A processing equipment and process for a column for a frame type hydraulic press

Abstract

The present invention relates to the technical field of frame hydraulic presses, and discloses a processing device and process for a column for a frame hydraulic press, the device includes a welding center, the welding center is composed of a positioning mechanism, a welding mechanism, a reversing assembly, a driving assembly, a preheating assembly, a grinding mechanism and a plurality of auxiliary supporting mechanisms, the welding center is also provided with an outer tube and an inner tube, the positioning mechanism is installed in the inner tube, the driving assembly is integrated and assembled on the positioning mechanism, so as to realize directional conveying of steel components during welding, and at the same time realize pressing of steel components to reduce welding stress, and the reversing assembly is installed in the outer tube to support and drive the inner tube to rotate axially. The technical solution can play a supporting role from the inside of the square tube during welding through an assembled inner skeleton, and the two are formed into a whole after welding, which effectively increases the structural stability of the column when in use, and can also press the steel components from the corners of the column to reduce welding stress.

Description

Technical Field

[0001] The invention relates to the technical field of frame type hydraulic presses, in particular to processing equipment and a process for a column for a frame type hydraulic press. Background Art

[0002] Most frame-type hydraulic presses are prestressed split-frame type, and there are many studies and analyses on this type of hydraulic presses. The internal high-pressure forming hydraulic press studied in this project is based on the previous experience in the development of high-precision and high-load forming hydraulic presses, numerical simulation analysis results, forming process research and maximum load loading characteristics, and finally a stable and reasonable mainframe structure design is obtained. The fuselage adopts a split frame structure, which consists of an upper crossbeam, a lower crossbeam, a column, a nut, a tie rod, etc. The fuselage is connected by four tie rods to form a closed frame structure with sufficient strength and rigidity. The upper and lower beams and the columns are directly connected on the surface with positioning keys. In order to prevent the upper and lower beams and the column parts from being misaligned during re-installation and operation, the joint surfaces are all positioned with positioning rings. The four tie rods are tightened by hydraulic pre-tightening to ensure the rigidity of the whole machine. For the frame type hydraulic press, the column is not only a supporting part but also a guiding part for maintaining the guide. In order to ensure that the guiding accuracy of the slider is not affected, the column design must ensure sufficient rigidity and strength. At the same time, four right-angle guide rails are arranged on the outside of the column. The surface of the guide rail is equipped with a guide plate made of 42CrMo material. After nitriding treatment, the guide plate can achieve higher strength and wear resistance, effectively improving the long-term stability of operation. Although the size of the traditional column is matched with the tonnage of the hydraulic press, the column is also made of steel plates cut and then spliced ​​and welded, which makes the size of the column not limited by the material, the operating range is large, and the design difficulty is reduced.

[0003] At present, however, the columns need to be welded multiple times after splicing. Welding stress is very likely to occur during the welding process, causing deformation of the columns after welding. Moreover, the stress between the internal welding point and the rest of the column after welding is uneven, causing subsequent deformation of the columns when they are subjected to loads. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a processing device and process for a column for a frame-type hydraulic press, which solves the problem that welding stress is very likely to occur in the column during multiple welding processes, resulting in deformation of the column after welding, and the stress at the internal welding point and the rest of the column after welding is uneven, resulting in deformation of the column when it is subsequently subjected to load.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a processing device for a column for a frame-type hydraulic press, comprising a welding center, wherein the welding center is composed of a positioning mechanism, a welding mechanism, a reversing assembly, a driving assembly, a preheating assembly, a grinding mechanism and a plurality of auxiliary support mechanisms;

[0008] The welding center is also provided with an outer round tube and an inner round tube, the positioning mechanism is installed in the inner round tube, and the driving assembly is integrated and assembled on the positioning mechanism, so as to realize directional conveying of steel components during welding and simultaneously realize pressing of steel components to reduce welding stress;

[0009] The reversing assembly is installed in the outer tube to support and drive the inner tube to rotate axially to achieve switching of the welding surface of the steel component surface;

[0010] The grinding mechanism is integrated and assembled on the welding mechanism to grind and shape the welding point after welding is completed;

[0011] The steel component is composed of a square tube formed by bending a steel plate blank and an inner frame, the inner frame is composed of a cross, a side plate and a side plate, and the square tube, the inner frame and the assembled columns are all welded, polished and annealed in a welding center.

[0012] Preferably, the positioning mechanism includes a positioning ring, the positioning ring is fixed to the inner edge of the opening of the inner tube, the inner edge of the opening of the inner tube is sleeved with an inner gear ring, a limiting ring is provided on one side of the inner gear ring, the limiting ring is fixed at the opening edge of the inner tube, the side wall of the positioning ring is rotatably connected to a plurality of bidirectional screw rods through rolling bearings, one end of the plurality of bidirectional screw rods is rotatably connected to the inner side of the inner tube through a bearing seat, the other end of the bidirectional screw rod is fixedly connected to a driving gear, the driving gear is meshed with the inner gear ring, and two threaded sleeves are sleeved on the rod wall of the bidirectional screw rod. The side walls of the two threaded sleeves are fixedly connected to two pins, and two rings are slidably sleeved in the inner tube. The inner sides of the two rings are fixedly connected to a plurality of lifting ears, wherein the two lifting ears are respectively sleeved on the side walls of the two shaft pins, and the threaded sleeve is rotatably connected to a plurality of push rods through the pins, and the side walls of the inner tube are fixedly connected to two rectangular sleeves, and the two rectangular sleeves are jointly sleeved with a T-shaped frame, and the side walls of the T-shaped frame are rotatably connected to one end of the plurality of push rods through pins, and a positioning roller is rotatably connected in the T-shaped frame through a support shaft, and a positioning groove is provided on the side walls of the positioning roller;

[0013] A first motor is fixedly connected to the edge of the inner tube via a support, an output end of the first motor is fixedly connected to one end of one of the bidirectional screw rods, and the drive assembly is fixed on a T-shaped frame.

