JPH01202137A - Wire cutting method for winding machine - Google Patents

Abstract

PURPOSE:To cur off a wire without fail at a tongue section, by stretching the wire between a wire gripper at a winding start end and a winding finish end and the tongue of the commutator of an armature core, at an acute angle to the tongue, and by applying a shearing force to the wire of the edge section of the tongue section, to cut off the wire. CONSTITUTION:When the section of an armature core A to be wound up is perfectly wound up with a winding, then a wire W is set in the wound-up state of the wire connected to a tongue t. Then, by a wire gripper 7, the wire W1 of the winding finish end of the wire W is gripped. After that, a hook member 10 is hooked on the wire W1 stretched between the wire gripper 7 and the tongue t, near the tongue t, and the wire W1 is stretched in the shape of an acute angle to the tongue t, and a shearing force is applied to the wire W1 positioned at the edge section of the tongue t, to cut off the wire.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to the method of winding wires around an armature core using a winding machine, and connecting the wires to the tongues of a commutator of the armature core. The present invention relates to a method of cutting the winding start end and winding end of the wire near the tongue when winding the wire in sequence.

(Prior Art) Conventionally, when winding wire around an armature core equipped with commutator tongues using a winding machine, the wires are connected to each tongue and then wound. At the start and end of the winding, it is necessary to cut the wire located between the wire grip and the commutator tongue of the armature core around which the wire is wound, near the tongue. A cutting method using scissors or a method of cutting by rotating the armature core was adopted.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional cutting method using scissors, although the scissors can advance to the vicinity of the tongue for cutting,
Uncut ends of the wire inevitably occur, and these uncut ends come into contact with adjacent tongues, causing a short circuit. Also, in the method of cutting the armature core by rotating it, the cutting operation is difficult. In addition to lack of smoothness, the cutting location was not determined, and the same drawbacks as described above still remained.

Therefore, the present invention has been developed to cut wire in a winding machine that can reliably cut the winding start end and winding end of the wire at the tongue part, and shorten the uncut end as much as possible to eliminate the cause of short circuits. The purpose is to provide a method.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention supports an armature core provided with a tongue of a commutator to be wound so that it can rotate intermittently around its axis, and A wire to be wound drawn out from a supply source is supplied to a flyer that rotates in the axial direction of the iron core, and the wire is wound and connected to the tongue of the commutator by intermittent rotation about the axis of the armature core, and the flyer rotates in the axial direction of the iron core. In the winding method, the wire is wound around the armature core by the rotation of the winding, and the end of the wire extending from the flyer is held by a wire gripper as the winding ends. The gist of this method is to pull the wire at an acute angle to the tongue, and to apply a shearing force to the wire at the edge of the tongue by this pulling action to cut it.

(Function) The wire between the wire gripper and the tongue of the commutator of the armature core at the start and end of the winding is pulled at an acute angle to the tongue, and this pulling action creates a shearing force on the wire at the edge of the tongue. and cut the wire at the edge of the tongue.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

First, the general structure of the winding machine used in the method of this example will be explained. In the figure, 1 is the first chuck means in the winding machine, which is horizontal to the frenim (not shown) of the winding machine. The commutator side of the armature core A with the tongue of the commutator to be wound is inserted into the shaft part A.
For example, the chuck has a collet-like chuck (not shown) to grip 1, and can be rotated intermittently around its axis at a predetermined pitch (set by the number of tongues), and can also move forward and backward in the axial direction. It is configured to be movable.

At 2 degrees 2 with respect to the frame of the winding machine (not shown) is a pair of left and right second chuck means. The armature core A gripped by the chuck means 1 of 1 is movable forward and backward in a direction orthogonal to the axial direction, and arc-shaped recesses 2a, 2a are provided at approximately the center of the opposing surface of the armature core A. The chuck means 1 is formed so as to be aligned with the center axis of the chuck means 1, and within these recesses 2a, the parts (two pairs of spaced apart core slots) where the armature core A is to be wound are vertically aligned. The structure is such that it can be held from both sides along the axial direction.

A support tube 3.degree. 3 is rotatably integrally supported in the center of the second chuck 2 in a direction perpendicular to the first chuck means 1, and a flyer is attached to the support tubes 3,3. Arms 4, 4 are attached to extend outside the second chuck means 2, 2, and a pulley 5.5 is rotatably supported at the tip of the flyer arm 4.4. Furthermore, an opening is formed in the vicinity of the mounting portion of the flyer arms 4, 4 in the support tube 3.3, and a guide pulley 6.6 is rotatably supported in this opening.

