Ring milling device for PVC pipe machining

Abstract

The invention relates to the technical field of PVC pipe machining, in particular to a ring milling device for PVC pipe machining, which comprises a base, a lifter, a controller and two rotators, the lifter is mounted in the center of the upper surface of the base, the controller is mounted at the front end of the upper surface of the lifter, and the two rotators are respectively mounted at the left and right ends of the top of the base. The controller is electrically connected with the rotator, a positioning mechanism electrically connected with the controller is installed at the output end of the rotator, and a ring milling mechanism electrically connected with the controller is installed at the output end of the lifter. Manual tool setting is not needed, the labor intensity of workers is greatly reduced, and the machining efficiency is remarkably improved; the whole set machining effect is achieved, the meshing precision of butt joint threads is effectively guaranteed, and the sealing performance of PVC pipes after connection is greatly improved; the PVC pipe can adapt to use requirements of different application occasions and different conveying fluid pressures, the problem of pipeline leakage caused by insufficient thread length is solved, and the application range of equipment is widened.

Description

Technical Field

[0001] This invention relates to the field of PVC pipe processing technology, specifically a ring milling device for PVC pipe processing. Background Technology

[0002] PVC pipes are synthetic materials made of polyvinyl chloride resin, stabilizers, lubricants, etc., through hot pressing. As the world's second most used synthetic material, it has significant characteristics such as corrosion resistance and low cost, and is widely used in many fields such as drainage, water supply and chemical fluid transportation.

[0003] In practical applications of PVC pipes, connection methods are mainly divided into two categories: hot-melt interference fit and threaded connection. Among them, threaded connection occupies an important position in the installation and maintenance of various pipeline systems due to its outstanding advantage of easy disassembly and replacement. However, in scenarios such as water system renovation that require threading of PVC pipes, the existing processing equipment is mainly based on traditional milling machines, which has many problems that urgently need to be solved: First, when processing PVC pipes of different outer diameters, manual adjustment of the tool position and tool setting operation are required, which not only increases the labor intensity of workers but also seriously restricts processing efficiency; Second, traditional milling machines can only perform threading of a single PVC pipe and cannot simultaneously perform internal and external threading of two PVC pipes to be connected, which can easily lead to poor thread engagement after connection, affecting the sealing of the pipeline connection; Third, due to differences in PVC pipe application and fluid pressure, the required threading length varies, but existing equipment is difficult to flexibly adjust the threading length. When the thread length is insufficient, it is very easy to cause pipeline leakage problems, which cannot meet the needs of different working conditions. Summary of the Invention

[0004] The purpose of this invention is to solve the existing problems of not being able to automatically align the tool according to the outer diameter of the PVC pipe, not being able to process in sets, and having difficulty adjusting the thread processing length.

[0005] The present invention achieves the above-mentioned objective through the following technical solution: a ring milling device for processing PVC pipes, comprising a base, a lifting device, a controller, and two rotators. The lifting device is installed at the center of the upper surface of the base, the controller is installed at the front end of the upper surface of the lifting device, and the two rotators are respectively installed at the left and right ends of the top of the base. The controller is electrically connected to the rotators. A positioning mechanism electrically connected to the controller is installed at the output end of the rotators, and a ring milling mechanism electrically connected to the controller is installed at the output end of the lifting device. Under the control of the controller, the positioning mechanism clamps the PVC pipe, and at the same time, the positioning mechanism, based on the electrical signal fed back by the controller according to the outer radial direction of the PVC pipe, causes the controller to drive the lifting device to drag the ring milling mechanism upward to a specified height. The positioning mechanism includes a base installed at the output end of the rotator. The outer wall of the base has an opening. Three clamping blocks are inserted equidistantly along the circumference of the inner side of the base. The clamping blocks move towards the center to clamp the PVC pipe. A pin is installed on the outer end of the right side wall of the clamping blocks. Several limit switches electrically connected to the controller are installed along the circumference of the inner wall of the base. The controller identifies the electrical signals fed back by the limit switches at different positions and controls the lifting device to drive the ring milling mechanism to rise to a specified height.

