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CN-121988686-A - Double-spiral spring integrated manufacturing device based on non-rotating fluidization forming

CN121988686ACN 121988686 ACN121988686 ACN 121988686ACN-121988686-A

Abstract

The invention discloses a double-spiral spring integrated manufacturing device based on non-rotating fluidization forming, and relates to the technical field of spring forming. The invention comprises a machine tool, a primary non-rotating fluidization forming unit, an interstage guide channel and a secondary winding forming unit, wherein the primary non-rotating fluidization forming unit comprises a primary core rod mounting seat, a primary core rod, a planetary wire nozzle, a primary rotation driving mechanism and a pushing element, adopts a topological structure of core rod rest and wire winding, winds a wire on the static primary core rod by using the rotating planetary wire nozzle, and continuously extrudes a coil wound to be formed towards the direction of the interstage guide channel by matching with the pushing element, and the output primary spring does not have any rotation component and is in linear translation fluidization output, so that the coil can smoothly enter the subsequent static interstage guide channel, is convenient to wind to the rotating secondary core rod, thoroughly solves the problem of interstage rotation interference, realizes continuous and integrated forming of double-coil springs, and improves the production efficiency.

Inventors

  • BAI YAN
  • Jia Zeshuai

Assignees

  • 辽宁工程技术大学

Dates

Publication Date
20260508
Application Date
20260306

Claims (10)

