A clamping positioning tool for valve port machining

Abstract

The application discloses a clamping positioning tool for valve port machining, relates to the technical field of valve machining, and comprises a horizontal plate fixed in the middle part of a workbench, a fixing frame and an L-shaped support, wherein the L-shaped support is provided with a cam mechanism, the cam mechanism comprises a gas cylinder, a connecting rod, a cam and a clamping assembly, the gas cylinder is hinged to a hinge seat of a horizontal part of the L-shaped support, the cam is rotationally connected to a mandrel of the L-shaped support, one end of the connecting rod is hinged to the cam, and the other end is hinged to a piston rod of the gas cylinder, and the clamping assembly is movably connected to the L-shaped support and used for clamping the right end face of a valve body. The clamping action is realized by adopting the gas cylinder to drive the cam mechanism, the speed is high, the clamping and unclamping time can be greatly shortened, the production cost is reduced, and the tool is particularly suitable for a small-batch trial production mode.

Description

Technical Field

[0001] This application relates to the field of valve processing technology, specifically to a clamping and positioning fixture for processing valve ports. Background Technology

[0002] Valves, especially valve bodies, are critical control components in fluid transport systems. Their ports (such as inlets and outlets) typically require grinding to ensure a tight seal and reliable connection to the piping system.

[0003] For existing valve body port grinding, many companies use non-standard equipment for grinding. However, for small-batch trial production, it is necessary to choose general-purpose equipment, such as the M7130 horizontal spindle rectangular table surface grinder. Therefore, for grinding valve body ports using the M7130 horizontal spindle rectangular table surface grinder, designers need to design a set of clamping and positioning fixtures to meet the processing requirements. Utility Model Content

[0004] In view of this, this application provides a clamping and positioning fixture for valve port machining to meet the needs of small-batch trial production using surface grinders.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A clamping and positioning fixture for machining valve ports, comprising: A horizontal board, fixed in the middle of the workbench; A fixed bracket is installed on the left side of the horizontal plate; An L-shaped bracket is positioned on the right side of the horizontal plate; The L-shaped bracket is equipped with a cam mechanism, which includes: One cylinder, the cylinder body is hinged to the horizontal part of the L-shaped bracket; A cam, which is rotatably connected to an L-shaped bracket via a spindle; A connecting rod, one end of which is hinged to a cam and the other end of which is hinged to the piston rod end of a cylinder; A clamping assembly is movably mounted on an L-shaped bracket and driven by a cam to clamp the right end face of the valve body.

[0006] Furthermore, the L-shaped bracket has a through groove, and the cam is accommodated in the through groove.

[0007] Furthermore, the clamping assembly includes: A pair of sliding rods are parallel to each other and pass through corresponding guide sleeves on the L-shaped bracket, and can slide axially; A pressure plate is fixedly connected to one end of a pair of sliding rods facing the fixed frame, and is used to press the valve body. A pair of reset components are respectively disposed at the other end of a pair of sliding rods to limit the sliding stroke of the sliding rods.

[0008] Furthermore, the reset component includes: A mounting block is provided, and the end of the sliding rod is fitted into the first mounting hole for installation. A fixing screw passes through the second mounting hole of the mounting block and is threaded to the end of the sliding rod to lock the mounting block in place.

[0009] Furthermore, the reset assembly also includes a compression spring, which is sleeved on the sliding rod, with its two ends abutting against the outer side of the L-shaped bracket and the side of the mounting block, respectively.

[0010] Furthermore, a positioning plate is installed on the fixing frame, and an arc-shaped groove matching the outer contour of the valve body is opened in the middle of the positioning plate.

[0011] Furthermore, the positioning plate is fixed to the mounting bracket by multiple bolts, and a pair of positioning pins are provided on the positioning plate.

[0012] Furthermore, the number of bolts is four.

[0013] As can be seen from the above technical solution, the advantages of this application are: 1. In this application, a cylinder-driven cam is used to achieve the clamping action, which is fast and the cylinder action is rapid, which can greatly shorten the clamping and unloading time.

[0014] 2. In this application, the positioning and clamping of the valve body are achieved by positioning the arc groove of the positioning plate, positioning the horizontal plate, and linkage of the cam and pressure plate on the moving side.

[0015] 3. The cam in this application is housed in a through groove, and the clamping assembly uses a sliding rod and a guide sleeve for cooperation, thus making the structure more compact.

[0016] 4. The clamping assembly of this application is equipped with a compression spring. When releasing, the compression spring can quickly reset the pressure plate. In addition, during clamping, the compression spring can absorb some of the impact during clamping, preventing damage to the valve body due to excessive cylinder speed or improper stroke setting.

[0017] 5. The positioning plate on the fixed frame of this application is detachably connected by bolts and positioning pins, which greatly facilitates the replacement of the positioning plate when needed. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0019] Figure 1 This is a schematic diagram of the structure of the clamping valve body in this application.