[0006] Specifically, the positioning mechanism also includes a turntable mounted on the inner wall of the base via bearings. One end of a cylinder electrically connected to the controller is mounted on the outer wall of the base via a pin. The other end of the cylinder is connected to the outer wall of the turntable via a pin. The cylinder drives the turntable to rotate. Several guide grooves are provided on the outer wall of the turntable. Pins are inserted into the inner cavity of the guide grooves. An extrusion block is installed on the outer wall of the turntable. By using the guide groove and pin to move the clamping blocks synchronously, the PVC pipe can be centered and clamped.

[0007] Specifically, several of the guide grooves are distributed clockwise on the outer wall of the turntable.

[0008] Specifically, the upper and lower sides of the extrusion block are inclined surfaces, and the extrusion block and the limit switch are in the same plane.

[0009] Specifically, the ring milling mechanism includes a housing installed at the output end of the lifting device. A drive assembly is installed at the bottom of the inner cavity of the housing, and a milling assembly is installed at the top of the inner cavity of the housing. The drive assembly drives the milling assembly to move laterally to tap the inner and outer walls of the PVC pipe. A thread depth control assembly is installed at the bottom of the left side wall of the housing to adjust the rotation angle of the drive assembly.

[0010] Specifically, the drive assembly includes a first motor installed at the bottom of the right side wall of the housing. The first motor is electrically connected to the controller. A roller is installed at the output end of the first motor. The left end of the roller is installed on the left inner wall of the housing via a bearing. Two left-right opposing sliding grooves are opened on the outer wall of the roller. A swing rod is installed at the left end of the roller. By converting rotational motion into linear motion and providing two power output points with the same moving distance, complete processing of PVC pipes can be achieved.

[0011] Specifically, the grooves are distributed in an arc shape on the outer wall of the drum.

[0012] Specifically, the milling assembly includes two guide rods installed on the top of the inner cavity of the housing. Two left-right opposing movable seats are sleeved on the outer wall of the guide rods. Rollers that insert into the inner cavity of the slide groove are installed at the bottom of the movable seats. Two left-right opposing brackets are inserted into the outer wall of the housing. The inner side of the brackets is installed with the movable seats. A second motor electrically connected to the controller is installed on the top of the outer wall of the brackets. One end of the shaft is locked to the output end of the second motor through a coupling. A tapping disc is installed on the other end of the shaft. When the second motor drives the tapping disc to rotate, the tapping disc grinds the PVC pipe and mills threads into the PVC pipe.

[0013] Specifically, there is a height difference between the two tapping discs.

[0014] Specifically, the thread depth control assembly includes an annular seat installed at the bottom of the left side wall of the housing and concentric with the roller. The outer wall of the annular seat has a first slide rail, and the left side wall of the annular seat has a second slide rail communicating with the first slide rail. A slide rod is installed in the inner cavity of the first slide rail, and a slide seat is sleeved on the outer wall of the slide rod. A brake bolt is screwed to the left side wall of the slide seat. When the brake bolt is turned to contact the outer wall of the annular seat, the slide seat is positioned. A proximity switch electrically connected to the controller is installed on the rear side of the slide seat. The proximity switch and the swing rod are in the same plane. Adjusting the trigger point of the rocker arm controls the rotation angle of the roller, thereby adjusting the thread processing length.

[0015] The beneficial effects of this invention are: 1. This invention uses a cylinder-driven positioning mechanism to rotate a turntable. The inclined guide grooves and pins on the turntable form a transmission connection, which drives three clamping blocks to move synchronously towards the center, achieving centering and clamping of the PVC pipe. This effectively avoids thread processing deviations caused by clamping offset. Simultaneously, during the turntable's rotation, the extrusion blocks on its outer wall trigger corresponding limit switches on the inner wall of the base. The controller accurately determines the outer diameter of the PVC pipe by recognizing the electrical signals fed back from the limit switches and automatically drives the lifting device to raise the ring milling mechanism to the appropriate height. This eliminates the need for manual tool setting, significantly reducing the labor intensity of workers and greatly improving processing efficiency.

