Centerless grinding cut-in tool rest
By using a centerless grinding tool holder with synchronous rotation design, the problem of runout caused by uneven rotation during grinding of long parts is solved, achieving high concentricity and high precision machining of workpieces, which is suitable for aerospace and precision medical components.
Patent Information
- Application Number
- CN202520157262.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-23
AI Technical Summary
When machining long parts, existing centerless grinding technology is prone to workpiece runout due to uneven rotational force, which affects concentricity and accuracy.
Design a centerless grinding infeed tool holder that uses a synchronous rotation component to contact and rotate synchronously with the workpiece. The stability of the workpiece during the grinding process is ensured by a hinge component and a reset component, including the coordinated use of the contact component and the reset component to reduce runout.
Improve the concentricity and grinding accuracy of workpieces to meet the high precision requirements of aerospace and precision medical components, and enhance processing stability and equipment flexibility.
Smart Images
Figure CN223834117U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of cylindrical external grinding devices, and in particular to a centerless grinding infeed tool holder. Background Technology
[0002] External cylindrical grinding is a technique used for precision machining of circular and symmetrical components, particularly suitable for grinding cylindrical geometries. It enables precise external grinding, improves the concentricity of cylinders, and is characterized by high precision and good repeatability. External cylindrical grinding is widely used in various industries, including aerospace parts and precision medical components. For example, radial grinding of axial pump pistons can improve smoothness and reduce friction, while grinding of bearings can improve surface finish and improve their performance under lubrication.
[0003] Centerless grinding is a precision machining technology for the outer diameter of shaft parts. It features high production efficiency and good automation adaptability, and has been widely used in the mass production of various shaft parts, especially in the bearing manufacturing industry. Centerless grinding uses the workpiece's own outer diameter as the positioning reference. The grinding wheel and guide wheel rotate in the same direction, with the guide wheel driving the workpiece's rotation, and the grinding wheel removing material. However, for longer parts, in traditional machining methods where some parts are not entirely cut inside the grinding wheel, uneven rotational forces can cause workpiece runout, leading to substandard roundness.
[0004] Therefore, those skilled in the art are dedicated to developing a centerless grinding tool holder that allows the synchronous rotation device to closely adhere to the workpiece and rotate synchronously with it, thereby improving the concentricity of the workpiece. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a centerless grinding entry tool holder, which facilitates the synchronous rotation device to closely follow the workpiece and rotate synchronously with the workpiece, thereby improving the concentricity of the workpiece.
[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:
[0007] A centerless cutting tool holder, including
[0008] The frame has a base and a support frame;
[0009] An outer diameter cutter is mounted on the upper end of the support frame via a mounting base.
[0010] A hinged seat is mounted on the side wall of the support frame and is disposed opposite to the mounting seat;
[0011] A hinge assembly is provided, wherein the middle part of the hinge assembly is hinged to the hinge seat, one end of the hinge assembly is connected to a synchronous rotation assembly for abutting against the workpiece, and the other end of the hinge assembly is provided with an abutting assembly and a reset assembly, the abutting assembly and the reset assembly being located on both sides of the end of the hinge assembly respectively.
[0012] The beneficial effects of adopting the above solution are: by setting a synchronous rotation component, the tool holder abuts against the workpiece and achieves synchronous rotation, which can ensure that the workpiece is always in a stable state during the grinding process of the external cylindrical cutter, avoiding the jumping phenomenon caused by uneven rotation of the workpiece itself or improper cooperation with the external cylindrical cutter or other grinding tools. This synchronous rotation mechanism can effectively improve the concentricity of the workpiece, enabling it to achieve higher precision requirements after grinding, and meeting the application scenarios such as aerospace parts and precision medical components that are extremely sensitive to concentricity.
[0013] The abutment component and reset component at the end of the hinge assembly are located on both sides. The abutment component can apply an appropriate abutment force to the workpiece, and the reset component is used to reset after processing, which further enhances the stability of the workpiece during the grinding process. This allows the workpiece to be effectively supported and corrected in a timely manner when subjected to external forces such as grinding force and its own weight, reducing concentricity deviation caused by workpiece offset or tilt, thereby improving the processing quality of the workpiece.
[0014] Based on the above technical solution, the present invention can be further improved as follows.
[0015] Furthermore, the mounting base includes a support block, which connects the support frame and the outer circular cutter via connecting bolts.
