Rapid sharp edge blunt tool for broken edge piston ring

Abstract

The utility model relates to a clamping tool, in particular to a tool which is matched with an angular grinding machine and used for rapidly carrying out sharp edge blunt on an edge breaking piston ring. The utility model relates to a rapid sharp edge blunt tool for a broken edge piston ring. The tool comprises an outer circle edge blunt tool and an inner hole edge blunt tool, the outer circle edge chamfering tool is used for clamping an inner hole, the upper edge and the lower edge of a part and limiting horizontal and vertical displacement of the part so that sharp edge chamfering of the outer edge of the part can be achieved under the action of the angular grinding machine. The inner hole edge chamfering tool is used for clamping the outer circumference, the upper edge and the lower edge of a part and limiting horizontal and vertical displacement of the part, so that sharp edge chamfering of the inner edge of the part is achieved under the action of the angular grinding machine. The blunt tool has the advantages that the blunt tool is simple in structure and convenient to use, the blunt efficiency can be greatly improved, and the surface quality after blunt can be effectively controlled.

Description

Technical Field

[0001] The utility model relates to a clamping tool, in particular to a tool used for quickly blunting the sharp edge of a broken edge expansion ring in cooperation with an angle grinder. Background Art

[0002] The processing plan for broken-edge expansion rings is generally to cut the notch after turning, and then use a plane grinder to grind the upper and lower end faces. At this time, the edges of the outer circle and inner hole of the expansion ring will be in a sharp edge state. The traditional method is to use a burr to manually blunt the edge of the expansion ring to remove the sharp edge. This processing efficiency is extremely low, and the sharp edge produced is relatively rough. Utility Model Content

[0003] The utility model aims to provide a tool for quickly blunting the sharp edges of broken and expanded rings, which can effectively improve the blunting efficiency and surface quality when combined with an angle grinder.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a tool for quickly blunting the sharp edges of broken edge expansion rings, the tool comprising an outer circle edge blunting tool and an inner hole edge blunting tool; the outer circle edge blunting tool is used to clamp the inner hole and upper and lower edges of the part, limit its horizontal and vertical displacement, so that the outer edge can be blunted under the action of an angle grinder; the inner hole edge blunting tool is used to clamp the outer circumference and upper and lower edges of the part, limit its horizontal and vertical displacement, so that the inner edge can be blunted under the action of an angle grinder.

[0005] Preferably, the outer circle edge blunting tooling includes a base and a limit plate; the cross-section of the base is in a "convex" shape, and the part is inserted into its top outer circle; the limit plate is installed on the top of the base through the mounting shaft and can rotate around the mounting shaft; when the part is not inserted into the top outer circle, the limit plate is limited above the top of the base, and after the part is inserted into the top outer circle, the limit plate is rotated to press it on the upper edge of the part.

[0006] Preferably, a center hole and a pin hole are provided on the top of the base, the center hole is located at the center of the top of the base, and the pin hole is close to the top edge of the base; a through hole is provided on the limit plate, and when the part is not inserted into the outer circle of the top of the base, the limit plate is positioned by passing the pin shaft through the through hole and the center hole; after the part is inserted into the outer circle of the top, the limit plate is rotated, and the limit plate is positioned by passing the pin shaft through the through hole and the pin hole.

[0007] Preferably, the mounting shaft is a stepped structure, wherein the large shaft end is used to support the limit plate, the bottom surface of the large shaft end is fixed to the top of the base, and the small shaft end is provided with a threaded section, and the limit plate is limited to the top of the base by a nut adapted thereto.

[0008] Preferably, the inner hole edge blunting tooling includes a base, a limit plate, and a positioning plate; the cross-section of the base is in a "concave" shape, and the part is placed in the inner hole at its top; the limit plate is installed on the top of the inner hole of the base through the mounting axis and can rotate around the mounting axis; the positioning plate is installed on the top of the inner hole of the base, its radial dimension is smaller than the radial dimension of the inner hole, and one side edge of it is flush with the edge of the inner hole, thereby limiting the radial displacement of the part; when the part is not placed in the inner hole, the limit plate is limited above the inner hole of the base, and after the part is placed in the inner hole, the limit plate is rotated to press it on the upper edge of the part.

