Accessory assembly welding positioning device and method

Abstract

The invention provides an accessory assembly welding positioning device which comprises a base and a positioning device body, a positioning assembly is connected to the base, an accessory set is connected to the positioning assembly, an arc-shaped welding groove is formed in one end of the accessory set, and a mounting hole is formed in the other end of the accessory set; the base is provided with a mounting hole, the fitting group is used for positioning the mounting hole through a positioning assembly, the base is further provided with a plurality of positioning blocks, a cylindrical machine base can be positioned through the positioning blocks, and therefore the size H of a gap between an arc-shaped welding groove of the fitting group and the peripheral face of the machine base is uniform. The invention further provides an accessory installing, welding and positioning method. The center positioning precision of the accessory group mounting hole meets the requirement, and the assembly precision can be stably controlled; the consistency of welding gaps between the accessory group and the peripheral surface of the base is ensured; and the working steps are shortened, and the assembling quality consistency before welding is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of assembly, and in particular to a device and method for positioning the assembly welding of accessories. Background Art

[0002] Motor accessories are key load-bearing components in the entire stator structure. During the product manufacturing process, the assembly and positioning accuracy of the accessories and the welding quality control are very important. In the manufacturing process, the installation interface surface needs to be further processed after the accessories are welded. If the positioning accuracy of the accessories does not meet the requirements, it will affect the processing allowance of the subsequent process. The structure of traction motor accessories is mainly castings or steel plate processed parts. The assembly and positioning of accessories are currently done manually, and usually require the use of positioning devices to ensure the positioning accuracy of the accessories and improve work efficiency.

[0003] In the prior art, in order to ensure the positioning accuracy of accessories, a positioning template is generally used. The template has two positioning holes, which are the corresponding accessory holes. The round tube passes through the accessory hole and the round hole of the positioning template, so that the horizontal x and y direction positioning of a pair of accessories is achieved; a ladder-shaped step is set in the height direction of the round tube, so that the axial z direction positioning of a pair of accessories is achieved. Then the positioned accessory components are connected by spot welding with process ribs, and then assembled on the machine base in pairs. The surface of the machine base is marked with a center line. The center line of the template is placed to coincide with the center line of the surface of the machine base, and a 2mm process gasket is placed at the root of the accessory welding groove and the surface of the machine base. In the same way, assemble another pair of accessories. The axial dimensions of the accessory components on the machine base are all measured manually. After meeting the size requirements, positioning welding is performed, and then the round tube is used to pass through the installation holes of the lower and upper accessories to confirm the alignment.

[0004] However, the existing technical solution of using positioning templates to locate the assembly welding accuracy still has the following problems: (1) each time the gap size between the accessory and the outer surface of the machine base is located, the positioning size on the outer surface is not well controlled after spot welding with process ribs; (2) When assembling accessories and the machine base, on the one hand, a 2mm welding gap must be reserved, and on the other hand, the vertical posture of the accessories relative to the machine base must be ensured. The operability is poor and the accessories are prone to tilt; (3) The accessories are heavy, and the assembly process requires two people to operate at the same time. The adjustment and measurement of the accessories are time-consuming and laborious; (4) The x, y, and z distances between the mounting hole of the accessory and the center of the machine base cannot be measured and can only be controlled indirectly; (5) The current solution can only be positioned by marking. During the operation, the machine base is clamped on the welding positioner in a horizontal position. When assembling the accessories, the position needs to be adjusted and measured many times. In addition, a gap must be reserved between the root of the accessory welding groove and the surface of the machine base. The stability of the entire accessory assembly is poor, posing a safety hazard.

[0005] In summary, how to design a device and method for assembly welding and positioning of accessories to improve the accuracy and efficiency of assembly welding and positioning of accessories is a technical problem that needs to be solved urgently. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a device and method for positioning the assembly welding of accessories in view of the defects existing in the prior art, thereby improving the accuracy and efficiency of the assembly welding positioning of accessories.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for positioning an accessory assembly welding, comprising a base and a positioning component, wherein the positioning component is connected to the base, and an accessory assembly is connected to the positioning component, and one end of the accessory assembly is provided with an arc-shaped welding groove, and the other end is provided with a mounting hole; the accessory assembly is positioned by positioning the mounting hole through the positioning component, and a plurality of positioning blocks are also provided on the base, and the cylindrical machine base can be positioned through the positioning blocks, so that the gap size H between the arc-shaped welding groove of the accessory assembly and the outer peripheral surface of the machine base is uniform.

[0008] Further, the positioning assembly includes positioning device one, positioning device two and positioning device three, the accessory group includes accessory pair one, accessory pair two and anti-dropping accessory, the accessory pair one is connected to positioning device one, the accessory pair two is connected to positioning device two, and the anti-dropping accessory is connected to positioning device three; the accessory pair one is positioned by positioning device one, the accessory pair two is positioned by positioning device two, and the anti-dropping accessory is positioned by positioning device three.