[0016] The beneficial effects of adopting the above-mentioned further solution are: by using connecting bolts to connect the outer diameter cutter to the upper end of the support frame, it is not only possible to ensure that the outer diameter cutter is firmly installed and prevent it from loosening due to vibration or external force during processing, but also to facilitate fine adjustment of the position of the outer diameter cutter or quick replacement of different outer diameter cutters to adapt to the processing requirements of different workpieces and improve the flexibility and adaptability of the equipment.
[0017] Furthermore, the hinge seat includes a hinge block, which is mounted on the side wall of the support frame. The hinge block has a hinge arm, which is hinged to the hinge assembly.
[0018] The beneficial effects of adopting the above-mentioned further solution are: the hinge block enables it to be firmly installed on the side wall of the support frame, and the hinge arm is hinged to the hinge assembly, which enables the hinge seat to withstand a large torque and vibration, maintain the stable rotation of the hinge assembly, thereby improving the structural strength and machining stability of the entire tool holder.
[0019] Furthermore, the hinge assembly includes a hinged rotating rod, the hinged rotating rod having a rotating cavity, the hinged arm passing through the rotating cavity, and the outer wall of the rotating cavity being hinged to the hinged arm by a rotating pin.
[0020] The beneficial effects of adopting the above-mentioned further solution are: the hinged rotating rod has a rotating cavity, which allows the hinged arm to pass smoothly through it, which helps to reduce friction and wear during the rotation process, improve the rotation accuracy and life of the hinge assembly. At the same time, the outer wall of the rotating cavity is hinged to the hinged arm by the rotating pin, which facilitates disassembly and maintenance, makes it convenient to inspect and replace the hinge assembly, and reduces the maintenance cost of the equipment.
[0021] Furthermore, an adjusting rod is provided at one end of the hinged rotating rod, the adjusting rod has a strip groove, the adjusting screw passes through the strip groove and is connected to the hinged rotating rod, and the end of the adjusting rod is connected to the synchronous rotating assembly.
[0022] The beneficial effect of adopting the above-mentioned further solution is that the strip groove and adjusting screw on the adjusting rod can be used together to precisely adjust the position of the synchronous rotation component to adapt to the processing requirements of different workpieces and ensure that the contact position and angle between the synchronous rotation component and the workpiece are accurate.
[0023] Furthermore, the synchronous rotation assembly includes synchronous rotation bearings, and the two synchronous rotation bearings are respectively mounted on both sides of the end of the adjusting rod via mounting components.
[0024] The beneficial effects of adopting the above-mentioned further solutions are: synchronous rotating bearings help reduce friction, improve the smoothness and accuracy of rotation, and further enhance the machining quality of the workpiece.
[0025] Furthermore, the abutting assembly includes an abutting spring, and the hinged rotating rod is provided with a limiting hole for limiting the abutting spring. One end of the abutting spring is located in the limiting hole, and the other end of the abutting spring abuts against the side wall of the support frame.
[0026] The beneficial effects of adopting the above-mentioned further solution are: the abutment spring can provide a certain buffering effect when the hinged rotating rod is subjected to external force, reduce the impact and vibration on the equipment, protect the structural stability of the equipment, and at the same time enable the synchronous rotating bearing to have a continuous force acting on the workpiece, which is beneficial to the machining of the outer circle of the workpiece.
[0027] Furthermore, the reset assembly includes a reset cylinder, which is mounted on the side wall of the support frame via a cylinder mounting plate, and the output end of the reset cylinder is located on the side wall of the hinged rotating rod.
[0028] The resetting cylinder extends so that its output end abuts against the side wall of the hinged rotating rod and compresses the abutment spring.
[0029] The beneficial effect of adopting the above-mentioned further solution is that the reset cylinder facilitates the separation of the synchronous rotating bearing from the workpiece after processing, making it easier to quickly remove the workpiece.
[0030] Furthermore, the base is also provided with a mounting slot.
[0031] The advantage of adopting the above-mentioned further solution is that the mounting slot facilitates fixing the tool holder in a suitable position. Attached Figure Description
[0032] Figure 1 This is a schematic diagram of a centerless grinding infeed tool holder structure according to a specific embodiment of the present invention. Figure 1 ;
[0033] Figure 2 This is a schematic diagram of a centerless grinding infeed tool holder structure according to a specific embodiment of the present invention. Figure 2 ;
[0034] Figure 3 This is a schematic diagram of the hinge seat structure of a specific embodiment of the present utility model.
