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Casting method and system suitable for integral multi-way valve based on 3D printing

A 3D printing, integrated technology, applied in casting molding equipment, casting molds, casting mold components, etc., can solve problems such as multiple revisions of unfavorable models, restrictions on rapid replacement of large integrated hydraulic multi-way valves, and difficulty in casting. , to ensure the surface quality and quality stability, realize the effect of industrial application, and reduce the cost of trial production

Pending Publication Date: 2020-07-31
JIANGSU XCMG CONSTR MASCH RES INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Because the main valve hole of the integral hydraulic multi-way valve body is slender, the internal oil passage is complicated, there are many suspended structures, oil grooves, cross-sectional shapes and sizes are different, the casting is difficult, and the casting success rate of the integral hydraulic multi-way valve is relatively low. Low
At present, the manufacture of large integral hydraulic multi-way valves usually adopts the traditional sand casting method. According to the design model, the metal mold is first manufactured, and then the metal mold is used to manufacture the sand mold, and finally the pouring is completed to obtain the hydraulic valve blank. The traditional manufacturing method, mold manufacturing The cycle is long and the mold cost is high, which is not conducive to multiple revisions of the model in the design stage, which limits the rapid replacement of large integral hydraulic multi-way valves
[0004] At present, sand mold 3D printing has a high success rate in the application of aluminum alloy castings and thick and large parts, but the strength of sand molds quickly manufactured based on sand mold 3D printing technology is far lower than that of sand molds manufactured by transmission molds, especially in the case of complex internal structures, small structures, Large-scale integral hydraulic multi-way valves with many features such as suspension structures generally have problems such as low rapid casting success rate and poor molding quality. During the pouring process, casting defects such as broken cores and seams are prone to occur. application requirements

Method used

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  • Casting method and system suitable for integral multi-way valve based on 3D printing
  • Casting method and system suitable for integral multi-way valve based on 3D printing
  • Casting method and system suitable for integral multi-way valve based on 3D printing

Examples

Experimental program
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Effect test

Embodiment 1

[0052] This embodiment is a casting method suitable for integral multi-way valves based on 3D printing, including:

[0053] Determine the structural parameters of the valve to be cast;

[0054] Take the direction perpendicular to the axial direction of the main valve hole as the height direction to determine the height L of the valve body of the valve to be cast;

[0055] Determine the number of layers of the gate according to the height L of the valve body;

[0056] According to the structural parameters of the valve to be cast, determine the position of each ingate of each layer, so that all ingates are located on the same side of the valve body to be cast;

[0057] According to the structural parameters of the valve to be cast, arrange the gate models of the corresponding layers and positions;

[0058] Corresponding to the ingate of each layer, the runner model connected with the ingate is respectively arranged;

[0059] Set up the riser model and the sprue model connect...

Embodiment 1-1

[0065] On the basis of Embodiment 1, this embodiment takes the valve to be cast as an integral hydraulic multi-way valve as an example to introduce the method in detail.

[0066] In this embodiment, after determining the structural parameters of the valve to be cast, the body model 1 of the integral multi-way valve to be cast can be generated, which facilitates more intuitive setting of the ingate, runner, sprue, riser, etc. location, reference figure 1 and figure 2 shown.

[0067] The integral multi-way valve casting method also includes:

[0068] Set a through-type exhaust channel in the sand core corresponding to the main valve hole; for other valve holes except the main valve hole, set a follow-up exhaust hole in the corresponding sand core that needs to be connected to the periphery of the sand mold. That is, the path of the exhaust hole is set along the central path of the valve hole. The setting of the exhaust channel and the exhaust hole can improve the exhaust ef...

Embodiment 2

[0075] Based on the same inventive concept as Example 1 and Example 1-1, this example introduces a casting system suitable for integral multi-way valves, including a sand mold body, a sprue 2, a runner 3, and an ingate 4 and riser 5;

[0076] Take the direction perpendicular to the axial direction of the main valve hole sand core as the height direction of the sand mold body;

[0077] The sprue 2, runner 3 and ingate 4 are arranged on one side of the sand mold body; there are multiple runners along the height direction of the sand mold body, and a plurality of inner sprues are arranged in the extending direction of each runner. Each runner is connected to the sand mold body through the multiple inner gates; the multiple runners are respectively connected to the sprue, and the riser 5 is arranged on the top of the sand mold body.

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Abstract

The invention discloses a casting method and system suitable for an integral multi-way valve based on 3D printing, and belongs to the technical field of valve casting. According to the casting methodand system, inner sprues of multiple layers, multiple cross gates connected with the inner sprues of all the layers and a sprue connected with the multiple cross gates are determined according to thestructural parameters of the to-be-cast integral multi-way valve, and the integral sand mold is printed through 3D printing technology, so that the multi-layer combined type pouring casting method andthe corresponding casting system are achieved, the influences of gravity, scouring force and the like in the liquid mold filling process can be dispersed and balanced, and the casting defects of sandcore breakage, internal defect flashes, main valve hole bending and the like are reduced. And the consistency between the integral sand molds through 3D printing is good, no bonding gap exists in theintegral sand molds, the quality stability and the surface quality of a valve body casting obtained after pouring can be guaranteed, meanwhile, rapid casting of the integral hydraulic valve can be achieved, the integral hydraulic valve is suitable for batch and normalized manufacturing, and rapid upgrading of large-scale integral hydraulic multi-way valve products is better supported.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing of engineering machinery, in particular to a casting method and system based on 3D printing and suitable for integral multi-way valves. Background technique [0002] The large integral hydraulic multi-way valve is the core control element of construction machinery. It is located between the pump and the actuator and is used to control the flow and direction of the hydraulic oil, thereby centrally controlling the movement direction and speed of the actuator. It is widely used in engineering Machinery, mining machinery, port machinery and other fields. The performance of the large integral multi-way valve directly affects the overall working performance of the product, and affects the reputation and sales of the whole product, which shows its importance. Domestic large-scale integrated hydraulic multi-way valves mainly rely on imports, which seriously restricts the development of dom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C9/08B22C9/24B33Y10/00B33Y50/00
CPCB22C9/02B22C9/082B22C9/088B22C9/24B33Y10/00B33Y50/00B22C9/10B22C3/00B33Y80/00
Inventor 薄夫祥何冰张旺
Owner JIANGSU XCMG CONSTR MASCH RES INST LTD
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