A thread chasing machine

Abstract

The utility model discloses a thread rethreading machine, including base and tap, the top of base is sequentially provided with organism, infrared photoelectric switch and push assembly, the inside of organism is provided with power output shaft, and the one end of power output shaft away from organism is fixedly installed with floating assembly, the floating assembly includes guide sleeve and connecting piece. This thread rethreading machine, the axial force that tap touches workpiece processing will increase, and the axial impact force is buffered through the compression buffer spring in the process that the guide rod is moved along the guide sleeve inwards the organism direction by tap to push, avoids the damage of tap or the deformation of thread because of hard top, and the small amplitude radial floating of tap is produced to the tap of floating chuck, and the small amplitude radial deviation of tap 5 and workpiece hole is compensated due to error, prevents rigid cutting and leads to tap damage or thread distortion, and the automatic centering is realized through axial floating buffer impact force and radial floating, and the stable processing is completed.

Description

Technical Field

[0001] This utility model relates to the field of parts processing technology, specifically a thread rewinding machine. Background Technology

[0002] A nut is a common fastener used to secure bolts or screws. It is typically a hexagonal or round metal part with an internally threaded hole. The nut's function is to engage with the bolt or screw, achieving a tightening and fixing effect through rotation. To improve the corrosion resistance of nuts, hot-dip galvanizing is used. However, during hot-dip galvanizing, an excessively thick zinc layer can easily occur, making assembly with components such as bolts difficult. In such cases, it is usually necessary to re-thread the original threads, requiring the use of thread re-threading equipment. The existing patent authorization announcement number CN222370803U discloses an internal thread rewinding device. By fixing the tap on the motor drive shaft, the device automatically rewinds and repairs the internal thread by rotating the tap and screwing it into the internal thread of the nut. A position sensor is used to detect the degree of screwing in the nut and stop processing in time. In addition, the workpiece can be retracted by reversing the motor to facilitate the processing of the next workpiece. Therefore, this utility model is beneficial to improving production efficiency, reducing production costs and labor intensity of workers. In the aforementioned patent, the tap and nut are in direct rigid contact. The force applied at the moment of contact between the tap and the workpiece is too great, making it difficult to buffer the axial force. Furthermore, when there is a slight radial deviation between the threaded hole of the nut and the tap, the tap cannot be finely aligned, which may damage the tap and affect the workpiece processing effect. Utility Model Content

[0003] The purpose of this utility model is to provide a thread rewinding machine to solve the problems mentioned in the background art, such as the direct rigid contact between the tap and the nut, the excessive force applied at the moment of contact between the tap and the workpiece, the difficulty in buffering the axial force, and the inability to finely adjust the tap alignment when there is a slight radial deviation between the threaded hole of the nut and the tap, which may damage the tap and affect the workpiece processing effect.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a thread rewinding machine, comprising a base and a tap, wherein a body, an infrared photoelectric switch, and a pushing component are sequentially arranged on the top of the base; a power output shaft is provided on the inner side of the body, and a floating component is fixedly installed at the end of the power output shaft away from the body; the floating component includes a guide sleeve and a connector, the guide sleeve and the power output shaft are fixedly connected by the connector, a guide rod is provided inside the guide sleeve, a buffer spring is sleeved on the end of the guide rod outside the connector, and an adjusting nut is provided on the guide rod; the two ends of the buffer spring abut against the adjusting nut and the connector respectively; a floating chuck is fixedly connected to the end of the guide rod away from the body; a limiting sleeve is fixedly installed on the inner side of the body and sleeved outside the floating chuck; a ball bearing that fits against the inner wall of the limiting sleeve is movably engaged on the outer wall of the floating chuck; the floating chuck is used to install the tap.

[0005] Preferably, a fixing frame is fixedly connected to the outer side of the limiting sleeve, and the limiting sleeve is fixedly connected to the outer wall of the machine body through the fixing frame.

[0006] Preferably, the pushing component includes a skateboard platform and a fixing block. The skateboard platform is fixedly installed on the top of the base. The skateboard platform is provided with a slide and multiple guide rollers. The slide is slidably disposed between the multiple guide rollers. A connector is fixedly connected to the inner side of the slide. A slot is opened on the inner side of the connector. An insert plate that is locked in the slot is fixedly connected to the outer side of the fixing block. A fastening bolt that penetrates the insert plate is threaded on the top of the connector. A slot is opened at the end of the fixing block away from the penetrating insert plate.

