CN107442692A - A kind of heavy aluminium section bar stretching-machine fracture buffer unit and method - Google Patents
A kind of heavy aluminium section bar stretching-machine fracture buffer unit and method Download PDFInfo
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- CN107442692A CN107442692A CN201710887468.0A CN201710887468A CN107442692A CN 107442692 A CN107442692 A CN 107442692A CN 201710887468 A CN201710887468 A CN 201710887468A CN 107442692 A CN107442692 A CN 107442692A
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- stretching
- cylinder
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- buffering
- machine
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Classifications
-
- 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
- B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
-
- 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
- B21D3/12—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 by stretching with or without twisting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Actuator (AREA)
Abstract
The invention provides a kind of heavy aluminium section bar stretching-machine fracture buffer unit and method, including buffering drawback cylinder and idle running cushion cylinder, the buffering drawback cylinder cylinder body is fixed in Equipment Foundations, piston rod is connected with frame aft, the idle running cushion cylinder cylinder body is connected with stretching head, piston rod one end is connected through main stretching oil cylinder with frame, and the other end is connected with frame positioning cushion dashpot.To work(living caused by apparatus body and basis during by buffering drawback cylinder and idle running cushion cylinder absorption heavy duty industrial aluminium section bar fracture, to improve stressing conditions of the equipment in fracture moment, so as to extend the service life of whole stretching-machine.In addition, equipment Rapid reset can also be made after fracture buffering, to ensure the positioning precision of equipment.
Description
Technical field
The invention belongs to technical field of metallurgical equipment, and in particular to a kind of heavy aluminium section bar stretching-machine fracture buffer unit and
Method.
Background technology
The domestic current offline seven-roll Abramsen machine of middle-size and small-size aluminium uses the inverted center stand under load drawing process of double oil cylinders more,
During fracture, ballistic work is absorbed by stretching master cylinder and Equipment Foundations；For heavy seven-roll Abramsen machine, the main oil of stretching is only relied on
Cylinder and Equipment Foundations absorb fracture ballistic work, and equipment and Hydraulic Power Transmission System can be caused to have a strong impact on, while to equipment base
Plinth it is also proposed higher requirement, it is therefore desirable to which the buffer unit of design specialized absorbs ballistic work, equipment when improving fracture
Instantaneous stressing conditions.
The content of the invention
It is an object of the invention to provide a kind of heavy aluminium section bar stretching-machine fracture buffer unit, it is pulled off to absorb section bar
Moment to impact caused by stretching-machine body and Equipment Foundations, changes force-bearing situation of the stretching-machine in fracture.
Technical scheme provided by the invention is as follows：
A kind of heavy aluminium section bar stretching-machine fracture buffer unit, stretching-machine reset oil in Equipment Foundations, including at least buffering
Cylinder, idle running cushion cylinder and positioning cushion cylinder, the buffering drawback cylinder cylinder body are fixed in Equipment Foundations, and the buffering is multiple
The frame aft of position cylinder piston rod and stretching-machine connects；
The cylinder body of the positioning cushion cylinder is fixed in Equipment Foundations, the piston rod for positioning cushion cylinder and stretching-machine
Frame head is connected, and the idle running cushion cylinder is arranged in the plunger of stretching master cylinder of stretching-machine, the stretching with stretching-machine
Master cylinder forms a combined type stretching oil cylinder.
The stretching-machine includes frame, the stretching head in frame and stretching master cylinder, and the stretching head is in frame
It can be moved along draw direction, the cylinder body of the stretching master cylinder is fixed in frame, the piston rod of the stretching master cylinder and drawing
Extension head connection, frame lower section is Equipment Foundations, and frame can move in Equipment Foundations along draw direction；
The tailpiece of the piston rod of the idle running cushion cylinder is connected through stretching master cylinder with frame, and the other end connects with positioning cushion cylinder
Connect.
The frame includes two crossbeams and multiple slide bearings being vertically arranged, and the buffering drawback cylinder is two
Individual, piston end is connected with two beam-ends of frame respectively, and the stretching master cylinder is two, is respectively arranged on two crossbeams
On, the idle running cushion cylinder is two, is respectively arranged in two stretching master cylinder plungers, and the positioning cushion cylinder is two
Individual, piston end is connected with two crossbeam terminations of frame respectively.
Present invention also offers a kind of heavy aluminium section bar stretching-machine fracture way to play for time, broken using heavy aluminium section bar stretching-machine
Expect buffer unit, in section bar drawing process, buffer drawback cylinder and idle running cushion cylinder is connected with hydraulic oil, when generation fracture
When, buffering drawback cylinder enters row buffering to frame and resetted, and idle running cushion cylinder enters row buffering to stretching head.
