CN109954762B - Large stamping system for machining gearbox oil seal - Google Patents

Large stamping system for machining gearbox oil seal Download PDF

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Publication number
CN109954762B
CN109954762B CN201910319529.2A CN201910319529A CN109954762B CN 109954762 B CN109954762 B CN 109954762B CN 201910319529 A CN201910319529 A CN 201910319529A CN 109954762 B CN109954762 B CN 109954762B
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CN
China
Prior art keywords
roll
driving
rotating
sleeve
stamping
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CN201910319529.2A
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Chinese (zh)
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CN109954762A (en
Inventor
周斌
雷道进
吴伟民
查代佐
雷鹏飞
陈利军
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Suzhou Pro Success Automotive Stamping Co ltd
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Suzhou Pro Success Automotive Stamping Co ltd
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Priority to CN201910319529.2A priority Critical patent/CN109954762B/en
Publication of CN109954762A publication Critical patent/CN109954762A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/16Unwinding or uncoiling
    • B21C47/18Unwinding or uncoiling from reels or drums
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/24Transferring coils to or from winding apparatus or to or from operative position therein; Preventing uncoiling during transfer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002Processes combined with methods covered by groups B21D1/00 - B21D31/00

Abstract

The invention discloses a large stamping system for stamping processing of a gearbox oil seal, which belongs to the technical field of stamping processing equipment and adopts the technical scheme that a strip uncoiling unit comprises a base, a rotating table, material roll fixing devices, a material guide frame, a material roll abutting device and a material roll pressing device, wherein the material roll fixing devices are symmetrically distributed on two opposite side surfaces of the rotating table around the rotating axis of the rotating table in a central mode, the material guide frame is arranged on the bottom surface of one side of the base in a sliding mode, the material roll abutting device is arranged on the material guide frame and used for applying axial pressure to the end surface, far away from the rotating table, of a material roll during uncoiling, and the material roll pressing. When roll up a roll material and unreel, can roll up the fixed material of material in advance in the material of rolling up fixing device department of revolving stage opposite side, change and realize the quick replacement of rolling up the material through revolving stage work when rolling up the material, greatly promoted the efficiency of changing the material and rolling up, and can adapt to the high-efficient stamping process of gearbox oil blanket.

Description

Large stamping system for machining gearbox oil seal
Technical Field
The invention relates to the technical field of stamping equipment, in particular to a large stamping system for processing a gearbox oil seal.
Background
The oil seal is a mechanical element for sealing oil, and separates a part needing lubrication in a transmission part from a force-applying part, so that the lubricating oil is prevented from leaking. The special oil seal in the automobile gearbox in the prior art generally comprises an oil seal framework and rubber, the molding process of the traditional oil seal framework adopts injection molding integrated molding, continuous production cannot be formed in the mode, oil seal framework processing can only be carried out one by one, or multiple injection molding devices are adopted for simultaneous processing, the production efficiency is low, the production cost is high, and therefore metal coiled materials are often adopted as raw materials and are processed and molded by a continuous stamping process.
In the stamping production process of the oil seal framework, the stamping time is far shorter than the auxiliary working time of feeding, blanking and the like, and in order to match with the efficient stamping of stamping equipment, a continuous uncoiling or uncoiling device is often required to be equipped for a punch press. An automatic uncoiling blanking line is disclosed as chinese patent with grant publication No. CN103817532B, which comprises an uncoiling device, a flitch conveying device, a cleaning device, a side guide device, a leveling device, a looper device, a main feeding device, a stamping device, a transmission device and a stacking device, which are connected in sequence, wherein the stacking device comprises a horizontally arranged frame body, at least one stacking lifting platform for receiving the plate is arranged below the frame body, a plurality of beating heads facing the inner side of the frame body are arranged on the frame body, and a multidimensional displacement control mechanism capable of driving the beating heads to change positions is arranged between each beating head and the frame body.
However, its unwinding unit can only be used for once opening a book of coiled material usually, often need halt temporarily after a roll of coiled material finishes using, changes the coiled material, has increased the change of lap material loading time, has restricted the further promotion of machining efficiency.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a large stamping system for processing a gearbox oil seal, which has the advantages of convenience and rapidness in material coil replacement and high stamping efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
a large stamping processing system for processing a gearbox oil seal comprises a strip uncoiling unit, a strip shape correcting unit and a stamping forming unit which are sequentially arranged according to the running direction of a strip, wherein the strip uncoiling unit comprises,
the top surface of the base is provided with a sink groove;
the bottom of the rotating platform is provided with a rotating shaft inserted in the sinking groove, and the sinking groove is internally provided with a driving assembly for driving the rotating shaft to rotate circumferentially; the driving assembly comprises a lever, a ratchet wheel, a pawl and a driving piece for generating push-pull power; the ratchet wheel is coaxially sleeved on the rotating shaft and is fixedly connected with the rotating shaft; the lever is movably sleeved on the rotating shaft and is positioned below the ratchet wheel; one end of the pawl is hinged to the top surface of the lever, and the other end of the pawl is clamped in a tooth groove on the ratchet wheel; the driving piece is arranged on the bottom wall of the sinking groove and is hinged with one end of the lever, which is far away from the rotating shaft;
the material roll fixing devices are distributed on two opposite side surfaces of the rotating platform in a central symmetry manner around the rotating shaft;
the material guide frame is arranged on the ground on one side of the base in a sliding manner, and a plurality of material guide rollers are arranged on the material guide frame;
the material roll abutting device is arranged on the material guide frame and used for applying axial pressure to the end face, away from the rotating table, of the material roll during unwinding;
and the material roll pressing device is arranged at the top of the guide frame and is used for applying radial pressure to the material roll when the material roll is unwound.
By adopting the technical scheme, when the material roll fixing device on one side of the rotating platform is used for uncoiling and feeding, another roll of coiled material can be fixed at the material roll fixing device on the other side of the rotating platform, and when the coiled material is replaced, the rotating platform is driven by the driving assembly to rotate 180 degrees by taking the rotating shaft as the shaft, so that the material roll can be replaced quickly, the efficiency of replacing the material roll is greatly increased, and the time is saved.
