A fixture for lathe-shaped workpieces

Abstract

The utility model relates to a kind of fixture for lathe special-shaped workpiece, including bottom plate, the top surface of bottom plate is circular, and fixed seat is fixedly connected in the top surface of bottom plate, fixed seat is symmetrically set along the center of bottom plate, and the top surface of fixed seat is equipped with connecting rod and pressing plate, connecting rod is located in the side of pressing plate far from the center of bottom plate, and the top of pressing plate is rotatably connected with the top of connecting rod;The top surface center of bottom plate is equipped with locating taper pin, and the top surface of bottom plate is equipped with angular orientation pin near locating taper pin.The utility model relates to a kind of fixture for lathe special-shaped workpiece, can be multiple-point positioning simultaneously;Quick clamping design, improve clamping efficiency;Clamping strength is adjustable, applicable to different types of workpieces;Compact structure, small space occupation, easy to operate;Component standardization design is convenient to replace and maintenance operation simple and practical, both improve processing efficiency, and reduce the labor intensity of staff.

Description

Technical Field

[0001] This utility model relates to the field of machining, and in particular to a fixture for irregularly shaped workpieces on a lathe. Background Technology

[0002] In current machining processes, workpieces with complex shapes and numerous machining surfaces often require multiple clamping operations, which can easily lead to positioning errors, affecting machining accuracy and consequently production efficiency. While traditional three-jaw chucks for lathes have become an indispensable standard fixture due to their automatic centering, ease of operation, and versatility, they cannot clamp irregularly shaped workpieces. Therefore, designing a dedicated fixture for irregularly shaped lathe workpieces is urgently needed, and the current problem to be solved is the need for a tooling fixture that can achieve efficient clamping, precise positioning, and easy adjustment. Utility Model Content

[0003] To address the problem that positioning errors easily occur and affect machining accuracy when dealing with workpieces with complex shapes and many machining surfaces in existing machining processes, a fixture for irregularly shaped workpieces on lathes is proposed.

[0004] The technical solution of this utility model is as follows: a fixture for irregularly shaped workpieces on a lathe, including a base plate, the top surface of which is circular, a fixing seat fixedly connected to the top surface of the base plate, the fixing seats being symmetrically arranged along the center of the base plate, a connecting rod and a pressure plate being provided on the top surface of the fixing seat, the connecting rod being located on the side of the pressure plate away from the center of the base plate, and the top of the pressure plate being rotatably connected to the top of the connecting rod.

[0005] A positioning cone pin is provided at the center of the top surface of the base plate, and an angular positioning pin is provided near the positioning cone pin on the top surface of the base plate.

[0006] Preferably, the bottom plate has a positioning pin seat at the center of its top surface, and the bottom plate is connected to a positioning tapered pin through the positioning pin seat.

[0007] Preferably, a spring is provided between the positioning cone pin and the positioning pin seat.

[0008] Preferably, multiple supports are evenly provided between the positioning cone pin and the top surface of the base plate.

[0009] Preferably, the top surface of the base plate is provided with an angular positioning pin seat, and the base plate is connected to the angular positioning pin through the angular positioning pin seat.

[0010] Preferably, the fixing seat is hinged to the pressure plate via a pressure plate hinge pin.

[0011] Preferably, the top of the pressure plate is provided with a pressure head for clamping the workpiece.

[0012] Preferably, the pressure plate is hinged to the connecting rod via a connecting rod hinge pin.

[0013] Preferably, the fixing base further includes a locking member, which is connected to a connecting rod via a thread. The bottom surface of the locking member is spherical, and a spherical groove is provided at a corresponding position on the top surface of the fixing base. The bottom surface of the locking member is set in the groove.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a fixture for irregularly shaped workpieces on a lathe, which can simultaneously position multiple points; the quick clamping design improves clamping efficiency; the clamping force is adjustable and suitable for different types of workpieces; the structure is compact, occupies little space, and is easy to operate; the standardized design of the components makes it easy to replace and maintain. The operation is simple and practical, which not only improves processing efficiency but also reduces the labor intensity of employees. Attached Figure Description

[0015] Figure 1 This is a top view of the fixture for irregularly shaped workpieces on a lathe according to this utility model;

[0016] Figure 2 for Figure 1 The cross-sectional view of AA is shown in the figure, with the left half being the cross-sectional view of AA and the right half being the vertical cross-sectional view of AA.

