Stable clamping device for forging special-shaped metal piece

Abstract

The invention relates to the technical field of metal forging forming, and discloses a stable clamping device for forging special-shaped metal parts, which comprises a base arranged in forging equipment, the top of the base is fixedly connected with an anvil block which can be used for bearing blanks, the base is rotationally connected with a driving plate through a guide rail arranged in the base, the top of the driving plate is provided with a clamping piece which can be used for limiting the positions of the blanks, the clamping piece comprises a driving unit arranged at the top of the driving plate, a limiting seat is arranged in the driving unit, and the driving unit is connected with the driving plate. And the two limiting seats are symmetrically distributed along the center of the driving plate. The stable clamping device for forging the special-shaped metal part can effectively solve the problems that in the prior art, manual correction is prone to causing deviation between a blank and the striking axis of a forging hammer, asymmetric upsetting occurs in the blank upsetting process, the radial size distribution of a preformed blank is uneven, and the finish forging quality of the blank is affected.

Description

Technical Field

[0001] The present invention relates to the technical field of metal forging and forming, and particularly relates to a stable clamping device for forging special-shaped metal parts. Background Art

[0002] Forging is a metal processing technology that applies a load to a metal blank by means of forging equipment, causing it to undergo plastic deformation and form, and then obtaining forgings with specific mechanical properties, geometric shapes, and dimensional accuracies. This process can effectively eliminate metallurgical defects such as as-cast porosity formed during the metal smelting process, resulting in the mechanical properties of forgings generally being superior to those of castings of the same type of material.

[0003] For ring forgings, such as flanges, hubs, etc., which usually have complex bolt hole or gear ring structures, their forging process mainly consists of a combination of open die forging and die forging. After the blank is placed on the anvil, it is positioned by a limiting mechanism. First, the blank is upset by the open die forging process to initially form the corresponding workpiece contour, and then the blank is placed into a special forging die for final forging. However, the traditional limiting mechanism can only achieve the positioning constraint of the blank in the plane of the anvil, and it is still necessary to manually observe the coaxiality between the axis of the blank and the axis of the forging hammer strike and perform correction and adjustment. Manual correction is prone to errors, resulting in an offset between the blank and the axis of the forging hammer strike, causing asymmetric upset forging during the upsetting process of the blank, thereby resulting in uneven radial dimension distribution of the preformed blank and affecting the final forging quality of the blank. Summary of the Invention

[0004] Aiming at the above-mentioned shortcomings of the prior art, the present invention provides a stable clamping device for forging special-shaped metal parts, which can effectively solve the problem in the prior art that manual correction easily leads to an offset between the blank and the axis of the forging hammer strike, causing asymmetric upset forging during the upsetting process of the blank, thereby resulting in uneven radial dimension distribution of the preformed blank and affecting the final forging quality of the blank.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] The present invention provides a stable clamping device for forging special-shaped metal parts, including:

[0007] A base provided in the forging equipment;

[0008] A top of the base is fixedly connected with an anvil that can be used to carry the blank. The base is rotationally connected with a driving plate through a guide rail provided inside it, and a clamping member that can be used to limit the position of the blank is provided on the top of the driving plate;

[0009] Among them, the clamping member includes a driving mechanism group provided on the top of the driving plate, and a limiting seat is provided inside the driving mechanism group. There are two limiting seats and they are symmetrically distributed along the center of the driving plate;

[0010] Wherein, when the driving unit drives the two limit seats to move towards each other, the two limit seats can abut against the circumferential outer surface of the blank to complete the limitation of the blank, and the process of the two limit seats moving synchronously towards the blank can adjust and position the position of the blank on the anvil block.

[0011] Further, it further includes a driving member provided outside the base, and the driving member is used to drive the driving plate to rotate around the central axis of the base.

[0012] Further, the driving unit includes a slide rail fixedly connected to the top of the driving plate, and the slide rail is connected to the outside of the limit seat through a moving frame slidably connected to its surface. A bidirectional screw is rotatably connected to the side of the driving plate top away from the slide rail, and a driving frame connected to the outside of the limit seat is threadedly connected to the outer surface of the bidirectional screw. A driving motor capable of driving the bidirectional screw to rotate is fixedly connected to the top of the driving plate.