[0009] Further, the positioning device 1 includes a flange sleeve 1, a positioning pin 1 and a positioning sleeve 1, the flange sleeve 1 is a stepped shaft structure and is a structure that is small at the top and large at the bottom in the height direction, the upper end of the flange sleeve 1 is provided with a waist-shaped through hole 1, and the positioning pin 1 penetrates the waist-shaped through hole 1 and is arranged on the flange sleeve 1; the accessory pair 1 includes an upper accessory 1 and a lower accessory 1, and a cylinder 1 that is adapted to the mounting hole of the lower accessory 1 is also provided at the lower end of the flange sleeve, a cylinder 2 is provided at the lower end of the cylinder, and a first step is formed between the cylinder 1 and the cylinder 2, the first step performs axial positioning on the lower accessory 1, and the cylinder pair performs center positioning on the mounting hole of the lower accessory 1; The flange sleeve is also provided with a protrusion, which is arranged at the top of the flange sleeve; the positioning sleeve is provided with a barrel, the barrel of the positioning sleeve is matched with the diameter of the protrusion; the positioning sleeve is also provided with a flange, the flange is annular and is arranged around the top of the barrel, the diameter of the outer circumferential surface of the flange is matched with the mounting hole of the upper end accessory; when the mounting hole of the upper end accessory is inserted into the flange sleeve, the positioning pin supports the upper end accessory, thereby axially positioning the upper end accessory; the outer diameter of the flange of the positioning sleeve is matched with the mounting hole of the upper end accessory, so that the central axis of the mounting hole of the upper end accessory coincides with the central axis of the flange, thereby centrally positioning the mounting hole of the upper end accessory.

[0010] Further, the second positioning device comprises a second flange sleeve, a second positioning pin and a second positioning sleeve. The second flange sleeve is in the form of a stepped shaft structure and is a structure that is small at the top and large at the bottom in the height direction. A second waist-shaped through hole is provided at the upper end of the second flange sleeve, and the second positioning pin passes through the second waist-shaped through hole and is arranged on the second flange sleeve; the second pair of accessories comprises an upper-end accessory and a lower-end accessory. A third cylinder that matches the mounting hole of the second lower-end accessory is also provided at the lower end of the second flange sleeve, and a fourth cylinder is provided at the lower end of the third cylinder, and a second step is formed between the third cylinder and the fourth cylinder, and the second step performs axial positioning on the second lower-end accessory, and the third cylinder performs center positioning on the mounting hole of the second lower-end accessory; The flange sleeve 2 is also provided with a protrusion 2, and the protrusion 2 is arranged at the top of the flange sleeve 2. The positioning sleeve 2 is provided with a cylinder 2, and the cylinder 2 of the positioning sleeve 2 is matched with the diameter of the protrusion 2. The positioning sleeve 2 is also provided with a flange 2, and the flange 2 is annular and is arranged around the top of the cylinder 2. The diameter of the outer circumferential surface of the flange 2 is matched with the mounting hole of the upper end accessory 2; when the mounting hole of the upper end accessory 2 is inserted into the flange sleeve 2, the positioning pin 2 supports the upper end accessory 2, thereby axially positioning the upper end accessory 2; the outer diameter of the flange 2 of the positioning sleeve 2 is matched with the mounting hole of the upper end accessory 2, so that the central axis of the mounting hole of the upper end accessory 2 coincides with the central axis of the flange 2, thereby centering the mounting hole of the upper end accessory 2.

[0011] Furthermore, the positioning device three includes a flange sleeve three, to which an anti-slip accessory is connected. The flange sleeve three has a cylinder five, and the diameter of the cylinder five is adapted to the mounting hole of the anti-slip accessory. A circular cylindrical support portion is arranged on the outer circumferential surface of the upper end of the cylinder five. The mounting hole of the anti-slip accessory is sleeved on the outer circumferential surface of the cylinder five, so that the central axis of the mounting hole coincides with the central axis of the cylinder five for center positioning, and the anti-slip accessory is axially positioned by the support portion.

[0012] Furthermore, the positioning device 1 is also provided with a bottom plate 1, which is arranged at the lower end of the cylinder 2, and a cylindrical positioning flange 1 is provided at the lower end of the bottom plate, and the positioning flange 1 and the bottom plate 1 are coaxial with the flange sleeve; the positioning device 2 is also provided with a bottom plate 2, which is arranged at the lower end of the cylinder 4, and a cylindrical positioning flange 2 is provided at the lower end of the bottom plate 2, and the positioning flange 2 and the bottom plate 2 are coaxial with the flange sleeve 2; the positioning device 3 is also provided with a bottom plate 3, and the bottom plate 3 is provided with a cylindrical positioning flange 3 at the lower end of the flange sleeve 3, and the positioning flange 3 and the bottom plate 3 are coaxial with the flange sleeve 3; the base is respectively provided with positioning flanges 1. Grooves 1, 2 and 3 that match the positioning flanges 2 and 3; the diameter of the bottom plate 1 is larger than the diameter of the positioning flange 1, the diameter of the bottom plate 2 is larger than the diameter of the positioning flange 2, and the diameter of the bottom plate 3 is larger than the diameter of the positioning flange 3. The bottom plates 1, 2 and 3 are all provided with a plurality of threaded through holes 1 along the circumference of the positioning flanges 1, 2 and 3. The base is also provided with a threaded through hole 2 that is consistent with the position of the threaded through hole 1 on the bottom plates 1, 2 and 3. Bolts are fixed to the flange sleeve 1, the flange sleeve 2 and the flange sleeve 3 on the base through the threaded through hole 1 and the threaded through hole 2 in turn.

[0013] Furthermore, the plurality of positioning blocks have the same outer circle and outer arc surfaces with the same curvature, and the outer arc surfaces are matched with the inner circle circumference of the lower end of the base.

[0014] The present invention also discloses a method for positioning an assembly welding of accessories, wherein a positioning assembly and a plurality of positioning blocks are arranged on a base. During positioning, the accessory assembly is positioned by the positioning assembly, and the cylindrical machine base is positioned by the plurality of positioning blocks, so that the size of the gap H between the arc-shaped welding groove of the accessory assembly and the outer peripheral surface of the machine base is finally made uniform through the above two positioning steps.

