Numerical control four-corner welding machine with upper and lower V-shaped welding seams and arc-shaped outer corners

Abstract

The utility model provides a numerical control four-corner welding machine with upper and lower V-shaped welding seams and arc-shaped outer corners, which belongs to the field of plastic steel welding machines, and comprises a lathe bed, a left cross beam and a right cross beam which are parallel to each other are connected onto the lathe bed, two ends of the left cross beam are respectively connected with a machine head, two ends of the right cross beam are respectively connected with a machine head, and the four groups of machine heads can slide along the Y direction; the machine head comprises a machine head bottom plate, two pressing assemblies are symmetrically arranged on the machine head bottom plate, and a positioning assembly is slidably connected between the two pressing assemblies in the Z direction. A heating assembly is arranged on the machine head bottom plate and can be used for heating and melting the sectional material fixed by the pressing assembly; a milling assembly is further arranged on the machine head bottom plate; the left cross beam and the right cross beam are further provided with a feeding assembly for conveying the sectional materials to move in the Y direction. Through the cooperation of the pressing assembly and the positioning assembly, welding seams of the upper plane and the lower plane are small V-shaped concave faces during welding, little welding slag is generated, the welding seams are uniform and attractive, and the machining efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plastic steel welding machine, more particularly to a numerical control four corner welding machine of upper and lower V type welding seam and outer angle arc type. BACKGROUND

[0002] With the development of real estate, in the construction of houses, in order to more efficient and safe installation of doors and windows, usually better cost-effective plastic steel doors and windows are used for door and window construction of houses, so that the demand for plastic steel doors and windows is greatly improved, in order to effectively improve the production efficiency of plastic steel doors and windows, manufacturers usually use special plastic steel door and window welding machine for the final welding assembly of plastic steel door and window frame.

[0003] At present, in the welding process of plastic doors and windows, there are two welding forms, one is seamless welding form, and the other is seam welding form, the current welding seam is 3mm, 2mm welding

[0004] 3mm and 2mm welding seam, after welding, it is necessary to use an angle cleaning machine to clean the welding seam, and it must be processed on two devices, and the welding quality and the height difference of the profile are defective, the problems of the upper and lower planes reflected on the angle cleaning machine are: 1) the welding seam cleaned on the upper and lower planes is too wide, which is 3mm or 2mm, and it is not beautiful, 2) especially for the colored profile of film covering and co-extrusion, the colored part is cleaned off after cleaning, and the white base material is exposed, which needs to be painted with a paint color similar to the colored profile; 3) the height difference of the profile defect leads to uneven cleaning of the welding seam; 4) multiple devices are used for processing, which increases the investment in equipment and also occupies a large amount of labor, and the processing efficiency is low.

[0005] The welding seam cleaning of seamless welding is a blade shearing type, and when welding to the end, the blade shears off the welding seam on the upper and lower planes, and the efficiency is high, but the disadvantages of this welding method are: 1) the corner strength of the welding angle is not high, about 1800-2200kN, which cannot be accepted by enterprises with high requirements for plastic steel doors and windows; 2) the shearing blade shearing type has rigid contact, and the blade needs to be replaced after 2-3 months to achieve better shearing effect. INVENTION CONTENTS

[0006] In order to solve the problems in the prior art, a numerical control four corner welding machine of upper and lower V type welding seam and outer angle arc type is proposed.

[0007] The utility model discloses a technical scheme for solving technical problems: a numerical control four corner welding machine of upper and lower V-shaped welding seam and outer angle arc type, including the body, the body is connected with the left crossbeam and right crossbeam who are parallel, and the left crossbeam and right crossbeam can slide along the X direction, the both ends of left crossbeam are connected with a machine head respectively, and the both ends of right crossbeam are also connected with a machine head respectively, and four groups of machine heads can slide along the Y direction, the machine head includes the machine head bottom plate, and two pressure assembly are arranged on the machine head bottom plate symmetrically, and the positioning assembly is slidably connected between two pressure assembly along the Z direction, and the positioning assembly can be from the top surface and bottom surface of section bar, the machine head bottom plate is equipped with heating assembly, and the section bar fixed by pressure assembly can be heated and melted, the machine head bottom plate is also equipped with milling assembly, and the welding slag can be milled, and the feeding assembly that the section bar is conveyed and moves along the Y direction is also equipped on the left crossbeam and right crossbeam.

