Finish machining cutter for internal annular step

Abstract

The utility model discloses an internal annular step finish machining cutter which comprises a rotating base, a connecting shaft is arranged above the rotating base, two machining blades are arranged on the connecting shaft, a gasket is arranged between the two machining blades, a lifting device is arranged in the gasket, a fixing disc is arranged on the uppermost machining blade, and a lifting device is arranged on the fixing disc. And a fastening nut is arranged above the fixed disc. The two machining blades are arranged, the gasket is arranged between the two machining blades to control the distance between the two machining blades, and it can be guaranteed that the gap between the two machining blades is fixed. And after being assembled, the cutter enters the inner cavity of the workpiece by a specified depth, advances around the milling machine for machining, and then retreats from the workpiece, so that the workpiece is machined. Due to the fact that the thickness tolerance of the step is small, the actual thickness of the step can be affected by uncertain factors such as tool rigidity, machine tool spindle jumping and cutter jumping in the actual machining process. Therefore, the thickness of the gasket 1 ranges from 2.98 to 3.00, and one specification per 0.005.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, specifically to a precision machining tool for internal annular steps. Background Technology

[0002] Machining refers to the process of changing the shape, size, or properties of a workpiece using mechanical equipment. Based on the method of machining, it can be divided into cutting machining and pressure machining.

[0003] During the machining of a certain type of workpiece, it was discovered that the thickness of the raised annular step within the workpiece's inner cavity was 2.98-3.00 mm, with an extremely small tolerance range, making it the most difficult dimension to machine. Using traditional insert-equipped cutting tools, the upper and lower step surfaces are machined separately. Although the thickness can be controlled by adjusting machine tool parameters, in mass production, considering tool wear, frequent dimensional adjustments and measurements may be necessary, significantly increasing the workload. Therefore, the cutting tools used for machining this type of workpiece need to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a finishing tool for internal annular steps to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rotating base is included, a connecting shaft is provided above the rotating base, two processing blades are provided on the connecting shaft, a shim is provided between the two processing blades, a lifting device is provided inside the shim, a fixing plate is provided above the uppermost processing blade, and a fastening nut is provided above the fixing plate.

[0006] Preferably, the uppermost part of the connecting shaft is provided with a thread, which is adapted to the fastening nut.

[0007] Preferably, the lifting device includes multiple lifting bars, and the connecting shaft has multiple lifting grooves, with the lifting bars being adapted to the lifting grooves.

[0008] Preferably, the lifting bar is L-shaped, the upper end of the lifting bar is threaded, the thread matches the thread on the connecting shaft, and the bottom of the lifting bar is provided with a flat plate, which is inserted below the gasket.

[0009] Preferably, the lower surface of the gasket is provided with a plurality of lifting grooves, which are adapted to the plate.

[0010] Preferably, the thickness of the gasket ranges from 2.98 to 3.00, with each change of 0.005 representing a different specification, specifically 2.980 / 2.985 / 2.990 / 2.995 / 3.000.

[0011] Compared with the prior art, the beneficial effects of this utility model are: by setting two machining blades and placing a shim between them to control the distance between the two machining blades, the gap between the two machining blades can be kept constant. After the tool is assembled, it enters the workpiece cavity to the specified depth, performs milling, and then exits the workpiece, thus completing the machining. Given the small tolerance of the step thickness, uncertainties such as tooling rigidity, machine tool spindle runout, and tool runout will affect the actual thickness of the step during actual machining. Therefore, the thickness of washer 1 is specified in increments of 0.005, from 2.98 to 3.00, namely: 2.980 / 2.985 / 2.990 / 2.995 / 3.000. Five thickness specifications of washers were pre-ordered for adjustment and replacement according to the actual machining dimensions of the workpiece. When the washer needs to be replaced, the nut is removed, and then the lifting bar is pulled out, allowing the washer and the machining blade above to be removed simultaneously, improving replacement efficiency and saving time and effort. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a side view of the structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0015] Figure 4 This is a schematic diagram of the lifting bar structure of this utility model.

