Fixture for machining agricultural machinery parts

Abstract

The invention relates to the technical field of agricultural machinery part machining, in particular to an agricultural machinery part machining clamp which is characterized in that a limiting mechanism is arranged on the upper side of a machining table, a throwing and bending mechanism is jointly arranged on the machining table and the limiting mechanism, and a leveling mechanism is arranged on the limiting mechanism; through cooperation of the limiting mechanism, the throwing and bending mechanism and the leveling mechanism, in the throwing and bending process of a clamped and locked rotary blade blank, the upper surface and the lower surface of the blade body can be attached and limited, and uneven deformation caused by insufficient material fluidity of the blade body in the rolling process is effectively restrained; the cutter body can be gradually rolled and formed along with the throwing and bending wheel, and the upper surface and the lower surface of the cutter body are secondarily pressed and leveled along the bending and stretching direction, so that the phenomenon of non-uniform distribution of a shearing sliding belt is obviously reduced; and active attaching and pressure applying on the upper side and the lower side of the outer side cutting edge can be achieved through the throwing and bending wheel, so that the outer side cutting edge is continuously attached to the throwing and bending wheel in a gapless mode in the forming process.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery parts processing, in particular to a clamp for processing agricultural machinery parts. Background Art

[0002] As the core working component of agricultural rotary tillers, the rotary blade is responsible for cutting and crushing soil, burying stubble and leveling the ground surface. In its manufacturing process, bending is an indispensable link. Bending is usually done through a high-temperature plastic deformation process to accurately process the straight blade body into a curved shape with a specific curvature. This curved blade body structure is the core guarantee for achieving its agronomic functions such as efficient soil penetration and smooth soil throwing.

[0003] In the prior art, during the bending process of the rotary tiller blade blank, the straight blade body heated at high temperature must first be inserted and clamped on the fixture of the bending machine, and the outer side of the end of the straight blade body must be automatically locked transitionally by the equipment. Then, the outer edge of the blade body is subjected to directional rolling by the bending wheel, and the blade body is extended and deformed under the action of controllable plastic deformation, and finally fits tightly on the outer contour of the preset arc-shaped mold, thereby bending the straight blade body into an arc-shaped blade body.

[0004] However, the traditional method of bending the straight blade body has the following problems: 1. In the existing technology, the bending machine fixture only realizes the basic clamping of the straight blade body by plugging in the end and locking it on the outside, but fails to impose effective constraints on the upper and lower surfaces of the blade body. When the blade body material softened at high temperature has insufficient fluidity or strain rate mismatch, the local compressive stress in the rolling process can easily induce unstable buckling of the metal surface, thereby forming microscopic wrinkle defects on the blade body; 2. In addition, due to the significant strain difference between the thick area of ​​the blade back and the thin area of ​​the blade, an uneven distribution of shear slip bands will be induced inside the material. When the inner side of the blade body is forced to fit the outer contour of the arc mold under the rolling pressure, the strain phenomenon will be further aggravated, thereby further causing the metal on the upper and lower surfaces of the blade body to undergo local buckling and form wrinkles. The wrinkle defects on the upper and lower surfaces of the blade body will not only destroy the integrity of the material surface, but also become a stress concentration weak area during processing and operation. At the same time, it will also cause the wear-resistant coating and the substrate bonding interface to have a tendency to peel off, affecting the overall service life of the rotary blade. Summary of the Invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a fixture for processing agricultural machinery accessories, comprising a processing table, a limiting mechanism is provided on the upper side of the processing table, a bending mechanism is provided on the processing table and the limiting mechanism, and a leveling mechanism is provided on the limiting mechanism.

[0006] The limiting mechanism includes a limiting support part arranged on the upper side of the processing table and used for limiting support and fitting and shaping the rotary tiller blade blank. The limiting support part is provided with a rotation adjustment part for adaptive intermittent rotation adjustment, and the upper side of the rotation adjustment part is provided with a clamping positioning part for clamping and locking the rotary tiller blade blank.

