Self-locking tension balance traction device

Abstract

The invention relates to a self-locking tension balance traction device, which belongs to the field of carbon fiber wire drawing manufacturing devices. A guide shaft is provided, and a guide shaft fixing module is processed at the lower end of a traction disc base. A lower connecting rod fixing module is also processed at the lower end of the traction disc base, which is combined with a lever and upper and lower connecting rods. A hollow pressure box is fixedly installed at the upper end of the traction disc base, and a friction plate and a threading friction plate are stacked in the hollow pressure box. A concave movable pressure plate is installed at the upper end of the uppermost friction plate and fixed with a guide pin. A pressure roller is processed, and a pressure roller assembly is installed on the top of the concave movable pressure plate. The end of the upper connecting rod is connected to the upper connecting rod connection hole at the lower end of a ""-shaped pulling component through an upper connecting rod pin shaft, so that the traction force pulling the composite material can be converted into positive pressure, without other power devices and realizing the self-locking function. The multi-layer friction plate and the multi-layer threading friction plate are superimposed, and the friction force is increased, and the buffering function of the fiber filaments can be realized to achieve the tension balance of the fiber filaments and prevent the broken wires.

Description

Technical Field

[0001] The invention relates to the field of carbon fiber drawing and manufacturing devices, in particular to a self-locking tension balance traction device. Background Art

[0002] As we all know, carbon fiber composite materials have been widely used in aerospace, aviation, navigation, rail transportation, sports and leisure equipment, high-end civilian products and other fields due to their unique high strength, low density, corrosion resistance, and aging resistance. When carbon fiber composite materials are first produced and pass through the curing molding die, due to the large friction between the product and the molding die during the curing process, a carbon fiber sheet pultrusion machine is often required for auxiliary traction. In this process, there is uneven tension in the fiber bundle passing through the curing molding die, resulting in different tensions on each fiber in the fiber bundle, so broken wires often occur, making it difficult to complete the pulling of the fiber bundle at one time. Moreover, due to the different cooling lengths of different fiber filaments, it is easy to cause waste fiber filaments, thereby increasing production costs. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a self-locking tension balancing traction device to solve the problem of uneven tension of fiber bundles caused by auxiliary traction of carbon fiber pultrusion machines, unequal forces on carbon fiber filaments and different cooling times of different fiber filaments, thereby increasing the cost.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a self-locking tension balance traction device, provided with a traction disc base, characterized in that a guide shaft is inserted at the lower part of the traction disc base, the lower end of the traction disc base is connected to one end of a lower connecting rod, the other end of the lower connecting rod is axially connected to the lower part of the lever through a lower fixed shaft, the upper end of the lever is axially connected to one end of an upper connecting rod through a lever pin shaft, a hollow pressure box is fixedly installed at the upper end of the traction disc base, friction plates and wire-threading friction plates are evenly stacked in an interlaced manner inside the hollow pressure box, wire-threading friction plates are processed with evenly distributed wire-threading holes, a concave movable pressure plate is installed at the upper end of the uppermost friction plate, and a guide pin is used to move the concave pressure plate. The movable pressure plate is installed on the hollow pressure box, and a pressure roller assembly is processed. The pressure roller assembly includes a left pressure roller, a left pressure roller bracket, a right pressure roller, a right pressure roller bracket and an "individual" shaped pulling member. The left pressure roller is connected to one end of the left pressure roller bracket, and the right pressure roller is connected to one end of the right pressure roller bracket. The right pressure roller bracket and the other side of the left pressure roller bracket are hinged to the upper part of the "individual" shaped pulling member through a rotating shaft. An upper connecting rod connecting hole is processed at the lower end of the "individual" shaped pulling member. The pressure roller assembly is installed on the top of the concave movable pressure plate, and the end of the upper connecting rod is hinged to the upper connecting rod connecting hole at the lower end of the "individual" shaped pulling member through an upper connecting rod pin.

[0005] The present invention can also be achieved by the following measures: a plurality of shaft holes are processed on the lever.

[0006] The beneficial effect of the present invention is that the traction force of pulling the composite material can be converted into positive pressure, no other power device is required and a self-locking function is realized. The multi-layer friction plates are superimposed on the multi-layer wire threading friction plates to increase the friction force and realize the buffering function of the fiber filaments to achieve the tension balance of the fiber filaments and prevent the wire from breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A schematic diagram of the structure of the present invention

[0008] Figure 2 X-axis sectional view of the present invention

[0009] Figure 3 Y-axis cross-sectional view of the present invention

[0010] Figure 4 A top view of the present invention

[0011] Figure 5 Schematic diagram of the pressure roller assembly structure of the present invention

[0012] Figure 6 A top view of the pressure roller assembly of the present invention

[0013] Figure 7 The structural schematic diagram of the threading friction plate of the present invention is

[0014] Figure 8 This is a schematic diagram of the structure of a new friction plate.

