TWI669184B - Rotary shaft cooling system with airflow guiding heat dissipation - Google Patents

Abstract

A shaft cooling system with airflow guiding heat dissipation, comprising: a spindle unit, a clamp unit, a blade unit and a tool head unit; the spindle unit provides a rotational torque, and the end portion is provided with a mounting portion; the clamp unit has a shaft body and a shaft body One end portion is detachably fixed to the mounting portion, and the other end portion of the shaft body is provided with a tool head clamping portion; the blade unit has a set of central holes fixed and fastened to the shaft body and a plurality of blades that are annularly disposed toward the center hole The tool head unit is detachably fixed to the tool head clamping portion to drive the blade unit to operate by the rotational torque of the spindle unit as the clamp unit rotates to create a heat dissipation function of the air circulation between the blade unit and the spindle unit. , reducing the heat transferred back to the spindle unit by the tool head unit.

Description

Rotary shaft cooling system with airflow guiding heat dissipation

The invention relates to a shaft cooling system, in particular to a shaft cooling system with air guiding heat dissipation applied to a combined rotating tool.

Generally, when a machining tool (such as a tool, an abrasive tool, or a friction stir tool) that rotates a rotating shaft to contact a workpiece is processed, when the processing tool contacts the workpiece, the processing tool generates high temperature (for example, friction stir). During the welding process, the friction stirrer will produce a high temperature of 500 ° C or higher. In this case, when the product enters mass production, the continuous processing high temperature generated by the processing tool will be transmitted to the main shaft of the equipment, which will accelerate the damage of the internal parts of the equipment for a long time. In the field of friction stir welding, especially in the production of aluminum alloy thick plate products, or the hot high melting point materials welded in recent years, the high temperature of mixing will cause the acceleration of the equipment parts and the wear of the mixing head!

Taking the friction stir welding machine as an example, as shown in FIG. 1 , the conventional friction stir tool is an integrated design, that is, the single head of the single head material integrally formed by the stirring head 121 and the mounting portion 122 mounted to the spindle unit 1 The tool 12 is agitated, and the structural design makes it easier to transfer the heat during processing directly and in large quantities to the spindle unit 1, thereby affecting the life of the spindle unit 1.

The object of the present invention is to apply a combined cutter to a spindle unit, and in combination with a blade unit that agitates the airflow, when the spindle unit rotates, airflow is generated to circulate heat.

In order to achieve the above object, the present invention provides a shaft cooling system with airflow guiding heat dissipation, comprising: a spindle unit providing a rotational torque, and a mounting portion at the end thereof; and a clamp unit having a shaft body. One end of the shaft is detachably fixed to the mounting portion, so that the other end of the shaft is provided with a tool head clamping portion as the spindle unit rotates; and a blade unit has a set tightly a plurality of blades fixed to the central hole of the shaft and the central hole of the ring; a tool head unit removably fixed to the tool head clamping portion for rotation with the clamp unit.

In one embodiment, the tool head unit is a cutting tool or a grinding tool.

In one embodiment, the tool head unit is a stirring head of a Friction Stir Welding tool.

In an embodiment, the blade unit is mounted to the shaft of the clamp unit in a heat jacket assembly manner.

In an embodiment, the stirring head clamping portion of the clamp unit protrudes from the shaft to form a shoulder, and the blade unit abuts against the shoulder.

In one embodiment, the blade unit is made of a highly thermally conductive material.

In one embodiment, the blades are shaped by their angle of inclination or curved surface to cause the air around the blade to flow toward the shaft when the clamp unit is rotated.

In an embodiment, the spindle unit is disposed in a machine tool housing, and the machine tool housing can move synchronously with the spindle unit, but does not rotate. The shaft cooling system further includes a shroud unit. Having a fixing portion and a cover portion for mounting to the machine tool housing and enclosing the spindle unit, the cover portion has a cover opening facing the blade unit on one side, the flow guide cover is adjacent to The A plurality of through holes are disposed in the spindle unit, and the cover body is provided with a tapered surface that is contracted toward the fixing portion by the cover, and the through holes are disposed on the tapered surface.

The present invention is characterized in that the present invention is applied to a spindle unit by a combination cutter (combined by a clamp unit, a blade unit, and a tool head unit) so that the heat of the tool head unit is not directly and completely transmitted to the spindle unit. The blade unit applied in the combined cutter can apply the torque of the rotation of the spindle unit, drive the blade unit to rotate, guide the air to generate air circulation convection, improve the heat dissipation capability of the combined tool, and further select a high thermal conductivity material. After the blade unit is made, the heat exchange efficiency can be further improved; the creation can simultaneously dissipate heat during the processing, and for the specific processing type that is not suitable for using the external air cooling device, such as friction stir welding, the creation may not The external unit air-cooling equipment (air-cooling equipment should not be used during the mixing process) can dissipate heat from the spindle unit and the tool head unit.

