CN207828377U - One kind being used for crankshaft-synchronous heat-treating apparatus - Google Patents
One kind being used for crankshaft-synchronous heat-treating apparatus Download PDFInfo
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- CN207828377U CN207828377U CN201820075298.6U CN201820075298U CN207828377U CN 207828377 U CN207828377 U CN 207828377U CN 201820075298 U CN201820075298 U CN 201820075298U CN 207828377 U CN207828377 U CN 207828377U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The utility model discloses one kind being used for crankshaft-synchronous heat-treating apparatus, including positioning and clamping mechanism, synchronous drive mechanism, parallelogram mechanism and sensing heating mechanism；The positioning and clamping mechanism is used to position the bent axle of production and clamp；The synchronous drive mechanism is for driving parallelogram mechanism and crankshaft-synchronous to rotate；The parallelogram mechanism is for driving sensing heating mechanism to be translatable in the horizontal plane；The sensing heating mechanism is for heating bent axle and being kept the temperature heat treatment.The device in heat treatment, place vertically by bent axle, and heat treatment position is heated evenly, it is small to deform, and heat treatment efficiency is high, adapts to the burning optimization on line of multi items bent axle.
Description
Technical field
The utility model belongs to metal surface technical field of heat treatment, is related to automobile crane annealing device, and in particular to
One kind being used for crankshaft-synchronous heat-treating apparatus.
Background technology
Bent axle is the important composition component of automobile engine, at its quality of production, particularly crankshaft journal and fillet
Stress concentration, fatigue crack or fracture influence the service life of engine and comprehensive performance very big.In order to eliminate such influence,
Usually bent axle is heat-treated in process of production.
Crankshaft journal and fillet heat treatment mainly have is heat-treated two ways under online production heat treatment and line：With regard to current
Speech, during online production be heat-treated, bent axle is horizontal positioned, and centre is needed back in heat treatment process without Auxiliary support
Burning hot straightening technology, heat is transmitted and bent axle dead weight can increase crankshaft deformation；Stacking, tiling or outstanding is usually taken in heat treatment under line
The concentration heat treatment mode of extension, needs special heat-treatment production line, cannot be matched with crankshaft production line, bent when heat treatment
Axis is stationary, and there is heat the shortcomings such as uneven, deformation is big, heat treatment is costly, productive temp is slow.
Utility model content
For the above-mentioned problems in the prior art, the utility model provide it is a kind of for crankshaft-synchronous heat treatment
Device, the device in heat treatment, place vertically by bent axle, and heat treatment position is heated evenly, deforms small, heat treatment efficiency height, energy
Adapt to the burning optimization on line of multi items bent axle.
For this purpose, the utility model uses following technical scheme：
One kind being used for crankshaft-synchronous heat-treating apparatus, including positioning and clamping mechanism, synchronous drive mechanism, parallelogram
Mechanism and sensing heating mechanism；The positioning and clamping mechanism is used to position the bent axle of production and clamp；The synchronous drive mechanism
For driving parallelogram mechanism and crankshaft-synchronous to rotate；The parallelogram mechanism is for driving sensing heating mechanism to exist
Translation in horizontal plane；The sensing heating mechanism is for heating bent axle and being kept the temperature heat treatment.
Further, the positioning and clamping mechanism includes pneumatic scroll chuck, positioning plate, eccentric top, side plate and activity
It is top；The rolling center is fixedly connected on the top of side plate, and the positioning plate is connected with pneumatic scroll chuck, described inclined
The heart is top to be fixedly connected with positioning plate；The rolling center is located at the surface of positioning plate, therebetween for placing bent axle；Institute
It states bent axle to clamp by pneumatic scroll chuck, and by positioning plate, rolling center, pneumatic scroll chuck and eccentric top positioning.
