CN111736102A - Spherical frame of nuclear magnetic resonance equipment, transportation tool and production process - Google Patents
Spherical frame of nuclear magnetic resonance equipment, transportation tool and production process Download PDFInfo
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- CN111736102A CN111736102A CN202010640186.2A CN202010640186A CN111736102A CN 111736102 A CN111736102 A CN 111736102A CN 202010640186 A CN202010640186 A CN 202010640186A CN 111736102 A CN111736102 A CN 111736102A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G35/00—Mechanical conveyors not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/22—Devices influencing the relative position or the attitude of articles during transit by conveyors
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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Abstract
The invention provides a spherical frame of nuclear magnetic resonance equipment, which belongs to the technical field of cast products and comprises a hemispherical shell, wherein a flange is arranged on the end surface of the shell, a plurality of first arc-shaped plates are distributed on the spherical surface of the shell along the longitude line, a plurality of second arc-shaped plates are distributed on the spherical surface of the shell along the latitude line, the spherical surface is divided into a plurality of areas by the first arc-shaped plates and the second arc-shaped plates, conformal through holes are formed in the plurality of areas, reinforcing edges are arranged on the outer side surface of each first arc-shaped plate along the length direction of the first arc-shaped plate, a connecting sleeve extending towards the outer side of the shell is arranged on the spherical surface, and the spherical center of the shell is positioned on the axis of. The invention provides a nuclear magnetic resonance equipment spherical frame transportation tool and a nuclear magnetic resonance equipment spherical frame production process. The spherical frame of the nuclear magnetic resonance equipment provided by the invention reduces the manufacturing cost.
Description
Technical Field
The invention belongs to the technical field of cast products, and particularly relates to a spherical frame of nuclear magnetic resonance equipment, a transportation tool and a production process.
Background
The spherical frame of the nuclear magnetic resonance equipment is a casting made of ductile iron, and various detection devices and auxiliary devices are mainly installed by depending on the main frame body, so that the main frame body is required to have certain strength. At present, the conventional spherical frame of nuclear magnetic resonance equipment is usually made into a solid structure through a main frame body, or the thickness of the main frame body is increased, or the structural strength of the main frame body is improved by adding too many reinforcing ribs or reinforcing ribs and other modes on the main frame body, and the method can increase the weight of the main frame body and cause the improvement of the manufacturing cost.
Disclosure of Invention
The invention aims to provide a spherical frame of nuclear magnetic resonance equipment, and aims to solve the problem of manufacturing cost increase caused by the way of making a main frame into a solid structure, increasing the thickness of the main frame, adding too many reinforcing ribs or reinforcing ribs on the main frame and the like in order to improve the structural strength of the main frame.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a nuclear magnetic resonance equipment sphere frame, including being hemispherical casing, the terminal surface of casing is equipped with the flange, the spherical longitude line distribution of personally submitting of casing has a plurality of first arcs, the spherical latitude line distribution of personally submitting of casing has a plurality of second arcs, and is a plurality of first arc and a plurality of the second arc will the spherical partition is a plurality of regions, and is a plurality of along shape through-hole has all been seted up in the region, the lateral surface of first arc is equipped with the enhancement arris that sets up along its length direction, set up on the spherical surface to the adapter sleeve that the casing outside extends, the centre of sphere of casing is located on the axis of adapter sleeve.
The spherical frame of the nuclear magnetic resonance equipment has the beneficial effects that: compared with the prior art, the spherical frame of the nuclear magnetic resonance equipment is characterized in that the spherical surface of the spherical frame is provided with the connecting sleeve, the spherical frame is of a spherical frame body structure formed by a plurality of first arc-shaped plates distributed in a longitude line and a plurality of second arc-shaped plates distributed in a latitude line, the outer side surface of each first arc-shaped plate is provided with the reinforcing edge arranged along the length direction of the first arc-shaped plate, the spherical surfaces are separated into a plurality of areas by the plurality of first arc-shaped plates and the plurality of second arc-shaped plates, and the plurality of areas are respectively provided with the conformal through holes.
