Analysis of winding tension of loop winding machine

heading_title

    Analysis of winding tension of loop winding machine

                 Toroidal winding machine-Toroidal coil winding machine-Enameled wire is wound radially on the closed toroidal structure (for details, please refer to the toroidal winding machine tutorial): With the rapid development of the domestic power industry, the demand for current transformer coils Increasingly, the development of current transformer coil winding equipment is imminent. In order to meet the needs of the market, we have developed a current transformer toroidal coil winding machine based on imported equipment. During the design and testing process, we found that, The key to the design of toroidal winding machine is the control of winding tension.

    

     This automatic winding machine is composed of a frame, a pay-off mechanism, a winding head, a tape head, a clamping device, and a control system.

     loop winding machine, automatic winding machine,

    1, the working principle of toroidal winding machine

Firstly, the wires are evenly wound on the wire storage ring, and then the wires wound on the wire storage ring are wound on the skeleton by a shuttle. The skeleton is driven by the servo motor to rotate, so that the wires are evenly arranged on the skeleton when the wire is wound to a certain amount , And then wind the tape on the frame through the wire storage ring, and then wind it.

    2, analysis of winding tension

     Through our continuous practice, we have discovered that during the entire winding process, using appropriate force to wind the wire tightly on the skeleton is the key to the quality of the winding. Therefore, we will focus on the factors that affect the winding tension.

     1. The grinding moment of the rotating part of the thread bobbin

     2. The moment of inertia caused by the acceleration of the thread bobbin part (including the wire wrapped in the bobbin).

    The main part of the frictional torque is generated by the tension mechanism, which prevents the wire shuttle from moving and tightens the wire to generate winding tension.

Due to the influence of the winding ring surface and its deviation from the center position in the winding gear, even if the winding is at a constant speed, the movement speed of the thread shuttle is small and uniform, which generates the moment of inertia caused by acceleration, which affects the winding tension.


The movement speed of the thread shuttle can be regarded as composed of two speeds: one is the speed Vo equal to the speed of the pulley on the winding gear, and the other is the speed at which the thread shuttle releases the amount of wire. The former is a constant, and the latter is calculated as follows ( see picture 1)

     loop winding machine winding tension analysis 1

     So in order to reduce the acceleration of the thread bobbin, it is required:

     1. The frame profile H should be small, and the profile should be as close as possible to the center of the winding gear, that is, the value of 1 should be small.

     2. The thread hook flat diameter R should be as small as possible.

     3. The winding speed ω cannot be too high (this is in conflict with improving production efficiency).

    The approximate curve of the speed Vx and acceleration а of the mountain thread shuttle is obtained by the graphical method, and the description is as follows (see Figure 2 and Figure 3):

     loop winding machine winding tension analysis 2

     1. When the small pulley on the winding gear is at the 0° position, the speed of the thread shuttle is equal to the speed of the small pulley V0, when the speed of the thread shuttle gradually increases from 0-60°, there is a positive acceleration at this time. =600-180`) when the thread shuttle moves at a constant speed, the speed is Vm>Vo. When а=180°~263°, the speed of the thread shuttle gradually decreases. At this time, there is a negative acceleration a = 263°. The speed of the thread shuttle is equal to the pulley speed V. When а=263°~345°, the speed of the thread shuttle continues to decrease. Small, that is, it is lower than V and has a negative acceleration. When а=345°, the speed of the thread shuttle is the minimum Vo, when а=345°~360°, the speed of the thread shuttle increases gradually and there is a positive acceleration.

     2. When the winding gear rotates at a constant speed, the speed of the thread shuttle will be zero if it is small, so the friction tension mechanism always acts as a brake to keep the wire tensioned.

     3. If Vp is the average linear velocity of the thread bobbin; Vo is the linear velocity of the pulley on the winding gear; L is the perimeter of the wire of the potentiometer, then

4. When the winding speed ω is not large: the wire bobbin diameter R is small, and the potentiometer profile size H is also small. When the profile is as close as possible to the center of the winding gear, the acceleration change is small and large, and the inertia caused by the acceleration The torque is much smaller

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       With the rapid development of science and technology and electronic application technology, the requirements for technical indicators such as the rated primary voltage and accuracy of voltage transformers are getting higher and higher, and the demand for various types of voltage transformers is increasing. In the past, voltage transformers were mostly manually wound with annular iron cores and thick enameled wires. The products were large and heavy. In the daily winding, processing and production process, the degree of mechanization was not high, the labor intensity of workers was high, and the production efficiency was low. It is necessary to improve the voltage transformer design process and develop a new type of mechanical equipment for winding the voltage transformer.

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         As shown in the figure below, it is a sensor coil used in the medical industry. The skeleton is made of aluminum. The diameter of the enameled wire is 0.1mm. The customer requires the arrangement to be neat and free of winding defects. The company has carefully evaluated the specific requirements of the customer, because the winding process and winding are considered. After the completion of the structure, the self-adhesive enameled wire process was adopted, and the self-adhesive coil winding machine was further optimized. The project was successfully completed. At the same time, some experience was summarized and shared with the public during the process.

              

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    Precision winding machine

      Precision winding machine For general winding machines, including CNC and automatic winding machines, only the set number of turns of enameled wire is required to be wound, and the appearance is roughly flat, but there are some special high-demand occasions , It is required that the arrangement of enameled wires must be neat without a random winding.

       

       This kind of coil has several advantages. First, the consistency of inductance is very high. Second, the enameled wire occupies less space, and the enameled wire can reach the ideal neat arrangement. Third, the energy density is high. Fourth, the high temperature resistance performance is better. , The enameled wires are in line contact, and in the case of random winding, the superimposition between the wires will have a little contact, and it is easy to break down under high temperature and high pressure.


       In order to achieve a stable and neat arrangement, in addition to the requirements for enameled wires, compared with general coil winding machines, high requirements are put forward for the electronic control, mechanism design and manufacturing accuracy of structural parts of the fine winding machine.

Ring wrap tape machine

Ring wrap tape machine

Ring wrap tape machine

      We will now demonstrate the operation of the loop coil strapping machine again, take the product, put it in, and then buckle this storage ring. Note that the insulating tape must pass between the two blades of the scissors After the fixed storage coil count is reached, the toroidal coil wrapping machine will rely on it to cut the insulating tape. Then, one end of the tape can be passed through any position of the bearing evenly distributed on the storage ring. After passing through, take the head of the insulating tape and hold it with the head, and then press and start with the right hand. The entire loop coil is covered with insulating tape It's done automatically.

Toroidal transformer winding machine

Toroidal transformer winding machine

Toroidal transformer winding machine

The company has the advantages of R&D and production of electronic transformers and transformers in the whole factory equipment. Different from many assembly manufacturers in the industry, we have accumulated many years of experience in R&D and production in the winding machine industry and developed a new generation of toroidal coil series winding The equipment is widely used in the manufacturing industries of toroidal transformers, transformers, voltage regulators, inductance coils, etc., and has been well received by the industry; Suzhou REPOSL will continue to understand user needs and strengthen technical research and development and after-sales service levels, and provide customers with more professional and high-quality products and service.

Technical features of our toroidal transformer winding machine: Using CNC digital intelligent program controller, stable work, simple operation, with a number of industry-first advanced and practical functions. The core components such as the thread storage ring and the thread belt are made of high-quality steel through multiple processes, which are durable and not deformed. It adopts advanced control circuit and has fault alarm function. The function switches are all controlled by two lines, which is easy to maintain and replace. The operating speed is set separately in the storage and winding state, which can automatically realize the fast storage and low-speed winding operation. The automatic operation function can also be used in the taping machine mode. The operation is simple and the use efficiency is high. When processing multi-winding products, multiple storage and multiple winding procedures can be preset, which is suitable for products with multiple windings but different wire diameters/numbers of turns, or products with insufficient wire storage in a single time, eliminating repeated installation Clamping and manual operation improve production efficiency. Multiple sets of wire density can be preset, and the device can automatically change the preset wire density when winding. When processing multi-winding products, each winding with different turns can be evenly arranged at a preset angle. Double frequency conversion proportional drive, automatic operation or pedal speed regulation can be selected. The speed can be adjusted steplessly, and the appropriate winding speed can be set according to the process requirements of different products. Features: The gear winding machine has the characteristics of large winding torque, high opening size of the gear ring roof ring, a large amount of wire storage and a large range of suitable winding diameters. It is the most versatile Winding model; suitable for products with thick winding diameters, neat wiring requirements and multiple parallel windings, such as small toroidal transformer secondary windings, high-power 驽

           Outer diameter: 193mm

           Inner diameter: 95mm

           Height: 90mm

           Enameled wire diameter: 2.5mmX370



Video instructions for use of toroidal transformer winding machine

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          Suzhou REPOSAL Electronic Mechanical Equipment Co., Ltd. specializes in providing: toroidal transformer winding machine, current transformer winding machine, voltage transformer winding machine, ring voltage regulator winding machine, inductance coil winding machine, iron core chamfering machine , Parallel winding machine and other coil processing equipment and winding machine accessories.

       The company has the advantages of R&D and production of the entire plant of electronic transformers and transformers. It is different from many assembly manufacturers in the industry. We have gathered many engineering and technical personnel in the winding machine industry. After many years of research and development and production experience, we have developed a new generation of series winding. Equipment, especially toroidal winding equipment, is widely used in manufacturing industries such as toroidal transformers, transformers, voltage regulators, inductive coils, etc., and has received many praises from the industry; Customers provide more professional and quality products and services.

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       Below we introduce the structure of this toroidal coil winding machine. This part is the controller and this part is the clamping base. We control the product clamping by opening and closing the handle. This position is the storage ring. The enameled wire is stored on the storage ring first, and then wound around this product. This position is a manual winding handle. Turn this handle. The steel plate can be driven manually. The steel ring has an opening. This position is an opening. The opening is opened and closed by sliding the handle up and sliding to the left. . This position is called the crimping plate, and this position is called the baffle. After the line is removed, its degree of tightness is determined by the tension of the belt. The tension of the belt is adjusted by the tension adjustment knob. When adjusting the tension of the belt, first loosen this And then rotate the handle. When rotating the handle, there is an idler wheel. When the idler wheel goes in, the tension of the belt will increase, so that the winding of the enameled wire will become tighter.

Operation video of belt loop coil winding machine-controller setting

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     Now we focus on the use of the controller of the toroidal coil winding machine. The controller is very mature. It is divided into several functional areas. This one is the status area. For example, the indicator light before the standby character is on, which is standby. Status, the red light in front of the standby is on. For example, when we press Start, the running light will turn on, indicating that it is currently running. This is a status area.

      This is a numeric parameter. When we want to set the parameters of the toroidal coil winding machine, for example, the parameters such as the diameter of the outer diameter and the diameter of the enameled wire, there is still a cable angle for the ring-shaped product. From this position to this position slowly, this involves a range. We use the winding angle and the cable angle to control the cable range on the controller interface, after the specified cable angle , He went back to the line, before and after the set winding angle and line angle.

     The other is the speed. The high-speed and low-speed reference on the controller interface of the loop coil winding machine. The high-speed refers to the normal winding speed. The low-speed is the speed at the beginning and the end, and then the number of slow-down laps. Specify a specific number, such as slow speed, you need to specify a lap speed of one lap, two laps and three laps, according to your needs.

       Here is a switch parameter area, such as the direction of the winding, such as the storage ring on this toroidal coil winding machine, we can let him turn clockwise or counterclockwise, and then the direction of the cable, the cable The direction is the process of winding the product. We can also let him turn clockwise or counterclockwise. This is the direction of the cable. Whether to start automatically between different programs, this can also be set.