Heavy hydraulic bending machine slider moving assembly

Abstract

The application discloses a heavy hydraulic bending machine sliding block moving assembly and belongs to the technical field of forging presses. The heavy hydraulic bending machine sliding block moving assembly comprises a flexible connecting structure, a front and rear guide rail pair and a left and right guide rail pair. In the flexible connecting structure, a convex ball seat and a concave ball seat are movably attached through a spherical surface, and the parameterized pre-tightening design of a double gap sleeve and a disc spring assembly is used to realize the balanced flexible connection between the sliding block and the piston. The front and rear guide rail pair and the left and right guide rail pair both adopt the structure that a slant rail seat is matched with the inclined surface of a slant rail piece, and are supplemented by a multi-dimensional fine adjustment system composed of positioning flat pins, top screws and tension screws. The application effectively isolates the eccentric load impact through the flexible connection and protects the oil cylinder. Meanwhile, the front and rear guide rail pairs and the left and right guide rail pairs can realize high-precision, convenient and independent gap fine adjustment, and are self-locked after adjustment, so that the positioning precision, motion stability and eccentric load resistance of the large bending machine sliding block are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of forging and pressing machine tool technology, and relates to a sliding block moving assembly for a heavy-duty hydraulic bending machine. For the large sliding block of a large hydraulic bending machine, it ensures the flexible connection between the sliding block and the piston rod while maintaining positioning accuracy, as well as the movement accuracy of the sliding block in the left and right and front and back directions and the fine adjustment of the guide rail clearance, so that the sliding block can better adapt to the working conditions of the large bending machine. Background Technology

[0002] In the market, the diversification of large parts manufactured by large hydraulic bending machines and the increasingly higher requirements for precision have placed higher demands on the flexible positioning accuracy, motion accuracy, and motion stability of the large slider, which is the actuator for sheet metal forming.

[0003] (1) Connection between slider and piston rod: One type is that the left and right shoulder steps of the slider are directly and rigidly connected to the output end face of the piston rod through threads. This connection method directly transmits the accuracy of the oil cylinder and piston rod to the slider. The slider moves up and down under the copying accuracy. When the slider moves down for working and the formed part is subjected to eccentric load in the front-back or left-right direction, the eccentric load will be transmitted to the piston rod and oil cylinder, which will cause the left and right oil cylinders to be out of sync or the oil cylinder assembly to be damaged, resulting in oil leakage, or even unstable part accuracy.

[0004] Another type is a flexible connection with very low flexibility but high stiffness, which cannot be precisely controlled. The left and right shoulder steps of the slider and the piston rod output end part use spherical contact and are pre-tightened with a large, high-stiffness butterfly spring. Because the large butterfly spring has high stiffness, precise pre-tightening cannot be achieved, so it is essentially a rigid connection.

[0005] (2) Guide rail pair clearance adjustment: Traditional large bending machines commonly use front and rear and left and right guide rail pairs on the slider. Rectangular front and rear guide rail seats are installed on the vertical surfaces of the left and right frames of the bending machine. These guide rail seats maintain a suitable clearance with the guide rail plates in both the front-rear and left-right directions. The front and rear guide rail seats can only be finely adjusted in the front-rear direction; the left and right guide rail adjustment is achieved by finely adjusting and locking the left and right guide rail seats mounted on the slider using set screws and draw screws. Left and right guide rail plates are installed on the left and right guide rail seats, contacting one side of the front and rear guide rail seats to form the left and right guide rail pairs. Front and rear guide rail plates are installed at specific positions in the front-rear direction of the slider, contacting the other side of the front and rear guide rail seats to form the front and rear guide rail pairs. Disadvantages: Poor guide rail pair rigidity, poor motion accuracy, and poor motion stability. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A heavy-duty hydraulic bending machine slide block moving assembly includes:

[0008] The flexible connection structure includes a slider shoulder, which is fixedly mounted on the slider. A convex ball seat is movably fitted on the slider shoulder. A concave ball seat is movably mounted on the top of the convex ball seat, and the contact surface between the two is a spherical surface. The concave ball seat is connected to the piston end, and the concave ball seat and the slider shoulder are connected by a disc spring assembly.

[0009] The front and rear guide rail pair includes mounting plates installed on the front and rear sides of the left and right ends of the slider. The mounting plates are equipped with front and rear inclined rail seats and front and rear inclined rail components. The front and rear inclined rail seats and front and rear inclined rail components are in contact with each other and the contact surfaces are inclined. Front and rear copper rail plates are installed on the side of the front and rear inclined rail components that is away from the front and rear inclined rail seats. The distance between the front and rear inclined rail components and the mounting plates can be changed by adjusting the position of the front and rear inclined rail seats on the mounting plates.

