Backwashing face forming cutter

Abstract

The utility model discloses a backwashing surface forming cutter, which belongs to the field of processing tools and comprises a spindle connecting portion and a backwashing cutter holder, a cutter bit seat is mounted on the backwashing cutter holder, a dynamic balance portion is connected onto the backwashing cutter holder, and the dynamic balance portion and the backwashing cutter holder form a dynamic balance cutter holder. The gravity center of the dynamic balance tool apron is located on the axis of the main shaft connecting part, and the dynamic balance part is additionally arranged and used for balancing the eccentricity of the backwashing tool apron, so that in the rotating process of the main shaft, the overall dynamic balance is achieved, the rotating speed is easy to increase, and the dangerous situation that the tool apron flies out is not prone to occurring. And when a back washing face is machined, a cutter rotates eccentrically, so that the speed of a main shaft is difficult to increase, and potential safety hazards exist.

Description

Technical Field

[0001] The utility model relates to a processing tool, in particular to a reverse-facing surface forming tool. Background Art

[0002] For some products, the flat surface needs to be processed from the back. In order to pass through the opening on the product, the tool needs to be eccentrically arranged relative to the main shaft, resulting in unstable dynamic balance of the tool, which will generate an additional radial load on the main shaft. Due to the action of centrifugal force, the tapered hole at the joint of the main shaft and the tool will produce an expansion effect, which will not only affect the connection stiffness between the tool and the main shaft, but also make the main shaft speed difficult to increase, resulting in inefficient processing. In severe cases, it will fly out and cause injury.

[0003] For example, the "eccentric reverse milling cutter" disclosed in the Chinese patent document with the publication number CN215392711U includes a first tool shank, a second tool shank and a milling cutter body connected in sequence. The second tool shank is connected to the middle of the first tool shank, and one end of the milling cutter body is connected to the second tool shank; the first tool shank and the second tool shank are on the same straight line, and the milling cutter body is arranged along the radial direction of the second tool shank; a milling cutter seat is arranged on the milling cutter body, a milling cutter blade is arranged on the milling cutter seat, and the milling cutter blade faces the direction of the first tool shank. The disadvantage of this patent is that the tool seat is eccentrically arranged relative to the rotating shaft, which will make it difficult to increase the main shaft speed during the processing and there are potential safety hazards. Summary of the Utility Model

[0004] The utility model aims to overcome the problems in the prior art that when performing reverse-facing surface processing, the tool rotates eccentrically, resulting in difficulty in increasing the main shaft speed and potential safety hazards, and provides a reverse-facing surface forming tool, which can avoid the problems of low efficiency and potential safety hazards caused by eccentric rotation of the tool during back processing.

[0005] In order to achieve the above object, the utility model adopts the following technical solutions:

[0006] The utility model provides a reverse-facing surface forming tool, which includes a main shaft connection part and a reverse wash tool seat. A tool head seat is installed on the reverse wash tool seat, and a dynamic balance part is connected to the reverse wash tool seat. The dynamic balance part and the reverse wash tool seat form a dynamic balance tool seat, and the center of gravity of the dynamic balance tool seat is located on the axis of the main shaft connection part.

[0007] When performing back processing of the product, since it is necessary to pass through the opening of the product, the overall width of the reverse wash tool seat and the tool head needs to be smaller than the inner diameter of the opening. If the tool head is to process the back of the product, the reverse wash tool seat needs to be eccentrically arranged relative to the main shaft. In this application, by adding a dynamic balance part to balance the eccentricity of the reverse wash tool seat, the overall dynamic balance is achieved during the rotation of the main shaft, the speed is easy to increase, and the dangerous situation of the tool seat flying out is not likely to occur.

[0008] Preferably, the tool head seat is installed on the side of the backwashing tool seat that is farther from the axis of the spindle connection part.

[0009] Preferably, a tool head is installed on the tool head seat, and the tool head is installed on the side of the tool head seat close to the spindle connection part.

[0010] Preferably, the backwashing tool seat is eccentrically arranged relative to the spindle connection part.

[0011] Preferably, the axis of the backwashing tool seat and the axis of the dynamic balance part are centrosymmetric about the axis of the spindle connection part. Through the centrosymmetric structure, when the spindle rotates, the overall structure installed on the spindle maintains dynamic balance.

