Forging executing mechanism of radial forging equipment

Abstract

The invention relates to the field of radial forging equipment, in particular to a forging actuating mechanism of radial forging equipment, which comprises a rack, a hammer rod, a flywheel driven by a first power source, an eccentric shaft coaxially and fixedly connected with the flywheel, and a first eccentric sleeve sleeved on the outer side of the eccentric shaft section; the first power source drives the flywheel to rotate so as to drive the hammer rod to perform radial reciprocating motion through the eccentric shaft and the first eccentric sleeve. According to the embodiment of the invention, a non-open hammer rod structure is adopted, the problem of strength reduction caused by C-shaped opening design of a hammer rod in the prior art is avoided, and the problem of abrasion caused by sliding friction of a sliding block is reduced by a double-eccentric driving hammer rod linear motion structure of the eccentric shaft and the eccentric sleeve; the problems that in the prior art, hammer rod thread stroke adjusting strength is low, hydraulic servo system adjusting is complex and high in cost, and single-hammer-head independent eccentric sleeve adjusting hammer rod stroke synchronization precision is low are solved, and the structure and strength of a stroke adjusting mechanism of the forging executing mechanism are optimized and improved.

Description

Technical Field

[0001] This invention relates to the field of radial forging equipment, and more specifically to a forging actuator for radial forging equipment. Background Technology

[0002] Radial forging equipment is a core piece of equipment for producing high-precision shaft and tube parts. Its working principle is usually to achieve plastic forming of materials by high-frequency forging with multiple hammers. At present, there are many types of radial forging equipment on the market, and their core technology differences are mainly reflected in the transmission mechanism of the hammer rod and the stroke adjustment mechanism of the hammer head.

[0003] For example, the following typical structures exist in the prior art: A type of radial forging equipment (such as the SKK model) uses a threaded adjustment for the hammer rod's stroke. This structure has relatively low strength. The hammer rod also features a wing plate in the middle for return and anti-rotation, making the hammer rod's machining process complex and difficult to manufacture. The equipment's eccentric structure uses a single eccentric combination of an eccentric shaft and a slider. Sliding friction exists between the slider and the transmission nut at the upper end of the hammer rod. This type of equipment has a high forging frequency, making the slider prone to wear and temperature rise, resulting in reduced forming accuracy.

[0004] Another type of radial forging equipment (such as the RF type) has a relatively simple hammer rod structure and high strength, but its hammer stroke adjustment mechanism is a hydraulic cavity, relying on a complex hydraulic servo system to ensure adjustment accuracy. This not only increases the manufacturing cost of the equipment but also introduces the risk of hydraulic cavity leakage. To ensure accuracy, the hydraulic servo system has a hydraulic oil leakage monitoring and compensation system, leading to system complexity and maintenance difficulties. Furthermore, the eccentric structure of this equipment uses a single eccentric combination of an eccentric shaft and a slider. This model of equipment has high forging force, and the slider, as a friction pair, is prone to wear under heavy loads, resulting in reduced forming accuracy.

[0005] Another type of radial forging equipment (such as the SX type) uses a C-shaped opening design for its hammer rod, which reduces the overall structural strength of the hammer rod. The eccentric shaft of the equipment drives a square slider to slide in the C-shaped opening, driving the hammer rod to reciprocate linear motion. This type of friction pair has many friction surfaces and is more prone to wear under high speed and heavy load. In addition, its hammer stroke adjustment mechanism uses a rotating eccentric sleeve, which has a complex shape and is difficult to manufacture.

[0006] In summary, existing radial forging equipment still has room for improvement in terms of the structural strength of the hammer rod, the complexity of processing and manufacturing, the reliability of the stroke adjustment mechanism, and the wear of the transmission mechanism. Therefore, those skilled in the art urgently need a radial forging equipment that can effectively solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a forging actuator for a radial forging equipment, which aims to provide a forging actuator with high structural strength and wear resistance.

[0008] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A radial forging equipment forging actuator includes a frame and at least one forging unit disposed on the frame. The forging unit includes a hammer rod and a hammer rod drive mechanism that drives the hammer rod through a first power source. The hammer drive mechanism includes: A flywheel is connected to the first power source via a transmission connection; An eccentric shaft is coaxially and fixedly connected to the flywheel, and the eccentric shaft has an eccentric shaft segment; And a first eccentric sleeve, fitted on the outside of the eccentric shaft section, the outer wall of the first eccentric sleeve being connected to the inner wall of the through hole on the hammer rod via a cylindrical pair; The first power source drives the flywheel to rotate, thereby driving the hammer rod to perform radial reciprocating motion through the eccentric shaft and the first eccentric sleeve.