[0016] 2. The first motor in the drive assembly of the ring milling mechanism drives the drum to rotate. The arc-shaped grooves on the outer wall of the drum cooperate with the rollers at the bottom of the moving seat of the milling assembly to convert the rotational motion into linear motion, driving the two moving seats to move outward in opposite directions synchronously. In conjunction with the rotation of the tapping disc driven by the second motor, and the height difference between the two tapping discs, the external and internal threads of the PVC pipe can be processed simultaneously, achieving a complete processing effect. This effectively ensures the meshing accuracy of the mating threads and greatly improves the sealing performance of the PVC pipe after connection.

[0017] 3. The thread depth control component slides on the slide rod of the ring seat via a slide block, which can flexibly adjust the installation position of the proximity switch, and then lock the position with a brake bolt; by using the cooperation between the proximity switch and the swing rod at the left end of the drive component drum, the rotation angle of the drum can be precisely controlled, thereby realizing the flexible adjustment of the thread processing length. PVC pipes can be adapted to different application occasions and different fluid pressure requirements, fundamentally solving the pipeline leakage problem caused by insufficient thread length and broadening the application range of the equipment. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the positioning mechanism of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a perspective view of the ring milling mechanism of the present invention; Figure 5 This is a perspective view of the driving component of the present invention; Figure 6 This is a perspective view of the milling component of the present invention; Figure 7 This is a perspective view of the thread depth control component of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of section B in the middle.

[0019] In the diagram: 1. Base; 2. Lifter; 3. Controller; 4. Rotator; 5. Positioning mechanism; 6. Ring milling mechanism; 51. Base; 52. Opening; 53. Clamping block; 54. Pin; 55. Limit switch; 56. Turntable; 57. Cylinder; 58. Guide groove; 59. Extrusion block; 61. Housing; 62. Drive assembly; 63. Milling assembly; 64. Thread depth control assembly; 621. First motor; 622. Roller; 623. Slide groove; 624. Rocker arm; 631. Guide rod; 632. Moving seat; 633. Roller; 634. Bracket; 635. Second motor; 636. Rotating shaft; 637. Tapping disc; 641. Ring seat; 642. First slide rail; 643. Second slide rail; 644. Slide rod; 645. Slide seat; 646. Brake bolt; 647. Proximity switch. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of the present invention easier to understand, the preferred embodiments of the present invention are further described below in conjunction with specific embodiments and accompanying drawings.

[0021] Please see Figure 1-8This invention provides a ring milling device for processing PVC pipes, including a base 1, a lifting device 2, a controller 3, and two rotators 4. The lifting device 2 is installed at the center of the upper surface of the base 1, the controller 3 is installed at the front end of the upper surface of the lifting device 2, and the two rotators 4 are respectively installed at the left and right ends of the top of the base 1. The controller 3 is electrically connected to the rotators 4. The output end of the rotators 4 is equipped with a positioning mechanism 5 electrically connected to the controller 3, and the output end of the lifting device 2 is equipped with a ring milling mechanism 6 electrically connected to the controller 3. Under the control of the controller 3, the positioning mechanism 5 clamps the PVC pipe. At the same time, the positioning mechanism 5 feeds back an electrical signal from the controller 3 based on the outer radial direction of the PVC pipe, causing the controller 3 to drive the lifting device 2 to drag the ring milling mechanism 6 upward to a specified height. The positioning mechanism 5 includes a base 51 installed at the output end of the rotary device 4. An opening 52 is provided on the outer wall of the base 51, providing space for the turntable 56 to move. Three clamping blocks 53 are equidistantly inserted into the inner side of the base 51 along the circumference. The clamping blocks 53 move centripetally to clamp the PVC pipe. A pin 54 is installed on the outer end of the right side wall of each clamping block 53. The outer wall of the pin 54 is circular, allowing for smooth movement within the guide groove 58. Several limit switches 55 electrically connected to the controller 3 are installed circumferentially on the inner wall of the base 51. The controller 3 identifies the electrical signals fed back from the limit switches 55 at different positions and controls the lifting device 2 to raise the ring milling mechanism 6 to a specified height. The positioning mechanism 5 also includes a turntable 56 mounted on the inner wall of the base 51 via bearings. The outer wall of the base 51 is connected to the turntable 56 via pins. One end of a cylinder 57, which is electrically connected to the controller 3, is mounted on the shaft. The other end of the cylinder 57 is connected to the outer wall of the turntable 56 via a pin. The cylinder 57 drives the turntable 56 to rotate. Several guide grooves 58 are provided on the outer wall of the turntable 56. Pins 54 are inserted into the inner cavity of the guide grooves 58. The guide grooves 58 are distributed clockwise on the outer wall of the turntable 56. When the turntable 56 rotates clockwise or counterclockwise, the inclined surfaces of the guide grooves 58 press the pins 54 outward or inward, so that the clamping block 53 moves away from or closer to the pins. An extrusion block 59 is installed on the outer wall of the turntable 56. The upper and lower sides of the extrusion block 59 are inclined surfaces, and the extrusion block 59 and the limit switch 55 are in the same plane. When the extrusion block 59 makes a circular motion, one inclined surface of the extrusion block 59 can trigger the limit switch 55, and the other inclined surface is responsible for the rotation of the turntable 56.

