Self-centering quick-change hollow chuck for coupling powerful spinning machine and use method of self-centering quick-change hollow chuck

Abstract

The invention provides an automatic centering quick-change hollow chuck for a coupling powerful spinning machine and a using method. Comprising a chuck body (4), a plurality of clamp seats (5), a turntable bearing (3) and a main shaft lifting disc (1), the clamp base (5) is connected with the chuck body (4) through radial sliding grooves in the upper surface of the chuck body (4). The chuck body (4) is arranged on the main shaft lifting disc (1) through the turntable bearing (3); the clamp base (5) comprises an inner jaw (13), an outer jaw (14), an adjusting stud (15) and a belleville spring (16). The invention further relates to a using method of the automatic centering quick-change hollow chuck for the coupling powerful spinning machine. The automatic centering and quick-changing hollow chuck for the coupling powerful spinning machine has the advantages of being large in space, hollow, automatic in centering and quick in blank spinning and workpiece changing, compared with a traditional chuck, the automatic centering and quick-changing hollow chuck is simple in structure and low in manufacturing cost, and the problem that the traditional chuck cannot be applied to the large coupling powerful spinning machine is well solved.

Description

Technical Field

[0001] The invention relates to the technical field of thin-walled metal cylinder spinning equipment, and in particular to an automatic centering quick-change hollow chuck for a wheel-to-wheel high-power spinning machine and a use method thereof. Background Art

[0002] As an important structural and functional component of a rocket, large-sized thin-walled cylindrical parts almost determine the size and carrying capacity of the rocket. The large-scale wheel-to-wheel strong spinning machine without a core mold is the best choice for processing large-sized thin-walled cylindrical parts, and its large chuck is one of the key components of the equipment. The large-sized thin-walled cylindrical blank is clamped on the large chuck and subjected to wheel-to-wheel strong spinning through the equipment's rotating wheel. During spinning, the torque of the spindle is transmitted to the large-sized thin-walled cylindrical blank through the chuck and the fixture, and the paired inner and outer rotating wheels perform strong spinning on the large-sized thin-walled cylindrical blank. If the clamping force of the chuck is not enough, the large-sized thin-walled cylindrical blank will slip during spinning; if the chuck is not designed reasonably, it will be difficult to center the large-sized thin-walled cylindrical blank, which seriously affects the processing accuracy and production efficiency of the workpiece. Different from traditional chucks, the chuck of the large-sized wheel-to-wheel strong spinning machine should have the characteristics of large workpiece size, large clamping force, large hollow size, stable and reliable clamping, and convenient operation. Traditional tooling and fixtures can no longer meet the requirements of the spinning process of large-scale wheel spinning machines. The chuck of large-scale wheel spinning machines needs to solve the problem that traditional chucks are difficult to stably clamp large-sized cylindrical blanks. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic centering quick-change hollow chuck for a wheel high-power spinning machine and a method of use, so as to solve the problems that traditional large chucks have insufficient clamping force, are unable to stably clamp oversized wheel spinning cylinder blanks, cannot clamp oversized hollow blanks, and are difficult to center.

[0004] The present invention is achieved through the following technical solutions:

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

[0006] The clamp seat 5 includes: an inner jaw 13, an outer jaw 14, an adjusting stud 15 and a disc spring 16. When the same batch of blanks of the same size are replaced, the spun blank (i.e., the workpiece) can be directly pulled out of the jaws, and the new blank can be directly pressed into the jaws to achieve quick replacement of the blank. The adjusting stud 15 and the disc spring 16 can ensure that the blank is clamped, while the clamp seat 5 does not move. The inner jaw 13 fixed on the clamp seat 5 can ensure that the blank is centered unchanged, and there is no need to re-center, thereby achieving quick replacement of the barrel blank.

[0007] Preferably, the clamp seat 5 radially slides in the radial groove on the upper surface of the chuck body 4, so as to adapt to the spinning processing of large-sized thin-walled cylindrical parts with different diameters, and can perform centering operation with the help of the epicycle.

