A cyclic loading die device for removing residual internal stress of cemented carbide blank and a method of use

Abstract

The application provides a cyclic loading die device for removing residual internal stress of a cemented carbide blank and a use method thereof. The device comprises a first module, the first module comprises a middle die frame, a plurality of first guide holes are arranged on the middle die frame, a dynamic slide rod is arranged in each first guide hole, a clamping block is connected to the dynamic slide rod, and the clamping block is pushed on the side end surface of the cemented carbide blank. A dynamic pressure head is installed in the middle die frame, one side end surface of the dynamic pressure head is attached to the end surface of the cemented carbide blank and located between the clamping blocks, a fixed pressure head is connected to the dynamic pressure head, a fixing assembly is arranged on the middle die frame and corresponds to the position of the first guide hole, and the dynamic slide rod is fixed through the fixing assembly. A guide sleeve is sleeved on the dynamic pressure head in the middle die frame, and one end of the guide sleeve close to the cemented carbide blank is installed between the clamping blocks. The device can realize effective removal of the residual internal stress of the cemented carbide blank by closely attaching the dynamic pressure head to the pressure surface of the cemented carbide blank, and the efficiency and quality of stress relief are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cemented carbide preparation, and particularly relates to a cyclic loading mold device for removing residual internal stress of a cemented carbide blank and a use method. BACKGROUND

[0002] As an indispensable tool material in the field of machining, cemented carbide plays a crucial role in improving machining precision and efficiency due to its excellent hardness and toughness. This alloy usually selects tungsten carbide (WC) and cobalt (Co) powder as the main raw material and is manufactured through a series of complex powder metallurgy process steps, including fine powder processing to ensure uniform particle distribution, shaping to give the material the required shape, and a high-temperature sintering process to enhance the bonding force between particles, and finally post-processing to optimize its physical and mechanical properties.

[0003] During the sintering and cooling stage of cemented carbide, due to the significant difference in thermal expansion coefficient between the WC hard phase and the Co binder phase, and the uneven temperature distribution between the inner and outer layers of the sintered blank, a temperature gradient is formed. These factors together cause residual internal stress in the alloy, which is the root cause of cracks or edge collapse in the subsequent machining process of the tool, seriously affecting the service life and machining quality of the tool.

[0004] In order to effectively remove these residual internal stresses, a micro-plastic deformation technology based on cyclic loading is proposed. This technology applies periodic loads to the cemented carbide blank to cause small plastic deformation, thereby releasing and redistributing internal stress, achieving the purpose of reducing or eliminating residual stress. This method not only improves the mechanical properties of the tool, but also enhances its stability and durability during use.

[0005] However, the traditional integral rigid mold, when implementing this technology, fixes the blank in the mold cavity formed by the upper and lower molds through a clamping structure. During clamping, the blank is positioned and leveled by manual adjustment with measuring tools, then the mold pressure head is installed on the blank, the mold pressure head is supported by auxiliary tools, and the mold pressure head is pressed by a pressing device to remove the residual internal stress in the blank. Although this method can remove the residual internal stress in the blank, during the installation and pressing process, due to manual installation errors, the contact between the mold pressure head and the pressed surface of the cemented carbide blank is not complete, especially in the corner area of the blank, leading to uneven stress distribution, and the residual stress in the corner area is difficult to effectively release, resulting in poor removal effect of the residual internal stress in the corner of the blank. SUMMARY

[0006] In order to solve the problem that the contact between the mold pressure head and the pressed surface of the hard alloy blank is not complete when the traditional rigid mold removes the residual stress in the blank, which leads to poor removal effect of residual stress in the corner of the blank, the application provides a cyclic loading mold device for removing residual stress in hard alloy blank and a use method.

[0007] In order to achieve the above-mentioned purpose, the application provides the following technical scheme:

[0008] The application provides a cyclic loading mold device for removing residual stress in hard alloy blank, which comprises a first module, the hard alloy blank is clamped in the first module, and a dynamic pressure head is installed at the top and bottom of the hard alloy blank in the first module.

[0009] The first module comprises a middle mold frame, a plurality of first guide holes are arranged on the middle mold frame, a dynamic sliding rod is arranged in each first guide hole, one end of the dynamic sliding rod extends into the middle mold frame, the other end of the dynamic sliding rod extends outside the middle mold frame, a clamping block is connected to the inner end of the dynamic sliding rod through a first ball groove assembly, and the clamping block is pushed on the side end surface of the hard alloy blank.

