Split groove processing tool for cold extrusion of thin-walled high-voltage electrical appliance parts

Abstract

The utility model provides a kind of open-petal groove machining tool for cold extrusion thin-wall high-voltage electrical parts, belong to tool fixture technical field, comprising: pedestal, limit seat and locking assembly.Pedestal includes bearing shaft and positioning disc, bearing shaft includes locking section, positioning section and connecting section connected in turn, and positioning disc is set on positioning section.Limit seat is detachably set on positioning section, and clamping gap is formed between limit seat and positioning disc.Limit ring groove is equipped on limit seat, and a plurality of processing cut slots are provided on the outer side wall of limit seat and communicated with limit ring groove.Locking assembly is detachably set on locking section.The utility model discloses an open-petal groove machining tool for cold extrusion thin-wall high-voltage electrical parts, which can improve the processing efficiency of open-petal groove, and prevent the deformation of cold extrusion thin-wall parts due to processing open-petal groove.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixture technology, and in particular relates to a tooling for processing slotted parts for cold extruded thin-walled high-voltage electrical components. Background Technology

[0002] In high-voltage electrical equipment, the stationary contact is a conductive component fixed to the equipment body and does not move with operation, while the moving contact is a conductive component driven by the operating mechanism and can move during the opening and closing process. The cooperation between the moving and stationary contacts enables a low-resistance path to be formed inside the high-voltage electrical equipment when closing and to quickly create a sufficient distance to withstand the system voltage when opening. Therefore, they are key components in high-voltage electrical equipment.

[0003] Typically, those skilled in the art will symmetrically cut multiple narrow slits (i.e., flap grooves) along the axial direction at the open end of the stationary contact, thereby dividing the open end of the stationary contact into multiple elastic flaps. During closing, the insertion of the moving contact into the stationary contact causes the elastic flaps to be radially expanded, generating a continuous and uniform elastic clamping force, so that the contact surfaces of the moving and stationary contacts maintain a tight and low-resistance contact effect even under mechanical vibration, thermal expansion and contraction, or slight ablation.

[0004] In existing technologies, the machining of slotted parts typically requires a milling machine. However, when the number of slotted parts on the stationary contact is large, the efficiency of milling is low. If the slots are long, the milling cutter may be damaged due to excessive stress during continuous machining, thus affecting machining efficiency and causing additional economic losses. This is especially true when the stationary contact is a cold-extruded thin-walled part, which further increases the difficulty of milling and makes the stationary contact prone to deformation during slotting, thereby increasing the scrap rate. Utility Model Content

[0005] In view of this, the present invention aims to provide a tooling for processing slotted parts for cold-extruded thin-walled high-voltage electrical components, so as to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components includes: a base, a limiting seat, and a locking assembly; the base includes a bearing shaft and a positioning plate, the bearing shaft includes a locking section, a positioning section, and a connecting section connected in sequence, and the positioning plate is disposed on the positioning section; the limiting seat is detachably disposed on the positioning section, and a clamping gap for accommodating the part to be machined is formed between the limiting seat and the positioning plate; the end face of the limiting seat near the positioning plate is provided with a limiting ring groove for accommodating the open end of the part to be machined, and multiple machining grooves communicating with the limiting ring groove are provided on the outer wall of the limiting seat, and the length direction of any one of the machining grooves is parallel to the bearing shaft; the locking assembly is detachably disposed on the locking section, and the locking assembly contacts the end face of the limiting seat away from the positioning plate.

[0008] Furthermore, the limiting seat includes: a limiting plate, a limiting sleeve, and an inner liner ring; the limiting sleeve is detachably disposed on the end face of the limiting plate near the positioning plate, and the machining groove is disposed on the side wall of the limiting sleeve; an installation connecting pipe is also provided on the end face of the limiting plate near the positioning plate, and the inner liner ring is detachably disposed on the installation connecting pipe, forming the limiting ring groove between the outer side wall of the inner liner ring and the inner side wall of the limiting sleeve.

[0009] Furthermore, the limiting plate is provided with a plurality of first connecting holes, and the plurality of first connecting holes are arranged in a ring around the axis of the limiting plate; a connecting bolt is provided in the first connecting hole, and a plurality of second connecting holes for accommodating the connecting bolt are provided on the end face of the limiting sleeve, and the plurality of second connecting holes are arranged in a ring around the axis of the limiting sleeve.