[0007] The bending mechanism includes a driving positioning part commonly provided on the processing table and the limiting support part, the driving positioning part is used to drive the rotation adjustment part to perform intermittent rotation adjustment, the driving positioning part is provided with a bending stretching part for bending the rotary tiller blade blank, and the driving positioning part and the bending stretching part are commonly provided with a bending pressing part for actively fitting the outer cutting edge of the rotary tiller blade blank.

[0008] The leveling mechanism includes a linked pressing part and a linked reset part which are arranged on the upper and lower sides of the limiting support part. The linked reset part is used for automatic rotation adjustment and reset. The linked reset part is provided with a driven leveling part which cooperates with the bending and pressing part to press and level the rotary tiller blade blank as a whole. The linked pressing part is used to cooperate with the bending and pressing part to gradually apply pressure to the driven leveling part.

[0009] Preferably, the limiting support part includes an L-shaped bracket symmetrically fixed on the upper side of the processing table, a fixed table is fixed between the L-shaped brackets, a bonding table is fixed on the upper side of the fixed table, a bottom support plate is fixed on the right front side of the bonding table, the bottom support plate consists of a lateral extension section on the front side and an arc-shaped section on the right side, and a positioning plate is fixed on the left side of the lateral extension section of the bottom support plate.

[0010] Preferably, the rotation adjustment part includes an articulated seat fixedly arranged on the lower side of the transverse extension section of the bottom support plate, the front side of the articulated seat is provided with an L-shaped plate through a left-right symmetrical support, and the lower side of the horizontal section of the L-shaped plate is provided with a driven wheel through a rotating shaft.

[0011] Preferably, the clamping and positioning portion includes a clamping block fixedly arranged on the upper side of the vertical section of the L-shaped plate, a limiting plate fixedly arranged on the upper side of the clamping block, and a wedge-shaped reinforcement plate fixedly arranged symmetrically on the front side of the limiting plate and the upper side of the clamping block.

[0012] Preferably, the driving positioning part includes a motor fixedly mounted on the processing table, the driving end of the motor is fixedly provided with a reducing cam located between the L-shaped brackets and pressed into engagement with the driven wheel, the upper side of the reducing cam is fixedly provided with a connecting shaft rotatably connected to the fixed table and the bonding table, the connecting shaft passes through the fixed table and the bonding table up and down, and the upper end of the connecting shaft is fixedly provided with a connecting table.

[0013] Preferably, the bending and stretching part includes a lower bending wheel which is arranged on the lower side of the front end of the connecting platform through the rotation of the second rotating shaft. The outer side of the upper end of the lower bending wheel is an arc surface. A sliding groove with an open upper end is provided inside the lower bending wheel, and a spring is fixed in the sliding groove.

[0014] Preferably, the bending and pressing part includes an upper bending wheel movably provided on the second rotating shaft and fixedly connected to the upper end of the spring. The upper bending wheel is composed of a sliding plate at the upper end and a sliding column at the lower end which is slidably connected to the sliding groove. The upper end of the sliding plate is an inclined surface, and the connection between the sliding plate and the sliding column is an arc surface. The arc surface in the middle of the upper bending wheel and the arc surface at the upper end of the lower bending wheel together form a U-shaped arc surface. A driving ring movably connected to the second rotating shaft is fixedly provided on the upper side of the upper bending wheel, and an annular buffer plate is fixedly provided on the outer side of the driving ring. The outer diameter of the annular buffer plate is smaller than the diameter of the upper bending wheel sliding column.

[0015] Preferably, the linkage reset portion includes two supports fixedly arranged obliquely and symmetrically on the upper side of the bonding platform, a linkage plate is arranged to rotate together between the two supports, and a counterweight block is fixedly arranged on one side of the linkage plate close to the middle of the bonding platform.

[0016] Preferably, the driven leveling part includes an arc-shaped leveling plate fixedly arranged on the side of the linkage plate away from the counterweight block. The arc-shaped leveling plate has the same cross-sectional shape as the bottom support plate. The front side, rear side and inner side of the arc-shaped leveling plate are all inclined surfaces. An arc-shaped docking plate is fixedly arranged on the outer side of the arc-shaped leveling plate. The lower side of the arc-shaped docking plate is an inclined surface that is press-fitted with the inclined surface of the upper end of the upper bending wheel.

