Dynamic supporting type spinning female die device

Abstract

The invention provides a dynamic supporting type spinning female die device, and relates to the field of spinning female dies. The invention provides a dynamic supporting type spinning female die device. The dynamic supporting type spinning female die device comprises a driving piece, a spinning female die and a supporting base. A mounting groove is formed in the top of the supporting seat, the spinning female die is arranged in the mounting groove, and the spinning female die is used for mounting a cylindrical part; a driving piece groove communicated with the mounting groove is further formed in the supporting seat, the driving piece is arranged in the driving piece groove, and a driving shaft of the driving piece is connected with the bottom of the spinning female die; a supporting roller is further arranged at the bottom of the spinning female die and can roll on the inner bottom face of the supporting base. Multi-point dynamic supporting can be formed through contact of the idler wheel and the inner bottom face of the supporting base, radial loads transmitted by the forming roller are dispersed, the risk that the spinning female die inclines is reduced, the stability of the spinning female die during rotation is improved, and reliable technical guarantee is provided for large-scale production of high-performance cylindrical parts.

Description

Technical Field

[0001] The present invention relates to the field of spinning female dies, and in particular to a spinning female die device with dynamic support. Background Art

[0002] With the increasing requirements of modern industrial manufacturing for part precision and structural strength, the metal spinning forming process has been widely used in the fields of aerospace, automotive manufacturing, pressure vessels, etc. due to its characteristics of high efficiency, high precision and low material loss. Especially in the processing of cylindrical parts (such as engine casings, hydraulic cylinder bodies, etc.), by forming a specific-shaped internal rib structure on the inner wall of the cylinder through the spinning process, the compressive strength, anti-deformation ability and heat transfer performance of the part can be significantly improved, so as to meet the usage requirements under complex working conditions. However, there are still many technical bottlenecks in the actual application of traditional spinning processes. In particular, how to ensure the dynamic stability of the spinning female die during the processing has become a key issue restricting product quality and production efficiency.

[0003] In the prior art, the spinning female die is usually fixed on the support seat, and the female die is driven to rotate synchronously with the cylindrical part by a driving mechanism. At the same time, a forming roller is used to apply a radial pressure to the inner wall of the cylindrical part to form an internal rib. However, since the forming roller will generate a continuous radial thrust on the cylindrical part during the spinning process, this thrust will be transmitted to the spinning female die through the cylindrical part, resulting in an asymmetric load on the contact surface between the female die and the support seat. When the spinning female die rotates at a high speed, this uneven distribution of the load will cause a slight tilt or offset of the female die, which will further lead to the following problems: First, the fit between the cylindrical part and the inner wall of the female die decreases, resulting in dimensional deviation or surface quality defects in the forming of the internal rib; Second, the connection part between the female die and the driving shaft bears an additional bending moment, accelerating mechanical wear and even causing equipment failures; Third, the lack of process stability will lead to an increase in the rejection rate, especially obvious in the processing of thin-walled cylindrical parts or high-precision parts.

[0004] To solve the above problems, the industry has tried to improve the system stability by strengthening the stiffness of the support seat, optimizing the material of the female die or adding auxiliary fixing devices, etc. However, these solutions often have limitations. For example, using a high-stiffness support seat can relieve deformation, but it will increase the equipment weight and manufacturing cost; while additional fixing devices may limit the free rotation of the female die or introduce new vibration sources. In addition, during the dynamic spinning process, the frictional resistance between the female die and the support seat will increase with the increase of the rotation speed, further affecting the rotation accuracy. Therefore, how to effectively offset the radial thrust generated by the forming roller and maintain the dynamic balance of the system while ensuring the high-speed rotation of the spinning female die has become a technical difficulty that needs to be broken through in this field. Summary of the Invention

[0005] To solve the above problems, the present invention provides a dynamic support type spinning female die device, which can disperse the radial load transmitted by the forming roller, reduce the risk of tilting of the spinning female die, improve the stability of the spinning female die during rotation, and provide reliable technical support for the large-scale production of high-performance cylindrical parts.

[0006] A dynamic support type spinning female die device provided by the present invention includes a driving member, a spinning female die, and a support seat; an installation groove is provided at the top of the support seat, the spinning female die is arranged in the installation groove, and the spinning female die is used for installing a cylindrical part; a driving member groove communicated with the installation groove is further provided in the support seat, the driving member is arranged in the driving member groove, and a driving shaft of the driving member is connected to the bottom of the spinning female die; support rollers are further provided at the bottom of the spinning female die, and the support rollers can roll on the inner bottom surface of the support seat.

[0007] In a feasible embodiment, legs are provided at the bottom of the support seat, and leg grooves are further provided in the support seat, and the legs are located in the leg grooves; support tracks are provided on the inner bottom surface of the leg grooves, the support rollers can roll on the support tracks, a plurality of support rollers are provided at the bottom of the legs and are arranged in sequence along the extending direction of the legs.

