Planer tool with replaceable tool bit

Abstract

The utility model relates to the field of turbine rotor machining equipment, in particular to a planer tool with a replaceable tool bit. A mounting groove and a positioning groove are formed in the end face of one end of a tool bar of the planer tool and communicate with each other, and an included angle is formed between the mounting groove and the positioning groove; the tool bit comprises a planing part and a positioning part, a blade is arranged on the side, away from the positioning part, of the planing part, the planing part is detachably installed in the installation groove, and when the planing part is installed in the installation groove, the positioning part is clamped in the positioning groove, and the blade extends out of the surface of the tool bar; the connecting piece is detachably connected with the positioning part and the positioning groove and used for fixing the positioning part in the positioning groove. The tool bit of the planer tool can be detached and replaced according to machining requirements, the tool bar does not need to be replaced, materials are saved, and waste is avoided; the detachable mode of the tool bit and the tool bar is simple, rapid operation of tool bit replacement can be achieved, and the working efficiency is improved; the tool bit is limited in the positioning groove through the positioning part, enough stability can be provided for the tool bit, and the machining accuracy of the blade root groove of the steam turbine rotor is guaranteed.

Description

Technical Field

[0001] This application relates to the field of impeller rotor processing equipment, and specifically to a planer with interchangeable cutter heads. Background Technology

[0002] Machining blade root slots is an essential manufacturing process in turbine rotor processing. The end window of the blade root slot is the final step in the entire process. Conventionally, a high-speed steel blade is used to shape the end window into a planer, which is then used to perform planing on the turbine rotor. Because turbine rotors use different materials, their hardness varies during machining. Furthermore, different turbine rotor models exist, each with different blade root slot sizes. All of these factors result in a variety of planer models for the end window of the blade root slot, each made from high-speed steel strips of varying sizes.

[0003] In the existing technology, since these shaped planer blades are all integrally formed from the cutter head, cutter shank, or cutter body, the planer blades often become unusable after only two or three uses because the formed part shrinks. The cutter head cannot be replaced and the cutter shank cannot be reused, resulting in a huge waste of materials. Even if there are some planer blades with replaceable cutter heads, the convenience of disassembling and installing the planer blades needs to be considered. Moreover, since the planer blades are installed on the machine tool and need to withstand a certain planing force and have extremely high precision requirements, the detachable structure of the planer blades in the existing technology cannot meet the high precision requirements of frequent disassembly and high-intensity planing operations. Utility Model Content

[0004] To solve, or at least partially solve, the aforementioned technical problems, this application provides a replaceable-head planer for machining blade root grooves of a steam turbine rotor, comprising:

[0005] A tool holder, wherein an installation groove and a positioning groove are provided on the end face of one end of the tool holder, and the installation groove and the positioning groove are connected and set at an included angle;

[0006] The cutter head includes a planing part and a positioning part. The planing part has a cutting edge on the side away from the positioning part. The planing part is detachably installed in the mounting groove. When the planing part is installed in the mounting groove, the positioning part is engaged in the positioning groove, and the cutting edge extends out of the surface of the cutter bar.

[0007] The connector is detachably connected to the positioning part and the positioning groove, respectively, and is used to fix the positioning part in the positioning groove.

[0008] Optionally, the positioning groove has a first sidewall on each of its opposite sides, and the mounting groove has a second sidewall that forms an angle with the first sidewall. When the planing part is installed in the mounting groove, the two sides of the positioning part abut against the first sidewall, and the side of the planing part closest to the positioning part abuts against the second sidewall.

[0009] Optionally, the positioning groove is perpendicular to the mounting groove, and the cutting head is a T-shaped component integrally formed by the positioning part and the planing part.

[0010] Optionally, the distance between the two first sidewalls gradually decreases from the bottom of the positioning groove towards the outside of the positioning groove, and the positioning part is inserted into the positioning groove along the extension direction of the positioning groove.

[0011] Optionally, the second sidewall is inclined toward the side away from the positioning groove, so that the angle between the second sidewall and the bottom surface of the mounting groove is less than 90 degrees.

[0012] Optionally, the positioning groove extends through the tool holder on the side away from the mounting groove to communicate with the outside of the tool holder.

