Milling cutter with replaceable cutter head

Abstract

The utility model relates to the technical field of milling cutters, in particular to a milling cutter with a replaceable cutter bit, which comprises a shell, a connector mounted on the inner wall of the shell and the cutter bit mounted on the side wall of the connector, the cutter bit is in threaded connection with the side wall of the connector, and the connector is in interference fit with the shell. The cutter has the advantages that only the cutter head is replaced in the cutter replacement process, and waste of cutter handle materials is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of milling cutters, and in particular to a milling cutter with a replaceable cutter head. Background Art

[0002] In industrial production, a variety of cutting tools are needed to process workpieces. The cutter head will wear during use. As the use time increases, the wear will become more and more serious. When the degree of tool wear causes the processing efficiency and accuracy to fail to meet the processing requirements, new tools will be replaced to ensure processing efficiency and accuracy.

[0003] Existing tools typically consist of a shank fixed to the side of a machine tool and a cutting head fixed to the end of the shank. The cutting head is coaxially fixed to the end of the shank and is equipped with a cutting edge for cutting the workpiece. Most common tools have a shank and cutting head integrated into the tool. Changing the tool requires replacing both the shank and cutting head simultaneously, and each tool change requires recalibration of the new tool's position.

[0004] The above tool replacement process requires replacing the tool handle and the tool head at the same time, which causes material waste in the tool handle part and there is room for improvement. Utility Model Content

[0005] In order to replace only the cutter head during tool replacement and reduce the waste of tool handle material, the present application provides a milling cutter with a replaceable cutter head.

[0006] This application provides a milling cutter with a replaceable cutter head, which adopts the following technical solution:

[0007] A milling cutter with a replaceable cutter head comprises a housing, a connector mounted on the inner wall of the housing and a cutter head mounted on the side wall of the connector. The connector is interference fit with the housing, and the cutter head is detachably connected to the side wall of the connector.

[0008] By adopting the above technical solution, when installing the milling cutter, the connector and the shell are interference fit, and the side wall of the connector abuts against the inner wall of the shell. At this time, the cutter head is fixed to the side wall of the connector. When replacing the tool, the cutter head is removed from the connector and a new cutter head is installed. During the tool replacement process, only the cutter head is replaced, reducing the waste of tool handle material.

[0009] Optionally, a support column is fixed to the side wall of the connector, the support column and the connector are integrally provided, a trapezoidal thread is provided on the side wall of the support column, and the cutter head is threadedly fixed to the side wall of the support column.

[0010] By adopting the above technical solution, the support column and the connector are integrated, the cutter head is fixed to the side wall of the support column, and the inner wall of the cutter head abuts against the side wall of the support column, which increases the stability of the cutter head during operation and reduces the looseness of the support column during operation.

[0011] Optionally, the pitch of the trapezoidal thread is 2.2-3.0 mm.

[0012] By adopting the above technical solution, the pitch accuracy of the trapezoidal thread directly affects the transmission accuracy, and the pitch range of 2.2-3.0mm can meet the transmission requirements of higher precision.

[0013] Optionally, a positioning column is fixed to one end of the support column away from the connecting body, and the inner wall of the cutter head abuts against the side wall of the positioning column.

[0014] By adopting the above technical solution, when the cutter head is installed, the inner wall of the cutter head abuts against the side wall of the positioning column, which makes it easier to control the axis accuracy of the cutter head.

[0015] Optionally, a positioning surface is formed on the side wall of the connector, the support column is located on the positioning surface, and the side wall of the cutter head abuts against the positioning surface.

[0016] By adopting the above technical solution, the abutment between the cutter head and the positioning surface improves the accuracy of the axial positioning of the cutter head.

[0017] Optionally, a machine tool clamping portion is fixed to a side of the shell away from the support column, and a clamping hole for clamping a side wall of the machine tool is opened on the inner wall of the machine tool clamping portion.

[0018] By adopting the above technical solution, when installing the milling cutter, the shell body is clamped on the power shaft of the machine tool through the clamping hole, thereby increasing the stability of the milling cutter during operation.

[0019] Optionally, a reference surface is provided on a side of the shell close to the machine tool clamping portion, and a tolerance range of the distance between the reference surface and the positioning surface is 0.01-0.02 mm.

[0020] By adopting the above technical solution, the tolerance range is controlled within 0.01-0.02mm, ensuring the precise alignment between the housing and the machine tool clamping part, improving the positioning accuracy during the processing, and being suitable for high-precision processing requirements.

[0021] Optionally, the connector and the positioning column are coaxially arranged, and the axis tolerance range of the connector and the machine tool clamping part is 0.02-0.03 mm.

[0022] By adopting the above technical solution, when the milling cutter is working, the precise control of the axis tolerance range helps to reduce the eccentricity error during the processing, ensures the rotational symmetry of the milling cutter during the processing, and thus improves the processing accuracy.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Before the milling cutter works, the connector and the housing are interference fit, and the cutter head is fixed to the side wall of the connector through threads. When the cutter head needs to be maintained or replaced, the cutter head is removed from the connector and replaced with a new one. During the tool replacement process, only the cutter head is replaced, which reduces the waste of tool holder material.

[0025] 2. When installing the cutter head, the side wall of the cutter head abuts the positioning surface, and the inner wall of the cutter head abuts the outer wall of the positioning column, which respectively ensures the axial positioning accuracy and axis accuracy of the cutter head. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a side view of a milling cutter with a replaceable cutter head in an embodiment of the present application.

