CN114990313A

CN114990313A - Spring continuous tempering furnace and tempering process thereof

Info

Publication number: CN114990313A
Application number: CN202210576064.0A
Authority: CN
Inventors: 何利亚; 颜永法
Original assignee: Hangzhou Baojia Spring Co ltd
Current assignee: Hangzhou Baojia Spring Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-09-02

Abstract

The utility model belongs to the technical field of the tempering technique and specifically relates to a spring continuous type tempering furnace and tempering technology thereof is related to, it includes the furnace body of a plurality of adjacent settings, be provided with the chamber that holds of holding the work piece in the furnace body, the furnace body hold the chamber lateral wall include the inside wall and with the lateral wall of inside wall parcel, be provided with heating resistor on the inside wall, the lateral wall is the cavity setting and forms the hot oil pocket that is equipped with the heating oil, each the furnace body the hot oil pocket all communicates with each other and sets up, and each be provided with the insulating layer between the furnace body, the lateral wall is provided with outward and is used for controlling the heating oil to remove to each the furnace body oil circuit regulation structure in the hot oil pocket. This application has the effect that improves the utilization ratio of internal energy when tempering to the tempering furnace.

Description

Spring continuous tempering furnace and tempering process thereof

Technical Field

The application relates to the technical field of tempering, in particular to a spring continuous tempering furnace and a tempering process thereof.

Background

Tempering is a heat treatment process that after hardening and cooling, a workpiece is heated to a certain temperature below Ac1, heat is preserved for a certain time, and then the workpiece is cooled to room temperature under a cooling medium, and the purpose is mainly as follows: eliminating residual stress generated during workpiece quenching, and preventing deformation and cracking; the hardness, strength, plasticity and toughness of the workpiece are adjusted to meet the requirement of service performance; the structure and the size are stabilized, and the precision is ensured; improve and enhance the processing property.

At present, in a conventional tempering process, a well type tempering furnace which is frequently used needs to be periodically heated and cooled in a multi-tempering process, and consumed internal energy is mostly consumed in the atmosphere and is difficult to recover, so that energy waste is caused.

Disclosure of Invention

In order to improve the utilization ratio of internal energy when tempering the tempering furnace, the application provides a spring continuous type tempering furnace and tempering technology thereof.

The application provides a spring continuous type tempering furnace and tempering process thereof adopts following technical scheme:

in a first aspect:

the utility model provides a spring continuous type tempering furnace, includes the furnace body of a plurality of adjacent settings, be provided with the chamber that holds that the work piece was received in the furnace body, the furnace body hold the chamber lateral wall and include the inside wall and incite somebody to action the lateral wall of inside wall parcel, be provided with heating resistor on the inside wall, the lateral wall is the cavity setting and forms the hot oil pocket that is equipped with the heating oil, each the furnace body the hot oil pocket all communicates with each other the setting, and each be provided with the insulating layer between the furnace body, the lateral wall is provided with outward and is used for controlling the heating oil to remove to each the furnace body the oil circuit regulation structure in the hot oil pocket.

By adopting the technical scheme, the furnace bodies are mutually isolated through the heat-insulating layer so as to reduce the mutual influence caused by the temperature change among the furnace bodies, the side wall of the furnace body accommodating cavity is divided into the inner side wall and the outer side wall, and the inner side wall is provided with the heating resistor to provide a stable heating source for tempering the workpiece; hot oil cavities arranged in the outer side walls are communicated with each other, so that heating oil can be transferred among the furnace bodies through the oil way adjusting structure; when the hot oil cavity of one furnace body is filled with heating oil for tempering and heating, the heating oil in the furnace body is transferred into the hot oil cavity in the other furnace body through the oil way adjusting structure, so that the residual heat in the oil bath is utilized to temper the workpiece in the other tempering furnace, the utilization rate of internal energy is improved, and the production cost is reduced; and the same heating medium (heating oil) can be used for continuously tempering the workpiece for multiple times through the oil way adjusting structure.

Optionally, the oil path adjusting structure includes a piston block disposed in the hot oil cavity and a driving structure for driving the piston block, the piston block is slidably connected to a side wall of the hot oil cavity, the piston block divides the hot oil cavity into a cavity and an oil cavity, the hot oil cavities between the furnace bodies are communicated through a pipeline, a connecting hole of the pipeline is located on a side wall of the bottom end of the furnace body, and the piston block blocks the connecting hole of the pipeline when sliding to abut against the bottom surface of the furnace body.

By adopting the technical scheme, the hot oil cavity is divided into the cavity and the oil cavity through the piston block, wherein the oil cavities are communicated with each other, when the heating oil is transferred, the driving structure is started firstly to move the piston block towards the bottom of the furnace body, the heating oil in the oil cavity is pressed into the oil cavities of other furnace bodies by the piston block at the moment, and the piston block is connected with a pipeline between the hot oil cavities of the two furnace bodies to prevent the heating oil from flowing back so as to realize the transfer of the heating oil in the hot oil cavities of the furnace bodies.

Optionally, the drive structure including set up in the outer air pump of lateral wall, the air pump is connected with the trunk line, the trunk line connects in parallel has a plurality of tributary pipelines, each the tributary pipeline corresponds respectively the intercommunication each the furnace body the lateral wall the cavity, be provided with the on-off valve on the tributary pipeline.

Through adopting above-mentioned technical scheme, the air pump that sets up is the drive power that provides of piston piece, and the setting of trunk line and tributary pipeline is in order to impress the gaseous cavity respectively of air pump output to in order to carry out sectional type's accurate control to each tributary pipeline through the control of start-stop valve.

Optionally, a pressure relief hole communicated with the outside is formed in the side wall of the cavity, a pressure relief valve is arranged on the pressure relief hole, and an air pressure balancing opening capable of being opened and closed is further formed in the side wall of the cavity.

By adopting the technical scheme, the pressure relief hole and the pressure relief valve are arranged to ensure that the air pressure value in the cavity is stable when the air pump drives the piston block to increase the volume of the cavity, so that the heating oil in other furnace bodies filled with the heating oil is prevented from flowing back, and the effect of the safety valve is achieved; the air pressure balance hole is mainly used for discharging gas when heating oil flows into an oil cavity of the furnace body and the volume of the cavity is reduced, so that the heating oil can quickly flow into a hot oil cavity of the furnace body.

Optionally, the oil circuit is adjusted the structure include with the preheating cabinet that the oil pocket is linked together through the pipeline, with the batch oil tank that the preheating cabinet is linked together through the pipeline, the batch oil tank simultaneously with the oil pocket is linked together through the pipeline, the oil tank in pipeline series between the oil pocket has the oil smoke separator, and the junction of each pipeline all establishes ties and has opened the valve.

By adopting the technical scheme, the arranged preheating box can heat the heating oil in the preheating box to the tempering temperature and then flow into the oil cavity to play a preheating role; the oil storage tank provides and compensates heating oil for the oil cavity; the oil smoke separator is arranged to separate oil smoke generated by high temperature in the oil cavity.

Optionally, the side wall of the cavity is provided with a baffle plate for limiting the sliding range of the piston block, and the baffle plate divides the cavity into buffer areas.

Through adopting above-mentioned technical scheme, isolate the buffers from the cavity through the baffle, the buffers plays the effect of buffering as the chamber of keeping in of gas.

Optionally, the cross section of the outer side wall is arranged in a grid shape, the inner side wall is tightly abutted against the grid holes of the outer side wall, and the cross section of the hot oil cavity of each outer side wall is also arranged in a grid shape.

Through adopting above-mentioned technical scheme, the transversal latticed setting of personally submitting of lateral wall and hot oil cavity makes heating oil can pass through the latticed route that forms, lets the work piece in each inside wall be heated more evenly.

Optionally, it is provided with spring assembly to hold the intracavity, spring assembly be rectangular form and can dismantle connect in the interior bottom surface of furnace body, the coaxial cover of spring is located on the spring assembly, spring assembly includes a plurality of stoppers and spacer blocks, each the stopper with each the spacer block is crisscross each other and can dismantle the connection, be provided with on the spacer block and be used for two spring-separated extending structure.

Through adopting above-mentioned technical scheme, establish a plurality of coaxial covers of spring to the spring frock on, the spring frock is installing in the holding tank, is provided with extending structure on the spacer block, separates one by one in order to locate a plurality of springs on the spring frock with the cover through extending structure to the restriction spring is at the deformation of tempering process, and reduces the deformation that causes because the stack pressure of spring at the spring tempering in-process.

Optionally, extending structure includes the edge the radial slip that sets up of spacer block leads to the groove, slip is led to sliding connection in the groove and is had the gleitbretter, the slip leads to the groove orientation the fixed reset spring that is provided with of hole end department in the spacer block outside, gleitbretter fixed connection in reset spring keeps away from the one end in the spacer block outside, the stopper with the spacer block is annular setting and coaxial setting, the bottom can be dismantled in the furnace body and be connected with and be long banding pole of supporting, support the pole with the coaxial setting of spring frock tightly supports in each on the gleitbretter.

By adopting the technical scheme, the sliding sheet can realize sliding expansion along the sliding through groove by assembling the sliding sheet and the sliding through groove, when the sliding sheet is extruded by the abutting rod, the sliding sheet moves to the outer side of the spring tool to separate two adjacent springs and limit the two adjacent springs, so that each spring can have an independent heating space; when the spring tool is taken out of the abutting rod, the sliding sheet resets under the action of the reset spring, and the sliding sheet retracts into the spacing block.

In a second aspect:

a spring continuous tempering process comprises the following steps:

s1, mounting the spring on a tool and placing the tool in at least two tempering furnaces;

s2, adding preheated hot oil into the tempering furnace to carry out oil bath heating;

s3, after heating and keeping the temperature at a certain temperature, pumping the heating oil in the tempering furnace to another tempering furnace for heating, and naturally cooling the spring in the tempering furnace;

s4, after the spring in the tempering furnace is cooled, pumping the heating oil of another tempering furnace out of the tempering furnace for secondary tempering;

s5, repeating S3-S4 until the spring is tempered;

and S6, opening the end cover of the tempering furnace and taking out the spring.

By adopting the technical scheme, after the spring is placed in the tempering furnace, the spring is used as a medium for storing internal energy in an oil bath mode, and the heat energy of the medium is utilized by transferring the medium, so that the waste of the heat energy in the tempering process is reduced.

In summary, the present application at least includes the following beneficial technical effects:

1. by arranging the oil way adjusting structure and the hot oil cavity, the oil way adjusting structure and the hot oil cavity are matched to realize hot oil exchange of oil bath between the two furnace bodies, so that periodic hot oil interaction is realized, internal energy stored in heating oil is constantly in a tempering state for the spring, and the utilization rate of the internal energy during tempering of the furnace bodies is improved;

2. the spring frock that sets up separates every spring independently and spacing to the spring to the deformation of control spring in tempering process is in the requirement scope.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a structural sectional view of an embodiment of the present application.

Fig. 3 is a control loop diagram of an embodiment of the present application.

Fig. 4 is a side view of a structure of an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a spring tool according to an embodiment of the present application.

Description of reference numerals:

1. a furnace body; 2. an accommodating chamber; 3. an inner sidewall; 4. an outer sidewall; 5. a hot oil chamber; 501. a cavity; 502. an oil chamber; 6. a thermal insulation layer; 7. an oil path adjusting structure; 701. a piston block; 702. a drive structure; 7021. an air pump; 7022. a main pipeline; 7023. a branch pipeline; 8. a pressure relief vent; 9. an air pressure balancing port; 10. a pressure relief valve; 11. a preheating box; 12. an oil storage tank; 13. a fume separator; 14. a baffle plate; 15. a spring tool; 1501. a limiting block; 1502. a spacer block; 1503. a telescopic structure; 15031. a sliding through groove; 15032. sliding blades; 15033. a return spring; 15034. a support rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses spring continuous type tempering furnace. Referring to fig. 1, a spring continuous tempering furnace comprises two furnace bodies 1 which are adjacently arranged, the two furnace bodies 1 are separated by a heat insulation layer 6, the furnace bodies 1 are arranged in a cuboid shape and vertically arranged, the furnace bodies are arranged in a cover-opening furnace type, four rectangular accommodating cavities 2 which are the same in specification and are used for accommodating workpieces are vertically arranged in the furnace bodies 1, the side walls of the accommodating cavities 2 of the furnace bodies 1 comprise inner side walls 3 which are shaped like a Chinese character 'hui' and outer side walls 4 which completely wrap the inner side walls 3, the cross sections of the outer side walls 4 are integrally shaped like a Chinese character 'tian', and a plurality of heating resistors are arranged on the inner side walls 3 facing the accommodating cavities 2;

referring to fig. 1, 2 and 3, the outer side wall 4 is drawn out of a shell and is hollow to form a hot oil cavity 5 filled with heating oil, the hot oil cavity 5 of each furnace body 1 is communicated with each other through a pipeline, an oil path adjusting structure 7 for controlling the heating oil to move into the hot oil cavity 5 of each furnace body 1 is arranged on the outer side wall 4, the oil path adjusting structure 7 comprises a piston block 701 arranged in the hot oil cavity 5 and a driving structure 702 for driving the piston block 701, the piston block 701 is horizontally arranged, the cross section of the piston block is corresponding to the cross section of the hot oil cavity 5, the piston block 701 is slidably connected to the side wall of the hot oil cavity 5 in the vertical direction and divides the hot oil cavity 5 into a cavity 501 and an oil cavity 502, wherein the upper cavity is the cavity 501, the lower cavity is the oil cavity 502, the heating oil is located in the oil cavity 502, the oil cavities 502 between the two furnace bodies 1 are communicated through a pipeline, and the connecting hole of the pipeline is located at the side wall at the bottom end of the furnace bodies 1, when the piston block 701 slides and abuts against the bottom surface of the furnace body 1, the piston block 701 blocks the connecting hole of the pipeline.

The side wall of the cavity 501 is provided with an annular baffle plate 14 for limiting the sliding range of the piston block 701, and the baffle plate 14 divides the upper part of the cavity 501 into a buffer area.

Referring to fig. 2, fig. 3 and fig. 4, drive structure 702 is including setting up the air pump 7021 outside lateral wall 4, the subsidiary gas pitcher gas outlet intercommunication of air pump 7021 has trunk line 7022, trunk line 7022 has two tributary pipelines 7023 in parallel, each tributary pipeline 7023 is corresponding respectively and communicates in the cavity 501 of the lateral wall 4 of two furnace bodies 1, the connector is located the buffer area lateral wall, all be provided with the on-off valve on the tributary pipeline 7023, seted up on the buffer area lateral wall of cavity 501 with external communicating pressure release hole 8, be provided with relief valve 10 on the pressure release hole 8, the atmospheric pressure balance mouth 9 that can open and close has still been seted up on the cavity 501 lateral wall.

The oil path adjusting structure 7 further comprises a preheating tank 11 communicated with the oil chamber 502 through a pipeline, and an oil storage tank 12 communicated with the preheating tank 11 through a pipeline, wherein the oil storage tank 12 is simultaneously communicated with the oil chamber 502 through a pipeline, the pipelines of the oil tank between the oil chambers 502 are connected in series with an oil-smoke separator 13, and the joints of the pipelines are connected in series with an opening and closing valve.

Referring to fig. 2 and 5, the bottom surface of the accommodating cavity 2 of the furnace body 1 is detachably connected with a supporting rod 15034 in a long strip shape, the supporting rod 15034 is vertically arranged, the top end of the supporting rod 15034 is in a round top shape, a hollow spring tool 15 is arranged in the accommodating cavity 2, the spring tool 15 is in a long strip shape and is detachably connected to the inner bottom surface of the furnace body 1, the spring tool 15 is coaxially sleeved on the outer side of the supporting rod 15034, and the spring tool 15 is coaxially sleeved on the spring tool 15.

The spring tool 15 is composed of a plurality of annular limiting blocks 1501 and annular spacing blocks 1502, the limiting blocks 1501 and the spacing blocks 1502 are mutually staggered and detachably connected, and telescopic structures 1503 used for separating two springs are arranged on the spacing blocks 1502.

Extending structure 1503 includes the through groove 15031 of sliding along the radial setback 1502 that offers, and sliding connection has gleitbretter 15032 in the through groove 15031 of sliding, and the through groove 15031 of sliding is provided with reset spring 15033 towards the fixed in the fixed slide groove fluting direction in the hole end department in the spacer 1502 outside of sliding, and gleitbretter 15032 fixed connection keeps away from the one end in the spacer 1502 outside in reset spring 15033, supports pole 15034 and the coaxial setting of spring assembly 15 and tightly supports on each gleitbretter 15032.

Through the setting, the support rod 15034 is fixed at the bottom of the accommodating cavity 2, the spring tooling 15 which is pre-sleeved with a plurality of springs with the same specification is sleeved on the support rod 15034, and in the process of sleeving the spring tooling 15, the slide sheet 15032 is extruded by the support rod 15034 to form the spacing block 1502 on the slide sheet 15032 part, and the spacing block extrudes into the gap between the two springs to lift the spring above the spring, so that each spring is independently opened.

The implementation principle of the spring continuous tempering furnace in the embodiment of the application is as follows: the spring is placed on the spring tool 15, the spring tool 15 is installed in the accommodating cavity 2 of the furnace body 1, and after the end cover is closed, preheated heating oil is introduced into the oil cavity 502 of the furnace body 1 to perform heating and tempering treatment on the spring.

The embodiment of the application discloses a spring continuous tempering process, which comprises the following steps:

s1, mounting the springs on a plurality of tools, and respectively mounting the tools in the accommodating cavities 2 of the two tempering furnaces;

s2, heating the heating oil to a specified temperature, and pressing the hot oil into an oil cavity 502 of a tempering furnace;

s3, after heating and keeping the temperature at a certain temperature, pumping the heating oil in the tempering furnace to another tempering furnace for heating, and tempering the spring in the other tempering furnace to naturally cool the spring in the tempering furnace;

s5, repeating S3-S4 until the spring is tempered for multiple times;

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a spring continuous type tempering furnace which characterized in that: furnace body (1) including a plurality of adjacent settings, be provided with the chamber (2) that holds that receives the work piece in furnace body (1), furnace body (1) hold chamber (2) lateral wall including inside wall (3) and will outside wall (4) of inside wall (3) parcel, be provided with heating resistor on inside wall (3), outside wall (4) are cavity setting and form hot oil pocket (5) that are equipped with the heating oil, each furnace body (1) hot oil pocket (5) all communicate with each other and set up, and each be provided with insulating layer (6) between furnace body (1), outside wall (4) are provided with and are used for controlling the heating oil to remove to each furnace body (1) oil circuit regulation structure (7) in hot oil pocket (5).

2. A spring continuous tempering furnace according to claim 1, characterized in that: oil circuit regulation structure (7) including set up in piston block (701) in hot-oil chamber (5) and drive structure (702) of piston block (701), piston block (701) sliding connection in the lateral wall of hot-oil chamber (5), piston block (701) will hot-oil chamber (5) are separated for cavity (501) and oil pocket (502), each between furnace body (1) hot-oil chamber (5) are linked together through the pipeline, and the connecting hole of this pipeline is located the bottom lateral wall of furnace body (1), just piston block (701) slide to tightly block up the connecting hole of pipeline when supporting furnace body (1) bottom surface.

3. A spring continuous tempering furnace according to claim 2, characterized in that: drive structure (702) including set up in air pump (7021) outside lateral wall (4), air pump (7021) are connected with trunk line (7022), trunk line (7022) parallel connection has a plurality of tributary pipelines (7023), each tributary pipeline (7023) correspond respectively communicate each furnace body (1) lateral wall (4) cavity (501), be provided with the on-off valve on tributary pipeline (7023).

4. A spring continuous tempering furnace according to claim 3, characterized in that: the side wall of the cavity (501) is provided with a pressure relief hole (8) communicated with the outside, the pressure relief hole (8) is provided with a pressure relief valve (10), and the side wall of the cavity (501) is further provided with an air pressure balancing opening (9) capable of being opened and closed.

5. A spring continuous type tempering furnace according to claim 2, characterized in that: oil circuit regulation structure (7) include with preheating tank (11) that oil pocket (502) are linked together through the pipeline, with oil storage tank (12) that preheating tank (11) are linked together through the pipeline, oil storage tank (12) simultaneously with oil pocket (502) are linked together through the pipeline, oil storage tank (12) in pipeline series connection between oil pocket (502) has oil smoke separator (13), and the junction of each pipeline all establishes ties and has the valve that opens and shuts.

6. A spring continuous tempering furnace according to claim 2, characterized in that: the side wall of the cavity (501) is provided with a baffle (14) for limiting the sliding range of the piston block (701), and the baffle (14) divides the cavity (501) into buffer areas.

7. A spring continuous tempering furnace according to claim 1, characterized in that: the cross section of the outer side wall (4) is arranged in a grid shape, the inner side wall (3) is tightly propped against the grid holes of the outer side wall (4), and the cross section of the hot oil cavity (5) of each outer side wall (4) is also arranged in a grid shape.

8. A spring continuous type tempering furnace according to claim 1, characterized in that: it is provided with spring frock (15) in chamber (2) to hold, spring frock (15) are rectangular form and can dismantle connect in the interior bottom surface of furnace body (1), the coaxial cover of spring is located on spring frock (15), spring frock (15) include a plurality of stopper (1501) and spacer (1502), each stopper (1501) and each spacer (1502) are crisscross each other and can dismantle the connection, be provided with on spacer (1502) and be used for two spring-separated extending structure (1503).

9. The spring continuous type tempering furnace according to claim 8, wherein: extending structure (1503) includes follows the radial slip through groove (15031) of seting up of interval piece (1502), sliding connection has gleitbretter (15032) in through groove (15031), slip through groove (15031) orientation the fixed reset spring (15033) that is provided with of hole end department in interval piece (1502) outside, gleitbretter (15032) fixed connection in reset spring (15033) are kept away from the one end in interval piece (1502) outside, stopper (1501) with interval piece (1502) are annular setting and coaxial setting, the bottom surface can be dismantled and be connected with and be rectangular form support pole (15034) in furnace body (1), support pole (15034) with spring frock (15) coaxial setting and tightly support in each on gleitbretter (15032).

10. A spring continuous tempering process based on the spring continuous tempering furnace of any one of the above claims 1 to 9, comprising the steps of:

s5, repeating S3-S4 until the spring is tempered;