[0014] Preferably, the driving assembly includes two brackets, and the side walls of the two brackets are rotatably connected to two connecting shafts through rolling bearings. A synchronous belt is provided at the lower end of the bracket, and two synchronous wheels are wound around the synchronous belt. The two synchronous wheels are respectively fixed on the shaft walls of the two connecting shafts, and the connecting shaft is fixedly connected to the upper end of the support shaft. One side of the bracket is fixed to one side of the T-shaped frame through a connecting block, and the other side of the bracket is fixedly connected to a reduction motor, and the output end of the reduction motor is fixedly connected to one end of one of the connecting shafts.

[0015] Preferably, the welding mechanism includes a welding gun head, a first guide rail and a second guide rail, the first guide rail is fixed to the side wall of the outer ring, a first slide seat is sleeved on one side of the first guide rail, a second slide seat is fixedly connected to one side of the first slide seat, the second guide rail is slidably connected in the second slide seat, a second motor is fixedly connected to one side of the first slide seat, an output end of the second motor extends into the first slide seat and is fixedly connected to a gear shaft, a rack is meshed on one side of the gear shaft, the rack is embedded and fixed in the first guide rail, and one side of the second guide rail is rotated through a bearing seat A screw is connected, a threaded tube is threadedly connected to the rod wall of the screw, a worm wheel is fixedly connected to the side wall of the threaded tube, a worm is meshed with one side of the worm wheel, a third motor is fixedly connected to one side of the first slide seat, an output end of the third motor is fixedly connected to one end of the worm, two sleeves are fixedly connected to the side wall of the second slide seat, both of the sleeves are sleeved on the rod wall of the screw, the lower end of the threaded tube is fixedly connected to the upper end of one of the sleeves, the welding gun head is fixed on one side of the second guide rail, and the grinding mechanism is installed on the other side of the second guide rail.

[0016] Preferably, the grinding mechanism includes a support plate, and the side wall of the support plate is sleeved with a plurality of guide columns through guide holes, the upper and lower ends of the plurality of guide columns are respectively fixedly connected with a mounting plate and a fixing plate, the side wall of the fixing plate is fixedly connected with a spindle motor, the output end of the spindle motor is fixedly connected with a grinding head, the side wall of the mounting plate is sleeved with the side wall of the spindle motor through a circular hole, the side wall of the support plate is fixedly connected with an electric push rod, the output end of the electric push rod passes through the side wall of the mounting plate and is fixedly connected to the upper end of the fixing plate, and the side wall of the mounting plate is provided with two assembly holes matching the electric push rod and the side wall of the spindle motor.

[0017] Preferably, the reversing assembly includes two outer gear rings, and the side walls of the two outer gear rings are each provided with two limiting portions, the outer gear rings are fixed to the side walls of the inner tube and meshed with multiple gears, the side walls of the gears are rotatably connected to a support seat via a rotating shaft, the support seat is fixed to the inner side of the outer tube, a mounting seat is fixedly connected to the edge of the outer tube, a fourth motor is fixedly connected to the side wall of the mounting seat, the output end of the fourth motor passes through the side wall of the mounting seat and is fixedly connected to one end of the rotating shaft, and the side wall of the outer tube is fixedly connected to a base.

[0018] Preferably, the preheating assembly comprises an electromagnetic induction coil, the outer side of the electromagnetic induction coil is fixedly connected to a heat shield, the side wall of the heat shield is fixedly connected to a plurality of connecting pieces, the plurality of connecting pieces are fixed to the edge of the inner circular tube, and the electromagnetic induction coil is a polygonal structure.

[0019] The present invention also provides a processing technology for a column for a frame type hydraulic press, using the above processing equipment, comprising the following steps:

[0020] Step 1: CNC cutting of steel plates. Use a laser cutting machine to cut out the steel components of the columns. The steel components include steel plate blanks, side plates and edge plates. Cut through holes on the steel plate blanks, open rectangular holes on the edge plates, mill welding grooves on the side plates, and open grooves with an angle of 45° at both ends of the side plates.

[0021] Step 2: Hardening of steel components: Use a shot peening machine to perform the first shot peening hardening on the cut steel plate blanks, side plates and edge plates;

[0022] Step 3: Bending the steel components: Use a bending machine to bend the steel plate blank three times to form a rectangular structure. The right-angle gap formed after bending is the welding point. Use a bending machine to bend multiple side plates. The width of the folded edge after bending is 5-8cm, and the bending angle is 45°.

[0023] Step 4: Assemble the inner frame. The inner frame is composed of multiple crosses riveted in multiple side panels. The spacing between the crosses is the same as the rectangular holes on the side panels. First, use bolts to pass through the rectangular holes to fix the ends of the crosses. Manually arrange the side panels between adjacent side panels, and keep the spacing consistent with the spacing of the crosses. Use a welding machine to spot weld and fix them.

[0024] Step 5, assembly welding, hoist the assembled inner frame in the welding center, weld the rectangular hole on the side plate, at this time, the rectangular hole forms a molten pool and is firmly welded to the end of the cross, weld the groove connected to the side plate at the folded edge, at this time, the groove and the folded edge form a welding molten pool, insert the welded inner frame into the square tube, ensure that the folded edge of the side plate is in contact with the inner side of the square tube, and then hoist the assembled square tube and the inner frame together in the welding center, with the right-angle gap on the square tube facing upward, and then use the positioning mechanism to position the square tube, then you can weld the weld of the square tube first, after the weld is completed, weld the molten pool composed of the through hole and the welding groove on the surface of the square tube, so that the side plate is connected to the tube wall of the square tube, and use the preheating component to preheat the surface of the steel member before welding during assembly welding, wherein the preheating component is installed on one side of the welding gun head to achieve direct welding after preheating, and the preheating speed is synchronized with the welding speed;

[0025] Step 6: Secondary shot peening hardening of the square tube surface. After preliminary grinding, the weld points on the square tube surface are annealed. During annealing, the power of the preheating component is adjusted to raise the temperature of the column surface to the annealing temperature. After annealing, the square tube surface is cooled to room temperature and a shot peening machine is used to perform secondary shot peening on the square tube surface.

