JP2853123B2 - Cold-rolled metal molding, molding method and molding apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Background of the Invention]   The present invention relates to cold rolling of metal strips, particularly in the longitudinal direction.
Left and right zones with different thicknesses, made to be meat, and spaced apart from each other
A method of continuously cold rolling a metal strip so as to form
Equipment and rolled products made from such metal strips
Get involved.   Formed by rolling a metal strip to the required cross-sectional area
Many elongated structures are used. For example, for suspended ceilings
Examples include a lattice T-shaped member, a metal stud for a wall, and a corrugated metal plate. Ma
Also, in many cases, such structures are identified at specific locations within the structure.
If the metal can be concentrated in the area, the forming material of this structure is more effective
It is used for   For example, a grid T-shaped member for a suspended ceiling is located along one edge.
With a spherical projection and a flange along the opposite edge
It is usual to do. In such a lattice T-shaped structure
The spherical projections and flanges provide the main structural strength,
The web does not contribute much to the strength of the structure. The role of Webb
The purpose is to maintain the distance between the spherical projection and the flange.
You. Therefore, the web is thinned to form a lattice T-section.
Material is concentrated at both ends of the grid corresponding to spherical projections and flanges
Then, the material use efficiency of the lattice T-shaped member can be improved.   Disclosed in U.S. Pat.No. 4,206,578 filed by the applicant
Invention concentrates the material at both ends to draw profit
Is disclosed. The description of the specification in this patent is
It is also quoted in the application specification.   In addition, the metal studs and channel webs are
By making it thinner than the T-shaped material,
Similarly, the use efficiency of the material is increased. Similarly, the corrugated board
Thinner webs improve material use efficiency
Often.   In general, conventionally any longitudinal section is thinned,
Gold to leave the part at its original thickness greater
It is impossible or practically difficult to cold roll the genus
Met. For example, an I-beam is "hot" roll formed
Was normal. That is, the beam forming material is rolled
Temperature above the recrystallization temperature so that it is very plastic before
Roll formed in degrees. Extrusion at high temperature
Or rolling to obtain a non-uniform cross-sectional shape
The scheme is also well known.   In a typical cold rolling forming operation that changes the thickness,
Pass the strip or plate material between two opposing rolls,
Pressure is applied to both sides of the resin to plastically deform it to make it thinner.
In such known rolling, the strip material is mainly
And the strip elongates. Thinning over the entire width of the band
If performed uniformly, the elongation extends over the entire width of the strip.
There is no problem because it occurs uniformly.   However, a part of the length was left at the original thickness.
A known room temperature while thinning another longitudinal part
If the rolling operation is applied, the part that becomes thinner
The part where the thickness does not change while extending in the longitudinal direction
Does not stretch, causing serious difficulties. As a result,
Shrinkage or torsion occurs in the shape, and the linear appearance is lost
You. Therefore, a structure of the general type described above is manufactured.
This is because such a rolling operation cannot be used.
No.   The invention of U.S. Pat.
Parts become thinner and the other parts remain at their original thickness.
By rolling and forming as in
Suggest a stem. In this patent invention, a strip is used.
Opposing corrugations while keeping the left and right edges of the
A method of passing between work rolls is disclosed. This way
Does not apply lateral tension to the material to be corrugated.
The one that tries to expand in the horizontal direction to make it thinner
It is. This patented invention also then flattens this waveform
It also discloses the steps to perform. Disclosed in this patented invention
That some of the methods have been further developed and commercialized
Does not seem to be. [Disclosure of the Invention]   The present invention has little effect on the strength and usefulness of the article
Cold-rolled metal forming that saves the amount of metal in the article without the need
The present invention relates to an article, a manufacturing method thereof, and a manufacturing apparatus. In some cases
May heat the metal to a predetermined temperature below the recrystallization temperature
However, the method of the present invention is preferably performed at room temperature. Follow
The “room temperature molding” or “room temperature pressure” used here
The term “rolled” means that at temperatures below the recrystallization temperature of the metal
Processing, preferably at room temperature
You.   One of the main points of the present invention is to curl or buckle a metal band.
Thickness, extending in the fixed direction of the metal strip without
Metal strips with left and right sections or zones
To provide a new cold rolling method that enables
It is in. This new method generates shear deformation on the surface of the metal strip.
Almost no longitudinal component to be generated
The metal is made thinner with almost no deformation.
A plane that is inclined with respect to the plane and that is substantially perpendicular to the longitudinal direction of the metal strip
Within the longitudinal direction of the metal strip
Relative movement of the shear force
Even forming a thin longitudinal zone, or part
It is characterized by.   In a particularly preferred illustrated embodiment, the longitudinal direction of the metal strip is
Along the side of the metal strip
By applying shear force to the adjacent part, the thin zone
Gradually expand.   In another preferred embodiment, the length of the metal strip is
Only a limited number of machined parts in the horizontal direction of the metal strip
The first thin film is applied by sequentially applying a shearing force to the contacting portion.
Forming a meat portion or thin zone, and then forming the first
Jump over the non-thin section adjacent to the thin section and
The first thin zone by applying shearing force with
The second is to keep the space in the horizontal direction only for the part that jumps from the
To form a thinned portion or zone. Expected thin zone
Repeat this jump until the total width is obtained. like this
In a preferred embodiment, only a relatively narrow non-thin section is adjacent to the thin section.
Two or more thin sections or zones that keep the space
Is done. In the two illustrated embodiments, the mandrel
Rotate the handle and align it approximately with the longitudinal direction of the metal strip
The deformation pressure is applied to the metal strip along the
By rotating a pressure roll configured to
Apply deformation pressure. The length of the deformation zone is greater than its width
Much larger, by mandrel and pressure roll
The applied friction suppresses metal flow in the longitudinal direction,
The resistance to metal flow is extremely small
The metal flows laterally.   Also, in any of the embodiments, the metal is deformed in the deformation zone.
By blocking along one side of
Blocks directional flow, lateral flow almost to the opposite side
In the opposite direction.   In such a preferred embodiment, the
The shear force applied at the processing section
To the machined part.
And keep the magnitude of the shear force
Deformed to the minimum thickness equivalent to (thickness) x (this sin angle)
It is preferable to control such that In light of experience, thin
Detrimental longitudinal flow and cracking of metals along meat zones
Is limited by limiting the amount of thinning to the above levels.
It can be suppressed to a minimum. However, the zone above
Satisfactory even if it is much thinner than the sine level mentioned
Results were obtained in some cases.   The method of the present invention can be applied to the original thickness portion and the original thickness.
Infinite gold with a longitudinal section much thinner than its thickness
Use a high-speed cold-rolling mill to produce metal bands
Can be. For thinning, almost stretch the strip in the longitudinal direction
The flatness and the linearity of the strip are almost all
Doesn't hurt. In addition, shear deformation and thinning can be achieved by
By applying balanced stresses to
Problems associated with guiding the strip are reduced.
