Bending center die with fixed stress point and shape deviation self-adaptive locking function and die precision adjusting mechanism

Abstract

The utility model discloses a bending center die with a fixed stress point and a shape deviation self-adaptive locking function and a die precision adjusting mechanism. The die comprises a die body, a connecting block and a die clamping assembly. The die body is inserted into the connecting block, and a bearing matching surface and a positioning matching surface are formed; the die clamping assembly comprises a self-adaptive clamping pin, a wedge block and a wedge block pressing component. The self-adaptive clamping pin is embedded in the vertical wall face, facing the clamping groove, of the die body and can rotate freely. The wedge-shaped block is inserted into a clamping groove in the outer side of the mold body, one side of the wedge-shaped block is in contact with the self-adaptive clamping pin, and the other side of the wedge-shaped block and the inner wall surface of the clamping groove form a clamping matching surface; the included angle between the clamping matching surface and the positioning matching surface does not exceed 40 degrees, and self-locking can be achieved; the wedge block pressing part is used for driving the wedge block to be clamped. The clamping device can adapt to machining and manufacturing deviations, the acting point of clamping force is fixed, and the clamping device can adapt to changes of acting force positions and acting force sizes under different working conditions.

Description

Technical Field

[0001] The utility model relates to the field of sheet metal bending, in particular to a bending center mold with a fixed force point and self-adaptive locking for shape deviation. Background Art

[0002] In the sheet metal manufacturing industry, bending is the most technically complex, the most difficult to control quality and the least automated process. In recent years, the sheet metal industry has an increasing demand for automated laser welding. However, the bending accuracy of existing technologies does not meet the standards and cannot meet the needs of automated laser welding in the next process, which seriously restricts the development and progress of the industry.

[0003] Bending center is a new processing equipment developed in the sheet metal industry in recent years. Its processing accuracy and efficiency are significantly improved compared with traditional processing methods. However, there are still technical deficiencies in mold assembly and adjustment. Therefore, only by solving the automatic clamping of the mold can the automatic adjustment and splicing of the mold be realized. It can be said that reliable, efficient and high-precision clamping of the mold is the bottleneck and key technical difficulty that restricts the industry's development towards intelligence.

[0004] The existing mainstream technology of bending center mold clamping mainly includes two methods: profile matching and force clamping. However, these two clamping methods have the following shortcomings during use and need to be improved:

[0005] 1. For the matching of the profile, the requirements for the matching clearance are relatively high. If the matching clearance is small, it is easy to get stuck; if the clearance is large, the accuracy is difficult to guarantee. In addition, after the mold is worn, the clearance will become larger. In addition, the mold shape is mostly special-shaped, difficult to process, poor processability, high cost, and therefore, not suitable for mass production.

[0006] 2. For the force clamping method, due to the limitation of mechanical structure, the horizontal force of the mold is relatively large. When the thin plate is lightly bent, the force clamping problem is not big. When the plate is heavily bent, the mold is usually not tightly pressed, which seriously affects the bending accuracy. Fig.23 In addition, it is difficult to achieve automatic locking and disassembly by force clamping, and it cannot meet the needs of automatic tooling and mold changing.

[0007] 3. For the surface matching and force pressing, the clamping of the mold needs to be locked with the help of external force. For example, when using cylinder clamping, each mold needs to be equipped with a cylinder, the air pipe wiring is difficult, and it is easy to get entangled with other moving mechanisms, causing safety accidents.

[0008] 4. Failure to fine-tune mold accuracy, processing errors, mold wear and other factors will cause errors in mold accuracy and affect bending accuracy.

[0009] The Chinese utility model patent with publication number CN113751592A is named "A multi-sided bending center mold with self-locking and automatic disassembly function", which includes an upper mold body, a self-locking mechanism and a clamping mechanism; the self-locking mechanism includes a fixed bevel block and a locking block with matching bevels, which can achieve self-locking and mold clamping. However, in actual application, it still has the following shortcomings:

[0010] 1. The upper die body is completely clamped by horizontal friction. When impact or vibration occurs during the machining process of the machine tool, the upper die body may not be clamped or may fall off.

[0011] 2. The manufacturing deviation cannot be self-adapted, resulting in uncontrollable clamping force points. However, the upper die of the bending center has both free bending process and flattening process, which requires stable clamping force and clamping force application point.

