TW201309413A - Device and method for fixing objects on a multi-axis machine tool - Google Patents

Abstract

The device and method for fixing objects on a multi-axis machine tool of the present invention utilizes a set of orientation columns passing through a set of holes which is pre-set on a workpiece, and utilizes a set of bolts lock in the orientation columns for fixing the workpiece. Comparing to the prior art, the present invention utilizes the holes pre-set on the workpiece and the orientation columns to be precise match, makes the workpiece be fixed precisely in the same position no matter how much times the workpiece be fixed, further increases the repetitiveness of fixing and reduces the time of correcting, and moreover, prevents the deformation or inclination of the workpiece generated by clamping. Accordingly, the device and method for fixing objects on a multi-axis machine tool of the present invention is capable of playing more precision and fast advantages of multi-axis machine tool.

Description

Clamping device and fixing method in multi-axis machine tool

The invention relates to a clamping device and a fixing method, in particular to a precise and fast clamping device and fixing method on a multi-axis machine tool.

As technology continues to advance, the technology of machining is becoming more mature. Today's machining has become more sophisticated, faster and less expensive than in the past. Therefore, many articles that have been traditionally manufactured by hand are gradually being manufactured by means of machining, and the application of multi-axis machines is becoming more and more widespread. Today, even dental models for dental implant surgery can be processed using multi-axis machines.

During the operation of the implant surgery, the dentist needs to drill several holes in the upper jaw or lower jaw of the patient to implant the implant. Traditional dental implant surgery relies on the experience of the dentist to determine the position and angle of the drill. However, there are often many errors in this way, which can lead to uneven stress distribution of the teeth, and even induce bone loss. The more advanced method is to use computer tomography to create a three-dimensional tooth model in the computer, and calculate the optimal drilling position and angle through computer calculation, and then use the multi-axis processing machine to position and angle the hole. , processed on an introducer. During the operation, the dentist will first place the introducer into the patient's mouth and then drill the hole through the introducer to guide the dentist to drill the patient's upper jaw or lower jaw.

Conventional introducers are generally made of resin. Since the direct clamping guide is easy to cause deformation, the guide is generally fixed on the plaster mold of one tooth, and the plaster mold is clamped through the clamp, and then The introducer is machined using a multi-axis machine.

Conventional clamps use a horizontal clamping method to clamp the plaster mold of the tooth to fix it, but when it is clamped, the surface of the plaster mold may be damaged, and the level of the plaster mold may be tilted due to the clamping force. When the same model is repeatedly clamped by clamping, the problem of repetitiveness is often too low due to the deviation of the clamping position, and the correction procedure required to reduce the deviation of the clamping position is quite time consuming. . To do this, a better fixing method is needed to solve the above problem.

One aspect of the present invention is to provide a clamping device which can improve the repetitiveness of the clamping and reduce the time required for the correction when the workpiece is repeatedly clamped, and can prevent the workpiece from being clamped. Force to deform or tilt.

According to a specific embodiment, the present invention provides a clamping device for securing a workpiece, the workpiece being pre-set with a set of perforations. The clamping device of the present invention comprises a body, a set of positioning posts and a set of bolts. Wherein, the positioning column is disposed on the base body to pass through the perforation of the workpiece. The bolts are used to lock the workpiece to the positioning post to fix the workpiece. The set of positioning columns includes at least two positioning posts for limiting the rotational freedom of the workpiece. The seat body further has a set of seat holes, the seat holes are threaded, and the positioning post is locked to the seat holes to be fixed on the seat body. The positioning post further has an inner bore with a thread in the inner bore for locking the bolt.

Another aspect of the present invention is to provide a fixing method which is applied to the above-described holding device. The fixing method of the present invention comprises the steps of: (S1) presetting a set of perforations on the workpiece; (S2) passing the set of positioning posts through the set of perforations of the workpiece; and (S3) locking the set of bolts to The set of positioning posts is to fix the workpiece.

In summary, the clamping device and the fixing method of the present invention are used to fix the movement freedom and the degree of freedom of rotation of the workpiece by using the positioning post to pass through the pre-set perforation of the workpiece and bolting to the positioning post. In turn, the clamping device can achieve the effect of fixing the workpiece. Compared with the prior art, the clamping device and the fixing method of the present invention can precisely fix the workpiece in the same position regardless of the reverse clamping by the precise fitting of the pre-set perforation and the positioning post of the workpiece. The repetitiveness of the clamping is greatly improved and the time required for the correction is reduced, and at the same time, the deformation or tilting of the workpiece during the clamping due to the force is prevented. Therefore, the clamping device and the fixing method of the present invention can more fully utilize the advantages of precision and speed of the multi-axis machining machine when applied to a multi-axis machining machine.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

In order to make the invention more apparent, the following detailed description of the invention and the examples thereof are included to provide a better understanding of the invention.

The description is only for the essential elements of the present invention, and the description and detailed description of the specification are only for explaining one possible example of the present invention. However, the description of the specification should not limit the technical nature of the claimed invention. range. The invention is not limited to specific synthetic methods, ingredients or materials, which may of course vary, unless the invention clearly excludes its possibilities. It should also be understood that the presently described embodiments are merely illustrative of the methods and materials, and any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, the presently described methods and materials.