You.   The present invention also provides for shearing in relatively low stress zones.
The zone where the element metal is thinned by deformation and the stress is high
Concentration of metal on
To provide a new and improved method for producing elongated structural elements
You.   The present invention also provides for the longitudinal
By thinning and work hardening,
Elongate structural element for efficient use of metal
And a new and improved process. Furthermore, this invention
Ming, after coating the strip,
This coated elongated without any damage
A method is provided for thinning a longitudinal portion of a strip.   The invention further provides that the longitudinal portion is sheared.
Provided is an elongated strip-shaped metal plate having a reduced thickness.   The invention also provides that the metal forming the T-section web is a sphere.
Suspended ceiling thinner than metal forming ridges and flanges
A new and improved lattice T-section for use with   The present invention further provides a web section that has been sheared and thinned.
To make effective use of metal materials
To provide a new and improved stud structure.   In the present invention, the connecting web portion is larger than the surface portion.
Provide a new and improved corrugated metal structure that is thin.   Furthermore, the present invention provides a method for performing the above process.
A new and improved device is provided. [Preferred Embodiment of the Invention]   FIGS. 1 through 11 show the preferred embodiment of the invention described first.
A first embodiment will be described.   FIG. 1 shows a strip extending in shear according to the invention.
1 shows an elongated member 10 made from a metal strip. Suspended ceiling
0.051cm (0.01cm)
The present invention is practiced using relatively thin materials (less than 20 inches).
It is preferable to carry out. However, the present invention uses thicker gold.
And the term “metal sheet”
Includes relatively thick materials such as so-called "plates"
Should be understood. As shown, the member 10 is flat
Central wall part 11 and the outer edge
And left and right wall portions 12, 13 forming the flange portions 14, 16.
You. Both side flange portions 14 and 16 are
Outward, the continuous wall portions 12 and 13 are bent at a substantially right angle.
ing.   The central wall portion 11 and the peripheral flange portions 14 and 16
Thickness that is approximately equal to the original thickness of the strip that is the material that forms
T₁The left and right wall portions 12, 13 have a thickness T due to metal deformation._Two
Work hardening that occurs during the work of deformation and thinning
Harder than other parts due to   As shown, the left and right wall portions 12, 13 are
The leg is opened by an angle A from a plane perpendicular to. preferable
In the manufacturing method, the thickness T_TwoTo T₁ equal to or equal to sin A
Be larger. For details, as described later
In the light of experience, the value given by the above sine equation
By limiting the amount of thinning on the bell, the left and right wall sections
12 or 13 unwanted longitudinal flow or cracks
Can be deterred. Shear deformation of left and right wall parts 12, 13
Forming and T₁ Thickness T approximately equal to sin A_TwoA place to thin
In this case, the width of the member 10, that is, the edges 17, 18 of the peripheral flanges 14, 16
The lateral spacing between them is the first of the metal strips used to form the part.
It is almost equal to the period.   2 to 6 show that the metal strip 21 is continuously cold-rolled.
1 schematically illustrates a method and apparatus for shaping a material 10. Equipment shown
Includes four processing sections 23 to 26,
The number of processed parts may be increased or decreased according to the size. FIG. 2 through FIG.
In Fig. 6, deformation work is performed to make it easier to understand the metalworking stage.
It is shown in an exaggerated manner.   The processing section 23 is provided with a rotating mandrel 41.
As shown in FIG. 3, the mandrel 41 is a power-driven
It takes the form of a roller attached to the shaft 42. Mandrel 41
Has a cylindrical peripheral surface 46 in the center and frustoconical side surfaces 47 and 48 on the left and right.
Respectively. With each frustoconical surface 47,48 of the mandrel 41
The angle formed by the vertical center plane 44 is described with reference to FIG.
The width of the cylindrical peripheral surface 46 is equal to the solid angle A as shown in FIG.
Is equal to the width of the central wall portion 11 of the member 10 shown in FIG.   The processing part 23 has a pair of pressure lows above the mandrel 41.
Tools 51 and 52 are arranged. Both rolls 51 and 52 are exactly the same
But in the opposite direction, equidistant from the vertical center plane 44
It is attached to a common shaft 53 at a remote position. Sha
The shaft 53 is rotatable about its axis 54,
The axis 43 of 42 and the axis 54 are located in the same vertical plane.
It is supported.   For the pressure rolls 51 and 52,
A pair of fluids is applied to apply a force acting on
Pressure piston / cylinder actuators 56 and 57
Provide. Hydraulic actuators 56 and 57 are mounted on machine frame 60.
With the attached cylinder and both ends of the shaft 53 via the bearing 61
And connecting piston rods 58,59. Pressurized
Then, the actuators 56 and 57 are closed around the rolls 51 and 52.
A downward force indicated by an arrow 62 is applied to the shaft 53.
You.   Both pressure rolls 51, 52 start shearing deformation of the metal strip 21.
It has a peripheral surface configuration configured as described above. With particular reference to Figure 3a.
The explanation about the roll 52 is also applicable to the pressure roll 51.
Round. The shape and dimensions of both rolls are
Because they are the same. As shown in FIG. 3a, the roll 52
The peripheral surface has a projecting edge 66 of maximum diameter. This protruding edge
Inclined surface 48 of mandrel 41, radially inward from 66
A frusto-conical shaped working surface 67 cooperating with. Illustrated
As shown, the frusto-conical processing surface 67 is cooperated with the mandrel 41.
It is parallel to the inclined surface 48 that is the work surface. However, depending on the case
Therefore, non-parallel cooperating surfaces may be employed.   Next, the operation will be described.
Corresponds to the working surface 67 of the two pressure rolls 51 and 52
It enters between the conical surfaces 47 and 48 of the mandrel 41 and forms a metal strip.
Yield metal to form a thin zone 68 in the longitudinal direction of the
Actuators 56,5
Added by seven. Member 10 described in connection with FIG.
Thickness T corresponding to the thickness of the left and right wall portions 12, 13 at_TwoMa
With this, the zone 68 is thinned.   The strip 21 is sheared to form a zone 68.
However, the strip does not stretch so prominently in the longitudinal direction.
Thus, curling and buckling problems are avoided. This
Thus, the manner in which the zones 68 are formed is illustrated in FIG. 3a.
The force of the pressure roll 52 is applied in the direction of the arrow 71. pressure
The shear force applied by the roll 52 in the direction of the arrow 71 is
It is inclined with respect to the outer surface 65 adjacent to the metal strip 21,
This force is long because it lies in a plane
Almost no hand direction component. As shown,
The force in the direction of 71 is the component parallel to the outer surface 65 of the metal
It can be decomposed into a component 73 orthogonal to the writing surface.   If both shafts 42 and 53 are parallel,
The shear force applied to the metal strip 21 is applied to the surface 48 and the surface 65.
