CN113770244A - Manufacturing method of upper end enclosure of high-level radioactive waste liquid glass curing container - Google Patents
Manufacturing method of upper end enclosure of high-level radioactive waste liquid glass curing container Download PDFInfo
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- CN113770244A CN113770244A CN202111103826.7A CN202111103826A CN113770244A CN 113770244 A CN113770244 A CN 113770244A CN 202111103826 A CN202111103826 A CN 202111103826A CN 113770244 A CN113770244 A CN 113770244A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a manufacturing method of an upper end enclosure of a high-level radioactive waste liquid glass curing container, which comprises a first step of forming a preset blank mold with a preset neck, wherein the first step comprises the following steps: s1, forming a first blank die by cold stamping the steel plate, wherein the lower part of the first blank die is a cylindrical part, and the upper part of the first blank die is a convex part; s2, performing cold stamping on the bulge of the first blank die to enable the first blank die to form the preset blank die with a preset shoulder and a preset neck, wherein the height of the preset neck is greater than the height of the highest position of the bulge, the height of the preset neck is 105-108mm, and the outer diameter of the preset neck is 149.5-150.3 mm. The method can provide larger volume participating in deformation for the forming of the preset blank die, so that when the preset neck is formed through the bulge, the metal drawing deformation is small, and the possibility of local drawing crack or wall thickness reduction out-of-tolerance can be reduced; the thickness of the steel plate used for forming is reduced, so that the upper end enclosure can be formed by adopting a thinner steel plate.
Description
Technical Field
The invention relates to the technical field of end enclosure forming, in particular to a manufacturing method of an upper end enclosure of a high-level radioactive liquid waste glass curing container.
Background
The first high level radioactive liquid waste glass solidification engineering disposal line is constructed in China at present, high requirements are provided for the technical indexes such as the structural size, the wall thickness and the profile degree of an upper end enclosure of the high level radioactive liquid waste glass solidification container according to the requirements of the disposal line on transportation, filling and storage of the high level radioactive liquid waste glass solidification container, the requirements are difficult to meet according to a conventional manufacturing method, the manufacturing difficulty is high, the upper end enclosure is a rotary body as shown in figure 1 and sequentially comprises a flange surface 14, a neck portion 13, a shoulder portion 12 and a bottom portion 11 from top to bottom, the neck portion 13 is vertically arranged, the flange surface 14 and the neck portion 13 are arranged at 90 degrees, the shoulder portion 12 comprises an inclined portion 121 connected with the bottom portion 11 and a horizontal portion 122 connected with the neck portion 13, the horizontal portion 122 is connected with the inclined portion 121, the bottom portion 11 is cylindrical, and the outer diameter of the bottom portion 11 is the largest.
The upper end enclosure 1 is a typical end enclosure structure formed by combining multiple stretching and flanging from the structural point of view, and the forming mode of the upper end enclosure 1 of the type is generally shown in fig. 2: A. the steel plate is flanged to form the maximum outer diameter of the upper end enclosure 1 to form a blank mold 2 to be extended, the lower part of the blank mold 2 to be extended is a cylindrical part 21, and the upper part of the blank mold 2 to be extended is a closed horizontal plane 22; B. extending the closed horizontal plane 22 upwards to form a preset blank mold 3 with a preset neck 33, wherein the preset blank mold 3 sequentially comprises the preset neck 33, a preset shoulder 32 and a preset cylindrical part 31 from top to bottom, and the preset shoulder 32 is a right-angled part; C. processing and trimming the upper end face and the lower end face of the preset blank mold 3; D. forming the inclined part 121 of the upper end enclosure 1 on the preset shoulder 32; E. flanging the flange surface 14; F. the upper end enclosure 1 is integrally processed to meet the size requirement. And C-E, primarily forming the flange surface 14, the neck 13, the shoulder 12 and the bottom 11 of the upper end enclosure 1, and the step F, wherein the integral processing is to process the primarily formed part which does not meet the size specification again to obtain the final upper end enclosure 1 with the composite specification.
Adopt the problem that above-mentioned conventional upper cover 1 shaping scheme exists: in order to meet the requirement that the wall thickness of the flange surface 14 is within the range of 4.7-5.5mm, the thickness of the steel plate required to be formed is thicker, generally 8.5-10 mm; in addition, in order to meet the final size requirement of the formed upper end enclosure 1, the neck 13, the flange surface 14 and the inclined part 12 which are formed preliminarily need to be integrally processed again; the processing mode of the upper end enclosure 1 has the advantages of high processing difficulty, low efficiency and high cost; in addition, in the process of extending the closed horizontal plane 22 upwards to form the preset blank mold 3 with the preset neck 33, the problem of local tensile crack or over-tolerance wall thickness reduction caused by large metal drawing deformation is easy to occur.
Disclosure of Invention
The invention aims to: the manufacturing method of the upper end enclosure of the high-level radioactive waste liquid glass curing container is provided aiming at the problem that in the process of extending upwards a closed horizontal plane to form a preset blank mold with a preset neck part, local tensile cracking or wall thickness reduction out of tolerance is easily caused by large metal drawing deformation in the forming scheme of the upper end enclosure of the high-level radioactive waste liquid glass curing container in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a manufacturing method of an upper sealing head of a high-level radioactive waste liquid glass solidification container comprises a first step of forming a preset blank mold with a preset neck, wherein the first step comprises the following steps:
s1, forming a first blank die by cold stamping the steel plate, wherein the lower part of the first blank die is a cylindrical part, and the upper part of the first blank die is a convex part;
s2, performing cold stamping on the bulge of the first blank die to enable the first blank die to form the preset blank die with a preset shoulder and a preset neck, wherein the height of the preset neck is greater than the height of the highest position of the bulge, the height of the preset neck is 105-108mm, and the outer diameter of the preset neck is 149.5-150.3 mm.
In the scheme, after the steel plate is formed into the preset blank die with the preset neck in a cold stamping mode, the steps of processing and trimming the upper end face and the lower end face of the preset blank die, forming the inclined part of the upper end enclosure and forming the flange face of the preset shoulder part and the like can be carried out according to the prior art, and the upper end enclosure meeting the specification is obtained. In this scheme, cold stamping technique is prior art, and it is spacing through last bed die, extrudees material or base mould, can the shaping with the base mould of last bed die looks adaptation.
In the scheme, in the step I of forming the preset blank die with the preset neck, a steel plate is subjected to cold stamping to form the blank die I with the lower part being a cylindrical part and the upper part being a convex part, the total volume of the convex part is larger than or equal to the sum of the volume of the inclined part of the upper end enclosure, the volume of the part above the inclined part and the volume of the upper end of the subsequent preset neck, so that each part of the upper end enclosure can be formed, and the volume of the cylindrical part is larger than the sum of the volume of the bottom of the upper end enclosure and the volume of the lower end of the preset blank die. Compared with the existing closed horizontal plane, the bulge part can provide larger volume participating in deformation for the forming of the preset blank die under the steel plate with the same thickness, so that when the preset neck part is formed through the bulge part, the metal drawing deformation is small, and the possibility of local drawing crack or wall thickness reduction out-of-tolerance can be reduced. And because the metal drawing deformation is small, the thickness of the steel plate used for forming is favorably reduced, so that the upper end enclosure can be formed by adopting the steel plate with relatively small thickness.
Preferably, the convex part is a dome-shaped structure, and the top of the dome-shaped structure is flat-topped.
The dome-shaped bulge part is adopted, the shape of the bulge part is matched with the preset blank die, so that when the preset neck part is formed by cold stamping the bulge part, the metal drawing deformation is more uniform, and the more uniform forming thickness of the preset blank die is facilitated. And the mould required by cold stamping to form the dome-shaped bulge is convenient for processing. Except that, adopt the dome-shaped bellying of flat top, the flat top is corresponding to the top of predetermineeing the neck, is favorable to predetermineeing the atress shaping of neck, compares in the arc top, and it can also reduce subsequent cutting volume, reduces the waste volume of material, improves material utilization.
Preferably, the radius of curvature of the arc part of the dome-shaped structure is 250-300mm, and the diameter of the flat top is 170-180 mm.
By adopting the dome-shaped bulge part with the size, the shape and the size of the bulge part are matched with the preset blank die, so that when the preset neck part is formed by cold stamping the bulge part, the metal drawing deformation is more uniform, and the more uniform forming thickness of the preset blank die is facilitated.
Preferably, the step S2 includes the steps of:
firstly, cold stamping the convex part of the first blank die to form an intermediate blank die with an intermediate neck part and an intermediate shoulder part;
and then, carrying out cold stamping on the intermediate neck part for at least one time, so that the diameter of the intermediate neck part of the intermediate blank die is gradually reduced, the height of the intermediate neck part is gradually increased, and the width of the intermediate shoulder part is gradually increased, and finally the intermediate blank die forms the preset blank die.
Compare in the mode of predetermineeing the base mould in the cold stamping formation of adopting once to the bellying, in this scheme, earlier to the bellying cold stamping, after the neck in the middle of forming, carry out cold stamping once at least again to middle neck, be equivalent to carry out cold stamping twice at least to the bellying and form and predetermine the base mould, the size of the used mould of cold stamping at every turn is different, cold stamping once afterwards is gone on again behind cold stamping forming once before and after changing the mould, and cold stamping forming once afterwards compares in cold stamping forming once before, middle neck becomes high, the diameter diminishes, middle shoulder widen. Through the mode, the bulge of the first blank die can gradually form the preset neck, the possibility that the neck wall is pulled to be cracked when the preset neck is formed can be further reduced, meanwhile, through cold stamping control at least twice in the front and at the back, metal drawing deformation can be better controlled, and the wall thickness reduction tolerance of the preset neck can be better controlled.
Preferably, the step S2 includes the steps of:
s21, cold stamping the boss portion, so that the blank mold forms a first intermediate blank mold with a first intermediate neck portion and a first intermediate shoulder portion, the diameter of the first intermediate neck portion is 300mm, and the height of the first intermediate neck portion is 50-55 mm;
s22, cold stamping the first intermediate neck portion so that the first intermediate blank mold forms a second intermediate blank mold having a second intermediate neck portion and a second intermediate shoulder portion, the second intermediate neck portion having a diameter of 245mm and the second intermediate neck portion having a height of 70-75 mm;
s23, cold stamping the second intermediate neck portion to form a third intermediate blank mold having a third intermediate neck portion and a third intermediate shoulder portion, the third intermediate neck portion having a diameter of 190mm and the third intermediate neck portion having a height of 85-90 mm;
and S24, performing cold stamping on the third intermediate neck part, so that the third intermediate blank die forms the preset blank die.