A kind of heavy aluminium section bar stretching-machine fracture way to play for time, detailed process are as follows：
Step 1）For heavy aluminium section bar stretching-machine when stretching section bar, moving cart runs to precalculated position, and alignment pin is inserted
In dowel hole in frame, after the jaw clamp system on stretching head and moving cart clamps section bar to be tensioned, buffering is multiple
Position oil cylinder and idle running cushion cylinder are connected with hydraulic oil by hydraulic control system and form setting pressure, and begin in drawing process
This setting pressure is kept eventually, is then stretched and is pressed in master cylinder oil-feed, starts to stretch：
Step 2）Fracture occurs in drawing process, due to stretching the effect of master cylinder, stretching head and the frame with moving cart
Will respectively forwardly, vibration backward, the buffering drawback cylinder being connected due to the left piston chamber with idle running cushion cylinder and with frame
Big chamber maintains the pressure of setting, can provide lasting antidrag to stretching head and frame, make stretching head with it is small with movement
The frame of car is progressively slowed down until stopping, so as to play cushioning effect；
Step 3）After completing buffering, buffering drawback cylinder pushes frame and moving cart to initial position, and is positioned by buffering
Oil cylinder promotes row to be accurately positioned frame.
The beneficial effects of the invention are as follows：
The fracture buffer unit is used on large-scale and heavy industrial aluminum profile seven-roll Abramsen machine, by buffer drawback cylinder and
To ballistic work caused by apparatus body and basis when idle running cushion cylinder absorbs heavy duty industrial aluminium section bar fracture, exist to improve equipment
The stressing conditions of fracture moment, so as to extend the service life of whole stretching-machine.In addition, it can also make to set after fracture buffering
Standby Rapid reset, to ensure the positioning precision of equipment.
It is described in further details below in conjunction with accompanying drawing.
Brief description of the drawings
Fig. 1 is the structure and control oil circuit schematic diagram of the present invention.
In figure：1st, buffers drawback cylinder；2nd, moving cart；3rd, frame；4th, guide rail；5th, master cylinder is stretched；6th, idle running buffers
Oil cylinder；7th, stretching head；8th, cushion cylinder is positioned；9th, drawback cylinder control valve block is buffered；10th, master cylinder control valve block is stretched；11、
Voltage stabilizing make-up valve block；12nd, idle running cushion cylinder control valve block；13rd, cushion cylinder control valve is positioned.
Embodiment
Embodiment 1：
A kind of heavy aluminium section bar stretching-machine fracture buffer unit is present embodiments provided, stretching-machine is in Equipment Foundations, at least
Including buffering drawback cylinder 1, idle running cushion cylinder 6 and positioning cushion cylinder 8, the buffering cylinder body of drawback cylinder 1, which is fixed on, to be set
On the basis of standby, the afterbody of frame 3 of the buffering piston rod of drawback cylinder 1 and stretching-machine connects；
The cylinder body of the positioning cushion cylinder 8 is fixed in Equipment Foundations, the piston rod and stretching-machine of the positioning cushion cylinder 8
The head of frame 3 connection, the idle running cushion cylinder 6 be arranged in stretching-machine stretching master cylinder 5 plunger in, with stretching-machine
Stretch master cylinder 5 and form a combined type stretching oil cylinder.
Idle running cushion cylinder 6 not only plays cushioning effect in fracture to stretching head 7, and can make stretching head 7 in sky
Quickly moved during journey；Buffer drawback cylinder 1 in fracture not only can to frame 3 and moving cart 2 to play cushioning effect, and
Frame 3 can also be made to reset rapidly.
This heavy aluminium section bar stretching-machine fracture buffer unit, is absorbed by buffering drawback cylinder 1 and idle running cushion cylinder 6
To ballistic work caused by frame 3 and Equipment Foundations during heavy duty industrial aluminium section bar fracture, to improve stress of the equipment in fracture moment
Situation, so as to extend the service life of whole stretching-machine；And after completing buffering, drawback cylinder 1 is buffered by frame 3 and movement
Dolly 2 pushes initial position to, and buffering positional cylinder pushes frame 3 to initial position, makes equipment Rapid reset, ensure determining for equipment
Position precision.
