CN113369384A - Manufacturing process of diaphragm type pressure gauge spring tube with overvoltage protection device - Google Patents
Manufacturing process of diaphragm type pressure gauge spring tube with overvoltage protection device Download PDFInfo
- Publication number
- CN113369384A CN113369384A CN202110635438.7A CN202110635438A CN113369384A CN 113369384 A CN113369384 A CN 113369384A CN 202110635438 A CN202110635438 A CN 202110635438A CN 113369384 A CN113369384 A CN 113369384A
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- pressure gauge
- spring
- spring tube
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- 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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
-
- 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
- B21D43/003—Positioning devices
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
-
- 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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
Abstract
The invention provides a diaphragm type pressure gauge spring tube manufacturing process with an overpressure protection device, which is used for manufacturing a spring tube in a diaphragm type pressure gauge, so that the pressure gauge can be applied to the highest pressure of more than 250MPa, therefore, the spring tube is manufactured by adopting the manufacturing process, and the manufacturing process comprises the following steps: step S1: preparing materials, and purchasing steel pipe profiles; step S2: flattening and forming, namely pressing the round pipe-shaped steel pipe profile on a pipe pressing machine into a flat elliptic shape; step S3: bending the steel pipe section into a spring pipe along a plane formed by pressing, bending the steel pipe section for at least one circle, and finally bending the spring pipe to form an included angle of 68-70 degrees at two ends of the spring pipe; step S4: annealing and stress removing; step S5: tempering and tempering; step S6: and (5) processing for later use. Through the manufacturing process, the steel pipe section is bent for at least one circle on the bending machine, so that the high-hardness steel pipe section can be applied to a diaphragm type pressure gauge, and a spring pipe in the pressure gauge is suitable for a pressure system with the pressure of more than 250 MPa.
Description
Technical Field
The invention relates to the technical field of instruments and meters, in particular to a manufacturing process of a diaphragm type pressure gauge spring tube with an overvoltage protection device.
Background
In order to improve the detection range of the pressure gauge, an overpressure protection device is usually added on the diaphragm pressure gauge, and the overpressure protection device can improve the application range of the diaphragm pressure gauge, so that the diaphragm pressure gauge can be applied to a pressure system above 250MPa, a spring tube adaptive to the overpressure protection device is used as a core part in the pressure gauge, the elastic potential energy of the spring tube determines the precision of the reading of the pressure gauge, and through the spring tube produced by the prior art, when the high-pressure gauge is applied to a pressure environment above 250MPa, the precision often cannot reach 1 level, and the high-pressure gauge cannot be applied to a high-pressure precision production system.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the high-pressure gauge in the prior art can not be applied to a high-pressure precision production system with the pressure of more than 250MPa due to the limitation of a spring tube.
The technical scheme adopted by the invention for solving the technical problems is as follows: the manufacturing process of the diaphragm type pressure gauge spring tube with the overpressure protection device comprises the following steps:
step S1: preparing materials, and purchasing steel pipe profiles;
step S2: flattening and forming on a pipe pressing machine, and pressing a round pipe-shaped steel pipe profile on the pipe pressing machine into a flat elliptic shape;
step S3: bending the steel pipe section into a spiral spring pipe by using a die, bending the steel pipe section into the spiral spring pipe along a plane formed by pressing, bending the steel pipe section for at least one circle, and finally bending the spring pipe to form an included angle of 68-70 degrees at two ends of the spring pipe;
step S4: annealing and removing stress, taking out the spring tube after heating in an annealing furnace, and carrying out air cooling on the heated spring tube;
step S5: tempering and tempering, namely adjusting the hardness of the spring tube to 35HRC to 50HRC through tempering and heat treatment;
step S6: and (4) processing for standby, and oil sealing and storing after tapping at the two ends of the spring tube.
Further, the step S1: preparing materials, and purchasing the steel pipe section further comprises: the yield strength of the steel pipe section is between 1100MPa and 1300 MPa.
