CN109291344B - Full-automatic sealing washer trimmer - Google Patents
Full-automatic sealing washer trimmer Download PDFInfo
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- CN109291344B CN109291344B CN201811109723.XA CN201811109723A CN109291344B CN 109291344 B CN109291344 B CN 109291344B CN 201811109723 A CN201811109723 A CN 201811109723A CN 109291344 B CN109291344 B CN 109291344B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/02—Deburring or deflashing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
- B29L2031/265—Packings, Gaskets
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- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a full-automatic sealing ring edge trimmer, which comprises a clamping device, a die, a pressing wheel device, an edge trimming device and a waste collecting device, wherein the clamping device is arranged on the die; the clamping device comprises a feeding clamping jaw and a discharging clamping jaw, and the feeding clamping jaw clamps materials and puts the materials into the die; the blanking clamping jaw is used for clamping the materials finished by trimming in the die; the mould comprises a groove, the groove is used for placing materials, at least two air holes and at least two thimbles are arranged in the groove, the air holes blow out or adsorb the materials through positive pressure or negative pressure, and the thimbles are used for ejecting the repaired materials; the pinch roller device is used for fixing materials; the trimming device comprises two groups of trimming cutter combinations for repairing the inner and outer edges of the material; the waste collecting device is used for collecting waste generated in the trimming process, the unmanned operation is truly realized, and the labor cost is completely saved for machinery.
Description
Technical Field
The invention relates to the field of grinding and polishing equipment, in particular to a full-automatic sealing ring edge trimmer.
Background
In the production process of rubber products, in order to prevent rubber shortage, the rubber material filled in the die cavity is kept excessive to a certain extent, the die cavity is quickly filled with the rubber material at the die pressing and vulcanizing stage, the excessive rubber material overflows from the parting surface of the die or the joint of the excessive rubber material and the metal insert to form burrs, and once the burrs are formed, a complete product can be obtained only by trimming, so that the appearance of the product is neat and attractive.
Currently, manual trimming is mostly used, i.e. an operator holds a cutter to trim the flash gradually along the outer edge and/or the inner edge of the product. Particularly, for the relatively soft rubber member, it is difficult to perform a good fixation by a mechanical structure, thereby performing a rapid trimming. The manual trimming method is time-consuming, labor-consuming and low in efficiency, tooth marks and notches are easily left on the product body to cause scrapping, the quality is difficult to guarantee, and the consistency of the product is poor. Although the automatic trimming function is realized, the full-automatic sealing ring trimming machine still wastes labor cost to a certain extent by using manual feeding and manual discharging, so that the full-automatic sealing ring trimming machine is urgently needed in the market, the automatic trimming can be completed, the manual feeding and the manual discharging can be realized, the cost is saved, and the efficiency is improved.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a fully automatic edge trimmer for sealing ring.
In order to solve the technical problems, the specific technical scheme of the invention is as follows:
the invention provides a full-automatic sealing ring edge trimmer, which comprises a feeding device, a clamping device, a die, a pressing wheel device, an edge trimming device and a waste collecting device, wherein the clamping device is arranged on the feeding device;
furthermore, the feeding device comprises a vibration disc and a straight vibrator, the vibration disc is internally provided with a spiral structure, a discharge port of the vibration disc is connected with a feed port of the straight vibrator, and the vibration disc is used for ensuring that the step surface of the material is upward; infrared sensors are arranged on two sides of the straight vibration device and used for detecting whether the materials are in place or not;
further, the clamping device comprises a feeding clamping jaw and a discharging clamping jaw, and the feeding clamping jaw clamps materials and puts the materials into the die; the blanking clamping jaw is used for clamping the materials finished by trimming in the die;
further, the mold comprises a groove, a vacuum pump and a piston, the groove is used for placing materials, at least two air holes and at least two ejector pins are arranged in the groove, the air holes are communicated with the vacuum pump, and the ejector pins are connected with the piston; the air holes blow out or adsorb materials by positive pressure or negative pressure, and the ejector pins are used for ejecting the repaired materials;
further, the pinch roller device is used for pressing the sealing ring in a groove of the die;
further, the trimming device comprises two groups of trimming cutter combinations for repairing the inner and outer edges of the material;
further, the waste collecting device is used for collecting material waste generated in the trimming process.
Specifically, the clamping device further comprises a base, a controller, a rotating mechanism and a jacking cylinder, wherein the controller, the rotating mechanism and the jacking cylinder are arranged below the base, and the controller is used for receiving signals of the infrared sensor to control the clamping device to operate.
