CN112642898A - Cold roll forming method for special-shaped rod with mounting groove - Google Patents
Cold roll forming method for special-shaped rod with mounting groove Download PDFInfo
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- CN112642898A CN112642898A CN202011520447.3A CN202011520447A CN112642898A CN 112642898 A CN112642898 A CN 112642898A CN 202011520447 A CN202011520447 A CN 202011520447A CN 112642898 A CN112642898 A CN 112642898A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
Abstract
The invention aims to provide a cold-bending forming method of a dovetail mounting groove and a cold-bending forming method of a special-shaped rod with the dovetail mounting groove. The raw material steel plate is processed into the special-shaped rod with the dovetail mounting groove in a cold roll forming mode, the manufacturing process of the raw material steel plate is simple, the cost is low, the steel plate is formed only in an extrusion bending mode, the material is not required to be heated and cooled, and the energy consumption is saved; meanwhile, the bending process is decomposed into a plurality of passes for processing, and a fillet is formed at the bending position, so that the residual stress in the material in the bending process is effectively reduced, the steel plate material is prevented from twisting or breaking at the bending position, and the formed special-shaped rod with the dovetail mounting groove is ensured to be accurate in shape and size and have higher strength and good bearing capacity.
Description
Technical Field
The invention relates to the field of cold roll forming of steel pipes, in particular to a cold roll forming method of an installation groove and a cold roll forming method of a special-shaped rod comprising the installation groove.
Background
Cold roll forming is a process technique for continuously and transversely bending a metal plate strip by a plurality of forming rollers arranged in sequence to manufacture a section with a specific section. The cold roll forming is a material-saving, energy-saving, efficient, advanced and applicable metal forming process, is an important field of deep processing of plate and strip materials, has high production efficiency, good product quality, small influence on the performance of materials, is easy to realize production automation, is suitable for large-scale production operation, is suitable for manufacturing various types of cold-rolled section steel, and has rich raw material sources. The cold bending forming equipment can produce cold bending sectional materials with complex sections and various varieties, which are difficult to produce by common hot rolling, so that the maximum rigidity and strength can be obtained under the condition of minimum metal consumption; in mass production, the forming roll costs less than the die, but has a much longer service life than the die. The roll bending forming process is also the main processing method of cold-formed steel, and a group of longitudinally arranged rolls are used for gradually deforming a flat original plate to enable the flat original plate to reach a shape suitable for use requirements; the cold-bending formed product has smooth surface, good appearance and accurate size, the length can be flexibly adjusted according to the requirement, and the product is supplied according to fixed length or multiple length, so that the utilization rate of the material is improved; the production can be matched with the procedures of punching and the like to meet different requirements.
The invention discloses a cold roll forming process of a high-strength steel square rectangular tube in the invention patent application with the application publication number of CN110871219A, which is used for processing a high-strength steel plate belt into the high-strength steel square rectangular tube, dividing the high-strength steel plate belt into a left upper section, a left side section, a lower section, a right side section and a right upper section along the width direction of the high-strength steel plate belt according to the side length of the square rectangular tube, and sequentially performing the following steps: bending the left upper section and the right upper section to a specified angle; bending the left side section and the right side section to a specified angle; simultaneously bending the left upper section, the left side section, the lower section, the right side section and the right upper section to a specified angle; welding the left upper section and the right upper section, and bending the left upper section and the right upper section simultaneously to ensure that the left upper section and the right upper section are in an aligned state; and shaping the semi-formed high-strength steel square rectangular pipe.
The mounting groove is as a common installation cooperation structure in the machine-building field and the industrial building field, has effects such as good direction and cooperation locking, simultaneously because the characteristic that has the triangle-shaped structure in mounting groove self shape for its support capacity of the member that is provided with the mounting groove, anti ability of buckling can be effectively strengthened, by wide application in all kinds of products.
The connecting structure of the mounting groove stand column disclosed in the patent document with the publication number of CN201963652U of Chinese utility model comprises a mounting groove stand column and a connecting plate, wherein the side surface of the mounting groove stand column is provided with a mounting groove, one end of the connecting plate is provided with a tenon, and the tenon is matched with the mounting groove. The utility model discloses owing to adopted above-mentioned technical scheme, the cooperation through the tenon on the connecting plate and the mounting groove of mounting groove stand can be connected the polylith connecting plate, and is simple and convenient to install.
