Technological method for improving trimming burrs of charging port of fender and improving quality of surface product

Abstract

The invention provides a process method for improving trimming burrs of a charging port of a fender and improving the quality of a surface product, which comprises the following steps of: performing supplementary drawing on the charging port of the fender during punch forming, extending the boundaries at the two ends of the product inwards, and forming supplementary grooves at the two ends of the product. The trimming device has the beneficial effects that trimming burrs of stamped parts with charging ports and surface products are mutually restricted and exist at the same time, and solutions are mutually influenced. Through the change of a supplement form, the consistency of material contact points is controlled, the problems of trimming burrs of a workpiece and a charging port ridge circumferential surface product are solved, and certain production efficiency is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of fender charging port processing, and in particular relates to a process method for improving the trimming burrs of the fender charging port and improving the surface quality. Background Art

[0002] Due to the limitation of the body shape, the location of the fender charging port has a large drop in the part surface. The large drop in the surface of this area brings problems;

[0003] In the OP20 trimming process, the trimming angle requirement of ±15 degrees cannot be met on both sides (maximum ±20 degrees) at the same time; the trimming angle on one side is met, but the trimming angle on the other side is out of tolerance, which is prone to burrs, which splash onto the mold body and affect the surface quality of the product;

[0004] The additional features of the charging port mentioned above can well meet the requirements of part forming and ensure the quality of the surface during the stamping process; however, the burrs caused by trimming cannot be avoided, and the mold needs to be cleaned regularly for a short period of time, which greatly affects production efficiency. Invention content

[0005] In view of this, the present invention aims to propose a process method for improving the trimming burrs of the fender charging port and improving the surface quality, so as to solve at least one technical problem in the background technology.

[0006] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0007] The process method for improving the trimming burrs of the fender charging port and improving the surface quality includes the following steps: supplementing the fender charging port with drawing during stamping, the boundaries at both ends of the product are extended inward, and supplementary grooves are provided at both ends of the product.

[0008] Furthermore, the boundaries at both ends of the product and the boundary of the product between the two supplementary grooves are arranged on the same plane.

[0009] Furthermore, the cross-section of the supplementary groove includes a straight segment, an inclined segment, a growth segment, and an arc segment; the straight segment is extended from the boundary of the fender charging port, and the straight segment, the inclined segment, the growth segment, and the arc segment are connected in sequence.

[0010] Furthermore, the angle between the inclined section and the horizontal direction is 10-20°.

[0011] Furthermore, the angle between the inclined section and the horizontal direction is 15°.

[0012] Furthermore, the length of the straight line segment is between 0.5-2 mm.

[0013] Furthermore, the straight segment and the growth segment are on the same straight line;

[0014] The length of the growth segment is 2-4 mm.

[0015] Furthermore, the length of the growth section is 3 mm.

[0016] Compared with the prior art, the process method for improving the trimming burrs of the fender charging port and improving the surface quality created by the present invention has the following advantages:

[0017] 1. This application can effectively solve the problem of iron cutting caused by excessive trimming angles, but directly filling the charging port will result in a large difference between the upper and lower surfaces, and the molding will easily produce surface quality problems. Therefore, it is necessary to solve the surface quality problems caused by the gap while ensuring trimming.

[0018] 2. This application solves the problem of trimming burrs and surface quality of stamped parts with charging ports, and the solutions affect each other. By changing the supplementary form, the consistency of the contact point of the contact material is controlled, the problem of trimming burrs and surface quality around the edge of the charging port is solved, and a certain production efficiency is guaranteed.

[0019] 3. In an environment where competition in the mold industry is becoming increasingly fierce, customer requirements are becoming increasingly stringent, and processes are becoming increasingly compressed, the present invention can solve relatively difficult problems in the industry in a simple and effective manner in a shorter period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of the original fender charging port created by the present invention;

[0022] Figure 2 Created for this invention Figure 1 The BB section diagram shown and the comparison with Example 1 of the present invention;

[0023] Figure 3 A schematic diagram of the supplementary tank described in Example 1 of the present invention;

[0024] Figure 4 A schematic diagram of the original fender charging port described in Example 2 of the present invention;

[0025] Figure 5 Created for this invention Figure 4 The EE cross-sectional diagram (K1 and K3 are the product boundaries at both ends, and K2 is the product boundary between the two supplementary grooves);

[0026] Figure 6 This is a schematic diagram of the peripheral surface defects caused by the height difference in comparative example 1 created by the present invention;

[0027] Figure 7 A schematic diagram of the original fender charging port described in Comparative Example 1 of the present invention;

[0028] Figure 8 A schematic diagram of parameters of the original fender charging port described in Comparative Example 1 of the present invention;

[0029] Fig. 9 This is a cross-sectional schematic diagram of the original fender charging port described in Comparative Example 1 created by the present invention;

[0030] Fig.10 Created for this invention Fig. 9 Schematic diagram of the AA section. Specific implementation methods

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0034] Example 1

[0035] like Figure 2 and Figure 3 As shown, the process method for improving the trimming burrs of the fender charging port and improving the surface quality includes the following steps: the fender charging port is supplemented with drawing during stamping, the boundaries of both ends of the product are extended inward, and both ends of the product are provided with supplementary grooves; the cross-section of the supplementary groove includes a straight section, an inclined section, a growth section, and an arc section; the straight section is extended at the boundary of the fender charging port, and the straight section, the inclined section, the growth section, and the arc section are connected in sequence. The angle between the inclined section and the horizontal direction is 15°, and the arc section is obtained by chamfering the R angle;

[0036] The length of the straight segment is between 1.5 mm. The straight segment and the growth segment are on the same straight line; the length of the growth segment is 3 mm.

[0037] Example 2

[0038] The process method for improving the trimming burrs of the fender charging port and improving the surface quality includes the following steps: supplementary drawing is performed on the fender charging port during stamping, and the boundaries at both ends of the product are extended inward, and supplementary grooves are provided at both ends of the product; the boundaries at both ends of the product and the product boundaries between the two supplementary grooves are set in the same plane. The cross-section of the supplementary groove includes a straight line segment, an inclined segment, a growth segment, and an arc segment; the straight line segment is extended from the boundary of the fender charging port, and the straight line segment, the inclined segment, the growth segment, and the arc segment are connected in sequence. The angle between the inclined segment and the horizontal direction is 15°, and the arc segment is obtained by chamfering the R angle;

[0039] The length of the straight segment is between 1.5 mm. The straight segment and the growth segment are on the same straight line; the length of the growth segment is 3 mm.

[0040] like Figure 4 and Figure 5 As shown, Example 1 can effectively solve the problem of iron chipping caused by excessive trimming angles. However, the charging port is directly filled in this way, and the difference between the upper and lower surfaces is large, and the molding is prone to surface quality problems. Therefore, it is necessary to solve the surface quality problem caused by the difference while ensuring trimming.

[0041] In Example 2, both the trimming angle and the consistency of the contact point are guaranteed, and the burr problem caused by trimming tolerance is well solved, and the surface defects caused by inconsistent contact are well guaranteed. Under the premise of ensuring quality, production efficiency can be improved, which brings great benefits to mold production.

[0042] Comparative Example 1

[0043] The fender charging port position has a large drop in the part surface. The large drop in the surface of this area brings problems: 1. The trimming angle requirement of ±15 degrees (maximum ±20 degrees) cannot be met on both sides of the OP20 trimming process; the trimming angle on one side is met, but the trimming angle on the other side is out of tolerance, which is easy to generate burrs, which splash onto the mold body and affect the surface quality of the part.

[0044] like Figure 7-10 As mentioned above, the additional features of the charging port can well meet the requirements of part forming and ensure the quality of the surface during the stamping process; however, the burrs caused by trimming are unavoidable, and the mold needs to be cleaned regularly for a short period of time, which greatly affects production efficiency. Now we use drawing to supplement and increase the modeling features to meet the requirements of trimming angle and surface quality.

[0045] This application can reduce the downtime rate and improve production efficiency. Previously, the production line needed to be stopped for maintenance for 15 days (10 hours of work per day, 126,000 pieces can be pressed in 15 days), and the downtime time was 2 hours. Now, according to this solution, 2 hours of time can be saved. The production cycle is 14 pieces per minute, so the saved 2 hours can produce 1,680 more pieces. Then the efficiency value increased in 15 days is: 1,680 / 126,000 = 1.3%. It can be widely promoted and has great economic benefits.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A process for improving the trimming burrs of the fender charging port and improving the surface quality, characterized by: The method comprises the following steps: supplementing and drawing the fender charging port during stamping and forming, the boundaries at both ends of the product are extended inward, and supplementary grooves are provided at both ends of the product.

2. The process for improving the trimming burrs and surface quality of the fender charging port according to claim 1, characterized in that: The boundaries of both ends of the product and the boundary of the product between the two supplementary slots are arranged in the same plane.

3. The process for improving the trimming burrs and surface quality of the fender charging port according to claim 1 or claim 2, characterized in that: The cross-section of the supplementary groove includes a straight segment, an inclined segment, a growth segment, and an arc segment; the straight segment is extended from the boundary of the fender charging port, and the straight segment, the inclined segment, the growth segment, and the arc segment are connected in sequence.

4. The process for improving the trimming burrs and surface quality of the fender charging port according to claim 1, characterized in that: The angle between the inclined section and the horizontal direction is 10-20°.

5. The process for improving the trimming burrs and surface quality of the fender charging port according to claim 1 is characterized in that: The angle between the inclined section and the horizontal direction is 15°.

6. The process for improving the trimming burrs and surface quality of the fender charging port according to claim 1, characterized in that: The length of the straight line segment is between 0.5 and 2 mm.

7. The process for improving the trimming burrs and surface quality of the fender charging port according to claim 2 is characterized in that: The straight segment and the growth segment are on the same straight line; The length of the growth section is 2-4 mm, preferably, the length of the growth section is 3 mm.

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