CN114131377A - Automatic zero positioning system and workpiece mother board - Google Patents
Automatic zero positioning system and workpiece mother board Download PDFInfo
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- CN114131377A CN114131377A CN202111584726.0A CN202111584726A CN114131377A CN 114131377 A CN114131377 A CN 114131377A CN 202111584726 A CN202111584726 A CN 202111584726A CN 114131377 A CN114131377 A CN 114131377A
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- valve rod
- air blowing
- upper cover
- blowing valve
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- 238000007664 blowing Methods 0.000 claims abstract description 99
- 238000001514 detection method Methods 0.000 claims abstract description 55
- 238000009434 installation Methods 0.000 claims abstract description 46
- 230000007246 mechanism Effects 0.000 claims abstract description 44
- 238000010926 purge Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 31
- 239000010959 steel Substances 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 17
- 239000003921 oil Substances 0.000 claims description 13
- 239000010720 hydraulic oil Substances 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 9
- 230000004308 accommodation Effects 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 238000012545 processing Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
- B23Q11/005—Devices for removing chips by blowing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Jigs For Machine Tools (AREA)
- Actuator (AREA)
Abstract
The invention discloses an automatic zero positioning system and a workpiece mother board, which comprise a base, an upper cover, a piston, a disc spring, a blind rivet locking mechanism and a blowing valve rod, wherein the upper cover is arranged on the base; a piston mounting cavity is formed in the base, the piston is arranged in the piston mounting cavity, the upper cover is fixed on the base, and a disc spring accommodating cavity for accommodating a disc spring is formed between the upper cover and the piston; the upper cover and the piston are internally provided with a blind rivet locking mechanism; the upper cover is also provided with a positioning bulge and an air blowing valve rod, the positioning bulge is higher than the upper end face of the upper cover, the air blowing valve rod is arranged in an air blowing valve rod mounting cavity of the upper cover and can move up and down, and the air blowing valve rod is provided with an air tightness detection through hole and a blowing through hole; the air blowing valve rod installation cavity is communicated with the first air passage. The automatic zero positioning system disclosed by the invention has a simple structure, can realize automatic purging of the positioning surface, and realizes automation of daughter board replacement.
Description
Technical Field
The invention relates to the technical field of machine tool workbenches, in particular to an automatic zero positioning system and a workpiece mother board.
Background
In the fields of machine manufacturing, measurement, machine tools, and robotic automated production lines, benchmarking is a concept that is very widely used. The reference is a point-line plane used to determine the object's superior and relationship basis. In the field of the mechanical industry, the reference is referred to as the zero point. In the machining or measurement, the zero point of the workpiece must be determined, and then the machining or measurement is performed according to the zero point. However, in the machining process, the parts cannot be kept still all the time, and from one process to another process, one machine tool to another machine tool needs to be aligned again, so that a lot of auxiliary work can be performed, a lot of downtime is caused, and the working efficiency is reduced. The zero point positioning system is an independent positioning and locking device, and can ensure that parts are switched among stations, processes and machine tools, and the zero point is kept unchanged. Therefore, the time for re-aligning the zero point is saved, and the working efficiency is greatly improved.
The zero point positioning system is particularly delicate, its positioning support surface needs to be highly cleaned, any fine particles remaining may cause deviations in the accuracy of the system, and therefore it needs to be cleaned. When the manual operation is carried out, workers can intensively clean the positioning support surface through the high-pressure air gun. However, when the positioning device is used for automatic production, due to unattended operation, cleaning of the positioning surface is a difficult problem, and external gas circuit cleaning in all directions is often required to be added, which increases the burden on design and processing.
Disclosure of Invention
The invention provides an automatic zero positioning system, which aims to solve the problem that the existing zero positioning system cannot realize automatic purging.
An automatic zero positioning system comprises a base, an upper cover, a piston, a disc spring, a blind rivet locking mechanism and an air blowing valve rod;
a piston installation cavity and an oil path channel are arranged in the base, the piston is arranged in the piston installation cavity, and hydraulic oil for driving the piston to lift can be injected into the oil path channel;
the upper cover is fixed on the base, a disc spring accommodating cavity is formed between the upper cover and the piston, and the disc spring is arranged in the disc spring accommodating cavity;
the upper cover and the piston are also provided with a blind rivet locking mechanism accommodating cavity, and the blind rivet locking mechanism is arranged in the blind rivet locking mechanism accommodating cavity;
the upper cover is also provided with a positioning bulge and an air blowing valve rod installation cavity, the positioning bulge is higher than the upper end surface of the upper cover, the upper end surface of the positioning bulge is a positioning surface, the air blowing valve rod is arranged in the air blowing valve rod installation cavity and can move up and down in the air blowing valve rod installation cavity, and the air blowing valve rod is provided with an air tightness detection through hole communicated with the upper end surface of the air blowing valve rod and the air blowing valve rod installation cavity and a purging through hole communicated with the side wall of the air blowing valve rod and the air blowing valve rod installation cavity and used for purging the positioning surface when the air blowing valve rod is lifted;
the air blowing valve rod installation cavity is communicated with the first air passage.
Further, the blowing valve rod comprises a blowing valve rod body, one end of the blowing valve rod body is provided with a limiting portion protruding outwards in the radial direction, the side wall of the other end of the blowing valve rod body is provided with a blowing gas guide groove used for guiding blowing gas to the positioning surface, a gas storage cavity is arranged in the blowing valve rod body, the gas tightness detection through hole is communicated with the gas storage cavity and the upper end face of the blowing valve rod body, and the blowing through hole is communicated with the gas storage cavity and the blowing gas guide groove.
The base is provided with a piston in-place detection device installation cavity and a piston in-place detection passage;
the piston in-place detection device is a switch valve;
the switch valve is arranged in the piston in-place detection device installation cavity, one end of a valve rod of the switch valve is arranged in the piston installation cavity, when the piston is reset under the action of restoring force of the disc spring, the lower end face of the piston pushes the valve rod to move, and when the piston is reset to a set position, the switch valve is conducted to enable the piston in-place detection passage to be conducted.
Further, the switch valve comprises a valve body, a valve rod, a spring, a first sealing ring, a second sealing ring and a limiting pin;
valve rod and spring are arranged in the valve body, realize the valve body route that the ooff valve opened and closed on valve body and the valve rod, be equipped with on the valve body and be used for going on sealed first sealing washer and be used for reaching the detection path and switching on the second sealing washer that seals to the piston that piston installation cavity and piston target in place detection device installation cavity of valve body both sides, be equipped with between valve body and the base the spacer pin.
Furthermore, a second gas passage communicated with the air blowing valve rod installation cavity and the rivet locking mechanism accommodating cavity is further arranged on the upper cover, and the gas outlet of the second gas passage is inclined towards the upper end face of the upper cover.
Furthermore, the blind rivet locking mechanism comprises a limiting end cover, a steel ball seat and an elastic piece;
the elastic component is arranged in the blind rivet locking mechanism holds the chamber bottom and upper portion and steel ball seat butt, circumference is equipped with a plurality of steel ball accommodation holes on the lateral wall of steel ball seat, the steel ball is arranged in the steel ball accommodation hole, the blind rivet locking mechanism of piston holds and is equipped with the steel ball thrust groove on the inside wall in chamber, spacing end cover is fixed the blind rivet locking mechanism who covers and one end is arranged in the piston holds the intracavity.
Furthermore, a damping valve is arranged at one end, close to the piston installation cavity, of the oil passage.
Furthermore, the rivet insertion end of the limiting end cover is also provided with a conical guide surface.
The invention discloses a workpiece mother board, which comprises a mother board body and a plurality of automatic zero point positioning systems arranged on the mother board body.
Further, the piston in-place detection passages of the automatic zero positioning systems are communicated in series through pipelines.
The automatic zero positioning system disclosed by the invention has the advantages that the automatic zero positioning system is provided with the air blowing valve rod structure, the upper cover is provided with the positioning bulge and the air blowing valve rod installation cavity, the air blowing valve rod is arranged in the air blowing valve rod installation cavity and can move up and down, the positioning surface of the positioning bulge can be automatically blown in the lifting process of the air blowing valve rod, the automation performance of a workbench is improved, and the integral automation performance of a machine tool is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an automated zero positioning system of the present disclosure, with daughter boards mounted thereon;
FIG. 2 is a block diagram of the blow valve stem;
FIG. 3 is a block diagram of a daughter board separated from a motherboard;
FIG. 4 is a block diagram of the piston in-position detecting device;
FIG. 5 is a cross-sectional view of the piston in position detection device;
FIG. 6 is a schematic diagram of an automated zero positioning system disclosed herein without a daughter board;
FIG. 7 is a control diagram of the disclosed automated zero positioning system.
In the figure: 1. the device comprises a base, 10, a piston mounting cavity, 11, an oil passage, 12, a first gas passage, 13, a piston in-place detection device mounting cavity, 14, a piston in-place detection passage, 2, an upper cover, 20, a disc spring accommodating cavity, 21, a rivet locking mechanism accommodating cavity, 22, a positioning protrusion, 23, an air blowing valve rod mounting cavity, 24, a positioning surface, 25, a second gas passage, 26, a clamping ring, 3, a piston, 30, a steel ball thrust groove, 4, a disc spring, 5, a rivet locking mechanism, 50, a limiting end cover, 51, a steel ball, 52, a steel ball seat, 53, an elastic piece, 54, a conical guide surface, 6, an air blowing valve rod, 60, an air blowing valve rod upper end surface, 61, an air tightness detection through hole, 62, a blowing through hole, 63, an air blowing valve rod body, 64, a limiting part, 65, a blowing gas guide groove, 66, a gas storage cavity, 7, a piston in-place detection device, 70, a valve body, 71, a piston in-place detection device mounting cavity, a piston in-place detection device, a piston, the valve comprises a valve rod 72, a spring 73, a first sealing ring 74, a second sealing ring 75, a limiting pin 76, a valve body passage 80, a pull nail 81, a supporting pad 82, a sub-plate 90, a solenoid valve 91, a pressure limiting valve 92 and a switching valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows an automatic zero positioning system disclosed by the invention, which comprises a base 1, an upper cover 2, a piston 3, a disc spring 4, a blind rivet locking mechanism 5 and a blowing valve rod 6;
a piston mounting cavity 10 and an oil passage 11 are arranged in the base 1, the piston 3 is arranged in the piston mounting cavity 10, and hydraulic oil for driving the piston 3 to lift can be injected into the oil passage 11;
the upper cover 2 is fixed on the base 1, a disc spring accommodating cavity 20 is formed between the upper cover 2 and the piston 3, the disc spring 4 is arranged in the disc spring accommodating cavity 20, specifically, annular grooves are processed on the lower end surface of the upper cover and the upper end surface of the piston to form the disc spring accommodating cavity, the upper end of the disc spring arranged in the disc spring accommodating cavity is abutted to the bottom of the annular groove on the upper cover, and the lower end of the disc spring is abutted to the bottom of the annular groove on the piston;
the upper cover 2 and the piston 3 are also provided with a blind rivet locking mechanism accommodating cavity 21, the blind rivet locking mechanism 5 is arranged in the blind rivet locking mechanism accommodating cavity 21, specifically, a through hole is processed in the center of the upper cover, a blind cavity is processed in the center of the piston to form the blind rivet locking mechanism accommodating cavity, in the embodiment, the blind rivet locking mechanism 5 comprises a limiting end cover 50, a steel ball 51, a steel ball seat 52 and an elastic piece 53; the elastic piece 53 is arranged at the bottom of the blind rivet locking mechanism accommodating cavity 21, the upper part of the elastic piece is abutted against the steel ball seat 52, a plurality of steel ball accommodating holes are circumferentially formed in the side wall of the steel ball seat 52, the steel balls are arranged in the steel ball accommodating holes, a steel ball thrust groove 30 is formed in the inner side wall of the blind rivet locking mechanism accommodating cavity 21 of the piston 3, the limiting end cover 50 is fixed on the upper cover 2, one end of the limiting end cover is arranged in the blind rivet locking mechanism accommodating cavity 21 of the piston, blind rivets and blind rivet locking mechanisms can be arranged according to requirements, and the blind rivets can be round blind rivets, diamond-shaped blind rivets or non-positioning blind rivets;
the upper cover 2 is further provided with a plurality of positioning protrusions 22 and air-blowing valve rod installation cavities 23, the number of the positioning protrusions is 4 in the drawing and can be set according to needs, the air-blowing valve rod installation cavities 23 are communicated with one another, the positioning protrusions 22 are higher than the upper end face of the upper cover and are generally about 3mm, the positioning protrusions are of a cone frustum-shaped structure in the application, the upper end face of each positioning protrusion 22 is a positioning face, the air-blowing valve rod 6 is arranged in the air-blowing valve rod installation cavity 23 and can move up and down in the air-blowing valve rod installation cavity 23, and the air-tightness detection through hole 61 for communicating the upper end face 60 of the air-blowing valve rod with the air-blowing valve rod installation cavity 23 and the purging through hole 62 for communicating the side wall of the upper part of the air-blowing valve rod with the air-blowing valve rod installation cavity 23 and used for purging the positioning face when the air-blowing valve rod is lifted are arranged on the air-blowing valve rod 6;
the blow valve stem mounting cavity 23 communicates with the first gas passageway 12.
