CN114131377B - Automatic zero point positioning system and workpiece mother board - Google Patents
Automatic zero point positioning system and workpiece mother board Download PDFInfo
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- CN114131377B CN114131377B CN202111584726.0A CN202111584726A CN114131377B CN 114131377 B CN114131377 B CN 114131377B CN 202111584726 A CN202111584726 A CN 202111584726A CN 114131377 B CN114131377 B CN 114131377B
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- 238000007664 blowing Methods 0.000 claims abstract description 113
- 238000001514 detection method Methods 0.000 claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 20
- 239000003921 oil Substances 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 12
- 239000010720 hydraulic oil Substances 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 10
- 238000013016 damping Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 238000010926 purge Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 10
- 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 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- 230000014759 maintenance of location Effects 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
- 230000002265 prevention Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses an automatic zero point positioning system and a workpiece mother board, comprising a base, an upper cover, a piston, a disc spring, a blind rivet locking mechanism and a blowing valve rod; a piston mounting cavity is arranged in the base, a piston is arranged in the piston mounting cavity, an 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 surface 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 blow valve stem mounting cavity communicates with the first gas passage. The automatic zero point positioning system disclosed by the invention has a simple structure, can realize automatic purging of a 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 point positioning system and a workpiece mother board.
Background
In the fields of machine manufacturing, measuring, machine tools and robot automatic production lines, the benchmark is a concept which is very widely applied. The benchmark is the dotted plane from which the object upper level and relationship are determined. In the field of the mechanical industry, we will refer to the reference as zero point. In machining or measuring, the zero point of the workpiece must be determined first, and then machining or measuring must be performed based on the zero point. However, in the machining process, the parts cannot be kept still all the time, and the zero point needs to be aligned again from one working procedure to another working procedure and from one machine tool to another machine tool, 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, can ensure that parts are switched between stations, working procedures 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.
Zero-point positioning systems are particularly accurate, requiring high cleaning of the support surface, and any fine particle retention can lead to deviations in system accuracy, requiring careful cleaning. When manually operated, workers can clean the positioning support surface through the high-pressure air gun. However, when the device is used for automatic production, the cleaning of the positioning surface is a difficult problem because of unattended operation, and external air path 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 point positioning system, which aims to solve the problem that the existing zero point positioning system cannot realize automatic purging.
An automatic zero point positioning system comprises a base, an upper cover, a piston, a disc spring, a blind rivet locking mechanism and a blowing valve rod;
The base is provided with a piston mounting cavity and an oil path channel, the piston is arranged in the piston mounting 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 mounting cavity, the positioning bulge is higher than the upper end face of the upper cover, the upper end face of the positioning bulge is a positioning face, the air blowing valve rod is arranged in the air blowing valve rod mounting cavity and can move up and down in the air blowing valve rod mounting cavity, and the air blowing valve rod is provided with an air tightness detection through hole communicated with the upper end face of the air blowing valve rod and the air blowing valve rod mounting cavity and a blowing through hole communicated with the side wall of the air blowing valve rod and the air blowing valve rod mounting cavity and used for blowing the positioning face when the air blowing valve rod is lifted;
the blow valve stem mounting cavity communicates with a first gas passageway.
Further, the air blowing valve rod comprises an air blowing valve rod body, a radially outwards protruding limiting part is arranged at one end of the air blowing valve rod body, a blowing gas guide groove for guiding blowing gas to a positioning surface is formed in the side wall of the other end of the air blowing valve rod body, an air storage cavity is formed in the air blowing valve rod body, an air tightness detection through hole is communicated with the air storage cavity and the upper end face of the air blowing valve rod body, and the blowing through hole is communicated with the air storage cavity and the blowing gas guide groove.
