阅读说明：本技术 膨胀阀的加工方法及膨胀阀 (Expansion valve processing method and expansion valve ) 是由 不公告发明人 于 2019-07-15 设计创作，主要内容包括：本发明公开了一种膨胀阀的加工方法及膨胀阀,包括：将所述毛坯的第一侧部进行钻孔,形成第一连接孔、第二连接孔,第二连接孔与第一腔连通；将阀体毛坯的第二侧部进行钻孔,形成第三连接孔,第三连接孔与第一腔连通,形成第四连接孔,第四连接孔与第二腔连通；将阀体毛坯的第三侧部进行钻孔,形成第三腔,第三腔与第一连接孔连通,电磁阀阀芯的至少部分位于第三腔；第三腔中心钻有贯穿孔；将阀体毛坯形成第三腔的底壁钻孔,形成与第一连接孔连通的第二贯穿孔,第一贯穿孔和第二贯穿孔中的至少其中一个是斜孔。(The invention discloses a processing method of expansion valves and an expansion valve, which comprises the steps of drilling the side part of a blank to form a connection hole and a second connection hole, wherein the second connection hole is communicated with a cavity, drilling the second side part of a valve body blank to form a third connection hole, wherein the third connection hole is communicated with a cavity to form a fourth connection hole, and the fourth connection hole is communicated with a second cavity, drilling the third side part of the valve body blank to form a third cavity, wherein the third cavity is communicated with a connection hole, at least part of a valve core of a solenoid valve is positioned in the third cavity, a through hole is drilled in the center of the third cavity, drilling the bottom wall of the valve body blank to form a second through hole communicated with an connection hole, and at least of the through hole and the second through hole are oblique holes.)

The processing method of the expansion valves comprises a power head assembly, an adjusting seat assembly and a solenoid valve spool, and is characterized in that the processing method of the valve body comprises the following steps:

drilling an end of the valve body blank to form a th cavity, wherein at least part of the power head assembly is positioned in the th cavity;

drilling the other end of the valve body blank to form a second chamber, wherein at least part of the adjusting seat assembly is located in the second chamber;

drilling an th side of the valve body blank to form a connecting hole and a second connecting hole, wherein the second connecting hole is relatively close to the th cavity, the connecting hole is relatively close to the second cavity, and the second connecting hole is communicated with the th cavity;

drilling a second side of the valve body blank to form a third connecting hole and a fourth connecting hole, wherein the third connecting hole is relatively close to the th cavity, the fourth connecting hole is relatively close to the second cavity, the third connecting hole is communicated with the th cavity, and the fourth connecting hole is communicated with the second cavity;

drilling a third side of the valve body blank to form a third cavity, drilling a hole at the bottom of the center of the third cavity to form an th through hole, wherein the third cavity is communicated with the second cavity through the th through hole, and at least part of the valve core of the electromagnetic valve is positioned in the third cavity;

drilling the bottom of the third cavity to form a second through hole communicated with the connecting hole, wherein at least of the through hole and the second through hole are inclined holes;

wherein the machining of the inclined hole is after the machining of the third cavity and the machining of the inclined hole is after the machining of the second cavity.

2. The method for manufacturing an expansion valve according to claim 1, wherein the steps of forming the th chamber, the second chamber, the third connection hole, and the fourth connection hole are performed in steps.

3. An expansion valve manufacturing method according to claim 1 or 2, wherein the steps of forming the connection hole, the second connection hole, the third chamber, and the second through hole are performed in steps, and the third chamber is processed after the connection hole.

4. A method of manufacturing an expansion valve according to claim 1, wherein the step of manufacturing the third chamber comprises:

drilling the third side to form a bottom hole;

annular holes are drilled in the bottom wall of the valve body forming the bottom hole, and a boss is formed in the middle of the bottom wall of the valve body forming the bottom hole;

and drilling the boss to form the th through hole.

5. A method of manufacturing an expansion valve according to claim 4, wherein the step of manufacturing the third chamber comprises:

milling at least portions of the third side portion to form a platform portion;

it is right platform portion drilling forms the bottom opening, the degree of depth position of third chamber with the opening direction of third chamber is high, the diapire of bottom opening is in the high position in the third intracavity is not less than the high position of boss.

6. The method for processing an expansion valve according to claim 4, wherein the processing of the th penetration hole includes:

and drilling a pre-inclined hole on the bottom wall of the valve body forming the bottom hole, wherein the speed f of a drill bit is 50-60mm/r, and drilling the pre-inclined hole again.

7. A method for manufacturing an expansion valve according to claim 4, wherein steps are milled in the side wall of the bottom hole, and then the top wall of the boss and the steps are milled flat by using the same cutter .

8. The method of processing an expansion valve according to claim 1, wherein the step of processing the second through-hole includes:

drilling threads into the side wall of the valve body blank forming the third cavity;

steps are milled on the side wall with the screw thread by a milling cutter;

pre-drilling the step, wherein the drill bit speed f is 50-60 mm/r;

drilling the pre-hole again, wherein the included angle between the hole channel of the drilled hole and the second side part is 20-30 degrees;

the drilling path of the second through hole and the drilling path of the third cavity form an angle, the drilling path of the second through hole and the drilling path of the third cavity are intersected in the opening direction of the third cavity, and the drilling path of the through hole and the drilling path of the third cavity form an angle.

9, expansion valves, including adjusting the seat, electromagnetic valve core, the said valve block includes the attachment hole, fourth attachment hole, cavity, the said at least part of adjusting the seat locates in the said cavity, characterized by that, the said valve block includes the second cavity, there are cavity bottom wall and lobe block in the bottom that the said second cavity corresponds, the said lobe block stretches over the said cavity bottom wall, the said lobe block has the through hole, the said through hole communicates with said cavity, the said cavity can communicate with said second cavity through said through hole, the said fourth attachment hole can communicate with said cavity;

the valve body is further provided with a second through hole which comprises a th port and a second port, the th port is communicated with the second cavity, the second port is communicated with the th connecting hole, and the th connecting hole is communicated with the second cavity through the second through hole;

at least of the th penetration hole and the second penetration hole are oblique channels, the distance between the th port and the th penetration hole in the width direction is smaller than the distance between the second port and the th penetration hole in the width direction, and the area of the second penetration hole is smaller than that of the th connecting hole.

10. An expansion valve according to claim 9, wherein the second through-hole has an area smaller than 1/3 of the area of the connection hole, and the through-hole has an area smaller than the connection hole;

the valve body comprises a second through hole wall and a cavity side wall, wherein the cavity side wall is part of the wall part forming the second cavity, the second through hole wall is part of the wall part forming the second through hole, the second through hole wall is connected with the cavity side wall, the distance between the second through hole wall and the center line of the th through hole is not less than the distance between the cavity side wall and the center line of the th through hole, the extension line of the second through hole facing the second cavity has no intersection with the bulge, and the extension line of the second through hole facing the second cavity has no intersection with the cavity side wall;

the valve body comprises a cavity side wall, the cavity side wall comprises an th step wall, the second through hole interrupts the th step wall, the cavity side wall comprises an annular wall, and the annular wall is located above the th step wall in the opening direction of the second cavity;

the electromagnetic valve spool comprises an end face, and at least part of the end face is abutted against the th step wall;

the electromagnetic valve core comprises a side wall and a sealing ring, wherein the side wall comprises a concave part, at least part of the sealing ring is positioned in the concave part, the side wall is opposite to the annular wall, and the sealing ring is arranged in a sealing manner with the annular wall;

the valve body comprises an side part, a second side part, the side part is provided with the connecting hole, the second side part is provided with the fourth connecting hole, the valve body comprises a third side part, the third side part comprises a platform part, the platform part is provided with the second cavity, the platform part comprises a part and a second part, and the positions of the part and the second part projected on the side part are positioned on two sides of the connecting hole in the axial direction of the valve body;

the third side portion includes a base portion located on both sides of the land portion in the valve body axial direction to a drilling direction of the th cavity is a longitudinal direction of the valve body, and a distance between the base portion and a center line of the valve body longitudinal direction is smaller than a distance between the land portion and the center line of the valve body longitudinal direction.

Technical Field

The present invention relates to the field of refrigeration.

Background

The expansion valve is a commonly used part in a refrigeration system, the expansion valve generally comprises a valve body, an adjusting seat assembly, a valve rod, a valve core and a temperature sensing bulb, and the flow passing through a throttling hole can be adjusted, in some cases, in order to meet the condition of some systems, the opening degree of the expansion valve is zero, under the condition of , the expansion valve is realized by a solenoid valve, in , in the prior art, the expansion valve and the solenoid valve are integrated into a body, because the valve body of the expansion valve needs to be additionally provided with a valve port of the solenoid valve, can make the valve body structure of the expansion valve larger to a certain extent, how to make the valve body of the expansion valve with the solenoid valve core smaller in size is a.

Disclosure of Invention

The invention provides a processing method of expansion valves and expansion valves.

method for processing expansion valve, wherein the expansion valve comprises a power head assembly, an adjusting seat assembly and a solenoid valve spool, and the method for processing valve body comprises the following steps:

drilling an end of the valve body blank to form a th cavity, wherein at least part of the power head assembly is positioned in the th cavity;

drilling the other end of the valve body blank to form a second chamber, wherein at least part of the adjusting seat assembly is located in the second chamber;

drilling an th side of the valve body blank to form a connecting hole and a second connecting hole, wherein the second connecting hole is relatively close to the th cavity, the connecting hole is relatively close to the second cavity, and the second connecting hole is communicated with the th cavity;

drilling a second side of the valve body blank to form a third connecting hole and a fourth connecting hole, wherein the third connecting hole is relatively close to the th cavity, the fourth connecting hole is relatively close to the second cavity, the third connecting hole is communicated with the th cavity, and the fourth connecting hole is communicated with the second cavity;

drilling a third side of the valve body blank to form a third cavity, drilling a hole at the bottom of the center of the third cavity to form an th through hole, wherein the third cavity is communicated with the second cavity through the th through hole, and at least part of the valve core of the electromagnetic valve is positioned in the third cavity;

drilling the bottom of the third cavity to form a second through hole communicated with the connecting hole, wherein at least of the through hole and the second through hole are inclined holes;

wherein the machining of the inclined hole is after the machining of the third cavity and the machining of the inclined hole is after the machining of the second cavity.

expansion valve, including adjusting the seat, electromagnetic valve core, the said valve block includes attachment hole, fourth attachment hole, cavity, the said at least part of adjusting the seat locates at the said cavity, characterized by that, the said valve block includes the second cavity, there are cavity bottom wall and lobe block in the bottom that the said second cavity corresponds, the said lobe block protrudes and locates in the said cavity bottom wall, the said lobe block has through hole, the said through hole communicates with said cavity, the said cavity can communicate with said second cavity through said through hole, the said fourth attachment hole can communicate with said cavity;

the valve body is further provided with a second through hole which comprises a th port and a second port, the th port is communicated with the second cavity, the second port is communicated with the th connecting hole, and the th connecting hole is communicated with the second cavity through the second through hole;

at least of the th penetration hole and the second penetration hole are oblique channels, the distance between the th port and the th penetration hole in the width direction is smaller than the distance between the second port and the th penetration hole in the width direction, and the area of the second penetration hole is smaller than that of the th connecting hole.

According to the processing method of the technical scheme, the blank is machined, the third side portion is drilled to form the third cavity communicated with the second cavity, the bottom wall of the third cavity formed by the blank is drilled to form the second through hole communicated with the th connecting hole, at least of the through hole and the second through hole are inclined holes, and the third cavity is processed after the second cavity is processed, so that the size of the processed third side portion of the valve body is relatively small, and the valve body is beneficial to miniaturization.

Drawings

FIG. 1 is a schematic diagram of the views of embodiments of the invention;

FIG. 2 is a schematic diagram of another view of the structure shown in FIG. 1;

FIG. 3 is a schematic structural view of the valve body shown in FIG. 1;

FIG. 4 is a top view of the structure of FIG. 1 and a schematic perspective view taken along line H-H of the figure;

FIG. 5 is a side view of the structure of FIG. 1 and a cross-sectional view taken along line B-B of the figure;

FIG. 6 is a side view of the structure of FIG. 3 and a cross-sectional perspective view taken along line A-A of the figure;

FIG. 7 is a schematic view of another embodiments of the valve body of the invention;

FIG. 8 is a schematic structural diagram of another embodiments of the invention;

FIG. 9 is a schematic cross-sectional view taken along line C-C of FIG. 8;

FIG. 10 is a schematic cross-sectional view taken along line D-D of FIG. 8;

FIG. 11 is a side schematic view of the valve body shown in FIG. 8;

FIG. 12 is a top view of the valve body of FIG. 8;

FIG. 13 is a schematic cross-sectional view taken along line F-F of FIG. 12;

fig. 14 is a schematic cross-sectional view taken along line E-E of fig. 12.

FIG. 15 is a schematic view of a valve body processing step;

FIG. 16 is a schematic view of a third side of the valve body;

Detailed Description

The invention is described below in conjunction with the following figures and detailed description.

Referring to fig. 1 to 6, fig. 1 illustrates a structural schematic view of an expansion valve 100, where the expansion valve 100 includes a valve body 11, a power head assembly 12, a valve stem, a valve core assembly, an adjuster seat assembly, and a solenoid valve core 16.

The valve body 11 includes a connection aperture 111, a fourth connection aperture 112, a third connection aperture 113, and a second connection aperture 114, the valve body 11 includes a th cavity, a second cavity 115, and a third cavity 116, the powerhead assembly 12 is at least partially positioned within the th cavity, the regulator block assembly 15 is at least partially positioned within the second cavity 115, and at least a portion of the solenoid valve spool 16 is positioned within the third cavity 116.

When the valve core 16 of the solenoid valve is in a valve opening state, the third cavity 116 is communicated with the second cavity 115, the third cavity 116 is communicated with the connecting hole 111, so that fluid enters from the connecting hole 111 and enters the third cavity 116, then enters the second cavity 115, and the flow of the fluid leaving the fourth connecting hole 112 is controlled through the regulating effect of the valve core assembly 14, so that the flow control is realized, the valve core of the solenoid valve is in a valve closing state, the fluid entering the second cavity from the third cavity is cut off, and the connecting hole 111 is not communicated with the second cavity 115.

Referring to fig. 3, the valve body 11 includes a chamber bottom wall 1101, a chamber side wall 1102 and a protrusion 1103, the chamber side wall 1102 is a portion of a wall portion corresponding to the third chamber 116, the protrusion 1103 protrudes from the chamber bottom wall 1101, the protrusion 1103 may be located at the center of the third chamber 116, the protrusion 1103 is provided with a through hole 1104, the through hole 1104 communicates with the second chamber 115, and the third chamber 116 may communicate with the second chamber 115 through the through hole 1104.

As shown in fig. 4, the valve body 11 further includes a second penetration hole 117, the second penetration hole does not directly communicate with the second chamber 115, the first penetration hole may communicate with the second chamber 115 after passing through the second penetration hole 117, the third chamber 116, and the second penetration hole 0 in sequence, the second penetration hole 117 includes a second port 1171 and a second port 1172, the second 2 port 1171 communicates with the third chamber 116, a portion of a wall forming a port 863 of the third chamber 863 is located on the chamber bottom wall 1101, a portion of a wall forming a port 1171 of the second chamber is located on the chamber side wall 1102, the second port 1172 communicates with the third chamber 72 connecting hole 111, the port 1171 of the third is located closer to the chamber side wall 1102 than the penetration hole 1104, an extending direction of the penetration hole 1104 is not parallel to an extending direction of the second penetration hole 117, the chamber bottom wall 1101 is divided into a line, an extending line of the first and an extending line of the second penetration hole 117 is smaller than an equivalent flow of the second flow through hole , if the flow passing through hole is smaller than the flow through hole , the flow through hole 1104 is able to reduce the flow noise generated when the flow passing through hole , the flow passing through hole 117 is smaller than the flow passing through hole , the flow from the flow passing through hole 1104, the flow passing through hole 117 is smaller than the flow path of the flow passing through the flow path of the flow passing through the second chamber 116, the flow of the flow passing through hole 1104, the flow of the second chamber 116, the flow of the flow passing through the flow of the valve body, the flow of the flow passing through hole, the flow of.

In the present embodiment, the valve body 11 is a square structure, the valve body 11 includes a first side 1105, a second side 1106, and a third side 1107, the first side 1105 is provided with a first 0 connection hole 111, the second side 1106 is provided with a second connection hole 112, the first 1 side 1105 is opposite to the second side 1106, the third side 1107 is adjacent to the second 2 side 1105, and the third side 1107 is adjacent to the second side 1106, the width direction from the first side 1105 to the second side 1106 is taken as the width direction, the distance between the first port 1171 and the first through hole 1104 in the width direction is smaller than the distance between the second port 1172 and the through hole 1104 in the width direction, the second chamber 115 and the second connection hole 111 cannot be directly communicated, the second chamber 115 and the first connection hole 111 need to be staggered, but the second through hole 117 needs to communicate the third chamber 116 and the third connection hole 111, and the through 1104 needs to communicate the third chamber 115 and the third chamber in a certain situation, so that the diameter of the through hole can be reduced, and the through hole can be further, thereby reducing the opening diameter of the valve body can be facilitated.

Referring to fig. 3, the third side portion 1107 comprises a platform portion 1108, the platform portion 1108 is provided with the third cavity 116, the platform portion 1108 comprises an th portion 11081 and a second portion 11082, the positions of the th portion 11081 and the second portion 11082 projected on the th side portion 1105 are positioned on two sides of the th connecting hole 111 in the axial direction of the valve body, the vertical direction is perpendicular to the cavity bottom wall 1101, the duct of the second through hole 117 is an inclined channel, the platform portion 1108 is a mounting position of the solenoid valve core 16, the arrangement of the platform portion enables the solenoid valve core to be mounted more conveniently, and the positions of the th portion and the second portion of the platform portion projected on the th side portion are positioned on two sides of the th connecting hole in the axial direction of the valve body, so that the duct of the second through hole is as short as possible, and the valve body.

The bulge 1103 and the solenoid valve core 16 can be arranged in a sealing mode, the solenoid valve core 16 comprises the sealing portion 161, the sealing portion 161 can be a plastic sealing block, a duct of the th through hole 1104 corresponds to the bulge 1103 protruding direction , and the end face of the bulge 1103 is arranged approximately parallel to the cavity bottom wall 1101, so that the installation direction of the solenoid valve core 16 corresponds to the bulge 1103 protruding direction , the sealing arrangement between the sealing portion of the solenoid valve core and the end face of the bulge is facilitated, and the precision control of the solenoid valve is facilitated.

The valve body 11 includes a second through hole wall 1109, the second through hole wall 1109 is a portion forming a second through hole wall, since the valve body is provided with a second through hole, and the second through hole is located at the side of the chamber side wall 1102, so that the chamber side wall 1102 is in a discontinuous state due to the arrangement of the second through hole, the second through hole wall 1109 is connected with the chamber side wall 1102, the distance between the second through hole wall 1109 and the center line of the second through hole 1104 is not less than the distance between the chamber side wall 1102 and the center line of the second through hole 1104, the second through hole is an inclined channel with the vertical direction perpendicular to the chamber bottom wall, and the through hole is a straight channel.

The boss 1103 has a height of , and the extension line of the second through hole towards the third cavity has no intersection with the boss 1103, and the extension line of the second through hole towards the third cavity has no intersection with the cavity side wall, thus, the processing of the second through hole is facilitated, so that the processing of the second through hole does not affect the structure of the boss, and simultaneously the processing of the second through hole has a reduced influence on the cavity side wall to a certain extent .

In this embodiment, the protruding portion 1103 may be located at the center of the third cavity 116, and since the third cavity 116 may be used to install a valve core of the solenoid valve, if the protruding portion 1103 is eccentrically disposed, the structure of the valve core of the solenoid valve may also need to be eccentric, the structure of the valve core of the solenoid valve is complex, and the installation difficulty is also large.

The third side portion 1107 includes a base portion 11071, the base portion 11071 is located on both sides of the land portion 1108 in the axial direction of the valve body, the drilling direction of the th cavity is taken as the longitudinal direction of the valve body, the distance between the base portion 11071 and the center line of the longitudinal direction of the valve body is smaller than the distance between the land portion 1108 and the center line of the longitudinal direction of the valve body, the base portion 11071 is recessed in the third side portion 1107 with respect to the land portion 1108, and the weight of the valve body is reduced.

Referring to fig. 4 and 5, the chamber side wall 1102 includes a -th step wall 11021, the second through hole 117 interrupts the -th step wall 11021, that is, the -th step wall 11021 is a non-annular structure, the solenoid valve spool 16 includes an end surface 162, at least a portion of the end surface 162 is disposed against the -th step wall 11021, the sealing portion 161 has a sealing surface 163, and a distance between the end surface 162 and the sealing surface 163 is equal to a distance between a top surface of the boss 1103 and the -th step wall 11021.

Referring to fig. 5 and 6, the chamber side wall 1102 includes an annular wall 11022, the annular wall 11022 is located above the th step wall 11021 in the opening direction of the third chamber 116, the solenoid valve spool 16 includes a side wall 164 and a sealing ring 165, the side wall 164 includes a recess 166, at least a part of the sealing ring 165 is located in the recess 166, the side wall 164 is opposite to the annular wall 11022, and the sealing ring 165 is arranged in a sealing manner with the annular wall 11022, the annular wall 11022 is located above the th step wall 11021, and the annular wall 11022 is arranged in a sealing manner with the side wall 164, and furthermore ensures the tight fit of the solenoid valve spool with the valve body.

The form of the second through hole 117 may have various forms, and is not limited to the structure illustrated in the drawings, and several embodiments of the second through hole will be described below.

As shown in fig. 3, in the embodiments, the number of the second through-holes 117 is two or more, the orifice shape of the second through-holes 117 is circular, the equivalent flow area of a single second through-hole is smaller than that of the th through-hole 1104, and the sum of the equivalent flow areas of the second through-holes 117 is not smaller than that of the th through-hole.

In another preferred embodiments, the second through-holes have three second through-holes, the second through-hole has a circular orifice shape, the equivalent flow area of the second through-holes is smaller than the equivalent flow area of the through-holes, and the sum of the equivalent flow areas of the two second through-holes is not smaller than the equivalent flow area of the through-holes.

As another embodiments, as shown in fig. 7, fig. 7 illustrates a side view of another embodiments of the valve body 11 ', the number of second through-holes 117 ' is , and the orifice shape of the second through-holes 117 ' is an ellipse, and the equivalent flow area of the second through-holes is not smaller than the equivalent flow area of the through-holes.

Referring to fig. 8, fig. 8 illustrates a schematic structural view of another embodiments, fig. 8 illustrates a schematic structural view of the expansion valve 200, the expansion valve 200 includes a valve body 11 ", a power head assembly 12, a valve stem, a valve core assembly, a regulator seat assembly, and a solenoid valve core 16, the structure of the valve body 11" is substantially similar to that of the valve body 11, and in order to avoid redundancy, the detailed structure of the valve body 11' is not described in detail, and a specific structure of the valve body 11 "is described below.

Referring to fig. 9 to 14, the valve body 11 ″ includes a boss 1103 ', the boss 1103 ' is located at a center of the third chamber 116, the boss 1103 ' is provided with an th penetration hole 1104 ', and the th penetration hole 1104 ' communicates with the second chamber 115.

The valve body 11 "includes a second through hole 117", the second through hole 117 "includes a th port 1171 and a second port 1172, the th port 1171 is located close to the chamber side wall 1102 relative to the th through hole 1104 ', the second port 1172 is communicated with the th connecting hole 111, the extending direction of the th through hole 1104 ' is not parallel to the extending direction of the second through hole 117", the chamber bottom wall 1101 is a separation line, and the extending line of the th through hole 1104 ' intersects with the extending line of the second through hole 117 "at the opening side of the third chamber 116.

The through hole 1104 ' comprises a third port 1104a and a fourth port 1104b, the third port 1104a is located at the position of the third cavity 116, the fourth port 1104b is located at the position of the second cavity 115, and the distance between the center line of the third port 1104a and the straight extension line of the center line of the second through hole 117 ' is smaller than the distance between the center line of the fourth port 1104b and the straight extension line of the center line of the second through hole 117 '. thus, the second through hole is a straight channel and the third through hole is an inclined channel, and the equivalent flow area of the second through hole is not smaller than that of the through hole, so that the opening of the third cavity is smaller than that of a through hole without an inclined channel, so that the distance between the second through hole and the third through hole in the third cavity can be shortened, the opening diameter of the third cavity can be reduced to the extent of , the width of the side part of the third cavity in the valve body can be reduced, and the height of the valve body can be reduced, and the structure can be smaller.

Referring to fig. 15 and 16, fig. 15 and 16 show the general shape of the valve body 11, and here, in order to simplify the outer shape structure of the valve body, the platform portion and the like have been omitted. The machining method of the valve body 11 comprises the following steps:

drilling an end of the valve body blank to form a th cavity for mounting a power head assembly of the expansion valve and a valve rod hole for assembling a valve rod of the expansion valve;

the valve body blank is typically formed by drawing a stainless steel profile or by forging or the like.

Drilling the other end of the valve body blank to form a second chamber for mounting an adjuster seat assembly of the expansion valve;

for convenience of description, the valve body blank is defined to comprise th side part, a second side part and a third side part 1107, wherein the third side part 1107 is adjacent to the th side part, the third side part is adjacent to the second side part, the th side part is opposite to the second side part, the th side part of the valve body blank is drilled to form a th connecting hole which is communicated with the th cavity, the second connecting hole is relatively close to the th cavity, and the th connecting hole is relatively close to the th cavity;

drilling a second side of the valve body blank to form a third connecting hole, wherein the third connecting hole is relatively close to the th cavity, the fourth connecting hole is relatively close to the second cavity, the third connecting hole is communicated with the th cavity to form a fourth connecting hole, and the fourth connecting hole is communicated with the second cavity;

drilling a third side of the valve body blank to form a third cavity, drilling a hole in the center of the third cavity to form an th through hole, wherein the third cavity is communicated with the second cavity through the th through hole, and at least part of the valve core of the electromagnetic valve is positioned in the third cavity;

drilling the bottom of the third cavity to form a second through hole communicated with the connecting hole, wherein at least of the through hole and the second through hole are inclined holes;

wherein the machining of the inclined hole is after the machining of the third cavity and the machining of the inclined hole is after the machining of the second cavity.

The processing of the third cavity is carried out after the processing of the second cavity, and the processing of the third cavity is carried out after the processing of the th connecting hole.

The drilling path of the second through-hole is angled with respect to the drilling path of the th through-hole.

As an embodiment, the drill path of the second through-hole is at an angle to the drill path of the third chamber, and the drill path of the second through-hole intersects the drill path of the third chamber in the direction of the opening of the third chamber.

As another implementations, the bore path of the through-hole is angled from the bore path of the third cavity.

In addition, because the second through hole is communicated with the connecting hole, and the drilling path of the second through hole and the drilling path of the third cavity are in an angle, the processing sequence of the third cavity is after the processing of the connecting hole, so that the processing of the second through hole is more accurate.

Wherein, form th chamber, second chamber, third connecting hole, fourth connecting hole's step can go on in processes, fixes it through frocks like this, can realize the processing of th chamber, second chamber, third connecting hole, fourth connecting hole, and not only processing is simple, helps promoting the machining precision moreover.

The steps of forming the th connecting hole, the 8932 th third cavity and the th penetrating hole can be performed in steps, so that the third side portion can be conveniently machined, and the machining steps are simplified.

The processing steps of the third cavity comprise:

drilling the third side to form a bottom hole;

more specifically, at least part of the third side part is milled to form a platform part, the platform part is drilled to form the bottom hole, the depth of the third cavity is higher than the opening direction of the third cavity, the bottom wall of the third cavity is lower, and the height position of the bottom wall of the bottom hole in the third cavity is not lower than the height position of the boss.

annular holes are drilled in the bottom wall of the valve body, which forms the bottom hole, and a boss is formed in the middle of the bottom wall of the bottom hole;

drilling the boss to form an th through hole, wherein the th through hole is communicated with the second cavity.

The processing step of the th penetrating hole comprises the following steps:

and (3) drilling a pre-hole in the bottom wall of the valve body forming the bottom hole, wherein the speed f of a drill is 50-60mm/r, and drilling the pre-hole again.

The processing step of the second through hole comprises the following steps:

steps are milled on the side wall of the bottom hole, then the cutter is milled flat on the top wall of the boss and the steps by the same cutter , and since the top wall of the boss and the steps are matched with the valve core of the electromagnetic valve, the milling of the cutter by the same cutter is beneficial to ensuring the accuracy of the two positions and the matching accuracy of the cutter and the valve core of the electromagnetic valve.

Milling the step at the position of the second through hole, and pre-drilling the step, wherein the drill bit speed f is 50-60 mm/r;

and drilling the pre-hole again, wherein the included angle between the hole passage of the drilled hole and the second side part is 20-30 degrees.

The step is milled flat, the second through hole is drilled, the space of the third cavity can be utilized to the maximum extent, in addition, the included angle between the hole channel of the drilled hole and the second side portion is controlled to be 20-30 degrees, and the width size of the third side portion, namely the distance between the th side portion and the second side portion can be reduced in the aspect of , so that the size of the valve body is reduced, in addition, in the aspect of , the structure of the boss is not interfered by the drilling process, and under the condition of reducing the size, the precise design of the valve body can still be considered.

Drilling threads into the side wall of the valve body blank forming the third cavity; the thread is used for being matched and connected with the valve core of the electromagnetic valve.

It should be noted that the above-mentioned embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, such as the definitions of directions of "front", "back", "left", "right", "upper", "lower", etc., although the present invention has been described in detail by referring to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may still be combined, modified or equivalently replaced by without departing from the spirit and scope of the present invention and its modifications should be covered by the claims of the present invention.