A kind of inner cavity positioning device for numerical control machining
By designing the mounting support, movable positioning component, positioning drive component, and positioning feedback component of the internal cavity positioning device, the problems of inaccurate workpiece positioning and movement were solved, ensuring the positioning accuracy and machining accuracy of the workpiece.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU SUNWAY PRECISION FORGING
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-24
AI Technical Summary
Existing internal cavity positioning devices cannot automatically indicate that the workpiece is not in the accurate position, and the workpiece is prone to movement during the positioning process, affecting machining accuracy.
An internal cavity positioning device was designed, comprising a mounting support, a movable positioning component, a positioning drive component, and a positioning feedback component. Through the cooperation of a positioning detection ring and a position detection rod, the device automatically indicates the workpiece position deviation and restricts workpiece movement, thereby ensuring positioning accuracy.
It enables automatic indication of positional deviation and restriction of workpiece movement after workpiece positioning, thereby improving the positioning accuracy and machining accuracy of the workpiece.
Smart Images
Figure CN122099392B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of CNC machining technology, and more specifically, relates to an internal cavity positioning device for CNC machining. Background Technology
[0002] In CNC machining, using the internal cavity as a positioning datum can effectively ensure the relative positional accuracy of the internal and external structures of the part. Since the internal hole or internal cavity is often the key mating part of the part, using it for positioning can reduce clamping errors and ensure that the outer contour of the subsequent machining remains coaxial with the internal cavity or meets the design requirements.
[0003] The currently used internal cavity positioning devices still have the following problems: 1. They cannot automatically issue a prompt when the workpiece is not in the accurate position after positioning, resulting in positional deviation of the workpiece after positioning, which affects the machining accuracy of the workpiece; 2. During the internal cavity positioning process, the workpiece is prone to movement, and it cannot be guaranteed that the workpiece will not move during the positioning process. Summary of the Invention
[0004] This disclosure relates to an internal cavity positioning device for CNC machining, which includes a mounting support, a movable positioning component, a positioning drive component, and a positioning feedback component. When the positioning detection ring fails to move to the left simultaneously with the drive screw, the positioning detection ring automatically presses a control switch, prompting the operator to reposition the workpiece and ensuring the positioning accuracy of the workpiece. The right end of the drive screw can contact the inner ends of the two position detection rods, which limit the movement of the two position detection rods and ensure that the workpiece will not move to the right during the internal cavity positioning process. This solves the problems of not being able to automatically issue a prompt when the workpiece is not in the accurate position after positioning and not being able to guarantee that the workpiece will not move during the positioning process.
[0005] This invention provides an internal cavity positioning device for CNC machining, used for positioning a workpiece; it includes: a mounting support, a movable positioning component, a positioning drive component, and a positioning feedback component; the movable positioning component has one ring, and one ring of movable positioning components is mounted on the mounting support, and the ring of movable positioning components supports the internal cavity of the workpiece; the positioning drive component is mounted on the mounting support, and the positioning drive component drives one ring of movable positioning components; the positioning feedback component is mounted on the mounting support and the positioning drive component, and the positioning feedback component is used to provide feedback on the positioning result of the workpiece.
[0006] In at least some embodiments, the mounting support includes: a mounting support ring, a limiting ring a, and a position detection rod; the limiting ring a is fixedly mounted on the outer wall of the mounting support ring; there are two position detection rods, which are slidably mounted on the mounting support ring, and the outer ends of the two position detection rods are rounded.
[0007] In at least some embodiments, the mounting support further includes: a circular reset plate a and a reset spring; there are two circular reset plates a, and the two circular reset plates a are fixedly installed on the outside of the two position detection rods; there are two reset springs, and the two reset springs are sleeved on the outside of the two position detection rods; the outer ends of the two reset springs are fixedly connected to the mounting support ring, and the inner ends of the two reset springs are fixedly connected to the two circular reset plates a.
[0008] In at least some embodiments, the movable positioning element includes: a movable positioning block and a circular push rod; the movable positioning block is slidably mounted on the mounting support ring; the circular push rod is fixedly mounted on the inner side of the movable positioning block, and the inner end of the circular push rod is provided with a rounded corner.
[0009] In at least some embodiments, the movable positioning component further includes: a circular reset plate b and a reset spring a; the circular reset plate b is fixedly installed on the outside of the circular push rod; the reset spring a is sleeved on the outside of the circular push rod, and the outer end of the reset spring a is fixedly connected to the mounting support ring, and the inner end of the reset spring a is fixedly connected to the circular reset plate b.
