CN116278012A - PEEK strip continuous gradual change bending-stitching pipe making device and method - Google Patents

Abstract

The invention discloses a PEEK strip continuous gradual change bending-sewing pipe making device and a PEEK strip continuous gradual change bending-sewing pipe making method, and relates to the field of material molding; the device comprises a forming unit for converting the strip into a tube; the sewing unit is used for fusion bonding of the contact joint of the pipe; the heating unit is used for heating the forming unit and the sewing unit to a set temperature; and the supporting unit is used for installing and supporting the forming unit, the heating unit and the stitching unit. The invention is based on the pipe making method of the PEEK strip continuous gradual change bending-sewing pipe making device, and can realize continuous molding of PEEK pipes and effectively control energy consumption and heat input of a molding ring.

Description

PEEK strip continuous gradual change bending-stitching pipe making device and method

Technical Field

The invention relates to the technical field of plastic molding, in particular to a PEEK strip continuous gradual change bending-sewing pipe making device and method.

Background

The existing space station and large truss structure are oversized, and are generally carried by heavy carrier rockets and assembled on-orbit, but the ground launching mode limits the space construction speed in terms of difficulty, efficiency and cost. Therefore, the on-orbit manufacturing with high production efficiency, low cost and quick application becomes the development trend of space station for space engineering construction. The current spacecraft and truss structure materials are mainly metal and resin-based materials, and the metal has the advantages of high strength, small linear expansion coefficient and the like, but the density is larger than that of the resin-based materials, and the resin-based materials can be used as the material of the spacecraft truss structure preferably.

Polyether-ether-ketone (PEEK) is a high-performance thermoplastic plastic, has excellent thermal performance, high wear resistance, chemical resistance and wide processability, and meets the preparation and service requirements of a large truss in space environment, and the preparation of PEEK rod pieces/pipe fittings which are basic materials of the large truss is a key technical link. The existing PEEK pipe is mainly prepared through traditional processes such as extrusion and injection molding, and is required to be molded in a PEEK plastic molten state, and after molding, integral cooling and shaping are required, so that heat consumption is high, and molding period is long. Considering the specificity of space environment, the PEEK pipe fitting prepared by the traditional process is liable to cause a plurality of problems of difficult heat management, difficult complete melting and cooling of plastics and the like.

Disclosure of Invention

The invention aims to provide a continuous gradual change bending-sewing pipe making device and method for PEEK strips, which are used for solving the problems in the prior art, realizing continuous gradual change bending forming of PEEK pipes and local small-area melting sewing pipe making at a lower temperature, and effectively controlling energy consumption and heat input of a forming ring.

In order to achieve the above object, the present invention provides the following solutions:

the invention provides a PEEK strip continuous gradual change bending-sewing pipe making device, which comprises a forming unit, a pipe forming unit and a pipe forming unit, wherein the forming unit is used for converting a strip into a pipe; the sewing unit is used for fusion bonding of the contact joint of the pipe; the heating unit is used for heating the forming unit and the sewing unit to a set temperature; the supporting unit is used for installing and supporting the forming unit, the heating unit and the sewing unit; the PEEK strip continuous gradual change bending-sewing pipe making device and method are developed by utilizing the PEEK glassy material continuous conveying capability, the low-temperature high-elastic continuous gradual change bending deformation capability and the local small-area melting sewing capability, and have important significance for the preparation of a large truss basic unit, the improvement of production efficiency, the energy conservation, the thermal management and the like.

Optionally, the supporting unit comprises two symmetrically arranged brackets, each bracket comprises an upper bracket and a lower bracket which are fixedly connected, the bottom of the upper bracket and the top of the lower bracket are provided with concave arc-shaped mounting tables, the two arc-shaped mounting tables of the same bracket form a mounting hole, two ends of the forming unit are respectively arranged in the mounting holes of the two brackets, the bottom of the concave arc-shaped mounting table of the lower bracket is provided with a plane for preventing rotation of the forming unit, and the contact part of the forming unit and the mounting hole of the bracket is provided with a plane matched with the forming unit; the upper bracket and the lower bracket have a gap of 1mm in the working state for the bolts to compress, and the upper bracket is provided with a through hole for inserting a temperature thermocouple into the die main body for temperature control.

Optionally, the molding unit comprises a mold main body, wherein the mold main body comprises a front upper mold, a front lower mold, a rear left outer mold, a rear right outer mold and a mold core, and the front upper mold is fixedly connected with the front lower mold, the rear left outer mold and the rear right outer mold through connecting bolts and positioned by positioning pins; the mold core is fixedly connected and positioned between the rear left outer mold and the rear right outer mold through a connecting bolt, one end of the mold core is tightly attached to the tail end of the front upper mold to jointly limit the deformation of the upper side of the belt material, the front lower mold is tightly attached to the rear left outer mold and the rear right outer mold to jointly limit the deformation of the lower side of the belt material, and the other end of the mold core is arranged in the sewing unit in a penetrating manner; round bulges are arranged at the rear sides of the rear left outer die and the rear right outer die and are used for positioning the seaming die; the bottom of the front upper die is provided with a gradual change upper molding surface, the top of the front lower die is provided with a lower molding surface matched with the upper molding surface, the front upper die and the front lower die are used for jointly realizing bending and transformation of the strip, one side of the rear left outer die is provided with a gradual change left outer molding surface, the left outer die, the right outer die and the core can form a bent strip into a tube.

