CN110587234A - Processing technology of reducing pipe fitting - Google Patents
Processing technology of reducing pipe fitting Download PDFInfo
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- CN110587234A CN110587234A CN201910867221.1A CN201910867221A CN110587234A CN 110587234 A CN110587234 A CN 110587234A CN 201910867221 A CN201910867221 A CN 201910867221A CN 110587234 A CN110587234 A CN 110587234A
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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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Abstract
The invention discloses a processing technology of a reducing pipe fitting, which comprises the following steps: step S1: selecting and blanking a material blank, wherein the material blank is provided with a first end and a second end to be reduced in diameter; step S2.1: adding the material blank into a feeding position of a numerical control lathe; step S2.2: the feeding mechanism of the numerical control lathe feeds the first end into a lathe chuck of the numerical control lathe, and the length of the material blank required to be reduced is reserved; step S2.3: the lathe chuck clamps the first end and rotates at a high speed; step S2.4: inserting a core rod into the second end; step S2.5: the spinning roller is close to the periphery of the second end and extrudes the blank, and simultaneously the spinning roller moves towards the first end along the axial direction of the blank until the inner diameter of the second end meets the size requirement; step S3: cutting the port of the second end until the length of the blank meets the size requirement, so that the blank forms a semi-finished pipe fitting; step S4: sequentially polishing, cleaning and drying the semi-finished pipe fittings; step S5: and (5) inspecting the semi-finished pipe fitting. The invention has short process, low cost and high efficiency.
Description
Technical Field
The invention relates to the technical field of manufacturing of special-shaped pipe fittings, in particular to a processing technology of a reducing pipe fitting.
Background
A reducing press forming process is generally adopted, namely a pipe blank with the diameter equal to that of the large end of the reducing pipe is placed into a forming die, metal moves along a die cavity and shrinks to form the reducing pipe blank by pressing along the axial direction of the pipe blank, multiple press forming and multiple reducing are needed according to the reducing size of the reducing pipe, a die with a corresponding size is needed to be arranged for each press forming, the cost investment of the die is large, the working procedure is long, the labor cost is high, and the like.
Disclosure of Invention
Aiming at the problems of the prior special pipe reducing process, the invention aims to provide a process for processing a reducing pipe fitting with short process, low cost and high efficiency.
The specific technical scheme is as follows:
a processing technology of reducing pipe fittings comprises the following steps:
step S1: selecting and blanking a blank, wherein the blank has a first end and a second end to be reduced in diameter;
step S2.1: adding the material blank into a feeding position of a numerical control lathe;
step S2.2: the feeding mechanism of the numerical control lathe feeds the first end into a lathe chuck of the numerical control lathe, and the length of the material blank required to be reduced is reserved;
step S2.3: the lathe chuck clamps the first end and rotates at a high speed;
step S2.4: inserting a mandrel into the second end;
step S2.5: the spinning roller approaches to the periphery of the second end and extrudes the blank, and meanwhile, the spinning roller moves towards the first end along the axial direction of the blank until the inner diameter of the second end meets the size requirement;
step S3: cutting the port of the second end until the length of the blank meets the size requirement, so that the blank forms a semi-finished pipe fitting;
step S4: sequentially polishing, cleaning and drying the semi-finished pipe fitting;
step S5: and inspecting the inner diameters of the two ends of the semi-finished pipe fitting, the length of the semi-finished pipe fitting and the surface of the semi-finished pipe fitting.
The processing technology of the reducing pipe fitting further comprises the following steps: step S6: and (7) packaging and warehousing.
In the above-described process for manufacturing a reduced pipe, in step S1, the specification of the preform is calculated based on the forming size of the finished pipe.
In the processing technology of the reducing pipe fitting, in step S2.1, the material blank is automatically added to the feeding position of the numerically controlled lathe through vibrating the feeding disc.
In the processing process of the reducing pipe fitting, in step S4, the semi-finished pipe fitting is added into a polishing and cleaning device to be sequentially polished, cleaned and dried.