When the bulge is subjected to four times of cold stamping to form the preset blank die and the diameter and the height of the neck of the middle blank die are controlled to be the sizes, the forming quality of the preset neck is better, and the forming quality of the flange surface is better improved.
Preferably, the method further comprises a second step, wherein the second step comprises:
s3, trimming the upper end and the lower end of the preset blank die to enable the preset blank die to form a blank die II with a first neck part and a first cylindrical part;
s4, processing the inclined part of the upper end enclosure of the blank die II in a cold stamping mode to form the shoulder and the bottom of the upper end enclosure;
s5, performing flange surface flanging processing on the upper end of the first neck in a cold stamping mode to enable the first neck to form a formed flange surface and a neck of the upper end enclosure;
and S6, processing the outer circular surface of the molding flange surface to obtain the upper end enclosure.
When the tapered portion of the upper head is machined, although the preset shoulder portion is cold-pressed, the joint between the preset shoulder portion and the first cylindrical portion may be subjected to tensile deformation. After the inclined part is machined, the shoulder part and the bottom part of the upper end enclosure are simultaneously formed. After flange face turn-ups processing forms the shaping flange face, it is better in prior art because of the shaping quality of first neck is compared for need not to carry out whole processing to the structure that S5 finally obtained, only need process through the outer disc to the shaping flange face, can obtain the upper cover that accords with the regulation, the processing degree of difficulty is littleer, convenient and fast more. The upper end enclosure forming mode can simply, quickly, orderly and high-quality process and form the preset blank mold into the upper end enclosure meeting the specification.
Preferably, in the step S5, the upper end of the first neck portion is turned over to form an intermediate flange surface forming an angle of 45 ° with the neck portion, and then the intermediate flange surface is turned over to form the forming flange surface.
The forming flange face is formed by turning over the upper end of the first neck, and is the most serious part of the whole upper end enclosure in thinning, wherein the drawing deformation of the edge part of the forming flange face is the largest, in the scheme, the wall thickness thinning of the first neck is reduced by a blank die-forming preset blank die with a bulge part at the upper part, in order to further prevent the wall thickness thinning out over-tolerance of the forming flange face, the forming of the forming flange face is carried out in two steps, firstly, the forming flange face is turned over to form an inclined edge of about 45 degrees, and after natural aging for a certain time, the forming flange face is turned over and formed, and the forming quality is the best.
Preferably, the processing of each cold stamping adopts uniform stamping, and the stamping speed is less than or equal to 5mm/s, so that the phenomenon that the instantaneous stamping force is overlarge can be avoided, and the possibility that the steel plate is fractured in the process of forming the upper end enclosure is reduced. The steel plate is cold-stamped at the speed to form the upper end enclosure, so that the structure of the upper end enclosure can be gradually formed, and the forming effect is better.
Preferably, the preset shoulder comprises an arc-shaped part and a plane part, the plane part is connected between the arc-shaped part and the preset neck, and the curvature radius of the arc-shaped part is 30-50 mm;
in step S4, the arc portion is cold-stamped to form the slope portion.
In the step S4, compared with the step of cold-stamping the right-angled portion of the preset shoulder portion to form the oblique portion, the step of cold-stamping the arc-shaped portion of the preset shoulder portion to form the oblique portion has a radius of curvature of 30-50mm, and the shape and size of the arc-shaped portion are both more adaptive to the oblique portion of the upper head.
Preferably, the thickness of the steel plate is 7-7.5 mm.
The thickness of the steel plate required by the upper end enclosure formed by the prior art is 8.5-10mm, and a thinner steel plate cannot be adopted due to the problem of larger metal deformation and thinning. By the method, the upper end enclosure with the composite specification can be formed by adopting the steel plate with the thickness of 7-7.5mm, and the thickness of the steel plate is thinner than that of the steel plate required in the prior art, so that the material utilization rate is higher.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the manufacturing method of the upper end enclosure of the high-level radioactive waste liquid glass solidification container comprises the step of forming a preset blank mold with a preset neck, wherein a steel plate is subjected to cold stamping to form the blank mold I with the lower cylindrical part and the upper convex part, and the convex part can provide larger volume participating in deformation for the forming of the preset blank mold compared with the existing closed horizontal plane under the steel plate with the same thickness, so that when the preset neck is formed through the convex part, the metal drawing deformation is small, and the possibility of local drawing crack or wall thickness reduction tolerance can be reduced. And because the metal drawing deformation is small, the thickness of the steel plate used for forming is favorably reduced, so that the upper end enclosure can be formed by adopting the steel plate with relatively small thickness.
2. The dome-shaped bulge part is adopted, the shape of the bulge part is matched with the preset blank die, so that when the preset neck part is formed by cold stamping the bulge part, the metal drawing deformation is more uniform, and the more uniform forming thickness of the preset blank die is facilitated. And the mould required by cold stamping to form the dome-shaped bulge is convenient for processing. Except that, adopt the dome-shaped bellying of flat top, the flat top is corresponding to the top of predetermineeing the neck, is favorable to predetermineeing the atress shaping of neck, compares in the arc top, and it can also reduce subsequent cutting volume, reduces the waste volume of material, improves material utilization.
