CN218744003U - Hot extrusion structure for alloy pipe - Google Patents
Hot extrusion structure for alloy pipe Download PDFInfo
- Publication number
- CN218744003U CN218744003U CN202223124136.2U CN202223124136U CN218744003U CN 218744003 U CN218744003 U CN 218744003U CN 202223124136 U CN202223124136 U CN 202223124136U CN 218744003 U CN218744003 U CN 218744003U
- Authority
- CN
- China
- Prior art keywords
- section
- die
- extrusion
- shaping
- hot extrusion
- 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.)
- Active
Links
Images
Landscapes
- Extrusion Of Metal (AREA)
Abstract
The utility model discloses a hot extrusion structure for alloy pipes, which comprises a die sleeve, wherein the inner side of the die sleeve is provided with a conical positioning hole, the inner sleeve of the positioning hole is provided with a die and a die pad which are mutually connected, the middle part of the die is provided with an extrusion hole, and the inner side of the extrusion hole is provided with a perforation needle; the extrusion hole is equipped with the entry section, the shaping section, first demolding section and the fastening section that connect gradually along the extrusion direction, and the appearance of entry section and first demolding section is conical, and the appearance of shaping section and fastening section is cylindrically, through convex changeover portion interconnect between entry section and the shaping section, the both ends of changeover portion respectively with entry section and shaping section smooth connection. The utility model discloses can reduce the mould in hot extrusion process and fervent metal's laminating time to make tubular product drawing of patterns smoothly after the shaping, thereby reduce the excessive deformation and the fracture damage of mould and perforation needle.
Description
Technical Field
The utility model relates to a hot extrusion die, especially an alloy tubular product is with hot extrusion structure.
Background
The hot extrusion process is a plastic working method which heats a metal material to a hot forging forming temperature and then flows out of a specific die hole through extrusion so as to obtain a required section shape and size, and is mainly used for producing bars, pipes and profiled bars of stainless steel, nickel-based high-temperature alloy and refractory alloy. A conventional hot extrusion die for pipes is shown in patent 201811568418.7, and mainly comprises a die, a die sleeve and a perforating needle, wherein the die is fixed on the outer side of the perforating needle through the die sleeve and forms an extrusion channel for metal materials to pass through after being mutually nested with the perforating needle; so that the metal material can form a finished pipe with a corresponding section shape after passing through the extrusion channel.
However, the existing hot extrusion die has the defects that the hot extrusion die needs to bear compressive stress and bending stress when in work, needs to bear certain tensile stress when the pipe is demoulded, and also can bear the action of impact load, so that the die has large extrusion deformation force and short service life. On the other hand, when the hot extrusion die is used for part of special metal with higher melting point, the heating temperature can reach more than 1100 ℃; thereby causing problems of excessive deformation and cracking breakage of the die and the piercing pin, once they are in pressing contact with the hot metal for too long a time.
Therefore, a hot extrusion die for alloy pipes with high extrusion stability and long service life is needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an alloy is hot extrusion structure for tubular product. The die can reduce the attaching time of the die and the incandescent metal in the hot extrusion process, and enables the pipe to be smoothly demoulded after being formed, thereby reducing excessive deformation and cracking damage of the die and the perforating needle.
The technical scheme of the utility model: the hot extrusion structure for the alloy pipe comprises a die sleeve, wherein a conical positioning hole is formed in the inner side of the die sleeve, a die and a die pad which are mutually connected are sleeved in the positioning hole, an extrusion hole is formed in the middle of the die, and a perforation needle is arranged on the inner side of the extrusion hole; the extrusion hole is equipped with inlet section, shaping section, first demolding section and the fastening section that connects gradually along the extrusion direction, and the appearance of inlet section and first demolding section is conical, and the appearance of shaping section and fastening section is cylindrical, through convex transition section interconnect between inlet section and the shaping section, the both ends of transition section respectively with inlet section and shaping section smooth connection, the appearance of perforation needle is cylindrical, and the one end of perforation needle is equipped with second demolding section and third demolding section along the extrusion direction in proper order, and the appearance of second demolding section and third demolding section is conical.
In the hot extrusion structure for the alloy pipe, the taper of the second stripping section is 20-30 degrees, and the taper of the third stripping section is 100-110 degrees.
In the hot extrusion structure for the alloy pipe, the taper of the inlet section is 130 to 140 degrees.
In the hot extrusion structure for the alloy pipe, the radius of the transition section is 1/6-1/7 of the axial length of the forming section, and the axial length of the forming section is 20-30% of the axial length of the die.
In the hot extrusion structure for the alloy pipe, the taper of the first stripping section is 25-30 degrees.
In the hot extrusion structure for the alloy pipe, the middle part of the die pad is provided with a cylindrical sleeve hole.
