An eccentric adjustable welding positioner for eccentric cylinder parts and method of use

Abstract

The application discloses an eccentric adjustable welding positioner for eccentric cylinder parts and a welding position method. The positioner comprises a base, a driving end box and an eccentric clamp arranged on a rotary support. A screw-nut transmission mechanism is arranged in the eccentric clamp and moves along an eccentric guide axis. The driving clamp assembly is continuously adjustable relative to the eccentric distance of the rotary axis. An eccentric cylinder support is arranged on the base and can move and lock in the horizontal direction. The support has a height adjusting mechanism and a support part for supporting the outer circle of the eccentric cylinder. The application can accurately adjust the eccentric distance and the support position, so that different specifications of eccentric cylinder parts can maintain a stable and appropriate posture during welding, improve the welding seam forming quality and welding efficiency, and reduce the cost of tool replacement and adjustment.

Description

Technical Field

[0001] This invention belongs to the field of clamping and displacement technology for eccentric cylinder parts, and relates to an eccentric adjustable welding positioner for eccentric cylinder parts and its usage method. Background Technology

[0002] Eccentric cylinder parts are common key functional components in the mechanical field, frequently used in petrochemical, energy equipment, and other industries. Welding is a crucial process in the manufacturing of eccentric cylinder parts, and the role of a welding positioner is to maintain the spatial posture of the workpiece in the optimal position for processing through real-time, continuous attitude adjustment. With the continuous development of industrial automation and manufacturing technology, the demand for welding positioners of eccentric cylinder parts of different sizes is gradually increasing, thus requiring optimized design of welding positioners for such parts.

[0003] For cylindrical parts with eccentric characteristics, the misalignment of the eccentric axis and geometric center can cause certain machining difficulties. Traditional eccentric cylindrical parts are usually handled with fixed fixtures, which cannot flexibly adjust the eccentricity. Some improved positioners typically adjust the eccentricity using a four-jaw chuck or shims, relying on manual experience, resulting in low adjustment efficiency and a small adjustable distance, thus limiting the applicability of the positioner. When processing eccentric cylindrical parts with different diameters, lengths, or eccentricities, the positioner must be replaced or adjusted, which not only increases production costs but also reduces work efficiency.

[0004] Therefore, positioners applicable to eccentric cylindrical parts of various sizes must have the ability to flexibly adjust the eccentricity. By adjusting the eccentricity, the eccentric axis of the eccentric cylindrical part is made to coincide with the geometric center, thus ensuring the geometric stability of the eccentric cylindrical part during processing. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and propose an eccentric adjustable welding positioner and its usage method for eccentric cylinder parts, so as to realize stepless and precise adjustment of the clamp eccentricity, and realize multi-dimensional adjustment of the eccentric cylinder support through linear guide rail and lifting mechanism to adapt to the welding needs of eccentric cylinder parts of different specifications.

[0006] To achieve the above objectives, the present invention employs the following technical solutions: An eccentric adjustable welding positioner for eccentric cylinder parts includes a base and an active end housing disposed on one side of the base. The active end housing is provided with a drive assembly, and a slewing bearing rotatable about the rotation axis of the positioner is mounted on its front side. An eccentric clamp is mounted on the slewing bearing for clamping the eccentric cylinder part and rotating with the slewing bearing about the rotation axis. At least one eccentric cylinder support is provided on the base, and the eccentric cylinder supports are spaced apart along the axial direction of the eccentric cylinder part for auxiliary support of the eccentric cylinder part. The base is provided with a horizontal guide mechanism for guiding the eccentric cylinder bracket to move in the horizontal direction. The eccentric cylinder bracket can be adjusted in the horizontal direction and locked in place by means of the horizontal guide mechanism. The eccentric cylinder support is provided with a height adjustment mechanism arranged in the vertical direction and a support part connected to the height adjustment mechanism. The support part is used to support the outer circle of the eccentric cylinder part at different height positions. The eccentric clamp is provided with an eccentric adjustment mechanism, which includes a lead screw rotatably arranged along a guide axis eccentrically arranged relative to the rotation axis, a nut assembly threadedly engaged with the lead screw and movable along the guide axis, and a clamping assembly connected to the nut assembly. The clamping assembly is used to clamp the eccentric cylinder part. By driving the lead screw to rotate, the nut assembly and the clamping assembly are moved along the guide axis, so that the eccentricity of the clamping axis of the clamping assembly relative to the rotation axis is continuously adjustable.

