Heat shrinkable collet

Abstract

The utility model discloses a kind of heat shrink novel collets, it is related to tool processing technical field, including rear end cylinder and front end cylinder, integrated fixed setting between rear end cylinder and front end cylinder, the inside of rear end cylinder is provided with threaded hole, the inside of front end cylinder is provided with clamping through-hole, threaded hole is communicated between clamping through-hole. The utility model provides a kind of heat shrink novel collets, by the structure cooperation design of whole, so that it can utilize thermal expansion and contraction principle to tool is clamped, realize need not to be grooved, and utilize its slotless design so that it changes the elastic clamping mode of traditional collet fundamentally, greatly improve the roundness of collet inner hole and outer circle, concentricity;In clamping aspect, the contact stress area when clamping is increased;When using in the high-speed rotation scene above 10,000 revolutions, the wind resistance brought by traditional elastic collet groove is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool processing technology, and in particular to a novel heat-shrinkable collet. Background Technology

[0002] Collets are devices used to hold cutting tools in CNC machining. Currently, most common collets have a cross-slot design. The cutting tool is inserted into the collet and squeezed to open the slot. The mechanical principle of elastic deformation is used to lock the cutting tool in the collet, ensuring machining accuracy and stability.

[0003] However, existing collets have poor roundness of the outer circle and inner hole at the front end due to their cross-slot design, resulting in low clamping accuracy. Furthermore, the slotting reduces the contact area between the collet and the tool, leading to a decrease in clamping force. Additionally, the slotting increases wind resistance when the collet and tool rotate at high speed during machining, causing the collet to vibrate and reducing tool life. Therefore, this application proposes a novel heat-shrinkable collet. Utility Model Content

[0004] Therefore, it is necessary to provide a novel heat-shrinkable collet to address the aforementioned technical problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A novel heat-shrinkable collet is used for clamping and fixing CNC machining tools.

[0007] It includes a rear cylinder and a front cylinder, which are integrally fixed together. The rear cylinder has a threaded through hole inside, and the front cylinder has a clamping through hole inside. The threaded through hole and the clamping through hole are connected.

[0008] In a preferred embodiment of the heat-shrinkable collet provided by this utility model, a CNC tool holder is provided at the end of the rear cylinder away from the front cylinder. The rear cylinder is pulled into the CNC tool holder and is threadedly connected to the CNC tool holder through a threaded through hole.

[0009] In a preferred embodiment of the heat-shrinkable new collet provided by this utility model, both the rear end collet and the front end collet are made of heat-fitting special stainless steel.

[0010] In a preferred embodiment of the heat-shrinkable new collet provided by this utility model, the length of the rear cylinder is less than the length of the front cylinder.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The novel heat-shrinkable collet provided by this utility model, through its overall structural design, enables the clamping and holding of tools using the principle of thermal expansion and contraction, achieving a slotless clamping without the need for slotting. Furthermore, its slotless design allows for:

[0013] 1. It fundamentally changes the traditional elastic clamping method of collets, greatly improving the roundness and concentricity of the collet's inner hole and outer circle, thereby improving the clamping accuracy by several times;

[0014] 2. The increased contact area during clamping increases the clamping force of this collet by 30% compared to traditional elastic collets, doubling its stability.

[0015] 3. When used in high-speed rotation scenarios above 10,000 RPM, it greatly reduces the wind resistance caused by traditional elastic collet grooves, directly increasing the tool's service life by 20%. Attached Figure Description

[0016] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall structure of the heat-shrinkable novel collet provided by this utility model;

[0018] Figure 2 A schematic diagram of the structure of the heat-shrinkable novel collet with threaded through hole provided by this utility model;

[0019] Figure 3 This is a cross-sectional view of the structure between the rear and front cylindrical bodies of the heat-shrinkable novel collet provided by this utility model.

[0020] The markings in the diagram are explained as follows:

[0021] 1. Rear end cylinder; 2. Front end cylinder; 3. Threaded through hole; 4. Clamping through hole. Detailed Implementation

[0022] As described in the background art, existing collets have poor roundness of the outer circle and inner hole at the front end due to their cross-slot design, resulting in low clamping accuracy. Furthermore, the slotting reduces the contact area between the collet and the tool, leading to a decrease in clamping force. Additionally, when the collet and tool rotate at high speed during machining, the slotting increases wind resistance, causing the collet to vibrate and reducing the tool's lifespan.

[0023] To solve this technical problem, this utility model provides a novel heat-shrinkable collet, which is used to clamp and fix CNC machining tools.

[0024] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] Please refer to Figure 1-3 A novel heat-shrinkable collet includes a rear cylindrical body 1 and a front cylindrical body 2, which are integrally fixed together. The length of the rear cylindrical body 1 is less than the length of the front cylindrical body 2. A threaded through hole 3 is provided inside the rear cylindrical body 1, and a clamping through hole 4 is provided inside the front cylindrical body 2. The threaded through hole 3 and the clamping through hole 4 are connected.

[0027] A CNC tool holder is provided at the end of the rear cylinder 1 away from the front cylinder 2. When the tool is inserted into the clamping through hole 4 and clamped, the threaded through hole 3 is used to facilitate the installation and connection of this collet and the CNC tool holder. That is, the rear cylinder 1 is pulled into the CNC tool holder and connected to the CNC tool holder by thread through the threaded through hole 3.

[0028] Meanwhile, both the rear cylinder 1 and the front cylinder 2 are made of heat-fitting special stainless steel with significant differences in thermal expansion coefficients, which facilitates high-precision clamping through heating and cooling processes;

[0029] The process of using the heat-shrinkable collet provided by this utility model is as follows: When in use, the collet is heated at high temperature, which causes the clamping through hole 4 to expand and become larger, making it easier to insert the tool into the clamping through hole 4. Then, the collet is cooled down to shrink and clamp the tool. After clamping the tool, the rear cylinder 1 is pulled tight onto the CNC tool holder and the rear cylinder 1 is threadedly connected to the CNC tool holder through the threaded through hole 3.

Claims

1. A novel heat-shrinkable collet, characterized in that, It includes a rear end cylinder (1) and a front end cylinder (2), which are integrally fixed together. The rear end cylinder (1) has a threaded through hole (3) inside, and the front end cylinder (2) has a clamping through hole (4) inside. The threaded through hole (3) and the clamping through hole (4) are connected.

2. The novel heat-shrinkable collet according to claim 1, characterized in that, The rear end of the cylindrical body (1) away from the front end of the cylindrical body (2) is provided with a CNC tool holder. The rear end of the cylindrical body (1) is pulled into the CNC tool holder and is threadedly connected to the CNC tool holder through the threaded through hole (3).

3. The novel heat-shrinkable collet according to claim 1, characterized in that, Both the rear end cylinder (1) and the front end cylinder (2) are made of heat-applied special stainless steel.

4. The novel heat-shrinkable collet according to claim 1, characterized in that, The length of the rear cylinder (1) is less than the length of the front cylinder (2).

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