CN220312035U - Brazing tool - Google Patents

Abstract

The utility model discloses a brazing tool which is applied to a rack provided with two automatic brazing devices at intervals along the circumferential direction, and comprises an index plate and a plurality of brazing tool modules, wherein the index plate is used for being rotationally connected to the rack, the number of the brazing tool modules is an integer multiple of 2 and is more than or equal to 4, the plurality of brazing tool modules are circumferentially distributed on the index plate, the interval angle between two adjacent brazing tool modules is equal to the interval angle between the two automatic brazing devices, and the index plate is driven by a driving assembly to rotate for a set angle for a single time; each brazing tool module comprises a vertical plate which is parallel to the height direction and arranged on the index plate, and a fixed core rod which is parallel to the radial direction of the index plate and is used for being inserted and fixed with the ice making barrel body is arranged on the vertical plate; a positioning block is arranged right above the fixed core rod in parallel, and one end of the positioning block, which is away from the vertical plate, is provided with a positioning groove for embedding and limiting the refrigerant pipe. The utility model can realize continuous brazing operation and simultaneously shorten the intermediate standby time of the automatic brazing equipment.

Description

Brazing tool

Technical Field

The utility model relates to the technical field of refrigeration equipment manufacturing, in particular to a brazing tool.

Background

When the refrigerating equipment such as an ice making barrel is produced and manufactured, after the positions of the ice making barrel body and the refrigerant pipe are fixed, flame brazing is needed to be carried out on the contact position of the ice making barrel body and the refrigerant pipe so as to ensure the firmness and the tightness of the contact position of the stainless steel tubular ice making barrel body and the copper refrigerant pipe, thereby ensuring the pressure bearing capacity of the ice making barrel.

In order to solve the problems, some manufacturers produce automatic brazing equipment, in the process of flame brazing operation, the ice making barrel body and the refrigerant pipe are placed and fixed on a tool of a frame, and then the automatic brazing equipment is started to perform the brazing operation, but most of the existing brazing tools can only be matched with a single automatic brazing equipment for use, only one ice making barrel finished product can be brazed once, after the brazing operation is completed, the automatic brazing equipment is required to be stopped, the ice making barrel finished product can be taken down by an operator, the refrigerant pipe can be placed and fixed again, then the brazing operation can be performed, the intermediate waiting time is long, and the production efficiency is low.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defects that the brazing tool in the prior art can only be matched with a single automatic brazing device, and the brazing tool has long standby time and low production efficiency in the process of replacing a new ice making barrel main body and a refrigerant pipe to be brazed, so as to provide the brazing tool.

The utility model provides a brazing tool which is applied to a rack with two automatic brazing devices arranged at intervals along the circumferential direction, wherein the brazing tool comprises an index plate and a plurality of brazing tool modules, wherein the index plate is used for being rotationally connected to the rack, the rotation center of the index plate coincides with the circle center of the circumferential outline of the two automatic brazing devices distributed along the circumferential direction, and the index plate is driven by a driving assembly to rotate for a set angle for one time;

the number of the brazing tool modules is an integer multiple of 2 and is more than or equal to 4, the plurality of the brazing tool modules are circumferentially and equally arranged on the index plate at equal intervals, and the interval angle between two adjacent brazing tool modules is equal to the interval angle between two automatic brazing devices;

each brazing tool module comprises:

the vertical plate is arranged on the index plate and is parallel to the height direction;

the fixed core rod is arranged on the vertical plate and is parallel to the radial direction of the index plate, and the fixed core rod is used for being inserted and fixed by the ice making barrel main body;

the positioning block is arranged on the vertical plate and is positioned right above the fixed core rod along the height direction, one end of the positioning block, which is away from the vertical plate, is provided with a positioning groove, and the positioning groove is used for embedding and limiting a refrigerant pipe.

