Forging press for automobile parts

Abstract

An automobile part forging press relates to the field of automobile part processing device, including portal frame, lower pressing assembly, upper die holder and lower die holder, the lower pressing assembly is fixedly connected with the portal frame, the upper die holder is slidingly connected with the portal frame, the lower pressing assembly is fixedly connected with the upper die holder, the lower die holder is fixedly connected with the portal frame, the upper die holder and the lower die holder are provided with anvil self-rotating type forging part, the anvil self-rotating type forging part includes upper anvil, cylindrical sliding column, lower anvil, self-rotating assembly and adaptive swing assembly, the upper die holder is provided with vertical downward pressing sliding groove, the cylindrical sliding column is slidingly connected with the vertical downward pressing sliding groove, the cylindrical sliding column is connected with the vertical downward pressing sliding groove through the self-rotating assembly, the cylindrical sliding column is fixedly connected with the upper anvil, the lower die holder is fixedly connected with the lower anvil through the adaptive swing assembly, the beneficial effect is that the material flow is not smooth due to excessive frictional resistance is avoided, thereby the deformation effect of single forging is enhanced, the forging frequency is reduced and the forging efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive parts processing equipment, and in particular to a forging press for automotive parts. Background Technology

[0002] As is well known, in the forging production of automotive parts, for parts with complex shapes, it is usually necessary to first upset the original billet to form a blank that conforms to the size and shape of the final forging die cavity.

[0003] Chinese patent CN223338285U describes a forging die for processing automotive parts, comprising an operating table, a lower die base, a first rectangular block, a first rectangular hole, and a connecting seat. The lower die base can be replaced by detaching the first rectangular block from the first rectangular hole, improving work efficiency. However, in actual use, the following problems still exist:

[0004] During the upsetting process, the huge static friction between the anvil and the upper and lower surfaces of the workpiece severely hinders the radial flow of the material at the contact surface. It was found during the forging process that this frictional resistance caused the billet to have a "bulging belly" deformation. That is, the core material flows too fast due to the low resistance, while the surface material flows very slowly due to the high friction, resulting in extremely uneven deformation. Therefore, the effective deformation of a single upsetting is severely limited, making it difficult to achieve the ideal preform shape. In order to eliminate the bulging and obtain a regular preform, it is necessary to perform multiple flipping and repeated forging to correct and shape it, which increases the number of forging production cycles and leads to a decrease in forging efficiency and an increase in production costs.

[0005] Therefore, a forging press for automotive parts is proposed. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a forging press for automotive parts.

[0007] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0008] A forging press for automotive parts includes a gantry frame, a lower pressing assembly, an upper die holder, and a lower die holder. The lower pressing assembly is fixedly connected to the top of the gantry frame. The upper die holder is located inside the gantry frame and slidably connected to the inner wall of the gantry frame. The lower pressing end of the lower pressing assembly is fixedly connected to the upper surface of the upper die holder. The lower die holder is located below the upper die holder and fixedly connected to the gantry frame. A self-rotating forging pressing component with an anvil is provided between the upper die holder and the lower die holder. The self-rotating forging pressing component with an anvil includes an upper anvil, a cylindrical sliding column, a lower anvil, and a rotating assembly. The upper die holder has a vertical pressing groove on its lower surface. The top end of the cylindrical sliding column is located inside the vertical pressing groove and is slidably connected to the inner wall of the vertical pressing groove. The upper surface of the cylindrical sliding column is connected to the inner wall of the vertical pressing groove through the spin assembly. The bottom end of the cylindrical sliding column is fixedly connected to the upper surface of the upper forging anvil. The upper surface of the lower die holder is connected to the fixed end of the adaptive swing assembly. The movable end of the adaptive swing assembly is fixedly connected to the lower surface of the lower forging anvil.

[0009] The spin assembly includes a sliding block, a preload spring, and a rigid impact member. Several limiting sliding grooves are inclinedly arranged on the inner wall of the vertical downward pressing groove, and these limiting sliding grooves are evenly distributed circumferentially along the axis of the vertical downward pressing groove. One end of the sliding block is fixedly connected to the side wall of the cylindrical sliding column, and the other end of the sliding block is slidably connected to the inner wall of the limiting sliding groove within the groove. The preload spring is sleeved on the outside of the rigid impact member. The top end of the preload spring is fixedly connected to the top surface of the inner wall of the vertical downward pressing groove, and the bottom end of the preload spring is fixedly connected to the upper surface of the cylindrical sliding column. The top end of the rigid impact member is connected to the top surface of the inner wall of the vertical downward pressing groove, and the bottom end of the rigid impact member is connected to the upper surface of the cylindrical sliding column.

