A fixture applied to a numerical control machine tool
By using rotating steel balls and self-resetting spring diaphragms in the CNC machine tool fixture, the problem of clamping inclined silicon blocks was solved, the clamping accuracy was improved, the maintenance cost was reduced, and the processing quality was ensured.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 云南嘉泰来新材料有限公司
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-14
AI Technical Summary
Existing CNC machine tool fixtures cannot clamp silicon blocks correctly when there is a bevel on the end face of the crystal ingot, resulting in scrapped products and affecting processing quality.
The design employs a combination of a fixed chuck and a movable chuck, with rotating steel balls and a self-resetting spring diaphragm between them. The rotating steel balls enable multi-angle offset, while the self-resetting spring diaphragm ensures automatic reset. The design, combined with the spherical curved surface and bolt holes, ensures clamping accuracy and adaptive functionality.
It improves clamping accuracy, reduces quality defects caused by silicon block bevels, lowers silicon consumption and maintenance costs, and ensures processing quality.
Smart Images
Figure CN224488741U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material clamping technology, specifically to a clamping fixture applied to CNC machine tools. Background Technology
[0002] The integrated grinding and turning machine for photovoltaic industry production equipment requires a double-clamping method to hold the end face of the crystal ingot due to the special processing characteristics. The existing clamps are fixed and integrated. When there is a slope on the end face of the crystal ingot, the clamping head cannot hold the silicon block upright, resulting in the silicon block being clamped at an angle, and the processed product being scrapped, which may not be able to guarantee the processing quality of the crystal ingot.
[0003] The universal chuck for a silicon single crystal cutting and grinding integrated machine, with publication number CN203401394U, includes a non-metallic anti-slip pad for contacting the end face of the single crystal silicon rod to be processed. The main body of the universal chuck consists of a moving chuck block and a stationary chuck block, forming a structure similar to a thrust joint bearing. A waterproof stainless steel bellows connects the outer sides of the moving chuck block and the stationary chuck block. In the above scheme, the stationary chuck block and the moving chuck block adjust the clamping angle by the curved surface of the moving block fitting against the curved surface of the stationary block. The two are in direct contact. With the increase of the number of uses, the wear of the contact surface will gradually increase, resulting in changes in the clamping range. As the number of bending times of the moving chuck block increases, the preload pin may be subjected to changes in stress, resulting in breakage and damage to the chuck.
[0004] Therefore, it is necessary to invent a fixture for CNC machine tools to solve the above problems. Utility Model Content
[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a fixture for CNC machine tools. This fixture solves the problem that when the end face of the crystal ingot has a slope, the clamping head cannot clamp the silicon block upright, resulting in the silicon block being clamped at an angle, causing the processed product to be scrapped, and potentially failing to guarantee the quality of crystal ingot processing.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A fixture for CNC machine tools includes a fixed chuck fixedly mounted on one side of a motor reducer, a movable chuck on one side of the fixed chuck, a rotating steel ball rotatably connected between the fixed chuck and the movable chuck, and a self-resetting spring diaphragm on the outer side of the rotating steel ball. The self-resetting spring diaphragm is detachably connected to the fixed chuck and the movable chuck.
[0008] As a preferred embodiment of this utility model, the self-resetting spring diaphragm is provided with multiple insertion holes at the corners, and the insertion holes are respectively provided with fixed end bolts connected to one side of the fixed clamp and movable end bolts connected to one side of the movable clamp.
[0009] As a preferred embodiment of this utility model, the inner side of the fixed clamp is provided with a spherical curved surface one, the inner side of the movable clamp is provided with a spherical curved surface two, and the end face of the rotating steel ball is respectively attached to the spherical curved surface one and the spherical curved surface two.
[0010] In a preferred embodiment of this utility model, the fixed end bolt and the movable end bolt are intermittently distributed within the insertion hole.
[0011] As a preferred embodiment of this utility model, the inner side of the fixed clamp is provided with a plurality of bolt holes I that are adapted to the fixed end bolts, and the inner side of the movable clamp is provided with a plurality of bolt holes II that are adapted to the movable end bolts.
