CN114192634A - Stainless steel intermediate frequency induction heating push elbow forming process - Google Patents
Stainless steel intermediate frequency induction heating push elbow forming process Download PDFInfo
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- CN114192634A CN114192634A CN202210072269.5A CN202210072269A CN114192634A CN 114192634 A CN114192634 A CN 114192634A CN 202210072269 A CN202210072269 A CN 202210072269A CN 114192634 A CN114192634 A CN 114192634A
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- Prior art keywords
- elbow
- stainless steel
- induction heating
- heating coil
- steel pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/04—Bending tubes using mandrels or the like the mandrel being rigid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
- B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
- B21D45/04—Ejecting devices interrelated with motion of tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/16—Auxiliary equipment, e.g. machines for filling tubes with sand
- B21D9/18—Auxiliary equipment, e.g. machines for filling tubes with sand for heating or cooling of bends
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L43/00—Bends; Siphons
- F16L43/001—Bends; Siphons made of metal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses a forming process of stainless steel intermediate frequency induction heating push elbow, which adopts intermediate frequency induction heating push technology, the diameter of a selected material is 0.63-0.77 times of the diameter of the elbow, the diameter of the selected material is reduced, the smaller the diameter of the material is, the lower the price is, the material consumption is reduced, and the manufacturing cost is saved, the induction heating coil of the invention adopts a structure that the diameter is increased from a small diameter by following a mandrel, the winding density is large, the gap between the induction heating coil and a pipe blank is small, the heating speed is accelerated by adjusting the structure of the induction heating coil, the heating temperature is improved, the refractory fiber cotton is adopted to cover the induction heating coil, the heat loss is reduced, the heating temperature is better, the stainless steel elbow can be better suitable for processing the stainless steel elbow, the invention adopts a conveying roller conveying mode, and can ensure that the stainless steel pipe is smoother in the feeding process under the guiding action of the conveying roller, compared with the prior transverse cold-pushing efficiency, the transverse cold-pushing efficiency is obviously improved.
Description
Technical Field
The invention relates to the technical field of elbow processing of industrial pipe fittings, in particular to a stainless steel intermediate frequency induction heating push elbow forming process.
Background
In the last decade, the industry of stainless steel pipe fittings has developed very rapidly, stainless steel pipe fittings are more and more favored in life and industrial application with their environmental protection safety, and play an important and irreplaceable role, in the pipeline system, the elbow is a pipe fitting for changing the direction of the pipeline, and plays an irreplaceable role in the pipeline system, and the stainless steel elbow is one of the stainless steel pipe fittings manufactured by stainless steel materials.
The stainless steel elbow has excellent corrosion resistance, and the thin and consolidated oxide film on the surface of the stainless steel enables the stainless steel to have excellent corrosion resistance in all water qualities, and also has excellent corrosion resistance even if buried, so that the stainless steel elbow is suitable for various water qualities, does not need to control the water quality except disinfection and sterilization, does not have corrosive and excessive exudates, can maintain the water quality to be pure and sanitary, can completely prevent secondary pollution, and can be saturated with high water flow impact of up to 30 meters per second.
However, the existing elbow processing technology is transverse cold-push forming, the steel pipe with the same diameter as the elbow is used as a raw material for the transverse cold-push forming, the material selection diameter of the processing technology is required to be the same as the diameter of the elbow, the material consumption is large, the material purchase price is high, and the existing elbow processing technology has poor stainless steel processing effect, narrow application range and poor use effect.
Disclosure of Invention
The invention aims to provide a stainless steel intermediate frequency induction heating push elbow forming process to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a stainless steel intermediate frequency induction heating pushing elbow forming process comprises a rack, a stainless steel pipe, an elbow core rod mold, an induction heating coil and an electromagnetic heating variable frequency controller, wherein a conveying roller is installed on the rack, the stainless steel pipe is arranged on the conveying roller, the elbow core rod mold is arranged in the stainless steel pipe, a fixing plate is installed at one end of the rack, mechanical calipers are installed at the middle position of the fixing plate, electric telescopic rods are installed on the two sides of the mechanical calipers on the fixing plate, a push plate is installed at the piston end of each electric telescopic rod, the induction heating coil is arranged outside the bent pipe of the stainless steel pipe and electrically connected with the electromagnetic heating variable frequency controller arranged on one side of the rack, a cooling pool is correspondingly arranged above and below the induction heating coil on the ground at one end of the rack, baffle supporting steel frames are welded on the two sides of one end, close to the induction heating coil, of the rack, and the baffle supporting steel frame is provided with a baffle.
