Bearing bush positioning lip stamping device

Abstract

The invention belongs to the technical field of bearing bush production and manufacturing, and particularly relates to a bearing bush positioning lip stamping device which comprises a base, a positioning seat, a stamping part, a stamping part and a stamping part. The female die is arranged at one end of the positioning groove; the punch is arranged opposite to the cavity; the material pressing part is arranged in a reciprocating motion mode in the first direction; the holding mechanism is arranged between the material pressing part and the base, and the holding mechanism is configured to be capable of holding the material pressing part and the base in a relatively fixed state and releasing the material pressing part from the relatively fixed state when the first limiting surface abuts against the target area. Through the synergistic effect of the material pressing part and the maintaining mechanism, protrusion deformation caused by material flowing in the stamping process is effectively restrained, the secondary machining link needed by a traditional technology is eliminated, and the production efficiency and the product consistency are remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing bush production and manufacturing, and particularly relates to a bearing bush positioning lip punching device. Background Art

[0002] The locating lip of a bearing shell is used to achieve circumferential and axial positioning between the bearing shell and the bearing seat. The locating lip of a thin-walled bearing shell is generally manufactured using a stamping process. However, due to the lack of constraints on the area surrounding the locating lip in existing stamping processes, the bearing shell material can flow toward the stamping area during the stamping process, resulting in bulges near the locating lip. For example, the bearing shell material accumulates around the stamping area along the inner arc of the bearing shell, resulting in bulges protruding from the inner arc of the bearing shell around the stamping area. Existing technology generally eliminates these bulges through secondary machining, but secondary machining not only increases process complexity but also leaves burrs on the bearing shell surface. In addition, some bearing shells have an alloy layer on the inner arc surface, which can be damaged by the aforementioned bulges and secondary machining. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a positioning lip punching device that can improve production efficiency and the forming quality of the inner arc surface of the bearing.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a bearing locating lip punching device, comprising a base, and: A positioning seat, wherein the positioning seat is provided with a positioning groove for receiving a bearing shell, wherein the positioning groove is configured to expose at least an inner arc surface of the received bearing shell; A die is provided at one end of the positioning groove, the die is configured to fit the outer arc surface of the received bearing shell, and the die is provided with a cavity; a punch disposed opposite to the die cavity, the punch being reciprocatingly disposed along a first direction so as to be able to approach or move away from the die; the first direction being a direction perpendicular to the axial direction of the received bearing shell; a pressing portion having a first limiting surface adapted to the inner arc surface of the received bearing shell, the pressing portion being arranged to reciprocate along the first direction so that the first limiting surface can abut against or separate from a target area of the inner arc surface of the bearing shell, the target area being an area adjacent to the punching area of the punch; A holding mechanism is arranged between the pressing part and the base. The holding mechanism is configured to keep the pressing part and the base in a relatively fixed state when the first limiting surface is in contact with the target area, and to release the pressing part from the relatively fixed state.

[0005] In an optional embodiment of the present invention, the holding mechanism includes a double-rod hydraulic cylinder and a shut-off valve. The double-rod hydraulic cylinder includes a cylinder body, a piston and a connecting rod. The piston is movably arranged in the cylinder body. The inner cavity of the cylinder body is divided into a first chamber and a second chamber by the piston. The two connecting rods are respectively connected to the two ends of the piston. The two connecting rods respectively pass through the two ends of the cylinder body to the outside of the cylinder body. The axial direction of the double-rod hydraulic cylinder is set parallel to the first direction. One of the cylinder body and the connecting rod is fixedly connected to the material pressing part, and the other is fixedly connected to the base. The first chamber and the second chamber are respectively connected to the shut-off valve through a pipeline, and the shut-off valve is used to control the connection or disconnection of the first chamber and the second chamber.

[0006] In an optional embodiment of the present invention, it further includes an upper die seat, which is movably connected to the base along the first direction, the punch is fixedly connected to the upper die seat, the pressing part is movably connected to the upper die seat along the first direction, and a first limiting part for limiting the movable stroke of the pressing part relative to the upper die seat is provided between the upper die seat and the pressing part, and a first elastic element is provided between the pressing part and the upper die seat, and the first elastic element is configured so that its elastic force can drive the pressing part to move downward relative to the upper die seat.