[0012] 3. There is no way to compensate for the elastic deformation caused by the working load, and the contact state of the contact surface cannot be controlled.

[0013] 4. The load characteristics of the mold are different for different processes, and the mold cannot adapt to different load characteristics.

[0014] 5. During the working process of the mold, due to the load, the mold and each contact surface will produce microscopic elastic deformation, the contact state will change, and the surface contact may be transformed into a line contact or point contact state. Once line contact or point contact occurs, local plastic deformation is inevitable, which will inevitably affect the local friction coefficient, and may cause locking or jamming, resulting in an inability to unlock. Utility Model Content

[0015] The technical problem to be solved by the utility model is to provide a bending center mold with a fixed force point and adaptive locking for shape deviation in view of the deficiencies of the above-mentioned prior art. The bending center mold with a fixed force point and adaptive locking for shape deviation can adapt to the deviation of processing and manufacturing, and the point of application of the clamping force is fixed, which can adapt to changes in the force position and force size under different working conditions.

[0016] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0017] A bending center mold with a fixed force point and self-adaptive locking for shape deviation comprises a mold body, a connecting block and a mold clamping assembly.

[0018] The connecting block has a bearing surface and a clamping groove.

[0019] The end of the mold body has a bearing surface 2 and a positioning protrusion; wherein the bearing surface 1 cooperates with the bearing surface 2 to form a bearing matching surface; the positioning protrusion is inserted into the clamping groove of the connecting block to form a positioning matching surface.

[0020] The mold clamping assembly includes an adaptive clamping pin, a wedge block and a wedge block clamping component.

[0021] The adaptive clamping pin is embedded in the vertical wall surface of the mold body facing the clamping groove and can rotate freely.

[0022] The wedge block is inserted into the clamping groove outside the mold body, one side of the wedge block contacts the adaptive clamping pin, and the other side of the wedge block forms a clamping fitting surface with the inner wall of the clamping groove; the angle between the clamping fitting surface and the positioning fitting surface does not exceed 40°.

[0023] The wedge clamping component is used to drive the clamping of the wedge.

[0024] The included angle α1 between the load-bearing mating surface and the horizontal plane is 120~215°; the included angle α2 between the positioning mating surface and the horizontal plane is 30~120°; and the included angle α3 between the clamping mating surface and the horizontal plane is 60~120°.

[0025] The angles between the load-bearing mating surface, the positioning mating surface and the clamping mating surface and the horizontal plane are set in any of the following five ways:

[0026] Setting method 1: α1=180°, α2=30~120°, α3=60~120°.

[0027] Setting method 2: α1=120~215°, α2=90°, α3=60~120°.

[0028] Setting method three: α1=120~215°, α2=30~120°, α3=90°.

[0029] Setting method 4: α1=180°, α2=90°, α3=90°.

[0030] Setting method five: α1=135°, α2=90°, α3=90°.

[0031] The cross section of the adaptive clamping pin is semicircular, including an arc surface and a plane surface; wherein the arc surface is embedded in the vertical wall surface of the mold body facing the clamping groove and can rotate; the plane surface is in sliding contact with the wedge block; the semicircular portion is a semicircle, a small semicircle or a large semicircle.

[0032] A freely rotatable bearing pin is embedded in the bearing surface 2, and the contact surface between the bearing pin and the bearing surface 1 is a plane.

[0033] The wedge clamping component is a spring, an air cylinder, an oil cylinder or a linear electric push rod.

[0034] A mold limiting structure is also provided at the end of the mold body; the mold limiting structure includes a horizontal limit and / or a vertical limit; the horizontal limit is horizontally arranged outside the second bearing surface and extends into the connecting block; the vertical limit is vertically arranged outside the positioning protrusion and extends into the connecting block.

[0035] The mold clamping assembly also includes a wedge clamping guide mechanism.

[0036] The wedge block pressing guide mechanism comprises a guide block, a guide pin and a vertical guide slot.

[0037] The vertical guide slot is vertically arranged in the positioning protrusion of the mold body.

[0038] The guide block is slidably arranged in the vertical guide slot, and the outer side of the guide block is connected with or integrated with the middle part of the wedge block.

