Rolling Components Research Articles

Head rotations follow those of a truncated Fick gimbal during an auditory guided visual search task.

Recent interest in dynamic sound localisation models has created a need to better understand the head movements made by humans. Previous studies have shown that static head positions and small oscillations of the head obey Donders' law: for each facing direction there is one unique three-dimensional orientation. It is unclear whether this same constraint applies to audiovisual localisation, where head movement is unrestricted and subjects may rotate their heads depending on the available auditory information. In an auditory guided visual search task, human subjects were instructed to localise an audiovisual target within a field of visual distractors in the frontal hemisphere. During this task, head and torso movements were monitored using a motion capture system. Head rotations were found to follow Donders' law during search tasks. Individual differences were present in the amount of roll that subjects deployed, though there was no statistically significant improvement in model performance when including these individual differences in a gimbal model. The roll component of head rotation could therefore be predicted with a truncated Fick gimbal, which consists of a pitch axis nested within a yaw axis. This led to a reduction from three to two degrees of freedom when modelling head movement during localisation tasks.

Investigation on the thermal characteristics of double-driven hydrostatic lead screw micro-feed system

The micro-feed system of the dual-drive hydrostatic lead screw (DDHLS) can overcome the accuracy limitations inherent in traditional hydrostatic lead screw through the process of differential synthesis, thereby achieving exceedingly low speeds and exceptional precision in feed operations. Nevertheless, due to the complex structural form of DDHLS, both heat generation and heat dissipation are different from conventional hydrostatic functional components. Therefore, for DDHLS micro-feed system, it is necessary to deeply investigate its thermal performance and evolution rules to improve its thermal stability. Based on the analysis of multi-field coupling, the accurate thermal model of the DDHLS micro-feed system is formulated. Taking into account the variable viscosity of the oil film and the heat dissipation conditions within the oil film region, the thermal behavior of DDHLS feed system is analyzed systematically. The accuracy of the thermal performance model of DDHLS feed system is verified by experiments. The findings indicate that the DDHLS micro-feed system has better thermal performance than the dual-axis differential feed system based on rolling components. Furthermore, optimizing the heat dissipation pathway of the DDHLS can significantly mitigate the thermal effects exerted by the hydrostatic nut assembly on the screw.

Effect of Early Intervention on Post Tracheostomy Infants on Developmental Delay

Background: In the pediatric population, tracheostomy is most common to provide good ventilator support, andthat too is most commonly performed in the infant population. Tracheostomy is frequently associated with devicessuch as ventilators, which can further interrupt the neck motion and this in turn, may also affect the gross motordevelopment.Purpose: To determine the effectiveness of early intervention in post-tracheostomy infants with developmentaldelays.Materials and Methods: A randomized control trial was conducted with a total of 20 tracheostomy infants with amean age of 2 months. Subjects were randomized into the early intervention group (n = 10) and the conventionalgroup (n = 10). Both groups were treated with routine chest care in the Pediatric Intensive Care Unit. In addition,the early intervention group included neck postural and movement activities for 20 minutes per day for 5 daysfor 4 weeks.Results: One outcome concentrated on neck control by using a clinical rating scale for head control (HCS), andanother outcome concentrated on gross motor milestones (lying and rolling components) by using the GrossMotor Functional Measure (GMFM-88). Both groups were similar at baseline, with a p-value of 0.8493 in HCS and0.56866 in GMFM. Following improvement in head control, the GMFM score improves from 29% to 74% in theconventional group. Early intervention groups progressed from 25% to 89%.Conclusion: Early intervention programs concentrated on post-tracheostomy infants showed significantimprovement in the development of neck control and rolling. And organized head movement in space was notedwhen compared to conventional groups.