[0007] Preferably, the slot is adapted to the size of the workpiece, and the outer wall of the fixing block is provided with an ejection port.

[0008] Compared with the prior art, the beneficial effects of this utility model are: 1. When the tap touches the workpiece during machining, the axial force it bears will increase. The tap pushes the guide rod to move along the guide sleeve towards the machine body. During this process, the buffer spring is compressed to buffer the axial impact force, avoiding damage to the tap or deformation of the thread due to hard cutting. The floating chuck causes the tap to float slightly radially, so that the tap automatically matches the original thread trajectory and compensates for the slight radial deviation between the tap 5 and the workpiece hole caused by error. This prevents damage to the tap or crooked thread due to rigid cutting. By buffering the impact force through axial floating and compensating for the radial deviation through radial floating, stable machining is completed. 2. Insert the outer plate of the fixing block into the slot, then tighten the fastening bolts to securely connect the fixing block and the connector. Next, place the nut workpiece into the slot. With the stable support provided by the sliding plate platform, the pushing component can apply a uniform force to prevent workpiece displacement. Suitable fixing blocks can be replaced according to different workpiece specifications to meet various processing requirements. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial schematic diagram of the structure of the floating component of this utility model; Figure 3 This is a cross-sectional schematic diagram of the internal structure of the limiting sleeve of this utility model; Figure 4 This is an exploded three-dimensional structural diagram of the push component of this utility model; Figure 5 This is a cross-sectional structural diagram of the fixing block of this utility model.

[0010] In the diagram: 1. Base; 2. Body; 3. Power output shaft; 4. Floating assembly; 41. Connector; 42. Guide sleeve; 43. Guide rod; 44. Buffer spring; 45. Adjusting nut; 46. Floating chuck; 47. Limit sleeve; 48. Ball bearing; 49. Fixing frame; 5. Tap; 6. Pushing assembly; 61. Slide platform; 62. Guide roller; 63. Carriage; 64. Connector; 65. Slot; 66. Fixing block; 67. Insert plate; 68. Fastening bolt; 69. Slot; 610. Push-out port; 7. Infrared photoelectric switch. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5This utility model provides a technical solution: a thread rewinding machine, including a base 1 and a tap 5. A body 2, an infrared photoelectric switch 7, and a pushing component 6 are sequentially arranged on the top of the base 1. A power output shaft 3 is arranged inside the body 2, with one end of the power output shaft 3 extending through the body 2 and fixedly mounted on a floating component 4. The floating component 4 includes a guide sleeve 42 and a connector 41. The guide sleeve 42 and the power output shaft 3 are fixedly connected by the connector 41, which acts as a coupling, axially connecting the guide sleeve 42 and the power output shaft 3. Connecting and transmitting torque, the guide sleeve 42 is internally fitted with a guide rod 43, which can slide along the axial direction of the guide sleeve 42. Simultaneously, the guide sleeve 42 transmits power to rotate the guide rod 43. A buffer spring 44 is fitted at one end of the guide rod 43 outside the connector 41, and an adjusting nut 45 is provided on the guide rod 43. The two ends of the buffer spring 44 abut against the adjusting nut 45 and the connector 41, respectively. A floating chuck 46 is fixedly connected to the end of the guide rod 43 away from the machine body 2. A chuck 46 is fixedly installed on the inner side of the machine body 2. The floating chuck 46 has a limiting sleeve 47 outside the movable chuck 46. A ball bearing 48 is movably engaged on the outer wall of the floating chuck 46, fitting against the inner wall of the limiting sleeve 47. The floating chuck 46 is used to mount the tap 5. When the tap 5 contacts the workpiece for machining, the axial force on the tap 5 increases. This force pushes the guide rod 43 towards the side of the machine body 2 via the floating chuck 46. The ball bearing 48 on the outer wall of the floating chuck 46 rolls within the limiting sleeve 47, providing guidance. The buffer spring 44 is compressed, causing the tap 5 to move slightly towards the machine body 2, buffering the axial impact force and preventing hard impact from causing damage to the tap. If tap 5 is damaged or the thread is deformed, and there is a slight misalignment between the workpiece and the axis of tap 5, tap 5 will abut against the chamfered edge of the threaded hole of the workpiece nut, since the edge of the threaded hole of the nut workpiece is usually chamfered. The floating chuck 46 drives tap 5 to make a slight radial movement, which compensates for the small radial deviation between tap 5 and the workpiece hole caused by error, and ensures that tap 5 and workpiece hole maintain the correct positional relationship. The axial floating buffers the impact force, and at the same time, the radial floating ensures that tap 5 and workpiece hole are aligned, completing a stable and efficient re-threading operation.