Incline by angle B. Illustrated preferred implementation of the device of the invention
In the example, this angle B is related to the member 10 shown in FIG.
Is equal to the angle A described above.   In the present invention, when the metal is subjected to shear deformation, the zone 68 is thinned.
The amount of flesh is determined by the arrowhead applied to the metal by the pressure roll 52.
It depends on the magnitude of the force in the 71 direction. In light of experience
And T₁The initial thickness of the metal strip, T_TwoThe zone after shear deformation 68
The maximum thinning ratio T_Two/ T₁Is the shear deformed metal
Beyond sin B in preventing cracks or longitudinal flow
Not be. For example, if 50% thinning is needed, sin B
It is possible to form cooperating rolls so as not to exceed 0.5
preferable. To do so, the angle B is 30 ° or less
Must. T_TwoIs T₁ equal to sin B, T₁ sin B
Is T₁ When implementing the present invention to be equal to sin A,
The overall width of the metal band 21 after the shear deformation is almost equal to its initial width.
Almost unchanged. This forms a corrugated metal plate as described below.
This is advantageous when forming.   Subsequent processing indicated by reference numerals 68a to 68c in FIGS.
In the working sections 24-26, the thin zone 68 of the metal strip 21 is slightly
Strips that are widened and ultimately have the desired width of the open leg wall
The material shape is obtained. Preferably completely with the above mandrel 41
The same power-driven mandrels 41a-41c are used for the processing units 24-26, respectively.
Provide. A pair of cooperating pressure rolls for each processing section 24-26
This allows each mandrel to work with
In the same manner as described above in connection with the operation of
The belt 21 is completely deformed and thinned.   In particular, as is apparent from FIG.
Actuator (not shown) similar to actuators 56 and 57
Pressure rolls 51a, 5
Install 2a. Each of the pressure rolls 51a and 52a is
With a frusto-conical machining surface 67a corresponding to the machining surface 67 of
I do. Leads inward in the radial direction from the inner edge 75a of the processing surface 67a.
Weight on the part of the metal strip 21 thinned in the machined part 23
The second surface 70a becomes wider. The second surface 70a is 7
Step back from 5a. That is, adjacent
Only slightly from the surface of the mandrel 41a, for example 0.008-0.013c
m (0.003-0.005 inches) apart. Second surface 70a
Metal is pushed toward the central area where the strip is not thinned.
Prevent it from being returned. The second surface 70a that forms the roll
Formed a slight relief angle, so it was thinned first
The metal is pushed back while avoiding acting on the wall section 68
To prevent   As shown in FIG. 5, the pressure roll 51b in the processing section 25,
52b is the thinned metal in the preceding processing sections 23 and 24.
The flank 70b should be larger than the second surface 70a so that it
Except for the point that it was formed wider, the pressure rolls 51a and 52a in FIG.
Is the same as Similarly, the pressure in the processing section 26 shown in FIG.
The flank 70c of the force rolls 51c and 52c also has
Wide to overlap all of the thinned metal
Has been established.   In many cases, the gradually formed thin zone is substantially uniform
It is desirable to perform shear deformation so as to have a thickness. However
The thickness of the zone due to manufacturing tolerances and multiple passes.
There will be some variation. In some cases,
In order to change the thickness of the zone,
That the width of the "throat" between the lines must change
There is also. Note that the thickness T_TwoIf so, thickness T_TwoThin zone
Contains zones with a completely uniform thickness.   The operation of the device of the present invention is generally clear from the above description.
U. Continuous processing of infinite length metal strip 21 for multiple processing
Pass parts 23-26. In the processing part 23, the metal strip 21
Part 68 interacts with pressure rolls 51,52 and mandrel 46
Bend it out of the original plane and apply a shearing force of 71.
The thickness is reduced by changing the thickness. This shear force is almost
Extends the metal laterally without any stretching, i.e.
Yield to the edge.   In a preferred mode of operation of the device according to the invention, the longitudinal direction of the metal is
Keep angle A constant to avoid flow or cracks,
Thin metal strip to a thickness not smaller than initial thickness x sin A
Become The metal strip moves from one working part to the next
In the process, the pressure roll of the next processing section is still thinned
Metal that is not present and is located near the already thinned zone
As a result, the width of the thinning zone gradually increases.
Finally, it reaches the expected range.   Both pressure rolls of each processing part are symmetrical and almost equal.
Because they apply forces in opposite directions to the metal,
Action provided by the corners of the metal band that engages
Is sufficient to guide the metal strip, and the guide structure is installed separately.
do not have to.   In the case of the embodiment described here, the member 10 forming the metal band is
Since it is roll-formed into a pair shape, the amount of thinning and the thinning zone
The width of the region is uniform. In such a case,
Diagram with a core and frustoconical portions on both sides with equal cone angles
It is preferred to employ the indicated symmetric mandrel. Thinning
Includes two longitudinal zones with different volumes or widths
Such asymmetric members are also included in the scope of the present invention.
In this case, the center is missing or the center is
The mandrel may be formed so as to have a cylindrical shape. Ma
Whether both sides of the mandrel have different cone angles, or
May be non-conical. Furthermore, the mandrel axis
Pressure roll to rotate about an axis that is not parallel to
Hydraulic actuator for supporting and acting on pressure rolls
The angle B by changing the vector direction of the force
May be changed.   The mandrel is driven by a power source (not shown)
Usually it is. Actuator allows pressure low
By adjusting the force applied to the
In this way, the required thickness reduction is achieved.   Preferably, a hydraulic actuator is used.
In addition, the force applied as the thickness of the processing material changes
To provide some spring action so that it does not change
It is preferable to incorporate a simple system into the actuator.
No. For example, mechanically lock shaft 53 in a given position
If the thickness of the metal strip changes only slightly, the force is remarkable.
Fluctuations occur. Pressure roll in response to changes in material thickness
The system that floats the pressure to a certain degree
When a force is applied, the shear force becomes substantially constant, and the shear deformation ratio is reduced to one.
Can be kept constant.   In reality, the amount of thinning performed in each processing section is one
It gradually decreases as one moves from one processing section to the next
It turns out that. The cause is the shearing deformation
Is considered to be due to the work hardening of the metal next to
You. In fact, the metal adjacent to thinning zone 66 is
The thickness tends to increase slightly.   In each processing section, the gold is located
The genus tends to be thick, so it can be extruded laterally,
Causes metal flow and is thinned in the next processed part
It is believed that the metal work hardens to some extent. This processing hardness
As the transition from processing to processing proceeds,
This is considered to be the cause of the gradual increase in thickness.   To overcome this problem of increasing the thickness of thin parts
Is shown in FIGS. 12 to 18 as a second embodiment of the present invention.
