JPH0299238A - Method and apparatus for cutting wire for vertical mirror finished surface - Google Patents

Abstract

PURPOSE:To obtain a wire having a mirror-finished end face actually vertical to the axis and free from burrs by cutting the wire in the direction of a prescribed angle and while pressing the wire strongly to stopper pin for supporting the wire when the wire is cut. CONSTITUTION:First, the wire A is transferred as far as it comes in contact with a stopper pin 8, then, an oscillating clamp plates 8a, 8b are closed to hold the wire A under strong pressure. Then, a clamp operating cylinder 61 is actuated to bring the wire A into pressure contact with the stopper pin 8 through the resilence of a pressure adjusted spring 62. While this state is held, both cylindrical 19, 29 for opening or closing dies are operated to shut both opening and closing dies 2, 4 on the moving side and the fixed side to hold the wire under strong pressure. A cylinder 42 is actuated under this state, a moving unit 30 is moved to the front of the machine frame, consequently, a die unit 10 on the moving side is moved forward to cut the wire A.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is mainly applicable to the industrial field of application, especially when the diameter is about 5zz or less, especially about 0.2z.
For example, rollers for roller bearings, guide bottles and bearings used in various precision instruments are cylindrical bodies suitable for shafts, etc., and hexagonal cylinders and hexagonal cylinders that also serve as a rotation stopper. A cutting method for cutting a wire rod as a material for manufacturing a prismatic tree that can be used as a planting bin or a rotating shaft into a shape in which the cut end surface is substantially perpendicular and mirror-like; It relates to the apparatus used to carry out the method.

<Prior Art> Conventionally, in the manufacturing method and apparatus for this type of roller material and bottle material, in order to obtain a column whose length in the axial direction is long compared to the diameter of the material, there is a method for cutting the wire material. In the case of a short column whose length in the axial direction is shorter than the diameter of the product, a method of punching it out using a sheet-like material is taken.

<Problems to be Solved by the Invention> Among the above-mentioned conventional techniques, the former wire cutting means simply breaks the wire as a material such as piano wire, so the cut end surface is rough and the cutting direction is rough. Bearings that have curvature on the rear side and cannot be cut at right angles to the axial direction, so the cut end surface must be at right angles, without curvature, and have a mirror-like surface. In order to make it usable as a planting bottle or rotating shaft for use in industrial rollers, various precision instruments, etc., a longer length than a predetermined length is formed in advance, and then both end surfaces are Ken F each! ! ! ! It was necessary to perform post-processing to remove the curvature by polishing it using a machine, and at the same time to make it perpendicular. In addition, if this post-processing is to form a small roller with a diameter of 1zz and a length of 1.5zi in the axial direction, extremely perpendicularity is required. There was a problem that there was no colander.

On the other hand, in the method of punching out f& sound sheet material, if a sheet or plate material whose front and back surfaces are mirror-finished in advance is used, mirror-like surfaces can be obtained on both the front and back end surfaces. The circumferential surface of the punched material will be rough, and even if a precision die is used, burrs will gradually form on the back side of the punched material.If this burr removal process is not performed, it cannot be used as a precision material. In some cases, as described above, for example, a diameter of 1 zm and an axial direction of 15 shoulders,
There was a fundamental problem in that it was impossible or extremely difficult to obtain a material that was larger in the axial direction than the diameter, and the punched peripheral surface would be rough.

Therefore, in order to solve such conventional problems, the present invention utilizes the former technique of cutting wire rods, and also applies not only to wire rods that are long in the axial direction relative to the diameter of the wire rod, but also to cutting wire rods that are long in the axial direction relative to the diameter of the wire rod. Even if the axial direction is short compared to the diameter, the end face is substantially perpendicular when viewed under a microscope, there is no bending when cutting, and the cut end face is mirror-like. It is intended to be obtained through a single process of cutting.

