CN117583879B - Screw tightening machine for producing electronic clock - Google Patents
Screw tightening machine for producing electronic clock Download PDFInfo
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- CN117583879B CN117583879B CN202410070952.4A CN202410070952A CN117583879B CN 117583879 B CN117583879 B CN 117583879B CN 202410070952 A CN202410070952 A CN 202410070952A CN 117583879 B CN117583879 B CN 117583879B
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- 230000007246 mechanism Effects 0.000 claims abstract description 80
- 238000000034 method Methods 0.000 claims abstract description 50
- 230000008569 process Effects 0.000 claims abstract description 38
- 239000012530 fluid Substances 0.000 claims description 52
- 239000000919 ceramic Substances 0.000 claims description 32
- 230000005684 electric field Effects 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 32
- 238000007664 blowing Methods 0.000 claims description 19
- 239000007787 solid Substances 0.000 claims description 9
- 239000000178 monomer Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 3
- 230000000877 morphologic effect Effects 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 20
- 238000013461 design Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/001—Article feeders for assembling machines
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Abstract
The invention discloses a screw tightening machine for producing an electronic clock, which comprises a stepping rotating seat body, a screw primary screwing mechanism, a screw secondary screwing mechanism and a screw feeding mechanism, wherein the stepping rotating seat body is vertically arranged and can rotate in a stepping manner in the vertical direction; the screw feeding mechanism transmits screws to the screw primary screwing mechanism; the stepping rotating seat body rotates to drive the screw primary screwing mechanism to move to a screw hole site, and the screw primary screwing mechanism screws the screw primary into the screw hole; through fine mechanical design and intelligent control system, realized high efficiency, high accuracy and the high reliability of screw fastening process. The screw tightening machine is particularly suitable for manufacturing precise equipment such as electronic clocks and the like in production environments with high requirements on precision and strict requirements on efficiency. The screw tightening machine can remarkably improve production efficiency, reduce rejection rate, reduce labor cost and improve quality of final products.
Description
Technical Field
The invention belongs to the technical field of mechanical automation, and particularly relates to a screw tightening machine for producing an electronic clock.
Background
Screw tightening is an important but cumbersome step in the assembly of electronic products. Currently, electronic products, particularly precision equipment such as electronic clocks, require precise and reliable screw tightening techniques to ensure the stability of the assembly and the long-term stability of the equipment.
Conventional screw tightening methods rely on manual operations, which are not only inefficient, but also present significant challenges in terms of accuracy and consistency. In the production of electronic clocks with high precision requirements, any minor errors in the tightening of screws can lead to product quality problems. Therefore, the development of the high-precision and high-efficiency automatic screw fastening mechanical equipment has important significance for improving the production efficiency and the product quality of the electronic clock.
While the existing automated screw tightening devices have improved certain production efficiencies, there are still many limitations in the screw supply, positioning, tightening and re-tightening processes. For example, the automatic supply and positioning of the screws is not sufficiently precise, resulting in an unsatisfactory fastening effect or even in the event of damage or the like.
Disclosure of Invention
The invention aims at: a screw tightening machine for producing electronic clock, which realizes high efficiency, high precision and high reliability of screw tightening process through fine mechanical design and intelligent control system. The method is particularly suitable for manufacturing precise equipment such as electronic clocks and the like in production environments with high requirements on precision and strict requirements on efficiency. By the method, the production efficiency can be obviously improved, the rejection rate can be reduced, the labor cost can be reduced, and the quality of the final product can be improved.
The technical scheme adopted by the invention is as follows:
a screw tightening machine for producing an electronic clock comprises a stepping rotating seat body which is vertically arranged and can rotate in a stepping way in the vertical direction, a screw primary screwing mechanism and a screw secondary screwing mechanism which are alternately arranged on the stepping rotating seat body along the circumference of the stepping rotating seat body, and a screw feeding mechanism which is arranged above the stepping rotating seat body; the screw feeding mechanism transmits screws to the screw primary screwing mechanism; the stepping rotating seat body rotates to drive the screw primary screwing mechanism to move to a screw hole site, and the screw primary screwing mechanism screws the screw primary into the screw hole; the stepping rotating seat body rotates again to drive the screw primary screwing mechanism to leave the screw, and drives the screw secondary screwing mechanism to move to the screw position which is primarily screwed on the screw hole site, so that the screw is completely screwed on the screw hole site.
The screw primary screwing mechanism comprises a first servo motor, a first sliding key telescopic rod, a first externally threaded cylinder and a first internally threaded sleeve which is sleeved outside the first externally threaded cylinder and is in threaded fit with the first externally threaded cylinder; the first sleeve with the internal threads is fixedly connected with the stepping rotating seat body through a plurality of first connecting rods; the front end of the first cylinder with the external threads is fixed with a screw cavity; the front end of the screw cavity is open, and an openable petal-shaped structure is arranged at the open position; the petal-shaped structure is provided with a liquid suction pipe; a liquid adding pipe is arranged on the screw cavity; a boss with a counter bore is arranged in the middle of the bottom of the screw cavity; the counter bore of the counter bore boss comprises a straight line part positioned at the lower part and a horn-shaped part positioned at the upper part; the diameter of the straight line part is slightly larger than that of the head part of the screw; an electromagnet is fixedly arranged at the bottom of the linear part; a plurality of electrode pairs are oppositely arranged on the inner side surface of the screw cavity; the screw cavity is filled with electrorheological fluid through a liquid adding pipe or is pumped out of electrorheological fluid through a liquid pumping pipe according to the requirement;
each petal of the petal-shaped structure comprises a piezoelectric deformation piece and an elastic rubber piece; one end of the piezoelectric deformation sheet is fixed at the front end of the screw cavity, and the other end of the piezoelectric deformation sheet is fixedly connected with one end of the elastic rubber sheet; the piezoelectric deformation sheets are controlled to bend towards the middle part of the front end of the screw cavity or reversely by current, so that each elastic rubber sheet is collected into a flower-shaped sealing screw cavity front end or is opened into a flower shape to expose an opening at the front end of the screw cavity;
the screw re-screwing mechanism comprises a second servo motor, a second telescopic rod with a sliding key, a second cylinder with external threads and a second sleeve with internal threads, wherein the second sleeve with internal threads is sleeved outside the second cylinder with external threads and is in threaded fit with the second cylinder with external threads; the second sleeve with internal threads is fixedly connected with the stepping rotating seat body through a plurality of second connecting rods; the front end of the second cylinder with external threads is fixed with a screwing head which can be matched with the notch of the head of the screw; the outer sliding sleeve of the screwing head is provided with a permanent magnet ring; the front end of the permanent magnet ring is provided with a groove for embedding the head of the screw.