[0013] Further, the limit seat is slidably connected with a limit rod through a guide hole opened in it, and a plurality of the limit rods are provided and are arranged in an array along the center of the limit seat. The limit rod includes a thick rod section and a thin rod section connected in sequence along its axial direction. The outer diameter of the thick rod section is larger than that of the thin rod section. A stepped connecting portion is formed at the connection between the thick rod section and the thin rod section, and a return spring is connected between the connecting portion and the inner wall of the guide hole;

[0014] When the limit rod is in contact with the circumferential outer surface of the blank, the blank applies a squeezing force to the limit rod, prompting the limit rod to slide along the guide hole. The plurality of limit rods can form a limit area adapted to the outer contour of the blank to adapt to the outer shapes of blanks of different shapes.

[0015] Further, a plurality of card slots are opened on the circumferential outer surface of the thin rod section and are arranged in an array along the center of the thin rod section. An elastic member is provided on the side of the thick rod section close to the blank. A retaining ring that fits the thick rod section is provided on the side of the guide hole away from the thin rod section.

[0016] Further, the limit seat is slidably connected with a limit frame through a guide groove opened on its side away from the blank, and the limit frame is connected to the inner wall of the guide groove through a compression spring provided on its top. The limit frame is rotatably connected with a roller through a mounting frame provided on its bottom. A limit block that fits the outer surface of the thin rod section is fixedly connected to the inside of the limit frame, and a clamping block that fits the inner wall of the card slot is fixedly connected to the inner wall of the limit block. The cross-section of the clamping block is trapezoidally designed. A counterweight block is fixedly connected to the outside of the limit frame.

[0017] Furthermore, the anvil is fixedly connected with an annular plate through a bracket arranged on the outer circumferential surface thereof, and a notch fitting the outer surface of the roller is formed at the top of the annular plate. There are four such notches and they are symmetrically distributed along the center of the annular plate. The side wall of the notch is inclined.

[0018] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0019] The present invention is provided with a clamping member. Reverse threads are adopted on both sides of the bidirectional screw in the driving unit. When the driving motor drives the screw to rotate, the two driving frames move in opposite directions. Through the slide rail, the moving frame and the driving frame, the two limiting seats are synchronously driven to move symmetrically towards each other, ensuring that the geometric center of the blank coincides with the forging hammer striking axis, avoiding forging misalignment and affecting the forging quality of the blank. Moreover, a plurality of limiting rods in the limiting seat are evenly distributed. Each limiting rod is composed of a thick rod section and a thin rod section and is connected to the guide hole through a return spring. When the limiting rod contacts the blank, the normal force on the outer contour of the blank pushes the limiting rod to slide along the guide hole, and the return spring is compressed, enabling the plurality of limiting rods to automatically expand and contract with the surface curvature of the blank, forming a "positioning contour" adapted to the shape of the blank and being compatible with blanks of multiple shapes. When the outer contour of the blank changes dynamically due to plastic deformation, the limiting rod can slide synchronously with the deformation in the guide hole. The elasticity of the return spring allows the limiting rod to adjust its position in real time instead of being rigidly fixed, avoiding mechanical hindrance to the deformation of the blank, preventing additional stress, surface damage or uneven deformation caused by excessive restraint, and improving the forging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a front view three-dimensional structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2 It is a three-dimensional separated structural schematic diagram of the base, the driving plate and the clamping member of an embodiment of the present invention;

[0023] Figure 3 It is a three-dimensional structural schematic diagram of the driving unit of an embodiment of the present invention;

[0024] Figure 4 It is a cross-sectional structural schematic diagram of the limiting seat of an embodiment of the present invention;

[0025] Figure 5 It is a three-dimensional separated structural schematic diagram of the limiting seat and the limiting rod of an embodiment of the present invention