[0007] In an optional embodiment of the present invention, the upper die base is configured to have a first stroke, a second stroke and a third stroke along the first direction, and when the upper die base moves in the first stroke, the punch and the pressing part are simultaneously in a separated state from the bearing shell; when the upper die base moves in the second stroke, the pressing part and the bearing shell remain in a tight state, and the punch and the bearing shell are in a separated state; when the upper die base moves in the third stroke, the pressing part and the bearing shell remain in a tight state, and the punch can squeeze the bearing shell to form a positioning lip.

[0008] In an optional embodiment of the present invention, a trigger device is further included, wherein one of the trigger device and the stop valve is installed on the pressing part, and the other is installed on the upper die base; the trigger device is assembled so that when the upper die base moves toward the direction approaching the die within the second stroke, the trigger device controls the stop valve to close, and when the upper die base moves away from the die within the second stroke, the trigger device controls the stop valve to open.

[0009] In an optional embodiment of the present invention, the stop valve is a travel switch stop valve, which includes a trigger rod, and the trigger rod is configured to conduct the stop valve when the trigger rod is pressed, and to close the stop valve when the trigger rod is released; the trigger device includes a wedge block cooperating with the trigger rod, and the wedge block is assembled so that when the upper mold base moves relative to the pressing part in a direction away from the die, the wedge block can press the trigger rod, and when the upper mold base moves relative to the pressing part in a direction close to the die, the wedge block can release the trigger rod.

[0010] In an optional embodiment of the present invention, the valve housing of the stop valve and the material pressing portion are fixedly arranged relative to each other, and the wedge block and the upper die seat are fixedly arranged relative to each other.

[0011] In an optional embodiment of the present invention, the die also includes a second limiting surface that cooperates with the end face of the bearing shell, and the end face of the bearing shell refers to the splicing surface when the bearing shell is spliced with another bearing shell in the use state; the area of the second limiting surface corresponding to the positioning lip is formed on a movable insert, and the movable insert is movably arranged along a second direction, and the second direction is a direction parallel to the second limiting surface and perpendicular to the axis of the bearing shell; the movable insert is arranged relative to the punch so that the punch can push the movable insert to move along the second direction when it moves in the third stroke.

[0012] In an optional embodiment of the present invention, a second elastic element is provided between the movable insert and the positioning seat, and the second elastic element is configured so that its elastic force can drive the movable insert to move in a direction close to the bearing axis.

[0013] In an optional embodiment of the present invention, a second limiting portion for limiting the movable stroke of the movable insert is provided between the movable insert and the positioning seat.

[0014] The technical effect of the present invention is that: through the coordinated action of the pressing part and the retaining mechanism, the present invention first presses and locks the target area of the inner arc surface of the bearing before the punch punches the positioning lip, effectively suppressing the convex deformation caused by material flow during the stamping process, thereby directly obtaining a smooth inner arc surface forming quality, which not only eliminates the secondary machining steps required by the traditional process, but also significantly improves production efficiency and product consistency, and realizes high-precision processing of the bearing positioning lip in one forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional diagram of a bearing bush provided by an embodiment of the present invention; Figure 2 is a three-dimensional diagram of a bearing locating lip punching device provided by an embodiment of the present invention; Figure 3 is a cross-sectional view of a bearing locating lip punching device provided by an embodiment of the present invention; Figure 4 This is a three-dimensional diagram of the assembly state of the punch and the pressing part provided by an embodiment of the present invention; Figure 5 This is a bottom view of the assembled state of the punch and the pressing part provided by an embodiment of the present invention; Figure 6 yes Figure 5 AA cross-sectional view; Figure 7 yes Figure 5 BB cross-sectional view; Figure 8 It is an exploded view of the positioning seat and the die provided in the embodiment of the present invention. DETAILED DESCRIPTION

[0016] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0017] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0018] Figure 1 The figure shows a bearing 10 suitable for the present invention. In the existing process, when forming the positioning lip 14, a bulge is formed around the stamping area (i.e., the target area 15 shown in the shaded portion), affecting the forming quality of the inner arc surface of the bearing 10. To address this technical problem, the present invention compresses this area with a pressing portion 50 before stamping, and locks the pressing portion 50 with a retaining mechanism to prevent the pressing portion 50 from lifting due to the stress of the bearing 10 during the stamping process. The pressing portion 50 can prevent the inner arc surface of the bearing 10 from bulging during the stamping process, thereby improving the forming quality of the bearing 10, eliminating the need for secondary machining, and increasing production efficiency.