[0020] Figure 2 This is a schematic diagram of the structure of this application when installed on an M7130 horizontal spindle table surface grinder.

[0021] Figure 3 This is a diagram showing the fit between the sliding rod and the mounting block in this application.

[0022] Figure 4 This is a schematic diagram of the cam mechanism of this application.

[0023] Figure 5 This is a structural cross-sectional view of the cam mechanism of this application.

[0024] Figure 6 This is a side view showing the connection between the cam and the L-shaped bracket in this application.

[0025] Figure 7 This is a diagram showing the fit between the mounting bracket and the positioning plate in this application.

[0026] Figure 8 for Figure 7 A side view from direction A.

[0027] Explanation of reference numerals in the attached drawings: 1. Bed; 2. Grinding wheel; 3. Worktable; 4. Cross plate; 5. Fixing frame; 6. L-shaped bracket; 61. Horizontal section; 7. Cylinder; 8. Piston rod; 9. Connecting rod; 10. Cam; 11. Sliding rod; 12. Pressure plate; 13. Positioning plate; 131. Arc groove; 132. Bolt; 133. Positioning pin; 14. Guide sleeve; 15. Through groove; 16. Compression spring; 17. Mounting block; 171. First mounting hole; 172. Second mounting hole; 18. Fixing screw; 19. Mandrel. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0029] refer to Figures 1 to 8 ,like Figure 2 As shown, Figure 2This diagram illustrates the structure of the present application mounted on an M7130 horizontal spindle rectangular table surface grinder. The M7130 is a commonly used surface grinder in enterprises, ideal for small-batch trial production. Typically, the inlet and outlet faces of the valve body need to be ground to ensure the sealing and reliability of the connection between the inlet and outlet and the piping system. During valve body trial production, especially for small-batch trials, the M7130 horizontal spindle rectangular table surface grinder is particularly suitable for grinding the valve body ports. During grinding, a clamping and positioning fixture is required to fix the valve body on the worktable 3 of the M7130 horizontal spindle rectangular table surface grinder. Figure 2 As shown, the M7130 horizontal spindle rectangular table surface grinder mainly includes a bed 1, a worktable 3, and a grinding wheel 2.

[0030] Therefore, this application provides a clamping and positioning fixture for machining valve ports, to meet the requirements of grinding valve body ports on an M7130 horizontal spindle table surface grinder.

[0031] like Figure 1 As shown, this application embodiment provides a clamping and positioning fixture for valve port processing, including a horizontal plate 4, a fixing frame 5 and an L-shaped bracket 6. The horizontal plate 4 is fixed in the middle of the workbench 3, the fixing frame 5 is installed on the left side of the horizontal plate 4, and the L-shaped bracket 6 is installed on the right side of the horizontal plate 4.

[0032] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, a cam mechanism is installed on the L-shaped bracket 6. The cam mechanism includes a cylinder 7, a connecting rod 9, a cam 10, and a clamping assembly. The cam 10 is rotatably connected to the spindle 19 of the L-shaped bracket 6. One end of the connecting rod 9 is fixed to the cam 10. The lower end of the cylinder 7 is hinged to the hinge seat of the horizontal part 61 of the L-shaped bracket 6. The piston rod 8 of the cylinder 7 is hinged to the other end of the connecting rod 9.

[0033] The clamping assembly is movably connected to the L-shaped bracket 6 and can clamp the right end face of the valve body. The clamping assembly includes a pair of sliding rods 11, a pressure plate 12, and a pair of reset assemblies. A guide sleeve 14 is installed on the L-shaped bracket 6, and the sliding rods 11 slide in cooperation with the corresponding guide sleeves 14. The pressure plate 12 is fixed to one end of the pair of sliding rods 11 and can clamp the right end face of the valve body. The pair of reset assemblies are respectively located at the other end of the corresponding sliding rods 11. The cooperation between the sliding rods 11 and the guide sleeves 14 has good guiding performance, and both are standard parts that are easy to wear, so replacement is convenient and maintenance costs are low.

[0034] Preferably, there can be 4 sliding rods 11, 4 corresponding guide sleeves 14, and 4 reset components.

[0035] Preferably, the cam 10 is accommodated in the through slot 15 opened on the L-shaped bracket 6.

[0036] like Figure 1 and Figure 3 As shown, the reset assembly includes a mounting block 17, a compression spring 16, and a fixing screw 18. The mounting block 17 is located at the other end of the sliding rod 11. Specifically, the end of the sliding rod 11 is fitted into the first mounting hole 171 of the mounting block 17, and the fixing screw 18 passes through the second mounting hole 172 of the mounting block 17 and is threadedly connected to the corresponding end of the sliding rod 11 to reliably fix the mounting block 17 to the end of the sliding rod 11. The compression spring 16 is sleeved on the sliding rod 11, and its two ends press against the side end face of the L-shaped bracket 6 and the side end face of the mounting block 17, respectively, forming a reset system. When the pressure plate 12 is released, the compression spring 16 can quickly reset the pressure plate 12, which then facilitates the removal of the valve body from the tooling.