Further, the synchronous drive mechanism includes driven synchronous pulley, the first transmission shaft, second driving shaft, active
Synchronous pulley, third transmission shaft, bearing block, the second synchronous belt, lower bottom base, driving motor, upper bed-plate, first bevel gear and second
Bevel gear；The output shaft of the driving motor is mounted on bearing block, and the bearing block is connected with lower bottom base；The transmission electricity
The right end of machine output shaft is connected by nut and flat key with first bevel gear；The first bevel gear and second bevel gear phase
Mutually engagement；The second bevel gear is connected by nut and flat key with third transmission shaft；The second driving shaft lower end is logical
It crosses nut and flat key is connected with active synchronization belt wheel；The active synchronization belt wheel drives driven synchronization by the second synchronous belt
Belt wheel rotates；The driven synchronous pulley is connected by nut and flat key with the first transmission shaft；The upper bed-plate and bottom
Seat is connected；The upper bed-plate is located at the upper surface of lower bottom base, successively opens three holes, first transmission shaft, from left to right
Two transmission shafts, third transmission shaft are inserted into respectively in three holes of upper bed-plate.
Further, the pneumatic scroll chuck is connected by thrust ball bearing and flat key with the first transmission shaft；Institute
Driving motor is stated with side plate to be connected；The side plate is vertically fixed on upper bed-plate and lower bottom base.
Further, the parallelogram mechanism include the first synchronous belt, driving crank, first manual scroll chuck,
Driving crank and the second manual scroll chuck；The first manual scroll chuck is passed by thrust ball bearing and flat key and second
Moving axis is connected, and the driving crank is inserted into the hole of first manual scroll chuck；The second manual scroll chuck is by pushing away
Power ball bearing and flat key are connected with third transmission shaft, and the driving crank is inserted into the hole of the second manual scroll chuck；Institute
It is corresponding with pending bent axle to state the position of trunnion and connecting rod neck in driving crank and driving crank；The first manual
The lower end of scroll chuck and the second manual scroll chuck is machined with tooth form, and the second manual scroll chuck is driven by the first synchronous belt
First manual scroll chuck rotates.
Further, the sensing heating mechanism include high temperature resistant heat insulation material, telescopic cylinder, shaft, bowl cover, it is U-shaped circle,
Wired hose, nozzle, induction heater and non-contact temperature sensor；The shaft is connected the Kong Yuzhu of composition with bowl cover
Dynamic crank journal (connecting rod neck or trunnion) matches, and axle journal corresponding with driving crank passes through on shaft in driving crank
Opening is inserted into the slot of shaft, and the opening on shaft intersects reversed arrangement；The telescopic cylinder right end is connected with shaft, left end
Piston rod is connected with U-shaped circle；The nozzle is threadedly coupled with U-shaped circle, and wired hose is inserted into retractable air cylinder piston bar and nozzle
Hole in, couple with nozzle threads；Induction heater is connected with U-shaped circle, and non-contact temperature sensor screws in U-shaped circle and sense
In the hole for answering heater, it is threadedly coupled with U-shaped circle；The high temperature resistant heat insulation material is located on U-shaped circle, for thermal treatment zone
It is kept the temperature.
As a preferred embodiment, adding equipped with 3~15 sensing heating mechanisms, the induction on the parallelogram mechanism
Heat engine structure is distributed along the axial direction of bent axle, and the quantity of distribution and position are determined according to the heating position of bent axle.
Compared with prior art, the utility model has the beneficial effects that：
(1) heat treatment efficiency is high.It, can be simultaneously equipped with 3~15 sensing heating mechanisms on parallelogram mechanism
Multiple crankshaft journals (trunnion or connecting rod neck) are heat-treated parallel.
(2) position is heated evenly, thermal effectiveness is good, deformation is small for heat treatment.During heat treatment, bent axle is put vertically
It sets, and bent axle is heated in rotation；Parallelogram mechanism driving sensing heating mechanism is translatable in the horizontal plane, it is ensured that sense
It answers heater and crankshaft journal relative position constant, and do not contacted with bent axle, ensure that the temperature of heating surface is constant.
(3) heat treatment is flexible, is adapted to the burning optimization on line of multi items bent axle.Due to the quantity of sensing heating mechanism
It can be adjusted according to the heating position of bent axle and needs with distributing position, therefore heated perimeter is wide, can adapt to multi items
The burning optimization on line of bent axle.
(4) at low cost.The annealing device is matched with crankshaft production line, does not need special heat-treatment production line.
Description of the drawings
Fig. 1 is a kind of front view (A-A sectional views) for crankshaft-synchronous annealing device provided by the utility model.
Fig. 2 is a kind of vertical view for crankshaft-synchronous annealing device provided by the utility model.
Fig. 3 is a kind of left view for crankshaft-synchronous annealing device provided by the utility model.
Fig. 4 is a kind of B-B sectional views for crankshaft-synchronous annealing device provided by the utility model.
Fig. 5 is a kind of three regarding for sensing heating mechanism in crankshaft-synchronous annealing device provided by the utility model
Figure.
Reference sign：1, driven synchronous pulley；2, the first transmission shaft；3, pneumatic scroll chuck；4, positioning plate；5,
Two transmission shafts；6, active synchronization belt wheel；7, the first synchronous belt；8, third transmission shaft；9, bearing block；10, the second synchronous belt；11、
It is eccentric top；12, driving crank；13, first manual scroll chuck；14, driving crank；15, the second manual scroll chuck；16、
Side plate；17, rolling center；18, lower bottom base；19, driving motor；20, upper bed-plate；21, first bevel gear；22, second bevel gear；
23, high temperature resistant heat insulation material；24, telescopic cylinder；25, shaft；26, bowl cover；27, U-shaped circle；28, wired hose；29, nozzle；
30, induction heater；31, non-contact temperature sensor.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment is described in detail the utility model, specific embodiment therein and says
It is bright to be only used for explaining the utility model, but be not intended to limit the scope of the present invention.
The utility model discloses one kind being used for crankshaft-synchronous heat-treating apparatus, including positioning and clamping mechanism, synchronous biography
Motivation structure, parallelogram mechanism and sensing heating mechanism；The positioning and clamping mechanism is used to position the bent axle of production and clamp；
The synchronous drive mechanism is for driving parallelogram mechanism and crankshaft-synchronous to rotate；The parallelogram mechanism is for driving
Innervation answers heating mechanism to be translatable in the horizontal plane；The sensing heating mechanism is for heating bent axle and being kept the temperature heat treatment.
As shown in figures 1 and 3, the positioning and clamping mechanism include pneumatic scroll chuck 3, positioning plate 4, it is eccentric top 11,
Side plate 16 and rolling center 17；The rolling center 17 is fixedly connected on the top of side plate 16, the positioning plate 4 and pneumatic three
Dog chuck 3 is connected, and the bias top 11 is fixedly connected with positioning plate 4；The rolling center 17 be located at positioning plate 4 just on
Side, therebetween for placing bent axle；The bent axle by pneumatic scroll chuck 3 clamp, and by positioning plate 4, rolling center 17,
Pneumatic scroll chuck 3 and eccentric top 11 positioning.
Shown in as shown in Figure 1, Figure 3 and Figure 4, the synchronous drive mechanism includes driven synchronous pulley 1, the first transmission shaft 2, second
Transmission shaft 5, active synchronization belt wheel 6, third transmission shaft 8, bearing block 9, the second synchronous belt 10, lower bottom base 18, driving motor 19, on
Pedestal 20, first bevel gear 21 and second bevel gear 22；The output shaft of the driving motor 19 is mounted on bearing block 9, described
Bearing block 9 is connected with lower bottom base 18；The right end of 19 output shaft of the driving motor passes through nut and flat key and the first cone tooth
Wheel 21 is connected；The first bevel gear 21 is intermeshed with second bevel gear 22；The second bevel gear 22 by nut with
And flat key is connected with third transmission shaft 8；5 lower end of the second driving shaft passes through nut and flat key and active synchronization belt wheel 6
It is connected；The active synchronization belt wheel 6 drives driven synchronous pulley 1 to rotate by the second synchronous belt 10；The driven synchronous belt
Wheel 1 is connected by nut and flat key with the first transmission shaft 2；The upper bed-plate 20 is connected with lower bottom base 18；The upper bottom
Seat is located at the upper surface of lower bottom base 18, successively opens three holes, first transmission shaft 2, second driving shaft 5, third from left to right
Transmission shaft 8 is inserted into three holes of upper bed-plate 20 respectively.
The pneumatic scroll chuck 3 is connected by thrust ball bearing and flat key with the first transmission shaft 2；The transmission electricity
Machine 19 is connected with side plate 16；The side plate 16 is vertically fixed on upper bed-plate 20 and lower bottom base 18.
As depicted in figs. 1 and 2, the parallelogram mechanism includes the first synchronous belt 7, driving crank 12, first manual
Scroll chuck 13, driving crank 14 and the second manual scroll chuck 15；The first manual scroll chuck 13 passes through thrust ball axis
It holds and flat key is connected with second driving shaft 5, the driving crank 12 is inserted into the hole of first manual scroll chuck 13；It is described
Second manual scroll chuck 15 is connected by thrust ball bearing and flat key with third transmission shaft 8, and the driving crank 14 is inserted
In the hole for entering the second manual scroll chuck 15；The cloth set of trunnion and connecting rod neck in the driving crank 14 and driving crank 12
It sets corresponding with pending bent axle；The lower end processing of 13 and second manual scroll chuck 15 of the first manual scroll chuck is with teeth
Shape, the second manual scroll chuck 15 drive first manual scroll chuck 13 to rotate by the first synchronous belt 7.
As shown in figure 5, the sensing heating mechanism includes high temperature resistant heat insulation material 23, telescopic cylinder 24, shaft 25, bowl cover
26, U-shaped circle 27, wired hose 28, nozzle 29, induction heater 30 and non-contact temperature sensor 31；25 He of the shaft
The be connected hole of composition of bowl cover 26 is matched with 14 axle journal of driving crank (connecting rod neck or trunnion), in driving crank 12 with actively
14 corresponding axle journal of crank is inserted by the opening on shaft 25 in the slot of shaft 25, and the opening on shaft 25 intersects reversed cloth
It sets；24 right end of the telescopic cylinder is connected with shaft 25, and left end piston rod is connected with U-shaped circle 27；The nozzle 29 with it is U-shaped
Circle 27 is threadedly coupled, and wired hose 28 is inserted into the hole of 24 piston rod of telescopic cylinder and nozzle 29, with 29 thread connection of nozzle；Sense
Heater 30 is answered to be connected with U-shaped circle 27, non-contact temperature sensor 31 screws in the hole of U-shaped circle 27 and induction heater 30
In, it is threadedly coupled with U-shaped circle 27；The high temperature resistant heat insulation material 23 is located on U-shaped circle 27, for being protected to thermal treatment zone
Temperature.
Equipped with 3~15 sensing heating mechanisms on the parallelogram mechanism, the sensing heating mechanism is along bent axle
Axial distribution, the quantity of distribution and position are determined according to the heating position of bent axle.
Embodiment
A kind of workflow for online production crankshaft-synchronous annealing device provided by the utility model is as follows：
Bent axle positions bent axle by positioning and clamping mechanism and clamps, parallel four are driven by synchronous drive mechanism in heat treatment
Bian Xing mechanisms and crankshaft-synchronous rotation, by parallelogram mechanism driving sensing heating, mechanism is translatable in the horizontal plane, ensures sense
It answers heater and crankshaft journal relative position constant, and do not contacted with crankshaft journal, prevents from scratching crankshaft journal, by sensing heating
Mechanism heats bent axle and is kept the temperature heat treatment.Detailed process includes：
Positioning and clamping mechanism realizes that the positioning of bent axle clamps：Bent axle is mainly by positioning plate 4, rolling center 17, pneumatic three-jaw
Chuck 3 and eccentric top 11 positioning, limit the six-freedom degree of bent axle, bent axle is clamped by pneumatic scroll chuck 3 altogether.
When synchronous drive mechanism works, the route of movement and power transmission is：19 → first bevel gear of driving motor 21 →
22 → third of second bevel gear transmission shaft, 8 → the second manual scroll chuck, 15 → the first synchronous belt 7 → first manual scroll chuck
13 → second driving shaft, 5 → active synchronization belt wheel, 6 → the second synchronous belt 10 → driven 1 → the first transmission shaft 2 of synchronous pulley, outward
Export synchronous rotational speed.
The positioning and clamping of parallelogram mechanism is similar with bent axle, and first manual scroll chuck 13 passes through thrust ball bearing
And flat key is connected with second driving shaft 5, driving crank 12 is inserted into the hole of first manual scroll chuck 13, by first manual
Scroll chuck 13, positioning plate, rolling center and eccentric top positioning clamp；Second manual scroll chuck 15 passes through thrust ball axis
It holds and flat key is connected with third transmission shaft 8, driving crank 14 is inserted into the hole of the second manual scroll chuck 15, by second-hand
Dynamic scroll chuck 15, positioning plate, rolling center and eccentric top positioning clamp；First manual scroll chuck 13 and second is manually
Scroll chuck 15 is driven by the first synchronous belt 7.
When sensing heating mechanism works, by first manual scroll chuck 13, the second manual scroll chuck 15, driving crank 14
The parallelogram mechanism driving formed with driving crank 12, realizes translation, is heat-treated to crankshaft parallel in the horizontal plane.At heat
Before reason, telescopic cylinder 24 drives induction heater 30 to move at crankshaft journal；It is right by induction heater 30 in heat treatment process
Crankshaft journal and fillet heating, detect bent axle heat treatment temperature, when heat treatment temperature reaches by non-contact temperature sensor 31
When setting value, nozzle 29 spray water, crankshaft journal and fillet are cooled down, by high temperature resistant heat insulation material 23 to thermal treatment zone into
Row heat preservation.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Any modification, equivalent replacement and improvement etc., should be included in this reality made by within the spirit and spirit of utility model
Within novel protection domain.
Claims (3)
1. one kind being used for crankshaft-synchronous heat-treating apparatus, including positioning and clamping mechanism, synchronous drive mechanism, parallelogram machine
Structure and sensing heating mechanism, it is characterised in that：The positioning and clamping mechanism is used to position the bent axle of production and clamp；The synchronization
Transmission mechanism is for driving parallelogram mechanism and crankshaft-synchronous to rotate；The parallelogram mechanism is for driving induction to add
Heat engine structure is translatable in the horizontal plane；The sensing heating mechanism is for heating bent axle and being kept the temperature heat treatment；
The positioning and clamping mechanism includes pneumatic scroll chuck (3), positioning plate (4), eccentric top (11), side plate (16) and activity
Top (17)；The rolling center (17) is fixedly connected on the top of side plate (16), the positioning plate (4) and pneumatic three-jaw card
Disk (3) is connected, and the bias top (11) is fixedly connected with positioning plate (4)；The rolling center (17) is located at positioning plate (4)
Surface, therebetween for placing bent axle；The bent axle by pneumatic scroll chuck (3) clamp, and by positioning plate (4),
Rolling center (17), pneumatic scroll chuck (3) and bias top (11) positioning；
The synchronous drive mechanism includes driven synchronous pulley (1), the first transmission shaft (2), second driving shaft (5), active synchronization
Belt wheel (6), third transmission shaft (8), bearing block (9), the second synchronous belt (10), lower bottom base (18), driving motor (19), upper bed-plate
(20), first bevel gear (21) and second bevel gear (22)；The output shaft of the driving motor (19) is mounted on bearing block (9)
On, the bearing block (9) is connected with lower bottom base (18)；The right end of driving motor (19) output shaft is by nut and puts down
Key is connected with first bevel gear (21)；The first bevel gear (21) is intermeshed with second bevel gear (22)；Described second
Bevel gear (22) is connected by nut and flat key with third transmission shaft (8)；Second driving shaft (5) lower end passes through nut
And flat key is connected with active synchronization belt wheel (6)；The active synchronization belt wheel (6) is driven driven by the second synchronous belt (10)
Synchronous pulley (1) rotates；The driven synchronous pulley (1) is connected by nut and flat key with the first transmission shaft (2)；It is described
Upper bed-plate (20) is connected with lower bottom base (18)；The upper bed-plate is located at the upper surface of lower bottom base (18), successively opens from left to right
Three holes, first transmission shaft (2), second driving shaft (5), third transmission shaft (8) are inserted into three of upper bed-plate (20) respectively
Kong Zhong；
The parallelogram mechanism includes the first synchronous belt (7), driving crank (12), first manual scroll chuck (13), master
Dynamic crank (14) and the second manual scroll chuck (15)；The first manual scroll chuck (13) is by thrust ball bearing and puts down
Key is connected with second driving shaft (5), and the driving crank (12) is inserted into the hole of first manual scroll chuck (13)；Described
Two manual scroll chucks (15) are connected by thrust ball bearing and flat key with third transmission shaft (8), the driving crank
(14) it is inserted into the hole of the second manual scroll chuck (15)；Trunnion and company in the driving crank (14) and driving crank (12)
The position of bar neck is corresponding with pending bent axle；The first manual scroll chuck (13) and the second manual scroll chuck
(15) lower end is machined with tooth form, and the second manual scroll chuck (15) drives first manual three-jaw card by the first synchronous belt (7)
Disk (13) rotates；
The sensing heating mechanism includes high temperature resistant heat insulation material (23), telescopic cylinder (24), shaft (25), bowl cover (26), U-shaped
Enclose (27), wired hose (28), nozzle (29), induction heater (30) and non-contact temperature sensor (31)；The shaft
(25) matched with driving crank (14) axle journal with the be connected hole of composition of bowl cover (26), in driving crank (12) with driving crank
(14) corresponding axle journal is inserted by the opening on shaft (25) in the slot of shaft (25), and the opening on shaft (25) is intersected anti-
To arrangement；Telescopic cylinder (24) right end is connected with shaft (25), and left end piston rod is connected with U-shaped circle (27)；It is described
Nozzle (29) is threadedly coupled with U-shaped circle (27), and wired hose (28) is inserted into the hole of telescopic cylinder (24) piston rod and nozzle (29)
In, with nozzle (29) thread connection；Induction heater (30) is connected with U-shaped circle (27), non-contact temperature sensor (31)
It screws in the hole of U-shaped circle (27) and induction heater (30), is threadedly coupled with U-shaped circle (27)；The high temperature resistant heat insulation material
(23) it is located on U-shaped circle (27), for being kept the temperature to thermal treatment zone.
2. according to claim 1 a kind of for crankshaft-synchronous heat-treating apparatus, it is characterised in that：The pneumatic three-jaw
Chuck (3) is connected by thrust ball bearing and flat key with the first transmission shaft (2)；The driving motor (19) and side plate (16)
It is connected；The side plate (16) is vertically fixed on upper bed-plate (20) and lower bottom base (18).
3. according to claim 1 or 2 a kind of for crankshaft-synchronous heat-treating apparatus, it is characterised in that：It is described parallel
It is distributed along the axial direction of bent axle equipped with 3~15 sensing heating mechanisms, the sensing heating mechanism on quadrangular mechanism, distribution
Quantity and position are determined according to the heating position of bent axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820075298.6U CN207828377U (en) | 2018-01-17 | 2018-01-17 | One kind being used for crankshaft-synchronous heat-treating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820075298.6U CN207828377U (en) | 2018-01-17 | 2018-01-17 | One kind being used for crankshaft-synchronous heat-treating apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN207828377U true CN207828377U (en) | 2018-09-07 |
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ID=63393365
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820075298.6U Active CN207828377U (en) | 2018-01-17 | 2018-01-17 | One kind being used for crankshaft-synchronous heat-treating apparatus |
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| CN (1) | CN207828377U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034799A (en) * | 2018-01-17 | 2018-05-15 | 湖北汽车工业学院 | A kind of online production crankshaft-synchronous annealing device |
-
2018
- 2018-01-17 CN CN201820075298.6U patent/CN207828377U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034799A (en) * | 2018-01-17 | 2018-05-15 | 湖北汽车工业学院 | A kind of online production crankshaft-synchronous annealing device |
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