[0019] See also Figure 2-8 As shown, the technical solution of the present invention is described in detail below with reference to specific embodiments: See also Figure 2-8As shown, the embodiment of the invention provides a bearing 10 positioning lip 14 stamping device including a base 100, and a positioning seat 20, a die 30, a punch 40, a pressing portion 50 and a retaining mechanism arranged on the base 100. The positioning seat 20 is provided with a positioning groove 201 for accommodating the bearing 10, and the positioning groove 201 is configured to enable at least the inner arc surface 11 of the accommodated bearing 10 to be exposed; the die 30 is arranged at one end of the positioning groove 201, and the die 30 is configured to be able to fit with the outer arc surface 12 of the accommodated bearing 10, and the die 30 is provided with a cavity 301; the punch 40 is arranged opposite to the cavity 301, and the punch 40 is arranged to reciprocate along a first direction so that the punch 40 can approach or move away from the die 30; the first direction is a direction perpendicular to the axial direction of the accommodated bearing 10; the pressing portion 50 has a relative position to the accommodated bearing 10, the pressing part 50 is arranged to reciprocate along the first direction so that the first limiting surface 501 can be pressed against or separated from the target area 15 of the inner arc surface 11 of the bearing shell 10, and the target area 15 is the area adjacent to the stamping area of the punch 40; the holding mechanism is arranged between the pressing part 50 and the base 100, and the holding mechanism is configured to keep the pressing part 50 and the base 100 in a relatively fixed state when the first limiting surface 501 is pressed against the target area 15, and can release the pressing part 50 from the relatively fixed state. The present invention, through the synergistic effect of the pressing part 50 and the retaining mechanism, first presses and locks the target area 15 of the inner arc surface 11 of the bearing shell 10 before the punch 40 punches the positioning lip 14, effectively suppressing the convex deformation caused by material flow during the stamping process, thereby directly obtaining the smooth forming quality of the inner arc surface 11, not only eliminating the secondary machining steps required by the traditional process (avoiding burrs and damage to the alloy layer), but also significantly improving production efficiency and product consistency, and realizing high-precision processing of the positioning lip 14 of the bearing shell 10 in one forming.

[0020] See also Figure 4-7As shown, in an optional embodiment of the present invention, the holding mechanism includes a double-rod hydraulic cylinder 70 and a shut-off valve 80, the double-rod hydraulic cylinder 70 includes a cylinder body 71, a piston 72 and a connecting rod 73, the piston 72 is movably arranged in the cylinder body 71, the inner cavity of the cylinder body 71 is divided into a first chamber and a second chamber by the piston 72, the two connecting rods 73 are respectively connected to the two ends of the piston 72, and the two connecting rods 73 respectively pass through the two ends of the cylinder body 71 to the outside of the cylinder body 71, the axial direction of the double-rod hydraulic cylinder 70 is arranged parallel to the first direction, one of the cylinder body 71 and the connecting rod 73 is fixedly connected to the pressing part 50, and the other is fixedly connected to the base 100, the first chamber and the second chamber are respectively connected to the shut-off valve 80 through a pipeline, and the shut-off valve 80 is used to control the connection or disconnection of the first chamber and the second chamber. This further embodiment adopts a double-rod hydraulic cylinder 70 and a stop valve 80 to form a holding mechanism, and realizes the rigid locking of the pressing part 50 through the hydraulic locking principle: when the stop valve 80 is closed, the oil circuits of the two chambers of the hydraulic cylinder are cut off, and the relative positions of the piston 72 and the cylinder body 71 are fixed, so that the pressing part 50 maintains a stable pressing force during the stamping process, avoiding the pressing part 50 from retreating due to material stress; at the same time, the double-rod symmetrical structure balances the internal force of the hydraulic cylinder, ensures that the volume increase and decrease of the first chamber and the second chamber are synchronized, improves the locking reliability, ensures that the target area 15 is subjected to uniform pressure throughout the stamping process, and further guarantees the forming accuracy and consistency of the inner arc surface 11 of the bearing shell 10.

