CN209877909U - Positioning device for central axis of circular hole - Google Patents
Positioning device for central axis of circular hole Download PDFInfo
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- CN209877909U CN209877909U CN201920700062.1U CN201920700062U CN209877909U CN 209877909 U CN209877909 U CN 209877909U CN 201920700062 U CN201920700062 U CN 201920700062U CN 209877909 U CN209877909 U CN 209877909U
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- centering shaft
- conical round
- round platform
- measuring
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Abstract
The utility model discloses a positioner of round hole the central axis, including sleeve, driving motor, centering shaft, left toper round platform, right toper round platform, left-handed nut, pressure spring and a plurality of gauge head. The left conical round platform, the pressure spring, the left-handed nut and the right conical round platform are sequentially sleeved on the centering shaft, and the large ends of the left conical round platform and the right conical round platform are opposite; the centering shaft is provided with a left-handed thread and a right-handed thread, the left conical round table is connected with the centering shaft in a sliding manner, the left-handed nut is in transmission connection with the left-handed thread of the centering shaft, and the right conical round table is in transmission connection with the right-handed thread of the centering shaft; one end of the pressure spring abuts against the left conical round table, and the other end of the pressure spring abuts against the left-handed nut; the plurality of measuring heads are arranged in the axial chutes of the left conical round platform and the right conical round platform through the sliding blocks, and the upper ends of the measuring heads penetrate through the sleeve supporting barrel and are connected with the inner wall of the processed deep hole. The utility model overcomes current measuring tool can not conveniently carry out downthehole measuring and the not enough of adjustment, can realize the accurate positioning of round hole the central axis, provides the foundation for the adjustment of subsequent deep hole machining cutter.
Description
Technical Field
The utility model relates to a machining technology field, concretely relates to round hole the central axis's positioner can be used for the hole type part central point that detection, the rectifying and the main equipment installation in of BTA axis straightness accuracy put the measurement.
Background
Deep hole machining is widely applied to the mechanical industry, such as hydraulic oil cylinders, oil change pump pipes, gun body pipes, mechanical equipment shells and the like, and the machined deep hole parts are often matched with other shaft and hole parts to realize the overall functions of the equipment. Therefore, it is very important to ensure the axial straightness of the hole parts during the machining process.
At present, in the deep hole machining process, due to the limitation of geometric shapes, a measuring tool cannot be conveniently operated and adjusted in the deep hole machining process, and therefore how to quickly and accurately determine the linear position of the central axis of the deep hole and how to detect the straightness of the deep hole are a current research hotspot.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the existing measuring tool cannot conveniently measure and adjust in a deep hole. The utility model aims at providing a round hole center positioning device, the device can realize the accurate positioning of round hole the central axis, provides the foundation for subsequent deep hole machining cutter's adjustment.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a positioning device for the central axis of a circular hole comprises a sleeve, a driving motor, a centering shaft, a left conical round table, a right conical round table, a left-handed nut, a pressure spring and a plurality of measuring heads; the outer side walls of the left end and the right end of the sleeve are respectively provided with three radial supporting cylinders which are uniformly distributed; the centering shaft is rotatably arranged at the center of the sleeve, two ends of the centering shaft extend out of the sleeve, one end of the extending end of the centering shaft is connected with the driving motor, the left side of the centering shaft is provided with a left-handed thread part and a smooth cylindrical part, and the right side of the centering shaft is provided with a right-handed thread part; the left conical round platform, the pressure spring, the left-handed nut and the right conical round platform are sequentially sleeved on the fixed mandrel, and the large end of the left conical round platform is opposite to the large end of the right conical round platform; the left conical round platform is in sliding connection with the smooth cylindrical part of the centering shaft, the left-handed nut is in spiral transmission connection with the left-handed thread part of the centering shaft, and the right conical round platform is in spiral transmission connection with the right-handed thread part of the centering shaft; one end of the pressure spring abuts against the small end face of the left conical round table, and the other end of the pressure spring abuts against the left-handed nut; the conical surfaces of the left conical round platform and the right conical round platform are respectively provided with three axial sliding chutes which are uniformly distributed, and sliding rails are arranged in the axial sliding chutes; the three measuring heads are arranged in the three axial sliding grooves of the left conical round table one by one through sliding blocks, the upper ends of the measuring heads can slidably penetrate through the supporting cylinder, and the heads of the measuring heads are connected with the inner wall of the processed deep hole; the three measuring heads are arranged in the axial sliding groove of the right conical round platform one by one through the sliding blocks, the upper ends of the measuring heads can slidably penetrate through the supporting cylinder, and the heads of the measuring heads are connected with the inner wall of the processed deep hole; the slide block drives the measuring head to slide along the slide rail.