3. Earlier to bellying cold stamping, after forming middle neck, carry out cold stamping once at least again to middle neck, carry out cold stamping twice at least to the bellying and form and predetermine blank mould in other words, the size of the used mould of cold stamping at every turn is different, and the cold stamping of a back is gone on again after the cold stamping forming of a preceding time and change mould, and the cold stamping forming of a back compares in the cold stamping forming of a preceding time, and middle neck becomes highly, the diameter diminishes, the widen of middle shoulder. Through the mode, the bulge of the first blank die can gradually form the preset neck, the possibility that the neck wall is pulled to be cracked when the preset neck is formed can be further reduced, meanwhile, through cold stamping control at least twice in the front and at the back, metal drawing deformation can be better controlled, and the wall thickness reduction tolerance of the preset neck can be better controlled.
4. The molding of the molding flange surface is carried out in two steps, firstly, the molding flange surface is turned over to form a bevel edge with an angle of about 45 degrees, and then the molding flange surface is formed by turning over and bending after natural aging for a certain time, so that the possibility of the wall thickness reduction of the molding flange surface is reduced, the molding quality is best,
5. after the forming flange surface is formed, the upper end enclosure which meets the specification can be obtained only by processing the outer circular surface of the forming flange surface, and the processing difficulty is smaller, and the method is more convenient and faster.
Drawings
FIG. 1 is a schematic structural diagram of an upper end enclosure of a high-level radioactive waste liquid glass curing container;
fig. 2 shows a conventional capping process.
The icons in FIGS. 1-2: 1, sealing an end socket; 11-bottom; 12-shoulder; 121-bevel; 122-a horizontal portion; 13-neck portion; 14-flange face; 2-a blank mold to be stretched; 21-a cylindrical portion; 22-closed horizontal plane; 3-presetting a blank mold; 31-preset cylindrical section; 32-presetting a shoulder; 33-presetting a neck.
FIG. 3 is a schematic view showing the formation of a first blank mold in example 1;
FIG. 4 is a schematic structural view of a first blank mold in example 1;
FIG. 5 is a schematic view showing the formation of a first intermediate blank mold in example 1;
FIG. 6 is a schematic view of the structure of a first intermediate blank mold in example 1;
FIG. 7 is a schematic view showing the structure of a second intermediate blank mold in example 1;
FIG. 8 is a schematic view of the structure of a third intermediate blank mold in example 1;
FIG. 9 is a schematic view showing the structure of a preliminary blank mold in example 1;
fig. 10 is a schematic view of the trimming process in S3 in example 1;
FIG. 11 is a schematic view showing the structure of a blank mold II in example 1;
FIG. 12 is a schematic view showing the structure of a blank mold III in example 1;
fig. 13 is a schematic view of the intermediate flange face in S5 in embodiment 1;
FIG. 14 is a schematic view showing the structure of a blank mold IV in example 1;
fig. 15 is a schematic structural view of the final forming head.
The icons in FIGS. 3-15: 1, sealing an end socket; 11-bottom; 12-shoulder; 121-bevel; 122-a horizontal portion; 13-neck portion; 14-flange face; 2-blank molding one; 21-a cylindrical portion; 23-a dome-shaped structure; 3-presetting a blank mold; 31-preset cylindrical section; 32-presetting a shoulder; 33-presetting a neck; 41-a first intermediate blank mold; 412-a first intermediate shoulder; 413-a first intermediate neck; 42-a second intermediate blank mold; 422-a second intermediate shoulder; 423-a second intermediate neck; 43-a third intermediate blank mold; 432-a third intermediate shoulder; 433-a third intermediate neck; 5-blank mold II; 51-a first cylindrical section; 53-first neck; 6-blank mold III; 7-blank mold four; 74-forming the flange face; 741-intermediate flange face; 81-a first upper die; 82-a first lower die; 91-a second upper die; 92-second lower die.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The present embodiment provides a method for manufacturing an upper head of a high level radioactive liquid waste glass solidification container, as shown in fig. 3-15, comprising a first step of forming a predetermined blank mold 3 having a predetermined neck 33, the first step comprising:
s1, forming a blank die I2 by cold stamping the steel plate, wherein the lower part of the blank die I2 is a cylindrical part 21, and the upper part of the blank die I2 is a convex part;
s2, cold stamping the convex part of the blank mold I2 to enable the blank mold I2 to form the preset blank mold 3 with the preset shoulder part 32 and the preset neck part 33, wherein the height of the preset neck part 33 is larger than the height of the highest part of the convex part, the height of the preset neck part 33 is 105-108mm, and the outer diameter of the preset neck part 33 is 149.5-150.3 mm.
