Marine engine cylinder sleeve oil filler hole grinding tool
By designing the oil-injection hole grinding tool for marine engine cylinder liner, using the closely arranged grinding bosses and flow grooves, high-precision grinding of oil-injection hole processing is achieved, solving the problem that the existing technology is difficult to meet the surface roughness and roundness requirements.
Patent Information
- Application Number
- CN202420636256.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The oil injection hole processing of marine diesel engine cylinder liner is difficult to meet the technical requirements of the finished product surface roughness of Ra0.8 and the roundness of 0.01mm. Especially due to the loose gray iron material, the inner hole cone surface and depth of 150mm of the oil injection hole are difficult to directly process through the machine tool.
A marine engine cylinder liner oil injection hole grinding tool is provided. The end of the cutter head is designed as a grinding boss with a tightly arranged and smooth transition. A flow groove is arranged between the bosses to accommodate the abrasive, and surface grinding is achieved by rotary grinding.
Through secondary grinding, the technical requirements of the workpiece surface roughness is Ra0.8 and the roundness is 0.01mm, which avoids the production of striped annular marks on the surface of the workpiece, and meets the technical requirements of angle tolerance, roundness tolerance and roughness.
Smart Images
Figure CN222570378U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of internal combustion engine cylinder sleeve processing, in particular to a marine engine cylinder sleeve oil injection hole grinding tool. Background Art
[0002] The processing of the oil injection hole of the cylinder sleeve of a marine diesel engine has high requirements for the cone angle, surface roughness and roundness. Due to the looseness of the gray iron material, it is difficult to achieve the technical requirements of Ra0.8 surface roughness and 0.01mm roundness of the finished product directly through machine tool processing due to the inner cone surface and 150mm depth of the oil injection hole. Utility Model Content
[0003] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a marine engine cylinder liner oil filling hole grinding tool, which implements secondary grinding on the basis of primary processing on the machine tool to achieve the technical requirements of surface roughness of Ra0.8 and roundness of 0.01mm.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] A marine engine cylinder liner oil filling hole grinding tool, a tool head part for machining the oil filling hole is arranged at one end of a rod body, the rod body and the tool head part are both cylindrical, the outer diameter of the tool head part is larger than the outer diameter of the rod body, the end of the tool head part is a truncated cone with a top surface and a bottom surface and a plurality of bosses for grinding are densely arranged.
[0006] In a preferred embodiment of the present invention, a flow groove is provided between each adjacent boss.
[0007] In a preferred embodiment of the present invention, the width of the flow groove is 0.3 mm.
[0008] In a preferred embodiment of the present invention, the depth of the flow groove is 0.25 mm.
[0009] In a preferred embodiment of the present invention, the diagonal length of the boss is 0.8 mm.
[0010] In a preferred embodiment of the present invention, the bottom angle of the truncated cone is 30°.
[0011] The beneficial effects of the utility model are:
[0012] The utility model provides a marine engine cylinder liner oil filling hole grinding tool, by arranging closely arranged and smoothly transitioning grinding bosses at the end of the tool head, and providing flow grooves for accommodating abrasives between the bosses. When the grinding is rotating, the grinding paste flows down from the flow grooves intermittently, thereby avoiding the generation of strip-shaped annular marks on the workpiece surface, so that the angle tolerance, roundness tolerance and roughness of the workpiece surface meet the technical requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.
[0014] Figure 1 It is an overall schematic diagram of the utility model.
[0015] Figure 2 This is a partial enlarged view of the end of the blade.
[0016] Figure 3 It is a plan view of the end of the cutter head.
[0017] Figure 4 This is a partial enlarged view of the boss. DETAILED DESCRIPTION
[0018] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings. The above description is simplified for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.
[0019] The singular forms "a", "said" and "the" used in the specification include plural forms unless clearly indicated. The terms "include", "comprises" and "comprising" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features.
[0020] In the specification, when an element is referred to as being “on,” “fixed” to, “connected to,” “engaged to,” or the like, the element may be directly on, fixed to, connected to, engaged to, or contacting the other element, or intervening elements may be present.
[0021] The following will describe exemplary embodiments of the present application with reference to the accompanying drawings. However, it should be understood that the present application can be presented in a variety of different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments. In all drawings, the same reference numerals represent the same or functionally identical elements.
[0022] Figure 1 The overall structure of a marine engine cylinder liner oil injection hole grinding tool is shown, which is mainly composed of a rod body 10 and a cutter head 20. In order to take into account both manual and machine automation operations, the cross-sections of the rod body 10 and the cutter head 20 are both designed to be circular.
[0023] refer to Figures 2 to 4 The end of the cutter head 20 is designed to be truncated cone-shaped, and a plurality of bosses 34 for directly contacting the oil filling hole for grinding are closely arranged on its inclined surface. A flow groove 35 is provided between adjacent bosses 34, which is used to divide the bosses 34 on the one hand, and to store and contain abrasives on the other hand. Preferably, the groove width of the flow groove 35 is 0.3mm and the depth is 0.25mm. The truncated cone design is to facilitate the cutter head 20 to extend into the oil filling hole and contact the workpiece with its inclined edge 33 for rotation and grinding, and the cutter head 20 can have a larger swing angle range during operation when the top truncated cone side is formed.
[0024] In one embodiment, the included angle between the oblique edge 33 and the bottom surface 32 is set to 30°.
[0025] In one embodiment, the diagonal of the boss 34 is 0.8 mm and the boss 34 is in a diamond shape when viewed from above.
[0026] Abrasive paste is applied to the end of the cutter head 20, and the cutter head 20 is inserted into the oil injection inner hole for rotational grinding. The contact between the cutter head 20 and the workpiece squeezes the abrasive paste into the flow groove 35, and the abrasive paste in the flow groove 35 is continuously thrown out as the grinding work continues. When the cutter head 20 rotates, the boss 34 fully covers the horizontal direction and smoothly transitions.
Claims
1. A marine engine cylinder liner oil filling hole grinding tool, characterized in that: A cutter head part for processing the oil filling hole is arranged at one end of the rod body, the rod body and the cutter head part are both cylindrical, the outer diameter of the cutter head part is larger than the outer diameter of the rod body, the end of the cutter head part is a truncated cone with a top surface and a bottom surface and is densely arranged with a plurality of bosses for grinding.
2. A marine engine cylinder liner oil filling hole grinding tool as claimed in claim 1, characterized in that: A flow groove is arranged between each adjacent boss.
3. A marine engine cylinder liner oil filling hole grinding tool as claimed in claim 2, characterized in that: The width of the flow channel is 0.3 mm.
4. A marine engine cylinder liner oil filling hole grinding tool as claimed in claim 2, characterized in that: The depth of the flow trough is 0.25 mm.
5. A marine engine cylinder liner oil filling hole grinding tool as claimed in claim 2, characterized in that: The diagonal length of the boss is 0.8 mm.
6. A marine engine cylinder liner oil filling hole grinding tool as claimed in any one of claims 2 to 5, characterized in that: The bottom angle of the truncated cone is 30°.