CN108544760B - Polyether-ether-ketone ultrasonic welding process method - Google Patents
Polyether-ether-ketone ultrasonic welding process method Download PDFInfo
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- CN108544760B CN108544760B CN201810343249.0A CN201810343249A CN108544760B CN 108544760 B CN108544760 B CN 108544760B CN 201810343249 A CN201810343249 A CN 201810343249A CN 108544760 B CN108544760 B CN 108544760B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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Abstract
The invention discloses a polyether-ether-ketone ultrasonic welding process method which is characterized by comprising the following steps of: selecting a polyether-ether-ketone part to be welded with energy-guiding ribs; placing the polyether-ether-ketone to-be-welded part with the energy guiding ribs into a circulating heating box for preheating treatment; compacting the preheated polyether-ether-ketone to-be-welded part; carrying out continuous ultrasonic processing welding on the welded junction of the compacted polyether-ether-ketone part to be welded by using ultrasonic waves; after the ultrasonic treatment is finished, the ultrasonic wave is removed, the temperature is cooled to normal temperature, and the state is recovered to normal pressure. The ultrasonic welding process method of the polyether-ether-ketone provided by the invention avoids the problem of deformation of welding materials in the traditional hot welding process, greatly improves the appearance attractiveness, and basically prevents welding traces from being seen on the outer surface of a welding part; the method has the advantages of simple process steps, simple and convenient operation, wide practicability, improvement of the product percent of pass, great improvement of the product welding strength and the like.
Description
Technical Field
The invention belongs to the field of special engineering plastic processing, and relates to a polyether-ether-ketone ultrasonic welding process method.
Background
Polyetheretherketone is a high-performance semi-crystalline thermoplastic material that was marketed by empire chemical in 1978. The polyether-ether-ketone has good specific strength and specific rigidity, and better toughness, impact resistance, dimensional stability, fatigue resistance and friction resistance; the melting point of the polyether-ether-ketone is 334 ℃, the load application temperature is 310 ℃, the continuous use temperature is 260 ℃, the decomposition temperature is 550 ℃, and the polyether-ether-ketone has excellent thermal stability; the flame retardance of a test sample of 1.45mm can reach the UL94V-0 level without adding any flame retardant, and the test sample has very little delayed release; the polyether-ether-ketone can be used as a C-grade insulating material, and the change of the insulating property along with the changes of temperature, pressure, current and humidity is very small; the polyether-ether-ketone is only dissolved in concentrated sulfuric acid, so that the chemical stability is very good; meanwhile, the composite material has good hydrolysis resistance and can be stably used for a long time in a high-temperature water vapor environment. The polyether-ether-ketone has great application potential and commercial value, and besides the excellent performance, the polyether-ether-ketone is used as a thermoplastic material, the molecular chain of the polyether-ether-ketone is in a linear structure, and the polyether-ether-ketone can be processed and spliced according to actual needs after being heated and melted, and can be combined into a more complex part by firstly manufacturing a simpler part and then welding, so that departments are fully utilized to cooperate, the production efficiency is improved, and the manufacturing cost is reduced.
In the prior art, the splicing modes of the existing thermoplastic materials mainly include fusion splicing, mechanical splicing, adhesive splicing and the like. The splicing method has certain defects in the splicing of the polyether-ether-ketone. For example: the relatively common PPR (polypropylene random copolymer) adopts a melt splicing mode, but the melt temperature of the polyether-ether-ketone is too high, meanwhile, the interface strength cannot be effectively ensured due to the semi-crystalline performance of the polyether-ether-ketone, and meanwhile, the interface strength is far lower than the strength of the material, so that the PPR is not suitable for use; the mechanical splicing mode is necessary to punch holes on the polyetheretherketone material, so that the strength of the material is weakened; because the corrosion resistance of the polyetheretherketone is excellent, an adhesive capable of effectively dissolving the polyetheretherketone cannot be found at the present stage. Under the condition, the research and development of the ultrasonic welding process suitable for the polyether-ether-ketone has very critical significance.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the polyetheretherketone ultrasonic welding process method is characterized by comprising the following steps:
1) selecting a polyether-ether-ketone part to be welded with energy-guiding ribs;
2) preheating treatment: placing the polyether-ether-ketone to-be-welded part with the energy guiding ribs into a circulating heating box for preheating treatment;
3) compacting the polyether-ether-ketone to-be-welded part preheated in the step 2);
4) ultrasonic welding: carrying out continuous ultrasonic treatment welding on the craters of the to-be-welded polyetheretherketone parts in the pressing state in the step 3) by using ultrasonic waves;
5) and 4) after the ultrasonic treatment is finished, removing the ultrasonic wave, cooling to normal temperature, and recovering to a normal pressure state.
