A semi-automatic welding process device for small parts outside a thin-walled long cylinder

Abstract

The application discloses a kind of semi-automatic welding process devices of thin-walled long cylinder external small parts, including external small parts positioning clamping component, cylinder positioning clamping component and base component, the base component includes base, bearing seat, bearing and rotating shaft sleeve, bearing seat is fixed on base while pressing the outer ring of bearing, rotating shaft sleeve outer circle is assembled with bearing inner circle, the external small parts positioning clamping component is positioned in the thin-walled long cylinder to be welded, the cylinder positioning clamping component is positioned in the thin-walled long cylinder to be welded, and the external small parts positioning clamping component and the cylinder positioning clamping component are fixed on rotating shaft sleeve.The application can be used for the welding of external small parts of thin-walled long cylinder, and the device has high rigidity and strength in structure design, and uses the positioning and clamping of thin-walled long cylinder by expansion method, which can effectively solve the process problems of local deformation of cylinder after welding and misplacement of external small parts.

Description

Technical Field

[0001] The invention relates to a semi-automatic welding process device for small parts on the outside of a thin-walled long cylinder. Background Art

[0002] In the machining and manufacturing industry, welding small parts onto the exterior of thin-walled rotating workpieces is a common design practice for mounting critical components. To ensure component assembly accuracy on thin-walled rotating bodies, addressing the process technology for easily misaligned and deformed small parts welded onto thin-walled cylinders is a critical step in the equipment manufacturing process.

[0003] In actual production, welding small external parts on thin-walled, short cylinders (less than 500mm in length) presents relatively low process challenges. Standard processing equipment can be used to maintain relevant process parameters, ensuring that post-weld misalignment of small external parts and deformation of the cylinder are within controllable limits. However, welding small external parts on thin-walled, long cylinders presents difficulties in achieving these process parameters due to post-weld misalignment and deformation. The main reasons for this process problem are as follows: 1) When the positioning element for the thin-walled long cylinder in the process device has a clearance fit with the cylinder, a system positioning error occurs; 2) Due to the weight limit of the process device, the external small parts positioning element is not rigid enough, resulting in the inability to accurately position the external small parts; 3) When the external small parts clamping mechanism is designed as a manual clamping method, the cylinder is subjected to different clamping forces from each external small part in different orders, and the magnitude of the clamping force is uncontrollable, resulting in uneven circumferential force on the cylinder, causing the cylinder to deflect and the external parts to be misaligned; 4) Welding external small parts on a thin-walled cylinder is a local welding process, and the weld of the cylinder is deformed due to heat. In addition, due to the structural limitations of the thin-walled cylinder itself, the designed welding process device is relatively heavy. During manual clamping and welding, the workers have high labor intensity, which reduces the efficiency of the welding process. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a semi-automatic welding process device for small external parts of thin-walled long cylinders, which can not only ensure that the cylinder is evenly stressed after the external small parts are positioned and pressed, but also greatly reduce the labor intensity and complexity of workers' operations, and effectively improve the product welding efficiency.

[0005] The technical solution of the present invention to solve the above problems is: a semi-automatic welding process device for small parts on the outside of a thin-walled long cylinder, including an external small parts positioning and clamping component, a cylinder positioning and clamping component and a base component, the base component including a base, a bearing seat, a bearing and a rotating shaft sleeve, the bearing seat is fixed on the base and presses the outer ring of the bearing at the same time, the outer circle of the rotating shaft sleeve is interference fitted with the inner ring of the bearing, the outside of the thin-walled long cylinder to be welded is provided with an external small parts positioning and clamping component, the inside of the thin-walled long cylinder to be welded is provided with a cylinder positioning and clamping component, the external small parts positioning and clamping component and the cylinder positioning tensioning component are fixed on the rotating shaft sleeve.

[0006] The above-mentioned semi-automatic welding process device for the external small parts of the thin-walled long cylinder, the external small parts positioning and clamping components include a top plate, a bottom plate, a connecting rod, a biaxial clamping cylinder and an external small parts positioning block, the top plate and the bottom plate are connected and fixed by a number of connecting rods; a biaxial clamping cylinder is provided on the connecting rod, and an external small parts positioning block is fixed on the biaxial clamping cylinder, and a biaxial clamping cylinder manual control valve for controlling the biaxial clamping cylinder is provided on the bottom plate.