In the scheme, after the preset blank die 3 with the preset neck 33 is formed on the steel plate in a cold stamping mode, the steps of processing and trimming the upper end face and the lower end face of the preset blank die 3, forming the inclined part 121 of the upper end enclosure 1 and forming the flange face 14 of the upper end enclosure 1 on the preset shoulder 32 and the like can be carried out according to the prior art, so that the upper end enclosure 1 meeting the specification can be obtained. In this scheme, cold stamping technique is prior art, and it is spacing through last bed die, extrudees material or base mould, can the shaping with the base mould of last bed die looks adaptation. Except that the preset blank mold 3 sequentially comprises the preset neck part 33, the preset shoulder part 32 and the preset cylindrical part 31 from top to bottom, the preset cylindrical part 31 of the preset blank mold 3 can be completely the same as the cylindrical part 21 of the blank mold I2 in shape and size, and because the cold stamping is not applied to the cylindrical part 21 when the preset blank mold 3 is obtained by cold stamping the bulge part of the blank mold I2, both the preset neck part 33 and the preset shoulder part 32 can be completely formed by deforming the bulge part; however, when the protrusion is cold-stamped, the connection between the protrusion and the cylindrical portion 21 may be slightly deformed, so that the connection between the upper end of the cylindrical portion 21 and the protrusion is deformed, and the deformation of the lower end of the protrusion forms the preset shoulder portion 32, i.e., the preset cylindrical portion 31 may have a height smaller than that of the cylindrical portion 21. The predetermined shoulder 32 may be a right angle portion, such as the predetermined shoulder 32 in the prior art, i.e., the vertical section is a right angle; the preset shoulder 32 may also include an arc portion and a flat portion, as shown in fig. 9, the arc portion is connected to the flat portion, the flat portion is connected to the preset neck 33, and the arc portion is connected to the preset cylindrical portion 31.
In the scheme, in the step one of forming the preset blank die 3 with the preset neck part 33, a steel plate is subjected to cold stamping to form the blank die 2 with the lower part being the cylindrical part 21 and the upper part being the convex part, the total volume of the convex part should be greater than or equal to the sum of the volume of the inclined part 121 of the upper end enclosure 1, the volume of the part above the inclined part 121 and the volume of the upper end of the subsequent preset neck part 33 which is cut off, so as to ensure that each part of the upper end enclosure 1 can be formed, the volume of the cylindrical part 21 should be greater than the sum of the volume of the bottom 11 of the upper end enclosure 1 and the volume of the lower end of the preset blank die 3 which is cut off, and the outer diameter of the cylindrical part 21 is 432 mm. Compared with the existing closed horizontal plane, the bulge part can provide larger volume participating in deformation for the forming of the preset blank die 3 under the condition of the steel plate with the same thickness, so that when the preset neck part 33 is formed through the bulge part, the metal drawing deformation is small, and the possibility of local tensile fracture or wall thickness reduction out-of-tolerance can be reduced. And because the metal drawing deformation is small, the thickness of the steel plate used for forming is favorably reduced, so that the upper end enclosure 1 can be formed by adopting the steel plate with relatively small thickness. In the scheme, the first blank die 2 is formed by adopting a steel plate with the thickness of 7-7.5mm, and compared with a steel plate adopted by a conventional method, the steel plate has smaller thickness and higher material utilization rate.
In this embodiment, the first upper die 81 has an inner concave surface adapted to the upper surface of the blank die 2, the first lower die 82 has an outer convex surface adapted to the lower surface of the blank die 2, the inner concave surface of the first upper die 81 and the outer concave surface of the first lower die 82 are aligned vertically, the steel plate is adapted to the top surface of the first lower die 82, and the punching machine is operated to cold punch the steel plate to form the blank die 2. As a preferred embodiment, as shown in fig. 3-4, the lower portion of the blank mold one 2 is a cylindrical portion 21, the upper portion of the blank mold one 2 is a raised portion, the raised portion is a dome-shaped structure 23, and the top of the dome-shaped structure 23 is flat-topped.
The dome-shaped protruding portion is adopted, the shape of the protruding portion is matched with that of the preset blank die 3, so that when the preset neck 33 is formed by cold stamping the protruding portion, metal drawing deformation is more uniform, and the preset blank die 3 with more uniform forming thickness is formed. And the first upper die 81 and the first lower die 82 required for cold press forming the dome-shaped convex portion facilitate the processing. Besides, a flat-topped dome-shaped convex part is adopted, namely the top of the first lower die 82 is a plane, so that a steel plate can be placed conveniently, and cold stamping is facilitated; and the flat top is corresponding to the top of presetting neck 33, is favorable to presetting the atress shaping of neck 33, compares in the arc top, and it can also reduce subsequent cutting volume, reduces the waste volume of material, improves material utilization. Preferably, the radius of curvature of the arc portion of the dome-shaped structure 23 is 250-300mm, and the diameter of the flat top is 170-180 mm. By adopting the dome-shaped bulge part with the size, the shape and the size of the bulge part are matched with the preset blank die 3, so that when the preset neck part 33 is formed by cold stamping the bulge part, the metal drawing deformation is more uniform, and the more uniform forming thickness of the preset blank die 3 is facilitated.
After the blank die 2 is formed, the protruding portion of the blank die 2 needs to be subjected to cold stamping to obtain the preset blank die 3, in this embodiment, the protruding portion of the blank die 2 can be subjected to one-step stamping forming to form the preset blank die 3, so that the operation is simpler, and the number of processes is less. But in order to improve the forming quality of the preset blank mold 3, the upper end socket 1 meeting the regulation for subsequent forming is convenient and fast, and the more excellent mode is as follows: the step S2 includes the steps of: firstly, cold stamping the convex part of the blank die I2 to enable the blank die I2 to form an intermediate blank die with an intermediate neck part and an intermediate shoulder part; the blank die I2 further comprises a preset cylindrical part 31, namely the preset cylindrical part 31 of the preset blank die 3 is formed by performing cold stamping on the convex part for the first time;
and then, performing cold stamping on the intermediate neck at least once, wherein the subsequent cold stamping on the intermediate neck does not influence the preset cylindrical part 31, so that the diameter of the intermediate neck of the intermediate blank die is gradually reduced, the height of the intermediate neck is gradually increased, the width of the intermediate shoulder is gradually increased, and finally the intermediate blank die forms the preset blank die 3.