[0007] As a preferred embodiment, the horizontal guiding mechanism includes a linear guide rail disposed on the base and a slider mounted on the linear guide rail, with the eccentric cylinder bracket mounted on the slider; the base is provided with a limiting block at the end of the stroke of the linear guide rail to limit the movement stroke of the slider.

[0008] In a preferred embodiment, the height adjustment mechanism includes a vertical guide assembly and a lifting screw assembly mounted on the eccentric cylinder support. The vertical guide assembly includes at least one guide shaft and a linear bearing cooperating with the guide shaft. The lifting screw assembly includes a lifting screw arranged in the vertical direction and a support handwheel connected to the lifting screw. The support part is fixed to the movable end of the lifting screw. Rotating the support handwheel drives the lifting screw to rotate, thereby driving the support part to move up and down in the vertical direction. The support part includes at least one pair of bullseye bearing seats mounted on the support plate of the support and bullseye bearings installed in the bullseye bearing seats, for supporting the eccentric cylinder part and allowing it to rotate.

[0009] As a preferred embodiment, the eccentric cylinder support is provided with a guide rail clamp that cooperates with the linear guide rail, for locking and fixing the position of the eccentric cylinder support on the linear guide rail after it has been adjusted to a predetermined position.

[0010] In a preferred embodiment, the drive assembly includes a reducer and a servo motor. The reducer is mounted on a reducer mounting plate on the front side of the drive end housing. The servo motor is connected to the input end of the reducer, and a drive gear is mounted on the output end of the reducer. The slewing bearing is an external gear slewing bearing, and the drive gear meshes with the external gear ring of the external gear slewing bearing. When the servo motor is working, it drives the external gear slewing bearing and the eccentric clamp to rotate via the reducer and the drive gear.

[0011] In a preferred embodiment, the lead screw is installed in an eccentric adjustment disc fixed to the inner ring of the slewing bearing. The two ends of the lead screw are supported by angular contact ball bearings on the eccentric adjustment disc and are axially positioned by locking nuts. A scale is provided on the side of the eccentric adjustment disc, and a pointer is provided on the component fixedly connected to the clamping assembly. When adjusting the eccentricity, the position of the pointer relative to the scale indicates the current eccentricity.

[0012] In a preferred embodiment, the base includes a base welding frame, adjusting bolts, and a ground mounting plate. The adjusting bolts are installed on both sides of the base welding frame and connected to the ground mounting plate. The levelness is adjusted by adjusting the adjusting bolts to drive the base welding frame to rise and fall as a whole. The ground mounting plate is fixedly connected to the ground by expansion screws.

[0013] As a preferred embodiment, a plurality of eccentric cylinder supports are provided on one side of the base along the extension direction of the horizontal guide mechanism. The plurality of eccentric cylinder supports are arranged at intervals along the direction of the horizontal guide mechanism to support eccentric cylinder parts of different lengths.

[0014] This invention also discloses a method for using an eccentric adjustable welding positioner for eccentric cylinder parts, characterized by comprising the following steps: S1. Record the dimensional parameters of the eccentric cylinder part according to the diameter, length and eccentricity requirements of the part to be processed; S2. Control the drive assembly to return the slewing bearing to the zero position, and place the operating part of the eccentric adjustment mechanism in a position that is easy to operate; S3. According to the eccentricity requirement of the eccentric cylinder part, drive the lead screw in the eccentric adjustment mechanism to rotate, and drive the nut assembly and clamping assembly to move along the guide axis until the indicator indicates the position of the corresponding eccentricity, thereby completing the eccentricity adjustment. S4. The eccentric cylinder part is clamped in the clamping assembly and the eccentric cylinder part is reliably clamped; S5. Move each eccentric cylinder bracket along the horizontal guide mechanism, and when the eccentric cylinder bracket is in a predetermined position that can support the eccentric cylinder part, lock and fix the position of the eccentric cylinder bracket on the horizontal guide mechanism. S6. Drive the height adjustment mechanism to adjust the height of the support part of each eccentric cylinder bracket, so that the support part contacts the outer circle of the eccentric cylinder part, and provides auxiliary support for the eccentric cylinder part; S7. Control the drive assembly to drive the slewing bearing and the eccentric clamp to rotate around the slewing axis, so that the eccentric cylinder part is in the required posture position during the welding process, and the welding operation is completed.

