JP3949806B2 - Wire rod end processing method and processing apparatus for wire drawing - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In a continuous wire drawing process using a plurality of dies for a metal wire material, when the wire material is not passed through the die, it relates to a device, a processing method, and a die drawing device that first process the wire material terminal so that the wire material can be passed through. It is.
[0002]
[Prior art]
Continuous wire drawing of a metal wire is usually performed by using a wire drawing machine having a capstan or a cone provided between a plurality of die holders and a die holder, winding the wire around the capstan, and then passing the die. It is wound around a capstan, and this is sequentially repeated, and the wire is drawn by a plurality of dies in order, and drawn. However, in order to perform this wire drawing, it is necessary to wire the wire in advance to a plurality of dies. For this reason, first, the end of the wire is thinned and then drawn, and the wire is passed through the first die. In the past, it has been carried out by the following method.
[0003]
One method is to use frictional heat generated between the fixture and the wire after the wire diameter is about 1.3 mm or less and the middle of the gripped wire is hooked on the fixture and the wire is slid with the fixture. The wire is heated and softened, and at the same time, the wire is passed through the die by thinning the wire with a tensile force. After that, the die is hooked on the die fixing jig, and the wire is pulled out to the next cone by human power. It is a way to connect.
[0004]
However, this method has a large work load because the work of sliding with a fixing metal fitting for thinning the wire and the work of pulling out to a predetermined length after passing through the tip of the wire are mainly performed manually. If the wire diameter of the wire is increased, the load of this wiring work is further increased. In addition, since the thinned wire portion is heated and its mechanical strength is reduced, when the portion is gripped and pulled out for a predetermined length, the wire is broken if the strength is less than the pulling force. There is a problem that it cannot be removed. As described above, the sliding operation of the wire and the drawing operation of a predetermined length are problematic in terms of safety because they involve an unexpected disconnection of the wire.
[0005]
The above-mentioned method of thinning a wire by sliding heating and drawing it to a predetermined length is very difficult to perform by human power, particularly when the wire diameter of the carbon steel wire is 1.3 mm or more. For this reason, there is a case where a method is adopted in which the butt stepped portion is smoothed with a file or the like and then pulled out after butt welding with a wire to be drawn having a diameter smaller than the die diameter. However, even in this method, since the butt portion is heat-treated, there is a possibility that the mechanical strength may be lowered, and the file hooking must be performed carefully so as to withstand the pulling force, which requires work and labor. It was.
[0006]
And, as a method generally used in a wire rod having a wire diameter of about 1.3 mm or more, the wire rod is inserted into a rolling roller die called a pointing machine to narrow the wire rod end, and then There is a method in which a wire end is passed through a die and drawn from a die holder to a capstan by using the power of a capstan using a drawing jig.
[0007]
However, this method requires an expensive pointing machine, and in order to reduce the diameter while maintaining the circular shape of the end of the wire with a rolling roller, the end of the wire is inserted when inserting the end of the wire into the rolling roller. These operations require extremely high skill because they are inserted while rotating the part and require repeated operations.
[0008]
[Problems to be solved by the invention]
The problem to be solved by the present invention is that in wire drawing of a metal wire material, the wire material is first reduced in the length direction in a safe and simple manner without causing a large labor load when the wire material is passed through a die. It is to provide a diameter reduction method and apparatus.
[0009]
Furthermore, it is an object of the present invention to provide a device that can be pulled out safely and easily without a large labor load in the operation of drawing the wire rod tip through a die to a predetermined length.
[0010]
[Means for Solving the Problems]
The present invention has been made in order to solve the above problems, and the first invention relates to a wire end processing method, the gist of which has an inlet larger than the wire diameter of the wire to be processed. A straight hole that gradually decreases in diameter as it goes deeper from the entrance is formed, and the straight hole includes a wire rod end insertion portion in which a wire rod protruding release portion is formed in the axial direction of the wire rod. A first step, a second step of inserting the wire to be processed into the linear hole while rotating, and a third step of cutting a side portion of the inserted wire protruding from the release portion by a sand belt. The present invention relates to a method of sequentially reducing the diameter of a wire rod terminal for wire drawing characterized by comprising a lengthwise direction.
