CN111941025A - Automatic nut burying equipment - Google Patents

Automatic nut burying equipment Download PDF

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Publication number
CN111941025A
CN111941025A CN202010790986.2A CN202010790986A CN111941025A CN 111941025 A CN111941025 A CN 111941025A CN 202010790986 A CN202010790986 A CN 202010790986A CN 111941025 A CN111941025 A CN 111941025A
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Prior art keywords
nut
pressing
push rod
linear vibrator
feeding
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Granted
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CN202010790986.2A
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Chinese (zh)
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CN111941025B (en
Inventor
陈进源
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Dongguan Dingjun Plastic Mould Co ltd
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Dongguan Dingjun Plastic Mould Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/001—Article feeders for assembling machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
    • B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7861—In-line machines, i.e. feeding, joining and discharging are in one production line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Jigging Conveyors (AREA)

Abstract

The invention discloses automatic nut burying equipment, which comprises a nut bin, a feeding assembly, a piezoelectric linear vibrator, a bottom plate, a control center, a nut pressing-in device, a material preparing platform and a material channel, wherein the nut pressing-in device is arranged on the left side of the material preparing platform and is connected with the material channel, the piezoelectric linear vibrator is arranged between the material channel and the bottom plate, the left end of the material channel is connected with the nut bin through the feeding assembly, and the nut bin, the feeding assembly, the piezoelectric linear vibrator, the nut pressing-in device and the material preparing platform are all arranged on the upper surface of the bottom plate and are connected with the control center; the material preparation platform comprises a main support frame, a limiting air cylinder assembly, an auxiliary support frame, a side opening, a limiting column and a guide hole. The nuts to be pressed in are prepared in advance through the material preparation platform, the nuts to be pressed in enter the storage bin after the action of the nut pressing device, the nuts are automatically buried, the arrangement is neat and fast, and the automation degree is high.

Description

Automatic nut burying equipment
Technical Field
The invention relates to the technical field of nut burying equipment, in particular to automatic nut burying equipment.
Background
The nut is a nut, is screwed together with a bolt or a screw rod to play a fastening role, can be connected with the bolt by the inner thread with the same specification, and elements required by all production and manufacturing machines are divided into carbon steel, stainless steel, nonferrous metal and the like according to different materials, so that the market demand of the nut is large.
Patent No. CN201821035221.2 provides a nut burying device based on material pipe feeding. It includes: the feeding device comprises a conveying material pipe, the inlet end of the conveying material pipe is connected with the feeding device, and nuts entering the conveying material pipe are automatically conveyed to the heating device under the action of gravity; the heating device is arranged below the feeding device and comprises a preheating mechanism and a heating mechanism which are sequentially arranged, and nuts entering the heating device are sequentially preheated by the preheating mechanism and secondarily heated by the heating mechanism under the action of gravity and then are automatically conveyed to the distributing device; the material distributing device is arranged below the heating device and at least used for conveying the loaded nuts to the material guiding device; and the material guide device is at least used for guiding the nut into the nut hole and pressing and fixing the nut. The nut, provided via the vibrating disk, enters the feed pipe. However, in the above patent, the nuts cannot be arranged neatly, and for nuts with a long length, the material guiding speed is slow, and the material guiding efficiency is low.
Disclosure of Invention
The invention aims to provide automatic nut embedding equipment, which is characterized in that nuts to be pressed in are prepared in advance through a material preparation platform, the nuts to be pressed in enter a storage bin after being acted by a nut pressing device, the automatic nut embedding is completed, the arrangement is neat and rapid, the automation degree is high, and the problems in the prior art are solved.