The number of the screw primary screwing mechanism and the screw secondary screwing mechanism is two, and the included angle between the adjacent screw primary screwing mechanism and the adjacent screw secondary screwing mechanism is ninety degrees; the stepping rotating seat body rotates ninety degrees for a single time.
The piezoelectric deformation sheet comprises a piezoelectric ceramic sheet positioned in the middle and elastic resin sheets coated on two sides of the piezoelectric ceramic sheet; the piezoelectric ceramic plate can be controlled to bend and deform towards any surface by applying an electric field to the piezoelectric ceramic plate.
The thread spacing of the first externally threaded cylinder and the first internally threaded sleeve and the thread spacing of the second externally threaded cylinder and the second internally threaded sleeve are the same as the thread spacing of the screw, so that the linear feed amount of the first externally threaded cylinder and the second externally threaded cylinder rotating for one circle is the same as the linear feed amount of the screw rotating for one circle.
The first telescopic rod with the sliding key and the second telescopic rod with the sliding key are connected through a sliding key sliding groove matching structure arranged along the linear direction of the telescopic rod body, and torque force transmission is achieved under the condition that the telescopic rod is not affected.
The screw feeding mechanism comprises a screw conveying pipeline; the screw conveying pipeline comprises a vertical part; the vertical part is provided with a telescopic corrugated pipe structure to realize the expansion of the lower section part of the vertical part; an active telescopic rod is arranged between the upper section and the lower section of the vertical part of the telescopic corrugated pipe structure; the active telescopic rod drives the telescopic corrugated pipe structure to stretch; a plurality of groups of elastic baffle plates are arranged in the screw conveying pipeline at intervals; the distance between two adjacent groups of elastic baffle plates is the length of a screw; each group of elastic baffle plates comprises a plurality of elastic baffle plate monomers which are uniformly distributed around the central shaft of the screw conveying pipeline; the elastic baffle monomers incline towards the screw feeding direction respectively; a plurality of air blowing ports are uniformly arranged on the screw conveying pipeline between the two groups of elastic baffle plates around the circumference of the screw conveying pipeline; the air blowing port is used for obliquely blowing air in a pulse manner towards the screw feeding direction; smooth elastic bulges are arranged on the inner wall of the lower end of the vertical part so as to prevent the screw from naturally falling; a plurality of identical air blowing ports are also arranged above the elastic protrusions; the vertical part can be inserted into the screw cavity to be in butt joint with the boss with the counter bore; the inner diameter of the opening at the lower end of the vertical part is the same as that of the linear part; and a chamfer which can be matched with the horn-shaped part is arranged on the outer side of the lower end of the vertical part.
The screw fastening method of the screw fastening machine comprises the following steps:
(1) at the beginning, one of the screw initial screwing mechanisms is positioned at the highest position of the upper part of the stepping rotating seat body; the air blowing port in the screw conveying pipeline blows pulse pressurized air to the screw feeding direction, the air pushes the screw to push through the elastic baffle, and the elastic baffle supports and separates the screw without excessive inclination and accumulation; at this time, the screw in the vertical part falls to be blocked by the elastic bulge;
(2) the driving telescopic rod drives the telescopic corrugated pipe structure to extend, so that the lower end of the vertical part is driven to extend into the screw cavity and is inserted and matched with the boss with the counter bore; at the moment, the air blowing port above the elastic bulge blows air again, so that the screw is pushed to push through the elastic bulge to fall into the linear part, and at the moment, the system controls the electromagnet to be electrified so as to tightly suck the screw at the bottom of the linear part; the active telescopic rod drives the telescopic corrugated pipe structure to recover, so that the lower end of the vertical part is driven to extend out of the screw cavity; in the process, the system controls the direction of the electric field acting on the piezoelectric ceramic plates, so that each piezoelectric ceramic plate bends and expands towards two sides, and the vertical part can conveniently extend into and out of the screw cavity;
(3) charging electrorheological fluid into the screw cavity through the liquid charging pipe; the system control electrode pair is electrified to generate an electric field, and the electric field acts on the electrorheological fluid to enable the electrorheological fluid to be instantly converted into solid state, so that the fixing screw is tightly covered;
(4) the system controls the stepping rotating base to continuously rotate two ninety degrees to enable the screw primary screwing mechanism to face downwards, and at the moment, a screw hole position on the electronic clock, on which a screw needs to be screwed, is moved to a position opposite to the screw under the control of the workbench; the system controls the first servo motor to drive the first externally threaded cylinder to rotate through the first sliding key telescopic rod, and the first externally threaded cylinder is in threaded fit with the fixed first internally threaded sleeve, so that the first externally threaded cylinder synchronously advances in the rotating process, the screw is pushed to advance and rotate, the screw is in threaded fit with the threaded hole site, in the process, the electric field generated by the system control electrode pair is reduced, so that the electrorheological fluid is converted into a viscous state, and the screw is not blocked from precession while the morphological structure is maintained;
(5) after the screw is screwed into a certain distance, the screw posture is stable, the system controls the electric field direction of the piezoelectric ceramic plates to be reversed, so that each piezoelectric ceramic plate is bent towards the middle part of the screw cavity, and each elastic rubber plate deflects towards one side of the middle part of the screw cavity to enclose a flower-shaped closed screw cavity front end opening; then the system control electrode pair is powered off, electrorheological fluid losing the effect of an electric field is converted into liquid, and is rapidly extracted through the liquid extracting pipe communicated with the elastic rubber sheet, and the electrorheological fluid can be completely extracted and cannot leak because the liquid extracting pipe is located at the lowest position and the rapid extraction action can generate larger negative pressure; after the electrorheological fluid is rapidly pumped out, the system controls the electric field direction of the piezoelectric ceramic plates to be reversed again, so that each piezoelectric ceramic plate is bent outwards again, and each elastic rubber plate is deflected outwards again to be opened so as to expose the front end opening of the screw cavity; then the system controls the electromagnet to be powered off, so that the electromagnet loses magnetism; simultaneously controlling the first servo motor to rotate reversely, and retreating the screw cavity under the matching of the threads of the first externally threaded cylinder and the first internally threaded sleeve to separate the screw from the screw cavity;
