A valve body sealing boss end face processing device and method in a filter regulator assembly

Abstract

The application belongs to the technical field of valve body processing, and particularly relates to a valve body sealing boss end face processing device and method in a filter regulator assembly. The device comprises a core rod (9), the middle of the core rod (9) is a holding section (91), the two ends of the holding section (91) are respectively a grinding section (92) and a punching section (93), the punching section (93) is coaxial with the holding section (91), the grinding section (92) is designed eccentrically relative to the axis of the holding section (91), the end face of the grinding section (92) has a set roughness and flatness, the end face of the punching section (93) has a spherical protrusion (931) in the center, and the spherical protrusion (931) can extrude the inner wall of the annular sealing boss (84) at the inlet of the valve body communication hole (83). The application processes the annular sealing boss of the valve body through the end face processing device, so that the valve body plays a role in sealing and adjusting the pressure balance point, and the pressure reduction reliability and service life of the filter regulator assembly are improved.

Description

Technical Field

[0001] This application belongs to the field of valve body processing technology, specifically relating to a device and method for processing the end face of the valve body sealing boss in a filter regulator assembly. Background Technology

[0002] The filter regulator assembly is an air pressure reducing valve with filtering function, installed on the transmission of heavy-duty vehicles. It is used in conjunction with the mechanical control valve and the auxiliary cylinder assembly. The air supply in heavy-duty vehicles is filtered, regulated, and pressure-reduced by the filter regulator assembly to provide a stable supply of clean compressed air to the mechanical control valve.

[0003] like Figure 1 and Figure 2 As shown, the filter adjuster assembly includes a valve body 8, which forms multiple interconnected cavities. It includes a first receiving groove 81 communicating with the inlet and a second receiving groove 82 communicating with the outlet of the filter adjuster assembly. The bottoms of the first receiving groove 81 and the second receiving groove 82 are connected through a connecting hole 83. The inner diameter of the first receiving groove 81 is larger than the inner diameter of the connecting hole 83, and the two are coaxial. The valve body 8 forms an annular sealing boss 84 extending into the first receiving groove 81 on the periphery of the connecting hole 83. The valve 4 disposed in the first receiving groove 81 has a rubber end face that presses against the annular sealing boss 84 to seal the connecting hole 83. A first spring 3 that compresses the right end of the valve 4 is also disposed in the first receiving groove 81. The first spring 3 is limited by the spring support plate 2. One end of the filter element 1 compresses the spring support plate 2, and the other end is blocked by the port of the installation port. At the second receiving groove 82, the piston 5 is driven by the second spring 6 to squeeze the left end of the valve 4. The second spring 6 is encapsulated inside the valve body 8 by the spring cover 7. The spring cover 7 is threadedly connected to the inner wall of the valve body 8 to adjust the elastic force of the second spring 6.

[0004] In the filtering, regulating, and pressure-reducing system structure of the filter adjuster assembly, when the filter adjuster assembly adjusts the inlet pressure to zero, the valve 4 and the valve body 8 are sealed and fitted together without gaps. When the filter adjuster assembly adjusts the outlet pressure (working), the valve 4 and the valve body 8 control the opening of the valve 4 inside the valve body 8 to regulate the flow rate of the inlet medium and reduce the pressure of the medium. At the same time, the opening of the valve 4 is adjusted by the elastic pressure of the second spring 6 inside the filter adjuster assembly, so that the elastic force of the second spring 6 and the force of the inlet air pressure on the piston 5 are balanced, so that the outlet pressure of the filter adjuster assembly remains constant within a certain error range.

[0005] like Figure 2As shown, due to the precision casting of the internal structure of the valve body 8, and the position of the annular sealing boss 84 end face is in the center of the valve body 8 structure, and the shape is relatively complex, because the annular sealing boss end face is simply surface machined by modern machining center and other equipment, there is no effective means to ensure the machining quality requirements of the surface roughness and flatness of the annular sealing boss end face, and it cannot be measured, resulting in the defect that the valve body 8 and the valve 4 cannot be matched and flat when they contact at the sealing boss end face during the assembly process of the filter regulator assembly. The adjustment function of the adjusting device of the valve 4 is lost, and the outlet pressure value always fluctuates up and down within the specified range every time the pressure reducing valve is opened, and the stable state cannot be adjusted. The adjustment function is lost, and the reliability of the pressure reducing valve and the service life of the filter regulator assembly are reduced. SUMMARY

[0006] In order to solve the above problems, the application provides a valve body sealing boss end face machining device and method in a filter regulator assembly, which can precisely and effectively machine the annular sealing boss end face, avoid the problem that the valve body and the valve cannot be matched when they contact at the sealing boss end face, and ensure effective fitting.

[0007] The first aspect of the application provides a valve body sealing boss end face machining device in a filter regulator assembly, which comprises a core rod, the middle of the core rod is a holding section, the two ends of the holding section are a grinding section and a punching section, the punching section is coaxial with the holding section, the grinding section is offset from the axis of the holding section by a certain distance, the end face of the grinding section has a certain roughness and flatness, the center of the end face of the punching section has a spherical protrusion, the spherical protrusion is transitioned to the edge of the end face of the punching section through an inclined surface, and the spherical protrusion can extrude the inner wall of the annular sealing boss at the inlet of the communication hole.

[0008] Preferably, the grinding section is eccentric to the holding section by 1.2 mm.

[0009] Preferably, the roughness of the end face of the grinding section is 0.4, and the flatness is 0.015.

[0010] Preferably, the holding section side wall is provided with a mounting hole for connecting the pin shaft of the load loading mechanism.

[0011] The second aspect of the application provides a valve body sealing boss end face machining method in a filter regulator assembly, which machines the valve body sealing boss end face by using the valve body sealing boss end face machining device in a filter regulator assembly as described above, and the machining method comprises:

[0012] Step S1: Connect the retaining section of the mandrel to the rotating mechanism, and make the retaining section coaxial with the connecting hole, so that the grinding section extends into the first receiving groove;

[0013] Step S2: Place the end of the grinding section against the annular sealing boss, and rotate the holding section to drive the grinding section to move circumferentially along the annular sealing boss to grind the annular sealing boss;

[0014] Step S3: Connect the retaining section of the mandrel to the axial telescopic mechanism, and make the retaining section coaxial with the connecting hole, so that the punching section extends into the first receiving groove.

[0015] Step S4: Align the center of the end of the extrusion section with the center of the annular sealing boss, and drive the extrusion section to extrude the inner wall of the annular sealing boss through the reciprocating motion of the mandrel.

[0016] Preferably, step S2 further includes applying polishing paste to the end of the polishing section.

[0017] This application uses an end-face machining device to process the annular sealing boss of the valve body, enabling the valve body to play a role in sealing and regulating the pressure balance point, thereby improving the pressure reduction reliability and service life of the filter regulator assembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the filter regulator assembly.

[0019] Figure 2 This is a schematic diagram showing the connection between the annular sealing boss and the valve in the filter regulator assembly structure.

[0020] Figure 3 This is a schematic diagram of the mandrel structure of a preferred embodiment of the valve body sealing boss end face machining device in the filter adjuster assembly of this application.

[0021] Figure 4 This application Figure 3 A schematic diagram of the mandrel grinding annular sealing boss in the embodiment shown.

[0022] Figure 5 This application Figure 3 A schematic diagram of the mandrel extrusion annular sealing boss in the embodiment shown.

[0023] Among them, 1-filter element, 2-spring support plate, 3-first spring, 4-valve, 5-piston, 6-second spring, 7-spring cover, 8-valve body, 81-first receiving groove, 82-second receiving groove, 83-connecting hole, 84-annular sealing boss, 9-core rod, 91-holding section, 92-grinding section, 93-extruded section, 931-spherical protrusion, 932-sloping surface. Detailed Implementation

[0024] For the purpose of the embodiments of the present application, the technical solutions and advantages, the technical solutions in the embodiments of the present application will be described in more detail below in combination with the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.

[0025] The first aspect of the present application provides a valve body sealing boss end face processing device in a filter regulator assembly, as shown in Figure 3 The valve body sealing boss end face processing device includes a core rod 9, the middle of the core rod 9 is a holding section 91, the two ends of the holding section 91 are a grinding section 92 and a punching section 93 respectively, the punching section 93 is coaxial with the holding section 91, the grinding section 92 is offset by a set distance relative to the axis of the holding section 91, the end face of the grinding section 92 has a set roughness and flatness, the center of the end face of the punching section 93 has a spherical protrusion 931, the spherical protrusion 931 transitions to the end face edge of the punching section 93 through a bevel 932, and the spherical protrusion 931 can extrude the inner wall of the annular sealing boss 84 of the valve body at the inlet of the communication hole 83.

[0026] The present application takes the grinding section 92 and the punching section 93 as the two end structures of the holding section 91, which are integrally formed with the holding section 91, ensuring the perpendicularity requirement of the annular sealing boss end face of the valve body 8, avoiding the shape deviation affecting the processing, improving the production efficiency, and the core rod 9 is processed from GCr15 bearing steel, having higher and more uniform hardness and wear resistance.

[0027] In some optional embodiments, the grinding section 92 is eccentric to the holding section 91 by 1.2 mm. Through the eccentric design, when the core rod 9 rotates, the grinding section 92 makes circular motion, so as to grind along the annular direction of the annular sealing boss end face.

[0028] In some optional embodiments, in order to make the surface flatness and roughness of the sealing boss end face of the valve body 8 after processing meet the requirements, the end face of the grinding section 92 must be a wear-resistant smooth plane, as shown in Figure 2As shown in the surface roughness and flatness requirements, the end face roughness of the grinding section 92 is 0.4, and the flatness is 0.015. Based on this, an annular sealing boss with a surface roughness Ra0.4, flatness 0.015mm, and an annular width of 1.8mm is formed. This boss is a spherical curved surface with a slightly lower center.

[0029] In some optional embodiments, the retaining section 91 has mounting holes on its sidewall for connecting the pin of the load loading mechanism. In alternative embodiments, the retaining section 91 can also be machined with a clamping plane or other structure so that the load loading mechanism can be connected to it. The load loading mechanism of this application mainly consists of a rotating mechanism and a unidirectional telescopic mechanism. The rotating mechanism drives the mandrel 9 to rotate, and the unidirectional telescopic mechanism drives the mandrel 9 to reciprocate along the axial direction.

[0030] The second aspect of this application provides a method for machining the end face of a valve body sealing boss in a filter regulator assembly. The method involves machining the end face of the valve body sealing boss using the aforementioned machining device. The machining method includes:

[0031] Step S1: Connect the retaining section 91 of the mandrel 9 to the rotating mechanism, and make the retaining section 91 coaxial with the connecting hole 83, so that the grinding section 92 extends into the first receiving groove 81;

[0032] Step S2: Place the end of the grinding section 92 against the annular sealing boss 84, and rotate the retaining section 91 to drive the grinding section 92 to move circumferentially along the annular sealing boss 84 to grind the annular sealing boss 84.

[0033] Step S3: Connect the retaining section 91 of the mandrel 9 to the axial telescopic mechanism, and make the retaining section 91 coaxial with the connecting hole 83, so that the punching section 93 extends into the first receiving groove 81.

[0034] Step S4: Align the center of the end of the punching section 93 with the center of the annular sealing boss 84, and drive the punching section 93 to punch the inner wall of the annular sealing boss 84 through the reciprocating motion of the mandrel 9.

[0035] In step S2 of this application, as follows Figure 4 As shown, the annular sealing boss end face of the valve body 8 is ground by rotating a dual-purpose grinding and stamping mandrel on an eccentric shaft with an eccentricity of 1.2mm, so that the surface flatness and roughness of the annular sealing boss end face of the valve body 8 meet the requirements after machining. Then in step S4, as... Figure 5As shown, the end face of the punching and extruding section 93 is a punching and extruding arc face, the annular sealing boss end face is punched and extruded, the core rod 9 is driven to reciprocate up and down by the driving mechanism, the punching and extruding section 93 of the core rod 9 impacts the annular sealing boss, thereby forming a sealing annular plane, and the end face structure of the punching and extruding section 93 can form a complete, smooth, and compact micro annular plane on the end face of the annular sealing boss of the valve body 8.

[0036] In some optional embodiments, step S2 further includes smearing grinding paste on the end of the grinding section 92 to improve grinding efficiency. In the present embodiment, white corundum grinding paste with W20 abrasive particle size is generally used for grinding, and in alternative embodiments, the grinding paste can be mixed with kerosene and then used for grinding to improve grinding efficiency and effect.

[0037] The present application processes the annular sealing boss of the valve body by the end face processing device, so that the valve body plays a role in sealing and adjusting the pressure balance point, and improves the pressure reduction reliability and service life of the filter regulator assembly.

[0038] Although the present application has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application are within the scope of the present application.

Claims

1. A machining device for the end face of the valve body sealing boss in a filter regulator assembly, wherein, The valve body (8) of the filter regulator assembly includes a first receiving groove (81) communicating with the inlet of the filter regulator assembly and a second receiving groove (82) communicating with the outlet of the filter regulator assembly. The bottoms of the first receiving groove (81) and the second receiving groove (82) are connected through a connecting hole (83). The inner diameter of the first receiving groove (81) is larger than the inner diameter of the connecting hole (83), and the two are coaxial. The valve body (8) forms an annular sealing boss (84) extending into the first receiving groove (81) on the periphery of the connecting hole (83). The valve (4) provided in the first receiving groove (81) has a rubber end face that is pressed against the annular sealing boss (84) for sealing the connecting hole (83). The valve body sealing boss end face is characterized in that the valve body sealing boss end face is The surface processing device includes a mandrel (9), the middle of which is a holding section (91), and the two ends of the holding section (91) are a grinding section (92) and a punching section (93), respectively. The punching section (93) is coaxial with the holding section (91). The grinding section (92) is offset from the axis of the holding section (91) by a set distance. The end face of the grinding section (92) has a set roughness and flatness. The center of the end face of the punching section (93) has a spherical protrusion (931). The spherical protrusion (931) transitions to the edge of the end face of the punching section (93) through the inclined surface (932). The spherical protrusion (931) can squeeze the inner wall of the annular sealing boss (84) at the entrance of the connecting hole (83).

2. The valve body sealing boss end face machining device in the filter adjuster assembly as described in claim 1, characterized in that, The grinding section (92) is eccentrically 1.2 mm relative to the holding section (91).

3. The valve body sealing boss end face machining device in the filter adjuster assembly as described in claim 1, characterized in that, The end face roughness of the grinding section (92) is 0.4 and the flatness is 0.

015.

4. The valve body sealing boss end face machining device in the filter adjuster assembly as described in claim 1, characterized in that, The retaining section (91) has mounting holes on its sidewall for connecting the pin of the load loading mechanism.

5. A method for machining the end face of the valve body sealing boss in a filter regulator assembly, characterized in that, The valve body sealing boss end face is machined using the valve body sealing boss end face machining device in the filter adjuster assembly as described in claim 1, wherein the machining method includes: Step S1: Connect the retaining section (91) of the mandrel (9) to the rotating mechanism, and make the retaining section (91) coaxial with the connecting hole (83), so that the grinding section (92) extends into the first receiving groove (81); Step S2: Place the end of the grinding section (92) against the annular sealing boss (84), and rotate the retaining section (91) to drive the grinding section (92) to move circumferentially along the annular sealing boss (84) to grind the annular sealing boss (84). Step S3: Connect the retaining section (91) of the mandrel (9) to the axial telescopic mechanism, and make the retaining section (91) coaxial with the connecting hole (83), so that the punching section (93) extends into the first receiving groove (81); Step S4: Align the center of the end of the stamping section (93) with the center of the annular sealing boss (84), and drive the stamping section (93) to stamp the inner wall of the annular sealing boss (84) through the reciprocating motion of the mandrel (9).

6. The method for machining the valve body sealing boss end face in the filter regulator assembly as described in claim 5, characterized in that, Before step S2, a further step is to apply a polishing paste to the end of the polishing section (92).

Images