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CN-121988865-A - Continuous feeding device and feeding method for square bar

CN121988865ACN 121988865 ACN121988865 ACN 121988865ACN-121988865-A

Abstract

The invention provides a continuous feeding device and a feeding method of square bars, wherein the device comprises two roller driving units, the two roller driving units are symmetrically arranged on two sides of a square bar feeding path, each roller driving unit comprises a box body, a worm rotatably arranged in the box body, at least two worm gears meshed with the worm, rollers coaxially and fixedly connected with the worm gears, and a driving mechanism, the rollers are configured to enable working surfaces of the rollers to accommodate and press the side surfaces of the square bars, a feeding cavity for clamping the square bars is formed between the rollers corresponding to the two roller driving units, and the driving mechanism is connected with the worm and is used for driving the worm to rotate. According to the invention, the structure that a single worm drives a plurality of worm gears on the same side simultaneously is adopted to feed square bars, so that stable conveying of the square bars can be realized, and the problems that the square bars are easy to deflect or twist in the feeding process, the feeding precision and stability are difficult to ensure and the like are avoided.

Inventors

  • LI HUI
  • ZHAO HAITAO
  • JIANG LETIAN

Assignees

  • 中国航空制造技术研究院

Dates

Publication Date
20260508
Application Date
20260324

Claims (10)

  1. 1. The continuous square bar feeding device is characterized by comprising two roller driving units, wherein the two roller driving units are symmetrically arranged at two sides of a square bar feeding path; Each roller driving unit comprises a box body, a worm, at least two worm gears, rollers and a driving mechanism, wherein the worm is rotatably arranged in the box body, the worm gears are meshed with the worm gears, the rollers are fixedly connected with the worm gears in a coaxial mode, the rollers are configured to enable working faces of the rollers to be capable of accommodating and pressing the lateral faces of the square bars, a feeding cavity for clamping the square bars is formed between the rollers corresponding to the two roller driving units, the driving mechanism is connected to the worm gears, and the driving mechanism is used for driving the worm gears to rotate.
  2. 2. The continuous feeding apparatus for square bar according to claim 1, wherein the number of the rollers is four in each of the roller driving units, and the rollers are arranged at intervals along the feeding direction of the square bar.
  3. 3. The continuous feeding device for square bars according to claim 1, wherein the working surface of the roller is an annular groove, the annular groove comprises a cylindrical surface groove bottom and two side walls respectively connected to two sides of the cylindrical surface groove bottom, the cylindrical surface groove bottom is used for contacting and pressing the side surfaces of the square bars, and the distance between the two side walls is matched with the width of the side surfaces of the square bars.
  4. 4. The continuous square bar feeding device according to claim 1, further comprising an upper guide and a lower guide, wherein the upper guide and the lower guide are respectively arranged at two ends of the box body along the feeding direction, a first guide hole matched with the shape of the square bar is arranged at the center of the upper guide, a second guide hole matched with the shape of the square bar is arranged at the center of the lower guide, and the first guide hole and the second guide hole are coaxially arranged and used for penetrating the square bar.
  5. 5. The continuous feeding apparatus for square bar according to claim 4, wherein the case comprises a housing having a receiving chamber, an upper end cover connected to an upper end of the housing, and a lower end cover connected to a lower end of the housing to close the receiving chamber, the two roller driving units are installed in the receiving chamber.
  6. 6. The continuous feeding apparatus for square bar stock according to claim 5, further comprising a first bearing and a second bearing, wherein both ends of the worm are fixedly connected to an inner ring of the first bearing and an inner ring of the second bearing, respectively, the upper end cap is fixedly connected to an outer ring of the first bearing, and the lower end cap is fixedly connected to an outer ring of the second bearing.
  7. 7. The continuous feeding apparatus for square bar stock according to claim 1, further comprising a connecting shaft, wherein the roller is fixedly connected to an end of the connecting shaft, and wherein the connecting shaft is fixedly connected to the turbine.
  8. 8. A continuous feeding apparatus for square bar stock according to claim 1, wherein the outer circumferential working surfaces of the plurality of rollers arranged in the feeding direction are located in the same plane in the same roller driving unit.
  9. 9. The continuous feeding apparatus for square bar stock according to claim 1, further comprising a base provided with a first chute and a second chute arranged in parallel, wherein one roller driving unit is slidably connected to the first chute, wherein the other roller driving unit is slidably connected to the second chute, and a fastener for fastening the two roller driving units to the base.
  10. 10. A method of feeding square bar stock using the continuous feed apparatus of square bar stock according to any one of claims 1 to 9, comprising the steps of: penetrating the square bar into a feeding channel of a continuous feeding device of the square bar; Starting the driving mechanism to drive the worms at two sides to synchronously rotate; The worm drives a plurality of worm gears meshed with the worm and the coaxial rollers to synchronously rotate; the two opposite side surfaces of the square bar are pressed and friction-driven through the annular groove working surface of the roller, so that the square bar is continuously fed downwards along the axial direction.

