A quick positioning and welding device for blind hole part lifting lug
By designing a rapid positioning and welding device for the front and rear lifting lug seats and threaded connections, the problems of inaccurate positioning and deformation in the welding of lifting lugs of blind hole parts were solved, achieving efficient and accurate welding results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN ZHONGYUAN SPECIAL STEEL EQUIP MFG CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-02
AI Technical Summary
In the existing technology, when welding the lifting lugs of blind hole parts, there are problems of inaccurate positioning and deformation, resulting in low welding efficiency and difficulty in meeting the requirements of geometric tolerances and positional tolerances.
A rapid positioning welding device including a front lifting lug and a rear lifting lug is designed. The lifting lug is fastened to the blind hole part through threaded connection and fastening screw, ensuring that the lifting lug fits the inner arc surface of the blind hole part. Welding is carried out after the gap is checked to be less than 0.2mm using a feeler gauge.
This technology enables rapid and accurate positioning and welding of lifting lugs for blind hole parts, improving welding efficiency, ensuring the accuracy of geometric tolerances and positional tolerances, and avoiding deviations caused by improper assembly or welding deformation.
Smart Images
Figure CN224309952U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of machining technology, and in particular relates to a rapid positioning welding device for lifting lugs of blind hole parts that is suitable for improving welding efficiency and positioning accuracy. Background Technology
[0002] Currently, when welding lifting lugs to blind hole parts, the two lifting lug holes on the blind hole part have already been machined. The symmetry of the two lifting lug holes relative to the center of the hole in the blind hole part is within 0.3mm, and the positional accuracy is within 0.4mm. The two lifting lug seats are welded after passing through the lifting lug holes in the blind hole. In order to ensure the quick positioning of the lifting lug seats and the blind hole part during assembly, the upper surface of the lifting lug seats is in contact with the arc surface of the inner hole of the blind hole. After welding, the form and position tolerances and positional tolerances of the two lifting lug seats meet the requirements, improve the welding efficiency, and avoid deviations caused by deformation and inaccurate positioning during welding. Therefore, a fixed welding device is needed to solve the above problems. Utility Model Content
[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology by providing a quick positioning and welding device for the lifting lugs of blind hole parts, which ensures the form and position tolerances and positioning dimensions after welding the front and rear lifting lugs, has high positioning accuracy, is convenient and quick, simple to manufacture, and easy to use.
[0004] The technical solution of this utility model is implemented as follows:
[0005] A quick positioning and welding device for lifting lugs of blind hole parts includes a front lifting lug seat and a rear lifting lug seat installed in the front and rear lifting lug holes of the blind hole part. The front lifting lug seat and the rear lifting lug seat are respectively connected to the front lifting lug seat tie rod and the rear lifting lug seat tie rod by threads. Holes are opened on the front lifting lug seat tie rod and the rear lifting lug seat support rod through the holes. Threaded holes are opened at both ends of the front lifting lug seat support rod and the rear lifting lug seat support rod. Two front lifting lug seat fastening screws are threaded into the threaded holes at both ends of the front lifting lug seat support rod, and two rear lifting lug seat fastening screws are also threaded into the threaded holes at both ends of the rear lifting lug seat support rod. The two front lifting lug seat fastening screws and the two rear lifting lug seat fastening screws are pressed against the surface of the blind hole part.
[0006] The arc R of the front and rear lifting lugs fits into the arc of the inner hole of the blind hole part.
[0007] The threads on the heads of the front and rear lifting lugs are consistent with the threads in the inner holes of the front and rear lifting lugs, ensuring that the front and rear lifting lugs can be tightened.
[0008] The positive effects of this utility model's technical solution are as follows: This blind hole front and rear lifting lug welding device enables convenient and rapid welding of front and rear lifting lugs onto blind hole parts. This device is rationally designed, simple to manufacture, low in cost, and easy to use. Furthermore, the size of the front and rear lifting lugs can be universally applicable within a certain range, depending on the size of the lifting lug hole in the blind hole part. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of a blind hole component.
[0010] Figure 2 This is a front view of the front lifting lug seat of a quick positioning and welding device for blind hole parts according to this utility model.
[0011] Figure 3 This is a front view of the rear lifting lug seat of a quick positioning and welding device for lifting lugs of blind hole parts according to this utility model.
[0012] Figure 4 This is a front view of a quick positioning and welding device for lifting lugs of blind hole parts according to the present invention. Detailed Implementation
[0013] like Figure 4 As shown, a quick positioning and welding device for lifting lugs of blind hole parts includes a front lifting lug seat 2 and a rear lifting lug seat 5 installed in the front and rear lifting lug holes of the blind hole part 1. The front lifting lug seat 2 and the rear lifting lug seat 5 are respectively connected to the front lifting lug seat tie rod 6 and the rear lifting lug seat tie rod 7 by threads. Holes are opened on the front lifting lug seat tie rod 6 and the rear lifting lug seat tie rod 7, and front lifting lug seat support rod 8 and rear lifting lug seat support rod 9 pass through the holes. Threaded holes are opened at both ends of the front lifting lug seat support rod 8 and the rear lifting lug seat support rod 9. Two front lifting lug seat fastening screws 3 are threadedly connected to the threaded holes at both ends of the front lifting lug seat support rod 8, and two rear lifting lug seat fastening screws 4 are threadedly connected to the threaded holes at both ends of the rear lifting lug seat support rod 9. The two front lifting lug seat fastening screws 3 and the two rear lifting lug seat fastening screws 4 press against the surface of the blind hole part 1.
