A kind of auxiliary support device for milling keyway of shaft parts

Abstract

The utility model relates to a kind of shaft parts milling keyway auxiliary supporting devices, at least including base, support block, mandrel and round nut;Through the inner hexagonal screw fixed installation on workbench, the through hole is opened in base;Support block includes vertical support block and horizontal support block, installation is in base;Vertical support block is equipped with the inner hole of vertical direction, horizontal support block is equipped with the inner hole of horizontal direction;Vertical support block and horizontal support block are equipped with threaded hole in its vertical inner hole axis direction;Mandrel includes vertical mandrel and horizontal mandrel, one end of mandrel is outer thread end, the other end is cylindrical end;The cylindrical end of vertical mandrel and horizontal mandrel is respectively installed in the inner hole of vertical support block and horizontal support block;The cylindrical end of mandrel is equipped with keyway, the opening of keyway is towards the threaded hole of support block;Round nut is installed in the outer thread end of mandrel, and is connected with support block.The utility model can improve machining precision and quality, and the utility model can improve production efficiency, reduce production cost.

Description

Technical Field

[0001] This utility model relates to an auxiliary support device for milling keyways on shaft parts, belonging to the field of machining technology. Background Technology

[0002] In the field of machining, some shaft parts require keyway milling at the spindle or gear assembly location (such as semi-circular keys). Most shaft parts have a high surface hardness after heat treatment. When milling keyways on the cylindrical surfaces of longer shaft parts, vibration often occurs during the cutting process. The higher the workpiece hardness, the greater the vibration, affecting the keyway's dimensions, positional accuracy, and surface roughness, especially positional accuracy and slot width. Exceeding these tolerances can affect assembly. If using carbide cutting tools, vibration can even cause chipping and damage to the tool. Therefore, it is necessary to provide support for the areas requiring keyway milling to reduce vibration during machining.

[0003] Currently, some existing auxiliary support devices are structurally complex, and their installation and debugging processes are cumbersome, requiring specialized technicians to spend a significant amount of time and effort to operate. This reduces production efficiency and increases production costs to some extent. Furthermore, some auxiliary support devices lack versatility, being only applicable to shaft parts of specific sizes and specifications, failing to meet diverse production needs. When companies need to process shaft parts of different sizes, they must frequently change auxiliary support devices, further increasing production complexity and costs. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides an auxiliary support device for milling keyways on shaft parts. This invention can effectively reduce vibration during the keyway milling process, improve machining accuracy and quality, and also increase production efficiency and reduce production costs.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: an auxiliary support device for milling keyways on shaft parts, comprising at least a base, a support block, a mandrel, and a round nut; the base has a through hole and is fixedly mounted on a workbench by an internal hexagon screw; the support block includes a vertical support block and a horizontal support block, mounted on the base; the vertical support block has a vertical inner hole, and the horizontal support block has a horizontal inner hole; the vertical and horizontal support blocks have threaded holes along their vertical inner hole axes; the mandrel includes a vertical mandrel and a horizontal mandrel, one end of the mandrel being an externally threaded end and the other end being a cylindrical end; the cylindrical ends of the vertical and horizontal mandrels are respectively installed in the inner holes of the vertical and horizontal support blocks; the cylindrical end of the mandrel has a keyway, the opening of which faces the threaded hole of the support block; the round nut is installed on the externally threaded end of the mandrel and connected to the support block.

[0006] Furthermore, the vertical support block and the horizontal support block are fixed to the base by welding, and the vertical intersection error of the center lines of the inner holes of the two support blocks does not exceed 1mm.

[0007] Furthermore, the vertical support block and the horizontal support block have threaded holes in their vertical inner hole axis direction that communicate with the inner hole.

[0008] Furthermore, the cylindrical end of the mandrel and the inner hole of the support block are clearance fit H7 / h7.

[0009] Furthermore, the vertical support block and the horizontal support block are fitted with set screws in the threaded holes provided in the direction of their vertical inner hole axis, and screwed into the keyway opened at the cylindrical end of the mandrel.

[0010] As can be seen from the above technical solution, the auxiliary support device for milling keyways on shaft parts provided by this utility model has the following advantages over the prior art:

[0011] (1) This utility model supports the workpiece from both vertical and horizontal directions in the opposite direction to the feed direction and in the direction at a 90-degree angle to it, and the two support force directions pass through the center of the workpiece along the line. This unique support method can effectively disperse the vibration generated during the milling of keyways, significantly improve the stability of the milling keyways, effectively reduce the deformation of shaft parts caused by milling force, thereby ensuring the quality requirements of keyway dimensional accuracy, positional accuracy and roughness, and improving the machining accuracy and quality of shaft parts.

[0012] (2) This utility model mainly consists of a base, support blocks, a mandrel, and a round nut, with a simple and clear structural design. The base is fixed to the workbench with internal hexagonal screws, and the installation process can be completed with simple operations, without complicated installation steps and professional tools, which greatly saves installation time and improves production preparation efficiency. The connection method between the vertical support blocks and the horizontal support blocks and the base, such as welding, is stable and reliable. Moreover, under the condition that the vertical intersection error of the center lines of the inner holes of the two support blocks does not exceed 1mm, it can be quickly positioned and installed, reducing the complicated operations in the installation and debugging process.

[0013] (3) The mandrel and the inner hole of the support block of this utility model adopt a clearance fit of H7 / h7. By adjusting the extension of the mandrel and the position of the base, the support requirements of shaft parts of different lengths and diameters can be met. It can be applied to the milling of keyways on shaft parts of various specifications and sizes. No matter how the size of the shaft parts changes, the auxiliary support device can continue to function simply by replacing the mandrel of the corresponding specification, which has high versatility. This reduces the cost for enterprises to replace auxiliary support devices for processing different shaft parts and improves production efficiency. Attached Figure Description

[0014] Figure 1Assembly front view of the auxiliary support device for milling keyways on shaft parts.