Further, the device also comprises a piston in-place detection device, wherein a piston in-place detection device installation cavity and a piston in-place detection passage are arranged on the base;
the piston in-place detection device is a switch valve;
The switch valve is arranged in the installation cavity of the piston in-place detection device, one end of the valve rod of the switch valve is arranged in the installation cavity of the piston, when the piston is reset under the action of the 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 so that the piston in-place detection passage is 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;
The valve rod and the spring are arranged in the valve body, a valve body passage for opening and closing the switch valve is formed in the valve body and the valve rod, a first sealing ring for sealing a piston installation cavity and a piston in-place detection device installation cavity and a second sealing ring for sealing the in-place detection passage conduction of the pistons on two sides of the valve body are arranged on the valve body, and the limiting pin is arranged between the valve body and the base.
Further, a second gas passage communicated with the blowing valve rod mounting cavity and the blind rivet locking mechanism accommodating cavity is further formed in the upper cover, and the gas outlet of the second gas passage is inclined towards the upper end face of the upper cover.
Further, the blind rivet locking mechanism comprises a limiting end cover, a steel ball seat and an elastic piece;
The elastic piece is arranged at the bottom of the blind rivet locking mechanism accommodating cavity and the upper part of the elastic piece is in butt joint with the steel ball seat, a plurality of steel ball accommodating holes are circumferentially formed in the side wall of the steel ball seat, the steel balls are arranged in the steel ball accommodating holes, steel ball thrust grooves are formed in the inner side wall of the piston blind rivet locking mechanism accommodating cavity, and the limiting end cover is fixed on the upper cover, and one end of the limiting end cover is arranged in the piston blind rivet locking mechanism accommodating cavity.
Further, a damping valve is arranged at one end, close to the piston mounting cavity, of the oil path channel.
Further, the blind rivet insertion end of the limiting end cover is also provided with a conical guide surface.
A workpiece mother board comprises a mother board body and a plurality of automatic zero point positioning systems which are arranged on the mother board body and are disclosed by the invention.
Further, a plurality of piston in-place detection passages of the automatic zero point positioning system are communicated in series through pipelines.
The automatic zero point positioning system disclosed by the invention has the advantages that the automatic zero point 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 mounting cavity, and the air blowing valve rod is arranged in the air blowing valve rod mounting cavity and can move up and down, so that the automatic purging of the positioning surface of the positioning bulge in the rising process of the air blowing valve rod can be realized, the automation performance of a workbench is improved, and the overall 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 of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an automated zero point positioning system of the present disclosure with a daughter board mounted thereon;
FIG. 2 is a block diagram of a blow valve stem;
FIG. 3 is a block diagram of the sub-board separated from the motherboard;
FIG. 4 is a block diagram of a piston in-place detection device;
FIG. 5 is a cross-sectional view of the piston in-place detection device;
FIG. 6 is a schematic diagram of an automated zero-point positioning system of the present disclosure without a daughter board installed;
fig. 7 is a control diagram of the automated zero point positioning system of the present disclosure.
In the figure: 1. the device comprises a base, 10, a piston mounting cavity, 11, an oil path channel, 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 blind rivet locking mechanism accommodating cavity, 22, a positioning protrusion, 23, a 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 blind 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, a blowing valve rod, 60, a blowing valve rod upper end surface, 61, an air tightness detection through hole, 62, a blowing through hole, 63, a 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 valve rod, 72, a spring, 73, a first sealing ring, 74, a second sealing ring, 75, a limiting pin, 76, a passage, 80, a supporting pad, a valve body, a 92, a solenoid valve, a switching valve, a pressure limiting plate, a pressure valve, a 91 and a pressure valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The automatic zero point positioning system disclosed by the invention comprises a base 1, an upper cover 2, a piston 3, a disc spring 4, a blind rivet locking mechanism 5 and an air blowing valve rod 6, wherein the base is provided with a locking mechanism;
