A toggle-type press and a method for adjusting the mold mounting height.

Abstract

This invention provides a toggle-type press and a method for adjusting the mold mounting height, relating to the field of presses. The solution includes an upper crossbeam, on which a main shaft is rotatably mounted. The main shaft is connected to a drive motor and is connected to two toggle mechanisms via a main transmission screw. The two toggle mechanisms are connected to sliders. The press also includes an adjusting rod one and an adjusting rod two, both of which are vertically mounted on the upper crossbeam. The lower ends of the adjusting rods one and two are hinged to their respective toggle mechanisms. The main shaft transmits power to the adjusting rods one and two via a clutch assembly. This invention allows for mold mounting height adjustment using the press's drive unit, eliminating the need for a separate dedicated drive unit.

Description

Technical Field

[0001] This invention relates to the field of presses, and more particularly to an elbow-type press and a method for adjusting the mold height. Background Technology

[0002] The die mounting height of a mechanical press refers to the distance between the bottom surface of the slide and the worktable surface when the slide is at its lowest point. In practical applications, due to the different types of plastic molding processes used by the press or the different sizes of the workpieces, the die mounting height is usually adjusted to adapt the press to the requirements of different working conditions.

[0003] In the prior art, Chinese utility model patent with authorization announcement number CN204953797U provides a double-curved elbow press with easily adjustable mold mounting height. The press includes a frame, a mold mounting height adjustment device, a main oil cylinder, a guide column, a drive head, a working slide, and an elbow structure. The mold mounting height adjustment device includes a servo motor, a gear ring, a gear, a lead screw, an adjustment slide, a guide rail, and an adjustment oil cylinder. When the gear rotates, the nut inside the gear can synchronously drive the lead screw and the adjustment slide to perform corresponding vertical lifting and lowering actions. When the adjustment slide moves, it will drive the working slide to move up and down along the guide rail through the elbow structure, thereby achieving the purpose of adjusting the mold mounting height to a suitable position by raising and lowering the adjustment slide.

[0004] When adopting the above technical solutions, the mold height adjustment device needs a dedicated drive unit—a servo motor—separately from the main cylinder to provide power. This means that during the stamping process, the adjusting slider receives the reaction force from the working slider. To address this, the above solutions use a hydraulic system containing valves and adjusting cylinders to absorb energy and buffer the impact of the working slider's force. However, this undoubtedly increases the complexity and space occupation of the mold height adjustment device. Summary of the Invention

[0005] To address the technical problem of overly complex structures in existing press mold height adjustment devices, this invention provides a toggle-type press and a mold height adjustment method that can adjust the mold height using the press's drive unit without requiring a separate dedicated drive unit.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a toggle-type press, including an upper crossbeam, a main shaft rotatably mounted on the upper crossbeam, the main shaft being connected to a drive motor, the main shaft being connected to two toggle mechanisms via a main transmission screw, the two toggle mechanisms being connected to sliders, and further including: an adjusting rod one and an adjusting rod two, both of which are vertically mounted on the upper crossbeam, the lower ends of the adjusting rod one and the adjusting rod two being hinged to the corresponding toggle mechanisms, the main shaft transmitting power to the adjusting rod one and the adjusting rod two via a clutch assembly one; and a clutch assembly two, which is disposed between the main shaft and the main transmission screw.

[0007] This invention achieves a highly integrated design by setting clutch assembly one and clutch assembly two between the main shaft and adjusting rod one, adjusting rod two, and main drive screw, respectively. This allows for the simultaneous completion of mold height adjustment and normal stamping operations using the same drive motor. Compared with the independent servo motor drive unit and complex hydraulic buffer system in the prior art, this invention significantly simplifies the mechanical structure and reduces manufacturing costs and space occupation.

[0008] Furthermore, position sensors are provided between the first adjusting rod and the upper crossbeam, and between the second adjusting rod and the upper crossbeam. The position sensors can detect the position of the hinge point at the end of the first adjusting rod or the second adjusting rod. The clutch assembly includes a clutch module and a clutch module. The main shaft transmits power to the first adjusting rod through the clutch module and transmits power to the second adjusting rod through the clutch module.

[0009] This invention, by setting two position sensors and employing an independent control structure of clutch module one and clutch module two between the main shaft and the adjusting rod, realizes real-time monitoring and independent precise adjustment of the position of the double-sided hinge point, effectively solving the problems of slider tilting and uneven load wear caused by the lack of leveling function in traditional presses.

[0010] Furthermore, it also includes a second clutch assembly, which is disposed between the main shaft and the main drive screw.

