CN212652446U - Double-pressure-head pipe winding machine - Google Patents

Abstract

The utility model discloses a two pressure heads are around pipe machine, include: the device comprises a case, a base, a tailstock assembly, a first rotary pressure head, a second rotary pressure head and a spindle assembly. The case is used for supporting all the components; the tailstock assembly is arranged on the screw nut and is driven by the screw nut to perform linear feeding motion; the main shaft assembly and the tailstock assembly are matched for clamping a workpiece and rotationally processing the workpiece; the first rotary pressure head and the second rotary pressure head are arranged in a mirror image mode and are respectively arranged on the two screw rod nuts and driven by the screw rod nuts to do linear feeding motion, and the two rotary pressure heads work according to respective motion tracks to roll and press the double-end heat exchange tube into a groove path of a processed workpiece.

Description

Double-pressure-head pipe winding machine

Technical Field

The utility model relates to a indirect heating equipment processing technology field, concretely relates to two pressure heads are around pipe machine.

Background

The pipe winding machine is special tooling equipment for processing the winding type heat exchanger, and the heat exchange element is wound on a groove path of a sleeve or a nozzle and other parts through the pipe winding machine, so that the pipe winding machine has a heat exchange effect. The wound heat exchanger has the advantages of uniform heat exchange, high heat exchange speed, compact structure, good adaptability and the like, and is widely applied to the fields of pharmacy, fine chemical engineering, food and beverage, heating ventilation and the like.

The existing pipe winding machine generally comprises a motor and supporting seats for supporting two ends of a central cylinder, the motor drives the central cylinder to rotate, the feeding direction and the position of a heat exchange pipe are manually controlled, and the heat exchange pipe is gradually wound on the central cylinder. The method is simple to operate, but the automation degree is low, the feeding direction and the position of the heat exchange tube are manually controlled, and the spiral direction of the heat exchange tube is difficult to ensure.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides a double-pressure-head pipe winding machine.

The utility model adopts the technical proposal that:

a dual pressure head tube-winding machine comprising:

a chassis for supporting all components;

the base is arranged on the case and comprises a box-type base body and a cover plate, screw and nut transmission pairs and ball screw transmission pairs are arranged in the box-type base body, two sets of ball screw transmission pairs are arranged in the box-type base body and symmetrically arranged on two sides of the screw and nut transmission pairs, and the screw and the two screws are arranged in parallel; the screw rod nut is used for connecting the tailstock assembly, the two screw rod nuts are respectively used for connecting the first rotary pressure head and the second rotary pressure head, the screw rod is driven to rotate by the stepping motor, and the screw rod is driven to rotate by the servo motor;

the tailstock assembly is arranged on the screw nut, is driven by the screw nut to perform linear feeding motion and comprises a rotating center for propping one end of a processed workpiece;

the main shaft assembly is arranged on the outer side of the box type seat body, is matched with the tailstock assembly to clamp the workpiece and comprises a transmission shaft driven by a servo motor to rotate, the head of the transmission shaft is connected with a chuck, and the chuck is used for clamping the other end of the machined workpiece and driving the machined workpiece to do rotary motion in a clockwise direction and a counterclockwise direction; and

the two rotary pressure heads arranged in a mirror image mode are respectively arranged on the two screw rod nuts and driven by the screw rod nuts to do linear feeding motion, and the two rotary pressure heads work according to respective motion tracks to roll and press the double-end heat exchange tube into a groove path of a machined workpiece.

