CN218226271U - Hydraulic pressure inspection dabber - Google Patents
Hydraulic pressure inspection dabber Download PDFInfo
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- CN218226271U CN218226271U CN202222309111.3U CN202222309111U CN218226271U CN 218226271 U CN218226271 U CN 218226271U CN 202222309111 U CN202222309111 U CN 202222309111U CN 218226271 U CN218226271 U CN 218226271U
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- mandrel
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Abstract
The utility model discloses a hydraulic pressure inspection dabber, including the dabber, the cover rises, pressurization oil circuit and sealed pressure boost subassembly, this inspection dabber utilizes static pressure expansion principle, set up on the cover that rises and add the pressurized tank and communicate with the pressurization oil circuit, inject hydraulic oil in pressurized tank and pressurization oil circuit, sealed pressure boost subassembly seals the pressurization oil circuit, can follow the axial displacement of oil circuit simultaneously, sealed pressure boost subassembly removes the hydraulic oil pressurization to in the pressurization oil circuit, make pressure increase to a definite value in the cavity, pressure conduction is to in adding the pressurized tank, the thin wall department that makes the cover that rises through static pressure warp, the realization is to being examined the location of work piece and pressing from both sides tightly. The inspection mandrel has the advantages of simple structure, short manufacturing period, convenience in disassembly and assembly in the inspection process, high repeated positioning precision, guarantee of the precision requirement in the inspection process and high use value.
Description
Technical Field
The utility model relates to a machining technical field specifically is a hydraulic pressure inspection dabber.
Background
At present, gear manufacturers adopt a traditional-structure inspection mandrel for inspecting the runout of a gear ring and an end face after machining a piece gear, namely, a bonding (rigid) chuck with certain taper is matched with a conical surface of a body, and the elasticity of the chuck is utilized to tension a workpiece.
The inspection mandrel with the existing structure has the following defects that firstly, the processes of processing, heat treatment and bonding of the chuck are complex, so that the manufacturing period is long; secondly, a conical surface matching mode is adopted, and after the workpiece is detected, the chuck is not easy to fall off from the conical surface of the body due to the mechanical self-locking factor, so that the workpiece is inconvenient to disassemble, and the labor intensity of workers is additionally increased; in addition, the repeated positioning precision of the existing chuck can not be ensured, the inspection quality is ensured by measuring for many times, and the inspection accuracy is influenced.
SUMMERY OF THE UTILITY MODEL
To current inspection dabber loading and unloading inconvenient, add the not controllable power of holding, press from both sides the not high and unstable condition of tight positioning accuracy, seriously influenced the problem of the precision of gear inspection, the utility model provides a hydraulic pressure inspection dabber has guaranteed the required precision in the testing process, has higher use value.
The utility model discloses a realize through following technical scheme:
a hydraulic inspection mandrel comprises a mandrel, an expansion sleeve, a pressurizing oil path and a sealing pressurizing assembly;
the sealed cover of the cover that rises is established at the dabber, and the outside of the cover that rises is used for the cover to establish the work piece that awaits measuring, rises to be provided with between cover and the dabber and adds the pressure tank, and the pressurization oil circuit sets up in the dabber and with add the pressure tank intercommunication, the tip of dabber is provided with the sealed hole with the pressurization oil circuit intercommunication, and sealed pressurization subassembly sets up in sealed hole and can follow its axial displacement for it warp to rise the cover to the pressurization of pressurization groove through the pressurization oil circuit.
Preferably, the seal pressing assembly comprises a pressurizing pin, a sealing ring and a supporting ring;
the support ring sets up in sealed bottom, and the sealing ring cover is established in sealed hole, and the pressure boost pin bushing is established in sealed ring, and sealing ring, sealed hole and pressure boost round pin sealing connection each other, pressure boost round pin can follow the axial displacement of sealing ring and stretch into in the support ring.
Preferably, the end part of the sealing hole is further provided with a threaded pressing sleeve and is positioned at the end part of the sealing ring, the end part of the pressurizing pin is provided with a pressurizing plug screw, and the pressurizing plug screw is in threaded connection with the sealing hole.