[0008] In a feasible embodiment, the number of the legs is 5 to 12, and the intervals between adjacent legs are the same.

[0009] In a feasible embodiment, connecting rollers are provided on the outer wall of the spinning female die, support roller grooves are provided in the side wall of the support seat, connecting roller grooves are provided in the inner wall of the support seat, support rollers are provided at one end of the connecting roller away from the spinning female die, the connecting rollers are located in the connecting roller grooves, and the support rollers are located in the support roller grooves.

[0010] In a feasible embodiment, top rollers are provided at the top of the support rollers, bottom rollers are provided at the bottom of the support rollers, the top rollers can roll on the inner top surface of the support roller grooves, and the bottom rollers can roll on the inner bottom surface of the support roller grooves.

[0011] In a feasible embodiment, top tracks matching the top rollers are provided on the inner top surface of the support roller grooves, and the top rollers can roll on the top tracks; and / or, bottom tracks matching the bottom rollers are provided on the inner bottom surface of the support roller grooves, and the bottom rollers can roll on the bottom tracks.

[0012] In a feasible embodiment, the number of the support rollers is 5 to 12, and the intervals between adjacent support rollers are the same.

[0013] In a feasible implementation manner, the driving member is any one of a stepping motor, a DC reduction motor or a servo motor.

[0014] In a feasible implementation manner, the installation groove and the support roller groove are filled with liquid, and a liquid inlet channel for liquid inlet is further provided in the side wall of the support base.

[0015] The present invention provides a method for using a dynamic support type spinning female die device, which includes the following steps:

[0016] Step 1) The drive shaft of the driving member rotates, and the spinning female die rotates synchronously with the drive shaft of the driving member;

[0017] Step 2) The support roller rolls on the inner bottom surface of the support base.

[0018] The dynamic support type spinning female die device provided by the present invention has the following beneficial effects: In the present invention, when the spinning female die rotates, the support rollers located at the bottom of the spinning female die will roll on the inner bottom surface of the support base, so that the contact between the rollers and the inner bottom surface of the support base forms multi-point dynamic support, dispersing the radial load transmitted by the forming roller and reducing the risk of tilting of the spinning female die, improving the stability of the spinning female die during rotation, and providing a reliable technical guarantee for the large-scale production of high-performance cylindrical parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a sectional view of the present invention after loading a cylindrical part.

[0020] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 3 It is a top view of the present invention.

[0022] REFERENCE MARKS

[0023] Driving member 1

[0024] Spinning female die 2

[0025] Leg 21

[0026] Support roller 21.1

[0027] Connecting roller 22

[0028] Support roller 23

[0029] Top roller 23.1

[0030] Bottom roller 23.2

[0031] Support base 3

[0032] Leg groove 31

[0033] Support rail 31.1

[0034] Installation groove 32

[0035] Driver groove 33

[0036] Support roller groove 34

[0037] Top rail 34.1

[0038] Bottom rail 34.2

[0039] Connecting roller groove 35

[0040] Liquid inlet channel 36

[0041] Forming roller 4

[0042] Cylindrical part 5 Detailed implementation mode

[0043] 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 only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "left side", "right side", "upper side", "lower side", "above", "below", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] In addition, in the description of the present invention, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0046] The embodiment of the present invention provides a dynamic support type spinning female die device. Refer toFigure 1 , including a driving member 1, a spinning female die 2 and a support base 3. An installation groove 32 is provided at the top of the support base 3. The spinning female die 2 is arranged in the installation groove 32. The spinning female die 2 is used to install a tubular part 5. Generally speaking, the shape of the spinning female die 2 is the same as that of the tubular part 5, and the outer wall of the tubular part 5 can be attached to the inner wall of the spinning female die 2 during the spinning process. A driving member groove 33 communicating with the installation groove 32 is also provided in the support base 3. The driving member 1 is arranged in the driving member groove 33. The driving shaft of the driving member 1 is connected to the bottom of the spinning female die 2. A support roller 21.1 is further provided at the bottom of the spinning female die 2. The support roller 21.1 can roll on the inner bottom surface of the support base 3. The driving member 1 is any one of a stepping motor, a DC reduction motor or a servo motor, preferably a servo motor. When the driving shaft of the driving member 1 rotates, the spinning female die 2 rotates synchronously with the driving shaft of the driving member 1. When the spinning female die 2 rotates, the tubular part 5 also rotates synchronously with the spinning female die 2. At this time, a forming roller 4 is usually introduced into the inner cavity of the tubular part 5, and then the forming roller 4 is gradually brought close to the inner wall of the tubular part 5. Because there are multiple protrusions on the forming roller 4 and the spinning female die 2 is rotating continuously, after the forming roller 4 contacts the inner wall of the tubular part 5, it will gradually spin the inner wall of the tubular part 5, so that multiple internal ribs are formed on the inner wall of the tubular part 5, thus completing the spinning process. Then, during the above spinning process, the forming roller 4 will generate a certain radial load on the spinning female die 2 during the spinning process. This radial load may cause the spinning female die 2 to tilt and the spinning female die 2 to be dynamically unstable, resulting in problems such as insufficient processing accuracy and shortened equipment life. Therefore, in the present invention, when the spinning female die 2 rotates, the support roller 21.1 located at the bottom of the spinning female die 2 will roll on the inner bottom surface of the support base 3, so that the contact between the roller and the inner bottom surface of the support base 3 forms a multi-point dynamic support, dispersing the radial load transmitted by the forming roller 4 and reducing the risk of tilting of the spinning female die 2, improving the stability of the spinning female die 2 during rotation, and providing a reliable technical guarantee for the large-scale production of high-performance tubular parts 5.

