Multidirectional pressing die for numerical control blade
By designing a multi-directional pressing mold, high-precision forming of complex CNC cutting tools was achieved, solving the problems of uneven forming and subsequent processing in traditional technologies, and improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 杭州超尔切削工具有限公司
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-28
AI Technical Summary
Existing technologies make it difficult to form cutting blades with complex cutting angles in one go, resulting in poor density in the sharp corner areas of the blank, which requires subsequent machining correction, affecting production efficiency and product quality.
The multi-directional pressing mold, including the mold body, punch, ejector, side slider and mandrel, is used to accurately shape the center structure and cutting angle of the CNC cutting tool by independently controlling the movement of the mandrel and the nonlinear movement of the side slider. The integrated pressure sensor realizes real-time control.
It improves the density uniformity and forming accuracy of the pressed blank, simplifies subsequent processing, extends the mold service life, and enhances production stability and yield.
Smart Images
Figure CN224168744U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of powder metallurgy technology, and in particular to a multi-directional pressing die for CNC cutting tools. Background Technology
[0002] Powder metallurgy technology plays a vital role in the machinery manufacturing industry, especially in CNC cutting tool manufacturing, where pressing processes enable the formation of high-precision, complex geometric structures. While traditional pressing techniques have laid the foundation for improving material utilization and production efficiency, the continuous upgrading of industrial demands has placed higher requirements on the density of pressed blanks, the ability to form complex geometric features, and production efficiency, thus driving the research and application of new pressing technologies.
[0003] However, existing technologies have significant limitations when processing inserts with complex cutting angles. They struggle to form complex geometric features in a single operation, resulting in poor density in the sharp corner areas of the compact. This necessitates subsequent machining processes for correction, which not only reduces production efficiency but may also damage the surface structure of the compact, affecting the quality and performance of the final product. Therefore, a novel pressing technology is urgently needed that can form inserts with complex cutting angles in a single operation and improve the uniformity of compact density. Utility Model Content
[0004] In order to form cutting inserts with complex cutting angles in one step and improve the uniformity of the compact density, this application provides a multi-directional pressing mold and pressing method for CNC inserts.
[0005] On the one hand, a multi-directional pressing die for CNC cutting tools is provided, adopting the following technical solution:
[0006] A multi-directional pressing die for CNC cutting tools, comprising:
[0007] The mold body has a central hole and a plurality of guide grooves located circumferentially around the central hole and communicating with the central hole;
[0008] Multiple side sliders are located within the guide groove;
[0009] The punch is located at the first end along the axial direction of the central hole;
[0010] An ejector is located at a second end opposite to the first end along the axial direction of the central hole, and the ejector has a through hole coaxial with the central hole;
[0011] The core rod, located within the through hole, is used to perform independent axial movement relative to the ejector to cooperate with the punch to form the central structure of the CNC cutting tool.
[0012] By adopting the above technical solution, by setting the core rod in the through hole of the ejector and enabling it to move axially independently of the ejector, the timing and position of the core rod and the punch can be controlled more precisely. This optimizes the forming process of the central structure of the CNC insert, improves the forming accuracy and stability of the central structure, and provides the possibility of controlling the flow and density distribution of powder in the central area during the pressing process, thereby improving the quality of the pressed blank and preventing powder jamming during production.
[0013] Optionally, the side slider includes a first side slider and a second side slider disposed opposite to the first side slider, and the guide groove includes a first guide groove and a second guide groove disposed opposite to the first guide groove, wherein the first side slider is located in the first guide groove and the second side slider is located in the second guide groove;
[0014] The first and second side sliders have a slider plane on the side near the central hole, and the slider plane is used to form the side plane of the CNC cutting tool.
[0015] By adopting the above technical solution, and by setting the first and second side sliders with specific planar forming surfaces, the side positioning plane required by the CNC insert can be pressed out accurately and efficiently, ensuring the accuracy of the insert installation reference and simplifying subsequent processing.
[0016] Optionally, the side slider further includes a third side slider and a fourth side slider disposed opposite to the third side slider, and the guide groove further includes a third guide groove and a fourth guide groove disposed opposite to the third guide groove;
[0017] The third and fourth side sliders have irregular curved surfaces on the side near the central hole, which are used to form the cutting angle of the CNC insert.