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

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

[0010] Preferably, 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. The outer jaw 14 is tightened by the adjusting stud 15, and a disc spring 16 is arranged between the outer jaw 14 and the adjusting stud 15. A long screw passes through the hollow adjusting stud 15 to connect the outer jaw 14 to prevent it from falling out.

[0011] Preferably, an embedded stop cone 12 is provided at the bottom of the opening of the clamp seat 5 ; the tip of the stop cone 12 can penetrate into the bottom of the cylinder blank 7 .

[0012] The present invention also relates to a method for using the aforementioned automatic centering quick-change hollow chuck for a wheel spinning machine, comprising the following steps:

[0013] Step 1: Centering of the blank

[0014] Put the cylindrical blank 7 between the inner jaw 13 and the outer jaw 14 of the clamp 5, rotate the chuck body 4, and feed the outer wheel 6 radially until the outer wheel 6 completely contacts the outer surface of the thin-walled cylindrical blank, and use the outer wheel 6 for centering; then tighten the adjusting stud 15 to compress the disc spring 16, clamp the outer jaw 14 and the inner jaw 13, and then 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, and the chuck body 4 then lifts the fixture seat 5, and the fixture seat 5 pushes the bottom of the cylindrical blank 7 upward through the stop cone 12 embedded in the bottom of its mouth; multiple inner and outer wheels 8 and 6 feed to the cylindrical blank 7 at the same time. When the spindle lifting plate 1 rises, the chuck body 4 and the fixture seat 5 rotate under the drive of the rotating motor 2 and the driving gear 9. The inner and outer wheels 8 and 6 simultaneously apply downward force to the cylindrical blank 7, so that the cone tip of the stop cone 12 penetrates into the bottom of the cylindrical blank 7, effectively preventing the cylindrical blank 7 from slipping, and realizing the transmission of the output torque of the rotating motor 2 to the cylindrical blank 7 to complete the spinning process.

[0017] Preferably, in step 1, the centering operation of the blank is specifically as follows:

[0018] First, loosen the adjustment screw 15 of the outer jaw 14 on each clamp seat 5, so that the inner jaw 13 and the outer jaw 14 are in an open state;

[0019] Put the barrel 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 barrel blank 7 with 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 barrel blank 7;

[0020] The rotating motor 2 is started, and the outer ring 10 of the gear turntable is driven to rotate at a low speed through the driving gear 9. The outer ring 10 of the gear turntable drives the chuck body 4 and the fixture seat 5 to rotate, and the cylinder blank 7 rotates together;

[0021] Multiple external rotating wheels 6 are fed radially toward the center of the equipment. When all the external rotating wheels 6 contact the outer surface of the cylindrical blank 7 at the same time, 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 turn, and then the adjusting studs 15 of the outer jaws 14 are tightened appropriately to complete the automatic centering of the cylindrical blank 7.

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

[0023] The principle of the method of using the present invention is as follows: first, the blank is clamped on the chuck, and then the blank is centered; then, the equipment's rotating wheels are used to perform strong spinning, and during spinning, the torque of the main shaft is transmitted to the large-sized thin-walled cylindrical blank through the chuck and the fixture to overcome the deformation resistance generated when the paired rotating wheels spin the large-sized thin-walled cylindrical blank; since an inner rotating wheel device is arranged in the middle part of a large-sized pair of wheel spinning machine, its chuck is a large hollow structure, so that the inner rotating wheel device can move through the chuck to realize the spinning action.

[0024] The present invention has the following advantages:

[0025] (1) The multiple clamp seats involved in the present invention are placed in radially evenly arranged chuck body slide grooves, and each clamp seat can slide radially in the chuck body slide groove independently, which can adapt to the clamping and spinning of large-sized thin-walled cylindrical parts with different diameters;

[0026] (2) The chuck involved in the present invention is a hollow chuck, and an inner rotating wheel device can be arranged in the middle; the freely slidable clamp seat can quickly center the blank with the help of the outer rotating wheel, and the centering operation of the blank can be completed by tightening the elastic jaws and the clamp seat in turn;

[0027] (3) The bottom of the mouth of the fixture seat 5 described in the present invention is provided with an embedded stop cone 12. The pressure of the spinning wheel on the spindle during spinning is used to press the cone tip into the blank to prevent the blank from slipping, thereby realizing the spindle torque transmission and completing 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 wheel high-power spinning machine involved in the present invention has the characteristics of large hollow space, automatic centering and quick change of spinning blanks and workpieces. Compared with traditional chucks, it has a simple structure and low manufacturing cost, which well solves the problem that traditional chucks cannot be used in large wheel spinning machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The invention discloses a structural schematic diagram of an automatic centering quick-change hollow chuck for an ultra-large wheel spinning machine.

[0030] Figure 2 It is a cross-sectional view of an automatic centering quick-change hollow chuck for an ultra-large wheel spinning machine of the present invention;

[0031] Figure 3 yes Figure 2 A magnified view of the structure at Z in the middle;

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

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

[0034] The present invention is described in detail below in conjunction with specific embodiments. It should be noted that the following embodiments are only further descriptions of the present invention, but the protection scope of the present invention is not limited to the following embodiments.

[0035] Example

[0036] This embodiment relates to an automatic centering quick-change hollow chuck for a wheel spinning machine. Figure 1 and Figure 2 As shown in , it includes: a chuck body 4 and a plurality of fixture seats 5; wherein the fixture seat 5 is connected to the chuck body 4 through a radial slide groove on the upper surface of the chuck body 4;

[0037] The clamp seat 5 includes: an inner jaw 13, an outer jaw 14, an adjusting stud 15 and a disc spring 16. When the same batch of blanks of the same size are replaced, the spun blank (i.e., the workpiece) can be directly pulled out of the jaws, and the new blank can be directly pressed into the jaws to achieve quick replacement of the blank. The adjusting stud 15 and the disc spring 16 can ensure that the blank is clamped, while the clamp seat 5 does not move. The inner jaw 13 fixed on the clamp seat 5 can ensure that the blank is centered unchanged, and there is no need to re-center, thereby achieving quick replacement of the barrel blank.

[0038] The clamp seat 5 radially slides in the radial groove on the upper surface of the chuck body 4 to adapt to the spinning processing of large-sized thin-walled cylindrical parts with different diameters, and can perform centering operation with the help of an epitrochoid.

[0039] The chuck body 4 is mounted on the spindle lifting plate 1 through the turntable bearing 3, and a plurality of fixture seats 5 are evenly arranged in the radial slide grooves on the upper surface of the chuck body 4. The cylinder blank 7 is clamped in the fixture seat 5, and a plurality of outer and inner wheels 6 and 8 are evenly arranged inside and outside the cylinder blank 7 along the circumference.

[0040] like Figure 2 and Figure 3 As shown, the turntable bearing 3 includes a turntable outer ring 10 and a turntable inner ring 11 with gears. The turntable inner ring 11 is fixed on the upper surface of the spindle lifting plate 1. The chuck body 4 is fixed on the outer ring 10 of the turntable with gears. The rotating motor 2 is fixed on the lower part of the spindle lifting plate 1, and its output shaft passes through the spindle lifting plate 1. The shaft end is connected to the driving gear 9, and the driving gear 9 is meshed with the gear of the turntable outer ring 10 with gears.

[0041] 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 slot. The outer jaw 14 can be tightened by the adjusting stud 15. A disc spring 16 is arranged between the outer jaw 14 and the adjusting stud 15. The long screw passes through the hollow adjusting stud 15 to connect the outer jaw 14 to prevent it from falling out. An embedded stop cone 12 is arranged at the bottom of the clamp seat 5, and the tip of the stop cone 12 can be inserted into the bottom of the barrel blank 7.

[0042] This embodiment also relates to a method for using the aforementioned automatic centering quick-change hollow chuck for the wheel spinning machine, comprising:

[0043] (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, so that the entire jaws are in an open state, and the clamp seat 5 is in a free state in the slide groove. At this time, put 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 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 follow the cylindrical blank 7 and move freely along the radial slide groove on the upper surface of the chuck body 4 without disengaging the cylindrical blank 7, ensuring that the inner jaws 13 always contact the inner surface of the cylinder to achieve accurate positioning; start the rotating motor 2, drive the outer ring 10 of the gear turntable to rotate at a low speed through the driving gear 9, and the outer ring 10 of the gear turntable drives the chuck body 4 and the clamp seat 5 to rotate, and the cylindrical blank 7 rotates together. Multiple epitrochoids 6 are fed radially at the same time. When all epitrochoids 6 contact the outer surface of the cylindrical blank 7 at the same time, since all epitrochoids 6 are on the same circumference with the center of the device as the center, the outer circle center of the cylindrical blank 7 is concentric with the center of the device. Then tighten the clamping screws of the clamp seat 5 in turn, and then tighten the adjusting studs 15 of the outer jaws 14 appropriately, so that the automatic centering of the cylindrical blank 7 is achieved;

[0044] (2) During the spinning process, the spindle lifting plate 1 lifts the chuck body 4 upwards through the turntable bearing 3, and the chuck body 4 then lifts the fixture seat 5, and the fixture seat 5 pushes the bottom of the cylindrical blank 7 upwards through the stop cone 12 embedded in the bottom of its mouth. Multiple inner and outer wheels 8 and 6 feed the cylindrical blank 7 at the same time. When the spindle lifting plate 1 rises, the chuck body 4 and the fixture seat 5 rotate under the drive of the rotating motor 2 and the driving gear 9. The inner and outer wheels 8 and 6 simultaneously apply downward force to the cylindrical blank 7, so that the tip of the stop cone 12 penetrates into 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 rotating motor 2 to the cylindrical blank 7, and completing the spinning process.

[0045] Furthermore, the function of the adjusting stud 15 and the disc spring 16 involved is to make the inner jaw 13 and the outer jaw 14 elastically clamp the cylindrical blank 7, ensuring that the inner jaw 13 reliably contacts the inner surface of the cylindrical body, so that after the spinning process is completed, the cylindrical blank 7 (i.e., the workpiece) that has been spun can be directly removed from between the inner jaw 13 and the outer jaw 14, and then a new cylindrical blank 7 of the same size can be pressed in from between the inner jaw 13 and the outer jaw 14 with the beveled grooves. This process does not require loosening the adjusting stud 15 of the outer jaw 14, so that the cylindrical blank 7 can be quickly replaced, and the centering position of the new cylindrical blank 7 can be ensured to remain unchanged.

[0046] The present invention is particularly suitable for the clamping, positioning and spinning of large cylindrical parts with a diameter of more than 2 meters, and can effectively improve the working efficiency of the spinning process.

[0047] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which will not affect the essence of the present invention.

Claims

1. An automatic centering quick-change hollow chuck for a wheel spinning machine, characterized in that: include: A chuck body (4) and a plurality of clamp seats (5); wherein the clamp seats (5) are connected to the chuck body (4) via radial grooves on the upper surface of the chuck body (4); The clamp seat (5) comprises an inner jaw (13), an outer jaw (14), an adjusting stud (15) and a disc spring (16).

2. The automatic centering quick-change hollow chuck for the wheel spinning machine according to claim 1, characterized in that: The clamp seat (5) slides radially in the radial sliding groove on the upper surface of the chuck body (4).

3. The automatic centering quick-change hollow chuck for the wheel spinning machine according to claim 1, characterized in that: The chuck body (4) is mounted on the spindle lifting plate (1) via a turntable bearing (3).

4. The automatic centering quick-change hollow chuck for the wheel spinning machine as claimed in claim 3, characterized in that: The turntable bearing (3) comprises a turntable outer ring (10) with a gear and a turntable inner ring (11); wherein the turntable inner ring (11) is fixed on the upper surface of the spindle lifting plate (1), the chuck body (4) is fixed on the upper surface of the turntable outer ring (10) with a gear, and the rotary motor (2) is fixed on the lower part of the spindle lifting plate (1), and its output shaft passes through the spindle lifting plate (1), and the end of the output shaft is connected to the driving gear (9), and the driving gear (9) is meshed with the gear of the turntable outer ring (10) with a gear.

5. The automatic centering quick-change hollow chuck for the wheel spinning machine as claimed in claim 3, characterized in that: An inner jaw (13) is fixed on the inner side of the chuck body (4), and an outer jaw (14) movable radially is installed in a clamping groove on the outer side.

6. The automatic centering quick-change hollow chuck for the wheel spinning machine according to claim 1, characterized in that: An embedded stop cone (12) is provided at the bottom of the opening of the clamp seat (5).

7. A method for using the automatic centering quick-change hollow chuck for a wheel spinning machine as claimed in claim 1, characterized in that: The following steps are involved: Step 1: Centering of the blank The cylindrical blank (7) is placed between the inner jaw (13) and the outer jaw (14) of the clamp (5), the chuck body (4) is rotated, and the outer wheel (6) is radially fed until the outer wheel (6) completely contacts the outer surface of the thin-walled cylindrical blank, and the outer wheel (6) is used for centering; then the adjusting stud (15) is tightened to compress the disc spring (16) to clamp the inner jaw (13) and the outer jaw (14), and then the clamp seat (5) is tightened to complete the centering operation of the blank; Step 2: Spinning The spindle lifting plate (1) lifts the chuck body (4) upwards through the turntable bearing (3), and the chuck body (4) then lifts the fixture seat (5), and the fixture seat (5) pushes the bottom of the cylindrical blank (7) upwards through the stop cone (12) embedded in the bottom of its mouth; multiple inner and outer wheels (8) feed the cylindrical blank (7) at the same time. When the spindle lifting plate (1) rises, the chuck body (4) and the fixture seat (5) rotate under the drive of the rotating motor (2) and the driving gear (9), and the inner and outer wheels (8) and (6) simultaneously apply downward force to the cylindrical blank (7), so that the cone tip of the stop cone (12) penetrates into the bottom of the cylindrical blank (7), and the output torque of the rotating motor (2) is transmitted to the cylindrical blank (7), completing the spinning process.

8. The method for using the automatic centering quick-change hollow chuck for the wheel spinning machine according to claim 7, characterized in that: Step 1: The centering operation of the blank is specifically as follows: First, loosen the adjustment screw (15) of the outer jaw (14) on each clamp seat (5) to open it; The cylindrical blank (7) is placed between the inner jaw (13) and the outer jaw (14) of the clamp seat (5), and the adjusting stud (15) is tightened, and the inner jaw (13) and the outer jaw (14) are clamped with the cylindrical blank (7) by the disc spring (16); 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); The rotating motor (2) is started to drive the outer ring of the geared turntable (10) to rotate at a low speed through the driving gear (9), and the outer ring of the geared turntable (10) drives the chuck body (4) and the fixture seat (5) to rotate, and the cylindrical blank (7) rotates together; Multiple external rotating wheels (6) are fed along the radial center. When all the external rotating wheels (6) contact the outer surface of the cylindrical blank (7) at the same time, the outer circle center of the cylindrical blank (7) and the center of the equipment are concentric; the clamping screws of the clamp seat (5) are tightened in turn, and then the adjusting studs (15) of the outer jaws (14) are tightened appropriately to complete the automatic centering of the cylindrical blank (7).

9. The method for using the automatic centering quick-change hollow chuck for the wheel spinning machine according to claim 7, characterized in that: The adjusting stud (15) and the disc spring (16) are used to enable the inner jaw (13) and the outer jaw (14) to clamp the barrel blank (7), and to make the inner jaw (13) contact the inner surface of the barrel blank (7).

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