CN111550633B - Polyether-ether-ketone pipe joint and welding method thereof - Google Patents

Polyether-ether-ketone pipe joint and welding method thereof Download PDF

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Publication number
CN111550633B
CN111550633B CN202010392661.9A CN202010392661A CN111550633B CN 111550633 B CN111550633 B CN 111550633B CN 202010392661 A CN202010392661 A CN 202010392661A CN 111550633 B CN111550633 B CN 111550633B
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polyether
ether
ketone
pipe
joint
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CN111550633A (en
Inventor
陈奇海
霍绍新
方良超
殷东平
瞿启云
姚芮
李磊
许春停
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CETC 38 Research Institute
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CETC 38 Research Institute
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends

Abstract

The invention discloses a polyether-ether-ketone pipe joint, which relates to the technical field of pipe joints and comprises a joint body, wherein openings are formed in two ends of the joint body, an annular groove and a limiting piece are arranged in the inner wall of the joint body, and the annular groove is positioned between the limiting piece and the end part of the joint body. The invention also provides a welding method of the polyether-ether-ketone pipe joint. The invention has the beneficial effects that: the polyether-ether-ketone pipe joint can be matched with a polyether-ether-ketone pipe, so that subsequent welding is facilitated, the polyether-ether-ketone pipe joint is large in welding area, high in welding seam connection strength, good in sealing performance, attractive in appearance of a welding seam, free of accumulation of excessive glue materials, and the feeding depth of a polyether-ether-ketone straight pipe is controlled through the limiting piece in the welding process.

Description

Polyether-ether-ketone pipe joint and welding method thereof
Technical Field
The invention relates to the technical field of pipe joints, in particular to a polyether-ether-ketone pipe joint and a welding method thereof.
Background
PEEK is a typical special engineering plastic and has high mechanical strength, excellent impact resistance, fatigue resistance and the like. Compared with the traditional aluminum alloy, the PEEK material shows strong application potential in the aspects of design freedom, manufacturing convenience, light weight, high strength and the like, and is one of the engineering plastics with the optimal comprehensive performance which are acknowledged in the world. PEEK molded pipelines have been widely used in various fields such as aviation, automobiles, paint delivery and the like. In order to realize the welding of the plastic pipeline, various methods such as a hot plate, ultrasound, laser and the like are available at present, however, for the PEEK pipeline with higher pipe internal pressure requirement, the traditional welding structure form, namely end face welding, is difficult to meet the performance requirement of high strength and high reliability, and particularly, in complex and severe environments such as vibration, high and low temperature impact and the like, a greater pipeline leakage risk exists. Laser welding has strict requirements on the light absorption and heat absorption performance of pipeline materials, ultrasonic welding has certain requirements on the structure of the end face, and circular pipe plastics are difficult to form a sealing weld joint. Fusion welding using plastic friction heating is a preferred method. However, conventional friction welding has limitations when applied to PEEK tubing.
For example, patent publication No. CN104476770A discloses thermal welding of end faces of equal-diameter pipes by using frictional heat, on one hand, this method is only suitable for common low-melting-point common engineering plastics, such as PA, PC, etc., and is not suitable for PEEK special engineering plastics with high melting point and high strength. On the other hand, the strength of a welding seam formed by end face butt welding is weak, particularly, the wall thickness of the welding seam is only about 1mm when a thin-wall pipe is welded, and the welding seam is difficult to realize complete sealing. Socket welding is a method often adopted for welding thin-walled pipes, and currently, common socket welding adopts heating elements such as a hot plate to respectively heat a pipe fitting and a joint, and then socket pressing welding is carried out. However, the method easily causes the fused tube body to be adhered to the heating element, the heating time is difficult to control accurately, and after long-time work, impurities of the heating element seriously affect subsequent quality welding.
Conventional plastic/non-metal welding methods include hot plate, ultrasonic, laser, infrared, ultraviolet, electromagnetic induction, resistance hot melt, rotary hot melt. The PEEK material is non-transparent and has high melting point, the welding seam is designed at the side surface of the cylinder contacted with the straight pipe and the pipe joint, the welding surface is required to be large, and the existing plastic welding method can not realize effective welding.
Disclosure of Invention
The invention aims to solve the technical problem that the traditional structure of the polyether-ether-ketone pipe joint cannot realize effective welding, and provides the polyether-ether-ketone pipe joint.
The invention solves the technical problems through the following technical means:
the invention provides a polyether-ether-ketone pipe joint which comprises a joint body, wherein openings are formed in two ends of the joint body, an annular groove and a limiting piece are arranged on the inner wall of the joint body, and the annular groove is located between the limiting piece and the end part of the joint body.
The working principle is as follows: fixing the straight pipe of polyether-ether-ketone, rotating the joint of polyether-ether-ketone, and moving the joint of polyether-ether-ketone to approach the straight pipe of polyether-ether-ketone, the two are fusion welded under interference fit, after welding, the fused mass is evenly distributed in the annular groove of the joint body, forming the sealing connection of the side face, and ensuring the welding air tightness.