[0018] By adopting the above technical solution and utilizing the third and fourth side sliders with irregular curved surfaces, the complex cutting angle geometry of CNC inserts can be directly formed during the pressing stage, significantly reducing or even eliminating the subsequent costly and time-consuming peripheral grinding process.
[0019] Optionally, the first side slider, the second side slider, the third side slider, and the fourth side slider have slider guide grooves that cooperate with the first guide groove, the second guide groove, the third guide groove, and the fourth guide groove.
[0020] By adopting the above technical solution, the precise guiding fit between the slider and the mold guide groove ensures the smoothness, accuracy and stability of the slider on each side during radial movement, reduces motion interference and wear, improves the overall fitting accuracy and service life of the mold, and helps to ensure the dimensional consistency of the pressed blank.
[0021] Optionally, at least one of the third and fourth side sliders has an irregular curved surface comprising a plurality of adjustable slider units, which are used to adjust the profile of the cutting angle of the CNC insert.
[0022] By adopting the above technical solution and incorporating an adjustable unit on the slider that forms the cutting angle, the adaptability of the mold is greatly improved. This allows for convenient and precise fine-tuning of the cutting edge contour details (such as edge treatment and chamfering) to adapt to different specifications or optimize performance. It also facilitates wear compensation and extends the service life of core components. The adjustable unit is manufactured using a modular standard; when changing the type of cutting insert, only the adjustable unit needs to be replaced, without replacing the entire slider, significantly enhancing the mold's adaptability.
[0023] Optionally, the third and fourth side sliders are configured to perform non-linear motion profiles when pressed inward.
[0024] By adopting the above technical solution, the side slider that forms the cutting angle can perform non-linear, programmable motion contours. It can actively intervene in and optimize the powder filling, flow and densification process in the cutting angle area during the pressing process, thereby achieving a more uniform local density distribution, directly forming more complex cutting edge shapes, and effectively suppressing the generation of defects.
[0025] Optionally, the punch includes:
[0026] Abutting block is used to cooperate with the core rod to form the central structure of the CNC cutting tool;
[0027] A first concave surface and a first convex surface are located on the abutting block, and the first concave surface and the first convex surface are used to form the inner surface of the CNC cutting tool;
[0028] Alternatively, the ejector may include:
[0029] The second concave surface and the second convex surface are located on the side of the through hole, and the second concave surface and the second convex surface are used to form the inner surface of the CNC cutting tool.
[0030] By adopting the above technical solution, by setting specific concave and convex forming features on the punch or ejector, complex geometric features (such as chip breaking grooves, positioning grooves, etc.) on the upper or lower surface of the blade can be directly formed while axially pressing, which further improves the near-net-shape forming degree and functional integration of the pressed blank.
[0031] Optionally, at least one of the punch, the ejector, the first side slider, the second side slider, the third side slider, the fourth side slider, and the mandrel has a pressure sensor.
[0032] By integrating pressure sensors into key components of the mold, the pressure changes and distribution in various areas of the mold cavity during the pressing process can be monitored in real time, providing important real-time data support for precise process control, quality monitoring, fault diagnosis, and process optimization.
[0033] Optionally, the multi-directional pressing die for CNC cutting tools further includes:
[0034] The control system is configured to control the movement timing, movement profile, or force of at least one of the punch, the ejector, the first side slider, the second side slider 150, the third side slider, the fourth side slider, and the mandrel based on a preset program or feedback signals from the pressure sensor, so as to dynamically regulate the flow and pressure distribution of the molding powder during the pressing process.
[0035] By adopting the above technical solution and introducing a control system, it is possible to achieve precise and coordinated control of all moving parts of the mold. It can even perform closed-loop adaptive adjustment based on real-time sensor feedback, thereby enabling the execution of highly optimized complex pressing programs. This maximizes the density uniformity, dimensional accuracy, and shape complexity of the pressed blank, and has significant advantages, especially for the forming of difficult-to-press materials or precision blades, thereby improving production stability and yield.
