A double-clamping composite power chuck with outer clamp and inner support
By designing the external clamping and inner support double clamping composite power chuck, the linkage mechanism between the clamping and centering tie rods is used to solve the problem of clamping positioning in the existing technology, and the stable fixation and accuracy of thin-walled parts are achieved Processing improves product pass rate.
Patent Information
- Application Number
- CN202010047413.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-01-16
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2040-01-16
AI Technical Summary
When processing thin-walled metal pipes, the existing three-claw chucks have strong cutting force, making it difficult to achieve clamping positioning, which affects the processing accuracy and product qualification rate.
Design an outer clamping and inner bracing double clamping composite power chuck, including an outer clamping chuck, base claw, top claw, centering chuck, centering chuck, flange, clamping lever and centering lever, through The combination of inner support and outer clamping uses the linkage mechanism of the clamping pull rod and the centering pull rod to form a clamping cavity to stabilize and fix the workpiece.
Effectively prevent thin-walled parts from deforming, improve product qualification rate, ensure processing accuracy and stability, and are especially suitable for thin-walled parts that are prone to deform.
Smart Images
Figure CN111136291B_ABST
Abstract
Description
[Technical field]
[0001] The invention relates to the technical field of processing thin-walled cylindrical parts, in particular to an outer-clamping and inner-supporting double-clamping composite power chuck. [Background technology]
[0002] In the existing processing technology of thin-walled parts that are easy to deform, such as missile shells, a three-jaw chuck is often used to clamp the edge of the workpiece for fixation. However, it is found in production that due to the special material and strong cutting force, the clamping positioning of the three-jaw chuck cannot meet the clamping requirements, and the assembly accuracy is not easy to ensure, which in turn affects the processing accuracy of thin-walled metal tube products. Therefore, a double-clamping composite power chuck with an outer clamp and an inner support is proposed. [Summary of the invention]
[0003] The purpose of the present invention is to solve the problems in the prior art and to propose an outer clamping and inner supporting double clamping composite power chuck, which can effectively prevent the deformation of thin-walled parts, ensure the deformation amount of the workpiece, and effectively improve the product qualification rate.
[0004] To achieve the above-mentioned purpose, the present invention proposes an outer clamping and inner supporting double clamping composite power chuck, comprising an outer clamping chuck, a base jaw, a top jaw, a centering chuck, a centering jaw, a flange, a clamping rod, and a centering rod. The flange is connected to a machine tool spindle and rotates synchronously with the machine tool spindle. The outer clamping chuck is connected to the flange by fixing bolts. A plurality of base jaws are arranged circumferentially on the outer clamping chuck. A top jaw is installed on the base jaw. The top jaw is used to press and fit with the outer wall of the workpiece. The clamping rod is linked with the outer clamping chuck and the top jaw. The clamping rod moves along its axial direction to drive the top jaw to expand or contract radially through the outer clamping chuck. The centering chuck is installed on one end of the outer clamping chuck and is connected to the centering rod. A plurality of centering claws are installed on the centering chuck. The centering claws are used to abut against the inner wall of the workpiece. The centering rod cooperates with the centering chuck and the centering claws. The centering rod moves along its axial direction to drive the centering claw to expand or contract radially through the centering chuck. A clamping cavity for clamping the workpiece is formed between the outer wall of the centering claw and the inner wall of the top claw.
[0005] Preferably, it also includes a mounting seat, the center of the outer clamp chuck has a first mounting cavity, the mounting seat is fixedly installed in the first mounting cavity of the outer clamp chuck, the centering chuck is connected to the outer clamp chuck through the mounting seat, the mounting seat has a first central cavity for the centering rod to pass through, and a sealing ring that fits tightly with the centering rod is installed in the first central cavity.