A roll forming method may be used.   In this second embodiment, FIG. 15, FIG. 16 and FIG.
Through the first group consisting of three processing parts
The metal strip 21 is fed in so as to pass. The first module shown in FIG.
Also in the engineering section, the mandrel 201 is the mandrel of the first embodiment.
Like the barrel, a cylindrical outer surface 202 and a pair of opposite
It has a similar, frusto-conical surface 203 oriented. However, the drawing
For simplicity, only one surface 203 is shown.   In this embodiment, the pressure roll 204 is
From the cylindrical part 202 of the mandrel by a distance close to the thickness
A cylindrical portion 206 is provided at a remote location. Again, one
Pressure roll 204 presses one side of the metal strip
Roll 204 cooperates with the opposite side of the mandrel.
Mandrel 201 so that the other side of the metal strip is machined
Pair of similar, but oppositely oriented pressures
A force roll 204 is provided.   The distance of the pressure roll 204 from the associated conical surface 203
And a frusto-conical surface 207 whose inner end is connected to the cylindrical surface 206.
Have. Again, the conical surface 207 of the pressure roll 204 and this
And the distance between the adjacent conical surface 203 and the original metal band 21
By setting to be approximately equal to the thickness, the conical surface
207 prevents the metal strip from being thinned.   A truncated cone that extends beyond the conical surface 207 in the radial direction
There is a shaping surface 208 and a front cylindrical surface 20 via a radial surface 207.
Connected to 7. As shown, the conical machining surface 208
The distance between this and the conical surface 203 of the adjacent mandrel 201 is
The desired thickness after thinning, smaller than the original thickness of the metal strip 21
It is almost equal to. The mandrel 201 and a pair of pressure
As in the first embodiment, each rotating about a parallel axis.
The pressure roll has the same piston / piston as in the first embodiment.
It is pushed down by a cylinder type actuator.   The metal strip 21 passes between the pressure roll and the mandrel of the processing section.
In the process, the conical working surface 208
Occlusal with the band, and by changing this part, the ratio
A relatively narrow longitudinal thin bite zone 224 is formed.   Again, the force acting on the metal is
Since the metal strip is made to flow in the lateral direction with almost no flow,
Maintain linearity. In FIG. 15, from the conical portion 208
The upper metal part is a conical part 207 and a cylindrical part 206.
Therefore, the metal of the belt is pushed back because it is almost completely contained.
Is done. That is, the phenomenon of reverse flow is prevented. Therefore,
As a result of the deformation, the strip of metal flows laterally outward.
Move. In this embodiment, the pressure roll is
Comprises a cylindrical part 211 connected to the conical working surface 208 via
Since the flange is provided, the flange is inclined as in the first embodiment.
Not at a right angle to
Become.   As shown in FIG. 16, a pair of pressure locks
Mandrel 20 similar to that of the first processing section together with the tool 204a
1a is provided. The pressure roll 204a is the width of the conical surface 208a
Is different from the roll of the first processing section in FIG.
Become. That is, it is wider than the thin portion formed in the first processing portion.
Adjacent to the thin portion 224 formed in the first processed portion
The strip-shaped material to be deformed in the horizontal direction
Or increase the overall width of the zone. Again, the first of FIG.
Conical machining surface aligned with the thin zone deformed in the machining area
The pushback occurs because the part is virtually restricted
The part of the band that is not newly obtained and processed is the mandrel 201a
Deforms laterally outward along the angle of the conical surface 203a. This
Also in the embodiment of the present invention, the lateral deformation of the strip is
Since there is little movement, the linearity of the band is maintained.   The third processing section shown in FIG.
Increase the width of 224,224a. The pressure roll 204b is configured as shown in FIG.
2 Conical machining surface wider than conical machining surface in machining area 20
8b, so that the material flows more laterally,
The width of the zones 224, 224a is expanded as indicated by reference numeral 224b.
It is. Cold rolling of medium quality steel in light of experience
If the thickness is markedly
Progressive expansion of thin zone without thinning phenomenon
It is sufficient to use three consecutive machined parts to
You. However, if the same progressive processing part is further added,
The amount by which the material becomes thinner can be significantly reduced. Obedience
Jump over the narrow part of the non-working zone of the strip material
To a zone that has not been affected by previous rolling operations
The fourth processing part as shown in FIG.
Is provided.   The pressure roll of the fourth processing section shown in FIG.
Cylindrical surface 206c with the same dimensions as the corresponding surface in the three machined parts, circle
It has a conical surface 207c and a conical surface 208c. But the pressure roll
204c is spaced from the conical surface 208c by the recess 217c.
It has a conical working surface 216c. In this part,
The material is sealed laterally inward, except for the area corresponding to the area.
In the longitudinal direction of the web material, the second thin zone 22
6c is formed. The material of the belt that engages the conical surface 216c
Is the first thin zone because it has not been hardened by then.
As in the case of the pattern, complete thinning is performed.   The strip is then further processed (not shown)
Through the second thin zone in the same manner as the first thin zone.
The width of the 226c is gradually increased by these
Is common. The overall width of the thin zone further jumps
If it is necessary to provide a retreat part in the subsequent processing part,
A second jump to the work hardened part
To   In the embodiment shown in FIGS. 15 to 18, three steps are sequentially performed.
It is assumed that a jump will take place after the next pass.
Depending on the material, final thickness, and required amount of thinning,
The number of steps between jumping may be arbitrarily increased or decreased. Follow
Thus, the present invention is a three-step process without a jump.
It is not limited only to the mode in which the passing is performed.   FIG. 12 is a cross-sectional view of FIG. 1 formed according to the second embodiment.
A band 220 similar to the band shown is shown. Again, a strip
Material has the same thickness T as its original thickness₁Central wall part with
221 incl. Also in this embodiment, the member or the band-shaped gold
The genital belt 220 has a wall portion 222 that opens to the side,
The end of the segment 222 also forms a peripheral flange portion 223.
You. In this embodiment, the pressure roll has a cylindrical surface 211 to 211c.
With these pressure roll cylindrical surfaces, the flange part
The minutes are maintained substantially parallel to the central wall portion 222.   However, in this embodiment, the side split leg wall portions 222
A first thin zone 224-224b and a second thin zone on both sides of the
It has a meat zone 226c. First thin wall in this embodiment
The zones consist of the first three processed parts shown in FIGS.
The second thin zone 226c is formed by
And then gradually expanding the zone (not shown)
It is formed in the processed part. The formation of the rib-like portion 227
Since a jumping up is performed, it is almost
Uniform thinning is achieved and therefore very narrow ribs
Effective thinning is achieved even when
You.   FIG. 13 is an enlarged sectional view taken along a line 13-13 in FIG.