(6) the system controls the stepping rotating seat body to rotate ninety degrees again, so that the screwing head of the screw screwing mechanism is opposite to the screw; the system controls the second servo motor to drive the second external thread cylinder to rotate through the second telescopic rod with the sliding key, and as the second external thread cylinder is in threaded fit with the second internal thread sleeve and the thread spacing is the same as that of the screw, the screw head is fed in the rotating process, and finally the screw is inserted into the screw hole site in a matched and rotated mode with the notch of the head of the screw, and in the process, because the rotation and the feeding of the screw head are completely synchronous with the rotation and the feeding of the screw and the screw hole site, the screw head is driven by the pushing force to the screw in the screwing process, and the pushing force can not damage the threads of the screw and the screw hole site;
(7) the steps (1) to (6) are repeated, but from the step (6), the system controls the stepping rotating base to rotate ninety degrees each time, so that the screw initial screwing mechanism and the screw re-screwing mechanism are alternately performed, and the lower workbench continuously adjusts the screw hole position of the electronic clock, which is required to be screwed, to move to a designated position according to the preset parameters of the system.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. production efficiency and precision are improved: through automatic stepping rotation pedestal and accurate screw primary screwing and re-screwing mechanism, this scheme has shown speed and the precision of screw fastening to have been improved. Compared with the traditional manual operation, the automatic device can complete screw fastening more quickly and consistently, and reduces production time and labor cost.
Optimizing screw supply and positioning: the screw feeding mechanism can effectively transmit screws to the fastening position, and errors and time delay which may occur when the screws are manually supplied are reduced. In addition, the automatic positioning of the screw ensures that the screw is accurately inserted into the screw hole, and the assembly quality is further improved.
Automation control and adjustability: the whole screw tightening process is controlled by a computer, so that the consistency and the repeatability of the operation are ensured. Meanwhile, each part of the mechanical equipment can be adjusted according to different production requirements, so that the applicability of the mechanical equipment on different production lines is improved.
Reduce human error and improve security: the automated fastening process reduces the risk of errors and accidents due to mishandling. In addition, automated operations reduce the need for workers to directly contact mechanical components, thereby improving workplace safety.
And the economic benefit is improved: although the initial investment may be high, in the long term, the scheme can bring remarkable economic benefit to enterprises by reducing labor cost and improving production efficiency.
2. In the invention, the application of electrorheological fluid to stabilize the screw posture is an innovative point, and particularly, the conversion between liquid state, solid state and viscous state brings multiple advantages to the screw fastening process.
Action of electrorheological fluid in screw gesture stabilization
Liquid to solid conversion: electrorheological fluids are liquid and readily flowable when no electric field is applied. When an electric field is applied, the electrorheological fluid is quickly converted into a solid state, and particles of the electrorheological fluid are arranged into a chain structure under the action of the electric field, so that the fluid becomes solidified. This feature is used to quickly set the screw during the screw tightening process, preventing it from moving or rotating during the tightening process.
Solid to viscous state transition: after the screw is initially positioned, the electrorheological fluid can be changed from a solid state to a viscous state by controlling the strength of the electric field. This semi-solid form helps to keep the screw position stable while allowing fine adjustment thereof, ensuring that the screw can be screwed into the screw hole accurately.
Transition from viscous to liquid state: after the screw is fastened, the electric field is removed, and the electrorheological fluid is restored to a liquid state, so that the screw is released. This is particularly important after the screw is fully tightened, since it not only allows the screw to be released smoothly from the mechanical grip, avoiding damage to the screw or product that may be caused by mechanical withdrawal; and simultaneously, the electrorheological fluid can be pumped away.
Matching advantage of electrorheological fluid and petal-shaped structure
Avoiding electrorheological fluid leakage after withdrawal of the electric field: the electrorheological fluid can be pumped away only by withdrawing the electric field to recover the electrorheological fluid to a liquid state, and the closed state of the petal-shaped structure can be used for sealing and blocking the electrorheological fluid, so that the electrorheological fluid can be completely pumped away, and the leakage of the electrorheological fluid can be avoided in the process of high negative pressure quick suction applied during pumping away, so that the sealing requirement on the petal-shaped structure is not required to be too high.
Precisely controlling screw release: when the petal-shaped structure is matched with electrorheological fluid for use, the release of the screw can be accurately controlled after the screw is fastened. When the screw is fastened, the electrorheological fluid returns to a liquid state, the petal-shaped structure can be easily opened, the screw is smoothly released, and the damage to the screw or the screw hole caused by mechanical clamping is avoided.
Protection screw and screw: in the screw fastening process, the petal-shaped structure and the electrorheological fluid act together, so that the stability of the screw is maintained, a buffer mechanism is provided, and the screw hole are protected from excessive force or impact possibly generated in the mechanical fastening process; simultaneously, the petal-shaped structure can assist in stabilizing the posture of the screw; ensuring the accurate matching of the screw and the screw hole site.
The production efficiency is improved: such a combination may increase the efficiency of the overall screw tightening process. The electrorheological fluid rapidly responds to the change of an electric field and is combined with the rapid opening and closing of the petal-shaped structure, so that the time required by fastening and releasing the screw is greatly reduced.
The equipment wear is reduced: electrorheological fluids provide a non-contact stable way of fixing the screw, meaning that mechanical components (e.g., rosette structures) do not require additional force to fix the screw, reducing mechanical wear and maintenance costs.
