JPH07115066B2 - Processing method of wire rod - Google Patents

Description

The present invention relates to a method for processing a wire rod using a roller die for continuously processing the wire rod.

[Conventional technology]

By passing the wire rod between a pair of rollers, wire drawing a wire rod having a non-uniform shape in the circumferential direction and the axial direction, and a roller die for drawing to a desired wire diameter, for example, Japanese Patent Publication No. 58-17686. Known are, for example, Kocho Sho 58-23449.

[Problems to be Solved by the Invention] The conventional roller die has the following problems.

If the processing roller can be finely adjusted in the thrust direction during operation by incorporating it into the line, it is possible to process the wire with high accuracy.However, with conventional roller dies, such fine adjustment during operation is structurally difficult. It was impossible.

Further, in the conventional roller die, the rollers are arranged so that the concave grooves of the respective rollers, which are located opposite to each other, are aligned with each other, so that the non-round wire material can be smoothly rounded by this roller die. Could not be processed.

As a result of various studies to improve the above-mentioned conventional drawbacks, the present invention has been improved so that the roller can be finely adjusted in the thrust direction during operation by incorporating it into a line. As a result of further research, the reason why the non-round wire cannot be smoothly processed into a perfect circle is that even if a pair of rollers are set in advance so that both ends of the concave grooves facing each other match. When the wire rod is passed between the concave grooves under a predetermined pressure, each roller receives the thrust load generated in the wire rod,
It was found that the cause was the displacement in the thrust direction. Therefore, in the present invention, the above-mentioned problems are solved by displacing the roller in a direction opposite to the displacement direction in advance, and this has been confirmed as a result of an experiment.

[Means for solving problems]

In order to achieve the above object, the wire rod processing method of the present invention is
A rectangular housing is constructed by combining four support blocks, and a pair of rollers having a groove on the outer circumference are arranged in the inner space of the housing with their axes parallel to each other, and a wire is passed between the grooves. Thus, in the method of processing a wire rod, one end of one roller shaft is supported by the one support block located at the opposite position, and the other end of the roller shaft is movably moved by fluid pressure through the other support block. It is supported by a roller axis direction pressing member provided, and one end of the other roller shaft is further supported by a roller axis direction adjusting screw provided penetrating one of the opposing support blocks, and the other end of this roller shaft is supported. The roller is supported by a roller axial pressing member that is movably provided by fluid pressure through the other supporting block, and the opposing roller is applied by a roller axial pressing member. According to the fluid pressure applied, the axial position of the roller is preliminarily displaced in a direction opposite to the direction in which the roller is displaced by an amount corresponding to the displacement of the axial position of the roller caused by the thrust load of the wire. To do.

[Action]

In the inner space of the housing, one side of the pair of rollers is fixed at a predetermined position by a roller axial pressing screw.
Next, a pressure is applied to one end side of the pair of rollers by fluid pressure, and the shaft of the rollers is displaced in the direction opposite to the direction in which the rollers are displaced by an amount corresponding to the amount of displacement of the axial position of the rollers caused by the thrust load of the wire rod. The direction position is displaced in advance and set.

Then, when the non-round wire rod is passed between the groove grooves of the pair of rollers, the roller is moved in the axial direction to be displaced by the thrust load generated in the wire rod, and the opposing groove grooves are aligned with each other. The wire rod can be processed into a perfect circle.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

The schematic structure of the roller die used in the present invention is shown in FIG.
As shown in FIG. 5, reference numeral 6 denotes a housing, which is formed by assembling a base block 1, a thrust block 2, a reduction block 3, and a preload block 4 into a quadrangle by a plurality of assembly screws 5. ing. In a space 7 formed inside each block of the housing 6, a pair of rollers 10 and 11 having a groove 8 on the outer circumference are arranged in parallel. Of the pair of rollers 10 and 11, one roller (lower roller in FIG. 2) 10 is a position reference roller and is fixed at a predetermined position, and the other roller (upper roller in FIG. 2). ) 11 is a moving roller that can be moved while finely adjusting in the axial direction and then fixed at a predetermined position.

More specifically, each roller 10, 11 is configured as follows. First, of the roller shafts 10a, 10a projecting to the left and right of the lower roller 10, the end of one roller shaft 10a (left side in FIG. 5) is supported inside the thrust block 2 via a thrust bearing 12. , The other roller shaft 10a
The tip end of is supported by a thrust adjusting block 16 disposed in the inner concave portion 15 of the preload block 4 via a thrust bearing 17. The back surface of the thrust adjusting block 16 is supported by the tip of a thrust preload screw 20 as a roller axial direction pressing screw screwed into a screw hole 18 that penetrates the preload block 4 inward and outward.

Therefore, by tightening the thrust preload screw 20, the lower roller 10 is firmly and rotatably fixed at a predetermined position in the thrust direction.

Further, the roller shafts 10a and 10a of the lower roller 10 are fitted with radial bearings 21 and 21 having outer races (outer rings), and the radial bearings 21 and 21 are arranged inside the base block 1. It is supported by receiver 19. Therefore, the load from above the roller 10 is supported by the roller receiver 19, the spacer 23, and the base block 1 via the radial bearing 21.