Specifically, the base sets up the guide rail, material loading clamping jaw and unloading clamping jaw structure are the same, and are the right angle setting and be in on the guide rail of base.
Specifically, the material loading clamping jaw comprises a mechanical arm, a clamping jaw and a servo cylinder, one end of the mechanical arm is fixed to a guide rail of the base, the other end of the mechanical arm is provided with the clamping jaw, and the servo cylinder is fixed to the clamping jaw and used for controlling operation of the clamping jaw.
Specifically, the bottom of the servo electric cylinder is provided with a movable guide rail, and the clamping jaw comprises three clamping arms and a tool clamp matched with each clamping arm; the clamp arm is arranged on the movable guide rail, a plurality of span adjusting holes used for fixing the tool clamp are formed in the clamp arm, and the position of the tool clamp can be adjusted according to different material sizes.
Further, a motor and an electromagnetic clutch are arranged below the die, the motor is connected with the die through the electromagnetic clutch, and the electromagnetic clutch is used for controlling the operation or stop of the die.
Furthermore, the pinch roller device comprises a ball pinch roller, a lifting cylinder and a horizontal guide rail, wherein the lifting cylinder controls the pinch roller device to move up and down, and the horizontal guide rail controls the pinch roller device to be adjusted horizontally; the ball pinch roller is a ball four-point pinch roller.
Further, the trimming cutter combination comprises a first adjusting motor, a second adjusting motor and a trimming cutter; the first adjusting motor is used for controlling the position of the trimming knife, and the second adjusting motor is used for controlling the angle of the trimming knife;
specifically, the first adjusting motor and the second adjusting motor are servo motors.
Further, the waste collecting device comprises a plurality of air blowing nozzles and rocker cylinders; the blowing nozzle is arranged on one side of the mold to form a blowing nozzle group, the waste material groove is formed in the other side of the mold, and the rocker cylinder is connected with the blowing nozzle.
Furthermore, the range of the vibration disc and the clamping jaw for clamping the materials is 30-110 mm in external diameter specification of the oil seal before trimming and 5-15 mm in height.
By adopting the technical scheme, the full-automatic sealing ring trimming machine has the following beneficial effects:
1. the full-automatic sealing ring edge trimmer provided by the invention realizes real unmanned operation from a vibration feeding system, a transfer system, a grabbing system, an automatic chuck clamp and automatic waste blowing and collecting, and completely saves labor cost for machinery;
2. according to the full-automatic sealing ring edge trimmer, the feeding clamping jaw and the discharging clamping jaw are arranged, so that full-automatic operation is realized in material clamping and material clamping after edge trimming, the labor cost is reduced, and the working efficiency is improved.
3. According to the full-automatic sealing ring edge trimmer, due to the fact that the pressing wheel device is added, materials can be stably fixed in the groove, the materials are prevented from loosening along with the rapid rotation of the die in the edge trimming process, and meanwhile, due to the arrangement of the air holes, the materials can be further fixed through negative pressure air; positive pressure gas is matched with the thimble for discharging to ensure that the materials are taken out stably after trimming;
4. according to the full-automatic sealing ring edge trimmer, the position and the angle of the edge trimming cutter are adjusted through the first adjusting motor and the second adjusting motor, and new adjustment is not needed for materials of the same type, so that the servo parameterization setting is adopted for the edge trimming cutter before trimming, and the tool setting time is greatly saved;
5. according to the full-automatic sealing ring edge trimmer, after each material edge trimming is finished, the rocker cylinder controls the air blowing nozzle to blow the generated material, and the waste is collected through the waste tank, so that the automatic blowing function avoids shutdown caused by accumulation of the waste in work.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a block diagram of a fully automatic seal ring trimmer according to the present invention;
FIG. 2 is a structural diagram of a feeding device of the full-automatic sealing ring edge trimmer according to the invention;
FIG. 3 is a schematic diagram of a clamping device of the full-automatic sealing ring edge trimmer according to the present invention;
FIG. 4 is a schematic view of a clamping jaw of the full-automatic sealing ring trimmer of the present invention;
FIG. 5 is a schematic view of a mold for the full automatic sealing ring trimmer of the present invention;
FIG. 6 is a structural diagram of a pinch roller device of the full-automatic sealing ring trimmer of the present invention;
FIG. 7 is a schematic view of the trimming blade assembly of the fully automatic seal ring trimmer of the present invention;
FIG. 8 is a schematic view of a blowing nozzle of the full-automatic sealing ring edge trimmer according to the present invention.
