JPH02151221A - Cutting amount setter for stripper - Google Patents

Abstract

PURPOSE:To maintain constant machining quality by detecting fluctuation of electrical characteristic between a pair of cutters and the core of a coated wire and setting the cutting amount of coating based on the cutting amount of the cutter at a time point when the fluctuation is sharp. CONSTITUTION:A coating cut amount setter A is provided with a cutter drive means 5 for moving cutters 2a, 2b in directions T and U. A coating cut amount setter B is electrically connected with the core 1a of a coated wire 1 and also connected electrically with the pair of cutters 2a, 2b. Fluctuation of electrical characteristic between the cutters 2a, 2b and the core 1a is detected with the coated section of the coated wire 1 being cut by the cutters 2a, 2b, and the cutting amount of the coating is set based on the cutting amount of the cutters 2a, 2b at a time point when the fluctuation is sharp. Since an optimal cutting amount is set constant regardless of the worker, machining quality can be maintained constant.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a sheath cutting method that sets the sheath cutting amount when cutting the sheathing portion near the front end of a ri electric wire by sandwiching it between a pair of cutters. The present invention relates to a quantity setting device.

(Conventional technology and its issues) FIG. 5 is a perspective view of essential parts of the coating stripping device.

As shown in the figure, the sheath stripping device includes a pair of upper and lower cutters 2a and 2b that are provided so as to be able to sandwich the sheathed wire 1;
A cutter driving means (not shown) that drives the cutters 2a and 2b in conjunction with each other, and a wire moving means (not shown) that moves the coated wire 1 by an appropriate amount in the P direction or the Q direction.
(not shown).

Further, as shown in FIG. 5, the cutters 2a and 2b have blade portions 3a and 3b formed at their respective tips, and are covered with i
When the electric wire 1 is arranged as shown in the figure and the cutters 2a and 2b are moved from the fully open state to the small amount state by the cutter driving means, the blade parts 3a and 3b cut into the sheathing part of the insulated wire 1, respectively. It is composed of

Next, a process for stripping off the coating portion of the coating mold 111 (hereinafter referred to as "strip process") using this coating stripping device will be described.

The stripping process is performed as follows.

First, the coated wire 1 is advanced by an appropriate distance in the P direction, which is the wire feeding direction, by the wire moving means, and the coated portion to be stripped is sent to a position in front of the cutters 2a, 2b. Then, the cutter 2a is driven by the cutter driving means.
2b is driven to shift the cutters 2a and 2b to the small quantity state. As a result, the blade portions 3a and 3b cut into the covered portion of the covered electric wire 1.

After the penetration, the covered wire 1 is moved back in the Q direction in the cut state, and the covering portion of the covered wire 1 is stripped off. As a result, the 6th
As shown in Figure (a), a peel-off end 4 is formed at the tip of the covering mold 111.

By the way, when performing the above stripping process, the blade parts 3a, 3
If the amount of cutting into the coating portion b is too large, the blade portions 3a and 3b will cut into the core wire 1a (FIG. 6(a)) of the coating Nl11. Then, when the covered wire 1 is moved backward in the Q direction in this state, not only the covering portion of the covered wire 1 is stripped off, but also a part of the core wire 1a of the covered wire 1 is scraped off.
A core wire 1a' as shown in Figure (b) is formed, resulting in a stripping error. Therefore, before continuously performing the stripping process on the same wire type, it is necessary to appropriately adjust the amount of cut into the coating part of the blade parts 3a, 3b.

Therefore, in the past, prior to continuous processing of the same wire type, the optimum amount of sheath cutting for the coated wire 1 to be processed was determined by a trial and error method. In other words, after first setting an appropriate value for the coating notch distance and actually performing the stripping process, the operator etc. visually inspects the shape of the peeled edge and confirms that the shape of the peeled edge is good. The optimum coating depth was determined by appropriately modifying the coating depth and repeating the above operations until the optimum coating depth was obtained.

As described above, in the past, human know-how was involved when determining the optimal depth of cut, and the set value varied depending on the operator, making it difficult to maintain machining quality constant at all times. . Further, in the above-described trial and error method, there is a problem in that the time required to find the optimal coating depth increases, resulting in a decrease in production efficiency.