Furthermore, the rotary pressure head comprises a rotary pressure head support, a transmission seat, a screw nut assembly, a spline assembly, a servo motor, a compression cylinder and a compression bar assembly; the rotary pressure head support is used for supporting and mounting a rotary pressure head, the transmission seat is mounted on the top surface of the rotary pressure head support, and the servo motor and the pressing cylinder are respectively mounted on the transmission seat through the supports; be equipped with criss-cross first installation cavity and second installation cavity in the transmission seat, screw nut subassembly is installed in first installation cavity, and spline unit mount is in the second installation cavity, and screw nut subassembly includes trapezoidal screw rod and the inside circular rack that becomes trapezoidal thread that processes, and trapezoidal screw rod is rotated by servo motor drive, and the screw nut transmission is vice with trapezoidal screw rod constitution to the inside screw thread of circular rack. The spline assembly comprises a hollow spline shaft, a spline housing and a gear arranged on the periphery of the spline housing, the hollow spline shaft can be slidably sleeved in the spline housing and synchronously rotates with the spline housing, and the gear on the periphery of the spline housing is meshed with the circular rack to form a gear-rack transmission pair; two ends of the hollow spline shaft extend out of the transmission seat, the upper end of the hollow spline shaft is connected with a piston rod of the compression cylinder, and the lower end of the hollow spline shaft is connected with a compression bar component; the lower end of the pressure lever component is provided with a roller for pressing the heating pipe into a path of a processing workpiece groove.

The hollow spline shaft axial cavity is provided with a piston connecting piece, a hollow spline shaft and a hollow spline shaft, and the hollow spline shaft is axially provided with a cavity; the upper end of the pressure lever is clamped in the hollow spline shaft, the lower end of the pressure lever is connected with the roller, and the roller is matched with the groove path of the processing workpiece.

Furthermore, the periphery of the pressure lever is connected with a linear bearing in a sliding fit manner, and the linear bearing is arranged in the transmission seat; the spline housing is rotatably installed in the transmission seat through the spline bearing housing sleeved at the upper end of the spline housing and the linear bearing isolation sleeve sleeved at the lower end of the spline housing, and the lower end face of the linear bearing isolation sleeve abuts against the upper end face of the linear bearing.

Further, the periphery cover that compresses tightly the cylinder support is equipped with the sensor collar, and the sensor collar is used for installing position sensor.

Further, the main shaft assembly comprises a support main body, a hollow transmission shaft, a push rod, a chuck assembly, a transition sleeve, a collision rod support, a servo motor, a worm speed reducer and a cylinder; the hollow transmission shaft is rotatably arranged in the support main body through a bearing, two ends of the hollow transmission shaft extend out of the support main body, the front end of the hollow transmission shaft is sleeved with a transition sleeve, the rear end of the hollow transmission shaft is fixedly connected with a worm wheel of a worm speed reducer, the transition sleeve and the hollow transmission shaft synchronously rotate and are axially slidably connected, the end surface of the head part of the hollow transmission shaft and the bottom wall of an inner cavity of the transition sleeve are provided with a transition sleeve moving interval, the front end of the transition sleeve is connected with a chuck component, and a servo motor drives the; the chuck component comprises a chuck, a pressing plate and a screw, wherein an axial through hole for clamping a processed workpiece is arranged in the chuck, a radial groove for accommodating the pressing plate is formed in the upper side wall of the axial through hole, and the front end of the pressing plate is rotatably arranged in the radial groove of the chuck through a rotating shaft; the front end of the hollow transmission shaft is provided with a radial open slot, the bottom surface of the open slot is an inclined plane, the transition sleeve is provided with a radial through hole, and a screw spirally penetrates through the rear end of the pressing plate and the head of the radial through hole of the transition sleeve to abut against the inclined plane of the open slot of the hollow transmission shaft; the push rod can slidably penetrate through the hollow transmission shaft, the head part of the push rod is accommodated in the hollow transmission shaft, and the tail part of the push rod extends out of the worm speed reducer; the striker is rotatably arranged on a striker bracket through a rotating shaft, the striker bracket is arranged at the lower end of the rear side of the casing of the worm speed reducer, the air cylinder is arranged on the rear side surface of the support main body, an air cylinder piston rod is hinged with the lower end of the striker, the air cylinder extends out to push the striker to rotate, and the upper end part of the striker impacts the tail part of the push rod.

Furthermore, the front end of the push rod is connected with a spring, one end of the spring is propped against the bottom wall of the inner cavity of the transition sleeve, and the other end of the spring is fixed at the head of the push rod.

Furthermore, the hollow transmission shaft and the transition sleeve are connected through a positioning key, the positioning key is clamped into a key groove on the transition sleeve, the key groove stroke of the hollow transmission shaft is longer than that of the transition sleeve, and the length difference is matched with the moving distance of the transition sleeve.

Further, linear guide rails are arranged between the base screw rod and the screw rods and on the outer sides of the two screw rods, and the linear guide rails are used for guiding and limiting the screw nuts and the screw rod nuts.

Further, the tailstock comprises a tailstock frame, a tailstock body, a Morse No. 3 taper sleeve and a Morse No. 3 rotating center; the tailstock frame is used for being connected with a base screw rod nut seat, the tailstock body is installed on the tailstock frame, the Morse 3 taper sleeve is fixedly sleeved in the tailstock body, the tail portion of the Morse 3 rotating center is inserted into the Morse 3 taper sleeve, and the center of the Morse 3 taper sleeve is concentric with a transmission shaft of the spindle assembly.

The utility model has the advantages that:

1. the utility model provides a two pressure heads are around pipe machine can realize following clockwise and anticlockwise two directions and convolute, can utilize mechanical structure self-holding and release processing work piece through tailstock subassembly and main shaft assembly's cooperation, and is simple reliable, practices thrift the cost, and machining efficiency is high. The double rotary pressure heads independently wind the tube, so that the limitation of a designer on the design of the heat exchange element can be eliminated. When products of different specifications are produced, only the pressing wheel die and the workpiece chuck die need to be replaced, and the adaptability is good.

2. The application has strong applicability around the pipe machine, two pressure head rollers can follow the independent rotation control of the path, and simultaneously, the linear motion is made along the machine lead screw, the pressure head rotation angle unilateral can reach 100 degrees, the pressure head servo motor rotates a circle, and the angle of the pressure head rotation is 6.614 degrees. The cylinder can apply different pressures to the compression bar assembly along the axial direction, and can also lift the roller along different positions and sizes of the workpiece, so that the processing precision is higher. In the spindle part, the clamping and releasing of the workpiece are realized by a mechanical link mechanism, so that the spindle part is simple and reliable, the manual operation and the electrical control are omitted, and the cost is saved. The maximum workpiece to be processed is 510 mm.

Drawings

Fig. 1 is a schematic perspective view showing a double-pressure-head pipe winding machine according to a first embodiment of the present invention.

Fig. 2 is a schematic view of the three-dimensional structure of the base of the double-pressure head pipe winding machine of the present invention.

Fig. 3 is a schematic view of the three-dimensional structure of the tail assembly of the double-ram pipe winding machine of the present invention.

Fig. 4 is a schematic view of the three-dimensional structure of the rotary pressure head of the double-pressure-head pipe winding machine of the present invention.

Figure 5 is the structure sketch map of the pressure head assembly of the rotary pressure head of the utility model.

Fig. 6 is a schematic perspective view of the main shaft assembly of the double-ram pipe winding machine of the present invention.

Fig. 7 is an exploded view of the chuck assembly, the transition sleeve and the transmission shaft of the spindle assembly according to the present invention.

Detailed Description

For a better understanding of the present invention, the following examples are provided to further illustrate the present invention, but the present invention is not limited to the following examples.

Referring to fig. 1, the present embodiment provides a dual-pressure-head pipe winding machine, including: the machine comprises a machine box 10, a base 20, a tailstock assembly 30, a first rotary pressure head 40, a second rotary pressure head 50 and a spindle assembly 60. The chassis 10 is used to support all components; the base 20 is arranged on the case 10, a screw and nut transmission pair and a ball screw transmission pair are arranged in the base, the screw is driven to rotate by a stepping motor, and the screw is driven to rotate by a servo motor; the tailstock assembly 30 is arranged on the screw nut and is driven by the screw nut to perform linear feeding motion; the main shaft assembly 60 is arranged on the outer platform of the box type seat body and is matched with the tailstock assembly 30 to clamp a workpiece and rotationally process the workpiece; the first rotary pressure head 40 and the second rotary pressure head 50 are arranged in a mirror image mode, are respectively arranged on the two screw rod nuts and are driven by the screw rod nuts to do linear feeding motion, and work according to respective motion tracks to roll and press the double-head heat exchange tube into a groove path of a processed workpiece. The structure of each component will be described in detail below.

The case 10 is used to support all components, and various button switches, tool boxes, electrical cable supports, etc. may be disposed on the case, for example, a drawer assembly 70 is disposed for placing tools.

As shown in fig. 2, the base member 20 includes a box-type base 21, a cover plate 24, a trapezoidal screw 28, a trapezoidal screw nut holder 280, a stepping motor 23, a gear box 22, two servo motors 25, a screw support base 26, two ball screws 27, a ball screw nut holder 270, and four linear guide rails 29. The box base assembly 21 is a base platform for mounting other components. The trapezoidal screw 28 is installed at the middle part in the box body of the box-type base 21, the ball screws 27 are respectively installed at both sides of the trapezoidal screw 28, and the linear guide rails 29 are respectively installed between the trapezoidal screw 28 and the ball screws 27 and outside the ball screws 27. The stepping motor 23 and the gear box 22 are mounted on the outer side of the box-type base 21, and two servo motors 25 are mounted on the other side of the box-type base 21 opposite to the stepping motor 23. The stepping motor 23 transmits power to the trapezoidal screw 28 through the gear box 22, and drives the trapezoidal screw nut seat 280 to move, and the trapezoidal screw nut seat 280 is used for mounting the tailstock component. The servo motor 25 transmits power to the ball screw 27 to drive the ball screw nut holder 270 to move, and is supported by the screw support base 26. Two ball screw nut mounts 270 are used to mount two rotating ram assemblies. Four linear guide rails 29 are used for guiding the linear movement of one trapezoidal screw nut base 280 and two ball screw nut bases 270. The cover plate 24 is used to cover the box-type base assembly. The cover plate 24 is provided with a strip-shaped groove for exposing the connecting position of the trapezoidal screw nut seat 280 and the ball screw nut seat 270.

As shown in fig. 3, the tailstock 30 includes a tailstock frame 31, a nylon baffle 32, an inner hexagonal socket head screw 33, an a-shaped cylindrical pin 34, a tailstock body 35, a morse 3 taper sleeve 36, an inner hexagonal socket head screw 37, and a morse 3 rotating center 38. The tailstock frame 31 is used for connecting the trapezoidal screw nut seat 280 and supporting the tailstock component. For convenient installation and disassembly, the tailstock frame 31 is designed to be a rectangular frame formed by welding profile steels, and the front side and the rear side of the rectangular frame are sealed by nylon baffles 32. The tailstock body 35 is installed on the upper side face of the tailstock frame 31 through the inner hexagonal socket head cap screw 33, the taper sleeve 36 is sleeved in the tailstock body 35, the Morse No. 3 taper sleeve 36 is in concentric transition fit connection with the tailstock body 35, the taper sleeve 36 and the tailstock body 35 are locked and fixed through the inner hexagonal socket head cap screw 37, and the Morse No. 3 taper sleeve 36 is inserted into the tail of the Morse No. 3 rotating centre 38. In order to make the center of the rotating center 38 coaxial with the center of the spindle, an a-shaped cylindrical pin 34 is provided between the tailstock frame 31 and the tailstock body 35 for precise positioning during installation.

