Cold heading forming equipment for inner ferrule and outer ferrule of bearing

Abstract

The invention relates to the technical field of cold heading forming equipment, in particular to bearing inner and outer ferrule cold heading forming equipment which comprises a cold heading machine body, a feeding mechanism is mounted at the feeding end of the cold heading machine body, and the feeding mechanism comprises two guide rods, a movable frame, two first springs, a driving assembly and a clamp assembly; the two guide rods are fixedly installed on the outer side of the cold heading machine body in parallel, the two ends of the movable frame are slidably installed on the two guide rods respectively, the two guide rods are sleeved with the two first springs respectively, and the driving assembly is installed on the cold heading machine body so as to drive the movable frame to move. The forceps holder assembly is installed on the inner side of the movable frame so as to clamp the steel pipe or the wire rod. Static friction is formed between the clamp assembly and the steel pipe or the wire rod, so that the slipping problem is avoided, the steel pipe or the wire rod is conveyed under the clamping of the clamp assembly according to the expected situation, and the problem of product defects caused by insufficient feeding or excessive feeding is effectively avoided.

Description

Technical Field

[0001] This invention relates to the technical field of cold heading equipment for bearing inner and outer rings, and particularly to a cold heading equipment for bearing inner and outer rings. Background Technology

[0002] A cold heading machine is a device that forges bars or wires into shape at room temperature. By using the cold heading method, the cold heading machine can directly form materials into the required shape and size, which not only saves a lot of materials, but also greatly improves production efficiency and significantly increases the mechanical strength of the upset parts. Among them, the inner and outer rings of bearings can be obtained by stamping with multiple dies using a multi-station cold heading machine.

[0003] In cold heading machines, a feeding mechanism is needed to transport bars or wires to the machine for processing. Existing cold heading machines primarily use a ratchet and pawl structure for feeding. Figure 1 and Figure 2 As shown, the rotation of cam 101 causes the first link 102 to swing, which in turn causes the second link 103 to drive the third link 104 to swing synchronously. This causes the pawl 105 to drive the ratchet 106 to rotate in one direction. The ratchet 106 is coaxially connected to the drive gear 107, so the drive gear 107 drives the transmission gear 108 to rotate, which in turn causes the feeding roller 109 to convey the wire material 20. The tension spring 100 can return the first link 102 to its initial position when it reaches its maximum stroke, thus achieving intermittent feeding of the wire material 20.

[0004] During the process of feeding the wire 20 by the feeding roller 109, the wire 20 is mainly moved by the friction between the feeding roller 109 and the wire 20. However, since there will be relative displacement between the wire 20 and the feeding roller 109, the friction between the wire 20 and the feeding roller 109 is sliding friction. After being subjected to sliding friction for a long time, the outer surface of the feeding roller 109 will become smooth, which will reduce the friction between the feeding roller 109 and the wire 20 and may cause local slippage. Once slippage occurs, the wire 20 will not move. This means that the wire 20 cannot be fed as expected during the feeding process, resulting in insufficient feed length or excessive feed length producing small pieces, which in turn affects subsequent processing. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of product defects caused by insufficient or excessive feed length in the prior art, and to propose a cold heading forming equipment for bearing inner and outer rings.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a cold heading forming equipment for bearing inner and outer rings, including a cold heading machine body. The feeding end of the cold heading machine body is equipped with a feeding mechanism, which includes two guide rods, a movable frame, two first springs, a drive assembly, and a clamping assembly. The two guide rods are fixedly installed in parallel on the outside of the cold heading machine body. The two ends of the movable frame are slidably mounted on the two guide rods respectively. The two first springs are respectively sleeved on the two guide rods. The drive assembly is installed on the cold heading machine body to drive the movable frame to move. The clamping assembly is installed on the inside of the movable frame to clamp steel pipes or wires.