[0012] Preferably, the dynamic balance part is installed between the spindle connection part and the backwashing tool seat.

[0013] Preferably, the dynamic balance part is installed on the side surface of the backwashing tool seat.

[0014] Preferably, the dynamic balance part is rotatably connected to the backwashing tool seat.

[0015] Preferably, a torsion spring is installed at the connection between the dynamic balance part and the backwashing tool seat.

[0016] Therefore, the utility model has the following beneficial effects: the overall tool seat maintains dynamic balance when the spindle rotates, thereby avoiding the problems of low efficiency and potential safety hazards caused by eccentric rotation of the tool during back processing. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of Embodiment 1 of the utility model.

[0018] Figure 2 is a schematic structural diagram of Embodiment 2 of the utility model.

[0019] Figure 3 is a schematic structural diagram of Embodiment 3 of the utility model.

[0020] Figure 4 is a schematic structural diagram of Embodiment 4 of the utility model.

[0021] In the figure: spindle connection part 1, backwashing tool seat 2, tool head seat 3, tool head 4, dynamic balance part 5, part to be processed 6. Detailed Embodiments

[0022] The following further describes the utility model in conjunction with the drawings and specific embodiments.

[0023] Embodiment 1, as Figure 1As shown in the figure, a reverse-facing surface forming tool includes a spindle connection part 1 and a reverse-washing tool holder 2. The spindle connection part 1 is directly coaxially connected to the spindle. A tool head holder 3 is installed on the reverse-washing tool holder 2, and the tool head holder 3 is installed on the side of the reverse-washing tool holder 2 that is farther from the axis of the spindle connection part 1. A tool head 4 is installed on the tool head holder 3, and the tool head 4 is installed on the side of the tool head holder 3 that is close to the spindle connection part 1. A dynamic balance part 5 is connected to the reverse-washing tool holder 2. The dynamic balance part 5 and the reverse-washing tool holder 2 form a dynamic balance tool holder, and the center of gravity of the dynamic balance tool holder is located on the axis of the spindle connection part 1.

[0024] In this embodiment, the reverse-washing tool holder 2 is eccentrically arranged relative to the spindle connection part 1. The axis of the reverse-washing tool holder 2 and the axis of the dynamic balance part 5 are centrosymmetric with respect to the axis of the spindle connection part 1 with the axis of the spindle connection part 1 as the axis. The dynamic balance part 5 is installed between the spindle connection part 1 and the reverse-washing tool holder 2. The overall width of the reverse-washing tool holder 2, the tool head holder 3, and the tool head 4 is smaller than the inner diameter of the opening of the workpiece 6 to be machined, so that the reverse-washing tool holder 2 can pass through the workpiece 6 to be machined to machine its back surface. The length of the reverse-washing tool holder 2 is greater than the length of the opening of the workpiece 6 to be machined, so that there is a certain distance between the workpiece 6 to be machined and the dynamic balance part 5.

[0025] When the tool is in use, align the axis of the reverse-washing tool holder 2 with the center of the opening of the workpiece 6 to be machined, and make the reverse-washing tool holder 2 pass through the opening of the workpiece 6 to be machined. After passing through the opening, make the reverse-washing tool holder 2 move radially relative to the workpiece 6 to be machined, so that the tool head 4 is aligned with the surface to be machined of the workpiece 6. After the radial movement, the axis of the reverse-washing tool holder 2 is offset from the axis of the workpiece 6 to be machined, so that the axis of the workpiece 6 to be machined coincides with the axis of the spindle. During the rotation of the spindle, although the reverse-washing tool holder 2 is eccentrically arranged relative to the spindle, the dynamic balance part 5 is also eccentrically arranged relative to the spindle. The center of gravity of the overall dynamic balance tool holder formed by the two is located on the spindle axis, thus forming dynamic balance, so that during the rotation of the spindle, the rotational speed can be increased to a relatively large value, improving the machining efficiency, and preventing the situation that the tool head 4 flies out.