[0009] Furthermore, the forging unit also includes a stroke adjustment mechanism driven by a second power source. The stroke adjustment mechanism is used to achieve radial displacement of the reference axis of the hammer rod drive mechanism relative to the frame, so as to adjust the stroke position of the hammer rod.

[0010] Furthermore, the stroke adjustment mechanism includes: A second eccentric sleeve is rotatably mounted on the frame, the second eccentric sleeve having an eccentric second eccentric hole; A third eccentric sleeve is fitted into the second eccentric hole, the third eccentric sleeve having an eccentric third eccentric hole; And a motion guide, which is connected to the third eccentric hole through a cylindrical pair, the motion guide being used to constrain the third eccentric sleeve to perform a translational movement along the movement direction of the hammer rod when the second eccentric sleeve and the third eccentric sleeve rotate; The eccentric shaft of the hammer drive mechanism is rotatably mounted in the third eccentric hole. The second power source drives the second eccentric sleeve to rotate, thereby driving the eccentric shaft to perform radial movement through the third eccentric sleeve and the motion guide.

[0011] Furthermore, the motion guide is a sleeve having a circumferential surface and two parallel guide surfaces, with the guide surfaces parallel to the direction of movement of the hammer rod. The circumferential surface of the motion guide is fitted into the third eccentric hole, and the guide surfaces of the motion guide are slidably connected to the frame.

[0012] Furthermore, the stroke adjustment mechanism also includes: A second drive gear is driven by the second power source; And a driven gear ring, which is connected to the second driving gear, and the driven gear ring is coaxially and fixedly connected to the second eccentric sleeve.

[0013] Furthermore, the stroke adjustment mechanism also includes: a central gear ring, which is coaxial with the forging center of the forging unit and meshes with the second drive gear, and each driven gear ring meshes with the same central gear ring.

[0014] Furthermore, the forging unit also includes: A first drive gear is rotatably mounted on the frame and driven by the first power source; A universal joint drives the first drive gear and the flywheel.

[0015] Furthermore, the universal joint includes: A cross slide is disposed between the first drive gear and the flywheel; A first slide connects the cross slide to the first drive gear and allows the cross slide to perform radial movement relative to the first drive gear; A second slide, perpendicular to the first slide, connects the flywheel to the cross slide and allows the flywheel to perform radial movement relative to the cross slide.

[0016] Furthermore, each first driving gear is connected to the same first power source through a gear transmission mechanism.

[0017] Furthermore, the frame includes a guide hole pointing to the forging center of the forging unit, and the hammer rod performs radial reciprocating motion through the guide hole.

[0018] The advantages of this invention compared to the prior art include: The embodiments of the present invention employ a non-opening hammer rod structure, which avoids the strength reduction problem caused by the C-shaped opening design in the prior art. At the same time, the embodiments of the present invention also use an eccentric sleeve to replace the slider in the prior art. The eccentric sleeve can provide more stable and uniform lateral support during movement, reduce the wear problem of point contact or line contact, help extend the overall service life of the transmission mechanism, and reduce maintenance costs. Attached Figure Description

[0019] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a perspective view of an embodiment of the present invention; Figure 2 This is a front view of an embodiment of the present invention; Figure 3 for Figure 2 A cross-sectional view along the AA direction; Figure 4 This is a top view of an embodiment of the present invention; Figure 5 for Figure 4 A cross-sectional view along the BB direction; Figure 6 This is a perspective view of the hammer rod drive mechanism and stroke adjustment mechanism according to an embodiment of the present invention; Figure 7 This is a first assembly drawing of the hammer rod drive mechanism and stroke adjustment mechanism according to an embodiment of the present invention; Figure 8 This is a second assembly diagram of the hammer rod drive mechanism and stroke adjustment mechanism according to an embodiment of the present invention; The labels in the diagram represent the following: 1-Frame; 2-Forging unit; 21-Hammer rod; 22-Flywheel; 23-Eccentric shaft; 231-Eccentric shaft section; 24-First eccentric sleeve; 25-First driving gear; 26-Universal joint; 261-Cross slide; 262-First slide table; 263-Second slide table; 3-Stroke adjustment mechanism; 31-Second eccentric sleeve; 32-Third eccentric sleeve; 33-Motion guide; 331-Circumferential surface; 332-Guide surface; 34-Second driving gear; 35-Driven gear ring; 36-Center gear ring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] This invention provides a radial forging equipment forging actuator, including a fixed frame 1 and at least one (usually four sets of symmetrically arranged) forging unit 2, each forging unit 2 including a hammer rod 21.

