CN113770198A - Processing technology of measuring tube of mass flowmeter - Google Patents
Processing technology of measuring tube of mass flowmeter Download PDFInfo
- Publication number
- CN113770198A CN113770198A CN202111069735.6A CN202111069735A CN113770198A CN 113770198 A CN113770198 A CN 113770198A CN 202111069735 A CN202111069735 A CN 202111069735A CN 113770198 A CN113770198 A CN 113770198A
- Authority
- CN
- China
- Prior art keywords
- pipe
- namely
- bent
- bending
- mass flowmeter
- 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
- 238000005516 engineering process Methods 0.000 title claims abstract description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000007493 shaping process Methods 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
-
- 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
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/30—Finishing tubes, e.g. sizing, burnishing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The invention relates to a processing technology of a measuring tube of a mass flowmeter, which comprises the steps of blanking, filling liquid tin, cooling, forming, heating, cleaning, shaping and cutting, and the measuring tube of the mass flowmeter with high precision and high cost performance is obtained by processing.
Description
Technical Field
The invention relates to the technical field of measuring pipe processing, in particular to a processing technology of a measuring pipe of a mass flowmeter.
Background
A mass flow meter is an instrument for detecting the mass flow of a fluid in a pipe. The measuring tube is the most important part of the mass flow meter, the design and production process of the measuring tube are related to the precision and stability of the whole mass flow meter, and the mass flow meter on the market has many shapes including a U shape, a straight tube shape, an annular shape, an S shape and the like, wherein the U shape is the most common shape.
The U-shaped measuring pipe can be formed by direct cold bending of a pipe bending machine, but the bent part of the measuring pipe manufactured by the common pipe bending machine has obvious drawing marks, has higher technical requirements on workers, is difficult to meet the design requirements in the aspect of precision control, and is a high-precision full-automatic numerical control pipe bending machine which is very expensive.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a processing technology of a measuring tube of a mass flowmeter, which has high cost performance and ensures precision, aiming at the defects of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a processing technology of a measuring pipe of a mass flowmeter is characterized by comprising the following steps:
the first step is as follows: blanking, namely selecting a straight pipe;
the second step is that: filling liquid tin, namely filling the liquid tin after one end of the straight pipe is blocked;
the third step: cooling, namely cooling at normal temperature;
the fourth step: forming, namely, winding and bending a straight pipe on a U-shaped pipe bending die, and fixing the straight pipe on the U-shaped pipe bending die by using a fixing tool to obtain a bent pipe;
the fifth step: heating, namely suspending the U-shaped pipe bending mould in a high-temperature box and heating until all liquid tin in the pipe bending flows out;
and a sixth step: cleaning, namely cleaning the tin slag in the bent pipe by using a pipeline steel brush;
the seventh step: shaping, namely placing the bent pipe in a shaping die, pressing a plurality of steel balls with the diameter equal to the pipe diameter of the bent pipe into the bent pipe by using a hydraulic press, taking out the steel balls, and circularly reciprocating;
eighth step: and cutting the redundant straight pipe parts to obtain a finished measuring pipe.
The present invention having the above features: the length of the straight pipe obtained by blanking is larger than the expanded length of the required measuring pipe, and space is left for later adjustment; pouring liquid tin into the straight pipe to soften the straight pipe so as to facilitate the operation of the subsequent forming step; and then the solidified tin is melted by heating in a high-temperature box to flow out, so that the obtained bent pipe cannot meet the requirements on the aspects of the roundness, the flatness and the like of the bent pipe, the steel ball is used for shaping the inside of the bent pipe through the shaping step, and when the steel ball can flexibly roll in the pipe without a hydraulic press, the shaping process is completed.
The invention further comprises the following steps: the temperature in the high-temperature box is set to be 233-240 ℃, and the heating time is 11-30 min.
The present invention having the above features: the temperature in the high temperature box must be set higher than the melting point of tin, and the time required for the tin to be completely melted ranges from 11min to 30 min.
Drawings
FIG. 1 is a schematic view of a measuring tube according to the present invention.
Detailed Description
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
The invention provides a processing technology of a measuring pipe of a mass flowmeter, which is characterized by comprising the following steps:
the first step is as follows: blanking, namely selecting a straight pipe;
the second step is that: filling liquid tin, namely filling the liquid tin after one end of the straight pipe is blocked;
the third step: cooling, namely cooling at normal temperature;
the fourth step: forming, namely, winding and bending a straight pipe on a U-shaped pipe bending die, and fixing the straight pipe on the U-shaped pipe bending die by using a fixing tool to obtain a bent pipe;
the fifth step: and (3) heating, namely hanging the U-shaped pipe bending die in a high-temperature box and heating until all liquid tin in the pipe bending flows out, wherein the set temperature in the high-temperature box is 233-240 ℃, and the heating time is 11-30 min.