Compared with the prior art, the utility model has the characteristics of it is following:
(1) Through the transition section arranged between the inlet section and the forming section, metal materials can smoothly enter the forming section without being adhered to the working surface, and through the parameter limitation on the inlet section, the transition section and the forming section, the hot extrusion forming of the pipe can be ensured, and meanwhile, the fitting time of the high-temperature pipe in the die is reduced, so that the excessive deformation of the die caused by heat concentration and local overheating is relieved, and the structural stability and the service life of the die are improved;
(2) Through the first demoulding section which is 25-30 degrees and is opened outwards, a thermal expansion space of the pipe and the extruded pipe can be reserved, so that the forming effect of the pipe is improved, and the stress deformation of the pipe is avoided; the fastening section arranged at the rear side of the first demolding section can be matched with the through hole to limit the pipe, so that the pipe can be cured and molded at the position after thermal expansion, and the dimensional precision and the surface quality of the molded pipe are ensured;
(3) Through the matching arrangement of the die sleeve, the die and the die pad, the die pad can help the die to bear extrusion stress in the extrusion process, so that the extrusion deformation of the die in use is relieved; the concentricity of the die and the die pad after positioning can be improved by positioning the die and the die pad through the positioning hole on the inner side of the die sleeve, thereby improving the processing quality of the utility model for the pipe;
(4) Through the second demoulding section and the third demoulding section at the end part of the perforating needle, the demoulding stability of the formed pipe can be improved, the problems of crushing and cracking of the end part of the perforating needle caused by inward extrusion of the pipe during demoulding are effectively prevented, and the structural stability of the perforating needle is improved;
therefore, the utility model discloses can reduce the mould at hot extrusion in-process and the laminating time of red-hot metal to make tubular product drawing of patterns smoothly after the shaping, thereby reduce the excessive deformation and the fracture damage of mould and punch pin.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is an enlarged view of FIG. 1 from A;
fig. 3 is an enlarged view of fig. 1 in the direction B.
The labels in the figures are: 1-die sleeve, 2-positioning hole, 3-die, 4-die cushion, 5-perforating needle, 6-inlet section, 7-forming section, 8-first demoulding section, 9-fastening section, 10-transition section, 11-second demoulding section and 12-third demoulding section.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
Examples are given. The hot extrusion structure for the alloy pipe comprises a die sleeve 1, wherein a conical positioning hole 2 is formed in the inner side of the die sleeve 1, the aperture of the positioning hole 2 is gradually increased along the extrusion direction, a die 3 and a die pad 4 which are mutually connected are sleeved in the positioning hole 2, an extrusion hole is formed in the middle of the die 3, a perforation needle 5 is arranged on the inner side of the extrusion hole, an extrusion cylinder and an extrusion rod which are positioned on one side of the die 3 are arranged on the outer side of the perforation needle 5, a cavity for filling metal is formed among the extrusion cylinder, the extrusion rod and the perforation needle 5, and the extrusion rod extrudes the metal towards the die 3 to enable the metal to enter the extrusion hole;
the extrusion hole is provided with an inlet section 6, a forming section 7, a first demolding section 8 and a fastening section 9 which are sequentially connected along the extrusion direction, the inlet section 6 and the first demolding section 8 are both conical in shape, the forming section 7 and the fastening section 9 are both cylindrical in shape, the inlet section 6 and the forming section 7 are connected with each other through a circular arc-shaped transition section 10, two ends of the transition section 10 are respectively and smoothly connected with the inlet section 6 and the forming section 7, a cushion block connected with a die sleeve 1 is arranged outside the die cushion 4, the inner wall of the cushion block extends to the radial inner side of the die cushion 4 and supports the die cushion 4, and the end part of a perforation needle 5 penetrates through the cushion block and extends to the outside; the appearance of perforation needle 5 is cylindrical, and the one end of perforation needle 5 is equipped with second demoulding section 11 and third demoulding section 12 along extrusion direction in proper order, and the appearance of second demoulding section 11 and third demoulding section 12 is conical, and the external diameter of second demoulding section 11 and third demoulding section 12 reduces along extrusion direction gradually.
The taper of the second stripping section 11 is 20-30 degrees, and the taper of the third stripping section 12 is 100-110 degrees.
The taper of the inlet section 6 is 130-140 deg.
The radius of the transition section 10 is 1/6-1/7 of the axial length of the forming section 7, and the axial length of the forming section 7 is 20-30% of the axial length of the die 3.
The taper of the first stripping section 8 is 25-30 degrees.
The middle part of the die cushion 4 is provided with a cylindrical sleeve hole.
The utility model discloses a theory of operation: when the utility model is used, the metal material is injected from the inlet section 6 by the extrusion rod, so that the metal material passes through the inlet section 6, the transition section 10, the forming section 7, the first demoulding section 8 and the fastening section 9 along the perforation needle 5 in sequence after being injected; by limiting the size of the transition section 10, the metal material can not be adhered to the joint of the inlet section 6 and the forming section 7 in the flowing process, and the surface quality of the extruded pipe is improved. By limiting the size of the forming section 7, the fitting time of the pipe in the die 3 can be reduced, and the possibility of deformation of the die 3 due to thermal extrusion is reduced. When tubular product passed first demoulding section 8 and fastening section 9, can reserve the space that supplies tubular product thermal expansion through conical first demoulding section 8, through the cooperation of fastening section 9 and perforation needle 5, then can carry out the secondary to tubular product after the inflation and stereotype to guarantee the shaping effect and the size precision of tubular product. When the pipe is completely extended and demolded from the end of the piercing needle 5, the pipe can be smoothly demolded by the cooperation of the second demolding section 11 and the third demolding section 12, and the demolding stability of the pipe is improved.
