JP2766927B2 - Standard-size cutting device for brazing material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a brazing material cutting device for cutting various brazing materials to a predetermined length.

[Prior Art] FIG. 5 is a schematic side view showing a conventional example of a fixed-size cutting device of this type of brazing material.

In the drawing, 1 is a brazing material, 2 is a transport roller for sending out the brazing material 1, and 3 is a pressure roller pressed against the transport roller 2.

 4 is a die and 5 is a cutter.

Reference numeral 6 denotes a drive motor for the transport roller 2, which rotates in the direction of arrow A. 7 is a rotating shaft of the drive motor 2, 8 is an arm attached to the rotating shaft 7, 9 is a link connected to the arm 8,
Reference numeral 10 denotes a rack bar fixed to the end of the link 9, and the rack bar 10 meshes with a gear 12 fixed to a rotation shaft 11 of the transport roller 2.

That is, a slider crank mechanism having the rotation shaft 7 of the drive motor 6 as a crank shaft is formed, and the transport roller 2 is rotationally driven by reciprocating the rack bar 10 as the slider.

Reference numeral 13 denotes a one-way clutch for restricting the transport roller 2 to rotate in only one direction.
13 prevents the transport roller 2 from rotating backward when the rack bar 10 returns.

With the above configuration, when the drive motor 6 is driven, the arm 8
And the connecting point 14 of the link 9 rotates in the direction of arrow A.

Here, when the connection point 14 moves from point a to point b in the figure,
Since the rack bar 10 moves in the direction of the arrow B, the conveying roller 2 rotates in the direction of the arrow C via the gear 12 to feed the brazing material 1. Since the movement amount from the point a to the point b is always constant, the rotation amount of the transport roller 2 is also constant, and as a result, the feed amount of the brazing material 1 is also constant.

Subsequently, the connecting point 14 moves from the point b to the point a in the figure to move the rack bar 10 in the direction of arrow D. However, since the one-way clutch 13 is provided on the transport roller 2 as described above, the driving force is The rotation is not transmitted, and the rotation of the transport roller 2 is temporarily stopped.

Here, triggered by the temporary stop of the transport roller 2, a control means (not shown) operates the cutter 5 to cut the brazing material 1 fed by a predetermined amount as described above.

[Problems to be solved by the invention]

However, according to the prior art having the above-described configuration, the amount of the brazing material to be sent out and the timing of cutting are kept constant by moving the crank, so that the connection portion is loosened during the movement of the crank and the gear meshes. As a result, there is a problem that backlash or slippage between the conveying roller and the brazing material occurs, resulting in inferiority in feeding, and an error in accuracy in the length of the cut brazing material.

Such accuracy errors accumulate and increase as the length of the brazing material becomes longer.

In view of the above problems, the present invention obtains a configuration in which the amount of brazing material sent out and the timing of cutting are fixed by a mechanism that does not cause deviation or accuracy error, and can constantly cut the brazing material without accuracy error, It is another object of the present invention to provide a brazing material fixed-length cutting device capable of performing accurate cutting even on a long brazing material.

[Means for solving the problem]

In order to achieve the above object, the present invention is to obtain the amount of brazing material to be sent out and the timing of cutting by a fixed mechanism that is easy to set the position.

That is, in the present invention, a brazing material is sent out by a pair of upper and lower rolls, and the brazing material is cut to a predetermined size. It is characterized in that a moving plate and a sensor for detecting the plate rotating by feeding the brazing material are provided, and cutting is executed when the sensor detects the plate.

[Operation] With the above configuration, the present invention is to send the brazing material from a pair of upper and lower rolls, rotate the plate at the tip end thereof, and at the time when the plate is sent out by a predetermined size, make the sensor detect the plate, The cutting of the one-dimensional brazing material can be executed using the detection of the trigger as a trigger.

〔Example〕

 Embodiments will be described below with reference to the drawings.

FIG. 1 is a perspective view of this embodiment, and FIG.
FIG. 3 is a view taken along line BB of FIG. 1, and FIG. 4 is a view taken along line CC of FIG.

In the figure, 1 is a brazing material, 14 is a transport roller for feeding the brazing material 1 in the direction of arrow E, and 15 is a pressure roller pressed against the transport roller 14.

