Round workpiece clamping and rotating mechanism
Through the combination of circumferential limiting assembly, axial limiting assembly and movable clamping assembly, the problems of posture deflection and mechanical damage in chamfering processing are solved, and the stable clamping and rotation of the workpiece is achieved to ensure chamfer uniformity and machining accuracy.
Patent Information
- Application Number
- CN202422494632.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-16
AI Technical Summary
In the prior art, the installation posture of the circular workpiece on the chuck is high and prone to deflection, resulting in uneven chamfers and easily causing mechanical damage to the circumferential surface when pressed.
The circumferential limiting assembly, axial limiting assembly and movable clamping assembly are used to enclose the processing position, and the rolling element contacts the workpiece to define its rotation center and end face, ensuring the stability and accuracy of the workpiece during processing and reducing rotation resistance.
The stable clamping and rotation of the circular workpiece is achieved, ensuring uniformity of chamfering processing and no mechanical damage, and improving machining accuracy and efficiency.
Smart Images
Figure CN223172515U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of processing machine tools, and particularly relates to a clamping and rotating mechanism for circular workpieces. Background Art
[0002] A pipe cap, which is a lid used to seal the end of a pipe body and has a circular shape, is a common accessory in fitness equipment. Its general structure includes a circumferential side surface and an axial A end surface connected to one side of the circumferential side surface, and an axial B end surface is formed on the side of the circumferential side surface away from the axial A end surface. In actual processing and assembly, chamfering processing needs to be performed on the axial B end surface. When chamfering, a chuck is generally used to clamp the pipe cap, and then the chuck is driven to rotate to drive the pipe cap to rotate. The chamfering head contacts the axial B end surface, and a chamfering structure is machined on the axial B end surface as the pipe cap rotates. On the one hand, this clamping mechanism has high requirements for the installation posture of circular workpieces such as pipe caps on the chuck. If the posture is skewed, the chamfer on the end surface will be uneven. On the other hand, it is necessary to press the circumferential surface of the circular workpiece, otherwise the workpiece is likely to fall off during the processing, and pressing will leave mechanical damage on the circumferential surface. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a clamping and rotating mechanism for circular workpieces, which is suitable for clamping workpieces during the chamfering processing of circular workpieces, is convenient for ensuring the processing posture of circular workpieces, and controls the generation of undesired mechanical damage on the circumferential surface.
[0004] To achieve the above purpose, the technical solution adopted by the utility model is:
[0005] A clamping and rotating mechanism for circular workpieces includes a circumferential limiting component, an axial limiting component, a movable clamping component, and a rotating driving component for driving the circular workpiece to rotate. The circumferential limiting component, the axial limiting component, and the movable clamping component enclose a processing position for the circular workpiece. The circumferential limiting component is circumferentially distributed and is in rolling contact with the circumferential surface of the circular workpiece in the clamping state. The axial limiting component and the movable clamping component are oppositely arranged and are respectively in contact with the axial end surfaces of the circular workpiece in the clamping state. The clamping execution part of the movable clamping component corresponds to the center of the circular workpiece and rotates with the circular workpiece in the clamping state.
[0006] Preferably, the axial limiting component includes four groups of rolling body components, which respectively correspond to four quadrant areas of the circular workpiece and are in contact with the axial end surfaces of the circular workpiece.
[0007] Preferably, each rolling body component includes two mounting seats, a mounting shaft installed between the two mounting seats, and a plurality of second rolling bodies sleeved on the mounting shaft. The second rolling bodies are in rolling contact with the axial end surfaces of the circular workpiece, and the center of the circular workpiece is orthogonally projected on the extension line of the axis of the mounting shaft.
[0008] Preferably, the number of the second rolling elements on the rolling element assembly is 3 - 5.
[0009] Preferably, the movable clamping assembly includes a clamping cylinder and a clamping execution member, and the clamping execution member is rotatably mounted at the end of the piston rod of the clamping cylinder through a bearing.
[0010] Preferably, the clamping execution member is a hollow cylinder.
[0011] Preferably, the rotary drive assembly includes a rotary motor and a drive wheel. The drive wheel is coaxially mounted on the output shaft of the rotary motor and frictionally brakes against the circumferential surface of the circular workpiece, and the drive wheel is arranged in a dislocation manner with the circumferential limiting assembly.
[0012] Preferably, the circumferential limiting assembly includes at least 3 groups of first rolling elements.
[0013] Preferably, the circumferential limiting assembly includes four groups of first rolling elements, which respectively correspond to the four quadrant areas of the circular workpiece and rollingly fit against the circumferential surface of the circular workpiece.
[0014] Preferably, a part of the first rolling elements is a fixed group and another part of the first rolling elements is a movable group.