[0026] Step 7: Machining the surface of the square tube, drilling holes at fixed positions and processing threads in the holes according to technical requirements, and then checking the error of the column, generating a report for the inspection results and making a proof. Each column needs to have an inspection report and be signed and confirmed by the quality inspector;

[0027] Step 8. After the inspection project is completed, spray epoxy primer and topcoat for anti-corrosion treatment. After the paint surface is dry, the column for the frame hydraulic press is obtained.

[0028] Preferably, the shot peening intensity during the first shot peening is 0.40-0.50 mmA, and the coverage is 200%, and the steel shot uses a shot with a hardness of 55-62 HRC. The shot peening intensity during the secondary shot peening is 0.20-0.30 mmA, and the coverage is 150%, and the steel shot also uses a shot with a hardness of 55-62 HRC.

[0029] Preferably, the steel plate blank is a rectangular structure, the length of the steel plate blank is the height of the column, the width is the circumference of the column, the multiple through holes of the long strip structure cut out on the steel plate blank are distributed in a rectangular array, the length of the multiple side panels cut out by the laser cutting machine is the same as the length of the column, and the cross-section of the welding groove milled out on the surface of the side panel is V-shaped.

[0030] (III) Beneficial effects

[0031] Compared with the prior art, the present invention provides a processing device and process for a column for a frame type hydraulic press, which has the following beneficial effects:

[0032] 1. When processing the column, the present invention adopts a whole piece of cut steel plate to be bent and then welded to assemble the column. The welding workload after bending is less, and the corners formed by direct cold bending are more stable. At the same time, the preheating method is used to preheat the welding point during the welding process, which can increase the temperature of the steel component and make the welding firm. The assembled inner skeleton can play a supporting role from the inside of the square tube during welding, and the inner skeleton is directly welded to the through hole on the side of the square tube to form a whole, which effectively increases the structural stability of the column when in use, and makes it less likely to produce elastic deformation when under pressure. During the welding process, the driving component is integrated and assembled on the positioning mechanism to realize directional conveying of the steel component during welding, and at the same time, the steel component is pressed from the corners of the column to reduce the welding stress. In addition, the column All steel components used in the column are shot peened with a shot peening machine. During shot peening, a high-speed projectile stream is sprayed onto the surface of the part, causing plastic deformation of the surface of the part to form a strengthening layer of a certain thickness. A higher residual stress is formed in the strengthening layer. When the part is under load, the residual stress involved can offset part of the stress, thereby improving the fatigue strength of the part. In addition, a secondary shot peening treatment is performed again after welding is completed to re-form a strengthening layer at the welding point, so that the hardness of the strengthening layer on the surface of the column is uniform. After the secondary shot peening treatment, annealing treatment can be used. During annealing, the power of the preheating component is adjusted to raise the temperature of the column surface to the annealing temperature. In this way, the primer can be sprayed after cooling, and the surface glossiness of the workpiece is reduced after shot peening, which can greatly increase the adhesion between the primer and the workpiece.

[0033] 2. The present invention is provided with a positioning mechanism and a driving assembly. When welding the inner frame and the square tube, the positioning roller is moved and the positioning groove is used to clamp the right angle of the square tube. At this time, the positioning groove is in contact with the two sides of the right angle of the square tube respectively, so that the positioning and pressing function can be achieved. When in contact with the side plate of the inner frame, the positioning roller can be used to press the side plate in multiple directions. In this way, the welding stress can be suppressed during welding and deformation can be avoided during welding. During the welding process, the reduction motor is started to drive the connecting shaft to rotate the support shaft. At the same time, the positioning rollers on the two support shafts can be driven to rotate through the synchronous wheel and the synchronous belt. The rotation of the positioning roller can transport the square tube or the inner frame, so that the welding operation can be carried out in cooperation with the welding gun head.

[0034] 3. The welding mechanism and grinding mechanism provided in the present invention can adjust the welding angle and position of the welding gun head by lateral and vertical movement when in use. After welding is completed, the electric push rod is started to drive the fixed plate to move the spindle motor downward. When the spindle motor moves downward, the grinding head contacts the welding point on the workpiece, so that grinding operation can be achieved after welding. The same motion mechanism as the welding gun head is used for grinding, and the positioning mechanism and the conveying mechanism can also be used for conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural schematic diagram of a machining center and a column in a processing device for a column for a frame-type hydraulic press proposed by the present invention;

[0036] Figure 2 This is a structural schematic diagram of a machining center and an inner frame in a machining device for a column of a frame-type hydraulic press proposed by the present invention;

[0037] Figure 3 A schematic diagram of the structure of a processing center in a processing device for a frame type hydraulic press column proposed by the present invention Figure 1 ;

[0038] Figure 4 A schematic diagram of the structure of a processing center in a processing device for a frame type hydraulic press column proposed by the present invention Figure 2 ;

[0039] Figure 5 This is a schematic structural diagram of an inner round tube, a positioning mechanism and a driving assembly in a processing device for a column for a frame type hydraulic press proposed by the present invention;

[0040] Figure 6 A processing device for a column of a frame type hydraulic press proposed by the present invention Figure 5 Schematic diagram of the structure of the middle limit ring, internal gear ring, circular ring, bidirectional lead screw and driving gear;

[0041] Figure 7 This is a schematic diagram of the structure of an outer round tube, an outer gear ring, a gear, an inner round tube, a bidirectional screw rod and a driving gear in a processing device for a column for a frame type hydraulic press proposed by the present invention;

[0042] Figure 8 This is a structural schematic diagram of a positioning mechanism and a driving assembly in a processing device for a column for a frame-type hydraulic press proposed by the present invention;

[0043] Fig. 9 This is a structural schematic diagram of a welding mechanism in a processing device for a column for a frame type hydraulic press proposed by the present invention;

[0044] Fig.10 A schematic diagram of the structure of a first guide rail, a first slide seat, a rack, a second motor and a gear shaft in a processing device for a frame type hydraulic press column proposed by the present invention;

[0045] Fig.11 A schematic structural diagram of a square tube and an inner frame in a processing device for a column for a frame-type hydraulic press proposed by the present invention;

[0046] Fig.12 This is a rendering of the column and inner frame in a machining center of a processing device for a column for a frame-type hydraulic press proposed by the present invention.