[0008] Preferably, the drive assembly includes a motor, a cam, a movable rod, and a first pressure roller; the motor is fixedly installed on the outside of the cold heading machine body and its output shaft is connected to the cam; the movable rod passes through the side wall of one side of the movable frame and is slidably connected to the movable frame; the first pressure roller is rotatably installed at one end of the movable rod and intermittently contacts the cam; the other end of the movable rod can abut against the side wall of the other side of the movable frame.

[0009] Preferably, the clamping assembly includes two rotating rods and two clamping heads; one end of each of the two rotating rods is rotatably connected to the inner wall of the movable frame via a pin, and the two clamping heads are respectively fixedly installed at the other end of the two rotating rods.

[0010] Preferably, the clamping assembly further includes a fixed plate, a sliding rod, a second wedge block, a U-shaped toothed plate, a second spring, and two gears; the fixed plate is fixedly installed on the inner side of the movable frame, the sliding rod passes through the fixed plate and is slidably connected to the fixed plate, the second wedge block is fixedly installed at one end of the sliding rod, the U-shaped toothed plate is fixedly installed at the other end of the sliding rod, the second spring is sleeved on the sliding rod and located between the fixed plate and the second wedge block, and the two gears are respectively coaxially fixedly connected to the two rotating rods and both mesh with the U-shaped toothed plate.

[0011] Preferably, a first wedge block is fixedly installed on the movable rod, and the first wedge block can cooperate with a second wedge block.

[0012] Preferably, each of the two clamp heads has a corresponding slot on its inner side, and the inner wall of each slot is provided with anti-slip texture.

[0013] Preferably, the cam component includes a rotating wheel, a guide sleeve, a pressure rod, a second pressure wheel, and a cylinder; the rotating wheel is fixedly mounted on the output shaft of the motor, the guide sleeve is fixedly mounted on the outer side of the rotating wheel, the pressure rod passes through the guide sleeve and is slidably connected to the guide sleeve, the cylinder is fixedly mounted on the inner side of the rotating wheel and its output end is fixedly connected to one end of the pressure rod, and the second pressure wheel is rotatably mounted on the other end of the pressure rod and intermittently contacts the first pressure wheel.

[0014] Preferably, the rotating wheel has a hollow internal structure, and the side of the pressure rod that contacts the first pressure wheel has an inclined surface structure.

[0015] The present invention proposes a cold heading forming equipment for inner and outer bearing rings, which has the following advantages: the clamping assembly can periodically convey steel pipes or wires, and the clamping assembly and the steel pipes or wires are subject to static friction, so there will be no slippage problem. This allows the steel pipes or wires to be conveyed as expected under the clamping of the clamping assembly, effectively avoiding the problem of insufficient or excessive feeding and product defects. Attached Figure Description

[0016] Figure 1 A schematic diagram of the feeding mechanism of a cold heading machine in the prior art. Figure 1 ;

[0017] Figure 2 A schematic diagram of the feeding mechanism of a cold heading machine in the prior art. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of a cold heading forming equipment for inner and outer bearing rings proposed in this invention;

[0019] Figure 4 This is a schematic diagram of the feeding mechanism of a cold heading forming equipment for inner and outer bearing rings proposed in this invention;

[0020] Figure 5 This is a schematic diagram of the drive assembly of a cold heading forming equipment for inner and outer bearing rings proposed in this invention;

[0021] Figure 6 This is a schematic diagram of the internal structure of the movable frame of a cold heading forming equipment for inner and outer bearing rings proposed in this invention;

[0022] Figure 7 This is a schematic diagram of the clamping assembly of a cold heading forming equipment for inner and outer bearing rings proposed in this invention;

[0023] Figure 8 This is a schematic diagram of the structure of a cold heading forming equipment for bearing inner and outer rings proposed in this invention.

