CN116550867A - Forming process of multi-convex hull structural member - Google Patents
Forming process of multi-convex hull structural member Download PDFInfo
- Publication number
- CN116550867A CN116550867A CN202310825919.3A CN202310825919A CN116550867A CN 116550867 A CN116550867 A CN 116550867A CN 202310825919 A CN202310825919 A CN 202310825919A CN 116550867 A CN116550867 A CN 116550867A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000003825 pressing Methods 0.000 claims abstract description 28
- 238000000465 moulding Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a molding process of a multi-convex hull structural member, and belongs to the technical field of molding processes. The molding process comprises the following steps: step 10, carrying out initial stamping on a material sheet to form a convex hull so as to obtain an initial structural member; the convex hull is positioned in the middle area of the initial structural member, and the periphery of the initial structural member is a flange surface; step 20, carrying out deep stamping on the initial structural member, and setting a pressing line on a flange surface of the initial structural member while carrying out deep stamping to obtain an initial structural member; and 30, performing accurate stamping forming on the primary-adjustment structural member to obtain a product structural member. The invention provides a molding process of a multi-convex hull structural member, which ensures the flatness of the peripheral flange surface of the structural member and ensures the stable quality of products.
Description
Technical Field
The invention belongs to the technical field of forming processes, and particularly relates to a forming process of a multi-convex hull structural member.
Background
The middle area of the multi-convex hull structural member is a plurality of stretching convex hulls, and the outer peripheral area is used as a flange surface for connecting with other components. At present, a multi-convex hull structural member is formed by stamping through a die, and in the process of stamping to form a plurality of convex hulls, the material flows due to stress, folds and warpage are generated in the peripheral area, the flatness of the flange surface at the outer side is poor, and the tightness of subsequent assembly gluing is affected. Because the flatness of the product is poor, frequent shutdown and die repair are needed, the productivity efficiency is low, and the manufacturing cost is increased.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the forming process of the multi-convex hull structural member is provided, the flatness of the flange surface around the structural member is ensured, and the product quality is stable.
In order to solve the technical problems, the invention provides a molding process of a multi-convex hull structural member, which comprises the following steps:
step 10, carrying out initial stamping on a material sheet to form a convex hull so as to obtain an initial structural member; the convex hull is positioned in the middle area of the initial structural member, and the periphery of the initial structural member is a flange surface;
step 20, carrying out deep stamping on the convex hull of the initial structural member, and setting a pressing line on the flange surface of the initial structural member while carrying out deep stamping to obtain an initial structural member;
and step 30, performing accurate stamping forming on the primary-adjustment structural member to obtain a product structural member.
As a further improvement of the embodiment of the invention, the pressing lines are distributed in a whole circle and surround the periphery of the middle area.
As a further improvement of the invention, the wire pressing is of a wire groove structure, and the depth of the wire pressing is not more than 30% of the thickness of the flange surface of the initial structural member and is not less than 0.1mm.
As a further improvement of the present invention, there is also included:
and step 40, adjusting the flatness of the product structural member to obtain a finished product structural member.
As a further improvement of the present invention, in step 40, adjusting the flatness of the product structure includes adjusting the flatness of the flange face of the product structure, and adjusting the flatness of the intermediate area of the product structure.
As a further improvement of the present invention, in the step 40, the product structural member is measured by using a three-dimensional measuring device, and the flatness of the product structural member is adjusted by using a leveling assembly according to the measurement result.
As a further improvement of the invention, the leveling component comprises an upper adjusting piece and a lower adjusting piece, wherein the upper adjusting piece comprises a base plate, an adjusting rod is arranged on the base plate, and the distance between the end face of the adjusting rod and the base plate is adjustable; the structure of the lower adjusting piece is the same as that of the upper adjusting piece.
