CN111873440A - Plastic pulse hot riveting process - Google Patents

Plastic pulse hot riveting process Download PDF

Info

Publication number
CN111873440A
CN111873440A CN202010624268.8A CN202010624268A CN111873440A CN 111873440 A CN111873440 A CN 111873440A CN 202010624268 A CN202010624268 A CN 202010624268A CN 111873440 A CN111873440 A CN 111873440A
Authority
CN
China
Prior art keywords
hot riveting
heating
waiting
temperature
plastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010624268.8A
Other languages
Chinese (zh)
Other versions
CN111873440B (en
Inventor
刘峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jinhui Chuangxin Intelligent Technology Tianjin Co ltd
Original Assignee
Jinhui Chuangxin Intelligent Technology Tianjin Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jinhui Chuangxin Intelligent Technology Tianjin Co ltd filed Critical Jinhui Chuangxin Intelligent Technology Tianjin Co ltd
Priority to CN202010624268.8A priority Critical patent/CN111873440B/en
Publication of CN111873440A publication Critical patent/CN111873440A/en
Application granted granted Critical
Publication of CN111873440B publication Critical patent/CN111873440B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • B29C65/38—Impulse heating
    • 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
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/60—Riveting or staking
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91441—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time

Abstract

The invention provides a plastic pulse hot riveting process, which is used for heating a hot riveting head in a process of alternately electrifying and waiting for many times so that a round cap part of the hot riveting head reaches a preset temperature. The invention changes the original single heating-waiting heating process into a multiple heating-waiting process, wherein each heating and waiting are alternately carried out, the heating is carried out for a period of time, the waiting is carried out, a temperature transferring process is given, then the heating is carried out again, and the waiting is carried out, so that the temperature of the hot riveting head circular cap part reaches the preset temperature.

Description

Plastic pulse hot riveting process
Technical Field
The invention relates to the technical field of hot riveting processing, in particular to a plastic pulse hot riveting process.
Background
In the hot riveting, pulse voltage is applied to the hot riveting head to heat the head of the hot riveting head to reach a preset temperature, so that a product in contact with the head of the hot riveting head is quickly formed, and the temperature control of the head of the hot riveting head is crucial in the process.
In the prior art, the temperature of the head of the hot rivet head cannot be preset any more and can reach the preset temperature within the preset time, so that a defective product appears on the appearance of a product in the drawing process of the hot rivet head.
Disclosure of Invention
In view of the above, the present invention provides a plastic impulse hot riveting process to solve the problem that the temperature of the head of the hot rivet head in the prior art does not reach the predetermined temperature.
The invention provides a plastic pulse hot riveting process, which is used for heating a hot riveting head in a process of alternately electrifying and waiting for many times so that a round cap part of the hot riveting head reaches a preset temperature.
Preferably, the predetermined temperature is the working temperature of the hot rivet head.
Preferably, the predetermined temperature is 280 ℃ to 330 ℃.
Preferably, an alternating voltage having an effective value of 3V is applied to the circuit thereof.
Preferably, the hot rivet head is heated by three alternating energization and waiting processes.
Preferably, the time of the power-on is 0.4-1.2s, and the waiting time is 0.6-1.4 s.
Preferably, the time of the power-on is 0.8s, and the waiting time is 1 s.
The invention has the advantages and positive effects that: the invention changes the original single heating-waiting heating process into a multiple heating-waiting process, wherein each heating and waiting are alternately carried out, the heating is carried out for a period of time, the waiting is carried out, a temperature transferring process is given, then the heating is carried out again, and the waiting is carried out, so that the temperature of the hot riveting head circular cap part reaches the preset temperature.
Drawings
FIG. 1 is a schematic structural view of a hot rivet head according to the present invention;
FIG. 2 is a schematic structural view of the hot riveting apparatus of the present invention;
fig. 3 is a schematic temperature curve of a hot rivet head according to a first embodiment of the present invention;
FIG. 4 is a temperature profile at 1.8s for example two of the present invention;
FIG. 5 is a temperature profile at 5.4s for example two of the present invention;
fig. 6 is a temperature profile of a second embodiment of the present invention.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description and accompanying drawings that illustrate the invention.
The hot rivet head 10 is structured as shown in fig. 1, and includes a circular cap portion 101, a middle slot 102 and a pulse applying portion 103; a pulse lead wire 20 is connected to the pulse applying unit 103, and a pulse signal is applied to the hot rivet head 10 through the pulse lead wire 20.
In the process of heating the hot riveting head 10, the circular cap part 101 of the hot riveting head 10 needs to be quickly heated to a preset temperature so as to perform thermoplastic forming on the material to be processed; in the prior art, the heating curve of the hot rivet head 10 is as shown in fig. 2, the hot rivet head 10 is continuously heated for a fixed time, and the heating time is 5.8s-6.2 s; however, during the use process, it is found that the temperature of the hot rivet head 10 cannot reach the expected temperature, and a defective product still occurs during the hot riveting process.
By repeatedly measuring the heating process of the rivet head 10 and obtaining the measurement result, the place where the heat generation is the most serious is located at the slot 102, which deviates from the requirement of the process because the current density at the slot 102 is the largest and the heat generation is the most serious, and the temperature of the circular cap part 101 is required to reach the preset temperature in the heating process, so that the material to be processed is subjected to thermoplastic forming.
The application provides a plastic pulse hot riveting process, which is used for heating a hot riveting head 10 in a process of multiple alternate energization and waiting so as to enable a round cap part 101 of the hot riveting head 10 to reach a preset temperature.
The predetermined temperature is 280 ℃ to 330 ℃ because the temperature is the optimal temperature range required in the hot riveting process.
The pulse applying section 103 is connected to the pulse applying cable 20 during heating thereof, and the pulse applying cable 20 is connected to the pulse plug 40 through the copper pipe 30.
In the process of pulse hot riveting through the hot riveting head 10, the specific parameters of each part are as follows:
(1) the pulse plug 40 is an aviation plug, and the resistance value of the aviation plug is 3m omega;
(2) the section area of the connecting line is 6mm2Has a total length of 8 m, which is assumed here to be 6mm equivalent copper pipe2The sectional area and the length are 8 m, and the resistance value is 0.0233 omega according to the calculation of a resistance calculation formula (particularly the resistance calculation formula shown below);
(3) the copper pipes 30 required for connecting the lines are two, each 100mm long and 2.2mm in diameter, and the total resistance value is 0.00092 omega by calculation according to the formula.
The resistance calculation formula is as follows:
Figure BDA0002564428020000031
where R is the resistance of the material and ρ is the resistivity of the material (where the resistivity of copper is 0.0175 Ω × mm)2And/m), l is the length of the material, and s is the cross-sectional area of the material.
By applying an alternating voltage of 3V in effective value to its circuit for a period of time TonThen the power-off waiting interval is set at a certain time ToffThe test was repeated several times.
The invention is realized by the opposite energization time TonAnd a waiting time ToffThe number of times of alternation (c) was repeated three times, and the obtained dome portion 101 was closest to the target temperature.
Example one
Figure BDA0002564428020000032
Figure BDA0002564428020000041
The resulting temperature profile is shown in fig. 3.
The temperature of the dome part 101 is found by its temperature profile, at the first heating TonAnd a first wait time ToffThen, the temperature reaches the maximum, and then is reduced to a certain extent, and analysis shows that the time for waiting is insufficient, so that the insufficient time for transmitting the temperature of the slotting part 102 to the circular cap part 101 is not provided; and increasing the duration of the waiting time according to the result and the analysis.
Example two
First heating time Ton 0.80S
First time waiting time Toff 1.00S
Second heating time Ton 0.80S
Second waiting time Toff 1.00S
Third heating time Ton 0.80S
Third waiting time Toff 1.00S
By modifying the first time waiting time ToffAnd the temperature during the heating of the hot rivet head is tracked to obtain the temperature distribution diagrams of fig. 4 and 5.
It is found from fig. 4 and 5 that the hottest place of the rivet head 10 is the notch 102 at 1.8s after heating, and the highest heat generation point moves down to move to the pulse applying part 103 at 5.4s after heating, and the temperature of the cap part 101 reaches 312 degrees.
As can be seen from the results, the place where the heat generation is most serious is located at the notch 102, and the pulse applying part 103 which is the middle-lower part moves with time rather than the round cap part 101 of the hot rivet head because the current density is the largest at the notch 102, the heat generation is most serious, and the waiting time T is provided after each heatingoffCausing heat to begin over timeSpread all around so that the highest temperature rise point is shifted downward, i.e., to the pulse application section 103, and the hot rivet head circular cap section 101 is raised in temperature by heat transfer.
Specifically, the equivalent temperature rise process variation curve of the hot rivet head in the heating process is shown in fig. 6.
According to the detection result, the invention improves the heating process of the hot riveting head, changes the original single heating-waiting heating process into a multiple heating-waiting process, alternately performs heating and waiting each time, waits after heating for a period of time, transmits the temperature to a process, and then performs heating and waiting to enable the temperature of the hot riveting head circular cap part 101 to reach the preset temperature.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.

Claims (7)

1. A plastic pulse hot riveting process is characterized in that: and heating the hot riveting head in a process of alternately electrifying and waiting for a plurality of times to enable the round cap part of the hot riveting head to reach a preset temperature.
2. The plastic impulse hot riveting process according to claim 1, characterized in that: the preset temperature is the working temperature of the hot riveting head.
3. A plastic impulse hot riveting process according to claim 1 or 2, characterized in that: the predetermined temperature is 280 ℃ to 330 ℃.
4. The plastic impulse hot riveting process according to claim 1, characterized in that: an ac voltage having an effective value of 3V is applied to the circuit.
5. The plastic impulse hot riveting process according to claim 1, characterized in that: the hot riveting head is heated by three times of alternate electrifying and waiting processes.
6. The plastic impulse hot riveting process according to claim 1, characterized in that: the power-on time is 0.4-1.2s, and the waiting time is 0.6-1.4 s.
7. The plastic impulse hot riveting process according to claim 1, characterized in that: the power-on time is 0.8s, and the waiting time is 1 s.
CN202010624268.8A 2020-07-01 2020-07-01 Plastic pulse hot riveting process Active CN111873440B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010624268.8A CN111873440B (en) 2020-07-01 2020-07-01 Plastic pulse hot riveting process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010624268.8A CN111873440B (en) 2020-07-01 2020-07-01 Plastic pulse hot riveting process

Publications (2)

Publication Number Publication Date
CN111873440A true CN111873440A (en) 2020-11-03
CN111873440B CN111873440B (en) 2022-07-12

Family

ID=73149848

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010624268.8A Active CN111873440B (en) 2020-07-01 2020-07-01 Plastic pulse hot riveting process

Country Status (1)

Country Link
CN (1) CN111873440B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200641571A (en) * 2005-05-26 2006-12-01 Qing-Hai Tu Curvilinear heating device and method
CN103257658A (en) * 2013-05-10 2013-08-21 龙岩烟草工业有限责任公司 Feeding tank temperature control method and system
CN205148918U (en) * 2015-12-08 2016-04-13 成都泉源卫生用品有限公司 Automatic accuse temperature is rivet hot machine regularly
CN206884207U (en) * 2017-07-07 2018-01-16 麦格纳（太仓）汽车科技有限公司 Novel pulse hot-riveting device
CN108715035A (en) * 2018-04-27 2018-10-30 无锡中卓智能科技股份有限公司 A kind of more riveter rivet hot control methods
CN109947155A (en) * 2019-04-10 2019-06-28 樊晓东 A kind of method of multi-temperature zone gradient-controllable heating

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200641571A (en) * 2005-05-26 2006-12-01 Qing-Hai Tu Curvilinear heating device and method
CN103257658A (en) * 2013-05-10 2013-08-21 龙岩烟草工业有限责任公司 Feeding tank temperature control method and system
CN205148918U (en) * 2015-12-08 2016-04-13 成都泉源卫生用品有限公司 Automatic accuse temperature is rivet hot machine regularly
CN206884207U (en) * 2017-07-07 2018-01-16 麦格纳（太仓）汽车科技有限公司 Novel pulse hot-riveting device
CN108715035A (en) * 2018-04-27 2018-10-30 无锡中卓智能科技股份有限公司 A kind of more riveter rivet hot control methods
CN109947155A (en) * 2019-04-10 2019-06-28 樊晓东 A kind of method of multi-temperature zone gradient-controllable heating

Also Published As

Publication number Publication date
CN111873440B (en) 2022-07-12

Similar Documents

Publication Publication Date Title
FI4074367T3 (en) Arrays for delivering tumor treating fields (ttfields) with individually accessible electrode elements and temperature sensors
CN104515707A (en) Temperature measurement method for electrified tensile test piece and tensile test device
US4392051A (en) Parallel-type heating cable
CN111873440B (en) Plastic pulse hot riveting process
WO2022130183A3 (en) Pyroelectric-based temperature sensing of transducer arrays for applying tumor treating fields (ttfields)
CN105445116A (en) High-temperature multi-axial cyclic test device for polymer materials
Ocoleanu et al. Temperature investigations in two type of crimped connection using experimental determinations
CN202660142U (en) High-frequency electric heating material pipe
US4626667A (en) Radiant heater of short response time
CN102262933B (en) Flat cable and method for fabricating the same
KR200414017Y1 (en) Temperature Sensing Heater
CN103937669B (en) A kind of hand-held electroporation device
US1475162A (en) Electric heater
RU2013107647A (en) METHOD AND DEVICE FOR MEASURING THE TEMPERATURE OF MULTI-RESIDENT MATERIAL
KR101746560B1 (en) Multi-layered resistive-thermocouple type temperature measuring wafer sensor and method for fabricating the same
AU611237B2 (en) Positive temperature coefficient thermistor heating pad
CN113329533B (en) Electric heating belt with temperature detection function
US20210181035A1 (en) In-contact Continuous Temperature Measurement Probe for Non-insulated Electric-Current Carrying Conductor
CN204801240U (en) Gilt version electric heater unit of many warm areas
CN103369742A (en) High-frequency electric-heating rolling strip
CN213261166U (en) Plastic pulse hot riveting head and plastic pulse hot riveting equipment
JP6105142B1 (en) Manufacturing method of sheathed thermocouple, sheathed resistance temperature detector or sheathed heater, and heating device used in the manufacturing method
US20200329534A1 (en) Heater and method of manufacturing same
CN113227735A (en) Temperature sensing device
CN215425330U (en) Artificial limb temperature detection device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant