CN216688250U - Continuous heat treatment automatic production line for small and micro steel balls - Google Patents

Abstract

The utility model relates to a continuous heat treatment automatic production line of small and micro steel balls, which comprises the following steps: a feeding device; a heat treatment device; and cleaning the drying device. On one hand, the utility model effectively prevents oil mist generated during quenching from entering the heating furnace, reduces carbon deposition in the furnace, improves the surface brightness of the steel balls, and forms surging stirring on the steel balls through surging oil liquid at the discharge port of the material guide channel, thereby effectively improving the cooling strength and uniformity and ensuring the quenching effect; on the other hand, the problem that small and micro steel balls are easy to stick and block in the moving process is solved, the spiral piece in the roller is designed, the small and micro steel balls can be driven to continuously roll and automatically discharge in the roller, meanwhile, soap water and clean water can comprehensively clean and dry the surfaces of the small and micro steel balls according to a set program, the integrated and continuous production of cleaning, rinsing and drying is realized, the cleaning and drying of the steel balls are realized, the integrated and continuous production of cleaning, rinsing and drying is realized, and the cleaning and drying of the steel balls are ensured.

Description

Continuous heat treatment automatic production line for small and micro steel balls

Technical Field

The utility model belongs to the field of steel ball production equipment, and particularly relates to a continuous heat treatment automatic production line for small and micro steel balls.

Background

With the improvement of the bearing steel ball blank manufacturing process and the research and development and update of equipment, the process flow at the present stage is as follows: raw material (bar stock) -cold heading-photosphere-heat treatment-hard grinding-primary grinding-lapping-super lapping-optical appearance-cleaning and rust-proofing-finished product inspection-packaging. Wherein, the cold heading is to process the rod-shaped material into a blank by a steel ball blank cold heading machine; the photosphere stage is used for unifying the dimensional tolerance after the cold heading stage, grinding the ring belt and the two poles of the ball blank, and the stage is basically spherical; the heat treatment process is used for changing the internal organization structure of the ball blank, improving the strength of the steel ball blank and prolonging the service life of the steel ball blank; the hard grinding process is mainly used for improving the dimensional accuracy of the steel ball blank; the grinding process improves the surface precision, and then the processing is finished after the separation by the surface detection device.

Meanwhile, for bearing steel balls (i.e. small micro steel balls) with the diameter of less than 3mm, the heat treatment device adopted in the heat treatment process comprises a heating furnace and a quenching oil tank which are arranged up and down, a blanking channel is usually arranged at the discharge end of the heating furnace to send the small micro steel balls into the quenching oil tank, and the small micro steel balls need to be cleaned and dried after quenching to enter a tempering furnace for tempering treatment.

However, in the actual production process, the following drawbacks are liable to occur:

1. when the high-temperature bearing steel ball falls and is quenched, a large amount of oil mist is easily generated and enters a heat treatment furnace, so that a large amount of carbon deposition is generated in the heat treatment furnace, and the surface of the steel ball is dark; meanwhile, the small micro steel balls can generate an aggregation effect at the outlet of the blanking channel before entering the quenching tank, so that quenching defects are easily caused;

2. in the cleaning process, the small steel balls are light in weight, so that the ball sticking phenomenon is easily generated in the cleaning process, the surfaces of the steel balls cannot be completely cleaned, and the cleaning effect is poor.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide an improved automatic production line for continuous heat treatment of small and micro steel balls.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a continuous heat treatment automatic production line of small and micro steel balls comprises:

the feeding device is used for supplying small micro steel balls;

the heat treatment device comprises a roller type heating furnace, a blanking channel, a quenching oil groove and a tempering furnace which are arranged in sequence;

the cleaning and drying device is used for cleaning and drying the small micro steel balls, two groups of cleaning and drying devices are arranged and are respectively matched with the heating furnace and the tempering furnace,

