TW202228900A - Collet type cutter structure - Google Patents

Abstract

The invention discloses a collet chuck type cutter structure which comprises a step rod and a buckling rod, the step rod comprises a first rod body and a second rod body, the first rod body is provided with a first channel used for installing a cutter rod, the second rod body is provided with a conical structure matched with an inner conical hole of a cutter main shaft, a threaded hole is formed in the second rod body, and the buckling rod is connected with the threaded hole. The upper portion of the buckling rod is provided with a buckling groove matched with a tool retracting buckling claw in a tool spindle, and the buckling rod is provided with an external thread matched with the threaded hole. And a second channel is arranged in the buckling rod. And a water stop screw is arranged on the buckling rod and is arranged at the lower end of the second channel. And a groove part convenient for a wrench tool to operate is arranged on the step rod. The collet chuck type tool is simple in structure and convenient to operate, and can be matched with an ATC tool magazine of a CNC machine tool to achieve the purposes of metal cutting machining and automatic tool changing without using a tool handle, so that the working efficiency of metal machining is improved.

Description

Collet type tool structure with automatic tool change function and automatic tool change method

The present invention relates to the field of spare parts for machine tools, in particular to the field of collet type tools that can provide automatic tool changing functions.

Press, the full name of CNC is Computer Numeric Control, which is "computer numerical control", and the CNC machining center (MACHINE CENTER) is a CNC machine tool controlled by computer numerical value; , According to the instructions of the computer program, the required material workpiece is cut into the required shape.

Usually, a CNC machining center is equipped with an ATC tool magazine (Automatic Tool Changer, ATC for short) next to its tool spindle 7, as disclosed in No. M481784 "CNC machining machine tool changer", wherein the tool magazine will Equipped with a variety of face milling cutters, end mills, large and small drill bits, etc., and an automatic tool changer 8 between the tool magazine and the tool spindle 7, as shown in Figures 9 and 10 wherein, the automatic tool changing device 8 is connected by a driving device 82 and drives a tool changing claw 81, and the two ends of the tool changing claw 81 are respectively set as a tool-receiving end 811, and the two tool-receiving ends The 811 grabs the tool magazine and the tool 9 of the tool spindle 7 respectively, and then rotates 180 degrees to replace and exchange each other;

In addition, before the tool 9 rotates 180 degrees to automatically change the tool, the tool spindle 7 will perform a tool retracting action; The mechanism is provided with a buckle claw 71 inside the tool spindle 7, and corresponding to the buckle claw 71, a buckle end 921 is provided at the rear end of the tool handle 92. If the buckle claw 71 tightly locks the buckle of the tool handle 92 When the end 921 is connected and is pulled upward due to the tension spring, the push-pulling surface between the tool handle 92 and the tool spindle 7 forms a tight connection, so as to facilitate the joint rotation of the tool spindle 7 and the tool handle 92 and cutting the workpiece; if the clasps 71 tightly fasten the clasps 921 of the tool handle 92 and push down and retract the tool, it will loosen the connection between the tool handle 92 and the inner taper hole 72 of the tool spindle 7 The push-pull surface is convenient for the tool changing claw 81 to take off the tool 9 .

In addition, as shown in FIG. 11, it is a collet type tool 9a, and the collet type tool 9a is set as a collet 10 installed at the front end of a handle 92a, and then a nut cover 93 is used to force Tighten the collet 10 to clamp one end milling cutter or drill bit (ie, the tool shank 91). However, the collet type tool 9a cannot be used for the automatic feeding and retracting of the tool spindle 7, so that the collet type tool 9a is also The automatic tool change of the ATC tool magazine cannot be applied to the CNC machine tool, and the tool must be changed manually, which is quite inefficient.

Although there is also a collet type tool 9b that does not use the nut cover 93, as shown in FIG. 12, the collet type tool 9b uses a screw 94 and a spacer 95 to align a collet 10b (wherein The collet 10b is a heat-shrinkable collet) to be tightened and combined with its shank 92, except that the collet 10b and a tool shank 91 must be locked by manual operation, so that the collet type tool 9b cannot be The automatic tool feeding and retracting applied to the tool spindle 7, that is, the collet type tool 9b cannot be applied to the automatic tool changing of the ATC tool magazine of the CNC machine tool.

For this reason, in view of the problems existing in the conventional collet-type tool 9a and the collet-type tool 9b, the inventors have exhausted their efforts to develop the collet-type tool structure with automatic tool changing function of the present invention and the same. Automatic tool changing method, so the main purpose of the present invention is to: provide the collet type tool structure with automatic tool change function; the secondary purpose of the present invention is to provide a kind of collet type tool that does not need to use the precise combination of the tool handle; For the above purpose, the present invention utilizes the following technical means.

Regarding the implementation of the "collet-type tool structure with automatic tool changing function" of the present invention, it includes: a first-level rod body, a hollow first channel and a first channel with two different outer diameters. A first rod body and a second rod body are connected, and the first rod body and the second rod body form a shoulder; wherein the second rod body is set to have the appearance of a tapered body, and is provided with a a first connecting part; and the first rod body is provided with a knife rod; and a buckle rod, a hollow second channel is arranged in the system, and a second connecting part is arranged at one end thereof, and at its The other end is provided with a buckle groove, wherein the second connection part is connected to the first connection part; by connecting the second rod body of the level rod body to the inner taper hole of the tool spindle, it is convenient for the buckle The adaptor is fastened to the claws in the tool spindle to achieve precise positioning and combination with the tool spindle and provide automatic tool change.

The above-mentioned structural embodiment of the present invention further includes a water-stop nut, wherein the water-stop nut is connected to one end of the second channel of the buckle rod.

In the above-mentioned structural embodiment of the present invention, the stage rod body is a heat-shrinkable collet.

In the above-mentioned structural embodiment of the present invention, the stage rod body is provided with at least one water outlet channel.

In the above-mentioned structural embodiment of the present invention, the second rod body is provided with a groove portion, and a hexagonal portion is formed at the bottom of the groove portion.

In the above-mentioned structural embodiment of the present invention, a triangular edge portion is formed between the shoulder portion and the groove portion of the second rod body.

In the above-mentioned structural embodiment of the present invention, the shoulder is formed as an inwardly curved arc angle.

Regarding the "automatic tool changing method of a collet type tool structure with automatic tool changing function" of the present invention, it includes: a first-stage rod body forming step, wherein a rod body is formed with a hollow first channel and has two A first rod body and a second rod body with different outer diameters, and the first rod body and the second rod body are formed with a shoulder, and the second rod body is further formed with the appearance of a tapered body and a a first connecting part; another groove part is formed on the second rod body, and a hexagonal part is formed at the bottom of the groove part, and a hexagonal part is formed between the shoulder part and the groove part of the second rod body There is a triangular edge part; a buckle connecting rod forming step is to form a hollow second channel on the other rod body, and a second connecting part is formed at one end, and a buckle groove is formed at the other end, Wherein the second connecting part is provided to be connected to the first connecting part; and the step of combining the first-stage rod body and the buckle rod is performed by operating the stage rod body, The buckle rod and other two elements are combined; through the above steps, the second rod body of the stage rod body is connected to the inner tapered hole of the tool spindle, so that the buckle rod can be buckled in the tool spindle The claws can be precisely positioned and combined with the tool spindle to provide automatic tool change.

The above-mentioned implementation aspect of the method of the present invention further comprises: an automatic tool changing step, wherein the automatic tool changing step is that when the combined stage rod body and the buckle rod are installed in the tool spindle, a buckle claw will be tightly Buckle the buckle groove of the buckle rod, when the buckle claw pushes the buckle rod downward and retracts the tool, the tool change claw of an automatic tool changer is precisely buckled and fastened to the level of the rod body. The groove part, hexagon part and triangular edge part are then unloaded from the tool spindle to facilitate the automatic tool change program.

First of all, please refer to FIG. 1 to FIG. 7 , the present invention relates to a collet type tool structure with automatic tool change function and an automatic tool change method thereof, which can be mainly provided for automatic tool change between the ATC tool magazine and the tool spindle. Tool change is used to improve the working efficiency of metal processing. The collet type tool A mainly provides a self-contained tool without being connected to the tool holder, but is directly installed in the ATC tool magazine, which includes: a first-class rod body 1 , a snap connecting rod 2 or/and a water stop nut 3 and other components, the aforementioned components are described in detail with reference to the drawings as follows.

