Spring collet arbor

Abstract

The utility model provides a spring chuck tool shank, including tool shank body, set up assembly structure on the tool shank body, the assembly structure is used for connecting with the drill hinge rotor pinhole equipment, the first end of tool shank body is equipped with spring chuck, spring chuck has clamping hole, clamping hole is cylindrical, the second end of tool shank body is equipped with cooling ring, cooling ring with tool shank body rotatory connection, be equipped with cooling channel in cooling ring, cooling channel includes liquid inlet port and liquid outlet port, tool shank body inside is equipped with internal cooling channel, internal cooling channel extends from the second end of tool shank body to the first end of tool shank body, liquid outlet port with internal cooling channel intercommunication. The rotor adjusting stage pinhole processing efficiency low problem in the prior art of steam turbine has been solved.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine processing technology, and in particular to a spring collet tool holder. Background Technology

[0002] The regulating stage of conventional high and medium pressure rotors requires 2 turns of axial machining for about 96 positioning pin holes. Depending on the rotor type and specifications, the diameter and depth of the pin holes vary greatly, with the maximum specification being a diameter of 26mm × a length of 180mm.

[0003] Currently, the material of the turbine rotors being processed is generally 30Cr1Mo1V. The maximum speed of the specialized side-arm type drilling and reaming equipment for machining pin holes is 500 r / min. Considering machine tool conditions and the material being processed, the current processing method typically involves four steps: a twist drill with a tapered shank made of high-speed steel, a reamer, a rough reamer, and a fine reamer, to machine one pin hole. External oil cooling is used during the process, resulting in low cooling efficiency. Furthermore, the tool needs to be withdrawn and allowed to rest for a period after each drilling and reaming operation. This method of frequent reciprocating drilling and four machining steps increases non-machining and machining cycles, leading to low overall processing efficiency. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a spring collet tool holder to solve the problem of low machining efficiency of rotor regulating stage pin holes in steam turbines in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a spring collet tool holder, including a tool holder body with an assembly structure for connecting to a drilling and reaming rotor pin hole device. A spring collet with a cylindrical clamping hole is provided at the first end of the tool holder body. A cooling ring is rotatably connected to the tool holder body, and a cooling channel is provided within the cooling ring, including an inlet port and an outlet port. An internal cooling channel is provided inside the tool holder body, extending from the second end to the first end, and the outlet port communicates with the internal cooling channel.

[0006] Preferably, the assembly structure is a pin hole.

[0007] Preferably, a first sealing ring is provided at the liquid inlet port.

[0008] Preferably, a second sealing ring is provided at the liquid outlet port.

[0009] Preferably, the cooling ring is rotatably connected to the tool holder body via a bearing.

[0010] As described above, the spring collet tool holder of this utility model has the following beneficial effects: During use, because the clamping hole of the spring collet on the tool holder is cylindrical, the spring collet can clamp carbide drill bits (carbide drill bit shanks are generally cylindrical). By using higher-strength carbide drill bits for drilling and reaming, compared with drill bits made of high-speed steel in the prior art, the processing parameters can be increased, i.e., the rotational speed of the drilling and reaming rotor pin hole device can be increased, thereby improving processing efficiency. Correspondingly, during processing, the coolant flows through the cooling channel in the cooling ring to the internal cooling channel inside the tool holder body, and then flows out from the internal cooling channel and is guided along the surface of the drill bit to the drill hole, thus achieving internal cooling. Compared with the external oil cooling in the prior art, this greatly improves cooling efficiency and effect, thereby ensuring the normal operation of the carbide drill bit under high processing parameters. Therefore, compared with the prior art, using the spring collet tool holder of this utility model can greatly improve processing efficiency. Attached Figure Description

[0011] Figure 1 The diagram shown is a structural schematic of the spring collet tool holder provided by this utility model.

[0012] Figure 2 The diagram shown is a structural schematic of the cooling ring provided by this utility model.

[0013] Figure 3 The diagram shown is a schematic of the spring collet tool holder provided by this utility model in use.

[0014] Figure 4 The diagram shown is a structural schematic of the variable diameter sleeve provided by this utility model.

[0015] Explanation of reference numerals in the attached figures

[0016] 10. Handle Body

[0017] 101 Internal Cooling Channel

[0018] 102 pin hole

[0019] 11. Spring collet

[0020] 12 Cooling ring

[0021] 120 cooling aisle

[0022] 1201 Inlet Port

[0023] 1202 Discharge Port

[0024] 121 First sealing ring

[0025] 122 Second sealing ring

[0026] 100 Drilling and Reaming Equipment for Rotor Pin Holes

[0027] 200 transmission pin

[0028] 300 External liquid supply pipeline

[0029] 400 reducing sleeve Detailed Implementation

[0030] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] Please see Figures 1 to 4 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] This utility model provides a spring-loaded collet tool holder, such as Figure 1As shown, the spring collet tool holder includes a tool holder body 10, which has an assembly structure for connecting to a drilling and reaming rotor pin hole device 100. A spring collet 11 with a cylindrical clamping hole is located at the first end of the tool holder body 10. A cooling ring 12 is rotatably connected to the tool holder body 10, and a cooling channel 120 is provided within the cooling ring 12. The cooling channel 120 includes an inlet port 1201 and an outlet port 1202. Specifically, an internal cooling channel 101 is provided inside the tool holder body 10, extending from the second end to the first end. The outlet port 1202 of the cooling channel 120 within the cooling ring 12 communicates with the internal cooling channel 101.