FIG. The two thinning zones 224-224b and 226c
Substantially uniform thickness T_TwoHaving a flange 223 and a central wall portion 221
Remains substantially the original thickness of the band. In addition, the rib-shaped portion 22
7 is slightly fold or buckled. this is,
After jumping during machining in the fourth machining section in FIG.
It is considered that the amount was pushed back. Retreat part 217c
Exists, the metal is complete just behind the conical surface 216c.
Because it is not completely blocked, some pushback occurs
You.   FIG. 14 shows a state where the buckling phenomenon easily occurs at the rib-shaped portion 227.
I show you. As can be clearly seen from this figure, the buckling
Herring bob with bent portion 31 inclined and overlapping
This is likely to occur in the pattern Therefore, as shown in FIG.
Buckling is an irregular thing even in the herringbone pattern
is there. In the buckling part, such a herringbone putter
Appears because of the thinning that takes place before jumping
It is thought to be due to residual stress in the material. Buckling
When this occurs, these internal stresses are released and the rib-like
A herringbone pattern is formed on portion 227. rib
The shape is somewhat irregular, but along the thinner part of the metal.
As a result, a desirable reinforcing effect is exhibited.   In one embodiment of the invention, the width is 6.500 cm (2.559 inches),
Roll a 0.038 cm (0.015 inch) thick strip at room temperature. This
Material is pre-painted and cold rolled to normal quality
It was steel. This is lubricated by applying oil soap
And thinned by a 12-step shear deformation process to form two
Formed. Each thin zone has a thickness of 0.023 cm (0.009 cm)
Inches) and 2.32 cm (0.915 inches) wide. angle
A is 28mm, thinning rate is about 40%, between edges of rolled strip
The surface width was 8.382 cm (3,300 inches).   In another embodiment of the present invention, an unpainted, 5.99 wide
2 cm (2.359 inch), 0.058 cm (0.023 inch) thick pole
The soft band aluminum is rolled at room temperature. For shear deformation of strip aluminum
Therefore, by reducing the wall thickness, it is possible to keep
Two thin zones were formed. Each zone has a thickness of 0.038c
m (0.015 inch), width 2.32 cm (0.915 inch)
Was. The angle A was 28 °, and the thinning rate was about 35%.   In any of the above examples, T_Two/ T₁Ratio is greater than sin A
No. Therefore, thinning was achieved by shear deformation. Toko
However, in another embodiment, it is greater than the ratio given by sin A
Was obtained. In such an example, the original thickness 0.03
3cm (0.013 inch) normal quality steel strip in the second embodiment
Therefore, it was rolled at room temperature. Again the roll cone angle is 28 ゜
Met. The thickness of the first thin zone 224,224c is from 0.0071 to
0.012 cm (0.0028 to 0.0046 inches) in the second zone 226
0.0086 to 0.015 cm (0.0034 to 0.006 inches) thick
there were. In this example, T_Two/ T₁The ratio is about 21% to 46%
Was. Therefore, the amount of thinning significantly exceeded sin 28 ゜. So
However, no cracks or fractures of the metal were seen, and the band showed its linearity.
Did not lose.   In this case, the initial deformation is only shear deformation, and sin
Despite metal movement of A or more,
It is considered that there was no longitudinal flow to impair linearity.
available. Therefore, almost no deformation beyond pure shear deformation
All were lateral deformations.   The occurrence of such a lateral metal flow is shown in FIG.
Roll and metal strip contact area along deformation zone 241 as shown
Is longer than the width in the horizontal direction indicated by W;
Due to the fact that it is much longer in the hand direction. As shown
In addition, the length L was at least three times W. Strip material
The working contact area between the roll and the
In such cases, which are relatively long and short in the lateral direction,
Relatively low resistance to lateral deformation
However, deformation in the longitudinal direction is suppressed. As a result,
Even if a force greater than the force that generates
Also, even if the thinning rate becomes larger than sin A,
Mostly deform only in the horizontal direction. But often, especially,
For forming a longitudinal thin zone on a relatively thin metal plate
Thickness, so that shear deformation can be performed relatively easily.
must be equal to or greater than sin A
Should be set.   FIGS. 7 and 7a show a suspension ceiling and the like of the present invention.
A lattice T-section 80 is shown. Each child T-shape has a central web 81
And a reinforcing spherical portion 82 along the upper edge of this web 81
And panel supports extending to both sides along the lower edge of web 81
In order to form the holding flanges 83 and 84,
It is bent. The special lattice T-shaped member shown in FIG.
Separate flange on the side of the flange opposite the web 81.
Attach top 86. However, without the need for a separate cap,
The entire lattice T-section is formed by simply bending a single strip of metal
In many cases.   The grid T-shaped member 80 is the member 10 in FIG. 1 or the member 220 in FIG.
It is preferable to form it from an elongated member cold-rolled as in
New In this case, the entire spherical portion 82 is made of the material of the central portion 11.
Formed, thickness T₁Forming a grid T-shaped member 80 having
Preferably. In contrast, the two layers of web 81 are open.
It is formed of the material of the leg wall parts 12, 13 and the thickness of each layer is T_TwoIn
You. The flanges 83 and 84 are the same as the flanges 16 and 17 of the elongated member 10.
And the thickness is T₁Good to be equal to
Good.   By the above-described deformation, the simple zone in which the thin zone is formed in advance
From a single metal strip, a grid T-shape can be roll-formed in this way.
With this, metal is applied to the spherical part and the flange end of the lattice T-shaped member.
Concentrated to produce a grid T-shaped material with a reduced amount of metal on the web
Can be built. As mentioned, Webb is
Two components that make up the web because it does not contribute much to the building strength
Almost no loss of structural strength by thinning the layers
And save metal. For example, spherical part 82
Is about 1/4 inch wide and about 1.27 cm (1/2 inch) high
Web height is about 2.5cm (1 inch), total flange
In the case of a grid T-section with a width of less than 2.5 cm (1 inch), the grid T
The width of the single metal strip required to form the profile is approximately 11.4 cm
(4.5 inches).   Thickness of metal used to form the main structure of the grid
If formed uniformly, the total amount of metal per unit length of the metal strip
About 4.5 times the thickness of If the web is spherical and
If it is formed to a thickness equal to 1/2 of the thickness of the flange, T-shaped
The width of the metal strip required to form the material is about 8.9 cm (3.5 inches)
Therefore, the total amount of metal per unit length is about 3.5 times the initial thickness.
Equivalent to. Therefore, the amount of metal in the thin metal strip of the web is
The thickness of the web also forms a uniform grid T-shape with the rest.
3.5 ÷ 4.5, or about 78% of the amount of metal required for
Thus, the savings from such a structure are about 22%.   The amount of metal saving depends on the amount of thinning and the width of the thinned part.
