Welding equipment for grinding wheel protective cover production

Abstract

The invention relates to the related technical field of welding, and discloses welding equipment for grinding wheel protective cover production, which comprises a longitudinal moving welding part and a transverse feeding part, the transverse feeding part comprises a support part I and a support part II which are oppositely arranged, a rotatable central shaft is arranged between the support part I and the support part II, and a plurality of support discs are sleeved on the central shaft; a floating tensioning part is arranged between every two adjacent supporting discs, each floating tensioning part comprises a flexible supporting part and a locking part, the center shaft is sleeved with the flexible supporting parts, the flexible supporting parts are located on the inner sides of the arc-shaped pieces, each flexible supporting part comprises a plurality of sliding rings arranged at intervals in the axial direction, and inverted-V-shaped elastic frames protruding in the radial direction are fixedly arranged between every two adjacent sliding rings; the inverted-V-shaped structure converts axial pressure into radial thrust, the rigidity of the cantilever structure is remarkably improved, the movable conical cylinder synchronously pushes the locking claw to conduct radial internal pressure, the open-loop hoop is elastically attached to the surface of the arc-shaped piece, gaps are synchronously compressed inside and outside, and the influence of welding thermal deformation is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field related to welding equipment, and more specifically, relates to a welding equipment for producing grinding wheel protective covers. Background Art

[0002] The grinding wheel guard consists of two parts: a fan-shaped cover body and an open ring hoop welded at the axis of the cover body. The cover body has an arc-shaped piece at the axial position to provide a welding point. The open ring hoop is sleeved on the arc-shaped piece, and the two are welded and fixed using a welding gun.

[0003] In the current manufacturing process of grinding wheel covers, the welding of open hoop and arc sheet faces three major technical bottlenecks: 1. Rigidity defects: The arc-shaped piece is a cantilever arc structure, which is prone to deformation under high welding temperature, causing the open ring hoop to deviate from the preset position; 2. Uneven pressure: The circumferential welding points have inconsistent local extrusion and collapse, resulting in different welding point bonding strengths and large fluctuations in batch production quality. 3. Uncontrolled thermal deformation: The high welding temperature exacerbates the change in the gap between the open hoop and the arc piece, and the traditional fixed support cannot synchronously compensate for the thermal expansion and contraction effects.

[0004] The existing technology lacks a dynamic support mechanism for the internal and external bidirectional welding process, making it difficult to balance positioning accuracy and welding consistency.

[0005] In view of this, the existing structure and defects are studied and improved, and a welding equipment for the production of grinding wheel guards is provided in order to achieve a more practical purpose. Summary of the Invention

[0006] The present invention provides a welding device for producing a grinding wheel protective cover, which is used to overcome the above-mentioned defects in the prior art.

[0007] The purpose and efficacy of the welding equipment for producing grinding wheel guards of the present invention are achieved by the following specific technical means: a welding equipment for producing grinding wheel guards, comprising a longitudinally movable welding part and a transverse feeding part, the transverse feeding part comprising a supporting part one and a supporting part two which are arranged opposite to each other, a rotatable central axis being arranged between the supporting part one and the supporting part two, a plurality of supporting discs being sleeved on the central axis, a floating tensioning part being arranged between adjacent supporting discs, the guard being sleeved on the central axis and being located between the supporting discs and the floating tensioning part, the floating tensioning part comprising a flexible supporting part and a locking part, the flexible supporting part being sleeved outside the central axis and being located on the inner side of the arc-shaped piece, the inner diameter of the locking part being larger than the outer diameter of the open ring hoop, and the locking part being sleeved on the outer side of the open ring hoop for A radial extrusion force is applied to the open ring hoop, and the flexible support part includes multiple axially spaced sliding rings, and a radially protruding inverted "V"-shaped elastic frame is fixedly arranged between adjacent sliding rings, and a support block is fixedly arranged at the tip of the elastic frame. The sliding ring located on the end side is fixedly provided with a movable cone, and the locking part includes an outer shell sleeved on the outside of the central axis and an adjusting cylinder fixed on the movable cone, the inner side of the adjusting cylinder has an inner conical surface, and the inner side of the inner conical surface is also provided with a plurality of locking claws arranged at circumferential intervals, and a guide bolt is provided between the locking claw and the inner wall of the outer shell to realize radial sliding of the locking claw, and the support part two and the support part one can approach each other to squeeze the outer shell to move toward the grinding wheel outer cover and synchronize the flexible support part and the locking part to lock the open ring hoop.

