Automatic workpiece positioning mechanism of press machine

Abstract

The utility model relates to an automatic workpiece positioning mechanism of a press machine. The automatic workpiece positioning mechanism comprises a mounting table, the first guide seat is longitudinally and horizontally fixed on the surface of the mounting table; the movable frame comprises a cross-shaped frame body, inclined sections are integrally arranged at the two ends of a horizontal section of the frame body, and kidney-shaped grooves are formed in the free ends of the inclined sections; the air cylinder is fixed on the mounting table; the positioning assembly comprises a connecting rod, the free end of the connecting rod is connected through a pin shaft penetrating through the kidney-shaped groove and hinged to the free end of the inclined section, and a positioning claw is integrally arranged at the other end of the connecting rod. In the process that the air cylinder drives the movable frame to move, the two positioning assemblies can adjust the position of a workpiece located on the surface of a press machine workbench, the pressure center of the workpiece is kept consistent with the center of the sliding block, the forming quality of the workpiece is improved, meanwhile, the service life of the press machine is prolonged, and the production efficiency is improved. The device is suitable for industrial production and has very high practicability.

Description

Technical Field

[0001] This utility model belongs to the technical field of press machines, and particularly relates to an automatic workpiece positioning mechanism for a press machine. Background Technology

[0002] A patent entitled "A Press Machine" is disclosed in the existing Chinese patent database, with application number CN202323232302.5 and application date of 2023-11-29. The key technical points of this press machine are: a support unit located at the bottom of the entire press, providing support; an installation unit mounted on the support unit, having installation space; a positioning unit detachably mounted on the installation unit, used to place the workpiece to be processed; a processing unit mounted on the support unit, with its processing end facing the positioning unit, used to process the workpiece; and a drive unit mounted on and connected to the processing unit, providing driving force to the processing unit. This invention features a positioning mechanism that, through the cooperation of a fixed block, a positioning cylinder, and the positioning block, improves positioning accuracy and processing stability, ensuring accurate workpiece positioning during processing without displacement or shaking, and maintaining consistent clamping force and stability throughout the processing.

[0003] During normal operation of a press, if the pressure center of the die does not coincide with the centerline of the press slide, the press will be subjected to eccentric loads during the stamping process. These eccentric loads can cause uneven wear between the slide and the guide rail, thus affecting the press's motion accuracy and stability. Therefore, this paper aims to propose an automatic workpiece positioning mechanism for a press, which facilitates automatic adjustment to ensure the workpiece center and slide center are aligned on the same axis, improving workpiece forming quality and extending the press's service life. Utility Model Content

[0004] The technical problem to be solved by this utility model is how to align the pressure center of the workpiece with the center of the slide block before stamping. In order to solve the above problem, this utility model provides an automatic workpiece positioning mechanism for a press.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] An automatic workpiece positioning mechanism for a press includes:

[0007] Mounting platform: Fixed to the outside of the press;

[0008] First guide seat: longitudinally and horizontally fixed to the surface of the mounting platform;

[0009] Mobile frame: includes a frame body arranged in a cross shape, with inclined sections integrally provided at both ends of the horizontal section of the frame body, and waist-shaped grooves provided at the free ends of the inclined sections, with the length direction of the waist-shaped grooves being consistent with the length direction of the inclined sections, and the mobile frame being slidably connected to the first guide seat;

[0010] Cylinder: It is fixed on the mounting platform, and the free end of the piston rod is connected to the free end of the vertical section of the moving frame;

[0011] Positioning component: includes a connecting rod, the free end of the connecting rod is connected to the free end of the inclined section via a pin that passes through the waist-shaped groove, and the other end of the connecting rod is integrally provided with a positioning claw;

[0012] Second guide seat: fixed to the surface of the mounting platform, set at a 45° angle with the first guide seat, and the connecting rod is slidably connected inside the second guide seat.

[0013] As a preferred embodiment, the mounting platform is arranged in an arrow shape, and the front end of the mounting platform is provided with a recessed step surface to avoid interference between the positioning claw and the mounting platform.

[0014] As a preferred embodiment, the free end of the positioning claw is provided with a limiting groove, the limiting groove is set in an outward expansion shape, the two positioning claws are set at a 90° angle, and the free ends of the two positioning claws are staggered in the height direction.

[0015] As a preferred embodiment, the first guide seat is provided in two sets at intervals in the longitudinal direction.

[0016] As a preferred embodiment, the vertical side of the frame and the side of the connecting rod are both concave, and the inner sides of the first guide seat and the second guide seat are both convex.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: due to the coordinated linkage between the moving frame and the two positioning components, during the movement of the moving frame driven by the cylinder, the two positioning components can adjust the position of the workpiece located on the surface of the press table, so that the pressure center of the workpiece (for symmetrical stamped parts, its pressure center is usually located at the geometric center) is consistent with the center of the slider, which improves the quality of workpiece forming and extends the service life of the press. This device is suitable for industrial production and has strong practicality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a side view of the positioning component in this utility model.

[0020] In the figure: 1 mounting platform, 2 first guide seat, 3 moving frame, 301 frame body, 302 inclined section, 303 waist-shaped groove, 4 cylinder, 5 positioning component, 501 connecting rod, 502 positioning claw, 6 second guide seat, 7 sunken step surface, 8 limiting groove. Detailed Implementation

[0021] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1-2 The image shows an automatic workpiece positioning mechanism for a press, comprising:

[0023] Mounting platform 1: Fixed to the outside of the press;

[0024] First guide seat 2: longitudinally and horizontally fixed to the surface of mounting platform 1;

[0025] The movable frame 3 includes a frame body 301 arranged in a cross shape. Both ends of the horizontal section of the frame body 301 are integrally provided with inclined sections 302. The free end of the inclined section 302 is provided with a waist-shaped groove 303. The length direction of the waist-shaped groove 303 is consistent with the length direction of the inclined section 302. The movable frame 3 is slidably connected to the first guide seat 2.

[0026] Cylinder 4: It is fixed on the mounting platform 1, and the free end of the piston rod is connected to the free end of the vertical section of the movable frame 3;

[0027] Positioning component 5: includes a connecting rod 501, the free end of the connecting rod 501 is connected to the free end of the inclined section 302 via a pin through the waist-shaped groove 303, and the other end of the connecting rod 501 is integrally provided with a positioning claw 502;

[0028] Second guide seat 6: Fixed to the surface of mounting platform 1, set at a 45° angle with first guide seat 2, and connecting rod 501 slidably connected in the second guide seat 6.

[0029] Specifically, the mounting platform 1 is arranged in an arrow shape. The front end of the mounting platform 1 is provided with a recessed step surface 7 to avoid interference between the positioning claw 502 and the mounting platform 1. Since the bottom of the positioning claw 502 is lower than the bottom of the connecting rod 501 and the connecting rod 501 is attached to the surface of the mounting platform 1, the recessed step surface 7 is provided to avoid interference between the positioning claw 502 and the mounting platform 1 during movement.

[0030] Specifically, the free end of the positioning claw 502 has a limiting groove 8, which is arranged in an outwardly expanding shape. The two positioning claws 502 are arranged at a 90° angle, and the free ends of the two positioning claws 502 are staggered in the height direction. The limiting groove 8 is used to limit the position of the workpiece during the movement of the positioning claw 502. The two limiting claws move synchronously toward the workpiece at a 90° angle until the outer peripheral surface of the workpiece abuts against the inner side of the limiting groove 8.

[0031] Specifically, the first guide seat 2 is provided in two sets at intervals in the longitudinal direction. Since the moving frame 3 is relatively long in the longitudinal direction, two sets are provided to ensure its stability during movement.

[0032] Specifically, the vertical side of the frame 301 and the side of the connecting rod 501 are both concave, while the inner sides of the first guide seat 2 and the second guide seat 6 are both convex.

[0033] When this utility model is in operation, the operator places the cylindrical workpiece on the worktable of the press. When placing it manually, the workpiece can only be roughly placed at the pressure center of the press. By controlling the extension of the cylinder 4, the moving frame 3 is driven to move towards the workpiece in the longitudinal horizontal direction. During the movement, since one end of the connecting rod 501 is connected to the free end of the inclined section 302 of the moving frame 3 via a pin shaft, and the moving direction of the connecting rod 501 is restricted by the second guide seat 6, the connecting rod 501 and the positioning claw 502 move towards the workpiece along the second guide seat 6. At this time, one end of the connecting rod 501 moves relative to the inclined section 302 of the moving frame 3 along the direction of the waist-shaped groove 303. The position of the workpiece is adjusted by the limiting groove 8 at the free end of the positioning claw 502, so that the pressure center (i.e., geometric center) of the workpiece is aligned with the center line of the press slide.

[0034] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. An automatic workpiece positioning mechanism for a press, characterized in that: Including Mounting platform (1): Fixed to the outside of the press; First guide seat (2): longitudinally and horizontally fixed to the surface of the mounting platform (1); The movable frame (3) includes a frame body (301) arranged in a cross shape. Both ends of the horizontal section of the frame body (301) are integrally provided with inclined sections (302). The free end of the inclined section (302) is provided with a waist-shaped groove (303). The length direction of the waist-shaped groove (303) is consistent with the length direction of the inclined section (302). The movable frame (3) is slidably connected to the first guide seat (2). Cylinder (4): It is fixed on the mounting platform (1), and the free end of the piston rod is connected to the free end of the vertical section of the moving frame (3); Positioning component (5): includes a connecting rod (501), the free end of the connecting rod (501) is connected to the free end of the inclined section (302) via a pin through the waist-shaped groove (303), and the other end of the connecting rod (501) is integrally provided with a positioning claw (502); Second guide seat (6): Fixed to the surface of the mounting platform (1), set at a 45° angle with the first guide seat (2), and the connecting rod (501) is slidably connected inside the second guide seat (6).

2. A workpiece automatic positioning mechanism of a press machine according to claim 1, characterized in that: The mounting platform (1) is arranged in an arrow shape, and the front end of the mounting platform (1) is provided with a recessed step surface (7) to avoid interference between the positioning claw (502) and the mounting platform (1).

3. A workpiece automatic positioning mechanism for a press machine according to claim 2, characterized in that: The free end of the positioning claw (502) is provided with a limiting groove (8), the limiting groove (8) is arranged in an outward expansion shape, the two positioning claws (502) are arranged at a 90° angle, and the free ends of the two positioning claws (502) are staggered in the height direction.

4. A workpiece automatic positioning mechanism of a press machine according to claim 3, characterized in that: The first guide seat (2) has two sets of seats spaced apart in the longitudinal direction.

5. A workpiece automatic positioning mechanism for a press machine according to any one of claims 1-4, characterized in that: The vertical side of the frame (301) and the side of the connecting rod (501) are both concave, and the inner sides of the first guide seat (2) and the second guide seat (6) are both convex.

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