[0011] This invention achieves decoupling of leveling and height adjustment by setting a second clutch component, eliminating mutual interference between leveling and height setting, and improving adjustment efficiency and one-time success rate.

[0012] Furthermore, the main shaft is rotatably equipped with a first driving pulley and a second driving pulley. The first driving pulley transmits power to the main shaft through the first clutch module, and the second driving pulley transmits power to the main shaft through the second clutch module. The first driving pulley is connected to the first transmission assembly through the first synchronous belt and the first driven pulley. The first transmission assembly is connected to the first adjusting rod, and the first transmission assembly can drive the first adjusting rod to rise and fall. The second driving pulley is connected to the second transmission assembly through the second synchronous belt and the second driven pulley. The second transmission assembly is connected to the second adjusting rod, and the second transmission assembly can drive the second adjusting rod to rise and fall.

[0013] Furthermore, both the first and second drive pulleys are provided with external spline sleeves on their end faces. The external spline sleeves are rotatably mounted on the main shaft. The clutch assembly includes a housing and a friction plate. Multiple electromagnets are uniformly arranged inside the housing. The friction plate is mounted on the main shaft. Both the first and second clutch modules include driven discs. Two driven discs are respectively disposed on the upper and lower surfaces of the friction plate. The two driven discs can move axially along the corresponding external spline sleeves. A return spring is provided between the first drive pulley and the corresponding driven disc, and between the second drive pulley and the corresponding driven disc. An armature is provided in the area of ​​the driven disc near the electromagnet. When the armature is attracted by the corresponding electromagnet, the driven disc can be in close contact with the friction plate to achieve power transmission. When the electromagnet is de-energized, the driven disc is reset and separated from the friction plate under the action of the return spring.

[0014] This invention constructs a clutch transmission system with rapid response and precise control through electromagnetic clutch design. This clutch control based on electromagnetic principles not only achieves millisecond-level response speed, but also ensures the smoothness and reliability of torque transmission through the planar contact mode between the friction plate and the driven plate, completely avoiding the problems of complex structure and slow response of traditional hydraulic or mechanical cam clutches.

[0015] Furthermore, both the first adjusting rod and the second adjusting rod adopt a lead screw structure. Both the first transmission assembly and the second transmission assembly include a first transmission shaft. The first transmission shaft is connected to either the first driven pulley or the second driven pulley. The first transmission shaft drives the second transmission shaft to rotate through a meshing bevel gear set. The second transmission shaft drives the worm wheel to rotate through a worm gear. The worm wheel is equipped with a transmission nut. The transmission nut drives the first adjusting rod or the second adjusting rod to rise and fall.

[0016] Furthermore, the clutch assembly two includes a housing two, which is disposed on the upper crossbeam. An electromagnet two is disposed inside the housing two. The electromagnet two has a ring structure. A return spring two is disposed inside the electromagnet two. One end of the return spring two is connected to the housing two, and the other end of the return spring two is rotatably connected to the driven plate two. The driven plate two is located above the electromagnet two. An armature two is disposed on the end face of the driven plate two near the electromagnet two. The other end of the driven plate two can be in close contact with the friction plate two on the main shaft. An output shaft is disposed on the driven plate two. The lower end of the output shaft passes through the electromagnet two and the housing two. The lower end of the output shaft is connected to an inner spline sleeve. The inner spline sleeve is rotatably disposed on the lower part of the upper crossbeam. The inner spline sleeve is connected to the main drive screw.

[0017] This invention achieves a high degree of integration of the power transmission unit by adopting an axially stacked layout of the second annular electromagnet, the second return spring, and the second driven disc, thereby minimizing the radial space occupied by the entire clutch assembly while meeting the requirements for high torque transmission.

[0018] Furthermore, the elbow mechanism includes a hinged upper pull rod and a corner bracket. The upper end of the upper pull rod is hinged to the adjusting rod one or adjusting rod two. The corner bracket is respectively hinged to a lower pull rod and a main drive screw nut. The main drive screw nut is disposed on the main drive screw. The lower end of the lower pull rod is hinged to the slider.

[0019] Furthermore, the position sensor is a grating ruler displacement sensor.

[0020] Secondly, the present invention also provides a method for adjusting the mold mounting height of an elbow-type press, using the aforementioned elbow-type press, comprising the following steps:

[0021] S01: Determine whether the slider is horizontal based on the values ​​fed back by the two position sensors. If the horizontality of the slider exceeds the tolerance, level it by cooperating with the clutch assembly one, the adjustment rod one and the adjustment rod two. If no adjustment is needed, jump directly to S02.