The invention also provides a spherical frame for transporting the nuclear magnetic resonance equipment, which comprises a bearing bracket and a longitudinal support frame, wherein the longitudinal support frame is fixedly arranged on one side of the bearing bracket, an inclined support frame is arranged between the longitudinal support frame and the bearing bracket, a first clamping groove is transversely arranged on the longitudinal support frame, a second clamping groove is transversely arranged on the inclined support frame, the first clamping groove and the second clamping groove are used for clamping the reinforcing ribs, a plurality of positioning blocks are arranged on the upper end surface of the bearing bracket, and the positioning blocks are arranged at intervals and are circumferentially arranged and are used for clamping the connecting sleeve in the supporting bracket.
As another embodiment of this application, all be equipped with first elastic cushion layer in first draw-in groove with the second draw-in groove, first elastic cushion layer is used for contacting one side of strengthening the arris is equipped with the arc concave surface.
As another embodiment of this application, the medial surface of locating piece is equipped with the second elastic cushion layer, the second elastic cushion layer is used for contacting the lower part of one side of adapter sleeve is equipped with the cushion.
The spherical frame transportation tool for the nuclear magnetic resonance equipment has the beneficial effects that: compared with the prior art, the nuclear magnetic resonance equipment spherical frame transporting tool has the advantages that the connecting sleeve of the spherical frame is vertically arranged on the upper end face of the bearing bracket and is clamped inside the positioning blocks, meanwhile, the reinforcing ribs on the spherical face of the spherical frame are respectively clamped in the first clamping groove and the second clamping groove, the stability of the nuclear magnetic resonance equipment spherical frame can be ensured by utilizing the clamping structures, and the problem that the nuclear magnetic resonance equipment spherical frame is shaken in the transporting process to cause collision and scratch is solved.
The invention also provides a production process for producing the spherical frame of the nuclear magnetic resonance equipment, which comprises the following steps:
s1: modeling: taking the end face of the shell as a parting surface, arranging a whole circle of transverse runners along the outer ring of the end face, respectively arranging straight runners at opposite sides of the transverse runners, arranging a plurality of inner runners at intervals on the inner sides of the transverse runners, arranging a plurality of top risers at the top of the shell, arranging exhaust channels at the intersection of the first arc-shaped plate and the second arc-shaped plate and at the upper end of the connecting sleeve, and embedding chills at the lower part of the flange circumference, the lower part of the connecting sleeve circumference and the lower part of the intersection of the first arc-shaped plates;
s2: smelting: smelting the ductile iron made of A536Q material by using an electric furnace, discharging at 1500-1540 ℃, and performing spheroidizing inoculation by adopting a stream inoculation mode;
s3: pouring: pouring simultaneously in two straight pouring gates in a double-leakage ladle pouring mode, wherein the pouring time is not more than 15min, and pouring at least two groups of test blocks in the same furnace simultaneously;
s4: cleaning: adopting a vibrating box to shake off sand, then sequentially removing a pouring system and performing primary shot blasting treatment on the blank, and performing nondestructive testing and size measurement;
s5: and (3) heat treatment: and simultaneously placing the blank and the test block in a heat treatment furnace, heating to 550-580 ℃, preserving heat for 3-5h, cooling to 200 ℃ in the furnace, and then air-cooling to room temperature.
As another embodiment of this application, in step S1, the chiller of the lower part of flange week and the chiller of the lower part of adapter sleeve week all separate 5 ~ 10cm, and the chiller at the intersection of a plurality of first arcs is the matrix and arranges, and separates 5 ~ 10cm, pre-buried chromite sand between the chiller.
As another embodiment of the present application, after step S2, the liquid surface is penetrated by a preheated stirring bar more than 400mm and stirred in the same direction for at least 10 turns.
As another embodiment of the present application, after step S5, a secondary shot blasting process is performed, and the diameter of the steel shot of the secondary shot blasting process is smaller than that of the primary shot blasting process.