[0013] Optionally, the end of the positioning part away from the planing part extends at least partially beyond the tool holder.

[0014] Optionally, the positioning groove is flush with the bottom surface of the mounting groove, the positioning part and the planing part have the same thickness value, the positioning groove and the mounting groove have the same depth value, and the thickness value and the depth value are equal, so that when the cutter head is installed in the mounting groove and the positioning groove, the end face of the cutter bar is flush.

[0015] Optionally, the bottom surface of the positioning groove has a mounting hole, the positioning part has a through positioning hole, the positioning hole corresponds to the mounting hole when the positioning part is installed in the positioning groove, and the connector passes through the positioning hole and connects to the mounting hole.

[0016] Optionally, the end of the tool bar has a tool head seat, the radial width of the tool bar is smaller than the radial width of the tool head seat, the mounting groove is provided on one side edge of the tool head seat, and the two ends of the cutting edge extend out of the surface of the tool head seat.

[0017] The replaceable-head planer provided in this application has an installation groove and a positioning groove on the end face of one end of the tool shank. The installation groove and the positioning groove are connected and set at an included angle. The planer head includes a planing part and a positioning part. The side of the planing part away from the positioning part has a cutting edge. The planing part is detachably installed in the installation groove. When the planing part is installed in the installation groove, the positioning part is engaged in the positioning groove, and the cutting edge extends out of the surface of the tool shank. A connecting piece is detachably connected to the positioning part and the positioning groove respectively to fix the positioning part in the positioning groove. The planer head can be disassembled and replaced according to processing needs without replacing the tool shank, saving materials and avoiding waste. The detachable method of the planer head and tool shank is simple and can realize quick operation of planer head replacement, improving work efficiency. The planer head is limited in the positioning groove by the positioning part, which can provide sufficient stability for the planer head and ensure the machining accuracy of the blade root groove of the turbine rotor. Attached Figure Description

[0018] To more clearly illustrate the embodiments of this application, the relevant drawings will be briefly described below. It is understood that the drawings described below are only for illustrating some embodiments of this application, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0019] Figure 1 This is a schematic diagram of the replaceable cutter head planer of this application;

[0020] Figure 2 An exploded schematic diagram of the replaceable cutter head planer of this application;

[0021] Figure 3 This is a schematic diagram of the structure of a cutter head according to an embodiment of this application;

[0022] Figure 4 This is an assembly diagram of one embodiment of a plane cutter with interchangeable blades.

[0023] Figure 5 This is a schematic diagram of the extension direction of the positioning groove in one embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the extension direction of the mounting groove in one embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100. Tool holder; 101. Tool head holder; 102. Mounting hole; 110. Mounting groove; 111. Second side wall; 120. Positioning groove; 121. First side wall;

[0027] 200. Cutting head; 210. Planing part; 211. Cutting edge; 212. Third side wall; 220. Positioning part; 221. Protrusion; 222. Positioning hole; 223. Fourth side wall;

[0028] 300. Connectors. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0032] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0033] like Figure 1 As shown, this embodiment provides a planer with interchangeable cutter heads for machining the root grooves of a steam turbine rotor, specifically for forming the end window of the root grooves of the impeller. The planer includes a cutter shank 100 and a cutter head 200. The cutter head 200 is used for planing the material, and the cutter shank 100 connects to the cutter head 200 for mounting and fixing the cutter head 200 on a lathe. Since the machining of the end window of the root groove requires changing different planers according to the different materials and sizes of the impeller, the cutter head 200 and the cutter shank 100 in this embodiment are designed to be detachable.

[0034] like Figure 2As shown, the tool holder 100 is a rod-shaped structure. One end of the tool holder 100 has an installation groove 110 and a positioning groove 120. The installation groove 110 and the positioning groove 120 are connected and set at an included angle.

[0035] like Figure 1 and Figure 2 As shown, the cutter head 200 includes a planing part 210 and a positioning part 220, and the planing part 210 and the positioning part 220 are arranged at an included angle, the angle being the same as the included angle between the mounting groove 110 and the positioning groove 120. The planing part 210 is detachably installed in the mounting groove 110, and when the planing part 210 is installed in the mounting groove 110, the positioning part 220 is precisely engaged in the positioning groove 120.