(Purpose of the Invention) This invention was made to solve the above-mentioned problems, and it is possible to maintain the machining quality constant without any variation in the optimum depth of cut due to the operator, etc., and to achieve the optimum coating depth in a short time. An object of the present invention is to provide a coating depth setting device that can determine a coating depth.

(Means for Achieving the Object) This invention cuts the sheathing portion near the face end of the sheathed wire with a pair of cutters, and then retreats the coated wire while maintaining the cut state. In order to achieve the above object, in a sheathing stripping device that performs a stripping process of stripping a front end side of the sheathing part from a cutting position, while cutting the pair of cutters into the sheathing part of the sheathed electric wire, Detecting a change in electrical characteristics between the pair of cutters and the core wire of the covered electric wire, and determining the distance between the insulation cuts based on the depth of cut M of the pair of cutters when the change becomes steep. It is set.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the coating depth setting device according to the present invention. In the figure, A is a coating stripping device to which an embodiment of the coating cutting depth setting device according to the present invention can be applied, and has the same configuration as the coating stripping device shown in FIG. In addition, 5 is a cutter driving means,
Although not shown, the cutter 2a is driven by the cutter driving means 5.

2b in the T and U directions.

The coating cut amount setting means B is electrically connected to the core wire 1a of the covered electric wire 1, and is also electrically connected to the cutter 2a2b. Further, the coating depth setting means B is configured to output a signal as described later to the cutter driving means 5 in response to conduction/non-conduction between the core wire 1a and the cutters 2a, 2b.

Next, the procedure for determining the optimum covering cut distance using the covering cut depth setting means B will be explained with reference to FIGS. 2 to 4.

First, as shown in Figure 2, electric wire moving means (not shown)
As a result, the coated wire 1 is advanced by an appropriate distance in the P direction, which is the wire feeding direction, and the coated portion 1b to be stripped is sent to a position in front of the cutters 2a, 2b. Next, a driving signal is applied from the coating cutting depth setting means B to the cutter driving means 5, and the cutters 2a and 2b are moved to sandwich the covered electric wire 1. At the same time, coating depth setting means B
By i9! Core wire 1a of RL electric wire 1 and cutter 2a,
2b is detected. That is, as can be seen from FIG. 2, while the cutters 2a and 2b have not completely cut into the sheathed portion 1b, the core wire 1a and the blade portions 3a and 3b are not in contact with each other, so that the sheathed wire There is no conduction between the core wire 1a of No. 1 and the cutters 2a, 2b.

After this, the cutters 2a and 2b are cut by the cutter driving means 5.
As the drive progresses, the cutters 2a, 2b will eventually cut completely in the depth direction of the sheathed portion 1b, as shown in FIG. When they come into contact, conduction occurs between them.

When this continuity is detected by the coating cutting depth setting means B, a stop signal is given from the coating cutting depth setting means B to the cutter driving means 5, and the movement of the cutters 2a, 2b is stopped at that position. With this, the core! ! J1a and blade part 3a
, 3b come into contact with the cutter 2a.

The covering depth of 2b is determined. Note that this state (third
When the stripping process is performed as shown in the figure), the core wire 1a of the covered wire 1
and the blade portions 3a of the cutters 2a and 2b.

3b, the core wire 1a of the covered electric wire 1 is scratched by the blades 3a and 3b, resulting in a stripping error.

Therefore, the drive signal is again given to the cutter drive means 5 from the coating depth setting means B, and the core 1 of the coated type $111 is
11a and the blade portions 3a of the cutters 2a and 2b.

The cutters 2a and 2b are moved in opposite directions by a predetermined amount so that they do not come into contact with the cutter 3b (FIG. 4). Then, the amount of coating cut in this state (FIG. 4), that is, the optimum coating cut and depth is stored in a memory circuit (not shown). This results in
The optimum covering depth is set, and the stripping process is performed for the same line type based on that value (R suitable covering depth ff1) without performing the above operation.

Further, for different wire types, the optimum covering depth is determined by the above operation, and the stripping process is performed based on that value.

According to this liquid 1 cut suspension setting device, since it is configured to determine the optimal coating depth in the manner described above, the optimal coating depth is always determined with constant accuracy, regardless of the operator. This allows processing quality to be kept constant.

