Machining tool clamp and method special for harvesting header main beam

Abstract

The invention relates to a machining tool clamp and method special for a harvesting header main beam, and belongs to the technical field of harvesting header manufacturing. According to the technical scheme, a bottom supporting assembly (1) and a tool clamp assembly (2) are connected through a shaft sleeve (232) and a shaft (16), a harvesting header main beam is positioned in the tool clamp assembly, and four side faces of a bottom cross beam of the harvesting header main beam are machined; the tool clamp assembly can turn over on the bottom supporting assembly through the shaft sleeve and the shaft, and after the harvesting header main beam turns over along with the tool clamp assembly, one top face of a top vertical beam of the harvesting header main beam is machined. According to the special machining tool clamp, the tool clamp assembly of the special machining tool clamp is matched with the bottom supporting assembly, the harvesting header main beam is fixed and measured at a time, the harvesting header main beam is positioned, clamped and turned over, machining of the four side faces of the bottom cross beam and one face of the top of the top vertical beam is completed in one procedure, and the machining efficiency is improved. The problems of low machining efficiency and complicated disassembly and assembly are solved.

Description

Technical Field

[0001] The invention relates to a special machining fixture and method for a main beam of a harvesting header, and belongs to the technical field of harvesting header manufacturing. Background Art

[0002] Fixtures are commonly used auxiliary tools in mechanical processing. Their main function is to position and fix parts. For machining of a specific beam, a machine tool is needed to bore, tap and mill the beam. The four surrounding surfaces and one top surface need to be processed. During the machining process, the workpiece needs to be stable, the benchmark needs to be determined, and the machining accuracy needs to be guaranteed.

[0003] The main beam of the harvesting platform is an important part of the harvesting platform. The main beam of the harvesting platform is composed of a bottom cross beam and a top vertical beam. The whole is L-shaped. A round tube is also provided at the connection between the bottom cross beam and the top vertical beam. During the production process, the four sides of the bottom cross beam need to be processed, and the top surface of the top vertical beam also needs to be processed. During the processing, the main beam of the harvesting platform needs to be turned over and clamped. The equipment with the existing technology cannot complete the four sides of the bottom cross beam and the top surface of the top vertical beam in the same processing step, and at least two processing steps are required. During the processing, it is necessary to first fix the bottom cross beam of the main beam of the harvesting platform, measure whether the bottom cross beam is horizontal and vertical, and then process the four sides of the bottom cross beam. When processing the top surface of the top vertical beam, the main beam of the harvesting platform needs to be removed, turned over and laid flat, re-positioned and measured, and then the top surface of the top vertical beam is processed. The two-step processing makes the processing of the harvesting platform main beam complicated, and workers are required to fix, remove and measure the harvesting platform main beam many times, resulting in a long processing time and low processing efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a special machining fixture and method for the main beam of a harvesting platform. By cooperating the fixture assembly of the special machining fixture with the bottom support assembly, the main beam of the harvesting platform is fixed and measured once, and the main beam of the harvesting platform is positioned, clamped and flipped, so that the processing of the four side surfaces of the bottom cross beam and the top surface of the top vertical beam can be completed in one process, thereby solving the problems of low processing efficiency and complicated disassembly and assembly.