In order to achieve the purpose, the invention provides the following technical scheme: the automatic nut burying equipment comprises a nut bin, a feeding assembly, a piezoelectric linear vibrator, a bottom plate, a control center, a nut pressing-in device, a material preparation platform and a material channel, wherein the nut pressing-in device is arranged on the left side of the material preparation platform and is connected with the material channel, the piezoelectric linear vibrator is arranged between the material channel and the bottom plate, the left end of the material channel is connected with the nut bin through the feeding assembly, and the nut bin, the feeding assembly, the piezoelectric linear vibrator, the nut pressing-in device and the material preparation platform are all arranged on the upper surface of the bottom plate and are connected with the control center;
the material preparation platform comprises a main support frame, a limiting air cylinder assembly, an auxiliary support frame, side openings, limiting columns and guide holes, wherein the auxiliary support frame is installed in the middle of the main support frame, the side openings are formed in the edges of two sides of the auxiliary support frame, the guide holes with two through ends are formed above the side openings, the limiting air cylinder assembly is installed in each side opening, and two limiting columns are fixedly connected to an air rod of each limiting air cylinder assembly through bolts;
the nut press-in device comprises a press-in air cylinder assembly, a base, a vertical plate, a sliding rail, a mounting plate, a feeding cavity, an air cylinder push rod and an end plate, wherein the base is fixedly connected onto the bottom plate through a bolt, the vertical plate is fixedly connected onto the base through a bolt, the mounting plate is slidably connected onto the upper end of the vertical plate through a sliding rail, the feeding cavity is formed in the upper surface of the front end of the mounting plate, the end plate is welded at the rear end of the mounting plate, the press-in air cylinder assembly is mounted on the end plate, the air cylinder push rod is fixedly connected onto the front end of.
Preferably, the feeding assembly comprises a feeding groove, the left end of the feeding groove is communicated with the nut bin, and the right end of the feeding groove is connected with the material channel.
Preferably, a nut is arranged between the two limiting columns.
Preferably, the left side opening of feeding chamber meets with the material way right side, and passes through bolt fixedly connected with baffle on the feed chute.
Preferably, the nut feed bin is circular, and has seted up spiral helicine silo on the inner wall, silo and feed chute interconnect.
Preferably, the width of the feeding groove is consistent with that of the material channel.
Preferably, all install a plurality of screw that are the straight line and distribute on slide rail and the riser, connect the bolt soon between mounting panel and the riser.
Preferably, the piezoelectric linear vibrator has a model number of HY-ZB 80.
Preferably, the control center (5) is provided with a PID digital regulator, the PID digital regulator is connected with the piezoelectric linear vibrator (3), and the PID digital regulator controls the input frequency of the piezoelectric linear vibrator (3) by the following formula:
Figure 452528DEST_PATH_IMAGE002
in the above formula, the first and second carbon atoms are,
Figure 100002_DEST_PATH_IMAGE003
representing the frequency output function of the PID digital regulator;
Figure 270311DEST_PATH_IMAGE004
a proportional parameter representing a PID digital regulator;
Figure 100002_DEST_PATH_IMAGE005
an input signal deviation representing a frequency;
Figure 100002_DEST_PATH_IMAGE007
indicating an adjustment time;
Figure 800650DEST_PATH_IMAGE008
represents an integration time constant;
Figure 100002_DEST_PATH_IMAGE009
represents a differential time constant; wherein
Figure 177011DEST_PATH_IMAGE004
、
Figure 589538DEST_PATH_IMAGE008
And
Figure 86378DEST_PATH_IMAGE009
setting by a compact method;
and according to the calculation result of the formula, the conveying rate of the piezoelectric linear vibrator (3) is adjusted by controlling the input frequency of the piezoelectric linear vibrator (3).
Preferably, the control center (5) is connected with and controls the nut pressing device (6) in the following control mode:
firstly, a dynamic model of the cylinder push rod (67) is established, the dynamic model is regarded as a three-degree-of-freedom vibration system, and the impact force required by nut pressing is calculated by adopting the following formula according to the Dalnbell principle:
Figure 267961DEST_PATH_IMAGE010
in the above formula, the first and second carbon atoms are,
Figure 100002_DEST_PATH_IMAGE011
representing the instantaneous impact force of the push rod of the cylinder at the moment t;
Figure 51109DEST_PATH_IMAGE012
represents a natural constant;
Figure 100002_DEST_PATH_IMAGE013
the ratio of the material damping coefficient to the mass of the cylinder push rod is represented;
Figure 419774DEST_PATH_IMAGE007
represents a time of day;
Figure 579360DEST_PATH_IMAGE014
the pressing coefficient is expressed and is determined according to the material of an object needing to be pressed into the nut;
Figure 100002_DEST_PATH_IMAGE015
representing the operating frequency of a push rod of the air cylinder;
Figure 881028DEST_PATH_IMAGE016
representing the natural frequency of operation of the cylinder push rod;
Figure DEST_PATH_IMAGE017
representing the material damping ratio of the cylinder push rod;
then, the air pressure to be supplied by the press-in cylinder assembly (61) is calculated by using the following formula:
Figure 100002_DEST_PATH_IMAGE019
in the above formula, the first and second carbon atoms are,
Figure 710444DEST_PATH_IMAGE020
the air pressure value required to be provided by the press-in air cylinder assembly at the time t is represented;
Figure 691038DEST_PATH_IMAGE011
representing the instantaneous impact force of the push rod of the cylinder at the moment t;
Figure DEST_PATH_IMAGE021
the area of the air pressure borne by the push rod of the air cylinder is shown;
the control center (5) controls the air pressure provided by the pressing cylinder assembly (61) according to the calculation result.