[0010] The left and right guide rail assembly includes an L-shaped base plate installed at the center of the left and right ends of the slider. The side of the L-shaped base plate facing away from the slider has two mutually perpendicular precision surfaces, a first precision surface and a second precision surface. The left and right inclined rail components are attached to the first precision surface, and the left and right inclined rail seats are attached to the second precision surface. The first precision surface has two sets of screw holes. One set of screw holes is used to install screws for the left and right inclined rail components to tighten or loosen them. The other set is used to install screws for the left and right inclined rail seats to tighten or loosen them without contact. The second precision surface has a semi-open slot for installing the left and right inclined rail tightening screws. The left and right copper rail plates are installed on the side of the left and right inclined rail components facing away from the second precision surface.

[0011] In the aforementioned heavy-duty hydraulic bending machine slider moving assembly, the convex ball seat is provided with a stepped hole, and a double-gap sleeve is movably fitted inside the stepped hole. The double-gap sleeve has a small end and a large end. The length of the small end of the double-gap sleeve is greater than the depth of the small hole of the stepped hole, and the cross-sectional width is less than the cross-sectional width of the small hole of the stepped hole. A convex ball stud is inserted into the double-gap sleeve and screwed into the slider shoulder. After the convex ball stud presses the double-gap sleeve, the convex ball seat moves appropriately to form a flexible fit with the concave ball seat above it.

[0012] In the aforementioned heavy-duty hydraulic bending machine slider moving assembly, the concave ball seat has two circumferentially symmetrical stepped holes with completely equal step surfaces from top to bottom, and the disc spring assembly is installed in the stepped holes.

[0013] In the aforementioned heavy-duty hydraulic bending machine slider moving assembly, the disc spring assembly includes a preload pin, a sliding washer, and a preload disc spring. The preload pin passes through the preload disc spring and the sliding washer in sequence and is screwed into the slider shoulder. The middle part of the preload pin has a precision outer circle and a clearance fit with the slider shoulder. The outer diameter and inner diameter of the sliding washer are respectively left with gaps with the inner diameter of the stepped hole and the outer diameter of the preload pin. The two ends of the sliding washer are smooth and can slide freely to a certain extent when the slider is under eccentric load.

[0014] In the aforementioned heavy-duty hydraulic bending machine slide block moving assembly, the concave ball seat is provided with a pulse oil inlet hole, and the concave ball seat is provided with an upper oil hole connected to the pulse oil inlet hole. The convex ball seat is provided with a lower oil hole connected to the upper oil hole. Through the upper oil hole and the lower oil hole, lubricating oil is transmitted to the mating surfaces of the concave ball seat and the convex ball seat, and between the convex ball seat and the sliding surface of the slide block shoulder. The top of the concave ball seat is provided with a groove that matches the boss at the piston end.

[0015] In the aforementioned heavy-duty hydraulic bending machine slider moving assembly, the front and rear inclined rail seats fix the mounting plate to the slider by front and rear inclined rail screws. The front and rear inclined rail seats are provided with small platforms. The sides of the small platforms are provided with waist-shaped grooves and screw holes spaced apart. Left and right tension screws are inserted in the waist-shaped grooves, and left and right set screws are installed in the screw holes. The left and right set screws and left and right tension screws are spaced apart.

[0016] In the aforementioned heavy-duty hydraulic bending machine slider moving assembly, the front and rear inclined rail seats are provided with countersunk holes, which are perpendicular to the mounting plate and are used to install the front and rear inclined rail screws. The right-angled bottom surfaces of the front and rear inclined rail seats are attached to the side wall of the mounting plate. The inclined surfaces of the front and rear inclined rail seats and the mounting plate are provided with corresponding waist-shaped holes, and the front and rear inclined rail tensioning screws are inserted into the waist-shaped holes for connection with the front and rear inclined rail components.

[0017] In the aforementioned heavy-duty hydraulic bending machine slider moving assembly, the front and rear inclined rail seats, slider, and mounting plate are provided with corresponding precision holes. Positioning flat pins are installed in the precision holes and are fixed to the slider by flat pin screws. The end of the positioning flat pin away from the slider is provided with a large flat square and the end closer to the slider is provided with a small flat square. The front and rear inclined rails are provided with waist-shaped guide grooves that slide with the large flat square, and the small flat square is positioned and installed on the slider.

[0018] In the aforementioned heavy-duty hydraulic bending machine slider moving assembly, the left and right inclined rails are provided with front-to-back stepped openings, which are used to install screws on the left and right inclined rails.