It is determined. In the above example, if the thinning amount is 50%, 22%
Savings are obtained. Reduced% thinning in given case
Doing so will also reduce metal savings.   Another feature of the present invention is that a pre-coated
Strip metal that has been deformed without destroying the coating.
Can be made. For example, pre-coated
It is common to form lattice T-shaped members from metal and experience
Light, coated with paint or hot-dip galvanized zinc
These coated metal strips, which are often
Processing without shearing the coating without breaking it.
Often a thin zone by shape can be formed. Especially 7a
As is clear from the figure, shear deformation and lattice T-shaped
The coatings 87 and 88 applied prior to
The original thickness is maintained in the zone that is not covered. However, c
The thickness of the coating 87, 88 along web part 81
As shown by reference numbers 87a and 88a,
Thinner than the coating thickness along.   The ability to make coated metal thinner means
This is extremely important when manufacturing many structures.
Because the metal that forms the structure is flat
This is because it is easier to mold after coating.
In addition, the coating is fired on a pressure roll or mandrel.
Metal, because it tends to reduce sticking or "galling"
Surface coating often facilitates thinning
No. However, in many cases, the presence of coolant and lubricant
Therefore, it is desirable to perform a thinning process.   Furthermore, when the longitudinal portion of the metal is thinned,
This has the effect of increasing the hardness, which is also
Is an advantage. For example, the grid T in FIGS. 7 and 7a
In the profile, the web layer is thinner than the rest of the grid
Is hardened by shear deformation,
Compensate for the intensity drop to some extent. Also, often continuous
To connect with the lattice T-shaped member,
Provide connectors at both ends of the web. For example, in the present specification
U.S. Pat.Nos. 3,501,185 and 4,108,563 also citing
The invention disclosed in each of No.
And separate connector riveted to the web
doing. Because the web is hardened, even if the web
Provides sufficient strength even when the metal is thinned.   8 and 9 illustrate other alternatives that can be formed in accordance with the present invention.
2 shows a structural element. FIG. 8 shows an example of a dry wall (dr
6 shows a channel member that can be used as a stud for y wall).
This member consists of a central web 91 and a flange
92 and 93 are formed. In particular, as apparent from FIG.
And the thickness T of the flanges 92 and 93₁Is the central part 9 of Web 91
Except for 4, the thickness of the web T_TwoApproximately twice. This
Again, the web is thinner, forming a channel
As metal concentrates on the flange providing maximum strength
Form a structure.   The channel-shaped member as shown in FIG.
May be formed in the same manner as the elongated member of
Inside the mandrel that supports the metal band (shown in Figure 8a)
The web 91 is formed to be thin over almost its entire length.
Thus, a narrow central portion 46m is formed. FIG. 8 channel member
Does not disclose the coating, but such grooves
Shaped members can also be formed of coated metal
You. The coating is the grid T-shaped member of FIGS. 7 and 7a
In the same manner as in, the thickness is reduced simultaneously along the thin zone. Strange
When the shape is completed, a groove is formed by known rolling.
You.   FIG. 9 shows an example of a dry wall stack.
H-beam or I-beam that can be used as C101
2 shows a structural element. This stud is
Thickness T₁Thicker T, much thinner than_TwoIncluding the central web 102
No. Again, the metal that forms the stud 101 has the maximum strength
Concentrate along the flanges,
About is achieved. The H-shaped stud 101 is shown in Fig. 8a.
After the preliminary thinning, a well-known rolling process is performed.
To give the shape of the stud
Just do it. Again, coated as needed
Using thin material, thin coating in the process of deformation processing
It can be left as it is.   10 and 11 show a new and improved corrugated plate structure element.
And an apparatus for manufacturing the same. The elongated wavy structure element 111 is the first
It has a cross section as shown in FIG. This structural element
Initial thickness T of the band material that is the forming material₁Upper and lower flat parts with
Includes minutes 112,113. The upper and lower flat parts 112 and 113 are inclined
Connected via webs 116 and 117 and webs 116 and 117
Has a thickness T₁Much thinner than
Thickness T_TwoIt has been thinned.   As already mentioned, the inclination angle 2A between the open leg walls 16 and 17 is about 6
If 0 ゜, according to the sine law, T_TwoIs about 1 / 2T₁Becomes This
Since the thickness relationship described above is satisfied, the corrugated sheet shown in FIG.
11 It is preferable to form it gradually by the device schematically shown in FIG.
No. In this device, separate
And a pressure roll on each mandrel 118
Make 119,120 work together. FIG. 11 shows one processing part.
Although only the illustration is shown, it is
The width of the thin wall is gradually increased until the width shown in Fig. 11 is reached.
I can.   The upper flat portion 112 remains at the initial width and the lower flat portion
As the width of the thin wall increases, the width of the
Gradually decreases until the width becomes 113. During this process, thinning
Progresses according to the above-mentioned sin A law,
The width is unchanged. For example, the initial width of the metal band is 122 cm (4
Feet), the resulting corrugated sheet width is the web width
122cm even if it inclines with respect to the upper and lower parts 111 and 113
(4 feet). Also, according to sin A's law,
When thinning occurs, the spacing between adjacent mandrels should be
It is constant during the process.   In some cases, form a corrugated sheet as shown in FIG.
It is desirable to obtain individual corrugated pieces by shearing
Good. As already mentioned, gold that is thinned in the longitudinal direction
The genus is often an intermediate product, and this intermediate product
The final structural element is roll-formed using.   The preferred embodiment of the present invention has been described above.
The present invention disclosed in the detailed description and described in the claims
Various changes and components without departing from the scope of the description.
Can be rearranged.   The details of the present invention will be described below with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a portion of an elongated metal strip of the present invention having a thinned longitudinal portion, and FIG. 2 forms the metal strip shown in FIG. 3, 4, 5, and 6 schematically show the formation of the strip shown in FIG. 1 in a simplified sectional view corresponding to the sectional lines of FIG. 2. FIG. 3a is an enlarged partial sectional view of a part of the structure shown in FIG. 3, and FIG. 7 is an enlarged partial sectional view of the structure shown in FIG. FIG. 7a is an enlarged partial cross-sectional view of the lattice T-section shown in FIG. 7, FIG.