[0008] A further technical solution is that the horizontal feeding part also includes a base, a slide rail 1 is provided on one side of the base, a second motor is provided on the slide rail 1 for horizontal sliding, a support part 1 is fixedly provided on the upper side of the second motor, a gear 1 is provided at the shaft end of the second motor, a central axis is provided in the support part 1 for horizontal rotation, a gear 2 is fixedly provided at the end of the central axis, and gear 2 is meshed with gear 1.

[0009] A further technical solution is that the horizontal feeding part also includes a slide rail 2, which is spaced apart from the slide rail 1, and a first motor is arranged on the slide rail 1 for horizontal sliding. A support part 2 is fixedly arranged on the upper side of the first motor, one end of the central axis passes through the support part 2 and rotates in the support part 2, a threaded rod is fixedly arranged on the shaft end of the first motor, a center frame is arranged between the slide rails 1 and 2, the lower end of the center frame is fixedly connected to the base, and the upper end of the center frame has a horizontal threaded hole 1, and the threaded rod is threadedly connected in the threaded hole 1.

[0010] A further technical solution is that a locking part is provided on the opposite side of support part two and support part one, and the locking part includes a locking ring and a connecting ring that are coaxial and fixedly connected to each other. The connecting ring is rotatably connected to support part two or support part one, and the connecting ring has a through hole one in the center through which the central axis can pass, and the support part two has a through hole two in the center through which the central axis passes, and the locking ring has a threaded hole two in the center, and the central axis is threadedly connected to the threaded hole two.

[0011] A further technical solution is that the longitudinally movable welding part includes a longitudinal frame fixed on the base, a longitudinal slide rail is arranged on the longitudinal frame, a welding unit is longitudinally slidably arranged on the longitudinal slide rail, and an electric telescopic rod is also fixed on the longitudinal frame, which drives the welding unit to move longitudinally.

[0012] According to a further technical solution, the welding units have two groups that are arranged in a transverse spacing, and the spacing between the two groups of welding units is consistent with the spacing between the two groups of grinding wheel covers on the lower side.

[0013] A further technical solution is that the welding unit includes a mounting plate, which is fixed on the slider of the longitudinal slide rail. The mounting plate is rotated by the rotating shaft to set the rotating plate. A connecting frame is set at one end of the rotating plate. The connecting frame clamps the welding head. An arc groove is provided on the rotating plate. A positioning threaded hole is provided on the mounting plate. The positioning bolt passes through the arc groove and is locked in the positioning threaded hole to lock the angle of the rotating plate.

[0014] A further technical solution is that two limit shafts 1 are fixedly provided on the side of the support plate, and the limit shaft 1 limits the rotation angle of the grinding wheel cover. The side of the support plate is also fixedly provided with a limit shaft 2, and the limit shaft 2 limits the rotation angle of the open ring hoop.

[0015] A further technical solution is that a liquid-passing shaft is arranged at the center of the central shaft, a gas channel for gas to pass through is formed between the central shaft and the liquid-passing shaft, a liquid channel for liquid to pass through is provided in the liquid-passing shaft, a plurality of heat dissipation holes are provided on the side wall of the central shaft, the arc-shaped sheet is sleeved outside the central shaft and forms a support gap, the flexible support part is in the support gap, and the heat dissipation holes are connected to the support gap.

[0016] A further technical solution is that a movable body is axially slidably arranged inside the shell, a spring is arranged between the movable body and the movable cone, and a distance detector is also arranged between the movable body and the movable cone, the movable body is sleeved outside the central shaft, and a liquid control chamber is formed between the movable body and the central shaft, a piston ring is slidably arranged in the liquid control chamber, a movable ring is arranged on the side of the movable body away from the movable cone, the movable ring and the piston ring are fixedly connected by a sliding cylinder, a second hole is opened in the wall of the central shaft, the second hole is connected to the liquid control chamber, the part of the liquid shaft located in the liquid control chamber extends radially to form a fan-shaped protrusion, and a first hole is opened on the fan-shaped protrusion, the first hole connects the liquid channel with the second hole.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a floating tensioning part, which has the effect of strengthening the internal support of the arc piece and radial compensation of the split ring hoop. The movable cone in the floating tensioning part is compressed to drive the elastic frame to contract, and the inverted V-shaped structure converts the axial pressure into radial thrust, which significantly improves the rigidity of the cantilever structure; the movable cone simultaneously pushes the locking claw radially inward, so that the open ring hoop elastically fits the surface of the arc piece, and the gap is synchronously compressed inside and outside, reducing the influence of welding thermal deformation.

