Automatic bending equipment of nail machine type and working method

Abstract

The application discloses a kind of automatic bending equipment of nail machine type and working method, comprising: rotating disc upper circular array is provided with multiple lower pressing mould, the blanking die is used to place the bearing retainer that is not bent on the lower pressing mould, sensor is provided on the material testing die, and the blanking die and material taking die are respectively provided with independent mechanical hand;The upper pressing mould includes the upper die seat that is arranged in the lower end of the working arm, the core of the upper die seat is provided with buffer mechanism, the lower end of the upper die seat is provided with upper clamping plate and bending plate, and the bending plate is arranged in the lower end of the upper clamping plate;The upper portion of the working arm is provided with spring cover plate, the upper portion of the spring cover plate is provided with material return cylinder and cylinder fixed seat;The lower pressing mould is composed of bending concave mould, lower buffer mechanism and lower pressing mould. It can realize unmanned operation from feeding, detection, bending and taking material complete process, and also solve the problem that material is not placed in place and taking material is not timely.

Description

Technical Field

[0001] This invention belongs to the technical field of bearing cage stamping equipment, specifically relating to an automatic bending device and its working method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, bearing cage production is a crucial step in the bearing manufacturing industry. Bearing cage bending is mostly done semi-automatically, which is not only inefficient but also suffers from limited stability and precision, leading to inconsistent product quality. During semi-automatic bending, workers are required to place and retrieve parts for extended periods, performing repetitive mechanical actions, resulting in high labor intensity, fatigue, and operational errors, ultimately increasing the defect rate.

[0004] Existing automated bending equipment suffers from complex structures and high costs. Furthermore, current automated equipment cannot fully automate the entire process of bearing cage bending, from feeding and inspection to retrieving. During bending, it is difficult to effectively guarantee the positioning accuracy and bending quality of the bearing cage. Some equipment cannot precisely control the bending force and angle, resulting in unsatisfactory bending effects on the bearing cage, affecting the overall performance and service life of the bearing. In addition, equipment that only performs material conveying and retrieving tasks often experiences issues such as improper material placement and untimely retrieving, failing to maximize production efficiency. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an automatic bending device and its working method that can achieve unmanned operation of the entire process from material feeding, inspection, bending, and material removal. It also solves the problems of improper material placement and untimely material removal, thereby improving production efficiency. It can accurately position and control the bending force and angle to ensure the bending effect of the bearing cage.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] In a first aspect, the present invention provides an automatic bending device of the nail-threading type, comprising: a blanking die, an inspection die, an upper pressing die, a picking die, a rotating disk, and a lower pressing die; the rotating disk is provided with a plurality of lower pressing dies arranged in a circular array, the blanking die is used to place an unbent bearing cage onto the lower pressing die, the inspection die is provided with a sensor to verify whether a bearing cage is placed on the lower pressing die, the picking die is used to pick up the bent bearing cage, and the blanking die and the picking die are each provided with an independent robotic arm;

[0008] The upper die is fixedly mounted on the working arm of the punch press. The upper die includes an upper die base located at the lower end of the working arm. A buffer mechanism is provided in the core of the upper die base. An upper clamping plate and a bending plate are provided at the lower end of the upper die base, with the bending plate located at the lower end of the upper clamping plate. A spring cover plate is provided above the working arm, and a material ejection cylinder and a cylinder fixing seat are provided above the spring cover plate. Two guide pillars are also provided on the upper die base for positioning when combined with the lower die. The lower die consists of a bending die, a lower buffer mechanism, and a lower die. The bending die and the lower buffer mechanism are located in the cavity of the lower die. The bending die achieves bending of the part under the action of the lower buffer mechanism.

