CN112453216A - Necking and diameter-finishing composite die for pipe end of thin-wall pipe fitting - Google Patents
Necking and diameter-finishing composite die for pipe end of thin-wall pipe fitting Download PDFInfo
- Publication number
- CN112453216A CN112453216A CN202011162176.9A CN202011162176A CN112453216A CN 112453216 A CN112453216 A CN 112453216A CN 202011162176 A CN202011162176 A CN 202011162176A CN 112453216 A CN112453216 A CN 112453216A
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- die
- axial
- necking
- pipe fitting
- fixed
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/14—Recontouring
-
- 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
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/04—Reducing; Closing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention belongs to the technical field of pipe fitting forming, and relates to a necking and diameter-finishing composite die for a thin-wall pipe fitting pipe end, which comprises a connecting shaft fixed with a hydraulic machine, wherein an axial mandrel is fixed at the rotation center of the connecting shaft, an axial necking die is arranged on the axial mandrel in a matching manner, the axial necking die is elastically connected with the connecting shaft, and the axial necking die can axially move along the axial mandrel; and a lower pressing die is fixed on the hydraulic machine corresponding to the axial outer end of the axial necking die, an upper pressing die is arranged above the lower pressing die in a guiding and matching manner, and the upper pressing die can be close to or far away from the lower pressing die under the action of the hydraulic machine. The composite die has the advantages that the problem that the working efficiency of a pipe fitting assembly line is influenced by the interference phenomenon of the pipe fitting in the assembly process due to the size precision of the reducing area of the pipe fitting in the later period is solved, and the diameter size precision and the size stability of the pipe fitting in the reducing area of the thin-wall pipe fitting are ensured when the pipe end reducing processing is carried out on the thin-wall pipe fitting.
Description
Technical Field
The invention belongs to the technical field of pipe fitting forming, and relates to a necking and diameter-finishing composite die for a pipe end of a thin-wall pipe fitting.
Background
In the automobile manufacturing industry, thin-wall pipes are used quite a lot, and the pipes or other parts have various connecting and fixing modes; the connection fixing mode of directly expanding and necking the pipe end opening and then assembling and welding is widely applied in the automobile manufacturing industry for ensuring the sealing performance of the pipeline, and meanwhile, the connection fixing mode is economical. At present, the automatic assembly of the pipe fitting is more and more common in application, the assembly process requirement is higher and higher, and the size precision and the stability of the reducing area of the thin-wall pipe fitting are improved; the traditional single-process necking process can not meet the requirements of the size precision and the stability of the existing product, the interference phenomenon of the pipe fitting and the pipe fitting or other parts can easily occur in the pipe fitting assembling process, the alarm of an assembly line is caused, and the working efficiency of the assembly line is influenced. Therefore, how to ensure the dimensional accuracy and dimensional stability of the thin-wall pipe in the necking area is a technical problem which needs to be solved urgently.
Disclosure of Invention
Aiming at the problems, the invention provides a necking and diameter-finishing composite die for a thin-wall pipe end, which ensures the pipe diameter size precision and size stability of the necking area of the thin-wall pipe when the pipe end is subjected to necking processing, and avoids the interference phenomenon of the pipe in the assembly process caused by the size precision of the necking area of the pipe in the later period to influence the work efficiency of a pipe assembly line.
According to the technical scheme of the invention: the utility model provides a be used for compound mould of whole footpath of thin-walled tube pipe end throat which characterized in that: the hydraulic press comprises a connecting shaft fixed with a hydraulic press, wherein an axial mandrel is fixed at the rotation center of the connecting shaft, an axial necking die is arranged on the axial mandrel in a matching way, the axial necking die is elastically connected with the connecting shaft, and the axial necking die can axially move along the axial mandrel;
and a lower pressing die is fixed on the hydraulic machine corresponding to the axial outer end of the axial necking die, an upper pressing die is arranged above the lower pressing die in a guiding and matching manner, and the upper pressing die can be close to or far away from the lower pressing die under the action of the hydraulic machine.
As a further improvement of the invention, a first guide post is fixed on the lower pressing die, a first guide sleeve is fixed on the upper pressing die, and the first guide sleeve is in guiding fit with the first guide post.