[0024] In the figure: Cam 101, First Link 102, Second Link 103, Third Link 104, Pad 105, Ratchet 106, Drive Gear 107, Transmission Gear 108, Feed Roller 109, Tension Spring 100, Wire Material 20;

[0025] 1. Cold heading machine body; 2. Feeding mechanism; 21. Guide rod; 22. Movable frame; 23. First spring; 24. Drive assembly; 241. Motor; 242. Cam; 242. Rotating wheel; 2421. Guide sleeve; 2422. Pressure rod; 2423. Second pressure wheel; 2424. Cylinder; 2425. Movable rod; 243. First pressure wheel; 244. First wedge block; 245. Clamping assembly; 25. Fixed plate; 251. Slide rod; 252. Second wedge block; 253. U-shaped toothed plate; 254. Second spring; 255. Gear; 256. Rotating rod; 257. Clamping head; 258. Slot; 259. Steel pipe or wire; 3. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] Example 1:

[0028] Reference Figure 3-5 A cold heading forming device for bearing inner and outer rings includes a cold heading machine body 1. A feeding mechanism 2 is installed at the feeding end of the cold heading machine body 1. The feeding mechanism 2 includes two guide rods 21, a movable frame 22, two first springs 23, a drive assembly 24, and a clamping assembly 25. The two guide rods 21 are fixedly installed in parallel on the outer side of the cold heading machine body 1. The two ends of the movable frame 22 are slidably installed on the two guide rods 21 respectively. The two first springs 23 are respectively sleeved on the two guide rods 21. The drive assembly 24 is installed on the cold heading machine body 1 to drive the movable frame 22 to move. The clamping assembly 25 is installed inside the movable frame 22 to clamp the steel pipe or wire 3. The steel pipe or wire 3 is clamped by the clamping assembly 25, and then the movable frame 22 is driven by the drive assembly 24 to move along the guide rod 21, so that the movable frame 22 drives the steel pipe or wire 3 to move synchronously, thereby enabling the movable frame 22 to transport the steel pipe or wire 3. During this process, there is static friction between the steel pipe or wire 3 and the clamping assembly 25, so the steel pipe or wire 3 will not slip with the clamping assembly 25 when it is clamped.

[0029] The drive assembly 24 includes a motor 241, a cam 242, a movable rod 243, and a first pressure roller 244. The motor 241 is fixedly installed on the outside of the cold heading machine body 1, and its output shaft is connected to the cam 242. The movable rod 243 passes through the side wall of one side of the movable frame 22 and is slidably connected to the movable frame 22. The first pressure roller 244 is rotatably installed at one end of the movable rod 243 and intermittently contacts the cam 242. The other end of the movable rod 243 can abut against the side wall of the other side of the movable frame 22. By starting the motor 241, the cam 242 can be rotated. When the cam 242 contacts the first pressure roller 244, the output end of the cam 242 will squeeze the first pressure roller 244. Since the first pressure roller 244 has the ability to rotate, there is rolling friction between the cam 242 and the first pressure roller 244. This can avoid the problem that the cam 242 is restricted by the first pressure roller 244 and cannot continue to rotate.

[0030] After being squeezed by the cam 242, the first pressure roller 244 moves axially, causing the movable rod 243 to slide inward toward the inside of the movable frame 22. When the end of the movable rod 243 abuts against the side wall of the movable frame 22, the movable rod 243 transmits the squeezing force of the cam 242 on the first pressure roller 244 to the movable frame 22, which in turn pushes the movable frame 22 to translate along the guide rod 21. At this time, the movable frame 22 acts on the two first springs 23, so that the two first springs 23 are squeezed by the movable frame 22 and accumulate elastic potential energy. At the same time, when the movable frame 22 translates under the action of the movable rod 243, it can drive the steel pipe or wire 3 to move toward the feeding end of the cold heading machine body 1, which realizes the conveying of the steel pipe or wire 3. Throughout the process, the axial force applied by the cam 242 on the cam 242 can be stably transmitted to the movable frame 22, which can ensure that the movable frame 22 can move stably.

[0031] When the cam 242 disengages from the first pressure roller 244, the two first springs 23 release their potential energy, causing the clamping assembly 25 to disengage from the steel pipe or wire 3. This allows the movable frame 22 to move the clamping assembly 25 back to its initial position. When the cam 242 re-engages the first pressure roller 244, the movable frame 22 resumes conveying the steel pipe or wire 3. This cycle repeats, allowing the movable frame 22 to periodically convey the steel pipe or wire 3. Since the clamping assembly 25 and the steel pipe or wire 3 experience static friction and do not slip, the steel pipe or wire 3 is conveyed according to the expected conditions under the clamping of the clamping assembly 25, effectively avoiding product defects caused by insufficient or excessive feeding.

[0032] Example 2:

[0033] In Embodiment 1, after the cam 242 contacts the first pressure roller 244, the movable frame 22 can move. This process requires the clamping assembly 25 to clamp the steel pipe or wire 3. After the cam 242 contacts the first pressure roller 244, the movable frame 22 will return to its initial position. This process requires the clamping assembly 25 to disengage from the steel pipe or wire 3. Conventional methods use another drive source to control the clamping and disengaging of the steel pipe or wire 3 by the clamping assembly 25. This requires the opening and closing of the drive source to be synchronized with the contact state of the cam 242 and the first pressure roller 244. This requires the cooperation of multiple electronic components, which greatly increases the manufacturing and usage costs.

[0034] Reference Figure 3-7 As another preferred embodiment of the present invention, the difference from Embodiment 1 is that the clamping assembly 25 includes a fixed plate 251, a sliding rod 252, a second wedge block 253, a U-shaped toothed plate 254, a second spring 255, two gears 256, two rotating rods 257, and two clamping heads 258; one end of each of the two rotating rods 257 is rotatably connected to the inner wall of the movable frame 22 via a pin, and the two clamping heads 258 are respectively fixedly installed on the other end of the two rotating rods 257; each of the two clamping heads 258 has a corresponding slot 259 on its inner side, and the inner wall of the slot 259 is provided with anti-slip texture. When the two rotating rods 257 rotate in opposite directions, the included angle between the two rotating rods 257 decreases, which causes the two clamping heads 258 to move closer to each other and clamp the steel pipe or wire 3. The slot 259 can cooperate with the steel pipe or wire 3, thereby limiting the lateral displacement of the steel pipe or wire 3. At the same time, the anti-slip texture on the inner wall of the slot 259 makes the contact surface between the steel pipe or wire 3 and the inner wall of the slot 259 rougher, thereby increasing the friction between the steel pipe or wire 3 and the inner wall of the slot 259. This prevents the steel pipe or wire 3 from slipping with the clamping heads 258 during the conveying process.

[0035] A fixed plate 251 is fixedly installed on the inner side of the movable frame 22. A sliding rod 252 passes through the fixed plate 251 and is slidably connected to the fixed plate 251. A second wedge block 253 is fixedly installed at one end of the sliding rod 252. A U-shaped toothed plate 254 is fixedly installed at the other end of the sliding rod 252. A second spring 255 is sleeved on the sliding rod 252 and located between the fixed plate 251 and the second wedge block 253. The elastic coefficient of the second spring 255 is less than that of the first spring 23. Two gears 256 are coaxially fixedly connected to two rotating rods 257 respectively, and both mesh with the U-shaped toothed plate 254. A first wedge block 245 is fixedly installed on the movable rod 243. The first wedge block 245 can cooperate with the second wedge block 253.

[0036] Working principle: After the cam component 242 contacts the first pressure roller 244, the first pressure roller 244 will act on the movable rod 243 to slide into the movable frame 22. This causes the first wedge block 245 to contact the second wedge block 253, which in turn causes the first wedge block 245 to squeeze the second wedge block 253. The first wedge block 245 can convert the axial force of the movable rod 243 into a radial force on the second wedge block 253, thereby causing the second wedge block 253 to drive the slide rod 252 to slide radially. At this time, the second wedge block 253 will act on the second spring 255. After being squeezed by the second wedge block 253, the second spring 255 will accumulate elastic potential energy.

[0037] Simultaneously, the slide bar 252 drives the U-shaped toothed plate 254 to move closer to the two gears 256, causing the two gears 256 to rotate in opposite directions. This causes the two clamping heads 258 to move closer together to clamp the steel pipe or wire 3. The contact process between the first wedge block 245 and the second wedge block 253 can transmit and convert the force applied by the cam component 242 to the first pressure roller 244, while providing clamping force for the two clamping heads 258. This not only allows the clamping process of the clamping heads 258 and the conveying process of the movable frame 22 to share a power source, reducing the manufacturing cost of the equipment, but also ensures that the clamping process of the clamping heads 258 and the conveying process of the movable frame 22 are synchronized, avoiding the problem of insufficient feeding caused by asynchronous clamping when the steel pipe or wire 3 is conveyed.

[0038] When the cam 242 disengages from the first pressure roller 244, the second wedge block 253 loses the force of the movable rod 243. At this time, the second spring 255 releases potential energy, causing the second wedge block 253 to act in the opposite direction on the first wedge block 245. This causes the first wedge block 245 to drive the movable rod 243 back to its initial position. At the same time, the second wedge block 253 drives the slide rod 252 to slide in the opposite direction, which causes the U-shaped toothed plate 254 to move away from the two gears 256. This causes the two rotating rods 257 to rotate in opposite directions, which causes the two clamp heads 258 to move away from each other and disengage from the steel pipe or wire 3. This ensures that the clamp heads 258 will not contact the steel pipe or wire 3 when the movable frame 22 slides in the opposite direction, thus preventing the problem of reverse conveying.

[0039] Example 3:

[0040] In Embodiment 1 or Embodiment 2, the protruding length of the cam component 242 also determines the conveying distance of the clamping assembly 25 to the steel pipe or wire 3. In actual processing, different sizes of parts require different single conveying lengths of the steel pipe or wire 3. However, the protruding length of the cam component 242 in the prior art is fixed. When the single conveying length requirements of the steel pipe or wire 3 are different, the cam component 242 needs to be disassembled and replaced, which is cumbersome and reduces processing efficiency.

[0041] Reference Figure 3-8 As another preferred embodiment of the present invention, the difference from Embodiment 1 or Embodiment 2 is that the cam component 242 includes a rotating wheel 2421, a guide sleeve 2422, a pressure rod 2423, a second pressure wheel 2424, and a cylinder 2425; the rotating wheel 2421 is fixedly mounted on the output shaft of the motor 241, and the rotating wheel 2421 has a hollow internal structure; the guide sleeve 2422 is fixedly mounted on the outside of the rotating wheel 2421, the pressure rod 2423 passes through the guide sleeve 2422 and is slidably connected to the guide sleeve 2422, and the side of the pressure rod 2423 that contacts the first pressure wheel 244 has an inclined structure; the cylinder 2425 is fixedly mounted on the rotating wheel 2421. The inner side of 421 and the output end are fixedly connected to one end of the pressure rod 2423. The second pressure roller 2424 is rotatably installed on the other end of the pressure rod 2423 and intermittently contacts the first pressure roller 244. The side of the pressure rod 2423 that contacts the first pressure roller 244 is a sloping structure, which allows the first pressure roller 244 to roll along the sloping surface of the pressure rod 2423. This converts the circumferential force of the pressure rod 2423 into an axial force on the first pressure roller 244, thereby enabling the movable rod 243 to move. This allows the clamping process of the clamping head 258 on the steel pipe or wire 3 and the conveying process of the movable frame 22 to be realized.