[0026] Figure 6 is a schematic structural diagram of the partial enlargement at position A in the embodiment of the present invention; Figure 5 in the middle;

[0027] Figure 7 is a schematic structural diagram of the partial enlargement at position B in the embodiment of the present invention; Figure 5 in the middle;

[0028] Figure 8 is a three - dimensional separated structural schematic diagram of the limit frame and the roller in the embodiment of the present invention;

[0029] Figure 9 is a schematic structural diagram of the partial enlargement at position C in the embodiment of the present invention; Figure 8 in the middle;

[0030] Figure 10 is a three - dimensional separated structural schematic diagram of the anvil seat and the base in the embodiment of the present invention;

[0031] Figure 11 is a schematic diagram of the state transformation of the limit frame in the embodiment of the present invention.

[0032] The reference numerals in the figure respectively represent: 1. Base; 2. Anvil seat; 21. Ring plate; 22. Notch; 3. Driving plate; 4. Clamping member; 41. Driving unit; 411. Slide rail; 412. Moving frame; 413. Bi - directional screw; 414. Driving frame; 42. Limit seat; 421. Limit frame; 422. Roller; 423. Limit block; 424. Clamping block; 43. Guide hole; 431. Retaining ring; 44. Limit rod; 441. Card slot; 45. Return spring; 5. Driving member. Specific embodiments

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] The present invention will be further described below with reference to the embodiments.

[0035] Embodiment:

[0036] Please refer to Figures 1-11 , the present invention provides a technical solution: a stable clamping device for forging special - shaped metal parts, including:

[0037] a base 1 provided in the forging equipment;

[0038] A base 1 is fixedly connected at the top with an anvil 2 that can be used to carry a blank. The base 1 is rotationally connected with a driving plate 3 through a guide rail provided inside it, and a clamping member 4 that can be used to limit the position of the blank is provided at the top of the driving plate 3;

[0039] Among them, the clamping member 4 includes a driving unit 41 provided at the top of the driving plate 3, and a limiting seat 42 is provided inside the driving unit 41, and there are two limiting seats 42 and they are symmetrically distributed along the center of the driving plate 3;

[0040] Among them, when the driving unit 41 drives the two limiting seats 42 to move towards each other, the two limiting seats 42 can abut against the circumferential outer surface of the blank to complete the limitation of the blank, and the process of the two limiting seats 42 moving synchronously towards the blank can adjust and position the position of the blank on the anvil 2.

[0041] It also includes a driving member 5 provided outside the base 1, and the driving member 5 is used to drive the driving plate 3 to rotate around the central axis of the base 1.

[0042] The driving unit 41 includes a slide rail 411 fixedly connected to the top of the driving plate 3, and the slide rail 411 is connected to the outside of the limiting seat 42 through a moving frame 412 slidably connected to its surface. A bidirectional screw 413 is rotatably connected to one side of the top of the driving plate 3 away from the slide rail 411, and a driving frame 414 connected to the outside of the limiting seat 42 is threadedly connected to the outer surface of the bidirectional screw 413. A driving motor that can be used to drive the bidirectional screw 413 to rotate is fixedly connected to the top of the driving plate 3.

[0043] The limiting seat 42 is slidably connected with a limiting rod 44 through a guide hole 43 opened inside it, and there are multiple limiting rods 44 and they are arranged in an array along the center of the limiting seat 42. The limiting rod 44 includes a thick rod section and a thin rod section connected in sequence along its axial direction. The outer diameter of the thick rod section is larger than that of the thin rod section. A stepped connecting portion is formed at the connection between the thick rod section and the thin rod section, and a return spring 45 is connected between the connecting portion and the inner wall of the guide hole 43;

[0044] When the limiting rod 44 is in contact with the circumferential outer surface of the blank, the blank exerts an extrusion force on the limiting rod 44, prompting the limiting rod 44 to slide along the guide hole 43. Multiple limiting rods 44 can form a limiting area adapted to the outer contour of the blank to adapt to the outer shapes of blanks with different shapes.