[0015] In the diagram: 1. Base; 2. Round nut; 3. Through hole; 4. Socket head screw; 5. Vertical support block; 6. Horizontal support block; 7. Inner hole; 8. Threaded hole; 9. Vertical spindle; 10. Horizontal spindle; 11. Keyway; 12. Set screw; 13. Workpiece. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0017] The technical solution provided by this utility model includes an auxiliary support device for milling keyways on shaft-type parts, such as... Figure 1 As shown, it includes at least a base 1, a support block, a spindle, and a round nut 2. The base 1 has a through hole 3 and is fixedly mounted on the workbench by an internal hexagon screw 4. The support block includes a vertical support block 5 and a horizontal support block 6, which are mounted on the base 1. The vertical support block 5 has a vertical inner hole 7, and the horizontal support block has a horizontal inner hole 7. The vertical support block 5 and the horizontal support block 6 have threaded holes 8 along the axis of their vertical inner holes 7. The spindle includes a vertical spindle 9 and a horizontal spindle 10, one end of which is an externally threaded end, and the other end is a cylindrical end. The cylindrical ends of the vertical spindle 9 and the horizontal spindle 10 are respectively installed in the inner holes 7 of the vertical support block 5 and the horizontal support block 6. The cylindrical end of the spindle has a keyway 11, and the opening of the keyway 11 faces the threaded hole 8 of the support block. The round nut 2 is installed on the externally threaded end of the spindle and connected to the support block.

[0018] Furthermore, the vertical support block 5 and the horizontal support block 6 are fixed to the base 1 by welding, and the vertical intersection error of the center lines of the inner holes 7 of the two support blocks does not exceed 1mm.

[0019] Furthermore, the threaded holes 8 provided in the vertical support block 5 and the horizontal support block 6 in the axial direction of their vertical inner holes 7 communicate with the inner holes 7.

[0020] Furthermore, the cylindrical end of the mandrel and the inner hole 7 of the support block are in clearance fit H7 / h7.

[0021] Furthermore, the vertical support block and the horizontal support block are fitted with set screws 12 in the threaded holes provided in the direction of their vertical inner hole axis, and screwed into the keyway 11 opened at the cylindrical end of the mandrel.

[0022] In this embodiment, the assembly and use process of this utility model is as follows:

[0023] like Figure 1As shown, vertical support block 5 and horizontal support block 6 are welded to base 1. The cylindrical ends of vertical mandrel 9 and horizontal mandrel 10 are respectively inserted into the inner holes 7 of vertical support block 5 and horizontal support block 6. Set screws 12 are inserted through the threaded holes 8 of vertical support block 5 and horizontal support block 6 until the set screws 12 are inserted into the keyways 11 of the cylindrical ends of vertical mandrel 9 and horizontal mandrel 10, so that the mandrel can move back and forth in the inner holes of the support blocks. The knurled round nuts 2 are installed on the external threaded ends of vertical mandrel 9 and horizontal mandrel 10. The position of base 1 is adjusted according to the position of the keyway to be milled on workpiece 13, so that the axis of horizontal mandrel 10 coincides with the feed direction, and the axis of vertical mandrel 9 passes through the center of workpiece 13. After adjusting the position of base 1, base 1 is fixed by two hexagon socket screws 4. During keyway milling, the round nut 2 is rotated so that the external thread ends of the vertical mandrel 9 and the horizontal mandrel 10 extend out and their end faces are in close contact with the surface of the workpiece 13. When the workpiece 13 is finished, the mandrels are withdrawn to avoid scratching the workpiece. The operation is simple and convenient, greatly reducing the vibration generated during keyway milling and improving the quality and stability of the machining.

Claims

1. An auxiliary support device for milling keyways on shaft-type parts, comprising at least a base, a support block, a mandrel, and a round nut, characterized in that: The base has a through hole and is fixed to the workbench with an internal hexagon screw. The support block includes a vertical support block and a horizontal support block, which are mounted on the base. The vertical support block has a vertical inner hole, and the horizontal support block has a horizontal inner hole. The vertical and horizontal support blocks have threaded holes along their vertical inner hole axes. The mandrel includes a vertical mandrel and a horizontal mandrel, with one end being an externally threaded end and the other end being a cylindrical end. The cylindrical ends of the vertical and horizontal mandrels are respectively installed in the inner holes of the vertical and horizontal support blocks. The cylindrical end of the mandrel has a keyway, with the keyway opening facing the threaded hole of the support block. A round nut is installed on the externally threaded end of the mandrel and connected to the support block.

2. The auxiliary support device for milling keyways on shaft parts according to claim 1, characterized in that: The vertical support block and the horizontal support block are fixed to the base by welding, and the vertical intersection error of the center lines of the inner holes of the two support blocks does not exceed 1mm.

3. The auxiliary support device for milling keyways on shaft parts according to claim 1, characterized in that: The vertical support block and the horizontal support block have threaded holes in their vertical inner hole axis direction that communicate with the inner hole.

4. The auxiliary support device for milling keyways on shaft parts according to claim 1, characterized in that: The cylindrical end of the mandrel and the inner hole of the support block are clearance fit H7 / h7.

5. The auxiliary support device for milling keyways on shaft parts according to claim 1, characterized in that: The vertical support block and the horizontal support block are fitted with set screws in threaded holes provided in the direction of their vertical inner axis, and screwed into the keyway opened at the cylindrical end of the mandrel.

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