Has the advantages that: the PEEK pipe joint can be matched with a PEEK pipe, so that subsequent welding is facilitated, and the feeding depth of the PEEK straight pipe is controlled by the limiting piece in the welding process.
Preferably, the joint body is in a hollow column shape, and the inner diameter of the joint body is 0.1-0.3mm smaller than the outer diameter of the polyether-ether-ketone straight pipe.
Has the advantages that: the interference fit amount of the inner wall size of the polyether-ether-ketone pipe joint and the outer diameter size of the polyether-ether-ketone straight pipe is ensured to be 0.1-0.3 mm.
Preferably, the outer diameter of the joint body is 12-38mm, and the wall thickness of the joint body is 1-1.5 mm.
Preferably, the annular groove is arranged coaxially with the joint body.
Preferably, the width of the annular groove is 1-2mm, and the depth of the annular groove is 0.2-0.5 mm.
Preferably, the number of annular grooves is at least 1, be the welding part between this end of joint body and the locating part, the annular groove is along the axial length direction equidistance distribution of welding part.
Preferably, the outer diameter of the joint body is 12mm, the wall thickness of the joint body is 1mm, the width of the annular groove is 1mm, the depth of the annular groove is 0.5mm, and the length of the welding part along the axis of the joint body is 15-20 mm.
Preferably, the outer diameter of the joint body is 25mm, the wall thickness of the joint body is 1.5mm, the width of the annular groove is 1mm, the depth of the annular groove is 0.5mm, and the length of the welding part along the axis of the joint body is 15-20 mm.
Preferably, the outer diameter of the joint body is 38mm, the wall thickness of the joint body is 1.5mm, the width of the annular groove is 2mm, the depth of the annular groove is 0.5mm, and the length of the welding part along the axis of the joint body is 15-20 mm.
Preferably, the one end that connects the body is equipped with the connecting piece, the connecting piece is the column, the external diameter of connecting piece is greater than the external diameter that connects the body, the connecting piece inside wall is equipped with interior groove, the interval of locating part to connecting piece is less than the interval of annular groove to connecting piece.
Has the advantages that: the inner groove of the inner side wall of the connecting piece is used for being matched with the hydraulic balance distributor, and then the outer side wall of the connecting piece is provided with a nut for fastening the connection between the connecting piece and the hydraulic balance distributor.
Preferably, the distance between the limiting part and the connecting part is 1-3 mm.
When the polyether-ether-ketone tube is in contact with the limiting piece, the welding is stopped, and enough space is reserved for the overflow of the solder.
The invention aims to solve the technical problem that the traditional structure of the polyether-ether-ketone pipe joint is difficult to meet the welding requirement, and provides a welding method adopting the polyether-ether-ketone pipe joint.
A welding method of a polyether-ether-ketone pipe joint comprises the following steps:
(1) adjusting the inner diameter of the joint body to be 0.1-0.3mm smaller than the outer diameter of the polyether-ether-ketone pipe, coaxially arranging the polyether-ether-ketone pipe and the polyether-ether-ketone pipe joint, fixing the polyether-ether-ketone pipe, enabling the polyether-ether-ketone pipe joint to rotate and approach the polyether-ether-ketone straight pipe along the same axis, and enabling the polyether-ether-ketone pipe to extend into the rotating polyether-ether-ketone pipe joint;
(2) and controlling the distance of the welding end of the polyether-ether-ketone pipe extending into the polyether-ether-ketone pipe joint, and stopping the movement and rotation of the polyether-ether-ketone joint when the distance between the welding end of the polyether-ether-ketone pipe and the limiting part is 1-3mm, so as to finish welding.
Has the advantages that: the welding method adopted by the invention can ensure large-area welding of the cylindrical surface at the contact position, has high weld strength, good sealing performance, controllable flash and no defect in the interior of the weld, and meets the working condition requirements of vibration and high-temperature severe environment; the adopted welding method can weld polyether ether ketone (PEEK) with high melting point (not less than 340 ℃) and modified materials thereof; the adopted pipe joint design and sealing welding method has no limit to the size of the liquid cooling pipeline system, and can extend to the pipeline connection arranged more than or equal to 5 meters; the adopted welding method does not need to increase an additional heating system or an additional welding auxiliary agent or auxiliary material, and is simple to operate and high in efficiency.
Preferably, the joint body is in a hollow column shape, and the inner diameter of the joint body is 0.1-0.3mm smaller than the outer diameter of the polyether-ether-ketone pipe.
Has the advantages that: the interference fit amount of the inner wall size of the polyether-ether-ketone pipe joint and the outer diameter size of the polyether-ether-ketone pipe is ensured to be 0.1-0.3 mm.
Preferably, the outer diameter of the joint body is 12-38mm, and the wall thickness of the joint body is 1-1.5 mm.
Preferably, the annular groove is arranged coaxially with the joint body.