Principle of fundamental resonance in hypersonic boundary layers: an asymptotic viewpoint

The fundamental resonance (FR) in the nonlinear phase of the boundary-layer transition to turbulence appears when a dominant planar instability mode reaches a finite amplitude and the low-amplitude oblique travelling modes with the same frequency as the dominant mode, together with the stationary streak modes, undergo the strongest amplification among all the Fourier components. This regime may be the most efficient means to trigger the natural transition in hypersonic boundary layers. In this paper, we aim to reveal the intrinsic mechanism of the FR in the weakly nonlinear framework based on the large-Reynolds-number asymptotic technique. It is found that the FR is, in principle, a triad resonance among a dominant planar fundamental mode, a streak mode and an oblique mode. In the major part of the boundary layer, the nonlinear interaction of the fundamental mode and the streak mode seeds the growth of the oblique mode, whereas the interaction of the oblique mode and the fundamental mode drives the roll components (transverse and lateral velocity) of the streak mode, which leads to a stronger amplification of the streamwise component of the streak mode due to the lift-up mechanism. This asymptotic analysis clearly shows that the dimensionless growth rates of the streak and oblique modes are the same order of magnitude as the dimensionless amplitude of the fundamental mode $(\bar {\epsilon }_{10})$ , and the amplitude of the streak mode is $O(\bar {\epsilon }_{10}^{-1})$ greater than that of the oblique mode. The main-layer solution of the streamwise velocity, spanwise velocity and temperature of both the streak and the oblique modes become singular as the wall is approached, and so a viscous wall layer appears underneath. The wall layer produces an outflux velocity to the main-layer solution, inclusion of which leads to an improved asymptotic theory whose accuracy is confirmed by comparing with the calculations of the nonlinear parabolised stability equations (NPSEs) at moderate Reynolds numbers and the secondary instability analysis (SIA) at sufficiently high Reynolds numbers.

Improvement of inverse dispersion technique for ground roll attenuation in sedimentary environment

Ground roll, often characterized as high energy, low velocity, low frequency and dispersion, which always dominates a large part of shot records and damages the desired reflections. The attenuation of ground roll is important for high data resolution and signal to noise ratio (S/N) in seismic processing. Conventional frequency-wave number (F-K) filter is effective in eliminating linear noise, but they do not deal well with appearance linear noise, like dispersive fan-shape ground roll. In the F-K domain, the components of ground roll and the desired reflection always overlap, which leads to destruction of the low-frequency components during the F-K filtering process. A novel inverse dispersion method is introduced to overcome this disadvantage. The proposed method transforms dispersive ground roll towards non-dispersive, high velocity linear noise. The time delay caused by dispersion is calculated and compensated by using an inverse dispersion operator. Then the ground roll is separated from the desired reflections and can be easily subtracted by the F-K filter. The conventional f-k filter can efficiently attenuate the ground roll without affecting the desired data, thus improve the resolution and S/N of seismic data. Model test and real data application demonstrate the feasibility and efficiency of the proposed method in ground roll attenuation.

Effect of variation of cold-rolling strain-paths on the microstructure, texture and mechanical properties of alloy Ni-16Cr-8Fe

In this work, the effect of variation of cold-rolling strain-paths (one-directional (U), two-stage cross (T), and multi-stage cross (M) rolling) on the evolution of microstructure as well as texture and their correlation with mechanical properties of alloy Ni-16Cr-8Fe has been studied. The overall texture strengthens while increasing rolling reductions from 30-to-50 and 50-to-90 % in all the strain-paths. In U strain-path, two of the standard rolling components—copper and brass—are strengthened significantly, while in T and M strain-paths only brass component strengthens. The overall texture has strong relationship with the brass-component of β-fibre irrespective of the strain-paths used during cold-rolling. The strain-path plays an important role in the changeover of texture from metal- to alloy-type, unlike what was previously thought that lowering of alloy’s stacking fault energy is the only reason. The yield (σYS) and tensile (σUTS) strength of 90 % rolled samples are significantly higher in U as compared to T and M strain-paths. The flow curves of 90 % rolled alloy follow Ludwigson-relationship with negative deviation in all the strain-paths. Regardless of the strain-paths, the area of yield locus ellipse increases as the rolling reductions are increased from 30-to-50 and 50-to-90 % and bear a good relationship with the overall texture. The average in-plane anisotropy in yield stress is observed to be highest in U strain-path. The theory of relative resolved shear stress of fcc slip systems in presence of highest intensity texture component well explains the variation in the values of in-plane anisotropies.