[0010] The rigid impact member includes an impact column, the upper surface of which is provided with an impact groove. The top end of the impact column is fixedly connected to the top surface of the inner wall of the vertical downward sliding groove, and the bottom end of the impact column is located in the impact groove and is slidably connected to the inner wall of the impact groove.

[0011] The adaptive swing assembly includes a ball head and a return spring. The upper surface of the lower die base is provided with a hemispherical groove. The bottom end of the ball head is located in the hemispherical groove and forms a ball joint connection with the hemispherical groove. The top end of the ball head is fixedly connected to the lower surface of the lower forging anvil. Several return springs are provided and are evenly distributed around the center of the ball head. The top end of the return spring is fixedly connected to the lower surface of the lower forging anvil, and the bottom end of the return spring is fixedly connected to the upper surface of the lower die base.

[0012] The angle between the extension direction of the limiting sliding groove and the axial direction of the vertical pressing sliding groove is 15° to 30°.

[0013] The sliding block includes a rotating shaft and a rotating column. One end of the rotating shaft is fixedly connected to the side wall of the cylindrical sliding column, and the other end of the rotating shaft is rotatably connected to the rotating column. The rotating column is located in the limiting sliding groove and is slidably connected to the inner wall of the limiting sliding groove.

[0014] At least two rotating columns are provided, and the rotating columns are distributed along the extension direction of the limiting sliding groove.

[0015] Compared with the prior art, this utility model has the following beneficial effects: By forcibly rotating the upper forging anvil, the static friction between the upper forging anvil and the upper surface of the workpiece is transformed into dynamic friction, avoiding the obstruction of material flow caused by excessive frictional resistance on the upper surface, improving the radial fluidity of the material near the upper surface, thereby enhancing the deformation effect of a single forging, reducing the number of forging operations and improving forging efficiency; By adaptively and slightly oscillating the lower forging anvil, the static friction between the lower forging anvil and the lower surface of the workpiece is transformed into dynamic friction, avoiding the obstruction of material flow by friction on the lower surface, improving the radial fluidity of the material near the lower surface, thereby enhancing the deformation effect of a single forging, reducing the number of forging operations and improving forging efficiency; By introducing a rigid impact at the end of the stroke, stress waves are generated on the workpiece and impact loads are formed, promoting the plastic flow of the material, thereby improving forging efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a side view of the cross-sectional structure of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the cylindrical sliding column of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure inside the upper mold base of this utility model;

[0020] Figure 5 This utility model Figure 2 A magnified structural diagram of point A is shown below;

[0021] Figure 6 This utility model Figure 2 A magnified structural diagram of point B is shown.

[0022] 1. Gantry frame; 2. Lower pressing assembly; 3. Upper die base; 4. Lower die base; 5. Upper forging anvil; 6. Cylindrical sliding column; 7. Lower forging anvil; 8. Vertical downward pressing groove; 9. Sliding block; 10. Preload spring; 11. Limiting sliding groove; 12. Impact column; 13. Impact groove; 14. Ball head; 15. Return spring; 16. Hemispherical groove; 17. Rotating shaft; 18. Rotating column. Detailed Implementation

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0024] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0025] like Figure 1-2 As shown, a forging press for automotive parts includes a gantry frame 1, a lower pressing assembly 2, an upper die holder 3, and a lower die holder 4. The lower pressing assembly 2 is fixedly connected to the top of the gantry frame 1. The upper die holder 3 is located inside the gantry frame 1 and slidably connected to the inner wall of the gantry frame 1. The lower pressing end of the lower pressing assembly 2 is fixedly connected to the upper surface of the upper die holder 3. The lower die holder 4 is located below the upper die holder 3 and fixedly connected to the gantry frame 1. A self-rotating forging anvil is provided between the upper die holder 3 and the lower die holder 4. The self-rotating forging anvil includes an upper forging anvil 5, a cylindrical sliding column 6, and a lower forging anvil 5. The anvil 7, the spin assembly, and the adaptive swing assembly are provided. The lower surface of the upper die base 3 is provided with a vertical pressing groove 8. The top end of the cylindrical sliding column 6 is located in the vertical pressing groove 8 and is slidably connected to the inner wall of the vertical pressing groove 8. The upper surface of the cylindrical sliding column 6 is connected to the inner wall of the vertical pressing groove 8 through the spin assembly. The bottom end of the cylindrical sliding column 6 is fixedly connected to the upper surface of the upper forging anvil 5. The upper surface of the lower die base 4 is connected to the fixed end of the adaptive swing assembly. The movable end of the adaptive swing assembly is fixedly connected to the lower surface of the lower forging anvil 7.