[0019] In the aforementioned heavy-duty hydraulic bending machine slider moving assembly, the left and right inclined rail seats are provided with front-to-back stepped openings, front-to-back screw holes, and left-to-right waist-shaped openings. Left and right inclined rail seat screws connected to the L-shaped base plate are passed through the stepped openings. Front and rear set screws with their ends abutting against the precision surface are installed in the screw holes. Left and right inclined rail tensioning screws are inserted in the waist-shaped openings for connecting to the left and right inclined rail components.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This application utilizes the adaptive fit of the spherical surfaces of the convex and concave ball seats, combined with the axial and radial floating clearances provided by the double-gap sleeve, to enable the slider to automatically and slightly translate or deflect during preload adjustment and under off-center load. This transforms the previously difficult-to-control, qualitative operation into a controllable and quantitative operation. It effectively isolates the rigid impact of the off-center load torque on the piston and cylinder, avoiding cylinder asynchrony or oil leakage caused by off-center load. Furthermore, traditional two-set large disc springs have high preload forces, leading to difficulties in preload and poor operability. This application, however, utilizes multiple evenly distributed small disc spring assemblies, avoiding these drawbacks. Preload is relatively convenient, precise, and controllable. Combined with a parameterized operation method of "measuring the distance from the pin end face to the concave ball seat end face before and after preload," it achieves precise and evenly distributed control of the preload force under high tonnage, solving the industry problem of inaccurate preload control with traditional high-stiffness disc springs and ensuring the consistency and balance of the flexible connection at both ends of the slider.

[0022] 2. In this application, the front and rear inclined rail seats and the front and rear inclined rail components are precisely fitted together via right-angled trapezoidal inclined surfaces in the front and rear guide rail pairs. Through the non-perpendicular inclined surface design of the countersunk hole and the oblong hole, combined with the coordinated operation of the left and right set screws and the left and right tensioning screws ("one push, one pull"), the gap between the front and rear copper rail plates and the frame guide rails can be quickly and accurately adjusted without disassembling any components. Simultaneously, the sliding fit between the large flat square of the positioning pin and the oblong guide groove ensures the guiding accuracy of the inclined rail components when they move along the inclined surface, and also serves as a fall prevention limit, significantly improving the bending machine's resistance to eccentric loads and its smooth operation in the front and rear directions.

[0023] 3. In this application, the left and right guide rail pairs are independently mounted on the left and right inclined rail components and the left and right inclined rail seats via precision surfaces one and two on the L-shaped base plate. Utilizing the waist-shaped groove characteristics of the stepped opening, and in conjunction with the reverse pushing principle of the left and right inclined rail seat screws and the front and rear set screws, the lateral clearance between the left and right copper rail plates and the column guide rail can be adjusted independently without disassembling the machine. The operation is simple, and the adjusted position is locked by the front and rear set screws, ensuring reliable anti-loosening. This structure effectively solves the problems of poor rigidity and easy loosening after adjustment in traditional left and right guide rails.

[0024] 4. The front and rear guide rail pairs, left and right guide rail pairs, and flexible connection structure of this application are all assembled independently in a modular manner, and each has its own independent precision benchmark. Each adjustment link is designed with a clear locking mechanism (steel wire through top screw, thickened washer tensioning, etc.) to ensure that the adjusted precision can be maintained for a long time under heavy loads and high-frequency vibrations, which greatly extends the equipment maintenance cycle and the service life of core components.

[0025] 5. This application achieves forced and continuous lubrication of the spherical mating surface and the planar sliding surface by setting pulse oil inlet holes, upper oil holes and lower oil holes inside the concave ball seat and the convex ball seat, which effectively reduces the frictional resistance of the flexible connection structure under fretting wear and improves the wear resistance and response sensitivity of the mating surface. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the slider moving assembly of this application.

[0027] Figure 2 This is a front view of the slider moving assembly of this application.

[0028] Figure 3 This is a cross-sectional view of the slider moving assembly of this application.

[0029] Figure 4 This is a cross-sectional view of the flexible connection structure of this application.

[0030] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0031] Figure 6 for Figure 4 A magnified view of a section at point B in the middle.

[0032] Figure 7 for Figure 2 Cross-sectional view along the AA direction.

[0033] Figure 8 This is a cross-sectional view of the front and rear guide rail pairs of this application.

[0034] Figure 9 This is a cross-sectional view of the left and right guide rail pairs of this application.

[0035] Figure 10 for Figure 2 Cross-sectional view along the DD direction.

[0036] Figure 11 for Figure 2 Cross-sectional view along the GG direction.

[0037] Figure 12 for Figure 2 Cross-sectional view along the EE direction.

[0038] Figure 13 for Figure 2 Cross-sectional view along the FF direction.

[0039] Figure 14 This is a structural diagram of the positioning pin.

[0040] Figure 15 This is a structural diagram of the front and rear inclined rail seats.

[0041] Figure 16 This is a structural diagram of the front and rear inclined rail components.

[0042] Figure 17 This is a diagram showing the positional relationship between the left and right inclined rail components and the left and right inclined rail seats.

[0043] Figure 18 This is a structural diagram of the left and right inclined rail components.

