Die locking device and die

Abstract

The invention discloses a mold locking device and a mold, and relates to the technical field of molds, the mold locking device comprises a cylinder body, a locking rod, an end cover and a locking bolt, the cylinder body is provided with an axially through locking hole; the locking rod is installed in the locking hole, the two ends of the locking rod are the locking end and the abutting end respectively, the locking end can extend out of the locking hole, and the abutting end is located in the locking hole; the end cover is connected to the side, close to the abutting end, of the locking hole, and a threaded hole is formed in the end cover; the locking bolt is connected to the threaded hole, the tail end of the locking bolt abuts against the abutting end, and the head end of the locking bolt is provided with a force application structure. The locking rod is jacked or loosened through rotation of the locking bolt, the mold is locked through the locking end of the locking rod, the defects of a traditional wedge key locking mode can be overcome, the mold replacement efficiency and precision are improved, and meanwhile the investment cost and the maintenance cost of an enterprise are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of molds, and in particular to a mold locking device and a mold. Background Art

[0002] In the forging industry, the trimming process plays a vital role, which is directly related to the quality and production efficiency of forging products. With the continuous growth of market demand for diversified forging products, the same press often needs to adapt to the production of forgings of different models and sizes, which requires frequent replacement of the corresponding trimming dies. However, there are many technical difficulties in the disassembly and installation of the current trimming dies, which seriously restricts the production efficiency and economic benefits of enterprises.

[0003] Traditional trimming dies usually use a wedge key locking method to connect the trimming die and the die seat through a specific installation position and locking form. However, this locking method has exposed many defects in practice. First, due to the small operating space, the disassembly and installation tools are difficult to use smoothly, resulting in a time-consuming and labor-intensive mold replacement process, which greatly reduces production efficiency. Secondly, wedge key locking is prone to self-locking, which further prolongs the time required for mold replacement and makes mold replacement inefficient. In addition, when applied to curved forging processing, the traditional wedge key locking method is difficult to cope with the eccentric load generated during the trimming process, which can easily cause mold wear and trimming accuracy problems.

[0004] In addition to the problems of operating space and locking method, mold positioning is also a key link in the mold change process. Accurate mold positioning is the basis for ensuring the quality of trimming, but traditional locking methods often make it difficult to achieve accurate positioning while locking, which increases the time cost of mold change.

[0005] In response to the above problems, current research focuses on two directions: mold standardization and interface optimization, and optimization of mold changing devices and process improvement. However, both methods face many challenges in practical applications. Mold standardization is difficult to implement, and different products have different characteristics, making it difficult to unify the design standards of corresponding mold frames. At the same time, standardization is difficult to meet special production needs, increasing the customization cost of non-standardized molds. New interface technologies are costly and require the modification of molds and equipment, increasing the investment cost of enterprises.

[0006] As for optimizing die changing devices and process improvements, since the trimming process is a process in forging production, most of them appear with non-standard dies and different requirements, it is difficult to invest high costs and dedicated scientific research forces for key research and development. Although the existing hydraulic locking cylinders, electromagnetic joint locking and other methods have improved the efficiency of die changing to a certain extent, they also require professional maintenance and are limited by the workers' operating habits and skill levels. If workers cannot master the new die changing process, it may lead to extended die changing time, even operating errors, and damage to the die or equipment.

[0007] Therefore, in order to ensure the safe, reliable operation and operational convenience during the forging trimming process, it is urgently necessary to develop a new type of rapid die change process and related adapter devices. Summary of the invention

[0008] The purpose of the present invention is to provide a mold locking device and a mold to solve the problems existing in the above-mentioned prior art. The locking rod is tightened or loosened by rotating the locking bolt, and the locking end of the locking rod is used to lock the mold. This can overcome the defects of the traditional wedge key locking method, improve the efficiency and accuracy of mold replacement, and reduce the investment cost and maintenance cost of the enterprise.