The said stage rod body 1 is mainly to install a knife rod 91, which is provided with a hollow first channel 10 and has a first rod body 11 and a second rod body 12 with two different outer diameters. The first rod body 11 and the second rod body 12 are integrally formed to form a shoulder portion 13, and the shoulder portion 13 is usually set as an inward curved arc angle; wherein the second rod body 12 is set to have a taper The appearance of the shaped body is provided with a first connecting portion 121 , and the first connecting portion 121 is preferably in the form of an internal thread, and the first rod body 11 is provided for attaching the cutter rod 91 .

Further, the first-stage rod body 1 is preferably set as a heat-shrinkable collet and is provided with at least one water outlet channel to facilitate the supply of cooling fluid during workpiece cutting; in addition, the second rod body 12 is provided with a groove A hexagonal part 123 is formed at the bottom of the groove part 122, wherein the hexagonal part 123 can be inserted into the stage rod body 1, the buckle rod 2 and other components by hand tool operation. A triangular edge portion 124 is formed between the shoulder portion 13 and the groove portion 122 of the second rod body 12, which is convenient for triangular positioning and fixing with a jig. The two elements such as the rod body 1 and the buckle rod 2 are screwed and locked; in addition, the shape of the tool-receiving end 811 of the tool-changing claw 81 of the automatic tool-changing device 8 is set to match the level of the rod body 1. The groove portion 122, the hexagonal portion 123, and the triangular edge portion 124 of the automatic tool changing device 8, so that the tool removal end 811 of the tool changing claw 81 of the automatic tool changing device 8 is sleeved in the groove portion 122 and the hexagonal portion 123 of the level rod body 1. , Triangular edge portion 124 to facilitate precise positioning, as well as tool removal and tool change.

The buckle rod 2 is mainly provided with a buckle claws 71 located in the tool spindle 7 to facilitate automatic tool retraction in the tool spindle of the machine tool, wherein the buckle rod 2 is provided with A hollow second channel 20 is provided with a second connecting portion 22 at one end and a snap groove 21 at the other end, wherein the second connecting portion 22 is preferably set as an external thread and is connected The first connecting portion 121 is provided on the level rod body 1 .

The water-stop nut 3, wherein the water-stop nut 3 is connected to one end of the second channel 20 of the buckle rod 2, is used for sealing the cooling liquid outlet.

Therefore, the structure of the present invention mainly provides a better solution of the collet type tool structure for automatic tool change. After screwing and locking the two components such as the stage rod body 1 and the buckle rod 2 by means of hand tool operation or triangular positioning and fixing with a jig, the second rod body of the stage rod body 1 is then screwed together. 12 is connected to the inner taper hole 72 of the tool spindle 7, so that the buckle rod 2 can be buckled with the buckle claws 71 located in the tool spindle 7, so that the collet type tool A can become a tool without using a tool holder, and It is directly provided to the ATC tool magazine of the machine tool for metal cutting processing and automatic tool change.

6 and 7, it is a state in which the collet type tool A of the present invention is implemented in the ATC tool magazine of the machine tool for metal cutting and automatic tool change; when the collet type tool A of the present invention is installed When in the tool spindle, a snap claw 71 provided inside the tool spindle 7 will tightly fasten the snap groove 21 of the snap lever 2 and will be pulled upward due to the tension spring, allowing the level lever to be pulled upward. The second rod body 12 of the body 1 and the inner taper hole 72 of the tool spindle 7 form a close contact with the push-pull surface, so that the collet type tool A and the tool spindle 7 can rotate together with the tool spindle 7 and perform workpiece cutting; When the claw 71 pushes the collet type tool A downward and retracts the tool, it will release the second rod body 12 of the rod body 1 of the stage and the inner taper hole 71 of the tool spindle 7, so as to facilitate the automatic tool changer The tool changing claw 81 of 8 is precisely buckled and fastened to the groove part 122, the hexagonal part 123 and the triangular edge part 124 of the collet type tool A, and then the collet type tool A is removed to facilitate automatic tool change. program.