[0047] In the figure: 1, outer tube; 2, square tube; 3, auxiliary support mechanism; 4, second guide rail; 5, first guide rail; 6, gear; 7, inner tube; 8, outer gear ring; 9, ring; 10, inner frame; 11, preheating assembly; 12, first slide; 13, positioning roller; 14, bracket; 15, T-shaped frame; 16, connecting piece; 17, welding gun head; 18, electric push rod; 19, spindle motor; 20, rectangular sleeve; 21, reduction motor; 22, driving gear; 23, second electric machine; 24, the third motor; 25, the limit ring; 26, the first motor; 27, the fourth motor; 28, the push rod; 29, the threaded sleeve; 30, the bidirectional screw; 31, the internal gear ring; 32, the positioning ring; 33, the synchronous belt; 34, the synchronous wheel; 35, the second slide; 36, the mounting plate; 37, the support plate; 38, the fixing plate; 39, the guide column; 40, the rack; 41, the worm; 42, the bushing; 43, the worm wheel; 44, the threaded tube; 45, the screw; 46, the gear shaft. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Example 1: Refer to the attached Figure 1-12 A processing equipment for a column of a frame type hydraulic press, including a welding center, the welding center is composed of a positioning mechanism, a welding mechanism, a reversing component, a driving component, a preheating component 11, a grinding mechanism and a plurality of auxiliary support mechanisms 3. The welding center is also provided with an outer round tube 1 and an inner round tube 7. The positioning mechanism is installed in the inner round tube 7. The driving component is integrated and assembled on the positioning mechanism to realize directional conveying of steel components during welding and to realize pressing of steel components to reduce welding stress.

[0050] The reversing assembly is installed in the outer tube 1 to support and drive the inner tube 7 to rotate axially to achieve switching of the welding surface of the steel component surface; the reversing assembly includes two outer gear rings 8, and the side walls of the two outer gear rings 8 are provided with two limit parts. The outer gear rings 8 are fixed to the side walls of the inner tube 7 and meshed with multiple gears 6. The side walls of the gears 6 are rotatably connected to a support seat through a rotating shaft. The support seat is fixed to the inner side of the outer tube 1, and a mounting seat is fixedly connected to the edge of the outer tube 1. The side wall of the mounting seat is fixedly connected to a fourth motor 27. The output end of the fourth motor 27 passes through the side wall of the mounting seat and is fixedly connected to one end of the rotating shaft. The side wall of the outer tube 1 The wall is fixedly connected with a base, and a grinding mechanism is integrated and assembled on the welding mechanism to grind and shape the welding point after welding. The steel component is composed of a square tube 2 formed by bending a steel plate blank and an inner skeleton 10. The inner skeleton 10 is composed of a cross, a side plate and a side plate. The square tube 2, the inner skeleton 10 and the assembled columns are welded, ground and annealed in the welding center. The preheating component 11 includes an electromagnetic induction coil, and the outer side of the electromagnetic induction coil is fixedly connected with a heat insulation cover, and the side wall of the heat insulation cover is fixedly connected with multiple connecting plates 16, and the multiple connecting plates 16 are fixed at the edge of the inner circular tube 7. The electromagnetic induction coil is a polygonal mechanism.

[0051] When processing the column, the present invention adopts a whole piece of cut steel plate to be bent and then welded to assemble the column. The welding workload after bending is less, and the corners formed by direct cold bending are more stable. At the same time, the preheating method is used to preheat the welding position during the welding process, which can increase the temperature of the steel component and make the welding firm. The assembled inner frame 10 can play a supporting role from the inside of the square tube 2 during welding, and the inner frame 10 is directly welded to the through hole on the side of the square tube 2 to form a whole, which effectively increases the structural stability of the column when in use, and makes it less likely to produce elastic deformation when under pressure. In the welding process, the driving component assembly The assembly is assembled on the positioning mechanism to realize directional conveying of steel components during welding, and at the same time, it can press the steel components from the corners of the columns to reduce welding stress, so that the column structure after welding meets the technical requirements and reduces the subsequent shaping process after welding. The reversing component set in the welding center is installed in the outer tube 1 to support and drive the inner tube 7 to rotate axially to achieve switching of the welding surface of the steel component surface. When switching, the fourth motor 27 is started to drive the gear 6 to rotate the outer gear ring 8. When the outer gear ring 8 rotates, it drives the inner tube 7 to rotate. When the inner tube 7 rotates, it drives the square tube 2 and the inner skeleton 10 to rotate synchronously. In this way, the workpiece can be flipped to switch the welding surface.

[0052] Embodiment 2: Based on embodiment 1, the difference is that;

[0053] See attached Figure 3-9The positioning mechanism includes a positioning ring 32, which is fixed on the inner edge of the opening of the inner tube 7. The inner edge of the opening of the inner tube 7 is sleeved with an inner gear ring 31. A limit ring 25 is arranged on one side of the inner gear ring 31. The limit ring 25 is fixed on the opening edge of the inner tube 7. The side wall of the positioning ring 32 is rotatably connected with a plurality of bidirectional screw rods 30 through a rolling bearing. One end of the plurality of bidirectional screw rods 30 is rotatably connected to the inner side of the inner tube 7 through a bearing seat. The other end of the bidirectional screw rod 30 is fixedly connected with a driving gear 22. The driving gear 22 is meshed with the inner gear ring 31. Two threaded sleeves 29 are sleeved on the rod wall of the bidirectional screw rod 30. The side walls of the two threaded sleeves 29 are fixedly connected with two pins. Two circular rings 9, the inner sides of the two circular rings 9 are fixedly connected with a plurality of lifting ears, wherein two lifting ears are respectively sleeved on the side walls of the two axle pins, the threaded sleeve 29 is rotatably connected with a plurality of push rods 28 through the pin shaft, the side wall of the inner circular tube 7 is fixedly connected with two rectangular sleeves 20, the two rectangular sleeves 20 are jointly sleeved with a T-shaped frame 15, the side wall of the T-shaped frame 15 is rotatably connected with one end of the plurality of push rods 28 through a pin, a positioning roller 13 is rotatably connected with the T-shaped frame 15 through a support shaft, a positioning groove is provided on the side wall of the positioning roller 13, a first motor 26 is fixedly connected with the edge of the inner circular tube 7 through a support, the output end of the first motor 26 is fixedly connected with one end of one of the bidirectional screw rods 30, and the drive assembly is fixed on the T-shaped frame 15.

[0054] The driving assembly includes two brackets 14, and the side walls of the two brackets 14 are rotatably connected to two connecting shafts through rolling bearings. A synchronous belt 33 is provided at the lower end of the bracket 14, and two synchronous wheels 34 are wound around the synchronous belt 33. The two synchronous wheels 34 are respectively fixed on the shaft walls of the two connecting shafts, and the connecting shaft is fixedly connected to the upper end of the supporting shaft. One side of the bracket 14 is fixed to one side of the T-shaped frame 15 through a connecting block, and the other side of the bracket 14 is fixedly connected to a reduction motor 21, and the output end of the reduction motor 21 is fixedly connected to one end of one of the connecting shafts.

[0055] Reference Figure 1-2The present invention is provided with a positioning mechanism and a driving assembly. When welding the inner frame 11 and the square tube 2, the workpiece to be welded is first hoisted near the welding center and one end of the workpiece is inserted into the inner tube 7 through the auxiliary support mechanism 3. After insertion, the first motor 22 is started to rotate and drive the driving gear 22 to drive the inner gear ring 31 to make multiple driving gears 22 rotate synchronously. When the driving gear 22 rotates, it drives multiple bidirectional screws 30 to rotate so that two threaded sleeves 29 installed on the rod wall move relatively. When the threaded sleeve 29 moves, it drives the push rod 28 to move the T-shaped frame 15. When the T-shaped frame 15 moves, it drives the positioning roller 13 to move and use the positioning slot to clamp The right angle of the square tube 2 is connected. At this time, the positioning grooves are in contact with the two sides of the right angle of the square tube 2 respectively, so that the positioning and pressing function can be achieved. When in contact with the side plates of the inner frame, the positioning rollers 13 can be used to press the side plates in multiple directions. In this way, the welding stress can be suppressed during welding to avoid deformation during welding. During the welding process, the reduction motor 21 is started to drive the connecting shaft to rotate the support shaft. At the same time, the positioning rollers 13 on the two support shafts can be driven to rotate through the synchronous wheel 34 and the synchronous belt 33. The rotation of the positioning rollers 13 can transport the square tube 2 or the inner frame 11, so that the welding operation can be carried out in cooperation with the welding gun head 17.

[0056] Embodiment 3: Based on embodiment 1, the difference is that;

[0057] See attached Figure 9-10 The welding mechanism includes a welding gun head 17, a first guide rail 5 and a second guide rail 4. The first guide rail 5 is fixed to the side wall of the outer ring 9. A first slide 12 is sleeved on one side of the first guide rail 5. A second slide 35 is fixedly connected to one side of the first slide 12. The second guide rail 4 is slidably connected in the second slide 35. A second motor 23 is fixedly connected to one side of the first slide 12. The output end of the second motor 23 extends into the first slide 12 and is fixedly connected to a gear shaft 46. A rack 40 is meshed on one side of the gear shaft 46. The rack 40 is embedded and fixed in the first guide rail 5. One side of the second guide rail 4 is rotatably connected through a bearing seat. There is a screw rod 45, a threaded tube 44 is threadedly connected to the rod wall of the screw rod 45, a worm wheel 43 is fixedly connected to the side wall of the threaded tube 44, a worm 41 is meshed with one side of the worm wheel 43, a third motor 24 is fixedly connected to one side of the first slide seat 12, an output end of the third motor 24 is fixedly connected to one end of the worm 41, two sleeves 42 are fixedly connected to the side wall of the second slide seat 35, the two sleeves 42 are both sleeved on the rod wall of the screw rod 45, the lower end of the threaded tube 44 is fixedly connected to the upper end of one of the sleeves 42, the welding gun head 17 is fixed on one side of the second guide rail 4, and the grinding mechanism is installed on the other side of the second guide rail 4.

[0058] The grinding mechanism includes a support plate 37, and the side wall of the support plate 37 is sleeved with a plurality of guide columns 39 through guide holes. The upper and lower ends of the plurality of guide columns 39 are respectively fixedly connected with a mounting plate 36 and a fixing plate 38. The side wall of the fixing plate 38 is fixedly connected with a spindle motor 19, and the output end of the spindle motor 19 is fixedly connected with a grinding head. The side wall of the mounting plate 36 is sleeved with the side wall of the spindle motor 19 through a circular hole, and the side wall of the support plate 37 is fixedly connected with an electric push rod 18, and the output end of the electric push rod 18 passes through the side wall of the mounting plate 36 and is fixedly connected to the upper end of the fixing plate 38. The side wall of the mounting plate 36 is provided with two assembly holes that match the side walls of the electric push rod 18 and the spindle motor 19.

