CN101905405A - Welding mould and method for processing high-accuracy square zirconium alloy element box - Google Patents
Welding mould and method for processing high-accuracy square zirconium alloy element box Download PDFInfo
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- CN101905405A CN101905405A CN 201010230946 CN201010230946A CN101905405A CN 101905405 A CN101905405 A CN 101905405A CN 201010230946 CN201010230946 CN 201010230946 CN 201010230946 A CN201010230946 A CN 201010230946A CN 101905405 A CN101905405 A CN 101905405A
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- 229910001093 Zr alloy Inorganic materials 0.000 title claims abstract description 53
- 238000012545 processing Methods 0.000 title claims abstract description 9
- 238000003466 welding Methods 0.000 title abstract description 17
- 238000000034 method Methods 0.000 title description 22
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 197
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 197
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 238000003825 pressing Methods 0.000 claims abstract description 25
- 238000005452 bending Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000004381 surface treatment Methods 0.000 claims abstract description 9
- 238000003672 processing method Methods 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 24
- 230000000399 orthopedic effect Effects 0.000 claims description 23
- 238000010276 construction Methods 0.000 claims description 22
- 238000003801 milling Methods 0.000 claims description 18
- 238000005554 pickling Methods 0.000 claims description 18
- 210000004907 gland Anatomy 0.000 claims description 16
- 238000012856 packing Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 6
- 238000010894 electron beam technology Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000010923 batch production Methods 0.000 abstract 1
- 210000001503 joint Anatomy 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000003754 machining Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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Abstract
The invention discloses a welding mould. A zirconium box pressing structure is arranged outside a zirconium box supporting structure; U-shaped zirconium grooves to be welded are arranged between the zirconium box pressing structure and the zirconium box supporting structure; positioning mechanisms are arranged on both end surfaces of the zirconium box pressing structure; zirconium box surface protection devices are arranged between the U-shaped zirconium grooves and the zirconium box pressing structure; and mould assembling and disassembling mechanisms are arranged on both end surfaces of the zirconium box pressing structure and the zirconium box supporting structure. The invention also discloses a processing method of a high-accuracy square zirconium alloy element box, comprising the following processing steps of: selecting a zirconium plate, and rechecking property; blanking the zirconium plate; bending for forming; welding and carrying out vacuum heat treatment shape correction by utilizing the welding mould; and carrying out surface treatment. The invention butts rabbets of the two U-shaped zirconium grooves by adopting the purpose-made welding mould, thereby assembling the square zirconium alloy element box; and in addition, the manufactured square zirconium alloy element box has high accuracy, short processing time and suitability for large batch production.
Description
Technical field
The invention belongs to the Machining Technology field, relate to a kind of weld mold, the invention still further relates to the method that adopts this weld mold processing high-accuracy square zirconium alloy element box.
Background technology
Do not pollute the loop for the fission product of guaranteeing fuel rod does not overflow in the nuclear reaction running, it must be isolated and wrap up, zirconium alloy element box is exactly a kind of " container " that is used for wrapping up fuel rod.Zirconium alloy element box is called for short by " zirconium box " or " subassembly wrapper ", is the critical piece in cryogenic nucleus heating reaction heap (NHR) and the boiling-water reactor (BWR), and it is made by the Zr-4 sheet alloy.Zirconium box inboard is the cluster fuel assembly, and four zirconium boxes arrange that in heap constituting the Kuan Shui crack is the passage of cross wing control rod.In order to guarantee that the cluster fuel assembly successfully inserts the zirconium box and cross wing control rod can move up and down freely under the various operating modes of reactor in the full phase in longevity, therefore quality and the machining accuracy to subassembly wrapper proposed very high requirement.The machining accuracy of zirconium box comprises the form tolerance (flatness) and position of related features (depth of parallelism or perpendicularity) on the dimensional tolerance in inside and outside cross section, four planes, machining accuracy must be very high, and must guarantee four jiaos bending radius especially the outer surface fillet should meet design requirement.
The main technological route of China's nuclear power station was presurized water reactor (PWR) in the past, did not use zirconium alloy element box.The 5MW cryogenic nucleus heating reaction heap (NHR-5) that Tsing-Hua University's nuclear energy and new energy technology design and research institute succeeded in developing in 1989 is the reactor that China uses square zirconium box first.Its zirconium box processing technology step is: 1. the perimeter of section that calculates square zirconium box is that blanking is also smooth with the four edges fine finishining of zirconium plate, guarantees the perpendicularity between vertical edges simultaneously behind the required sheet material width; 2. weld after surrounding drum; 3. adopt the drawing mould of multi-pass, progressively drum is drawn into the zirconium box of square-section.Though this process route is domestic and international initiative, and machining accuracy has satisfied the instructions for use of 5MW low temperature heap, but have following shortcoming: the machining accuracy of zirconium box still has certain limitation, especially because the bigger and incomplete centering of pulling capacity, cause the whole torsional capacity and the reaping hook amount of bow (form tolerance) of zirconium box bigger, machining accuracy is not high; Used many covers drawing mould and special purpose machine tool, process time longer, caused cost higher, be not suitable for producing in enormous quantities.In addition, have some technology to relate to the processing method of zirconium alloy element box abroad, these technology are all taked behind the sizing sheet material bending and molding, and laser or plasma are welded into square zirconium box again.But from these technology, do not mention the method for concrete bending and molding, the method for zirconium box precision not being improved yet.
