Cylinder cover cast iron valve guide pipe multi-cutting-edge machining cutter

Abstract

The utility model provides a cylinder cover cast iron valve guide pipe multi-cutting-edge machining cutter, and belongs to the technical field of cutters. Comprising a connecting base, a guide column and a cutting head, the connecting base is used for being connected with a tool body, the guide column is arranged on the connecting base, the cutting head is arranged at the end, away from the connecting base, of the guide column, a plurality of cutting blades used for polishing guide pipe holes are arranged on the outer wall of the cutting head, and the maximum outer diameter of the guide column is the same as the hole diameter of rotating polishing of the cutting blades. After the cutting head completely enters the guide pipe hole, the guide column can enter the guide pipe hole along with the cutting head, the outer wall of the guide column makes contact with the inner wall of the polished guide pipe hole, deviation of the cutting head in the follow-up polishing process can be limited, the size deviation of the machined guide pipe hole is reduced, and the effect of specifically improving the machining precision of the guide pipe hole is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a multi-edge machining tool for a cylinder head cast iron valve guide. Background Art

[0002] As one of the key parts of the engine, the machining accuracy of the cylinder head directly determines the performance of the whole machine. The machining of the cylinder head seat ring and the valve guide hole is particularly important. The same non-standard tool is often used to process the seat ring and the valve guide hole in one go to ensure the size requirements.

[0003] When machining cast iron valve guides, a reamer is usually used to extend into the guide hole along the axial direction of the valve guide and grind the inner wall of the guide hole. When the reamer moves and grinds the guide hole, it will be subjected to force and vibration, and the valve guide is relatively long, which can easily cause the shape tolerance of the processed guide hole to exceed the tolerance, thereby causing valve leakage and affecting the emission performance of the entire machine. Utility Model Content

[0004] In view of the above problems, the utility model provides a multi-edge machining tool for a cast iron valve guide of a cylinder head.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is as follows:

[0006] A multi-blade machining tool for a cylinder head cast iron valve guide is provided, which is used to be installed on a tool body and comprises a connecting seat, a guide column and a cutting head. The connecting seat is used to be connected to the tool body, the guide column is arranged on the connecting seat, the cutting head is arranged at an end of the guide column away from the connecting seat, and a plurality of cutting blades for grinding the guide tube hole are arranged on the outer wall of the cutting head. The maximum outer diameter of the guide column is the same as the hole diameter grinded by the cutting blade.

[0007] Furthermore, a plurality of notches for allowing grinding debris to pass through are provided on the outer wall of the guide column along its circumference.

[0008] Furthermore, an installation groove for inserting a cutting head is formed at one end of the guide column away from the connecting seat, a connecting piece is provided between the guide column and the cutting head, the connecting piece includes a top screw, a through hole connected to the installation groove is formed along the radial direction of the guide column outer wall, a threaded hole with a size matching the top screw is formed on the outer wall of the cutting head, the top screw is passed through the through hole and is threadedly connected to the threaded hole, and the cutting tool is located at the part of the cutting head that extends beyond the guide column.

[0009] Furthermore, a guide head for inserting into the catheter hole is provided at one end of the cutting head away from the guide column.

[0010] Furthermore, a positioning boss for inserting into the tool body is provided on the connecting seat.

[0011] The beneficial effect of the utility model is that when the cutting head completely enters the catheter hole, the guide column will also enter the catheter hole together. The outer wall of the guide column contacts the inner wall of the polished catheter hole, which can limit the deviation of the cutting head during the subsequent polishing process, so as to reduce the dimensional deviation of the processed catheter hole, and specifically improve the effect of the catheter hole processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a multi-edge machining tool for a cylinder head cast iron valve guide according to an embodiment of the present application.

[0013] Figure 2 for Figure 1 A partial enlarged schematic diagram of part A.

[0014] Figure 3 This is a schematic structural diagram from another perspective of a multi-blade machining tool for a cylinder head cast iron valve guide according to an embodiment of the present application.

[0015] Figure 4 This is a schematic cross-sectional view of a guide column of a multi-edge machining tool for a cylinder head cast iron valve guide according to an embodiment of the present application.

[0016] Among them, 1. tool body; 2. connecting seat; 3. guide column; 31. notch; 32. through hole; 33. mounting groove; 4. cutting head; 5. cutting blade; 6. connecting piece; 7. guide head; 8. positioning boss. DETAILED DESCRIPTION

[0017] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] The present application embodiment discloses a multi-edge machining tool for a cylinder head cast iron valve guide, referring to Figure 1 , Figure 2 and Figure 3 , comprising a connection seat 2, a guide column 3 and a cutting head 4, wherein the connection seat 2 is used to connect with the tool body 1, the guide column 3 is integrally fixed on the connection seat 2, and the cutting head 4 is installed at one end of the guide column 3 away from the connection seat 2. A plurality of cutting blades 5 for grinding the catheter hole are bolted to the outer wall of the cutting head 4, and the maximum outer diameter of the guide column 3 is the same as the hole diameter of the cutting blade 5 rotating and grinding.

[0019] In the embodiment of the present application, the staff can drive the tool body 1 to move and rotate with the help of a machine tool or other driving equipment, so that the processing tool can grind the catheter hole of the valve guide. The cutting head 4 needs to move along the axial direction of the valve guide so that the cutting tool can rotate and grind the catheter hole. When the cutting head 4 completely enters the catheter hole, the guide column 3 will also enter the catheter hole together. The outer wall of the guide column 3 contacts the inner wall of the polished catheter hole, which can limit the deviation of the cutting head 4 during the subsequent grinding process to reduce the dimensional deviation of the processed catheter hole. Specifically, the effect of improving the machining accuracy of the catheter hole.

[0020] The cutting knife will generate debris when grinding the catheter hole. In order to prevent the guide column 3 from blocking the catheter hole, a plurality of notches 31 for the grinding debris to pass through are provided on the outer wall of the guide column 3 along its circumference. Figure 4 shown.

[0021] In the embodiment of the present application, the notch 31 is a flat opening, and six notches are provided on the outer wall of the guide column 3. This ensures that the debris can be discharged along the notch 31, and reduces the contact area between the guide column 3 and the inner wall of the catheter hole.

[0022] Furthermore, a mounting groove 33 for inserting the cutting head 4 is provided at one end of the guide column 3 away from the connecting seat 2, and a connecting member 6 is provided between the guide column 3 and the cutting head 4. The connecting member 6 includes a top screw, and a through hole 32 communicating with the mounting groove 33 is provided on the outer wall of the guide column 3 along its own radial direction, and a threaded hole with a size matching the top screw is provided on the outer wall of the cutting head 4. The top screw is passed through the through hole 32 and is threadedly connected with the threaded hole, and the cutting tool is located at the portion of the cutting head 4 that exceeds the guide column 3. The top screw is installed in the through hole 32, so it is not shown in the figure.

[0023] In the embodiment of the present application, the cutting head 4 is inserted into the mounting groove 33 and the threaded hole is aligned with the through hole 32. Then the top screw is inserted into the through hole 32 and threadedly connected to the threaded hole, so that the cutting head 4 and the guide column 3 are firmly connected.

[0024] In order to facilitate the cutting tool to grind the catheter hole, the end of the cutting head 4 away from the guide column 3 is bolted with a guide head 7 for inserting into the catheter hole.

[0025] In order to facilitate the connection base 2 to be plugged into the tool body 1 , a positioning boss 8 is integrally fixed on the connection base 2 .

[0026] The implementation principle of the multi-blade machining tool for cast iron valve guide of a cylinder head in the embodiment of the present application is as follows: during the use of the multi-blade machining tool for cast iron valve guide of a cylinder head, the cutting head 4 needs to move along the axial direction of the valve guide so that the cutting tool can rotate and grind the guide hole. When the cutting head 4 completely enters the guide hole, the guide column 3 will also enter the guide hole together. The outer wall of the guide column 3 contacts the inner wall of the polished guide hole, which can limit the deviation of the cutting head 4 during the subsequent grinding process to reduce the dimensional deviation of the processed guide hole. Specifically, the effect of improving the machining accuracy of the guide hole is improved.

[0027] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A multi-edge machining tool for a cylinder head cast iron valve guide, used to be mounted on a tool body (1), characterized in that: The invention comprises a connecting seat (2), a guide column (3) and a cutting head (4); the connecting seat (2) is used to connect with a tool body (1); the guide column (3) is arranged on the connecting seat (2); the cutting head (4) is arranged at one end of the guide column (3) away from the connecting seat (2); a plurality of cutting blades (5) for grinding the catheter hole are arranged on the outer wall of the cutting head (4); the maximum outer diameter of the guide column (3) is the same as the hole diameter of the hole grinded by the cutting blade (5) when rotating.

2. A multi-edge machining tool for a cylinder head cast iron valve guide according to claim 1, characterized in that: The outer wall of the guide column (3) is provided with a plurality of notches (31) along its circumference for allowing grinding debris to pass through.

3. The multi-edge machining tool for a cylinder head cast iron valve guide according to claim 1, characterized in that: The guide column (3) is provided with a mounting groove (33) for inserting the cutting head (4) at one end away from the connecting seat (2); a connecting piece (6) is provided between the guide column (3) and the cutting head (4); the connecting piece (6) includes a top screw; a through hole (32) connected to the mounting groove (33) is provided on the outer wall of the guide column (3) along its own radial direction; a threaded hole with a size matching the top screw is provided on the outer wall of the cutting head (4); the top screw is inserted into the through hole (32) and is threadedly connected to the threaded hole; the cutting tool is located at the portion of the cutting head (4) that extends beyond the guide column (3).

4. The multi-edge machining tool for a cylinder head cast iron valve guide according to claim 1, characterized in that: The end of the cutting head (4) away from the guide column (3) is provided with a guide head (7) for inserting into the catheter hole.

5. The multi-edge machining tool for cylinder head cast iron valve guide according to claim 1, characterized in that: The connecting seat (2) is provided with a positioning boss (8) for being inserted into the tool body (1).

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