[0059] The welding mechanism and grinding mechanism provided in the present invention, when in use, the second motor 23 rotates to drive the gear shaft 46 to roll on the rack 40, at this time the first slide 12 can drive the second slide 35 to make the second guide rail 4 move laterally, at this time the lateral position of the welding gun head 17 can be adjusted, by starting the third motor 24 to drive the worm 41 to rotate the worm wheel 43, the rotation of the worm wheel 43 drives the threaded tube 44 to rotate, when the threaded tube 44 rotates, the screw 45 is driven to make the second guide rail 4 slide on the second slide 35, at this time the second guide rail 4 can be used to move the welding gun head 17 in the vertical direction, so The welding angle and position of the welding gun head 17 can be adjusted by lateral and vertical movement. After welding is completed, the electric push rod 18 is started to drive the fixed plate 38 to move the spindle motor 19 downward. When the spindle motor 19 moves downward, the grinding head contacts the welding point on the workpiece, so that grinding operation can be carried out after welding. The same motion mechanism as the welding gun head 17 is used for grinding. At the same time, the positioning mechanism and the conveying mechanism can also be used for conveying, so that grinding can be carried out directly after welding, and there is no need to remove the workpiece from the welding center many times. The grinding speed is fast and the grinding accuracy is high.

[0060] The present invention provides a processing technology for a column for a frame type hydraulic press, comprising the following steps:

[0061] Step 1: CNC cutting of steel plates. Use a laser cutting machine to cut out the steel components of the columns. The steel components include steel plate blanks, side panels and edge panels. Through holes are cut synchronously on the steel plate blanks, rectangular holes are opened on the side panels, welding grooves are milled on the side panels, and grooves with an angle of 45° are opened at both ends of the side panels. The steel plate blank is a rectangular structure. The length of the steel plate blank is the height of the column, and the width is the circumference of the column. The through holes of multiple long strip structures cut out of the steel plate blank are distributed in a rectangular array. The length of multiple side panels cut out by the laser cutting machine is the same as the length of the column, and the cross section of the welding groove milled on the surface of the side panel is V-shaped.

[0062] Step 2: Hardening of steel components: Use a shot peening machine to perform the first shot peening hardening on the cut steel plate blank, side plate and edge plate. The shot peening intensity during the first shot peening hardening is 0.40-0.50mmA, and the coverage rate is 200%. The steel shot uses a hardness of 55-62HRC.

[0063] Step 3: Bending the steel components: Use a bending machine to bend the steel plate blank three times to form a rectangular structure. The right-angle gap formed after bending is the welding point. Use a bending machine to bend multiple side plates. The width of the folded edge after bending is 5-8cm, and the bending angle is 45°.

[0064] Step 4: Assemble the inner frame 10. The inner frame 10 is composed of multiple crosses riveted in multiple side panels. The cross spacing is the same as the rectangular holes on the side panels. First, use bolts to pass through the rectangular holes to fix the ends of the crosses. Manually arrange the side panels between adjacent side panels, and keep the spacing consistent with the cross spacing. Use a welding machine to spot weld and fix them.

[0065] Step 5, assembly welding, hoist the assembled inner frame 10 at the welding center, weld the rectangular holes on the side plates, at this time the rectangular holes form a molten pool and are firmly welded to the end of the cross, weld the grooves connected to the folded edges of the side plates, at this time the grooves and the folded edges form a welding molten pool, insert the welded inner frame 10 into the square tube 2, ensure that the folded edges of the side plates are in contact with the inner sides of the square tube 2, and then hoist the assembled square tube 2 and the inner frame 10 together at the welding center, with the right-angle gap on the square tube 2 facing upward, and then use the positioning mechanism to position the square tube 2, at this time you can first weld the weld of the square tube 2, after the weld is completed, weld the molten pool composed of the through holes and welding grooves on the surface of the square tube 2, so that the side plate is connected to the tube wall of the square tube 2, and use the preheating component 11 to preheat the surface of the steel member before welding during assembly welding, wherein the preheating component 11 is installed on one side of the welding gun head 17, to achieve direct welding after preheating, and the preheating speed is synchronized with the welding speed;

[0066] Step 6: The surface of the square tube 2 is subjected to secondary shot peening hardening. The welding points on the surface of the square tube 2 are annealed after preliminary grinding. During annealing, the temperature of the column surface is raised to the annealing temperature by adjusting the power of the preheating component 11. After annealing, the surface of the square tube 2 is cooled to room temperature, and then the surface of the square tube 2 is subjected to secondary shot peening by a shot peening machine. The shot peening intensity during the secondary shot peening hardening is 0.20-0.30mmA, and the coverage rate is 150%. The steel shot also uses a shot with a hardness of 55-62HRC.

[0067] Step 7: Machining the surface of the other tube 2, drilling holes at fixed positions and processing threads in the holes according to technical requirements, and then checking the error of the column, generating a report for the inspection results and making a proof. Each column needs to have an inspection report and be signed and confirmed by the quality inspector;

[0068] Step 8. After the inspection project is completed, spray epoxy primer and topcoat for anti-corrosion treatment. After the paint surface is dry, the column for the frame hydraulic press is obtained.

[0069] In the column processing technology provided by the present invention, all steel components used for the column are shot peened by a shot peening machine. During the shot peening, a high-speed projectile flow is sprayed onto the surface of the part to cause plastic deformation of the surface layer of the part to form a strengthening layer of a certain thickness. A higher residual stress is formed in the strengthening layer. When the part is subjected to a load, the residual stress involved can offset a part of the stress, thereby improving the fatigue strength of the part. In addition, a secondary shot peening is performed again after welding is completed to re-form a strengthening layer at the welding point, so that the hardness of the strengthening layer on the surface of the column is uniform. After the secondary shot peening, annealing can be performed. During annealing, the power of the preheating component 11 is adjusted to increase the temperature of the column surface to the annealing temperature. In this way, the primer can be sprayed after cooling, and the surface glossiness of the workpiece is reduced after shot peening, which can greatly increase the adhesion between the workpiece and the primer.