[0022] As a preferred embodiment, the ring milling mechanism 6 further includes a housing 61 installed at the output end of the lifting device 2. A drive assembly 62 is installed at the bottom of the inner cavity of the housing 61, and a milling assembly 63 is installed at the top of the inner cavity of the housing 61. The milling assembly 63 is driven to move laterally by the drive assembly 62 to tap the inner and outer walls of the PVC pipe. A thread depth control assembly 64 is installed at the bottom of the left side wall of the housing 61 to adjust the rotation angle of the drive assembly 62.

[0023] As a preferred embodiment, the drive assembly 62 further includes a first motor 621 installed at the bottom of the right side wall of the housing 61. The first motor 621 is electrically connected to the controller 3. A roller 622 is installed at the output end of the first motor 621. The left end of the roller 622 is mounted to the left inner wall of the housing 61 via a bearing. Two left-right opposing sliding grooves 623 are opened on the outer wall of the roller 622. The sliding grooves 623 are arc-shaped and distributed on the outer wall of the roller 622. When the roller 622 rotates clockwise or counterclockwise, the sliding grooves 623 press the roller 633 outward or inward at an angle, thereby realizing the synchronous reverse movement of the moving seat 632. A swing rod 624 is installed at the left end of the roller 622.

[0024] As a preferred embodiment, the milling assembly 63 further includes two guide rods 631 mounted on the top of the inner cavity of the housing 61. Two opposing movable seats 632 are sleeved on the outer wall of the guide rods 631. The guide rods 631 are horizontally positioned to provide conditions for the horizontal movement of the movable seats 632. Rollers 633 are installed at the bottom of the movable seats 632 and inserted into the inner cavity of the slide groove 623. When the rollers 633 roll in the slide groove 623, the rolling friction between the rollers 633 and the slide groove 623 results in minimal mechanical wear, ensuring sliding stability. Two opposing brackets 6 are inserted into the outer wall of the housing 61. 34. The bracket 634 is installed on the inner side of the movable seat 632. The second motor 635, which is electrically connected to the controller 3, is installed on the top of the outer wall of the bracket 634. The output end of the second motor 635 is locked to one end of the rotating shaft 636 through a coupling. The other end of the rotating shaft 636 is equipped with a tapping disc 637. When the second motor 635 drives the tapping disc 637 to rotate, the tapping disc 637 grinds the PVC pipe and mills threads into the PVC pipe. There is a height difference between the two tapping discs 637. The lower one is used for internal thread processing of PVC pipe, and the higher one is used for external thread processing of PVC pipe.