[0015] Furthermore, the specific steps of a method for welding and positioning accessories are as follows: S1. Connection between the positioning assembly and the base: fix the base in the operating area, and fix the positioning flanges 1, 2 and 3 at the lower ends of the positioning device 1, the positioning device 2 and the positioning device 3 in the grooves 1, 2 and 3 of the base by bolts, thereby connecting the positioning assembly to the base; S2. Positioning the machine base: vertically place the machine base to be assembled with the accessory group on the base, and the inner circumference of the lower end of the machine base cooperates with the positioning block on the base to position the machine base on the base; S3. Remove the positioning pins and positioning sleeves of the positioning device 1 and the positioning device 2, and insert the mounting holes of the lower end fitting 1 and the lower end fitting 2 into the flange sleeve 1 and the flange sleeve 2 until the inner circumference of the mounting holes contacts the outer circumference of the cylinder 2 and the cylinder 4, and the lower end surface of the mounting hole of the lower end fitting 1 contacts the first step; the lower end surface of the mounting hole of the lower end fitting 2 contacts the second step, and the center positioning and axial positioning of the mounting holes of the lower end fitting 1 and the lower end fitting 2 are completed; so that the welding gap between the arc welding groove of the lower end fitting 1 and the lower end fitting 2 and the outer circumference of the machine base is uniform; S4, install the removed positioning pin 1 and positioning sleeve 1 onto flange sleeve 1, install the positioning pin 2 and positioning sleeve 2 onto flange sleeve 2, and then install the upper end accessory 1 onto the positioning sleeve 1 at the top of the positioning device 1, the lower end of the upper end accessory 1 contacts the positioning pin 1 to complete the center positioning and axial positioning of the mounting hole of the upper end accessory 1, so that the welding gap between the upper end accessory 1 and the outer peripheral surface of the machine base is uniform; at the same time, install the upper end accessory 2 onto the positioning sleeve 2 at the top of the positioning device 2, the lower end of the upper end accessory 2 contacts the positioning pin 2 to complete the center positioning and axial positioning of the mounting hole of the upper end accessory 2, so that the welding gap between the upper end accessory 2 and the outer peripheral surface of the machine base is uniform; S5. Install the anti-slip fitting to the upper end of the flange sleeve three. The diameter of the cylinder five provided on the flange sleeve three is compatible with the mounting hole of the anti-slip fitting. When the anti-slip fitting is installed to the upper end of the flange sleeve three, the lower end of the anti-slip fitting contacts the upper end surface of the support part, thereby completing the center positioning and axial positioning of the anti-slip fitting, so that the welding gap between the anti-slip fitting and the outer peripheral surface of the machine base is uniform.

[0016] Furthermore, after completing the S1-S5 positioning steps, the welding gaps between the accessory pair one, the accessory pair two and the anti-dropping accessory and the outer peripheral surface of the machine base are uniform, and then the gaps are welded, so that the accessory pair one, the accessory pair two and the anti-dropping accessory are welded to the outer peripheral surface of the machine base. After welding is completed, remove the positioning pin one, the positioning pin two, the positioning sleeve one and the positioning sleeve two, and separate the machine base assembled with the accessory group from the accessory group welding positioning device.

[0017] The beneficial effects of the present invention are: (1) A positioning assembly and a plurality of positioning blocks are provided on the base. During positioning, the accessory group is positioned by the positioning assembly, and the cylindrical machine base is positioned by the plurality of positioning blocks. Thus, the size of the gap H between the arc-shaped welding groove of the accessory group and the outer peripheral surface of the machine base is uniform through the above two positioning steps.

[0018] (2) The machine base adopts a vertical position to assemble the accessories group, which can complete the precise and rapid assembly of two pairs of accessories at one time, avoiding the operational risk of unstable accessories during horizontal assembly.

[0019] (3) By setting a positioning component on the base, the center positioning accuracy of the mounting holes of the two pairs of accessories can be achieved, and the assembly accuracy of the two pairs of accessories and the machine base can be stably controlled. The positioning device can ensure that the lower surface of the accessory is parallel to the lower end surface of the machine base, avoiding the tilting phenomenon of the accessory in the background technology.

[0020] (4) Compared with the prior art in which two groups of accessories are positioned separately, the present invention can realize the simultaneous positioning of two pairs of accessories, shortening the operation time from 1 hour to 15 minutes, greatly reducing the operation time and improving the assembly efficiency of the accessory assembly welding.

[0021] (5) The positioning assembly provided in the present invention ensures the welding gap between the accessory group and the outer peripheral surface of the machine base, improving the situation in the background technology where gaskets need to be placed manually, thereby shortening the operation steps and ensuring the consistency of the assembly quality before welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the accessory assembly welding positioning device and the machine base in an embodiment of the present invention; Figure 2 A schematic diagram of an accessory in the accessory set of the present invention; Figure 3 It is a structural schematic diagram of a fitting assembly welding positioning device in an embodiment of the present invention; Figure 4 is a schematic structural diagram of a base in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a positioning device 1 in an embodiment of the present invention; Figure 6 is a schematic diagram of a second positioning device in an embodiment of the present invention; Figure 7 Schematic diagram of positioning device 3 in an embodiment of the present invention; Figure 8 It is a schematic diagram of the assembly structure of the accessory welding positioning device and the machine base in an embodiment of the present invention.

