Rotatable clamping device

Abstract

The utility model belongs to the technical field of machine tools, and particularly relates to a rotatable clamping device which comprises a base, a chuck mounting seat, a chuck, a tip assembly and a jacking device. A center assembly is slidably arranged on the base. A chuck mounting seat is arranged at the position, opposite to the center assembly, of the base, and a chuck is rotatably arranged on the chuck mounting seat; the jacking device comprises a transmission base body and a tip, the transmission base body is in a disc shape, and the tip is perpendicular to the transmission base body and arranged in the center of the transmission base body. The transmission base body is clamped in the center of a clamping jaw of the chuck and rotates along with the chuck. The transmission base body is provided with a driving groove, and the driving groove extends in the radial direction of the transmission base body and is through in the axial direction of the transmission base body. According to the rotatable clamping device, when the peripheral side surface of a shaft workpiece is machined, only one-time clamping is needed, the coaxiality of the two ends of the large shaft workpiece can be guaranteed, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tools, and particularly relates to a rotatable clamping device. Background Technique

[0002] A lathe is a machine tool mainly used for turning a rotating workpiece with a turning tool. When machining a workpiece on a lathe, the workpiece must be positioned and clamped in a lathe fixture. Whether the workpiece is correctly and reliably clamped will directly affect the machining quality and production efficiency.

[0003] When clamping on a lathe, the one-clamp-one-center method is usually adopted, that is, one end of the workpiece is clamped by a three-jaw chuck, and the other end is supported by a rear center for clamping. Clamping with this method is relatively safe and reliable, with the characteristics of strong rigidity and large axial force, so it is widely used. When it is necessary to machine the entire circumferential surface of a shaft workpiece, this one-clamp-one-center clamping method cannot meet the entire machining requirements in one clamping and needs to be clamped twice. However, clamping twice will result in low production efficiency and it is difficult to ensure the coaxiality of both ends of a large shaft workpiece, affecting the quality of the workpiece. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a rotatable clamping device. The fastener can be fixed to the end face of a large shaft workpiece through the driving groove of the jacking device, without interfering with or occupying the circumferential surface of the shaft workpiece. Only one clamping is required, which can ensure the coaxiality of both ends of the large shaft workpiece and improve the production efficiency.

[0005] To achieve the above purpose, the utility model provides a rotatable clamping device, which includes a base, a chuck mounting seat, a chuck, a center assembly and a jacking device; the center assembly is slidably arranged on the base; a chuck mounting seat is arranged on the base at a position opposite to the center assembly, and a chuck is rotatably arranged on the chuck mounting seat; the jacking device includes a transmission base body and a center. The transmission base body is in a disc shape, and the center is vertically arranged on the center of the transmission base body; the transmission base body is clamped in the center of the jaws of the chuck and rotates with the chuck; the transmission base body is provided with a driving groove, and the driving groove extends radially along the transmission base body and penetrates axially on the transmission base body.

[0006] The existing process requires two clampings to complete the processing of large shaft workpieces. The rotatable clamping device of the present application can fix the fasteners to the end face of the large shaft workpiece through the driving groove of the clamping device, which will not interfere with or occupy the peripheral surface of the large shaft workpiece. Therefore, when the peripheral surface of the large shaft workpiece needs to be processed, only one clamping is required, which improves production efficiency. The large shaft workpiece is fixed between the clamping device and the top assembly. The chuck mounting seat connected to the chuck drives the chuck to rotate, and the clamping device drives the large shaft workpiece to rotate accordingly. The axis of the chuck, the clamping device and the top assembly are in a straight line, which can ensure the coaxiality of the two ends of the large shaft workpiece. The clamping device includes a transmission base and a top. The top is arranged in the center of the transmission base vertically. The top and the top assembly support the large shaft workpiece. At the same time, a driving groove is provided on the transmission base. The fastener passes through the driving groove and is fixed to the large shaft workpiece to process the large shaft workpiece.

[0007] Furthermore, the top includes a positioning cone and a supporting column; the positioning cone is conical, and the supporting column is cylindrical; one end of the supporting column is connected to the center of the transmission base, and the other end is integrally connected to the positioning cone.

[0008] The top includes a positioning cone and a supporting column. One end of the supporting column is connected to the center of the transmission base, and the other end is integrally connected to the positioning cone with consistent connecting surfaces. The top supports large shaft workpieces to fix them and facilitate processing. At the same time, the supporting column can increase the distance between the tightening device and the large shaft workpiece, which is beneficial to heat dissipation.

[0009] Furthermore, the tightening device also includes a leveling layer; the leveling layer is disc-shaped; one end of the leveling layer is integrally connected to the transmission base and has a radial dimension smaller than the transmission base, and the other end is close to the chuck; the driving groove of the transmission base axially passes through the leveling layer.

[0010] The clamping device also includes a leveling layer, which can cooperate with the end face of the chuck to make the transmission base more evenly fixed on the chuck, ensuring that the rotation center of the clamping device is in line with the axis of the main shaft, ensuring the coaxiality of both ends when processing large shaft workpieces, and improving product quality. At the same time, the driving groove of the transmission base axially penetrates the leveling layer, and the fastener passes through the leveling layer and the driving groove of the transmission base to fix the large shaft workpiece.

[0011] Furthermore, the driving groove includes a first driving groove and a second driving groove; one end of the first driving groove and one end of the second driving groove are close to the top and have a distance from the top; the first driving groove and the second driving groove are symmetrically arranged on both sides of the top.

[0012] The driving slots include a first driving slot and a second driving slot. The fastener passes through the first driving slot and the second driving slot to fix to the large shaft workpiece. At the same time, the first driving slot and the second driving slot are symmetrically arranged on both sides of the center point, so that the fastener is fixed on both sides of the large shaft workpiece, ensuring the stability of the large shaft workpiece during the machining process.

[0013] Furthermore, positioning holes are provided on the transmission base and the leveling layer; the positioning holes penetrate axially through the transmission base and the leveling layer; the fastener passes through the positioning holes and is connected to the end face of the shaft workpiece.

[0014] The transmission base and the leveling layer are provided with positioning holes, and the fastener passes through the positioning holes to fix the large shaft workpiece, so as to machine the large shaft workpiece.

[0015] Furthermore, there are six positioning holes, and the six positioning holes are annularly distributed, and two of the positioning holes are symmetrically arranged on both sides of the second driving slot.

[0016] Six positioning holes are provided on the transmission base and the leveling layer, and the fastener passes through the six positioning holes to fix to the large shaft workpiece. The six positioning holes can make the large shaft workpiece fixed more firmly, ensuring the production quality.

[0017] Furthermore, a slide rail is provided on the base; the center point assembly includes a sliding seat; a sliding groove is provided on the sliding seat, and the sliding groove cooperates with the slide rail, and the center point assembly is slidably arranged on the slide rail; a locking device is also provided on the base.

[0018] The center point assembly slides on the slide rail, and it can slide to adapt to large shaft workpieces of different sizes, improving the applicability of the rotatable clamping device. A locking device is also provided on the base for fixing the position of the center point assembly.

[0019] Furthermore, a fixing plate is provided on the sliding seat; a locking hole is provided on the fixing plate; the locking device includes a locking plate and a locking bolt, and the locking bolt passes through the locking hole and is fixedly connected to the locking plate.

[0020] After determining the position of the center point assembly, the locking bolt passes through the locking hole and is fixedly connected to the locking plate, fixing the position of the center point assembly to machine the large shaft workpiece.

[0021] Furthermore, a jacket is provided on the sliding seat; a connecting shaft is provided in the jacket, one end of the connecting shaft is connected to the receiving rod, and the other end is connected to the sleeve; a sleeve bearing and a tailstock center are provided in the sleeve, and the sleeve bearing is arranged between the sleeve and the tailstock center.

[0022] The connecting shaft in the jacket connects the receiving rod and the sleeve. A sleeve bearing is provided inside the sleeve, and the sleeve bearing can drive the tailstock center to rotate. The tailstock center and the large shaft workpiece to be machined rotate, which can reduce the friction between the two and improve the service life of the tailstock center.

[0023] Furthermore, a bearing and a main shaft are provided in the chuck mounting seat; the bearing is installed inside the chuck mounting seat, and the main shaft is arranged through the bearing; one end of the main shaft is connected to the chuck, and the other end is the driving end; the driving end is connected with a motor.

[0024] The driving end is connected to the motor and the main shaft. When the motor works, it can drive the driving end and the main shaft to rotate, and the chuck also drives the tightening device to start rotating accordingly, realizing the rotation of the entire large shaft workpiece during processing and providing power for the entire processing process.

[0025] Beneficial effects

[0026] In the original process, when machining large shaft workpieces, the workpiece needs to be machined through two clampings, resulting in low production efficiency. Moreover, the two clampings will affect the coaxiality of both ends of the large shaft workpiece. In the rotatable clamping device of the present utility model, the fastener can be fixed to the end face of the large shaft workpiece through the driving groove of the tightening device, without interfering with or occupying the circumferential surface of the large shaft workpiece. Therefore, when machining the circumferential surface of the large shaft workpiece, only one clamping is required, improving the production efficiency and ensuring the coaxiality of both ends of the large shaft workpiece. At the same time, the rotatable clamping device of the present application uses the tip assembly to slide on the slide rail to be applicable to the machining of large shaft workpieces of different sizes, having wide applicability. Description of the drawings

[0027] Figure 1 is the front view of a conventional lathe;

[0028] Figure 2 is the side view of the locking device in Embodiment 1;

[0029] Figure 3 is Figure 2 the sectional view taken along the direction A shown;

[0030] Figure 4 is the isometric view of a conventional lathe;

[0031] Figure 5 is the right view of a conventional lathe;

[0032] Figure 6 is the sectional view of the tip assembly;

[0033] Figure 7 is the sectional view of the chuck mounting seat and the chuck;

[0034] Figure 8 is the side view of the locking device in Embodiment 2.

[0035] In the attached drawings: 1. Base; 2. Chuck mounting seat; 3. Chuck; 4. Center assembly; 5. Tightening device; 11. Slide rail; 12. Locking plate; 13. Locking bolt; 21. Bearing; 22. Main shaft; 41. Slide seat; 42. Outer sleeve; 43. Sleeve; 51. Transmission base; 52. Center; 53. Leveling layer; 221. Driving end; 411. Fixed plate; 421. Connecting shaft; 422. Bearing rod; 431. Sleeve bearing; 432. Tailstock center; 511. Driving groove; 512. Positioning hole; 521. Positioning cone; 522. Supporting column; 4111. Locking hole; 5111. First driving groove; 5112. Second driving groove. Detailed implementation mode

[0036] Embodiment 1

[0037] As Figure 1 And Figure 2 Shown is a rotatable clamping device, which is characterized in that it includes a base 1, a chuck mounting seat 2, a chuck 3, a center assembly 4 and a tightening device 5; a center assembly 4 is slidably provided on the base 1; a chuck mounting seat 2 is provided at a position on the base 1 opposite to the center assembly 4, and a chuck 3 is rotatably provided on the chuck mounting seat 2; the tightening device 5 includes a transmission base 51 and a center 52, the transmission base 51 is disc-shaped, and the center 52 is vertically arranged on the center of the transmission base 51 with respect to the transmission base 51; the transmission base 51 is clamped in the center of the jaws of the chuck 3 and rotates with the chuck 3; the transmission base 51 is provided with a driving groove 511, and the driving groove 511 extends radially along the transmission base 51 and penetrates axially on the transmission base 51.

[0038] In the original process, when machining large shaft workpieces, the workpiece needs to be clamped twice to complete the machining. For the rotatable clamping device of the present application, the fastener can be fixed to the end face of the large shaft workpiece through the driving groove 511 of the tightening device 5, without interfering with or occupying the circumferential surface of the large shaft workpiece. Therefore, when machining the circumferential surface of the large shaft workpiece, only one clamping is required, improving the production efficiency. The large shaft workpiece is fixed between the tightening device 5 and the center assembly 4, the chuck mounting seat 2 connected to the chuck 3 drives the chuck 3 to rotate, and the tightening device 5 drives the large shaft workpiece to rotate accordingly. The axes of the chuck 3, the tightening device 5 and the center assembly 4 are on the same straight line, which can ensure the coaxiality of both ends of the large shaft workpiece. The tightening device 5 includes a transmission base 51 and a center 52. The center 52 is vertically arranged on the center of the transmission base 51 with respect to the transmission base 51. The center 52 and the center assembly 4 hold the large shaft workpiece. At the same time, the transmission base 51 is provided with a driving groove 511, and the fastener passes through the driving groove 511 to fix to the large shaft workpiece for machining the large shaft workpiece.

[0039] As Figure 3As shown, the center point 52 includes a positioning cone 521 and a support column 522; the positioning cone 521 is conical, and the support column 522 is cylindrical; one end of the support column 522 is connected to the center of the transmission base 51, and the other end is integrally connected to the positioning cone 521.

[0040] The center point 52 includes a positioning cone 521 and a support column 522. One end of the support column 522 is connected to the center of the transmission base 51, and the other end is integrally connected to the positioning cone 521 with a consistent connection surface. The center point 52 holds the large shaft workpiece in place to facilitate machining. At the same time, the support column 522 can increase the distance between the clamping device and the large shaft workpiece, which is beneficial for heat dissipation.

[0041] The clamping device 5 further includes a leveling layer 53; the leveling layer 53 is disc-shaped; one end of the leveling layer 53 is integrally connected to the transmission base 51 and has a smaller radial dimension than the transmission base 51, and the other end is close to the chuck 3; the drive groove 511 of the transmission base 51 axially penetrates the leveling layer 53.

[0042] The clamping device 5 further includes a leveling layer 53. The leveling layer 53 can cooperate with the end face of the chuck 3 to make the transmission base 51 more flatly fixed on the chuck 3, ensuring that the rotation center of the clamping device 5 is on the same line as the axis of the main shaft, ensuring the coaxiality of both ends during the machining of large shaft workpieces, and improving product quality. At the same time, the drive groove 511 of the transmission base 51 axially penetrates the leveling layer 53, and the fastener passes through the leveling layer 53 and the drive groove 511 of the transmission base 51 to fix the large shaft workpiece.

[0043] As Figure 2 shown, the drive groove 511 includes a first drive groove 5111 and a second drive groove 5112; one end of the first drive groove 5111 and one end of the second drive groove 5112 are close to the center point 52 and have a distance from the center point 52; the first drive groove 5111 and the second drive groove 5112 are symmetrically arranged on both sides of the center point 52.

[0044] The drive groove 511 includes a first drive groove 5111 and a second drive groove 5112. The fastener passes through the first drive groove 5111 and the second drive groove 5112 to fix the large shaft workpiece. At the same time, the first drive groove 5111 and the second drive groove 5112 are symmetrically arranged on both sides of the center point 52, so that the fastener is fixed on both sides of the large shaft workpiece, ensuring the stability of the large shaft workpiece during the machining process.

[0045] As Figure 4 and Figure 5 shown, the base 1 is provided with a slide rail 11; the cross-section of the slide rail 11 is wedge-shaped; the center point assembly 4 includes a sliding seat 41; the sliding seat 41 is provided with a chute, and the chute cooperates with the slide rail 11, and the center point assembly 4 is slidably arranged on the slide rail 11; the base 1 is also provided with a locking device.

[0046] The top component 4 slides on the slide rail 11 and can be slid to adapt to large shaft workpieces of different sizes, improving the applicability of the rotatable clamping device. A locking device is also provided on the base 1 for fixing the position of the top component 4.

[0047] A fixing plate 411 is provided on the sliding seat 41; a locking hole 4111 is provided on the fixing plate 411; the locking hole 4111 is circular; the locking device includes a locking plate 12 and a locking bolt 13, and the locking plate 12 is rectangular; the locking bolt 13 passes through the locking hole 4111 and is fixedly connected to the locking plate 12.

[0048] After determining the position of the top component 4, the locking bolt 13 passes through the locking hole 4111 and is fixedly connected to the locking plate 12, fixing the position of the top component 4 for machining the large shaft workpiece.

[0049] As Figure 6 shown, an outer sleeve 42 is provided on the sliding seat 41; a connecting shaft 421 is provided in the outer sleeve 42, one end of the connecting shaft 421 is connected to the receiving rod 422, and the other end is connected to the sleeve 43; a sleeve bearing 431 and a tailstock center 432 are provided in the sleeve 43, and the sleeve bearing 431 is provided between the sleeve 43 and the tailstock center 432.

[0050] The connecting shaft 421 in the outer sleeve 42 connects the receiving rod 422 and the sleeve 43. A sleeve bearing 431 is provided inside the sleeve 43. The sleeve bearing 431 can drive the tailstock center 432 to rotate. The tailstock center 432 and the large shaft workpiece rotate, which can reduce the friction between them and improve the service life of the tailstock center 432.

[0051] As Figure 7 shown, a bearing 21 and a main shaft 22 are provided in the chuck mounting seat 2; the chuck mounting seat housing is rectangular; the bearing 21 is installed inside the chuck mounting seat 2, and the main shaft 22 passes through the bearing 21; one end of the main shaft 22 is connected to the chuck 3, and the chuck 3 is a three-jaw chuck; the other end is the driving end 221; the driving end 221 is connected to a motor.

[0052] The driving end 221 is connected to the motor and the main shaft 22. When the motor works, it can drive the driving end 221 and the main shaft 22 to rotate, and the chuck 3 also drives the tightening device 5 to start rotating, realizing the rotation of the entire large shaft workpiece during machining and providing power for the entire machining process.

[0053] Embodiment 2

[0054] As Figure 8As shown, on the basis of Embodiment 1, positioning holes 512 are provided on the transmission base 51 and the leveling layer 53; the positioning holes 512 are circular; the positioning holes 512 penetrate axially through the transmission base 51 and the leveling layer 53; the fasteners pass through the positioning holes 512 and are connected to the end face of the shaft workpiece.

[0055] The transmission base 51 and the leveling layer 53 are provided with positioning holes 512, and the fasteners pass through the positioning holes 512 to fix the large shaft workpiece, so as to process the large shaft workpiece.

[0056] There are six positioning holes 512, and the six positioning holes 512 are distributed in a ring shape, and the six positioning holes 512 are arranged in pairs; two of the positioning holes 512 are symmetrically arranged on both sides of the second drive groove 5112.

[0057] Six positioning holes 512 are provided on the transmission base 51 and the leveling layer 53, and the fasteners pass through the six positioning holes 512 to fix with the large shaft workpiece. The six positioning holes 512 can make the large shaft workpiece fixed more firmly and ensure the production quality.

Claims

1. A rotatable clamping device, characterized in that: The invention comprises a base (1), a chuck mounting seat (2), a chuck (3), a center assembly (4) and a tightening device (5); the base (1) is slidably provided with a center assembly (4); a chuck mounting seat (2) is provided on the base (1) and at a position opposite to the center assembly (4); a chuck (3) is rotatably provided on the chuck mounting seat (2); the tightening device (5) comprises a transmission base (51) and a center assembly (52); the transmission base (51) is disc-shaped, and the center assembly (52) is arranged perpendicular to the transmission base (51) at the center of the transmission base (51); the transmission base (51) is clamped at the center of a claw of the chuck (3) and rotates with the chuck (3); the transmission base (51) is provided with a driving groove (511), and the driving groove (511) extends along the transmission base (51) in a radial direction and penetrates the transmission base (51) in an axial direction.

2. The rotatable clamping device according to claim 1, characterized in that: The tip (52) comprises a positioning cone (521) and a supporting column (522); the positioning cone (521) is conical, and the supporting column (522) is cylindrical; one end of the supporting column (522) is connected to the center of the transmission base (51), and the other end is integrally connected to the positioning cone (521).

3. The rotatable clamping device according to claim 1, characterized in that: The tightening device (5) further comprises a leveling layer (53); the leveling layer (53) is disc-shaped; one end of the leveling layer (53) is integrally connected to the transmission base (51) and has a radial dimension smaller than that of the transmission base (51), and the other end is close to the chuck (3); the driving groove (511) of the transmission base (51) axially penetrates the leveling layer (53).

4. The rotatable clamping device according to claim 1, characterized in that: The driving groove (511) comprises a first driving groove (5111) and a second driving groove (5112); one end of the first driving groove (5111) and one end of the second driving groove (5112) are close to the top end (52) and are at a distance from the top end (52); the first driving groove (5111) and the second driving groove (5112) are symmetrically arranged on both sides of the top end (52).

5. The rotatable clamping device according to claim 3, characterized in that: Positioning holes (512) are provided on the transmission base (51) and the leveling layer (53); the positioning holes (512) penetrate the transmission base (51) and the leveling layer (53) in the axial direction; and the fastener passes through the positioning holes (512) and is connected to the end surface of the shaft workpiece.

6. The rotatable clamping device according to claim 5, characterized in that: There are six positioning holes (512), which are distributed in a ring shape, and two positioning holes (512) are symmetrically arranged on both sides of the second driving groove (5112).

7. The rotatable clamping device according to claim 1, characterized in that: The base (1) is provided with a slide rail (11); the top assembly (4) comprises a sliding seat (41); the sliding seat (41) is provided with a slide groove, the slide groove cooperates with the slide rail (11), and the top assembly (4) is slidably arranged on the slide rail (11); the base (1) is also provided with a locking device.

8. The rotatable clamping device according to claim 7, characterized in that: The sliding seat (41) is provided with a fixing plate (411); the fixing plate (411) is provided with a locking hole (4111); the locking device comprises a locking plate (12) and a locking bolt (13); the locking bolt (13) passes through the locking hole (4111) and is fixedly connected to the locking plate (12).

9. The rotatable clamping device according to claim 8, characterized in that: The sliding seat (41) is provided with an outer sleeve (42); the outer sleeve (42) is provided with a connecting shaft (421), one end of the connecting shaft (421) is connected to a receiving rod (422), and the other end is connected to a sleeve (43); the sleeve (43) is provided with a sleeve bearing (431) and a tailstock center (432), and the sleeve bearing (431) is arranged between the sleeve (43) and the tailstock center (432).

10. The rotatable clamping device according to claim 1, characterized in that: A bearing (21) and a spindle (22) are provided in the chuck mounting seat (2); the bearing (21) is mounted inside the chuck mounting seat (2), and the spindle (22) passes through the bearing (21); one end of the spindle (22) is connected to the chuck (3), and the other end is a driving end (221); the driving end (221) is connected to a motor.

Images