[0005] The technical solution of the present invention is as follows: A special machining fixture for the main beam of a harvesting platform, the main beam of the harvesting platform is composed of a bottom cross beam and a top vertical beam, and is L-shaped as a whole, and a round tube is provided at the connection between the bottom cross beam and the top vertical beam; the special machining fixture for the main beam of the harvesting platform comprises a bottom support assembly and a fixture assembly, the bottom support assembly is provided with a fixture assembly, the bottom support assembly and the fixture assembly are connected through a shaft sleeve and a shaft, the main beam of the harvesting platform is positioned in the fixture assembly, and the bottom cross beam of the main beam of the harvesting platform is processed on four sides; after the main beam of the harvesting platform is turned over with the fixture assembly, a top surface of the top vertical beam of the main beam of the harvesting platform is processed; The bottom support assembly comprises a long support square tube, a short support square tube, a bottom support plate, a base square tube and an axis. The two short support square tubes, the two long support square tubes and the three base square tubes are placed parallel to each other and are perpendicular to the bottom support plate. The upper and lower parts of the bottom support plate are provided with multiple grooves, and the upper part is also provided with a circular hole. There are multiple bottom support plates, which are arranged parallel to each other; the two short support square tubes, the two long support square tubes and the three base square tubes are respectively embedded in the grooves of the bottom support plate and welded to the bottom support plate; the three base square tubes are respectively embedded in the lower grooves of the bottom support plate, and the two short support square tubes and the two long support square tubes are respectively embedded in the upper grooves of the bottom support plate; the axis is embedded in the upper circular hole of the bottom support plate, and multiple shaft sleeves match multiple shafts; the outermost base square tube is provided with a lower positioning plate, and a locking nut is provided on the lower positioning plate; The tooling fixture assembly comprises a front end support, a middle support, a tail support, a reinforcement frame, a reinforcement square tube and a sleeve; the bottoms of the front end support, the middle support, the tail support and the reinforcement frame are all vertically welded to the reinforced square tube in sequence, and the bottoms of the front end support, the middle support and the tail support are each provided with two circular holes, which are respectively inserted and matched with the corresponding sleeves; the upper part of the reinforcement frame extends to the upper part of the tail support and is fixedly connected to the upper part of the tail support; the front end support, the middle support and the tail support are each provided with a U-shaped groove, and the bottom cross beam of the harvesting cutting platform main beam is placed in the U-shaped groove, and a locking plate is provided on the U-shaped groove, and the U-shaped groove is closed and locked in position by the locking plate; the upper part of the tail support is provided with a cover plate support, and the cover plate support is provided with a U-shaped top end cover plate, and the top vertical beam of the harvesting cutting platform main beam is positioned in the U-shaped top end cover plate.

[0006] The reinforcement frame includes a frame body, an inclined beam and a lap beam. The frame body is arranged perpendicular to the reinforcement square tube. The top end of the frame body extends the lap beam in the direction close to the tail support. The lap beam is parallel to the reinforcement square tube. The lap beam is welded to the top of the tail support. The other end of the top of the frame body is connected to one end of the inclined beam, and the other end of the inclined beam is connected to the lap beam. The top of the frame body, the inclined beam and the lap beam form a right triangle.

[0007] The inclined beam is provided with a tail fixing group, which includes a connecting plate, a tightening screw, a U-shaped baffle, a middle partition, a profiling pressure plate, a locking nut three and a locking nut four. The connecting plate is fixed on the inclined beam, and the upper part of the tightening screw is set on the connecting plate through the locking nut three; the center of the U-shaped baffle is provided with a circular hole three, the U-shaped baffle is welded to the middle partition, and a locking nut four is arranged in the space between the U-shaped baffle and the middle partition, and the lower end of the tightening screw passes through the circular hole three in the center of the U-shaped baffle and then welds the locking nut four; the lower part of the middle partition is provided with a profiling pressure plate, and the bottom of the profiling pressure plate is in an arc shape, which matches the shape of the round tube at the connection between the bottom cross beam and the top vertical beam. When the tightening screw is rotated, the locking nut four moves up and down and is restricted by the U-shaped baffle and the middle partition, and the U-shaped baffle and the middle partition move with the movement of the locking nut four, thereby driving the profiling pressure plate to move, and the profiling pressure plate is pressed on the round tube to press and position the round tube of the main beam of the harvesting table.

[0008] A triangular support is provided between the inclined beam and the connecting plate to increase strength.

[0009] The cross beam at the bottom of the frame body is welded to the reinforced square tube.

[0010] The tail of the bottom support assembly is provided with a tail fine-tuning seat, which is arranged on a fine-tuning positioning plate, and the fine-tuning positioning plate is welded to the base square tube. The tail fine-tuning seat is provided with a tail fine-tuning bolt, which will be fixed to the fine-tuning positioning plate with the tail fine-tuning seat.

[0011] A reinforcement base is arranged between the two adjacent bottom square tubes, and two sides of the reinforcement base are respectively welded to the adjacent base square tubes.

[0012] There are three bottom support plates, which are arranged parallel to each other.

[0013] The shaft side is provided with a shaft sleeve cover plate, which fixes the shaft in the upper circular hole of the bottom support plate; the bottom square tube is also provided with a support reinforcement plate, through which the shaft passes, and the support reinforcement plate supports and reinforces the shaft. The support reinforcement plate is a bent structure, and the bent part is welded to the bottom support plate. The shaft sleeve cover plate is welded on one side of the shaft and welded to the bottom support plate. The shaft sleeve is sleeved on the shaft.

[0014] A method for processing a main beam of a harvesting platform, using the above-mentioned special machining fixture to position, clamp and flip the main beam of the harvesting platform; the bottom support assembly is connected to the fixture assembly through a bushing and a shaft, the main beam of the harvesting platform is positioned in the fixture assembly, and the four sides of the bottom cross beam of the main beam of the harvesting platform are processed; the fixture assembly can be flipped on the bottom support assembly through the bushing and the shaft, and after the main beam of the harvesting platform is flipped with the fixture assembly, a top surface of the top vertical beam of the main beam of the harvesting platform is processed.

[0015] The bottom cross beam of the harvesting platform main beam is placed in the U-shaped grooves of the front end support, the middle support and the tail support, and the U-shaped grooves are closed and locked in place by locking plates; the top vertical beam of the harvesting platform main beam is positioned in the U-shaped top cover plate on the top of the tail support; the contoured pressure plate of the tail fixing group is pressed against the round tube to press the round tube of the harvesting platform main beam into place.

[0016] The beneficial effects of the present invention are as follows: through the cooperation between the fixture assembly of the special machine processing fixture and the bottom support assembly, the main beam of the harvesting cutter platform is fixed and measured once, and the main beam of the harvesting cutter platform is positioned, clamped and flipped, so that the processing of the four side surfaces of the bottom cross beam and the top surface of the top vertical beam can be completed in one process, thereby solving the problems of low processing efficiency and complicated disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of an embodiment of the invention; Figure 2 This is a three-dimensional diagram after flipping over an embodiment of the invention; Figure 3 A three-dimensional diagram of a base support assembly according to an embodiment of the invention; Figure 4 A three-dimensional diagram of a fixture assembly according to an embodiment of the invention; Figure 5 A three-dimensional diagram of a tail fixing group according to an embodiment of the present invention; Figure 6 A three-dimensional diagram of a fixed frame of an embodiment of the invention; In the figure: bottom support assembly 1, base square tube 11, reinforced base 12, bottom support plate 13, long support square tube 14, locking nut 15, shaft 16, sleeve cover 17, support reinforcement plate 18, fine-tuning positioning plate 19, tail fine-tuning seat 110, tail fine-tuning bolt 111, lower positioning plate 112, short support square tube 113, fixture assembly 2, front end fine-tuning bolt 21, front end support 22, side positioning bolt 23, limit screw 24, pin 25, positioning bolt 26, locking plate 27, front end cover plate 28, front end adjustment bolt 29, upper positioning plate 1 210, positioning plate 211, middle support 212, locking nut 213, long locking bolt 214, middle cover plate 215, tail support 216, cover support 217, top cover plate 218, top fixed Positioning bolt 219, bolt baffle 220, top positioning plate 221, top rotating bolt 222, top clamping bolt 223, connecting plate 223-1, triangular support 223-2, clamping screw 223-3, U-shaped baffle 223-4, middle partition 223-5, contoured pressure plate 223-6, locking nut three 223-7, locking nut four 223-8, top pressure plate 224, middle adjusting bolt 225, tail adjusting bolt 226, upper positioning plate two 227, locking bolt 228, tail fixing group 229, reinforced square tube 230, reinforced frame 231, frame body 231-1, inclined beam 231-2, lap beam 231-3, cross beam 231-4, bushing 232, harvesting header main beam 3, bottom cross beam 31, top vertical beam 32, round tube 33. DETAILED DESCRIPTION

[0018] The present invention is further described in detail by the following examples.

