Clamp structure for machining pressure regulating valve shell

Abstract

The utility model discloses a clamp structure for processing a pressure regulating valve shell, which comprises a bottom plate, a hinge hydraulic cylinder element group, a positioning surface boss group and a positioning pin mounted on a part of positioning surface bosses in the positioning surface boss group, and the bottom plate is provided with a hole for processing the assembling end surface of the pressure regulating valve shell. Hinge hydraulic cylinder elements connected to the bottom plate are arranged on the hinge hydraulic cylinder element set in the circumferential direction of the hole at equal angles, and positioning face bosses in the positioning face boss set correspond to the positions of the hinge hydraulic cylinder elements. According to the clamp structure, the hole for machining the end face is formed in the clamp bottom plate, machining of the assembly end face is achieved through machining programming while precise thread machining is completed, and the stability of production quality is achieved.

Description

Technical Field

[0001] The utility model relates to the field of clamps, in particular to a clamp structure used for processing a pressure regulating valve housing. Background Art

[0002] The shell castings of natural gas pipeline pressure regulating valves are usually made of aluminum alloy because of its excellent casting performance, stability, dimensional accuracy, durability and safety. These characteristics make aluminum alloy an ideal choice for manufacturing such castings. During the production process, the precision threads of the castings are usually processed by a machining center, while the assembly end faces are polished by a flat belt sander. At present, the machining center fixture uses a hinged hydraulic cylinder three-point positioning method, which can ensure the stability and accuracy of the castings during the processing to a certain extent. However, when it comes to polishing the assembly end faces, the existing technology mainly relies on manual operation. The operator uses a flat belt sander to polish the assembly end faces of the castings to achieve the required flatness and finish.

[0003] In the process of implementing the prior art, the inventor discovered that:

[0004] Since aluminum alloy valve body castings are large and heavy, it is difficult to maintain consistency and balance when manually grinding. This causes the assembly end face to be skewed during the grinding process, which in turn affects the flatness of the end face. Unqualified flatness will not only reduce the quality of the casting.

[0005] Therefore, it is necessary to provide a fixture that can not only process the precision threads of castings, but also open an avoidance position for machined end faces on the fixture in combination with the casting structure, so as to complete the precision thread processing and realize the machining of the assembly end face through machining programming at the same time, so as to achieve stability in production quality. Summary of the invention

[0006] The embodiment of the present application provides a fixture that can not only process the precision threads of castings, but also can provide an avoidance position for machining end faces on the fixture in combination with the casting structure. While completing the precision thread processing, the assembly end faces can be machined through machining programming, thereby achieving stable production quality.

[0007] Specifically, a fixture structure for processing a pressure regulating valve housing includes a base plate, a hinge hydraulic cylinder element group, a positioning surface boss group, and positioning pins installed on some of the positioning surface bosses in the positioning surface boss group. The base plate is provided with a hole for processing the assembly end face of the pressure regulating valve housing. The hinge hydraulic cylinder element group is provided with hinge hydraulic cylinder elements connected to the base plate at equal angles along the circumference of the hole. The positioning surface bosses in the positioning surface boss group correspond to the positions of the hinge hydraulic cylinder elements.

[0008] Furthermore, the holes of the bottom plate include basic holes for machining the flat assembly end faces of the pressure regulating valve housing and several avoidance holes for machining the assembly end faces of several connecting holes of the pressure regulating valve housing. The basic holes and the several avoidance holes are combined to form a hole.

[0009] Furthermore, it also includes an anti-foolproof pin group arranged on the bottom plate, and the anti-foolproof pins in the anti-foolproof pin group are respectively arranged between the hinge hydraulic cylinder elements in the hinge hydraulic cylinder element group.

[0010] The technical solution provided in the embodiments of the present application has at least the following beneficial effects:

[0011] The present application provides a fixture structure for processing a pressure regulating valve housing, which is designed based on the complex structural characteristics of this type of parts. A hole for machined end faces is provided on the fixture base plate, and while completing precision thread processing, the assembly end faces are machined through machining programming, thereby achieving stability in production quality, improving the processing efficiency of the pressure regulating valve housing, reducing the defective scrap rate, and enhancing corporate competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0013] Figure 1 A schematic diagram of the structure of a pressure regulating valve housing provided in an embodiment of the present application;

[0014] Figure 2 A schematic diagram of a fixture structure for processing a pressure regulating valve housing provided in an embodiment of the present application;

[0015] Figure 3 A schematic diagram of a clamp structure for mounting a pressure regulating valve housing provided in an embodiment of the present application on a pressure regulating valve housing processing;

[0016] Figure 4 Another schematic diagram of a clamp structure for mounting a pressure regulating valve housing provided in an embodiment of the present application on a pressure regulating valve housing processing;

[0017] Reference numerals:

[0018] A fixture structure for processing a pressure regulating valve housing-100;

[0019] Base plate-1; hole-11; basic hole-111; avoidance hole-112;

[0020] Hinge hydraulic cylinder component group-2; Hinge hydraulic cylinder component-21;

[0021] Positioning surface boss group-3; Positioning surface boss-31;

[0022] Positioning pins - 4;

[0023] Anti-fool pin group-5; Anti-fool pin-51;

[0024] Pressure regulating valve housing-6; precision threaded hole-61; assembly end face-62; plane assembly end face-621; connection hole assembly end face-622. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0026] Please refer to Figure 1 , is a schematic diagram of the structure of the pressure regulating valve housing 6. The fixture structure of the present application is mainly used for processing the precision threaded hole 61 and the assembly end face 62 of the pressure regulating valve housing 6, that is, the same fixture can realize the processing of the precision threaded hole 61 and is suitable for processing the assembly end face 62. It should be pointed out that the assembly end face in the pressure regulating valve housing includes both the plane assembly end face 621 and the connection hole assembly end face 622.

