Core structure of an automotive gasket mold and its processing method

Abstract

The present invention discloses a core structure and method of an automobile gasket mold, relating to the technical field of numerical control machining. It includes a mold base, on the top of which there is a core mating surface. A cavity is provided on the top of the mold base. The core mating surface is distributed around the cavity. A reference demarcation line is provided at a position offset 8 - 10 mm from the intersection line of the cavity. A high-precision machining area is provided in the area of the core mating surface relatively close to the cavity, and a general-precision machining area is provided in the area of the core mating surface relatively far from the cavity. And the step difference between the high-precision machining area and the general-precision machining area is 0.02 mm. The structure of the present invention is simple and has strong practicability. By the combined use of the high-precision machining area, the general-precision machining area and the completely clearance area, the processing time can be greatly reduced and the processing cost can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical control machining, and particularly relates to a core structure of an automobile gasket mold and a machining method thereof. Background Art

[0002] The existing machining method for the core mating surface of an automobile gasket mold usually uses a designed 3D model to directly perform overall cutting machining with a milling cutter. Due to the large area of the mating surface, the milling cutter is worn during the machining process, resulting in uneven allowances and inaccurate dimensional accuracy of the mating surface. In subsequent processes, a grinding machine, sandpaper, etc. are required for fitting work during the assembly process, increasing the workload of the assembly personnel, affecting the appearance and construction period of the mold, and increasing the manufacturing cost of the mold, which does not conform to the characteristics of high-efficiency and stable-quality machining in numerical control machining. Therefore, the existing machining process method for the core mating surface of the mold needs to be further improved. Summary of the Invention

[0003] The present invention provides a core structure of an automobile gasket mold, which solves the technical problem that the machining dimensions may be inaccurate due to the large area of the mating surface in the prior art during the machining process.

[0004] To solve the above technical problems, a core structure of an automobile gasket mold provided by the present invention includes a mold base. A core mating surface is provided on the top of the mold base. A cavity is provided on the top of the mold base. The core mating surface is distributed around the cavity. A reference demarcation line is provided at a position offset 8 - 10 mm from the intersection line of the cavity on the core mating surface. A high-precision machining area is provided in the area of the core mating surface relatively close to the cavity, and a general-precision machining area is provided in the area of the core mating surface relatively far from the cavity. The step difference between the high-precision machining area and the general-precision machining area is 0.02 mm. Another reference demarcation line is provided 8 - 10 mm away from the high-precision machining area in the general-precision machining area. A completely clearance area is provided at the position of the other reference demarcation line away from the high-precision machining area. The step difference between the general-precision machining area and the completely clearance area is 0.3 mm.

[0005] Preferably, a notch adapted to the automobile gasket body is provided in the cavity.

[0006] Preferably, the number of the notches is two, which are circular and rectangular respectively.

[0007] Preferably, eleven mounting holes are provided on both sides of the mold base.

[0008] Preferably, the material of the mold base is high-carbon low-alloy.

[0009] On the other hand, the present invention provides a processing method for a core of an automobile gasket mold, including a core mating surface, on which a cavity and a mating surface to be machined are provided, and the mating surface to be machined is distributed around the cavity. The method is characterized by the following steps:

[0010] On the core mating surface, a first reference demarcation line is set at a distance of 8 - 10 mm offset from the intersection line between the core mating surface and the cavity;

[0011] The area of the core mating surface relatively close to the cavity is set as a high-precision machining area; the area relatively far from the cavity is set as a general-precision machining area, and a step difference of 0.02 mm is formed between the general-precision machining area and the high-precision machining area;

[0012] A second reference demarcation line is set at a distance of 8 - 10 mm from the high-precision machining area in the general-precision machining area, and the position far from the high-precision machining area is set as a complete clearance area, and a step difference of 0.3 mm is formed between the complete clearance area and the general machining precision area;

[0013] For the complete clearance area, only medium machining is required and no finish machining is needed; for the finish machining process of the general-precision machining area, corresponding milling cutters and corresponding set machining feeds and cutting amounts are used; for the finish machining process of the high-precision machining area, corresponding milling cutters and corresponding set machining feeds and cutting amounts are used;

[0014] After the finish machining of the high-precision machining area, a spherical milling cutter is used to detect the machining allowance by scribing to check whether the high-precision machining area is the shape and size required for the core mating surface. If so, it is a qualified product; if not, reprocessing is required.