Embodiment 2：
On the basis of embodiment 1, a kind of heavy aluminium section bar stretching-machine fracture buffer unit, the stretching are present embodiments provided
Machine includes frame 3, the stretching head 7 in frame 3 and stretching master cylinder 5, and the stretching head 7 can be along stretching side in frame 3
To movement, the cylinder body of the stretching master cylinder 5 is fixed in frame 3, and the piston rod of the stretching master cylinder 5 connects with stretching head 7
Connect, the lower section of frame 3 is Equipment Foundations, and frame 3 can move in Equipment Foundations along draw direction；
The tailpiece of the piston rod of the idle running cushion cylinder 6 is connected through stretching master cylinder 5 with frame 3, the other end and positioning buffering oil
Cylinder 8 connects.Realize resetting of the positioning cushion cylinder 8 to frame 3.
Frame 3 and Equipment Foundations floating connection.Impact when can effectively prevent fracture to Equipment Foundations.
As shown in figure 1, frame 3 includes two crossbeams and multiple slide bearings being vertically arranged, the buffering resets oil
Cylinder 1 is two, and piston end is connected with two beam-ends of frame 3 respectively, and the stretching master cylinder 5 is two, is respectively arranged on
On two crossbeams, the idle running cushion cylinder 6 is two, is respectively arranged in the plunger of two stretching master cylinders 5, and the positioning is slow
Oil cylinder 8 is rushed as two, piston end is connected with two crossbeam head ends of frame 3 respectively.Stretching master cylinder 5 is plunger case, to carry
For main tensile force, idle running cushion cylinder 6 is piston cylinder, to 7 quick idle running of stretching head is mobile and during fracture to stretching head 7
Buffer protection.
Wherein, buffer drawback cylinder 1 and idle running cushion cylinder 5 controls its buffering by hydraulic system and displacement transducer
Power and synchronization.In the present embodiment, hydraulic control system includes 9, two main oil of stretching of a buffering drawback cylinder control valve block
The idle running cushion cylinder control valve of voltage stabilizing make-up valve block 11, two of cylinder control valve block 10, two block 12 and a positioning cushion cylinder
Control valve 13, and be arranged in parallel.Two buffering drawback cylinder 1 rear oil duct in parallel connection buffering drawback cylinder control valve blocks 9, lead to
Cross buffering drawback cylinder control valve block 9 and realize the buffering of buffering drawback cylinder 1 and the Synchronization Control of reseting procedure, two positioning are delayed
8 rear oil duct in parallel of oil cylinder connection positioning cushion cylinder control valve 13 is rushed, is delayed by positioning cushion cylinder control valve 13 and completing to position
The sync buffering and position fixing process of oil cylinder 8 are rushed, two stretching master cylinders 5 are controlled by a stretching master cylinder control valve block 10 respectively
System, the stretching completed when the both sides stress of stretching head 7 is consistent to section bar is realized, two idle running cushion cylinders 6 are respectively by an idle running
Cushion cylinder control valve block 12 controls, two idle running cushion cylinder control valve blocks 12 control idle running cushion cylinder 6 to stretching head
Cushioning effect realizes that voltage stabilizing make-up valve block 11 has two, connected respectively with an idle running cushion cylinder control valve block 12, for oil
The supplement of amount and voltage stabilizing.
Embodiment 3：
On the basis of previous embodiment, a kind of heavy aluminium section bar stretching-machine fracture way to play for time is present embodiments provided, is used
Heavy aluminium section bar stretching-machine fracture buffer unit, in section bar drawing process, buffer drawback cylinder 1 and idle running cushion cylinder 6 is logical
There is hydraulic oil, when fracture occurs, buffering drawback cylinder 1 enters row buffering to frame 3 and resetted, and idle running cushion cylinder 5 is to stretching
First 7 enter row buffering.
Embodiment 4：
A kind of heavy aluminium section bar stretching-machine fracture way to play for time is present embodiments provided, detailed process is as follows：
Step 1）For heavy aluminium section bar stretching-machine when stretching section bar, moving cart 2 runs to precalculated position, and alignment pin is inserted
In dowel hole in frame 3, after the jaw clamp system on stretching head 7 and moving cart 2 clamps section bar to be tensioned, buffering
Drawback cylinder 1 and idle running cushion cylinder 6 are connected with hydraulic oil by hydraulic control system and form setting pressure, and in drawing process
In remain this setting pressure, then stretch the oil-feed of master cylinder 5 on press, start to stretch：
Step 2）Fracture occurs in drawing process, due to stretching the effect of master cylinder 5, stretching head 7 and the machine with moving cart 2
Frame 3 will respectively along guide rail 4 forward, vibration backward, what is be connected due to the left piston chamber with idle running cushion cylinder 6 and with frame 3 is slow
The big chamber for rushing drawback cylinder 1 maintains the pressure of setting, can provide lasting antidrag to stretching head 7 and frame 3, make stretching
First 7 with the frame 3 of moving cart 2 with progressively slowing down until stopping, so as to play cushioning effect；
Step 3）After completing buffering, buffering drawback cylinder 1 pushes frame 3 and moving cart 2 to initial position, buffers positional cylinder
Push frame 3 to initial position.