According to the machining process of the reducing pipe fitting, the feeding mechanism of the numerical control lathe feeds the first end into a lathe chuck of the numerical control lathe according to a program programmed by the numerical control lathe, and the reducing length required by the blank is reserved.
In the machining process of the reducing pipe fitting, an air cylinder is arranged on the numerical control lathe and used for driving the core rod to extend into the second end, and the core rod and the blank are coaxially arranged.
In the processing technology of the reducing pipe fitting, a driving mechanism is movably arranged on the numerical control lathe and used for driving the spinning roller to move.
Compared with the prior art, the technical scheme has the positive effects that:
the processing technology of the invention comprises the steps of copper pipe blanking, numerical control diameter reduction, opening flattening, subsequent treatment (polishing, cleaning and drying), inspection and packaging. The invention has short process, low cost and high efficiency.
Drawings
Fig. 1 is a schematic overall structure diagram of a processing technique of a reducing pipe fitting in an embodiment of the invention;
FIG. 2 is a top view of the overall structure of an embodiment of a process for manufacturing a reduced diameter pipe according to the present invention;
FIG. 3 is a cross-sectional view of a spinning roller according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of the pipe after blanking according to the process for manufacturing a pipe with a different diameter of the present invention;
FIG. 5 is a cross-sectional view of a reduced diameter pipe of the present invention after a first reduction in diameter in a comparative example;
FIG. 6 is a cross-sectional view of a reduced diameter pipe of the present invention after a second reduction in diameter of the pipe in a comparative example;
FIG. 7 is a cross-sectional view of a third reduced diameter pipe of a process of making a reduced diameter pipe of the present invention according to a comparative example;
FIG. 8 is a cross-sectional view of a fourth reduced diameter pipe of a comparative example illustrating the process of forming a reduced diameter pipe of the present invention;
FIG. 9 is a cross-sectional view of a pipe reshaped in a comparative example according to the process for manufacturing a reduced diameter pipe according to the present invention;
FIG. 10 is a cross-sectional view of a pipe member after being flattened in a comparative example according to a process for manufacturing a reduced diameter pipe member according to the present invention;
in the drawings: 1. a material blank; 2. a numerically controlled lathe; 3. a lathe chuck; 4. a core rod; 5. spinning the roller; 6. a cylinder; 7. a drive mechanism.
Detailed Description
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Example 1: production specification is bell and spigot reducer 31/8X 15/8 reducing pipe fitting
FIG. 1 is a schematic view of an overall structure of a process for manufacturing a reduced diameter pipe according to an embodiment of the present invention,
fig. 2 is a top view of an overall structure of a process for manufacturing a reduced diameter pipe according to an embodiment of the present invention, fig. 3 is a cross-sectional view of a spinning roller according to an embodiment of the process for manufacturing a reduced diameter pipe according to the present invention, and fig. 1 to 3 show a process for manufacturing a reduced diameter pipe according to a preferred embodiment, including:
step S1: feeding a hard TP2 pipe with the specification of phi 79.3mm multiplied by 1.81mm by a feeding machine, wherein the feeding length is 91+1 mm;
step S2.1: adding the material blank 1 into a feeding position of a numerical control lathe 2;
step S2.2: the feeding mechanism of the numerical control lathe 2 sends the first end into a lathe chuck 3 of the numerical control lathe 2, and the length of the material blank 1 needing reducing is reserved;
step S2.3: the lathe chuck 3 clamps the first end and rotates at a high speed;
step S2.4: inserting the core rod 4 into the second end;
step S2.5: the periphery of the spinning roller 5 towards the second end is close to and extrudes the blank, and simultaneously the spinning roller 5 moves towards the first end along the axial direction of the blank 1 until the inner diameter of the second end meets the size requirement, the second end is a reducing end, and the inner diameter of the second end is phi 41.35-41.48 mm;
step S3: cutting the port of the second end until the length of the blank 1 meets the size requirement, so that the blank 1 forms a semi-finished pipe fitting, and the length of the semi-finished pipe fitting is 93.5-98.5 mm;
step S4: sequentially polishing, cleaning and drying the semi-finished pipe fittings;
step S5: and (5) checking the inner diameters of the two ends of the semi-finished pipe fitting, the length of the semi-finished pipe fitting and the surface of the semi-finished pipe fitting.
