CN210237675U

CN210237675U - Drag chain type stepping heating equipment

Info

Publication number: CN210237675U
Application number: CN201920749618.6U
Authority: CN
Inventors: Xiangrong Yang; 杨向荣
Original assignee: AICHELIN HEAT TREATMENT SYSTEMS (BEIJING) CO LTD
Current assignee: AICHELIN HEAT TREATMENT SYSTEMS (BEIJING) CO LTD
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-04-03
Anticipated expiration: 2029-05-23

Abstract

The utility model discloses a step-by-step firing equipment of tow chain formula, include: the heating furnace comprises a heating furnace body, a heating furnace chamber is formed in the heating furnace body, a heating device is arranged in the heating furnace chamber, a front furnace door and a rear furnace door are arranged on two opposite sides of the heating furnace body, a drag chain device is fixedly arranged on a bottom plate of the heating furnace body, a drag chain capable of being driven to move back and forth is arranged at the upper part of the heating furnace body, two ends of the drag chain device are respectively positioned at the front furnace door and the rear furnace door, and at least one group of in-furnace lifting devices are arranged on; the at least one workpiece which is sent into the heating furnace chamber and is placed on the drag chain of the drag chain device is lifted, supported and descended through the at least one group of in-furnace lifting devices, so that the drag chain of the drag chain device is matched to move back and forth to heat the at least one workpiece. Therefore, the utility model discloses have heating furnace body part long service life and easy maintenance, be applicable to various shapes and bear the heat treatment and the heat treatment efficiency height of the work piece in the frock, the heat waste is little and can realize continuous production's beneficial effect.

Description

Drag chain type stepping heating equipment

Technical Field

The utility model belongs to the technical field of the thermal treatment of spare part and specifically relates to a step-by-step firing equipment of tow chain formula is related to.

Background

In recent decades, with the rapid development of industrial technologies in China, various advanced heat treatment technologies with high efficiency, high quality, energy conservation and environmental protection are widely applied in industrial production, and heat treatment process technologies and equipment are continuously developed. The method is particularly obvious in the aspects of heat treatment process and equipment of automobile parts, the development of the automobile industry in China for decades is very attractive, the automobiles bring convenience to people and simultaneously bring three problems of oil consumption, safety and environmental protection, one of the important ways for solving the three problems is to lighten the automobiles, namely, the automobile parts are manufactured by thinner steel plates, the lightening of the automobiles must be on the premise of ensuring the safety of drivers and passengers, and therefore, an important solution is to manufacture the parts of automobile bodies by using high-strength steel. Since the ductility of high-strength steel at normal temperature is inferior to that of conventional car body steel, the problem of difficult forming in a cold state is encountered, and it is necessary to heat the high-strength steel to a high temperature to increase the ductility thereof, and then hot-press-form and rapidly cool the high-strength steel at a high temperature to ensure that the cold-formed parts have not only high strength but also high ductility. One of the most important devices in heating and cooling parts is a heating device.

Currently, the equipment used by each large automobile part production plant for heat treatment of high-strength steel is only two types, namely a roller-type heating furnace and a box-type heating furnace. The roller type heating furnace is limited in width and small in bearing capacity when facing a roller in the application process, the roller is easy to break and is not easy to replace and maintain after being broken, the roller is easy to corrode a coating on the surface of a part or form a bonding residue, the positioning precision of the roller on the part is not high, so that the transmission accuracy of the part is affected, an emergency standby power supply is required to prevent the roller from deforming and damaging when the roller type heating furnace is shut down, the heat loss on the surface of the roller type heating furnace is large, the energy-saving effect is poor, and the roller type heating furnace is not suitable for heat treatment of the part needing to be loaded by a tool and is only suitable for treating the part of a flat plate type; the biggest problem of the box-type heating furnace in the application process is that the automatic continuous production is not easy to realize.

SUMMERY OF THE UTILITY MODEL

In view of the technical defects of the existing part heating treatment equipment, the technical problem to be solved by the technical scheme is to provide the towline type stepping heating equipment, the fireproof high-temperature-resistant towline with certain freedom degree of movement is matched with the lifting device in the furnace to realize the stepping transmission of the parts to be heated in the heating furnace, so that the heating equipment has large bearing capacity, the part transmission device is not easy to damage, easy to maintain and long in service life, the part transmission positioning precision is high, the towline type stepping heating equipment is suitable for the heat treatment process of the parts with various shapes and needing to be borne in the tool, the heat loss of a furnace body of the heating equipment is small, and the continuous production can be realized.

In order to achieve the above object, the present technical solution provides a drag chain type step heating apparatus, comprising: the heating furnace body, this heating furnace body includes: the furnace comprises a heating furnace chamber, a heating device, a front furnace door, a rear furnace door, a drag chain device and at least one group of in-furnace lifting devices; the heating furnace chamber is formed in the heating furnace body, the heating device is arranged in the heating furnace chamber, the front furnace door and the rear furnace door are respectively arranged on two opposite sides of the heating furnace body, the drag chain device is positioned in the heating furnace chamber and fixedly arranged on a bottom plate of the heating furnace body, the upper part of the drag chain device is provided with a drag chain which can be driven to move back and forth, two ends of the drag chain device are respectively positioned at the front furnace door and the rear furnace door, and at least one group of in-furnace lifting devices are arranged on the bottom plate of the heating furnace body below the drag chain device; the at least one workpiece is lifted, supported and descended by at least one group of in-furnace lifting devices to be placed on the drag chain of the drag chain device, so that the drag chain of the drag chain device moves back and forth to heat the at least one workpiece.