[0019] A special machining fixture for the main beam of a harvesting platform, wherein the main beam 3 of the harvesting platform is composed of a bottom cross beam 31 and a top vertical beam 32, and is L-shaped as a whole. A round tube 33 is provided at the connection between the bottom cross beam 31 and the top vertical beam 32; the special machining fixture for the main beam of the harvesting platform comprises a bottom support assembly 1 and a fixture assembly 2, wherein the bottom support assembly 1 is provided with a fixture assembly 2, and the bottom support assembly 1 and the fixture assembly 2 are connected through a shaft sleeve 232 and a shaft 16, the main beam 3 of the harvesting platform is positioned in the fixture assembly 2, and four side surfaces of the bottom cross beam 31 of the main beam 3 of the harvesting platform are processed; after the main beam 3 of the harvesting platform is turned over with the fixture assembly 2, a top surface of the top vertical beam 32 of the main beam 3 of the harvesting platform is processed; The bottom support assembly 1 comprises a long support square tube 14, a short support square tube 113, a bottom support plate 13, a base square tube 11 and an axis 16. The two short support square tubes 113, the two long support square tubes 14 and the three base square tubes 11 are placed parallel to each other and are perpendicular to the bottom support plate 13. The bottom support plate 13 is provided with a plurality of grooves at the upper and lower parts, and a circular hole 1 is also provided at the upper part. There are multiple bottom support plates 13, which are arranged parallel to each other; the two short support square tubes 113, the two long support square tubes 14 and the three base square tubes 11 are placed parallel to each other and are perpendicular to the bottom support plate 13. The base square tubes 11 are respectively embedded in the grooves of the bottom support plate 13 and welded to the bottom support plate 13; the three base square tubes 11 are respectively embedded in the lower grooves of the bottom support plate 13, and the two short support square tubes 113 and the two long support square tubes 14 are respectively embedded in the upper grooves of the bottom support plate 13; the shaft 16 is embedded in the upper circular hole 1 of the bottom support plate 13, and the multiple shaft sleeves 232 match the multiple shafts 16; the outermost base square tube 11 is provided with a lower positioning plate 112, and a locking nut 15 is provided on the lower positioning plate 112; The fixture assembly 2 comprises a front support 22, a middle support 212, a rear support 216, a reinforcement frame 231, a reinforcement square tube 230 and a sleeve 232; the bottoms of the front support 22, the middle support 212, the rear support 216 and the reinforcement frame 231 are vertically welded to the reinforcement square tube 230 in sequence, and the bottoms of the front support 22, the middle support 212 and the rear support 216 are each provided with two circular holes, which are respectively inserted and matched with the corresponding sleeves 232; the upper part of the reinforcement frame 231 extends toward the rear support 21 6 and is fixedly connected to the upper part of the tail support 216; the front end support 22, the middle support 212 and the tail support 216 are all provided with a U-shaped groove, the bottom cross beam 31 of the harvesting platform main beam 3 is placed in the U-shaped groove, and a locking plate 27 is provided on the U-shaped groove, and the U-shaped groove is closed and locked in position by the locking plate 27; the upper part of the tail support 216 is provided with a cover support 217, and the cover support 217 is provided with a U-shaped top end cover 218, and the top vertical beam 32 of the harvesting platform main beam 3 is positioned in the U-shaped top end cover 218.

[0020] The reinforcement frame 231 includes a frame body 231-1, an inclined beam 231-2 and a lap beam 231-3. The frame body 231-1 is arranged perpendicular to the reinforcement square tube 230. The top end of the frame body 231-1 extends the lap beam 231-3 in the direction close to the tail support 216. The lap beam 231-3 is parallel to the reinforcement square tube 230. The lap beam 231-3 is welded to the top of the tail support 216. The other end of the top of the frame body 231-1 is connected to one end of the inclined beam 231-2, and the other end of the inclined beam 231-2 is connected to the lap beam 231-3. The top of the frame body 231-1, the inclined beam 231-2 and the lap beam 231-3 form a right triangle.

[0021] The inclined beam 231-2 is provided with a tail fixing group 229, and the tail fixing group 229 includes a connecting plate 223-1, a tightening screw 223-3, a U-shaped baffle 223-4, a middle partition 223-5, a contoured pressure plate 223-6, a locking nut three 223-7 and a locking nut four 223-8. The connecting plate 223-1 is fixed on the inclined beam 231-2, and the upper part of the tightening screw 223-3 is set on the connecting plate 223-1 through the locking nut three 223-7; the U-shaped baffle 223-4 has a circular hole in the center 3. The U-shaped baffle 223-4 is welded to the middle partition 223-5, and a locking nut 223-8 is provided in the space between the U-shaped baffle 223-4 and the middle partition 223-5. The lower end of the clamping screw 223-3 passes through the circular hole 3 in the center of the U-shaped baffle 223-4 and then the locking nut 223-8 is welded; a contoured pressure plate 223-6 is provided under the middle partition 223-5, and the bottom of the contoured pressure plate 223-6 is in an arc shape, which matches the shape of the round tube 33 at the connection between the bottom cross beam 31 and the top vertical beam 32. By rotating the compression screw 223-3, the locking nut 223-8 moves up and down and is restricted by the U-shaped baffle 223-4 and the middle partition 223-5. The U-shaped baffle 223-4 and the middle partition 223-5 move with the movement of the locking nut 223-8, thereby driving the contoured pressure plate 223-6 to move. The contoured pressure plate 223-6 presses against the round tube 33 to press and position the round tube 33 of the harvesting table main beam 3.