[0010] A dynamic pressure head is installed at the top and bottom of the hard alloy blank in the middle mold frame, the side end surface of the dynamic pressure head is attached to the end surface of the hard alloy blank and located between the clamping blocks, a fixed pressure head is connected to the side of the dynamic pressure head away from the hard alloy blank through a second ball groove assembly, and the fixed pressure head is used for connecting a pressurizing device.

[0011] A fixing assembly is arranged on the middle mold frame corresponding to the position of the first guide hole, and the dynamic sliding rod is fixed through the fixing assembly.

[0012] A guide sleeve is sleeved on the dynamic pressure head in the middle mold frame, and one end of the guide sleeve close to the hard alloy blank is installed between the clamping blocks.

[0013] Preferably, a sliding layer is arranged between the guide sleeve and the dynamic pressure head.

[0014] Preferably, the size of the end surface of the dynamic pressure head attached to the hard alloy blank is the same as the size of the end surface of the hard alloy blank.

[0015] Preferably, the first ball groove assembly comprises a first ball head and a first recess, the first recess is engaged with the first ball head, the first ball head is fixed on the inner end of the dynamic sliding rod, and the first recess is arranged on the outer end surface of the clamping block.

[0016] Preferably, the second ball groove assembly comprises a second ball head and a second groove, the second ball head is engaged with the second groove, the second ball head is fixed on the inner side end of the constant pressure head, and the second groove is arranged on the outer side end of the dynamic pressure head.

[0017] Preferably, a second module is arranged on the middle die frame at the position of the constant pressure head, the second module comprises an end die frame, the end die frame is connected with the middle die frame, the constant pressure head penetrates through the end die frame, a righting assembly is arranged on the inner side of the end die frame at the side of the constant pressure head, and the righting assembly is used for righting the constant pressure head.

[0018] Preferably, the righting assembly comprises a fixed baffle, one side end surface of the fixed baffle is attached to the side end surface of the constant pressure head, a connecting table is arranged at the center position of the other side end surface of the fixed baffle, a threaded hole is arranged on the connecting table, one end of a fixed slide rod is connected in the threaded hole, a second guide hole is arranged on the end die frame, the other end of the fixed slide rod extends to the outside of the end die frame through the second guide hole, and the end die frame is also provided with the fixing assembly at the position corresponding to the second guide hole, and the fixing assembly fixes the fixed slide rod.

[0019] Preferably, the fixing assembly comprises a fixing sleeve arranged on the outer wall of the end die frame at the position corresponding to the second guide hole and on the middle die frame at the position corresponding to the first guide hole, a fastening bolt is arranged on the fixing sleeve, and the fastening bolt is used for fixing the fixed slide rod and the dynamic slide rod on the fixing sleeve.

[0020] Preferably, a threaded connection hole is arranged on the end surface of the middle die frame, a through hole is arranged on the end surface of the end die frame, a pin bolt is arranged in the through hole, and the inner side end of the pin bolt is mounted in the threaded connection hole.

[0021] The application provides a use method of a cyclic loading die device for removing residual internal stress of a cemented carbide blank, which is used for the device and comprises the following steps:

[0022] According to the shape and size of the pressure surface of the cemented carbide blank, a dynamic pressure head and a constant pressure head are matched, the dynamic pressure head and the constant pressure head are connected through a second ball groove assembly;

[0023] The cemented carbide blank is moved into the middle die frame of the first module, clamped through a clamping block, and the clamping block and the dynamic slide rod are connected through a first ball groove assembly, one end of the slide rod penetrates through a first guide groove,

[0024] The end of the dynamic pressure head connected by the second ball groove assembly is tightly attached to the end face of the hard alloy blank, a guide sleeve is arranged outside the dynamic pressure head, and the included angle between the center lines of the fixed pressure head and the dynamic pressure head is adjusted to 180°; the fixed assembly is adjusted to fix the dynamic sliding rod;

[0025] The residual internal stress of the hard alloy blank is removed by using a hydraulic device to cyclically load the fixed pressure head and cyclically load the hard alloy blank.

