A pre-precision welding spiral steel pipe arc plate weld grinding platform and method

Abstract

The present application provides a kind of pre-precise welding spiral steel pipe arc plate weld grinding platform and method, grinding platform includes support and the shell of being arranged outside support, support is equipped with swing arm movement rotary mechanism, swing arm movement rotary mechanism is used to drive arc plate to do arc motion.The present application drives swing arm movement by swing arm movement mechanism, realizes swing arm regularity to do reciprocating arc motion, by setting arc plate clamping device, the radian plate is fixed quickly, provides stable grinding condition for grinder head, so that the arc plate of clamping realizes continuous weld grinding under the action of grinder head.Swing arm movement rotary radius adjusting structure can satisfy the grinding of arc plate weld corresponding to different steel pipe diameter specifications;Integrate inner arc arc plate, outer arc arc plate swing arm movement rotary mechanism on a platform, can simultaneously satisfy the grinding of inner arc plate and outer arc plate, compact structure;Swing arm is fixed in support by swing arm rotary shaft, easy to remove and overhaul, change lane faster.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical processing, and particularly relates to a pre-precision welding spiral steel pipe arc plate weld grinding platform and method. BACKGROUND

[0002] In the two-step process of pre-precision welding of spiral welded pipes, in order to meet the installation and welding requirements of the arc plate (or arc plate) at the two ends of the pipe blank of the pre-welding unit, the first is to cut the finished steel pipe for a large amount of consumption and production of the arc plate; the second is to cut off and scrap the arc plate at the end of the offline steel pipe. Such normalized consumption and scrap behavior is the main reason why the two-step welding pipe process has been facing high production cost and labor intensity.

[0003] The first is to try manual grinding, which has the disadvantages of high labor intensity and safety risk, and cannot meet the requirements of safety, health and environmental protection; the second is to use a machine tool grinder to grind off the original weld, which has the disadvantage of high machining and logistics cost, so this repeated use work has not been valued by everyone. The repeated use of the arc plate of the pre-welded pipe blank of the spiral welded pipe and this process equipment is still blank. SUMMARY

[0004] The present application aims to provide a pre-precision welding spiral steel pipe arc plate weld grinding platform to overcome the above technical problems in the prior art.

[0005] Another object of the present application is to provide an arc plate weld grinding method to solve the problem of high labor intensity of manual grinding.

[0006] To this end, the technical solution provided by the present application is as follows:

[0007] A pre-precision welding spiral steel pipe arc plate weld grinding platform, comprising a support and an outer shell arranged outside the support, a swing arm movement rotary mechanism is arranged in the support, and the swing arm movement rotary mechanism is used to drive the arc plate to move in an arc line.

[0008] The swing arm movement rotary mechanism comprises two swing arms, an inner arc arc plate swing arm movement rotary mechanism and an outer arc arc plate swing arm movement rotary mechanism, and the inner arc arc plate swing arm movement rotary mechanism and the outer arc arc plate swing arm movement rotary mechanism are arranged in an upper and lower staggered manner or side by side.

[0009] The swing arm movement rotary mechanism comprises a swing arm, a swing arm rotary shaft, a swing arm movement mechanism and an arc plate clamping device, the swing arm rotary shaft passes through the front end of the support, the swing arm and the rear end of the support in sequence, the swing arm movement mechanism is connected with one side of the swing arm, the swing arm movement mechanism is used to drive the swing arm to move, and the arc plate clamping device is connected with the swing arm.

[0010] The swing arm motion rotating mechanism further comprises a swing arm motion rotating radius adjusting structure, the swing arm motion rotating radius adjusting structure comprises a plurality of radius adjusting holes arranged on the swing arm central axis and a plurality of through holes arranged on the support middle support beam, the radius adjusting holes and the through holes are one-to-one corresponding, and the swing arm rotating shaft can be pulled out from the radius adjusting holes and the through holes.

[0011] The swing arm comprises two parallel arranged arc plates, the two arc plates are connected through a connecting shaft, and the swing arm motion mechanism is fixedly connected with the connecting shaft.

[0012] The swing arm motion mechanism comprises a lead screw, a joint and a hand wheel 1, one end of the lead screw is connected with the joint through a nut, the other end of the lead screw is connected with the hand wheel 1, a window is arranged on the shell, one end of the lead screw connected with the hand wheel 1 is located outside the window, and a nut seat is arranged below the lead screw.

