A chamfering and forming tool for intermediate cylinder drawing and piercing

Abstract

This utility model discloses a chamfering forming tool for drawing and turning holes in an intermediate cylinder, comprising: an external chamfering tool matching the required chamfer size of the drawing hole; including a tool holder, a tool head, an external chamfering insert, and a flat end face insert; the external chamfering insert is mounted on a transition piece mounting plate, which can move up and down and be fixed on the concave surface of the first side of the tool head; the position of the transition piece mounting plate can be infinitely adjusted to change the linear distance A from the external chamfering insert to the center of the tool head, thereby controlling the external chamfer size of the drawing hole; the flat end face insert is mounted on the concave surface of the second side of the tool head; and an internal chamfering tool for chamfering the inner surface of the drawing hole and protecting the inner surface of the drawing hole. Thus, through the combination of an adjustable external chamfering tool and a protective internal chamfering tool, the end face milling, external chamfering, and internal chamfering of the intermediate cylinder after drawing and turning holes in the shock absorber can be achieved in one operation, significantly improving efficiency and reducing reliance on specialized milling equipment, realizing integrated processing.

Description

Technical Field

[0001] This utility model relates to the field of chamfering tool technology, and in particular to a chamfering forming tool for drawing and turning holes in an intermediate cylinder. Background Technology

[0002] The intermediate cylinder of a shock absorber is typically made of high-strength steel tubing, cold-rolled or drawn, and then machined with oil channels or mounting holes using a flanging process. Drawing and flanging is a process of locally stretching and punching holes in the tubing to create oil flow holes, ensuring the proper functioning of the shock absorber's damping valve. It also aims to reduce weight or optimize structural strength.

[0003] For intermediate cylinders used in drawing and turning, burrs will form at the turning point during the drawing and turning process (such as...). Figure 1 The diagram shown is a comparison of the deburring process before and after drawing the hole. Therefore, milling and deburring at the hole is an important process. In traditional shock absorber intermediate cylinders, deburring and chamfering after drawing and chamfering require a milling machine to fix the workpiece. The end face and inner and outer chamfers are milled in multiple steps. First, the product is fixed on the milling machine, and then the milling operation is performed at a relatively slow speed using a milling cutter until the flatness and chamfers of the workpiece meet the requirements specified in the drawing.

[0004] However, this traditional processing method has many drawbacks: (1) High cost: It relies on professional milling equipment and skilled operators, the equipment purchase cost is high, and it occupies a large production space; (2) Low efficiency: It requires repeated clamping, the processing process takes a long time, the production efficiency is low, the processing time of a single piece is long, and it is difficult to meet the needs of large-scale production; (3) Accuracy risk: Multiple tool changes can easily lead to cumulative dimensional errors. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a chamfering forming tool for drawing and turning holes in intermediate cylinders.

[0006] This utility model proposes a chamfering forming tool for drawing and turning holes in intermediate cylinders, which is mounted on the tool holder of the processing equipment and includes a chamfering size that matches the required size of the drawing hole:

[0007] An external chamfering tool includes a shank, a cutting head, an external chamfering insert, and a flat-end cutting insert. The external chamfering insert is mounted on a transition mounting plate, which can move up and down and be fixed on the concave surface of the first side of the cutting head. The linear distance A from the external chamfering insert to the center of the cutting head can be changed by steplessly adjusting the position of the transition mounting plate to control the external chamfering size of the drawing hole. The flat-end cutting insert is mounted on the concave surface of the second side of the cutting head.

[0008] An internal chamfering tool is used to chamfer the inner surface of the drawing hole and protect the inner surface of the drawing hole.

[0009] Preferably, the outer side of the tool holder is provided with at least one mounting hole with internal threads, the lower part of the transition mounting plate is inserted into the inside of the tool holder, and the transition mounting plate is pressed and fixed inside the tool holder by bolts passing through the mounting hole.

[0010] Preferably, the outer chamfer size of the drawing hole is C0.1 to C0.4. If the outer chamfer size after the outer chamfering blade does not meet the target requirement of C0.1 to C0.4, the size of the outer chamfer can be adjusted by loosening the bolt and adjusting the installation position of the transition plate on the tool holder.

[0011] Preferably, when the external chamfering tool passes through the flat end face of the flat end face insert, a milling height allowance of 0.1 to 0.2 mm is reserved.

[0012] Preferably, the inner chamfering tool has a cutting head diameter of Φ15.9mm, which is smaller than the inner diameter of the drawing hole.