Further, the step S2: flattening and forming on a tube pressing machine, pressing the round tube-shaped steel tube profile on the tube pressing machine into a flat elliptic shape, and further comprising: the steel pipe profile is processed on the pipe pressing machine through a positioning tool, the positioning tool is arranged corresponding to a pressing block of the pipe pressing machine, and the positioning tool determines the position of the steel pipe profile relative to the pipe pressing machine.
Furthermore, the positioning tool comprises a positioning block arranged corresponding to the pressing block of the pipe pressing machine, a shifting groove is formed in the pipe pressing machine, the positioning block is contained in the shifting groove in a sliding mode, and the groove bottom of the shifting groove is elastically connected to the positioning block.
Furthermore, a positioning groove is formed in the positioning block, and the steel pipe section is arranged in the positioning groove.
Furthermore, the positioning tool further comprises limiting blocks respectively arranged on two sides of the positioning block, the positioning block is clamped between the two limiting blocks, and a pressing block of the pipe pressing machine can penetrate between the two limiting blocks.
Further, use the mould with steel pipe section elbow molding, still include: and (4) bending the steel pipe section for three times, and forming a spiral coil after bending for the second time.
Further, the step S4: annealing destressing further comprises: the annealing temperature is 730 ℃ to 740 ℃, and the holding time is 30 minutes to 40 minutes.
Further, the step S5: tempering and tempering further comprises: the tempering temperature is 430-440 ℃, and the holding time is 5-10 minutes.
The invention has the advantages that in the process of producing the spring tube, the steel tube section is bent at a larger angle in the bending step, so that the spring tube can obtain larger elastic potential energy, after the spring tube is bent, the spring tube is annealed and tempered, after internal stress is removed, quenching and tempering are carried out, subsequent mechanical cutting and processing and fitter installation are convenient for the spring tube, namely, the spring tube with high hardness can be ensured to have higher elasticity by bending into a corresponding shape, and after the spring tube is assembled into a pressure gauge, the pressure gauge can be suitable for a high-pressure environment.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a flow chart of the process for manufacturing the high pressure precision spring tube of the present invention;
FIG. 2 is a schematic structural view of the spring tube of example 1 of the present invention before being flattened;
FIG. 3 is a schematic structural view of a spring tube flattened according to embodiment 1 of the present invention;
FIG. 4 is another schematic view of the flattened configuration of the spring tube shown in FIG. 3;
FIG. 5 is a schematic view of the bending process of the manufacturing process of FIG. 1;
FIG. 6 is a schematic view of the annealing destressing heating curve of FIG. 1;
FIG. 7 is a schematic structural view of the spring tube of example 2 of the present invention before being flattened;
FIG. 8 is a structural diagram illustrating the flattening of the spring tube according to embodiment 2 of the present invention;
in the figure: the manufacturing process 100, the steel pipe section 10, the pipe pressing machine 30, the positioning tool 20, the pressing block 310, the limiting block 210, the positioning block 220, the positioning groove 221, the displacement groove 320, the spring pipe 10, the guide block 230, the pressure guide block 240, the clamping block 250, the pressing block 251, the pressing groove 252 and the elastic member 260.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Example 1
As shown in FIG. 1, the present invention provides a process 100 for manufacturing a bellows of a diaphragm pressure gauge with an overpressure protection device, comprising the steps of:
step S1: preparing materials; the steel pipe section 10 made of spring steel is selected, and the yield strength of the steel pipe section 10 is preferably 400MPa to 600 MPa.
Step S2: the flattening is performed by, as shown in fig. 2 to 4, machining the cylindrical steel pipe section 10 on a tube press 30 until the steel pipe section 10 is flattened, and the shape of the steel pipe section 10 is a flat oval shape after pressing, and the cross section of the steel pipe section 10 is changed from a circular shape to a flat oval shape.
