Modular positioning fixture for a hand plate assembly line

Abstract

The utility model discloses a modularization positioning fixture of hand plate assembly line relates to hand plate assembly auxiliary equipment technical field, including positioning table, the upper end of positioning table is equipped with two sets of positioning slot, four groups of horizontal positioning column are installed in the inside of two sets of positioning slot, two sets of longitudinal positioning column are installed in the inside of two sets of positioning slot, the both sides of positioning table are all installed with detachable special-shaped frame board, the upper end of positioning table and the side of longitudinal positioning column side are all installed with four groups of guide hole, and the guide hole is aligned with longitudinal positioning column. The utility model, horizontal positioning column and longitudinal positioning column form the right angle datum plane, cooperate adjustable limit block and clamping plate, can realize the accurate positioning of different size workpieces, and the positioning column of modularization design can replace different height specifications according to workpiece demand, and adapts diversified processing scene.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment for prototype assembly, and in particular to a modular positioning fixture for a prototype assembly line. Background Technology

[0002] In the prototype assembly process of manufacturing, positioning fixtures are key equipment to ensure assembly accuracy and efficiency. Traditional prototype positioning fixtures are mostly integrated structures designed for specific prototype products, with fixed positioning, clamping, and support structures, making them unable to be adjusted for prototypes of different shapes and sizes. When different types of prototypes need to be assembled, special fixtures must be redesigned and manufactured, which not only increases production costs but also extends product development and production cycles.

[0003] However, in the existing technology, the positioning accuracy of traditional fixtures is easily affected by the overall structural processing error. Moreover, if a certain part of the structure is damaged during maintenance, the entire fixture often needs to be replaced, resulting in high maintenance costs. In addition, the clamping and positioning operations of some traditional fixtures are cumbersome, requiring operators to have a high level of proficiency, which increases the intensity of manual labor and makes it difficult to meet the efficient and flexible production needs of modern prototype assembly lines. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art and to propose a modular positioning fixture for a prototype assembly line.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a modular positioning fixture for a prototype assembly line, comprising a positioning platform, two sets of positioning grooves at the upper end of the positioning platform, four sets of transverse positioning columns installed inside each of the two sets of positioning grooves, two sets of longitudinal positioning columns installed inside each of the two sets of positioning grooves, detachable irregular-shaped frame plates installed on both sides of the positioning platform, four sets of guide holes penetrating through the upper end of the positioning platform and on one side of the longitudinal positioning columns, the guide holes being aligned with the longitudinal positioning columns, two sets of elongated holes penetrating through the upper end of the positioning platform and on one side of the transverse positioning columns, limit blocks being provided inside each of the four sets of guide holes, clamping plates being provided inside each of the two sets of elongated holes, second cylinders being installed on the inner walls of each of the two sets of irregular-shaped frame plates, two sets of detachable mounting protrusions being installed at the top of the inner interior of the positioning platform, and two sets of telescopic rods being installed on the inner walls of each of the two sets of mounting protrusions.

[0006] Preferably, a connecting plate is installed at one end of every two sets of limiting blocks, and the protruding ends of every two sets of telescopic rods are fixed to one end of a connecting plate.

[0007] Preferably, two sets of guide rods are installed inside the two sets of elongated holes, and two sets of vertical grooves are opened at the upper end of the two sets of clamping plates.

[0008] Preferably, a portion of each of the four sets of guide rods is disposed inside the four sets of vertical slots, and the extended ends of the two sets of second cylinders are respectively fixed to one end of the two sets of clamping plates.

[0009] Preferably, two sets of lower pressure plates are provided above each of the two sets of positioning grooves, and four sets of detachable convex seats are installed on the rear side of the positioning platform. A first cylinder is installed at the lower end of each of the four sets of convex seats, and connecting parts are rotatably installed on both sides of each set of lower pressure plates.

[0010] Preferably, one end of each pair of connecting members is rotatably mounted on both ends of the convex seat, and a fixing member is rotatably mounted inside each of the four sets of lower pressure plates. The extended ends of the four sets of first cylinders are respectively fixed to the upper ends of the four sets of fixing members.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the transverse positioning column and the longitudinal positioning column form a right-angled reference plane. With the help of adjustable limit blocks and clamping plates, it can achieve precise positioning of workpieces of different sizes. The modularly designed positioning column can be replaced with different height specifications according to the workpiece requirements to adapt to diverse processing scenarios.

[0012] 2. In this utility model, by adopting a composite clamping method of "transverse cylinder drive and longitudinal pneumatic extension", the output force of the second cylinder can be adjusted by air pressure, and the rubber pad prevents the workpiece from slipping; the lower pressure plate achieves stable pressing through the parallelogram mechanism, and the silicone pad buffers the pressure impact to prevent the thin-walled workpiece from deforming.

[0013] 3. In this utility model, the irregular frame plate, convex seat and other components are designed to be detachable, which is convenient for later maintenance and replacement; the guide hole and the inside of the elongated hole are chrome plated to reduce the sliding wear of the limit block and the clamping plate. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a modular positioning fixture for a prototype assembly line is provided for this utility model. Figure 2 A side view of a modular positioning fixture for a prototype assembly line is provided for this utility model; Figure 3 This utility model provides a structural diagram of an irregularly shaped frame plate, a first cylinder, and a clamping plate for a modular positioning fixture in a prototype assembly line. Figure 4 This utility model presents a structural diagram of the mounting protrusion, limiting block, and telescopic rod of a modular positioning fixture for a hand-made assembly line.

[0015] Legend: 1. Positioning platform; 2. Positioning groove; 3. Horizontal positioning column; 4. Longitudinal positioning column; 5. Irregularly shaped frame plate; 6. Mounting convex plate; 7. Lower pressure plate; 8. Guide hole; 9. Elongated hole; 10. Convex seat; 11. First cylinder; 12. Connecting piece; 13. Limiting block; 14. Second cylinder; 15. Clamping plate; 16. Guide rod; 17. Vertical groove; 18. Telescopic rod; 19. Connecting plate. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Example 1: As Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model provides a modular positioning fixture for a prototype assembly line, including a positioning platform 1. The upper end of the positioning platform 1 has two sets of positioning grooves 2, each containing four sets of transverse positioning posts 3. Each set of positioning grooves 2 also contains two sets of longitudinal positioning posts 4. Detachable irregular-shaped support plates 5 are installed on both sides of the positioning platform 1. Four sets of guide holes 8 are provided through the upper end of the positioning platform 1, located to one side of the longitudinal positioning posts 4, and are aligned with the longitudinal positioning posts 4. Two sets of elongated holes 9 are provided through the upper end of the positioning platform 1, located to one side of the transverse positioning posts 3. Limit blocks 13 are provided inside each of the four sets of guide holes 8, and the elongated holes 9 are... The system is equipped with clamping plates 15, and two sets of irregularly shaped frame plates 5 are each equipped with a second cylinder 14 on their inner walls. The top of the positioning platform 1 is equipped with two sets of detachable mounting protrusions 6. The inner walls of the two sets of mounting protrusions 6 are each equipped with two sets of telescopic rods 18. A connecting plate 19 is installed at one end of each pair of limiting blocks 13. The protruding ends of each pair of telescopic rods 18 are fixed to one end of a connecting plate 19. Two sets of guide rods 16 are installed inside the two sets of elongated holes 9. Two sets of vertical grooves 17 are opened at the top of the two sets of clamping plates 15. A portion of each of the four sets of guide rods 16 is respectively located inside the four sets of vertical grooves 17. The protruding ends of the two sets of second cylinders 14 are respectively fixed to one end of each of the two sets of clamping plates 15.

[0019] The specific settings and functions of this embodiment are described below. The positioning table 1 is made of HT300 gray cast iron and the surface is subjected to aging treatment to eliminate internal stress. Two sets of positioning grooves 2 are opened in parallel on the upper end face to support the workpiece to be processed and limit the lateral displacement. Lateral positioning components: Four sets of lateral positioning posts 3 are installed inside each positioning groove 2 along the length direction and are fixed to the bottom surface of the positioning groove 2 by internal hex bolts. The top corners are rounded to avoid scratching the workpiece. The upper end of the positioning table 1 is provided with two sets of elongated holes 9 on one side of the transverse positioning column 3. Two sets of clamping plates 15 are installed inside. Acrylic rubber pads (Shore hardness 60°) are pasted on the inner side of the clamping plates 15 to enhance the friction. Two sets of guide rods 16 are fixed inside the elongated hole 9, and two sets of vertical grooves 17 are correspondingly opened on the upper end of the clamping plate 15. The guide rods 16 and the vertical grooves 17 are fitted together to achieve sliding guidance. Longitudinal positioning components: Two sets of longitudinal positioning columns 4 (with the same specifications as the transverse positioning columns 3) are installed inside each positioning groove 2 along the width direction, symmetrically distributed on both sides of the positioning groove 2 to form a longitudinal reference plane; Four sets of guide holes 8 are opened through the upper end of the positioning table 1 corresponding to the longitudinal positioning column 4, and a limiting block 13 is set inside. The inner end of the limiting block 13 is beveled at 30° to facilitate the introduction of the workpiece. Two sets of mounting convex plates 6 are fixed to the top of the inner end of the positioning platform 1 by countersunk bolts. Two sets of telescopic rods 18 are installed on the inner wall of the convex plates. The outer ends of each pair of limit blocks 13 are connected by a connecting plate 19. The extended ends of the telescopic rods 18 are rigidly connected to the connecting plate 19. Lateral drive mechanism: The positioning table 1 has detachable irregular-shaped frame plates 5 installed on both sides by T-bolts. The second cylinder 14 is vertically installed on the inner wall of the frame plate. The extended end of the cylinder is connected to the outer end of the clamping plate 15 through a floating joint to realize the lateral clamping action.

[0020] Example 2: Figure 1 and Figure 2 As shown, two sets of lower pressure plates 7 are provided above the two sets of positioning grooves 2. Four sets of detachable convex seats 10 are installed on the rear side of the positioning platform 1. A first cylinder 11 is installed at the lower end of each of the four sets of convex seats 10. Connectors 12 are rotatably installed on both sides of each set of lower pressure plates 7. One end of each pair of connectors 12 is rotatably installed at both ends of the convex seat 10. Fixing components are rotatably installed inside the four sets of lower pressure plates 7. The extended ends of the four sets of first cylinders 11 are fixed to the upper ends of the four sets of fixing components.

[0021] The overall effect of this embodiment is as follows: Vertical pressing mechanism: Two sets of lower pressure plates 7 are symmetrically arranged above each set of positioning grooves 2, and silicone pads (Shore hardness 50°) are pasted on the lower end of the lower pressure plates 7 to prevent workpiece damage; Drive mechanism: Four sets of detachable convex seats 10 (made of cast iron) are fixed to the rear side of the positioning table 1 by bolts, and the first cylinder 11 is vertically installed at the lower end of the convex seat 10; Transmission structure: Connecting parts 12 are rotatably installed on both sides of each lower pressure plate 7 via pins. The other end of the connecting part 12 is rotatably connected to both ends of the convex seat 10 to form a parallelogram structure. A fixing part (U-shaped groove structure) is rotatably installed in the middle of the lower pressure plate 7. The extended end of the first cylinder 11 is connected to the fixing part through a fisheye connector to realize the smooth lifting and lowering of the lower pressure plate 7.

[0022] The usage and working principle of this device: Initial placement of the workpiece: Place the workpiece to be processed into the positioning groove 2. The edge of the workpiece is initially in contact with the transverse positioning column 3 and the longitudinal positioning column 4. The right-angled reference surface formed by the positioning column is used to complete the pre-positioning and ensure that the initial posture of the workpiece is consistent. Longitudinal limit adjustment: Start the telescopic rod 18, and drive the four sets of limit blocks 13 to move synchronously along the guide hole 8 through the connecting plate 19 until the inner end of the limit block 13 is in close contact with the side of the workpiece. The pneumatic drive of the telescopic rod 18 can adjust the contact force through air pressure, which can ensure positioning accuracy and avoid workpiece deformation under pressure. Lateral clamping and fixing: The second cylinder 14 extends with air and pushes the clamping plate 15 to slide along the guide rod 16 in the long hole 9 (the vertical groove 17 cooperates with the guide rod 16 to ensure smooth movement), so that the rubber pad on the inner side of the clamping plate 15 is tightly attached to the other side of the workpiece, and forms a rigid fixation in the horizontal direction with the longitudinal limiting block 13 to prevent the workpiece from shifting laterally during processing. Vertical clamping operation: The first cylinder 11 extends with air and drives the lower pressure plate 7 to rotate around the connector 12 through the fixing part until the silicone pad at the lower end of the lower pressure plate 7 contacts the upper surface of the workpiece and applies a preset pressure to complete the vertical fixation and prevent the workpiece from warping or vibrating during processing. Machining and Reset: After the workpiece is fixed, the positioning table 1 remains stable and works with the external machining equipment. After machining, each cylinder and telescopic rod 18 moves in sequence in the order of "vertical release → horizontal release → longitudinal reset" to facilitate the removal of the workpiece and complete one positioning cycle.

[0023] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A modular positioning fixture for a prototype assembly line, comprising a positioning table (1), characterized in that: The upper end of the positioning platform (1) is provided with two sets of positioning grooves (2), and four sets of transverse positioning columns (3) are installed inside each of the two sets of positioning grooves (2). Two sets of longitudinal positioning columns (4) are installed inside each of the two sets of positioning grooves (2). Detachable irregular-shaped frame plates (5) are installed on both sides of the positioning platform (1). Four sets of guide holes (8) are provided through the upper end of the positioning platform (1) and on one side of the longitudinal positioning column (4). The guide holes (8) are aligned with the longitudinal positioning column (4). Two sets of elongated holes (9) are provided at the upper end of the platform (1) and on one side of the transverse positioning column (3). Limiting blocks (13) are provided inside the four sets of guide holes (8). Clamping plates (15) are provided inside the two sets of elongated holes (9). Second cylinders (14) are installed on the inner walls of the two sets of irregular frame plates (5). Two sets of detachable mounting protrusions (6) are installed at the top of the inner side of the positioning platform (1). Two sets of telescopic rods (18) are installed on the inner walls of the two sets of mounting protrusions (6).

2. The modular positioning fixture for a prototype assembly line according to claim 1, characterized in that: A set of connecting plates (19) is installed at one end of each pair of limiting blocks (13), and the extended ends of each pair of telescopic rods (18) are fixed to one end of a set of connecting plates (19).

3. A modular positioning fixture for a prototype assembly line according to claim 2, characterized in that: Two sets of guide rods (16) are installed inside the two sets of elongated holes (9), and two sets of vertical grooves (17) are opened at the upper end of the two sets of clamping plates (15).

4. A modular positioning fixture for a prototype assembly line according to claim 3, characterized in that: A portion of each of the four sets of guide rods (16) is respectively disposed inside the four sets of vertical grooves (17), and the extended ends of the two sets of second cylinders (14) are respectively fixed to one end of the two sets of clamping plates (15).

5. A modular positioning fixture for a prototype assembly line according to claim 1, characterized in that: Two sets of lower pressure plates (7) are provided above the two sets of positioning grooves (2). Four sets of detachable convex seats (10) are installed on the rear side of the positioning platform (1). A first cylinder (11) is installed at the lower end of each of the four sets of convex seats (10). Connecting parts (12) are rotatably installed on both sides of each set of lower pressure plates (7).

6. A modular positioning fixture for a prototype assembly line according to claim 5, characterized in that: One end of each pair of connecting parts (12) is rotatably mounted on both ends of the convex seat (10). The interior of each of the four sets of lower pressure plates (7) is rotatably mounted with a fixing part. The extended ends of the four sets of first cylinders (11) are respectively fixed to the upper ends of the four sets of fixing parts.

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