JPH0553580B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a device for burnishing the cut edge of a band-shaped plate formed by slitting a wide metal plate.

[Conventional technology]

In recent years, relay contacts, lead frames, etc. have been used in mechanical, electrical, and electronic fields.
Various parts such as connectors are increasingly being manufactured from coiled materials.

The coil material, which is the raw material, is manufactured by cutting a wide rolled metal plate A into a long strip C having a required width using a slitter B shown in FIG.

The slit B includes a plurality of disc-shaped slits a and b.
are arranged vertically alternately, and a wide plate material A is fed between the upper and lower cutters a and b to cut and form a plurality of strip-shaped plates C.

[Problem that the invention seeks to solve]

When a band-shaped plate is produced by cutting a wide plate material using the above-mentioned slivers, burrs are formed on the cut edges (on both sides in the length direction) of the band-shaped plate, and the band-shaped plate is bent due to the pressing force of the upper and lower cutters. , deformation stress such as curvature is applied.

Figure 8 schematically shows the deformation of the strip C when the wide plate material A shown in chain lines is slit using a conventional slitting device, where δ is the vertical deformation (opening), and θ is the twist of the edge. , ΔB (B _O −B) indicates a change in width dimension (width shrinkage), and the smaller these values, the smaller the residual stress.

That is, when the various parts that require precision are manufactured using a band-shaped coil material having deformation stress, the result is a decrease in shape precision and dimensional precision.

Therefore, efforts were made to minimize the deformation of the strip coil material after cutting by increasing the diameter of the cutter, minimizing the overlap between the upper and lower cutters, and reducing the clearance between the upper and lower cutters. However, there is a limit to the amount of distortion that can be reduced. Furthermore, increasing the cutter diameter causes structural problems such as increased overlap and clearance fluctuations, and this cannot be said to be a sufficient solution.

[Means for solving problems]

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the conventional slitting technique for wide plate materials using a slitter, it is an object of the present invention to provide a burnishing device that actively reduces residual stress that causes undesirable deformation of various parts. .

In order to achieve such an object, the present invention supports a long strip plate 6 cut with a slitter to have a predetermined width dimension by sandwiching it in the running direction. It consists of a pair of upper and lower support rollers 1a and 1b formed with a narrow width interval, and a pair of left and right burnishing rollers 2 with a larger diameter than the roller 1b, which are arranged on both sides of the support roller 1b and fixed to the rotating shaft 4 of the roller 1b, The upper roller 1a, which is fixed to the rotating shaft 3 and movable up and down, is made of a metal material, and the lower roller 1b is made of an elastic material.
A pressing surface 5 is formed on the side surface of the burnishing roller 2 at a height opposite to the clamping surfaces of a and 1b in an inclined shape tapering in the circumferential direction.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIGS. 1 and 2 show a burnishing device according to the present invention, and this device is composed of a pair of support rollers 1a and 1b arranged above and below, and a pair of burnishing rollers 2 arranged on the left and right sides.

Among the support rollers 1a and 1b, the upper metal roller 1a is fixed to a rotating shaft 3, and the roller 1a and the rotating shaft 3 are movable up and down as a unit. Further, the lower roller 1b is made of an elastic material such as rubber, and is fixed to the rotating shaft 4.

Both the upper and lower rollers 1a and 1b are formed by cutting a wide plate material to have a predetermined width using a known slitter (not shown).The circumferential surfaces of the upper and lower rollers 1a and 1b face each other in the running direction of a long belt-like plate to be described later. It is possible to change the relative position. Moreover, both rollers 1a and 1b sandwich a strip plate between their circumferential surfaces, rotate along the running direction of the strip plate, and are capable of supporting the strip plate.

A pair of burnishing rollers 2 made of metal are arranged on both sides of the lower roller 1b and fixed to the rotating shaft 4. This burnishing roller 2 has a larger outer diameter than the roller 1b, and the upper and lower rollers 1a, 1b
A pressing surface 5 tapering in the circumferential direction from the center is formed on the side surface of both burnishing rollers 2 at a height opposite to the clamping surface of the strip plate formed by the pressing surface 5.

The inclined surface 5 may be formed on both side surfaces of each roller 2 as shown in the figure, but it may also be formed symmetrically only on the inner side surface facing the sandwiching surfaces of the rollers 1a and 1b.