Preferably, the steel pipe profile 10 extends into the positioning tool 20 of the pipe pressing machine 30, the positioning tool 20 is disposed corresponding to the pressing block 310 of the pipe pressing machine 30, after the position of the steel pipe profile 10 relative to the pipe pressing machine 30 is determined by the positioning tool 20, the steel pipe profile 10 is pressed into a flat elliptic structure under the pressure action of the pipe pressing machine 30, and after the pressing, the cross section of the steel pipe profile 10 is in the flat elliptic structure.
Preferably, the positioning tool 20 includes limiting blocks 210 respectively disposed on two sides of a pressing block 310 on the tube press 30 and a positioning block 220 disposed between the limiting blocks 210, the positioning block 220 is disposed corresponding to the pressing block 310, a positioning groove 221 is formed on the positioning block 220, after the steel tube profile 10 is placed on the positioning groove 221, the position of the steel tube profile 10 relative to the pressing block 310 is determined, the limiting blocks 210 are respectively disposed on two sides of the steel tube profile 10 and limited by the limiting blocks 210, and the position of the positioning block 220 on the tube press 30 is fixed. After the tube press 30 is started, the steel tube profile 10 can be pressed and deformed section by section under the clamping of the pressing block 310 and the positioning block 220 until the cross section of the whole section of the steel tube profile 10 is of a waist-round structure.
Preferably, the positioning block 220 in the positioning tool 20 is detachably and elastically mounted between the two limiting blocks 210, and after being pressed by the pressing block 310, the positioning block 220 can be elastically retracted, so that a sufficient space is formed between the two limiting blocks 210, specifically, a shifting groove 320 is formed on a pressing plane of the pipe pressing machine 30, the positioning block 220 is slidably received in the shifting groove 320, and a groove bottom of the shifting groove 320 is connected to the positioning block 220 through an elastic member such as a spring, and in the pressing process of the steel pipe profile 10, the steel pipe profile 10 presses the positioning block 220, so that the positioning block 220 is retracted into the shifting groove 320, and the steel pipe profile 10 can be tiled on a platform of the pipe pressing machine 30, so as to provide a sufficient deformation space for the steel pipe profile 10.
Step S3: bending the pipe, as shown in fig. 5, bending the steel pipe section 10 in a flat oval shape on a bending machine for multiple times, and during each bending, a plane on the steel pipe section 10 is a pressing surface, that is, the steel pipe section 10 is bent along a plane direction formed by flattening, so as to ensure that the steel pipe section 10 obtains stable elastic potential energy, specifically, after the steel pipe section 10 can be bent for at least one circle, a C-shaped structure is formed between two end portions, so that the steel pipe section 10 has a pre-tightening force after breaking through a yield limit. Preferably, the steel pipe section 10 is bent for three times when being bent, after the first bending, the steel pipe section 10 forms an included angle shape with an angle of 45 ° to 90 °, after the second bending, the steel pipe section 10 forms a bending ring, an included angle shape with an angle of 90 ° to 180 ° is formed between two ends of the steel pipe section 10, and after the third bending, the included angle between the steel pipe sections 10 is further reduced until the included angle is stabilized between 68 ° to 70 °.
Step S4: annealing and stress relieving, as shown in fig. 6, after the two steps of processing, the internal structure of the steel pipe section 10 is damaged, internal stress is generated, the internal stress can promote the steel pipe section 10 to gradually recover to an initial state, the steel pipe section 10 formed by bending is placed in an annealing furnace, the section is subjected to heating treatment according to the temperature-time curve shown in the figure, namely, the temperature in the furnace is heated to 730 ℃ to 740 ℃, the steel pipe section 10 is taken out of the furnace after heat preservation for 30 minutes to 40 minutes in a high-temperature environment, the temperature is reduced to normal temperature by adopting an air cooling or air cooling mode, the internal stress generated by the steel pipe section 10 in the bending forming process is reduced to within the yield strength, and the steel pipe section 10 is shaped into the required spring pipe 10.
