Movable inner positioning mechanism

Abstract

A movable inner positioning mechanism comprises a material pressing core, a flanging block, a lower forming block, an inner positioning block and an ejector pin, and the material pressing core and the flanging block are arranged below an upper die base. The lower forming block is fixed to the top of the lower die base. The inner positioning block is movably arranged in the lower forming block; the lifting pin is movably arranged in the lower forming block; a first spring is arranged below the inner positioning block in the lower forming block, the inner positioning block can be driven to move upwards through the elastic force of the first spring, a second spring is arranged below the ejector pin in the lower forming block, the ejector pin can be driven to move upwards through the elastic force of the second spring, and the inner positioning block can accurately position a workpiece. And the inner positioning block can jack up the workpiece together with the lifting pin. The inner positioning block can accurately position a workpiece, the inner positioning block can jack up the workpiece under the action of the first spring, and the workpiece can be accurately positioned when the workpiece is jacked up.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a movable internal positioning mechanism. Background Technology

[0002] In recent years, with increasingly fierce competition in the automotive market, major automakers have focused their research and development on the vehicle's body panels and related stamped parts, also known as molded components, demanding higher and higher specifications. These components are becoming more complex and require greater strength, posing a significant technical challenge to mold manufacturers. Process engineers design and layout the process steps based on these characteristics, creating process documents for the component and determining the mold size and number of steps for its production. For some components undergoing full-circumference flanging, ejector pins are typically used for material removal. However, for components with high positioning requirements, inaccurate internal positioning can occur.

[0003] Existing internal positioning mechanisms use ejector pins to remove material during the full-circumference flanging process of some parts. However, this removal method has low positioning accuracy and is not suitable for parts that require high positioning accuracy.

[0004] Therefore, we propose an in-activity positioning mechanism. Utility Model Content

[0005] In view of the shortcomings of the existing production technology, the applicant provides an active internal positioning mechanism, in which the internal positioning block can accurately position the workpiece, and the internal positioning block can also lift the workpiece under the action of the first spring, and can also accurately position the workpiece when lifting it.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An internal positioning mechanism is used in a mold, the mold including an upper mold base and a lower mold base, the internal positioning mechanism including:

[0008] The blank holder and the flange block are located below the upper mold base;

[0009] The lower forming block is fixed to the top of the lower mold base;

[0010] At least two inner positioning blocks are actively positioned within the lower forming block;

[0011] The top pin is movable within the lower forming block;

[0012] The lower forming block has a first spring located below the inner positioning block. The spring force of the first spring can drive the inner positioning block to move upward. The lower forming block has a second spring located below the top pin. The spring force of the second spring can drive the top pin to move upward. The inner positioning block can accurately position the workpiece, and the inner positioning block and the top pin can lift the workpiece together.

[0013] Its further features are:

[0014] The bottom of the inner positioning block is provided with a first limiting block, the bottom of the top pin is provided with a second limiting block, and the lower forming block is provided with a first step hole and a second step hole.

[0015] The inner positioning block is movably disposed in the first step hole, and the first limiting block is restricted by the step in the first step hole.

[0016] The top pin is movably disposed in the second step hole, and the second limiting block is limited by the step in the second step hole.

[0017] The first spring is disposed in the first stepped hole and is located below the first limiting block; the second spring is disposed in the second stepped hole and is located below the second limiting block.

[0018] A first screw plug is provided at the bottom of the first spring in the first stepped hole, and a second screw plug is provided at the bottom of the second spring in the second stepped hole.

[0019] It also includes an upper pad plate, which is fixed to the bottom of the upper mold base. An upper clamping plate is fixed to the bottom of the upper pad plate. A squatting block is fixed to the bottom of the upper pad plate in the upper clamping plate. The pressing core is fixed to the bottom of the squatting block, and the flange block is fixed to the bottom of the upper clamping plate.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model has a compact and reasonable structure and is easy to operate. The inner positioning block can accurately position the workpiece. The inner positioning block can also lift the workpiece under the action of the first spring. When lifting the workpiece, it can also accurately position the workpiece. This can reduce the mold space, improve the full-circumference flanging accuracy, reduce the mold cost, optimize the mold structure, and facilitate the design by designers and the assembly by fitters.