Claims (6)
1. Alloy is hot extrusion structure for tubular product, its characterized in that: the die comprises a die sleeve (1), wherein a conical positioning hole (2) is formed in the inner side of the die sleeve (1), a die (3) and a die pad (4) which are mutually connected are sleeved in the positioning hole (2), an extrusion hole is formed in the middle of the die (3), and a perforation needle (5) is arranged on the inner side of the extrusion hole; the extrusion hole is equipped with inlet section (6) that connects gradually along the extrusion direction, shaping section (7), first demoulding section (8) and fastening section (9), the appearance of inlet section (6) and first demoulding section (8) is conical, the appearance of shaping section (7) and fastening section (9) is cylindrical, through convex changeover portion (10) interconnect between inlet section (6) and shaping section (7), the both ends of changeover portion (10) respectively with inlet section (6) and shaping section (7) smooth connection, the appearance of perforation needle (5) is cylindrical, and the one end of perforation needle (5) is equipped with second demoulding section (11) and third demoulding section (12) along the extrusion direction in proper order, and the appearance of second demoulding section (11) and third demoulding section (12) is conical.
2. The hot extrusion structure for alloy pipes according to claim 1, wherein: the taper of the second stripping section (11) is 20-30 degrees, and the taper of the third stripping section (12) is 100-110 degrees.
3. The hot extrusion structure for alloy pipes according to claim 1, wherein: the conicity of the inlet section (6) is 130-140 degrees.
4. The hot extrusion structure for alloy pipes according to claim 1, wherein: the radius of the transition section (10) is 1/6-1/7 of the axial length of the molding section (7), and the axial length of the molding section (7) is 20-30% of the axial length of the mold (3).
5. The hot extrusion structure for alloy pipes according to claim 1, wherein: the taper of the first stripping section (8) is 25-30 degrees.
6. The hot extrusion structure for alloy pipes according to claim 1, wherein: the middle part of the die cushion (4) is provided with a cylindrical sleeve hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223124136.2U CN218744003U (en) | 2022-11-23 | 2022-11-23 | Hot extrusion structure for alloy pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223124136.2U CN218744003U (en) | 2022-11-23 | 2022-11-23 | Hot extrusion structure for alloy pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218744003U true CN218744003U (en) | 2023-03-28 |
Family
ID=85676293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223124136.2U Active CN218744003U (en) | 2022-11-23 | 2022-11-23 | Hot extrusion structure for alloy pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218744003U (en) |
-
2022
- 2022-11-23 CN CN202223124136.2U patent/CN218744003U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201064816Y (en) | Special-purpose hinge pin bolt forming die | |
| CN102756011B (en) | Manufacture method of irregular pipe | |
| CN105880310A (en) | Forming mold and method for ultra-fine grain hollow magnesium alloy profile | |
| CN102744284A (en) | High-pressure elbow pipe billet heat-pushing temperature pressure shaping method | |
| CN101954389A (en) | Metal elbow cold extrusion molding device | |
| CN206316303U (en) | The small gear ring radial direction wedge pressure mould of combination gear | |
| CN218744003U (en) | Hot extrusion structure for alloy pipe | |
| CN110961560B (en) | Forging method for one-time upsetting forming of large-height-diameter-ratio bar | |
| CN112676528A (en) | Water drop type shell double-head hot extrusion pipe material forming tool die and forming process | |
| CN218873301U (en) | Bidirectional hot extrusion structure for alloy bar | |
| CN107186149B (en) | One-die two-piece forging die and method for drill pipe joint | |
| CN113172190B (en) | Forging forming method | |
| CN210907441U (en) | Forming die assembly for inner and outer reducing pipe fittings | |
| CN212944990U (en) | Special-shaped double-end-face tooth-shaped structure metal sleeve one-time forming device for automobile | |
| CN114714609A (en) | Flaring tool and flaring method for PVC-O pipe | |
| CN110216233B (en) | Production method of thick-wall seamless elbow | |
| CN207982015U (en) | The molding die component of car oil cooler connecting sleeve stud | |
| CN106313283A (en) | Wallboard production die convenient to preheat and radiate | |
| CN112296235A (en) | Copper pipe upsetting and extruding device of one-step forming crystallizer | |
| CN210754412U (en) | Combined extrusion die for extruding high-temperature alloy pipe and rod | |
| CN219292646U (en) | Forging die | |
| CN214976740U (en) | Dual-purpose crimping formula carbon steel pipe fitting forming die | |
| CN111112363A (en) | Forming method of aluminum alloy product and die thereof | |
| CN1247336C (en) | Integrated forming manufacture method of seamless pipe for gas insulating equipment | |
| CN118122940B (en) | Double-procedure extrusion-upsetting composite forming method and die for special-shaped head bolt |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |