CN113680876A - Nine-rod reinforcement type servo hot stamping press with non-circular gear - Google Patents
Nine-rod reinforcement type servo hot stamping press with non-circular gear Download PDFInfo
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- CN113680876A CN113680876A CN202110925530.7A CN202110925530A CN113680876A CN 113680876 A CN113680876 A CN 113680876A CN 202110925530 A CN202110925530 A CN 202110925530A CN 113680876 A CN113680876 A CN 113680876A
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims description 15
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 6
- 239000003638 chemical reducing agent Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/15—Correlation function computation including computation of convolution operations
Abstract
The invention discloses a nine-rod reinforcement type servo hot stamping press with a non-circular gear, which is characterized by comprising a symmetrical non-circular gear pair mechanism, a crank slide block mechanism and a symmetrical toggle rod mechanism; the non-circular gear pair mechanism comprises a driving non-circular gear and a driven non-circular gear; a plurality of servo motors driven in parallel drive a driving non-circular gear shaft to rotate at a constant speed through a speed reducer, and the driving non-circular gear drives a driven non-circular gear to rotate at a constant speed; the driven non-circular gear drives the crank shaft to rotate at a non-uniform speed to push the first sliding block to move up and down; the crank slider mechanism drives the toggle rod mechanism to move; the toggle rod mechanism drives the stamping slide block to realize specific up-and-down variable speed movement. In the stamping process, the working section low-speed reinforcement, the idle stroke section rapid force reduction, the small stroke variable speed reinforcement and the force reduction are combined and linked, the mechanical benefit of a transmission system of the press is further increased, the motor capacity is reduced, better slide block kinematics and dynamic characteristics can be obtained, and the stamping machine is compact in structure, high in rigidity and strength, large in bearing capacity and high in reliability.
Description
Technical Field
The invention belongs to the field of stamping machinery, and particularly relates to a nine-rod reinforcement type servo hot stamping press with a non-circular gear.
Background
The hot stamping process generally requires the slider to be fast in the downstream stage to reduce the temperature loss caused by the heat exchange between the sheet and the die and air; the speed change can be realized in the slide block stamping stage, and the sheet metal is prevented from being pulled and cracked due to a softening mechanism in the sheet metal forming process; the torque of the transmission mechanism is further increased in the pressure maintaining process, so that the plate is always in good contact with the die, and the quenching effect is achieved. The servo motor is output with constant torque within the rated rotating speed, and is output with constant power after the rated rotating speed is exceeded, and the torque is reduced along with the increase of the rotating speed. In a traditional servo press transmission system, such as a typical six-rod mechanism servo press adopting lead screw and toggle rod combined transmission, a motor can only realize rated torque output within rated rotation speed (constant speed or variable speed), and the requirement of slider speed change and mechanism mechanical benefit further increase cannot be met after mechanism parameters are determined.
Disclosure of Invention
The invention aims to provide a nine-rod reinforcement type servo hot stamping press with a non-circular gear, wherein the mechanical benefit of a transmission system of the press is further increased, the motor capacity is reduced, better sliding block kinematics and dynamic characteristics can be obtained, and the press is compact in structure, high in rigidity and strength, large in bearing capacity and high in reliability.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a nine-bar force-enhancing servo hot stamping press with non-circular gears, comprising: the transmission is arranged at the top of the frame, the input end of the transmission is connected with the power device, the output end of the transmission is connected with a driving bevel gear, the frame below the driving bevel gear is provided with a horizontally arranged non-circular driving shaft, two ends of the non-circular driving shaft are symmetrically provided with non-circular driving gears, the middle part of the non-circular driving shaft is provided with a driven bevel gear, the driving bevel gear is meshed with the driven bevel gear, a non-circular driven shaft is arranged below the non-circular driving shaft, the non-circular driven shaft is provided with a non-circular driven gear at a position corresponding to the non-circular driving gear, the non-circular driving gear is meshed with the non-circular driven gear, the middle part of the non-circular driven shaft is provided with an eccentric shaft, the eccentric shaft is sleeved with a connecting rod, and the tail end of the connecting rod is connected with a slide block, the automatic stamping die is characterized in that toggle rod mechanisms are symmetrically arranged at the bottom of the sliding block and hinged to the sliding seat, an upper die is arranged at the bottom of the sliding seat, a lower die is arranged below the upper die and arranged on the surface of the base, and a workpiece is placed on the surface of the lower die.
The invention relates to a nine-rod reinforcement type servo hot stamping press with a non-circular gear, wherein a toggle rod mechanism comprises a driving rod, a lower toggle rod and an upper toggle rod, the upper part of the driving rod is hinged with a sliding block, the lower part of the lower toggle rod is hinged with a sliding seat, the upper part of the upper toggle rod is hinged with the inner side of a frame, and the free ends of the driving rod, the lower toggle rod and the upper toggle rod are hinged together.
The nine-rod reinforcement type servo hot stamping press with the non-circular gear comprises a frame, balance cylinders are symmetrically arranged on two sides of the frame, the output ends of the balance cylinders are connected with pull rods, the tail ends of the pull rods are provided with support plates which are vertically connected, and the support plates are connected with a sliding seat.
The nine-rod reinforcement type servo hot stamping press with the non-circular gears is characterized in that the number of the power devices is three, the gear box is provided with a speed change gear wheel, three speed change pinions are uniformly meshed with the speed change gear wheel in the circumferential direction, and each speed change pinion is connected with one power device.
The invention relates to a nine-rod reinforcement type servo hot stamping press with a non-circular gear, wherein the transmission ratio function i of the non-circular driving gear and a non-circular driven gear12Comprises the following steps:
wherein: the rotation angle of the non-circular driving gear is
When the pitch curve has radial direction r1(ii) a The rotation angle of the non-circular driven gear is
The radial direction of the corresponding pitch curve is r2。
The invention relates to a nine-rod reinforcement type servo hot stamping press with a non-circular gear, wherein a pitch curve equation of the non-circular driving gear and the non-circular driven gear is as follows:
wherein: a is the center distance between the non-circular driving gear and the non-circular driven gear.
According to the nine-rod reinforcement type servo hot stamping press with the non-circular gear, the pitch curve of the non-circular driving gear and the non-circular driven gear is obtained through reverse calculation of the kinematic curve of the sliding seat; the pitch curve of the non-circular driving gear and the non-circular driven gear is formed by fitting a plurality of sections of free curves through the kinematic curve of the sliding seat; the kinematic curve of the slide is determined by a variable speed stamping process curve.
The invention relates to a nine-rod reinforcement type servo hot stamping press with a non-circular gear, wherein the force output by a sliding seat is FMAXWith common torque M on two sets of non-circular driven gears1The relationship is as follows:
wherein, alpha, lambda and gamma are angle parameters related to mechanism parameters, when alpha, lambda and gamma are all 15 DEG, l8About 500mm, FMAX≈48M1≡48×F1×r2In which F is1The force of the non-circular driven gear at the radial tooth profile is the same as the force of the non-circular driven gear at the radial tooth profile. When the non-circular gear follows the wheel pitch curve to the radial direction r2≈400～600mm；
FMAX≈(19.2～28.8)F1。
The invention relates to a nine-rod reinforcement type servo hot stamping press with non-circular gears, wherein a common torque M on two groups of non-circular driving gears (7)0And M1The relationship is as follows:
The invention has the following beneficial effects: the invention provides a nine-rod reinforcement type servo hot stamping press with a non-circular gear, which is characterized in that compared with a typical six-rod mechanism which is usually driven by a lead screw and a toggle rod mechanism in a traditional servo press transmission system, a motor can only realize rated torque output within rated rotating speed (uniform speed or variable speed), and the defect that reinforcement cannot be further realized after mechanism parameters are determined is overcome, the nine-rod reinforcement type servo hot stamping press which is driven by three mechanisms of the non-circular gear, a crank slide block and the toggle rod mechanism is provided, not only can the pitch curve and the tooth profile of a driving non-circular gear and a driven non-circular gear be reversely designed, and a continuous and precise variable speed hot stamping process is realized, but also the requirements of low-speed reinforcement of a working section, quick force reduction of an idle stroke section, small-stroke variable speed reinforcement and force reduction mixed linkage in the stamping process can be realized, and the forming and forming requirements of a plate blank in the hot stamping process can be also met, the reliability of the servo hot stamping press is further improved, and the defect that the movement of a screw rod and a toggle rod in a traditional servo press transmission system needs frequent forward and reverse rotation of a motor is overcome.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of an upper mold at top dead center in accordance with an embodiment of the present invention;
FIG. 3 is a top view of a transmission according to an embodiment of the present invention;
FIG. 4 is a diagrammatic view of a drive mechanism of an embodiment of the present invention;
FIG. 5 is a schematic drawing of a press curve of a proposed configuration of an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
1-5, a nine-bar force-enhancing servo hot stamping press with non-circular gears, comprising: the transmission device comprises a frame 1, a power device 2 and a transmission case 3, wherein the transmission case 3 is arranged at the top of the frame 1, the input end of the transmission case 3 is connected with the power device 2, the output end of the transmission case 3 is connected with a driving bevel gear 4, the frame 1 below the driving bevel gear 4 is provided with a non-circular gear driving shaft 5 which is horizontally arranged, two ends of the non-circular gear driving shaft 5 are symmetrically provided with non-circular driving gears 7, the middle part of the non-circular gear driving shaft 5 is provided with a driven bevel gear 6, the driving bevel gear 4 is meshed with the driven bevel gear 6, a non-circular gear driven shaft 8 is arranged below the non-circular gear driving shaft 5, a non-circular driven gear 9 is arranged on the non-circular gear driven shaft 8 corresponding to the non-circular driving gear 7, the non-circular driving gear 7 is meshed with the non-circular driven gear 9, and the middle part of the non-circular gear driven shaft 8 is provided with an eccentric shaft 10, the eccentric shaft 10 is sleeved with a connecting rod 11, the tail end of the connecting rod 11 is connected with a sliding block 12, toggle rod mechanisms are symmetrically arranged at the bottom of the sliding block 12 and hinged to a sliding seat 15, an upper die 17 is arranged at the bottom of the sliding seat 15, a lower die 19 is arranged below the upper die 17, the lower die 19 is arranged on the surface of a base 20, and the surface of the lower die 19 is used for placing a workpiece 18.
In the preferred embodiment of the present invention, the toggle link mechanism comprises a driving rod 13, a lower toggle link 14 and an upper toggle link 15, wherein the upper part of the driving rod 13 is hinged with the slide block 12, the lower part of the lower toggle link 14 is hinged with the slide carriage 15, the upper part of the upper toggle link 15 is hinged with the inner side of the frame 1, and the free ends of the driving rod 13, the lower toggle link 14 and the upper toggle link 15 are hinged together.
In a preferred embodiment of the present invention, balancing cylinders 21 are symmetrically arranged on both sides of the frame 1, an output end of the balancing cylinder 21 is connected with a pull rod 22, a support plate 23 vertically connected is arranged at a tail end of the pull rod 22, and the support plate 23 is connected with the slide carriage 15.
In a preferred embodiment of the present invention, the number of the power devices 2 is three, the transmission 3 has a gear change gearwheel 301, the gear change gearwheel 301 is circumferentially and uniformly engaged with three gear change pinions 302, and each gear change pinion 302 is connected with one power device 2.
In the preferred embodiment of the present invention, the transmission ratio function i of the non-circular driving gear 7 and the non-circular driven gear 912Comprises the following steps:
wherein: the rotation angle of the non-circular driving gear 7 is
When the pitch curve has radial direction r1(ii) a The non-circular driven gear 9 has a rotation angle of
The radial direction of the corresponding pitch curve is r2。
In a preferred embodiment of the present invention, the pitch curve equation of the non-circular driving gear 7 and the non-circular driven gear 9 is:
wherein: a is the center distance between the non-circular driving gear 7 and the non-circular driven gear 9.