When the driving assembly drives the rotating platform to rotate, the driving piece generates thrust, the lever rotates and enables the pawl to push the ratchet wheel to rotate, and therefore the rotating shaft rotates along with the ratchet wheel; when the driving part generates a pulling force, the lever rotates reversely, and because the lever is movably connected with the rotating shaft, the pawl can retreat to the next tooth groove of the ratchet wheel along with the lever in the reverse rotation process, and the rotating shaft does not rotate.
When the material roll is uncoiled, the material roll abutting device abuts against the outer edge of the material roll, and the material roll pressing device abuts against the end face of the material roll, so that the material roll is uncoiled at a slow speed, and the uncoiling caused by the toughness of the metal coiled material is avoided; the material guide frame can play a role in supporting and guiding the material belt, and the problems of scratching and the like which possibly occur in the movement process of the material belt are reduced by the rotation of the material guide roller.
Furthermore, two groups of driving pieces and two groups of pawls are arranged and are distributed in central symmetry around the rotating shaft; the driving piece is a cylinder or a hydraulic cylinder.
Through adopting above-mentioned technical scheme, adopt two sets of driving pieces cooperation to use, power is stronger, can drive the revolving stage rotation fast to switch two places and roll up fixing device's user state.
Further, the material roll fixing device comprises a sleeve pipe which penetrates through the rotating table, the sleeve pipe is rotatably connected with the rotating table, and a first driving mechanism for driving the sleeve pipe to rotate in the circumferential direction is arranged; one end of the sleeve is coaxially provided with a plurality of arc-shaped plates which are distributed around the sleeve; the sleeve is sleeved with a plurality of movable rings, trapezoidal sliding blocks are arranged on the peripheries of the movable rings, and connecting blocks are arranged on the inner sides of the arc plates; the connecting block is provided with a sliding groove for clamping the trapezoidal sliding block, and the sliding groove is axially arranged along the sleeve and gradually becomes shallow towards the direction close to the rotating table; the sleeve is provided with a second driving mechanism for driving the movable ring to axially reciprocate along the sleeve, and a limiting mechanism for limiting the arc plate to axially move along the sleeve is further arranged between the sleeve and the arc plate.
Through adopting above-mentioned technical scheme, each arc is in the state of drawing close relatively during the initial state, will roll up the material cover and establish on each arc, order about with the help of the second driving piece that the movable ring removes. The movable ring drives the trapezoidal sliding block to slide in the sliding groove, and the arc-shaped plate is gradually far away from the sleeve when the trapezoidal sliding block slides to the shallower end of the sliding groove. Due to the existence of the limiting mechanism, the arc-shaped plate cannot be completely separated and expands outwards in a small range in the direction far away from the sleeve, so that the material roll is firmly fixed.
After the material roll is fixed, the sleeve rotates in the circumferential direction under the driving of the first driving mechanism, so that the fixed material roll rotates in the circumferential direction along with the sleeve, and the material roll is unwound slowly.
Further, the first driving part comprises a first motor arranged at the top of the rotating platform, a first gear arranged at the driving end of the first motor and a second gear sleeved on the sleeve, and the first gear and the second gear are driven by a chain.
By adopting the technical scheme, the motor can work after being electrified as a power source, the chain transmission is stable, the rotation speed of the sleeve can be controlled by controlling the rotation speed of the motor, and the uncoiling speed can be controlled conveniently.
Furthermore, the second driving mechanism comprises a movable rod coaxially arranged in the sleeve, one end of the movable rod is connected with an end plate, the other end of the movable rod is connected with a power part for generating push-pull power to drive the movable rod to axially reciprocate along the movable rod, and the power part is arranged at one end, far away from the arc-shaped plate, of the movable rod; the end plates are connected with the movable rings through connecting rods.
Through adopting above-mentioned technical scheme, power portion selects hydraulic cylinder or cylinder all can, and when power portion produced push-and-pull power, the movable rod supported and pushed away the end plate and removed, drives the loose ring through the connecting rod and removes, and then makes trapezoidal slider slide in the spout to make the arc draw close each other or keep away from.
Furthermore, the material roll abutting device comprises a setting frame arranged on the material guide frame and an abutting roller used for abutting against the end face of the material roll, and the length direction of the setting frame is vertical to the length direction of the abutting roller; a sliding block is arranged on the setting frame in a sliding manner along the length direction, and a threaded rod and a guide rod are arranged on the sliding block in a penetrating manner; the length directions of the threaded rod and the guide rod are consistent with the length direction of the setting frame, and one end of the threaded rod is connected with a second motor; one end of the pressing roller is fixed on the sliding block, and the other end of the pressing roller faces the material roll fixing device.
Through adopting above-mentioned technical scheme, the motor drive threaded rod is rotatory, can make the sliding block slide along guide bar length direction. The material roll is fixed in front of the material roll fixing device, so that the sliding block slides towards the direction far away from the rotating platform, and enough space can be reserved for installing the material roll. After the material roll is installed, the sliding block reversely slides until the pressing shaft presses against the end part of the material roll.
Furthermore, the material roll pressing device comprises a supporting arm, a pressing wheel and a third driving part, wherein the supporting arm is connected to the material guide frame in a shaft hinge mode, the pressing wheel is rotatably arranged at one end, far away from the material guide frame, of the supporting arm, and the third driving part is used for driving the supporting arm to rotate around a hinge point; the pressing wheel is provided with a power source for driving the pressing wheel to rotate.
Through adopting above-mentioned technical scheme, it can to support the outer fringe that tight material was rolled up to the pressure wheel through third driving piece drive support arm around the pin joint rotation. In the unwinding process, the power source can drive the pressing wheel to rotate slowly, and the material belt is unwound slowly by matching with the rotation of the material roll.
The material roll lifting device is arranged on the ground on one side of the rotating platform, which is far away from the material guide frame, in a sliding manner; the material roll lifting device comprises a base, a material lifting platform and a jacking mechanism, wherein the base is arranged in a sliding mode, the material lifting platform is used for bearing a material roll, the jacking mechanism is arranged on the base, a V-shaped groove for placing the material roll is formed in the top surface of the material lifting platform, and the bottom surface of the material lifting platform is connected with the jacking mechanism.
