CN111545586A - Equal-channel extrusion forming hydraulic machine for pipes - Google Patents
Equal-channel extrusion forming hydraulic machine for pipes Download PDFInfo
- Publication number
- CN111545586A CN111545586A CN202010423158.5A CN202010423158A CN111545586A CN 111545586 A CN111545586 A CN 111545586A CN 202010423158 A CN202010423158 A CN 202010423158A CN 111545586 A CN111545586 A CN 111545586A
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- cross beam
- core rod
- hydraulic cylinder
- movable
- upper core
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Classifications
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- 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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/001—Extruding metal; Impact extrusion to improve the material properties, e.g. lateral extrusion
-
- 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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
-
- 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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
-
- 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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
- B21C23/212—Details
Abstract
The invention discloses a hydraulic press for extruding and forming a pipe and other channels, which comprises four upright posts, an upper cross beam, a movable cross beam, a lower cross beam and a workbench, wherein two main hydraulic cylinders are arranged on two sides of the upper cross beam; the invention utilizes the combined type core rod and adopts the equal channel angular extrusion process to extrude the pipe blank, thereby refining the crystal grains of the pipe blank, enhancing the strength of the pipe blank and greatly improving the product quality and the production efficiency.
Description
Technical Field
The invention relates to the technical field of extrusion forming, in particular to an equal-channel extrusion forming hydraulic machine for pipes.
Background
Equal Channel Angular Pressing (ECAP) is an effective method for preparing large-size submicron and nanometer ultrafine grained materials by applying a large number of severe plastic deformation technologies. The principle is that a blank passes through a channel with equal cross section and intersected with two axial lines under the action of extrusion force, and generates approximate ideal pure shearing deformation at a corner, so that grains of an extrusion material are refined through dislocation segmentation; because the cross-sectional shape and area of the sample are not changed before and after extrusion, a considerable accumulated strain can be obtained by multi-pass extrusion, so that the structure and physical properties of the material are obviously changed. The blank processed by the ECAP process is generally a columnar blank, and no relevant report on the equal-channel angular extrusion processing technology of the pipe blank exists at present.
Disclosure of Invention
The invention aims to provide a hydraulic press for equal-channel extrusion forming of pipes, which is used for solving the problems in the prior art, and the combined type core rod is used for extruding and processing pipe blanks by adopting an equal-channel angular extrusion process, so that the grains of the pipe blanks are refined, the strength of the pipe blanks is enhanced, and the product quality and the production efficiency are greatly improved.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a hydraulic press for extruding and forming a pipe and other channels, which comprises an upright post, an upper cross beam, a movable cross beam and a lower cross beam, wherein the upper cross beam is arranged at the top end of the upright post, the lower cross beam is arranged at the bottom end of the upright post, the movable cross beam is arranged between the upper cross beam and the lower cross beam, a guide hole is formed in the movable cross beam, the upright post is inserted into the guide hole and movably connected, a main hydraulic cylinder is respectively arranged at two sides of the top of the upper cross beam, the cylinder body of the main hydraulic cylinder is fixed on the upper cross beam, the piston rod of the main hydraulic cylinder is connected on the movable cross beam, an extrusion boss is fixed at the bottom end surface of the movable cross beam, a middle hydraulic cylinder is also arranged on the upper cross beam, the cylinder body of the middle hydraulic cylinder is fixed on the upper cross beam, and, an upper core rod I is further arranged at the bottom of the piston rod of the middle hydraulic cylinder, the extrusion boss is sleeved outside the upper core rod I, and the bottom of the upper core rod I is connected with an upper core rod II;
a movable workbench capable of moving longitudinally is fixed at the top of the lower cross beam, an equal-channel mold is fixed at the top of the movable workbench, the equal-channel mold is provided with a corner extrusion cavity for molding a pipe, and the upper core rod II extends into a vertical cavity of the corner extrusion cavity; and a right hydraulic cylinder is further arranged on one side of the lower cross beam and can longitudinally move on the lower cross beam, a piston rod of the right hydraulic cylinder is connected with a right core rod, and the end part of the right core rod extends into the transverse cavity of the corner extrusion cavity and is connected with the bottom end of the upper core rod II in a matched manner.
Preferably, four upright columns are arranged, the four upright columns are respectively connected to four corners of the upper cross beam, the top ends of the four upright columns are connected with the upper cross beam through nut assemblies, and the bottom ends of the four upright columns are connected with the lower cross beam through nut assemblies.
Preferably, a sliding block is fixed on the periphery of the bottom of a piston rod of the middle hydraulic cylinder, and the sliding block is connected with a guide sleeve arranged in the movable cross beam in a sliding fit manner.
Preferably, the first upper core rod is connected with the second upper core rod through a dovetail groove, and the second upper core rod is connected with the right core rod through a dovetail groove.
Preferably, a motor is arranged in an inner cavity of the lower cross beam, a gear is arranged at a power output end of the motor, a rack is arranged at the bottom of the movable workbench opposite to the motor, the gear is meshed with the rack, and the gear drives the rack to drive the movable workbench to move.
Preferably, the right hydraulic cylinder is arranged on the right workbench base, and a slide way is arranged between the right workbench base and the lower cross beam.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the equal-channel extrusion forming hydraulic machine for the pipe provided by the invention utilizes the combined type core rod and the equal-channel angular extrusion process to extrude and process the pipe blank, so that the crystal grains of the pipe blank are refined, the strength of the pipe blank is enhanced, and the product quality and the production efficiency are greatly improved.
2. The hydraulic press for extruding and forming the pipes in the equal channels provided by the invention has the advantages that the grains of the pipe blank are refined, and the strength of the pipe is enhanced; make things convenient for taking out of tubular product, the workstation is established to portable workstation simultaneously, makes things convenient for artifical blowing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a forward structure of an equal-channel extrusion forming hydraulic machine for pipes in the invention;
FIG. 2 is a schematic side structure diagram of an equal-channel extrusion forming hydraulic machine for pipes in the invention;
in the figure: 1-lower beam, 2-upright post, 3-equal channel die, 4-movable beam, 5-upper beam, 6-main hydraulic cylinder, 7-middle hydraulic cylinder, 8-slide block, 9-fixed table, 10-extrusion boss, 11-upper core rod I, 12-upper core rod II, 13-right core rod, 14-right hydraulic cylinder, 15-right working table seat, 16-motor and 17-movable working table.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a hydraulic press for extruding and forming a pipe and other channels, which aims to solve the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The hydraulic press for extrusion forming of the pipe and other channels in the embodiment comprises an upright post 2, an upper beam 5, a movable beam 4 and a lower beam 1, wherein the upper beam 5 is arranged at the top end of the upright post 2, the lower beam 1 is arranged at the bottom end of the upright post 2, the movable beam 4 is arranged between the upper beam 5 and the lower beam 1, a guide hole is formed in the movable beam 4, the upright post 2 is inserted in the guide hole and movably connected, a main hydraulic cylinder 6 is respectively arranged at two sides of the top of the upper beam 5, a cylinder body of the main hydraulic cylinder 6 is fixed on the upper beam 5, a piston rod of the main hydraulic cylinder 6 is connected to the movable beam 4, an extrusion boss 10 is fixed on the bottom end face of the movable beam 4, the extrusion boss 10 is fixed on the movable beam 4 through bolts, and the main hydraulic cylinder 6 moves together with the movable beam 4 to reciprocate by taking the upright post 2 as; the upper cross beam 5 is also provided with a middle hydraulic cylinder 7, the cylinder body of the middle hydraulic cylinder 7 is fixed on the upper cross beam 5, the piston rod of the middle hydraulic cylinder 7 is movably connected with the movable cross beam 4, the bottom of the piston rod of the middle hydraulic cylinder 7 is also provided with a first upper core rod 11, the extrusion boss 10 is sleeved outside the first upper core rod 11, and the bottom of the first upper core rod 11 is connected with a second upper core rod 12;
a movable workbench 17 capable of moving longitudinally is fixed at the top of the lower cross beam 1, an equal-channel mold 3 is fixed at the top of the movable workbench 17, the equal-channel mold 3 is provided with a corner extrusion cavity for molding a pipe, and an upper core rod II 12 extends into a vertical cavity of the corner extrusion cavity; and a right hydraulic cylinder 14 is further arranged on one side of the lower cross beam 1, the right hydraulic cylinder 14 can longitudinally move on the lower cross beam 1, a piston rod of the right hydraulic cylinder 14 is connected with a right core rod 13, and the end part of the right core rod 13 extends into a transverse cavity of the corner extrusion cavity and is connected with the bottom end of the upper core rod two 12 in a matched mode.