[0022] S02: Calculate the adjustment displacement of the lower hinge points of adjusting rod one and adjusting rod two based on the mold height, and simultaneously drive adjusting rod one, adjusting rod two and main drive screw to rotate until the lower hinge points of adjusting rod one and adjusting rod two reach the set position based on the data fed back by the position sensor.

[0023] This invention employs a process flow of first leveling and then setting the height. By prioritizing the establishment of a horizontal slider reference, a precise spatial reference system is provided for subsequent mold height adjustments. This fundamentally avoids the cumulative errors caused by parameter distortion due to tilting. This sequence, through decoupling operations, eliminates mutual interference between leveling and height setting, improving adjustment efficiency and first-time success rate. It also ensures uniform force distribution during mold installation, enhancing both process accuracy and equipment safety and reliability. Through the synchronous movement of the main drive screw and adjusting rods one and two, the initial geometric relationship of the elbow mechanism remains unchanged when adjusting the mold height, i.e., the rod configuration remains constant. This fundamentally guarantees the stability of the slider motion curve and process capability, ensuring stamping accuracy.

[0024] As can be seen from the above technical solutions, the present invention has the following advantages:

[0025] This invention provides a toggle-type press and a method for adjusting the die height. By setting clutch assembly one and clutch assembly two between the main shaft and adjusting rod one, adjusting rod two, and main drive screw respectively, a highly integrated design is achieved, using the same drive motor to simultaneously complete die height adjustment and normal stamping operations. Compared with the independent servo motor drive unit and complex hydraulic buffer system in the prior art, this significantly simplifies the mechanical structure and reduces manufacturing costs and space occupation. By setting two position sensors and adopting an independent control structure of clutch module one and clutch module two between the main shaft and adjusting rod, real-time monitoring and independent precise adjustment of the position of the double-sided hinge point are achieved, effectively solving the problems of slider tilting and uneven load wear caused by the lack of leveling function in traditional presses. The electromagnetic clutch design constructs a clutch transmission system with rapid response and precise control. This clutch control based on electromagnetic principles not only achieves millisecond-level response speed, but also ensures the smoothness and reliability of torque transmission through the planar contact mode between the friction plate and the driven plate, completely avoiding the problems of traditional hydraulic or mechanical clutches. The mechanical cam clutch suffers from complex structure and slow response. By adopting an axially stacked layout of the annular electromagnet, return spring, and driven plate, the power transmission unit is highly integrated, minimizing the radial space occupied by the entire clutch assembly while meeting the requirements for high torque transmission. A process flow of leveling first, followed by height setting, is employed. By prioritizing the establishment of a horizontal slider reference, a precise spatial reference system is provided for subsequent mold height adjustments, fundamentally avoiding cumulative errors caused by parameter distortion under tilted conditions. This sequence, through decoupling operations, eliminates mutual interference between leveling and height setting, improving adjustment efficiency and one-time success rate, and ensuring uniform force distribution during mold installation. This enhances both process accuracy and the safety and reliability of equipment operation. Synchronous movement of the main drive screw and adjusting rods one and two ensures that the initial geometric relationship of the lever mechanism remains unchanged when adjusting the mold height, i.e., the lever configuration remains constant. This fundamentally guarantees the stability of the slider motion curve and process capability, ensuring stamping accuracy. Attached Figure Description

[0026] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0028] Figure 2 This is a schematic diagram of the assembly structure of clutch assembly 1, clutch assembly 2, transmission assembly 1, transmission assembly 2, adjusting rod 1, and adjusting rod 2 in Embodiment 1 of the present invention.

[0029] In the diagram, 3 is the toggle lever mechanism; 4 is the upper crossbeam; 5 is the slider; 11 is the drive motor; 12 is the reducer; 21 is the clutch assembly one; 22 is the transmission assembly one; 23 is the position sensor; 24 is the clutch assembly two; 25 is the transmission assembly two; 31 is the main drive screw; 32 is the main drive nut; 33 is the upper pull rod; 34 is the angle bracket; 35 is the lower pull rod; 211 is the clutch module one; 213 is the main shaft; 2111 is the housing one; 2112 is the electromagnet one; 2113 is the armature one; 2114 is the return spring one; 2115 is the friction plate one; 214 is the clutch module two; 215 is the driven plate one; 216 is the driven plate two; 2161 is the... Output shaft; 2121, Housing II; 2122, Electromagnet II; 2123, Armature II; 2124, Return spring II; 2125, Thrust bearing; 2126, Friction plate II; 221, Driving pulley I; 222, Synchronous belt I; 2221, External spline sleeve; 223, Driven pulley I; 224, Bevel gear set; 225, Driving pulley II; 226, Worm; 227, Worm wheel; 228, Adjusting rod I; 229, Adjusting rod II; 230, Driven pulley II; 231, Synchronous belt II; 233, Drive shaft I; 234, Drive shaft II; 235, Scale grating; 236, Grating reading head; 311, Internal spline sleeve. Detailed Implementation

