Metal welding machining platform for engineering machinery

Abstract

The invention relates to the technical field of welding machining, in particular to an engineering machinery metal welding machining platform which comprises a base and a workbench arranged above the base, a circular truncated cone is fixed above the workbench, four U-shaped frames are arranged above the circular truncated cone around the axis of the circular truncated cone in an array mode, and a driving mechanism is arranged in the circular truncated cone. The driving mechanism is used for driving the four U-shaped frames to synchronously move in the radial direction of the circular truncated cone in the two directions, and each U-shaped frame is sequentially provided with three movable bases from top to bottom. The driving mechanism can drive the four U-shaped frames to bidirectionally and synchronously move in the radial direction of the circular truncated cone, so that the first arc-shaped abutting head and the second arc-shaped abutting head can support a workpiece from the inner side or the outer side, self-centering type positioning is achieved, the differentiated requirements of different welding technologies for supporting and positioning the inner side and the outer side are met, and the welding quality is improved. The first arc-shaped abutting head, the second arc-shaped abutting head and the supporting plate can be adjusted in the radial direction and the axial direction of the circular truncated cone so as to adapt to workpieces of various shapes and sizes, and universality is high.

Description

Technical Field

[0001] The present invention relates to the technical field of welding processing, and specifically to a metal welding processing platform for construction machinery. Background Art

[0002] Construction machinery is assembled from different components, and the assembly methods include welding and fixing. When welding and fixing the components of construction machinery, in order to ensure the accuracy of the assembly position, it is usually necessary to use a welding processing table with a positioning effect on the components for auxiliary welding. Currently, when welding circular hollow tubular components of construction machinery on the market, positioning support components are mainly used to position and pair two workpieces to be welded.

[0003] The welding processes of different welded parts are different. Due to the welding position, connection form or component characteristics of some welded parts, it is necessary to support and position from the outside, while for some welded parts, due to internal structure requirements, welding operation space limitations or avoiding external marks and other factors, it is necessary to support and position from the inside, thus forming different process requirements for different support methods. Most of the support components on traditional welding processing tables support and position the workpieces to be welded from the inside, and cannot flexibly switch the internal and external support and positioning methods according to the welding process differences, resulting in poor positioning adaptability when facing circular hollow tubular components with different structures and process requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a metal welding processing platform for construction machinery that can position the workpiece from the outside or the inside, so as to solve the technical problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions.

[0006] A metal welding processing platform for construction machinery includes a base and a workbench arranged above the base. A round table is fixed above the workbench, and four U-shaped frames are arranged in an array around its axis above the round table. A driving mechanism is arranged inside the round table, and the driving mechanism is used to drive the four U-shaped frames to move synchronously in a two-way manner along the radial direction of the round table. Three movable seats are successively arranged on each U-shaped frame from top to bottom, and each movable seat can be adjusted in height and translated along the radial direction of the round table.

[0007] A first rod body is fixed to the top of the lower movable seat, a second rod body is fixed to the top of the upper movable seat, and a support plate is fixed to the top of the middle movable seat. The first rod body and the second rod body both extend along the radial direction of the round table. First arc-shaped contact heads are respectively fixed to both ends of the first rod body, and second arc-shaped contact heads are respectively fixed to both ends of the second rod body. The support plate is used to contact and support between the upper workpiece to be welded and the lower workpiece to be welded to form a reserved gap.

[0008] Preferably, the driving mechanism includes a first driving motor, a bevel gear ring, a first threaded rod, bevel gears, and nut seats. The frustum is provided with an inner cavity, and four sliding grooves are arranged in a circular array around the inner cavity. The first driving motor is fixed to the bottom of the workbench through a fixed seat. A shaft rod is fixed to the output shaft of the first driving motor through a coupling. The shaft rod vertically penetrates and extends into the inner cavity, and a disk is fixed to the bottom end. The bevel gear ring is fixed above the disk.

[0009] A first threaded rod extending radially along the frustum is rotatably installed in each sliding groove. One end of each first threaded rod penetrates and extends into the sliding groove, and a bevel gear is fixed to each. Each bevel gear is correspondingly engaged with the bevel gear ring. A nut seat is slidably installed in a limited manner in each sliding groove. Each nut seat is respectively sleeved on the corresponding first threaded rod in a threaded matching manner. Each U-shaped frame is fixed to the top of the corresponding nut seat.

