CN111823613A - Pressure shearing device, laying head and automatic fiber laying machine - Google Patents
Pressure shearing device, laying head and automatic fiber laying machine Download PDFInfo
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- CN111823613A CN111823613A CN202010718972.XA CN202010718972A CN111823613A CN 111823613 A CN111823613 A CN 111823613A CN 202010718972 A CN202010718972 A CN 202010718972A CN 111823613 A CN111823613 A CN 111823613A
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- shearing
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/38—Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
- B29C70/382—Automated fiber placement [AFP]
- B29C70/384—Fiber placement heads, e.g. component parts, details or accessories
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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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
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention belongs to the technical field of fiber placement machines, and particularly relates to a compression shearing device, a placement head and an automatic fiber placement machine. A compression shearing apparatus comprising: one end of the shearing piece is a shearing end, the other end of the shearing piece is connected with the driving piece, and the shearing piece stretches under the action of the driving piece; the pressing piece is assembled between the shearing end and the driving piece in a sliding mode, one end, close to the shearing end, of the pressing piece is a pressing end, and the pressing end is provided with an opening; the pressing piece slides towards the shearing end under the action of the elastic piece so that the shearing end is accommodated in the opening; when the acting force of the elastic piece is overcome and acts on the pressing piece, the shearing end can extend out of the opening. The technical problems that a pressing device and a shearing device of a laying head are arranged separately, the pressing device and the shearing device need to be operated successively to shear fibers, and the structure and the operation are complex in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of fiber placement machines, and particularly relates to a compression shearing device, a placement head and an automatic fiber placement machine.
Background
Since the 21 st century, the composite material is used as an advanced material, and is widely applied to the fields of aerospace, national defense equipment, automobile manufacturing, energy development and the like by virtue of a plurality of advantages such as high specific strength, fatigue resistance, corrosion resistance and the like, so that the rapid development of the related fields is promoted. With the wide application of advanced composite materials in various industrial fields and the large-scale and complicated composite material products, the rapid development of composite material molding and manufacturing technology is greatly promoted. The automatic composite material fiber laying technology is used as a typical manufacturing technology for preparing composite material components, so that the fields of aerospace, automobile manufacturing, energy development and the like are developed and are continuously strengthened. Has important value in the fields of aerospace and the like.
The automatic composite material laying technology is a key technology for manufacturing composite material components, and becomes one of the composite material forming technologies which develop the fastest speed in recent years. The composite material laying forming technology combines a mechanical arm and a laying head, and composite material fibers are laid on the surface of a core mold to form a composite material component. The laying head comprises a yarn guide system, a re-feeding mechanism, a clamping mechanism, a heating mechanism, a shearing mechanism, a pressing mechanism and the like, and all the mechanisms are mutually coordinated and matched to jointly complete the laying operation of the thermoplastic composite material.
Automatic equipment degree of automation of putting of laying among the prior art is not high, mostly includes closing device, heavily send the device, and shearing mechanism causes the structure complicacy, and the unable direct positioning section bar of shearing mechanism needs the closing device cooperation, and closing device and shearing mechanism distance are far away, cause the technical problem that the shearing precision is low.
Disclosure of Invention
The invention provides a compression-shearing device, a laying head and an automatic fiber laying machine, and solves the technical problems that in the prior art, a compressing device and a shearing device of the laying head are separately arranged, the compressing device and the shearing device need to be operated in sequence to compress and shear fibers, and the structure and the operation are complex. The technical scheme of the invention is as follows:
a compression shearing apparatus comprising: one end of the shearing piece is a shearing end, the other end of the shearing piece is connected with the first driving piece, and the shearing piece stretches under the action of the first driving piece; the pressing piece is assembled between the shearing end and the first driving piece in a sliding mode, one end, close to the shearing end, of the pressing piece is a pressing end, and the pressing end is provided with an opening; the pressing piece slides towards the shearing end under the action of the elastic piece so that the shearing end is accommodated in the opening; when the acting force of the elastic piece is overcome and acts on the pressing piece, the shearing end can extend out of the opening.