Preferably, the width of the annular groove is 1-2mm, and the depth of the annular groove is 0.2-0.5 mm.
Preferably, the number of annular grooves is at least 1, be the welding part between this end of joint body and the locating part, the annular groove is along the axial length direction equidistance distribution of welding part.
Preferably, the length of the welding portion along the axis of the joint body is 15-20 mm.
Preferably, the external diameter of joint body is 12mm, and the wall thickness of joint body is 1mm, the width of annular groove is 1mm, the degree of depth of annular groove is 0.5 mm.
Preferably, the external diameter of the joint body is 25mm, the wall thickness of the joint body is 1.5mm, the width of the annular groove is 1mm, and the depth of the annular groove is 0.5 mm.
Preferably, the outer diameter of the joint body is 38mm, the wall thickness of the joint body is 1.5mm, the width of the annular groove is 2mm, and the depth of the annular groove is 0.5 mm.
Preferably, before the PEEK pipe is contacted with the PEEK pipe joint, the feeding speed of the PEEK joint is adjusted to be 800mm/min for 600-one, and the rotating speed of the PEEK joint is adjusted to be 2000-one for 1200-one; after the PEEK pipe is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe joint is adjusted to be 350-1800 mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 800-1800 r/min.
Preferably, the fixing piece is sleeved on the outer side wall of the polyether-ether-ketone pipe joint.
Has the advantages that: the bulge deformation caused by the outward expansion of the flash when the PEEK pipe joint is melted at high temperature is prevented through the sleeved fixing piece.
Preferably, the fixing member is a snap ring.
Preferably, a gasket or a film is arranged between the clamping ring and the outer side wall of the polyether-ether-ketone pipe joint.
Has the advantages that: and a gasket or a film is added to ensure that the clamping ring clamps the polyether-ether-ketone pipe joint and prevent the polyether-ether-ketone pipe joint from falling off in the rotating process.
Preferably, before the PEEK pipe with the outer diameter of 12mm contacts the PEEK pipe joint, the feeding speed of the PEEK joint is adjusted to be 600-800mm/min, and the rotating speed of the PEEK joint is adjusted to be 1200-2000 r/min; after the PEEK pipe is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe joint is adjusted to be 350-550mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 850-1200 r/min.
Preferably, before the PEEK pipe with the outer diameter of 25mm contacts the PEEK pipe joint, the feeding speed of the PEEK joint is adjusted to be 600-800mm/min, and the rotating speed of the PEEK joint is adjusted to be 1200-2000 r/min; after the PEEK pipe is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe joint is adjusted to be 350-550mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 900-1400 r/min.
Preferably, before the PEEK pipe with the outer diameter of 38mm contacts the PEEK pipe joint, the feeding speed of the PEEK joint is adjusted to be 600-800mm/min, and the rotating speed of the PEEK joint is adjusted to be 1200-2000 r/min; after the PEEK pipe is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe joint is adjusted to be 350-1800 mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 800-1800 r/min.
Preferably, the tolerance of the outer diameter of the welding end of the polyether-ether-ketone pipe with the outer diameter of 12mm is within +/-0.1 mm, and the tolerance of the pipe wall of the polyether-ether-ketone pipe is within +/-0.1 mm.
Preferably, the tolerance of the outer diameter of the welding end of the polyetheretherketone pipe with the outer diameter of 25mm is within plus or minus 0.12mm, and the tolerance of the pipe wall of the polyetheretherketone pipe is within plus or minus 0.12 mm.
Preferably, the tolerance of the outer diameter of the welding end of the polyether-ether-ketone pipe with the outer diameter of 38mm is within +/-0.2 mm, and the tolerance of the pipe wall of the polyether-ether-ketone pipe is within +/-0.2 mm.
The invention has the advantages that:
(1) the welding method adopted by the invention can realize the fusion welding of the PEEK pipe joint and the PEEK pipe under the interference fit, and after the welding, the melt is uniformly distributed in the groove on the inner side wall of the PEEK pipe joint, so that the large-area welding of the cylindrical surface of the contact part can be ensured, the weld joint strength is high, the sealing performance is good, the flash is controllable, the inside of the weld joint is free from defects, and the working condition requirements of vibration and high-temperature severe environment are met;
(2) the adopted welding method can weld polyether ether ketone (PEEK) with high melting point (not less than 340 ℃) and modified materials thereof;
(3) the adopted pipe joint design and sealing welding method has no limit to the size of the liquid cooling pipeline system, and can extend to the pipeline connection arranged more than or equal to 5 meters;
(4) the adopted welding method does not need to increase an additional heating system or an additional welding auxiliary agent or auxiliary material, and is simple to operate and high in efficiency.
