JP5989553B2 - Dental automatic cutting machine - Google Patents

Description

  The present invention is a dental automatic cutting machine capable of cutting with high accuracy, and is capable of preventing idling when a dental cutting block is forgotten to be installed or the like. Related to the machine.

  Generally, dental products such as dental prostheses and denture bases can be produced by casting resin materials by the lost wax casting method, or by building a ceramic material on a refractory model and firing it in a vacuum electric furnace. The manufacturing method and the like are widely known conventionally.

  However, when producing a dental product by such a conventional method, most of the steps are performed manually by a dental technician, and this manual step is very fine and complicated. Therefore, there is a problem that such a process takes a lot of time and labor, and the quality of the dental product produced depends on the skill level of the dental technician.

  Therefore, as a method of producing a lot of stable quality dental products in a short time without relying on the manual work by dental technicians, in recent years, 3D data of dental products is produced using a 3D measuring device or computer, Dental CAD / CAM systems have been developed in which dental cutting blocks are cut by a dental automatic cutting machine based on the three-dimensional data to produce a dental product.

  In a dental automatic cutting machine used in such a dental CAD / CAM system, if three-dimensional data of a dental product is input in advance, the dental cutting block is simply mounted on the dental automatic cutting machine. With this, accurate cutting can be performed.

  However, in general, a dental automatic cutting machine may produce a plurality of dental products from one dental cutting block, and once the dental automatic cutting machine is operated, cutting is performed for a long time. Therefore, if the user forgets to install the dental cutting block and runs idle, the work time is greatly wasted.

  In addition, such an automatic dental cutting machine requires high processing accuracy, so if the dust generated during the cutting process is not quickly sucked, the dust that has entered the space between the dental cutting block and the cutting drill will be significantly reduced. Processing accuracy may be reduced.

  With respect to the problem of dust generated at the time of cutting, a rectangular top plate having an opening through which a cutting drill can be taken in and out, and both side plates connected in a suspended manner from a pair of both side surfaces of the top plate, A cutting portion cover comprising: a cutting duct cover having one end in the longitudinal direction as an opening, a suction duct connected to the other longitudinal end of the cutting section cover, and the suction duct and a dust collector being connected to each other (For example, refer to Patent Document 1).

  If the suction is performed so as to surround the cutting drill in which dust is generated as in this dust collector, the suction can be efficiently performed, and the processing accuracy is not reduced.

  However, if the periphery of the cutting drill is covered with a suction part such as a dust collector in this way, the periphery of the cutting drill will be surrounded. A dust device or the like may collide with other parts in the dental automatic cutting machine and may be damaged greatly, or may cause problems such as a significant decrease in processing accuracy in the subsequent use of the dental automatic cutting machine.

  If you forget to install the dental cutting block, you can prevent idle operation by installing a sensor that detects the presence or absence of the dental cutting block and using the signal detected by this sensor It is conceivable to stop the cutting machine.

  However, in order to detect the presence or absence of a dental cutting block, for example, it is conceivable to project light from the optical sensor onto the dental cutting block and detect the presence or absence of the reflected light. However, such an optical sensor is used. In this case, since the dental cutting block to which the light is projected is likely to be covered with the cutting drill and the surrounding suction portion, it is difficult to reliably detect the presence or absence of the dental cutting block. It is also possible to attach a contact-type sensor to the fixed frame to which the dental cutting block is mounted and fixed, but it is necessary to rotate the fixed frame together when rotating the dental cutting block during cutting. If a contact-type sensor is attached to the fixed frame, wiring or the like may be caught and damaged. Thus, in a dental automatic cutting machine, it is very difficult to provide a sensor for detecting the presence or absence of a dental cutting block.

JP-A-11-216635

  In view of the above problems, the present invention is an automatic dental cutting machine capable of cutting with high accuracy, and in the case where the dental cutting block is forgotten to be installed and the idle operation is performed, It is an object of the present invention to provide an automatic dental cutting machine that can prevent waste and damage to the apparatus.