[0007] The above-mentioned semi-automatic welding process device for small external parts of thin-walled long cylinders, the external small parts positioning and clamping components also include a workpiece positioning block and a fixed block, the fixed block is placed on the workpiece positioning block and fixed to the top plate together with the first screw, and the pin is mounted on the workpiece positioning block.

[0008] The above-mentioned semi-automatic welding process device for small external parts of thin-walled long cylinders, the cylinder positioning and clamping components include a positioning sleeve, a support plate, and a tensioning cylinder, the support plate is fixedly installed in the middle of the base plate, and the lower end face of the thin-walled long cylinder to be welded is close to the upper surface of the support plate, the positioning sleeve is vertically fixed on the support plate, and a pull rod is vertically arranged in the middle of the positioning sleeve; the outer ring of the positioning sleeve is sequentially equipped with the second inner spacer sleeve, the first inner cone sleeve, the first inner spacer sleeve and the second inner cone sleeve from bottom to top, and is pressed and fixed with the inner cone sleeve pressure plate; the outer ring of the second inner cone sleeve is sequentially equipped with the second outer spacer sleeve, the first outer cone sleeve, the first outer spacer sleeve and the second outer cone sleeve from bottom to top, and is pressed and fixed with the outer cone sleeve pressure plate, and the first inner cone sleeve The outer conical surface cooperates with the inner conical surface of the first outer conical sleeve; the tensioning cylinder is fixed to the supporting plate through the tensioning cylinder fixing rod, and the tensioning cylinder adapter is tightened on the piston rod of the tensioning cylinder through threads, and one end of the stud thread is threadedly connected to the lower end of the pull rod, and the upper end of the pull rod passes through the inner conical sleeve pressure plate and is fixedly connected to the outer conical sleeve pressure plate, and the other end of the stud is connected to the tensioning cylinder adapter; the push rod fixing plate passes through the stud and is placed on the large end surface of the tensioning cylinder adapter, and a number of push rods are arranged on the push rod fixing plate, the lower end of the push rod is fixed on the push rod fixing plate, and the upper end of the push rod passes through the supporting plate and contacts with the lower end surface of the second outer spacer sleeve, and a tensioning cylinder manual control valve for controlling the tensioning cylinder is provided on the bottom plate.

[0009] In the above-mentioned semi-automatic welding process device for small external parts of thin-walled long cylinders, multiple biaxial pressing cylinders are divided into two groups and fixed on the connecting rods, and two biaxial pressing cylinders are set up one above and one below on each connecting rod.

[0010] In the above-mentioned semi-automatic welding process device for small parts outside the thin-walled long cylinder, the outer side surfaces of the second outer spacer, the first outer conical sleeve, the first outer spacer and the second outer conical sleeve are all in contact with the inner wall of the thin-walled long cylinder to be welded.

[0011] In the above-mentioned semi-automatic welding process device for small parts on the outside of thin-walled long cylinders, the base component also includes supporting legs, and a plurality of supporting legs are screwed onto the lower end surface of the base through threads.

[0012] The semi-automatic welding process device for small parts on the outside of the thin-walled long cylinder is provided with an air pressure regulating valve on the bottom plate.

[0013] The beneficial effects of the present invention are:

[0014] 1. The present invention can be used for welding external small parts of thin-walled long cylinders. The device structure is designed with high rigidity and uses a tensioning method to position and clamp the thin-walled long cylinder, which can effectively solve the process problems of local deformation of the cylinder after welding and excessive misalignment of external small parts.

[0015] 2. The structural design method of the workpiece positioning clamping component and the base that can rotate in the present invention avoids the operator from rotating the process device as a whole after welding an external part, saving time in moving the process device, improving product welding efficiency, and greatly reducing the operator's labor intensity.

[0016] 3. The present invention realizes the semi-automatic welding of small external parts of thin-walled long cylinders. After the operator puts the workpiece in, he can press the corresponding control valve to complete the positioning and clamping of the cylinder and external small parts. The operation is simple, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a perspective view of the present invention.

[0018] Figure 2 It is the front view of the present invention.

[0019] Figure 3 It is a top view of the present invention.

[0020] Figure 4 for Figure 2 A partial enlarged view of part I in the middle.

[0021] Figure 5 for Figure 2 A partial enlarged view of part II. Implementation Method

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] like Figure 1-Figure 5 The figure shows a semi-automatic welding process device for small external parts of thin-walled long cylinders, comprising a small external part positioning and clamping component, a cylinder positioning and clamping component, and a base component. The base component includes a base 14, a bearing seat 13, a bearing 36, a rotating sleeve 35, and support legs 16. The bearing seat 13 is fixed to the base 14 while pressing the outer ring of the bearing 36. The outer circle of the rotating sleeve 35 and the inner ring of the bearing 36 are interference fit. The four support legs 16 are screwed onto the lower end surface of the base 14. The small external part positioning and clamping component is provided on the outside of the thin-walled long cylinder 41 to be welded, and the cylinder positioning and clamping component is provided on the inside of the thin-walled long cylinder 41 to be welded. The small external part positioning and clamping component and the cylinder positioning and tightening component are fixed to the rotating sleeve 35 by a fifth screw 33. The base component is used to support the external small parts positioning and clamping components and the cylinder positioning and clamping components. By using bearings 36, the above two components can rotate freely. After the operator welds the upper and lower sets of external parts, he can rotate the above-mentioned supporting external small parts positioning and clamping components and the cylinder positioning and clamping components to proceed with the welding of the next set of external parts. In this way, the operator can complete the welding of all external small parts at one station, thereby reducing the operator's labor intensity.

[0024] The external small parts positioning and clamping components include a top plate 5, a bottom plate 12, a connecting rod 10, a biaxial clamping cylinder 9, an external small parts positioning block 8, a workpiece positioning block 3 and a fixed block 4. The top plate 5 and the bottom plate 12 are connected and fixed by 6 connecting rods 10. The 12 biaxial clamping cylinders 9 are divided into two groups and fixed on the connecting rods 10. Two biaxial clamping cylinders 9 are set up one above the other on each connecting rod 10. Each biaxial clamping cylinder 9 is fixed with an external small parts positioning block 8. The fixed block 4 is placed on the workpiece positioning block 3 and fixed to the top plate 5 together with the first screw 1. The pin 2 is fitted on the workpiece positioning block 3. The fixed block 4 is designed with a guide groove. The workpiece positioning block 3 can be extended and retracted left and right through the guide groove. The two pins 2 are used to limit the extension and retraction distance of the positioning block to prevent the workpiece positioning block 3 from escaping from the positioning groove of the fixed block 4. A positioning groove is milled on the right end of the workpiece positioning block 3. When the workpiece positioning block 3 extends to the right, it snaps into the positioning boss of the workpiece, thereby limiting the axial rotation of the cylinder. The bottom plate 12 is provided with a biaxial pressing cylinder manual control valve 19 for controlling the biaxial pressing cylinder 9. The external small parts positioning clamping component is used to press the external small parts against the outer circumference of the thin-walled long cylinder 41 to be welded by using the biaxial pressing cylinder 9.