Through adopting above-mentioned technical scheme, will roll up the material and place in the top surface that lifts the material platform, lift the material platform with the help of the jacking mechanism jacking for it moves to be used for material to roll up material fixing device and flushes to roll up, then slides the base, and the translation is installed in glassware fixing device to material book, makes to roll up the operation of installing in material book fixing device swift, safe.
Further, lift material platform one side edge and be provided with two a set of material bars along vertical direction, the material bar sets up in V type groove length direction one side and the interval is greater than material book axial width between two material bars.
Through adopting above-mentioned technical scheme, when the material book was placed in lifting the material platform, two striker rods were located the both ends of material book respectively for lifting the material platform and rising or along with the in-process of base translation, material book can stably be placed, has increased the security of material loading.
In conclusion, the invention has the following beneficial effects:
1. two groups of material roll fixing devices are arranged on two sides of the rotating platform in a central symmetry manner, when one material roll fixing device is used for unwinding, the other material roll can be fixed at the other material roll fixing device as a preparation, and the rotating platform is rotated by 180 degrees during roll changing, so that the operation of material roll changing is rapid, and the efficiency of material roll changing operation is greatly improved;
2. the rotating platform is rotationally connected with the base through a rotating shaft and is provided with a ratchet wheel, a pawl, a lever and a driving piece, the power is sufficient, the transmission is stable, and the rotating platform can be driven to rotate directionally;
3. due to the arrangement of the material roll lifting device, the material roll is greatly convenient to be fixed on the material roll fixing device, and the material roll fixing device is safer.
Drawings
FIG. 1 is a schematic structural diagram of a large stamping system for machining an oil seal of a transmission in an embodiment;
FIG. 2 is a first schematic structural diagram of a strip unwinding unit in the embodiment;
FIG. 3 is a cross-sectional view of the turntable and base in an implementation;
FIG. 4 is a schematic structural diagram of a driving assembly in an embodiment;
FIG. 5 is an exploded view of a roll holding device in an embodiment;
FIG. 6 is an enlarged view of portion A of FIG. 5;
FIG. 7 is a sectional view of the turntable in the embodiment;
FIG. 8 is a second schematic structural view of the strip unwinding unit in the embodiment;
FIG. 9 is a diagram showing the operation of the roll lifting device in the embodiment;
FIG. 10 is a schematic structural diagram of a material guide frame, a material roll holding device and a material roll pressing device in the embodiment;
FIG. 11 is a schematic structural view of a material roll hold-down device in an embodiment;
FIG. 12 is a third schematic structural view of a web unwinding unit in the embodiment;
FIG. 13 is a first schematic structural view of the belting orthotic unit of the example;
FIG. 14 is a second schematic structural view of the belting orthotic unit of the example;
FIG. 15 is a third schematic structural view of the belting orthotic unit of the example;
FIG. 16 is a schematic structural view of a press-molding unit in the embodiment;
fig. 17 is an enlarged view of portion B of fig. 16;
FIG. 18 is an enlarged view of portion C of FIG. 16;
FIG. 19 is a diagram of the operation conditions of the large-scale stamping system for machining the gearbox oil seal in the embodiment.
In the figure: 01. a base; 011. sinking a groove; 012. a lever; 013. a drive member; 014. a pawl; 02. a rotating table; 021. a rotating shaft; 211. a ratchet wheel; 022. a sleeve; 221. a second gear; 222. positioning plates; 023. an arc-shaped plate; 231. connecting blocks; 232. a chute; 233. a limit bolt; 024. a movable ring; 241. a trapezoidal slider; 025. a movable rod; 251. a power section; 026. an end plate; 261. a connecting rod; 027. a limiting ring; 271. a limiting notch; 028. a first motor; 281. a first gear; 029. positioning a plate; 03. a material guide frame; 031. a material guiding arm; 311. a material guide roller; 312. a first transmission arm; 313. a first hydraulic cylinder; 032. a rack is arranged; 321. a threaded rod; 3211. a second motor; 322. a guide bar; 323. a sliding block; 324. pressing the roller; 033. a support arm; 331. pressing the wheel; 332. a third motor; 333. a second drive arm; 334. a second hydraulic cylinder; 034. a first rectangular frame; 341. a first screw; 342. a first servo motor; 035. a first bump; 04. a base; 041. a material lifting platform; 042. a jacking mechanism; 043. a V-shaped groove; 044. a material blocking rod; 045. a second rectangular frame; 451. a second screw; 452. a second servo motor; 046. a second bump; 05. an orthopedic box; 051. a feeding frame; 052. a straightening roll; 053. a discharging frame; 531. mounting a rod; 532. a movable block; 533. a driving cylinder; 534. a limiting column; 06. a mounting frame; 061. horizontally moving the frame; 611. a first drive hydraulic cylinder; 062. a vertical sliding frame; 621. a second drive hydraulic cylinder; 063. a sliding arm; 631. a third drive hydraulic cylinder; 064. a mechanical arm; 641. a clamping groove; 065. a material clamping plate; 651. a clamping portion; 652. a fixed part; 653. a clamping groove; 066. a butt plate; 07. an upper die holder; 071. stamping a die; 08. a lower die holder; 081. a sub-mold; 09. a slide rail; 10. a gear lever; 101. tightly abutting against the bolt; 11. a jacking table; 111. a jacking plate; 1111. a snap-fit portion; 1112. a buffer layer; 112. jacking a hydraulic cylinder; 12. a blanking frame; 121. a conveyor belt; 13. and (3) material rolls.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b):
a large stamping system for processing a gearbox oil seal refers to fig. 1 and comprises a strip uncoiling unit, a strip shape correcting unit and a stamping forming unit which are sequentially arranged according to the running direction of a strip. When the device is used for stamping processing of a gearbox oil seal, a metal coiled material serving as a raw material is fixed to a strip uncoiling unit and is slowly uncoiled; straightening and flattening the uncoiled strip by the strip straightening unit and then conveying the strip to the punch forming unit; finally, the strip is subjected to the process steps of wafer falling, stretching, forming, shaping, punching, hole flanging, convex hull punching, trimming and the like at a punch forming unit, so that a stamping part is obtained.
