CN113251801B - Quick sintering device for diamond cutting sheet production - Google Patents
Quick sintering device for diamond cutting sheet production Download PDFInfo
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- CN113251801B CN113251801B CN202110383080.3A CN202110383080A CN113251801B CN 113251801 B CN113251801 B CN 113251801B CN 202110383080 A CN202110383080 A CN 202110383080A CN 113251801 B CN113251801 B CN 113251801B
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- 238000005245 sintering Methods 0.000 title claims abstract description 77
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 42
- 239000010432 diamond Substances 0.000 title claims abstract description 42
- 238000005520 cutting process Methods 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 102
- 239000010439 graphite Substances 0.000 claims abstract description 102
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 101
- 238000004321 preservation Methods 0.000 claims abstract description 53
- 238000003825 pressing Methods 0.000 claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 230000003139 buffering effect Effects 0.000 claims description 44
- 230000001105 regulatory effect Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 10
- 238000000429 assembly Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 239000000428 dust Substances 0.000 description 4
- 230000008646 thermal stress Effects 0.000 description 4
- 238000005275 alloying Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 prefabricated board Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/0016—Chamber type furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D5/00—Supports, screens, or the like for the charge within the furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/0016—Chamber type furnaces
- F27B2017/0091—Series of chambers, e.g. associated in their use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
- F27D2003/0059—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising tracks, e.g. rails and wagon
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
- F27D2003/0068—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising clamps or tongs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The invention relates to a rapid sintering device for diamond cutting sheet production, which comprises a first preheating chamber, a second preheating chamber, a first heat preservation chamber, a sintering chamber and a second heat preservation chamber which are sequentially connected, wherein the first preheating chamber, the second preheating chamber, the first heat preservation chamber, the sintering chamber and the second heat preservation chamber are communicated and form a closed working space, a pressing machine and an automatic feeding mechanism are arranged in the first preheating chamber, the automatic feeding mechanism carries out vertical and sequential interval feeding on a plurality of graphite gaskets and a plurality of cutting sheet pressed blanks pressed by the pressing machine, and the bottoms of the first preheating chamber, the second preheating chamber, the first heat preservation chamber, the sintering chamber and the second heat preservation chamber are provided with communicated tracks, and the automatic feeding mechanism sequentially passes through the second preheating chamber, the first heat preservation chamber and the sintering chamber to the second heat preservation chamber along the tracks. The invention has the following advantages: realize the rapid high-quality sintering and ensure the structural strength of the diamond cutting blade.
Description
Technical field:
The invention belongs to the field of diamond cutting sheet sintering, and particularly relates to a rapid sintering device for diamond cutting sheet production.
Background
The diamond saw blade is one kind of cutting tool and is used widely in stone, concrete, prefabricated board, ceramic, road and other hard and brittle material. In order to ensure the structural strength and cutting hardness of the diamond tip, metal powder containing diamond powder is generally uniformly mixed and then pressed on the outer circumference of a substrate to form a diamond compact, and then sintered to form a diamond saw blade.
At present, automatic and rapid pressing of diamond cutting sheets is realized through a pressing machine, pressed green compacts are placed manually, the green compacts and graphite gaskets are distributed on a support frame at intervals, the green compacts and the graphite gaskets are convenient to bond with each other in the subsequent sintering process, and the support frame is placed in a sintering chamber to perform sintering operation in a unified manner, so that the sintering method has the following defects: 1. the pressed compact is stored until being sintered, a certain time is needed, dust is easy to be stained, dust on the surface of the compact is attached to the surface of the diamond cutting sheet after being sintered, and therefore the cutting sharpness and the structural strength of the diamond cutting sheet are affected, and the time is long; 2. the sintering temperature is generally uniform between 850 ℃ and 870 ℃, and the temperature gradient and the self density of the powder compact in the sintering temperature rising process act, so that local high temperature appears, and the thermal stress is concentrated, thereby influencing the structural strength of the diamond cutting sheet.
The invention comprises the following steps:
the invention aims to overcome the defects, and provides a rapid sintering device for producing a diamond cutting sheet, which realizes rapid high-quality sintering and ensures the structural strength of the diamond cutting sheet.
The aim of the invention is achieved by the following technical scheme: the rapid sintering device for producing the diamond cutting sheets comprises a first preheating chamber, a second preheating chamber, a first heat preservation chamber, a sintering chamber and a second heat preservation chamber which are sequentially connected, wherein the first preheating chamber, the second preheating chamber, the first heat preservation chamber, the sintering chamber and the second heat preservation chamber are communicated and form a closed working space, a pressing machine and an automatic feeding mechanism are arranged in the first preheating chamber, the automatic feeding mechanism carries out vertical and sequential interval feeding on a plurality of graphite gaskets and a plurality of cutting sheet pressed blanks after the pressing by the pressing machine, and the bottoms of the first preheating chamber, the second preheating chamber, the first heat preservation chamber, the sintering chamber and the second heat preservation chamber are provided with communicated tracks; the temperature of the first preheating chamber is 80-100 ℃, the temperature of the second preheating chamber is 400-500 ℃, the temperature of the first heat preservation chamber is 500-520 ℃, the temperature of the sintering chamber is 800-850 ℃, and the temperature of the second heat preservation chamber is 500-520 ℃.
The invention further improves that: the automatic feeding mechanism comprises a plurality of sliding seats which are arranged on the track and slide along the track, a supporting rod which is longitudinally arranged above the sliding seats, a pressed compact grabbing piece which is arranged on one side of the supporting rod, and a graphite gasket grabbing piece which is arranged on the other side of the supporting rod, wherein both sides of the supporting rod are provided with buffer protection supporting components for buffering the pressed compact and the graphite gasket;
The outer circumference of the lower side of the supporting rod is sleeved with a thin disc, a first buffer spring is arranged between the thin disc and the base of the sliding seat, the first buffer spring is sleeved on the outer circumference of the supporting rod, the pressed compact vertically falls onto the buffer protection supporting assembly along with the pressed compact grabbing piece and the graphite gasket grabbing piece to be buffered for the first time, and the buffer protection supporting assembly drives the graphite gasket to fall onto the thin disc to be buffered for the second time.
The invention further improves that: the buffer protection support assembly comprises a telescopic column and a lifting rotary cylinder arranged at the upper end of the telescopic column, an electric push rod for driving the telescopic column to stretch up and down is arranged in the telescopic column, a second buffer spring is arranged above the driving end of the lifting rotary cylinder, and the upper end of the second buffer spring is connected with a support elastic sheet.
The invention further improves that: the support shell fragment includes first horizontal part, second horizontal part and arranges the circular arc portion between first horizontal part and the second horizontal part in, and the opening of circular arc portion sets up, and the upper end and the bottom of circular arc portion of second buffer spring are connected.
The invention further improves that: the device comprises a pressed compact grabbing piece and a graphite gasket grabbing piece, wherein the pressed compact grabbing piece and the graphite gasket grabbing piece both comprise a supporting frame and a transverse sliding rail arranged above the supporting frame, the transverse sliding rail of the pressed compact grabbing piece and the transverse sliding rail of the graphite gasket grabbing piece are of an integrated sliding rail structure, a first sliding block for grabbing the pressed compact and a second sliding block for grabbing the graphite gasket are embedded on the transverse sliding rail, a first air cylinder capable of pushing the first sliding block to reciprocate on the transverse sliding rail is arranged at one side end of the transverse sliding rail, a second air cylinder capable of pushing the second sliding block to reciprocate on the transverse sliding rail is arranged at the other side end of the transverse sliding rail, a third air cylinder is arranged below the sliding block, a sucker is arranged at the lower end of the third air cylinder, a plurality of through holes are formed in the sucker, an air suction pipe is embedded in each through hole, and a vacuum pump is connected with the air suction pipe jointly, and the vacuum pump is used for exhausting or deflating through the air suction pipe, so that the feeding or discharging of the pressed compact or the graphite gasket is realized.
The invention further improves that: the lower extreme of bracing piece extends to in the sliding seat, has the drive motor of drive bracing piece circumference pivoted in the sliding seat, and the cover is equipped with the bearing on the outer circumference that bracing piece and sliding seat contacted.
The invention further improves that: the two side end faces of the rail are provided with racks, the extending direction of the racks is consistent with the extending direction of the rail, the lower end of the sliding seat is provided with rollers which walk on the rail, the two side ends of the sliding seat are connected with speed regulating motors, the driving shafts of the speed regulating motors are fixedly sleeved with gears, the gears are meshed with the corresponding racks, and the speed regulating motors rotate to drive the gears to be meshed with the racks for transmission so as to drive the rollers to walk on the rail.
The invention further improves that: any support frame is provided with a control unit which is electrically connected with the third cylinder, the first cylinder, the vacuum pump, the lifting rotary cylinder, the electric push rod, the speed regulating motor and the driving motor in sequence, and the first preheating chamber, the second preheating chamber, the first heat preservation chamber, the sintering chamber and the second heat preservation chamber are respectively provided with a heating element and a temperature sensor, and the heating elements and the temperature sensors are electrically connected with the uniform control unit.
The rapid sintering method for the production of the diamond cutting sheet comprises the following specific steps:
S1, stacking pressed blanks after being pressed sequentially from top to bottom by a pressing machine, and stacking a plurality of graphite gaskets sequentially from top to bottom;
S2, the control unit sends out an opening signal instruction to a speed regulating motor on a sliding seat at the front side, so that a gear rotates and walks on a corresponding rack until the sliding seat at the front side is arranged at the middle position of two buffer protection support assemblies, the control unit sends out a stopping signal instruction to the speed regulating motor on the sliding seat, at the moment, the control unit sends out a jacking signal instruction to an electric push rod of the buffer protection support assemblies, and sends out a rotating signal instruction to a lifting rotating cylinder, and the rotating signal instruction is sent to a corresponding support rod, so that support elastic sheets of the two buffer support assemblies are close to two sides of the support rod;
S3, the control unit sends a jacking signal instruction to the second cylinder of the graphite gasket grabbing piece and the second cylinder of the pressed compact grabbing piece, so that the sucker of the graphite gasket grabbing piece is arranged right above the graphite gasket, and the sucker of the pressed compact grabbing piece is arranged right above the pressed compact;