  As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention installed an automatic dental cutting machine that automatically cuts a dental cutting block from the upper surface side, and fixed the dental cutting block in the locking hole. A fixed frame body for cutting, a cutting drill driving device for rotating a cutting drill by attaching a cutting drill for cutting a dental cutting block to a tip, a holding body for holding and fixing a side portion of the cutting drill driving device, and a holding body A three-dimensional movement device for moving the cover three-dimensionally, a cover body provided with a suction port for sucking dust generated inside, a sliding part for sliding the cover body in the vertical direction with respect to the holding body, and dental Dust generated when cutting a dental cutting block with a cutting drill protruding from the cover body with the lower end of the cover body in contact with the cutting surface of the upper surface of the cutting block from the suction port of the cover body Suck If it is configured with a suction part that discharges to the outside, cutting can be performed while reliably sucking dust, so cutting can be performed with high accuracy, and in the case of forgetting to install a dental cutting block, etc. In order to prevent this, a sensor part for detecting that the lower end of the cover body is located below a predetermined position of the locking hole part of the fixed frame body is provided in the sliding part at the time of cutting, and a detection signal from the sensor part is provided. By providing an automatic control unit that does not drive the cutting drill or stops the cutting drill that is being driven by the three-dimensional movement device, the lower end is placed on the upper surface of the dental cutting block and the holding body that is always placed at an accurate position. Since the sliding part is provided between the cover body that moves up and down depending on the presence or absence of the dental cutting block for contact, and the sensor part is provided in the sliding part, the holding body and the cover The presence or absence of a dental cutting block can be accurately sensed by the positional relationship between and the sensor part is used at the sliding part away from the cutting drill, so the sensor part is not affected by dust, etc. In addition, by providing a sensor part on the sliding part that does not rotate, there is no problem such as entanglement of wiring, and it is possible to reliably detect the presence or absence of a dental cutting block and to operate the dental automatic cutting machine idle. The present invention was completed by investigating that it can be prevented.

That is, the present invention relates to three-dimensional data of a dental product to be manufactured that has been input in advance in a state in which the cutting surfaces on the front and back of the disk-shaped dental cutting block are inverted 180 degrees and the respective cutting surfaces are kept horizontal. An automatic dental cutting machine for automatically cutting a dental cutting block from the upper surface side,
The dental cutting block is mounted and fixed in the engagement hole portion with the front and back cutting surfaces exposed, and a fixed frame body capable of reversing the front and back cutting surfaces of the dental cutting block by 180 degrees;
A cutting drill driving device that attaches a cutting drill for cutting a dental cutting block to the tip and drives the cutting drill to rotate;
A holding body for holding and fixing the side portion of the cutting drill driving device;
A three-dimensional movement device that three-dimensionally moves the holding body;
A cover body having a cylindrical shape smaller in diameter than the dental cutting block and larger in diameter than the cutting drill driving device, and provided with a suction port for sucking dust generated inside when the dental cutting block is cut,
A sliding portion for sliding the cover body in the vertical direction with respect to the holding body;
While the lower end of the cover body is in contact with the cutting surface on the upper surface of the dental cutting block, dust generated when cutting the dental cutting block with a cutting drill protruding from the cover body is sucked into the cover body. It consists of a suction part that sucks from the mouth and discharges it to the outside,
A sensor part for detecting that the lower end of the cover body is located below a predetermined position of the locking hole part of the fixed frame body is provided in the sliding part at the time of cutting, and the cutting drill is detected by a detection signal from the sensor part. An automatic dental cutting machine characterized in that an automatic control unit is provided that stops the cutting drill that is not being driven or that is being driven.

The automatic dental cutting machine according to the present invention is intended to be manufactured in advance in a state where the front and back cutting surfaces of the disk-shaped dental cutting block are inverted by 180 degrees and the respective cutting surfaces are kept horizontal. An automatic dental cutting machine that automatically cuts a dental cutting block from the upper surface side based on the three-dimensional data of the dental product
The dental cutting block is mounted and fixed in the locking hole with the front and back cutting surfaces exposed, and the front and back cutting surfaces of the dental cutting block are reversible by 180 degrees, and the dental cutting block is cut. A cutting drill driving device that attaches a cutting drill to the tip and rotationally drives the cutting drill, a holding body that holds and fixes a side portion of the cutting drill driving device, a three-dimensional movement device that moves the holding body three-dimensionally, and dental A cover body having a cylindrical shape smaller in diameter than the cutting block and larger in diameter than the cutting drill driving device, and provided with a suction port for sucking dust generated inside when the dental cutting block is cut, and a cover With a sliding part that slides the body in the vertical direction with respect to the holding body and a cutting drill that protrudes from the cover body with the lower end of the cover body in contact with the cutting surface of the upper surface of the dental cutting block Cut off Highly accurate because dust generated when cutting a block is sucked from the suction port of the cover body and discharged to the outside. In addition, a sensor part for detecting that the lower end of the cover body is located below a predetermined position of the locking hole part of the fixed frame body at the time of the cutting process is provided on the sliding part. Since there is an automatic control unit that does not drive the cutting drill or stops the cutting drill that is being driven by the detection signal from the holder, the holding body that is always placed at an accurate position by the three-dimensional movement device, and for dental cutting In order to bring the lower end into contact with the upper surface of the block, a sliding part is provided between the cover body that moves up and down depending on the presence or absence of the dental cutting block, and a sensor part is provided in the sliding part. With the positional relationship between the holding body and the cover body, it is possible to accurately detect the presence or absence of dental cutting blocks, and since the sensor part is used at the sliding part away from the cutting drill, the sensor part is dusty etc. The automatic cutting process for dental use by reliably detecting the presence or absence of a dental cutting block, because there is no problem of entanglement of wiring by providing a sensor part on a non-rotating sliding part. It is possible to prevent the machine from idling, and as a result, it is possible to prevent waste of working time and damage to the apparatus due to idling.

