Retainer punching pre-positioning device

Abstract

The utility model discloses a retainer punching pre-positioning device, a positioning hole is formed in a retainer, and the pre-positioning device comprises a punching machine, a punching tool, a feeding tool and a pre-positioning mechanism. The punching machine comprises a punching female die and a punch and is used for punching the retainer. A positioning disc and a ratchet motor for driving the positioning disc to rotate are mounted on the punching tool, a positioning rod matched with the positioning hole is arranged on the positioning disc, and the positioning disc is in extrusion fit with the retainer so as to drive the retainer to rotate. A material receiving male die and a motor are installed on the feeding tool, the material receiving male die is matched with the retainer in a magnetic attraction mode, and feeding installation of the retainer is achieved. The pre-positioning mechanism comprises a fixing frame, a telescopic rod installed on the fixing frame and a metal sensor, the metal sensor can detect the position of the positioning hole, the metal sensor is in signal connection with the motor, the retainer can be conveniently rotated to the pre-positioning position, the time for installing the retainer to the positioning disc is saved, and the punching efficiency of the retainer is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing retainer processing, and in particular relates to a retainer punching pre-positioning device. Background Art

[0002] Tapered roller bearings are split bearings. The inner and outer rings of the bearings have tapered raceways. The retainer is a bearing part that wraps all or part of the rolling elements and moves with them. During processing, the retainer needs to be punched to facilitate the placement of the rolling elements. The existing patent (publication number: CN219112651U) discloses an automatic punching die for the retainer of a tapered bearing. It also discloses the partial punching process of the retainer.

[0003] In fact, when the retainer is punching, the retainer is first sleeved onto the receiving punch of the feeding tooling, the feeding tooling moves the retainer to the punching tooling, and installs the retainer on the positioning plate, and then the punch press performs the punching operation on the retainer installed on the positioning plate. A positioning hole is opened on the retainer, and a positioning rod is provided on the positioning plate. When the retainer on the receiving punch is installed on the positioning plate, the receiving punch drives the retainer to rotate so that the positioning rod on the positioning plate is inserted into the positioning hole of the retainer to ensure the accuracy of the punching.

[0004] The existing retainer punching process has the following problems:

[0005] 1. When the receiving punch drives the retainer to rotate and install the retainer on the positioning plate, the rotation positioning of the retainer takes a long time, which makes the efficiency of punching the retainer low;

[0006] 2. When the retainer is close to the positioning plate and rotates, the bottom plate of the retainer and the positioning rod produce friction, causing wear on the positioning rod and the retainer. Utility Model Content

[0007] In view of the above-mentioned deficiencies, the utility model provides a retainer punching pre-positioning device, which realizes the pre-positioning of the retainer by using a metal sensor to sense the positioning hole of the retainer located on the receiving punch, and then the receiving punch directly installs the retainer to the positioning plate, without the need for rotational positioning when installing the retainer, thereby reducing the time for the receiving punch to install the retainer on the positioning plate and improving the punching efficiency of the retainer; and because the retainer on the receiving punch is pre-positioned in advance, when the receiving punch installs the retainer to the positioning plate, the positioning hole of the retainer and the positioning rod of the positioning plate can be on the same axis, and when the receiving punch drives the retainer to move toward the positioning plate, the positioning hole of the retainer and the positioning rod of the positioning plate are plugged and fixed, and the rotational positioning step between the retainer relative to the positioning rod is eliminated, thereby eliminating the wear on the retainer and the positioning rod.

[0008] The utility model is realized by the following technical solutions:

[0009] A retainer punching pre-positioning device is provided, wherein a positioning hole is provided on the retainer, and the pre-positioning device comprises a punching machine, a punching tool, a feeding tool, and a pre-positioning mechanism. The punching machine comprises a punching die and a punch to realize punching of the retainer. A positioning plate and a ratchet motor for driving the positioning plate to rotate are installed on the punching tool, and a positioning rod for cooperating with the positioning hole is provided on the positioning plate. The positioning plate is extruded and matched with the retainer to facilitate driving the retainer to rotate. A material receiving punch and a motor for driving the material receiving punch to rotate are installed on the feeding tool, and the material receiving punch is magnetically matched with the retainer to realize loading and installation of the retainer. The pre-positioning mechanism comprises a fixed frame, a telescopic rod installed on the fixed frame, and a metal sensor fixed to the end of the telescopic rod. The metal sensor can detect the position of the positioning hole. The metal sensor is connected to the motor signal to facilitate rotating the retainer to the pre-positioning position, saving the time used for installing the retainer to the positioning plate, and improving the punching efficiency of the retainer.

