RTR winding and unwinding constant tension section difference mechanism

Abstract

The invention relates to an RTR winding and unwinding segment difference mechanism, in particular to an RTR winding and unwinding constant tension segment difference mechanism. According to the technical scheme, the RTR winding and unwinding constant-tension segment difference mechanism comprises a segment difference structure, and two traction structures are arranged on the segment difference structure and include the tension segment difference traction structure and the balance segment difference traction structure. The automatic material pulling and storing device has the advantages that the problem of large product expansion and contraction fluctuation caused by existing rapid material pulling and storing can be solved, and the problems of rapid material pulling and transmission direction reversal and jerking in the lifting process due to the forward and backward movement time interval difference of a material belt are solved. Real constant tension control over roll-to-roll material pulling, sudden stop and sudden start, material storage and forward and backward movement of a material belt of an RTR roll is achieved, the product quality can be improved, and the stability and controllability of the manufacturing process can be improved.

Description

Technical Field

[0001] The invention relates to an RTR reel-winding and unwinding step difference mechanism, and in particular to an RTR reel-winding and unwinding constant tension step difference mechanism. Background Art

[0002] At present, the RTR roll-to-roll process is adopted in the FPC circuit board and other industries. This operation mode corresponds to many processes, because the RTR roll-to-roll production efficiency is higher, more stable, and the process is more controllable. However, there is a problem that has been bothering the RTR roll-to-roll process, that is, the expansion and contraction of the material. The material is a film material or a copper material (thin copper foil materials are divided into rolled copper and electrolytic copper) with a material thickness ranging from 0.036mm to 0.2mm. The characteristics of copper and film materials are ductile. This material will be stretched and elongated under the action of external force, which is what the industry calls the expansion and contraction problem. If the tension fluctuates within a fixed range, this stretching and shrinkage problem is not too much. If the tension on the copper foil material is not fixed, the tensile deformation of the material is not fixed and cannot be controlled. In this case, the material is also uncontrollable in the RTR roll-to-roll operation mode, which will cause poor product quality. At the same time, such problems will be more verified when the material is suddenly started and stopped.

[0003] The existing RTR roll-to-roll operation basically uses a step-difference structure or a tension sensor structure to maintain tension. However, the step-difference structure has weight. The step-difference wheel plus the fixing mechanism, the guiding mechanism and the friction force will fall down under the action of gravity. The greater the weight of the step-difference structure, the greater the pressure on the material. If the step-difference structure is pulled up by a motor, the rise and fall of the step-difference requires the direction of the motor to be switched. When the motor switches direction, the step-difference structure will shake or fail to instantly flip the step-difference, resulting in delays or jerks. This pause, jerks and jams will instantly affect the expansion and contraction of the material, resulting in the roll material product being unable to maintain a constant tension, and will instantly be tightened or relaxed. When tightened, the external force on the material will fluctuate again. Therefore, the existing step-difference structure cannot guarantee the constant tension of the material, which will cause the material to be instantly subjected to large or small forces during operation, resulting in material shaking, loose roll, expansion and contraction, and stretching problems. Another method is to use a tension sensor, ultrasonic sensor or displacement sensor to detect the expansion and contraction of the material. In this case, the material pulling action of emergency stop and emergency start cannot be used because the sensor and the motor cannot be synchronized with the material when starting and stopping, which will cause the rolled material to be pulled out or loosened instantly. Therefore, the existing structure cannot solve the problem of material product expansion and contraction and stretching caused by emergency stop and emergency start rolling long or short distance material pulling. Therefore, a new technical solution should be provided to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a RTR reel constant tension step difference mechanism to solve the problem of large fluctuations in product expansion and contraction caused by rapid material pulling and storage in the existing step difference structure, and solve the problem of transmission direction reversal and jitter during the lifting process of the step difference structure during rapid material pulling and forward and backward movement of the material belt. Thus, real constant tension control can be achieved during RTR roll-to-roll material pulling, emergency stop and start, material storage, and forward and backward movement of the material belt.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A RTR rewinding and unwinding constant tension step difference mechanism, comprising a step difference structure, wherein the step difference structure is provided with two sets of traction structures, wherein the two sets of traction structures are respectively a tension step difference traction structure and a balance step difference traction structure, wherein the step difference structure comprises a step difference roller and a step difference roller assembly fixed on a roller shaft, wherein the tension step difference traction structure comprises two symmetrically arranged tension step difference traction belts, a tension step difference top pulley, a tension step difference bottom pulley, a tension step difference shaft, a tension step difference driving assembly, two symmetrically arranged tension step difference guide rails, a tension step difference guide slider, and tension step difference on both sides The material transfer roller, the tension step difference top pulley and the tension step difference bottom pulley are respectively arranged at the top and bottom of the tension step difference traction belt, the two ends of the tension step difference shaft respectively pass through the tension step difference bottom pulleys on the two tension step difference traction belts, and the ends thereof are fixedly connected to the tension step difference driving assembly, the tension step difference guiding slider is slidably arranged on the tension step difference guiding slide rail, and the tension step difference guiding slider is connected to the tension step difference traction belt on the same side through a connecting block, and the two ends of the roller shaft of the step difference roller assembly are fixedly connected to the tension step difference guiding slider on the same side through a fixing member;