Referring to fig. 6 and 7, the spindle assembly 60 includes a support main body 61, a hollow transmission shaft 63, a push rod 64, a collet assembly, a transition sleeve 65, a ram 618, a ram bracket 621, a servo motor 619, a worm reducer 620 and a cylinder 622; the hollow transmission shaft 63 is rotatably arranged in the support main body 61 through a bearing, two ends of the transmission shaft extend out of the support main body, the front end of the transmission shaft is sleeved with a transition sleeve 65, the rear end of the transmission shaft is fixedly connected with a worm wheel of the worm speed reducer 620, and the transition sleeve 65 and the hollow transmission shaft 63 synchronously rotate and are axially connected in a sliding manner; the end face of the head of the hollow transmission shaft 62 and the bottom wall of the inner cavity of the transition sleeve 65 are provided with a transition sleeve moving distance, the front end of the transition sleeve 63 is connected with a chuck component, and the servo motor 619 drives the hollow transmission shaft 63 to rotate through a worm speed reducer 620; the chuck component comprises a chuck 66, a pressing plate 67 and a screw 610, wherein an axial through hole for clamping a processed workpiece is arranged in the chuck 66, a radial groove for accommodating the pressing plate is formed in the upper side wall of the axial through hole, the front end of the pressing plate 67 is rotatably arranged in the radial groove of the chuck 66 through a rotating shaft, a radial open groove is formed in the front end of the hollow transmission shaft 63, the bottom surface of the open groove is an inclined plane, a radial through hole is formed in the transition sleeve 65, and the screw 610 spirally penetrates through the rear end of the pressing plate 67 and the radial through hole of the transition sleeve 65, and the head; the push rod 618 can slidably penetrate through the hollow transmission shaft 63, the head of the push rod 618 is accommodated in the hollow transmission shaft 63, and the tail of the push rod 618 extends out of the worm speed reducer 620; the plunger 618 is rotatably disposed on a plunger support 621 through a rotating shaft, the plunger support 621 is mounted at the lower end of the rear side of the casing of the worm speed reducer 620, the cylinder 622 is mounted at the rear side surface of the support body 1, a piston rod of the cylinder is hinged to the lower end of the plunger 618, the cylinder 622 extends to push the plunger 618 to rotate, and the upper end of the plunger 618 impacts the tail of the push rod 64.

Observing from the side, the support main body 61 is an inverted L-shape, and comprises a transmission shaft mounting part extending along the horizontal direction and a supporting part extending along the vertical direction, wherein the bottom of the supporting part is provided with a support bottom plate 62, and the rear end face of the supporting part is used for mounting the cylinder 622. The transmission shaft installation part is internally provided with a transmission shaft installation cavity extending along the horizontal direction, and the rear end face of the transmission shaft installation part is used for installing a worm speed reducer 620 and a servo motor 619. In the present embodiment, the worm speed reducer 620 is mounted on the rear end surface of the drive shaft mounting portion via a speed reducer fixing plate 615. The servo motor 619 is directly connected to the worm reducer 620. The support main body 61 is mounted on the rack table on one side of the base of the pipe winding machine through a support base plate 62 by four hexagon socket head cap screws.

The hollow transmission shaft 63 is rotatably mounted in a transmission shaft mounting cavity of the support main body 61 through two deep groove ball bearings 612, the deep groove ball bearing on the front side is positioned through a bearing gland 611, the deep groove ball bearing on the rear side is positioned through a bearing spacer 613 and a thrust ball bearing 614, the bearing spacer 613 is connected with the thrust ball bearing 614 and sleeved on the transmission shaft 63, the front end face of the bearing spacer 613 abuts against the outer ring of the deep groove ball bearing, the rear end face abuts against the outer ring of the thrust ball bearing 614, and the thrust ball bearing 614 is mounted on the rear side face of the support main body 61. The thrust ball bearing can bear larger axial thrust generated when the top of the tailstock part props against a machined workpiece. The inner diameter of the shaft cavity of the hollow transmission shaft 63 is matched with the outer diameter of the plunger. The rear end of the hollow transmission shaft 63 is connected with a servo motor 619 through a worm speed reducer 620, and the hollow transmission shaft 63 is driven to rotate by the servo motor 619. The front end of the hollow transmission shaft 63 is connected with a transition sleeve 65 through a positioning key 69. The upper side surface of the front end of the hollow transmission shaft 63 is provided with a radial open slot, and the bottom surface of the open slot is an inclined plane.

