Workpiece holding device for a positioner

Abstract

The utility model relates to a workpiece holds solid device for positioner, including bottom disc, left side holds and clamps, right side holds and clamps and holds and clamps open and shut control mechanism, bottom disc coaxial fixed in workpiece installation platform of double -shaft positioner, be equipped with positioning pin and screw hole on the middle disc part of bottom disc, left, right side holds and clamps with workpiece installation platform's axle center of double -shaft positioner as center appear left and right symmetry and set up, both sides holds and clamps all are by bottom plate, stand and strengthen the rib and constitute, bottom plate and bottom disc upper end are connected through linear guide pair, be equipped with vertical guide rail in stand inboard, holds and clamps open and shut control mechanism is by left side and right side holds and clamps movement drive mechanism and constitutes, all include servo motor, gear and rack, servo motor is fixed on the bottom plate upper end of corresponding side holds and clamps, its output shaft passes through axle hole on bottom plate and is fixed with the gear setting below bottom plate, gear and rack mesh with fixed on bottom disc. The device can realize the quick positioning installation and fixed of conical cylinder or polygonal cone cylinder workpiece.

Description

Technical Field

[0001] This utility model belongs to the technical field of dual-axis positioners, and particularly relates to a workpiece clamping device for positioners. Background Technology

[0002] Currently, dual-axis positioners are widely used in automated welding production lines, automated grinding, automated gluing, and robotic processing systems. Dual-axis positioners can automatically adjust the dual-axis angles of a workpiece according to a preset program, achieving precise coordination with robots, thereby improving production efficiency and product quality, and meeting the needs of automated production.

[0003] A dual-axis positioner includes two axial movements: a pitch axis and an azimuth axis. A connecting frame is set between the pitch axis and the azimuth axis. A workpiece mounting table is set at the output end of the azimuth axis. Screw holes or T-slots are generally arranged on the workpiece mounting table to fix and install the workpiece or workpiece clamp. It is used in conjunction with processing equipment or gluing equipment to complete the grinding or surface gluing of the workpiece.

[0004] For workpieces that are being machined or coated with adhesive and are conical or polygonal, it is difficult to directly fix them to the workpiece mounting table to achieve alignment with the center of the tooling mounting table. In addition, when the axial dimension of the workpiece is large, it is also difficult to maintain its stability on the tooling mounting table. It is necessary to set tooling fixtures on the tooling mounting table to ensure the alignment of the workpiece with the workpiece mounting table and the stability of its fixation on the workpiece mounting table. Utility Model Content

[0005] This utility model addresses the aforementioned technical problems by proposing a workpiece clamping device for rapid alignment and installation of conical or polygonal conical workpieces on a positioner.

[0006] The above-mentioned objective of this utility model is achieved through the following technical solution: A workpiece clamping device for a positioner includes a chassis, a left clamp, a right clamp, and a clamp opening and closing control mechanism. The chassis consists of a central circular section and outward extensions connecting the left and right sides of the circular section. The chassis is fixedly mounted on the workpiece mounting table of the dual-axis positioner, and the center of the chassis coincides with the center of the workpiece mounting table. Positioning pins and screw holes are provided on the central circular section of the chassis. The left and right clamps are symmetrically arranged with the axis of the workpiece mounting table of the dual-axis positioner as the center. Both the left and right clamps consist of a base plate, a vertical plate perpendicularly connected to the base plate, and reinforcing ribs connecting the base plate and the vertical plate. The base plate is connected to the upper end of the chassis via a linear guide rail pair. A vertical guide rail is provided on the inner side of the vertical plate to achieve positioning and engagement with the guide groove on the outer workpiece clamp. The clamp opening and closing control mechanism consists of a left clamp moving drive mechanism and a right clamp moving drive mechanism. The left clamp moving drive mechanism and the right clamp moving drive mechanism adopt the same structural form, both including a servo motor, a gear and a rack. The servo motor is fixedly installed on the upper end of the base plate of the corresponding side clamp. The output shaft of the servo motor is fixedly connected to the gear set below the base plate through the shaft hole on the base plate. The gear meshes with the rack fixed on the chassis.