[0030] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0031] Example 1

[0032] like Figure 1 and Figure 2As shown in the figure, this specific embodiment provides an elbow-type press, including an upper crossbeam 4. A main shaft 213 is rotatably mounted on the upper crossbeam 4 via bearings. The main shaft is connected to a drive motor 11 and a reducer 12. The main shaft 213 is connected to two elbow mechanisms 3 on both sides via a main drive screw 31 and a main drive nut 32. The two elbow mechanisms 3 are connected to sliders 5. This embodiment also includes an adjusting rod 1 228 and an adjusting rod 229. The adjusting rod 1 228 and the adjusting rod 229 are both vertically and vertically mounted on the upper crossbeam 4. The lower ends of the adjusting rod 1 228 and the adjusting rod 229 are respectively hinged to the corresponding elbow mechanism 3. The main shaft 213 realizes power transmission with the adjusting rod 1 228 and the adjusting rod 229 through a clutch assembly 21.

[0033] This invention achieves a highly integrated design by setting clutch components 21 between the main shaft 213 and the adjusting rod 228, adjusting rod 229, and main drive screw 31, respectively. This design enables the simultaneous completion of mold height adjustment and normal stamping operation using the same drive motor 11. Compared with the independent servo motor drive unit and complex hydraulic buffer system in the prior art, this invention greatly simplifies the mechanical structure and reduces manufacturing costs and space occupation.

[0034] The inherent dimensional deviations in the machining and assembly of the press slide 5 cannot be completely eliminated. Uneven wear of moving parts such as guide rails and hinge points due to uneven loading or lubrication during long-term operation, and asymmetric elastic deformation of the machine body structure under immense pressure, all contribute to the slide 5 not being able to maintain a horizontal position. Adjusting the mold height while the slide 5 is tilted, or adjusting the mold height when the slide 5 is not level, will trigger a series of chain problems: First, the mold height value set based on the tilt reference itself will be distorted, causing uneven line or point contact between the slide 5 and the mold when it reaches the bottom dead center. This will not only severely scratch the mold surface and reduce product forming quality, but will also generate enormous lateral forces during the stamping process. This can lead to abnormal wear of the guide rails and jamming of the slide 5, or even mold misalignment or breakage. Simultaneously, it will cause impact damage to the machine body and transmission mechanism, significantly shortening the equipment's service life and creating safety hazards. To solve this technical problem, such as... Figure 1 and Figure 2As shown, in this embodiment, a leveling function is added. Position sensors 23 are installed between the first adjusting rod 228 and the upper crossbeam 4, and between the second adjusting rod 229 and the upper crossbeam 4. The position sensors 23 can detect the position of the hinge point at the end of the first adjusting rod 228 or the second adjusting rod 229. The clutch assembly 21 includes a first clutch module 211 and a second clutch module 214. The main shaft 213 transmits power to the first adjusting rod 228 via the first clutch module 211, and to the second adjusting rod 229 via the second clutch module 214. Power transmission is achieved by using data from position sensor 23 to determine the levelness of slider 5. When adjustment is needed, the levelness of slider 5 is adjusted by independently controlling clutch module 1 211 and clutch module 214. With this setting, closed-loop control based on sensor feedback ensures that slider 5 maintains high flatness and verticality at any mold mounting height. Furthermore, the time-sharing control of the dual clutch modules enables asymmetrical adjustment of the height of the left and right elbow mechanisms 3, significantly improving the adaptability of the equipment to complex working conditions and effectively solving problems such as slider 5 tilting and uneven wear caused by the lack of leveling function in traditional presses.

[0035] Since the horizontal adjustment of slider 5 exceeds the tolerance, the mold mounting height value set based on the tilt datum will be distorted. Therefore, the horizontal adjustment of slider 5 and the mold mounting height adjustment need to be performed separately to avoid mutual interference. For this reason, as follows... Figure 1 and Figure 2 As shown, in this embodiment, a second clutch assembly 24 is also included. The second clutch assembly 24 is disposed between the main shaft 213 and the main drive screw 31. Through the second clutch assembly 24, the power transmission between the main shaft 213 and the main drive screw 31 can be disconnected during leveling, and leveling can be performed independently. When adjusting the mold height, the second clutch assembly 24 is engaged to realize power transmission. The initial geometric relationship of the elbow mechanism 3 remains unchanged, that is, the rod configuration remains unchanged, thereby fundamentally ensuring the stability of the slider 5 motion curve and process capability, and ensuring stamping accuracy.