Summary of the invention
The purpose of this invention is to provide a kind of weld mold, the square zirconium alloy element box precision height that processes.
Another object of the present invention is to adopt the method for this weld mold processing high-accuracy square zirconium alloy element box, and process time is short, is fit to produce in enormous quantities.
The technical solution adopted in the present invention is that a kind of weld mold is made up of zirconium box supporting construction, zirconium box compressing structure, detent mechanism and mould mounting mechanism; Zirconium box compressing structure is arranged on zirconium box supporting construction outside, and detent mechanism is arranged on the both ends of the surface of zirconium box compressing structure, and the mould mounting mechanism is arranged between the both ends of the surface and zirconium box supporting construction of zirconium box compressing structure;
Zirconium box supporting construction is: comprise the combined inner tube of being made up of last wedge-like quadrangular and following wedge-like quadrangular, last wedge-like quadrangular lower surface is last wedge-like quadrangular faying face, last wedge-like quadrangular faying face is provided with keyway, following wedge-like quadrangular upper surface is following wedge-like quadrangular faying face, following wedge-like quadrangular faying face is provided with key, and keyway and key are little matched in clearance; The end, two ends of combined inner tube is provided with locating shaft and following locating shaft, and last locating shaft is provided with on last wedge-like quadrangular, and following locating shaft is being provided with on the wedge-like quadrangular down; The upper and lower surface of combined inner tube is provided with rectangle elongated slot and following rectangle elongated slot;
Zirconium box compressing structure is: comprise cover tire, the upper and lower surface of cover tire is provided with slotted hole, also is provided with wide pressing plate and narrow pressing plate in the cover tire, and four sides of cover tire are provided with the housing screw and first packing ring;
The structure of detent mechanism is: comprise the end gland that the cover tire both ends are provided with, gland center, end is provided with locating hole, and the following locating shaft at the last locating shaft at last wedge-like quadrangular two ends, following wedge-like quadrangular two ends passes locating hole simultaneously and fixes;
The structure of mould mounting mechanism is: comprise first inner tube of a tyre installation screw rod, first inner tube of a tyre dismantling screw that are connected with last wedge-like quadrangular two ends, also comprise second inner tube of a tyre dismantling screw and second inner tube of a tyre installation screw rod that are connected with following wedge-like quadrangular two ends, first inner tube of a tyre is installed screw rod, first inner tube of a tyre dismantling screw, second inner tube of a tyre dismantling screw and second inner tube of a tyre installation screw rod and is passed circular hole on the gland of end respectively, and with combined inner tube thread connection separately; First inner tube of a tyre is installed on screw rod, first inner tube of a tyre dismantling screw, second inner tube of a tyre dismantling screw, second inner tube of a tyre installation screw rod and is respectively arranged with nut.
Another technical scheme of the present invention is, the method for processing high-accuracy square zirconium alloy element box is specifically implemented according to following steps:
Choosing thickness δ is 2.2mm-2.3mm, and the zirconium plate of roughness≤3.2 μ m adopts numerical controlled shearing machine blanking and finish-milling with the zirconium plate, and obtaining length is 1100 ± 1mm, and wide is zirconium plate behind two finish-millings of 268.5 ± 0.03mm; The four edges that guarantees the zirconium plate is smooth, and the perpendicularity deviation between adjacent edge is less than 0.3mm;
Get two zirconium plates behind step 1 finish-milling, adopt numerical control bender, two zirconium plates are bent into U type zirconium groove shape respectively, the jig precision is ± 0.01mm, and shaping speed 80mm/min-120mm/min, upper and lower mould gap 2.0mm-3.0mm, 50 tons-80 tons of load, dwell time 5-20 second, the radius of corner 6mm of Bending punch, springback capacity are 0.6 °-1 °;
Use a kind of weld mold in this step 3, form by zirconium box supporting construction, zirconium box compressing structure, detent mechanism and mould mounting mechanism; Zirconium box compressing structure is arranged on zirconium box supporting construction outside, and detent mechanism is arranged on the both ends of the surface of zirconium box compressing structure, and the mould mounting mechanism is arranged between the both ends of the surface and zirconium box supporting construction of zirconium box compressing structure;
Zirconium box supporting construction is: comprise the combined inner tube of being made up of last wedge-like quadrangular and following wedge-like quadrangular, last wedge-like quadrangular lower surface is last wedge-like quadrangular faying face, last wedge-like quadrangular faying face is provided with keyway, following wedge-like quadrangular upper surface is following wedge-like quadrangular faying face, following wedge-like quadrangular faying face is provided with key, and keyway and key are little matched in clearance; The end, two ends of combined inner tube is provided with locating shaft and following locating shaft, and last locating shaft is provided with on last wedge-like quadrangular, and following locating shaft is being provided with on the wedge-like quadrangular down; The upper and lower surface of combined inner tube is provided with rectangle elongated slot and following rectangle elongated slot;