Preferably, a check ring is arranged in the sealing hole and is positioned on one side of the pressurizing screw plug, which is far away from the pressurizing oil path.
Preferably, the pressurizing groove is an annular groove, and the thickness of the side wall of the annular groove is less than 0.5mm.
Preferably, the mandrel is further provided with a pressure supplementing oil way, one end of the pressure supplementing oil way is communicated with the pressure adding oil way, the other end of the pressure supplementing oil way is provided with a pressure supplementing assembly, and the pressure supplementing assembly can axially move in the pressure supplementing oil way to compensate the loss pressure of the pressure adding oil way.
Preferably, the mandrel is provided with an oil filling hole, one end of the oil filling hole is communicated with the pressurizing oil way, and the other end of the oil filling hole is sealed through a detachable sealing component.
Preferably, the mandrel is provided with an exhaust hole, one end of the exhaust hole is communicated with the pressurizing groove, and the other end of the exhaust hole is sealed through a sealing component.
Preferably, the mandrel is provided with a positioning ring and is positioned at the end part of the expansion sleeve for axially positioning the part to be measured.
Preferably, the mandrel is further provided with a pressing plate and a locking nut, the pressing plate is sleeved on the mandrel and used for being pressed on the end face of the workpiece to be tested, and the locking nut is connected with the mandrel and located on one side, far away from the workpiece to be tested, of the pressing plate.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model provides a pair of hydraulic pressure inspection dabber, including the dabber, the cover rises, pressurization oil circuit and sealed pressure boost subassembly, this inspection dabber utilizes static pressure expansion principle, set up on the cover that rises and add the pressure tank and with pressurization oil circuit intercommunication, inject hydraulic oil in pressure tank and pressurization oil circuit, sealed pressure boost subassembly seals the pressurization oil circuit, can follow the axial displacement of oil circuit simultaneously, sealed pressure boost subassembly removes the hydraulic oil pressurization to in the pressurization oil circuit, make pressure increase to a definite value in the cavity, pressure conduction is to in adding the pressure tank, thin wall department through the static pressure messenger cover that rises warp, the realization is tight to the location and the clamp of examining the work piece. The inspection mandrel has the advantages of simple structure, short manufacturing period, convenience in disassembly and assembly in the inspection process, high repeated positioning precision, guarantee of the precision requirement in the inspection process and high use value.
Drawings
Fig. 1 is a cross-sectional view of the inspection mandrel of the present invention;
FIG. 2 is a cross-sectional view of the machined part of the present invention;
FIG. 3 is a structural diagram of the pressure compensating assembly of the present invention;
FIG. 4 is a block diagram of the seal assembly of the present invention;
fig. 5 is the three-dimensional drawing of the welding type hydraulic inspection mandrel of the utility model.
In the figure: 1. a pressurizing screw plug; 2. sealing the pressurized assembly; 3. pressing a sleeve by the screw thread; 4. a mandrel; 5. a support ring; 6. sealing the steel ball A;7. a top thread A;8. expanding sleeves; 9. a workpiece to be tested; 10. pressing a plate; 11. locking the nut; 12. a jackscrew B;13. sealing the steel ball B;14. a pressure compensating assembly; 15. a retainer ring for a bore; 14-1 urethane sealing plugs; 14-2 threaded pins; 14-3 set screws; 2-1, pressurizing the pin; 2-2 sealing ring 1;2-3 stedt; 2-4O-shaped ring A;2-5 sealing the copper ring; 2-6, pressing a ring; 2-7O-ring B.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings, which are provided for purposes of illustration and not limitation.
Referring to fig. 1-5, a hydraulic inspection mandrel for inspecting the runout of a gear ring and an end face after gear machining comprises a mandrel 4, an expansion sleeve 8, a pressurizing oil path, a pressure supplementing oil path and a sealing pressurizing assembly.