[0026] Compared with the prior art, the present application has the following beneficial technical effects:

[0027] The present application provides a cyclic loading mold device for removing residual internal stress of a hard alloy blank. The device fixes and positions the hard alloy blank through the first module, i.e. the dynamic sliding rod and the clamping block in the first module accurately push the side of the hard alloy blank, ensuring the stability of the blank during the stress process. The flexible connection of the first ball groove assembly allows the clamping block to be adjusted according to the actual shape of the blank, thereby improving the uniformity and accuracy of stress relief. The cooperation of the dynamic pressure head and the fixed pressure head provides stable pressure in the upward and downward directions for the hard alloy blank, effectively simulates the stress state in actual work, and helps to more comprehensively release the residual stress inside the blank. The second ball groove assembly makes the connection between the dynamic pressure head and the fixed pressure head more stable and has a certain buffering effect, avoiding damage to the blank caused by excessive pressure. The fixed assembly ensures the stability of the dynamic sliding rod during the loading process, preventing the stress relief effect from being reduced due to the shaking of the dynamic sliding rod. The guide sleeve provides accurate guidance for the dynamic pressure head, further enhancing the stability and durability of the entire mold device. Therefore, the device can effectively remove the residual internal stress of the hard alloy blank by tightly attaching the dynamic pressure head to the pressure surface of the hard alloy blank, improving the efficiency and quality of stress relief.

[0028] Further, the device is provided with a sliding layer between the guide sleeve and the dynamic pressure head, which can significantly reduce the frictional resistance between the two, making the movement of the dynamic pressure head during loading more smooth, reducing energy consumption and prolonging the service life of the mold, while ensuring the accuracy and uniformity of stress relief, further improving the overall processing efficiency and effect.

[0029] Further, the clamping block and the movable slide rod are connected through the first ball head and the first groove in the device, and the fixed pressure head and the movable pressure head are connected through the second ball head and the second groove, so that the connection stability and flexibility between the movable slide rod and the clamping block and between the fixed pressure head and the movable pressure head are enhanced, the components can be closely matched and work cooperatively during the loading process, and the good buffering and self-adaptive adjustment functions are realized through the clamping mode of the ball head and the groove, so that the damage of the blank caused by stress concentration or uneven loading is effectively avoided.

[0030] Further, the second module is additionally arranged on the middle mold frame at the position of the fixed pressure head in the device, the fixed pressure head is fixed by the fixed baffle and the fixed slide rod, the stability during the loading process of the fixed pressure head is ensured, the overall stability and durability of the mold device are improved, and the efficiency and effect of removing the residual internal stress of the hard alloy blank are also significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A schematic view of a cyclic loading mold device for removing residual internal stress of a hard alloy blank is provided in the present application;

[0032] Figure 2 A sectional view of a cyclic loading mold device for removing residual internal stress of a hard alloy blank is provided in the present application;

[0033] Figure 3 A connection diagram of the fixed slide rod and the fixed baffle in a cyclic loading mold device for removing residual internal stress of a hard alloy blank is provided in the present application;

[0034] Figure 4 A connection diagram of the fixed pressure head and the movable pressure head in a cyclic loading mold device for removing residual internal stress of a hard alloy blank is provided in the present application;

[0035] In the drawings: 1, fixed pressure head; 2, end mold frame; 3, fixed slide rod; 4, middle mold frame; 5, movable slide rod; 6, movable pressure head; 7, pin bolt; 8, fixed baffle; 9, fastening bolt; 10, guide sleeve; 11, clamping block; 12, fixed sleeve; 13, first ball head; 14, first groove; 15, second ball head; 16, second groove. DETAILED DESCRIPTION

[0036] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0037] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0038] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0041] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0042] Reference Figures 1-4The application provides a cyclic loading mold device for removing residual internal stress of a cemented carbide blank, which comprises a first module and a second module, and the upper and lower ends of the first module are respectively connected with the second module, the first module is used for fixing and positioning the cemented carbide blank, so that the cemented carbide blank is in full contact with the first module, and then the pressure surface of the cemented carbide blank can be uniformly pressed, the residual internal stress in the cemented carbide blank is effectively and quickly removed, and the second module is used for auxiliary fixing and positioning, and the uniformity of the stress on the pressure surface of the cemented carbide blank is further improved.