The compression and shearing device comprises a compression piece, a shearing piece and an elastic piece, wherein one end of the shearing piece is a shearing end, the other end of the shearing piece is connected with a first driving piece, the shearing piece stretches under the action of the first driving piece, the compression piece is assembled between the shearing end and the first driving piece in a sliding mode, and the compression of a section bar is realized under the action of the first driving piece; one end of the pressing piece close to the shearing end is a pressing end, the pressing end is provided with an opening, and under the action of the elastic piece, the pressing piece slides towards the shearing end so that the shearing end is accommodated in the opening; the pressing part and the shearing part are integrally assembled to form an integral structure, the first driving part can drive the pressing part and the shearing part to move towards the sheared section bar together during shearing, when the pressing part presses the section bar, the first driving part can continue to drive the shearing part to extend out relative to the pressing part to shear the section bar, and the driving and control of the pressing part and the shearing part can be realized only by one driving part in the whole process; in an initial state, under the action of the elastic piece, the shearing piece is accommodated in the pressing piece, so that on one hand, the pressing piece can press the section in multiple directions, and the shearing effect is good; on the other hand, the shearing part can be effectively protected.
According to one embodiment of the invention, the cutting element is connected with the driving end of the driving element through a connecting element, the pressing element is slidably assembled on the connecting element, and the elastic element is sleeved on the connecting element and acts on the pressing element.
According to one embodiment of the invention, the opening is a U-shaped opening.
A laying head comprises the pressing device and a guide, wherein a tow channel is formed on the guide to convey fiber tows, and a shearing end of the shearing piece is arranged towards the tow channel to shear the fiber tows.
The laying head comprises a pressing and shearing device and a guide piece, wherein a tow channel is formed in the guide piece to convey fiber tows, the shearing end of the shearing piece is arranged towards the tow channel, the shearing piece and the pressing piece move towards the tow channel under the action of the first driving piece when the fiber tows are sheared, the pressing piece presses the fiber tows when the fiber tows move to the position of the fiber tows, the first driving piece can continuously drive the shearing piece to extend out relative to the pressing piece to shear the fiber tows, the purpose that the profile is firstly pressed and sheared is completed is achieved, and the shearing piece and the pressing piece move away from the tow channel under the action of the first driving piece.
According to one embodiment of the invention, the tow channel is concave, a cutting groove is arranged at the position, corresponding to the cutting end, of the tow channel, the pressing piece can extend into the tow channel to press the fiber tows, and the cutting end can extend into the cutting groove to cut the fiber tows.
According to one embodiment of the invention, the depth of the undercut is greater than the depth of the tow channel and the width of the undercut is greater than the width of the tow channel.
According to one embodiment of the invention, the tow channel is further provided with a guide structure, the guide structure comprises a guide wheel and a protection plate, the guide wheel is arranged at the inlet of the tow channel to guide the fiber tows to enter the tow channel, the protection plate is arranged at the downstream of the press shearing device and covers the tow channel, and the protection plate can be matched with the press shearing device to prevent the fiber tows from being separated from the tow channel when the tows are sent again.
According to one embodiment of the invention, the fiber tow re-feeding device further comprises a re-feeding device, the re-feeding device comprises a driving re-feeding roller and a driven re-feeding roller, the driving re-feeding roller is rotatably arranged on the guide piece, the outer peripheral surface of the driving re-feeding roller slightly protrudes out of the tow channel, and the driven feeding roller can extend into the tow channel to be matched with the driving re-feeding roller to re-feed fiber tows.
According to one embodiment of the invention, the device further comprises a feeding assembly and a pressurizing and heating assembly, wherein the feeding assembly provides fiber tows for the guide member, and the guide member conveys the fiber tows to the pressurizing and heating assembly.
The automatic fiber placement machine comprises the placement head and the mechanical arm, wherein the placement head is arranged at the free end of the mechanical arm, and the mechanical arm drives the placement head to move so as to place the fiber.
The automatic fiber placement machine comprises the placement head and the mechanical arm, the placement head is driven by the mechanical arm to move on different dimensions, placement actions can be flexibly completed, and placement quality can be effectively improved.