A piston mounting cavity 10 and an oil path channel 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 path channel 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, the lower end surface of the upper cover and the upper end surface of the piston are both processed with annular grooves to form a disc spring accommodating cavity, the upper end of the disc spring arranged in the disc spring accommodating cavity is abutted with the bottom of the annular groove on the upper cover, and the lower end of the disc spring is abutted with 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 rivet locking mechanism accommodating cavity is formed in the center of the piston, and 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 in butt joint with 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 rivet and the blind rivet locking mechanism can be arranged according to requirements, and the blind rivet can be a round blind rivet, a diamond blind rivet or a non-positioning blind rivet;
The upper cover 2 is also provided with a plurality of positioning protrusions 22 and blowing valve rod mounting cavities 23, the number of the positioning protrusions is 4 in the figure, the positioning protrusions can be set according to the requirement, the plurality of blowing valve rod mounting cavities 23 are communicated with each other, 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-shaped structure, the upper end face of each positioning protrusion 22 is a positioning face, the blowing valve rod 6 is arranged in the blowing valve rod mounting cavity 23 and can move up and down in the blowing valve rod mounting cavity 23, and the blowing valve rod 6 is provided with an air tightness detection through hole 61 communicated with the upper end face 60 of the blowing valve rod and the blowing valve rod mounting cavity 23 and a blowing through hole 62 communicated with the side wall of the upper part of the blowing valve rod and the blowing valve rod mounting cavity 23 for blowing the positioning face when the blowing valve rod is lifted;
The purge valve stem mounting chamber 23 communicates with the first gas passage 12.
The working process of the automatic zero point positioning system disclosed by the invention is as follows: the automatic zero point positioning system disclosed by the invention is fixed on a motherboard of a machine tool, a plurality of blind pins 80 are fixed on a daughter board 82 of the machine tool, in the embodiment, a support pad 81 is fixed on the lower end face of the daughter board, when the daughter board is required to be installed on the motherboard, hydraulic oil is injected into an oil path channel 11, the hydraulic oil drives a piston to rise and compresses a disc spring until the upper end face of the piston is abutted against the lower end face of an upper cover, in the rising process of the piston, purge gas is injected into a first gas channel 12, the purge gas drives a purge valve rod to rise, and in the rising process of the purge valve rod, the purge gas purges the upper end face (positioning face) of a positioning boss so as to keep the positioning face clean; meanwhile, the upper end face of the steel ball seat is abutted with 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 sub-board is arranged on the mother board, namely, the blind rivet of the sub-board is inserted into the blind rivet locking mechanism accommodating cavity, and the steel ball is in a floating state at the moment, so that the blind rivet can be conveniently inserted into the blind rivet locking mechanism accommodating cavity, and the bottom end surface 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 sub-board; then, hydraulic oil is discharged, the piston pushes the piston downwards under the action of restoring force of the disc spring, the daughter board gradually approaches the positioning surface along with the descending of the piston until the lower end surface of the daughter board contacts with the positioning surface, the steel ball gradually acts with the steel ball thrust groove in the descending process of the piston to realize locking of the steel ball on the blind rivet, in the embodiment, the piston thrust groove is an arc surface, and meanwhile, in the descending process of the daughter board, air tightness detection gas is injected into the first gas passage, a gas switching valve can be arranged in the first gas passage to realize switching of the blowing gas and the air tightness detection gas, the pressure of the blowing gas is higher than that of the air tightness detection gas, until the daughter board contacts with the positioning surface, the blowing valve rod is pressed into the blowing valve rod accommodating cavity, the air tightness detection through hole and the blowing through hole are blocked, the air pressure in the first gas passage rises, and the air detection is successful, and the fact that the daughter board (a workpiece is arranged on the daughter board) is in place is shown; when the daughter board contacts with the positioning surface, the lower end surface of the piston is a certain distance from the bottom surface of the piston accommodating cavity, which is generally about 1mm, so that the piston can be ensured to be reset in place and the blind rivet can be ensured to be locked. In the whole processing process, the gas check is always opened, and if the signal changes, the sub-board is separated, and the machine needs to be stopped immediately. After the processing is finished, the gas circuit gas detection is switched into scavenging, the chuck is loosened, and the sub-boards are separated. This workflow is completed.