In summary, through the delicate matching of the electrorheological fluid and the petal-shaped structure, the screw tightening device not only improves the efficiency and the precision of screw tightening, but also improves the reliability of the screw tightening process, reduces the risks of mechanical abrasion and damage, and increases the stability and the economic benefit of the whole production line.
3. The screw fastening method of the invention can realize:
efficient screw conveying: through the combination of the air blowing port of the pulse pressurized air and the elastic baffle, the screw can be efficiently and accurately conveyed to the designated position, and the efficiency and the reliability of the whole system are improved.
Screw accumulation and entanglement are reduced: the design of the elastic baffle plate avoids excessive inclination and accumulation of screws in the conveying process, and ensures smooth flow and accurate sequencing of the screws.
Accurate screw positioning: by utilizing the active telescopic rod and the corrugated pipe structure, the screw is accurately fed into the screw cavity and matched with the counter bore boss, so that the correct positioning of the screw is ensured.
Enhanced screw fixation: the use of the electromagnet improves the stability of the screw in the screw cavity and avoids any movement or slipping in the fastening process.
Instant fixing screw: through the application of electrorheological fluid, the screw can be fixed in a very short time, the fastening efficiency is improved, and meanwhile, the position accuracy of the screw in the fastening process is ensured.
Accurate screw feed and rotation: the screw is through the servo motor of accurate control and the combination of taking the sliding key telescopic link to and the screw cylinder and the screw pitch of screw sleeve and the same characteristics of screw pitch, guaranteed the perfect adaptation of screw and screw to provide very right suitable pressure at the screwing in-process, improved fastening quality.
Stable screw attitude: the application of the piezoelectric ceramic sheet and the elastic rubber sheet keeps the stable posture of the screw in the fastening process, and the screw is smoothly released after the screw is completed; meanwhile, the electrorheological fluid can be ensured not to leak when returning to the liquid state and being pumped away.
Efficient re-threading operation: through the cooperation of the second servo motor and the sliding key telescopic rod, efficient re-screwing of the screw is achieved, and the screw is ensured to be completely and uniformly fastened.
Automated cyclic process: the automatic circulation process reduces manual intervention and improves the production efficiency and consistency.
In general, the screw tightening method achieves high efficiency, high accuracy and high reliability of the screw tightening process through a fine mechanical design and an intelligent control system. The method is particularly suitable for manufacturing precise equipment such as electronic clocks and the like in production environments with high requirements on precision and strict requirements on efficiency. By the method, the production efficiency can be obviously improved, the rejection rate can be reduced, the labor cost can be reduced, and the quality of the final product can be improved.
Drawings
FIG. 1 is a schematic view of a screw tightening machine according to the present invention;
FIG. 2 is a schematic structural view of a screw feeding mechanism according to the present invention;
FIG. 3 is an enlarged schematic view of the structure of circle A in FIG. 1;
FIG. 4 is a schematic structural view of a piezoelectric deformation sheet;
FIG. 5 is an enlarged schematic view of circle B in FIG. 1;
fig. 6 is an enlarged schematic view of circle C in fig. 1.
The marks in the figure: 1-step rotating the seat body; 2-a screw primary screwing mechanism; 21-a first servomotor; 22-a first sliding key telescopic rod; 23-a first externally threaded cylinder; 24-a first internally threaded sleeve; 25-screw cavity; 251-an electromagnet; 252-electrode pair; 253—electrorheological fluid; 254-counter bore boss; 255-straight line portion; 256-flare; 26-rosette structure; 261-piezoelectric deformation sheet; 262-elastic rubber sheet; 263-piezoelectric ceramic plate; 264-elastic resin sheets; 27-an extraction tube; 28-a liquid adding pipe; 29-a first link; 3-a screw re-screwing mechanism; 31-a second servo motor; 32-a second telescopic rod with a sliding key; 33-a second externally threaded cylinder; 34-a second internally threaded sleeve; 35-a second link; 36-screwing; 37-permanent magnet rings; 4-a screw feeding mechanism; 41-screw conveying pipeline; 411-elastic flaps; 413-an air-blowing port; 42-vertical; 421-elastic bump; 43-bellows structure; 44-active telescopic rod.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 6, a screw tightening machine for producing an electronic clock includes a step-rotation housing 1 vertically provided and rotatable in steps in a vertical direction, a screw preliminary screwing mechanism 2 and a screw re-screwing mechanism 3 alternately provided on the step-rotation housing 1 along a circumference of the step-rotation housing 1, and a screw feeding mechanism 4 provided above the step-rotation housing 1; the screw feeding mechanism 4 transmits screws to the screw primary screwing mechanism 2; the stepping rotating seat body 1 rotates to drive the screw primary screwing mechanism 2 to move to a screw hole position, and the screw primary screwing mechanism 2 screws a screw into the screw hole; the stepping rotating seat body 1 rotates again to drive the screw primary screwing mechanism 2 to leave the screw, and drives the screw secondary screwing mechanism 3 to move to the screw position which is primarily screwed on the screw hole site, so that the screw is completely screwed on the screw hole site.