[0015] Compared with the related technology, the core structure of an automobile gasket mold provided by the present invention has the following beneficial effects:

[0016] 1. In the present invention, when the device is in use, by setting the coordinated use of a high-precision machining area, a general-precision machining area, and a complete clearance area, when the staff processes the complete clearance area, only rough machining is required, and no finish machining is needed, thus saving the finish machining time and the milling cutters required for finish machining of the complete clearance area, reducing the machining cost. Similarly, when processing the general-precision machining area, ordinary finish machining milling cutters, large machining feed rates, and cutting amounts are used to shorten the finish machining time and the milling cutters required for high-precision machining of the general-precision machining area, reducing the machining cost. For the high-precision machining area, during its finish machining process, brand-new milling cutters and machining feed rates and cutting amounts within the normal range are used to obtain stable and reliable machining accuracy, meeting the machining requirements of the core mating surface. At the same time, after machining is completed, a brand-new spherical milling cutter can also be used to detect the machining allowance by scribing to ensure that the high-precision machining area is the shape and size required by the core mating surface, avoiding repeated rework on the machine due to unqualified machining. This device solves the problem that in the prior art, during the machining process, due to the relatively large area of the mating surface, inaccurate machining dimensions may occur.

[0017] 2. In the present invention, when the device is in use, the device can be conveniently installed by setting installation holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the traditional numerical control machining method for the mating surface;

[0019] Figure 2 is a schematic diagram of the hierarchical treatment of the core mating surface in the core structure of an automotive gasket mold;

[0020] Figure 3 is a schematic diagram of quickly detecting the machining allowance after machining in the core structure of an automotive gasket mold;

[0021] Figure 4 is a schematic diagram of the overall structure of the core structure of an automotive gasket mold;

[0022] Figure 5 is a schematic diagram of a new machining method for the mating surface in the core structure of an automotive gasket mold;

[0023] Figure 6 is the traditional combination of the front and rear molds;

[0024] Figure 7 is the mold combination of the new machining method in the core structure of an automotive gasket mold;

[0025] Figure 8 is a schematic diagram of the modification of the core mating surface in the core structure of an automotive gasket mold;

[0026] Figure 9 Schematic diagram of the completely clearance area structure in the core structure of an automotive gasket mold;

[0027] Figure 10 Schematic diagram of the structure of the general precision machining area in the core structure of an automotive gasket mold;

[0028] Figure 11 Schematic diagram of the structure of the high-precision machining area in the core structure of an automotive gasket mold;

[0029] Figure 12 Schematic diagram of the structure for quickly detecting machining allowance after machining in the core structure of an automotive gasket mold.

[0030] Reference numerals in the figure: 1, mold base; 2, core mating surface; 3, cavity; 4, high-precision machining area; 5, general precision machining area; 6, completely clearance area; 7, mounting hole. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1, given by Figures 1-12 The present invention includes a mold base 1. A core mating surface 2 is provided on the top of the mold base 1. A cavity 3 is provided on the top of the mold base 1. The core mating surface 2 is distributed around the cavity 3. A reference demarcation line is provided at a position offset 8 - 10 mm from the intersection line of the cavity 3. A high-precision machining area 4 is provided in the area of the core mating surface 2 relatively close to the cavity 3. A general precision machining area 5 is provided in the area of the core mating surface 2 relatively far from the cavity 3. And the step difference between the high-precision machining area 4 and the general precision machining area 5 is 0.02 mm. Another reference demarcation line is provided 8 - 10 mm away from the high-precision machining area 4 in the general precision machining area 5. A completely clearance area 6 is provided at the position of the other reference demarcation line away from the high-precision machining area 4. And the step difference between the general precision machining area 5 and the completely clearance area 6 is 0.3 mm.

[0033] Embodiment 2, on the basis of Embodiment 1, a notch adapted to the automotive gasket body is provided in the cavity 3. This setting can facilitate the machining of the automotive gasket.

[0034] Embodiment 3, on the basis of Embodiment 2, the number of notches is two, and they are circular and rectangular respectively. This setting can improve the precision of machining the gasket.

[0035] Example 4. On the basis of Example 1, mounting holes 7 are provided on both sides of the mold base 1, and the number of the mounting holes 7 is eleven. This setting facilitates the installation of the mold base 1.

[0036] Example 6. On the basis of Example 1, the material of the mold base 1 is high-carbon low-alloy. This setting takes advantage of the good stability of high-carbon low-alloy to extend the service life of the device.

[0037] On the other hand, the present invention also provides a processing method for the core of an automotive gasket mold, including a core mating surface. A cavity and a mating surface to be machined are provided on the core mating surface, and the mating surfaces to be machined are distributed around the cavity. The method is characterized in that it includes the following steps:

[0038] On the core mating surface, a first reference dividing line is set offset 8-10 mm from the intersection line of the core mating surface and the cavity.

[0039] The area of the core mating surface relatively close to the cavity is set as a high-precision machining area; the area relatively far from the cavity is set as a general-precision machining area. The 3D model of the general-precision machining area is lowered by 0.02 mm to form a 0.02-mm step difference between the general-precision machining area and the high-precision machining area.

[0040] A second reference dividing line is set 8-10 mm away from the high-precision machining area in the general-precision machining area. The position far from the high-precision machining area is set as a complete clearance area. The 3D model of the complete clearance area is lowered by 0.3 mm to form a 0.3-mm step difference between the complete clearance area and the general machining precision area.

[0041] For the complete clearance area, only rough machining is required, and no finish machining is needed; for the finish machining process of the general-precision machining area, corresponding milling cutters and corresponding set machining feeds and cutting amounts are used; for the finish machining process of the high-precision machining area, corresponding milling cutters and corresponding set machining feeds and cutting amounts are used. The machining feed rate of the high-precision machining area is less than that of the general-precision machining area.

[0042] After the finish machining of the high-precision machining area, a spherical milling cutter is used to detect the machining allowance by scribing to check whether the high-precision machining area is the shape and size required for the core mating surface. If so, it is a qualified product; if not, reprocessing is required.

[0043] During specific use, by setting the combined use of the high-precision machining area 4, the general-precision machining area 5, and the complete clearance area 6, when the staff processes the complete clearance area 6, only rough machining is required and no finish machining is needed, thus saving the finish machining time of the complete clearance area 6 and the milling cutters required for finish machining, reducing the machining cost. Similarly, when machining the general-precision machining area 5, ordinary finish-machining milling cutters, large machining feed rates, and cutting amounts are used to shorten the finish machining time of the general-precision machining area 5 and the milling cutters required for high-precision machining, reducing the machining cost. For the high-precision machining area 4, corresponding milling cutters, machining feed rates, and cutting amounts within the normal range are used during its finish machining process to obtain stable and reliable machining accuracy, meeting the machining requirements of the core mating surface. At the same time, after machining is completed, a brand-new spherical milling cutter can also be used to detect the machining allowance by scribing to ensure that the high-precision machining area 4 has the shape and dimensions required for the core mating surface, avoiding repeated rework on the machine due to unqualified machining. This device solves the problem in the prior art that during the machining process, inaccurate machining dimensions may occur due to the relatively large area of the mating surface.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A core structure of an automobile gasket mold, comprising a mold base (1), characterized in that: The top of the mold base (1) is provided with a core-matching curved surface (2), and a cavity (3) is arranged on the top of the mold base (1). The core-matching curved surface (2) is distributed around the cavity (3). A reference dividing line is arranged between the core-matching curved surface (2) and the intersection line of the cavity (3). A high-precision machining area (4) is arranged in the area of the core-matching curved surface (2) relatively close to the cavity (3), and a general-precision machining area (5) is arranged in the area of the core-matching curved surface (2) relatively far from the cavity (3). There is a step difference between the high-precision machining area (4) and the general-precision machining area (5). Another reference dividing line is arranged at the position of the general-precision machining area (5) far from the high-precision machining area (4), and a complete clearance area (6) is arranged at the position of the other reference dividing line far from the high-precision machining area (4). There is a step difference between the general-precision machining area (5) and the complete clearance area (6); the step difference between the general-precision machining area (5) and the complete clearance area (6) is 0.3 mm; the step difference between the high-precision machining area (4) and the general-precision machining area (5) is 0.02 mm; one of the reference dividing lines is arranged at a position offset 8-10 mm from the intersection line of the core-matching curved surface (2) and the cavity (3), and the other reference dividing line is arranged at 8-10 mm from the high-precision machining area (4) in the general-precision machining area (5).

2. The core structure of an automotive gasket mold according to claim 1, characterized in that, A notch adapted to the automotive gasket body is provided in the cavity (3).

3. The core structure of an automobile gasket mold according to claim 2, characterized in that, The number of the notches is two, which are circular and rectangular respectively.

4. The core structure of an automotive gasket mold according to claim 1, characterized in that, Mounting holes (7) are provided on both sides of the mold base (1), and the number of the mounting holes (7) is eleven.

5. The core structure of an automotive gasket mold according to claim 1, characterized in that, The material of the mold base (1) is high-carbon low-alloy.

6. A processing method for the core of an automotive gasket mold according to claim 1, including a core mating surface, where a cavity and a mating surface to be processed are provided on the core mating surface, and the mating surfaces to be processed are distributed around the cavity. It is characterized in that, The method comprises the following steps: On the core-matching curved surface, a first reference dividing line is arranged at a position offset 8-10 mm from the intersection line of the core-matching curved surface and the cavity. The area of the core-matching curved surface relatively close to the cavity is set as the high-precision machining area; the area relatively far from the cavity is set as the general-precision machining area, and a step difference of 0.02 mm is formed between the general-precision machining area and the high-precision machining area. A second reference dividing line is arranged at 8-10 mm from the high-precision machining area in the general-precision machining area, and the position far from the high-precision machining area is set as the complete clearance area, and a step difference of 0.3 mm is formed between the complete clearance area and the general machining precision area. For the complete clearance area, only medium machining is required and no finish machining is needed; for the finish machining process of the general-precision machining area, corresponding milling cutters and corresponding set machining feeds and cutting amounts are adopted; for the finish machining process of the high-precision machining area, corresponding milling cutters and corresponding set machining feeds and cutting amounts are adopted. After the finish machining of the high-precision machining area, a spherical milling cutter is used to detect the machining allowance by scribing to check whether the high-precision machining area is the shape and size required by the core-matching curved surface. If so, it is a qualified product; if not, re-machining is required.

Images