[0009] To achieve the above object, the present invention provides the following solutions:

[0010] The present invention provides a mold locking device, comprising a cylinder body, a locking rod, an end cover and a locking bolt, wherein the cylinder body has an axially through locking hole; the locking rod is installed in the locking hole, and the two ends of the locking rod are respectively a locking end and an abutting end, the locking end can extend out of the locking hole, and the abutting end is located in the locking hole; the end cover is connected to a side of the locking hole close to the abutting end, and the end cover is provided with a threaded hole; the locking bolt is connected to the threaded hole, the tail end of the locking bolt abuts against the abutting end, and the head end of the locking bolt has a force-applying structure.

[0011] In one embodiment, the locking end comprises a first wedge surface segment, and in an axial cross section of the locking rod, the first wedge surface segment forms an angle with the axis of the locking rod.

[0012] In one embodiment, the locking end further includes a first planar segment connected to the first wedge surface segment, the first planar segment is located on a side away from the abutting end, and in an axial section of the locking rod, the first planar segment is parallel to the axis of the locking rod.

[0013] In one embodiment, it also includes an elastic component and a clamping cap, the elastic component is sleeved on the rod body of the locking rod, the clamping cap is connected to the abutting end, the locking hole includes a small hole section and a large hole section connected to each other, the small hole section is close to the locking end, the large hole section is close to the abutting end, the connection between the small hole section and the large hole section has a first step, and the elastic component abuts the first step.

[0014] In one embodiment, a pressure cover is also included, wherein the clamping cap is connected to the abutting end through a countersunk screw, the side of the pressure cover close to the abutting end is snapped onto the abutting end and covers the area where the countersunk screw is located, and the other side of the pressure cover away from the abutting end is used to abut the tail end of the locking bolt.

[0015] In one embodiment, the rod body includes a large diameter section and a small diameter section connected to each other, the large diameter section is connected to the locking end, the small diameter section is connected to the abutting end, and a second step is provided at the connection between the large diameter section and the small diameter section, and the elastic component is clamped between the second step and the clamping cap.

[0016] In one embodiment, the elastic component is a disc spring, the first step is used to abut against a portion of the disc spring close to the outer diameter side, and the second step is used to abut against a portion of the disc spring close to the inner diameter side.

[0017] In one embodiment, the radial cross-section of the large diameter segment is a first D-shaped structure, and the radial cross-section of the large hole segment is a second D-shaped structure. The first D-shaped structure matches the second D-shaped structure, and the large hole segment is used to limit the rotation of the large diameter segment.

[0018] The present invention provides a mold, including a die, a die seat and a mold locking device as described above, wherein the die is a first rectangular structure, and the first rectangular structure is provided with a first positioning surface and a second positioning surface on adjacent sides; the die seat is provided with a mounting groove for installing the die, and the mounting groove is a second rectangular structure, and the second rectangular structure is provided with a first reference surface matching the first positioning surface and a second reference surface matching the second positioning surface on adjacent sides; the cylinder body is installed on the die seat, and the side of the die opposite to the first positioning surface is a first locking surface, and the other side of the die opposite to the second positioning surface is a second locking surface, and the first locking surface and the second locking surface are respectively provided with locking interfaces, and the locking end is used to insert the locking interface to lock the die.

[0019] In one embodiment, the locking interface includes a second wedge surface segment and a second plane segment connected to each other, the second plane segment is close to the bottom of the locking interface, in the axial cross-section of the locking interface, the second plane segment is parallel to the axis of the locking interface, and the second wedge surface segment has an angle with the axis of the locking interface.

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

[0021] After the mold locking device is installed on the die seat, the locking bolt can be driven to rotate by rotating the force-applying structure to achieve axial movement of the locking bolt. The abutting end of the locking rod can be tightened or loosened through the axial movement of the locking bolt, and the locking end of the locking rod can be used to lock the trimming die. The operation process is simple and convenient, and the defects of the traditional wedge key locking method can be overcome, the efficiency and accuracy of mold replacement can be improved, and the investment cost and maintenance cost of the enterprise can be reduced.