The screw primary screwing mechanism 2 comprises a first servo motor 21, a first sliding key telescopic rod 22, a first externally threaded cylinder 23 and a first internally threaded sleeve 24 which is sleeved outside the first externally threaded cylinder 23 and is in threaded fit with the first externally threaded cylinder 23; the first internally threaded sleeve 24 is fixedly connected with the stepping rotating seat body 1 through a plurality of first connecting rods 29; the front end of the first externally threaded cylinder 23 is fixed with a screw cavity 25; the front end of the screw cavity 25 is open, and an openable petal-shaped structure 26 is arranged at the open position; the petal-shaped structure 26 is provided with a liquid suction pipe 27; the screw cavity 25 is provided with a liquid adding pipe 28; a boss 254 with a counter bore is arranged in the middle of the bottom in the screw cavity 25; the counterbore of the counterbore boss 254 includes a lower straight portion 255 and an upper flare 256; the diameter of the straight line part 255 is slightly larger than the diameter of the screw head; the bottom of the straight line part 255 is fixedly provided with an electromagnet 251; a plurality of electrode pairs 252 are oppositely arranged on the inner side surface of the screw cavity 25; the screw cavity 25 is filled with electrorheological fluid 253 through a liquid adding pipe 28 or is pumped out of electrorheological fluid 253 through a liquid pumping pipe 27 according to the requirement;
each flap of the flap-like structure 26 includes a piezoelectric deformation sheet 261 and an elastic rubber sheet 262, respectively; one end of the piezoelectric deformation sheet 261 is fixed at the front end of the screw cavity 25, and the other end is fixedly connected with one end of the elastic rubber sheet 262; the piezoelectric deformation sheets 261 are controlled to bend towards the middle part of the front end of the screw cavity 25 or reversely by current, so that each elastic rubber sheet 262 is folded into a flower-shaped shape to block the front end of the screw cavity 25 or is opened into a flower-shaped shape to expose the front opening of the screw cavity 25;
the screw re-screwing mechanism 3 comprises a second servo motor 31, a second telescopic rod 32 with a sliding key, a second cylinder 33 with external threads and a second sleeve 34 with internal threads, wherein the second sleeve 34 with internal threads is sleeved outside the second cylinder 33 with external threads and is in threaded fit with the second cylinder 33 with external threads; the second internally threaded sleeve 34 is fixedly connected with the stepping rotating seat body 1 through a plurality of second connecting rods 35; the front end of the second externally threaded cylinder 33 is fixed with a screwing head 36 which can be matched with the notch of the screw head; a permanent magnet ring 37 is sleeved outside the screwing head 36 in a sliding manner; the front end of the permanent magnet ring 37 is provided with a groove for embedding the head of the screw.
Further, the number of the screw primary screwing mechanism 2 and the screw re-screwing mechanism 3 is two, and the included angle between the adjacent screw primary screwing mechanism 2 and the adjacent screw re-screwing mechanism 3 is ninety degrees; the stepping rotating base 1 rotates ninety degrees once.
Further, the piezoelectric deformation sheet 261 includes a piezoelectric ceramic sheet 263 positioned in the middle and elastic resin sheets 264 coated on both sides of the piezoelectric ceramic sheet 263; the piezoelectric ceramic piece 263 can be controlled to bend and deform to any surface by applying an electric field to the piezoelectric ceramic piece 263.
Further, the thread pitch of the first externally threaded cylinder 23 and the first internally threaded sleeve 24 and the thread pitch of the second externally threaded cylinder 33 and the second internally threaded sleeve 34 are the same as the thread pitch of the screw, so that the linear feed amount of one rotation of the first externally threaded cylinder 23 and the second externally threaded cylinder 33 is the same as the linear feed amount of one rotation of the screw.
Further, the transmission of torsion is realized between the first telescopic rod 22 with sliding key and the second telescopic rod 32 with sliding key through the sliding key sliding groove matching structure arranged along the straight line direction.
Further, the screw feeding mechanism 4 comprises a screw conveying pipeline 41; the screw conveying pipe 41 includes a vertical portion 42; the vertical part 42 is provided with a telescopic corrugated pipe structure 43 for realizing the extension and retraction of the lower section part of the vertical part 42; an active telescopic rod 44 is arranged between the upper section and the lower section of the vertical part 42 of the telescopic corrugated pipe structure 43; the active telescopic rod 44 drives the telescopic corrugated pipe structure 43 to stretch and retract; a plurality of groups of elastic baffle plates 411 are arranged in the screw conveying pipeline 41 at intervals; the distance between two adjacent groups of elastic baffle plates 411 is the length of a screw; each group of elastic baffle 411 comprises a plurality of elastic baffle monomers which are uniformly distributed around the central axis of the screw conveying pipeline 41; the elastic baffle monomers incline towards the screw feeding direction respectively; a plurality of air blowing ports 413 are uniformly arranged on the screw conveying pipeline 41 between the two groups of elastic baffle plates 411 around the circumference thereof; the air blowing port 413 is inclined to blow air in the screw feeding direction; a smooth elastic protrusion 421 is arranged on the inner wall of the lower end of the vertical part 42 to prevent the screw from naturally falling; a plurality of identical air blowing ports 413 are also arranged above the elastic protrusions 421; the vertical part 42 can be inserted into the screw cavity 25 to be in butt joint with the boss 254 with the counter bore; the inner diameter of the opening at the lower end of the vertical part 42 is the same as that of the linear part 255; the lower outer side of the vertical part 42 is provided with a chamfer which can be matched with the horn-shaped part 256.