[0015] As a preferred embodiment, in step S3, the correspondence between the scale on the eccentric adjustment plate and the pointer on the clamping assembly is used to determine whether the eccentricity adjustment has reached the predetermined eccentricity of the eccentric cylinder part; in step S7, the welding position of the eccentric cylinder part is controlled by controlling the rotation angle of the servo motor to achieve continuous welding of the weld.

[0016] The present invention has the following advantages: 1. Stepless and precise adjustment of eccentricity: By setting a trapezoidal lead screw, lead screw nut and nut bracket with a three-jaw chuck in the eccentric fixture, and using a scale and pointer to display the eccentricity, the stepless and visual adjustment of the fixture eccentricity can be realized. It can adapt to eccentric cylinder parts with different eccentricities without replacing the core components of the fixture.

[0017] 2. Multi-dimensional adjustable support position and strong adaptability: By integrating linear guide rails and slider structures on the base, as well as lifting screw components and vertical guide components on the eccentric cylinder bracket, the multi-dimensional adjustment of the eccentric cylinder bracket in the horizontal and vertical directions is realized, enabling the positioner to adapt to the support requirements of eccentric cylinder parts of different lengths and diameters, and significantly improving the adaptability to parts of different sizes.

[0018] 3. Modular design and easy assembly / disassembly maintenance: The eccentric clamp module and the eccentric cylinder support module adopt relatively independent structures and can be disassembled and assembled through standard connection methods, which facilitates individual maintenance or replacement, shortens equipment downtime, and improves the convenience of use and maintenance.

[0019] 4. Stable and reliable displacement process, improving welding quality: The eccentric cylinder part is supported at multiple points by bullseye bearings, and the position is locked by guide rail fixtures and self-locking lifting mechanism, which ensures the posture stability of the eccentric cylinder part during the welding displacement process, which is conducive to improving welding quality and part geometric accuracy. Attached Figure Description

[0020] Figure 1 This is a first-view structural schematic diagram of the eccentric adjustable welding positioner of the present invention. Figure 2 This is a schematic diagram of the second-view structure of the eccentric adjustable welding positioner of the present invention; Figure 3 This is a cross-sectional view of the active end housing in this invention. Figure 4 This is a cross-sectional view of the eccentric clamp in this invention.

[0021] 1. Base; 101. Base welded frame; 102. Adjusting bolt; 103. Ground mounting plate; 104. Expansion bolt; 105. Linear guide rail; 106. Slider; 107. Stop; 2. Eccentric cylinder bracket; 201. Bracket mounting base; 202. Lower support plate of bracket; 203. Linear bearing; 204. Guide shaft; 205. Bracket handwheel; 206. Lifting screw assembly; 207. Upper support plate of bracket; 208. Bullseye bearing seat; 209. Bullseye bearing; 210. Guide rail clamp; 3. Active end housing; 301. Housing welded frame; 302. Support frame; 303. Housing Rear cover plate; 304 Housing top cover plate; 305 Reducer mounting plate; 306 Reducer; 307 Gear; 308 Servo motor; 309 External gear slewing bearing; 310 Dust cover; 4 Eccentric clamp; 401 Eccentric adjustment plate; 402 Bearing seat; 403 Bearing outer end cover; 404 Bearing inner end cover; 405 Angular contact ball bearing; 406 Locking nut; 407 Trapezoidal lead screw; 408 Lead screw nut; 409 Nut bracket; 410 Eccentric adjustment handwheel; 411 Adapter flange; 412 Three-jaw chuck; 413 Scale; 414 Pointer. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings.