Drawings
Fig. 1 is a schematic cross-sectional structure view of a pipe joint of polyetheretherketone in embodiment 1 of the present invention;
fig. 2 is a schematic cross-sectional structure view of a pipe joint of polyetheretherketone in embodiment 2 of the present invention;
fig. 3 is a schematic cross-sectional structure view of a pipe joint of polyetheretherketone in embodiment 3 of the present invention;
FIG. 4 is a schematic view of the welding fit of the PEEK pipe joint and the PEEK pipe of the present invention;
FIG. 5 is a schematic structural view of a snap ring according to embodiment 4 of the present invention;
in the figure: a joint body 1; an annular groove 11; a stopper 12; a connecting member 13; a polyether ether ketone pipe 2; a first clamping tool 3; a first clamping tool 4; a snap ring 5; a snap ring body 51; a connecting plate 52.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. 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 will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Example 1
The utility model provides a polyether ether ketone coupling, as shown in figure 1, including connecting body 1, it is hollow column to connect body 1, the both ends that connect body 1 are equipped with the opening, the inside wall that connects body 1 is equipped with annular groove 11 and locating part 12, annular groove 11 and the coaxial setting of connecting body 1, annular groove 11 is located between locating part 12 and the 1 tip of connecting body, locating part 12 is the column, locating part 12 and the coaxial setting of connecting body 1, be the welding part between 1 tip of connecting body and the locating part 12, the number of annular groove 11 sets up according to actual need, when the number of annular groove 11 is a plurality of, a plurality of annular groove 11 distribute along welding part's axis length direction equidistance.
In order to facilitate the matching connection of the joint body 1 and the hydraulic balance distributor, one end of the joint body 1 is fixedly connected with the connecting piece 13, the joint body 1 and the connecting piece 13 are integrally formed, the connecting piece 13 is in a hollow column shape, the outer diameter of the connecting piece 13 is larger than that of the joint body 1, an inner groove is arranged on the inner side wall of the connecting piece 13, one end of the connecting piece 13 with a smaller inner diameter is fixedly connected with the joint body 1, external threads are arranged on the outer side wall of the connecting piece 13, and the outer side wall of the connecting piece 13 is in threaded connection with a nut; the distance from the center of the limiting piece 12 to the center of the connecting piece 13 is smaller than the distance from the center of the annular groove 11 to the center of the connecting piece 13, and the vertical distance between the center of the limiting piece 12 and the center of the end part of the joint body 1 close to the connecting piece 13 is 1-3mm, so that enough space is reserved for solder overflow.
The external diameter of the joint body 1 in this embodiment is 12mm, the wall thickness of the joint body 1 is 1mm, the number of the annular grooves 11 is 1, the annular grooves 11 are located between the end of the joint body 1 and the limiting part 12, the width of the annular grooves 11 is 1mm, and the depth of the annular grooves 11 is 0.2-0.5 mm.
In the embodiment, the tolerance of the outer diameter of the welding end of the polyether-ether-ketone pipe 2 is within +/-0.1 mm, and the tolerance of the pipe wall of the polyether-ether-ketone pipe 2 is within +/-0.1 mm. The inner diameter of the joint body 1 is 0.1-0.2mm smaller than the outer diameter of the polyether-ether-ketone pipe 2, and the interference fit amount of the inner wall size of the polyether-ether-ketone pipe joint and the outer diameter size of the polyether-ether-ketone pipe 2 is 0.1-0.2 mm.
In this embodiment, the connector body 1 is made of pure polyetheretherketone or a modified polyetheretherketone material, both of which are in the prior art, wherein an auxiliary agent, particles, or fibers are added to the modified polyetheretherketone material. Wherein the auxiliary agent is an antioxidant or a lubricant, the particles are carbon nano tube particles, montmorillonite particles or graphene particles, and the fibers are glass fibers or carbon fibers.
Example 2
This embodiment is different from embodiment 1 in that: the external diameter that connects body 1 is 25mm, and the wall thickness that connects body 1 is 1.5mm, and as shown in fig. 2, the number of annular groove 11 is 2, and the width of annular groove 11 is 1mm, and the degree of depth of annular groove 11 is 0.5mm, and two annular grooves 11 are equidistantly distributed in welding length.
In the embodiment, the tolerance of the outer diameter of the welding end of the polyether-ether-ketone pipe 2 is within +/-0.12 mm, and the tolerance of the pipe wall of the polyether-ether-ketone pipe 2 is within +/-0.12 mm. The inner diameter of the joint body 1 is 0.1-0.2mm smaller than the outer diameter of the polyether-ether-ketone pipe 2, and the interference fit amount of the inner wall size of the polyether-ether-ketone pipe joint and the outer diameter size of the polyether-ether-ketone pipe 2 is 0.1-0.2 mm.
Example 3
This embodiment is different from embodiment 1 in that: the external diameter of connecting body 1 is 38mm, and the wall thickness of connecting body 1 is 1.5mm, and as shown in fig. 3, the number of annular groove 11 is at least 3, and the width of annular groove 11 is 2mm, and the degree of depth of annular groove 11 is 0.5mm, and annular groove 11 is equidistantly distributed in welding length.
In the embodiment, the tolerance of the outer diameter of the welding end of the polyether-ether-ketone pipe 2 is within +/-0.2 mm, and the tolerance of the pipe wall of the polyether-ether-ketone pipe 2 is within +/-0.2 mm. The inner diameter of the joint body 1 is 0.2-0.3mm smaller than the outer diameter of the polyether-ether-ketone pipe 2, and the interference fit amount of the inner wall size of the polyether-ether-ketone pipe joint and the outer diameter size of the polyether-ether-ketone pipe is 0.2-0.3 mm.
Example 4
The welding method of the pipe joint of the polyether-ether-ketone pipe in the embodiment 1 comprises the following steps:
(1) as shown in fig. 4, the polyetheretherketone pipe 2 is mounted on a first clamping tool 33, and the polyetheretherketone pipe joint is mounted on a first clamping tool 4, wherein the first clamping tool 33 and the first clamping tool 4 are the prior art, so that the polyetheretherketone pipe 2 and the polyetheretherketone pipe joint are coaxially arranged, and the coaxiality is not more than 0.05 mm; the first clamping tool 33 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; the structural schematic diagram of the snap ring 5 is shown in fig. 5, and includes a snap ring body 51, two ends of the snap ring body 51 are respectively fixedly connected with the connecting plate 52, the snap ring body 51 and the connecting plate 52 are integrally formed, a threaded hole is formed in the connecting plate 52, a bolt is screwed into the threaded hole, one end of the bolt penetrates through the threaded hole and is in threaded connection with a nut, and the snap ring 5 in the embodiment can also be the prior art.
(3) Welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 33 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 600r/min, and the rotating speed of the PEEK pipe joint is 1200 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 350mm/min, and the rotating speed of the PEEK pipe joint is 850 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 33 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is in contact with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, and the welded part has no color difference and no excessive sol overflow; 6 kg 5min airtight pressure maintaining test is carried out, the result is not leaked, and the welding test is proved to be good.
Example 5
The welding method of the pipe joint of the polyether-ether-ketone pipe in the embodiment 1 comprises the following steps:
(1) installing the polyether-ether-ketone pipe 2 on a first clamping tool 33, installing a polyether-ether-ketone pipe joint on a first clamping tool 4, and enabling the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint to be coaxially arranged, wherein the coaxiality is not more than 0.05 mm; the first clamping tool 33 and the first clamping tool 4 are in the prior art, the first clamping tool 33 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 33 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 700r/min, and the rotating speed of the PEEK pipe joint is 1300 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 400mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 1000 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 33 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is in contact with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, and the welded part has no color difference and no excessive sol overflow; 6 kg 5min airtight pressure maintaining test is carried out, the result is not leaked, and the welding test is proved to be good.
Example 6
The welding method of the pipe joint of the polyether-ether-ketone pipe in the embodiment 1 comprises the following steps:
(1) installing the polyether-ether-ketone pipe 2 on a first clamping tool 33, installing a polyether-ether-ketone pipe joint on a first clamping tool 4, and enabling the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint to be coaxially arranged, wherein the coaxiality is not more than 0.05 mm; the first clamping tool 33 and the first clamping tool 4 are in the prior art, the first clamping tool 33 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 33 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe is adjusted to be 800r/min, and the rotating speed of the PEEK pipe joint is 1500 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to 550mm/min, and the rotating speed of the PEEK pipe joint is adjusted to 1200 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 33 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is in contact with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, and the welded part has no color difference and no excessive sol overflow; 6 kg 5min airtight pressure maintaining test is carried out, the result is not leaked, and the welding test is proved to be good.
Comparative example 1
The welding method of the pipe joint of the polyether-ether-ketone pipe in the embodiment 1 comprises the following steps:
(1) installing the polyether-ether-ketone pipe 2 on a first clamping tool 33, installing a polyether-ether-ketone pipe joint on a first clamping tool 4, and enabling the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint to be coaxially arranged, wherein the coaxiality is not more than 0.05 mm; the first clamping tool 33 and the first clamping tool 4 are in the prior art, the first clamping tool 33 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 33 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 800r/min, and the rotating speed of the PEEK pipe joint is 1500 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 300mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 800 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 33 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is in contact with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, a local adhesion phenomenon exists between the polyether-ether-ketone joint at the welding part and the straight pipe, the temperature rise is insufficient due to too low rotating speed in the welding process, the interference material cannot be sufficiently melted, and the welding failure is caused by improper welding parameters.
Comparative example 2
The welding method of the pipe joint of the polyether-ether-ketone pipe in the embodiment 1 comprises the following steps:
(1) installing the polyether-ether-ketone pipe 2 on a first clamping tool 33, installing a polyether-ether-ketone pipe joint on a first clamping tool 4, and enabling the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint to be coaxially arranged, wherein the coaxiality is not more than 0.05 mm; the first clamping tool 33 and the first clamping tool 4 are in the prior art, the first clamping tool 33 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 33 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 800r/min, and the rotating speed of the PEEK pipe joint is 1500 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 600mm/min, and the rotating speed of the PEEK pipe joint is 1250 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 33 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is in contact with the limiting part 12 to finish welding.
