Rice transplanter main frame welding first-order tool and welding method thereof

Abstract

The invention relates to the technical field of rice transplanter welding, in particular to a rice transplanter main frame welding first-order tool and a welding method thereof.The rice transplanter main frame welding first-order tool comprises a base plate, a gas path system, a front end positioning assembly, a first pipe positioning assembly, a second pipe positioning assembly, a bent plate positioning assembly, a hole positioning assembly, a first four-hole plate positioning assembly and a second four-hole plate positioning assembly; the pipe positioning assembly I and the pipe positioning assembly II are used for positioning and clamping the two longitudinal beam welds; the hole positioning assembly is used for positioning and clamping the hole; the four-hole plate positioning assembly I and the four-hole plate positioning assembly II are used for positioning and clamping the two fixed seat welding parts which are arranged at intervals; the bent plate positioning assembly is used for positioning and clamping the front cross beam; the front end positioning assembly comprises a sliding table mechanism, and a limiting mechanism is arranged on the sliding table mechanism and used for fixing the position of the sliding table mechanism. The gas path system is used for controlling clamping of the positioning assemblies. Welding requirements of main frames of rice transplanters of different models are met, and generalization of main frame welding tools of rice transplanters of various models is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of rice transplanter welding, and in particular to a first-order tool for welding a main frame of a rice transplanter and a welding method thereof. Background Art

[0002] As an important machine in modern agriculture, the main frame welding of the rice transplanter is the foundation of the machine and bears the heavy responsibility of connecting almost all other parts of the rice transplanter. However, the existing main frame welding tooling is mostly simple structure, which requires manual auxiliary positioning of each part. It is not only difficult to ensure the precise positioning and clamping of the welded parts, affecting the welding quality, but also the operation process is cumbersome, time-consuming, labor-intensive and inefficient. Therefore, how to improve the positioning accuracy and welding efficiency of the main frame of the rice transplanter has become an urgent problem to be solved. Summary of the invention

[0003] In order to solve the above technical problems existing in the prior art, the present invention provides a first-order welding tool for a main frame of a rice transplanter and a welding method thereof.

[0004] The first aspect of the present invention is to provide a first-order welding tool for a main frame of a rice transplanter, comprising a base plate and an air circuit system, a front end positioning component, a pipe positioning component 1, a pipe positioning component 2, a bent plate positioning component, a hole positioning component, a four-hole plate positioning component 1 and a four-hole plate positioning component 2 arranged on the base plate; the pipe positioning component 1 and the pipe positioning component 2 are arranged opposite to each other, and are used to position and clamp the two longitudinal beams arranged at intervals on the main frame of the rice transplanter; the hole positioning component is used to position and clamp the holes on the main frame; the four-hole plate positioning component 1 and the four-hole plate positioning component 2 are arranged opposite to each other, and are used to position and clamp the two longitudinal beams arranged at intervals on the main frame of the rice transplanter; The fixed seat is welded for positioning and clamping; the bent plate positioning assembly is used to position and clamp the front cross beam, the differential connection seat and the gearbox fixing seat; the front end positioning assembly includes a slide mechanism that can move on the base plate, and the moving direction of the slide mechanism is orthogonal to the extension direction of the longitudinal beam welding. A limiting mechanism is arranged on the slide mechanism, and the limiting mechanism is used to fix the position of the slide mechanism; the air circuit system is connected to the tube positioning assembly 1, the tube positioning assembly 2, the four-hole plate positioning assembly 1, the four-hole plate positioning assembly 2, the front end positioning assembly and the bent plate positioning assembly, and is used to control the clamping of each positioning assembly.

[0005] On the basis of the above technical solution, the present invention can also make the following technical improvements:

[0006] Furthermore, the pipe positioning assembly 1 and the pipe positioning assembly 2 both include a clamping cylinder 1, a three-axis cylinder 1, a pressure plate 3 and a pipe clamping mechanism 1. The clamping cylinder 1, the three-axis cylinder 1 and the pressure plate 3 are all connected to the pipe clamping mechanism 1. The pipe clamping mechanism 1 includes a number of positioning blocks. The three-axis cylinder 1 controls the positioning of the several positioning blocks. The air circuit system controls the pressure plate 3. The pressure plate 3 and the clamping cylinder 1 control the pipe clamping mechanism 1 to clamp the longitudinal beam for welding.

[0007] Furthermore, the hole positioning assembly includes a through-hole positioning assembly and a single-hole plate positioning assembly. The through-hole positioning assembly is used to position the through-holes relatively arranged on the two longitudinal beams welded together and the through-holes relatively arranged on the two spaced-apart bent pipe fixing seats welded together. The single-hole plate positioning assembly is used to position the through-holes relatively arranged on the two fixing seats welded together.

[0008] Further, the through hole positioning assembly includes a left seat 1 and a right seat 1 that are relatively arranged, and a positioning rod 1, a positioning rod 2 and a positioning rod 3 for positioning through holes at different positions are arranged between the left seat 1 and the right seat 1, and the two ends of the positioning rod 1, the positioning rod 2 and the positioning rod 3 are respectively connected to the left seat 1 and the right seat 1 with pins at the two ends, and the middle positions of the positioning rods 1, the positioning rods 2 and the positioning rods 3 are all provided with intermediate sleeves, and the two ends are all provided with side sleeves, and the two ends of the positioning rods 1, the positioning rods 2 and the positioning rods 3 are respectively provided with pressure plates.

[0009] Furthermore, the single-hole plate positioning assembly includes a left seat 2 and a right seat 2 that are relatively arranged, a pin shaft is arranged between the left seat 2 and the right seat 2, an intermediate sleeve is sleeved at the middle position of the pin shaft, side sleeves are respectively sleeved at the two end positions of the pin shaft, and a pressure plate 1 is also arranged at the end of the pin shaft.

[0010] Further, the bent plate positioning assembly includes a positioning plate three, a positioning plate four and two oppositely arranged positioning plates two, the positioning plate three is provided with a threaded hole corresponding to the through hole on the front cross beam, the positioning plate four is provided with a threaded hole corresponding to the through hole on the differential connection seat, and the two positioning plates two are respectively provided with threaded holes corresponding to the through holes on the gearbox fixing seat; the bent plate positioning assembly also includes a threaded pin connected to each of the threaded holes and a clamping cylinder three, the clamping cylinder three is connected to the two positioning plates two, and the clamping cylinder three can rotate around the flip axis.

[0011] Furthermore, the four-hole plate positioning assembly 1 and the four-hole plate positioning assembly 2 each include a three-axis cylinder 2, a four-bar mechanism 1 connected to the two ends of the three-axis cylinder 2 respectively, and a positioning plate 1, a tensioning pin 1 is provided on the positioning plate 1, and the air circuit system is connected to the three-axis cylinder 2.

[0012] Furthermore, the front end positioning assembly also includes a positioning mechanism, which is used to position and clamp the rear cross beam weld and one end of the two longitudinal beam welds close to the rear cross beam weld.

[0013] Further, the positioning mechanism includes a right hole positioning member, a left hole positioning member, a right tube positioning member, a left tube positioning member and an intermediate positioning member, the right hole positioning member is used to position the position of the hole on the U-shaped plate 2 welded by the right longitudinal beam, the left hole positioning member is used to position the position of the hole on the U-shaped plate 1 welded by the left longitudinal beam, the right tube positioning member is used to position the end of the right longitudinal beam welded close to the end of the rear cross beam welded, the left tube positioning member is used to position the end of the left longitudinal beam welded close to the end of the rear cross beam welded, and the intermediate positioning member is used to position the through hole on the rear cross beam weld.

[0014] The second aspect of the present invention is to provide a method for welding a main frame of a rice transplanter using the above-mentioned main frame welding tool, comprising the following steps:

[0015] (1) Initialization preparation: operate the air system, loosen the pneumatic positioning and clamping mechanisms, and remove the movable positioning pins and positioning sleeves;

[0016] (2) Selective positioning adjustment: according to the model and size of the main frame of the rice transplanter to be welded, adjust the slide mechanism of the front-end positioning assembly and limit it through the limit mechanism;

[0017] (3) Positioning and clamping the main frame assembly: positioning and clamping the two longitudinal beams welded together and the through holes thereon, the two fixing seats welded together and the through holes thereon, the rear cross beam welded together and the through holes thereon, the two bent pipe fixing seats welded together and the through holes thereon, the front cross beam and the through holes thereon, and the two bent pipes of the main frame of the rice transplanter;

[0018] (4) Welding operation: welding each weld;

[0019] (5) Supplementary positioning and welding: positioning, clamping and welding the two pin fixing plates of the main frame of the rice transplanter, positioning, clamping and welding the differential connection seat, and positioning, clamping and welding the gearbox fixing seat;

[0020] (6) Post-weld processing: Loosen all pneumatic positioning and clamping mechanisms, and pull out all pins and sleeves;

[0021] (7) Lifting out the finished product: Use a hoist to lift the welded main frame out of the tooling, and then repair all the welds.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] The first-order welding tool for the main frame of the rice transplanter provided by the present invention can realize the positioning and clamping of the main frames of the rice transplanter of different models and sizes by arranging the front-end positioning component, thereby realizing the universalization of the welding tool and saving the production site and manufacturing cost; through the cooperation of the air circuit system, the front-end positioning component, the tube positioning component one, the tube positioning component two, the bent plate positioning component, the through-hole positioning component, the single-hole plate positioning component, the four-hole plate positioning component one and the four-hole plate positioning component two, the accurate positioning and clamping of each welded part on the main frame of the rice transplanter are guaranteed; through the control of multiple positioning components by the air circuit system, accurate and flexible positioning and taking and placing of parts are facilitated, and the production efficiency is improved; in the hole positioning component, a movable positioning through-shaft and a positioning sleeve structure are designed, which are convenient for accurately positioning the holes on both sides of the welded parts, ensuring the coaxiality, and facilitating the taking and placing of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the main frame of the rice transplanter of the present invention;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of a first-order tooling for welding the main frame of the rice transplanter of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the front-end positioning component;

[0027] Figure 4 It is a schematic diagram of the structure of the pipe positioning component 1 and the pipe positioning component 2;

[0028] Figure 5 It is a structural schematic diagram of a through-hole positioning component;

[0029] Figure 6 It is a structural schematic diagram of a single-hole plate positioning assembly;

[0030] Figure 7 It is a structural schematic diagram of a four-hole plate positioning component 1 and a four-hole plate positioning component 2;

[0031] Figure 8 It is a structural schematic diagram of the bending plate positioning assembly;

[0032] Fig. 9 is a structural schematic diagram of the right pipe positioning member;

[0033] Reference numerals:

[0034] 1. Substrate;

[0035] 2. Pipe positioning assembly 1; 11. L-shaped angle seat 1; 12. Support seat 1; 13. Clamping cylinder 1; 14. Three-axis cylinder 1; 27. Positioning block 1; 28. Positioning block 2; 29. ​​Positioning block 3; 30. Positioning block 4; 31. Press plate 3;