Referring to FIG. 1, FIG. 1 is a schematic view showing a clamping device according to a preferred embodiment of the present invention. As shown in FIG. 1, the holding device 1 of the present invention is used to fix the workpiece 40, and the workpiece 40 is provided with a set of perforations 42 in advance.

Referring to FIG. 2, FIG. 2 is a perspective view of a clamping device according to a preferred embodiment of the present invention. As shown in FIG. 2, the clamping device 1 of the present invention comprises a body 10, a set of positioning posts 20 and a set of bolts 30. The positioning post 20 is disposed on the base 10 for passing through the through hole 42 of the workpiece 40. The bolt 30 is used to lock the positioning post 20 to fix the workpiece 40. The clamping mechanism of the present invention is detailed below.

Please refer to Figure 1 again. In the embodiment, the workpiece 40 is pre-set with a set of perforations 42. When the clamping device 1 holds the workpiece 40, the workpiece 40 is placed on the base 10, and the positioning post 20 passes through the workpiece. Perforation 42 on 40. Since the positioning post 20 is disposed and fixed to the base 10, the positioning post 20 will limit the horizontal movement freedom of the workpiece 40 relative to the surface of the base 10 as the positioning post 20 passes through the perforations 42 in the workpiece 40. .

It should be noted that when the positioning post 20 is only one, the workpiece 40 will still have a horizontal rotational freedom with respect to the extending direction of the positioning post 20. In order to limit the degree of freedom of rotation of the workpiece 40, in the present embodiment, the positioning post 20 is preferably disposed on the base 10 in a group of two, and the perforations 42 of the workpiece 40 are also two. A set corresponds to the manner in which the positioning post 20 is positioned. In this way, the torque generated by the workpiece 40 due to an external force can be resisted, and the degree of freedom of rotation thereof can be limited. However, in practical applications, the number of the positioning columns and the corresponding number of the perforations of the group are not limited to two, in order to enhance the stability of the fixed workpiece and improve the safety factor of the fixed workpiece, The number of sets of positioning columns and the corresponding number of perforations of the set may also be increased to any number greater than two of three, four, five, and the like.

Moreover, in the present embodiment, the base 10 has a plurality of seating holes 12. The seat hole 12 and the positioning post 20 are corresponding to each other for the positioning post 20 to be disposed and fixed on the base 10. Therefore, in the specific embodiment, the number of the seat holes 12 is also two. However, in practical applications, the number of the seat holes of the group is not limited to two, and the number thereof varies with the number of positioning posts.

In the present embodiment, the seat hole 12 is threaded so that the positioning post 20 can be locked to the seat hole 12 and thus disposed and fixed to the seat body 10. However, in practical applications, the manner in which the positioning post is disposed on the seat body is not limited to the manner of locking the seat hole, and may be disposed on the seat body by other forms having sufficient strength. For example, the seat hole may also be a slot, and the positioning post is fixed to the seat hole in a fitting manner, or the positioning post is integrally formed on the seat body.

Referring to FIG. 1 and FIG. 3, FIG. 3 is a schematic view showing a clamping device for clamping a workpiece according to a preferred embodiment of the present invention. In the present embodiment, when the workpiece 40 is placed on the base 10 and the positioning post 20 passes through the perforations 42 in the workpiece 40, the bolts 30 will lock it to the positioning post 20. As shown in FIG. 1, the positioning post 20 has an inner hole 22 having a thread therein, and the bolt 30 is thereby locked to the inner hole 22 of the positioning post 20, and further clamps the workpiece 40. The clamping device 1 in the state of being clamped and fixed is shown in FIG. 3, at this time, the bolt 30 will resist the workpiece 40, so as to prevent the workpiece 40 from slipping out from the extending direction of the positioning post 20, thereby limiting the workpiece. The degree of vertical movement of 40 relative to the surface of the body 10. At the same time, the horizontal movement degree of the workpiece 40 relative to the surface of the base 10 and the degree of freedom of rotation are restricted by the positioning post 20, so that all the movement degrees of freedom and the degree of freedom of rotation of the workpiece 40 are restricted. The clamping device 1 is brought to the effect of fixing the workpiece 40.

Moreover, in the present embodiment, the number of bolts 30 is also two. However, in practical applications, the number of bolts of the group is not limited to two, and the number thereof varies with the number of positioning posts.

Referring to FIG. 4, FIG. 4 is a perspective view of a cavity according to a preferred embodiment of the present invention. In the present embodiment, the workpiece 40 is a plaster cast and is molded by means of a cavity 50. The cavity 50 has a plurality of forming columns 52 that are identical in size, shape, number, and relative position to one another. When liquid gypsum is poured into the cavity 50 to form the workpiece 40, the forming column 52 will solidify the gypsum around it, thereby causing the formed workpiece 40 to leave a hole corresponding to the forming post 52 and forming a perforation 42. And since the forming column 52 and the positioning post 20 are completely identical in size, shape, number, and relative position to each other, the formed through hole 42 can perfectly correspond to the positioning post 20, and the positioning post 20 passes through the through hole 42. The phenomenon that the clearance fit and the interference fit can be avoided, so that the workpiece 40 can be accurately fixed to the clamping device, and the deformation or tilting of the workpiece 40 due to the force is avoided.