[0015] Compared with the prior art, the present utility model has the following beneficial effects:
[0016] The clamping and rotating mechanism of the present utility model encloses a machining position for a circular workpiece through a circumferential limiting assembly, an axial limiting assembly, and a movable clamping assembly. By using the circumferential limiting assembly to rollingly fit against the circular workpiece in the clamped state to define the X-axis coordinate and Z-axis coordinate of the rotation center of the circular workpiece in the machining position, and using the axial limiting assembly and the movable clamping assembly to contact the two axial end faces of the circular workpiece in the clamped state to define the Y-axis coordinate of the circular workpiece in the machining position, so as to ensure that the circular workpiece maintains the center position during the clamping operation, ensure the consistency of the machining posture of the circular workpiece, and facilitate ensuring the accuracy of rotary machining and the uniformity of chamfering. The circumferential limiting assembly rollingly fits against the circumferential surface of the circular workpiece, which can well control the generation of undesired mechanical damage on the circumferential surface. Moreover, the clamping execution member of the movable clamping assembly can be rotatably arranged and corresponds to the center of the circular workpiece, which can reduce the rotational resistance to the circular workpiece and does not affect the rotary machining while playing the limiting role. Description of the Drawings
[0017] Figure 1 It is a schematic application diagram of the circular workpiece clamping and rotating mechanism of the present utility model.
[0018] Figure 2 It is a schematic structural diagram of the clamping and rotating mechanism of the present utility model.
[0019] Markings in the figure: 10, the first rolling element; 20, the second rolling element; 31, the clamping cylinder; 32, the clamping execution component; 40, the driving wheel; 100, the circular workpiece. Detailed implementation mode
[0020] In order to make the above features and advantages of the present utility model more obvious and understandable, specific embodiments are hereby given and described in detail in conjunction with the accompanying drawings as follows.
[0021] As Figure 1 - Figure 2 shown, this embodiment provides a circular workpiece clamping and rotating mechanism, including a circumferential limiting component, an axial limiting component, a movable clamping component, and a rotating driving component for driving the circular workpiece 100 to rotate. The circumferential limiting component, the axial limiting component, and the movable clamping component enclose a processing position of the circular workpiece 100. The axial limiting component and the movable clamping component are arranged oppositely and respectively contact the axial end faces of the circular workpiece 100 in the clamping state. The circular workpiece 100 is, for example, a pipe cap.
[0022] In this embodiment, the circumferential limiting component includes at least 3 groups of first rolling elements 10, which are circumferentially distributed and rollingly fit with the circumferential surface of the circular workpiece 100 in the clamping state. Through these first rolling elements 10, the rotation space of the circular workpiece 100 and the X-axis coordinate and Z-axis coordinate of the rotation center are defined, avoiding the circular workpiece 100 deviating from its position during processing and resulting in the disconnection of the transmission and braking relationship with the rotating driving component. Specifically, the circumferential limiting component of this embodiment includes four groups of first rolling elements 10, which respectively correspond to the four quadrant areas of the circular workpiece 100 and rollingly fit with the circumferential surface of the circular workpiece 100. The two groups of first rolling elements 10 on the left are correspondingly located in the second quadrant area and the third quadrant area of the circular workpiece 100 in the coordinate system with the rotation center as the origin, the horizontally extending line on the left and right as the X-axis, and the vertically extending line on the top and bottom as the Z-axis. The two groups of first rolling elements 10 on the right are correspondingly located in the first quadrant area and the fourth quadrant area of the circular workpiece 100 in the coordinate system with the rotation center as the origin, the horizontally extending line on the left and right as the X-axis, and the vertically extending line on the top and bottom as the Z-axis. In the clamping state, these four groups of first rolling elements 10 also play a role in keeping the circular workpiece 100 from falling. The first rolling element 10 can be a deep groove ball bearing or a cylindrical roller bearing, etc., or it can also be a round wheel installed through a bearing. The number of first rolling elements 10 in the same quadrant area can be one or more.
[0023] Further, the positions of the two sets of first rolling elements 10 on the right are fixed, while the positions of the two sets of first rolling elements 10 on the left are designed to be movable. When the two sets of first rolling elements 10 on the left move to the right in place, they cooperate with the two sets of first rolling elements 10 on the right to define the rotation space of the circular workpiece 100 and the X-axis coordinate of the rotation center. When the two sets of first rolling elements 10 on the left move to the left, the limitation on the circular workpiece 100 is released. The moving mode of the two sets of first rolling elements 10 on the left can be cylinder drive or spring return, etc., as long as it can place the circular workpiece 100 in the processing position and also take out the circular workpiece 100 from the processing position.