[0021] See also Figure 2-7 As shown, in an optional embodiment of the present invention, an upper die base 60 is further included, and the upper die base 60 is movably connected to the base 100 along the first direction, the punch 40 is fixedly connected to the upper die base 60, and the pressing part 50 is movably connected to the upper die base 60 along the first direction, and a first limiting part 52 for limiting the movable stroke of the pressing part 50 relative to the upper die base 60 is provided between the upper die base 60 and the pressing part 50, and a first elastic element 51 is provided between the pressing part 50 and the upper die base 60, and the first elastic element 51 is configured so that its elastic force can drive the pressing part 50 to move downward relative to the upper die base 60. This further embodiment integrates the punch 40 and the pressing part 50 through the upper die base 60, and provides a first limiting part 52 and a first elastic element 51, thereby realizing the pre-tightening function of the pressing part 50: before the punch 40 contacts the bearing 10, the elastic element drives the pressing part 50 to first press the target area 15 to form an initial constraint; when the upper die base 60 continues to descend during the stamping process, the limiting part ensures that the pressing part 50 maintains a certain pressure, forming a dynamic constraint on the stamping area, which not only optimizes the material flow control effect, but also simplifies the device structure, so that the stamping and pressing actions are coordinated and synchronized, further improving the forming accuracy and process stability of the positioning lip 14.

[0022] In a specific embodiment, a drive post 62 may be connected to the upper die base 60. The drive post 62 may form a guide with a crossbeam provided on the base 100. The crossbeam may be provided with a driving element, such as a hydraulic cylinder, for driving the drive post 62 up and down. To further improve the operational stability of the upper die base 60, a guide sleeve 61 may be provided on the upper die base 60, and a guide post 110 may be provided on the base 100 to cooperate with the guide sleeve 61.

[0023] The upper die base 60 is configured to have a first stroke, a second stroke and a third stroke along the first direction. When the upper die base 60 moves in the first stroke, the punch 40 and the pressing portion 50 are simultaneously separated from the bearing shell 10; when the upper die base 60 moves in the second stroke, the pressing portion 50 and the bearing shell 10 remain in a tight state, and the punch 40 and the bearing shell 10 are in a separated state; when the upper die base 60 moves in the third stroke, the pressing portion 50 and the bearing shell 10 remain in a tight state, and the punch 40 can squeeze the bearing shell 10 to form the locating lip 14. This further embodiment optimizes the timing of the pressing and punching actions by dividing the movement of the upper die base 60 into three precisely controlled stroke stages: the first stroke achieves rapid approach to the workpiece, the second stroke ensures that the pressing portion 50 fully presses the target area 15 to form a stable constraint, and the third stroke performs the stamping and forming of the locating lip 14. This phased sequential control effectively avoids material flow problems caused by insufficient pressing in traditional processes. At the same time, it ensures the accuracy of process timing through mechanical linkage, which not only improves the stability of molding quality but also improves equipment operation efficiency.

[0024] See also Figure 4 、 5 As shown in Figures 7 and 8, an optional embodiment of the present invention further includes a trigger device, one of which is mounted on the pressing portion 50 and the other on the upper die holder 60. The trigger device is configured to close the shutoff valve 80 when the upper die holder 60 moves toward the die 30 during the second stroke, and to open the shutoff valve 80 when the upper die holder 60 moves away from the die 30 during the second stroke. This further embodiment achieves automated and precise triggering of the hydraulic lock through the coordinated control of the trigger device and the shutoff valve 80. When the upper die holder 60 enters the second stroke (pressing phase), the shutoff valve 80 automatically closes, locking the pressing portion 50 and ensuring constant pressing force during the stamping phase. During the return stroke, the hydraulic circuit automatically opens to release the pressing portion 50, creating a seamless transition between the pressing and stamping processes. This integrated design eliminates manual intervention errors and ensures process reliability through mechanical timing control, enabling the entire device to operate efficiently while maintaining stable molding quality.

[0025] It should be understood that in some alternative embodiments, the most basic function of the holding mechanism can also be achieved by manually triggering the shut-off valve 80 .

[0026] See also Figure 4 、 5 As shown in Figures 7 and 7, in an optional embodiment of the present invention, the stop valve 80 is a travel switch stop valve, which includes a trigger rod 81, and the trigger rod 81 is configured to conduct the stop valve 80 when the trigger rod 81 is pressed, and to close the stop valve 80 when the trigger rod 81 is released; the trigger device includes a wedge block 63 cooperating with the trigger rod 81, and the wedge block 63 is assembled so that when the upper mold base 60 moves relative to the pressing part 50 in a direction away from the die 30, the wedge block 63 can press the trigger rod 81, and when the upper mold base 60 moves relative to the pressing part 50 in a direction close to the die 30, the wedge block 63 can release the trigger rod 81. This further embodiment achieves automatic switching of the hydraulic locking state through the mechanical linkage design of the wedge block 63 and the travel switch stop valve: when the upper die holder 60 descends, the wedge block 63 disengages the trigger rod 81, closing the stop valve 80 and keeping the press 50 locked. When the upper die holder 60 returns, the inclined surface of the wedge block 63 pushes the trigger rod 81, opening the oil circuit and automatically releasing the lock. This purely mechanical trigger mechanism not only responds quickly and is highly reliable, but also requires no additional power source, simplifying the control system. At the same time, the rigid contact ensures precise synchronization of each action, further improving the equipment's operational stability and process repeatability.

[0027] In some embodiments, the valve housing of the shut-off valve 80 can be fixedly mounted relative to the material pressing portion 50, and the wedge block 63 can be fixedly mounted relative to the upper die base 60. However, it should be noted that the installation positions of the shut-off valve 80 and the wedge block 63 are not limited. For example, in other embodiments, the shut-off valve 80 can be mounted on the upper die base 60, and the wedge block 63 can be mounted on the material pressing portion 50.

[0028] It should be understood that the triggering method of the stop valve 80 is not unique. For example, in some alternative embodiments, the stop valve 80 can also be set as an electromagnetic stop valve, and a stroke detection device (such as a photoelectric sensor, a stroke switch) is set to detect the relative position of the pressing part 50 and the punch 40. The detection device sends a detection signal to the controller, and the controller controls the opening and closing of the stop valve 80 according to the detection signal.

[0029] See also Figure 2 、 3As shown in Figure 8, in an optional embodiment of the present invention, the die 30 further includes a second limiting surface 302 that cooperates with the end face of the bearing 10, and the end face of the bearing 10 refers to the splicing surface when the bearing 10 is spliced with another bearing 10 in the use state; the area of the second limiting surface 302 corresponding to the positioning lip 14 is formed on a movable insert 31, and the movable insert 31 is movably arranged along a second direction, and the second direction is a direction parallel to the second limiting surface 302 and perpendicular to the axis of the bearing 10; the movable insert 31 is arranged opposite to the punch 40, so that the punch 40 can push the movable insert 31 to move along the second direction when moving in the third stroke. It should be noted that in the traditional stamping process, the bearing 10 material will bulge not only toward the inner arc surface 11, but also toward the end face of the bearing 10. For this reason, the present invention further provides a second limiting surface 302 to constrain the end face of the bearing 10. This further embodiment realizes the constraint of the end face material of the bearing 10 through the design of the second limiting surface 302 of the movable insert 31: during the stamping process, the punch 40 pushes the movable insert 31 to move synchronously, so that the second limiting surface 302 always fits the end face of the bearing 10, effectively suppressing the flow and deformation of the material toward the end face; this dynamic following constraint method solves the end face bulging problem caused by traditional processes, while ensuring the molding accuracy of the positioning lip 14, maintaining the geometric integrity of the splicing surface of the bearing 10, providing a guarantee for the subsequent assembly quality.

[0030] See also Figure 3 、 8 As shown, in an optional embodiment of the present invention, a second elastic element 32 is disposed between the movable insert 31 and the positioning seat 20. The elastic force of the second elastic element 32 is configured to drive the movable insert 31 toward the axis of the bearing shell 10. This further embodiment, through the provision of the second elastic element 32, enables the movable insert 31 to automatically return to its initial position after stamping is completed. This not only simplifies the mechanical control structure of the insert return stroke, but also ensures that the insert is accurately positioned before each stamping operation, providing stable and reliable dynamic constraints for continuous stamping operations, effectively improving the equipment's operating efficiency and process stability.