[0017] Preferably, the linked pressing part includes a rotating plate which is rotatably arranged on the upper side of the bonding platform and above the arc-shaped smoothing plate through the third rotating shaft, a torsion spring located on the outer side of the third rotating shaft is fixedly arranged between the rotating plate and the bonding platform, a buffer pad which cooperates with the limit plate is fixedly arranged on the front side of the left end of the rotating plate, a rotating wheel is rotatably arranged on the front side of the right end of the rotating plate, and a pressing roller which extends left and right and cooperates with the arc-shaped smoothing plate for pressure is rotatably arranged on the lower side of the rotating plate through the third supporting support.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention cooperates with a limiting mechanism, a bending mechanism and a leveling mechanism. In the process of bending the clamped and locked rotary tiller blade blank, it can not only achieve the fitting and limiting of the upper and lower surfaces of the blade body to effectively suppress the uneven deformation of the blade body caused by insufficient material fluidity during the rolling process, but also can gradually roll the blade body following the bending wheel, and perform secondary compression and leveling on the upper and lower surfaces of the blade body along the bending and stretching direction, so that the metal flow in the thickness transition zone of the blade body is always under control, and significantly reduce the uneven distribution of the shear slip band.

[0020] 2. The present invention cooperates with the limiting mechanism, the bending mechanism and the leveling mechanism, and can also realize the active fitting and pressure application on the upper and lower sides of the outer cutting edge through the bending wheel, so that the outer cutting edge can continuously maintain a seamless fit with the bending wheel during the forming process, thereby completely eliminating the microscopic wrinkle defects caused by local buckling of the traditional bending processing cutter body, and ensuring the integrity of the cutter body and the stability of the coating on the cutter body surface, while significantly improving the surface flatness and service life of the rotary blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a partial structural diagram of the limiting mechanism.

[0023] Figure 3 It is a schematic diagram of the bending mechanism structure.

[0024] Figure 4 It is a partial cross-sectional diagram of the structure of the bending and stretching part.

[0025] Figure 5 It is a schematic diagram of the partial structure of the leveling mechanism.

[0026] Figure 6 It is a partial cross-sectional diagram of the leveling mechanism structure.

[0027] Figure 7 It is a partial structural diagram of the linked pressing part.

[0028] Figure 8 It is a schematic diagram of the change in the bending state of the rotary tillage blade blank.

[0029] In the figure: 1. Processing table; 2. Limiting mechanism; 21. Limiting support part; 211. L-shaped bracket; 212. Fixing table; 213. Laminating table; 214. Bottom support plate; 215. Positioning plate; 22. Rotation adjustment part; 221. Articulated seat; 222. L-shaped plate; 223. Driven wheel; 23. Clamping and positioning part; 231. Clamping block; 232. Limiting plate; 3. Bending mechanism; 31. Driving and positioning part; 311. Motor; 312. Variable diameter cam; 313. Connecting shaft; 314. Connecting table ; 32. Bending and stretching part; 321. Lower bending wheel; 322. Spring; 33. Bending and pressing part; 331. Upper bending wheel; 332. Driving ring; 333. Annular buffer plate; 4. Leveling mechanism; 41. Linking reset part; 411. Linking plate; 412. Counterweight; 42. Driven leveling part; 421. Arc-shaped leveling plate; 422. Arc-shaped docking plate; 43. Linking pressing part; 431. Rotating plate; 432. Torsion spring; 433. Buffer pad; 434. Rotating wheel; 435. Pressing roller. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1 A fixture for processing agricultural machinery parts includes a processing table 1, a limiting mechanism 2 is provided on the upper side of the processing table 1, a bending mechanism 3 is provided on the processing table 1 and the limiting mechanism 2, and a leveling mechanism 4 is provided on the limiting mechanism 2.