[0036] In summary, this application includes at least one of the following beneficial technical effects:
[0037] 1. By setting the mandrel in the through hole of the ejector and enabling it to move axially independently of the ejector, the timing and position of the mandrel and the punch can be controlled more precisely, optimizing the forming process of the central structure of the CNC insert, improving the forming accuracy and stability of the central structure, and providing the possibility to control the flow and density distribution of powder in the central area during the pressing process, thereby improving the quality of the pressed blank. Furthermore, the ability of the mandrel to move axially independently of the ejector can also effectively prevent powder jamming during production.
[0038] 2. By setting an adjustable unit on the slider that forms the cutting angle, the adaptability of the mold is greatly improved, allowing for convenient and precise fine-tuning of the profile details of the cutting edge (such as edge treatment, chamfering, etc.) to adapt to different specifications or optimize performance, while also facilitating wear compensation and extending the service life of core components.
[0039] 3. This enables the side slider that forms the cutting angle to perform non-linear, programmable motion profiles. It can actively intervene in and optimize the powder filling, flow, and densification process in the cutting angle area during the pressing process, thereby achieving a more uniform local density distribution. It can directly form more complex cutting edge shapes and effectively suppress the generation of defects. Attached Figure Description
[0040] Figure 1 This is a schematic diagram of the structure of the multi-directional pressing mold for CNC cutting tools according to Embodiment 1 of this application;
[0041] Figure 2 yes Figure 1 The diagram shown is an exploded view of the multi-directional pressing die for CNC cutting tools.
[0042] Figure 3 yes Figure 1 A schematic diagram of the structure of the phantom in the diagram;
[0043] Figure 4 yes Figure 1 A schematic diagram of the structure of the second side slider in the diagram;
[0044] Figure 5 yes Figure 1 A schematic diagram of the fourth side slider in the diagram;
[0045] Figure 6 yes Figure 1 A schematic diagram of the punch structure in the middle;
[0046] Figure 7 yes Figure 1 A schematic diagram of the ejector structure in the middle;
[0047] Figure 8 yes Figure 1 Schematic diagram of the central core rod;
[0048] Figure 9 This is a schematic flowchart of a method for pressing CNC cutting tools using the multi-directional pressing mold according to an embodiment of this application.
[0049] Explanation of reference numerals in the attached drawings: 110, mold body; 120, punch; 121, abutment block; 122, first concave surface; 123, first convex surface; 130, ejector; 131, through hole; 132, second concave surface; 133, second convex surface; 140, first side slider; 150, second side slider; 160, third side slider; 170, fourth side slider; 180, core rod; 111, center hole; 112, first guide groove; 113, second guide groove; 114, third guide groove; 115, fourth guide groove; 151, slider plane; 152, slider guide groove; 171, slider irregular curved surface. Detailed Implementation
[0050] The following is in conjunction with the appendix Figure 1 —9 provides further details regarding this application.
[0051] This application discloses a multi-directional pressing mold for CNC cutting tools. Figure 1This is a schematic diagram of the structure of a multi-directional pressing mold for CNC cutting tools according to an embodiment of this application. Figure 2 yes Figure 1 The diagram shown is an exploded view of a multi-directional pressing die for CNC cutting tools. (Refer to...) Figure 1 and Figure 2 The multi-directional pressing mold includes a mold body 110, a punch 120, an ejector 130, multiple side sliders (in this embodiment, a first side slider 140, a second side slider 150, a third side slider 160, and a fourth side slider 170 are used as an example), a core rod 180, and a control system (not shown in the figure).
[0052] Figure 3 yes Figure 1 A schematic diagram of the structure of phantom 110. (Refer to...) Figure 3 The mold body 110 has a central hole 111 and a plurality of guide grooves corresponding to the side sliders (in this embodiment, a first guide groove 112, a second guide groove 113, a third guide groove 114, and a fourth guide groove 115 are used as an example). The central hole 111 is located at the center of the main body of the mold body 110, and the first guide groove 112, the second guide groove 113, the third guide groove 114, and the fourth guide groove 115 are arranged circumferentially along the central hole 111 and communicate with the central hole 111.
[0053] Optionally, the mold body 110 has internal cooling channels with a serpentine pipe design to accelerate the cooling process after molding through coolant circulation. The inlet and outlet of the cooling channels are located at the bottom of the mold body 110 for easy connection to an external cooling system.