[0036] like Figure 2As shown, in this embodiment, the main shaft 213 is also rotatably equipped with a first drive pulley 221 and a second drive pulley 225. The first drive pulley 221 transmits power to the main shaft 213 through the first clutch module 211, and the second drive pulley 225 transmits power to the main shaft 213 through the second clutch module 214. The first drive pulley 221 is connected to the first transmission assembly 22 through the first synchronous belt 222 and the first driven pulley 223. The first transmission assembly 22 is connected to the first adjusting rod 228, and the first transmission assembly 222 can drive the first adjusting rod 228 to rise and fall. The second drive pulley 225 is connected to the second transmission assembly 25 through the second synchronous belt 231 and the second driven pulley 230. The second transmission assembly 25 is connected to the second adjusting rod 229, and the second transmission assembly 25 can drive the second adjusting rod 229 to rise and fall.

[0037] like Figure 1 and Figure 2As shown, in this embodiment, both the first drive pulley 221 and the second drive pulley 225 are provided with external spline sleeves 2221. The external spline sleeves 2221 are rotatably mounted on the main shaft 213 via bearings. The clutch assembly 21 includes a housing 2111 and a friction plate 2115. The housing 2111 is connected to the upper crossbeam 4. A plurality of electromagnets 2112 are evenly arranged on the inner wall of the circumferential surface of the housing 2111. The friction plate 2115 is disposed on the main shaft 213. On 13, both the clutch module one 211 and the clutch module two 214 include a driven disc one 215. The two driven discs one 215 are respectively disposed on the upper and lower surfaces of the friction plate one 2115. The two driven discs one 215 can move axially along the corresponding outer spline sleeve 2221. A return spring one 2114 is provided between the driving pulley one 221 and the corresponding driven disc one 215, and between the driving pulley two 225 and the corresponding driven disc one 215. In this embodiment, the return spring 2114 is a disc spring, and the driven disc 215 is provided with an armature 2113 near the electromagnet 2112. When the armature 2113 is attracted by the corresponding electromagnet 2112, the driven disc 215 can be in close contact with the friction plate 2115. Power is transmitted through the driven disc 215 and the outer spline sleeve 2221 to the driving pulley 221 or the driving pulley 225, thus realizing power transmission. When the electromagnet 2112 is de-energized, the driven disc 215 is reset and separated from the friction plate 2115 under the action of the return spring 2114, and power transmission is no longer performed. The electromagnetic clutch design constructs a clutch transmission system with rapid response and precise control. This clutch control based on electromagnetic principles not only achieves millisecond-level response speed, but also ensures the smoothness and reliability of torque transmission through the planar contact mode between the friction plate and the driven disc, completely avoiding the problems of complex structure and slow response of traditional hydraulic or mechanical cam clutches.Furthermore, both the first adjusting rod 228 and the second adjusting rod 229 adopt a lead screw structure. Both the first transmission assembly 22 and the second transmission assembly 25 include a first transmission shaft 233, which is vertically mounted inside the upper crossbeam 4. A bearing is mounted on the first transmission shaft 233. The upper end of the first transmission shaft 233 is connected to either the first driven pulley 223 or the second driven pulley 230. The lower end of the first transmission shaft 233 drives the horizontally mounted second transmission shaft 229 via a meshing bevel gear set 224. 34 rotates, and the second transmission shaft 234 is supported by corresponding bearings. The second transmission shaft 234 is connected to the worm gear 226, which drives the worm wheel 227 to rotate. The worm gear 226 is rotatably mounted in the upper crossbeam 4 through corresponding bearings. The worm wheel 227 has a transmission nut inside, and the worm wheel 227 drives the transmission nut to rotate. The transmission nut drives the first adjusting rod 228 or the second adjusting rod 229 to rise or fall. The first adjusting rod 228 and the second adjusting rod 229 will drive the corresponding toggle mechanism 3 to rise or fall.