The invention aims to provide a method for quickly and efficiently forming a dovetail-shaped mounting groove on a substrate through a cold-bending forming process, and also provides a cold-bending forming method with a special-shaped rod of the mounting groove.
Disclosure of Invention
The invention provides a mounting groove and a cold-bending forming method of a special-shaped rod with the mounting groove, which can effectively avoid the fracture of a steel plate in the cold-bending process, accurately position each mounting groove and improve the processing and forming efficiency and precision.
The technical purpose of the invention is realized by the following technical scheme:
a cold roll forming method of a special-shaped rod with a mounting groove is characterized in that: the cold roll forming method of the special-shaped rod with the mounting groove comprises the following steps:
s1, forming a base groove: form the bellied basic groove to base plate one side through the processing of first compression roller subassembly on the base plate, the basic groove includes the connecting wall that parallels with the base plate and is connected respectively the mounting wall of connecting wall both ends and both sides base plate, be formed with first dog-ear between connecting wall and the mounting wall, be the acute angle between the wall of first dog-ear both sides, be formed with second dog-ear between mounting wall and the base plate, also be the acute angle between the wall of second dog-ear both sides, the width that forms an internal connection wall is greater than the basic groove of the interval between first dog-ear and the second dog-ear.
Preferably, the method further comprises the following steps:
s2, forming a mounting groove: sequentially carrying out extrusion bending treatment on a first bending angle part or a second bending angle part on the base groove from inside to outside through a second pressing roll assembly with the surface containing a circular arc-shaped curved surface, so that the bending angle contained in the first bending angle part becomes a round angle, and an inner rotary part is formed; the bending angle included in the second bending angle part is also rounded to form an outer turning part, so that the base groove is made into an installation groove.
Preferably, the method further comprises the following steps:
s2, forming a mounting groove: comprises the following steps:
(S2a) simultaneously performing an extrusion bending process on a first corner portion and a second corner portion connected to a mounting wall of a base groove by a second press roll assembly including inner and outer rolls alternately arranged with respect to the mounting wall, the inner and outer rolls having curved surfaces in the shape of circular arcs so that the first corner portion is rounded to form an inner turn portion; the bending angle included in the second bending angle part becomes a round angle to form an inner rotary part;
(S2 b) repeating the step S2a on the other side of the base groove, and forming the base groove into a mounting groove.
Preferably, the method further comprises the following steps:
s3, forming a turning bent part: the substrate main body connected with two ends of the connecting plate on the mounting groove is extruded and bent by a third compression roller assembly to form a rotary intersection angle, and a steering bent part is formed between the rotary intersection angle and the outer rotary part; the turning bending part, the cross rotation angle, the part of the base plate connected to the cross rotation angle and the mounting groove on two sides of one mounting groove form a mounting groove unit on the special-shaped rod together.
Preferably, the method further comprises the following steps:
and S4, repeating the steps S1-S3 on the substrate until the mounting groove units on the substrate are completely molded, and the two end parts of the substrate are close to each other to abut against and joint or form a gap.
Preferably, the number of the mounting grooves included in the profiled bar to be finally molded is an integer N, and the width of the substrate is D, so that the width of the substrate to be processed included in each mounting groove unit is D/N; step S1a is added before step S1, and step S1a is as follows:
s1a, dividing a processing section: dividing the substrate mark into N processing sections with the width of D/N, selecting one processing section on the substrate, and positioning and forming a base groove at the center of the processing section through the processing of a first compression roller assembly; the size of the cross rotation angle is 180 DEG/N.
Preferably, the first press roll assembly includes a plurality of press rolls, the distance between the press rolls is variable, the substrate is symmetrically pressed and bent from the center to both sides, and a plurality of mounting grooves are formed on the substrate and are bilaterally symmetric with respect to the center line of the substrate.
Preferably, the first and third roller assemblies include a pair of rollers which are bilaterally symmetrical, and the distance between the two roller assemblies is variable, and the third roller assembly presses and bends the substrate from the outside to the center of the substrate to form the intersecting rotation angles connected with the mounting groove and form the mounting groove unit.