[0013] Preferably, the outer chamfered blade is a rhomboid structure, and the flat-end blade is an inverted triangular structure.

[0014] In summary, the present invention has the following beneficial effects: (1) The forming tool completes the end face milling and external chamfering simultaneously through the external chamfering tool, and then accurately processes the internal chamfering through the internal chamfering tool, reducing tool change time and improving production efficiency; (2) No special milling machine is required. For example, any processing equipment with a rotatable mounting tool can be used, such as a drilling machine, etc. It can also be integrated into an automated production line, shortening the processing time by more than 50%, thereby reducing equipment maintenance costs, labor costs, etc., and effectively reducing the overall processing cost; (3) The adjustable mounting position of the transition plate enables flexible control of the external chamfer size, adapting to different drawing requirements; (4) No need for multiple tool changes and repeated clamping, automated processing can be achieved, reducing manual intervention, improving the stability and consistency of production, and the single-piece processing time is short, which can meet the needs of large-scale production.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Figure 1 A comparative diagram showing the deburring process before and after deburring the drawing hole;

[0017] Figure 2 The three-dimensional shape of the external chamfering tool in this embodiment of the utility model Figure 1 ;

[0018] Figure 3The three-dimensional shape of the external chamfering tool in this embodiment of the utility model Figure 2 ;

[0019] Figure 4 This is a schematic diagram of the structure of the transition mounting plate according to an embodiment of the present utility model;

[0020] Figure 5 This is a perspective view of the internal chamfering tool according to an embodiment of the present utility model.

[0021] In the picture:

[0022] 1. Pulling hole; 2. External chamfering tool; 21. Tool holder; 211. Mounting hole; 22. Tool head; 221. Transition mounting plate; 23. External chamfering insert; 24. Flat end face insert; 3. Internal chamfering tool. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] like Figure 2-5 As shown, this embodiment proposes a chamfering forming tool for drawing and turning holes in intermediate cylinders, which is mounted on the tool holder of the processing equipment and includes a tool that matches the chamfer size required for the drawing hole 1:

[0025] The external chamfering tool 2 includes a tool holder 21, a tool head 22, an external chamfering blade 23, and a flat end face blade 24. The external chamfering blade 23 is mounted on a transition mounting plate 221, which can move up and down and be fixed on the concave surface of the first side of the tool head 22. The linear distance A from the external chamfering blade 23 to the center of the tool head 22 can be changed by steplessly adjusting the position of the transition mounting plate 221 to control the external chamfering size of the drawing hole 1. The flat end face blade 24 is mounted on the concave surface of the second side of the tool head 22.

[0026] The external chamfering tool 2 is mainly responsible for milling the uneven end face of the drawing hole 1 and performing external chamfering on the drawing hole 1. During the process, the external chamfering insert 23 and the flat end face insert 24 are carried out simultaneously to shorten the processing time.

[0027] The inner chamfering tool 3 is used to chamfer the inner surface of the drawing hole 1 and protect the inner surface of the drawing hole 1.

[0028] Specifically, the diameter of the cutting head 22 of the internal chamfering tool 3 is Φ15.9mm, which is smaller than the inner diameter of the drawing hole 1. This size can effectively protect the inner surface of the drawing hole 1 and prevent it from being scratched by the internal chamfering tool 3 during processing. During processing, the internal chamfering tool 3 adjusts the feed rate through the processing equipment to directly process to the dimensions required by the drawing, thus meeting the internal chamfering size requirements. The operation is simple and the processing accuracy is high.

[0029] In this embodiment, the forming tool is manufactured according to the dimensions required by the customer's drawings to ensure machining accuracy.

[0030] Thus, (1) the forming tool completes the end face milling and external chamfering simultaneously through the external chamfering tool 2, and then precisely processes the internal chamfering through the internal chamfering tool 3, reducing tool change time and improving production efficiency; (2) no special milling machine is required, for example, any processing equipment with rotatable mounting tools can be used, such as a drilling machine, etc., and it can also be integrated into an automated production line, shortening the processing time by more than 50%, thereby reducing equipment maintenance costs, labor costs, etc., and effectively reducing the overall processing cost; (3) the stepless adjustable design of the mounting position of the transition plate 221 enables flexible control of the external chamfer size and adapts to different drawing requirements; (4) no need for multiple tool changes and repeated clamping, automated processing can be achieved, reducing manual intervention, improving the stability and consistency of production, and the single-piece processing time is short, which can meet the needs of large-scale production.