[0038] like Figure 2As shown, in this embodiment, the clutch assembly 24 includes a housing 2121, which is located on the upper crossbeam 4 below the housing 2111. An electromagnet 2122 is disposed inside the housing 2121. The electromagnet 2122 has a ring-shaped structure, and a return spring 2124 is disposed inside the electromagnet 2122. One end of the return spring 2124 is connected to the housing 2121, and the other end of the return spring 2124... Rotarily connected to the driven disk 216, the driven disk 216 is located above the electromagnet 2122. An armature 2123 is provided on the end face of the driven disk 216 near the electromagnet 2122. The other end of the driven disk 216 can be in close contact with the friction plate 2126 on the main shaft 213. An output shaft 2161 is provided on the driven disk 216, and the lower end of the output shaft 2161 passes through the electromagnet 2122 and the housing 2121. The lower end of the output shaft 2161 is connected to the inner spline sleeve 311, which is rotatably mounted on the lower part of the upper crossbeam 4. The lower part of the inner spline sleeve 311 is connected to the main drive screw 31. When the electromagnet 2122 is de-energized, the driven plate 216 is in contact with the friction plate 2126 under the action of the return spring 2124. Since a thrust bearing 2125 is provided between the return spring 2124 and the driven plate 2, the return spring 2124 rotates with the driven plate 2. The power of shaft 213 is transmitted to main drive screw 31 through driven plate 216, output shaft 2161, and inner spline sleeve 311, thereby realizing the lifting and lowering of main drive screw nut 32 and further transmitting the power to the elbow mechanism 3 on both sides; by adopting an axially stacked layout of annular electromagnet 2122, return spring 2124 and driven plate 216, the power transmission unit is highly integrated, minimizing the radial space occupation of the entire clutch assembly, while meeting the requirements of high torque transmission.

[0039] like Figure 1 As shown, in this embodiment, the elbow mechanism 3 includes a hinged upper pull rod 33 and a corner bracket 34. The upper end of the upper pull rod 33 is hinged to the adjusting rod 228 or the adjusting rod 229. The corner bracket 34 is respectively hinged to a lower pull rod 35 and a main drive screw nut 32. The main drive screw nut 32 is disposed on the main drive screw 31. The lower end of the lower pull rod 35 is hinged to the slider 5. Specifically, connecting rods are provided on both sides of the main drive screw nut 32, and the ends of the connecting rods are hinged to the corner bracket 34.

[0040] like Figure 1As shown, in this embodiment, the position sensor 23 is a grating ruler displacement sensor, which includes a scale grating 235 and a grating reading head 236. The grating reading head 236 is located at the hinge point of the first adjustment rod 228 or the second adjustment rod 229, and the scale grating 235 is fixed to the lower part of the upper crossbeam 4.

[0041] Example 2

[0042] This embodiment provides a method for adjusting the mold mounting height of an elbow-type press, using the elbow-type press of Embodiment 1, and includes the following steps:

[0043] S01: Determine whether the slider 5 is horizontal based on the values ​​fed back by the two position sensors 23. If the horizontality of the slider 5 exceeds the tolerance, leveling is performed by the clutch assembly 21, the adjustment rod 228 and the adjustment rod 229. If no adjustment is needed, proceed directly to S02.

[0044] S02: Calculate the adjustment displacement of the lower hinge points of adjusting rod 1 228 and adjusting rod 2 229 based on the mold height, and simultaneously drive adjusting rod 1 228, adjusting rod 2 229 and main drive screw 31 to rotate until the lower hinge points of adjusting rod 1 228 and adjusting rod 2 229 reach the set position based on the data fed back by position sensor 23.

[0045] This embodiment adopts a process flow of first leveling and then setting the height. By prioritizing the establishment of a horizontal reference for the slider 5, a precise spatial reference system is provided for subsequent mold height adjustment. This fundamentally avoids the cumulative error caused by parameter distortion in the tilted state. This sequence, through decoupling operation, eliminates the mutual interference between leveling and height setting, improves adjustment efficiency and one-time success rate, and ensures uniform force during mold installation. While improving process accuracy, it also enhances the safety and reliability of equipment operation. At the same time, through the synchronous movement of the main drive screw 31 and the adjusting rods 228 and 229, it is ensured that the initial geometric relationship of the elbow mechanism 3 remains unchanged when adjusting the mold height, that is, the rod system configuration remains unchanged. This fundamentally guarantees the stability of the slider 5 motion curve and process capability, and ensures stamping accuracy.

[0046] In S01, when the difference in readings between the two position sensors 23 exceeds the allowable tolerance, leveling is required. During leveling, the higher side can be lowered to align with the lower side, or the lower side can be raised to align with the higher side. This can be achieved by controlling the corresponding clutch modules to engage independently and accurately control the rotation direction of the drive motor 11. The transmission process is described in Embodiment 1 and will not be repeated here. By comparing the real-time feedback value of the moving position sensor 23 with the value of the stationary position sensor 23, the leveling termination position can be controlled.

[0047] In S02, the calculated adjustment displacement includes two parameters: the adjustment distance and the direction. The direction of the drive motor 11 is determined by the adjustment direction. The hinge point is judged to have reached the preset height by the data fed back in real time by the position sensor 23.

[0048] When this press is working, electromagnet 1 2112 and electromagnet 2 2122 are simultaneously de-energized, drive motor 11 drives main transmission screw 31 to rotate forward and backward, thereby driving two toggle mechanisms 3 to reciprocate, realizing the reciprocating stamping operation of slider 5.