[0006] Preferably, a first anti-loosening disk is also installed in the outer clamping chuck, a first guide sleeve is provided between the clamping rod and the first anti-loosening disk, a first anti-loosening mechanism is installed on the inner ring of the first anti-loosening disk, the first anti-loosening mechanism abuts against the first guide sleeve, a second guide sleeve is provided between the centering chuck and the centering rod, a second anti-loosening mechanism is installed at the end of the centering rod, the second anti-loosening mechanism abuts against the second guide sleeve, and the first anti-loosening mechanism and the second anti-loosening mechanism respectively have a clamping bead equipped with a spring.
[0007] Preferably, a positioning portion is provided on the outer side of the centering jaw, the outer wall of the positioning portion has a first arcuate surface, the inner wall of the top jaw has a second arcuate surface, a clamping cavity for clamping a workpiece is formed between the first arcuate surface and the second arcuate surface, a planar notch is provided in the middle position of the first arcuate surface, and an inward-concave notch is provided in the middle position of the second arcuate surface of the top jaw, and the planar notch and the inward-concave notch are arranged opposite to each other.
[0008] Preferably, the clamping rod has an inner cavity for the centering rod to pass through, and the clamping rod is coaxially arranged with the centering rod.
[0009] Preferably, the centering chuck is provided with three centering jaws at equal intervals in the circumferential direction, with a gap between two adjacent centering jaws, and the outer clamping chuck is provided with three base jaws at equal intervals in the circumferential direction, and the three base jaws are respectively provided with three top jaws corresponding to the centering jaws one by one, with a gap between two adjacent top jaws.
[0010] The beneficial effects of the present invention: The present invention can ensure stable processing under small force through the coordination of external clamping chuck, base jaws, top jaws, centering chuck, centering jaws, flange, clamping rod, centering rod, etc., so as to ensure the deformation of the workpiece and effectively improve the product qualification rate. The clamp is particularly suitable for thin-walled parts that are easy to deform and can avoid deformation of thin-walled parts.
[0011] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.
Brief Description of the Drawings
[0012] Figure 1 It is a cross-sectional schematic diagram of an outer-clamping and inner-supporting double-clamping composite power chuck of the present invention;
[0013] Figure 2 It is a left side schematic diagram of an outer clamping and inner supporting double clamping composite power chuck of the present invention. [Specific implementation method]
[0014] See also Figure 1 to Figure 2The present invention discloses an outer clamping and inner supporting double clamping composite power chuck, comprising an outer clamping chuck 1, a base jaw 2, a top jaw 3, a centering chuck 4, a centering jaw 5, a flange 8, a clamping pull rod 9, and a centering pull rod 10. The flange 8 is connected to a machine tool spindle and rotates synchronously with the machine tool spindle. The outer clamping chuck 1 is connected to the flange 8 by fixing bolts. A plurality of base jaws 2 are arranged circumferentially on the outer clamping chuck 1. A top jaw 3 is installed on the base jaw 2. The top jaw 3 is used to press and fit with the outer wall of the workpiece. The clamping pull rod 9 cooperates with the outer clamping chuck 1 and the top jaw 3. The tension rod 9 moves along its axial direction through the outer clamping chuck 1 to drive the top jaw 3 to expand or contract radially. The centering chuck 4 is installed on one end of the outer clamping chuck 1 and is connected to the centering rod 10. A plurality of centering claws 5 are installed on the centering chuck 4. The centering claws 5 are used to abut against the inner wall of the workpiece. The centering rod 10 cooperates with the centering chuck 4 and the centering claws 5. The centering rod 10 moves along its axial direction through the centering chuck 4 to drive the centering claws 5 to expand or contract radially. A clamping cavity for clamping the workpiece is formed between the outer wall of the centering claw 5 and the inner wall of the top jaw 3.