In the preferred embodiment of the present invention, the pitch curve of the non-circular driving gear 7 and the non-circular driven gear 9 is obtained by reversely calculating the kinematic curve of the sliding seat 15; the pitch curve of the non-circular driving gear 7 and the non-circular driven gear 9 is formed by fitting a plurality of sections of free curves through the kinematic curve of the sliding seat 15; the kinematic curve of the slide 15 is determined by a variable speed stamping process curve.
10. Nine-bar power-assisted servo hot stamping press with non-circular gears according to claim 7, wherein the force magnitude F output by the slide 15 isMAXWith common torque M on two sets of non-circular driven gears 91The relationship is as follows:
wherein, alpha, lambda and gamma are angle parameters related to mechanism parameters, when alpha, lambda and gamma are all 15 DEG, l8About 500mm, FMAX≈48M1≡48×F1×r2In which F is1The force of the non-circular driven gear at the radial tooth profile is the same as the force of the non-circular driven gear at the radial tooth profile. When the non-circular gear follows the wheel pitch curve to the radial direction r2≈400～600mm，FMAX≈(19.2～28.8)F1。
In the preferred embodiment of the present invention, the common torque M of the two sets of non-circular driving gears 70And M1The relationship is as follows:
considering the restriction of the installation structure and the installation design space of the non-circular gear, the transmission ratio i of the non-circular gear12Typically between 0.5 and 2, i.e. M1＝0.5M0～2M0. Near the nominal stroke, particularly in a low-speed stage, the force output by the non-circular gear driving stamping slide block is relative to the force output by the circular gear driving slide block, the ideal force multiplication factor is about 2, and the force multiplication coefficient of the transmission mechanism is about 9.6-57.6.
The invention has the following characteristics: the crank-slider mechanism comprises a symmetrical non-circular gear pair mechanism, a crank-slider mechanism and a symmetrical toggle rod mechanism; the non-circular gear pair mechanism comprises a driving non-circular gear and a driven non-circular gear; a plurality of servo motors driven in parallel drive a driving non-circular gear shaft to rotate at a constant speed through a speed reducer, and the driving non-circular gear drives a driven non-circular gear to rotate at a constant speed; the driven non-circular gear drives the crank shaft to rotate at a non-uniform speed to push the sliding block to move up and down; the crank slider mechanism drives the toggle rod mechanism to move; the toggle rod mechanism drives the stamping slide seat to realize specific up-down speed change movement. The continuous and precise variable-speed hot stamping process has the advantages that the continuous and precise variable-speed hot stamping process can be realized, the working section low-speed reinforcement, the idle stroke section rapid force reduction, the small-stroke variable-speed reinforcement and the force reduction are combined and linked in the stamping process, the mechanical benefit of a transmission system of the press is further increased, the motor capacity is reduced, better slide block kinematics and dynamic characteristics can be obtained, and the continuous and precise variable-speed hot stamping process is compact in structure, high in rigidity and strength, large in bearing capacity and high in reliability.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (9)
1. A nine-bar force-increasing servo hot stamping press with non-circular gears, comprising: the gear box (3) is arranged at the top of the rack (1), the input end of the gear box (3) is connected with the power device (2), the output end of the gear box (3) is connected with a driving bevel gear (4), the rack (1) below the driving bevel gear (4) is provided with a non-circular gear driving shaft (5) which is horizontally arranged, two ends of the non-circular gear driving shaft (5) are symmetrically provided with non-circular driving gears (7), the middle part of the non-circular gear driving shaft (5) is provided with a driven bevel gear (6), the driving bevel gear (4) is meshed with the driven bevel gear (6), a non-circular gear driven shaft (8) is arranged below the non-circular gear driving shaft (5), and a non-circular driven gear (9) is arranged on the non-circular gear driven shaft (8) corresponding to the non-circular driving gear (7), the non-circular driving gear (7) is meshed with the non-circular driven gear (9), an eccentric shaft (10) is arranged in the middle of a non-circular gear driven shaft (8), a connecting rod (11) is sleeved on the eccentric shaft (10), a sliding block (12) is connected to the tail end of the connecting rod (11), toggle rod mechanisms are symmetrically arranged at the bottom of the sliding block (12), the toggle rod mechanisms are hinged to a sliding seat (15), an upper die (17) is arranged at the bottom of the sliding seat (15), a lower die (19) is arranged below the upper die (17), the lower die (19) is arranged on the surface of a base (20), and the surface of the lower die (19) is used for placing a workpiece (18).
