Design Of Wire Take-Up Machine For Titanium And Titanium Alloy Wire Drawing Machines
Due to work hardening, titanium wire processing requires multiple stress relief anneals. With the traditional take-up machine, unloading for intermediate annealing cannot be accommodated. Multiple rewindings are necessary, which are time-consuming, labor-intensive, and uneconomical. Frequency control is often used, which is uneconomical. A three-dimensional solid design and virtual assembly are used in the utility model design this time. For constant tension control of wires with different diameters and strengths, a torque motor is used in the transmission system. To realize the expansion and contraction function of the take-up drum, the crank slider principle is used, allowing for two working conditions: intermediate winding and annealing winding of wires. Installation and removal of the reel are facilitated by the self-centering structure. For the installation of the material head and the supporting cable arrangement and protection device, a simple structure is used.
1 Application overview of Of Wire Take-Up Machine For Titanium And Titanium Alloy Wire Drawing Machines
The wire take-up machine is a machine that uses rollers to wind up films, strips, monofilaments, hoses and covered wires [1]. It is widely used in the production process of wire and strips, such as as a wire drawing machine. For off-line equipment, if an I-wheel take-up machine is used, the finished wire together with the I-wheel can be directly used in the next process, thus eliminating the process of changing wire materials and improving work efficiency.
Tension control is an extremely important part of the production process of the wire take-up machine. Good tension control can ensure product quality and improve production efficiency, especially for wire products that require high dimensional accuracy. Changes in tension may cause wire diameter tolerances fluctuation. Because the wire becomes fuller and fuller, the weight increases, the diameter becomes larger, and the rotation speed is constant. In fact, the speed gradually increases, and the tension will also increase at the same time. Therefore, the rotation speed of the I-wheel should gradually become smaller. The variable frequency motor can reduce the rotation speed through frequency adjustment to meet the speed requirements. However, the motor generates a lot of heat when running at low speed, and the variable frequency motor is relatively expensive.
Some take-up machines add a buffer before taking up the line. When the buffer pool is full, the take-up starts. When the buffer pool is almost empty, the take-up stops. However, the design is relatively complex and the overall cost will also increase. The torque motor has good constant tension performance and is very suitable for take-up. The winding machine has high performance requirements for the motor, so the power system of this design uses a torque motor [3].
The traditional take-up machine only collects the wire on the I-shaped wheel and unwinds it in the next process. However, titanium and its alloy materials require intermediate annealing due to work hardening during the drawing process [3]. Therefore, the traditional take-up machine It is necessary to install a rewinding machine in addition to the take-up machine to wind the wire into a roll separately for annealing, or the I-shaped wheel is made of heat-resistant steel and directly annealed with the wire at the same time. This is not only costly, but may also affect the annealing quality of the product. Not advisable.Therefore, it is mainly aimed at how to realize the two working conditions of titanium and titanium alloy wire intermediate winding and annealing winding efficiently and conveniently, and improve production efficiency. This design designs a new take-up machine in this field, which is a good solution. In order to solve the problem of wire production efficiency of our company, we have also made corresponding optimizations in other structures of the take-up machine, hoping to provide reference for related industries.
2. Design of take-up machine
2.1 Functional principle design
This take-up machine is designed to meet the requirements of multiple times of stress relief annealing due to work hardening in titanium wire processing. It is designed to achieve two working conditions: intermediate winding and annealing winding of wire, while optimizing other functions of ordinary take-up machines. Including feeding mechanism, expansion and contraction curling mechanism, transmission mechanism, cable arrangement mechanism and crimping protection device.
2.2 Structural design
The power of the wire arrangement mechanism 1 comes from the main transmission system. The base value of the cable arrangement speed is the same as the reel speed. The cable arrangement speed can then be adjusted according to the wire diameter to achieve neat cable arrangement.
The expansion drum 2 can expand and contract, using a crank slider structure [4]. After installing the completed character wheel, tighten the handle to drive the axial slider to move inward, and the six tile rings of the drum will move radially outward. Tension to realize the loading of I-shaped wheels or materials. For the process that requires annealing, the initial state of the reel is placed in the open position, the elastic baffle at the discharge end is tightened, and the rotation is positioned at the baffle position. After the winding is completed, the materials are bundled, and the reel shrinks to remove the materials. Direct annealing. When there is no need for annealing in the middle, just install the I-shaped wheel on the drum to realize the winding function and replace the I-shaped wheel cyclically. There are two pairs of symmetrical trapezoidal slotted holes engraved on the drum tile ring and I-shaped wheel. The size is the same as the product size specification. Selecting the hole type with the appropriate direction can realize the self-locking installation of the wire material head.
The crimping device 3 consists of a V-shaped elastic nylon pressure head and a thrust cylinder. After the I-wheel is installed, the cylinder extends to place the elastic pressure head in the groove of the I-wheel. The elastic pressure head increases as the thickness of the material increases. On the one hand, Ensure the neatness of the cable arrangement, and on the other hand ensure that the material will not pop out when the wire is exhausted or broken.
The transmission system 4 chooses a torque motor as the power, which drives the cable organizer to arrange the cable through the belt drive, and drives the take-up reel through the chain drive. The advantage of the torque motor is that it can realize constant tension take-up, and the torque adjustment is quick and smooth, effectively ensuring Stable wire diameter tolerance.
The loading mechanism 5 is mainly composed of a loading trolley and a simple positioning plate. The I-shaped wheel rolls onto the trolley through an inclined plane. The positioning plate with the same diameter as the I-shaped wheel realizes automatic centering in the vertical direction. The tightened reel The top is slightly lower than the top of the I-wheel placed on the trolley. Push the trolley to place the I-wheel in the curling station. Shake the handle to tighten the drum. The center point of the I-wheel moves upward and detaches from the trolley to achieve unconstrained rotation.This utility model design adopts three-dimensional solid design and virtual assembly to ensure that the installation dimensions are correct. It is then converted into two-dimensional processing drawings for processing, which shortens the design cycle and improves design efficiency. The designed product can well realize the function of matching the wire drawing machine for the winding process, and can also adapt to the two working conditions of intermediate winding and annealing winding during the production of titanium and titanium alloy wire. In addition, the ingenious cantilever structure and self-centering structure It is convenient to install and disassemble the reel, as well as supporting cable arrangement and protection devices. It is simple and practical, which greatly reduces the labor intensity of operators and improves production efficiency.
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