As do not occurred fracture situation, then one-off drawing process is completed according to normal stretch program, and prepare stretching next time work
Sequence.
Above example belongs to the common knowledge and known technology of the art without the part specifically described, herein
No longer describe in detail one by one.
It is exemplified as above be only to the present invention for example, do not form the limitation to protection scope of the present invention, it is all
It is to be belonged to the same or analogous design of the present invention within protection scope of the present invention.
Claims (5)
1. a kind of heavy aluminium section bar stretching-machine fracture buffer unit, stretching-machine is in Equipment Foundations, it is characterised in that：At least wrap
Include buffering drawback cylinder（1）, idle running cushion cylinder（6）With positioning cushion cylinder（8）, the buffering drawback cylinder（1）Cylinder body is consolidated
It is scheduled in Equipment Foundations, the buffering drawback cylinder（1）The frame of piston rod and stretching-machine（3）Afterbody connects；
The positioning cushion cylinder（8）Cylinder body be fixed in Equipment Foundations, the positioning cushion cylinder（8）Piston rod and drawing
Stretch the frame of machine（3）Head connects, the idle running cushion cylinder（6）It is arranged in the stretching master cylinder of stretching-machine（5）Plunger in,
With the stretching master cylinder of stretching-machine（5）Form a combined type stretching oil cylinder.
A kind of 2. heavy aluminium section bar stretching-machine fracture buffer unit according to claim 1, it is characterised in that：The stretching
Machine includes frame（3）, located at frame（3）On stretching head（7）With stretching master cylinder（5）, the stretching head（7）In frame（3）
On can be moved along draw direction, the stretching master cylinder（5）Cylinder body be fixed on frame（3）On, the stretching master cylinder（5）'s
Piston rod and stretching head（7）Connection, frame（3）Lower section is Equipment Foundations, frame（3）It can be moved in Equipment Foundations along draw direction
It is dynamic；
The idle running cushion cylinder（6）Tailpiece of the piston rod through stretching master cylinder（5）With frame（3）It is connected, the other end and positioning
Cushion cylinder（8）Connection.
A kind of 3. heavy aluminium section bar stretching-machine fracture buffer unit according to claim 1 or 2, it is characterised in that：It is described
Frame（3）Including two crossbeams and multiple slide bearings being vertically arranged, the buffering drawback cylinder（1）For two, piston
End respectively with frame（3）Two beam-ends connection, the stretching master cylinder（5）For two, be respectively arranged on two crossbeams with
Between stretching head, the idle running cushion cylinder（6）For two, two stretching master cylinders are respectively arranged on（5）Plunger in, it is described fixed
Bit buffering oil cylinder（8）For two, cylinder body is fixed in Equipment Foundations, piston rod and frame（3）Two crossbeam terminations connection.
4. a kind of heavy aluminium section bar stretching-machine fracture way to play for time, usage right requires the heavy aluminium section bar described in any one of 1-3
Stretching-machine fracture buffer unit, it is characterised in that：In section bar drawing process, drawback cylinder is buffered（1）With idle running cushion cylinder
（6）Hydraulic oil is connected with, when fracture occurs, buffers drawback cylinder（1）To frame（3）Enter row buffering and reset, idle running buffering oil
Cylinder（5）To stretching head（7）Enter row buffering.
A kind of 5. heavy aluminium section bar stretching-machine fracture way to play for time according to claim 4, it is characterised in that detailed process
It is as follows：
Step 1）Heavy aluminium section bar stretching-machine is when stretching section bar, moving cart（2）Precalculated position is run to, and alignment pin is inserted
Enter frame（3）On dowel hole in, stretching head（7）And moving cart（2）On jaw clamp system section bar to be tensioned is pressed from both sides
It is next, buffer drawback cylinder（1）With idle running cushion cylinder（6）Hydraulic oil is connected with by hydraulic control system and forms setting pressure
Power, and this setting pressure is remained in drawing process, then stretch master cylinder（5）Pressed in oil-feed, start to stretch：
Step 2）Fracture occurs in drawing process, due to stretching master cylinder（5）Effect, stretching head（7）With with moving cart
（2）Frame（3）Will respectively forwardly, vibration backward, due to idle running cushion cylinder（6）Left piston chamber and and frame（3）Even
The buffering drawback cylinder connect（1）Big chamber maintain the pressure of setting, can be to stretching head（7）And frame（3）There is provided lasting
Antidrag, make stretching head（7）With with moving cart（2）Frame（3）Progressively slow down until stopping, making so as to play buffering
With；
Step 3）After completing buffering, drawback cylinder is buffered（1）By frame（3）And moving cart（2）Push initial position to, and pass through
Positional cylinder is buffered to frame（3）It is accurately positioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710887468.0A CN107442692A (en) | 2017-09-27 | 2017-09-27 | A kind of heavy aluminium section bar stretching-machine fracture buffer unit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710887468.0A CN107442692A (en) | 2017-09-27 | 2017-09-27 | A kind of heavy aluminium section bar stretching-machine fracture buffer unit and method |
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| Publication Number | Publication Date |
|---|---|
| CN107442692A true CN107442692A (en) | 2017-12-08 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710887468.0A Pending CN107442692A (en) | 2017-09-27 | 2017-09-27 | A kind of heavy aluminium section bar stretching-machine fracture buffer unit and method |
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Citations (9)
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|---|---|---|---|---|
| GB791867A (en) * | 1955-10-15 | 1958-03-12 | Hydraulik Gmbh | Stretching or rack press |
| JPH02112825A (en) * | 1988-10-20 | 1990-04-25 | Nippon Stainless Steel Co Ltd | Stretcher leveler |
| CN2801316Y (en) * | 2005-06-10 | 2006-08-02 | 西安重型机械研究所 | Hydraulic elongation straightening machine |
| CN101216057A (en) * | 2007-12-29 | 2008-07-09 | 中国重型机械研究院 | Composite hydraulic cylinder with buffer capacity and method |
| CN201753717U (en) * | 2010-08-09 | 2011-03-02 | 江苏华宏科技股份有限公司 | Built-in type quick composite oil cylinder |
| CN103624130A (en) * | 2013-09-17 | 2014-03-12 | 中国重型机械研究院股份公司 | Device with double-direction buffering and resetting functions |
| CN204700089U (en) * | 2015-06-15 | 2015-10-14 | 曾伟根 | A kind of hydraulic stretcher being applicable to large scale aluminium tube |
| CN105587711A (en) * | 2014-11-18 | 2016-05-18 | 扬州市江都永坚有限公司 | Stretching oil cylinder of industrial aluminum profile stretching rolling mill |
| CN105927611A (en) * | 2016-07-12 | 2016-09-07 | 中国重型机械研究院股份公司 | Double-plunger type compound hydraulic cylinder device |
-
2017
- 2017-09-27 CN CN201710887468.0A patent/CN107442692A/en active Pending
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|---|---|---|---|---|
| GB791867A (en) * | 1955-10-15 | 1958-03-12 | Hydraulik Gmbh | Stretching or rack press |
| JPH02112825A (en) * | 1988-10-20 | 1990-04-25 | Nippon Stainless Steel Co Ltd | Stretcher leveler |
| CN2801316Y (en) * | 2005-06-10 | 2006-08-02 | 西安重型机械研究所 | Hydraulic elongation straightening machine |
| CN101216057A (en) * | 2007-12-29 | 2008-07-09 | 中国重型机械研究院 | Composite hydraulic cylinder with buffer capacity and method |
| CN201753717U (en) * | 2010-08-09 | 2011-03-02 | 江苏华宏科技股份有限公司 | Built-in type quick composite oil cylinder |
| CN103624130A (en) * | 2013-09-17 | 2014-03-12 | 中国重型机械研究院股份公司 | Device with double-direction buffering and resetting functions |
| CN105587711A (en) * | 2014-11-18 | 2016-05-18 | 扬州市江都永坚有限公司 | Stretching oil cylinder of industrial aluminum profile stretching rolling mill |
| CN204700089U (en) * | 2015-06-15 | 2015-10-14 | 曾伟根 | A kind of hydraulic stretcher being applicable to large scale aluminium tube |
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| 黄维勇: "12000吨航空级铝合金板材拉伸机装备", 《中国优秀硕士学位论文数据库（电子期刊）》 * |
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Application publication date: 20171208 |