阅读说明：本技术 一种钢结构焊后热处理装置 (Steel construction postweld heat treatment device ) 是由 张成林 谭涵 于 2021-07-22 设计创作，主要内容包括：本发明公开了一种钢结构焊后热处理装置,包括底座,所述第二电动伸缩杆的一端活动连接有抵紧转动装置,所述抵紧转动装置的一端对称连接有两个固定伸缩装置,所述工件的外表面活动连接有加热器,所述加热器的外表面活动连接有保温棉；本发明通过设置抵紧转动装置,通过开设移动槽可以使得此装置对不同大小的工件进行固定,提高了此装置的通用性,通过电动机、转轴的相互配合下可以使得工件进行转动,以适应其它热处理方式,因此通过设置抵紧转动装置不仅可以对钢结构进行焊后热处理,还能对其进行焊前热处理和焊接处理,从而不用再对工件进行移动,提高了整体焊接工作的工作效率。(The invention discloses a post-welding heat treatment device for a steel structure, which comprises a base, wherein one end of a second electric telescopic rod is movably connected with a propping rotating device, one end of the propping rotating device is symmetrically connected with two fixed telescopic devices, the outer surface of a workpiece is movably connected with a heater, and the outer surface of the heater is movably connected with heat insulation cotton; the invention can fix workpieces with different sizes by arranging the abutting rotating device and arranging the moving groove, thereby improving the universality of the device, and the workpieces can rotate under the mutual matching of the motor and the rotating shaft so as to adapt to other heat treatment modes.)

1. The utility model provides a steel construction postweld heat treatment device, includes base (1), its characterized in that: the edge position of the upper surface of the base (1) is fixedly connected with a supporting plate (2), the central position of the upper surface of the base (1) is fixedly connected with a second electric telescopic rod (3), one end of the second electric telescopic rod (3) is movably connected with a tight-resisting rotating device (4), one end of the tight-resisting rotating device (4) is symmetrically connected with two fixed telescopic devices (5), one end of the tight-resisting rotating device (4) is fixedly connected with a workpiece (6), the outer surface of the workpiece (6) is movably connected with a heater (7), and the outer surface of the heater (7) is movably connected with heat-insulating cotton (8);

the tightening rotating device (4) comprises a motor (41), a rotating shaft (42), a rotating plate (43), a moving groove (44), a moving block (45) and a bolt (46); the supporting plate is characterized in that an electric motor (41) is fixedly connected to one end of the supporting plate (2), a rotating shaft (42) is fixedly connected to the output end of the electric motor (41), a rotating plate (43) is fixedly connected to one end of the rotating shaft (42), two moving grooves (44) are symmetrically formed in one side of the side surface of one end of the rotating plate (43), a moving block (45) is movably connected to the groove position of the side surface of one end of the rotating plate (43), and two bolts (46) are symmetrically arranged inside the moving block (45).

2. The post-weld heat treatment device for the steel structure according to claim 1, characterized in that: the fixed telescopic device (5) comprises a first electric telescopic rod (51), a spring (52), an electromagnet (53) and a telescopic rod (54); one end of the abutting rotating device (4) is symmetrically connected with two first electric telescopic rods (51), the outer circular surface of one end of each first electric telescopic rod (51) is fixedly connected with a spring (52), an expansion rod (54) is arranged inside each spring (52), and one end of each spring (52) is fixedly connected with an electromagnet (53).

3. The post-weld heat treatment device for the steel structure according to claim 2, characterized in that: the electromagnet (53) is in a right-angle plate shape.

4. The post-weld heat treatment device for the steel structure according to claim 1, characterized in that: the four corners of the lower surface of the base (1) are fixedly connected with pulleys (9).

5. The post-weld heat treatment device for the steel structure according to claim 1, characterized in that: the center of the upper surface of the base (1) is fixedly connected with a second electric telescopic rod (3).

6. The post-weld heat treatment device for the steel structure according to claim 1, characterized in that: and a ball bearing is arranged at the connecting position of the rotating shaft (42) and the second electric telescopic rod (3).

7. The post-weld heat treatment device for the steel structure according to claim 1, characterized by comprising an air bag (10), wherein the air bag (10) is arranged on the side edge of the workpiece (6) and is in contact with the workpiece (6), liquid is arranged in the air bag (10), the air bag (10) is connected with a first air pipe (11) through a pipeline, the first air pipe (11) is communicated with a first air cylinder (12), the first air cylinder (12) is arranged in the spring (52), one end of the first air cylinder (12) is fixedly connected with the electromagnet (53), and the other end of the first air cylinder is connected with the fixed telescopic device (5).

8. The steel structure heat treatment device according to claim 7, characterized by comprising a pressure guide column (13) which is arranged in the first air pipe (11), can slide in the first air pipe (11) and is in sealing contact with the first air pipe (11), the first air pipe (11) is arranged at the position of the pressure guide column (13) in a transparent mode, and the pressure guide column (13) can slide back and forth at the position of the pipeline in the transparent mode to indicate the pressure of the air bag (10).

9. The post-weld heat treatment device for the steel structure according to claim 1, wherein the electromagnet (53) is connected with a second spring (14), the second spring (14) is connected with a limiting plate (15), and the limiting plate (15) is connected with the airbag (10).

10. The post weld heat treatment apparatus for steel structures according to claim 9, wherein the liquid in the bladder (10) is alcohol.

Technical Field

The invention relates to the technical field of postweld heat treatment, in particular to a postweld heat treatment device for a steel structure.

Background

The welding residual stress is caused by uneven temperature distribution of a weldment due to welding, expansion and contraction of weld metal due to heat, and the like, and therefore the residual stress is inevitably generated along with welding construction. The most common method for eliminating residual stress is high-temperature tempering, namely, a weldment is placed in a heat treatment furnace to be heated to a certain temperature (below Ac 1) and kept for a certain time, plastic flow is generated at a place with high internal stress by utilizing the reduction of the yield limit of a material at high temperature, the elastic deformation is gradually reduced, and the plastic deformation is gradually increased to reduce the stress. The effect of post-weld heat treatment on the tensile strength and creep limit of metals is related to the temperature and holding time of the heat treatment. The impact of post-weld heat treatment on weld metal impact toughness varies with steel type.

In the process of implementing the invention, the inventor finds that at least the following problems in the prior art are not solved: 1. the prior art is when using, fixes the work piece through the mode of local support or cushion, because fixed not tight, often causes to bind difficulty and heat treatment effect influenced because the work piece rocks easily at the during operation, simultaneously because the work piece all need remove the work piece before welding heat treatment, postweld heat treatment and welding process, not only troublesome but also consuming time.

2. When the heat treatment device is used in the prior art, the heater and the heat insulation cotton are fixed in a sticking mode or a fixture fixing mode, the heat treatment heater and the heat insulation cotton fall off due to the fact that the fixing effect is poor and the heat treatment quality is affected, the heat treatment heater and the heat insulation cotton are difficult to fix in a local steel structure, and the heat treatment heater and the heat insulation cotton fall down due to the factors of gravity and electrified thermal expansion and cannot be tightly attached to a welding line of a rigid connection structure, so that the heat treatment effect is affected.

Therefore, a steel structure postweld heat treatment device is provided.

Disclosure of Invention

The invention aims to provide a steel structure postweld heat treatment device, which can fix workpieces with different sizes through a moving groove, improves the universality of the device, can rotate the workpieces through the mutual matching of a motor and a rotating shaft so as to adapt to other heat treatment modes, can carry out postweld heat treatment on a steel structure through arranging a propping rotating device, and can also carry out preweld heat treatment and welding treatment on the steel structure, so that the workpieces do not need to be moved, and the working efficiency of the whole welding work is improved.

In order to achieve the purpose, the invention provides the following technical scheme: a steel structure post-weld heat treatment device is characterized in that a supporting plate is fixedly connected to the edge position of the upper surface of a base, a second electric telescopic rod is fixedly connected to the center position of the upper surface of the base, one end of the second electric telescopic rod is movably connected with a tight-resisting rotating device, one end of the tight-resisting rotating device is symmetrically connected with two fixed telescopic devices, one end of the tight-resisting rotating device is fixedly connected with a workpiece, the outer surface of the workpiece is movably connected with a heater, and the outer surface of the heater is movably connected with heat-insulating cotton;

the abutting rotating device comprises a motor, a rotating shaft, a rotating plate, a moving groove, a moving block and a bolt; the improved bearing plate comprises a supporting plate and is characterized in that a motor is fixedly connected to one end of the supporting plate, a rotating shaft is fixedly connected to the output end of the motor, a rotating plate is fixedly connected to one end of the rotating shaft, two moving grooves are symmetrically formed in one side of the side surface of one end of the rotating plate, a moving block is movably connected to the groove of the side surface of one end of the rotating plate, and two bolts are symmetrically arranged inside the moving block.

By arranging the abutting rotating device, when post-welding heat treatment needs to be carried out on the steel structure, the two ends of the workpiece are respectively placed at the groove of the rotating plate, then moving the moving block to a proper position, and finally fixing the workpiece through the mutual matching of the moving groove and the bolt to prevent the heat treatment effect from being influenced by the shaking of the workpiece during working, the device can fix workpieces with different sizes by arranging the movable groove, improves the universality of the device, the workpiece can rotate under the mutual matching of the motor and the rotating shaft so as to adapt to other heat treatment modes, therefore, the steel structure can be subjected to postweld heat treatment by arranging the abutting rotating device, and the steel structure can be subjected to preweld heat treatment and welding treatment, so that a workpiece does not need to be moved, and the working efficiency of the whole welding work is improved.

Preferably, the fixed telescopic device comprises a first electric telescopic rod, a spring, an electromagnet and a telescopic rod; the one end of supporting tight rotating device is symmetrically connected with two first electric telescopic handle, the excircle face fixedly connected with spring of one end of first electric telescopic handle, the inside of spring is provided with the telescopic link, the one end fixedly connected with electro-magnet of spring.

Through setting up fixed telescoping device, at first tie up the heater in welded position department, it is cotton to keep warm, then remove first electric telescopic handle, it ties up the benefit to remove the electro-magnet, then circular telegram the electro-magnet, utilize the elasticity of spring and the magnetism of electro-magnet can make the electro-magnet to tying up the good heater, it is fixed that the heat preservation cotton supports tightly, after the work is accomplished, the outage, the electro-magnet loses magnetism, the spring shrink, consequently, through setting up fixed telescoping device, can fix tying up the benefit with the mode of pasting without anchor clamps are fixed, manpower and time have been saved greatly, avoided simultaneously because of the during operation heater, it is not hard up or the tenesmus that the factor that the heat preservation cotton received gravity and circular telegram thermal expansion, thereby cause the problem of influence to thermal treatment effect.

Preferably, the electromagnet is in a shape of a right-angle plate.

The electromagnet is in a right-angle plate shape, so that the workpiece is conveniently abutted and attached, the abutting and fixing effect is further improved, and the problem that the heat treatment effect is reduced due to the fact that the heater and the heat insulation cotton are loosened is solved.

Preferably, the four corners of the lower surface of the base are fixedly connected with pulleys.

Through being connected with the pulley, can make things convenient for the butt welding after heat treatment device to splice and remove, improved holistic operating speed.

Preferably, the center of the upper surface of the base is fixedly connected with a second electric telescopic rod.

The second electric telescopic rod can enable the workpiece to move up and down, so that the workpiece can be conveniently used by people with different heights, and the usability of the device is improved.

Preferably, a ball bearing is arranged at the connecting position of the rotating shaft and the second electric telescopic rod.

Through setting up ball bearing, can avoid the pivot direct and second electric telescopic handle to carry out the friction rotation, and then reduce life's problem, simultaneously, set up ball bearing also can make work more stable.

Preferably, the device comprises an air bag, the air bag is arranged on the side of the workpiece and is in contact with the workpiece, liquid is arranged in the air bag, the air bag is connected with a first air pipe through a pipeline, the first air pipe is communicated with a first air cylinder, the first air cylinder is arranged in a spring, one end of the first air cylinder is fixedly connected with the electromagnet, and the other end of the first air cylinder is connected with the fixed telescopic device.

Preferably, the pressure-guiding column is arranged in the first air pipe, can slide in the first air pipe and is in sealing contact with the first air pipe, the first air pipe is arranged at the position of the pressure-guiding column in a transparent mode, and the pressure-guiding column can slide back and forth at the position of the pipeline in the transparent mode to indicate the pressure of the air bag.

Preferably, the electromagnet is connected with a second spring, the second spring is connected with a limiting plate, and the limiting plate is connected with the air bag.

Preferably, the liquid in the air bag is alcohol.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention can fix workpieces with different sizes by arranging the abutting rotating device and arranging the moving groove, thereby improving the universality of the device, and the workpieces can rotate under the mutual matching of the motor and the rotating shaft so as to adapt to other heat treatment modes.

2. According to the invention, the fixed telescopic device is arranged, the bound heater and the heat-insulating cotton can be tightly pressed and fixed by the electromagnet by utilizing the flexibility of the spring and the magnetism of the electromagnet, the bound heater and the heat-insulating cotton can be fixed in a mode of fixing and pasting without using a clamp, so that the labor and time are greatly saved, and the problem of negative influence on the heat treatment effect caused by the loosening or falling of the heater and the heat-insulating cotton due to the factors of gravity and electrified thermal expansion during working is solved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a view showing the construction of the working portion of the present invention;

FIG. 3 is a structural view of the tightening rotating device of the present invention;

FIG. 4 is a sectional view of the structure of the tightening rotary device of the present invention;

FIG. 5 is a view showing a structure of a part of the tightening rotating device according to the present invention;

fig. 6 is a structural view of the fixed telescopic device of the present invention.

FIG. 7 is a side view of the electromagnet of the present invention facing the workpiece;

FIG. 8 is a side view of an electromagnet of the present invention facing away from the workpiece;

in the figure: 1. a base; 2. a support plate; 3. a second electric telescopic rod; 4. tightly abutting against the rotating device; 41. an electric motor; 42. a rotating shaft; 43. rotating the plate; 44. a moving groove; 45. a moving block; 46. a bolt; 5. fixing the telescopic device; 51. a first electric telescopic rod; 52. a spring; 53. an electromagnet; 54. a telescopic rod; 6. a workpiece; 7. a heater; 8. heat preservation cotton; 9. a pulley.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, the present invention provides a post-weld heat treatment apparatus for a steel structure, comprising:

a steel structure postweld heat treatment device is shown in figures 1 to 5 and comprises a base 1, wherein a supporting plate 2 is fixedly connected to the edge position of the upper surface of the base 1, a second electric telescopic rod 3 is fixedly connected to the central position of the upper surface of the base 1, one end of the second electric telescopic rod 3 is movably connected with a tightly-abutting rotating device 4, one end of the tightly-abutting rotating device 4 is symmetrically connected with two fixed telescopic devices 5, one end of the tightly-abutting rotating device 4 is fixedly connected with a workpiece 6, the outer surface of the workpiece 6 is movably connected with a heater 7, and the outer surface of the heater 7 is movably connected with heat insulation cotton 8;

the tightening rotating device 4 comprises a motor 41, a rotating shaft 42, a rotating plate 43, a moving groove 44, a moving block 45 and a bolt 46 (wherein the model of the motor 41 is 71M 1-2); one end of the supporting plate 2 is fixedly connected with a motor 41, an output end of the motor 41 is fixedly connected with a rotating shaft 42, one end of the rotating shaft 42 is fixedly connected with a rotating plate 43, two moving grooves 44 are formed in one side of the side surface of one end of the rotating plate 43, a moving block 45 is movably connected to the groove of the side surface of one end of the rotating plate 43, and two bolts 46 are symmetrically arranged inside the moving block 45.

By adopting the technical scheme, when the post-welding heat treatment of the steel structure is required, the two ends of the workpiece 6 are respectively placed at the groove of the rotating plate 43, then the moving block 45 is moved, the moving block 45 is moved to a proper position, and finally the workpiece 6 is fixed under the mutual matching of the moving groove 44 and the bolt 46, so that the heat treatment effect is prevented from being influenced by the shaking of the workpiece 6 during working, the device can fix the workpieces 6 with different sizes by arranging the moving groove 44, the universality of the device is improved, the workpiece 6 can be rotated under the mutual matching of the motor 41 and the rotating shaft 42 to adapt to other heat treatment modes, therefore, the post-welding heat treatment of the steel structure can be carried out by arranging the abutting rotating device 4, and the pre-welding heat treatment and the welding treatment can also be carried out on the steel structure, so that the workpiece 6 does not need to move any more, the working efficiency of the whole welding work is improved.

Specifically, as shown in fig. 6, the fixed telescopic device 5 comprises a first electric telescopic rod 51, a spring 52, an electromagnet 53, and a telescopic rod 54 (wherein the selectable model of the first electric telescopic rod 51 is YS); two first electric telescopic rods 51 are symmetrically connected to one end of the abutting rotating device 4, a spring 52 is fixedly connected to the outer circular surface of one end of each first electric telescopic rod 51, a telescopic rod 54 is arranged inside each spring 52, and an electromagnet 53 is fixedly connected to one end of each spring 52.

Through adopting above-mentioned technical scheme, at first bind up heater 7 in welded position department, heat preservation cotton 8, then remove first electric telescopic handle 51, it ties up the benefit to remove electro-magnet 53, then energize electro-magnet 53, utilize the elasticity of spring 52 and electro-magnet 53's magnetism can make electro-magnet 53 to bind up good heater 7, heat preservation cotton 8 supports tightly fixedly, after the work is accomplished, the outage, electro-magnet 53 loses magnetism, spring 52 contracts, consequently, through setting up fixed telescoping device 5, can fix tying up the benefit with the mode of pasting without anchor clamps is fixed, manpower and time have been saved greatly, avoided simultaneously because of during operation heater 7, heat preservation cotton 8 receives the factor of gravity and circular telegram thermal expansion not hard up or tenesmus, thereby cause the problem of negative impact to thermal treatment effect.

Specifically, as shown in fig. 6, the electromagnet 53 is in the shape of a rectangular plate.

Through adopting above-mentioned technical scheme, electro-magnet 53 is the right angle plate cubic to the convenience supports tight laminating to work piece 6, further improvement support tight fixed effect, avoided taking place to become flexible and lead to the fact the problem that thermal treatment effect reduces because of heater 7, heat preservation cotton 8.

Specifically, as shown in fig. 1, pulleys 9 are fixedly connected to four corners of the lower surface of the base 1.

Through adopting above-mentioned technical scheme, through being connected with pulley 9, can make things convenient for the butt welding after heat treatment device to splice and remove, improved holistic operating speed.

Specifically, as shown in fig. 1, a second electric telescopic rod 3 is fixedly connected to the center of the upper surface of the base 1.

Through adopting above-mentioned technical scheme, can make work piece 6 reciprocate through setting up second electric telescopic handle 3 to the convenience is used by the people work of different heights, has consequently improved the usability of this device.

Specifically, as shown in fig. 5, a ball bearing is disposed at a connecting position of the rotating shaft 42 and the second electric telescopic rod 3.

Through adopting above-mentioned technical scheme, can avoid pivot 42 direct and second electric telescopic handle 3 to carry out the friction rotation through setting up ball bearing, and then reduce life's problem, simultaneously, set up ball bearing also can make work more stable.

The working principle is as follows: when the post-welding heat treatment of the steel structure is needed, firstly, the two ends of the workpiece 6 are respectively placed at the groove of the rotating plate 43, then moving the moving block 45, moving the moving block 45 to a proper position, and finally fixing the workpiece 6 through the mutual matching of the moving groove 44 and the bolt 46, so as to prevent the workpiece 6 from shaking to influence the heat treatment effect during work, the arrangement of the moving groove 44 can fix the workpieces 6 with different sizes, thereby improving the universality of the device, the workpiece 6 can rotate through the mutual matching of the motor 41 and the rotating shaft 42, so as to adapt to other heat treatment modes, therefore, the abutting rotating device 4 can be arranged to carry out postweld heat treatment on the steel structure and carry out preweld heat treatment and welding treatment on the steel structure, so that the workpiece 6 does not need to be moved, and the working efficiency of the whole welding work is improved; then bind up heater 7 in welded position department, the cotton 8 that keeps warm, then remove first electric telescopic handle 51, it ties up the benefit to remove electro-magnet 53, then with electro-magnet 53 circular telegram, utilize the elasticity of spring 52 and electro-magnet 53's magnetism can make electro-magnet 53 to tie up good heater 7, the cotton 8 that keeps warm supports tightly fixedly, after the work is accomplished, the outage, electro-magnet 53 loses magnetism, spring 52 contracts, consequently, through setting up fixed telescoping device 5, can fix tying up the benefit with the mode of pasting without anchor clamps is fixed, manpower and time have been saved greatly, avoided simultaneously because of during operation heater 7, the cotton 8 that keeps warm is not hard up or drops by the factor that gravity and circular telegram thermal expansion, thereby cause the problem of influence to thermal treatment effect.

In some embodiments, the gas bag 10 is included, the gas bag 10 is disposed on the side of the workpiece 6 and contacts with the workpiece 6, the gas bag 10 is disposed with a liquid therein, the gas bag 10 is connected with a first gas pipe 11 through a pipeline, the first gas pipe 11 leads to a first gas cylinder 12, the first gas cylinder 12 is disposed in a spring 52, one end of the first gas cylinder 12 is fixedly connected with the electromagnet 53, and the other end is connected with the fixed telescopic device 5.

When this embodiment is implemented, liquid in the gasbag is located the lateral wall of work piece, when the work piece anneals, because the higher heat of temperature transmits to gasbag 10, the liquid vaporization in gasbag 10 promotes first cylinder 12 extension through first trachea 11, realize the further centre gripping of electro-magnet 53 to the work piece through the extension that promotes first cylinder 12, treat the work piece annealing completion back, the temperature reduces, the liquid liquefaction in the gasbag, the atmospheric pressure reduces, the cylinder contracts, reduce the centre gripping of first cylinder 12 to the work piece, to the work piece centre gripping when realizing annealing, relax the effect of work piece after the annealing completion, simultaneously because when the work piece anneals, lateral wall and air direct contact, the heat when having utilized the work piece annealing, the heat loss of work piece annealing has been avoided, the energy has been saved.

It should be noted that, the cylinder can also be provided with an air release port which is opened and closed, so that the phenomenon that the air is released when the heat is dissipated too slowly and the pressure in the first cylinder is too high and needs to be taken out is avoided.

In some embodiments, a pressure guiding column 13 is included, which is disposed in the first air tube 11, is slidable in the first air tube 11, and is in sealing contact with the first air tube 11, the first air tube 11 is disposed at the pressure guiding column 13 in a transparent manner, and the pressure guiding column 13 can slide back and forth at the transparent portion of the pipeline to indicate the pressure of the air bag 10.

When the embodiment is implemented, the pressure guide column 13 is used for transmitting the pressure in the air bag to the first air cylinder 12, so that the liquid is prevented from evaporating and directly entering the first air cylinder to damage the inside of the air cylinder, and meanwhile, the pressure guide column 13 is located at the position in the first air pipe 11 and can reflect the pressure in the air bag, so that the approximate temperature of the workpiece is judged.

Furthermore, a graduated scale can be arranged in the transparent position to reflect the pressure of the air bag.

In some embodiments, the electromagnet 53 is connected with the second spring 14, the second spring 14 is connected with the limit plate 15, and the limit plate 15 is connected with the airbag 10.

Limiting plate 15 can carry out the centre gripping to the work piece side, and then gives the gasbag with heat transfer, and limiting plate 15 can adjust the centre gripping size through second spring 14 simultaneously.

In some embodiments, the liquid within the bladder 10 is alcohol.

The alcohol has low vaporization point, is easy to vaporize and is convenient to absorb heat to generate enough pressure.

The electric elements in the document are electrically connected with an external main controller and 220V mains supply through a transformer, the main controller can be a conventional known device controlled by a computer and the like, the product model provided by the invention is only used according to the structural characteristics of the product, the product can be adjusted and modified after being purchased, so that the product is more matched with and accords with the technical scheme of the invention, the product model is a technical scheme of the optimal application of the technical scheme, the product model can be replaced and modified according to the required technical parameters, and the product model is familiar to the technical personnel in the field, so that the technical scheme provided by the invention can clearly obtain the corresponding use effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.