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CN-121972590-A - Nut forging equipment based on external roller extrusion and forging method thereof

CN121972590ACN 121972590 ACN121972590 ACN 121972590ACN-121972590-A

Abstract

The invention discloses a nut forging device based on external roller extrusion and a forging method thereof, which relate to the technical field of machine tool functional parts and accessory processing and comprise a device main body, an extrusion wheel and a tap rod, the upper end of the equipment main body is movably provided with a plurality of groups of extrusion wheels, the upper end of the equipment main body is movably provided with a tap rod, and the tap rod is arranged at the center end of the plurality of groups of extrusion wheels. According to the invention, the screw tap rod and the extrusion wheels are arranged, the screw nut is sleeved on the outer wall of the screw tap rod, the plurality of groups of extrusion wheels extrude the screw nut and continuously feed in the radial direction, the screw tap rod drives the screw nut to rotate, the inner wall of the screw nut gradually flows inwards under the continuous rotation and radial pressure, the thread grooves of the screw tap rod are completely formed, high-precision internal threads are formed, the extrusion forming force is small in radial distribution, the screw tap rod mainly bears pressure, the abrasion is small, the external extrusion wheels are in rolling contact with the outer surface of the screw nut, the abrasion is far smaller than the sliding friction of the traditional extrusion screw tap, all threads and the appearance of the screw nut can be formed through one-time rolling, and the speed is faster than that of cutting tapping.

Inventors

  • WU XIAOHONG
  • SUN CHAO
  • ZHANG MINGYU
  • AN QI

Assignees

  • 深圳亚太航空技术股份有限公司

Dates

Publication Date
20260505
Application Date
20260326

Claims (10)

  1. 1. The nut forging device based on external roller extrusion comprises a device main body (1), extrusion wheels (28) and tap rods (37), and is characterized in that a plurality of groups of extrusion wheels (28) are movably mounted at the upper end of the device main body (1), the tap rods (37) are movably mounted at the upper end of the device main body (1), and the tap rods (37) are arranged at the central ends of the plurality of groups of extrusion wheels (28); A plurality of groups of sliding grooves (38) are formed in the upper end of the equipment main body (1), a plurality of groups of second hydraulic pumps (24) are arranged in the equipment main body (1), a plurality of groups of second hydraulic pumps (24) are respectively arranged at the output ends of the second hydraulic pumps (24), a plurality of groups of sliding blocks (26) are respectively arranged at one end of each second hydraulic column (25), a plurality of groups of mounting columns (27) are respectively arranged at the upper ends of the sliding blocks (26), the outer walls of the plurality of groups of mounting columns (27) are respectively and movably connected with the inner walls of the plurality of groups of sliding grooves (38), and extrusion wheels (28) are respectively and movably arranged at the upper ends of the plurality of groups of mounting columns (27); the device is characterized in that a third driving motor (35) is movably arranged in the device body (1), a third driving shaft (36) is arranged at the output end of the third driving motor (35), and one end of the third driving shaft (36) is connected with a tap rod (37).
  2. 2. The nut forging equipment based on external roller extrusion, as set forth in claim 1, characterized in that the support (2) is installed at the upper end of the equipment main body (1), one end of the support (2) is suspended at the upper end of the nut conveying device, one end of the support (2) is provided with a slide way (3), two groups of first driving shafts (5) are movably installed inside the slide way (3), tooth-shaped synchronous belts are arranged between the two groups of first driving shafts (5) to be connected, a first driving motor (4) is installed at the other end of the support (2), one end of one group of first driving shafts (5) is connected with the output end of the first driving motor (4), a movable seat (6) is movably installed inside the slide way (3), and the inner wall of the movable seat (6) is in threaded connection with the outer walls of the two groups of first driving shafts (5).
  3. 3. The nut forging equipment based on external roller extrusion according to claim 2, wherein a first hydraulic pump (7) is installed at the upper end of the movable seat (6), a first hydraulic column (8) is installed at the output end of the first hydraulic pump (7), and a limiting seat (9) is installed at the bottom end of the first hydraulic column (8).
  4. 4. The nut forging equipment based on external roller extrusion according to claim 3, wherein the limiting seat (9) is internally provided with a second driving motor (10), the output end of the second driving motor (10) is provided with a second driving shaft (11), one end of the second driving shaft (11) is provided with a driving disc (12), the outer wall of the driving disc (12) is provided with a mounting ring (13), and the outer wall of the mounting ring (13) is provided with a limiting conical tooth ring (14) and a limiting tooth ring (15).
  5. 5. The nut forging device based on external roller extrusion according to claim 4, wherein a plurality of groups of linkage shafts (18) are movably mounted in the limiting seat (9), one ends of the plurality of groups of linkage shafts (18) are provided with linkage bevel gears (19), the plurality of groups of linkage bevel gears (19) are meshed with the limiting conical ring (14), a plurality of groups of clamping plates (20) are movably mounted at the bottom end of the limiting seat (9), the inner walls of the plurality of groups of clamping plates (20) are respectively in threaded connection with the outer walls of the plurality of groups of linkage shafts (18), and one ends of the plurality of groups of clamping plates (20) are provided with convex plates (21).
  6. 6. The nut forging equipment based on external roller extrusion, as recited in claim 4, wherein a plurality of groups of movable cylinders (16) are movably mounted in the limiting seat (9), movable toothed rings (17) are mounted on the outer walls of the plurality of groups of movable cylinders (16), the plurality of groups of movable toothed rings (17) are meshed with the limiting toothed rings (15), limiting shafts (22) are movably mounted on the inner walls of the plurality of groups of movable cylinders (16), the outer walls of the plurality of groups of limiting shafts (22) are respectively in threaded connection with the inner walls of the plurality of groups of movable cylinders (16), and pressing plates (23) are mounted at the bottom ends of the plurality of groups of limiting shafts (22).
  7. 7. The nut forging apparatus based on external roller extrusion as recited in claim 1, wherein a set of the sliders (26) are provided with toothed plates (29) on the outer walls thereof, a transmission shaft (30) is movably installed inside the apparatus body (1), a one-way bearing is provided at the center end of the transmission shaft (30), a transmission gear (31) is installed at the upper end of the transmission shaft (30), and the transmission gear (31) is engaged with the toothed plates (29).
  8. 8. The nut forging equipment based on external roller extrusion according to claim 7, wherein a contraction barrel (32) is movably mounted in the equipment main body (1), a tooth-shaped synchronous belt is arranged between the contraction barrel (32) and a transmission shaft (30) and is connected, a telescopic column (33) is movably mounted on the inner wall of the contraction barrel (32), a convex block is arranged on the outer wall of the telescopic column (33), a reciprocating thread groove is formed in the inner wall of the contraction barrel (32), the inner wall of the reciprocating thread groove is movably connected with the convex block, a mounting plate (34) is mounted at the upper end of the telescopic column (33), and the mounting plate (34) is fixedly connected with a third driving motor (35).
  9. 9. The nut forging equipment based on external roller extrusion according to claim 1, wherein a blanking groove (39) is formed in one end of the equipment main body (1), the inner wall of the blanking groove (39) is obliquely arranged, a collecting box (40) is movably mounted at one end of the equipment main body (1), and the collecting box (40) is connected with one end of the blanking groove (39).
  10. 10. Nut forging apparatus based on external roller extrusion and forging method thereof, characterized in that the process according to any one of claims 1 to 9 is used, comprising the steps of: S1, sleeving a nut on the outer wall of a tap rod (37), wherein a plurality of groups of clamping plates (20) clamp the nut and drive the nut to be sleeved on the outer end of the tap rod (37); s2, limiting the nut, namely enabling the pressing plate (23) to displace downwards, limiting the nut by the pressing plate (23), and avoiding upward displacement of the nut; S3, extruding the nut by a plurality of groups of extruding wheels (28) in a matched manner, driving the nut to rotate by a tap rod (37), and gradually flowing inwards by the inner wall of the nut under continuous rotation and radial pressure to complete thread grooves of the tap rod (37) to form high-precision internal threads; S4, recovering after the nut processing, namely separating a tap rod (37) from the nut, driving the nut to move to the upper end of a blanking groove (39) by a plurality of groups of clamping plates (20), and then falling the nut into the blanking groove (39) and entering a collecting box (40) through the blanking groove (39).

Description

Nut forging equipment based on external roller extrusion and forging method thereof Technical Field The invention relates to the technical field of machine tool functional parts and accessory machining, in particular to nut forging equipment based on external roller extrusion and a forging method thereof. Background The machine tool functional part is a core execution and support unit for determining the precision, rigidity, efficiency and service life of the machine tool, the accessory is an auxiliary device for expanding the processing capacity of the machine tool and adapting to different working conditions, the machine tool and the auxiliary device can jointly ensure the stable, efficient and high-precision operation of the machine tool, in the machine tool functional part, the nut is not a common fastener, but a key core part for high-precision transmission and positioning, and the positioning precision, dynamic response, rigidity and reliability of the machine tool are directly determined, so the machine tool functional part is an indispensable key functional part of the machine tool. In the traditional nut internal thread processing, a cutting mode (such as tapping) is mainly adopted, material fibers are cut off, so that the thread strength, fatigue life and corrosion resistance are reduced, an extrusion forming process is adopted for improving the thread performance, and the working principle of an extrusion tap is that workpiece materials are extruded through tooth-shaped protruding parts, so that metal plastically flows and fills tap tooth-shaped concave parts to form internal threads. In the prior art, the special extrusion tap has high price, low service life, high cost of bottom hole processing, reworking and scrapping of unqualified products, great improvement of the production cost of extrusion processing, frequent replacement of tools, complex procedures of bottom hole processing, interruption of the production process, great reduction of the production efficiency, and defect of thread tooth type discontinuity, reduction of the connection strength and fatigue resistance of nuts, and influence on the reliability and service life of products. Disclosure of Invention Based on the above, an object of the present invention is to provide a nut forging apparatus based on external roller extrusion and a forging method thereof, so as to solve the above-mentioned technical problems in the background art. The nut forging equipment based on external roller extrusion comprises an equipment main body, extrusion wheels and tap rods, wherein a plurality of groups of extrusion wheels are movably arranged at the upper end of the equipment main body, the tap rods are movably arranged at the upper end of the equipment main body, and the tap rods are arranged at the central ends of the plurality of groups of extrusion wheels; A plurality of groups of sliding grooves are formed in the upper end of the equipment main body, a plurality of groups of second hydraulic pumps are installed in the equipment main body, second hydraulic columns are installed at the output ends of the plurality of groups of second hydraulic pumps, sliding blocks are installed at one ends of the plurality of groups of second hydraulic columns, mounting columns are installed at the upper ends of the plurality of groups of sliding blocks, the outer walls of the plurality of groups of mounting columns are movably connected with the inner walls of the plurality of groups of sliding grooves respectively, and extrusion wheels are movably installed at the upper ends of the plurality of groups of mounting columns; The device is characterized in that a third driving motor is movably arranged in the device main body, a third driving shaft is arranged at the output end of the third driving motor, and one end of the third driving shaft is connected with a tap rod. Through adopting above-mentioned technical scheme, low damage to nut internal thread extrusion, nut cover to screw tap pole outer wall, multiunit extrusion wheel extrudees the nut to last radial feeding, screw tap pole drives the nut and rotates, under rotatory and radial pressure continuously, the gradual inwards flow of nut inner wall, complete screw tap pole's thread tooth groove forms high-accuracy internal thread, radial distribution extrusion shaping power is little, and screw tap pole mainly bears pressure, the wearing and tearing is little, outside extrusion wheel and nut surface rolling contact, wearing and tearing are far less than traditional extrusion screw tap's sliding friction, whole screw thread and nut appearance can be formed in once rolling, the speed is faster than the cutting tapping, the thread processing of specially adapted thin wall nut, dysmorphism nut or high strength material nut. The invention is further characterized in that a support is arranged at the upper end of the equipment main body, one end of the support is suspended at the upper end of the nut conveying