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] Example: like Figures 1-4 As shown, an eccentric adjustable welding positioner for eccentric cylinder parts includes a base 1, an eccentric cylinder support 2, an active end housing 3, and an eccentric clamp 4. Three movable eccentric cylinder supports 2 are provided on one side of the base 1, and the active end housing 3 is provided on the other side. The eccentric clamp 4 is installed on the outside of the active end housing 3.

[0025] The base 1 main body includes a base welding frame 101. Multiple adjusting bolts 102 are installed on both sides of the base welding frame 101. A ground mounting plate 103 is connected to the lower side of each adjusting bolt 102. The ground mounting plate 103 contacts the ground and is fixed to the ground by expansion screws 104. Adjusting the adjusting bolts 102 ensures that the base welding frame 101 remains level. Two symmetrically distributed linear guide rails 105 are installed on the base welding frame 101. A slider 106 is installed on the linear guide rails 105 and can move horizontally along the linear guide rails. Four symmetrically distributed stops 107 are provided at the ends of the linear guide rails 105 to prevent the slider 106 from veering off the linear guide rails 105 during movement.

[0026] The eccentric cylinder support 2 has two symmetrically distributed support mounting seats 201 at its bottom, which are fixed to the slider 106. A lower support plate 202 is mounted above the support mounting seats 201. Linear bearings 203 are symmetrically mounted on both sides of the lower support plate 202, and a lifting screw assembly 206 is mounted in the middle. A guide shaft 204 cooperates with the linear bearings 203 to provide vertical guidance. A support handwheel 205 is mounted on the lifting screw assembly 206. Rotating the handwheel 205 allows the lifting screw assembly 206 to be adjusted up and down. The lifting screw assembly has a self-locking function to ensure that the support will not move up and down after being moved into position. An upper support plate 207 is mounted above the lifting screw assembly 206 and can be raised and lowered accordingly. It is used to mount a bullseye bearing seat 208. A bullseye bearing 209 is fixed to the bullseye bearing seat 208 to support the eccentric cylinder parts and allow them to rotate. The guide rail clamp 210 is installed on one side of the bracket mounting base 201. By rotating the clamping handle of the guide rail clamp 210, the eccentric cylinder bracket 2 can be locked and fixed on the linear guide rail 105.

[0027] The active end housing 3 includes a welded frame 301, which is mounted on one side of the base 1. Symmetrically distributed support frames 302 are arranged inside. A rear cover plate 303 is mounted on the support frames 302. A top cover plate 304 can be placed above the active end housing 3 for protection and aesthetic enhancement. A reducer mounting plate 305 is mounted on the front of the welded frame 301. A reducer 306 is mounted inside the reducer mounting plate 305. An external gear slewing bearing 309 is mounted on the outside of the reducer mounting plate 305. A gear 307 is mounted at the output end of the reducer 306. A servo motor 308 is mounted at the input end of the reducer 306 to provide driving power. The gear 307 meshes with the external gear ring of the external gear slewing bearing 309. The servo motor 308 transmits torque to the external gear slewing bearing 309 through the reducer 306 and the gear 307, driving the eccentric clamp 4 to rotate. A dust cover 310 is mounted above the external gear slewing bearing 309.

[0028] The eccentric clamp 4 includes an eccentric adjusting disc 401, a bearing housing 402, an angular contact ball bearing 405, a locking nut 406, a trapezoidal lead screw 407, a lead screw nut 408, a nut bracket 409, an eccentric adjusting handwheel 410, an adapter flange 411, a three-jaw chuck 412, a scale 413, and a pointer 414. The eccentric adjusting disc 401 is mounted on the inner ring of the external gear slewing bearing 309 and can rotate with the external gear slewing bearing 309. The bearing housing 402 is symmetrically mounted on the upper and lower sides of the eccentric adjusting disc 401. The angular contact ball bearing 405 is mounted in the bearing housing 402. The locking nut 406 is screwed onto the trapezoidal lead screw 407 and is used for axial positioning of the angular contact ball bearing 405. A trapezoidal lead screw 407 is supported within an eccentric adjustment disc 401 by an angular contact ball bearing 405 and can rotate around its own axis. A lead screw nut 408 is mounted on the trapezoidal lead screw 407, a nut bracket 409 is fitted onto the outside of the lead screw nut 408, an adapter flange 411 is fixed to the nut bracket 409, and a three-jaw chuck 412 is mounted on the front end of the adapter flange 411 for clamping eccentric cylinder parts of different diameters. An eccentric adjustment handwheel 410 is mounted at one end of the trapezoidal lead screw 407. Rotating the eccentric adjustment handwheel 410 drives the trapezoidal lead screw 407 to rotate, thereby causing the lead screw nut 408 and the nut bracket 409 to move up and down along the axial direction of the trapezoidal lead screw 407, thus adjusting the eccentricity. A scale 413 is mounted on one side of the eccentric adjustment disc 401, and a pointer 414 is mounted on one side of the adapter flange 411. During eccentricity adjustment, the eccentricity can be visually read by the position of the pointer 414 corresponding to the scale 413.