Design and development of high precision four roll CNC roll bending machine and automatic control model

In recent years, advancements in industries such as aerospace, military weaponry, automobiles, locomotives, and shipbuilding have led to a surge in the demand for bent and rolled components, along with increasingly stringent requirements for rolling precision. However, the traditional hydraulic cylinder feeding solution has hindered further enhancements in the accuracy of rolled profile contours. Additionally, owing to variations in profile specifications, material properties, and an assortment of random factors during the forming process, the applicability of existing forming formulas remains limited, rendering them suitable only for profile processing under specific circumstances. To address these challenges, servo electric cylinders have been introduced as a replacement for traditional hydraulic cylinders, and the mechanical structure of a four-roll bending machine has been re-engineered. This innovation has demonstrated the feasibility of employing servo electric cylinders in four-roll CNC bending machines for profile bending, resulting in higher control precision and faster response times, ultimately providing a comprehensive design solution for four-roll CNC bending machines. In response to the limited universality of existing forming formulas, the actual R (profile forming curvature) and d (servo electric cylinder feed) values from the four-roll CNC bending machine have been utilized, and curve fitting methods have been implemented as the foundation for the automatic control model. This approach offers a high degree of universality, making it suitable for a wide range of applications. Moreover, as the number of trials increased, forming precision progressively improved.

Strategi Penjadwalan Penggantian Roll Pada Mesin Rolling Mill Di PT. Z

PT. Z is one of the companies that produces steel plates located in Surabaya, East Java. Production process at PT. The Z fully uses machines that operate 24 hours a day. The bottleneck in the steel plate production process is that there are often breakdowns caused by people, machines, and materials. In the engine factor, there is often a machine breakdown that makes production stop. The smooth running of the production process is disrupted due to damage to the production machine. High downtime often occurs due to repairs and replacement of components in certain machine parts. Therefore the machine needs maintenance / maintenance (maintenance). Among all production machines, rolling mill machines are the machines with the highest downtime rates. The components in the rolling mill machine that cause the highest downtime of 12,851 minutes are roll components. This study intends to make a scheduling plan for roll replacement on rolling mill machines. The methodology used in this study is Preventive Maintenance by calculating its reliability and making a schedule for replacing and maintaining the machine. The results showed that the average roll replacement every 6 days with 63.21% reliability, and the average roll replacement process time was 131 minutes.

Perencanaan Jadwal Perawatan Komponen Mesin Roll Forming Baja Ringan Untuk Meminimumkan Biaya Perawatan

PT. Nadha Karya Utama Indonesia, a company engaged in the manufacturing service industry that produces mild steel, located on Jl. Cold Hamlet, RT 04 RW 07, Ngronggot, Kab. Nganjuk, East Java. The purpose of this study is to plan the Roll Forming machine maintenance schedule in order to minimize maintenance costs. The method used in this study is using the Preventive Maintenance method. The calculation results obtain the reliability value of each component on the Roll Forming machine, namely 0.5 for the reliability of the Roll component, 0.5 for the Gear Box component, 0.5 for the Main Engine component, 0.46 for Bearings, and 0.5 for reliability Roll Stand. Determination of maintenance time intervals is based on Peventive Maintenance on Roll components for 37 days, Gear Boxes for 108 days, Main Machinery for 108 days, Bearings for 53 days, and Roll Stands for 146 days. Based on the calculation results, the total cost of maintenance before carrying out preventive with reliability is known to be Rp. 19,340,000, after carrying out preventive calculations with reliability is Rp. 13,120,139.10, it can be seen that before and after carrying out preventive calculations there is a difference in costs of Rp. 6,219. 860.9. From these results it is known that preventive maintenance can reduce the costs incurred by PT. Nadha Karya Utama Indonesia from before the Preventive Maintenance calculations were carried out.