Preferably, in step 1), the energy guiding ribs on the surface of the to-be-welded piece of polyetheretherketone adopt equilateral triangles with the vertex angle of 60 degrees and the height of 0.7 mm.
Preferably, in step 1), the preheating treatment preheats the polyetheretherketone weldment to 280 ℃.
Preferably, in the step 3), 300N continuous pressure is applied to the welding surface of the piece to be welded of the polyetheretherketone.
Preferably, in the step 4), the ultrasonic welding is to weld the craters of the polyetheretherketone parts to be welded after being pressed in the step 2) by using ultrasonic waves with the amplitude of 32 μm.
Preferably, the welding time of the ultrasonic welding is 2-5 s.
Preferably, an auxiliary agent is added in the welding process, and the auxiliary agent is aluminum oxide.
The application of the ultrasonic welding process method for the polyether-ether-ketone is characterized in that the ultrasonic welding process method for the polyether-ether-ketone is suitable for the polyether-ether-ketone and composite materials thereof, and comprises polyether-ether-ketone-based modified materials such as carbon fiber reinforcement and glass fiber reinforcement.
The invention at least comprises the following beneficial effects: the ultrasonic welding process method of the polyether-ether-ketone avoids the problem of deformation of welding materials in the traditional hot welding process, improves the product percent of pass, and greatly improves the welding strength; the appearance is greatly improved in the aspect of appearance, and welding marks can not be basically seen on the outer surface of a welding position; the investment of the previous welding rod and welding flux is replaced, and the welding cost is greatly reduced; the welding process is suitable for polyether-ether-ketone and composite materials thereof, including carbon fiber reinforced, glass fiber reinforced, wear-resistant series and the like.
Detailed Description
The present invention is described in further detail below to enable those skilled in the art to practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1:
in this embodiment, the ultrasonic welding process of polyetheretherketone includes the following steps:
1) selecting a polyether-ether-ketone part to be welded with energy-guiding ribs;
2) preheating treatment: placing the polyether-ether-ketone to-be-welded part with the energy guiding ribs into a circulating heating box for preheating treatment;
3) compacting the polyether-ether-ketone to-be-welded part preheated in the step 2);
4) ultrasonic welding: carrying out continuous ultrasonic treatment welding on the craters of the to-be-welded polyetheretherketone parts in the compression state in the step 3) by using ultrasonic waves with the amplitude of 30 micrometers;
5) and 4) after the ultrasonic treatment is finished, removing the ultrasonic wave, cooling to normal temperature, and recovering to a normal pressure state.
Preferably, in step 1), the energy guiding ribs on the surface of the to-be-welded piece of polyetheretherketone adopt equilateral triangles with the vertex angle of 60 degrees and the height of 0.7 mm. The energy guiding rib is an equilateral triangle with the apex angle of 60 degrees and the height of 0.7mm, so that energy waves are uniformly transmitted, and the welding quality is ensured.
Preferably, in step 1), the preheating treatment preheats the polyetheretherketone weldment to 280 ℃. The temperature is preheated to 280 ℃, the to-be-welded polyether-ether-ketone part is in a viscoelastic state, and internal molecules are active, so that the welding is facilitated, and the welding strength is improved.
Preferably, in the step 3), 300N continuous pressure is applied to the welding surface of the polyetheretherketone welding piece. The two melted and softened materials are kept with certain force, and under the action of 300N external force, the welding of the joint surfaces is firmer, and the contact area is larger; an external force exceeding 300N may cause deformation of the adhesive material, and a strong connection cannot be achieved with a force less than 300N.
Preferably, the welding time of the ultrasonic welding is 2-5 s.
Preferably, an auxiliary agent is added in the welding process, and the auxiliary agent is aluminum oxide. The aluminum oxide has the function of limiting the flow, so that the contact surface is more smooth, and the welding success rate is improved.