[0015] In the figure, 1. lever, 2. lever pin, 3. upper connecting rod, 4. lower connecting rod, 5. concave movable pressure plate, 6. upper connecting rod pin, 7. pressure roller assembly, 8. hollow pressure box, 9. traction plate base, 10. guide pin, 11. guide shaft, 12. friction plate, 13. wire threading friction plate, 14. guide shaft fixing module, 15. lower connecting rod fixing module, 16. lower fixed shaft, 17. lever shaft connecting module, 71. left pressure roller, 72. left pressure roller bracket, 73. "A" shaped pulling member, 74. rotating shaft, 75. right pressure roller bracket, 76. right pressure roller, 77. upper connecting rod connecting hole, 131. wire threading hole. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1-Figure 8, a guide shaft 11 is provided, a guide shaft fixing module 14 is installed on the guide shaft 11, the guide shaft fixing module 14 is processed at the lower end of the traction disc base 9, and a lower connecting rod fixing module 15 is also processed at the lower end of the traction disc base 9, and the lower connecting rod fixing module 15 is connected to one end of the lower connecting rod 4, and a plurality of shaft holes are processed at the lower part of the lever 1, and the lower fixed shaft 16 passes through the shaft hole to hinge the other end of the lower connecting rod 4 with the lower part of the lever 1, and a lever shaft connection module 17 is processed at the upper end of the lever 1, and a lever pin shaft 2 is used to connect the one side of the upper connecting rod 3, and a hollow pressure box 8 is fixedly installed on the upper end of the traction disc base 9, and friction plates 12 and wire-threading friction plates 13 are staggered and stacked inside the hollow pressure box 8, and wire-threading friction plates 131 are processed on the wire-threading friction plates. A concave movable pressure plate 5 is installed on the upper end of the uppermost friction plate 12, and a guide The pin 10 installs the concave movable pressure plate 5 on the hollow pressure box 8, and processes the pressure roller assembly 7. The pressure roller assembly 7 includes a left pressure roller 71, a left pressure roller bracket 72, a right pressure roller 76, a right pressure roller bracket 75 and an "individual" shaped pulling member 73. The left pressure roller 71 of the pressure roller assembly 7 is connected to one end of the left pressure roller bracket 72, and the right pressure roller 76 is connected to one end of the right pressure roller bracket 75. The other side of the right pressure roller bracket 75 and the left pressure roller bracket 72 are hinged to the upper part of the "individual" shaped pulling member 73 through a rotating shaft 74. The lower end of the "individual" shaped pulling member 73 is processed with an upper connecting rod connecting hole 77, and the pressure roller assembly 7 is installed on the top of the concave movable pressure plate 5, and the end of the upper connecting rod 3 is hinged to the upper connecting rod connecting hole 77 at the lower end of the "individual" shaped pulling member 73 through the upper connecting rod pin 6. The lower end of the lever 1 is pulled, and the lever 1 rotates around the lower fixed shaft 16, and the upper end of the lever 1 pushes the lower connecting rod 4 around the lever pin 2 as the axis.

[0018] When the present invention is used, the carbon fiber tow divided into several small tows is inserted from the rear of the hollow pressure plate 8, that is, in the opposite direction of the pulling force F, and each small tow densely passes through a layer of threading holes 131 reserved on the threading friction plate 13 to increase the friction between the tow and the threading friction plate 13. After each threading friction plate 13 is passed, a friction plate 12 is provided to further increase the friction between the tow and the threading friction plate 13 and the friction plate 12.

[0019] When the traction force F pulls the lower end of the lever 1, the lever 1 pulls the lower connecting rod 4 to drive the traction disc base 9 to make a linear motion along the guide shaft 11 in the same direction as the traction force F. Since the lower end of the lever 1 is axially connected to the lower connecting rod 4 through the lower fixed shaft 16, under the action of the traction force F, the lower fixed shaft 16 is used as a fulcrum to make a limited angle rotation motion. According to the lever principle and Newton's third law, the traction force F is transmitted to the pressure roller assembly 7 through the upper connecting rod 3.