Means for Solving the Problem> The structure of the method of claim (2) of the present invention for achieving the object will be explained using FIGS. 1 to 11 corresponding to the embodiments. , press each other and wire rods (A)
Two pairs of cutting dies (1>
, (2), (3), (4), and the wire rod (A
) and a stopper pin (8) that supports the end face of the wire rod (A). 4) On the cutting plane relative to the cutting plane (C), the wire rod (A)
The center line (S) in the feeding direction is centered at 1°20' with respect to the right angle (r) passing through the cutting center point (1'). t 3
The wire rod (
A) is supplied and the wire rod (A
) is strongly pressed against the stopper bin (8), while the movable molds (1) and (2) are moved relative to the fixed molds (3) and (4) for cutting.

Furthermore, the invention of the device of claim (2) is such that the pair of movable molds (1) and (2) that sandwich the wire rod (A) to be cut is r#
Jr'A freely held movable mold unit (10)
is installed movably relative to the fixed side mold unit (20) which holds the fixed side molds (3) and (4) so as to be openable and closable, and the -4 of both these units (10) and (20) , move along the center line (S> in the feeding direction of the wire rod (A) whose angle can be freely adjusted within the range of a receding angle of 50' to 1°50', and press the wire rod (A) against the mold. A compression clamp (6) is disposed, and a stopper pin (8) supporting the end face of the wire rod (A) is attached to the movable side mold (]), (2) so that the tip thereof can be freely adjusted in the deep and shallow directions. Detailed lecture on wire rods (1b)
, (2b), and the movable mold unit (1
0) is configured to move synchronously in the same direction with the cutting action movement.

The device invention of claim (2) is a right-angled mirror cutting device for a wire rod having the above-mentioned configuration, which further includes a movable mold unit (10
) is configured to have means (52), (54) for pressurizing and moving the stopper pin (8) toward the inner depths of the movable molds (1), (2) during the cutting action movement of the movable molds (1), (2). be.

<Function> Since the present invention has such a configuration, the wire rod (A) is supplied into the molds (1 to 4) from one end, and the wire rod (A) is attached to the stopper pin (8) by a compression clamp. Move the movable mold unit (10) to cut the wire (A) while applying strong pressure to
) is obtained.

<Example> Embodiments of the present invention will be described below based on the drawings.

In the drawings, FIG. 1 is an overall plan view showing the first embodiment of the device of the present invention, FIG. 2 is an overall front view with a part of the device located at the front removed, and FIGS. 3 to 5 are It is a figure showing the structure of a mold part. Further, FIG. 6 is a diagram of the stopper plate section, and FIGS. 7 to 11 are schematic diagrams showing the movement of the main parts over time.

The illustrated device is a hydraulic device in which each part is operated using hydraulic pressure as a power source.

For convenience of explanation, five points will be explained from the overall device structure.

In Figures 1 and 2, starting from the right side, the wire material (
A〉 is fed towards the left side. The underframe (41) has a material feeding chuck (7) on the right side for holding the wire rod (A) and supplying it to the mold described later, and a cylinder for moving the material feeding chuck (7) toward the left side. (71) is placed. Next, on the center side, there is a clamp plate (6b) that opens and closes in the front and back direction by an opening/closing cylinder (not shown) installed on the back, and (6b) is closed to hold the wire (A) under strong pressure and hold it against the mold. A wire compression clamp (6) that applies strong pressure is arranged, and a compression clamp operation cylinder (61) attached to the right outside of the underframe (41) is used to control the pressure adjustment ring (62), the connection lever <63), and the vertical It is intended to move to the left through the frame (64).

Approximately in the center of the underframe (41), there is a movable mold unit (1
The mold holding frames (11) and (21) of the mold holding frames (11) and (21) of the fixed mold unit (20) and the fixed mold unit (20) are arranged adjacent to each other.

The movable mold unit (10) is connected to the movable base <31> disposed on the left side thereof, forms a part of the movable unit (30) including each part installed above it, and is attached to the underframe. (4
1) moves in the front-rear direction by a cylinder (42) that expands and contracts in response to pressure oil from a main hydraulic cylinder (40) located at the rear of the main hydraulic cylinder (40).

On the moving table (31) of the moving unit (30), in addition to the moving side mold unit (10), a wire rod end face stopper pin (8) shown in FIGS. 7 to 11, which will be described later, is held. A bottle pressing moving table (51) is arranged to be movable in the axial direction of the stopper pin (8). On the bottle pressing moving table (51), there is an angle-adjustable gold plate 53 which holds a bottle compression stopper plate (52) on the left outer end surface.
are fixed so that the angle can be adjusted (Fig. 1), stopper pin holder (81), same holding frame (82), size adjustment stopper (83), bottle extrusion Ji adjustment bolt (84),
A bottle extrusion cylinder (85) is provided.