In addition, since the optimum depth of cut can be determined only by the above-mentioned operation, rather than the conventional one-to-Ryand machining method, the time required to find the optimum depth of cover can be shortened. , production efficiency is improved.

In the above embodiment, the coating depth setting means B determines the coating depth 1, but in addition to this, the cutter 2a,
The blade parts 3a and 3b of 2b cut the coated part 1b by the optimum coated cutting amount.
In the cut state (FIG. 4), the insulated wire 1 is moved back in the Q direction to strip the covering portion of the insulated wire 1. In other words, during the stripping process, the core wire 1a of the insulated wire 1, the cutter 2a,
It is also possible to detect a stripping error by detecting conduction/non-conduction between the conductor and the conductor 2b. That is, during the stripping process, the core wire 1a of the covered wire 1 and the cutter 2a,
2b, it means that the core wire 1a of the covered wire 1 was not in contact with the blades 3a, 3b of the cutters 2a, 2b, and the stripping process was performed successfully. This is confirmed. On the contrary, during stripping, the core wire 1a of the covered wire 1 and the cutters 2a, 2b
If conduction occurs even momentarily between the core 1 of the covered wire 1 and
11a and cutters 2a, 2b (7) blade portions 3a, 3b,!
: means that there has been contact, suggesting that a problem as shown in FIG. 6(b) may have occurred.

Therefore, by using the coating depth setting device B as a means for detecting stripping errors, it is possible to automate inspections that conventionally had to rely on visual inspection.

Further, in the above embodiment, conduction/non-continuity between the core wire 1a of the covered electric wire 1 and the cutters 2a, 2b is detected and the core 811a is
However, other electrical characteristics such as the core wire 1a of the rfi electric wire 1 and the cutter 2a due to the transition of the cutters 2a and 2b are detected.
2b and detects the change in capacitance between the core I! The presence or absence of contact between la and the blade portions 3a, 3b may be detected. For example, with the transition of cutters 2a and 2b,
Due to the steep change in capacitance, contact between the core wire 1a and the blade portions 3a, 3b can be detected.

Further, in the above embodiment, a case where the present invention is applied to a coating stripping device that strips one coated wire 1 at a time has been described, but in addition to this, a coating stripping device that strips a plurality of coated wires at a time is applicable. The present invention can also be applied to a stripping device, and in that case, the same effects as in the above embodiment can be achieved.

(Effects of the Invention) As described above, according to the sheathing cut hanging setting neck of J3 in the sheathing stripping device according to the present invention, while cutting the pair of cutters into the sheathing portion of the sheathed wire, the pair of cutters and the Detecting a change in electrical characteristics between the covered electric wire and the core wire,
Since the coating depth is set based on the cutting depth m of the pair of cutters when the change becomes steep, the optimum coating depth can always be determined with constant accuracy. , it is possible to maintain a constant processing quality, and
This has the effect of shortening the time required to find the optimal coating depth and improving production efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the coating depth setting device according to the present invention, and FIGS. 2 to 4 show the coating depth shown in FIG. 1 as the optimum coating depth determined by the setting device. FIG. 5 is a perspective view of a main part of a conventional coating stripping device, and FIG. 6 is a diagram showing an end portion of the coating removed by the coating stripping device. DESCRIPTION OF SYMBOLS 1... Covered electric wire, 1a... Core wire, 1b... Sheathing part, 2a, 2b... Cutter B...
Covering cut amount setting means Fig. 1 A, -r-- a Fig. 2 1b...Coating portion Fig. 3 2a, 2b...Cutter B...Coating cut; setting means

Claims (1)

[Claims] (1) Cutting the sheathing near the front end of the sheathed wire with a pair of cutters, moving the sheathed wire back in the cut state, and peeling off the front end of the sheathing from the cut position. In a sheath stripping device that performs a sheathing process, detecting a change in electrical characteristics between the pair of cutters and a core wire of the sheathed electric wire while cutting the sheathing portion of the sheathed electric wire with the pair of cutters; A coating cutting depth setting device for a coating stripping device, characterized in that the coating cutting depth is set based on the cutting depth of the pair of cutters when the change becomes steep.