[0049] As can be seen from the above specific embodiments, the present invention has the following beneficial effects:

[0050] 1. By setting clutch assembly 21 and clutch assembly 24 between the main shaft 213 and the adjusting rod 228, the adjusting rod 229 and the main drive screw 31 respectively, a highly integrated design is achieved to simultaneously complete the mold height adjustment and normal stamping operation using the same drive motor 11. Compared with the independent servo motor drive unit and complex hydraulic buffer system in the prior art, the mechanical structure is greatly simplified and the manufacturing cost and space occupied are reduced.

[0051] 2. By setting two position sensors 23 and adopting an independent control structure of clutch module 1 211 and clutch module 2 214 between the main shaft 213 and the adjusting rod, real-time monitoring and independent precise adjustment of the position of the double-sided hinge point are realized, which effectively solves the problems of slider 5 tilting and uneven load wear caused by the lack of leveling function in traditional presses.

[0052] 3. By setting the clutch component 24, the leveling and height adjustment operations are decoupled, eliminating the mutual interference between leveling and height setting, and improving adjustment efficiency and one-time success rate;

[0053] 4. An electromagnetic clutch design has been used to construct a clutch transmission system with rapid response and precise control. This clutch control based on electromagnetic principles not only achieves millisecond-level response speed, but also ensures the smoothness and reliability of torque transmission through the planar contact mode between the friction plate and the driven plate, completely avoiding the problems of complex structure and slow response of traditional hydraulic or mechanical cam clutches.

[0054] 5. By adopting an axially stacked layout of the annular electromagnet 2122, the return spring 2124 and the driven plate 2, the power transmission unit is highly integrated, minimizing the radial space occupied by the entire clutch assembly, while meeting the requirements of high torque transmission.

[0055] 6. The process of first leveling and then setting the height is adopted. By prioritizing the establishment of a horizontal reference for the slider 5, a precise spatial reference system is provided for subsequent mold height adjustment. This fundamentally avoids the cumulative error caused by parameter distortion in the tilted state. This sequence, through decoupling operation, eliminates the mutual interference between leveling and height setting, improves adjustment efficiency and one-time success rate, and ensures uniform force during mold installation. While improving process accuracy, it also enhances the safety and reliability of equipment operation. Through the synchronous movement of the main drive screw 31 and the adjusting rods 228 and 229, the initial geometric relationship of the elbow mechanism 3 remains unchanged when adjusting the mold height, that is, the rod configuration remains unchanged. This fundamentally guarantees the stability of the slider 5 motion curve and process capability, ensuring stamping accuracy.

[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A toggle-type press, comprising an upper crossbeam (4), on which a main shaft (213) is rotatably mounted, the main shaft (213) being connected to a drive motor (11), the main shaft (213) being connected to two toggle mechanisms (3) via a main transmission screw (31), and the two toggle mechanisms (3) being connected to sliders (5), characterized in that, Also includes: Adjusting rod one (228) and adjusting rod two (229) are both raised and lowered on the upper crossbeam (4). The lower ends of adjusting rod one (228) and adjusting rod two (229) are respectively hinged to the corresponding elbow mechanism (3). The main shaft (213) realizes the power transmission with adjusting rod one (228) and adjusting rod two (229) through clutch assembly one (21). The clutch assembly (21) includes a clutch module (211) and a clutch module (214). The main shaft (213) transmits power through the clutch module (211) and the adjusting rod (228). The main shaft (213) transmits power through the clutch module (214) and the adjusting rod (229). It also includes a second clutch assembly (24), which is disposed between the main shaft (213) and the main drive screw (31).

2. The elbow-type press as described in claim 1, characterized in that, Position sensors (23) are provided between the first adjusting rod (228) and the upper crossbeam (4) and between the second adjusting rod (229) and the upper crossbeam (4). The position sensors (23) can detect the position of the hinge point at the end of the first adjusting rod (228) or the second adjusting rod (229).

3. The elbow-type press as described in claim 2, characterized in that, The main shaft (213) is also rotatably equipped with a first driving pulley (221) and a second driving pulley (225). The first driving pulley (221) transmits power to the main shaft (213) through the first clutch module (211), and the second driving pulley (225) transmits power to the main shaft (213) through the second clutch module (214). The first driving pulley (221) is connected to the first transmission assembly (213) through the first synchronous belt (222) and the first driven pulley (223). 22) Connection, the first transmission component (22) is connected to the first adjusting rod (228), the first transmission component (22) can drive the first adjusting rod (228) to rise and fall, the second driving pulley (225) is connected to the second transmission component (25) through the second synchronous belt (231) and the second driven pulley (230), the second transmission component (25) is connected to the second adjusting rod (229), the second transmission component (25) can drive the second adjusting rod (229) to rise and fall.