Based on the technical scheme, the invention can realize the following technical effects:
1. the compression and shearing device comprises an elastic piece, a compression piece and a shearing piece, wherein one end of the shearing piece is a shearing end, the other end of the shearing piece is connected with a driving piece, and the shearing piece stretches under the action of a first driving piece; the pressing piece is assembled between the shearing end and the driving piece in a sliding mode, and the section bar is pressed under the action of the first driving piece; one end of the pressing piece close to the shearing end is a pressing end, the pressing end is provided with an opening, and under the action of the elastic piece, the pressing piece slides towards the shearing end so that the shearing end is accommodated in the opening; when moving to section bar department, compress tightly a compaction section bar, first driving piece can continue to drive the shearing piece and stretch out for compressing tightly the piece and carry out the shearing of section bar, compresses tightly a and the integrative assembly of shearing piece forms overall structure, and this device only needs a driving piece can realize compressing tightly the drive and the control of piece and shearing piece, simple structure, convenient operation.
2. According to the compression and shearing device, the compression piece and the shearing piece are used for compressing and shearing the section bar under the action of the first driving piece, the compression piece is non-cylindrical and can reduce the width of a correspondingly arranged strand channel, the U-shaped opening is formed in the middle of the compression and shearing device, the shearing piece is located in the opening, when the section bar is compressed, two sides of a shearing point are compressed, the distance is short, the deflection of the section bar is reduced, and the cutting precision is high.
3. The compression and shearing device further comprises a connecting piece, one end of the connecting piece is connected with the shearing piece, the other end of the connecting piece is connected with the driving end of the first driving piece, the compression piece is assembled on the connecting piece in a sliding mode, the elastic piece is sleeved on the connecting piece and acts on the compression piece, the compression piece can only move linearly along the connecting piece, and the connecting piece plays a role in guiding the compression piece.
4. The laying head comprises a pressing and shearing device and a guide piece, wherein a tow channel is formed on the guide piece and used for conveying fiber tows, the tow channel is concave, when the tow channel moves to the position of the fiber tows, the pressing piece presses a section, the first driving piece can continuously drive the shearing piece to extend out relative to the pressing piece to shear the fiber tows, a cutting groove is formed in the position, corresponding to a shearing end, of the tow channel, the depth of the cutting groove is larger than that of the tow channel, the shearing piece can extend into the cutting groove after shearing the fibers, and the shearing end and the tow channel are prevented from being damaged due to rigid contact.
5. The laying head further comprises a guide structure, the guide structure comprises an inlet guide wheel and a protection plate, the inlet guide wheel is arranged at an inlet of the tow channel to guide fiber tows to enter the tow channel, the protection plate is arranged on the guide piece in the width direction and located on the downstream of the compression shearing device, the protection plate covers the tow channel in an inclined mode, when fibers are fed again, the pressing piece and the shearing piece move away from the tow channel under the action of the first driving piece, when the compression shearing device stops moving, the pressing piece and the protection plate are kept in contact, and when the driving re-feeding roller and the driven re-feeding roller are matched with each other to convey the fiber tows, the fiber tows cannot be separated from the tow channel under the shielding of the pressing piece and the protection plate.
6. The automatic fiber placement machine comprises the placement head and the mechanical arm, the placement head is driven by the mechanical arm to move on different dimensions, placement actions can be flexibly completed, and placement quality can be effectively improved.
Drawings
FIG. 1 is a schematic structural view of a compression shearing apparatus;
FIG. 2 is a schematic structural view of a pressing member;
FIG. 3 is a schematic structural view of the placement head;
FIG. 4 is a partial block diagram of FIG. 3;
FIG. 5 is a cross-sectional view of FIG. 4;
FIG. 6 is a schematic view of the guide;
FIG. 7 is a schematic view of the structure in a compacted uncut state;
FIG. 8 is a schematic view of the structure in a compression shear state;
FIG. 9 is a schematic structural view of a refeed apparatus;
FIG. 10 is a schematic view of the configuration of the condition of the double tow;
FIG. 11 is a schematic view of the placement machine configuration;
in the figure: 1-a compression shear device; 11-a shear member; 111-a cut end; 12-a compression member; 121-a compression end; 1211-opening; 1212-a compression surface; 13-a first drive member; 14-an elastic member; 15-a connector; 151-a first limiting structure; 152-a second limit structure;
2-a guide; 21-a tow channel; 211-inlet guide wheels; 212-guard plate; 2121-covering surface; 22-grooving; 23-installing a channel; 24-a mounting seat; 241-a first guide wheel; 242 — a second drive member; 25-a support frame; 251-a second guide wheel;
3-a re-feeding device; 31-active refeed roller; 311-a fourth drive; 32-driven reconveying rollers; 321-a mounting rack; 322-a third drive member;
4-a feed assembly; 41-a feeding device; 42-a film collecting device; 43-a guide;
5-heating and pressurizing the assembly; 51-a heating device; 511-infrared heating element; 512-hot air heating element; 52-a pressure applying device; 521-a press roll;
6, a mechanical arm; 7-creel.