[0013] The adjusting nut 45 is located inside the buffer spring 44, and the buffer spring 44 abuts against the outside of the adjusting nut 45. By rotating the adjusting nut 45 along the thread provided on the outside of the guide rod 43, the preload of the buffer spring 44 can be changed, and the axial buffering capacity of the tap 5 can be adjusted. This allows the operator to flexibly adjust the buffering performance according to different workpiece specifications, ensuring that the impact force is effectively absorbed during the back threading process and that appropriate cutting force is maintained. At the same time, the adjusting nut 45 and the guide rod 43 have a self-locking function to prevent loosening.

[0014] The outer side of the limiting sleeve 47 is fixedly connected to the fixing frame 49. The limiting sleeve 47 is fixedly connected to the outer wall of the machine body 2 through the fixing frame 49. The fixing frame 49 plays a role in providing stable support, so that the limiting sleeve 47 remains stable on the machine body 2, and ensures the stable cooperation between the limiting sleeve 47 and the floating chuck 46.

[0015] A gap is provided between the limiting sleeve 47 and the floating chuck 46. The ball 48 is disposed inside the gap and closely adheres to the inner wall of the limiting sleeve 47. When the floating chuck 46 moves, it will carry the ball 48 to roll in the gap, reducing friction while providing a stable guiding effect for the floating chuck 46.

[0016] Please see Figure 4 and Figure 5 The pushing component 6 includes a sliding platform 61 and a fixing block 66. The sliding platform 61 is fixedly installed on the top of the base 1. The sliding platform 61 is provided with a carriage 63 and multiple guide rollers 62. The carriage 63 is slidably disposed between the multiple guide rollers 62. A connector 64 is fixedly connected to the inner side of the carriage 63. A slot 65 is opened on the inner side of the connector 64. An insert plate 67 is fixedly connected to the outer side of the fixing block 66 and is locked in the slot 65. A fastening bolt 68 that penetrates the insert plate 67 is threaded on the top of the connector 64. A slot 69 is opened at the end of the fixing block 66 away from the insert plate 67. By inserting the insert plate 67 on the outer side of the fixing block 66 into the slot 65 and tightening the fastening bolt 68, the fixing block 66 and the connector 64 are connected and fixed. Then, by placing the nut in the slot 69, the pushing component 6 can provide a uniform force through the stable support of the sliding platform 61, and avoid workpiece displacement. The corresponding fixing block 66 can be replaced according to different specifications of workpieces to adapt to various processing needs.

[0017] The slot 69 is adapted to the size of the workpiece, and the outer side of the fixing block 66 is provided with a push-out port 610. The slot 69 is arranged in a stepped shape. The design of the push-out port 610 facilitates the quick removal of the nut workpiece. By inserting a tool into the push-out port 610 and pushing it outward, the nut workpiece can be quickly pushed out of the slot 69, reducing operation time and improving work efficiency.

[0018] Please see Figure 1 The infrared photoelectric switch 7 is fixedly installed on the bracket and flush with the tap 5 and the push assembly 6. The infrared photoelectric switch 7 can accurately detect the position of the workpiece to ensure the accuracy of the processing. When the workpiece reaches the designated position, the infrared photoelectric switch 7 will immediately send a signal to control the tap 5 to stop and reverse after an interval, thereby achieving efficient thread backing. The infrared photoelectric switch 7 is installed through an adjustable bracket, and the position of the infrared photoelectric switch 7 can be flexibly adjusted by adjusting the position of the bracket.