Referring to fig. 1 and 2, the strip unwinding unit includes a base 01, a rotating table 02 disposed above the base 01, a material guide frame 03, and a material roll lifting device. The rotating table 02 is provided with a roll fixing device for fixing the roll 13. The material guide frame 03 is used for supporting and guiding the uncoiled material belt, and a material coil pressing device for applying radial pressure to the material coil 13 and a material coil abutting device for applying axial pressure to the material coil 13 are arranged on the material guide frame 03.
Referring to fig. 3 and 4, the top surface of the base 01 is provided with a sinking groove 011, the bottom surface of the rotating platform 02 is provided with a rotating shaft 021, and the rotating shaft 021 is inserted into the bottom wall of the sinking groove 011 and the sinking groove 011. A lever 012 is arranged in the sinking groove 011 and attached to the bottom wall, and the lever 012 is sleeved on the rotating shaft 021 and can rotate freely with the rotating shaft 021 as the axis. The rotating shaft 021 is sleeved with a ratchet wheel 211, the ratchet wheel 211 is fixed on the rotating shaft 021 and is attached to the top surface of the lever 012. Both ends of the lever 012 are provided with driving members 013, and the driving members 013 can be hydraulic cylinders or air cylinders. In this embodiment, the driving member 013 is a cylinder, and two cylinders as the driving member 013 are centrosymmetrically distributed on the bottom wall of the sinking groove 011 around the rotating shaft 021, and an end of a piston rod of the cylinder is hinged to an end of the lever 012. The top surface of the lever 012 is provided with a pawl 014, one end of the pawl 014 is pivotally connected to the top surface of the lever 012, and the axial direction of the hinge point of the pawl 014 is consistent with the axial direction of the rotating shaft 021. One end of the pawl 014 far away from the hinge point is embedded in the tooth slot of the ratchet wheel 211. When the driving member 013 generates a thrust, the lever 012 rotates; the lever 012 drives the pawl 014 to push the ratchet 211, so as to drive the rotating shaft 021 to rotate; when the driving member 013 generates a pulling force, the lever 012 rotates in the reverse direction, the pawl 014 retracts, and the ratchet 211 and the rotation shaft 021 do not rotate. The two driving members 013 work synchronously to drive the rotating shaft 021 to rotate, and further drive the rotating table 02 to rotate on the top of the base 01.
Referring to fig. 3, two sets of material roll fixing devices for fixing the material roll 13 are provided, and the two sets of material roll fixing devices are respectively disposed on two opposite side surfaces of the rotating platform 02 and are distributed in a central symmetry manner around the rotating axis 021 of the rotating platform 02. By rotating the rotary table 02, two roll holders can be switched to use.
Referring to fig. 5 and 6, the roll fixing device includes a sleeve 022. The surrounding of the one end of sleeve 022 is provided with four arcwall plates 023, and arcwall plate 023 and sleeve 022 coaxial setting, and arcwall plate 023 encircles the equidistant distribution of sleeve 022. Two movable rings 024 are sleeved on the sleeve 022, and a trapezoidal sliding block 241 is arranged on the outer circumferential side wall of each movable ring 024; fixed being provided with connecting block 231 on the medial surface of arc 023, it has spout 232 to open along sleeve 022 axial on the connecting block 231, and trapezoidal slider 241 slides and sets up in spout 232. The center department that is close to sleeve 022 on sleeve 022 is provided with spacing ring 027 coaxially, and spout 232 is along sleeve 022 axial to becoming shallow gradually to being close to spacing ring 027 direction, therefore trapezoidal slider 241 when sliding in spout 232, and arc 023 has the trend that expands outward to keeping away from sleeve 022 direction.
Referring to fig. 5 and 6, a movable rod 025 is coaxially disposed inside the casing 022, an end plate 026 is disposed at one end of the movable rod 025, and a power unit 251 for driving the movable rod 025 to reciprocate along its axial direction is connected to the other end of the movable rod 025. The power unit 251 may be a hydraulic cylinder or an air cylinder, and in this embodiment, an air cylinder is selected as the power unit 251. The end plate 026 and the movable ring 024 are fixedly connected through the connecting rod 261, and the movable ring 024 is provided with two places in this embodiment, and the connecting rod 261 is provided with four altogether and distributes equally spaced along the circumference of sleeve 022. One end of the connecting rod 261 is fixedly connected with the end plate 026, and the other end thereof penetrates through the movable ring 024 close to the end plate 026 and extends to be fixedly connected with the other movable ring 024. The end plate 026 is driven by the movable rod 025 to move the movable ring 024 synchronously, so that the trapezoidal slider 241 slides in the sliding groove 232, and the arc plate 023 is close to the sleeve 022 or far away from the sleeve 022.
Referring to fig. 5 and 6, in order that the arc plate 023 does not move axially along the sleeve 022 when moving, the arc plate 023 is provided with three connection blocks 231. Two limiting bolts 233 penetrate through the connecting block 231 close to the limiting ring 027, a limiting notch 271 for the connecting block 231 penetrating through the limiting bolts 233 to be clamped is formed in the limiting ring 027, and the limiting bolts 233 are symmetrically distributed on two sides of the movable ring 024. Thus, the arcuate plate 023 is only able to move axially along the sleeve 022 to a small extent as it moves. When the material roll 13 is fixed, the four arc-shaped plates 023 are simultaneously inserted into the central hole of the material roll 13; under the driving of the power part 251, the movable rod 025 drives the end plate 026 to move, the connecting rod 261 drives the movable ring 024 to move, so that the trapezoidal sliding block 241 slides from the deeper end to the shallower end in the sliding groove 232 on the connecting block 231, and the arc-shaped plate 023 expands outwards in the direction away from the sleeve 022, thereby firmly fixing the material roll 13.