As a further scheme of the invention: the inner diameter of the induction heating coil is larger than the outer diameter of the bent pipe of the stainless steel pipe, and gaps are reserved around the induction heating coil and the stainless steel pipe.
As a still further scheme of the invention: and refractory cellucotton is paved on the induction heating coil.
A stainless steel intermediate frequency induction heating push elbow forming process comprises the following steps:
step 1: blanking, namely firstly controlling the blanking size, selecting a stainless steel pipe with the diameter of 0.63-0.77 times of the diameter of the elbow, placing the stainless steel pipe on a rack, pushing one end of the stainless steel pipe to penetrate through and be sleeved outside an elbow core rod die, then abutting the straight end of the elbow core rod die on a fixed plate, clamping the straight end of the elbow core rod die through a mechanical caliper, and then cutting the surface of the stainless steel pipe at equal intervals by adopting a sawing machine;
step 2: heating the tube blank, then pushing the stainless steel tube to move towards a heating end through an electric telescopic rod, starting an electromagnetic heating variable frequency controller to control an induction heating coil to be electrified, and heating the tube blank outside an elbow core rod die by the induction heating coil to perform high-temperature heating so that the tube blank is softened;
and step 3: pushing, namely continuously pushing the stainless steel pipe through an electric telescopic rod, and reasonably controlling the pushing speed to enable the stainless steel pipe to smoothly pass through the elbow end of the elbow core rod die;
and 4, step 4: measuring the temperature, wherein in the pushing process, a person stands on one side to hold the temperature measuring device to measure the highest temperature of the central part of the elbow;
and 5: demoulding, wherein the heated stainless steel elbow can be separated from the elbow core rod mould under the action of gravity along with the pushing process and falls into a cooling pool for water cooling;
step 6: and (4) detecting, after cooling, hanging out the pushed elbow semi-finished product through a hook bound with a steel wire rope, and performing qualified detection on the pushed elbow semi-finished product.
As a still further scheme of the invention: the pushing speed is controlled to be 70mm/min to 100mm/min
As a still further scheme of the invention: the temperature measuring temperature is not lower than 900 ℃.
As a still further scheme of the invention: the heating temperature of the pipe blank is not lower than 900 ℃, the induction heating coil adopts a structure that the diameter is increased from a small diameter by following the mandrel, the winding density is large, the gap between the induction heating coil and the pipe blank is small, the heating speed of the elbow is increased, and the heating temperature is increased.
As a still further scheme of the invention: the qualified detection contents comprise parameters such as the outer diameter of the elbow, the wall thickness of the elbow, the bending radius of the elbow, the appearance quality of the elbow, the ovality of the elbow and the like.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the intermediate frequency induction heating pushing technology, the diameter of the selected material is 0.63-0.77 times of the diameter of the elbow, the diameter of the selected material is reduced, the smaller the diameter of the material is, the lower the price is, the material consumption is reduced, and the manufacturing cost is saved.
2. The induction heating coil adopts a structure that the diameter of the core rod is increased from a small diameter by following the core rod, the winding density is large, the gap between the core rod and a pipe blank is small, the heating speed is increased by adjusting the structure of the induction heating coil, the heating temperature is increased, the refractory fiber cotton is adopted to cover the induction heating coil, the heat loss is reduced, the heating temperature is better, and the stainless steel elbow can be better suitable for processing.
3. The invention adopts a conveying roller conveying mode, can enable the stainless steel tube to be smoother in the feeding process under the guiding action of the conveying roller, and obviously improves the transverse cold pushing efficiency compared with the prior art.
Drawings
Fig. 1 is a side view of a stainless steel intermediate frequency induction heating push elbow forming process.
Fig. 2 is a top view of a stainless steel intermediate frequency induction heating push bend forming process.
