A crank high speed punch with dynamic bottom dead center compensation

Abstract

The present application relates to punch press equipment technical field, the present application discloses a kind of toggle high-speed punch press of bottom dead point dynamic compensation, including bed, counterweight, main slider and transmission mechanism, transmission mechanism includes power input mechanism, swing bar, lower link, upper link and adjusting mechanism, power input mechanism includes transmission shaft that is set on bed and reciprocates along vertical sliding;The middle part of swing bar is rotatably connected with bed, its lower end is connected with main slider transmission by lower link, and its upper end is connected with counterweight transmission by upper link;Adjusting mechanism includes first connecting rod, second connecting rod and adjusting drive assembly, one end of first connecting rod is pivotally connected with one end of second connecting rod, the other end of first connecting rod is rotatably connected with transmission shaft, the other end of second connecting rod is rotatably connected with the upper end of swing bar, adjusting drive assembly is connected with the pivot joint of first connecting rod, second connecting rod transmission, for the included angle between the fine adjustment of both.This application realizes bottom dead point dynamic compensation and heavy load high-speed stamping.

Description

Technical Field

[0001] This invention relates to the field of punch press equipment technology, and in particular to a toggle-type high-speed punch press with dynamic compensation for bottom dead center. Background Technology

[0002] A toggle press, also known as a multi-link press, is a stamping device that converts rotary motion into the reciprocating linear motion of a slide using a multi-link mechanism. Toggle presses offer advantages such as high transmission efficiency, amplified stamping force due to the linkage structure, and a smooth slide motion curve at the bottom dead center, making them widely used in precision stamping. A typical toggle press usually includes a crankshaft, a counterweight, a linkage mechanism, and a slide. The crankshaft rotation drives the linkage mechanism to move the slide vertically to complete the stamping operation. Simultaneously, the linkage mechanism drives the counterweight to move in the opposite direction to counteract the inertial force generated by the slide's reciprocating motion, ensuring the stability of the equipment operation.

[0003] However, in actual high-speed stamping processes, the bottom dead center (BDC) position of the toggle press is prone to shift, affecting the consistency of the stamped parts. There are two main reasons for this shift: First, as stamping efficiency increases, the crankshaft speed continuously increases, leading to a significant increase in the system's inertial force. This fluctuation in inertial force directly affects the transmission mechanism, causing fluctuations in the BDC position of the main slide, making it difficult to maintain a stable stamping depth and limiting the improvement of stamping efficiency. Second, changes in ambient temperature and the heat accumulation caused by friction at the joints of the transmission mechanism during high-speed operation result in thermal expansion and contraction of the connecting rods. This length change alters the relative positions of the hinge points, causing the BDC position to drift, ultimately negatively impacting the consistency of the stamped parts and also hindering further improvements in stamping efficiency.

[0004] Furthermore, in conventional toggle presses, the crankshaft is directly connected to the slide block via a connecting rod structure, and the punching force is transmitted to the bed through the slide block and its sliding guide rails. During this process, the slide block must perform high-frequency reciprocating motion while also bearing enormous punching forces as the main load-bearing component. This leads to a sharp increase in contact stress between the slide block and the guide rails, easily causing problems such as guide rail wear, overheating, and elastic deformation of the slide block, severely affecting guiding accuracy and equipment lifespan. Simultaneously, the punching force must travel through a relatively long and gap-filled transmission path of slide block-guide rail-bed, and the impact load exacerbates vibration and noise, which is detrimental to high-speed operation. Increasing the size of the slide block and guide rails to meet heavy-load requirements also increases the mass of moving parts, leading to increased inertial forces, which in turn limits the increase in stamping speed. Therefore, conventional structures cannot simultaneously meet the dual requirements of heavy-load and high-speed stamping.

[0005] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a toggle high-speed punch press with dynamic compensation for bottom dead center, so as to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A high-speed punch press with dynamic compensation for bottom dead center includes: a bed, a balance block vertically slidably connected to the bed, a main slide block vertically slidably connected to the bed, and a transmission mechanism. The transmission mechanism is drively connected to the balance block and the main slide block to drive them to perform synchronous and opposite movements. The transmission mechanism includes: The power input mechanism includes a drive shaft that is horizontally mounted on the bed and slides reciprocally along the vertical direction; The swing arm is rotatably connected to the bed in the middle. The lower connecting rod is rotatably connected at both ends to the lower end of the swing arm and the main slider, respectively. The upper connecting rod is rotatably connected at both ends to the upper end of the swing arm and the balance block, respectively. The adjustment mechanism includes a first link, a second link, and an adjustment drive assembly. One end of the first link is pivotally connected to one end of the second link, the other end of the first link is rotatably connected to a drive shaft, and the other end of the second link is rotatably connected to the upper end of a rocker arm. The adjustment drive assembly is driven to the pivot point of the first and second links and is used to finely adjust the included angle between them.

[0008] Furthermore, the adjustment mechanism and the rocker arm are both set into two groups, and are symmetrically arranged on both sides of the power input mechanism.

[0009] Furthermore, it also includes two first short shafts, each of which is connected to the middle of the corresponding rocker arm. The two ends of the first short shaft are rotatably connected to the bed through bearing seats, and the rocker arm has extensions on both sides that extend axially along the first short shaft.

[0010] Furthermore, the adjustment drive component includes: Adjust the crankshaft to rotate in conjunction with the bed; The servo motor is mounted on the bed, and its output shaft is connected to the adjusting crankshaft to drive the adjusting crankshaft to rotate. The adjusting connecting rod is rotatably connected at one end to the first eccentric part of the adjusting crankshaft, and rotatably connected at the pivot joint of the first connecting rod and the second connecting rod.

[0011] Furthermore, a second short shaft is fixedly provided at the lower end of the adjusting link, two first links are symmetrically arranged and rotatably connected to the second short shaft through a first copper sleeve, and two second links are symmetrically arranged and rotatably connected to the second short shaft through a second copper sleeve.

[0012] Furthermore, the power input mechanism also includes: The main crankshaft is rotatably connected to the bed and is used to input external power; The main connecting rod is rotatably connected at one end to the second eccentric part of the main crankshaft and at the other end to the drive shaft.

[0013] Furthermore, each end of the drive shaft is connected to a slide block, and the bed is provided with a slide plate corresponding to each of the two slide blocks. The slide blocks are slidably connected to the slide plates in the vertical direction.

[0014] Furthermore, the balance block includes: The counterweight body is vertically slidably connected to the bed. The first protrusion is fixed in the middle of the balance block body and extends downward. The first protrusion is located between the two adjustment drive components. Two second protrusions are fixed at both ends of the balance block body and extend downwards. The upper end of the upper connecting rod is rotatably connected to the lower end of the corresponding second protrusion.

[0015] Furthermore, the main slider is provided with two vertically arranged connecting posts, which are rotatably connected to the corresponding lower connecting rods, and the pivot points of the two connecting posts and the lower connecting rods are connected by a crossbar.

[0016] Furthermore, the bed is provided with a first guide sleeve corresponding to the two connecting columns, and the connecting columns are slidably connected to the first guide sleeve in the vertical direction.

[0017] Beneficial effects: This invention provides a toggle-type high-speed punch press with dynamic compensation for bottom dead center. By adjusting the angle between the first and second connecting rods in real time through an adjustment mechanism, the overall equivalent length of the two rods is changed, thereby fine-tuning the angle of the rocker arm. Ultimately, this accurately compensates for the positional offset of the bottom dead center of the main slide. This compensation process can be completed in real time during continuous punching operation without stopping the machine, ensuring that the bottom dead center position of the main slide remains within the set tolerance range during each punching process. This improves the repeatability accuracy of the bottom dead center position, thus guaranteeing the dimensional accuracy and consistency of the stamped parts. Simultaneously, the rocker arm is rotatably connected to the bed. The punching force is transmitted to the rocker arm via the lower connecting rod, and then directly to the bed, bypassing the sliding guide rail of the main slide. The load-bearing capacity of the rotating joint is much higher than that of the sliding joint, and the force path is shorter and the rigidity is better. This effectively avoids the wear, heat generation, and deformation problems caused by the huge punching force on the slide and guide rail in conventional structures, thus simultaneously meeting the requirements of heavy-duty and high-speed punching. Attached Figure Description

[0018] Figure 1 The structure of the toggle-type high-speed punch press with dynamic compensation for bottom dead center provided by the present invention Figure 1 ; Figure 2 The structure of the toggle-type high-speed punch press with dynamic compensation for bottom dead center provided by the present invention Figure 2 ; Figure 3 A front sectional view of the toggle high-speed punch press with dynamic compensation for bottom dead center provided by the present invention. Figure 4 A side sectional view of the toggle high-speed punch press with bottom dead center dynamic compensation provided by the present invention. Figure 5 An exploded view of the toggle high-speed punch press with dynamic compensation for bottom dead center provided by the present invention; Figure 6 This is a schematic diagram of the connections of the rods in the toggle high-speed punch press with dynamic compensation for bottom dead center provided by the present invention.

[0019] Reference numerals: Bed 1, First short shaft 11, Shaft seat 12, Slide plate 13, First guide sleeve 14, First guide post 15, Second guide post 16, Balance block 2, Balance block body 21, First protrusion 22, Second protrusion 23, Second guide sleeve 24, Main slide block 3, Connecting post 31, Crossbar 32, Third guide sleeve 33, Power input mechanism 4, Transmission shaft 41, Slide 411, Main crankshaft 42, Second eccentric part 421, Main connecting rod 43, Swing rod 5, Extension part 51, Lower connecting rod 6, Third copper sleeve 61, Upper connecting rod 7, Adjustment mechanism 8, First connecting rod 81, Second connecting rod 82, Adjustment drive assembly 83, Adjustment crankshaft 831, First eccentric part 8311, Servo motor 832, Adjustment connecting rod 833, Second short shaft 834. Detailed Implementation

[0020] This invention provides a high-speed toggle press with dynamic compensation for bottom dead center. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0021] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0022] Please see Figures 1 to 6As shown, the present invention provides a toggle high-speed punch press with dynamic compensation for bottom dead center, including a bed 1, a balance block 2 vertically slidably connected to the bed 1, a main slide block 3 vertically slidably connected to the bed 1, and a transmission mechanism. The transmission mechanism is connected to the balance block 2 and the main slide block 3 to drive them to perform synchronous reverse motion.

[0023] The transmission mechanism includes a power input mechanism 4, a rocker arm 5, a lower connecting rod 6, an upper connecting rod 7, and an adjustment mechanism 8. The power input mechanism 4 includes a transmission shaft 41 that is horizontally arranged and reciprocates vertically on the bed 1. The middle part of the rocker arm 5 is rotatably connected to the bed 1. The two ends of the lower connecting rod 6 are rotatably connected to the lower end of the rocker arm 5 and the main slider 3, respectively. The two ends of the upper connecting rod 7 are rotatably connected to the upper end of the rocker arm 5 and the balance block 2, respectively. The adjustment mechanism 8 includes a first connecting rod 81, a second connecting rod 82, and an adjustment drive assembly 83. One end of the first connecting rod 81 is pivotally connected to one end of the second connecting rod 82, and the other end of the first connecting rod 81 is rotatably connected to the transmission shaft 41. The other end of the second connecting rod 82 is rotatably connected to the upper end of the rocker arm 5. The adjustment drive assembly 83 is connected to the pivot of the first connecting rod 81 and the second connecting rod 82 for fine-tuning the included angle between them.

[0024] During stamping, an external power source drives the transmission shaft 41 in the power input mechanism 4 to slide vertically back and forth. The movement of the transmission shaft 41 is transmitted to the swing arm 5 through the adjustment mechanism 8. Specifically, the transmission shaft 41 is rotatably connected to one end of the first connecting rod 81, the other end of the first connecting rod 81 is pivotally connected to one end of the second connecting rod 82, and the other end of the second connecting rod 82 is rotatably connected to the upper end of the swing arm 5. Thus, the vertical reciprocating motion of the transmission shaft 41 is converted into the swing of the swing arm 5 around its central fulcrum via the first connecting rod 81 and the second connecting rod 82. When the swing arm 5 swings, its upper end drives the balance block 2 to slide vertically along the bed 1 through the upper connecting rod 7, and its lower end drives the main slide block 3 to slide vertically along the bed 1 through the lower connecting rod 6. Since the upper and lower ends of the swing arm 5 move in opposite directions, the balance block 2 and the main slide block 3 achieve synchronous reverse motion: when the main slide block 3 moves downward to stamp, the balance block 2 moves upward, thereby counteracting the inertial force generated by the reciprocating motion of the main slide block 3 and ensuring smooth operation of the equipment.

[0025] During the stamping process, when it is necessary to fine-tune the bottom dead center position, the adjustment drive component 83 is activated to fine-tune the angle between the first link 81 and the second link 82. The change in the angle changes the overall equivalent length of the first link 81 and the second link 82, thereby fine-tuning the angle of the rocker arm 5, and finally accurately compensating for the positional offset of the bottom dead center of the main slide block 3, ensuring the consistency of the stamping depth.

[0026] Through the above settings, on the one hand, the adjustment mechanism 8 can finely adjust the angle between the first connecting rod 81 and the second connecting rod 82 in real time to achieve precise compensation of the bottom dead center position of the main slide block 3. On the other hand, the middle part of the swing arm 5 is rotatably connected to the bed 1. The punching force is transmitted to the swing arm 5 via the lower connecting rod 6, and then directly to the bed 1 by the swing arm 5. It does not need to go through the sliding guide rail of the main slide block 3. The bearing capacity of the rotating pair is much higher than that of the sliding pair, and the force path is short and the rigidity is good. It can simultaneously meet the requirements of heavy-duty and high-speed stamping, and is especially suitable for heavy-duty high-speed stamping occasions with high bottom dead center accuracy requirements.

[0027] It should be further noted that the bed 1 is equipped with a grating ruler, and the main slide 3 is equipped with a detection block that cooperates with the grating ruler. The actual bottom dead center position of the main slide 3 is obtained in real time by measuring the relative displacement between the detection block and the grating ruler. The control system of the punch press receives this position signal and compares it with the preset bottom dead center target value to calculate the offset. Subsequently, the controller sends a control command to the servo motor 832 according to the offset, driving the adjusting crankshaft 831 to rotate by a corresponding angle. By adjusting the connecting rod 833, the angle between the first connecting rod 81 and the second connecting rod 82 is finely adjusted, thereby accurately correcting the bottom dead center position of the main slide 3 and forming a closed-loop dynamic compensation. The above-mentioned position detection method and control principle are all existing technologies, and their specific structures and control algorithms will not be described in detail here.

[0028] In a preferred embodiment, see [reference] Figure 3 The adjustment mechanism 8 and the swing arm 5 are both configured in two sets, symmetrically arranged on both sides of the power input mechanism 4. During operation, the transmission shaft 41 slides vertically back and forth, simultaneously driving the adjustment mechanisms 8 on both sides, which in turn causes the swing arms 5 on both sides to swing synchronously. These swing arms then drive the balance block 2 and the main slider 3 via their respective upper connecting rods 7 and lower connecting rods 6. Because the structures on both sides are completely symmetrical, the driving force applied to the balance block 2 and the main slider 3 is evenly distributed, avoiding uneven loading. This configuration makes the overall machine more evenly stressed, reduces the torsional and bending deformation of the bed 1, and improves the straightness and stability of the main slider 3 during high-speed operation.

[0029] In a preferred embodiment, see [reference] Figure 5It also includes two first short shafts 11, each of which is connected to the middle of the corresponding rocker arm 5. The two ends of the first short shaft 11 are rotatably connected to the bed 1 via bearing seats 12. Extensions 51 extending axially along the first short shaft 11 are provided on both sides of the rocker arm 5. By providing the extensions 51, the contact area between the rocker arm 5 and the first short shaft 11 in the axial direction is increased, making the connection more stable and effectively improving the load-bearing capacity and structural rigidity of the connection. During heavy-load high-speed stamping, the rocker arm 5 bears alternating tensile and compressive loads from the lower connecting rod 6 and the upper connecting rod 7. The presence of the extensions 51 allows the load to be distributed more evenly along the entire length of the first short shaft 11, avoiding localized stress concentration, thereby enhancing the stability and fatigue resistance of the rocker arm 5 as it swings around the first short shaft 11. In addition, the bearing seat 12 is fixed on the bed 1, and the two ends of the first short shaft 11 are rotatably connected to the bearing seat 12 through rolling bearings or sliding bearings, which further improves the reliability and stability of the rotatable connection between the rocker arm 5 and the bed 1, and provides strong support for realizing heavy-load high-speed stamping.

[0030] In a preferred embodiment, see [reference] Figure 3 , 5The adjustment drive assembly 83 includes an adjustment crankshaft 831, a servo motor 832, and an adjustment connecting rod 833. The adjustment crankshaft 831 is rotatably connected to the bed 1. The servo motor 832 is mounted on the bed 1, and its output shaft is driven by the adjustment crankshaft 831 to drive its rotation. One end of the adjustment connecting rod 833 is rotatably connected to the first eccentric portion 8311 of the adjustment crankshaft 831, and the other end is rotatably connected to the pivot joint of the first connecting rod 81 and the second connecting rod 82. During operation, when it is necessary to compensate for the offset of the bottom dead center position, the servo motor 832 drives the adjustment crankshaft 831 to rotate by a certain angle. The first eccentric portion 8311 of the adjustment crankshaft 831 then rotates around the axis of the adjustment crankshaft 831, causing the adjustment connecting rod 833 to produce a corresponding displacement. When the adjusting rod 833 moves upward, the angle between the first connecting rod 81 and the second connecting rod 82 decreases, and their equivalent lengths shorten. The upper end of the swing rod 5 swings towards the power input mechanism 4, while the lower end of the swing rod 5 swings outward. This pulls the main slider 3 upward via the lower connecting rod 6. Simultaneously, the upper end of the swing rod 5 pulls the balance block 2 downward via the upper connecting rod 7, maintaining the synchronous counter-movement of the main slider 3 and the balance block 2. Conversely, when the adjusting rod 833 moves downward, the angle between the first connecting rod 81 and the second connecting rod 82 increases, and their equivalent lengths lengthen. The upper end of the swing rod 5 swings away from the power input mechanism 4, while the lower end of the swing rod 5 swings inward. This pushes the main slider 3 downward via the lower connecting rod 6. Simultaneously, the upper end of the swing rod 5 pushes the balance block 2 upward via the upper connecting rod 7, again maintaining the synchronous counter-movement of the main slider 3 and the balance block 2. Through the above settings, real-time and precise compensation of the bottom dead center position of the main slider 3 is achieved, and adjustment can be completed without stopping the machine. The servo motor 832 precisely controls the rotation angle of the crankshaft 831, and then determines the adjustment range of the angle between the first connecting rod 81 and the second connecting rod 82 by adjusting the displacement of the connecting rod 833, thereby achieving fine-tuning compensation of the bottom dead center position of the main slide block 3. During each stamping process, the bottom dead center position of the main slide block 3 is always kept within the set tolerance range, which significantly improves the repeatability accuracy of the bottom dead center position of the main slide block 3, thus ensuring the dimensional accuracy and consistency of the stamped parts.

[0031] It should be noted that the adjusting crankshafts 831 of the two sets of adjusting drive components 83 rotate synchronously in opposite directions to ensure symmetrical movement of the first connecting rod 81 and the second connecting rod 82 on both sides. Specifically, when the adjusting crankshaft 831 on one side rotates clockwise, the adjusting crankshaft 831 on the other side rotates counterclockwise by the same angle, causing the adjusting connecting rods 833 on both sides to produce displacements in opposite directions. This causes the angle between the first connecting rod 81 and the second connecting rod 82 on both sides to increase or decrease synchronously, thereby ensuring the dynamic balance of the main slider 3 and the balance block 2 during movement.

[0032] Preferably, see Figure 3The adjusting link 833, the first link 81, and the second link 82 form an inverted "Y"-shaped mechanism. The adjusting link 833 serves as the main trunk, its lower end rotatably connected to the pivot joint of the first link 81 and the second link 82, and its upper end connected to the first eccentric portion 8311 of the adjusting crankshaft 831. The first link 81 and the second link 82 serve as two branches, extending diagonally downwards from the pivot joint and connecting to their respective drive shafts 41 and the upper end of the rocker arm 5. This arrangement positions the adjusting link 833 above the power input mechanism 4 and the rocker arm 5, effectively preventing positional interference between the adjusting drive assembly 83 and the power input mechanism 4 and the rocker arm 5, while also reducing the horizontal lateral dimension, making the overall structure more compact.

[0033] Further, see Figure 5 The lower end of the adjusting link 833 is fixed with a second short shaft 834. Two first links 81 are symmetrically arranged and rotatably connected to the second short shaft 834 via a first copper sleeve. Two second links 82 are symmetrically arranged and rotatably connected to the second short shaft 834 via a second copper sleeve. Through this arrangement, the first links 81 and the second links 82 share the same second short shaft 834 as the rotation center, ensuring the coaxiality of each link during movement, thereby guaranteeing the stability of the linkage between the power input mechanism 4 and the rocker arm 5. Simultaneously, the first and second copper sleeves serve as rotating bushings between the first link 81, the second link 82, and the second short shaft 834, respectively, possessing good wear resistance and self-lubricating properties, effectively reducing the coefficient of friction, minimizing wear on the moving parts, and extending service life. Furthermore, the symmetrical arrangement ensures uniform force distribution and synchronized movement of the first links 81 and the second links 82 on both sides, further improving the smoothness and control accuracy of the adjusting mechanism 8, making the linkage between the power input mechanism 4 and the rocker arm 5 more reliable and stable.

[0034] In a preferred embodiment, see [reference] Figure 4 The power input mechanism 4 further includes a main crankshaft 42 and a main connecting rod 43. The main crankshaft 42 is rotatably connected to the bed 1 for inputting external power. One end of the main connecting rod 43 is rotatably connected to the second eccentric part 421 of the main crankshaft 42, and the other end is connected to the transmission shaft 41. During operation, the external power source drives the main crankshaft 42 to rotate around its axis, and the second eccentric part 421 on the main crankshaft 42 performs circular motion accordingly, causing one end of the main connecting rod 43 to revolve around the axis of the main crankshaft 42. The other end of the main connecting rod 43 is connected to the transmission shaft 41, converting the oscillation of the main connecting rod 43 into the reciprocating sliding of the transmission shaft 41 in the vertical direction. Through the above configuration, the rotational motion of the main crankshaft 42 is converted into the linear motion of the transmission shaft 41 via the main connecting rod 43, achieving smooth power transmission. At the same time, the eccentricity of the second eccentric part 421 determines the stroke length of the transmission shaft 41, which can be designed and adjusted according to the stamping process requirements to meet different stamping depth requirements.

[0035] In the above, the external power source includes a drive motor and a belt drive assembly. The drive motor transmits power to the main crankshaft 42 through the belt drive assembly, thereby driving the main crankshaft 42 to rotate.

[0036] Further, see Figure 4 , 5 The drive shaft 41 has slide blocks 411 connected to both ends. The bed 1 has slide plates 13 corresponding to the two slide blocks 411. The slide blocks 411 are slidably connected to the slide plates 13 in the vertical direction. Through the above arrangement, the two ends of the drive shaft 41 are guided by the sliding cooperation between the slide blocks 411 and the slide plates 13, so that the drive shaft 41 always maintains a linear motion trajectory during the vertical reciprocating sliding process, effectively reducing frictional resistance and improving transmission accuracy and motion stability.