And a sixth step: cleaning, namely cleaning the tin slag in the bent pipe by using a pipeline steel brush;
the seventh step: shaping, namely placing the bent pipe in a shaping die, pressing a plurality of steel balls with the diameter equal to the pipe diameter of the bent pipe into the bent pipe by using a hydraulic press, taking out the steel balls, and circularly reciprocating;
eighth step: and cutting the redundant straight pipe parts to obtain a finished measuring pipe.
The following table shows the comparison of the respective values of the measuring tube produced by the process according to the invention with those of the measuring tube produced by the conventional process:
| ordinary pipe bending process | The process of the invention | |
| Roundness of the circumferential bent part | <0.007D | <0.004D |
| Degree of flatness | <0.005R | <0.0007R |
| Depth of pull mark | <0.002D | <0.001D |
| Center to center distance tolerance | ±0.001R | ±0.0005R |
Claims (2)
1. A processing technology of a measuring pipe of a mass flowmeter is characterized by comprising the following steps:
the first step is as follows: blanking, namely selecting a straight pipe;
the second step is that: filling liquid tin, namely filling the liquid tin after one end of the straight pipe is blocked;
the third step: cooling, namely cooling at normal temperature;
the fourth step: forming, namely, winding and bending a straight pipe on a U-shaped pipe bending die, and fixing the straight pipe on the U-shaped pipe bending die by using a fixing tool to obtain a bent pipe;
the fifth step: heating, namely suspending the U-shaped pipe bending mould in a high-temperature box and heating until all liquid tin in the pipe bending flows out;
and a sixth step: cleaning, namely cleaning the tin slag in the bent pipe by using a pipeline steel brush;
the seventh step: shaping, namely placing the bent pipe in a shaping die, pressing a plurality of steel balls with the diameter equal to the pipe diameter of the bent pipe into the bent pipe by using a hydraulic press, taking out the steel balls, and circularly reciprocating;
eighth step: and cutting the redundant straight pipe parts to obtain a finished measuring pipe.
2. A process of manufacturing a measurement tube of a mass flowmeter according to claim 1, wherein: the temperature in the high-temperature box is set to be 233-240 ℃, and the heating time is 11-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069735.6A CN113770198A (en) | 2021-09-13 | 2021-09-13 | Processing technology of measuring tube of mass flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069735.6A CN113770198A (en) | 2021-09-13 | 2021-09-13 | Processing technology of measuring tube of mass flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113770198A true CN113770198A (en) | 2021-12-10 |
Family
ID=78843222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111069735.6A Pending CN113770198A (en) | 2021-09-13 | 2021-09-13 | Processing technology of measuring tube of mass flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113770198A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086160A (en) * | 1992-10-30 | 1994-05-04 | 姜德球 | Method for manufacturing bent pipe |
| JPH07265962A (en) * | 1994-03-30 | 1995-10-17 | Hirano Seisakusho:Kk | Method for bending metallic pipe |
| DE10045849A1 (en) * | 2000-09-14 | 2002-03-28 | Flowtec Ag | Method for bending a pipe for use in a Coriolis mass flowmeter, in which a flexible support body is placed in the pipe which is then filled with wax, etc. prior to bending in a mold, so that more accurate results are achieved |
| CN106756419A (en) * | 2015-11-23 | 2017-05-31 | 宁波思明汽车科技股份有限公司 | The preparation method of automobile bend pipe |
| CN109128698A (en) * | 2018-08-23 | 2019-01-04 | 贵州永红航空机械有限责任公司 | A kind of processing method and portable tooling of thin-walled small diameter tube high temperature alloy pipe |
-
2021
- 2021-09-13 CN CN202111069735.6A patent/CN113770198A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086160A (en) * | 1992-10-30 | 1994-05-04 | 姜德球 | Method for manufacturing bent pipe |
| JPH07265962A (en) * | 1994-03-30 | 1995-10-17 | Hirano Seisakusho:Kk | Method for bending metallic pipe |
| DE10045849A1 (en) * | 2000-09-14 | 2002-03-28 | Flowtec Ag | Method for bending a pipe for use in a Coriolis mass flowmeter, in which a flexible support body is placed in the pipe which is then filled with wax, etc. prior to bending in a mold, so that more accurate results are achieved |
| CN106756419A (en) * | 2015-11-23 | 2017-05-31 | 宁波思明汽车科技股份有限公司 | The preparation method of automobile bend pipe |
| CN109128698A (en) * | 2018-08-23 | 2019-01-04 | 贵州永红航空机械有限责任公司 | A kind of processing method and portable tooling of thin-walled small diameter tube high temperature alloy pipe |
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