[0012] As a preferred embodiment of this utility model, the outer side of the movable chuck is provided with a plurality of clamping protrusions for clamping the silicon block.
[0013] In a preferred embodiment of this utility model, the self-resetting spring diaphragm is located on the side near the movable clamp.
[0014] As a preferred embodiment of this utility model, both the first spherical surface and the second spherical surface are located at the axis of the clamp.
[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:
[0016] In this invention, by positioning the rotating ball between the fixed and movable chucks, the movable chuck can be offset at multiple angles. The rotating steel ball supports the axial force when the chucks clamp, ensuring the clamping effect. The self-resetting spring diaphragm connecting the fixed and movable chucks enables the movable chuck to automatically reset after clamping, providing buffering and power transmission, achieving self-adaptation and self-resetting functions, improving clamping accuracy, and solving quality abnormalities caused by the inclined surface of the silicon block. It can precisely adapt to the inclined surface of the silicon block, ensuring clamping accuracy, thereby reducing the size of the raw material in the preceding process and achieving the goal of reducing silicon consumption. By selecting appropriate rotating steel balls, the wear of the steel balls themselves can be used to avoid wear on the fixed and movable chucks, reducing subsequent maintenance costs. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the clamping structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the exploded structure of the clamping head of this utility model;
[0019] Figure 3 This is a schematic diagram of the self-resetting spring diaphragm structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the rotating steel ball position structure of this utility model.
[0021] Explanation of reference numerals in the attached diagram: 1. Silicon block; 2. Fixed chuck; 201. Spherical surface one; 202. Bolt hole one; 3. Movable chuck; 301. Bolt hole two; 302. Spherical surface two; 4. Self-resetting spring diaphragm; 401. Fixed end bolt; 402. Movable end bolt; 403. Insertion hole; 5. Rotating steel ball; 6. Clamping protrusion. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.
[0023] This utility model provides, for example Figure 1-4 The fixture shown includes a fixed chuck 2 fixedly mounted on one side of a motor reducer. A movable chuck 3 is provided on one side of the fixed chuck 2. A rotating steel ball 5 is rotatably connected between the fixed chuck 2 and the movable chuck 3. A self-resetting spring diaphragm 4 is provided on the outer side of the rotating steel ball 5. The self-resetting spring diaphragm 4 is detachably connected to both the fixed chuck 2 and the movable chuck 3. The self-resetting spring diaphragm 4 is connected to the fixed chuck 2 and the movable chuck 3 by multiple bolts in different directions. When the end face of the silicon block 1 is tilted to one side, the movable chuck 3 tilts to one side after clamping it, causing the self-resetting spring diaphragm 4 to tilt to one side. When the movable chuck 3 separates from the silicon block 1, the self-resetting spring diaphragm 4 resets, driving the movable chuck 3 to reset as well, ensuring the adaptability of the chuck.
[0024] The self-resetting spring diaphragm 4 has multiple insertion holes 403 at its corners. Each insertion hole 403 contains a fixed end bolt 401 connected to one side of the fixed clamp 2 and a movable end bolt 402 connected to one side of the movable clamp 3. The insertion holes at the corners reduce the stress on the self-resetting spring diaphragm during bending, facilitating its reset.
[0025] The fixed chuck 2 has a spherical curved surface 201 on its inner side, and the movable chuck 3 has a spherical curved surface 302 on its inner side. The end face of the rotating steel ball 5 is respectively in contact with the spherical curved surface 201 and the spherical curved surface 302. By having the spherical curved surfaces in contact with the rotating steel ball 5, radial force can be evenly borne, while the coefficient of friction can be reduced.
[0026] The fixed end bolt 401 and the movable end bolt 402 are intermittently distributed within the insertion hole 403. This intermittent distribution evenly disperses the stress borne by the self-resetting spring diaphragm 4 during bending, facilitating the subsequent reset of the self-resetting spring diaphragm 4.
[0027] The inner side of the fixed clamp 2 has multiple bolt holes 202 that are adapted to the fixed end bolt 401, and the inner side of the movable clamp 3 has multiple bolt holes 301 that are adapted to the movable end bolt 402. All bolt holes are located on the outer side of the rotating steel ball 5, which effectively prevents the rotating steel ball 5 from falling off after bolt connection.