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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1 to 11, the present embodiment provides a compression shear apparatus 1, which includes a shear member 11, a compression member 12, and an elastic member 14, wherein one end of the shear member 11 is a shear end 111, the other end of the shear member 11 is connected to a first driving member 13, and the shear member 11 is extended and retracted under the action of the first driving member 13; the pressing piece 12 is slidably assembled between the shearing end 111 and the first driving piece 13, one end of the pressing piece 12 close to the shearing end 111 is a pressing end 121, the pressing end 121 is provided with an opening 1211, and under the action of the elastic piece 14, the pressing piece 12 slides towards the shearing end 111 to enable the shearing end 111 to be accommodated in the opening 1211; when the acting force of the elastic part 14 is overcome and acts on the pressing part 12, the shearing end 111 can extend out of the opening 1211, specifically, when the profile is sheared, the shearing part 11 and the pressing part 12 move towards the profile under the action of the first driving part 13, when the profile moves to the profile, the pressing part 12 presses the profile, the first driving part 13 can continuously drive the shearing part 11 to extend out relative to the pressing part 12 to shear the profile, the pressing part 12 and the shearing part 11 are integrally assembled to form an integral structure, and the driving and control of the pressing part 12 and the shearing part 11 can be realized only by one driving part in the whole shearing process; in an initial state, under the action of the elastic part 14, the shearing part 11 is accommodated in the pressing part 12, on one hand, the pressing part 12 can press the section in multiple directions, and the shearing effect is good; on the other hand, the cutter 11 can be effectively protected.
Preferably, the pressing member 12 is wedge-shaped and non-cylindrical, the width of the correspondingly arranged tow channel 21 can be reduced, the space is saved, the U-shaped opening 1211 is arranged in the middle of the pressing end 121, when the profile is pressed, two sides of the shearing point are both pressed, the distance is short, the offset of the profile is reduced, and the cutting precision is high.
Further, the compression shearing device of the embodiment further comprises a connecting piece 15, one end of the connecting piece 15 is connected with the shearing piece 11, the other end of the connecting piece 15 is connected with the driving end of the first driving piece 13, the compression piece 12 is slidably assembled on the connecting piece 15, the elastic piece 14 is sleeved on the connecting piece 15 and acts on the compression piece 12, the compression piece 12 can only move linearly along the connecting piece 15, and the connecting piece 15 plays a role in guiding the compression piece 12. The interval is provided with first limit structure 151 and second limit structure 152 on connecting piece 15 with the slip range of spacing compressing tightly piece 12 on connecting piece 15, the holistic both ends that compressing tightly piece 12 and elastic component 14 formed act on first limit structure 151 and second limit structure 152 respectively, second limit structure 152 is located shearing piece 11 and compresses tightly between the piece 12, can avoid shearing piece 11 and compressing tightly 12 direct contact collision, prevent to damage shearing piece 11 and compressing tightly piece 12, the size of second limit structure 152 is less, can hold in compressing tightly the opening of piece 12. The first stop structure 151 is located between the elastic member 14 and the first driving member 13, one end of the elastic member 14 acts on the first stop structure 151, and the other end acts on the non-pressing end of the pressing member 12, preferably, the elastic member 14 is always in a compressed state to abut the pressing member 12 against the second stop structure 152, and the shearing member 11 is located in the opening 1211.
It should be noted that the first driving member 13 can be selected from, but not limited to, an air cylinder as long as it can drive the compressing member 12 and the shearing member 11 to move telescopically.