[0054] Reference Figure 1 - Figure 3 The first side slider 140 is located at the first guide groove 112 and is configured to move closer to or further away from the center hole 111 along the first guide groove 112; the second side slider 150 is located at the second guide groove 113 and is configured to move closer to or further away from the center hole 111 along the second guide groove 113; the third side slider 160 is located at the third guide groove 114 and is configured to move closer to or further away from the center hole 111 along the third guide groove 114; the fourth side slider 170 is located at the fourth guide groove 115 and is configured to move closer to or further away from the center hole 111 along the fourth guide groove 115.
[0055] The punch 120 is located at the first end of the mold body 110 along the axial direction of its central hole 111. The ejector 130 is located at the second end of the mold body 110 opposite to the first end along the axial direction of its central hole 111. The core rod 180 is located inside the ejector 130 and passes through the ejector 130.
[0056] The first side slider 140 and the second side slider 150 are arranged opposite to each other, and the structures of the first side slider 140 and the second side slider 150 are symmetrical. The following uses the second side slider 150 as an example to specifically describe the structural shape of the first side slider 140 and the second side slider 150.
[0057] Figure 4 yes Figure 1 A schematic diagram of the structure of the second side slider 150. (Refer to...) Figure 4 The second side slider 150 has a slider plane 151 on the side near the central hole 111, which is used to form the side plane of the CNC cutting tool. The second side slider 150 has a slider guide groove 152 on the surface located to the side of the slider plane 151, and the slider guide groove 152 of the second side slider 150 cooperates with the second guide groove 113 to achieve guidance.
[0058] The third side slider 160 and the fourth side slider 170 are arranged opposite to each other, and the structures of the third side slider 160 and the fourth side slider 170 are symmetrical. The following uses the fourth side slider 170 as an example to specifically describe the structural shape of the third side slider 160 and the fourth side slider 170.
[0059] Figure 5 yes Figure 1 A schematic diagram of the fourth side slider 170. (Refer to...) Figure 5 The fourth side slider 170 has an irregular curved surface 171 on the side near the central hole 111, which is used to form the cutting angle of the CNC insert. The fourth side slider 170 has a slider guide groove 152 on the surface located to the side of the irregular curved surface 171, which cooperates with the fourth guide groove 115 to achieve guidance.
[0060] Optionally, the irregular curved surface 171 of the third side slider 160 and the fourth side slider 170 is composed of multiple independently adjustable or replaceable slider units. The slider units can be finely adjusted (e.g., by a micro actuator or an adjusting screw accessible from the back of the slider) to finely adjust the cutting edge profile (e.g., the radius of the cutting edge rounding, a specific chamfer angle) without replacing the entire slider forming surface.
[0061] The third side slider 160 and the fourth side slider 170 are connected to a slider actuator, which is configured to drive the third side slider 160 and the fourth side slider 170 to perform a preset nonlinear motion profile during inward pressing. The nonlinear motion wheel involves changing speed, multi-stage motion (e.g., initial rapid advance, intermediate hold / slight retraction, final compaction), or following a specific force distribution curve.
[0062] The irregular curved surfaces 171 of the third and fourth side sliders 160 and 170 can form a blank with a cutting angle during the CNC cutting tool pressing process, eliminating the need for subsequent peripheral grinding and improving manufacturing efficiency. Furthermore, the nonlinear motion contours of the third and fourth side sliders 160 and 170 during the inward pressing process can perform differentiated pre-compaction of the cutting edge area or guide powder flow to prevent density gradients near sharp corners, thereby achieving superior density uniformity compared to simple inward movement.
[0063] Figure 6 yes Figure 1 A schematic diagram of the punch 120. (Refer to...) Figure 6 The punch 120 has an abutment block 121 and a first concave surface 122 and a first convex surface 123 located on the abutment block 121. The abutment block 121 is used to cooperate with the core rod 180 to form the central structure of the CNC cutting tool (e.g., to contact the top of the core rod 180 to form a hollow structure), and the first concave surface 122 and the first convex surface 123 are used to form the inner surface of the CNC cutting tool.