As a result, both flyer arms 4.4 rotate in the axial direction of the armature core A as the support tube 3. The wire W to be wound around the armature core A is introduced from its supply source into the support tubes 3 and 3, and is rotated in directions facing each other so as to draw a trajectory with a radius. 3
, 3 are guided through guide pulleys 6.6 to pulleys 5, 5 of the outer 7-layer arm 4.4.

The wire gripper 7.7 moves back and forth along the axial direction of the armature core A on the commutator side of the armature core A with respect to the frame (not shown) of the winding machine, and moves back and forth in a direction perpendicular to the axial direction. The grip portion at the tip of the wire W extends from the pulleys 5, 5 of the flyer arms 4, 4 and is connected to the tongue t of the commutator of the armature core A to be wound. It is faced so that it can appear on the trajectory,
The starting end of the wire W wound around the armature core A is grasped. That is, at the end of the winding, the wire gripper 7.7 moves the wire W extending from the pulley 5.5 of the flyer arm 4.4 by advancing along the axial direction toward the armature core and advancing in a direction orthogonal to the coaxial direction. Hold the winding end (winding start end) of the winding, and when cutting the winding start and end of the winding, and during winding work, hold the wire W and move it in the direction orthogonal to the axial direction of the armature core A and the armature core. It is configured to be moved back along the axial direction of A and wait at that position.

The cutting means 8.8 is obliquely movable relative to the frame (not shown) of the winding machine from a side perpendicular to the shaft end of the armature core Δ toward the commutator side of the armature core. A hydraulic cylinder 9 is installed and serves as a driving source, and a hook member 10 is attached to the tip of a rod 9a of the hydraulic cylinder 9.
This hook member 10 is composed of a rod 9
When the wire A moves forward, the wire W extending from the pulleys 5, 5 of the 7-layer arms 4, 4 is wound and connected to the tongue t of the commutator of the armature core A at the winding start end (winding end), and is gripped by the wire gripper 7.7. The hooked wire W is hooked near the tongue t, and when the rod 9a retreats, the hooked wire W is pulled at an acute angle with respect to the tongue t. Note that the portion of the hook member 10 where the wire W is hooked is formed into a curved surface and a smooth finished surface in order to eliminate resistance to the wire W as much as possible.

Next, the method of this example will be explained using the winding machine configured as described above.

Now, the wire W to be wound prior to winding on the armature core A is introduced from the supply source into the support tubes 3. The flyer arm 4.4 is guided to the pulleys 5, 5, respectively, and the end (also referred to as the winding end or the winding start end) roughly extending from the pulley 5.5 is gripped by a wire gripper 7.7. A wire gripper 7.7 is waiting at a predetermined position. (See Figures 1 and 2) Therefore, the armature core A equipped with the tongue t of the commutator to be wound is supplied to the chuck section of the winding machine, and the first chuck means 1 is moved in the axial direction. The armature core A is moved forward and the commutator side of the supplied armature core A is inserted, and its shaft portion A1 is gripped by the first chuck means 1, and further by the second chuck means 2.2.
is advanced in a direction perpendicular to the axial direction of the armature core A to open the recess 2a.

2a, the axial side surfaces of the armature core A are held from both sides, leaving a portion of the armature core A to be wound (two pairs of spaced apart core slots).

Then, an initial operation is performed to rotate the flyer arm 4.4 to wind and connect the wire W to the tongue t at the beginning of winding, and to perform initial winding at a predetermined portion of the armature core A to be wound. At this time, the winding start end of the wire W is gripped by the wire gripper 7.7.
7 and the tongue t is a wire W corresponding to the winding start end.
1 is set. (See FIGS. 2 and 3) Next, when the above operation is completed, the rod 9a of the hydraulic cylinder 9 in the cutting means 8 is advanced, and the hook member 10 at the tip is connected to the wire gripper 7.7 and the tongue t. A wire W1 corresponding to the starting end of the winding stretched between them is hooked near the tongue t.

(See Figure 5) Then, the rod 9a is moved back and the hooked wire W1 is
is pulled at an acute angle to the same tongue t.

This pulling action causes a shearing force to act on the wire W1 located at the edge of the tongue t, and this shearing force cuts the wire W1 at the edge of the tongue t (Figs. 6 and 8, (See imaginary line in Figure 2). In this case, shearing force acts on the wire W1 at the gripping portion of the wire gripper 7.7 and at the hooking portion of the hook member 10, but these shearing forces are much stronger than the shearing force acting on the edge portion of the tongue t. It is set to a small value.