Further, the device also comprises a laser emitter and a photoelectric detector; the other end of the extending end of the centering shaft is provided with a laser emitter, and the photoelectric detector is arranged outside the processed deep hole and used for receiving laser emitted by the laser emitter. And a laser emitter arranged on the centering shaft is used for emitting laser to irradiate the photoelectric detector, and the current deep hole axis position is measured. If the axial line position of the current processed deep hole deviates relative to the initial position, the tool can be adjusted through deviation data to correct the deviation.
In order to prevent the left-handed nut from rotating along with the centering shaft when the centering shaft rotates, the left-handed nut is preferably provided with a positioning rod, the inner side wall of the sleeve is provided with an axial positioning groove, and the positioning rod slides in the axial positioning groove. The positioning rod limits the circumferential rotation of the left-handed nut, so that the work is more reliable.
In order to facilitate assembly and adapt to pipelines with different diameters, the measuring head preferably comprises a fixed measuring rod and a movable measuring head, the fixed measuring rod is in threaded connection with the movable measuring head, the head of the movable measuring head is connected with the inner surface of the sleeve, and the bottom of the fixed measuring rod is connected with the sliding block.
For convenience in assembly, the fixed measuring rod is preferably connected with the sliding block through a triangular supporting block, and the bottom surface of the triangular supporting block is attached to the upper surface of the sliding block.
In order to reduce the friction force between the left conical round table and the centering shaft, the left conical round table is preferably connected with the centering shaft in a sliding manner through a linear bearing.
In order to improve the positioning accuracy, the thread pitch of the left-hand thread part of the centering shaft is preferably larger than the thread pitch of the right-hand thread part of the centering shaft, and the thread pitch of the left-hand nut is preferably larger than the thread pitch of the right-hand tapered circular truncated cone. When the centering shaft is driven by the driving motor to rotate, the speed of the right conical round table moving to the right side is greater than the speed of the left nut moving to the left side, the right side measuring rod extends out firstly, and the left side measuring rod extends out afterwards, so that the positioning interference generated when the left side measuring rod and the right side measuring rod extend out simultaneously is avoided.
The utility model has the advantages that:
1. the defect that the conventional measuring tool cannot conveniently carry out in-hole measurement and adjustment is overcome, the accurate positioning of the central axis of the circular hole can be realized, and a basis is provided for the subsequent adjustment of the deep hole machining tool.
2. The flexible positioning of the device can be realized through the arrangement of the left-handed nut and the pressure spring, and the positioning precision is high.
3. Simple operation and high reliability.
Drawings
Fig. 1 is a schematic view showing the mounting structure of a positioning device of embodiment 1;
fig. 2 is a schematic perspective view showing a sleeve of the positioning device of embodiment 1;
fig. 3 is a schematic perspective view showing a left-hand nut of the positioning device of embodiment 1;
fig. 4 is a perspective view showing a left tapered circular truncated cone of the positioning device of embodiment 1;
fig. 5 is a perspective view showing a right tapered circular truncated cone of the positioning device according to embodiment 1.
In the figure:
1. the device comprises a sleeve, 2, an end cover, 3, a centering shaft driving motor, 4, a sliding rail, 5, a sliding block, 6, a triangular supporting block, 7, a fixed measuring rod, 8, a movable measuring head, 9, a supporting cylinder, 10, a right conical circular table, 11, a left-handed nut, 12, a pressure spring, 13, a left conical circular table, 14, a linear bearing, 15, a centering shaft, 16, a laser emitter, 17 and a photoelectric detector.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and a preferred embodiment.