[0039] A guide pin guide groove and a clamping pin guide groove are arranged in the guide block.

[0040] The guide pin is horizontally inserted in the positioning protrusion, passes through the guide pin guide groove, and is matched with the guide pin guide groove.

[0041] The middle part of the adaptive clamping pin is located in the clamping pin guide groove, and both ends of the adaptive clamping pin are provided with clamping pin side stops.

[0042] There are two guide pins which are arranged in parallel; and the guide grooves of the guide pins are arranged obliquely.

[0043] A mold precision adjustment mechanism comprises a mold body, an adjustment support arm, an adjustment screw and an adjustment screw sleeve.

[0044] The adjusting support arm is located inside or outside the mold body, and one end of the adjusting support arm is connected to or integrated with the mold body.

[0045] A. When the adjustment arm is located inside the mold body, the mold body is provided with an adjustment groove for accommodating the adjustment arm, and there is an adjustment gap between the outer periphery of the adjustment arm and each wall surface of the adjustment groove.

[0046] The adjusting screw is set horizontally, the pitch of the adjusting screw is P1, and the adjusting screw is connected to the thread pair at the other end of the adjusting arm.

[0047] The adjusting screw sleeve has internal and external threads, and the thread pitch of the internal threads is P1, and the pitch of the external threads is P2; the internal threads of the adjusting screw sleeve are coaxially sleeved on the outer periphery of the adjusting screw, and the external threads of the adjusting screw sleeve cooperate with the thread pair of the mold body.

[0048] B. When the adjustment arm is located outside the mold body, there is a vertical adjustment gap between the adjustment arm and the mold body.

[0049] The adjusting screw is set horizontally, the pitch of the adjusting screw is P1, and the adjusting screw is connected to the thread pair of the mold body.

[0050] The adjusting screw sleeve has an internal thread and an external thread, and the thread pitch of the internal thread is P1, and the pitch of the external thread is P2; the internal thread of the adjusting screw sleeve is coaxially sleeved on the outer periphery of the adjusting screw, and the external thread of the adjusting screw sleeve cooperates with the thread pair of the adjusting arm;

[0051] By rotating the adjusting screw sleeve, the precision adjustment of the mold body can be achieved; when the adjusting screw sleeve rotates one circle, the mold body will be able to achieve a horizontal adjustment distance Δ, and Δ=P1-P2.

[0052] The utility model has the following beneficial effects:

[0053] 1. The setting of the adaptive clamping pin in the utility model can adapt to the deviation of processing and manufacturing. No matter what kind of deviation it is, since the adaptive clamping pin can roll, it can stably contact and clamp no matter what shape the deviation is.

[0054] 2. The clamping force application point of the utility model is fixed, and can adapt to changes in the force position and force size under different working conditions.

[0055] 3. The utility model has a simple structure, low manufacturing cost, and is easy to automate, and can be mass-produced and commercialized.

[0056] 4. The utility model can optimize and match the angles of the bearing mating surface, the positioning mating surface and the clamping mating surface according to different molds, processing techniques and load properties, so as to automatically find the alignment position of the mold during the mold pressing process.

[0057] 5. The utility model does not require an external input locking power source. When spring compression is adopted, complete power-free clamping can be achieved.

[0058] 6. During the working process of the mold, due to the action of load, the mold and each contact surface will produce microscopic elastic deformation, which will affect the working state of the clamping mechanism. However, the utility model can realize self-adjustment of the clamping state to ensure that the clamping force is controllable. Under the action of bending force, when the connecting block or the mold body is deformed, it will not become loose. Assuming that under the action of force, a gap appears between the adaptive clamping pin and the wedge block, the gap will be forced to be tightened under the action of the mold clamping assembly; this is equivalent to a more stable and controllable clamping force, and there will be no problems of jamming or locking.

[0059] 7. Each mold body of the utility model is clamped by a mold clamping assembly that matches it separately. The clamping force is not affected by external connecting parts, and the connection is more stable and reliable.

[0060] 8. The precision adjustment mechanism of the utility model can fine-tune the manufacturing error and wear of individual mold bodies, avoiding the need to replace or repair the entire set of molds once the precision deviation of individual molds occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 The schematic diagram of the structure of the bending center mold of the utility model with a fixed force point and adaptive locking of shape deviation is shown.

