CN115703134A - Multi-cavity plate cold-bending forming device and method thereof - Google Patents
Multi-cavity plate cold-bending forming device and method thereof Download PDFInfo
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- CN115703134A CN115703134A CN202110891728.8A CN202110891728A CN115703134A CN 115703134 A CN115703134 A CN 115703134A CN 202110891728 A CN202110891728 A CN 202110891728A CN 115703134 A CN115703134 A CN 115703134A
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Abstract
The invention discloses a multi-cavity plate cold-roll forming device, which comprises a multi-roll forming mechanism with a plurality of passes, wherein each multi-roll forming mechanism comprises a rack, an upper multi-roll forming die and a lower multi-roll forming die, the upper multi-roll forming die and the lower multi-roll forming die are arranged on the rack, the upper multi-roll forming die is provided with a plurality of continuous upper forming rolls, the lower multi-roll forming die is provided with a plurality of continuous and connected lower forming rolls, a split structure is arranged among the upper forming rolls of the upper multi-roll forming die, each upper forming roll is designed into a split structure with a left part and a right part, and a driving and adjusting mechanism for controlling the left and right split parts of each upper forming roll to move transversely and longitudinally is arranged on the rack. The invention also discloses a multi-cavity plate cold-bending forming method. Through the split design of the upper multi-roll forming die and the functions of transverse displacement and longitudinal displacement, the problems of cold roll forming and different compensation of different material thicknesses and even different widths can be solved.
Description
Technical Field
The invention relates to a cold roll forming technology of a metal plate, in particular to a multi-cavity plate cold roll forming device and a method thereof.
Background
Cold roll forming, also known as roll forming, is a metal forming process that is energy-saving, energy-saving and efficient. As shown in fig. 1, in cold roll forming, a metal strip 2 is continuously and transversely bent by a plurality of forming rolls 1 arranged in sequence to manufacture a section bar or a part with a specific cross section, wherein a three-dimensional shape of the part 3 formed by cold roll forming of each pass is arranged above the forming rolls in fig. 1, and a front view of the forming rolls 1 corresponding to the pass is arranged below the forming rolls.
For corrugated board, etc. having a plurality of simple features (e.g., a plurality of U-shapes, C-shapes, L-shapes, etc.) in cross-sections in the automobile and building industries, a multi-roll forming die having a plurality of continuous forming rolls as shown in fig. 2, including an upper multi-roll forming die 4 and a lower multi-roll forming die 5, is required for each pass. In actual production, one part corresponds to one set of multi-roller forming die, and when parts with different sizes are replaced, the corresponding die needs to be replaced on the original rack, even materials are changed on the same part, and the corresponding die needs to be replaced in order to ensure the precision and the quality of the parts.
Because the thickness and the strength of the die and the material are directly related, the same part may be switched to other materials according to production requirements, but because the thickness and the strength of the material are changed, the die designed according to the original material can cause the generation of defects such as part precision problem and edge wave, and the like, and the die needs to be opened again to avoid the defects, so that the production cost is greatly increased. For example, due to the requirement of light weight, different materials are often replaced for the same part, for example, a high-strength steel material with higher strength is used to replace a material with low strength, and under the condition that the bearing capacity is not changed, the thickness of the material is reduced, which affects the gap of the forming roller. Although the die gap can be finely adjusted manually, the die gap is limited by the width of the die, and the adjustment is limited to one direction, as shown in fig. 3, the thickness of the material is T, when the thickness of the material is reduced, the upper forming roller moves downwards by a distance of Δ T1, the distance between the side walls of the die is changed into Δ T2, and since the cross sections of the parts are not on the same plane, Δ T1 is not equal to Δ T2, the die gap between the bottom and the side wall cannot be met at the same time, and as a result, the accuracy of the formed parts cannot be guaranteed, and the defects of edge waves, bag waves and the like are easy to occur, so that the die needs to be replaced to ensure the accuracy of the parts, which greatly increases the cost of the die.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a multi-cavity plate cold-bending forming device and a method thereof, when the thickness strength of a material is changed, a model does not need to be replaced, and the production requirement can be met by adjusting the longitudinal distance and the transverse distance between rollers.
On one hand, the cold roll forming device for the multi-cavity plate comprises a multi-roll forming mechanism with a plurality of passes, each multi-roll forming mechanism comprises a rack, an upper multi-roll forming die and a lower multi-roll forming die, the upper multi-roll forming die and the lower multi-roll forming die are arranged on the rack, the upper multi-roll forming die is provided with a plurality of continuous upper forming rolls, the lower multi-roll forming die is provided with a plurality of continuous and connected lower forming rolls, and the cold roll forming device is characterized in that: the upper multi-roller forming die is characterized in that a plurality of upper forming rollers of the upper multi-roller forming die are of split structures, each upper forming roller is designed into a left split structure and a right split structure, and a driving and adjusting mechanism for controlling the left split part and the right split part of each upper forming roller to move transversely and longitudinally is arranged on the rack.
The driving adjusting mechanism comprises an edge upper forming roller split part adjusting mechanism which is arranged on the racks on the two sides respectively and comprises an adjusting shaft transversely connected with the upper forming roller split part on the outermost side, a transverse adjusting motor connected with the adjusting shaft and used for adjusting the transverse movement of the upper forming roller split part on the outermost side, and a longitudinal adjusting motor connected with the transverse adjusting motor and used for adjusting the longitudinal movement of the upper forming roller split part on the outermost side.
The driving adjusting mechanism comprises a middle upper forming roller split part adjusting mechanism which is arranged above the upper multi-roller forming die and comprises a connecting rod longitudinally connected with the other corresponding upper forming roller split parts except the outermost side, a bidirectional adjusting motor connected with the connecting rod and a transverse rail for the bidirectional adjusting motor to transversely move, and the connecting rod is connected with the outer side of the corresponding upper forming roller split part.
And a cross beam is arranged between the machine frames, and the transverse tracks of the bidirectional adjusting motors are arranged on the cross beam and are connected into a whole.
The lower multi-roll forming die is designed into a plurality of corresponding sets according to different widths of part cavities, and the lower multi-roll forming die is mounted on the rack through a detachable structure.
On the other hand, the cold-roll forming method of the multi-cavity plate cold-roll forming device comprises the following steps: A. adjusting each-pass multi-roller forming mechanism: if the thickness requirement of the part changes, the upper forming rollers are driven to move longitudinally through the longitudinal adjusting motor and the bidirectional adjusting motor together so as to adjust the longitudinal distance between each upper forming roller and the corresponding lower forming roller to meet the thickness requirement of the bottom of the part; the left and right split parts of each upper forming roller are respectively driven by a transverse adjusting motor and a bidirectional adjusting motor to move transversely so as to adjust the transverse distance between each upper forming roller and the corresponding lower forming roller to meet the thickness requirement of the side wall of the part; B. after the adjustment, the incoming materials are subjected to cold roll forming in sequence by each-pass multi-roll forming mechanism.
In step a: the distance Δ T of the longitudinal movement is: Δ T = T1-T2, T2 being the thickness of the part to be formed, T1 being the thickness of the preceding part; the distance 2 delta W between the left split part and the right split part of the upper forming roller after the transverse movement is as follows: 2
And thetan is the roll-forming angle of a certain pass of forming roll.
In step a: if the width of the cavity of the part is changed, the lower multi-roller forming die with the corresponding width dimension is replaced, and the left and right split parts of each upper forming roller are respectively driven by the transverse adjusting motor and the bidirectional adjusting motor to transversely move so as to adjust the transverse distance between each upper forming roller and the corresponding lower forming roller to be matched with the width change of the cavity of the formed part. The multi-cavity plate cold-bending forming device and the method thereof have the following beneficial effects that:
1. the multi-roller forming die does not need to be replaced, when the thickness (strength) of the multi-cavity part material to be formed is changed, only the upper forming roller needs to be correspondingly adjusted longitudinally and transversely, the thickness requirements of the bottom and the side wall of the cavity of the part can be met, the cost of the die is reduced, and the production efficiency is improved;
2. when the width of a part cavity to be formed is changed, only the corresponding lower multi-roller forming die is needed to be replaced, and the requirement on the width of the part can be met by adjusting the distance between the split left part and the split right part of the upper forming roller.
3. The flexible production of the invention greatly reduces the number of the moulds and avoids the time cost and the management cost of the moulds caused by frequent mould changing.