Optionally, the heating unit includes two groups of heating rings and one group of heating rods, which can perform gradient heating on the forming unit and heat the sewing unit, and the two groups of heating rings are respectively arranged at the periphery of the forming unit; the heating rod is arranged at the sewing unit; the temperature measuring holes are formed in the tops of the forming unit and the sewing unit, the temperature measuring thermocouples connected with the temperature control device are inserted into the temperature measuring holes, the temperature of the main body is measured in real time through the temperature measuring thermocouples, meanwhile, the temperature control device can adjust the working state of the heating device according to the difference between the set target temperature and the actual temperature, the heating device arranged on the main body can regulate and control the temperature of the die to be 180-230 ℃ to ensure that the temperature is in a lower temperature range of PEEK high-elasticity state, and the temperature on the die main body is in a gradually rising distribution state from front to back, so that the deformation capability of the high-elasticity state strip material can be ensured, the conveying capability of the high-elasticity state strip material in the forming unit from front to back can be ensured, and energy sources can be effectively saved when the forming target is completed; the heating device arranged on the sewing unit can heat the local small area to the temperature required by pipe sewing, and the sewing temperature can be selected in the range of 330-350 ℃ to realize the pipe sewing.

Optionally, stitch up the unit and include stitch up the bush, stitch up the bush front end and be circle boss form, and can carry out clearance fit location with the circle boss of back left external mold, back right external mold, realize connecting through the bolt, be equipped with the heating rod hole on the bush, the heating rod hole sets up and carries out local melting bonding to the contact seam department of the pipe of strip to the band material above the tubular sewing region, through heat radiation structure's parameterization design, design the bush outside into unique heat radiation structure, realize sewing up regional circumference local small region high temperature district, the distribution in other low temperature district, guarantee the rigidity of tubular after the shaping, temperature control device connects the heating rod is inserted and is located in the heating rod hole.

Optionally, the device further comprises an introduction unit, wherein the introduction unit is positioned at the front end of the forming unit, the introduction unit comprises an introduction male die and an introduction female die which are arranged up and down, and the introduction female die and the introduction male die are positioned through a spigot and connected through a bolt; the guiding female die is provided with a stepped hole for connecting the guiding female die with a lower bracket positioned at the front end of the forming unit by a bolt; the strip speed measuring units are arranged in the leading-in male die and the leading-in female die, can monitor the speed of the strip when the strip is fed, and are used for matching with the sewing quality of the follow-up sewing unit when the pipe is sewn.

Optionally, the end of the stitching unit is provided with a shaping unit. The shaping unit is used for finishing the external dimension of the pipe and ensuring the straightness of the pipe. The outlet of the shaping unit is provided with a plurality of groups of laser probes, which can be used for measuring and monitoring the straightness of the shaped pipe.

Optionally, the tail end of the shaping unit is provided with a traction unit, the traction unit comprises two soft rollers which are matched up and down, the two soft rollers are provided with concave arc-shaped area grooves, and the two arc-shaped area grooves are arranged symmetrically up and down; the soft rollers located below are consistent with the pipe production position, the soft rollers located above can be adjusted to be at the upper and lower positions through the L-shaped plate device, the two soft rollers can keep synchronous relative rotation, a closed toothed belt is arranged on one side of the traction unit, one end of the toothed belt is fixedly connected with toothed belt wheels arranged at one ends of the soft rollers above and below respectively, the other end of the toothed belt is connected with a tensioning wheel, and toothed belt wheels are arranged at the other ends of the soft rollers below and connected with toothed belt wheels below the feeding unit through the toothed belt.

Optionally, the front end of the introducing unit is provided with a feeding unit, the feeding unit comprises four feeding rollers which are vertically and symmetrically arranged, four tensioning rollers are vertically and symmetrically arranged in the middle of the feeding rollers, two ends of the lower feeding roller and the tensioning rollers are movably arranged on two symmetrical feeding bases, two ends of the upper feeding roller and the tensioning rollers are movably arranged on L-shaped plates on two sides of the feeding base, the two feeding rollers on the upper side are in transmission connection through a closed toothed belt, the two feeding rollers on the lower side are in transmission connection through another closed toothed belt, and the feeding rollers which are vertically arranged are in transmission by adopting a pair of meshing gears; the two sides of the feeding roller positioned below are provided with limit parts with round bulge structures, the feeding roller positioned below is positioned on the same horizontal line, and the feeding roller positioned above can adjust the upper and lower positions through the L-shaped plate device.

Optionally, the front end of the feeding unit is provided with an uncoiling unit, the uncoiling unit comprises an uncoiling base, a strip-shaped chute is formed in the top of the uncoiling base, a support frame and an uncoiling wheel are arranged on the chute in a sliding manner, and a guide pillar is arranged between the support frame and the uncoiling wheel; three guide posts are designed, one ends of the two guide posts positioned at the left and the right are fixed on the support frame through bolts, one ends of the two guide posts positioned at the left and the right, far away from the support frame, are provided with compression plates in a sliding manner, one ends of the guide posts positioned in the middle are fixed on the compression plates, the other ends of the guide posts positioned in the middle movably penetrate through the support frame, springs are sleeved on the guide posts positioned in the middle, two ends of each spring are respectively abutted with the support frame and the compression plates, and the front ends of the compression plates are provided with compression blocks; protrusions are arranged on two sides of the uncoiling wheel, gaps larger than the width of the protrusions of the uncoiling wheel are formed on two sides of the pressing block and the pressing plate, the length of the pressing block is smaller than the inner concave part in the middle of the uncoiling wheel, and the thickness of the pressing block is larger than the height of the protrusions of the uncoiling wheel; the uncoiling wheel is provided with a pressing sheet, and the innermost end of the coiled strip can be clamped on the uncoiling wheel.

The invention also provides a PEEK strip continuous gradual change bending-sewing pipe making method, which comprises the following steps:

s1, a molding preparation stage: installing and debugging the whole device to finish preheating of the die; preparing a PEEK strip with a proper width, and removing impurities on the surface of the strip;

s2, forming: feeding the strip into an introducing unit to finish receiving preparation of the strip, and starting a strip tube forming process; bending and deforming the strip at the front end by a straight strip, and gradually rolling the strip into a required pipe shape after entering the rear end;

s3, stitching: after the pipe is finished in the forming stage, the two side edges of the strip are butted, and the strip is fed into a sewing unit to realize sewing of the pipe.

Compared with the prior art, the invention has the following technical effects:

1. the invention has high integration level, effectively reduces the volume of the whole machine, and meets the requirements of miniaturization and light weight of equipment required in space launching and in-orbit manufacturing.

2. The forming temperature is set in a gradient mode in the strip feeding process, the temperature of the die main body is guaranteed to be in the range of 180-230 ℃, necessary temperature and enough deformability required by forming a pipe can be provided, the forming force of the strip which is continuously increased in the gradual deformation process is reduced, meanwhile, compared with the lower energy required by extrusion forming, the heat loss can be effectively controlled, the production cost is reduced, and the concept of space thermal management is attached.

3. The strip is in the high-elastic state in the forming process, the temperature is set to be gradually increased, the feedback force increased due to deformation of the strip can be effectively reduced, certain rigidity is still achieved after the strip is sewn in a local small area of a sewing unit, a cooling device is not needed, the problem that the pipe does not have enough rigidity and needs to be specially cooled after the traditional forming process is avoided, the pipe output speed is faster than that of the traditional process, and the production efficiency is high.

4. The method has the advantages that the pipe molding precision, the quality and the like are used as indexes, the molding die structure is optimally designed, a quadratic curve is selected as a final molding bottom line, the unnecessary deformation resistance caused on the structural layer of the die is effectively reduced, the molding process is performed in a closed die cavity, and the precision of continuous gradual bending-sewing pipe production of the strip can be effectively controlled.

5. Creatively provides a molding process method of the PEEK strip direct continuous gradual change bending-sewing pipe, avoids the common characteristic that the traditional plastic pipe needs to heat raw materials to a molten state, and saves energy sources; and because the high-elastic state is molded at a lower temperature and the local small area is fused and sewed, the molded plastic has certain rigidity and reduces extra cooling links.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of a PEEK strip continuous gradual bending-sewing pipe making device of the invention;

FIG. 2 is a schematic diagram of the uncoiling unit structure of the invention;

FIG. 3 is a schematic diagram of a feed unit according to the present invention;

FIG. 4 is a schematic view of the structure of the introducing unit and the supporting unit according to the present invention;

FIG. 5 is a schematic view of a molding unit structure according to the present invention;

FIG. 6 is a schematic view of the structure of the sewing unit of the present invention;

FIG. 7 is a schematic view of the front upper die structure of the present invention;

FIG. 8 is a schematic view of the front lower die structure of the present invention;

FIG. 9 is a schematic view of the rear left outer mold structure of the present invention;

FIG. 10 is a schematic view of a mandrel structure according to the present invention;

FIG. 11 is a schematic diagram of a mold cavity structure of the present invention;

FIG. 12 is a schematic view of the traction unit of the present invention;

FIG. 13 is a schematic diagram showing a variation of a process for manufacturing a strip pipe according to an embodiment of the present invention;

FIG. 14 is a schematic diagram showing a variation of a process for manufacturing a strip pipe according to a second embodiment of the present invention;

FIG. 15 is a schematic diagram showing a variation of a process for manufacturing a strip pipe according to a third embodiment of the present invention;

reference numerals illustrate: 1-mounting platform, 2-unwinding unit, 201-unwinding base, 202-support frame, 203-unwinding wheel, 204-guide pillar, 205-compacting plate, 206-spring, 207-compacting block, 208-tabletting, 3-feeding unit, 301-feeding roller, 302-tensioning roller, 303-feeding base, 4-introducing unit, 401-introducing male die, 402-introducing female die, 5-support unit, 501-upper support, 502-lower support, 6-forming unit, 601-front upper die, 6011-upper forming surface, 602-front lower die, 6021-lower forming surface, 603-rear left outer die, 6031-left outer die surface, 604-core, 6041-inner die surface, 7-stitching unit, 701-stitching die, 8-shaping unit, 9-traction unit, 901-soft roll.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention aims to provide a PEEK strip continuous gradual change bending-sewing pipe making device and a PEEK strip continuous gradual change bending-sewing pipe making method, so that the problems existing in the prior art are solved, continuous gradual change forming of PEEK pipes can be realized, and consumption of energy sources and heat input of forming rings can be effectively controlled.

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.

Referring to fig. 1 to 12, the invention provides a continuous gradual change bending-sewing pipe making device for a PEEK strip, which comprises an uncoiling unit 2, a feeding unit 3, an introducing unit 4 and a supporting unit 5 which are sequentially arranged on a mounting platform 1, wherein a forming unit 6 and a sewing unit 7 are arranged on the supporting unit 5, and the forming unit 6 is used for converting the strip into a pipe; the stitching unit 7 is used for fusing and bonding the contact joint of the pipe; the forming unit 6 and the stitching unit 7 are provided with heating units for heating the forming unit 6 and the stitching unit 7 to a set temperature.

Specifically, the uncoiling unit 2 comprises an uncoiling base 201, a strip-shaped chute is formed in the top of the uncoiling base 201, a support frame 202 and an uncoiling wheel 203 are arranged on the chute in a sliding manner, and a guide pillar 204 is arranged between the support frame 202 and the uncoiling wheel 203; three guide posts 204 are designed, one end of each of the two guide posts 204 positioned at the left and the right is fixed on the support frame 202 through bolts, one end, far away from the support frame 202, of each of the two guide posts 204 positioned at the left and the right is provided with a compression plate 205 in a sliding manner, one end of each of the guide posts positioned in the middle is fixed on the compression plate 205, the other end of each of the guide posts positioned in the middle is movably arranged on the support frame 202 in a penetrating manner, a spring 206 is sleeved on each of the guide posts positioned in the middle, two ends of the spring 206 are respectively abutted with the support frame 202 and the compression plate 205, and the front end of each of the compression plates 205 is provided with a compression block 207; protrusions are designed on two sides of the uncoiling wheel 203, gaps larger than the width of the protrusions of the uncoiling wheel are formed on two sides of the pressing block 207 and the pressing plate 205, the length of the pressing block 207 is smaller than the inner concave part in the middle of the uncoiling wheel, and the thickness of the pressing block 207 is larger than the height of the protrusions of the uncoiling wheel; the unwind reel has a press 208 disposed thereon that is capable of clamping the innermost end of the coil onto the unwind reel. The feeding unit 3 comprises four feeding rollers 301 which are vertically symmetrically arranged, four tensioning rollers 302 are vertically symmetrically arranged in the middle of the feeding rollers 301, two ends of the lower feeding rollers 301 and the tensioning rollers 302 are movably arranged on two symmetrical feeding bases 303, two ends of the upper feeding rollers 301 and the tensioning rollers 302 are movably arranged on L-shaped plates on two sides of the feeding bases 303, the two feeding rollers 301 positioned above are in transmission connection through a closed toothed belt, the two feeding rollers 301 positioned below are in transmission connection through another closed toothed belt, and the feeding rollers arranged above and below are in transmission through a pair of meshing gears; the limit parts of the circular protruding structures are arranged at the two side edges of the lower feeding roller 301, the lower feeding roller 301 is positioned on the same horizontal line, the upper feeding roller 301 and the tensioning roller 302 can adjust the upper and lower positions through an L-shaped plate device, the tensioning roller 302 ensures that toothed belts arranged up and down can fully play a role in compacting PEEK strips, the upper feeding roller 301 and the tensioning roller 302 are arranged on the L-shaped plate, the L-shaped plate can be adjusted up and down, the locking fastening can be carried out through bolt gaskets, the horizontal positions of the L-shaped plate are kept synchronous through positioning pins arranged below and guide blocks arranged left and right, and the high and low positions are adjusted through studs arranged below; the feeding device is provided with a transmission toothed belt wheel connected with the traction device, the transmission connection between the feeding device and the traction device is driven by a toothed belt arranged between the feeding device and the traction device, and the speed matching is controlled by the gear ratio of the toothed belt wheel arranged on the feeding device; the leading-in unit 4 is positioned at the front end of the forming unit 6, and the leading-in unit 4 comprises a leading-in male die 401 and a leading-in female die 402 which are arranged up and down, and the leading-in female die 402 and the leading-in male die 401 are positioned through a spigot and connected through a bolt; the leading-in female die is provided with a stepped hole for connecting the leading-in female die with a lower bracket positioned at the front end of the forming unit by a bolt; the strip speed measuring units are arranged in the leading-in male die 401 and the leading-in female die 402, can monitor the speed of the strip when the strip is fed, and are used for matching with the sewing quality of the follow-up sewing unit when the pipe is sewn.

The support unit 5 comprises two symmetrically arranged brackets, each bracket comprises an upper bracket 501 and a lower bracket 502 which are fixedly connected, the bottom of the upper bracket 501 and the top of the lower bracket 502 are provided with concave arc-shaped mounting tables, the two arc-shaped mounting tables of the same bracket form a mounting hole, two ends of the forming unit are respectively arranged in the mounting holes of the two brackets, the bottom of the concave arc-shaped mounting table of the lower bracket 502 is provided with a plane for stopping rotation of the forming unit, and the contact part of the forming unit and the mounting hole of the bracket is provided with a plane matched with the forming unit; the upper bracket 501 and the lower bracket 502 have a gap of 1mm in the working state for the bolts to compress, and a through hole is formed in the upper bracket 501, so that a temperature thermocouple can be inserted into the die main body for temperature control. The forming unit 6 comprises a die body, wherein the die body comprises a front upper die 601, a front lower die 602, a rear left outer die 603, a rear right outer die and a core 604, and the front upper die 601 is fixedly connected with the front lower die 602, the rear left outer die 603 and the rear right outer die through connecting bolts and positioned by positioning pins; the core 604 is fixedly connected and positioned between the rear left outer die and the rear right outer die through connecting bolts, one end of the core 604 is tightly attached to the tail end of the front upper die 601 to jointly limit the deformation of the upper side of the strip, the front lower die is tightly attached to the rear left outer die and the rear right outer die to jointly limit the deformation of the lower side of the strip, and the other end of the core 604 is arranged in the sewing unit in a penetrating manner; round bulges are arranged at the rear sides of the rear left outer die and the rear right outer die and are used for positioning the seaming die; the bottom of the front upper die 601 is provided with a gradual upper molding surface 6011, the top of the front lower die 602 is provided with a lower molding surface 6021 matched with the upper molding surface 6011, the front upper die and the front lower die jointly realize the transition of a strip from one shape to a U shape, the deformation degree is more gentle, the temperature is heated to 180-210 ℃ by a heating unit, one side of the rear left outer die 603 is provided with a gradual left outer cavity surface 6031, one side of the rear right outer die is provided with a right outer cavity surface opposite to the left outer cavity surface, the outer wall of the core 604 is provided with a gradual inner cavity surface 6041, the rear left outer die, the rear right outer die and the core can form a tube for the bent strip, the rear left outer die, the rear right outer die and the core realize the transition of the U shape to the O shape, the deformation degree of the strip is more severe, the strip is fed to generate larger force, the temperature is heated to 210-230 ℃ by the heating unit, the temperature is slightly increased to reduce the feeding force, the pipe defects generated due to the larger feeding force are prevented, and the temperature range of 210-230 ℃ is in a lower temperature range of PEEK high-elasticity state.

The heating unit comprises two groups of heating rings and one group of heating rods, and can perform gradient heating on the forming unit and heat the sewing unit, and the two groups of heating rings are respectively arranged on the periphery of the forming unit; the heating rod is arranged at the sewing unit; the temperature measuring holes are formed in the tops of the forming unit and the sewing unit, the temperature measuring thermocouples connected with the temperature control device are inserted into the temperature measuring holes, the temperature of the main body is measured in real time through the temperature measuring thermocouples, meanwhile, the temperature control device can adjust the working state of the heating device according to the difference between the set target temperature and the actual temperature, the heating device arranged on the main body can regulate and control the temperature of the die to be 180-230 ℃, the temperature in a lower temperature range of the PEEK in a high-elastic state is guaranteed, and the temperature on the die main body is in a gradually rising distribution state from front to back, so that the deformation capability of the high-elastic state strip is guaranteed, the conveying capability of the high-elastic state strip in the forming unit from front to back is guaranteed, and energy is effectively saved when the forming target is completed; the heating device arranged on the sewing unit can heat the local small area to the temperature required by pipe sewing, and the sewing temperature can be selected in the range of 330-350 ℃ to realize the pipe sewing.

The sewing unit 7 comprises a sewing mouth die 701, the front end of the sewing mouth die 701 is in a shape of a circular boss, the sewing mouth die can be in clearance fit with the circular boss of the rear left outer die and the rear right outer die, connection is achieved through bolts, a heating rod hole is formed in the sewing mouth die, the heating rod hole is arranged above a pipe sewing region to locally heat a contact seam of a pipe of a strip material, so that the contact seam is locally fused and bonded, the outer side of the sewing mouth die is designed into a unique heat dissipation structure through parameterization of a heat dissipation structure, the distribution of a local small-area high-temperature area in the circumferential direction of the sewing region is achieved, the rigidity of the pipe material after molding is guaranteed, and a heating rod is inserted into the heating rod hole.

The tail end of the sewing unit 7 is provided with a shaping unit 8, and the shaping unit 8 is used for finishing the external dimension of the pipe, so that the straightness of the pipe is ensured. A plurality of groups of laser probes are designed at the outlet of the shaping unit 8 and can be used for measuring and monitoring the straightness of the shaped pipe.

Further preferably, the tail end of the shaping unit 8 is provided with a traction unit 9, the traction unit 9 comprises two soft rollers 901 which are matched up and down, the two soft rollers 901 are provided with concave arc-shaped area grooves, and the two arc-shaped area grooves are arranged up and down symmetrically; the soft roller 901 that is located the below is unanimous with tubular product output position, and the soft roller that is located the top can be through the position about the L shaped plate device is adjusted, and two soft rollers can keep synchronous relative rotation, and traction unit one side is equipped with closed toothed belt, and toothed belt one end is connected with the fixed profile of tooth band pulley transmission that sets up of soft roller one end of top and below respectively, and the toothed belt other end is connected with the take-up pulley, and the other end of soft roller of below sets up the profile of tooth band pulley, and the profile of tooth band pulley passes through the toothed belt and is connected with the profile of tooth band pulley of feeding unit below.

Example 1

Referring to fig. 13, the embodiment provides a PEEK strip continuous gradual bending-sewing pipe making method based on the device, which comprises the following steps:

s1, a molding preparation stage: installing and debugging a whole continuous gradual change bending-sewing pipe making device of the strip, comprising preheating a forming device, starting two heating rings to heat a die main body to 180-230 ℃ in gradient distribution, starting a heating rod in a sewing mouth die to enable the part of the sewing mouth die to reach a certain constant temperature between 330-350 ℃ for sewing pipes, and finishing preheating of the die; preparing a PEEK strip with a proper width, and removing impurities on the surface of the strip;

s2, forming: the strip is fed into the leading-in device to complete the preparation for receiving the strip, and the strip tube forming process is started. Specifically, the strip is deformed into a U shape from a straight strip at the front end, then enters the rear end and is gradually rolled into a round shape, and the feeding speed is reasonably controlled according to the thickness of the strip, the temperature difference between the front and the rear of the forming device, the temperature of the sewing unit and the like; in the forming stage, the coil pipe forming of the strip in one direction is realized through reasonable design of the forming unit.

The feed rate can be reasonably selected and matched based on the thermal conductivity of the PEEK strip and the die body.

S3, stitching: after the pipe is finished in the forming stage, the two side edges of the strip are butted, and the strip is fed into a stitching area to stitch the pipe. As shown in fig. 5, the stitching unit 7 is provided with a heating rod hole for the heating unit to heat above the pipe molding, and the heating rod supplies heat for stitching the strip material, so that two sides of the strip material are bonded together; in particular, the stitching temperature here should be matched to the feed speed of the strip.

Example two

Referring to fig. 14, this embodiment is further modified on the basis of the above, and provides a method for producing square pipes of the same (or different) materials, that is, a continuous gradual bending-stitching pipe making device for strips of square pipes, according to the design method of the present invention, a flat strip is continuously gradually changed into a square pipe, that is, the front end of the strip forming device is divided into an upper die and a lower die for limiting, the rear end is divided into a left outer die, a right outer die and a core, a concave shape is gradually rolled into a square shape, and the square pipe is stitched and formed in a subsequent stitching step, so as to produce a square pipe.

The forming method mainly comprises the following steps:

s1, a molding preparation stage: installing and debugging a whole continuous gradual change bending-sewing pipe making device of the strip, comprising preheating a forming device, starting a heating device on the forming device to perform gradient heating on a die main body, and starting a local heating device of a sewing area for sewing pipes to finish preheating of the die; preparing a strip with proper width, and removing impurities on the surface of the strip;

s2, forming: the strip is fed into the leading-in device to complete the preparation for receiving the strip, and the strip is started to be subjected to the strip tube forming process at a certain speed. Specifically, the strip is deformed from a straight strip to be concave at the front end, then enters the rear end and is gradually rolled to be square, and the feeding speed is reasonably controlled according to the thickness of the strip, the temperature difference between the front and the rear of the forming device, the temperature of the sewing unit and the like; in the forming stage, the coil pipe forming of the strip in one direction is realized through reasonable design of the forming unit.