The screw tightening method of the screw tightening machine comprises the following steps:
(1) at the beginning, a further screw initial screwing mechanism 2 is positioned at the highest position of the upper part of the stepping rotating seat body 1; the air blowing port 413 in the screw conveying pipeline 41 blows pulse pressurized air to the screw feeding direction, the air pushes the screws to push the elastic baffle 411, and the elastic baffle 411 supports and separates the screws from excessive inclination and no accumulation; the screw in the vertical portion 42 at this time falls to be blocked by the elastic projection 421;
(2) the driving telescopic rod 44 drives the telescopic corrugated pipe structure 43 to extend, so that the lower end of the vertical part 42 is driven to extend into the screw cavity 25 and is inserted and matched with the boss 254 with the counter bore; at this time, the air blowing port 413 above the elastic protrusion 421 blows air again, so that the screw is pushed to push through the elastic protrusion 421 and fall into the linear part 255, and at this time, the system controls the electromagnet 251 to be electrified so as to tightly suck the screw at the bottom of the linear part 255; the active telescopic rod 44 drives the telescopic corrugated pipe structure 43 to recover, so that the lower end of the vertical part 42 is driven to extend outwards from the screw cavity 25; in the process, the system controls the direction of the electric field acting on the piezoelectric ceramic plates 263, so that each piezoelectric ceramic plate 263 bends and expands to two sides, and the vertical part 42 conveniently stretches into and stretches out of the screw cavity 25;
(3) charging electrorheological fluid 253 into the screw cavity 25 through a charging pipe 28; the system control electrode pair 252 is electrified to generate an electric field, and the electric field acts on the electrorheological fluid 253 to enable the electrorheological fluid to be instantly converted into a solid state, so that the fixing screw is tightly covered;
(4) the system controls the stepping rotating base body 1 to continuously rotate two ninety degrees to enable the screw primary screwing mechanism 2 to face downwards, and at the moment, a screw hole position needing to be screwed on the electronic clock is moved to a position opposite to the screw under the control of the workbench; the system controls the first servo motor 21 to drive the first externally threaded cylinder 23 to rotate through the first sliding key telescopic rod 22, and as the first externally threaded cylinder 23 is in threaded fit with the fixed first internally threaded sleeve 24, the first externally threaded cylinder is synchronously fed forward in the rotating process, so that the pushing screw is also fed forward and rotated to be in threaded fit with the threaded hole site, in the process, the electric field generated by the system control electrode pair 252 is reduced, so that the electrorheological fluid 253 is converted into a viscous state, and the screwing of the screw is not blocked while the morphological structure is maintained;
(5) after the screw is screwed into a certain distance, the screw posture is stable, the system controls the electric field direction of the piezoelectric ceramic plates 263 to be reversed, so that each piezoelectric ceramic plate 263 bends towards the middle part of the screw cavity 25, and each elastic rubber plate 262 deflects towards one side of the middle part of the screw cavity 25 to enclose the front end opening of the screw cavity 25 into a flower-shaped closed screw shape; then the system control electrode pair 252 is powered off, the electrorheological fluid 253 which loses the effect of an electric field is converted into a liquid state, and is rapidly extracted through the liquid extracting pipe 27 communicated with the elastic rubber sheet 262, and the electrorheological fluid 253 can be completely extracted without leakage because the liquid extracting pipe 27 is positioned at the lowest position and the rapid extraction action can generate larger negative pressure; after the electrorheological fluid 253 is rapidly pumped out, the system controls the electric field direction of the piezoelectric ceramic plates 263 to be reversed again, so that each piezoelectric ceramic plate 263 bends outwards again, and each elastic rubber plate 262 deflects outwards again to open the front end opening of the screw cavity 25; then the system controls the electromagnet 251 to be powered off so as to lose magnetism; simultaneously controlling the first servo motor 21 to rotate reversely, and retreating the screw cavity 25 under the threaded fit of the first externally threaded cylinder 23 and the first internally threaded sleeve 24 to separate the screw from the screw cavity 25;
(6) the system controls the stepping rotating seat body 1 to rotate ninety degrees again, so that the screwing head 36 of the screw re-screwing mechanism 3 is opposite to the screw; the system controls the second servo motor 31 to drive the second external thread cylinder 33 to rotate through the second telescopic rod 32 with the sliding key, and as the second external thread cylinder 33 is in threaded fit with the second internal thread sleeve 34 and the thread spacing is the same as that of the screw, the screw head 36 is fed in the rotating process and finally is inserted into the screw hole with the notch of the screw head to rotate the screw, and in the process, the screw head 36 is rotated and fed in completely synchronous with the rotation and feeding of the screw and the screw hole, so that the screw head 36 has thrust to assist the screw in the screwing process and the thrust does not damage the threads of the screw and the screw hole;
(7) the steps (1) to (6) are repeated, but from the step (6), the system controls the stepping rotating base body 1 to rotate ninety degrees each time, so that the screw initial screwing mechanism 2 and the screw re-screwing mechanism 3 are alternately performed, and a workbench below the screw initial screwing mechanism and the screw re-screwing mechanism 3 continuously adjusts screw hole positions on the electronic clock to move to specified positions according to preset parameters of the system.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (9)
1. A screw tightening machine for producing electronic clock is characterized in that: the automatic screwing device comprises a stepping rotating seat body (1) which is vertically arranged and can rotate in a stepping way in the vertical direction, a screw initial screwing mechanism (2) and a screw re-screwing mechanism (3) which are alternately arranged on the stepping rotating seat body (1) along the circumference of the stepping rotating seat body (1), and a screw feeding mechanism (4) which is arranged above the stepping rotating seat body (1); the screw feeding mechanism (4) transmits screws to the screw primary screwing mechanism (2); the stepping rotating seat body (1) rotates to drive the screw primary screwing mechanism (2) to move to a screw hole site, and the screw primary screwing mechanism (2) screws a screw into the screw hole primarily; the stepping rotating seat body (1) rotates again to drive the screw primary screwing mechanism (2) to leave the screw, and drives the screw secondary screwing mechanism (3) to move to the screw position which is primarily screwed on the screw hole site, so that the screw is completely screwed on the screw hole site;
the screw primary screwing mechanism (2) comprises a first servo motor (21), a first sliding key telescopic rod (22), a first externally threaded cylinder (23) and a first internally threaded sleeve (24) which is sleeved outside the first externally threaded cylinder (23) and is in threaded fit with the first externally threaded cylinder (23); the first internally threaded sleeve (24) is fixedly connected with the stepping rotating seat body (1) through a plurality of first connecting rods (29); the front end of the first cylinder (23) with the external thread is fixed with a screw cavity (25); the front end of the screw cavity (25) is open, and an openable petal-shaped structure (26) is arranged at the open position; a liquid suction pipe (27) is arranged on the petal-shaped structure (26); a liquid adding pipe (28) is arranged on the screw cavity (25); a boss (254) with a counter bore is arranged in the middle of the inner bottom of the screw cavity (25); the counter bore of the counter bore boss (254) comprises a straight line part (255) positioned at the lower part and a horn-shaped part (256) positioned at the upper part; the diameter of the straight line part (255) is slightly larger than the diameter of the head of the screw; an electromagnet (251) is fixedly arranged at the bottom of the linear part (255); a plurality of electrode pairs (252) are oppositely arranged on the inner side surface of the screw cavity (25); the screw cavity (25) is filled with electrorheological fluid (253) through a liquid adding pipe (28) or is used for extracting electrorheological fluid (253) through a liquid extracting pipe (27) according to the requirement.