[0044] In the diagram: 10. Slider; 11. Slider shoulder; 12. Convex ball seat; 121. Convex ball stud; 122. Double clearance sleeve; 123. Lower oil hole; 13. Concave ball seat; 131. Preload pin; 132. Sliding pad; 133. Preload disc spring; 134. Upper oil hole; 20. Piston; 30. Mounting plate; 31. Front and rear inclined rail seats; 32. Front and rear inclined rail components; 321. Waist-shaped guide groove; 33. Front and rear copper rail plates; 34. 35. Left and right tensioning screws; 36. Left and right set screws; 37. Front and rear inclined rail screws; 38. Front and rear inclined rail tensioning screws; 39. Positioning flat pins; 40. Flat pin screws; 41. L-shaped base plate; 42. Left and right inclined rail components; 43. Left and right inclined rail seats; 44. Stepped opening; 45. Front and rear set screws; 46. Left and right inclined rail component screws; 47. Left and right inclined rail seat screws; 48. Left and right inclined rail tensioning screws; 49. Left and right copper rail plates. Detailed Implementation

[0045] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0046] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] like Figure 1 As shown, a heavy-duty hydraulic bending machine slider moving assembly includes a flexible connection structure, front and rear guide rail pairs, and left and right guide rail pairs.

[0048] Among them: such as Figures 2 to 6 As shown, the flexible connection structure includes a slider shoulder 11, which is fixedly mounted on the slider 10. A precision convex ball seat 12 is freely fitted on the slider shoulder 11. A precision concave ball seat 13 is movably mounted on the top of the convex ball seat 12, and the contact surface between the two is a spherical surface. The top of the concave ball seat 13 is provided with a precision countersunk groove that matches the boss at the end of the piston 20 for centering and is fastened by a concave ball screw 14. The concave ball seat 13 and the slider shoulder 11 are connected by a disc spring assembly.

[0049] The convex ball seat 12 is provided with multiple sets of stepped holes evenly distributed on it. A double-gap sleeve 122 is movably fitted inside each stepped hole. The double-gap sleeve 122 has a small end and a large end, with the large end at the top and the small end at the bottom. The length of the small end of the double-gap sleeve 122 is greater than the depth of the stepped hole, and its cross-sectional width is less than the cross-sectional width of the stepped hole. There is a height difference between the bottom of the large end and the top surface of the stepped hole, which is the axial clearance of the convex ball seat 12. The radius of the stepped holes evenly distributed on the convex ball seat 12 differs from the outer radius of the small end of the double-gap sleeve 122, which is the radial clearance of the convex ball seat 12. A convex ball stud 121 is inserted into the double-gap sleeve 122 and screwed into the slider shoulder 11. After the convex ball stud 121 presses against the double-gap sleeve 122, the convex ball seat 12 shifts appropriately, forming a flexible fit with the concave ball seat 13 above it.

[0050] The concave ball seat 13 has two circumferentially symmetrical stepped holes with completely equal step surfaces from top to bottom, and the disc spring assembly is installed in the stepped holes;

[0051] The disc spring assembly includes a preload pin 131, a sliding washer 132, and a preload disc spring 133. The preload pin 131 passes through the preload disc spring 133 and the sliding washer 132 sequentially and screws into the slider shoulder 11. The middle part of the preload pin 131 has a precision outer diameter that fits with the slider shoulder 11 with a clearance, and it is screwed in until the step locks. For the same slider 10, the concave ball seat 13 must have equal thickness and the depth of the evenly distributed step holes must be equal to ensure that the subsequent preload parameters are controllable and consistent. Multiple sets of preload disc springs 133 are evenly distributed, and their model selection is based on the accurate calculation of preload force and deformation, requiring easy force output for preload operation. The outer diameter and inner diameter of the sliding washer 132 leave gaps with the inner diameter of the step hole and the outer diameter of the preload pin 131, respectively. The two ends of the sliding washer 132 are smooth, allowing for moderate free sliding when the slider 10 is under off-center load.

[0052] Before pre-tightening, measure and record the distance from the upper end face of the pre-tightening pin 131 to the upper end face of the concave ball seat 13. Pre-tighten each pre-tightening point symmetrically according to the calculated pre-tightening amount, ensuring the pre-tightening amount is evenly distributed. Measure and record the distance from the upper end face of the pre-tightening pin 131 to the upper end face of the concave ball seat 13 at each pre-tightening point. The difference between these two distances is the pre-tightening amount. This pre-tightening amount has a one-to-one calculation function relationship with the pre-tightening force. This achieves parametric control of the flexible connection, making it easy to operate and ensuring balance at each point. This results in consistent and balanced flexible connections at both ends of the slide block of a large bending machine.

[0053] The concave ball seat 13 is provided with a pulse oil inlet hole 135 and an upper oil hole 134 connected to the pulse oil inlet hole. The convex ball seat 12 is provided with a lower oil hole 123 connected to the upper oil hole 134. Through the upper oil hole 134 and the lower oil hole 123, lubricating oil is transferred to the mating surfaces of the concave ball seat 13 and the convex ball seat 12, and between the sliding surfaces of the convex ball seat 12 and the slider shoulder 11.