The embodiment also provides a shop head, shop head is including pressure shear device 1 and guide 2, be formed with tow passageway 21 on the guide 2 in order to carry the fibre tow, tow passageway 21 corresponds the department and is equipped with pressure shear device 1, the shearing end 111 of shearing piece 11 sets up in order to cut the fibre tow towards tow passageway 21, tow passageway 21 is concave, prevent fibre tow bias in tow passageway 21, tow passageway 21 is provided with grooving 22 with shearing end 111 corresponds the department, shearing piece 11 is cut fibre tow and is stretched into grooving 22 in, it receives the damage to avoid shearing end 111 and tow passageway 21 rigid contact.
According to a preferred technical scheme of the embodiment, the guide member 2 is in a wedge shape, the number of the tow channels 21 is at least two, the at least two tow channels 21 are arranged on two opposite inclined surfaces of the guide member 2, at least one tow channel 21 can be arranged on each inclined surface, when the at least two tow channels 21 are arranged on each inclined surface, the at least two tow channels 21 are parallel to each other, each tow channel 21 is gradually inclined inwards from the inlet to the outlet, and each tow channel 21 corresponds to one group of the compression shearing devices 1. The wedge-shaped guide 2 can save space and effectively avoid interference with other devices.
According to a preferred technical scheme of the embodiment, the tow channel 21 is provided with a guide structure, the guide structure comprises an inlet guide wheel 211 and a protection plate 212, the inlet guide wheel 211 is arranged at the inlet of the tow channel 21 to guide the fiber tows to enter the tow channel 21, the protection plate 212 is located at the downstream of the compression shearing device 1, and the protection plate 212 obliquely covers the tow channel 21 and can prevent dust from falling into the tow channel 21. As shown in fig. 10, when the fiber is sent again, the pressing member 12 and the shearing member 11 move together away from the tow channel 21 under the action of the first driving member 13, after a certain distance of movement, the press shearing device 1 stops moving, at this time, the pressing member 12 and the protection plate 21 are kept in contact, the fiber tow is sent again under the action of the resending device 3, the fiber tow cannot be separated from the tow channel 21 due to self gravity under the shielding of the pressing member 12 and the protection plate 212, and preferably, when the fiber is sent again, the pressing surface 1212 of the pressing member 12 and the covering surface 2121 of the protection plate 212 are on the same surface, so that the fiber tow can be better conveyed.
According to a preferred technical scheme of the embodiment, the cutting end 111 of the cutting member 11 is inclined to facilitate rapid cutting of the fiber tows, the pressing end 121 of the pressing member 12 is an inclined surface to facilitate matching of the pressing member 12 and the tow channel 21, so as to better press the fiber tows, the depth of the cutting groove 22 is greater than that of the tow channel 21, and the width of the cutting groove 22 is greater than that of the tow channel 21, so that the cutting member 11 can be better protected.
In order to complete the refeeding of the fibers, the laying head of the present embodiment further includes a refeeding device 3, and the refeeding device 3 is located between the inlet guide wheels 211 and the press shear device 1. The refeeding device 3 comprises a driving refeeding roller 31 and a driven refeeding roller 32, the guide member 2 is provided with an installation channel 23 along the width direction, the driving refeeding roller 31 is rotatably installed on the installation channel 23, the outer peripheral surface of the driving refeeding roller 31 slightly protrudes out of the tow channel 21, the driving refeeding roller 31 is driven by a fourth driving member 311 to rotate, the fourth driving member 311 is fixed on an installation structure, the driven refeeding roller 32 is arranged at the corresponding position of the driving refeeding roller 31, the driven refeeding roller 32 is arranged outside the guide member 2, the driven refeeding roller 32 is rotatably assembled on an installation frame 321, the installation frame 321 is connected with the driving end of the third driving member 322, the installation frame 321 drives the driven refeeding roller 32 to stretch and retract under the driving of the third driving member 322, and the third driving. When the fiber is sent again, the driven refeed roller 32 moves towards the driving refeed roller 31 under the driving of the third guide member 2, when the peripheral circles of the driven refeed roller 32 and the driving refeed roller 31 are tangent, and the fiber bundle is located between the driven refeed roller 32 and the driving refeed roller 31, the driven refeed roller 32 stops moving towards the driving refeed roller 31, the driving refeed roller 31 is driven to rotate by the fourth drive member 311, the fiber bundle is driven to move downwards along the fiber bundle channel 21 through the rotating friction force, and the refeed of the fiber bundle is achieved.