Earlier to bellying cold stamping, behind the neck in the middle of the formation, carry out cold stamping once at least to middle neck again, be equivalent to adopting promptly and carry out cold stamping twice at least to the bellying, make blank mould 2 form and predetermine blank mould 3, the size of the used mould of cold stamping is different at every turn, cold stamping is gone on again after the former cold stamping forming and change mould again after the latter, and cold stamping forming once afterwards compares in former cold stamping forming once, middle neck becomes highly, the diameter diminishes, middle shoulder widen. By the mode, the preset neck 33 can be formed by the convex part of the blank die I2 step by step, the possibility of neck wall tension cracking during the formation of the preset neck 33 can be further reduced, meanwhile, through cold stamping control at least twice before and after, metal drawing deformation can be better controlled, and the wall thickness reduction over-tolerance of the preset neck 33 can be better controlled.
In this embodiment, in step S2, the preset blank mold 3 is formed by selectively subjecting the protruding portion to cold stamping for 4 times. The method comprises the following specific steps: the step S2 includes the steps of:
s21, cold stamping the boss portion, so that the blank die one 2 forms a first intermediate blank die 41 with a first intermediate neck portion 413 and a first intermediate shoulder portion 412, the diameter of the first intermediate neck portion 413 is 300mm, and the height of the first intermediate neck portion 413 is 50-55 mm; specifically, as shown in fig. 5 to 6, the mold comprises a second upper mold 91 and a second lower mold 92, wherein the second upper mold 91 has a lower concave surface adapted to the outer surface of the first intermediate shoulder 412 and the first intermediate neck 413, and the second lower mold 92 has an upper convex surface adapted to the inner surface of the first intermediate shoulder 412; placing the second lower die 92 flat and fitting the boss portion correspondingly above the second lower die 92, then placing the second upper die 91 above the boss portion, and cold-stamping the boss portion, so that the blank die one 2 forms a first intermediate blank die 41 having a first intermediate neck portion 413 and a first intermediate shoulder portion 412, the first intermediate blank die 41 including the first intermediate neck portion 413, the first intermediate shoulder portion 412 and the preset cylindrical portion 31 from top to bottom, the first intermediate shoulder portion 412 including an arc portion and a flat portion;
s22, cold-stamping the first intermediate neck portion 413 so that the first intermediate blank mold 41 forms a second intermediate blank mold 42 having a second intermediate neck portion 423 and a second intermediate shoulder portion 422, as shown in fig. 7, the second intermediate blank mold 42 includes, from top to bottom, the second intermediate neck portion 423, the second intermediate shoulder portion 422 and the predetermined cylindrical portion 31, the diameter of the second intermediate neck portion 423 is 245mm, and the height of the second intermediate neck portion 423 is 70 to 75 mm; wherein the second intermediate shoulder 422 also includes an arc portion and a flat portion, and the size of the flat portion of the second intermediate shoulder 422 is larger than the size of the flat portion of the first intermediate shoulder 412, and the shape and size of the arc portions of the second intermediate shoulder 422 and the first intermediate shoulder 412 are the same;
s23, cold-stamping the second intermediate neck portion 423, so that the second intermediate blank die 42 forms a third intermediate blank die 43 having a third intermediate neck portion 433 and a third intermediate shoulder portion 432, as shown in fig. 8, the third intermediate blank die 43 includes, from top to bottom, the third intermediate neck portion 433, a third intermediate shoulder portion 432 and the preset cylindrical portion 31, the diameter of the third intermediate neck portion 433 is 190mm, the height of the third intermediate neck portion 433 is 85-90mm, the third intermediate shoulder portion 432 also includes an arc portion and a flat portion, the size of the flat portion of the third intermediate shoulder portion 432 is larger than that of the flat portion of the second intermediate shoulder portion 422, and the shapes and sizes of the arc portions of the third intermediate shoulder portion 432 and the second intermediate shoulder portion 422 are the same;
s24, cold stamping the third intermediate neck portion 433, so that the third intermediate blank mold 43 forms the pre-set blank mold 3. The preset shoulder portion 32 includes an arc portion and a flat portion, the flat portion is connected between the arc portion and the preset neck portion 33, and the arc portion is connected between the flat portion and the preset cylindrical portion 31; the size of the plane part of the preset shoulder part 32 of the preset blank mold 3 is larger than that of the plane part of the third middle shoulder part 432, the shape and the size of the arc part of the preset shoulder part 32 of the preset blank mold 3 are the same as those of the arc part of the third middle shoulder part 432, and the curvature radius of the arc part of the preset shoulder part 32 is 30-50 mm.