[0010] Furthermore, the pre-positioning mechanism also includes a fixed block, which is fixed to the bottom of the telescopic rod. The fixed block is provided with a strip-shaped sliding hole for accommodating the metal sensor. The metal sensor can slide along the extension direction of the strip-shaped sliding hole to facilitate adjustment of the position of the metal sensor and increase the applicability of the metal sensor to different types of retainers.

[0011] Furthermore, a plurality of threaded holes connected to the strip sliding hole are formed at the bottom of the fixing block, and the threaded holes are evenly distributed along the extension direction of the strip sliding hole. The fastening bolts pass through the threaded holes and abut against the metal sensor to fix the fastening bolts in the strip sliding hole.

[0012] Furthermore, the pre-positioning mechanism also includes a fixing plate, an arc-shaped hole is opened on the fixing frame, and a limit hole is opened on the fixing plate. The adjusting bolt passes through the arc-shaped hole and is screwed to the limit hole to adjust the deflection angle of the fixing frame, thereby indirectly adjusting the deflection angle of the metal sensor, which facilitates the metal sensor to accurately measure the position of the positioning hole of the retainer.

[0013] Furthermore, a transverse slide rail is provided at the bottom of the punching tool. The punching tool has an initial position and an impact position. The punching tool can move from the initial position to the impact position along the transverse slide rail. When the punching tool moves to the impact position, the retainer installed on the positioning plate is located between the punch and the punching die, thereby realizing the position movement of the retainer, which is convenient for the punching machine to perform punching operations on the retainer.

[0014] Furthermore, a longitudinal slide rail is provided at the bottom of the loading tooling, and the loading tooling has a loading position and a unloading position. The loading tooling can move from the loading position to the unloading position along the longitudinal slide rail. When the loading tooling is in the loading position, the loading equipment installs the retainer material to the receiving punch; when the loading tooling is in the unloading position, the receiving punch can transfer the retainer material to the positioning plate.

[0015] Furthermore, a transverse slide is provided on the loading tooling, and the material receiving punch is slidably connected to the transverse slide. The material receiving punch slides along the transverse slide to transfer the retainer to the positioning plate, thereby realizing the docking installation of the retainer and the positioning plate, which is convenient for installation.

[0016] Furthermore, the positioning plate is installed at an angle to the loading tooling, and the loading tooling also includes a conical adjuster, which can adjust the inclination angle of the loading tooling. The axis of the positioning plate is parallel to the axis of the receiving punch, which facilitates the movement of the retainer on the receiving punch to the positioning plate.

[0017] Furthermore, the punch press also includes a driving device, which is fixedly connected to the punch and can drive the punch to move back and forth in the vertical direction. A punching groove is provided on the punching die to achieve rapid punching operation of the retainer.

[0018] Furthermore, the surface of the material receiving punch is coated with a Teflon coating, which has a low friction coefficient and excellent wear resistance, thereby reducing the installation resistance when the retainer is installed on the material receiving punch and increasing the service life of the material receiving punch.

[0019] Beneficial effects of the utility model:

[0020] 1. The metal sensor is used to sense the positioning hole of the retainer on the receiving punch to achieve pre-positioning of the retainer. Then the receiving punch directly installs the retainer to the positioning plate. There is no need to rotate and position the retainer when installing it, which reduces the time for the receiving punch to install the retainer on the positioning plate and improves the punching efficiency of the retainer.

[0021] 2. Since the retainer on the material connection punch is pre-positioned in advance, when the material connection punch installs the retainer to the positioning plate, the positioning hole of the retainer and the positioning rod of the positioning plate can be on the same axis. When the material connection punch drives the retainer to move toward the positioning plate, the positioning hole of the retainer and the positioning rod of the positioning plate are plugged and fixed, and the rotational positioning step between the retainer and the positioning rod is eliminated, thereby eliminating the wear on the retainer and the positioning rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A connection diagram for illustrating a schematic implementation of a retainer punching pre-positioning device in the utility model;

[0023] Figure 2 A schematic structural diagram for illustrating a schematic implementation of a retainer punching pre-positioning device in the utility model;

[0024] Figure 3 To illustrate Figure 2 A partial enlarged schematic diagram in the middle;

[0025] Figure 4 A structural schematic diagram for illustrating another exemplary embodiment of a retainer punching pre-positioning device in the utility model;

[0026] Figure 5 To illustrate Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0027] Figure 6 A side view for illustrating a schematic implementation of a retainer punching pre-positioning device in the utility model;

[0028] Figure 7 A top view for illustrating a schematic implementation of a retainer punching pre-positioning device in the utility model.