[0035] When using the spring collet tool holder of this utility model, such as Figure 3 As shown, the spring collet shank is first installed on the drilling and reaming rotor pin hole device 100, and the liquid inlet port 1201 of the cooling ring 12 is connected to the external liquid supply pipe 300. During machining, since the clamping hole of the spring collet 11 on the spring collet shank is cylindrical, the spring collet 11 can clamp carbide drill bits (carbide drill bit shanks are generally cylindrical). By using a higher strength carbide drill bit for drilling and reaming, the drilling and reaming process can be improved compared with the drill bits made of high-speed steel in the prior art. The machining parameters, namely, increasing the rotational speed of the drill reamer rotor pin hole device 100, can improve machining efficiency. Correspondingly, during machining, coolant flows through the cooling channel 120 in the cooling ring 12 to the internal cooling channel 101 inside the tool holder body 10, and then flows out from the internal cooling channel 101 and is guided along the surface of the drill bit into the borehole, thus achieving internal cooling. Compared with the external oil cooling in the prior art, this significantly improves cooling efficiency and effect, thereby ensuring the normal operation of the carbide drill bit under high machining parameters. Therefore, compared with the prior art, the use of the spring collet tool holder of this utility model can greatly improve machining efficiency.

[0036] Specifically, such as Figure 1 and Figure 3 As shown, in this embodiment, the assembly structure is a pin hole 102. When the spring collet shank is assembled into the drill reamer pin hole device 100, a transmission pin 200 is embedded in the pin hole 102. The other end of the transmission pin 200 is connected to the side wall of the drill reamer pin hole device 100, thereby realizing the installation of the spring collet shank on the drill reamer pin hole device 100. The structure is simple and the operation is convenient.

[0037] Specifically, it should be noted that the spring collet, as a cylindrical clamp used to secure drill bits, is an existing structure. Its specific structure and clamping principle are understood by those skilled in the art, and therefore will not be elaborated upon here.

[0038] Furthermore, in this embodiment, the cooling ring 12 is rotatably connected to the tool holder body 10 via a bearing, resulting in a simple structure.

[0039] Furthermore, to improve the sealing performance at the connection between the liquid inlet port 1201 of the cooling ring 12 and the external liquid supply pipe 300, preferably, as follows: Figure 1 and Figure 2 As shown, in this embodiment, a first sealing ring 121 is provided at the liquid inlet port 1201; similarly, in order to improve the sealing performance at the connection between the liquid outlet port 1202 of the cooling ring 12 and the tool holder body 10, a second sealing ring 122 is provided at the liquid outlet port 1202.

[0040] Furthermore, to improve the applicability of this spring collet tool holder, when using it, such as... Figure 3 and Figure 4 As shown, a reducing sleeve 400 can be installed in the spring collet 11. The reducing sleeve 400 allows high-speed steel drills with tapered shanks to still be used with the spring collet tool holder, thus avoiding the waste of existing tool inventory due to changes in the spring collet tool holder structure.

[0041] In summary, the spring collet tool holder of this invention, through the internal cooling system with its cooling ring, provides a prerequisite for the use of high-efficiency tools. This allows for the optimization of machining parameters, maximizing the efficiency of specialized equipment and thus improving machining efficiency. Previously, machining a single pin hole took 20 minutes, and completing the machining of the entire rotor adjustment stage pin hole required 3 days. Now, machining a single pin hole takes 6 minutes, and the entire machining cycle is completed within one day, representing an efficiency improvement of approximately 70%, a significant effect. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0042] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A spring collet arbor characterized by, include: The tool holder body (10) is provided with an assembly structure for connecting with the drilling and reaming rotor pin hole device (100). The first end of the tool holder body (10) is provided with a spring collet (11) with a clamping hole in the shape of a cylinder. The second end of the tool holder body (10) is provided with a cooling ring (12) rotatably connected to the tool holder body (10). The cooling ring (12) is provided with a cooling channel (120) inside the cooling ring (12) including an inlet port (1201) and an outlet port (1202). The handle body (10) is provided with an internal cooling channel (101), which extends from the second end of the handle body (10) to the first end of the handle body (10), and the liquid outlet port (1202) is connected to the internal cooling channel (101).

2. A collet tool shank according to claim 1, wherein The assembly structure is a pin hole (102).

3. A spring-loaded collet shank according to claim 1, characterized in that, A first sealing ring (121) is provided at the liquid inlet port (1201).

4. A spring-loaded collet tool holder according to claim 1, characterized in that, A second sealing ring (122) is provided at the liquid outlet port (1202).

5. A spring-loaded collet tool holder according to claim 1, characterized in that, The cooling ring (12) is rotatably connected to the tool holder body (10) via a bearing.

6. A spring-loaded collet tool holder according to claim 1, characterized in that, A variable diameter sleeve (400) is detachably provided in the clamping hole on the spring collet (11).

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