[0026] like Figure 2-5As shown, the spin assembly includes a sliding block 9, a preload spring 10, and a rigid impact member. Several limiting sliding grooves 11 are inclinedly arranged on the inner wall of the vertical pressing groove 8. The limiting sliding grooves 11 are evenly distributed circumferentially along the axis of the vertical pressing groove 8. One end of the sliding block 9 is fixedly connected to the side wall of the cylindrical sliding column 6, and the other end of the sliding block 9 is located inside the limiting sliding groove 11 and is slidably connected to the inner wall of the limiting sliding groove 11. The preload spring 10 is sleeved on the outside of the rigid impact member. The top end of the preload spring 10 is fixedly connected to the top surface of the inner wall of the vertical pressing groove 8, and the bottom end of the preload spring 10 is fixedly connected to the upper surface of the cylindrical sliding column 6. The top end of the rigid impact member is connected to the top surface of the inner wall of the vertical pressing groove 8, and the bottom end of the rigid impact member is connected to the upper surface of the cylindrical sliding column 6.

[0027] like Figure 2-5 As shown, the rigid impact member includes an impact column 12, an impact groove 13 on the upper surface of a cylindrical sliding column 6, the top end of the impact column 12 is fixedly connected to the top surface of the inner wall of the vertically downward sliding groove 8, and the bottom end of the impact column 12 is located in the impact groove 13 and is slidably connected to the inner wall of the impact groove 13.

[0028] like Figure 2 and Figure 6 As shown, the adaptive swing assembly includes a ball head 14 and a return spring 15. The upper surface of the lower die base 4 is provided with a hemispherical groove 16. The bottom end of the ball head 14 is located in the hemispherical groove 16 and forms a ball joint connection with the hemispherical groove 16. The top end of the ball head 14 is fixedly connected to the lower surface of the lower forging anvil 7. Several return springs 15 are provided. The return springs 15 are evenly distributed around the center of the ball head 14. The top end of the return spring 15 is fixedly connected to the lower surface of the lower forging anvil 7, and the bottom end of the return spring 15 is fixedly connected to the upper surface of the lower die base 4.

[0029] like Figure 4-5 As shown, the angle between the extension direction of the limiting sliding groove 11 and the axial direction of the vertical pressing sliding groove 8 is 15° to 30°.

[0030] like Figure 3 As shown, the sliding block 9 includes a rotating shaft 17 and a rotating column 18. One end of the rotating shaft 17 is fixedly connected to the side wall of the cylindrical sliding column 6, and the other end of the rotating shaft 17 is rotatably connected to the rotating column 18. The rotating column 18 is located in the limiting sliding groove 11 and is slidably connected to the inner wall of the limiting sliding groove 11.

[0031] like Figure 3 As shown, at least two rotating columns 18 are provided, and the rotating columns 18 are distributed along the extension direction of the limiting sliding groove 11.

[0032] The work process is as follows:

[0033] S1, during use, place the workpiece to be forged at the center of the lower forging anvil 7, start the pressing assembly 2, the pressing assembly 2 drives the upper die base 3 to move downward along the inner wall of the gantry 1, the vertical pressing groove 8 fixed on the upper die base 3 moves downward synchronously, the pre-compression spring 10 located in the vertical pressing groove 8 is in a pre-compressed state, the force is transmitted to the cylindrical sliding column 6 through the bottom end of the pre-compression spring 10, pushing the cylindrical sliding column 6 and the upper forging anvil 5 at the bottom end of the cylindrical sliding column 6 to contact the workpiece downward. As the upper die base 3 continues to press down, the cylindrical sliding column 6 is subjected to the reaction force from the workpiece, generating a relative upward movement tendency with respect to the vertical pressing groove 8, the sliding block 9 fixed to the side wall of the cylindrical sliding column 6 in the inclined limiting sliding groove 11 Under the constraint, it is forced to slide along the limiting sliding groove 11. The inclined surface of the limiting sliding groove 11 decomposes the axial motion and generates a tangential component force. This component force is transmitted to the cylindrical sliding column 6 through the sliding block 9, forcibly driving the cylindrical sliding column 6 and the upper forging anvil 5 to rotate. During this process, the static friction between the upper forging anvil 5 and the upper surface of the workpiece is transformed into dynamic friction. After the frictional resistance is reduced, the radial flowability of the material near the upper surface of the workpiece is enhanced. Through the forced rotation of the upper forging anvil 5, the static friction between the upper forging anvil 5 and the upper surface of the workpiece is transformed into dynamic friction, avoiding the material flow obstruction caused by excessive frictional resistance on the upper surface, improving the radial flowability of the material near the upper surface, thereby enhancing the deformation effect of a single forging, reducing the number of forging operations and improving forging efficiency.

[0034] S2, during the pressing process, the rotating upper forging anvil 5 transmits a torsional tendency through the workpiece to the lower forging anvil 7 via friction. The lower forging anvil 7 is connected to the hemispherical groove 16 on the lower die base 4 via the ball head 14, thus gaining the freedom to swing. The torque from the workpiece causes the lower forging anvil 7 to overcome the elastic force of the return spring 15, producing an adaptive slight swing. This slight swing breaks the static friction state between the lower forging anvil 7 and the lower surface of the workpiece, transforming static friction into dynamic friction, thereby reducing the frictional resistance of the lower surface of the workpiece and simultaneously enhancing the radial flowability of the material near the lower surface of the workpiece. Through the adaptive slight swing of the lower forging anvil 7, the static friction between the lower forging anvil 7 and the lower surface of the workpiece is transformed into dynamic friction, avoiding the obstruction of material flow by the lower surface friction, improving the radial flowability of the material near the lower surface, thereby enhancing the deformation effect of a single forging, reducing the number of forging operations and improving forging efficiency.

[0035] S3, during the pressing process, the impact column 12 slides continuously downward along the impact groove 13. When the cylindrical sliding column 6 moves to the preset limit position relative to the vertical pressing groove 8, the end face of the impact groove 13 makes rigid contact with the bottom end of the impact column 12 and generates an impact. This impact is transmitted to the core of the workpiece through the upper forging anvil 5, promoting the plastic deformation of the material inside the workpiece and converting the elastic deformation inside the workpiece into plastic deformation. By introducing a rigid impact at the end of the stroke, stress waves are generated on the workpiece and an impact load is formed, which promotes the plastic flow of the material and thus improves the forging efficiency.

[0036] The rigid contact process is essentially an instantaneous switch of the force transmission path. Before this, the pressure is mainly transmitted elastically by the compressed preload spring 10. At the moment of contact, the path switches to rigid transmission between the impact column 12 and the end face of the impact groove 13. Due to the sudden change in stiffness, part of the elastic potential energy in the preload spring 10 is converted into an impact load in the form of a stress wave. At the same time, a rigid impact is generated at the moment of rigid contact, which is efficiently transmitted to the core of the workpiece through the upper anvil 5, thereby promoting the plastic flow of the material.

[0037] The angle between the extension direction of the limiting sliding groove 11 and the axis direction of the vertical downward sliding groove 8 is preferably 15° to 30°. If the angle is too small, the rotation speed will be too slow and the effect of reducing friction will not be significant. If the angle is too large, the required transmission torque will increase dramatically, which may cause jamming. The sliding block 9 is composed of a rotating shaft 17 and a rotating column 18, which transforms the sliding friction between the sliding block 9 and the limiting sliding groove 11 into rolling friction to reduce the coefficient of friction. At the same time, the provision of two or more rotating columns 18 increases the bearing contact area and improves the stability during the transmission process.