Step S5: tempering and tempering, namely regulating the temperature of an annealing furnace to 430-440 ℃, putting the spring tube 10 into the furnace, and keeping the temperature for 5-10 minutes until the hardness of the spring tube 10 is regulated to 35-50 HRC, and simultaneously, the elasticity of the spring tube 10 is increased to more than 250MPa, and when the spring tube 10 is applied to a high-pressure system, the spring tube 10 can be reset to an initial state under the action of the elasticity of the spring tube 10 after being pressed under high pressure.
Step S6: and (4) processing for standby, tapping the end part of the spring tube 10, and sealing the ink.
In the spring tube 10 manufactured by the process 100, the high-hardness steel tube section 10 is subjected to cold rolling at normal temperature, the cross section of the steel tube section 10 can be processed into a waist-round shape, the compressive stress of the steel tube section 10 on a bending machine can be guaranteed to be the minimum value in the subsequent bending process, then the internal stress of the spring tube 10 is eliminated through annealing heat treatment, the elasticity of the spring tube 10 is adjusted to be more than 1-level precision, and the spring tube 10 can be conveniently applied to a pressure gauge through tempering of tempering. The spring steel with high hardness and high yield strength can be applied to the manufacture of the spring tube 10, and a pressure gauge applying the spring tube 10 can be applicable to a pressure environment of 250 MPa.
Example 2
The difference between the present embodiment and embodiment 1 is that the structure of the positioning tool 20 adopted in the present embodiment is different, as shown in fig. 7 and 8, specifically, the positioning tool 20 in the present embodiment includes a guide block 230 symmetrically arranged, a pressure guide block 240 movably mounted in the guide block 230, and a clamp block 250 arranged on the pressure guide block 240.
The guide block 230 is of a hollow structure, one end of the pressure guide block 240 extends into the guide block 230 from the top end, the other end of the pressure guide block is arranged corresponding to the pressure block 310, the number of the guide blocks 230 is two, the number of the clamping blocks 250 is two, the clamping blocks 250 are arranged in a strip structure, two ends of each clamping block 250 extend into the guide blocks 230, at least two clamping blocks 250 are arranged, the clamping blocks 250 are respectively arranged at the upper end and the lower end of the steel pipe section 10, and wherein the clamping block 250 far away from the pressing block 240 is fixedly connected to the guide block 230, the end of the clamping block 250 close to the pressing block 240 is movably installed in the inner cavity of the guide block 230, the central position of the clamping block 250 is provided with symmetrical pressing blocks 251, pressing grooves 252 corresponding to the steel pipe section 10 are arranged in the pressing blocks 251, when the two pressing blocks 251 are closed, the pressing grooves 252 form a cavity into which the steel pipe section 10 is inserted, when the pressing block 251 is pressed downwards, the cavity is reduced, and the cavity wall of the cavity presses the steel pipe section 10.
Preferably, an elastic member 260 is disposed in the guide block 230, the elastic member 260 is preferably a spring in this embodiment, two ends of the elastic member 260 respectively abut against the inner wall of the guide block 230 and the end of the pressing block 250, and after the pressing block 240 and the pressing block 310 are disengaged, the pressing block 251 is reset to the initial position along the guide block 230 under the action of the elastic member 260.
When the positioning work 20 is applied, the steel pipe section 10 is inserted between the two abutting grooves 252, the abutting blocks 251 abut against the outer wall of the steel pipe section 10 through the abutting grooves 252, the pressing blocks 310 press the pressure guide blocks 240 under the continuous pressure of the pipe press, and the pressure guide blocks 240 press the steel pipe section 10, so that the steel pipe section 10 deforms in the abutting grooves 252 until the cross section is in a flat elliptical shape.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A manufacturing process of a diaphragm type pressure gauge spring tube with an overpressure protection device is characterized by comprising the following steps:
step S1: preparing materials, and purchasing steel pipe profiles;
step S2: flattening and forming on a pipe pressing machine, and pressing a round pipe-shaped steel pipe profile on the pipe pressing machine into a flat elliptic shape;
step S3: bending the steel pipe section into a spiral spring pipe by using a die, bending the steel pipe section into the spiral spring pipe along a plane formed by pressing, bending the steel pipe section for at least one circle, and finally bending the spring pipe to form an included angle of 68-70 degrees at two ends of the spring pipe;
step S4: annealing and removing stress, taking out the spring tube after heating in an annealing furnace, and carrying out air cooling on the heated spring tube;
step S5: tempering and tempering, namely adjusting the hardness of the spring tube to 35HRC to 50HRC through tempering and heat treatment;
step S6: and (4) processing for standby, and oil sealing and storing after tapping at the two ends of the spring tube.