FIG. 3 is a sectional view of a stainless steel pipe in a process of forming a stainless steel intermediate frequency induction heating push elbow
1. A frame; 2. a conveying roller; 3. a stainless steel tube; 4. an elbow core rod die; 5. a fixing plate; 6. an electric telescopic rod; 7. pushing the plate; 8. an induction heating coil; 9. an electromagnetic heating variable frequency controller; 10. refractory cellucotton; 11. a cooling pool; 12. the baffle supports the steel frame; 13. a baffle plate; 14. a mechanical caliper.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, in the embodiment of the present invention, a stainless steel intermediate frequency induction heating push elbow forming process includes a frame 1, a stainless steel pipe 3, an elbow mandrel mold 4, an induction heating coil 8 and an electromagnetic heating frequency conversion controller 9, wherein a conveying roller 2 is installed on the frame 1, the conveying roller 2 can improve the movement flexibility of the stainless steel pipe 3 to enable an elbow to be processed more smoothly, the conveying roller 2 is provided with the stainless steel pipe 3, the elbow mandrel mold 4 is disposed in the stainless steel pipe 3, a fixing plate 5 is installed at one end of the frame 1, a mechanical caliper 14 is installed at a middle position of the fixing plate 5, electric telescopic rods 6 are installed at two sides of the mechanical caliper 14 on the fixing plate 5, a push plate 7 is installed at a piston end of the electric telescopic rods 6, the push plate 7 is driven by the electric telescopic rods 6 to move the stainless steel pipe 3 relative to the elbow mandrel mold 4, so that the stainless steel pipe 3 is bent and deformed through an elbow part at the front end of the elbow mandrel mold 4, stainless steel pipe 3's return bend department outside is provided with induction heating coil 8, induction heating coil 8 and the 9 electric connection of electromagnetic heating frequency conversion controller who sets up in frame 1 one side, the subaerial cooling bath 11 that is provided with induction heating coil 8 correspondence from top to bottom of one end of frame 1, the one end both sides welding that is close to induction heating coil 8 in frame 1 has baffle support steelframe 12, install baffle 13 on the baffle support steelframe 12, baffle 13 can play the side direction safeguard function, avoid the staff to touch induction heating coil 8 and the elbow of high temperature and cause personnel to scald.
The inner diameter of the induction heating coil 8 is larger than the outer diameter of the bent pipe of the stainless steel pipe 3, gaps are reserved around the induction heating coil 8 and the stainless steel pipe 3, and the induction heating coil 8 and the stainless steel pipe 3 can be prevented from being directly contacted with the induction heating coil 8 and being bonded to the stainless steel pipe 3 to affect use through the arrangement of the gaps.
8 upper berths of induction heating coil are equipped with the refractory fiber cotton 10, and the refractory fiber cotton 10 can reduce heat and run off for heating temperature is better, and the adaptation that can be better is to the processing of stainless steel elbow.
A stainless steel intermediate frequency induction heating push elbow forming process comprises the following process flows;
firstly, controlling the blanking size, selecting a stainless steel pipe 3 with the diameter of 0.63-0.77 times of the diameter of an elbow, placing the stainless steel pipe 3 on a rack 1, pushing one end of the stainless steel pipe 3 to be sleeved outside an elbow core rod mold 4 in a penetrating manner, then abutting the straighter end of the elbow core rod mold 4 on a fixed plate 5, clamping the straighter end through a mechanical caliper 14, and then cutting the surface of the stainless steel pipe 3 at equal intervals by adopting a sawing machine;
then the stainless steel pipe 3 is pushed to move towards the heating end through the electric telescopic rod 6, the electromagnetic heating variable frequency controller 9 is started to control the induction heating coil 8 to be electrified, the induction heating coil 8 generates heat to heat the pipe blank outside the elbow mandrel mould 4 at a high temperature, so that the pipe blank is softened, the heating temperature of the pipe blank is not lower than 900 ℃, the induction heating coil 8 adopts a structure that the diameter of the pipe blank is increased from a small diameter to a large diameter by following the mandrel, the winding density is large, the gap between the pipe blank and the coil is small, the heating speed of the elbow is accelerated, and the heating temperature is increased;
then continuously pushing the stainless steel pipe 3 through the electric telescopic rod 6, and reasonably controlling the pushing speed to enable the stainless steel pipe 3 to smoothly pass through the elbow end of the elbow core rod die 4, wherein when the heated stainless steel pipe 3 passes through the elbow end of the elbow core rod die 4, the pipe blank can automatically bend and deform and the diameter can gradually expand, the pushing speed is controlled to be 70mm/min to 100mm/min, in the pushing process, a worker stands on one side to hold a temperature measuring device to measure the highest temperature of the central part of the elbow, and the temperature measuring temperature is not lower than 900 ℃;