[0026] Embodiment 2, as Figure 2 As shown in the figure, a reverse-facing surface forming tool includes a spindle connection part 1 and a reverse-washing tool holder 2. The spindle connection part 1 is directly coaxially connected to the spindle. A tool head holder 3 is installed on the reverse-washing tool holder 2, and the tool head holder 3 is installed on the side of the reverse-washing tool holder 2 that is farther from the axis of the spindle connection part 1. A tool head 4 is installed on the tool head holder 3, and the tool head 4 is installed on the side of the tool head holder 3 that is close to the spindle connection part 1. A dynamic balance part 5 is connected to the reverse-washing tool holder 2. The dynamic balance part 5 and the reverse-washing tool holder 2 form a dynamic balance tool holder, and the center of gravity of the dynamic balance tool holder is located on the axis of the spindle connection part 1.

[0027] In this embodiment, the backwashing tool holder 2 is eccentrically arranged relative to the spindle connecting portion 1. The dynamic balancing portion 5 is installed on the side surface of the backwashing tool holder 2 and is detachably installed. Specifically, an external threaded rod is provided at the end of the dynamic balancing portion 5, and an internal threaded hole is provided on the side surface of the backwashing tool holder 2. The dynamic balancing portion 5 is installed on the backwashing tool holder 2 through threaded cooperation. The overall width of the backwashing tool holder 2, the tool head holder 3, and the tool head 4 is smaller than the inner diameter of the opening of the workpiece 6 to be machined, so that the backwashing tool holder 2 can pass through the workpiece 6 to be machined to machine its back surface. The distance between the dynamic balancing portion 5 and the tool head 4 is greater than the length of the opening of the workpiece 6 to be machined, so that there is a certain distance between the workpiece 6 to be machined and the dynamic balancing portion 5.

[0028] When the tool is in use, align the axis of the backwashing tool holder 2 with the center of the opening of the workpiece 6 to be machined, and make the backwashing tool holder 2 pass through the opening of the workpiece 6 to be machined. After passing through the opening, make the backwashing tool holder 2 perform a radial relative movement with the workpiece 6 to be machined, so that the tool head 4 is aligned with the surface to be machined of the workpiece 6. After the radial movement, the axis of the backwashing tool holder 2 is offset from the axis of the workpiece 6 to be machined, so that the axis of the workpiece 6 to be machined coincides with the axis of the spindle. During the rotation of the spindle, although the backwashing tool holder 2 is eccentrically arranged relative to the spindle, the dynamic balancing portion 5 is also eccentrically arranged relative to the spindle. The center of gravity of the overall dynamic balancing tool holder formed by the two is located on the axis of the spindle, thus forming dynamic balance, so that during the rotation of the spindle, the rotational speed can be increased to a relatively large value, improving the machining efficiency, and preventing the situation of the tool head 4 flying out.

[0029] Embodiment 3, as Figure 3 shown, a backwashing surface forming tool includes a spindle connecting portion 1 and a backwashing tool holder 2. The spindle connecting portion 1 is directly coaxially connected to the spindle. A tool head holder 3 is installed on the backwashing tool holder 2, and the tool head holder 3 is installed on the side of the backwashing tool holder 2 farther from the axis of the spindle connecting portion 1. A tool head 4 is installed on the tool head holder 3, and the tool head 4 is installed on the side of the tool head holder 3 close to the spindle connecting portion 1. A dynamic balancing portion 5 is connected to the backwashing tool holder 2. The dynamic balancing portion 5 and the backwashing tool holder 2 form a dynamic balancing tool holder, and the center of gravity of the dynamic balancing tool holder is located on the axis of the spindle connecting portion 1.

[0030] In this embodiment, the backwashing tool holder 2 is eccentrically arranged relative to the spindle connecting portion 1. The dynamic balancing portion 5 is installed on the side surface of the backwashing tool holder 2 and is detachably installed. Specifically, an external threaded rod is provided at the end of the dynamic balancing portion 5, and an internal threaded hole is provided on the side surface of the backwashing tool holder 2. The dynamic balancing portion 5 is installed on the backwashing tool holder 2 through threaded cooperation. The overall width of the backwashing tool holder 2, the tool head holder 3, and the tool head 4 is smaller than the inner diameter of the opening of the workpiece 6 to be machined, so that the backwashing tool holder 2 can pass through the workpiece 6 to be machined to machine its back surface. The dynamic balancing portion 5 is installed on the backwashing tool holder 2, on the side opposite to the tool head holder 3.