[0070] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A processing device for a column for a frame type hydraulic press, comprising a welding center, characterized in that: The welding center is composed of a positioning mechanism, a welding mechanism, a reversing assembly, a driving assembly, a preheating assembly (11), a grinding mechanism, and a plurality of auxiliary support mechanisms (3); The welding center is further provided with an outer circular tube (1) and an inner circular tube (7). The positioning mechanism is installed in the inner circular tube (7). The positioning mechanism comprises a positioning ring (32). The positioning ring (32) is fixed to the inner edge of the opening of the inner circular tube (7). The inner edge of the opening of the inner circular tube (7) is sleeved with an inner gear ring (31). A limiting ring (25) is provided on one side of the inner gear ring (31). The limiting ring (25) is fixed to the edge of the opening of the inner circular tube (7). The side wall of the positioning ring (32) is rotatably connected to a plurality of bidirectional screw rods (30) via rolling bearings. One end of each of the plurality of bidirectional screw rods (30) is rotatably connected to the inner side of the inner circular tube (7) via a bearing seat. The other end of the bidirectional screw rod (30) is fixedly connected to a driving gear (22). The driving gear (22) meshes with the inner gear ring (31). Two threaded sleeves (29) are sleeved on the rod wall of the bidirectional screw rod (30), and the side walls of the two threaded sleeves (29) are fixedly connected to two pin shafts. Two circular rings (9) are slidably sleeved in the inner tube (7), and the inner sides of the two circular rings (9) are fixedly connected to a plurality of lifting ears, wherein two of the lifting ears are sleeved on the side walls of two shaft pins respectively, and the threaded sleeve (29) is rotatably connected to a plurality of push rods (28) through the pin shaft. Two rectangular sleeves (20) are fixedly connected to the side wall of the inner tube (7), and the two rectangular sleeves (20) are commonly sleeved with a T-shaped frame (15), and the side wall of the T-shaped frame (15) is rotatably connected to one end of the plurality of push rods (28) through a pin. A positioning roller (13) is rotatably connected in the T-shaped frame (15) through a support shaft, and a positioning groove is provided on the side wall of the positioning roller (13); A first motor (26) is fixedly connected to the edge of the inner tube (7) via a support, an output end of the first motor (26) is fixedly connected to one end of one of the bidirectional screw rods (30), and the drive assembly is fixed on a T-shaped frame (15); The driving assembly is integrated and assembled on the positioning mechanism, so as to realize directional conveying of the steel component during welding, and at the same time realize pressing the steel component to reduce welding stress; The reversing assembly is installed in the outer circular tube (1) to support and drive the inner circular tube (7) to rotate along the axial direction, thereby switching the welding surface of the steel component surface; The grinding mechanism is integrated and assembled on the welding mechanism to grind and shape the welding point after welding is completed; The steel component is composed of a square tube (2) formed by bending a steel plate blank and an inner frame (10); the inner frame (10) is composed of a cross, a side plate and a side plate; the square tube (2), the inner frame (10) and the assembled columns are all welded, polished and annealed in a welding center.

2. The processing equipment for a column for a frame type hydraulic press according to claim 1 is characterized in that: The drive assembly comprises two brackets (14), the side walls of the two brackets (14) are rotatably connected to two connecting shafts via rolling bearings, a synchronous belt (33) is provided at the lower end of the bracket (14), two synchronous wheels (34) are wound around the synchronous belt (33), the two synchronous wheels (34) are respectively fixed on the shaft walls of the two connecting shafts, the connecting shaft is fixedly connected to the upper end of the support shaft, one side of the bracket (14) is fixed to one side of the T-shaped frame (15) via a connecting block, the other side of the bracket (14) is fixedly connected to a reduction motor (21), and the output end of the reduction motor (21) is fixedly connected to one end of one of the connecting shafts.

3. The processing equipment for a column for a frame type hydraulic press according to claim 1, characterized in that: The welding mechanism comprises a welding gun head (17), a first guide rail (5) and a second guide rail (4), wherein the first guide rail (5) is fixed to the side wall of the outer ring (9), a first slide seat (12) is sleeved on one side of the first guide rail (5), a second slide seat (35) is fixedly connected to one side of the first slide seat (12), the second guide rail (4) is slidably connected in the second slide seat (35), a second motor (23) is fixedly connected to one side of the first slide seat (12), an output end of the second motor (23) extends into the first slide seat (12) and is fixedly connected to a gear shaft (46), a rack (40) is meshed on one side of the gear shaft (46), the rack (40) is embedded and fixed in the first guide rail (5), and a second guide rail (4) is rotatably connected to one side of the second slide seat (35) via a bearing seat. A screw rod (45), a threaded tube (44) is threadedly connected to the rod wall of the screw rod (45), a worm wheel (43) is fixedly connected to the side wall of the threaded tube (44), a worm wheel (41) is meshed with one side of the worm wheel (43), a third motor (24) is fixedly connected to one side of the first slide seat (12), an output end of the third motor (24) is fixedly connected to one end of the worm wheel (41), two shaft sleeves (42) are fixedly connected to the side wall of the second slide seat (35), the two shaft sleeves (42) are both sleeved on the rod wall of the screw rod (45), the lower end of the threaded tube (44) is fixedly connected to the upper end of one of the shaft sleeves (42), the welding gun head (17) is fixed to one side of the second guide rail (4), and the grinding mechanism is installed on the other side of the second guide rail (4).