[0062] Figure 2 A schematic diagram showing the angles between the load-bearing mating surface, the positioning mating surface and the clamping mating surface and the horizontal plane in the utility model is shown.

[0063] Figure 3 The schematic diagram of the structure of the bending center mold of the utility model with a bearing pin is shown.

[0064] Figure 4 The schematic diagram of the structure of the mold body with the bearing pin of the utility model is shown.

[0065] Figure 5 Schematic diagrams of four settings of the load-bearing mating surface, the positioning mating surface and the clamping mating surface in the utility model are shown; among them, Figures (a), (b), (c), (d) and (e) correspond to schematic diagrams of settings one, two, three, four and five, respectively.

[0066] Figure 6 The schematic diagram of the structure of the bending center mold with the mold limiting structure of the utility model is shown.

[0067] Figure 7 The schematic diagram of the structure of the bending center mold with a constraint surface of the utility model is shown.

[0068] Figure 8 The schematic diagram of the structure of the bending center mold with a wedge pressing guide mechanism of the utility model is shown.

[0069] Fig. 9 Shows Figure 8 Schematic diagram of the internal partial section.

[0070] Fig.10 Shows Figure 8 Schematic diagram of the structure of the mold body.

[0071] Fig.11 Shows Figure 8 Schematic diagram of the structure of the middle wedge block.

[0072] Fig.12 Shows Figure 8 Schematic diagram of the structure of the adaptive clamping pin.

[0073] Fig.13 A schematic diagram showing the principle of using a wedge to clamp the guide mechanism before guiding.

[0074] Fig.14 The schematic diagram shows the principle of using a wedge block to compress the guide mechanism for guidance.

[0075] Fig.15 A three-dimensional schematic diagram of Example 1 of the mold precision adjustment mechanism in the utility model is shown.

[0076] Fig.16 The schematic diagram shows the structure in which the adjustment arm of the mold precision adjustment mechanism of the utility model is located inside the mold body.

[0077] Fig.17 The schematic diagram shows the structure in which the adjustment arm of the mold precision adjustment mechanism of the utility model is located outside the mold body.

[0078] Fig.18 The schematic diagram of the structure in which the adjustment arm is located outside the mold body and the mold body is slotted in the utility model is shown.

[0079] Fig.19 The precision adjustment deformation cloud diagram after adopting the mold precision adjustment mechanism of the utility model is shown.

[0080] Fig. 20 A three-dimensional schematic diagram is shown when the contact state of the contact surface in the prior art is uncontrollable.

[0081] Fig.21 A three-dimensional self-locking schematic diagram is shown when the bearing mating surface of the bending center mold of the utility model is horizontal.

[0082] Fig. 22 A three-dimensional self-locking schematic diagram is shown when the bearing mating surface of the bending center mold of the utility model is inclined.

[0083] Fig.23 This is a rendering of the effect of a serious error in the bending accuracy of the plate due to the inability of the mold to be pressed tightly in the prior art.

[0084] Among them are:

[0085] 10. Mould body;

[0086] 11. Load-bearing mating surface; 12. Positioning mating surface;

[0087] 13. Bearing surface 2; 131. Bearing pin;

[0088] 14. Positioning protrusion; 141. Adaptive clamping pin groove; 15. Constraint surface;

[0089] 20. Connecting block; 21. Clamping mating surface; 22. Bearing surface 1; 23. Clamping groove;

[0090] 30. Mold clamping assembly; 31. Wedge block; 32. Adaptive clamping pin; 321. Clamping pin side stop; 33. Wedge block clamping component;

[0091] 41. Horizontal limit; 42. Vertical limit;

[0092] 51. Guide block; 511. Guide pin guide groove; 512. Clamping pin guide groove; 513. Side stop sliding surface;

[0093] 52. Guide pin; 53. Vertical guide slot;

[0094] 61. Adjust the gap; 62. Adjust the support arm; 63. Adjust the screw; 64. Adjust the screw sleeve. DETAILED DESCRIPTION

[0095] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0096] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components, and therefore cannot be understood as a limitation on the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention. Example

[0097] like Figure 1 to Figure 2 As shown, a bending center mold with a fixed force point and adaptive locking for shape deviation includes a mold body 10, a connecting block 20 and a mold clamping assembly 30.