[0010] In at least some embodiments, the positioning drive includes: a circular mounting base and a drive screw; the circular mounting base is fixedly mounted inside the mounting support ring; the drive screw is threaded onto the circular mounting base.
[0011] In at least some embodiments, the positioning drive further includes: a conical drive block and a limiting ring b; the conical drive block is fixedly installed on the left side of the drive screw, and the outer wall of the conical drive block is in contact with a circular push rod; the limiting ring b is fixedly installed outside the drive screw, and the limiting ring b is located on the left side of the circular mounting base.
[0012] In at least some embodiments, the positioning feedback component includes: a lithium battery, an alarm, and a circular mounting shaft; the lithium battery is fixedly mounted on the inner wall of the mounting support ring; the alarm is fixedly mounted on the inner wall of the mounting support ring; there are two circular mounting shafts, and the two circular mounting shafts are slidably mounted on the drive screw.
[0013] In at least some embodiments, the positioning feedback component further includes: a positioning detection ring and a limiting ring c; the positioning detection ring is fixedly installed on the left side of the two circular mounting shafts; there are two limiting rings c in total, and the two limiting rings c are fixedly installed on the right end of the two circular mounting shafts.
[0014] In at least some embodiments, the positioning feedback device further includes: a reset spring b and a control switch; there are two reset springs b, which are sleeved on the outside of two circular mounting shafts and located on the right side of the positioning detection ring; the control switch is installed inside the drive screw and is electrically connected to the lithium battery and the alarm, and the alarm sounds when the control switch is pressed.
[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In this invention, the installation support ring and the limiting ring a serve to install the workpiece and also to limit the left side of the workpiece, which is beneficial for the operator to control the left and right positions of the workpiece. When the workpiece is connected to or separated from the installation support ring, the workpiece can push the two position detection rods to slide inward. When the workpiece is installed in place or completely separated from the installation support ring, the two position detection rods automatically reset outward under the action of two reset springs. When the left side of the workpiece does not contact the limiting ring a after positioning, the two position detection rods cannot be completely reset due to the obstruction at the right end of the workpiece.
[0016] 2. In this invention, when the operator rotates the drive screw counterclockwise with a wrench, the drive screw causes the conical drive block to move to the right; when the operator rotates the drive screw clockwise with a wrench, the drive screw causes the conical drive block to move to the left; the setting of the limiting ring b limits the movement distance of the drive screw. In addition, when the operator turns the drive screw clockwise with a wrench, the conical drive block pushes a circular push rod and a movable positioning block outward, which supports and positions the inner cavity of the workpiece; when the operator turns the drive screw counterclockwise with a wrench, the circular push rod and the movable positioning block return to their original position under the action of a return spring a.
[0017] 3. In this invention, when the left side of the positioned workpiece does not contact the limiting ring a, the operator can turn the drive screw clockwise with a wrench, and the inner ends of the two position detection rods will automatically block the positioning detection ring, preventing it from moving to the left simultaneously with the drive screw. When the left side of the positioned workpiece contacts the limiting ring a, the operator can turn the drive screw clockwise with a wrench, and the inner ends of the two position detection rods will not block the positioning detection ring, allowing it to move to the left simultaneously with the drive screw. When the positioning detection ring cannot move to the left simultaneously with the drive screw, it automatically presses the control switch, triggering an alarm that prompts the operator to reposition the workpiece, thus ensuring the positioning accuracy of the workpiece. In addition, when the positioning detection ring moves to the left along with the drive screw, the right end of the drive screw can contact the inner ends of the two position detection rods, which plays a limiting role on the two position detection rods, ensuring that the workpiece will not move to the right during the positioning process of the workpiece cavity, thus ensuring the positioning accuracy of the workpiece. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.
[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.
[0020] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of the present invention is shown; Figure 2 The present invention is shown. Figure 1 A schematic diagram of the transverse center section structure; Figure 3 The present invention is shown. Figure 2 Schematic diagram of the cross-sectional structure along the AA direction; Figure 4 A schematic diagram of the positioning drive component of the present invention is shown; Figure 5 The present invention is shown. Figure 2 A magnified schematic diagram of a portion of region B in the middle; Figure 6 The present invention is shown. Figure 2 A magnified schematic diagram of a portion of region C in the middle; Figure 7 A schematic diagram of the mounting support ring, drive screw, and positioning feedback component of the present invention is shown. Figure 8 The present invention is shown. Figure 7 A magnified schematic diagram of a portion of region D in the middle; Figure 9 The present invention is shown. Figure 1 A schematic diagram of the longitudinal center section structure; Figure 10 The present invention is shown. Figure 9 A magnified schematic diagram of a portion of region E in the middle; Figure 11 A schematic diagram of the structure after the workpiece is positioned according to the present invention is shown.