[0022] A triangular support 223 - 2 is provided between the inclined beam 231 - 2 and the connecting plate 223 - 1 to increase strength.

[0023] The crossbeam 231 - 4 at the bottom of the frame body 231 - 1 is welded to the reinforced square tube 230 .

[0024] The tail of the bottom support assembly 1 is provided with a tail fine-tuning seat 110, and the tail fine-tuning seat 110 is arranged on a fine-tuning positioning plate 19. The fine-tuning positioning plate 19 is welded to the base square tube 11, and the tail fine-tuning seat 110 is provided with a tail fine-tuning bolt 111, which will be fixed to the fine-tuning positioning plate 19 with the tail fine-tuning seat 110.

[0025] A reinforcement base 12 is disposed between the two adjacent bottom square tubes 11 , and two sides of the reinforcement base 12 are respectively welded to the adjacent base square tubes.

[0026] There are three bottom support plates 13 arranged parallel to each other.

[0027] A shaft sleeve cover plate 17 is provided on the side of the shaft 16 to fix the shaft 16 in the upper circular hole 1 of the bottom support plate 13; a support reinforcement plate 18 is also provided on the bottom square tube 11, and the shaft 16 passes through the support reinforcement plate 18, and the support reinforcement plate 18 supports and reinforces the shaft 16. The support reinforcement plate 18 is a bent structure, and the bent part is welded to the bottom support plate 13. The shaft sleeve cover plate 17 is welded on one side of the shaft 16 and welded to the bottom support plate 13. The shaft sleeve 232 is sleeved on the shaft 16.

[0028] A method for processing a harvesting platform main beam, using the above-mentioned special machining fixture to position, clamp and flip the harvesting platform main beam; the bottom support component 1 is connected to the fixture component 2 through the shaft sleeve 232 and the shaft 16, the harvesting platform main beam 3 is positioned in the fixture component 2, and the four sides of the bottom cross beam 31 of the harvesting platform main beam 3 are processed; the fixture component 2 can be flipped on the bottom support component 1 through the shaft sleeve 232 and the shaft 16, and after the harvesting platform main beam 3 is flipped with the fixture component 2, a top surface of the top vertical beam 32 of the harvesting platform main beam 3 is processed.

[0029] The bottom cross beam 31 of the harvesting platform main beam 3 is placed in the U-shaped grooves of the front end support 22, the middle support 212 and the tail support 216, and the U-shaped grooves are closed and locked in position by the locking plate 27; the top vertical beam 32 of the harvesting platform main beam 3 is positioned in the U-shaped top cover plate 218 at the top of the tail support 216; the contoured pressure plate 223-6 of the tail fixing group 229 is pressed on the round tube 33 to press the round tube 33 of the harvesting platform main beam 3 into position.

[0030] In an embodiment, Figure 1 As shown, a special machining fixture for the main beam of a harvesting platform includes a bottom support component 1 and a fixture component 2. The bottom support component 1 is fixed on the base of the machine tool. The fixture component 2 is flippably connected to the bottom support component 1 and placed on the bottom support component. The main beam 3 of the harvesting platform is positioned and fixed by the fixture component 2; the main beam 3 of the harvesting platform is composed of a bottom cross beam 31 and a top vertical beam 32, and is L-shaped as a whole. A round tube 33 is provided at the connection between the bottom cross beam 31 and the top vertical beam 32; the four side surfaces of the bottom cross beam 31 of the main beam 3 of the harvesting platform are processed by a machine tool.

[0031] like Figure 2 As shown, the harvesting platform main beam 3 is fixed in the jig assembly 2. After the jig assembly 2 is flipped over, the jig assembly 2 is still placed on the bottom support assembly 1. The harvesting platform main beam 3 is flipped along with the jig assembly 2, and the top surface of the top vertical beam 32 of the harvesting platform main beam 3 is processed by a machine tool.