Lasting alteration of spatial orientation induced by passive motion in rabbits and its possible relevance to mal de débarquement syndrome.

Mal de débarquement syndrome (MdDS) is a chronic disorder of spatial orientation with a persistent false sensation of self-motion, whose onset typically follows prolonged exposure to passive motion of a transport vehicle. Development of similar but transient after-sensations mimicking the exposed motion and associated postural instability, indicative of central vestibular adaptation, are common. The cause of MdDS is thought to be a subsequent failure to readapt to a stationary environment. However, vestibular plasticity pertinent to this illness has not been studied sufficiently. Because the rabbit's eye movement is sensitive to three-dimensional spatial orientation, characterizing maladaptation of the vestibulo-ocular reflex (VOR) induced in the animal may open an approach to understanding MdDS. Three rabbits underwent a series of 2-h conditioning with an unnatural repetitive motion that involved a complex combination of roll, pitch, and yaw movements in a head-based reference frame, consisting of periodic rolling in darkness in a frame of reference that rotated about an earth-vertical axis. Eye movement in three dimensions was sampled during the conditioning stimulus as well as during test stimuli before and up to several days after conditioning. During roll-while-rotating conditioning, the roll component of the VOR was compensatory to the oscillation about the corresponding axis, but the pitch component was not, initially prominently phase-leading the head pitch motion but subsequently becoming patently phase-delayed. Unidirectional yaw nystagmus, weak but directionally compensatory to the earth-vertical axis rotation, was seen throughout the period of conditioning. After conditioning, simple side-to-side rolling induced an abnormal yaw ocular drift in the direction that opposed the nystagmus seen during conditioning, indicating a maladaptive change in spatial orientation. The impact of conditioning appeared to be partially retained even after 1 week and could be partially reversed or cumulated depending on the rotation direction in the subsequent conditioning. The observed reversible long-term maladaptation of spatial orientation as well as the depth of knowledge available in relation to the vestibular cerebellar circuits in this species support the potential utility of a rabbit model in MdDS research.

Effects of Playometric and Circuit Training on Motor Educability’s Back Roll Component

The purpose of this research study was to study the effect of dynamic learning through plyometric and circuit training on the hip component. For this research study, 25 students from plyometric group, 25 from circuit group and 25 from controlled group of Sri Sathyasai Vidyalaya, Jamnagar have been selected as subjects. To measure gait, Johnson's forward gait test has been selected as the standard of measurement. (ANCOVA) test was applied to find out the differences between the means and LSD test was applied to test the significance at 0.05 level, the plyometric and circuit groups were found to be significantly more active than the control group.
 Abstract in Gujarati Language:
 આ સંશોધન અભ્યાસનો હેતુ પ્લાયોમેટ્રિક અને સર્કીટ તાલીમ દ્વારા ગત્યાત્મક શિક્ષણના પીછે ગબડ ઘટક પર થતી અસરનો અભ્યાસ કરવાનો હતો. આ સંશોધન અભ્યાસ માટે શ્રી સત્યસાંઈ વિદ્યાલય, જામનગરના પ્લાયોમેટ્રિક જૂથના 25, સર્કિટ જૂથના 25 અને નિયંત્રિત જૂથના 25 એમ કુલ 75 વિદ્યાર્થીઓને વિષયપાત્રો તરીકે પસંદ કરી પીછે ગબડ માપન માટે જોનસનની આગે ગબડ કસોટીની માપનના ધોરણ તરીકે પસંદ કરી આંકડાઓનું એકત્રિકરણ કરી ત્રણેય જૂથના પ્રાપ્તાંકો પર સહવિચરણ પૃથક્કરણ (ANCOVA) ટેસ્ટ લાગુ પાડી મધ્યકો વચ્ચેના તફાવતો જાણવા માટે LSD ટેસ્ટ લાગુ પાડી 0.05 કક્ષાએ સાર્થકતા ચકાસતાં પ્લાયોમેટ્રિક અને સર્કિટ જૂથોની પીછે ગબડ પ્રવૃત્તિ નિયંત્રિત જૂથ કરતાં વધુ સાર્થક જોવા મળી હતી.
 Keywords: પ્લાયોમેટ્રિક, રમતગમત, સર્કિટ તાલીમ