S4, the control unit firstly sends a downward jacking signal instruction to a third cylinder of the graphite gasket grabbing piece, and simultaneously sends an air suction signal instruction to a vacuum pump of the graphite gasket grabbing piece, so that a sucking disc of the graphite gasket grabbing piece sucks the graphite gasket at the upper side, the control unit then sends an upward telescopic signal instruction to the third cylinder of the graphite gasket grabbing piece, and then sends a jacking signal instruction to a second cylinder of the graphite gasket grabbing piece, so that the sucking disc sucked with the graphite gasket is arranged right above a supporting rod, at the moment, the control unit sends an air discharge signal instruction to a vacuum pump of the graphite gasket grabbing piece, the graphite gasket falls and is sleeved on the supporting rod, and is protected by buffering of two buffering protection supporting components, at the moment, the control unit sends a resetting signal instruction to the second cylinder and the third cylinder of the graphite gasket grabbing piece, and at the same time, the control unit sends a shrinking signal instruction to an electric push rod of the buffering protection supporting component, and moves downwards, and after the electric push rod shrinks by a certain stroke distance, the control unit sends a resetting signal instruction to a lifting rotary cylinder of the two buffering protection supporting components, so that the supporting spring sheet and the graphite gasket fall off along with gravity and are separated to the graphite gasket and fall to a buffering spring sheet;
S5, the control unit sends a downward jacking signal instruction to a third cylinder of the compacting grabbing piece, and simultaneously sends an air suction signal instruction to a vacuum pump of the compacting grabbing piece, so that a sucker of the compacting grabbing piece sucks the upper compacting piece, the control unit then sends an upward telescopic signal instruction to the third cylinder of the compacting grabbing piece, and then sends a jacking signal instruction to a first cylinder of the compacting grabbing piece, so that the sucker sucked with the compacting piece is arranged right above a supporting rod, at the moment, the control unit sends an air discharge signal instruction to the vacuum pump of the compacting grabbing piece, the compacting piece falls and is sleeved on the supporting rod and is protected by buffering of two buffering protection supporting components, at the moment, the control unit sends a reset signal instruction to the first cylinder and the third cylinder of the compacting grabbing piece, and simultaneously, the control unit sends a signal instruction to an electric push rod of the buffering protection supporting component, the two buffering protection supporting components support the compacting piece and moves downwards, and after the electric push rod contracts a certain stroke distance, the control unit sends a reset signal instruction to the lifting and rotating of the two buffering protection supporting components, so that the two buffering protection supporting components are separated from the first buffering supporting piece and the compacting piece and the compact by the self-buffering elastic piece, and the buffering elastic piece falls down along with the falling spring;
S6, sequentially repeating the steps S4 and S5 to enable a plurality of pressed blanks and a plurality of graphite gaskets to be distributed at intervals up and down, when the number of the pressed blanks on the support rod at the front side reaches 10-15, the control unit sends an opening signal instruction to the speed regulating motor on the sliding seat at the front side and sends an opening signal instruction to the driving motor on the sliding seat at the front side, so that the support rod on the sliding seat at the front side slides forwards and simultaneously realizes autorotation, and the control unit sends signals to the pressed blank grabbing piece, the graphite gasket grabbing piece and the buffer protection support assembly to reset each;
S7, the control unit sends a signal instruction for starting to the speed regulating motor of the sliding seat at the rear side, and the steps S2 to S6 are repeated to realize automatic feeding of a plurality of sliding seats;
S8, pressing blanks on the sliding seats in the first preheating chamber realize constant-temperature pressing and preheating, in the second preheating chamber realize rapid heating and preheating, and finally slide into the second heat-preserving chamber to be cooled and heat-preserved after heat preservation in the first heat-preserving chamber to be sintered in the sintering chamber.
Compared with the prior art, the invention has the following advantages:
1. The rapid sintering device adopts the first preheating chamber, the second preheating chamber, the first heat preservation chamber, the sintering chamber and the second heat preservation chamber, and the pressing machine is arranged in the first preheating chamber to realize simultaneous pressing and sintering preheating, compared with the diamond powder pressing at normal temperature, the pressed powder porosity is low at a certain heat degree, the heated bearing pressure area of the pressed compact is increased, so that the pressed compact density is high, and the pressed diamond cutting blade directly passes through the first preheating chamber, the second preheating chamber, the first heat preservation chamber and the sintering chamber to the second heat preservation chamber through the automatic feeding mechanism, thereby rapidly completing the integrated work of pressing and sintering, avoiding the influence of dust on the surface of the diamond pressed compact after traditional cold pressing on the structural strength of the diamond cutting blade in the subsequent sintering process, and ensuring the sintering quality while having high degree of automation.
2. The invention avoids the traditional single sintering temperature, adopts a sintering mode of slowly preheating and insulating the temperature after high-temperature sintering in an insulating box, eliminates the temperature gradient of the pressed compact in the heating process in time, reduces the concentration of thermal stress in the pressed compact, and ensures the sintering strength of the diamond cutting sheet.
3. The compact grabbing piece and the graphite gasket grabbing piece drop the compact or the graphite gasket onto the supporting rod, are subjected to short-distance buffer protection of the buffer protection supporting component, drive the compact or the graphite gasket to move downwards onto the thin disc of the supporting rod along with the shrinkage of the buffer protection supporting component, and then pass through the secondary buffer protection of the first buffer spring at the lower end of the thin disc, so that the compact is prevented from being damaged or worn due to the collision between the compact and the graphite gasket in the feeding process of the compact falling onto the supporting rod, and the structural strength of the diamond cutting sheet after sintering is further improved.
Description of the drawings:
fig. 1 is a schematic structural view of a rapid sintering device for producing diamond cutting chips according to the present invention.
Fig. 2 is a schematic structural diagram of the automatic feeding mechanism in fig. 1.
Fig. 3 is an enlarged schematic view of structure B in fig. 2.
Fig. 4 is a cross-sectional view of the structure of fig. 2 taken along A-A.