As a preference for the present invention, a step of shaping and deforming the profile rod is added at the end of the cold roll forming method.
In summary, the invention can achieve the following beneficial effects:
1. compared with a cold-drawing forming process, the method for manufacturing the mounting groove by extruding, bending and processing the substrate by using the compression roller does not need a preliminarily formed pipe body as a required raw material, so that the space occupied by the raw material in the transportation and storage process is greatly reduced, the transportation and storage efficiency is improved, and the expenditure cost in the process is reduced; compared with the common bending process, the steel plate does not need to be heated and can be effectively prevented from being broken and damaged at the bending angle position.
2. In the mounting groove cold roll forming process method, the base groove serving as the mounting groove manufacturing basis is formed on the substrate by utilizing the compression roller, so that the position, shape and size of the base groove can be conveniently preliminarily positioned and measured after the base groove is formed, and the accumulated error generated in the subsequent forming process is reduced.
3. In the mounting groove cold-bending forming process method, the substrate is bent through the first compression roller assembly to form a base groove which protrudes outwards, the width of the connecting wall in the base groove is smaller than the distance between the second bending parts connected with the substrate on the left side and the right side, so that the base groove is in a shape with a large inside and a small outside, and the first bending parts and the second bending parts are extruded and bent through the second compression roller assembly to form inner rotary parts and outer rotary parts. The method separates the step of forming the fillet from the step of forming the base groove, can process the same base groove by adopting compression rollers with different dimensions to form arc-shaped bending angles with various shapes and sizes, can process the base groove on the same base plate in a segmented mode, can enable the finally formed special-shaped rod piece to comprise the arc-shaped bending angle with storage dimensions, so as to meet different use requirements, and further improves the variety of the special-shaped rod produced under the method.
4. In the cold-bending forming process method for the special-shaped rod with the mounting groove, the base groove and the mounting groove units on the substrate are formed in a one-by-one cold-bending mode, and the shape and the size of each formed mounting groove unit and the distance between the two mounting grooves can be accurately guaranteed.
5. In the cold roll forming process method for the special-shaped rod with the mounting groove, when the base groove which is used as the base for manufacturing the mounting groove is manufactured, the base grooves which are symmetrical left and right relative to the central axis of the base plate are formed from the central part of the base plate to two sides in a machining mode, so that the positions of the formed base grooves are more accurate, the stress balance of the base plate during machining is ensured, and the base groove which is unqualified in shape and size and is caused by the inclination or the deviation of the base plate is avoided.
6. According to the cold-bending forming process method for the special-shaped rod with the mounting groove, the steering bent parts are symmetrically formed on the base plate by performing extrusion bending treatment from two ends of the base plate to the center, so that the stress balance of the base plate during processing is ensured, and the steering rotary part with unqualified shape and size caused by inclination or deviation of the base plate is avoided; meanwhile, the method for forming the turning bending part enables the base plate part serving as a processing base to be located on the same plane every time, and the difficulty of processing and forming is greatly reduced.
7. The special-shaped rod after the cold bending treatment process is processed through the trimming equipment, the special-shaped rod is further positioned and trimmed by penetrating the special-shaped rod through the shaping hole in the die with the accurate cross section shape, the shape error brought in the extrusion bending process is reduced, and the standardization degree of a product is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a profiled bar with an installation slot;
FIG. 2 is a schematic view of the structure of each part in the base groove;
FIG. 3 is a schematic view of the base groove being forced by a second roll assembly;
FIG. 4 is a schematic view of the structure of each part in the mounting groove;
FIG. 5 is a schematic view of a heel portion of the mounting groove unit;
FIG. 6 is a schematic cross-sectional view of a shaping mold orifice;
FIG. 7 is a schematic view showing a molding sequence of main parts;
fig. 8 is a schematic flow chart of a cold roll forming process of a special-shaped rod with an installation groove according to embodiment 3.
In the figure:
1-a substrate;
2-base groove, 2 a-mounting wall, 2 b-connecting wall, 2 c-first folded corner, 2 d-second folded corner;
3-installation groove, 3 a-inner revolving part, 3 b-outer revolving part;
4-installation groove unit, 4 a-turning bending part, 4 b-cross rotation angle.