[0017] Figure 3 This is a perspective view of the pressure plate of this utility model;

[0018] Figure 4 This is a front view of the connecting rod of this utility model;

[0019] Figure 5 This is a left view of the connecting rod of this utility model.

[0020] The component names corresponding to the various reference numerals in the diagram are as follows:

[0021] 1. Base plate; 2. Fixing seat; 21. Locking component; 3. Connecting rod; 31. Connecting rod hinge pin; 4. Pressure plate; 41. Pressure plate hinge pin; 42. Pressure head; 5. Positioning cone pin; 51. Positioning pin seat; 52. Support; 6. Angular positioning pin; 61. Angular positioning pin seat. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0023] refer to Figure 1 , 2As shown in the figure, this application discloses a fixture for irregularly shaped workpieces on a lathe, including a base plate 1 with a circular top surface. A fixing seat 2 is bolted to the top surface of the base plate 1. The fixing seat 2 is symmetrically arranged along the center of the base plate 1. A connecting rod 3 and a pressure plate 4 are provided on the top surface of the fixing seat 2. The connecting rod 3 is located on the side of the pressure plate 4 away from the center of the base plate 1. The top of the pressure plate 4 is rotatably connected to the top of the connecting rod 3. The pressure plate 4 prevents the workpiece from undergoing radial or axial displacement during processing.

[0024] A positioning cone pin 5 is provided at the center of the top surface of the base plate 1, and an angular positioning pin 6 is provided near the positioning cone pin 5 on the top surface of the base plate 1. The angular positioning pin 6 can be a cylindrical pin, and the angular positioning pin 6 is located on the diameter of the base plate 1 perpendicular to the axis of the fixed seat 2.

[0025] Specifically, the top surface of the base plate 1 has a groove at its center, and a positioning pin seat 51 is fixedly connected to the groove by bolts. The bottom of the positioning cone pin 5 has a protrusion, and the center of the positioning pin seat 51 has a groove. The bottom of the positioning cone pin 5 is inserted into the center groove of the positioning pin seat 51 and connected to each other by bolts. A spring is provided between the positioning cone pin 5 and the positioning pin seat 51, so the positioning cone pin 5 can float up and down on the positioning pin seat 51. The floating positioning cone pin 5 is conducive to matching the diameter of the pre-cast hole of the irregular blank, realizing self-centering positioning, and ensuring accurate positioning of the blank and tooling.

[0026] Multiple supports 52 are evenly provided between the positioning cone pin 5 and the top surface of the base plate 1. In this example, there are 4 supports 52. The supports 52 are connected to the base plate 1 by bolts. The supports position the workpiece on the surface to ensure that the workpiece is at the same height.

[0027] The top surface of the base plate 1 is provided with an angular positioning pin seat 61, which is connected to the base plate 1 by bolts. The center of the angular positioning pin seat 61 is provided with a groove, and the angular positioning pin 6 is inserted into the groove. The angular positioning pin seat 61 and the angular positioning pin 6 are connected by bolts.

[0028] refer to Figure 2 , 3 As shown, the fixed base 2 is hinged to the pressure plate 4 via the pressure plate hinge pin 41, and a locking bolt is provided between the pressure plate 4 and the pressure plate hinge pin 41.

[0029] The pressure plate 4 is provided with a pressure head 42 on its top. The pressure plate 4 is connected to the pressure head 42 by bolts. The pressure head 42 contacts the workpiece to achieve a clamping effect.

[0030] The pressure plate 4 is hinged to the connecting rod 3 via the connecting rod hinge pin 31, and a locking bolt is provided between the connecting rod 3 and the connecting rod hinge pin 31.

[0031] refer to Figure 2 , 4As shown in Figure 5, the fixed base 2 also includes a locking element 21, which is a locking nut. The locking element 21 is connected to the connecting rod 3 via a thread. The locking element 21 has a hexagonal structure, making it easy to disassemble with a wrench. The bottom surface of the locking element 21 is spherical, and a corresponding recessed spherical groove is provided on the top surface of the fixed base 2. The bottom surface of the locking element 21 is set in the groove. By using the lever principle to turn the locking element 21, the workpiece is clamped, preventing it from shaking during processing. The locking element 21 and the connecting rod 3 are adjustable by a fine-tuning method, and the clamping force can be precisely controlled through threaded transmission. The clamping and loosening operations can be completed by rotating the locking element 21, improving the efficiency of workpiece changeover.

[0032] The specific working method is as follows:

[0033] The pre-cast hole of the workpiece is placed on the positioning cone pin 5. The positioning cone pin 5 cooperates with the pre-cast hole of the workpiece to achieve centering. The angular positioning pin 6 cooperates with the angular pre-cast hole of the workpiece to achieve angle positioning.

[0034] Flip the pressure plate 4 and clamp it onto the workpiece. Tighten the locking part 21 with a wrench to clamp the workpiece and restrict its vertical freedom.

[0035] The beneficial effects are:

[0036] This utility model discloses a fixture for irregularly shaped workpieces on a lathe, which can simultaneously position multiple points; it features a quick clamping design to improve clamping efficiency; the clamping force is adjustable to suit different types of workpieces; it has a compact structure, occupies little space, and is easy to operate; the standardized design of the components facilitates replacement and maintenance; and it is simple to operate and highly practical, which not only improves processing efficiency but also reduces the labor intensity of employees.

[0037] It should be noted that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. "A plurality of" means two or more. "Installed," "connected," and "joined" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A fixture for irregularly shaped workpieces on a lathe, characterized in that, Includes a base plate (1), the top surface of which is circular. A fixing seat (2) is fixedly connected to the top surface of the base plate (1). The fixing seat (2) is symmetrically arranged along the center of the base plate (1). A connecting rod (3) and a pressure plate (4) are provided on the top surface of the fixing seat (2). The connecting rod (3) is located on the side of the pressure plate (4) away from the center of the base plate (1). The top of the pressure plate (4) is rotatably connected to the top of the connecting rod (3). The top surface of the base plate (1) is provided with a positioning cone pin (5) at the center, and the top surface of the base plate (1) is provided with an angular positioning pin (6) near the positioning cone pin (5).

2. The fixture for irregularly shaped workpieces on a lathe according to claim 1, characterized in that, The bottom plate (1) has a positioning pin seat (51) at the center of its top surface, and the bottom plate (1) is connected to the positioning cone pin (5) through the positioning pin seat (51).

3. The fixture for irregularly shaped workpieces on a lathe according to claim 2, characterized in that, A spring is provided between the positioning cone pin (5) and the positioning pin seat (51).

4. The fixture for irregularly shaped workpieces on a lathe according to claim 2, characterized in that, Multiple supports (52) are evenly provided between the positioning cone pin (5) and the top surface of the base plate (1).

5. The fixture for irregularly shaped workpieces on a lathe according to claim 1, characterized in that, The top surface of the base plate (1) is provided with an angular positioning pin seat (61), and the base plate (1) is connected to the angular positioning pin (6) through the angular positioning pin seat (61).

6. The fixture for irregularly shaped workpieces on a lathe according to claim 1, characterized in that, The fixed seat (2) is hinged to the pressure plate (4) via a pressure plate hinge pin (41).

7. The fixture for irregularly shaped workpieces on a lathe according to claim 1, characterized in that, The top of the pressure plate (4) is provided with a pressure head (42) for clamping the workpiece.

8. The fixture for irregularly shaped workpieces on a lathe according to claim 1, characterized in that, The pressure plate (4) is hinged to the connecting rod (3) via the connecting rod hinge pin (31).

9. The fixture for irregularly shaped workpieces on a lathe according to claim 1, characterized in that, The fixed base (2) also includes a locking member (21), which is connected to the connecting rod (3) by a thread. The bottom surface of the locking member (21) is spherical, and the top surface of the fixed base (2) is provided with a spherical groove at the corresponding position. The bottom surface of the locking member (21) is set in the groove.

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