[0064] Figure 7 yes Figure 1 A schematic diagram of the ejector 130. (Refer to...) Figure 7 The ejector 130 has a through hole 131 coaxial with the central hole 111 and a second concave surface 132 and a second convex surface 133 located on the side of the through hole. The core rod 180 passes through the through hole 131 to cooperate with the abutment block 121 to form the central structure of the CNC cutting tool, and the second concave surface 132 and the second convex surface 133 are used to form the inner surface of the CNC cutting tool.
[0065] Figure 8 yes Figure 1 A structural schematic diagram of the central core rod 180. (Refer to...) Figure 8 The core rod 180 is located within the through hole 131, passing through the through hole 131 to cooperate with the abutment block 121 to form the central structure of the CNC cutting tool. The core rod 180 is driven by an independent core rod actuator, allowing its axial position and force to be precisely controlled independently of the main motion of the ejector 130 during the pressing cycle.
[0066] The independently controlled core rod 180 can perform specific movements during slider compression, such as slightly retracting as the slider advances to draw powder to the center, or precisely timing its ejection to form specific internal features at the center or influence the geometry of the chip-breaking groove formed by the punch 120 and the ejector 130. This allows for the integration of complex central structures in a manner impossible in related technologies.
[0067] Optionally, pressure sensors are provided on the forming surfaces (i.e., the surfaces in contact with the forming powder) of the punch 120, the ejector 130, the first side slider 140, the second side slider 150, the third side slider 160, the fourth side slider 170, and the core rod 180.
[0068] The control system is configured to coordinate and program the coordinated, time-varying movements of the core rod 180, the third side slider 160, and the fourth side slider 170 independently driven according to a preset program profile or feedback from the pressure sensor, and to cooperate with the punch 120, the ejector 130, the first side slider 140, and the second side slider 150 to form the required CNC cutting tool.
[0069] The control system can coordinate the movement sequence, movement contour, or force of multiple components, including the punch 120, the ejector 130, the first side slider 140, the second side slider 150, the third side slider 160, the fourth side slider 170, and the core rod 180, based on preset instructions or feedback signals, so as to dynamically regulate the powder flow and pressure distribution in the mold cavity during the pressing process.
[0070] The implementation principle of a multi-directional pressing die for CNC inserts according to an embodiment of this application is as follows: By setting the mandrel 180 within the through hole 131 of the ejector 130 and enabling it to move axially independently of the ejector 130, the timing and position of the engagement between the mandrel 180 and the punch 120 can be controlled more precisely. This optimizes the forming process of the central structure of the CNC insert, improves the forming accuracy and stability of the central structure, and provides the possibility of controlling the flow and density distribution of powder in the central region during the pressing process, thereby improving the quality of the pressed blank. Furthermore, the ability of the mandrel 180 to move axially independently of the ejector 130 can effectively prevent powder jamming during production.
[0071] This application also discloses a method for pressing CNC cutting tools using the multi-directional pressing mold. Figure 9 This is a schematic flowchart illustrating a method for pressing CNC cutting tools using the multi-directional pressing die according to an embodiment of this application. (Refer to...) Figure 9 The method includes the following steps:
[0072] S1. Move the ejector 130, the first side slider 140, the second side slider 150, the third side slider 160, and the fourth side slider 170 toward the center hole 111 of the mold body 110 to form a mold cavity.
[0073] S2. Fill the mold cavity with powder material.
[0074] S3. Axial pressing is performed by the punch 120 and the ejector 130, and radial pressing is performed by the first side slider 140, the second side slider 150, the third side slider 160, and the fourth side slider 170 to compact the powder material into a CNC blade blank with a predetermined shape. The axial movement of the core rod 180 relative to the ejector 130 is independently controlled according to a preset program or real-time feedback to cooperate with the abutment block 121 of the punch 120 to form the central structure of the CNC blade.
[0075] Alternatively, based on a preset program or real-time feedback, the third side slider 160 and the fourth side slider 170 can be driven to execute a preset nonlinear motion profile to regulate the powder flow and density distribution in the cutting corner area of the CNC blade during the lateral pressing process.