In this embodiment, four upright columns 2 are provided, the four upright columns 2 are respectively connected to four corners of the upper cross beam 5, the top ends of the four upright columns 2 are connected with the upper cross beam 5 through nut assemblies, and the bottom ends of the four upright columns 2 are connected with the lower cross beam 1 through nut assemblies.
A sliding block 8 is fixed on the periphery of the bottom of a piston rod of the middle hydraulic cylinder 7, and the sliding block 8 is connected with a guide sleeve arranged in the movable cross beam 4 in a sliding fit manner, so that the piston rod of the middle hydraulic cylinder 7 is guided.
The upper core rod I11 is connected to the bottom end of a piston rod of the middle hydraulic cylinder 7 through a fixing table 9; the upper core rod I11 is connected with the upper core rod II 12 through a dovetail groove, the upper core rod II 12 is connected with the right core rod 13 through a dovetail groove, and the right core rod 13 is connected with the right hydraulic cylinder 14 through a dovetail groove. When the movable table 17 is moved forward by the motor 16, the upper core rod one 11 and the upper core rod two 12, and the right core rod 13 and the right hydraulic cylinder 14 can be separated from each other by shifting forward and backward.
In this embodiment, a motor 16 is disposed in an inner cavity of the lower cross beam 1, a gear is disposed at a power output end of the motor 16, a rack is disposed at a bottom of the opposite movable table 17, the gear is engaged with the rack, the rack is driven by the rotation of the gear to drive the movable table 17 to move, and a slide rail is disposed between the movable table 17 and the lower cross beam 1 to realize sliding guiding.
In this embodiment, the right hydraulic cylinder 14 is disposed on the right work table base 15, and a slide is disposed between the right work table base 15 and the lower beam 1; the whole equipment can be moved back and forth under certain thrust, so that the right core rod 13 and the right hydraulic cylinder 14 are separated and staggered, and the pipes can be taken out conveniently.
Taking a pipe blank with the inner diameter of 110mm, the outer diameter of 220mm and the height of 400mm as an example, the extrusion processing is carried out at room temperature, and the specific operations are as follows:
because the extrusion processing of the first pipe blank has particularity, the processing processes of the first pipe blank and the subsequent pipe blank are described respectively.
Extrusion processing of a first pipe blank:
1. the discharging process of the pipe comprises the following steps:
before the discharging of the pipe is carried out, the right hydraulic cylinder 14 drives the right core rod 13 to feed to a specified position towards the left side, at the moment, the pipe blank is directly placed into a die from an upper side inlet of the equal-channel die 3 (the pipe blank cannot be contacted with the bottom of the die under the limitation of the right core rod 13), then the middle hydraulic cylinder 7 drives the connected upper core rod I11 and the upper core rod II 12 to feed downwards and guide through the sliding block 8, the fact that the upper core rod II 12 can penetrate through the pipe blank placed in the die is guaranteed, meanwhile, the fact that the end portions of the two core rods (the upper core rod II 12 and the right core rod 13) are completely matched is guaranteed, and the arc-shaped core rod is.
2. Extrusion of tubing
And after the blank is placed, the main hydraulic cylinder 6 is utilized to drive the movable cross beam 4 and the extrusion pressure head to move downwards to extrude the tube blank, and the tube blank is extruded to the corner position of the equal-channel extrusion die 3.