[0047] The dynamically supported spinning female die device provided by the embodiment of the present invention, refer to Figure 1, legs 21 are provided at the bottom of the support base 3, and a leg groove 31 is further provided in the support base 3, and the leg 21 is located in the leg groove 31. A support rail 31.1 is provided on the inner bottom surface of the leg groove 31, and the support roller 21.1 can roll on the support rail 31.1. The support rail 31.1 can provide guidance and a certain amount of support for the rolling of the support roller 21.1, further improving the stability of the spinning female die 2 during rotation. The support rollers 21.1 are provided at the bottom of the leg 21 and there are multiple of them. The support rollers 21.1 are arranged in sequence along the extending direction of the leg 21. Further, the number of the legs 21 is 5 to 12, preferably 6, and the intervals between adjacent legs 21 are the same.

[0048] For the dynamic support type spinning female die device provided by the embodiment of the present invention, refer to Figure 1 , a connecting roller 22 is provided on the outer wall of the spinning female die 2, a support roller groove 34 is provided in the side wall of the support base 3, and a connecting roller groove 35 is provided in the inner wall of the support base 3. A support roller 23 is provided at one end of the connecting roller 22 away from the spinning female die 2. Generally speaking, the connecting roller 22 and the support roller 23 are integrally formed. An angle can be formed between the connecting roller 22 and the support roller 23, but optimally the connecting roller 22 and the support roller 23 are vertically arranged. The connecting roller 22 is located in the connecting roller groove 35, and the support roller 23 is located in the support roller groove 34. It can be understood that both the connecting roller groove 35 and the support roller groove 34 should be annular so that the connecting roller 22 and the support roller 23 can achieve circumferential rotation. In addition, there should be no contact between the inner wall of the connecting roller groove 35 and the connecting roller 22 to avoid the frictional force generated during the rotation of the connecting roller 22. The inner top surface and the inner bottom surface of the support roller groove 34 should be in contact with the support roller 23 to form a sliding friction, so as to make the rotation of the spinning female die 2 more stable, and there may be no contact between the inner wall of the support roller groove 34 and the outer wall of the support roller 23. In a feasible embodiment, the number of the support rollers 23 is 5 to 12, preferably 6, and the intervals between adjacent support rollers 23 are the same.

[0049] For the dynamic support type spinning female die device provided by the embodiment of the present invention, refer to Figure 1 , a top roller 23.1 is provided at the top of the support roller 23, and a bottom roller 23.2 is provided at the bottom of the support roller 23. The top roller 23.1 can roll on the inner top surface of the support roller groove 34, and the bottom roller 23.2 can roll on the inner bottom surface of the support roller groove 34. It can be understood that both the top roller 23.1 and the bottom roller 23.2 can convert the original sliding friction between the support roller 23 and the support roller groove 34 into rolling friction, and can reduce the wear of the contact surface between the support roller 23 and the support roller groove 34 while maintaining a certain amount of support force.

[0050] The spinning female die device with dynamic support provided by the embodiments of the present invention is shown in Figure 1 , on the inner top surface of the support roller groove 34, there is a top track 34.1 matching the top roller 23.1, and the top roller 23.1 can roll on the top track 34.1. On the inner bottom surface of the support roller groove 34, there is a bottom track 34.2 matching the bottom roller 23.2, and the bottom roller 23.2 can roll on the bottom track 34.2. It can be understood that whether it is the top track 34.1 or the bottom track 34.2, their functions are to provide guidance and support for the rolling of the rollers, so as to improve the stability of the spinning female die 2 during rotation.