The bottle compression stopper plate (52) includes a first
As shown in Figure 6, the back side of the machine base has a gently sloped surface (52a) that slopes slightly toward the outside (left side in Figure 1), and a slope from the rear end corner (52c) to the rear side of the machine base. Steep slope (52b) that slopes seven colors toward the inside of the machine (right side in Figure 1)
It has a shape with a steeply sloped surface consisting of.

On the outermost left side of the underframe (41), an upright frame (55) is connected in a row so as to be movable and adjustable in the front and back direction, and a pressing roller that rotates via a vertical axis (54a) is mounted on the upper surface of the upright frame (55). (5
4) is rotatably mounted, and its outer peripheral surface is brought into contact with the gently inclined surface (52a) of the bottle compression stopper plate (52), and the wire rod (A) is cut by the molds (1 to 4). Immediately after, the rear end corner (52c) of the gently inclined surface (52a)
Adjust the position so that the contact is released.

As shown in Fig. 5, the mold is a moving side fixed mold (1).
, the same opening bolt (2), the fixed side fixed mold (3), and the opening/closing mold (4) are formed by 2 pairs of 4 block molds, and the central part of each opposing surface is made of cemented carbide. chip (Ia~4
a) is fitted and integrated, and is used for holding wire rods (To ~ 4b)
is formed. In addition, among these mold blocks, the fixed side opening/closing mold (4) has the wire clamping groove (4b).
A discharge port (5) for the cut wire (product) is formed through the back of the machine (the front side of the machine in the assembled position).

In these mold blocks, as shown in FIG. ) and the fixed side mold holding frame (21) so that their sides are in contact with each other, and the outer surface of each mold is held by the mold holding mold (19).
a) , (19b) and (29a) , (29b)
It is held in place to restrict lateral and outward movement.

As shown in FIG. 3, the movable mold <1) and (2) are
The U-shaped notch (ll) of the movable mold holding frame (11)
a), and the fixed mold (1) is fitted into the holding frame (11).
The opening/closing mold (2) is directly fastened with bolts (14) to the opening/closing mold holder (14), which is disposed on the front side (right side in Fig. 3, front side in the overall assembly posture) of the holding frame (11).
3) is secured with a bolt (15).

The opening/closing mold holder (13) is attached to a mold opening/closing moving frame (18) equipped with an adjustment bolt (16) for setting the opening/closing date (,) between the molds (1) and (2). One end is fixed, and the rods (12) are passed through the holding frame (11) and connected to the other ends of two rods (12) arranged above and below.

In this way, the movable mold unit (10) is formed.

As shown in FIG. 1, the mold opening/closing moving frame (18) is provided with a seesaw lever (17a) for moving the moving side mold opening/closing hydraulic cylinder (19) in and out. One end of the lever (17b) is attached, and the same cylinder (
By moving in and out of rods (19), rods (12) and (12)
), a mold holder (13), and a bolt (15) so that the movable fixed mold (2) is spaced apart from and brought into contact with the fixed mold (1).

Fixed side mold ('l), (4) is fixed side mold holding frame (21
) The structure of the stationary mold unit (20) incorporated into the movable mold unit (10) is also formed in the same manner as the movable mold unit (10).
Parts corresponding to partial codes (11) to (19>) are given partial codes (21) to (29).

The opening and closing movement of the opening/closing mold (4) in the fixed side molds (3) and (4) is performed by moving the hydraulic cylinder (29) for opening and closing the fixed side mold (29) shown in FIG. (27a
), transmission lever (27b), moving frame (28), rod (
22), (22), the mold holder (23) and the fixing bolt are used to transmit the information so as to separate from and contact the fixed mold (3).

As shown in FIGS. 7 to 10, the stopper pin (8) is inserted into the movable mold (1) from the opposite side (left side in the figure) of the stationary mold <3) and (4).

The length of the wire (A) to be cut is set by the protruding amount between the opposed wire holding grooves (1b) and (21+) of (2).