Detailed Description
The following specific examples are given by way of illustration only and not by way of limitation, and it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made in the examples without inventive faculty, and yet still be protected by the scope of the claims.
It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.
The scheme is realized by the following technical means:
example 1: a cold roll forming process method of a special-shaped rod with an installation groove 3 comprises the following steps:
s1a, selecting a steel raw material base plate 1 with the length of L and the width of D for processing and forming a special-shaped rod with a mounting groove 3 and the height of L. When the number of the mounting grooves 3 included in the profiled bar to be finally molded is an integer N, the width of the substrate 1 to be processed included in each mounting groove unit 4 is D/N, so that the substrate 1 is marked as N processing sections with the width of D/N, one processing section is selected on the substrate 1, and the base groove 2 is positioned and molded by processing of the first press roller assembly at the center of the processing section.
S1, forming a base groove 2 protruding towards one side of the substrate 1 in the middle of a selected processing section on the substrate 1 through a first pressing roll assembly arranged in multiple passes by means of gradual extrusion and bending, wherein the base groove 2 comprises a connecting wall 2b parallel to the substrate 1 and mounting walls 2a respectively connecting two ends of the connecting wall 2b and the substrates 1 on two sides, a first folded angle part 2c is formed between the connecting wall 2b and the mounting walls 2a, and a second folded angle part 2d is formed between the mounting walls 2a and the substrate 1; specifically, the first folded angle portion 2c and the second folded angle portion 2d are both folded and processed into acute angles, so that the base grooves 2 formed in the substrate 1 are both formed into a shape with a large inside and a small outside.
And S2, carrying out extrusion bending treatment on the bending angles in the base groove 2 formed in the step S1 one by one through a second pressing roller assembly with a circular arc pressing roller, enabling the bending angles in the first bending angle part 2c and the second bending angle part 2d to form round corners, enabling the first bending angle part 2c and the second bending angle part 2d to respectively and correspondingly form an inner rotary part 3a and an outer rotary part 3b, and enabling the base groove 2 to be made into an installation groove 3 capable of being clamped by utilizing an inner side wall surface.
S3, forming the turned and folded portion 4 a: carrying out extrusion bending treatment on a main body of the substrate 1 connected with two ends of a connecting plate on the mounting groove 3 by using a third compression roller assembly arranged in multiple passes to gradually form a rotary intersection angle, wherein the size of the rotary intersection angle 4b is 180 degrees/N, and a turning bent part 4a is formed between the rotary intersection angle and an outer rotary angle; the turning and bending parts 4a and the cross rotation angle 4b on both sides of one installation groove 3, and the part of the base plate 1 connected to the cross rotation angle 4b and the installation groove 3 together form an installation groove unit 4 on the special-shaped rod.
And S4, repeating the steps S1-S3, forming all the mounting groove units 4 on the substrate 1, and simultaneously enabling the two side ends of the substrate 1 to approach to each other under the action of each cross rotation angle 4b until the two side ends are abutted or form a tiny gap.
And S5, fixedly connecting the end parts of the two sides of the base plate 1 into a whole in a welding mode, and forming the special-shaped rod with the mounting groove 3.
And S6, further finishing the shape of the molded special-shaped rod to obtain the special-shaped rod with more regular shape and higher strength.
Example 2: a cold roll forming process method of a special-shaped rod with an installation groove 3 is characterized in that: the cold roll forming process method comprises the following steps:
s1, forming a base groove 2 protruding towards one side of the substrate 1 in the middle of a selected processing section on the substrate 1 through a first pressing roll assembly arranged in multiple passes by means of gradual extrusion and bending, wherein the base groove 2 comprises a connecting wall 2b parallel to the substrate 1 and mounting walls 2a respectively connecting two ends of the connecting wall 2b and the substrates 1 on two sides, a first folded angle part 2c is formed between the connecting wall 2b and the mounting walls 2a, and a second folded angle part 2d is formed between the mounting walls 2a and the substrate 1; specifically, the first folded angle part 2c and the second folded angle part 2d are both folded and processed into acute angles, so that the base grooves 2 formed on the substrate 1 are both formed into a shape with a large inside and a small outside;
s2a, performing extrusion bending processing on a first bending part 2c and a second bending part 2d which are positioned on one side of a base groove 2 through a group of second compression roller assemblies comprising inner rollers and outer rollers which are arranged in a mutually staggered mode, wherein the rotation axes of the inner rollers and the outer rollers are mutually parallel and are not on the same straight line any more, the surfaces of the inner rollers and the outer rollers are both arc-shaped curved surfaces, during bending processing, the inner rollers are arranged on the first bending part 2c to press from inside to outside to form an inner rotating part 3a, the outer rollers are arranged on the second bending part 2d to press from inside to outside to form an outer rotating part 3b, and the acting force applied by the inner rollers to the first bending part 2c is opposite to the acting force applied by the outer rollers to the second bending part 2d and is mutually parallel and is not on the same straight line;
s2b, forming the base groove 2 into a mounting groove including an inner turn 3a and an outer turn 3b through a press bending process by the second press roller assembly at the other side of the base groove 2 at the step S2;
s3, repeating the steps S1-S2b, and forming a plurality of mounting grooves 3 on the substrate 1;
s4, performing extrusion bending processing on the two outer sides of the substrate 1 through a third compression roller assembly comprising symmetrical compression rollers to simultaneously bend the two outer sides of the substrate 1 towards one side of the mounting groove 3 to form symmetrical turning bent parts 4a on the two sides of the substrate 1;
s5, adjusting the distance between the two press rollers in the third press roller assembly to reduce the distance between the two press rollers, and bending the two parts of the substrate 1 positioned on the other side of the mounting groove 3 from the outside to the inside in the step S5 through the extrusion bending process to bend the two parts of the substrate 1 from the other side of the mounting groove 3 to form symmetrical turning bent parts 4a positioned on the two sides of the substrate 1;
s6, repeating the steps S4-S5, forming a plurality of groups of symmetrical crossed rotation angles 4b on two sides of the substrate 1 in pairwise symmetry until all the mounting groove units 4 are formed, bending and surrounding two sides of the substrate 1 main body in the same direction to form a primary forming rod with a hollow interior, and enabling two end parts located on the outermost side of the substrate 1 to abut against each other and be attached or form a gap;
s7, the two ends of the substrate 1 are integrally connected by welding.
Example 3: a cold roll forming process method of a special-shaped rod with an installation groove 3 is characterized in that: the cold roll forming process method comprises the following steps:
s1, processing the substrate 1 by a first pressing roller assembly to simultaneously form a plurality of base grooves 2 which protrude to one side and are distributed symmetrically left and right relative to the center line of the substrate 1, wherein the base grooves 2 comprise connecting walls 2b parallel to the substrate 1 and mounting walls 2a respectively connecting two ends of the connecting walls 2b and the substrates 1 at two sides, a first folded part 2c is formed between the connecting walls 2b and the mounting walls 2a, and a second folded part 2d is formed between the mounting walls 2a and the substrate 1; specifically, the first folded angle part 2c and the second folded angle part 2d are both folded and processed into acute angles, so that a plurality of base grooves 2 formed on the substrate 1 are all formed into a shape with a large inside and a small outside;
s2a, simultaneously performing extrusion and bending processing on the first and second inflection portions 2c and 2d located on the same side of the plurality of base grooves 2 formed in step S1 by a group of second press roll assemblies including a plurality of pairs of inner and outer rolls arranged alternately, wherein the surfaces of the inner and outer rolls include arc-shaped curved surfaces, so that the inflection corners included in the first inflection portions on the same side become rounded corners, the inner roll bonding processing first inflection portions 2c form inner turning portions 3a, and the outer roll bonding processing second inflection portions 2d form outer turning portions 3 b;
s2b, forming the base grooves 2 into a mounting groove 3 with inner rotary parts 3a and outer rotary parts 3b formed on two sides through a second pressing roll assembly on the other sides of the plurality of base grooves 2 in the step S2a through extrusion bending processing;
s3, adjusting the distance between the symmetrical press rollers in the first press roller assembly and the distance between the two symmetrical second press roller assemblies and repeating the steps S1-S2b, and gradually and symmetrically forming a plurality of mounting grooves 3 on the substrate 1 from the center to two sides until all the mounting grooves 3 on the substrate 1 are molded;
s4, performing extrusion bending processing on the two outer sides of the substrate 1 through a third compression roller assembly comprising symmetrical compression rollers to simultaneously bend the two outer sides of the substrate 1 towards one side of the mounting groove 3 to form symmetrical turning bent parts 4a on the two sides of the substrate 1;
s5, adjusting the distance between the two press rollers in the third press roller assembly to reduce the distance between the two press rollers, and bending the two parts of the substrate 1 positioned on the other side of the mounting groove 3 from the outside to the inside in the step S4 through the extrusion bending process to bend the two parts of the substrate 1 from the other side of the mounting groove 3 to form symmetrical turning bent parts 4a positioned on the two sides of the substrate 1;
s6, repeating the steps S4-S5, forming a plurality of groups of symmetrical crossed rotation angles 4b on two sides of the substrate 1 in pairwise symmetry until all the mounting groove units 4 are formed, bending and surrounding two sides of the substrate 1 main body in the same direction to form a primary forming rod with a hollow interior, and enabling two end parts located on the outermost side of the substrate 1 to abut against each other and be attached or form a gap;
s7, the two ends of the substrate 1 are integrally connected by welding.
Example 4: on the basis of the cold roll forming process method for the special-shaped rod with the mounting groove 3 in the embodiment 1, the base plate 1 is preferably made of Q235, Q355 or Q460, and has the advantages of low cost, high strength and good extension and bending performance. In the final forming stage of the special-shaped rod, the abutted positions or gaps formed at the two end parts of the steel plate are welded in a high-frequency welding mode, the welding seam heat affected zone is small, and the heating speed is high, so that the welding speed and the welding seam quality can be greatly improved, strip steel without pickling, shot blasting and trimming can be used as a blank, meanwhile, alloy steel, high alloy steel and non-ferrous metal pipes can be welded, the unit power consumption is greatly reduced, and meanwhile, one set of welding equipment can be used for producing metal special-shaped rods with various dimensions.
Further preferably, the shaping operation is carried out on the welded and formed special-shaped rod, and the special-shaped rod can be finally trimmed by utilizing equipment with a die hole matched with the cross section shape of the required special-shaped rod, so that the finally obtained special-shaped rod with the installation groove is more accurate in size and shape and the position relation between the installation grooves 3, and is convenient to carry out more accurate positioning and installation with other parts.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A cold roll forming method of a special-shaped rod with a mounting groove is characterized in that: the cold roll forming method of the special-shaped rod with the mounting groove comprises the following steps:
s1, forming a base groove: form the bellied basic groove to base plate one side through the processing of first compression roller subassembly on the base plate, the basic groove includes the connecting wall that parallels with the base plate and is connected respectively the mounting wall of connecting wall both ends and both sides base plate, be formed with first dog-ear between connecting wall and the mounting wall, be the acute angle between the wall of first dog-ear both sides, be formed with second dog-ear between mounting wall and the base plate, also be the acute angle between the wall of second dog-ear both sides, the width that forms an internal connection wall is greater than the basic groove of the interval between first dog-ear and the second dog-ear.
2. The cold roll forming method of a bar having a mounting groove according to claim 1, wherein: further comprising the steps of:
s2, forming a mounting groove: sequentially carrying out extrusion bending treatment on a first bending angle part or a second bending angle part on the base groove from inside to outside through a second pressing roll assembly with the surface containing a circular arc-shaped curved surface, so that the bending angle contained in the first bending angle part becomes a round angle, and an inner rotary part is formed; the bending angle included in the second bending angle part is also rounded to form an outer turning part, so that the base groove is made into an installation groove.
3. The cold roll forming method of a bar having a mounting groove according to claim 1, wherein: further comprising the steps of:
s2, forming a mounting groove: comprises the following steps:
(S2a) simultaneously performing an extrusion bending process on a first corner portion and a second corner portion connected to a mounting wall of a base groove by a second press roll assembly including inner and outer rolls alternately arranged with respect to the mounting wall, the inner and outer rolls having curved surfaces in the shape of circular arcs so that the first corner portion is rounded to form an inner turn portion; the bending angle included in the second bending angle part becomes a round angle to form an inner rotary part;
(S2 b) repeating the step S2a on the other side of the base groove, and forming the base groove into a mounting groove.
4. A cold roll forming method of a bar having a mounting groove according to claim 2 or 3, wherein: further comprising the steps of:
s3, forming a turning bent part: the substrate main body connected with two ends of the connecting plate on the mounting groove is extruded and bent by a third compression roller assembly to form a rotary intersection angle, and a steering bent part is formed between the rotary intersection angle and the outer rotary part; the turning bending part, the cross rotation angle, the part of the base plate connected to the cross rotation angle and the mounting groove on two sides of one mounting groove form a mounting groove unit on the special-shaped rod together.
5. The cold roll forming method of a bar having a mounting groove according to claim 4, wherein: further comprising the steps of:
and S4, repeating the steps S1-S3 on the substrate until the mounting groove units on the substrate are completely molded, and the two end parts of the substrate are close to each other to abut against and joint or form a gap.
6. The cold roll forming method of a bar having a mounting groove according to claim 5, wherein: and connecting the two end parts of the base plate into a whole in a welding mode at the position where the two end parts of the base plate are abutted and attached or the gap is formed, so as to form the special-shaped rod with the installation groove.
7. The cold roll forming method of a bar having a mounting groove according to claim 1, wherein: taking the number of the mounting grooves contained in the special-shaped rod which needs to be molded finally as an integer N, and the width of the substrate as D, wherein the width of the substrate to be processed contained in each mounting groove unit is D/N; step S1a is added before step S1, and step S1a is as follows:
s1a, dividing a processing section: dividing the substrate mark into N processing sections with the width of D/N, selecting one processing section on the substrate, and positioning and forming a base groove at the center of the processing section through the processing of a first compression roller assembly; the size of the cross rotation angle is 180 DEG/N.
8. The cold roll forming method of a bar having a mounting groove according to claim 1, wherein: the first compression roller assembly comprises a plurality of compression rollers, the distance between the compression rollers is variable, the substrate is symmetrically extruded and bent from the center to two sides, and a plurality of mounting grooves which are bilaterally symmetrical relative to the center line of the substrate are formed on the substrate simultaneously.
9. The cold roll forming method of a bar having a mounting groove according to claim 5, wherein: the third press roller assembly comprises a pair of bilaterally symmetrical press rollers, the distance between the two press rollers is variable, the third press roller assembly is used for extruding and bending the substrate from the outer side to the center of the substrate to form cross rotation angles connected with the mounting groove, and the mounting groove unit is formed at the same time.
10. The cold roll forming method of a bar having a mounting groove according to claim 6, wherein: and a step of shaping and deforming the special-shaped rod is added at the end of the cold roll forming method.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011520447.3A CN112642898B (en) | 2020-12-21 | 2020-12-21 | Cold roll forming method for special-shaped rod with mounting groove |
| PCT/CN2021/099591 WO2022134492A1 (en) | 2020-12-21 | 2021-06-11 | Cold roll forming method for special-shaped rod having mounting grooves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011520447.3A CN112642898B (en) | 2020-12-21 | 2020-12-21 | Cold roll forming method for special-shaped rod with mounting groove |
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| Publication Number | Publication Date |
|---|---|
| CN112642898A true CN112642898A (en) | 2021-04-13 |
| CN112642898B CN112642898B (en) | 2022-08-23 |
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| CN202011520447.3A Active CN112642898B (en) | 2020-12-21 | 2020-12-21 | Cold roll forming method for special-shaped rod with mounting groove |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022134493A1 (en) * | 2020-12-21 | 2022-06-30 | 浙江晶日科技股份有限公司 | Cold roll forming method for special-shaped rod having mounting grooves |
| WO2022134492A1 (en) * | 2020-12-21 | 2022-06-30 | 浙江晶日科技股份有限公司 | Cold roll forming method for special-shaped rod having mounting grooves |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114951380A (en) * | 2022-07-28 | 2022-08-30 | 江苏兴锻智能装备科技有限公司 | Square tube stand column block-proof processing machine tool for traffic highway engineering |
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| CN112642898B (en) | 2022-08-23 |
| WO2022134492A1 (en) | 2022-06-30 |
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