The expansion sleeve 8 is fixedly sleeved on the mandrel, the workpiece to be measured 9 is sleeved outside the expansion sleeve 8, a pressurizing groove is formed between the expansion sleeve 8 and the mandrel, a pressurizing oil path and a pressure supplementing oil path are arranged in the mandrel 4 and are communicated with each other, one end of the pressurizing oil path is connected with the pressurizing groove, a sealing hole coaxially communicated with the pressurizing oil path is formed in the end portion of the mandrel, and a sealing pressurizing assembly is arranged in the sealing hole to seal the pressurizing oil path.
The sealing pressurizing assembly comprises a pressurizing pin 2-1, a sealing ring and a supporting ring 5, the supporting ring 5 is arranged at the sealed bottom, the sealing ring is sleeved in a sealing hole, the pressurizing pin is sleeved in the sealing ring, the sealing hole and the pressurizing pin are mutually and hermetically connected, the pressurizing pin can extend into the supporting ring along the axial movement of the sealing ring, the pressurizing groove is pressurized through a pressurizing oil path to enable the expansion sleeve to deform, and the positioning of a workpiece to be measured is achieved.
The outer wall of the sealing ring is sleeved with an O-shaped ring A2-4 to seal the sealing ring and the sealing hole, the inner wall of the sealing ring is provided with an steckel seal 2-3, the end part of the sealing ring is provided with a pressing ring 2-6, an O-shaped ring B2-7 is arranged between the pressing ring and the sealing ring, the sealing ring and a pressurizing pin are hermetically connected through the steckel seal 2-3 and the O-shaped ring B2-7, a threaded pressing sleeve 3 is arranged in the sealing hole and is positioned at the end part of the sealing ring, the threaded pressing sleeve 3 is connected with the sealing hole through threads to fix the sealing ring, the end part of the pressurizing pin sequentially penetrates through the threaded pressing sleeve 3, the sealing ring and the pressing ring 2-6 to extend into a supporting ring 5, and the other end of the pressurizing pin is connected with a pressurizing plug screw, pressurization plug screw 1 passes through threaded connection with the oral area of sealed hole, the oral area of sealed hole still is provided with hole and uses retaining ring 15, hole is installed in the outside of pressurization plug screw 1 with retaining ring 15, prevent that pressurization plug screw 1's axial from scurrying out and taking place accident, the sealing ring has utilized the compressible line of copper product itself, with the sealing washer cooperation, high-pressure seal's requirement has further been guaranteed, and detachability has, be convenient for the maintenance and the maintenance of inspection dabber in the later stage use, make the axial removal of pressure boost pin through rotatory pressurization plug screw 1, exert pressure to the hydraulic oil in the pressurization oil circuit, it warp to make the expansion sleeve in the pressurization groove to conduct pressure through the pressurization oil circuit, realize the fixed to the work piece that awaits measuring.
The expansion sleeve is of an annular structure, the pressurizing groove is an annular groove formed in the middle of the inner wall of the expansion sleeve, the annular groove is communicated with a pressurizing oil way, the wall thickness of the expansion sleeve in the annular groove region is smaller than 0.5mm, the width of the annular groove is larger than 20mm, the side wall of the pressurizing groove is made into a thin wall, the expansion sleeve is convenient to deform after pressurization, the expansion sleeve is made of copper, positioning rings are respectively arranged at two ends of the expansion sleeve, one positioning ring close to a sealing hole is positioned on the outer wall of the expansion sleeve, the positioning ring at the other end is the inner wall of the expansion sleeve, the mandrel is a stepped shaft, the expansion sleeve is assembled on the stepped shaft, two positions of the mounting joint surface of the mandrel 4 and the expansion sleeve are processed with grooves, brazing filler metal for welding is filled in the grooves, the mandrel and the expansion sleeve are welded together by utilizing the gap principle through a brazing process, so that the sealing connection of the mandrel and the expansion sleeve is ensured, and the requirement for high-pressure sealing in the use process is met.
The pressurizing oil way comprises a main oil way and a branch oil way, one end of the main oil way is communicated with the sealing hole, the other end of the main oil way is communicated with one end of the branch oil way, the other end of the branch oil way is communicated with the pressurizing groove, one end of the main oil way of the pressure supplementing oil way is communicated, the other end of the pressure supplementing oil way is connected with the compensating pressure hole, a pressure supplementing assembly 14 is arranged in the compensating pressure hole, and when the pressurizing oil way is used for a long time, the pressure loss is caused, and the pressure supplementing assembly 14 axially moves in the compensating pressure hole to pressurize the pressurizing oil way.