[0036] In this embodiment, the mounting groove 110 and the positioning groove 120 are set at an angle. The mounting groove 110 limits the planing part 210 in one direction, and the positioning groove 120 limits the positioning part 220 in the other direction, thereby limiting the cutter head 200 at the end of the cutter bar 100.

[0037] The planing part 210 has a cutting edge 211 on the side away from the positioning part 220. When the planing part 210 is installed in the mounting groove 110, the cutting edge 211 extends out of the surface of the tool holder 100, ensuring that the cutting edge 211 can process materials after the tool head 200 is installed.

[0038] like Figure 1 and Figure 2 As shown, this embodiment also includes a connector 300, which is detachably connected to the positioning part 220 and the positioning groove 120, respectively, to fix the positioning part 220 in the positioning groove 120 and prevent the positioning part 220 from moving relative to the positioning groove 120, thereby firmly fixing the cutter head 200 to the end of the cutter bar 100.

[0039] In this embodiment, the cutter head 200 and the cutter shank 100 of the planer are detachably connected. The cutter head 200 can be disassembled and replaced according to processing requirements without replacing the cutter shank 100, saving materials and avoiding waste. The detachable method of the cutter head 200 and the cutter shank 100 is simple and can realize the quick operation of the cutter head 200 replacement, improving work efficiency. The cutter head is limited in the positioning groove 120 by the positioning part 220, which can provide sufficient stability for the cutter head 200 when it is frequently replaced, ensuring the machining accuracy of the blade root groove of the turbine rotor.

[0040] In this embodiment, the planer blade can be replaced with different cutter heads 200. The replacement of different cutter heads 200 includes replacing with an identical cutter head 200 to replace the worn old cutter head with a new cutter head 200; or replacing with a cutter head 200 of a different material; or replacing with a cutter head 200 of a different model or shape. The planing portion 210 of the cutter head 200 may be different to provide cutting edges 211 at different positions to achieve planing operations with different requirements. However, the connection relationship between the planing portion 210 and the positioning portion 220 of the cutter head 200 should be consistent with that of other cutter heads 200 to ensure that the replaced cutter heads 200 can be fixed in the mounting groove 110 and positioning groove 120 on the end face of the tool holder 100.

[0041] In this embodiment, the connector 300 can be a screw or a threaded rod. Correspondingly, the bottom surface of the positioning groove (120) has a mounting hole 102, and the positioning part 220 has a through positioning hole 222. When the positioning part 220 is installed in the positioning groove 120, the positioning hole 222 corresponds to the mounting hole 102. The mounting hole 102 is a threaded hole. The connector 300 passes through the positioning hole 222 and is inserted into the mounting hole 102. The screw or threaded rod is connected to the threaded hole through the thread.

[0042] Of course, the positioning hole 222 can also be a threaded hole. The screw passes through the positioning hole 222 through the thread, which improves the connection stability between the connector 300 and the positioning part 220.

[0043] In one embodiment, the connector 300 may be a pin that passes through the positioning hole 222 and connects to the mounting hole 102 to limit the positioning part 220 and the positioning groove 120.

[0044] In this embodiment, as Figure 4 As shown, the axial direction of the mounting hole 102 and the positioning hole 222 is consistent with the extension direction of the tool holder 100, and the installation or removal direction of the connector 300 is directly opposite the end of the tool holder 100. In actual lathe machining, the planer is perpendicular to the machining axis, while the operator is generally located on one side of the machining axis, and the end of the planer is generally directly opposite the operator. Therefore, the installation or removal direction of the connector 300 is directly opposite the operator, which facilitates the operation of the connector 300 and improves the convenience of installing and removing the tool head 200.

[0045] In this embodiment, as Figure 2 and Figure 4 As shown, the positioning groove 120 has a first sidewall 121 on each of its opposite sides, and the mounting groove 110 is provided on one side edge of the tool holder 100. The mounting groove 110 is an open semi-groove structure. The mounting groove 110 has only a second sidewall 111 on the side close to the positioning groove 120. The second sidewall 111 forms an angle with the first sidewall 121.