[0098] The connection block has Figure 3 The bearing surface 22 and the clamping groove 23 are shown.

[0099] The end of the mold body has Figure 4 The bearing surface 13 and the positioning protrusion 14 are shown. Figure 7 As shown, an additional constraint surface 15 is added between the second bearing surface 13 and the positioning protrusion 14, which can form an over-constraint fit and are considered equivalent.

[0100] The first bearing surface and the second bearing surface cooperate with each other to form a bearing matching surface 11 .

[0101] The positioning protrusion is inserted into the clamping groove of the connecting block to form a positioning matching surface 12 .

[0102] An arc-shaped adaptive clamping pin groove 141 is arranged on the vertical wall surface of the mold body facing the clamping groove.

[0103] The mold clamping assembly includes a wedge block 31 , an adaptive clamping pin 32 and a wedge block pressing component 33 .

[0104] The adaptive clamping pin is embedded in the adaptive clamping pin slot 141 and can rotate freely. The cross section of the adaptive clamping pin is preferably semicircular, including an arc surface and a plane surface; wherein the arc surface is embedded in the vertical wall surface of the mold body facing the clamping slot; and the plane surface is in sliding contact with the wedge block to form a sliding pair.

[0105] The above-mentioned quasi-semicircle can be a standard semicircle, or can be a small semicircle or a large semicircle, etc., which are collectively referred to as quasi-semicircle.

[0106] The adaptive clamping pin can compensate for various positional dimensional deviations, thereby achieving automatic locking.

[0107] The wedge block is inserted into the clamping groove on the outside of the mold body, one side of the wedge block contacts the adaptive clamping pin, and the other side of the wedge block forms a clamping fitting surface 21 with the inner wall of the clamping groove; the angle between the clamping fitting surface and the positioning fitting surface does not exceed 40°, preferably does not exceed 20°, so as to meet the self-locking conditions.

[0108] Due to different materials and different surface friction coefficients, the angle between the clamping mating surface and the positioning mating surface needs to be determined according to different working conditions, such as the height of the mold, the position of the force point, the size of the bending horizontal load, and different processing techniques.

[0109] like Figure 2 As shown, the angle α1 between the load-bearing mating surface and the horizontal plane is preferably 120-215°; the angle α2 between the positioning mating surface and the horizontal plane is preferably 30-120°; and the angle α3 between the clamping mating surface and the horizontal plane is preferably 60-120°.

[0110] In this embodiment, Figure 5 As shown, the angles between the load-bearing mating surface, the positioning mating surface and the clamping mating surface and the horizontal plane are preferably arranged in any one of the following five ways:

[0111] Setting method 1: α1=180°, α2=30~120°, α3=60~120°.

[0112] Setting method 2: α1=120~215°, α2=90°, α3=60~120°.

[0113] Setting method three: α1=120~215°, α2=30~120°, α3=90°.

[0114] Setting method 4: α1=180°, α2=90°, α3=90°.

[0115] Setting method five: α1=135°, α2=90°, α3=90°.

[0116] Due to the manufacturing error and wear of the mold, the existing technology, such as the multilateral bending center mold of CN113751592A, cannot compensate for the elastic deformation caused by the working load during use, and the contact state of the contact surface is uncontrollable. Fig. 20 shown.

[0117] The above α1=180°, that is, when the bearing mating surface is set horizontally, the three-dimensional diagram of the self-locking principle is as follows Fig.21 As shown, at this time, the processing, manufacturing and assembly are simple, and it is preferably suitable for thin plates with light loads.

[0118] The above α1=135°, that is, when the bearing mating surface is inclined, the three-dimensional diagram of the self-locking principle is as follows Fig. 22 As shown, at this time, the contact surface is stable without separation, but the processing and manufacturing is difficult, and it is preferably suitable for high-precision and heavy-load.

[0119] The wedge clamping component is used to drive the clamping of the wedge block, and can realize the clamping and loosening of the mold body. The wedge clamping component is a mature existing technology, such as a spring, a cylinder, an oil cylinder or a linear electric push rod, etc. In this embodiment, a spring or a cylinder is preferred. Under the upward clamping force of the lower surface of the mold body, the bending center mold will automatically find the aligned position.