[0023] In the figure: 1. base, 11. positioning block, 12. groove 1, 13, groove 2, 14. groove 3, 15. threaded through hole 2, 16. fixing hole, 2. positioning device, 21. positioning device 1, 211. flange sleeve 1, 2111. bottom plate 1, 2112. cylinder 2, 2113. cylinder 1, 2114. first step, 2115. flange sleeve 1 upper end, 2116. protrusion 1, 2117. threaded through hole 1, 2118. positioning flange 1, 2119. waist-shaped through hole 1, 212. positioning pin 1, 213. positioning sleeve 1, 2131. flange 1, 2132. barrel 1, 22. positioning device 2, 221. flange sleeve 2, 2211. bottom plate 2, 2212. cylinder 4, 2213 .Cylinder three, 2214. Second step, 2215. Upper end of flange sleeve two, 2216. Protrusion two, 2218. Positioning flange two, 2219. Waist-shaped through hole two, 222. Positioning pin two, 223. Positioning sleeve two, 2231. Flange two, 2232. Cylinder two, 23. Positioning device three, 231. Flange sleeve three, 2311. Support part, 2312. Cylinder five, 3. Accessory group, 31. Accessory pair one, 311. Upper end accessory one, 312. Lower end accessory one, 32. Accessory pair two, 321. Upper end accessory two, 322. Lower end accessory two, 33. Anti-slip accessory, 34. Arc-shaped welding groove, 35. Mounting hole, 4. Machine base, H. Indicates the gap between the arc-shaped welding groove and the outer peripheral surface of the machine base. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] To make the purpose, technical solution and advantages of the embodiments of the invention more clear, the following will be combined with the appended drawings of the embodiments of the invention to Figure 1-8 , clearly and completely describe the technical solutions of the embodiments of the invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention. Example

[0028] like Figure 1 and Figure 2 As shown, the accessory assembly welding positioning device of the present application includes a base 1 and a positioning component 2 connected to the base 1, the positioning component 2 is connected to the accessory group 3, one end of the accessory group 3 is provided with an arc-shaped welding groove 34, and the other end is provided with a mounting hole 35; the accessory group 3 is positioned by the mounting hole 35 through the positioning component 2 to position the accessory group 3, and a plurality of positioning blocks 11 for positioning the cylindrical machine base 4 are provided on the base 1, and the cylindrical machine base can be erected on the base to position the machine base 4, so that the gap size H between the arc-shaped welding groove 34 of the accessory group and the outer wall of the machine base 4 is uniform, thereby improving the accuracy of assembly welding positioning.

[0029] like Figure 8As shown, the positioning assembly 2 includes a positioning device 1 21, a positioning device 22 and a positioning device 3 23, and the accessory group 3 includes an accessory pair 1 31, an accessory pair 2 32 and an anti-slip accessory 33. The accessory pair 1 31 is connected to the positioning device 1 21, the accessory pair 2 32 is connected to the positioning device 2 22, and the anti-slip accessory 33 is connected to the positioning device 3 23; the accessory pair 1 31 is positioned by the positioning device 1 21, the accessory pair 2 32 is positioned by the positioning device 22, and the anti-slip accessory 33 is positioned by the positioning device 3 33. Thus, the gap size between the arc-shaped welding groove 34 at one end of the accessory pair 1 31, the accessory pair 2 32 and the anti-slip accessory 33 of the accessory group 3 and the outer peripheral surface of the machine base 4 is made uniform. By setting up a positioning component 2 including a positioning device 1 21, a positioning device 22 and a positioning device 3 23, the accessory pair 1 31, the accessory pair 2 32 and the anti-slip accessory 33 are accurately positioned, thereby improving the problem in the background technology that each time the gap size between the accessory and the outer peripheral surface of the machine base is positioned, the positioning size of the accessory assembly on the machine base needs to be manually measured after spot welding with process ribs, and the precision control is not good enough. At the same time, the assembly efficiency and positioning accuracy are improved.

[0030] like Figure 5 and Figure 8 As shown, the positioning device 21 includes a flange sleeve 211, a positioning pin 212 and a positioning sleeve 213. The flange sleeve 211 is a stepped shaft structure and has a small upper part and a large lower part in the height direction. The upper end of the flange sleeve 211 is provided with a waist-shaped through hole 2119, and the positioning pin 213 passes through the waist-shaped through hole 2119 and is arranged on the flange sleeve 211; the accessory pair 31 includes an upper end accessory 311 and a lower end accessory 312. The lower end of the flange sleeve 211 is also provided with a cylinder 2113 that is compatible with the mounting hole of the lower end accessory 311. The lower end of the cylinder 2113 is provided with a cylinder 2112. A first step 2114 is formed between the cylinder 2113 and the cylinder 2112. The first step 2114 performs axial positioning on the lower end accessory 312, and the cylinder 2113 performs center positioning on the mounting hole 35 of the lower end accessory 312.

[0031] like Figure 3 and Figure 8As shown, the flange sleeve 211 is further provided with a protrusion 2116, which is arranged at the top of the flange sleeve 211, and the positioning sleeve 213 is provided with a barrel 2132, and the barrel 2132 of the positioning sleeve 213 is adapted to the diameter of the protrusion 2116. The positioning sleeve 213 is also provided with a flange 2131, which is annular and arranged around the top of the barrel 2132, and the outer circumferential surface of the flange 2131 is The diameter is matched with the mounting hole 35 of the upper fitting 311; when the mounting hole 35 of the upper fitting 311 is inserted into the flange sleeve 211, the positioning pin 212 will support the upper fitting 311 at a certain height, thereby axially positioning the upper fitting 311; the outer diameter of the flange 2131 of the positioning sleeve 211 is matched with the mounting hole 35 of the upper fitting 311, thereby centering the upper fitting 311.