1 is a perspective view showing an embodiment of an automatic dental cutting machine according to the present invention. It is a perspective view which shows the state which moved the cover body toward the cutting surface of the upper surface of the dental cutting block with which the dental automatic cutting machine was fixedly mounted. It is a perspective view which shows the state which made the lower end of a cover body contact | abut to the cutting surface of the upper surface of the dental cutting block with which the dental automatic cutting machine was fixedly mounted. It is sectional explanatory drawing which shows the difference by the presence or absence of the block for dental cutting in the dental automatic cutting machine which concerns on this invention.

  Hereinafter, a dental automatic cutting machine according to the present invention will be described in detail with reference to the drawings.

  X is a disk-shaped dental cutting block. In the automatic dental cutting machine according to the present invention, the cutting surfaces Xa and Xa on the front and back sides are inverted 180 degrees so that the respective cutting surfaces Xa and Xa are horizontal. In this state, cutting is automatically performed from the upper surface side based on the pre-input three-dimensional data of the dental product to be manufactured. Y is a cutting drill for cutting the dental cutting block X.

  1, the dental cutting block X is mounted and fixed in the locking hole 1a with the front and back cutting surfaces Xa and Xa exposed, and the front and back cutting surfaces Xa and Xa of the dental cutting block X can be reversed 180 degrees. It is a fixed frame.

  Reference numeral 2 denotes a cutting drill driving device that attaches a cutting drill Y for cutting the dental cutting block X to the tip and drives the cutting drill Y to rotate.

  Reference numeral 3 denotes a holding body for holding and fixing the side portion of the cutting drill driving device 2, and reference numeral 4 denotes a three-dimensional movement device for moving the holding body 3 three-dimensionally.

  5 has a cylindrical shape that is smaller in diameter than the dental cutting block X and larger in diameter than the cutting drill driving device 2, and is provided with a suction port for sucking dust generated inside when the dental cutting block X is machined. It is a cover body.

  Reference numeral 6 denotes a sliding portion that slides the cover body 5 in the vertical direction with respect to the holding body 3. As the sliding portion 6, for example, a guide groove portion having a U-shaped cross section as shown in FIG. For example, a plate member that is slidably engaged with the plate member can be used.

  7 is a state in which the dental cutting block X is cut with a cutting drill Y projecting from the cover body 5 with the lower end 5a of the cover body 5 in contact with the cutting surface Xa of the upper surface of the dental cutting block X. It is a suction part which sucks the dust generated in the suction from the suction port of the cover body 5 and discharges it to the outside.

  Reference numeral 8 denotes a sensor unit for detecting that the lower end 5a of the cover body 5 is positioned below a predetermined position of the locking hole 1a of the fixed frame 1 during cutting, and is provided on the sliding portion 6.

  Reference numeral 9 denotes an automatic control unit that does not drive the cutting drill Y or stops the driving cutting drill Y based on a detection signal from the sensor unit 8.

  In order to produce a dental product such as a denture base or a dental prosthesis by actually using such an automatic dental cutting machine according to the present invention, first, an impression in the oral cavity of the patient is taken, and a plaster model is prepared by a conventional method. Make it. Then, the dental product model to be manufactured is manufactured with wax or the like, and the three-dimensional data is acquired using the CAD system of the dental product model, and transferred to the automatic dental cutting machine according to the present invention. From the viewpoint of improving the efficiency of the cutting work, it is preferable to transfer a plurality of three-dimensional data in advance so that a plurality of dental products can be produced from one dental cutting block X.

  After such a preparation, the dental cutting block X is mounted and fixed in the locking hole 1a of the fixed frame 1 of the automatic dental cutting machine according to the present invention, and transferred in advance. Cutting based on the data is started.

  Specifically, for example, by using a dental cutting block X having a flange around the entire periphery and screwing or the like in a state where the flange is sandwiched, the dental cutting block X is fixed to the locking hole of the fixed frame 1. Firmly fixed to the part 1a.

  At that time, as shown in FIG. 2, the cover body 5 is set in advance so as to be positioned above the cutting surface Xa on the upper surface of the dental cutting block X.

  When cutting is started from this state, the cover body 5 is moved to a predetermined position in the horizontal direction by the three-dimensional moving device 4, and the lower end 5a of the cover body 5 is in contact with the cutting surface Xa on the upper surface of the dental cutting block X. Move in the vertical direction.

  At that time, as shown in FIG. 4, the cover body 5 is slidably attached to the sliding portion 6, and the cover body 5 is suspended by its own weight. When the dental cutting block X is forgotten to be mounted as shown in FIG. 4 (II), the cover body 5 is completely suspended until it comes into contact with a stopper portion (not shown) of the sliding portion 6. However, when the dental cutting block X is mounted as shown in FIG. 4 (I), it is not completely suspended.

  Therefore, in the automatic dental cutting machine according to the present invention, in order to detect a case where the dental cutting block X is not mounted, for example, as shown in each diagram of FIG. 4, the light of the optical sensor and the optical sensor pass through. A sensor portion 8 including a light hole portion is provided on the sliding portion 6.

  When the dental cutting block X is not mounted as shown in FIG. 4 (II), the light of the optical sensor does not pass through the light hole and is not reflected, so that the dental cutting block X is not mounted. When the dental cutting block X is mounted as shown in FIG. 4 (I), the dental cutting block X is mounted by receiving the reflected light of the light from the optical sensor. The cutting work is performed automatically.

  As described above, the sensor unit 8 that detects that the lower end 5a of the cover body 5 is positioned below a predetermined position of the locking hole 1a of the fixed frame 1 is provided on the sliding portion 6 during the cutting process. The automatic control unit 9 that does not drive the cutting drill Y or stops the cutting drill Y being driven by a detection signal from the sensor unit 8 is provided, so that depending on the positional relationship between the holding body 3 and the cover body 5 The presence or absence of the cutting block X can be accurately detected, and the sensor unit 8 is used at the sliding unit 6 away from the cutting drill Y. Therefore, the sensor unit 8 is not affected by dust or the like, Also, since the sensor unit 8 is provided on the non-rotating sliding unit 6 so as not to cause problems such as winding of wiring, the dental automatic cutting machine is idly operated by reliably detecting the presence or absence of the dental cutting block X. To prevent As a result, it is possible to prevent waste of working time and damage to the device due to idle operation.

X Dental cutting block
Xa Cutting surface Y Cutting drill 1 Fixed frame
1a Locking hole 2 Cutting drill driving device 3 Holding body 4 Three-dimensional moving device 5 Cover body
5a Lower end 6 Sliding part 7 Suction part 8 Sensor part 9 Automatic control part

Claims (1)

Let's make a pre-input with the cutting surfaces (Xa, Xa) of the front and back of the disk-shaped dental cutting block (X) inverted 180 degrees and keeping the respective cutting surfaces (Xa, Xa) horizontal. An automatic dental cutting machine that automatically cuts the dental cutting block (X) from the upper surface side based on the three-dimensional data of the dental product,
The dental cutting block (X) is mounted and fixed to the locking hole (1a) with the front and back cutting surfaces (Xa, Xa) exposed, and the front and back cutting surfaces of the dental cutting block (X) ( Xa, Xa) a fixed frame body (1) that can be reversed 180 degrees;
A cutting drill drive device (2) for attaching a cutting drill (Y) for cutting the dental cutting block (X) to the tip and driving the cutting drill (Y) to rotate;
A holding body (3) for holding and fixing the side portion of the cutting drill driving device (2);
A three-dimensional movement device (4) for three-dimensionally moving the holding body (3);
The dental cutting block (X) has a smaller diameter and a larger diameter than the cutting drill drive device (2), and sucks dust generated inside when the dental cutting block (X) is cut. A cover body (5) provided with a suction port to perform,
A sliding portion (6) for sliding the cover body (5) in the vertical direction with respect to the holding body (3);
The cutting drill protruded from the cover body (5) in a state where the lower end (5a) of the cover body (5) is in contact with the cutting surface (Xa) on the upper surface of the dental cutting block (X). (Y) comprises a suction part (7) for sucking dust generated when cutting the dental cutting block (X) from the suction port of the cover body (5) and discharging it to the outside. And
A sensor portion (8) for detecting that the lower end (5a) of the cover body (5) is located below a predetermined position of the locking hole portion (1a) of the fixed frame body (1) during the cutting process. An automatic control unit (9) that is provided in the moving unit (6) and that does not drive the cutting drill (Y) or stops the driving cutting drill (Y) according to a sensing signal from the sensor unit (8). A dental automatic cutting machine characterized in that is provided.

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