According to the brazing tool provided by the utility model, at least the following technical effects are achieved: the fixture is applied to a rack with two automatic brazing devices, the number of the brazing fixture modules is an integral multiple of the number of the automatic brazing devices and is more than or equal to 4, and the interval angle between two adjacent brazing fixture modules is equal to the interval angle between two automatic brazing devices; in the process of brazing operation, firstly, through the mode that an inner cavity of an ice making barrel body is inserted and fixed on a fixed core rod, two ends of a refrigerant pipe in the height direction are respectively embedded into a connecting hole and a positioning groove of the ice making barrel body, the ice making barrel body and the refrigerant pipe are fixedly placed on each brazing tool module, then two automatic brazing devices are started to automatically braze the ice making barrel body and the refrigerant pipe on the brazing tool module in a processing station respectively, after the automatic brazing operation is finished, a driving assembly is started to drive an index plate to rotate a set angle for one time (namely, twice of the interval angle between the two automatic brazing devices), and the two brazing tool modules after the brazing operation are carried out of the processing station, and simultaneously, the two brazing tool modules for placing the ice making barrel body and the refrigerant pipe which are fixedly used for the brazing operation are rotated into the processing stations respectively corresponding to the two automatic brazing devices; and then, when the two automatic brazing devices respectively perform automatic brazing operation on the ice making barrel main body and the refrigerant pipe on the brazing tool modules in the processing stations, taking down and placing the ice making barrel finished products on the two brazing tool modules with the brazing operation again to fix the ice making barrel main body and the refrigerant pipe, so that the standby time in the middle of the automatic brazing devices is shortened when the continuous brazing operation is performed, the welding operation can be performed on the two ice making barrel finished products at a time, and the production efficiency is high.

Preferably, the brazing device further comprises nitrogen gas distribution tanks arranged at the centers of the upper ends of the dividing plates, which are opposite to each other, along the height direction, each brazing tool module comprises a first nitrogen gas conveying pipe communicated with the corresponding nitrogen gas distribution tank, a first electromagnetic valve for controlling the on-off of the first nitrogen gas conveying pipe is arranged on the first nitrogen gas conveying pipe, and the air outlet end of the first nitrogen gas conveying pipe is used for communicating a refrigerant pipe and is used for introducing nitrogen into the refrigerant pipe.

Preferably, a horizontal part is arranged on the opposite upper end surface of the refrigerant pipe along the height direction along the radial direction of the index plate towards one end deviating from the vertical plate, one end of the positioning block deviating from the vertical plate is connected with a vertical plate through a connecting column, and a jack is formed in the position of the vertical plate corresponding to the horizontal part along the thickness direction of the vertical plate in a penetrating manner; a first vent hole communicated with the jack is arranged in the opposite upper end of the vertical plate along the height direction, and the other end of the first vent hole is communicated with the air outlet end of the first nitrogen conveying pipe;

the inside of the jack is detachably connected with a ventilation core rod in an interference manner, and the ventilation core rod extends out of the jack towards one end of the positioning groove and is used for being inserted into the horizontal part of the refrigerant pipe; the ventilation core rod is provided with a second ventilation hole towards one end of the positioning groove along the length direction of the ventilation core rod, and a third ventilation hole communicated with the first ventilation hole and the second ventilation hole is formed in the part of the ventilation core rod, which is positioned in the insertion hole, along the radial direction of the ventilation core rod.

Preferably, two mounting plates are arranged on opposite upper end surfaces of the positioning block in the height direction at intervals along the length direction of the positioning block, each mounting plate is provided with a mounting hole in a penetrating mode along the length direction of the positioning block, and the first nitrogen conveying pipe sequentially penetrates through the two mounting holes of the mounting plates to be arranged.

Preferably, a fourth vent hole is arranged in the end, facing the vertical plate, of the fixed core rod along the radial direction of the index plate, a nitrogen inlet joint is arranged at the air inlet end of the fourth vent hole, and a plurality of fifth vent holes communicated with the fourth vent hole are penetrated through the outer peripheral surface of the fixed core rod along the radial direction of the fixed core rod;

each brazing tool module comprises a second nitrogen conveying pipe communicated with the nitrogen distributing tank, a second electromagnetic valve for controlling on-off of the second nitrogen conveying pipe is arranged on the second nitrogen conveying pipe, and the air outlet end of the second nitrogen conveying pipe is detachably connected with the nitrogen inlet joint in a plugging mode.

Preferably, the nitrogen inlet joint is detachably connected with the air inlet end of the fourth air hole; the fixed core rod is detachably connected with the vertical plate.