[0032] When positioning the upper end fitting 311 of the fitting pair 31, the positioning pin 212 provided in the positioning device 21 will support the upper end fitting 311 at a certain height to complete the axial positioning (z direction) of the upper end fitting 311. The top protrusion 2116 of the flange sleeve 211 is provided with a positioning sleeve 212 that matches it. The diameter of the flange 2131 of the positioning sleeve 213 is adapted to the mounting hole 35 of the upper end fitting 311 and can rotate relatively. The mounting hole 35 of the upper end fitting 311 is sleeved on the outer peripheral surface of the flange 2131 of the positioning sleeve 213, so that the central axis of the mounting hole 35 of the upper end fitting 311 coincides with the central axis of the flange 2131 for center positioning, thereby the mounting hole 35 of the upper end fitting 311 can be center positioned, and at the same time, it can be rotated in the horizontal direction (x, y direction) for fine adjustment, so that the gap between the arc welding groove 34 of the upper end fitting 311 and the outer wall of the machine base 4 is uniform. Thereby, the gap size H (in the three directions of x, y and z) between the arc-shaped welding groove 34 of the upper end fitting 311 and the outer wall of the machine base 4 is uniform.

[0033] like Figure 6 and Figure 8As shown, the second positioning device 22 includes a second flange sleeve 221, a second positioning pin 222 and a second positioning sleeve 223. The second flange sleeve 221 is a stepped shaft structure and has a small upper and a large lower structure in the height direction. The upper end of the second flange sleeve 221 is provided with a second waist-shaped through hole 2219. The second positioning pin 222 penetrates the second waist-shaped through hole 2219 and is arranged on the second flange sleeve 221. The second accessory pair 32 includes an upper end accessory 321 and a lower end accessory 322. The lower end of the flange sleeve 221 is also provided with a cylinder 3 2213 adapted to the mounting hole 35 of the lower end fitting 2 322, and the lower end of the cylinder 3 2213 is provided with a cylinder 4 2212, and a second step 2214 is formed between the cylinder 3 2213 and the cylinder 4 2212, and the second step 2214 performs axial positioning on the lower end fitting 2 322, and the cylinder 3 2213 performs center positioning on the mounting hole 35 of the lower end fitting 2 322; The flange sleeve 221 is also provided with a second protrusion 2216, and the second protrusion 2216 is arranged at the top of the flange sleeve 221. The positioning sleeve 223 is provided with a second barrel 2232, and the barrel 2232 of the positioning sleeve 223 is adapted to the diameter of the second protrusion 2216. The positioning sleeve 2216 is also provided with a second flange 2231, and the second flange 2231 is annular and is arranged around the top of the barrel 2232. The diameter of the outer circumference of the flange 2231 is adapted to the mounting hole 35 of the upper end fitting 2 321; when the upper end fitting After the mounting hole 35 of the second 321 is inserted into the flange sleeve 221, the positioning pin 222 will support the upper-end accessory 321 at a certain height, thereby axially positioning the upper-end accessory 321 (in the z direction); the outer diameter of the flange 2216 of the positioning sleeve 223 is compatible with the mounting hole 35 of the upper-end accessory 321, and the central axis of the flange 2216 of the positioning sleeve 223 coincides with the central axis of the mounting hole 35 of the upper-end accessory 321, thereby centering the mounting hole 35 of the upper-end accessory 321 (in the x and y directions).

[0034] By using the two positioning devices to position the accessories, the problem in the background technology that the distance dimensions in the x, y, and z directions between the mounting hole 35 of the accessory and the center of the machine base 4 cannot be measured and can only be controlled indirectly and positioned by marking is solved. This further improves the assembly and welding positioning accuracy of the accessory group, while avoiding the problem that the accessories in the background technology are prone to tilting, and reduces the operational complexity of the positioning of the accessory group.

[0035] like Figure 2 , Figure 7 and Figure 8As shown, the positioning device 3 23 includes a flange sleeve 3 231, and an anti-slip fitting is connected to the positioning device 3 23. The flange sleeve 3 23 has a cylinder 5 2312, and the diameter of the cylinder 5 2312 is adapted to the mounting hole 35 of the anti-slip fitting 33. A circular cylindrical support portion 2311 is arranged on the outer circumference of the upper end of the cylinder 5 2312. The anti-slip fitting 33 is centrally positioned in its mounting hole 35 by the cylinder 5 2312, and the anti-slip fitting 33 is axially positioned by the support portion 2311. When the positioning device 3 23 positions the anti-slip fitting 33, as shown in FIG. Figure 2 , Figure 7 and Figure 8 As shown, the positioning device three 23 is connected to an anti-slip fitting 33, and the flange sleeve two 231 has a cylinder five 2312. The diameter of the cylinder five 2312 is adapted to the mounting hole 35 of the anti-slip fitting 33. When the mounting hole 35 of the anti-slip fitting 33 is sleeved on the outer circumference of the cylinder five 2312, the central axis of the mounting hole 35 of the anti-slip fitting 33 and the central axis of the cylinder five 2312 are overlapped to perform center positioning (x, y direction). A circular cylindrical support portion 2311 is arranged on the outer circumferential surface of the upper end of the cylinder four 2312, and the anti-slip fitting 33 can be inserted into the cylinder five 2312. At this time, the outer circumferential surface of the cylinder five 2312 contacts the inner circumferential surface of the mounting hole of the anti-slip fitting 33 and can rotate in the circumferential direction, thereby centering the mounting hole 35 of the anti-slip fitting 33, that is, achieving a uniform gap size between the arc-shaped welding groove of the anti-slip fitting and the machine base on the horizontal plane (x, y direction); when the anti-slip fitting 33 falls to the point where its lower end contacts the circular cylindrical support portion 2311 arranged on the outer circumferential surface of the upper end of the cylinder five 2312, the anti-slip fitting 33 stops moving downward, and the anti-slip fitting 33 is positioned at a fixed height by the support portion 2311, thereby axially (z direction) positioning the anti-slip fitting 33. Thus, the spatial positioning of the anti-slip fitting 33 is completed, so that the gap size H between the arc-shaped welding groove of the anti-slip fitting and the outer peripheral surface of the machine base in space (x, y, z directions) is uniform.

[0036] like Figure 1 and 2 As shown, a plurality of positioning blocks 11 are also provided on the base, and the positioning blocks 11 have the same outer circle and an outer circumferential arc surface with the same curvature, and the outer circumferential arc surface cooperates with the inner circumferential surface of the lower end of the base 4. By providing the positioning blocks 11 on the base 1, the base 4 to be assembled with the accessory group 3 can be placed upright and stably on the base 1. This assembly method using a vertical position avoids the problem that the base is clamped on the welding positioner in a horizontal posture in the prior art. When assembling the accessories, the position needs to be adjusted and measured many times, and a gap needs to be reserved between the welding of the accessory group and the outer circumferential surface of the base. The stability of the entire accessory assembly is poor, and there is a safety hazard.

[0037] The present invention also provides a method for positioning an assembly welding of accessories, wherein a positioning assembly 2 and a plurality of positioning blocks 11 are arranged on a base. When positioning is performed, the accessory assembly 3 is positioned by the positioning assembly 2, and the cylindrical machine base 4 is positioned by the plurality of positioning blocks 11, so that the size of the gap H between the arc-shaped welding groove 34 of the accessory assembly and the outer peripheral surface of the machine base 4 is finally made uniform through the above two positioning steps.

[0038] like Figure 1-8 As shown, the specific steps of positioning using the above-mentioned accessory assembly welding positioning device are as follows: S1. Connection between the positioning assembly 2 and the base 1: fix the base 1 in the operation area, and fix the positioning flange 1 2116, the positioning flange 2216 and the positioning flange 3 2214 at the lower ends of the positioning device 1 21, the positioning device 2 22 and the positioning device 3 23 in the groove 1 12, the groove 2 13 and the groove 3 14 of the base respectively by bolts, so as to connect the positioning assembly 2 to the base 1; S2, positioning the machine base 2: vertically place the machine base to be assembled with the accessory set 2 on the base 1, and the inner circumference of the lower end of the machine base 4 cooperates with the positioning block 11 on the base 1 to position the machine base 4 on the base 1; S3. Remove the positioning pin 1 212, the positioning pin 222, the positioning sleeve 1 213 and the positioning sleeve 2 223 of the positioning device 1 21 and the positioning device 2 22, and insert the mounting holes 35 of the lower end fitting 1 311 and the lower end fitting 2 321 into the flange sleeve 1 211 and the flange sleeve 2 221 respectively until the inner circumference of the mounting hole 35 contacts the outer circumference of the cylinder 2 2114 and the cylinder 4 2214 respectively, and the lower end surface of the mounting hole 35 of the lower end fitting 1 312 contacts the first step 2114; the lower end surface of the mounting hole 35 of the lower end fitting 2 322 contacts the second step 2214, and the center positioning and axial positioning of the mounting holes 35 of the lower end fitting 1 312 and the lower end fitting 2 322 are completed; so that the welding gap between the arc-shaped welding groove 35 of the lower end fitting 1 312 and the lower end fitting 2 322 and the outer circumference of the machine base 4 is uniform; S4, install the removed positioning pin 1 212 and positioning sleeve 1 213 onto flange sleeve 1 211, install the positioning pin 222 and positioning sleeve 223 onto flange sleeve 221, and then install the upper end fitting 1 311 onto the positioning sleeve 1 213 at the top of the positioning device 1, the lower end of the upper end fitting 1 311 contacts the positioning pin 1 213 to complete the center positioning and axial positioning of the mounting hole 35 of the upper end fitting 1 311, so that the welding gap between the arc-shaped welding groove of the upper end fitting 1 311 and the outer peripheral surface of the machine base 4 is uniform; at the same time, install the upper end fitting 2 321 onto the positioning sleeve 2 213 at the top of the positioning device 2, the lower end of the upper end fitting 2 321 contacts the positioning pin 222 to complete the center positioning and axial positioning of the mounting hole 35 of the upper end fitting 2 321, so that the welding gap between the arc-shaped welding groove of the upper end fitting 2 321 and the outer peripheral surface of the machine base 4 is uniform; S5. Install the anti-slip fitting 33 to the upper end of the positioning device three 23. The diameter of the cylinder five 2312 provided on the flange sleeve three 231 is adapted to the mounting hole 35 of the anti-slip fitting 33. When the anti-slip fitting 33 is installed to the upper end of the flange sleeve three 231, the lower end of the anti-slip fitting 33 contacts the upper end surface of the support portion 2311, thereby completing the center positioning and axial positioning of the anti-slip fitting 33, so that the welding gap size between the arc-shaped welding groove 34 of the anti-slip fitting 33 and the outer peripheral surface of the machine base 4 is uniform.

[0039] like Figure 8 As shown, after completing the S1-S5 positioning steps, the welding gaps between the lower end accessory pair 31, the upper end accessory pair 32 and the anti-slip accessories 33 and the outer peripheral surface of the base 4 are uniform, and then the gaps are welded to weld the lower end accessory pair 31, the upper end accessory pair 32 and the anti-slip accessories 33 to the outer peripheral surface of the base 4. After welding is completed, the positioning pin 212 and the positioning sleeve 213 are removed, and the base 4 assembled with the accessory group 3 is separated from the accessory group welding positioning device to complete the assembly of the accessory positioning group welding.