The production process of the spherical frame of the nuclear magnetic resonance equipment has the beneficial effects that: compared with the prior art, the production process of the spherical frame of the nuclear magnetic resonance equipment takes the end face of the shell as a parting surface, a whole circle of cross runners are distributed along the outer ring of the end face, the opposite sides of the cross runners are respectively provided with a straight runner, the inner sides of the cross runners are distributed with a plurality of inner runners at intervals, a plurality of top risers are distributed at the top of the shell, exhaust passages are arranged at the intersection of the first arc-shaped plate and the second arc-shaped plate and the upper end of the connecting sleeve, and cold iron is buried at the lower part of the periphery of the flange, the lower part of the periphery of the connecting sleeve and the lower part of the intersection of the first; smelting the ductile iron made of A536Q material by using an electric furnace, discharging at 1500-1540 ℃, and performing spheroidizing inoculation by adopting a stream inoculation mode. Pouring simultaneously in two straight pouring gates in a double-leakage ladle pouring mode, wherein the pouring time is not more than 15min, and pouring at least two groups of test blocks in the same furnace simultaneously; adopting a vibrating box to shake off sand, then sequentially removing a pouring system and performing primary shot blasting treatment on the blank, and performing nondestructive testing and size measurement; through laying two sprue, whole circle horizontal runner and a plurality of ingate, under the reasonable prerequisite of ensureing to smelt, promoted the speed of pouring to laying cap mouth, exhaust passage and chill, ensure the compactness of product internal organization, via the clearance of epilogue and thermal treatment process, obtain the ball-shaped frame product that the quality satisfies the requirement.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a diagram illustrating a state in which a spherical frame of a nuclear magnetic resonance apparatus according to an embodiment of the present invention is placed on a transportation tool;
fig. 2 is a schematic structural diagram of a first clamping groove and a first elastic cushion of a spherical frame of a nuclear magnetic resonance apparatus according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;
fig. 4 is a schematic structural diagram of a second slot and a second elastic cushion of the spherical rack of the nuclear magnetic resonance apparatus according to the embodiment of the present invention;
fig. 5 is a first schematic structural diagram of a molding process in a production process of a spherical rack of nuclear magnetic resonance equipment according to an embodiment of the present invention;
fig. 6 is a structural schematic diagram ii of a molding process setup in a production process of a spherical rack of nuclear magnetic resonance equipment according to an embodiment of the present invention;
FIG. 7 is a heat treatment process diagram of a nuclear magnetic resonance apparatus spherical frame according to an embodiment of the present invention;
fig. 8 is a gold phase diagram of a spherical holder of a nuclear magnetic resonance apparatus according to an embodiment of the present invention.
In the figure: 1. a housing; 2. a flange; 3. a first arc-shaped plate; 4. a second arc-shaped plate; 5. a conformal through hole; 6. reinforcing edges; 7. connecting sleeves; 8. a support bracket; 9. a longitudinal support frame; 10. inclining the support frame; 11. a first card slot; 12. a second card slot; 13. positioning blocks; 14. a first elastic cushion layer; 15. an arc-shaped concave surface; 16. a second elastic cushion layer; 17. and a cushion block.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in 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.
Referring to fig. 1, a nuclear magnetic resonance apparatus ball-shaped mount according to the present invention will now be described. Spherical frame of nuclear magnetic resonance equipment, including being hemispherical casing 1, the terminal surface of casing 1 is equipped with flange 2, the spherical longitude line distribution of personally submitting of casing 1 has a plurality of first arcs 3, the spherical latitude line distribution of personally submitting of casing 1 has a plurality of second arcs 4, a plurality of first arcs 3 and a plurality of second arcs 4 are with spherical face partition and are a plurality of regions, shape-following through-hole 5 has all been seted up in a plurality of regions, the lateral surface of first arc 3 is equipped with the enhancement arris 6 that sets up along its length direction, set up the adapter sleeve 7 that extends to the casing 1 outside on the spherical face, the centre of sphere of casing 1 is located the axis of adapter sleeve 7.
Compared with the prior art, the spherical surface of the spherical frame is provided with the connecting sleeve 7, the spherical frame is of a spherical frame body structure consisting of a plurality of first arc-shaped plates 3 distributed in a longitudinal line and a plurality of second arc-shaped plates 4 distributed in a latitudinal line, the outer side surface of each first arc-shaped plate 3 is provided with the reinforcing edge 6 arranged along the length direction of the first arc-shaped plate, the spherical surface is divided into a plurality of areas by the plurality of first arc-shaped plates 3 and the plurality of second arc-shaped plates 4, and the plurality of areas are respectively provided with the conformal through holes 5.