[0009] Preferably, a center hole and a pin hole are provided on the positioning plate, the center hole is located at the center of the inner hole of the base, and the pin hole is close to the edge of the inner hole of the base; a through hole is provided on the limiting plate, and when the part is not placed in the inner hole of the base, the limiting plate is positioned by passing the pin shaft through the through hole and the center hole; after the part is placed in the inner hole, the limiting plate is rotated, and the limiting plate is positioned by passing the pin shaft through the through hole and the pin hole.

[0010] Preferably, the mounting shaft is a stepped structure, with its large shaft end being used to support the limit plate, the bottom surface of the large shaft end being fixed to the positioning plate, and its small shaft end being provided with a threaded section, and the limit plate being limited to the top of the inner hole of the base by a nut adapted thereto.

[0011] Preferably, the outer circle or inner hole of the base and the parts are fitted with a clearance fit.

[0012] Principle: This tooling consists of two sets: an outer edge blunting tool and an inner hole edge blunting tool. Both sets have similar structures. To use, simply mount the part on the base and screw on the limit plate to complete the installation. Then, attach the sandpaper disc to the angle grinder and hold it close to the sharp edge of the part to quickly blunt the sharp edge.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the blunting tooling has a simple structure and is easy to use, which can not only greatly improve the blunting efficiency, but also effectively control the surface quality after blunting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the tooling structure for blunting the outer circular edge in an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the tooling structure for blunting the inner hole edge in an embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of a processed part in an embodiment of the present utility model (the outer edge of the processed part);

[0017] Figure 4 This is a schematic diagram of a processed part in an embodiment of the present utility model (edge ​​of the inner hole of the processed part);

[0018] Figure 5This is an exploded view of the fixture clamping parts with blunt outer edges in the embodiment of the utility model;

[0019] Figure 1 In the figure, 1-1, taper pin; 1-2, nut; 1-3, rotating cover; 1-4, part to be processed; 1-5, tooling base;

[0020] Figure 2 In the figure, 2-1, taper pin; 2-2, nut; 2-3, rotating cover; 2-4, part to be processed; 2-5, tooling base; 2-6, positioning plate;

[0021] Figure 3 1. Tooling for blunting the outer edge of a circle; 3. Parts to be processed; 4. Sandpaper; 5. Blunting the edge of a part; 6. Angle grinder;

[0022] Figure 4 2. Tooling for blunting the edge of the inner hole; 6. Angle grinder. DETAILED DESCRIPTION

[0023] It should be noted that the terms "inside," "outside," "upper," and "lower" are used in accordance with the drawings or common usage, and do not limit the present invention. Those skilled in the art should understand the terms in accordance with the technical solutions of the present invention.

[0024] The following is combined with Figure 1-5 The utility model is further described in detail: a tool for quickly blunting the sharp edges of broken and expanded rings, the tool comprising an outer circle edge blunting tool 1 and an inner hole edge blunting tool 2; the outer circle edge blunting tool 1 is used to clamp the inner hole and upper and lower edges of the part, limit its horizontal and vertical displacement, so that the outer edge can be blunted under the action of the angle grinder; the inner hole edge blunting tool 2 is used to clamp the outer circumference and upper and lower edges of the part, limit its horizontal and vertical displacement, so that the inner edge can be blunted under the action of the angle grinder.

[0025] In this embodiment, the specific structure is as follows:

[0026] like Figure 1 、 5 As shown, the tool 1 for blunting the outer circle edge includes a tapered pin 1-1, a nut 1-2, a rotating cover 1-3, and a tool base 1-5; the tool base 1-5 has a "convex" cross-section, and the part to be processed 1-4 is inserted into its top outer circle; the rotating cover 1-3 is installed on the top of the tool base 1-5 through the mounting axis A as a limit plate and can rotate around the mounting axis A; when the part to be processed 1-4 is not inserted into the top outer circle, the rotating cover 1-3 is limited above the top of the tool base; after the part to be processed 1-4 is inserted into the top outer circle, the rotating cover 1-3 is rotated to press it on the upper edge of the part to be processed;

[0027] As a preferred implementation of this embodiment, a center hole and a pin hole are provided on the top of the tooling base, the center hole is located at the center of the top of the tooling base 1-5, and the pin hole is close to the top edge of the tooling base; a through hole is provided on the rotating cover 1-3, and the number of through holes is two, namely through hole A and through hole B. The inner diameter of through hole A is adapted to the outer diameter of the mounting shaft A. When the part 1-4 to be processed is not inserted into the outer circle of the top of the tooling base, the rotating cover 1-3 is positioned by passing the tapered pin 1-1 through the through hole B and the center hole; after the part 1-4 to be processed is inserted into the outer circle of the top, the rotating cover 1-3 is rotated, and the rotating cover 1-3 is positioned by passing the tapered pin 1-1 through the through hole B and the pin hole;