[0054] Among them, such as Figure 7 and Figure 8 , Figure 10 , Figure 11 As shown, the front and rear guide rail pair includes mounting plates 30 installed on the front and rear sides of the left and right ends of the slider 10. The mounting plates 30 are vertically mounted, and their cross-section is bracket-shaped, with three precision planes: top, bottom, and side. These planes are kept as perpendicular or parallel as possible to the precision plane reference of the slider assembly, determining the slider's motion accuracy and smoothness. Front and rear inclined rail seats 31 and front and rear inclined rail components 32 are installed inside the mounting plates 30. The front and rear inclined rail seats 31 and the front and rear inclined rail components 32 are in contact, and the contact surfaces are inclined. Front and rear copper rail plates 33 are installed on the side of the front and rear inclined rail components 32 opposite to the front and rear inclined rail seats 31. Adjusting the position of the front and rear inclined rail seats 31 on the mounting plates 30 changes the distance between the front and rear inclined rail components 32 and the mounting plates 30.

[0055] like Figure 15 As shown, the front inclined rail seat 31 is a right-angled trapezoidal wedge-shaped precision workpiece with a boss. Its inclined surface and the two adjacent side surfaces, as well as the right-angled bottom surface that is inclined relative to it, are provided with precise perpendicularity, positional accuracy and dimensional tolerance. The large end of the front and rear inclined rail seats is provided with a small platform. The side of the small platform is provided with a waist-shaped groove and screw holes are provided at intervals. Left and right tension screws 34 are inserted in the waist-shaped groove, and left and right set screws 35 are installed in the screw holes. The left and right set screws 35 and the left and right tension screws 34 are distributed at intervals.

[0056] The front and rear inclined rail seats 31 fix the mounting plate 30 to the slider 10 by the front and rear inclined rail screws 36. The front and rear inclined rail seats 31 are provided with countersunk holes, which are set perpendicular to the mounting plate 30 and are used to install the front and rear inclined rail screws 36. The right-angled bottom surface of the front and rear inclined rail seats 31 is attached to the side wall of the mounting plate 30. It should be noted that this set of countersunk holes is not perpendicular to the inclined plane, but perpendicular to the right-angled bottom surface of the inclined plane. The size and position coordinates are obtained by projection mapping from the right-angled bottom surface. The design reference is the right-angled bottom surface.

[0057] The inclined surfaces of the front and rear inclined rail seats 31 and the base plates of the mounting plate 30 and the slider 10 are provided with corresponding waist-shaped holes. The front and rear inclined rail tensioning screws 37 are inserted into the waist-shaped holes for connection with the front and rear inclined rail components 32. The front and rear inclined rail tensioning screws 37 can be adjusted left and right inside them. The front and rear inclined rail tensioning screws 37 will tighten and fix the front and rear inclined rails 2, which are attached to the inclined surfaces, loosen during fine adjustment but are tightened during operation.

[0058] The front and rear inclined rail seats 31, slider 10, and mounting plate 30 are equipped with corresponding precision holes. Positioning pins 38 are installed within these precision holes. The cross-sectional dimensions of the positioning pins 38 are identical to the dimensions of the precision holes on the front and rear inclined rail seats 31, differing only in the positive or negative tolerance values. The positioning pins 38 position the front and rear inclined rail seats 31 on the mounting plate 30 and the base plate of the slider 10 (over-positioning). The axes of the various design elements described above are not perpendicular to the inclined plane, but rather perpendicular to the right-angled base surface facing the inclined plane. The dimensional coordinates are obtained by projection mapping from the right-angled base surface. The design datum is the right-angled base surface.

[0059] The two sides of the front and rear inclined rail seats 1 are fitted with a small clearance between the openings of the mounting plate 30. The precision of the openings is transmitted to the two sides of the front and rear inclined rail seats 1, thereby positioning the direction and position of the inclined surface.

[0060] The positioning flat pin 38 is fixed to the slider 10 by the flat pin screw 39. The end of the positioning flat pin 38 away from the slider 10 is provided with a large flat square and the end closer to the slider 10 is provided with a small flat square. The front and rear inclined rails 32 are provided with waist-shaped guide grooves 321 that slide with the large flat square. The small flat square is positioned and installed on the slider 10.

[0061] like Figure 14 As shown, the overall cross-section of the positioning flat pin 38 is T-shaped. The large square end (large flat end) is used to limit the vertical installation of the front and rear inclined rail components 32 and prevent them from falling outwards. The small end of the positioning flat pin 38 is designed with a flat end symmetrical to the precision outer circle. The positioning flat pin 38 is fastened to the mounting plate 30 and the base plate of the slider 10 by positioning flat pin screws 39 that are recessed into the inner hole. The flat ends of the three positioning flat pins 38, once installed, serve as guide rails for the front and rear inclined rail components 32 to move along the inclined surfaces of the front and rear inclined rail seats 31, because the front and rear inclined rail components 32 have three corresponding precision waist-shaped grooves. During assembly, the positioning flat pin 38 passes through the front and rear inclined rail components 32 and the front and rear inclined rail seats 31, positioning and fastening it to the slider 10.

[0062] like Figure 16 As shown, the front and rear inclined rail components 32 are right-angled trapezoidal components with an inclination that is exactly equal to that of the front and rear inclined rail bases 31. When the inclined surfaces of the two right-angled trapezoidal components are in the same direction and fit together, their respective right-angled bases are completely parallel. This precision can be achieved by machining using a clamping method with mutual references. The right-angled bases of the front and rear inclined rail components 2 are designed with arrayed screw holes for mounting the front and rear copper rail plates 33, which are aligned with the front and rear guide rails 9 installed on the left and right gantry columns to form a front and rear guide rail pair.

[0063] The right-angled bottom surface of the front and rear inclined rail components 32 is also designed with three precision stepped waist-shaped grooves that penetrate the inclined surface and correspond one-to-one with the three precision positioning holes on the front and rear inclined rail seats 31 and the slider 10. The small end of the positioning flat pin 38 is precision-fitted with the three precision positioning holes on the front and rear inclined rail seats 31 and the slider 10, and the precision large flat pin is clearance-fitted with the three precision waist-shaped grooves on the front and rear inclined rail components 32. The large flat pin is the guide rail for the front and rear inclined rails 2 to move along the inclined surface. The end face of the large flat pin is kept at a certain distance from the right-angle end face of the precision waist-shaped groove to ensure that the front and rear inclined rail components 32 do not interfere when they move along the inclined surface, and also to prevent the front and rear inclined rail components 32 from falling when the front and rear inclined rail tension screws 37 are loosened, because the front and rear inclined rail components 32 are installed vertically on the side.

[0064] The inclined surfaces of the front and rear inclined rails 2 are arranged in two columns of seven rows, and are equipped with tension screw holes for tightening the front and rear inclined rail components 32 by means of tension screws 37, so that their inclined surfaces are precisely fitted with the inclined surfaces of the front and rear inclined rail seats 31. It should be noted that the tension screw holes arranged in two columns of seven rows on the inclined surfaces are not perpendicular to the inclined surfaces, but rather perpendicular to the right-angled base surfaces facing the inclined surfaces. The dimensional coordinates are obtained by projection mapping from the right-angled base surfaces.

[0065] The aforementioned mounting plate 30 and the base plate of the slider 10 are provided with corresponding waist-shaped grooves. Due to manufacturing process reasons, the waist-shaped grooves on the mounting plate 30 and the base plate of the slider 10 are formed by oxygen cutting. To avoid misalignment, the size of the waist-shaped grooves is intentionally enlarged, as they only serve to pass through the front and rear inclined rail tensioning screws 37. Therefore, during assembly, a thickened washer with a larger diameter needs to be added to the front and rear inclined rail tensioning screws 37 in order to transfer the tensioning force to the main plate of the slider.

[0066] When fine-tuning the clearance between the front and rear guide rails is required, first loosen (generally without disengaging the threads) the front and rear inclined rail tension screws 37. The front and rear inclined rail components 32 will then separate from the inclined surface. Next, adjust the left and right set screws 35 and tension screws 34 by pushing and pulling. Finally, tighten the front and rear inclined rail tension screws 37 to complete the clearance adjustment of one front and rear guide rail pair. After adjustment, thread a steel wire through the small holes at the outer ends of the left and right set screws 35 to lock the entire set of left and right set screws 35 in place. A large bending machine's large slide block has four identical front and rear guide rail pairs symmetrically designed.

[0067] Among them, such as Figure 9 , Figure 12 , Figure 13 As shown, the left and right guide rail pairs include L-shaped base plates 40, which are installed at the center of the left and right ends of the slider 10, in four locations: front, back, left, and right. They correspond to the left and right guide rail seats on the left and right columns of the gantry type to form the front and rear guide rail pairs.

[0068] On the side of the L-shaped substrate 40 facing away from the slider 10, there are two mutually perpendicular precision surfaces, a first precision surface and a second precision surface. These surfaces are parallel, perpendicular, and coplanar with the precision reference plane of the slider body with high precision, and are also parallel or perpendicular with the aforementioned front and rear guide rail mounting planes with high precision. Left and right inclined rail components 41 are attached to the first precision surface, and left and right inclined rail seats 42 are attached to the second precision surface. The first precision surface has two sets of screw holes. One set of screw holes is used to install left and right inclined rail component screws 43 for attaching and tightening or loosening the left and right inclined rail components 41, and the other set is used to install left and right inclined rail seat screws 44 for tightening or loosening the left and right inclined rail seats 42 without contact. The second precision surface has a semi-open slot for installing left and right inclined rail tightening screws 45. Left and right copper rail plates 412 are installed on the side of the left and right inclined rail components 41 facing away from the second precision surface.

[0069] like Figure 17 and Figure 18 As shown, the left and right inclined rail components 41 are precision long components with a right-angled trapezoidal cross-section. Their front side, rear side, side vertical surface, and side inclined surface serve as references to each other, and they are designed with precise dimensional and positional accuracy. Along the side vertical surface, the left and right inclined rail components 41 have an array of screw holes for fitting and mounting the left and right copper rail plates 412.

