An automatic centering quick-change hollow chuck for a double-roller high-power spinning machine and its usage method

Abstract

This invention provides an automatic centering quick-change hollow chuck for a double-roller high-power spinning machine and its usage method; it includes: a chuck body (4), several clamp seats (5), a turntable bearing (3), and a main shaft lifting plate (1); wherein, the clamp seats (5) are connected to the chuck body (4) through radial grooves on the upper surface of the chuck body (4); the chuck body (4) is mounted on the main shaft lifting plate (1) through the turntable bearing (3); the clamp seats (5) include: an inner jaw (13), an outer jaw (14), an adjusting stud (15), and a disc spring (16). This invention also relates to the usage method of the aforementioned automatic centering quick-change hollow chuck for a double-roller high-power spinning machine. The automatic centering quick-change hollow chuck for a double-roller high-power spinning machine involved in this invention has the characteristics of large-space hollow, automatic centering, and quick change of spun blanks and workpieces. Compared with traditional chucks, it has a simple structure and low manufacturing cost, and effectively solves the problem that traditional chucks cannot be applied to large double-roller spinning machines.

Description

Technical Field

[0001] This invention relates to the field of equipment technology for spinning thin-walled metal cylinders; and more particularly to an automatic centering quick-change hollow chuck for a double-roller high-power spinning machine and its usage method. Background Technology

[0002] This invention relates to the field of equipment technology for spinning thin-walled metal cylinders; and more particularly to an automatic centering quick-change hollow chuck for a double-roller high-power spinning machine and its usage method. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic centering quick-change hollow chuck for a high-power spinning machine and its usage method, which solves the problems of insufficient clamping force of traditional large chucks, making it difficult to stably clamp ultra-large size spinning cylinder blanks, unable to clamp ultra-large hollow blanks, and difficult centering.

[0004] This invention is achieved through the following technical solution:

[0005] This invention relates to an automatic centering quick-change hollow chuck for a double-roller high-power spinning machine, comprising: a chuck body 4 and a plurality of clamp seats 5; wherein, the clamp seats 5 are connected to the chuck body 4 through radial grooves on the upper surface of the chuck body 4;

[0006] The fixture base 5 includes: an inner jaw 13, an outer jaw 14, an adjusting stud 15, and a disc spring 16. When changing blanks of the same size in the same batch, the already spun blank (i.e., the workpiece) can be directly pulled out from the jaw, and the new blank can be directly pressed into the jaw to achieve quick blank change. The adjusting stud 15 and the disc spring 16 can ensure that the blank is clamped, while the fixture base 5 does not move. The inner jaw 13 fixed on the fixture base 5 can ensure that the blank is centered and does not need to be re-centered, thereby realizing quick change of cylindrical blanks.

[0007] Preferably, the clamp seat 5 slides radially within a radial groove on the upper surface of the chuck body 4. This accommodates the spinning of large, thin-walled cylindrical parts of varying diameters and allows for centering operations using an external rotating wheel.

[0008] Preferably, the chuck body 4 is mounted on the spindle lifting plate 1 via the turntable bearing 3.

[0009] Preferably, the turntable bearing 3 includes a geared turntable outer ring 10 and a turntable inner ring 11; wherein, the turntable inner ring 11 is fixed on the upper surface of the main shaft lifting plate 1, the chuck body 4 is fixed on the upper surface of the geared turntable outer ring 10, the rotary motor 2 is fixed on the lower part of the main shaft lifting plate 1, its output shaft passes through the main shaft lifting plate 1, and the shaft end is connected to the drive gear 9, which meshes with the gear of the geared turntable outer ring 10.

[0010] Preferably, the inner jaw 13 is fixed on the inner side of the chuck body 4, and the radially movable outer jaw 14 is installed in the chuck groove on its outer side. The outer jaw 14 is tightened by an adjusting stud 15, and a disc spring 16 is provided between the outer jaw 14 and the adjusting stud 15. A long screw passes through the hollow adjusting stud 15 and connects to the outer jaw 14 to prevent it from coming out.

[0011] Preferably, the bottom of the clamp seat 5 is provided with an embedded stop cone 12; the tip of the stop cone 12 can be inserted into the bottom of the cylindrical blank 7.