Drawings
FIG. 1 is a schematic diagram of a conventional multi-pass cold roll forming;
FIG. 2 is a schematic view of a conventional one-pass multi-roll forming die;
FIG. 3 is a schematic view of a part having a thickness that varies such that a conventional forming roll is not suitable for use;
FIG. 4 is a plan view of the cold roll forming apparatus of the present invention (four passes are taken as an example);
FIG. 5 is a block diagram of a multi-roll forming mechanism for a certain pass of the present invention;
FIG. 6 is a schematic view showing the change of the width of a cross-section cavity for forming new and old parts according to the present invention;
FIG. 7 is a comparative illustration of the embossing of the new and old parts of the present invention.
Detailed Description
The multi-cavity plate cold-roll forming device and the method thereof according to the present invention will be further described with reference to the accompanying drawings and embodiments.
As shown in fig. 4, the multi-cavity cold roll forming apparatus of the present invention includes a multi-roll forming mechanism 10 having a plurality of passes, as in the prior art, wherein each of the multi-roll forming mechanisms 10 includes a frame 11, and an upper multi-roll forming die 12 and a lower multi-roll forming die 13 which are provided on the frame 11, the upper multi-roll forming die 12 has a plurality of continuous upper forming rolls 121, the lower multi-roll forming die 13 has a plurality of continuous and integrally connected lower forming rolls 131, and is mounted on the frame 11 through drive shafts 132 at both ends, the upper and lower roll shapes are the same as in the prior art, and are determined by the shapes of parts (such as C-shape, U-shape, L-shape (half of U-shape), and different from the prior art, as shown in fig. 5, the upper forming rolls 121 of the upper multi-roll forming die 12 are of a split structure, each of the upper forming roll 121 is designed as a split structure in which each of a left and right part is separated, and a driving and an adjusting mechanism for controlling each of the left and right parts of the split parts are provided on the frame 11 to move laterally and longitudinally. In fig. 4 3' is the cross-sectional shape (U-shapes) of the formed part 3.
As an embodiment, the drive adjusting mechanism specifically includes an upper edge forming roller split portion adjusting mechanism and an upper middle forming roller split portion adjusting mechanism. The two regulating mechanisms of the divided parts of the upper edge forming rollers are provided separately on the frames 11 on both sides and each include a regulating shaft 122 connected transversely to the divided part of the outermost upper forming roller 121, a transverse regulating motor 123 connected to the regulating shaft 122 for regulating the transverse movement of the divided part of the outermost upper forming roller 121, and a longitudinal regulating motor 124 connected to the transverse regulating motor 123 via a longitudinal rail 125 for regulating the longitudinal movement of the divided part of the outermost upper forming roller 121. The adjusting shaft is driven by the transverse adjusting motor 123 to drive the split part of the upper forming roller 121 at the leftmost side or the rightmost side to move transversely, and the longitudinal adjusting motor 124 can adjust the longitudinal movement of the split part of the upper forming roller 121 at the leftmost side or the rightmost side. The adjusting mechanism of the split part of the upper middle forming roller 121 has a plurality of adjusting mechanisms, the number of the adjusting mechanisms corresponds to that of the split parts of the other upper forming rollers 121, the adjusting mechanisms comprise connecting rods 126 longitudinally connected with the split parts of the other upper forming rollers 121, bidirectional adjusting motors 127 connected with the connecting rods 126, and transverse rails 128 for transverse movement of the bidirectional adjusting motors 127, the connecting rods 126 are connected with adjusting shafts 122 arranged on the outer sides of the split parts of the corresponding upper forming rollers 121, and transverse and longitudinal movement of the split parts of the other upper forming rollers 121 can be realized through the bidirectional adjusting motors 127. Of course, the horizontal and vertical movements of the left and right split parts of the upper forming roll 121 can be synchronized and unified by controlling the corresponding adjusting motors, or can be independently controlled according to the requirements.
As an embodiment, a cross beam 111 is provided between the racks 11 of each pass, and the transverse rails 128 of the bidirectional adjusting motors 127 can be arranged on the cross beam and connected into a whole.
By adopting the cold-bending forming device, the cold-bending forming of parts with different thickness changes can be realized without replacing the upper multi-roll forming die 13 and the lower multi-roll forming die 13. If the part cold-bending forming with different cavity width changes needs to be realized, the corresponding lower multi-roller forming die 13 needs to be replaced. Therefore, as an embodiment, the lower multi-roll forming die 13 is designed into a plurality of corresponding sets according to different widths of the part cavities, and the frame 11 is detachably installed on the lower multi-roll forming die 13, so that the replacement is convenient.