[0019] Working principle: The machine body 2 drives the power output shaft 3 to rotate, and the power is transmitted to the guide sleeve 42 through the connector 41. The guide sleeve 42 acts on the guide rod 43 to rotate, which in turn drives the floating chuck 46 and the tap 5 to rotate, providing cutting power for the re-threading operation. By selecting a fixing block 66 that is compatible with the nut workpiece, the outer insert plate 67 is inserted into the slot 65, and the fixing bolt 68 is tightened to connect and fix the fixing block 66 to the connector 64. Then, by placing the nut in the slot 69, the slide 63 is pushed to make the nut workpiece abut against the tap 5. The tap 5 contacts the nut workpiece for processing. When the nut workpiece moves to the infrared photoelectric switch 7, it sends a signal to control the power output shaft 3 to stop rotating and then reverse after a delay to start the re-threading operation. During the machining process, when the tap 5 contacts the workpiece, it pushes the floating chuck 46 and the guide rod 43 to slide towards the side of the machine body 2. The ball 48 on the outside of the floating chuck 46 rolls towards the machine body 2 inside the limiting sleeve 47 to provide guidance for the floating chuck 46. The adjusting nut 45 outside the guide rod 43 moves relative to the guide sleeve 42 to compress the buffer spring 44, causing the tap 5 to move slightly outward. The deformation of the buffer spring 44 buffers the axial impact force, avoiding hard impact that could damage the tap 5 or deform the thread. When the axial pressure decreases, the buffer spring 44 rebounds, pushing the floating chuck 46 and the tap 5 to reset, ensuring continuous feed during the backfeed process. When the workpiece and the axis of tap 5 are slightly misaligned, tap 5 will abut against the chamfer edge of the threaded hole of the workpiece nut. The tap 5 installed on the floating chuck 46 will move slightly and generate radial floating, which allows tap 5 to automatically conform to the threaded hole of the workpiece, effectively compensating for the radial deviation between the workpiece and the guide rod 43, and avoiding damage to tap 5 or misalignment of the thread caused by rigid fixing and forced cutting along the original trajectory. The above is the working process of the whole device, and the contents not described in detail in this specification are all prior art known to those skilled in the art.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thread rewinding machine, comprising a base (1) and a tap (5), characterized in that: The top of the base (1) is arranged in sequence with an organism (2), an infrared photoelectric switch (7) and a push component (6). The inner side of the organism (2) is provided with a power output shaft (3). A floating component (4) is fixedly installed at the end of the power output shaft (3) away from the organism (2). The floating assembly (4) includes a guide sleeve (42) and a connector (41). The guide sleeve (42) and the power output shaft (3) are fixedly connected by the connector (41). A guide rod (43) is provided inside the guide sleeve (42). A buffer spring (44) is sleeved on one end of the guide rod (43) outside the connector (41), and an adjusting nut (45) is provided on the guide rod (43). The two ends of the buffer spring (44) abut against the adjusting nut (45) and the connector (41) respectively. A floating chuck (46) is fixedly connected to one end of the guide rod (43) away from the machine body (2). A limiting sleeve (47) is fixedly installed on the inner side of the machine body (2) and sleeved outside the floating chuck (46). A ball (48) that fits the inner wall of the limiting sleeve (47) is movably engaged on the outer wall of the floating chuck (46). The floating chuck (46) is used to install a tap (5).

2. A thread rewinding machine according to claim 1, characterized in that: The limiting sleeve (47) is fixedly connected to a fixing frame (49) on its outer side, and the limiting sleeve (47) is fixedly connected to the outer wall of the body (2) through the fixing frame (49).

3. A thread rewinding machine according to claim 1, characterized in that: The pushing component (6) includes a skateboard platform (61) and a fixing block (66). The skateboard platform (61) is fixedly installed on the top of the base (1). The skateboard platform (61) is provided with a slide (63) and a plurality of guide rollers (62). The slide (63) is slidably disposed between the plurality of guide rollers (62). A connector (64) is fixedly connected to the inner side of the slide (63). A slot (65) is opened on the inner side of the connector (64). An insert plate (67) is fixedly connected to the outer side of the fixing block (66) and is inserted into the slot (65). A fastening bolt (68) that penetrates the insert plate (67) is threaded on the top of the connector (64). A slot (69) is opened at the end of the fixing block (66) away from the penetrating insert plate (67).

4. A thread rewinding machine according to claim 3, characterized in that: The slot (69) is adapted to the size of the workpiece, and the outer wall of the fixing block (66) is provided with an ejection port (610).

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