[0120] During the working process of the mold, due to the action of load, the mold and each contact surface will produce microscopic elastic deformation, which will affect the working state of the clamping mechanism. The utility model can realize self-adjustment of the clamping state, ensuring the controllability of the clamping force. Under the action of the bending force, when the connecting block and the mold body are deformed, they will not loosen. Assuming that under the action of force, a gap appears between the adaptive clamping pin and the wedge block, then under the action of the mold clamping assembly, the gap will be forced to be tightened; this is equivalent to a more stable and controllable clamping force. Specifically, Fig.19 As shown, it is possible to adapt to the deviations in processing and manufacturing. No matter what kind of deviation there is, since the adaptive clamping pin can roll, stable contact and stable clamping can be achieved regardless of the shape deviation. Example

[0121] like Figure 3 and Figure 4 As shown, a freely rotatable bearing pin 131 is embedded in the bearing surface 2, and the contact surface between the bearing pin and the bearing surface 1 is a plane.

[0122] After the bearing pin 131 is embedded, the plane of the bearing pin 131 will be slightly higher than the original bearing surface 2, thereby forming a new bearing surface 2.

[0123] The biggest advantage of the load-bearing pin setting is that when there is a deviation in the processing accuracy of the load-bearing mating surface and the positioning mating surface, the deviation can be adaptively adjusted by rotating the load-bearing pin. Example

[0124] like Figure 6 As shown, a mold limiting structure is also provided at the end of the mold body; the mold limiting structure includes a horizontal limit 41 and / or a vertical limit 42; that is, the mold limiting structure may include only a horizontal limit 41, or only a vertical limit 42, or both a horizontal limit 41 and a vertical limit 42.

[0125] The horizontal limiter is horizontally arranged outside the second bearing surface and extends into the connecting block to assist in the clamping and limiting in the horizontal direction.

[0126] The vertical limiter is vertically arranged outside the positioning protrusion and extends into the connecting block.

[0127] The arrangement of the above-mentioned mold limiting structure can prevent the mold from accidentally falling out of the mold or sliding in a direction perpendicular to the mold cross section due to impact or vibration. Example

[0128] The mold clamping assembly also includes a wedge clamping guide mechanism.

[0129] like Figure 8 and Fig. 9 As shown, the wedge block pressing guide mechanism includes a guide block 51, a guide pin 52 and a vertical guide slot 53.

[0130] like Fig.10 As shown, the vertical guide slot is vertically arranged in the positioning protrusion of the mold body.

[0131] The guide block is slidably arranged in the vertical guide slot, and the outer side of the guide block is connected to the middle part of the wedge block, preferably integrally arranged to form a transverse T-shaped structure.

[0132] The two side walls of the wedge block adjacent to the clamping mating surface are preferably provided with Fig.11 The side stop sliding surface 513 is shown.

[0133] like Fig.11 As shown, a guide pin guide groove 511 and a clamping pin guide groove 512 are arranged in the guide block.

[0134] The guide pin is inserted horizontally in the positioning protrusion and passes through the guide pin guide groove. In this embodiment, there are preferably two guide pins, which are arranged in parallel.

[0135] The middle of the adaptive clamping pin is located in the clamping pin guide groove, such as Fig.12 As shown, both ends of the adaptive clamping pin have clamping pin side blocks 321 that can slide along the side block sliding surface 513.

[0136] The guide pin and guide groove are arranged obliquely, preferably parallel to the sliding surface of the adaptive clamping pin and the wedge block.

[0137] The guiding principle of the wedge block pressing guide mechanism for the wedge block is as follows: Fig.13 and Fig.14 shown. Example

[0138] like Figures 15 to 17 As shown, a mold precision adjustment mechanism includes a mold body, an adjustment arm 62, an adjustment screw 63 and an adjustment screw sleeve 64.

[0139] The mold body is preferably a mold body in a bending center mold.

[0140] The adjusting arm is located inside or outside the mold body, and one end (preferably the top end) of the adjusting arm is connected to or integrated with the mold body.