[0040] The above-mentioned positioning device and positioning method can achieve the center positioning accuracy of the mounting hole 35 of the accessory group 2, and the assembly accuracy can be stably controlled; the accessory assembly welding positioning operation time is greatly reduced, from 1 hour to 15 minutes; one person can complete the assembly welding positioning operation using the positioning device, thereby reducing production costs; the welding gap size between the arc-shaped welding groove 34 of the accessory group 2 and the outer peripheral surface of the machine base 4 is ensured by the accessory assembly welding positioning device of the present invention, and there is no need to place gaskets manually, thus shortening the operation steps and ensuring the consistency of assembly quality before welding; the accessory assembly welding positioning device of the present invention can achieve positioning in the x, y, and z directions by spatially positioning the accessory group 2, thereby ensuring that the lower surface of the accessory group 2 is parallel to the lower end surface of the machine base 4, so that the accessory is not tilted.

[0041] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Technicians in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. A device for positioning and welding accessories, comprising a base, characterized in that: It also includes a positioning component, which is connected to the base, and an accessory group is connected to the positioning component. One end of the accessory group is provided with an arc-shaped welding groove, and the other end is provided with a mounting hole; the accessory group is positioned by positioning the mounting hole through the positioning component, and a plurality of positioning blocks are also provided on the base, and the cylindrical machine base can be positioned by the positioning blocks, so that the gap size H between the arc-shaped welding groove of the accessory group and the outer peripheral surface of the machine base is uniform.

2. The accessory assembly welding positioning device according to claim 1, characterized in that: The positioning assembly includes positioning device one, positioning device two and positioning device three, the accessory group includes accessory pair one, accessory pair two and anti-slip accessories, the accessory pair one is connected to positioning device one, the accessory pair two is connected to positioning device two, and the anti-slip accessories are connected to positioning device three; the accessory pair one is positioned by positioning device one, the accessory pair two is positioned by positioning device two, and the anti-slip accessories are positioned by positioning device three.

3. The accessory assembly welding positioning device according to claim 2, characterized in that: The positioning device 1 includes a flange sleeve 1, a positioning pin 1 and a positioning sleeve 1. The flange sleeve 1 is a stepped shaft structure and has a structure that is smaller at the top and larger at the bottom in the height direction. A waist-shaped through hole 1 is provided at the upper end of the flange sleeve 1, and the positioning pin 1 penetrates the waist-shaped through hole 1 and is arranged on the flange sleeve 1; the accessory pair 1 includes an upper accessory 1 and a lower accessory 1, and a cylinder 1 that is adapted to the mounting hole of the lower accessory 1 is also provided at the lower end of the flange sleeve, and a cylinder 2 is provided at the lower end of the cylinder, and a first step is formed between the cylinder 1 and the cylinder 2, and the first step performs axial positioning on the lower accessory 1, and the cylinder pair performs center positioning on the mounting hole of the lower accessory 1; The flange sleeve is also provided with a protrusion, which is arranged at the top of the flange sleeve; the positioning sleeve is provided with a barrel, the barrel of the positioning sleeve is matched with the diameter of the protrusion; the positioning sleeve is also provided with a flange, the flange is annular and is arranged around the top of the barrel, the diameter of the outer circumferential surface of the flange is matched with the mounting hole of the upper end accessory; when the mounting hole of the upper end accessory is inserted into the flange sleeve, the positioning pin supports the upper end accessory, thereby axially positioning the upper end accessory; the outer diameter of the flange of the positioning sleeve is matched with the mounting hole of the upper end accessory, so that the central axis of the mounting hole of the upper end accessory coincides with the central axis of the flange, thereby centrally positioning the mounting hole of the upper end accessory.

4. The accessory assembly welding positioning device according to claim 2, characterized in that: The second positioning device includes a second flange sleeve, a second positioning pin and a second positioning sleeve. The second flange sleeve is in the form of a stepped shaft structure and is a structure that is small at the top and large at the bottom in the height direction. A second waist-shaped through hole is provided at the upper end of the second flange sleeve. The second positioning pin penetrates through the second waist-shaped through hole and is arranged on the second flange sleeve; the second pair of accessories includes an upper-end accessory and a lower-end accessory. The lower end of the second flange sleeve is also provided with a cylinder three that matches the mounting hole of the lower-end accessory. A cylinder four is provided at the lower end of the cylinder three, and a second step is formed between the cylinder three and the cylinder four. The second step performs axial positioning on the lower-end accessory two, and the cylinder three performs center positioning on the mounting hole of the lower-end accessory two; The flange sleeve 2 is also provided with a protrusion 2, and the protrusion 2 is arranged at the top of the flange sleeve 2. The positioning sleeve 2 is provided with a cylinder 2, and the cylinder 2 of the positioning sleeve 2 is matched with the diameter of the protrusion 2. The positioning sleeve 2 is also provided with a flange 2, and the flange 2 is annular and is arranged around the top of the cylinder 2. The diameter of the outer circumferential surface of the flange 2 is matched with the mounting hole of the upper end accessory 2; when the mounting hole of the upper end accessory 2 is inserted into the flange sleeve 2, the positioning pin 2 supports the upper end accessory 2, thereby axially positioning the upper end accessory 2; the outer diameter of the flange 2 of the positioning sleeve 2 is matched with the mounting hole of the upper end accessory 2, so that the central axis of the mounting hole of the upper end accessory 2 coincides with the central axis of the flange 2, thereby centering the mounting hole of the upper end accessory 2.

5. The accessory assembly welding positioning device according to claim 2, characterized in that: The positioning device three includes a flange sleeve three, and an anti-slip accessory is connected to the positioning device three. The flange sleeve three has a cylinder five, and the diameter of the cylinder five is adapted to the mounting hole of the anti-slip accessory. A circular cylindrical support portion is arranged on the outer circumferential surface of the upper end of the cylinder five, and the mounting hole of the anti-slip accessory is sleeved on the outer circumferential surface of the cylinder five, so that the central axis of the mounting hole coincides with the central axis of the cylinder five for center positioning, and the anti-slip accessory is axially positioned by the support portion.