[0007] The balanced step-difference traction structure includes a balanced step-difference traction belt, a balanced step-difference top pulley, a balanced step-difference bottom pulley, a balanced step-difference linear bearing assembly and a balanced step-difference drive assembly. The balanced step-difference top pulley and the balanced step-difference bottom pulley are respectively arranged on the top and bottom of the balanced step-difference traction belt, and the balanced step-difference bottom pulley is connected to the output shaft of the balanced step-difference drive assembly. The balanced step-difference traction belt is connected to the tension step-difference guide slider on the same side thereof through a connecting block. The bearing body of the balanced step-difference linear bearing assembly passes through the center hole of the connecting block, and its upper and lower ends are supported and fixed by bearing seats.

[0008] The further technical solution is:

[0009] The tension step-difference driving assembly and the balance step-difference driving assembly are both transmission motors connected to a reducer.

[0010] Further technical solutions:

[0011] It also includes a fixed reinforcement member, both ends of which are respectively fixed to the connecting blocks of the tension step difference guiding sliders on both sides.

[0012] The RTR rewinding and unwinding constant tension step difference mechanism provided by the present invention has the following beneficial effects compared with the prior art:

[0013] 1. The RTR rewinding and unwinding constant tension step difference mechanism of the present invention has two groups of traction structures arranged on the step difference structure. One group of traction structures is used to balance the deadweight of the step difference structure and apply a reverse pulling force to the step difference so that the step difference roller can stop at any position, that is, the deadweight of the step difference, bearing and slider mechanism is eliminated. The other group of traction mechanisms applies a downward pulling force to the step difference structure to tighten the product, which can solve the problem of large fluctuations in product expansion and contraction caused by existing rapid material pulling and material storage, and solve the problem of transmission direction reversal and jitter during rapid material pulling and the time difference lifting and lowering process when the material belt moves forward and backward. It realizes the real constant tension control during RTR roll-to-roll material pulling, emergency stop and start, material storage, and forward and backward movement of the material belt.

[0014] 2. The RTR rewinding and unwinding constant tension step difference mechanism of the present invention can achieve constant tension in both the set tension and the actual tension output, which can reduce the stretching, extension, expansion and contraction of the roll material caused by the step difference switching direction or the emergency stop and start. This can improve the quality of the product and the stability and controllability of the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the side structure.

[0018] Among them, 1000, tension step difference traction structure, 1001, tension step difference traction belt, 1002, tension step difference top pulley, 1003, tension step difference bottom pulley, 1004, tension step difference shaft, 1005, tension step difference drive assembly, 1006, tension step difference guide rail, 1007, tension step difference guide slider, 1008, tension step difference both sides of material transfer rollers, 1009, fixed reinforcement, 1010, step difference roller assembly, 2000, balanced step difference traction structure, 2001, balanced step difference traction belt, 2002, balanced step difference top pulley, 2003, balanced step difference bottom pulley, 2004, balanced step difference linear bearing assembly, 2005, balanced step difference drive assembly. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or location relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] As the first embodiment of the present invention, the present invention provides an RTR rewinding and unwinding constant tension step difference mechanism, including a step difference structure, on which two groups of traction structures are provided, the two groups of traction structures are respectively a tension step difference traction structure 1000 and a balance step difference traction structure 2000, the step difference structure includes a step difference roller and a step difference roller assembly 1010 fixed on the roller shaft, the tension step difference traction structure 1000 includes two symmetrically arranged tension step difference traction belts 1001, a tension step difference top pulley 1002, a tension step difference bottom pulley 1003, a tension step difference shaft 1004, a tension step difference drive assembly 1005, two symmetrically arranged tension step difference guide rails 1006, and a tension step difference guide slider. 1007 and the material transfer rollers 1008 on both sides of the tension step difference, the tension step difference top pulley 1002 and the tension step difference bottom pulley 1003 are respectively arranged at the top and bottom of the tension step difference traction belt 1001, and the two ends of the tension step difference shaft 1004 respectively pass through the tension step difference bottom pulleys on the two tension step difference traction belts, and the ends thereof are fixedly connected to the tension step difference driving assembly, the tension step difference guiding slider 1007 is slidably arranged on the tension step difference guiding rail 1006, and the tension step difference guiding slider 1007 is connected to the tension step difference traction belt 1001 on the same side through a connecting block, and the two ends of the roller shaft of the step difference roller assembly are fixedly connected to the tension step difference guiding slider 1007 on the same side through fixings;