Description

Continuous feeding device and feeding method for square bar Technical Field The invention relates to the technical field of square bar conveying, in particular to a continuous feeding device and a continuous feeding method for square bars. Background The metal material friction additive technology (Additive Friction Stir-Deposition) is an additive manufacturing technology which is rapidly developed in recent years, and the technical principle of the technology is shown in fig. 1. The metal square bar is placed in an additive cutter, is driven by the additive cutter to rotate at a high speed, contacts with metal at the bottom under the action of feeding pressure, rubs and generates heat, the heated area material is softened and generates thermoplastic deformation, the thermoplastic material fully flows in the horizontal and vertical directions under the shearing and stirring actions of the rotating additive cutter, is deposited onto a substrate in a transitional manner, and finally forms the forged tissue material with compact tissue, equiaxed fine crystals and isotropy characteristics through a dynamic recrystallization process. Advanced manufacturing processes such as metal material friction material-increasing technology and the like require that a square-section metal bar (square bar) is continuously, stably and accurately fed into a processing area. Conventional feed methods, such as hydraulic pushing, rack and pinion drive, or simple friction wheel drive, often present challenges when applied to square bar stock. For example, hydraulic systems may suffer from problems of response delay and sealing, rack and pinion mechanisms may produce gap accumulation errors during continuous long stroke feed, while conventional flat friction wheels have insufficient clamping force on bar stock, which can easily lead to skidding, and which can be difficult to ensure torsional stability of bar stock during feed, affecting feed straightness and final forming quality. Therefore, a need exists for a specific apparatus and method that provides sufficient driving force, ensures feed synchronism and straightness, and is suitable for continuous and stable transport of square bar stock. Disclosure of Invention First, the technical problem to be solved The invention aims to solve the technical problems of slipping, asynchronous multiple driving points, easy deflection or torsion of square bar in the feeding process, difficult guarantee of feeding precision and stability and the like caused by insufficient clamping force in the existing feeding technology. (II) technical scheme In order to achieve the above purpose, the invention adopts the following technical scheme: The invention provides a continuous square bar feeding device which comprises two roller driving units, wherein the two roller driving units are symmetrically arranged on two sides of a square bar feeding path, each roller driving unit comprises a box body, a worm rotatably arranged in the box body, at least two worm gears meshed with the worm, rollers fixedly connected with the worm gears coaxially, and a driving mechanism, the rollers are configured to enable working faces of the rollers to accommodate and press the side faces of the square bar, a feeding cavity for clamping the square bar is formed between the rollers corresponding to the two roller driving units, and the driving mechanism is connected to the worm and is used for driving the worm to rotate. Preferably, in each roller driving unit, the number of the rollers is four, and the rollers are arranged at intervals along the feeding direction of the square bar. The multipoint contact arrangement provides a uniform and stable driving force and effectively prevents sagging or vibration of the bar during long travel feed. Preferably, the working surface of the roller is an annular groove, the annular groove comprises a cylindrical surface groove bottom and two side walls connected to two sides of the cylindrical surface groove bottom respectively, the cylindrical surface groove bottom is used for contacting and pressing the side surfaces of the square bar, and the distance between the two side walls is matched with the width of the side surfaces of the square bar. The cylindrical surface groove bottom is used for contacting and pressing the side surface of the square bar to provide main friction driving force, and the two side walls form clearance fit with the adjacent side surface (namely, the side surface which is not directly pressed) of the square bar. The clearance fit enables the side wall to effectively guide and limit the bar in a plane perpendicular to the feeding direction, and prevents the bar from twisting or swinging, so that the feeding straightness is ensured. The distance between the two side walls is matched to the width of the sides of the square bar to ensure accurate guidance. The square bar feeding device comprises a box body, and is characterized by further comprising an upper guide a