As a further improvement of the present invention, in the step 40, the flatness of the product structural member is adjusted by using the leveling component according to the measurement result, which specifically includes:
fixing the base plate of the upper adjusting piece above the product structural piece, wherein the end faces of all the adjusting rods of the upper adjusting piece are abutted against the upper surface of the product structural piece; fixing the base plate of the lower adjusting piece below the product structural piece, wherein the end faces of all adjusting rods of the lower adjusting piece are abutted against the lower surface of the product structural piece; all the adjusting rods of the upper adjusting piece are respectively opposite to all the adjusting rods of the lower adjusting piece one by one;
according to the flatness view of the product structural member measured by the three-dimensional measuring device, if the local point position of the product structural member is higher than the periphery, the adjusting rod of the upper adjusting member positioned on the upper surface of the local point position is downwards adjusted to increase the distance between the end face of the adjusting rod and the substrate, and the adjusting rod of the lower adjusting member positioned on the lower surface of the local point position is downwards adjusted to shorten the distance between the end face of the adjusting rod and the substrate; the adjusting rod of the upper adjusting piece downwards presses the local point of the product structural member so that the local point is flush with the periphery;
if the local point position of the product structural member is lower than the periphery, an adjusting rod of an upper adjusting member positioned on the upper surface of the local point position is adjusted upwards to shorten the distance between the end face of the adjusting rod and the substrate, and an adjusting rod of a lower adjusting member positioned on the lower surface of the local point position is adjusted upwards to increase the distance between the end face of the adjusting rod and the substrate; the adjusting rod of the lower adjusting piece pushes up the local point position of the product structural piece, so that the local point position is flush with the periphery.
As a further improvement of the invention, the adjusting rod adopts a resin screw, the rod part of the resin screw is in threaded connection with a threaded hole on the substrate, and the head part of the resin screw is used for abutting against a product structural member; and/or the end face of the adjusting rod is provided with a resin layer.
As a further improvement of the invention, the distance between adjacent adjusting rods of the upper adjusting piece is 0.05-0.1 mm.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
according to the forming process of the multi-convex hull structural member, the plurality of convex hulls are formed by initial stamping, the initial stamping is shallow stamping, and the stress, the fold and the warping degree are small. And when the deep stamping is performed, the pressing line is arranged on the flange surface around the convex hull, so that the stress in the material during stamping and stretching is reduced, the folds and the warpage generated on the flange surface during stamping and stretching can be flattened, and the planeness of the flange surface of the initial structural member is ensured. Meanwhile, when the step 30 is performed with accurate stamping, the flow blocking groove on the flange surface is formed by the pressing line, so that the stress deformation generated by stretching the material during accurate stamping is reduced, the material flow in the middle area during stretching is reduced, the flange surface is prevented from being increased in folds and warpage due to re-stretching, the flatness of the flange surface is ensured, and the product quality is improved.
Drawings
FIG. 1 is a flow chart of a molding process of a multi-convex hull structure in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural view of a drawing and pressing punch used in the method of the embodiment of the invention;
FIG. 3 is a schematic structural view of a female die for stretching and pressing wire used in the method of the embodiment of the invention;
fig. 4 is a schematic structural diagram of the method for adjusting the flatness of a structural member of a product according to the embodiment of the invention.
The drawings are as follows: the stretching wire punch 21, the stretching wire die 22, the protrusion 211, the groove 221, the upper adjusting member 41, the lower adjusting member 42, the base plate 411, and the adjusting lever 412.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
The embodiment of the invention provides a molding process of a multi-convex hull structural member, as shown in fig. 1, comprising the following steps:
and 10, carrying out initial stamping on the material sheet to form a convex hull, and obtaining an initial structural member. The convex hull is positioned in the middle area of the initial structural member, and the periphery of the initial structural member is a flange surface.
Specifically, the material sheet is subjected to punch forming by adopting an adaptive convex hull male die and an adaptive convex hull female die, so that an initial structural member is obtained, and a convex hull is formed in the middle area of the initial structural member.
In the step, the material is initially stamped, the initial stamping is a shallow stamping, and the height of the formed convex hull is low. Wherein the definition of the shallow and deep punches is that the height of the forming of the convex hull is dependent on the size of the material sheet. In general, a sheet of material having a length and a width of about 100mm is punched in a shallow press to form a convex hull having a height of 50mm or more, and is punched in a deep press to form a convex hull having a height of 50mm or more.