[0011]
[Means for Solving the Problems]
The second aspect of the invention relates to a wire end processing apparatus, the gist of which is a linear hole having an inlet larger than the wire diameter of the wire to be processed and gradually decreasing its diameter as it goes deeper from the entrance. A wire end insertion portion formed with a wire end, a presser portion disposed opposite to the wire end insertion portion with a predetermined interval, and a sand wound between the drive portion and the support portion within the interval therebetween. A belt sander portion that rotates with a belt inserted therein, and the linear hole has a wire rod protruding release portion in the axial direction of the wire rod on the side facing the presser portion, and the sand belt is The present invention relates to a wire end processing apparatus for wire drawing, which contacts and cuts the side surface of the wire rod protruding from the release portion and sequentially reduces the diameter of the wire rod end in the length direction.
In addition, the 2nd invention can be characterized by the said releasing part being inclined and arrange | positioned with respect to the drive direction of the said sand belt.
[0012]
It should be noted that the wire whose diameter has been reduced as described above can be pulled out by a die drawing device. The gist of the die drawing apparatus is an apparatus for drawing a predetermined length by a die after inserting wire end portions successively reduced in the length direction into the die hole, and a die fixing portion provided in the base A rail part and a pulling drive part, and a wire terminal gripping jig is movably arranged along the rail in the rail part, and the wire terminal gripping jig is arranged with respect to the die fixing part. And a drive connecting portion that is moved along the rail by the pulling drive portion.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Here, a specific form of the apparatus for sequentially reducing the diameter in the length direction of the wire terminal according to the second invention will be described. The device comprises a wire terminal insertion portion, a pressing portion, and a belt sander. Has an entrance with a diameter larger than the wire diameter of the wire to be processed on the front surface, and the diameter gradually decreases as it goes deeper than this, and the release part protrudes in the longitudinal direction of the wire at the lower surface of the wire terminal insertion portion It is provided with the hole which has. The presser portion is arranged to face the lower surface of the wire terminal insertion portion with a predetermined distance and is fixed integrally with the wire terminal insertion portion.
[0014]
The belt sander includes a driving unit, a support unit, and a sand belt suspended from the driving unit, and the sand belt is rotated by the driving device. The drive unit and the support unit are coupled via a coupling unit. A part of the sand belt is disposed in a gap formed between the lower surface of the wire terminal insertion portion and the presser portion with the sand surface facing the lower surface of the wire terminal insertion portion. The belt sander connecting portion and the presser portion are connected and fixed.
[0015]
Next, the first invention will be described in accordance with this device. First, the belt sander is driven, and the sander belt continuously travels between the lower surface of the wire terminal insertion portion and the presser portion. Next, the wire end is inserted into the hole from the inlet, but since this hole is gradually reduced in diameter as it goes deeper, a part of the inserted wire protrudes outside from the open part on the lower surface of the wire end insertion part, and this part Is cut by a sander belt that travels. In that case, it can grind | polish uniformly in a wire peripheral direction by inserting it, rotating a wire. Then, by sequentially inserting and polishing the wire end to the back of the insertion hole, the wire end can be finally processed into a shape that is successively reduced in the length direction.
[0016]
In the above wire rod end processing method and processing apparatus for wire drawing, the work is almost automatically performed by machine work, so that workability is improved unlike conventional manual work. In addition, the work efficiency has been further improved.
[0017]
The wire whose diameter has been reduced as described above can be drawn with a die drawing device. A specific form of drawing a predetermined length after inserting the end of the reduced diameter wire rod end into the die hole is as follows. The gantry includes a die fixing portion, a rail portion, and a pulling driving portion, and a wire terminal gripping jig is arranged on the rail portion so as to be movable on the rail and back and forth. The wire terminal gripping jig has a jig for gripping the wire terminal on the surface of the die fixing part, and is provided with a drive connecting part for moving in the direction of the drive part by the pulling drive part.
[0018]
For this reason, the wire rod end inserted into the die hole fixed to the fixed portion grips the tip of the wire rod by the wire rod end holding jig, and then moves on the rail by the pulling drive portion. In this case, the wire is passed through the die hole. Since this device is not a conventional manual method, the working environment is extremely improved and the workability is improved.
[0019]
【Example】
Hereinafter, the second and third inventions of the present invention will be described in more detail with reference to examples.
First, FIG. 1 is an overall view showing a wire terminal processing apparatus according to a second aspect of the present invention for sequentially reducing the diameter of a wire terminal in the length direction, and FIG. 2 is a partially exploded view of the main part.
[0020]
In the figure, reference numeral 1 denotes a wire end processing apparatus, which includes a wire end inserting portion 2, a presser portion 3, and a belt sander-4. The wire end insertion portion 2 is provided with a hole 21, and this hole 21 has an inlet having a diameter larger than the wire diameter of the wire to be processed on the front surface of the wire end insertion portion 2, and the diameter gradually decreases as it goes deeper. In addition, a release portion 23 in which the hole 21 is released in the longitudinal direction is formed on the lower surface 22 of the wire rod end insertion portion 2. The groove diameter at the tip of the hole 21 is about half of the groove diameter at the inlet. The shape of the hole 21 may be V-shaped or semi-circular, and when the wire to be polished is disposed in the hole 21, from the lower surface 22 of the wire terminal insertion portion 2 toward the tip sequentially from the inlet of the hole 21. The hole 21 and the release portion 23 are provided so that the amount of protrusion is large.
The presser portion 3 is disposed to face the lower surface 22 of the wire terminal insertion portion 2 with a predetermined interval, and is fixed to the wire terminal insertion portion 2.
[0021]
The belt sander-4 includes a drive unit 41, a support unit 42, and a sand belt 43 suspended from them. The drive unit 41 and the support unit 42 are connected by a connecting unit 44. The sand belt 43 is disposed in a gap formed between the lower surface 22 of the wire rod terminal insertion portion 2 and the presser portion 3 with a part of the belt facing the lower surface 22 of the wire rod end insertion portion 2 with a sand surface thereof. The belt sander connecting portion 44 and the presser portion 3 are connected and fixed.
[0022]
The method of sequentially reducing the diameter of the wire end using the processing apparatus that sequentially reduces the diameter in the length direction will be described. The belt sander 4 is driven and the sand belt 43 is moved to the lower surface 22 of the wire end insertion portion 2. And the gap between the presser part 3 is continuously run. Next, the wire rod end is inserted into the insertion hole 21, and since the diameter gradually decreases from the insertion hole 21 toward the back, a part of the inserted wire rod protrudes from the release portion 23 on the lower surface 22 of the wire rod end insertion portion 2. As a result, the protruding portion is scraped by the sand belt 43 that travels. In that case, it can grind | polish uniformly in a wire peripheral direction by inserting it, rotating a wire. Then, by sequentially inserting the wire rod to the depth of the insertion hole 21 and polishing the wire rod, the wire rod terminal can be finally processed into a shape whose diameter is sequentially reduced in the length direction.
[0023]
FIG. 3 is an overall view showing a die hole drawing apparatus for a wire rod according to a third aspect of the invention, and FIG. 4 is a partially exploded view thereof. In other words, the wire rods that have been reduced in length in the length direction using the above-described wire rod end processing apparatus are passed through the die, and after inserting the wire rod end into the die hole, a predetermined length is pulled out. The apparatus has the following configuration.
[0024]
In the drawing, reference numeral 5 denotes a drawing device, and the drawing device 5 includes a gantry 6, a die fixing portion 7 provided on the gantry 6, a rail portion 8, a wire rod terminal holding jig 9, and a drawing driving portion 10. A wire rod end holding jig 9 is arranged on the rail portion 8 so as to be movable back and forth on the rail 8. The die fixing portion 7 includes a die installation groove 71, a fixing wall 72 for fixing the die when the wire is drawn, and a wire supply chamber 73. The wire supply chamber 73 is used to supply a lubricant when applying a lubricant in the drawing process. Functions as a saucer. The rail portion 8 is provided from the die fixing portion 7 to the drawing drive portion 9 in substantially the same direction as the drawing direction of the wire.
[0025]
The wire terminal gripping jig 9 is composed of a grip 91, a travel unit 93, and a drive suspension unit 94 on a carriage 91. The grip 92 is composed of two grooved gripping plates. By being provided on the side wall and screwed through the screw groove, the wire terminal can be gripped and fixed to the carriage 91. Further, by providing a wire rod passage hole on the rear wall surface of the carriage 91, the wire rod can be gripped at an arbitrary position of the wire rod end from the die of the wire rod that has been diced. This means that when drawing the rail length or more with a die, when the carriage 91 is returned to the die portion and grips the wire in the second and subsequent drawing, the already drawn wire is removed from the carriage 91. It can be sent backwards.
