Supporting device for high-precision numerical control machining
By designing a sliding rotating ring and a support rod structure for the support components, combined with telescopic springs and steel balls, the problem of the center frame being difficult to quickly match the stepped clamping in the existing technology is solved. This achieves automatic centering and lubrication to reduce friction, thereby improving the processing efficiency and accuracy of long shaft parts.
Patent Information
- Application Number
- CN202520574671.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-31
AI Technical Summary
Existing center frame clamping devices are difficult to quickly match the clamping positions of different steps, requiring repeated manual adjustments, resulting in long processing time, high manual labor intensity, and easy occurrence of processing eccentricity problems.
It adopts a sliding rotating ring and support assembly, combined with a telescopic spring and steel ball structure, to achieve automatic centering and reduce friction. The frictional resistance is reduced by lubricating oil, the support rod can adjust the clamping position, and the support assembly automatically positions the workpiece.
It enables rapid adjustment of clamping position, automatic centering, reduces processing time and manual labor intensity, reduces workpiece wear, and improves processing accuracy and stability.
Smart Images
Figure CN223917324U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of CNC machining tooling technology, specifically a support device for high-precision CNC machining. Background Technology
[0002] In the field of CNC machining, the machining of long shaft parts is a common type of part in mechanical manufacturing. In the machining process of such parts, additional fixtures are required to improve the rigidity of the workpiece during turning, thereby improving the accuracy of the workpiece clamping and positioning device. In the machining process of such parts, the common additional fixture is usually a center rest, which is positioned between the fixture and the tailstock, and the center rest is in contact with the part, thereby enhancing the rigidity of the part.
[0003] In existing technologies, conventional center rest clamping devices mostly adopt fixed support structures or manual adjustment mechanisms. When dealing with long shaft parts with stepped shaft features, conventional center rests have difficulty quickly matching the clamping positions of different stepped sections. Manual adjustment of the clamping components is required repeatedly, which not only increases the processing time of long shaft parts but also increases the labor intensity of workers. At the same time, most center rest clamping devices cannot achieve automatic centering during clamping and rely on manual work experience to adjust the workpiece axis, which is prone to processing eccentricity problems. Utility Model Content
[0004] In view of the technical problems mentioned above, this utility model proposes the following technical solution:
[0005] A support device for high-precision CNC machining includes a lower outer shell, on which a main support plate is fixedly mounted for connection to a machine tool track. The device is characterized by: a rotating shell with protective function slidably mounted on the lower outer shell; a fixed ring fixedly mounted inside the lower outer shell; a rotating ring slidably mounted on the fixed ring; the rotating ring being fixedly connected to the rotating shell; and a closed loop formed when both ends of the rotating ring simultaneously contact the fixed ring. Multiple support components for limiting the workpiece position are provided on the closed loop.
[0006] Furthermore, the support assembly includes a support frame, which is fixedly connected to a rotating ring. A support rod for support is slidably installed inside the support frame. The support rod is provided with a limit slot. A small telescopic tube is also fixedly installed at one end of the support rod. The small telescopic tube is a flexible and telescopic component. A telescopic spring is fixedly installed on the support frame. The other end of the telescopic spring is fixedly connected to the support rod. The telescopic spring is used to allow the support rod to move toward the workpiece axis. A steel ball is provided at the end of the support rod away from the support frame. The steel ball is used to contact the outer surface of the workpiece.
[0007] Furthermore, a liquid storage tank is fixedly installed on the main support plate, a left oil pipe is fixedly installed on one side of the liquid storage tank, a right oil pipe is fixedly installed on the other side of the liquid storage tank, and a large telescopic pipe is fixedly installed at the end of the left oil pipe away from the liquid storage tank. The large telescopic pipe is a retractable component, and one end of the large telescopic pipe is connected to a small telescopic pipe installed in the support assembly on the rotating ring.
[0008] Furthermore, a pull frame is slidably mounted on the main support plate, and a limit handle is fixedly mounted on one side of the pull frame. One end of the limit handle is located on the outside of the lower housing, and the limit handle is slidably connected to the lower housing. A limit spring is fixedly mounted on the pull frame, and the other end of the limit spring is fixedly mounted on the main support plate. The limit spring is used to allow the pull frame and the limit handle to return to their initial state.