Fig. 5 is an enlarged schematic view of structure C in fig. 4.
Reference numerals in the drawings:
1-a first preheating chamber, 2-a second preheating chamber, 3-a first heat preservation chamber, 4-a sintering chamber, 5-a second heat preservation chamber, 6-a pressing machine, 7-a green compact, 8-a track, 9-an automatic feeding mechanism and 10-a graphite gasket;
91-sliding seat, 92-supporting rod, 93-pressed compact grabbing piece, 94-graphite gasket grabbing piece, 95-buffering protection supporting component, 96-thin disc, 97-first buffering spring, 98-driving motor, 99-bearing, 910-rack, 911-roller, 912-speed regulating motor and 913-gear;
931-supporting frame, 932-transverse sliding rail, 933-first sliding block, 934-first cylinder, 935-third cylinder, 936-sucker, 937-through hole, 938-air suction pipe, 939-vacuum pump, 9310-second sliding block, 9311-second cylinder;
951-telescopic column, 952-lifting rotary cylinder, 953-electric push rod, 954-second buffer spring, 955-supporting spring, 9551-first horizontal part, 9552-second horizontal part and 9553-circular arc part.
The specific embodiment is as follows:
the present invention will be further described in detail with reference to the following examples and drawings for the purpose of enhancing the understanding of the present invention, which examples are provided for the purpose of illustrating the present invention only and are not to be construed as limiting the scope of the present invention.
In the description of the present invention, it should be understood that the term "orientation" or "positional relationship" as used herein with respect to the orientation or positional relationship shown in the drawings is merely for convenience of description and to simplify the description, and does not indicate or imply that the structures or units referred to must have a particular orientation and therefore should not be construed as limiting the invention.
In the present invention, unless otherwise specifically defined and limited, terms such as "connected," "provided," and "having" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, directly connected, and connected via an intermediate medium, so that it is possible for those skilled in the art to understand the basic meaning of the terms in the present invention according to circumstances.
As shown in fig. 1, an embodiment of a rapid sintering device for producing diamond cutting sheets of the present invention comprises a first preheating chamber 1, a second preheating chamber 2, a first heat preservation chamber 3, a sintering chamber 4 and a second heat preservation chamber 5 which are sequentially connected, wherein the first preheating chamber 1, the second preheating chamber 2, the first heat preservation chamber 3, the sintering chamber 4 and the second heat preservation chamber 5 are communicated and form a closed working space, a pressing machine 6 and an automatic feeding mechanism 9 are arranged in the first preheating chamber 1, the automatic feeding mechanism 9 carries out vertical and sequential interval feeding on a plurality of graphite gaskets 10 and a plurality of cutting sheet pressed blanks pressed by the pressing machine 6, and a communicated track 8 is arranged at the bottoms of the first preheating chamber 1, the second preheating chamber 2, the first heat preservation chamber 3, the sintering chamber 4 and the second heat preservation chamber 5, and the automatic feeding mechanism 9 sequentially passes through the second preheating chamber 2, the first heat preservation chamber 3 and the sintering chamber 4 along the track 8 and is arranged in the second heat preservation chamber 5; the temperature of the first preheating chamber 1 is 80-100 ℃, the temperature of the second preheating chamber 2 is 400-500 ℃, the temperature of the first heat preservation chamber 3 is 500-520 ℃, the temperature of the sintering chamber 4 is 800-850 ℃, and the temperature of the second heat preservation chamber 5 is 500-520 ℃.
The rapid sintering device adopts the first preheating chamber 1, the second preheating chamber 2, the first heat preservation chamber 3, the sintering chamber 4 and the second heat preservation chamber 5, and the pressing machine 6 is arranged in the first preheating chamber 1, so that pressing and sintering are performed simultaneously, compared with diamond powder pressing at normal temperature, the pressed powder porosity is low at a certain heat degree, the heated bearing pressure area of a pressed compact is increased, the pressed compact density is high, and the pressed diamond cutting sheet directly passes through the first preheating chamber 1, the second preheating chamber 2, the first heat preservation chamber 3 and the sintering chamber 4 to the second heat preservation chamber 5 in sequence through the automatic feeding mechanism 9, so that the integrated work of pressing and sintering is rapidly completed, the influence of dust on the surface of the diamond pressed compact after traditional cold pressing on the structural strength of the diamond cutting sheet in the subsequent sintering process is avoided, the degree of automation is high, and meanwhile, the sintering quality is ensured.
The invention avoids the traditional single sintering temperature, adopts a sintering mode of slowly preheating and insulating the temperature after high-temperature sintering by an insulating box, eliminates the temperature gradient of the pressed compact 7 in the heating process in time, reduces the concentration of thermal stress in the pressed compact 7, and ensures the sintering strength of the diamond cutting sheet.
During preheating, the oxide on the surface of the powder particles starts to be reduced, the adsorption gas is gradually sucked out, the low-melting-point components in the powder start to melt, the temperature can be quickly increased in the preheating section, the sintering time can be shortened, and a large amount of electric quantity is saved; in the process of preheating to the heat preservation section, the oxidation film on the surface of the metal particles is fully reduced for activating metal atoms, so that the temperature difference caused by the rapid temperature rise of the preheating section can be balanced, and the internal thermal stress is eliminated; in the heat preservation process after sintering, the alloying elements are fully diffused, and the alloying process is fully performed.
It should be noted that the press 6 in the present application is a cold pressing device for processing diamond saw blades, which is applied by the company and the 2019 12 month 16 day application, and application number 201922243571.9, and implements integrated powder pressing and feeding and discharging operations, and further implements integrated working procedures of pressing and sintering in combination with the rapid sintering device in the present application.
Further, as shown in fig. 2, the automatic feeding mechanism 9 includes a plurality of sliding seats 91 disposed on the rail 8 and sliding along the rail 8, a support rod 92 disposed longitudinally above the sliding seats 91, a compact grabbing member 93 disposed at one side of the support rod 92, and a graphite gasket grabbing member 94 disposed at the other side of the support rod 92, wherein both sides of the support rod 92 are provided with buffer protection support assemblies 95 for buffering the compact 7 and the graphite gasket 10;
The lower side outer circumference of the supporting rod 92 is sleeved with a thin disc 96, a first buffer spring 97 is arranged between the thin disc 96 and the base of the sliding seat 91, the first buffer spring 97 is sleeved on the outer circumference of the supporting rod 92, the pressed compact 7 vertically falls onto the buffer protection supporting assembly 95 along with the pressed compact grabbing piece 93 and the graphite gasket 10 along with the graphite gasket grabbing piece 94 to be buffered for the first time, and the buffer protection supporting assembly 95 drives the pressed compact 7 to descend onto the thin disc 96 to be buffered for the second time.
Further, as shown in fig. 4, the buffer protection support assembly 95 includes a telescopic column 951 and a lifting rotary cylinder 952 disposed at an upper end of the telescopic column 951, an electric push rod 953 driving the telescopic column 951 to extend and retract up and down is disposed in the telescopic column 951, a second buffer spring 954 is disposed above a driving end of the lifting rotary cylinder 952, and a supporting spring 955 is connected to an upper end of the second buffer spring 954.
It should be noted that the lifting rotary cylinder 952 is a commercial product, and can achieve lifting and 90 ° rotation within a certain stroke, which is known as the prior art in the art, and the specific structure thereof is not described in detail, and the change of the rotation angle of the lifting rotary cylinder 952 in the application can achieve loading or unloading of the compact 7 or the graphite gasket 10, and the lifting rotary cylinder 952 can be replaced by a rotary cylinder in the application, and can also achieve loading or unloading of the compact 7 or the graphite gasket 10, so the application is not limited.
The pressed compact grabbing piece 93 and the graphite gasket grabbing piece 94 drop the pressed compact 7 or the graphite gasket 10 onto the supporting rod 92, are subjected to short-distance buffer protection by the buffer protection supporting component 95, drive the pressed compact 7 or the graphite gasket 10 to move downwards onto the thin disc 96 of the supporting rod 92 along with the shrinkage of the buffer protection supporting component 95, and then pass through the rebuffer protection of the first buffer spring 97 at the lower end of the thin disc 96, so that the pressed compact 7 and the graphite gasket 10 are prevented from being damaged or worn due to collision in the feeding process of the pressed compact 7 and the graphite gasket 10 falling onto the supporting rod 92, and the structural strength of the sintered diamond cutting sheet is further improved.
Further, as shown in fig. 5, the supporting spring 955 includes a first horizontal portion 9551, a second horizontal portion 9552, and an arc portion 9553 disposed between the first horizontal portion 9551 and the second horizontal portion 9552, an opening of the arc portion 9553 is upward, and an upper end of the second buffer spring 954 is connected to a bottom of the arc portion 9553.
The supporting spring 955 in the application adopts a structure mode of combining a horizontal part and an arc part, so that the supporting spring 955 has higher elastic strength, and is combined with the second buffer spring 954, thereby greatly improving the buffer protection of the pressed compact 7 and the graphite gasket 10 falling onto the buffer protection support assembly 95.
Further, the compact grabbing member 93 and the graphite gasket grabbing member 94 each include a support frame 931 and a lateral sliding rail 932 disposed above the support frame 931, the lateral sliding rail 932 of the compact grabbing member 93 and the lateral sliding rail 932 of the graphite gasket grabbing member 94 are of an integrated sliding rail structure, a first sliding block 933 for grabbing the compact 7 and a second sliding block 9310 for grabbing the graphite gasket 10 are embedded in the lateral sliding rail 932, a first cylinder 934 capable of pushing the first sliding block 933 to reciprocate on the lateral sliding rail 932 is disposed at one side end of the lateral sliding rail 932, a second cylinder 9311 capable of pushing the second sliding block 9310 to reciprocate on the lateral sliding rail 932 is disposed at the other side end of the lateral sliding rail 932, a third cylinder 935 is disposed below the sliding block 933, as shown in fig. 3, a suction cup 936 is disposed at a lower end of the third cylinder 935, a plurality of through holes 937 are disposed on the suction cup 936, a plurality of suction pipes 938 are embedded in each through hole 938, the suction pipes 939 are commonly connected with a vacuum pump 939, and the vacuum pump 939 performs or deflates through the suction pipes 938, so that the suction cups can load or discharge of the compact 937 or the graphite gasket 10.
Further, the lower end of the support rod 92 extends into the sliding seat 91, a driving motor 98 for driving the support rod 92 to rotate circumferentially is arranged in the sliding seat 91, and a bearing 99 is sleeved on the outer circumference of the support rod 92, which is in contact with the sliding seat 91.
Further, racks 910 are respectively arranged on two side end surfaces of the track 8, the extending direction of the racks 910 is consistent with that of the track 8, rollers 911 running on the track 8 are arranged at the lower end of the sliding seat 91, speed regulating motors 912 are respectively connected with two side ends of the sliding seat 91, gears 913 are fixedly sleeved on driving shafts of the speed regulating motors 912, the gears 913 are meshed with the corresponding racks 910, and the speed regulating motors 912 rotate to drive the gears 913 to be meshed with the racks 910 for transmission so as to drive the rollers 911 to run on the track 8.
Further, any support 931 is provided with a control unit electrically connected to the third cylinder 935, the first cylinder 934, the vacuum pump 939, the lifting rotary cylinder 952, the electric push rod 953, the speed regulating motor 912 and the driving motor 98 in sequence, and the first preheating chamber 1, the second preheating chamber 2, the first heat preservation chamber 3, the sintering chamber 4 and the second heat preservation chamber 5 are respectively provided with a heating element and a temperature sensor, and the heating element and the temperature sensor are electrically connected to the uniform control unit.
A rapid sintering method for producing a diamond cutting sheet according to claim 8, comprising the steps of:
S1, stacking pressed blanks after being pressed sequentially from top to bottom by a pressing machine, and stacking a plurality of graphite gaskets sequentially from top to bottom;
S2, the control unit sends out an opening signal instruction to a speed regulating motor on a sliding seat at the front side, so that a gear rotates and walks on a corresponding rack until the sliding seat at the front side is arranged at the middle position of two buffer protection support assemblies, the control unit sends out a stopping signal instruction to the speed regulating motor on the sliding seat, at the moment, the control unit sends out a jacking signal instruction to an electric push rod of the buffer protection support assemblies, and sends out a rotating signal instruction to a lifting rotating cylinder, and the rotating signal instruction is sent to a corresponding support rod, so that support elastic sheets of the two buffer support assemblies are close to two sides of the support rod;
S3, the control unit sends a jacking signal instruction to the second cylinder of the graphite gasket grabbing piece and the second cylinder of the pressed compact grabbing piece, so that the sucker of the graphite gasket grabbing piece is arranged right above the graphite gasket, and the sucker of the pressed compact grabbing piece is arranged right above the pressed compact;
S4, the control unit firstly sends a downward jacking signal instruction to a third cylinder of the graphite gasket grabbing piece, and simultaneously sends an air suction signal instruction to a vacuum pump of the graphite gasket grabbing piece, so that a sucking disc of the graphite gasket grabbing piece sucks the graphite gasket at the upper side, the control unit then sends an upward telescopic signal instruction to the third cylinder of the graphite gasket grabbing piece, and then sends a jacking signal instruction to a second cylinder of the graphite gasket grabbing piece, so that the sucking disc sucked with the graphite gasket is arranged right above a supporting rod, at the moment, the control unit sends an air discharge signal instruction to a vacuum pump of the graphite gasket grabbing piece, the graphite gasket falls and is sleeved on the supporting rod, and is protected by buffering of two buffering protection supporting components, at the moment, the control unit sends a resetting signal instruction to the second cylinder and the third cylinder of the graphite gasket grabbing piece, and at the same time, the control unit sends a shrinking signal instruction to an electric push rod of the buffering protection supporting component, and moves downwards, and after the electric push rod shrinks by a certain stroke distance, the control unit sends a resetting signal instruction to a lifting rotary cylinder of the two buffering protection supporting components, so that the supporting spring sheet and the graphite gasket fall off along with gravity and are separated to the graphite gasket and fall to a buffering spring sheet;
S5, the control unit sends a downward jacking signal instruction to a third cylinder of the compacting grabbing piece, and simultaneously sends an air suction signal instruction to a vacuum pump of the compacting grabbing piece, so that a sucker of the compacting grabbing piece sucks the upper compacting piece, the control unit then sends an upward telescopic signal instruction to the third cylinder of the compacting grabbing piece, and then sends a jacking signal instruction to a first cylinder of the compacting grabbing piece, so that the sucker sucked with the compacting piece is arranged right above a supporting rod, at the moment, the control unit sends an air discharge signal instruction to the vacuum pump of the compacting grabbing piece, the compacting piece falls and is sleeved on the supporting rod and is protected by buffering of two buffering protection supporting components, at the moment, the control unit sends a reset signal instruction to the first cylinder and the third cylinder of the compacting grabbing piece, and simultaneously, the control unit sends a signal instruction to an electric push rod of the buffering protection supporting component, the two buffering protection supporting components support the compacting piece and moves downwards, and after the electric push rod contracts a certain stroke distance, the control unit sends a reset signal instruction to the lifting and rotating of the two buffering protection supporting components, so that the two buffering protection supporting components are separated from the first buffering supporting piece and the compacting piece and the compact by the self-buffering elastic piece, and the buffering elastic piece falls down along with the falling spring;
S6, sequentially repeating the steps S4 and S5 to enable a plurality of pressed blanks and a plurality of graphite gaskets to be distributed at intervals up and down, when the number of the pressed blanks on the support rod at the front side reaches 10-15, the control unit sends an opening signal instruction to the speed regulating motor on the sliding seat at the front side and sends an opening signal instruction to the driving motor on the sliding seat at the front side, so that the support rod on the sliding seat at the front side slides forwards and simultaneously realizes autorotation, and the control unit sends signals to the pressed blank grabbing piece, the graphite gasket grabbing piece and the buffer protection support assembly to reset each;
S7, the control unit sends a signal instruction for starting to the speed regulating motor of the sliding seat at the rear side, and the steps S2 to S6 are repeated to realize automatic feeding of a plurality of sliding seats;
S8, pressing blanks on the sliding seats in the first preheating chamber realize constant-temperature pressing and preheating, in the second preheating chamber realize rapid heating and preheating, and finally slide into the second heat-preserving chamber to be cooled and heat-preserved after heat preservation in the first heat-preserving chamber to be sintered in the sintering chamber.
It should be noted that, during the process of moving down the cushioning and protecting support assembly 95 carrying the compact 7 or the graphite gasket 10, the thickness of the bottom of the support rod 92 gradually increases, so that each stroke gradually decreases, and the decreasing thickness is determined according to the thickness of the compact 7 and the graphite gasket 10.
It will be appreciated by persons skilled in the art that the invention is not limited to the embodiments described above, but is shown and described merely to illustrate the principles of the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a quick sintering device of diamond cutting piece production usefulness which characterized in that: the automatic feeding mechanism is used for vertically and sequentially feeding a plurality of graphite gaskets and a plurality of cut sheet pressed blanks after being pressed by the pressing machine at intervals, and the bottoms of the first preheating chamber, the second preheating chamber, the first heat preservation chamber, the sintering chamber and the second heat preservation chamber are provided with communicated tracks, and the automatic feeding mechanism sequentially passes through the second preheating chamber, the first heat preservation chamber and the sintering chamber to the second heat preservation chamber along the tracks; the temperature of the first preheating chamber is 80-100 ℃, the temperature of the second preheating chamber is 400-500 ℃, the temperature of the first heat preservation chamber is 500-520 ℃, the temperature of the sintering chamber is 800-850 ℃, and the temperature of the second heat preservation chamber is 500-520 ℃;
The automatic feeding mechanism comprises a plurality of sliding seats which are arranged on the track and slide along the track, a supporting rod which is longitudinally arranged above the sliding seats, a pressed compact grabbing piece which is arranged on one side of the supporting rod, and a graphite gasket grabbing piece which is arranged on the other side of the supporting rod, wherein both sides of the supporting rod are respectively provided with a buffering protection supporting component for buffering the pressed compact and the graphite gasket;
The outer circumference of the lower side of the supporting rod is sleeved with a thin disc, a first buffer spring is arranged between the thin disc and the base of the sliding seat, the first buffer spring is sleeved on the outer circumference of the supporting rod, and the pressed compact vertically falls onto the buffer protection supporting assembly along with the pressed compact grabbing piece and the graphite gasket along with the graphite gasket grabbing piece to obtain first buffer, and is driven by the buffer protection supporting assembly to descend onto the thin disc to obtain second buffer;
The buffer protection support assembly comprises a telescopic column and a lifting rotary cylinder arranged at the upper end of the telescopic column, an electric push rod for driving the telescopic column to stretch up and down is arranged in the telescopic column, a second buffer spring is arranged above the driving end of the lifting rotary cylinder, and the upper end of the second buffer spring is connected with a support elastic sheet.
2. The rapid sintering device for producing diamond cutting chips as defined in claim 1, wherein: the support shell fragment includes first horizontal part, second horizontal part and arranges the circular arc portion between first horizontal part and the second horizontal part, the opening of circular arc portion sets up, the upper end and the bottom of circular arc portion of second buffer spring are connected.
3. The rapid sintering device for producing diamond cutting chips as defined in claim 2, wherein: the device comprises a pressing blank grabbing piece and a graphite gasket grabbing piece, wherein the pressing blank grabbing piece and the graphite gasket grabbing piece both comprise a supporting frame and a transverse sliding rail arranged above the supporting frame, the transverse sliding rail of the pressing blank grabbing piece and the transverse sliding rail of the graphite gasket grabbing piece are of an integrated sliding rail structure, a first sliding block for grabbing a pressing blank and a second sliding block for grabbing a graphite gasket are embedded in the transverse sliding rail, a first cylinder capable of pushing the first sliding block to reciprocate on the transverse sliding rail is arranged at one side end of the transverse sliding rail, a second cylinder capable of pushing the second sliding block to reciprocate on the transverse sliding rail is arranged at the other side end of the transverse sliding rail, a third cylinder is arranged below the sliding block, a sucker is arranged at the lower end of the third cylinder, a plurality of through holes are formed in the sucker, an air suction pipe is embedded in each through hole, and a vacuum pump is connected with the air suction pipe jointly, and the vacuum pump is used for sucking or deflating the air through the air suction pipe and the through holes, so that the sucker can realize feeding or discharging of the pressing blank or the graphite gasket.
4. A rapid sintering device for producing diamond segments according to claim 3, wherein: the lower extreme of bracing piece extends to in the sliding seat, have the rotatory driving motor of drive bracing piece circumference in the sliding seat, the bearing is equipped with to the cover on the outer circumference that bracing piece and sliding seat contacted.
5. The rapid sintering device for producing diamond segments according to claim 4, wherein: the utility model discloses a track, including orbital both sides terminal surface, the lower extreme of sliding seat has the gyro wheel that walks on the track, the both sides end of sliding seat all is connected with speed governing motor, fixed cover is equipped with the gear in the drive shaft of speed governing motor, the gear meshes with corresponding rack, thereby speed governing motor rotates and drives gear and rack meshing transmission and drive the gyro wheel and walk on the track.
6. The rapid sintering device for producing diamond segments according to claim 5, wherein: any one of the supporting frames is provided with a control unit which is electrically connected with the third cylinder, the first cylinder, the vacuum pump, the lifting rotary cylinder, the electric push rod, the speed regulating motor and the driving motor in sequence, the first preheating chamber, the second preheating chamber, the first heat preservation chamber, the sintering chamber and the second heat preservation chamber are respectively provided with a heating element and a temperature sensor, and the heating elements and the temperature sensors are electrically connected with the uniform control unit.
7. A rapid sintering method using the rapid sintering device for producing a diamond cutting sheet according to claim 6, characterized in that: the method comprises the following specific steps:
S1, stacking pressed blanks after being pressed sequentially from top to bottom by a pressing machine, and stacking a plurality of graphite gaskets sequentially from top to bottom;
S2, the control unit sends out an opening signal instruction to a speed regulating motor on a sliding seat at the front side, so that a gear rotates and walks on a corresponding rack until the sliding seat at the front side is arranged at the middle position of two buffer protection support assemblies, the control unit sends out a stopping signal instruction to the speed regulating motor on the sliding seat, at the moment, the control unit sends out a jacking signal instruction to an electric push rod of the buffer protection support assemblies, and sends out a rotating signal instruction to a lifting rotating cylinder, and the rotating signal instruction is sent to a corresponding support rod, so that support elastic sheets of the two buffer support assemblies are close to two sides of the support rod;
S3, the control unit sends a jacking signal instruction to the second cylinder of the graphite gasket grabbing piece and the second cylinder of the pressed compact grabbing piece, so that the sucker of the graphite gasket grabbing piece is arranged right above the graphite gasket, and the sucker of the pressed compact grabbing piece is arranged right above the pressed compact;
S4, the control unit firstly sends a downward jacking signal instruction to a third cylinder of the graphite gasket grabbing piece, and simultaneously sends an air suction signal instruction to a vacuum pump of the graphite gasket grabbing piece, so that a sucking disc of the graphite gasket grabbing piece sucks the graphite gasket at the upper side, the control unit then sends an upward telescopic signal instruction to the third cylinder of the graphite gasket grabbing piece, and then sends a jacking signal instruction to a second cylinder of the graphite gasket grabbing piece, so that the sucking disc sucked with the graphite gasket is arranged right above a supporting rod, at the moment, the control unit sends an air discharge signal instruction to a vacuum pump of the graphite gasket grabbing piece, the graphite gasket falls and is sleeved on the supporting rod, and is protected by buffering of two buffering protection supporting components, at the moment, the control unit sends a resetting signal instruction to the second cylinder and the third cylinder of the graphite gasket grabbing piece, and at the same time, the control unit sends a shrinking signal instruction to an electric push rod of the buffering protection supporting component, and moves downwards, and after the electric push rod shrinks by a certain stroke distance, the control unit sends a resetting signal instruction to a lifting rotary cylinder of the two buffering protection supporting components, so that the supporting spring sheet and the graphite gasket fall off along with gravity and are separated to the graphite gasket and fall to a buffering spring sheet;
S5, the control unit sends a downward jacking signal instruction to a third cylinder of the compacting grabbing piece, and simultaneously sends an air suction signal instruction to a vacuum pump of the compacting grabbing piece, so that a sucker of the compacting grabbing piece sucks the upper compacting piece, the control unit then sends an upward telescopic signal instruction to the third cylinder of the compacting grabbing piece, and then sends a jacking signal instruction to a first cylinder of the compacting grabbing piece, so that the sucker sucked with the compacting piece is arranged right above a supporting rod, at the moment, the control unit sends an air discharge signal instruction to the vacuum pump of the compacting grabbing piece, the compacting piece falls and is sleeved on the supporting rod and is protected by buffering of two buffering protection supporting components, at the moment, the control unit sends a reset signal instruction to the first cylinder and the third cylinder of the compacting grabbing piece, and simultaneously, the control unit sends a signal instruction to an electric push rod of the buffering protection supporting component, the two buffering protection supporting components support the compacting piece and moves downwards, and after the electric push rod contracts a certain stroke distance, the control unit sends a reset signal instruction to the lifting and rotating of the two buffering protection supporting components, so that the two buffering protection supporting components are separated from the first buffering supporting piece and the compacting piece and the compact by the self-buffering elastic piece, and the buffering elastic piece falls down along with the falling spring;
S6, sequentially repeating the steps S4 and S5 to enable a plurality of pressed blanks and a plurality of graphite gaskets to be distributed at intervals up and down, when the number of the pressed blanks on the support rod at the front side reaches 10-15, the control unit sends an opening signal instruction to the speed regulating motor on the sliding seat at the front side and sends an opening signal instruction to the driving motor on the sliding seat at the front side, so that the support rod on the sliding seat at the front side slides forwards and simultaneously realizes autorotation, and the control unit sends signals to the pressed blank grabbing piece, the graphite gasket grabbing piece and the buffer protection support assembly to reset each;
S7, the control unit sends a signal instruction for starting to the speed regulating motor of the sliding seat at the rear side, and the steps S2 to S6 are repeated to realize automatic feeding of a plurality of sliding seats;
S8, pressing blanks on the sliding seats in the first preheating chamber realize constant-temperature pressing and preheating, in the second preheating chamber realize rapid heating and preheating, and finally slide into the second heat-preserving chamber to be cooled and heat-preserved after heat preservation in the first heat-preserving chamber to be sintered in the sintering chamber.
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