Quick replacement type valve rod outer circle rolling cutter

Abstract

The utility model relates to a quick replacement type valve rod outer circle rolling cutter which is provided with a cutter handle, the cutter handle comprises a clamping portion and an installation portion which are of an integrated structure, an axial sliding groove and a radial pin hole which are perpendicular to each other are formed in the installation portion, a bearing is installed in the axial sliding groove, a pin is fixed in the radial pin hole, and the pin is in interference fit with an inner ring of the bearing. A pressing ring is connected to the end of the mounting portion, steel balls are arranged between the pressing ring and the bearing outer ring, the inner sides of the steel balls make contact with the bearing outer ring, the outer sides of the steel balls protrude out of the outer end face of the pressing ring, and an adjusting gasket is clamped between the pressing ring and the mounting portion. The steel ball is in contact with the surface of the valve rod, the steel ball is in contact with the outer ring of the bearing, the valve rod serves as a part needing to be rolled and polished, the steel ball and the bearing serve as stress pieces in the rolling process, and due to the fact that the hardness difference between the steel ball and the valve rod is small, the surface roughness of the rolled valve rod can be effectively improved; and meanwhile, the steel balls and the bearings serve as standard parts, so that the rolling cutter can be quickly replaced after being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a quick-change valve stem outer circle rolling cutter. Background Art

[0002] With the diversification of valve application conditions, higher requirements are placed on the performance of valves. For special valves, they are customized products produced in single pieces and small batches, and specific tools are required for the processing of specific products.

[0003] During the inspection and maintenance of valves, since they are repairing old parts, the design dimensions of each manufacturer are somewhat different. As for the valve stem, there is a packing for sealing at the valve stem, and the roughness of the outer circle of the valve stem is very high.

[0004] For newly processed valve stems, special cylindrical grinders can be used for grinding to ensure the outer roughness of the valve stem; however, in the process of repairing old parts, since the parts are different, special grinders cannot be used effectively, so rolling is generally used to repair the outer roughness of the valve stem. In the existing rolling cutter structure, the rolling head is mostly made of metal carbide, but due to the high hardness of the carbide, it is very easy to damage the valve stem during the rolling process.

[0005] Therefore, it is necessary to provide a multi-purpose valve stem outer circle rolling tool that can be quickly replaced to ensure the hardness and roughness of the outer circle of the repaired valve stem. Summary of the invention

[0006] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a quick-change valve stem outer circle rolling cutter.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a quick-change valve stem outer circle rolling cutter, with a tool handle, the tool handle includes a clamping part and a mounting part of an integral structure, the mounting part is provided with axial slide grooves and radial pin holes perpendicular to each other, a bearing is installed in the axial slide groove, a pin is fixed in the radial pin hole, the pin is interference fit with the inner ring of the bearing, a pressure ring is connected to the end of the mounting part, a steel ball is provided between the pressure ring and the outer ring of the bearing, the inner side of the steel ball contacts the outer ring of the bearing, the outer side of the steel ball protrudes outside the outer end surface of the pressure ring, and an adjustment gasket is clamped between the pressure ring and the mounting part.

[0008] Specifically, the clamping part is a rectangular body, the mounting part is a cylindrical body, the outer periphery of the cylindrical body of the mounting part is provided with an upper plane and a lower plane symmetrical to the axis, and the radial pin hole is provided between the upper plane and the lower plane.

[0009] Furthermore, the pressing ring has an internal thread, the outer periphery of the cylindrical end of the mounting portion has an external thread matching the internal thread of the pressing ring, a tapered hole is provided in the center of the pressing ring, and the steel ball protrudes out of the outer end surface of the pressing ring through the tapered hole.

[0010] Furthermore, both ends of the pin are respectively clamped with retaining springs, and the retaining springs are respectively tightly attached to the upper plane and the lower plane of the cylinder to fix the pin.

[0011] Preferably, the two side surfaces of the bearing are clearance-matched with the axial sliding groove, so that a certain adjustment clearance can be provided during the rotation of the bearing.

[0012] The beneficial effects of the utility model are as follows: the utility model adopts the contact between the steel ball and the valve stem surface, the contact between the steel ball and the outer ring of the bearing, and at the same time there is relative movement between the steel ball, the bearing and the valve stem. The valve stem is a component that needs to be rolled and polished. During the rolling process, the force-bearing parts are the steel ball and the bearing. The hardness difference between the steel ball and the valve stem is small, which can effectively improve the surface roughness of the valve stem after rolling. At the same time, the steel ball and the bearing are standard parts, which facilitates the rapid replacement of the rolling knife after damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the pressure ring of the utility model.

[0016] Figure 3 It is a structural schematic diagram of the knife handle of the utility model.

[0017] Figure 4 yes Figure 3 Left view of .

[0018] In the figure: 1. tool handle, 1-1. clamping part, 1-2. mounting part, 1-3. axial slide groove, 1-4. radial pin hole, 2. bearing, 3. pin, 4. pressure ring, 4-1. tapered hole, 5. steel ball, 6. adjustment gasket, 7. retaining ring. DETAILED DESCRIPTION

[0019] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0020] like Figure 1 , Figure 3 , Figure 4A quick-change valve stem external cylindrical rolling tool is shown, having a tool handle 1, wherein the tool handle 1 includes a clamping portion 1-1 and a mounting portion 1-2 of an integral structure. The tool handle 1 is a component installed on a lathe tool holder, wherein the clamping portion 1-1 is designed as a rectangular body according to the shape of a conventional lathe tool handle, and the mounting portion 1-2 is designed as a cylinder, which includes a large cylinder and a small cylinder. The large cylinder is fixedly connected to the rectangular body of the clamping portion 1-1, and the outer periphery of the large cylinder has an upper plane and a lower plane symmetrical to the axis, and the outer periphery of the small cylinder is processed with an external thread.