[0031] When using the tool, first remove the dynamic balance part 5 from the backwashing tool holder 2, then align the axis of the backwashing tool holder 2 with the center of the opening of the workpiece 6 to be machined, and pass the backwashing tool holder 2 through the opening of the workpiece 6 to be machined. After passing through the opening, make the backwashing tool holder 2 move radially relative to the workpiece 6 to be machined, so that the tool tip 4 is aligned with the surface to be machined of the workpiece 6 to be machined. After the radial movement, the axis of the backwashing tool holder 2 is offset from the axis of the workpiece 6 to be machined, so that the axis of the workpiece 6 to be machined coincides with the axis of the main shaft. After the movement is completed, install the dynamic balance part 5 on the backwashing tool holder 2. During the rotation of the main shaft, although the backwashing tool holder 2 is eccentrically arranged relative to the main shaft, the dynamic balance part 5 is also eccentrically arranged relative to the main shaft. The center of gravity of the overall dynamic balance tool holder formed by the two is located on the axis of the main shaft, thus forming dynamic balance, enabling the rotational speed to be increased to a relatively large value during the rotation of the main shaft, improving the machining efficiency, and preventing the situation of the tool tip 4 flying out.

[0032] Example 4, as Figure 4 shown, a backwashing surface forming tool includes a main shaft connecting part 1 and a backwashing tool holder 2. The main shaft connecting part 1 is directly coaxially connected to the main shaft. A tool tip holder 3 is installed on the backwashing tool holder 2, and the tool tip holder 3 is installed on the side of the backwashing tool holder 2 farther from the axis of the main shaft connecting part 1. A tool tip 4 is installed on the tool tip holder 3, and the tool tip 4 is installed on the side of the tool tip holder 3 close to the main shaft connecting part 1. A dynamic balance part 5 is connected to the backwashing tool holder 2, and the dynamic balance part 5 and the backwashing tool holder 2 form a dynamic balance tool holder, and the center of gravity of the dynamic balance tool holder is located on the axis of the main shaft connecting part 1.

[0033] In this embodiment, the backwashing tool holder 2 is eccentrically arranged relative to the main shaft connecting part 1. The overall width of the backwashing tool holder 2, the tool tip holder 3, and the tool tip 4 is smaller than the inner diameter of the opening of the workpiece 6 to be machined, so that the backwashing tool holder 2 can pass through the workpiece 6 to be machined to machine its back surface. The dynamic balance part 5 is installed on the backwashing tool holder 2, on the side opposite to the tool tip holder 3. The dynamic balance part 5 is rotatably connected to the backwashing tool holder 2, and a receiving groove is provided on the backwashing tool holder 2, and the dynamic balance part 5 can be rotated and received in the receiving groove.

[0034] When using the tool, first rotate the dynamic balance part 5 into the storage groove, then align the axis of the backwashing tool holder 2 with the center of the opening of the workpiece 6 to be machined, so that the backwashing tool holder 2 passes through the opening of the workpiece 6 to be machined. After passing through the opening, make the backwashing tool holder 2 perform a radial relative movement with the workpiece 6 to be machined, so that the tool head 4 is aligned with the surface to be machined of the workpiece 6. After the radial movement, the axis of the backwashing tool holder 2 is offset from the axis of the workpiece 6 to be machined, so that the axis of the workpiece 6 to be machined coincides with the axis of the main shaft. After the movement is completed, rotate the dynamic balance part 5 back to its original position from the storage groove. During the rotation of the main shaft, although the backwashing tool holder 2 is eccentrically arranged relative to the main shaft, the dynamic balance part 5 is also eccentrically arranged relative to the main shaft. The center of gravity of the overall dynamic balance tool holder formed by the two is located on the axis of the main shaft, thus forming a dynamic balance, so that during the rotation of the main shaft, the rotational speed can be increased to a relatively large value, improving the processing efficiency and preventing the situation of the tool head 4 flying out.

[0035] Embodiment 5, a backwashing surface forming tool, includes a main shaft connecting part 1 and a backwashing tool holder 2. The main shaft connecting part 1 is directly coaxially connected to the main shaft. A tool head seat 3 is installed on the backwashing tool holder 2, and the tool head seat 3 is installed on the side of the backwashing tool holder 2 farther from the axis of the main shaft connecting part 1. A tool head 4 is installed on the tool head seat 3, and the tool head 4 is installed on the side of the tool head seat 3 close to the main shaft connecting part 1. A dynamic balance part 5 is connected to the backwashing tool holder 2. The dynamic balance part 5 and the backwashing tool holder 2 form a dynamic balance tool holder, and the center of gravity of the dynamic balance tool holder is located on the axis of the main shaft connecting part 1.