[0025] As a preferred embodiment, the thread depth control assembly 64 further includes an annular seat 641 concentric with the roller 622 and mounted on the bottom of the left side wall of the housing 61. The annular seat 641 has a length scale on its left side as reference data for thread processing length. A first slide rail 642 is formed on the outer wall of the annular seat 641, and a second slide rail 643 communicating with the first slide rail 642 is formed on the left side wall of the annular seat 641. The second slide rail 643 provides space for the movement of the brake bolt 646. The inner cavity of the first slide rail 642 is equipped with... The slide rod 644 has a slide seat 645 sleeved on its outer wall. The slide rod 644 is arc-shaped, allowing the slide seat 645 to slide in a circle, ensuring that the proximity switch 647 rotates around the center of the roller 622. A brake bolt 646 is screwed onto the left side wall of the slide seat 645. When the brake bolt 646 is turned and contacts the outer wall of the annular seat 641, it positions the slide seat 645. A proximity switch 647, which is electrically connected to the controller 647, is installed on the rear side of the slide seat 645. The proximity switch 647 and the swing rod 624 are in the same plane.

[0026] Working principle: Step 1: The PVC pipe passes through the base 51 and is driven by the cylinder 57 to rotate the turntable 56. The guide groove 58 is inclined to press the pin 54 inward, causing the clamping block 53 to move towards the center and clamp the PVC pipe. At this time, the turntable 56 stops at the current position. The pressing block 59 triggers the limit switch 55 at the current position. After receiving the electrical signal from the limit switch 55, the controller 3 identifies the size of the PVC pipe and causes the lifting device 2 to drive the ring milling mechanism 6 to rise to the specified height, thereby realizing the clamping of the PVC pipe and the tool setting. Step 2: The first motor 621 drives the roller 622 to rotate clockwise, causing the groove 623 to press the roller 633 outward at an angle. The two moving seats 632 move away simultaneously, and the tapping disc 637 gradually approaches the PVC pipe. The rotator 4 drives the PVC pipe to rotate, and the second motor 635 drives the tapping disc 637 to rotate. Due to the height difference between the two tapping discs 637, one tapping disc 637 mills threads on the outer wall of the PVC pipe, and the other tapping disc 637 mills threads on the inner wall of the PVC pipe. Since the rocker arm 624 follows the rotation of the roller 622, when the rocker arm 624 passes the proximity switch 647, the proximity switch 647 sends an electrical signal to the controller 3, causing the tapping disc 637 to retract, thus completing the tapping of the PVC pipe. Step 3: When it is necessary to control the tapping length, move the slide block 645 along the slide rod 644 to change the proximity switch 647, and turn the brake bolt 646 to contact the ring seat 641 to position the moved proximity switch 647, thereby changing the rotation angle of the roller 622 and controlling the tapping length of the PVC pipe.

[0027] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A ring milling device for processing PVC pipes, comprising a base (1), a lifting device (2), a controller (3), and two rotators (4), wherein the lifting device (2) is installed at the center of the upper surface of the base (1), the controller (3) is installed at the front end of the upper surface of the lifting device (2), and the two rotators (4) are respectively installed at the left and right ends of the top of the base (1), and the controller (3) is electrically connected to the rotators (4), characterized in that, The output end of the rotator (4) is equipped with a positioning mechanism (5) electrically connected to the controller (3), and the output end of the lifter (2) is equipped with a ring milling mechanism (6) electrically connected to the controller (3). Under the control of the controller (3), the positioning mechanism (5) clamps the PVC pipe, and at the same time, the positioning mechanism (5) feeds back the electrical signal from the controller (3) on the outer radial direction of the PVC pipe, so that the controller (3) drives the lifter (2) to drag the ring milling mechanism (6) upward to a specified height. The positioning mechanism (5) includes a base (51) installed at the output end of the rotator (4). An opening (52) is provided on the outer wall of the base (51). Three clamping blocks (53) are inserted equidistantly along the circumference of the inner side of the base (51). The clamping blocks (53) move towards the center to clamp the PVC pipe. A pin (54) is installed on the outer end of the right side wall of the clamping block (53). Several limit switches (55) electrically connected to the controller (3) are installed along the circumference of the inner wall of the base (51). The controller (3) identifies the electrical signals fed back by the limit switches (55) at different positions and controls the lifter (2) to drive the ring milling mechanism (6) to rise to the specified height.

