A method for manufacturing a powder metallurgy forming inductor stamping die and the die

Abstract

The invention relates to the technical field of mold making, in particular to a method for making a powder metallurgy forming inductor stamping mold and a mold. The method comprises the following steps: cutting step 1: selecting imported CPM-10V mold steel; cutting step 2: cutting the imported CPM-10V mold steel through a cutting device for standby; preliminary processing step 1: sending the imported CPM-10V mold steel after the cutting preparation to a numerical control lathe device for rough cutting to form a preliminary mold shape; preliminary processing step 2: sending the preliminary formed mold to a surface grinding device for rough grinding to remove surface burrs; preliminary processing step 3: sending the ground mold to a CNC machining center for positioning and opening operations; the method for making a powder metallurgy forming inductor stamping mold and the mold solve the shortcomings of the prior art, such as short service life, easy cracking, heat treatment and immature machining process.

Description

Technical Field

[0001] The invention relates to the technical field of mold manufacturing, and in particular to a manufacturing method and a mold for a powder metallurgy forming inductor stamping mold. Background Art

[0002] When producing inductors, the manufacturing materials need to be pressed and formed, such as a method for manufacturing an inductor and an inductor recorded in Chinese patent number: "CN202210325501.1", in which the molding step is to place the raw materials into a mold and press them.

[0003] The existing mold device used for stamping and pressing semi-finished inductors includes an upper mold plate, a lower mold plate, and an upper punch and a lower punch that match them. Its working principle is to utilize the mutual cooperation between the upper mold plate and the lower mold plate, and to form the inductor through the opposite extrusion applied by the upper punch and the lower punch to the upper mold plate and the lower mold plate. Its specific working method is that the lower mold plate and the lower punch are fixed on the working table of the hydraulic equipment, and the hydraulic equipment automatically injects iron powder into the forming hole in the lower mold plate, and then the upper mold plate and the upper punch simultaneously extrude the raw material downward to form it.

[0004] However, the existing upper and lower mold plates used for inductor stamping have a short service life, which makes the product size unstable during the production process. The materials used to manufacture the upper and lower mold plates are prone to cracking. The heat treatment process during production is not mature enough. At the same time, the low processing accuracy also makes the forming hole accuracy poor, and the smoothness of the side wall fails to meet the requirements. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art such as short service life, easy cracking, immature heat treatment and processing technology, and propose a method for manufacturing a powder metallurgy forming inductor stamping die and a die.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for manufacturing a powder metallurgy forming inductor stamping die is designed, comprising the following steps:

[0008] S1. Cutting step 1: Select imported CPM-10V mold steel;

[0009] S2, cutting step 2: cutting the imported CPM-10V mold steel through the cutting equipment for later use;

[0010] S3, preliminary processing step 1: after the material preparation, the imported CPM-10V mold steel is sent to the CNC lathe equipment for rough cutting to form the preliminary mold shape;

[0011] S4, preliminary processing step 2: sending the initially formed mold to a surface grinding device for rough grinding to remove surface burrs;

[0012] S5, preliminary processing step 3: sending the polished mold to the CNC machining center for positioning and opening operations;

[0013] S6, heat treatment step: heat treatment of the mold after being processed by the CNC machining center;

[0014] S7, precision processing step 1: the heat-treated mold is again cut with high precision by CNC lathe equipment to perfect the main body;

[0015] S8, precision processing step 2: sending the cut mold to the surface grinding equipment for fine grinding;

[0016] S9, precision processing step 3: sending the polished mold to the CNC machining center for secondary precision machining;

[0017] S10, precision processing step 4: send the mold after secondary precision processing to the wire-feeding equipment to perform high-precision processing on the forming holes, so that the accuracy between the forming holes of the upper die plate and the lower die plate is controlled within + / -0.005um, and the smoothness is between 0.3;

[0018] S11, precision processing step 5: the processed mold is sent to the surface grinding device again to perform high-precision processing on the side wall of the mold, so that the matching clearance between the upper mold plate and the lower mold plate is controlled between + / -0.0025um, and the end faces of the upper mold plate and the lower mold plate are within 0.1 of the mirror surface.

[0019] Preferably, the heat treatment includes two raw and cold treatments.

[0020] Preferably, in the S11, precision processing step 5, a fluid polishing device is used to perform high-precision processing on the side wall of the mold.

[0021] A mold is designed, comprising an upper mold plate and a lower mold plate made by any of the above-mentioned methods for making a powder metallurgy forming inductor stamping mold.

[0022] The invention provides a method for manufacturing a powder metallurgy forming inductor stamping die and a die, and the beneficial effects are:

[0023] The imported CPM-10V mold steel is used to extend the service life, reduce the frequency of replacement of the upper and lower mold plates, improve production efficiency, and reduce production costs;

[0024] The slow wire cutting equipment used can process the forming holes with high precision, so that the specifications and finish of the forming holes meet the standards;

[0025] Through the two cold treatments in the heat treatment step, the material strength can be improved, and the service life of the upper die plate and the lower die plate can be increased;

[0026] Through the fluid polishing equipment used, the side walls of the upper mold plate and the lower mold plate can be processed with high precision, ensuring the fit between the upper mold plate and the lower mold plate, thereby improving the production quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A method for manufacturing a powder metallurgy forming inductor stamping die and a front view structural diagram of the lower die plate main body of the die proposed by the present invention;

[0028] Figure 2 The present invention provides a method for manufacturing a powder metallurgy forming inductor stamping die and a schematic rear view structure diagram of the lower die plate main body of the die. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] A method for manufacturing a powder metallurgy forming inductor stamping die comprises the following steps:

[0031] S1. Cutting step 1: Select imported CPM-10V mold steel to ensure the quality of the mold material;

[0032] S2, cutting step 2: cutting the imported CPM-10V mold steel through the cutting equipment for standby use, and performing the material division operation;

[0033] S3, preliminary processing step 1: after the material preparation, the imported CPM-10V mold steel is sent to the CNC lathe equipment for rough cutting to form a preliminary mold shape and perform preliminary shaping operations;

[0034] S4, preliminary processing step 2: sending the initially formed mold to the surface grinding equipment for rough grinding to remove surface burrs and perform the first surface grinding of the material for easy transportation and subsequent processing;

[0035] S5, preliminary processing step 3: sending the polished mold to the CNC machining center for positioning and opening operations to open the required holes on the mold;

[0036] S6, heat treatment step: heat treatment is performed on the mold after being processed by the CNC machining center to further improve the material strength;

[0037] S7, precision processing step 1: the heat-treated mold is again cut with high precision by CNC lathe equipment to perfect the main body and perform precise cutting of the main body shape;

[0038] S8, precision processing step 2: sending the cut mold to a surface grinding device for fine grinding to remove the burrs generated in the previous step;

[0039] S9, precision processing step 3: send the polished mold to the CNC machining center for secondary precision machining to perform secondary precision machining of the hole position;

[0040] S10, precision processing step 4: send the mold after secondary precision processing to the wire-feeding equipment to perform high-precision processing on the forming hole, so that the accuracy between the forming holes of the upper die plate and the lower die plate is controlled within + / -0.005um, the smoothness is between 0.3, and the precision of the forming hole is improved;

[0041] S11, precision processing step 5: send the processed mold to the surface grinding device again to perform high-precision processing on the side wall of the mold, so that the fitting clearance between the upper mold plate and the lower mold plate is controlled between + / -0.0025um, and the end faces of the upper mold plate and the lower mold plate are within 0.1 of the mirror surface, ensuring the smoothness of the side walls of the upper mold plate and the lower mold plate.

[0042] The heat treatment includes two raw and cold treatments to improve the strength of the mold.

[0043] In the S11, precision processing step 5, a fluid polishing device is used to perform high-precision processing on the side wall of the mold to improve the processing accuracy.

[0044] A mold comprises an upper mold plate and a lower mold plate manufactured by any one of the above-mentioned methods for manufacturing a powder metallurgy forming inductor stamping mold.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for manufacturing a powder metallurgy forming inductor stamping die, characterized in that: The following steps are involved: S1. Cutting step 1: Select imported CPM-10V mold steel; S2, cutting step 2: cutting the imported CPM-10V mold steel through the cutting equipment for later use; S3, preliminary processing step 1: after the material preparation, the imported CPM-10V mold steel is sent to the CNC lathe equipment for rough cutting to form the preliminary mold shape; S4, preliminary processing step 2: sending the initially formed mold to a surface grinding device for rough grinding to remove surface burrs; S5, preliminary processing step 3: sending the polished mold to the CNC machining center for positioning and opening operations; S6, heat treatment step: heat treatment of the mold after being processed by the CNC machining center; S7, precision processing step 1: the heat-treated mold is again cut with high precision by CNC lathe equipment to perfect the main body; S8, precision processing step 2: sending the cut mold to the surface grinding equipment for fine grinding; S9, precision processing step 3: sending the polished mold to the CNC machining center for secondary precision machining; S10, precision processing step 4: send the mold after secondary precision processing to the wire-feeding equipment to perform high-precision processing on the forming holes, so that the accuracy between the forming holes of the upper die plate and the lower die plate is controlled between 0-0.005um, and the finish is 0.3um; S11, precision processing step 5: the processed mold is sent to the surface grinding device again to perform high-precision processing on the side wall of the mold, so that the fitting clearance between the upper mold plate and the lower mold plate is controlled between + / -0.0025um, and the end faces of the upper mold plate and the lower mold plate are within 0.1 of the mirror surface. The heat treatment includes two raw and cold treatments.

2. The method for manufacturing a powder metallurgy forming inductor stamping die according to claim 1, characterized in that: In the S11, precision processing step 5, a fluid polishing device is used to perform high-precision processing on the side wall of the mold.

3. A mold, comprising an upper mold plate and a lower mold plate made by the method for making a powder metallurgy forming inductor stamping mold according to any one of claims 1-2.

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