[0036] In this embodiment, the backwashing tool holder 2 is eccentrically arranged relative to the main shaft connecting part 1. The overall width of the backwashing tool holder 2, the tool head seat 3, and the tool head 4 is smaller than the inner diameter of the opening of the workpiece 6 to be machined, so that the backwashing tool holder 2 can pass through the workpiece 6 to be machined to machine its back surface. The dynamic balance part 5 is installed on the backwashing tool holder 2, on the side opposite to the tool head seat 3. The dynamic balance part 5 is rotatably connected to the backwashing tool holder 2. A storage groove is provided on the backwashing tool holder 2, and the dynamic balance part 5 can be rotated and stored in the storage groove. A torsion spring is installed at the connection between the dynamic balance part 5 and the backwashing tool holder 2. The torsion spring makes the dynamic balance part 5 maintain a state of popping outwards.

[0037] When the tool is in use, align the axis of the backwashing tool holder 2 with the center of the opening of the workpiece 6 to be machined, and make the backwashing tool holder 2 pass through the opening of the workpiece 6 to be machined. During the process of passing through the opening, the dynamic balance part 5 is squeezed and retracted into the receiving groove. After passing through the opening, the dynamic balance part 5 pops out of the receiving groove and resets under the action of the torsion spring. At this time, then make the backwashing tool holder 2 move radially relative to the workpiece 6 to be machined, so that the tool tip 4 is aligned with the surface to be machined of the workpiece 6 to be machined. After the radial movement, the axis of the backwashing tool holder 2 is offset from the axis of the workpiece 6 to be machined, so that the axis of the workpiece 6 to be machined coincides with the axis of the main shaft. After the movement is completed, rotate the dynamic balance part 5 back to its original position from the receiving groove. During the rotation of the main shaft, although the backwashing tool holder 2 is eccentrically arranged relative to the main shaft, the dynamic balance part 5 is also eccentrically arranged relative to the main shaft. The center of gravity of the overall dynamic balance tool holder formed by the two is located on the axis of the main shaft, thus forming dynamic balance, enabling the rotational speed to be increased to a relatively large value during the rotation of the main shaft, improving the machining efficiency, and preventing the situation that the tool tip 4 flies out.

Claims

1. A backwash surface forming knife, characterized in that: It includes a main shaft connection part and a backwash knife seat, a cutter head seat is installed on the backwash knife seat, a dynamic balancing part is connected to the backwash knife seat, the dynamic balancing part and the backwash knife seat form a dynamic balancing knife seat, and the center of gravity of the dynamic balancing knife seat is located on the axis of the main shaft connection part.

2. A backwash surface forming knife according to claim 1, characterized in that: The cutter head seat is installed on the side of the backwash cutter seat that is farther from the axis of the main shaft connection part.

3. A backwash surface forming knife according to claim 1 or 2, characterized in that: A cutter head is mounted on the cutter head seat, and the cutter head is mounted on a side of the cutter head seat close to the main shaft connecting portion.

4. A backwash surface forming knife according to claim 1, characterized in that: The backwash knife seat is eccentrically arranged relative to the main shaft connecting part.

5. A backwash surface forming knife according to claim 4, characterized in that: The axis of the backwash knife seat and the axis of the dynamic balancing part are centrally symmetrical with the axis of the main shaft connecting part as the axis.

6. A backwash surface forming knife according to claim 1, characterized in that: The dynamic balancing part is installed between the main shaft connecting part and the backwashing knife seat.

7. A backwash surface forming knife according to claim 1, characterized in that: The dynamic balancing part is installed on the side of the backwashing knife seat.

8. The backwash surface forming knife according to claim 1, characterized in that: The dynamic balancing part is rotatably connected to the backwashing knife seat.

9. A backwash surface forming knife according to claim 8, characterized in that: A torsion spring is installed at the connection between the dynamic balancing part and the backwashing knife seat.

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