[0009] Furthermore, the blanking die includes a transition support, a blanking cylinder, flat claws, pointed claws, a rotating block, and a guide rod; the transition support is disposed on the top of the side of the blanking cylinder, the guide rod is disposed on the top of the blanking cylinder, multiple flat claws and pointed claws are provided and evenly distributed at intervals in the guide channel at the bottom of the blanking cylinder, the rotating block is rotatably disposed on the outer side wall of the blanking cylinder, and a driving block is provided on the outer side wall of the rotating block for driving the flat claws and pointed claws to move along the guide channel in a direction away from the axis of the blanking cylinder; one end of the flat claw is provided with a driven block and a spring mounting groove, and the other end is provided with a square protrusion; one end of the pointed claw is provided with a driven block and a spring mounting groove, and the other end is provided with a conical protrusion; the same annular spring is installed in the spring mounting grooves of multiple flat claws and pointed claws.

[0010] Furthermore, the material-retrieving mold includes a material-retrieving bracket, a material-retrieving cylinder, a material-retrieving claw, and a material-retrieving spring; the top of the material-retrieving cylinder is provided with a material-retrieving bracket, and the bottom of the material-retrieving cylinder is provided with a claw groove for installing the material-retrieving claw; one end of the material-retrieving claw is hinged to the material-retrieving cylinder, and the other end is provided with a pointed hook, the pointed hook facing the inside of the material-retrieving cylinder; the bottom of the outer side of the material-retrieving cylinder and the material-retrieving claw are both provided with spring mounting grooves for tightening the material-retrieving claw to be flush with the side wall of the material-retrieving cylinder.

[0011] Furthermore, the buffer mechanism includes a first spring, a bending top block is provided below the first spring, a slider seat fixing plate is provided below the bending top block, and the upper end of the first spring abuts against the spring cover plate; the lower end of the slider seat fixing plate is provided with an upper pressure head, which is located in the vertical slide at the center of the upper clamping plate and the bending plate, for performing a first bending of the part; the lower end of the vertical slide of the bending plate is provided with a chamfer for performing a second bending of the part.

[0012] Furthermore, the upper pressure head comprises a bending slider seat, multiple bending sliders, and a positioning block; the upper end of the bending slider seat is fixedly connected to the slider seat fixing plate, and the lower end of the bending slider seat is connected to the positioning block through a damping element; the multiple bending sliders are slidably disposed on the side of the bending slider seat.

[0013] The bending slider seat is frustum-shaped, and multiple bending sliders are connected to the bending slider seat through dovetail grooves; the bending slider is wedge-shaped, and multiple bending sliders and the bending slider seat together form a cylindrical shape; a boss is provided at the lower end of the outer arc surface of the bending slider along the axial direction.

[0014] Furthermore, a material ejection mechanism is provided in the cavity of the bending top block. The material ejection mechanism includes a second spring, a thrust plate, and a push rod mounting seat. The lower end of the second spring abuts against the slider seat fixing plate, and the upper end abuts against the push rod mounting seat. The upper end of the push rod mounting seat is fixedly connected to the thrust plate. The telescopic rod of the material ejection cylinder passes through the cylinder fixing plate, the spring cover plate, and the bending top block and abuts against the thrust plate. A punch is provided at the end of the telescopic rod of the material ejection cylinder to push the thrust plate and disperse the impact load on the thrust plate. Multiple push rods are provided on the push rod mounting seat. The number of push rods is the same as the number of bending sliders and corresponds one-to-one.

[0015] Furthermore, the lower die consists of a lower die base, a lower clamping plate, and a lower cover plate; the lower die base is located below the lower clamping plate, and the lower cover plate is located above the lower clamping plate; the lower die base is fixedly mounted on the worktable of the punch press.

[0016] Furthermore, the lower buffer mechanism includes a third spring, a fourth spring, a die ejector rod, and a float ejector rod; the third spring and the fourth spring are disposed within a cavity formed between the core of the lower die holder and the lower clamping plate; the diameter of the fourth spring is smaller than that of the third spring, and the fourth spring is disposed at the center of the third spring; a sliding ring is disposed at the top end of the third spring, and multiple die ejector rods are arranged circumferentially on the sliding ring; a float ejector rod is disposed at the top end of the fourth spring.

[0017] Furthermore, an inner die and an outer bending float are slidably disposed on the lower cover plate in the direction perpendicular to the normal. The die push rod passes through the lower clamping plate and is connected to the bottom end of the inner die, and the float push rod passes through the lower clamping plate and is connected to the bottom end of the outer bending float.

[0018] Secondly, the present invention also provides a method for operating a nail-threading type automatic bending device, comprising the following steps:

[0019] S1. The blanking die moves to directly above the lower die, the rotating block rotates clockwise, the flat claw moves away from the axis of the blanking cylinder, and the lowest bearing retainer in the blanking cylinder on the square protrusion falls onto the lower die; the inspection die checks whether the bearing retainer on the lower die base is in place through a sensor. If it is not in place, an alarm is triggered and the machine stops. If it is in place, the next step is performed.

[0020] S2. Driven by the working arm of the punch press, the upper die slowly moves downward, and the positioning block begins to contact the bearing cage on the lower die; the upper die continues to move downward, the first spring begins to contract, the positioning block begins to position the bearing cage on the lower die, the inner die moves downward, the fourth spring begins to contract, the outer bending float stops, and under the pressure of the inner wall of the outer bending float and the lower end face of the boss, the bending claw of the bearing cage performs its first 90° bend;

[0021] S3. The upper die continues to move downward, the bending plate begins to contact the outer bending float, the outer bending float begins to move downward until the bending plate contacts the bent claw of the bearing cage; the upper die continues to move downward, the bending plate performs a second 30° bend on the bent claw of the bearing cage until the bent claw is bent to adhere to the upper surface of the boss;

[0022] S4. The upper die is reset. At this time, the telescopic rod of the ejector cylinder moves and pushes the push plate downward. The second spring begins to contract. The push rod pushes the bending slider to move downward. At this time, the diameter of the cylinder formed by the multiple bending sliders decreases. The damping element is stretched until the bearing cage disengages from the upper die.

[0023] S5. The ejector cylinder stops operating, the second spring and damping element reset, the bending slider resets, and then the rotating disk rotates to perform the next bending.

[0024] S6. The material taking mold moves to the bent lower die, the material taking cylinder moves down, the inclined surface of the material taking claw contacts the bearing retainer and then opens, and the material taking claw is tightened by the spring. After the bearing retainer is caught on the sharp hook of the claw, the material taking mold sends the bearing retainer to the next process.

[0025] Compared with the prior art, the advantages and positive effects of this invention are:

[0026] The bending equipment of this invention includes multiple parts such as a blanking die, an inspection die, an upper pressing die, a picking die, a rotating disk, and a lower pressing die. The blanking die and the picking die are each equipped with an independent robotic arm, enabling automated operation of a series of processes from placing the unbent bearing cage, verifying placement, performing the bending operation, to picking up the bent bearing cage, reducing manual intervention. The inspection die is equipped with a sensor to verify whether a bearing cage is placed on the lower pressing die, preventing invalid operations due to the absence of a bearing cage on the lower pressing die, and also preventing product quality problems caused by repeated placement errors. The rotating disk has a circular array of multiple lower pressing dies, allowing simultaneous operation on multiple bearing cages at different stages. Furthermore, a buffer mechanism is provided in the core of the upper die holder; the presence of a first spring effectively buffers the impact force when the upper pressing die moves downward, not only preventing damage to the parts but also allowing the positioning block to more accurately position the bearing cage. Meanwhile, the two guide pillars on the upper die base can be precisely positioned when combined with the lower die, which greatly improves the accuracy of the entire bending process and ensures the consistency and stability of the product.

[0027] This invention achieves a double bending of the part by designing a boss along the axial direction at the lower end of the outer arc surface of the bending slider. The upper pressure head at the lower end of the slider seat fixing plate first bends the part, and then the chamfer at the lower end of the vertical slide of the bending plate performs a second bend. This design not only meets complex process requirements, but also ensures that the bent claws can tightly adhere to the upper surface of the boss after bending, thus improving product quality.