[0022] Other technical solutions included in the present invention can also achieve the following technical effects:

[0023] 1. The die seats corresponding to the first locking surface and the second locking surface are respectively provided with mold locking devices, which can realize the side locking of the trimming die and increase the operation space.

[0024] 2. The first reference surface and the second reference surface are arranged on the die seat, and the first positioning surface and the second positioning surface are arranged correspondingly on the trimming die. The first positioning surface corresponds to the first reference surface, and the second positioning surface corresponds to the second reference surface. When the trimming die is installed, it will fit with these two positioning reference surfaces successively, and automatically align the positions by relying on the accurate reference provided by the positioning reference surfaces, so that the mold installation operation can quickly complete the positioning steps, thereby improving the overall mold changing efficiency.

[0025] 3. The design of the first wedge surface section of the locking rod and the second wedge surface section of the trimming die utilizes the mechanical properties of the wedge surface during the locking process to achieve a force-enhancing effect and achieve stability and reliability of the position of the trimming die after locking.

[0026] 4. The first locating surface corresponds to the first reference surface, the second locating surface corresponds to the second reference surface, and the first wedge surface segment corresponds to the second wedge surface segment. Therefore, the trimming die, the die locking device, and the die seat are all in surface contact, which can better overcome the eccentric load during the trimming process of the curved forging.

[0027] 5. A first plane section is added to the front end of the first wedge section of the locking rod, so that it does not contact the trimming die when locking. When changing the die or when the locking mechanism fails, the first plane section can bear the weight of the trimming die to prevent it from falling, thereby ensuring the safety of application.

[0028] 6. Through the cooperation of the first D-shaped structure of the locking rod and the second D-shaped structure of the cylinder body, horizontal guidance is added to ensure the accurate cooperation between the locking rod and the trimming die during the locking process, prevent the locking rod from rotating during the locking process of the trimming die, and have the function of preventing the locking rod from rotating, ensuring that the mold locking device can be accurately locked.

[0029] 7. By introducing a disc spring, the locking rod is provided with elastic force in the retracting direction, so that when the mold is disassembled, the locking rod and the trimming die can be actively separated to avoid self-locking of the locking device during the mold change process.

[0030] 8. The elastic force provided by the disc spring during the locking process can overcome the change in the relative position of the locking rod caused by vibration and other reasons, thereby achieving the anti-loosening effect of the locking bolt.

[0031] 9. The present invention realizes the four major functions of the locking rod, namely, anti-locking, anti-rotation, anti-loosening and anti-falling, ensuring the precise positioning of the trimming die and preventing it from falling directly, while being able to realize the functions of rapid positioning and overcoming the side load. Overall, it has the characteristics of simple structure, flexibility and reliability, no high maintenance cost, and simple requirements for operators, solving the problems of limited operating space, easy self-locking and low efficiency of mold replacement in the application of traditional wedge key locking and hydraulic locking methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 This is a schematic diagram of the installation of the mold locking device in an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of a mold locking device in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the arrangement of the mold locking device in an embodiment of the present invention;

[0036] Figure 4 for Figure 1 The enlarged schematic diagram at A in the middle;

[0037] Figure 5 This is a schematic diagram of the locking rod matching in an embodiment of the present invention;

[0038] Among them, 1. die seat; 2. trimming die; 3. locking rod; 4. cylinder body; 5. disc spring; 6. clamping cap; 7. gland; 8. end cover; 9. locking bolt;

[0039] 11. First bolt; 12. Second bolt; 13. Countersunk head screw

[0040] 10. First positioning surface; 20. Second positioning surface; 30. First locking surface; 40. Second locking surface

[0041] 21. Second wedge surface section; 22. Second flat surface section

[0042] 31. First wedge surface section; 32. First flat surface section; 33. Second step

[0043] 41. First step Detailed implementation manners

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] The purpose of the present invention is to provide a mold locking device and a mold to solve the problems existing in the prior art. By rotating the locking bolt to tighten or loosen the locking rod, and using the locking end of the locking rod to lock the mold, the defects of the traditional wedge key locking method can be overcome, the efficiency and accuracy of mold replacement can be improved, and at the same time, the investment cost and maintenance cost of the enterprise can be reduced.