The working process of the automatic zero positioning system disclosed by the invention is as follows: the automatic zero positioning systems disclosed by the invention are fixed on a mother board of a machine tool, a plurality of pull nails 80 are fixed on a daughter board 82 of the machine tool, in the embodiment, a supporting pad 81 is fixed on the lower end surface of the daughter board, when the daughter board needs to be installed on the mother board, firstly, hydraulic oil is injected into an oil path channel 11, the hydraulic oil drives a piston to ascend and compresses a disc spring until the upper end surface of the piston is abutted against the lower end surface of an upper cover, in the ascending process of the piston, purging gas is injected into a first gas path 12, the purging gas drives a blowing valve rod to ascend, and in the ascending process of the blowing valve rod, the purging gas purges the upper end surface (positioning surface) of a positioning bulge so as to keep the cleaning of the positioning surface; meanwhile, the upper end face of the steel ball seat is abutted against the lower end face of the limiting end cover and compresses the elastic piece, and the steel ball is in a floating state in the steel ball seat; then, the daughter board is installed on the mother board, namely the blind rivet of the daughter board is inserted into the blind rivet locking mechanism accommodating cavity, and because the steel ball is in a floating state at the moment, the blind rivet can be conveniently inserted into the blind rivet locking mechanism accommodating cavity, and the bottom end face of the blind rivet is contacted with the bottom surface of the blind rivet locking mechanism accommodating cavity, namely the piston plays a supporting (lifting) role on the daughter board; then, discharging hydraulic oil, pushing the piston downwards under the action of restoring force of the disc spring, gradually approaching the sub-plate to the positioning surface along with the descending of the piston until the lower end surface of the sub-plate is contacted with the positioning surface, and gradually acting the steel ball with the steel ball thrust groove to lock the rivet in the descending process of the piston, wherein in the embodiment, the piston thrust groove is an arc surface, meanwhile, in the descending process of the sub-plate, injecting air tightness detection gas into the first gas passage, a gas switching valve can be arranged in the first gas passage to realize the switching of the blowing gas and the air tightness detection gas, the air pressure of the blowing gas is higher than that of the air tightness detection gas, until the sub-plate is contacted with the positioning surface, the blowing valve rod is pressed into the blowing valve rod accommodating cavity by the sub-plate, the air tightness detection through hole and the blowing through hole are blocked, the air pressure in the first gas passage is increased, and the air detection is successful, explaining the daughter board (the daughter board is provided with a workpiece) in place; when the daughter board contacted with the locating surface, the lower terminal surface of piston still had a certain distance with the bottom surface that the piston held the chamber, generally was about 1mm, can guarantee like this that the piston resets to and can guarantee to lock the blind rivet. In the whole processing process, the gas detection is always opened, and if the signal changes, the daughter board is separated, and the machine needs to be stopped immediately. After the processing is finished, firstly, the air detection of the air path is switched to scavenging, the chuck is loosened, and the sub-plate is separated. This workflow is complete.
After the processing is finished, when the daughter board is separated from the mother board, firstly, the gas detection in the first gas passage is switched to be purged, then, hydraulic oil is injected into the oil passage, the hydraulic oil pushes the piston to rise, the piston pushes the daughter board to rise, the daughter board is separated from the positioning surface, then the blowing valve rod rises so as to purge the positioning surface, and the daughter board is pushed upwards by the lifting function of the piston and separated from the positioning surface for a certain distance, as shown in fig. 3.
The latin locking mechanism and the supporting pad are made of high-quality tool steel materials, and are made of ultrahigh hardness and size stability through complex heat treatment for a plurality of times, so that the zero point positioning system is not easy to wear and has ultrahigh service life. Because the supporting pad is contacted with the positioning surface of the positioning protrusion, the daughter board does not need too high hardness, and the processing difficulty of the daughter board is reduced. The whole zero positioning system is low in height and small in required space. The requirement for the minimum thickness of a mother plate for installing the blind rivet locking mechanism is very small, and an oil port and an air path which are required to be opened by the chuck are also simple.
And an auxiliary blind rivet can be arranged, so that all parts of the blind rivet locking mechanism are connected together through the auxiliary blind rivet, and the installation is particularly simple as a whole. The auxiliary blind rivet can be removed during working, and the auxiliary blind rivet can play a dustproof role during installation when not in use.
According to the invention, the positioning bulge is arranged on the upper cover and is higher than the upper end surface of the upper cover, so that cutting fluid containing iron filings cannot flow into the air tightness detection through hole, meanwhile, the air blowing valve rod is arranged, and the air blowing valve rod can be lifted and used for blowing the positioning surface when blowing gas is injected into the first gas passage, so that the iron filings on the contact surface can be effectively removed, the cleaning of the positioning surface is ensured, the positioning surface can be cleaned without manpower, the intervention of workers in the whole working process is realized, and the automation is realized.
Further, owing to adopt the dish spring to reset the locking to the piston, the dish spring can provide powerful, very stable pulling down force, because can provide pulling down force under the normality, so used this positioning system at zero point's anchor clamps in the course of working, can be interrupted by urgent demand, resume processing afterwards, can not influence the precision. The disc spring is characterized by high rigidity, is used on a machine tool clamp, and can absorb strong external vibration when being machined and cut, so that the system is stable and reliable. The spring is clamped and the hydraulic pressure is released. The characteristic enables the chuck to tightly tension the workpiece even if the power is cut off accidentally during the operation of the clamp, and the workpiece cannot fall off.
Further, as shown in fig. 2, the air blowing valve rod 6 includes an air blowing valve rod body 63, one end of the air blowing valve rod body 63 is provided with a limiting portion 64 protruding outward in the radial direction, the air blowing valve rod installation cavity is a stepped hole, one end of the air outlet valve rod provided with the limiting portion is arranged at the large-diameter end of the stepped hole to limit the moving distance of the air blowing valve rod, a snap ring 26 is further arranged at the large-diameter end of the stepped hole to ensure that a gap is left between the air outlet valve rod and the first gas passage, so as to ensure that the gas is blown into the air blowing valve rod, the other end side wall is provided with a purge gas guide groove 65 for guiding the purge gas to the positioning surface, the purge gas guide groove 65 is an annular groove at the upper end portion of the air blowing valve rod body, the annular groove includes a first guide surface perpendicular to the axis of the air blowing valve rod and a second guide surface forming a certain angle with the axis of the air blowing valve rod, the purge gas blown out from the purge through hole is obliquely blown downward to the positioning surface by the first guide surface and the second guide surface, the air-tightness detection through hole 61 is communicated with the air storage cavity 66 and the upper end face 60 of the air-tightness detection valve rod body, the purging through hole 62 is communicated with the air storage cavity 66 and the purging gas guide groove 65, and the purging through holes 62 are circumferentially arranged on the air-tightness detection valve rod body so as to clean the whole positioning face conveniently.
Further, as shown in fig. 4 and 5, the device further comprises a piston in-place detection device 7, wherein a piston in-place detection device installation cavity 13 and a piston in-place detection passage 14 are arranged on the base 1;
the piston in-place detection device 7 is a switch valve;
specifically, in the present embodiment, the switching valve includes a valve body 70, a valve stem 71, a spring 72, a first seal ring 73, a second seal ring 74, and a stopper pin 75;
the valve rod 71 and the spring 72 are arranged in the valve body 70, a valve body passage 76 for opening and closing the switch valve is arranged on the valve body 70 and the valve rod 71, a first sealing ring 73 for sealing the piston installation cavity 10 and the piston in-place detection device installation cavity 13 and a second sealing ring 74 for sealing the piston in-place detection passages 14 on two sides of the valve body 70 are arranged on the valve body 70, in the embodiment, the first sealing ring is arranged at one end of the outer diameter of the valve body close to the piston accommodation cavity, the second sealing ring is obliquely sleeved on the outer diameter of the valve body, the limiting pin is arranged between the valve body 70 and the base 1, and the limiting pin can limit the relative rotation of the valve body and the base;
the switch valve is arranged in the piston in-place detection device installation cavity 13, one end of a valve rod 71 of the switch valve is arranged in the piston installation cavity 10, when the piston 3 is reset under the action of restoring force of the disc spring, the lower end surface of the piston 3 pushes the valve rod 71 to move, when the piston is reset to a set position (namely, when the daughter board is in close contact with the positioning surface), the switch valve is conducted to enable a piston in-place detection passage to be conducted, when the daughter board is connected with the mother board, gas detection is successful, but the rivet locking mechanism is not locked with the rivet, so that the clamping force of the rivet locking mechanism to the rivet is insufficient, the daughter board is not clamped, and problems occur in the processing process, the switch valve switches on, and then the system can judge whether taut through the atmospheric pressure that detects the piston detection way that targets in place to whether avoid because of the blind rivet causes the sub-board to press from both sides not tightly to cause the influence to processing for locking.
Further, as shown in fig. 6, the upper cover 2 is further provided with a second gas passage 25 for communicating the air blowing valve rod installation cavity 23 with the rivet locking mechanism accommodating cavity 21, and the second gas passage 25 is obliquely arranged towards the upper end face of the upper cover, so that in the process that the air blowing valve rod rises and sweeps the positioning surface, part of sweeping gas can be blown out from the upper end face of the upper cover obliquely through the second gas passage, so that impurities such as scrap iron and the like falling onto the upper end face of the upper cover are prevented from entering the rivet locking mechanism accommodating cavity, and the rivet is ensured to be locked.
Furthermore, one end, close to the piston installation cavity, of the oil passage is provided with a damping valve, the damping valve can ensure that hydraulic oil slowly enters the piston accommodating cavity, and the damping valve can ensure that pistons of the automatic zero positioning systems synchronously ascend and descend due to the fact that the mother board is provided with the automatic zero positioning systems, so that the piston ascending and descending stability is ensured, and the locking of the pair board blind rivet is ensured.
Furthermore, the blind rivet inserting end of the limiting end cover 50 is also provided with a conical guide surface 54, so that the blind rivet can be conveniently inserted into the blind rivet locking mechanism accommodating cavity.
Furthermore, in order to ensure the sealing performance between the blind rivet and the blind rivet locking mechanism, a plurality of sealing rings are arranged between the daughter board and the supporting pad, between the limiting end cover and the upper cover, between the limiting end cover and the blind rivet locking device containing cavity inner wall of the piston, and between the base and the upper cover, so as to form a closed sealing system.
The invention discloses a workpiece mother board, which comprises a mother board body and a plurality of automatic zero point positioning systems arranged on the mother board body.
Furthermore, a plurality of piston in-place detection passages of the automatic zero-point positioning system are communicated in series through pipelines, and the plurality of piston in-place detection passages are communicated in series through pipelines, so that the air passage is closed as long as any one piston does not run to the position, and the air passage is only the passage when all the pistons run to the set position, namely the zero-point positioning device works normally. The state of the gas circuit can be detected by feeding back to the system through the pressure switch, so that the working reliability of the system is ensured.
Fig. 7 is a schematic diagram of a control system of the automatic zero point positioning system disclosed by the present invention, which includes one path of hydraulic oil control and two paths of gas control, the hydraulic oil control includes a pressure limiting valve 91 and a solenoid valve 90 to control the piston lifting, one path of gas control includes a pressure limiting valve 91 and a solenoid valve 90 to control the piston in-place detection, and the other path of gas control includes a switching valve 92, a pressure limiting valve, a sensor, etc. to control the gas detection or purging.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An automatic zero positioning system is characterized by comprising a base, an upper cover, a piston, a disc spring, a blind rivet locking mechanism and an air blowing valve rod;
a piston installation cavity and an oil path channel are arranged in the base, the piston is arranged in the piston installation cavity, and hydraulic oil for driving the piston to lift can be injected into the oil path channel;
the upper cover is fixed on the base, a disc spring accommodating cavity is formed between the upper cover and the piston, and the disc spring is arranged in the disc spring accommodating cavity;
the upper cover and the piston are also provided with a blind rivet locking mechanism accommodating cavity, and the blind rivet locking mechanism is arranged in the blind rivet locking mechanism accommodating cavity;
the upper cover is also provided with a positioning bulge and an air blowing valve rod installation cavity, the positioning bulge is higher than the upper end surface of the upper cover, the upper end surface of the positioning bulge is a positioning surface, the air blowing valve rod is arranged in the air blowing valve rod installation cavity and can move up and down in the air blowing valve rod installation cavity, and the air blowing valve rod is provided with an air tightness detection through hole communicated with the upper end surface of the air blowing valve rod and the air blowing valve rod installation cavity and a purging through hole communicated with the side wall of the air blowing valve rod and the air blowing valve rod installation cavity and used for purging the positioning surface when the air blowing valve rod is lifted;
the air blowing valve rod installation cavity is communicated with the first air passage.
2. The automatic zero positioning system of claim 1, wherein the blowing valve rod comprises a blowing valve rod body, one end of the blowing valve rod body is provided with a limiting portion protruding outwards in the radial direction, the side wall of the other end of the blowing valve rod body is provided with a blowing gas guide groove used for guiding blowing gas to a positioning surface, a gas storage cavity is arranged in the blowing valve rod body, the gas tightness detection through hole is communicated with the gas storage cavity and the upper end surface of the blowing valve rod body, and the blowing through hole is communicated with the gas storage cavity and the blowing gas guide groove.
3. The automated zero positioning system according to claim 1, further comprising a piston in-position detection device, wherein the base is provided with a piston in-position detection device mounting cavity and a piston in-position detection passage;
the piston in-place detection device is a switch valve;
the switch valve is arranged in the piston in-place detection device installation cavity, one end of a valve rod of the switch valve is arranged in the piston installation cavity, when the piston is reset under the action of restoring force of the disc spring, the lower end face of the piston pushes the valve rod to move, and when the piston is reset to a set position, the switch valve is conducted to enable the piston in-place detection passage to be conducted.
4. The automated zero positioning system of claim 3, wherein the switch valve comprises a valve body, a valve stem, a spring, a first seal ring, a second seal ring, and a limit pin;
valve rod and spring are arranged in the valve body, be equipped with the valve body route that realizes that the ooff valve opens and close on valve body and the valve rod, be equipped with on the valve body and be used for going on sealed first sealing washer and be used for going on sealed second sealing washer to the piston detection device installation cavity that targets in place of piston installation cavity and piston both sides, be equipped with between valve body and the base the spacer pin.
5. The automatic zero point positioning system of claim 4, wherein the upper cover is further provided with a second gas passage communicating the air blowing valve rod mounting cavity and the rivet locking mechanism accommodating cavity, and an upper end surface of the upper cover is inclined from a gas outlet of the second gas passage.
6. The automated zero-point positioning system of claim 1, wherein the blind rivet locking mechanism comprises a limiting end cap, a steel ball seat, and an elastic member;
the elastic component is arranged in the blind rivet locking mechanism holds the chamber bottom and upper portion and steel ball seat butt, circumference is equipped with a plurality of steel ball accommodation holes on the lateral wall of steel ball seat, the steel ball is arranged in the steel ball accommodation hole, the blind rivet locking mechanism of piston holds and is equipped with the steel ball thrust groove on the inside wall in chamber, spacing end cover is fixed the blind rivet locking mechanism who covers and one end is arranged in the piston holds the intracavity.
7. The automated zero positioning system of claim 1, wherein a damping valve is disposed in the oil passage at an end thereof adjacent to the piston mounting cavity.
8. The automated zero-point positioning system of claim 6, wherein the blind rivet insertion end of the retaining cap is further provided with a tapered guide surface.
9. A workpiece master comprising a master body and a plurality of the automated zero positioning systems of any one of claims 1 to 8 disposed on the master body.
10. The workpiece master according to claim 9, wherein the piston-in-position detection passages of a plurality of the automated zero positioning systems are in series communication via a conduit.
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| CN202111584726.0A CN114131377B (en) | 2021-12-22 | 2021-12-22 | Automatic zero point positioning system and workpiece mother board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111584726.0A CN114131377B (en) | 2021-12-22 | 2021-12-22 | Automatic zero point positioning system and workpiece mother board |
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| CN114131377A true CN114131377A (en) | 2022-03-04 |
| CN114131377B CN114131377B (en) | 2024-05-17 |
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| CN114131377B (en) | 2024-05-17 |
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Address after: 116000 floor 1, No. 1-2-10, Tianfu street, Dalian Economic and Technological Development Zone, Liaoning Province Applicant after: Dalian Guangyang Automation System Co.,Ltd. Address before: 116000 no.27-b, Harbin Road, Dalian Economic and Technological Development Zone, Liaoning Province Applicant before: Dalian Guangyang Automatic Hydraulic System Co.,Ltd. |
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