[0038] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A forging press for automotive parts, comprising a gantry (1), a pressing assembly (2), an upper die holder (3), and a lower die holder (4), wherein the pressing assembly (2) is fixedly connected to the top end of the gantry (1), the upper die holder (3) is located inside the gantry (1) and slidably connected to the inner wall of the gantry (1), the pressing end of the pressing assembly (2) is fixedly connected to the upper surface of the upper die holder (3), and the lower die holder (4) is located below the upper die holder (3) and fixedly connected to the gantry (1), characterized in that: A forging anvil spin-type forging component is provided between the upper die base (3) and the lower die base (4). The forging anvil spin-type forging component includes an upper forging anvil (5), a cylindrical sliding column (6), a lower forging anvil (7), a spin assembly, and an adaptive swing assembly. The lower surface of the upper die base (3) is provided with a vertical downward sliding groove (8). The top end of the cylindrical sliding column (6) is located inside the vertical downward sliding groove (8) and is slidably connected to the inner wall of the vertical downward sliding groove (8). The upper surface of the cylindrical sliding column (6) is connected to the inner wall of the vertical downward sliding groove (8) through the spin assembly. The bottom end of the cylindrical sliding column (6) is fixedly connected to the upper surface of the upper forging anvil (5). The upper surface of the lower die base (4) is connected to the fixed end of the adaptive swing assembly. The movable end of the adaptive swing assembly is fixedly connected to the lower surface of the lower forging anvil (7).

2. The forging press for automotive parts according to claim 1, characterized in that: The spin assembly includes a sliding block (9), a preload spring (10), and a rigid impact member. A plurality of limiting sliding grooves (11) are obliquely arranged on the inner wall of the vertical downward pressing groove (8). The limiting sliding grooves (11) are evenly distributed circumferentially along the axis of the vertical downward pressing groove (8). One end of the sliding block (9) is fixedly connected to the side wall of the cylindrical sliding column (6), and the other end of the sliding block (9) is located inside the limiting sliding groove (11) and connected to the limiting sliding groove (11). The inner wall of the rigid impact member is slidably connected, the preload spring (10) is sleeved on the outside of the rigid impact member, the top end of the preload spring (10) is fixedly connected to the top surface of the inner wall of the vertical downward sliding groove (8), the bottom end of the preload spring (10) is fixedly connected to the upper surface of the cylindrical sliding column (6), the top end of the rigid impact member is connected to the top surface of the inner wall of the vertical downward sliding groove (8), and the bottom end of the rigid impact member is connected to the upper surface of the cylindrical sliding column (6).

3. A forging press for automotive parts according to claim 2, characterized in that: The rigid impact member includes an impact column (12), and the upper surface of the cylindrical sliding column (6) is provided with an impact groove (13). The top end of the impact column (12) is fixedly connected to the top surface of the inner wall of the vertical downward sliding groove (8), and the bottom end of the impact column (12) is located in the impact groove (13) and is slidably connected to the inner wall of the impact groove (13).

4. A forging press for automotive parts according to claim 3, characterized in that: The adaptive swing assembly includes a ball head (14) and a return spring (15). The upper surface of the lower die base (4) is provided with a hemispherical groove (16). The bottom end of the ball head (14) is located in the hemispherical groove (16) and forms a ball joint connection with the hemispherical groove (16). The top end of the ball head (14) is fixedly connected to the lower surface of the lower forging anvil (7). There are several return springs (15). The return springs (15) are evenly distributed around the center of the ball head (14). The top end of the return spring (15) is fixedly connected to the lower surface of the lower forging anvil (7). The bottom end of the return spring (15) is fixedly connected to the upper surface of the lower die base (4).

5. A forging press for automotive parts according to claim 2, characterized in that: The angle between the extension direction of the limiting sliding groove (11) and the axial direction of the vertical pressing sliding groove (8) is 15° to 30°.

6. A forging press for automotive parts according to claim 2, characterized in that: The sliding block (9) includes a rotating shaft (17) and a rotating column (18). One end of the rotating shaft (17) is fixedly connected to the side wall of the cylindrical sliding column (6), and the other end of the rotating shaft (17) is rotatably connected to the rotating column (18). The rotating column (18) is located in the limiting sliding groove (11) and is slidably connected to the inner wall of the limiting sliding groove (11).

7. A forging press for automotive parts according to claim 6, characterized in that: At least two rotating columns (18) are provided, and the rotating columns (18) are distributed along the extension direction of the limiting sliding groove (11).

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