Pull rod self-locking clamping positioning device

Abstract

The utility model provides a kind of pull rod self-locking clamping positioning device, including pressing plate self-locking clamping device and profiling positioning connecting device, pressing plate self-locking clamping device includes pressing plate, spring, plug block, baffle, pull rod and connector, profiling positioning connecting device includes positioning member, base and flange, connector front end passes through flange center through-hole and pull rod rear end fixed connection, base is embedded in the front end of flange, two plug blocks are installed in the sliding slot of pull rod front end, two springs are loaded into the spring hole of plug block, baffle is symmetrically installed in base left and right sides, baffle inside slope and plug block outside slope closely adhere, positioning member is fixed in the front end of base, workpiece is installed in the front end of positioning member, the front of pressing plate is equipped with conical platform, the rear end of conical platform presses workpiece, pressing block rear end annular boss extends to the inner hole of pull rod rear portion;The utility model can complete the positioning clamping and taking and placing of workpiece, be applicable to aluminum die casting, pouring molding and powder metallurgy, work stable, strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of product processing technology, and more specifically, to a tie rod self-locking clamping and positioning device for irregular structural components of CNC lathes and CNC milling and turning composite machine tools. Background Technology

[0002] Precision product OEM manufacturing is an important guarantee for driving product transformation and upgrading. OEM factories need to customize or manufacture equipment that is suitable for the products being processed, based on the structural characteristics of the products and the technical parameters required for processing. Among them, the self-locking clamping and positioning device of the pull rod is indispensable. The clamping and positioning devices of existing CNC lathes and CNC milling and turning machines generally adopt a unidirectional clamping mechanical structure. This clamping structure cannot be adapted to the machining of irregular structural parts. Therefore, it is still necessary to further improve the structure of the existing clamping and positioning devices to adapt to the machining of products with different shapes and structures. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, this utility model proposes a pull rod self-locking clamping and positioning device to solve the problems of preventing loosening after clamping special irregular shaped products, preventing product deformation during processing, and difficulties in clamping with robotic arms.

[0004] This utility model discloses a self-locking clamping and positioning device for a pull rod, including a pressure plate self-locking clamping device and a contour positioning connection device. The pressure plate self-locking clamping device includes a pressure plate, springs, inserts, a baffle, a pull rod, and a connector. The contour positioning connection device includes a positioning element, a base, and a flange. The rear end of the flange is connected to the front end of the machine tool spindle. The rear end of the connector is threaded to the machine tool hydraulic rod. The front end of the connector passes through a through hole in the center of the flange and is fixedly connected to the rear end of the pull rod. The base is embedded in the front end of the flange. Two inserts are symmetrically installed in the grooves at the front end of the pull rod. Two springs are respectively inserted into the springs of the inserts. The hole has two baffles symmetrically installed on the left and right sides of the base. The inclined surface of the inner side of the baffle is in close contact with the inclined surface of the outer side of the insert block. The inclined surface of the inner side of the baffle and the inclined surface of the outer side of the insert block are inclined inward from front to back. The positioning member is fixed to the front end of the base. The workpiece is installed at the front end of the positioning member. The front part of the pressure plate has a truncated cone. The rear end of the truncated cone presses against the center hole of the rear part of the workpiece. The rear end of the pressure block has an annular boss. The rear part of the pressure block passes through the inner side of the insert block and extends into the inner hole of the rear part of the pull rod. The two ends of the spring in the radial direction respectively press against the spring hole of the insert block and the outer wall of the rear part of the pressure plate to prevent the annular boss from coming out forward from the inner side of the insert block.

[0005] Furthermore, the flange has an annular groove at its rear end, which matches the central protrusion at the front end of the machine tool spindle.

[0006] Furthermore, the flange is fixedly connected to the machine tool spindle by hex socket screws to maintain concentricity.

[0007] Furthermore, the front end of the connector and the rear end of the pull rod are fixedly connected by a headless screw.

[0008] Furthermore, the front end of the flange is provided with a circular groove, and the rear end of the base is engaged with the circular groove.

[0009] Furthermore, four hexagonal screws are evenly arranged radially on the outer side of the circular groove, and the concentricity between the base and the machine tool spindle is adjusted by the hexagonal screws.

[0010] This utility model device can realize the functions of initial positioning, clamping, pressing and interlocking in one. The device includes a pressure plate self-locking clamping device and a contour positioning connection device. The power source is the hydraulic system of the machine tool body. During assembly, each component is precisely connected by screws and threads to ensure concentricity and fitting accuracy. When this utility model device is working, the hydraulic switch controls the hydraulic rod to drive the connecting head and the pull rod to move. By utilizing the inclined surface cooperation between the insert block and the baffle and the elastic effect of the spring, the pressure plate is tightened and loosened, and the workpiece is positioned, clamped and picked up. It is suitable for aluminum die casting, casting and powder metallurgy. It is stable in operation and highly practical. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure assembly of this utility model; Figure 2 This is a disassembled schematic diagram of the overall structure of this utility model.

[0012] Attached Figure

[0013] 1. Workpiece, 2. Pressure plate, 3. Positioning component, 4. Spring, 5. Insert block 6. Baffle, 7. Base, 8. Tie rod, 9. Connector, 10. Flange 201 Frustum conical, 202 Annular boss 1001 circular groove. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] This embodiment discloses a self-locking clamping and positioning device for a pull rod, such as Figure 1and Figure 2 As shown, it includes a pressure plate self-locking clamping device and a contour positioning connection device. The pressure plate self-locking clamping device includes a pressure plate 2, a spring 4, a plug 5, a baffle 6, a pull rod 8, and a connector 9. The pressure plate self-locking clamping device plays a role in clamping the workpiece 1. The contour positioning connection device includes a positioning component 3, a base 7, and a flange 10. The contour positioning connection device plays a role in positioning the workpiece 1 and connecting the various components.

[0016] The rear end of the flange 10 is connected to the front end of the machine tool spindle. The rear end of the connector 9 is connected to the machine tool hydraulic rod by a thread. The front end of the connector 9 passes through the through hole in the center of the flange 10 and is fixedly connected to the rear end of the pull rod 8. The front end of the connector 9 and the rear end of the pull rod 8 are fixedly connected by a headless screw.

[0017] The base 7 is embedded in the front end of the flange 10. Two inserts 5 are symmetrically installed in the groove at the front end of the pull rod 8. Two springs 4 are respectively installed in the spring holes of the inserts 5. Two baffles 6 are symmetrically installed on the left and right sides of the base 7. The inclined surface on the inner side of the baffle 6 is in close contact with the inclined surface on the outer side of the insert 5. The inclined surface on the inner side of the baffle 6 and the inclined surface on the outer side of the insert 5 are inclined inward from front to back. The positioning piece 3 is fixed at the front end of the base 7. The workpiece 1 is installed at the front end of the positioning piece 3.

[0018] like Figure 1 and Figure 2 As shown, the front part of the pressure plate 2 is provided with a truncated cone 201, and the rear end of the truncated cone presses against the center hole of the rear part of the workpiece 1. The rear end of the pressure block 2 is provided with an annular boss 202. The rear part of the pressure block 2 passes through the inner side of the insert block 5 and extends into the inner hole of the rear part of the pull rod 8. The two ends of the spring 4 in the radial direction respectively press against the spring hole of the insert block 5 and the outer wall of the rear part of the pressure plate 2, preventing the annular boss 202 from coming out forward from the inner side of the insert block 5.

[0019] The flange 10 has an annular groove at the center of its rear end, which matches the central protrusion at the front end of the machine tool spindle. The flange 10 is fixedly connected to the machine tool spindle by hexagonal screws to maintain concentricity.

[0020] The front end of the flange 10 is provided with a circular groove, and the rear end of the base 7 is inserted into the circular groove. Four hexagon socket screws are evenly arranged radially around the outer side of the groove at the front end of the flange 10. The concentricity between the base 7 and the machine tool spindle is adjusted by the hexagon socket screws.

[0021] In this embodiment, the various components of the self-locking clamping and positioning device for the pull rod are interconnected, forming the main body of the entire self-locking clamping and positioning device. The specific implementation includes the following steps: In this embodiment, the self-locking clamping and positioning device for the tie rod is an auxiliary device for a lathe production line, and the power source is hydraulic. Click the hydraulic switch, and the machine tool hydraulic rod will drive the connector 9 forward until the top of the pull rod 8 coincides with the bottom of the inner side of the base 7, and the operation will stop under the obstruction of the base 7; Place workpiece 1 on the upper end of positioning member 3, so that the bottom plane and side plane of workpiece 1 coincide with the upper surface of positioning member 3 respectively; The pressure plate 2 is passed through the inner side of the center of the workpiece 1, so that the cone 201 at the top of the pressure plate 2 presses against the upper inner surface of the workpiece 1, while the annular boss 202 at the bottom passes through the middle of the head of the insert block 5. At this time, the annular boss 202 is located inside the center of the pull rod 8. Click the hydraulic switch, and the connector 9 drives the pull rod 8 to move backward. Since the inclined surface on the outer side of the insert block 5 and the inclined surface on the inner side of the baffle 6 overlap, when the pull rod 8 drives the insert block 5 to move backward, the insert block 5 moves inward under the action of the inclined surface. The spring 4 contracts under the pressure, causing the insert block to lock the annular boss 202, which drives the cone 201 to tighten the workpiece 1. The machine stops running while workpiece 1 is being tightened, thus completing the clamping and positioning of workpiece 1. Click the hydraulic switch, pull rod 8 pushes forward, insert block 5 moves forward away from the inner inclined surface of baffle 6, spring 4 resets and pushes insert block 5 outward back to its original position, the slot formed by insert block 5 disappears and no longer jams the annular boss 202, at this time the pressure plate 2 can be taken out, and then the workpiece 1 can be taken out. This completes one full operation.

[0022] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A self-locking clamping and positioning device for a pull rod, characterized in that, The device includes a self-locking clamping device and a contour positioning connection device. The self-locking clamping device includes a clamping plate (2), a spring (4), a plug (5), a baffle (6), a pull rod (8), and a connector (9). The contour positioning connection device includes a positioning element (3), a base (7), and a flange (10). The rear end of the flange (10) is connected to the front end of the machine tool spindle. The rear end of the connector (9) is connected to the machine tool hydraulic rod by a thread. The front end of the connector (9) passes through the through hole in the center of the flange (10) and is fixedly connected to the rear end of the pull rod (8). The base (7) is embedded in the front end of the flange (10). Two plugs (5) are symmetrically installed in the grooves at the front end of the pull rod (8). Two springs (4) are respectively installed in the spring holes of the plugs (5). Two baffles (6) are symmetrically installed in the grooves at the front end of the pull rod (8). On the left and right sides of the base (7), the inclined surface of the inner side of the baffle (6) is closely fitted with the inclined surface of the outer side of the insert (5). The inclined surface of the inner side of the baffle (6) and the inclined surface of the outer side of the insert (5) are inclined inward from front to back. The positioning member (3) is fixed to the front end of the base (7). The workpiece (1) is installed at the front end of the positioning member (3). The front part of the pressure plate (2) is provided with a truncated cone (201). The rear end of the truncated cone presses against the center hole of the rear part of the workpiece (1). The rear end of the pressure plate (2) is provided with an annular boss (202). The rear part of the pressure plate (2) passes through the inner side of the insert (5) and extends into the inner hole of the rear part of the pull rod (8). The two ends of the spring (4) in the radial direction respectively press against the spring hole of the insert (5) and the outer wall of the rear part of the pressure plate (2) to prevent the annular boss (202) from coming out forward from the inner side of the insert (5).

2. The self-locking clamping and positioning device for a pull rod according to claim 1, characterized in that, The flange (10) has an annular groove at the center of its rear end, which matches the central protrusion at the front end of the machine tool spindle.

3. The self-locking clamping and positioning device for a pull rod according to claim 1, characterized in that, The flange (10) is fixedly connected to the machine tool spindle by internal hex bolts to maintain concentricity.

4. The self-locking clamping and positioning device for a pull rod according to claim 1, characterized in that, The front end of the connector (9) and the rear end of the pull rod (8) are fixedly connected by a headless screw.

5. The self-locking clamping and positioning device for a pull rod according to claim 1, characterized in that, The flange (10) has a circular groove (1001) at its front end, and the rear end of the base (7) is inserted into the circular groove.

6. The self-locking clamping and positioning device for a pull rod according to claim 5, characterized in that, Four hexagonal screws are evenly arranged radially on the outer side of the circular groove (1001) to adjust the concentricity of the base (7) and the machine tool spindle.

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