[0042] When it is necessary to adjust the single conveying length of the steel pipe or wire 3, the pressure rod 2423 is slid outward or inward by controlling the cylinder 2425, thereby changing the extension length of the pressure rod 2423. The extension length of the pressure rod 2423 can determine the moving distance of the first pressure roller 244, which can adjust the single conveying length of the steel pipe or wire 3. This can meet the processing of parts of different sizes, has a wide range of applications, is simple to operate, and greatly improves processing efficiency.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cold heading forming equipment for inner and outer rings of bearings, comprising a cold heading machine body (1), characterized in that, The feeding end of the cold heading machine body (1) is equipped with a feeding mechanism (2). The feeding mechanism (2) includes two guide rods (21), a movable frame (22), two first springs (23), a drive assembly (24), and a clamping assembly (25). The two guide rods (21) are fixedly installed in parallel on the outside of the cold heading machine body (1). The two ends of the movable frame (22) are slidably installed on the two guide rods (21). The two first springs (23) are respectively sleeved on the two guide rods (21). The drive assembly (24) is installed on the cold heading machine body (1) to drive the movable frame (22) to move. The clamping assembly (25) is installed on the inside of the movable frame (22) to clamp the steel pipe or wire (3).

2. The cold heading forming equipment for bearing inner and outer rings according to claim 1, characterized in that, The drive assembly (24) includes a motor (241), a cam (242), a movable rod (243), and a first pressure roller (244). The motor (241) is fixedly installed on the outside of the cold heading machine body (1), and its output shaft is connected to the cam (242). The movable rod (243) passes through the side wall of one side of the movable frame (22) and is slidably connected to the movable frame (22). The first pressure roller (244) is rotatably installed on one end of the movable rod (243) and is in intermittent contact with the cam (242). The other end of the movable rod (243) can abut against the side wall of the other side of the movable frame (22).

3. The cold heading forming equipment for bearing inner and outer rings according to claim 2, characterized in that, The clamping assembly (25) includes two rotating rods (257) and two clamping heads (258); one end of each of the two rotating rods (257) is rotatably connected to the inner wall of the movable frame (22) via a pin, and the two clamping heads (258) are respectively fixedly installed at the other end of the two rotating rods (257).

4. The cold heading forming equipment for bearing inner and outer rings according to claim 3, characterized in that, The clamping assembly (25) further includes a fixed plate (251), a sliding rod (252), a second wedge block (253), a U-shaped toothed plate (254), a second spring (255), and two gears (256). The fixed plate (251) is fixedly installed on the inner side of the movable frame (22). The sliding rod (252) passes through the fixed plate (251) and is slidably connected to the fixed plate (251). The second wedge block (253) is fixedly installed at one end of the sliding rod (252). The U-shaped toothed plate (254) is fixedly installed at the other end of the sliding rod (252). The second spring (255) is sleeved on the sliding rod (252) and located between the fixed plate (251) and the second wedge block (253). The two gears (256) are coaxially fixedly connected to the two rotating rods (257) and mesh with the U-shaped toothed plate (254).

5. The cold heading forming equipment for bearing inner and outer rings according to claim 4, characterized in that, A first wedge block (245) is fixedly installed on the movable rod (243), and the first wedge block (245) can cooperate with the second wedge block (253).

6. The cold heading forming equipment for bearing inner and outer rings according to claim 5, characterized in that, Both clamp heads (258) have corresponding slots (259) on their inner sides, and the inner walls of the slots (259) are provided with anti-slip textures.

7. The cold heading forming equipment for bearing inner and outer rings according to claim 6, characterized in that, The cam component (242) includes a rotating wheel (2421), a guide sleeve (2422), a pressure rod (2423), a second pressure wheel (2424), and a cylinder (2425). The rotating wheel (2421) is fixedly mounted on the output shaft of the motor (241). The guide sleeve (2422) is fixedly mounted on the outside of the rotating wheel (2421). The pressure rod (2423) passes through the guide sleeve (2422) and is slidably connected to the guide sleeve (2422). The cylinder (2425) is fixedly mounted on the inside of the rotating wheel (2421), and its output end is fixedly connected to one end of the pressure rod (2423). The second pressure wheel (2424) is rotatably mounted on the other end of the pressure rod (2423) and is in intermittent contact with the first pressure wheel (244).

8. The cold heading forming equipment for bearing inner and outer rings according to claim 7, characterized in that, The rotating wheel (2421) has a hollow internal structure, and the side of the pressure rod (2423) that contacts the first pressure wheel (244) has an inclined structure.

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