[0076] The implementation principle of pressing CNC inserts using the multi-directional pressing mold in this application embodiment is as follows: By applying the technical means of independently controlling the movement of the core rod and / or driving the side slider to execute the nonlinear motion contour in the pressing method, the powder behavior of key areas (center hole area, cutting angle area) during the pressing process can be actively and precisely managed, optimizing the forming quality and density uniformity of these areas, so as to stably and reliably produce CNC insert blanks with high-precision center structure and complex cutting edge characteristics, and with better overall performance.
[0077] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A multi-directional pressing die for CNC cutting tools, characterized in that, include: The mold body (110) has a central hole (111) and a plurality of guide grooves located in the circumferential direction of the central hole (111) and communicating with the central hole (111). Multiple side sliders are located within the guide groove; The punch (120) is located at the first end along the axial direction of the central hole (111); Ejector (130), located at the second end opposite to the first end along the axial direction of the central hole (111), the ejector (130) having a through hole (131) coaxial with the central hole (111). The core rod (180) is located within the through hole (131) and is used to perform an independent axial movement relative to the ejector (130) to cooperate with the punch (120) to form the central structure of the CNC cutting tool.
2. The multi-directional pressing die for CNC cutting tools according to claim 1, characterized in that, The side slider includes a first side slider (140) and a second side slider (150) disposed opposite to the first side slider (140). The guide groove includes a first guide groove (112) and a second guide groove (113) disposed opposite to the first guide groove (112). The first side slider (140) is located in the first guide groove (112), and the second side slider (150) is located in the second guide groove (113). The first side slider (140) and the second side slider (150) have a slider plane (151) on the side near the central hole (111), and the slider plane (151) is used to form the side plane of the CNC cutting tool.
3. The multi-directional pressing die for CNC cutting tools according to claim 2, characterized in that, The side slider also includes a third side slider (160) and a fourth side slider (170) disposed opposite to the third side slider (160), and the guide groove also includes a third guide groove (114) and a fourth guide groove (115) disposed opposite to the third guide groove (114). The third side slider (160) and the fourth side slider (170) have an irregular surface (171) on the side near the center hole (111), which is used to form the cutting angle of the CNC insert.
4. The multi-directional pressing die for CNC cutting tools according to claim 3, characterized in that, The first side slider (140), the second side slider (150), the third side slider (160) and the fourth side slider (170) have slider guide grooves (152) that cooperate with the first guide groove (112), the second guide groove (113), the third guide groove (114) and the fourth guide groove (115).
5. The multi-directional pressing die for CNC cutting tools according to claim 3, characterized in that, At least one of the third side slider (160) and the fourth side slider (170) has a slider irregular surface (171) comprising a plurality of adjustable slider units for adjusting the profile of the cutting angle of the CNC insert.
6. The multi-directional pressing die for CNC cutting tools according to claim 3, characterized in that, The third side slider (160) and the fourth side slider (170) are configured to perform a non-linear motion profile when pressed inward.
7. The multi-directional pressing die for CNC cutting tools according to claim 1, characterized in that, The punch (120) includes: The abutment block (121) is used to cooperate with the core rod (180) to form the central structure of the CNC cutting tool; A first concave surface (122) and a first convex surface (123) are located on the abutment block (121), and the first concave surface (122) and the first convex surface (123) are used to form the inner surface of the CNC cutting tool.
8. The multi-directional pressing die for CNC cutting tools according to claim 1, characterized in that, The ejector (130) includes: The second concave surface (132) and the second convex surface (133) are located on the side of the through hole (131), and the second concave surface (132) and the second convex surface (133) are used to form the inner surface of the CNC cutting tool.
9. The multi-directional pressing die for CNC cutting tools according to claim 3, characterized in that, At least one of the punch (120), the ejector (130), the first side slider (140), the second side slider (150), the third side slider (160), the fourth side slider (170), and the core rod (180) has a pressure sensor.
10. The multi-directional pressing die for CNC cutting tools according to claim 9, characterized in that, Also includes: The control system is configured to control the movement timing, movement profile, or force of at least one of the punch (120), the ejector (130), the first side slider (140), the second side slider (150), the third side slider (160), the fourth side slider (170), and the mandrel (180) based on a preset program or feedback signal from the pressure sensor, so as to dynamically regulate the flow and pressure distribution of the molding powder during the pressing process.