Tool for machining tensioner shell with open U-shaped groove

Abstract

The utility model relates to a tool for machining a tensioner shell with an open U-shaped groove, which comprises a tool bar and a machining end, the machining end is arranged at the lower end of the tool bar and comprises an inner hole forming part and a grooving part, and double-layer steps protruding outwards are arranged at the lower end of the inner hole forming part; a slotting part is arranged at the lower end of the inner hole forming part, and through spiral cutter teeth are evenly distributed on the outer circumference of the inner hole forming part and the outer circumference of the slotting part. According to the utility model, inner hole milling and U-shaped groove milling work can be carried out on the tensioner shell through the machining end, after the grooving part is used for machining an open U-shaped groove, the inner hole of the tensioner shell is machined through the inner hole forming part, and the forming work of two parts is realized through one-time clamping, so that the machining efficiency is greatly improved. And after forming, the inner hole can be corrected again through the inner hole forming part, plastic deformation is eliminated, machined parts completely conform to design drawings, the concentricity can be improved, and the situation that the machining size is affected by circle run-out and the like is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining tools and relates to a tool for machining a tensioner shell with an open U-shaped groove. Background Art

[0002] The tensioner acts on the engine's timing chain, guiding and tightening it to maintain optimal tension. The tensioner's housing houses the entire tensioning mechanism next to the timing chain, maintaining tension through its expansion and contraction. Currently, existing tensioner housings on the market are too flimsy, primarily produced using aluminum die-casting. The tensioning mechanism lacks stability during installation and operation, making it susceptible to damage. Aluminum alloy materials have low hardness and are easily deformed during the operation of the tensioner, causing the tensioning mechanism to fail. Therefore, high-hardness materials are developed to increase wear resistance, and a gray iron casting tensioner housing is developed. Since the processed tensioner housing has an open U-shaped groove and an outer circular groove, multiple clamping operations are required when processing the inner hole, open U-shaped groove, and outer circular groove of the tensioner housing. Different tools are used to process different parts. In addition, due to the thin wall thickness of the parts after processing, plastic deformation is very likely to occur, resulting in a high rate of part size failure, low part batch production efficiency, and high production costs. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art, solve the problem of a high rate of unqualified parts size during the machining of a tensioner housing, and provide a tool for machining a tensioner housing with an open U-shaped groove.

[0004] In order to achieve the above objectives, the following technical solutions are adopted:

[0005] The tool for processing a tensioner housing with an open U-shaped groove includes a tool rod and a processing end. The lower end of the tool rod is provided with a processing end, and the processing end includes an inner hole forming part and a slotting part. The lower end of the inner hole forming part is provided with a double-layer step protruding outward; the lower end of the inner hole forming part is provided with a slotting part, and the outer circumferences of the inner hole forming part and the slotting part are evenly distributed with penetrating spiral cutter teeth.

[0006] Preferably, the number of the through spiral teeth is 3-4.

[0007] Preferably, the shank and the processing end are made in one piece.

[0008] Preferably, the upper and lower ends of the double-layer step are respectively provided with chamfers, and the chamfer angle is 45°.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] The utility model can perform inner hole milling and U-shaped groove milling on the tensioner housing through the processing end. After the open U-shaped groove is processed by the grooving part, the inner hole of the tensioner housing is processed by the inner hole forming part. The forming work of two parts is realized by one clamping. After forming, the inner hole can be corrected again by the inner hole forming part to eliminate plastic deformation, so that the processed parts are completely consistent with the design drawings, the concentricity can be improved, and the situation that affects the processing size, such as circular runout, can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 It is a top view schematic diagram of the present utility model.

[0013] In the figure: 1. Tool bar; 2. Processing end; 3. Inner hole forming part; 4. Grooving part; 5. Double-layer step; 6. Spiral cutter teeth; 7. Chamfer. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0015] like Figure 1-Figure 2 As shown, a tool for machining a tensioner housing with an open U-shaped groove includes a tool bar 1 and a machining end 2. The tool bar 1 is used to be clamped on a machining center, and the machining end 2 is used to machine the tensioner housing.

[0016] The lower end of the tool bar 1 is provided with a processing end 2, and the processing end 2 includes an inner hole forming portion 3 and a slotting portion 4. The inner hole forming portion 3 is used to process the inner hole of the tensioner housing, and the slotting portion 4 is used to process the open U-shaped groove;

[0017] The lower end of the inner hole forming part 3 is provided with a double-layer step 5 protruding outward, and the double-layer step 5 is used to process the step hole inside the tensioner housing; the lower end of the inner hole forming part 3 is provided with a slotted part 4, and the outer circumferences of the inner hole forming part 3 and the slotted part 4 are evenly distributed with penetrating spiral teeth 6. When the processing end 2 rotates, the penetrating spiral teeth 6 rotate to perform milling on the tensioner housing.

[0018] Furthermore, the number of the spiral teeth 6 is 3-4, and the sparse-toothed processing end 2 has higher rigidity and strength, which makes the tool have a longer service life.

[0019] Furthermore, the tool rod 1 and the processing end 2 are made in one piece, which is easy to process and has low cost.

[0020] Furthermore, chamfers 7 are provided at the upper and lower ends of the double-layer step 5, respectively. The angle of the chamfers 7 is 45°. The chamfers 7 facilitate the chamfering of the inner hole of the tensioner housing.

[0021] Working principle: When the present invention is in use, the inner hole and the open U-shaped groove of the tensioner housing can be processed through the processing end 2. The inner hole forming part 3 is used to process the inner hole of the tensioner housing, and the slotting part 4 is used to process the open U-shaped groove; the through spiral cutter teeth 6 located on the outside of the forming part 3 and the slotting part 4 are formed at one time, which is convenient for processing; during processing, the open U-shaped groove can be processed by the slotting part 4, and then the inner hole of the tensioner housing can be processed by the inner hole forming part 3. The two parts can be clamped at one time to achieve the forming work of the two parts, which can improve the concentricity and avoid the situation that the circular runout and other factors affect the processing size.

[0022] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A tool for machining a tensioner housing with an open U-shaped groove, characterized by: The invention comprises a tool rod (1) and a processing end (2), wherein the lower end of the tool rod (1) is provided with the processing end (2), and the processing end (2) comprises an inner hole forming portion (3) and a slotting portion (4), and the lower end of the inner hole forming portion (3) is provided with a double-layer step (5) protruding outward; the lower end of the inner hole forming portion (3) is provided with a slotting portion (4), and the outer circumferences of the inner hole forming portion (3) and the slotting portion (4) are uniformly distributed with penetrating spiral blade teeth (6).

2. A tool for machining a tensioner housing with an open U-shaped groove according to claim 1, characterized in that: The number of the spiral blade teeth (6) is 3-4.

3. The tool for machining a tensioner housing with an open U-shaped groove according to claim 1, characterized in that: The tool rod (1) and the processing end (2) are made in one piece.

4. The tool for machining a tensioner housing with an open U-shaped groove according to claim 1, characterized in that: The upper and lower ends of the double-layer step (5) are respectively provided with chamfers (7), and the angle of the chamfers (7) is 45°.

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