Zirconium box compressing structure is: comprise cover tire, the upper and lower surface of cover tire is provided with slotted hole, also is provided with wide pressing plate and narrow pressing plate in the cover tire, and four sides of cover tire are provided with the housing screw and first packing ring;
The structure of detent mechanism is: comprise the end gland that the cover tire both ends are provided with, gland center, end is provided with locating hole, and the following locating shaft at the last locating shaft at last wedge-like quadrangular two ends, following wedge-like quadrangular two ends passes locating hole simultaneously and fixes;
The structure of mould mounting mechanism is: comprise first inner tube of a tyre installation screw rod, first inner tube of a tyre dismantling screw that are connected with last wedge-like quadrangular two ends, also comprise second inner tube of a tyre dismantling screw and second inner tube of a tyre installation screw rod that are connected with following wedge-like quadrangular two ends, first inner tube of a tyre is installed screw rod, first inner tube of a tyre dismantling screw, second inner tube of a tyre dismantling screw and second inner tube of a tyre installation screw rod and is passed circular hole on the gland of end respectively, and with combined inner tube thread connection separately; First inner tube of a tyre is installed on screw rod, first inner tube of a tyre dismantling screw, second inner tube of a tyre dismantling screw, second inner tube of a tyre installation screw rod and is respectively arranged with nut, utilizes above-mentioned weld mold, implements following operation,
Two U type zirconium grooves that step 2 is made dock notch, earlier two U type zirconium grooves are enclosed within the outer surface of weld mold combined inner tube, the commissure of two U type zirconium grooves is consistent with the opening part of two U type frame butt joints, adopt vacuum electron beam butt welded seam place to weld, the butt welded seam surfaces externally and internally is wipeed off, and the U type zirconium groove with one takes out at last;
It is orthopedic that the U type zirconium groove of the one that step 3 is obtained carries out vacuum heat, thereby size is carried out finishing:
U type zirconium groove with one is placed in the orthopedic mould earlier, more orthopedic mould is carried out vacuum heat, and heat treatment temperature is 600 ℃, and temperature retention time 2.5 hours, vacuum are 1.3 * 10
-3Pa; U type zirconium groove with one behind the air cooling takes out;
The U type zirconium groove of the one that step 4 is obtained carries out surface treatment and pickling, and the pickling time is 4-6 minute, rinses well with demineralized water after the pickling, dries up with high-purity compressed air, promptly.
The invention has the beneficial effects as follows, choosing the zirconium plate earlier detects its performance, zirconium plate blanking then, employing numerical control bender bending and molding, then adopt of the notch butt joint of special weld mold, be assembled into a square zirconium alloy element box, pass through vacuum heat at last two U type zirconium grooves, surface treatment, the square zirconium alloy element box precision height that manufacturing obtains, process time is short, is fit to produce in enormous quantities.
Description of drawings
Fig. 1 is the structural representation of the high-accuracy square zirconium alloy element box that makes of the present invention;
Fig. 2 is the right view of Fig. 1;
Fig. 3 is the structural representation of weld mold of the present invention;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is the left view of Fig. 3;
Fig. 6 is that the B-B of Fig. 3 is to view;
Fig. 7 is the structural representation of the orthopedic mould of heat treatment in the zirconium alloy element box process of the present invention.
Wherein, 1.U type zirconium groove is 2. gone up the wedge-like quadrangular, the 2a. keyway, 2b. the first party v notch v, the last wedge-like quadrangular of 2c. faying face, the last rectangle elongated slot of 2d., 2e. last locating shaft 3. descends the wedge-like quadrangular, the 3a. key, 3b. the second party v notch v, wedge-like quadrangular faying face under the 3c., rectangle elongated slot under the 3d., 3e. following locating shaft, 4. cover tire, 4a. weld seam, 4b. slotted hole, 4c. seam, 5. wide pressing plate, 6. narrow pressing plate, 7. housing screw, 8. first packing ring, 9. rubber blanket, 10. end gland, 11. first inner tubes of a tyre are installed screw rod, 12. first nut, 13. second packing rings, 14. second nuts, 15. first inner tube of a tyre dismantling screw, 16. second inner tube of a tyre dismantling screws, 17. the 3rd nuts, 18. the 3rd packing ring, 19. the 4th nuts, 20. second inner tubes of a tyre are installed screw rod, 21. square zirconium alloy element box, 22. jiaos of rods, 23. inner tubes of a tyre; L is the length of square zirconium alloy element box, and W is the outer surface length of side of square zirconium alloy element box, W
jBe the inner surface length of side of square zirconium alloy element box, δ is the thickness of square zirconium alloy element box, and r is the radius of four fillets of square zirconium alloy element box.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The work flow of high-accuracy square zirconium alloy element box of the present invention is: choose zirconium plate and performance and review, the blanking of zirconium plate, bending and molding, welding, vacuum heat, plurality of processes such as surface treatment.The processing method of high-accuracy square zirconium alloy element box specifically may further comprise the steps:
Choosing thickness δ is 2.2mm-2.3mm, the zirconium plate of roughness≤3.2 μ m, and the mechanical performance of zirconium plate satisfies the requirement in the table 1,
Table 1 zirconium plate property table
The zirconium plate obtained is adopted numerical controlled shearing machine blanking and finish-milling, and obtaining length is 1100 ± 1mm, and wide is zirconium plate behind two finish-millings of 268.5 ± 0.03mm; The four edges that guarantees the zirconium plate is smooth, and the perpendicularity deviation between adjacent edge is less than 0.3mm;
Get two zirconium plates behind step 1 finish-milling, adopt numerical control bender, two zirconium plates are bent into U type zirconium groove shape respectively, wherein the jig precision is ± 0.01mm, detailed process comprises along the vertical bending of sheet material, and shaping speed is that 80mm/min-120mm/min, upper and lower mould gap are that 2.0mm-3.0mm, load are that 50 tons-80 tons, dwell time are that 5-20 second, the radius of corner 6mm (radius of corner of Bending punch is with the fillet radius of the zirconium alloy element box that makes at last) of Bending punch, springback capacity are 0.6 °-1 °;
Two U type zirconium grooves that step 2 is made utilize the notch butt joint of welding tooling with two U type zirconium grooves, be assembled into a square zirconium alloy element box, the structure of square zirconium alloy element box as shown in Figure 1 and Figure 2, two U type zirconium groove 1 joints are as weld seam 4a, the square zirconium alloy element box 21 long L that make are 1100 ± 1mm, thickness δ is 2.2mm-2.3mm, and the outer surface length of side W of square zirconium alloy element box 21 is 140.3 ± 0.4mm, the inner surface length of side W of square zirconium alloy element box 21
jBe 135.9 ± 0.3mm, the radius r of 21 4 fillets of square zirconium alloy element box is 6mm.
In welding process, use weld mold, the structure of weld mold such as Fig. 3-shown in Figure 6, comprise zirconium box supporting construction, zirconium box compressing structure, detent mechanism, zirconium box surface protection device and mould mounting mechanism composition; Zirconium box compressing structure is arranged on zirconium box supporting construction outside, is provided with U type zirconium groove 1 to be welded between zirconium box compressing structure and the zirconium box supporting construction; Detent mechanism is arranged on the both ends of the surface of zirconium box compressing structure, and zirconium box surface protection device is between U type zirconium groove 1 and zirconium box compressing structure; The mould mounting mechanism is arranged on the both ends of the surface and zirconium box supporting construction of zirconium box compressing structure.
Specifically, zirconium box supporting construction comprises the combined inner tube of being made up of last wedge-like quadrangular 2 and following wedge-like quadrangular 3, last wedge-like quadrangular 2 lower surfaces are last wedge-like quadrangular faying face 2c, last wedge-like quadrangular faying face 2c is provided with keyway 2a, following wedge-like quadrangular 3 upper surfaces are following wedge-like quadrangular faying face 3c, following wedge-like quadrangular faying face 3c is provided with key 3a, and keyway 2a and key 3a are little matched in clearance; Be provided with two first party v notch v 2b and two second party v notch v 3b at combined inner tube four angles vertically, two first party v notch v 2b are provided with on last wedge-like quadrangular 2, two second party v notch v 3b are being provided with on the wedge-like quadrangular 3 down, and purpose is in order to avoid the fillet all around of U type zirconium groove 1; Be provided with locating shaft 2e, following locating shaft 3e in the end, two ends of combined inner tube, last locating shaft 2e is provided with on last wedge-like quadrangular 2, and following locating shaft 3e is being provided with on the wedge-like quadrangular 3 down; The upper and lower surface of combined inner tube is provided with rectangle elongated slot 2d and following rectangle elongated slot 3d, purpose be for the heat that produces when the welding can pass through on rectangle elongated slot 2d and following rectangle elongated slot 3d derive to the outside.
Zirconium box compressing structure is arranged on zirconium box supporting construction outside, and zirconium box compressing structure comprises cover tire 4, and the upper and lower surface of cover tire 4 is provided with slotted hole 4b, and slotted hole 4b is as the welding operation space, and slotted hole 4b is relative with the weld seam 4a position between two U type zirconium grooves; Vertically be provided with two wide pressing plates 5 about in the cover tire 4, respectively be arranged with two narrow pressing plates 6 in the cover tire 4 up and down in parallel, 4 four sides of cover tire are provided with the housing screw 7 and first packing ring 8, housing screw 7 imposed loads are in wide pressing plate 5 and narrow pressing plate 6, and the U type zirconium groove 1 will weld the time overlays tightly on combined inner tube, makes gap minimum, unfitness of butt joint minimum between soldered limit.
Detent mechanism is included in the end gland 10 that cover tire 4 both ends are provided with, and gland 10 centers in end are provided with locating hole, and the following locating shaft 3e at the last locating shaft 2e at last wedge-like quadrangular 2 two ends, following wedge-like quadrangular 3 two ends passes locating hole simultaneously and fixes; Two ends of cover tire 4 also are provided with seam 4c, thus make locating shaft 2e on end gland 10, cover tire 4 end seam 4c, end gland 10 locating holes and the combined inner tube, cooperate the axiality of 1 of common guarantee combined inner tube, cover tire 4 and U type zirconium groove between the locating shaft 3e down.