[0141] A. When the adjustment arm is located inside the mold body, Fig.16 As shown, the mold body is preferably provided with a U-shaped adjustment groove for accommodating the adjustment arm, and an adjustment gap 61 of preferably 1 mm to 5 mm is provided between the outer periphery of the adjustment arm and each wall surface of the adjustment groove.

[0142] The adjusting screw is set horizontally, the pitch of the adjusting screw is P1, and the adjusting screw is connected to the thread pair at the other end of the adjusting arm.

[0143] The adjusting screw sleeve has internal and external threads, and the thread pitch of the internal threads is P1, and the pitch of the external threads is P2; the internal threads of the adjusting screw sleeve are coaxially sleeved on the outer periphery of the adjusting screw, and the external threads of the adjusting screw sleeve cooperate with the thread pair of the mold body.

[0144] B. When the adjustment arm is located outside the mold body, such as Fig.17 and 18 As shown, there is a vertical adjustment gap 61 of preferably 1 mm to 5 mm between the adjustment arm and the mold body. Fig.18 and Fig.17 The difference is that the additional grooves on the mold body can also be regarded as equivalent in this case.

[0145] The adjusting screw is set horizontally, the pitch of the adjusting screw is P1, and the adjusting screw is connected to the thread pair of the mold body.

[0146] The adjusting screw sleeve has an internal thread and an external thread, and the thread pitch of the internal thread is P1, and the pitch of the external thread is P2; the internal thread of the adjusting screw sleeve is coaxially sleeved on the outer periphery of the adjusting screw, and the external thread of the adjusting screw sleeve cooperates with the thread pair of the adjusting arm;

[0147] Whether the adjustment arm is located inside or outside the mold body, the mold body can be adjusted accurately by rotating the adjustment screw sleeve. When the adjustment screw sleeve rotates one circle, the mold body can achieve a horizontal adjustment distance Δ, where Δ=P1-P2. That is, fine adjustment can be achieved by optimizing the matching of P1 and P2. The deformation cloud diagram of accuracy adjustment is shown in the figure below. Fig.19 As shown, the numerical units in the figure are all mm, and the adjustment effect is obvious.

[0148] The mold precision can be fine-tuned to adjust the deviation. This embodiment is easy to adjust and can achieve precision um Fine adjustment of the level. The adjustment mechanism applies an internal force to the mold body, causing it to produce a small elastic deformation, thereby achieving fine adjustment of accuracy.

[0149] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A bending center mold with a fixed force point and adaptive locking for shape deviation, characterized in that: It includes a mold body, a connecting block and a mold clamping assembly; The connecting block has a bearing surface 1 and a clamping groove; The end of the mold body has a bearing surface 2 and a positioning protrusion; wherein the bearing surface 1 cooperates with the bearing surface 2 to form a bearing matching surface; the positioning protrusion is inserted into the clamping groove of the connecting block to form a positioning matching surface; The mold clamping assembly includes an adaptive clamping pin, a wedge block, and a wedge block clamping component; The adaptive clamping pin is embedded in the vertical wall surface of the mold body facing the clamping groove and can rotate freely; The wedge block is inserted into the clamping groove outside the mold body, one side of the wedge block contacts the adaptive clamping pin, and the other side of the wedge block forms a clamping mating surface with the inner wall of the clamping groove; the angle between the clamping mating surface and the positioning mating surface does not exceed 40°; The wedge clamping component is used to drive the clamping of the wedge.

2. The bending center mold with fixed force points and adaptive locking for shape deviation according to claim 1, characterized in that: The included angle α1 between the load-bearing mating surface and the horizontal plane is 120~215°; the included angle α2 between the positioning mating surface and the horizontal plane is 30~120°; and the included angle α3 between the clamping mating surface and the horizontal plane is 60~120°.

3. The bending center mold with fixed force points and adaptive locking for shape deviation according to claim 2, characterized in that: The angles between the load-bearing mating surface, the positioning mating surface and the clamping mating surface and the horizontal plane are set in any of the following five ways: Setting method 1: α1=180°, α2=30~120°, α3=60~120°; Setting method 2: α1=120~215°, α2=90°, α3=60~120°; Setting method three: α1=120~215°, α2=30~120°, α3=90°; Setting method 4: α1=180°, α2=90°, α3=90°; Setting method five: α1=135°, α2=90°, α3=90°.