[0046] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0047] As Figure 1 to Figure 5As shown, the present invention provides a mold locking device, including a cylinder body 4, a locking rod 3, an end cover 8 and a locking bolt 9. The cylinder body 4 can be set in a cylindrical shape, and an axially penetrating locking hole is set inside. The cylinder body 4 can be installed on the mold seat. For example, when fixing the mold locking device, the cylinder body 4 can be installed on the die seat 1 through a first bolt 11 (evenly distributed in the circumference, for example, four are set). The locking rod 3 is installed in the locking hole, and the locking rod 3 can move in the locking hole along the axial direction of the locking hole. The two ends of the locking rod 3 are respectively a locking end and an abutting end, wherein the locking end can extend out of the locking hole so as to be inserted into the mold to be locked (mainly the die, such as the trimming die 2), and the abutting end is located in the locking hole. The end cover 8 is connected to one side of the locking hole close to the abutting end, for example, the end cover 8 is fixedly installed with the cylinder body 4 through a second bolt 12 (evenly distributed in the circumference, for example, four are set), and the end cover 8 is provided with a threaded hole. The locking bolt 9 is connected to the threaded hole. When the locking bolt 9 is rotated, the locking bolt 9 can be moved axially along the cylinder body 4 under the action of the threaded hole. The tail end of the locking bolt 9 abuts against the abutting end, so that the locking bolt 9 can push the locking rod 3 to move toward the mold direction when moving axially. The head end of the locking bolt 9 has a force-applying structure, which can be either an inner concave structure or an outer convex structure, such as an inner hexagonal structure or a hexagonal structure.

[0048] After the mold locking device is installed in the die seat 1, the locking bolt 9 can be driven to rotate by rotating the force-applying structure to achieve axial movement of the locking bolt 9. The abutting end of the locking rod 3 can be tightened or loosened through the axial movement of the locking bolt 9, and the locking end of the locking rod 3 can be used to lock the trimming die 2. The operation process is simple and convenient, which can overcome the defects of the traditional wedge key locking method, improve the efficiency and accuracy of mold replacement, and reduce the investment cost and maintenance cost of the enterprise.

[0049] In one embodiment, in combination Figure 4 As shown, the locking end includes a first wedge surface segment 31. In the axial section of the locking rod 3, the first wedge surface segment 31 has an angle with the axis of the locking rod 3. The first wedge surface segment 31 gradually decreases from the side close to the abutting end to the side away from the abutting end. Therefore, through the arrangement of the first wedge surface segment 31, when the locking end moves close to the trimming die 2, it can play a role in advancing and lifting the trimming die 2.

[0050] In one embodiment, in combination Figure 4 As shown, the locking end further includes a first planar section 32 connected to the first wedge surface section 31 . The first planar section 32 is located on a side away from the abutting end. In the axial section of the locking rod 3 , the first planar section 32 is parallel to the axis of the locking rod 3 .

[0051] The first plane section 32 has an important safety function, which can effectively prevent the trimming die 2 from accidentally falling during the mold change process, and plays a vital role in operation safety and production safety. Specifically, when the mold is disassembled, thanks to the design of the first plane section 32 of the locking rod 3, when the locking rod 3 and the trimming die 2 are separated, the trimming die 2 will naturally fall to the first plane section 32 of the locking rod 3. This structure avoids the safety hazard caused by the trimming die 2 falling at will. In addition, even in extreme cases, such as failure of the mold locking device, the first plane section 32 can also play a protective role to ensure that the trimming die 2 will not fall suddenly, thereby ensuring that the production process is safe and orderly.

[0052] In the locked state, only the first wedge surface section 31 of the locking rod 3 and the trimming die 2 is tightly matched, and there is a certain gap between the first plane section 32 of the locking end of the locking rod 3 and the trimming die 2. The first wedge surface section 31 is the main force receiving and force transmission part. Through its special geometric shape, it realizes the conversion from horizontal force to vertical wedge surface pressing force, and achieves the effect of using smaller horizontal force to obtain larger vertical pressing force during the locking process, thereby achieving the force enhancement effect, and better ensuring the stability and reliability of the position of the trimming die 2 and the die seat 1 after locking.

[0053] In one embodiment, if Figure 1 and Figure 2 As shown, it also includes an elastic component and a clamping cap 6. The elastic component is sleeved on the rod body of the locking rod 3. The elastic component can be a spiral spring or a disc spring 5. The clamping cap 6 is connected to the abutting end. The clamping cap 6 can limit the elastic component, and then the elastic component can be pushed and compressed when the clamping cap 6 moves axially. The locking hole includes a small hole section and a large hole section connected to each other. The small hole section is close to the locking end, and the large hole section is close to the abutting end. Therefore, a first step 41 can be formed at the connection between the small hole section and the large hole section. The elastic component abuts the first step 41, so that the first step 41 can support the deformation of the elastic component and provide a reverse support force for the elastic component. The application of the elastic component can provide a thrust for the locking bolt 9 to move away from the trimming die 2. On the one hand, it can prevent the locking rod 3 from self-locking with the trimming die 2, and on the other hand, it can also prevent the locking bolt 9 from self-rotating to ensure stable locking.

[0054] In order to realize the rapid disassembly of the trimming die 2, the die locking device has the function of automatic disengagement. By arranging an elastic component in the die locking device, the locking rod 3 can be retracted as the locking bolt 9 is loosened. Since one end of the elastic component contacts the first step 41 of the cylinder body 4 and the other end contacts the clamping cap 6 on the locking rod 3 during use, the elastic component is always in a compressed state whether in the process of tightening or loosening, that is, there is always a force in the locking rod 3 to disengage from the trimming die 2, that is, the pre-tightening force of the elastic component. In the process of loosening the locking bolt 9, the locking rod 3 will gradually retract under the elastic force of the elastic component, avoiding the occurrence of self-locking.

[0055] In order to ensure the stability of the locking process, the mold locking device has an anti-loosening function. When the locking bolt 9 is fixed, the elastic component will be compressed between the cylinder body 4 and the pressure cover 7. During the operation of the equipment, due to the influence of external factors such as vibration and temperature, there may be a slight gap change or loosening trend at the threaded fit between the locking bolt 9 and the end cover 8. In this process, the compressed elastic component will always give the locking bolt 9 a horizontal rightward elastic force to overcome the influence of vibration and keep the locking bolt 9 and the end cover 8 tightly fitted, thereby resisting the occurrence of loosening. Finally, the accuracy of the locking position of the trimming die 2 during the trimming process is guaranteed.

[0056] In one embodiment, if Figure 1 and Figure 2 As shown, it also includes a gland 7, and the clamping cap 6 is connected to the abutting end of the locking rod 3 through a countersunk screw 13. The side of the gland 7 close to the abutting end is buckled on the abutting end and covers the area where the countersunk screw 13 is located. The other side of the gland 7 away from the abutting end is used to abut the tail end of the locking bolt 9. When the locking bolt 9 moves axially, the tail end of the locking bolt 9 does not directly contact the clamping cap 6 and the countersunk screw 13, but abuts the clamping cap 6 through the gland 7, which can protect the countersunk screw 13 and the clamping cap 6 and avoid damage during the tightening process.

[0057] In one embodiment, if Figure 1 and Figure 2 As shown, the rod body of the locking rod 3 includes a large diameter section and a small diameter section that are connected to each other, the large diameter section is connected to the locking end, and the small diameter section is connected to the abutting end. The connection between the large diameter section and the small diameter section has a second step 33, and the elastic component is clamped between the second step 33 and the clamping cap 6, thereby being able to limit the axial position of the elastic component. It should be noted that during the operation of the mold locking device, the elastic component abuts against the first step 41, not the second step 33. When assembling the mold locking device, after the elastic component is installed on the locking rod 3, the second step 33 can prevent the elastic component from detaching from the locking rod 3.

