JP4876622B2 - Uncoiler for progressive press machine - Google Patents

Description

  The present invention relates to an uncoiler for a progressive press working apparatus in which a coil material obtained by winding a strip-shaped metal member in a cylindrical shape is attached to an uncoiler, and the strip-shaped metal member drawn from the uncoiler is forward-fed to a mold and press-molded.

Conventionally, the progressive press processing apparatus of patent document 1 is known. The press working apparatus includes an uncoiler, a leveler, a feeder, and a press machine in order to sequentially feed and press-form the band-shaped metal member. The band-shaped metal member is a coil material wound in a cylindrical shape, and is attached to the uncoiler in the state of the coil material. The uncoiler includes a core member that rotates about a shaft and a plurality of segments that are attached to the core member so as to be movable in the radial direction. The plurality of segments move outward in the radial direction and hold the coil material by pushing the inner peripheral surface of the coil material. The band-shaped metal member fed from the coil material mounted on the uncoiler is corrected for curl by a leveler, intermittently fed sequentially toward a press by a feeder, and press-molded by the press.
JP-A-6-126356

The strip-shaped metal member of the coil material is fed out of the uncoiler by the shaft rotation of the core member of the uncoiler. However, when the number of turns is about one turn, the winding state is released. Thereafter, the terminal portion of the coil material moves while scratching the radially outer surface of the segment, and is drawn out from the uncoiler side. Therefore, the segment is scratched by the end portion of the coil material. When a new coil material is installed on a segment with increased damage and the segment is pressed against the inner peripheral surface of the new coil material, the inner peripheral surface of the new coil material will be damaged. Therefore, the coil material end has a problem that the product becomes defective. In order to solve this problem, a method of exchanging the segment can be considered, but the segment is expensive and the exchange operation is not easy. Therefore, the exchange of segments has not been made in the past, and the above problem has been left unattended.
Therefore, the present invention provides an uncoiler for a progressive press working apparatus having a configuration for preventing the inner peripheral surface of the coil material from being damaged when the inner peripheral surface of the coil material is pressed to hold the coil material. The task is to do.

In order to solve the above-mentioned problems, the present invention is an uncoiler for a progressive press machine having the structure as described in each claim.
According to the invention described in claim 1, the uncoiler has a core member and a plurality of segments. The plurality of segments are configured to hold the coil material by moving radially outward and pushing the inner peripheral surface of the coil material. In at least one of the plurality of segments, a surface protection member is detachably attached to a radially outer surface facing the inner peripheral surface of the coil material in the holding state, and the surface protection member is attached to the inner periphery of the coil material. It is configured to be pressed against the surface.

  Therefore, after the number of turns of the coil material is reduced and the winding state is released, the terminal portion slides on the outer surface of the surface protection member. And when a big damage | wound arises in the surface protection member by the terminal part of a coil material, a surface protection member can be replaced | exchanged. Therefore, generation | occurrence | production of the damage | wound of the coil material which arises by pressing the surface protection member which has a big crack | wound against the inner peripheral surface of a coil material can be suppressed. Thus, defective products at the coil end can be reduced.

According to invention of Claim 2, the surface protection member is formed by performing a surface treatment to the plate body which heat-processed the iron alloy.
By the way, a segment is generally formed from rolled steel for general structures such as SS400, and is generally not subjected to heat treatment and surface treatment. Therefore, the segment has a Vickers hardness of about HV115 and is often damaged by the end portion of the coil material. On the other hand, the surface protection member is attached to the segment in the present invention. And since the surface protection member is formed from the plate body which heat-processed the iron alloy, it is very hard compared with the said segment, and is hard to be damaged. In addition, the surface protection member is subjected to a surface treatment. Therefore, the coefficient of friction is small, the end portion of the coil material is not easily caught by the surface protection member, and the surface protection member is hardly damaged. Therefore, the surface protection member is less likely to be scratched by the heat treatment and the surface treatment than the segment. As a result, the number of replacements of the surface protection member can be reduced.