Zirconium box surface protection device is the rubber blanket 9 that is provided with between U type zirconium groove 1 and wide pressing plate 5, U type zirconium groove 1 and narrow pressing plate 6, plays a protective role.
The mould mounting mechanism comprises two pairs of screw rods, nut structure, its structure is specially: comprise first inner tube of a tyre installation screw rod 11, first inner tube of a tyre dismantling screw 15 that are connected with last wedge-like quadrangular 2 two ends, also comprise second inner tube of a tyre dismantling screw 16 and second inner tube of a tyre installation screw rod 20 that are connected with following wedge-like quadrangular 3 two ends, first inner tube of a tyre is installed screw rod 11, first inner tube of a tyre dismantling screw 15, second inner tube of a tyre dismantling screw 16, second inner tube of a tyre and screw rod 20 is installed is passed circular hole on the end gland 10 respectively, and passes through thread connection with combined inner tube separately; Install on the screw rod 20 and be respectively arranged with first nut 12, second nut 14, the 3rd nut 17, the 4th nut 19 at first inner tube of a tyre installation screw rod 11, first inner tube of a tyre dismantling screw 15, second inner tube of a tyre dismantling screw 16, second inner tube of a tyre, install on screw rod 11, second inner tube of a tyre installation screw rod 20 at first inner tube of a tyre and also be respectively arranged with second packing ring 13 and the 3rd packing ring 18; First inner tube of a tyre installation screw rod 11 and first nut 12, second inner tube of a tyre installation screw rod 20 and the 4th nut 19 are used for the installation of combined inner tube, and first inner tube of a tyre dismantling screw 15 and second nut 14, second inner tube of a tyre dismantling screw 16 and the 3rd nut 17 are used for the dismounting of combined inner tube.During installation, second nut 14, the 3rd nut 17 are backed out; Progressively tighten the upward relative position of wedge-like quadrangular 2, following wedge-like quadrangular 3 of first nut 12,19 adjustment of the 4th nut, make combined inner tube support U type zirconium groove 1 fully.Welding finishes back combined inner tube when dismounting, earlier first nut 12, the 4th nut 19 is backed out, and progressively tightens second nut 14 again, the 3rd nut 17 can be thrown off combined inner tube.
The detailed process that is welded into square zirconium alloy element box is, two U type zirconium grooves 1 are fixed on the combined inner tube outside, again U type zirconium groove 1 is fixed by zirconium box compressing structure, detent mechanism guarantees the axiality of 1 of combined inner tube, cover tire 4 and U type zirconium groove, the mould mounting mechanism is used for the U type zirconium groove 1 after the welding is taken off from combined inner tube, and the weld seam 4a place of two U type zirconium grooves 1 is consistent with the slotted hole 4b opening part that cover tire 4 docks.Adopt vacuum electron beam butt welded seam 4a place to weld, welding process comprises spot welding, pre-hot weld, formal weldering and finishing weldering; The butt welded seam surfaces externally and internally is wipeed off; U type zirconium groove with one takes out at last;
It is orthopedic that the U type zirconium groove of the one that step 3 is obtained carries out vacuum heat, thereby size is carried out finishing:
U type zirconium groove with one is placed in the orthopedic mould earlier,
Wherein, the structure of orthopedic mould comprises the inner tube of a tyre 23 of cuboid as shown in Figure 7, has square groove on the inner tube of a tyre 23 4 corner angle along its length, is respectively arranged with one jiao of rod 22 at 4 grooves.The U type zirconium groove of two one is enclosed within the outer surface of the inner tube of a tyre 23.The radius of angle rod 22 is consistent with the fillet radius of U type zirconium groove 1.
Again orthopedic mould is carried out vacuum heat, heat treatment temperature is 600 ℃, and temperature retention time 2.5 hours, vacuum are 1.3 * 10
-3Pa; U type zirconium groove with one behind the air cooling takes out;
The U type zirconium groove of the one that step 4 is obtained carries out surface treatment and pickling, and the pickling time is 4-6 minute, rinses well with demineralized water after the pickling, dries up with high-purity compressed air, promptly obtains high-accuracy square zirconium alloy element box of the present invention;
The acid solution of using in the acid cleaning process is, according to percent by volume, its component is,
3% HF, 30% HNO
3, 67% demineralized water.
Among the present invention, dimensional accuracy is the qualitative character of nuclear with a key of zirconium square box, it also is the link that emphasis solves among the present invention, final size is actually by the accurate Calculation of blanking operation, numerical control are meticulous mills that limit and weld mold guarantee, the size leeway of leaving orthopedic trimming for can not surpass 0.5mm, otherwise orthopedic mould can't be packed into, and this also is the reason that preparation method of the present invention can guarantee dimensional accuracy and promote yield rate significantly.