[0013] The arc plate clamping device comprises a tightening lead screw, a main beam shaft and a tightening plate, the tightening lead screw is arranged on the central line of the arc plate of the swing arm, one end of the tightening lead screw is connected with a hand wheel 2, the other end of the tightening lead screw is threadedly connected with a tightening sleeve, and the tightening sleeve is connected with the tightening plate.

[0014] The main beam shaft is at least two, the same tightening plate is sleeved on all the main beam shafts, a fixed sleeve and a movable sleeve are sleeved on each main beam shaft, the movable sleeve is connected or connected with the tightening plate, one end of the main beam shaft is connected with the swing arm, the other end of the main beam shaft is connected with the fixed sleeve, and the reset spring is sleeved between the fixed sleeve and the movable sleeve.

[0015] The support is welded by a rectangular steel pipe, the support is a hollow support, and the support is provided with lifting lugs on the top.

[0016] The arc plate welding seam grinding method comprises the following steps: firstly, the arc plate is fixed, and then the arc plate is driven to move in an arc line, in the movement process, the movement track of the arc plate is in contact with the fixed grinding machine head at all times, so that the welding seam on the arc plate is ground, and the grinding amount is kept consistent.

[0017] According to the specification of the arc plate, the welding seam of the arc plate of different specifications is ground by adjusting the radius of the arc line movement of the arc plate.

[0018] The beneficial effects of the present application are as follows:

[0019] The arc plate welding seam grinding platform provided by the present application drives the swing arm to move through the swing arm motion mechanism, realizes the regular reciprocating arc line movement of the swing arm, quickly fixes the arc plate through the arc plate clamping device, provides a stable grinding condition for the fixed grinding machine head, and enables the arc plate clamped on the swing arm to be continuously ground under the action of the grinding machine head.

[0020] The arc guide plate welding seam grinding platform can meet the grinding of the arc guide plate welding seam corresponding to different steel pipe diameters through the swing arm movement rotary radius adjusting structure; the inner arc arc guide plate swing arm movement rotary mechanism and the outer arc arc guide plate swing arm movement rotary mechanism are integrated on one platform, so that the grinding of the inner arc plate and the outer arc plate can be simultaneously met, and the structure is compact; the swing arm is fixed in the support through the swing arm rotary shaft, so that convenient disassembly and maintenance and lane changing can be realized.

[0021] The arc guide plate clamping device is used for replacing manual fixing of the arc guide plate, and the arc guide plate clamping stability is good; the swing arm is driven by the swing arm movement mechanism, so that the position accuracy of grinding and the consistency of the grinding allowance are ensured. The arc guide plate reuse post work in the two-step method pipe manufacturing process of the spiral welded pipe is filled, the previous bottleneck problems, such as high labor intensity of manual grinding and high machine repair processing cost, cannot be recycled, the steel pipe yield and the efficiency of production material preparation work are effectively improved, and long-term economic benefits are created.

[0022] The application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the three-dimensional assembly drawing of the application;

[0024] Figure 2 is the front view of the application;

[0025] Figure 3 is the 45-degree side / top view three-dimensional drawing of the application;

[0026] Figure 4 is the side view of the application.

[0027] In the drawings: 1, support; 2, swing arm; 3, swing arm rotary shaft; 4, arc plate; 5, radius adjusting hole; 6, through hole; 7, main beam shaft; 8, lead screw; 9, loose joint; 10, hand wheel one; 11, nut seat; 12, tightening lead screw; 13, tightening plate; 14, movable sleeve; 15, reset spring; 16, fixed sleeve; 17, hand wheel two; 18, support beam; 19, arc guide plate; 20, grinder; 21, shell; 22, lifting lug; 23, window; 24, connecting shaft; 25, inner arc arc guide plate swing arm movement rotary mechanism; 26, outer arc arc guide plate swing arm movement rotary mechanism. DETAILED DESCRIPTION

[0028] The embodiments of the application are described below by specific examples, and other advantages and effects of the application can be easily understood by those skilled in the art from the content disclosed in the specification.