[0020] Since the angle α < π / 2, the upper connecting rod 3 will pull the "I"-shaped pulling member 73 to generate a downward displacement perpendicular to the guiding shaft 11. The left pressure roller bracket 72 and the right pressure roller bracket 75 are driven by the rotating shaft 74 as the axis, driving the left pressure roller 71 and the right pressure roller 76 that are tangent to the lower plane in the groove of the concave movable pressure plate 5 to expand left and right until the left pressure roller 71 and the right pressure roller 76 are simultaneously tangent to the left and right end vertical surfaces in the groove of the concave movable pressure plate 5. Under the simultaneous action of the limiting function of the "I"-shaped pulling member 73, the self-locking of the multi-link mechanism composed of the lower connecting rod 4, the lever 1, the upper connecting rod 3, and the pressure roller assembly 7 is realized.

[0021] The component force perpendicular to the guiding shaft 11 downward from the acting force of the upper connecting rod 3 is converted by the left pressure roller bracket 72 and the right pressure roller bracket 75 into the normal pressure of the left pressure roller 71 and the right pressure roller 76 on the concave movable pressure plate 5. Under the action of this normal pressure, the concave movable pressure plate 5 moves downward under the constraint of the guiding pin 10 and presses the friction plate 12 and the wire threading friction plate 13 placed in the hollow bearing plate 8.

[0022] Since the materials of the friction plate 12 and the wire threading friction plate 13 have a certain compression rate and relatively large toughness, in the initial stage when the self-locking type tension self-balancing traction head moves linearly along the guiding shaft 11 in the same direction as the traction force F under the action of the traction force F, the sum of the frictional forces generated by the friction plate 12 and the wire threading friction plate 13 on each fiber filament bundle that has been inserted into the dense wire threading holes 131 of the wire threading friction plate 13 is less than the traction force required to pull out the cured composite profile from the curing die. The frictional force received by each fiber filament bundle increases gradually from zero to the maximum value, that is, the traction tension it bears also increases gradually from zero to the maximum value until the two finally reach equilibrium to meet the process requirements for pulling out the composite profile from the curing die.

[0023] In this progressive process, that is, before the frictional force received by each fiber filament bundle and the traction tension it bears reach equilibrium, due to the materials of the friction plate 12 and the wire threading friction plate 13 having a certain compression rate, it plays a buffering role for the reverse pulling force of the formed composite profile in the curing die to prevent the occurrence of wire breakage. At the same time, under the interaction of the unbalanced frictional force and the traction tension borne, each fiber filament bundle will generate a certain displacement relative to the friction plate 12 and the wire threading friction plate 13 until the traction force borne by each fiber filament bundle reaches the maximum value and is basically equal, thereby realizing the function of automatic tension balance.

[0024] The position of the shaft hole where the lower fixed shaft 16 is inserted into the lever 1 can be adjusted, that is, the shaft connection position between the lever 1 and the lower connecting rod 4, so as to adjust the position of the fulcrum of the lever 1 and adjust the value of the normal pressure converted from the traction force F to meet the process requirements.

Claims

1. A self-locking tension balancing traction device, provided with a traction disc base, characterized in that: A guide shaft is inserted into the lower part of the traction disc base. The lower end of the traction disc base is connected to one end of the lower connecting rod. The other end of the lower connecting rod is pivotally connected to the lower part of the lever through a lower fixed shaft. The upper end of the lever is pivotally connected to one end of the upper connecting rod through a lever pin shaft. The upper end of the traction disc base is fixedly installed with a hollow pressure-bearing box. Friction plates and wire-passing friction plates are alternately and evenly stacked inside the hollow pressure-bearing box. Uniformly distributed wire-passing holes are machined on the wire-passing friction plates. A concave movable pressure plate is installed at the upper end of the uppermost friction plate, and the concave movable pressure plate is installed on the hollow pressure-bearing box using a guide pin. A pressure roller assembly is machined. The pressure roller assembly includes a left pressure roller, a left pressure roller bracket, a right pressure roller, a right pressure roller bracket, and a "V"-shaped pulling member. The left pressure roller is connected to one end of the left pressure roller bracket. The right pressure roller is connected to one end of the right pressure roller bracket. The other sides of the right pressure roller bracket and the left pressure roller bracket are pivotally connected to the upper part of the "V"-shaped pulling member through a rotating shaft. An upper connecting rod connection hole is machined at the lower end of the "V"-shaped pulling member. The pressure roller assembly is installed on the top of the concave movable pressure plate, and the end of the upper connecting rod is pivotally connected to the upper connecting rod connection hole at the lower end of the "V"-shaped pulling member through an upper connecting rod pin shaft.

2. The self-locking tension balancing traction device according to claim 1, characterized in that A plurality of shaft holes are machined on the lever described above.

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