Since the roll forming has a plurality of passes, the present invention is consistent except for the forming angles of the multi-roll forming die in the plurality of passes, and therefore, fig. 4 is a schematic diagram of the four-pass forming of the present invention, but does not represent that the present invention only has or only has four-pass forming. In order to illustrate the technical scheme of the invention, the adjustment principle in the cold roll forming method of the invention is illustrated by taking a certain pass as an example:
in the embodiment 1, the strength of the material used by the original part is increased due to the requirement of light weight of a certain multi-U-shaped part, the thickness of the corresponding material is reduced from 3mm to 1.5mm, and the specific parameters are shown in the following table 1:
TABLE 1
| Type of cross section | Width of ridge | Material | Thickness of | Roller embossing process | |
| Original parts | U-shaped | 100mm | Q235B | 3mm | 0-15-30-45-60-75-90 |
| New parts | U-shaped | 100mm | DP600 | 1.5mm | 0-15-30-45-60-75-90 |
Because the thickness changes by 1.5mm, the gap between the part forming rollers must change, and according to the traditional rolling forming method, the gap requirement of the bottom of the part is met, but the gap of the side wall in the forming process cannot be met.
The invention only needs to change the forming parameters on the equipment, and the adjusting parameters are different because the forming roller angle of each pass is different, and the adjustment is based on the following principle:
1) Keeping the position of the lower forming roller 131 constant with the lower forming roller 131 as a reference;
2) Firstly, ensuring the longitudinal clearance between the upper multi-roll forming die 12 and the lower multi-roll forming die 13, and simultaneously driving the split parts of all the upper forming rolls 121 to move downwards by 1.5mm through a longitudinal adjusting motor 124 and a bidirectional adjusting motor 127;
3) Each pair of split parts of the upper forming roll 121 is driven by a transverse adjusting motor 123 and a bidirectional adjusting motor 127 to respectively and transversely move towards the left and right side walls of the lower forming roll 131 by a distance Δ W, so that the distance between the left and right split parts of the upper forming roll 121 reaches 2 Δ W, and the Δ W is related to the pattern angle θ n of the forming roll in each pass, namely
TABLE 2
Note: the longitudinal displacement parameter is "+", the sheet is close, otherwise, the sheet is far away.
After process adjustment, the bottom surface and the side surface of the part can meet the process requirement of the die gap, and the formed additional precision is higher.
Example 2, the ridge width (span) of a multi-U-shaped part is changed from 100mm to 150mm, as shown in FIG. 6, and the part process parameters are shown in Table 3:
TABLE 3
| Type of cross section | Width of ridge | Material | Thickness of | Roller embossing process | |
| Original parts | W type | 100mm | DC03 | 2mm | 0-15-30-45-60-75-90 |
| New parts | W type | 150mm | DC03 | 2mm | 0-15-30-45-60-75-90 |
The embossing (single set) of the part can be seen in fig. 7.
Because the span of the new part is increased by delta B =50mm on the basis of the width of the original part, according to the traditional rolling forming method, a set of new dies must be used, but the invention only needs to replace the corresponding lower die, and the upper multi-roller forming die 12 can move horizontally and longitudinally and can be correspondingly adjusted according to the shape of the new part:
1) Keeping the position of the lower forming roller 131 constant with the lower forming roller 131 as a reference;
2) Each pair of split parts of the upper forming roller 121 is driven by the horizontal adjusting motor 123 and the bidirectional adjusting motor 127 to move 1/2 × Δ B =25mm horizontally toward the left and right side walls of the lower forming roller 131, respectively, so that the distance between the left and right split parts of the upper forming roller 121 reaches Δ B, and the longitudinal position is kept constant.
Through the adjustment, the forming roller die suitable for the original 100mm width can be changed into a new forming die for 150mm width and thickness materials only by replacing a multi-roller forming die, and the forming quality is good through verification.
In summary, the multi-cavity plate cold-bending forming device and the method thereof according to the present invention are suitable for cold-bending forming of parts having a plurality of simple characteristic cross sections, such as corrugated plates, and other metal materials having various strengths of 600Mpa or less in yield strength.
However, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present invention, and that changes and modifications to the above described embodiments are intended to fall within the scope of the appended claims, provided they fall within the true spirit of the present invention.
Claims (8)
1. The utility model provides a multi-chamber panel forming device that colds bends, includes the multi-roll forming mechanism of several passes, and each pass multi-roll forming mechanism all includes the frame and locates last multi-roll forming die, the multi-roll forming die down on the frame, and last multi-roll forming die has a plurality of continuous last forming rollers, and the multi-roll forming die down has a plurality of continuous and continuous lower forming rollers, its characterized in that: the upper multi-roller forming die is characterized in that a plurality of upper forming rollers of the upper multi-roller forming die are of split structures, each upper forming roller is designed into a left split structure and a right split structure, and a driving and adjusting mechanism for controlling the left split part and the right split part of each upper forming roller to move transversely and longitudinally is arranged on the rack.
2. A multi-cavity plate cold roll forming apparatus as claimed in claim 1, wherein: the driving adjusting mechanism comprises an edge upper forming roller split part adjusting mechanism which is arranged on the racks on the two sides respectively and comprises an adjusting shaft transversely connected with the upper forming roller split part on the outermost side, a transverse adjusting motor connected with the adjusting shaft and used for adjusting the transverse movement of the upper forming roller split part on the outermost side, and a longitudinal adjusting motor connected with the transverse adjusting motor and used for adjusting the longitudinal movement of the upper forming roller split part on the outermost side.
3. A multi-cavity plate cold roll forming apparatus as claimed in claim 2, wherein: the driving adjusting mechanism comprises a middle upper forming roller split part adjusting mechanism which is arranged above the upper multi-roller forming die and comprises a connecting rod longitudinally connected with the other corresponding upper forming roller split parts except the outermost side, a bidirectional adjusting motor connected with the connecting rod and a transverse rail for the bidirectional adjusting motor to transversely move, and the connecting rod is connected with the outer side of the corresponding upper forming roller split part.
4. A multi-cavity plate cold roll forming apparatus as claimed in claim 3, wherein: and a cross beam is arranged between the machine frames, and the transverse tracks of the bidirectional adjusting motors are arranged on the cross beam and are connected into a whole.
5. A multi-cavity plate cold roll forming apparatus as claimed in claim 1, wherein: the lower multi-roll forming die is designed into a plurality of corresponding sets according to different widths of part cavities, and the lower multi-roll forming die is mounted on the rack through a detachable structure.
6. A cold roll forming method of a multi-cavity plate cold roll forming apparatus as claimed in claim 1, comprising the steps of:
A. adjusting each-pass multi-roller forming mechanism: if the thickness requirement of the part is changed, the upper forming rollers are driven to move longitudinally by the longitudinal adjusting motor and the bidirectional adjusting motor together so as to adjust the longitudinal distance between each upper forming roller and the corresponding lower forming roller to meet the thickness requirement of the bottom of the part; the left and right split parts of each upper forming roller are respectively driven by a transverse adjusting motor and a bidirectional adjusting motor to move transversely so as to adjust the transverse distance between each upper forming roller and the corresponding lower forming roller to meet the thickness requirement of the side wall of a part;
B. after the adjustment, the incoming materials are subjected to cold roll forming in sequence by each-pass multi-roll forming mechanism.
7. A cold roll forming method of a multi-cavity plate cold roll forming apparatus as claimed in claim 6, wherein in step a: the distance Δ T of the longitudinal movement is: Δ T = T1-T2, T2 being the thickness of the part to be formed, T1 being the thickness of the preceding part; the distance 2 delta W between the left split part and the right split part of the upper forming roller after the transverse movement is as follows:
and thetan is the roll-forming angle of a certain pass of forming roll.
8. A cold roll forming method of a multi-cavity plate cold roll forming apparatus as claimed in claim 6, wherein in step a: if the width of the cavity of the part is changed, the lower multi-roller forming die with the corresponding width dimension is replaced, and the left and right split parts of each upper forming roller are respectively driven by the transverse adjusting motor and the bidirectional adjusting motor to transversely move so as to adjust the transverse distance between each upper forming roller and the corresponding lower forming roller to be matched with the width change of the cavity of the formed part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110891728.8A CN115703134A (en) | 2021-08-04 | 2021-08-04 | Multi-cavity plate cold-bending forming device and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110891728.8A CN115703134A (en) | 2021-08-04 | 2021-08-04 | Multi-cavity plate cold-bending forming device and method thereof |
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| Publication Number | Publication Date |
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| CN115703134A true CN115703134A (en) | 2023-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110891728.8A Pending CN115703134A (en) | 2021-08-04 | 2021-08-04 | Multi-cavity plate cold-bending forming device and method thereof |
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- 2021-08-04 CN CN202110891728.8A patent/CN115703134A/en active Pending
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