[0045] A card slot 441 is opened on the circumferential outer surface of the thin rod section, and there are multiple card slots 441 and they are arranged in an array along the center of the thin rod section. An elastic member is provided on the side of the thick rod section close to the blank, and a retaining ring 431 that fits with the thick rod section is provided on the side of the guide hole 43 away from the thin rod section.

[0046] The limit seat 42 is slidably connected with a limit frame 421 through a guide groove opened on the side away from the blank, and the limit frame 421 is connected with the inner wall of the guide groove through a compression spring arranged on its top. The limit frame 421 is rotatably connected with a roller 422 through a mounting frame arranged on its bottom. A limit block 423 that fits the outer surface of the thin rod section is fixedly connected inside the limit frame 421, and a clamping block 424 that fits the inner wall of the clamping groove 441 is fixedly connected to the inner wall of the limit block 423. The cross section of the clamping block 424 is trapezoidally designed, and a counterweight block is fixedly connected to the outside of the limit frame 421.

[0047] The anvil seat 2 is fixedly connected with an annular plate 21 through a bracket arranged on its circumferential outer surface, and a notch 22 that fits the outer surface of the roller 422 is opened on the top of the annular plate 21. There are four notches 22 and they are symmetrically distributed along the center of the annular plate 21. The side wall of the notch 22 is inclined.

[0048] The working principle and advantages of the stable clamping device for forging special-shaped metal parts:

[0049] The process of blank limiting:

[0050] After the operator places the forging blank to be processed in the bearing area at the top of the anvil seat 2, the driving motor drives the bidirectional screw 413 to rotate. Based on the principle of screw drive, the driving frame 414 and the moving frame 412 installed on the slide rail 411 carry the limit seat 42 and approach the blank along the slide rail 411 synchronously. Since the two sides of the outer circumference of the bidirectional screw 413 adopt a reverse lead thread structure, the two limit seats 42 can move symmetrically and synchronously in opposite directions. Furthermore, through the symmetric approaching movement of the two limit seats 42, the geometric calibration of the spatial position of the blank on the anvil seat 2 can be carried out to ensure that the geometric center of the blank coincides with the striking axis of the forging hammer, and avoid the forging misalignment defect caused by the positioning deviation of the blank.

[0051] Compared with the single-side drive adopted by the traditional clamping part 4, such as a single screw or a cylinder push, the single-side drive will cause uneven distribution of the limiting force, resulting in the offset of the blank. Especially for large-sized blanks, it is difficult to ensure that their geometric centers coincide with the striking axis of the forging hammer, and it is easy to cause defects such as forging misalignment and dimensional deviation.

[0052] When the limit rod 44 in the limit seat 42 initially contacts the outer surface of the blank circumference, multiple groups of limit rods 44 are affected by the normal force of the outer contour of the blank and generate adaptive displacement along the axis direction of the guide hole 43. Through the coordinated deformation of multiple limit rods 44, a "positioning contour" that matches the curvature characteristics of the outer surface of the blank is formed. This "positioning contour" can be compatible with blanks of different specifications and cross-sectional shapes. When the bidirectional screw 413 drives the limit seat 42 to move to the preset positioning coordinates, the driving motor stops driving the bidirectional screw 413, and the rigid limit fixation of the blank on the anvil seat 2 is realized.

[0053] It should be noted that during forging, the blank will undergo significant plastic deformation due to external forces (such as upsetting, drawing out, etc.), and its outer contour dimensions and shape will change dynamically. The limiting rod 44 slides in the guiding hole 43 and can adjust its position synchronously with the deformation of the blank, avoiding rigid constraints on the deformation of the blank, preventing the deformation of the blank from being blocked, generating additional stress or surface damage due to the immobility of the limiting device, thereby affecting the forging quality of the blank. Moreover, for multiple forging of the blank, the cross-sectional shape and dimensions of the blank will change in stages. The limiting rod 44 can automatically adapt to the blank contour at different deformation stages, eliminating the need for manual re-adjustment of the positioning device, improving process compatibility and production efficiency.