The welded joint in the embodiment is checked, a large amount of sol overflows from the side wall of the joint, and the side wall of the joint is whitened, because the side wall is extruded and stressed too much due to too high temperature rise and too fast feeding caused by too high rotating speed in the welding process, and the welding parameter is improper and the welding fails.
Example 7
The welding method of the polyether-ether-ketone pipe joint in the embodiment 2 comprises the following steps:
(1) installing the polyether-ether-ketone pipe 2 on a first clamping tool 33, installing a polyether-ether-ketone pipe joint on a first clamping tool 4, and enabling the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint to be coaxially arranged, wherein the coaxiality is not more than 0.05 mm; the first clamping tool 33 and the first clamping tool 4 are in the prior art, the first clamping tool 33 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 33 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 600r/min, and the rotating speed of the PEEK pipe joint is 1200 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 350mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 900 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 33 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is in contact with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, and the welded part has no color difference and no excessive sol overflow; 6 kg 5min airtight pressure maintaining test is carried out, the result is not leaked, and the welding test is proved to be good.
Example 8
The welding method of the polyether-ether-ketone pipe joint in the embodiment 2 comprises the following steps:
(1) installing the polyether-ether-ketone pipe 2 on a first clamping tool 33, installing a polyether-ether-ketone pipe joint on a first clamping tool 4, and enabling the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint to be coaxially arranged, wherein the coaxiality is not more than 0.05 mm; the first clamping tool 33 and the first clamping tool 4 are in the prior art, the first clamping tool 33 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 33 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 700r/min, and the rotating speed of the PEEK pipe joint is 1600 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 400mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 1200 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 33 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is in contact with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, and the welded part has no color difference and no excessive sol overflow; 6 kg 5min airtight pressure maintaining test is carried out, the result is not leaked, and the welding test is proved to be good.
Example 9
The welding method of the polyether-ether-ketone pipe joint in the embodiment 2 comprises the following steps:
(1) installing the polyether-ether-ketone pipe 2 on a first clamping tool 33, installing a polyether-ether-ketone pipe joint on a first clamping tool 4, and enabling the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint to be coaxially arranged, wherein the coaxiality is not more than 0.05 mm; the first clamping tool 33 and the first clamping tool 4 are in the prior art, the first clamping tool 33 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 33 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 800r/min, and the rotating speed of the PEEK pipe joint is adjusted to be 2000 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to 550mm/min, and the rotating speed of the PEEK pipe joint is 1400 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 33 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is in contact with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, and the welded part has no color difference and no excessive sol overflow; 6 kg 5min airtight pressure maintaining test is carried out, the result is not leaked, and the welding test is proved to be good.
Comparative example 3
The welding method of the polyether-ether-ketone pipe joint in the embodiment 2 comprises the following steps:
(1) installing the polyether-ether-ketone pipe 2 on a first clamping tool 33, installing a polyether-ether-ketone pipe joint on a first clamping tool 4, and enabling the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint to be coaxially arranged, wherein the coaxiality is not more than 0.05 mm; the first clamping tool 33 and the first clamping tool 4 are in the prior art, the first clamping tool 33 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 33 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 800r/min, and the rotating speed of the PEEK pipe joint is adjusted to be 2000 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 300mm/min, and the rotating speed of the PEEK pipe joint is 850 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 3 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is contacted with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, a local adhesion phenomenon exists between the polyether-ether-ketone joint at the welding part and the straight pipe, the temperature rise is insufficient due to too low rotating speed in the welding process, the interference material cannot be sufficiently melted, and the welding failure is caused by improper welding parameters.
Comparative example 4
The welding method of the polyether-ether-ketone pipe joint in the embodiment 2 comprises the following steps:
(1) installing a polyether-ether-ketone pipe 2 on a first clamping tool 3, and installing a polyether-ether-ketone pipe joint on a first clamping tool 4, so that the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint are coaxially arranged, and the coaxiality is not more than 0.05 mm; the first clamping tool 3 and the first clamping tool 4 are in the prior art, the first clamping tool 3 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 3 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 800r/min, and the rotating speed of the PEEK pipe joint is adjusted to be 2000 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 600mm/min, and the rotating speed of the PEEK pipe joint is 1450 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 3 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is contacted with the limiting part 12 to finish welding.
The welded joint in the embodiment is checked, a large amount of sol overflows from the side wall of the joint, and the side wall of the joint is whitened, because the side wall is extruded and stressed too much due to too high temperature rise and too fast feeding caused by too high rotating speed in the welding process, and the welding parameter is improper and the welding fails.