[0023] The core of the forging unit 2 is a hammer rod drive mechanism, which is driven by a first power source (usually an electric motor), and the power is transmitted to a flywheel 22 through a cross slide 261.

[0024] The cross slide 261 transmits torque through the first slide 262 and the second slide 263, which are perpendicular to each other, while allowing a certain radial error, thus playing a flexible connection role.

[0025] Flywheel 22 is used to store and release energy, providing the huge instantaneous impact force required for forging.

[0026] The flywheel 22 drives the first double eccentric system to achieve the forging action. The first double eccentric system includes an eccentric shaft 23 and a first eccentric sleeve 24. The eccentric shaft 23 is coaxially and fixedly connected to the flywheel 22, and has an eccentric shaft section 231 on it. The first eccentric sleeve 24 is fitted on the outer wall of the eccentric shaft section 231. The outer wall of the first eccentric sleeve 24 is connected to the inner wall of the through hole of the hammer rod 21 through a cylindrical pair.

[0027] That is, the through holes of the first eccentric shaft section 231, the first eccentric sleeve 24, and the hammer rod 21 are connected in sequence through two cylindrical pairs.

[0028] When the eccentric shaft 23 rotates at high speed, the first eccentric sleeve 24 drives the hammer rod 21 to move. At the same time, the hammer rod 21 is constrained by the guide hole on the frame 1 and can only perform radial reciprocating linear motion, thereby realizing radial forging of the workpiece.

[0029] In a preferred embodiment, the device includes multiple symmetrically arranged forging units 2, each forging unit 2 being synchronously driven by the same first power source through a first gear transmission mechanism (not shown in the figure) to ensure the synchronicity of forging and the geometric accuracy of the forgings.

[0030] To achieve stroke adjustment, the present invention introduces a stroke adjustment mechanism 3, which is used to move the reference axis of the entire hammer rod drive mechanism (the axis of flywheel 22, eccentric shaft 23 and first eccentric sleeve 24) radially, thereby translating the movement range of hammer rod 21 to achieve the purpose of adjusting the forging diameter.

[0031] The stroke adjustment mechanism 3 is implemented as follows: it includes an independent second power source (usually a motor), a second gear transmission mechanism and a second double eccentric system; the second double eccentric system consists of a second eccentric sleeve 31, a third eccentric sleeve 32 and a motion constraint device (preferably a motion guide 33).

[0032] The assembly relationship between the first and second double-eccentric systems is nested: The eccentric shaft 23 of the hammer drive mechanism is installed in the eccentric hole of the third eccentric sleeve 32; the third eccentric sleeve 32 is installed in the eccentric hole of the second eccentric sleeve 31; and the second eccentric sleeve 31 is rotatably mounted on the frame 1. The motion guide 33 is connected to the third eccentric sleeve 32 through a cylindrical pair, and its shape slides with the guide rail on the frame 1, thereby constraining the third eccentric sleeve 32 to make linear translation in the radial direction.

[0033] The stroke adjustment process is as follows: the second power source is started, and the second eccentric sleeve 31 is driven to rotate through the independent second gear transmission mechanism. The rotation of the second eccentric sleeve 31 will force the third eccentric sleeve 32 (and the entire hammer rod drive mechanism carried inside it) to undergo radial displacement through the eccentric relationship. This displacement corresponds precisely to the rotation angle of the second eccentric sleeve 31, thereby realizing high-precision adjustment of the stroke position of the hammer rod 21.

[0034] The second gear transmission mechanism preferably includes a second driving gear 34 driven by a second power source, a central gear ring 36, and a driven gear ring 35 that meshes with the central gear ring 36 and is coaxially fixed to the second eccentric sleeve 31.

[0035] When the device contains multiple forging units 2, the stroke adjustment mechanism 3 of all units is synchronously driven by the same second power source through the central gear ring 36. The central gear ring 36 is coaxial with the forging center of the forging unit 2, ensuring that the stroke position of all hammer rods 21 is adjusted simultaneously and equally, thus guaranteeing the center and shape accuracy of the forging.

[0036] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. A forging actuator for a radial forging equipment, characterized in that, It includes a frame (1) and at least one forging unit (2) disposed on the frame (1), the forging unit (2) including a hammer rod (21) and a hammer rod drive mechanism that drives the hammer rod (21) through a first power source; The hammer drive mechanism includes: A flywheel (22) is connected to the first power source via a transmission. An eccentric shaft (23) is coaxially fixedly connected to the flywheel (22), and the eccentric shaft (23) has an eccentric shaft segment (231). And a first eccentric sleeve (24) is fitted on the outside of the eccentric shaft section (231), and the outer wall of the first eccentric sleeve (24) is connected to the inner wall of the through hole on the hammer rod (21) by a cylindrical pair. The first power source drives the flywheel (22) to rotate, thereby driving the hammer rod (21) to perform radial reciprocating motion through the eccentric shaft (23) and the first eccentric sleeve (24).

2. The forging actuator of the radial forging equipment according to claim 1, characterized in that, The forging unit (2) also includes a stroke adjustment mechanism (3) driven by a second power source. The stroke adjustment mechanism (3) is used to realize the radial displacement of the reference axis of the hammer rod drive mechanism relative to the frame (1) to adjust the stroke position of the hammer rod (21).

3. The forging actuator of the radial forging equipment according to claim 2, characterized in that, The stroke adjustment mechanism (3) includes: A second eccentric sleeve (31) is rotatably mounted on the frame (1), the second eccentric sleeve (31) having an eccentric second eccentric hole; A third eccentric sleeve (32) is fitted into the second eccentric hole, the third eccentric sleeve (32) having an eccentric third eccentric hole; And a motion guide (33) is connected to the third eccentric hole via a cylindrical pair. The motion guide (33) is used to constrain the third eccentric sleeve (32) to perform translational movement along the movement direction of the hammer rod (21) when the second eccentric sleeve (31) and the third eccentric sleeve (32) rotate. The eccentric shaft (23) of the hammer rod drive mechanism is rotatably mounted in the third eccentric hole. The second power source drives the second eccentric sleeve (31) to rotate so as to drive the eccentric shaft (23) to perform radial movement through the third eccentric sleeve (32) and the motion guide (33).

4. The forging actuator of the radial forging equipment according to claim 3, characterized in that, The motion guide (33) is a sleeve with a circumferential surface (331) and two parallel guide surfaces (332), and the guide surfaces (332) are parallel to the movement direction of the hammer rod (21). The circumferential surface (331) of the motion guide (33) is fitted into the third eccentric hole, and the guide surfaces (332) of the motion guide (33) are slidably connected to the frame (1).

5. The forging actuator of the radial forging equipment according to claim 3, characterized in that, The stroke adjustment mechanism (3) also includes: A second drive gear (34) is driven by the second power source; And a driven gear ring (35) is connected to the second driving gear (34) for transmission, and the driven gear ring (35) is coaxially fixedly connected to the second eccentric sleeve (31).

6. The forging actuator of the radial forging equipment according to claim 5, characterized in that, The stroke adjustment mechanism (3) further includes: a central gear ring (36), which is coaxial with the forging center of the forging unit (2) and meshes with the second drive gear (34), and each driven gear ring (35) meshes with the same central gear ring (36).

7. The forging actuator of the radial forging equipment according to claim 2, characterized in that, The forging unit (2) also includes: A first drive gear (25) is rotatably mounted on the frame (1) and driven by the first power source; A universal joint (26) drives the first drive gear (25) and the flywheel (22).

8. The forging actuator of the radial forging equipment according to claim 7, characterized in that, The universal joint (26) includes: A cross slide (261) is disposed between the first drive gear (25) and the flywheel (22); A first slide (262) connects the cross slide (261) to the first drive gear (25) and allows the cross slide (261) to perform radial movement relative to the first drive gear (25); A second slide (263) perpendicular to the first slide (262) connects the flywheel (22) to the cross slide (261) and allows the flywheel (22) to perform radial motion relative to the cross slide (261).

9. The forging actuator of the radial forging equipment according to claim 8, characterized in that, Each first driving gear (25) is connected to the same first power source through a set of gear transmission mechanisms.

10. The forging actuator of the radial forging equipment according to claim 1, characterized in that, The frame (1) includes a guide hole pointing to the forging center of the forging unit (2), and the hammer rod (21) performs radial reciprocating motion through the guide hole.

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