[0021] List of reference numerals in the attached diagram: 100. Install support components; 101. Install support ring; 102. Limiting ring a; 103. Position detection rod; 104. Circular reset plate a; 105. Reset tension spring; 200. Movable positioning component; 201. Movable positioning block; 202. Circular push rod; 203. Circular reset plate b; 204. Reset spring a; 300. Positioning drive component; 301. Circular mounting base; 302. Drive screw; 303. Conical drive block; 304. Limiting ring b; 400. Positioning feedback component; 401. Lithium battery; 402. Alarm; 403. Circular mounting shaft; 404. Positioning detection ring; 405. Limiting ring c; 406. Return spring b; 407. Control switch; 500. Workpiece. Detailed Implementation
[0022] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.
[0023] Example: Please refer to Figures 1 to 11 As shown: This invention provides an internal cavity positioning device for CNC machining, comprising a mounting support 100, a movable positioning member 200, a positioning drive member 300, and a positioning feedback member 400. The movable positioning member 200 consists of a ring, which is mounted on the mounting support 100 and supports the internal cavity of the workpiece 500. The positioning drive member 300 is mounted on the mounting support 100 and drives the ring of movable positioning members 200. The positioning feedback member 400 is mounted on the mounting support 100 and the positioning drive member 300 and provides feedback on the positioning result of the workpiece 500.
[0024] In this embodiment of the disclosure, such as Figure 1 and Figure 6As shown, the mounting support 100 includes: a mounting support ring 101, a limiting ring a102, and position detection rods 103; the limiting ring a102 is fixedly installed on the outer wall of the mounting support ring 101; two position detection rods 103 are provided, and the two position detection rods 103 are slidably installed on the mounting support ring 101, and the outer ends of the two position detection rods 103 are rounded; the mounting support 100 also includes: a circular reset plate a104 and a reset spring 105; two circular reset plates a104 are provided, and the two circular reset plates a104 are fixedly installed on the outside of the two position detection rods 103; two reset springs 105 are provided, and the two reset springs 105 are sleeved on the outside of the two position detection rods 103; the outer ends of the two reset springs 105 are fixedly connected to the mounting support ring 101, and the inner ends of the two reset springs 105 are fixedly connected to the two circular reset plates a104; The specific functions of the mounting support 100 are as follows: Because the limiting ring a102 is fixedly installed on the outer wall of the mounting support ring 101, it serves to install the workpiece 500 and also limits the left side of the workpiece 500, which is beneficial for operators to control the left and right positions of the workpiece 500. Furthermore, because the outer ends of the two position detection rods 103 are rounded, and the outer ends of the two reset springs 105 are fixedly connected to the mounting support ring 101, and the inner ends of the two reset springs 105 are fixedly connected to the two circular reset plates a104, when the workpiece 500 is in contact with the mounting support ring 101... During the connection or separation of the support ring 101, the workpiece 500 can push the two position detection rods 103 to slide inward; when the workpiece 500 is installed in place or completely separated from the mounting support ring 101, the two position detection rods 103 automatically reset outward under the action of the two reset springs 105; when the left side of the workpiece 500 does not contact the limiting ring a102 after positioning (there are metal fragments or other debris between the left side of the workpiece 500 and the limiting ring a102), the two position detection rods 103 cannot be completely reset due to the obstruction at the right end of the workpiece 500.