2. A screw tightening machine for producing electronic clocks as claimed in claim 1, wherein: each petal of the petal-shaped structure (26) comprises a piezoelectric deformation sheet (261) and an elastic rubber sheet (262); one end of the piezoelectric deformation sheet (261) is fixed at the front end of the screw cavity (25), and the other end of the piezoelectric deformation sheet is fixedly connected with one end of the elastic rubber sheet (262); the piezoelectric deformation sheets (261) are controlled to bend towards the middle part of the front end of the screw cavity (25) or reversely by current, so that the elastic rubber sheets (262) are collected into the front end of the flower-shaped plugging screw cavity (25) or are opened into the flower-shaped opening of the front end of the screw cavity (25).
3. A screw tightening machine for producing electronic clocks as claimed in claim 2, wherein: the screw re-screwing mechanism (3) comprises a second servo motor (31), a second telescopic rod (32) with a sliding key, a second cylinder (33) with external threads and a second sleeve (34) with internal threads, wherein the second sleeve is sleeved outside the second cylinder (33) with external threads and is in threaded fit with the second cylinder (33) with external threads; the second internally threaded sleeve (34) is fixedly connected with the stepping rotating seat body (1) through a plurality of second connecting rods (35); the front end of the second externally threaded cylinder (33) is fixedly provided with a screwing head (36) which can be matched with the notch of the screw head; a permanent magnet ring (37) is sleeved outside the screwing head (36) in a sliding manner; the front end of the permanent magnet ring (37) is provided with a groove for embedding the head of the screw.
4. A screw tightening machine for producing electronic clocks as claimed in claim 3, wherein: the number of the screw primary screwing mechanism (2) and the screw secondary screwing mechanism (3) is two, and the included angle between the adjacent screw primary screwing mechanism (2) and the screw secondary screwing mechanism (3) is ninety degrees; the stepping rotating seat body (1) rotates ninety degrees for a single time.
5. A screw tightening machine for producing electronic clocks as claimed in claim 4, wherein: the piezoelectric deformation sheet (261) comprises a piezoelectric ceramic sheet (263) positioned in the middle and elastic resin sheets (264) coated on two sides of the piezoelectric ceramic sheet (263); the piezoelectric ceramic plate (263) can be controlled to bend and deform towards any surface by applying an electric field to the piezoelectric ceramic plate (263).
6. A screw tightening machine for producing electronic clocks as claimed in claim 5, wherein: the thread spacing of the first externally threaded cylinder (23) and the first internally threaded sleeve (24) and the thread spacing of the second externally threaded cylinder (33) and the second internally threaded sleeve (34) are the same as the thread spacing of the screw, so that the linear feed amount of the first externally threaded cylinder (23) and the second externally threaded cylinder (33) rotating for one circle is the same as the linear feed amount of the screw rotating for one circle.
7. A screw tightening machine for producing electronic clocks as claimed in claim 6, wherein: the transmission of torsion is realized under the condition of not influencing the expansion and contraction through a sliding key sliding groove matching structure arranged along the straight line direction between the first telescopic rod (22) with the sliding key and the second telescopic rod (32) with the sliding key.
8. A screw tightening machine for producing electronic clocks as claimed in claim 7, wherein: the screw feeding mechanism (4) comprises a screw conveying pipeline (41); the screw conveying pipeline (41) comprises a vertical part (42); a telescopic corrugated pipe structure (43) is arranged on the vertical part (42) to realize the expansion and contraction of the lower section part of the vertical part (42); an active telescopic rod (44) is arranged between the upper section of vertical part (42) and the lower section of the telescopic corrugated pipe structure (43); the active telescopic rod (44) drives the telescopic corrugated pipe structure (43) to stretch; a plurality of groups of elastic baffle plates (411) are arranged in the screw conveying pipeline (41) at intervals; the distance between two adjacent groups of elastic baffle plates (411) is the length of a screw; each group of elastic baffle plates (411) comprises a plurality of elastic baffle plate monomers which are uniformly distributed around the central axis of the screw conveying pipeline (41); the elastic baffle monomers incline towards the screw feeding direction respectively; a plurality of air blowing ports (413) are uniformly arranged on the screw conveying pipeline (41) between the two groups of elastic baffle plates (411) around the circumference of the screw conveying pipeline; the air blowing port (413) is used for obliquely blowing air in a pulse manner towards the screw feeding direction; smooth elastic bulges (421) are arranged on the inner wall of the lower end of the vertical part (42) so as to prevent the screw from naturally falling; a plurality of identical air blowing ports (413) are also arranged above the elastic bulge (421); the vertical part (42) can be inserted into the screw cavity (25) to be in butt joint with the boss (254) with the counter bore; the inner diameter of the opening at the lower end of the vertical part (42) is the same as that of the linear part (255); the outer side of the lower end of the vertical part (42) is provided with a chamfer which can be matched with the horn-shaped part (256).
