A method for machining a throttle valve body mold insert

Abstract

This invention belongs to the field of automotive parts die-casting mold manufacturing technology, and discloses a processing method for a throttle valve body mold insert, including processing equipment and a clamping device for fixing the workpiece blank; the processing method includes rough machining and finish machining of the mold insert. This application has made a reasonable and orderly standardized design for the processing of the mold insert, and retains a reasonable machining allowance in the process, which can effectively avoid phenomena such as hole out-of-roundness and black skin in subsequent processing, ensuring product quality, solving the long-standing technical problem of frequent positional deviations in the cavity during the manufacturing process, and improving the product qualification rate of throttle valve bodies, thereby improving the overall economic benefits.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts die-casting mold manufacturing technology, specifically relating to a processing method for a throttle valve body mold insert. Background Technology

[0002] In the manufacturing process of die-casting molds for throttle valve bodies, the dimensions of mold inserts produced using traditional manufacturing processes cannot be guaranteed, leading to frequent quality issues in the die-cast parts. Misalignment between the hole positions and reference positions on various surfaces of the die-cast part results in insufficient machining allowance for the holes, causing defects such as out-of-roundness and black rind after machining, severely impacting product quality. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this invention is to provide a method for processing a throttle valve body mold insert.

[0004] To achieve its objectives, the present invention employs the following technical solution:

[0005] A method for machining a throttle valve body mold insert includes equipment for machining and a clamping device for fixing a workpiece blank.

[0006] The processing method includes the following steps:

[0007] Rough machining of mold inserts:

[0008] OP10, Material Preparation;

[0009] OP20, Mill the four sides, top surface, and fixed surface of the mold insert;

[0010] OP30, the four sides, top surface, and fixing surface of the rough grinding mold insert;

[0011] OP40, process mold inserts and form connecting threaded holes and water holes;

[0012] OP50, process mold inserts and form core positioning holes, positioning grooves, forming surfaces, and cavity mating surfaces;

[0013] OP60, perform heat treatment on the mold insert;

[0014] Finishing of mold inserts:

[0015] OP70, precision ground mold insert, including its four sides and fixing surface;

[0016] OP80, wire EDM machining of mold insert core holes and guide grooves;

[0017] OP90, precision mill the forming surface, cavity mating surface, and four sides of the mold insert, and then machine the positioning table hole and positioning groove at the fixing surface of the mold insert;

[0018] OP100, uses electrical discharge machining to process shaped parts that cannot be machined by the high-speed milling described above;

[0019] OP110, fitter's polishing and assembly;

[0020] OP120, Inspect the mold inserts.

[0021] Preferably, the equipment in step OP10 is a CNC sawing machine, the equipment in step OP20 is a vertical milling machine, the equipment in steps OP30 and OP70 is a surface grinder, the equipment in steps OP40 and OP50 is a machining center, the equipment in step OP60 is a heat treatment furnace, the equipment in step OP90 is a high-speed CNC milling machine, the equipment in step OP100 is an electrical discharge machine, and the equipment in step OP120 is a coordinate measuring machine.

[0022] Preferably, in step OP60, the heat treatment is quenching and tempering to HRC46-50.

[0023] Preferably, in step OP20, the machining allowance of the mold insert is 0.7mm, and in step OP30, the machining allowance of the mold insert is 0.5mm, and the perpendicularity and parallelism of each machined surface are ≤0.05.

[0024] Preferably, in step OP50, the machining depth allowance of the core positioning hole is 0.8mm, the single-sided allowance of the core mating section is 1mm, the machining allowance of the cavity mating surface and the forming surface is 0.8mm, and the machining allowance of the positioning groove is 0.8mm.

[0025] Preferably, the core positioning hole includes a core mating hole and a core clearance hole.

[0026] Preferably, in step OP70, the machining allowance for the four sides of the mold insert is 0.3mm, and the perpendicularity and parallelism of each machined surface are ≤0.015.

[0027] Preferably, in step OP90, the clamping device includes an auxiliary fixing plate, which is used to fasten the mold insert and calibrate the reference surface of the mold insert. The core hole processed by wire cutting is checked, and one of them is set as the reference hole. Using this as the center, the forming surface, cavity mating surface, and four sides of the mold insert are precision milled. Then, the positioning table hole and positioning groove at the fixing surface of the mold insert are machined in reverse with the same reference.

[0028] Preferably, in step OP120, the dimensions and positions of the positioning grooves of the mold inserts, the position dimensions and apertures of each core mating section, the dimensions of the cavity mating surfaces, and the shape of the mold inserts are checked according to the reference.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] The processing method for the throttle valve body mold insert proposed in this invention solves the long-standing technical problem of frequent positional errors in the manufacturing process of die-casting molds by rationally arranging the processing sequence and applying the manufacturing process, thereby improving the product qualification rate and achieving good economic benefits. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a top view of the mold insert of the present invention;

[0033] Figure 2 This is a side view of the mold insert of the present invention;

[0034] Figure 3 This is a bottom view of the mold insert of the present invention;

[0035] Figure 4 This is a cross-sectional view of the mold insert of the present invention from a side view direction;

[0036] Figure 5 This is a bottom view of the mold insert after processing according to the present invention;

[0037] Figure 6 This is a cross-sectional view of the mold insert of the present invention from another side view direction;

[0038] Figure 7 This is a perspective view of the present invention.

[0039] Figure 8 This is a schematic diagram of the processing method of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-Positioning groove, 2-Forming surface, 3-Cavity mating surface, 4-Guide groove, 5-Core hole. Detailed Implementation

[0042] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features of the present invention can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0044] Reference Figures 1 to 8 This invention provides a method for processing a throttle valve body mold insert, including equipment for processing and a clamping device for fixing a workpiece blank;

[0045] The processing method includes the following steps:

[0046] Rough machining of mold inserts:

[0047] OP10, Material Preparation;

[0048] OP20, Mill the four sides, top surface and fixed surface of the mold insert; The length, width and height dimensions of the mold insert are 131.8*130*150mm;

[0049] OP30, the four sides, top surface, and fixing surface of the rough grinding mold insert;

[0050] OP40, Machining mold inserts and forming connecting threaded holes and water holes, see [link / reference]. Figure 4 The number of connecting threaded holes is 4, i.e. 4-M10, and the number of water holes is 2, i.e. 2-Φ10;

[0051] OP50, process mold inserts and form core positioning holes, positioning grooves 1, forming surfaces 2, and cavity mating surfaces 3;

[0052] OP60, perform heat treatment on the mold insert;

[0053] Finishing of mold inserts:

[0054] OP70, precision ground mold insert, including its four sides and fixing surface;

[0055] OP80, the guide groove 4 of the wire EDM die insert and the core positioning hole forming the core hole 5;

[0056] OP90, precision mill the forming surface, cavity mating surface, and four sides of the mold insert, and then machine the positioning table hole and positioning groove at the fixing surface of the mold insert;

[0057] OP100, uses electrical discharge machining to process shaped parts that cannot be machined by the high-speed milling described above;

[0058] OP110, fitter's polishing and assembly;

[0059] OP120, Check the dimensions and positions of the positioning grooves of the mold inserts, the position dimensions and hole diameters of each core mating section, the dimensions of the cavity mating surfaces, and the shape of the mold inserts according to the reference.

[0060] Specifically, the equipment in step OP10 is a CNC sawing machine, the equipment in step OP20 is a CNC milling machine, the equipment in steps OP30 and OP70 is a surface grinder, the equipment in steps OP40 and OP50 is a machining center, the equipment in step OP60 is a heat treatment furnace, the equipment in step OP90 is a high-speed CNC milling machine, the equipment in step OP100 is an EDM machine, and the equipment in step OP120 is a coordinate measuring machine.

[0061] Specifically, in step OP60, the heat treatment is quenching and tempering to HRC46-50.

[0062] Specifically, in step OP20, the machining allowance for the mold insert is 0.7mm, and in step OP30, the machining allowance for the mold insert is 0.5mm, and the perpendicularity and parallelism of each machined surface are ≤0.05.

[0063] Specifically, in step OP50, the machining depth allowance for the core positioning hole is 0.8mm, the single-sided allowance for the core mating section is 1mm, the machining allowance for the cavity mating surface and the forming surface is 0.8mm, and the machining allowance for the positioning groove is 0.8mm.

[0064] Specifically, the core positioning holes include core mating holes and core clearance holes.

[0065] Specifically, in step OP70, the machining allowance for the four sides of the mold insert is 0.3mm, and the perpendicularity and parallelism of each machined surface are ≤0.015.

[0066] Specifically, in step OP90, the fixture device includes an auxiliary fixing plate. The mold insert is secured by the auxiliary fixing plate, and the reference surface of the mold insert is calibrated. The core hole processed by wire cutting is checked, and one of them is set as the reference hole. Using this as the center, the forming surface, cavity mating surface, and four sides of the mold insert are precision milled. Then, the mold insert is clamped in the opposite direction and the positioning platform hole and positioning groove at the fixing surface of the mold insert are machined using the same reference. Setting a reference hole solves the machining problem caused by frequent positional errors in the manufacturing process of die-casting molds.

[0067] This embodiment uses this process flow for production, where the machining of the insert forming surface, insert mating section, and four sides of the base, which affect the hole position accuracy, is completed separately by a high-speed CNC milling machine. This not only reduces the impact of human factors on workpiece quality but also eliminates some of the cumulative errors on workpiece accuracy. After hole position inspection of the machined inserts, the accuracy fully meets the technical specifications, thus enabling the mold manufacturing work to proceed smoothly and greatly improving the manufacturing quality of the mold.

[0068] The processing method of the throttle valve body mold insert in this embodiment has a reasonable and orderly standardized design for the processing of the mold insert. It retains a reasonable processing allowance in the process, which can effectively avoid phenomena such as hole out-of-roundness and black skin in subsequent processing, thus ensuring product quality. It solves the long-standing technical problem of frequent positional deviations in the cavity during the manufacturing process, and improves the product qualification rate of the throttle valve body, thereby improving the overall economic benefits.

[0069] It should be noted that other aspects of the processing method for the throttle valve body mold insert disclosed in this invention can be found in the prior art, and will not be repeated here.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for processing a throttle valve body mold insert, characterized in that, This includes equipment for processing and clamping devices for holding workpiece blanks; The processing method includes the following steps: Rough machining of mold inserts: OP10, Material Preparation; OP20, Mill the four sides, top surface, and fixed surface of the mold insert; OP30, the four sides, top surface, and fixing surface of the rough grinding mold insert; OP40, process mold inserts and form connecting threaded holes and water holes; OP50, process mold inserts and form core positioning holes, positioning grooves, forming surfaces, and cavity mating surfaces; OP60, perform heat treatment on the mold insert; Finishing of mold inserts: OP70, precision ground mold insert, including its four sides and fixing surface; OP80, wire EDM machining of mold insert core holes and guide grooves; OP90: Mill the forming surface, cavity mating surface, and four sides of the mold insert, and then machine the positioning table hole and positioning groove at the fixing surface of the mold insert; the fixture device includes an auxiliary fixture fixing plate, which is used to fasten the mold insert and calibrate the reference surface of the mold insert, check the core hole processed by wire cutting, set one of them as the reference hole and use it as the center, mill the forming surface, cavity mating surface, and four sides of the mold insert, and then reverse the clamping and machine the positioning table hole and positioning groove at the fixing surface of the mold insert with the same reference. OP100: Use electrical discharge machining to process the formed parts that cannot be processed by step OP90 above; OP110, fitter's polishing and assembly; OP120, Inspect the mold inserts.

2. The processing method of the throttle valve body mold insert according to claim 1, characterized in that, The equipment in step OP10 is a CNC sawing machine, the equipment in step OP20 is a vertical milling machine, the equipment in steps OP30 and OP70 is a surface grinder, the equipment in steps OP40 and OP50 is a machining center, the equipment in step OP60 is a heat treatment furnace, the equipment in step OP90 is a high-speed CNC milling machine, the equipment in step OP100 is an EDM machine, and the equipment in step OP120 is a coordinate measuring machine.

3. The processing method of the throttle valve body mold insert according to claim 1, characterized in that, In step OP60, the heat treatment is quenching and tempering to HRC46-50.

4. The processing method of the throttle valve body mold insert according to claim 1, characterized in that, In step OP20, the machining allowance of the mold insert is 0.7mm, and in step OP30, the machining allowance of the mold insert is 0.5mm, and the perpendicularity and parallelism of each machined surface are ≤0.

05.

5. The processing method of the throttle valve body mold insert according to claim 1, characterized in that, In step OP50, the machining depth allowance of the core positioning hole is 0.8mm, the single-sided allowance of the core mating section is 1mm, the machining allowance of the cavity mating surface and the forming surface is 0.8mm, and the machining allowance of the positioning groove is 0.8mm.

6. The processing method of the throttle valve body mold insert according to claim 5, characterized in that, The core positioning hole includes a core mating hole and a core clearance hole.

7. The processing method of the throttle valve body mold insert according to claim 1, characterized in that, In step OP70, the machining allowance for the four sides of the mold insert is 0.3mm, and the perpendicularity and parallelism of each machined surface are ≤0.

015.

8. The processing method of the throttle valve body mold insert according to claim 1, characterized in that, In step OP120, the dimensions and positions of the positioning grooves of the mold inserts, the position dimensions and hole diameters of each core mating section, the dimensions of the cavity mating surfaces, and the shape of the mold inserts are checked according to the reference.

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