[0025] The cylinder positioning and clamping components include a positioning sleeve 27, a supporting plate 31, and a tensioning cylinder 15. The supporting plate 31 is fixedly installed in the middle of the base plate 12, and the lower end face of the thin-walled long cylinder 41 to be welded is close to the upper surface of the supporting plate 31. The positioning sleeve 27 is vertically fixed to the supporting plate 31 by a fourth screw 30, and a pull rod 26 is vertically arranged in the middle of the positioning sleeve 27; the outer ring of the positioning sleeve 27 is sequentially equipped with the second inner spacer 29, the first inner cone sleeve 25, the first inner spacer 28 and the second inner cone sleeve from bottom to top, and is pressed and fixed by the inner cone sleeve pressing plate 24; the outer ring of the second inner cone sleeve is sequentially equipped with the second outer spacer 11, the first outer cone sleeve 7, the first outer spacer 6 and the second outer cone sleeve 22 from bottom to top, and is pressed and fixed by the outer cone sleeve pressing plate 21 through the third screw 23, and the outer cone surface of the first inner cone sleeve 25 cooperates with the inner cone surface of the first outer cone sleeve 7, the second outer spacer 11, the first outer cone sleeve 7, the first outer spacer 6 and The outer side surfaces of the second outer cone sleeve 22 are in contact with the inner wall of the thin-walled long cylinder 41 to be welded; the tensioning cylinder 15 is fixed to the support plate 31 through the tensioning cylinder fixing rod 39, the tensioning cylinder adapter 40 is screwed onto the piston rod of the tensioning cylinder 15 through a thread, one end of the stud 38 is threadedly connected to the lower end of the pull rod 26, the upper end of the pull rod 26 passes through the inner cone sleeve pressure plate 24 and is fixedly connected to the outer cone sleeve pressure plate 21 by a second screw 20, and the stud 38 is screwed onto the piston rod of the tensioning cylinder 15 through a thread. 8, the other end is connected to the tensioning cylinder adapter 40; the push rod fixing plate 37 is placed on the large end surface of the tensioning cylinder adapter 40 through the stud 38. Four push rods 32 are installed on the push rod fixing plate 37 via the sixth screw 34. The lower ends of the push rods 32 are fixed to the push rod fixing plate 37, and the upper ends of the push rods 32 pass through the support plate 31 to contact the lower end surface of the second outer spacer 11. The base plate 12 is equipped with a tensioning cylinder manual control valve 17 for controlling the tensioning cylinder 15. The base plate 12 is also equipped with an air pressure regulating valve 18 for adjusting the air pressure of the biaxial compression cylinder 9 and the tensioning cylinder 15, thereby adjusting the tensioning force of the thin-walled long cylindrical body 41 to be welded and the tightening force of the external small parts. The function of the cylinder positioning and clamping component is to expand the first outer cone sleeve 7 and the second outer cone sleeve 22 outward through the up and down movement of the piston rod of the tensioning cylinder 15, thereby tightening the thin-walled long cylinder 41 to be welded, and realizing the positioning and clamping of the thin-walled long cylinder 41 to be welded.

[0026] The working process of the present invention is:

[0027] 1. Introduce the air source into the air pressure regulating valve 18 interface on the process device, place the thin-walled long cylinder into the process device, and ensure that the lower end surface of the thin-walled long cylinder is in close contact with the surface of the support plate 31;

[0028] 2. Open the air pressure regulating valve 18, check the position of the pressure gauge pointer, confirm the introduction of compressed air, turn the knob on the air pressure regulating valve 18, and set the pressure to the given value;

[0029] 3. Trigger the manual control valve 17 of the tensioning cylinder on the left. The piston rod of the tensioning cylinder 15 moves downward. The downward force of the piston rod is transmitted to the second outer cone sleeve 22 through the stud 38, the pull rod 26 and the outer cone sleeve pressure plate 21. The second outer cone sleeve 22 slides downward on the cone surface under the downward force. Since the first inner cone sleeve 25 is fixed, the second outer cone sleeve 22 expands outward. Similarly, the first outer cone sleeve 7 expands outward under the downward force, thus achieving the tension and fixation of the thin-walled long cylinder 41.

[0030] 4. Install the external small parts of the thin-walled long cylinder on the corresponding external small parts positioning block 8. The magnet block attached to the external small parts positioning block 8 will attract the external small parts tightly. Make sure that each external small part is in close contact with the positioning surface of the external small parts positioning block 8.

[0031] 5. Press the right double-axis pressing cylinder manual control valve 19, and the piston rod of the double-axis pressing cylinder 9 is pushed out, pressing the external small parts onto the outer circle of the thin-walled long cylinder 41, so that the external small parts are positioned and tightened;

[0032] 6. Start spot welding the external parts. After welding the upper and lower groups of external small parts, rotate the process device to weld the remaining groups of external small parts of the thin-walled long cylinder in sequence;

[0033] 7. After spot welding is completed, the manual control valve 19 of the double-axis clamping cylinder is triggered, and the piston rod of the double-axis clamping cylinder 9 retracts with the external small parts positioning block 8, and then the manual control valve 17 of the tensioning cylinder is triggered, and the piston rod of the tensioning cylinder 15 moves upward. The upward force of the piston rod is transmitted to the push rod 32 through the push rod fixing plate 37. The four push rods 32 lift the second outer spacer 11, and the second outer spacer 11 pushes the first outer cone sleeve 7 to slide upward along the cone surface. The first outer cone sleeve 7 retracts. Similarly, the second outer cone sleeve 22 also retracts inward, and the tensioning force on the inner wall of the thin-walled long cylinder 41 is removed, so that the welded workpiece can be removed.