[0025] In this embodiment of the disclosure, such as Figures 3 to 5 As shown, the movable positioning component 200 includes: a movable positioning block 201 and a circular push rod 202; the movable positioning block 201 is slidably mounted on the mounting support ring 101; the circular push rod 202 is fixedly mounted on the inner side of the movable positioning block 201, and the inner end of the circular push rod 202 is provided with a rounded corner; the movable positioning component 200 also includes: a circular reset plate b203 and a reset spring a204; the circular reset plate b203 is fixedly mounted on the outside of the circular push rod 202; the reset spring a204 is sleeved on the outside of the circular push rod 202, and the outer end of the reset spring a204 is fixedly connected to the mounting support ring 101, and the inner end of the reset spring a204 is fixedly connected to the circular reset plate b203; The positioning drive component 300 includes: a circular mounting base 301 and a drive screw 302; the circular mounting base 301 is fixedly installed inside the mounting support ring 101; the drive screw 302 is threadedly connected to the circular mounting base 301; the positioning drive component 300 also includes: a conical drive block 303 and a limiting ring b304; the conical drive block 303 is fixedly installed on the left side of the drive screw 302, and the outer wall of the conical drive block 303 contacts a circular push rod 202; the limiting ring b304 is fixedly installed on the outside of the drive screw 302, and the limiting ring b304 is located on the left side of the circular mounting base 301; The specific functions of the movable positioning component 200 and the positioning drive component 300 are as follows: Since the drive screw 302 is threadedly connected to the circular mounting base 301, and the conical drive block 303 is fixedly installed on the left side of the drive screw 302, when the operator rotates the drive screw 302 counterclockwise with a wrench, the drive screw 302 drives the conical drive block 303 to move to the right; when the operator rotates the drive screw 302 clockwise with a wrench, the drive screw 302 drives the conical drive block 303 to move to the left; and since the limiting ring b304 is fixedly installed on the outside of the drive screw 302, and the limiting ring b304 is located on the left side of the circular mounting base 301, it limits the movement distance of the drive screw 302. Furthermore, since a movable positioning block 201 is slidably mounted on the mounting support ring 101, and a circular push rod 202 is fixedly mounted on the inner side of the movable positioning block 201, and the outer wall of the conical drive block 303 is in contact with the circular push rod 202, when the operator rotates the drive screw 302 clockwise with a wrench, the conical drive block 303 pushes the circular push rod 202 and the movable positioning block 201 outwards, thus providing support and positioning for the inner cavity of the workpiece 500. Also, since a return spring a204 is sleeved on the outside of the circular push rod 202, and the outer end of the return spring a204 is fixedly connected to the mounting support ring 101, and the inner end of the return spring a204 is fixedly connected to the circular return plate b203, when the operator rotates the drive screw 302 counterclockwise with a wrench, the circular push rod 202 and the movable positioning block 201 return inwards under the action of the return spring a204.
[0026] In this embodiment of the disclosure, such as Figures 6 to 8 , Figure 10As shown, the positioning feedback component 400 includes: a lithium battery 401, an alarm 402, and a circular mounting shaft 403; the lithium battery 401 is fixedly installed on the inner wall of the mounting support ring 101; the alarm 402 is fixedly installed on the inner wall of the mounting support ring 101; two circular mounting shafts 403 are provided, and the two circular mounting shafts 403 are slidably installed on the drive screw 302; the positioning feedback component 400 also includes: a positioning detection ring 404 and a limiting ring c405; the positioning detection ring 404 is fixedly installed on the left side of the two circular mounting shafts 403; two limiting rings c405 are provided, and the two limiting rings c405 are slidably installed on the left side of the two circular mounting shafts 403. The positioning ring c405 is fixedly installed on the right end of the two circular mounting shafts 403; the positioning feedback component 400 also includes: a reset spring b406 and a control switch 407; there are two reset springs b406, and the two reset springs b406 are sleeved on the outside of the two circular mounting shafts 403, and the two reset springs b406 are located on the right side of the positioning detection ring 404; the control switch 407 is installed inside the drive screw 302, and the control switch 407 is electrically connected to the lithium battery 401 and the alarm 402. When the control switch 407 is in the pressed state, the alarm 402 sounds an alarm. The specific function of the positioning feedback component 400 is as follows: Because the positioning detection ring 404 is fixedly installed on the left side of the two circular mounting shafts 403, and the two return springs b406 are sleeved on the outside of the two circular mounting shafts 403, and the two return springs b406 are located on the right side of the positioning detection ring 404, when the left side of the positioned workpiece 500 is not in contact with the limiting ring a102 (there are metal fragments or other debris between the left side of the workpiece 500 and the limiting ring a102), after the operator turns the drive screw 302 clockwise with a wrench, the inner ends of the two position detection rods 103 automatically block the positioning detection ring 404, so that the positioning detection ring 404 cannot move to the left simultaneously with the drive screw 302; when the positioned workpiece 500 is not in contact with the limiting ring a102 (there are metal fragments or other debris between the left side of the workpiece 500 and the limiting ring a102), the positioning feedback component 400 can automatically block the positioning detection ring 404. When the left side of workpiece 500 contacts the limiting ring a102, the operator can turn the drive screw 302 clockwise with a wrench. The inner ends of the two position detection rods 103 cannot block the positioning detection ring 404, allowing the positioning detection ring 404 to move to the left simultaneously with the drive screw 302. Since the control switch 407 is installed inside the drive screw 302 and is electrically connected to the lithium battery 401 and the alarm 402, when the positioning detection ring 404 cannot move to the left simultaneously with the drive screw 302, the positioning detection ring 404 automatically presses the control switch 407. At this time, the alarm 402 sounds an alarm, prompting the operator to reposition workpiece 500, thus ensuring the positioning accuracy of workpiece 500. In addition, when the positioning detection ring 404 moves to the left along with the drive screw 302, the right end of the drive screw 302 can contact the inner ends of the two position detection rods 103, which plays a limiting role on the two position detection rods 103, ensuring that the workpiece 500 will not move to the right during the positioning process of the inner cavity of the workpiece 500, thus ensuring the positioning accuracy of the workpiece 500.