[0007] Furthermore, the workpiece clamping device also includes a quick-pressing mechanism at the bottom of the workpiece external clamp; the quick-pressing mechanism at the bottom of the workpiece external clamp consists of four sets, which are installed on the chassis at the four corners between the left clamp and the right clamp, and the two sets of quick-pressing mechanisms at the bottom of the workpiece external clamp on the left and the two sets of quick-pressing mechanisms at the bottom of the workpiece external clamp on the right are symmetrically arranged.

[0008] Furthermore, each set of workpiece external clamping bottom quick clamping mechanisms includes a clamping seat, a clamping arm, a clamping screw, and an operating arm. The lower end of the clamping seat is fixedly connected to the chassis, and a first hinge hole is provided in the middle of the clamping seat. A second hinge hole is provided in the upper part of the clamping seat, and the second hinge hole is offset outward relative to the first hinge hole. The upper part of the operating arm is the force-applying part, and a third hinge hole and a fourth hinge hole are provided along the upper and lower edges of the lower part of the operating arm, respectively. One end of the clamping arm is provided with a screw mounting hole, the middle part of the clamping arm is provided with a fifth hinge hole, and the other end of the clamping arm is provided with a sixth hinge hole. The first hinge hole and the fourth hinge hole are hinged together by a pin, the second hinge hole and the sixth hinge hole are hinged together by a pin, and the third hinge hole and the fifth hinge hole are connected by a pin. The clamping screw is fixedly connected to the screw mounting hole on the clamping arm with the screw head facing downward, and is connected to the upper and lower parts with locking nuts.

[0009] The advantages and positive effects of this utility model are as follows: 1. This utility model is equipped with a two-sided clamping structure with vertical guide rails to guide and position the external clamping fixture for conical or polygonal conical workpieces. This facilitates quick alignment of the workpiece center with the workpiece mounting table center of the dual-axis positioner. Positioning pins and threaded holes are provided on the chassis to achieve positioning and fixed connection with the base of the external clamping fixture, thereby fixing the workpiece.

[0010] 2. The clamp opening and closing control mechanism of this utility model adopts a gear and rack meshing transmission mechanism driven by a servo motor, which has the advantage of convenient control and realizes the positioning and installation of various sizes of conical or polygonal conical workpieces within a certain size range.

[0011] 3. This utility model adopts a four-set workpiece external clamp bottom quick clamping mechanism to temporarily clamp and fix the bottom of the workpiece external clamp during the workpiece installation process, which facilitates the fixed connection between the workpiece external clamp base and the chassis. Attached Figure Description

[0012] Figure 1 This is a front view of the present invention; Figure 2 yes Figure 1 A magnified view of part A; Figure 3 This is a top view of the present invention; Figure 4 This is the left view of this utility model. Detailed Implementation

[0013] The structure of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0014] Please refer to the following for a workpiece clamping device used on a positioner. Figures 1-4 The invention features a chassis 1, a left-side clamp 4, a right-side clamp 6, a clamp opening and closing control mechanism, and a quick-pressing mechanism 5 at the bottom of the workpiece external clamp.

[0015] The chassis consists of a central circular section and outward extensions connecting the left and right sides of the circular section. The chassis is fixed to the workpiece mounting table of the dual-axis positioner with screws, and the center of the chassis coincides with the center of the workpiece mounting table. Positioning pins and screw holes are provided on the central circular section of the chassis for positioning and fixing with the external workpiece clamp. The left and right clamps are symmetrically arranged about the axis of the workpiece mounting table of the dual-axis positioner. Both the left and right clamps consist of a base plate, a vertical plate connected perpendicularly to the base plate, and reinforcing ribs connecting the base plate and the vertical plate. The base plate is connected to the upper end of the chassis via a linear guide rail pair 7. A vertical guide rail is provided on the inner side of the vertical plate for positioning with the external workpiece clamp; the cross-section of the vertical guide rail can be an isosceles trapezoid or a semicircle, etc. In this invention, two guide rails are provided on the vertical plates of both the left and right clamps. The guide rail is used to cooperate with the guide grooves set on both sides of the workpiece outer clamp. According to the change of the cross-sectional size of the workpiece, the workpiece outer clamp adopts a structure with multiple retaining rings set at the top and bottom. The lowest retaining ring forms a retaining seat. The retaining seat is provided with pin holes and screw holes for positioning and cooperation with the chassis and fixed connection by screws.

[0016] The clamp opening and closing control mechanism is used to adjust and control the space between the left and right clamps to achieve the fixed installation of cylindrical workpieces of various sizes within a certain size range. From the perspective of convenient structural layout, the clamp opening and closing control mechanism consists of a left clamp moving drive mechanism and a right clamp moving drive mechanism. Both the left and right clamp moving drive mechanisms adopt the same structural form, each including a servo motor 3, a gear 2, and a rack 8. The servo motor is fixedly mounted on the upper end of the base plate of the corresponding side clamp. The output shaft of the servo motor is fixedly connected to the gear located below the base plate through a shaft hole on the base plate. The gear meshes with the rack fixed on the chassis.

[0017] The aforementioned clamp opening and closing control mechanism enables the left and right clamps to move in opposite directions, thus making it suitable for clamping and fixing products of different dimensions.

[0018] The quick-clamping mechanism at the bottom of the workpiece outer clamp is used to quickly clamp the bottom of the workpiece outer clamp during workpiece installation. After clamping, the bottom of the workpiece outer clamp is then fixedly connected to the chassis with screws. In this invention, four sets of the quick-clamping mechanism at the bottom of the workpiece outer clamp are preferably used. The four sets of the quick-clamping mechanism at the bottom of the workpiece outer clamp are positioned as follows: they are installed at the four corners of the chassis between the left and right clamps, with the two sets on the left and the two sets on the right arranged symmetrically.

[0019] The specific structure of the quick-clamping mechanism at the bottom of each set of workpiece external clamps is as follows: Each set of quick-clamping mechanisms includes a clamping seat 5.4, a clamping arm 5.2, a clamping screw 5.1, and an operating arm 5.3. The lower end of the clamping seat is fixedly connected to the chassis. A first hinge hole is provided in the middle of the clamping seat, and a second hinge hole is provided in the upper part of the clamping seat. The second hinge hole is offset outward relative to the first hinge hole. The upper part of the operating arm is the force-applying part, and a third hinge hole and a fourth hinge hole are respectively provided along the upper and lower edges of the lower part of the operating arm. One end of the clamping arm is provided with a screw mounting hole, the middle part of the clamping arm is provided with a fifth hinge hole, and the other end of the clamping arm is provided with a sixth hinge hole. The first hinge hole and the fourth hinge hole are hinged together by a pin, the second hinge hole and the sixth hinge hole are hinged together by a pin, and the third hinge hole and the fifth hinge hole are connected by a pin. The clamping screw is fixedly connected to the screw mounting hole on the clamping arm with the screw head facing downwards, and is connected to the upper and lower parts by locking nuts.

[0020] This workpiece external clamping mechanism employs a quick-clamping mechanism at the bottom. When the force-applying part of the operating arm rotates to the upper vertical position, the clamping screw is vertically positioned, clamping and fixing the bottom of the workpiece's external clamping mechanism through its screw head. When the force-applying part of the operating arm rotates clockwise by a certain angle, the clamping screw lifts, releasing the clamping and fixing of the workpiece's external clamping mechanism at the bottom, facilitating the fixing and removal of the workpiece's external clamping mechanism and the workpiece from the positioner.

[0021] This workpiece clamping device, used on a positioner, adjusts the distance between the two clamps to a suitable level using servo motors on both sides, based on the size of the workpiece external fixture. The assembled workpiece and external fixture are then installed from top to bottom between the two clamps. The workpiece and external fixture are positioned on the dual-axis positioner by the cooperation of guide grooves on the fixtures and guide rails on the clamps. After the base of the external fixture contacts the upper end of the chassis, positioning is further achieved through the cooperation of positioning pins and pin holes. Then, the force-applying parts of the four sets of quick-pressing mechanisms at the bottom of the external fixture are moved upwards, pressing the screw heads of the clamping screws against the upper end of the base of the external fixture. The base of the external fixture is then fixed to the base plate using multiple screws. Once the base of the external fixture is completely fixed to the chassis, the force-applying parts of the four sets of quick-pressing mechanisms at the bottom of the external fixture can be moved outwards clockwise to release the pressure on the base of the external fixture.

[0022] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A workpiece clamping device for a positioner, characterized in that: Includes chassis, left-side clamp, right-side clamp, and clamp opening and closing control mechanism; The chassis consists of a central circular section and outward extensions connecting the left and right sides of the circular section. The chassis is fixedly mounted on the workpiece mounting table of the dual-axis positioner, and the center of the chassis coincides with the center of the workpiece mounting table. Positioning pins and screw holes are provided on the central circular section of the chassis. The left and right clamps are symmetrically arranged with the axis of the workpiece mounting table of the dual-axis positioner as the center. Both the left and right clamps consist of a base plate, a vertical plate perpendicularly connected to the base plate, and reinforcing ribs connecting the base plate and the vertical plate. The base plate is connected to the upper end of the chassis via a linear guide rail pair. A vertical guide rail is provided on the inner side of the vertical plate to achieve positioning and engagement with the guide groove on the outer workpiece clamp. The clamp opening and closing control mechanism consists of a left clamp moving drive mechanism and a right clamp moving drive mechanism. The left clamp moving drive mechanism and the right clamp moving drive mechanism adopt the same structural form, both including a servo motor, a gear and a rack. The servo motor is fixedly installed on the upper end of the base plate of the corresponding side clamp. The output shaft of the servo motor is fixedly connected to the gear set below the base plate through the shaft hole on the base plate. The gear meshes with the rack fixed on the chassis.

2. The workpiece clamping device for a positioner according to claim 1, characterized in that: The workpiece clamping device also includes a quick-pressing mechanism at the bottom of the workpiece external clamp; the quick-pressing mechanism at the bottom of the workpiece external clamp consists of four sets, which are installed on the chassis at the four corners between the left clamp and the right clamp, and the two sets of quick-pressing mechanisms at the bottom of the workpiece external clamp on the left and the two sets of quick-pressing mechanisms at the bottom of the workpiece external clamp on the right are symmetrically arranged.

3. The workpiece clamping device for a positioner according to claim 2, characterized in that: Each set of workpiece external clamping bottom quick clamping mechanisms includes a clamping seat, a clamping arm, a clamping screw, and an operating arm. The lower end of the clamping seat is fixedly connected to the chassis. A first hinge hole is provided in the middle of the clamping seat, and a second hinge hole is provided in the upper part of the clamping seat. The second hinge hole is offset outward relative to the first hinge hole. The upper part of the operating arm is the force-applying part, and a third hinge hole and a fourth hinge hole are provided along the upper and lower edges of the lower part of the operating arm, respectively. One end of the clamping arm is provided with a screw mounting hole, the middle part of the clamping arm is provided with a fifth hinge hole, and the other end of the clamping arm is provided with a sixth hinge hole. The first hinge hole and the fourth hinge hole are hinged together by a pin, the second hinge hole and the sixth hinge hole are hinged together by a pin, and the third hinge hole and the fifth hinge hole are connected by a pin. The clamping screw is fixedly connected to the screw mounting hole on the clamping arm with the screw head facing downward, and is connected to the upper and lower parts with locking nuts.

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