Example 2:
in this embodiment, the ultrasonic welding process of polyetheretherketone includes the following steps:
1) selecting a polyether-ether-ketone part to be welded with energy-guiding ribs;
2) preheating treatment: placing the polyether-ether-ketone to-be-welded part with the energy guiding ribs into a circulating heating box for preheating treatment;
3) compacting the polyether-ether-ketone to-be-welded part preheated in the step 2);
4) ultrasonic welding: carrying out continuous ultrasonic treatment welding on the craters of the to-be-welded polyetheretherketone parts in the pressing state in the step 3) by using ultrasonic waves;
5) and 4) after the ultrasonic treatment is finished, removing the ultrasonic wave, cooling to normal temperature, and recovering to a normal pressure state.
Preferably, in step 1), the energy guiding ribs on the surface of the to-be-welded piece of polyetheretherketone adopt equilateral triangles with the vertex angle of 60 degrees and the height of 0.7 mm.
Preferably, in step 1), the preheating treatment preheats the polyetheretherketone weldment to 280 ℃.
Preferably, in the step 3), 300N continuous pressure is applied to the welding surface of the polyetheretherketone welding piece.
Preferably, in the step 4), the ultrasonic welding is to weld the craters of the parts to be welded of the polyetheretherketone, which are compacted in the step 2), by using ultrasonic waves with the amplitude of 32 μm.
Preferably, the welding time of the ultrasonic welding is 2-5 s.
Preferably, an auxiliary agent is added in the welding process, and the auxiliary agent is aluminum oxide. The aluminum oxide has the function of limiting the flow, so that the contact surface is more smooth, and the welding success rate is improved.
In the embodiment, the energy guiding rib is an equilateral triangle with the apex angle of 60 degrees and the height of 0.7mm, so that energy waves are uniformly transmitted, and the welding quality is ensured; preheating the temperature to 280 ℃, wherein the polyether-ether-ketone part to be welded is in a viscoelastic state, so that internal molecules are more actively moved, the welding is convenient, and the welding strength is improved; the two melted and softened materials are kept with certain force, and under the action of 300N external force, the welding of the joint surfaces is firmer, and the contact area is larger; an external force exceeding 300N may cause deformation of the bonding material, and a firm connection effect cannot be achieved when the external force is less than 300N; the ultrasonic wave with the amplitude of 32 mu m has the best activation performance on the polyether-ether-ketone, and the ultrasonic welding effect and strength are ensured.
Through detection, the polyether-ether-ketone welded by the ultrasonic welding process method of polyether-ether-ketone in the embodiment 2 is greatly improved in appearance attractiveness, and welding marks cannot be basically seen on the outer surface of the welding position; and the product percent of pass and the welding strength are improved.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (5)
1. The polyetheretherketone ultrasonic welding process method is characterized by comprising the following steps:
1) selecting a polyether-ether-ketone part to be welded with energy-guiding ribs;
2) preheating treatment: placing the polyether-ether-ketone to-be-welded part with the energy guiding ribs into a circulating heating box for preheating treatment;
3) compacting the polyether-ether-ketone to-be-welded part preheated in the step 2);
4) ultrasonic welding: carrying out continuous ultrasonic treatment welding on the craters of the to-be-welded polyetheretherketone parts in the pressing state in the step 3) by using ultrasonic waves; an auxiliary agent is added in the welding process, and the auxiliary agent adopts aluminum oxide;
5) step 4), after the ultrasonic treatment is finished, removing the ultrasonic wave, cooling to normal temperature, and recovering to a normal pressure state;
the energy guiding ribs on the surface of the to-be-welded polyether-ether-ketone part adopt equilateral triangles with the apex angle of 60 degrees and the height of 0.7 mm.
2. The ultrasonic welding process of polyetheretherketone according to claim 1, wherein in step 1) the preheating treatment preheats the polyetheretherketone weldment to 280 ℃.
3. The ultrasonic welding process of PEEK according to claim 1, wherein in step 3), the welding surface of the PEEK workpiece to be welded is pressed with a continuous pressure of 300N.
4. The ultrasonic welding process of polyether-ether-ketone according to claim 1, wherein in step 4), the ultrasonic welding is performed by using ultrasonic waves with amplitude of 32 μm to weld craters of the parts to be welded of polyether-ether-ketone compacted in step 2).
5. The ultrasonic welding process of polyether ether ketone according to claim 4, wherein the welding time of ultrasonic welding is 2-5 s.
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| CN201810343249.0A CN108544760B (en) | 2018-04-17 | 2018-04-17 | Polyether-ether-ketone ultrasonic welding process method |
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| CN114958210B (en) * | 2022-07-13 | 2023-11-21 | 沈阳航空航天大学 | Ultrasonic welding method of high-temperature-resistant polyimide/polyaryletherketone composite membrane |
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