4. The processing equipment for a column for a frame type hydraulic press according to claim 3 is characterized in that: The grinding mechanism comprises a support plate (37), a side wall of the support plate (37) being sleeved with a plurality of guide columns (39) through guide holes, upper and lower ends of the plurality of guide columns (39) being fixedly connected to a mounting plate (36) and a fixing plate (38) respectively, a side wall of the fixing plate (38) being fixedly connected to a spindle motor (19), an output end of the spindle motor (19) being fixedly connected to a grinding head, a side wall of the mounting plate (36) being sleeved with the side wall of the spindle motor (19) through a circular hole, a side wall of the support plate (37) being fixedly connected to an electric push rod (18), an output end of the electric push rod (18) penetrating the side wall of the mounting plate (36) and being fixedly connected to an upper end of the fixing plate (38), and a side wall of the mounting plate (36) being provided with two assembly holes matching the side wall of the electric push rod (18) and the side wall of the spindle motor (19).

5. The processing equipment for a column for a frame type hydraulic press according to claim 1, characterized in that: The reversing assembly comprises two outer toothed rings (8), the side walls of the two outer toothed rings (8) are each provided with two limiting portions, the outer toothed rings (8) are fixed to the side walls of the inner tube (7) and mesh with a plurality of gears (6), the side walls of the gears (6) are rotatably connected to a support seat via a rotating shaft, the support seat is fixed to the inner side of the outer tube (1), a mounting seat is fixedly connected to the edge of the outer tube (1), a fourth motor (27) is fixedly connected to the side wall of the mounting seat, an output end of the fourth motor (27) passes through the side wall of the mounting seat and is fixedly connected to one end of the rotating shaft, and the side wall of the outer tube (1) is fixedly connected to a base.

6. The processing equipment for a column for a frame type hydraulic press according to claim 1, characterized in that: The preheating component (11) comprises an electromagnetic induction coil, the outer side of the electromagnetic induction coil is fixedly connected to a heat insulation cover, the side wall of the heat insulation cover is fixedly connected to a plurality of connecting pieces (16), the plurality of connecting pieces (16) are all fixed at the edge of the inner circular tube (7), and the electromagnetic induction coil is a polygonal structure.

7. A process for processing a column for a frame type hydraulic press using the processing equipment according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: CNC cutting of steel plates. Use a laser cutting machine to cut out the steel components of the columns. The steel components include steel plate blanks, side plates and edge plates. Cut through holes on the steel plate blanks, open rectangular holes on the edge plates, mill welding grooves on the side plates, and open grooves with an angle of 45° at both ends of the side plates. Step 2: Hardening of steel components: Use a shot peening machine to perform the first shot peening hardening on the cut steel plate blanks, side plates and edge plates; Step 3: Bending the steel components: Use a bending machine to bend the steel plate blank three times to form a rectangular structure. The right-angle gap formed after bending is the welding point. Use a bending machine to bend multiple side plates. The width of the folded edge after bending is 5-8cm, and the bending angle is 45°. Step 4: Assemble the inner frame (10). The inner frame (10) is composed of a plurality of crosses riveted to a plurality of side plates. The spacing between the crosses is the same as the rectangular holes on the side plates. Bolts are first passed through the rectangular holes to fix the ends of the crosses. The side plates are manually arranged between adjacent side plates with the spacing being consistent with the spacing between the crosses. The side plates are then fixed by spot welding using a welding machine. Step 5: Assemble and weld. Hoist the assembled inner frame (10) at the welding center. Weld the rectangular holes on the side plates. At this time, the rectangular holes form a molten pool and are firmly welded to the cross end. Weld the grooves connecting the side plates and the folded edges on the side plates. At this time, the grooves and the folded edges form a welding molten pool. Insert the welded inner frame (10) into the square tube (2). Ensure that the folded edges of the side plates are in contact with the inner side of the square tube (2). Then, hoist the assembled square tube (2) and the inner frame (10) together at the welding center. Place the square tube (2) on the inner frame (10). The right-angled gap faces upward, and then the square tube (2) is positioned by a positioning mechanism. At this time, the weld of the square tube (2) can be welded first. After the weld is completed, the side plate is connected to the tube wall of the square tube (2) in a molten pool formed by the through holes and the welding grooves on the surface of the square tube (2). During assembly welding, a preheating component (11) is used to preheat the surface of the steel component before welding, wherein the preheating component (11) is installed on one side of the welding gun head (17) to achieve direct welding after preheating, and the preheating speed is synchronized with the welding speed; Step 6: The surface of the square tube (2) is subjected to secondary shot peening hardening. The weld points on the surface of the square tube (2) are subjected to annealing treatment after preliminary grinding. During annealing, the power of the preheating component (11) is adjusted to raise the temperature of the column surface to the annealing temperature. After the annealing, the surface of the square tube (2) is cooled to room temperature, and a shot peening machine is used to perform secondary shot peening treatment on the surface of the square tube (2); Step 7: Machining the surface of the other tube (2), drilling holes at fixed positions and processing threads in the holes according to technical requirements, and then checking the error of the column. The inspection results are reported and proofed. Each column needs to have an inspection report and be signed and confirmed by the quality inspection personnel; Step 8. After the inspection project is completed, spray epoxy primer and topcoat for anti-corrosion treatment. After the paint surface is dry, the column for the frame hydraulic press is obtained.

8. The processing technology of the column for the frame type hydraulic press according to claim 7 is characterized in that: The shot peening intensity during the first shot peening is 0.40-0.50mmA, and the coverage is 200%. The steel shot uses a shot with a hardness of 55-62HRC. The shot peening intensity during the second shot peening is 0.20-0.30mmA, and the coverage is 150%. The steel shot also uses a shot with a hardness of 55-62HRC.

9. The processing technology of the column for the frame type hydraulic press according to claim 7 is characterized in that: The steel plate blank is a rectangular structure, the length of the steel plate blank is the height of the column, the width is the circumference of the column, and the through holes of multiple long strip structures cut on the steel plate blank are distributed in a rectangular array. The length of multiple side panels cut by the laser cutting machine is the same as the length of the column, and the cross-section of the welding groove milled on the surface of the side panel is V-shaped.

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