[0018] The present invention realizes automatic regulation of the radial stress collapse amount at the welding point by providing a flexible support part, wherein the radial collapse displacement of the open ring hoop is transmitted to multiple groups of sliding rings through the elastic frame, and the elastic frame is used to realize the superposition effect of multiple groups, converting the radial micro displacement into the axial amplified displacement, and cooperating with the distance detector to realize high-precision collapse amount monitoring; in addition, the hydraulic system controls the distance between the movable body and the movable cone by adjusting the position of the piston ring, and corrects the axial pressure of the spring on the movable cone in real time, so that the extrusion force of each welding point automatically returns to the set threshold.

[0019] The porous structure of the elastic frame guides the airflow through the gas channel, heat dissipation holes, and support gaps, directionally cooling the high-temperature welding area. The heat dissipation airflow suppresses local temperature rise, reduces gap fluctuations caused by thermal expansion, and ensures that the deformation during the welding process remains within a reasonable range. In addition, the support plate, grinding wheel cover, open ring hoop, and floating tensioner are pre-assembled as modular units and stacked axially, which improves the efficiency of one-time positioning and welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of the grinding wheel cover 25 installed on the support plate 26 in the present invention; Figure 3 This is a schematic diagram of the structure of the floating tensioning portion 24 and the open ring hoop 27 in the present invention; Figure 4 yes Figure 3 A schematic diagram of a partially enlarged structure of the middle floating tensioning portion 24; Figure 5 yes Figure 3 An enlarged structural diagram of the middle flexible support portion 40; Figure 6 is a schematic diagram of the three-dimensional structure of the flexible support portion 40 of the present invention; Figure 7 3D structural diagram of the floating tensioning portion 24 of the present invention; Figure 8 1 is an exploded view of the floating tensioning portion 24 of the present invention; Figure 9 It is a structural schematic diagram of the locking portion 23 of the present invention; Figure 10 It is a structural diagram of the welding unit 13 in the present invention.

[0021] Description of reference numerals: 10 base, 11 longitudinal frame, 12 electric telescopic rod, 13 welding unit, 14 first motor, 15 threaded rod, 16 center frame, 17 slide rail 2, 18 slide rail 1, 19 support part 2, 20 support part 1, 21 gear 2, 22 second motor, 23 locking part, 24 floating tensioning part, 25 grinding wheel cover, 26 support plate, 27 open ring hoop, 28 arc-shaped piece, 29 housing, 30 movable body, 31 movable ring, 33 central axis, 34 liquid shaft, 35 gas channel, 36 liquid channel, 37 first hole, 38 second hole , 39 support gap, 40 flexible support part, 41 sliding ring, 42 support block, 43 elastic frame, 44 movable cone, 45 adjustment cylinder, 46 inner cone, 47 locking claw, 48 guide bolt, 49 heat dissipation hole, 50 hydraulic control chamber, 51 piston ring, 52 guide hole, 53 outer cone, 54 anti-slip part, 55 sliding cylinder, 56 limit shaft one, 57 limit shaft two, 58 connecting ring, 59 locking ring, 60 mounting plate, 61 rotating plate, 62 rotating shaft, 63 arc groove, 64 positioning bolt, 65 connecting frame, 66 welding head. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0023] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0025] like Figures 1-10As shown, a welding device for producing a grinding wheel guard comprises a longitudinally movable welding portion and a transverse feeding portion, the transverse feeding portion comprises a supporting portion 1 20 and a supporting portion 2 19 which are arranged opposite to each other, a rotatable central shaft 33 is arranged between the supporting portion 1 20 and the supporting portion 2 19, a plurality of supporting discs 26 are sleeved on the central shaft 33, a floating tensioning portion 24 is arranged between adjacent supporting discs 26, the guard is sleeved on the central shaft 33 and is located between the supporting discs 26 and the floating tensioning portion 24, the floating tensioning portion 24 comprises a flexible supporting portion 40 and a locking portion, the flexible supporting portion 40 is sleeved outside the central shaft 33 and is located inside the arc-shaped piece 28, the inner diameter of the locking portion is larger than the outer diameter of the open ring hoop 27, and the locking portion is sleeved on the outside of the open ring hoop 27 for applying radial extrusion force to the open ring hoop 27, the flexible supporting portion 40 comprises a plurality of supporting discs 26, and a floating tensioning portion 24 is arranged between adjacent supporting discs 26, the guard is sleeved on the central shaft 33 and is located between the supporting discs 26 and the floating tensioning portion 24, the floating tensioning portion 24 comprises a flexible supporting portion 40 and a locking portion, the flexible supporting portion 40 is sleeved outside the central shaft 33 and is located inside the arc-shaped piece 28, the inner diameter of the locking portion is larger than the outer diameter of the open ring hoop 27, and the locking portion is sleeved on the outside of the open ring hoop 27 for applying radial extrusion force to the open ring hoop 27, The sliding rings 41 are axially spaced apart, and a radially protruding inverted "V"-shaped elastic frame 43 is fixedly set between adjacent sliding rings 41. A support block 42 is fixedly set at the tip of the elastic frame 43. A movable cone 44 is fixedly set on the sliding ring 41 at the end side. The locking part includes an outer shell 29 sleeved on the outside of the central axis 33 and an adjusting cylinder 45 fixed on the movable cone 44. The inner side of the adjusting cylinder 45 has an inner conical surface 46, and the inner side of the inner conical surface 46 is also provided with a plurality of locking claws 47 arranged at circumferential intervals. A guide bolt 48 is set between the locking claw 47 and the inner wall of the outer shell 29 to realize the radial sliding of the locking claw 47. The support part 2 19 and the support part 1 20 can approach each other to squeeze the outer shell 29 to move toward the grinding wheel outer cover 25 and make the flexible support part 40 and the locking part synchronously lock the open ring hoop 27.