When the above-mentioned cutting operation is completed, the flyer arm 4.4 is placed around the outside of the second chuck means 2.2 for winding operation so as to draw a trajectory having a radius in the axial direction of the armature core A. They are rotated in the same direction to perform a series of windings on the portions of the armature core A that are to be wound. (See FIG. 4) In this case, the wire W to be wound is supplied from the supply source to the support cylinder 3.
3 and the guide pulley 6.
6 to reach the pulleys 5, 5 of the outer flyer arm 4.4.

Next, when the winding is completed, the second chuck means 2.
The armature core A is once released from being clamped by the armature core A by the first chuck means 2.2, rotated intermittently at a predetermined pitch by the first chuck means, and then the armature core A is clamped again by the second chuck means 2.2 as described above. do.

The flyer arm 4.4 is then rotated for the winding operation as described above to perform a series of windings on the portion of the armature core A to be wound. Then, the above operation is repeated every time the first chuck means rotates at a predetermined pitch, thereby performing continuous winding work. W is connected to the tongue t as a lead wire. (Refer to Figure 8) When all the parts of the armature core A to be wound have been wound, the wire W from the pulley 5.5 of the flyer arm 4.4 is wound around the last tongue t. The circuit is connected. Therefore, the wire gripper 7.7 is moved forward in the axial direction of the wound armature core A as the winding ends, and in a direction orthogonal to the coaxial direction to move the flyer arms 4, 4 forward. The wire W1 corresponding to the end of the winding of the wire W extended from the pulleys 5, 5 is grasped, and the wire W1 is placed on standby at the initial position again.

Next, as described above, the rod 9a of the hydraulic cylinder 9 in the cutting means 8 is advanced to remove the hook member 10 at the tip.
The wire W1, which corresponds to the end of the winding stretched between the wire gripper 7.7 and the tongue t, is hooked near the tongue t (see FIG. 5), and the rod 9a is pulled back! Then, the hooked wire W1 is pulled at an acute angle to the tongue t, and this pulling action causes a shearing force to act on the wire W1 located at the edge of the tongue t. W1 is cut at the edge of the tongue t (see Figures 6 and 8). In this way, the wire W1 corresponding to the winding start and winding ends in the winding work for the armature core A is cut. Since the cutting is performed using the edge of the tongue t of the commutator of the armature core A by pulling the wire W1, the uncut end is made as short as possible.

(Effects of the Invention) As described above, in the present invention, the wire between the wire gripper and the tongue of the commutator of the armature core at the winding start end and the winding end is pulled at an acute angle with respect to the tongue. By applying a shearing force to the wire at the edge of the tongue by a pulling action and cutting the wire at the edge of the tongue, the winding start end and winding end of the wire can be easily cut at the tongue, and The uncut end can be made as short as possible. This prevents defects caused by short-circuiting of the uncut ends of the wires in the tongues, and this effect is particularly noticeable in the windings of the armature core with a large number of tongues.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view schematically showing the outline of the winding machine, Fig. 2 is a side view schematically showing the gripping state of the wire gripper, and Fig. 3 is a plan view. , FIG. 4 is a front view schematically showing the wire winding state by the flyer arm, FIGS. 5 and 6 are front views schematically showing the wire cutting state, and FIG. 7 is a perspective view schematically showing the cutting means. FIG. 8 is an enlarged explanatory view of the wire connected to the tongue. 1... First chuck means 2... First chuck means 4... Flyer arm 7... Wire gripper 8... Cutting means A... Armature core t... Tongue W... ... Wire Applicant Makita Electric Manufacturing Co., Ltd. Agent Patent Attorney Oka 1) Ei Guo 2 Figure 3 Figure 5 W Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] An armature core equipped with a commutator tongue to be wound is supported for intermittent rotation around its axis, and a wire to be wound drawn out from a supply source is supplied to a flyer rotating in the axial direction of the armature core. The wire is wound and connected around the tongue of the commutator by intermittent rotation around the axis of the armature core, and the wire is wound around the armature core by the rotation of the flyer, and the wire extending from the flyer is wound as the winding is completed. In a winding method in which the end portion is held by a wire gripper, the wire between the wire gripper and the tongue of the commutator at the start and end of the winding is pulled at an acute angle with respect to the tongue, and this pulling action causes the edge portion of the tongue to A method for cutting a wire in a winding machine, the method comprising applying a shearing force to the wire and cutting the wire.