[0014] The arc R of the front lug 2 and the rear lug 5 fits into the arc of the inner hole of the blind hole part.
[0015] The threads at the heads of the front lug tie rod 6 and the rear lug tie rod 7 are consistent with the threads in the inner holes of the front lug 2 and the rear lug 5, ensuring that the front lug 2 and the rear lug 5 can be tightened.
[0016] Example: A quick positioning and welding device for lifting lugs of blind hole parts includes a blind hole part 1, a front lifting lug seat 2, a rear lifting lug seat 5, two front lifting lug seat fastening screws 3, two rear lifting lug seat fastening screws 4, a front lifting lug seat pull rod 6, a rear lifting lug seat pull rod 7, a front lifting lug support rod 8, and a rear lifting lug seat support rod 9. The arc R of the front lifting lug seat 2 and the rear lifting lug seat 5 fits the arc of the inner hole of the blind hole part. The front lifting lug seat pull rod 6... The front and rear hanging lugs are connected to the threaded holes of the front and rear hanging lugs 2 and 5 respectively through the threads on their heads; the front and rear hanging lugs are connected to the front and rear hanging lugs support rods 8 and 9 respectively through the through holes on them; the front and rear hanging lugs support rods 8 and 9 are provided with threaded holes at both ends, and two front and rear hanging lugs fastening screws and two rear hanging lugs fastening screws are installed in the threaded holes respectively.
[0017] like Figure 1 , 2 As shown in Figures 3 and 4, a quick positioning and welding device for lifting lugs of blind hole parts is provided. A tool is used to pass the front lifting lug seat 2 and the rear lifting lug seat 5 through the threaded holes of the lifting lug holes in the blind hole part. The front lifting lug seat fastening screw 8 and the rear lifting lug seat fastening screw 9 are respectively installed in the threaded holes at both ends of the front lifting lug seat support rod 8 and the rear lifting lug seat support rod 9. The front lifting lug seat fastening screw 8 and the rear lifting lug seat fastening screw 9 press against the surface of the blind hole part 1, causing the front lifting lug seat pull rod 6 and the rear lifting lug seat pull rod 7 to tighten the front lifting lug seat 2 and the rear lifting lug seat 5, so that the arc R of the front lifting lug seat 2 and the rear lifting lug seat 5 aligns with the arc R of the inner hole of the blind hole part. The parts are tightly fitted together. The gap between the front and rear lifting lugs 2 and the arc surface of the blind hole part 1 is measured with a feeler gauge and is less than 0.2mm. Under the tight condition, four circumferential spot welds are performed, followed by welding. This ensures the positional dimensions and geometric tolerances of the front and rear lifting lugs 2 and 5, and achieves rapid positioning for the assembly and welding of the lifting lugs 2 and 5 with the blind hole part 1. This avoids deviations in geometric tolerances and positional tolerances caused by improper assembly or welding deformation.
[0018] Two front and rear lifting lugs extend from the inner hole of the blind hole part. Two threaded tie rods are used to tighten the lifting lugs, ensuring that the arc surface of the lifting lug seat fits tightly against the inner arc surface of the blind hole part. Two threaded holes are opened at both ends of the support rod, which is connected to the fastening screw through the two threaded holes. By adjusting the fastening screw and ensuring relative movement between the threads of the fastening screw and the support rod, the head of the fastening screw is pressed against the blind hole part, which in turn drives the support rod to pull the tie rod. The tie rod tightens the front and rear lifting lug seats and the mating surfaces of the blind hole part through the threads, ensuring they are properly fitted. A feeler gauge is used to check the gap between the inner arc surface of the front and rear lifting lug seats and the inner arc surface of the blind hole part. If the gap is less than 0.2mm, and the inspection is passed, the lifting lug seats are welded under the tightened state.
Claims
1. A quick positioning and welding device for lifting lugs of blind hole parts, comprising a front lifting lug seat (2) and a rear lifting lug seat (5) installed in the front and rear lifting lug holes of the blind hole part (1), characterized in that: The front hanger (2) and the rear hanger (5) are connected to the front hanger tie rod (6) and the rear hanger tie rod (7) respectively by threads; holes are opened on the front hanger tie rod (6) and the rear hanger tie rod (7), and the front hanger support rod (8) and the rear hanger support rod (9) pass through the holes; threaded holes are opened at both ends of the front hanger support rod (8) and the rear hanger support rod (9), and two front hanger fastening screws (3) are threaded in the threaded holes at both ends of the front hanger support rod (8), and two rear hanger fastening screws (4) are threaded in the threaded holes at both ends of the rear hanger support rod (9). The two front hanger fastening screws (3) and the two rear hanger fastening screws (4) press against the surface of the blind hole part (1).
2. The quick positioning and welding device for lifting lugs of blind hole parts according to claim 1, characterized in that: The arc R of the front lug (2) and the rear lug (5) fits into the arc of the inner hole of the blind hole part.
3. The quick positioning and welding device for lifting lugs of blind hole parts according to claim 1, characterized in that: The threads at the heads of the front and rear lugs are consistent with the threads in the inner holes of the front and rear lugs (2 and 5), ensuring that the front and rear lugs (2 and 5) can be tightened.