Rolling shaft sleeve oil hole chamfering tool

Abstract

The utility model relates to the technical field of rolled shaft sleeve machining, in particular to a rolled shaft sleeve oil hole chamfering tool which comprises an upper die frame and a lower die frame, and an upper chamfering punch and a lower chamfering punch are arranged on the opposite sides of the upper die frame and the lower die frame respectively. An upper chamfering conical surface and a lower chamfering conical surface are respectively arranged on the opposite sides of the upper chamfering punch and the lower chamfering punch, the upper chamfering conical surface is used for chamfering one side of the oil hole, and the lower chamfering conical surface is used for chamfering the other side of the oil hole. When the chamfering die is used, an oil hole of a sheet material is placed on the lower chamfering conical surface, when the upper die frame punches downwards, the upper die frame drives the upper chamfering punch to approach the lower chamfering punch, the oil hole is extruded by the upper chamfering conical surface and the lower chamfering conical surface, chamfering conical surfaces are formed on the front surface and the back surface of the oil hole, so that burrs at the periphery of the oil hole are removed, and the quality of the sheet material is improved. The whole structure is simple, operation is convenient, and production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rolled shaft sleeve processing, in particular to a tool for chamfering oil holes of rolled shaft sleeves. Background Art

[0002] Wound sleeves, as precision mechanical components, are primarily manufactured through a precision rolling process using specially selected bearing materials or steel strips coated with a bearing alloy. These sleeves, with their thin-walled structure and sophisticated design, are widely used in various rotating machinery to reduce friction and improve operating efficiency. To meet specific lubrication requirements, some rolled sleeves are designed with oil holes during the manufacturing process. These holes ensure that the appropriate amount of lubricant is evenly distributed to the bearing working surface after the sleeve is put into use, further reducing wear and extending service life.

[0003] However, in the preparation stage before sleeve rolling, punching and forming the oil hole is a crucial step, which also comes with certain challenges. Since the sheet material is made of metal, the metal material is prone to plastic deformation and fracture during the punching process, resulting in the formation of small burrs on the edges of the oil hole. These burrs not only affect the aesthetics of the sleeve, but more importantly, they interfere with the smooth flow of lubricant and may even cause additional friction and wear during the operation of the sleeve, affecting the overall performance of the equipment. Traditionally, the method of removing these burrs mainly relies on manual scraping, but this method has obvious limitations. On the one hand, manual operation cannot ensure that the burrs are completely removed, especially in hidden locations inside the oil hole or on the edge. On the other hand, manual deburring is inefficient and far from meeting the needs of large-scale, high-efficiency production. Especially in the context of modern manufacturing's pursuit of automation and intelligence, this method that relies on manual labor is obviously outdated.

[0004] In view of this, we propose a tool for chamfering the oil hole of a rolled sleeve. Utility Model Content

[0005] The purpose of the present utility model is to provide a tool for chamfering the oil hole of a rolled shaft sleeve to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A tool for chamfering the oil hole of a rolled shaft sleeve comprises an upper die frame and a lower die frame, wherein an upper chamfering punch and a lower chamfering punch are respectively provided on opposite sides of the upper die frame and the lower die frame, and an upper chamfering cone surface and a lower chamfering cone surface are respectively provided on opposite sides of the upper chamfering punch and the lower chamfering cone surface, wherein the upper chamfering cone surface chamfers one side of the oil hole, and the lower chamfering cone surface chamfers the other side of the oil hole.

[0008] As a further solution of the present invention: a positioning pin is further provided on the side of the lower chamfered cone surface away from the lower chamfering punch, and the positioning pin is used for positioning the oil hole of the sheet.

[0009] As a further solution of the present invention: an upper die fixing plate is installed between the upper die frame and the upper chamfering punch; a lower die fixing plate is installed between the lower die frame and the lower chamfering punch.

[0010] As a further solution of the present invention: a die handle is provided on a side of the upper die frame away from the upper chamfering punch, and the die handle is fixed to the output end of the punch press.