[0022] The balanced step-difference traction structure 2000 includes a balanced step-difference traction belt 2001, a balanced step-difference top pulley 2002, a balanced step-difference bottom pulley 2003, a balanced step-difference linear bearing assembly 2004, and a balanced step-difference driving assembly 2005. The balanced step-difference top pulley 2002 and the balanced step-difference bottom pulley 2003 are respectively arranged at the top and bottom of the balanced step-difference traction belt 2001, and the balanced step-difference bottom pulley 2003 is connected to the output shaft of the balanced step-difference driving assembly 2005. The balanced step-difference traction belt 2001 is connected to the tension step-difference guide slider 1007 on the same side thereof through a connecting block. The bearing body of the balanced step-difference linear bearing assembly 2004 passes through the center hole of the connecting block, and the upper and lower ends thereof are supported and fixed by the bearing seat. When working, when the balanced step-difference traction structure 2000 pulls the step-difference structure, the bearing assembly 2004 plays a supporting and guiding role to ensure the stability and continuity of the step-difference structure.

[0023] Preferably, as the second embodiment of the present invention, this embodiment is a further improvement of the first embodiment. The balanced step-difference driving component 2005 is a transmission motor connected to a reducer. Of course, the driving component is not limited to the reduction motor, and a torque motor, a magnetic powder plus motor, a counterweight block and other modes can also be used to apply a reverse pulling force to the step-difference structure, so that the step-difference roller can stop at any position, that is, the self-weight of the step-difference structure and the bearing, the slider assembly, etc. is eliminated. In addition, the tension step-difference driving component 1005 is also a transmission motor connected to a reducer. Of course, it is not limited to the reduction motor, and a torque motor, a magnetic powder plus motor mode can also be used to achieve it. At this time, a standard tension can be set for the magnetic powder or the motor to tighten the product. This torque tension is a constant tension. The material will be pulled up or down under the fixed tension during the feeding and traction time difference. Always straighten and tighten the product material.

[0024] Preferably, as the third embodiment of the present invention, this embodiment is a further improvement on the first embodiment. The RTR rewinding and unwinding constant tension step difference mechanism of the present invention also includes a fixed reinforcement member, which is a plate-shaped or stick-shaped long strip reinforcement rib, and its two ends are respectively fixed on the connecting blocks of the tension step difference guide sliders on both sides to enhance the strength and stability of the step difference structure during operation.

[0025] In the above embodiments, both traction mechanisms are implemented by traction belts in conjunction with pulleys. Of course, the actuators may also be implemented by synchronous belts, steel wire ropes, non-metallic ropes and other actuators.

[0026] The working process and action principle of the present invention are as follows:

[0027] The principle of this invention is: the weight and friction of the material storage structure and the structure are eliminated by using the balanced step-difference traction structure 2000 series numbered components. According to the weight of different step-difference structures, a reverse force is applied to the traction belt of the balanced step-difference traction structure to pull the step-difference roller in the opposite direction to offset the weight and friction of the step-difference structure, so that the tension step-difference traction structure 1000 series numbered components without external force can stop at any position at any time. Under normal conditions, the step-difference structure will fall freely after being pulled up, and the purpose of this structure is to solve the problem of the weight of the step-difference roller structure.