The spherical frame is a manufactured piece which is integrally cast, annular assembling grooves are machined in the side wall of the flange 2 at the end part of the shell 1 and the side wall of the connecting sleeve 7, and threaded mounting holes are machined in the end part of the flange 2. Wherein, the intersection of a plurality of first arcs 3 is curved whole panel, improves the structural strength of spherical frame, and in addition, a plurality of second arcs 4 concentrate on the middle part of spherical face, do not have with the intersection of a plurality of first arcs 3 and intersect, can make form as much as possible on the spherical face along with shape through-hole 5, and the bight of following shape through-hole 5 is equipped with the circular arc structure, reduces the internal stress of product.
Referring to fig. 1, a nuclear magnetic resonance equipment sphere rack transportation tool provided by the present invention will now be described. The nuclear magnetic resonance equipment spherical frame transporting tool is used for transporting the nuclear magnetic resonance equipment spherical frame and comprises a bearing bracket 8 and a longitudinal supporting frame 109, the longitudinal supporting frame 109 is fixedly arranged on one side of the bearing bracket 8, an inclined supporting frame is arranged between the longitudinal supporting frame 109 and the bearing bracket 8, a first clamping groove 11 transversely arranged is formed in the longitudinal supporting frame 109, a second clamping groove 12 transversely arranged is formed in the inclined supporting frame, the first clamping groove 11 and the second clamping groove 12 are used for clamping a reinforcing ridge 6, a plurality of positioning blocks 13 are arranged on the upper end face of the bearing bracket 8, and the positioning blocks 13 are arranged at intervals and are arranged circumferentially and are used for clamping a connecting sleeve 7 in the connecting frame.
Compared with the prior art, the nuclear magnetic resonance equipment spherical frame transportation tool provided by the invention has the advantages that the connecting sleeve 7 of the spherical frame is vertically arranged on the upper end surface of the support bracket 8, the connecting sleeve 7 is clamped inside the positioning blocks 13, meanwhile, the reinforcing ribs 6 on the spherical surface of the spherical frame are respectively clamped in the first clamping groove 11 and the second clamping groove 12, the stability of the nuclear magnetic resonance equipment spherical frame can be ensured by utilizing the clamping structures, and the problem of collision and scratch caused by shaking in the transportation process of the nuclear magnetic resonance equipment spherical frame is avoided.
The support bracket 8 comprises a plurality of cross beams and a plurality of longitudinal beams welded on the lower portions of the cross beams, the longitudinal beams are bearing parts, the longitudinal support frame 109 is vertically welded on one side of the cross beams, the upper portion of the longitudinal support frame is transversely welded with a connecting beam, the connecting beam is made of U-shaped steel, and a first clamping groove 11 is formed inside the connecting beam. Similarly, the inclined welding of the upper side of the inclined support frame has a connecting beam, the connecting beam is made of U-shaped steel, and a second clamping groove 12 is formed inside the connecting beam. The positioning blocks 13 may be welded and fixed to the upper end surface of the support bracket 8. In addition, a plurality of locating pieces 13 also can be fixed at the up end of support bracket 8 through the mode of bolt, be equipped with the screw hole in the bottom of locating piece 13, seted up a plurality of mounting holes on the longeron of support bracket 8, use the bolt to run through the mounting hole from bottom to top, threaded connection is in the bottom of locating piece 13, and several groups can be seted up to the position of mounting hole in the circumferencial direction, through dismouting locating piece 13, can match the location of the adapter sleeve 7 of the different diameters of the spherical frame of different models.
Referring to fig. 2 to 3, as a specific embodiment of the spherical frame of the nmr apparatus provided by the present invention, a first elastic cushion layer 14 is disposed in each of the first slot 11 and the second slot 12, and an arc concave surface 15 is disposed on one side of the first elastic cushion layer 14 contacting the reinforcing rib 6. In this embodiment, one side that vertical backup pad is close to support bracket 8 has transversely welded U type frame, and the upper side inclined plane of slope backup pad has transversely welded U type frame, and two U type frames all possess U type opening, and this U type opening constitutes first draw-in groove 11 and second draw-in groove 12 respectively. First elastic cushion 14 is the rubber cushion, bonds respectively in first draw-in groove 11 and second draw-in groove 12, and the arc concave surface 15 of first elastic cushion 14 is unanimous with the radian of strengthening arris 6, can well match and strengthen arris 6, avoids strengthening arris 6 and leads to the condition of the fish tail of colliding with first draw-in groove 11 and the rigid contact of second draw-in groove 12.