[0010] Furthermore, the first connecting hole is an elongated hole whose length direction is parallel to the radial direction of the connecting disc.

[0011] Furthermore, the inner lining ring includes a support section and a stop section. The stop section is located at the end of the support section near the limiting plate. The outer diameter of the stop section is equal to the inner diameter of the limiting sleeve. The outer diameter of the support section is equal to the inner diameter of the part to be processed. The limiting ring groove is formed between the outer wall of the support section and the inner wall of the limiting sleeve.

[0012] Furthermore, the locking assembly includes a locking nut, and the outer side wall of the locking section is provided with an external thread that mates with the locking nut.

[0013] Furthermore, the locking assembly also includes a pressure plate, which is located between the locking nut and the limiting seat. The pressure plate has a mounting hole for accommodating the locking section, and a disassembly cut is provided on the side wall of the pressure plate that communicates with the mounting hole.

[0014] Furthermore, the end face of the positioning disk near the limiting seat is provided with a receiving groove for accommodating the closed end of the part to be processed, a positioning hole is provided inside the receiving groove, and a positioning pin is provided in the positioning hole.

[0015] Furthermore, the positioning segment is provided with a positioning key, the limiting seat is provided with an assembly hole for accommodating the positioning segment, and the inner wall of the assembly hole is provided with an assembly keyway for accommodating the positioning key.

[0016] Furthermore, a center alignment groove is provided on the end face of the locking section away from the positioning section.

[0017] Compared with the prior art, the slotting tooling for cold-extruded thin-walled high-voltage electrical parts described in this utility model has the following advantages:

[0018] (1) The tooling for machining the slit groove of cold-extruded thin-walled high-voltage electrical parts described in this utility model can clamp and fix the workpiece to be machined through a positioning plate and a limiting seat. In use, the operator can first clamp and fix the workpiece to be machined using the tooling, then clamp and fix the connecting section using a three-jaw chuck, and use a four-axis tailstock to abut the end of the locking section. At this point, the slit groove can be machined using a cutting blade in a CNC machining equipment. Compared with traditional milling machine machining, it has higher machining efficiency and accuracy, and can effectively prevent tool damage. Furthermore, this tooling has a limiting ring groove and a machining groove on the limiting seat. The machining groove provides space for machining the slit groove, and the limiting ring groove effectively supports the open end of the workpiece to be machined, thereby preventing deformation of the cold-extruded thin-walled part during the machining of the slit groove.

[0019] (2) The tooling for processing cold-extruded thin-walled high-voltage electrical parts described in this utility model has a limiting sleeve and an inner liner ring in the limiting seat that are detachably connected to the limiting plate. Therefore, when the diameter specification or the number of opening slots of the part to be processed changes, the operator can replace the limiting sleeve and the inner liner ring according to the actual needs, thereby improving the adaptability of this tooling. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0021] Figure 1 This is a schematic diagram showing the usage state of the slotted machining tooling for cold-extruded thin-walled high-voltage electrical parts described in this embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the tooling for machining slotted cold-extruded thin-walled high-voltage electrical parts according to an embodiment of the present invention;

[0023] Figure 3This is an exploded view of the tooling for machining slotted cold-extruded thin-walled high-voltage electrical parts according to an embodiment of the present invention;

[0024] Figure 4 This is an exploded view of the limiting seat described in an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the part to be processed according to an embodiment of the present utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 11-Locking section; 111-Top alignment groove; 12-Positioning section; 121-Positioning key; 13-Connecting section; 2-Positioning plate; 21-Receiving groove; 22-Positioning pin; 3-Limiting plate; 31-Installation pipe; 32-First connecting hole; 321-Connecting bolt; 33-Assembly hole; 331-Assembly keyway; 4-Limiting sleeve; 41-Machining groove; 51-Support section; 52-Abutting section; 61-Locking nut; 62-Pressure plate; 621-Mounting hole; 622-Disassembly and assembly notch; 71-Four-axis tailstock; 72-Three-jaw chuck; 73-Cutting disc; 8-Part to be processed; 81-Center hole; 82-Bottom hole; 83-Split groove. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] 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., indicating orientation or positional relationships based on the orientation or positional relationships 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," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] A tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components, the structure of which can be made from... Figure 2 , Figure 3 and Figure 4 The following diagram illustrates the process. As shown in the figure, the tooling for machining slotted cold-extruded thin-walled high-voltage electrical components in this embodiment includes a base, a limiting seat, and a locking assembly. The base provides a clamping and positioning foundation for the part 8 to be machined, and also provides an assembly foundation for the limiting seat and the locking assembly. The limiting seat cooperates with the base to clamp and limit the part 8 to be machined, while the locking assembly abuts against the limiting seat to ensure a stable clamping effect for the part 8 to be machined.