[0022] In addition, this utility model also has the following advantages:

[0023] (1) The process includes four stages. In the first stage, the upper die base is at its highest position, the lower die base is fixed on the worktable of the punch press, the workpiece is placed on the lower forming block, and the workpiece is positioned by the inner positioning block. When the punch press is working, the punch press drives the upper die base to move downward, and the upper die base drives the pressure core and the flanging block to move downward until the pressure core contacts the workpiece. In the second stage, the upper die base continues to move downward, and the inner positioning block and the ejector pin move downward under the action of the pressure core until the workpiece contacts the lower forming block. In the third stage, the upper die base continues to move downward until the upper die base moves to the lowest position, and the flanging block completes the flanging work. In the fourth stage, the upper die base moves upward, driving the pressure core and the flanging block to move upward. The inner positioning block moves upward under the action of the first spring, and the ejector pin moves upward under the action of the second spring. The ejector pin and the inner positioning block together lift the workpiece upward, and the upper die base moves to the highest position, completing the full circumference flanging process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0026] Figure 3 This is a schematic diagram of the lower forming block, inner positioning block, and top pin of this utility model.

[0027] Figure 4 for Figure 3 Top view.

[0028] Figure 5 for Figure 4 Schematic diagram of the AA section.

[0029] Figure 6 for Figure 4 Schematic diagram of the cross-section of BB.

[0030] Figure 7 for Figure 5 Schematic diagram after removing the inner positioning block and top pin.

[0031] Figure 8 for Figure 6 Schematic diagram after removing the inner positioning block and top pin.

[0032] Wherein: 100, upper mold base; 200, lower mold base; 300, upper pad; 400, upper clamping plate; 500, squatting block; 600, pressure core; 700, flange block; 800, inner positioning block; 810, first limiting block; 900, first spring; 1000, second spring; 1100, ejector pin; 1110, second limiting block; 1200, lower forming block; 1210, first step hole; 1220, second step hole; 1300, part. Detailed Implementation

[0033] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0034] like Figures 1-8 As shown, an active internal positioning mechanism is disposed in a mold. The mold includes an upper mold base 100 and a lower mold base 200. The active internal positioning mechanism includes an upper pad 300, an upper clamping plate 400, a squatting block 500, a pressing core 600, a flange block 700, an internal positioning block 800, a first spring 900, a second spring 1000, an ejector pin 1100, and a lower forming block 1200.

[0035] The upper mold base 100 is located above the lower mold base 200.

[0036] The lower forming block 1200 is positioned on the top of the lower mold base 200, and the lower forming block 1200 is provided with a movable inner positioning block 800 and an ejector pin 1100.

[0037] In one embodiment, at least two inner positioning blocks 800 are provided.

[0038] In one embodiment, the lower molding block 1200 is fixedly connected to the lower mold base 200 by screws.

[0039] The bottom of the inner positioning block 800 is provided with a first limiting block 810, the bottom of the top pin 1100 is provided with a second limiting block 1110, and the lower forming block 1200 is provided with a first step hole 1210 and a second step hole 1220.

[0040] The inner positioning block 800 is movably disposed in the first step hole 1210, and the first limiting block 810 is restricted by the step in the first step hole 1210. The top pin 1100 is movably disposed in the second step hole 1220, and the second limiting block 1110 is restricted by the step in the second step hole 1220.

[0041] When the first limiting block 810 is limited by the step of the first stepped hole 1210, the inner positioning block 800 is at its highest position, and the top of the inner positioning block 800 passes through the first stepped hole 1210. The workpiece 1300 can be positioned through the inner positioning block 800.

[0042] When the second limiting block 1110 is limited by the step of the second step hole 1220, the ejector pin 1100 is at its highest position, and the top of the ejector pin 1100 passes through the second step hole 1220, through which the workpiece 1300 can be ejected.

[0043] A first spring 900 is provided in the first stepped hole 1210 below the first limiting block 810, and a second spring 1000 is provided in the second stepped hole 1220 below the second limiting block 1110.

[0044] In one embodiment, a first screw plug is provided in the first stepped hole 1210 at the bottom of the first spring 900, and a second screw plug is provided in the second stepped hole 1220 at the bottom of the second spring 1000.

[0045] The upper pad 300 is fixed to the bottom of the upper mold base 100. The upper clamping plate 400 is fixed to the bottom of the upper pad 300. The squatting block 500 is fixed to the bottom of the upper pad 300 in the upper clamping plate 400. The pressing core 600 is fixed to the bottom of the squatting block 500. The flange block 700 is provided on the outside of the pressing core 600 at the bottom of the upper clamping plate 400.

[0046] The process includes four stages. In the first stage, the upper die holder 100 is at its highest point, the lower die holder 200 is fixed on the worktable of the punch press, and the workpiece 1300 is placed on the lower forming block 1200. The workpiece 1300 is positioned by the inner positioning block 800. When the punch press is working, the punch press drives the upper die holder 100 to move downward. The upper die holder 100 drives the pressure core 600 and the flanging block 700 to move downward until the pressure core 600 contacts the workpiece 1300.

[0047] In the second stage, the upper mold base 100 continues to move downward, and the inner positioning block 800 and the ejector pin 1100 move downward under the action of the pressure core 600 until the part 1300 contacts the lower forming block 1200.

[0048] In the third stage, the upper mold base 100 continues to move downward until it reaches its lowest point, at which point the flanging block 700 completes the flanging operation.

[0049] In the fourth stage, the upper mold base 100 moves upward, driving the pressure core 600 and the flanging block 700 to move upward. The inner positioning block 800 moves upward under the elastic force of the first spring 900, and the ejector pin 1100 moves upward under the elastic force of the second spring 1000. The ejector pin 1100 and the inner positioning block 800 together lift the workpiece 1300 upward. The upper mold base 100 moves to the highest point, completing the full circumference flanging process.

[0050] The inner positioning block 800 can accurately position the workpiece 1300. The inner positioning block 800 can also lift the workpiece 1300 under the action of the first spring 900. When lifting the workpiece 1300, it can also accurately position the workpiece 1300. This can reduce the mold space, improve the full-circumference flanging accuracy, reduce the mold cost, optimize the mold structure, and facilitate the design by designers and the assembly by fitters.

[0051] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A movable internal positioning mechanism for use in a mold, the mold comprising an upper mold base (100) and a lower mold base (200), characterized in that, The location services within the event include: The pressure core (600) and the flange block (700) are located below the upper mold base (100); The lower forming block (1200) is fixed on the top of the lower mold base (200); At least two inner positioning blocks (800) are movably set in the lower forming block (1200); The top pin (1100) is movable in the lower forming block (1200); The lower forming block (1200) has a first spring (900) located below the inner positioning block (800). The spring force of the first spring (900) can drive the inner positioning block (800) to move upward. The lower forming block (1200) has a second spring (1000) located below the top pin (1100). The spring force of the second spring (1000) can drive the top pin (1100) to move upward. The inner positioning block (800) can accurately position the workpiece (1300), and the inner positioning block (800) and the top pin (1100) can lift the workpiece (1300) together.

2. The in-activity positioning mechanism as described in claim 1, characterized in that: The bottom of the inner positioning block (800) is provided with a first limiting block (810), the bottom of the top pin (1100) is provided with a second limiting block (1110), and the lower forming block (1200) is provided with a first step hole (1210) and a second step hole (1220).

3. The in-activity positioning mechanism as described in claim 2, characterized in that: The inner positioning block (800) is movably disposed in the first step hole (1210), and the first limiting block (810) is restricted by the step in the first step hole (1210).

4. The in-activity positioning mechanism as described in claim 2, characterized in that: The top pin (1100) is movably disposed in the second step hole (1220) and limits the second limiting block (1110) through the step in the second step hole (1220).

5. An in-activity positioning mechanism as described in any one of claims 2-4, characterized in that: The first spring (900) is disposed in the first step hole (1210) and is located below the first limiting block (810); the second spring (1000) is disposed in the second step hole (1220) and is located below the second limiting block (1110).

6. The in-activity positioning mechanism as described in claim 2, characterized in that: A first screw plug is provided at the bottom of the first spring (900) in the first stepped hole (1210), and a second screw plug is provided at the bottom of the second spring (1000) in the second stepped hole (1220).

7. The in-activity positioning mechanism as described in claim 1, characterized in that: It also includes an upper pad (300), which is fixed to the bottom of the upper mold base (100). An upper clamping plate (400) is fixed to the bottom of the upper pad (300). A squatting block (500) is fixed to the bottom of the upper pad (300) in the upper clamping plate (400). A pressing core (600) is fixed to the bottom of the squatting block (500), and a flange block (700) is fixed to the bottom of the upper clamping plate (400).

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