Referring to fig. 7, a sleeve 022 of the roll fixing device is disposed through the rotating table 02 such that the arc plate 023 and the power part 251 are respectively located at both sides of the rotating table 02. The sleeve 022 is coaxially provided with a second gear 221 and an annular spacer 222 at an inner portion of the rotary table 02. The top surface of revolving stage 02 is provided with first motor 028, and the drive end of first motor 028 is connected with first gear 281. The first gear 281 and the second gear 221 are driven by a chain (not shown). After the roll 13 is fixed, the first motor 028 is powered on, and the sleeve 022 is slowly rotated by the chain transmission between the first gear 281 and the second gear 221, so as to unwind the roll 13.
Referring to fig. 7, in order to increase the rotation stability of the sleeve 022 when the material roll 13 is unwound, a positioning plate 029 parallel to the top plate of the rotating table 02 is further arranged inside the rotating table 02, and a linear groove for the positioning sheet 222 to be clamped is formed in the positioning plate 029. When sleeve 022 is rotatory, spacer 222 is at a style of calligraphy inslot rotation, does not hinder spacer 222 and rotates along with sleeve 022 is rotatory, and can play the effect of restriction sleeve 022 along self axial skew, has increased the rotational stability of sleeve 022 when material book 13 is unreeled.
Referring to fig. 8 and 9, in order to lift and fix the heavier metal coil 13 to the coil fixing means, the present embodiment is further equipped with a coil lifting means. The material roll lifting device comprises a base 04 arranged in a sliding mode, a material lifting platform 041 located above the base 04, and a jacking mechanism 042. The bottom of the base 04 is provided with a second rectangular frame 045, a second screw 451 is arranged on the second rectangular frame 045 along the length direction, and a second servo motor 452 for driving the second screw 451 to rotate is arranged at the end of the second screw 451. The bottom surface of the base 04 is provided with a second protrusion 046, and the second screw 451 is disposed through the second protrusion 046. When the second servo motor 452 drives the second screw 451 to rotate, the second bump 046 moves along the length direction of the second screw 451, so that the base 04 slides along the length direction of the second rectangular frame 045. In order to reduce the sliding resistance of the base 04, the four corners of the bottom surface of the base 04 are provided with rollers, so that the base 04 can slide more smoothly. The jacking mechanism 042 includes cylinders disposed at four corners of the top surface of the base 04, and the movable ends of the cylinders are connected to the bottom surface of the material lifting platform 041. When the jacking mechanism 042 generates a pushing force, the material lifting table 041 is pushed to move upwards; otherwise, the material lifting platform 041 moves downward.
Referring to fig. 8 and 9, a V-shaped groove 043 is formed in the top surface of the material lifting platform 041, two material blocking rods 044 are arranged on one side of the V-shaped groove 043 in the length direction, and the material blocking rods 044 are arranged perpendicular to the top surface of the base 04. When the material roll lifting device is used, as shown in fig. 9, the material roll 13 is placed at the V-shaped groove 043 on the top surface of the material lifting platform 041, so that the axial direction of the material roll 13 is consistent with the length direction of the V-shaped groove 043. The material blocking rods 044 are respectively clamped at two axial ends of the material coil 13, so that the material coil 13 can be stably placed in the process of rising or translating along with the material lifting platform 041.
Referring to fig. 8 and 9, during loading, the material roll 13 is first placed on the top surface of the material lifting platform 041, and the jacking mechanism 042 generates a thrust to drive the material lifting platform 041 to move upwards. When the material roll 13 rises to the height of the material roll fixing device, the second servo motor 452 is powered on to work, and the base 04 slides towards the direction close to the rotating platform 02 through the matching of the second screw 451 and the second bump 046 until the material roll 13 is clamped and embedded in the material roll fixing device. Then, the jacking device generates a pulling force, and the material lifting platform 041 and the material blocking rod 044 move downwards to be separated from the material coil 13.
Referring to fig. 8 and 10, a material guide frame 03 is slidably arranged on one side of the base 01 away from the material roll lifting device, and the sliding direction of the material guide frame 03 is perpendicular to the sliding direction of the base 04. The bottom of the guide frame 03 is provided with a first rectangular frame 034, a first screw 341 is arranged on the first rectangular frame 034 along the length direction, and the end of the first screw 341 is connected with a first servo motor 342. The bottom of the material guiding frame 03 is provided with a first projection 035, and the first screw 341 is arranged to penetrate through the first projection 035. After the first servo motor 342 is powered on, the first screw 341 rotates, and the guide frame 03 slides along the length direction of the first rectangular frame 034 through the cooperation between the first screw 341 and the first protrusion 035. The material guide frame 03 is arranged in a sliding manner, so that the material guide frame 03 can slide away from the rotating platform 02 before the rotating platform 02 rotates, and the material guide frame 03 cannot block the rotating platform 02 to rotate. Meanwhile, the sliding of the material guide frame 03 can also adjust the distance from the material roll abutting device arranged on the material guide frame 03 and the distance from the material roll pressing device to the fixing device of the material roll 13 on the rotating platform 02, so that the material guide frame can adapt to the uncoiling and feeding of the material rolls 13 with different sizes.
Referring to fig. 10 and 11, the material roll tightening device includes a setting frame 032 disposed on the material guide frame 03, wherein the setting frame 032 is formed by four rectangular plates connected end to end and is in a rectangular frame shape. Two guide rods 322 are arranged in parallel along the length direction on the setting rack 032, and a sliding block 323 in the setting rack 032 is sleeved on the guide rods 322 together. The sliding block 323 is fixedly provided with a pressing roller 324, and the axial direction of the pressing roller 324 is perpendicular to the length direction of the setting frame 032 and the length direction of the guide rod 322. The setting rack 032 is further provided with a threaded rod 321 penetrating through the sliding block 323, and one end of the threaded rod 321 is connected with a second motor 3211 fixed to the end of the setting rack 032. The second motor 3211 is energized to drive the threaded rod 321 to rotate, and the sliding block 323 is driven to slide along the length direction of the guide rod 322 to change the position of the pressing roller 324.