As a further improvement of the invention, a limiting block is fixed in the inner cavity of the lower pressing die, and a lower insert is fixed on the feeding end surface of the lower pressing die; the feeding end surface of the upper pressing die is fixed with an upper insert.
As a further improvement of the invention, a second guide pillar is fixed on the axial necking die, a second guide sleeve is fixed on the connecting shaft, and the second guide pillar is matched with the second guide sleeve.
As a further improvement of the invention, a first fixing bolt is fastened on the end face of the axial necking die, the first fixing bolt is connected with the connecting shaft in a sliding fit manner, and a compression return spring is sleeved on the first fixing bolt.
As a further improvement of the invention, the connecting shaft is provided with a positioning groove, and the connecting part of the axial core shaft is arranged in the positioning groove in a matching way and is fastened and connected through a second fixing bolt.
As a further improvement of the invention, a third fixing bolt is fastened on the axial necking die and locks and fixes the second guide pillar.
The invention has the technical effects that: the invention can realize that two processing procedures can be completed under one cycle action of the hydraulic press, the precision of the diameter size of the pipe fitting shrinkage area and the stability of the size are ensured, and meanwhile, the invention has the advantages of easy operation, easy maintenance, strong practicability, simple structure, small occupied area and convenient assembly and disassembly, and can be completely popularized to other similar process equipment; in addition, compared with the traditional single-process die, the invention can greatly shorten the processing working hours of the pipe fittings and reduce the processing procedures and the number of the dies.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
In fig. 1 and 2, the device comprises a connecting shaft 1, an axial core shaft 2, an axial necking die 3, an upper insert 4, an upper pressing die 5, a lower pressing die 6, a first guide sleeve 7, a first guide pillar 8, a lower insert 9, a limiting block 10, a second guide pillar 11, a second guide sleeve 12, a compression return spring 13, a first fixing bolt 14, a second fixing bolt 15, a third fixing bolt 16, a thin-wall pipe 17 and the like.
As shown in fig. 1 and 2, the invention relates to a necking and diameter-adjusting composite die for a thin-wall pipe end, which comprises a connecting shaft 1 fixed with a hydraulic machine, wherein an axial mandrel 2 is fixed at the rotation center of the connecting shaft 1, an axial necking die 3 is arranged on the axial mandrel 2 in a matching manner, the axial necking die 3 is elastically connected with the connecting shaft 1, and the axial necking die 3 can axially move along the axial mandrel 2. When the device works, the connecting shaft 1 performs axial feeding and return actions along with a hydraulic machine, the upper pressing die 5 is installed on the hydraulic machine and performs vertical feeding and return actions along with the hydraulic machine, and the lower pressing die 6 is installed on the hydraulic machine and is fixed.
A lower pressing die 6 is fixed on the hydraulic machine corresponding to the axial outer end of the axial necking die 3, an upper pressing die 5 is arranged above the lower pressing die 6 in a guiding and matching mode, and the upper pressing die 5 can be close to or far away from the lower pressing die 6 under the action of the hydraulic machine.
A first guide post 8 is fixed on the lower pressing die 6, a first guide sleeve 7 is fixed on the upper pressing die 5, and the first guide sleeve 7 is matched with the first guide post 8 in a guiding mode. The mold clamping accuracy of the upper and lower dies 5 and 6 is ensured.
A limiting block 10 is fixed in the inner cavity of the lower pressing die 6, and a lower insert 9 is fixed on the feed end surface of the lower pressing die 6; the upper insert 4 is fixed on the feeding end surface of the upper die 5. When the device works, the cavity of the upper pressing die 5, the cavity of the lower pressing die 6 and the limiting block 10 position the thin-wall pipe 17. The upper insert 4 and the lower insert 9 are axially aligned and corrected with the axial necking die 3, and meanwhile, when the inserts are worn, the inserts are convenient to replace, and the life cycle of the die is prolonged.
The axial necking die 3 is fixed with a second guide post 11, the connecting shaft 1 is fixed with a second guide sleeve 12, and the second guide post 11 is matched with the second guide sleeve 12. Ensuring the concentricity of the axial necking die 3 and the axial mandrel 2.