[0026] It should be noted that the structure of the grinding wheel cover to be welded in this application includes a grinding wheel cover 25 and an open ring hoop 27, wherein the grinding wheel cover 25 is a fan-shaped structure with an open mouth on one side and an arc-shaped piece 28 at the center of the other side. The open ring hoop 27 is movably mounted on the arc-shaped piece 28. During welding, the longitudinally movable welding portion has a welding gun that can be longitudinally extended. The welding gun extends downward and contacts the side surface of the open ring hoop 27 to fix the open ring hoop 27 and the arc-shaped piece 28. The movable cone 44 is subjected to radial pressure to squeeze the elastic frame 43 to change the opening angle of the elastic frame 43, thereby changing the axial length of the flexible support portion 40.

[0027] In this embodiment, the side wall of the housing 29 is provided with circumferentially distributed guide holes 52, the end of the guide bolt 48 passes through the housing 29 and slides radially within the housing 29, and the guide bolt 48 is also covered with a reset spring, and the end of the guide bolt 48 is threadedly fixedly connected to the locking claw 47, and the reset spring is used to push the guide bolt 48 and the locking claw 47 to move radially outward.

[0028] The outer wall surface of the locking claw 47 is an outer conical surface 53, and the outer conical surface 53 and the inner conical surface 46 match each other. The inner wall surface of the locking claw 47 is raised to form an anti-slip portion 54 that abuts against the open ring hoop 27. Preferably, the transverse feeding portion also includes a base 10, a slide rail 18 is provided on one side of the base 10, a second motor 22 is provided on the slide rail 18 for transverse sliding, a support portion 20 is fixedly provided on the upper side of the second motor 22, a gear 1 is provided at the shaft end of the second motor 22, a central shaft 33 is provided in the support portion 20 for transverse rotation, a gear 21 is fixedly provided at the end of the central shaft 33, and the gear 21 is meshed with the gear 1.

[0029] Preferably, the horizontal feeding part also includes a slide rail 2 17, which is spaced apart from the slide rail 1 18, and the first motor 14 is horizontally slidably arranged on the slide rail 1 18, and a support part 2 19 is fixedly arranged on the upper side of the first motor 14, one end of the center shaft 33 passes through the support part 2 19 and rotates in the support part 2 19, a threaded rod 15 is fixedly arranged on the shaft end of the first motor 14, and a center frame 16 is arranged between the slide rail 18 and the slide rail 2 17, the lower end of the center frame 16 is fixedly connected to the base 10, and the upper end of the center frame 16 has a horizontal threaded hole 1, and the threaded rod 15 is threadedly connected in the threaded hole 1.