[0011] As a further solution of the present invention: a guide sleeve and a fixed column are respectively provided on opposite sides of the upper mold frame and the lower mold frame, and the fixed column is slidably connected in the guide sleeve.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the rolled sleeve oil hole chamfering tool, the oil hole of the sheet is placed on the lower chamfered cone surface. When the upper die frame punches downward, the upper die frame drives the upper chamfering punch closer to the lower chamfering punch. The upper chamfered cone surface and the lower chamfered cone surface are used to squeeze the oil hole against each other, forming chamfered cone surfaces on the front and back sides of the oil hole, thereby removing burrs around the oil hole. The overall structure is simple, the operation is convenient, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0015] Figure 2 This is a schematic diagram of the entire device processing of this scheme;

[0016] Figure 3 for Figure 2 Enlarged view of point A.

[0017] The meaning of each number in the figure is:

[0018] 100, upper die frame; 101, die handle; 102, upper die fixing plate; 103, upper chamfering punch; 104, upper chamfered cone surface; 105, guide sleeve;

[0019] 200, lower die frame; 201, lower die fixing plate; 202, lower chamfered punch; 203, lower chamfered cone surface; 204, positioning pin; 205, fixing column. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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.

[0021] Example

[0022] At present, in the preparation stage before sleeve rolling, punching and forming the oil hole is a crucial step. However, since the sheet material is made of metal, the metal material is prone to plastic deformation and fracture during the punching process, resulting in the formation of tiny burrs on the edges of the oil hole. These burrs not only affect the appearance of the sleeve, but more importantly, they interfere with the smooth flow of lubricant and may even cause additional friction and wear during the operation of the sleeve, affecting the overall performance of the equipment. The traditional method of removing these burrs mainly relies on manual scraping, which can neither guarantee that the burrs are removed nor meet the needs of large-scale, high-efficiency production.

[0023] Therefore, see Figure 1 、 Figure 2 and Figure 3 As shown, the present embodiment aims to provide a tool for chamfering the oil hole of a rolled sleeve, the tool comprising an upper die frame 100 and a lower die frame 200, an upper chamfering punch 103 and a lower chamfering punch 202 being mounted on opposite sides of the upper die frame 100 and the lower die frame 200, and an upper chamfering cone 104 and a lower chamfering cone 203 being mounted on opposite sides of the upper chamfering punch 103 and the lower chamfering punch 202.

[0024] During stamping, the conical surfaces of the upper chamfered punch 103 and the lower chamfered punch 202 are used to squeeze the oil hole against each other, forming chamfered conical surfaces on the front and back sides of the oil hole. When the punch gradually withdraws from the hole, its conical design can gradually reduce the contact area between the punch and the hole wall, thereby reducing the squeezing and friction on the hole wall and avoiding the formation of sharp burrs at the hole mouth. The conical design can also guide the generated burrs. During the stamping process, the burrs will be guided and removed along the tapered inclined surface instead of remaining at the hole mouth. At the same time, the conical design helps to reduce stress concentration at the hole mouth. By changing the shape of the hole mouth, the degree of stress concentration can be reduced, thereby reducing the generation of burrs.

[0025] The improvement of this embodiment is that the oil hole of the sheet is placed on the lower chamfered cone surface 203. When the upper die frame 100 presses downward, the upper die frame 100 drives the upper chamfered punch 103 to approach the lower chamfered punch 202. The upper chamfered cone surface 104 and the lower chamfered cone surface 203 squeeze the oil hole against each other, forming chamfered cone surfaces on both the front and back sides of the oil hole, thereby removing burrs around the oil hole. The overall structure is simple, the operation is convenient, and the production efficiency is improved.

[0026] In order to facilitate the alignment of the oil hole of the sheet material with the lower chamfered cone surface 203 and reduce the possibility of stamping failure and defective products due to the misalignment of the oil hole with the upper chamfered cone surface 104 and the lower chamfered cone surface 203 during stamping, a positioning pin 204 is welded on the side of the lower chamfered cone surface 203 away from the lower chamfered punch 202. By using the positioning pin 204, the oil hole can be embedded in the lower chamfered cone surface 203, thereby ensuring the success rate of oil hole stamping.