According to the invention described in claim 1, the segment, a plurality of odd number of surface protection member is attached in a state of being juxtaposed in the axial direction.
Therefore, only the surface protection member that needs to be replaced can be replaced as appropriate. For example, a plurality of types of coil materials having different widths may be attached to the uncoiler. Therefore, the surface protection member which is easily damaged by the position in the axial direction and the surface protection member which is not so are generated. On the other hand, in the present invention, since only the surface protection member having a large scratch can be replaced, the total material cost of the surface protection member can be suppressed.
According to invention of Claim 3, a groove | channel is formed over the circumferential direction full length in the axial direction center area | region of the radial direction outer side surface of a segment. A surface protection member is detachably attached to the groove in the radial direction, and a plurality of surface protection members are juxtaposed in the axial direction in the groove.

The progressive press processing apparatus 10 which concerns on embodiment, and the uncoiler 1 of this apparatus are demonstrated according to FIGS.
As shown in FIG. 1, the progressive-feed press working apparatus 10 is an apparatus that progressively feeds and press-molds the band-shaped metal member W, for example, an apparatus that manufactures vehicle parts such as a reclining gear (ratchet) of a vehicle seat. is there.

  As shown in FIG. 1, the progressive press processing apparatus 10 includes an uncoiler 1, a leveler 12, a looping space 13, a feeder 14, and a press machine 16 from upstream to downstream. The band-shaped metal member W is attached to the uncoiler 1 as a coil material C wound in a cylindrical shape in the thickness direction. The band-shaped metal member W has its curl corrected by the leveler 12 and the looping space 13, fed forward to the press machine 16 by the feeder 14, and press-formed by the press machine 16.

As shown in FIG. 1, the uncoiler 1 includes a support body 4, a core member 2, and a plurality of (for example, four) segments 3.
The core member 2 is supported so as to be axially rotatable with respect to the support body 4.
The plurality of segments (winding drums) 3 are disposed on the outer peripheral side of the core member 2 at substantially equal intervals in the circumferential direction, and are attached to the core member 2 so as to be movable in the radial direction.

As shown in FIGS. 2 to 5, the segment 3 includes a main body 3 a having a circular arc cross section, and a plurality of long ribs 3 b and short ribs 3 c formed on the inner peripheral surface of the main body 3 a. The long rib 3b and the short rib 3c extend in the axial direction and the radial direction, respectively.
A groove 3d is formed on the radially outer surface of the main body 3a as shown in FIGS. The groove 3d is formed across the entire length in the circumferential direction at the axial center of the main body 3a, and a plurality of (for example, three) surface protection members 5 are disposed in the groove 3d.

The surface protection member 5 was formed by performing a surface treatment on a plate body obtained by heat-treating an iron alloy such as carbon steel for mechanical structure (for example, S45C). As the heat treatment, for example, quenching, tempering, and annealing were performed. As the surface treatment, plating treatment (for example, chrome plating treatment), PVD coating, WPC treatment or the like was performed on at least the radially outer surface.
The surface protection member 5 formed by chrome plating after quenching S45C has a Vickers hardness of HV513 to 577. On the other hand, since the segment 3 uses SS400, the Vickers hardness is about HV115. Therefore, the surface hardness of the surface protection member 5 is 3 times or more or 4 times or more that of the segment 3.

Surface protective member 5 is almost the same as the circumferential length of the segment 3 the length of the circumferential direction as shown in FIGS. 3-5. Therefore, the surface protection member 5 is configured to cover and protect the segment 3 over the entire length in the circumferential direction.
The surface protection member 5 is installed in the groove 3d of the segment 3, and the three surface protection members 5 are installed in one groove 3d in parallel in the axial direction. Each surface protection member 5 is detachably attached to the segment 3 by a plurality of bolts 20. One sheet of the surface protection member 5 is attached at a substantially central position in the axial direction of the segment 3, and the remaining two sheets are attached at positions adjacent to the one sheet.

The three surface protection members 5 are all formed in the same shape as shown in FIG. 2, and the total width of the three sheets is larger than the width of the coil material C (band metal member W). It is getting longer. Three surface protection members 5 are attached to each of the four segments 3.
As shown in FIGS. 3 and 5, a scale 6 is attached to at least one of the four segments 3.

  The scale 6 has a scale 6a as shown in FIG. 3, and the scale 6a is used when the strip-shaped metal member W is aligned in the axial direction. The scale 6 is installed in a groove 5 a formed in the surface protection member 5, and becomes substantially flush with the surface protection member 5 by being installed in the groove 5 a. The groove 5 a extends across the plurality of surface protection members 5, and the scale 6 is attached to the surface protection member 5 with bolts.