[0029] Instructions for use: First, record the relevant parameters according to the size and eccentricity requirements of the eccentric cylinder part to be processed; rotate the servo motor 308 to the zero position so that the eccentricity adjustment handwheel 410 is above the eccentricity fixture 4; adjust the eccentricity according to the required eccentricity by rotating the eccentricity adjustment handwheel 410 to the position indicated by the pointer 414 on the scale 413; clamp the eccentric cylinder part into the three-jaw chuck 412 and tighten it; push each eccentric cylinder bracket 2 along the linear guide rail 105 to the appropriate position and lock it with the guide rail fixture 210; rotate the bracket handwheel 205 to adjust the height of the support plate 207 on the bracket so that the bullseye bearing 209 is in reliable contact with the outer circle of the eccentric cylinder part. Then, control the servo motor 308 to rotate in both directions to drive the eccentric cylinder part to continuously change position during the welding process and complete the welding operation.

[0030] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. An eccentric adjustable welding positioner for eccentric cylinder parts, characterized in that, The device includes a base and an active end housing disposed on one side of the base. The active end housing is equipped with a drive assembly, and a slewing bearing rotatable about the rotation axis of the positioner is mounted on its front side. An eccentric clamp is mounted on the slewing bearing for clamping an eccentric cylinder part and rotating with the slewing bearing about the rotation axis. At least one eccentric cylinder support is provided on the base, and the eccentric cylinder supports are arranged at intervals along the axial direction of the eccentric cylinder part for auxiliary support of the eccentric cylinder part. The base is provided with a horizontal guide mechanism for guiding the eccentric cylinder bracket to move in the horizontal direction. The eccentric cylinder bracket can be adjusted in the horizontal direction and locked in place by means of the horizontal guide mechanism. The eccentric cylinder support is provided with a height adjustment mechanism arranged in the vertical direction and a support part connected to the height adjustment mechanism. The support part is used to support the outer circle of the eccentric cylinder part at different height positions. The eccentric clamp is provided with an eccentric adjustment mechanism, which includes a lead screw rotatably arranged along a guide axis eccentrically arranged relative to the rotation axis, a nut assembly threadedly engaged with the lead screw and movable along the guide axis, and a clamping assembly connected to the nut assembly. The clamping assembly is used to clamp the eccentric cylinder part. By driving the lead screw to rotate, the nut assembly and the clamping assembly are moved along the guide axis, so that the eccentricity of the clamping axis of the clamping assembly relative to the rotation axis is continuously adjustable.

2. The eccentric adjustable welding positioner for eccentric cylinder parts according to claim 1, characterized in that: The horizontal guiding mechanism includes a linear guide rail disposed on the base and a slider mounted on the linear guide rail, and an eccentric cylinder bracket mounted on the slider; the base is provided with a limiting block at the end of the stroke of the linear guide rail to limit the movement stroke of the slider.

3. The eccentric adjustable welding positioner for eccentric cylinder parts according to claim 1, characterized in that: The height adjustment mechanism includes a vertical guide assembly and a lifting screw assembly mounted on an eccentric cylinder support. The vertical guide assembly includes at least one guide shaft and a linear bearing that cooperates with the guide shaft. The lifting screw assembly includes a lifting screw arranged in the vertical direction and a support handwheel connected to the lifting screw. The support part is fixed to the movable end of the lifting screw. By rotating the support handwheel, the lifting screw is driven to rotate, thereby driving the support part to move up and down in the vertical direction. The support part includes at least one pair of bullseye bearing seats mounted on a support plate on the support and bullseye bearings installed in the bullseye bearing seats, for supporting the eccentric cylinder part and allowing it to rotate.