Next, each roller shaft 11a protruding left and right of the upper roller 11,
Each tip of the 11a is supported inside the thrust block 2 and the preload block 4 via a thrust bearing 24. That is, the thrust bearings 24, 24 are supported inside the thrust adjusting blocks 26, 26 movably provided in the recesses 25, 25 formed inside the thrust block 2 and the preload block 4, respectively.

Also, one thrust adjustment block 26 (left side in FIG. 5)
The rear surface of is pressed by the tip of a thrust preload screw 28 as a roller axial position adjusting screw that is screwed into a screw hole 27 that penetrates the thrust block 2 in and out. The rear surface of the other thrust adjusting block 26 (right side in FIG. 5) is provided with a thrust preload screw 28 as a roller axial pressing screw that is screwed into a screw hole 27 that penetrates the preload block 4 inward and outward. Pressed by the tip.

A radial bearing 30 having an outer race is fitted on the roller shafts 11a, 11a of the upper roller 11, so that the radial bearing 30 is pressed from above by a reduction screw receiver 31 arranged inside the reduction block 3. It is provided in. The back surface of the screw-down screw receiver 31 is pressed by the tip of a screw-down screw 29 as a roller screw axis right-angle direction pressing screw that is screwed into a screw hole 32 that penetrates the screw-down block 3 inward and outward. On the outer circumference of the head of the screw 29,
A scale 36 for displaying the rotation angle is attached.

The assembly sequence and operation of the roller die having the above structure will be described.

First, the thrust block 2 and the preload block 4 are assembled to the base block 1 by the assembly screws 5 and 5. next,
Rollers 10 and 11 are assembled in the respective blocks in the vertical direction, and then the pressure reducing block 3 is attached and fixed to the upper ends of the thrust block 2 and the preload block 4 by the assembly screws 5 and 5.

Then, the thrust preload screw 20 is tightened to rotatably fix the lower roller 10 at a predetermined position.

Next, attach the upper roller 11 to the left and right thrust preload screws.
Move 28, 28 to the left and right while relatively rotating it,
The upper and lower rollers 10 and 11 are fixed so that the positions of the concave grooves 8 and 8 facing each other are aligned with the thrust direction. Then, pass the wire to be processed between the concave grooves 8 and 8 facing each other,
Then, the pressing screw 29 is operated to adjust the pressure applied to the wire by the upper and lower rollers 10 and 11. At this time, the screw 29
If the rotation position is adjusted by the rotation angle display scale 36 provided on the outer circumference of the head of the head, the amount of reduction of the roller 11 can be easily and finely adjusted.

Further, each block constituting the housing 6 and the roller receiver
19 and the screw-down screw receiver 31 are provided independently of each other, so that the housing 6 and the roller receiver 19 and the screw-down screw receiver 31 have high rigidity.
The twist with 31 is small. In addition, radial bearing 2
Outer races are attached to 1,30, so roller holder
It is possible to prevent spalling from occurring in 19 and the screw-down screw receiver 31, and the roller shake during one rotation during operation is small.

In FIG. 2, reference numeral 38 is a lubricating oil guide groove formed on the side surface of the preload block 4, the side surface of the reduction block 3 and the side surface of the reduction screw receiver 31.

By the way, the cross section of the wire to be processed by the roller die is generally circular, but the cross section of the wire before processing is non-circular, for example, the cross section of the two semi-circles is not true when the two ends are displaced from each other. It may be circular.

The present inventor has found the following as a result of research on how to draw out a non-round wire in a perfect circle. That is, when a wire rod is passed between the recessed grooves 8 of the pair of rollers 10 and 11, the thrust load generated in the wire rod is applied to the pair of rollers 10 and 11 in the thrust direction and in the reverse direction. The force to move it to each roller 10,1
In the gap between the bearing and other supporting members that support 1,
The rollers 10 and 11 are moved by a very small amount in the thrust direction and in the opposite direction. Therefore, it was found that the pair of mating concave grooves 8 and 8 which were initially set to have a perfect circular shape were deformed by moving in the thrust direction and in the opposite direction, and the wire rod could not be processed into a perfect circle.

The present inventor has conducted further research based on the above findings, and as a result, the roller receives a thrust load generated in the wire rod.
Considering beforehand the amount of displacement of 10 and 11 in the thrust direction and in the opposite direction, it was considered to initialize the rollers 10 and 11 to the positions moved in advance in the opposite direction to the displacement amount.

When wire drawing was performed by passing a perfect circle wire through the rollers 10 and 11 having the positions set in this way, the thrust load generated in the wire causes each of the rollers 10 and 11 to be in the thrust direction, and the first displaced direction. It was confirmed that the wire rod was displaced in the opposite direction, and as a result, a wire rod having a non-round shape was machined and pulled out in a true circle state.

Further, in this case, it was also confirmed that the relative displacement of the roller was small even when the cross-sectional shape of the wire was changed because the thrust bearing having sufficient rigidity was arranged in this device.

FIG. 6 is a cross-sectional view of a roller die according to a specific embodiment of the present invention. Parts common to those of the first embodiment shown in FIG. However, only different parts will be described.