[0028] The movable chuck 3 has multiple clamping protrusions 6 on its outer side for clamping the silicon block 1. The end faces of the clamping protrusions 6 are flush, and the ends are made of anti-slip material, such as rubber, to ensure the clamping effect.
[0029] The self-resetting spring diaphragm 4 is located on the side close to the movable clamp 3. This achieves physical separation between the self-resetting spring diaphragm 4 and moving parts such as the rotating steel ball 5, preventing metal wear particles from entering the elastic element and protecting the self-resetting spring diaphragm 4.
[0030] Both spherical surfaces 201 and 302 are located at the axis of the chuck. The coaxial arrangement of the two contact spherical surfaces ensures that the externally applied clamping force or workpiece reaction force is always transmitted along the chuck axis, automatically compensating for workpiece installation deviations or system assembly errors.
[0031] This invention, by positioning a rotating ball between the fixed chuck 2 and the movable chuck 3, enables the movable chuck 3 to shift at multiple angles. The rotating ball supports the axial force when the chuck is clamping, ensuring the clamping effect. The self-resetting spring diaphragm 4 connects the fixed chuck 2 and the movable chuck 3, enabling the movable chuck 3 to automatically reset after clamping, serving as a buffer and power transmission mechanism, achieving self-adaptation and self-resetting functions, improving clamping accuracy, and solving quality abnormalities caused by the inclined surface of the silicon block 1. It can accurately adapt to the inclined surface of the silicon block 1, ensuring clamping accuracy, thereby reducing the size of the raw material in the previous process and achieving the goal of reducing silicon consumption.
[0032] By selecting the appropriate rotating steel ball 5, the wear of the fixed chuck 2 and the movable chuck 3 can be avoided by utilizing the active wear of the steel ball itself, thereby reducing subsequent maintenance costs.
[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A fixture for use in CNC machine tools, characterized in that: It includes a fixed chuck (2) fixedly installed on one side of the motor reducer, a movable chuck (3) is provided on one side of the fixed chuck (2), a rotating steel ball (5) is rotatably connected between the fixed chuck (2) and the movable chuck (3), a self-resetting spring diaphragm (4) is provided on the outside of the rotating steel ball (5), and the self-resetting spring diaphragm (4) is detachably connected to the fixed chuck (2) and the movable chuck (3) respectively.
2. The fixture for use in CNC machine tools according to claim 1, characterized in that: The self-resetting spring diaphragm (4) has multiple insertion holes (403) at its corners. The insertion holes (403) are respectively provided with a fixed end bolt (401) connected to one side of the fixed clamp (2) and a movable end bolt (402) connected to one side of the movable clamp (3).
3. A fixture for use in CNC machine tools according to claim 2, characterized in that: The fixed clamp (2) has a spherical curved surface one (201) on its inner side, and the movable clamp (3) has a spherical curved surface two (302) on its inner side. The end face of the rotating steel ball (5) is respectively attached to the spherical curved surface one (201) and the spherical curved surface two (302).
4. A fixture for use in CNC machine tools according to claim 2, characterized in that: The fixed end bolt (401) and the movable end bolt (402) are intermittently distributed in the insertion hole (403).
5. A fixture for use in CNC machine tools according to claim 4, characterized in that: The inner side of the fixed clamp (2) is provided with a plurality of bolt holes 1 (202) that are adapted to the fixed end bolt (401), and the inner side of the movable clamp (3) is provided with a plurality of bolt holes 2 (301) that are adapted to the movable end bolt (402).
6. A fixture for use in CNC machine tools according to claim 1, characterized in that: The outer side of the movable chuck (3) is provided with a plurality of clamping protrusions (6) for clamping the silicon block (1).
7. A fixture for use in CNC machine tools according to claim 1, characterized in that: The self-resetting spring diaphragm (4) is located on the side near the movable clamp (3).
8. A fixture for use in CNC machine tools according to claim 3, characterized in that: Both the first spherical surface (201) and the second spherical surface (302) are located at the axis of their respective clamps.