TWI664040B - An assisted milling shaft apparatus - Google Patents

Abstract

An auxiliary milling spindle device includes a spindle base, a spindle, a tool holder, a laser light source, and an optical component. The spindle seat is provided with an accommodation space and the first passage is disposed outside the accommodation space. The first channel is in communication with a cooling gas source. The mandrel is disposed in the accommodation space and has a second channel. The handle is engaged with the mandrel. The handle has a third channel and a cavity. The third channel communicates with the first and second channels. The chamber is located outside the third channel. The third channel has first and second through holes in communication with the chamber, and the chamber has first and second light outlets. The laser light source is set on the spindle base. The laser light source emits a laser beam toward the handle through the second channel. The optical component is arranged in the knife handle, and the laser beam can be divided into first and second laser beams, and the first and second laser beams can be emitted from the first and second light exit ports, respectively.

Description

Auxiliary milling spindle device

The present invention relates to a processing device, and more particularly, to an auxiliary milling spindle device.

The laser can quickly increase the temperature of the surface of the material without affecting the characteristics of the substrate. Laser assisted machining technology is a common precision machining technology, which is mainly applied to difficult-to-machine materials such as mold industry, aerospace industry, and medical industry, such as ceramics, superalloys and other materials that are difficult to directly cut.

Purdue University proposed a laser machining assisted turning device. After the laser processing auxiliary turning device is used to heat and soften the material to be processed, the tool is then used to heat and soften the material to cut and remove the heated and softened material. However, since the heating area formed by the laser on the material does not have the same point with the tool, the laser processing auxiliary turning device is only suitable for turning processing devices.

German DaimlerChrysler AG company installs laser processing equipment on machine tools. The multi-degree-of-freedom rotation device is used with path planning, so that the laser can follow the cutting path to maintain a stable temperature field. The heating area formed by the laser on the processing material is offset from the cutting tool value. Because the laser heating area of this processing device is not in common with the tool, it is easy to cause erroneous heating on the curved path, which deforms the material in the non-processing area, but the area to be processed does not receive laser heating. Therefore, this device has geometric limitations in practical application, and it is easy to cause a difference in temperature between hot and cold.

The German Jenoptik company introduced the laser source into the processing spindle, and through the hollow type tool, the material can be removed by laser processing and cutting. However, because the bottom of the hollow-type tool has no cutting edge, it cannot be efficiently processed, and curved surfaces cannot be processed.

There are also some laser-assisted cutting techniques that use lasers to heat the workpiece for preheating. In this technology, the distance between the laser light point and the cutting edge of the tool is about several μm to several tens of μm, and a cooling system is used to assist the tool in dissipating heat. However, the distance between the laser beam and the cutting edge of the cutting tool is too short, which seriously affects the service life of the cutting tool. In addition, this laser-assisted cutting device locks turning only in one-direction machining paths and cannot be applied to the milling process.

Therefore, an object of the present invention is to provide an auxiliary milling spindle device. The spindle in the spindle seat has a laser beam channel. In addition to providing a space for optical path travel, the laser beam channel can also be passed through clean gas for the spindle. The cooling of the core and the positive pressure inside the mandrel prevent external oil and gas from penetrating and affecting the cleanliness of the inside of the spindle seat, and can extend the service life of the optical components.

Another object of the present invention is to provide an auxiliary milling spindle device. In addition to a laser beam channel provided in the spindle, a cooling airflow channel is also provided outside the spindle of the spindle holder, so that the spindle holder can be cooled more effectively.

According to the above object of the present invention, an auxiliary milling spindle device is proposed. The auxiliary milling spindle device includes a spindle base, a spindle, a tool holder, a laser light source, and an optical component. The spindle seat has an accommodation space, and a first passage is provided outside the accommodation space, wherein the first passage is in communication with a cooling gas source. The mandrel is disposed in the accommodation space, wherein the mandrel has a second channel extending along the axial direction of the mandrel. The tool holder is engaged with the mandrel and protrudes from one end of the spindle seat. The tool holder has a third channel and a cavity. The third channel extends along the axial direction and communicates with the first channel and the second channel. The cavity is located outside the third channel, wherein a sidewall of the third channel has a first through hole and a second through hole in communication with the cavity, and a bottom of the cavity has a first light outlet and a second light outlet. The laser light source is disposed on the spindle base and is opposite to the tool holder, wherein the laser light source is configured to emit a laser beam toward the tool holder via the second channel. The optical component is arranged in the handle, and is configured to divide the laser beam into a first laser beam and a second laser beam, and make the first laser beam and the second laser beam from the first light exit port and the second light exit, respectively. Mouth shot.

According to an embodiment of the present invention, the optical component includes a beam splitter, a first reflector, a second reflector, and a third reflector. The beam splitter is disposed in the third channel of the handle, and is configured to divide the laser beam into a chamber where the first laser beam is directed toward the handle, and a third channel where the second laser beam is directed toward the handle. The first reflecting mirror is disposed in the cavity, and is configured to reflect the first laser beam to the first light exit and exit. The second reflector is disposed in the third channel, and is configured to emit the second laser beam into the chamber through the second through hole. The third reflector is disposed in the cavity, and is configured to reflect the second laser beam to the second light exit hole and exit.

According to another embodiment of the present invention, the above-mentioned beam splitter is a half mirror.

According to another embodiment of the present invention, the second channel is in communication with a cooling gas source.

According to an embodiment of the present invention, the above-mentioned laser light source is an optical fiber laser source.

According to an embodiment of the present invention, the material of the mandrel is steel.

100‧‧‧ auxiliary milling spindle device

110‧‧‧ Spindle

112‧‧‧accommodation space

114‧‧‧first channel

114a‧‧‧ opening

114b‧‧‧ opening

120‧‧‧ mandrel

120a‧‧‧ axial

122‧‧‧Second Channel

130‧‧‧ Knife handle

132‧‧‧third channel

132a‧‧‧First through hole

132b‧‧‧Second through hole

132c‧‧‧perforation

132d‧‧‧perforated

132s‧‧‧ sidewall

134‧‧‧ chamber

134a‧‧‧First light exit

134b‧‧‧Second light exit

134u‧‧‧ bottom

140‧‧‧laser light source

150‧‧‧Optical components

152‧‧‧ Beamsplitter

154‧‧‧first mirror

156‧‧‧Second Mirror

158‧‧‧Third reflector

160‧‧‧cooling gas source

162‧‧‧pipe

164‧‧‧pipe

170‧‧‧laser beam

172‧‧‧First laser beam

174‧‧‧second laser beam

In order to make the above and other objects, features, advantages, and embodiments of the present invention more comprehensible, the description of the attached drawings is as follows: [FIG. 1] is an auxiliary milling spindle device according to an embodiment of the present invention And [Fig. 2] is a partially enlarged schematic view showing an auxiliary milling spindle device according to an embodiment of the present invention.

In view of the shortcomings of the conventional laser auxiliary processing device, the present invention proposes an auxiliary milling spindle device that introduces a laser light source into the spindle device to maintain a coaxial design. In addition, through the design change of the main shaft, in addition to the laser beam channel inside the mandrel, a cooling airflow channel is also provided outside the mandrel, thereby achieving the effects of light path guidance and internal heat dissipation. In addition, the response machine When machining the oil and gas in the use environment, clean air can be introduced into the laser beam channel inside the mandrel to maintain a positive pressure inside the spindle seat. This can prevent external oil and gas from penetrating and affect the transmission of the laser beam and even cause Excessive laser density causes damage to the lenses of the optical components, thereby extending the life of the optical components.

Please refer to FIG. 1 and FIG. 2, which respectively illustrate an apparatus schematic diagram and a partially enlarged schematic diagram of an auxiliary milling spindle device according to an embodiment of the present invention. The auxiliary milling spindle device 100 may be mounted on a processing machine to perform milling processing on a workpiece to be processed. In some embodiments, the auxiliary milling spindle device 100 may mainly include a spindle base 110, a spindle 120, a tool holder 130, a laser light source 140, and an optical assembly 150.

As shown in FIG. 1, the spindle base 110 has an accommodation space 112 and a first passage 114, wherein the first passage 114 is disposed outside the accommodation space 112. The first passage 114 may be a cooling gas passage. The first channel 114 can communicate with the cooling gas source 160 through the pipeline 162, whereby the cooling gas source 160 can use the pipeline 162 to send cooling gas into the first channel 114 to cool the mandrel 120. The cooling gas stored in the cooling gas source 160 may be, for example, clean air.