[0008] Preferably, the two pressure assemblies are arranged perpendicular to each other, and the two pressure assemblies form an L-shaped structure; the pressure assembly comprises an upper pressing clamp and a lower pressing clamp; the lower pressing clamp is connected with a first guide block at the bottom, and a work advancing guide rail is connected to the machine head bottom plate correspondingly; a work advancing cylinder is fixedly connected to the machine head bottom plate, and the extension end of the work advancing cylinder is connected with the lower pressing clamp to drive the lower pressing clamp and the first guide block to slide along the work advancing guide rail; a vertical column is connected to one side of the lower pressing clamp, and a pressing connecting plate is connected to the top of the vertical column; a pressing cylinder is fixedly connected to the pressing connecting plate, and the extension end of the pressing cylinder is connected with the upper pressing clamp, so that the upper pressing clamp can move along the Z direction, and the upper pressing clamp and the lower pressing clamp can press the section bar.

[0009] Preferably, a backing plate is connected to the upper pressing clamp, and the inner side of the backing plate is attached to the outer side of the section bar; a material hooking and clamping cylinder is further connected to the side surface of the upper pressing clamp, and the extension end of the material hooking and clamping cylinder is connected with a material hooking and clamping plate; when the upper pressing clamp and the lower pressing clamp press the section bar, the material hooking and clamping plate can move towards the section bar backing plate to horizontally clamp the section bar.

[0010] Preferably, the heating assembly comprises a welding positioning plate, the bottom of the welding positioning plate is connected with a second guide block, a moving guide rail is connected to the machine head bottom plate correspondingly, and the extension end of a moving cylinder fixed to the machine head bottom plate is connected with the welding positioning plate to enable the welding positioning plate to move along the moving guide rail; a welding stand is obliquely arranged on the positioning welding plate, the welding stand is connected with a welding lifting guide rail, and a third guide block is slidably connected to the welding lifting guide rail; a heating plate lifting cylinder is connected to the top of the welding stand, the extension end of the heating plate lifting cylinder is connected with a heating fixing seat, the bottom of the heating fixing seat is connected with the third guide block, and a heating plate is connected to the heating fixing seat.

[0011] Preferably, a rear round corner pressing plate is further slidably connected to the welding positioning plate at the bottom of the heating plate, the rear round corner pressing plate can be pressed at the welding position of the two section bars, the rear round corner pressing plate is connected with a seventh guide block, a feed screw is connected to the welding positioning plate correspondingly, and the rear round corner pressing plate is driven to move along the feed screw by a feed motor on the welding positioning plate.

[0012] Preferably, the milling assembly comprises a milling stand connected to the welding positioning plate, a milling front and rear feed guide connected to the milling stand, a sixth guide block connected to the milling front and rear feed guide, the sixth guide block being driven by a front and rear feed driving cylinder on the milling stand, a sliding seat connected to the sixth guide block, a motor lifting cylinder connected to the sliding seat, a milling motor mounting plate connected to the telescopic end of the motor lifting cylinder, a milling motor connected to the milling motor mounting plate, and a milling cutter connected to the output end of the milling motor.

[0013] Preferably, the positioning assembly comprises an upper positioning plate and a lower positioning plate, the lower positioning plate being vertically and slidably connected to the machine head bottom plate, the top of the lower positioning plate being connected to a lower V-shaped pressing plate, the bottom of the lower positioning plate being connected to a lower pressing plate cylinder, the lower pressing plate cylinder being connected to a positioning cylinder, the positioning cylinder being vertically and slidably connected to the bottom of the machine head bottom plate, and the machine head bottom plate and the positioning cylinder being connected through a positioning connecting pair.