[0009] Furthermore, a lower limit frame is fixedly installed on the pulling frame, and an upper limit frame is slidably installed on the lower limit frame. The upper limit frame and the lower limit frame form a three-quarter arc. The upper limit frame is also provided with a protruding locking block, which fits into the limiting slot on the support rod. The protruding locking block on the upper limit frame is used to restrict the movement of the support rod in the support assembly on the rotating ring. Two protruding locking blocks are simultaneously provided on the lower limit frame to restrict the movement of the support rod in the two support assemblies on the fixed ring.
[0010] Furthermore, the rotating ring is fixedly connected to any one of the support components, the fixed ring is fixedly connected to any two support components, and the included angle between the plurality of support components is 120 degrees.
[0011] The beneficial effects of this utility model compared with the prior art are: (1) When the workpiece is clamped, the device can quickly adjust the clamping position by restricting and not restricting the movement of the support rod, and can quickly position and clamp the long shaft with stepped shaft, thereby reducing the processing time of the workpiece. At the same time, the device can achieve automatic centering effect by cooperating with the support rod and the telescopic spring; (2) When the workpiece is rotating, the device reduces the friction on the workpiece by the steel ball and the lubricating oil stored in the liquid tank, which can not only reduce the wear of the support component, but also prevent the support component from damaging the outer surface of the workpiece. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0013] Figure 2 This is a cross-sectional structural diagram of the lower outer shell, rotating shell, and main support plate of this utility model.
[0014] Figure 3 This is a schematic diagram of the large telescopic tube structure of this utility model.
[0015] Figure 4 This is a schematic diagram of the upper limit frame structure of this utility model.
[0016] Figure 5 for Figure 4 A partial schematic diagram of point A in the middle.
[0017] Figure 6 This is a schematic diagram of the support rod structure of this utility model.
[0018] Figure 7 This is a cross-sectional structural diagram of the support frame, support rod, small telescopic tube, and telescopic spring of this utility model.
[0019] Figure 8 This is a cross-sectional structural diagram of the lower outer shell and rotating shell of this utility model.
[0020] Reference numerals: 101-Lower outer shell, 102-Rotating shell, 103-Workpiece, 104-Main support plate, 105-Reservoir tank, 106-Left oil pipe, 107-Large telescopic pipe, 108-Right oil pipe, 201-Fixing ring, 202-Rotating ring, 203-Upper limit frame, 204-Lower limit frame, 205-Pull frame, 206-Limit spring, 207-Limit handle, 301-Support frame, 302-Support rod, 303-Small telescopic pipe, 304-Telescopic spring, 305-Steel ball. Detailed Implementation
[0021] like Figure 1 and Figure 2 As shown, a support device for high-precision CNC machining includes a lower outer shell 101, on which a main support plate 104 is fixedly installed. The main support plate 104 is used to connect with the machine tool track. A rotating shell 102 with protective function is slidably installed on the lower outer shell 101. When the rotating shell 102 and the lower outer shell 101 are closed, they form a circular inner cavity, in which the workpiece 103 is placed. A rotating handle is provided on the outer wall of the rotating shell 102.
[0022] like Figures 1 to 4 and Figure 6As shown, a fixed ring 201 is fixedly installed inside the lower outer shell 101, and a rotating ring 202 is slidably installed on the fixed ring 201. The rotating ring 202 is fixedly connected to the rotating shell 102. When both ends of the rotating ring 202 are in contact with the fixed ring 201, a closed ring is formed. Multiple support components for limiting the position of the workpiece 103 are provided on the closed ring. The rotating ring 202 is fixedly connected to any one support component, and the fixed ring 201 is fixedly connected to any two support components. The included angle between the three support components is 120 degrees. When the rotating shell 102 is opened, the rotating shell 102, the rotating ring 202, and the support components on the rotating ring 202 only need to be rotated 90 degrees to clamp the workpiece 103. After the workpiece 103 is clamped onto the machine tool, the fixed ring 201 and the rotating ring 202 are returned to their initial positions. At this time, the three support components on this device can support the workpiece 103, ensuring that the workpiece 103 will not shift due to force or vibration during the processing, thereby ensuring processing accuracy.
