Depth-adjustable reusable trial-manufactured door inner plate puncturing device

Abstract

The utility model discloses a depth-adjustable reusable trial-manufactured door inner plate puncturing device, which relates to the field of automobile moulds, is embedded in the surface of a mould body, and comprises a puncturing knife, a fixed base plate, an adjusting screw, a limiting nut and a fixed screw, the upper surface of the fixed base plate is provided with a gap matched with the piercing knife in shape and size, and the piercing knife is embedded into the gap in the upper surface of the fixed base plate; a plurality of through holes are formed in the four corners and the center of the fixing base plate, the through holes in the four corners are communicated with gaps where the puncturing knives are embedded, the adjusting screws are inserted into the through holes in the four corners from the upper surface of the fixing base plate, the limiting nuts are inserted into the through holes in the four corners from the lower surface of the fixing base plate, and threads of the adjusting screws are screwed into the limiting nuts. The outer surface of the piercing knife is provided with a plurality of layers of cross grains which are meshed with threads on the surface of the adjusting screw; the fixing screw is inserted into the central through hole from the upper surface of the fixing base plate and fixes the puncturing device and the mold body.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive molds, and more specifically, to a depth-adjustable and reusable trial-production door inner panel piercing device. Background Art

[0002] The main function of the die drawing piercing knife is to complete the piercing of the sheet metal during the drawing process of the workpiece, so as to release the sheet metal constraint and increase the material flow to assist the forming of the part through its specific structure. In the traditional mode, the adjustment of the piercing depth often encounters problems during the trial production of the die. However, the control of the general piercing depth mainly adjusts the piercing depth slightly by not adjusting the piercing depth or adding a different number of gaskets at the bottom. In this mode, the adjustment range of the piercing height is relatively small, and when adjusting the piercing height through gaskets, the gaskets need to be temporarily cut and are easy to lose. At the same time, the repeated switching and utilization between different projects are not considered. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a depth-adjustable and reusable trial-production door inner panel piercing device to improve the efficiency and accuracy of the piercing process.

[0004] The technical solution of the utility model is: a depth-adjustable and reusable trial-production door inner panel piercing device is provided. The piercing device is embedded and installed on the surface of the mold body. The piercing device includes: a piercing knife, a fixed backing plate, an adjustment screw, a limit nut, and a fixing screw;

[0005] The upper surface of the fixed backing plate has a gap matching the shape and size of the piercing knife, and the piercing knife is embedded in the gap on the upper surface of the fixed backing plate;

[0006] A number of through holes are opened at the four corners and the center of the fixed backing plate. The through holes at the four corners are connected to the gap for embedding the piercing knife. The adjustment screw is inserted into the through holes at the four corners from the upper surface of the fixed backing plate, and the limit nut is inserted into the through holes at the four corners from the lower surface of the fixed backing plate. The thread of the adjustment screw is screwed into the limit nut;

[0007] The outer surface of the piercing knife has multiple layers of cross stripes, and the cross stripes engage with the threads on the surface of the adjustment screw;

[0008] The fixing screw is inserted into the through hole at the center from the upper surface of the fixed backing plate, and the fixing screw fixes the piercing device to the mold body.

[0009] In any of the above technical solutions, further, the diameter of the screw part of the adjustment screw is smaller than the minimum diameter of the through holes at the four corners of the fixed backing plate.

[0010] In any of the above technical solutions, further, the surfaces of the through holes at the four corners of the fixed backing plate do not have threads.

[0011] In any of the above technical solutions, further, the piercing knife is of an inward-rolling type, and the piercing end is at the center of the piercing area.

[0012] The beneficial effects of the present utility model are as follows:

[0013] In the technical solution of the present utility model, by adjusting the screw thread engagement between the adjusting screw and the piercing knife, and by screwing the adjusting screw to flexibly adjust the cutting depth of the piercing knife, precise control of the piercing area is achieved, the tearing opening of the product is reduced, the part quality is improved, and it can be reused in different projects, significantly reducing the development and debugging costs, improving the trial mold efficiency, reducing the operation difficulty, and it is expected to save about 30% of the debugging time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and additional advantages of the present utility model will become obvious and easy to understand in conjunction with the description of the embodiments with reference to the following drawings, wherein:

[0015] Figure 1 is a schematic diagram of a depth-adjustable and reusable trial production door inner panel piercing device according to an embodiment of the present utility model;

[0016] Figure 2 is an inverted schematic diagram of a depth-adjustable and reusable trial production door inner panel piercing device according to an embodiment of the present utility model;

[0017] Figure 3 is a vertical cross-sectional schematic diagram of a depth-adjustable and reusable trial production door inner panel piercing device according to an embodiment of the present utility model;

[0018] Figure 4 is a horizontal cross-sectional schematic diagram of a depth-adjustable and reusable trial production door inner panel piercing device according to an embodiment of the present utility model;

[0019] Figure 5 is a schematic diagram of a piercing device of a depth-adjustable and reusable trial production door inner panel piercing device according to an embodiment of the present utility model installed on a mold body.

[0020] Wherein, 1 - piercing knife, 2 - fixed backing plate, 3 - adjusting screw, 4 - limit nut, 5 - fixing screw, 10 - piercing device, 20 - mold body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to be able to more clearly understand the above objects, features and advantages of the present utility model, the present utility model will be further described in detail below in conjunction with the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0022] In the following description, numerous specific details are set forth to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present utility model is not limited by the specific embodiments disclosed below.

[0023] As Figures 1 to 5 shown, this embodiment provides a depth-adjustable and reusable trial production door inner panel piercing device. The piercing device 10 is embedded and installed on the surface of the mold body 20. The piercing device 10 includes: a piercing knife 1, a fixed backing plate 2, adjusting screws 3, a limit nut 4, and a fixing screw 5.

[0024] The piercing knife 1 is embedded and installed on the upper surface of the fixed backing plate 2 through the adjusting screws 3. The outer surface of the piercing knife 1 has multiple layers of cross stripes, and the cross stripes engage with the threads on the surface of the adjusting screws 3. Through holes are opened at the four corners of the fixed backing plate 2. The through holes communicate with the gaps for embedding the piercing knife 1. The adjusting screws 3 are inserted into the through holes from the upper surface of the fixed backing plate 2, and the limit nut 4 is inserted into the through holes from the lower surface of the fixed backing plate 2. The threads of the adjusting screws 3 are screwed into the limit nut 4. The diameter of the screw part of the adjusting screws 3 is smaller than the minimum diameter of the through holes, and the surface of the through holes does not have threads. Another through hole is opened at the center of the fixed backing plate 2. The fixing screw 5 is inserted into the through hole from the upper surface of the fixed backing plate 2 to fix the piercing device 10 to the mold body 20.

[0025] In addition, in this embodiment, the piercing knife 1 is of an involute type, the piercing end is at the center of the piercing area, and an arc-shaped continuous cutting edge is formed around the piercing, which is not easy to generate a tear opening, can effectively protect the integrity of the product area, and ensure the best stress release of the workpiece.

[0026] During operation, the piercing device 10 is embedded and fixed on the surface of the mold body 20. If the cutting edge penetrates too deep and the height of the piercing knife 1 needs to be reduced, first loosen the fixing screw 5 (without unscrewing it) to leave a space for the movement of the limit nut 4 at the bottom of the piercing device 10. Then, turn multiple adjusting screws 3 in sequence to drive the piercing knife 1 to change its height. After adjusting to the appropriate height, tighten the fixing screw 5 and continue working. If only local adjustment of the penetration depth is required, when turning the adjusting screws 3, only adjust the local position where the height of the piercing knife 1 needs to be changed individually.

[0027] In summary, the present utility model proposes a depth-adjustable and reusable trial production door inner panel piercing device. The piercing device 10 is embedded and installed on the surface of the mold body 20. The piercing device 10 includes: a piercing knife 1, a fixed backing plate 2, adjusting screws 3, a limit nut 4, and a fixing screw 5.

[0028] The upper surface of the fixed backing plate 2 has a gap matching the shape and size of the piercing knife 1, and the piercing knife 1 is embedded in the gap on the upper surface of the fixed backing plate 2.

[0029] A number of through holes are provided at the four corners and the center of the fixed backing plate 2. The through holes at the four corners are communicated with the gaps for embedding the puncturing knife 1. The adjusting screws 3 are inserted into the through holes at the four corners from the upper surface of the fixed backing plate 2, and the limit nuts 4 are inserted into the through holes at the four corners from the lower surface of the fixed backing plate 2. The threads of the adjusting screws 3 are screwed into the limit nuts 4.

[0030] The outer surface of the puncturing knife 1 has multiple layers of cross stripes, and the cross stripes engage with the threads on the surface of the adjusting screws 3.

[0031] The fixing screw 5 is inserted into the through hole at the center from the upper surface of the fixed backing plate 2, and the fixing screw 5 fixes the puncturing device 10 to the mold body 20.

[0032] In the present utility model, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linkage" can be a direct linkage or an indirect linkage through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The shapes of the various components in the drawings are schematic, and there is no exclusion of a certain difference from their actual shapes. The drawings are only used to illustrate the principle of the present utility model and are not intended to limit the present utility model.

[0034] Although the present utility model has been disclosed in detail with reference to the drawings, it should be understood that these descriptions are merely exemplary and are not used to limit the application of the present utility model. The protection scope of the present utility model is defined by the appended claims and may include various modifications, adaptations, and equivalent solutions made to the utility model without departing from the protection scope and spirit of the present utility model.

Claims

1. A reusable trial-produced door inner panel piercing device with adjustable depth, characterized in that: The piercing device (10) is embedded and installed on the surface of the mold body (20), and the piercing device (10) comprises: a piercing knife (1), a fixing pad (2), an adjusting screw (3), a limiting nut (4) and a fixing screw (5); The upper surface of the fixed backing plate (2) is provided with a slit that matches the shape and size of the puncturing knife (1), and the puncturing knife (1) is embedded in the slit on the upper surface of the fixed backing plate (2); The fixing plate (2) is provided with a plurality of through holes at the four corners and the center, the through holes at the four corners are connected to the gaps for embedding the puncture knife (1), the adjusting screw (3) is inserted into the through holes at the four corners from the upper surface of the fixing plate (2), the limiting nut (4) is inserted into the through holes at the four corners from the lower surface of the fixing plate (2), and the thread of the adjusting screw (3) is screwed into the limiting nut (4); The outer surface of the puncturing knife (1) has multiple layers of transverse stripes, and the transverse stripes engage with the threads on the surface of the adjusting screw (3); The fixing screw (5) is inserted into the central through hole from the upper surface of the fixing pad (2), and the fixing screw (5) fixes the piercing device (10) and the mold body (20).

2. The depth-adjustable, reusable, trial-produced door inner panel piercing device according to claim 1, characterized in that: The diameter of the screw portion of the adjustment screw (3) is smaller than the minimum diameter of the through holes at the four corners of the fixing pad (2).

3. The depth-adjustable and reusable prototype door inner panel piercing device according to claim 1, characterized in that: The through holes at the four corners of the fixing pad (2) have no threads on their surfaces.

4. The depth-adjustable, reusable, trial-produced door inner panel piercing device according to claim 1, characterized in that: The puncture knife (1) is of an inwardly rolled type, and the puncture end is located at the center of the puncture area.

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