The diameter of this stopper pin (8) is slightly smaller than the diameter of the wire rod (A) to be cut, for example, the wire rod (A).
) is lzz diameter, the bottle diameter is 0.95 to 0.98i+
It is written as +w. By this, molds (1), (2
) so as not to impede the clamping pressure of the wire rod (^).

As shown by the chain line in FIG.
) and the fixed side molds (3), (4) relative movement cutting plane (C), the wire rod (A)
The supply direction center line (S>) is offset backward by an angle (α) with respect to a right angle (r>) passing through the cutting center point (P).

The angle (α) may vary from 50' to 1°50' depending on the wire diameter, hardness, cutting pressure, cutting speed, etc. of the wire to be cut (A). This allows for adjustments to be made within the unit. In the machine of the example, when the wire (A) is a piano wire with a wire diameter of 1 am, the angle (α) is set to 1°20
By setting the angle to , the perpendicularity of the cut end surface can be guaranteed. Further, with the machine of the embodiment, the cut end surface can be formed at a substantially right angle within the range of 1° 10' to 1° 30' when using other wire rods having different diameters and materials.

To cut the wire rod (A), as shown in Figs. The wire rod (A) is transferred by the feeding chuck cylinder (71) until it comes into contact with the stopper pin (8) (Figs. 7 to 8), and then the rocking crank 1 plate (6b) is opened and closed by a clamp cylinder (not shown). , (6b) to forcefully clamp the wire (A), actuate the clamp operation cylinder (61), and use the elastic force of the pressure-adjusted spring (62) to clamp the wire (A) to the stopper. While maintaining this state, operate the mold opening/closing cylinders (19) and (29) to open/close both the movable side and the stationary side. The molds (2) and (4) are closed to hold the wire rod (A) under strong pressure (911th step).

In this state, the moving mold unit <10> is moved forward by operating the cylinder (42) (Fig. 1) and moving the moving unit (30) towards the front of the machine. Perform the cutting operation of the wire rod (A) (10th
figure).

When the moving mold unit (10) moves forward to cut the wire (A), the gently inclined surface (52a) of the pressure roller (54) and bottle compression stopper plate (52) shown in FIG. ), the stopper pin <8> moves by the amount of inclination of the gently sloped surface (52M).
Compress the end face of A). At the position where cutting of the wire rod (A) ends, the pressing roller (54) is located at the rear end corner (52c) of the same plate (52>), and the next moment both <54>
, (52) are released and the compressive force is released, the movable side molds (1) and (2) move further, and the cut wire rod (product B) is transferred to the fixed side opening/closing mold ( Move until it reaches the position of the outlet (5) formed in 4) (Fig. 10)
.

Due to this confusion, the movable opening/closing mold (2) moves in the opening direction to release the product (B), and at the same time, the cylinder for pushing out the bottle (85) shown in Fig. 1 operates and pushes the stopper pin (8). Move the fixed side metal ff1 (3), (4) direction, product (B)
(Figure 11).

In this case, the bottle holder (81) itself may be used as a cylinder to directly extrude the pink 8).

At this time, at the same time, air is supplied to the pipe (9h) from the air supply pipe (9c) connected in the middle of the product transfer guide pipes (9a) and (9b), one end of which is attached to the discharge port 5>. (B) is suctioned, transferred, and collected at a predetermined position.

FIG. 12 shows another embodiment, in which the bottle compression stopper plate (52) in the previous embodiment is on the fixed side, and the bottle pressing roller (54) is attached to the bottle ejection/removal cylinder (8) attached. 81) It has a structure that is attached to the side. Even in this case, the angle of inclination of the gently inclined surface (52a) and the corner (52c) of the plate (52)
It goes without saying that the adjustment of the contact release position with respect to the roller (54) can be performed accurately.

The embodiment shown in Fig. 13 is a bottle compression stopper plate (
52), which shows another embodiment of the gently sloped surface (52).
After forming a concave portion (52cl) at the end portion of a) to release the contact with the roller (54), the gently inclined surface (52
The protruding surface (52e) protrudes slightly outward from the terminal end of a).
), and the roller (54) contacts the protruding surface (52e) to cut the Iftrf& product (El) by the bin (8) into the movable mold (1), (
2) can perform the extrusion function in the fixed side molds (3) and (4) directions. At this time, to make it easier to set the time lag, use the product ([
It is preferable to set the position of the discharge port (5) in 1) at a position away from the cutting action position.