As another implementation of the present technical solution, the drag chain apparatus includes: the heating furnace comprises at least one group of drag chain supporting slide rails, at least one group of drag chains and at least one drag chain driving motor, wherein the at least one group of drag chain supporting slide rails are fixedly arranged on a bottom plate of the heating furnace body, two ends of the at least one group of drag chain supporting slide rails are respectively positioned at a front furnace door and a rear furnace door, the at least one group of drag chains are correspondingly embedded on the at least one group of drag chain supporting slide rails, and the at least one drag chain driving motor is arranged outside the heating furnace body and is connected with and drives the at least one group of drag chains to slide on the at least one. Therefore, one or more groups of drag chain supporting slide rails and drag chains matched with the same can be flexibly arranged in the heating furnace body, so that the heating equipment can meet the requirements of different production capacities and production efficiencies.

As another implementation of the technical solution, each group of the tow chain support slide rails includes at least two tow chain support slide rails, a rail groove is formed in the upper portion of each tow chain support slide rail, each group of the tow chains includes at least two tow chains, the tow chains are correspondingly embedded in the rail groove, the number of the tow chain drive motors is two, the tow chain drive motors are divided into a feed end tow chain drive motor and a discharge end tow chain drive motor, and the feed end tow chain drive motors and the discharge end tow chain drive motors are respectively arranged on the outer sides of the front furnace door and the rear furnace door, the feed end tow chain drive motor is connected with the feed end of the drive tow chain, the discharge end tow chain drive motor is connected with the discharge end of the drive tow chain, and the tow chain is driven to travel for a further distance back and forth through alternate interval operation of the.

As another implementation of the technical scheme, the drag chain device further comprises a plurality of chains, two drag chain tensioning devices, a plurality of chain wheels and two transmission shafts, wherein the feeding end or the discharging end of the drag chain extends outwards for an extension distance which is not less than the stepping distance, so that the drag chain made of refractory and high-temperature-resistant materials is in a high-temperature heating furnace chamber during the back-and-forth traveling process, and other components on the drag chain device are prevented from entering the heating furnace chamber and being damaged by high temperature during the back-and-forth traveling process; the one end of this several chains corresponds the feed end and the discharge end of connecting the tow chain respectively, the other end of several chains is connected respectively and is set up in two tow chain overspeed device tensioner in the front furnace door outside and the back furnace door outside, the several sprocket is fixed in respectively on two transmission shafts, the output of feed end tow chain driving motor and discharge end tow chain driving motor's output are connected respectively to two transmission shafts, the several sprocket corresponds meshes several chains, through feed end tow chain driving motor and the mutual alternate interval of discharge end tow chain driving motor operation step-by-step time, drive the chain with the drive sprocket and make the tow chain come and go this step-by-step distance of marcing. The drag chain tensioning device can adopt various modes such as power tensioning or counterweight tensioning, the configuration of the drag chain tensioning device can enable the drag chain to be tensioned and stably embedded on the drag chain supporting slide rail, and the plurality of drag chains keep synchronously advancing under the connection driving of the plurality of chains.

As another implementation of the technical scheme, the drag chain device further comprises a plurality of drag chain lubricating blocks, and the plurality of drag chain lubricating blocks are uniformly distributed in the rail groove. Therefore, the drag chain lubricating block is tightly attached to the drag chain and always keeps contact with the friction surface of the drag chain in a high-temperature environment, so that the abrasion of the drag chain in the process of traveling is reduced, and the service life of the drag chain is prolonged.

As another implementation of the technical solution, each group of in-furnace lifting devices includes a lifting driving motor, a lifting structure, a plurality of lifting columns and a plurality of supporting beams, the lifting driving motor is disposed outside the heating furnace body, the lifting structure is disposed on the lower portion outside the heating furnace body, the plurality of lifting columns are symmetrically disposed on the upper portion of the lifting structure, and the upper ends of the plurality of lifting columns penetrate through the bottom of the heating furnace body and extend into the heating furnace chamber and are located on both sides of a drag chain supporting slide rail of the drag chain device, the plurality of supporting beams are parallel to the drag chain supporting slide rail and are respectively fixed on the upper ends of the plurality of lifting columns, the lifting driving motor drives the lifting structure to horizontally ascend or descend, thereby driving the plurality of supporting beams to be higher or lower than the drag chain supporting slide rail, so as to support a workpiece on the drag chain, or place.

As another kind of implementation of this technical scheme, still include feeder and ejection of compact machine, feeder and ejection of compact machine set up respectively in the forehearth outside and the back furnace gate outside, feeder and ejection of compact machine all include the frame, the material yoke, the material fork, material fork elevating gear and material fork translation device, the material yoke, material fork elevating gear and material fork translation device all set up in the frame, the material fork level sets up on the material yoke, thereby the material fork elevating gear can drive the material yoke and drive the material fork and rise or descend, thereby the material fork translation device can drive the material yoke and drive the material fork level front, back, left and right removal. The feeder and the discharging machine can replace manual work for loading and unloading the workpieces, so that the heat treatment efficiency and the operation standardization degree of the heating equipment for the workpieces can be effectively improved, and the investment of labor cost can be reduced.

As another implementation of the technical scheme, the device further comprises a tool lifting device and at least one tool returning and storing device; the tool lifting device comprises four stand columns, a discharge end tool lifting device and a feed end tool lifting device, wherein the four stand columns are respectively and vertically fixed on two sides outside the front furnace door and two sides outside the rear furnace door, and the discharge end tool lifting device and the feed end tool lifting device are respectively arranged on two stand columns outside the rear furnace door and two stand columns outside the front furnace door; at least one tool returning and storing device is positioned above the heating furnace body and is fixedly arranged on the four upright posts from bottom to top in sequence, and the tool returning and storing device receives tools conveyed by the tool lifting device at the discharge end so as to store the tools or convey the tools to the tool lifting device at the feed end. Therefore, when the heating equipment uses the tool to bear the workpiece for heat treatment, the tool returning and storing device can replace manual work to carry the tool, continuous use of the tool can be realized, and the production efficiency of the heating equipment is improved.

As another implementation of the technical scheme, the discharge end tool lifting device and the feed end tool lifting device are identical in structure and are composed of a pair of tool lifting material forks, each tool lifting material fork comprises a lifting driving device, a lifting material fork arm, a tool material fork and a material fork telescopic driving device, the lifting driving devices are arranged on the lifting material fork arms, one ends of the lifting material fork arms are arranged on the stand columns, the lifting material fork arms are driven by the lifting driving devices and can move up and down along the stand columns, the other ends of the lifting material fork arms are provided with the tool material fork and the material fork telescopic driving devices, and the two tool material forks of the discharge end tool lifting device and the feed end tool lifting device are arranged in opposite directions and driven by the material fork telescopic driving devices to clamp or release the tools.

As another implementation of the technical scheme, the tool returning and storing device comprises a tool bracket, at least two sets of main chains, a chain driving motor, a feeding end overturning bracket, a discharging end overturning bracket and a plurality of overturning drivers, wherein the tool bracket is horizontally and fixedly arranged on four upright posts, two end parts of the tool bracket are respectively provided with a main rotating shaft arranged through a bearing, at least two main chain sprockets and a main sprocket are respectively and correspondingly fixed on the two main rotating shafts, at least two sets of main chains are arranged on the tool bracket, two ends of each main chain are sleeved and meshed with the at least two main chain sprockets, the chain driving motor is arranged at one end part of the tool bracket and is in driving connection with the adjacent main rotating shaft, the feeding end overturning bracket and the discharging end overturning bracket are hinged on the main rotating shafts at the two end parts of the tool bracket through bearings, the end parts, adjacent to the tool bracket, on the feeding end overturning bracket and the discharging, the two driven rotating shafts are respectively and correspondingly fixed with at least two driven chain sprockets and one driven sprocket, the feeding end overturning bracket and the discharging end overturning bracket are respectively provided with at least two sets of driven chains, the driven chains are adjacent to the driven chains and are sleeved at the end parts of the driven rotating shafts and are meshed with the corresponding driven chain sprockets, the two driven sprockets on the driven rotating shafts and the main sprockets on the two main rotating shafts are correspondingly linked through two sets of transmission chains, one ends of a plurality of overturning drivers are respectively hinged at the two end parts of the tool bracket, and the other ends of the plurality of overturning drivers are respectively hinged at the bottoms of the feeding end overturning bracket and the discharging.

Compared with the existing part heat treatment equipment, the technical scheme has the advantages that the bearing capacity of parts in the heating furnace body is large, the drag chain is not easy to damage, easy to maintain and long in service life, the positioning precision of the drag chain for part transmission is high, the drag chain is suitable for heat treatment processes of parts in various shapes and needing to be borne in the tool, the heat loss of the heating furnace body is small, a standby power supply does not need to be configured in maintenance, and the heating equipment can achieve the beneficial technical effect of continuous production.

Drawings

Fig. 1 is a schematic view of a first embodiment of a drag chain type step heating apparatus of the present invention;

fig. 2 is a schematic cross-sectional view of a first embodiment of the drag chain type step heating apparatus of the present invention;

FIG. 3 is a schematic structural view of a drag chain in the drag chain type step heating apparatus of the present invention;

fig. 4 is a schematic view of a second embodiment of the drag chain type step heating apparatus of the present invention;

fig. 5 is a schematic cross-sectional view of a second embodiment of the drag chain type step heating apparatus of the present invention;

fig. 6 is a schematic view of the tool lifting device and the tool return and storage device in the second embodiment of the drag chain type step heating device of the present invention;

fig. 7 is a schematic view of a first state of a feed end turning bracket in a second embodiment of the drag chain type step heating apparatus of the present invention;

fig. 8 is a schematic view of a second state of the feed end turning bracket in the second embodiment of the drag chain type step heating apparatus of the present invention.

Symbolic illustration in the drawings:

1 heating a furnace body; 11 heating the furnace chamber; 2, front furnace door; 3, a rear furnace door; 4, a heating device; 41 customizing a heater; 5, a drag chain device; 51 a drag chain supporting slide rail; 52, towing chain; 521 single link; 522 a connecting sheet; 523 connecting pin; 53 drag chain tensioning device; 54 chain wheel; 55 a drive shaft; 6 a furnace lifting device; 61 lifting structure members; 62 lifting columns; 63 a support beam; 71 a feeder; 72 discharging machine; 73 a frame; 74 material fork arms; 75 material forks; 8, a tool lifting device; 81 lifting a material fork arm; 82, a tooling material fork; 83 material fork telescopic driving device; 9 tool return and storage device; 91 upright column; 92 tooling brackets; 93 a main chain; 94 chain drive motors; 95 turning over the bracket at the feed end; 96 discharge end turning bracket; 97 a flip driver; 921 main rotating shaft; 922 a main chain sprocket; 923 a main chain wheel; 951 a slave shaft; 952 from the chain sprocket; 953 a slave sprocket; 954 from a chain; 96 drive chains; 10, workpiece; and (12) assembling.

Detailed Description

The following detailed description and technical contents of the present invention are described with reference to the drawings, but the drawings are only for reference and illustration and are not intended to limit the present invention.

The utility model provides a step-by-step firing equipment of tow chain formula, it mainly is applied to the heat treatment production to the steel spare part of shapes such as flat board class, stick class, tubulose class, special-shaped structure class, especially is fit for the heat treatment production of automobile body part.

As shown in fig. 1 and 2, in order to implement the first embodiment of the present invention, it includes: a heating furnace body 1, the heating furnace body 1 comprising: a heating furnace chamber 11, a heating device 4, a front furnace door 2, a rear furnace door 3, a temperature control system (not shown), a drag chain device 5 and at least one group of in-furnace lifting devices 6; the heating furnace chamber 11 is formed in the heating furnace body 1, the heating device 4 is arranged in the heating furnace chamber 11, the front furnace door 2 and the rear furnace door 3 are respectively arranged at two opposite sides of the heating furnace body 1, the drag chain device 5 is positioned in the heating furnace chamber 11 and fixedly arranged on a bottom plate of the heating furnace body 1, the upper part of the drag chain device 5 is provided with a drag chain 52 which can be driven to move back and forth, two ends of the drag chain device 5 are respectively positioned at the front furnace door 2 and the rear furnace door 3, and at least one group of in-furnace lifting devices 6 are arranged on the bottom plate of the heating furnace body 1 below the drag chain device 5; the at least one workpiece 10 is heated by the at least one group of in-furnace elevating devices 6 to support and lower the at least one workpiece 10 which is fed into the heating furnace chamber 11 and placed on the drag chain 52 of the drag chain device 5, in cooperation with the drag chain 52 of the drag chain device 5 to travel back and forth. The utility model provides a heating furnace chamber 11 is under temperature control system's control, and its inside highest operating temperature can reach 1050 ℃, and general operating temperature interval is less than or equal to 1000 ℃, and the atmosphere of 11 inside heating furnace chambers can be the air atmosphere, also can be protective atmosphere, and the size and the shape of heating furnace chamber 11 are not fixed unchangeable, can be according to the nimble customization of work piece 10 shape and thermal treatment process's requirement. In addition, the heating temperature raising element of the heating device 4 may be an electric heating element or a gas-fired heating element. In addition, a customized heater 41 can be further installed in the heating furnace chamber 11, and the customized heater 41 can perform local customized heating on the workpiece 10 with special heat treatment requirements, so as to realize special requirements of different mechanical properties of different parts of the workpiece after quenching.

In detail, the drag chain device 5 includes: at least one set of drag chain support slide rails 51, at least one set of drag chains 52 and at least one drag chain drive motor (not shown). Wherein, this at least a set of tow chain supporting slide rail 51 sets firmly on the bottom plate of heating furnace body 1, its both ends are located preceding furnace gate 2 department and back furnace gate 3 department respectively, at least a set of tow chain 52 corresponds to inlay and locates on at least a set of tow chain supporting slide rail 51, at least a tow chain driving motor sets up and slides and come and go to and go on in at least a set of tow chain supporting slide rail 51 outside heating furnace body 1 and connecting at least a set of tow chain 52 of drive, from this, can lay a set of or multiunit tow chain supporting slide rail 51 and the tow chain 52 of supporting with it in heating furnace body 1 in a flexible way according to the volume of heating furnace room 11 and the specification and size of treating the thermal treatment work piece, so that the utility model discloses a tow chain type step-by-step heating equipment can satisfy the demand. In the present invention, each group of the drag chain supporting slide rails 51 may include at least two drag chain supporting slide rails 51 according to the specification and size of the workpiece to be heat-treated, a rail groove (not shown) is formed on the upper portion of each group of the drag chain supporting slide rails 51, each group of the drag chain 52 matched with the group of the drag chain supporting slide rails 51 includes at least two drag chains 52, the drag chain 52 is correspondingly embedded in the rail groove, in this embodiment, the explanation is made by that each group of the drag chain supporting slide rails 51 includes two drag chain supporting slide rails 51 and each group of the drag chains 52 includes two drag chains 52; the quantity of the drag chain driving motors is two, the two drag chain driving motors are divided into a feeding end drag chain driving motor and a discharging end drag chain driving motor, the feeding end drag chain driving motors are respectively arranged on the outer side of the front furnace door and the outer side of the rear furnace door, the feeding end drag chain driving motors are connected with the feeding end of the driving drag chain, the discharging end of the driving drag chain is connected with the discharging end of the discharging end drag chain driving motor, the feeding end drag chain driving motors and the discharging end drag chain driving motors alternately run for a further time at intervals, and the drag chain is made to travel to and fro for a further distance.

More specifically, the drag chain device further includes a plurality of chains (not shown), two drag chain tensioners 53, a plurality of chain wheels 54 and two transmission shafts 55, wherein the feeding end or the discharging end of the drag chain 52 extends outwards for an extension distance not less than the stepping distance, so that the drag chain 52 made of refractory and high temperature resistant materials can be in the heating furnace chamber 11 with high temperature during the reciprocating movement of the drag chain device 5, and the other parts of the drag chain device 5 can be prevented from entering the heating furnace chamber 11 and being damaged by high temperature during the reciprocating movement; one end of the chains is respectively correspondingly connected with the feeding end and the discharging end of the drag chain, the other end of the chains is respectively connected with two drag chain tensioning devices 53 arranged at the outer sides of the front furnace door 2 and the rear furnace door 3, the drag chain tensioning devices 53 can adopt various modes such as power tensioning or counterweight tensioning, etc., in the embodiment, the mode of counterweight tensioning is explained, the drag chain tensioning devices 53 (counterweights) are in a suspended state after being connected with the chains, the drag chain is tensioned and stably embedded in a rail groove of a drag chain supporting slide rail by self weight, the chain wheels 54 are respectively fixed on two transmission shafts 55, the two transmission shafts 55 are respectively connected with the output end of a feeding end drag chain driving motor and the output end of a discharging end drag chain driving motor, the chain wheels 54 are correspondingly engaged with the chains, and the feeding end drag chain driving motor and the discharging end drag chain driving motor alternately run for a stepping time at intervals, the driving sprocket 54 drives the chain to make the drag chain 52 travel back and forth for the step distance, wherein the drag chain tensioning device 53 is configured to make the drag chain 52 tightly and stably embedded in the track groove of the drag chain supporting slide rail 51, and make the plurality of drag chains 52 keep synchronously traveling under the connection driving of the plurality of chains. In addition, in order to reduce the degree of wear of tow chain between the track groove of in-process and tow chain supporting slide rail, reduce coefficient of friction, prolong its life, the tow chain device has still included several tow chain lubricating block (not marked in the figure), and this several tow chain lubricating block evenly lays in the track inslot, so that tow chain and tow chain lubricating block closely laminate, and make the tow chain lubricating block keep the contact with the tow chain friction surface all the time under high temperature environment, this tow chain lubricating block can adopt graphite lubricating block etc. the utility model discloses kind to the tow chain lubricating block is not injectd.

