Welding method of high-wear-resistance mining high-strength butterfly chain

Abstract

A high-wear-resistance mining high-strength butterfly-shaped chain welding method comprises the following steps that S1, a supporting base lifts a to-be-welded flat vertical ring and front and back connecting loop chains to a positioning module, and the flat vertical ring is clamped and fixed in the horizontal direction through the positioning module; s2, the welding conductor is pressed downwards to make contact with the flat vertical ring under the action of a welding clamp and then tightened inwards, and the welding conductor is completely attached to the two sides of an opening of the flat vertical ring; s3, the opening of the flat vertical ring is welded in a preheating flash butt welding mode; and S4, after welding is completed, the welding conductor is lifted, the deburring part extends out, welding burrs are removed, and the appearance quality of the chain is guaranteed. According to the invention, the welding problem of the high-wear-resistance mining high-strength butterfly chain can be solved. After welding is completed, a specially-designed deburring blade is used for profiling the outer contour of the section of the vertical ring, welding burrs are removed, and the appearance quality of the chain is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of processing of butterfly chains, and in particular to a high wear-resistant welding method for high-strength mining butterfly chains. Background Art

[0002] Mine chains are used as a supporting transmission medium for coal mining face conveyors in production, and are widely used in various coal mining conveying equipment such as scraper conveyors and transfer conveyors. They are one of the most used spare parts in coal mining scraper conveyors.

[0003] At present, there are mainly two forms of mine chains: one is a high-strength mining round link chain, the characteristic of which is that the vertical link and the horizontal link are the same welded round rings, and the implementation standard is GB / T 12718-2009 "High-strength mining round link chain"; the other is a high-strength mining compact chain, the characteristic of which is that the horizontal link is a welded round ring and the vertical link is a flat extruded / forged ring, and the implementation standard is MT / T 929-2004 "High-strength mining compact chain". Compared with the simple method of alternately knitting the round link chains one by one, knitting the compact chain requires bending and knitting through a special knitting combination die. However, with the development of technology, there appears a chain disclosed in the invention patent with the application number US13143285. The shape of the horizontal link of this chain is approximately butterfly-shaped, and the vertical link is flat. By changing the shape of the horizontal link of the chain, it is adapted to the use of the scraper; however, due to the special structural form of the butterfly chain, the existing welding methods for mine chains can only be used for round link chains and compact chains, and cannot be used for welding butterfly chains. Summary of the Invention

[0004] In order to solve the technical problems existing in the above technology, in view of this, it is necessary to provide a high wear-resistant welding method for high-strength mining butterfly chains.

[0005] A high wear-resistant welding method for high-strength mining butterfly chains includes the following steps, Step S1: The support seat lifts the flat vertical link to be welded and the front and rear connecting link chains to the positioning module, and uses the positioning module to clamp and fix the flat vertical link in the horizontal direction; Step S2: The welding conductor is pressed down by the welding tongs to contact the flat vertical link, and then tightened inward, so that the welding conductor completely fits on both sides of the flat vertical link opening; Step S3: The flat vertical link opening is welded by the preheating flash butt welding method; Step S4: After welding is completed, the welding conductor is lifted, and the deburring part extends out to remove the welding burrs.

[0006] Preferably, in step S3, the welding method is as follows, The link is heated and preheated by intermittent current pulses; The end faces of the weld joint are slightly contacted and electrified for flash welding; In the later stage of flash butt welding, upsetting force is applied to the flat vertical ring, and the weld gap rapidly decreases; After upsetting ends, the upsetting pressure is continuously maintained until the weld metal is completely crystallized.

[0007] Preferably, during welding, the jaw distance is 48 mm, the welding stroke is 15 mm, the secondary voltage is 12.6 V, the back current of the ring is 1030 A, the preheating times are 20 times, the contact pressure is 30 bar, the burn-off amount is 2.5 mm, and the burr-removing stroke is 8 mm.

[0008] Preferably, the positioning module includes a left positioning die and a right positioning die; the left positioning die and the right positioning die are located on both sides of the support base and are used to clamp the open vertical ring from both sides of the open vertical ring.

[0009] Preferably, the ends of the left positioning die and the right positioning die have positioning grooves adapted to the size and shape of the open vertical ring, and the junction of the bottom surface and the side wall of the positioning groove is arc-shaped.

[0010] Preferably, mounting parts are arranged on the sides of the left positioning die and the right positioning die away from the positioning grooves, and the sides of the left positioning die and the right positioning die facing the support base have support inclined surfaces capable of supporting the butterfly flat ring.

[0011] Preferably, the junction of the bottom surface and the side wall of the support groove is arc-shaped.

[0012] Preferably, there are four welding conductors, and the four welding conductors are symmetrically arranged left and right along the support base. Card slots adapted to the outer contour of the open vertical ring are formed at the corners of the ends of each welding conductor, so that the card slots formed at the ends of two oppositely arranged welding conductors can clamp the open vertical ring.

[0013] Preferably, the burr-removing part includes a substrate, and a notch capable of passing through the open vertical ring is formed on the substrate. Burr-removing blades adapted to the outer contour of the open vertical ring are symmetrically arranged at the left end and the right end of the notch.

[0014] Preferably, a concave platform facing the burr-removing blade at the right end of the notch is formed on the front surface of the substrate, and a concave platform facing the burr-removing blade at the left end of the notch is formed on the back surface of the substrate.

[0015] Compared with the prior art, the high wear-resistant and high-strength mining butterfly chain welding method provided by the present invention uses a support base to lift the flat vertical ring to be welded and the front and rear connecting ring chains to the positioning module, and uses the positioning module to clamp and fix the flat vertical ring in the horizontal direction; the welding conductor is pressed down to contact the flat vertical ring under the action of the welding pliers, and then tightened inward so that the welding conductor completely fits on both sides of the opening of the flat vertical ring; the opening of the flat vertical ring is welded by the preheating flash butt welding method; after welding, the welding conductor is lifted, and the deburring part extends out to remove the welding burrs to ensure the appearance quality of the chain. The present invention can solve the welding problem of the high wear-resistant and high-strength mining butterfly chain. After welding, a specially designed deburring blade is used to follow the outer contour of the vertical ring section to remove the welding burrs and ensure the appearance quality of the chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram when welding the vertical ring and the butterfly flat ring of the invention.

[0018] Figure 2 For the invention Figure 1 Top view structural diagram.

[0019] Figure 3 For the invention Figure 1 Structural diagram from another angle.

[0020] Figure 4 It is a schematic structural diagram when removing burrs of the invention.

[0021] Figure 5 For the invention Figure 4 Top view structural diagram.

[0022] Figure 6 For the invention Figure 4 Structural diagram from another angle.

[0023] Figure 7 It is a schematic structural diagram of the left positioning die of the invention.

[0024] Figure 8 It is a schematic structural diagram of the support base of the invention.

[0025] Figure 9 It is a schematic structural diagram of the welding conductor of the invention.

[0026] Figure 10 It is a schematic structural diagram of the deburring part of the invention.

[0027] In the figure: positioning module 01, left positioning mold 11, right positioning mold 12, positioning groove 13, installation part 14, support inclined plane 15, support base 02, support groove 21, welding conductor 03, card slot 31, deburring part 04, substrate 41, notch 42, deburring blade 43, concave platform 44, open ring 05, butterfly flat ring 06. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0030] The present invention provides a high wear-resistant and high-strength mining butterfly chain welding method, including the following steps. Step S1: The support base lifts the flat ring to be welded and the front and rear connecting chain rings to the positioning module, and uses the positioning module to clamp and fix the flat ring in the horizontal direction. Step S2: Under the action of the welding tongs, the welding conductor presses down to contact the flat ring, and then tightens inward so that the welding conductor completely fits on both sides of the flat ring opening. Step S3: Weld the flat ring opening by using the preheating flash butt welding method. Step S4: After welding is completed, the welding conductor is lifted, and the deburring part extends to remove the welding burrs to ensure the appearance quality of the chain.

[0031] Specifically, in step S3, the welding method is as follows. Heat and preheat the chain link with intermittent current pulses. The end faces of the weld joint are slightly contacted and electrified for flash welding; under the action of a strong current density, it instantaneously melts to form a liquid overbeam that bursts between the two end faces of the weld joint, with sparks flying everywhere to form a flash. In the later stage of flash butt welding, apply upsetting force to the flat ring, and the weld joint gap rapidly decreases; the overbeam stops bursting, and at the same time, the liquid metal and oxide inclusions on the end face are extruded, so that the clean plastic metals are in close contact. After upsetting is completed, the upsetting pressure is continuously maintained until the weld metal is completely crystallized; and the continuous maintenance of the upsetting pressure promotes the progress of metal recrystallization, forming common grains and obtaining a firm joint.

[0032] Specifically, during welding, the jaw distance is 48 mm, the welding stroke is 15 mm, the secondary voltage is 12.6 V, the loop-back current is 1030 A, the preheating times are 20 times, the contact pressure is 30 bar, the burn-off is 2.5 mm, and the burr-removing stroke is 8 mm.

[0033] Please refer to Figures 1 to 10 , in which the positioning module 01 includes a left positioning die 11 and a right positioning die 12; the left positioning die 11 and the right positioning die 12 can clamp the open vertical ring from both sides of the open vertical ring; and the support base 02 is located between the left positioning die 11 and the right positioning die 12 and can support the lower part of the open vertical ring; the welding conductor 03 is located between the left positioning die 11 and the right positioning die 12 and can form a top pressure on the opening of the open vertical ring; so that the positioning module 01, the support base 02, and the welding conductor 03 form a four-point stable positioning for the open vertical ring and the butterfly flat ring, thereby enabling accurate and stable welding.

[0034] In one embodiment, the ends of the left positioning die 11 and the right positioning die 12 have positioning grooves 13 that are adapted to the size and shape of the open vertical ring. When the open vertical ring is clamped from left and right by the left positioning die 11 and the right positioning die 12, the positioning grooves 13 can be adapted to the outer contour of the open vertical ring to improve the clamping stability. The movement of the left positioning die 11 and the right positioning die 12 can be realized by an auxiliary device with a telescopic function, such as a hydraulic cylinder, an electric telescopic rod, a pneumatic telescopic rod, etc. This technology is prior art and will not be elaborated here.

[0035] Among them, in order to better make the positioning groove 13 form better contact with the open vertical ring, the junction of the bottom surface and the side wall of the positioning groove 13 is designed to be arc-shaped.

[0036] Among them, for the convenience of installation, mounting parts 14 are provided on the sides of the left positioning die 11 and the right positioning die 12 away from the positioning grooves 13, and the left positioning die 11 and the right positioning die 12 can be installed on the auxiliary device by means of bolt installation.

[0037] Among them, the sides of the left positioning die 11 and the right positioning die 12 facing the support base 02 have support inclined surfaces 15, and the support inclined surfaces 15 can support the butterfly flat ring, so that the two butterfly flat rings form an assembly with the open vertical ring in a V shape, facilitating welding.

[0038] In one embodiment, the end of the support base 02 has a support groove 21 that is adapted to the size and shape of the open vertical ring.

[0039] Among them, in order to better enable the support groove 21 to form better contact with the open vertical ring, the junction of the bottom surface and the side wall of the support groove 21 is designed to be arc-shaped.

[0040] In one embodiment, there are four welding conductors 03. The four welding conductors 03 are symmetrically arranged left and right along the support base 02. At the corner of each end of the welding conductor 03, a clamping groove 31 adapted to the outer contour of the open vertical ring is formed, so that the clamping grooves 31 formed at the ends of two oppositely arranged welding conductors 03 can clamp the open vertical ring, thereby positioning the opening of the open vertical ring. The welding conductor 03 can be installed on the welding equipment, and the up and down positions of the welding conductor 03 can be adjusted. This technology is the prior art and will not be elaborated here.

[0041] In one embodiment, the deburring part 04 includes a substrate 41. There is a notch 42 on the substrate 41 that can pass through the open vertical ring. Deburring blades 43 adapted to the outer contour of the open vertical ring are symmetrically arranged at the left end and the right end of the notch 42. When welding burrs need to be removed, the substrate 41 is moved forward so that the rear deburring blade 43 contacts the rear part of the welding vertical ring. The substrate 41 is moved towards the right positioning die 12 on the right, and the welding burrs at the rear part of the vertical ring can be removed by using the upper deburring blade 43. Then the substrate 41 is moved backward so that the front deburring blade 43 contacts the front part of the welding vertical ring. The substrate 41 is moved towards the left positioning die 11 on the left, and the welding burrs at the front part of the vertical ring can be removed by using the front deburring blade 43. During the whole process of removing welding burrs, only by adjusting the position of the deburring blade 43 can the deburring of the welding vertical ring be realized, without adjusting the position of the welding vertical ring, which greatly improves the removal efficiency. Moreover, the shape of the deburring blade 43 is adapted to the outer contour of the vertical ring section, and the appearance quality of the chain can be guaranteed when removing welding burrs.