In the following description, the left side of the positioning device shown in the figure is "left" and vice versa with reference to the orientation of the positioning device shown in fig. 1.
Embodiment mode 1
Referring to fig. 1 to 5, the positioning device for the central axis of the circular hole comprises a sleeve 1, an end cover 2, a driving motor 3, a slide rail 4, a slide block 5, a triangular support block 6, a fixed measuring rod 7, a movable measuring head 8, a support cylinder 9, a right conical round table 10, a left-handed nut 11, a pressure spring 12, a left conical round table 13, a linear bearing 14, a centering shaft 15, a laser emitter 16 and a photoelectric detector 17.
The sleeve 1 is a cylinder with a bottom, and the open end is detachably connected with the end cover 2 through threads. And a centering shaft mounting hole is axially formed at the bottom of the sleeve and the central part of the end cover 2. Three movable measuring head mounting holes are uniformly distributed on the circumferential side walls at the left end and the right end of the sleeve 1 respectively, a supporting cylinder 9 is radially arranged on the outer side of each movable measuring head mounting hole, and the inner diameter of each supporting cylinder 9 is matched with the outer diameter of each movable measuring head 8. The inner side wall of the sleeve 1 is axially provided with a T-shaped positioning groove 1-1.
The centering shaft 15 is cylindrical, a smooth cylindrical portion and a left-handed thread portion are arranged on the left side of the centering shaft, the smooth cylindrical portion is arranged at the left end of the centering shaft and connected with the left-handed thread portion, a right-handed thread portion is arranged on the right side of the centering shaft, and the thread pitch of the left-handed thread portion is larger than that of the right-handed thread portion.
The left-hand nut 11 is a hexagonal nut, and the inner thread of the left-hand nut is matched with the outer thread of the left-hand thread part of the centering shaft 15. The positioning rod 111 is radially connected to the outer peripheral surface of the left-hand nut 10, and the positioning rod 111 and the left-hand nut 11 are fixedly connected together by welding or screwing. The head of the positioning rod 111 is provided with a T-shaped positioning part which is matched with the T-shaped positioning groove 1-1 of the sleeve 1, and the positioning rod 111 slides in the T-shaped positioning groove 1-1.
The left conical round platform 13 is a solid conical round platform, a through hole 131 is axially formed in the center of the left conical round platform, a linear bearing 14 is sleeved in the through hole 131, and the inner diameter of the linear bearing 14 is matched with the outer diameter of the smooth cylindrical part of the centering shaft 15. The conical surface of the left conical round platform 13 is evenly provided with three rectangular through grooves 132 along the generatrix direction, and the sliding rails 4 are arranged in the rectangular through grooves 132.
The right conical round table 10 is a solid conical round table, a threaded through hole 101 is axially formed in the center of the right conical round table, and internal threads of the threaded through hole 101 are matched with external threads of a right-handed threaded portion of the centering shaft 15. Three rectangular through grooves 102 are uniformly formed in the conical surface of the right conical round platform 10 along the generatrix direction, and the sliding rails 4 are installed in the rectangular through grooves 102.
In the present embodiment, the probe is composed of a movable probe 8, a fixed measuring rod 7 and a triangular support block 6. The movable measuring head 8 and the fixed measuring rod 7 are cylindrical, the head of the movable measuring head 8 is spherical, the movable measuring head 8 is in threaded connection with the fixed measuring rod 7, the bottom of the fixed measuring rod 7 is in threaded connection with the triangular support block 6, the bottom surface of the triangular support block 6 is an inclined surface, the bottom surface of the triangular support block 6 is bonded with the top surface of the sliding block 5, and the sliding block 5 is matched with the sliding rail 4.
The positioning device of example 1 was assembled in the following manner:
the centering shaft 15 passes through the centering shaft mounting holes of the sleeve 1 and the end cover 2 and is rotatably arranged in the inner cavity of the sleeve 1 through a bearing, two ends of the centering shaft extend out of the sleeve 1, and one extending end is connected with an output shaft of the driving motor 3 and driven to rotate by the driving motor 3; the other protruding end is provided with a laser emitter 16, the emitting head of the laser emitter 16 faces outwards, and the laser beam of the laser emitter is emitted along the axis of the centering shaft 15. The laser emitter 16 is a conventional emitter, and in this embodiment, a 980nm infrared dot emitter of a high-power laser with model number FU980AD100-BC 10100 mw, manufactured by Shenzhen Rich radium technology Limited is selected.
The left conical round table 13, the pressure spring 12, the left-handed nut 11 and the right conical round table 10 are sequentially sleeved on the centering shaft 15. The left conical round platform 13 is opposite to the big end of the right conical round platform 10 and is symmetrically arranged. The left conical round table 13 is slidably connected with the smooth cylindrical portion of the centering shaft 15. The left-hand nut 11 is in screw transmission connection with the left-hand thread part of the centering shaft 15, and the T-shaped positioning part of the positioning rod 111 of the left-hand nut 11 is positioned in the T-shaped positioning groove of the sleeve 1. The right conical round table 10 is in spiral transmission connection with a right-handed thread part of the centering shaft 15. One end of the pressure spring 12 abuts against the small end face of the left conical round table 13, and the other end abuts against the left-handed nut 11. The three measuring heads on the left side are arranged in the three axial sliding grooves 132 of the left conical round table 13 one by one through the sliding blocks 5, the three measuring heads on the right side are arranged in the three axial sliding grooves 102 of the right conical round table 10 one by one through the sliding blocks 5, the movable measuring heads 8 of all the measuring heads are contracted in the supporting cylinder 9, and the spherical heads of the movable measuring heads face outwards.
The positioning device of embodiment 1 works in the following manner:
during operation, the assembled positioning device is arranged at the center of a processed deep hole, and the photoelectric detector 17 is arranged outside the processed deep hole and is opposite to the laser emitter 16. The driving motor 3 is started to drive the centering shaft 15 to rotate, the right-handed thread part on the centering shaft 15 drives the right conical round table to move rightwards along the centering shaft, the slide block 5 slides from the small end to the large end of the right conical round table along the slide rail 4, the right measuring head generates radial displacement, the three movable measuring rods 8 on the right side firstly extend out of the supporting cylinder 9, and the spherical heads of the three movable measuring rods 8 on the right side abut against the inner wall of a deep hole to be machined; meanwhile, the left-handed thread part of the centering shaft 15 drives the left-handed nut 11 to move left along the axial direction of the centering shaft, the left-handed nut 11 compresses the pressure spring 12, the left conical round table moves left along the axial direction of the centering shaft under the pushing of the spring force of the pressure spring, the movable measuring head 8 of the three measuring heads on the left side is driven to extend out of the supporting barrel 9, and the thread pitch of the left-handed thread part of the centering shaft 15 is larger than that of the right-handed thread part of the left-handed thread part, so that the movable measuring head on the left side is contacted with the inner wall of. At the moment, the axis centering function of the current position of the processed deep hole can be realized through 6 measuring heads distributed circumferentially, and the laser emitter 16 arranged on the centering shaft is used for emitting laser to irradiate the photoelectric detector 17, so that the current deep hole axis position is measured. If the axial line position of the current processed deep hole deviates relative to the initial position, the tool can be adjusted through deviation data to correct the deviation.
The laser emitter 16 is the prior art, and the model of the Shenzhen Fuji radium technology Limited is FU980AD100-BC 10100 mw high-power laser 980nm infrared ray punctiform emitter.
Parts which are not specifically described in the above description are prior art or can be realized by the prior art.
Claims (7)
1. A positioning device for the central axis of a circular hole is characterized by comprising a sleeve, a driving motor, a centering shaft, a left conical round table, a right conical round table, a left-handed nut, a pressure spring and a plurality of measuring heads; the outer side walls of the left end and the right end of the sleeve are respectively provided with three radial supporting cylinders which are uniformly distributed; the centering shaft is rotatably arranged at the center of the sleeve, two ends of the centering shaft extend out of the sleeve, one end of the extending end of the centering shaft is connected with the driving motor, the left side of the centering shaft is provided with a left-handed thread part and a smooth cylindrical part, and the right side of the centering shaft is provided with a right-handed thread part; the left conical round platform, the pressure spring, the left-handed nut and the right conical round platform are sequentially sleeved on the fixed mandrel, and the large end of the left conical round platform is opposite to the large end of the right conical round platform; the left conical round platform is in sliding connection with the smooth cylindrical part of the centering shaft, the left-handed nut is in spiral transmission connection with the left-handed thread part of the centering shaft, and the right conical round platform is in spiral transmission connection with the right-handed thread part of the centering shaft; one end of the pressure spring abuts against the small end face of the left conical round table, and the other end of the pressure spring abuts against the left-handed nut; the conical surfaces of the left conical round platform and the right conical round platform are respectively provided with three axial sliding chutes which are uniformly distributed, and sliding rails are arranged in the axial sliding chutes; the three measuring heads are arranged in the three axial sliding grooves of the left conical round table one by one through sliding blocks, the upper ends of the measuring heads can slidably penetrate through the supporting cylinder, and the heads of the measuring heads are connected with the inner wall of the processed deep hole; the three measuring heads are arranged in the axial sliding groove of the right conical round platform one by one through the sliding blocks, the upper ends of the measuring heads can slidably penetrate through the supporting cylinder, and the heads of the measuring heads are connected with the inner wall of the processed deep hole; the slide block drives the measuring head to slide along the slide rail.
2. The positioning device of claim 1, further comprising a laser emitter and a photodetector; the other end of the extending end of the centering shaft is provided with a laser emitter, and the photoelectric detector is arranged outside the processed deep hole and used for receiving laser emitted by the laser emitter.
3. The positioning device according to claim 1 or 2, wherein the left-hand nut is provided with a positioning rod, the inner side wall of the sleeve is provided with an axial positioning groove, and the positioning rod slides in the axial positioning groove.
4. The positioning device according to claim 1 or 2, wherein the measuring head comprises a fixed measuring rod and a movable measuring head, the fixed measuring rod is connected with the movable measuring head in a threaded mode, the head of the movable measuring head is connected with the inner surface of the sleeve, and the bottom of the fixed measuring rod is connected with the sliding block.
5. The positioning device of claim 4, wherein the fixed measuring bar is connected to the slider by a triangular support block, the bottom surface of the triangular support block abutting the upper surface of the slider.
6. The positioning device according to claim 1 or 2, wherein the left conical frustum is slidably connected to the centering shaft by a linear bearing.
7. The positioning device according to claim 1 or 2, wherein the pitch of the left-hand threaded portion of the centering shaft is greater than the pitch of the right-hand threaded portion thereof, and the pitch of the left-hand nut is greater than the pitch of the right-hand tapered circular truncated cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920700062.1U CN209877909U (en) | 2019-05-15 | 2019-05-15 | Positioning device for central axis of circular hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920700062.1U CN209877909U (en) | 2019-05-15 | 2019-05-15 | Positioning device for central axis of circular hole |
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| Publication Number | Publication Date |
|---|---|
| CN209877909U true CN209877909U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920700062.1U Active CN209877909U (en) | 2019-05-15 | 2019-05-15 | Positioning device for central axis of circular hole |
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| CN (1) | CN209877909U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174750A (en) * | 2020-02-19 | 2020-05-19 | 黑龙江工业学院 | Pipe fitting lateral wall straightness accuracy measuring tool |
-
2019
- 2019-05-15 CN CN201920700062.1U patent/CN209877909U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174750A (en) * | 2020-02-19 | 2020-05-19 | 黑龙江工业学院 | Pipe fitting lateral wall straightness accuracy measuring tool |
| CN111174750B (en) * | 2020-02-19 | 2021-04-13 | 黑龙江工业学院 | Pipe fitting lateral wall straightness accuracy measuring tool |
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Effective date of registration: 20221205 Address after: No. 115, Entrepreneurship Education Center, No. 99, Wenlan Street, Qixia District, Nanjing, Jiangsu, 210000 Patentee after: Nanjing shanghuanyu precision testing technology Co.,Ltd. Address before: 210023 No. 99 Wenlan Road, Xianlin University City, Nanjing, Jiangsu Province Patentee before: NANJING College OF INFORMATION TECHNOLOGY |