[0024] In this embodiment, the axial limiting component includes four sets of rolling element assemblies, which respectively correspond to the four quadrant areas of the circular workpiece 100 and contact the axial end faces of the circular workpiece 100. Each rolling element assembly includes two mounting seats, a mounting shaft installed between the two mounting seats, and a plurality of second rolling elements 20 sleeved on the mounting shaft. The number of second rolling elements 20 on each rolling element assembly is 3 - 5. The second rolling elements 20 are in rolling fit with the axial end faces of the circular workpiece 100. The center of the circular workpiece 100 is orthogonally projected onto the extension line of the axis of the mounting shaft. In the clamped state, the axial end faces of the circular workpiece 100 are in point contact with the second rolling elements 20. When the circular workpiece 100 rotates, the axial end faces of the circular workpiece 100 roll on the surfaces of the second rolling elements 20 of each rolling element assembly, thereby reducing the rotation resistance of the circular workpiece 100 and enabling smooth rotational machining. The second rolling elements 20 can be deep groove ball bearings or cylindrical roller bearings, etc., or can also be round wheels installed through bearings.
[0025] In this embodiment, the movable clamping component includes a clamping cylinder 31 and a clamping execution part 32. The clamping execution part 32 is rotatably installed at the end of the piston rod of the clamping cylinder 31 through a bearing. The clamping execution part 32 is specifically a hollow cylinder. The clamping execution part 32 corresponds to the center of the circular workpiece 100 and rotates with the circular workpiece 100 in the clamped state. That is, in the clamped state during rotational machining, the clamping execution part 32 contacts the other axial end face of the circular workpiece 100, and together with the axial limiting component, it defines the Y-axis coordinate of the circular workpiece 100. Then, in cooperation with the circumferential limiting component, it jointly maintains the center position of the circular workpiece 100. At the same time, since the clamping execution part 32 is rotatably arranged, when the circular workpiece 100 rotates, it will also drive the clamping execution part 32 to rotate, which can also reduce the rotation resistance of the circular workpiece 100. After the machining is completed, the clamping cylinder 31 acts in the reverse direction to make the clamping execution part 32 move away from the circular workpiece 100.
[0026] In this embodiment, the rotation driving assembly includes a rotation motor (not shown in the figure) and a driving wheel 40. The driving wheel 40 is coaxially installed on the output shaft of the rotation motor and frictionally brakes against the circumferential surface of the circular workpiece 100. The driving wheel 40 is arranged out of alignment with the circumferential limiting assembly. Preferably, the driving wheel is a rubber wheel to increase the frictional braking force.
[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present invention, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. Circular workpiece clamping and rotating mechanism, characterized in that: It includes a circumferential limiting component, an axial limiting component, a movable clamping component, and a rotation driving component for driving a circular workpiece to rotate. The circumferential limiting component, the axial limiting component, and the movable clamping component enclose a machining position for the circular workpiece. The circumferential limiting component is circumferentially distributed and in a clamped state, it rolls and fits with the circumferential surface of the circular workpiece. The axial limiting component and the movable clamping component are oppositely arranged and in a clamped state, they respectively contact the axial end faces of the circular workpiece. The clamping execution part of the movable clamping component corresponds to the center of the circular workpiece and rotates with the circular workpiece in a clamped state.
2. The circular workpiece clamping and rotating mechanism according to claim 1, characterized in that: The axial limiting component includes four groups of rolling body components, which respectively correspond to the four quadrant areas of the circular workpiece and contact the axial end faces of the circular workpiece.
3. The circular workpiece clamping and rotating mechanism according to claim 2, characterized in that: The rolling body component includes two mounting seats, a mounting shaft installed between the two mounting seats, and a plurality of second rolling bodies sleeved on the mounting shaft. The second rolling bodies roll and fit with the axial end faces of the circular workpiece, and the center of the circular workpiece is orthogonally projected on the extension line of the axis of the mounting shaft.
4. The circular workpiece clamping and rotating mechanism according to claim 2, wherein: The number of the second rolling bodies on the rolling body component is 3 - 5.
5. The circular workpiece clamping and rotating mechanism according to claim 1, wherein: The movable clamping component includes a clamping cylinder and a clamping execution part, and the clamping execution part is rotatably installed at the end of the piston rod of the clamping cylinder through a bearing.
6. The circular workpiece clamping and rotating mechanism according to claim 5, wherein: The clamping execution part is a hollow cylinder.
7. The circular workpiece clamping and rotating mechanism according to claim 1, characterized in that: The rotation driving component includes a rotation motor and a driving wheel. The driving wheel is coaxially installed on the output shaft of the rotation motor and frictionally brakes with the circumferential surface of the circular workpiece. The driving wheel and the circumferential limiting component are arranged in a staggered manner.
8. The circular workpiece clamping and rotating mechanism according to claim 1, characterized in that: The circumferential limiting component includes at least 3 groups of first rolling bodies.
9. The circular workpiece clamping and rotating mechanism according to claim 8, characterized in that: The circumferential limiting component includes four groups of first rolling bodies, which respectively correspond to the four quadrant areas of the circular workpiece and roll and fit with the circumferential surface of the circular workpiece.
10. The circular workpiece clamping and rotating mechanism according to claim 8 or 9, characterized in that: A part of the first rolling bodies is a fixed group while another part of the first rolling bodies is a movable group.