6. The accessory assembly welding positioning device according to claim 2, characterized in that: The positioning device 1 is also provided with a bottom plate 1, which is arranged at the lower end of the cylinder 2, and a cylindrical positioning flange 1 is provided at the lower end of the bottom plate, and the positioning flange 1 and the bottom plate 1 are coaxial with the flange sleeve; the positioning device 2 is also provided with a bottom plate 2, which is arranged at the lower end of the cylinder 4, and a cylindrical positioning flange 2 is provided at the lower end of the bottom plate 2, and the positioning flange 2 and the bottom plate 2 are coaxial with the flange sleeve 2; the positioning device 3 is also provided with a bottom plate 3, and the bottom plate 3 is provided with a cylindrical positioning flange 3 at the lower end of the flange sleeve 3, and the positioning flange 3 and the bottom plate 3 are coaxial with the flange sleeve 3; the base is respectively provided with positioning flanges 1 and 2. Grooves 1, 2 and 3 that match the positioning flanges 2 and 3; the diameter of the base plate 1 is larger than the diameter of the positioning flange 1, the diameter of the base plate 2 is larger than the diameter of the positioning flange 2, and the diameter of the base plate 3 is larger than the diameter of the positioning flange 3; the base plates 1, 2 and 3 are all provided with a plurality of threaded through holes 1 along the circumference of the positioning flanges 1, 2 and 3; the base is also provided with a threaded through hole 2 that is consistent in position with the threaded through hole 1 on the base plates 1, 2 and 3; bolts are fixed to the base through the threaded through hole 1 and the threaded through hole 2 in turn.

7. The accessory assembly welding positioning device according to claim 1, characterized in that: The plurality of positioning blocks have the same outer circle and outer arc surfaces with the same curvature, and the outer arc surfaces are matched with the inner circle circumference of the lower end of the base.

8. A method for welding and positioning accessories, characterized in that: A positioning assembly and a plurality of positioning blocks are provided on the base. During positioning, the accessory group is positioned by the positioning assembly, and the cylindrical machine base is positioned by the plurality of positioning blocks, so that the size of the gap H between the arc-shaped welding groove of the accessory group and the outer peripheral surface of the machine base is finally made uniform through the above two positioning steps.

9. The method for assembly welding and positioning of accessories according to claim 8, characterized in that: The specific steps are: S1. Connection between the positioning assembly and the base: fix the base in the operating area, and fix the positioning flanges 1, 2 and 3 at the lower ends of the positioning device 1, the positioning device 2 and the positioning device 3 in the grooves 1, 2 and 3 of the base by bolts, thereby connecting the positioning assembly to the base; S2. Positioning the machine base: vertically place the machine base to be assembled with the accessory group on the base, and the inner circumference of the lower end of the machine base cooperates with the positioning block on the base to position the machine base on the base; S3. Remove the positioning pins and positioning sleeves of the positioning device 1 and the positioning device 2, and insert the mounting holes of the lower end fitting 1 and the lower end fitting 2 into the flange sleeve 1 and the flange sleeve 2 until the inner circumference of the mounting holes contacts the outer circumference of the cylinder 2 and the cylinder 4, and the lower end surface of the mounting hole of the lower end fitting 1 contacts the first step; the lower end surface of the mounting hole of the lower end fitting 2 contacts the second step, and the center positioning and axial positioning of the mounting holes of the lower end fitting 1 and the lower end fitting 2 are completed; so that the welding gap between the arc welding groove of the lower end fitting 1 and the lower end fitting 2 and the outer circumference of the machine base is uniform; S4, install the removed positioning pin 1 and positioning sleeve 1 onto flange sleeve 1, install the positioning pin 2 and positioning sleeve 2 onto flange sleeve 2, and then install the upper end accessory 1 onto the positioning sleeve 1 at the top of the positioning device 1, the lower end of the upper end accessory 1 contacts the positioning pin 1 to complete the center positioning and axial positioning of the mounting hole of the upper end accessory 1, so that the welding gap between the upper end accessory 1 and the outer peripheral surface of the machine base is uniform; at the same time, install the upper end accessory 2 onto the positioning sleeve 2 at the top of the positioning device 2, the lower end of the upper end accessory 2 contacts the positioning pin 2 to complete the center positioning and axial positioning of the mounting hole of the upper end accessory 2, so that the welding gap between the upper end accessory 2 and the outer peripheral surface of the machine base is uniform; S5. Install the anti-slip fitting to the upper end of the flange sleeve three. The diameter of the cylinder five provided on the flange sleeve three is compatible with the mounting hole of the anti-slip fitting. When the anti-slip fitting is installed to the upper end of the flange sleeve three, the lower end of the anti-slip fitting contacts the upper end surface of the support part, thereby completing the center positioning and axial positioning of the anti-slip fitting, so that the welding gap between the anti-slip fitting and the outer peripheral surface of the machine base is uniform.

10. The method for assembly welding and positioning of accessories according to claim 8, characterized in that: After completing the S1-S5 positioning steps, the welding gaps between the accessory pair one, the accessory pair two and the anti-dropping accessory and the outer peripheral surface of the machine base are uniform, and then the gaps are welded to weld the accessory pair one, the accessory pair two and the anti-dropping accessory to the outer peripheral surface of the machine base. After welding is completed, remove the positioning pin one, the positioning pin two, the positioning sleeve one and the positioning sleeve two, and separate the machine base assembled with the accessory group from the accessory group welding positioning device.

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