[0012] This invention also relates to a method of using the aforementioned automatic centering quick-change hollow chuck for a double-roller high-power spinning machine, comprising the following steps:

[0013] Step 1, Centering operation of the billet

[0014] Place the cylindrical blank 7 between the inner jaw 13 and the outer jaw 14 of the clamp seat 5. Rotate the chuck body 4 and feed the outer rotating wheel 6 radially until the outer rotating wheel 6 is in full contact with the outer surface of the thin-walled cylindrical blank. Use the outer rotating wheel 6 for centering. Then tighten the adjusting stud 15 to press the disc spring 16 and clamp the outer jaw 14 and the inner jaw 13. Finally, tighten the clamp seat 5 to complete the centering operation of the blank.

[0015] Step 2, Spinning

[0016] The spindle lifting plate 1 lifts the chuck body 4 upward through the turntable bearing 3. The chuck body 4 then lifts the fixture seat 5. The fixture seat 5 pushes the bottom of the cylindrical blank 7 upward through the stop cone 12 embedded in its bottom opening. Multiple inner rotating wheels 8 and outer rotating wheels 6 feed towards the cylindrical blank 7 simultaneously. When the spindle lifting plate 1 rises, the chuck body 4 and fixture seat 5 rotate under the drive of the rotary motor 2 and the drive gear 9. The inner rotating wheels 8 and outer rotating wheels 6 simultaneously apply a downward force to the cylindrical blank 7, causing the tip of the stop cone 12 to penetrate the bottom of the cylindrical blank 7, effectively preventing the cylindrical blank 7 from slipping. This enables the output torque of the rotary motor 2 to be transmitted to the cylindrical blank 7, completing the spinning process.

[0017] Preferably, step 1, the centering operation of the billet, specifically includes:

[0018] First, loosen the adjusting studs 15 of the outer jaws 14 on each clamp seat 5, so that the inner jaws 13 and the outer jaws 14 are in the open state;

[0019] Place the cylindrical blank 7 between the inner jaw 13 and the outer jaw 14 of the clamp seat 5, tighten the adjusting stud 15, and use the disc spring 16 to clamp the cylindrical blank 7 between the inner jaw 13 and the outer jaw 14; the clamp seat 5 moves freely along the radial groove on the upper surface of the chuck body 4 together with the cylindrical blank 7.

[0020] Start the rotary motor 2, which drives the geared turntable outer ring 10 to rotate at low speed through the drive gear 9. At the same time, the geared turntable outer ring 10 drives the chuck body 4 and the clamp seat 5 to rotate, and the cylindrical blank 7 rotates together.

[0021] Multiple outer rotating wheels 6 feed radially toward the center of the equipment. When all the outer rotating wheels 6 simultaneously contact the outer surface of the cylindrical blank 7, the outer circle center of the cylindrical blank 7 is concentric with the center of the equipment. The clamping screws of the clamp seat 5 are tightened in sequence, and the adjusting studs 15 of the outer jaw 14 are tightened appropriately to complete the automatic centering of the cylindrical blank 7.

[0022] Preferably, the adjusting stud 15 and the disc spring 16 are used to clamp the cylindrical blank 7 with the inner jaw 13 and the outer jaw 14, and to bring the inner jaw 13 into contact with the inner surface of the cylindrical blank 7.

[0023] The principle of the method of this invention is as follows: First, the blank is clamped on the chuck and then centered; then, the equipment's rotating wheels perform powerful spinning. During spinning, the torque of the main shaft is transmitted to the large-sized thin-walled cylindrical blank through the chuck and clamps to overcome the deformation resistance generated when the paired rotating wheels spin the large-sized thin-walled cylindrical blank; since the middle part of the large-sized double-wheel spinning machine is equipped with an inner rotating wheel device, its chuck is a large hollow structure to allow the inner rotating wheel device to move through the chuck and realize the spinning action.

[0024] The present invention has the following advantages:

[0025] (1) The multiple clamp seats involved in this invention are placed in the chuck body slide grooves arranged radially and uniformly. Each clamp seat can slide radially in the chuck body slide grooves individually, which can adapt to the clamping and spinning of large-sized thin-walled cylindrical parts of different diameters.

[0026] (2) The chuck involved in this invention is a hollow chuck, in which an inner rotating wheel device can be arranged in the middle; the freely sliding clamp seat uses the outer rotating wheel to quickly center the billet, and the centering operation of the billet can be completed by tightening the elastic jaws and the clamp seat in sequence.