2. The ring milling device for PVC pipe processing according to claim 1, characterized in that, The positioning mechanism (5) also includes a turntable (56) mounted on the inner wall of the base (51) via a bearing. One end of a cylinder (57) electrically connected to the controller (3) is mounted on the outer wall of the base (51) via a pin. The other end of the cylinder (57) is connected to the outer wall of the turntable (56) via a pin. The cylinder (57) drives the turntable (56) to rotate. Several guide grooves (58) are provided on the outer wall of the turntable (56). Pins (54) are inserted into the inner cavity of the guide grooves (58). An extrusion block (59) is installed on the outer wall of the turntable (56).

3. The ring milling device for PVC pipe processing according to claim 2, characterized in that, Several of the guide grooves (58) are distributed clockwise on the outer wall of the turntable (56).

4. The ring milling device for processing PVC pipes according to claim 3, characterized in that, The extrusion block (59) has inclined surfaces on both the top and bottom, and the extrusion block (59) and the limit switch (55) are in the same plane.

5. A ring milling device for processing PVC pipes according to claim 4, characterized in that, The ring milling mechanism (6) includes a housing (61) installed at the output end of the lifting device (2). A drive assembly (62) is installed at the bottom of the inner cavity of the housing (61), and a milling assembly (63) is installed at the top of the inner cavity of the housing (61). The milling assembly (63) is driven to move laterally by the drive assembly (62) to tap the inner and outer walls of the PVC pipe. A thread depth control assembly (64) is installed at the bottom of the left side wall of the housing (61) to adjust the rotation angle of the drive assembly (62).

6. The ring milling device for PVC pipe processing according to claim 5, characterized in that, The drive assembly (62) includes a first motor (621) installed at the bottom of the right side wall of the housing (61). The first motor (621) is electrically connected to the controller (3). A roller (622) is installed at the output end of the first motor (621). The left end of the roller (622) is installed on the left inner wall of the housing (61) via a bearing. Two left-right opposing sliding grooves (623) are opened on the outer wall of the roller (622). A swing rod (624) is installed at the left end of the roller (622).

7. A ring milling device for processing PVC pipes according to claim 6, characterized in that, The groove (623) is distributed in an arc shape on the outer wall of the roller (622).

8. The ring milling device for PVC pipe processing according to claim 7, characterized in that, The milling assembly (63) includes two guide rods (631) installed on the top of the inner cavity of the housing (61). Two left-right opposing movable seats (632) are sleeved on the outer wall of the guide rods (631). Rollers (633) that are inserted into the inner cavity of the slide groove (623) are installed at the bottom of the movable seats (632). Two left-right opposing brackets (634) are inserted into the outer wall of the housing (61). The inner side of the brackets (634) is installed with the movable seats (632). A second motor (635) that is electrically connected to the controller (3) is installed on the top of the outer wall of the brackets (634). One end of the shaft (636) of the output end of the second motor (635) is locked with a coupling. A tapping disc (637) is installed on the other end of the shaft (636). When the second motor (635) drives the tapping disc (637) to rotate, the tapping disc (637) grinds the PVC pipe and mills threads into the PVC pipe.

9. A ring milling device for processing PVC pipes according to claim 8, characterized in that, There is a height difference between the two tapping discs (637).

10. A ring milling device for processing PVC pipes according to claim 9, characterized in that, The thread depth control assembly (64) includes an annular seat (641) installed on the bottom of the left side wall of the housing (61) and concentric with the roller (622). The outer wall of the annular seat (641) is provided with a first slide rail (642). The left side wall of the annular seat (641) is provided with a second slide rail (643) communicating with the first slide rail (642). A slide rod (644) is installed in the inner cavity of the first slide rail (642). A slide seat (645) is sleeved on the outer wall of the slide rod (644). A brake bolt (646) is screwed to the left side wall of the slide seat (645). When the brake bolt (646) is turned and contacts the outer wall of the annular seat (641), the slide seat (645) is positioned. A proximity switch (647) electrically connected to the controller (647) is installed on the rear side of the slide seat (645). The proximity switch (647) and the swing rod (624) are in the same plane.

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