Reference numeral 16 denotes a die, 17 denotes a cutter that moves in the direction of arrow F by a drive mechanism (not shown) to cut the brazing material 1, and 18 denotes a dispensing guide that conveys the cut brazing material 1 ′ out of the mechanism. Here, since the brazing material 1 has no spring property,
It is rotated 90 ° by 16 so that it can be inserted into the payout guide 18 in a vertical state.

Reference numeral 19 denotes a backing plate which comes into contact with the tip portion 1a of the brazing material 1 to be fed, and reference numeral 20 denotes a rotation axis of the backing plate 19.

Reference numeral 21 denotes a sensor for detecting the abutment plate 19 when the brazing material 1 is sent out by a predetermined size. The sensor 21 is constituted by a pair of light emitting and receiving elements.

With the above configuration, first, the conveying roller 14 is rotated in the direction of arrow G by a driving means (not shown), and the brazing material 1 is moved in the direction of arrow E.
Transport in the direction.

Here, the brazing material 1 is rotated 90 ° by the die 16 and enters the payout guide 18 in a vertical state.
And comes into contact with the contact plate 19, and the contact plate 19
Rotate in the direction.

When the brazing material 1 is sent out by a certain size, the abutment plate 19 also rotates by a certain amount, and the light reception of the sensor 21 is blocked.

When the sensor 21 detects the contact plate 19, the cutter 17 is driven by a driving means (not shown) using this as a trigger to execute cutting.

After the cutting, the payout guide 18 is rotated in the direction of arrow I in FIG. 4 to discharge the cut brazing material 1 'out of the mechanism.

In this embodiment, the brazing material 1 having a rectangular wire is shown as an example. However, the present invention is not limited to this, and can be applied to cutting brazing materials having various shapes such as a round wire and a trapezoidal wire.

Further, in this embodiment, the brazing material 1 is 90
゜ Rotated and guided in a vertical state to the payout guide 18, but the present invention is not limited to this, and in the case of a resilient brazing material, even if it is cut horizontally, there is no effect on its effect. I will not give it.

Further, when cutting the brazing material, both the case where the transport roller 14 is temporarily stopped and the case where the transport roller 14 is continuously operated can be performed.

As described above, we actually cut to a fixed size using a flat wire of 85 wt% Ag-Cu with a thickness of 0.08 mm and a width of 0.8 mm, and set the dimensional standard for the length to 137.2 ± 0.2 mm, and measured the dimensions for 5,000 pieces each. Upon inspection, the results shown in the following table were obtained.

As shown in the table, the size of defective products is 231
In contrast, the number of cut products according to the present invention was zero.

〔The invention's effect〕

As described in detail above, according to the present invention, the brazing material is sent out by a pair of upper and lower rolls, and the brazing material is cut into a fixed size by the brazing material cutting device. An abutment plate that rotates by abutting the tip and a sensor that detects the abutment plate that rotates by sending out the brazing material are provided, and cutting is performed when the sensor detects the abutment plate, so that position setting is easy. The amount of the brazing material to be sent out and the timing of cutting can be obtained by the mechanism fixed by the above.

Thereby, the present invention makes it possible to keep the feed amount of the brazing material and the timing of cutting with a mechanism that does not cause displacement or accuracy error, can always cut the brazing material without accuracy error, and have a long length. There is an effect of providing a fixed-length cutting device for a brazing material capable of performing accurate cutting even on a brazing material.

Furthermore, when cutting the brazing material, the cutting can be performed even while the transport roller is continuously operated, and the operation efficiency of the apparatus is greatly improved.

[Brief description of the drawings]

1 is a perspective view of this embodiment, FIG. 2 is a view taken along the line AA of FIG. 1, FIG. 3 is a view taken along the line BB of FIG. 1, and FIG. FIG. 5 is a schematic side view of a conventional example. 1 brazing material 14 transport roller 15 pressure roller 16 die 17 cutter 18 dispensing guide 19 plate 21

Claims (1)

(57) [Claims] A brazing material is sent out by a pair of upper and lower rolls, and the brazing material is cut into a fixed size. A fixed length cutting device for a brazing material, comprising: a backing plate; and a sensor for detecting the backing plate which is rotated by feeding the brazing material, and performing cutting when the sensor detects the backing plate.