Example 10
The welding method of the polyether-ether-ketone pipe joint in the embodiment 3 comprises the following steps:
(1) installing a polyether-ether-ketone pipe 2 on a first clamping tool 3, and installing a polyether-ether-ketone pipe joint on a first clamping tool 4, so that the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint are coaxially arranged, and the coaxiality is not more than 0.05 mm; the first clamping tool 3 and the first clamping tool 4 are in the prior art, the first clamping tool 3 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 3 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 600r/min, and the rotating speed of the PEEK pipe joint is 1200 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 350mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 800 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 3 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is contacted with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, and the welded part has no color difference and no excessive sol overflow; 6 kg 5min airtight pressure maintaining test is carried out, the result is not leaked, and the welding test is proved to be good.
Example 11
The welding method of the polyether-ether-ketone pipe joint in the embodiment 3 comprises the following steps:
(1) installing a polyether-ether-ketone pipe 2 on a first clamping tool 3, and installing a polyether-ether-ketone pipe joint on a first clamping tool 4, so that the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint are coaxially arranged, and the coaxiality is not more than 0.05 mm; the first clamping tool 3 and the first clamping tool 4 are in the prior art, the first clamping tool 3 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 3 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 700r/min, and the rotating speed of the PEEK pipe joint is 1800 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 450mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 1200 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 3 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is contacted with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, and the welded part has no color difference and no excessive sol overflow; 6 kg 5min airtight pressure maintaining test is carried out, the result is not leaked, and the welding test is proved to be good.
Example 12
The welding method of the polyether-ether-ketone pipe joint in the embodiment 3 comprises the following steps:
(1) installing a polyether-ether-ketone pipe 2 on a first clamping tool 3, and installing a polyether-ether-ketone pipe joint on a first clamping tool 4, so that the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint are coaxially arranged, and the coaxiality is not more than 0.05 mm; the first clamping tool 3 and the first clamping tool 4 are in the prior art, the first clamping tool 3 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 3 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 800r/min, and the rotating speed of the PEEK pipe joint is adjusted to be 2000 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to 550mm/min, and the rotating speed of the PEEK pipe joint is 1800 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 3 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is contacted with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, and the welded part has no color difference and no excessive sol overflow; 6 kg 5min airtight pressure maintaining test is carried out, the result is not leaked, and the welding test is proved to be good.
Comparative example 5
The welding method of the polyether-ether-ketone pipe joint in the embodiment 3 comprises the following steps:
(1) installing a polyether-ether-ketone pipe 2 on a first clamping tool 3, and installing a polyether-ether-ketone pipe joint on a first clamping tool 4, so that the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint are coaxially arranged, and the coaxiality is not more than 0.05 mm; the first clamping tool 3 and the first clamping tool 4 are in the prior art, the first clamping tool 3 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 3 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 800r/min, and the rotating speed of the PEEK pipe joint is adjusted to be 2000 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 300mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 750 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 3 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is contacted with the limiting part 12 to finish welding.
The welded joint in the embodiment is inspected, a local adhesion phenomenon exists between the polyether-ether-ketone joint at the welding part and the straight pipe, the temperature rise is insufficient due to too low rotating speed in the welding process, the interference material cannot be sufficiently melted, and the welding failure is caused by improper welding parameters.
Comparative example 6
The welding method of the polyether-ether-ketone pipe joint in the embodiment 3 comprises the following steps:
(1) installing a polyether-ether-ketone pipe 2 on a first clamping tool 3, and installing a polyether-ether-ketone pipe joint on a first clamping tool 4, so that the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint are coaxially arranged, and the coaxiality is not more than 0.05 mm; the first clamping tool 3 and the first clamping tool 4 are in the prior art, the first clamping tool 3 drives the polyether-ether-ketone pipe 2 to move along the axis of the polyether-ether-ketone pipe, and the first clamping tool 4 drives the polyether-ether-ketone pipe joint to rotate and move along the axis of the polyether-ether-ketone pipe 2;
(2) the outer side wall of the welding surface of the polyether-ether-ketone pipe joint is sleeved with a clamping ring 5, and a gasket or a thin film is arranged between the clamping ring 5 and the outer side wall of the polyether-ether-ketone pipe joint, so that the clamping ring 5 is ensured to clamp the polyether-ether-ketone pipe joint, and the polyether-ether-ketone pipe joint is prevented from falling off in the rotating process; wherein the snap ring 5 is prior art;
(3) welding: the polyether-ether-ketone pipe 2 and the polyether-ether-ketone pipe joint move oppositely along the same axis, so that the polyether-ether-ketone pipe 2 extends into the rotating polyether-ether-ketone pipe joint; before the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the first clamping tool 3 is adjusted, so that the moving speed of the PEEK pipe 2 along the axis of the PEEK pipe 2 is adjusted to be 800r/min, and the rotating speed of the PEEK pipe joint is adjusted to be 2000 r/min; after the PEEK pipe 2 is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe 2 is adjusted to be 600mm/min, and the rotating speed of the PEEK pipe joint is 1850 r/min;
(4) and controlling the distance that the welding end of the polyether-ether-ketone pipe 2 extends into the polyether-ether-ketone pipe joint, and stopping the first clamping tool 3 and the first clamping tool 4 when the welding end of the polyether-ether-ketone pipe 2 is contacted with the limiting part 12 to finish welding.