In FIG. 6, reference numerals 40 and 41 are pipes connected to a pressure generation source (not shown) and for supplying oil or air. Further, 42 and 43 are holes formed in the preload block 4 for the passage of oil or air. This hole 42,43
The pipes 40 and 41 are connected to the outer ends of the.

On the other hand, inside the preload block 4, the flow holes 42, 4
Inner recesses 15 and 25 are provided so as to communicate with 3, and thrust adjusting blocks 46 and 47 as roller axial direction pressing members having O-rings 45 fitted on their outer circumferences are provided inside the recesses 15 and 25. It is movably provided. Then, by applying hydraulic pressure or air pressure to the rear surface of the thrust adjusting blocks 46, 47 through the pipes 40, 41, the front surface of the thrust block 46, 47 supports one shaft tip of each roller 10, 11. It is possible to press the thrust bearings 17, 24,
Instead of the thrust preload screws 20 and 28 shown in FIG. 5, the rollers 10 and 11 can be fixed by fluid pressure in the axial direction without shaking.

As described above, when the preload of the roller shaft is hydraulic or pneumatic, there are the following advantages over the screw type.

The screw type requires a tool such as a wrench and screwing in to adjust the roller, but hydraulic and pneumatic pressure requires only valve operation and switching, and operability is good.

When adjusting the position of the roller in the thrust direction, it is necessary to adjust the screws on both sides in Fig. 5, but according to hydraulic pressure and air pressure, adjustment of only one screw is sufficient and operability is good.

The screw type requires a torque wrench to apply a constant load to the roller shaft, and it is difficult to apply an appropriate amount of pressure, but if it is hydraulic or pneumatic, it is easy to operate because it only applies a constant pressure while looking at the pressure gauge. .

Structurally, the thrust adjusting blocks 16 and 26 shown in FIG.
It is only necessary to cut the O-ring groove and install the pipes instead of the preload screws 20 and 28, and there is no major structural change, and it can be easily hydraulic or pneumatic type.

In addition, as shown in FIG. 7, the roller dies 33 are arranged in parallel by shifting the respective arrangement angles by 90 ° to form a roller die device 34, and wire rods are provided between the roller dies 33, 33 ,. By passing it through, this wire can be gradually drawn in multiple stages. In addition, in FIG.
35 is a connecting bolt, which is inserted into the holes 37, 37 formed in the base block 1 and the reduction block 3 of the roller die 33,
By screwing nut 38 onto the tip, each roller die
33, 33 are joined together.

〔The invention's effect〕

According to the present invention, the position of the upper and lower rollers in the thrust direction can be finely adjusted while the roller die is installed in the line and during operation, and the wire can be drawn more smoothly. In addition, each roller can be operated in a state in which the groove is displaced so that a load is applied in the roller axial direction by the fluid pressure. Further, the position of the concave groove can be finely adjusted by the balance of the supply force of the fluid applied to the shaft end of each roller, and the wire rod can be smoothly expanded and contracted into a perfect circular shape.

In addition, the housing of each roller die can be disassembled without cutting the wire rod with the roller die device built in the line, and it is possible to easily replace the roller and the bearing while passing the long wire rod, It is possible to smoothly perform wire drawing work.

[Brief description of drawings]

1 is a plan view showing a schematic structure of a roller die according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a side view thereof, and FIG. 4 is a sectional view taken along line AA of FIG. 1 is a sectional view taken along line BB of FIG. 1, FIG. 6 is a sectional view of a roller die according to a specific embodiment of the present invention, and FIG. 7 is an example of a roller die device using the roller die of the present invention. It is a side view shown. 1 ... Base block, 2 ... Thrust block, 3 ...
… Rolling down block, 4 …… Preload block, 6 …… Housing, 7 …… Space, 10,11 …… Roller, 10a, 11a ……
Roller shaft, 12 …… Thrust bearing, 16 …… Thrust adjustment block, 29 …… Screw down screw, 33 …… Roller die.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiro Endo 2-1, 1-1 Nishishinjuku, Shinjuku-ku, Tokyo Japan Metal Industry Co., Ltd. (56) References Sho 63-150707 (JP, U)

Claims (1)

[Claims] 1. A rectangular housing is constructed by combining four support blocks, and a pair of rollers having a groove on the outer circumference are arranged in the inner space of the housing with their axes parallel to each other. In the method of processing a wire rod by passing a wire rod between the one end, one end of one roller shaft is supported by the one support block located opposite to the other, and the other end of the roller shaft is fluidized through the other support block. The roller is supported by a roller axial direction pressing member that is movably provided by pressure, and one end of the other roller shaft is supported by a roller axial direction adjusting screw that penetrates through one supporting block that faces the roller shaft. The other end of the shaft is supported by a roller axial direction pressing member that is movably provided by fluid pressure through the other supporting block. By the fluid pressure applied via the roller, the axial position of the roller is preliminarily displaced in the direction opposite to the direction in which the roller is displaced by an amount corresponding to the displacement of the axial position of the roller caused by the thrust load of the wire. A method for processing a wire rod, which is characterized in that