[0027] The specific usage and function of this embodiment are as follows: In use, the left end of the mounting support ring 101 is first connected to the chuck of the CNC lathe, and then the workpiece 500 to be processed is mounted on the outside of the mounting support ring 101, so that the left side of the workpiece 500 contacts the limiting ring a102; when the workpiece 500 is connected to or separated from the mounting support ring 101, the workpiece 500 can push the two position detection rods 103 to slide inward; when the workpiece 500 is installed in place or completely separated from the mounting support ring 101, the two position detection rods 103 automatically reset outward under the action of the two reset springs 105; when the workpiece 500 is positioned... When the left side of workpiece 500 does not contact the limiting ring a102, the two position detection rods 103 cannot be fully reset due to the obstruction at the right end of workpiece 500. The operator rotates the drive screw 302 clockwise with a wrench. At this time, the drive screw 302 drives the conical drive block 303 to move to the left. When the operator rotates the drive screw 302 clockwise with a wrench, the conical drive block 303 pushes a circular push rod 202 and a movable positioning block 201 outwards, providing support and positioning for the inner cavity of workpiece 500. After positioning, the left side of workpiece 500 does not contact the limiting ring a102. When contact occurs, after the operator rotates the drive screw 302 clockwise with a wrench, the inner ends of the two position detection rods 103 automatically block the positioning detection ring 404, preventing the positioning detection ring 404 from moving to the left simultaneously with the drive screw 302. When the left side of the positioned workpiece 500 contacts the limit ring a102, after the operator rotates the drive screw 302 clockwise with a wrench, the inner ends of the two position detection rods 103 can no longer block the positioning detection ring 404, allowing the positioning detection ring 404 to move to the left simultaneously with the drive screw 302. When the positioning detection ring 404 cannot move to the left simultaneously with the drive screw 302, the inner ends of the two position detection rods 103 can no longer block the positioning detection ring 404. When the drive screw 302 moves to the left, the positioning detection ring 404 automatically presses the control switch 407. At this time, the alarm 402 sounds an alarm, prompting the operator to reposition the workpiece 500, thus ensuring the positioning accuracy of the workpiece 500. When the positioning detection ring 404 moves to the left along with the drive screw 302, the right end of the drive screw 302 can contact the inner ends of the two position detection rods 103, which limit the two position detection rods 103 and ensure that the workpiece 500 will not move to the right during the positioning process of the inner cavity of the workpiece 500, thus ensuring the positioning accuracy of the workpiece 500. When the processed workpiece 500 needs to be removed, the operator turns the drive screw 302 counterclockwise with a wrench. At this time, the drive screw 302 drives the conical drive block 303 to move to the right. When the operator turns the drive screw 302 counterclockwise with a wrench, a circular push rod 202 and a movable positioning block 201 are reset inward under the action of a return spring a204. Then the operator removes the processed workpiece 500.
[0028] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.
[0029] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.
[0030] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.