Reference numbers in the figures: 1-feeding device, 2-clamping device, 3-mould, 4-pinch roller device, 5-trimming device, 6-waste collecting device, 11-vibration disk, 12-vertical vibration device, 21-base, 22-feeding clamping jaw, 23-blanking clamping jaw, 24-controller, 25-rotating mechanism, 26-jacking cylinder, 31-groove, 32-vacuum pump, 33-piston, 34-motor, 35-electromagnetic clutch, 41-ball pressure roller, 42-lifting cylinder, 43-horizontal guide rail, 51-trimming cutter combination, 61-blowing nozzle, 62-rocker cylinder, 63-waste tank, 121-infrared sensor, 211-guide rail, 221-mechanical arm, 222-clamping jaw, 223-servo cylinder, 311-air hole, 312-thimble, 511-first regulating motor, 512-second regulating motor, 513-trimming knife.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Example 1
As shown in fig. 1, the invention discloses a full-automatic sealing ring edge trimmer, which comprises a feeding device 1, a clamping device 2, a mold 3, a pressing wheel device 4, an edge trimming device 5 and a waste collecting device 6; the feeding device 1 comprises a vibration disc 11 and a straight vibrator 12, as shown in fig. 2, the interior of the vibration disc 11 is of a spiral structure, a discharge hole of the vibration disc 11 is connected with a feed hole of the straight vibrator 12, and the vibration disc 11 is used for ensuring that the step surface of a material is upward; the infrared sensors 121 are arranged on two sides of the straight vibration device 12 and used for detecting whether the materials are in place or not; the clamping device 2 comprises a feeding clamping jaw 22 and a discharging clamping jaw 23, and the feeding clamping jaw 22 clamps materials and puts the materials into the die 3; the blanking clamping jaw 23 is used for clamping the materials finished by trimming in the die 3.
As shown in fig. 5, the mold 3 includes a groove 31, a vacuum pump 32 and a piston 33, the groove 31 is used for placing materials, at least two air holes 311 and at least two ejector pins 312 are arranged inside the groove, the air holes 311 are communicated with the vacuum pump 32, and the ejector pins 312 are connected with the piston 33; the air hole 311 blows out or adsorbs materials by positive pressure or negative pressure, and the thimble 312 is used for ejecting the repaired materials; the pinch roller device 4 is used for pressing the sealing ring in the groove of the die 3; the trimming device 5 comprises two groups of trimming cutter assemblies 51 for repairing the inner and outer edges of the material; the waste collecting device 6 is used for collecting material waste generated in the trimming process.
Meanwhile, the clamping device 2 further comprises a base 21, a controller 24, a rotating mechanism 25 and a jacking cylinder 26, wherein the controller 24, the rotating mechanism 25 and the jacking cylinder 26 are arranged below the base 21, and the controller 24 is used for receiving signals of the infrared sensor 121 to control the operation of the clamping device 2. The base 21 is provided with a guide rail 211, and the feeding clamping jaw 22 and the blanking clamping jaw 23 have the same structure and are arranged on the guide rail 211 of the base 21 at a right angle.
As shown in fig. 3 and 4, the feeding gripper 22 includes a robot 221, a gripper 222, and a servo cylinder 223, one end of the robot 221 is fixed on the guide rail 211 of the base 21, the other end of the robot 221 is provided with the gripper 222, and the servo cylinder 223 is fixed on the gripper 222 for controlling the operation of the gripper 222. A moving guide rail is arranged at the bottom of the servo electric cylinder 223, and the clamping jaw 222 comprises three clamping arms and a tool clamp matched with each clamping arm; the clamp arm is arranged on the movable guide rail, and a plurality of span adjusting holes used for fixing the tool clamp are formed in the clamp arm.
The motor 34 and the electromagnetic clutch 35 are arranged below the mold 3, the motor 34 is connected with the mold 3 through the electromagnetic clutch 35, and the electromagnetic clutch 35 is used for controlling the operation or stop of the mold 3.
As shown in fig. 6, the pinch roller device 4 includes a ball pinch roller 41, a lifting cylinder 42 and a horizontal guide rail 43, the lifting cylinder 42 controls the pinch roller device 4 to move up and down, and the horizontal guide rail 43 controls the pinch roller device 4 to adjust horizontally; the ball pressure wheel 41 is a ball four-point pressure wheel.
As shown in fig. 7, the deburring cutter assembly 51 includes a first adjustment motor 511, a second adjustment motor 512, and a deburring cutter 513; the first adjusting motor 511 is used for controlling the position of the trimming blade 513, and the second adjusting motor 512 is used for controlling the angle of the trimming blade 513; the first adjustment motor 511 and the second adjustment motor 512 are servo motors.