Further, as a preferred embodiment, the processing technology of the reducing pipe further includes: step S6: and (7) packaging and warehousing.
Further, as a preferred embodiment, in step S1, the specifications of the preform 1 are calculated based on the formed dimensions of the finished tube.
Further, as a preferred embodiment, in step S2.1, the material blank 1 is automatically fed to the feeding position of the numerically controlled lathe 2 by vibrating the feeding tray.
Further, as a preferred embodiment, in step S4, the semi-finished pipe is put into a polishing and cleaning device to be polished, cleaned and dried in sequence.
Further, as a preferred embodiment, according to the program programmed in the numerically controlled lathe 2, the feeding mechanism of the numerically controlled lathe 2 feeds the first end into the lathe chuck 3 of the numerically controlled lathe 2, and reserves the required reducing length of the preform 1.
Further, as a preferred embodiment, the numerically controlled lathe 2 is provided with an air cylinder 6, the air cylinder 6 is used for driving the core rod 4 to extend into the second end, and the core rod 4 is arranged coaxially with the blank 1.
Further, as a preferred embodiment, a driving mechanism 7 is movably arranged on the numerically controlled lathe 2, and the driving mechanism 7 is used for driving the spinning roller 5 to move.
Example 2: production specification is bell and spigot reducer 25/8X 13/8 reducing pipe fitting
As shown in fig. 1 to 3, the process for processing a reducing pipe fitting of embodiment 2 includes:
step S1: blanking the hard TP2 pipe with the specification of phi 66.6mm multiplied by 1.83mm by a blanking machine, wherein the blanking length is 74+1 mm;
step S2.1: adding the material blank 1 into a feeding position of a numerical control lathe 2;
step S2.2: the feeding mechanism of the numerical control lathe 2 sends the first end into a lathe chuck 3 of the numerical control lathe 2, and the length of the material blank 1 needing reducing is reserved;
step S2.3: the lathe chuck 3 clamps the first end and rotates at a high speed;
step S2.4: inserting the core rod 4 into the second end;
step S2.5: the spinning roller 5 approaches to the periphery of the second end and extrudes the blank, and meanwhile, the spinning roller 5 moves towards the first end along the axial direction of the blank 1 until the inner diameter of the second end meets the size requirement, the second end is a reducing end, and the inner diameter of the second end is phi 35 mm-phi 35.1 mm;
step S3: cutting the port of the second end until the length of the blank 1 meets the size requirement, so that the blank 1 forms a semi-finished pipe fitting, and the length of the semi-finished pipe fitting is 79 mm;
step S4: sequentially polishing, cleaning and drying the semi-finished pipe fittings;
step S5: and (5) checking the inner diameters of the two ends of the semi-finished pipe fitting, the length of the semi-finished pipe fitting and the surface of the semi-finished pipe fitting.
Example 3: production specification is bell and spigot reducer 21/8X 5/8 reducing pipe fitting
As shown in fig. 1 to 3, the process for processing a reducing pipe fitting according to embodiment 3 includes:
step S1: blanking the hard TP2 pipe with the specification of phi 53.9mm multiplied by 1.5mm by a blanking machine, wherein the blanking length is 64+1 mm;
step S2.1: adding the material blank 1 into a feeding position of a numerical control lathe 2;
step S2.2: the feeding mechanism of the numerical control lathe 2 sends the first end into a lathe chuck 3 of the numerical control lathe 2, and the length of the material blank 1 needing reducing is reserved;
step S2.3: the lathe chuck 3 clamps the first end and rotates at a high speed;
step S2.4: inserting the core rod 4 into the second end;
step S2.5: the spinning roller 5 approaches to the periphery of the second end and extrudes the blank, and meanwhile, the spinning roller 5 moves towards the first end along the axial direction of the blank 1 until the inner diameter of the second end meets the size requirement, the second end is a reducing end, and the inner diameter of the second end is phi 16 mm;
step S3: cutting the port of the second end until the length of the blank 1 meets the size requirement, so that the blank 1 forms a semi-finished pipe fitting, and the length of the semi-finished pipe fitting is 69 mm;
step S4: sequentially polishing, cleaning and drying the semi-finished pipe fittings;
step S5: and (5) checking the inner diameters of the two ends of the semi-finished pipe fitting, the length of the semi-finished pipe fitting and the surface of the semi-finished pipe fitting.