[0028] After the balanced step-difference traction structure 2000 series numbered parts offset the deadweight balance of the storage step-difference mechanism, the tension step-difference traction structure 1000 series numbered parts can be set by setting a fixed tension condition, or by using real-time feedback from the tension controller to set the tension. At this time, the transmission output mechanism of this part can use a torque motor, a servo motor torque mode, or a magnetic powder plus motor structure to achieve constant tension control. And this control direction only needs to give the step-difference roller a downward force. Even if the required tension value is less than the deadweight of the step-difference roller, there is no need for the step-difference drive component of the tension step-difference traction structure 1000 series to switch the direction of the force, thereby achieving unidirectional output of the drive component and ensuring the constant tension of the step-difference roller (the common structure is to use the direction of the switching drive mechanism to achieve the rise and fall of the step-difference roller. This method will cause a delay in switching, and the step difference cannot keep up with the speed of the traction and pulling of the material, and the material moves back and forth, which will cause the product belt to shake, jam, and other problems, resulting in abnormal product quality).

[0029] When working, the 2000 series numbered parts of the balanced step-difference traction structure pull the step-difference structure upward, so that the step-difference roller cannot fall freely without external force. Therefore, the 2000 series of balanced step-difference traction structures always exert force in one direction, and there is no need to switch the transmission direction, so there will be no setbacks, jams and other problems. The 1000 series of tension step-difference traction structures pull the step-difference roller mechanism downward. At this time, the torque of the 1000 series transmission structure comes from the set standard value (such as 1kg-20kg, etc.) or the real-time RTR roll material tension monitored by the tension sensor, controller, ultrasonic sensor, laser displacement sensor and other detection mechanisms. The real-time monitored tension is fed back to the transmission actuator of the 1000 series of tension step-difference traction structure, so that the 1000 series transmission actuator adjusts the transmission torque according to the change of tension, so as to achieve the purpose of constant tension. Therefore, the transmission actuator of the 1000 series of tension step-difference traction structure also always exerts force in one direction, and there is no need to switch the transmission direction, so there will be no setbacks, jams and other problems of the step-difference transmission mechanism.

[0030] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A RTR rewinding and unwinding constant tension step difference mechanism, characterized by: The invention comprises a step difference structure, wherein the step difference structure is provided with two groups of traction structures, wherein the two groups of traction structures are respectively a tension step difference traction structure (1000) and a balance step difference traction structure (2000), wherein the step difference structure comprises a step difference roller and a step difference roller assembly (1010) fixed on a roller shaft, wherein the tension step difference traction structure (1000) comprises two symmetrically arranged tension step difference traction belts (1001), a tension step difference top pulley (1002), a tension step difference bottom pulley (1003), a tension step difference shaft (1004), a tension step difference driving assembly (1005), two symmetrically arranged tension step difference guiding slide rails (1006), a tension step difference guiding slider (1007) and material transfer rollers (1010) on both sides of the tension step difference. 1008), the tension step difference top pulley (1002) and the tension step difference bottom pulley (1003) are respectively arranged at the top and bottom of the tension step difference traction belt (1001), the two ends of the tension step difference shaft (1004) respectively pass through the tension step difference bottom pulleys on the two tension step difference traction belts, and the ends thereof are fixedly connected to the tension step difference driving assembly, the tension step difference guiding slider (1007) is slidably arranged on the tension step difference guiding slide rail (1006), and the tension step difference guiding slider (1007) is connected to the tension step difference traction belt (1001) on the same side through a connecting block, and the two ends of the roller shaft of the step difference roller assembly are fixedly connected to the tension step difference guiding slider (1007) on the same side through a fixing member; The balanced step-difference traction structure (2000) comprises a balanced step-difference traction belt (2001), a balanced step-difference top pulley (2002), a balanced step-difference bottom pulley (2003), a balanced step-difference linear bearing assembly (2004) and a balanced step-difference driving assembly (2005); the balanced step-difference top pulley (2002) and the balanced step-difference bottom pulley (2003) are respectively arranged at the top and bottom of the balanced step-difference traction belt (2001); the balanced step-difference bottom pulley (2003) is connected to the output shaft of the balanced step-difference driving assembly (2005); the balanced step-difference traction belt (2001) is connected to a tension step-difference guiding slider (1007) on the same side thereof through a connecting block; the bearing body of the balanced step-difference linear bearing assembly (2004) passes through the central hole of the connecting block, and its upper and lower ends are supported and fixed by a bearing seat.

2. According to claim 1, a constant tension step difference mechanism for RTR rewinding and unwinding, characterized in that: The tension step-difference driving assembly (1005) and the balance step-difference driving assembly (2005) are both transmission motors connected to a reducer.

3. The RTR rewinding and unwinding constant tension step difference structure according to claim 1, characterized in that: It also includes a fixed reinforcement member (1009), the two ends of which are respectively fixed to the connection blocks of the tension step difference guide sliders on both sides.

Images