As shown in fig. 3, the drag chain 52 of the present invention is a strip-shaped chain assembly with a certain degree of freedom of movement, which is composed of a plurality of strip-shaped single chain links 521, a plurality of connecting pieces 522 and a plurality of connecting pins 523, through holes (not shown) are respectively penetrated through both ends of the single chain links 521, through holes (not shown) are respectively arranged at both ends of the connecting pieces 522, the connecting pieces 522 are arranged across the adjacent ends of the two single chain links 521, so that the two through holes on the connecting pieces 522 are aligned to the through holes on the adjacent ends of the two single chain links 521 and penetrate into the connecting pins 523 to connect the plurality of single chain links 521 in series to form the drag chain 52. The shape of the single link 521 can be designed according to the shape, weight, etc. of the workpiece and the tool, and the single link 521, the connecting piece 522 and the connecting pin 523 are all made of fireproof and high temperature resistant materials, such as steel materials, silicon carbide materials or ceramic materials. The chain in the utility model can be a roller chain.

As shown in fig. 1 and 2, the lifting device 6 in the furnace of the present invention can be a group or a plurality of groups, each group of lifting device 6 in the furnace comprises a lifting driving motor (not shown), a lifting structure 61, a plurality of lifting columns 62 and a plurality of supporting beams 63, the lifting driving motor is disposed outside the heating furnace body, the lifting structure 61 is disposed at the lower portion outside the heating furnace body 1, the plurality of lifting columns 62 are symmetrically disposed at the upper portion of the lifting structure 61, the upper ends of the plurality of lifting columns 62 penetrate through the bottom of the heating furnace body 1 and extend into the heating furnace chamber 11 and are located at two sides of the tow chain supporting slide rail 51 of the tow chain device 5, the plurality of supporting beams 63 are parallel to the tow chain supporting slide rail 51 and are respectively fixed at the upper ends of the plurality of lifting columns 62, the lifting driving motor drives the lifting structure 61 to rise or fall horizontally, thereby driving the plurality of supporting beams 63 to, this supports and lifts the workpiece 10 on the drag chain 52 or places the workpiece 10 on the drag chain 52 in accordance with the reciprocating travel of the drag chain 52.

The utility model discloses a still include feeder 71 and ejection of compact machine 72 in the first embodiment, this feeder 71 and ejection of compact machine 72 set up respectively in the 2 outside of preceding furnace gates and the 3 outsides of back furnace gates, feeder 71 and ejection of compact machine 72's the same structure and all include frame 73, material fork arm 74, material fork 75, material fork elevating gear (the picture is not marked) and material fork translation device (the picture is not marked), wherein, material fork arm 74, material fork elevating gear and material fork translation device all set up on frame 73, material fork 75 level sets up on material fork arm 74, thereby material fork elevating gear can drive material fork arm and drive material fork and rise or descend, thereby material fork translation device can drive material fork arm and drive material fork level before, after, left and right movement. Wherein, material fork elevating gear and material fork translation device can be for the drive arrangement who comprises driving motor, gear and rack, or be the drive arrangement who comprises driving motor, track, sprocket and chain, or for the drive arrangement that driving motor and the driving piece that has inside and outside screw thread constitute, or for the drive arrangement that hydraulic pressure, atmospheric pressure cylinder body constitute, the utility model discloses it is not restricted to the drive structure of material fork elevating gear and material fork translation device. The shape of the fork 75 depends on the workpiece to be heat treated and is made of a fireproof and high temperature resistant material, such as a steel material or a silicon carbide material, a ceramic material, a composite material, etc. In addition, in order to reduce the heat loss of the heating furnace body when the discharging machine 72 takes out the workpiece or the tool carrying the workpiece, an opening (not shown) is further formed on the rear furnace door, an openable discharging door (not shown) is arranged outside the opening, when the discharging machine takes out the workpiece or the tool carrying the workpiece, firstly the discharging door is opened, the discharging machine fork extends into the heating furnace chamber from the opening to take out the workpiece or the tool carrying the workpiece, then the rear furnace door is opened, the discharging machine fork rapidly moves out from the heating furnace chamber to take out the workpiece or the tool carrying the workpiece, the rear furnace door and the discharging door are closed, in order to ensure the operation of taking out the workpiece or the tool carrying the workpiece, the opening is communicated with one edge of the rear furnace door, the rear furnace door can be opened in a sliding manner in a direction opposite to the direction of the edge communicated with the opening, and the rear furnace door can be opened when the discharging machine fork takes out the workpiece or the tool, the operation of the discharging machine for taking materials and whether the rear furnace door is opened or not can be determined according to the size, the category and the operation requirement of a workpiece or a tool. This feeder 71 and ejection of compact machine 72's outfit can replace the manual work to the work piece or the loading and the operation of unloading of frock, can effectively promote the utility model discloses the step-by-step firing equipment of tow chain is to the heat treatment efficiency and the operation standardization level of work piece to can reduce the input of cost of labor.

The utility model discloses a step-by-step firing equipment of tow chain can also satisfy the heat treatment operation that needs to bear the work piece in the middle of the frock to can realize the return and the deposit of non-manually operation's frock. As shown in fig. 4 to 8, for the second embodiment of the present invention, the towline type step heating device further includes a tool lifting device 8 and at least one tool returning and storing device 9. The tool lifting device 8 comprises four upright posts 91, a discharge end tool lifting device and a feed end tool lifting device, wherein the four upright posts 91 are respectively and vertically fixed on two sides outside a front furnace door 2 and two sides outside a rear furnace door 3, the discharge end tool lifting device and the feed end tool lifting device are respectively arranged on the two upright posts 91 outside the rear furnace door 3 and the two upright posts 91 outside the front furnace door 2, the discharge end tool lifting device and the feed end tool lifting device have the same structure and are respectively composed of a pair of tool lifting material forks, each tool lifting material fork comprises a lifting driving device (not marked in the figure), a lifting material fork arm 81, a tool material fork 82 and a material fork telescopic driving device 83, the lifting driving device is arranged on the lifting material fork arm, the lifting driving device can be a driving device composed of a driving motor, a track, a chain wheel and a chain, or a driving device composed of a driving motor, a gear and a rack, or a driving device composed of a driving motor and a driving piece with internal and external threads, the driving structure of the lifting driving device is not limited by the utility model, one end of the lifting fork arm 81 is disposed on the column 91, and more specifically, the lifting fork arm 81 may be disposed with a guide wheel (not shown), the upright 91 may be provided with a vertical guide rail (not shown), the guide wheel is embedded in the guide rail so that the lifting fork arm can be driven by the lifting driving device to move up and down along the upright, the other end of the lifting fork arm 81 is provided with a work material fork 82 and a material fork telescopic driving device 83, the material fork telescopic driving device 83 can be a pneumatic or hydraulic cylinder, and the two work material forks 82 of the discharge end tool lifting device and the feed end tool lifting device are oppositely arranged and driven by the material fork telescopic driving device 83 to clamp or release the tool.

The at least one tool returning and storing device 9 is located above the heating furnace body 1 and is fixedly arranged on the four upright posts 91 from bottom to top in sequence, and the tool returning and storing device 9 is a tool 12 used for receiving the conveying of the tool lifting device at the discharge end so as to store the tool 12 or convey the tool 12 to the tool lifting device at the feed end. As shown in fig. 4, in the present embodiment, two tool returning and storing devices 9 are illustrated, wherein the tool returning and storing device 9 below is mainly used for the operation of returning the tool 12 from the discharging end to the feeding end, and the tool returning and storing device 9 above is mainly used for the storage of the tool 12. Accordingly, when the heating equipment uses the tool 12 to carry a workpiece for heat treatment, the tool returning and storing device 9 can replace manual carrying operation on the tool 12, and continuous use of the tool can be realized, so that the production efficiency of the heating equipment is improved. More specifically, the tool returning and storing device 9 includes a tool bracket 92, at least two sets of main chains 93, a chain driving motor 94, a feeding end turning bracket 95, a discharging end turning bracket 96 and a plurality of turning drivers 97, the tool bracket 92 is horizontally fixed on four columns 91, two ends of the tool bracket 92 are respectively provided with a main rotating shaft 921 arranged through bearings, two main rotating shafts 921 are respectively and correspondingly fixed with at least two main chain sprockets 922 and a main chain sprocket 923, at least two sets of main chains 93 are arranged on the tool bracket 92 and are sleeved and meshed with the at least two main chain sprockets 922 at two ends, the chain driving motor 94 is arranged at one end of the tool bracket 92 and is in driving connection with the adjacent main rotating shaft 921, the utility model does not limit the number of the chain driving motors, if the heating furnace body of the heating device is longer, so that the tool bracket can be provided with the chain driving motors at two ends of the tool bracket along with the longer heating furnace body, or a chain driving motor is additionally arranged in the middle of the tool bracket. The feed end turning bracket 95 and the discharge end turning bracket 96 are hinged on the main rotating shaft 921 at two end parts of the tooling bracket 92 through bearings, the end parts of the feed end turning bracket 95 and the discharge end turning bracket 96 adjacent to the tooling bracket 92 are respectively provided with a slave rotating shaft 951 arranged through bearings, at least two slave chain sprockets 952 and one slave chain sprocket 953 are respectively and correspondingly fixed on the two slave rotating shafts 951, the feed end turning bracket 95 and the discharge end turning bracket 96 are respectively provided with at least two sets of slave chains 954, the end parts of the slave rotating shafts 951 adjacent to the slave chains 954 are sleeved and meshed with the corresponding slave chain sprockets 952, certainly, the other end parts of the slave chains 954 are also sleeved and meshed with sprockets (not shown) arranged on the rotating shafts at the end parts of the feed end turning bracket 95 and the discharge end turning bracket 96, the two slave chain sprockets 953 on the slave rotating shafts 951 and the main chain sprockets 923 on the two main rotating shafts 921 are correspondingly interlocked through, one end of the turning drivers 97 is hinged to the two ends of the tooling bracket 92, usually to the bottom of the tooling bracket end, and the other end is hinged to the bottom of the feed end turning bracket 95 and the discharge end turning bracket 96, respectively, and the turning drivers 97 may be pneumatic or hydraulic cylinders.

The utility model discloses an efficiency is got to getting of work piece or the frock that carries the work piece is put in the improvement, all can be provided with the positioner (the picture does not mark) to the work piece or the frock that carries the work piece on the material fork and the frock bracket of feeder and ejection of compact machine, the utility model discloses do not injecing this positioner's structure, all can be applied to like the work piece positioner on the spare part production transportation line among the prior art the utility model discloses in order to carry out a position correction or revise to the work piece or the frock that carries the work piece, ensure the correctness of work piece or frock position.

The following describes the operation of the drag chain type stepping heating equipment in order to carry out the heat treatment process of the workpiece in the tool:

firstly, a material fork 75 of a feeder 71 is driven by a material fork lifting device and a material fork translation device to lift up a working surface higher than a drag chain 52, then an empty tool (a workpiece to be heat-treated is put into the empty tool) or a tool bearing the workpiece is transferred onto the material fork 75 of the feeder 71 by a tool feeding fork 82 of a tool feeding end lifting device or other devices except heating equipment, the tool is accurately positioned by a positioning device, then a front furnace door 2 of a heating furnace body 1 is opened, the material fork lifting device and the material fork translation device drive the material fork 75 to move towards the heating furnace body 1, after the material fork 75 moves in place, the material fork lifting device and the material fork translation device drive the material fork 75 to descend, the tool 12 is placed on the drag chain 52, and then the material fork 75 is driven to return to the original position and the front furnace door 2 is closed; the original position of the lifting device 6 in the furnace is at a descending position, the discharge end drag chain driving motor drives the drag chain 52 to move a stepping distance on the drag chain supporting slide rail 51 towards the rear furnace door 3 direction, the lifting device 6 in the furnace drives the supporting beam 63 to ascend to lift the tool 12 on the drag chain 52 to be separated from the drag chain 52, then the drag chain 52 moves a further distance towards the front furnace door 2 direction under the driving of the feed end drag chain driving motor to return to the original position, the lifting device 6 in the furnace descends to the original position to place the tool 12 on the drag chain 52, so that the workpiece loaded in the tool 12 is subjected to stepping heat treatment in the heating furnace body 1; when a supporting beam 63 of the in-furnace lifting device 6 positioned at the rear furnace door 3 rises to support the tool 12, a material fork 75 of the discharging machine 72 passes through an opening formed in the rear furnace door under the driving of the material fork lifting device and the material fork translation device (the discharging door is opened), the in-furnace lifting device 6 descends to place the tool 12 on the material fork 75 of the discharging machine 72, then the rear furnace door is opened, the material fork 75 of the discharging machine 72 returns to the original position under the driving of the material fork lifting device and the material fork translation device, the rear furnace door and the discharging door are closed, the taken-out tool 12 is positioned by a positioning device on the material fork 75 of the discharging machine 72, and then a workpiece is taken out of the tool by a taking device outside the heating equipment; the tooling lifting fork of the discharge end tooling lifting device clamps and holds up the empty tooling on the material fork 75 of the discharge machine 72, the empty tooling is lifted to the discharge end turning bracket 96 of the tooling returning and storing device 9 by the driving of the lifting driving device, the tooling lifting fork is rotated upwards and lifted to the proper position by the discharge end turning bracket 96, the tooling lifting fork is lowered to release the empty tooling on the discharge end turning bracket 96, the empty tooling is transferred to the main chain 93 on the tooling bracket 92 by the secondary chain 954 on the discharge end turning bracket 96 and is repositioned by the positioning device, the empty tooling is stored on the tooling bracket 92 or transferred to the feed end turning bracket 95, if the tooling needs are not stored, the empty tooling on the feed end turning bracket 95 is clamped and held up by the tooling lifting fork of the feed end tooling lifting device, then the feed end turning bracket 95 rotates downwards and returns to the original position, the tooling lifting fork of the feed end tooling lifting device is driven by the lifting driving device to descend, to place the empty tooling on the forks 75 of the feeder 71.

The utility model discloses a step-by-step firing equipment of tow chain formula can be returned with storage device's cooperation operation in order to realize the heat treatment process to the work piece or bear the work piece in the frock by artifical direct control heating furnace body, tow chain device, stove in elevating gear, feeder, ejection of compact machine, frock elevating gear and frock. In addition, the automatic operation of the drag chain type stepping heating equipment can be realized by configuring an electric control system, a closed loop servo for realizing accurate positioning control and various sensors. The utility model discloses the operation control mode to the step-by-step firing equipment of tow chain does not prescribe a limit to.

The utility model discloses a step-by-step action cycle of tow chain formula step-by-step firing equipment generally is 15 seconds, and the shortest action cycle can reach 10 seconds, and the stove internal dew point can be controlled at < -20 ℃, need not provide emergent stand-by power supply during the power failure, because the heating furnace body both sides do not have the roller stick device, therefore the stove outer covering surface heat loss of heating furnace body is little. Compare roller rod formula heating furnace and box heating furnace of main application among the prior art, the utility model discloses a step-by-step firing equipment of tow chain formula has: the heating device is suitable for heating workpieces in various shapes and needing to be loaded in the tool, the service life of the drag chain is long, more workpieces can be simultaneously subjected to heat treatment in the hearth, the operation energy consumption is low, the positioning accuracy of the workpieces is high, the maintenance cost is low, and the production efficiency is high.

It only does to go up the preferred embodiment of the utility model discloses a not be used for injecing the utility model discloses a patent range, other applications the utility model discloses an equivalent change that the patent idea was done all should belong to the patent protection scope of the utility model.

Claims

1. A drag chain type step heating apparatus comprising: a heating furnace body, the heating furnace body includes: the heating furnace comprises a heating furnace chamber, a heating device, a front furnace door and a rear furnace door, wherein the heating furnace chamber is formed in the heating furnace body, the heating device is arranged in the heating furnace chamber, and the front furnace door and the rear furnace door are respectively arranged on two opposite sides of the heating furnace body; it is characterized in that the heating furnace body further comprises: the heating furnace comprises a heating furnace chamber, a heating furnace body, a drag chain device and at least one group of in-furnace lifting devices, wherein the drag chain device is positioned in the heating furnace chamber and is fixedly arranged on a bottom plate of the heating furnace body; and the at least one workpiece which is sent into the heating furnace chamber and is placed on a drag chain of the drag chain device is lifted, supported and lowered by the at least one group of in-furnace lifting devices so as to match the drag chain of the drag chain device to move back and forth to heat the at least one workpiece.

2. The drag chain type step heating apparatus according to claim 1, wherein the drag chain device comprises: the heating furnace comprises at least one group of drag chain supporting slide rails, at least one group of drag chains and at least one drag chain driving motor, wherein the at least one group of drag chain supporting slide rails are fixedly arranged on a bottom plate of the heating furnace body, two ends of the at least one group of drag chain supporting slide rails are respectively positioned at a front furnace door and a rear furnace door, the at least one group of drag chains are correspondingly embedded on the at least one group of drag chain supporting slide rails, and the at least one drag chain driving motor is arranged outside the heating furnace body and is connected with and drives the at least one group of drag chains to slide on the at least one group of drag chain supporting slide rails to move back.

3. The towline type stepping heating device according to claim 2, wherein each group of towline supporting slide rails comprises at least two towline supporting slide rails, a rail groove is formed in the upper portion of each towline supporting slide rail, each group of towlines comprises at least two towlines, the towlines are correspondingly embedded in the rail grooves, the number of the towline driving motors is two, the towline driving motors are divided into a feeding end towline driving motor and a discharging end towline driving motor, the feeding end towline driving motors are respectively arranged on the outer side of the front furnace door and the outer side of the rear furnace door, the feeding end towline driving motors are connected and drive the feeding ends of the towlines, the discharging end towline driving motors are connected and drive the discharging ends of the towlines, and the towline driving motors and the discharging end towline driving motors alternately run for a further time at intervals to enable the towlines to travel for a further distance back and forth.

4. The towline type step heating apparatus according to claim 3, wherein the towline device further comprises a plurality of chains, two towline tensioning devices, a plurality of sprockets and two transmission shafts, the feeding end or the discharging end of the towline extends outward by an extension distance not less than the step distance, one end of the plurality of chains is respectively and correspondingly connected to the feeding end and the discharging end of the towline, the other end of the plurality of chains is respectively and correspondingly connected to the two towline tensioning devices disposed outside the front furnace door and the rear furnace door, the plurality of sprockets are respectively fixed to the two transmission shafts, the two transmission shafts are respectively connected to the output end of the feeding end towline driving motor and the output end of the discharging end towline driving motor, the plurality of sprockets are correspondingly engaged with the plurality of chains, and the towline driving motor and the discharging end towline driving motor alternately operate for the step time at intervals, so as to drive the chain wheel to drive the chain to make the drag chain travel the stepping distance back and forth.

5. The towline step heater apparatus of claim 4, wherein said towline means further comprises a plurality of towline lubricants, said plurality of towline lubricants being uniformly disposed within said rail groove.

6. The drag chain type stepping heating apparatus according to claim 1, wherein each set of in-furnace elevating means comprises an elevating driving motor, an elevating structure member, a plurality of elevating columns and a plurality of support beams, the lifting driving motor is arranged outside the heating furnace body, the lifting structural part is arranged at the lower part outside the heating furnace body, the plurality of lifting columns are symmetrically arranged at the upper part of the lifting structural part, and the upper ends of the plurality of lifting columns penetrate through the bottom of the heating furnace body and extend into the heating furnace chamber and are positioned at two sides of a drag chain supporting slide rail of the drag chain device, the supporting beams are parallel to the drag chain supporting slide rail and are respectively and fixedly arranged at the upper end parts of the lifting columns, the lifting driving motor drives the lifting structural part to horizontally ascend or descend, so that the plurality of supporting beams are driven to be higher or lower than the drag chain supporting slide rail.

7. The towline type stepping heating device according to claim 1, further comprising a feeder and a discharger, wherein the feeder and the discharger are respectively disposed outside the front furnace door and the rear furnace door, the feeder and the discharger each comprise a frame, a fork arm, a fork lifting device and a fork translation device, the fork arm, the fork lifting device and the fork translation device are all disposed on the frame, the fork is horizontally disposed on the fork arm, the fork lifting device can drive the fork arm to drive the fork to ascend or descend, and the fork translation device can drive the fork arm to drive the fork to horizontally move forward, backward, leftward and rightward.

8. The drag chain type stepping heating device of claim 7, further comprising a tool lifting device and at least one tool returning and storing device; the tool lifting device comprises four stand columns, a discharge end tool lifting device and a feed end tool lifting device, the four stand columns are respectively and vertically fixedly arranged on two sides outside the front furnace door and two sides outside the rear furnace door, and the discharge end tool lifting device and the feed end tool lifting device are respectively arranged on two stand columns outside the rear furnace door and two stand columns outside the front furnace door; the tool returning and storing device is located above the heating furnace body and fixedly arranged on the four stand columns from bottom to top in sequence, and the tool returning and storing device receives the tools conveyed by the discharge end tool lifting device to store the tools or convey the tools to the feed end tool lifting device.

9. The drag chain type stepping heating equipment as claimed in claim 8, wherein the discharge end tooling lifting device and the feed end tooling lifting device have the same structure and are both composed of a pair of tooling lifting material forks, the tooling lifting material fork comprises a lifting driving device, a lifting material fork arm, a tooling material fork and a material fork telescopic driving device, the lifting driving device is arranged on the lifting material fork arm, one end of the lifting material fork arm is arranged on the upright post, the lifting material fork arm is driven by the lifting driving device to move up and down along the upright post, the other end of the lifting material fork arm is provided with the work material fork and the material fork telescopic driving device, two of the material discharge end tool lifting device and the material feed end tool lifting device are oppositely arranged and driven by the material fork telescopic driving device to clamp or release the tool.

10. The drag chain type stepping heating device according to claim 8, wherein the tool returning and storing device comprises a tool bracket, at least two sets of main chains, a chain driving motor, a feeding end overturning bracket, a discharging end overturning bracket and a plurality of overturning drivers, the tool bracket is horizontally and fixedly arranged on the four upright posts, two ends of the tool bracket are respectively provided with a main rotating shaft arranged through a bearing, at least two main chain sprockets and one main sprocket are respectively and correspondingly fixed on the two main rotating shafts, the at least two sets of main chains are arranged on the tool bracket, two ends of the at least two sets of main chains are sleeved and meshed with the at least two main chain sprockets, the chain driving motor is arranged at one end of the tool bracket and is in driving connection with the adjacent main rotating shaft, the feeding end overturning bracket and the discharging end overturning bracket are hinged on the main rotating shafts at two ends of the tool bracket through bearings, the end parts of the feeding end overturning bracket and the discharging end overturning bracket, which are adjacent to the tool bracket, are respectively provided with a slave rotating shaft arranged through a bearing, two slave chain sprockets and a slave chain wheel are respectively and correspondingly fixed on the slave rotating shaft, the feeding end overturning bracket and the discharging end overturning bracket are respectively provided with at least two sets of slave chains, and are sleeved on the end parts of the adjacent slave rotating shafts of the slave chains and meshed with the corresponding slave chain sprockets, two slave rotating shafts are provided with two sets of drive chains through sleeves, so as to be correspondingly linked, one ends of a plurality of overturning drivers are respectively hinged at two end parts of the tool bracket, and the other ends of the plurality of overturning drivers are respectively hinged at the bottoms of the feeding end overturning bracket and the discharging end overturning bracket.