[0016] In the diagram: 1. Rotating base; 2. Connecting shaft; 3. Machining blade; 4. Shim; 5. Lifting device; 6. Fixed plate; 7. Fastening nut; 8. Lifting bar; 9. Flat plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-4 The embodiments provided by this utility model are as follows:

[0019] Example: Includes a rotating base 1, characterized in that: a connecting shaft 2 is provided above the rotating base 1, two machining blades 3 are provided on the connecting shaft 2, and a shim 4 is provided between the two machining blades 3. The shim 4 can limit the interval between the two machining blades 3, thereby regulating the machining accuracy. A lifting device 5 is provided inside the shim 4, a fixing plate 6 is provided above the uppermost machining blade 3, and a fastening nut 7 is provided above the fixing plate 6. The fastening nut 7 can fix the machining blade 3 by pressing the fixing plate 6, facilitating the machining of the machining blade 3.

[0020] The uppermost part of the connecting shaft 2 is provided with a thread, which is adapted to the fastening nut 7.

[0021] The lifting device 5 includes multiple lifting bars 8, and the connecting shaft 2 has multiple lifting grooves, with the lifting bars 8 being adapted to the lifting grooves.

[0022] The lifting bar 8 is L-shaped, with a threaded upper end that matches the thread on the connecting shaft 2. The bottom of the lifting bar 8 has a flat plate 9 that inserts below the gasket 4. The L-shaped lifting bar 8 can lift the gasket 4 upwards, facilitating gasket 4 replacement.

[0023] The lower surface of the gasket 4 is provided with multiple lifting grooves, which are adapted to the plate 9.

[0024] The thickness of the gasket 4 ranges from 2.98 to 3.00, with each change of 0.005 representing a different specification, specifically 2.980 / 2.985 / 2.990 / 2.995 / 3.000.

[0025] By setting two machining inserts 3 and placing a shim 4 between them to control the distance between the two inserts 3, the gap between the two inserts 3 can be kept constant. After the tool is assembled, it enters the workpiece cavity to the specified depth, performs milling, and then exits the workpiece, thus completing the machining. Given the small tolerance for the step thickness, uncertainties such as tooling rigidity, machine spindle runout, and tool runout can affect the actual thickness of the step during actual machining. Therefore, the thickness of the washer 1 is specified in increments of 0.005, ranging from 2.98 to 3.00 mm: 2.980 / 2.985 / 2.990 / 2.995 / 3.000 mm. Five thickness specifications of washers were pre-ordered for adjustment and replacement according to the actual machining dimensions of the workpiece. When the washer needs to be replaced, the nut is removed, and then the lifting bar 8 is pulled out, allowing the washer and the upper machining insert 3 to be removed simultaneously, improving replacement efficiency and saving time and effort.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A finishing tool for internal annular steps, comprising a rotating base (1), characterized in that: A connecting shaft (2) is provided above the rotating base (1), and two processing blades (3) are provided on the connecting shaft (2). A shim (4) is provided between the two processing blades (3). A lifting device (5) is provided inside the shim (4). A fixing plate (6) is provided above the uppermost processing blade (3), and a fastening nut (7) is provided above the fixing plate (6).

2. The finishing tool for an internal annular step according to claim 1, characterized in that: The uppermost part of the connecting shaft (2) is provided with a thread, which is adapted to the fastening nut (7).

3. The finishing tool for an internal annular step according to claim 1, characterized in that: The lifting device (5) includes multiple lifting bars (8), and multiple lifting grooves are provided on the connecting shaft (2). The lifting bars (8) are adapted to the lifting grooves.

4. The finishing tool for an internal annular step according to claim 3, characterized in that: The lifting bar (8) is L-shaped, and the upper end of the lifting bar (8) is threaded, which matches the thread on the connecting shaft (2). The bottom of the lifting bar (8) is provided with a flat plate (9), which is inserted below the gasket (4).

5. The finishing tool for an internal annular step according to claim 4, characterized in that: The lower surface of the gasket (4) is provided with a plurality of lifting grooves, which are adapted to the plate (9).

6. The finishing tool for an internal annular step according to claim 1, characterized in that: The thickness of the gasket (4) ranges from 2.98 to 3.00, with each change of 0.005 representing a different specification, specifically 2.980 / 2.985 / 2.990 / 2.995 / 3.000.

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