[0046] Correspondingly, the planing part 210 has a third sidewall 212 on the side near the positioning part 220, and the positioning part 220 has fourth sidewalls 223 on both sides. When the planing part 210 is installed in the mounting groove 110, the fourth sidewalls 223 on both sides of the positioning part 220 abut against the two first sidewalls 121, and the third sidewall 212 of the planing part 210 abuts against the second sidewall 111. The cutter head 200 abuts against the inner wall of the tool holder 100 through the sidewalls in different directions, thereby improving the stability of the cutter head 200 connected to the tool holder 100.

[0047] In one embodiment, the positioning groove 120 is perpendicular to the mounting groove 110, and the cutting head 200 is a T-shaped component integrally formed with the positioning part 220 and the planing part 210. For example... Figure 2 and Figure 3 As shown, the positioning part 220 and the planing part 210 form a T-shape. The planing part 210 has two third side walls 212, which abut against the two second side walls 111, further improving the stability of the planing part 210 under force during planing operations.

[0048] like Figure 5 As shown, in one embodiment, the distance between the two first sidewalls 121 gradually decreases from the bottom of the positioning groove 120 towards the outer side of the positioning groove 120. That is, the positioning groove 120 is a constricted groove, and the angle formed between the first sidewalls 121 and the bottom surface of the positioning groove 120 is less than 90 degrees. Correspondingly, as... Figure 3 and Figure 5 As shown, the cross-section of the positioning part 220 is trapezoidal, and the fourth sidewalls 223 on both sides of the positioning part 220 have an inclination corresponding to that of the two first sidewalls 121.

[0049] Thus, when installing or removing the cutter head 200, the positioning part 220 can only be inserted into the positioning groove 120 on one side along the extending direction of the positioning groove 120. Figure 4 (The arrow shown indicates the insertion direction). The fourth sidewall 223 fits against the first sidewall 121. The inclined setting of the first sidewall 121 effectively restricts the movement of the positioning part 220 toward the end of the tool holder 100, further improving the stability of the tool head 200 installation.

[0050] Furthermore, such as Figure 6 As shown, the second sidewall 111 is inclined toward the side away from the positioning groove 120 so that the angle between the second sidewall 111 and the bottom surface of the mounting groove 110 is less than 90 degrees. Correspondingly, the third sidewall 212 of the planing part 210 also has the same inclination as the second sidewall 111. During installation, the third sidewall 212 fits against the second sidewall 111. The inclination of the second sidewall 111 also restricts the planing part 210 from moving toward the end of the tool holder 100, further improving the stability of the tool head 200 installation.

[0051] like Figure 1 and Figure 2 As shown, in one embodiment, the side of the positioning groove 120 away from the mounting groove 110 passes through the tool bar 100 to communicate with the outside of the tool bar 100. In this way, when it is necessary to disassemble the tool head 200, the tool head 200 can be removed by pushing the positioning part 220 on the side of the positioning groove 120 away from the mounting groove 110, which improves the convenience of replacing the tool head 200.

[0052] Furthermore, at least part of the end of the positioning part 220 away from the planing part 210 extends outside the tool holder 100. For example... Figure 1 and Figure 3 As shown, the positioning part 220 has a protrusion 221 at the end away from the planing part 210. When the positioning part 220 reaches a fixed position in the positioning groove 120, the protrusion 221 extends out from the other end of the positioning groove 120. In this way, when it is necessary to disassemble the cutter head 200, the cutter head 200 can be removed simply by pushing the protrusion 221 without the need for other tools, which makes the replacement of the cutter head 200 more convenient.

[0053] In this embodiment, as Figure 4 As shown, the bottom surface of the positioning groove 120 is flush with the bottom surface of the mounting groove 110, the positioning part 220 and the planing part 210 have the same thickness value, and the positioning groove 120 and the mounting groove 110 have the same depth value. The thickness value and the depth value are equal so that when the cutter head 200 is installed in the mounting groove 110 and the positioning groove 120, the outer surface of the cutter head 200 is flush with the end face of the cutter bar 100, ensuring the flatness of the planer end face.

[0054] Of course, in some embodiments, the bottom surfaces of the positioning groove 120 and the mounting groove 110 are stepped, and one side surface of the cutter head 200 is also stepped, with the cutter head 200 attached to the bottom surfaces of the positioning groove 120 and the mounting groove 110 with a stepped surface.