The welded joint in the embodiment is checked, a large amount of sol overflows from the side wall of the joint, and the side wall of the joint is whitened, because the side wall is extruded and stressed too much due to too high temperature rise and too fast feeding caused by too high rotating speed in the welding process, and the welding parameter is improper and the welding fails.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (9)

1. A polyether-ether-ketone pipe joint is characterized in that: the connector comprises a connector body, wherein openings are formed in two ends of the connector body, an annular groove and a limiting piece are arranged in the inner wall of the connector body, and the annular groove is located between the limiting piece and the end portion of the connector body;
a connecting piece is arranged at one end of the joint body, the connecting piece is columnar, the outer diameter of the connecting piece is larger than that of the joint body, an inner groove is formed in the inner side wall of the connecting piece, and the distance between the limiting piece and the connecting piece is smaller than that between the annular groove and the connecting piece;
the welding method of the polyether-ether-ketone pipe joint comprises the following steps:
(1) adjusting the inner diameter of the joint body to be 0.1-0.3mm smaller than the outer diameter of the polyether-ether-ketone pipe, coaxially arranging the polyether-ether-ketone pipe and the polyether-ether-ketone pipe joint, fixing the polyether-ether-ketone pipe, moving the rotating polyether-ether-ketone joint to be close to the polyether-ether-ketone pipe, and enabling the polyether-ether-ketone pipe to extend into the rotating polyether-ether-ketone pipe joint;
(2) controlling the distance that the welding end of the polyether-ether-ketone pipe extends into the polyether-ether-ketone pipe joint, and stopping the movement and rotation of the polyether-ether-ketone pipe joint when the distance between the welding end of the polyether-ether-ketone pipe and the limiting piece is 1-3mm, so as to finish welding;
the fixing piece is sleeved on the outer side wall of the polyether-ether-ketone pipe joint.
2. The PEEK pipe joint of claim 1, wherein: the outer diameter of the joint body is 12-38mm, and the wall thickness of the joint body is 1-1.5 mm.
3. The PEEK pipe joint of claim 2, wherein: the width of the annular groove is 1-2mm, and the depth of the annular groove is 0.2-0.5 mm.
4. A welding method using a polyetheretherketone pipe joint according to any of claims 1 to 3, wherein: the method comprises the following steps:
(1) adjusting the inner diameter of the joint body to be 0.1-0.3mm smaller than the outer diameter of the polyether-ether-ketone pipe, coaxially arranging the polyether-ether-ketone pipe and the polyether-ether-ketone pipe joint, fixing the polyether-ether-ketone pipe, moving the rotating polyether-ether-ketone joint to be close to the polyether-ether-ketone pipe, and enabling the polyether-ether-ketone pipe to extend into the rotating polyether-ether-ketone pipe joint;
(2) and controlling the distance of the welding end of the polyether-ether-ketone pipe extending into the polyether-ether-ketone pipe joint, and stopping the movement and rotation of the polyether-ether-ketone pipe joint when the distance between the welding end of the polyether-ether-ketone pipe and the limiting part is 1-3mm, so as to finish welding.
5. The method of welding a PEEK pipe joint of claim 4, wherein: before the PEEK pipe is contacted with the PEEK pipe joint, the feeding speed of the PEEK joint is adjusted to be 800mm/min for 600-materials, and the rotating speed of the PEEK joint is adjusted to be 2000r/min for 1200-materials; after the PEEK pipe is contacted with the PEEK pipe joint, the feeding speed of the PEEK pipe joint is adjusted to be 350-1800 mm/min, and the rotating speed of the PEEK pipe joint is adjusted to be 800-1800 r/min.
6. The method of welding a PEEK pipe joint of claim 4, wherein: the number of annular groove is 1 at least, be the welding part between this end of body of joint and the locating part, the annular groove distributes along welding part's axis length direction equidistance.
7. The method of welding a PEEK pipe joint of claim 5, wherein: the external diameter of connecting the body is 25mm, and the wall thickness that connects the body is 1.5mm, the width of annular groove is 1mm, and the degree of depth of annular groove is 0.5 mm.
8. The method of welding a PEEK pipe joint of claim 5, wherein: the external diameter of connecting the body is 38mm, and the wall thickness that connects the body is 1.5mm, the width of annular groove is 2mm, and the degree of depth of annular groove is 0.5 mm.
9. The method of welding a PEEK pipe joint of claim 4, wherein: the fixing piece is sleeved on the outer side wall of the polyether-ether-ketone pipe joint.
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CN102165239A (en) * 2008-09-26 2011-08-24 旭有机材工业株式会社 Process for joining piping members and piping members consisting of polyphenylene ether resin composition which are joined by the process
CN102606814A (en) * 2012-03-01 2012-07-25 汪仕斌 Novel reducing-preventive pipe fitting
CN107883105A (en) * 2016-09-30 2018-04-06 维利塔斯公司 Fluid connector
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