[0070] Along the side vertical surface of the left and right inclined rail members 41, a stepped opening 411 is designed from the front side to the rear side. The stepped opening 411 is used to install the left and right inclined rail member screws 43. The left and right inclined rail member screws 43 pass through the stepped opening 411 and fasten the left and right inclined rail members 41 to the L-shaped base plate 40. Because the stepped opening 411 is a stepped waist-shaped groove, when the left and right inclined rail member screws 43 are loosened, the left and right inclined rail member screws 43 can slide freely along the precision surface as needed.

[0071] Two screw holes are designed at both ends of the inclined surfaces of the left and right inclined rails 41 for installing the left and right inclined rail tensioning screws 45, which pass through the left and right inclined rail seats 42 to tighten or loosen the left and right inclined rail components 41. Note that the axes of these two screw holes are not perpendicular to the inclined surfaces, but are perpendicular to the side vertical surfaces of the left and right inclined rails 17, and are distributed according to a specific correspondence.

[0072] The first precision surface of the L-shaped substrate 40 is the base of the right-angled large surface for mounting the left and right inclined rails 41. The second precision surface is an important reference for determining the reference surface of the left and right inclined rail seats 42. The side of the boss where the second precision surface of the L-shaped substrate 40 is located, which faces away from the slider 10, is the location of the semi-open slot.

[0073] The left and right inclined rail seats 42 are also precision long pieces with a right-angled trapezoidal cross-section. Their front, rear, vertical, and inclined surfaces serve as references to each other, and they are designed with precise dimensional and positional accuracy. From the front (long side) plane to the rear (short side) plane, there are stepped openings 421 and screw holes, spaced apart. The stepped opening 421 is a stepped waist-shaped groove. Front and rear set screws 422, with their ends abutting against the precision surface, are installed in the screw holes. A set of left and right inclined rail seat screws 44 pass through these holes, securing the left and right inclined rail seats 42 to the L-shaped base plate 40. Because of the stepped waist-shaped groove, the left and right inclined rail seats 42 can slide freely as needed when the left and right inclined rail seat screws 44 are loosened. The left and right inclined rail seats 42 have left and right waist-shaped openings that penetrate the vertical and inclined surfaces. Left and right inclined rail tensioning screws 45 are inserted into these openings for connection to the left and right inclined rail components 41.

[0074] When a set of left and right inclined rail seat screws 44 presses the left and right inclined rail seats 42, the pressing action moves the left and right inclined rail components 41 outward along the precision surface of the L-shaped base plate 40, causing them to move outward. Then, a set of front and rear set screws 422 locks the left and right inclined rail seats 42, thus reducing the guide rail gap. Finally, the left and right inclined rail tightening screws 45 are tightened. If it is necessary to increase the guide rail gap, first loosen the left and right inclined rail seat screws 44, then use the front and rear set screws 422 to reverse the movement of the left and right inclined rail seats 42 outward along the precision surface of the L-shaped base plate 40. Then, the left and right inclined rail components 41 are tightened using the left and right inclined rail tightening screws 45, increasing the guide rail gap. After the operation is complete, a steel wire is threaded through the small holes of all the front and rear set screws 422 to lock the entire assembly. A large bending machine's large slider has four identical left and right guide rail pairs symmetrically designed.

[0075] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A heavy-duty hydraulic bending machine slide block moving assembly, characterized in that, include: The flexible connection structure includes a slider shoulder (11), which is fixedly installed on the slider (10). A convex ball seat (12) is movably attached to the slider shoulder (11). A concave ball seat (13) is movably installed on the top of the convex ball seat (12), and the contact surface between the two is a spherical surface. The concave ball seat (13) is connected to the end of the piston (20). The concave ball seat (13) and the slider shoulder (11) are connected by a disc spring assembly. The front and rear guide rail pairs include mounting plates (30) installed on the front and rear sides of the left and right ends of the slider (10). The mounting plates (30) are equipped with front and rear inclined rail seats (31) and front and rear inclined rail components (32). The front and rear inclined rail seats (31) and the front and rear inclined rail components (32) are in contact with each other and the contact surface is an inclined surface. The front and rear inclined rail components (32) are equipped with front and rear copper rail plates (33) on the side facing away from the front and rear inclined rail seats (31). The position of the front and rear inclined rail seats (31) on the mounting plates (30) can be adjusted to change the distance between the front and rear inclined rail components (32) and the mounting plates (30). The left and right guide rail pairs include an L-shaped base plate (40) mounted on the left and right ends of the slider (10). The L-shaped base plate (40) has a precision surface one and a precision surface two perpendicular to each other on the side facing away from the slider (10). The left and right inclined rail components (41) are attached to the precision surface one, and the left and right inclined rail seats (42) are attached to the precision surface two. The precision surface one has two sets of screw holes. One set of screw holes is used to install left and right inclined rail component screws (43) for attaching and tightening or loosening the left and right inclined rail components (41). The other set is used to install left and right inclined rail seat screws (44) for tightening or loosening the left and right inclined rail seats (42) in the air. The precision surface two has a semi-open slot for installing left and right inclined rail tightening screws (45). The left and right inclined rail components (41) have left and right copper rail plates (412) mounted on the side facing away from the precision surface two.