Referring to fig. 10 and 12, the material roll pressing device includes a supporting arm 033 with one end connected to the top of the material guide frame 03 in a hinged manner, a pressing wheel 331 is disposed at one end of the supporting arm 033 away from the material guide frame 03, a third motor 332 for driving the pressing wheel 331 to rotate is disposed on the supporting arm 033, and a second transmission arm 333 is connected to a hinged shaft of the supporting arm 033. The inside second hydraulic cylinder 334 that is provided with of guide frame 03, the one end that the support arm 033 is kept away from to second transmission arm 333 is articulated with the movable end of second hydraulic cylinder 334. When the second hydraulic cylinder 334 generates push-pull power, the support arm 033 is driven by the second driving arm 333 to rotate around the hinge joint, so that the pressing wheel 331 at the end of the support arm 033 is close to or far away from the rotating table 02. When the material roll is unwound, the pressing wheel 331 presses against the outer edge of the material roll 13, and the pressing wheel 331 slowly rotates to cooperate with the material roll 13 to rotate and unwind under the driving of the third motor 332. Before the material roll 13 is replaced by rotating the rotating platform 02, the supporting arm 033 is rotated until the pressing wheel 331 is far away from the rotating platform 02, so that the rotating platform 02 is not hindered from rotating.
Referring to fig. 10 and 12, a material guiding arm 031 is further disposed on one side of the material guiding frame 03 close to the rotating platform 02, and a plurality of material guiding rollers 311 having an axial direction consistent with that of the material roll 13 are disposed on the material guiding arm 031. The material guiding arm 031 is arc-shaped, and one end is hinged to the material guiding frame 03. A first hydraulic cylinder 313 is arranged in the material guide frame 03, and a first transmission arm 312 is hinged to the movable end of the first hydraulic cylinder 313. One end of the first transmission arm 312 away from the first hydraulic cylinder 313 is fixed to a hinge shaft of the guide arm 031. When the first hydraulic cylinder 313 generates the pushing and pulling power, the first transmission arm 312 drives the material guiding arm 031 to rotate around the hinge joint, so as to change the height of the material guiding roller 311 installed on the material guiding arm 031. The strip unwound from the material roll 13 moves under the support of the material guide roller 311, and is not easy to scratch.
Referring to fig. 13, 14 and 15, the belting orthotic device is the same as the prior art belting orthotic device used in a press working system and includes an orthotic box 05 and sets of orthotic rolls 052 disposed within the orthotic box 05. When the strip passes through the straightening box 05, the strip is straightened and flattened under the rolling pressure of the straightening rollers 052. The feeding end of the shape correcting box 05 is provided with a rotatable feeding frame 051, and a plurality of rollers for conducting belt materials are arranged on the feeding frame 051. The discharge end of the orthopedic box 05 is provided with a discharge frame 053, two mounting rods 531 are arranged on the discharge frame 053 in parallel, and two movable blocks 532 are sleeved on the mounting rods 531. Each movable block 532 is provided with a limit post 534 perpendicular to the mounting rod 531, one movable block 532 is fixedly arranged, and the other movable block 532 is connected with a driving cylinder 533. Under the driving of the driving cylinder 533, the movable block 532 can move closer to or away from the fixed movable block 532, so as to change the distance between the two limiting posts 534. The reshaped band travels in a direction perpendicular to the mounting bar 531, passing between the two restraint posts 534, so that the band enters the subsequent press processing unit in a specific position.
Referring to fig. 16 and 17, the stamping unit is a forming part of stamping of a stamping part, and includes an upper die holder 07 and a lower die holder 08, the lower die holder 08 is provided with sub dies 081, the number of which is the same as that of the steps of the workpiece stamping process, along the length direction, and the upper die holder 07 is provided with a stamping die 071 for matching the sub dies 081 to perform stamping.
Referring to fig. 16 and 17, transfer of the stamping between the sub-dies 081 is accomplished by a robotic arm 064. In this embodiment, two mechanical arms 064 are arranged along the length direction of the lower die holder 08, and each mechanical arm 064 is provided with material clamping plates 065, the number of which is the same as that of the sub-dies 081. The material clamping plates 065 on the two mechanical arms 064 are arranged oppositely to be used for clamping the stamping parts in a matching manner. The retainer plate 065 includes a retainer 651 and a fixing portion 652 which are integrally formed, the fixing portion 652 is fixed to the robot arm 064 by bolts, and a semicircular retainer groove 653 is formed at an end of the retainer 651. When the two material clamping plates 065 arranged oppositely are closed, the clamping grooves 653 are matched with each other to clamp a circular stamping part.
Referring to fig. 16 and 17, the lower die holder 08 is provided at both ends in the length direction with mounting brackets 06. Two horizontal smooth moving frames 061 are arranged on the mounting frame 06 in a sliding mode in the length direction perpendicular to the mechanical arm 064, and a first driving hydraulic cylinder 611 is arranged on the mounting frame 06 to provide push-pull power to enable the two horizontal smooth moving frames 061 on the same mounting frame 06 to be far away from or close to each other. The horizontal sliding frame 061 is provided with a vertical sliding frame 062 in a sliding manner, and the horizontal sliding frame 061 is provided with a second driving hydraulic cylinder 621. When the second driving hydraulic cylinder 621 generates the push-pull power, the vertical sliding frame 062 slides in the vertical direction on the horizontal sliding frame 061. The bottom end of the vertical sliding frame 062 is provided with a sliding arm 063 in a sliding manner, and the length direction of the sliding arm 063 is consistent with the length direction of the mechanical arm 064. The vertical sliding frame 062 is provided with a third driving hydraulic cylinder 631 for generating push-pull power to drive the sliding arm 063 to slide along the length direction thereof. The sliding directions of the horizontal sliding frame 061, the vertical sliding frame 062 and the sliding arm 063 are mutually perpendicular. The ends of the mechanical arm 064 are connected to the ends of a respective one of the side sliding arms 063.