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0028] Figure numerals: 1. housing; 2. connector; 3. cutter head; 4. support column; 5. trapezoidal thread; 6. positioning column; 7. positioning surface; 8. machine tool clamping part; 9. clamping hole; 10. reference surface. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-2 This application is described in further detail.

[0030] An embodiment of the present application discloses a milling cutter with a replaceable cutter head.

[0031] Reference Figure 1 and Figure 2 A milling cutter with a replaceable cutter head 3 includes a housing 1, a machine tool clamping part 8 and a cutter head 3 fixed to the side wall of the housing 1. A clamping hole 9 for clamping the machine tool power shaft is opened in the machine tool clamping part 8. When installing the milling cutter, the power shaft of the machine tool is clamped in the clamping hole 9, the machine tool clamps the machine tool clamping part 8, and the side wall of the housing 1 abuts against the side wall of the machine tool to fix the cutter head 3 to the side wall of the housing 1. Under the action of the machine tool clamping part 8, the fixation between the milling cutter and the machine tool is more stable.

[0032] A connector 2 is installed on the shell 1, and the outer wall of the connector 2 abuts the inner wall of the shell 1. When the connector 2 is installed, the shell 1 is heated at high temperature and expands. At this time, the connector 2 is installed. After the shell 1 shrinks, the connector 2 and the shell 1 have an interference fit, which increases the stability of the connector 2 fixed in the shell 1, improves the accuracy of the milling cutter, and increases the durability of the milling cutter.

[0033] A support column 4 is fixed on the side wall of the connecting body 2, and the support column 4 is integrally arranged with the connecting body 2. A positioning column 6 is fixed to the end of the support column 4 away from the shell 1, and the cutter head 3 is threadedly fixed to the side wall of the support column 4. The inner wall of the cutter head 3 abuts the side wall of the positioning column 6, which is convenient for controlling the axial center accuracy of the cutter head 3. A positioning surface 7 is provided on the side of the connecting body 2 close to the support column 4, and the side wall of the cutter head 3 abuts the positioning surface 7 of the connecting body 2, ensuring the axial positioning accuracy of the cutter head 3.

[0034] A datum surface 10 is defined on the side of the housing 1 near the machine tool clamping portion 8. The distance between datum surface 10 and positioning surface 7 has a tolerance range of 0.01-0.02mm, ensuring precise alignment between the tool and the machine tool, reducing machining errors caused by length tolerances, and improving the machining accuracy of the milling cutter. The connector 2 and the positioning column are coaxial, and the axis tolerance between the connector 2 and the machine tool clamping portion 8 is 0.02-0.03mm, reducing eccentricity during machining, ensuring rotational symmetry of the milling cutter, and improving machining accuracy.

[0035] Reference Figure 2 A trapezoidal thread 5 is provided on the side wall of the support column 4. The trapezoidal thread 5 provides good transmission efficiency and positioning accuracy. The pitch range of the trapezoidal thread 5 is 2.2-3.0 mm. When actually processing the trapezoidal thread 5, the pitches of the trapezoidal thread 5 are 2.2 mm, 2.7 mm, and 3 mm, respectively. The three pitches correspond to three types of milling cutters, which increases the application field of the milling cutter.

[0036] The implementation principle of a milling cutter with a replaceable cutter head 3 in an embodiment of the present application is as follows: before the milling cutter works, the shell 1 is heated and the connector 2 is fixed to the inner wall of the shell 1. After the shell 1 cools down, the connector 2 is interference fit with the shell 1, and the cutter head 3 is threadedly fixed to the side wall of the support column 4. The side wall of the cutter head 3 abuts the positioning surface 7, and the inner wall of the cutter head 3 abuts the positioning column 6. When replacing the cutter head 3, the cutter head 3 is removed through the trapezoidal thread 5. In this process, only the cutter head 3 is replaced during the tool replacement process, reducing the waste of tool handle material.

[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A milling cutter with a replaceable cutter head, characterized in that: It comprises a housing (1), a connector (2) mounted on the inner wall of the housing (1), and a cutter head (3) mounted on the side wall of the connector (2), wherein the connector (2) and the housing (1) are interference-fitted, and the cutter head (3) is detachably connected to the side wall of the connector (2); The side wall of the connector (2) is provided with a positioning surface (7), the side wall of the connector (2) is fixed with a support column (4), the support column (4) is located on the positioning surface (7), and the side wall of the cutter head (3) abuts against the positioning surface (7); A machine tool clamping portion (8) is fixed to a side of the housing (1) away from the support column (4), and a clamping hole (9) for clamping a machine tool side wall is provided on the inner wall of the machine tool clamping portion (8); A reference surface (10) is provided on a side of the housing (1) away from the cutter head (3), and a distance tolerance between the reference surface (10) and the positioning surface (7) is 0.01-0.02 mm; The axis tolerance range of the connecting body (2) and the machine tool clamping part (8) is 0.02-0.03 mm.

2. A milling cutter with a replaceable cutter head according to claim 1, characterized in that: The support column (4) and the connecting body (2) are integrally arranged, a trapezoidal thread (5) is provided on the side wall of the support column (4), and the cutter head (3) is threadedly fixed to the side wall of the support column (4).

3. A milling cutter with a replaceable cutter head according to claim 2, characterized in that: The pitch of the trapezoidal thread (5) is 2.2-3.0 mm.

4. The milling cutter with a replaceable cutter head according to claim 3, characterized in that: A positioning column (6) is fixed to one end of the support column (4) away from the connector (2); the connector (2) and the positioning column (6) are coaxially arranged; the inner wall of the cutter head (3) abuts against the side wall of the positioning column (6).

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