In the embodiment shown in FIG. 13, a hollow wire (pipe) is used as the wire (A) to be cut, and when cutting the hollow wire (A), a stopper pin ( 8) has a small-diameter protrusion (8a) connected to its tip to fit into the hollow hole of the hollow wire (A), and its tip is connected to the cut surface (C) of the wire. It has a length that reaches

The reason why the stopper pin (8) is moved to extrude the product (8) after cutting the wire rod (A) shown in the above example is because the product (B) is placed in the molds (1) and (2). This is because there are cases where the particles adhere and cannot be reliably collected only by suction with air. Therefore, the action of pushing out the product (B) by the stopper pin (8) is not necessarily necessary.

Moreover, the reason why the stopper plate for bottle compression (52> shown in each of the above embodiments is compressed and moved when cutting the wire rod (A) is that the wire rod itself cut by the compression of the stopper pin (8) This is to allow the cut end surfaces of the wire rods (B) and the cut end surfaces of the wire rods (A) to perform a mutual polishing action without being pressed against each other, thereby simultaneously finishing the cut end surfaces of the product (B) and the cut end surface of the residual wire (A) into a mirror-like finish. The reason why the compression action is released immediately after cutting is to prevent the end face of the cut product from sliding against the mold, causing damage and wear.

The present invention can be implemented as follows.

In the above embodiment, a hydraulic device is used as the power source, and each part is operated by cylinder drive. However, a motor is used as the power source, and each part is operated by mechanical action such as a cam or crank. Alternatively, it may be implemented as a device that uses a combination of mechanical drive partially utilizing cylinder drive and hydraulic drive.

The wire to be cut is not limited to piano wire, but may also be stainless steel wire, iron wire, copper wire, brass wire, aluminum wire, or other metal wires, and is not limited to circular wire, but may also be square wire, hexagonal wire, hexagonal wire, etc. A rectangular wire may be used, and it is not limited to a solid wire.
As shown in FIG. 3, a hollow (pipe-shaped) wire rod may be used.

Each of the molds (1 to 4) is shown as having a cemented carbide chip (la to 4a) embedded in the opposing central part, but a cemented carbide chip (la to 4a) is embedded in the mold body. For example, form it into a dovetail shape and make it replaceable.
The wire rod (A) may be replaced with any wire rod according to the diameter, or the entire mold may be made of cemented carbide.

In addition, in the above embodiment, the mold (2) on the front side of the machine base is
), (4) are shown as molds that open and close, but the fL mold on either the front or rear side may be opened and closed, or both may be opened and closed together.

Similarly, the cutting movement direction of the movable mold is not limited to only the front direction with respect to the machine stand, but may be made to cut and move toward the back side.

Collection of the cut wire rod (product) is not limited to just taking it out to the side as in the above example, but the movable side opening/closing mold (2) is opened wide after cutting the wire rod, and the wire rod (product) is collected by its own weight or by air from above. Alternatively, a method may be taken to drop the product (B) downward and collect it, such as by spraying it with water. Even at this point, the product (B) can be held in the mold by the stopper pin (8).
1), (2) Recovering can be ensured by taking out the material from the tank.

Feeding the wire rod (A) into the molds (1 to 4) does not necessarily require a material feeding chuck (7) exclusively for feeding, but can be carried out only by the compression clamp (6) by adjusting the stroke and compression pressure. You may also do so.

Further, although the pin pressing roller (54) is used to reduce wear, a non-rotating sliding member (mere protrusion) may be used in place of the roller.

<Embodiment> Using a copper wire (A) with a wire diameter of 1.21 Jl, compression crank 1
(6) with a compression pressure of 50% on the stopper pin (8) and an axial length of 0.8 using the device of the first embodiment.
Manufacture 5,000 pillar-shaped objects (Product B) of Shoe 1, and randomly take the equivalent of about 500 to 1,000 out of these to an official inspection agency, and choose from among them for official inspection. The organization removed 10 items of their choice and subjected them to microscopic examination.
The cut end surfaces of all of them are at right angles on both sides, and there is no turning.
I received an inspection report that the surface had become mirror-like.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structure of these embodiments. It can be implemented with appropriate modification within the scope of achieving the following effects.