4. The elbow-type press as described in claim 3, characterized in that, Both the first drive pulley (221) and the second drive pulley (225) are provided with external spline sleeves (2221) on their end faces. The external spline sleeves (2221) are rotatably mounted on the main shaft (213). The first clutch assembly (21) includes a housing (2111) and a friction plate (2115). Multiple electromagnets (2112) are uniformly arranged inside the housing (2111). The friction plate (2115) is mounted on the main shaft (213). Both the first clutch module (211) and the second clutch module (214) include driven discs (215). The two driven discs (215) are respectively mounted on the upper and lower surfaces of the friction plate (2115). The two driven discs (215) can move along the corresponding external spline sleeves. The spline sleeve (2221) moves axially. A return spring (2114) is provided between the first driving pulley (221) and the corresponding driven disk (215), and between the second driving pulley (225) and the corresponding driven disk (215). An armature (2113) is provided in the area of ​​the driven disk (215) near the electromagnet (2112). When the armature (2113) is attracted by the corresponding electromagnet (2112), the driven disk (215) can be tightly attached to the friction plate (2115) to realize power transmission. When the electromagnet (2112) is de-energized, the driven disk (215) is reset and separated from the friction plate (2115) under the action of the return spring (2114).

5. The elbow-type press as described in claim 4, characterized in that, Both the first adjusting rod (228) and the second adjusting rod (229) adopt a lead screw structure. Both the first transmission assembly (22) and the second transmission assembly (25) include a first transmission shaft (233). The first transmission shaft (233) is connected to the first driven pulley (223) or the second driven pulley (230). The first transmission shaft (233) drives the second transmission shaft (234) to rotate through a meshing bevel gear set (224). The second transmission shaft (234) drives the worm wheel (227) to rotate through a worm (226). The worm wheel (227) is provided with a transmission nut inside. The transmission nut drives the first adjusting rod (228) or the second adjusting rod (229) to rise and fall.

6. The toggle-lever press as described in any one of claims 3-5, characterized in that, The clutch assembly two (24) includes a housing two (2121), which is mounted on the upper crossbeam (4). An electromagnet two (2122) is installed inside the housing two (2121). The electromagnet two (2122) has a ring structure. A return spring two (2124) is installed inside the electromagnet two (2122). One end of the return spring two (2124) is connected to the housing two (2121), and the other end is rotatably connected to the driven plate two (216). The driven plate two (216) is located above the electromagnet two (2122). An armature (2123) is provided on the end face near the electromagnet (2122). The other end of the driven disk (216) can be in close contact with the friction plate (2126) on the main shaft (213). An output shaft (2161) is provided on the driven disk (216). The lower end of the output shaft (2161) passes through the electromagnet (2122) and the housing (2121). The lower end of the output shaft (2161) is connected to the inner spline sleeve (311). The inner spline sleeve (311) is rotatably provided on the lower part of the upper crossbeam (4). The inner spline sleeve (311) is connected to the main drive screw (31).

7. The elbow-type press as described in claim 6, characterized in that, The elbow lever mechanism (3) includes a hinged upper pull rod (33) and a corner bracket (34). The upper end of the upper pull rod (33) is hinged to the first adjusting rod (228) or the second adjusting rod (229). The corner bracket (34) is hinged to a lower pull rod (35) and a main drive nut (32). The main drive nut (32) is mounted on the main drive screw (31). The lower end of the lower pull rod (35) is hinged to the slider (5).

8. The elbow-type press as described in claim 2, characterized in that, The position sensor (23) is a grating ruler displacement sensor.

9. A method for adjusting the mold mounting height of an elbow-type press, characterized in that, The use of the toggle-type press as described in claim 7 includes the following steps: S01: Determine whether the slider (5) is horizontal based on the values ​​fed back by the two position sensors (23). If the horizontality of the slider (5) exceeds the tolerance, then level it by cooperating with the clutch assembly (21), the adjustment rod (228) and the adjustment rod (229). If no adjustment is needed, jump directly to S02. S02: Calculate the adjustment displacement of the lower hinge point of adjustment rod 1 (228) and adjustment rod 2 (229) according to the mold height, and drive adjustment rod 1 (228), adjustment rod 2 (229) and main drive screw (31) to rotate until the lower hinge point of adjustment rod 1 (228) and the lower hinge point of adjustment rod 2 (229) reach the set position according to the data fed back by position sensor (23).

Images