[0030] In this embodiment, power is supplied to the second motor 22, which drives gear 2 21 through gear 1, and in turn, the central shaft 33, thereby rotating the plurality of horizontally arranged grinding wheel covers. This, in conjunction with the longitudinally movable welding portion, enables localized circumferential welding of the grinding wheel covers. During the rotation of the second motor 22, the position of the grinding wheel covers needs to be adjusted laterally. During this process, power is supplied to the first motor 14, which drives the threaded rod 15 to rotate. Restricted by the center frame 16, the first motor 14 can move laterally on the second slide rail 17, thereby driving the movable body 30, gear 2 21, and the second motor 22 via the second support portion 19 to achieve lateral displacement adjustment.

[0031] Preferably, a locking portion 23 is provided on the opposite side of support portion 2 19 and support portion 1 20. The locking portion 23 includes a locking ring 59 and a connecting ring 58 that are coaxial and fixedly connected to each other. The connecting ring 58 is rotatably connected to support portion 2 19 or support portion 1 20. The center of the connecting ring 58 has a through hole 1 through which the central axis 33 can pass. The center of support portion 2 19 has a through hole 2 through which the central axis 33 passes. The center of the locking ring 59 has a threaded hole 2, and the central axis 33 is threadedly connected to the threaded hole 2.

[0032] In this embodiment, rotating the locking ring 59 around the central axis 33 can drive the locking ring 59 to adjust the axial displacement relative to the central axis 33. Rotating the locking ring 59 on both sides can adjust the distance between the two locking parts 23, thereby achieving the purpose of preliminarily locking several grinding wheel covers.

[0033] Preferably, the longitudinal movable welding part includes a longitudinal frame 11 fixed on the base 10, a longitudinal slide rail is provided on the longitudinal frame 11, a welding unit 13 is longitudinally slidably provided on the longitudinal slide rail, and an electric telescopic rod 12 is also fixed on the longitudinal frame 11, and the electric telescopic rod 12 drives the welding unit 13 to move longitudinally.

[0034] Preferably, the welding units 13 have two groups that are arranged at intervals in the transverse direction, and the spacing between the two groups of welding units 13 is consistent with the spacing between the two groups of grinding wheel covers on the lower side.

[0035] In this embodiment, the two groups of welding units 13 work simultaneously to improve the welding efficiency. In addition, in order to reduce the deformation of the thin-sheet structure caused by local high temperature, the second motor 22 controls the rotation of the central shaft 33 to adopt an interval welding strategy. For example, there are four welding points distributed circumferentially, namely A, B, C, and D in clockwise order. The welding order is A, C, B, and D, which disperses the heat points to facilitate internal heat dissipation and reduce heat accumulation.

[0036] Preferably, the welding unit 13 includes a mounting plate 60, which is fixed on the slider of the longitudinal slide rail. The mounting plate 60 is rotated to set the rotating plate 61 through the rotating shaft 62. A connecting frame 65 is set at one end of the rotating plate 61. The connecting frame 65 clamps the welding head 66. The rotating plate 61 has an arc groove 63, and a positioning threaded hole is provided on the mounting plate 60. The positioning bolt 64 passes through the arc groove 63 and is locked in the positioning threaded hole to lock the angle of the rotating plate 61.

[0037] Preferably, two limiting shafts 56 are fixedly provided on the side of the support plate 26 , and the limiting shaft 56 limits the rotation angle of the grinding wheel cover 25 . The side of the support plate 26 is also fixedly provided with a limiting shaft 57 , and the limiting shaft 57 limits the rotation angle of the open ring hoop 27 .

[0038] Preferably, a liquid-passing shaft 34 is provided at the center of the central shaft 33, and a gas channel 35 for gas to pass through is formed between the central shaft 33 and the liquid-passing shaft 34. A liquid channel 36 for liquid to pass through is provided in the liquid-passing shaft 34. A plurality of heat dissipation holes 49 are provided on the side wall of the central shaft 33. The arc-shaped sheet 28 is sleeved on the outside of the central shaft 33 and forms a support gap 39. The flexible support portion 40 is in the support gap 39, and the heat dissipation holes 49 are connected to the support gap 39.

[0039] In this embodiment, the device is also provided with a pump body, which is connected to the liquid channel 36 and is used to add liquid to or extract liquid from the liquid channel 36. The liquid has a dual function: first, it cools the air in the gas channel 35 and absorbs heat at the welding point; second, it is a medium for force transmission and is used to control the lateral displacement of the movable body 30 in the shell 29.

[0040] Preferably, a movable body 30 is axially slidably arranged inside the housing 29, a spring is arranged between the movable body 30 and the movable cone 44, and a distance detector is also arranged between the movable body 30 and the movable cone 44, the movable body 30 is sleeved on the outside of the central shaft 33, and a liquid control chamber 50 is formed between the movable body 30 and the central shaft 33, a piston ring 51 is slidably arranged in the liquid control chamber 50, a movable ring 31 is arranged on the side of the movable body 30 away from the movable cone 44, the movable ring 31 and the piston ring 51 are fixedly connected by a sliding cylinder 55, a second hole 38 is provided in the wall of the central shaft 33, the second hole 38 is connected to the liquid control chamber 50, the part of the liquid shaft 34 located in the liquid control chamber 50 extends radially to form a fan-shaped protrusion, and a first hole 37 is provided on the fan-shaped protrusion, the first hole 37 connects the liquid channel 36 with the second hole 38.

[0041] Specifically, the distance detector may be an infrared detector.

[0042] The working steps of this device are as follows: 1. Install the grinding wheel cover in batches. The specific process is as follows. By default, the support part 2 19 and the support part 1 20 are away from each other, so that the right end of the central shaft 33 is away from the end of the support part 2 19, so that the operator can easily put the support plate 26, the grinding wheel cover 25, the open ring hoop 27 and the floating tensioning part 24 as a unit on the central shaft 33. Multiple above-mentioned units are laterally abutted and put on the central shaft 33, and the locking part 23 is rotated. Under the action of the threaded fit, the locking parts 23 at both ends approach each other and axially abut the multiple above-mentioned units tightly to complete the locking action.

[0043] 2. Start the second motor 22. With the gears meshing, the second gear 21 rotates to drive the central shaft 33 to rotate. The central shaft 33 drives the multiple units thereon to rotate synchronously. The electric telescopic rod 12 drives the welding unit 13 to move downward to complete the circumferential welding of the split hoop 27.

[0044] 3. Since there is a certain gap between the open hoop 27 and the arc-shaped sheet 28, and the arc-shaped sheet 28 itself is an arc-shaped cantilever structure with insufficient rigidity, a certain extrusion pressure is generated at the welding point accompanied by high temperature. Therefore, the welding effect of the open hoop 27 and the arc-shaped sheet 28 is not ideal, which will cause the open hoop 27 to deviate from the preset posture. In order to enhance the consistency of welding quality and improve the quality of mass production, the present application provides internal and external synchronous and controllable support forces for the welding process of the arc-shaped sheet 28 and the open hoop 27 by setting a floating tensioning part 24. The specific process is as follows: On the one hand, as the locking parts 23 at both ends approach each other and preliminarily lock the above-mentioned units, the movable body 30 is subjected to axial compression, and the movable body 30 transmits the compression force to the movable cone 44 through the spring, and the movable cone 44 transmits the axial pressure to the elastic frame 43. The two feet of the elastic frame 43 are compressed, and the angle of its inverted V-shaped structure is reduced, thereby providing radial thrust for the support block 42, so that the support block 42 moves radially to support the arc-shaped piece 28, thereby providing good support for the cantilever structure. The elastic frame 43 fills the support gap 39 and has a large number of gaps, which facilitates the airflow to flow from the gas channel 35 and the heat dissipation hole 49 into the support gap 39, and cools the local high temperature, thereby reducing the drastic change in the gap caused by high temperature. In addition, when the welding head 66 squeezes the open ring hoop 27 downward, the force-bearing part of the open ring hoop 27 is caused to collapse radially. In order to keep the radial collapse of multiple circumferential welding points roughly the same, so that the bonding force of multiple circumferential welding points remains similar, when radial collapse occurs, radial movement will be transmitted to the support block 42, and the support block 42 will be transmitted to the sliding ring 41 through the elastic frame 43. The distance between adjacent sliding rings 41 will increase, and the radial movement of a single elastic frame 43 will be transferred to the interval increment of a pair of sliding rings 41. The radial movement of multiple elastic frames 43 generates a superposition of axial displacement through the above process, realizing the amplification of radial displacement to axial displacement. By setting a distance detector to detect the amplified displacement, the detection accuracy of the welding point collapse amount is improved. In coordination with this, there is a flow in the liquid channel 36. The moving liquid is used to control the distance of the piston ring 51 in the liquid control chamber 50. Since the lateral position of the movable ring 31 is limited by the adjacent support plate 26, the movable body 30 will passively move in the shell 29, thereby controlling the distance between the movable body 30 and the movable cone 44, and then controlling the compression amount of the spring between the two. That is to say, when the extrusion force on the welding point at a certain direction exceeds the preset value, the axial pressure of the spring on the movable cone 44 is reduced by means of liquid control, thereby reducing the radial support force of the support block 42 on the arc piece 28, so that the extrusion force at the welding point is restored to the set value range, and vice versa, so that the extrusion force of multiple axially distributed welding points is maintained in a relatively average range, and the problem of inconsistent collapse of different welding points is overcome by adaptively adjusting the internal support force.