[0021] An axial groove 1-3 is opened from the end surface of the small cylinder of the mounting part 1-2 to the large cylinder, and a radial pin hole 1-4 which is perpendicular to the axial groove 1-3 is opened from the upper plane to the lower plane of the large cylinder. A bearing 2 is installed in the axial groove 1-3, and the two side surfaces of the bearing 2 are clearance-matched with the axial groove 1-3, so that there is a certain adjustment clearance between the upper and lower sides during the rotation of the bearing 2 to prevent jamming; a pin 3 is fixed in the radial pin hole 1-4, and the pin 3 is interference-fitted with the inner ring of the bearing 2, and retaining springs 7 are respectively clamped at both ends of the pin 3, and the retaining springs 7 are respectively tightly attached to the upper and lower planes of the cylindrical body of the mounting part 1-2 to fix the pin 3.

[0022] The end of the small cylinder of the mounting part 1-2 is connected with a pressure ring 4, such as Figure 2 As shown, the pressing ring 4 has an inner cavity, and an internal thread matching the external thread on the outer periphery of the small cylinder of the mounting part 1-2 is opened on the circumferential wall of the inner cavity of the pressing ring 4, and a tapered hole 4-1 with a small end facing outward is opened in the center of the bottom wall of the inner cavity of the pressing ring 4, and a steel ball 5 is arranged in the tapered hole 4-1, and the inner side of the steel ball 5 contacts the outer ring of the bearing 2, and the outer side of the steel ball 5 protrudes out of the outer end face of the pressing ring 4, and an adjusting gasket 6 made of polytetrafluoroethylene is clamped between the end face of the pressing ring 4 and the end face of the small cylinder of the mounting part 1-2, and the clamping force of the steel ball 5 is adjusted by adjusting the gasket 6 to ensure that the steel ball 5 can rotate freely after assembly.

[0023] During rolling, the valve stem is clamped on the lathe chuck, and the lathe drives the valve stem to rotate. The rolling cutter is clamped on the lathe tool holder. By feeding the tool holder forward, the steel ball 5 at the front end of the rolling cutter contacts the outer circle of the valve stem. The contact at this time is point contact. The bearing 2 serves as a support for the steel ball 5. During the rotation of the valve stem, the valve stem and the steel ball 5 produce relative movement, and there is relative movement between the steel ball 5 and the bearing 2. When the tool holder continues to feed forward, the rolling cutter and the outer peripheral surface of the valve stem produce a relative interference fit to achieve polishing and rolling of the valve stem surface and improve the surface roughness of the outer periphery of the valve stem.

[0024] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A quick-change valve stem outer cylindrical rolling cutter, comprising a cutter handle (1), wherein the cutter handle (1) comprises a clamping portion (1-1) and a mounting portion (1-2) of an integral structure, wherein: The mounting portion (1-2) is provided with an axial groove (1-3) and a radial pin hole (1-4) which are perpendicular to each other. A bearing (2) is installed in the axial groove (1-3). A pin (3) is fixed in the radial pin hole (1-4). The pin (3) is interference fit with the inner ring of the bearing (2). A pressure ring (4) is connected to the end of the mounting portion (1-2). A steel ball (5) is provided between the pressure ring (4) and the outer ring of the bearing (2). The inner side of the steel ball (5) contacts the outer ring of the bearing (2). The outer side of the steel ball (5) protrudes outside the outer end surface of the pressure ring (4). An adjustment gasket (6) is clamped between the pressure ring (4) and the mounting portion (1-2).

2. The quick-change valve stem outer cylindrical rolling cutter according to claim 1, characterized in that: The clamping part (1-1) is a rectangular body, the mounting part (1-2) is a cylindrical body, the cylindrical outer periphery of the mounting part (1-2) has an upper plane and a lower plane with axial symmetry, and the radial pin hole (1-4) is opened between the upper plane and the lower plane.

3. The quick-change valve stem outer cylindrical rolling cutter according to claim 2, characterized in that: The pressing ring (4) has an internal thread, the outer periphery of the cylindrical end of the mounting portion (1-2) has an external thread that matches the internal thread of the pressing ring (4), a tapered hole (4-1) is opened in the center of the pressing ring (4), and the steel ball (5) protrudes from the outer end surface of the pressing ring (4) through the tapered hole (4-1).

4. The quick-change valve stem outer cylindrical rolling cutter according to claim 2, characterized in that: The two ends of the pin (3) are respectively clamped with a clamping spring (7), and the clamping spring (7) is respectively tightly attached to the upper plane and the lower plane of the cylindrical body of the mounting part (1-2) to fix the pin (3).

5. The quick-change valve stem outer cylindrical rolling cutter according to claim 1, characterized in that: The two side surfaces of the bearing (2) are clearance-matched with the axial sliding groove (1-3).

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