<Effects of the Invention> As is already clear from the above description, the present invention has the advantage that when cutting a wire with two pairs of cutting dies, the wire is not cut in a direction perpendicular to the axial direction, but cut at a predetermined angle. Since the wire rod is cut in the direction in which the wire rod is held, and the wire rod is cut while keeping the wire rod under strong pressure against the stopper pin for supporting the wire rod, the wire rod can be cut substantially at right angles. Moreover, the cut end surfaces of the wire rod can be finished into a beautiful mirror-like cut surface by strong friction between the cut end surfaces, and a cut wire rod can be obtained in which the cut end surfaces are at right angles and have a mirror-like finish without curling. I was able to do this.

Moreover, in the case of the present invention, it is possible to arbitrarily set and form the diameter of the wire material, whether small or large in the axial direction, by positioning and setting the insertion depth of the stopper pin into the mold.

In particular, the products (cut wire rods) obtained by the present invention have the remarkable effect that even minute products can be mass-produced extremely efficiently since they do not require any shaping after cutting. ing.

(8) is the stopper pin, (10) is the movable mold unit, (20) is the fixed mold unit, (5Z) (
54) is means for pressure transfer, (A) is a wire, (C) is a cut surface, (P) is a center point, (r) is a right angle line, and (S) is a center line.

[Brief explanation of the drawing]

Figures 11J to 11 show the first embodiment of the present invention, where Figure 1 is an overall plan view of the device, Figure 2 is a partially omitted front view, and Figure 3 is a mold. A side view of the unit part, No. 4I21 is a central longitudinal sectional front view of the mold part, Fig. 5 is a perspective view of the mold, Fig. 6 is a partial plan view of the stopper plate part, and Fig. 7 is a central cross-sectional plane of the main part. 8 to 11 are explanatory diagrams showing changes in the circumferential portion over time, and FIGS. 12 and 13 are partial cross-sectional plan views of main parts showing other embodiments, respectively. Symbols (1) and (2) in the figure are the moving side molds, (1b),
(21+) is the wire clamping groove, (3) and (4) are the fixed side molds, (6) Figure 10 Figure 11

Claims (1)

[Claims] [1] Two pairs of cutting dies (1), (2), (3) on a movable side and a fixed side that press against each other and hold the wire (A) between them.
, (4), a compression clamp (6) that presses the wire rod (A) against the mold, and a stopper pin (8) that supports the end surface of the wire rod (A). ), (2) and the stationary molds (3), (4) on the cutting plane relative to the cutting plane (C), the feeding direction center line (S) of the wire rod (A) is set at the cutting center point ( 1 for the right angle (r) passing through P)
The wire rod (A) is supplied to the mold with a receding angle within the range of 30' from the front to the rear with the center at 20', and the wire rod (A) is attached to the stopper pin (8) by the compression clamp (6). A right angle mirror cutting method for cutting a wire rod by moving the movable molds (1) and (2) relative to the fixed molds (3) and (4) while applying strong pressure. [2] The movable mold unit (10), which holds a pair of movable molds (1) and (2) which sandwich the wire rod (A) to be cut, in an openable and closable manner, is attached to the fixed mold ( 3), (4) are attached to the fixed side mold unit (20) which is held so as to be openable and closable, so that both these units (10), (2) can be moved freely relative to each other.
On one side of the wire rod (A), there is a center line (S
), a compression clamp (6) is provided that presses the wire (A) against the mold, and a stopper pin (8) that supports the end surface of the wire (A) is placed on the other side. The parts are arranged in the wire holding grooves (1b), (2b) of the movable side molds (1), (2) so as to be adjustable in depth and depth directions, and are adapted to the cutting operation movement of the movable side mold unit (10). A right-angle mirror cutting device for wire rods that moves synchronously in the same direction. [3] Means (52) for pressurizing and moving the stopper pin (8) toward the inner depths of the movable molds (1) and (2) when the movable mold unit (10) moves for cutting action; (54
) A right-angle mirror cutting device for wire rods.