[0045] On the other hand, under hydraulic control, the movable body 30 approaches the movable cone 44. Under the thrust of the spring, the movable cone 44 drives the adjusting cylinder 45 to move, and the inner cone surface 46 cooperates with the outer cone surface 53. The locking claw 47 can move radially inward under the guidance of the guide bolt 48, thereby compressing the open ring hoop 27 and making the open ring hoop 27 fit with the arc piece 28. The axial movement of the movable cone 44 is converted into radial movement of the support block 42 and the locking claw 47. The support block 42 and the locking claw 47 move synchronously to compress the gap between the open ring hoop 27 and the arc piece 28. The rigidity of the arc piece 28 is improved and it is less likely to deform. The open ring hoop 27 can elastically deform and fit closely to the surface of the arc piece 28 under the abutment of the locking claw 47, and the gap between the open ring hoop 27 and the arc piece 28 is synchronously reduced from two internal and external directions, which can maintain the positioning accuracy of the open ring hoop 27 and reduce the side effects of the radial extrusion force at the welding point and the high heat on the positioning of the open ring hoop 27.

[0046] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A welding device for producing a grinding wheel guard, characterized by: It includes a longitudinally movable welding portion and a transverse feeding portion, wherein the transverse feeding portion includes a supporting portion 1 and a supporting portion 2 arranged opposite to each other, a rotatable central axis is provided between the supporting portion 1 and the supporting portion 2, a plurality of supporting discs are sleeved on the central axis, a floating tensioning portion is provided between adjacent supporting discs, and a protective cover is sleeved on the central axis and is located between the supporting discs and the floating tensioning portion; The floating tensioning portion includes a flexible support portion and a locking portion, the flexible support portion is sleeved outside the central axis and is located on the inner side of the arc-shaped piece, the inner diameter of the locking portion is larger than the outer diameter of the open ring hoop, and the locking portion is sleeved on the outer side of the open ring hoop for applying radial extrusion force to the open ring hoop, the flexible support portion includes a plurality of axially spaced sliding rings, a radially protruding inverted "V"-shaped elastic frame is fixedly arranged between adjacent sliding rings, a support block is fixedly arranged at the tip of the elastic frame, and a movable cone is fixedly arranged on the sliding ring located on the end side; The locking part includes an outer shell sleeved on the outside of the central axis and an adjusting cylinder fixed on the movable cone. The inner side of the adjusting cylinder has an inner conical surface, and the inner side of the inner conical surface is also provided with a plurality of locking claws arranged at circumferential intervals. A guide bolt is provided between the locking claw and the inner wall of the outer shell to realize radial sliding of the locking claw. The support part 2 and the support part 1 can approach each other to squeeze the outer shell toward the grinding wheel outer cover and enable the flexible support part and the locking part to synchronously lock the open ring hoop.

2. The welding equipment for producing grinding wheel guards according to claim 1, characterized in that: The horizontal feeding part also includes a base, a slide rail 1 is provided on one side of the base, a second motor is provided on the slide rail 1 for horizontal sliding, a support part 1 is fixedly provided on the upper side of the second motor, a gear 1 is provided on the shaft end of the second motor, the central axis is provided in a horizontally rotating manner in the support part 1, a gear 2 is fixedly provided on the end of the central axis, and the gear 2 is meshed with the gear 1.