Assessment of the Roll Derivatives of Different Surface Ships Based on Numerical Pure Roll Simulation

Among the 6 degrees of freedom (6-DoF), excessive roll motion is the most dangerous cause of ships capsizing. However, when analyzing the maneuverability of surface ships, the roll components have usually been ignored. It is widely known that the influence of roll moment becomes significant for surface ships with low GM (metacentric height) and high speed. This paper examines the pure roll test for several surface ships to assess the roll-related hydrodynamic derivatives of added mass and damping in maneuvering. The objective ships are the KRISO Container Ship (KCS), David Taylor Model Basin (DTMB), Office of Naval Research Tumblehome (ONRT), and Delft 372 catamaran, where the DTMB and ONRT ships are equipped with complementary bilge keels as damping devices and have a small GM, which the Delft 372 catamaran does not have. The flow during pure roll is analyzed by the Computational Fluid Dynamics (CFD) simulation method that allows the complex flow around ships to be captured, especially when the bilge keel and skeg are considered. The results indicate that the roll moment is greatest in the catamaran. Since the roll moments of the DTMB and ONRT are larger than that of the KCS, bilge keels and surface shape also contribute to increasing roll damping moment. In addition, a comparison of the damping derivatives due to roll rate with results obtained from another method indicates that CFD simulation is capable of accurately predicting the roll-related derivatives, which is difficult to perform by the experiment method.

Combined classification models for bearing fault diagnosis with improved ICA and MFCC feature set

Earlier analysis of faults in machinery is widely analyzed, for maintenance and cost savings. Bearing faults and motorized imbalances are the larger faults in machinery, particularly for the machinery of smaller sized -medium. As a result, these analyses are widely analyzed in the field of research. Rolling component bearings are extensively deployed in rotating machinery and, simultaneously, they are simply scratched, which are owing to harsh working conditions and environments. Consequently, rolling component bearings are significant to the safer function of motorized devices. The main aim of this research is to diagnose bearing faults using deep learning algorithms. The bearing fault of machinery is identified based on the features extracted and represented by using several monitoring techniques. Framing a new fault diagnosis model includes 2 major phases. Initially, LPSE improved ICA and improved MFCC-based features are extracted. These features are then subjected to LSTM and ANN for the fine diagnosis of bearing faults. For exact diagnosis, this work aims to optimize the weights of LSTM and ANN using the Self Improved Salp Swarm Optimization (SI-SSO) model. In the end, the development of the deployed method is confirmed regarding miscellaneous metrics.

High-Rate Attitude Determination of Moving Vehicles With GNSS: GPS, BDS, GLONASS, and Galileo

