high. It is possible to improve the accuracy, and further, it is possible to apply it as it is to the manufacture of winding heaters and the like.

[Brief description of drawings]

FIG. 1 is a top view showing the structure of one embodiment of the present invention,
FIG. 2 is a partial front view thereof, and FIG. 3 is a partial top perspective view showing the structure of another embodiment of the present invention. 1 ... Frame, 2 ... Spindle 3 ... Recess, 4 ... Joint 5 ... Pulse motor, 6 ... Chuck 7 ... Air cylinder, 8 ... Insulator 9 ... Welding electrode, 10 ... Movable frame 11 ... Air cylinder, 12 ... Swing frame 13 ... Air cylinder, 14 ... Feed screw 15 ... Guide shaft, 16 ... Pulse motor 17 ... Resistance wire, 18 ... Nozzle mechanism section 19 ... ... Air cylinder, 20 ... Nozzle 21 ... Clamp lever, 22 ... Shaft 23 ... Air cylinder, 24 ... Element body 25 ... Shooter, 26 ... Pipe 27 ... Recess, 28 ... Air cylinder 29 ... ... front end side cap, 30 ... lead 31 ... cap, 32 ... element body 33 ... shooter, 34 ... notch 35 ... guide, 36 ... air cylinder 37 ... spindle, 38 ... chat 39 ... inner taper part, 40 ... inner taper part 41 ... deep hole, 42 ... deep hole 43 ... pulse motor, 44 ... air cylinder 45 ... coupling part, 46 ... air cylinder 47 ... pin , 48 ... rear end side cap 50 ... nozzle main body, 51 ... nozzle forward / backward drive section 52 ... resistance wire fixing section, 53 ... clamp mechanism 55 ... clamp section, 56 ... resistance wire supply groove section 57 ... Side plate, 58 ... Nozzle rotating part 59 ... Arm, 60 ... Mounting plate 61 ... Arm, 62 ... Side plate 63 ... Automatic winding machine, 64 ... Tension applying means

Claims (2)

[Claims] 1. A resistance wire is welded to a front end side cap of an element body in which caps are attached to both ends of a cylindrical insulator, the resistance wire is wound around the peripheral surface of the insulator, and the resistance wire is attached to the rear end side cap. What is claimed is: 1. An automatic winding machine for winding and fixing a resistance wire on an element body by welding to produce a wire wound resistor, comprising: a nozzle mechanism for supplying the resistance wire inserted thereinto to the element body; A chuck mechanism that grips the body end, a spindle mechanism that rotates the element body that is gripped and fixed by the chuck mechanism with the central axis of the element body as a rotation axis, and the resistance wire is welded to caps attached to both ends of the element body. And a welding electrode mechanism having an electrode for, in the nozzle mechanism, when the resistance wire is welded to the rear end side cap of the element body, by pulling the resistance wire supplied to the resistance wire Is provided with a tension applying means capable of applying tension Ri, when welding the resistance wire to the rear end cap of the element body,
By applying tension to the resistance wire by pulling the resistance wire by the tension applying means, and by energizing the electrode to weld the resistance wire to the cap, the resistance wire can be melt-cut on the nozzle side of the welded portion. An automatic winding machine characterized by being formed. 2. The tension applying means includes a nozzle advancing / retreating drive section capable of retracting the nozzle in a direction away from the element body, and a resistance wire fixing section capable of fixing a resistance wire inside the nozzle after the nozzle retreating operation is started. The automatic winding machine according to claim 1, further comprising: