CN112642899B - 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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- CN112642899B CN112642899B CN202011520448.8A CN202011520448A CN112642899B CN 112642899 B CN112642899 B CN 112642899B CN 202011520448 A CN202011520448 A CN 202011520448A CN 112642899 B CN112642899 B CN 112642899B
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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
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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 which are sequentially arranged 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-roll formed product has smooth surface, good appearance and accurate size, the length can be flexibly adjusted according to the requirement and is completely supplied according to the fixed length or multiple length, and 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: processing the substrate through a first pressing roller assembly to form a base groove protruding towards one side of the substrate, wherein the base groove comprises a connecting wall parallel to the substrate and mounting walls respectively connecting two ends of the connecting wall and the substrates on two sides, a first folded corner part is formed between the connecting wall and the mounting walls, and a second folded corner part is formed between the mounting walls and the substrates;
s2, forming a mounting groove: carry out the extrusion through second compression roller assembly to the first dog-ear portion and the second dog-ear portion that link to each other with same installation wall on the base groove and buckle the processing, second compression roller assembly includes relatively installation wall crisscross the interior roller and the outer roller that set up each other, during the processing of buckling, make interior roller is established and is exerted pressure at first dog-ear portion from inside to outside and forms interior turning portion, outer roller is established and is exerted pressure at second dog-ear portion from inside to outside and forms outer turning portion to make the mounting groove with the base groove.
As a preferable aspect of the present invention, the method for cold roll forming a profiled bar with an installation groove further includes 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 angle; 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.
As a preferable aspect of the present invention, the method for cold roll forming a profiled bar with an installation groove further includes the steps of: and S4, repeating the steps S1-S3 on the substrate until the mounting groove units on the substrate are all molded, and the two end parts of the substrate are close to each other to abut against and joint or form a gap.
In the present invention, it is preferable that the both end portions of the base plate are integrally connected by welding at the portions where the both end portions abut against each other or a gap is formed, thereby forming the bar having the mounting groove.
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 second roll assembly in step S2 includes two pairs of inner and outer rolls that are symmetrical to each other, and the first and second inflection points on the base groove side are first subjected to a press bending process by a pair of inner and outer rolls on the second roll assembly side to form an inner turn portion and an outer turn portion on the base groove side; and then the first folded angle part and the second folded angle part which are positioned on the other side of the base groove are extruded and bent by the other pair of inner and outer rollers positioned on the other side of the second pressing roller assembly, and an inner rotary part and an outer rotary part are formed on the other side of the base groove.
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 third roller assembly comprises a pair of rollers which are symmetrical left and right, the distance between the two rollers is variable, and the third roller assembly presses and bends the substrate from the outer side to the center of the substrate to form the crossed rotation angles connected with the mounting groove and form the mounting groove unit.
Preferably, the first press roller assembly, the second press roller assembly and the third press roller assembly are all arranged in a multi-pass mode, and the installation groove unit is formed by gradually performing extrusion bending treatment.
As a preferable mode of the present invention, a step of shaping and deforming the shaped bar 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 a 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.
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 roll forming process method, the base groove is directly bent and processed by taking a convex roller with a circular arc-shaped cross section as a second compression roller assembly, and meanwhile, compression rollers in the second compression roller assembly are staggered relative to two bending angles on one side of the base groove, so that the bending angles of the base groove are circular arc-shaped in the one-step forming process, the processing steps are reduced, the cost is saved, meanwhile, the stress generated in the steel plate is effectively reduced in the bending process, and the shape of the special-shaped rod piece formed by bending is more accurate.
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", "middle", etc. used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms may be changed or adjusted without substantial technical change.
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 and second folded portions 2c and 2d are each folded at 90 °.
S2, the first folded part 2c and the second folded part 2d connected to the same mounting wall 2a of the base groove 2 are folded by the second press roller assembly. The second press roll component comprises an inner roll and an outer roll which are arranged oppositely to the installation wall 2a in a mutually staggered mode, the rotation axes of the inner roll and the outer roll are mutually parallel and are not on the same straight line any more, during bending processing, the inner roll is arranged at the first inflection part 2c and is pressed from inside to outside to form an inner rotation part 3a, the outer roll is arranged at the second inflection part 2d and is pressed from inside to outside to form an outer rotation part 3b, and the acting force applied to the first inflection part 2c by the inner roll is opposite to the acting force applied to the second inflection part 2d by the outer roll in direction and is mutually parallel and is not on the same straight line any more. Thereby all handle basic groove 2 through second compression roller assembly to the both sides of basic groove 2 and make mounting groove 3 with basic groove 2, wherein the contained angle between interior gyration portion 3a and the outer gyration portion 3b both sides wall face is the acute angle, makes mounting groove 3 is the shape that the width diminishes from inside to outside interval gradually. The surfaces of the inner roller and the outer roller in the second compression roller assembly are arc-shaped, so that bending angles in the formed inner rotary part 3a and the outer rotary part 3b are all round angles, the stress inside the substrate 1 is effectively reduced, and the substrate 1 is prevented from being broken at the bending part in the forming process.
S3, forming a turning bend 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 two sides of one installation groove 3, and the part of the base plate 1 connected with the cross rotation angle 4b and the installation groove 3 form an installation groove unit 4 on the special-shaped rod together.
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 trimming 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, processing the substrate 1 through a first pressing roller assembly to form a base groove 2 protruding towards one side, wherein the base groove 2 comprises two parts, namely a connecting wall 2b parallel to the substrate 1 and a mounting wall 2a protruding towards one side relative to the substrate 1 and symmetrical left and right, a first folded corner part 2c is formed between the connecting wall 2b and the mounting wall 2a, a second folded corner part 2d is formed between the mounting wall 2a and the substrate 1, and the included angle between two sides of the first folded corner part 2c and the second folded corner part 2d is not less than 90 degrees;
s2, performing extrusion bending treatment on a first turned angle part 2c and a second turned angle part 2d which are positioned on one side of a base groove 2 through a group of second pressure roller assemblies comprising an inner roller and an outer roller which are arranged in a mutually staggered manner, so that the first turned angle part 2c is subjected to the inner roller bonding treatment to form an inner rotary part 3a, the second turned angle part 2d is subjected to the outer roller bonding treatment to form an outer rotary part 3b, and the included angles between two sides of the inner rotary part 3a and the outer rotary part 3b are both smaller than 90 degrees;
s3, performing extrusion bending treatment on the first corner part 2c and the second corner part 2d which are positioned on the other side of the base groove 2 through another group of second press roller assemblies which are arranged in mirror symmetry with the second press roller assemblies, so that an inner rotary part 3a and an outer rotary part 3b which are symmetrical to the base groove 2 are formed on the opposite side of the base groove 2, the distance between the outer rotary parts 3b positioned on the two sides is smaller than the length of the connecting wall 2b, and an installation groove 3 with the distance between the two side wall surfaces gradually reduced from inside to outside is formed;
s4, repeating the steps S1-S3, and forming a plurality of mounting grooves 3 on the substrate 1;
s5, performing extrusion bending treatment on the two outer sides of the substrate 1 through a third compression roller assembly comprising symmetrical compression rollers to bend the two outer sides of the substrate 1 towards one side of the mounting groove 3 to form symmetrical turning bending parts 4a on the two sides of the substrate 1;
s6, 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;
s7, repeating the steps S5-S6, 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;
s8, 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 through a first pressing roller assembly to simultaneously form a plurality of base grooves 2 which are convex towards one side and are distributed in bilateral symmetry relative to the central line of the substrate 1, wherein each base groove 2 comprises two parts, namely a connecting wall 2b parallel to the substrate 1 and a mounting wall 2a which is convex towards one side relative to the substrate 1 and is symmetric towards the left and right, a first folded corner part 2c is formed between the connecting wall 2b and the mounting wall 2a, a second folded corner part 2d is formed between the mounting wall 2a and the substrate 1, and the included angle between two sides of the first folded corner part 2c and the second folded corner part 2d is not less than 90 degrees;
s2, simultaneously carrying out extrusion bending treatment on a first bending part 2c and a second bending part 2d which are positioned on the same side of the plurality of base grooves 2 through a group of second pressing roll assemblies which comprise a plurality of pairs of inner rolls and outer rolls which are arranged in a staggered mode, so that the first bending part 2c is subjected to the inner roll attaching treatment to form an inner rotary part 3a, the second bending part 2d is subjected to the outer roll attaching treatment to form an outer rotary part 3b, and included angles between two sides of the inner rotary part 3a and the outer rotary part 3b are smaller than 90 degrees;
s3, simultaneously performing extrusion bending processing on the first and second inflection portions 2c and 2d on the other sides of the plurality of base grooves 2 in the step S2 by using another set of second press roll assemblies which are mirror-symmetrical to the second press roll assemblies, so that the plurality of base grooves 2 are symmetrically formed at the opposite sides as inner and outer turning portions 3a and 3b, the distance between the outer turning portions 3b positioned at both sides is smaller than the length of the connecting wall 2b, and a plurality of mounting grooves 3 are formed on the substrate 1, wherein the distance between the two side wall surfaces of each mounting groove gradually decreases from inside to outside;
s4, adjusting the distance between the symmetrical compression rollers in the first compression roller assembly and the distance between the two symmetrical groups of second compression roller assemblies, repeating the steps S1-S3, 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;
s5, 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;
s6, 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;
s7, repeating the steps S5-S6, 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;
s8, 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 (7)
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:
before forming the mounting groove (3) for positioning the mounting part and the mounting part in S2, performing S1 to form a base groove (2): processing the substrate through a first pressing roller assembly to form a base groove protruding towards one side of the substrate, wherein the base groove comprises a connecting wall parallel to the substrate and mounting walls respectively connecting two ends of the connecting wall and the substrates on two sides, a first folded corner part is formed between the connecting wall and the mounting walls, and a second folded corner part is formed between the mounting walls and the substrates; the included angle between two sides of the first folded angle part (2c) and the second folded angle part (2d) is not less than 90 degrees;
s2, forming a mounting groove (3) for positioning and mounting parts on the basis of the base groove (2) of S1: the first flanging part and the second flanging part which are connected with the same mounting wall on the base groove are extruded and bent through a second compression roller assembly, the second compression roller assembly comprises an inner roller and an outer roller which are staggered relative to the mounting wall, the inner roller is arranged on the first flanging part and is pressed from inside to outside to form an inner rotary part during bending, the outer roller is arranged on the second flanging part and is pressed from inside to outside to form an outer rotary part, and therefore the base groove (2) is manufactured into a mounting groove (3); wherein the included angle between the two side wall surfaces of the inner rotary part (3a) and the outer rotary part (3b) is an acute angle; the surfaces of the inner roller and the outer roller in the second press roller assembly are arc-shaped, so that bending angles in the formed inner rotary part (3a) and the outer rotary part (3b) are all round angles;
s3, forming a turning bent part (4 a): the substrate main body connected with two ends of the upper connecting plate of the mounting groove is extruded and bent by a third compression roller assembly to form a rotary intersection angle, and a turning bent part (4a) is formed between the rotary intersection angle and the outer rotary part; the steering bending part (4a) and the cross rotation angle (4b) which are positioned at two sides of one mounting groove, and a part of the base plate (1) connected to the cross rotation angle (4b) and the mounting groove form a mounting groove unit (4) on the special-shaped rod together; the base plate between the respective crossed rotation angles (4b) of the two adjacent mounting groove units (4) is a basic flat plate and is not bent;
s4, repeating the steps S1-S3 on the substrate until the mounting groove units (4) on the substrate are completely molded, wherein two ends of a part of the substrate (1) connected by the crossed rotation angles (4b) of two adjacent mounting groove units (4) which are folded in advance are close to each other and abutted to each other or form a gap;
and S5, connecting the two ends of the partial base plate (1) connected with the respective crossed rotation angles (4b) of the two adjacent mounting groove units (4) which are folded in advance into a whole at the position where the two ends are abutted and attached or a gap is formed by welding, and forming the special-shaped rod with the mounting groove.
2. 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 pressing roller assembly; the size of the cross rotation angle is 180 DEG/N.
3. The cold roll forming method of a bar having a mounting groove according to claim 1, wherein: the second press roll assembly in the step S2 includes two pairs of inner and outer press rolls that are symmetrical to each other, and the first and second inflection portions located on one side of the base groove are first subjected to an extrusion bending process by a pair of inner and outer rolls located on one side of the second press roll assembly, so that an inner rotary portion and an outer rotary portion are formed on one side of the base groove; and then the first folded angle part and the second folded angle part which are positioned on the other side of the base groove are extruded and bent by the other pair of inner and outer rollers positioned on the other side of the second pressing roller assembly, and an inner rotary part and an outer rotary part are formed on the other side of the base groove.
4. 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 every two compression rollers is variable, the substrate is symmetrically extruded and bent from the center to two sides, and a plurality of base grooves which are bilaterally symmetrical relative to the center line of the substrate are formed on the substrate at the same time.
5. The cold roll forming method of a bar having a mounting groove according to claim 3, wherein: the third press roller assembly comprises a pair of left and right 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.
6. The cold roll forming method of a bar having a mounting groove according to claim 1, wherein: the first compression roller assembly, the second compression roller assembly and the third compression roller assembly are all arranged in multiple passes, and the installation groove unit is formed by gradually performing extrusion bending treatment.
7. The cold roll forming method of a profiled bar with mounting grooves according to claim 1, 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 |
|---|---|---|---|
| CN202011520448.8A CN112642899B (en) | 2020-12-21 | 2020-12-21 | Cold roll forming method for special-shaped rod with mounting groove |
| PCT/CN2021/099592 WO2022134493A1 (en) | 2020-12-21 | 2021-06-11 | Cold roll forming method for special-shaped rod having mounting grooves |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011520448.8A CN112642899B (en) | 2020-12-21 | 2020-12-21 | Cold roll forming method for special-shaped rod with mounting groove |
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| CN112642899B true CN112642899B (en) | 2022-08-26 |
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| CN112642899B (en) * | 2020-12-21 | 2022-08-26 | 浙江晶日科技股份有限公司 | Cold roll forming method for special-shaped rod with mounting groove |
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| CN112642898B (en) * | 2020-12-21 | 2022-08-23 | 浙江晶日科技股份有限公司 | Cold roll forming method for special-shaped rod with mounting groove |
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| CN112642899A (en) | 2021-04-13 |
| WO2022134493A1 (en) | 2022-06-30 |
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