and finally, the heated stainless steel elbow can be separated from the elbow mandrel mould 4 under the action of gravity and falls into the cooling pool 11 for water cooling, after cooling is finished, the pushed elbow semi-finished product is lifted out through the hook bound with the steel wire rope, and qualified detection is carried out on the pushed elbow semi-finished product, wherein the qualified detection contents comprise parameters such as the elbow outer diameter, the elbow wall thickness, the elbow bending radius, the elbow appearance quality and the elbow ellipticity.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a stainless steel intermediate frequency induction heating pushes away system elbow forming process, includes frame (1), stainless steel pipe (3), elbow plug mould (4), induction heating coil (8) and electromagnetic heating frequency conversion controller (9), its characterized in that: the automatic feeding device is characterized in that a conveying roller (2) is installed on a rack (1), a stainless steel pipe (3) is arranged on the conveying roller (2), an elbow mandrel mold (4) is arranged in the stainless steel pipe (3), a fixing plate (5) is installed at one end of the rack (1), mechanical calipers (14) are installed at the middle position of the fixing plate (5), electric telescopic rods (6) are installed on the two sides of the mechanical calipers (14) on the fixing plate (5), a push plate (7) is installed at the piston end of each electric telescopic rod (6), an induction heating coil (8) is arranged outside the bent pipe of the stainless steel pipe (3), the induction heating coil (8) is electrically connected with an electromagnetic heating variable-frequency controller (9) arranged on one side of the rack (1), and a cooling pool (11) is correspondingly arranged on the ground at one end of the rack (1) and above and below the induction heating coil (8), baffle support steelframe (12) have been welded to the one end both sides that are close to induction heating coil (8) on frame (1), baffle support steelframe (12) is last to be installed baffle (13).
2. The forming process of the stainless steel intermediate frequency induction heating push elbow according to claim 1, characterized in that: the inner diameter of the induction heating coil (8) is larger than the outer diameter of the bent pipe of the stainless steel pipe (3), and gaps are reserved around the induction heating coil (8) and the stainless steel pipe (3).
3. The forming process of the stainless steel intermediate frequency induction heating push elbow according to claim 1, characterized in that: refractory fiber cotton (10) is paved on the induction heating coil (8).
4. The forming process of stainless steel intermediate frequency induction heating push elbow according to claim 1, comprising the following steps:
step 1: blanking, firstly, controlling the blanking size, selecting a stainless steel pipe (3) with the diameter of 0.63-0.77 times of the diameter of an elbow, placing the stainless steel pipe (3) on a rack (1), pushing one end of the stainless steel pipe (3) to penetrate and be sleeved outside an elbow core rod die (4), then abutting the straighter end of the elbow core rod die (4) on a fixing plate (5), clamping the straighter end through a mechanical caliper (14), and then cutting the surface of the stainless steel pipe (3) at equal intervals by adopting a sawing machine;
step 2: heating the tube blank, then pushing the stainless steel tube (3) to move towards a heating end through an electric telescopic rod (6), starting an electromagnetic heating variable frequency controller (9) to control an induction heating coil (8) to be electrified, and heating the tube blank outside the elbow core rod die (4) by the induction heating coil (8) to heat the tube blank at a high temperature so as to soften the tube blank;
and step 3: pushing, namely continuously pushing the stainless steel pipe (3) through an electric telescopic rod (6), and reasonably controlling the pushing speed to enable the stainless steel pipe (3) to smoothly pass through the elbow end of the elbow core rod die (4), wherein when the heated stainless steel pipe (3) passes through the elbow end of the elbow core rod die (4), the pipe blank can be automatically bent and deformed, and the diameter can be gradually enlarged;
and 4, step 4: measuring the temperature, wherein in the pushing process, a person stands on one side to hold the temperature measuring device to measure the highest temperature of the central part of the elbow;
and 5: demoulding, wherein the heated stainless steel elbow can be separated from the elbow core rod mould (4) under the action of gravity along with the pushing process and falls into a cooling pool (11) for water cooling;
step 6: and (4) detecting, after cooling, hanging out the pushed elbow semi-finished product through a hook bound with a steel wire rope, and performing qualified detection on the pushed elbow semi-finished product.