[0032] like Figure 1 , Figure 3 , Figure 4 As shown, the bottom support assembly 1 is connected to the fixture assembly 2 through the shaft sleeve 232 and the shaft 16. The shaft sleeve 232 passes through the corresponding bottom circular holes 2 of the front support 22, the middle support 212 and the tail support 216 and is welded thereto. The shaft 16 passes through the bottom support plate 13 and the upper circular hole 1 of the support reinforcement plate 18. When processing the four sides of the bottom cross beam 31 of the harvesting header main beam 3, the fixture assembly 2 is placed flat on the bottom support assembly 1, and the long support square tube 14 supports the front support 22, the middle support 212 and the tail support 216. When processing the top surface of the top vertical beam 32 of the harvesting header main beam 3, the shaft sleeve 232 and the shaft 16 remain in the same position, the shaft sleeve 232 rotates according to the center line position of the shaft 16, and the fixture assembly 2 flips accordingly. After flipping, the short support square tube 113 supports the front support 22, the middle support 212 and the tail support 216. Regardless of being laid flat or turned over, the bottom surface or side surface of the reinforcement frame 231 is in contact with the machine tool to support the fixture as a whole.

[0033] like Figure 1 , Figure 4 As shown, when the front end of the bottom cross beam 31 of the harvesting header main beam 3 is adjusted and positioned, the front end of the bottom cross beam 31 of the harvesting header main beam 3 is placed in the U-shaped groove of the front end support 22, and is locked by the locking nut 213 on the locking plate 27 and the long locking bolt 214 on the front end support 22 to achieve the fixing of the front end cover plate 28. The distance from the front end of the bottom cross beam 31 of the harvesting header main beam 3 to the front end support 22 is fixed by the limit screw 24, and the side positioning bolts 23 are provided on both sides of the front end support 22. The side positioning bolts 23 are used to adjust and position the front end of the bottom cross beam 31 of the harvesting header main beam 3, and the front end of the bottom cross beam 31 of the harvesting header main beam 3 is finely adjusted in height by the front end fine-tuning bolt 21. The positioning bolt 26 cooperates with the locking nut 213 on the front end cover plate 28 to achieve the positioning of the front end of the bottom cross beam 31 of the harvesting header main beam 3.

[0034] like Figure 1 , Figure 3 , Figure 4 As shown, when adjusting and positioning the middle and tail parts of the bottom cross beam 31 of the harvesting platform main beam 3, the bottom cross beam 31 of the harvesting platform main beam 3 is placed in the U-shaped groove of the middle support 212 and the tail support 216, and the adjustment method is the same as the adjustment method of the front end support 22.

[0035] The tail height of the bottom cross beam 31 of the harvesting platform main beam 3 is fine-tuned by the tail fine-tuning seat 110 and the tail fine-tuning bolt 111 on the bottom support assembly 1, the tail height of the bottom cross beam 31 of the harvesting platform main beam 3 is fine-tuned by rotating the tail fine-tuning bolt 111, and the tail height of the bottom cross beam 31 of the harvesting platform main beam 3 is positioned by the tail fixing group 229.

[0036] like Figure 4 , Figure 6 As shown, when positioning the top of the top vertical beam 32 of the harvesting header main beam 3, the cover support 217 is connected to the top cover 218 through the pin 25, and the top cover 218 is fixed by the top clamping bolt 223 and the top positioning plate 221. The bolt baffle 220 is welded to the lap beam 231-3 on the reinforcement frame 231, and two lock nuts are arranged up and down and welded to the bolt baffle 220. The top rotating bolt 222 cooperates with the lock nut, and the top clamping bolt 223 is welded to the top rotating bolt 222. The top rotating bolt 222 is rotated, and the top clamping bolt 223 loosens the bolt baffle 220 to realize the opening and closing of the top baffle 224. The top clamping plate 224 and the top positioning bolt 219 clamp and position the top two sides of the top vertical beam 32 of the harvesting header main beam 3.

[0037] like Figure 4 , Figure 5 , Figure 6 As shown, the connecting plate 223-1 and the triangular support 223-2 in the tail fixing group 223 are welded to the oblique beam 231-2 of the reinforcement frame 231, the locking nut 3 is welded at the center hole of the connecting plate 223-1, and one end of the pressing screw 223-3 passes through the U-shaped baffle 223-4 and is welded to the locking nut 4. The rotating pressing screw 223-3, the U-shaped baffle 223-4 and the middle partition 223-5 move with the movement of the locking nut 4, so as to realize the up and down movement of the contouring pressing plate 223-6, and press and position the round tube 33 of the main beam 3 of the harvesting header.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, when the jig assembly 2 is placed flat, the positioning plate 211, the lower positioning plate 112 and the locking bolts 228 cooperate to ensure that the jig assembly 2 is fixed on the bottom support assembly 1. After the jig assembly 2 is flipped over, the upper positioning plate 1 210, the upper positioning plate 227, the lower positioning plate 112 and the locking bolts 228 cooperate, and the locking bolts 228 are tightened to lock the upper positioning plate 1 210 and the upper positioning plate 227 on the lower positioning plate 112, ensuring that the jig assembly 2 is fixed on the bottom support assembly 1 after flipping.

Claims

1. A special machining fixture for a harvesting platform main beam, wherein the harvesting platform main beam (3) is composed of a bottom cross beam (31) and a top vertical beam (32), and is L-shaped as a whole, and a round tube (33) is provided at the connection between the bottom cross beam (31) and the top vertical beam (32); the characteristics are: The special machining fixture for the main beam of the harvesting platform comprises a bottom support component (1) and a fixture component (2); the bottom support component (1) is provided with a fixture component (2); the bottom support component (1) and the fixture component (2) are connected via a shaft sleeve (232) and a shaft (16); the main beam (3) of the harvesting platform is positioned in the fixture component (2); four side surfaces of the bottom cross beam (31) of the main beam (3) of the harvesting platform are machined; after the main beam (3) of the harvesting platform is turned over with the fixture component (2), a top surface of the top vertical beam (32) of the main beam (3) of the harvesting platform is machined; The bottom support assembly (1) comprises a long support square tube (14), a short support square tube (113), a bottom support plate (13), a base square tube (11) and a shaft (16); the two short support square tubes (113), the two long support square tubes (14) and the three base square tubes (11) are arranged parallel to each other and are perpendicular to the bottom support plate (13); the bottom support plate (13) is provided with a plurality of grooves at the upper and lower parts and a circular hole at the upper part; the bottom support plates (13) are multiple and arranged parallel to each other; the two short support square tubes (113), the two long support square tubes (14) and the three bases The square tubes (11) are respectively embedded in the grooves of the bottom support plate (13) and welded to the bottom support plate (13); the three base square tubes (11) are respectively embedded in the lower grooves of the bottom support plate (13), and the two short support square tubes (113) and the two long support square tubes (14) are respectively embedded in the upper grooves of the bottom support plate (13); the shaft (16) is embedded in the upper circular hole 1 of the bottom support plate (13), and the plurality of shaft sleeves (232) match the plurality of shafts (16); the outermost base square tube (11) is provided with a lower positioning plate (112), and a locking nut 1 (15) is provided on the lower positioning plate (112); The fixture assembly (2) comprises a front end support (22), a middle support (212), a rear end support (216), a reinforcement frame (231), a reinforcement square tube (230) and a shaft sleeve (232); the bottoms of the front end support (22), the middle support (212), the rear end support (216) and the reinforcement frame (231) are vertically welded to the reinforcement square tube (230) in sequence; the bottoms of the front end support (22), the middle support (212) and the rear end support (216) are each provided with two circular holes, which are respectively inserted and matched with the corresponding shaft sleeves (232); the upper part of the reinforcement frame (231) extends toward the rear end support ( The front end support (22), the middle support (212) and the tail support (216) are all provided with a U-shaped groove, the bottom cross beam (31) of the harvesting platform main beam (3) is placed in the U-shaped groove, a locking plate (27) is provided on the U-shaped groove, and the U-shaped groove is closed and locked in position by the locking plate (27); the upper part of the tail support (216) is provided with a cover plate support (217), the cover plate support (217) is provided with a U-shaped top cover plate (218), and the top vertical beam (32) of the harvesting platform main beam (3) is positioned in the U-shaped top cover plate (218).

2. A special machining fixture for the main beam of a harvesting header according to claim 1, characterized in that: The reinforcement frame (231) comprises a frame body (231-1), an inclined beam (231-2) and a lap beam (231-3); the frame body (231-1) is arranged perpendicular to the reinforcement square tube (230); one end of the top of the frame body (231-1) extends the lap beam (231-3) in a direction close to the tail support (216); the lap beam (231-3) is parallel to the reinforcement square tube (230); the lap beam (231-3) is welded to the top of the tail support (216); the other end of the top of the frame body (231-1) is connected to one end of the inclined beam (231-2); the other end of the inclined beam (231-2) is connected to the lap beam (231-3); the top of the frame body (231-1), the inclined beam (231-2) and the lap beam (231-3) form a right triangle.

3. The special machining fixture for the main beam of the harvesting header according to claim 2, characterized in that: The inclined beam (231-2) is provided with a tail fixing group (229), the tail fixing group (229) comprising a connecting plate (223-1), a pressing screw (223-3), a U-shaped baffle (223-4), a middle partition (223-5), a contoured pressing plate (223-6), a locking nut three (223-7) and a locking nut four (223-8), the connecting plate (223-1) is fixed on the inclined beam (231-2), the upper part of the pressing screw (223-3) is arranged on the connecting plate (223-1) through the locking nut three (223-7); the center of the U-shaped baffle (223-4) has The U-shaped baffle (223-4) and the middle partition (223-5) are welded, and a locking nut (223-8) is provided in the space between the U-shaped baffle (223-4) and the middle partition (223-5). The lower end of the compression screw (223-3) passes through the circular hole (3) in the center of the U-shaped baffle (223-4) and then the locking nut (223-8) is welded. A profiling pressure plate (223-6) is provided below the middle partition (223-5), and the bottom of the profiling pressure plate (223-6) is in an arc shape, which matches the shape of the round tube (33) at the connection between the bottom cross beam (31) and the top vertical beam (32).

4. The special machining fixture for the main beam of the harvesting header according to claim 3, characterized in that: A triangular support (223-2) is provided between the inclined beam (231-2) and the connecting plate (223-1).

5. The special machining fixture for the main beam of a harvesting header according to claim 2, characterized in that: The crossbeam (231-4) at the bottom of the frame body (231-1) is welded to the reinforced square tube (230).

6. A special machining fixture for the main beam of a harvesting header according to claim 1 or 2, characterized in that: The tail of the bottom support assembly (1) is provided with a tail fine-tuning seat (110), which is arranged on a fine-tuning positioning plate (19), and the fine-tuning positioning plate (19) is welded to the base square tube (11), and the tail fine-tuning seat (110) is provided with a tail fine-tuning bolt (111), which is fixed to the fine-tuning positioning plate (19) together with the tail fine-tuning seat (110).

7. A special machining fixture for the main beam of a harvesting header according to claim 1 or 2, characterized in that: A reinforcement base (12) is arranged between the two adjacent bottom square tubes (11), and two sides of the reinforcement base (12) are respectively welded to the adjacent base square tubes.

8. A special machining fixture for the main beam of a harvesting header according to claim 1 or 2, characterized in that: A shaft sleeve cover plate (17) is provided on the side of the shaft (16) to fix the shaft (16) in an upper circular hole of the bottom support plate (13); a support reinforcement plate (18) is also provided on the bottom square tube (11), and the shaft (16) passes through the support reinforcement plate (18), and the support reinforcement plate (18) supports and reinforces the shaft (16).

9. A method for processing a main beam of a harvesting header, characterized in that: The harvesting platform main beam is positioned, clamped and flipped using the special machining fixture described in any one of claims 1 to 8; the bottom support assembly (1) is connected to the fixture assembly (2) via a shaft sleeve (232) and a shaft (16), the harvesting platform main beam (3) is positioned in the fixture assembly (2), and the four side surfaces of the bottom cross beam (31) of the harvesting platform main beam (3) are processed; the fixture assembly (2) can be flipped on the bottom support assembly (1) via the shaft sleeve (232) and the shaft (16), and after the harvesting platform main beam (3) is flipped along with the fixture assembly (2), a top surface of the top vertical beam (32) of the harvesting platform main beam (3) is processed.

10. A method for processing a main beam of a harvesting header according to claim 9, characterized in that: The bottom cross beam (31) of the harvesting platform main beam (3) is placed in the U-shaped grooves of the front support (22), the middle support (212) and the tail support (216), and the U-shaped grooves are closed and locked in position by the locking plate (27); the top vertical beam (32) of the harvesting platform main beam (3) is positioned in the U-shaped top cover plate (218) at the top of the tail support (216); the contoured pressing plate (223-6) of the tail fixing group (229) is pressed against the round tube (33) to press the round tube (33) of the harvesting platform main beam (3) into position.

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