Elastic clamping device for turning end face

Abstract

The present invention relates to an elastic clamping device for turning the end face of a workpiece, which comprises a clamping seat, a driving center, a driving center fixing bolt, an adjusting pad, an elastic element, and a tailstock center. A driving center is provided on one side of the clamping seat. One side of the driving center is fixedly connected to the clamping seat through the driving center fixing bolt. A stepped structure is provided on the outer circumference of the other side of the driving center. An elastic element is sleeved around the stepped structure. A workpiece is arranged at the end face of the elastic element in the same direction as the center of the driving center. The center of one end side of the workpiece contacts the driving center, and a tailstock center is provided at the center position of the other end side of the workpiece. The tailstock center is fixedly connected to the tailstock of the machine tool. This elastic clamping device has the characteristics of convenient disassembly and simple maintenance. For the machining of the center holes at both ends of the workpiece, it can meet the requirement of the coaxiality between the machining surface and the center hole, and the use of elastic materials in the device can avoid damaging the workpiece during the turning process.

Description

Technical Field

[0001] The present invention relates to a clamping device for a lathe, specifically to an elastic clamping device for turning the end face, which is applied to the processing of products with high coaxiality requirements between the processing surface and the center hole. Background Art

[0002] During the turning process of a workpiece, for workpieces with all outer surfaces to be processed and relatively soft processing materials, a process chuck is generally left for processing, and then the process chuck is processed off by clamping the workpiece surface. Such a processing method will cause waste of raw materials, and the workpiece surface will also be bruised or scratched by the jaws. If center holes need to be processed at both ends and there are coaxiality requirements between the processing surface and the center hole, it is also very difficult for the workpiece to meet the coaxiality requirements after processing. Summary of the Invention

[0003] In view of the above-mentioned existing technical problems, the purpose of the present invention is to provide an elastic clamping device for turning the end face, which has the characteristics of convenient disassembly and assembly and simple maintenance.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: an elastic clamping device for turning the end face, including a chuck base, a driving center, a driving center fixing bolt, an adjusting pad, an elastic element, and a tailstock center; a driving center is provided on one side of the chuck base, one side of the driving center is fixedly connected to the chuck base through the driving center fixing bolt, a stepped structure is provided on the outer circumference of the other side of the driving center, an elastic element is sleeved around the stepped structure, a workpiece is arranged at the end face of the elastic element in the same direction as the center of the driving center, the center of one end side of the workpiece contacts the driving center, a tailstock center is provided at the center position of the other end side of the workpiece, and the tailstock center is fixedly connected to the tailstock of the machine tool;

[0005] An adjusting pad is provided between the elastic element and the side wall of the driving center step, and the length of the elastic element can be adjusted through the adjusting pad to control the magnitude of the end face pressure;

[0006] The elastic element is connected with the adjusting pad in an interference fit manner;

[0007] The elastic element adopts a polyurethane rod, and the size of the polyurethane rod is determined by calculating the end face pressure required by the product;

[0008] The driving center and the side surface of the chuck base are respectively fixedly connected through driving center adjusting bolts. By adjusting the driving center adjusting bolts, the driving center is adjusted to the optimal position and fixed tightly by the driving center fixing bolt;

[0009] Further, in order to facilitate the pre-adjustment of the machine tool tailstock to reach the required position, a workpiece auxiliary support is fixedly provided at the bottom of the machine tool tailstock. One end of the workpiece auxiliary support is fixedly welded to the machine tool tailstock at the top, and a movable block is movably provided at the top of the other end. During use, the workpiece is adjusted to the corresponding position by contacting the surface of the movable block with the workpiece.

[0010] The workpiece auxiliary support is of a U-shaped structure. A through hole is provided inside one side of the workpiece auxiliary support where the movable block is provided. A piston rod fixedly connected to the bottom of the movable block is provided in the through hole, and the bottom of the piston rod is connected to a first hydraulic cylinder. When the height of the workpiece needs to be adjusted radially, the piston rod is pushed by the action of the first hydraulic cylinder, and the movable block pushes the workpiece to the required position under the push of the piston rod.

[0011] Further, in order to facilitate the axial displacement between the machine tool tailstock and the active center to clamp the workpiece, a push plate is fixedly provided at the end of the machine tool tailstock. One side of the push plate is fixed to the machine tool tailstock, and a piston rod is fixedly provided at the center position of the other side of the push plate. A second hydraulic cylinder is provided on the piston rod. When the workpiece needs to be clamped, the second hydraulic cylinder is started to force the push plate to move the tailstock center towards the active center under the push of the piston rod, thereby realizing the axial clamping of the workpiece.

[0012] The working principle of the clamping device of the present utility model is: starting the machine tool tailstock to make the tailstock center move forward to clamp the workpiece together with the active center, and at the same time, the elastic element will be squeezed and deformed; the pressure generated by the deformation of the elastic element acts on the end face of the workpiece, and the reaction force generated will also act on the adjusting pad; when the main shaft rotates under pressure, sufficient friction will be generated between the workpiece, the elastic element and the active center, so that the elastic element will drive the workpiece to rotate.

[0013] The beneficial effects of the present invention are: the elastic clamping device has the characteristics of convenient disassembly and simple maintenance; for the machining of the center holes at both ends of the workpiece, the coaxiality requirement between the machining surface and the center hole can be met, and the coaxiality requirement of the workpiece is easily achieved after machining; and the elastic material adopted in the device can avoid the workpiece from being bruised during the turning process. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present invention.