[0029] List of parts and reference numerals:

[0030] 1. Retainer; 11. Positioning hole; 2. Punch; 21. Punching die; 211. Punching slot; 22. Punch; 23. Driving device; 3. Punching tool; 31. Positioning plate; 32. Ratchet motor; 33. Positioning rod; 34. Horizontal slide rail; 4. Loading tool; 41. Receiving concave film; 42. Motor; 43. Longitudinal slide rail; 44. Horizontal slide plate; 45. Conical adjuster; 5. Pre-positioning mechanism; 51. Fixing frame; 511. Arc hole; 52. Telescopic rod; 53. Metal sensor; 54. Fixing block; 541. Strip slide hole; 542. Threaded hole; 543. Fastening bolt; 55. Fixing plate; 551. Limit hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0033] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention are not only changes in position, but also include movements such as rotation and rolling where there is no relative change in position but a change in state.

[0034] Finally, it should be noted that when a component is referred to as being "located" or "set on" another component, it can be on the other component or there can be an intermediate component at the same time. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be an intermediate component at the same time.

[0035] like Figures 1 to 7 A retainer punching pre-positioning device is shown, and a retainer 1 is provided with a positioning hole 11. The pre-positioning device includes a punching machine 2, a punching tool 3, a feeding tool 4, and a pre-positioning mechanism 5. The punching machine 2 includes a punching die 21 and a punch 22 to realize punching of the retainer 1. The punching tool 3 is equipped with a positioning plate 31 and a ratchet motor 32 for driving the positioning plate 31 to rotate. The positioning plate 31 is provided with a positioning rod 33 that cooperates with the positioning hole 11. The positioning plate 31 is pressed and matched with the retainer 1 to facilitate the rotation of the retainer 1. The feeding tool 4 is equipped with a material receiving punch and a motor 42 that drives the material receiving punch to rotate. The material receiving punch is magnetically matched with the retainer 1 to realize the loading and installation of the retainer 1. The pre-positioning mechanism 5 includes a fixing frame 51, a telescopic rod 52 installed on the fixing frame 51, and a metal sensor 53 fixed to the end of the telescopic rod 52. The metal sensor 53 can detect the position of the positioning hole 11. The metal sensor 53 is connected to the motor 42 signal to facilitate rotating the retainer 1 to the pre-positioning position, saving the time used to install the retainer 1 to the positioning plate 31 and improving the punching efficiency of the retainer 1.

[0036] It should be noted in advance that the retainer 1 of the present application is an unformed retainer 1, and is named retainer 1. The positioning hole 11 of the retainer 1 is located at the bottom of the bowl of the retainer 1, and the center of the positioning hole 11 does not coincide with the center of the retainer 1. If the distance between the center of the positioning hole 11 and the center of the bottom wall of the retainer 1 is set to L, the positioning hole 11 is located on a circle with the center of the bottom wall of the retainer 1 as the center and L as the radius, and this circle is set as the trajectory circle of the positioning hole 11.

[0037] In one embodiment, first, the feeding equipment installs the retainer 1 on the receiving punch of the feeding tool 4, and the retainer 1 is magnetically matched with the receiving punch. At this time, the positioning hole 11 of the retainer 1 appears randomly on the trajectory circle of the positioning hole 11. Then, the telescopic rod 52 of the pre-positioning mechanism 5 extends, driving the metal sensor 53 to move down to the detection position, at which time the axis of the metal sensor 53 intersects with the trajectory circle of the positioning hole 11. The motor 42 drives the receiving punch to rotate, and then drives the retainer 1 to rotate. When the metal sensor 53 detects the positioning hole 11 of the retainer 1, the metal sensor 53 sends a stop signal to the motor 42. At this time, the axis of the metal sensor 53 passes through the center of the positioning hole 11. The pre-positioning of the positioning hole 11 is achieved. The feeding tool 4 drives the retainer 1 to move to the punching tool 3, and the receiving punch moves along the transverse slide 44 of the feeding tool 4 toward the positioning plate 31 to move the retainer 1 on the receiving punch to the positioning plate 31. When the retainer 1 is squeezed through the positioning plate 31, the positioning plate 31 clamps and fixes the retainer 1 in the opposite direction to achieve the installation of the retainer 1 to the positioning plate 31. When the retainer 1 moves toward the positioning plate 31 along the transverse slide 44, the positioning hole 11 of the retainer 1 is aligned with the positioning rod 33 of the positioning plate 31, so that the positioning rod 33 can directly pass through the positioning hole 11 to achieve the positioning installation of the retainer 1. Then the feeding tool 4 retreats to the feeding position, and the punching tool 3 moves the retainer 1 between the punch 22 and the punching die 21. The ratchet motor 32 drives the positioning plate 31 and the retainer 1 to rotate. Synchronously, the driving device 23 drives the punch 22 to reciprocate in the vertical direction to achieve the punching operation of the retainer 1.