The waste collecting device 6 comprises a plurality of air blowing nozzles 61 and rocker cylinders 62; as shown in fig. 8, the blowing nozzle 61 is arranged at one side of the mold 3 to form a blowing nozzle group, the waste chute 63 is arranged at the other side of the mold 3, and the rocker cylinder 62 is connected with the blowing nozzle 61.
Through the full-automatic sealing ring trimmer described above, the operation flow of the full-automatic sealing ring trimmer is as follows: the working personnel sends out an operation instruction, the vibration disc 11 starts vibration work, the sealing ring material enters the straight vibration device 12 with the step surface facing upwards, the infrared sensor 121 determines that the material enters a designated position, the controller 24 receives a signal of the sensor, controls the clamping device 2 to operate, the feeding clamping claw 22 clamps the material, the material is jacked and rotated by 90 degrees, the material is controlled to enter the groove 31 in the mold 3, then the feeding clamping claw 22 retracts, the material is rotated by 90 degrees anticlockwise to return to an initial state, after the material is placed in the groove 31, the vacuum pump 32 operates to generate negative pressure to adsorb the material through the air hole, the pressing wheel device 4 is matched to enable the material to be stably fixed in the groove 31, the motor 34 is always in an operating state in the whole operation process, the electromagnetic clutch 35 controls the operation and the stop of the mold, and in the process of placing the material, the electromagnetic clutch 35 controls the mold, after the materials are fixed, trimming is started, the electromagnetic clutch 35 starts to control the operation of a mold, the four servo motors control the positions and the angles of the two cutters, one cutter cuts the inner ring burrs of the sealing ring, and the other cutter cuts the outer ring burrs of the sealing ring; after trimming is completed, the two groups of cutters return, the electromagnetic clutch 35 controls the mold 3 to stop rotating, the vacuum pump 32 stops operating and positive pressure is applied, the bottom edge of the air blowing sealing ring is matched with the thimble 312 to position materials, the blanking clamping jaw 23 extends forwards to clamp the materials, the materials are placed into the material receiving device after clockwise rotation by 90 degrees, and finally, the materials are reset anticlockwise, so that one working cycle is completed.
The full-automatic sealing ring edge trimmer provided by the invention has the following beneficial effects: the full-automatic sealing ring edge trimmer provided by the invention realizes real unmanned operation from a vibration feeding system, a transfer system, a grabbing system, an automatic chuck clamp and automatic waste blowing and collecting, and completely saves labor cost for machinery;
according to the full-automatic sealing ring edge trimmer, the feeding clamping jaw and the discharging clamping jaw are arranged, so that full-automatic operation is realized in material clamping and material clamping after edge trimming, the labor cost is reduced, and the working efficiency is improved.
According to the full-automatic sealing ring edge trimmer, due to the fact that the pressing wheel device is added, materials can be stably fixed in the groove, the materials are prevented from loosening along with the rapid rotation of the die in the edge trimming process, and meanwhile, due to the arrangement of the air holes, the materials can be further fixed through negative pressure air; positive pressure gas is matched with the thimble for discharging to ensure that the materials are taken out stably after trimming;
according to the full-automatic sealing ring edge trimmer, the position and the angle of the edge trimming cutter are adjusted through the first adjusting motor and the second adjusting motor, and new adjustment is not needed for materials of the same type, so that the servo parameterization setting is adopted for the edge trimming cutter before trimming, and the tool setting time is greatly saved;
according to the full-automatic sealing ring edge trimmer, after each material edge trimming is finished, the rocker cylinder controls the air blowing nozzle to blow the generated material, and the waste is collected through the waste tank, so that the automatic blowing function avoids shutdown caused by accumulation of the waste in work.