Subsequent extrusion processing of the pipe blank:
1. the subsequent tube discharging process comprises the following steps:
after the extrusion processing of the first pipe blank is finished, the main hydraulic cylinder 6 is utilized to move the extrusion pressure head upwards to a reasonable height (the bottom of the extrusion pressure head is ensured to be above the bottom height of the upper core rod I11); then, the equal channel mold 3, the upper core rod two 12 and the right core rod 13 are moved forward by the movable workbench 17, so as to respectively cause the upper core rod one 11 to be separated and dislocated from the upper core rod two 12, and the right core rod 13 to be separated and dislocated from the right hydraulic cylinder 14, and then the pipe blank is sleeved on the upper core rod two 12, the workbench is reset and resets the upper core rod one 11, so that the upper core rod one 11 is re-matched and connected with the upper core rod two 12 and the right core rod 13 and the right hydraulic cylinder 14 (because the first pipe blank is arranged at the corner of the equal channel mold after extrusion processing, the existence of the first pipe blank can ensure that the upper core rod two 12 and the right core rod 13 are still in a combined state and do not deviate from the axis when the upper core rod one 11 is separated and dislocated from the upper core rod two 12 and the right core rod 13 are separated.
2. The extrusion process of the pipe comprises the following steps:
and (3) after the blank is placed to the end, after the core rod is reset, the main hydraulic cylinder 6 is utilized to drive the movable cross beam 4 and the extrusion pressure head to move downwards to extrude the blank of the pipe, when the extrusion pressure head reaches the pressing limit, the material placing process of the pipe in the step 1 is repeated, then the placed pipe is continuously extruded, and the steps 1 and 2 are repeatedly circulated until the pipe is extruded from the left outlet after being extruded at the equal channel corner.
3. The taking-out process of the pipe comprises the following steps:
the right hydraulic cylinder 14 can move back and forth under a certain thrust to separate and dislocate with the right core rod 13, so that the pipe is taken out. After removal, the right hydraulic cylinder 14 is reset and re-engaged with the right core rod 13.
Therefore, the equal-channel extrusion forming process of the pipe can be completed through the steps.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (6)
1. A hydraulic press for equal channel extrusion forming of pipes is characterized in that: the movable cross beam is provided with a guide hole, the upright post is inserted into the guide hole and movably connected, two sides of the top of the upper cross beam are respectively provided with a main hydraulic cylinder, a cylinder body of the main hydraulic cylinder is fixed on the upper cross beam, a piston rod of the main hydraulic cylinder is connected on the movable cross beam, an extrusion boss is fixed on the bottom end surface of the movable cross beam, the upper cross beam is also provided with a middle hydraulic cylinder, a cylinder body of the middle hydraulic cylinder is fixed on the upper cross beam, a piston rod of the middle hydraulic cylinder is movably connected with the movable cross beam, and the bottom of the piston rod of the middle hydraulic cylinder is also provided with a first upper core rod, the extrusion boss is sleeved outside the upper core rod I, and the bottom of the upper core rod I is connected with an upper core rod II.
A movable workbench capable of moving longitudinally is fixed at the top of the lower cross beam, an equal-channel mold is fixed at the top of the movable workbench, the equal-channel mold is provided with a corner extrusion cavity for molding a pipe, and the upper core rod II extends into a vertical cavity of the corner extrusion cavity; and a right hydraulic cylinder is further arranged on one side of the lower cross beam and can longitudinally move on the lower cross beam, a piston rod of the right hydraulic cylinder is connected with a right core rod, and the end part of the right core rod extends into the transverse cavity of the corner extrusion cavity and is connected with the bottom end of the upper core rod II in a matched manner.
2. The hydraulic machine for pipe equal channel extrusion molding according to claim 1, characterized in that: the four upright posts are connected to four corners of the upper cross beam respectively, the top ends of the four upright posts are connected with the upper cross beam through nut assemblies, and the bottom ends of the four upright posts are connected with the lower cross beam through nut assemblies.