[0031] See also Figure 3 、 8 As shown, in an optional embodiment of the present invention, a second limiter 33 is provided between the movable insert 31 and the positioning seat 20 to limit the movable travel of the movable insert 31. This further embodiment, through the provision of the second limiter 33, precisely controls the range of motion of the movable insert 31, ensuring that the insert can fully abut the end face of the bearing shell 10 to inhibit material flow during the stamping process, while also preventing mechanical interference or wear caused by overtravel. This improves forming accuracy while enhancing the reliability and service life of the equipment.

[0032] In summary, the present invention, through the synergistic effect of the pressing portion 50 and the holding mechanism, first presses and locks the target area 15 of the inner arc surface 11 of the bearing shell 10 before the punch 40 punches the positioning lip 14, effectively suppressing the convex deformation caused by the flow of material during the punching process, thereby directly obtaining the flat inner arc surface 11 forming quality, not only eliminating the secondary machining steps required by the traditional process (avoiding burrs and alloy layer damage), but also significantly improving production efficiency and product consistency, and realizing high-precision processing of the positioning lip 14 of the bearing shell 10 in one step; the present invention adopts a double-rod The hydraulic cylinder 70 and the stop valve 80 constitute a holding mechanism, which realizes the rigid locking of the pressing part 50 through the hydraulic locking principle: when the stop valve 80 is closed, the oil circuits of the two chambers of the hydraulic cylinder are cut off, and the relative positions of the piston 72 and the cylinder body 71 are fixed, so that the pressing part 50 maintains a stable pressing force during the stamping process, avoiding the pressing part 50 from retreating due to material stress; at the same time, the double-rod symmetrical structure balances the internal force of the hydraulic cylinder, ensuring that the volume increase and decrease of the first chamber and the second chamber are synchronized, improving the locking reliability, ensuring that the target area 15 is subjected to uniform pressure throughout the stamping process, and further ensuring The forming accuracy and consistency of the inner arc surface 11 of the bearing shell 10; the present invention realizes the automatic and precise triggering of the hydraulic locking through the linkage control of the trigger device and the stop valve 80: when the upper die base 60 enters the second stroke (pressing stage), the stop valve 80 is automatically closed to lock the pressing part 50, ensuring that the pressing force is maintained at a constant level during the stamping stage; during the return stroke, the oil circuit is automatically opened to release the pressing part 50, forming a seamless connection between the pressing and stamping processes. This integrated design not only eliminates the error of manual intervention, but also ensures the process reliability through mechanical timing control, so that the whole device can operate efficiently. At the same time, it maintains stable molding quality; the present invention realizes the constraint of the end face material of the bearing 10 through the design of the second limiting surface 302 of the movable insert 31: during the stamping process, the punch 40 pushes the movable insert 31 to move synchronously, so that the second limiting surface 302 always fits the end face of the bearing 10, effectively suppressing the flow and deformation of the material toward the end face; this dynamic following constraint method solves the end face bulging problem caused by traditional processes, while ensuring the molding accuracy of the positioning lip 14, maintaining the geometric integrity of the splicing surface of the bearing 10, providing a guarantee for the subsequent assembly quality.

[0033] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

[0034] In the description herein, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of the specific details or with other devices, systems, assemblies, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

Claims

1. A bearing locating lip punching device, characterized in that: The invention comprises a base, and the following components arranged on the base: A positioning seat, wherein the positioning seat is provided with a positioning groove for receiving a bearing shell, wherein the positioning groove is configured to expose at least an inner arc surface of the received bearing shell; A die is provided at one end of the positioning groove, the die is configured to fit the outer arc surface of the received bearing shell, and the die is provided with a cavity; a punch, disposed opposite to the die cavity, and configured to reciprocate along a first direction so as to enable the punch to approach or move away from the die; The first direction is a direction perpendicular to the axial direction of the received bearing shell; a pressing portion having a first limiting surface adapted to the inner arc surface of the received bearing shell, the pressing portion being arranged to reciprocate along the first direction so that the first limiting surface can abut against or separate from a target area of the inner arc surface of the bearing shell, the target area being an area adjacent to the punching area of the punch; A holding mechanism is arranged between the pressing part and the base. The holding mechanism is configured to keep the pressing part and the base in a relatively fixed state when the first limiting surface is in contact with the target area, and to release the pressing part from the relatively fixed state.

2. The bearing locating lip punching device according to claim 1, characterized in that: The holding mechanism includes a double-rod hydraulic cylinder and a shut-off valve. The double-rod hydraulic cylinder includes a cylinder body, a piston and a connecting rod. The piston is movably arranged in the cylinder body. The inner cavity of the cylinder body is divided into a first chamber and a second chamber by the piston. The two connecting rods are respectively connected to the two ends of the piston. The two connecting rods respectively pass through the two ends of the cylinder body to the outside of the cylinder body. The axial direction of the double-rod hydraulic cylinder is set parallel to the first direction. One of the cylinder body and the connecting rod is fixedly connected to the material pressing part, and the other is fixedly connected to the base. The first chamber and the second chamber are respectively connected to the shut-off valve through a pipeline. The shut-off valve is used to control the connection or disconnection of the first chamber and the second chamber.

3. The bearing locating lip punching device according to claim 2, characterized in that: It also includes an upper die seat, which is movably connected to the base along the first direction, the punch is fixedly connected to the upper die seat, the pressing part is movably connected to the upper die seat along the first direction, and a first limiting part for limiting the movable stroke of the pressing part relative to the upper die seat is provided between the upper die seat and the pressing part, and a first elastic element is provided between the pressing part and the upper die seat, and the first elastic element is configured so that its elastic force can drive the pressing part to move downward relative to the upper die seat.

4. The bearing locating lip punching device according to claim 3, characterized in that: The upper die seat is configured to have a first stroke, a second stroke and a third stroke along the first direction. When the upper die seat moves in the first stroke, the punch and the pressing part are simultaneously in a separated state from the bearing shell; when the upper die seat moves in the second stroke, the pressing part and the bearing shell remain in a tight state, and the punch and the bearing shell are in a separated state; when the upper die seat moves in the third stroke, the pressing part and the bearing shell remain in a tight state, and the punch can squeeze the bearing shell to form a positioning lip.

5. The bearing locating lip punching device according to claim 4, characterized in that: It also includes a trigger device, one of the trigger device and the stop valve is installed on the pressing part, and the other is installed on the upper mold base; the trigger device is assembled so that when the upper mold base moves toward the direction close to the die within the second stroke, the trigger device controls the stop valve to close, and when the upper mold base moves away from the die within the second stroke, the trigger device controls the stop valve to be opened.

6. The bearing locating lip punching device according to claim 5, characterized in that: The stop valve is a travel switch stop valve, which includes a trigger rod, and the trigger rod is configured to conduct the stop valve when the trigger rod is pressed, and close the stop valve when the trigger rod is released; the trigger device includes a wedge block that cooperates with the trigger rod, and the wedge block is assembled so that when the upper mold base moves in a direction away from the die relative to the pressing part, the wedge block can press the trigger rod, and when the upper mold base moves in a direction close to the die relative to the pressing part, the wedge block can release the trigger rod.

7. The bearing locating lip punching device according to claim 6, characterized in that: The valve housing of the stop valve is fixedly arranged relative to the material pressing portion, and the wedge block is fixedly arranged relative to the upper die seat.

8. The bearing locating lip punching device according to claim 4, characterized in that: The die also includes a second limiting surface that cooperates with the end face of the bearing shell, and the end face of the bearing shell refers to the splicing surface when the bearing shell is spliced with another bearing shell in the use state; the area of the second limiting surface corresponding to the positioning lip is formed on a movable insert, and the movable insert is movably arranged along the second direction, and the second direction is a direction parallel to the second limiting surface and perpendicular to the axis of the bearing shell; the movable insert is arranged relative to the punch so that the punch can push the movable insert to move along the second direction when it moves in the third stroke.

9. The bearing locating lip punching device according to claim 8, characterized in that: A second elastic element is provided between the movable insert and the positioning seat, and the second elastic element is configured such that its elastic force can drive the movable insert to move in a direction close to the axis of the bearing bush.

10. The bearing locating lip punching device according to claim 9, characterized in that: A second limiting portion for limiting the movable stroke of the movable insert is provided between the movable insert and the positioning seat.

Images