The mandrel 120 is disposed in the accommodation space 112 of the spindle base 110. The mandrel 120 has an axial direction 120a along its length. In some examples, the mandrel 120 may be rotatably installed in the accommodating space 112 with its axial direction 120 a being a rotation axis. The mandrel 120 has a second channel 122. The second channel 122 extends through the mandrel 120 along the axial direction 120 a of the mandrel 120. In some examples, the second channel 122 of the mandrel 120 can communicate with the cooling gas source 160 through the pipeline 164, whereby the cooling gas source 160 can also use the pipeline 164 to transfer the cooling gas. It is conveyed into the second channel 122 to cool the mandrel 120. The first channel 114 of the spindle base 110 may also extend along the axial direction 120 a of the spindle 120 on the outside of the spindle 120. For example, the material of the mandrel 120 may be steel.

The tool holder 130 is disposed at one end of the mandrel 120 and is engaged with the mandrel 120. In addition, the tool holder 130 protrudes from one end of the spindle base 110. The tool holder 130 has a third channel 132 and a cavity 134. The third channel 132 of the handle 130 may extend along the axial direction 120 a of the spindle 120 and communicate with the second channel 122 of the spindle 120. The cavity 134 is located outside the third channel 132. As shown in FIG. 2, in this embodiment, a sidewall 132 s of the third channel 132 of the handle 130 has a first through hole 132 a and a second through hole 132 b. Through the first through hole 132a and the second through hole 132b, the third channel 132 can communicate with the chamber 134. In addition, the bottom 134u of the chamber 134 has a first light exit 134a and a second light exit 134b. Through the first light exit 134a and the second light exit 134b, the cavity 134 can communicate with the outside world.

Referring to FIG. 2, openings 114 a and 114 b may be provided at the bottom of the first channel 114. The cooling gas in the first passage 114 can be discharged from the spindle base 110 through the openings 114a and 114b. In some exemplary examples, the side walls 132s of the third channel 132 of the handle 130 may have perforations 132c and 132d. Through the openings 114a and 114b of the first channel 114 and the through-holes 132c and 132d of the side wall 132s of the third channel 132, the first channel 114 and the third channel 132 can communicate with each other through the openings 114a and 114b of the first channel 114. The discharged cooling gas can flow into the third channel 132 through the perforations 132c and 132d, and then be discharged from the third channel 132 and the cavity 134 of the knife handle 130.

Please refer to FIG. 1 and FIG. 2 again, the laser light source 140 is disposed on the spindle base 110 and is opposite to the tool holder 130. The laser light source 140 may emit a laser beam 170. In some exemplary examples, the laser light source 140 may be a fiber optic laser source. Since the second channel 122 of the spindle 120 is in communication with the third channel 132 of the handle 130, the laser beam 170 emitted by the laser light source 140 can be directed to the third channel of the handle 130 through the second channel 122 of the spindle 120. 132. In addition, the second channel 122 of the mandrel 120 is also in communication with the cooling gas source 160. The cooling gas supplied by the cooling gas source 160 can flow into the second channel 122 and the third channel 132 of the knife handle, which can not only cool the mandrel 120, but also A positive pressure is formed inside the mandrel 120 and the tool holder 130 to prevent oil and gas from the processing environment from penetrating into the mandrel 120 and the tool holder 130. Therefore, the second channel 122 and the third channel 132 of the mandrel 120 are not only the optical path of the laser beam 170 but also the cooling gas channel.

The optical component 150 is disposed in the knife holder 130 and can divide the laser light beam 170 of the laser light source 140 toward the knife holder 130 into a first laser beam 172 and a second laser beam 174, and can make the first laser beam 172 and The second laser beam 174 is emitted from the first light exit 134a and the second light exit 134b of the chamber 134 of the knife holder 130, respectively, to form a coaxial dual laser beam. In some examples, as shown in FIG. 1, the optical assembly 150 includes a beam splitter 152, a first reflector 154, a second reflector 156, and a third reflector 158. The beam splitter 152 can be disposed along the axial direction 120 a of the mandrel 120 in the third channel 132 provided in the handle 130, and the first reflector 154 is disposed in the cavity 134 of the handle 130 and located on one side of the beam splitter 152 The second mirror 156 is also disposed in the third channel 132 and may be located below the beam splitter 152, and the third mirror 158 is disposed in the cavity 134 and located on the other side of the beam splitter 152, that is, the first mirror 154 With the first The three reflecting mirrors 158 are respectively located on two opposite sides of the beam splitter 152. In some exemplary examples, the beam splitter 152 is a half mirror. In this embodiment, the positions of the first through-hole 132a and the second through-hole 132b of the third channel 132, and the first and second light-outlets 134a and 134b of the cavity 134 correspond to the beam splitter 152 and the first The positions of the reflecting mirror 154, the positions of the second reflecting mirror 156 and the third reflecting mirror 158, the positions of the first reflecting mirror 154, and the positions of the third reflecting mirror 158 are designed.