[0036] 3. Tube positioning component 2;

[0037] 4. Bending plate positioning assembly; 38. Clamping cylinder three; 40. Turning shaft; 44. Positioning plate two; 45. Threaded pin one; 46. Positioning plate three; 47. Threaded pin two; 48. Threaded pin three; 49. Positioning plate four; 52. Threaded pin five;

[0038] 5. Through hole positioning assembly; 57. Left seat 1; 58. Right seat 1; 75. Positioning rod 1; 72. Positioning rod 2; 66. Positioning rod 3; 69. Press plate 2; 70. Side sleeve 2;

[0039] 6. Single hole plate positioning assembly; 78. Left seat 2; 79. Right seat 2; 81. Side sleeve; 82. Middle sleeve; 83. Pin shaft; 80. Press plate 1;

[0040] 7. Four-hole plate positioning assembly one; 84. L-shaped angle seat two; 85. Fixed plate one; 86. Three-axis cylinder two; 88. Four-link mechanism one; 89. Transition plate one; 93. Positioning plate one; 92. Tension pin one;

[0041] 8. Four-hole plate positioning component 2;

[0042] 9. Front end positioning assembly; 94. Right hole positioning piece; 95. Interchangeable slide rail; 97. Base; 98. Limiting piece; 99. Middle positioning piece; 100. Left hole positioning piece; 101. Limiting sleeve; 102. Limiting pin; 103. Orifice plate mechanism; 104. Support plate; 105. Right tube positioning piece; 106. Left tube positioning piece; 111. Clamping cylinder 2; 120. Positioning block 5; 121. Positioning block 6; 122. Positioning block 7; 123. Positioning block 8; 118. Press plate 4; 117. Threaded pin 6; 107. Support seat 2; 131. Threaded pin 7; 132. Threaded pin 8; 133. Threaded pin 9;

[0043] 106. Left pipe positioning piece;

[0044] 10. Gas system;

[0045] 200, lower fixed seat welded; 201, rear cross beam welded; 202, right longitudinal beam welded; 203, left longitudinal beam welded; 204, fixed seat welded; 205, right fixed seat welded; 206, left fixed seat welded; 207, right elbow fixed seat welded; 208, left elbow fixed seat welded; 209, bent pipe; 210, front cross beam; 211, pin fixing plate; 212, gearbox fixing seat; 213, differential connection seat; 214, through hole one; 215, through hole two; 216, through hole three; 217, through hole four; 218, through hole five; 219, through hole six; 220, through hole seven; 221, through hole eight; 222, through hole nine; 223, U-shaped plate one; 224, U-shaped plate two. DETAILED DESCRIPTION

[0046] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0047] See also Figure 1 A rice transplanter main frame includes a right longitudinal beam weld 202 and a left longitudinal beam weld 203 which are arranged at intervals, and the right longitudinal beam weld 202 and the left longitudinal beam weld 203 are both square tubes, one end of the right longitudinal beam weld 202 and the left longitudinal beam weld 203 are connected through a rear crossbeam weld 201, and the other end is connected through a front crossbeam 210; the right longitudinal beam weld 202 and the left longitudinal beam weld 203 are respectively provided with a fixed seat weld 204, a right fixed seat weld 205 and a left fixed seat weld 206 which are arranged relatively in sequence, a bending pipe 209, a right bent pipe fixed seat weld 207 and a left bent pipe fixed seat weld 208, a pin shaft fixing plate 211, and a gearbox fixing seat 212; the right longitudinal beam weld 202 is also provided with a lower fixed seat weld 200 and a differential connecting seat 213.

[0048] See also Figure 2 A rice transplanter main frame welding first-order tooling according to an embodiment of the present invention comprises a base plate 1 and an air circuit system 10, a front end positioning component 9, a pipe positioning component 1 2, a pipe positioning component 2 3, a bent plate positioning component 4, a through-hole positioning component 5, a single-hole plate positioning component 6, a four-hole plate positioning component 1 7, and a four-hole plate positioning component 2 8. The pipe positioning component 1 2 and the pipe positioning component 2 3 are arranged opposite to each other and are respectively used to fix the right longitudinal beam weld 202 and the left longitudinal beam weld 203.

[0049] Among them, Figure 3As shown, the front end positioning assembly 9 includes a base 97, an interchangeable slide rail 95 and a stopper 98. The base 97 is slidably connected to the interchangeable slide rail 95 through an interchangeable slider. The base 97 is provided with a right hole positioning member 94, a left hole positioning member 100, a right tube positioning member 105, a left tube positioning member 106, an intermediate positioning member 99, a stopper sleeve 101, a stopper pin 102 and a support plate 104. The stopper sleeve 101 is fixed to the support plate 104. The stopper sleeve 101 is provided with a stopper pin 102. The supporting plate 104 can slide along the direction in which the interchangeable slide rail 95 extends. When welding different types of rice transplanter main frames, the supporting plate 104 is moved in two directions along the interchangeable slide rail 95. After moving into position, the limiting pin 102 is inserted into the through hole of the limiting sleeve 101 and the through hole of the orifice plate mechanism 103 to achieve limiting. The orifice plate mechanism 103 is fixedly arranged on the base plate 1 to achieve position fixing. The limiting member 98 is used to limit the position of the supporting plate 104 to prevent excessive movement. The orifice plate mechanism 103 has two groups, each group includes two, and the two orifice plate mechanisms 103 are relatively arranged on both sides of the front end positioning component 9, and the connection line thereof is perpendicular to the extension direction of the right longitudinal beam welding 202 and the left longitudinal beam welding 203. The positions of the two groups of orifice plate mechanisms 103 on the base plate 1 are adapted to the sizes of the main frames of different types of rice transplanters. This tooling can be applied to the welding production of main frames of various types of rice transplanters, and the sizes of the main frames of various types of rice transplanters are different, thereby realizing the universal production of the tooling; the left hole positioning member 100 is used to locate the position of the hole on the U-shaped plate 1 223 of the left longitudinal beam weld 203, the right hole positioning member 94 is used to locate the position of the hole on the U-shaped plate 224 of the right longitudinal beam weld 202, the right tube positioning member 105 is used to locate the end of the right longitudinal beam weld 202 and the position of the lower fixed seat weld 200 and the hole thereon, the left tube positioning member 106 is used to locate the end of the left longitudinal beam weld 203; the middle positioning member 99 is used to locate the two through holes 4 217 on the rear cross beam weld 201.