[0042] Among them, there is a concave platform 44 on the front surface of the substrate 41 opposite to the deburring blade 43 at the right end of the notch 42, and there is a concave platform 44 on the back surface of the substrate 41 opposite to the deburring blade 43 at the left end of the notch 42. When removing welding burrs, the concave platform 44 can prevent the removed residues from splashing outwards.

[0043] In addition, for the convenience of installation and disassembly, bolt holes are provided on the substrate 41, so that the substrate 41 can be conveniently installed on the deburring equipment, thereby controlling the position movement of the deburring part 04. This technology is the prior art and will not be elaborated here.

[0044] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited by this. Those of ordinary skill in the art can understand all or part of the processes of the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A high wear-resistant and high-strength mining butterfly chain welding method, characterized in that: It includes the following steps: Step S1: The support base lifts the flat vertical ring to be welded and the front and rear connecting chain rings to the positioning module, and uses the positioning module to clamp and fix the flat vertical ring in the horizontal direction; Step S2: The welding conductor is pressed down to contact the flat vertical ring under the action of the welding pliers, and then tightened inward so that the welding conductor completely fits on both sides of the opening of the flat vertical ring; Step S3: The opening of the flat vertical ring is welded by using the preheating flash butt welding method; Step S4: After welding is completed, the welding conductor is lifted, and the deburring part extends out to remove the welding burrs.

2. The high wear-resistant and high-strength mining butterfly chain welding method according to claim 1, characterized in that: In step S3, the welding method is as follows: The chain ring is heated and preheated with intermittent current pulses; The end faces of the weld joints are slightly contacted and energized for flash welding; In the later stage of flash butt welding, upsetting force is applied to the flat vertical ring, and the gap of the weld joint is rapidly reduced; After upsetting ends, the upsetting pressure is continuously maintained until the weld joint metal is completely crystallized.

3. The high wear-resistant and high-strength mining butterfly chain welding method according to claim 2, wherein: During welding, the distance between the jaws is 48 mm, the welding stroke is 15 mm, the secondary voltage is 12.6 V, the current on the back of the ring is 1030 A, the number of preheating times is 20 times, the contact pressure is 30 bar, the melting amount is 2.5 mm, and the deburring stroke is 8 mm.

4. The high wear-resistant and high-strength mining butterfly chain welding method according to claim 1, characterized in that: The positioning module includes a left positioning die and a right positioning die; the left positioning die and the right positioning die are located on both sides of the support base and are used to clamp the open vertical ring from both sides of the open vertical ring.

5. The high-abrasion-resistant and high-strength mining butterfly chain welding method according to claim 4, wherein: The ends of the left positioning die and the right positioning die have positioning grooves adapted to the size and shape of the open vertical ring, and the junction of the bottom surface and the side wall of the positioning groove is arc-shaped.

6. The high-wear-resistant and high-strength mining butterfly chain welding method according to claim 5, characterized in that: Installation parts are arranged on the sides of the left positioning die and the right positioning die away from the positioning grooves, and support inclined surfaces capable of supporting the butterfly flat ring are provided on the sides of the left positioning die and the right positioning die facing the support base.

7. The high wear-resistant and high-strength mining butterfly chain welding method according to claim 6, characterized in that: The junction of the bottom surface and the side wall of the support groove is arc-shaped.

8. The high-wear-resistant and high-strength mining butterfly chain welding method according to claim 1, characterized in that: There are four welding conductors, and the four welding conductors are symmetrically arranged left and right along the support base. Card slots adapted to the outer contour of the open vertical ring are formed at the corners of the ends of each welding conductor, so that the card slots formed at the ends of two oppositely arranged welding conductors can clamp the open vertical ring.

9. The high-abrasion-resistant and high-strength mining butterfly chain welding method according to claim 6, wherein: The deburring part includes a substrate, and a notch capable of passing through the open vertical ring is formed on the substrate. Deburring blades adapted to the outer contour of the open vertical ring are symmetrically arranged at the left end and the right end of the notch.

10. The high-wear-resistant and high-strength mining butterfly chain welding method according to claim 9, characterized in that: A concave platform facing the deburring blade at the right end of the notch is provided on the front surface of the substrate, and a concave platform facing the deburring blade at the left end of the notch is provided on the back surface of the substrate.

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