CN208495675U - Intelligent energy-saving overload protection device for crank press - Google Patents
Intelligent energy-saving overload protection device for crank press Download PDFInfo
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- CN208495675U CN208495675U CN201821068764.4U CN201821068764U CN208495675U CN 208495675 U CN208495675 U CN 208495675U CN 201821068764 U CN201821068764 U CN 201821068764U CN 208495675 U CN208495675 U CN 208495675U
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- cylinder body
- spherical bearing
- crank press
- overload protection
- permanent magnet
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- 239000007788 liquid Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 8
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- 239000000463 material Substances 0.000 description 3
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- 239000002245 particle Substances 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 206010016803 Fluid overload Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses an intelligent energy-saving overload protection device of a crank press, an end cover restrains a connecting rod ball head, the connecting rod ball head is installed in a spherical support, the spherical support is arranged in a cylinder body, the bottom of the spherical support is connected with the upper end of a spring, and the lower end of the spring is fixed at the bottom in the cylinder body; an adjusting base plate is arranged at the bottom outside the cylinder body, a pressure sensor is fixed on the adjusting base plate, the adjusting base plate is arranged on the sliding block, and the pressure sensor is connected with a controller through a data line; a plurality of permanent magnets are annularly and vertically arranged along the inner wall of the cylinder body, and the N poles and the S poles of the adjacent permanent magnets are arranged alternately; magnetorheological fluid is filled in the cylinder body; a limit end cover is fixed on the cylinder end cover, and a travel switch connected with the controller through a data line is installed on the limit end cover; the spherical support divides the inner cavity of the cylinder body into an upper part and a lower part which are communicated through a throttling hole on the support; and the support positioned on the inner side of the throttling hole is provided with a coil winding which can generate alternate arrangement with the magnetic pole polarity consistent with that of the permanent magnet.
Description
Technical field
The utility model relates to a kind of metal forming machinery technology, especially a kind of crank press Intelligent energy-saving overload protection
Device.
Background technique
Crank press plays very important effect in tradition machinery processing industry, can be to plate, billot and coiled material
It is sheared, punching, blanking, molding, bending, the processes such as riveted, crank press especially bigger to tonnage, by right
Metal blank, which applies powerful pressure, makes metal that plastic deformation occur and be broken to complete the processing of part.Crank press is in reality
Overload problem is often faced in the production process of border, so that more serious damage can be caused to crank press, especially pair
Large-scale crank press, caused by production loss it is more serious.
In face of the overload problem of crank press, existing solution is either mechanical or fluid pressure type is constantly present
Respective different problems.
Mechanical overload protection device, due to mechanical be collapsed stock material composition itself and the difference of metallographic structure, processing
Error, prevent be collapsed block of material shear strength (shear strength is often the value in a range) and the section of shear are from accurate
It determines, and is easy to cause breaker fatigue fracture when press machine is operated at full capacity for a long time, so being difficult to ensure that overload is protected
The accuracy of protection unit；
And fluid pressure type overload protection arrangement is under pressure the limitation of control valve control pressure, and the control pressure of pressure-control valve
Power will also be influenced by factors, such as the dynamic property of valve, working media viscosity, the limitation of site environment temperature, often
The pressure of control is a range.
These lead to mechanical overload protection device and fluid pressure type overload protection arrangement performance is unstable, accuracy and reliable
Design requirement is not achieved in property, and some does not have accurately protective effect substantially.
Utility model content
Purpose of the utility model is to overcome the deficiencies of the above prior art and provide a kind of crank press intelligence sections
Can overload protection arrangement, the equipment safety efficiently, it is intelligence, energy conservation and environmental protection, at low cost.
To achieve the above object, the utility model adopts the following technical solutions:
A kind of crank press Intelligent energy-saving overload protection arrangement, including crank connecting rod sliding block mechanism, the crank connect
End cap is connected on the sliding block of bar slide block mechanism, end cap constrains the connection rod sphere of connecting rod, and connection rod sphere is mounted on spherical bearing
Spherical groove in, spherical bearing is set in cylinder body, and the bottom of spherical bearing is connect with vertically arranged spring upper end, spring
Bottom in cylinder body is fixed in lower end；
Cylinder body outer bottom is fluted, and adjustment pad is equipped in groove, is fixed with pressure sensor, adjusting pad in adjustment pad
Plate is mounted on sliding block, and pressure sensor is connected by data line with controller；
It is vertically provided with several permanent magnets, and the extremely alternate setting of the pole adjacent permanent magnet N and S along interior wall circular in cylinder body, i.e.,
The pole polarity of permanent magnet is to be arranged alternately；
It is filled with magnetorheological fluid in cylinder body, and is sealed in cylinder body by cylinder end caps on cylinder body and sealing ring；Cylinder body
The limit end cap that extreme higher position is moved up for limiting spherical bearing is fixed on end cap, positive stop end, which covers, is equipped with travel switch,
Travel switch is connected by data line with controller；
Spherical bearing longitudinal direction section be it is inverted T shaped, be made of ferrimagnet, inner chamber of cylinder block is divided by horizontal extension
Lower two parts, upper and lower two parts cavity is by the vertical throttle orifice connection being arranged on horizontal extension, and magnetorheological fluid is through this hole energy
It is flowed in enough upper and lower cavities separated in cylinder body by spherical bearing, effective of the throttle orifice is adjusted by screw closure
Number, control press machine are not detached by severe impact from overload rapidly.
Coil windings are provided on the horizontal extension of support on the inside of throttle orifice；The winding method of coil windings is
Adjacent windings winding current is incorgruous, and for coil windings according to ampere's right handed screw rule in the case where energization, adjacent current is incorgruous
The conjunction magnetic field that generates of winding be similar to the pole N and the pole S of electromagnet, produced by the coil windings of magnetorheological fluid working region
Magnitude of field intensity equal direction produced by magnetic field and the permanent magnet being circular layout on the contrary, and the pole polarity of coil windings and
The configuration of permanent magnet is all unanimously arranged alternately, and when overload, due to the effect in coil windings magnetic field, keeps working region magnetorheological
Liquid loses the constraint in magnetic field, becomes to hold runny liquid, spherical bearing opposing slider can occur relative motion and unload, coil
It is connect by antirotation keys with keyway between spherical bearing where winding and annular spread permanent magnet and is allowed to occur opposite turn
It is dynamic.
The pressure sensor is pasted onto adjustment pad by adhesive.
The controller is made of PLC analog module and Logic control module, is the prior art, details are not described herein.
There is gap between the spherical bearing and inboard wall of cylinder block, magnetorheological fluid can be propped up in cylinder body by spherical shape through this gap
Flowing in the upper and lower cavities that seat separates.
The utility model is in application, when crank press overload, and signal can be transmitted to controller by sensor, the control
Device can allow crank press to stop working, buzzer warning, and coil windings is made to be powered, the coil in magnetorheological fluid working region
The magnetic field that winding generation induced magnetic field is generated with the permanent magnet being circular layout is equal in magnitude contrary, passes through phase interaction between magnetic field
Lost with, working region magnetorheological fluid under the pressure for being strapped in spherical bearing in magnetic field entered by throttle orifice and design gaps it is upper
Chamber, spherical bearing and the decline of connection rod sphere opposing slider height, make crank press detach overload, on sliding block
It moves, when travel switch detects that spherical bearing restores under the action of spring and gravity to original height, coil windings power-off, bee
Ring device stop alarm, and crank press restores normal condition, to realize the overload protection to crank press.
It is insufficient that the utility model overcomes traditional overload protection arrangement, will accurately pressure sensor performance, computer control
The performance (often PLC) of system processed is combined with magnetorheological fluid performance, and realization accurately measures, control in time, unloading rapidly and
It is resetted in time after no big impact, protection.
Replace coil windings to provide magnetic field using the permanent magnet being circular layout, electric energy is saved, it is achieved that crank
Press machine intelligence, energy-saving overload protection, improve the working efficiency of crank press, avoid because crank press overloads
Caused by lose, extend the service life of crank press.Since overload protection arrangement uses highly sensitive power sensing
Device, to ensure that the accuracy of overload protection arrangement, stability and reliability.
Whole system is an energy-saving, intelligentized overload protective device, there is detection, mechanical execution link, control
Link processed, feedback element, ensuring to save electricity to the greatest extent on the basis of realizing crank press overload-protective intelligent
Can, processing cost is reduced, for large-scale multiple spot crank press, multiple protective devices can be used, almost do not have to after overload
It is artificial to participate in just automatically reseting, it does not need to repair, use cost is low.
Detailed description of the invention
Fig. 1 is the cross-sectional view of crank press Intelligent energy-saving overload protection arrangement；
Remove the B-B cross-sectional view of spring, the distribution for the permanent magnet being circular layout in Fig. 2 Fig. 1；
A-A cross-sectional view in Fig. 3 Fig. 1, the distribution for the electromagnetic coil winding that is circular layout；
Fig. 4 is the magnetic pole interaction principle of coil windings and the permanent magnet being circular layout.
In figure: 1. connection rod spheres, 2. limit end caps, 3. spherical bearings, 4. cylinder end caps, 5. sealing rings, 6. magnetorheological fluids,
7. throttle orifice, 8. annular spread permanent magnets, 9. coil windings, 10. springs, 11. pressure sensors, 12. binders, 13. adjustment
Backing plate, 14. cylinder bodies, 15. travel switches, 16. end caps, 17. sliding blocks, 18. antirotation keys.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
This specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate specification revealed interior
Hold, so that those skilled in the art understands and reads, is not intended to limit the utility model enforceable qualifications, therefore not
Has technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are practical new not influencing this
Under the effect of type can be generated and the purpose that can reach, it should all still fall in the revealed technology contents of the utility model and obtain and can contain
In the range of lid.Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term,
It is merely convenient to being illustrated for narration, rather than to limit the enforceable range of the utility model, the change of relativeness or tune
It is whole, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the utility model.
Embodiment is as Figure 1-Figure 4, and wherein Fig. 1 is the section view of crank press Intelligent energy-saving overload protection arrangement
Figure, illustrates the structure of whole device；Fig. 2 is the B-B cross-sectional view for removing spring in Fig. 1, illustrates the permanent magnet being circular layout
Distribution；Fig. 3 is A-A cross-sectional view in Fig. 1, illustrates the distribution map for the electromagnetic coil winding that is circular layout；Fig. 4 is coil windings
With the magnetic pole interaction principle figure for the permanent magnet being circular layout.Crank press Intelligent energy-saving overload protection arrangement, including
Crank connecting rod sliding block mechanism is connected with end cap 16 on the sliding block 17 of the crank connecting rod sliding block mechanism, and end cap 16 constrains connecting rod
Connection rod sphere 1, connection rod sphere 1 is mounted in the spherical groove of spherical bearing 3, and spherical bearing 3 is set in cylinder body 14, and spherical
The bottom of support 3 is connect with vertically arranged 10 upper end of spring, and bottom in cylinder body 14 is fixed in 10 lower end of spring；
14 outer bottom of cylinder body is fluted, and adjustment pad 13 is equipped in groove, is bonded in adjustment pad by binder 12
Pressure sensor 11, adjustment pad 13 are mounted on sliding block 17, and pressure sensor 11 is connected by data line with controller；
Several annular spread permanent magnets 8 are vertically provided with along inner wall in cylinder body 14, and the pole adjacent permanent magnet N and S are extremely alternate
Setting, i.e. the pole polarity of permanent magnet is to be arranged alternately, specific as shown in Figure 2；
It is filled with magnetorheological fluid 6 in cylinder body 14, and passes through cylinder end caps 4 and sealing ring 5 on cylinder body 14 and is sealed in cylinder body
In 14；Magnetic field required for magnetorheological fluid 6 as working media is provided by the permanent magnet being circular layout, and saves electric energy.?
Magnetorheological fluid is divided into two chambers up and down by spherical bearing by set magnetorheological fluid 6 between spherical bearing 3 and cylinder body 14
Body.It is fixed with the limit end cap 2 for moving up extreme higher position for limiting spherical bearing 3 in cylinder end caps 4, limits and is installed on end cap 2
There is travel switch 15, travel switch 15 is connected by data line with controller.
The longitudinal section of spherical bearing 3 be it is inverted T shaped, be made of ferrimagnet, inner chamber of cylinder block is divided by horizontal extension
Upper and lower two parts, upper and lower two parts cavity are connected to by the vertical throttle orifice 7 being arranged on horizontal extension, and magnetorheological fluid is through this hole
It is flowed in the upper and lower cavities that can be separated in cylinder body by spherical bearing；Set throttle orifice is closely-pitched spiral shell on spherical bearing
Pit, by the way that whether mounting screw changes the number of throttle orifice on it, to control magnetorheological fluid in the unit time
Flow, discharge time when overloading crank press are adjusted, and press machine is allowed not rushed acutely from overload rapidly
It detaches with hitting.
Coil windings 9 are provided on the horizontal extension of the support of 7 inside of throttle orifice；Coil windings 9 around prescription
Formula is that 9 electric current of adjacent windings winding is incorgruous, and coil windings 9 are in the case where energization according to ampere's right handed screw rule, adjacent electricity
The pole N and the pole S that the conjunction magnetic field that incorgruous winding generates is similar to electromagnet are flowed, specifically as shown in figure 3, in magnetorheological fluid workspace
Magnetic field produced by the coil windings in domain are powered with magnitude of field intensity equal direction produced by the permanent magnet being circular layout on the contrary,
And what the pole polarity of coil windings and the configuration of permanent magnet were just as being arranged alternately, it is specific as shown in figure 4, when overload,
Due to the effect in coil windings magnetic field, working region magnetorheological fluid is made to lose the constraint in magnetic field, becomes to hold runny liquid, ball
3 opposing slider 17 of shape support occurs relative motion and unloads, spherical bearing 3 and annular spread permanent magnet 8 where coil windings
Between connect with keyway by antirotation keys 18 and be allowed to relatively rotate.
When crank press operating mechanism is under normal operation, due to the strong magnetic for the permanent magnet generation being circular layout
Independent role, the magnetic substance suspended particulate in magnetorheological fluid are magnetized, and link layer structure are arranged in along the magnetic line of force, since magnetic substance suspends
There is interlayer power transmissions between the link layer of particle composition, greatly enhance the magnetorheological fluid shear stress of workspace, at this time magnetic current
The maximum shear stress for becoming liquid is equal to the engineering pressure (this engineering pressure is generally set as overloading threshold) of crank press, from
And it ensure that crank press works normally, and meets the work requirements of crank press.The annular of different magnetic field intensity is installed
The permanent magnet of arrangement can change the compactness of magnetic substance particle link layer, change the interlayer power transmission of link layer accordingly, thus
It is changed magnetorheological fluid yield strength under the action of shear stress, to meet the requirement of different tonnage crank presses.
Controller is made of PLC analog module and Logic control module, is the prior art, details are not described herein.
There are gap and throttle orifice 7 between 14 inner wall of spherical bearing 3 and cylinder body, magnetorheological fluid 6 is through 7 energy of this gap and throttle orifice
It is flowed in enough upper and lower cavities separated in cylinder body 14 by spherical bearing 3.
A kind of overload protection method using crank press Intelligent energy-saving overload protection arrangement, comprising:
1) the pressure sensor accurately operating pressure under real-time detection crank press working condition；In crank press
Under the action of operating pressure, because the piezoelectric effect of itself can generate corresponding electric signal, which sends to pressure sensor
The PLC Analog input mModule of controller, the Analog input mModule of PLC are converted by A/D the pressure sensor of acquisition
Electric signal is converted into digital signal, and the scan period of PLC is generally 1-100ms, at interval of a scan period, inside PLC
Self-checking system all can be compared with pre-set overloading threshold obtained digital signal (generally by the work of crank press
Stroke pressure value is set as overloading threshold), whether detection crank press is in overload, to realize to crank press
The real time monitoring of service load avoids crank press and is in overload shape for a long time since the time scan period of PLC is extremely short
Damage caused by state.The function of controlling unit is mainly completed by the analog module of PLC, Logic control module and relay；
2) when pressure is overloaded, i.e., the working pressure that force sensor measuring goes out is greater than overloading threshold, pressure sensing
Device can generate electric signal under piezoelectric effect, and transfer the signal to the controller, and controller is receiving pressure sensor biography
After the crank press sent crosses electrical signals, controller can be powered to coil windings, buzzer warning, while make crank press
Operating mechanism stops working；
3) permanent magnet 8 being circular layout generates high-intensity magnetic field, so that the magnetic substance suspended particulate in magnetorheological fluid 6 is magnetized, along magnetic
The arrangement of line of force direction, forms space link layer structure along vertical centerline direction inside cylinder body 14, magnetorheological fluid 6 shows at this time
Class solid state enhances the shear stress of magnetorheological fluid 6, is greater than due to the presence of power transmission between magnetic substance suspended particulate link layer
The engineering pressure (this engineering pressure value is generally set as overloading threshold) of crank press, to be played to spherical bearing 3
Enough supporting roles meet the normal work requirement of crank press；
Under crank press normal operating conditions, 9 no power of coil windings, so that electric energy is saved, in crank press
It is just powered to it when overload, after coil windings are powered, due to the coil windings canoe incorgruous using adjacent winding current
And the permanent magnet being circular layout is generated by the way of the pole N and the pole S alternate combinations in magnetorheological fluid working region coil windings
The magnetic field that generates of induced magnetic field and the permanent magnet that is circular layout it is equal in magnitude contrary, the magnetic field generated due to electromagnetic coil
The magnetic field interaction generated with permanent magnet, makes working region magnetorheological fluid lose the constraint in magnetic field, and the magnetic substance in the liquid is outstanding
Floating particles link layer is disintegrated, and runny liquid is just become, and interlayer power transmission disappears, the shear stress and crank press of magnetorheological fluid
Overload pressure compared to being similar to zero；
3) under the action of connection rod sphere and spherical bearing overload pressure, the magnetorheological fluid of cavity of resorption can pass through throttle orifice and ball
Gap between shape support and inboard wall of cylinder block enters the epicoele of spherical bearing, and spherical bearing and connection rod sphere opposing slider generate
The crank connecting rod sliding block mechanism of the relative displacement moved down, press machine has passed through bottom dead centre, makes press machine rapidly from overload shape
It is not detached by severe impact in state, realizes the overload protection to crank press；
4) after crank press, which detaches overload, to be resetted, with the drawback movement of sliding block, at this time spherical bearing and
Connection rod sphere passes through the magnetorheological fluid of epicoele in throttle orifice and spherical bearing and cylinder body under the action of spring force and gravity
Design gaps between wall enter the cavity of resorption of spherical bearing, and then crank connecting rod sliding block mechanism just restores original to before protecting
State；
5) after spherical bearing restores to original height, spherical bearing can touch the stroke covered positioned at positive stop end at this time
Switch, travel switch send a signal to controller, and after receiving feedback signal, Logic control module generates corresponding controller
Logic control signal, control relay are re-energised crank press operating mechanism and power off to coil windings, buzzer
Alarm terminates, and the sliding block of press machine is adjusted to top dead-centre, and the induced magnetic field of coil windings disappears, and makes the magnetorheological fluid of workspace
Magnetic substance suspended particulate re-forms link layer structure under the magnetic field that the permanent magnet being circular layout generates, and crank press restores normal
Work, to realize the Intelligent energy-saving overload protection to crank press.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but it is not practical new to this
The limitation of type protection scope, those skilled in the art should understand that, based on the technical solution of the present invention, ability
Field technique personnel do not need to make the creative labor the various modifications or changes that can be made still in the protection model of the utility model
Within enclosing.
Claims (6)
1. a kind of crank press Intelligent energy-saving overload protection arrangement, characterized in that described including crank connecting rod sliding block mechanism
End cap is connected on the sliding block of crank connecting rod sliding block mechanism, end cap constrains the connection rod sphere of connecting rod, and connection rod sphere is mounted on ball
In the spherical groove of shape support, spherical bearing is set in cylinder body, and the bottom of spherical bearing and vertically arranged spring upper end connect
It connects, lower spring end is fixed on bottom in cylinder body；
Cylinder body outer bottom is fluted, and adjustment pad is equipped in groove, and pressure sensor, adjustment pad peace are fixed in adjustment pad
On sliding block, pressure sensor is connected by data line with controller；
Several permanent magnets are vertically provided with along interior wall circular in cylinder body；Magnetorheological fluid is filled in cylinder body, and by cylinder body
Cylinder end caps and sealing ring are sealed in cylinder body；The limit that extreme higher position is moved up for limiting spherical bearing is fixed in cylinder end caps
Position end cap, positive stop end, which covers, is equipped with travel switch, and travel switch is connected by data line with controller；
Spherical bearing longitudinal direction section be it is inverted T shaped, inner chamber of cylinder block is divide into upper part and lower part by horizontal extension, upper and lower two parts chamber
Body is connected to by the vertical throttle orifice being arranged on horizontal extension；
Coil windings are provided on support horizontal extension on the inside of throttle orifice, the pole polarity of coil windings is handed over after energization
For arrangement；The winding method of coil windings is that adjacent windings winding current is incorgruous, and coil windings are in the case where energization according to peace
Right-hand screw rule is trained, the conjunction magnetic field that the incorgruous winding of adjacent current generates is similar to the pole N and the pole S of electromagnet, magnetorheological
Magnitude of field intensity equal direction produced by magnetic field produced by the coil windings of liquid working region and the permanent magnet being circular layout
On the contrary.
2. crank press Intelligent energy-saving overload protection arrangement as described in claim 1, characterized in that the pressure sensing
Device is pasted onto adjustment pad by adhesive.
3. crank press Intelligent energy-saving overload protection arrangement as described in claim 1, characterized in that adjacent permanent magnet N
Pole and the extremely alternate setting of S, i.e. the pole polarity of permanent magnet is to be arranged alternately.
4. crank press Intelligent energy-saving overload protection arrangement as described in claim 1, characterized in that the controller by
PLC analog module and Logic control module composition.
5. crank press Intelligent energy-saving overload protection arrangement as described in claim 1, characterized in that the spherical bearing
There is gap between inboard wall of cylinder block, is flowed in the upper and lower cavities that magnetorheological fluid can be separated in cylinder body by spherical bearing through this gap
It is dynamic.
6. crank press Intelligent energy-saving overload protection arrangement as described in claim 1, characterized in that coil windings institute
Spherical bearing and annular spread permanent magnet between connect with keyway by antirotation keys, prevent spherical bearing and permanent magnet from sending out
It is raw to relatively rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821068764.4U CN208495675U (en) | 2018-07-06 | 2018-07-06 | Intelligent energy-saving overload protection device for crank press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821068764.4U CN208495675U (en) | 2018-07-06 | 2018-07-06 | Intelligent energy-saving overload protection device for crank press |
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| Publication Number | Publication Date |
|---|---|
| CN208495675U true CN208495675U (en) | 2019-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821068764.4U Expired - Fee Related CN208495675U (en) | 2018-07-06 | 2018-07-06 | Intelligent energy-saving overload protection device for crank press |
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| CN (1) | CN208495675U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856618A (en) * | 2018-07-06 | 2018-11-23 | 青岛理工大学 | Intelligent energy-saving overload protection device and method for crank press |
| CN110000480A (en) * | 2019-05-09 | 2019-07-12 | 江苏大金激光科技有限公司 | A kind of method of high-precision graphite laser cutting machine and its machining high-precision graphite pipe |
-
2018
- 2018-07-06 CN CN201821068764.4U patent/CN208495675U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108856618A (en) * | 2018-07-06 | 2018-11-23 | 青岛理工大学 | Intelligent energy-saving overload protection device and method for crank press |
| CN108856618B (en) * | 2018-07-06 | 2023-08-11 | 青岛理工大学 | Intelligent energy-saving overload protection device and overload protection method for crank press |
| CN110000480A (en) * | 2019-05-09 | 2019-07-12 | 江苏大金激光科技有限公司 | A kind of method of high-precision graphite laser cutting machine and its machining high-precision graphite pipe |
| CN110000480B (en) * | 2019-05-09 | 2023-11-17 | 江苏大金激光科技有限公司 | High-precision graphite laser cutting machine and method for processing high-precision graphite pipe by using same |
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