[0051] The spinning female die device with dynamic support provided by the embodiments of the present invention is shown in Figure 1 , the installation groove 32 and the support roller groove 34 are filled with liquid, and a liquid inlet channel 36 for liquid inlet is also provided in the side wall of the support seat 3. As an illustration, before spinning the cylindrical part 5, a certain volume of liquid can be first poured into the installation groove 32 and the support roller groove 34. This liquid can be water or other non-corrosive aqueous solutions. During the rotation of the spinning female die 2, although the presence of the liquid will provide resistance to the rotation of the spinning female die 2, the pressure between the liquid and the outer wall of the spinning female die 2 will also prevent the inclination of the spinning female die 2 during the spinning process, and the liquid inlet channel 36 can enable the liquid delivery pipe of the external pump body to pass through, making it more convenient for the external pump body to feed liquid into the installation groove 32 and the support roller groove 34.

[0052] The present invention also provides a method for using a spinning female die, including the following steps:

[0053] Step 1) The drive shaft of the driving member 1 rotates, and the spinning female die 2 rotates synchronously with the drive shaft of the driving member 1; further, before the driving member 1 rotates, a certain volume of water is first poured into the installation groove 32 and the support roller groove 34;

[0054] Step 2) The support roller 21.1 rolls on the inner bottom surface of the support seat 3; further, the support roller 21.1 rolls on the support track 31.1 in the leg groove 31 of the support roller 21.1, the top roller 23.1 on the support roller 23 rolls on the top track 34.1, and the bottom roller 23.2 on the support roller 23 rolls on the bottom track 34.2.

[0055] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A dynamically supported spinning die device, characterized in that: The invention comprises a driving member (1), a spinning die (2) and a support seat (3); the support seat (3) is provided with a mounting groove (32) at the top, the spinning die (2) is arranged in the mounting groove (32), and the spinning die (2) is used to mount a cylindrical member; the support seat (3) is also provided with a driving member groove (33) connected to the mounting groove (32), the driving member (1) is arranged in the driving member groove (33), and the driving shaft of the driving member (1) is connected to the bottom of the spinning die (2); The bottom of the spinning die (2) is also provided with a supporting roller (21.1), and the supporting roller (21.1) can roll on the inner bottom surface of the supporting seat (3).

2. The dynamically supported spinning die device according to claim 1, characterized in that: A support leg (21) is provided at the bottom of the support seat (3), and a support leg groove (31) is also provided in the support seat (3), and the support leg (21) is located in the support leg groove (31); a support track (31.1) is provided on the inner bottom surface of the support leg groove (31), and the support roller (21.1) can roll on the support track (31.1); the support roller (21.1) is arranged at the bottom of the support leg (21) and is provided in plurality, and the support rollers (21.1) are arranged in sequence along the extension direction of the support leg (21).

3. The dynamically supported spinning die device according to claim 2, characterized in that: The number of the supporting legs (21) is 5 to 12, and the intervals between adjacent supporting legs (21) are the same.

4. The dynamically supported spinning die device according to claim 1, characterized in that: A connecting roller (22) is provided on the outer wall of the spinning die (2), a supporting roller groove (34) is provided in the side wall of the supporting seat (3), a connecting roller groove (35) is provided in the inner wall of the supporting seat (3), a supporting roller (23) is provided at one end of the connecting roller (22) away from the spinning die (2), the connecting roller (22) is located in the connecting roller groove (35), and the supporting roller (23) is located in the supporting roller groove (34).

5. The dynamically supported spinning die device according to claim 4, characterized in that: A top roller (23.1) is provided at the top of the support roller (23), and a bottom roller (23.2) is provided at the bottom of the support roller (23). The top roller (23.1) can roll on the inner top surface of the support roller groove (34), and the bottom roller (23.2) can roll on the inner bottom surface of the support roller groove (34).

6. The dynamically supported spinning die device according to claim 5, characterized in that: A top track (34.1) matching with the top roller (23.1) is provided on the inner top surface of the support roller groove (34), and the top roller (23.1) can roll on the top track (34.1); and / or, a bottom track (34.2) matching with the bottom roller (23.2) is provided on the inner bottom surface of the support roller groove (34), and the bottom roller (23.2) can roll on the bottom track (34.2).

7. The dynamically supported spinning die device according to claim 4, characterized in that: The number of the support rollers (23) is 5 to 12, and the intervals between adjacent support rollers (23) are the same.

8. The dynamically supported spinning die device according to claim 1, characterized in that: The driving component (1) is any one of a stepping motor, a DC reduction motor or a servo motor.

9. The dynamically supported spinning die device according to claim 1, characterized in that: The installation groove (32) and the support roller groove (34) are loaded with liquid, and a liquid inlet channel (36) for inletting liquid is also provided in the side wall of the support seat (3).

10. A method for using the dynamically supported spinning die device according to any one of claims 1 to 9, comprising the following steps: Step 1) The driving shaft of the driving member (1) rotates, and the spinning die (2) rotates synchronously with the driving shaft of the driving member (1); Step 2) The supporting roller (21.1) rolls on the inner bottom surface of the supporting seat (3).

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