  1. 1. Double-spiral spring integrated manufacturing device based on no-rotation fluidization shaping, its characterized in that includes: A machine tool (1); The primary non-rotating fluidization forming unit (2) comprises a primary core rod mounting seat (21), a primary core rod (22), a planetary wire guide nozzle (23), a primary rotation driving mechanism (24) and a pushing element (25), wherein the primary core rod mounting seat (21) is fixed on the machine tool (1), one end of the primary core rod (22) is fixed on the primary core rod mounting seat (21), the planetary wire guide nozzle (23) is axially parallel to the primary core rod (22) and is arranged on the peripheral side of the primary core rod (22), the primary non-rotating fluidization forming unit is provided with an outlet (231) which is far away from the primary core rod mounting seat (21), the primary rotation driving mechanism (24) is in transmission connection with the planetary wire guide nozzle (23) to drive the planetary wire guide nozzle (23) to rotate around the axis of the primary core rod (22), a wire penetrating out of the outlet (231) is wound on the primary core rod mounting seat (22), and the pushing element (25) is correspondingly arranged on the wire guide nozzle (23) to be far away from the primary core rod (21) and is arranged on one side of the planetary wire guide nozzle (231) to be far away from the primary core rod mounting seat; An inter-stage guide passage (3), wherein the inter-stage guide passage (3) is arranged on the machine tool (1) and is positioned on the opposite side of the primary core rod mounting seat (21), the other end of the primary core rod (22) coaxially extends into a feed port of the inter-stage guide passage (3), and a clearance passage for the passage of metal wires is formed between the outer wall of the primary core rod (22) and the inner wall of the inter-stage guide passage (3); The secondary winding forming unit (4) comprises a linear sliding mechanism (41), a secondary rotary driving mechanism (42) and a secondary core rod (43), wherein the linear sliding mechanism (41) is arranged on the machine tool (1), the secondary rotary driving mechanism (42) is fixed at the sliding end of the linear sliding mechanism (41) so as to slide along the direction vertical to the primary core rod (22), and the secondary core rod (43) is arranged vertical to the primary core rod (22) and is in transmission connection with the output end of the secondary rotary driving mechanism (42), and the outer surface of the secondary core rod is in sliding fit with the discharge port of the inter-stage guide channel (3).
  2. 2. The integrated manufacturing device for double spiral springs based on non-rotating fluidization forming according to claim 1, wherein the primary rotation driving mechanism (24) comprises a primary rotation driving part (241) and a rotation flywheel (242), the primary rotation driving part (241) is fixed on the machine tool (1), the rotation flywheel (242) is rotatably installed on the primary core rod (22) between the primary core rod installation seat (21) and the pushing element (25) and is in transmission connection with the output end of the primary rotation driving part (241), and the planetary wire nozzle (23) is fixed on a wheel disc of the rotation flywheel (242) corresponding to the outer peripheral side of the primary core rod (22).
  3. 3. The integrated manufacturing device of double spiral springs based on spinless fluidization forming according to claim 1, wherein the pushing element (25) is a wedge-shaped pushing block, the wedge-shaped pushing block is fixed on the shaft body of the primary core rod (22), one side of the wedge-shaped pushing block, which is close to the primary core rod mounting seat (21), is provided with a material guiding inclined plane (251) for guiding materials in a direction away from the primary core rod mounting seat (21), and one side, which is far away from the primary core rod mounting seat (21), is provided with a stop straight plane (252) for preventing the guided materials from backing.
  4. 4. The integrated manufacturing device of the double spiral spring based on the spinless fluidization forming according to claim 1, wherein the inter-stage guide channel (3) comprises a cylindrical guide pipe (31) and a fish-mouth type nozzle (32), the cylindrical guide pipe (31) and the primary core rod (22) are coaxially arranged and fixed on the machine tool (1), one side of the primary core rod (22) away from the primary core rod mounting seat (21) is in clearance penetrating through a feed port of the cylindrical guide pipe (31), and the fish-mouth type nozzle (32) is mounted at a discharge port of the cylindrical guide pipe (31) and forms topological envelope fitting with the outer surface of the secondary core rod (43).
  5. 5. The apparatus for integrally manufacturing a double helical spring based on spinless fluidization forming according to claim 4, wherein the fishmouth nozzle (32) has a downwardly concave arc structure, the radius of curvature of which is the same as the radius of the secondary core rod (43), and the inner wall surface of which is smoothly connected with the inner wall surface of the discharge port of the cylindrical guide tube (31).
  6. 6. The integrated manufacturing device of double helical springs based on non-rotating fluidization forming according to claim 4, wherein the feeding port and the discharging port of the cylindrical conduit (31) are tapered along the discharging direction thereof.
  7. 7. The integrated manufacturing device of a double spiral spring based on non-rotating fluidization forming according to claim 1, further comprising a follow-up tail seat (44), wherein the follow-up tail seat (44) comprises a tail seat support (441), a linear pushing mechanism (442) and a rotating center (443), the tail seat support (441) is installed at the sliding end of the linear sliding mechanism (41) and located at the opposite side of the secondary rotation driving mechanism (42), the linear pushing mechanism (442) is installed on the tail seat support (441), the rotating center (443) is rotatably installed at the pushing end of the linear pushing mechanism (442), and the tip of the rotating center (443) can be pressed on the end face, far away from one end of the secondary rotation driving mechanism (42), of the secondary core rod (43) so as to ensure the rotation stability of the secondary core rod (43).
  8. 8. The double-spiral spring integrated manufacturing device based on the spinless fluidization forming according to claim 7, wherein the end portion of the secondary core rod (43) arranged corresponding to the rotating center (443) is provided with a center hole in plug-in fit with the tip of the rotating center (443).
  9. 9. The integrated manufacturing device for double spiral springs based on non-rotating fluidization forming according to claim 7, wherein the linear sliding mechanism (41) comprises a guide rail (411), a sliding seat (412), a lead screw (413) and a linear feeding servo motor (414), the guide rail (411) is perpendicular to the primary core rod (22) and is arranged on the machine tool (1), the sliding seat (412) is slidably arranged on the guide rail (411), the lead screw (413) is in transmission connection with the sliding seat (412), the output end of the linear feeding servo motor (414) is in transmission connection with the lead screw (413), and the secondary rotation driving mechanism (42) and the tailstock bracket (441) are respectively arranged on the sliding seat (412) corresponding to two ends of the secondary core rod (43).
  10. 10. The integrated manufacturing device of double spiral springs based on non-rotating fluidization forming according to any one of claims 1-9, wherein the secondary rotation driving mechanism (42) comprises a secondary rotation driving part (421) and a shaft coupling (422), a bearing seat (423) is installed on the machine tool (1), one end of the secondary core rod (43) passes through the bearing seat (423) and is connected with the output end of the secondary rotation driving part (421) through the shaft coupling (422), and the secondary core rod is connected with the bearing seat (423) through a bearing.

Description

Double-spiral spring integrated manufacturing device based on non-rotating fluidization forming Technical Field The invention relates to the technical field of spring forming, in particular to a double-spiral spring integrated manufacturing device based on non-rotating fluidization forming. Background With the rapid development of minimally invasive interventional medical technology, high-end fields such as cardiac electrophysiology, nerve intervention, intravascular ultrasound (IVUS) and the like have put very high demands on the performance of catheters and guide wires. The micro double-spiral composite spring (namely a micro spring sleeve micro spring structure) becomes a core framework component of the medical instrument due to excellent torque transmission fidelity, excellent bending resistance and flexible touch. The inner layer spring wire diameter of such structures is typically only 0.03mm-0.1mm and the outer layer wire diameter is 0.1mm-0.3mm, and is often required to have a continuous length of several meters long to accommodate the human vascular path. In the prior art, an off-line step method process is still commonly adopted for manufacturing the double-layer composite structure. The typical process is that firstly, a first-stage inner layer micro spring is independently prepared on a precise coiling machine, the first-stage micro spring is sheared and subjected to stress relief treatment, then the first-stage micro spring is penetrated into a rotary core rod in a manual or semi-automatic mode, and finally, the first-stage micro spring is clamped on secondary coiling equipment to be wound by an outer layer spiral, and the following defects generally exist: 1. the production efficiency and the yield are low, a great deal of man-hour is occupied by complicated intermediate transfer and manual collar penetrating joint, and the manual operation is extremely easy to cause the stretch deformation of the extremely soft primary micro spring, so that the coaxiality of the finished product is difficult to ensure. 2. The traditional spring machine adopts a 'rotating core rod' mode, if the primary forming unit adopts the mode, the output primary spring is spun at a high speed of thousands of revolutions per minute, the 'flexible shaft' rotating at the high speed cannot be captured and fed into a subsequent static guide mechanism, and a severe whip effect can be generated instantly to cause material breakage, so that the existing equipment lacks a 'core rod static and spring translational output' forming mechanism, the problem of rotational interference in the multi-stage winding process cannot be solved, and automatic connecting wires cannot be realized. 3. The flexible transmission stability is poor, the existing guide mechanism is mostly in point contact or clearance fit, the length-diameter ratio of the primary micro spring is extremely large, the lateral bending stiffness is almost zero, and buckling folding (Buckling) or stacking blocking of the micro spring is extremely easy to occur under the thrust action as long as a tiny suspension gap exists between the guide nozzle and the rotary core rod in the process of pushing the micro spring into the secondary winding station. 4. The secondary forming precision is insufficient, namely, in the secondary winding of the slender double-spiral structure, the mandrel of the cantilever structure is easy to generate centrifugal runout, so that the pitch of a finished product is uneven, and an effective follow-up steady-state supporting mechanism is lacked. Disclosure of Invention In view of the above, the present invention aims to provide a double-coil spring integrated manufacturing apparatus based on non-rotational fluidization forming, so as to solve at least to some extent one or more of the above-mentioned technical problems of low production efficiency and yield, kinematic interference, poor flexible transmission stability, and insufficient secondary forming precision in the prior art. In order to achieve the above purpose, the present invention adopts the following technical scheme: a double-spiral spring integrated manufacturing device based on non-rotating fluidization forming comprises: a machine tool; The device comprises a primary non-rotating fluidization forming unit, a primary core rod mounting seat, a primary core rod, a planetary wire nozzle, a primary rotation driving mechanism and a pushing element, wherein the primary core rod mounting seat is fixed on the machine tool, one end of the primary core rod is fixed on the primary core rod mounting seat, the planetary wire nozzle is axially parallel to the outer peripheral side of the primary core rod and is provided with an outlet arranged far away from the primary core rod mounting seat, the primary rotation driving mechanism is in transmission connection with the planetary wire nozzle to drive the planetary wire nozzle to rotate around the axis of the primary core rod, a wire penetrating out of