[0058] In one embodiment, if Figure 1and Figure 2 As shown, the elastic component adopts a disc spring 5, and multiple disc springs 5 ​​are axially stacked. The first step 41 is used to abut the part of the disc spring 5 close to the outer diameter side, and the second step 33 is used to abut the part of the disc spring 5 close to the inner diameter side. It should be noted that the disc spring 5 does not always abut the first step 41 and the second step 33. Generally, during operation, the disc spring 5 abuts the first step 41, and in the installed state, the disc spring 5 may abut the second step 33.

[0059] During operation, tightening the locking bolt 9 controls the locking rod 3 to extend, otherwise the locking rod 3 retracts. The locking rod 3 is matched with the cylinder body 4, and a certain number of disc springs 5 ​​are assembled on the rear end thereof, and the disc springs 5 ​​are pressed in the locking rod 3 by the pressing cap 6 and the countersunk screw 13. In order to realize the control of the locking rod 3 by the locking bolt 9, a pressure cap 7 is provided at the rear end of the locking bolt 9 to push the pressing cap 6 and the locking rod 3 to move horizontally.

[0060] In order to achieve the extension and locking of the locking rod 3 by tightening the locking bolt 9 and to achieve the retraction of the locking rod 3 by loosening it, in this example, one end of the grouped disc spring 5 is abutted against the cylinder body 4, and the other end is abutted against the clamping cap 6, and the extension stroke of the locking rod 3 is 15mm, corresponding to the compression of the disc spring 5 by 75%, providing a certain spring force. When the locking rod 3 is fully retracted, the disc spring 5 is guaranteed to be compressed by 25%, with a certain pre-tightening force, which is used to promote the separation of the locking rod 3 and the trimming die 2.

[0061] In one embodiment, if Figure 5 As shown, the radial cross-section of the large diameter section presents a first D-type structure, and the radial cross-section of the large hole section presents a second D-type structure. The first D-type structure matches the second D-type structure, and the large hole section is used to limit the rotation of the large diameter section to avoid the locking rod 3 being driven to rotate during the process of tightening or loosening the locking rod 3 by the locking bolt 9.

[0062] In order to achieve rapid locking and accurate matching of the trimming die 2, the mold locking device has the function of preventing the locking rod 3 from rotating. Since the locking rod 3 and the trimming die 2 are wedge-faced, it is necessary to ensure that the wedge surfaces of the two are always in a parallel state to avoid the situation where the two cannot fit tightly when the locking rod 3 is fully extended, resulting in an unlocked state, which causes certain safety hazards. Through the cooperation of the first D-type structure and the second D-type structure, a horizontal guide surface can be added to the lower surface where the locking rod 3 and the cylinder body 4 contact. Through the horizontal guide surface, the rotation of the locking rod 3 in the cylinder body 4 can be limited, so that the locking rod 3 can only move horizontally when the locking bolt 9 rotates to provide torque, thereby ensuring that the two inclined wedge surfaces always remain parallel, improving the accuracy of the locking process.

[0063] Reference again Figure 1 to Figure 5As shown, the present invention provides a mold, which can be a stamping mold, an extrusion mold, a molding mold or a trimming mold, etc. When it is a trimming mold, the trimming mold includes a trimming die 2, a die seat 1 and a mold locking device as described above. Of course, in order to achieve the trimming function, a trimming punch matching the trimming die 2 can also be provided. The trimming mold in the present invention is mainly used to solve the problem of locking and fixing the trimming die 2. The trimming die 2 is a first rectangular structure, and the first rectangular structure has two adjacent sets of parallel opposite sides, and the intersection of the two adjacent sides may not necessarily be a right angle. The first rectangular structure is provided with a first positioning surface 10 and a second positioning surface 20 on the adjacent sides. The first positioning surface 10 and the second positioning surface 20 are precisely processed and can be used as a positioning reference. The die seat 1 is provided with an installation groove for installing the trimming die 2, and the installation groove is a second rectangular structure, and the second rectangular structure has two adjacent sets of parallel opposite sides, and the intersection of the two adjacent sides may not necessarily be a right angle. The second rectangular structure is provided with a first reference surface matched with the first positioning surface 10 and a second reference surface matched with the second positioning surface 20 on adjacent sides, and the first reference surface and the second reference surface are also precisely processed to meet the positioning requirements. The cylinder body 4 is mounted on the die seat 1 by means of the first bolt 11 or welding, the side of the trimming die 2 opposite to the first positioning surface 10 is the first locking surface 30, and the other side of the trimming die 2 opposite to the second positioning surface 20 is the second locking surface 40, the first locking surface 30 and the second locking surface 40 do not need to be precisely processed, and locking interfaces are respectively provided on the first locking surface 30 and the second locking surface 40, and the locking end of the locking rod 3 is used to insert the locking interface to lock the trimming die 2.

[0064] Combination Figure 3As shown, the mold locking devices are installed on the die base 1 at positions corresponding to the first locking surface 30 and the second locking surface 40. Different numbers of mold locking devices are set according to the length of the first locking surface 30 or the second locking surface 40. For example, when the length is short, one group of mold locking devices can be set accordingly, and when the length is long, two or more groups of mold locking devices can be set. When installing the trimming die 2, the upper plane of the trimming die 2 and the die base 1 fit tightly. In order to ensure that the position of the trimming die 2 is relatively stable and the structure is reliable during operation, three mold locking devices are used in the locking process in this example. The trimming die 2, the mold locking device, and the die base 1 are all in surface contact, which can better overcome the eccentric load during the trimming process of the curved forging. At the same time, in order to improve the die changing speed, two positioning base surfaces are designed on the die base 1 and the trimming die 2 (the first positioning surface 10 corresponds to the first reference surface, and the second positioning surface 20 corresponds to the second reference surface). The trimming die 2 is pressed against the first reference surface of the die base 1 by two sets of die locking devices, and then the trimming die 2 is pressed against the second reference surface of the die base 1 by the third set of die locking devices. The first reference surface and the second reference surface play a key role. They are precision-machined reference planes located on the opposite sides of the mold locking device. When the trimming die 2 is installed, it will fit with the two positioning reference surfaces in turn, and automatically align the position by relying on the accurate reference provided by the positioning reference surfaces, so that the mold installation operation can quickly complete the positioning steps, thereby improving the overall die changing efficiency.

[0065] In one embodiment, the locking interface provided on the trimming die 2 includes a second wedge surface segment 21 and a second plane segment 22 connected to each other, the second plane segment 22 is close to the bottom of the locking interface, in the axial section of the locking interface, the second plane segment 22 is parallel to the axis of the locking interface, and the second wedge surface segment 21 has an angle with the axis of the locking interface. During the locking process, the first wedge surface segment 31 fits with the second wedge surface segment 21 to support the locking, the first plane segment 32 is in a non-contact state with the second plane segment 22, and the second plane segment 22 leaves space for the first plane segment 32 to move. Through such a structural design, the wedge surface becomes the main force-bearing and force-transmitting part, and at the same time, the first plane segment 32 can play a role under certain circumstances (see the previous description of the function and role of the first plane segment 32).

[0066] In order to fix the position of the trimming die 2 by the mold locking device, a wedge locking method is adopted. The first locking surface 30 and the second locking surface 40 of the trimming die 2 are respectively designed with matching locking interfaces, and the first wedge surface section 31 of the extended locking rod 3 fits with the second wedge surface section 21 of the trimming die 2. The locking bolt 9 provides the locking force of the locking rod 3 to the left horizontally, and through the action and transmission of force, provides the locking force of the vertical wedge surface of the trimming die 2 upward, which is used to overcome the trimming force and its own gravity during the trimming process.

[0067] The present invention aims at the common mold locking and fast mold changing problems in the operation of the trimming press, and proposes a mold locking device that is easy to disassemble quickly and has a reliable structure. Through the design of the first reference surface and the second reference surface of the die seat 1 and the design of the locking interface of the trimming die 2, fast positioning and locking during the mold change process are achieved. At the same time, the mold locking device uses the wedge surface to increase the force to ensure stable locking, and has the functions of anti-rotation, automatic disengagement, anti-self-locking and anti-loosening, which effectively improves the efficiency of mold change and effectively ensures the safe and reliable implementation of the trimming process.

[0068] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A mold locking device, characterized in that: include: A cylinder body, wherein the cylinder body has an axially penetrating locking hole; A locking rod, the locking rod is installed in the locking hole, the two ends of the locking rod are respectively a locking end and an abutting end, the locking end can extend out of the locking hole, and the abutting end is located in the locking hole; An end cover, the end cover is connected to a side of the locking hole close to the abutting end, and the end cover is provided with a threaded hole; And a locking bolt, wherein the locking bolt is connected to the threaded hole, the tail end of the locking bolt abuts against the abutting end, and the head end of the locking bolt has a force-applying structure.

2. The mold locking device according to claim 1, characterized in that: The locking end comprises a first wedge surface segment, and in an axial cross section of the locking rod, the first wedge surface segment forms an angle with the axis of the locking rod.

3. The mold locking device according to claim 2, characterized in that: The locking end further comprises a first planar section connected to the first wedge surface section, the first planar section is located at a side away from the abutting end, and in an axial section of the locking rod, the first planar section is parallel to the axis of the locking rod.

4. The mold locking device according to claim 1, characterized in that: It also includes an elastic component and a clamping cap, wherein the elastic component is sleeved on the rod body of the locking rod, the clamping cap is connected to the abutting end, the locking hole includes a small hole section and a large hole section connected to each other, the small hole section is close to the locking end, the large hole section is close to the abutting end, a first step is provided at the connection between the small hole section and the large hole section, and the elastic component abuts the first step.

5. The mold locking device according to claim 4, characterized in that: It also includes a pressure cover, the clamping cap is connected to the abutting end through a countersunk screw, the side of the pressure cover close to the abutting end is snapped on the abutting end and covers the area where the countersunk screw is located, and the other side of the pressure cover away from the abutting end is used to abut the tail end of the locking bolt.

6. The mold locking device according to claim 4, characterized in that: The rod body includes a large diameter section and a small diameter section connected to each other, the large diameter section is connected to the locking end, the small diameter section is connected to the abutting end, and a second step is provided at the connection between the large diameter section and the small diameter section, and the elastic component is clamped between the second step and the clamping cap.

7. The mold locking device according to claim 6, characterized in that: The elastic component adopts a disc spring, the first step is used to abut the portion of the disc spring close to the outer diameter side, and the second step is used to abut the portion of the disc spring close to the inner diameter side.

8. The mold locking device according to claim 6, characterized in that: The radial cross section of the large diameter section presents a first D-shaped structure, and the radial cross section of the large hole section presents a second D-shaped structure. The first D-shaped structure matches the second D-shaped structure, and the large hole section is used to limit the rotation of the large diameter section.

9. A mold, characterized in that: include: A concave mold, wherein the concave mold is a first rectangular structure, and the first rectangular structure is provided with a first positioning surface and a second positioning surface on adjacent sides; A die seat, wherein the die seat is provided with a mounting groove for mounting the die, the mounting groove is a second rectangular structure, and the second rectangular structure is provided with a first reference surface matched with the first positioning surface and a second reference surface matched with the second positioning surface on adjacent sides thereof; And the mold locking device as described in any one of claims 1 to 8, the cylinder body is installed on the die seat, the side of the die opposite to the first positioning surface is the first locking surface, the other side of the die opposite to the second positioning surface is the second locking surface, the first locking surface and the second locking surface are respectively provided with locking interfaces, and the locking end is used to insert the locking interface to lock the die.

10. The mold according to claim 9, characterized in that: The mold is a trimming mold, the die is a trimming die, the locking interface includes a second wedge surface segment and a second plane segment connected to each other, the second plane segment is close to the bottom of the locking interface, in the axial section of the locking interface, the second plane segment is parallel to the axis of the locking interface, and the second wedge surface segment has an angle with the axis of the locking interface.

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