[0023] like Figures 4 to 7 As shown, the support assembly includes a support frame 301, which is fixedly connected to a rotating ring 202. A support rod 302 for support is slidably installed inside the support frame 301. The support rod 302 is provided with a limit groove. A small telescopic tube 303 is also fixedly installed at one end of the support rod 302. The small telescopic tube 303 is a flexible and telescopic component. A telescopic spring 304 is fixedly installed on the support frame 301. The other end of the telescopic spring 304 is fixedly connected to the support rod 302. The telescopic spring 304 is used to allow the support rod 302 to move toward the axis of the workpiece 103. Figure 2 The telescopic spring 304 shown is in a compressed state. In this state, if the support rod 302 is not restricted, the support rod 302 will move toward the axis of the workpiece 103. A steel ball 305 is provided at the end of the support rod 302 away from the support frame 301. The steel ball 305 is used to contact the outer surface of the workpiece 103. The steel ball 305 is used to isolate the contact between the support rod 302 and the workpiece 103, and at the same time minimize the resistance of the workpiece 103 when rotating.
[0024] like Figures 2 to 4As shown, a liquid storage tank 105 is fixedly installed on the main support plate 104. A left oil pipe 106 is fixedly installed on one side of the liquid storage tank 105, and a right oil pipe 108 is fixedly installed on the other side of the liquid storage tank 105. A large telescopic pipe 107 is fixedly installed at the end of the left oil pipe 106 away from the liquid storage tank 105. The large telescopic pipe 107 is a retractable component. One end of the large telescopic pipe 107 is connected to a small telescopic pipe 303 installed in the support assembly on the rotating ring 202, so that the liquid in the liquid storage tank 105 can be... The lubricating oil enters the support rod 302 after passing through the large telescopic tube 107, which reduces the frictional resistance between the steel ball 305 and the support rod 302, and further reduces the wear of the steel ball 305. The small telescopic tube 303 of the two support components installed on the fixed ring 201 is connected to the left oil pipe 106 and the right oil pipe 108 respectively, which facilitates the input of lubricating oil. When the rotating shell 102 and the fixed ring 201 rotate, the large telescopic tube 107 retracts during the rotation.
[0025] like Figures 2 to 8As shown, a pull frame 205 is slidably mounted on the main support plate 104. A limit handle 207 is fixedly mounted on one side of the pull frame 205. One end of the limit handle 207 is located on the outside of the lower outer shell 101, and the limit handle 207 is slidably connected to the lower outer shell 101. A limit spring 206 is fixedly mounted on the pull frame 205, and the other end of the limit spring 206 is fixedly mounted on the main support plate 104. The limit spring 206 is used to return the pull frame 205 and the limit handle 207 to their initial state. A lower limit frame 204 is fixedly mounted on the pull frame 205, and an upper limit frame 204 is slidably mounted on the lower limit frame 204. 03. The upper limit bracket 203 and the lower limit bracket 204 form a three-quarters arc. The upper limit bracket 203 is also provided with a protruding locking block, which fits into the limiting slot on the support rod 302. The protruding locking block on the upper limit bracket 203 is used to restrict the movement of the support rod 302 in the support assembly on the rotating ring 202. The lower limit bracket 204 is simultaneously provided with two protruding locking blocks to restrict the movement of the support rod 302 in the two support assemblies on the fixed ring 201. During operation, if a new workpiece 103 is to be clamped, the limiting handle 207 needs to be manually pulled to drive the lower limit bracket 204 and the upper limit bracket 204. The limiting bracket 203 moves away from the rotating ring 202, allowing the protruding blocks on the lower limiting bracket 204 and upper limiting bracket 203 to disengage from the limiting slots in all support components. Once the protruding blocks disengage from the limiting slots, the support rod 302 is no longer restricted, and the telescopic spring 304 on the support rod 302 returns to its natural state. When clamping the workpiece 103, the workpiece 103 can press against any one of the support rods 302 and the steel ball 305, facilitating the clamping of the workpiece 103. Furthermore, after clamping, if the workpiece 103 has a stepped shaft, the device only needs to be slid along the machine tool slide rail to any position... On the outer wall of a stepped shaft of different diameters, the telescopic spring 304 will make the steel ball 305 make close contact with the outer wall of the workpiece 103. In this way, regardless of the diameter of the workpiece 103, this device can be used for center positioning. During the positioning process, it is not necessary to adjust each support component. After the contact position between the steel ball 305 and the outer wall of the workpiece 103 is confirmed, the limit handle 207 can be released, allowing the limit handle 207 to return to the initial position through the limit spring 206. Then, the lower limit frame 204 and the upper limit frame 203 will restrict the support rod 302 through the protruding locking block. At this time, the machine tool can be started to process the workpiece 103.