[0033] Specifically, such as Figure 2 and Figure 3 As shown, the base includes a bearing shaft and a positioning plate 2. The bearing shaft includes a locking section 11, a positioning section 12, and a connecting section 13 connected in sequence, and the positioning plate 2 is disposed on the positioning section 12. A limiting seat is detachably disposed on the positioning section 12, and a clamping gap for accommodating the workpiece 8 to be processed is formed between the limiting seat and the positioning plate 2. A limiting ring groove for accommodating the open end of the workpiece 8 to be processed is provided on the end face of the limiting seat near the positioning plate 2. Multiple processing grooves 41 communicating with the limiting ring groove are provided on the outer wall of the limiting seat, and the length direction of any one of the processing grooves 41 is parallel to the bearing shaft. A locking assembly is detachably disposed on the locking section 11, and the locking assembly contacts the end face of the limiting seat away from the positioning plate.

[0034] Figure 1 This is a schematic diagram showing the usage status of this tooling. Figure 5 This is a structural schematic diagram of part 8 to be processed. (Example) Figure 5 As shown, one end of the part 8 to be processed is an open end, and the other end is a closed end. A central hole 81 is provided on the closed end, and a flap groove 83 extending to the side wall of the part 8 to be processed is provided on the open end. Figure 1As shown, before processing, the operator can first clamp and fix the connecting section 13 using the three-jaw chuck 72. Then, the bearing shaft is inserted into the part 8 to be processed along the central hole 81. Next, the limiting seat is installed on the positioning section 12, and the open end of the part 8 to be processed is inserted into the limiting ring groove on the limiting seat, thereby clamping and fixing the part 8 to be processed with the help of the limiting seat and the positioning plate 2. At this time, the inner wall of the limiting ring groove will contact the inner wall of the part 8 to be processed, and the outer wall of the limiting ring groove will contact the outer wall of the part 8 to be processed, thus effectively preventing the cold-extruded thin-walled part 8 from deforming during subsequent processing. Subsequently, the operator can install the locking assembly on the locking section 11 and apply a resisting force to the limiting seat through the locking assembly to achieve a stable clamping effect for the part to be processed. Finally, the end of the locking section 11 is resisted by the four-axis tailstock 71 to facilitate subsequent processing of the part 8 by the CNC equipment. During processing, the cutting blade 73 in the CNC machine moves towards the workpiece 8. Because the limiting seat has a machining groove 41, the cutting blade 73 will not damage the limiting seat when cutting the workpiece 8. After completing the machining of one lobed groove 83, the cutting blade 73 moves away from the workpiece 8. At this point, the workpiece 8 can be rotated by the cooperation of the three-jaw chuck 72 and the four-axis tailstock 71, allowing the cutting blade 73 to process the next lobed groove 83. Accordingly, the operator can program the CNC machine according to the required number of lobed grooves 83, enabling the CNC machine to automatically form multiple lobed grooves 83 on the workpiece 8, thereby improving the efficiency and accuracy of lobed groove machining.

[0035] Optionally, in this embodiment, a positioning key 121 may be provided on the positioning section 12, and an assembly hole 33 for accommodating the positioning section 12 may be provided on the limiting seat, and an assembly keyway 331 for accommodating the positioning key 121 may be provided on the inner side wall of the assembly hole 33. The cooperation between the positioning key 121 and the assembly keyway 331 enables the torque on the bearing shaft to be transmitted to the limiting seat, ensuring that the limiting seat rotates synchronously with the bearing shaft.

[0036] Furthermore, to improve the clamping reliability of the workpiece 8 and prevent abnormal rotation of the workpiece 8 on the bearing shaft, the end face of the positioning plate 2 near the limiting seat may be provided with a receiving groove 21 for accommodating the closed end of the workpiece 8. A positioning hole is provided inside the receiving groove 21, and a positioning pin 22 is provided in the positioning hole. During clamping, the operator can insert the positioning pin 22 into the bottom hole 82 of the workpiece 8, thereby using the cooperation of the positioning pin 22 and the bottom hole 82 to circumferentially limit the workpiece 8.