A‧‧‧Tool Machine

B‧‧‧ machine base

AF‧‧‧ airflow

HF‧‧‧ heat flow

S‧‧‧ interval

1‧‧‧ spindle unit

11‧‧‧Installation Department

12‧‧‧Integral mixing tool

121‧‧‧Stirring head

122‧‧‧Installation Department

2‧‧‧Clamp unit

21‧‧‧ shaft

22‧‧‧Tool head clamping

23‧‧‧ Shoulder

3‧‧‧Wind leaf unit

31‧‧‧ center hole

32‧‧‧ blades

4‧‧‧Tool head unit

41‧‧‧ head end

42‧‧‧Installation end

421‧‧‧ end face

5‧‧‧Shroud unit

51‧‧‧ Fixed Department

52‧‧‧ Cover

521‧‧‧ Cover

53‧‧‧ Cone

54‧‧‧through holes

[Fig. 1] is a tool head unit of one of the prior art; [Fig. 2] is a front exploded view of the shaft cooling system with airflow guiding heat dissipation effect of the present invention; [Fig. 3] An exploded view of the combined tool of the heat-dissipating shaft cooling system; [Fig. 4] is a perspective assembled view of Fig. 3; [Fig. 5] is a front cross-sectional view of Fig. 4; [Fig. 6] is a non-conducting flow of Fig. 2. A front view combination view of the cover unit; [Fig. 7] is a front view combination view of Fig. 2.

The present invention is described in detail below with reference to the drawings. The drawings are mainly simplified schematic diagrams, and only the basic structure of the present invention is illustrated in a schematic manner, so only the components related to the present creation are indicated in the drawings. The components shown are not drawn in the number, shape, size ratio, etc. at the time of implementation, and the actual size of the implementation is a selective design, and the component layout form may be more complicated.

Please refer to FIG. 2, FIG. 3, FIG. 4 and FIG. The rotating shaft heat dissipation system with the airflow guiding heat dissipation function of the embodiment is mainly applied to a rotating shaft (for example, a machine tool A main shaft), which comprises: a spindle unit 1, a clamp unit 2, a blade unit 3 and a tool head unit. 4. The spindle unit 1 is provided with a rotational torque. The end of the spindle unit 1 is provided with a mounting portion 11; the clamp unit 2 is generally a steel product having a shaft 21, and the shaft 21 is detachable at one end. The mounting portion 11 is fixed to the mounting portion 11 of the spindle unit 1 so that the clamp unit 2 rotates with the rotation of the spindle unit 1. The other end portion of the shaft 21 is provided with a tool head clamping portion 22; The unit 3 has a set of central holes 31 which are fastened to the shaft 21 and a plurality of blades 32 disposed around the central hole 31. The fastening method can be adopted by a hot sleeve assembly method, but The fastening method is limited; the tool head unit 4 (the tool head unit 4 may be a cutting tool, a grinding tool or a welding tool, such as the friction stir welding tool cited in this embodiment) is removably fixed to the tool head unit 4 The tool head holding portion 22 of the gripper unit 2 is rotated in accordance with the rotation of the gripper unit 2. The clamp unit 2, the blade unit 3, and the tool head unit 4 are combined into a combined cutter.

As shown in FIG. 6, with the above structure, when the spindle unit 1 rotates, the blade unit 3 can rotate accordingly, so that the blades 32 can guide the external air of the combined cutter to form a circulating airflow to combine The heat on the cutter heats off, for example, the blades 32 are shaped by their inclination or curved surface. When the clamp unit 2 is rotated, the air around the vane 32 is guided to flow in the direction of the shaft 21, as indicated by the dotted arrow in FIG.

Of course, in another embodiment, the vanes 32 are applied with their inclination or curved shape to guide the air around the vane 32 to flow away from the shaft 21 when the gripper unit 2 rotates.

Further, as shown in FIG. 2 and FIG. 7 , the spindle unit 1 is disposed on a machine tool A base B. The base B of the machine tool A can move synchronously with the spindle unit 1 but does not follow The rotating shaft heat dissipating system further includes a shroud unit 5 having a fixing portion 51 and a cover portion 52 for mounting to the base B of the machine tool A and enclosing the main shaft The unit 1 has a cover opening 521 facing the blade unit 3 on the side of the cover portion 52. The guide cover unit 5 is provided with a plurality of through holes 54 near the spindle unit 1.

