CN103801756A - On-line servo cutting-to-length device for large-diameter PC steel bars - Google Patents
On-line servo cutting-to-length device for large-diameter PC steel bars Download PDFInfo
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- CN103801756A CN103801756A CN201410032794.XA CN201410032794A CN103801756A CN 103801756 A CN103801756 A CN 103801756A CN 201410032794 A CN201410032794 A CN 201410032794A CN 103801756 A CN103801756 A CN 103801756A
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- hole
- cutter
- cutter platform
- wide guide
- guide rail
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- 229910000831 Steel Inorganic materials 0.000 title abstract 5
- 239000010959 steel Substances 0.000 title abstract 5
- 239000000463 materials Substances 0.000 claims abstract description 23
- 238000010008 shearing Methods 0.000 claims abstract description 22
- 230000000875 corresponding Effects 0.000 claims abstract description 21
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 17
- 230000037250 Clearance Effects 0.000 claims description 7
- 230000035512 clearance Effects 0.000 claims description 7
- 240000006028 Sambucus nigra Species 0.000 claims description 5
- 241000397426 Centroberyx lineatus Species 0.000 claims description 3
- 239000004020 conductors Substances 0.000 claims description 3
- 239000003570 air Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000010586 diagrams Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 239000003082 abrasive agents Substances 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 230000001105 regulatory Effects 0.000 description 2
- 230000003068 static Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering processes Methods 0.000 description 1
- 230000001939 inductive effects Effects 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 238000000034 methods Methods 0.000 description 1
- 230000001737 promoting Effects 0.000 description 1
Abstract
Description
Technical field
The present invention relates to the online specified length shearing apparatus of a kind of hydraulic pressure paddle type mill.
Background technology
Along with expanding economy, architectural engineering industry development is rapid in recent years, and the demand of prestressed concrete pipe pile is further strengthened.Owing to needing a large amount of PC rod irons in the manufacturing process such as prestressed concrete pipe pile, make PC rod iron particularly the accurate shearing blanking of major diameter rod iron become the engineering problem of needing solution badly.Traditional follow-up hydraulic cutter adopts the method for electronics scale that the sheared length of bar is set, and due to the inevitable property that control system postpones, directly causes the precision of cut bar length value poor, even needs secondary operations in the occasion of high-precision requirement; Simultaneously traditional rod iron cutter complex structure, production efficiency is low.
Summary of the invention
The object of the present invention is to provide one simple in structure, easy to use, production efficiency is high, the more accurately online servo-actuated specified length shearing apparatus of Diameter PC rod iron of the online servo-actuated shearing of scale.The present invention changes mechanical rigid scale by the method that increases the free degree into the electronics scale adopting in traditional servo-actuated shear history, in shear history, fixed ruler baffle remains relative static with Fang Daotai, be that upper and lower cutting knife cutting edge is definite value to the distance of fixed ruler baffle, this definite value is the length value that will shear bar.
The present invention mainly comprises: shear dolly, cutting mechanism and material bearing shelf.
Wherein, shearing dolly mainly comprises: vehicle frame, guide wheel, cylindrical guide and with dynamic air cylinder.Vehicle frame is rectangular frame, and framework both sides are respectively equipped with two row's guide wheels up and down, and upper row's guide wheel is positioned at below cylindrical guide, and lower row's guide wheel is positioned at above lower cylindrical guide, makes vehicle frame between upper/lower guide.Cylindrical guide two ends are fixed in the frame of both sides, can or be articulated and connected by screw thread.Vehicle frame front end (with stock supporting mechanism opposite end) bottom is connected with servo-actuated cylinder piston rod, and this servo-actuated cylinder block is fixed on ground.Solenoid control is with dynamic air cylinder, and servo-actuated air cylinder driven vehicle frame, after shear action finishes, promotes vehicle frame with dynamic air cylinder and reset.Vehicle frame middle part is provided with the cubic space being made up of four draw-in grooves of framework, the Fang Daotai of cutting mechanism is located in this cubic space, can in draw-in groove, move by horizontal direction parallel, best, draw-in groove platform surface is provided with high-abrasive material, and draw-in groove front end is provided with backhaul locating piece, on it, has rubber blanket, cushioning effect is played in position while reset in order to controlling party cutter platform simultaneously, avoids rigid collision.
Described cutting mechanism mainly comprises: Fang Daotai, upper cutter, lower cutter, knife rest, hammering hydraulic cylinder, shearing back-moving spring, square cutter platform back-moving spring, square cutter platform back-moving spring guide post, square cutter platform back-moving spring adjusting button and stage clip lid.Side's cutter platform profile is cube, middle part is provided with vertical U-shaped through hole, this U-shaped through hole front portion is provided with the horizontal circle through hole being communicated with it, in this round tube hole, be provided with axle sleeve type lower cutter, this lower cutter inner end end face is concordant with adjacent vertical U shape through-hole wall, on this lower cutter outer end side of being stuck in cutter platform, outside is provided with the end cap of central through hole.In the vertical through hole of above-mentioned side's cutter platform, be provided with the knife rest corresponding with this through hole, this knife rest bottom is provided with inverted U-shaped slotted eye, outside the lower end side of the reaching cutter platform U-shaped through hole of slotted eye two side tool posts, and the lower plane of the set flange side of being stuck in, end top cutter platform.The position adjacent with lower cutter on knife rest inverted U-shaped slotted eye top is provided with dovetail groove, and corresponding swallow-tail form upper cutter packs in dovetail groove.The upper end of cutter platform outside, the above-mentioned knife rest side of being positioned at can contact with hammering hydraulic cylinder piston, and this hammering hydraulic cylinder body is located at vehicle frame top.The top cover of the above-mentioned knife rest side of being positioned at cutter platform outside has a stage clip lid, is provided with the upper end of some vertical shearing back-moving springs in this stage clip lid, and these are sheared in slotted eye corresponding to the cutter platform top, the lower end side of being located at of back-moving springs.On stage clip upper part of the cover knife rest, be provided with through hole, in it, be provided with two ends and stretch out the straight pin of through hole, to be stage clip lid location.The rear end two bottom sides of side's cutter platform is provided with two square cutter platform back-moving spring guide posts, on it, overlap respectively the side's of having cutter platform back-moving spring and spring adjusting button, spring adjusting button is positioned on spring conductor rod by screw, and above-mentioned side's cutter platform back-moving spring guide post coordinates with corresponding body frame structure for automotive part.
Described stock supporting mechanism mainly comprises: material bearing shelf, lacing wire bar, fixed ruler baffle, Trackpad, optoelectronic switch, wide guide rail, Abduction arm and bracket.Wherein, lacing wire bar is two, and their one end is connected with both sides, square cutter platform rear end respectively, and then, respectively through the keeper of fixed ruler baffle, the other end is located by the holder being located on wide guide rail.Two keepers of above-mentioned fixed ruler baffle are with being connected with a T font connecting plate, and these transverse slat both sides, T font connecting plate top are respectively equipped with lacing wire bar and pass and the through hole being connected with clamping position part, and this T font connecting plate middle part riser is arranged in two wide guide clearances.Above-mentioned two lacing wire bars are located at respectively on the wide guide rail of two levels, spacing by being located at holder on wide guide rail, make two lacing wire bars and two wide guide rail parallels.The position that wherein lacing wire bar is positioned at before fixed ruler baffle is provided with Trackpad, and Trackpad is a rectangular thin plate, is fixed on lacing wire bar by the locating piece of its bottom.Above-mentioned two wide guide rails are respectively connected with a material bearing shelf upper bracket, material bearing shelf has several H-shaped lower carriages and the perpendicular inverted U-shaped upper bracket being connected, on, on the connecting plate of support junction, be respectively equipped with and carry out bolted manhole, two bottom surfaces of upper bracket are connected with respectively a wide guide rail, described wide guide rail is provided with slot in corresponding bolt junction, two lateral surfaces of described material bearing shelf upper bracket are respectively equipped with inverted L-shaped plate, be provided with screw in its vertical portion, in screw, establish and adjust gap screw, its end is corresponding with wide guide rail outer face, adjust the gap of gap bolt capable of regulating two wide guide rails by rotation, to adapt to the shearing bar of different-diameter.On wide guide rail before fixed ruler baffle, be provided with optoelectronic switch, the distance of shaft centers that the mounting distance of itself and Trackpad equals knife rest and hammering hydraulic cylinder from.Upper horizon bar corresponding with above-mentioned two wide guide clearances and can support workpiece the connecting lever upper end identical with two is connected by screw, this two connecting levers lower end is connected with a lower horizon bar, these lower horizon bar two ends are located at respectively in the bearing block of two material bearing shelf lower carriages, can make upper horizon bar shift out two guide clearances by horizontally rotating pair, to transfer the bar cutting.On material bearing shelf lower carriage below wide guide rail, be provided with through hole, establish a connecting rod in two lower carriage through holes, upper connecting rod is connected with the upper end of L shaped bracket, and this L shaped bracket lower end is placed on lower link, and the bar cutting is rolled down along inclined-plane.
The present invention compared with prior art tool has the following advantages:
1, adopt mechanical rigid scale thoroughly to solve theoretically the problem that institute's controlled system response delay of the bar length value of cutting affects, improved shear precision.
2, simple in structure, easy to use, save production cost, promote industrialized production efficiency.
Accompanying drawing explanation
Fig. 1 is the three-dimensional simplified schematic diagram of the present invention.
Fig. 2 is that cutting mechanism master of the present invention looks section simplified schematic diagram.
Fig. 3 is that simplified schematic diagram is cutd open by material bearing shelf side-looking of the present invention office.
Fig. 4 is the three-dimensional simplified schematic diagram in material bearing shelf of the present invention top.
In figure: 1-with dynamic air cylinder; 2-backhaul locating piece; 3-cutting mechanism; 4-guide wheel; 5-hammering hydraulic cylinder; 6-vehicle frame; 7-cylindrical guide; 8-lacing wire bar; 9-stock supporting mechanism; 10-Trackpad; 11-optoelectronic switch; 12-fixed ruler baffle; 13-end cap; 14-lower cutter; 15-upper cutter; 16-shearing back-moving spring; 17-knife rest; 18-straight pin; 19-Fang Daotai; 20-spring adjusting button; 21-square cutter platform back-moving spring; 22-stage clip lid; 23-square cutter platform back-moving spring guide post; 24-connecting lever; 25-wide guide rail; 26-tight fixed bolt; 27-tune gap bolt; 28-bracket; 29-material bearing shelf lower carriage; 30-holder; 31-material bearing shelf upper bracket; 32-upper horizon bar; 33-upper connecting rod; 34-lower horizon bar; 35-lower link; 36-inverted L-shaped plate.
The specific embodiment
Below in conjunction with Figure of description, the online servo-actuated specified length shearing apparatus of a kind of Diameter PC rod iron of the present invention is given to more detailed explanation.
In the three-dimensional simplified schematic diagram of the online servo-actuated specified length shearing apparatus of Diameter PC rod iron shown in Fig. 1, vehicle frame 6 is rectangular frame, framework both sides are respectively equipped with two row's guide wheels 4 up and down, and upper row's guide wheel is positioned at below cylindrical guide 7, and lower row's guide wheel is positioned at above lower cylindrical guide.Cylindrical guide two ends are fixed in machine frame at two sides, can pass through screw thread or hinged.Vehicle frame front end (with stock supporting mechanism opposite end) bottom be connected with dynamic air cylinder 1 piston rod, this servo-actuated cylinder block is fixed on ground.Vehicle frame middle part is provided with the cubic space being made up of four draw-in grooves of framework, and the square cutter platform 19 of cutting mechanism is located in this cubic space, and draw-in groove platform surface is provided with high-abrasive material, and draw-in groove front end is provided with backhaul locating piece 2.Look in section simplified schematic diagram the cutting mechanism master of the present invention shown in Fig. 2, side's cutter platform profile is cube, middle part is provided with vertical U-shaped through hole, this through hole front portion is provided with the horizontal circle through hole being communicated with it, in this round tube hole, be provided with axle sleeve type lower cutter 14, this lower cutter inner end end face is concordant with adjacent vertical U shape through-hole wall, and on this lower cutter outer end side of being stuck in cutter platform, outside is provided with the end cap 13 of central through hole.In above-mentioned side's cutter platform vertical U shape through hole, be provided with the knife rest corresponding with this through hole 17, this knife rest bottom is provided with inverted U-shaped slotted eye, outside the lower end side of the reaching cutter platform rectangular through-hole of slotted eye two side tool posts, and the lower plane of the set flange side of being stuck in, end top cutter platform.The position adjacent with lower cutter on knife rest inverted U-shaped slotted eye top is provided with dovetail groove, and corresponding swallow-tail form upper cutter 15 packs in dovetail groove.The upper end of cutter platform outside, the above-mentioned knife rest side of being positioned at can contact with hammering hydraulic cylinder 5 pistons, and this hammering hydraulic cylinder body is located at vehicle frame top.The top cover of the above-mentioned knife rest side of being positioned at cutter platform outside has a stage clip lid 22, is provided with the upper end of some vertical shearing back-moving springs 16 in this stage clip lid, and these are sheared in slotted eye corresponding to the cutter platform top, the lower end side of being located at of back-moving springs.On stage clip upper part of the cover knife rest, be provided with through hole, in it, be provided with two ends and stretch out the straight pin 24 of through hole.The rear end two bottom sides of above-mentioned side's cutter platform is provided with two square cutter platform back-moving spring guide posts 23, on it, overlap respectively the side's of having cutter platform back-moving spring 21 and spring adjusting button 20, spring adjusting button is positioned on spring conductor rod by screw, and above-mentioned side's cutter platform back-moving spring guide post coordinates with through hole on front end vehicle frame.
In the material bearing shelf simplified schematic diagram of the present invention shown in Fig. 3 and Fig. 4, lacing wire bar 8 is two, their one end is threaded with both sides, square cutter platform rear end respectively, and then, respectively through the keeper of fixed ruler baffle 12, the other end is located by the holder 30 being located on wide guide rail 25.Two keepers of above-mentioned fixed ruler baffle are with being connected with a T font connecting plate, and these transverse slat both sides, T font connecting plate top are respectively equipped with lacing wire bar and pass and the through hole being connected with clamping position part, and this T font connecting plate middle part riser is arranged in two wide guide clearances.Above-mentioned two lacing wire bars are located at respectively on the wide guide rail 25 of two levels, spacing by being located at keeper on wide guide rail, make two lacing wire bars and two wide guide rail parallels.The position that wherein lacing wire bar is positioned at before fixed ruler baffle is provided with Trackpad 10, and Trackpad is a rectangular thin plate, is fixed on lacing wire bar by the locating piece of its bottom.Above-mentioned two wide guide rails are respectively connected with a material bearing shelf upper bracket 31, material bearing shelf has several H-shaped lower carriages and the perpendicular inverted U-shaped upper bracket being connected, on, on the connecting plate of support junction, be respectively equipped with and carry out bolted manhole, two of upper bracket connect inner side, bottom surface and are connected with respectively a wide guide rail, described wide guide rail is provided with slot in corresponding bolt junction, two lateral surfaces of described material bearing shelf upper bracket are respectively equipped with inverted L-shaped plate 36, be provided with screw in its vertical portion, in screw, establish and adjust gap screw, its end is corresponding with the contact of wide guide rail outer face.Adjust the gap of gap bolt capable of regulating two wide guide rails by rotation, to adapt to the shearing bar of different-diameter.On wide guide rail before fixed ruler baffle, be provided with optoelectronic switch 11, the distance of shaft centers that the mounting distance of itself and Trackpad equals knife rest and hammering hydraulic cylinder from.Corresponding with above-mentioned two wide guide clearances and can the square-tube-shaped of support workpiece on horizon bar 32 connecting lever 24 upper ends identical with two be connected by screw, this two connecting levers lower end is connected with horizon bar 34 under a tubular, and these lower horizon bar two ends are located at respectively in the bearing block of two material bearing shelf lower carriages 29.On material bearing shelf lower carriage 29 below wide guide rail, be provided with through hole, establish a upper connecting rod 33 in two lower carriage through holes, it is connected with the upper end of L shaped bracket 28, and this L shaped bracket lower end is placed on lower link 35.
The course of work of the present invention is roughly as follows: rod iron passes end cap 13 and lower cutter 14 under the effect of tractive force, enter between two wide guide rails 25 of stock supporting mechanism 9, rod iron moves ahead top to the fixed ruler baffle 12 being fixed on lacing wire bar 8, lacing wire bar 8 side's of drive cutter platforms 19 travel forward together in company with PC rod iron subsequently, meanwhile the square cutter platform back-moving spring 21 compressed accumulation of energys of square cutter platform end.When square cutter platform 19 moves within the scope of the below hammering of hammering hydraulic cylinder 5, Trackpad 10 induction light electric switches 11, optoelectronic switch 11 sends the signal of telecommunication, promoting whole shearing dolly by solenoid control with dynamic air cylinder 1 moves ahead, the piston rod of the hydraulic cylinder of hammering simultaneously 5 stretches out hammering knife rest 17 fast, drives stage clip lid 22 compression shear back-moving springs by the straight pin 18 on knife rest 17, makes its energy storage, and when after upper and lower blade contact cut rod iron, play hydraulic cylinder and shear end cushioning effect.Adopt hydraulic pressure paddle type mill to shear the cross section quality that can effectively improve cut bar, after shear action finishes, pull and shear dolly reset with dynamic air cylinder 1, hammering hydraulic cylinder piston rod is retracted, side's cutter platform back-moving spring 21 and shear back-moving spring 16 respectively the side's of promotion cutter platform 19 and knife rest 17 return to initial position, wait for shear action next time.In whole online servo-actuated cutting to length process, side's cutter platform 19 keeps relative static with fixed ruler baffle 12 all the time, in the side's of being cutter platform, the cutting edge of upper and lower cutting knife and the distance of fixed ruler baffle are definite value, this definite value is the length value that will shear bar, by adjusting fixed ruler baffle 12 positions, can obtain the rod iron of any preseting length.
The above; it is only the preferably specific embodiment of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; the replacement or the change that are equal to according to technical scheme of the present invention and design concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410032794.XA CN103801756B (en) | 2014-01-23 | 2014-01-23 | The online servo-actuated specified length shearing apparatus of Diameter PC rod iron |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032794.XA CN103801756B (en) | 2014-01-23 | 2014-01-23 | The online servo-actuated specified length shearing apparatus of Diameter PC rod iron |
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| CN103801756A true CN103801756A (en) | 2014-05-21 |
| CN103801756B CN103801756B (en) | 2016-01-06 |
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| CN201410032794.XA CN103801756B (en) | 2014-01-23 | 2014-01-23 | The online servo-actuated specified length shearing apparatus of Diameter PC rod iron |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104259548A (en) * | 2014-08-07 | 2015-01-07 | 燕山大学 | Online servo large-diameter bar hydraulic follow-up fixed-length shearing mechanism |
| CN104259552A (en) * | 2014-09-16 | 2015-01-07 | 江苏联峰能源装备有限公司 | Automatic front hydraulic guiding device for big stick hydraulic shear |
| CN104438975A (en) * | 2014-12-11 | 2015-03-25 | 天津鑫坤泰预应力专业技术有限公司 | Pushing type shearing device for prestressed steel strands |
| CN105127757A (en) * | 2015-09-24 | 2015-12-09 | 北京五隆兴机械制造有限公司 | Automatic steel-bar straight-thread threading machining equipment and machining method |
| CN106077795A (en) * | 2016-07-29 | 2016-11-09 | 浙江中创科技有限公司 | Sheet material follow-up cutting device |
| CN107457334A (en) * | 2016-06-03 | 2017-12-12 | 冯广建 | Fluid pressure type wire rod automatic gauging cutting mechanism |
| CN108208875A (en) * | 2017-12-29 | 2018-06-29 | 合肥摩天网络科技有限公司 | A kind of fruit washing apparatus |
| CN109732133A (en) * | 2018-12-28 | 2019-05-10 | 凌云工业股份有限公司汽车零部件研发分公司 | A kind of servo-actuated disconnecting device of uniform section product piece |
| CN110405271A (en) * | 2019-07-29 | 2019-11-05 | 温州翔宇教育科技有限公司 | Corner cutting device is used in a kind of processing of electronic device |
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| CN202239162U (en) * | 2011-09-30 | 2012-05-30 | 襄垣县仁达机电设备有限公司 | Full-automatic precise cut-off machine for cold-drawing roller carrier shaft |
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Patent Citations (5)
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| CN2712518Y (en) * | 2004-07-13 | 2005-07-27 | 韶关学院 | Precision clamp for limiting and shearing bars |
| JP2007054919A (en) * | 2005-08-25 | 2007-03-08 | Ryoei Engineering Kk | Shearing method and device |
| CN101011758A (en) * | 2007-02-02 | 2007-08-08 | 大连三高科技发展有限公司 | Servo-actuated die cutting scale apparatus for steel pipe |
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| CN202239162U (en) * | 2011-09-30 | 2012-05-30 | 襄垣县仁达机电设备有限公司 | Full-automatic precise cut-off machine for cold-drawing roller carrier shaft |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104259548A (en) * | 2014-08-07 | 2015-01-07 | 燕山大学 | Online servo large-diameter bar hydraulic follow-up fixed-length shearing mechanism |
| CN104259548B (en) * | 2014-08-07 | 2016-10-05 | 燕山大学 | Servo major diameter bar hydraulic follow-up cutting to length mechanism online |
| CN104259552A (en) * | 2014-09-16 | 2015-01-07 | 江苏联峰能源装备有限公司 | Automatic front hydraulic guiding device for big stick hydraulic shear |
| CN104259552B (en) * | 2014-09-16 | 2016-08-24 | 江苏联峰能源装备有限公司 | Hydraulic pressure auto-guider before big rod hydraulic shear |
| CN104438975A (en) * | 2014-12-11 | 2015-03-25 | 天津鑫坤泰预应力专业技术有限公司 | Pushing type shearing device for prestressed steel strands |
| CN104438975B (en) * | 2014-12-11 | 2016-04-06 | 天津鑫坤泰预应力专业技术有限公司 | A kind of driving shear of prestress wire |
| CN105127757A (en) * | 2015-09-24 | 2015-12-09 | 北京五隆兴机械制造有限公司 | Automatic steel-bar straight-thread threading machining equipment and machining method |
| CN105127757B (en) * | 2015-09-24 | 2017-06-30 | 北京五隆兴科技发展有限公司 | A kind of automatic reinforced bar straight thread mantle fiber process equipment and processing method |
| CN107457334A (en) * | 2016-06-03 | 2017-12-12 | 冯广建 | Fluid pressure type wire rod automatic gauging cutting mechanism |
| CN107457334B (en) * | 2016-06-03 | 2019-10-29 | 冯广建 | Fluid pressure type wire rod automatic gauging cutting mechanism |
| CN106077795A (en) * | 2016-07-29 | 2016-11-09 | 浙江中创科技有限公司 | Sheet material follow-up cutting device |
| CN108208875A (en) * | 2017-12-29 | 2018-06-29 | 合肥摩天网络科技有限公司 | A kind of fruit washing apparatus |
| CN108208875B (en) * | 2017-12-29 | 2019-12-10 | 安徽顶康食品有限公司 | Fruit cleaning device |
| CN109732133A (en) * | 2018-12-28 | 2019-05-10 | 凌云工业股份有限公司汽车零部件研发分公司 | A kind of servo-actuated disconnecting device of uniform section product piece |
| CN109732133B (en) * | 2018-12-28 | 2020-08-11 | 凌云工业股份有限公司汽车零部件研发分公司 | Follow-up cutting device for fixed-section product piece |
| CN110405271A (en) * | 2019-07-29 | 2019-11-05 | 温州翔宇教育科技有限公司 | Corner cutting device is used in a kind of processing of electronic device |
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|---|---|
| CN103801756B (en) | 2016-01-06 |
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