[0026]
The pulling drive unit 10 includes a drive connection unit 101 and a drive unit 102, one end of the drive connection unit 101 is connected to the drive suspension unit 94 of the wire terminal gripping jig 9, and the other end is locked to the drive unit 103. In this embodiment, the drive connecting portion 101 is a chain, and the drive portion 102 includes a gear and a lever that rotates the gear. By engaging the chain 101 with the gear and rotating the gear, the wire terminal gripping jig 9 is moved from the die fixing portion 7 along the rail portion 8 to the drawing driving portion 10 to draw the wire. Here, the driving force for rotating the gear can be changed by changing the length of the lever for rotating the gear.
[0027]
In the present invention, it is preferable to continuously use the wire end processing apparatus 1 for sequentially reducing the diameter of the wire end in the length direction and the wire rod drawing apparatus 5 for a predetermined length with a die. By providing the two apparatuses, two types of processing can be performed at the same place. In addition, by providing these devices on a movable carriage, the entire device can be moved, and wire rod dies can be threaded at different locations with one combination device.
[0028]
【The invention's effect】
Conventionally, the work of sliding with a fixing bracket for thinning the wire rod, which has been a heavy work load in the wire passing process to the die by human work, and hooking the die to the die fixing jig, the wire rod has a predetermined length The drawing operation can be omitted, and the wire passing process can be performed with a simple and inexpensive device.
[0029]
Furthermore, according to the present invention, since the wire is not heated or processed by a pointing machine or the like to reduce the wire, the mechanical properties of the wire are not changed, and the wire terminal during the wire passing operation Thus, the wire can be efficiently routed without disconnection even when the gripper is gripped and pulled out.
[Brief description of the drawings]
FIG. 1 is an overall view showing a processing apparatus for a wire terminal according to a second aspect of the present invention for sequentially reducing the diameter of a wire terminal in the length direction.
FIG. 2 is a partially exploded view of the main part of the apparatus of FIG.
FIG. 3 is an overall view showing a die hole drawing apparatus for a wire according to a third invention.
4 is a partially exploded view of the main part of the apparatus of FIG. 3. FIG.
[Explanation of symbols]
1 ... Wire end processing equipment,
2 ... Wire terminal insertion part,
21 ... Wire end insertion hole,
22... Bottom surface of wire rod end insertion part,
23 .. Opening part of wire rod end insertion hole,
3 ... Presser part,
4. Belt sander,
41 ... Drive unit,
42 ... support part,
43 Sand belt,
44 ... Connection part,
5. Drawing equipment,
6 ... Stand,
7. Die fixing part,
71 Die installation groove,
72 ... Die fixed wall,
73 ... Wire supply room,
8 Rails,
9 ... Wire terminal gripping jig,
91...
92 ... the gripping part,
93 ... Running section,
94 Drive suspension,
10 ... Pulling drive,
101 ... drive connection part,
102 ... drive unit,
103 ··· Drawing drive unit.

Claims (3)

  It has an inlet that is larger than the wire diameter of the wire to be processed, and forms a straight hole that gradually decreases in diameter as it goes deeper from the inlet, and the straight hole is in the axial direction of the wire. A first step including a wire end insertion portion formed with a wire rod protruding release portion, a second step of rotating and inserting a wire to be processed into the linear hole, and the inserted wire A method of sequentially reducing the diameter of a wire rod end for wire drawing in a length direction, comprising a third step of cutting a side surface portion protruding from a release portion with a sand belt. A wire rod end insertion portion having an entrance larger than the wire diameter of the wire to be processed and having a linear hole that gradually decreases in diameter as it goes deeper from the entrance, and a predetermined end in the wire end insert portion The presser part disposed opposite to each other with an interval, and a belt sander part that rotates by inserting a sand belt wound between the drive unit and the support unit into the interval between the two, hole forming the Jo is released portion protruding of the wire in the axial direction of the wire on the side facing the pressing portion is formed, the sand belt during rotation running, cutting it in contact with the side surface of the wire protruding from said releasing unit A wire end processing apparatus for wire drawing, wherein the wire end is sequentially reduced in the length direction. The wire release terminal processing apparatus according to claim 2, wherein the release portion is disposed to be inclined with respect to the driving direction of the sand belt.

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