As a specific embodiment of the spherical frame of the nuclear magnetic resonance equipment provided by the present invention, please refer to fig. 4, a second elastic cushion layer 16 is disposed on an inner side surface of the positioning block 13, and a cushion block 17 is disposed on a lower portion of a side of the second elastic cushion layer 16 contacting the connecting sleeve 7. In this embodiment, the groove of stepping down has been seted up to the lower part of the inside wall of locating piece 13, and second elastic cushion 16 is the rubber cushion, bonds at the inside wall of locating piece 13, and the bottom integrated into one piece of the 16 lateral surfaces of second elastic cushion has outside convex fixture block, and the fixture block is pegged graft in this groove of stepping down, can guarantee second elastic cushion 16's stability, avoids second elastic cushion 16 to deviate from the inboard of locating piece 13. Meanwhile, a cushion block 17 is integrally formed at the bottom of the inner side wall of the second elastic cushion layer 16, the cushion block 17 extends towards the inner side of the positioning block 13, and the lower end face of the connecting sleeve 7 of the spherical frame is placed on the upper end faces of the cushion blocks 17. Because the end face and the side wall of the connecting sleeve 7 are both machined surfaces, the side inner wall of the second elastic cushion layer 16 can avoid the rigid contact between the side wall of the connecting sleeve 7 and the positioning block 13, and the cushion block 17 can avoid the rigid contact between the end face of the connecting sleeve 7 and the upper end face of the support bracket 8. The second elastic cushion layer 16 can effectively protect the processing surface of the connecting sleeve 7 and avoid the problem that the connecting sleeve is collided and scratched.
Referring to fig. 1, 5 to 8, a process for manufacturing a spherical frame of a nuclear magnetic resonance apparatus according to the present invention will now be described. A production process of a spherical frame of nuclear magnetic resonance equipment comprises the following steps:
s1: modeling: the end face of the shell 1 is taken as a parting surface, a whole circle of transverse runners are arranged along the outer ring of the end face, straight runners are respectively arranged on the opposite sides of the transverse runners, a plurality of inner runners are arranged at intervals on the inner sides of the transverse runners, a plurality of top risers are arranged at the top of the shell 1, exhaust passages are formed at the intersection of the first arc-shaped plate 3 and the second arc-shaped plate 4 and the upper end of the connecting sleeve 7, and cold iron is buried in the lower portion of the circumference of the flange 2, the lower portion of the circumference of the connecting sleeve 7 and the lower portion of the intersection of the first arc-shaped plates;
s2: smelting: smelting the ductile iron made of A536Q material by using an electric furnace, discharging at 1500-1540 ℃, and performing spheroidizing inoculation by adopting a stream inoculation mode;
s3: pouring: pouring simultaneously in two straight pouring gates in a double-leakage ladle pouring mode, wherein the pouring time is not more than 15min, and pouring at least two groups of test blocks in the same furnace simultaneously;
s4: cleaning: adopting a vibrating box to shake off sand, then sequentially removing a pouring system and performing primary shot blasting treatment on the blank, and performing nondestructive testing and size measurement;
s5: and (3) heat treatment: and simultaneously placing the blank and the test block in a heat treatment furnace, heating to 550-580 ℃, preserving heat for 3-5h, cooling to 200 ℃ in the furnace, and then air-cooling to room temperature.
Compared with the prior art, the production process of the spherical frame of the nuclear magnetic resonance equipment has the advantages that the end face of the shell 1 is taken as a parting surface, a whole circle of transverse runners are distributed along the outer ring of the end face, the opposite sides of the transverse runners are respectively provided with a straight runner, a plurality of inner runners are distributed at intervals on the inner sides of the transverse runners, a plurality of top risers are distributed at the top of the shell 1, exhaust channels are formed at the intersection of the first arc-shaped plate 3 and the second arc-shaped plate 4 and the upper end of the connecting sleeve 7, and cold iron is buried at the lower part of the circumference of the flange 2, the lower part of the circumference of the connecting sleeve 7 and the lower part of the intersection; smelting the ductile iron made of A536Q material by using an electric furnace, discharging at 1500-1540 ℃, and performing spheroidizing inoculation by adopting a stream inoculation mode. Pouring simultaneously in two straight pouring gates in a double-leakage ladle pouring mode, wherein the pouring time is not more than 15min, and pouring at least two groups of test blocks in the same furnace simultaneously; adopting a vibrating box to shake off sand, then sequentially removing a pouring system and performing primary shot blasting treatment on the blank, and performing nondestructive testing and size measurement; through laying two sprue, whole circle horizontal runner and a plurality of ingate, under the reasonable prerequisite of ensureing to smelt, promoted the speed of pouring to laying cap mouth, exhaust passage and chill, ensure the compactness of product internal organization, via the clearance of epilogue and thermal treatment process, obtain the ball-shaped frame product that the quality satisfies the requirement.
Wherein, bury the brick steel underground to the sprue bottom of sprue just, the brick steel is just brushing fire resistant coating to the terminal surface of sprue, in order to satisfy pouring pressure's demand, the sprue need be greater than the height of the interior die cavity of product upper portion box, because the height of sprue is great, high temperature molten metal gets into the back from the sprue, can strike the sprue just to the sprue bottom, bury the brick steel underground and can avoid the impact force to destroy the sand mould, reduce the defect that the foundry goods pressed from both sides the sand, should compromise the fire-resistant ability of this position simultaneously, consequently. The thickness of the coating of the refractory coating at this location should not be less than twice the thickness of the coating in its cavity.
The material of the spherical frame of the nuclear magnetic resonance equipment provided by the invention is ASTM A53665-45-12, which is a nodular cast iron mark of American standard;
the components by percentage are (molten iron):
C：3.6-3.9Wt％，Si：1.1-1.3Wt％，Mn：<0.2Wt％，P：<0.04Wt％，S：<0.03Wt％。
in the smelting process, the nodulizer is a Longnan FD-3A heavy rare earth nodulizer, and the addition amount is 1.0-1.5%. The inoculant is inoculated by 30 percent of Fuji family 390 pretreating agent and 65 percent to 70 percent of 75 plus inoculant. The nodulizer is covered with the ductile iron beans. The reaction time is preferably controlled within the range of 100s to 120 s. 20-25% of molten iron is reserved in the spheroidizing tundish.
Before the pouring, the upper box is used as a bearing, two parallel steel beams are erected, two sprue gates are located in the middle of the two steel beams, and after the two steel beams are laid, the two steel beams are fixed on the upper box in a spot welding mode. When pouring, the leaky ladle is placed on the two steel beams, so that the ladle eye of the leaky ladle is aligned with the sprue, the plumb bob can be positioned, the plumb bob is suspended below the leaky ladle eye in advance, the plumb bob is enabled to vertically enter the sprue, and when the plumb bob is positioned in the middle of the sprue, the position of the leaky ladle is determined. In the pouring process, a shaking ladle is required to be prepared as a supplement ladle, and molten iron is supplemented into any leakage ladle through the supplement ladle, so that the pouring amount is ensured to meet the requirement of a blank.
During heat treatment, the charging temperature of the blank is less than 200 ℃, the furnace cooling speed is less than 50 ℃/h, wherein the heat preservation time is determined according to the maximum wall thickness of the blank, namely 25 mm/h.
