DE102022121237A1 - Drilling device with a suction unit - Google Patents

Abstract

Drilling device (1) with a suction unit (2), which drilling device (1) comprises a drilling tool (3) which is guided radially and axially in a bushing (21) of the suction unit (2), the suction unit (2) having a drive unit (4) connectable adapter section (23) and a flange section (22), the socket (21) being rotatably mounted in the flange section (22), the socket (21) comprising at least one suction opening (211) on one end face, through which an air flow can be directed via a suction channel (212) to a suction connection (231) arranged on the adapter section (23).

Description

The invention relates to a drilling device with a suction unit according to the independent claim.

The invention lies in the technical field of tools for metal-cutting manufacturing processes, in particular drilling devices for producing holes in plastic, such as carbon fiber-reinforced plastic, and for removing chips created during machining.

The production of holes in plastic, especially in carbon fiber-reinforced plastic, is an important task in new developments, especially in road or air traffic or in mechanical and plant engineering, where resource-saving requirements are placed on design and construction.

For example, in the DE 10 2020 130 445 A1 a suitable cutting tool for processing plastic is shown, which can be part of a drilling device.

The drilling diameters to be produced are often in the range of 10 - 60 mm. When drilling such large holes in carbon fiber reinforced plastic, unstable drilling conditions arise and particular attention is paid to avoiding delamination and fiber protrusions at the hole exit. The problem that arises is that material removed in the form of chips or fibers, which is created during the production of the borehole, can significantly worsen the quality of the processing.

The invention has the object of providing a drilling device which overcomes the disadvantages of the prior art and enables larger holes to be produced in good quality while reducing the presence of fibers and chips.

The task is solved by a drilling device with a suction unit with the features of the independent claim.

The invention comprises a drilling device with a suction unit, which drilling device comprises a drilling tool which is guided radially and axially in a bushing of the suction unit. The suction unit includes an adapter section that can be connected to a drive unit and a flange section. The bushing is rotatably mounted in the flange section. The socket comprises at least one suction opening on one end face, through which an air flow can be directed via a suction channel to a suction connection arranged on the adapter section. Due to the suction unit with the suction opening arranged on the front side through which an air stream is guided to the adapter section, the removed material can be reliably guided away from the processing point when producing large drill holes.

According to a preferred technical aspect, the socket comprises three suction openings on one end face. The openings can be arranged elongated at the same radial distance (from a central axis).

The socket is particularly advantageously designed to be double-walled and the three suction openings lead an air flow to the opposite end section of the socket via a suction channel guided inside the wall. The wall can be designed in such a way that the air flow exits to the side.

The socket advantageously includes guide strips. For this purpose, three parallel strips can be arranged, evenly distributed along the inner circumference of the bushing, which engage in the side wall of the drilling tool.

The socket preferably includes air guiding elements on the front side. The air guide elements can be designed in a blade-like manner distributed at equal intervals along the circumference in order to generate an air flow directed in the axial direction of the drilling tool when the bushing moves together with the drilling tool.

The flange section particularly preferably comprises an air supply connection.

The air supply connection is advantageously connected to an air supply channel. The air supply channel has a first outlet in the area of the suction opening on the end face of the socket arranged in the flange section.

The air supply connection is particularly advantageously connected to an air supply channel. The air supply channel includes a second outlet at the end section, which is opposite the end face with the suction opening of the socket arranged in the flange section.

The air supply port may be a radially arranged nozzle designed to direct an adjustable (variable) amount of air between the flange portion and the bushing.

The invention is further explained below using the examples shown in the drawings.

• 1 eine teilweise geöffnete perspektivische Darstellung einer Bohrvorrichtung mit einer Absaugeinheit gemäß einem Ausführungsbeispiel der Erfindung;
• 2 eine seitliche Schnittansicht der Bohrvorrichtung aus 1;
• 3 eine Detaildarstellung einer Buchse für die Bohrvorrichtung aus 1;
• 4 eine seitliche Schnittansicht der Buchse aus 1;
• 5 eine Detaildarstellung eines Flanschabschnitts für die Bohrvorrichtung aus 1;
• 6 eine seitliche Schnittansicht des Flanschabschnitts aus 1; und
• 7 eine Detaildarstellung eines mit dem Adapterabschnitt verbundenen Flanschabschnitts für die Bohrvorrichtung aus 1.

Show it:

• 1 a partially opened perspective view of a drilling device with a suction unit according to an embodiment of the invention;
• 2 a side sectional view of the drilling device 1 ;
• 3 a detailed view of a bushing for the drilling device 1 ;
• 4 a side sectional view of the socket 1 ;
• 5 a detailed representation of a flange section for the drilling device 1 ;
• 6 a side sectional view of the flange section 1 ; and
• 7 a detailed representation of a flange section for the drilling device connected to the adapter section 1 .

In 1 is a schematic representation of a drilling device 1 with a suction unit according to an embodiment of the invention.

The drilling device 1 has a drilling tool 3 which is guided radially and axially in a bushing 21 of the suction unit 2. The bushing 21 guides the drilling tool 3 radially and axially using guide strips (see 4 ) and rotates together with it. For this purpose, the bushing 21 is held in two ball bearings in the flange section 22, see 2 .

The suction unit 2 has an adapter section 23 that can be connected to a drive unit 4 and a flange section 22. The adapter section 23 has a suction connection 231 and openings 232 for sucking in ambient air. The openings 232 can be closed if necessary or, for example, provided with valves in order to adjust the strength of the external air supply.

The socket 21 has three elongated suction openings 211 on the left end, through which a suction channel ( 2 , reference number 212) an air flow can be directed to a suction connection 231 arranged on the adapter section 23. This means that material removed during the drilling process can be reliably removed.

In 2 is a sectional view of the drilling device 1 1 shown.

The drilling device 1 has a drilling tool 3 which is guided radially and axially in the bushing 21 of the suction unit 2. The bushing 21 rotates together with the drilling tool 3. For this purpose, the bushing 21 is held in the flange section 22 in two ball bearings 5.

The flange section 22 has an air supply connection 221 on the top, which is still in connection with 5 is explained.

As in 3 As can be seen, the socket 21 is equipped with three suction openings 211 on one end face.

The socket 21 is double-walled in order to suck out fiber material or dust through the cavity in the wall. In the front, outer area of the socket 21, air guide elements 216 are attached in order to direct the annularly distributed supply air from the flange section to the front. The air directed forward serves as an “air curtain” or “barrier air” to keep the environment free of drilling dust and to protect the bearings between flange section 22 and bushing 21.

In addition, the drilling tool 3 used can have tool cooling. The medium used for cooling can also be discharged via the socket 21. This contributes to additional protection against drilling dust.

In 4 the socket 21 is double-walled and shown in section. The three suction openings 211 are each connected to a separate suction channel 212, which leads an air flow to the opposite end section 214 of the socket 21.

Inside, the bushing 21 includes three guide strips 215 to guide or axially hold the drilling tool.

In 5 a flange section 22 is shown, which includes an air supply connection 221. Air supply connection 221 is designed to be throttleable.

In 6 the flange section 22 can be seen in a sectional view.

The air supply port 221 is connected to an air supply channel 222. The flange section 22 has exits at the front and rear ends. In addition, the distribution of the airflow from front to back can be controlled via another throttle.

The air supply channel 222 includes a first outlet 223 in the area of the suction opening 211 on the end face of the socket arranged in the flange section ( 1 , Ref. 22).

The air supply channel 222 includes a second outlet 224 at the end section, which is the end face with the suction opening 211 in the flange section arranged socket ( 1 , Ref. 22).

In 7 The suction unit is shown in the assembled state with the representation of the two air flows.

The air supply connection 221 has an air supply channel 222 with a first outlet 223. The air emerging there is discharged through the suction opening 211.

The extracted drilling dust is thus directed into the adapter section 23 and sucked out via the suction connection 231 there.

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102020130445 A1 [0004]

Claims (9)

Drilling device (1) with a suction unit (2), which drilling device (1) comprises a drilling tool (3) which is guided radially and axially in a bushing (21) of the suction unit (2), the suction unit (2) having a drive unit (4) connectable adapter section (23) and a flange section (22), the socket (21) being rotatably mounted in the flange section (22), the socket (21) comprising at least one suction opening (211) on one end face, through which an air flow can be directed via a suction channel (212) to a suction connection (231) arranged on the adapter section (23). Drilling device (1). Claim 1 , wherein the socket (21) comprises three suction openings (211) on one end face. Drilling device (1). Claim 2 , wherein the socket (21) is double-walled and the three suction openings (211) lead an air flow to the opposite end section (214) of the socket (21) via a suction channel (212) guided inside the wall. Drilling device (1) according to one of the preceding claims, wherein the bushing (21) comprises guide strips (215). Drilling device (1) according to one of the preceding claims, wherein the bushing (21) comprises air guide elements (216) on the front side. Drilling device (1) according to one of the preceding claims, wherein the flange section (22) comprises an air supply connection (221). Drilling device (1). Claim 6 , wherein the air supply connection (221) is connected to an air supply channel (222), and wherein the air supply channel (222) comprises a first outlet (223) in the area of the suction opening (211) on the end face of the socket (22) arranged in the flange section. Drilling device (1). Claim 6 , wherein the air supply connection (221) is connected to an air supply channel (222), and wherein the air supply channel (222) comprises a second outlet (224) at the end section, which is the end face with the suction opening (211) of the socket (22) arranged in the flange section. is opposite. Drilling device (1) according to one of the Claims 6 until 8th , wherein the air supply connection (221) is designed to provide a variable amount of air.

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