Further, in the present embodiment, in order to make the formed member 40 formed in the cavity 50 easier to demold, the forming post 52 is preferably designed to have a conical shape. Similarly, in order to cooperate with the perforations 42 formed by the forming columns 52, the positioning posts 20 are also preferably designed to be conical.

Please note that in practical applications, the workpiece is not limited to the plaster model, and may be an object of other materials, and the manner in which the workpiece is made is not limited to being performed by means of cavity filling. For example, it is also possible to use a forged metal module and to use a drill press to pre-set a set of perforations in the metal module. Similarly, the shape of the forming column and the positioning post is not limited to a conical shape, and it may also be a cylindrical shape or the like to facilitate the geometry of passing through the perforations.

It is worth mentioning that in the present embodiment, the clamping device of the present invention is applied to a multi-axis machine. However, in practical applications, the clamping device of the present invention can also be applied to other machine tools that need to clamp and fix the workpiece, and is not limited to a multi-axis machine.

Referring to FIG. 5, FIG. 5 is a flow chart showing a method for fixing an object according to a preferred embodiment of the present invention. As shown in FIG. 5, the present invention further provides a method of fixing an object, which is applied to the aforementioned clamping device. The method of the present invention comprises the steps of: (S1) presetting a set of perforations on the workpiece; (S2) passing the set of positioning posts through the set of perforations of the workpiece; and (S3) locking the set of bolts to the A set of positioning posts is used to secure the workpiece. The above steps can be carried out in accordance with the contents of the preceding paragraphs, and thus will not be repeated here.

In summary, the clamping device and the fixing method of the present invention make all the movement freedom of the workpiece by using the positioning post to pass through the pre-set perforation of the workpiece and bolting the workpiece to the positioning post. The degree of freedom of rotation is limited, which in turn allows the clamping device to achieve the effect of fixing the workpiece. Compared with the prior art, the clamping device and the fixing method of the present invention can accurately fix the workpiece in the same position regardless of repeated clamping for several times through the precise matching of the pre-set perforation and the positioning column of the workpiece. The repetitiveness of the clamping is improved and the time required for the correction is reduced, and at the same time, the workpiece can be prevented from being deformed or tilted due to the force during clamping. Therefore, when the clamping device and the fixing method of the present invention are applied to a multi-axis machining machine, the advantages of precision and speed of the multi-axis machining machine can be more fully utilized.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

1. . . Clamping device

10. . . Seat

12. . . Seat hole

20. . . Positioning column

twenty two. . . Bore

30. . . bolt

40. . . Machined parts

42. . . perforation

50. . . Cavity

52. . . Forming column

S1~S3. . . step

1 is a schematic view of a clamping device in accordance with a preferred embodiment of the present invention.

2 is a perspective view of a clamping device in accordance with a preferred embodiment of the present invention.

Figure 3 is a schematic view showing a holding device for holding a workpiece according to a preferred embodiment of the present invention.

Figure 4 is a perspective view showing a cavity according to a preferred embodiment of the present invention.

Figure 5 is a flow chart showing a method of securing an object in accordance with a preferred embodiment of the present invention.

10. . . Seat

12. . . Seat hole

20. . . Positioning column

twenty two. . . Bore

30. . . bolt

40. . . Machined parts

42. . . perforation

Claims (10)

A clamping device for fixing a workpiece, the workpiece is pre-set with a set of perforations, the clamping device comprises: a body; a set of positioning posts disposed on the base for traversing the workpiece The set of perforations; a set of bolts for locking the set of positioning posts to secure the workpiece. The clamping device of claim 1, wherein the set of positioning posts comprises at least two positioning posts for limiting the degree of freedom of rotation of the workpiece. The holding device of claim 1, wherein the seat body has a set of seat holes for fixing the set of positioning posts. The clamping device of claim 3, wherein the set of seat holes has a thread, and the set of positioning posts are locked to the set of seat holes for fixing to the seat body. The clamping device of claim 1, wherein the set of positioning posts each have an inner bore, the inner bore having a thread for locking the bolt. A fixed object method is applied to a clamping device for fixing a workpiece, the clamping device comprising a body, a set of positioning columns and a set of bolts, the set of positioning posts being fixed on the base body, the fixed object method The method comprises the steps of: (S1) presetting a set of perforations on the workpiece; (S2) passing the set of positioning posts through the set of perforations of the workpiece; and (S3) locking the set of bolts to the set of positioning A post to secure the workpiece. The method of claim 6, wherein the set of positioning posts comprises at least two positioning posts to limit the rotational freedom of the workpiece. The method of claim 6, wherein the seat body has a set of seat holes for fixing the set of positioning posts. The method of claim 8, wherein the set of seat holes has a thread, and the set of positioning posts are locked to the set of seat holes to be fixed to the seat. The method of claim 6, wherein the set of positioning posts each have an inner bore having a thread for locking the bolt.