Carrying out metallographic analysis and mechanical property detection after the test block in the same furnace is subjected to heat treatment, wherein the spheroidization rate is more than or equal to 85%;
the performance is as follows бb≥450；бs≥310；≥12；HB156-217。
Example 1:
the components by percentage are (molten iron):
C：3.6Wt％，Si：1.22Wt％，Mn：0.12Wt％，P：0.033Wt％，S：0.013Wt％。
the addition amount of the FD-3A heavy rare earth nodulizer of the Longnan is 1.2 percent. The inoculant was inoculated with 30% of Fuziaceae 390 inoculant and 70% of 75+ inoculant, and the reaction time was 100 s. 25% of base iron is remained in a spheroidizing tundish, and the tapping temperature is 1500 ℃;
pouring time is 13min11s, and no complement treatment is carried out;
after cleaning the blank, charging the blank at 76 ℃, heating to 550 ℃ at a heating speed of 80 ℃/h, keeping the temperature for 3.5 hours, cooling to 200 ℃ in the furnace, cooling to 40 ℃/h in the furnace, and cooling to room temperature in air;
the hardness and the mechanical property of the two groups of test blocks are shown in the table I,
Example 2:
the components by percentage are (molten iron):
C：3.78Wt％，Si：1.17Wt％，Mn：0.16Wt％，P：0.013Wt％，S：0.007Wt％。
the addition amount of the FD-3A heavy rare earth nodulizer of the Longnan is 1.3 percent. The inoculant was inoculated with 30% of Fuziaceae 390 inoculant and 70% of 75+ inoculant, and the reaction time was 100 s. 25% of base iron is remained in the spheroidizing tundish, and the tapping temperature is 1520 ℃;
pouring time is 12min56s, and no complement treatment is carried out;
after cleaning the blank, charging the blank at 71 ℃, heating to 570 ℃ at a heating speed of 80 ℃/h, keeping the temperature for 4 hours, cooling to 200 ℃ in the furnace, cooling to 40 ℃/h in the furnace, and cooling to room temperature;
the hardness and the mechanical property of the two groups of test blocks are shown in the second table,
watch two
As a specific embodiment of the production process of the spherical frame of the nuclear magnetic resonance equipment provided by the invention, referring to fig. 5 to 6, in step S1, the chills at the lower part of the circumference of the flange 2 and the chills at the lower part of the circumference of the connecting sleeve 7 are both spaced by 5 to 10cm, the chills at the intersection of the plurality of first arc-shaped plates 3 are arranged in a matrix and spaced by 5 to 10cm, and chromite sand is pre-buried between the chills. In this embodiment, the chill is subjected to an acid pickling process before use to remove rust on the surface, and the chill at the lower part of the circumference of the flange 2 and the chill at the lower part of the circumference of the connecting sleeve 7 are rectangular parallelepiped and are embedded at intervals in the circumferential direction. The chilling blocks at the intersection of the first arc-shaped plates 3 are processed in advance to form an arc-shaped structure close to the side face of the first arc-shaped plate 3, the arc-shaped structure is matched with the spherical surface of the spherical frame, and the arc-shaped structure and the spherical surface of the spherical frame are embedded in a matrix at intervals. The distance between the chilling block and the cavity is 5-10 cm, chromite sand is pre-buried between the chilling block and the chilling block in the chilling block and the cavity, the chromite sand is special sand for casting, natural spinel mainly comprising chromite is crushed and screened into a specified particle size, the chromite sand is a chilling material, the chromite sand can be matched with the chilling block to rapidly cool the metal liquid in the region, the preferential solidification of the metal liquid at the large cavity part can be improved, and the internal organization form of the part is improved.
As a specific embodiment of the production process of the spherical rack of the nuclear magnetic resonance equipment, after the step S2, a preheated stirring rod is used to penetrate into the liquid level to be more than 400mm, and the stirring is carried out for at least 10 circles along the same direction. In this embodiment, use stirring the thick stick and insert 400mm below the liquid level of molten metal to clockwise or anticlockwise stir the molten metal, can improve the balling rate of molten metal, guarantee the quality of molten metal. Meanwhile, impurities in the molten metal can float upwards quickly, and the slag inclusion defect of the casting is reduced.
As a specific implementation manner of the production process of the spherical frame of the nuclear magnetic resonance equipment, after the step S5, a secondary shot blasting treatment is performed, and the diameter of the steel shot subjected to the secondary shot blasting treatment is smaller than that of the primary shot blasting treatment. In the embodiment, the diameter of the steel shot with enlarged particles is 1.0-1.8mm in the primary shot blasting treatment, partial internal stress in the casting can be eliminated through the primary shot blasting, and part of bonded sand which is not completely cleaned is removed. The diameter of the steel shot subjected to the secondary shot blasting treatment is 0.2-0.8mm, so that the smoothness of the surface of the casting can be improved, and the paint spraying or plastic spraying effect can be improved particularly on a non-machined surface.