Choosing thickness is 2.2mm, and the satisfactory zirconium plate of roughness≤3.2 μ m adopts numerical controlled shearing machine blanking and finish-milling with the zirconium plate, obtains two zirconium plates behind the finish-milling; Perpendicularity deviation between zirconium plate adjacent edge is less than 0.3mm; Get two zirconium plates behind the finish-milling, adopt numerical control bender, two zirconium plates are bent into U type zirconium groove shape respectively, wherein the jig precision is ± 0.01mm, detailed process comprises along the vertical bending of sheet material, and shaping speed is that 80mm/min, upper and lower mould gap are that 2.0mm, load are that 50 tons, dwell time are that 5 seconds, the radius of corner 6mm of Bending punch, springback capacity are 0.6 °; Two U type zirconium grooves are utilized the notch butt joint of welding tooling with two U type zirconium grooves, be assembled into a square zirconium alloy element box, the long L of the square zirconium alloy element box that makes is 1100mm, thickness δ is 2.2mm, the outer surface length of side W of square zirconium alloy element box is 140.3mm, the inner surface length of side Wj of square zirconium alloy element box is 135.9mm, and the radius r of four fillets of square zirconium alloy element box is 6mm; It is orthopedic that the U type zirconium groove of one is carried out vacuum heat, and the U type zirconium groove with one is placed in the orthopedic mould earlier, more orthopedic mould is carried out vacuum heat, and heat treatment temperature is 600 ℃, and temperature retention time 2.5 hours, vacuum are 1.3 * 10
-3Pa, the U type zirconium groove with one behind the air cooling takes out; The U type zirconium groove of one is carried out surface treatment and pickling, and the pickling time is 4 minutes, rinses well with demineralized water after the pickling, dries up with high-purity compressed air, promptly obtains high-accuracy square zirconium alloy element box of the present invention.
Choosing thickness is 2.3mm, and the satisfactory zirconium plate of roughness≤3.2 μ m adopts numerical controlled shearing machine blanking and finish-milling with the zirconium plate, obtains two zirconium plates behind the finish-milling; Perpendicularity deviation between zirconium plate adjacent edge is less than 0.3mm; Get two zirconium plates behind the finish-milling, adopt numerical control bender, two zirconium plates are bent into U type zirconium groove shape respectively, wherein the jig precision is ± 0.01mm, detailed process comprises along the vertical bending of sheet material, and shaping speed is that 120mm/min, upper and lower mould gap are that 3.0mm, load are that 80 tons, dwell time are that 20 seconds, the radius of corner 6mm of Bending punch, springback capacity are 1 °; Two U type zirconium grooves are utilized the notch butt joint of welding tooling with two U type zirconium grooves, be assembled into a square zirconium alloy element box, the long L of the square zirconium alloy element box that makes is 1100mm+1mm, thickness δ is 2.3mm, the outer surface length of side W of square zirconium alloy element box is 140.3mm+0.4mm, the inner surface length of side Wj of square zirconium alloy element box is 135.9mm+0.3mm, and the radius r of four fillets of square zirconium alloy element box is 6mm; It is orthopedic that the U type zirconium groove of one is carried out vacuum heat, and the U type zirconium groove with one is placed in the orthopedic mould earlier, more orthopedic mould is carried out vacuum heat, and heat treatment temperature is 600 ℃, and temperature retention time 2.5 hours, vacuum are 1.3 * 10
-3Pa, the U type zirconium groove with one behind the air cooling takes out; The U type zirconium groove of one is carried out surface treatment and pickling, and the pickling time is 6 minutes, rinses well with demineralized water after the pickling, dries up with high-purity compressed air, promptly obtains high-accuracy square zirconium alloy element box of the present invention.
Choosing thickness is 2.25mm, and the satisfactory zirconium plate of roughness≤3.2 μ m adopts numerical controlled shearing machine blanking and finish-milling with the zirconium plate, obtains two zirconium plates behind the finish-milling; Perpendicularity deviation between zirconium plate adjacent edge is less than 0.3mm; Get two zirconium plates behind the finish-milling, adopt numerical control bender, two zirconium plates are bent into U type zirconium groove shape respectively, wherein the jig precision is ± 0.01mm, detailed process comprises along the vertical bending of sheet material, and shaping speed is that 100mm/min, upper and lower mould gap are that 2.5mm, load are that 60 tons, dwell time are that 10 seconds, the radius of corner 6mm of Bending punch, springback capacity are 0.8 °; Two U type zirconium grooves are utilized the notch butt joint of welding tooling with two U type zirconium grooves, be assembled into a square zirconium alloy element box, the long L of the square zirconium alloy element box that makes is 1100mm-1mm, thickness δ is 2.25mm, the outer surface length of side W of square zirconium alloy element box is 140.3mm-0.4mm, the inner surface length of side Wj of square zirconium alloy element box is 135.9mm-0.3mm, and the radius r of four fillets of square zirconium alloy element box is 6mm; It is orthopedic that the U type zirconium groove of one is carried out vacuum heat, and the U type zirconium groove with one is placed in the orthopedic mould earlier, more orthopedic mould is carried out vacuum heat, and heat treatment temperature is 600 ℃, and temperature retention time 2.5 hours, vacuum are 1.3 * 10
-3Pa, the U type zirconium groove with one behind the air cooling takes out; The U type zirconium groove of one is carried out surface treatment and pickling, and the pickling time is 5 minutes, rinses well with demineralized water after the pickling, dries up with high-purity compressed air, promptly obtains high-accuracy square zirconium alloy element box of the present invention.