[0050] The left hole positioning member 100 includes a support plate three and a threaded hole opened thereon, and also includes a threaded pin seven 131. The U-shaped plate 223 of the left longitudinal beam welded 203 is pressed against the support plate three, and then the threaded pin seven 131 passes through the through hole on the U-shaped plate 223 and is screwed into the corresponding threaded hole, thereby realizing the positioning of the U-shaped plate 223 of the left longitudinal beam welded 203.

[0051] The structure of the right hole positioning member 94 and the mechanism of positioning the U-shaped plate 224 of the right longitudinal beam weld 202 are the same as those of the left hole positioning member 100, and will not be repeated here.

[0052] Similarly, the middle positioning member 99 is positioned by using threaded pin eight 132 and threaded pin nine 133 to position the two through holes four 217 on the rear cross beam weld 201.

[0053] like Fig. 9 As shown, the right pipe positioning member 105 includes a support seat 107, a pipe clamping mechanism 1, a clamping cylinder 111 and a pressure plate 118. The pipe clamping mechanism 1 includes a positioning block 120, a positioning block 121, a positioning block 122 and a positioning block 123 for realizing the end positioning of the right longitudinal beam weld 202. When the end of the right longitudinal beam weld 202 is in place, the positioning block 120, the positioning block 121, the positioning block 122 and the positioning block 123 are arranged around the right longitudinal beam weld 202. The positioning block 120 and the positioning block 121 are arranged on the support seat 107. The cylinder body of the clamping cylinder 111 is connected to the support seat 107, and the cylinder rod of the clamping cylinder 111 is hinged to the pressure plate 118. The positioning block seven 122 and the positioning block eight 123 are arranged on the pressing plate four 118. When the air circuit system 10 controls the cylinder rod of the clamping cylinder two 111 to move, the pressing plate four 118 can be driven to rotate in the clockwise direction, thereby driving the positioning block seven 122 and the positioning block eight 123 to move away from the positioning block five 120 and the positioning block six 121, thereby making room for positioning the end of the right longitudinal beam weld 202. Subsequently, the air circuit system 10 controls the cylinder rod of the clamping cylinder two 111 to move in the opposite direction, thereby driving the positioning block seven 122 and the positioning block eight 123 to return to their original positions, that is, the positioning block five 120, the positioning block six 121, the positioning block seven 122 and the positioning block eight 123 hold the end of the right longitudinal beam weld 202 tightly, thereby realizing the positioning and clamping of the end of the right longitudinal beam weld 202;

[0054] The structure of the left tube positioning member 106 and the positioning and clamping mechanism for the end of the left longitudinal beam weld 203 are the same as those of the above-mentioned right tube positioning member 105, and will not be repeated here.

[0055] A threaded hole is also provided on the pressure plate four 118, and the right tube positioning piece 105 also includes a threaded pin six 117 threadedly connected to the threaded hole. The threaded hole and the threaded pin six 117 are used to realize the positioning of the hole on the lower fixed seat weld 200. Specifically, the lower fixed seat weld 200 is abutted against the pressure plate four 118, and the through hole on the lower fixed seat weld 200 is aligned with the threaded hole on the pressure plate four 118, and then the threaded pin six 117 is manually passed through the through hole on the lower fixed seat weld 200 and screwed into the threaded hole, thereby realizing the positioning of the lower fixed seat weld 200 and the hole thereon.

[0056] like Figure 4As shown, the structure of the pipe positioning component 1-2 is the same as that of the pipe positioning component 2-3. The structure of the pipe positioning component 1-2 is used for explanation. The pipe positioning component 1-2 includes a connected L-shaped angle seat 11 and a support seat 12. The support seat 12 is provided with a clamping cylinder 13 and a three-axis cylinder 14. The support seat 12 is also provided with a pipe clamping mechanism 1 and a pressure plate 31. The pressure plate 31 and the clamping cylinder 13 are hinged. The pipe clamping mechanism 1 includes four positioning blocks, namely, a positioning block 1-27, a positioning block 2-28, a positioning block 3-29, and a positioning block 4-30. The positioning block 2-28 and the positioning block 4-30 are arranged on the pressure plate 3-31. The three-axis cylinder 14 controls the positioning of the pipe clamping mechanism 1. The clamping cylinder 13 and the pressure plate 3-31 are hinged with the clamping cylinder 13. The pipe clamping mechanism 1 includes four positioning blocks, namely, a positioning block 1-27, a positioning block 2-28, a positioning block 3-29, and a positioning block 4-30. The positioning block 2-28 and the positioning block 4-30 are arranged on the pressure plate 3-31. The three-axis cylinder 14 controls the positioning of the pipe clamping mechanism 1. Cylinder 13 controls the pipe clamping mechanism 1 to clamp the pipe; specifically, the three-axis cylinder 14 is controlled by the air circuit system 10 to drive the pipe clamping mechanism 1 to be positioned at the corresponding position of the right longitudinal beam weld 202, and then the air circuit system 10 controls the clamping cylinder 13 to move and drive the positioning block 2 28 and the positioning block 4 30 connected thereto to rotate away from the positioning block 1 27 and the positioning block 3 29, thereby making room between the positioning block 2 28 and the positioning block 4 30 and the positioning block 1 27 and the positioning block 3 29 to facilitate the right longitudinal beam weld 202 to pass through, and then the clamping cylinder 13 is controlled by the air circuit system 10 to move and drive the positioning block 2 28 and the positioning block 4 30 to be reset, thereby realizing the positioning and clamping of the right longitudinal beam weld 202.

[0057] The positioning and clamping process of the left longitudinal beam welding 203 using the tube positioning assembly 23 is the same as described above and will not be repeated here.

[0058] like Figure 5As shown, the through hole positioning assembly 5 includes a left seat 1 57 and a right seat 1 58 which are arranged opposite to each other, and a positioning rod 1 75, a positioning rod 2 72 and a positioning rod 3 66 are arranged between the left seat 1 57 and the right seat 1 58, and the two ends of the positioning rod 1 75, the positioning rod 2 72 and the positioning rod 3 66 are respectively connected with the left seat 1 57 and the right seat 1 58 by pins, and the middle positions of the positioning rod 1 75, the positioning rod 2 72 and the positioning rod 3 66 are all provided with an intermediate sleeve, and the two ends are all provided with side sleeves to realize the positioning of the through hole, and the ends of the positioning rod 1 75, the positioning rod 2 72 and the positioning rod 3 66 are also respectively provided with pressure plates for clamping the side sleeves at each end to ensure the stability and accuracy of the entire structure, and the positioning rod 2 72 is used as an example for explanation, and the positioning rod 1 75, the positioning rod 2 72 and the positioning rod 3 66 are respectively provided with pressure plates for clamping the side sleeves at each end to ensure the stability and accuracy of the entire structure, and the positioning rod 2 72 is used as an example for explanation, and the positioning rod 1 Both ends of the rod 2 72 are provided with a pressure plate 2 69 to clamp the side sleeve 2 70; the positioning rod 1 75 passes through the through hole 1 214 and the through hole 5 218 on the right longitudinal beam weld 202 and the left longitudinal beam weld 203 close to one end of the front cross beam 210 to achieve the positioning of the through hole 1 214 and the through hole 5 218, the positioning rod 2 72 passes through the through hole 6 219 on the right bend pipe fixing seat weld 207 and the through hole 7 220 on the left bend pipe fixing seat weld 208 to achieve the positioning of the through hole 6 219 and the through hole 7 220; the positioning rod 3 66 passes through the through hole 8 221 on the right bend pipe fixing seat weld 207 and the through hole 9 222 on the left bend pipe fixing seat weld 208 to achieve the positioning of the through hole 8 221 and the through hole 9 222.

[0059] like Figure 6 As shown, the single-hole plate positioning assembly 6 includes a left seat 2 78 and a right seat 2 79 that are arranged opposite to each other, a pin shaft 83 is arranged between the left seat 2 78 and the right seat 2 79, an intermediate sleeve 82 is sleeved at the middle position of the pin shaft 83, and side sleeves 81 are sleeved at the two end positions of the pin shaft 83, and a pressing plate 1 80 is also arranged at the end of the pin shaft 83. The pin shaft 83 is passed through the through hole 215 and the through hole 3 216 on the right fixed seat welding 205 and the left fixed seat welding 206, and is pressed by the pressing plate 1 80 to realize the positioning of the through hole 215 and the through hole 3 216; then the right fixed seat welding 205 and the left fixed seat welding 206 are positioned and clamped by the four-hole plate positioning assembly 1 7 and the four-hole plate positioning assembly 2 8, see for details. Figure 7, taking the four-hole plate positioning assembly 7 as an example, the four-hole plate positioning assembly 7 includes an L-shaped angle seat 2 84 and a fixing plate 1 85 connected to each other, the fixing plate 1 85 is provided with a three-axis cylinder 2 86, one end of the piston rod of the three-axis cylinder 2 86 is connected to a transition plate 1 89, the transition plate 1 89 is connected to a positioning plate 1 93, the positioning plate is also provided with a tension pin 1 92, the other end of the piston rod of the three-axis cylinder 2 86 is connected to the transition plate The four-bar linkage 88 linked with the positioning plate 93 is manually pushed, and the four-bar linkage 88 drives the positioning plate 93 to move toward the right fixed seat weld 205. After moving to the right position, the positioning plate 93 and the tension pin 92 fix the position of the right fixed seat weld 205, and then the air circuit system 10 is operated to drive the three-axis cylinder 86, so that the three-axis cylinder 86 controls the positioning plate 93 to clamp the right fixed seat weld 205. The positioning and clamping process of the four-hole plate positioning assembly 88 for the left fixed seat weld 206 is the same as that of the four-hole plate positioning assembly 7, which will not be repeated here.

[0060] See also Figure 8 The bent plate positioning assembly 4 includes a clamping cylinder 38, a positioning plate 3 46, a positioning plate 49 and two positioning plates 44 arranged opposite to each other, wherein the positioning plate 3 46 is provided with a threaded hole corresponding to the through hole on the front cross beam 210, the positioning plate 49 is provided with a threaded hole corresponding to the through hole on the differential connection seat 213, and the two positioning plates 44 are respectively provided with threaded holes corresponding to the through holes on the gearbox fixing seat 212; and further includes a threaded pin connected to each of the threaded holes, that is, a threaded pin 2 47 and a threaded pin 3 4 which are respectively threadedly connected to the two threaded holes on the positioning plate 3 46 to realize the positioning and clamping of the front cross beam 210. 8. A threaded pin five 52 is threadedly connected to the threaded holes on the positioning plate four 49 to achieve positioning and clamping of the differential connection seat 213. A threaded pin one 45 is threadedly connected to the threaded holes on the two positioning plates two 44 to achieve positioning and clamping of the gearbox fixing seat 212. The air circuit system 10 controls the clamping cylinder three 38 to achieve positioning and clamping of the positioning plates; the clamping cylinder three 38 is connected to the two positioning plates two 44, and the clamping cylinder three 38 can rotate around the flip axis 40. When the welding is completed, the threaded pins are removed, and the clamping cylinder three 38 drives the two positioning plates two 44 to rotate in the counterclockwise direction, thereby making room for lifting the main frame of the rice transplanter.

[0061] The specific operation process is to make the vertical plate of the front crossbeam 210 of the L-shaped structure abut against the positioning plate three 46, and then manually pass the threaded pins 247 and 248 through the through holes on the vertical plate of the front crossbeam 210 and then screw them into the corresponding threaded holes on the positioning plate three 46 to achieve the positioning and clamping of the front crossbeam 210; using the same operation, the two threaded pins 1 45 are passed through the through holes on the gearbox fixing seat 212 and then screwed into the corresponding threaded holes of the relatively arranged positioning plate two 44; finally, the threaded pin five 52 is passed through the through holes on the differential connection seat 213 and screwed into the corresponding threaded holes of the positioning plate four 49, that is, the front crossbeam 210, the gearbox fixing seat 212, and the differential connection seat 213 of the rice transplanter main frame are positioned and clamped; when all welding is completed, operate the air circuit system 10, and the clamping cylinder three 38 drives the two positioning plates two 44 to rotate, thereby making room for the main frame of the rice transplanter to be lifted out.

[0062] When the rice transplanter main frame welding first-order tool is used to weld the rice transplanter main frame, the specific steps are as follows:

[0063] (1) Initialization preparation: operate the air system 10, loosen all pneumatic positioning and clamping devices, and remove all movable positioning pins and positioning sleeves;

[0064] (2) Selective positioning adjustment: according to the model of the main frame of the rice transplanter to be welded, adjust the position of the support plate 104 in the front positioning assembly 9, and fix it with the limit pin 102 and the orifice plate mechanism 103;

[0065] (3) Positioning and clamping of the main frame assembly:

[0066] S1. Position the right longitudinal beam weld 202 and the left longitudinal beam weld 203 respectively through the tube positioning assembly 1 2 and the tube positioning assembly 2 3, further position the right longitudinal beam weld 202 and the left longitudinal beam weld 203 through the right tube positioning member 105 and the left tube positioning member 106 of the front end positioning assembly 9, and realize the positioning of the hole on the U-shaped plate 2 224 of the right longitudinal beam weld 202 through the right hole positioning member 94 of the front end positioning assembly 9;

[0067] S2, positioning the through hole 1 214 and the through hole 5 218 near one end of the front crossbeam 210 on the right longitudinal beam weld 202 and the left longitudinal beam weld 203 through the positioning rod 1 75 of the through hole positioning assembly 5 and its matching middle sleeve and side sleeve, and then pressing the two side sleeves through the pressure plate at the end of the positioning rod 1 75 to achieve positioning and clamping;

[0068] S3, positioning the hole on the U-shaped plate 223 of the left longitudinal beam welded 203 by the left hole positioning member 100 of the front end positioning assembly 9;

[0069] S4, operate the gas circuit system 10, control the clamping of the pressure plate 3 31 of the pipe positioning assembly 1 2 and the pipe positioning assembly 2 3, and control the right pipe positioning member 105 and the left pipe positioning member 106 of the front end positioning assembly 9 to achieve the clamping of the right longitudinal beam weld 202 and the left longitudinal beam weld 203;

[0070] S5, positioning the through hole 215 and the through hole 3 216 on the right fixed seat weld 205 and the left fixed seat weld 206 through the pin 83, the middle sleeve 82 and the side sleeve 81 of the single hole plate positioning assembly 6, and then clamping them through the pressing plate 1 80;

[0071] S6, manually push the four-bar linkage 88 of the four-hole plate positioning assembly 7 and the four-hole plate positioning assembly 28, and the two four-bar linkages 88 respectively drive the corresponding positioning plates 93 to move towards the right fixed seat weld 205 and the left fixed seat weld 206, and after moving into position, the two positioning plates 93 and the tension pin 92 respectively fix the positions of the right fixed seat weld 205 and the left fixed seat weld 206; then operate the air circuit system 10, and use air to clamp the three-axis cylinder 2 86, so as to achieve the clamping of the right fixed seat weld 205 and the left fixed seat weld 206;

[0072] S7, fix the two through holes 217 on the rear crossbeam weld 201 of the main frame of the rice transplanter through the middle piece positioning 99 of the front end positioning assembly 9, and then position the lower fixed seat weld 200 and the holes thereon through the right pipe positioning piece 105;

[0073] S8, positioning the through hole 6 219 on the right elbow fixing seat weld 207 and the through hole 7 220 on the left elbow fixing seat weld 208 through the positioning rod 2 72 and its matching middle sleeve and side sleeve of the through hole positioning assembly 5, positioning the through hole 8 221 on the right elbow fixing seat weld 207 and the through hole 9 222 on the left elbow fixing seat weld 208 through the positioning rod 3 66 and its matching middle sleeve and side sleeve, and then clamping the side sleeves at both ends of the positioning rod 2 72 and the positioning rod 3 66 respectively with their respective pressing plates;

[0074] S9, positioning the front cross beam 210 and the two holes thereon by using the positioning plate and the threaded pin of the bent plate positioning assembly 4;

[0075] S10, fix two bent pipes 209 by welding the four positioning blocks on the pipe positioning assembly 1 2 and the pipe positioning assembly 2 3 and the lower fixed seat 200, the left fixed seat 206, the right fixed seat 205, the left bent pipe fixed seat 208, and the right bent pipe fixed seat 207;

[0076] (4) Welding operation: welding each weld;

[0077] (5) Positioning and welding of other components:

[0078] P1. Remove the positioning rod 3 66 and the side sleeve and the middle sleeve of the through hole positioning assembly 5, and then fix the two pin fixing plates 211 with the positioning rod 3 66 and the matching side sleeve, the middle sleeve and the already welded left elbow fixing seat 208 and the right elbow fixing seat 207 of the through hole positioning assembly 5, and weld each weld;

[0079] P2. Use the positioning plate 49 and the threaded pin 45 of the bent plate positioning assembly 4 to fix the differential connection seat 213 and weld them;

[0080] P3, operate the gas circuit system 10, control the clamping cylinder 3 38 to rotate around the turning axis 40, thereby driving the two positioning plates 2 44 to rotate, use the positioning plates 2 44 and the threaded pin 1 45 to position the gearbox fixing seat 212, and then weld;

[0081] (6) Post-weld processing: Loosen all pneumatic positioning and clamping devices, and pull out all pins and sleeves;

[0082] (7) Lifting out the finished product: Use a hoist to lift the welded main frame out of the tooling, and then repair all the welds.

[0083] The first-order welding tool for the main frame of the rice transplanter provided by the present invention can realize the positioning and clamping of the main frames of the rice transplanter of different models and sizes by setting the front-end positioning component 9, thereby realizing the universalization of the welding tool and saving the production site and manufacturing cost; through the cooperation of the air circuit system 10, the front-end positioning component 9, the tube positioning component 1 2, the tube positioning component 2 3, the bent plate positioning component 4, the through-hole positioning component 5, the single-hole plate positioning component 6, the four-hole plate positioning component 1 7 and the four-hole plate positioning component 2 8, the accurate positioning and clamping of each welded part on the main frame of the rice transplanter is guaranteed; through the control of multiple positioning components by the air circuit system 10, accurate and flexible positioning and taking and placing of parts are facilitated, and the production efficiency is improved; in the hole positioning component, a movable positioning through-shaft and a positioning sleeve structure are designed, which is convenient for accurately positioning the holes on both sides of the welded parts, ensuring coaxiality, and facilitating the taking and placing of parts.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding tool for the main frame of a rice transplanter, characterized in that: The invention comprises a base plate (1) and an air circuit system (10) arranged on the base plate (1), a front end positioning component (9), a pipe positioning component 1 (2), a pipe positioning component 2 (3), a bent plate positioning component (4), a hole positioning component, a four-hole plate positioning component 1 (7) and a four-hole plate positioning component 2 (8); the pipe positioning component 1 (2) and the pipe positioning component 2 (3) are arranged relative to each other and are used to position and clamp two longitudinal beams welded at intervals on the main frame of the rice transplanter; the hole positioning component is used to position and clamp the holes on the main frame; the four-hole plate positioning component 1 (7) and the four-hole plate positioning component 2 (8) are arranged relative to each other and are used to position and clamp two fixed seats welded at intervals; the bent plate positioning component 1 (7) and the four-hole plate positioning component 2 (8) are arranged relative to each other and are used to position and clamp two fixed seats welded at intervals; The plate positioning assembly (4) is used for positioning and clamping the front cross beam (210), the differential connection seat (213) and the gearbox fixing seat (212); the front end positioning assembly (9) comprises a slide mechanism that can move on the base plate (1), the moving direction of the slide mechanism is orthogonal to the extension direction of the longitudinal beam welding, and a limit mechanism is arranged on the slide mechanism, and the limit mechanism is used for fixing the position of the slide mechanism; the air circuit system (10) is connected with the tube positioning assembly 1 (2), the tube positioning assembly 2 (3), the four-hole plate positioning assembly 1 (7), the four-hole plate positioning assembly 2 (8), the front end positioning assembly (9), and the bent plate positioning assembly (4), and is used for controlling the clamping of each positioning assembly.

2. The first-order welding tool for the main frame of the rice transplanter according to claim 1, characterized in that: The pipe positioning assembly 1 (2) and the pipe positioning assembly 2 (3) both include a clamping cylinder 1 (13), a three-axis cylinder 1 (14), a pressure plate 3 (31) and a pipe clamping mechanism 1; the clamping cylinder 1 (13), the three-axis cylinder 1 (14) and the pressure plate 3 (31) are all connected to the pipe clamping mechanism 1; the pipe clamping mechanism 1 includes a plurality of positioning blocks; the three-axis cylinder 1 (14) controls the positioning of the plurality of positioning blocks; the air circuit system (10) controls the pressure plate 3 (31); the pressure plate 3 (31) and the clamping cylinder 1 (13) control the pipe clamping mechanism 1 to clamp the longitudinal beam for welding.

3. The first-order welding tool for the main frame of the rice transplanter according to claim 1, characterized in that: The hole positioning assembly comprises a through hole positioning assembly (5) and a single hole plate positioning assembly (6); the through hole positioning assembly (5) is used to position through holes arranged opposite to each other on two longitudinal beams welded together and through holes arranged opposite to each other on two elbow fixing seats welded together and spaced apart; the single hole plate positioning assembly (6) is used to position through holes arranged opposite to each other on two fixing seats welded together.

4. The first-order welding tool for the main frame of the rice transplanter according to claim 3, characterized in that: The through hole positioning assembly (5) comprises a left seat one (57) and a right seat one (58) which are arranged opposite to each other. A positioning rod one (75), a positioning rod two (72) and a positioning rod three (66) for positioning through holes at different positions are arranged between the left seat one (57) and the right seat one (58). The two ends of the positioning rod one (75), the positioning rod two (72) and the positioning rod three (66) are respectively connected to the left seat one (57) and the right seat one (58) by pins. The middle positions of the positioning rod one (75), the positioning rod two (72) and the positioning rod three (66) are all provided with intermediate sleeves, and the two ends are all provided with side sleeves. The two ends of the positioning rod one (75), the positioning rod two (72) and the positioning rod three (66) are respectively provided with pressure plates.

5. The first-order welding tool for the main frame of the rice transplanter according to claim 3, characterized in that: The single-hole plate positioning assembly (6) comprises a left seat 2 (78) and a right seat 2 (79) which are arranged opposite to each other, a pin shaft (83) is arranged between the left seat 2 (78) and the right seat 2 (79), an intermediate sleeve (82) is sleeved at the middle position of the pin shaft (83), side sleeves (81) are sleeved at the two end positions of the pin shaft (83), and a pressure plate 1 (80) is also arranged at the end of the pin shaft 83.

6. The first-order welding tool for the main frame of the rice transplanter according to claim 1, characterized in that: The bent plate positioning assembly (4) comprises a positioning plate three (46), a positioning plate four (49) and two positioning plates two (44) arranged opposite to each other, the positioning plate three (46) is provided with a threaded hole corresponding to the through hole on the front cross beam (210), the positioning plate four (49) is provided with a threaded hole corresponding to the through hole on the differential connection seat (213), and the two positioning plates two (44) are respectively provided with threaded holes corresponding to the through holes on the gearbox fixing seat (212); the bent plate positioning assembly (4) also comprises a threaded pin connected to each of the threaded holes and a clamping cylinder three (38), the clamping cylinder three (38) is connected to the two positioning plates two (44), and the clamping cylinder three (38) can rotate around a flip axis (40).

7. The first-order welding tool for the main frame of the rice transplanter according to claim 1, characterized in that: The four-hole plate positioning assembly 1 (7) and the four-hole plate positioning assembly 2 (8) both include a three-axis cylinder 2 (86), a four-link mechanism 1 (88) respectively connected to the two ends of the three-axis cylinder 2 (86), and a positioning plate 1 (93), wherein a tension pin 1 (92) is provided on the positioning plate 1 (93), and the air circuit system (10) is connected to the three-axis cylinder 2 (86).

8. The first-order welding tool for the main frame of the rice transplanter according to claim 1, characterized in that: The front end positioning assembly (9) further comprises a positioning mechanism, and the positioning mechanism is used to position and clamp the rear cross beam weld (201) and one end of the two longitudinal beam welds close to the rear cross beam weld (201).

9. The first-order welding tool for the main frame of the rice transplanter according to claim 8, characterized in that: The positioning mechanism comprises a right hole positioning member (94), a left hole positioning member (100), a right tube positioning member (105), a left tube positioning member (106) and an intermediate positioning member (99); the right hole positioning member (94) is used to position the hole on the U-shaped plate 2 (224) of the right longitudinal beam weld (202); the left hole positioning member (100) is used to position the hole on the U-shaped plate 1 (223) of the left longitudinal beam weld (203); the right tube positioning member (105) is used to position the end of the right longitudinal beam weld (202) close to one end of the rear cross beam weld (201); the left tube positioning member (106) is used to position the end of the left longitudinal beam weld (203) close to one end of the rear cross beam weld (201); and the intermediate positioning member (99) is used to position the through hole on the rear cross beam weld (201).

10. A method for welding a main frame of a rice transplanter using the first-order welding tool for the main frame of a rice transplanter according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) Initialization preparation: operate the air system (10), loosen each pneumatic positioning and clamping mechanism, and remove each movable positioning pin and positioning sleeve; (2) Selective positioning adjustment: according to the model and size of the main frame of the rice transplanter to be welded, the slide mechanism of the front end positioning assembly (9) is adjusted and limited by the limit mechanism; (3) Positioning and clamping the main frame assembly: positioning and clamping the two longitudinal beams welded together and the through holes thereon, the two fixing seats welded together and the through holes thereon, the rear cross beam welded together (201) and the through holes thereon, the two bent pipe fixing seats welded together and the through holes thereon, the front cross beam (210) and the through holes thereon, and the two bent pipes (209) of the main frame of the rice transplanter; (4) Welding operation: welding each weld; (5) Supplementary positioning and welding: positioning, clamping and welding the two pin fixing plates (211) of the main frame of the rice transplanter, positioning, clamping and welding the differential connection seat (213), and positioning, clamping and welding the gearbox fixing seat (212); (6) Post-weld processing: Loosen all pneumatic positioning and clamping mechanisms, and pull out all pins and sleeves; (7) Lifting out the finished product: Use a hoist to lift the welded main frame out of the tooling, and then repair all the welds.

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