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 (8)
1. Spherical frame of nuclear magnetic resonance equipment, its characterized in that, including being hemispherical casing, the terminal surface of casing is equipped with the flange, the spherical longitude line distribution of personally submitting of casing has a plurality of first arcs, the spherical latitude line distribution of personally submitting of casing has a plurality of second arcs, and is a plurality of first arc and a plurality of the second arc will the spherical partition is a plurality of regions, and is a plurality of all seted up along shape through-hole in the region, the lateral surface of first arc is equipped with the enhancement arris that sets up along its length direction, set up on the spherical surface to the adapter sleeve that the casing outside extends, the centre of sphere of casing is located on the axis of adapter sleeve.
2. The nuclear magnetic resonance equipment spherical frame transportation tool is used for transporting the nuclear magnetic resonance equipment spherical frame according to claim 1, and is characterized by comprising a bearing bracket and a longitudinal support frame, wherein the longitudinal support frame is fixedly arranged on one side of the bearing bracket, an inclined support frame is arranged between the longitudinal support frame and the bearing bracket, a first clamping groove which is transversely arranged is formed in the longitudinal support frame, a second clamping groove which is transversely arranged is formed in the inclined support frame, the first clamping groove and the second clamping groove are used for clamping the reinforcing ribs, a plurality of positioning blocks are arranged on the upper end face of the bearing bracket at intervals and are arranged in a circumferential mode, and the connecting sleeve is clamped inside the positioning blocks.
3. The frock of claim 2, wherein a first elastic cushion layer is arranged in each of the first clamping groove and the second clamping groove, and an arc-shaped concave surface is arranged on one side of the first elastic cushion layer, which is used for contacting the reinforcing rib.
4. The tool for transporting the spherical frame of the nuclear magnetic resonance equipment according to claim 2, wherein a second elastic cushion layer is arranged on the inner side surface of the positioning block, and a cushion block is arranged on the lower portion of one side, used for contacting the connecting sleeve, of the second elastic cushion layer.
5. A process for producing a spherical cradle for nuclear magnetic resonance apparatus according to claim 1, characterized in that it comprises the following steps:
s1: modeling: taking the end face of the shell as a parting surface, arranging a whole circle of transverse runners along the outer ring of the end face, respectively arranging straight runners at opposite sides of the transverse runners, arranging a plurality of inner runners at intervals on the inner sides of the transverse runners, arranging a plurality of top risers at the top of the shell, arranging exhaust channels at the intersection of the first arc-shaped plate and the second arc-shaped plate and at the upper end of the connecting sleeve, and embedding chills at the lower part of the flange circumference, the lower part of the connecting sleeve circumference and the lower part of the intersection of the first arc-shaped plates;
s2: smelting: smelting the ductile iron made of A536Q material by using an electric furnace, discharging at 1500-1540 ℃, and performing spheroidizing inoculation by adopting a stream inoculation mode;
s3: pouring: pouring simultaneously in two straight pouring gates in a double-leakage ladle pouring mode, wherein the pouring time is not more than 15min, and pouring at least two groups of test blocks in the same furnace simultaneously;
s4: cleaning: adopting a vibrating box to shake off sand, then sequentially removing a pouring system and performing primary shot blasting treatment on the blank, and performing nondestructive testing and size measurement;
s5: and (3) heat treatment: and simultaneously placing the blank and the test block in a heat treatment furnace, heating to 550-580 ℃, preserving heat for 3-5h, cooling to 200 ℃ in the furnace, and then air-cooling to room temperature.
6. The production process of the nuclear magnetic resonance equipment spherical frame according to claim 5, characterized in that in step S1, the chilling blocks at the lower part of the flange peripheral ring and the chilling blocks at the lower part of the connecting sleeve peripheral ring are both spaced by 5-10 cm, the chilling blocks at the intersection of the plurality of first arc-shaped plates are arranged in a matrix and spaced by 5-10 cm, and chromite sand is pre-buried between the chilling blocks.
7. The process for producing a nmr spherical rack according to claim 5, wherein after step S2, the preheated stirring bar is inserted into the liquid level by more than 400mm and stirred in the same direction for at least 10 turns.
8. The process for producing a rack for nuclear magnetic resonance apparatus according to claim 5, wherein after step S5, a secondary shot blasting treatment is performed, and the diameter of the steel shot in the secondary shot blasting treatment is smaller than that in the primary shot blasting treatment.
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