In the embodiment of the shroud unit 5, the cover portion 52 is provided with a tapered surface 53 which is contracted toward the fixing portion 51 by the cover opening 521. Preferably, the through holes 54 are disposed on the tapered surface. 53 on.

In an embodiment, as shown in Figures 3 and 5. In this embodiment, the tool head unit 4 includes a head end 41 of a workpiece (not shown) and a mounting end 42 for inserting the tool head clamping portion 22, after installation (the usual mounting method is the tool head) The clamping portion 22 is provided with a concave screw hole, the mounting end 42 is a convex screw, and the two are screwed together. The mounting end 42 faces the end surface 421 of the tool head clamping portion 22 and the tool head clamping portion. The air-filled space S is maintained such that the end surface 421 does not abut against the tool head clamping portion 22 to reduce the direct transfer of heat from the tool head unit 4 to the clamp unit 2.

According to the above, further, when the blade unit 3 is made of a high heat conductive material (such as aluminum), when the heat of the tool head unit 4 is transmitted to the blade unit 3, the blade unit 3 can be quickly The heat is absorbed and emitted into the air (the heat flow HF indicated by the solid arrow in Fig. 7), and the heat transferred from the tool head unit 4 to the clamp unit 2 can be reduced.

In order to securely mount the blade unit 3 above the tool head clamping portion 22 of the clamp unit 2, the tool head clamping portion 22 protrudes from the shaft 21 to form a shoulder portion 23, and the blade The unit 3 is abutted against the shoulder 23.

The above-described embodiments are merely illustrative of the principles, features, and effects of the present invention, and are not intended to limit the scope of the present invention. Anyone skilled in the art can do so without departing from the spirit and scope of the present invention. The embodiment is modified and changed. Any equivalent changes and modifications made using the content disclosed in this work should be covered by the scope of the following patent application. Therefore, the scope of protection of this creation should be as listed in the scope of patent application.

Claims (8)

A shaft cooling system with airflow guiding heat dissipation function, comprising: a spindle unit providing a rotational torque, the end portion being provided with a mounting portion; and a clamp unit having a shaft body, the shaft body being detachable at one end The blade unit is fixed to the mounting portion such that the clamp unit rotates with the spindle unit, and the other end of the shaft is provided with a tool head clamping portion; a blade unit has a set and is fastened to the rod a central hole of the body and a plurality of blades disposed around the central hole; and a tool head unit removably secured to the tool head clamping portion for rotation with the clamp unit, wherein the tool head unit includes a front end of the workpiece and a mounting end for inserting the tool head clamping portion, the end surface of the mounting end facing the tool head clamping portion is spaced from the tool head clamping portion such that the end surface does not abut the Tool head clamping section. The shaft cooling system with airflow guiding heat dissipation according to claim 1, wherein the tool head unit is a cutting tool, a grinding tool or a welding tool. The shaft cooling system with airflow guiding heat dissipation according to claim 1, wherein the tool head unit is a friction stir welding tool. The shaft cooling system with airflow guiding heat dissipation function according to claim 1, wherein the blade unit is mounted to the shaft of the clamp unit in a hot sleeve assembly manner. The shaft cooling system of claim 1 or 4, wherein the tool head clamping portion of the clamp unit protrudes from the shaft to form a shoulder, and the blade unit is Rely on the shoulder. The shaft cooling system with airflow guiding heat dissipation according to claim 1, wherein the blade unit is made of a high thermal conductivity material. A shaft cooling system with airflow guiding heat dissipation function, comprising: a spindle unit providing a rotational torque, the end portion being provided with a mounting portion; and a clamp unit having a shaft body, the shaft body being detachable at one end The blade unit is fixed to the mounting portion such that the clamp unit rotates with the spindle unit, and the other end of the shaft is provided with a tool head clamping portion; a blade unit has a set and is fastened to the rod a central hole of the body and a plurality of blades disposed around the central hole; and a tool head unit removably fixed to the tool head clamping portion for rotating with the clamp unit, wherein the blades apply The angle of inclination or the curved surface is configured to guide the air around the blade to the direction of the shaft when the clamp unit rotates, the spindle unit is disposed on a machine tool base, and the machine tool base can move synchronously with the spindle unit The rotating shaft heat dissipating system further includes a shroud unit having a fixing portion and a cover portion for mounting to the machine tool base and enclosing the spindle unit , the a side of the body has a cover facing the blade unit, and the guide cover is provided with a plurality of through holes near the spindle unit, and the cover portion is provided with a tapered surface that is contracted toward the fixed portion by the cover. The through holes are disposed on the tapered surface. The shaft cooling system with airflow guiding heat dissipation according to claim 1, wherein the blades are shaped by inclination or curved surface, so that the air around the blade is guided to flow away from the shaft when the clamp unit rotates. .