[0015] Furthermore, it also includes a mounting seat 7, the center of the outer clamping chuck 1 has a first mounting cavity 11, the mounting seat 7 is fixedly mounted in the first mounting cavity 11 of the outer clamping chuck 1, the centering chuck 4 is connected to the outer clamping chuck 1 through the mounting seat 7, the mounting seat 7 has a first central cavity for the centering rod 10 to pass through, and a sealing ring 70 that closely matches the centering rod 10 is installed in the first central cavity. Adding a sealing ring in the mounting seat 7 can ensure that no iron filings or other debris enter the inside of the bed to ensure the service life of the machine tool.
[0016] Furthermore, a first anti-loosening disk 13 is installed in the outer clamping chuck 1, a first guide sleeve 91 is provided between the clamping pull rod 9 and the first anti-loosening disk 13, a first anti-loosening mechanism 12 is installed on the inner ring of the first anti-loosening disk 13, the first anti-loosening mechanism 12 is abutted against the first guide sleeve 91, a second guide sleeve 41 is provided between the centering chuck 4 and the centering pull rod 10, a second anti-loosening mechanism 101 is installed at the end of the centering pull rod 10, the second anti-loosening mechanism 101 is abutted against the second guide sleeve 41, and the first anti-loosening mechanism 12 and the second anti-loosening mechanism 41 are respectively provided with spring-equipped beads. The anti-loosening mechanism can ensure the stability of the inner support centering chuck 4 and the outer clamping chuck 1.
[0017] Further, a positioning portion 6 is provided on the outer side of the centering jaw 5, the outer wall of the positioning portion 6 has a first arc surface, the inner wall of the top jaw 3 has a second arc surface, a clamping cavity for clamping a workpiece is formed between the first arc surface and the second arc surface, a plane notch 61 is provided in the middle position of the first arc surface, a concave notch 31 is provided in the middle position of the second arc surface of the top jaw 3, and the plane notch 61 is arranged opposite to the concave notch 31. The plane notch 61 and the concave notch 31 are arranged to facilitate material cutting.
[0018] Furthermore, the interior of the clamping rod 9 has an inner cavity for the centering rod 10 to pass through, and the clamping rod 9 is coaxially arranged with the centering rod 10. The centering chuck 4 is provided with three centering claws 5 at equal intervals in the circumferential direction, and there is a gap between two adjacent centering claws 5. The outer clamping chuck 1 is provided with three base jaws 2 at equal intervals in the circumferential direction, and three top jaws 3 corresponding to the centering claws 5 are respectively arranged on the three base jaws 2, and there is a gap between two adjacent top jaws 3.
[0019] Working principle of the present invention:
[0020] The flange 8 is connected to the main shaft of the machine tool and can rotate synchronously with the main shaft of the machine tool. The outer clamping chuck 1 is connected to the flange 8 through fixing bolts, and the centering chuck 4 is connected to the outer clamping chuck 1 through a mounting seat 7.
[0021] Movement process:
[0022] The workpiece 100 is placed on the positioning portion 6, and the centering pull rod 10 moves to the right and is converted into a centering claw 5 through the centering chuck 4 to move outward to support the workpiece 100 to ensure the centering of the workpiece.
[0023] The outer clamping pull rod 9 moves to the left and is converted into the outer clamping chuck 1 so that the top claw 3 moves inward to clamp the workpiece 100 to ensure the stability of workpiece processing.
[0024] The outer clamping chuck and the centering chuck have the same operating principle, and both use a wedge structure for motion conversion, which converts the axial movement of the centering rod 10 into the radial movement of the claw 5 and converts the axial movement of the outer clamping rod 9 into the radial movement of the top claw 3.
[0025] Advantages of this chuck: For thin-walled parts that are easy to deform, the fixture can ensure stable processing under low force through internal support + external clamping, thereby ensuring the deformation of the workpiece and effectively improving the product qualification rate.
[0026] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.
Claims
1. A double-clamping composite power chuck with outer clamp and inner support, Features: The invention comprises an outer clamping chuck (1), a base jaw (2), a top jaw (3), a centering chuck (4), a centering jaw (5), a flange (8), a clamping rod (9), and a centering rod (10); the flange (8) is connected to a main shaft of a machine tool; the outer clamping chuck (1) is connected to the flange (8) by fixing bolts; a plurality of base jaws (2) are arranged circumferentially on the outer clamping chuck (1); a top jaw (3) is installed on the base jaw (2); the top jaw (3) is used for pressing and fitting with the outer wall of a workpiece (100); the clamping rod (9) is linked with the outer clamping chuck (1) and the top jaw (3); the clamping rod (9) moves along its axial direction. The top jaw (3) is driven to expand or contract radially by the outer clamping chuck (1). The centering chuck (4) is installed on one end of the outer clamping chuck (1) and is connected to the centering rod (10). A plurality of centering jaws (5) are installed on the centering chuck (4). The centering jaws (5) are used to abut against the inner wall of the workpiece (100). The centering rod (10) cooperates with the centering chuck (4) and the centering jaws (5). The centering rod (10) moves along its axial direction through the centering chuck (4) to drive the centering jaws (5) to expand or contract radially. A clamping cavity for clamping the workpiece is formed between the outer wall of the centering jaw (5) and the inner wall of the top jaw (3).
2. An external clamping and internal support double clamping composite power chuck as claimed in claim 1, Features: It also includes a mounting seat (7), the center of the outer clamping chuck (1) has a first mounting cavity (11), the mounting seat (7) is fixedly installed in the first mounting cavity (11) of the outer clamping chuck (1), the centering chuck (4) is connected to the outer clamping chuck (1) through the mounting seat (7), the mounting seat (7) has a first central cavity for the centering rod (10) to pass through, and a sealing ring (70) that tightly fits the centering rod (10) is installed in the first central cavity.
3. An external clamping and internal support double clamping composite power chuck as claimed in claim 1, Features: A first anti-loosening disk (13) is also installed in the outer clamping chuck (1), a first guide sleeve (91) is provided between the clamping pull rod (9) and the first anti-loosening disk (13), a first anti-loosening mechanism (12) is installed on the inner ring of the first anti-loosening disk (13), the first anti-loosening mechanism (12) and the first guide sleeve (91) are abutted against each other, a second guide sleeve (41) is provided between the centering chuck (4) and the centering pull rod (10), a second anti-loosening mechanism (101) is installed at the end of the centering pull rod (10), the second anti-loosening mechanism (101) and the second guide sleeve (41) are abutted against each other, and the first anti-loosening mechanism (12) and the second anti-loosening mechanism (41) are respectively provided with spring-equipped clamping beads.
4. An external clamping and internal support double clamping composite power chuck as claimed in claim 1, Features: A positioning portion (6) is provided on the outer side of the centering clamping jaw (5), the outer wall of the positioning portion (6) has a first arcuate surface, the inner wall of the top jaw (3) has a second arcuate surface, a clamping cavity for clamping a workpiece is formed between the first arcuate surface and the second arcuate surface, a plane notch (61) is provided in the middle of the first arcuate surface, an inner concave notch (31) is provided in the middle of the second arcuate surface of the top jaw (3), and the plane notch (61) and the inner concave notch (31) are arranged opposite to each other.
5. An external clamping and internal support double clamping composite power chuck as claimed in claim 1, Features: The interior of the clamping pull rod (9) has an inner cavity for the centering pull rod (10) to pass through, and the clamping pull rod (9) and the centering pull rod (10) are coaxially arranged.
6. An external clamping and internal support double clamping composite power chuck as claimed in claim 1, Features: The centering chuck (4) is provided with three centering jaws (5) at equal intervals in the circumferential direction, and a gap is provided between two adjacent centering jaws (5); the outer clamping chuck (1) is provided with three base jaws (2) at equal intervals in the circumferential direction, and the three base jaws (2) are respectively provided with three top jaws (3) corresponding to the centering jaws (5) one by one, and a gap is provided between two adjacent top jaws (3).