[0027] (3) The bottom of the fixture seat 5 of the present invention is provided with an embedded stop cone 12. By using the pressure of the spinning wheel on the spindle during spinning, the cone tip is pressed into the blank to prevent the blank from slipping, realize the transmission of spindle torque, and complete the spinning process. The stop cone plays the role of preventing rotation and transmitting force.

[0028] (4) The automatic centering quick-change hollow chuck for the double-wheel high-power spinning machine involved in this invention has the characteristics of large space hollow, automatic centering and quick change of spinning blanks and workpieces. Compared with the traditional chuck, it has a simple structure and low manufacturing cost, which solves the problem that the traditional chuck cannot be applied to large double-wheel spinning machines. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an automatic centering quick-change hollow chuck for an ultra-large double-roller spinning press according to the present invention.

[0030] Figure 2 This is a cross-sectional view of an automatic centering quick-change hollow chuck for an ultra-large double-roller spinning press according to the present invention;

[0031] Figure 3 yes Figure 2 Enlarged view of the structure at point Z;

[0032] Figure 4 yes Figure 1 Enlarged view of the structure at point Y in the middle;

[0033] In the diagram, 1-spindle lifting plate, 2-rotary motor, 3-turntable bearing, 4-chuck body, 5-clamp seat, 6-outer rotating wheel, 7-cylinder blank, 8-inner rotating wheel, 9-drive gear, 10-outer ring of the geared turntable, 11-inner ring of the turntable, 12-stop cone, 13-inner jaw, 14-outer jaw, 15-adjusting stud, 16-disc spring. Detailed Implementation

[0034] The present invention will now be described in detail with reference to specific embodiments. It should be noted that the following embodiments are merely further illustrations of the present invention, but the scope of protection of the present invention is not limited to the following embodiments. Example

[0035] This embodiment relates to an automatic centering quick-change hollow chuck for a double-roller high-power spinning machine. See Figure 1 and Figure 2 As shown, it includes: a chuck body 4 and several clamp seats 5; wherein, the clamp seats 5 are connected to the chuck body 4 through radial grooves on the upper surface of the chuck body 4;

[0036] The fixture base 5 includes: an inner jaw 13, an outer jaw 14, an adjusting stud 15, and a disc spring 16. When changing blanks of the same size in the same batch, the already spun blank (i.e., the workpiece) can be directly pulled out from the jaw, and the new blank can be directly pressed into the jaw to achieve quick blank change. The adjusting stud 15 and the disc spring 16 can ensure that the blank is clamped, while the fixture base 5 does not move. The inner jaw 13 fixed on the fixture base 5 can ensure that the blank is centered and does not need to be re-centered, thereby realizing quick change of cylindrical blanks.

[0037] The clamp seat 5 slides radially within the radial grooves on the upper surface of the chuck body 4. This allows it to accommodate the spinning of large, thin-walled cylindrical parts of varying diameters and enables centering operations using an external rotating wheel.

[0038] The chuck body 4 is mounted on the spindle lifting plate 1 via the turntable bearing 3, and multiple clamp seats 5 are evenly arranged in the radial grooves on the upper surface of the chuck body 4. The cylindrical blank 7 is clamped in the clamp seat 5, and multiple outer rotating wheels 6 and inner rotating wheels 8 are evenly arranged around the circumference of the cylindrical blank 7.

[0039] like Figure 2 and Figure 3 As shown, the turntable bearing 3 includes a turntable outer ring 10 with gears and a turntable inner ring 11. The turntable inner ring 11 is fixed on the upper surface of the main shaft lifting plate 1. The chuck body 4 is fixed on the geared turntable outer ring 10. The rotary motor 2 is fixed at the lower part of the main shaft lifting plate 1. Its output shaft passes through the main shaft lifting plate 1, and the shaft end is connected to the drive gear 9. The drive gear 9 meshes with the gear of the geared turntable outer ring 10.

[0040] like Figure 4 As shown, the inner jaw 13 is fixed inside the chuck body 4, and the outer jaw 14, which can move radially, is installed in the outer jaw groove. The outer jaw 14 can be tightened by adjusting the stud 15. A disc spring 16 is provided between the outer jaw 14 and the adjusting stud 15. A long screw passes through the hollow adjusting stud 15 and connects to the outer jaw 14 to prevent it from coming out. An embedded stop cone 12 is arranged at the bottom of the fixture seat 5. The tip of the stop cone 12 can penetrate into the bottom of the cylindrical blank 7.

[0041] This embodiment also relates to the method of using the aforementioned automatic centering quick-change hollow chuck for a double-roller high-power spinning machine, including:

[0042] (1) During the centering operation, first loosen the adjusting studs 15 of the outer jaws 14 on each clamp seat 5, and loosen the clamping screws of the clamp seat 5. In this way, the entire jaw is in an open state, and the clamp seat 5 is in a free state in the slide groove. At this time, place the cylindrical blank 7 between the inner jaws 13 and the outer jaws 14 of the clamp seat 5, and then tighten the adjusting studs 15. With the help of the elasticity of the disc spring 16, the inner jaws 13 and the outer jaws 14 gently clamp the cylindrical blank. The clamp seat 5 can move freely along the radial slide groove on the upper surface of the chuck body 4 without disengaging from the cylindrical blank 7, ensuring that the inner jaws 13 always contact the inner surface of the cylinder and achieve accurate positioning. Start the rotary motor 2, and drive the geared turntable outer ring 10 to rotate at low speed through the drive gear 9. The geared turntable outer ring 10 drives the chuck body 4 and the clamp seat 5 to rotate, and the cylindrical blank 7 rotates together. Multiple outer rotating wheels 6 feed simultaneously along the radial center. When all the outer rotating wheels 6 contact the outer surface of the cylindrical blank 7 at the same time, since all the outer rotating wheels 6 are on the same circumference with the center of the equipment as the center, the outer circle center of the cylindrical blank 7 is concentric with the center of the equipment. Then, the clamping screws of the clamp seat 5 are tightened in sequence, and the adjusting studs 15 of the outer jaw 14 are tightened appropriately, thus realizing the automatic centering of the cylindrical blank 7.

[0043] (2) During spinning, the spindle lifting plate 1 lifts the chuck body 4 upward through the turntable bearing 3, and the chuck body 4 lifts the fixture seat 5. The fixture seat 5 pushes the bottom of the cylindrical blank 7 upward through the stop cone 12 embedded in its bottom. Multiple inner spinning wheels 8 and outer spinning wheels 6 feed towards the cylindrical blank 7 simultaneously. When the spindle lifting plate 1 rises, the chuck body 4 and fixture seat 5 rotate under the drive of the rotary motor 2 and the drive gear 9. The inner spinning wheels 8 and outer spinning wheels 6 simultaneously apply downward force to the cylindrical blank 7, causing the tip of the stop cone 12 to penetrate the bottom of the cylindrical blank 7, effectively preventing the cylindrical blank 7 from slipping, thereby realizing the transmission of the output torque of the rotary motor 2 to the cylindrical blank 7 and completing the spinning process.

[0044] Furthermore, the adjusting stud 15 and disc spring 16 involved are used to elastically clamp the inner jaw 13 and outer jaw 14 onto the cylindrical blank 7, ensuring that the inner jaw 13 reliably contacts the inner surface of the cylinder. Thus, after the spinning process is completed, the spun cylindrical blank 7 (i.e., the workpiece) can be directly removed from between the inner jaw 13 and outer jaw 14. Then, a new cylindrical blank 7 of the same size can be pressed in from between the inner jaw 13 and outer jaw 14, which have beveled edges. This process does not require loosening the adjusting stud 15 of the outer jaw 14, so the cylindrical blank 7 can be quickly replaced, and the centering position of the new cylindrical blank 7 can be kept unchanged.

[0045] This invention is particularly suitable for clamping, positioning and spinning of large cylindrical parts with a diameter of 2 meters or more, and can effectively improve the working efficiency of spinning.