Claims
1. An internal cavity positioning device for CNC machining, used for positioning a workpiece (500); comprising: The system comprises a mounting support (100), a movable positioning component (200), a positioning drive component (300), and a positioning feedback component (400); characterized in that the movable positioning component (200) has a ring, and the ring of movable positioning components (200) is mounted on the mounting support (100), and the ring of movable positioning components (200) is used to support the inner cavity of the workpiece (500); the positioning drive component (300) is mounted on the mounting support (100), and the positioning drive component (300) is used to drive the ring of movable positioning components (200); the positioning feedback component (400) is mounted on the mounting support (100) and the positioning drive component (300), and the positioning feedback component (400) is used to provide feedback on the positioning result of the workpiece (500); the mounting support (100) includes: a mounting support ring (101), a limiting ring a (102), and a position detection rod (103); the limiting ring a (102) is used to provide feedback on the positioning result of the workpiece (500); the mounting support (100) includes: a mounting support ring (101), a limiting ring a (102), and a position detection rod a (103); the limiting ring a (102) is used to provide feedback on the positioning result of the workpiece (500). a (102) is fixedly installed on the outer wall of the mounting support ring (101); there are two position detection rods (103), and the two position detection rods (103) are slidably installed on the mounting support ring (101), and the outer ends of the two position detection rods (103) are rounded; the mounting support (100) also includes: a circular reset plate a (104) and a reset spring (105); there are two circular reset plates a (104), and the two circular reset plates a (104) are fixedly installed on the outside of the two position detection rods (103); there are two reset springs (105), and the two reset springs (105) are sleeved on the outside of the two position detection rods (103); the outer ends of the two reset springs (105) are fixedly connected to the mounting support ring (101), and the inner ends of the two reset springs (105) are fixedly connected to the two circular reset plates a (104); The positioning drive component (300) includes a drive screw (302); the positioning feedback component (400) includes a lithium battery (401), an alarm (402), and a circular mounting shaft (403); the lithium battery (401) is fixedly installed on the inner wall of the mounting support ring (101); the alarm (402) is fixedly installed on the inner wall of the mounting support ring (101); there are two circular mounting shafts (403), and the two circular mounting shafts (403) are slidably installed on the drive screw (302); the positioning feedback component (400) further includes a positioning detection ring (404) and a limiting ring c (405); the positioning detection ring (404) is fixedly installed on the left side of the two circular mounting shafts (403); there are two limiting rings c (405), and the two limiting rings c (405) are fixedly installed on the inner wall of the mounting support ring (101); At the right end of the two circular mounting shafts (403); the positioning feedback component (400) further includes: a reset spring b (406) and a control switch (407); there are two reset springs b (406), and the two reset springs b (406) are sleeved on the outside of the two circular mounting shafts (403), and the two reset springs b (406) are located on the right side of the positioning detection ring (404); the control switch (407) is installed inside the drive screw (302), and the control switch (407) is electrically connected to the lithium battery (401) and the alarm (402); when the positioning detection ring (404) cannot move to the left simultaneously with the drive screw (302), the positioning detection ring (404) automatically presses the control switch (407), and when the control switch (407) is in the pressed state, the alarm (402) sounds an alarm.
2. The internal cavity positioning device for CNC machining according to claim 1, characterized in that, The movable positioning component (200) includes: a movable positioning block (201) and a circular push rod (202); the movable positioning block (201) is slidably mounted on the mounting support ring (101); the circular push rod (202) is fixedly mounted on the inner side of the movable positioning block (201), and the inner end of the circular push rod (202) is provided with a rounded corner.
3. The internal cavity positioning device for CNC machining according to claim 2, characterized in that, The movable positioning component (200) further includes: a circular reset plate b (203) and a reset spring a (204); the circular reset plate b (203) is fixedly installed on the outside of the circular push rod (202); the reset spring a (204) is sleeved on the outside of the circular push rod (202), and the outer end of the reset spring a (204) is fixedly connected to the mounting support ring (101), and the inner end of the reset spring a (204) is fixedly connected to the circular reset plate b (203).
4. The internal cavity positioning device for CNC machining according to claim 2, characterized in that, The positioning drive (300) further includes: a circular mounting base (301); the circular mounting base (301) is fixedly installed inside the mounting support ring (101); the drive screw (302) is threaded onto the circular mounting base (301).
5. The internal cavity positioning device for CNC machining according to claim 4, characterized in that, The positioning drive component (300) further includes: a conical drive block (303) and a limiting ring b (304); the conical drive block (303) is fixedly installed on the left side of the drive screw (302), and the outer wall of the conical drive block (303) is in contact with a circular push rod (202); the limiting ring b (304) is fixedly installed on the outside of the drive screw (302), and the limiting ring b (304) is located on the left side of the circular mounting base (301).