[0032] See also Figure 1 、 Figure 2 and Figure 8 The limiting mechanism 2 includes a limiting support part 21 arranged on the upper side of the processing table 1 and used for limiting support and fitting the shaping of the rotary tiller blade blank. The limiting support part 21 is provided with a rotation adjustment part 22 for adaptive intermittent rotation adjustment, and the upper side of the rotation adjustment part 22 is provided with a clamping positioning part 23 for clamping and locking the rotary tiller blade blank.

[0033] See also Figure 1 、 Figure 2 and Figure 3 The limiting support part 21 includes an L-shaped bracket 211 fixedly arranged on the upper side of the processing table 1 symmetrically on the left and right sides, and a fixed table 212 is fixedly arranged between the L-shaped brackets 211. A bonding table 213 is fixedly arranged on the upper side of the fixed table 212, and a bottom support plate 214 is fixedly arranged on the right front side of the bonding table 213. The bottom support plate 214 consists of a horizontal extension section on the front side and an arc section on the right side. A positioning plate 215 is fixedly arranged on the left side of the horizontal extension section of the bottom support plate 214.

[0034] See also Figure 1 、 Figure 3 and Figure 8 The rotation adjustment part 22 includes a hinge seat 221 fixedly arranged on the lower side of the horizontal extension section of the bottom support plate 214, and an L-shaped plate 222 is rotatably provided on the front side of the hinge seat 221 through a left-right symmetrical support, and a driven wheel 223 is rotatably provided on the lower side of the horizontal section of the L-shaped plate 222 through a rotating shaft.

[0035] See also Figure 1 、 Figure 3 and Figure 8 The clamping and positioning portion 23 includes a clamping block 231 fixedly arranged on the upper side of the vertical section of the L-shaped plate 222, a limiting plate 232 fixedly arranged on the upper side of the clamping block 231, and a wedge-shaped reinforcement plate fixedly arranged on the front side of the limiting plate 232 and the upper side of the clamping block 231 symmetrically on the left and right.

[0036] When the straight blank of the rotary tiller is to be clamped and locked, the left section of the straight blank is first manually placed on the upper side of the transverse extension section on the front side of the bottom support plate 214, and the left end face of the straight blank is fit with the right surface of the positioning plate 215, then the driven wheel 223 is rotated forward and lifted by the bending mechanism 3, and the driven wheel 223 then drives the upper end of the vertical section of the L-shaped plate 222 and the clamping block 231 to rotate and tilt backward, and the clamping block 231 then cooperates with the fitting platform 213 to stably clamp the left end of the straight blank, thereby stably clamping and locking the straight blank of the rotary tiller on the bottom support plate 214.

[0037] See also Figure 1 The bending mechanism 3 includes a driving positioning part 31 commonly provided on the processing table 1 and the limiting support part 21. The driving positioning part 31 is used to drive the rotation adjustment part 22 to perform intermittent rotation adjustment. The driving positioning part 31 is provided with a bending stretching part 32 for bending the rotary tiller blade blank. The driving positioning part 31 and the bending stretching part 32 are commonly provided with a bending pressing part 33 for actively fitting the outer edge of the rotary tiller blade blank.

[0038] See also Figure 1 、 Figure 3 and Figure 4 The driving positioning part 31 includes a motor 311 fixedly set on the processing table 1. The driving end of the motor 311 is fixedly provided with a reducing cam 312 located between the L-shaped brackets 211 and press-fitted with the driven wheel 223. The upper side of the reducing cam 312 is fixedly provided with a connecting shaft 313 rotatably connected to the fixed table 212 and the bonding table 213. The connecting shaft 313 passes through the fixed table 212 and the bonding table 213 up and down, and the upper end of the connecting shaft 313 is fixedly provided with a connecting table 314.

[0039] The motor 311 drives the variable diameter cam 312 to rotate in a directional manner (such as Figure 1 As shown by the middle arrow, the larger diameter section of the reducing cam 312 drives the clamping block 231 to stably clamp and lock the straight rotary blade blank by pressing the driven wheel 223 forward; when the smaller diameter section of the reducing cam 312 that rotates continuously in a direction contacts the driven wheel 223, the driven wheel 223 deflects backward and resets under the action of gravity, and the L-shaped plate 222 drives the clamping block 231 to deflect and reset forward, thereby automatically releasing the clamping lock on the rotary blade blank.