[0054] Locking process of the limiting rod 44:

[0055] To achieve uniform stress state in the deformation zone of the blank and avoid the generation of excessive local additional stress or shear stress, after the forging hammering process, a fixed-angle rotation operation needs to be performed on the blank. The driving member 5 arranged outside the base 1 drives the driving plate 3 to rotate around the central axis of the base 1. When the driving plate 3 rotates, the clamping member 4 rigidly connected to it rotates synchronously.

[0056] Four notches 22 with inclined side walls are evenly distributed on the ring plate 21 arranged outside the anvil block 2. The rollers 422 at the lower part of the limiting frame 421 form a rolling fit with the inclined surfaces of the notches 22. Due to the height difference between the top and the inner wall of the notch 22, during the rotation of the driving plate 3, the roller 422 climbs along the inclined surface of the notch 22, pushing the limiting frame 421 to move linearly along the guiding groove on the surface of the limiting seat 42, and at the same time compressing the return spring 45 at the top of the limiting frame 421. When the limiting frame 421 rises to a predetermined position, the limiting block 423 built-in therein fits against the outer surface of the thin rod section of the limiting rod 44, and the clamping block 424 on the limiting block 423 is embedded in the card slot 441 opened on the outer surface of the thin rod section, realizing the mechanical locking of the limiting rod 44 in the guiding hole 43 and preventing its axial movement.

[0057] The driving plate 3 rotates continuously, driving the limit seat 42 and the blank to rotate synchronously. When the blank rotates 90 degrees, the roller 422 enters the low position area of the adjacent notch 22, and the return spring 45 releases elastic potential energy under the cooperative action of the counterweight, driving the limit frame 421 to fall back to the initial position along the guiding groove. The limit block 423 disengages from the thin rod section of the limit rod 44, releasing the mechanical limit, so that the limit rod 44 can freely axially move within the guiding hole 43. During the rotation of the driving plate 3, the engagement and separation of the limit frame 421 and the limit rod 44 cycle, realizing the intermittent fixed-angle rotation of the blank. Moreover, the driving frame 414 and the moving frame 412 are respectively designed in an L shape, and the geometric size of the accommodating space enclosed by the two is larger than the outer diameter size of the ring plate 21. Through geometric size constraints, it is ensured that during the synchronous rotation of the driving frame 414 and the moving frame 412 with the driving plate 3, their relative movement trajectories do not overlap, thereby eliminating the movement interference between the driving frame 414, the moving frame 412 and the ring plate 21.

[0058] During the hot forging forming process of the blank, the oxide scale particles generated by the high-temperature oxidation reaction will adhere to the outer surface of the limit rod 44 and enter the cavity of the guiding hole 43 along the axial movement of the limit rod 44, further aggravating the wear between the guiding hole 43 and the limit rod 44 and resulting in the movement blockage of the limit rod 44. The retaining ring 431 provided on the side of the guiding hole 43 close to the blank forms a sealing barrier with the thick diameter section of the limit rod 44, which can block the oxide scale particles outside the guiding hole 43 and effectively prevent impurities generated during the forging process from entering the cavity of the guiding hole 43.

[0059] The retaining ring 431 is designed as a conical structure, and its inner diameter forms an interference fit with the outer diameter of the thick diameter section of the limit rod 44 (that is, the inner diameter size is slightly smaller than the outer diameter of the rod body), and it is made of a flexible sealing material. When the limit rod 44 moves, the radial component force generated by the interference fit of the conical sealing surface will cause the elastic deformation of the retaining ring 431, making it dynamically fit the surface of the rod body and forming a dynamic pressure sealing interface with self-adaptive ability, thereby constructing an efficient particle barrier to inhibit the penetration of oxide scale particles into the guiding hole 43. In addition, when the limit rod 44 undergoes a slight deflection, the conical frustum structure can generate a radial restoring force through elastic deformation to perform axial centering adjustment on the limit rod 44, effectively reducing the jamming phenomenon and abnormal wear failure caused by the deflection of the rod body.

[0060] After the blank is formed by the free forging process, the obtained preform is transferred to the working cavity of the die forging die, and then the die forging process is carried out in sequence. Through the constraint deformation effect of the die cavity on the metal, the preform is accurately formed into a die forging with the target geometric shape.

[0061] The present invention adopts the clamping member 4, which has the following advantages:

[0062] Advantage 1: The two sides of the bidirectional screw 413 in the driving unit 41 adopt reverse threads. When the driving motor drives the screw to rotate, the two driving frames 414 move in opposite directions. Through the slide rails 411, the moving frames 412 and the driving frames 414, the two limit seats 42 are synchronously driven to move symmetrically towards each other, ensuring that the geometric center of the blank coincides with the forging hammer striking axis, avoiding forging misalignment and affecting the forging quality of the blank.

[0063] Advantage 2: The limit rods 44 are self-adaptive to the contour and compatible with blanks of multiple shapes. The multiple limit rods 44 in the limit seat 42 are evenly distributed. Each limit rod 44 consists of a thick rod section and a thin rod section and is connected to the guide hole 43 through a return spring 45. When the limit rod 44 contacts the blank, the normal force of the outer contour of the blank pushes the limit rod 44 to slide along the guide hole 43, and the return spring 45 is compressed, enabling the multiple limit rods 44 to automatically expand and contract with the surface curvature of the blank, forming a "positioning contour" adapted to the shape of the blank. Whether the blank is circular, irregular or stepped, it can be fitted and limited through the coordinated deformation of the limit rods 44 without the need to replace the fixture.

[0064] Advantage 3: Dynamically follow the deformation of the blank and avoid rigid constraints. During the forging process, when the outer contour of the blank changes dynamically due to plastic deformation, the limit rods 44 can slide synchronously with the deformation in the guide holes 43. The elasticity of the return spring 45 allows the limit rods 44 to adjust their positions in real time instead of being rigidly fixed, avoiding mechanical hindrance to the deformation of the blank and preventing additional stress, surface damage or uneven deformation caused by excessive constraints, thus improving the forging quality.

[0065] Advantage 4: Intermittent fixed-angle rotation to homogenize the stress state. When the driving member 5 drives the driving plate 3 to rotate, the roller 422 at the bottom of the limit frame 421 contacts the inclined notch 22 on the ring plate 21. When the roller 422 climbs along the inclined surface of the notch 22, the limit frame 421 compresses the spring and moves upward, causing the latch 424 of the limit block 423 to engage with the card slot 441 of the thin rod section of the limit rod 44, locking the axial movement of the limit rod 44. At this time, the driving plate 3 drives the blank to rotate rigidly. When the roller 422 enters the low-position area of the notch 22, the spring and the counterweight drive the limit frame 421 to fall back, releasing the lock, and the limit rod 44 resumes free sliding. Through the symmetrical distribution of the notch 22, the blank is automatically locked and unlocked once every 90 degrees of rotation, ensuring that the blank is evenly stressed in all directions during the forging process.

[0066] Advantage 5: The retaining ring 431 provides sealing against oxide scale and reduces component wear. A conical retaining ring 431 is provided on the side of the guide hole 43 close to the blank. Its inner diameter has an interference fit with the thick rod section of the limiting rod 44 (the inner diameter is slightly smaller than the outer diameter), and a flexible sealing material is used. When the limiting rod 44 moves, the retaining ring 431 undergoes elastic deformation due to the interference fit and dynamically fits the surface of the rod body to form a sealing barrier, blocking the oxide scale particles generated during forging outside the guide hole 43. At the same time, the conical structure can provide a radial restoring force for the slight deflection of the limiting rod 44, reducing jamming and abnormal wear and extending the service life of the device.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stable clamping device for forging special-shaped metal parts, characterized in that, Comprising: A base (1) provided inside the forging equipment; A top of the base (1) is fixedly connected with an anvil (2) that can be used to carry a blank. The base (1) is rotationally connected with a driving plate (3) through a guide rail provided inside it, and a clamping member (4) that can be used to limit the position of the blank is provided on the top of the driving plate (3); Among them, the clamping member (4) includes a driving unit (41) provided on the top of the driving plate (3), and a limiting seat (42) is provided inside the driving unit (41). There are two limiting seats (42) and they are symmetrically distributed along the center of the driving plate (3); Among them, when the driving unit (41) drives the two limiting seats (42) to move towards each other, the two limiting seats (42) can abut against the circumferential outer surface of the blank to complete the limiting of the blank, and the process of the two limiting seats (42) moving synchronously towards the blank can adjust and position the position of the blank on the anvil (2).