As shown in fig. 3, the laying head of the embodiment further includes a feeding assembly 4, the feeding assembly 4 is fixedly installed on the creel 7, the feeding assembly 4 includes a feeding device 41, a guiding device 43 and a film collecting device 42, the feeding device 41 provides the prepreg yarns, the film collecting device 42 collects the lining paper, the guiding device 43 controls the tension of the tows, the feeding device 41, the guiding device 43 and the film collecting device 42 are arranged around the guiding member 2, the feeding assembly 4 provides the fiber tows for the guiding member 2, the feeding device 41, the guiding device 43 and the film collecting device 42 are driven to rotate by respective driving members, the driving members are not limited to motors, and the driving members can be selected from the group consisting of motors as long as the feeding device 41, the guiding device 43 and the film collecting device 42.
Preferably, the feed assemblies 4 are in multiple groups, and the number of the feed assemblies 4 is the same as that of the tow channels 21; the plurality of groups of feeding assemblies 4 can simultaneously feed the guide members 2 under the guiding action of the first guide wheels 241.
The guide 2 conveys the fiber tows to the pressurizing heating assembly 5, the heating pressurizing assembly 5 comprises a heating device 51 and a pressure applying device 52, the heating device 51 is located at the tow outlet, the heating device 51 is connected to the mounting structure, the pressure applying device 52 is connected to the mounting structure, and the two cooperate with each other to lay the fibers. Specifically, the heating device 51 includes an infrared heating element 511 and a hot air heating element 512, the infrared heating element 511 uses an infrared quartz heating lamp tube as a heat source, and heats the filament bundle by direct radiation, the hot air heating element 512 supplies air from the outside and heats the filament bundle by using a thermal resistor as a heat source, and the filament bundle and the hot air heating element heat the filament bundle together, and the infrared heating element 511 is used as a preheating element and the hot air heating element 512 which heats the filament bundle uniformly is used as a main heating element in consideration that the infrared heating element is a single-sided heating and cannot maintain the temperature; the pressing device 52 includes a pressing roller 521, and the pressing roller 521 is rotatably mounted on the mounting structure.
In order to assemble the structures of the compression shear device 1, the guide 2, the refeeding device 3 and the like, the installation structure needs to be reasonably arranged. In this embodiment, the mounting structure includes two mounting bases 24 and two support frames 25, the two support frames 25 are mounted on the mounting surface of the mounting base 24 in parallel, the guide 2 is located between the two support frames 25 and is fixedly connected with the mounting base 24, and two parallel surfaces of the guide 2 are in clearance fit with the support frames 25 on both sides; the two sides of the two support frames 25 are connected through a connecting frame, the compression shearing device 1 and the driven refeed roller 32 are arranged on the connecting frame, specifically, the first driving piece 13 is fixedly arranged on the connecting frame, and the telescopic end of the first driving piece 13 stretches and retracts to drive the shearing piece 11 and the pressing piece 12 to stretch and retract towards and away from the tow channel 21; the third driving member 322 is fixedly installed on the connecting frame, and the telescopic end of the third driving member 322 stretches and retracts to drive the driven refeeding roller 32 to stretch and retract towards and away from the driving refeeding roller 31.
According to a preferred aspect of the present embodiment, the mounting structure is telescopically assembled to adjust the pressing force of the pressing roller 521. The mounting structure is telescopically arranged on the creel 7 through the second driving piece 242, specifically, the second driving piece 242 is assembled on the creel 7, and the telescopic end of the second driving piece 242 is connected with the mounting seat 24 to drive the mounting seat 24 to stretch and contract, so as to control the pressing roller 521 to move close to the surface of the workpiece, and thus laying of fibers is realized.
The embodiment also provides an automatic fiber placement machine, which comprises a placement head and a mechanical arm 6, wherein the placement head is connected with the free end of the mechanical arm 6 through a creel 7, the mechanical arm 6 drives the placement head to move on different dimensions, the placement action can be flexibly completed, and the placement quality can be effectively improved.