The strip-shaped metal member W is attached to the uncoiler 1 as a coil material C wound in the thickness direction in a cylindrical shape as shown in FIG.
When the coil material C is mounted on the uncoiler 1, first, the coil material C is hung on the outer periphery of the segment 3. And the coil material C is installed in the axial direction approximate center position of the segment 3 using the scale 6 (refer FIG. 3). Next, the plurality of segments 3 are moved outward in the radial direction, and the coil material C is held by pushing the inner peripheral surface of the coil material C outward by the plurality of segments 3. At this time, the surface protection member 5 is pressed against the inner peripheral surface of the coil material C.

When the tip of the coil material C is pulled by the leveler 12, the coil material C rotates with the uncoiler 1 and the strip metal member W of the coil material C is fed out of the uncoiler 1 (see FIG. 1).
The leveler 12 has a plurality of pairs of rollers 12a that sandwich the band-shaped metal member W in the thickness direction. The plurality of pairs of rollers 12a are alternately arranged up and down, and the rollers 12a rotate to pull the band-shaped metal member W from the uncoiler 1 side and correct the curl of the band-shaped metal member W.

The strip-shaped metal member W discharged from the leveler 12 is in a state in which a large curve is drawn so that the curl once corrected by the looping space 13 is not attached again as shown in FIG. Further, the looping space 13 also plays a role of adjusting a feed speed difference of the band-shaped metal member W by the leveler 12 and the feeder 14.
The feeder 14 has at least a pair of rollers 14a that sandwich the band-shaped metal member W in the thickness direction. The roller 14a intermittently sends out the band-shaped metal member W from the looping space 13 toward the press 16 by rotating.

  As shown in FIG. 1, the press machine 16 has a mold having an upper mold 16 a and a lower mold 16 b. The press machine 16 performs press molding by moving the upper mold 16a up and down relative to the lower mold 16b. The upper mold 16a and the lower mold 16b have a plurality of stations, and each station performs press molding. Therefore, a plurality of press forming steps can be performed by one forming die by intermittently feeding the band-shaped metal members W in order in synchronization with the raising and lowering operation of the upper forming die 16a and raising and lowering the upper forming die 16a.

  For example, the station for the mold is a station for punching a pilot hole in the band-shaped metal member W, a station for half-cutting the reclining gear and the projection, a station for punching the outer periphery of the reclining gear, and no longer needed after molding. It is a station that cuts the tip of the band-shaped metal member W.

  The coil material C is gradually drawn out from the uncoiler 1 side, and when it reaches the remaining one round, the winding state is released. Thereafter, as shown in FIG. 6, the terminal end portion W <b> 1 of the coil material C (band metal member W) is shifted from the segment 3. And the terminal part W1 is drawn in to the leveler 12 side, after sliding on the outer surface of the surface protection member 5 attached to the segment 3. Therefore, the surface protection member 5 may be scratched by the end portion W1. And when a damage | wound becomes large, the surface protection member 5 is replaced | exchanged for a new thing. Or replace it with a polished surface.

The embodiment is formed as described above.
That is, the uncoiler 1 has a core member 2 and a plurality of segments 3 as shown in FIG. The plurality of segments 3 are configured to hold the coil material C by moving radially outward and pressing the inner peripheral surface of the coil material C. And the surface protection member 5 is detachably attached to the plurality of segments 3 on the radially outer surface facing the inner peripheral surface of the coil material C in the holding state. It is configured to be pressed against the peripheral surface.

  Therefore, as shown in FIG. 6, after the coil material C is unwound by reducing the number of turns, the terminal end portion W <b> 1 slides on the outer surface of the surface protection member 5. And when the surface protection member 5 has a big damage | wound by the terminal part W1 of the coil material C, the surface protection member 5 can be replaced | exchanged. Therefore, generation | occurrence | production of the damage | wound produced by pressing the surface protection member 5 which has a big damage | wound on the inner peripheral surface of the coil material C can be suppressed. Thus, defective products at the coil end can be reduced.

The surface protection member 5 is formed by subjecting a plate body obtained by heat-treating an iron alloy to a surface treatment.
Therefore, since the surface protection member 5 is heat-treated, it is much harder than the segment 3 and hardly damaged. In addition, the surface protection member 5 is subjected to a surface treatment. Therefore, the coefficient of friction is small, the terminal portion W1 of the coil material C is hardly caught by the surface protection member 5, and the surface protection member 5 is hardly damaged. Therefore, the surface protection member 5 is less likely to be scratched than the segment 3 by heat treatment and surface treatment. As a result, the number of replacements of the surface protection member 5 can be reduced.