2. The stable clamping device for forging special-shaped metal parts according to claim 1, characterized in that: It further includes a driving member (5) provided outside the base (1), and the driving member (5) is used to drive the driving plate (3) to rotate around the central axis of the base (1).

3. The stable clamping device for forging special-shaped metal parts according to claim 1, wherein: The driving unit (41) includes a slide rail (411) fixedly connected to the top of the driving plate (3), and the slide rail (411) is connected to the outside of the limiting seat (42) through a moving frame (412) slidably connected to its surface. A bidirectional screw (413) is rotationally connected to one side of the top of the driving plate (3) away from the slide rail (411), and a driving frame (414) connected to the outside of the limiting seat (42) is threadedly connected to the outer surface of the bidirectional screw (413). A driving motor that can be used to drive the bidirectional screw (413) to rotate is fixedly connected to the top of the driving plate (3).

4. The stable clamping device for forging special-shaped metal parts according to claim 1, characterized in that: The limiting seat (42) is slidably connected with a limiting rod (44) through a guiding hole (43) opened inside it. There are multiple limiting rods (44) and they are arranged in an array along the center of the limiting seat (42). The limiting rod (44) includes a thick rod section and a thin rod section connected in sequence along its axial direction. The outer diameter of the thick rod section is greater than the outer diameter of the thin rod section. A stepped connecting portion is formed at the connection between the thick rod section and the thin rod section, and the connecting portion is connected to the inner wall of the guiding hole (43) through a return spring (45); When the limiting rod (44) is in contact with the circumferential outer surface of the blank, the blank applies an extrusion force to the limiting rod (44), prompting the limiting rod (44) to slide along the guiding hole (43). Multiple limiting rods (44) can form a limiting area adapted to the outer contour of the blank to adapt to the outer shapes of blanks with different shapes.

5. The stable clamping device for forging special-shaped metal parts according to claim 4, characterized in that: A plurality of clamping grooves (441) are opened on the circumferential outer surface of the thin rod section, and they are arranged in an array along the center of the thin rod section. An elastic member is provided on the side of the thick rod section close to the blank. A retaining ring (431) that fits with the thick rod section is provided on the side of the guiding hole (43) away from the thin rod section.

6. The stable clamping device for forging special-shaped metal parts according to claim 1, characterized in that: The limiting seat (42) is slidably connected with a limiting frame (421) through a guiding groove formed on the side away from the blank, and the limiting frame (421) is connected with the inner wall of the guiding groove through a compression spring arranged on its top. The limiting frame (421) is rotatably connected with a roller (422) through a mounting frame arranged on its bottom. A limiting block (423) that fits the outer surface of the thin rod section is fixedly connected inside the limiting frame (421), and a clamping block (424) that fits the inner wall of the clamping groove (441) is fixedly connected to the inner wall of the limiting block (423). The cross section of the clamping block (424) is trapezoidally designed. A counterweight is fixedly connected to the outside of the limiting frame (421).

7. The stable clamping device for forging special-shaped metal parts according to claim 1, characterized in that: The anvil seat (2) is fixedly connected with an annular plate (21) through a bracket arranged on its circumferential outer surface. A notch (22) that fits the outer surface of the roller (422) is formed on the top of the annular plate (21). There are four notches (22) which are symmetrically distributed along the center of the annular plate (21). The side wall of the notch (22) is inclinedly designed.

Images