2. The process for manufacturing the spring tube of the diaphragm pressure gauge with the overpressure protection device as claimed in claim 1, wherein: the step S1: preparing materials, and purchasing the steel pipe section further comprises: the yield strength of the steel pipe section is between 1100MPa and 1300 MPa.
3. The process for manufacturing the spring tube of the diaphragm pressure gauge with the overpressure protection device as claimed in claim 1, wherein: the step S2: flattening and forming on a tube pressing machine, pressing the round tube-shaped steel tube profile on the tube pressing machine into a flat elliptic shape, and further comprising: the steel pipe profile is processed on the pipe pressing machine through a positioning tool, the positioning tool is arranged corresponding to a pressing block of the pipe pressing machine, and the positioning tool determines the position of the steel pipe profile relative to the pipe pressing machine.
4. The process for manufacturing the spring tube of the diaphragm type pressure gauge with the overpressure protection device as claimed in claim 3, wherein: the positioning tool comprises a positioning block arranged corresponding to a pressing block of the pipe pressing machine, a shifting groove is formed in the pipe pressing machine, the positioning block is contained in the shifting groove in a sliding mode, and the bottom of the shifting groove is elastically connected to the positioning block.
5. The process for manufacturing the spring tube of the diaphragm pressure gauge with the overpressure protection device as claimed in claim 4, wherein: the positioning block is provided with a positioning groove, and the steel pipe section is arranged in the positioning groove.
6. The process for manufacturing the spring tube of the diaphragm pressure gauge with the overpressure protection device as claimed in claim 4, wherein: the positioning tool further comprises limiting blocks arranged on two sides of the positioning block respectively, the positioning block is clamped between the two limiting blocks, and a pressing block of the pipe pressing machine can penetrate between the two limiting blocks.
7. The process for manufacturing the spring tube of the diaphragm pressure gauge with the overpressure protection device as claimed in claim 1, wherein: use the mould with steel pipe section elbow molding, still include: and (4) bending the steel pipe section for three times, and forming a spiral coil after bending for the second time.
8. The process for manufacturing the spring tube of the diaphragm pressure gauge with the overpressure protection device as claimed in claim 1, wherein: the step S4: annealing destressing further comprises: the annealing temperature is 730 ℃ to 740 ℃, and the holding time is 30 minutes to 40 minutes.
9. The process for manufacturing the spring tube of the diaphragm pressure gauge with the overpressure protection device as claimed in claim 1, wherein: the step S5: tempering and tempering further comprises: the tempering temperature is 430-440 ℃, and the holding time is 5-10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110635438.7A CN113369384A (en) | 2021-06-08 | 2021-06-08 | Manufacturing process of diaphragm type pressure gauge spring tube with overvoltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110635438.7A CN113369384A (en) | 2021-06-08 | 2021-06-08 | Manufacturing process of diaphragm type pressure gauge spring tube with overvoltage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113369384A true CN113369384A (en) | 2021-09-10 |
Family
ID=77576352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110635438.7A Pending CN113369384A (en) | 2021-06-08 | 2021-06-08 | Manufacturing process of diaphragm type pressure gauge spring tube with overvoltage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113369384A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825150A (en) * | 2010-03-30 | 2010-09-08 | 扬州市迅达碟形弹簧厂 | Bend-plate spring and making method thereof |
