CN104772524A - Automatic feeding cutter for metal bar stock - Google Patents
Automatic feeding cutter for metal bar stock Download PDFInfo
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- CN104772524A CN104772524A CN201510099292.3A CN201510099292A CN104772524A CN 104772524 A CN104772524 A CN 104772524A CN 201510099292 A CN201510099292 A CN 201510099292A CN 104772524 A CN104772524 A CN 104772524A
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- clamping device
- metal bar
- bar material
- cutting
- feeding
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Abstract
The invention discloses an automatic feeding cutter for a metal bar stock. The automatic feeding cutter for the metal bar stock comprises an automatic feeding mechanism and an automatic cutting mechanism, wherein the automatic feeding mechanism comprises a feeding device and a material clamping device; the feeding device is used for controlling the material clamping device to regulate a position so as to conveniently position the cutting position of the metal bar stock in the material clamping device; the automatic cutting mechanism comprises a saw blade, a first motor and a second motor, wherein the first motor is used for controlling the saw blade to rotate; the saw blade is controlled by the second motor to advance and retreat from the metal bar stock. According to the automatic feeding cutter for the metal bar stock, the ultralong metal bar stock can be automatically fed and cut off, the production efficiency and product quality are improved, enterprise cost is saved, the labor intensity of workers is lightened, and safety is improved.
Description
Technical field
The present invention relates to cut-out technical field of processing equipment, particularly a kind of self-feeding guillotine of metal bar material.
Background technology
A large amount of small-sized handwares is needed in the industry such as wrist-watch, mobile phone, such as " the watchband band grain " of wrist-watch, charger for mobile phone plugs etc., cut off by long strip type metal bar material and form.Traditional production method drives saw blade High Rotation Speed with a threephase asynchronous, then promote charge bar with left hand to enter below saw blade and to clamp bar, then the cutting blade advance of High Rotation Speed is slowly promoted with the right hand, again the cutting blade of High Rotation Speed will be return again after metal bar material is cut off, and then repeating previous action, the metal bar material carried out next time cuts off.
From the above-mentioned description to production process, traditional metal bar material cutting-off method production efficiency is not high, and labor strength greatly and not too safe.And, in the manual process of people, can not ensure that the quality of all over products reaches standard.Particularly very large for cutting into the difficulty that shorter metal bar material does over again, general processing mode is all directly melt, waste casting cost.
From production efficiency, traditional cutting-off method, a cutting equipment needs more than one workman to nurse, and cost of labor is obviously excessive, does not meet the cost-effective requirement of enterprise.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, a kind of self-feeding guillotine of metal bar material is provided, the metal bar material of overlength can be completed automatically feeding and automatically cut off, improve production efficiency and product quality, save the cost of enterprise, decrease the labour intensity of workman and improve security.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of self-feeding guillotine of metal bar material, comprises automatic feed mechanism and automatic cutter structure; Wherein, described automatic feed mechanism comprises pay-off and clamping device, and pay-off controls clamping device and carries out position adjustment, so that the metal bar material be in clamping device is carried out the location of cutting position; The first motor that described automatic cutter structure comprises saw blade, control saw blade rotates and the second motor that control saw blade is retreated to metal bar material.
In technique scheme, described first motor is electric rotating machine, and described second motor is feed servo motor.
In technique scheme, described clamping device comprises the first clamping device and the second clamping device, and the second clamping device and the first clamping device are arranged along the direction of transfer of metal bar material successively; Wherein, the second clamping device is driven by pay-off and does relative motion relative to the first clamping device, to adjust the position of metal bar material leading section in the first clamping device, and positional dissection position; Behind cutting position location, automatic cutter structure cuts the metal bar material in described first clamping device.
In technique scheme, described pay-off comprises feeding cylinder and guide rail, and the output shaft of feeding cylinder transmits with the second clamping device and is connected; Feeding cylinder drives the second clamping device to do relative movement along guide rail direction and the first clamping device.
In technique scheme, described first clamping device comprises material folding cylinder, stationary fixture and floating holder, material folding air cylinder driven floating holder moves, with realize floating holder and stationary fixture near time metal bar material is clamped, floating holder and stationary fixture away from time metal bar material is unclamped.
In technique scheme, be provided with the through hole conformed to metal bar material shape of cross section in described stationary fixture, this through hole can hold metal bar material and pass; Wherein, the outside of described through hole disconnects, and formation has the elastic pressing part suppressing structure, and floating holder is when stationary fixture is close, and floating holder extrudes described elastic pressing part, and this elastic pressing part extrudes to the metal bar material being positioned at through hole again, to realize the effect clamped.
In technique scheme, described first clamping device, second clamping device and the automatic locate mode of pay-off to the cutting position of metal bar material are: the front end portion grips of metal bar material is in the first clamping device, second clamping device unclamps, pay-off drives the second clamping device away from the first clamping device, and stop after arriving predeterminated position, second clamping device clamping, first clamping device unclamps, pay-off drives the second clamping device to move close to the first clamping device again, to adjust the position of cutting position in the first clamping device of metal bar material leading section, after cutting position determines, the first clamping device clamping, the second clamping device continues to keep clamped condition, gets ready for cutting off.
In technique scheme, described automatic feed mechanism and automatic cutter structure are arranged on a workbench, this workbench is provided with the cooling device for cooling cutting work station, this cooling device comprises Oil pump electrical machinery, fuel tank and spray head, cutting fluid in fuel tank is smoked and cutting fluid is sprayed from spray head by pipeline by Oil pump electrical machinery, and the cutting fluid of ejection is back in fuel tank from workbench.
In technique scheme, also comprise the baffle plate by workbench and the parcel of equipment thereon, this baffle plate is provided with smoke exhaust ventilator, alarm lamp and circuit control system, circuit control system and smoke exhaust ventilator, alarm lamp, automatic feed mechanism and automatic cutter structure are electrically connected.
In technique scheme, describedly to the mode that metal bar material cuts be: described second motor drives saw blade to move near the position to be cut of metal bar material with fast forward speed, then implement cutting with work speed, the second last motor drives saw blade to reset with rewind speeds.
The invention has the beneficial effects as follows:
1) due to the bar (usually will being cut into the segment of 2 ~ 120 millimeters) of 2500 millimeters long is placed on bin, and adopt manipulator (the mechanical handing combination be made up of pay-off and clamping device) feeding, thus achieve feeding automation, significantly reduce labour intensity.
2) automatic cutter structure adopts the feeding of Serve Motor Control saw blade, can control feed speed and cut-out stroke easily.Thus realize high efficiency, produce high-quality product.
3) adopt cutting fluid automatically to cool, automatic material receiving, is convenient to automated production.
4) owing to adopting the production method of self-feeding and automatic cutoff, staff obtains liberation, and the thing that operating personnel will do just adds new metal bar material after a long metal bar material has been cut off, and other work is all completed automatically by machine.So workman easily can nurse the machine of more than ten, in other words, adopt present device, workman can complete the workload that more than ten workman's produced in conventional processes complete.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is inner overall structure figure of the present invention;
Fig. 3 is the plan structure schematic diagram of Fig. 2;
Fig. 4 is the structural representation of the first clamping device in the present invention;
Fig. 5 is the side-looking structural representation of Fig. 4.
In figure, 1, bin; 2, pay-off; 3, the first clamping device; 4, the second clamping device; 5, automatic cutter structure; 6, workbench; 7, baffle plate; 8, smoke exhaust ventilator; 9, circuit control system; 10, alarm lamp; 11, cooling device; 12, pulp-collecting box; 21, feeding cylinder; 22, guide rail; 31, the first material folding cylinder; 32, the first stationary fixture; 33, the first floating holder; 321, through hole; 322, elastic pressing part; 41, the second material folding cylinder; 42, the second stationary fixture; 43, the second floating holder; 51, saw blade; 52, electric rotating machine; 53, servomotor; 111, Oil pump electrical machinery; 112, fuel tank; 113, spray head; 114, screen pack.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
As shown in Fig. 1,2,3,4,5, a kind of self-feeding guillotine of metal bar material, comprise automatic feed mechanism and automatic cutter structure 5, metal bar material is positioned on bin 1, one end of metal bar material is inserted in automatic feed mechanism, and by manually setting the first cutting position in automatic feed mechanism, after carrying out first time cutting, what cut is stub bar, needs to remove; After stub bar removes, start automatic locate mode, by the adjustment of automatic feed mechanism to metal bar material position, the follow-up cutting position of metal bar material carries out location, so analogizes; Automatic cutter structure 5 is located startup successfully at metal bar material and is cut to the metal bar material in automatic feed mechanism.
Further, described automatic feed mechanism comprises pay-off 2 and clamping device, and pay-off 2 controls clamping device and carries out position adjustment, so that the metal bar material be in clamping device is carried out the location of cutting position.
Wherein, the first motor that described automatic cutter structure 5 comprises saw blade 51, control saw blade 51 rotates and the second motor that control saw blade 51 is retreated to metal bar material.Described first motor is electric rotating machine 52, and described second motor is feed servo motor 53, and servomotor 53 can control saw blade 51 exactly to the advance and retreat speed of metal bar material and cut-out stroke, thus realizes the production of high efficiency and high-quality.Saw blade 51 is fixedly taken notice of in one end of rotating shaft, and the other end of this rotating shaft is fixed with belt pulley, and the output shaft of electric rotating machine 52 is also provided with belt pulley, and this two belt pulley carries out transmission by belt.The box containing cutting bits is provided with in the below of cutting work station.
Further, described clamping device comprises the first clamping device 3 and the second clamping device 4, second clamping device 4 and the first clamping device 3 and arranges along the direction of transfer of metal bar material successively; Wherein, the second clamping device 4 is driven by pay-off 2 and does relative motion relative to the first clamping device 3, to adjust the position of metal bar material leading section in the first clamping device 3, and positional dissection position; Behind cutting position location, automatic cutter structure 5 cuts the metal bar material in described first clamping device 3.
Wherein, described pay-off 2 comprises feeding cylinder 21 and guide rail 22, and the output shaft of feeding cylinder 21 transmits with the second clamping device 4 and is connected; Feeding cylinder 21 drives the second clamping device 4 to do relative movement along guide rail 22 direction and the first clamping device 3.
Wherein, described first clamping device 3 comprises the first material folding cylinder 31, first stationary fixture 32 and the first floating holder 33, first material folding cylinder 31 drives the first floating holder 33 to move, with realize the first floating holder 33 and the first stationary fixture 32 near time metal bar material is clamped, the first floating holder 33 and the first stationary fixture 32 away from time metal bar material is unclamped.Be provided with the through hole 321 conformed to metal bar material shape of cross section in described first stationary fixture 32, this through hole 321 can hold metal bar material and pass; Wherein, the outside of described through hole 321 disconnects, and formation has the elastic pressing part 322 suppressing structure, first floating holder 33 to the first stationary fixture 32 near time, first floating holder 33 extrudes described elastic pressing part 322, this elastic pressing part 322 extrudes to the metal bar material being positioned at through hole 321 again, to realize the effect clamped.Concrete, first floating holder 33 bottom-hinged is on fixture, the middle part of the first floating holder 33 is provided with an articulated elements, one end of articulated elements is connected with the output shaft of the first material folding cylinder 31, first material folding cylinder 31 is contracted by driver output shaft extension thus drives articulated elements, articulated elements link the first floating holder 33 bottom it centered by rotate, realize the clamping of the first floating holder 33 and the first stationary fixture 32 and unclamp.Wherein, the top of the first floating holder 33 is provided with the gap entered for saw blade 51, and what the top of the first stationary fixture 32 was corresponding is also provided with the gap entered for saw blade 51.Through hole 321 is positioned at the top of the first stationary fixture 32, and through hole 321 is also divided into two parts by this gap.Saw blade 51 cuts the metal bar material be located in this first stationary fixture 32 in this gap.Preferably, the inductor detecting the alignment of metal bar material end face is provided with in the first stationary fixture 32, to regulate the stroke of the first feeding cylinder 21.
Wherein, the second clamping device 4 comprise the second material folding cylinder 41, second stationary fixture 42 and the second floating holder 43, second material folding cylinder 41 control the second floating holder 43 to the second stationary fixture 42 near thus metal bar material is clamped.
Further, described first clamping device 3, the automatic locate mode of the follow-up cutting position (except first time) of the second clamping device 4 and pay-off 2 pairs of metal bar materials is: the front end portion grips of metal bar material is in the first clamping device 3, second clamping device 4 unclamps, pay-off 2 drives the second clamping device 4 away from the first clamping device 3, and stop after arriving predeterminated position, second clamping device 4 clamps, first clamping device 3 unclamps, pay-off 2 drives the second clamping device 4 to move close to the first clamping device 3 again, to adjust follow-up cutting position (except the first time) position in the first clamping device 3 of metal bar material leading section, after follow-up cutting position determines, the first clamping device 3 clamps.After completing the location to the cutting position of metal bar material, just cut, after cutting, first floating holder 33 continues to clamp the metal bar material block cut off, second floating holder 43 unclamps, feeding cylinder 21 drives the second clamping device 4 to move away from the first floating holder 33, and after moving to precalculated position, the metal bar material clamping of the second floating holder 43 pairs of remainders, after second floating holder 43 has clamped, first floating holder 33 unclamps, feeding cylinder 21 drives the metal bar material of the second clamping device 4 and remainder to move close to the first floating holder 33 again, the metal bar material block cut off being arranged in the first stationary fixture 32 ejects by the end of the metal bar material of remainder, and till moving to the follow-up cutting position of the metal bar material of remainder being had good positioning, after follow-up cutting position is had good positioning, the first floating holder 33 grip bar, after the first floating holder 33 has clamped, then cuts next time, so repeats.The metal bar material block cut off is ejected and automatically falls into the pulp-collecting box 12 being arranged in side afterwards, also will through the ladder transmission of two-stage before falling into pulp-collecting box 12, to reduce collision.Further, at every turn when cutting, the first clamping device 3 and the second clamping device 4 are all be in clamped condition.
Further, described automatic feed mechanism and automatic cutter structure 5 are arranged on a workbench 6, this workbench 6 is provided with the cooling device 11 for cooling cutting work station, this cooling device 11 comprises Oil pump electrical machinery 111, fuel tank 112 and spray head 113, cutting fluid in fuel tank 112 is smoked and cutting fluid is sprayed from spray head 113 by pipeline by Oil pump electrical machinery 111, and the cutting fluid of ejection is back in fuel tank 112 from workbench 6.Preferably, before cutting fluid is back to fuel tank 112, also need the screen pack 114 through being arranged on fuel tank 112, to filter the cutting swarf adulterated in cutting fluid, so that cutting fluid recycles.
Further, also comprise the baffle plate 7 by workbench 6 and the parcel of equipment thereon, this baffle plate 7 is provided with smoke exhaust ventilator 8, alarm lamp 10 and circuit control system 9, circuit control system 9 and smoke exhaust ventilator 8, alarm lamp 10, automatic feed mechanism and automatic cutter structure 5 are electrically connected.Baffle plate 7 is splashed to it operating personnel for preventing cutting swarf, ensures the personal safety of operating personnel; And because the cutting fluid of part in use can produce oil smoke, so the working environment of inside and outside are separated, and by smoke exhaust ventilator 8, the oil smoke in baffle plate 7 is taken away.Baffle plate 7 is provided with the transparency window can opening closedown, transparency window is provided with the handle pulled, and transparency window can working condition in viewing hood 7.Circuit control system 9 comprises display screen and controls button.
Wherein, describedly to the mode that metal bar material cuts be: described second motor drives saw blade 51 to move near the position to be cut of metal bar material with fast forward speed, then implement cutting with work speed, the second last motor drives saw blade 51 to reset with rewind speeds.
Operation principle of the present invention:
Prepare, the metal bar material that 2500mm is long is positioned on bin 1, the first clamping device 3 now and the second clamping device 4 are all for releasing orientation, metal bar material are placed in the second clamping device 4, and one end of metal bar material is through the through hole 321 of the first clamping device 3.Carry out initial alignment to the cutting position of every root metal bar material first time cutting by " craft " mode, follow-up off-position carries out following automatic cut-to-length feeding.What first time of every root virgin material cut off is " stub bar ", and stub bar is not generally the product that we need.
Self-feeding, the front end portion grips of metal bar material is in the first clamping device 3, second clamping device 4 unclamps, pay-off 2 drives the second clamping device 4 away from the first clamping device 3, and stop after arriving predeterminated position, the second clamping device 4 clamps, and the first clamping device 3 unclamps, pay-off 2 drives the second clamping device 4 to move close to the first clamping device 3 again, to adjust follow-up cutting position (except the first time) position in the first clamping device 3 of metal bar material leading section; After follow-up cutting position determines, the band cutting position on metal bar material is aimed at saw blade 51, and after cutting position is had good positioning, the first clamping device 3 clamps.After first clamping device 3 has clamped, start surface trimming program.
Surface trimming, after metal bar material location is terminated, saw blade 51 carries out High Rotation Speed under the driving of electric rotating machine 52, and the cutting position moved fast under the driving of servomotor 53 near being in metal bar material in the first clamping device 3, then advance at a slow speed and metal bar material cut off, after cutting off stroke, saw blade 51 is regained fast under the drive of servomotor 53.
Cooling, in the process of cutting, Oil pump electrical machinery 111 startup optimization, carries out spraying cooling from spray head 113 facing to cutting work station by the cutting fluid in fuel tank 112.Cutting fluid to be gathered on workbench 6 and to be back to fuel tank 112, reuses after filtering.
Above embodiment is merely illustrative and not limiting to the invention, therefore all equivalences done according to the method described in patent claim of the present invention change or modify, and are included in patent claim of the present invention.
Claims (10)
1. a self-feeding guillotine for metal bar material, is characterized in that: comprise automatic feed mechanism and automatic cutter structure; Wherein, described automatic feed mechanism comprises pay-off and clamping device, and pay-off controls clamping device and carries out position adjustment, so that the metal bar material be in clamping device is carried out the location of cutting position; The first motor that described automatic cutter structure comprises saw blade, control saw blade rotates and the second motor that control saw blade is retreated to metal bar material.
2. the self-feeding guillotine of a kind of metal bar material according to claim 1, is characterized in that: described first motor is electric rotating machine, and described second motor is feed servo motor.
3. the self-feeding guillotine of a kind of metal bar material according to claim 1, it is characterized in that: described clamping device comprises the first clamping device and the second clamping device, the second clamping device and the first clamping device are arranged along the direction of transfer of metal bar material successively; Wherein, the second clamping device is driven by pay-off and does relative motion relative to the first clamping device, to adjust the position of metal bar material leading section in the first clamping device, and positional dissection position; Behind cutting position location, automatic cutter structure cuts the metal bar material in described first clamping device.
4. the self-feeding guillotine of a kind of metal bar material according to claim 3, is characterized in that: described pay-off comprises feeding cylinder and guide rail, and the output shaft of feeding cylinder transmits with the second clamping device and is connected; Feeding cylinder drives the second clamping device to do relative movement along guide rail direction and the first clamping device.
5. the self-feeding guillotine of a kind of metal bar material according to claim 3, it is characterized in that: described first clamping device comprises material folding cylinder, stationary fixture and floating holder, material folding air cylinder driven floating holder moves, with realize floating holder and stationary fixture near time metal bar material is clamped, floating holder and stationary fixture away from time metal bar material is unclamped.
6. the self-feeding guillotine of a kind of metal bar material according to claim 5, is characterized in that: be provided with the through hole conformed to metal bar material shape of cross section in described stationary fixture, and this through hole can hold metal bar material and pass; Wherein, the outside of described through hole disconnects, and formation has the elastic pressing part suppressing structure, and floating holder is when stationary fixture is close, and floating holder extrudes described elastic pressing part, and this elastic pressing part extrudes to the metal bar material being positioned at through hole again, to realize the effect clamped.
7. the self-feeding guillotine of a kind of metal bar material according to claim 3, it is characterized in that: described first clamping device, second clamping device and the automatic locate mode of pay-off to the cutting position of metal bar material are: the front end portion grips of metal bar material is in the first clamping device, second clamping device unclamps, pay-off drives the second clamping device away from the first clamping device, and stop after arriving predeterminated position, second clamping device clamping, first clamping device unclamps, pay-off drives the second clamping device to move close to the first clamping device again, to adjust the position of cutting position in the first clamping device of metal bar material leading section, after cutting position determines, the first clamping device clamping, the second clamping device continues to keep clamped condition, gets ready for cutting off.
8. the self-feeding guillotine of a kind of metal bar material according to claim 1, it is characterized in that: described automatic feed mechanism and automatic cutter structure are arranged on a workbench, this workbench is provided with the cooling device for cooling cutting work station, this cooling device comprises Oil pump electrical machinery, fuel tank and spray head, cutting fluid in fuel tank is smoked and cutting fluid is sprayed from spray head by pipeline by Oil pump electrical machinery, and the cutting fluid of ejection is back in fuel tank from workbench.
9. the self-feeding guillotine of a kind of metal bar material according to claim 8, it is characterized in that: also comprise the baffle plate by workbench and the parcel of equipment thereon, this baffle plate is provided with smoke exhaust ventilator, alarm lamp and circuit control system, circuit control system and smoke exhaust ventilator, alarm lamp, automatic feed mechanism and automatic cutter structure are electrically connected.
10. the self-feeding guillotine of a kind of metal bar material according to claim 1, it is characterized in that: describedly to the mode that metal bar material cuts be: described second motor drives saw blade to move near the position to be cut of metal bar material with fast forward speed, then implement cutting with work speed, the second last motor drives saw blade to reset with rewind speeds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510099292.3A CN104772524B (en) | 2015-03-06 | 2015-03-06 | A kind of self-feeding guillotine of metal bar material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510099292.3A CN104772524B (en) | 2015-03-06 | 2015-03-06 | A kind of self-feeding guillotine of metal bar material |
Publications (2)
| Publication Number | Publication Date |
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| CN104772524A true CN104772524A (en) | 2015-07-15 |
| CN104772524B CN104772524B (en) | 2017-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510099292.3A Expired - Fee Related CN104772524B (en) | 2015-03-06 | 2015-03-06 | A kind of self-feeding guillotine of metal bar material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105058145A (en) * | 2015-07-28 | 2015-11-18 | 成都市欣欣高强度紧固件制造有限公司 | Automatic feeding equipment for bar cutting |
| CN107127395A (en) * | 2017-07-18 | 2017-09-05 | 台州市中豪机械有限公司 | Metal bar automatic sawing, cutting device |
| CN108015359A (en) * | 2017-12-17 | 2018-05-11 | 江苏日升电力机械有限公司 | A kind of high-strength big-diameter ductile iron pipe production cutter device |
| CN109604661A (en) * | 2017-09-19 | 2019-04-12 | 欧洲钻机有限责任公司 | Double-head drilling equipment and for generate drilling method |
| CN111230212A (en) * | 2018-11-29 | 2020-06-05 | 黄家旺 | Hardware automatic positioning cutting device |
| CN112192256A (en) * | 2020-09-29 | 2021-01-08 | 重庆润跃机械有限公司 | Steel bar cutting system |
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| US3728885A (en) * | 1970-12-11 | 1973-04-24 | Tridan Tool & Machine | Tube bending and sawing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105058145A (en) * | 2015-07-28 | 2015-11-18 | 成都市欣欣高强度紧固件制造有限公司 | Automatic feeding equipment for bar cutting |
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| CN109604661A (en) * | 2017-09-19 | 2019-04-12 | 欧洲钻机有限责任公司 | Double-head drilling equipment and for generate drilling method |
| CN109604661B (en) * | 2017-09-19 | 2021-11-09 | 欧洲钻机有限责任公司 | Double-ended drilling device and method for producing a drilled hole |
| CN108015359A (en) * | 2017-12-17 | 2018-05-11 | 江苏日升电力机械有限公司 | A kind of high-strength big-diameter ductile iron pipe production cutter device |
| CN111230212A (en) * | 2018-11-29 | 2020-06-05 | 黄家旺 | Hardware automatic positioning cutting device |
| CN112192256A (en) * | 2020-09-29 | 2021-01-08 | 重庆润跃机械有限公司 | Steel bar cutting system |
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| Publication number | Publication date |
|---|---|
| CN104772524B (en) | 2017-06-09 |
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