Example 2
The invention relates to a full-automatic trimming and vibrating disc for a sealing ring, which has wide material application range due to the special design of a clamping jaw, and the size range of a sealing ring which can be trimmed is also large, so that the trimming of other oil seal sealing elements, such as the trimming of a framework oil seal, can be tried, the trimming can be realized by adjusting the vibrating disc, the clamping jaw and a mold according to the size of a target material, meanwhile, the trimming of a plastic canned bottle cap made of a softer material can also be finished, the design of the clamping jaw can change the clamping size and the clamping force, the clamping of the softer material can be better realized, and the trimming of the canned bottle cap made of the softer plastic material can also be realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. The utility model provides a full-automatic sealing washer trimmer which characterized in that includes:
the clamping device (2) comprises a feeding clamping jaw (22) and a discharging clamping jaw (23), and the feeding clamping jaw (22) is used for clamping materials and putting the materials into the die (3); the blanking clamping jaw (23) is used for clamping the materials finished by trimming in the die (3);
the mould (3) comprises a groove (31), a vacuum pump (32) and a piston (33), wherein the groove (31) is used for placing materials, the bottom of the groove is provided with at least two air holes (311) and at least two ejector pins (312), the air holes (311) are communicated with the vacuum pump (32), and the ejector pins (312) are connected with the piston (33); the air hole (311) is used for adsorbing materials by introducing negative pressure, and the ejector pin (312) is used for ejecting the repaired materials;
the pressing wheel device (4) is used for fixing materials in a groove of the die (3), the pressing wheel device (4) comprises a ball pressing wheel (41), a lifting cylinder (42) and a horizontal guide rail (43), the lifting cylinder (42) controls the pressing wheel device (4) to move up and down, and the horizontal guide rail (43) controls the pressing wheel device (4) to be adjusted horizontally;
the trimming device (5) comprises two groups of trimming cutter combinations (51) for repairing the inner edge and the outer edge of a material, wherein the trimming cutter combinations (51) comprise a first adjusting motor (511), a second adjusting motor (512) and a trimming cutter (513); the first adjusting motor (511) is used for controlling the position of the trimming blade (513), and the second adjusting motor (512) is used for controlling the angle of the trimming blade (513);
the waste collecting device (6) is used for collecting material waste generated in the trimming process; the waste collecting device (6) comprises a plurality of air blowing nozzles (61) and rocker cylinders (62); the blowing nozzle (61) is arranged on one side of the die (3) to form a blowing nozzle group, the waste trough (63) is arranged on the other side of the die (3), and the rocker cylinder (62) is connected with the blowing nozzle (61); the clamping device (2) further comprises a base (21), a controller (24), a rotating mechanism (25) and a jacking cylinder (26), wherein the controller (24), the rotating mechanism (25) and the jacking cylinder (26) are arranged below the base (21), and the controller (24) is used for receiving signals of an infrared sensor (121) to control the operation of the clamping device (2);
the base (21) is provided with a guide rail (211), the feeding clamping jaw (22) and the blanking clamping jaw (23) have the same structure, and are arranged on the guide rail (211) of the base (21) in a right angle;
the feeding clamping jaw (22) comprises a mechanical arm (221), a clamping jaw (222) and a servo cylinder (223), one end of the mechanical arm (221) is fixed on a guide rail (211) of the base (21), the other end of the mechanical arm (221) is provided with the clamping jaw (222), and the servo cylinder (223) is fixed on the clamping jaw (222) and used for controlling the operation of the clamping jaw (222);
the bottom of the servo cylinder (223) is provided with a movable guide rail, and the clamping jaw (222) comprises three clamping arms and a tool clamp matched with each clamping arm; the clamp arm is arranged on the movable guide rail, and a plurality of span adjusting holes used for fixing the tool clamp are formed in the clamp arm.
2. The full automatic sealing ring edger according to claim 1, further comprising a feeding device (1), wherein the feeding device (1) comprises a vibration disc (11) and a straight vibrator (12), the vibration disc (11) is used for ensuring that the step surface of the material faces upwards; and infrared sensors (121) are arranged on two sides of the vertical vibration device (12) and are used for detecting whether the materials are in place.
3. The full-automatic sealing ring edge trimmer according to claim 1, characterized in that a motor (34) and an electromagnetic clutch (35) are arranged below the die (3), the motor (34) is connected with the die (3) through the electromagnetic clutch (35), and the electromagnetic clutch (35) is used for controlling the operation or stop of the die (3).
4. The full automatic seal ring trimmer according to claim 1, characterized in that the ball pressure wheel (41) is a ball four-point pressure wheel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811109723.XA CN109291344B (en) | 2018-09-21 | 2018-09-21 | Full-automatic sealing washer trimmer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811109723.XA CN109291344B (en) | 2018-09-21 | 2018-09-21 | Full-automatic sealing washer trimmer |
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| CN109291344A CN109291344A (en) | 2019-02-01 |
| CN109291344B true CN109291344B (en) | 2021-03-19 |
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| CN110978349B (en) * | 2019-11-21 | 2021-08-20 | 南通大学 | Automatic trimmer of many specifications O type sealing washer |
| CN111206408B (en) * | 2019-12-24 | 2021-09-07 | 中国航空工业集团公司北京航空精密机械研究所 | Automatic preparation device and method for composite material honeycomb silencing cap blank |
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