CN114543637A - Online real-time monitoring and adjusting device and method for straightness of composite pultrusion product - Google Patents
Online real-time monitoring and adjusting device and method for straightness of composite pultrusion product Download PDFInfo
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- CN114543637A CN114543637A CN202210122584.4A CN202210122584A CN114543637A CN 114543637 A CN114543637 A CN 114543637A CN 202210122584 A CN202210122584 A CN 202210122584A CN 114543637 A CN114543637 A CN 114543637A
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- 239000002131 composite material Substances 0.000 title claims abstract description 99
- 238000012544 monitoring process Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 62
- 238000001514 detection method Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A composite pultrusion product straightness online real-time monitoring and adjusting device comprises a monitoring mechanism and an adjusting mechanism, wherein the monitoring mechanism is arranged between an outlet of a composite pultrusion product die and a composite pultrusion product tractor, the adjusting mechanism is arranged on the front side of the composite pultrusion product tractor, the monitoring mechanism comprises a base positioning block, a magnetic frame and a dial indicator, the magnetic frame is arranged on the base positioning block, and the dial indicator is arranged on the magnetic frame; the adjusting mechanism comprises an adjusting bracket, and an adjusting roller matched with the composite material pultrusion product and a power mechanism for driving the adjusting roller to move are arranged on the adjusting bracket. The method and the device can effectively judge the straightness deviation direction and the deviation degree of the pultrusion product through online data and carry out real-time adjustment, so that the straightness of the composite pultrusion product meets the requirements, and the production quality of the effective composite pultrusion product is effectively guaranteed.
Description
Technical Field
The invention relates to the technical field of product straightness measurement, in particular to a composite material pultrusion product straightness online real-time monitoring and adjusting device and a method for monitoring and adjusting by using the composite material pultrusion product straightness online real-time monitoring and adjusting device.
Background
Currently, in the production process of composite material pultrusion products, the straightness of the products can be deviated for the following reasons:
1. performing, wherein a standard deviation exists between equipment and a tractor for a die body;
2. the material before preforming does not meet the set temperature and humidity requirement;
3. according to the existing production molding experience, in the production process, when new resin glue solution is produced, the concentration of the new glue solution and the old glue solution changes due to the storage time and the addition requirement, so that the change of straightness is influenced;
4. the change of the straightness can be caused to a certain extent even if the temperature and humidity of the demoulding cloth are changed or are not in the range of the numerical value requirement;
5. according to the comprehensive problems, unqualified straightness is found before coiling, so that the yield reject ratio is increased, the production cost is improved to a certain extent, but an effective monitoring method for early warning the straightness condition in the production process is not provided, so that the straightness can be corrected in time, and the straightness can be corrected in time in the process.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a composite material pultrusion product straightness online real-time monitoring and adjusting device which can monitor and adjust the straightness of a composite material pultrusion product online in real time in the production process of the composite material pultrusion product.
The invention also provides a monitoring and adjusting method of the composite material pultrusion product straightness online real-time monitoring and adjusting device.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to an online real-time monitoring and adjusting device for straightness of a composite pultrusion product, which comprises a monitoring mechanism and an adjusting mechanism, wherein the monitoring mechanism is arranged between an outlet of a composite pultrusion product die and a composite pultrusion product tractor, the adjusting mechanism is arranged on the front side of the composite pultrusion product tractor, the monitoring mechanism comprises a base positioning block, a magnetic frame and a dial indicator, the magnetic frame is arranged on the base positioning block, and the dial indicator is arranged on the magnetic frame;
the adjusting mechanism comprises an adjusting bracket, and an adjusting roller matched with the composite material pultrusion product and a power mechanism for driving the adjusting roller to move are arranged on the adjusting bracket.
The technical problem to be solved by the invention can be further realized by the following technical scheme that the online real-time monitoring and adjusting device for the straightness of the composite material pultrusion product comprises a magnetic base with a magnetic switch, a base positioning block is made of a magnetic conductive material, a magnetic supporting rod is fixedly installed on the magnetic base, a clamping support is installed on the magnetic supporting rod through a clamping screw, and a dial indicator is installed on the clamping support through a fastening screw.
The technical problem to be solved by the invention can be further realized by the following technical scheme that the online real-time monitoring and adjusting device for the straightness of the composite material pultrusion product further comprises a control mechanism, the control mechanism comprises a controller and a supporting platform convenient for the installation of the controller, the dial indicator is a digital display dial indicator with an RS485 data transmission function, and the dial indicator is connected with the input end of the controller.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the composite material pultrusion product straightness online real-time monitoring and adjusting device, an alarm lamp is also arranged on the supporting platform and connected with the output end of the controller
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the online real-time monitoring and adjusting device for the straightness of the composite material pultrusion product, the power mechanism is a ball screw, a screw rod of the ball screw is rotatably arranged on an adjusting bracket, an adjusting roller is fixedly arranged on a nut of the ball screw, and one end of the screw rod of the ball screw is also fixedly provided with a hand-operated wheel.
The technical problem to be solved by the invention can be further realized by the following technical scheme that 2 adjusting rollers are arranged on the composite material pultrusion product straightness online real-time monitoring and adjusting device, and an adjusting gap matched with the composite material pultrusion product is reserved between the 2 adjusting rollers.
The technical problem to be solved by the invention can be further realized by the following technical scheme that 2 monitoring mechanisms are arranged for the online real-time monitoring and adjusting device for the straightness of the composite pultrusion product, wherein one monitoring mechanism is arranged in the middle position between the outlet of the composite pultrusion product die and the composite pultrusion product tractor, and the other monitoring mechanism is arranged at the front side of the tractor and close to the adjusting mechanism.
The technical problem to be solved by the invention can be further realized by the following technical scheme, and the device for monitoring and adjusting the straightness of the composite material pultrusion product on line in real time and the method for monitoring and adjusting the straightness of the composite material pultrusion product on line in real time comprise the following steps:
(1) arranging a detection mechanism between an outlet of a composite pultrusion product die and a composite pultrusion product tractor, enabling a detection head of a dial indicator to be effectively parallel to the side face of a composite pultrusion product, and arranging an adjusting mechanism on the front side of the composite pultrusion product tractor;
(2) setting the dial indicator moving numerical value into the positive and negative value limits in the controller, and controlling an alarm lamp to send out an alarm signal when the numerical value exceeds the set numerical value;
(3) the pultrusion operation of the composite pultrusion product is started, the dial indicator monitors the straightness of the composite pultrusion product in real time, after the alarm lamp sends out an alarm signal, the position of the adjusting roller is adjusted through the hand wheel, and then the composite pultrusion product is moved, so that the alarm lamp stops alarming, and the straightness of the composite pultrusion product can meet the requirement.
The technical problem to be solved by the invention can be further realized by the following technical scheme, for the online real-time monitoring and adjusting method for the straightness accuracy of the composite material pultrusion product, in the step (2), the adjusting method for the positive value and the negative value of the dial indicator is as follows: firstly, a detecting head of the dial indicator extends out to the maximum length, and is centered at the center of the side face of the composite material pultrusion product, then the detecting head of the dial indicator retracts to the half of the maximum length, and contacts the side face of the composite material pultrusion product and is centered, so that the digital display dial indicator is cleared, and data of positive values and negative values exist in the dial indicator.
Compared with the prior art, the invention provides the online real-time monitoring and adjusting device and the online real-time monitoring and adjusting method for the straightness of the composite pultruded product, which mainly take the position of the die opening of the composite pultruded product as a starting point, at least one measuring point is arranged along the direction from the die outlet to the tractor, the deviation direction and the deviation degree of the straightness of the pultruded product can be effectively judged through online data through the data acquisition of each measuring point, and real-time adjustment is carried out, so that the straightness of the composite pultruded product meets the requirements, and the production quality of the effective composite pultruded product is effectively ensured.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of an installation structure of the magnetic frame and the dial indicator of the present invention;
FIG. 3 is a schematic diagram of a hub controller according to the present invention;
FIG. 4 is a schematic structural diagram of an adjusting mechanism according to the present invention.
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 accompanying drawings 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.
Referring to fig. 1 to 4, an online real-time monitoring and adjusting device for straightness of a composite pultrusion product comprises a monitoring mechanism arranged between an outlet of a die of the composite pultrusion product 8 and a tractor of the composite pultrusion product 8 and an adjusting mechanism 6 arranged on the front side of the tractor of the composite pultrusion product 8, wherein the monitoring mechanism comprises a base positioning block 4, a magnetic frame 13 and a dial indicator 5, the magnetic frame 13 is arranged on the base positioning block 4, the dial indicator 5 is arranged on the magnetic frame 13, the base positioning block 4 is fixedly arranged on an external bracket on the front side of the tractor of the composite pultrusion product 8 and plays a role of a main support to facilitate the installation of the magnetic frame 13 and the dial indicator 5, the magnetic frame 13 has certain magnetic force to facilitate quick magnetic attraction and fixation and realize quick installation of the dial indicator 5, in order to ensure the installation of the magnetic frame 13, a locking rod 14 can be additionally arranged on the magnetic frame 13, so as to ensure the firmness of installation;
the adjusting mechanism 6 comprises an adjusting bracket 7, and an adjusting roller matched with the composite material pultrusion product 8 and a power mechanism for driving the adjusting roller to move are arranged on the adjusting bracket 7; the power mechanism is used for driving the adjusting roller to move as required so as to adjust the position of the composite material pultrusion product 8, so that the straightness of the composite material pultrusion product 8 meets the requirement;
preferably, the power mechanism is a ball screw, a screw rod of the ball screw is rotatably mounted on the adjusting bracket 7, the adjusting roller is fixedly mounted on a nut of the ball screw, one end of the screw rod of the ball screw is also fixedly mounted with a hand-operated wheel 27, the screw rod can be rotated by rotating the hand-operated wheel 27, and then the position of the adjusting roller is adjusted by the nut;
preferably, the number of the adjusting rollers is 2, the adjusting rollers are a first adjusting roller 28 and a second adjusting roller 29, an adjusting gap matched with the composite material pultrusion product 8 is reserved between the 2 adjusting rollers, and the composite material pultrusion product 8 penetrates through the adjusting gap, so that the adjusting rollers are moved, and the composite material pultrusion product 8 can be moved.
The magnetic frame 13 comprises a magnetic base 16 with a magnetic switch 17, the base positioning block 4 is made of a magnetic conductive material, a magnetic support rod 23 is fixedly mounted on the magnetic base 16, a clamping support 24 is mounted on the magnetic support rod 23 through a clamping screw 20, and the dial indicator 5 is mounted on the clamping support 24 through a fastening screw 21. The magnetic base 16 is used for being adsorbed on the base positioning block 4 by utilizing the magnetic force effect, so that the fixing is convenient, and meanwhile, the magnetic base 16 controls whether the magnetic force exists or not through the magnetic switch 17, so that the position adjustment and the fixing are convenient; the position of the magnetic base 16 on the magnetic support rod 23 can be adjusted through the clamping screw 20, the position of the dial indicator 5 on the clamping support 24 can be adjusted through the clamping screw 21, and then the position of the dial indicator 5 can be adjusted conveniently, so that real-time monitoring can be carried out on the straightness of the composite pultrusion product 8 better.
The monitoring mechanism further comprises a control mechanism, the control mechanism comprises a controller 2 and a supporting platform 3 convenient for installation of the controller 2, the dial indicator 5 is a digital display dial indicator 5 with an RS485 data transmission function and comprises an indicator body 19 and a detection rod 22, an RS485 interface 18 is arranged on the indicator body, a detection head 31 is arranged at the end part of the detection rod, and the dial indicator 5 is connected with the input end of the controller 2. The detecting head 31 is used for abutting and contacting with the side surface 30 of the composite material pultrusion product 8 so as to measure the straightness of the composite material pultrusion product 8; the controller 2 is arranged and used for being matched with the dial indicator 5 to realize online real-time monitoring and adjustment of the straightness of the composite material pultrusion product 8, and preferably, the controller 2 selects a CPU or a PLC;
in order to conveniently fix all the dial indicators 5 and the controller 2, a line concentration controller 25 can be further arranged, and is integrated with an access power supply terminal and a data serial port 26, so that the dial indicators 5 and the controller 2 can be conveniently connected;
still install alarm lamp 1 on supporting platform 3, alarm lamp 1 is connected with the output of controller 2, and after controller 2 monitored the detection numerical value of percentage table 5 and exceeded the settlement scope, steerable alarm lamp 1 sent alarm signal, is convenient for in time adjust.
The monitoring mechanism is provided with 2, one monitoring mechanism is arranged in the middle between the outlet of the composite material pultrusion product 8 die and the composite material pultrusion product 8 traction machine, and the other monitoring mechanism is arranged at the position, close to the adjusting mechanism 6, of the front side of the traction machine. In the production process, when the online real-time monitoring numerical value alarms, the deviation can be corrected in time quickly through the numerical value of the rotating distance of the hand-operated wheel 27 of the adjusting mechanism 6, and the rotating distance of the hand-operated wheel 27 is carried out by referring to the display value of the dial indicator 5 of the monitoring mechanism close to the adjusting mechanism 6; the positions of the 2 monitoring mechanisms are shown in fig. 1, the first monitoring mechanism is arranged at a position close to the adjusting mechanism 6, as shown by a controller 2, an alarm lamp 1, a supporting platform 3, a base positioning block 4 and a dial indicator 5, and the second monitoring mechanism is arranged at the middle position of a composite material pultrusion product 8, as shown by a controller 11, a supporting platform 10, an alarm lamp 9, a base positioning block 12 and a dial indicator 15;
the dial indicator 5 of the monitoring mechanism close to the adjusting mechanism 6 can set the upper limit and the lower limit of the numerical value through the controller 2, and if the correction numerical value deviation of the hand wheel 27 is larger than the set value or smaller than the set range, the alarm lamp 1 can remind.
A composite material pultrusion product straightness accuracy online real-time monitoring and adjusting method comprises the following steps:
(1) arranging a detection mechanism between an outlet of a composite pultrusion product die and a composite pultrusion product tractor, enabling a probe of a dial indicator to be effectively parallel to the side face of a composite pultrusion product, and arranging an adjusting mechanism on the front side of the composite pultrusion product tractor;
(2) setting the dial indicator moving numerical value into the positive and negative value limits in the controller, and controlling an alarm lamp to send out an alarm signal when the numerical value exceeds the set numerical value;
(3) the pultrusion operation of the composite pultrusion product is started, the dial indicator monitors the straightness of the composite pultrusion product in real time, after the alarm lamp sends out an alarm signal, the position of the adjusting roller is adjusted through the hand wheel, and then the composite pultrusion product is moved, so that the alarm lamp stops alarming, and the straightness of the composite pultrusion product can meet the requirement.
In the step (2), the method for adjusting the positive value and the negative value of the dial indicator comprises the following steps: firstly, extending a detecting head of the dial indicator by the maximum length, centering the detecting head on the center of the side face of the composite material pultrusion product, then retracting the detecting head of the dial indicator to be half of the maximum length, and then contacting the side face of the composite material pultrusion product and centering the detecting head so as to clear the digital display dial indicator, and thus, data of positive values and negative values exist for the dial indicator;
if the maximum length distance that the detecting head of percentage table stretches out is 30mm, then the length distance that the detecting head of percentage table stretches out is 30mm earlier to be placed in the middle in compound material pultrusion product side central point, withdraw the detecting head of percentage table to 15mm length this moment and contact with compound material pultrusion product side and placed in the middle again, make the digital display percentage table zero clearing, just so to have the data of positive value and negative value to the detecting head, can effectively judge the direction and the distance of pultrusion product straightness accuracy skew.
Claims (9)
1. The utility model provides a online real-time supervision adjusting device of compound material pultrusion product straightness accuracy which characterized in that: the monitoring mechanism comprises a base positioning block, a magnetic frame and a dial indicator, wherein the magnetic frame is arranged on the base positioning block, and the dial indicator is arranged on the magnetic frame;
the adjusting mechanism comprises an adjusting bracket, and an adjusting roller matched with the composite material pultrusion product and a power mechanism for driving the adjusting roller to move are arranged on the adjusting bracket.
2. The online real-time monitoring and adjusting device for straightness accuracy of composite pultruded products according to claim 1, wherein: the magnetic rack comprises a magnetic base with a magnetic switch, a base positioning block is made of a magnetic conductive material, a magnetic supporting rod is fixedly mounted on the magnetic base, a clamping support is mounted on the magnetic supporting rod through a clamping screw, and a dial indicator is mounted on the clamping support through a fastening screw.
3. The online real-time monitoring and adjusting device for straightness accuracy of composite pultruded products according to claim 1, wherein: the monitoring mechanism further comprises a control mechanism, the control mechanism comprises a controller and a supporting platform convenient for installation of the controller, the dial indicator is a digital display dial indicator with an RS485 data transmission function, and the dial indicator is connected with the input end of the controller.
4. The online real-time monitoring and adjusting device for straightness accuracy of composite pultrusion products of claim 3, wherein: an alarm lamp is further installed on the supporting platform and connected with the output end of the controller.
5. The online real-time monitoring and adjusting device for the straightness of the composite pultruded product according to claim 1, wherein: the power mechanism is a ball screw, a screw rod of the ball screw is rotatably installed on the adjusting bracket, the adjusting roller is fixedly installed on a nut of the ball screw, and a hand-operated wheel is fixedly installed at one end of the screw rod of the ball screw.
6. The online real-time monitoring and adjusting device for the straightness of the composite pultruded product according to claim 5, wherein: the number of the adjusting rollers is 2, and an adjusting gap matched with the composite material pultrusion product is reserved between the 2 adjusting rollers.
7. The online real-time monitoring and adjusting device for straightness accuracy of composite pultruded products according to claim 1, wherein: the monitoring mechanism is provided with 2, one monitoring mechanism is arranged in the middle between the composite pultrusion product die outlet and the composite pultrusion product tractor, and the other monitoring mechanism is arranged at the position, close to the adjusting mechanism, of the front side of the tractor.
8. The on-line real-time monitoring and adjusting method for the straightness accuracy of composite pultrusion products is characterized by comprising the following steps of: the method uses the composite material pultrusion product straightness on-line real-time monitoring and adjusting device as defined in any one of claims 1 to 7, and comprises the following steps:
(1) arranging a detection mechanism between an outlet of a composite pultrusion product die and a composite pultrusion product tractor, enabling a detection head of a dial indicator to be effectively parallel to the side face of a composite pultrusion product, and arranging an adjusting mechanism on the front side of the composite pultrusion product tractor;
(2) setting the dial indicator moving numerical value into the positive and negative value limits in the controller, and controlling an alarm lamp to send out an alarm signal when the numerical value exceeds the set numerical value;
(3) the pultrusion operation of the composite pultrusion product is started, the dial indicator monitors the straightness of the composite pultrusion product in real time, after the alarm lamp sends out an alarm signal, the position of the adjusting roller is adjusted through the hand wheel, and then the composite pultrusion product is moved, so that the alarm lamp stops alarming, and the straightness of the composite pultrusion product can meet the requirement.
9. The online real-time monitoring and adjusting method for the straightness accuracy of the composite material pultrusion product, which is characterized by comprising the following steps of: in the step (2), the method for adjusting the positive value and the negative value of the dial indicator comprises the following steps: firstly, a detecting head of the dial indicator extends out to the maximum length, and is centered at the center of the side face of the composite material pultrusion product, then the detecting head of the dial indicator retracts to the half of the maximum length, and contacts the side face of the composite material pultrusion product and is centered, so that the digital display dial indicator is cleared, and data of positive values and negative values exist in the dial indicator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210122584.4A CN114543637A (en) | 2022-02-09 | 2022-02-09 | Online real-time monitoring and adjusting device and method for straightness of composite pultrusion product |
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| CN202210122584.4A CN114543637A (en) | 2022-02-09 | 2022-02-09 | Online real-time monitoring and adjusting device and method for straightness of composite pultrusion product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117484922A (en) * | 2023-11-06 | 2024-02-02 | 新创碳谷集团有限公司 | High-speed stable mass production method of demolding-free cloth pultruded panel |
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| CN117484922A (en) * | 2023-11-06 | 2024-02-02 | 新创碳谷集团有限公司 | High-speed stable mass production method of demolding-free cloth pultruded panel |
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