TWI761038B - Collet type tool structure with automatic tool change function and automatic tool change method - Google Patents

Abstract

The invention relates to a collet type tool structure with automatic tool changing function and an automatic tool changing method, comprising: a first-stage rod body, a first rod body and a second rod body with two different outer diameters Connected, wherein the second rod body is set to have a taper and is provided with a first connecting part; and the first rod body is provided with a knife rod; The connecting part is provided with a buckle groove at the other end, wherein the second connecting part is connected to the first connecting part; by connecting the second rod body of the stage rod body to the inner taper hole of the tool spindle , so that the buckle rod is buckled with the buckle claw in the tool spindle, so as to achieve the purpose of precise positioning and combination with the tool spindle and provide automatic tool change.

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 changing device 8 between the tool magazine and the tool spindle 7, as shown in Figure 9 and Figure 10 The one shown; 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-taking end 811, and the two The tool end 811 grabs the tool magazine and the tool 9 of the tool spindle 7 respectively, and then rotates 180 degrees to replace 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 terminal 921 and will stretch due to When the spring is pulled upward, the push-pulling surface between the tool holder 92 and the tool spindle 7 forms a tight engagement, so that the tool spindle 7 and the tool holder 92 can rotate together and cut the workpiece; if the buckle When the claw 71 is tightly clasping the buckling end 921 of the tool handle 92 and pushes it downward to retract the tool, the tool handle 92 and the push-pull surface of the inner taper hole 72 of the tool spindle 7 will be released, so as to facilitate the replacement of the tool. The knife jaws 81 take the knife 9 away.

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. The main purpose of the present invention is to provide a collet-type tool structure with automatic tool-changing function; the secondary purpose of the present invention is to provide a precision-combined collet-type tool without using a tool holder; 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-stage rod body, which is integrally formed and has a hollow first channel inside and has two different outer A first rod body and a second rod body of a diameter 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 a first connecting part is provided; 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 connecting part is provided at one end thereof, The other end is provided with a buckle groove, wherein the second connecting part is connected to the first connecting part; Let the buckle rod be buckled with the buckle claw in the tool spindle, so as to achieve the purpose of precise positioning and combination with the tool spindle and provide automatic tool change; moreover, because the structure of the present invention does not use the tool handle structure, a tool handle can be omitted. The structure, in addition to reducing the weight, can also save and reduce the overall use cost of the CNC machine tool tool and the cost of its manual assembly and 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 first rod body of 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 collet type tool structure with automatic tool changing function" of the present invention, it includes: a first-stage rod body forming step, which is to form a rod body with a hollow first channel And has a first rod body and a second rod body with two 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 a tapered body. Appearance and 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 on the bottom of the groove part, and a groove part is formed between the shoulder part and the groove part of the second rod body A triangular edge is formed between them; 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 is formed at the other end. a connecting groove, wherein the second connecting part is provided to be connected to the first connecting part; and the first step of combining the rod body with the buckle rod is by operating the step with a hand tool or by performing triangular positioning and fixing with a jig. The two elements, such as the rod body and the buckle rod, are combined; through the above steps, the second rod body of the stage rod body is connected to the inner taper hole of the tool spindle, so that the buckle rod can be buckled to the inner taper hole of the tool spindle. The claws in the tool spindle can be precisely positioned and combined with the tool spindle to provide automatic tool change; moreover, because the method of the present invention does not use a tool handle structure, a tool handle structure can be omitted, in addition to reducing the weight, It can also save and reduce the overall use cost of the CNC machine tool tool and the cost of its manual assembly and tool change.

The above-mentioned embodiment of the method of the present invention further includes: an automatic tool changing step, wherein when the automatic tool changing step is to install the combined stage rod body and the buckle rod 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.

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

92a: 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.

Figure 2: It is a combination diagram of the collet structure of the present invention.

Fig. 3 is a view from the direction a-a of Fig. 2 of the present invention.

FIG. 4 is a view from the b-b direction of FIG. 2 of the present invention.

FIG. 5 is a cross-sectional view of the structure of the collet type tool with automatic tool changing function of the present invention.

FIG. 6 is a diagram showing the state of the tool installation of the collet type tool structure with automatic tool change function of the present invention implemented in the automatic tool change.

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 is a flow chart showing the steps of the automatic tool changing method of the collet type tool of the present invention.

Figure 9: It 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.

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 body, and it is equipped with a first The first connecting portion 121 is preferably in the form of an internal thread, and the first rod body 11 is provided for connecting the cutter shank 91 .