Referring to fig. 16 and 18, the end of the robot arm 064 and the end of the sliding arm 063 are both provided with a butt plate 066, and when the robot arm 064 and the sliding arm 063 are connected, the butt plate 066 is aligned and fixed by inserting a bolt. The connected mechanical arm 064 can slide in the length direction, the vertical direction and the horizontal direction along with the movement of the horizontal sliding frame 061, the vertical sliding frame 062 and the sliding arm 063, so as to complete the clamping transfer of the stamping part. The tail end of the lower die base 08 is also provided with a blanking frame 12, and the blanking frame 12 is provided with a conveyor belt 121. The finally punched stamped part is transferred to the conveyor belt 121 under the clamping of the clamping plate 065 on the robot arm 064. When the two mechanical arms 064 are separated, the stamped part falls on the conveyor belt 121 and is guided out.
Referring to fig. 16 and 18, in order to increase the convenience of assembling and disassembling the mold, two mutually parallel slide rails 09 are arranged on the floor of the workshop along the length direction perpendicular to the lower die holder 08, and the lower die holder 08 is slidably arranged on the slide rails 09. When the die needs to be disassembled and assembled, the lower die holder 08 can be slid out of the working area by means of the sliding rail 09, so that the operable space for disassembling and assembling the die is increased. After the die is installed or maintained, the lower die base 08 is reversely slid to the working area.
Referring to fig. 18, a blocking rod 10 is further hinged on the workshop floor, and a fastening bolt 101 is arranged at one end of the blocking rod 10 away from the hinged position. After the lower die holder 08 is slid to the working area, the stop lever 10 is rotated to be attached to the side surface of the lower die holder 08, and the lower die holder 08 can be firmly fixed by screwing the abutting bolt 101. A protrusion (not shown in the figure) is arranged on the ground and on one side of the lower die base 08 away from the blocking rod 10, so as to be used for fixing the lower die base 08 by matching with the blocking rod 10 and the abutting bolt 101 and preventing the lower die base 08 from sliding towards the direction away from the blocking rod 10.
Referring to fig. 18, the lower die base 08 is further provided with a jacking table 11 at both ends thereof and below the robot arm 064. A jacking plate 111 is arranged above the jacking table 11, and jacking hydraulic cylinders 112 are arranged at four corners of the top surface of the jacking table 11. The jacking hydraulic cylinders 112 work synchronously, and the movable ends are connected to the bottom surface of the jacking plate 111. The top surface of the lift plate 111 is provided with a truncated cone-shaped engaging portion 1111, and the bottom surface of the robot arm 064 is provided with an engaging groove 641 into which the engaging portion 1111 is engaged. A buffer layer 1112 made of rubber is further provided on the top surface of the lifting plate 111. When the lower die holder 08 slides out of the working area, the jacking plate 111 is jacked by the jacking hydraulic cylinder 112 until the jacking plate 111 is supported below the mechanical arm 064 and the clamping and embedding part 1111 is clamped into the clamping and embedding groove 641, so that the mechanical arm 064 is stably placed on the top of the jacking plate 111. Then, the connection between the sliding arm 063 and the robot arm 064 is disconnected, and the lift-up plate 111 is continuously lifted up by the lift-up cylinder 112 until the robot arm 064 is higher than the lower die base 08. At this time, the lower die holder 08 can be slid out of the working area along the slide rail 09, and the mechanical arm 064 does not hinder the sliding of the lower die holder 08. The arrangement of the buffer layer 1112 made of rubber increases the placing stability of the mechanical arm 064 on the top surface of the jacking plate 111 on the one hand, and reduces damage and scratch to the mechanical arm 064 on the other hand.
The work is far away:
as shown in fig. 19, the material roll fixing device for fixing the material roll 13 on the rotating table 02 slowly unwinds in cooperation with the material roll tightening device and the material roll pressing device, and the unwound strip is reshaped by the strip reshaping unit and then enters the stamping unit to be stamped and processed into a stamped part. When one roll 13 is used for punching, another roll 13 may be mounted and fixed on a roll 13 fixing device on the other side of the rotating table 02 as a preparation. When the material roll 13 needs to be replaced, the material roll 13 is quickly replaced through rotation of the rotating platform 02, so that the prepared material roll 13 is moved to a processing station, and the efficiency of replacing the material roll 13 in the stamping process is greatly improved.
The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can modify the embodiments without inventive contribution as required after reading this specification, but only fall within the scope of the claims of the present invention.

Claims (6)

1. The utility model provides a gearbox oil blanket processing is with large-scale stamping processing system, includes the belting uncoiling unit, the orthopedic unit of belting and stamping forming unit that set gradually according to belting traffic direction, its characterized in that: the web unwinding unit includes a first unwinding unit for unwinding a web,
the top surface of the base (01) is provided with a sinking groove (011);
the rotating platform (02) is arranged above the base (01), the bottom of the rotating platform (02) is provided with a rotating shaft (021) inserted into the sinking groove (011), and the sinking groove (011) is internally provided with a driving assembly for driving the rotating shaft (021) to rotate in the circumferential direction; the driving assembly comprises a lever (012), a ratchet wheel (211), a pawl (014) and a driving piece (013) for generating push-pull power; the ratchet wheel (211) is coaxially sleeved on the rotating shaft (021) and is fixedly connected with the rotating shaft (021); the lever (012) is movably sleeved on the rotating shaft (021) and is positioned below the ratchet wheel (211); one end of the pawl (014) is hinged to the top surface of the lever (012) and the other end is clamped in a tooth groove on the ratchet wheel (211); the driving piece (013) is arranged on the bottom wall of the sinking groove (011) and is hinged with one end, far away from the rotating shaft (021), of the lever (012);
the material roll fixing devices are distributed on two opposite side surfaces of the rotating platform (02) in a central symmetry manner around the rotating shaft (021);
the material guide frame (03) is arranged on the ground on one side of the base (01) in a sliding manner, and a plurality of material guide rollers (311) are arranged on the material guide frame (03);
the material roll abutting device is arranged on the material guide frame (03) and used for applying axial pressure to the end face, away from the rotating table (02), of the material roll during unwinding;
and a material roll pressing device which is arranged at the top of the material guide frame (03) and is used for applying radial pressure to the material roll when the material roll is unwound;
two groups of driving pieces (013) and two groups of pawls (014) are arranged and are distributed around the rotating shaft (021) in a centrosymmetric manner; the driving piece (013) is an air cylinder or a hydraulic cylinder;
a first rectangular frame (034) is arranged at the bottom of the material guide frame (03), a first screw (341) is arranged on the first rectangular frame (034) along the length direction, and a first servo motor (342) is connected to the end of the first screw (341); the bottom of the material guide frame (03) is provided with a first lug (035), and the first screw (341) penetrates through the first lug (035); after the first servo motor (342) is electrified, the first screw rod (341) rotates, and the guide frame (03) slides along the length direction of the first rectangular frame (034) through the matching of the first screw rod (341) and the first bump (035);
the material roll abutting device comprises a setting frame (032) arranged on the material guide frame (03) and an abutting roller (324) used for abutting against the end face of the material roll, and the length direction of the setting frame (032) is perpendicular to the length direction of the abutting roller (324); a sliding block (323) is arranged on the setting frame (032) in a sliding manner along the length direction, and a threaded rod (321) and a guide rod (322) are arranged on the sliding block (323) in a penetrating manner; the length directions of the threaded rod (321) and the guide rod (322) are consistent with the length direction of the setting frame (032), and one end of the threaded rod (321) is connected with a second motor (3211); one end of the pressing roller (324) is fixed on the sliding block (323), and the other end faces the material roll fixing device;
the material roll lifting device is used for jacking the material roll to the height of the material roll fixing device during feeding, and is arranged on the ground on one side, away from the material guide frame (03), of the rotating table (02) in a sliding manner; the material roll lifting device comprises a base (04) which is arranged in a sliding mode, a material lifting platform (041) used for bearing the material roll and a jacking mechanism (042) arranged on the base (04), wherein a V-shaped groove (043) for placing the material roll is formed in the top surface of the material lifting platform (041), and the bottom surface of the material lifting platform is connected with the jacking mechanism (042).