After the preset blank die 3 is formed, a second step of forming the upper end enclosure 1 is further included, wherein the second step includes:
s3, as shown in fig. 10 to 11, trimming the upper and lower ends of the preliminary blank mold 3 so that the preliminary blank mold 3 forms a second blank mold 5 having a first neck portion 53 and a first cylindrical portion 51; the blank mold II 5 sequentially comprises a first neck part 53, the preset shoulder part 32 and a first cylindrical part 51 from top to bottom, and the outer diameter of the first cylindrical part 51 is 432 mm;
s4, processing the oblique portion 121 of the upper head 1 on the blank mold two 5 by cold stamping to form the shoulder 12 and the bottom 11 of the upper head 1, that is: forming the blank mold three 6 from the blank mold two 5, wherein the blank mold three 6 comprises the first neck part 53, the shoulder part 12 and the bottom part 11 from top to bottom in sequence as shown in fig. 12; in step S4, compared with the step of cold-stamping the right-angled portion of the preset shoulder 32 to form the inclined portion 121, the step of cold-stamping the arc-shaped portion of the preset shoulder 32 to form the inclined portion 121, wherein the radius of curvature of the arc-shaped portion of the preset shoulder 32 is 30-50mm, the shape and size of the arc-shaped portion of the preset shoulder 32 are both more suitable for the inclined portion 121 of the upper head 1, and during cold stamping, metal drawing deformation is smaller and more uniform, and the quality of the formed inclined portion 121 is better. In addition, when the inclined portion 121 of the upper head 1 is machined, although the preset shoulder portion 32 is cold-pressed, the joint between the preset shoulder portion 32 and the first cylindrical portion 51 may be subjected to tensile deformation. After the inclined part 121 is machined, simultaneously molding a shoulder part 12 and a bottom part 11 of the upper sealing head 1, wherein the shoulder part 12 of the upper sealing head 1 comprises a horizontal part 122 and the inclined part 121, and the outer diameter of the bottom part 11 is 430 mm;
s5, flanging the upper end of the first neck 53 by a flange surface 14 in a cold stamping manner, so that the first neck 53 forms a formed flange surface 74 and a neck 13 of the upper head 1; namely: forming a blank mold four 7 by the blank mold three 6, wherein as shown in fig. 14, the blank mold four 7 sequentially comprises a forming flange surface 74, a neck part 13 of the upper sealing head 1, a shoulder part 12 of the upper sealing head 1 and a bottom part 11 of the upper sealing head 1 from top to bottom;
s6, processing the outer circular surface of the formed flange surface 74 to obtain the upper sealing head 1, as shown in fig. 15, the upper sealing head 1 sequentially includes, from top to bottom, a flange surface 14, a neck portion 13, a shoulder portion 12, and a bottom portion 11, and the shoulder portion 12 includes an inclined portion 121 connected to the bottom portion 11 and a horizontal portion 122 connected to the neck portion 13. The bottom part 11 is cylindrical, the outer diameter of the bottom part is 430mm, and the thickness of the bottom part is 5.5-6.5 mm; the neck part 13 is cylindrical, the outer diameter is 149.5-150.3mm, the wall thickness is 5.5-6.5mm, the upper end and the lower end of the neck part 13 are provided with outward arc-shaped guide angles, and the radius of the guide angles is 10 mm; the wall thickness of the flange surface 14 is 4.7-5.3mm, and the radius of the outer circular surface is 110 mm; the shoulder 12 has a thickness of 5.5-6.5 mm.
After the flange face 14 is turned over and processed to obtain the forming flange face 74, the forming quality of the first neck 53 is better than that of the prior art, so that the structure finally obtained by S5 is not required to be integrally processed, the upper end enclosure 1 meeting the specification can be obtained only by processing the outer circular surface of the forming flange face 74, and the processing difficulty is lower, and the method is more convenient and rapid. The forming mode of the upper end enclosure 1 can simply, quickly and orderly process and form the preset blank mold 3 into the upper end enclosure 1 meeting the specification in high quality.
Preferably, as shown in fig. 13 to 14, in the step S5, the upper end of the first neck portion 53 is first folded to form an intermediate flange surface 741 forming an angle of 45 ° with the neck portion 13, and then the intermediate flange surface 741 is folded to form the forming flange surface 74.
The forming flange face 74 is formed by turning over the upper end of the first neck 53, the forming flange face is the most seriously thinned part of the whole upper end enclosure 1, the drawing deformation of the edge part of the forming flange face 74 is the largest, in the scheme, the wall thickness thinning of the first neck 53 is reduced by forming the preset blank die 3 through the blank die I2 with the upper part being the bulge, in order to further prevent the wall thickness thinning out of the forming flange face 74 from being out of tolerance, the forming of the forming flange face 74 is carried out in two steps, firstly, the forming flange face is turned over to form a bevel edge of about 45 degrees, and after natural aging for a certain time, the forming flange face 74 is formed by turning over and forming, and the forming quality is the best.