It should be noted that the second driving element 242 and the third driving element 322 may be selected and not limited to be air cylinders, and only can drive the mounting seat 24 and the driven retransmission wheel 32 to extend and retract, and the fourth driving element 311 may be selected and not limited to be a motor, as long as the driving retransmission wheel 31 is driven to rotate.
Based on the structure, the working principle of the automatic fiber placement machine of the embodiment is as follows:
thermoplastic fibers are sleeved on a feeding device 41, prepreg fiber tows are separated from lining paper manually, the lining paper is wound on a film collecting device 42, the prepreg fiber tows are wound on a guide device 43, the prepreg fiber tows enter the guide piece 2 through a first guide wheel 241 at the lower end of a mounting seat 24 and then enter a tow channel 21 through the guide of an inlet guide wheel 211 at the upper end of the guide piece 2, the prepreg fiber tows can be prevented from being separated from the tow channel 21 through the inlet guide wheel 211, the prepreg fiber tows pass through a second guide wheel 251 after passing through a protection plate 212 along the tow channel 21, the prepreg fiber tows are heated by a heating device 51 near the second guide wheel 251, the prepreg fiber tows are heated and softened to facilitate laying, and finally reach below a laying machine pressing roller 521, so that manual guiding of the prepreg fiber tows is completed, in subsequent fiber laying, a driving piece is the feeding device 41, a pressing roller 521, The guiding device 43 and the film collecting device 42 rotate to provide acting force to realize automatic feeding and conveying of fibers, the second driving piece 242 applies acting force through the mounting seat 24 to control the distance between the pressing roller 521 and the surface of the workpiece, the mechanical arm 6 drives the pressing roller 521 to move close to the surface of the workpiece, and laying of the fibers is realized, so that automatic fiber laying operation can be started after manual guiding of the pre-impregnated fiber tows is completed.
When the fiber placement needs to be stopped, the first driving piece 13 drives the shearing piece 11 and the pressing piece 12 to move towards the cutting groove 22, the pressing piece 12 presses the fiber tows, the shearing piece 11 stretches out of the pressing piece 12 under the continuous action of the first driving piece 13 to shear the fiber tows, and after the shearing is finished, the shearing piece 11 and the pressing piece 12 move away from the cutting groove 22 under the driving of the first driving piece 13.
When the fiber needs to be laid again, the driven refeed roller 32 moves towards the driving refeed roller 31 under the driving of the third guide 2, when the outer circumference circles of the driven refeed roller 32 and the driving refeed roller 31 are tangent, and the filament bundle is positioned between the driven refeed roller 32 and the driving refeed roller 31, the driven refeed roller 32 stops moving towards the driving refeed roller 31, meanwhile, the pressing piece 12 and the shearing piece 11 move back to the direction away from the filament bundle channel 21 under the action of the first driving piece 13, the driving refeed roller is driven to rotate by the fourth driving piece 311 under the state that the pressing piece 12 and the protective plate 212 are kept in contact, the fiber filament bundle is driven to move towards the press roller 521 through the rotating friction force, the filament bundle is conveyed to the press roller 521 through the pressing piece 12 and the protective plate 212, after the refeed, the driven refeed roller 32 is driven by the third driving piece 322 to be away from the filament bundle channel 21, the driving refeed roller 31 stops rotating, the filament bundle is, the laying of the fibers is continued, thus achieving automatic laying of the fibers.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A compression shearing apparatus, comprising:
the shearing device comprises a shearing piece (11), wherein one end of the shearing piece (11) is a shearing end (111), the other end of the shearing piece (11) is connected with a first driving piece (13), and the shearing piece (11) stretches under the action of the first driving piece (13);
a pressing piece (12), wherein the pressing piece (12) is slidably assembled between the shearing end (111) and the first driving piece (13), one end of the pressing piece (12) close to the shearing end (111) is a pressing end (121), and the pressing end (121) is provided with an opening (1211);
an elastic member (14), under the action of the elastic member (14), the pressing member (12) slides towards the shearing end (111) to enable the shearing end (111) to be accommodated in the opening (1211); the cutting end (111) can extend out of the opening (1211) when acting on the pressing piece (12) against the action force of the elastic piece (14).