And 20, carrying out deep stamping on the initial structural member, and setting a pressing line on a flange surface of the initial structural member while carrying out deep stamping to obtain the primary structural member.
Specifically, the initial member is formed by punching using an adapted stretch-press punch and stretch-press die, as shown in fig. 2 and 3. The stretching line pressing male die 21 is provided with a protrusion 211, the stretching line pressing female die 22 is provided with a groove 221 matched with the protrusion, and the stretching line pressing male die downwardly extrudes the initial structural member, so that the convex hull of the initial structural member is deeply punched and stretched, and meanwhile, a line pressing is formed on the flange surface of the initial structural member. The stretching line pressing male die can be made into an insert push type structure, and the back of the stretching line pressing male die is provided with a spring ejector rod for supporting, so that when the stretching line pressing male die presses a flange surface of a product, the stretching line pressing male die has certain rebound, and deeper marks are prevented from being left on the flange surface.
And 30, performing accurate stamping forming on the primary-adjustment structural member to obtain a product structural member.
Specifically, the male die and the female die are designed according to the 3D digital die of the product, and the contour precision and the size of the product are punched to meet the drawing requirements. The accurate stamping forming further comprises trimming, punching, lettering, chamfering around, deburring and the like.
In the molding process of the multi-convex hull structural member in the embodiment, the plurality of convex hulls are formed by initial stamping, the initial stamping is shallow stamping, and the stress, the fold and the warping degree are small. And when the deep stamping is performed, the pressing line is arranged on the flange surface around the convex hull, so that the stress in the material during stamping and stretching is reduced, the folds and the warpage generated on the flange surface during the flattening and stretching can be reduced, and the planeness of the flange surface of the initial structural member is ensured. Meanwhile, when the step 30 is performed with accurate stamping, the pressing line forms a flow blocking groove on the flange surface, so that stress deformation generated during accurate stamping is reduced, material flow in the middle area during stamping and stretching is reduced, the flange surface is prevented from being increased in folds and warping due to repeated stamping and stretching, flatness of the flange surface is ensured, the flatness can reach 0.08mm, and accordingly product quality is improved. The product quality precision and the productivity efficiency are greatly improved, the die can be stably produced in whole shifts, the OEE of equipment reaches more than 80%, and the manufacturing cost is reduced. The problem of frequent die adjustment is not needed, the energy consumption of the equipment is reduced, the utilization rate of raw materials is high, and the raw materials are not wasted in die adjustment.
Preferably, the wire is laid out in full turns around the periphery of the intermediate zone. As shown in fig. 2, the protrusion 211 of the stretch yarn pressing male die 21 is a complete circle protrusion, and the groove 221 of the stretch yarn pressing female die 22 is a complete circle groove, so that the yarn pressed is laid out in a complete circle. Compared with the sectional type line ball, the whole circle line ball has better choked flow effect, can prevent the local warpage of sectional area, unevenness. Preferably, through the mould design, realize that every convex closure periphery all sets up the line ball, further improve the choked flow effect, improve the planarization.
Preferably, the line pressing is of a line groove structure, and considering that the line pressing is too deep to influence the strength of the line pressing part, if too shallow to influence the leveling effect, the depth of the line pressing in the embodiment is not more than 30% of the thickness of the flange surface of the initial structural part and is not less than 0.1mm. The line is not less than 5mm from the edge of the initial structural member.
As a preferred example, the method of this embodiment further includes:
and step 40, adjusting the flatness of the product structural member to obtain the finished product structural member. Preferably, the flatness of the flange face of the product structural member is adjusted as well as the flatness of the intermediate region of the product structural member.
According to the method, the secondary deformation is caused to the flange surface of the product and the flatness of the multi-convex hull outline in the middle by considering the accurate stamping forming process, and after accurate stamping forming, the flatness of the whole product structural member is adjusted, so that the whole flatness accuracy of the product is ensured, and the product quality is further improved.
Preferably, in step 40, the product structural member is measured by using a three-dimensional measuring device, and the flatness of the product structural member is adjusted by using a leveling assembly according to the measurement result.
Preferably, the leveling assembly comprises an upper adjusting member 41 and a lower adjusting member 42, as shown in fig. 4, the upper adjusting member 41 comprises a base plate 411, a plurality of adjusting rods 412 are arranged on the base plate 411, and the distance between the end face of the adjusting rod 412 and the base plate 411 is adjustable. The lower adjusting member 42 has the same structure as the upper adjusting member 41. Preferably, the end face of the adjusting rod 412 is provided with a resin layer, or the adjusting rod 412 adopts a resin screw, the rod part of the resin screw is in threaded connection with a threaded hole on the substrate, and the part of the head part of the resin screw, which is used for abutting against the product structural part and is in contact with the product, is made of a resin material, so that the product appearance is protected.
Preferably, the distance between adjacent adjusting rods of the upper adjusting piece is 0.05-0.1 mm. The upper adjusting piece is provided with a plurality of adjusting rods, the lower adjusting piece is provided with a plurality of adjusting rods, the adjusting rods of the upper adjusting piece and the adjusting rods of the lower adjusting piece are arranged in one-to-one correspondence, and flatness adjustment of the product structural part is achieved. If the number of the adjusting rods is too small, the flatness adjustment of the whole product structural member is difficult to realize.
In step 40, according to the measurement result, the flatness of the product structural member is adjusted by using the leveling component, which specifically includes:
the base plate 411 of the upper adjusting member 41 is fixed above the product structural member, and the end surfaces of all the adjusting rods 412 of the upper adjusting member abut against the upper surface of the product structural member. The base plate of the lower adjusting member 42 is fixed below the product structural member, and the end surfaces of all the adjusting rods of the lower adjusting member abut against the lower surface of the product structural member. And all the adjusting rods of the upper adjusting piece are respectively opposite to all the adjusting rods of the lower adjusting piece one by one.
According to the flatness view of the product structural member measured by the three-dimensional measuring device, if the local point position of the product structural member is higher than the periphery, the adjusting rod of the upper adjusting member positioned on the upper surface of the local point position is downwards adjusted to increase the distance between the end face of the adjusting rod of the upper adjusting member and the substrate of the upper adjusting member, and the adjusting rod of the lower adjusting member positioned on the lower surface of the local point position is downwards adjusted to shorten the distance between the end face of the adjusting rod of the lower adjusting member and the substrate of the lower adjusting member. The adjusting rod of the upper adjusting piece presses down the local point of the product structural member so that the local point is flush with the periphery. If the local point position of the product structural member is lower than the periphery, the adjusting rod of the upper adjusting member positioned on the upper surface of the local point position is adjusted upwards to shorten the distance between the end face of the adjusting rod of the upper adjusting member and the substrate of the upper adjusting member, and the adjusting rod of the lower adjusting member positioned on the lower surface of the local point position is adjusted upwards to increase the distance between the end face of the adjusting rod of the lower adjusting member and the substrate of the lower adjusting member. The adjusting rod of the lower adjusting piece pushes the local point upwards so that the local point is flush with the periphery.
In the embodiment, according to the view of measuring the flatness by three coordinates, the unevenness of the local point positions is clearly seen, and the height of the adjusting rod is adjusted by the adjustment of the vector, so that the height of the local point positions is adjusted, and the overall flatness accuracy of the product is ensured.
The forming process provided by the embodiment of the invention adopts a whole circle of wire pressing process after initial stamping and adopts a screw leveling process after accurate stamping forming, so that the flatness of the product is effectively ensured, the product can be quickly adjusted, the flatness can be stably controlled within 0.05mm, the high-precision manufacturing requirement is met, meanwhile, the whole-shift stable stamping production is realized, the equipment OEE (equipment comprehensive efficiency) is greatly improved, and the manufacturing cost is reduced.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention.
Claims (10)
1. The molding process of the multi-convex hull structural member is characterized by comprising the following steps of:
step 10, carrying out initial stamping on a material sheet to form a convex hull so as to obtain an initial structural member; the convex hull is positioned in the middle area of the initial structural member, and the periphery of the initial structural member is a flange surface;
step 20, carrying out deep stamping on the initial structural member, and setting a pressing line on a flange surface of the initial structural member while carrying out deep stamping to obtain an initial structural member;
and step 30, performing accurate stamping forming on the primary-adjustment structural member to obtain a product structural member.
2. The molding process of claim 1, wherein the wire is laid out in full turns around the periphery of the intermediate region.
3. The molding process according to claim 1, wherein the wire is of a wire groove structure, and the depth of the wire is not more than 30% and not less than 0.1mm of the thickness of the flange face of the initial structural member.
4. The molding process of claim 1, further comprising:
and step 40, adjusting the flatness of the product structural member to obtain a finished product structural member.
5. The molding process of claim 4, wherein adjusting the flatness of the product structure in step 40 includes adjusting the flatness of the flange face of the product structure and adjusting the flatness of the intermediate area of the product structure.
6. The molding process of claim 4, wherein in step 40, the product structure is measured by a three-dimensional measuring device, and the flatness of the product structure is adjusted by a leveling assembly according to the measurement result.
7. The molding process of claim 6, wherein the leveling assembly comprises an upper adjusting member and a lower adjusting member, the upper adjusting member comprises a base plate, an adjusting rod is arranged on the base plate, and a distance between an end face of the adjusting rod and the base plate is adjustable; the structure of the lower adjusting piece is the same as that of the upper adjusting piece.
8. The molding process according to claim 7, wherein in step 40, the flatness of the product structural member is adjusted by the leveling assembly according to the measurement result, specifically comprising:
fixing the base plate of the upper adjusting piece above the product structural piece, wherein the end faces of all the adjusting rods of the upper adjusting piece are abutted against the upper surface of the product structural piece; fixing the base plate of the lower adjusting piece below the product structural piece, wherein the end faces of all adjusting rods of the lower adjusting piece are abutted against the lower surface of the product structural piece; all the adjusting rods of the upper adjusting piece are respectively opposite to all the adjusting rods of the lower adjusting piece one by one;
according to the flatness view of the product structural member measured by the three-dimensional measuring device, if the local point position of the product structural member is higher than the periphery, the adjusting rod of the upper adjusting member positioned on the upper surface of the local point position is downwards adjusted to increase the distance between the end face of the adjusting rod and the substrate, and the adjusting rod of the lower adjusting member positioned on the lower surface of the local point position is downwards adjusted to shorten the distance between the end face of the adjusting rod and the substrate; the adjusting rod of the upper adjusting piece downwards presses the local point of the product structural member so that the local point is flush with the periphery;
if the local point position of the product structural member is lower than the periphery, an adjusting rod of an upper adjusting member positioned on the upper surface of the local point position is adjusted upwards to shorten the distance between the end face of the adjusting rod and the substrate, and an adjusting rod of a lower adjusting member positioned on the lower surface of the local point position is adjusted upwards to increase the distance between the end face of the adjusting rod and the substrate; the adjusting rod of the lower adjusting piece pushes up the local point position of the product structural piece, so that the local point position is flush with the periphery.
9. The molding process of claim 7, wherein the adjusting rod is a resin screw, a rod portion of the resin screw is in threaded connection with a threaded hole in the substrate, and a head portion of the resin screw is used for abutting against the product structural member; and/or the end face of the adjusting rod is provided with a resin layer.
10. The molding process of claim 7, wherein a distance between adjacent adjusting bars of the upper adjusting member is 0.05 to 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310825919.3A CN116550867B (en) | 2023-07-07 | 2023-07-07 | Forming process of multi-convex hull structural member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310825919.3A CN116550867B (en) | 2023-07-07 | 2023-07-07 | Forming process of multi-convex hull structural member |
Publications (2)
| Publication Number | Publication Date |
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| CN116550867A true CN116550867A (en) | 2023-08-08 |
| CN116550867B CN116550867B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310825919.3A Active CN116550867B (en) | 2023-07-07 | 2023-07-07 | Forming process of multi-convex hull structural member |
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| Publication number | Publication date |
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| CN116550867B (en) | 2024-03-08 |
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