[0026] When the workpiece 103 rotates, the steel ball 305 will be driven to rotate as well. At this time, the oil in the reservoir 105 will enter each support assembly through the left oil pipe 106, the large telescopic pipe 107, and the right oil pipe 108, thereby reducing the friction between the steel ball 305 and the support rod 302 in each support assembly. It should be noted that during the machining of the workpiece 103, this device needs to be fixed on the lathe slide rail. This fixing method can be achieved by bolts, fasteners, or external fixing devices in the prior art. However, when fixing, it is necessary to ensure that this device is in close contact with the lathe slide rail. It is also necessary to note that the axis of the lathe three-jaw chuck coincides with the axis of the circular inner cavity in this device; otherwise, the support will be unstable.
Claims
1. A high-precision numerical control machining support device, comprising a lower shell (101), a workpiece (103), and a main support plate (104) fixedly installed on the lower shell (101), wherein the main support plate (104) is connected with a machine tool rail, characterized in that: A protective rotating shell (102) is slidably mounted on the lower outer shell (101). A fixed ring (201) is fixedly mounted inside the lower outer shell (101). A rotating ring (202) is slidably mounted on the fixed ring (201). The rotating ring (202) is fixedly connected to the rotating shell (102). When both ends of the rotating ring (202) are in contact with the fixed ring (201) at the same time, a closed ring is formed. A plurality of support components for limiting the position of the workpiece (103) are provided on the closed ring. The support assembly includes a support frame (301), which is fixedly connected to a rotating ring (202). A support rod (302) for support is slidably installed inside the support frame (301). A limit slot is provided on the support rod (302). A small telescopic tube (303) is also fixedly installed at one end of the support rod (302). The small telescopic tube (303) is a flexible and telescopic component. A telescopic spring (304) is fixedly installed on the support frame (301). The other end of the telescopic spring (304) is fixedly connected to the support rod (302). The telescopic spring (304) is used to move the support rod (302) toward the axis of the workpiece (103). A steel ball (305) is provided at the end of the support rod (302) away from the support frame (301). The steel ball (305) is used to contact the outer surface of the workpiece (103).
2. The support device for high-precision numerical control machining according to claim 1, characterized in that: A liquid storage tank (105) is fixedly installed on the main support plate (104). A left oil pipe (106) is fixedly installed on one side of the liquid storage tank (105), and a right oil pipe (108) is fixedly installed on the other side of the liquid storage tank (105). A large telescopic pipe (107) is fixedly installed at the end of the left oil pipe (106) away from the liquid storage tank (105). The large telescopic pipe (107) is a retractable component. One end of the large telescopic pipe (107) is connected to a small telescopic pipe (303) installed in the support assembly on the rotating ring (202).
3. The support device for high-precision numerical control machining according to claim 1, characterized in that: A pull frame (205) is slidably mounted on the main support plate (104). A limit handle (207) is fixedly mounted on one side of the pull frame (205). One end of the limit handle (207) is located on the outside of the lower outer shell (101). The limit handle (207) is slidably connected to the lower outer shell (101). A limit spring (206) is fixedly mounted on the pull frame (205). The other end of the limit spring (206) is fixedly mounted on the main support plate (104). The limit spring (206) is used to restore the pull frame (205) and the limit handle (207) to their initial state.
4. The support device for high-precision numerical control machining according to claim 3, characterized in that: A lower limit frame (204) is fixedly installed on the pull frame (205), and an upper limit frame (203) is slidably installed on the lower limit frame (204). The upper limit frame (203) and the lower limit frame (204) form a three-quarter arc. A protruding locking block is also provided on the upper limit frame (203). The protruding locking block fits into the limiting slot on the support rod (302). The protruding locking block on the upper limit frame (203) is used to restrict the movement of the support rod (302) in the support assembly on the rotating ring (202). Two protruding locking blocks are simultaneously provided on the lower limit frame (204) to restrict the movement of the support rod (302) in the two support assemblies on the fixed ring (201).
5. The support device for high-precision numerical control machining according to claim 1, characterized in that: The rotating ring (202) is fixedly connected to any one of the support components, and the fixed ring (201) is fixedly connected to any two support components. The included angle between the multiple support components is 120 degrees.