3. The hydraulic machine for pipe equal channel extrusion molding according to claim 1, characterized in that: and a sliding block is fixed on the periphery of the bottom of a piston rod of the middle hydraulic cylinder and is connected with a guide sleeve arranged in the movable cross beam in a sliding fit manner.
4. The hydraulic machine for pipe equal channel extrusion molding according to claim 1, characterized in that: the upper core rod I is connected with the upper core rod II through a dovetail groove, and the upper core rod II is connected with the right core rod through a dovetail groove.
5. The hydraulic machine for pipe equal channel extrusion molding according to claim 1, characterized in that: the inner cavity of the lower cross beam is internally provided with a motor, the power output end of the motor is provided with a gear, the bottom of the movable workbench is opposite to the bottom of the movable workbench, the gear is meshed with the gear, and the gear drives the gear to drive the movable workbench to move.
6. The hydraulic machine for pipe equal channel extrusion molding according to claim 1, characterized in that: the right hydraulic cylinder is arranged on the right working table seat, and a slide way is arranged between the right working table seat and the lower cross beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010423158.5A CN111545586A (en) | 2020-05-19 | 2020-05-19 | Equal-channel extrusion forming hydraulic machine for pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010423158.5A CN111545586A (en) | 2020-05-19 | 2020-05-19 | Equal-channel extrusion forming hydraulic machine for pipes |
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| Publication Number | Publication Date |
|---|---|
| CN111545586A true CN111545586A (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010423158.5A Pending CN111545586A (en) | 2020-05-19 | 2020-05-19 | Equal-channel extrusion forming hydraulic machine for pipes |
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| CN (1) | CN111545586A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2584308Y (en) * | 2002-11-15 | 2003-11-05 | 天津理工学院 | Equal-channel corner alternating extruding device |
| KR20050073125A (en) * | 2004-01-08 | 2005-07-13 | 충남대학교산학협력단 | Continuous equal channel angular pressing method and mold being used for the said method, and manufacturing apparatus with the above mold |
| CN102189143A (en) * | 2011-03-24 | 2011-09-21 | 哈尔滨工程大学 | ECAE (equal channel angular extrusion) based preparation method of ultrafine crystal NiTi shape memory alloy tube |
| CN110328250A (en) * | 2019-05-10 | 2019-10-15 | 燕山大学 | A kind of Equal Channel Angular Extrusion Processing method of tubing |
| CN110640137A (en) * | 2019-09-19 | 2020-01-03 | 燕山大学 | Hydraulic press for metal powder sintering and in-situ equal-channel extrusion under atmosphere protection or vacuum and extrusion method |
-
2020
- 2020-05-19 CN CN202010423158.5A patent/CN111545586A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2584308Y (en) * | 2002-11-15 | 2003-11-05 | 天津理工学院 | Equal-channel corner alternating extruding device |
| KR20050073125A (en) * | 2004-01-08 | 2005-07-13 | 충남대학교산학협력단 | Continuous equal channel angular pressing method and mold being used for the said method, and manufacturing apparatus with the above mold |
| CN102189143A (en) * | 2011-03-24 | 2011-09-21 | 哈尔滨工程大学 | ECAE (equal channel angular extrusion) based preparation method of ultrafine crystal NiTi shape memory alloy tube |
| CN110328250A (en) * | 2019-05-10 | 2019-10-15 | 燕山大学 | A kind of Equal Channel Angular Extrusion Processing method of tubing |
| CN110640137A (en) * | 2019-09-19 | 2020-01-03 | 燕山大学 | Hydraulic press for metal powder sintering and in-situ equal-channel extrusion under atmosphere protection or vacuum and extrusion method |
Non-Patent Citations (1)
| Title |
|---|
| 石磊等: "等通道转角分流模挤压AZ31镁合金管材 ", 《材料热处理学报》 * |
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Application publication date: 20200818 |