Fastening screw applied to automobile hardware stamping part

Abstract

The fastening screw applied to the automobile hardware stamping part comprises a screw body, the screw body is designed to be hollow, a screw head is arranged at the upper end of the screw body, a step communicated with the hollow position is arranged in the middle of the upper end face of the screw head, a circle of backflow groove is formed in the outer side of the step, the radius of the backflow groove ranges from 0.5 mm to 1.0 mm, and the diameter of the backflow groove ranges from 0.5 mm to 1.0 mm. Compared with the prior art, the screw is improved, when a plate is welded, due to the protruding effect of the boss, molten iron obtained after welding flows into the backflow groove, it is guaranteed that welding slag cannot enter a hole or the surface of a product, the second procedure is reduced, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile hardware, in particular to a fastening screw used for automobile hardware stamping parts. Background Art

[0002] Automotive hardware has a plate that needs to be welded and fused into a screw to make the plate have a locking function. Currently, two processes are required. The first is fusion welding, and the second is to grind the welding slag remaining in the hollow of the screw to ensure that the inside is smooth so as not to affect the locking. However, this method is not efficient. Utility Model Content

[0003] In order to solve the above problems, the present technical solution provides fastening screws applied to automobile metal stamping parts.

[0004] To achieve the above purpose, the technical solution is as follows:

[0005] A fastening screw used for automobile hardware stamping parts includes a screw body, the screw body is hollow in design, a screw head is provided at the upper end of the screw body, a step connected to the hollow part is provided in the middle of the upper end surface of the screw head, a circle of backflow groove is provided on the outer side of the step, and the radius of the backflow groove is between 0.5-1.0MM.

[0006] In some embodiments, the outer side of the step is a guiding slope.

[0007] In some embodiments, the cross-section of the backflow groove is circular.

[0008] The beneficial effects of this application are:

[0009] The present application improves the screws. When they are welded into the plate, the convex effect of the boss allows the molten iron after welding to flow into the backflow trough, thereby ensuring that welding slag cannot enter the hole or the surface of the product, thereby reducing the second process and greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0011] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0012] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0013] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0014] Please refer to Figure 1-2 As shown, a fastening screw used for automobile hardware stamping parts includes a screw body 1, the screw body 1 is hollow in design, a screw head 2 is provided at the upper end of the screw body 1, a step 3 connected to the hollow part is provided in the middle of the upper end surface of the screw head 2, a circle of backflow groove 4 is provided on the outer side of the step 3, and the radius of the backflow groove 4 is between 0.5-1.0MM.

[0015] In order to solve the problem of residual welding slag, the structural design of welding fasteners was improved. After welding, no manual secondary grinding was required to meet the product size requirements. Compared with the original production method, the production efficiency was greatly improved.

[0016] In this embodiment, the outer side of the step 3 is a guiding inclined surface.

[0017] In this embodiment, the cross section of the backflow groove 4 is circular.

[0018] When the fastener screw is welded to the plate, the molten iron will flow into the screw circular groove after welding. The space in the circular groove is sufficient to accommodate the molten iron after welding without overflow, thus ensuring the outflow of welding slag after welding and preventing welding slag from entering the product hole and product surface. In this structure, the fastener screw is optimized, and a circle of guide grooves is added to the welding end of the screw to guide the molten iron. This guide groove is a circular groove with a radius of 0.5-1.0. Through the optimization of this structure, the welding slag problem of this type of fastener is improved, while also ensuring the final size and required strength of the product.

[0019] The above conditions mean that modifications and production can be carried out without affecting the product size and product strength performance.

[0020] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application. Other principles and basic structures that are the same or similar to those of the present application are within the protection scope of the present application.

Claims

1. Fastening screws used in automotive metal stamping parts, characterized in that: The invention comprises a screw body (1), wherein the screw body (1) is hollow in design, a screw head (2) is arranged at the upper end of the screw body (1), a step (3) connected to the hollow part is arranged in the middle of the upper end surface of the screw head (2), and a circle of backflow groove (4) is arranged outside the step (3), and the radius of the backflow groove (4) is between 0.5 and 1.0 mm.

2. The fastening screw used for automobile metal stamping parts according to claim 1 is characterized in that: The outer side of the step (3) is a guiding inclined surface.

3. The fastening screw used for automobile metal stamping parts according to claim 2 is characterized in that: The cross section of the backflow groove (4) is circular.

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