[0029] The exemplary embodiments of the present application will be described with reference to the accompanying drawings, while the present application can be implemented in various forms, and is not limited to the embodiments described herein, which are provided to fully and completely disclose the present application and to fully convey the scope of the present application to those skilled in the art. The terms used in the exemplary embodiments represented in the drawings are not limited to the present application. In the drawings, the same elements are denoted by the same reference numerals.

[0030] Unless otherwise defined, the terms (including technical terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. Also, it is to be understood that the terms defined by commonly used dictionaries are to be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art, and are not to be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0031] Embodiment 1

[0032] The embodiment provides a pre-precision welding spiral steel pipe arc plate weld grinding platform, which comprises a support 1 and an outer shell 21 arranged outside the support 1, a swing arm movement rotary mechanism is arranged in the support 1, and the swing arm movement rotary mechanism is used for driving the arc plate 19 to move in an arc line.

[0033] Principle of the present application

[0034] The arc plate weld grinding platform provided by the present application is matched with a grinder 20 to realize grinding of the weld of the arc plate 19, wherein the grinder 20 is located on one side of the arc plate weld grinding platform, the position of the grinder 20 relative to the support 1 of the arc plate weld grinding platform is unchanged during the grinding process, and the grinder 20 is rotated to realize grinding. Before the present application, the head of the grinder 20 needs to be adjusted in time according to the up-down and left-right actions to meet the grinding weld requirement, and the electric control and mechanical movement mechanism are relatively complex.

[0035] The arc plate 19 is driven by the swing arm movement rotary mechanism to move in an arc curve, and the movement track of the arc plate 19 is just in contact with the head of the grinder 20 during the movement process, so that the weld on the arc plate 19 is ground and the grinding amount is kept consistent.

[0036] Embodiment 2

[0037] On the basis of the embodiment 1, the embodiment provides a pre-precision welding spiral steel pipe arc plate weld grinding platform, as shown in Figure 1 The swing arm movement rotary mechanism comprises two swing arm movement rotary mechanisms, namely an inner-arc arc plate swing arm movement rotary mechanism 25 and an outer-arc arc plate swing arm movement rotary mechanism 26, and the inner-arc arc plate swing arm movement rotary mechanism 25 and the outer-arc arc plate swing arm movement rotary mechanism 26 are arranged in a staggered manner or arranged side by side.

[0038] AsFigure 3 As shown, the inner arc-initiating plate swing arm rotation mechanism 25 and the outer arc-initiating plate swing arm rotation mechanism 26 are staggered vertically, which can simultaneously satisfy the grinding of the inner arc plate and the outer arc plate. It is a multi-functional machine with a compact structure.

[0039] Example 3:

[0040] Based on Embodiment 2, this embodiment provides a pre-finished spiral steel pipe arc-starting plate weld grinding platform. The swing arm motion rotation mechanism includes a swing arm 2, a swing arm rotation shaft 3, a swing arm motion mechanism, and an arc-starting plate clamping device. The swing arm rotation shaft 3 passes through the front end of the support 1, the swing arm 2, and the rear end of the support 1 in sequence. The swing arm motion mechanism is connected to one side of the swing arm 2 and is used to drive the swing arm 2 to move. The arc-starting plate clamping device is connected to the swing arm 2.

[0041] Usage process:

[0042] First, the arc-starting plate 19 is clamped and fixed by the arc-starting plate clamping device. The purpose is to provide a stable grinding condition for the fixed grinding machine head 20. Then, the grinding machine 20 is turned on, and the swing arm 2 is driven to move by the swing arm motion mechanism. The swing arm 2 makes a regular reciprocating arc curve motion with the swing arm rotation axis 3 as the fulcrum. The grinding machine 20 grinds the arc-shaped weld on the arc-starting plate 19.

[0043] Example 4:

[0044] Based on Embodiment 3, this embodiment provides a pre-welded spiral steel pipe arc-starting plate weld grinding platform. The swing arm rotation mechanism further includes a swing arm rotation radius adjustment structure. The swing arm rotation radius adjustment structure includes multiple radius adjustment holes 5 set on the central axis of the swing arm 2 and multiple through holes 6 set on the support beam 18 in the middle of the bracket 1. The radius adjustment holes 5 and the through holes 6 correspond one-to-one. The swing arm rotation shaft 3 can be pulled out from the radius adjustment holes 5 and the through holes 6.

[0045] like Figure 3 As shown, by setting up a swing arm rotation radius adjustment structure, the radius adjustment holes 5 on the swing arm 2 correspond one-to-one with the multiple through holes 6 on the support beam 18. The swing arm rotation shaft 3 is inserted into the arc-starting plate 19 corresponding to different steel pipe diameter specifications, thereby achieving the grinding of arc-starting plates 19 with different specifications of curvature, while ensuring that the grinding height of the weld is consistent each time. The distance between the swing arm rotation shaft 3 and the midpoint of the arc-starting plate clamping device is the radius of the arc movement of the arc-starting plate 19.

[0046] The present application utilizes the swing arm rotation shaft 3 to fix the swing arm 2 on the support 1, which can realize convenient removal and maintenance, and faster lane changing. The swing arm 2 radius data adjustment corresponding to the arc data of the arc plate 19 of various specifications is realized by the radius adjusting hole 5 and the through hole 6 transformation, which saves space, and ensures the consistency of the relative elevation of the arc plate clamping device.

[0047] The present application cooperates with the foot switch fine tuning function of the grinding machine 20 to realize the adaptive grinding of the welds with different helix angles and circular arc change characteristics, to replace manual grinding and greatly reduce labor intensity. It can effectively replace the function of the machine tool, and replace manual grinding of the weld excess height with machinery, ending the history that the arc plate 19 of the pre-precision welded spiral steel pipe cannot be reused.

[0048] Example 5:

[0049] On the basis of example 3, the present embodiment provides a pre-precision welded spiral steel pipe arc plate weld grinding platform, the swing arm 2 includes two parallel arranged arc plates 4, the two arc plates 4 are connected through the connecting shaft 24, and the swing arm movement mechanism is fixedly connected with the connecting shaft 24.

[0050] As shown in Figure 3 , the swing arm 2 includes two parallel arranged arc plates 4. In this embodiment, the inner arc arc plate swing arm movement rotation mechanism and the outer arc arc plate swing arm movement rotation mechanism are arranged in an upper and lower staggered manner, and have basically the same structure, the difference is as follows:

[0051] As shown in Figure 1 , the upper rear part is the inner arc arc plate swing arm movement rotation mechanism, and the lower front part is the outer arc arc plate swing arm movement rotation mechanism (or vice versa). As shown in Figure 2 and Figure 3 , the swing arm 2 of the upper swing arm movement rotation mechanism is connected in one body by two arc plates 4 with small upper part and large lower part through the connecting shaft 24, the swing arm rotation shaft 3 is inserted in a position that is higher, the rotation radius is larger, and the arc plate clamping device is connected with the lower part of the arc plate 4; on the contrary, the swing arm 2 of the lower swing arm movement rotation mechanism is connected in one body by two arc plates 4 with large upper part and small lower part through the connecting shaft 24, the swing arm rotation shaft 3 is inserted in a position that is higher, the rotation radius is smaller, and the arc plate clamping device is connected with the upper part of the arc plate 4.

[0052] Example 6:

[0053] On the basis of example 3, the present embodiment provides a pre-precision welded spiral steel pipe arc plate weld grinding platform, the swing arm movement mechanism includes a lead screw 8, a joint 9 and a hand wheel 10, one end of the lead screw 8 is connected with the joint 9 through a nut, the other end of the lead screw 8 is connected with the hand wheel 10, a window 23 is formed in the outer shell 21, one end of the lead screw 8 connected with the hand wheel 10 is located outside the window 23, and a nut seat 11 is arranged below the lead screw 8.

[0054] As Figure 1 and Figure 3 shown, by rotating hand wheel one 10, drive screw 8 to rotate, make with screw 8 threaded joint swing joint 9 through the connecting shaft 24 drive swing arm 2 to do regular do reciprocating radian curve movement. Two groups of swing arm movement mechanism structure is same. Screw nut seat 11 is used to meet the rotation of screw 8. And the friction resistance from the head of the grinder 20 is connected with screw 8 tension decomposition, so the vibration is small, mechanical properties are superior.