As described above, the burnishing device having the above configuration is installed in front of the strip plate 6 formed by slitting a wide plate material in the traveling direction, and as shown in FIG.
The circumferential width distance between a and 1b is smaller than the width dimension of the strip plate 6. Therefore, when the strip plate 6 is fed between the upper and lower support rollers 1a, 1b, the upper roller 1a descends and presses the strip plate 6 between the rollers 1b, so that the strip plate 6 is fed between the rollers 1a, 1b. The belt-like plate 6 runs while being held between the holding surfaces of the band-like plate 6, and both longitudinal side edges 7 of the band-like plate 6 protrude outside the rollers 1 and 1b.

In this way, both side edges 7 of the strip plate 6 are connected to the roller 1.
When the roller 1a, which is located outside of the rollers a and 1b and has elasticity, presses the strip plate 6 against the elastic roller 1b, the strip plate 6 is lowered by that amount, and the slitter forms the cut edges 7 on both sides of the strip plate 6. Tabari is
As shown in detail in FIG. 3, it is pressed against the inclined pressing surfaces 5 of the burnishing rollers 2 located on both sides of the roller 1b, and burnishing is performed from the burr 8 side to the droop 9 side.

The strength of the burnishing can be adjusted by the height position of the strip 6 and the pressing position relative to the inclined pressing surface 5.

Figures 4, 5, and 6 show burnishing results such as "opening", "twisting", and "width shrinkage" of the strip plate 6. It can be seen that "twisting" and "width shrinkage" are greatly reduced.

〔Effect of the invention〕

According to the present invention described above, the strip plate 6 formed by slitting a wide plate material runs while being held between the upper and lower rollers 1a and 1b in the traveling direction, and protrudes from the rollers 1a and 1b on both sides. Both edges 7 of the strip plate 6 are the inclined pressing surfaces 5 of the burnishing roller 2.
Since the burrs 8 on both edges 7 can be burnished continuously on the droop 9 side.

Therefore, the deformation stress applied downward to both sides of the strip plate 6 by slitting is reduced, and vertical deformation (opening) of the strip plate 6 and twisting of the edges can be reduced. .

In particular, in the present invention, of the pair of upper and lower support rollers 1a and 1b that sandwich and support the strip plate 6, the lower roller 1b is made of an elastic material, so that the upper roller 1
When the roller a is lowered, the roller 1b is compressed, and the strip plate 6 is lowered by that amount, so that the side edges 7 are strongly pressed against the inclined pressing surface 5 of the burnishing roller 2, resulting in an even better burnishing effect.

In addition, since the burnishing device is installed in front of the strip plate 6 in the traveling direction, the strip plate 6 is guided from the slitter to the burnishing device and runs straight, reducing warping and distortion in the length direction. It is.

Furthermore, in the device of the present invention, since the positional relationship of the pressing surface 5 with respect to the strip plate 6 can be adjusted, there is no need to consider the thickness of the strip plate 5, and the device can be applied to extremely thin plates.

[Brief explanation of the drawing]

Fig. 1 is a front view of the device of the present invention, Fig. 2 is a side view of the same, Fig. 3 is an enlarged sectional view of the main part showing the burnishing state, Fig. 4 is a view showing the burnishing result on opening, Fig. 5 6 is a diagram showing the burnishing effect on twist, FIG. 6 is a diagram showing the burnishing effect on width shrinkage, FIG. 7 is a front view of a conventional slitter, and FIG. 8 is a perspective view showing deformation of a strip plate. 1a and 1b are support rollers, 2 is a burnishing roller,
3 and 4 are rotating shafts, 5 is a pressing surface, 6 is a strip plate, 7 is a cutting edge, 8 is a burr, and 9 is a recess.

Claims (1)

[Claims] 1 A pair of upper and lower support rollers 1a that sandwich and support a long strip plate 6 cut with a sliver to have a predetermined width dimension in the running direction, and are formed at a width interval narrower than the width of the strip plate 6. , 1b, and a pair of left and right burnishing rollers 2 having a larger diameter than the roller 1b, arranged on both sides of the support roller 1b and fixed to the rotating shaft 4 of the roller 1b, and fixed to the rotating shaft 3 and movable up and down. The upper roller 1a is made of a metal material, and the lower roller 1b is made of an elastic material.The side surface of the burnishing roller 2, which is located at a height opposite to the sandwiching surfaces of the upper and lower rollers 1a and 1b, is tapered in the circumferential direction. A burnishing device for plate material, characterized in that a pressing surface 5 is formed.