[0038] It should be noted that the driving mechanisms for driving the punching tool 3 to move horizontally, driving the feeding tool 4 to move longitudinally, and driving the receiving punch to move along the horizontal slide 44 are all existing driving mechanisms and will not be described in detail here.

[0039] In actual production operations, when the existing equipment is used, after the receiving punch contacts the retainer 1 to the positioning plate 31 and the positioning rod 33, the receiving punch drives the retainer 1 to rotate. When the positioning hole 11 on the retainer 1 is aligned with the positioning rod 33, the positioning rod 33 extends into the positioning hole 11 to achieve the rotational positioning of the retainer 1. The time required for the entire rotational positioning is estimated to be 2 seconds, and then the punching tool 3 drives the retainer 1 to perform the punching operation. The time required for the punching operation is estimated to be 7 seconds. When the present application is adopted, a pre-positioning mechanism 5 is set. After the retainer 1 is installed on the receiving punch of the feeding tool 4, the pre-positioning mechanism 5 directly pre-positions the retainer 1 on the receiving punch, so that the retainer 1 on the receiving punch can be directly connected to the positioning plate 31, saving the 2 seconds required for rotational positioning, thereby improving the efficiency of the punching operation of the retainer 1. It should be noted that when the pre-positioning mechanism 5 is used to pre-position the retainer 1, the punching machine 2 simultaneously punches the previous retainer 1. The pre-positioning of the retainer 1 and the punching of the previous retainer 1 are performed simultaneously, saving the time required for batch processing of the retainers 1.

[0040] It should also be noted that the positioning docking between the retainer 1 and the positioning plate 31, the specific structure of the positioning plate 31, the extrusion and fixing principle of the positioning plate 31 and the retainer 1, etc., are all disclosed by the patents mentioned in the background technology, etc., which belong to the prior art and are not the focus of protection of this application, so they will not be repeated.

[0041] In one embodiment, the metal sensor 53 is a capacitive proximity sensor, which is composed of a high-frequency oscillator and an amplifier. The sensor detection surface and the outside world form a capacitor, which participates in the oscillation circuit and is initially in an oscillating state. When an object approaches the sensor detection surface, the circuit capacitance changes, causing the high-frequency oscillator to oscillate. The two states of oscillation and stop are converted into electrical signals and converted into binary switch signals by the amplifier. Principle of high-frequency oscillation: The inductive proximity sensor is composed of high-frequency oscillation, detection, amplification, triggering and output circuits. The oscillator sensor detection surface generates an alternating electromagnetic field. When a metal object approaches the sensor detection surface, eddy currents are generated in the metal to absorb the oscillator energy, causing the oscillation to weaken and stop. The two states of oscillation and stop of the oscillator are converted into electrical signals, shaped and amplified, and converted into binary switch signals, which are output after power amplification. Therefore, when the positioning hole 11 of the retainer 1 rotates to the detection position of the metal sensor 53, the metal sensor 53 can send a switch signal converted into an electrical signal.

[0042] Preferably, the pre-positioning mechanism 5 also includes a fixed block 54, which is fixed to the bottom of the telescopic rod 52. The fixed block 54 is provided with a strip-shaped sliding hole 541 for accommodating the metal sensor 53. The metal sensor 53 can slide along the extension direction of the strip-shaped sliding hole 541 to facilitate adjustment of the position of the metal sensor 53 and increase the applicable range of the metal sensor 53 for different types of retainers 1.

[0043] Preferably, a plurality of threaded holes 542 connected to the strip sliding hole 541 are also provided at the bottom of the fixing block 54. The threaded holes 542 are evenly distributed along the extension direction of the strip sliding hole 541. The fastening bolts 543 pass through the threaded holes 542 and abut against the metal sensor 53 to fix the fastening bolts 543 in the strip sliding hole 541.

[0044] In one embodiment, when the metal sensor 53 is used for the first time, the position of the metal sensor 53 needs to be adjusted so that the axis of the metal sensor 53 and the trajectory circle where the positioning hole 11 is located have an intersection, and different types of retainers 1 are used. Specifically, the metal sensor 53 is slid along the strip-shaped sliding hole 541, and after the position of the metal sensor 53 is determined, the metal sensor 53 is squeezed and fixed with a fastening bolt 543.

[0045] Preferably, the pre-positioning mechanism 5 also includes a fixing plate 55, an arc-shaped hole 511 is opened on the fixing frame 51, and a limiting hole 551 is opened on the fixing plate 55. The adjusting bolt passes through the arc-shaped hole 511 and is screwed to the limiting hole 551, so as to adjust the deflection angle of the fixing frame 51, and indirectly adjust the deflection angle of the metal sensor 53, so as to facilitate the metal sensor 53 to accurately measure the position of the positioning hole 11 of the retainer 1.

[0046] In one embodiment, in order to improve the punching quality, the conical bearing retainer 1 located on the receiving punch is usually in an inclined state, and the deflection angle of the metal sensor 53 can be adjusted by adjusting the fixing frame 51, so that the axis of the metal sensor 53 is parallel to the axis of the receiving punch. Specifically, the deflection angle of the fixing frame 51 relative to the fixing plate 55 can be adjusted through the arc hole 511 on the fixing frame 51, and then fixed with an adjusting bolt.

[0047] Preferably, a transverse slide rail 34 is provided at the bottom of the punching tool 3, and the punching tool 3 has an initial position and an impact position. The punching tool 3 can move from the initial position to the impact position along the transverse slide rail 34. When the punching tool 3 moves to the impact position, the retainer 1 installed on the positioning plate 31 is located between the punch 22 and the punching die 21, thereby realizing the position movement of the retainer 1, which facilitates the punching machine 2 to perform punching operations on the retainer 1.

[0048] Preferably, a longitudinal slide rail 43 is provided at the bottom of the loading fixture 4, and the loading fixture 4 has a loading position and a unloading position. The loading fixture 4 can move from the loading position to the unloading position along the longitudinal slide rail 43. When the loading fixture 4 is in the loading position, the loading equipment installs the retainer 1 material to the receiving punch; when the loading fixture 4 is in the unloading position, the receiving punch can transfer the retainer 1 material to the positioning plate 31.

[0049] Preferably, a transverse slide 44 is also provided on the loading tooling 4, and the material receiving punch is slidably connected to the transverse slide 44. The material receiving punch slides along the transverse slide 44 to transfer and install the retainer 1 to the positioning plate 31, thereby realizing the docking installation of the retainer 1 and the positioning plate 31, which is convenient for installation.

[0050] Preferably, the positioning plate 31 is installed at an angle to the loading tool 4, and the loading tool 4 also includes a conical adjuster 45, which can adjust the inclination angle of the loading tool 4. The axis of the positioning plate 31 is parallel to the axis of the receiving punch, which facilitates the movement of the retainer 1 on the receiving punch to the positioning plate 31.

[0051] In one embodiment, in order to improve the punching quality of the tapered bearing retainer 1, the bottom of the tapered bearing retainer 1 needs to be parallel to the punching die 21 during punching. At this time, the tapered bearing retainer 1 needs to be in an inclined state, that is, the positioning plate 31 is in an inclined state, and then the loading tooling 4 needs to be adjusted to an inclined state to facilitate the receiving punch to quickly transfer the retainer 1 to the positioning plate 31.

[0052] Preferably, the punch press 2 also includes a driving device 23, which is fixedly connected to the punch 22. The driving device 23 can drive the punch 22 to move back and forth in the vertical direction. A punching groove 211 is provided on the punching die 21 to achieve rapid punching operation of the retainer 1.

[0053] Preferably, the surface of the material receiving punch is coated with a Teflon coating, which has a low friction coefficient and excellent wear resistance, thereby reducing the installation resistance when the retainer 1 is installed on the material receiving punch and increasing the service life of the material receiving punch.

[0054] When the above-mentioned retainer punching pre-positioning device is used, the metal sensor 53 is used to sense the positioning hole 11 of the retainer 1 located on the receiving punch to achieve pre-positioning of the retainer 1, and then the receiving punch directly installs the retainer 1 to the positioning plate 31, without the need for rotational positioning when installing the retainer 1, thereby reducing the time for the receiving punch to install the retainer 1 on the positioning plate 31 and improving the punching efficiency of the retainer 1; and since the retainer 1 on the receiving punch is pre-positioned in advance, when the receiving punch installs the retainer 1 to the positioning plate 31, the positioning hole 11 of the retainer 1 and the positioning rod 33 of the positioning plate 31 can be on the same axis, and when the receiving punch drives the retainer 1 to move toward the positioning plate 31, the positioning hole 11 of the retainer 1 and the positioning rod 33 of the positioning plate 31 are plugged and fixed, and the rotational positioning step between the retainer 1 and the positioning rod 33 is eliminated, thereby eliminating the wear on the retainer 1 and the positioning rod 33.

[0055] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A retainer punching pre-positioning device, wherein a positioning hole is provided on the retainer, characterized in that: The pre-positioning device comprises: A punch press, comprising a punching die and a punch; A punching tool, on which a positioning plate and a ratchet motor for driving the positioning plate to rotate are installed, the positioning plate is provided with a positioning rod that matches the positioning hole, and the positioning plate is pressed and matched with the retainer; A material feeding tool, on which a material receiving punch and a motor for driving the material receiving punch to rotate are installed, and the material receiving punch is magnetically matched with the retainer; The pre-positioning mechanism comprises a fixing frame, a telescopic rod mounted on the fixing frame, and a metal sensor fixed to the end of the telescopic rod, wherein the metal sensor can detect the position of the positioning hole, and the metal sensor is connected to the motor signal.

2. A retainer punching pre-positioning device according to claim 1, characterized in that: The pre-positioning mechanism further comprises a fixing block, which is fixed to the bottom of the telescopic rod. The fixing block is provided with a strip-shaped sliding hole for accommodating the metal sensor, and the metal sensor can slide along the extension direction of the strip-shaped sliding hole.

3. A retainer punching pre-positioning device according to claim 2, characterized in that: The bottom of the fixing block is also provided with a plurality of threaded holes connected to the strip-shaped sliding hole, the threaded holes are evenly distributed along the extension direction of the strip-shaped sliding hole, and the fastening bolts penetrate through the threaded holes and abut against the metal sensor.

4. A retainer punching pre-positioning device according to claim 2, characterized in that: The pre-positioning mechanism also includes a fixing plate, an arc-shaped hole is formed on the fixing frame, a limiting hole is formed on the fixing plate, and an adjusting bolt passes through the arc-shaped hole and is screwed to the limiting hole.

5. A retainer punching pre-positioning device according to claim 1, characterized in that: A transverse slide rail is provided at the bottom of the punching tool. The punching tool has an initial position and an impact position. The punching tool can move from the initial position to the impact position along the transverse slide rail. When the punching tool moves to the impact position, the retainer installed on the positioning plate is located between the punch and the punching die.

6. A retainer punching pre-positioning device according to claim 1, characterized in that: A longitudinal slide rail is provided at the bottom of the loading tool, and the loading tool has a loading position and a unloading position. The loading tool can move from the loading position to the unloading position along the longitudinal slide rail. When the loading tool is in the loading position, the loading equipment installs the retainer material to the receiving punch; when the loading tool is in the unloading position, the receiving punch can transfer the retainer material to the positioning plate.

7. A retainer punching pre-positioning device according to claim 6, characterized in that: The loading tool is also provided with a transverse slide, and the material receiving punch is slidably connected to the transverse slide. The material receiving punch slides along the transverse slide to transfer and install the retainer to the positioning plate.

8. A retainer punching pre-positioning device according to claim 1, characterized in that: The positioning plate is installed obliquely to the feeding tool, and the feeding tool also includes a conical adjuster, which can adjust the inclination angle of the feeding tool, and the axis of the positioning plate is parallel to the axis of the receiving punch.

9. A retainer punching pre-positioning device according to claim 1, characterized in that: The punch press also includes a driving device, which is fixedly connected to the punch and can drive the punch to move back and forth in a vertical direction. A punching groove is provided on the punching die.

10. A retainer punching pre-positioning device according to claim 1, characterized in that: The surface of the material receiving convex mold is coated with Teflon coating.

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