[0037] In addition, the compression spring 16 forms a flexible buffer system. During clamping, the compression spring 16 can absorb some of the impact during clamping, preventing damage to the valve body due to excessive speed of cylinder 7 or improper stroke setting.

[0038] like Figure 1 , Figure 7 and Figure 8 As shown, a positioning plate 13 is installed on the fixing frame 5. An arc-shaped groove 131 is opened in the middle of the positioning plate 13. The arc-shaped surface of the valve body fits into the arc-shaped groove 131, realizing the fit between the positioning plate 13 and the outer contour of the valve body. Combined with the pressure plate 12 pressing the end cover mounting surface of the valve body, and the other end of the valve body pressing against the horizontal plate 4, the valve body is clamped.

[0039] Preferably, the positioning plate 13 is fixedly connected to the fixing frame 5 by multiple bolts 132, and a pair of positioning pins 133 are provided on the positioning plate 13. Connecting the positioning plate 13 to the fixing frame 5 by bolts 132 and positioning pins 133 facilitates installation and disassembly, and makes it easier to replace the positioning plate 13 with a new one after it wears out. Preferably, the number of bolts 132 is four.

[0040] When grinding is required on the upper and lower ends of the valve body, place one end of the valve body on the horizontal plate 4 with the other end facing upwards. The arc-shaped surface of the valve body should fit against the arc-shaped groove 131. Turn on the air source and the solenoid valve to make the cylinder 7 work. The piston of the cylinder 7 drives the piston rod 8 to extend, which drives the cam 10 to rotate through the connecting rod 9. The cam 10 presses against the pressure plate 12 to press the end cover mounting surface of the valve body, so that the valve body is reliably clamped. Then, turn on the M7130 horizontal spindle rectangular table surface grinder to grind the end of the valve body. After the grinding is completed, stop the grinder and switch the solenoid valve to retract the piston rod 8 and reset the cam 10. At the same time, under the reset action of the compression spring 16, the pressure plate 12 is reset. Remove the valve body, flip the valve body so that the other end of the valve body faces upwards, and re-clamp the valve body to grind the other end of the valve body.

[0041] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A clamping and positioning fixture for machining valve ports, characterized in that, include: A horizontal plate (4) is fixed to the middle of the workbench (3); A fixing frame (5) is installed on the left side of the horizontal plate (4); An L-shaped bracket (6) is provided on the right side of the horizontal plate (4); The L-shaped bracket (6) is provided with a cam mechanism, which includes: A cylinder (7), the cylinder body of which is hinged to the horizontal part (61) of the L-shaped bracket (6); A cam (10) is rotatably connected to the L-shaped bracket (6) via a spindle (19). A connecting rod (9), one end of which is fixed to the cam (10), and the other end is hinged to the end of the piston rod (8) of the cylinder (7); A clamping assembly is movably mounted on the L-shaped bracket (6) and driven by the cam (10) to clamp the right end face of the valve body.

2. The clamping and positioning fixture for valve port machining according to claim 1, characterized in that, The L-shaped bracket (6) has a through groove (15), and the cam (10) is housed in the through groove (15).

3. The clamping and positioning fixture for valve port machining according to claim 1, characterized in that, The clamping assembly includes: A pair of sliding rods (11) are parallel to each other and pass through the corresponding guide sleeves (14) on the L-shaped bracket (6), and can slide axially; A pressure plate (12) is fixedly connected to one end of a pair of sliding rods (11) facing the fixed frame (5) for pressing the valve body; A pair of reset components are respectively disposed at the other end of the pair of sliding rods (11) for resetting the pressure plate (12).

4. The clamping and positioning fixture for valve port machining according to claim 3, characterized in that, The reset component includes: A mounting block (17) is mounted on the end of the sliding rod (11); A compression spring (16) is sleeved on the sliding rod (11), and the two ends of the compression spring (16) abut against the outer side of the L-shaped bracket (6) and the side of the mounting block (17), respectively.

5. The clamping and positioning fixture for valve port machining according to claim 1, characterized in that, A positioning plate (13) is installed on the fixing frame (5), and an arc groove (131) matching the outer contour of the valve body is opened in the middle of the positioning plate (13).

6. The clamping and positioning fixture for valve port machining according to claim 5, characterized in that, The positioning plate (13) is fixed to the fixing frame (5) by multiple bolts (132).

7. The clamping and positioning fixture for valve port machining according to claim 6, characterized in that, The positioning plate (13) and the fixing frame (5) are positioned by a pair of positioning pins (133).

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