[0014] Preferably, the feeding assembly comprises a feeding belt driven by a feeding driving motor fixed on the left cross beam, a pushing material cylinder connected to the machine head bottom plate, a telescopic end of the pushing material cylinder being connected to a pushing plate, a fourth guide block being connected to the pushing plate, and a pushing guide rail being connected to the machine head base corresponding to the fourth guide block, the fourth guide block and the pushing guide rail being matched to realize guiding, and the pushing plate being capable of pushing the welded profile onto the feeding belt to realize feeding.

[0015] Preferably, the machine head bottom plate is connected to a fifth guide block, the left cross beam and the right cross beam are each connected to a machine head moving guide rail, and the fifth guide block and the machine head moving guide rail are matched to realize the movement of the machine head along the Y direction.

[0016] Compared with the prior art, the above technical scheme has the following advantages or beneficial effects:

[0017] 1. The present utility model realizes that the welding seam on the upper and lower planes is a small V-shaped concave surface during welding through the cooperation of the pressing assembly and the positioning assembly, the generated welding slag is very little, the welding seam is uniform and beautiful, and the processing efficiency is high.

[0018] 2. The present utility model guarantees that the welding surface is difficult to overflow the welding slag through the cooperation of the upper positioning plate and the lower positioning plate and the upper V-shaped pressing plate and the lower V-shaped pressing plate, the strength is greater compared with the operation of cutting the welding seam in seamless welding, the welding seam can be directly used without cleaning, the processing efficiency is improved, and the equipment investment and the occupation of personnel are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings constituting a part of the specification of the present utility model are used to provide a further understanding of the present utility model, the illustrative embodiments of the present utility model and the description thereof are used to explain the present utility model, and do not constitute an improper limitation on the present utility model.

[0020] Figure 1 is the overall structure schematic diagram of the utility model;

[0021] Figure 2 is Figure 1 the enlarged view of A in the middle.

[0022] Figure 3 is the axial side view of the machine head.

[0023] Figure 4 is the right side axial view of the milling assembly and heating assembly part.

[0024] Figure 5 is the left side axial view of the milling assembly and heating assembly part.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, operation box;2, machine head;21, machine head bottom plate;22, work feed guide rail;23, moving guide rail;24, moving cylinder;25, pushing guide rail;26, fifth guide block;27, machine head moving guide rail;3, electric control box;4, bed;41, left cross beam;42, right cross beam;5, profile;6, pressing assembly;61, upper pressing clamp;62, lower pressing clamp;63, first guide block;64, work feed cylinder;65, stand;66, connecting plate;67, pressing cylinder;68, pad block;69, hooking and clamping cylinder;610, hooking and clamping plate;7, positioning assembly;71, lower positioning plate;72, upper positioning plate;73, lower V-shaped pressing plate;74, lower pressing plate cylinder;75, positioning cylinder;76, positioning connecting pair;77, upper V-shaped pressing plate;78, pressing plate switching cylinder;8, heating assembly;81, welding positioning plate;82, second guide block;83, welding stand;84, welding lifting guide rail;85, third guide block;86, heating plate lifting cylinder;87, heating fixing seat;88, heating plate;89, rear fillet pressing plate;810, seventh guide block;811, feeding screw;812, feeding motor;9, feeding assembly;91, feeding belt;92, feeding drive motor;93, pushing cylinder;94, pushing plate;95, fourth guide block;10, milling assembly;101, milling stand;102, front and rear feeding guide rail;103, sixth guide block;104, front and rear feeding drive cylinder;105, sliding seat;106, motor lifting cylinder;107, milling motor mounting plate;108, milling motor;109, milling cutter. DETAILED DESCRIPTION

[0027] For the purpose of clearly illustrating the technical features of the present application, the present application will be described in detail below with specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples to implement the different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present application omits the description of known components and processing techniques and processes to avoid unnecessary limitation of the present application. The orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as limiting or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] Embodiment one:

[0029] Please refer to Figures 1-5 , the present embodiment proposes a numerical control four corner welding machine with upper and lower V-shaped welding seam and outer corner arc, which comprises a bed body 4, the bed body 4 is connected with left and right cross beams 41 and 42 which are parallel to each other, and the left and right cross beams 41 and 42 can slide along the X direction; one end of the left cross beam 41 is connected with a machine head 2, and the other end of the right cross beam 42 is also connected with a machine head 2, and the four machine heads 2 can slide along the Y direction; the machine head 2 comprises a machine head bottom plate 21, two pressing assemblies 6 are symmetrically arranged on the machine head bottom plate 21, a positioning assembly 7 is slidably connected between the two pressing assemblies 6 along the Z direction, and the positioning assembly 7 can be connected from the top surface and the bottom surface of the profile 5; a heating assembly 8 is arranged on the machine head bottom plate 21, which can heat and melt the profile 5 fixed by the pressing assembly 6; a milling assembly 10 is also arranged on the machine head bottom plate 21, which can mill the welding slag; the left and right cross beams 41 and 42 are also provided with a feeding assembly 9 for conveying the profile 5 to move along the Y direction.

[0030] Embodiment two:

[0031] Continuing to refer to Figures 1-5 In this embodiment, the two pressing assemblies 6 are arranged perpendicular to each other, and the two pressing assemblies 6 form an L-shaped structure; the pressing assembly 6 comprises an upper pressing clamp 61 and a lower pressing clamp 62; the bottom of the lower pressing clamp 62 is connected with a first guide block 63, and the first guide block 63 is connected with a work advancing guide rail 22 on the bottom plate 21 of the machine head; a work advancing cylinder 64 is fixedly connected to the bottom plate 21 of the machine head, and the telescopic end of the work advancing cylinder 64 is connected with the lower pressing clamp 62, so as to drive the lower pressing clamp 62 and the first guide block 63 to slide along the work advancing guide rail 22; a vertical column 65 is connected to one side of the lower pressing clamp 62, the top of the vertical column 65 is connected with a pressing connecting plate 66, a pressing cylinder 67 is fixedly connected to the pressing connecting plate 66, and the telescopic end of the pressing cylinder 67 is connected with the upper pressing clamp 61; the upper pressing clamp 61 can move in the Z direction, and the upper pressing clamp 61 and the lower pressing clamp 62 can cooperate to press the profile 5.

[0032] A backing plate 68 is connected to the lower pressing clamp 62, the inner side of the backing plate 68 is attached to the outer side of the profile 5, the side surface of the upper pressing clamp 61 is further connected with a material hooking and clamping cylinder 69, the telescopic end of the material hooking and clamping cylinder 69 is connected with a material hooking and clamping plate 610; when the upper pressing clamp 61 and the lower pressing clamp 62 press the profile 5, the material hooking and clamping plate 610 can move towards the backing plate of the profile 5 to horizontally clamp the profile 5.

[0033] Embodiment three:

[0034] Continuing to refer to Figures 1-5 In this embodiment, the heating assembly 8 comprises a welding positioning plate 81, the bottom of the welding positioning plate 81 is connected with a second guide block 82, the second guide block 82 is connected with a moving guide rail 23 on the bottom plate 21 of the machine head, and the telescopic end of a moving cylinder 24 fixedly connected to the bottom plate 21 of the machine head is connected with the welding positioning plate 81, so that the welding positioning plate 81 can move along the moving guide rail 23; a welding vertical seat 83 is arranged obliquely on the positioning welding plate, the welding vertical seat 83 is connected with a welding lifting guide rail 84, and a third guide block 85 is slidingly connected to the welding lifting guide rail 84; the top of the welding vertical seat 83 is connected with a heating plate lifting cylinder 86, the telescopic end of the heating plate lifting cylinder 86 is connected with a heating fixed seat 87, the bottom of the heating fixed seat 87 is connected with the third guide block 85, and the heating fixed seat 87 is connected with a heating plate 88. After the profile 5 is pressed and fixed, since the lower positioning plate 71 reserves a space for the heating plate 88 to enter between the two profiles 5, the heating plate 88 can be moved in after the lower positioning plate 71 is moved down.

[0035] A rear round pressing plate 89 is also slidably connected to the welding positioning plate 81 at the bottom of the heating plate 88. The rear round pressing plate 89 can press on the welding position of the two profiles 5. The rear round pressing plate 89 is connected to the seventh guide block 810. The welding positioning plate 81 is connected to the feeding screw 811. The rear round pressing plate 89 is driven by the feeding motor 812 on the welding positioning plate 81 to move along the feeding screw 811. The edge rounding design during the welding between the two profiles 5 is realized by the rear round pressing plate 89. The rounding size can be changed by replacing the round pressing plate.

[0036] The milling assembly 10 of the embodiment is arranged together with the heating assembly 8 and is arranged on the welding positioning plate 81. The milling assembly 10 comprises a milling stand 101 connected to the welding positioning plate 81. The milling stand 101 is connected to the front and rear feeding guide rails 102. The front and rear feeding guide rails 102 are connected to the sixth guide block 103. The sixth guide block 103 is driven by the front and rear feeding driving cylinder 104 on the milling stand 101. The sixth guide block 103 is connected to the sliding seat 105. The sliding seat 105 is connected to the motor lifting cylinder 106. The motor lifting cylinder 106 is connected to the milling motor mounting plate 107. The milling motor mounting plate 107 is connected to the milling motor 108. The output end of the milling motor 108 is connected to the milling cutter 109.

[0037] The positioning assembly 7 of the embodiment comprises the upper positioning plate 72 and the lower positioning plate 71. The lower positioning plate 71 is vertically slidably connected to the machine head bottom plate 21. The top of the lower positioning plate 71 is connected to the lower V-shaped pressing plate 73. The bottom of the lower positioning plate 71 is connected to the lower pressing plate cylinder 74. The lower pressing plate cylinder 74 is connected to the positioning cylinder 75. The positioning cylinder 75 is vertically slidably connected to the bottom of the machine head bottom plate 21. The machine head bottom plate 21 and the positioning cylinder 75 are connected by the positioning connecting pair 76. The bottom of the sliding seat 105 is horizontally slidably connected to the upper positioning plate 72. The bottom of the upper positioning plate 72 is connected to the upper V-shaped pressing plate 77. The end of the upper V-shaped pressing plate 77 is connected to the pressing plate switching cylinder 78. The pressing plate switching cylinder 78 can drive the upper V-shaped pressing plate 77 to move along the upper positioning plate 72.

[0038] Embodiment four:

[0039] Continuing to refer to Figures 1-5 The feeding assembly 9 of the embodiment comprises the feeding belt 91. The feeding belt 91 is driven by the feeding driving motor 92 fixed on the left cross beam 41. The machine head bottom plate 21 is connected to the pushing cylinder 93. The pushing cylinder 93 is connected to the pushing plate 94 at the telescopic end. The pushing plate 94 is connected to the fourth guide block 95. The machine head 2 base is connected to the pushing guide rail 25. The fourth guide block 95 and the pushing guide rail 25 are matched to realize the guidance. The pushing plate 94 can push the welded profile 5 to the feeding belt 91 to realize the feeding.

[0040] In addition, the fifth guide block 26 is connected at the bottom of the head bottom plate 21, the left cross beam 41 and the right cross beam 42 are each connected with the head moving guide rail 27, and the fifth guide block 26 cooperates with the head moving guide rail 27 to realize the movement of the head 2 along the Y direction.

[0041] Embodiment five:

[0042] The welding method of the numerical control four-corner welding machine with the above-mentioned up-and-down V-shaped weld, outer corner arc type includes the following steps:

[0043] S1. Debugging; the control part in the embodiment includes the operation box 1 and the electric control box 3, the power supply of the whole welding machine is controlled through the electric control box 3, the distance between the left cross beam 41 and the right cross beam 42 of the equipment is adjusted to the required profile 5 feeding width size by inputting the length and width size of the window size on the operation box 1, the positioning cylinder 75 and the lower pressing plate cylinder 74 are simultaneously extended, and the positioning plate is exposed below the pressing clamp 62;

[0044] S2. Loading; first, the profile 5 between the left cross beam 41 and the right cross beam 42 is placed, and the two ends of the profile 5 are placed on the pressing clamp 62 by manual; then, the profile 5 between the two heads 2 on the single cross beam is placed, and the two profiles 5 are respectively placed between the two heads 2 on the left cross beam 41 and the two heads 2 on the right cross beam 42 by manual;

[0045] S3. Positioning and limiting; the work advancing cylinder 64 drives the pressing assembly 6 to tightly press the profile 5 welding surface to the two sides of the positioning plate along the work advancing guide rail 22; after the positioning is completed, the upper pressing cylinder 67 drives the upper pressing clamp 61 to press the profile 5, and the hooking material clamping cylinder 69 pulls the hooking material clamping plate 610 to press the profile 5, so as to prevent the profile 5 from running out of material; finally, the positioning cylinder 75 and the lower pressing plate cylinder 74 are retracted, and the positioning plate is retracted below the plane of the pressing clamp 62.

[0046] S4. Heating; after the positioning plate is retracted, the work advancing cylinder 64 is withdrawn to reach the heating plate 88 feeding position, the heating plate lifting cylinder 86 drives the heating plate 88 to reach the heating position along the welding lifting guide rail 84, the work advancing cylinder 64 drives the profile 5 to tightly press on the heating plate 88, and heating is performed;

[0047] S5. Milling; the work advancing cylinder 64 drives the profile 5 to exit, the heating plate 88 is withdrawn from the inside of the profile 5, and then the moving cylinder 24 is driven to switch to the milling position of the head 2, the position of the milling motor 108 and the milling cutter 109 is adjusted through the forward and backward feeding drive cylinder 104 and the motor lifting cylinder 106, the milling motor 108 drives the milling cutter 109 to complete the milling of the edge position of the upper and lower surfaces and the rear step surface of the profile 5, the excess welding slag is milled off, too much welding slag is prevented from overflowing during welding, then the work advancing cylinder 64 drives the profile 5 to the milling head 2 exit position, the milling head 2 exits, and the milling process of the welding slag is completed;

[0048] S6. Welding; the rear fillet pressing plate 89 is driven by the feeding motor 812 to press the profile 5, the lower pressing plate cylinder 74 is extended, the lower V-shaped pressing plate 73 presses the lower surface of the profile 5 to prevent the welding slag on the lower surface of the profile 5 from overflowing the lower surface of the profile 5; at the same time, the upper V-shaped pressing plate 77 is driven by the pressing plate switching cylinder 78 to extend to the pressing position to realize the pressing of the upper V-shaped groove;

[0049] S7. Discharging; after the welding time is reached, the upper V-shaped pressing plate 77 and the lower V-shaped pressing plate 73 are retracted, then the rear fillet pressing plate 89 is withdrawn, and the left cross beam 41 and the right cross beam 42 are moved in the reverse direction; the material pushing cylinder 93 drives the material pushing plate 94 to push the profile 5 out of the pressing assembly 6, and the profile 5 falls onto the feeding belt 91, and the feeding belt 91 conveys the welded profile 5 out of the welding machine.

[0050] Although the specific embodiments of the utility model are described in combination with the drawings, it is not a limitation on the protection scope of the utility model, and various modifications or changes made by the person skilled in the art on the basis of the technical scheme of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. A numerical control four corner welding machine of upper and lower V-shaped welding seam, outer corner circular arc type, characterized in that: The utility model provides a multi -functional welding machine, including the bed body (4), the bed body (4) is connected with each other parallel left crossbeam (41) and right crossbeam (42), left crossbeam (41) and right crossbeam (42) can slide along X direction, the both ends of left crossbeam (41) are connected with one head (2) respectively, and the both ends of right crossbeam (42) are also connected with one head (2) respectively, and four groups of head (2) can slide along Y direction, head (2) includes head bottom plate (21), and two pressure tight subassembly (6) are symmetrically set up on head bottom plate (21), and the positioning subassembly (7) is slidably connected between two pressure tight subassembly (6) along Z direction, heating subassembly (8) is equipped on head bottom plate (21), can carry out heating melting treatment to the section bar (5) of pressure tight subassembly (6) fixed, head bottom plate (21) is also equipped with milling assembly (10), can mill slag, left crossbeam (41) and right crossbeam (42) are also equipped with feeding assembly (9) that section bar (5) moves along Y direction.

2. The CNC four corner welding machine of upper and lower V-shaped welding seam and outer corner circular arc type according to claim 1, characterized in that: Two pressure tight subassembly (6) are perpendicular to each other and form L type structure, pressure tight subassembly (6) includes upper pressure clamp (61) and lower pressure clamp (62), the bottom of lower pressure clamp (62) is connected with first guide block (63), and corresponding head bottom plate (21) is connected with work guide rail (22), head bottom plate (21) is fixedly connected with work cylinder (64), and the telescopic end of work cylinder (64) is connected with lower pressure clamp (62), drives lower pressure clamp (62) and first guide block (63) to slide along work guide rail (22), one side of lower pressure clamp (62) is connected with stand (65), the top of stand (65) is connected with pressure tight connecting plate (66), pressure tight connecting plate (66) is fixedly connected with pressure tight cylinder (67), and the telescopic end of pressure tight cylinder (67) is connected with upper pressure clamp (61), upper pressure clamp (61) can move along Z direction, and upper pressure clamp (61) and lower pressure clamp (62) can be pressed tightly section bar (5).

3. The CNC four corner welding machine of upper and lower V-shaped welding seam and outer corner circular arc type according to claim 2, characterized in that: Lower pressure clamp (62) is connected with backing plate block (68), and the inner side of backing plate block (68) is attached to the outer side of section bar (5), the side of upper pressure clamp (61) is also connected with material hooking clamping cylinder (69), the telescopic end of material hooking clamping cylinder (69) is connected with material hooking clamping plate (610), and material hooking clamping plate (610) can move to the backing plate of section bar (5) and clamp section bar (5) transversely while upper pressure clamp (61) and lower pressure clamp (62) are pressed tightly section bar (5).

4. The CNC four corner welding machine of upper and lower V-shaped welding seam and outer corner circular arc type according to claim 1, characterized in that: The heating assembly (8) comprises a welding positioning plate (81), the bottom of the welding positioning plate (81) is connected with a second guide block (82), the second guide block (82) is connected with a moving guide rail (23) on the corresponding head bottom plate (21), the telescopic end of a moving cylinder (24) fixed on the head bottom plate (21) is connected with the welding positioning plate (81), so that the welding positioning plate (81) can move along the moving guide rail (23); a welding stand (83) is arranged on the welding positioning plate (81) in an inclined manner, the welding stand (83) is connected with a welding lifting guide rail (84), and the welding lifting guide rail (84) is connected with a third guide block (85) in a sliding manner; the top of the welding stand (83) is connected with a heating plate lifting cylinder (86), the telescopic end of the heating plate lifting cylinder (86) is connected with a heating fixing seat (87), the bottom of the heating fixing seat (87) is connected with the third guide block (85), and the heating fixing seat (87) is connected with a heating plate (88).

5. The CNC four-roll welding machine of claim 4, wherein: The bottom of the heating plate (88) is also connected with a rear corner pressing plate (89) in a sliding manner on the welding positioning plate (81), the rear corner pressing plate (89) can be pressed on the welding position of the two profiles (5), the rear corner pressing plate (89) is connected with a seventh guide block (810), a feeding screw (811) is connected on the welding positioning plate (81) corresponding to the seventh guide block (810), and the rear corner pressing plate (89) is driven to move along the feeding screw (811) by a feeding motor (812) on the welding positioning plate (81).

6. The CNC four corner welding machine of upper and lower V-shaped weld, outer corner circular arc type according to claim 1, characterized in that: The milling assembly (10) comprises a milling stand (101) connected to the welding positioning plate (81), a milling front-rear feeding guide rail (102) connected to the milling stand (101), a sixth guide block (103) connected to the milling front-rear feeding guide rail (102) in a matched manner, the sixth guide block (103) being driven by a front-rear feeding driving cylinder (104) on the milling stand (101), a sliding seat (105) connected to the sixth guide block (103), a motor lifting cylinder (106) connected to the sliding seat (105), a telescopic end of the motor lifting cylinder (106) being connected with a milling motor mounting plate (107), the milling motor mounting plate (107) being connected with a milling motor (108), and an output end of the milling motor (108) being connected with a milling cutter (109).

7. The CNC four corner welding machine of upper and lower V-shaped weld, outer corner circular arc type according to claim 6, characterized in that: The positioning assembly (7) comprises an upper positioning plate (72) and a lower positioning plate (71), the lower positioning plate (71) is vertically and slidably connected to the head bottom plate (21), the top of the lower positioning plate (71) is connected with a lower V-shaped pressing plate (73), the bottom of the lower positioning plate (71) is connected with a lower pressing plate cylinder (74), the lower pressing plate cylinder (74) is connected with a positioning cylinder (75), the positioning cylinder (75) is vertically and slidably connected to the bottom of the head bottom plate (21), and the head bottom plate (21) and the positioning cylinder (75) are connected through a positioning connecting pair (76); the bottom of the sliding seat (105) is transversely and slidably connected with the upper positioning plate (72), the bottom of the upper positioning plate (72) is connected with an upper V-shaped pressing plate (77), the end of the upper V-shaped pressing plate (77) is connected with a pressing plate switching cylinder (78), and the pressing plate switching cylinder (78) can drive the upper V-shaped pressing plate (77) to move along the upper positioning plate (72).

8. The CNC four corner welding machine of upper and lower V-shaped weld, outer corner circular arc type according to claim 1, characterized in that: The feeding assembly (9) comprises a feeding belt (91) driven by a feeding drive motor (92) fixed on the left cross beam (41); a pushing cylinder (93) is connected to the head bottom plate (21), the extension end of the pushing cylinder (93) is connected to a pushing plate (94), the pushing plate (94) is connected to a fourth guide block (95), a pushing guide rail (25) is connected to the base of the head (2) in correspondence, the fourth guide block (95) cooperates with the pushing guide rail (25) to realize guiding, and the pushing plate (94) can push the profile (5) after welding onto the feeding belt (91) to realize feeding.

9. The CNC four corner welding machine of upper and lower V-shaped weld, outer corner circular arc type according to claim 1, characterized in that: The bottom of the head bottom plate (21) is connected to a fifth guide block (26), the left cross beam (41) and the right cross beam (42) are each connected to a head moving guide rail (27), and the fifth guide block (26) cooperates with the head moving guide rail (27) to realize the movement of the head (2) along the Y direction.

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