[0010] Preferably, vertically extending slide rails are fixed to both inner side walls of the U-shaped frame. Three mounting seats are slidably installed between the two slide rails in sequence from top to bottom. Each movable seat is installed on the corresponding mounting seat. A second driving motor is installed on the side of each mounting seat. A driving gear is fixed to the output shaft of each second driving motor. Vertically extending racks are fixed to the side of each U-shaped frame. Each driving gear is correspondingly engaged with the rack.

[0011] Preferably, a guide seat extending radially along the frustum is fixed to each mounting seat. A second threaded rod is rotatably installed in the driving groove of each guide seat. The movable seat is sleeved on the corresponding second threaded rod through the threaded hole thereon in a threaded matching manner and is in sliding fit with the inner wall of the driving groove. A driving motor is fixed to one side of each guide seat. The output shafts of the driving motors are respectively fixedly connected to one end of the corresponding second threaded rod.

[0012] Preferably, a vertical frame is fixed to the workbench. A suspension is fixed to the top end of the vertical frame. A smoke suction hood is fixedly installed through the suspension. The inner diameter of the smoke suction hood becomes larger downward, and a smoke suction pipe is connected to the top. The end of the smoke suction pipe is connected to a welding fume purifier.

[0013] Preferably, an annular seat surrounding the frustum is fixed above the workbench on the periphery of the frustum. An annular cavity surrounding the frustum is provided in the annular seat. An air inlet cylinder communicating with the annular cavity is fixed to the side of the annular seat. A fan for sucking and introducing external air into the annular cavity is installed in the air inlet cylinder. A plurality of air blowing ports communicating with the annular cavity are evenly distributed around the frustum on the top of the annular seat. The air blowing ports are used to blow the air flow upward to form a circular wind field surrounding the upper workpiece to be welded and the lower workpiece to be welded and flowing upward.

[0014] Preferably, a guide air pipe communicating with the annular cavity is fixed to the inner edge wall of the annular seat. The other end of the guide air pipe penetrates and extends to the top of the frustum, and a funnel-shaped air expansion port is provided to form an upward air flow inside the upper workpiece to be welded and the lower workpiece to be welded.

[0015] Preferably, a plurality of fan-shaped bars are fixed on the top end surface of the annular seat in a circular array around the truncated cone, each fan-shaped bar is provided with a blowing port communicated with the annular cavity, each fan-shaped bar is arranged to be inclined toward the axis of the truncated cone, and each blowing port has the same inclination as the fan-shaped bar, so that the boundary of the circular wind field becomes smaller as it goes upwards.

[0016] Preferably, both sides of each blowing port are provided with guide slopes with a spacing increasing upwards, so that the airflow ejected from the blowing port spreads upwards in a fan shape.

[0017] Preferably, both ends of the support plate have support parts, and the two support parts are wedge-shaped with sharp corners.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0019] The present invention can drive the four U-shaped frames to move synchronously in both directions along the radial direction of the truncated table through a driving mechanism, so that the first arc-shaped contact head and the second arc-shaped contact head can support the workpiece from the inside or the outside, realize self-centering positioning, and meet the differentiated requirements of different welding processes for inner and outer support positioning. The first arc-shaped contact head, the second arc-shaped contact head and the support plate can be adjusted respectively in the radial and axial directions of the truncated table to adapt to workpieces of various shapes and sizes, and have high versatility.

[0020] The invention forms a reserved gap between the upper and lower parts to be welded by supporting the support plate, which can ensure that the welding rod and the welding wire can smoothly penetrate into the root of the weld to achieve root penetration, thereby improving the strength and sealing of the weld joint and avoiding quality defects such as incomplete penetration and slag inclusion. At the same time, the reserved gap provides a buffer space for the cooling and shrinkage of the weld metal during the welding process, effectively reducing welding stress and deformation, and cooperating with the centering and positioning mechanism, it can ensure that the two workpieces maintain high coaxiality after welding.

[0021] The two ends of the support plate have support parts with gradually changing thickness. Combined with the characteristic that the support plate can be adjusted translationally, the size of the reserved gap between the upper and lower parts to be welded can be adjusted to meet the requirements of diversified welding processes.

[0022] The present invention uses a fan to draw external air into the annular cavity, and sprays it upward through the blowing port to form a circular wind field surrounding the workpiece. At the same time, the air guide pipe and the air expansion port form an upward airflow inside the workpiece. The internal and external airflows work together to form a three-dimensional wind field. The boundary of the circular wind field becomes smaller and fan-shaped as it spreads upward, which can effectively cover the welding area and guide the smoke to the smoke hood to avoid overflow. The upward airflow assists the smoke to be discharged from the inside, and cooperates with the gradual expansion structure of the smoke hood to enhance the suction effect.