The feed rate may be reasonably selected and matched based on the material of the strip and the thermal conductivity of the die body.

S3, stitching: after the pipe ends the forming stage, namely the two side edges of the strip are butted, the strip is fed into a stitching area to stitch the pipe at the moment; in particular, the stitching temperature here should be matched to the feed speed of the strip.

Example III

Referring to fig. 15, this embodiment provides a method for producing triangular pipes of the same (or different) materials, that is, a continuous gradual change bending-stitching pipe making device for strips of triangular pipes, according to the design method of the present invention, a flat strip is continuously gradually changed into triangular pipes, that is, the front end of a strip forming device is divided into upper and lower dies for limiting, the rear end is divided into left and right outer dies and a core, the V-shape is gradually rolled into a triangle, and the triangle is stitched and formed in a subsequent stitching step, so as to produce triangular pipes.

The forming method mainly comprises the following steps:

s1, a molding preparation stage: installing and debugging a whole continuous gradual change bending-sewing pipe making device of the strip, comprising preheating a forming device, starting a heating device on the forming device to perform gradient heating on a die main body, and starting a local heating device of a sewing area for sewing pipes to finish preheating of the die; preparing a strip with proper width, and removing impurities on the surface of the strip;

s2, forming: the strip is fed into the leading-in device to complete the preparation for receiving the strip, and the strip is started to be subjected to the strip tube forming process at a certain speed. Specifically, the strip is deformed into a V shape from a straight strip at the front end, then enters the rear end and is gradually rolled into a triangle, and the feeding speed is reasonably controlled according to the thickness of the strip, the temperature difference between the front and the rear of the forming device, the temperature of the sewing unit and the like; in the forming stage, the coil pipe forming of the strip in one direction is realized through reasonable design of the forming unit.

The feed rate may be reasonably selected and matched based on the material of the strip and the thermal conductivity of the die body.

S3, stitching: after the pipe ends the forming stage, namely the two side edges of the strip are butted, the strip is fed into a stitching area to stitch the pipe at the moment; in particular, the stitching temperature here should be matched to the feed speed of the strip.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.

Claims (11)

1. A PEEK strip continuous gradual change bending-sewing tubulation device, characterized in that: comprises a forming unit for converting the strip into a tube; the sewing unit is used for fusion bonding of the contact joint of the pipe; the heating unit is used for heating the forming unit and the sewing unit to a set temperature; and the supporting unit is used for installing and supporting the forming unit, the heating unit and the stitching unit.

2. The PEEK strip continuous gradient bend-stitch tubing set as set forth in claim 1, wherein: the support unit comprises two symmetrically arranged brackets, each bracket comprises an upper bracket and a lower bracket which are fixedly connected, the bottoms of the upper bracket and the tops of the lower bracket are provided with concave arc-shaped mounting tables, the two arc-shaped mounting tables of the same bracket are formed into a mounting hole, and two ends of the forming unit are respectively arranged in the mounting holes of the two brackets.

3. The PEEK strip continuous gradient bend-stitch tubing set as set forth in claim 2, wherein: the forming unit comprises a die main body, wherein the die main body comprises a front upper die, a front lower die, a rear left outer die, a rear right outer die and a core, and the front upper die is fixedly connected with the front lower die, the rear left outer die and the rear right outer die through connecting bolts and positioned by positioning pins; the mold core is fixedly connected and positioned between the rear left outer mold and the rear right outer mold through a connecting bolt, one end of the mold core is tightly attached to the tail end of the front upper mold to jointly limit the deformation of the upper side of the belt material, the front lower mold is tightly attached to the rear left outer mold and the rear right outer mold to jointly limit the deformation of the lower side of the belt material, and the other end of the mold core is arranged in the sewing unit in a penetrating manner; round bulges are arranged at the rear sides of the rear left outer die and the rear right outer die and are used for positioning the seaming die; the bottom of the front upper die is provided with a gradual change upper molding surface, the top of the front lower die is provided with a lower molding surface matched with the upper molding surface, the front upper die and the front lower die are used for jointly realizing bending and transformation of the strip, one side of the rear left outer die is provided with a gradual change left outer molding surface, the left outer die, the right outer die and the core can form a bent strip into a tube.

4. The PEEK strip continuous gradient bend-stitch tubing set as set forth in claim 1, wherein: the heating unit comprises two groups of heating rings and one group of heating rods, and the two groups of heating rings are respectively arranged on the periphery of the forming unit; the heating rod is arranged at the sewing unit; temperature measuring holes are formed in the tops of the forming unit and the sewing unit, and temperature measuring thermocouples connected with the temperature control device are inserted into the temperature measuring holes.

5. The PEEK strip continuous gradient bend-stitch tubing set as set forth in claim 4, wherein: the sewing unit comprises a sewing mouth die, the front end of the sewing mouth die is in a circular boss shape, and can be in clearance fit positioning with the circular bosses of the rear left outer die and the rear right outer die, connection is achieved through bolts, a heating rod hole is formed in the sewing mouth die, the heating rod hole is arranged at a position above a pipe sewing region, and the heating rod connected with the temperature control device is inserted into the heating rod hole.