Further, the first rod body of the stage rod body 1 is preferably set as a heat-shrinkable collet and is provided with at least one water outlet channel, so as to facilitate the supply of cooling liquid during workpiece cutting; in addition, the second rod body 12 is provided with a groove part 122, and the bottom of the groove part 122 is formed with a hexagonal part 123, wherein the hexagonal part 123 can be inserted into the rod body 1 and the buckle by hand tool operation. The two elements such as the rod 2 are screwed together; and a triangular edge 124 is formed between the shoulder 13 and the groove 122 of the second rod body 12, which is convenient for triangular positioning and fixing with a jig. , in order to screw and lock the two components such as the rod body 1, the buckle rod 2, etc.; in addition, the shape of the tool-taking end 811 of the tool-changing claw 81 of the automatic tool-changing device 8 is set to fit The groove part 122 , the hexagonal part 123 , and the triangular edge part 124 of the stage rod body 1 are used to facilitate the tool-receiving end 811 of the tool changing claw 81 of the automatic tool changing device 8 to be inserted into the groove part of the stage rod body 1 . 122, the hexagonal part 123, and the triangular edge part 124 are used for precise positioning, as well as taking out and changing tools.

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. The level rod body 1, the buckle rod 2, etc. are two After the components are screwed together, the second rod body 12 of the stage rod body 1 is then connected to the inner taper hole 72 of the tool spindle 7, so that the buckle rod 2 can be buckled in the tool spindle 7. The claws 71 are used to achieve the purpose that the collet type tool A does not need to use a tool handle to become a tool, and is directly provided in the ATC tool magazine of the machine tool for metal cutting processing and automatic tool change; By using the tool handle 92 structure, one tool handle 92 structure can be omitted, in addition to reducing the weight, it can also save and reduce the overall use cost of the CNC machine tool tool and the cost of manual assembly and 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.

Summarizing the aforementioned collet type tool A of the present invention, as shown in FIGS. 5 to 8 , an automatic tool changing method B for a collet type tool of the present invention can be obtained. 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-connecting rod forming step b, which is to form a hollow second channel 20 on the other rod body, 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 is used to allow the buckle rod 2 to be buckled with the buckle claws 71 in the tool spindle 7, so as to achieve the purpose of precisely combining the collet type tool A with the tool spindle 7 and providing automatic tool change; The method of the present invention does not use the shank 92 structure, and can omit one shank 92 structure. In addition to reducing the weight, it can also save and reduce the overall use cost of the CNC machine tool tool and the cost of manual assembly and 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

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 (6)

A collet type tool structure with automatic tool changing function comprises: a first-stage rod body, which is integrally formed and has a hollow first channel inside and a first rod body with two different outer diameters; A second rod body is connected, and the first rod body and the second rod body form a shoulder, and the first rod body is a heat-shrinkable collet, and the second rod body is provided with a a groove part, and a hexagonal part is formed at the bottom of the groove part; wherein the second rod body is set to have the appearance of a tapered body, and is provided with a first connecting part; and the first rod body is provided for connecting A cutter bar; and a buckle connecting rod, which is provided with a hollow second channel, and a second connecting portion is arranged at one end thereof, and a buckle connecting groove is arranged at the other end thereof, wherein the second connecting portion is connected to the Set on the first connecting part; by connecting the second rod body of the stage rod body in the inner taper 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 The precise positioning is combined with the tool spindle and provides automatic tool change without the need to use common collets and nut covers. In addition to reducing the weight of the tool holder, it can also reduce the overall use cost of CNC machine tools. 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 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 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 first rod body is set as a heat shrinkable collet, and the second rod body is further formed to have the appearance of a tapered body and a first connecting portion; A groove part is formed, and a hexagonal part is formed at the bottom of the groove part, and a triangular edge part is formed between the shoulder part and the groove part of the second rod body; a buckle rod forming step, 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 provides connection to the first connecting portion. The 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. When pushing the latching lever downwards and withdrawing the tool, the tool changing claw of an automatic tool changing device is precisely buckled and fastened to the groove, hexagonal and triangular sides of the lever body and then released, so as to facilitate the It is convenient to carry out the automatic tool change program; through the above steps, the second rod body of the stage rod body is connected to the inner taper hole of the tool spindle, so that the buckle rod can be buckled with the buckle claw in the tool spindle, so as to To achieve the purpose of combining precise positioning with the tool spindle and providing automatic tool change, there is no need to use common collets and nut covers. In addition to reducing the weight of the tool holder, it can also reduce the overall use cost of CNC machine tools.

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