Compared with the prior art, the invention has the following beneficial effects:
according to the automatic nut burying device, the nuts to be pressed are prepared in advance through the material preparing platform, the nuts are pressed into the air cylinder assembly after entering the feeding cavity to drive the air cylinder push rod to extend forwards, the nuts are extruded, the nuts move leftwards to enter the material channel, the nuts in the material channel are orderly arranged under the vibration influence of the piezoelectric linear vibrator, the nuts at the left end of the material channel are extruded after the next nut is pressed into the material channel from the right end, the nuts enter the material bin after passing through the feeding groove of the feeding assembly, the automatic nut burying is completed, the arrangement is orderly and fast, and the automation degree is high.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a side view of the present invention;
FIG. 4 is a top view of the present invention;
FIG. 5 is a block diagram of the stock preparation platform of the present invention;
fig. 6 is a structural view of a nut pressing device according to the present invention.
In the figure: 1. a nut bin; 2. a feed assembly; 21. a feed chute; 3. a piezoelectric linear vibrator; 4. a base plate; 5. a control center; 6. a nut press-in device; 61. pressing in the cylinder assembly; 62. a base; 63. a vertical plate; 64. a slide rail; 65. mounting a plate; 66. a feed cavity; 67. a cylinder push rod; 68. an end plate; 69. a baffle plate; 7. a material preparation platform; 71. a main supporting frame; 72. a limiting cylinder assembly; 73. a secondary support frame; 74. a side port; 75. a limiting column; 76. a guide hole; 8. and (6) material channel.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1 to 4, the automatic nut burying device includes a nut bin 1, a feeding assembly 2, a piezoelectric linear vibrator 3, a bottom plate 4, a control center 5, a nut pressing device 6, a material preparing platform 7 and a material channel 8, wherein the left side of the material preparing platform 7 is provided with the nut pressing device 6, the nut pressing device 6 is connected with the material channel 8, the material channel 8 is linear, the upper ends of the two sides of the material channel 8 are provided with inward protruding edgings for limiting nuts entering the material channel 8, so as to prevent nuts entering the material channel 8 from jumping the material channel 8 under the vibration action, the piezoelectric linear vibrator 3 is installed between the material channel 8 and the bottom plate 4, the left end of the material channel 8 is connected with the nut bin 1 through the feeding assembly 2, the piezoelectric linear vibrator 3 is HY-ZB80, the nuts in the material channel 8 are orderly arranged under the vibration influence of the piezoelectric linear vibrator 3, after the next nut is extruded into the material channel 8 from the right end, the nut at the left end of the material channel 8 is extruded out, the nut enters the material bin after passing through the feeding groove 21 of the feeding assembly 2, the nut is automatically embedded, the nut is arranged in order and quickly, the automation degree is high, the nut bin 1 is circular, a spiral material groove is formed in the inner wall of the nut bin, the material groove is connected with the feeding groove 21, the nut bin 1, the feeding assembly 2, the piezoelectric linear vibrator 3, the nut pressing-in device 6 and the material preparation platform 7 are all installed on the upper surface of the bottom plate 4 and connected with the control center 5, the control center 5 is a control system, the control system can be a PLC control system and is used for controlling equipment to automatically operate, the automation degree is high, the nut with longer length can replace the traditional manual operation for stacking the nut, the time and labor are saved, and the; the feeding assembly 2 comprises a feeding groove 21, the feeding groove 21 is consistent with the width of the material channel 8, the difference between the width and the nut length is not more than two millimeters, the left end of the feeding groove 21 is communicated with the nut bin 1, and the right end of the feeding groove is connected with the material channel 8.