2. The heavy-duty hydraulic bending machine slide block moving assembly according to claim 1, characterized in that, The convex ball seat (12) is provided with a stepped hole, and a double gap sleeve (122) is movably fitted inside the stepped hole. The double gap sleeve (122) has a small end and a large end. The length of the small end of the double gap sleeve (122) is greater than the depth of the small hole of the stepped hole, and the cross-sectional width is less than the cross-sectional width of the small hole of the stepped hole. A convex ball stud (121) is inserted inside the double gap sleeve (122) and screwed into the slider shoulder (11).

3. The heavy-duty hydraulic bending machine slide block moving assembly according to claim 2, characterized in that, The concave ball seat (13) has two circumferentially symmetrical stepped holes with completely equal step surfaces from top to bottom, and the disc spring assembly is installed in the stepped holes.

4. The heavy-duty hydraulic bending machine slide block moving assembly according to claim 3, characterized in that, The disc spring assembly includes a preload pin (131), a sliding pad (132), and a preload disc spring (133). The preload pin (131) passes through the preload disc spring (133) and the sliding pad (132) in sequence and is screwed into the slider shoulder (11). The middle part of the preload pin (131) has a precision outer circle and a clearance fit with the slider shoulder (11). The outer diameter and inner diameter of the sliding pad (132) are respectively left with gaps with the inner diameter of the stepped hole and the outer diameter of the preload pin (131).

5. The heavy-duty hydraulic bending machine slide block moving assembly according to claim 4, characterized in that, The concave ball seat (13) is provided with a pulse oil inlet hole (135), and the concave ball seat (13) is provided with an upper oil hole (134) connected to the pulse oil inlet hole. The convex ball seat (12) is provided with a lower oil hole (123) connected to the upper oil hole (134). The top of the concave ball seat (13) is provided with a groove that matches the boss at the end of the piston (20).

6. A heavy-duty hydraulic bending machine slide block moving assembly according to any one of claims 1 to 5, characterized in that, The front and rear inclined rail seats (31) fix the mounting plate (30) on the slider (10) by the front and rear inclined rail screws (36). The front and rear inclined rail seats (31) are provided with a small platform. The side of the small platform is provided with a waist-shaped groove and screw holes are provided at intervals. The waist-shaped groove is provided with left and right tension screws (34). The screw holes are provided with left and right set screws (35). The left and right set screws (35) and the left and right tension screws (34) are distributed at intervals.

7. The heavy-duty hydraulic bending machine slide block moving assembly according to claim 6, characterized in that, The front and rear inclined rail seats (31) are provided with countersunk holes, which are perpendicular to the mounting plate (30) and are used to install front and rear inclined rail screws (36). The right-angled bottom surface of the front and rear inclined rail seats (31) is attached to the side wall of the mounting plate (30). The inclined surfaces of the front and rear inclined rail seats (31) and the mounting plate (30) are provided with waist-shaped holes with corresponding positions. Front and rear inclined rail tensioning screws (37) are inserted into the waist-shaped holes for connection with the front and rear inclined rail components (32).

8. The heavy-duty hydraulic bending machine slide block moving assembly according to claim 7, characterized in that, The front and rear inclined rails (31), the slider (10) and the mounting plate (30) are provided with precision holes corresponding to their positions. A positioning flat pin (38) is installed in the precision hole. The positioning flat pin (38) is fixed to the slider (10) by a flat pin screw (39). The end of the positioning flat pin (38) away from the slider (10) is provided with a large flat square and the end close to the slider (10) is provided with a small flat square. The front and rear inclined rails (32) are provided with a waist-shaped guide groove (321) that slides with the large flat square. The small flat square is positioned and installed on the slider (10).

9. A heavy-duty hydraulic bending machine slide block moving assembly according to any one of claims 1 to 5, characterized in that, The left and right inclined rails (41) are provided with front and rear stepped openings (411), which are used to install the left and right inclined rail screws (43).

10. The heavy-duty hydraulic bending machine slide block moving assembly according to claim 9, characterized in that, The left and right inclined rail seats (42) are provided with a front-to-back stepped opening (421), a front-to-back screw hole, and a left-to-right waist-shaped opening. The stepped opening (421) is filled with a left and right inclined rail seat screw (44) connected to the L-shaped base plate (40). The screw hole is filled with a front and back set screw (422) whose end abuts against the precision surface. The waist-shaped opening is filled with a left and right inclined rail tensioning screw (45) for connecting to the left and right inclined rail components (41).

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