[0037] As an optional implementation of this embodiment, in order to ensure good concentricity and reliable abutment between the four-axis tailstock 71 and the locking section 11, a top alignment groove 111 may also be provided on the end face of the locking section 11 away from the positioning section 12.

[0038] like Figure 3 As shown, the locking assembly in this embodiment may include a locking nut 61, and an external thread that mates with the locking nut 61 is provided on the outer wall of the locking section 11. After the workpiece 8 to be processed is clamped by the limiting seat and the positioning plate 2, the locking nut 61 can be driven to move in the direction of the positioning plate 2, thereby pressing the limiting seat and ensuring that the workpiece 8 to be processed receives sufficient axial clamping force.

[0039] In addition, the locking assembly may also include a pressure plate 62, which may have a mounting hole 621 for accommodating the locking section 11, and a disassembly / removal cutout 622 communicating with the mounting hole 621 on the side wall of the pressure plate 62. During assembly, the pressure plate 62 should be positioned between the locking nut 61 and the limiting seat to improve the bearing effect of the locking nut 61 on the limiting seat. The operator can replace the pressure plate 62 according to the axial dimension of the actual part to be processed, and the pressure plate 62 can be quickly disassembled and assembled from the bearing shaft through the disassembly / removal cutout 622, so that the locking assembly has a wider range of applications and greater flexibility of use.

[0040] In actual work, parts 8 of different specifications often have differences in diameter and the number of slots. To improve the adaptability of this tooling, such as... Figure 4 As shown, the limiting seat in this embodiment may include: a limiting disc 3, a limiting sleeve 4, and an inner liner ring. The limiting sleeve 4 is detachably mounted on the end face of the limiting disc 3 near the positioning disc 2, and a machined groove 41 is provided on the side wall of the limiting sleeve 4. An installation connecting pipe 31 is also provided on the end face of the limiting disc 3 near the positioning disc 2, and the inner liner ring is detachably mounted on the installation connecting pipe 31 (the inner liner ring and the installation connecting pipe 31 can be detachably connected by a threaded connection). A limiting ring groove is formed between the outer side wall of the inner liner ring and the inner side wall of the limiting sleeve 4.

[0041] When in use, the operator can select the specifications of the inner liner ring according to the inner diameter of the part to be processed 8, and select the specifications of the limiting sleeve 4 according to the outer diameter of the part to be processed 8 and the number of slots 83. The appropriate inner liner ring and limiting sleeve 4 are then installed on the limiting plate 3 so that the part to be processed 8 can obtain a good limiting and support effect.

[0042] Optionally, to achieve a detachable connection between the limiting sleeve 4 and the limiting plate 3, the limiting plate 3 may be provided with multiple first connecting holes 32, which are arranged in a ring around the axis of the limiting plate 3. Connecting bolts 321 are provided in the first connecting holes 32. Multiple second connecting holes for accommodating the connecting bolts 321 are provided on the end face of the limiting sleeve 4, and these second connecting holes are also arranged in a ring around the axis of the limiting sleeve 4. During assembly, workers can reliably install the limiting sleeve 4 onto the limiting plate 3 using the connecting bolts 321 to prevent the limiting sleeve 4 from separating from the limiting plate 3 during use.

[0043] Furthermore, to accommodate different specifications of the limiting sleeve 4, the first connecting hole 32 can be configured as an elongated hole parallel to the radial direction of the connecting disc. During use, the operator can adjust the position of the connecting bolt 321 inside the first connecting hole 32 according to the diameter of the limiting sleeve 4, thus completing the assembly between the limiting sleeve 4 and the limiting disc 3.

[0044] like Figure 4 As shown, to further improve the clamping and support reliability of the part 8 to be processed, the inner liner ring may include a support section 51 and a stop section 52. The stop section 52 is located at the end of the support section 51 near the limiting plate 3. The outer diameter of the stop section 52 is equal to the inner diameter of the limiting sleeve 4, and the outer diameter of the support section 51 is equal to the inner diameter of the part 8 to be processed. A limiting ring groove is formed between the outer wall of the support section 51 and the inner wall of the limiting sleeve 4. In use, the end face of the stop section 52 can contact the open end of the part 8 to be processed, improving the stability of the part 8 when processing the slot 83. The support section 51 can provide good support for the inner wall of the part 8 to be processed, preventing deformation of the part 8.