| CN105396918A (en) * | 2015-10-22 | 2016-03-16 | 浙江大学宁波理工学院 | Production method, forming device and coiling machine for spiral spring buffer tube of pressure gauge |
| JP2016204682A (en) * | 2015-04-16 | 2016-12-08 | フランスベッド株式会社 | Tempering device of spring body and manufacturing device of spring body |
| CN207127110U (en) * | 2017-09-19 | 2018-03-23 | 江苏美翔体育用品有限公司 | A kind of trampoline guardrail pipe pressure pipe forming frock |
| CN207407945U (en) * | 2017-11-01 | 2018-05-25 | 苏州众力仪表有限公司 | A kind of bourdon tube of gas meter, flow meter |
| CN109236909A (en) * | 2018-10-17 | 2019-01-18 | 罗永江 | A kind of flat wire support bullet spring and preparation method thereof |
-
2021
- 2021-06-08 CN CN202110635438.7A patent/CN113369384A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825150A (en) * | 2010-03-30 | 2010-09-08 | 扬州市迅达碟形弹簧厂 | Bend-plate spring and making method thereof |
| JP2016204682A (en) * | 2015-04-16 | 2016-12-08 | フランスベッド株式会社 | Tempering device of spring body and manufacturing device of spring body |
| CN105396918A (en) * | 2015-10-22 | 2016-03-16 | 浙江大学宁波理工学院 | Production method, forming device and coiling machine for spiral spring buffer tube of pressure gauge |
| CN207127110U (en) * | 2017-09-19 | 2018-03-23 | 江苏美翔体育用品有限公司 | A kind of trampoline guardrail pipe pressure pipe forming frock |
| CN207407945U (en) * | 2017-11-01 | 2018-05-25 | 苏州众力仪表有限公司 | A kind of bourdon tube of gas meter, flow meter |
| CN109236909A (en) * | 2018-10-17 | 2019-01-18 | 罗永江 | A kind of flat wire support bullet spring and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10252930B2 (en) | Bent glass plate for optical use and fabrication method thereof | |
| CN101838730B (en) | Reversible deformation correcting method for elliptical gear ring subjected to deformation after carburization | |
| JP2011073059A (en) | Method of manufacturing metallic double pipe | |
| JP2012219931A (en) | Rack bar and method of manufacturing the same | |
| CN101168795A (en) | Carburization quenching method for round hole thin wall work-piece | |
| US20060230807A1 (en) | Creep forming a work piece | |
| CN108435999B (en) | A kind of titanium alloy ring forging anti-deformation forging technology | |
| CN107443019A (en) | The warm cold duplex forging manufacturing process of deep hole input shaft | |
| CN107812801B (en) | Method for processing metal corrugated pipe | |
| CN102773307B (en) | Forming process of parallel three-way connector | |
| CN113369384A (en) | Manufacturing process of diaphragm type pressure gauge spring tube with overvoltage protection device | |
| CN108251608A (en) | A kind of high-temperature bearing steel bearings lasso shaping processing method | |
| JP2012066279A (en) | Method for producing bearing race | |
| CN103878245B (en) | A kind of bending machine die of round piece | |
| CN100391648C (en) | Method for manufacturing oil pipe in external upset | |
| CN110475626B (en) | Hollow stabilizer, stabilizer manufacturing device and hollow stabilizer manufacturing method | |
| JP5333401B2 (en) | Metal double pipe manufacturing method | |
| CN101767139A (en) | Stroke processing method of ultrathin cylinder stainless steel tube film for printer and duplicator | |
| CN111644506B (en) | Female die assembly for punching thin annular tooth-shaped piece and preparation method thereof | |
| JP4854548B2 (en) | High-pressure fuel injection pipe having a connecting head and a bent portion and method for manufacturing the same | |
| CN112981082A (en) | Heat treatment method of full-hardened withdrawal and straightening roller and full-hardened withdrawal and straightening roller | |
| MX2022005769A (en) | Hot stamp tooling assembly and method of forming a part with tailored temper properties. | |
| CN111673394A (en) | Production process of e-shaped elastic strip | |
| SU1375391A1 (en) | Method of producing metal hollow stepped articles from tubular billets | |
| CN101791649A (en) | Die for differential-temperature drawing and straightening processing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |