CN111169838B - End socket and forming method thereof - Google Patents

End socket and forming method thereof Download PDF

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Publication number
CN111169838B
CN111169838B CN201811329121.5A CN201811329121A CN111169838B CN 111169838 B CN111169838 B CN 111169838B CN 201811329121 A CN201811329121 A CN 201811329121A CN 111169838 B CN111169838 B CN 111169838B
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China
Prior art keywords
outer ring
lower outer
forming
top circle
upper top
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CN201811329121.5A
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CN111169838A (en
Inventor
秦建建
徐云飞
张建斌
张菲
葛环兵
罗义顺
张海峰
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Zhongji Anruichun Technology Co ltd
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China International Marine Containers Group Co Ltd
CIMC Enric Investment Holdings Shenzhen Co Ltd
Ziemann Holvrieka Asia Co Ltd
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Application filed by China International Marine Containers Group Co Ltd, CIMC Enric Investment Holdings Shenzhen Co Ltd, Ziemann Holvrieka Asia Co Ltd filed Critical China International Marine Containers Group Co Ltd
Priority to CN201811329121.5A priority Critical patent/CN111169838B/en
Publication of CN111169838A publication Critical patent/CN111169838A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/54—Gates or closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention provides a seal head and a forming method thereof, wherein the forming method of the seal head comprises the steps of pressing and forming the upper top circle of the seal head in sections; rolling the lower outer ring of the formed end socket; welding an upper top circle and a lower outer ring in a pairing mode to form a seal head; pressing and forming the paired lower outer rings to enable the lower outer rings to form an arc shape with a preset shape; and carrying out flanging forming on the lower outer ring after the pressing forming. In the forming method of the end socket, the upper top circle and the lower outer ring are respectively pressed and formed, and when the upper top circle and the lower outer ring are combined, the lower outer ring is not pressed, so that the precision requirement of the combination of the upper top circle and the lower outer ring is reduced to a certain extent, the operation is relatively simple during the combination, the difficulty of manual assembly is reduced, and a large amount of labor cost and time cost are saved. Because the lower outer ring and the upper top circle are not pressed in positioning, the radian of the upper top circle and the radian of the lower outer ring do not need to be positioned, and a special jig frame does not need to be used.

Description

End socket and forming method thereof
Technical Field
The invention relates to the technical field of end socket forming, in particular to an end socket and a forming method thereof.
Background
In the manufacturing process of food, beverage and chemical containers, the large-diameter thin-wall end socket is more and more widely used. At present, the domestic manufacture of large-diameter thin-wall end sockets is limited by the processing capacity of a pressing device such as a drum press, and cannot be formed at one time, and the large-diameter thin-wall end sockets are generally manufactured in a segmented mode, for example, a mode of pressing a top arc-shaped template and peripheral watermelon petals in a segmented mode. In the manufacturing method, after the top arc-shaped plate and the petals are pressed and formed, pre-assembly, cutting correction, re-assembly, welding, correction and the like are required on the jig frame. The welding and nondestructive testing workload is large, the labor investment is large, the manufacturing period is long, and the cost is high. Meanwhile, the welding quality and the welding deformation need to be controlled, and the manufacturing difficulty is high.
Disclosure of Invention
The invention aims to provide a seal head and a forming method which do not need to use a special jig frame and reduce manual assembly, so as to solve the problems in the prior art.
In order to solve the technical problem, the invention provides a method for forming a seal head, which comprises the following steps: pressing and forming the top circle of the upper part of the seal head in sections; rolling and forming a lower outer ring of the end socket; the upper top circle and the lower outer ring are welded in a pairing mode to form the seal head; pressing and forming the paired lower outer rings to enable the lower outer rings to form an arc shape with a preset shape; and carrying out flanging forming on the lower outer ring after the pressing forming.
In one embodiment, the welding the upper top circle and the lower outer ring to form the head comprises: positioning the upper vertex circle; the lower outer ring is sleeved on the periphery of the upper top circle from top to bottom, so that the lower outer ring is clamped on the bottom edge of the upper top circle and is partially overlapped with the upper top circle; cutting a portion of the lower outer ring overlapping the upper tip circle such that the lower outer ring butts against the upper tip circle; and welding the lower outer ring and the top circle at the butt joint of the lower outer ring and the top circle to form the seal head.
In one embodiment, the upper top circle is placed on a support frame with the opening facing downwards, the support frame is provided with a support platform, the size of the support platform is smaller than that of the bottom edge of the upper top circle, so that the support platform extends into the upper top circle, and the distance from the bottom end of the support frame to the bottom end of the upper top circle is not smaller than that of the lower outer ring.
In one embodiment, the step of rolling and forming the lower outer ring of the seal head includes: providing a plurality of plates; cutting each plate to obtain a plurality of fan rings; and splicing the fan rings and then rolling to form the lower outer ring.
In one embodiment, the step of splicing the fan rings is performed by automatic welding by a welding robot.
In one embodiment, the splicing between the fan rings is performed in a manner that straight edges are butted against straight edges.
In one embodiment, the step of splicing the fan rings and rolling to form the lower outer ring comprises: splicing a plurality of fan rings and then winding to form a first outer ring; splicing a plurality of fan rings and then winding to form a second outer ring; and splicing the first outer ring and the second outer ring to obtain the lower outer ring.
In one embodiment, the step of forming the lower outer ring into an arc with a predetermined shape by pressing the lower outer ring after the forming group comprises: placing the assembled upper top circle and the lower outer ring with the openings facing upwards on a pressing device; and spinning the lower outer ring to form the arc of the preset shape on the lower outer ring.
In one embodiment, before the step of forming the lower outer ring into the arc shape with the predetermined shape by pressing the lower outer ring after the forming group, the method further comprises: welding a reinforcing plate on the outer side of the upper top circle, wherein the reinforcing plate covers the outer surface of the top circle part and is connected through spot welding; after the step of press forming the lower outer ring into an arc of a predetermined shape, the method further comprises: removing the reinforcing plate.
In one embodiment, the step of press-forming the upper tip circle of the seal head by sections comprises: cutting a central plate to make the central plate circular; and placing the cut central plate on a pressing device for pressing to form the upper top circle with a preset radian.
The invention also provides the end socket which comprises an upper top circle and a lower outer ring arranged below the upper top circle, wherein the lower surface of the upper top circle is in butt joint with the upper surface of the lower outer ring, the upper top circle is formed through a first pressing process, and the lower outer ring is formed through a second pressing process after being welded with the upper top circle in pair.
In one embodiment, the lower outer ring is formed by splicing a plurality of fan rings and then rolling.
In one embodiment, the ratio of the height of the upper tip circle to the height of the lower outer ring is 1.25 to 1.6.
In one embodiment, the wall thickness of the seal head is not less than 14 mm.
In one embodiment, the diameter of the end socket is 10m-12 m.
The forming method of the seal head comprises the steps of firstly pressing and forming an upper top circle of the seal head, then rolling and forming a lower outer ring of the seal head, then assembling and welding the upper top circle and the lower outer ring, then pressing and forming the assembled lower outer ring to enable the lower outer ring to form an arc shape with a preset shape, and finally performing flanging forming on the pressed and formed lower outer ring to obtain the seal head. The upper portion top circle and the lower part outer loop are respectively press-formed, and when the upper portion top circle is paired with the lower part outer loop, the lower part outer loop is not pressed yet, therefore, to a certain extent, the precision requirement of the upper portion top circle and the lower part outer loop are paired is reduced, and the pairing operation is relatively simple, the difficulty of manual assembly is reduced, and a large amount of labor cost and time cost are saved. Because the lower outer ring and the upper top circle are not pressed in positioning, the radian of the upper top circle and the radian of the lower outer ring do not need to be positioned, and a special jig frame does not need to be used.
The forming method only has two pressing forming processes, reduces the pressing forming times compared with the prior art, and further improves the manufacturing efficiency of the end socket. And the upper top circle and the lower outer ring of the end socket are respectively pressed by the two pressing and forming processes, so that the method is particularly suitable for manufacturing large end sockets.
Drawings
Fig. 1 is a flow chart of the forming method of the seal head of the invention.
Fig. 2 is a schematic view of the upper tip circle of the present invention.
FIG. 3 is a flow chart of the splicing and winding of the lower outer ring of the present invention.
FIG. 4 is a flow chart of splicing and winding of one embodiment of the lower outer ring of the present invention
Fig. 5 is a schematic view of the joint between the fan ring and the fan ring according to the present invention.
Fig. 6 is a schematic structural view of the lower outer ring of the present invention before pressing.
FIG. 7 is a flow chart of the pairing of the upper tip circle and the lower outer ring of the present invention.
FIG. 8 is a schematic diagram of the assembly of the upper top circle and the lower outer ring of the present invention.
Fig. 9 is a schematic structural view of the closure of the present invention.
The reference numerals are explained below: 1. sealing the end; 11. the upper part is rounded; 12. a lower outer ring; 121/121a/121b/121c, fan ring.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.
Referring to fig. 1, the present invention provides a method for forming a head 1, including the steps of:
and S1, pressing and forming the upper top circle 11 of the seal head 1 in sections.
Specifically, the step S1 includes:
s11, cutting the central panel to make it circular.
A sheet of center plate to be cut is provided, the material of the center plate to be cut may be stainless steel or other hard metal, and the shape may be round, square or other regular or irregular shape.
The center plate to be cut is positioned and the edge of the center plate to be cut is cut so that the center plate is substantially circular.
S12, the cut central panel is placed on a pressing device and pressed to form an upper top circle 11 having a predetermined curvature.
The upper dome 11 may be spun from the central plate by a spinning device. The spinning is to fix a flat blank on a die of a spinning device, and a pressing hammer or a spinning wheel is used for pressing the blank while the blank rotates along with a main shaft of the spinning device so as to generate local plastic deformation; under the combined action of the feeding motion of the press hammer or the rotary wheel and the rotating motion of the blank, the local plastic deformation is gradually expanded to the whole surface of the blank and is tightly attached to the die, and the spinning processing of the part is completed. Wherein the spinning device can be a drum press.
The spinning process for the center plate may be: and pressing from outside to inside along the circumferential direction of the central plate by using a pressing hammer of a spinning device, namely spinning the outer ring of the central plate along the circumferential direction of the central plate, pressing the adjacent area of the outer ring inwards, and so on until the pressing of the centremost area of the central plate is finished, and finally obtaining the top circle 11 of the upper part.
By the above press forming process, not only the center panel can be formed (i.e., the upper dome 11 is shaped like a pot), but also the ductility of the upper dome 11 is improved by the press forming process.
After the process of step S1, the upper top circle 11 shown in fig. 2 is obtained in the shape of an inverted pot, that is, the opening of the upper top circle 11 faces downward, and the diameter of the top-to-bottom opening gradually increases. The top of the top circle 11 of the upper part is transited to the bottom arc and is consistent with the radian of the end socket 1.
After the process of step S1 is completed, the surface of the upper vertex circle 11 may be smoothed by a thinning process.
In one embodiment, the height of the upper dome 11 is approximately 60% of the height of the entire closure 1. In actual application, the method can be selected according to specific situations.
S2, rolling and forming the lower outer ring 12 of the seal head 1;
referring to fig. 3, S2 includes:
and S21, providing a plurality of plates.
S22, cutting each plate to obtain a plurality of fan rings 121.
Each provided plate can be a rectangular plate or a plate with an irregular shape. In one embodiment, the plate is cut into a fan shape, and then the upper portion of the fan shape is cut off to obtain the fan ring 121 of the lower portion. In another embodiment, the fan ring 121 can be obtained by directly cutting the fan ring 121 in a rectangular plate.
Specifically, the fan ring 121 includes a first arc edge, a second arc edge, and two straight edges connected between the first arc edge and the second arc edge. The center of the circle where the first arc edge is located coincides with the center of the circle where the second arc edge is located, and the central angle of the first arc edge is the same as that of the second arc edge. Specifically, the fan ring 121 is blanked along the cone-like shape of the head 1. The cone-like shape of the end socket 1 is a cone formed by taking the top point of the end socket 1 as the top point, taking the circle with the maximum diameter at the bottom of the end socket 1 as the bottom circle and extending a plurality of side edges from the top point to the bottom circle, wherein the cone is the cone-like shape of the end socket 1. The central angle of the fan ring 121 thus corresponds to the conical-like central angle of the closure head 1. In one embodiment, the fan ring 121 has a central angle of 324 °.
And S23, splicing the fan rings 121, and rolling to form the lower outer ring 12.
In one embodiment, all the fan rings 121 forming the lower outer ring are spliced together, and then the spliced fan rings 121 are rolled to finally form the annular lower outer ring 12.
In another embodiment, the fan rings 121 forming the lower outer ring 12 may be divided into a plurality of sets of fan rings 121, each fan ring 121 is rolled after being spliced, and finally the rolled sets of fan rings 121 are spliced together.
Specifically, referring to fig. 4, in one embodiment, step S23 includes:
s231, after the fan rings 121 are spliced, winding to form a first outer ring.
For example, referring to fig. 5, the straight edges of the fan rings 121a are connected to the straight edges of the fan rings 121b in a butt joint manner to form an assembly of the fan rings 121a and 121b, and then the straight edges of the third fan ring 121c are connected to one of the straight edges of the assembly in a butt joint manner to obtain an assembly of the fan rings 121a, 121b and 121c, which is then connected in sequence to obtain an assembly of a plurality of fan rings, and then the assembly is wound to obtain a first outer ring.
The splicing among the fan rings is completed through automatic welding by a welding robot, so that a large amount of time is saved, the welding deformation is reduced, and the welding quality is improved.
And S232, splicing the fan rings 121 and then winding to form a second outer ring.
The forming method of the second outer ring is the same as the forming method of the first outer ring, please refer to the forming process of the first outer ring, which is not described herein again.
In this embodiment, the first outer ring and the second outer ring are formed by splicing and winding the same number of fan rings 121. In other embodiments, the first outer ring and the second outer ring may be formed by splicing and winding a different number of fan rings 121. In practical application, the number of the fan rings 121 and the size of the fan rings 121 are set according to the size of the head 1 and the size of the plate.
And S233, splicing the first outer ring and the second outer ring to obtain the lower outer ring 12.
Two straight edges at two ends of the first outer ring respectively correspond to two straight edges at two ends of the second outer ring, and the straight edges of the first outer ring are in butt joint with the straight edges of the second outer ring, so that the lower outer ring 12 is obtained.
The first outer ring and the second outer ring can be spliced through manual welding, so that the assembly precision of the first outer ring and the second outer ring is improved.
In other embodiments, the lower outer ring 12 may also be formed into a first outer ring, a second outer ring, and a third outer ring, and then spliced together, which may be specifically set according to practical applications.
Referring to fig. 6, the lower outer ring 12 obtained by the above process has a truncated cone shape, and the outer circumference of the lower outer ring 12 extends in a tangential direction of the upper vertex circle 11. In one embodiment, the taper of the lower outer ring 12 is 132 °.
The lower outer ring 12 is obtained by winding after splicing a plurality of fan rings 121, so that the method is particularly suitable for manufacturing the lower outer ring 12 of the large-diameter seal head 1. Preferably, the lower outer ring 12 has a maximum diameter of 10m to 12 m.
And S3, welding the upper top circle 11 and the lower outer ring 12 in pair to form the seal head 1.
Referring to fig. 7, in one embodiment, step S3 includes:
and S31, positioning the top circle.
In this embodiment, the upper dome 11 is placed on the support frame with its opening facing downward.
The support frame is provided with a support platform, the size of the support platform is smaller than that of the bottom edge of the upper top circle 11, so that the support platform extends into the upper top circle 11, and the distance from the bottom end of the support frame to the bottom end of the upper top circle 11 is not smaller than that of the lower outer ring 12. The support frame can be a workbench or a support rod, and can support the upper support circle 11. Because the precision requirement of the upper top circle 11 on the support frame is not high, the support frame can be obtained anywhere.
S32, the lower outer ring 12 is fitted over the outer circumference of the upper top circle 11 from top to bottom, so that the lower outer ring 12 is caught at the bottom edge of the upper top circle 11 and the lower outer ring 12 is partially overlapped with the upper top circle 11.
In one embodiment, a support seat can be further disposed below two opposite sides of the lower outer ring 12, and the support force provided by the support seat is smaller than the gravity of the lower outer ring 12, so that the lower outer ring 12 is clamped with the upper top circle 11 due to a smaller acting force, and damage to the upper top circle 11 when the lower outer ring 12 falls directly due to too large gravity is avoided.
S33, cutting the portion of the lower outer ring 12 overlapping the upper top circle 11 so that the lower outer ring 12 is butted against the upper top circle 11.
In this embodiment, a line is drawn on the lower outer ring 12 along the opening edge of the upper dome 11, and then a cutting device cuts along the line to remove the portion of the lower outer ring 12 overlapping the upper dome 11, so that the lower outer ring 12 is butted against the upper dome 11. And S34, welding the lower outer ring 12 and the top circle at the butt joint of the lower outer ring 12 and the top circle 11 to form the seal head 1.
Preferably, the welding of the butt joint of the lower outer ring 12 and the upper top circle 11 can adopt manual welding, and the pairing precision between the lower outer ring 12 and the upper top circle 11 can be increased.
In another embodiment, the size of the lower outer ring 12 just meets the size requirement of the seal head 1 after the upper top circle 11 is removed, so the upper surface of the lower outer ring 12 just abuts against the lower surface of the upper top circle 11 without cutting the lower outer ring 12.
Referring to fig. 8, in the seal head 1 obtained by the above process, the upper top circle 11 is formed by pressing, the radian of the upper top circle is consistent with that of the seal head 1, the lower outer ring 12 is not pressed and still takes the shape of a circular truncated cone, and the periphery of the lower outer ring 12 extends along the tangential direction of the upper top circle 11. In the process method, when the upper top circle 11 and the lower outer ring 12 are paired, the lower outer ring 12 is not pressed, so that the accuracy requirement of pairing the upper top circle 11 and the lower outer ring 12 is reduced to a certain extent, the lower outer ring 12 is sleeved on the periphery of the upper top circle 11 from top to bottom during pairing, and the lower outer ring 12 is butted with the upper top circle 11. Because the lower outer ring 12 and the upper top circle 11 are not pressed in positioning, the radian of the upper top circle 11 and the radian of the lower outer ring 12 do not need to be positioned, the positioning precision requirement between the upper top circle and the lower top circle is reduced, and a special jig frame does not need to be used.
S4, press-forming the paired lower outer rings 12 to form the lower outer rings 12 into an arc shape of a predetermined shape.
Specifically, in one embodiment, step S4 includes: firstly, the upper top circle 11 and the lower outer ring 12 which are paired up are placed on a pressing device with the openings facing upwards, and then the lower outer ring 12 is spun by a pressing hammer of the pressing device so that the lower outer ring 12 forms an arc shape with a preset shape. The pressing principle of the lower outer ring 12 is the same as that of the upper top circle 11, the outer ring is firstly spun along the circumferential direction, then the adjacent areas of the outer ring are pressed inwards, and the like is repeated until all the areas of the lower outer ring 12 are pressed, and finally the arc shape with the preset shape is formed.
Referring to fig. 9, in the closure 1 formed by the above process, the lower outer ring 12 has been formed into an arc shape of a predetermined shape by pressing. Only the lower outer ring 12 needs to be pressed separately in this process.
Preferably, the step of press forming the paired rear lower outer rings 12 to form the lower outer rings 12 into an arc of a predetermined shape further includes: the reinforcing plate is welded to the outside of the upper dome 11, covering the outer surface of the dome portion. The reinforcing plate serves to protect the upper apex circle 11 when the lower outer ring 12 is pressed. The reinforcing plates are connected by spot welding.
The step of press forming the paired rear lower outer rings 12 to form the lower outer rings 12 into an arc shape of a predetermined shape further includes: the reinforcing plate is removed. Because the reinforcing plate is connected with the upper top circle 11 through spot welding, the end socket 1 cannot be influenced when the reinforcing plate is removed. The reinforcing plate can also be removed after the next flanging forming process is finished.
And S5, flanging and forming the lower outer ring 12 after the press forming to enable the end socket 1 to have a folded edge, and obtaining the final end socket 1.
In the forming method of the seal head 1, an upper top circle 11 of the seal head 1 is pressed and formed, a lower outer ring 12 of the seal head 1 is rolled and formed, the upper top circle 11 and the lower outer ring 12 are welded in an assembling mode, the assembled lower outer ring 12 is pressed and formed, the lower outer ring 12 is made to form an arc shape with a preset shape, and finally the pressed and formed lower outer ring 12 is turned over to form the seal head 1. When the upper top circle 11 and the lower outer ring 12 are paired, the lower outer ring 12 is not pressed yet, so that the requirement on precision when the upper top circle 11 and the lower outer ring 12 are paired is reduced to a certain extent, the pairing operation is relatively simple, the difficulty of manual assembly is reduced, and a large amount of labor cost and time cost are saved. Because the lower outer ring 12 and the upper top circle 11 are not pressed in positioning, the radian of the upper top circle 11 and the radian of the lower outer ring 12 do not need to be positioned, the positioning precision requirement is reduced, and a special jig frame does not need to be used.