Claims (5)
1. a weld mold is characterized in that, is made up of zirconium box supporting construction, zirconium box compressing structure, detent mechanism and mould mounting mechanism; Described zirconium box compressing structure is arranged on zirconium box supporting construction outside, and described detent mechanism is arranged on the both ends of the surface of zirconium box compressing structure, and described mould mounting mechanism is arranged between the both ends of the surface and zirconium box supporting construction of zirconium box compressing structure;
Described zirconium box supporting construction is: comprise the combined inner tube of being made up of last wedge-like quadrangular (2) and following wedge-like quadrangular (3), described upward wedge-like quadrangular (2) lower surface is a last wedge-like quadrangular faying face (2c), the described wedge-like quadrangular faying face (2c) of going up is provided with keyway (2a), described following wedge-like quadrangular (3) upper surface is following wedge-like quadrangular faying face (3c), described wedge-like quadrangular faying face (3c) down is provided with key (3a), and keyway (2a) is little matched in clearance with key (3a); The end, two ends of described combined inner tube is provided with locating shaft (2e) and following locating shaft (3e), and described upward locating shaft (2e) upward is provided with at last wedge-like quadrangular (2), and described locating shaft (3e) down is in upward setting of wedge-like quadrangular (3) down; The upper and lower surface of combined inner tube is provided with rectangle elongated slot (2d) and following rectangle elongated slot (3d);
Described zirconium box compressing structure is: comprise cover tire (4), the upper and lower surface of cover tire (4) is provided with slotted hole (4b), also be provided with wide pressing plate (5) and narrow pressing plate (6) in the cover tire (4), four sides of described cover tire (4) are provided with housing screw (7) and first packing ring (8);
The structure of described detent mechanism is: comprise the end gland (10) that cover tire (4) both ends are provided with, end gland (10) center is provided with locating hole, and the following locating shaft (3e) at the last locating shaft (2e) at last wedge-like quadrangular (2) two ends, following wedge-like quadrangular (3) two ends passes locating hole simultaneously and fixes;
The structure of described mould mounting mechanism is: comprise first inner tube of a tyre installation screw rod (11), first inner tube of a tyre dismantling screw (15) that are connected with last wedge-like quadrangular (2) two ends, also comprise second inner tube of a tyre dismantling screw (16) and second inner tube of a tyre installation screw rod (20) that are connected with following wedge-like quadrangular (3) two ends, described first inner tube of a tyre is installed screw rod (11), first inner tube of a tyre dismantling screw (15), second inner tube of a tyre dismantling screw (16) and second inner tube of a tyre and screw rod (20) is installed is passed circular hole on the end gland (10) respectively, and with combined inner tube thread connection separately; Described first inner tube of a tyre is installed on screw rod (11), first inner tube of a tyre dismantling screw (15), second inner tube of a tyre dismantling screw (16), second inner tube of a tyre installation screw rod (20) and is respectively arranged with nut.
2. weld mold according to claim 1 is characterized in that, is provided with rubber blanket (9) between described U type zirconium groove (1) and wide pressing plate (5), U type zirconium groove (1) and the narrow pressing plate (6).
3. a preparation method who adopts this weld mold processing high-accuracy square zirconium alloy element box as claimed in claim 1 or 2 is characterized in that, specifically may further comprise the steps:
Step 1,
Choosing thickness δ is 2.2mm-2.3mm, and the zirconium plate of roughness≤3.2 μ m adopts numerical controlled shearing machine blanking and finish-milling with the zirconium plate, and obtaining length is 1100 ± 1mm, and wide is zirconium plate behind two finish-millings of 268.5 ± 0.03mm; The four edges that guarantees the zirconium plate is smooth, and the perpendicularity deviation between adjacent edge is less than 0.3mm;
Step 2,
Get two zirconium plates behind step 1 finish-milling, adopt numerical control bender, two zirconium plates are bent into U type zirconium groove shape respectively, the jig precision is ± 0.01mm, and shaping speed 80mm/min-120mm/min, upper and lower mould gap 2.0mm-3.0mm, 50 tons-80 tons of load, dwell time 5-20 second, the radius of corner 6mm of Bending punch, springback capacity are 0.6 °-1 °;
Step 3,
Use a kind of weld mold in this step 3, form by zirconium box supporting construction, zirconium box compressing structure, detent mechanism and mould mounting mechanism; Described zirconium box compressing structure is arranged on zirconium box supporting construction outside, and described detent mechanism is arranged on the both ends of the surface of zirconium box compressing structure, and described mould mounting mechanism is arranged between the both ends of the surface and zirconium box supporting construction of zirconium box compressing structure;