Preferably, a first external thread is arranged at one end of the nitrogen inlet joint, which faces the fourth air hole, and a first internal thread matched with the first external thread is arranged at the air inlet end of the fourth air hole;

and/or a plurality of second threaded holes are arranged at intervals along the circumferential direction of the fixed core rod towards the end face of one end of the vertical plate, and the second threaded holes are parallel to the length direction of the fixed core rod; and a second through hole is formed in the position, corresponding to the second threaded hole, of the vertical plate, and when the vertical plate is assembled, a second fastening bolt penetrates through the second through hole to be screwed with the corresponding second threaded hole.

Preferably, the vertical plate is provided with a supporting plate, the supporting plate is located under the position, along the height direction, of the fixed core rod and is parallel to the fixed core rod, one end, facing the fixed core rod, of the supporting plate is provided with a limiting groove, and the limiting groove is used for limiting the ice making barrel body to rotate along the circumferential direction of the ice making barrel body.

Preferably, the dividing plate is rotatably connected to the frame through a rotating shaft, the driving assembly comprises a stepping motor, a gear reducer is arranged at the output end of the stepping motor, and the gear reducer is connected with the rotating shaft.

Preferably, a mounting seat is arranged between the lower end face of the vertical plate along the height direction and the index plate, the mounting seat is parallel to the fixed core rod and is positioned right below the fixed core rod along the height direction, and the projection of the fixed core rod along the height direction falls into the range of the mounting seat.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a front view of a brazing tool assembled on a frame according to an embodiment of the present utility model;

FIG. 2 is a schematic perspective view of a brazing tool according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of a brazing tool module according to an embodiment of the present utility model;

FIG. 4 is an exploded view of a braze tool module according to an embodiment of the utility model;

FIG. 5 is a schematic cross-sectional front view of a braze tool module in an embodiment of the utility model;

fig. 6 is an enlarged schematic view at a in fig. 5.

Reference numerals illustrate:

1-a frame;

2-dividing disc, 21-rotating shaft, 22-stepping motor and 23-gear reducer;

3-brazing tool modules, 31-vertical plates, 311-second fastening bolts, 312-through grooves, 32-fixed core rods, 321-fourth air holes, 322-nitrogen inlet joints, 323-fifth air holes, 33-positioning blocks, 331-positioning grooves, 34-first nitrogen delivery pipes, 35-vertical plates, 351-connecting columns, 352-jacks, 353-first air holes, 36-air core rods, 361-second air holes, 362-third air holes, 37-mounting plates, 38-support plates, 381-limiting grooves, 39-mounting seats and 391-support columns;

4-an ice making barrel body;

5-refrigerant pipe, 51-horizontal part.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1 to 5, a brazing tool provided in this embodiment is applied to a frame 1 with two automatic brazing devices (not shown in the drawings) arranged at intervals along the circumferential direction, the brazing tool includes an index plate 2 and a plurality of brazing tool modules 3, the index plate 2 is rotatably connected to the frame 1, the rotation center of the index plate 2 coincides with the circle center of the circumferential outline of the two automatic brazing devices distributed along the circumferential direction, and the index plate 2 is driven by a driving assembly to rotate for a set angle for a single time; the number of the brazing tool modules 3 is an integer multiple of 2, in this embodiment, eight brazing tool modules 3 are preferably arranged, the eight brazing tool modules 3 are circumferentially arranged on the index plate 2 at equal intervals, and the interval angle between two adjacent brazing tool modules 3 is equal to the interval angle between two automatic brazing devices; each of the brazing tooling modules 3 comprises a vertical plate 31 arranged on the index plate 2, the vertical plates 31 being arranged parallel to the height direction; a fixed core rod 32 is arranged on one side of the vertical plate 31, which is away from the circle center of the index plate 2, and the fixed core rod 32 is parallel to the radial direction of the index plate 2 and is used for being inserted and fixed by the ice making barrel main body 4; the one side of vertical board 31 deviating from the centre of a circle of graduated disk 2 is provided with locating piece 33, locating piece 33 is located fixed plug 32 is along the relative top of direction of height, and is on a parallel with fixed plug 32, locating piece 33 deviates from the one end of vertical board 31 has seted up constant head tank 331, constant head tank 331 is used for supplying refrigerant pipe 5 embedding spacing. It is understood that the height direction shown in this embodiment refers to the height direction in fig. 5.

By applying the soldering tool of the embodiment to the frame 1 with two automatic soldering apparatuses, the number of soldering tool modules 3 is four times that of the automatic soldering apparatuses, and the interval angle between two adjacent soldering tool modules 3 is equal to that between two automatic soldering apparatuses; in the process of performing the brazing operation, firstly, through the mode that the inner cavity of the ice making barrel body 4 is fixedly inserted into the fixed core rod 32 and both ends of the refrigerant pipe 5 along the height direction are respectively embedded into the connecting hole of the ice making barrel body 4 and the positioning groove 331, the ice making barrel body 4 and the refrigerant pipe 5 are fixedly placed on each brazing tool module 3, then two automatic brazing devices are simultaneously started to perform the automatic brazing operation on the ice making barrel body 4 and the refrigerant pipe 5 on the brazing tool module 3 positioned in the processing station of the ice making barrel body, after the automatic brazing operation is finished, the driving assembly is started to drive the index plate 2 to rotate for a set angle for one time (namely, two times of the interval angle between the two automatic brazing devices is ninety degrees), and the two brazing tool modules 3 after the brazing operation is finished are brought out of the processing station, and simultaneously, the two adjacent brazing tool modules 3 for placing and fixing the ice making barrel body 4 and the refrigerant pipe 5 to be brazed are rotated into the processing stations respectively corresponding to the two automatic brazing devices; then, when the two automatic brazing devices respectively perform automatic brazing operation on the ice making barrel main body 4 and the refrigerant pipe 5 on the brazing tool modules 3 in the processing stations, the ice making barrel finished products on the two brazing tool modules 3 with the brazing operation completed are taken down and the fixed ice making barrel main body 4 and the refrigerant pipe 5 are placed again, so that the standby time in the middle of the automatic brazing devices is shortened while continuous brazing operation is realized, the welding operation can be performed on the two ice making barrel finished products at a time, and the production efficiency is high.

In a specific application, the number of the brazing tool modules 3 may be reasonably increased or decreased according to the actual sizes of the frame 1 and the index plate 2, for example, in other embodiments, the number of the brazing tool modules 3 is four, six or ten, etc.

It can be understood that the automatic brazing device is a relatively mature device in the prior art, and the automatic flame brazing is performed at the contact position of the ice making barrel main body 4 and the refrigerant pipe 5 by driving the brazing gun nozzle to move in the three-dimensional direction and performing angle adjustment rotation, so that the structure of the automatic brazing device is not improved in the embodiment, and the specific structure of the automatic brazing device is not developed and explained.

In some embodiments of the present utility model, the brazing tool further includes a nitrogen gas distributing tank (not shown) disposed at a center of an upper end of the dividing plate 2 opposite to the upper end in the height direction, each of the brazing tool modules 3 includes a first nitrogen gas delivery pipe 34 communicating with the nitrogen gas distributing tank, a first electromagnetic valve (not shown) for controlling on/off of the first nitrogen gas delivery pipe 34 is disposed on the first nitrogen gas delivery pipe 34, and an air outlet end of the first nitrogen gas delivery pipe 34 is used for communicating with the refrigerant pipe 5 and is used for introducing nitrogen gas into the refrigerant pipe 5. In the process that the automatic brazing equipment performs automatic brazing operation on the ice making barrel main body 4 and the refrigerant pipe 5 on the brazing tool module 3 positioned in the processing station of the automatic brazing equipment, a first electromagnetic valve of a first nitrogen conveying pipe 34 of the brazing tool module 3 positioned in the processing station of the automatic brazing equipment is opened, nitrogen is introduced into the refrigerant pipe 5, and the nitrogen blows and washes away oxygen of a brazing part of the refrigerant pipe 5 to form a nitrogen protective atmosphere, so that the inside of the brazing part is prevented from being oxidized, and the brazing quality is improved.

It should be noted that, the brazing tool of this embodiment further includes a PLC controller (not shown in the figure), where the driving assembly, the first electromagnetic valve, and the two automatic brazing devices are all electrically connected to the PLC controller, and by writing a control program in the PLC controller, the brazing working procedures of the brazing tool of this embodiment and the two automatic brazing devices can be controlled, so as to achieve the effect of automatically and continuously controlling the brazing operation.

Considering that the opposite upper end surface of the actual refrigerant pipe 5 along the height direction is provided with a horizontal portion 51 along the radial direction of the dividing plate 2 towards the end facing away from the vertical plate 31, in order to ensure that the air outlet end of the first nitrogen delivery pipe 34 is communicated with the inside of the horizontal portion 51, nitrogen is introduced into the refrigerant pipe 5 during the brazing operation; as shown in fig. 3 to 6, in some embodiments of the present utility model, an end of the positioning block 33 facing away from the vertical plate 31 is connected to a vertical plate 35 through a connection post 351, and a jack 352 is formed in the vertical plate 35 corresponding to the position of the horizontal portion 51 in a penetrating manner along the thickness direction of the vertical plate 35; a first vent hole 353 communicated with the insertion hole 352 is arranged in the height direction in the opposite upper end of the vertical plate 35 along the height direction, and the other end of the first vent hole 353 is communicated with the air outlet end of the first nitrogen delivery pipe 34; the insertion hole 352 is detachably inserted with a ventilation core rod 36 in an interference manner, and one end of the ventilation core rod 36, which faces the positioning groove 331, extends out of the insertion hole 352 and is used for being inserted into the horizontal part 51 of the refrigerant pipe 5; a second vent hole 361 is provided in an end of the vent core rod 36 facing the positioning groove 331 along a length direction of the vent core rod 36, and a third vent hole 362 communicating the first vent hole 353 and the second vent hole 361 is provided in a portion of the vent core rod 36 located in the insertion hole 352 along a radial direction of the vent core rod 36. In the process of placing the refrigerant pipe 5 in the brazing tool module 3, firstly, the ventilation core rod 36 is taken out from the jack 352 to release the space in the positioning groove 331, so that the lower end of the refrigerant pipe 5 passes through the positioning groove 331 along the height direction and is embedded in the connecting hole of the ice making barrel main body 4, the horizontal part 51 of the refrigerant pipe 5 is embedded and limited in the positioning groove 331, then the ventilation core rod 36 is inserted into the jack 352 and the third ventilation hole 362 is ensured to be aligned and communicated with the first ventilation hole 353, more stable fixing of the refrigerant pipe 5 is facilitated, in the process of brazing the refrigerant pipe 5 and the ice making barrel main body 4, nitrogen discharged from the air outlet end of the first nitrogen conveying pipe 34 is sequentially introduced into the horizontal part 51 through the first ventilation hole 353, the third ventilation hole 362 and the second ventilation hole 361, so that nitrogen is introduced into the refrigerant pipe 5, oxygen of a brazing part of the refrigerant pipe 5 is blown away by the nitrogen, the inside of the brazing part is prevented from being oxidized, and the brazing quality is improved. In the process of taking out the ice making barrel finished product from the brazing tool module 3 and repositioning the fixed refrigerant pipe 5 after the brazing operation is finished, firstly taking out the ventilation core rod 36 from the jack 352 and the horizontal part 51, releasing the limit of the refrigerant pipe 5 and releasing the space in the positioning groove 331, thereby taking out the ice making barrel finished product from the brazing tool module 3 and repositioning the fixed refrigerant pipe 5.

As shown in fig. 3 to 5, in some embodiments of the present utility model, two mounting plates 37 are disposed on opposite upper end surfaces of the positioning block 33 along the length direction thereof at intervals, each mounting plate 37 is formed with a mounting hole penetrating through the positioning block 33 along the length direction thereof, and the first nitrogen delivery pipe 34 is disposed sequentially through the mounting holes of the two mounting plates 37. The first nitrogen delivery pipe 34 is supported and limited through the mounting plate 37, so that the first nitrogen delivery pipe 34 can be prevented from displacing relative to the positioning block 33 in the rotation process of the dividing plate 2, and the effect of introducing nitrogen into the refrigerant pipe 5 is affected.

As shown in fig. 4 and 5, in some embodiments of the present utility model, a fourth vent hole 321 is disposed in an end of the fixed mandrel 32 facing the vertical plate 31 along a radial direction of the dividing plate 2, an air inlet end of the fourth vent hole 321 is provided with a nitrogen inlet joint 322, five fifth vent holes 323 communicating with the fourth vent hole 321 are penetrated through an outer circumferential surface of the fixed mandrel 32 along a radial direction thereof, and the five fifth vent holes 323 are disposed along a circumferential direction of the fixed mandrel 32; each brazing tool module 3 comprises a second nitrogen conveying pipe (not shown in the figure) communicated with the nitrogen gas distributing tank, a second electromagnetic valve (not shown in the figure) for controlling the on-off of the second nitrogen conveying pipe is arranged on the second nitrogen conveying pipe, and the air outlet end of the second nitrogen conveying pipe is detachably connected with the nitrogen inlet joint 322 in a plugging mode. In the process that the automatic brazing equipment performs automatic brazing operation on the ice making barrel main body 4 and the refrigerant pipe 5 on the brazing tool module 3 positioned in the processing station of the automatic brazing equipment, a second electromagnetic valve of a second nitrogen conveying pipe of the brazing tool module 3 positioned in the processing station of the automatic brazing equipment is opened, and nitrogen discharged from the air outlet end of the second nitrogen conveying pipe sequentially passes through the nitrogen inlet joint 322, the fourth air hole 321 and the fifth air hole 323 to convey nitrogen to the inner wall of the ice making barrel main body 4, so that the ice making barrel main body 4 is cooled, and the brazing quality is improved. The second electromagnetic valve is electrically connected with the PLC controller.

It should be noted that, in the prior art, the detachable connection structure between the gas outlet end of the second nitrogen delivery pipe and the gas inlet connector 322 may be, for example, a pluggable connection mode between a fire pipe and a fire hydrant connector.

In order to facilitate the connection of the gas outlet end of the second nitrogen delivery pipe with the nitrogen inlet joint 322 by directly penetrating the vertical plate 31, the path of the second nitrogen delivery pipe is shortened, as shown in fig. 5, specifically, a through groove 312 penetrates through the vertical plate 31 at a position corresponding to the inlet joint along the thickness of the vertical plate 31.

In some embodiments of the present utility model, the nitrogen inlet connector 322 is detachably connected to the air inlet end of the fourth air hole 321; the fixed core rod 32 is detachably connected with the vertical plate 31. By means of the arrangement, the original fixed core rod 32 can be detached according to the difference of the inner diameters of the ice making barrel main bodies 4 to be brazed, the fixed core rod 32 with the corresponding outer diameter is replaced (the size of the fourth air hole 321 of the fixed core rod 32 is unchanged) to be matched, and the application range of the brazing tool of the embodiment is further enlarged.

In this embodiment, the detachable connection structure of the nitrogen inlet connector 322 and the fourth air hole 321 is not limited, so as to ensure that the tightness of the connection between the nitrogen inlet connector 322 and the fourth air hole 321 is improved on a detachable basis, thereby improving the stability of the whole tool; as shown in fig. 4 and 5, preferably, an end of the nitrogen inlet joint 322 facing the fourth air hole 321 is provided with a first external thread, and an air inlet end of the fourth air hole 321 is provided with a first internal thread matched with the first external thread. Of course, in other embodiments, the detachable connection structure of the nitrogen inlet connector 322 and the fourth air hole 321 may be other structures such as a clamping block and a clamping groove that are fastened to each other.

In this embodiment, the detachable connection structure of the fixed core rod 32 and the vertical plate 31 is not limited, so as to ensure that the tightness of the connection between the fixed core rod 32 and the vertical plate 31 is improved on a detachable basis, thereby improving the stability of the whole tool; as shown in fig. 4, preferably, two second threaded holes are provided at intervals along the circumferential direction of the fixed core rod 32 toward the end surface of the fixed core rod 32 at one end of the vertical plate 31, and the second threaded holes are parallel to the length direction of the fixed core rod 32; a second through hole is formed in the vertical plate 31 at a position corresponding to the second threaded hole, and a second fastening bolt 311 is screwed with the corresponding second threaded hole through the second through hole when assembled; of course, in other embodiments, the detachable connection structure of the fixed core rod 32 and the vertical plate 31 may be other structures such as a clip and a clip groove that are fastened to each other.

As shown in fig. 3 and 4, in some embodiments of the present utility model, a support plate 38 is disposed on a side of the vertical plate 31 facing away from the center of the circle of the index plate 2, the support plate 38 is located under the fixed core rod 32 in the height direction and parallel to the fixed core rod 32, and a limit groove 381 is disposed at an end of the support plate 38 facing the fixed core rod 32, where the limit groove 381 is used to limit the rotation of the ice making barrel body 4 along the circumferential direction of the ice making barrel body 4. When the inner cavity of the ice making barrel body 4 is inserted into the fixed core rod 32, the outer side face of the lower end of the ice making barrel body 4 along the height direction is clamped in the limiting groove 381, the limiting groove 381 can support the ice making barrel body 4 and limit the ice making barrel body 4 to rotate in the limiting groove 381 along the circumferential direction of the ice making barrel body 4 under the action of external force, and the brazing quality is further improved.

In some embodiments of the present utility model, the index plate 2 is rotatably connected to the frame 1 through a rotation shaft 21, the driving assembly includes a stepper motor 22, an output end of the stepper motor 22 is provided with a gear reducer 23, and the gear reducer 23 is connected to the rotation shaft 21. The rotation angle of the stepping motor 22 is proportional to the pulse number, fast in response and high in reliability, the single-time driving of the index plate 2 is convenient to control, the single-time rotation angle of the index plate 2 is ensured to be a set angle (namely, twice as large as the interval angle between two automatic brazing devices, ninety degrees), and therefore accurate continuous operation of continuous brazing operation is ensured, and the production efficiency is high. Meanwhile, through the speed reduction of the gear reducer 23, the index plate 2 is conveniently driven to rotate at a set angle in a single and stable mode. In a specific application, the structure of the driving assembly may be reasonably selected according to an actual brazing condition, for example, in other embodiments, the driving assembly includes a servo motor, and an output end of the servo motor is connected to the rotating shaft 21.

As shown in fig. 3 to 5, in some embodiments of the present utility model, a mounting seat 39 is disposed between the opposite lower end surface of the vertical plate 31 in the height direction and the index plate 2, the mounting seat 39 is parallel to the fixed core rod 32 and is located directly below the fixed core rod 32 in the height direction, and the projection of the fixed core rod 32 in the height direction falls within the range of the mounting seat 39. The connecting area of the brazing tool module 3 and the index plate 2 is further increased through the mounting seat 39, so that the brazing tool module 3 is connected to the index plate 2 more stably.

In order to avoid the deformation of the support plate 38 caused by the excessive length, and to affect the limiting effect on the ice making barrel body 4, as shown in fig. 3 to 5, specifically, the mounting seat 39 is provided with a support column 391, and the opposite upper end surfaces of the support column 391 along the height direction are abutted against the support plate 38.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. The brazing tool is applied to a rack (1) provided with two automatic brazing devices at intervals along the circumferential direction, and is characterized by comprising an index plate (2) and a plurality of brazing tool modules (3), wherein the index plate (2) is used for being rotationally connected to the rack (1), the rotation center of the index plate (2) coincides with the circle centers of circumferential outlines of the two automatic brazing devices distributed along the circumferential direction, and the index plate (2) is driven by a driving assembly to rotate for a set angle for one time;

the number of the brazing tool modules (3) is an integer multiple of 2 and more than or equal to 4, the plurality of the brazing tool modules (3) are circumferentially and equally arranged on the index plate (2) at equal intervals, and the interval angle between two adjacent brazing tool modules (3) is equal to the interval angle between two automatic brazing devices;

each brazing tool module (3) comprises:

a vertical plate (31) provided on the index plate (2) and parallel to the height direction;

the fixed core rod (32) is arranged on the vertical plate (31) and is parallel to the radial direction of the index plate (2), and the fixed core rod (32) is used for being inserted and fixed by the ice making barrel main body (4);

the positioning block (33) is arranged on the vertical plate (31), the positioning block (33) is positioned right above the fixed core rod (32) along the height direction, one end of the positioning block (33) deviating from the vertical plate (31) is provided with a positioning groove (331), and the positioning groove (331) is used for embedding and limiting the refrigerant pipe (5).

2. The brazing tool according to claim 1, further comprising a nitrogen gas distribution tank arranged at the center of the upper ends of the dividing plate (2) opposite to each other in the height direction, wherein each brazing tool module (3) comprises a first nitrogen gas conveying pipe (34) communicated with the nitrogen gas distribution tank, a first electromagnetic valve for controlling on-off of the first nitrogen gas conveying pipe (34) is arranged on the first nitrogen gas conveying pipe (34), and an air outlet end of the first nitrogen gas conveying pipe (34) is used for communicating with a refrigerant pipe (5) and is used for introducing nitrogen gas into the refrigerant pipe (5).

3. The brazing tool according to claim 2, wherein a horizontal portion (51) is provided at an end of the refrigerant pipe (5) facing away from the vertical plate (31) in a radial direction of the index plate (2), a vertical plate (35) is connected to an end of the positioning block (33) facing away from the vertical plate (31) through a connecting column (351), and a jack (352) is formed at a position of the vertical plate (35) corresponding to the horizontal portion (51) in a thickness direction of the vertical plate (35); a first vent hole (353) communicated with the jack (352) is arranged in the opposite upper end of the vertical plate (35) along the height direction, and the other end of the first vent hole (353) is communicated with the air outlet end of the first nitrogen delivery pipe (34);

the inside of the insertion hole (352) is detachably connected with a ventilation core rod (36) in an interference manner, and one end of the ventilation core rod (36) facing the positioning groove (331) extends out of the insertion hole (352) and is used for being inserted into the horizontal part (51) of the refrigerant pipe (5); the ventilation core rod (36) is provided with a second ventilation hole (361) towards one end of the positioning groove (331) along the length direction of the ventilation core rod (36), and a third ventilation hole (362) which is communicated with the first ventilation hole (353) and the second ventilation hole (361) is arranged at the part of the ventilation core rod (36) located at the insertion hole (352) along the radial direction of the ventilation core rod (36).

4. A brazing tool according to claim 2, wherein two mounting plates (37) are arranged on opposite upper end surfaces of the positioning block (33) along the height direction at intervals along the length direction, mounting holes are formed in each mounting plate (37) in a penetrating manner along the length direction of the positioning block (33), and the first nitrogen conveying pipe (34) sequentially penetrates through the mounting holes of the two mounting plates (37).

5. A brazing tool according to any one of claims 2 to 4, wherein a fourth vent hole (321) is arranged in the radial direction of the dividing plate (2) in one end of the fixed core rod (32) facing the vertical plate (31), a nitrogen inlet joint (322) is arranged at the air inlet end of the fourth vent hole (321), and a plurality of fifth vent holes (323) communicated with the fourth vent hole (321) penetrate through the outer peripheral surface of the fixed core rod (32) along the radial direction;

each brazing tool module (3) comprises a second nitrogen conveying pipe communicated with the nitrogen gas distributing tank, a second electromagnetic valve for controlling on-off of the second nitrogen conveying pipe is arranged on the second nitrogen conveying pipe, and the air outlet end of the second nitrogen conveying pipe is detachably connected with the nitrogen inlet joint (322) in a plugging mode.

6. The brazing tool according to claim 5, wherein the nitrogen inlet joint (322) is detachably connected to the air inlet end of the fourth air vent (321); the fixed core rod (32) is detachably connected with the vertical plate (31).

7. The brazing tool according to claim 6, wherein a first external thread is provided at an end of the nitrogen inlet joint (322) facing the fourth air hole (321), and a first internal thread matching the first external thread is provided at an air inlet end of the fourth air hole (321);

and/or a plurality of second threaded holes are arranged at intervals along the circumferential direction of the fixed core rod (32) towards the end face of one end of the vertical plate (31), and the second threaded holes are parallel to the length direction of the fixed core rod (32); a second through hole is formed in the position, corresponding to the second threaded hole, of the vertical plate (31), and when the vertical plate is assembled, a second fastening bolt (311) penetrates through the second through hole to be screwed with the corresponding second threaded hole.

8. The brazing tool according to claim 1, wherein a supporting plate (38) is arranged on the vertical plate (31), the supporting plate (38) is located under the fixed core rod (32) along the height direction and parallel to the fixed core rod (32), a limit groove (381) is formed in one end, facing the fixed core rod (32), of the supporting plate (38), and the limit groove (381) is used for limiting rotation of the ice making barrel body (4) along the circumferential direction of the ice making barrel body (4).

9. A brazing tool according to claim 1, wherein the indexing disc (2) is rotatably connected to the frame (1) through a rotating shaft (21), the driving assembly comprises a stepping motor (22), a gear reducer (23) is arranged at the output end of the stepping motor (22), and the gear reducer (23) is connected with the rotating shaft (21).

10. A brazing tool according to claim 1, wherein a mounting seat (39) is arranged between the opposite lower end face of the vertical plate (31) in the height direction and the dividing plate (2), the mounting seat (39) is parallel to the fixed core rod (32) and is located right below the fixed core rod (32) in the height direction, and the projection of the fixed core rod (32) in the height direction falls into the range of the mounting seat (39).