[0027] In order to facilitate the installation and fixation of the upper chamfering punch 103 and the lower chamfering punch 202, an upper die fixing plate 102 is installed between the upper die frame 100 and the upper chamfering punch 103; a lower die fixing plate 201 is installed between the lower die frame 200 and the lower chamfering punch 202. The upper die fixing plate 102 and the lower die fixing plate 201 are used to carry and fix various parts of the die. By fixing these parts, the stability and accuracy of the die during the stamping process are ensured.

[0028] In order to facilitate the connection of an external punching machine and realize automated stamping, a die handle 101 is welded to the side of the upper die frame 100 away from the upper chamfer punch 103. The die handle 101 is fixed to the output end of the punching machine. When the output end of the punching machine reciprocates up and down, the die handle 101 drives the upper die frame 100 to move synchronously, thereby stamping the oil hole.

[0029] In order to avoid the upper mold frame 100 from offsetting when moving, resulting in the upper chamfered cone surface 104 and the lower chamfered cone surface 203 being misaligned, causing the oil hole after stamping to be defective, therefore, a guide sleeve 105 and a fixed column 205 are welded on the opposite sides of the upper mold frame 100 and the lower mold frame 200 respectively. The fixed column 205 is slidably connected in the guide sleeve 105. The moving direction of the upper mold frame 100 is limited by the fixed column 205 and the guide sleeve 105, thereby improving the accuracy of the upper chamfered cone surface 104 and the lower chamfered cone surface 203.

[0030] In summary, the working principle of this solution is as follows:

[0031] Embed the oil hole of the sheet material on the positioning pin 204 of the lower chamfering punch 202, start the punch press, and drive the upper die frame 100 to punch downward through the die handle 101, and use the upper chamfered cone surface 104 and the lower chamfered cone surface 203 to squeeze the oil hole against each other, forming chamfered cone surfaces on the front and back sides of the oil hole. After reaching the bottom dead center, the punch press drives the upper die frame 100 to return to the top dead center, remove the sheet material from the lower chamfering punch 202, complete the oil hole chamfering, replace another sheet material to be processed, and repeat the above operation.

[0032] Although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0033] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent modifications made according to the scope of the claims of the present application are within the scope of protection of the claims of the present application.

Claims

1. A tool for chamfering oil holes of rolled sleeves, comprising an upper die frame (100) and a lower die frame (200), characterized in that: An upper chamfering punch (103) and a lower chamfering punch (202) are respectively provided on opposite sides of the upper die frame (100) and the lower die frame (200), and an upper chamfering cone surface (104) and a lower chamfering cone surface (203) are respectively provided on opposite sides of the upper chamfering punch (103) and the lower chamfering cone surface (203), wherein the upper chamfering cone surface (104) chamfers one side of the oil hole, and the lower chamfering cone surface (203) chamfers the other side of the oil hole.

2. The tool for chamfering the oil hole of a rolled sleeve according to claim 1, characterized in that: A positioning pin (204) is further provided on the side of the lower chamfered cone surface (203) away from the lower chamfered punch (202), and the positioning pin (204) is used for positioning the oil hole of the sheet material.

3. The tool for chamfering the oil hole of a rolled sleeve according to claim 1, characterized in that: An upper die fixing plate (102) is installed between the upper die frame (100) and the upper chamfering punch (103); and a lower die fixing plate (201) is installed between the lower die frame (200) and the lower chamfering punch (202).

4. The tool for chamfering the oil hole of a rolled sleeve according to claim 1, characterized in that: A die handle (101) is provided on one side of the upper die frame (100) away from the upper chamfering punch (103), and the die handle (101) is fixed to the output end of the punch press.

5. The tool for chamfering the oil hole of a rolled sleeve according to claim 1, characterized in that: A guide sleeve (105) and a fixed column (205) are respectively provided on opposite sides of the upper mold frame (100) and the lower mold frame (200), and the fixed column (205) is slidably connected in the guide sleeve (105).

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