3. The welding equipment for producing grinding wheel guards according to claim 2, characterized in that: The horizontal feeding part also includes a slide rail 2, which is spaced apart from the slide rail 1, and a first motor is arranged on the slide rail 1 for horizontal sliding. A support part 2 is fixedly arranged on the upper side of the first motor, one end of the central axis passes through the support part 2 and rotates in the support part 2, a threaded rod is fixedly arranged on the shaft end of the first motor, a center frame is arranged between the slide rail 1 and the slide rail 2, the lower end of the center frame is fixedly connected to the base, and the upper end of the center frame has a horizontal threaded hole 1, and the threaded rod is threadedly connected to the threaded hole 1.

4. The welding equipment for producing grinding wheel guards according to claim 1, characterized in that: The opposite sides of the support part 2 and the support part 1 are both provided with a locking part, and the locking part includes a locking ring and a connecting ring that are coaxial and fixedly connected to each other, and the connecting ring is rotatably connected to the support part 2 or the support part 1, and the center of the connecting ring has a through hole 1 through which the central axis can pass, and the center of the support part 2 has a through hole 2 through which the central axis passes, and the center of the locking ring has a threaded hole 2, and the central axis is threadedly connected to the threaded hole 2.

5. The welding equipment for producing grinding wheel guards according to claim 2, characterized in that: The longitudinal movable welding part includes a longitudinal frame fixed on the base, a longitudinal slide rail is provided on the longitudinal frame, a welding unit is longitudinally slidably provided on the longitudinal slide rail, and an electric telescopic rod is also fixed on the longitudinal frame, and the electric telescopic rod drives the welding unit to move longitudinally.

6. The welding equipment for producing grinding wheel guards according to claim 5, characterized in that: The welding units include two groups that are arranged at intervals in the transverse direction, and the spacing between the two groups of welding units is consistent with the spacing between the two groups of grinding wheel covers on the lower side.

7. The welding equipment for producing grinding wheel guards according to claim 5, characterized in that: The welding unit includes a mounting plate, which is fixed on the slider of the longitudinal slide rail. The mounting plate is rotated by the rotating shaft to set the rotating plate. A connecting frame is set at one end of the rotating plate. The connecting frame clamps the welding head. An arc groove is provided on the rotating plate. A positioning threaded hole is provided on the mounting plate. The positioning bolt passes through the arc groove and is locked in the positioning threaded hole to lock the angle of the rotating plate.

8. The welding equipment for producing grinding wheel guards according to claim 1, characterized in that: Two limiting shafts 1 are fixedly provided on the side of the support plate, and the limiting shaft 1 limits the rotation angle of the grinding wheel cover. The side of the support plate is also fixedly provided with a limiting shaft 2, and the limiting shaft 2 limits the rotation angle of the open ring hoop.

9. The welding equipment for producing grinding wheel guards according to claim 1, characterized in that: A liquid-passing shaft is arranged at the center of the central shaft, a gas channel for gas to pass through is formed between the central shaft and the liquid-passing shaft, a liquid channel for liquid to pass through is provided in the liquid-passing shaft, a plurality of heat dissipation holes are provided on the side wall of the central shaft, the arc-shaped sheet is sleeved outside the central shaft and forms a support gap, the flexible support portion is located in the support gap, and the heat dissipation holes are connected to the support gap.

10. The welding equipment for producing grinding wheel guards according to claim 9, characterized in that: A movable body is axially slidably arranged inside the shell, a spring is arranged between the movable body and the movable cone, and a distance detector is also arranged between the movable body and the movable cone, the movable body is sleeved outside the central shaft, a liquid control chamber is formed between the movable body and the central shaft, a piston ring is slidably arranged in the liquid control chamber, a movable ring is arranged on the side of the movable body away from the movable cone, the movable ring and the piston ring are fixedly connected by a sliding cylinder, a second hole is provided in the wall of the central shaft, the second hole is communicated with the liquid control chamber, the part of the liquid-passing shaft located in the liquid control chamber radially extends to form a fan-shaped protrusion, and a first hole is provided on the fan-shaped protrusion, the first hole connects the liquid channel and the second hole.

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