The end face of the axial necking die 3 is fastened with a first fixing bolt 14, the first fixing bolt 14 is connected with the connecting shaft 1 in a sliding fit mode, and a compression return spring 13 is sleeved on the first fixing bolt 14.
The connecting shaft 1 is provided with a positioning groove, and the connecting part of the axial core shaft 2 is matched and arranged in the positioning groove and is fastened and connected through a second fixing bolt 15. The axial core shaft 2 is matched with the axial necking die 3, and during working, the axial necking die 3 firstly performs pipe end necking on the thin-wall pipe 17 and then is matched with the axial core shaft 2 to perform diameter finishing on the diameter of the necking area of the thin-wall pipe 17.
And a third fixing bolt 16 is fastened on the axial necking die 3, and the second guide pillar 11 is locked and fixed by the third fixing bolt 16.
The working principle of the invention is as follows: 1. discharging and die assembling
The pipe fitting is placed into the cavities of the lower pressing die 6 and the lower insert 9, the bottom end face of the pipe fitting is attached to the limiting block 10, after the switch is pressed down, the hydraulic machine drives the upper pressing die 5 and the upper insert 4 to vertically feed under the cooperation of the guide sleeve 7 and the guide pillar 8 until the upper pressing die 5 and the upper insert 4 are attached to the lower pressing die 6 and the lower insert 9, and the positioning and clamping of the pipe fitting are completed.
2. Reducing and diameter-adjusting
After the die assembly is completed, the sensor receives a signal and transmits the signal to a control system of the hydraulic machine for processing, then the control system starts the axial feeding action of the hydraulic machine, and the connecting shaft 1, the axial core rod 2, the axial necking die 3 and the spring all perform axial feeding along with the hydraulic machine. The control system is controlled by a PLC. Along with the proceeding of axial feeding, the front end of the axial necking die 3 firstly contacts with a pipe fitting and stops axial feeding, the connecting shaft 1 and the axial mandrel 2 continue axial feeding along with the hydraulic press, the spring starts to be compressed, the connecting shaft 1 continues axial feeding under the matching of the second guide pillar 1) and the second guide sleeve 12 until the connecting shaft contacts with the rear end of the axial necking die 3, and along with the proceeding of the axial feeding of the hydraulic press, the connecting shaft 1 pushes the axial necking die 3 to contact with the upper insert 4 and the lower insert 9, so that the necking process of the pipe end is completed; after the sensor receives a signal, the hydraulic press starts to perform axial return motion, the connecting shaft 1 and the axial mandrel 2 perform the axial return motion along with the hydraulic press, at the moment, the axial necking die 3 is continuously kept in contact with the upper insert 4 and the lower insert 9 until the spring is reset to the original state before compression, and in the resetting process of the spring, the axial mandrel 2 and the axial necking die 3 are in common cooperation to perform diameter-finishing processing on the diameter of a necking area of the pipe fitting; the axial return stroke of the hydraulic press is continued until the connecting shaft 1, the axial mandrel 2 and the axial necking die 3 return to the original positions (the positions before the axial stroke is executed) and are separated from the pipe fittings.
3. Mold opening material taking
After the process of reducing and sizing the pipe fitting is finished, the sensor receives signals, the hydraulic press drives to execute vertical return motion, the upper pressing die 5 and the upper insert 4 perform vertical return motion along with the hydraulic press under the matching of the first guide sleeve 7 and the first guide pillar 8, a die for fixedly clamping the pipe fitting is opened, and finally the processed pipe fitting is taken out.
Claims (7)
1. The utility model provides a be used for compound mould of whole footpath of thin-walled tube pipe end throat which characterized in that: the hydraulic press comprises a connecting shaft (1) fixed with a hydraulic press, wherein an axial mandrel (2) is fixed at the rotation center of the connecting shaft (1), an axial necking die (3) is arranged on the axial mandrel (2) in a matching manner, the axial necking die (3) is elastically connected with the connecting shaft (1), and the axial necking die (3) can axially move along the axial mandrel (2);
a lower pressing die (6) is fixed on the hydraulic machine corresponding to the axial outer end of the axial necking die (3), an upper pressing die (5) is arranged above the lower pressing die (6) in a guiding and matching mode, and the upper pressing die (5) can be close to or far away from the lower pressing die (6) under the action of the hydraulic machine.