The forming method only has two pressing forming processes, reduces the pressing forming times compared with the prior art, and further improves the manufacturing efficiency of the end socket 1. And the upper top circle 11 and the lower outer ring 12 of the seal head 1 are respectively pressed through the two pressing forming processes, and the method is particularly suitable for manufacturing large seal heads 1.
The invention also provides the end socket 1, and the end socket 1 is prepared by the forming method of the end socket 1 and can be disc-shaped, oval-shaped, hemispherical or spherical crown-shaped.
Referring to fig. 9, the seal head 1 includes an upper top circle 11 and a lower outer ring 12 disposed below the upper top circle 11, a lower surface of the upper top circle 11 is in abutting connection with an upper surface of the lower outer ring 12, the upper top circle 11 is formed by a first pressing process, and the lower outer ring 12 is formed by a second pressing process after being paired and welded with the upper top circle 11.
The size of the lower outer ring 12 is not smaller than that of the flanging of the seal head 1, and the size of the upper top circle 11 is not larger than the size of the seal head 1 minus the size of the flanging, so that the flanging of the seal head 1 is directly formed by flanging the lower outer ring 12, the flanging of the seal head 1 is prevented from being jointly formed by the upper top circle 11 and the lower outer ring 12, and the structural strength of the flanging is further improved. Preferably, the ratio of the height of the lower outer ring 12 to the height of the upper apex circle 11 is 1.25 to 1.6.
Furthermore, the wall thickness of the end socket 1 is not less than 14mm, so that the forming quality of the end socket 1 is ensured.
The end socket 1 is divided into an upper top circle 11 and a lower outer ring 12 along the height direction of the end socket 1, and the lower outer ring 12 is formed by rolling after being spliced by a plurality of fan rings 121, so the end socket 1 is particularly suitable for large-scale end sockets 1. Preferably, the diameter of the end socket 1 is 10m-12 m.
In this embodiment, the lower outer ring 12 is formed by rolling after the fan rings 121 are spliced, and the lower outer ring 12 is suitable for manufacturing a large end enclosure by sectional manufacturing.
The end socket is divided into an upper top circle and a lower outer ring, the lower surface of the upper top circle is connected with the upper surface of the lower outer ring in a facing mode, the upper top circle is formed through a first pressing process, and the lower outer ring is formed through a second pressing process after being welded with the upper top circle in a pairing mode. Therefore, the end socket has low requirement on precision during assembly, the operation during assembly is relatively simple, the difficulty of manual assembly is reduced, and a large amount of labor cost and time cost are saved. And the lower outer ring and the upper top circle are not pressed in positioning, so that the radian of the upper top circle and the radian of the lower outer ring do not need to be positioned, the positioning precision requirement is reduced, and a special jig frame does not need to be used. The end socket disclosed by the invention is formed by two-time pressing forming process, and compared with the prior art, the number of pressing forming times is reduced, so that the manufacturing efficiency of the end socket is improved. And the upper top circle and the lower outer ring of the end socket are respectively pressed by the two pressing and forming processes, so that the method is particularly suitable for manufacturing large end sockets.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (15)

1. A forming method of a seal head is characterized by comprising the following steps:
pressing and forming the top circle of the upper part of the seal head in sections;
rolling and forming a lower outer ring of the end socket;
the upper top circle and the lower outer ring are welded in a pairing mode to form the seal head;
pressing and forming the paired lower outer rings to enable the lower outer rings to form an arc shape with a preset shape;
and carrying out flanging forming on the lower outer ring after the pressing forming.
2. A method of forming a head according to claim 1, wherein said step of butt welding said upper dome and said lower outer ring to form said head comprises:
positioning the upper vertex circle;
the lower outer ring is sleeved on the periphery of the upper top circle from top to bottom, so that the lower outer ring is clamped on the bottom edge of the upper top circle and is partially overlapped with the upper top circle;
cutting a portion of the lower outer ring overlapping the upper tip circle such that the lower outer ring butts against the upper tip circle;
and welding the lower outer ring and the top circle at the butt joint of the lower outer ring and the top circle to form the seal head.