[0043] Referring to Figures 1-4 The first module comprises a middle mold frame 4, the middle mold frame 4 is a square frame, a plurality of first guide holes are arranged on the outer wall of the middle mold frame 4, that is, one second guide hole is arranged on each side of the square frame, and the axes of the first guide holes arranged on the opposite two side end faces of the square frame are collinear, one movable slide rod 5 is arranged in each first guide hole, one end of the movable slide rod 5 extends into the middle mold frame 4, the other end of the movable slide rod 5 extends out of the middle mold frame 4, a clamping block 11 is connected to the inner side end of the movable slide rod 5 through a first ball groove assembly, the clamping block 11 is pushed against the side end face of the cemented carbide blank, the first ball groove assembly comprises a first ball head 13 and a first groove 14, the first groove 14 is clamped with the first ball head 13, the first ball head 13 is fixed to the inner side end of the movable slide rod 5, and the first groove 14 is arranged on the outer side end face of the clamping block 11, which is helpful for better adapting to the slight unevenness or deformation of the surface of the cemented carbide blank, ensures that the clamping force can be uniformly distributed, avoids damage caused by excessive local pressure, meanwhile, through the close cooperation of the first ball head 13 and the first groove 14, the overall stability of the clamping of the cemented carbide blank is enhanced, which is helpful for maintaining the stable contact between the clamping block 11 and the cemented carbide blank during the cyclic loading process, ensures the accurate transmission of the loading force, and the first ball head 13 and the first groove 14 make the installation and dismounting of the clamping block 11 more convenient, without the need for complex fasteners or adjustment process. This not only improves the work efficiency, but also facilitates the subsequent maintenance and replacement work.

[0044] Referring to Figure 1 , Figure 2 and Figure 4, the dynamic pressure head 6 is installed at the top and bottom of the cemented carbide blank in the middle mold frame 4, one side end surface of the dynamic pressure head 6 is attached to the end surface of the cemented carbide blank and located between the clamping blocks 11, the end surface size of the dynamic pressure head 6 attached to the cemented carbide blank is the same as the end surface size of the cemented carbide blank, the side of the dynamic pressure head 6 away from the cemented carbide blank is connected with the constant pressure head 1 through the second ball groove assembly, the constant pressure head 1 is used to connect the pressure equipment, the constant pressure head 1 limits the lateral deviation or movement of the dynamic pressure head 6, the end surface area of the constant pressure head 1 is the same as the end surface area of the dynamic pressure head 6, the second ball groove assembly includes a second ball head 15 and a second groove 16, the second ball head 15 is engaged with the second groove 16, the second ball head 15 is fixed on the inner side end head of the constant pressure head 1, the second groove 16 is arranged on the outer side end head of the dynamic pressure head 6, the dynamic pressure head 6 and the constant pressure head 1 are connected through the second ball groove assembly, on the premise of not affecting pressure transmission, the flexibility and coordination of the dynamic pressure head 6 and the constant pressure head 1 are improved, the dynamic pressure head 6 and the pressure receiving surface of the cemented carbide blank are closely attached, the stress is uniform, on the other hand, the dynamic pressure head 6 and the constant pressure head 1 can be independently controlled, the end surface shape and size of the dynamic pressure head 6 can be selected according to the shape and size of the pressure receiving surface of the cemented carbide blank, and the shape selection of the constant pressure head 1 is not affected;

[0045] Referring to Figure 2 , a guide sleeve 10 is sleeved on the dynamic pressure head 6 in the middle mold frame 4, one end of the guide sleeve 10 close to the cemented carbide blank is installed between the clamping blocks 11, the setting of the guide sleeve 10 ensures the stability and accuracy of the dynamic pressure head 6 when the pressure is applied, provides a fixed path for the movement of the dynamic pressure head 6, so that the dynamic pressure head 6 can move smoothly and accurately, avoids uneven loading or errors caused by deviation or shaking, the guide sleeve 10 is also used to fix and support the dynamic pressure head 6, and adjust and limit the rotation of the dynamic pressure head 6, a sliding layer is arranged between the guide sleeve 10 and the dynamic pressure head 6, which can effectively reduce the resistance of the dynamic pressure head 6 during movement, so that the loading process is more smooth and efficient, the close cooperation between the guide sleeve 10 and the dynamic pressure head 6 ensures the uniform distribution of the loading force, which helps to maintain the stability and consistency of the loading force in the cyclic loading process, so as to more effectively remove the residual internal stress in the cemented carbide blank.

[0046] Referring to Figures 1-4The upper end port and the lower end port of the middle mold frame 4 are respectively provided with a second module, the second module comprises an end mold frame 2, a threaded connection hole is arranged on the end face of the middle mold frame 4, a through hole is arranged on the end face of the end mold frame 2, a column pin bolt 7 is arranged in the through hole, the inner end head of the column pin bolt 7 is arranged in the threaded connection hole, the end mold frame 2 is connected with the middle mold frame 4, the end mold frame 2 and the middle mold frame 4 are connected through the column pin bolt 7, on the one hand, the end mold frame 2 and the middle mold frame 4 are convenient to assemble and disassemble, and it is easy to replace accessories and maintain, on the other hand, the end mold frame 2 and the middle mold frame 4 form a rigid whole after combination, and the coordinated application between multiple structures is beneficial, the fixed pressure head 1 passes through the end mold frame 2, a righting assembly is arranged on the side of the end mold frame 2 and located at the fixed pressure head 1, the righting assembly is used for righting the fixed pressure head 1, the flexibility of rotation of the movable pressure head 6 and the hard alloy blank around the center axis of the device is ensured through cooperation of the movable slide rod 5, and lateral movement is prevented.

[0047] Referring to Figures 1-4 The righting assembly comprises a fixed baffle plate 8, one side end face of the fixed baffle plate 8 is attached to the side end face of the fixed pressure head 1, a connecting table is arranged at the center position of the other side end face of the fixed baffle plate 8, a threaded hole is arranged on the connecting table, one end of the fixed slide rod 3 is connected in the threaded hole, a second guide hole is arranged on the end mold frame 2, the other end of the fixed slide rod 3 extends to the outside of the end mold frame 2 through the second guide hole, and the fixed pressure head 1 is ensured to move up and down and is prevented from moving laterally or rotating through the fixed baffle plate 8, the fixed slide rod 3 and the end mold frame 2.

[0048] Referring to Figure 1 and Figure 2 The position corresponding to the second guide hole of the end mold frame 2 is also provided with a fixing assembly, the fixing assembly fixes the fixed slide rod 3, the position corresponding to the first guide hole of the middle mold frame 4 is provided with a fixing assembly, and the movable slide rod 5 is fixed through the fixing assembly; the fixing assembly comprises a fixing sleeve 12 arranged at the position corresponding to the second guide hole of the outer wall of the end mold frame 2 and the position corresponding to the first guide hole of the middle mold frame 4, a fastening bolt 9 is arranged on the fixing sleeve 12, the fastening bolt 9 is used for fixing the fixed slide rod 3 and the movable slide rod 5 on the fixing sleeve 12, and the fixing assembly significantly enhances the overall structural stability of the mold device through the interaction of the fixing sleeve 12 and the fastening bolt 9. This helps to ensure the close cooperation and coordinated movement between the parts of the mold during the loading process.

[0049] The application also discloses a use method of the cyclic loading mold device for removing residual internal stress of the hard alloy blank.

[0050] According to the shape and size of the pressure surface of the hard alloy blank, the movable pressure head and the fixed pressure head are matched, and the movable pressure head and the fixed pressure head are connected through the second ball groove assembly;

[0051] The hard alloy blank is moved into the middle die frame of the first module, clamped by the clamping block, and the clamping block is connected with the movable slide rod through the first ball groove assembly, and one end of the slide rod is passed through the first guide groove;

[0052] One end of the movable pressure head connected with the fixed pressure head through the second ball groove assembly is tightly attached to the end face of the hard alloy blank, a guide sleeve is sleeved on the outside of the movable pressure head, and the center line angle between the fixed pressure head and the movable pressure head is adjusted to 180°; the fixed assembly is adjusted to fix the movable slide rod;

[0053] The fixed assembly is loosened after the residual internal stress of the hard alloy blank is removed by using a hydraulic device to cyclically load the fixed pressure head and cyclically load the hard alloy blank.

[0054] Further, the movable pressure head is matched according to the shape and size of the pressure surface of the hard alloy blank, the hard alloy blank is placed between the upper and lower movable pressure heads, the guide sleeve is tightly attached to the blank and the movable pressure head by adjusting the movable slide rod, and the movable slide rod is locked by the fastening screw on the middle die frame;

[0055] The selected fixed pressure head and movable pressure head are connected through the second ball groove assembly, then the end die frame is connected with the middle die frame and the cylindrical pin bolt is screwed, the fixed slide rod is adjusted so that the four fixed baffles are tightly attached to the fixed pressure head, and the center line angle between the fixed pressure head and the movable pressure head is 180°, and then the fixed slide rod is locked by the fastening screw on the end die frame;

[0056] The fixed pressure head is cyclically loaded by using a hydraulic device, and then the hard alloy blank is cyclically loaded, and after completion, the fastening bolt is loosened, the sample is unloaded, the mold is checked, and the removal of the residual internal stress of the hard alloy blank is completed.

[0057] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0058] Furthermore, it should be understood that although the specification is described in terms of embodiments, each of which contains only one independent technical solution, the specification is described in this way only for the sake of clarity, and the skilled person should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that the skilled person can understand. The above is only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made on the basis of the technical solutions according to the technical idea of the present application falls within the protection scope of the claims of the present application.

Claims

1. A cyclic loading die apparatus for removing residual internal stresses from cemented carbide blanks, characterized by, The first module includes a middle die frame (4) provided with a plurality of first guide holes, each of which is provided with a movable slide rod (5) extending into the middle die frame (4) and extending out of the middle die frame (4), and the inner end of the movable slide rod (5) is connected with a clamping block (11) through a first ball groove assembly, and the clamping block (11) is pushed on the side end face of the cemented carbide blank. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly.

2. The cyclic loading die apparatus for removing residual internal stress of cemented carbide blanks according to claim 1, wherein, The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly.

3. The cyclic loading die apparatus for removing residual internal stress of cemented carbide blanks according to claim 1, wherein The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly.

4. The cyclic loading die apparatus for removing residual internal stress of cemented carbide blanks according to claim 1, wherein The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly.

5. The cyclic loading die apparatus for removing residual internal stress of cemented carbide blanks according to claim 1, wherein The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly.

6. The cyclic loading die apparatus for removing residual internal stress of cemented carbide blanks according to claim 1, wherein The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. 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The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide hole, and the movable slide rod (5) is fixed through the fixed assembly. The middle die frame (4) is provided with a fixed assembly corresponding to the first guide 7. The cyclic loading die apparatus for removing residual internal stress of cemented carbide blanks according to claim 6, wherein The righting assembly comprises a fixed baffle (8), one side end surface of the fixed baffle (8) is attached to the side end surface of the fixed pressure head (1), a connecting table is arranged at the center position of the other side end surface of the fixed baffle (8), a threaded hole is arranged on the connecting table, one end of a fixed slide rod (3) is connected in the threaded hole, a second guide hole is arranged on the end mold frame (2), the other end of the fixed slide rod (3) extends to the outside of the end mold frame (2) through the second guide hole, the fixed assembly is also arranged on the end mold frame (2) at the position corresponding to the second guide hole, and the fixed assembly fixes the fixed slide rod (3).

8. The cyclic loading die apparatus for removing residual internal stress of cemented carbide blanks according to claim 7, wherein The fixed assembly comprises a fixing sleeve (12) arranged on the outer wall of the end mold frame (2) at the position corresponding to the second guide hole and on the middle mold frame (4) at the position corresponding to the first guide hole, a fastening bolt (9) is arranged on the fixing sleeve (12), and the fastening bolt (9) is used for fixing the fixed slide rod (3) and the movable slide rod (5) on the fixing sleeve (12).

9. The cyclic loading die apparatus for removing residual internal stress of cemented carbide blanks according to claim 6, wherein A threaded connection hole is arranged on the end surface of the middle mold frame (4), a through hole is arranged on the end surface of the end mold frame (2), a pin bolt (7) is arranged in the through hole, and the inner side end head of the pin bolt (7) is mounted in the threaded connection hole.

10. A method of using a cyclic loading die device for removing residual internal stresses from cemented carbide blanks, using the device according to any one of claims 1-9, characterized in that, The method comprises the following steps: According to the shape and size of the pressure surface of the hard alloy blank, a movable pressure head and a fixed pressure head are matched, the movable pressure head and the fixed pressure head are connected through a second ball groove assembly; The hard alloy blank is moved into the middle mold frame of the first module, clamped by a clamping block, the clamping block is connected with the movable slide rod through a first ball groove assembly, and one end of the slide rod passes through a first guide groove; One end of the movable pressure head connected with the movable pressure head in the second ball groove assembly is tightly attached to the end surface of the hard alloy blank, a guide sleeve is arranged outside the movable pressure head, the center line angle between the fixed pressure head and the movable pressure head is adjusted to 180°, and the movable slide rod is fixed by adjusting the fixed assembly; After the hard alloy blank is cyclically loaded by using a hydraulic device to cyclically load the fixed pressure head and remove the residual internal stress in the hard alloy blank, the fixed assembly is loosened, and the removal of the residual internal stress of the hard alloy blank is completed.

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