9. A screw tightening machine for producing an electronic clock as recited in claim 8, wherein the screw tightening method of the screw tightening machine comprises the steps of:
(1) at the beginning, one of the screw initial screwing mechanisms (2) is positioned at the highest position of the upper part of the stepping rotating seat body (1); an air blowing port (413) in the screw conveying pipeline (41) blows pulse pressurized air to the screw feeding direction, the air pushes the screw to push through an elastic baffle (411), and the elastic baffle (411) supports and separates the screw from excessive inclination and is not stacked; the screw in the vertical part (42) falls to be blocked by the elastic bulge (421);
(2) the driving telescopic rod (44) drives the telescopic corrugated pipe structure (43) to extend, so that the lower end of the vertical part (42) is driven to extend into the screw cavity (25) and is inserted and matched with the boss (254) with the counter bore; at the moment, the air blowing port (413) above the elastic bulge (421) blows air again, the screw is pushed to push through the elastic bulge (421) to fall into the linear part (255), and at the moment, the system controls the electromagnet (251) to be electrified so as to tightly suck the screw at the bottom of the linear part (255); the driving telescopic rod (44) drives the telescopic corrugated pipe structure (43) to recover, so that the lower end of the vertical part (42) is driven to extend outwards out of the screw cavity (25); in the process, the system controls the direction of the electric field acting on the piezoelectric ceramic plates (263) to enable each piezoelectric ceramic plate (263) to bend and open to two sides, so that the vertical part (42) can conveniently extend into and extend out of the screw cavity (25);
(3) charging electrorheological fluid (253) into the screw cavity (25) through a liquid charging pipe (28); the system control electrode pair (252) is electrified to generate an electric field, and the electric field acts on the electrorheological fluid (253) to enable the electrorheological fluid to be instantly converted into a solid state, so that the screw is tightly covered;
(4) the system controls the stepping rotating base body (1) to continuously rotate for two ninety degrees, so that the screw primary screwing mechanism (2) faces downwards, and at the moment, a screw hole position needing to be screwed on the electronic clock is moved to a position opposite to the screw under the control of the workbench; the system controls the first servo motor (21) to drive the first externally threaded cylinder (23) to rotate through the first sliding key telescopic rod (22), and the first externally threaded cylinder (23) is in threaded fit with the fixed first internally threaded sleeve (24), so that the screws are synchronously fed forward in the rotating process, and are pushed to be fed forward and rotated to be in threaded fit with the threaded hole sites, in the process, the electric field generated by the system control electrode pair (252) is reduced, so that the electrorheological fluid (253) is converted into a viscous state, and the screw is not blocked from being screwed in while the morphological structure is maintained;
(5) after the screw is screwed into a certain distance, the screw posture is stable, the system controls the electric field direction of the piezoelectric ceramic plates (263) to be reversed, so that each piezoelectric ceramic plate (263) is bent towards the middle part of the screw cavity (25), and each elastic rubber plate (262) deflects towards one side of the middle part of the screw cavity (25) to enclose the front end opening of the flower-shaped closed screw cavity (25); then the system control electrode pair (252) is powered off, electrorheological fluid (253) losing the effect of an electric field is converted into liquid, and is rapidly extracted through the liquid extracting pipe (27) communicated with the elastic rubber sheet (262), and the electrorheological fluid (253) can be completely extracted and cannot leak because the liquid extracting pipe (27) is located at the lowest position and the rapid extraction action can generate larger negative pressure; after the electrorheological fluid (253) is rapidly pumped out, the system controls the electric field direction of the piezoelectric ceramic plates (263) to be reversed again, so that each piezoelectric ceramic plate (263) is bent outwards again, and each elastic rubber plate (262) is deflected outwards again to open the front end opening of the screw cavity (25); then the system controls the electromagnet (251) to be powered off, so that the electromagnet loses magnetism; simultaneously controlling the first servo motor (21) to rotate reversely, and retreating the screw cavity (25) under the threaded fit of the first externally threaded cylinder (23) and the first internally threaded sleeve (24) to separate the screw from the screw cavity (25);
(6) the system controls the stepping rotating base body (1) to rotate ninety degrees again, so that the screwing head (36) of the screw screwing mechanism (3) is opposite to the screw; the system controls the second servo motor (31) to drive the second externally threaded cylinder (33) to rotate through the second telescopic rod (32) with the sliding key, and as the second externally threaded cylinder (33) is in threaded fit with the second internally threaded sleeve (34) and the thread spacing is the same as that of the screw, in the rotating process, the screwing head (36) is fed, and finally the screw is inserted into the screw hole site in a matched mode with the notch of the screw head, and in the process, because the screwing head (36) rotates and feeds and the screw is completely synchronous with the rotation and the feeding of the screw and the screw hole site, the screwing head (36) has thrust to assist the screw to screw in the screwing process, and the thrust does not damage the threads of the screw and the screw hole site;
(7) the steps (1) to (6) are repeated, but from the step (6), the system controls the stepping rotating base (1) to rotate ninety degrees each time, so that the screw initial screwing mechanism (2) and the screw re-screwing mechanism (3) are alternately performed, and a workbench below the screw initial screwing mechanism continuously adjusts screw hole positions of screws on the electronic clock to move to specified positions according to preset parameters of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410070952.4A CN117583879B (en) | 2024-01-18 | 2024-01-18 | Screw tightening machine for producing electronic clock |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410070952.4A CN117583879B (en) | 2024-01-18 | 2024-01-18 | Screw tightening machine for producing electronic clock |
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| CN117583879A CN117583879A (en) | 2024-02-23 |
| CN117583879B true CN117583879B (en) | 2024-03-19 |
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|---|---|---|---|---|
| DE19954809A1 (en) * | 1999-11-13 | 2001-05-17 | Volkswagen Ag | Screw device has electro-rheological and/or magneto-rheological coupling between drive and output and electronic control unit interacting with drive, coupling, output and/or screw unit |
| CN107052772A (en) * | 2017-05-17 | 2017-08-18 | 浙江工贸职业技术学院 | The coaxial assembly system of magneto-rheological vibration damper piston assembly |
| CN107253043A (en) * | 2017-06-29 | 2017-10-17 | 重庆大学 | A kind of variable flexibility mechanical arm tool for twisting screw of Three Degree Of Freedom |
| CN111250969A (en) * | 2020-03-16 | 2020-06-09 | 江苏信息职业技术学院 | Automatic assembly equipment of bolt with adjustable pretightening force based on magneto-rheological effect |
-
2024
- 2024-01-18 CN CN202410070952.4A patent/CN117583879B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19954809A1 (en) * | 1999-11-13 | 2001-05-17 | Volkswagen Ag | Screw device has electro-rheological and/or magneto-rheological coupling between drive and output and electronic control unit interacting with drive, coupling, output and/or screw unit |
| CN107052772A (en) * | 2017-05-17 | 2017-08-18 | 浙江工贸职业技术学院 | The coaxial assembly system of magneto-rheological vibration damper piston assembly |
| CN107253043A (en) * | 2017-06-29 | 2017-10-17 | 重庆大学 | A kind of variable flexibility mechanical arm tool for twisting screw of Three Degree Of Freedom |
| CN111250969A (en) * | 2020-03-16 | 2020-06-09 | 江苏信息职业技术学院 | Automatic assembly equipment of bolt with adjustable pretightening force based on magneto-rheological effect |
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