[0040] See also Figure 1 、 Figure 3 and Figure 4 The bending and stretching part 32 includes a lower bending wheel 321 which is arranged on the lower side of the front end of the connecting platform 314 and is rotated by the second rotating shaft. The outer side of the upper end of the lower bending wheel 321 is an arc surface, and a sliding groove with an upper end opening is provided inside the lower bending wheel 321, and a spring 322 is fixed in the sliding groove.

[0041] See also Figure 1 、 Figure 3 and Figure 4 The cam 331 is fixed on the second rotating shaft and fixedly connected to the upper end of the spring 322. The cam 331 is composed of a sliding plate at the upper end and a sliding column at the lower end which is slidably connected to the sliding groove. The upper end of the sliding plate is an inclined surface, and the connection between the sliding plate and the sliding column is an arc surface. The arc surface in the middle of the upper bending wheel 331 and the arc surface at the upper end of the lower bending wheel 321 together form a U-shaped arc surface. A driving ring 332 movably connected to the second rotating shaft is fixedly provided on the upper side of the upper bending wheel 331, and an annular buffer plate 333 is fixedly provided on the outer side of the driving ring 332. The outer diameter of the annular buffer plate 333 is smaller than the diameter of the sliding column of the upper bending wheel 331.

[0042] When the motor 311 drives the variable diameter cam 312 to rotate in a directional manner, the variable diameter cam 312 then drives the connecting platform 314 to rotate synchronously through the connecting shaft 313, and the connecting platform 314 then drives the lower bending wheel 321 and the upper bending wheel 331 to rotate synchronously around the connecting shaft 313 through the rotating shaft 2. Before the U-shaped arc surface formed by the lower bending wheel 321 and the upper bending wheel 331 contacts the front side of the straight blank, the variable diameter cam 312 has driven the clamping block 231 through the larger diameter section to stably clamp and lock the straight blank. After the U-shaped arc surface composed of the lower bending wheel 321 and the upper bending wheel 331 that rotate continuously in a directional manner cooperates with the outer arc surface of the fitting platform 213 to extend and shape the straight blank into an arc-shaped blank, the reducing cam 312 then passes through the smaller diameter section to release the clamping block 231 from clamping and locking the rotary blade bending blank. At this time, the formed rotary blade arc-shaped blank can be manually removed from the bottom support plate 214, and then the straight blank to be bent can be placed on the bottom support plate 214 for bending processing.

[0043] See also Figure 1 The leveling mechanism 4 includes a linked pressing portion 43 and a linked reset portion 41 arranged on the upper and lower sides of the limit support portion 21. The linked reset portion 41 is used for automatic rotation adjustment and reset. The linked reset portion 41 is provided with a driven leveling portion 42 that cooperates with the bending and pressing portion 33 to press and level the rotary blade blank as a whole. The linked pressing portion 43 is used to cooperate with the bending and pressing portion 33 to gradually apply pressure to the driven leveling portion 42.

[0044] See also Figure 1 and Figure 6 The linkage reset part 41 includes two supports that are fixedly arranged obliquely and symmetrically on the upper side of the bonding platform 213, and a linkage plate 411 is arranged to rotate together between the two supports. A counterweight block 412 is fixedly arranged on one side of the linkage plate 411 close to the middle of the bonding platform 213.

[0045] See also Figure 1 、 Figure 5 and Figure 6The driven leveling part 42 includes an arc-shaped leveling plate 421 fixedly arranged on the side of the linkage plate 411 away from the counterweight block 412. The arc-shaped leveling plate 421 has the same cross-sectional shape as the bottom supporting plate 214. The front side, rear side and inner side of the arc-shaped leveling plate 421 are all inclined surfaces. An arc-shaped docking plate 422 is fixedly arranged on the outer side of the arc-shaped leveling plate 421. The lower side of the arc-shaped docking plate 422 is an inclined surface that is pressed and matched with the inclined surface of the upper end of the upper bending wheel 331. The weight of the counterweight block 412 is slightly greater than the total weight of the arc-shaped leveling plate 421 and the arc-shaped docking plate 422.