4. The bending center mold with fixed force points and adaptive locking for shape deviation according to claim 1, characterized in that: The cross section of the adaptive clamping pin is semicircular, including an arc surface and a plane surface; wherein the arc surface is embedded in the vertical wall surface of the mold body facing the clamping groove and can rotate; the plane surface is in sliding contact with the wedge block; the semicircular portion is a semicircle, a small semicircle or a large semicircle.

5. The bending center mold with fixed force points and adaptive locking for shape deviation according to claim 1, characterized in that: A freely rotatable bearing pin is embedded in the bearing surface 2, and the contact surface between the bearing pin and the bearing surface 1 is a plane.

6. The bending center mold with fixed force points and adaptive locking for shape deviation according to claim 1, characterized in that: The wedge clamping component is a spring, an air cylinder, an oil cylinder or a linear electric push rod.

7. The bending center mold with fixed force points and adaptive locking for shape deviation according to claim 1, characterized in that: A mold limiting structure is also provided at the end of the mold body; the mold limiting structure includes a horizontal limit and / or a vertical limit; the horizontal limit is horizontally arranged outside the second bearing surface and extends into the connecting block; the vertical limit is vertically arranged outside the positioning protrusion and extends into the connecting block.

8. The bending center mold with fixed force points and adaptive locking for shape deviation according to claim 1, characterized in that: The mold clamping assembly also includes a wedge clamping guide mechanism; The wedge block pressing guide mechanism comprises a guide block, a guide pin and a vertical guide slide groove; The vertical guide slot is vertically arranged in the positioning protrusion of the mold body; The guide block is slidably arranged in the vertical guide slot, and the outer side of the guide block is connected to or integrated with the middle part of the wedge block; A guide pin guide groove and a clamping pin guide groove are arranged in the guide block; The guide pin is horizontally inserted into the positioning protrusion, passes through the guide pin guide groove, and is matched with the guide pin guide groove; The middle part of the adaptive clamping pin is located in the clamping pin guide groove, and both ends of the adaptive clamping pin are provided with clamping pin side stops.

9. The bending center mold with fixed force points and adaptive locking for shape deviation according to claim 8, characterized in that: There are two guide pins which are arranged in parallel; and the guide grooves of the guide pins are arranged obliquely.

10. A mold precision adjustment mechanism, characterized in that: It includes a mold body, an adjustment arm, an adjustment screw and an adjustment screw sleeve; The adjusting arm is located inside or outside the mold body, and one end of the adjusting arm is connected to or integrated with the mold body; The end of the mold body has a second bearing surface; wherein the second bearing surface cooperates with the first bearing surface of the connecting block to form a bearing matching surface; A. When the adjustment arm is located inside the mold body, the mold body is provided with an adjustment groove for accommodating the adjustment arm, and there is an adjustment gap between the outer periphery of the adjustment arm and each wall surface of the adjustment groove; The adjusting screw is set horizontally, the pitch of the adjusting screw is P1, and the adjusting screw is connected to the thread pair at the other end of the adjusting arm; The adjusting screw sleeve has an internal thread and an external thread, and the thread pitch of the internal thread is P1, and the pitch of the external thread is P2; the internal thread of the adjusting screw sleeve is coaxially sleeved on the outer periphery of the adjusting screw, and the external thread of the adjusting screw sleeve cooperates with the thread pair of the mold body; B. When the adjustment arm is located outside the mold body, there is a vertical adjustment gap between the adjustment arm and the mold body; The adjusting screw is set horizontally, the pitch of the adjusting screw is P1, and the adjusting screw is connected to the thread pair of the mold body; The adjusting screw sleeve has an internal thread and an external thread, and the thread pitch of the internal thread is P1, and the pitch of the external thread is P2; the internal thread of the adjusting screw sleeve is coaxially sleeved on the outer periphery of the adjusting screw, and the external thread of the adjusting screw sleeve cooperates with the thread pair of the adjusting arm; By rotating the adjusting screw sleeve, the precision adjustment of the mold body can be achieved; when the adjusting screw sleeve rotates one circle, the mold body will be able to achieve a horizontal adjustment distance Δ, and Δ=P1-P2.

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