5. The forming process of the stainless steel intermediate frequency induction heating push elbow according to claim 4, characterized in that: the pushing speed is controlled to be 70mm/min to 100 mm/min.
6. The forming process of the stainless steel intermediate frequency induction heating push elbow according to claim 4, characterized in that: the temperature measuring temperature is not lower than 900 ℃.
7. The forming process of the stainless steel intermediate frequency induction heating push elbow according to claim 4, characterized in that: the heating temperature of the tube blank is not lower than 900 ℃, the induction heating coil (8) adopts a structure that the diameter is increased from a small diameter by following the mandrel, the winding density is large, the gap between the induction heating coil and the tube blank is small, the heating speed of the elbow is increased, and the heating temperature is increased.
8. The forming process of the stainless steel intermediate frequency induction heating push elbow according to claim 1, characterized in that: the qualified detection contents comprise parameters such as the outer diameter of the elbow, the wall thickness of the elbow, the bending radius of the elbow, the appearance quality of the elbow, the ovality of the elbow and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210072269.5A CN114192634A (en) | 2022-01-21 | 2022-01-21 | Stainless steel intermediate frequency induction heating push elbow forming process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210072269.5A CN114192634A (en) | 2022-01-21 | 2022-01-21 | Stainless steel intermediate frequency induction heating push elbow forming process |
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| Publication Number | Publication Date |
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| CN114192634A true CN114192634A (en) | 2022-03-18 |
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| CN202210072269.5A Pending CN114192634A (en) | 2022-01-21 | 2022-01-21 | Stainless steel intermediate frequency induction heating push elbow forming process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114433680A (en) * | 2022-04-11 | 2022-05-06 | 华博管业有限公司 | Nondestructive forming process for stainless steel elbow pipe fitting |
| CN115301785A (en) * | 2022-10-09 | 2022-11-08 | 河北沧海核装备科技股份有限公司 | High-frequency heating pushing forming process and equipment for stainless steel seamless elbow |
| CN115356971A (en) * | 2022-10-14 | 2022-11-18 | 江苏新恒基特种装备股份有限公司 | System and method for accurately monitoring and controlling heating and adjusting process of intermediate-frequency bent pipe |
| CN115815392A (en) * | 2023-02-08 | 2023-03-21 | 河北沧海核装备科技股份有限公司 | High-frequency electromagnetic induction heating pushing stainless steel elbow forming process and equipment thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114433680A (en) * | 2022-04-11 | 2022-05-06 | 华博管业有限公司 | Nondestructive forming process for stainless steel elbow pipe fitting |
| CN115301785A (en) * | 2022-10-09 | 2022-11-08 | 河北沧海核装备科技股份有限公司 | High-frequency heating pushing forming process and equipment for stainless steel seamless elbow |
| CN115301785B (en) * | 2022-10-09 | 2023-01-06 | 河北沧海核装备科技股份有限公司 | High-frequency heating and pushing forming process and equipment for stainless steel seamless elbow |
| CN115356971A (en) * | 2022-10-14 | 2022-11-18 | 江苏新恒基特种装备股份有限公司 | System and method for accurately monitoring and controlling heating and adjusting process of intermediate-frequency bent pipe |
| CN115815392A (en) * | 2023-02-08 | 2023-03-21 | 河北沧海核装备科技股份有限公司 | High-frequency electromagnetic induction heating pushing stainless steel elbow forming process and equipment thereof |
| WO2024164938A1 (en) * | 2023-02-08 | 2024-08-15 | 河北沧海核装备科技股份有限公司 | Process and apparatus for forming stainless steel elbow by means of high-frequency electromagnetic induction heating and pushing |
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