Filler gland machining tool

Abstract

The utility model provides a packing gland machining tool which comprises a tool body, and a positioning groove which is used for installing a packing gland and has a certain width is formed in the middle of the upper surface of the tool body in the diameter direction. A center positioning hole matched with a bottom face cylinder of a to-be-fixed packing gland, a first positioning hole and a second positioning hole are formed in the positioning groove, the first positioning hole and the second positioning hole are matched with two bolt holes of the to-be-fixed packing gland, and the depth of the tool body positioning hole is larger than that of the bottom face cylinder of the to-be-fixed packing gland. A preset gap exists between the bottom of the bottom face cylinder of the to-be-fixed packing gland and the tool body. The clamping mode designed by the utility model is favorable for avoiding the weak part of the cylinder of the thin-wall workpiece, and the stress surface is converted to the plane of the workpiece, so that the stress area is increased, and the damage of clamping force to the outer surface of the workpiece is reduced. According to the tool, the alignment is not needed in other processing except for the first time of metering alignment, so that the time is saved.

Description

Technical Field

[0001] The utility model relates to the field of industrial valve design and manufacturing, in particular to a packing gland processing tool. Background Art

[0002] In the design and manufacture of industrial valves, the packing gland is a crucial component, crucial for ensuring valve sealing. It is widely used in valves for various equipment and pipelines. Traditional tooling for machining packing glands involves a three-jaw chuck and a tire expander. As valve diameters decrease, the gland's dimensions also decrease. Traditional tooling cannot guarantee the geometric and positional tolerances of small parts. Furthermore, during machining, the combined effects of clamping and cutting forces can cause workpiece deformation, especially in the weakest areas of thin-walled workpieces, such as the cylindrical portion. This can severely impact product quality and production efficiency. Utility Model Content

[0003] In response to the above technical problems, a packing gland processing tool is provided. The technical means adopted by the utility model are as follows:

[0004] A packing gland processing tool comprises a tool body, wherein a positioning groove with a certain width is provided in the middle portion of the upper surface of the tool body along the diameter direction for installing the packing gland, wherein the positioning groove is provided with a central positioning hole matching the bottom cylinder of the packing gland to be fixed and a first positioning hole and a second positioning hole matching the two bolt holes of the packing gland to be fixed, the depth of the positioning hole of the tool body is greater than the depth of the bottom cylinder of the packing gland to be fixed, and there is a preset gap between the bottom of the bottom cylinder of the packing gland to be fixed and the tool body.

[0005] Furthermore, during the processing, a first bolt and a second bolt are cooperatively installed in the first positioning hole and the second positioning hole.

[0006] Furthermore, the tooling body is a column, and end positioning grooves for installing bolts connected to the machine tool workbench are vertically opened at both ends of the through-center positioning hole perpendicular to the positioning groove, and a third positioning hole and a fourth positioning hole are opened in the end positioning grooves.

[0007] Furthermore, during the processing, the end of the bolt connected to the machine tool worktable is connected to the T-shaped sliding block in the T-shaped groove of the machine tool worktable.

[0008] Furthermore, during the processing, the processing tooling is fixed by a three-jaw chuck.

[0009] The utility model has the following advantages:

[0010] 1. Improved processing efficiency and reduced product deformation:

[0011] Taking advantage of the product's external contour, a new positioning method was designed to change the direction of the clamping force on the product. The clamping force of the original three-jaw chuck is located in the circumferential direction of the cylindrical part of the product. The clamping method designed by the utility model is conducive to avoiding the weak part of the cylinder of the thin-walled workpiece, and the force-bearing surface is converted to the plane of the workpiece, which increases the force-bearing area and reduces the damage of the clamping force to the outer surface of the workpiece. Under the action of the cutting force of the milling machine, the angle between the surface to be processed of the product and the axis of the milling cutter is 90°, which can minimize the deformation of the surface to be processed of the product. In previous processing methods, the clamping and correction time exceeded twenty minutes. Except for the first time, the tooling of the utility model needs to be aligned, and the rest of the processing does not require alignment, which saves time.