[0031] Furthermore, the outer side of the tool holder 21 is provided with at least one mounting hole 211 with internal threads. The lower part of the transition mounting plate 221 is inserted into the upper part of the tool holder 21, and the transition mounting plate 221 is tightened and fixed inside the tool holder 21 by bolts passing through the mounting hole 211. Specifically, for a stable fixation, this embodiment may provide two mounting holes 211. In this way, the height position of the transition mounting plate 221 can be steplessly adjusted, thereby enabling stepless adjustment of the linear distance A from the outer chamfering blade 23 to the center of the tool head 22, which facilitates control of the outer chamfer size and ensures that the outer chamfer dimensions meet the drawing requirements.

[0032] In this embodiment, the outer chamfer dimension of the drawing hole 1 is C0.1 to C0.4. If the outer chamfer dimension after chamfering by the outer chamfering blade 23 does not meet the target requirement of C0.1 to C0.4, the bolts can be loosened, the bolts can be released from locking the transition plate 221, the installation position of the transition plate 221 in the tool holder 21 can be adjusted up and down, and then the bolts can be tightened to press the transition plate 221 against the tool holder 21. By moving the transition plate 221 up and down, the straight-line distance A from the outer chamfering blade 23 to the center of the tool head 22 can be changed, thereby adjusting the size of the outer chamfer. This can meet different processing size requirements.

[0033] The height of the end face of the drawing hole 1 is determined by adjusting the feed rate of the outer chamfering insert 23 using the machining equipment to meet the dimensional requirements. When milling the end face, a milling height allowance of 0.1-0.2mm is reserved for subsequent inner chamfering.

[0034] Preferably, the outer chamfering blade 23 is a rhomboid structure, and the flat end face blade 24 is an inverted triangular structure. The shape and size of the outer chamfering blade 23 and the flat end face blade 24 are designed according to the outer contour of the drawing hole 1 and the processing requirements, depending on the specific circumstances.

[0035] It should be noted that the forming tool in this embodiment is a combination of an adjustable external chamfering tool 2 and a protective internal chamfering tool 3. Through the coordinated design of the external chamfering tool 2 and the internal chamfering tool 3, the end face milling, external chamfering and internal chamfering after the shock absorber intermediate cylinder is pulled and turned can be completed in one go, which significantly improves efficiency and reduces the dependence on professional milling equipment, thus achieving integrated processing.

[0036] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A chamfer forming tool for intermediate cylinder drawing and piercing, which is mounted on a tool holder of a processing apparatus, characterized in that, Including those matching the chamfer dimensions required for the drawing hole: An external chamfering tool includes a shank, a cutting head, an external chamfering insert, and a flat-end cutting insert. The external chamfering insert is mounted on a transition mounting plate, which can move up and down and be fixed on the concave surface of the first side of the cutting head. The linear distance A from the external chamfering insert to the center of the cutting head can be changed by steplessly adjusting the position of the transition mounting plate to control the external chamfering size of the drawing hole. The flat-end cutting insert is mounted on the concave surface of the second side of the cutting head. An internal chamfering tool is used to chamfer the inner surface of the drawing hole and protect the inner surface of the drawing hole.

2. The chamfer forming tool for intermediate cylinder drawing and piercing according to claim 1, characterized in that, The outer side of the tool holder is provided with at least one mounting hole with internal threads. The lower part of the transition mounting plate is inserted into the inside of the tool holder, and the transition mounting plate is pressed and fixed inside the tool holder by bolts passing through the mounting hole.

3. The chamfer forming tool for intermediate cylinder drawing and piercing according to claim 2, characterized in that, The outer chamfer size of the drawing hole is C0.1 to C0.

4. If the outer chamfer size after the outer chamfering blade does not meet the target requirement of C0.1 to C0.4, the size of the outer chamfer can be adjusted by loosening the bolt and adjusting the installation position of the transition plate on the tool holder.

4. The chamfer forming tool for intermediate cylinder drawing and piercing according to claim 1, characterized in that, When the external chamfering tool passes through the flat end face of the flat end face insert, a milling height allowance of 0.1 to 0.2 mm is reserved.

5. The chamfer forming tool for intermediate cylinder drawing and piercing according to claim 1, characterized in that, The inner chamfering tool has a cutting head diameter of Φ15.9mm, which is smaller than the inner diameter of the drawing hole.

6. The chamfer forming tool for intermediate cylinder drawing and piercing according to claim 1, characterized in that, The outer chamfered blade is designed with a rhomboid structure, and the flat end face blade is designed with an inverted triangular structure.

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