Described zirconium box supporting construction is: comprise the combined inner tube of being made up of last wedge-like quadrangular (2) and following wedge-like quadrangular (3), described upward wedge-like quadrangular (2) lower surface is a last wedge-like quadrangular faying face (2c), the described wedge-like quadrangular faying face (2c) of going up is provided with keyway (2a), described following wedge-like quadrangular (3) upper surface is following wedge-like quadrangular faying face (3c), described wedge-like quadrangular faying face (3c) down is provided with key (3a), and keyway (2a) is little matched in clearance with key (3a); The end, two ends of described combined inner tube is provided with locating shaft (2e) and following locating shaft (3e), and described upward locating shaft (2e) upward is provided with at last wedge-like quadrangular (2), and described locating shaft (3e) down is in upward setting of wedge-like quadrangular (3) down; The upper and lower surface of combined inner tube is provided with rectangle elongated slot (2d) and following rectangle elongated slot (3d);
Described zirconium box compressing structure is: comprise cover tire (4), the upper and lower surface of cover tire (4) is provided with slotted hole (4b), and slotted hole (4b) is relative with weld seam (4a) position between two U type zirconium grooves; Also be provided with wide pressing plate (5) and narrow pressing plate (6) in the cover tire (4), four sides of described cover tire (4) are provided with housing screw (7) and first packing ring (8);
The structure of described detent mechanism is: comprise the end gland (10) that cover tire (4) both ends are provided with, end gland (10) center is provided with locating hole, and the following locating shaft (3e) at the last locating shaft (2e) at last wedge-like quadrangular (2) two ends, following wedge-like quadrangular (3) two ends passes locating hole simultaneously and fixes;
The structure of described mould mounting mechanism is: comprise first inner tube of a tyre installation screw rod (11), first inner tube of a tyre dismantling screw (15) that are connected with last wedge-like quadrangular (2) two ends, also comprise second inner tube of a tyre dismantling screw (16) and second inner tube of a tyre installation screw rod (20) that are connected with following wedge-like quadrangular (3) two ends, described first inner tube of a tyre installation screw rod (11), first inner tube of a tyre dismantling screw (15), second inner tube of a tyre dismantling screw (16) and second inner tube of a tyre installation screw rod (20) pass the circular hole on the end gland (10) respectively; Described first inner tube of a tyre is installed on screw rod (11), first inner tube of a tyre dismantling screw (15), second inner tube of a tyre dismantling screw (16), second inner tube of a tyre installation screw rod (20) and is respectively arranged with nut, utilizes above-mentioned weld mold, implements following operation,
Two U type zirconium grooves that step 2 is made dock notch, earlier two U type zirconium grooves are enclosed within the outer surface of weld mold combined inner tube, the commissure of two U type zirconium grooves is consistent with the opening part of two U type frame butt joints, adopt vacuum electron beam butt welded seam place to weld, the butt welded seam surfaces externally and internally is wipeed off, and the U type zirconium groove with one takes out at last;
Step 4,
It is orthopedic that the U type zirconium groove of the one that step 3 is obtained carries out vacuum heat, thereby size is carried out finishing:
U type zirconium groove with one is placed in the orthopedic mould earlier, more orthopedic mould is carried out vacuum heat, and heat treatment temperature is 600 ℃, and temperature retention time 2.5 hours, vacuum are 1.3 * 10
-3Pa; U type zirconium groove with one behind the air cooling takes out;
Step 5,
The U type zirconium groove of the one that step 4 is obtained carries out surface treatment and pickling, and the pickling time is 4-6 minute, rinses well with demineralized water after the pickling, dries up with high-purity compressed air, promptly.
4. processing method according to claim 3 is characterized in that, is provided with rubber blanket (9) between described U type zirconium groove (1) and wide pressing plate (5), U type zirconium groove (1) and the narrow pressing plate (6).
5. according to claim 3 or 4 described processing methods, it is characterized in that, the structure of the orthopedic mould in the described step 4, the inner tube of a tyre (23) that comprises cuboid, have square groove on the inner tube of a tyre (23) 4 corner angle along its length, be respectively arranged with angle rod (22) at 4 grooves, the radius of angle rod (22) is consistent with the fillet radius of U type zirconium groove.
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| CN2010102309469A CN101905405B (en) | 2010-07-16 | 2010-07-16 | Welding mould and method for processing high-accuracy square zirconium alloy element box |
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| CN102371462A (en) * | 2011-01-30 | 2012-03-14 | 深圳市大富科技股份有限公司 | High energy beam welding jig |
| CN102717234A (en) * | 2012-06-20 | 2012-10-10 | 杨学刚 | Method for processing meter casing of water meter |
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| CN106623487B (en) * | 2016-12-13 | 2018-08-28 | 清华大学 | The preparation method of zirconium alloy element box |
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| CN106623487B (en) * | 2016-12-13 | 2018-08-28 | 清华大学 | The preparation method of zirconium alloy element box |
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| CN112453832A (en) * | 2020-11-15 | 2021-03-09 | 西安长峰机电研究所 | Forming method of rectangular aluminum alloy square box with large length-diameter ratio |
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