2. A compression shear device as claimed in claim 1, wherein the shear member (11) is connected to the driving end of the first driving member (13) by a connecting member (15), the compression member (12) is slidably fitted on the connecting member (15), and the elastic member (14) is fitted over the connecting member (15) and acts on the compression member (12).
3. A compression shearing device as in claim 1, characterized in that said opening (1211) is a U-shaped opening (1211).
4. A placement head, comprising
The compression shear device (1) according to any one of claims 1 to 3;
a guide (2), a tow channel (21) formed on the guide (2) for conveying the fiber tows, and a cutting end (111) of the cutting member (11) disposed toward the tow channel (21) for cutting the fiber tows.
5. A placement head according to claim 4, characterized in that the tow channel (21) is concave, that a slot (22) is provided in the tow channel (21) in correspondence of the cutting end (111), that the pressing piece (12) can be inserted into the tow channel (21) for pressing the fiber tow, and that the cutting end (111) can be inserted into the slot (22) for cutting the fiber tow.
6. A placement head according to claim 5, characterized in that the depth of the incisions (22) is greater than the depth of the tow channel (21), the width of the incisions (22) being greater than the width of the tow channel (21).
7. A head according to claim 5, the tow channel (21) being further provided with a guide structure comprising an entry guide wheel (211) and a guard plate (212), the entry guide wheel (211) being provided at the entry of the tow channel (21) to guide the fibre tows into the tow channel (21), the guard plate (212) being located downstream of the pinch-off device (1) and covering the tow channel (21), the guard plate (212) being cooperable with the pinch-off device (1) to prevent the fibre tows from escaping from the tow channel (21) when the tows are being re-fed.
8. A placement head according to any one of claims 4 to 7, characterized by further comprising a refeeding device (3), wherein the refeeding device (3) comprises a driving refeeding roller (31) and a driven refeeding roller (32), the driving refeeding roller (31) is rotatably arranged on the guide member (2), the outer circumferential surface of the driving refeeding roller (31) slightly protrudes out of the tow channel (21), and the driven refeeding roller (32) can extend into the tow channel (21) under the driving of a third driving member (322) to cooperate with the driving refeeding roller (31) to refeed the fiber tows.
9. A head according to claim 4, further comprising a feeder assembly (4), a pressure and heating assembly (5), the feeder assembly (4) supplying the guide (2) with fiber tows, the guide (2) delivering the fiber tows to the pressure and heating assembly (5).
10. An automatic fiber laying machine comprising a laying head according to any one of claims 4 to 9, arranged at the free end of the robot arm (6), and a robot arm (6), the robot arm (6) moving the laying head for laying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010718972.XA CN111823613A (en) | 2020-07-23 | 2020-07-23 | Pressure shearing device, laying head and automatic fiber laying machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010718972.XA CN111823613A (en) | 2020-07-23 | 2020-07-23 | Pressure shearing device, laying head and automatic fiber laying machine |
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| CN111823613A true CN111823613A (en) | 2020-10-27 |
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| CN202010718972.XA Pending CN111823613A (en) | 2020-07-23 | 2020-07-23 | Pressure shearing device, laying head and automatic fiber laying machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI745177B (en) * | 2020-11-24 | 2021-11-01 | 楊景森 | Processing equipment for making composite material structures using mechanical arms |
| TWI750106B (en) * | 2020-11-24 | 2021-12-11 | 楊景森 | Method for making composite material structure using mechanical arm |
| CN114589939A (en) * | 2020-12-03 | 2022-06-07 | 杨景森 | Processing equipment and method for manufacturing composite material structure by using mechanical arm |
-
2020
- 2020-07-23 CN CN202010718972.XA patent/CN111823613A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI745177B (en) * | 2020-11-24 | 2021-11-01 | 楊景森 | Processing equipment for making composite material structures using mechanical arms |
| TWI750106B (en) * | 2020-11-24 | 2021-12-11 | 楊景森 | Method for making composite material structure using mechanical arm |
| CN114589939A (en) * | 2020-12-03 | 2022-06-07 | 杨景森 | Processing equipment and method for manufacturing composite material structure by using mechanical arm |
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