Besides, in the scheme, the processing of cold stamping at every time adopts uniform stamping, the stamping speed is less than or equal to 5mm/s, the excessive instantaneous stamping force can be avoided, and the possibility that the steel plate is fractured in the process of forming the upper end enclosure 1 is reduced. The steel plate is cold-stamped at the speed to form the upper end enclosure 1, so that the structure of the upper end enclosure 1 can be gradually formed, and the forming effect is better. In the scheme, all the blank molds are revolved bodies except the protruding part on the upper part of the blank mold I2 can be of an irregular structure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The manufacturing method of the upper end socket of the high-level radioactive waste liquid glass curing container is characterized by comprising a first step of forming a preset blank mold (3) with a preset neck (33), wherein the first step comprises the following steps:
s1, forming a first blank die (2) by cold stamping the steel plate, wherein the lower part of the first blank die (2) is a cylindrical part (21), and the upper part of the first blank die (2) is a convex part;
s2, cold stamping the convex part of the blank die I (2) to enable the blank die I (2) to form the preset blank die (3) with a preset shoulder part (32) and a preset neck part (33), wherein the height of the preset neck part (33) is larger than that of the highest part of the convex part, the height of the preset neck part (33) is 105-108mm, and the outer diameter of the preset neck part (33) is 149.5-150.3 mm.
2. A method for manufacturing an upper head of a high level liquid waste glass solidification container according to claim 1, wherein the protrusion is a dome-shaped structure (23), and the top of the dome-shaped structure (23) is flat-topped.
3. The method for manufacturing an upper end enclosure of a high-level waste liquid glass curing container as claimed in claim 2, wherein the radius of curvature of the arc portion of the dome-shaped structure (23) is 250 mm and 300mm, and the diameter of the flat top is 170 mm and 180 mm.
4. The method for manufacturing an upper head of a high level waste liquid glass curing container according to claim 1, wherein the step S2 comprises the following steps:
firstly, cold stamping the convex part of the blank die I (2) to enable the blank die I (2) to form an intermediate blank die with an intermediate neck part and an intermediate shoulder part;
and then, carrying out cold stamping on the intermediate neck part for at least one time, so that the diameter of the intermediate neck part of the intermediate blank die is gradually reduced, the height of the intermediate neck part is gradually increased, and the width of the intermediate shoulder part is gradually increased, and finally the intermediate blank die forms the preset blank die (3).
5. The method for manufacturing an upper head of a high level waste liquid glass curing container according to claim 4, wherein the step S2 comprises the following steps:
s21, cold stamping the boss to form the first blank mold (2) into a first intermediate blank mold (41) having a first intermediate neck portion (413) and a first intermediate shoulder portion (412), the first intermediate neck portion (413) having a diameter of 300mm, the first intermediate neck portion (413) having a height of 50-55 mm;
s22, cold stamping the first intermediate neck (413) to form the first intermediate blank mold (41) into a second intermediate blank mold (42) having a second intermediate neck (423) and a second intermediate shoulder (422), the second intermediate neck (423) having a diameter of 245mm and the second intermediate neck (423) having a height of 70-75 mm;
s23, cold stamping the second intermediate neck part (423) to form a third intermediate blank die (43) with a third intermediate neck part (433) and a third intermediate shoulder part (432) by the second intermediate blank die (42), wherein the diameter of the third intermediate neck part (433) is 190mm, and the height of the third intermediate neck part (433) is 85-90 mm;
and S24, performing cold stamping on the third intermediate neck part (433) to enable the third intermediate blank die (43) to form the preset blank die (3).
6. The manufacturing method of the upper head of the high level waste liquid glass curing container according to any one of claims 1 to 5, further comprising a second step, wherein the second step comprises:
s3, trimming the upper end and the lower end of the preset blank die (3) to form a blank die II (5) with a first neck part (53) and a first cylindrical part (51) on the preset blank die (3);
s4, processing the inclined part (121) of the upper end enclosure (1) of the blank die II (5) in a cold stamping mode to form a shoulder part (12) and a bottom part (11) of the upper end enclosure (1);
s5, performing flange flanging on the upper end of the first neck (53) in a cold stamping mode to enable the first neck (53) to form a formed flange (74) and the neck (13) of the upper sealing head (1);
s6, processing the outer circular surface of the molding flange surface (74) to obtain the upper end enclosure (1).
7. The method for manufacturing an upper end enclosure of a high level waste liquid glass curing container according to claim 6, wherein in the step S5, the upper end of the first neck portion (53) is first folded to form an intermediate flange surface (741) forming an angle of 45 ° with the neck portion (13), and then the intermediate flange surface (741) is folded to form the forming flange surface (74).
8. The manufacturing method of the upper head of the high level radioactive liquid waste glass solidification container according to claim 6, wherein the cold stamping is performed at a constant speed, and the stamping speed is less than or equal to 5 mm/s.
9. A manufacturing method of an upper head of a high level waste liquid glass solidification container according to claim 6, wherein the preset shoulder portion (32) comprises an arc-shaped portion and a plane portion, the plane portion is connected between the arc-shaped portion and the preset neck portion (33), and the radius of curvature of the arc-shaped portion is 30-50 mm;
in step S4, the arc-shaped portion is cold-stamped to form the slope portion (121).
10. The method for manufacturing the upper head of the high-level radioactive liquid waste glass curing container according to any one of claims 1 to 5, wherein the thickness of the steel plate is 7 to 7.5 mm.
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| CN202111103826.7A CN113770244A (en) | 2021-09-18 | 2021-09-18 | Manufacturing method of upper end enclosure of high-level radioactive waste liquid glass curing container |
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| CN202111103826.7A CN113770244A (en) | 2021-09-18 | 2021-09-18 | Manufacturing method of upper end enclosure of high-level radioactive waste liquid glass curing container |
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