Summarize the aforesaid collet type cutter A of the present invention, as shown in Figure 5 to Figure 8, can obtain the automatic tool changing method B of the collet type cutter of the present invention, the system comprises: a first-stage rod body forming step a, is a rod The body is formed with a hollow first channel 10 and has a first rod body 11 and a second rod body 12 with two different outer diameters, and the first rod body 11 and the second rod body 12 are formed with a shoulder part 13, and the second rod body 11 is further formed with the appearance of a tapered body and a first connecting part 121; in addition, a groove part 122 is formed in the second rod body 12, and the bottom of the groove part 122 is A hexagonal portion 123 is formed, and a triangular edge portion 124 is formed between the shoulder portion 13 and the groove portion 122 of the second rod body 12 .

The automatic tool changing method B of the collet type tool of the present invention further comprises: a snap-on rod forming step b, in which the other rod body is formed with a hollow second channel 20, and a second channel 20 is formed at one end thereof. The connecting portion 22 is formed with a buckle groove 21 at the other end, wherein the second connecting portion 22 is provided to be connected to the first connecting portion 121; The two components, such as the stage rod body 1 and the buckle rod 2, are combined by hand tool operation or triangular positioning and fixing by a jig.

The automatic tool changing method B of the collet type tool of the present invention further comprises: an automatic tool changing step d, when the combined stage rod body 1 and the buckle rod 2 are installed in the tool spindle 7, a buckle claw 71 It will tightly fasten the buckle groove 21 of the buckle rod 2. When the buckle claw 71 pushes the buckle rod 2 downward and retracts the tool, the tool change claw 81 of the automatic tool changer The knife end 811 is precisely snapped into and engaged with the groove portion 122 , the hexagonal portion 123 and the triangular side portion 124 of the rod body 1 of the stage, and then released, so as to facilitate the automatic tool changing procedure.

Therefore, the method of the present invention mainly provides a better solution for applying the collet-type tool A to automatic tool changing, which mainly uses the above steps to connect the second rod body 12 of the stage rod body 1 to the inside of the tool spindle 7 The taper hole 72 allows the snap rod 2 to be snapped to the snap claws 71 in the tool spindle 7, thereby achieving the purpose of precisely combining the collet tool A with the tool spindle 7 and providing automatic tool change.

To sum up, the present invention relates to a "collet type tool structure with automatic tool change function and automatic tool change method", and its structure and method steps have not been found in books or publicly used, which is in line with the patent application. For the requirements, I implore the Jun Bureau Mingjian to grant the patent as soon as possible, and I am most grateful;

What needs to be stated, the above are the specific embodiments of the patent application and the technical principles used. If the changes are made according to the concept of the patent application, the functions produced by them will not exceed the description and drawings. The spirit covered shall be stated within the scope of this patent application.

A: Collet type tool B: Automatic tool change method for collet type tools a, b, c, d: steps 1: Class rod body 10: The first channel 11: The first rod body 12: Second rod body 121: The First Link 122: groove part 123: Hexagon 124: Triangle edge 13: Shoulder 131: Inward curved arc angle 2: Buckle rod 20: Second channel 21: Buckle slot 22: Second Link 3: Waterstop nut 7: Tool spindle 71: Claws 72: Inner taper hole 8: Automatic tool changer 81: Change the claws 811: knife end 82: Drive 9: Knives 9a: Collet type tools 9b: Collet type tool 91: Toolholder 92: Handle 921: Snap terminal 93: Screw cap 94: Screw 95: Spacer 10: Collet 10b: Collet

Figure 1: is a perspective exploded view of the collet structure of the present invention. Fig. 2: is the combined drawing of the collet structure of the present invention. Fig. 3: is the a-a direction view of Fig. 2 of the present invention. Fig. 4: It is the b-b direction view of Fig. 2 of the present invention. Figure 5: is a sectional view of the collet type tool structure with automatic tool changing function of the present invention. FIG. 6 is a schematic diagram of the tool installation state of the collet type tool structure with automatic tool change function implemented in the automatic tool change of the present invention. FIG. 7 is a view showing the unloading state of the collet type tool structure with automatic tool changing function implemented in the automatic tool changing according to the present invention. Fig. 8: It is the flow chart of the steps of the automatic tool changing method of the collet type tool of the present invention. Figure 9: is a schematic diagram of a general automatic tool changer. Figure 10: It is a schematic diagram of the general tool spindle automatically feeding or retracting the tool. FIG. 11 is a schematic cross-sectional view of a conventional collet type tool structure with automatic tool change function. FIG. 12 is a schematic cross-sectional view of a conventional collet type tool structure with automatic tool change function.