Comparative example 11: production specification is bell and spigot reducer 31/8X 15/8 reducing pipe fitting
Fig. 4 is a sectional view of a pipe member after blanking according to a processing method of a reducing pipe member of the present invention, fig. 5 is a sectional view of a pipe member after first diameter reduction according to a processing method of a reducing pipe member of the present invention in a comparative example, fig. 6 is a sectional view of a pipe member after second diameter reduction according to a processing method of a reducing pipe member of the present invention in a comparative example, fig. 7 is a sectional view of a pipe member after third diameter reduction according to a processing method of a reducing pipe member of the present invention in a comparative example, fig. 8 is a sectional view of a pipe member after fourth diameter reduction according to a processing method of a reducing pipe member of the present invention in a comparative example, fig. 9 is a sectional view of a pipe member after shaping according to a processing method of a reducing pipe member of the present invention in a comparative example, fig. 10 is a sectional view of a pipe member after flat-opening according to a processing method of a reducing pipe member of the present invention in a comparative example, as shown in fig. 4 to fig, the method comprises the following steps:
step S1: blanking, calculating blanking specification according to the forming size of the finished pipe fitting, and blanking the hard TP2 pipe with the specification of phi 79.3mm multiplied by 1.81mm by a blanking machine, wherein the blanking length is 113+1 mm;
step S2: reducing the diameter for the first time, taking a diameter reducing die with the diameter of phi 75, loading the blank 1 into the die, pressing the blank in a 63-ton punch press, wherein the diameter of a second end is phi 75, the length of the second end is 46mm, and the length of a straight line section of the first end is 53 mm;
step S3: reducing the diameter for the second time, taking a diameter reducing die with the diameter of phi 65, putting the blank 1 into the die, pressing the blank in a 63-ton punch press, wherein the diameter of the second end is phi 65, and the length of the second end is 41 mm;
step S4: reducing the diameter for the third time, taking a diameter reducing die with the diameter of phi 55, loading the blank 1 into the die, pressing the blank in a 63-ton punch press, wherein the diameter of the second end is phi 55, and the length of the second end is 36 mm;
step S5: fourthly, reducing the diameter, namely taking a diameter reducing die with the diameter of phi 45, putting the blank 1 into the die, and pressing the blank in a 63-ton punch press, wherein the diameter of the second end is phi 45, and the length of the second end is 29 mm;
step S6: shaping, namely, taking a shaping die, flaring the blank 1 until the inner diameter meets the requirement of a drawing, wherein the inner diameter phi of the first end is 79.27-79.43mm, and the inner diameter phi of the second end is 41.35-41.48 mm;
step S7: flattening, cutting the port of the second end until the length dimension meets the requirement of a drawing and is 93.5-98.5 mm;
step S8: polishing, cleaning and drying, namely adding the semi-finished pipe fitting into polishing and cleaning equipment to sequentially perform polishing, cleaning and drying;
step S9: and (5) inspecting and warehousing, namely inspecting the inner diameter, the length size and the surface of the two ends of the semi-finished pipe fitting according to the requirements of a drawing, and packaging and warehousing.
Comparative example 21: production specification is bell and spigot reducer 25/8X 13/8 reducing pipe fitting
As shown in fig. 4 to 10, the process for processing the reducing pipe comprises the following steps:
step S1: blanking, calculating blanking specification according to the forming size of the finished pipe fitting, and blanking the hard TP2 pipe with the specification of phi 66.6mm multiplied by 1.83mm through a blanking machine, wherein the blanking length is 83+1 mm;
step S2: reducing the diameter for the first time, taking a diameter reducing die with the diameter phi of 58, loading the blank 1 into the die, pressing the blank in a 63-ton punch press, wherein the diameter of the second end is phi 58mm, and the length of the second end is 45 mm;
step S3: reducing the diameter for the second time, taking a diameter reducing die with the diameter of phi 50, putting the blank 1 into the die, and pressing the blank in a 63-ton punch press, wherein the diameter of the second end is phi 50mm, and the length of the second end is 40 mm;
step S4: reducing the diameter for the third time, taking a diameter reducing die with the diameter of phi 44, putting the blank 1 into the die, and pressing the blank in a 63-ton punch press, wherein the diameter of the second end is phi 44mm, and the length of the second end is 35 mm;
step S5: fourthly, reducing the diameter, namely taking a diameter reducing die with the diameter of phi 37, putting the blank 1 into the die, and pressing the blank in a 63-ton punch press, wherein the diameter of the second end is phi 37mm, and the length of the second end is 29 mm;
step S6: shaping, namely, taking a shaping die, flaring the blank 1 until the inner diameter meets the requirement of a drawing, wherein the inner diameter phi of the first end is 62.9mm, and the inner diameter phi of the second end is 35.08 mm;
step S7: flattening, cutting the port of the second end until the length dimension meets the requirement of a drawing and is 82 mm;
step S8: polishing, cleaning and drying, namely adding the blank 1 into polishing and cleaning equipment to sequentially perform polishing, cleaning and drying;
step S9: and (5) inspecting and warehousing, namely inspecting the inner diameter, the length size and the surface of the two ends of the semi-finished pipe fitting according to the requirements of a drawing, and packaging and warehousing.
Comparative example 31: production specification is bell and spigot reducer 21/8X 5/8 reducing pipe fitting
As shown in fig. 4 to 10, the process for processing the reducing pipe comprises the following steps:
step S1: blanking, calculating blanking specification according to the forming size of the finished pipe fitting, and blanking the hard TP2 pipe with the specification of phi 53.9mm multiplied by 1.5mm through a blanking machine, wherein the blanking length is 71+1 mm;
step S2: reducing the diameter for the first time, taking a diameter reducing die with a diameter of phi 46, loading the blank 1 into the die, pressing the blank in a 63-ton punch press, wherein the diameter of a second end is phi 46mm, the length of the second end is 33mm,
step S3: reducing the diameter for the second time, taking a diameter reducing die with the diameter of phi 40, putting the blank 1 into the die, and pressing the blank in a 63-ton punch press, wherein the diameter of the second end is phi 40mm, and the length of the second end is 30 mm;
step S4: reducing the diameter for the third time, taking a diameter reducing die with the diameter of phi 34, loading the blank 1 into the die, and pressing the blank in a 63-ton punch press, wherein the diameter of the second end is phi 34mm, and the length of the second end is 27 mm;
step S5: reducing the diameter for the fourth time, taking a diameter reducing die with the diameter phi of 27, putting the blank 1 into the die, and pressing the blank in a 63-ton punch press, wherein the diameter of the second end is phi 27mm, and the length of the second end is 24 mm;
step S6: reducing the diameter for the fifth time, taking a diameter reducing die with the diameter of phi 22, loading the blank 1 into the die, pressing the blank in a 63-ton punch press, wherein the diameter of a second end is phi 22mm, and the length of the second end is 20 mm;
step S7: shaping, namely, taking a shaping die, flaring the blank 1 until the inner diameter meets the requirement of a drawing, wherein the inner diameter phi of the first end is 50.9mm, and the inner diameter phi of the second end is 16 mm;
step S8: flattening, cutting the port of the second end until the length dimension meets the requirement of the drawing and is 70 mm;
step S9: polishing, cleaning and drying, namely adding the pipe fitting 1 into polishing and cleaning equipment to sequentially perform polishing, cleaning and drying;
step S10: and (5) inspecting and warehousing, namely inspecting the inner diameter, the length size and the surface of the two ends of the semi-finished pipe fitting according to the requirements of a drawing, and packaging and warehousing.
TABLE 1 comparison of reducing pipe processing techniques
From table 1, the product weight of example 1 is 21.2%, 30.5% and 14.5% respectively, compared with comparative example 11, example 2 is 21% and example 3 is 31, respectively, when the product standard requirement is met. By adopting the spinning process, the diameter reduction can be realized in one step on the numerical control lathe, the processing procedure is shortened by more than 50%, a die is not needed, the processing cost is greatly reduced, one-step diameter reduction die replacement is not needed, and the production efficiency is greatly improved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A processing technology of a reducing pipe fitting is characterized by comprising the following steps:
step S1: selecting and blanking a blank, wherein the blank has a first end and a second end to be reduced in diameter;
step S2.1: adding the material blank into a feeding position of a numerical control lathe;
step S2.2: the feeding mechanism of the numerical control lathe feeds the first end into a lathe chuck of the numerical control lathe, and the length of the material blank required to be reduced is reserved;
step S2.3: the lathe chuck clamps the first end and rotates at a high speed;
step S2.4: inserting a mandrel into the second end;
step S2.5: the spinning roller approaches to the periphery of the second end and extrudes the blank, and meanwhile, the spinning roller moves towards the first end along the axial direction of the blank until the inner diameter of the second end meets the size requirement;
step S3: cutting the port of the second end until the length of the blank meets the size requirement, so that the blank forms a semi-finished pipe fitting;
step S4: sequentially polishing, cleaning and drying the semi-finished pipe fitting;
step S5: and inspecting the inner diameters of the two ends of the semi-finished pipe fitting, the length of the semi-finished pipe fitting and the surface of the semi-finished pipe fitting.
2. The process for machining a reduced diameter pipe fitting according to claim 1, further comprising: step S6: and (7) packaging and warehousing.
3. The process of manufacturing a reduced diameter pipe according to claim 1, wherein in step S1, the dimension of the blank is calculated based on the formed dimension of the finished pipe.
4. The process for machining a reducing pipe fitting according to claim 1, wherein in step S2.1, the material blank is automatically fed to the feeding position of the numerically controlled lathe through a vibrating feeding disc.
5. The process of claim 1, wherein in step S4, the semi-finished pipe is put into a polishing and cleaning device to be polished, cleaned and dried in sequence.
6. The process for machining a reducing pipe fitting according to claim 1, wherein a feeding mechanism of the numerically controlled lathe feeds the first end into a lathe chuck of the numerically controlled lathe according to a program programmed in the numerically controlled lathe, and a length of the blank to be reduced is reserved.
7. The machining process of the reducing pipe fitting according to claim 1, wherein an air cylinder is arranged on the numerical control lathe and used for driving the core rod to extend into the second end, and the core rod and the blank are coaxially arranged.
8. The processing technology of the reducing pipe fitting according to claim 1, wherein a driving mechanism is movably arranged on the numerical control lathe and used for driving the spinning roller to move.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910867221.1A CN110587234A (en) | 2019-09-12 | 2019-09-12 | Processing technology of reducing pipe fitting |
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| CN201910867221.1A CN110587234A (en) | 2019-09-12 | 2019-09-12 | Processing technology of reducing pipe fitting |
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| CN110587234A true CN110587234A (en) | 2019-12-20 |
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| CN111958253A (en) * | 2020-08-06 | 2020-11-20 | 四川同一热能设备有限公司 | Heat exchanger mechanical tubes shaping all-in-one |
| CN113458248A (en) * | 2021-05-07 | 2021-10-01 | 中国科学院金属研究所 | Necking and flaring mixed forming method for conical barrel part with straight barrel |
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| CN113458248B (en) * | 2021-05-07 | 2022-08-09 | 中国科学院金属研究所 | Necking and flaring mixed forming method for conical barrel part with straight barrel |
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Application publication date: 20191220 |
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