[0055] like Figure 1 and Figure 2 As shown, in one embodiment, the end of the tool holder 100 has a tool head seat 101. The radial width of the tool holder 100 is smaller than the radial width of the tool head seat 101 to avoid interference between the tool holder 100 and the workpiece during machining. In the above embodiment, both the positioning groove 120 and the mounting groove 110 are provided on the tool head seat 101. The mounting groove 110 is located on one side edge of the tool head seat 101, and both ends of the cutting edge 211 extend beyond the surface of the tool head seat 101 to ensure normal operation of the cutting edge 211.

[0056] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A planer with interchangeable cutter heads for machining root grooves of a steam turbine rotor, characterized in that, include: A tool holder (100) has an installation groove (110) and a positioning groove (120) on one end face. The installation groove (110) and the positioning groove (120) are connected and set at an included angle. The cutter head (200) includes a planing part (210) and a positioning part (220). The planing part (210) has a cutting edge (211) on the side away from the positioning part (220). The planing part (210) is detachably installed in the mounting groove (110). When the planing part (210) is installed in the mounting groove (110), the positioning part (220) is engaged in the positioning groove (120), and the cutting edge (211) extends out of the surface of the cutter bar (100). The connector (300) is detachably connected to the positioning part (220) and the positioning groove (120) respectively, and is used to fix the positioning part (220) in the positioning groove (120).

2. The planer with replaceable cutter head according to claim 1, characterized in that, The positioning groove (120) has a first sidewall (121) on each of its opposite sides, and the mounting groove (110) has a second sidewall (111) that forms an angle with the first sidewall (121). When the planing part (210) is installed in the mounting groove (110), the two sides of the positioning part (220) abut against the first sidewall (121), and the side of the planing part (210) closest to the positioning part (220) abuts against the second sidewall (111).

3. The planer with interchangeable cutter heads according to claim 2, characterized in that, The positioning groove (120) is perpendicular to the mounting groove (110), and the cutting head (200) is a T-shaped component integrally formed by the positioning part (220) and the planing part (210).

4. The planer with interchangeable cutter heads according to claim 2, characterized in that, The distance between the two first sidewalls (121) gradually decreases from the bottom of the positioning groove (120) towards the outside of the positioning groove (120), and the positioning part (220) is inserted into the positioning groove (120) along the extension direction of the positioning groove (120).

5. The planer with interchangeable cutter heads according to claim 4, characterized in that, The second sidewall (111) is inclined toward the side away from the positioning groove (120) so that the angle between the second sidewall (111) and the bottom surface of the mounting groove (110) is less than 90 degrees.

6. The planer with interchangeable cutter heads according to claim 4, characterized in that, The positioning groove (120) extends through the tool bar (100) on the side away from the mounting groove (110) to communicate with the outside of the tool bar (100).

7. The planer with interchangeable cutter heads according to claim 6, characterized in that, The end of the positioning part (220) away from the planing part (210) extends at least partially outside the tool holder (100).

8. The planer with interchangeable cutter heads according to any one of claims 1-7, characterized in that, The bottom surface of the positioning groove (120) is flush with the bottom surface of the mounting groove (110), the positioning part (220) and the planing part (210) have the same thickness value, the positioning groove (120) and the mounting groove (110) have the same depth value, and the thickness value and the depth value are equal, so that when the cutting head (200) is installed in the mounting groove (110) and the positioning groove (120), the end face of the cutting bar (100) is flush.

9. The planer with interchangeable cutter heads according to any one of claims 1-7, characterized in that, The bottom surface of the positioning groove (120) has a mounting hole (102), and the positioning part (220) has a through positioning hole (222). When the positioning part (220) is installed in the positioning groove (120), the positioning hole (222) corresponds to the mounting hole (102). The connector (300) passes through the positioning hole (222) and connects to the mounting hole (102).

10. The planer with interchangeable cutter heads according to any one of claims 1-7, characterized in that, The end of the blade (100) has a blade head seat (101), the radial width of the blade (100) is smaller than the radial width of the blade head seat (101), the mounting groove (110) is provided on one side edge of the blade head seat (101), and the two ends of the blade (211) extend out of the surface of the blade head seat (101).

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