A: Collet type tool

1: Class rod body

10: The first channel

11: The first rod body

12: Second rod body

121: The First Link

122: groove part

123: Hexagon

124: Triangle edge

131: Inward curved arc angle

2: Buckle rod

20: Second channel

21: Buckle slot

22: Second Link

3: Waterstop nut

7: Tool spindle

71: Claws

72: Inner taper hole

91: Toolholder

Claims (9)

A collet type tool structure with automatic tool change function, which includes: A first-stage rod body is formed by connecting a first rod body and a second rod body with a hollow first channel and two different outer diameters inside, and the first rod body and the second rod body are connected. The rod body forms a shoulder; wherein the second rod body is configured to have the appearance of a tapered body, and is provided with a first connecting part; and the first rod body is provided with a knife rod; and A buckle rod is provided with a hollow second channel, and a second connection part is formed at one end and a buckle groove is formed at the other end, wherein the second connection part is connected to the first connection part. a link; By connecting the second rod body of the level rod body in the inner taper hole of the tool spindle, it is convenient for the buckle rod to be buckled with the buckle claw in the tool spindle, so as to achieve precise positioning and combination with the tool spindle and provide The purpose of automatic tool change. The collet-type tool structure with automatic tool changing function according to claim 1 further comprises a water-stop nut, wherein the water-stop nut is connected to one end of the second channel of the buckle rod. The collet-type tool structure with automatic tool-changing function according to claim 1 or 2, wherein the stage rod body is set as a heat-shrinkable collet. The collet-type tool structure with automatic tool changing function according to claim 3, wherein the stage rod body is provided with at least one water outlet channel. The collet type tool structure with automatic tool changing function according to claim 1 or 2, wherein the second rod body is provided with a groove portion, and the bottom of the groove portion is formed with a hexagonal portion. The collet-type tool structure with automatic tool changing function according to claim 1 or 2, wherein a triangular edge portion is formed between the shoulder portion and the groove portion of the second rod body. The collet-type tool structure with automatic tool change function as claimed in claim 1 or 2, wherein the shoulder is formed as an inwardly curved arc angle. An automatic tool changing method of a collet type tool structure with automatic tool changing function, comprising: The first-stage rod body forming step is to form a rod body with a hollow first channel and a first rod body and a second rod body with two different outer diameters, and the first rod body and the first rod body The two rod bodies are formed with a shoulder, and the second rod body is further formed to have the appearance of a tapered body and a first connecting portion; and a groove portion is formed on the second rod body, and the bottom of the groove portion is A hexagonal portion is formed, and a triangular edge portion is formed between the shoulder portion and the groove portion of the second rod body; In a step of forming a buckle rod, the other rod body is formed with a hollow second channel, and a second connecting portion is formed at one end and a buckle groove is formed at the other end, wherein the second connecting portion is formed. part is provided for connection to the first connecting part; The step of combining the first-stage rod body and the buckle rod is to combine the two elements, such as the first-stage rod body and the buckle rod, by operating with a hand tool or by using a jig to perform triangular positioning and fixing; and An automatic tool changing step is to automatically install the combined stage rod body and the buckle rod on the tool spindle, and a buckle claw set inside it will tightly buckle the buckle groove of the buckle rod; Through the above steps, the second rod body of the stage rod body is connected to the inner tapered hole of the tool spindle, so that the buckle rod can be buckled with the buckle claw in the tool spindle, so as to achieve precise positioning and combination with the tool spindle And provide the purpose of automatic tool change. The automatic tool changing method of the collet type tool structure with automatic tool changing function according to claim 8, wherein in the automatic tool changing step, when the buckle claw pushes the buckle rod downward and retracts the tool, The tool changing claw of an automatic tool changing device is precisely buckled and fastened to the groove part, hexagonal part and triangular edge part of the rod body of this stage, and then released, so as to facilitate the automatic tool changing process.

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