[0028] As a preferred implementation of this embodiment, the mounting shaft A is a stepped structure, the large shaft end of which is used to support the rotating cover 1-3, the bottom surface of the large shaft end is fixed to the top of the tooling base 1-5, and the small shaft end is provided with a threaded section, and the rotating cover 1-3 is confined to the top of the tooling base by a nut 1-2 adapted thereto.

[0029] like Figure 2 As shown, the inner hole edge blunting tool 2 includes a tapered pin 2-1, a nut 2-2, a rotating cover 2-3, a part to be processed 2-4, a tool base 2-5 and a positioning plate 2-6; the cross-section of the tool base 2-5 is in a "concave" shape, and the part to be processed 2-4 is placed in the inner hole at its top; the rotating cover 2-3 is installed on the top of the inner hole of the tool base 2-5 through the mounting shaft as a limit plate, and can rotate around the mounting axis B; the positioning plate 2-6 is installed on the top of the inner hole of the tool base 2-5, and its radial dimension is smaller than the radial dimension of the inner hole, and one side edge of it is flush with the edge of the inner hole, thereby limiting the radial displacement of the part to be processed 2-4; when the part to be processed 2-4 is not placed in the inner hole, the rotating cover 2-3 is limited above the inner hole of the tool base 2-5. After the part to be processed 2-4 is placed in the inner hole, the rotating cover 2-3 is rotated to press it on the upper edge of the part to be processed 2-4.

[0030] As a preferred implementation scheme of this embodiment, a center hole and a pin hole are provided on the positioning plate 2-6. The center hole is located at the center of the inner hole of the tooling base 2-5, and the pin hole is close to the edge of the inner hole of the tooling base 2-5. A through hole is provided on the rotating cover 2-3. There are two through holes, namely through hole C and through hole D. The inner diameter of through hole C is adapted to the outer diameter of the mounting shaft B. When the part 2-4 to be processed is not placed in the inner hole of the tooling base 2-5, the rotating cover 2-3 is positioned by passing the tapered pin 2-1 through the through hole and the center hole. After the part 2-4 to be processed is placed in the inner hole, the rotating cover 2-3 is rotated, and the rotating cover 2-3 is positioned by passing the tapered pin 2-1 through the through hole and the pin hole.

[0031] As a preferred implementation of this embodiment, the mounting shaft B is a stepped structure, the large shaft end of which is used to support the rotating cover 2-3, the bottom surface of the large shaft end is fixed to the positioning plate 2-6, and the small shaft end is provided with a threaded section, and the rotating cover 2-3 is confined to the top of the inner hole of the tooling base 2-5 by a nut 2-2 adapted thereto.

[0032] As a preferred implementation of this embodiment, the outer circle or inner hole of the tooling base and the workpiece to be processed are both clearance fit to prevent the friction force from being insufficient to drive the workpiece to be processed to rotate during processing.

[0033] like Figure 3-4 As shown, after the part to be machined is mounted on the tooling, the sandpaper disc 4 is installed on the angle grinder 6. The sandpaper disc is then moved close to the part's blunt edge 5. The rapidly rotating sandpaper disc naturally forms a slight extrusion deformation similar to an R angle, thereby grinding the sharp edge. At the same time, the friction generated by the grinding is applied to the part to be machined. The freedom of the part to be machined is restricted by the tooling, and due to the friction, it can only rotate along the tooling axis. After the part to be machined rotates several times, the sharp edge is blunted accordingly. The working principles of internal and external blunting are exactly the same.

[0034] like Figure 5 As shown, the clamping method of the outer circle edge blunting tool 1 is: in the initial state of the tool, the rotating cover 1-3 is at the center of the tool, and the tapered pin 1-1 is inserted in the center position accordingly. At this time, there is enough space for the part 1-4 to be processed to be placed on the central axis of the tool base 1-5. Pull out the tapered pin 1-1, adjust the rotating cover 1-3 to block the part 1-4 to be processed, and prevent the part 1-4 to be processed from falling off the tool during processing, and then insert the tapered pin 1-1 into another tapered hole at the tool base to fix it; the inner hole edge blunting tool 2 is used in the same way.