When the separation of the daughter board and the mother board is to be realized after the processing is finished, firstly, the gas check in the first gas passage is switched to purge, then, hydraulic oil is injected into the oil passage, the hydraulic oil pushes the piston to lift, the piston pushes the daughter board to lift, the daughter board is separated from the positioning surface, and then the blowing valve rod is lifted so as to purge the positioning surface, and the lifting function of the piston pushes the daughter board upwards to be separated from the positioning surface by 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 the Latin locking mechanism and the supporting pad are subjected to multiple complex heat treatments, so that the Latin locking mechanism and the supporting pad have ultrahigh hardness and dimensional stability, so that a zero point positioning system is not easy to wear and has ultrahigh service life. The supporting pad is contacted with the positioning surface of the positioning protrusion, so that the daughter board does not need to have high hardness, and the processing difficulty of the daughter board is reduced. The whole zero point positioning system has low height and small space. The minimum requirement for the thickness of the motherboard for installing the blind rivet locking mechanism is small, and the oil port and the air path required by the chuck are simpler.
Auxiliary blind rivets can be further arranged, and all parts of the blind rivet locking mechanism are connected together through the auxiliary blind rivets, so that the blind rivet locking mechanism is particularly simple to install as a whole. The auxiliary blind rivet can be removed during operation, and the auxiliary blind rivet can be installed to play a role in dust prevention when the auxiliary blind rivet is not used.
According to the invention, as the positioning bulge is arranged on the upper cover and is higher than the upper end surface of the upper cover, the cutting fluid containing the scrap iron cannot flow into the air tightness detection through hole, and meanwhile, the air blowing valve rod is arranged, and can lift and purge the positioning surface when the blowing gas is injected into the first gas passage, so that the scrap iron on the contact surface can be effectively removed, the cleaning of the positioning surface is ensured, the positioning surface is not required to be cleaned manually, no staff intervention in the whole working process is realized, and the automation is realized.
Further, because the disc spring is adopted to reset and lock the piston, the disc spring can provide strong and very stable downward pulling force, and the clamp using the zero point positioning system can be interrupted by urgent requirements in the processing process because the downward pulling force can be provided in a normal state, and then the processing is resumed, so that the precision is not affected. The disc spring has the characteristics of high rigidity, is used on a machine tool clamp, and can absorb strong external vibration when machining and cutting are performed, so that the system is stable and reliable. The spring is clamped and the hydraulic pressure is released. This feature allows the clamp to work while the clamp is tightly tightened against the workpiece, even when the clamp is accidentally de-energized, without causing the workpiece to fall out.
Further, as shown in fig. 2, the blowing valve rod 6 includes a blowing valve rod body 63, a radially outward protruding limit portion 64 is provided at one end of the blowing valve rod body 63, the blowing valve rod mounting cavity is a stepped hole, one end of the blowing valve rod provided with the limit portion is provided at a large diameter end of the stepped hole to limit the moving distance of the blowing valve rod, a snap ring 26 is further provided at the large diameter of the stepped hole to ensure that a gap is left between the blowing valve rod and the first gas passage, and further to ensure that gas blows into the blowing valve rod, a blowing gas guide groove 65 for guiding blowing gas to a positioning surface is provided at the other end side wall, the blowing gas guide groove 65 is an annular groove at the upper end of the blowing valve rod body, the annular groove includes a first guide surface perpendicular to the axis of the blowing valve rod and a second guide surface at an angle to the axis of the blowing valve rod, the blowing gas blown out by the blowing through hole is blown down to the positioning surface by the first guide surface and the second guide surface, a gas storage cavity 66 is provided in the valve rod body 63, the gas tightness detection through hole 61 is communicated with the gas storage cavity 66 and the upper end surface 60 of the blowing valve rod, the through hole 62 is communicated with the blowing gas guide groove 65, and the blowing gas is located on the whole blowing valve rod so as to facilitate the blowing and positioning the blowing gas.
Further, as shown in fig. 4 and 5, the device also comprises a piston in-place detection device 7, wherein the base 1 is provided with a piston in-place detection device mounting cavity 13 and a piston in-place detection passage 14;
The piston in-place detection device 7 is a switch valve;
specifically, in the present embodiment, the on-off 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 mounting cavity 10 and the piston in-place detection device mounting 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 this embodiment, the first sealing ring is arranged at one end of the outer diameter of the valve body, which is close to the piston accommodating 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 on-off valve is arranged in the piston in-place detection device mounting cavity 13, one end of the valve rod 71 of the on-off valve is arranged in the piston mounting cavity 10, when the piston 3 is reset under the action of the restoring force of the disc spring, the lower end face of the piston 3 pushes the valve rod 71 to move, and when the piston is reset to the set position (namely, when the sub-board is in close contact with the positioning surface), the on-off valve is conducted so that the piston in-place detection passage is conducted, when the sub-board is connected with the mother board, the air detection is successful, but the blind rivet locking mechanism and the blind rivet are not locked, the clamping force of the blind rivet locking mechanism on the blind rivet is insufficient, the blind rivet is further not clamped tightly, and the problem is caused in the processing process.
Further, as shown in fig. 6, the upper cover 2 is further provided with a second gas passage 25 which is communicated with the blowing valve rod installation cavity 23 and the pull pin locking mechanism accommodating cavity 21, and the air outlet of the second gas passage 25 is inclined towards the upper end face of the upper cover.
Further, a damping valve is arranged at one end, close to the piston installation cavity, of the oil path channel, hydraulic oil can slowly enter the piston accommodation cavity due to the damping valve, and the synchronous ascending and descending of the pistons of the automatic zero positioning systems can be guaranteed by the damping valve due to the fact that the automatic zero positioning systems are arranged on the motherboard, so that the lifting stability of the pistons is guaranteed, and locking of the sub-board blind rivet is guaranteed.
Further, the blind rivet insertion end of the limiting end cap 50 is further provided with a tapered guide surface 54, which can facilitate insertion of the blind rivet into the blind rivet locking mechanism receiving cavity.
Further, in order to ensure the tightness 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.
A workpiece mother board comprises a mother board body and a plurality of automatic zero point positioning systems which are arranged on the mother board body and are disclosed by the invention.
Further, the piston in-place detection channels of the automatic zero point positioning system are communicated in series through the pipelines, and as the piston in-place detection channels are communicated in series through the pipelines, the gas circuit is in a closed state only if any one piston cannot operate in place, and only if all pistons operate to a set position, namely the zero point positioning device works normally, the gas circuit is the channel. The state of the air channel can be detected by feeding back the state to the system through the pressure switch, so that the working reliability of the air channel is ensured.
Fig. 7 is a schematic diagram of a control system of the automatic zero positioning system disclosed by the invention, which comprises one path of hydraulic oil control and two paths of gas control, wherein the hydraulic oil control comprises a pressure limiting valve 91 and an electromagnetic valve 90 for controlling the lifting of a piston, one path of gas control comprises the pressure limiting valve 91 and the electromagnetic valve 90 for controlling the in-place detection of the piston, and the other path of gas control comprises a switching valve 92, the pressure limiting valve, a sensor and the like for controlling the gas detection or the purging.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. An automatic zero point 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;
The base is provided with a piston mounting cavity and an oil path channel, the piston is arranged in the piston mounting 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 mounting cavity, the positioning bulge is higher than the upper end face of the upper cover, the upper end face of the positioning bulge is a positioning face, the air blowing valve rod is arranged in the air blowing valve rod mounting cavity and can move up and down in the air blowing valve rod mounting cavity, and the air blowing valve rod is provided with an air tightness detection through hole communicated with the upper end face of the air blowing valve rod and the air blowing valve rod mounting cavity and a blowing through hole communicated with the side wall of the air blowing valve rod and the air blowing valve rod mounting cavity and used for blowing the positioning face when the air blowing valve rod is lifted;
the blowing valve rod mounting cavity is communicated with the first gas passage;
The device comprises a base, a piston in-place detection device mounting cavity and a piston in-place detection passage are arranged on the base;
the piston in-place detection device is a switch valve;
The switch valve is arranged in the installation cavity of the piston in-place detection device, one end of the valve rod of the switch valve is arranged in the installation cavity of the piston, when the piston is reset under the action of the 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 so that the piston in-place detection passage is conducted.
2. The automatic zero point positioning system according to claim 1, wherein the air blowing valve rod comprises an air blowing valve rod body, one end of the air blowing valve rod body is provided with a limiting part protruding outwards in a radial direction, the side wall of the other end of the air blowing valve rod body is provided with a blowing gas guide groove for guiding blowing gas to a positioning surface, an air storage cavity is arranged in the air blowing valve rod body, the air tightness detection through hole is communicated with the air storage cavity and the upper end face of the air blowing valve rod body, and the blowing through hole is communicated with the air storage cavity and the blowing gas guide groove;
the air blowing valve rod mounting cavity is internally provided with a clamping ring used for enabling a certain gap to be reserved between the air blowing valve rod and the first air passage, and the gap is used for enabling the first air passage to be communicated with the air storage cavity.
3. The automated zero positioning system of claim 2, wherein the on-off valve comprises a valve body, a valve stem, a spring, a first seal ring, a second seal ring, and a stop pin;
The valve rod and the spring are arranged in the valve body, a valve body passage for opening and closing the switch valve is arranged on the valve body and the valve rod, a first sealing ring for sealing a piston installation cavity and a piston in-place detection device installation cavity and a second sealing ring for sealing the piston in-place detection passages on two sides of the valve body are arranged on the valve body, and the limiting pin is arranged between the valve body and the base; the limiting pin is used for limiting the relative rotation of the valve body and the base.
4. The automatic zero point positioning system according to claim 3, wherein the upper cover is further provided with a second gas passage which communicates with the blowing valve rod installation cavity and the blind rivet locking mechanism accommodating cavity, and an upper end face of the upper cover is inclined towards an air outlet of the second gas passage.
5. The automated zero point positioning system of claim 1, wherein the blind rivet locking mechanism comprises a limit end cap, a steel ball seat, and an elastic member;
The elastic piece is arranged at the bottom of the blind rivet locking mechanism accommodating cavity and the upper part of the elastic piece is in butt joint with the steel ball seat, a plurality of steel ball accommodating holes are circumferentially formed in the side wall of the steel ball seat, the steel balls are arranged in the steel ball accommodating holes, steel ball thrust grooves are formed in the inner side wall of the piston blind rivet locking mechanism accommodating cavity, and the limiting end cover is fixed on the upper cover, and one end of the limiting end cover is arranged in the piston blind rivet locking mechanism accommodating cavity.
6. The automated zero positioning system of claim 1, wherein a damping valve is disposed in the oil passage at an end of the oil passage adjacent the piston mounting chamber.
7. The automated zero positioning system of claim 5, wherein the blind rivet insertion end of the limit cap is further provided with a tapered guide surface.
8. A workpiece master comprising a master body and a plurality of automated zero point positioning systems according to any one of claims 1 to 7 disposed on the master body.
9. The workpiece motherboard of claim 8, wherein the piston in-place detection paths of the plurality of automated zero-point positioning systems are in series communication via a pipeline.
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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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| CN202111584726.0A CN114131377B (en) | 2021-12-22 | 2021-12-22 | Automatic zero point positioning system and workpiece mother board |
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| CN114131377A CN114131377A (en) | 2022-03-04 |
| CN114131377B true CN114131377B (en) | 2024-05-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115401523B (en) * | 2022-08-31 | 2024-01-09 | 东风设备制造有限公司 | Double-sided clamp with one-way air inlet and two-sided independent action and no-material air detection device |
| CN116037563B (en) * | 2023-01-13 | 2023-06-06 | 北京航臻科技有限公司 | Chip removing device for zero point positioning system |
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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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