[0023] In addition, the air flow can assist in cooling the welding point, accelerate the cooling of the weld, and improve the structure of the heat-affected zone. At the same time, the annular structure of the annular seat can block the splashing of welding chips, taking into account both environmental protection and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the workbench in the present invention;

[0026] Figure 3 for Figure 2 A schematic diagram of a local structure of the structure shown;

[0027] Figure 4 It is a schematic diagram of the local structure of the top of the placement table in the present invention;

[0028] Figure 5 It is a schematic diagram of the driving mechanism structure in the present invention;

[0029] Figure 6 It is a schematic diagram of the structure on the U-shaped frame in the present invention;

[0030] Figure 7 It is a schematic diagram of the installation of the movable seat structure in the present invention;

[0031] Figure 8 for Figure 3 A schematic cross-sectional view of the structure shown;

[0032] Figure 9 It is a schematic diagram of the local structure of one of the fan-shaped strips on the annular seat in the present invention;

[0033] Figure 10 for Figure 9 A schematic cross-sectional view of the structure shown;

[0034] Figure 11 This is a schematic diagram of the collision positioning of two workpieces from the outside;

[0035] Figure 12 It is a schematic diagram of the collision positioning of two workpieces from the inside;

[0036] Figure 13 Schematic diagram of smoke collection airflow.

[0037] In the figure: 01, upper workpiece to be welded; 02, lower workpiece to be welded; 03, reserved gap; 04, circular air field; 05, upward air flow; 1, workbench; 101, chip discharge port; 11, base; 12, vertical frame; 13, suspension; 14, fume hood; 15, fume pipe; 2, frustum; 21, inner cavity; 22, chute; 3, drive mechanism; 31, disc; 32, fixed seat; 33, first drive motor; 331, shaft rod; 34, bevel gear ring; 35, first threaded rod; 36, bevel gear; 37, nut seat; 4, U-shaped frame; 41, slide rail; 42, rack; 5, mounting seat; 51, second drive motor; 52, drive gear; 53, guide seat; 531, drive groove; 54, second threaded rod; 55, drive motor; 56, movable seat; 6, first rod; 61, first arc-shaped contact head; 7, second rod; 71, second arc-shaped contact head; 8, support plate; 81, support part; 9, annular seat; 91, annular cavity; 92, air inlet tube; 93, fan; 94, air outlet; 941, diversion inclined plane; 95, air duct; 96, expansion air outlet; 97, fan-shaped strip. Detailed implementation mode

[0038] Please refer to Figures 1 - 13 , the present invention provides a metal welding processing platform for construction machinery. The embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

[0039] Embodiment 1

[0040] Please refer to Figures 1 - 7 , the metal welding processing platform includes a base 11 and a workbench 1 arranged above the base 11. A frustum 2 is fixed above the workbench 1. Four U-shaped frames 4 are arranged in an array around the axis of the frustum 2 above the frustum 2, and the U-shaped frames 4 are equidistantly arranged. A drive mechanism 3 is arranged in the frustum 2. The drive mechanism 3 is used to drive the four U-shaped frames 4 to move synchronously in a two-way manner along the radial direction of the frustum 2, that is, the drive mechanism 3 can drive each U-shaped frame 4 to move back and forth along the radial direction of the frustum 2, and the moving amounts of the four U-shaped frames 4 are synchronous.

[0041] Three movable seats 56 are sequentially arranged on each U-shaped frame 4 from top to bottom. Among them, the top of the lowermost movable seat 56 is fixed with a first rod 6, and the top of the upper movable seat 56 is fixed with a second rod 7. The first rod 6 and the second rod 7 both extend along the radial direction of the frustum 2. First arc-shaped contact heads 61 are respectively fixed at both ends of the first rod 6, and second arc-shaped contact heads 71 are respectively fixed at both ends of the second rod 7.

[0042] As Figure 11As shown in the figure, when it is necessary to support and position the upper workpiece to be welded 01 and the lower workpiece to be welded 02 from the outside, the lower workpiece to be welded 02 is vertically placed on the frustum 2, and the upper workpiece to be welded 01 is vertically placed above the lower workpiece to be welded 02, and it is ensured that the lower workpiece to be welded 02 is inside the four first arc-shaped contact heads 61 on the inner side, and the upper workpiece to be welded 01 is inside the four second arc-shaped contact heads 71 on the inner side.

[0043] Subsequently, by the operation of the driving mechanism 3, the four U-shaped frames 4 are respectively driven to move closer to the axis of the frustum 2. Finally, the four inner first arc-shaped contact heads 61 move convergently towards the axis of the frustum 2 and respectively contact the outer wall of the lower workpiece to be welded 02 from the outside, realizing the centering positioning of the lower workpiece to be welded 02. At the same time, the four inner second arc-shaped contact heads 71 move convergently towards the axis of the frustum 2 and respectively contact the outer wall of the upper workpiece to be welded 01 from the outside, realizing the centering positioning of the upper workpiece to be welded 01.

[0044] When both the upper workpiece to be welded 01 and the lower workpiece to be welded 02 are centered and positioned, the bottom end of the upper workpiece to be welded 01 and the top of the lower workpiece to be welded 02 are automatically aligned, completing the positioning work before welding, and thus ensuring the welding position accuracy.

[0045] As Figure 12 shown in the figure, when it is necessary to support and position the upper workpiece to be welded 01 and the lower workpiece to be welded 02 from the inside, the lower workpiece to be welded 02 is vertically placed on the frustum 2, and the upper workpiece to be welded 01 is vertically placed above the lower workpiece to be welded 02, and it is ensured that both the upper workpiece to be welded 01 and the lower workpiece to be welded 02 are sleeved outside the four U-shaped frames 4.

[0046] Subsequently, by the operation of the driving mechanism 3, the four U-shaped frames 4 are respectively driven to move in a divergent manner towards the side away from the axis of the frustum 2. Finally, the four outer first arc-shaped contact heads 61 respectively contact the inner wall of the lower workpiece to be welded 02 from the inside, realizing the centering positioning of the lower workpiece to be welded 02. At the same time, the four outer second arc-shaped contact heads 71 respectively contact the inner wall of the upper workpiece to be welded 01 from the inside, realizing the centering positioning of the upper workpiece to be welded 01.

[0047] When both the upper workpiece to be welded 01 and the lower workpiece to be welded 02 are centered and positioned, the bottom end of the upper workpiece to be welded 01 and the top of the lower workpiece to be welded 02 are automatically aligned, completing the positioning work before welding, and thus ensuring the welding position accuracy.

[0048] It can be seen that by arranging the first arc-shaped abutting head 61 and the second arc-shaped abutting head 71 on the U-shaped frame 4 and setting the driving mechanism 3 to translate and adjust the U-shaped frame 4 along the radial direction of the frustum 2, this metal welding processing platform can be used to support and position the upper workpiece to be welded 01 and the lower workpiece to be welded 02 from the inside, and can also support and position the upper workpiece to be welded 01 and the lower workpiece to be welded 02 from the outside, meeting the welding requirements of different structures and processes.

[0049] In addition, whether supporting and positioning the upper workpiece to be welded 01 and the lower workpiece to be welded 02 from the inside or from the outside, the moving amounts of the corresponding first arc-shaped abutting head 61 and the second arc-shaped abutting head 71 are the same, realizing the self-centering of the lower workpiece to be welded 02 and the upper workpiece to be welded 01. The centering type positioning can accurately position the upper workpiece to be welded 01 and the lower workpiece to be welded 02 at the positions required for welding, making the position deviation between the welding part and the welding head small, ensuring the accuracy and consistency of welding, helping to improve the welding quality, and the centering type positioning is realized by the abutting and limiting of the first arc-shaped abutting head 61 and the second arc-shaped abutting head 71, without relying on the operation skills and experience of the staff.

[0050] On the basis of the radial movement of the U-shaped frame 4 along the frustum 2, each movable seat 56 can also be adjusted independently in terms of lifting and translation along the radial direction of the frustum 2, so that each first arc-shaped abutting head 61 and the second arc-shaped abutting head 71 can not only be adjusted translationally along the radial direction of the frustum 2 to adapt to the radial dimensions of the workpiece, but also be adjusted to move along the axial direction of the frustum 2 to adapt to the axial height of the workpiece, with high versatility.

[0051] Please refer to Figure 6 , a support plate 8 is fixed to the top of the middle movable seat 56, and the support plate 8 is used to abut and support between the upper workpiece to be welded 01 and the lower workpiece to be welded 02 to form a reserved gap 03.

[0052] As Figure 11 and Figure 12 shown, when abutting and supporting and positioning the upper workpiece to be welded 01 and the lower workpiece to be welded 02 from the outside or from the inside, the support plate 8 is adjusted and extended to the position between the bottom end of the upper workpiece to be welded 01 and the top end of the lower workpiece to be welded 02, and the support plate 8 is used to support between the upper workpiece to be welded 01 and the lower workpiece to be welded 02 to form a reserved gap 03 that penetrates the inside and outside. Through the reserved gap 03, the welding rod and welding wire can smoothly penetrate into the root of the weld, realizing root penetration welding, greatly improving the strength and sealing performance of the welding joint, avoiding quality problems such as incomplete penetration and slag inclusion caused by direct contact between the two workpieces. At the same time, the reserved gap 03 provides a buffer space for the shrinkage stress generated by the cooling of the weld metal during welding, reducing the welding stress and deformation, and ensuring the high coaxiality of the upper workpiece to be welded 01 and the lower workpiece to be welded 02.

[0053] By utilizing the characteristics of the lifting adjustment of each movable seat 56 and the radial translation adjustment along the frustum 2, the support plate 8 can be translated and adjusted radially and axially along the frustum 2 respectively to adapt to workpieces of different sizes.

[0054] In addition, both ends of the support plate 8 are provided with support portions 81. The two support portions 81 are in the shape of wedge-shaped sharp corners, and the thickness at the support portions 81 gradually changes. Combining with the radial translation adjustment of the support plate 8 along the frustum 2, the size of the formed reserved gap 03 can be adjusted to meet the requirements of different welding processes.

[0055] It should be noted that during welding, first is spot welding, and the welding points are evenly distributed. After that, the support plate 8 is withdrawn from the reserved gap 03, and then full welding can be carried out to avoid the support plate 8 causing obstruction and interference to the welding.

[0056] Please refer to Figure 4 and Figure 5 As shown in FIGS. and, the driving mechanism 3 includes a first driving motor 33, a bevel gear ring 34, a first threaded rod 35, a bevel gear 36 and a nut seat 37. The frustum 2 is provided with an inner cavity 21. Four sliding grooves 22 are arranged in a circular array around the inner cavity 21 of the frustum 2. The first driving motor 33 is fixed to the bottom of the workbench 1 through a fixing seat 32. A shaft rod 331 is fixed to the output shaft of the first driving motor 33 through a coupling. The shaft rod 331 vertically penetrates and extends into the inner cavity 21, and a disc 31 is fixed to the bottom end. The bevel gear ring 34 is fixed above the disc 31.

[0057] A first threaded rod 35 extending radially along the frustum 2 is rotatably installed in each sliding groove 22. One end of each first threaded rod 35 penetrates and extends into the sliding groove 22, and a bevel gear 36 is fixed to each. Each bevel gear 36 is correspondingly meshed with the bevel gear ring 34. A nut seat 37 is slidably installed in a limited manner in each sliding groove 22. Each nut seat 37 is respectively sleeved on the corresponding first threaded rod 35 in a thread-matching manner. Each U-shaped frame 4 is fixed to the top of the corresponding nut seat 37.

[0058] By the operation of the first driving motor 33, its output shaft drives the disc 31 and the bevel gear ring 34 to rotate under the connection of the shaft rod 331. The rotating bevel gear ring 34 meshes and drives each bevel gear 36 and drives the corresponding first threaded rod 35 to rotate. The rotating first threaded rod 35 thread-drives the corresponding nut seat 37 to slide along the inner wall of the sliding groove 22, thus realizing the radial translation adjustment of each U-shaped frame 4 along the frustum 2 and ensuring that the adjustment amounts of each U-shaped frame 4 are consistent.

[0059] Please refer to Figure 6 and Figure 7, on the inner side walls of the U-shaped frame 4, there are vertically extending slide rails 41 fixed. Between the two slide rails 41, three mounting seats 5 are slidably installed in sequence from top to bottom. Each movable seat 56 is respectively installed on the corresponding mounting seat 5. On the side of each mounting seat 5, a second driving motor 51 is installed. On the output shafts of the second driving motors 51, driving gears 52 are fixed. On the side of each U-shaped frame 4, there are vertically extending racks 42 fixed. Each driving gear 52 is respectively meshed with the corresponding rack 42.

[0060] On each mounting seat 5, there is a guide seat 53 extending radially along the frustum 2 fixed. In the driving groove 531 of each guide seat 53, a second threaded rod 54 is rotatably installed. The movable seat 56 is threadedly sleeved on the corresponding second threaded rod 54 through the threaded hole thereon and is in sliding fit with the inner wall of the driving groove 531. On one side of each guide seat 53, a driving motor 55 is fixed. The output shafts of the driving motors 55 are respectively fixedly connected to one end of the corresponding second threaded rod 54.

[0061] By the operation of the second driving motor 51 to drive the driving gear 52 to rotate, under the meshing transmission of the driving gear 52 and the rack 42, the mounting seat 5 can be driven to perform lifting adjustment along the slide rail 41, providing the ability of lifting adjustment for the first arc-shaped abutting head 61, the second arc-shaped abutting head 71 and the support plate 8.

[0062] By the operation of the driving motor 55, its output shaft drives the second threaded rod 54 to rotate. The second threaded rod 54 threadedly drives the movable seat 56 to slide and adjust along the inner wall of the driving groove 531, providing the ability of horizontal adjustment for the first arc-shaped abutting head 61, the second arc-shaped abutting head 71 and the support plate 8.

[0063] Among them, the second driving motor 51 adopts a worm and worm gear reduction motor, which has a self-locking effect, helps to maintain the height of the mounting seat 5, and at the same time has a certain load-bearing capacity.

[0064] In addition, the bottom of the chute 22 penetrates through to the bottom of the workbench 1. When the welding chips fall into the chute 22, they can be directly discharged from the bottom of the chute 22. The welding chips falling on the second threaded rod 54 can automatically fall as the second threaded rod 54 rotates, and will not affect the meshing drive of the second threaded rod 54 and the movable seat 56.

[0065] Embodiment 2

[0066] Please refer to Figure 1 、 Figure 2 、 Figure 3 、and Figure 8 This embodiment is different from Embodiment 1 in that:

[0067] A vertical stand 12 is fixed on the workbench 1. At the top of the vertical stand 12, a suspension bracket 13 is fixed. A fume hood 14 is fixedly installed through the suspension bracket 13. The inner diameter of the fume hood 14 becomes larger downward, and a suction pipe 15 is connected to the top. The end of the suction pipe 15 is connected to a welding fume purifier, which is not shown in the figure.

[0068] The negative pressure suction effect generated by the operation of the welding fume purifier can suck the welding fumes from the fume hood 14 and the suction pipe 15 into the purification chamber for purification treatment, ensuring the air quality at the welding site.

[0069] Above the workbench 1 and around the periphery of the frustum 2, an annular seat 9 is fixed. The annular seat 9 has an annular cavity 91 distributed around the frustum 2. On the side of the annular seat 9, an air inlet duct 92 is fixed and communicated with the annular cavity 91. A fan 93 for sucking external air into the annular cavity 91 is installed in the air inlet duct 92. Among them, the rotation speed of the fan 93 is adjustable.

[0070] A plurality of air outlets 94 communicated with the annular cavity 91 are evenly distributed around the frustum 2 on the top of the annular seat 9. The air outlets 94 are used to blow out the air flow upward to form a circular wind field 04 that surrounds the upper workpiece to be welded 01 and the lower workpiece to be welded 02 and flows upward.

[0071] As Figure 13 shown, by the operation of the fan 93, the external air is sucked from the air inlet duct 92 into the annular cavity 91 and blown out upward by each air outlet 94 to form an upward flowing circular wind field 04 around the upper workpiece to be welded 01 and the lower workpiece to be welded 02, providing a wind wall effect flowing towards the fume hood 14, covering the welding area, which is beneficial to guiding the welding fumes towards the fume hood 14, avoiding the fume dispersion, and improving the fume removal effect.

[0072] As Figure 9 shown, a plurality of sector bars 97 are fixedly arranged in an annular array around the frustum 2 on the top end surface of the annular seat 9. Each sector bar 97 is provided with an air outlet 94 communicated with the annular cavity 91. Each sector bar 97 is arranged in an inclined shape towards the axis of the frustum 2. As Figure 10 shown, the included angle between the sector bar 97 and the top end of the annular seat 9 is defined as R, where 75° ≤ R ≤ 85°. In this application, R is preferably 80°, and the inclination of each air outlet 94 is the same as that of the sector bar 97, so that the boundary of the circular wind field 04 becomes smaller upward.

[0073] In addition, on both sides of each air outlet 94, there are diversion inclined surfaces 941 with an increasing distance upward, so that the air flow ejected from the air outlet 94 diffuses upward in a fan shape.

[0074] By setting the sector bar 97 and the air outlet 94 obliquely, the boundary of the formed circular air field 04 becomes smaller upwards, so that when the circular air field 04 deflects the soot upwards to the circular air field 04, the circular air field 04 is sufficient to cover the circular air field 04. At the same time, due to the diversion inclined planes 941 on both sides of the air outlet 94, the air flow ejected from the air outlet 94 diffuses upwards in a fan shape, thereby ensuring that the air flows blown out by two adjacent air outlets 94 complement each other, ensuring the integrity of the U-shaped frame 4 and effectively improving the soot capture effect.

[0075] Combined with Figure 8 and Figure 11 As shown, a duct 95 communicating with the annular cavity 91 is fixed on the inner edge wall of the annular seat 9. The other end of the duct 95 penetrates through and extends to the top of the frustum 2, and a funnel-shaped diffuser 96 is provided to form an upward air flow 05 inside the upper workpiece to be welded 01 and the lower workpiece to be welded 02.

[0076] Part of the air flow in the annular cavity 91 flows into the duct 95 and diffuses upwards and ejects inside the workpiece through the diffuser 96, forming an upward air flow 05. Cooperating with the circular air field 04, it forms a coordinated smoke removal operation of internal and external air flows, and the smoke removal effect is better. At the same time, the circular air field 04 flows upwards outside the workpiece and cooperates with the upward air flow 05 flowing upwards inside the workpiece, which can play an auxiliary air cooling effect on the welding part, killing two birds with one stone.

[0077] In addition, the annular seat 9 is arranged around the frustum 2, which can prevent the welding chips from splashing outwards. An annular welding chip collection cavity is formed between the annular seat 9 and the frustum 2. A number of chip discharge ports 101 communicating with the annular welding chip collection cavity are evenly distributed on the workbench 1, facilitating the discharge of the intercepted and collected welding chips below the workbench 1.

[0078] In addition, it is worth noting that the present invention is positioned by using the first arc-shaped abutting head 61 and the second arc-shaped abutting head 71 to abut and support, and the support plate 8 is used to support and leave a gap between the two workpieces. Combining the adjustable positions of the first arc-shaped abutting head 61, the second arc-shaped abutting head 71 and the support plate 8, it is not only applicable to the combined welding of two circular hollow tubular workpieces, but also applicable to the combined welding of two rectangular hollow workpieces and the combined welding of a rectangular hollow workpiece and a circular hollow tubular workpiece. In addition, it can also be applicable to the gradually changing sizes of the workpieces, with high versatility.

[0079] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms.

Claims

1. A metal welding processing platform for engineering machinery, comprising a base (11) and a workbench (1) arranged above the base (11), characterized in that: A round table (2) is fixed above the workbench (1), and four U-shaped frames (4) are arranged in an array around the axis of the round table (2); A driving mechanism (3) is provided inside the truncated table (2), and the driving mechanism (3) is used to drive the four U-shaped frames (4) to respectively move in a bidirectional and synchronous manner along the radial direction of the truncated table (2); Each of the U-shaped frames (4) is provided with three movable seats (56) in sequence from top to bottom, and each of the movable seats (56) can be adjusted in a lifting and lowering manner and in a radial translational manner along the truncated table (2); A first rod body (6) is fixed to the top of the lower movable seat (56), a second rod body (7) is fixed to the top of the upper movable seat (56), and a support plate (8) is fixed to the top of the middle movable seat (56); The first rod body (6) and the second rod body (7) both extend radially along the truncated cone (2); first arc-shaped abutting heads (61) are fixed to both ends of the first rod body (6); and second arc-shaped abutting heads (71) are fixed to both ends of the second rod body (7); The support plate (8) is used to abut and support between the upper part to be welded (01) and the lower part to be welded (02) to form a reserved gap (03).

2. The metal welding processing platform for engineering machinery according to claim 1, characterized in that: The driving mechanism (3) comprises a first driving motor (33), a bevel gear ring (34), a first threaded rod (35), a bevel gear (36) and a nut seat (37); An inner cavity (21) is provided in the truncated table (2), and four sliding grooves (22) are arranged in a circular array around the inner cavity (21) on the truncated table (2); The first drive motor (33) is fixed to the bottom of the workbench (1) via a fixing seat (32), and a shaft (331) is fixed to the output shaft of the first drive motor (33) via a coupling; The shaft (331) vertically extends through the inner cavity (21), and a disc (31) is fixed to the bottom end, and the conical gear ring (34) is fixed above the disc (31); The first threaded rod (35) extending radially along the truncated table (2) is rotatably mounted in each of the slide grooves (22); one end of each of the first threaded rods (35) extends through the slide groove (22) and is fixed with the bevel gear (36); each of the bevel gears (36) is meshed with the bevel gear ring (34) correspondingly; A nut seat (37) is slidably mounted in each of the slide grooves (22), and each of the nut seats (37) is thread-matched and sleeved on the corresponding first threaded rod (35); Each of the U-shaped frames (4) is fixed on the top of the corresponding nut seat (37).

3. The metal welding processing platform for engineering machinery according to claim 1, characterized in that: Vertically extending slide rails (41) are fixed to both inner side walls of the U-shaped frame (4), three mounting seats (5) are slidably mounted in sequence from top to bottom between the two slide rails (41), and each movable seat (56) is mounted on a corresponding mounting seat (5); A second drive motor (51) is mounted on the side of each mounting seat (5), and a drive gear (52) is fixed on the output shaft of the second drive motor (51); A vertically extending rack (42) is fixed to the side of each of the U-shaped frames (4); Each of the driving gears (52) is respectively meshed with the rack (42).

4. The metal welding processing platform for engineering machinery according to claim 3, characterized in that: A guide seat (53) extending radially along the truncated table (2) is fixed on each of the mounting seats (5), and a second threaded rod (54) is rotatably mounted in a driving groove (531) on each of the guide seats (53); The movable seat (56) is sleeved onto the corresponding second threaded rod (54) through the threaded matching of the screw hole thereon, and is slidably fitted with the inner wall of the driving groove (531); A driving motor (55) is fixed on one side of the guide seat (53), and an output shaft of the driving motor (55) is fixedly connected to one end of the second threaded rod (54) respectively.

5. The metal welding processing platform for engineering machinery according to claim 4, characterized in that: A stand (12) is fixed on the workbench (1), a suspension (13) is fixed on the top of the stand (12), and a smoking hood (14) is fixedly installed on the suspension (13) in a penetrating manner; The inner diameter of the smoking hood (14) increases as it goes downwards, and the top is connected to a smoking pipe (15); The end of the smoking pipe (15) is connected to a welding fume purifier.

6. The metal welding processing platform for engineering machinery according to claim 5, characterized in that: An annular seat (9) distributed around the truncated cone (2) is fixed above the workbench (1) and located at the periphery of the truncated cone (2), and an annular cavity (91) distributed around the truncated cone (2) is provided in the annular seat (9); An air inlet cylinder (92) in communication with the annular cavity (91) is fixed to the side of the annular seat (9), and a fan (93) for sucking external air into the annular cavity (91) is installed in the air inlet cylinder (92); A plurality of air blowing ports (94) are evenly distributed around the truncated cone (2) on the top of the annular seat (9), each of which is in communication with the annular cavity (91). The air blowing ports (94) are used to blow air upwards to form a circular wind field (04) surrounding the upper part to be welded (01) and the lower part to be welded (02) and flowing upwards.

7. The metal welding processing platform for engineering machinery according to claim 6, characterized in that: An air guide pipe (95) communicating with the annular cavity (91) is fixed on the inner edge wall of the annular seat (9); The other end of the air guide pipe (95) extends through the top of the truncated cone (2) and is provided with a funnel-shaped air expansion port (96) to form an upward airflow (05) inside the upper part to be welded (01) and the lower part to be welded (02).

8. The metal welding processing platform for engineering machinery according to claim 6, characterized in that: A plurality of fan-shaped strips (97) are fixed in a circular array around the truncated cone (2) on the top end surface of the annular seat (9), and each of the fan-shaped strips (97) is provided with an air outlet (94) that is in communication with the annular cavity (91); Each of the fan-shaped strips (97) is arranged in an inclined shape toward the axis of the truncated cone (2), and each of the air outlets (94) has the same inclination as the fan-shaped strip (97), so that the boundary of the circular wind field (04) becomes smaller as it moves upwards.

9. The metal welding processing platform for engineering machinery according to claim 8, characterized in that: Both sides of each of the air blowing ports (94) are provided with guide slopes (941) whose spacing increases upwards, so that the airflow ejected from the air blowing ports (94) spreads upwards in a fan shape.

10. The metal welding processing platform for engineering machinery according to claim 1, characterized in that ； Both ends of the support plate (8) have support portions (81), and the two support portions (81) are wedge-shaped with pointed corners.

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