We investigate the long-term performance and improvement of high-rate multiconstellation Global Navigation Satellite System (GNSS) or multi-GNSS attitude determination in a dynamical environment and evaluate how much each GNSS contributes to such an improvement with applications to land vehicle navigation. We build a multiantenna GNSS system with three nondedicated receivers and conduct two experiments with quad-constellations in GNSS-friendly and GNSS-challenged environments on January 19 and 23, 2018, respectively. A high-grade inertial measurement unit (IMU) provides a reference of comparison for dynamic attitude solutions. In the static case, the global positioning system (GPS), BeiDou navigation satellite system (BDS), and GLObal NAvigation Satellite System (GLONASS) single-constellation solutions have basically the same performance for both experiments. In the dynamic case, GPS achieves the best accuracy in the experiment on January 19, while on January 23, GPS and GLONASS achieve very similar accuracy and significantly outperform BDS in the pitch and roll components. The different dynamic performances of these single constellations are primarily attributed to their differences in observation noise level and satellite geometry strength. By combining GPS, BDS, GLONASS, and Galileo, the multi-GNSS solution performs significantly better than any single-constellation solution. The average improvements in the dynamic cases are 26.2%, 40.7%, and 36.0% on January 19 and 19.2%, 30.0%, and 36.2% on January 23 in the yaw, pitch, and roll components, respectively. The attitude solutions on January 19 are always better determined than on January 23 in the dynamic cases, which should clearly indicate the importance of combining multiple GNSS constellations and the benefit of more observed satellites and a stronger satellite geometry in GNSS-challenged environments. We also introduce the concept of “influence rate” and quantitatively analyze the contribution of each GNSS system to the combined attitude solution.

Analysis of vibration signature in deep groove ball bearing using finite element method

The most common kind of bearing is the rolling element bearing, which is a used mechanical component in rotating equipment that is subjected to heavy loads and rapid rotation. Bearing failure is the main consideration in the failure of rotating hardware. A deformity at any component of the bearing transmits to every single other component, for example, external race, inward race, ball, and retainer of the bearing. The simplest way to think about ball bearing failure examination is to create counterfeit cracks of varying sizes on various components of CATIA V-6 and write down their signatures. For this reason, the vibration investigation procedure which is dependable and precisely recognizing deformity in the bearing components is utilized. Estimation of the amplitude of vibrations is carried out at 5000 RPM, a load of 200 N, and at different deformity sizes, 3 mm and 4 mm on bearing races are carried out. A preparatory vibration investigation of a rolling component is carried out using Ansys R-18.0. Vibration signals for two diverse imperfection sizes have been extricated and a file for correlation of various deformity sizes has been proposed. The impacts of radial load, rotation speed, and starting deformity size on the stress level are studied.

Review on the Thermal Performance on the Basis of Different Types of Material used in Ball Bearings

Bearing is a movable object, so frictional forces must be overcome in terms of moving the Bearing. To decrease the friction force on the movable methodology, different kinds of bearings have been used. The bearing gets its characterized by the fact that it is used to support a rotating axle or shaft. Because rolling bearings utilize balls or rollers, they are referred to as "rolling components." one can measure bearing expected lifespan depending on the material exhaustion if one can understand the operations and maintenance of loads and speeds. These computations should be based on the assumption that now the bearing is appropriately installed, lubricated, and moreover treated. It is unable to account for the impact of detrimental operating environment. Damaged bearing has a significant economic and industrial implications. Numerous substance are used in the bearing sector to several bearing elements. To achieve maximum bearing performance and durability, the products are deposited to obtain intended characteristics. The components listed in this are the most frequently used. The different materials used in ball bearings are discussed in this paper.

Steady State Thermal Effect on Static Characteristic of Copper Roller Shaft

The static analysis of a copper roller shaft is performed. The copper roller shaft consists of bushing, pen roll and roller. All of those components g4bconsist of different materials. Thermal steady state and statical analysis is performed in order to investigate the thermal effect of high temperature copper slab on the roller shaft. The copper slab temperature is 1200 OC. Based on this work obtained that the maximum total deformation is 0.0050523 m, maximum equivalent stress is 41600 MPa, maximum life cycle is 1011, total heat flux maximum is 879910 W/m2 and the maximum damage occur in the pen roll component.

Improvement of the corrosion behavior of AISI 304L stainless steel by deep rolling treatment under cryogenic cooling

The effects of deep rolling parameters, particularly, work speed and cooling conditions (dry and cryogenic) on the surface integrity of AISI 304L machined samples and their further impact on uniform and localized corrosion behavior in chloride environment were experimentally investigated in this work. The electrochemical behavior of machined and deep rolled samples was assessed using cyclic potentiodynamic polarization tests in synthetic seawater. It was found that the corrosion behavior of AISI 304L deep rolled components is related to combined factors: surface roughness, recrystallized grains, strain-induced martensite, microhardness and residual stresses. Findings of this study exhibit that grain refinement generated in the surface layers leads to improved corrosion behavior of deep rolled specimens with regard to machining state. In addition, samples deep rolled at a speed of 25 m/min, without cooling, showed better corrosion resistance than those processed under cryogenic cooling. However, the application of cryogenic deep rolling at speeds of 75 and 120 m/min significantly enhanced the electrochemical behavior of mechanically treated specimens. Despite of high amounts of strain-induced martensite that can deteriorate the electrochemical behavior, it was shown that specimens deep rolled under these conditions, presenting better surface characteristics, depicted an improved corrosion resistance.

Rolling controls sperm navigation in response to the dynamic rheological properties of the environment.

Mammalian sperm rolling around their longitudinal axes is a long-observed component of motility, but its function in the fertilization process, and more specifically in sperm migration within the female reproductive tract, remains elusive. While investigating bovine sperm motion under simple shear flow and in a quiescent microfluidic reservoir and developing theoretical and computational models, we found that rolling regulates sperm navigation in response to the rheological properties of the sperm environment. In other words, rolling enables a sperm to swim progressively even if the flagellum beats asymmetrically. Therefore, a rolling sperm swims stably along the nearby walls (wall-dependent navigation) and efficiently upstream under an external fluid flow (rheotaxis). By contrast, an increase in ambient viscosity and viscoelasticity suppresses rolling, consequently, non-rolling sperm are less susceptible to nearby walls and external fluid flow and swim in two-dimensional diffusive circular paths (surface exploration). This surface exploration mode of swimming is caused by the intrinsic asymmetry in flagellar beating such that the curvature of a sperm's circular path is proportional to the level of asymmetry. We found that the suppression of rolling is reversible and occurs in sperm with lower asymmetry in their beating pattern at higher ambient viscosity and viscoelasticity. Consequently, the rolling component of motility may function as a regulatory tool allowing sperm to navigate according to the rheological properties of the functional region within the female reproductive tract.

55.6: Research on the Bonding Technology of SUS And Panel for Curling Screen

In recent years, with the rapid development of display technology, flexible folding screen technology has become a must for major smart phone manufacturers to introduce new ones. With the continuous subversion of the industrial design concept of mobile phones, and the continuous optimization of product design and user experience, a new wave of mobile phone design has arrived‐curling screens. The curling screen is a new type of rollable and stretchable screen derived from the folding screen. The shrinkage and expansion of the screen is achieved through the Rolling component. The realization of the rollable screen relies on its rollable SUS as a support, and its curling characteristics directly lead to The difficulty of SUS fitting has increased dramatically.This article will study the technology of the SUS and Panel bonding (M‐Lami) of the curled screen, aiming to improve the bonding effect of the M‐Lami process and solve the difficult problems of the process: Peeling, tearing film reverse release, curved edge GDS. Through the tearing point of the tear film (right‐angle apex, right‐angle point up, right‐angle point down), curved edge roller bonding pressure (0.20MPa, 0.25MPa, 0.3MPa, 0.4MPa), roller diameter (11mm, 13mm, 15mm), 15mm), roller hardness (30IRHD, 40IRHD, 50IRHD) and other conditions are comprehensively researched and analyzed, and it is concluded that the tearing point of the film is 3mm above the right angle point, the curved edge roller bonding pressure is 0.3MPa, the roller diameter is 13mm, the roller Under the condition of hardness of 50IRHD, it can solve the problems of M‐Lami process Peeling, tearing film reverse release and curved edge GDS to the greatest extent, and improve the yield of curled screen products.