[0028] The present invention features a material ejection mechanism installed in the cavity of the bending top block. Under the action of the telescopic rod of the material ejection cylinder, the second spring contracts, and the top rod pushes the bending slider downward, thereby reducing the diameter of the cylinder formed by multiple bending sliders and stretching the damping element. This allows the bearing cage to smoothly disengage from the upper die, effectively solving the problem of difficult material ejection in traditional devices and greatly improving production efficiency.

[0029] The buffer mechanism of this invention consists of a third spring, a fourth spring, a die push rod, and a float push rod. The use of springs of different diameters allows the inner die and the outer bending float to move flexibly and in a layered manner according to the downward pressing action of the upper die. This ensures bending accuracy and can adapt to parts of different materials and specifications, thus enhancing the versatility of the equipment. Attached Figure Description

[0030] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0031] Figure 1 This is a top view of the overall structure of the automatic bending device of the present invention;

[0032] Figure 2 This is a structural diagram of the blanking die of the automatic bending equipment of the present invention;

[0033] Figure 3 This is a structural diagram of the upper pressure die of the automatic bending equipment of the present invention;

[0034] Figure 4 This is a structural diagram of the material handling die of the automatic bending equipment of the present invention;

[0035] Figure 5 This is a structural diagram of the lower pressure die of the automatic bending device of the present invention.

[0036] In the diagram: 1. Blanking die; 101. Transition bracket; 102. Blanking cylinder; 103. Rotating block; 104. Flat claw; 105. Pointed claw; 106. Guide rod; 107. Guide channel; 2. Inspection die; 3. Upper die; 301. Working arm; 302. Upper die base; 303. Upper clamping plate; 304. Bending plate; 305. Spring cover plate; 306. Cylinder fixing seat; 307. Unloading cylinder; 308. Telescopic rod; 309. First spring; 310. Bending top block; 311. Slider seat fixing plate; 312. Bending slider seat; 313. Bending slide 314. Positioning block; 315. Push plate; 316. Push rod mounting seat; 317. Second spring; 318. Push rod; 4. Material taking mold; 401. Material taking bracket; 402. Material taking cylinder; 403. Material taking claw; 404. Spring mounting groove; 405. Pointed hook; 5. Lower pressing mold; 501. Lower mold base; 502. Lower clamping plate; 503. Lower cover plate; 504. Third spring; 505. Fourth spring; 506. Sliding ring; 507. Die push rod; 508. Float push rod; 509. Outer bending float; 510. Inner die; 6. Rotating disk. Detailed Implementation

[0037] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] Example 1

[0040] This embodiment provides a nail-threading type automatic bending device, such as... Figures 1-5 As shown, it includes: a blanking mold 1, an inspection mold 2, an upper pressing mold 3, a picking mold 4, a rotating disk 6, and a lower pressing mold 5; the rotating disk 6 is arranged in a circular array with multiple lower pressing molds 5; the blanking mold 1 is used to place unbent bearing cages onto the lower pressing molds 5; the inspection mold 2 is equipped with a sensor to verify whether a bearing cage is placed on the lower pressing mold 5; the picking mold 4 is used to pick up the bent bearing cages; the blanking mold 1 and the picking mold 4 are each equipped with an independent robotic arm;

[0041] The upper die 3 is fixedly mounted on the working arm 301 of the punch press. The upper die 3 includes an upper die base 302 located at the lower end of the working arm 301. The core of the upper die base 302 is provided with a buffer mechanism. The lower end of the upper die base 302 is provided with an upper clamping plate 303 and a bending plate 304. The bending plate 304 is located at the lower end of the upper clamping plate 303. A spring cover plate 305 is provided above the working arm 301. A material ejection cylinder 307 and a cylinder fixing seat 306 are provided above the spring cover plate 305. Two guide pillars are also provided on the upper die base 302 for positioning when combined with the lower die 5. The lower die 5 consists of a bending die, a lower buffer mechanism, and a lower die base 501 housing. The bending die and the lower buffer mechanism are located in the cavity of the lower die base 501 housing. The bending die achieves bending of the part under the action of the lower buffer mechanism.

[0042] Furthermore, the blanking die 1 includes a transition support 101, a blanking cylinder 102, flat claws 104, pointed claws 105, a rotating block 103, and a guide rod 106; the transition support 101 is disposed on the top of the side of the blanking cylinder 102, the guide rod 106 is disposed on the top of the blanking cylinder 102, multiple flat claws 104 and pointed claws 105 are provided and evenly distributed at intervals in the guide channel 107 at the bottom of the blanking cylinder 102, and the rotating block 103 is rotatably disposed on the outer side wall of the blanking cylinder 102, and the rotating block 103 is driven by the ejection cylinder 307. A driving block is provided on the outer wall of the rotating block 103 to drive the flat claw 104 and the pointed claw 105 to move along the guide channel 107 away from the axis of the discharge cylinder 102. One flat claw 104 and one pointed claw 105 share one driving block. One end of the flat claw 104 is provided with a driven block and a spring mounting groove 404, and the other end is provided with a square protrusion. One end of the pointed claw 105 is provided with a driven block and a spring mounting groove 404, and the other end is provided with a conical protrusion. The same annular spring is installed in the spring mounting grooves 404 of the multiple flat claws 104 and pointed claws 105.

[0043] Furthermore, the material-retrieving mold 4 includes a material-retrieving bracket 401, a material-retrieving cylinder 402, a material-retrieving claw 403, and a material-retrieving spring; the material-retrieving cylinder 402 is provided with a material-retrieving bracket 401 at its top end, and a claw groove is provided at its bottom end for installing the material-retrieving claw 403; one end of the material-retrieving claw 403 is hinged to the material-retrieving cylinder 402, and the other end is provided with a pointed hook 405, which faces the inside of the material-retrieving cylinder 402; the bottom outer end of the material-retrieving cylinder 402 and the material-retrieving claw 403 are both provided with spring mounting grooves 404 for tightening the material-retrieving claw 403 to be flush with the side wall of the material-retrieving cylinder 402.

[0044] Furthermore, the buffer mechanism includes a first spring 309, a bending top block 310 is provided below the first spring 309, and a slider seat fixing plate 311 is provided below the bending top block 310. The upper end of the first spring 309 abuts against the spring cover plate 305. The lower end of the slider seat fixing plate 311 is provided with an upper pressure head, which is located in the vertical slide at the center of the upper clamping plate 303 and the bending plate 304, for performing a first bending of the part. The lower end of the vertical slide of the bending plate 304 is provided with a chamfer for performing a second bending of the part.

[0045] Furthermore, the upper pressure head comprises a bending slider seat 312, multiple bending sliders 313, and a positioning block 314; the upper end of the bending slider seat 312 is fixedly connected to the slider seat fixing plate 311, and the lower end of the bending slider seat 312 is connected to the positioning block 314 through a damping element; the multiple bending sliders 313 are slidably disposed on the side of the bending slider seat 312.

[0046] The bending slider seat 312 is frustum-shaped, and the multiple bending sliders 313 are connected to the bending slider seat 312 through dovetail grooves; the bending sliders 313 are wedge-shaped, and the multiple bending sliders 313 and the bending slider seat 312 together form a cylindrical shape; a boss is provided at the lower end of the outer arc surface of the bending slider 313 along the axial direction.

[0047] Furthermore, a material ejection mechanism is provided in the cavity of the bending top block 310. The material ejection mechanism includes a second spring 317, a thrust plate 315, and a push rod mounting seat 316. The lower end of the second spring 317 abuts against the slider seat fixing plate 311, and the upper end abuts against the push rod mounting seat 316. The upper end of the push rod mounting seat 316 is fixedly connected to the thrust plate 315. The telescopic rod 308 of the material ejection cylinder 307 passes through the cylinder fixing plate, the spring cover plate 305, and the bending top block 310 and abuts against the thrust plate 315. The end of the telescopic rod 308 of the material ejection cylinder 307 is provided with a punch for pushing the thrust plate 315 and dispersing the impact load on the thrust plate 315. A plurality of push rods 318 are provided on the push rod mounting seat 316. The number of push rods 318 is the same as the number of bending sliders 313 and corresponds one-to-one.

[0048] Furthermore, the lower die 5 is composed of a lower die base 501, a lower clamping plate 502, and a lower cover plate 503; the lower die base 501 is disposed below the lower clamping plate 502, and the lower cover plate 503 is disposed above the lower clamping plate 502; the lower die base 501 is fixedly disposed on the worktable of the punch press.

[0049] Furthermore, the lower buffer mechanism includes a third spring 504, a fourth spring 505, a die push rod 507, and a float push rod 508; the third spring 504 and the fourth spring 505 are disposed in the cavity formed between the core of the lower die base 501 and the lower clamping plate 502; the diameter of the fourth spring 505 is smaller than the diameter of the third spring 504, and the fourth spring 505 is disposed at the center of the third spring 504; a sliding ring 506 is disposed at the top end of the third spring 504, and a plurality of die push rods 507 are arranged circumferentially on the sliding ring 506; and a float push rod 508 is disposed at the top end of the fourth spring 505.

[0050] Furthermore, an inner die 510 and an outer bending float 509 are slidably disposed on the lower cover plate 503 in the direction perpendicular to the normal. The die push rod 507 passes through the lower clamping plate 502 and is connected to the bottom end of the inner die 510. The float push rod 508 passes through the lower clamping plate 502 and is connected to the bottom end of the outer bending float 509.

[0051] Example 2

[0052] This embodiment provides a working method for an automatic bending device of the nail-threading type, including the following steps:

[0053] S1. The blanking die 1 moves to directly above the lower pressing die 5. The rotating block 103 rotates clockwise, and the flat claw 104 moves away from the axis of the blanking cylinder 102. The lowest bearing cage in the blanking cylinder 102 on the square protrusion falls onto the lower pressing die 5. At this time, the bearing cage in the blanking cylinder 102 is blocked by the pointed claw 105, and the other bearing cages do not move. Then the rotating block 103 rotates counterclockwise, and the flat claw 104 resets under the action of the spring. The rotating block 103 continues to rotate counterclockwise, and the pointed claw 105 moves away from the axis of the blanking cylinder 102. At this time, the lowest bearing cage in the blanking cylinder 102 on the conical protrusion falls onto the square protrusion and waits to fall. The inspection die 2 uses a sensor to check whether the bearing cage on the lower die base 501 is placed in place. If it is not in place, an alarm is triggered and the machine stops. If it is in place, the next step is performed.

[0054] S2. Driven by the working arm 301 of the punch press, the upper die 3 slowly moves downward, and the positioning block 314 begins to contact the bearing cage on the lower die 5; the upper die 3 continues to move downward, the first spring 309 begins to contract, the positioning block 314 begins to position the bearing cage on the lower die, the inner die 510 moves downward, the fourth spring 505 begins to contract, the outer bending float 509 stops, and under the pressure of the inner wall of the outer bending float 509 and the lower end face of the boss, the bending claw of the bearing cage performs the first 90° bend at this time;

[0055] S3. The upper die 3 continues to move downward, the bending plate 304 begins to contact the outer bending float 509, the outer bending float 509 begins to move downward until the bending plate 304 contacts the bent claw of the bearing cage; the upper die 3 continues to move downward, the bending plate 304 performs a second 30° bend on the bent claw of the bearing cage until the claw is bent to adhere to the upper surface of the boss;

[0056] S4. The upper die 3 is reset. At this time, the telescopic rod 308 of the ejector cylinder 307 is activated, pushing the push plate 315 downward. The second spring 317 begins to contract, and the push rod 318 pushes the bending slider 313 downward. At this time, the diameter of the cylinder formed by the multiple bending sliders 313 decreases, and the damping element is stretched until the bearing cage is disengaged from the upper die 3.

[0057] S5. The ejector cylinder 307 stops operating, the second spring 317 and the damping element reset, the bending slider 313 resets, and then the rotating disk 6 rotates to perform the next bending.

[0058] S6. The material taking mold 4 moves to the bending lower pressing mold 5, the material taking cylinder 402 moves down, the inclined surface of the material taking claw 403 contacts the bearing retainer and then opens, and the material taking claw 403 is tightened by the spring. After the bearing retainer is caught on the sharp hook 405 of the claw, the material taking mold 4 sends the bearing retainer to the next process.

[0059] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A nail-threading type automatic bending device, characterized in that, include: The assembly includes a blanking die, an inspection die, an upper pressing die, a picking die, a rotating disk, and a lower pressing die. Multiple lower pressing dies are arranged in a circular array on the rotating disk. The blanking die is used to place unbent bearing cages onto the lower pressing dies. The inspection die is equipped with a sensor to verify whether a bearing cage is placed on the lower pressing die. The picking die is used to pick up bent bearing cages. The blanking die and the picking die are each equipped with an independent robotic arm. The upper die is fixedly mounted on the working arm of the punch press. The upper die includes an upper die base located at the lower end of the working arm. A buffer mechanism is provided in the core of the upper die base. An upper clamping plate and a bending plate are provided at the lower end of the upper die base, with the bending plate located at the lower end of the upper clamping plate. A spring cover plate is provided above the working arm, and a material ejection cylinder and a cylinder fixing seat are provided above the spring cover plate. Two guide pillars are also provided on the upper die base for positioning when combined with the lower die. The lower die consists of a bending die, a lower buffer mechanism, and a lower die. The bending die and the lower buffer mechanism are located in the cavity of the lower die. The bending die achieves bending of the part under the action of the lower buffer mechanism. The blanking die includes a transition support, a blanking cylinder, flat claws, pointed claws, a rotating block, and a guide rod. The transition support is located on the top of the side of the blanking cylinder, and the guide rod is located on the top of the blanking cylinder. Multiple flat claws and pointed claws are evenly distributed at intervals in the guide channel at the bottom of the blanking cylinder. The rotating block is rotatably mounted on the outer wall of the blanking cylinder, and a driving block is provided on the outer wall of the rotating block to drive the flat claws and pointed claws to move along the guide channel in a direction away from the axis of the blanking cylinder. One end of the flat claw has a driven block and a spring mounting groove, and the other end has a square protrusion. One end of the pointed claw has a driven block and a spring mounting groove, and the other end has a conical protrusion. The same annular spring is installed in the spring mounting grooves of the multiple flat claws and pointed claws. The material handling mold includes a material handling bracket, a material handling cylinder, material handling claws, and a material handling spring; the material handling bracket is provided at the top of the material handling cylinder, and a claw groove is provided at the bottom of the material handling cylinder for installing the material handling claws; one end of the material handling claws is hinged to the material handling cylinder, and the other end is provided with a pointed hook, the pointed hook facing the inside of the material handling cylinder; spring mounting grooves are provided on the bottom outer side of the material handling cylinder and on the material handling claws for tightening the material handling claws to be flush with the side wall of the material handling cylinder.

2. The automatic bending device of the nail-threading type as described in claim 1, characterized in that, The buffer mechanism includes a first spring, a bending top block is provided below the first spring, and a slider seat fixing plate is provided below the bending top block. The upper end of the first spring abuts against the spring cover plate. The lower end of the slider seat fixing plate is provided with an upper pressure head, which is located in the vertical slide at the center of the upper clamping plate and the bending plate, for performing a first bending of the part. The lower end of the vertical slide of the bending plate is provided with a chamfer for performing a second bending of the part.

3. The automatic bending equipment of the nail-threading type as described in claim 2, characterized in that, The upper pressure head consists of a bending slider seat, multiple bending sliders, and a positioning block; the upper end of the bending slider seat is fixedly connected to the slider seat fixing plate, and the lower end of the bending slider seat is connected to the positioning block through a damping element; the multiple bending sliders are slidably disposed on the side of the bending slider seat. The bending slider seat is frustum-shaped, and multiple bending sliders are connected to the bending slider seat through dovetail grooves; the bending slider is wedge-shaped, and multiple bending sliders and the bending slider seat together form a cylindrical shape; a boss is provided at the lower end of the outer arc surface of the bending slider along the axial direction.