[0012] 2. Guaranteed processing accuracy:

[0013] The original processing method is to use a three-jaw chuck and a bulging tire to clamp the thin-walled cylindrical position at the bottom of the workpiece. There is a certain distance between the workpiece surface to be processed and the clamping position of the tooling. When the cutting force acts on the surface to be processed, the product will be slightly deformed. The three-jaw chuck uses a circular bulging tire to clamp the cylindrical position, which has poor stability and easily causes the processing accuracy to exceed the tolerance. The clamping force in the Z direction is weak. The tooling positioning device used in the utility model limits the freedom of the workpiece that is not conducive to processing, making processing easier. In previous processing methods, the error exceeded 0.3mm. The tooling designed in the utility model meets the processing accuracy requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 This is a schematic diagram of the tooling structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the workpiece clamping method of the present invention.

[0017] Figure 3 This is a schematic diagram of the working principle of the tooling of this utility model.

[0018] In the figure: 1. Tool body; 2. Center positioning hole; 3. First positioning hole; 4. Positioning groove; 5. Third positioning hole; 6. Packing gland; 7. First fastening bolt; 8. Second fastening bolt; 9. T-shaped slider. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 3 As shown, an embodiment of the present utility model discloses a tool for processing a packing gland. During cutting, positioning is achieved by fasteners and the product's outer contour. The tool comprises a tool body 1. A positioning groove 4 with a certain width is provided in the middle of the upper surface of the tool body 1 along the diameter direction for installing the packing gland 6. The positioning groove is provided with a central positioning hole 2 that matches the bottom cylinder of the packing gland to be fixed and a first positioning hole 3 and a second positioning hole that match the two bolt holes of the packing gland to be fixed. The depth of the positioning hole of the tool body is greater than the depth of the bottom cylinder of the packing gland to be fixed, and there is a preset gap between the bottom of the bottom cylinder of the packing gland to be fixed and the tool body. The circular hole position is used to limit the movement of the workpiece in the X and Y directions. The positioning groove is used to limit the rotation of the workpiece in the X, Y and Z directions. The freedom of movement of the product is limited by the positioning groove of the tool body and the fastening bolts, thereby reducing the processing deformation of thin-walled workpieces.

[0021] Furthermore, during the machining process, a first fastening bolt 7 and a second fastening bolt are fitted in the first positioning hole and the second positioning hole, and the first fastening bolt is used to restrict the workpiece from moving in the Z direction.

[0022] Furthermore, the fixture body is cylindrical, with end locating slots perpendicular to the positioning slot, extending through the center positioning hole, for mounting bolts 8 for connection to the machine tool table. Third and fourth positioning holes are also provided in the end locating slots. Second fastening bolts 8 maintain the fixture and machine table in a relative static state during machining. The fixture clamping device is connected to the machine table via the second fastening bolts, or via a three-jaw chuck.

[0023] Furthermore, the end of the bolt connected to the machine tool workbench is connected to the T-shaped slide block 9 in the T-shaped groove of the machine tool workbench. The position of the tool body 1 in the machine tool is adjusted by the T-shaped slide block 9.

[0024] As an optional implementation, in actual use, the three-jaw chuck, an auxiliary device, can be connected to the machine tool, and the processing tooling can be fixed by the three-jaw chuck so that the tooling and the machine tool worktable remain relatively stationary during the processing.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A packing gland processing tool, characterized in that: It includes a tooling body, a positioning groove with a certain width is provided in the middle of the upper surface of the tooling body along the diameter direction for the installation of the packing gland, the positioning groove is provided with a central positioning hole matching the bottom cylinder of the packing gland to be fixed and a first positioning hole and a second positioning hole matching the two bolt holes of the packing gland to be fixed, the depth of the positioning hole of the tooling body is greater than the depth of the bottom cylinder of the packing gland to be fixed, and there is a preset gap between the bottom of the bottom cylinder of the packing gland to be fixed and the tooling body.

2. The packing gland processing tool according to claim 1, characterized in that: During the processing, a first bolt and a second bolt are cooperatively installed in the first positioning hole and the second positioning hole.

3. The packing gland processing tool according to claim 1, characterized in that: The tooling body is a column, and end positioning grooves for installing bolts connected to the machine tool workbench are vertically opened at both ends of the through-center positioning hole perpendicular to the positioning groove, and a third positioning hole and a fourth positioning hole are opened in the end positioning grooves.

4. The packing gland processing tool according to claim 3, characterized in that: During the machining process, the end of the bolt connected to the machine tool worktable is connected to the T-shaped sliding block in the T-shaped groove of the machine tool worktable.

5. The packing gland processing tool according to claim 1, characterized in that: During the processing, the processing tooling is fixed by a three-jaw chuck.

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