[0027] Please refer to Figures 2 to 4 , a fixture structure 100 for processing a pressure regulating valve housing 6 provided in the present application, includes a base plate 1, a hinge hydraulic cylinder element group 2, a positioning surface boss group 3, and a positioning pin 4 installed on a part of the positioning surface boss 31 in the positioning surface boss group 3, the base plate 1 is provided with a hole 11 for processing the assembly end face 62 of the pressure regulating valve housing 6, the hinge hydraulic cylinder element group 2 is provided with hinge hydraulic cylinder elements 21 connected to the base plate 1 at equal angles along the circumference of the hole 11, and the positioning surface boss 31 in the positioning surface boss group 3 corresponds to the position of the hinge hydraulic cylinder element 21.

[0028] Specifically, in the past, when processing the precision threaded hole 61 of the pressure regulating valve housing 6, the fixture structure only required the base plate 1, the hinge hydraulic cylinder element group 2, the positioning surface boss group 3, and the positioning pin 4 installed in the partial positioning surface boss 31 of the positioning surface boss group 3. In the present application, in order to avoid the problem that when the pressure regulating valve housing 6 is subsequently polished for the assembly end face 62, the balance of the polishing force cannot be effectively controlled manually, resulting in the end face being easily skewed and the flatness being unqualified, the fixture structure is improved to achieve that the fixture structure can realize both the processing of the precision threaded hole 61 and the machining of the assembly end face 62 through the fixture structure.

[0029] It should be pointed out that the fixture structure of the present application improves the structure of the bottom plate 1 on the basis of enabling the precision threaded hole 61 of the pressure regulating valve housing 6 to be newly processed. A hole 11 is opened at the bottom plate 1 at the position corresponding to the pressure regulating valve housing 6. It is understandable that after the precision threaded hole 61 of the pressure regulating valve housing 6 is processed, the fixture structure is flipped so that the bottom surface of the bottom plate 1 corresponds to the processing position of the assembly end surface 62, and then the assembly end surface 62 is processed. It is also understandable that the flipping of the fixture structure can be achieved by the existing technology for the technical personnel in the technical field, and no further elaboration is made here.

[0030] Furthermore, since the assembly end face 62 of the pressure regulating valve housing 6 includes both a planar assembly end face 621 and a connecting hole assembly end face 622, the hole 11 of the base plate 1 includes a basic hole 111 for processing the planar assembly end face 621 of the pressure regulating valve housing 6 and a plurality of avoidance holes 112 for processing a plurality of connecting hole assembly end faces 622 of the pressure regulating valve housing 6. The basic hole 111 and the plurality of avoidance holes 112 are combined to form a hole 11.

[0031] In an embodiment provided in the present application, the pressure regulating valve housing 6 includes 8 connection hole assembly end faces 62 , that is, the corresponding base plate 1 is formed by combining a basic hole 111 and 8 avoidance holes 112 to form a hole 11 .

[0032] Furthermore, it also includes an anti-foolproof pin group 5, and the anti-foolproof pins 51 in the anti-foolproof pin group 5 are respectively arranged between the hinge hydraulic cylinder elements 21 in the hinge hydraulic cylinder element group 2.

[0033] During the actual use of the fixture structure of the present application, the fixture is installed on the machine platform, and then the pressure regulating valve housing 6 is placed at the corresponding position of the bottom plate 1. The hinge hydraulic cylinder element group 2 includes three hinge hydraulic cylinder elements 21 arranged at equal angles on the bottom plate 1 along the circumference of the hole 11. The positioning surface boss group 3 is three positioning surface bosses 31 corresponding to the hinge hydraulic cylinder elements 21 and arranged on the bottom plate 1. The anti-stupid pin group 5 includes six anti-stupid pins 51, which are arranged in pairs between the hinge hydraulic cylinder elements 21. The machine platform is equipped with buttons for controlling the clamping and releasing of the hinge hydraulic cylinder element group 2 of the fixture structure, as well as a start button for controlling the flipping of the fixture structure. After the clamping button is activated, the three groups of chain hydraulic cylinder elements move to clamp the pressure regulating valve housing 6, completing the positioning and clamping of the pressure regulating valve housing 6. The start button is activated, and the precision thread processing and assembly end face 62 processing are realized by flipping the fixture. After the processing is completed, the fixture position is reset, and the three groups of chain hydraulic cylinder elements are released at the same time to complete one processing.

[0034] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the existence of other identical elements in the process, method, commodity or device including the element.

[0035] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A fixture structure for processing a pressure regulating valve housing, characterized in that: It includes a base plate, a hinge hydraulic cylinder element group, a positioning surface boss group, and positioning pins installed on some of the positioning surface bosses in the positioning surface boss group. The base plate is provided with a hole for processing the assembly end face of the pressure regulating valve housing. The hinge hydraulic cylinder element group is provided with hinge hydraulic cylinder elements connected to the base plate at equal angles along the circumference of the hole. The positioning surface bosses in the positioning surface boss group correspond to the positions of the hinge hydraulic cylinder elements.

2. The clamp structure according to claim 1, characterized in that: The holes of the bottom plate include basic holes for machining the plane assembly end face of the pressure regulating valve housing and several avoidance holes for machining the assembly end faces of several connecting holes of the pressure regulating valve housing. The basic holes and the several avoidance holes are combined to form a hole.

3. The clamp structure according to claim 1, characterized in that: It also includes an anti-foolproof pin group arranged on the bottom plate, and the anti-foolproof pins in the anti-foolproof pin group are respectively arranged between the hinge hydraulic cylinder elements in the hinge hydraulic cylinder element group.

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