4. The automatic bending device of the nail-threading type as described in claim 3, characterized in that, The cavity of the bending top block is equipped with a material ejection mechanism, which includes a second spring, a thrust plate, and a push rod mounting seat. The lower end of the second spring abuts against the slider seat fixing plate, and the upper end abuts against the push rod mounting seat. The upper end of the push rod mounting seat is fixedly connected to the thrust plate. The telescopic rod of the ejection cylinder passes through the cylinder fixing seat, the spring cover plate, and the bending top block, and then abuts against the thrust plate. The end of the telescopic rod of the ejection cylinder is equipped with a punch for pushing the thrust plate and dispersing the impact load on the thrust plate. The push rod mounting seat is equipped with multiple push rods, the number of which is the same as the number of bending sliders, and they correspond one-to-one.

5. The automatic bending device of the nail-threading type as described in claim 4, characterized in that, The lower die consists of a lower die base, a lower clamping plate, and a lower cover plate; the lower die base is located below the lower clamping plate, and the lower cover plate is located above the lower clamping plate; the lower die base is fixedly mounted on the worktable of the punch press.

6. The automatic bending device of the nail-threading type as described in claim 5, characterized in that, The lower buffer mechanism includes a third spring, a fourth spring, a die ejector rod, and a float ejector rod; the third spring and the fourth spring are disposed in a cavity formed between the core of the lower die holder and the lower clamping plate; the diameter of the fourth spring is smaller than that of the third spring, and the fourth spring is located at the center of the third spring; a sliding ring is provided at the top of the third spring, and multiple die ejector rods are arranged in a circumferential array on the sliding ring; a float ejector rod is provided at the top of the fourth spring.

7. The automatic bending device of the nail-threading type as described in claim 6, characterized in that, An inner die and an outer bending float are slidably disposed on the lower cover plate in the direction perpendicular to the normal. The die push rod passes through the lower clamping plate and is connected to the bottom end of the inner die. The float push rod passes through the lower clamping plate and is connected to the bottom end of the outer bending float.

8. The working method of the automatic bending equipment of the nail-threading type as described in claim 7, characterized in that, Includes the following steps: S1. The blanking die moves to directly above the lower die, the rotating block rotates clockwise, the flat claw moves away from the axis of the blanking cylinder, and the lowest bearing retainer in the blanking cylinder on the square protrusion falls onto the lower die; the inspection die checks whether the bearing retainer on the lower die base is in place through a sensor. If it is not in place, an alarm is triggered and the machine stops. If it is in place, the next step is performed. S2. Driven by the working arm of the punch press, the upper die slowly moves downward, and the positioning block begins to contact the bearing cage on the lower die; the upper die continues to move downward, the first spring begins to contract, the positioning block begins to position the bearing cage on the lower die, the inner die moves downward, the fourth spring begins to contract, the outer bending float stops, and under the pressure of the inner wall of the outer bending float and the lower end face of the boss, the bending claw of the bearing cage performs its first 90° bend; S3. The upper die continues to move downward, the bending plate begins to contact the outer bending float, the outer bending float begins to move downward until the bending plate contacts the bent claw of the bearing cage; the upper die continues to move downward, the bending plate performs a second 30° bend on the bent claw of the bearing cage until the bent claw is bent to adhere to the upper surface of the boss; S4. The upper die is reset. At this time, the telescopic rod of the ejector cylinder moves and pushes the push plate downward. The second spring begins to contract. The push rod pushes the bending slider to move downward. At this time, the diameter of the cylinder formed by the multiple bending sliders decreases. The damping element is stretched until the bearing cage disengages from the upper die. S5. The ejector cylinder stops operating, the second spring and damping element reset, the bending slider resets, and then the rotating disk rotates to perform the next bending. S6. The material taking mold moves to the bent lower die, the material taking cylinder moves down, the inclined surface of the material taking claw contacts the bearing retainer and then opens, and the material taking claw is tightened by the spring. After the bearing retainer is caught on the sharp hook of the claw, the material taking mold sends the bearing retainer to the next process.

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