2. The large stamping system for processing the oil seal of the gearbox as claimed in claim 1, wherein: the material roll fixing device comprises a sleeve (022) penetrating through the rotating platform (02), the sleeve (022) is rotatably connected with the rotating platform (02), and a first driving mechanism for driving the sleeve (022) to rotate in the circumferential direction is arranged; a plurality of arc-shaped plates (023) are coaxially arranged at one end of the sleeve (022), and the arc-shaped plates (023) are distributed around the sleeve (022); a plurality of movable rings (024) are sleeved on the sleeve (022), trapezoidal sliding blocks (241) are arranged on the periphery of the movable rings (024), and a connecting block (231) is arranged on the inner side of the arc-shaped plate (023); the connecting block (231) is provided with a sliding groove (232) for the trapezoidal sliding block (241) to be clamped in, and the sliding groove (232) is axially arranged along the sleeve (022) and gradually becomes shallow towards the direction close to the rotating table (02); be provided with on sleeve pipe (022) and be used for driving about activity ring (024) along sleeve pipe (022) axial reciprocating motion's second actuating mechanism, still be provided with between sleeve pipe (022) and arc (023) and be used for restricting arc (023) along sleeve pipe (022) axial motion's stop gear.
3. The large stamping system for processing the oil seal of the gearbox as claimed in claim 2, wherein: the first driving part comprises a first motor (028) arranged at the top of the rotating table (02), a first gear (281) arranged at the driving end of the first motor (028) and a second gear (221) sleeved on the sleeve (022), and the first gear (281) and the second gear (221) are in chain transmission.
4. The large stamping system for processing the oil seal of the gearbox as claimed in claim 2, wherein: the second driving mechanism comprises a movable rod (025) coaxially arranged in a sleeve (022), one end of the movable rod (025) is connected with an end plate (026), the other end of the movable rod is connected with a power part (251) used for generating push-pull power to drive the movable rod (025) to move back and forth along the axial direction of the movable rod, and the power part (251) is arranged at one end, far away from the arc-shaped plate (023), of the movable rod (025); the end plate (026) and each movable ring (024) are connected through a connecting rod (261).
5. The large stamping system for processing the oil seal of the gearbox as claimed in claim 1, wherein: the material roll pressing device further comprises a supporting arm (033) which is hinged to the material guide frame (03), a pressing wheel (331) which is rotatably arranged at one end, far away from the material guide frame (03), of the supporting arm (033), and a third driving part for driving the supporting arm (033) to rotate around a hinge point; the pressing wheel (331) is provided with a power source for driving the pressing wheel (331) to rotate.
6. The large stamping system for processing the oil seal of the gearbox as claimed in claim 1, wherein: one side edge of the material lifting platform (041) is provided with two material blocking rods (044) in a group along the vertical direction, the material blocking rods (044) are arranged on one side of the length direction of the V-shaped groove (043), and the distance between the two material blocking rods (044) is larger than the axial width of a material coil.
CN201910319529.2A 2019-04-19 2019-04-19 Large stamping system for machining gearbox oil seal Active CN109954762B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07251219A (en) * 1994-03-15 1995-10-03 Aida Eng Ltd Device for feeding coil material for press working
CN202045197U (en) * 2011-03-10 2011-11-23 广州粤研液压机电有限公司 Transposable two-arm active uncoiler
CN204866896U (en) * 2015-08-25 2015-12-16 东莞市世翔精密机械制造有限公司 Large -scale decoiler
CN204892776U (en) * 2015-08-25 2015-12-23 东莞市世翔精密机械制造有限公司 Trinity feeder of thick plate type
CN109530478A (en) * 2018-11-26 2019-03-29 安徽工程大学 A kind of flexibility steel band uncoiling method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07251219A (en) * 1994-03-15 1995-10-03 Aida Eng Ltd Device for feeding coil material for press working
CN202045197U (en) * 2011-03-10 2011-11-23 广州粤研液压机电有限公司 Transposable two-arm active uncoiler
CN204866896U (en) * 2015-08-25 2015-12-16 东莞市世翔精密机械制造有限公司 Large -scale decoiler
CN204892776U (en) * 2015-08-25 2015-12-23 东莞市世翔精密机械制造有限公司 Trinity feeder of thick plate type
CN109530478A (en) * 2018-11-26 2019-03-29 安徽工程大学 A kind of flexibility steel band uncoiling method

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