[0037] In a preferred embodiment, see [reference] Figure 3 The balance block 2 includes a balance block body 21, a first protrusion 22, and a second protrusion 23. The balance block body 21 is slidably connected to the bed 1 vertically. The first protrusion 22 is fixed in the middle of the balance block body 21 and extends downward, located between two adjustment drive components 83. The two second protrusions 23 are respectively fixed at both ends of the balance block body 21 and extend downward. The upper end of the upper connecting rod 7 is rotatably connected to the lower end of the corresponding second protrusion 23. Through the above arrangement, the balance block body 21, the first protrusion 22, and the two second protrusions 23 together form an "M"-shaped structure. Two receiving spaces are formed between the first protrusion 22 and the second protrusions 23 on both sides, which are used to accommodate the corresponding adjustment drive components 83, allowing the adjustment drive components 83 to be embedded inside the balance block 2, thereby effectively reducing the vertical height of the entire machine and making the structure more compact. Meanwhile, the "M"-shaped structure makes the center of mass of the balance block 2 more central, reduces the off-center load torque during the sliding process, and further improves the stability of the balance block 2 sliding along the bed 1.

[0038] Furthermore, the two ends of the balance block body 21 are respectively provided with second guide sleeves 24, and the bed 1 is provided with first guide posts 15 corresponding to the two second guide sleeves 24 one by one. The second guide sleeves 24 are slidably connected to the first guide posts 15 in the vertical direction, thereby accurately guiding the movement of the balance block 2.

[0039] In a preferred embodiment, see [reference] Figure 3The main slider 3 is equipped with two vertically arranged connecting posts 31, which are rotatably connected to their respective lower connecting rods 6. The pivot points of the two connecting posts 31 and the lower connecting rods 6 are connected by a crossbar 32. Through this arrangement, the crossbar 32 rigidly connects the pivot points of the lower connecting rods 6 on both sides to the main slider 3, ensuring that the driving force of the lower connecting rods 6 on both sides on the main slider 3 remains synchronized, effectively preventing the main slider 3 from tilting or jamming due to uneven force on both sides. Simultaneously, the two vertically arranged connecting posts 31 provide additional guiding support for the main slider 3, enhancing its straightness and stability during high-speed reciprocating motion.

[0040] Specifically, a third short shaft 311 is fixed at the upper end of the connecting column 31, and the lower connecting rod 6 is rotatably connected to the corresponding third short shaft 311 through the third copper sleeve 61. The two ends of each crossbar 32 are respectively connected to the ends of the two third short shafts 311 to realize synchronous driving between the lower connecting rods 6 on both sides and the main slider 3.

[0041] In this embodiment, see Figure 3 The main slider 3 is provided with four symmetrically arranged third guide sleeves 33, and the bed 1 is provided with four second guide posts 16 corresponding to the third guide sleeves 33. The four second guide posts 16 are respectively slidably engaged with the four third guide sleeves 33 to form a stable guiding structure, ensuring that the main slider 3 always makes smooth reciprocating motion in the vertical direction.

[0042] In a preferred embodiment, see [reference] Figure 3 The bed 1 is provided with a first guide sleeve 14 corresponding to the two connecting columns 31, and the connecting columns 31 are slidably connected to the first guide sleeve 14 in the vertical direction. Through the above arrangement, the first guide sleeve 14 provides vertical guidance for the connecting columns 31, further enhancing the linearity and stability of the main slide block 3. At the same time, the sliding cooperation between the first guide sleeve 14 and the connecting columns 31 shares the guiding load between the main slide block 3 and the guide rail of the bed 1, reducing the wear of the guide rail pair of the main slide block 3, and helping to extend the service life of the entire machine's guiding system.

[0043] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A toggle-type high-speed punch press with dynamic compensation for bottom dead center, comprising: The bed (1), a balance block (2) vertically slidably connected to the bed (1), a main slider (3) vertically slidably connected to the bed (1), and a transmission mechanism, wherein the transmission mechanism is connected to the balance block (2) and the main slider (3) to drive them to move synchronously in opposite directions, characterized in that the transmission mechanism includes: The power input mechanism (4) includes a drive shaft (41) that is horizontally arranged and reciprocally slides on the bed (1) in the vertical direction; The swing arm (5) is rotatably connected to the bed (1) in the middle; The lower connecting rod (6) is rotatably connected at both ends to the lower end of the swing rod (5) and the main slider (3); The upper connecting rod (7) is rotatably connected at both ends to the upper end of the swing rod (5) and the balance block (2), respectively; The adjustment mechanism (8) includes a first link (81), a second link (82), and an adjustment drive assembly (83). One end of the first link (81) is pivotally connected to one end of the second link (82), and the other end of the first link (81) is rotatably connected to the transmission shaft (41). The other end of the second link (82) is rotatably connected to the upper end of the swing arm (5). The adjustment drive assembly (83) is connected to the pivot of the first link (81) and the second link (82) for fine adjustment of the included angle between them.

2. The toggle-type high-speed punch press with dynamic compensation for bottom dead center as described in claim 1, characterized in that, The adjustment mechanism (8) and the swing arm (5) are both set into two groups and are symmetrically arranged on both sides of the power input mechanism (4).

3. The toggle-type high-speed punch press with dynamic compensation for bottom dead center as described in claim 2, characterized in that, It also includes two first short shafts (11), each first short shaft (11) is connected to the middle of the corresponding rocker arm (5), and the two ends of the first short shaft (11) are rotatably connected to the bed (1) through the bearing seat (12). The rocker arm (5) has extensions (51) extending axially along the first short shaft (11) on both sides.

4. The toggle-type high-speed punch press with dynamic compensation for bottom dead center according to claim 2, characterized in that, The adjustment drive component (83) includes: Adjust the crankshaft (831) to rotate and connect it to the bed (1); A servo motor (832) is mounted on the bed (1), and its output shaft is connected to the adjusting crankshaft (831) for driving the adjusting crankshaft (831) to rotate. The adjusting link (833) is rotatably connected at one end to the first eccentric part (8311) of the adjusting crankshaft (831), and at the other end to the pivot joint of the first link (81) and the second link (82).

5. The toggle-type high-speed punch press with dynamic compensation for bottom dead center as described in claim 4, characterized in that, The lower end of the adjusting link (833) is fixed with a second short shaft (834). Two first links (81) are symmetrically arranged and rotatably connected to the second short shaft (834) through a first copper sleeve. Two second links (82) are symmetrically arranged and rotatably connected to the second short shaft (834) through a second copper sleeve.

6. The toggle-type high-speed punch press with dynamic compensation for bottom dead center according to claim 2, characterized in that, The power input mechanism (4) also includes: The main crankshaft (42) is rotatably connected to the bed (1) and is used to input external power; The main connecting rod (43) is rotatably connected at one end to the second eccentric part (421) of the main crankshaft (42), and at the other end to the drive shaft (41).

7. The toggle-type high-speed punch press with dynamic compensation for bottom dead center according to claim 2, characterized in that, The two ends of the drive shaft (41) are respectively connected to slides (411), and the bed (1) is provided with slide plates (13) corresponding to the two slides (411) one by one. The slides (411) are slidably connected to the slide plates (13) in the vertical direction.

8. The toggle-type high-speed punch press with dynamic compensation for bottom dead center according to claim 2, characterized in that, The balance block (2) includes: The balance block body (21) is slidably connected to the bed (1) in the vertical direction; The first protrusion (22) is fixed in the middle of the balance block body (21) and extends downward. The first protrusion (22) is located between the two adjustment drive components (83). Two second protrusions (23) are fixed at both ends of the balance block body (21) and extend downwards. The upper end of the upper connecting rod (7) is rotatably connected to the lower end of the corresponding second protrusion (23).

9. The toggle-type high-speed punch press with dynamic compensation for bottom dead center according to claim 2, characterized in that, The main slider (3) is provided with two vertically arranged connecting columns (31). The two connecting columns (31) are rotatably connected to the corresponding lower connecting rods (6), and the pivot points of the two connecting columns (31) and the lower connecting rods (6) are connected by a crossbar (32).

10. The toggle-type high-speed punch press with dynamic compensation for bottom dead center according to claim 9, characterized in that, The bed (1) is provided with a first guide sleeve (14) corresponding to two connecting columns (31), and the connecting columns (31) are slidably connected to the first guide sleeve (14) in the vertical direction.

Images