4. An eccentric adjustable welding positioner for eccentric cylinder parts according to claim 2, characterized in that: The eccentric cylinder support is provided with a guide rail clamp that cooperates with the linear guide rail, which is used to lock and fix the position of the eccentric cylinder support on the linear guide rail after it is adjusted to a predetermined position.

5. An eccentric adjustable welding positioner for eccentric cylinder parts according to claim 1, characterized in that: The drive assembly includes a reducer and a servo motor. The reducer is mounted on a reducer mounting plate on the front side of the drive end housing. The servo motor is connected to the input end of the reducer, and a drive gear is mounted on the output end of the reducer. The slewing bearing is an external gear slewing bearing. The drive gear meshes with the external gear ring of the external gear slewing bearing. When the servo motor is working, it drives the external gear slewing bearing and the eccentric clamp to rotate via the reducer and the drive gear.

6. An eccentric adjustable welding positioner for eccentric cylinder parts according to claim 1, characterized in that: The lead screw is installed in an eccentric adjustment plate fixed on the inner ring of the slewing bearing. Both ends of the lead screw are supported by angular contact ball bearings on the eccentric adjustment plate and are axially positioned by locking nuts. A scale is provided on the side of the eccentric adjustment plate, and a pointer is provided on the component fixedly connected to the clamping assembly. When adjusting the eccentricity, the position of the pointer relative to the scale indicates the current eccentricity.

7. An eccentric adjustable welding positioner for eccentric cylinder parts according to claim 1, characterized in that: The base includes a base welding frame, adjusting bolts, and a ground mounting plate. The adjusting bolts are installed on both sides of the base welding frame and connected to the ground mounting plate. The levelness is adjusted by adjusting the adjusting bolts to drive the base welding frame to rise and fall as a whole. The ground mounting plate is fixedly connected to the ground by expansion screws.

8. An eccentric adjustable welding positioner for eccentric cylinder parts according to claim 1, characterized in that: A plurality of eccentric cylinder supports are provided on one side of the base along the extension direction of the horizontal guide mechanism. The plurality of eccentric cylinder supports are arranged at intervals along the direction of the horizontal guide mechanism to support eccentric cylinder parts of different lengths.

9. A method of using an eccentric adjustable welding positioner for eccentric cylindrical parts as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Record the dimensional parameters of the eccentric cylinder part according to the diameter, length and eccentricity requirements of the part to be processed; S2. Control the drive assembly to return the slewing bearing to the zero position, and place the operating part of the eccentric adjustment mechanism in a position that is easy to operate; S3. According to the eccentricity requirement of the eccentric cylinder part, drive the lead screw in the eccentricity adjustment mechanism to rotate, and drive the nut assembly and clamping assembly to move along the guide axis until the pointer indicates the position of the corresponding eccentricity, thereby completing the eccentricity adjustment. S4. The eccentric cylinder part is clamped in the clamping assembly and the eccentric cylinder part is reliably clamped; S5. Move each eccentric cylinder bracket along the horizontal guide mechanism, and when the eccentric cylinder bracket is in a predetermined position that can support the eccentric cylinder part, lock and fix the position of the eccentric cylinder bracket on the horizontal guide mechanism. S6. Drive the height adjustment mechanism to adjust the height of the support part of each eccentric cylinder bracket, so that the support part contacts the outer circle of the eccentric cylinder part, and provides auxiliary support for the eccentric cylinder part; S7. Control the drive assembly to drive the slewing bearing and the eccentric clamp to rotate around the slewing axis, so that the eccentric cylinder part is in the required posture position during the welding process, and the welding operation is completed.

10. The method of use according to claim 9, characterized in that, In step S3, the correspondence between the scale on the eccentric adjustment plate and the pointer on the clamping assembly is used to determine whether the eccentricity adjustment has reached the predetermined eccentricity of the eccentric cylinder part; in step S7, the welding position of the eccentric cylinder part is controlled by controlling the rotation angle of the servo motor to achieve continuous welding of the weld.

Images