Claims

1. A semi-automatic welding process device for small external parts of a thin-walled long cylinder, comprising a small external part positioning and clamping component, a cylinder positioning and clamping component, and a base component, characterized in that: The base component includes a base, a bearing seat, a bearing and a rotating sleeve. The bearing seat is fixed on the base and presses the outer ring of the bearing. The outer circle of the rotating sleeve is interference fitted with the inner ring of the bearing. The outside of the thin-walled long cylinder to be welded is provided with an external small parts positioning clamping component. The inside of the thin-walled long cylinder to be welded is provided with a cylinder positioning tensioning component. The external small parts positioning clamping component and the cylinder positioning tensioning component are fixed on the rotating sleeve. The external small parts positioning and clamping component includes a top plate, a bottom plate, a connecting rod, a biaxial pressing cylinder and an external small parts positioning block. The top plate and the bottom plate are connected and fixed by a plurality of connecting rods; a biaxial pressing cylinder is provided on the connecting rod, and an external small parts positioning block is fixed on the biaxial pressing cylinder. A biaxial pressing cylinder manual control valve for controlling the biaxial pressing cylinder is provided on the bottom plate; The external small parts positioning and clamping component further includes a workpiece positioning block and a fixing block, the fixing block is placed on the workpiece positioning block and fixed to the top plate together with a first screw, and the pin is fitted on the workpiece positioning block; The cylinder positioning and clamping components include a positioning sleeve, a supporting plate, and a tensioning cylinder. The supporting plate is fixedly installed in the middle of the base plate, and the lower end face of the thin-walled long cylinder to be welded is close to the upper surface of the supporting plate. The positioning sleeve is vertically fixed on the supporting plate, and a pull rod is vertically arranged in the middle of the positioning sleeve; the outer ring of the positioning sleeve is sequentially equipped with the second inner spacer sleeve, the first inner cone sleeve, the first inner spacer sleeve, and the second inner cone sleeve from bottom to top, and is pressed and fixed with an inner cone sleeve pressure plate; the outer ring of the second inner cone sleeve is sequentially equipped with the second outer spacer sleeve, the first outer cone sleeve, the first outer spacer sleeve, and the second outer cone sleeve from bottom to top, and is pressed and fixed with an outer cone sleeve pressure plate, and the outer cone surface of the first inner cone sleeve is aligned with the inner cone surface of the first outer cone sleeve The conical surfaces match; the tensioning cylinder is fixed to the supporting plate by the tensioning cylinder fixing rod, the tensioning cylinder adapter is tightened on the piston rod of the tensioning cylinder by threads, one end of the double-headed stud thread is threadedly connected to the lower end of the pull rod, the upper end of the pull rod passes through the inner cone sleeve pressure plate and is fixedly connected to the outer cone sleeve pressure plate, and the other end of the double-headed stud is connected to the tensioning cylinder adapter; the push rod fixing plate passes through the double-headed stud and is placed on the large end surface of the tensioning cylinder adapter, a number of push rods are arranged on the push rod fixing plate, the lower end of the push rod is fixed on the push rod fixing plate, the upper end of the push rod passes through the supporting plate and contacts with the lower end surface of the second outer spacer sleeve, and a tensioning cylinder manual control valve for controlling the tensioning cylinder is provided on the bottom plate.

2. The semi-automatic welding process device for small external parts of thin-walled long cylinders according to claim 1 is characterized in that: A plurality of double-axis pressing cylinders are divided into two groups and fixed on the connecting rods, and two double-axis pressing cylinders are arranged one above and one below on each connecting rod.

3. The semi-automatic welding process device for small external parts of thin-walled long cylinders according to claim 1 is characterized in that: The outer side surfaces of the second outer spacer, the first outer conical sleeve, the first outer spacer and the second outer conical sleeve are all in contact with the inner wall of the thin-walled long cylinder to be welded.

4. The semi-automatic welding process device for small external parts of thin-walled long cylinders according to claim 1 is characterized in that: The base component also includes supporting feet, and a plurality of supporting feet are screwed onto the lower end surface of the base through threads.

5. The semi-automatic welding process device for small external parts of thin-walled long cylinders according to claim 1 is characterized in that: An air pressure regulating valve is provided on the bottom plate.

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