[0045] The effects of the above solution are explained below:

[0046] This embodiment provides a tooling for machining slotted parts in cold-extruded thin-walled high-voltage electrical components. It clamps and fixes the part to be machined using a positioning plate and a limiting seat, facilitating the machining of the slotted parts using CNC equipment, thus improving machining efficiency and accuracy. Secondly, this tooling effectively supports the inner and outer walls of the open end of the part to be machined, preventing deformation. Furthermore, the limiting sleeve and inner liner ring can be replaced according to the actual dimensions of the part to be machined, thus having a wider range of applications.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components, characterized in that, include: Base, limit seat, and locking assembly; The base includes a bearing shaft and a positioning plate (2). The bearing shaft includes a locking section (11), a positioning section (12), and a connecting section (13) connected in sequence, and the positioning plate (2) is disposed on the positioning section (12). The limiting seat is detachably disposed on the positioning section (12), and a clamping gap for accommodating the workpiece (8) is formed between the limiting seat and the positioning plate (2). The end face of the limiting seat near the positioning plate (2) is provided with a limiting ring groove for accommodating the open end of the workpiece (8). Multiple processing grooves (41) communicating with the limiting ring groove are provided on the outer wall of the limiting seat, and the length direction of any one of the processing grooves (41) is parallel to the bearing shaft. The locking assembly is detachably disposed on the locking section (11), and the locking assembly is in contact with the end face of the limiting seat away from the positioning plate.

2. The tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components according to claim 1, characterized in that: The limiting seat includes: a limiting plate (3), a limiting sleeve (4), and an inner liner ring; the limiting sleeve (4) is detachably disposed on the end face of the limiting plate (3) near the positioning plate (2), and the machining groove (41) is disposed on the side wall of the limiting sleeve (4); an installation pipe (31) is also provided on the end face of the limiting plate (3) near the positioning plate (2), and the inner liner ring is detachably disposed on the installation pipe (31), and the limiting ring groove is formed between the outer side wall of the inner liner ring and the inner side wall of the limiting sleeve (4).

3. The tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components according to claim 2, characterized in that: The limiting plate (3) is provided with a plurality of first connecting holes (32), and the plurality of first connecting holes (32) are arranged in a ring around the axis of the limiting plate (3); a connecting bolt (321) is provided in the first connecting hole (32), and a plurality of second connecting holes for accommodating the connecting bolt (321) are provided on the end face of the limiting sleeve (4), and the plurality of second connecting holes are arranged in a ring around the axis of the limiting sleeve (4).

4. The tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components according to claim 3, characterized in that: The first connecting hole (32) is an elongated hole whose length direction is parallel to the radial direction of the connecting disc.

5. The tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components according to claim 2, characterized in that: The inner lining ring includes a support section (51) and a stop section (52). The stop section (52) is located at the end of the support section (51) near the limiting plate (3). The outer diameter of the stop section (52) is equal to the inner diameter of the limiting sleeve (4). The outer diameter of the support section (51) is equal to the inner diameter of the part to be processed (8). The limiting ring groove is formed between the outer wall of the support section (51) and the inner wall of the limiting sleeve (4).

6. The tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components according to claim 1, characterized in that: The locking assembly includes a locking nut (61), and an external thread that mates with the locking nut (61) is provided on the outer side wall of the locking section (11).

7. The tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components according to claim 6, characterized in that: The locking assembly also includes a pressure plate (62), which is located between the locking nut (61) and the limiting seat. The pressure plate (62) has a mounting hole (621) for accommodating the locking section (11), and a disassembly cut (622) communicating with the mounting hole (621) is provided on the side wall of the pressure plate (62).

8. The tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components according to claim 1, characterized in that: The positioning plate (2) has a receiving groove (21) on the end face near the limiting seat for accommodating the closed end of the part to be processed (8). A positioning hole is provided inside the receiving groove (21), and a positioning pin (22) is provided in the positioning hole.

9. The tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components according to claim 1, characterized in that: The positioning segment (12) is provided with a positioning key (121), and the limiting seat is provided with an assembly hole (33) for accommodating the positioning segment (12), and the inner sidewall of the assembly hole (33) is provided with an assembly keyway (331) for accommodating the positioning key (121).

10. The tooling for machining slotted parts for cold-extruded thin-walled high-voltage electrical components according to claim 1, characterized in that: The locking section (11) has a top alignment groove (111) on its end face away from the positioning section (12).

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