2. The composite die for necking the pipe end of the thin-wall pipe fitting according to claim 1, wherein: a first guide pillar (8) is fixed on the lower pressing die (6), a first guide sleeve (7) is fixed on the upper pressing die (5), and the first guide sleeve (7) is matched with the first guide pillar (8) in a guiding mode.
3. The composite die for necking the pipe end of the thin-wall pipe fitting according to claim 1, wherein: a limiting block (10) is fixed in the inner cavity of the lower pressing die (6), and a lower insert (9) is fixed on the feed end face of the lower pressing die (6); an upper insert (4) is fixed on the feeding end surface of the upper pressing die (5).
4. The composite die for necking the pipe end of the thin-wall pipe fitting according to claim 1, wherein: a second guide pillar (11) is fixed on the axial necking die (3), a second guide sleeve (12) is fixed on the connecting shaft (1), and the second guide pillar (11) is matched with the second guide sleeve (12).
5. The composite die for necking the pipe end of the thin-wall pipe fitting according to claim 1, wherein: the end face of the axial necking die (3) is fastened with a first fixing bolt (14), the first fixing bolt (14) is connected with the connecting shaft (1) in a sliding fit mode, and a compression reset spring (13) is sleeved on the first fixing bolt (14).
6. The composite die for necking the pipe end of the thin-wall pipe fitting according to claim 1, wherein: the connecting shaft (1) is provided with a positioning groove, and the connecting part of the axial core shaft (2) is arranged in the positioning groove in a matched mode and is fixedly connected with the positioning groove through a second fixing bolt (15).
7. The composite die for necking the pipe end of the thin-wall pipe fitting according to claim 1, wherein: and a third fixing bolt (16) is fastened on the axial necking die (3), and the second guide pillar (11) is locked and fixed by the third fixing bolt (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162176.9A CN112453216A (en) | 2020-10-27 | 2020-10-27 | Necking and diameter-finishing composite die for pipe end of thin-wall pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011162176.9A CN112453216A (en) | 2020-10-27 | 2020-10-27 | Necking and diameter-finishing composite die for pipe end of thin-wall pipe fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112453216A true CN112453216A (en) | 2021-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011162176.9A Pending CN112453216A (en) | 2020-10-27 | 2020-10-27 | Necking and diameter-finishing composite die for pipe end of thin-wall pipe fitting |
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| Country | Link |
|---|---|
| CN (1) | CN112453216A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128503A (en) * | 2014-07-23 | 2014-11-05 | 成都市龙泉驿区齐盛机械厂 | Self-return necking die |
| CN104139114A (en) * | 2014-07-23 | 2014-11-12 | 成都市龙泉驿区齐盛机械厂 | Self-return type necking die with sealing structure |
| CN104826952A (en) * | 2015-05-31 | 2015-08-12 | 资兴市粤兴汽车零部件制造有限公司 | Pipe end hydraulic forming device for automobile pipe |
| CN107096834A (en) * | 2017-05-27 | 2017-08-29 | 柳州市御朗机械制造有限公司 | Punched pipefitting necking die |
| CN107511425A (en) * | 2017-08-23 | 2017-12-26 | 柳州劲胜科技有限公司 | Punched pipefitting necking die |
-
2020
- 2020-10-27 CN CN202011162176.9A patent/CN112453216A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128503A (en) * | 2014-07-23 | 2014-11-05 | 成都市龙泉驿区齐盛机械厂 | Self-return necking die |
| CN104139114A (en) * | 2014-07-23 | 2014-11-12 | 成都市龙泉驿区齐盛机械厂 | Self-return type necking die with sealing structure |
| CN104826952A (en) * | 2015-05-31 | 2015-08-12 | 资兴市粤兴汽车零部件制造有限公司 | Pipe end hydraulic forming device for automobile pipe |
| CN107096834A (en) * | 2017-05-27 | 2017-08-29 | 柳州市御朗机械制造有限公司 | Punched pipefitting necking die |
| CN107511425A (en) * | 2017-08-23 | 2017-12-26 | 柳州劲胜科技有限公司 | Punched pipefitting necking die |
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Application publication date: 20210309 |