[0046] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. An automatic centering quick-change hollow chuck for a double-roller high-power spinning machine, characterized in that, include: The chuck body (4) and several clamp seats (5); wherein the clamp seats (5) are connected to the chuck body (4) through radial grooves on the upper surface of the chuck body (4); The clamp base (5) includes: an inner jaw (13), an outer jaw (14), an adjusting stud (15), and a disc spring (16); The process of centering the billet using an automatic centering quick-change hollow chuck on this double-roller high-power spinning machine includes: First, loosen the adjusting studs (15) of the outer jaws (14) on each clamp seat (5) so that they are in the open state; Place the cylindrical blank (7) between the inner jaw (13) and outer jaw (14) of the clamp seat (5), tighten the adjusting stud (15), and use the disc spring (16) to clamp the cylindrical blank (7) between the inner jaw (13) and outer jaw (14); the clamp seat (5) moves freely along the radial groove on the upper surface of the chuck body (4) together with the cylindrical blank (7); Start the rotary motor (2), and drive the geared turntable outer ring (10) to rotate at low speed through the drive gear (9). At the same time, the geared turntable outer ring (10) drives the chuck body (4) and the clamp seat (5) to rotate, and the cylindrical blank (7) rotates together. Multiple outer rotating wheels (6) feed along the radial center. When all the outer rotating wheels (6) simultaneously contact the outer surface of the cylindrical blank (7), the outer circle center of the cylindrical blank (7) and the equipment center are concentric. The clamping screws of the clamp seat (5) are tightened in sequence, and the adjusting stud (15) of the outer jaw (14) is tightened appropriately to complete the automatic centering of the cylindrical blank (7).

2. The automatic centering quick-change hollow chuck for a double-roller high-power spinning machine as described in claim 1, characterized in that, The clamp seat (5) slides radially within the radial groove on the upper surface of the chuck body (4).

3. The automatic centering quick-change hollow chuck for a double-roller high-power spinning machine as described in claim 1, characterized in that, The chuck body (4) is mounted on the spindle lifting plate (1) via the turntable bearing (3).

4. The automatic centering quick-change hollow chuck for a double-roller high-power spinning machine as described in claim 3, characterized in that, The turntable bearing (3) includes a geared turntable outer ring (10) and a turntable inner ring (11); wherein, the turntable inner ring (11) is fixed on the upper surface of the main shaft lifting plate (1), the chuck body (4) is fixed on the upper surface of the geared turntable outer ring (10), the rotary motor (2) is fixed on the lower part of the main shaft lifting plate (1), its output shaft passes through the main shaft lifting plate (1), and the end of the output shaft is connected to the drive gear (9), which meshes with the gear of the geared turntable outer ring (10).

5. The automatic centering quick-change hollow chuck for a double-roller high-power spinning machine as described in claim 3, characterized in that, The inner jaw (13) is fixed on the inner side of the chuck body (4), and the outer jaw (14) is installed in the slot on the outer side.

6. The automatic centering quick-change hollow chuck for a double-roller high-power spinning machine as described in claim 1, characterized in that, The bottom of the opening of the clamp seat (5) is provided with an embedded stop cone (12).

7. A method of using an automatic centering quick-change hollow chuck for a double-roller high-power spinning machine as described in claim 1, characterized in that, Includes the following steps: Step 1, Centering operation of the billet Place the cylindrical blank (7) between the inner jaw (13) and outer jaw (14) of the clamp seat (5), rotate the chuck body (4), and feed the outer rotating wheel (6) radially until the outer rotating wheel (6) is in full contact with the outer surface of the thin-walled cylindrical blank. Use the outer rotating wheel (6) for centering. Then tighten the adjusting stud (15) to press the disc spring (16) to clamp the inner jaw (13) and outer jaw (14), and then tighten the clamp seat (5) to complete the centering operation of the blank. Step 2, Spinning The spindle lifting plate (1) lifts the chuck body (4) upward through the turntable bearing (3), and the chuck body (4) lifts the fixture seat (5). The fixture seat (5) pushes the bottom of the cylindrical blank (7) upward through the stop cone (12) embedded in its bottom. Multiple inner spinning wheels (8) and outer spinning wheels (6) feed into the cylindrical blank (7) at the same time. When the spindle lifting plate (1) rises, the chuck body (4) and fixture seat (5) rotate under the drive of the rotary motor (2) and the drive gear (9). The inner spinning wheels (8) and outer spinning wheels (6) apply downward force to the cylindrical blank (7) at the same time, so that the tip of the stop cone (12) is inserted into the bottom of the cylindrical blank (7). The rotary motor (2) outputs torque to the cylindrical blank (7) to complete the spinning process.

8. The method of using the automatic centering quick-change hollow chuck for a double-roller high-power spinning machine as described in claim 7, characterized in that, The adjusting stud (15) and disc spring (16) are used to clamp the inner jaw (13) and outer jaw (14) of the cylindrical blank (7), and to bring the inner jaw (13) into contact with the inner surface of the cylindrical blank (7).

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