Please refer to FIG. 1 and FIG. 2 again. When the laser beam 170 generated by the laser light source 140 is directed to the beam splitter 152, the beam splitter 152 can split the laser beam 170 into two laser beams. The first laser beam 172 is directed toward the first mirror 154 in the cavity 134 of the handle 130 through the first through hole 132a of the side wall 132s of the third channel 132, and the second laser beam 174 is directed toward the handle 130. The second mirror 156 in the third channel 132. When the beam splitter 152 is a half mirror, the beam splitter 152 reflects a part of the laser beam 170 to form a first laser beam 172, and the other part of the laser beam 170 passes through the beam splitter 152 to become a second laser. Light beam 174. The first reflector 154 may further reflect the first laser beam 172 to the first light exit 134 a of the bottom 134 u of the cavity 134 and emit the first laser beam 172. The second mirror 156 can pass the second laser beam 174 into the third mirror 158 in the cavity 134 through the second through hole 132 b of the side wall 132 s of the third channel 132. The third reflecting mirror 158 can further reflect the second laser beam 174 to the second light exit hole 134b of the bottom 134u of the cavity 134 and exit.

The laser light source 140 is used to guide the laser beam 170 from the rear end of the hollow spindle base 110, and the double laser beam is formed through the light splitting of the optical component 150. Beam, and guide the laser beam to focus on the preheating area of the workpiece to be processed, so as to quickly soften the workpiece material in advance to reduce the cutting force. In addition, the hollow spindle base 110 can have a laser beam guiding channel and an internal lens cooling and cooling airflow channel at the same time, thereby assisting the milling process and avoiding the temperature rise of the mandrel 120 and the optical component 150. In addition, the first channel 114 and the second channel 122 inside the spindle base 110 can pass in clean gas, and a positive pressure environment is formed inside the spindle base 110, and the oil and gas of the external environment can be prevented from penetrating into the spindle base 110, thereby avoiding optical The lenses of the assembly 150 are contaminated, and thus are suitable for machining in oil and gas environments. In addition, the optical component 150 is used to design the light path so that the two beams are irradiated to both sides of the processing area of the workpiece to be processed, thereby achieving a uniform temperature field distribution in the processing area.

Although the present invention has been disclosed as above by way of example, it is not intended to limit the present invention. Any person with ordinary knowledge in this technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the appended patent application.

Claims (5)

An auxiliary milling spindle device includes: a spindle base having an accommodating space and a first channel provided outside the accommodating space, wherein the first channel is in communication with a cooling gas source; and a mandrel provided in the container. In the installation space, the mandrel has a second channel extending axially along one of the mandrels; a tool holder is engaged with the mandrel and protrudes from one end of the spindle holder, wherein the tool holder has: a third channel Extending along the axial direction and communicating with the first channel and the second channel; and a chamber located outside the third channel, wherein one side wall of the third channel has a first through hole and a second channel A through hole communicates with the chamber. A bottom of one of the chambers has a first light outlet and a second light outlet; a laser light source is provided on the spindle base and opposite to the tool holder, wherein the laser light source is configured A laser beam is emitted toward the knife holder via the second channel; and an optical component is disposed in the knife holder and configured to divide the laser beam into a first laser beam and a second laser beam, and Aligning the first laser beam with the second laser Light beams from the first light outlet port and the second light exit. For example, the auxiliary milling spindle device of the first scope of the patent application, wherein the optical component includes a beam splitter provided in the third channel of the tool holder and configured to divide the laser beam into the first laser beam. The cavity toward the knife holder and the second laser beam are directed toward the third channel of the knife holder; a first reflector is disposed in the cavity and is configured to reflect the first laser light to the knife holder; A first light exit port; a second reflecting mirror disposed in the third channel and configured to enter the second laser beam into the chamber through the second through hole; and a third reflecting mirror, provided And is configured in the chamber to reflect the second laser beam to the second light emitting hole and exit. For example, the auxiliary milling spindle device of the second scope of the patent application, wherein the beam splitter is a half mirror. For example, the auxiliary milling spindle device of the first scope of the patent application, wherein the second channel is in communication with the cooling gas source. For example, the auxiliary milling spindle device of the first patent application range, wherein the laser light source is an optical fiber laser source.