Referring to fig. 5, the material preparation platform 7 includes a main support frame 71, a limiting cylinder assembly 72, an auxiliary support frame 73, side ports 74, limiting columns 75 and guide holes 76, the auxiliary support frame 73 is installed in the middle of the main support frame 71, the side ports 74 are opened on the two side edges of the auxiliary support frame 73, the guide holes 76 with two through ends are opened above the side ports 74, the limiting cylinder assembly 72 is installed in the side ports 74, and two limiting columns 75 are fixedly connected to the air rod of the limiting cylinder assembly 72 through bolts; the nuts are placed between the two limiting columns 75, a single nut is placed between the two limiting columns 75 to serve as a nut to be pressed in, when the nut to be pressed in needs to enter the feeding cavity 66, the limiting cylinder assembly 72 drives the limiting columns 75 to move downwards along the guide holes 76, the nut is not limited by the limiting columns 75 and can move, and the advance material preparation is achieved.
Referring to fig. 6, the nut pressing device 6 includes a pressing cylinder assembly 61, a base 62, a vertical plate 63, a sliding rail 64, a mounting plate 65, a feeding cavity 66, a cylinder push rod 67 and an end plate 68, the base 62 is fixedly connected to the bottom plate 4 through a bolt, the vertical plate 63 is fixedly connected to the base 62 through a bolt, the mounting plate 65 is slidably connected to the upper end of the vertical plate 63 through the sliding rail 64, a plurality of screw holes distributed in a straight line are respectively installed on the sliding rail 64 and the vertical plate 63, a bolt is screwed between the mounting plate 65 and the vertical plate 63, the bolt screwed between the mounting plate 65 and the vertical plate 63 is disassembled, the mounting plate 65 can slide up and down along the sliding rail 64, so as to adjust the height of the feeding cavity 66, the nut pressing devices 6 with different heights can be mutually butted with the material preparing platforms 7 and the nut bins 1 with different heights, the, install cylinder assembly 61 of impressing on the end plate 68, the front end fixedly connected with cylinder push rod 67 of cylinder assembly 61 of impressing, cylinder push rod 67 sliding connection feeding chamber 66, the left side opening of feeding chamber 66 meets with the material way 8 right side, and through bolt fixedly connected with baffle 69 on the feed chute 21, dismouting bolt adjusting baffle 69 is located the position of feeding chamber 66, the size in adjustable feeding chamber 66, and then the nut that adapts to different length is impressed, install baffle 69 at feeding chamber 66, cylinder assembly 61 that impresses drives actuating cylinder push rod 67 and stretches forward after the nut gets into feeding chamber 66, the extrusion nut, make the nut move the entering material way 8 to the left side, the longer nut of length can get into in the material way 8 fast, so that transportation on next step, thereby realize the mesh of burying fast to the nut.
In summary, the following steps: according to the automatic nut burying device, nuts to be pressed in are prepared in advance through the material preparing platform 7, the nuts enter the feeding cavity 66 and then are pressed into the air cylinder assembly 61 to drive the air cylinder push rod 67 to extend forwards, the nuts are squeezed, the nuts are enabled to move leftwards and enter the material channel 8, the nuts in the material channel 8 are affected by vibration of the piezoelectric linear vibrator 3 to be arranged orderly, the nuts at the left end of the material channel 8 are squeezed out after the next nut is squeezed into the material channel 8 from the right end, the nuts enter the material bin after passing through the feeding groove 21 of the material feeding assembly 2, automatic nut burying is completed, the arrangement is orderly and fast, and the automation degree is high.
In one embodiment, the control center (5) is provided with a PID digital regulator, the PID digital regulator is connected with the piezoelectric linear vibrator (3), and the PID digital regulator controls the input frequency of the piezoelectric linear vibrator (3) through the following formula:
Figure 60839DEST_PATH_IMAGE002
in the above formula, the first and second carbon atoms are,
Figure 420277DEST_PATH_IMAGE003
representing the frequency output function of the PID digital regulator;
Figure 217331DEST_PATH_IMAGE004
a proportional parameter representing a PID digital regulator;
Figure 826167DEST_PATH_IMAGE005
an input signal deviation representing a frequency;
Figure 94600DEST_PATH_IMAGE007
indicating an adjustment time;
Figure 105281DEST_PATH_IMAGE008
represents an integration time constant;
Figure 73237DEST_PATH_IMAGE009
represents a differential time constant; wherein
Figure 638211DEST_PATH_IMAGE004
、
Figure 349815DEST_PATH_IMAGE008
And
Figure 215002DEST_PATH_IMAGE009
setting by a compact method;
and according to the calculation result of the formula, the conveying rate of the piezoelectric linear vibrator (3) is adjusted by controlling the input frequency of the piezoelectric linear vibrator (3).
The working principle and the beneficial effects of the technical scheme are as follows: the scheme adopts a PID digital regulator, and the deviation is linearly combined according to proportion, integral and differential through proportional, integral and differential control to form a control quantity so as to control the piezoelectric linear vibrator of the controlled object; the PID digital regulator has simple structure and stronger robustness and adaptability; adjusting and setting do not depend on a specific model of the system; the piezoelectric linear vibrator to be controlled can meet the actual requirement by using the conventional PID control, and the use cost is low.
In one embodiment, the control center (5) is connected with and controls the nut pressing device (6) in the following way:
firstly, a dynamic model of the cylinder push rod (67) is established, the dynamic model is regarded as a three-degree-of-freedom vibration system, and the impact force required by nut pressing is calculated by adopting the following formula according to the Dalnbell principle:
Figure 947335DEST_PATH_IMAGE010
in the above formula, the first and second carbon atoms are,
Figure 530763DEST_PATH_IMAGE011
representing the instantaneous impact force of the push rod of the cylinder at the moment t;
Figure 780479DEST_PATH_IMAGE012
represents a natural constant;
Figure 234594DEST_PATH_IMAGE013
the ratio of the material damping coefficient to the mass of the cylinder push rod is represented;
Figure 544353DEST_PATH_IMAGE007
represents a time of day;
Figure 615077DEST_PATH_IMAGE014
the pressing coefficient is expressed and is determined according to the material of an object needing to be pressed into the nut;
Figure 261959DEST_PATH_IMAGE015
representing the operating frequency of a push rod of the air cylinder;
Figure 101739DEST_PATH_IMAGE016
representing the natural frequency of operation of the cylinder push rod;
Figure 582399DEST_PATH_IMAGE017
representing the material damping ratio of the cylinder push rod;
then, the air pressure to be supplied by the press-in cylinder assembly (61) is calculated by using the following formula:
Figure 343681DEST_PATH_IMAGE019
in the above formula, the first and second carbon atoms are,
Figure 200779DEST_PATH_IMAGE020
the air pressure value required to be provided by the press-in air cylinder assembly at the time t is represented;
Figure 895065DEST_PATH_IMAGE011
representing the instantaneous impact force of the push rod of the cylinder at the moment t;
Figure 140102DEST_PATH_IMAGE021
the area of the air pressure borne by the push rod of the air cylinder is shown;
the control center (5) controls the air pressure provided by the pressing cylinder assembly (61) according to the calculation result.
The working principle and the beneficial effects of the technical scheme are as follows: the scheme is that a dynamic model of the cylinder push rod is established, the dynamic model is regarded as a three-degree-of-freedom vibration system, an impact force calculation formula of the cylinder push rod is obtained according to the Dalabel principle, and then the air pressure and impact force relational expression of the pressed air cylinder assembly is used for obtaining the air pressure numerical value required to be provided by the pressed air cylinder assembly at a certain moment, so that the air pressure provided by the pressed air cylinder assembly is controlled in real time, the purpose of pressing the nut is achieved, meanwhile, the pressed excess is prevented, and the energy consumption is saved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. Automatic bury nut equipment, include nut feed bin (1), feeding subassembly (2), piezoelectricity linear vibrator (3), bottom plate (4), control center (5), nut push in device (6), platform (7) and material way (8) of prepareeing material, its characterized in that: a nut pressing-in device (6) is arranged on the left side of the material preparation platform (7), the nut pressing-in device (6) is connected with a material channel (8), a piezoelectric linear vibrator (3) is arranged between the material channel (8) and the bottom plate (4), the left end of the material channel (8) is connected with a nut stock bin (1) through a feeding assembly (2), and the nut stock bin (1), the feeding assembly (2), the piezoelectric linear vibrator (3), the nut pressing-in device (6) and the material preparation platform (7) are all arranged on the upper surface of the bottom plate (4) and are connected with a control center (5);
the material preparation platform (7) comprises a main support frame (71), a limiting air cylinder assembly (72), an auxiliary support frame (73), side openings (74), limiting columns (75) and guide holes (76), wherein the auxiliary support frame (73) is installed in the middle of the main support frame (71), the side openings (74) are formed in the edges of two sides of the auxiliary support frame (73), the guide holes (76) with two through ends are formed above the side openings (74), the limiting air cylinder assembly (72) is installed in the side openings (74), and two limiting columns (75) are fixedly connected to an air rod of the limiting air cylinder assembly (72) through bolts;
the nut pressing-in device (6) comprises a pressing-in air cylinder assembly (61), a base (62), a vertical plate (63), a sliding rail (64), a mounting plate (65), a feeding cavity (66), an air cylinder push rod (67) and an end plate (68), wherein the base (62) is fixedly connected with the bottom plate (4) through a bolt, the vertical plate (63) is fixedly connected with the base (62) through a bolt, the upper end of the vertical plate (63) is slidably connected with the mounting plate (65) through the sliding rail (64), the feeding cavity (66) is formed in the upper surface of the front end of the mounting plate (65), the end plate (68) is welded at the rear end of the mounting plate, the pressing-in air cylinder assembly (61) is installed on the end plate (68), the air cylinder push rod (67) is fixedly connected with the front end of the pressing-.
2. The automatic nut burying device as recited in claim 1, wherein: the feeding assembly (2) comprises a feeding groove (21), the left end of the feeding groove (21) is communicated with the nut bin (1), and the right end of the feeding groove is connected with the material channel (8) mutually.
3. The automatic nut burying device as recited in claim 1, wherein: and a nut is arranged between the two limiting columns (75).
4. The automatic nut burying device as recited in claim 1, wherein: the left side of the feeding cavity (66) is opened and connected with the right side of the material channel (8), and a baffle plate (69) is fixedly connected to the feeding groove (21) through a bolt.
5. The automatic nut burying device as recited in claim 1, wherein: nut feed bin (1) is circular, and has seted up spiral helicine silo on the inner wall, silo and feed chute (21) interconnect.
6. The automatic nut burying device as recited in claim 1, wherein: the width of the feed chute (21) is consistent with that of the material channel (8).
7. The automatic nut burying device as recited in claim 1, wherein: a plurality of screw holes which are distributed linearly are arranged on the sliding rail (64) and the vertical plate (63), and bolts are screwed between the mounting plate (65) and the vertical plate (63).
8. The automatic nut burying device as recited in claim 1, wherein: the piezoelectric linear vibrator (3) is HY-ZB 80.
9. The automatic nut burying device as recited in claim 1, wherein: the control center (5) is provided with a PID digital regulator, the PID digital regulator is connected with the piezoelectric linear vibrator (3), and the PID digital regulator controls the input frequency of the piezoelectric linear vibrator (3) through the following formula:
Figure 759179DEST_PATH_IMAGE002
in the above formula, the first and second carbon atoms are,
Figure DEST_PATH_IMAGE003
representing the frequency output function of the PID digital regulator;
Figure 482285DEST_PATH_IMAGE004
a proportional parameter representing a PID digital regulator;
Figure DEST_PATH_IMAGE005
an input signal deviation representing a frequency;
Figure 499919DEST_PATH_IMAGE006
indicating an adjustment time;
Figure DEST_PATH_IMAGE007
represents an integration time constant;
Figure 682901DEST_PATH_IMAGE008
represents a differential time constant; wherein
Figure 418776DEST_PATH_IMAGE004
、
Figure 617676DEST_PATH_IMAGE007
And
Figure 880030DEST_PATH_IMAGE008
setting by a compact method;
and according to the calculation result of the formula, the conveying rate of the piezoelectric linear vibrator (3) is adjusted by controlling the input frequency of the piezoelectric linear vibrator (3).
10. The automatic nut burying device as recited in claim 1, wherein: the control center (5) is connected with and controls the nut pressing-in device (6) in the following control mode:
firstly, a dynamic model of the cylinder push rod (67) is established, the dynamic model is regarded as a three-degree-of-freedom vibration system, and the impact force required by nut pressing is calculated by adopting the following formula according to the Dalnbell principle:
Figure DEST_PATH_IMAGE009
in the above formula, the first and second carbon atoms are,
Figure 138973DEST_PATH_IMAGE010
representing the instantaneous impact force of the push rod of the cylinder at the moment t;
Figure DEST_PATH_IMAGE011
represents a natural constant;
Figure 690040DEST_PATH_IMAGE012
the ratio of the material damping coefficient to the mass of the cylinder push rod is represented;
Figure 427052DEST_PATH_IMAGE006
represents a time of day;
Figure DEST_PATH_IMAGE013
the pressing coefficient is expressed and is determined according to the material of an object needing to be pressed into the nut;
Figure 684858DEST_PATH_IMAGE014
representing the operating frequency of a push rod of the air cylinder;
Figure DEST_PATH_IMAGE015
indicating operation of cylinder push-rodsA natural frequency;
Figure 442599DEST_PATH_IMAGE016
representing the material damping ratio of the cylinder push rod;
then, the air pressure to be supplied by the press-in cylinder assembly (61) is calculated by using the following formula:
Figure 153066DEST_PATH_IMAGE018
in the above formula, the first and second carbon atoms are,
Figure DEST_PATH_IMAGE019
the air pressure value required to be provided by the press-in air cylinder assembly at the time t is represented;
Figure 693769DEST_PATH_IMAGE010
representing the instantaneous impact force of the push rod of the cylinder at the moment t;
Figure 163671DEST_PATH_IMAGE020
the area of the air pressure borne by the push rod of the air cylinder is shown;
the control center (5) controls the air pressure provided by the pressing cylinder assembly (61) according to the calculation result.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113172360A (en) * 2021-05-07 2021-07-27 深圳市利和兴股份有限公司 Automatic welding equipment for mobile phone middle frame nut
CN113352626A (en) * 2021-07-06 2021-09-07 珠海捷派自动化科技有限公司 Automatic hot pressing equipment

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CN202828768U (en) * 2012-09-29 2013-03-27 合肥飞柯自动化科技有限公司 Discharging device for valve-spring retainer after assembling
KR20150062067A (en) * 2013-11-28 2015-06-05 주식회사 창원볼트 device for assembling a PVC washer
CN107717433A (en) * 2017-10-27 2018-02-23 苏州卓盛鑫智能科技有限公司 O-ring erecting device
CN207861353U (en) * 2018-07-10 2018-09-14 厦门斯普机电有限公司 A kind of relay collecting equipment
CN209522242U (en) * 2018-11-21 2019-10-22 国泰精密机件（无锡）有限公司 A kind of small part automatic array machine

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Publication number Priority date Publication date Assignee Title
CN202828768U (en) * 2012-09-29 2013-03-27 合肥飞柯自动化科技有限公司 Discharging device for valve-spring retainer after assembling
KR20150062067A (en) * 2013-11-28 2015-06-05 주식회사 창원볼트 device for assembling a PVC washer
CN107717433A (en) * 2017-10-27 2018-02-23 苏州卓盛鑫智能科技有限公司 O-ring erecting device
CN207861353U (en) * 2018-07-10 2018-09-14 厦门斯普机电有限公司 A kind of relay collecting equipment
CN209522242U (en) * 2018-11-21 2019-10-22 国泰精密机件（无锡）有限公司 A kind of small part automatic array machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113172360A (en) * 2021-05-07 2021-07-27 深圳市利和兴股份有限公司 Automatic welding equipment for mobile phone middle frame nut
CN113172360B (en) * 2021-05-07 2021-11-23 深圳市利和兴股份有限公司 Automatic welding equipment for mobile phone middle frame nut
CN113352626A (en) * 2021-07-06 2021-09-07 珠海捷派自动化科技有限公司 Automatic hot pressing equipment

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