the cleaning and drying device comprises a roller, a cleaning unit and a drying unit, wherein the roller comprises a barrel body with a feeding end part and a discharging end part and a spiral conveying piece, the barrel body comprises a spiral body formed by continuously and spirally winding a steel wire and a supporting frame for supporting the spiral body, the extending direction of the spiral body is consistent with the length direction of the barrel body, a gap formed between every two adjacent circles of steel wires is smaller than the diameter of a small micro steel ball, and the supporting frame extends along the length direction of the barrel body and is fixed on the periphery of the spiral body around the circumference of the barrel body; the spiral conveying piece is formed on the inner wall of the spiral body, and the small micro steel balls entering the cylinder body are guided by the spiral conveying piece to stay in the cylinder body or be discharged from the end part of the discharging body; the cleaning unit comprises a soap water supply component for spraying soap water into the spiral body, a clear water supply component for spraying clear water into the spiral body, and a circulating component for respectively recovering the soap water and the clear water falling from the gap and circularly spraying the soap water and the clear water; the drying unit comprises an air heater and an air channel for communicating the air heater with the spiral body;

the blanking channel comprises a sealing channel connected with the heating furnace and a material guide channel connected between the sealing channel and the quenching tank, wherein oil path interfaces are formed on two sides of the sealing channel, oil sprayed out from the oil path interface on each side forms an arc-shaped oil curtain, and the two arc-shaped oil curtains are intersected from the lower part to form a blocking oil curtain; the material guide channel comprises a channel body and an oil cavity, wherein the upper part and the lower part of the channel body are respectively provided with a feeding hole and a discharging hole, the oil cavity is provided with a first oil injection port and a second oil injection port, the first oil injection port is communicated with the feeding hole, and oil sprayed out of the first oil injection port forms an oil curtain positioned below the blocking oil curtain; the second oil injection port is communicated with the discharge port, and the oil sprayed out of the second oil injection port is in a gushing shape.

Preferably, the channel body comprises a first cavity and a second cavity which are arranged in a vertically through mode, wherein the feeding hole is located in the first cavity, and the discharging hole is located in the second cavity. The device is simple in structure, convenient to process and low in cost.

Specifically, the first cavity is opened from the top and forms a feed inlet, wherein the feed inlet is square, the lower end of the sealed channel extends into the feed inlet, and the first cavity is gradually narrowed from top to bottom; a plurality of air vents are formed in two opposite side walls of the first cavity respectively, and oil mist generated when the steel ball passes through the oil curtain is discharged from the air vents. The steel ball collecting device is convenient to collect materials, ensures that steel balls can fall in a concentrated mode, and avoids bouncing and impacting.

Preferably, the first oil injection port is arranged on the side wall of the first cavity and injects the oil curtain along the horizontal direction, and the oil curtain injected by the first oil injection port is positioned among the plurality of air vents. By the arrangement, oil smoke generated at the oil level when the high-temperature workpiece in the furnace falls into quenching oil can be discharged out of the sealing cover area of the sealing channel, the oil smoke is prevented from entering the sealing channel, and the surface brightness of the steel ball is improved.

Preferably, the second cavity extends downwards from the bottom end of the first cavity in an arc shape and is gradually narrowed, the second cavity is opened from the bottom end and forms a circular tube-shaped discharge hole, and the central line of the discharge hole is horizontally arranged; the second nozzle opening sets up in the discharge gate department, and wherein the second nozzle opening has a plurality ofly, and distributes around the central line of discharge gate, and a plurality of second nozzle openings form annular fluid injection district in discharge gate department. Set up like this, when the steel ball passes through the discharge gate, density increases, and the annular fluid that the second nozzle jetted can form the gushing stirring to the steel ball, can effectively improve cooling strength and homogeneity, guarantees the quenching effect.

Preferably, the widths of two adjacent slits are set to be equal. The cylinder body formed by winding one steel wire has smooth inner wall and uniformly distributed high-precision gaps, and cannot generate connection defects due to joints, so that compared with the traditional mode of adopting a hole opening mode on the cylinder body, the hole opening process is more difficult due to the limitation of the hole diameter; meanwhile, the continuous gap has better circulation effect than the traditional hole opening mode, can ensure that the steel ball is not stuck in the conveying process in the cylinder body, and is favorable for smoothly discharging liquid medium (if any) in the cylinder body so as to form circulation.

Preferably, the stack shell still includes first section of thick bamboo head and the second section of thick bamboo head of sealing connection at the spirochaeta both ends respectively, and wherein first section of thick bamboo head and second section of thick bamboo head correspond and form feeding tip and ejection of compact tip, and first section of thick bamboo head and second section of thick bamboo head outwards extend along stack shell length direction from the corresponding tip of spirochaeta respectively to be coniform. The device is mainly used for the intermittent beat conveying of small and micro steel balls in various process links, such as beat cleaning processes and the like, and can effectively prevent the steel balls from rolling out and the outflow of liquid media such as cleaning liquid and the like in the process of process beats needing to stay in the cylinder.

Preferably, the spiral conveying piece comprises a first spiral piece arranged in the spiral body and a second spiral piece arranged in the second cylinder head, wherein the first spiral piece and the second spiral piece are arranged in a connection mode, and when the roller rotates, the small micro steel balls enter the spiral body from the first cylinder head and roll back and forth along the first spiral piece or enter the second spiral piece along the first spiral piece and are discharged out of the second cylinder head. That is, in the normal rotation process of the roller, the steel balls rolling in the roller are automatically guided into the roller, so that the steel balls continuously roll in the roller and cannot roll out in the roller in the process of staying in the roller at the beat; when the process beat is completed and the material needs to be discharged, the roller rotates reversely, so that the steel balls in the roller can be guided into the second spiral sheet by the first spiral sheet to be completely sent out of the roller.

Specifically, the first spiral sheet is fixedly connected to the inner wall of the spiral body, wherein the length direction of the first spiral sheet is intersected with the central line of the cylinder body; the second spiral piece comprises a first sub plate and a second sub plate which are respectively and fixedly connected to the inner wall of the second cylinder head, wherein the first sub plate and the second sub plate are arranged in a radial direction of the second cylinder head in a staggered mode, and the first spiral piece is fixedly connected with the first sub plate or the second sub plate from one end portion.

Preferably, the soap water supply part comprises a soap water tank arranged at one side of the roller, a soap water supply pipeline for communicating the soap water tank with the spiral inner cavity, and a soap water pump arranged on the soap water supply pipeline; the clear water supply part comprises a clear water tank arranged on the other side opposite to the roller, a clear water supply pipeline communicated with the clear water tank and the inner cavity of the spiral body, and a clear water pump arranged on the clear water supply pipeline; the cleaning unit also comprises a spray pipeline extending into the spiral body from the feeding end part, wherein the soap water supply pipeline and the clear water supply pipeline are respectively connected to the spray pipeline.

Preferably, the circulating part comprises a receiving box arranged below the roller, a soap water circulating pipeline connecting the receiving box and the soap water tank, and a clear water circulating pipeline connecting the receiving box and the clear water tank.

In addition, the air heater sets up in feeding end portion one side, and the wind channel stretches into the spirochaeta setting from the feeding end portion.

Due to the implementation of the technical scheme, compared with the prior art, the utility model has the following advantages:

on one hand, the utility model effectively prevents oil mist generated during quenching from entering the heating furnace, reduces carbon deposition in the furnace, improves the surface brightness of the steel balls, and forms surging stirring on the steel balls through surging oil liquid at the discharge port of the material guide channel, thereby effectively improving the cooling strength and uniformity and ensuring the quenching effect; on the other hand, the problem that small and micro steel balls are easy to stick and block in the moving process is solved, the spiral piece in the roller is designed, the small and micro steel balls can be driven to continuously roll and automatically discharge in the roller, meanwhile, soap water and clean water can be comprehensively cleaned and dried on the surfaces of the small and micro steel balls according to a set program, the integrated and continuous production of cleaning, rinsing and drying is realized, and the cleaning and drying of the steel balls are ensured.

Drawings

The utility model is described in further detail below with reference to the following figures and specific examples:

FIG. 1 is a schematic structural view of an automatic continuous heat treatment production line for small micro-steel balls according to the present invention;

FIG. 2 is an enlarged schematic front view of the cleaning and drying apparatus of FIG. 1;

FIG. 3 is a schematic left side view of FIG. 2 (without the drying unit);

FIG. 4 is a schematic top view of FIG. 2 (without the drying unit);

FIG. 5 is an enlarged view of the drum of FIG. 2;

FIG. 6 is a schematic partial cross-sectional view of FIG. 5;

FIG. 7 is a schematic half-section view of the barrel of FIG. 5;

FIG. 8 is a left side elevational schematic view of the barrel of FIG. 5;

FIG. 9 is a schematic sectional view taken along line A-A in FIG. 4;

FIG. 10 is an enlarged view of the structure of the blanking passage shown in FIG. 1;

FIG. 11 is a schematic view showing the structure of the material guiding passage in FIG. 10;

wherein: 1. a feeding device;

2. a heat treatment device; 20. heating furnace; 21. an oil quenching tank; 22. tempering furnace;

3. cleaning and drying the device; 30. a drum; 300. a barrel body; a0, a spiral body; f. a gap; a1, a first cylinder head; a2, a second cylinder head; a3, a support frame; a30, rigid ribs; 301. a spiral conveying sheet; b1, a first spiral sheet; b2, a second spiral sheet; b21, a first sub-board; b22, a second board section; 31. a cleaning unit; 310. a soap water supply part; c0, a soap water tank; c1, soap water supply pipe; c2, soap water pump; 311. a clear water supply part; d0, a clear water tank; d1, clean water supply pipeline; d2, a clean water pump; 312. a circulating member; e0, holding box; e1, a soap water circulation pipeline; e2, a clean water circulating pipeline; 313. a spray pipe; 32. a drying unit; 320. a hot air blower; 321. an air duct;

4. a blanking channel; 40. sealing the channel; g. an oil line interface; 41. a material guide channel; 410. a channel body; h1, a first cavity; k1, feed inlet; k3, vent; h2, a second cavity; k2, a discharge hole; 411. an oil chamber; p1, a first oil jet; p2, a second oil jet;

5. a feeding device; 50. a material box; 51. a lifting member;

6. and a conveyor.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1, the automatic production line for continuous heat treatment of small micro-steel balls according to the present embodiment includes a feeding device 1, a heat treatment device 2, a cleaning and drying device 3, and a blanking channel 4.

Specifically, the feeding device 1 is used for supplying small micro-steel balls in batches for subsequent processing.

The heat treatment device 2 comprises a roller type heating furnace 20, a quenching oil tank 21 and a tempering furnace 22 which are sequentially arranged from left to right, wherein the quenching oil tank 21 is positioned below the discharge end of the heating furnace 20.

In this example, there are two sets of cleaning and drying devices 3, and the two sets of cleaning and drying devices 3 are respectively disposed on the left side of the heating furnace 20 and the left side of the tempering furnace 22, and the small micro-steel balls are respectively cleaned and dried by the corresponding cleaning and drying devices 3 before entering the heating furnace 20 and the tempering furnace 22.

For convenience, a feeding device 5 is arranged between the heating furnace 20 and the corresponding cleaning and drying device 3, wherein the feeding device 5 comprises a bin 50 for receiving the small steel balls discharged from the cleaning and drying device 3, and a lifting member 51 engaged with the bin 50, and the lifting member 51 is used for lifting the small steel balls in the bin 50 upwards and dumping the small steel balls to a feeding port of the heating furnace 20.

Meanwhile, the embodiment further comprises a conveyor 6 which is obliquely arranged from the oil quenching tank 21 to the right, and the small and micro steel balls are input into the cleaning and drying device 3 matched with the tempering furnace 22 through the conveyor 6 for cleaning and drying after being quenched in the oil quenching tank 21.

As shown in fig. 2 to 4, each set of the washing and drying devices 3 includes a drum 30, a washing unit 31, and a drying unit 32.

As shown in fig. 5 and 6, the drum 30 includes a drum 300 and a spiral conveying sheet 301, wherein the drum 300 rotates by an endless transmission chain.

The barrel 300 comprises a spiral body a0, a first barrel head a1, a second barrel head a2 and a supporting frame a 3.

Referring to fig. 7 and 8, the spiral body a0 is formed by continuously spirally winding a steel wire, and the extending direction of the spiral body is the same as the length direction of the barrel body 300, wherein the gap f formed between every two adjacent circles of steel wires is smaller than the diameter of the small steel microsphere.

Meanwhile, the width of each slit f is equally set. The cylinder body formed by winding one steel wire has smooth inner wall and uniformly distributed high-precision gaps, and cannot generate connection defects due to joints, so that compared with the traditional mode of adopting a hole opening mode on the cylinder body, the hole opening process is more difficult due to the limitation of the hole diameter; meanwhile, the continuous gap has better circulation effect than the traditional hole opening mode, can ensure that the steel ball is not stuck in the conveying process in the cylinder body, and is favorable for smoothly discharging liquid medium (if any) in the cylinder body so as to form circulation.

Specifically, the first tube head a1 and the second tube head a2 are respectively connected to two ends of the spiral body a0 in a sealing manner by welding, wherein the first tube head a1 and the second tube head a2 are correspondingly formed with a feeding end and a discharging end, and the first tube head a1 and the second tube head a2 are respectively in a conical shape extending outwards from the corresponding end of the spiral body a0 along the length direction of the cylinder body 300. The device is mainly used for the intermittent beat conveying of small and micro steel balls in various process links, such as beat cleaning processes and the like, and can effectively prevent the steel balls from rolling out and the outflow of liquid media such as cleaning liquid and the like in the process of process beats needing to stay in the cylinder.

Specifically, the supporting frame a3 includes a plurality of rigid ribs a30 distributed in an array around the circumference of the screw a0, wherein each rigid rib a30 extends along the length direction of the barrel 300 and is welded and fixed with the outer wall of the screw a 0. The arrangement ensures the smoothness of the inner wall of the spiral body and ensures that the cylinder body has enough rigidity.

In this example, the spiral conveying blade 301 includes a first spiral blade b1 disposed in the spiral body a0 and a second spiral blade b2 disposed in the second barrel head a2, wherein the first spiral blade b1 and the second spiral blade b2 are disposed in engagement, and when the roller rotates, the small micro steel balls enter the spiral body a0 from the first barrel head a1 and roll back and forth along the first spiral blade b1, or enter the second spiral blade b2 along the first spiral blade b1 and exit the second barrel head a 2. That is, in the normal rotation process of the roller, the steel balls rolling in the roller are automatically guided into the roller, so that the steel balls continuously roll in the roller and cannot roll out in the roller in the process of staying in the roller at the beat; when the process beat is completed and the material needs to be discharged, the roller rotates reversely, so that the steel balls in the roller can be guided into the second spiral sheet by the first spiral sheet to be completely sent out of the roller.

Specifically, the first spiral piece b1 is welded on the inner wall of the spiral body a0, and the length direction of the first spiral piece b1 is intersected with the center line of the barrel body 300.

Specifically, the second spiral piece b2 includes a first branch plate b21 and a second branch plate b22 fixedly connected to the inner wall of the second barrel head a2, wherein the first branch plate b21 and the second branch plate b22 are arranged in a radially staggered manner at the second barrel head a2, and the first spiral piece b1 is welded and fixed to the first branch plate b21 from one end.

In this example, the washing unit 31 includes a soap water supply part 310 for spraying soap water into the screw a0, a fresh water supply part 311 for spraying fresh water into the screw a0, and a circulation part 312 for recovering the soap water and the fresh water falling from the slit b00, respectively, and circulating the spray.

Specifically, the soap water supply part 310 includes a soap water tank c0 disposed at one side of the drum 30, a soap water supply pipe c1 communicating the soap water tank c0 with the inner cavity of the spiral a0, and a soap water pump c2 disposed on the soap water supply pipe c 1; the clean water supplying part 311 includes a clean water tank d0 disposed at the opposite side of the drum 30, a clean water supplying pipe d1 communicating the clean water tank d0 with the inner cavity of the spiral body a0, and a clean water pump d2 disposed on the clean water supplying pipe d 1. Set up like this, through soap water pump and clarified water pump, can realize the independent supply of soap water and clear water, be convenient for realize different cleaning medium's switching, realize the combined function of washing and rinsing.

Meanwhile, the cleaning unit 31 further includes a spray pipe 313 horizontally extending from the first barrel head a1 into the screw a0 along the length direction of the barrel 300, wherein the soap water supply pipe c1 and the clean water supply pipe d1 are respectively connected to the spray pipe 313. The soap water and clear water spraying device is simple in structure, and is convenient to realize that soap water and clear water are uniformly sprayed inside the spiral body, so that the cleaning effect is guaranteed.

Specifically, the circulation unit 312 includes a receiving tank e0 disposed below the drum 30, a soap water circulation pipe e1 connecting the receiving tank e0 and the soap water tank c0, and a clean water circulation pipe e2 connecting the receiving tank e0 and the clean water tank d0, wherein the soap water circulation pipe e1 and the clean water circulation pipe e2 are independently controlled by a suction pump. The arrangement is convenient for realizing the online discharge and backflow of the cleaning medium in the cylinder, and the circular spray washing effect is formed.

As shown in fig. 9, the bottom of the receiving box e0 is inclined downward from right to left, and the soap water circulation pipe e1 and the clean water circulation pipe e2 are connected to the left side wall of the receiving box e 0. Due to the arrangement, the fallen soap water and the fallen clean water can be accumulated on the left side of the receiving box, so that the soap water circulating pipeline and the clean water circulating pipeline can be conveniently sucked.

In this example, the drying unit 32 includes a hot air blower 320 disposed on one side of the first cylinder head a1, and an air duct 321 for communicating the hot air blower 320 with the screw a0, wherein the air duct 321 is disposed to extend from the feeding end into the screw a 0. After cleaning, the drying of the steel balls is realized by continuously blowing hot air to the spiral body, and the efficiency is high.

The cleaning and drying apparatus 3 further includes a frame for realizing the positional relationship among the above-described components, and an electric device.

Therefore, the implementation process of the cleaning and drying device 3 of the present embodiment includes the following steps: and turning on a soap water pump to perform circulating degreasing and cleaning on the small micro steel balls in the roller, turning on a clean water pump to perform circulating rinsing on the small micro steel balls in the roller, and turning on a hot air blower to blow hot air into the roller so as to dry the small micro steel balls.

As shown in fig. 10 and 11, the blanking passage 4 includes a sealing passage 40 and a material guiding passage 41.

Specifically, the sealing channel 40 extends downward from the discharge end of the heating furnace 20 in the vertical direction, oil line interfaces g are formed on two sides of the sealing channel 40, oil sprayed from the oil line interfaces g on each side forms an arc-shaped oil curtain, and the two arc-shaped oil curtains intersect at the lower part to form a blocking oil curtain. By the arrangement, oil mist generated during quenching can be effectively prevented from entering the heating furnace, and carbon deposition in the furnace is reduced.

The material guide channel 41 comprises a channel body 410 and an oil cavity 411, wherein a feed port k1 and a discharge port k2 are respectively formed at the upper part and the lower part of the channel body 410, the oil cavity 411 is provided with a first oil injection port p1 and a second oil injection port p2, the first oil injection port p1 is communicated with the feed port k1, and oil sprayed out of the first oil injection port p1 forms an oil curtain positioned below the blocking oil curtain; the second oil injection port p2 is communicated with the discharge port k2, and the oil sprayed out of the second oil injection port p2 is in a gushing shape.

Specifically, the channel body 410 includes a first cavity h1 and a second cavity h2 which are vertically arranged in a through manner, wherein the first cavity h1 and the second cavity h2 are integrally formed. The device is simple in structure, convenient to process and low in cost.

The first cavity h1 is open from the top and forms a feed port k1, wherein the feed port k1 is square, the lower end of the sealing channel 40 extends into the feed port k1, and the first cavity h1 is gradually narrowed from top to bottom. The steel ball collecting device is convenient to collect materials, ensures that steel balls can fall in a concentrated mode, and avoids bouncing and impacting.

Meanwhile, a plurality of air vents k3 are formed in the front and rear side walls of the first chamber h1, respectively, wherein oil mist generated when the steel ball passes through the oil curtain is discharged from the air vent k 3. By the arrangement, oil mist generated when the high-temperature steel ball passes through the oil curtain is effectively prevented from entering the heat treatment furnace.

Specifically, the second cavity h2 extends downward from the bottom end of the first cavity h1 in an arc shape, wherein the second cavity h2 is opened from the bottom end and forms a discharge hole k 2. The arrangement can buffer the falling steel balls, reduce the impact force and prolong the service life of the device.

For convenience, the second cavity h2 is gradually narrowed from top to bottom, and the discharge hole k2 of the second cavity h2 is in a circular tube shape. By the arrangement, when the steel balls pass through the discharge port, the density is increased, and oil is convenient to gush and stir.

Meanwhile, the center line of the discharge port k2 is horizontally arranged. The arrangement is convenient for the steel ball to enter the quenching tank from the discharge hole, so that the impact force is reduced.

In this embodiment, the oil chamber 411 is fixedly connected to the channel body 410 and extends along one side of the outer contour of the first cavity h1 and the second cavity h2 from top to bottom. The device is compact in structure and convenient to install and use.

Specifically, the first oil injection port p1 is disposed on the left side wall of the first cavity h1, and an oil curtain formed by horizontally injecting oil to the right in the first oil injection port p1 is located between the plurality of air ports k 3. By the arrangement, oil smoke generated at the oil level when the high-temperature workpiece in the furnace falls into quenching oil can be discharged out of the sealing cover area of the sealing channel, the oil smoke entering the sealing channel is reduced, and the surface brightness of the steel ball is improved.

In addition, second oil spout p2 sets up on second cavity h2, and sets up near discharge gate k 2.

Specifically, second oil jet p2 is provided at discharge gate k2, wherein second oil jet p2 is a plurality of, and distributes around the central line of discharge gate k2, and a plurality of second oil jets p2 form annular oil injection zone at discharge gate k 2. By the arrangement, the density of the steel balls at the discharge port is increased, and the annular oil sprayed by the second oil nozzle can form gushing stirring on the steel balls, so that the cooling strength and uniformity can be effectively improved, and the quenching effect is ensured.

In summary, the advantages of this embodiment are as follows:

1. the problem that small and tiny steel balls are easy to stick and clamp balls in the movement process is solved, and the problem that the small and tiny steel balls require that a cleaning roller body is difficult to process because overflow holes smaller than the ball diameter are formed;

2. the spiral piece design in the roller can drive the small micro steel balls to continuously roll in the roller and automatically discharge;

3. the soap water and the clear water are used for comprehensively cleaning and drying the surfaces of the small and micro steel balls according to a set program;

4. through the independent control of each pump, the automatic switching of different cleaning media and drying programs of double-tank or even multi-tank can be met, the integrated and continuous production of cleaning, rinsing and drying is realized, and the cleanness and the dryness of the steel balls are ensured;

5. by the cooperation of the oil curtain in the sealing channel and the oil curtain in the material guide channel, oil mist generated during quenching is effectively prevented from entering the heating furnace, carbon deposition in the furnace is reduced, and the surface brightness of the steel ball is improved;

6. the steel balls are stirred in a spraying mode through the oil sprayed at the discharge port of the material guide channel, so that the cooling strength and uniformity can be effectively improved, and the quenching effect is guaranteed;

7. the buffer device can play a role in buffering the steel balls falling at high speed, reduce the impact force of the steel balls and prolong the service life of the device;

8. simple structure, reliability and low cost.

The present invention has been described in detail in order to enable those skilled in the art to understand the utility model and to practice it, and it is not intended to limit the scope of the utility model, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the present invention.

Claims (10)

1. A continuous heat treatment automatic production line of small and micro steel balls comprises:

the feeding device is used for supplying small micro steel balls;

the heat treatment device comprises a roller type heating furnace, a blanking channel, a quenching oil groove and a tempering furnace which are arranged in sequence;

the cleaning and drying devices are used for cleaning and drying the small micro steel balls, and the cleaning and drying devices are divided into two groups and are respectively matched with the heating furnace and the tempering furnace;

the method is characterized in that:

the cleaning and drying device comprises a roller, a cleaning unit and a drying unit, wherein the roller comprises a barrel body with a feeding end part and a discharging end part and a spiral conveying piece, the barrel body comprises a spiral body formed by continuously and spirally winding a steel wire and a supporting frame for supporting the spiral body, the extending direction of the spiral body is consistent with the length direction of the barrel body, a gap formed between every two adjacent circles of the steel wire is smaller than the diameter of a small micro steel ball, and the supporting frame extends along the length direction of the barrel body and is fixed on the periphery of the spiral body around the circumference of the barrel body; the spiral conveying piece is formed on the inner wall of the spiral body, and small micro steel balls entering the cylinder body are guided by the spiral conveying piece to stay on the cylinder body or be discharged from the discharging end part; the cleaning unit comprises a soap water supply component for spraying soap water into the spiral body, a clear water supply component for spraying clear water into the spiral body, and a circulating component for respectively recovering the soap water and the clear water falling from the gap and circularly spraying the soap water and the clear water; the drying unit comprises an air heater and an air channel for communicating the air heater with the spiral body;

the blanking channel comprises a sealing channel connected with the heating furnace and a material guide channel connected between the sealing channel and the quenching tank, wherein oil path interfaces are formed on two sides of the sealing channel, oil sprayed from the oil path interface on each side forms an arc-shaped oil curtain, and the two arc-shaped oil curtains are intersected from the lower part to form a blocking oil curtain; the material guide channel comprises a channel body and an oil cavity, wherein the upper part and the lower part of the channel body are respectively provided with a feeding hole and a discharging hole, the oil cavity is provided with a first oil injection port and a second oil injection port, the first oil injection port is communicated with the feeding hole, and oil sprayed out of the first oil injection port forms an oil curtain positioned below the blocking oil curtain; the second oil injection port is communicated with the discharge port, and oil sprayed out of the second oil injection port is in a gushing shape.

2. The automatic production line for continuous heat treatment of small micro-steel balls according to claim 1, characterized in that: the channel body comprises a first cavity and a second cavity which are arranged in a vertically through mode, wherein the feed inlet is located on the first cavity, and the discharge outlet is located on the second cavity.

3. The automatic production line for continuous heat treatment of small micro-steel balls according to claim 2, characterized in that: the first cavity is opened from the top and forms the feed inlet, wherein the feed inlet is square, the lower end of the sealed channel extends into the feed inlet, and the first cavity is gradually narrowed from top to bottom; and a plurality of air vents are formed in two opposite side walls of the first cavity respectively, and oil mist generated when the steel ball passes through the oil curtain is discharged from the air vents.

4. A continuous thermal treatment automatic production line for small micro-steel balls according to claim 3, characterized in that: the first oil spray port is arranged on the side wall of the first cavity and sprays the oil curtain along the horizontal direction, and the oil curtain sprayed by the first oil spray is positioned among the plurality of air vents.

5. The automatic production line for continuous heat treatment of small micro-steel balls according to claim 2, characterized in that: the second cavity extends downwards from the bottom end of the first cavity in an arc shape and is gradually narrowed, the second cavity is opened from the bottom end and forms the circular tube-shaped discharge hole, and the central line of the discharge hole is horizontally arranged; the second oil injection port is arranged at the discharge port, a plurality of second oil injection ports are distributed around the center line of the discharge port, and an annular oil injection area is formed at the discharge port by the plurality of second oil injection ports.

6. The automatic production line for continuous heat treatment of small micro-steel balls according to claim 1, characterized in that: the width of two adjacent gaps is equal.

7. The automatic production line for continuous heat treatment of small micro-steel balls according to claim 1, characterized in that: the cylinder body further comprises a first cylinder head and a second cylinder head which are respectively connected with two ends of the spiral body in a sealing manner, wherein the first cylinder head and the second cylinder head correspondingly form the feeding end part and the discharging end part, and the first cylinder head and the second cylinder head respectively extend outwards from the corresponding end parts of the spiral body along the length direction of the cylinder body and are in a conical shape; the spiral conveying piece comprises a first spiral piece arranged in the spiral body and a second spiral piece arranged in the second barrel head, wherein the first spiral piece and the second spiral piece are connected and arranged, small steel balls enter the first barrel head into the spiral body when the roller rotates, the first spiral piece rolls in a reciprocating mode, or the first spiral piece enters the second spiral piece and is discharged from the second barrel head.

8. A continuous thermal treatment automatic production line for small micro-steel balls according to claim 7, characterized in that: the first spiral sheet is fixedly connected to the inner wall of the spiral body, wherein the length direction of the first spiral sheet is intersected with the central line of the cylinder body; the second spiral piece comprises a first sub plate and a second sub plate which are respectively and fixedly connected to the inner wall of the second cylinder head, wherein the first sub plate and the second sub plate are arranged in a radial direction of the second cylinder head in a staggered mode, and the first spiral piece is fixedly connected with the first sub plate or the second sub plate from one end portion.

9. The automatic production line for continuous heat treatment of small micro-steel balls according to claim 1, characterized in that: the soap water supply component comprises a soap water tank arranged on one side of the roller, a soap water supply pipeline for communicating the soap water tank with the inner cavity of the spiral body, and a soap water pump arranged on the soap water supply pipeline; the clear water supply part comprises a clear water tank arranged on the other side opposite to the roller, a clear water supply pipeline for communicating the clear water tank with the inner cavity of the spiral body, and a clear water pump arranged on the clear water supply pipeline; the cleaning unit also comprises a spray pipeline extending into the spiral body from the feeding end part, wherein the soap water supply pipeline and the clean water supply pipeline are respectively connected to the spray pipeline.

10. The automatic production line for continuous heat treatment of small micro-steel balls according to claim 9, characterized in that: the circulating part comprises a bearing box arranged below the roller, a soap water circulating pipeline connecting the bearing box and the soap water tank, and a clear water circulating pipeline connecting the bearing box and the clear water tank;

the air heater is arranged on one side of the feeding end part, and the air channel extends into the spiral body from the feeding end part.

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