[0035] Different types of sandpaper can be selected according to actual conditions. The finer the sandpaper, the better the quality of the blunt edge surface, but the processing efficiency will be relatively reduced. This tooling can be used not only for expanding rings, but also for blunting the sharp edges of some rotating parts such as washers and bushings. By replacing the grinding wheel with wool felt or polishing cloth, the R angle of the outer circle (inner hole) edge of the part can be polished.

Claims

1. A tool for quickly blunting the sharp edge of a broken edge expansion ring, characterized by: The tooling includes an outer circle edge blunting tooling and an inner hole edge blunting tooling; the outer circle edge blunting tooling is used to clamp the inner hole and upper and lower edges of the part, limit its horizontal and vertical displacement, so that the outer edge can be blunted under the action of the angle grinder; the inner hole edge blunting tooling is used to clamp the outer circumference and upper and lower edges of the part, limit its horizontal and vertical displacement, so that the inner edge can be blunted under the action of the angle grinder.

2. The tool for quickly blunting sharp edges of broken and expanded rings according to claim 1 is characterized by: The outer circle edge blunting tooling includes a base and a limit plate; the cross-section of the base is "convex" shaped, and the part is inserted into its top outer circle; the limit plate is installed on the top of the base through the mounting axis and can rotate around the mounting axis; when the part is not inserted into the top outer circle, the limit plate is limited above the top of the base. After the part is inserted into the top outer circle, the limit plate is rotated to press it on the upper edge of the part.

3. The tool for quickly blunting sharp edges of broken and expanded rings according to claim 2 is characterized in that: A center hole and a pin hole are provided on the top of the base. The center hole is located in the center of the top of the base, and the pin hole is close to the top edge of the base. A through hole is provided on the limit plate. When the part is not inserted into the outer circle of the top of the base, the limit plate is positioned by passing the pin shaft through the through hole and the center hole. After the part is inserted into the outer circle of the top, the limit plate is rotated, and the limit plate is positioned by passing the pin shaft through the through hole and the pin hole.

4. The tool for rapidly blunting sharp edges of broken and expanded rings according to claim 2 is characterized in that: The mounting shaft is a stepped structure, with its large shaft end used to support the limit plate. The bottom surface of the large shaft end is fixed to the top of the base, and its small shaft end is provided with a threaded section, and the limit plate is limited to the top of the base by a nut adapted thereto.

5. The tool for quickly blunting sharp edges of broken and expanded rings according to claim 1 is characterized in that: The inner hole edge blunting tooling includes a base, a limit plate, and a positioning plate; the cross-section of the base is in a "concave" shape, and the part is placed in the inner hole at its top; the limit plate is installed on the top of the inner hole of the base through the mounting axis and can rotate around the mounting axis; the positioning plate is installed on the top of the inner hole of the base, its radial dimension is smaller than the radial dimension of the inner hole, and one side edge of it is flush with the edge of the inner hole, thereby limiting the radial displacement of the part; when the part is not placed in the inner hole, the limit plate is limited above the inner hole of the base. After the part is placed in the inner hole, the limit plate is rotated to press it on the upper edge of the part.

6. The tool for quickly blunting sharp edges of broken and expanded rings according to claim 5, characterized in that: A center hole and a pin hole are provided on the positioning plate. The center hole is located at the center of the inner hole of the base, and the pin hole is close to the edge of the inner hole of the base. A through hole is provided on the limiting plate. When the part is not placed in the inner hole of the base, the limiting plate is positioned by passing the pin shaft through the through hole and the center hole. After the part is placed in the inner hole, the limiting plate is rotated, and the limiting plate is positioned by passing the pin shaft through the through hole and the pin hole.

7. The tool for rapidly blunting sharp edges of edge-breaking and expansion rings according to claim 5 is characterized in that: The mounting shaft is a stepped structure, with its large shaft end used to support the limit plate. The bottom surface of the large shaft end is fixed to the positioning plate, and its small shaft end is provided with a threaded section, and the limit plate is limited to the top of the inner hole of the base by a nut adapted thereto.

8. The tool for quickly blunting sharp edges of edge-breaking and expansion rings according to claim 2 or 5, characterized in that: The fit between the outer circle or inner hole of the base and the parts adopts clearance fit.

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