[0015] In the figure, 1. Clamping seat, 2. Active center adjusting bolt, 3. Active center fixing bolt, 4. Active center, 5. Adjusting pad, 6. Elastic element, 7. Workpiece auxiliary support, 8. Tailstock center, 9. Machine tool tailstock, 10. Movable block, 11. Through hole, 12. Piston rod, 13. First hydraulic cylinder, 14. Push plate, 15. Second hydraulic cylinder. Detailed Embodiments

[0016] The present invention will be described in detail below with reference to the accompanying drawings.

[0017] The turning end face elastic clamping device includes a clamping seat 1, a driving center 4, a driving center fixing bolt 3, an adjusting pad 5, an elastic element 6, and a tailstock center 8. On one side of the clamping seat 1, there is a driving center 4. One side of the driving center 4 is fixedly connected to the clamping seat 1 through the driving center fixing bolt 3. On the outer circumference of the other side of the driving center 4, there is a stepped structure. An elastic element 6 is sleeved around the stepped structure. A workpiece is arranged at the end face of the elastic element 6 in the same direction as the center of the driving center 4. The center of one end side of the workpiece contacts the driving center 4, and at the center position of the other end side of the workpiece, there is a tailstock center 8. The tailstock center 8 is fixedly connected to the machine tool tailstock 9.

[0018] An adjusting pad 5 is arranged between the elastic element 6 and the stepped side wall of the driving center 4. The length of the elastic element 6 can be adjusted through the adjusting pad 5 to control the magnitude of the end face pressure.

[0019] The elastic element 6 and the adjusting pad 5 are connected by interference fit.

[0020] The elastic element 6 is made of a polyurethane rod, and the size of the polyurethane rod is determined by calculating the end face pressure required by the product.

[0021] The driving center 4 and the side surface of the clamping seat 1 are respectively fixedly connected through driving center adjusting bolts 2. By adjusting the driving center adjusting bolts 2, the driving center 4 is adjusted to the optimal position and fixed tightly by the driving center fixing bolt 3.

[0022] Furthermore, in order to facilitate pre-adjusting the machine tool tailstock 9 to reach the required position, a workpiece auxiliary support 7 is also fixedly arranged at the bottom of the machine tool tailstock 9. One end top of the workpiece auxiliary support 7 is fixedly welded to the machine tool tailstock 9, and a movable block 10 is movably arranged at the other end top. During use, the workpiece is adjusted to the corresponding position by contacting the surface of the movable block 10 with the workpiece.

[0023] The workpiece auxiliary support 7 is of a U-shaped structure. A through hole 11 is arranged inside one side of the workpiece auxiliary support 7 provided with the movable block 10. A piston rod 12 fixedly connected to the bottom of the movable block 10 is arranged in the through hole 11. The bottom of the piston rod 12 is connected to a first hydraulic cylinder 13. When it is necessary to radially adjust the height of the workpiece, the piston rod 12 is pushed by the action of the first hydraulic cylinder 13, and the movable block 10 pushes the workpiece to the required position under the push of the piston rod 12.

[0024] Further, in order to facilitate the axial displacement between the tailstock 9 of the machine tool and the driving center 4 to clamp the workpiece, a push plate 14 is fixedly provided at the tail end of the tailstock 9 of the machine tool. One side of the push plate 14 is fixed to the tailstock 9, and a piston rod 12 is fixedly provided at the center position on the other side of the push plate 14. A second hydraulic cylinder 15 is provided on the piston rod 12. When it is necessary to clamp the workpiece, by starting the second hydraulic cylinder 15, the push plate 14 is forced to move the tailstock center 8 towards the driving center 4 under the push of the piston rod 12, thereby realizing the axial clamping of the workpiece.

Claims

1. Elastic clamping device for turning end faces, characterized in that: It includes a clamping seat, a driving center, a driving center fixing bolt, an adjusting pad, an elastic element, and a tailstock center. A driving center is provided on one side of the clamping seat. One side of the driving center is fixedly connected to the clamping seat through the driving center fixing bolt. A stepped structure is provided on the outer circumference of the other side of the driving center. An elastic element is sleeved around the stepped structure. A workpiece is arranged at the end face of the elastic element in the same direction as the center of the driving center. One end side center of the workpiece contacts the driving center, and a tailstock center is provided at the center position of the other end side of the workpiece. The tailstock center is fixedly connected to the machine tool tailstock. An adjusting pad is provided between the elastic element and the stepped side wall of the driving center. The elastic element is a polyurethane rod. The length of the elastic element can be adjusted by the adjusting pad to control the magnitude of the end face pressure. A workpiece auxiliary support is also fixedly provided at the bottom of the machine tool tailstock. One end top of the workpiece auxiliary support is fixedly welded to the machine tool tailstock, and a movable block is movably provided at the other end top. The workpiece auxiliary support is of a U-shaped structure. A through hole is provided inside one side of the workpiece auxiliary support where the movable block is provided. A piston rod fixedly connected to the bottom of the movable block is provided in the through hole, and the bottom of the piston rod is connected to a first hydraulic cylinder. A push plate is also fixedly provided at the tail end of the machine tool tailstock. One side of the push plate is fixed to the machine tool tailstock, and a piston rod is fixedly provided at the center position of the other side of the push plate. A second hydraulic cylinder is provided on the piston rod.

2. The elastic clamping device for turning end faces according to claim 1, characterized in that: The driving center and the side surface of the clamping seat are fixedly connected respectively through driving center adjusting bolts.

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