CN109604793B

CN109604793B - Spiral case welding equipment

Info

Publication number: CN109604793B
Application number: CN201811606039.2A
Authority: CN
Inventors: 张人斌; 杨成
Original assignee: Hunan Chuangyan Intelligent Equipment Co ltd
Current assignee: Hunan Chuangyan Intelligent Equipment Co ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2021-07-06
Anticipated expiration: 2038-12-27
Also published as: CN109604793A

Abstract

The invention discloses volute welding equipment which comprises a frame body, a seam welding device, a positioning and clamping device and a first driving device for driving the positioning and clamping device to rotate; the positioning and clamping device comprises a positioning and clamping support, an inner support mechanism and an outer pressure mechanism for pressing the outer wall of the welded volute, wherein the inner support mechanism is provided with an electrode matched with the shape of the inner wall of the welded volute; the seam welding device comprises a welding machine and two seam welding mechanisms which are connected with a terminal of the welding machine and are used for welding the welded volute, and the two seam welding mechanisms rotate along with the rotation of the welded volute. When the welding seam welding machine is used, the welded volute is fixed by spot welding, then the welded volute is fixed on the welding seam welding machine, and can be welded and rotated at the same time to match the work of a welding seam mechanism, so that the automatic processing is realized, the labor intensity of workers is reduced, the production efficiency is improved, the welding seam is attractive and uniform, the welding seam strength is high, the connection is stable, the welding seam sealing performance is good, no leakage exists, subsequent sealing treatment is not needed, and the welding seam welding machine can be widely used for welding volutes.

Description

Spiral case welding equipment

Technical Field

The invention relates to welding equipment, in particular to welding equipment for machining a volute.

Background

Seam welding refers to the process of passing a workpiece between two rotating disk-shaped electrodes (rolling disks) to form a continuous weld with overlapped welding points. The welding part is assembled into a lap joint or an inclined butt joint and is arranged between two roller electrodes to move relative to the workpiece, the rollers pressurize the welding part and rotate, and power is continuously or intermittently supplied to form a continuous welding line.

The volute of the air duct of the range hood comprises a coaming and side plates positioned on two sides of the coaming. Two welding seams are arranged between the two side plates and the enclosing plate, and each welding seam is composed of a straight welding seam and a bent welding seam.

The existing volute straight-line segment welding process adopts one side plate of a manually-held volute to be welded with a surrounding plate on one side, and then the other side plate of the volute is welded with the surrounding plate.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide volute welding equipment which can reduce the labor intensity of workers and improve the production efficiency.

The technical scheme provided by the invention comprises the following steps:

a frame body;

the roll welding device is arranged on the frame body;

the positioning and clamping device is arranged on the frame body and used for positioning and clamping the welded volute, and the first driving device is used for driving the positioning and clamping device to rotate;

the positioning and clamping device comprises a positioning and clamping support, an inner supporting mechanism and an outer pressing mechanism, wherein the inner supporting mechanism is connected with the positioning and clamping support and used for positioning and supporting the inner wall of the welded volute, the outer pressing mechanism is connected with the positioning and clamping support and used for pressing the outer wall of the welded volute, and the inner supporting mechanism is provided with an electrode matched with the inner wall of the welded volute in shape;

the seam welding device comprises a welding machine and two seam welding mechanisms which are connected with a terminal of the welding machine and are used for welding the welded volute, and the two seam welding mechanisms rotate along with the rotation of the welded volute.

The welded volute comprises a surrounding plate and side plates positioned on two sides of the surrounding plate.

Wherein first drive arrangement can be rotating equipment such as ordinary motor, servo motor, step motor, and first drive arrangement can set up in the frame, and occupation space is not for drive positioning and clamping device is rotatory, thereby makes the spiral case that is welded on the positioning and clamping device rotatory, in addition, can also cooperate and select for use the speed reducer.

The inner supporting mechanism is used for supporting and positioning the inner wall of the welded volute so that the welded volute keeps the required shape, and the complete positioning is realized after the inner supporting mechanism is matched with the external pressing mechanism.

The seam welding mechanism is connected with the welding machine and is in contact with the welded volute, so that the seam welding mechanism rotates along with the rotation of the welded volute and welding is achieved.

Preferably, the internal support mechanism comprises an upper support plate, a lower support plate and a second driving device, wherein the second driving device is used for enabling the upper support plate and the lower support plate to move coaxially relative to each other, and the electrode comprises an upper electrode connected with the upper support plate and a lower electrode connected with the lower support plate.

The upper supporting plate and the lower supporting plate are used for contacting with the side plate of the welded volute, and the coaxial relative movement means that the moving direction is perpendicular to the side plate of the welded volute, so that the two side plates of the welded volute are limited to the required size.

The second driving device can be an electric cylinder, an air cylinder, an oil cylinder or an electric push rod and other linear driving devices.

Preferably, the upper supporting plate is connected with the positioning clamping support, and the second driving device is connected with the lower supporting plate and drives the lower supporting plate to move coaxially relative to the upper supporting plate. Thereby realizing distance adjustment;

or: the lower supporting plate is connected with the positioning clamping support, and the second driving device is connected with the upper supporting plate and drives the upper supporting plate to move coaxially relative to the lower supporting plate, so that distance adjustment is realized.

Preferably, the inner support mechanism further comprises a first guide mechanism connected with the upper support plate and the lower support plate and used for limiting the movement tracks of the upper support plate and the lower support plate, so that the upper support plate and the lower support plate cannot randomly shake and only one movement perpendicular to the welded volute side plate is realized.

Preferably, the volute casing welding equipment further comprises a travelling mechanism connected with the frame body and the roll welding device and used for driving the roll welding device to move along the horizontal direction, and a second guide mechanism connected with the frame body and the roll welding device and used for limiting the travelling track of the roll welding device. The rolling welding device can move through the travelling mechanism, namely the seam welding mechanism can move, so that the distance between the seam welding mechanism and the welded volute can be adjusted better, the optimal distance is kept, and the optimal welding is realized.

The running mechanism can be a gear rack mechanism, a screw and nut mechanism or other mechanisms capable of moving the roll welding device. The second guiding mechanism can be a slide block and slide rail structure, a guide rod mechanism, a guide rail mechanism and the like.

Preferably, the seam welding device further comprises a first telescopic mechanism connected with the seam welding mechanism and used for driving the seam welding mechanism to move telescopically along the horizontal direction, and the first telescopic mechanism can be a linear driving device such as an electric cylinder, an air cylinder, an oil cylinder or an electric push rod.

Preferably, the seam welding mechanism comprises a seam welding wheel and a bearing seat connected with the seam welding wheel and used for supporting the seam welding wheel. The seam welding wheel is arranged on the bearing seat and can rotate freely, and the seam welding wheel is connected with a wiring end of a welding machine to realize electric conduction.

Preferably, the positioning and clamping device further comprises an auxiliary positioning mechanism connected with the positioning and clamping support and used for auxiliary positioning of the welded volute in the horizontal direction, and particularly used for positioning a coaming of the welded volute, so that continuous movement in the fixing process is prevented, and the fixing difficulty is reduced.

Preferably, the auxiliary positioning mechanism is a linear driving device such as an electric cylinder, an air cylinder or an oil cylinder and is connected to the positioning and clamping support, and when a piston rod of the auxiliary positioning mechanism extends out, the outer surface of the enclosing plate is just clamped, so that auxiliary positioning is realized.

Preferably, the volute welding equipment further comprises a locking mechanism which is arranged on the frame body and the positioning and clamping device and used for locking the horizontal rotating position of the positioning and clamping device.

Preferably, the locking mechanism comprises a second telescopic mechanism arranged on the frame body and a locking groove which is arranged on the positioning and clamping device and matched with the second telescopic mechanism. The second telescopic mechanism can be an electric cylinder, an air cylinder or an oil cylinder and other linear driving devices, and is clamped with the locking groove when a piston rod of the second telescopic mechanism extends out, so that locking is realized, the positioning and clamping device is prevented from rotating when the second telescopic mechanism does not work or is carried, and the second telescopic mechanism can also be used in certain welding occasions which do not need to rotate.

Preferably, the external pressure mechanism comprises a pressure plate and a third telescopic mechanism which is connected with the pressure plate and drives the pressure plate to move relative to the internal support mechanism. The third telescopic mechanism is linear driving equipment such as an electric cylinder, an air cylinder, an oil cylinder and an electric push rod, the pressing plate is driven to move, and the moving direction of the pressing plate is perpendicular to the side plate of the welded volute.

According to the invention, the welded volute is fixed by spot welding, then the welded volute is fixed on the welding machine through the positioning and clamping device, and can rotate while welding, and the welding seam mechanism is matched for working, so that automatic processing is realized, the labor intensity of workers is reduced, the production efficiency is improved, the welding seam is attractive and uniform, the welding seam strength is high, and the connection is stable.

Meanwhile, when welding, the seam welding mechanism is utilized to always press the welded volute and then roll and intermittently or continuously discharge to realize welding. Because the welding seam of being welded the spiral case is pushed down all the time, has played fine design effect, closely pressfitting and the roll extrusion of bounding wall and curb plate, the cooperation high temperature even if under the condition of intermittent type welding, also can guarantee that the welding seam is inseparable, can not reveal.

And through two seam welding mechanisms, wherein one seam welding mechanism is connected with one terminal of the welding machine, and the other seam welding mechanism is connected with the other terminal of the welding machine, after the welded volute is connected with the two seam welding mechanisms, a welding loop is formed, and welding is realized. Therefore, the welding circuit of the invention does not need additional wiring, the welding machine and the seam welding mechanism are arranged together, and the welding circuit is formed by the two seam welding mechanisms, and wiring on the welded volute is not needed, namely, wiring on the positioning and clamping device is not needed, thus simplifying the welding circuit and improving the safety and stability of the equipment.

And, utilize the positioning and clamping device, because the curb plate of both sides is fixed a position simultaneously, guaranteed the concentricity, product quality is high, the shape is just right.

And the distance of the inner support mechanism can be adjusted up and down, the inner support mechanism is completely matched with the inner cavity of the welded volute, excessive compression and insufficient compression are avoided, and the shape of the welded volute is ensured. The spiral case welding machine is also suitable for welded spiral cases with different sizes, and has wide application range.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an overall perspective view of one embodiment of the present invention;

FIG. 2 is another orientation of FIG. 1;

FIG. 3 is a perspective view of one of the seam welding devices;

FIG. 4 is another orientation of FIG. 3;

FIG. 5 is a schematic front view of one of the positioning and clamping devices;

FIG. 6 is a bottom view of FIG. 5;

FIG. 7 is a left side view of FIG. 5;

FIG. 8 is a perspective view of FIG. 5;

FIG. 9 is a perspective view of FIG. 5 in another orientation;

figure 10 is a perspective view of the welded volute of figure 5 after installation.

Detailed Description

The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

It is to be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the generic and descriptive sense only and not for purposes of limitation, as the term is used in the generic and descriptive sense, and not for purposes of limitation, unless otherwise specified or implied, and the specific reference to a device or element is intended to be a reference to a particular element, structure, or component. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "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.

The welded volute 100 comprises a coaming and side plates positioned on two sides of the coaming, wherein the coaming and the side plates are separately blanked in the production process, and finally the coaming and the side plates are required to be welded into a whole.

As shown in fig. 1 to 10, the present embodiment includes:

a frame body 1;

the roll welding device 2 is arranged on the frame body 1;

the positioning and clamping device 3 is arranged on the frame body 1 and used for positioning and clamping the welded volute 100, and the first driving device 4 is used for driving the positioning and clamping device 3 to rotate;

the positioning and clamping device 3 comprises a positioning and clamping support 31, an inner supporting mechanism 32 connected with the positioning and clamping support 31 and used for positioning and supporting the inner wall of the welded volute 100, and an outer pressing mechanism 33 connected with the positioning and clamping support 31 and used for pressing the outer wall of the welded volute 100, wherein the inner supporting mechanism 32 is provided with an electrode 34 matched with the shape of the inner wall of the welded volute 100.

The seam welding device 2 comprises a welding machine 24 and two seam welding mechanisms 23 connected with terminals of the welding machine 24 and used for welding the welded volute 100, and the two seam welding mechanisms 23 rotate along with the rotation of the welded volute 100. As shown in fig. 4, the terminal connections to the welder 24 may be made using copper bars 25.

The electrode 34 can be detachably connected and manufactured into different sizes and shapes, so that the welding device is suitable for different welded volutes 100.

The first driving device 4 may be a rotating device such as a common motor, a servo motor, a stepping motor, etc., preferably a servo motor, which can precisely control the speed. First drive arrangement 4 can set up in support body 1, and occupation space is not for drive positioning and clamping device 3 is rotatory, thereby makes the spiral case 100 that is welded on the positioning and clamping device 3 rotatory, in addition, can also cooperate and choose for use the speed reducer. A coupling hole 36 may be provided at the bottom of the pilot clamp holder 31, and an output shaft of the first driving means 4 is coupled to the coupling hole 36 to thereby drive the pilot clamp holder 31 to rotate.

In order to avoid the welding current from spreading throughout the whole device, an insulating pad may be disposed on the contact surface between the positioning and clamping support 31 and the welded volute, so as to prevent the welding current of the welded volute 100 from flowing to the positioning and clamping support 31. An insulating pad can be arranged on the external pressure mechanism 33 to prevent the current on the welded volute 100 from flowing to the external pressure mechanism 33, and the internal support mechanism 32 is also connected with the positioning and clamping support 31 in an insulating way.

The inner supporting mechanism 32 is used for supporting and positioning the inner wall of the welded volute 100, so that the welded volute 100 maintains a required shape and is matched with the outer pressing mechanism 33 to realize complete positioning.

Wherein, the seam welding mechanism 23 is connected with the welding machine 24 and is contacted with the welded volute 100, so that the seam welding mechanism 23 rotates along with the rotation of the welded volute 100 and realizes welding.

In the embodiment, the welded volute 100 is fixed by spot welding, the welded volute 100 is fixed on the inner support mechanism 32 through the positioning and clamping device 3, the internal shape and size of the welded volute 100 are ensured, the welded volute 100 is completely fixed by positioning in cooperation with the external pressure mechanism 33, and then the welded volute 100 can be welded and rotated at the same time and is matched with the welding seam mechanism 23, so that automatic processing is realized, the labor intensity of workers is reduced, the production efficiency is improved, the welding seam is attractive and uniform, the welding seam intensity is high, and the connection is stable.

Moreover, by using the positioning and clamping device 3, the surrounding plate of the welded volute 100 and the side plates on the two sides of the surrounding plate are positioned at the same time, so that the concentricity is ensured, the product quality is high, and the shape is correct.

The two welding seam mechanisms 23 of the present embodiment just aim at two welding seams of the welded volute 100, so that the welding can be completed by one clamping and one rotation, and the work efficiency is greatly improved. And, one of the seam welding mechanisms 23 is connected to one of the terminals of the welder 24, and the other seam welding mechanism 23 is connected to the other terminal of the welder 24, wherein the terminals include both positive and negative electrodes. After the welded volute 100 is connected with the two seam welding mechanisms 23, a welding loop is formed, and welding is achieved. It can be seen that the welding circuit of the present embodiment does not need additional wiring, the welding machine 24 and the seam welding mechanism 23 are arranged together, and the welding circuit is formed by two seam welding mechanisms 23, and no wiring is needed on the welded volute 100, that is, no wiring is needed on the positioning and clamping device 3, so that the welding circuit is simplified, and the safety and stability of the device are improved. During welding, the seam welding mechanism 23 always presses the welded scroll 100, and then performs welding by intermittent discharge or continuous discharge while rolling. Because the welding seam of the welded volute 100 is pressed all the time, a good shaping effect is achieved, the enclosing plate and the side plate are tightly pressed and rolled, high temperature is matched, the welding seam can be guaranteed to be tight even under the condition of intermittent welding, and the phenomenon of oil leakage of a product cannot occur.

Moreover, the distance of the inner support mechanism 32 can be adjusted up and down, the inner support mechanism is completely matched with the inner cavity of the welded volute 100, excessive compression and insufficient compression are avoided, and the shape of the welded volute 100 is ensured. And the device is also suitable for welded volutes 100 with different sizes, and has wide application range.

As a further preference of this embodiment, the inner supporting mechanism 32 may include an upper supporting plate 321, a lower supporting plate 322, and a second driving device 323 for coaxially and relatively moving the upper supporting plate 321 and the lower supporting plate 322, and the electrode 34 includes an upper electrode 341 connected to the upper supporting plate 321 and a lower electrode 342 connected to the lower supporting plate 322. The upper electrode 341 and the lower electrode 342 are detachably connected and connected by a copper strip, and a plurality of upper electrodes 341 and lower electrodes 342 with different specifications and sizes and shapes can be manufactured, so that the electrode is suitable for different sizes and shapes.

Wherein, the upper supporting plate 321 and the lower supporting plate 322 are used for contacting with the side plate of the welded volute 100, and the coaxial relative movement means that the moving direction is perpendicular to the side plate of the welded volute 100, so as to limit the two side plates of the welded volute 100 to the required size.

Wherein the second driving device 323 can be an electric cylinder, an air cylinder, an oil cylinder or an electric push rod and other linear driving devices.

Furthermore, the upper supporting plate 321 can be connected to the positioning and clamping support 31, and the second driving device 323 is connected to the lower supporting plate 322 and drives the lower supporting plate 322 to move coaxially with respect to the upper supporting plate 321. Thereby achieving distance adjustment.

Of course, the following structure may be adopted:

the lower supporting plate 322 is connected with the positioning and clamping support 31, and the second driving device 323 is connected with the upper supporting plate 321 and drives the upper supporting plate 321 to move coaxially relative to the lower supporting plate 322, so as to realize distance adjustment.

Or, the upper supporting plate 321 and the lower supporting plate 322 are movably connected to the positioning and clamping support 31, and both can adjust the position, and the second driving device 323 can drive the upper supporting plate 321 to move and the lower supporting plate 322 to move.

As a further preference of the present embodiment, the inner supporting mechanism 32 may further include a first guiding mechanism 324 connected to the upper supporting plate 321 and the lower supporting plate 322 and used for defining the movement track of the upper supporting plate 321 and the lower supporting plate 322, so that the upper supporting plate 321 and the lower supporting plate 322 do not shake randomly, and only one movement is perpendicular to the side plate of the welded scroll casing 100. The first guiding mechanism 324 may adopt a structure of a linear bearing and a guide rod guide sleeve, and a plurality of arrangements are required.

As a further preference of the present embodiment, the scroll welding apparatus may further include a traveling mechanism 5 connected to the frame body 1 and the seam welding device 2 and configured to drive the seam welding device 2 to move in the horizontal direction, and a second guide mechanism 6 connected to the frame body 1 and the seam welding device 2 and configured to define a traveling track of the seam welding device 2. The position of the seam welding device 2, namely the position of the seam welding mechanism 23 can be moved through the travelling mechanism 5, so that the distance between the seam welding mechanism 23 and the welded volute 100 can be adjusted better, the optimal distance is kept, and the optimal welding is realized.

Moreover, a plurality of seam welding devices 2 may be provided on the frame body 1, a plurality of welded volutes 100 may be clamped, and a plurality of welds may be realized by movement of the seam welding devices 2. When one of the roll welding devices 2 is used for welding, the other roll welding devices 2 can be clamped, so that the working efficiency is improved doubly. And after the curved section is welded in a rotating mode, the roll welding device 2 does not rotate any more, but keeps a fixed state, and then the travelling mechanism 5 moves to continue to weld the straight section.

The traveling mechanism 5 may be a rack and pinion mechanism, a lead screw-nut mechanism, a screw-nut mechanism, or other mechanisms capable of moving the seam welding device 2. As shown in fig. 2, one of the structures is shown:

the travelling mechanism 5 adopts a feed screw and nut mechanism, a motor drives a feed screw to rotate, a nut is connected with the roll welding device 2, and when the feed screw rotates, the roll welding device 2 is driven to move axially.

The second guiding mechanism 6 may be a slider-rail structure, a guide-bar mechanism, a guide-rail mechanism, etc. The structure using the slider slide rail is shown in fig. 2: the slider sets up on seam welding device 2, and the slide rail setting is on support body 1 to realize the direction.

In a further preferred embodiment of the present invention, the seam welding apparatus 2 may further include a first expansion mechanism 22 connected to the seam welding mechanism 23 for driving the seam welding mechanism 23 to expand and contract in the horizontal direction, and the first expansion mechanism 22 may be a linear driving device such as an electric cylinder, an air cylinder, an oil cylinder, or an electric push rod.

As shown in fig. 3, one of the structures of the first telescoping mechanism 22 is shown: the device comprises a sliding table 222 and a sliding table driving device 221 for driving the sliding table 222 to move, wherein the sliding table driving device 221 can be a linear driving device such as an electric cylinder, an air cylinder, an oil cylinder or an electric push rod. The slide table 222 is driven to move by the operation of the slide table driving device 221.

As a further preferred feature of the present embodiment, the seam welding mechanism 23 may include a seam welding wheel 232 and a bearing housing 231 connected to the seam welding wheel 232 and supporting the seam welding wheel 232. The seam welding wheel 232 is mounted on the bearing seat 231 and can rotate freely, and the seam welding wheel 232 is connected with a terminal of the welding machine 24 to realize electric conduction.

As a further preference of the present embodiment, the positioning and clamping device 3 may further include an auxiliary positioning mechanism 35 connected to the positioning and clamping support 31 and configured to perform auxiliary positioning on the welded volute 100 in the horizontal direction, and in particular, configured to perform positioning on a surrounding plate of the welded volute 100, so as to prevent continuous movement in the fixing process and reduce the fixing difficulty.

The auxiliary positioning mechanism 35 may be an electric cylinder, an air cylinder, an oil cylinder, or other linear driving device, and is connected to the positioning and clamping support 31, and when a piston rod of the auxiliary positioning mechanism 35 extends, the outer surface of the coaming of the welded volute 100 is just clamped, so as to achieve auxiliary positioning.

As a further preference of the present embodiment, the volute welding apparatus may further include a locking mechanism provided on the frame body 1 and the positioning and clamping device 3 for locking a horizontal rotation position of the positioning and clamping device 3.

Wherein, the locking mechanism may include a second telescopic mechanism 38 disposed on the frame body 1 and a locking groove 37 disposed on the positioning and clamping device 3 and matched with the second telescopic mechanism 38. The second telescopic mechanism 38 may be an electric cylinder, an air cylinder, an oil cylinder or other linear driving device, and when the piston rod of the second telescopic mechanism 38 extends, it engages with the locking groove 37, so as to lock the piston rod, and prevent the positioning and clamping device 3 from rotating when the piston rod does not work or is transported.

In a further preferred embodiment of the present invention, the external pressure mechanism 33 includes a pressure plate 331 and a third stretching mechanism 332 connected to the pressure plate 331 and driving the pressure plate 331 to move relative to the internal support mechanism 32. The third telescoping mechanism 332 is a linear driving device such as an electric cylinder, an air cylinder, an oil cylinder, an electric push rod, etc., and drives the pressing plate 331 to move, and the moving direction of the pressing plate 331 is perpendicular to the side plate of the welded scroll casing 100.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that there are no specific structures but a few objective structures due to the limited character expressions, and that those skilled in the art may make various improvements, decorations or changes without departing from the principle of the invention or may combine the above technical features in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.

Claims

1. A volute welding apparatus, comprising:

a frame body (1);

a roll welding device (2) arranged on the frame body (1);

the positioning and clamping device (3) is arranged on the frame body (1) and used for positioning and clamping the welded volute (100), and the first driving device (4) is used for driving the positioning and clamping device (3) to rotate;

the positioning and clamping device (3) comprises a positioning and clamping support (31), an inner supporting mechanism (32) which is connected with the positioning and clamping support (31) and used for positioning and supporting the inner wall of the welded volute (100), and an outer pressing mechanism (33) which is connected with the positioning and clamping support (31) and used for pressing the outer wall of the welded volute (100), wherein the inner supporting mechanism (32) is provided with an electrode (34) matched with the shape of the inner wall of the welded volute (100);

the seam welding device (2) comprises a welding machine (24) and two seam welding mechanisms (23) which are connected with terminals of the welding machine (24) and used for welding the welded volute (100), wherein the two seam welding mechanisms (23) rotate along with the rotation of the welded volute (100);

the distance of the inner supporting mechanism (32) can be adjusted up and down;

the inner supporting mechanism (32) comprises an upper supporting plate (321), a lower supporting plate (322) and a second driving device (323) which is used for enabling the upper supporting plate (321) and the lower supporting plate (322) to move coaxially relative to each other, and the electrode (34) comprises an upper electrode (341) connected with the upper supporting plate (321) and a lower electrode (342) connected with the lower supporting plate (322).

2. The spiral casing welding apparatus of claim 1, characterized in that the upper support plate (321) is connected with a positioning clamping support (31), and the second driving device (323) is connected with the lower support plate (322) and drives the lower support plate (322) to move coaxially with respect to the upper support plate (321);

or: the lower supporting plate (322) is connected with the positioning clamping support (31), and the second driving device (323) is connected with the upper supporting plate (321) and drives the upper supporting plate (321) to move coaxially relative to the lower supporting plate (322).

3. The spiral casing welding apparatus of claim 1 wherein the inner support mechanism (32) further comprises a first guide mechanism (324) connected to the upper support plate (321) and the lower support plate (322) for defining the motion trajectory of the upper support plate (321) and the lower support plate (322).

4. The spiral casing welding device according to any one of claims 1 to 3, further comprising a traveling mechanism (5) connected to the frame body (1) and the seam welding device (2) and configured to drive the seam welding device (2) to move in the horizontal direction, and a second guiding mechanism (6) connected to the frame body (1) and the seam welding device (2) and configured to define a traveling track of the seam welding device (2).

5. The spiral casing welding apparatus of any of claims 1 to 3, wherein the seam welding device (2) further comprises a first telescoping mechanism (22) connected to the seam welding mechanism (23) for driving the seam welding mechanism (23) to move telescopically in a horizontal direction.

6. The spiral casing welding apparatus of any of claims 1 to 3 wherein the seam welding mechanism (23) includes a seam welding wheel (232) and a bearing housing (231) connected to the seam welding wheel (232) and supporting the seam welding wheel (232).

7. The spiral casing welding equipment according to any one of claims 1 to 3, further comprising a locking mechanism provided on the frame body (1) and the positioning and clamping device (3) for locking the horizontal rotation position of the positioning and clamping device (3); the locking mechanism comprises a second telescopic mechanism (38) arranged on the frame body (1) and a locking groove (37) which is arranged on the positioning and clamping device (3) and matched with the second telescopic mechanism (38).

8. The spiral casing welding apparatus as recited in any of claims 1-3, characterized in that the outer pressure mechanism (33) comprises a pressure plate (331) and a third telescoping mechanism (332) connected to the pressure plate (331) and driving the pressure plate (331) to move relative to the inner support mechanism (32).