[0035] The attached diagram lists the components represented by each number as follows:
[0036] 1. Base; 2. Support frame; 3. Mounting seat; 4. Hinge seat; 5. Hinge assembly; 6. Synchronous rotation assembly; 7. Abutment assembly; 8. Reset assembly; 9. Support block; 10. Hinge block; 11. Hinge arm; 12. Hinge rotation rod; 13. Rotation cavity; 14. Adjusting rod; 15. Strip groove; 16. Synchronous rotation bearing; 17. Abutment spring; 18. Cylinder mounting plate; 19. Reset cylinder; 20. Mounting groove; 21. External diameter cutter. Detailed Implementation
[0037] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.
[0038] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "circumferential," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the system 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 this invention.
[0039] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0041] like Figure 1 , Figure 2 and Figure 3 As shown, a centerless grinding infeed tool holder includes...
[0042] The frame has a base 1 and a support frame 2. The base 1 is also provided with a mounting groove 20, which facilitates the installation of the cutting tool holder in a suitable position.
[0043] An outer circle cutter 21 is mounted on the upper end of the support frame 2 via a mounting base 3.
[0044] Hinged seat 4 is installed on the side wall of support frame 2 and is positioned opposite to mounting seat 3;
[0045] The hinge assembly 5 is hinged to the hinge seat 4 in the middle. One end of the hinge assembly 5 is connected to the synchronous rotation assembly 6, which is used to abut against the workpiece. The other end of the hinge assembly 5 is provided with the abutment assembly 7 and the reset assembly 8, which are located on both sides of the end of the hinge assembly 5.
[0046] In this invention, the tool holder is equipped with a synchronous rotation component 6, which abuts against the workpiece and achieves synchronous rotation. This ensures that the workpiece remains stable during the grinding process of the outer cylindrical cutter 21, avoiding the jumping phenomenon caused by uneven rotation of the workpiece itself or improper cooperation with the outer cylindrical cutter 21 or other grinding tools. This synchronous rotation mechanism can effectively improve the concentricity of the workpiece, enabling it to achieve higher precision requirements after grinding.
[0047] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the mounting base 3 includes a support block 9, which connects the support frame 2 and the outer diameter cutter 21 by connecting bolts, so that the outer diameter cutter 21 is installed firmly, and different outer diameter cutters or grinding cutters can be replaced according to actual requirements.
[0048] The hinge base 4 includes a hinge block 10, which is mounted on the side wall of the support frame 2. The hinge block 10 has a hinge arm 11, which is hinged to the hinge assembly 5 so that the hinge assembly 5 can rotate around the hinge arm 11. In the embodiment, the hinge assembly 5 includes a hinge rotating rod 12, which is generally rectangular and has a step. The hinge rotating rod 12 has a rotating cavity 13, and the hinge arm 11 passes through the rotating cavity 13. The hinge arm 11 and the rotating cavity 13 are clearance-fitted. The outer wall of the rotating cavity 13 is hinged to the hinge arm 11 by a connecting bolt or a rotating pin, so that the hinge rotating rod 12 can rotate around the connecting bolt or the rotating pin.
[0049] To facilitate the synchronous rotation assembly 6 to adapt to cylinders of different diameters, an adjusting rod 14 is provided at one end of the hinged rotating rod 12. The adjusting rod 14 is located at the step position of the hinged rotating rod 12. The adjusting rod 14 has a strip groove 15. The adjusting screw passes through the strip groove 15 and is connected to the hinged rotating rod 12. The end of the adjusting rod 14 is connected to the synchronous rotation assembly 6, and the synchronous rotation assembly 6 is located on the side of the outer circle cutter 21.
[0050] like Figure 1 , Figure 2 As shown, in this embodiment, the synchronous rotation assembly 6 includes a synchronous rotation bearing 16. The two synchronous rotation bearings 16 are respectively installed on both sides of the end of the adjusting rod 14 through the mounting parts. The outer circle of the synchronous rotation bearing 16 abuts against the workpiece. When the workpiece is rotated for grinding, the synchronous rotation bearing 16 rotates synchronously, so that the synchronous rotation bearing 16 has a continuous force acting on the workpiece, which is beneficial to the machining of the outer circle of the workpiece.
[0051] To ensure that the force exerted by the synchronous rotating bearing 16 on the workpiece remains constant, an abutment assembly is installed on the side wall of the hinged rotating rod 12. Specifically, the abutment assembly 7 includes an abutment spring 17. The hinged rotating rod 12 is provided with a limiting hole for limiting the abutment spring 17. One end of the abutment spring 17 is located in the limiting hole and is fixedly connected to the bottom of the limiting hole, and the other end of the abutment spring 17 abuts against the side wall of the support frame 2. Both ends of the abutment spring 17 abut against the hinged rotating rod 12 and the support frame 2 respectively, so that the hinged rotating rod 12 rotates around the support arm 11.
[0052] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the reset assembly 8 includes a reset cylinder 19, which is mounted on the side wall of the support frame 2 via a cylinder mounting plate 18. The output end of the reset cylinder 19 is located on the side wall of the hinged rotating rod 12. The reset cylinder 19 extends so that its output end abuts against the side wall of the hinged rotating rod 12 and compresses the abutment spring 17, causing the hinged rotating rod 12 to rotate around the hinge arm 11, thereby disengaging the synchronous rotating bearing 16 from the workpiece, which facilitates the rapid removal of the workpiece in the future.
[0053] 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.
[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A centerless grinding infeed tool holder, characterized in that: include The frame has a base (1) and a support frame (2); An outer circle cutter (21) is mounted on the upper end of the support frame (2) via a mounting base (3); A hinge seat (4) is mounted on the side wall of the support frame (2) and is positioned opposite to the mounting seat (3); The hinge assembly (5) is hinged to the hinge seat (4) in the middle. One end of the hinge assembly (5) is connected to a synchronous rotation assembly (6), which is used to abut against the workpiece. The other end of the hinge assembly (5) is provided with an abutment assembly (7) and a reset assembly (8). The abutment assembly (7) and the reset assembly (8) are located on both sides of the end of the hinge assembly (5).
2. The centerless grinding infeed tool holder according to claim 1, characterized in that: The mounting base (3) includes a support block (9), which connects the support frame (2) and the outer circular cutter (21) by connecting bolts.
3. The centerless grinding infeed tool holder according to claim 1, characterized in that: The hinge seat (4) includes a hinge block (10), which is mounted on the side wall of the support frame (2). The hinge block (10) has a hinge arm (11), which is hinged to the hinge assembly (5).
4. The centerless grinding infeed tool holder according to claim 3, characterized in that: The hinge assembly (5) includes a hinge rotating rod (12), the hinge rotating rod (12) has a rotating cavity (13), the hinge arm (11) passes through the rotating cavity (13), and the outer wall of the rotating cavity (13) is hinged to the hinge arm (11) by a rotating pin.
5. The centerless grinding infeed tool holder according to claim 4, characterized in that: One end of the hinged rotating rod (12) is provided with an adjusting rod (14), the adjusting rod (14) has a strip groove (15), the adjusting screw passes through the strip groove (15) and is connected to the hinged rotating rod (12), and the end of the adjusting rod (14) is connected to the synchronous rotating assembly (6).
6. The centerless grinding infeed tool holder according to claim 5, characterized in that: The synchronous rotation assembly (6) includes synchronous rotation bearings (16), and the two synchronous rotation bearings (16) are respectively mounted on both sides of the end of the adjusting rod (14) by mounting components.
7. The centerless grinding infeed tool holder according to claim 4, characterized in that: The abutting assembly (7) includes an abutting spring (17). The hinged rotating rod (12) is provided with a limiting hole for limiting the abutting spring (17). One end of the abutting spring (17) is located in the limiting hole, and the other end of the abutting spring (17) abuts against the side wall of the support frame (2).
8. The centerless grinding infeed tool holder according to claim 7, characterized in that: The reset assembly (8) includes a reset cylinder (19), which is mounted on the side wall of the support frame (2) via a cylinder mounting plate (18), and the output end of the reset cylinder (19) is located on the side wall of the hinged rotating rod (12). The reset cylinder (19) extends so that the output end of the reset cylinder (19) abuts against the side wall of the hinged rotating rod (12) and compresses the abutment spring (17).
9. The centerless grinding infeed tool holder according to claim 3, characterized in that: The base (1) is also provided with an installation slot (20).