[0046] When the curved screed plate 421 is subjected to downward pressure, the curved screed plate 421 drives the curved docking plate 422 to deflect and press downward synchronously around the support 2 until the curved screed plate 421 is no longer subjected to downward pressure. At this time, the counterweight block 412 can drive the front end of the linkage plate 411 to rotate slightly upward and lift around the support 2 through its own gravity, thereby driving the curved screed plate 421 and the curved docking plate 422 to deflect upward and reset.

[0047] See also Figure 1 、 Figure 5 、 Figure 6 and Figure 7 The linked pressing part 43 includes a rotating plate 431 which is rotatably arranged on the upper side of the bonding platform 213 and above the arc-shaped screed plate 421 through the third rotating shaft. A torsion spring 432 located on the outside of the third rotating shaft is fixedly arranged between the rotating plate 431 and the bonding platform 213. A buffer pad 433 which is buffered by the limit plate 232 is fixedly arranged on the front side of the left end of the rotating plate 431. A rotating wheel 434 is rotatably arranged on the front side of the right end of the rotating plate 431. A pressing roller 435 which extends left and right and is pressed by the arc-shaped screed plate 421 is rotatably arranged on the lower side of the rotating plate 431 through the third supporting support.

[0048] Before the directional and continuously rotating lower bending wheel 321 and upper bending wheel 331 contact the locked straight blank, the inclined surface at the upper end of the upper bending wheel 331 is then fitted with the inclined surface on the lower side of the arc-shaped docking plate 422. Before the U-shaped arc surface formed by the lower bending wheel 321 and the upper bending wheel 331 contacts and acts on the straight blank, the annular buffer sheet 333 on the outer side of the driving ring 332 is then fitted with the front side of the rotating plate 431 and drives it to rotate synchronously around the rotating axis. The rotating plate 431 then drives the pressing roller 435 to rotate synchronously, and the pressing roller 435 is then gradually moved downward from the inclined surface on the front side of the arc-shaped screed plate 421. The arc-shaped leveling plate 421 and the arc-shaped docking plate 422 are pressed, and the arc-shaped docking plate 422 then presses the upper bending wheel 331 downward through the lower inclined surface, and the upper bending wheel 331 then slides downward along the slide groove. As a result, when the U-shaped arc surface formed by the lower bending wheel 321 and the upper bending wheel 331 contacts and acts on the straight blank, the arc surface on the upper bending wheel 331 cooperates with the arc surface on the lower bending wheel 321 to stably fit and press on the outer edge of the straight blank, so that the outer edge can continue to maintain a gap-free fit with the upper bending wheel 331 and the lower bending wheel 321 during the forming process.

[0049] When the U-shaped arc surface formed by the lower bending wheel 321 and the upper bending wheel 331 is stably fitted on the outer edge of the straight blank and drives it to gradually extend and shape, the straight blank is gradually bent and fitted on the outer arc contour of the fitting platform 213, and gradually moves into between the bottom support plate 214 and the arc-shaped screed plate 421. The pressing roller 435 that follows the rotation of the lower bending wheel 321 and the upper bending wheel 331 presses the arc-shaped screed plate 421 downward step by step, so that the arc-shaped screed plate 421 cooperates with the bottom support plate 214 to gradually deform and bend the straight blank. The rotary tiller blade blank is stabilized and tightened and leveled for the second time until the lower bending wheel 321 and the upper bending wheel 331 are separated from the rotary tiller blade blank, and the upper end inclined surface of the upper bending wheel 331 is separated from the arc-shaped docking plate 422. Under the action of the spring 322, the upper bending wheel 331 slides upward and resets. At this time, the smaller diameter section of the reducing cam 312 contacts and cooperates with the driven wheel 223, and the clamping block 231 releases the clamping of the rotary tiller blade blank, so that the rotary tiller blade blank can be unloaded and clamped manually.

[0050] When the lower bending wheel 321 and the upper bending wheel 331 are separated from the rotary blade blank, the annular buffer sheet 333 contacts the rotating wheel 434 on the rotating plate 431 until the annular buffer sheet 333 that is continuously rotating in a direction is separated from the rotating wheel 434 and the rotating plate 431. The rotating plate 431 rotates forward around the rotating axis 3 under the action of the torsion spring 432 to reset. The inclined surfaces on the rear and inner sides of the arc-shaped screed plate 421 can ensure that the pressure roller 435 and the rotating plate 431 rotate stably and reset unhindered until the buffer pad 433 contacts the limit plate 232 on the upper side of the clamping block 231 with a buffer. Under the cooperation of the inclined surface on the front side of the arc-shaped screed plate 421 and the pressure roller 435, the rotating plate 431 quickly stops rotating and stops. At this time, the new rotary blade straight blank has been clamped, so that the rotary blade blank can be continuously bent, wherein the rotating wheel 434 can reduce the friction resistance of the annular buffer sheet 333 from separating from the rotating plate 431.

[0051] The above-mentioned operation method can not only realize the fitting and limiting of the upper and lower surfaces of the cutter body during the bending of the clamped and locked rotary tiller blade blank, so as to effectively suppress the uneven deformation of the cutter body caused by insufficient material fluidity during the rolling process, but also can progressively roll the cutter body following the bending wheel, and perform secondary pressing and leveling on the upper and lower surfaces of the cutter body along the bending and stretching direction, so that the metal flow in the thickness transition zone of the cutter body is always under control, significantly reducing the uneven distribution of the shear slip band, thereby completely eliminating the microscopic wrinkle defects caused by local buckling of the cutter body in traditional bending processing, and ensuring the integrity of the cutter body and the stability of the coating on the surface of the cutter body, while significantly improving the surface flatness and service life of the rotary tiller blade.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0054] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fixture for processing agricultural machinery parts, comprising a processing table, characterized in that: A limiting mechanism is provided on the upper side of the processing table, a bending mechanism is provided on the processing table and the limiting mechanism, and a leveling mechanism is provided on the limiting mechanism; The limiting mechanism includes a limiting support portion provided on the upper side of the processing table and used for limiting support and fitting the rotary tiller blade blank, a rotation adjustment portion for adaptive intermittent rotation adjustment is provided on the limiting support portion, and a clamping and positioning portion for clamping and locking the rotary tiller blade blank is provided on the upper side of the rotation adjustment portion; The bending mechanism includes a driving and positioning part commonly provided on the processing table and the limiting support part, the driving and positioning part is used to drive the rotation adjustment part to perform intermittent rotation adjustment, the driving and positioning part is provided with a bending and stretching part for bending the rotary tiller blade blank, and the driving and positioning part and the bending and stretching part are commonly provided with a bending and pressing part for actively fitting the outer edge of the rotary tiller blade blank; The leveling mechanism includes a linked pressing part and a linked reset part which are arranged on the upper and lower sides of the limiting support part. The linked reset part is used for automatic rotation adjustment and reset. The linked reset part is provided with a driven leveling part which cooperates with the bending and pressing part to press and level the rotary tiller blade blank as a whole. The linked pressing part is used to cooperate with the bending and pressing part to gradually apply pressure to the driven leveling part.

2. The clamp for processing agricultural machinery parts according to claim 1, characterized in that: The limiting support part includes an L-shaped bracket fixedly arranged on the upper side of the processing table symmetrically on the left and right, a fixed table is fixedly arranged between the L-shaped brackets, a bonding table is fixedly arranged on the upper side of the fixed table, a bottom support plate is fixedly arranged on the right front side of the bonding table, the bottom support plate is composed of a lateral extension section on the front side and an arc-shaped section on the right side, and a positioning plate is fixedly arranged on the left side of the lateral extension section of the bottom support plate.

3. The clamp for processing agricultural machinery parts according to claim 2, characterized in that: The rotation adjustment part includes an articulated seat fixedly arranged on the lower side of the transverse extension section of the bottom support plate, an L-shaped plate is rotatably arranged on the front side of the articulated seat through a left-right symmetrical support, and a driven wheel is rotatably arranged on the lower side of the horizontal section of the L-shaped plate through a rotating shaft.

4. The clamp for processing agricultural machinery parts according to claim 3, characterized in that: The clamping and positioning portion includes a clamping block fixedly arranged on the upper side of the vertical section of the L-shaped plate, a limiting plate fixedly arranged on the upper side of the clamping block, and a wedge-shaped reinforcement plate fixedly arranged symmetrically on the front side of the limiting plate and the upper side of the clamping block.

5. The fixture for processing agricultural machinery parts according to claim 3, characterized in that: The driving positioning part includes a motor fixedly arranged on the processing table, and the driving end of the motor is fixedly provided with a reducing cam located between the L-shaped brackets and pressed into engagement with the driven wheel. The upper side of the reducing cam is fixedly provided with a connecting shaft rotatably connected to the fixed table and the bonding table. The connecting shaft passes through the fixed table and the bonding table up and down, and the upper end of the connecting shaft is fixedly provided with a connecting table.

6. The fixture for processing agricultural machinery parts according to claim 5, characterized in that: The bending and stretching part includes a lower bending wheel which is arranged on the lower side of the front end of the connecting platform and is rotated by a second rotating shaft. The outer side of the upper end of the lower bending wheel is an arc surface. A sliding groove with an open upper end is provided inside the lower bending wheel, and a spring is fixed in the sliding groove.

7. The clamp for processing agricultural machinery parts according to claim 6, characterized in that: The bending and pressing part includes an upper bending wheel movably arranged on the second rotating shaft and fixedly connected to the upper end of the spring. The upper bending wheel is composed of a sliding plate at the upper end and a sliding column at the lower end which is slidably connected to the sliding groove. The upper end of the sliding plate is an inclined surface, and the connection between the sliding plate and the sliding column is an arc surface. The arc surface in the middle of the upper bending wheel and the arc surface at the upper end of the lower bending wheel together form a U-shaped arc surface. A driving ring movably connected to the second rotating shaft is fixedly provided on the upper side of the upper bending wheel, and an annular buffer plate is fixedly provided on the outer side of the driving ring. The outer diameter of the annular buffer plate is smaller than the diameter of the upper bending wheel sliding column.

8. The clamp for processing agricultural machinery parts according to claim 2, characterized in that: The linkage reset part includes two supports fixedly arranged in an oblique and symmetrical manner on the upper side of the bonding platform, a linkage plate is arranged to rotate together between the two supports, and a counterweight block is fixedly arranged on one side of the linkage plate close to the middle of the bonding platform.

9. The clamp for processing agricultural machinery parts according to claim 8, characterized in that: The driven leveling part includes an arc-shaped leveling plate fixedly arranged on the side of the linkage plate away from the counterweight block. The arc-shaped leveling plate has the same cross-sectional shape as the bottom supporting plate. The front side, rear side and inner side of the arc-shaped leveling plate are all inclined surfaces. An arc-shaped docking plate is fixedly arranged on the outer side of the arc-shaped leveling plate. The lower side of the arc-shaped docking plate is an inclined surface that is pressed into engagement with the inclined surface of the upper end of the upper bending wheel.

10. The clamp for processing agricultural machinery parts according to claim 9, characterized in that: The linked pressing part includes a rotating plate that is rotatably arranged on the upper side of the bonding platform and above the arc-shaped screed plate through a third rotating shaft, a torsion spring located on the outside of the third rotating shaft is fixedly arranged between the rotating plate and the bonding platform, a buffer pad that cooperates with the limit plate is fixedly arranged on the front side of the left end of the rotating plate, a rotating wheel is rotatably arranged on the front side of the right end of the rotating plate, and a pressing roller that extends left and right and cooperates with the arc-shaped screed plate for pressure is rotatably arranged on the lower side of the rotating plate through a third supporting support.

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