3. A method for forming a head according to claim 2, wherein the upper top circle is placed on a support frame with an opening facing downward, the support frame has a support platform, the size of the support platform is smaller than the size of the bottom edge of the upper top circle so that the support platform extends into the upper top circle, and the distance from the bottom end of the support frame to the bottom end of the upper top circle is not smaller than the size of the lower outer ring.
4. A method for forming a head according to claim 1, wherein the step of rolling and forming the lower outer ring of the head comprises:
providing a plurality of plates;
cutting each plate to obtain a plurality of fan rings;
and splicing the fan rings and then rolling to form the lower outer ring.
5. A forming method of a seal head according to claim 4, characterized in that the step of splicing each fan ring is completed by automatic welding of a welding robot.
6. A forming method of a head according to claim 4, wherein the splicing between the fan rings is performed in a way of straight edge to straight edge.
7. A forming method of a head according to claim 4, wherein the step of rolling to form the lower outer ring after splicing the fan rings comprises:
splicing a plurality of fan rings and then winding to form a first outer ring;
splicing a plurality of fan rings and then winding to form a second outer ring;
and splicing the first outer ring and the second outer ring to obtain the lower outer ring.
8. A method of forming a head according to claim 1, wherein the step of pressing the lower outer ring after the forming group to form an arc of a predetermined shape comprises:
placing the assembled upper top circle and the lower outer ring with the openings facing upwards on a pressing device;
and spinning the lower outer ring to form the arc of the preset shape on the lower outer ring.
9. A method of forming a head according to claim 8, wherein the step of pressing the lower outer ring after the forming group to form the lower outer ring into an arc of a predetermined shape is preceded by the step of: welding a reinforcing plate on the outer side of the upper top circle, wherein the reinforcing plate covers the outer surface of the top circle part and is connected through spot welding;
after the step of press forming the lower outer ring into an arc of a predetermined shape, the method further comprises: removing the reinforcing plate.
10. A method of forming a head according to claim 1, wherein the step of sectional press forming the upper dome of the head comprises:
cutting a central plate to make the central plate circular;
and placing the cut central plate on a pressing device for pressing to form the upper top circle with a preset radian.
11. A seal head, characterized in that, the seal head includes upper portion apex circle and lower part outer ring that sets up in upper portion apex circle below, the lower surface of upper portion apex circle with the upper surface butt joint of lower part outer ring connects, the seal head adopts the forming method of the seal head of any claim 1~10 to make.
12. A closure according to claim 11, wherein the lower outer ring is formed by splicing a plurality of fan rings and then rolling.
13. A closure according to claim 11, wherein the ratio of the height of the upper dome to the height of the lower outer ring is 1.25 to 1.6.
14. A closure according to claim 11, wherein the wall thickness of the closure is not less than 14 mm.
15. A closure according to claim 11, wherein the diameter of the closure is 10-12 m.
CN201811329121.5A 2018-11-09 2018-11-09 End socket and forming method thereof Active CN111169838B (en)

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CN112278629B (en) * 2020-09-29 2022-04-29 芜湖中集瑞江汽车有限公司 Wave-proof plate and forming method thereof

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EP1679265A1 (en) * 2005-01-06 2006-07-12 Aisapack Holding SA Tube with non-circular cross-section, its manufacturing method and apparatus therefor
CN100418698C (en) * 2006-09-28 2008-09-17 哈尔滨工业大学 Forming processing method for large-scale loop-forming element
CN101332555B (en) * 2008-08-06 2010-07-21 中国原子能科学研究院 Machining and welding process of large seal head
CN202598123U (en) * 2011-12-28 2012-12-12 四川蓝星机械有限公司 Shell cover for large-scale oil gas recovery storage tank
CN202784454U (en) * 2012-08-01 2013-03-13 河南神州重型封头有限公司 Thin-walled spherical seal head with extra-large diameter and without folded edges
CN203621849U (en) * 2013-11-25 2014-06-04 哈尔滨锅炉厂有限责任公司 Pressed end enclosure for boilers or pressure vessels
CN104763156B (en) * 2015-04-01 2017-01-25 中国核工业华兴建设有限公司 Assembling method of steel safety housing bottom seal head of nuclear power plant
CN105537405A (en) * 2016-01-20 2016-05-04 常州协发机械制造有限公司 Edge turning-up die for edge turning-up inside sealing head
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