Further, as shown in FIG. 2, a plurality of surface protection members 5 are attached to the radially outer side surface of the segment 3 in a state of being arranged in parallel in the axial direction.
Therefore, only the surface protection member 5 that needs to be replaced can be replaced as appropriate. For example, a plurality of types of coil materials C having different widths may be attached to the uncoiler 1. Therefore, the surface protection member 5 which is easily damaged by the position in the axial direction and the surface protection member 5 which is not so are generated. On the other hand, in this embodiment, since only the surface protection member 5 having a large scratch can be replaced, the total material cost of the surface protection member 5 can be suppressed.

Further, as shown in FIG. 2, the segment 3 has an odd number (for example, three) of surface protection members 5 arranged in parallel in the axial direction. And the coil material C is installed centering | focusing on the surface protection member 5 arrange | positioned in the center of odd-numbered sheets.
Therefore, the outer surface of the surface protection member 5 disposed at the center can be damaged by the terminal portion W1 of the coil material C in both the narrow coil material C and the wide coil material C. On the other hand, the surface protection members 5 disposed on both side positions can be damaged only by the end portion W1 of the wide coil material C. Therefore, the surface protection member 5 disposed at the center is more easily damaged than the surface protection members 5 disposed at both side positions. Therefore, the total material cost of the surface protection member 5 can be suppressed by increasing the replacement frequency of the surface protection member 5 disposed at the center as compared with those disposed at both side positions.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be, for example, the following forms.
(1) That is, in the above embodiment, three surface protection members are attached to each segment. However, one, two, or four or more surface protection members may be attached to each segment.
(2) The surface protection member according to the above embodiment is a metal plate. However, it may be a resin plate that is not made of metal. Or a metal film, a resin film, etc. may be sufficient.
(3) In the uncoiler according to the above embodiment, a surface protection member is attached to each segment. However, the surface protection member may be attached to at least one of the segments.
(4) The uncoiler according to the above embodiment has four segments. However, the uncoiler may have two, three, five or more segments.

It is a front view of a progressive-feed press processing apparatus. It is a perspective view of the core member and segment of an uncoiler. It is a top view of a segment and a surface protection member. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3. FIG. 5 is a cross-sectional view taken along line VV in FIG. 3. It is the schematic of an uncoiler and a surface protection member which show the state by which the terminal part of a coil material is dragged with respect to an uncoiler.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Uncoiler 2 ... Core member 3 ... Segment 4 ... Support body 5 ... Surface protection member 6 ... Scale 10 ... Press processing apparatus 12 ... Leveler 13 ... Looping space 14 ... Feeder 15 ... Loading mechanism 16 ... Press 16a ... Upper mold (mold)
16b ... Lower mold (mold)
C ... Coil material W ... Band-shaped metal member W1 ... Terminal part

Claims (3)

An uncoiler for a progressive press working apparatus that attaches a coil material obtained by winding a strip-shaped metal member into a cylindrical shape to an uncoiler, and forward-presses the strip-shaped metal member drawn from the uncoiler to a molding die,
A core member that rotates around the shaft, and a plurality of segments attached to the core member so as to be movable in the radial direction;
The plurality of segments are configured to hold the coil material by moving radially outward and pressing the inner peripheral surface of the coil material, and at least one of the plurality of segments includes the holding state. The surface protection member is detachably attached to the radially outer surface facing the inner peripheral surface of the coil material, and the surface protection member is configured to be pressed against the inner peripheral surface of the coil material .
An uncoiler for a progressive press machine , wherein a plurality of odd-numbered surface protection members are attached to the segment in a state of being arranged in parallel in the axial direction . An uncoiler for the progressive press machine according to claim 1,
The surface protection member is formed by subjecting a plate body obtained by heat-treating an iron alloy to a surface treatment. An uncoiler for the progressive press machine according to claim 1 or 2,
A groove is formed in the axially central region of the radially outer surface of the segment over the entire length in the circumferential direction,
An uncoiler for a progressive press machine , wherein a surface protection member is detachably attached to the groove in a radial direction, and a plurality of the surface protection members are arranged in the axial direction in the groove .

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