[0055] Example 7:

[0056] On the basis of example 3, the embodiment provides a pre precise welding spiral steel pipe arc plate welding grinding platform, the arc plate clamping device includes tight screw 12, main beam shaft 7 and tight plate 13, the tight screw 12 is installed in the radian plate 4 of the swing arm 2, one end of the tight screw 12 is connected with hand wheel two 17, the other end is connected with tight sleeve, the tight sleeve is connected with tight plate 13;

[0057] The main beam shaft 7 is at least two, all the main beam shaft 7 is sleeved with the same tight plate 13, the fixed sleeve 16 and the movable sleeve 14 are sleeved on each main beam shaft 7, the movable sleeve 14 is connected or connected with the tight plate 13, one end of the main beam shaft 7 is connected with the swing arm 2, the other end of the main beam shaft 7 is connected with the fixed sleeve 16, the reset spring 15 is sleeved between the fixed sleeve 16 and the movable sleeve 14.

[0058] Use process:

[0059] Place the arc plate 19 between the fixed sleeve 16 and the movable sleeve 14, then rotate the hand wheel two 17, the hand wheel two 17 drives the tight screw 12 to rotate, makes the tight sleeve connected with the tight screw 12 do linear motion, thereby drives the tight plate 13 to move forward and extrude the movable sleeve 14, the reset spring 15 is compressed, the arc plate 19 is clamped between the fixed sleeve 16 and the movable sleeve 14, then grinding is carried out; after grinding, rotate the hand wheel two 17 in reverse, the tight sleeve drives the tight plate 13 to move in the direction of to and fro, the movable sleeve 14 is automatically bounced back under the action of the reset spring 15, the arc plate 19 after grinding can be taken out. Among them, the tight plate 13 can realize the left and right clamping of the movable sleeve 14 and the quick synchronous movement of the movable sleeve 14.

[0060] The structure of the upper and lower arc plate clamping devices is same.

[0061] It can also be different, such as Figure 3 and Figure 4As shown, the difference is that the reset spring 15 in the upper arc plate clamping device is located between the fixed sleeve 16 and the movable sleeve 14, and the reset spring 15 in the lower arc plate clamping device is sleeved on the tightening screw 12 and located between the tightening sleeve and the inner arc plate 4; during use, the hand wheel 2 17 drives the tightening screw 12 to rotate, so that the tightening sleeve connected with the tightening screw 12 moves linearly, drives the tightening plate 13 to move to the fixed sleeve 16, and pushes the movable sleeve 14 to the fixed sleeve 16 in the process of compressing the reset spring 15 of the tightening sleeve, so that the arc plate 19 is clamped between the fixed sleeve 16 and the movable sleeve 14. Among them, the movable sleeve 14 and the fixed sleeve 16 are both round sleeve clamping jaws, which can effectively improve the cutting point accuracy of various arc plates.

[0062] Embodiment 8:

[0063] On the basis of embodiment 1, the embodiment provides a pre-precision welding spiral steel pipe arc plate weld grinding platform, the support 1 is welded by a rectangular steel pipe, the support 1 is a hollow support 1, and the support 1 is provided with a lifting lug 22 on the top.

[0064] The reliable hollow support 1 is adopted, the gravity center of the whole machine is stable, the swing arm 2 is effectively supported to achieve stable movement effect, the 2.0mm thick steel plate shell 21 is installed outside the support 1, and the safety and aesthetics are ensured.

[0065] The gravity balance lifting lug 22 is designed, the pick-and-load concept is embodied, the installation and early-stage cost is saved by 90%, and the later-stage maintenance cost is small; in order to realize safety, health and environmental protection, a slag receiving cover can be placed on the left side of the grinding platform.

[0066] Embodiment 9:

[0067] The embodiment provides a welding seam grinding method of an arc plate 19, first, the arc plate 19 is fixed, and then the arc plate 19 is driven to move in an arc line, in the movement process, the welding seam on the arc plate 19 is always in contact with the fixed position of the grinder 20 head, so that the welding seam on the arc plate 19 is ground and the grinding amount is kept consistent.

[0068] The arc plate is effectively reused, the labor cost and material consumption are saved by 50%, the finished pipe yield of the contract pipe is improved by 0.15%, and the production profit of more than one million yuan can be created per year.

[0069] Embodiment 10:

[0070] On the basis of embodiment 9, the embodiment provides a welding seam grinding method of an arc plate 19, according to the specification of the arc plate 19, the radius of the arc line movement of the arc plate 19 is adjusted to realize the grinding of the welding seam of the arc plate 19 of different specifications.

[0071] In summary, the present application is through the swing arm movement radius adjustment device can adjust the trajectory of the swing arm 2 arc motion, to adapt to different specifications arc of the arc plate 19 welding seam grinding, to ensure the consistency of the welding seam grinding height each time; Two is the arc plate clamping device design to ensure the stability of the workpiece and fast operation.

[0072] The above examples are only illustrative of the present application, and do not constitute a limitation on the scope of protection of the present application, any same or similar design as the present application belongs to the protection scope of the present application.

Claims

1. A pre-precise welding spiral steel pipe arc board weld joint grinding platform, characterized in that: The support is internally provided with a swing arm movement rotating mechanism for driving the arc plate to make an arc movement; The swing arm movement rotating mechanism comprises a swing arm, a swing arm rotating shaft, a swing arm movement mechanism and an arc plate clamping device, the swing arm rotating shaft passes through the front end of the support, the swing arm and the rear end of the support in sequence, the swing arm movement mechanism is connected with one side of the swing arm, the swing arm movement mechanism is used for driving the swing arm to move, the arc plate clamping device is connected with the swing arm, and the distance between the swing arm rotating shaft and the midpoint of the arc plate clamping device is the radius of the arc movement of the arc plate; The swing arm movement rotating mechanism further comprises a swing arm movement rotating radius adjusting structure, the swing arm movement rotating radius adjusting structure comprises a plurality of radius adjusting holes arranged on the central axis of the swing arm and a plurality of through holes arranged on the middle support beam of the support, the radius adjusting holes and the through holes are one-to-one corresponding, and the swing arm rotating shaft can be pulled out from the radius adjusting holes and the through holes; The arc plate clamping device comprises a jacking screw, a main beam shaft and a jacking plate, the jacking screw is arranged on the center line of the swing arm, one end of the jacking screw is connected with a hand wheel two, the other end of the jacking screw is threadedly connected with a jacking sleeve, and the jacking sleeve is connected with the jacking plate; The main beam shaft is at least two, all the main beam shafts are provided with the same jacking plate, a fixed sleeve and a movable sleeve are arranged on each main beam shaft, the movable sleeve is connected with or connected to the jacking plate, one end of the main beam shaft is connected with the swing arm, the other end of the main beam shaft is connected with the fixed sleeve, and the reset spring is arranged between the fixed sleeve and the movable sleeve.

2. A pre-welded spiral steel pipe arc starting plate weld dressing platform according to claim 1, characterized in that: The swing arm movement rotating mechanism is two, which are an inner arc arc plate swing arm movement rotating mechanism and an outer arc arc plate swing arm movement rotating mechanism, and the inner arc arc plate swing arm movement rotating mechanism and the outer arc arc plate swing arm movement rotating mechanism are arranged in a staggered mode or a side-by-side mode.

3. A pre-welded spiral steel pipe arc starting plate weld dressing platform according to claim 1, characterized in that: The swing arm comprises two parallel arranged arc plates, and the two arc plates are connected through a connecting shaft.

4. A pre-welded spiral steel pipe arc starting plate weld dressing platform according to claim 1, characterized in that: The swing arm movement mechanism comprises a screw rod, a movable joint and a hand wheel one, one end of the screw rod is connected with the movable joint through a nut, the other end of the screw rod is connected with the hand wheel one, a window is formed in the shell, one end of the screw rod connected with the hand wheel one is located outside the window, and a nut seat is arranged below the screw rod.

5. A pre-welded spiral steel pipe arc starting plate weld dressing platform according to claim 1 or 2, characterized in that: The support is welded by a rectangular steel pipe, the support is a hollow support, and a lifting lug is arranged on the top of the support.

6. A method of arc striking panel weld dressing, characterized by: The pre-welding spiral steel pipe arc plate weld polishing platform of any one of the comparative documents 1-5 is used to first fix the arc plate, then drive the arc plate to make an arc movement, in the movement process, the movement track of the arc plate is just in contact with the fixed polishing machine head, so that the weld on the arc plate is polished and the polishing amount is kept consistent.

7. A method of arc striking plate weld scarfing according to claim 6, characterised in that: According to the specification of the arc plate, the radius of the arc movement of the arc plate is adjusted to polish the weld of the arc plate of different specifications.

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