The pressure compensating assembly 14 comprises a polyurethane sealing plug 14-1, a threaded pin 14-2 and a set screw 14-3, the polyurethane sealing plug 14-1 is installed in the pressure compensating hole in an interference fit mode, the threaded pin abuts against the end portion of the polyurethane sealing plug, and the set screw is arranged at the opening of the pressure compensating hole and fixes the threaded pin and is used for compensating the pressure of the inspection mandrel after long-term use.
An oil filling hole is formed in a boss of the mandrel 4, one end of the oil filling hole is communicated with a main oil way of a pressurizing oil way, and the opening of the oil filling hole is sealed through a sealing steel ball A6 and a jackscrew A7; the other end of the mandrel 4 is also provided with an exhaust hole, one end of the exhaust hole is communicated with the pressurizing groove, the other end of the exhaust hole is positioned at the end part of the mandrel, the end part is sealed through a sealing steel ball 13 and a jackscrew B12, when the pressurizing oil way is filled with oil, the exhaust hole is communicated with the pressurizing oil way and the oil filling hole through the pressurizing groove, the exhaust hole is opened, and air is prevented from being reserved in the oil way.
The workpiece to be measured 9 is sleeved on the outer side of the expansion sleeve 8, the mandrel is further provided with an axial fixing device which comprises a pressing plate 10 and a locking nut 11, the pressing plate is sleeved on the mandrel and is pressed on the end face of the workpiece to be measured, and the locking nut 11 is connected with the mandrel and is fixed to the pressing plate.
The working principle of the hydraulic checking mandrel is explained in detail below, and the working principle comprises the following steps:
step 1, welding a mandrel 4 and an expansion sleeve 8, wherein the surface of a welding seam is smooth;
and 3, installing a sealing pressurizing assembly in the sealing hole of the mandrel 4, and fixing the sealing pressurizing assembly through a threaded pressing sleeve 10.
Step 4, injecting hydraulic oil through an oil injection hole in a pillow block of the mandrel 4, and sealing the hydraulic oil through a sealing steel ball and a jackscrew after the hydraulic oil seeps out of an exhaust hole at the right end of the mandrel 4;
step 5, continuously injecting hydraulic oil through the oil injection hole, and after the oil is completely filled, sealing the oil injection hole through a sealing steel ball and a fastening screw;
step 6, installing a pressurizing screw into a sealing hole of the mandrel until the pressurizing screw is pushed to the pressurizing pin, and installing a check ring 15 for the hole on the outer side of the pressurizing screw plug 1;
and 7, after the installation is finished, installing the workpiece to be tested on the outer side of the expansion sleeve, tightening the compression screw to realize the expansion of the workpiece to be tested, installing a pressure plate 10 on the outer side of the workpiece, and carrying out inspection after the workpiece is locked by a locking nut 11.
According to the hydraulic inspection mandrel, the problem of high-pressure sealing between the mandrel 4 and the expansion sleeve 8 is solved by using a brazing process; by utilizing the compressible deformability of the copper ring, the pressurizing side is sealed and can be detached through the pressurizing sealing component 2, so that the clamp is convenient to maintain; through the design of the exhaust port, the air is discharged during oil injection; the polyurethane sealing plug can compensate the oil pressure in the cavity of the inspection mandrel while ensuring sealing. The formed high-pressure sealing oil cavity enables the thin-wall expansion sleeve to expand to clamp a workpiece by adjusting the pressurizing screw, and has the advantages of high positioning precision, controllable clamping force, convenience in workpiece disassembly and assembly and the like. The problems of complex process, long processing period, inconvenience in assembly and disassembly, uncontrollable clamping force, low clamping and positioning accuracy and instability of the inspection mandrel with the original structure are solved.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (10)
1. A hydraulic inspection mandrel is characterized by comprising a mandrel (4), an expansion sleeve (8), a pressurizing oil way and a sealing pressurizing assembly;
the expansion sleeve (8) is sleeved on the mandrel in a sealing manner, a workpiece (9) to be detected is sleeved outside the expansion sleeve (8), a pressurizing groove is formed between the expansion sleeve (8) and the mandrel, a pressurizing oil path is arranged in the mandrel (4) and communicated with the pressurizing groove, a sealing hole communicated with the pressurizing oil path is formed in the end portion of the mandrel, and a sealing pressurizing assembly is arranged in the sealing hole and can move axially along the sealing hole and is used for pressurizing the pressurizing groove through the pressurizing oil path to enable the expansion sleeve (8) to deform.
2. A hydraulic checking mandrel according to claim 1 wherein the sealing and pressurizing assembly comprises a pressurizing pin, a sealing ring and a support ring (5);
support ring (5) set up in sealed bottom, and the sealing ring cover is established in sealed hole, and the pressure boost pin bushing is established in sealed ring, and sealing ring, sealed hole and pressure boost round pin sealing connection each other, pressure boost round pin can follow the axial displacement of sealing ring and stretch into in the support ring.
3. A hydraulic testing mandrel according to claim 2 wherein the end of the sealing bore is further provided with a threaded pressure sleeve (3) and located at the end of the sealing ring, the end of the pressure increasing pin is provided with a pressure plug screw (1), and the pressure plug screw (1) is in threaded connection with the sealing bore.
4. A hydraulic testing mandrel as claimed in claim 3 wherein a retainer ring is disposed in said seal bore on the side of the pressure plug remote from the pressure line.
5. A hydraulic inspection mandrel as claimed in claim 1 wherein the pressurized groove is a circumferential groove having a sidewall thickness of less than 0.5mm.
6. The hydraulic inspection mandrel as claimed in claim 1, wherein a pressure supplementing oil path is further arranged on the mandrel, one end of the pressure supplementing oil path is communicated with the pressure supplementing oil path, a pressure supplementing assembly (14) is arranged at the other end of the pressure supplementing oil path, and the pressure supplementing assembly (14) can axially move in the pressure supplementing oil path to compensate for the loss pressure of the pressure supplementing oil path.
7. A hydraulic testing mandrel according to claim 1 in which an oil injection hole is provided in the mandrel (4), one end of the oil injection hole communicating with the pressurised oil circuit and the other end being sealed by a removable sealing assembly.
8. The hydraulic inspection mandrel as claimed in claim 1 wherein the mandrel is provided with a vent hole, one end of the vent hole being in communication with the pressurization groove and the other end being sealed by a sealing assembly.
9. The hydraulic inspection mandrel as claimed in claim 1, wherein a positioning ring is disposed on the mandrel and located at an end of the expansion sleeve for axially positioning a part to be inspected.
10. The hydraulic inspection mandrel as claimed in claim 9, wherein the mandrel is further provided with a pressing plate (10) and a locking nut (11), the pressing plate is sleeved on the mandrel and used for being pressed on an end face of a workpiece to be inspected, and the locking nut (11) is connected with the mandrel and located on one side of the pressing plate away from the workpiece to be inspected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222309111.3U CN218226271U (en) | 2022-08-30 | 2022-08-30 | Hydraulic pressure inspection dabber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222309111.3U CN218226271U (en) | 2022-08-30 | 2022-08-30 | Hydraulic pressure inspection dabber |
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| Publication Number | Publication Date |
|---|---|
| CN218226271U true CN218226271U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222309111.3U Active CN218226271U (en) | 2022-08-30 | 2022-08-30 | Hydraulic pressure inspection dabber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117001032A (en) * | 2023-07-07 | 2023-11-07 | 温岭市三和数控机床设备有限公司 | Hydraulic expansion locking mechanism and turret |
-
2022
- 2022-08-30 CN CN202222309111.3U patent/CN218226271U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117001032A (en) * | 2023-07-07 | 2023-11-07 | 温岭市三和数控机床设备有限公司 | Hydraulic expansion locking mechanism and turret |
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