2. The nine-bar power-boosting servo hot stamping press with non-circular gears according to claim 1, wherein the toggle mechanism comprises a driving rod (13), a lower toggle (14) and an upper toggle (15), wherein the upper part of the driving rod (13) is hinged with the slide block (12), the lower part of the lower toggle (14) is hinged with the slide block (15), the upper part of the upper toggle (15) is hinged with the inner side of the frame (1), and the free ends of the driving rod (13), the lower toggle (14) and the upper toggle (15) are hinged together.
3. The nine-bar reinforcement type servo hot stamping press with the non-circular gear is characterized in that balance cylinders (21) are symmetrically arranged on two sides of the frame (1), pull rods (22) are connected to output ends of the balance cylinders (21), support plates (23) which are vertically connected are arranged at the tail ends of the pull rods (22), and the support plates (23) are connected with the sliding base (15).
4. The nine-bar power-boosting servo hot stamping press with non-circular gears as claimed in claim 1, wherein the number of the power units (2) is three, the transmission case (3) has a gear change gear (301), the gear change gear (301) is circumferentially and uniformly engaged with three gear change pinions (302), and each gear change pinion (302) is connected with one power unit (2).
5. Nine-bar power-boost servo hot stamping press with non-circular gear according to claim 1, characterized in that the transmission ratio function i of the non-circular driving gear (7) and non-circular driven gear (9)12Comprises the following steps:
wherein: the rotation angle of the non-circular driving gear (7) is
When the pitch curve has radial direction r1(ii) a The rotation angle of the non-circular driven gear (9) is
The radial direction of the corresponding pitch curve is r2。
6. The nine-bar power servo hot stamping press with non-circular gears according to claim 5, wherein the pitch curve equation of the non-circular driving gear (7) and the non-circular driven gear (9) is:
wherein: a is the center distance between the non-circular driving gear (7) and the non-circular driven gear (9).
7. The nine-bar reinforcement servo hot stamping press with non-circular gears according to claim 6, characterized in that the pitch curve of the non-circular driving gear (7) and the non-circular driven gear (9) is obtained by inverse calculation of the kinematic curve of the slide (15); the pitch curve of the non-circular driving gear (7) and the non-circular driven gear (9) is formed by fitting a plurality of sections of free curves through the kinematic curve of the sliding seat (15); the kinematic curve of the slide (15) is determined from a variable-speed stamping process curve.
8. Nine-bar power-assisted servo hot stamping press with non-circular gear according to claim 7, characterized in that the slide (15) outputs a force of magnitude FMAXWith common torque M on two sets of non-circular driven gears (9)1The relationship is as follows:
in the formula, α, λ, and γ are angle parameters related to mechanism parameters.
9. Nine-bar power-assisted servo hot stamping press with non-circular gear according to claim 8, characterized in that the common torque M on the two sets of non-circular driving gears (7)0And M1The relationship is as follows:
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110925530.7A CN113680876A (en) | 2021-08-12 | 2021-08-12 | Nine-rod reinforcement type servo hot stamping press with non-circular gear |
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| CN202110925530.7A CN113680876A (en) | 2021-08-12 | 2021-08-12 | Nine-rod reinforcement type servo hot stamping press with non-circular gear |
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Application publication date: 20211123 |
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