FIG. 8a is a partial cross-sectional view schematically illustrating a partially modified device showing the shear deformation used to form the groove shape of FIG. 8, FIG. FIG. 10 is a cross-sectional view of an H-shaped stud of the present invention, FIG. 10 is a cross-sectional view showing a part of a corrugated metal plate of the present invention, and FIG. Fig. 12 is a perspective view showing a part of an elongated metal strip similar to the strip shown in Fig. 1 but manufactured according to the second embodiment of the present invention; FIG. 14 is an enlarged partial cross-sectional view taken along the line 13-13 in FIG. 12. FIG. 14 is a herring occurring along two adjacent thin sections or non-thin sections located between zones. FIG. 15 is an enlarged view of a portion surrounded by a circle in FIG. 12, showing a bone-shaped structure. FIG. FIG. 16 is a partial cross-sectional view schematically illustrating a processed portion, FIG. 16 is a partial cross-sectional view schematically illustrating a second processed portion according to a second embodiment of the present invention, and FIG. FIG. 18 is a partial cross-sectional view schematically illustrating a processed portion, and FIG. 18 is a partial cross-sectional view schematically illustrating a fourth processed portion in which formation of a cooperative second thin zone is started after jumping over a non-thinned portion of the strip. FIG. 19 is an enlarged view of a deformation zone in which a roll deforms a strip-shaped metal. 10 Metal band, 12, 13 Left and right wall parts 14, 16 Edge flange, 23 to 26 Processing part 41 to 41c Mandrel, 42 Shaft, 47 Mandrel 51, 52 ... pressure roll, 220 ... metal strip 222, 224 ... open leg wall

──────────────────────────────────────────────────の Continuation of the front page (72) Inventor Alvarez, Dennis Ay. United States, 44123 Ohio, Euclid, Ivan Avenue 21574 (72) Inventor Soua, Gail United States of America, 14772 New York, Sinclair Bill, Demon Hill Road Box 330-A, Route 1 (72) Inventor Joseba, Joseph A. United States, 44092 Ohio, Willoughby Hills, White Road 31849 (56) References Real Open Showa 59 -167119 (JP, U) US Patent 3,792,602 (US, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B21D 5/08

Claims (1)

(57) [Claims] A metal plate having a substantially infinite length, which is formed by rolling by a roll at room temperature than the metal strip elongate having a substantially uniform first thickness T ₁ (10 or 220) a first longitudinal portion spaced from both edges of the metal strip having a uniform thickness T ₁ of the first (17, 18) (11 or 2
21), and second and third longitudinal portions (12, 13 or 222) on each side of the first longitudinal portion, wherein the second and third longitudinal portions (12 , 13 or 222)
At least one of the plurality of portions (6
8, 68a, 68b, 68c), which cooperate to form at least one longitudinal portion of the second and third longitudinal portions, wherein the second and third longitudinal portions A portion having a thickness less than the thickness of the first longitudinal portion and a width of the second and third longitudinal portions being equal to a sum of widths of the plurality of adjacent narrow portions; A third longitudinal portion (12, 13 or 222) is inclined with respect to said first longitudinal portion (21, 221) and at an angle A with respect to a plane perpendicular to the first longitudinal portion (11 or 221). Cold-rolled metal sheet characterized by the fact that: 2. The second and third longitudinal portions (12, 13 or 22)
2. Cold-rolled metal sheet according to claim 1, wherein the thickness of 2) is at least equal to the thickness of the first longitudinal section (11 or 221) times the thickness of sinA. 3. 4 wherein the metal plate (220), which is arranged on the opposite side of the first longitudinal portion of said first has a thickness T ₁ and the sides of the second and third longitudinal portion of the The cold-rolled metal sheet according to claim 2, further comprising a fifth portion (227) and a fifth portion (227). 4. The fourth and fifth portions (227) are spaced apart from the first longitudinal portion along a lateral direction, and the second and third longitudinal portions are separated from the first, fourth, and fifth longitudinal portions. Claim 3 characterized by being harder than the portion of
A cold-rolled metal sheet according to item 6. 5. The long metal plates have flanges (14, 1
6 or 223), wherein each of the flanges is spaced apart from the first longitudinal portion (11 or 221) by each of the inclined second and third longitudinal portions (12, 13 or 222). 5. The cold-rolled metal sheet according to claim 4, wherein the metal sheet is connected along the set edge. 6. The inclined second and third longitudinal portions (12, 1
The first longitudinal section (11) adjoining 3) is substantially flat and the flange (14, 16 or 223)
6. The cold-rolled metal sheet according to claim 5, wherein the metal sheet is substantially perpendicular to the corresponding inclined second and third longitudinal portions. 7. The metal plate (10 or 220) has a first thickness along a first longitudinal section and a reduced thickness along the inclined second and third longitudinal sections. 6. Cold rolled metal sheet according to claim 5, characterized in that it comprises a coated part (87,88) having 8. A suspended ceiling grid having a central web (81), a spherical portion (82) formed on one edge of the web, and a flange (83,84) along the opposite edge of the web. A T-shaped member (80) is formed by bending the metal plate (21), and the spherical portion and each flange are formed of the metal of the first longitudinal portion having the first uniform thickness. 4. The method of claim 2, wherein said web is formed of said second and third longitudinal portions of metal having said second thickness less than said first thickness. A cold-rolled metal sheet according to item 6. 9. A coating extends at least along an outer surface of the grid T-section and further includes a first thickness portion along the spherical portion (82) and the flange (83,84), and a web (81). 9. The cold-rolled metal sheet according to claim 8, wherein the metal sheet has a thickness reduced along the thickness of the metal sheet. 10. A first laterally spaced and substantially parallel portion (112), wherein the metal plate is bent to be laterally spaced and substantially parallel and provided in a first plane; And provided in a second plane substantially parallel to the first plane,
A corrugated form having a second longitudinal portion (113) laterally spaced and a folded web portion (116, 117) connected to adjacent edges of the first and second portions. Formed on a metal plate (111), wherein said web portion is inclined at an angle A with respect to a plane perpendicular to said first and second portions, substantially equal to the thickness of said first and second portions times the thickness of sinA. Claim 8 characterized in that it has a thickness equal to
A cold-rolled metal sheet according to item 6. 11. The elongated metal band (21) is tangentially passed between a rotating mandrel device (41) and a rotating pressure roll device (51, 52), and the mandrel device and the pressure roll device pass the metal band. Engagement with each of these devices only along zones adjacent to each other, with the mandrel device and the pressure roll device being narrow relative to the metal strip in a direction substantially aligned with the length of the metal strip. Along the zone, a deforming pressure is exerted on the metal strip, thereby producing a transverse metal flow in the metal strip without intersecting the longitudinal metal flow causing buckling. And a laterally flat first member having a substantially uniform thickness over its entire width.
