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Main runner hole of external reversing valve of hydraulic knapper and machining process of main runner hole

A technology of hydraulic crushing and main flow, which is used in electric processing equipment, metal processing equipment, fluid pressure actuating devices, etc., and can solve the problems of limited area for opening flow holes, insufficient sensitivity and reliability, and difficult processing technology. , to achieve the effect of improving strength, strong corrosion resistance and good processing effect

Inactive Publication Date: 2021-05-07
JIANGSU LIBOSHI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The opening position of the flow hole of the current reversing valve is relatively fixed, and the area where the flow hole is opened is limited. The holes opened in this area are generally round holes. Refer to the attached figure 1 , this type of round hole is relatively easy to process, but its flow is limited. It is precisely because of its limited flow that it is prone to jamming when reversing, resulting in insufficient sensitivity and reliability, which cannot meet the current use. Requirements, and now in order to improve the quality and service life of the reversing valve, key components such as the valve core are made of alloy components. The hardness of such alloy components is increased, and the traditional processing technology is difficult to process

Method used

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  • Main runner hole of external reversing valve of hydraulic knapper and machining process of main runner hole
  • Main runner hole of external reversing valve of hydraulic knapper and machining process of main runner hole

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Embodiment 1

[0031] In this embodiment, a main flow hole of the external displacement reversing valve of the hydraulic breaker is proposed. The cross section of the main flow hole perpendicular to the direction of the hole depth is surrounded by n equal-length straight lines connected from head to tail, where n is positive Integer, n≥4, each straight line connection is connected through a smooth transition of an arc line.

[0032] refer to figure 2 , the reversing valve in the figure includes a valve seat 1, a spool valve 2 is installed in the valve seat 1, a spool is installed in the spool valve, the main flow hole 6 is opened on the spool, and A bonnet 4 and B are installed at one end of the valve seat 1. valve cover5.

[0033] When n=4, the main flow hole 6 is a regular square, when n=6, the main flow hole 6 is a regular hexagon, and when n=8, the main flow hole 6 is a regular octagon.

[0034] Through the above settings, the previous circular hole shape is changed, and the hole area...

Embodiment 2

[0036] A process for processing the main flow hole of an external reversing valve of a hydraulic breaker, comprising the following steps:

[0037] Step 1: According to the shape of the selected main channel hole, make a tool electrode that is consistent with the shape of the main channel hole; the tool electrode is cut and processed from a whole piece of graphite material; the center area of ​​the lower end surface of the tool electrode is opened along its length direction A working fluid conduit is installed in the through hole, and the working fluid conduit is connected with the working fluid supply mechanism on the electric discharge machine tool.

[0038] Step 2: Install the prepared tool electrode on the EDM machine tool, install the workpiece on the workbench and soak it in the working fluid;

[0039] Step 3: Start the EDM machine tool, the tool electrode discharges and gradually descends, and the main channel hole is formed by electro-erosion machining; during the tool ...

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Abstract

The invention discloses a main runner hole of an external reversing valve of a hydraulic knapper and a machining process of the main runner hole. The section, perpendicular to the depth direction of the main runner hole, of the main runner hole is defined by n equal-length straight lines which are connected end to end, n is a positive integer and is larger than or equal to 4, and the connecting positions of all the straight lines are in smooth transition connection through arc lines. According to the main runner hole, compared with a traditional main runner hole, the flow of the reversing valve is increased, the jamming phenomenon during reversing of the reversing valve is reduced, the reversing sensitivity and reliability of working of the reversing valve are improved, main runner hole forming machining can be carried out on an existing alloy component, the machining effect is good, forming is stable, and the main runner hole is high in erosion resistance and long in service life.

Description

technical field [0001] The invention relates to the field of flow holes of reversing valves, in particular to a main flow hole of an externally displaced reversing valve of a hydraulic breaker and a processing technology thereof. Background technique [0002] The hydraulic breaker is a new type of hydraulic impact machine. It uses the hydraulic pump as the power source and the oil pressure as the power. When working, it relies on the high-pressure oil output from the working machine to realize the piston of the breaker in the cylinder through the rotation of the hydraulic breaker reversing valve. The high-speed reciprocating motion in the machine strikes the drill rod, and the drill tip crushes the rock from the surface. Therefore, in the work of the hydraulic breaker, the reversing valve occupies the leading control role, and its reversing sensitivity and reliability directly affect whether the hydraulic breaker can work smoothly and improve efficiency. [0003] The openin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H9/14B23H11/00F15B13/02
CPCB23H9/14B23H11/00F15B13/02
Inventor 张春生
Owner JIANGSU LIBOSHI MACHINERY