6. The PEEK strip continuous gradient bend-stitch tubing set as set forth in claim 1, wherein: the guide unit is positioned at the front end of the forming unit and comprises a guide male die and a guide female die which are arranged up and down, and the guide female die and the guide male die are positioned through a spigot and connected through a bolt; the guiding female die is provided with a stepped hole for connecting the guiding female die with a lower bracket positioned at the front end of the forming unit by a bolt; the strip speed measuring units are arranged in the leading-in male die and the leading-in female die, can monitor the speed of the strip when the strip is fed, and are used for matching with the sewing quality of the follow-up sewing unit when the pipe is sewn.

7. The PEEK strip continuous gradient bend-stitch tubing set as set forth in claim 1, wherein: the tail end of the stitching unit is provided with a shaping unit, and a plurality of groups of laser probes are arranged at the outlet of the shaping unit.

8. The PEEK strip continuous gradient bend-stitch tubing set as set forth in claim 7, wherein: the tail end of the shaping unit is provided with a traction unit, the traction unit comprises two soft rollers which are matched up and down, the two soft rollers are provided with concave arc-shaped area grooves, and the two arc-shaped area grooves are symmetrically arranged up and down; the soft rollers located below are consistent with the pipe production position, the soft rollers located above can be adjusted to be at the upper and lower positions through the L-shaped plate device, the two soft rollers can keep synchronous relative rotation, a closed toothed belt is arranged on one side of the traction unit, one end of the toothed belt is fixedly connected with toothed belt wheels arranged at one ends of the soft rollers above and below respectively, the other end of the toothed belt is connected with two tensioning wheels, toothed belt wheels are arranged at the other ends of the soft rollers located below, and the toothed belt wheels are connected with toothed belt wheels below the feeding unit through the toothed belt.

9. The PEEK strip continuous gradient bend-stitch tubing set as set forth in claim 6, wherein: the front end of the leading-in unit is provided with a feeding unit, the feeding unit comprises four feeding rollers which are symmetrically arranged up and down, two ends of the lower feeding roller and the tensioning roller are movably arranged on two symmetrical feeding bases, two ends of the upper feeding roller and the tensioning roller are movably arranged on L-shaped plates on two sides of the feeding base, the two feeding rollers positioned above are in transmission connection through a closed toothed belt, the two feeding rollers positioned below are in transmission connection through another closed toothed belt, and the feeding rollers arranged up and down are in transmission through a pair of meshing gears; the two sides of the feeding roller positioned below are provided with limit parts with round bulge structures, the feeding roller positioned below is positioned on the same horizontal line, and the feeding roller positioned above can adjust the upper and lower positions through the L-shaped plate device.

10. The PEEK strip continuous gradient bend-stitch tubing set as set forth in claim 9, wherein: the front end of the feeding unit is provided with an uncoiling unit, the uncoiling unit comprises an uncoiling base, the top of the uncoiling base is provided with a strip-shaped chute, a support frame and an uncoiling wheel are arranged on the chute in a sliding manner, and a guide pillar is arranged between the support frame and the uncoiling wheel; three guide posts are designed, one ends of the two guide posts positioned at the left and the right are fixed on the support frame through bolts, one ends of the two guide posts positioned at the left and the right, far away from the support frame, are provided with compression plates in a sliding manner, one ends of the guide posts positioned in the middle are fixed on the compression plates, the other ends of the guide posts positioned in the middle movably penetrate through the support frame, springs are sleeved on the guide posts positioned in the middle, two ends of each spring are respectively abutted with the support frame and the compression plates, and the front ends of the compression plates are provided with compression blocks; protrusions are arranged on two sides of the uncoiling wheel, gaps larger than the width of the protrusions of the uncoiling wheel are formed on two sides of the pressing block and the pressing plate, the length of the pressing block is smaller than the inner concave part in the middle of the uncoiling wheel, and the thickness of the pressing block is larger than the height of the protrusions of the uncoiling wheel; the uncoiling wheel is provided with a pressing sheet, and the innermost end of the coiled strip can be clamped on the uncoiling wheel.

11. A method for continuously and gradually bending and sewing a PEEK strip, which is characterized in that: the method comprises the following steps:

s1, a molding preparation stage: installing and debugging the whole device to finish preheating of the die; preparing a PEEK strip with a proper width, and removing impurities on the surface of the strip;

s2, forming: feeding the strip into an introducing unit to finish receiving preparation of the strip, and starting a strip tube forming process; bending and deforming the strip at the front end by a straight strip, and gradually rolling the strip into a required pipe shape after entering the rear end;

s3, stitching: after the pipe is finished in the forming stage, the two side edges of the strip are butted, and the strip is fed into a sewing unit to realize sewing of the pipe.

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