And a tangent line between the rotating mandrel device (41a) and the rotating pressure rolling device (51a, 52a), which is another pair of the mandrel device and the pressure rolling device. Through,
Thereby, a subsequent inclined bending deformation stress is applied to the metal band along the stretched and deformed lateral narrow zone of the first thin portion (68), and the metal band is buckled. A laterally flat second thin-walled portion having a substantially uniform thickness over its width without causing a longitudinal metal flow along the lateral direction thereof 68a) to form a continuous thin portion extending in the longitudinal direction in the metal strip. 12. Limiting the metal strips (21) along one side of each deformed zone to limit lateral metal flow toward one side of the metal strip, such that the metal follows the metal strips 12. The cold rolling forming method according to claim 11, further comprising the step of flowing laterally toward the other side of each deformation zone. 13. Wherein said first and second portions (68, 68a) are thinned, substantially continuous portions laterally adjacent to each other and having a width substantially equal to the sum of the widths of said portions. The cold-rolling forming method according to claim 11, wherein the cold-rolling forming method is characterized in that: 14． The first and second parts (224 to 224b, 226)
12. The cold rolling forming method according to claim 11, characterized in that only the parts of the metal strip which substantially retain the initial thickness are laterally separated by (227). 15. 2. The method according to claim 1, wherein the deformation pressure is inclined laterally with respect to the adjacent surface of the metal strip, and the metal material flows laterally with bending deformation.
Item 12. The cold forming method according to item 11. 16. The mandrel device (41) has a non-conical portion (4
6) In the same and opposite conical sides (47,4)
8), the step of applying a deformation pressure to the metal strip by the mandrel device and the pressure roll device (51, 52). The metal strip (21) using the conical sides (47, 4).
8), exerting an equal shearing force on the metal strip inclined with respect to the conical sides (47, 48), the first of the metal adjacent one of the conical sides (47). Forming a thinned portion (68) and a corresponding thinned portion (68) adjacent the other side (48) of the cone;
The same pressure roll device (51a, 52a) is used to pass through a similar mandrel device (41a) provided with opposing conical sides (47, 48), and the conical shape of the mandrel device (41a) A second thin portion (68a) adjacent one of the sides (47,48) and a corresponding thin wall adjacent the other of the conical sides (47,48) of the mandrel device (41a); 12. The cold forming method according to claim 11, comprising the step of forming a portion (68a). 17． The mandrel device (41) is provided so as to rotate around an axis (43) and has opposed inclined surfaces (47, 48) for pressing the metal band against the metal band, and the metal band is pressed against the inclined surface. Claim: wherein the metal strip is guided by providing the deformation and providing a corner on the mandrel device which engages a corresponding corner of the metal strip (21). Item 12. The cold rolling method according to item 11. 18. The first thin portion (68) and a similar thin portion (68a) laterally spaced from the first thin portion (68)
Cold-rolling forming method according to claim 11 or 16, characterized in that by simultaneously reducing the respective thicknesses, the force acting on the metal strip is substantially equalized. . 19. The metal strip (21) is continuously formed, and the thin portion is made of a non-thin flange (83, 84) and a non-thin spherical portion (8).
17. The cold-rolling forming method according to claim 11, wherein a suspension T-shaped grid T-shaped member (80) forming a web portion (81) located between the cold-rolled portion and the web portion (81) is formed. 20. The metal strip (21) is subsequently formed to form a structural member (101) in which the thin portions are located along the stress reduced zone and the non-thin portions are located along the more stressed zone. 17. The cold-rolling forming method according to claim 11, wherein 21. A patent comprising applying a coating (87,88) to the metal strip prior to forming the thinned portion and simultaneously thinning the coating and the thinned portion without substantial damage to the coating. Claim 11
Item 18. The cold-rolling forming method according to item 16 or. 22. Having said metal strip (21) is the initial thickness T _1, the deformation pressure, a the cold forming method according to paragraph 15 claims to be inclined at an angle B, and the deformation pressure, the The pressure is applied to a plane substantially perpendicular to the length of the metal strip so that the pressure does not have a significant longitudinal component, whereby a substantially longitudinal length of the laterally adjacent portion of the metal strip is added. By causing bending deformation of the metal band and resulting in thinning without causing deformation and substantial thinning, and controlling the amount of deformation pressure supplied to the metal band, the thinned portion (68) ) of thickness T _2, at least the initial thickness T ₁ × si
16. The cold-rolling forming method according to claim 15, comprising a step of making nB equal to nB. 23. The first thin portion (68) and a similar thin portion (68a) laterally spaced from the first thin portion (68)
23. The cold rolling forming method according to claim 22, wherein by simultaneously reducing the thickness of each of the above, the forces acting on the metal strip are substantially equalized. 24. The mandrel device (41) is provided so as to rotate around an axis (43) and has opposed inclined surfaces (47, 48) for pressing the metal band against the metal band, and the metal band is pressed against the inclined surface. Claim: wherein the metal strip is guided by providing the deformation and providing a corner on the mandrel device which engages a corresponding corner of the metal strip (21). Item 22. The cold rolling method according to Item 22. 25. The metal strip (21) is continuously formed, and the thin portion is made of a non-thin flange (83, 84) and a non-thin spherical portion (8).
23. The cold-roll forming method according to claim 22, wherein a suspended T-shaped grid T-shaped member (80) forming a web portion (81) located between the cold-rolled portion and the web portion (81) is formed. 26. The metal strip (21) is subsequently formed to form a structural member (101) in which the thin portions are located along the stress reduced zone and the non-thin portions are located along the more stressed zone. 23. The cold rolling forming method according to claim 22, wherein 27. A patent comprising applying a coating (87,88) to the metal strip prior to forming the thinned portion and simultaneously thinning the coating and the thinned portion without substantial damage to the coating. Claim 22
The cold-rolling forming method according to the above item. 28. A mandrel (41) pivotally supported about a first axis (43) and providing opposing conical surfaces (47,48) and a central portion (46) continuous with said conical surface; A pressure roll device device (5) to provide a similar but reactive orientation substantially adjacent each of said conical surfaces.
1,52), and a pressure device (56,57) operable to exert a force on the pressure roll device in a direction inclined with respect to the conical surface, Wherein the mandrel and the pressure roll device cooperate when a piece of a long metal strip (21) is longitudinally passed therebetween to exert a substantially equal force on the metal strip. And bending the longitudinally extending portion of the metal strip along each surface of the cone, with only a small portion of the longitudinally extending portion with substantial longitudinal deformation. A cold rolling forming apparatus for reducing the thickness of the metal strip without reducing the thickness of the metal strip. 29. 29. The cold rolling forming apparatus according to claim 28, wherein the pressing device (56, 57) exerts an elastic force on each of the adjustable peripheral portions. 30. Substantially similar mandrels (41a, 41b, 41c) and pressure rolls (51a, 51b, 51c) are provided, thereby progressively bending the metal adjacent each of the longitudinally extending portions. 30. The cold rolling forming apparatus according to claim 29, wherein the width of the portion extending in the longitudinal direction is increased. 31. 30. The cold rolling forming apparatus according to claim 29, wherein said first and second axes (48, 54) are in a single plane and are substantially parallel.