The transition sleeve 65 is cylindrical, the inner diameter of the cylinder is matched with the outer diameter of the hollow transmission shaft 63, two key grooves 651 are symmetrically arranged on the side wall of the cylinder, and a through hole for penetrating through a screw of the chuck assembly is formed in the upper side wall of the cylinder. The hollow transmission shaft 63 is provided with two key slots 631 at positions corresponding to the transition sleeve 65, the key slots 631 and the key slots 651 are equal in width, the length of the key slots 631 is longer than that of the key slots 651, and the length difference is matched with the moving distance of the transition sleeve. The positioning key 69 comprises a key body matched with the radian of the transition sleeve 65 and a key body matched with the key groove of the transition sleeve 65 in length and width. The key body of the positioning key 69 is slidably disposed in the key slot 631 of the hollow drive shaft 63 through the key slot 651 of the transition sleeve 65. The transition sleeve 65 and the hollow transmission shaft 63 are matched through a positioning key 69 and key grooves 631 and 651 to realize synchronous rotation and axial slidable connection.

An axial through hole for clamping a machined workpiece is formed in the chuck 66, and a radial groove for accommodating the pressing plate 67 is formed in the upper side wall of the axial through hole. The screw 610 is screwed through the threaded hole of the pressure plate 67 and the radial through hole of the transition sleeve 65, and the head of the screw abuts against the inclined surface of the open slot of the transmission shaft 63. The pressing plate 67 is in a downward opening v shape when viewed from the side, a pressing head is arranged at the front end of the v-shaped pressing plate, a threaded hole is formed in the rear end of the v-shaped pressing plate, the pressing plate 67 is rotatably fixed on the chuck 66 through a rotating shaft, and the front end of the pressing plate is accommodated in a radial groove of the chuck 66.

The push rod 64 axially and slidably penetrates through the push rod mounting cavity of the transmission shaft 63, the head of the push rod 64 is accommodated in the push rod mounting cavity of the transmission shaft 63, the front end of the push rod 64 is connected with a spring 68, one end of the spring 68 abuts against the bottom wall of the inner cavity of the transition sleeve 65, and the end part of the other end of the spring is fixed at the head of the push rod 64; the spring 68 serves to resiliently couple the transition sleeve 65 to the push rod 64. The rear end of the push rod 64 slidably passes through the axial cavity of the worm reducer 620, and the rear end part of the push rod is connected with a collision block 617. The striking block 617 is screwed into a threaded hole at the tail of the push rod 64 like a screw, and the radial dimension of the striking block 617 is larger than the diameter of the push rod, so that the striking area is increased. The material is wear-resistant and the impact is more reliable.

The plunger 618 is in a straight shape, the upper end of the plunger is rotatably mounted on a plunger support 621 through a rotating shaft, the plunger support 621 can be fixed on the casing of the worm speed reducer 620 through a screw, and the end part of the lower end of the plunger is hinged to the head of a piston rod of the cylinder 622. The piston rod of the cylinder 622, the plunger 618 and the plunger support 621 form a link mechanism.

As shown in fig. 4, the first rotary ram 40 is identical in construction to the second rotary ram 50, and both are mounted in mirror image with respect to a vertical plane passing through the axis of the work piece being machined. The structure and operation of the first rotary ram 40 will be described by way of example.

The rotary pressure head 40 comprises a rotary pressure head support 419, a transition support 415, a transmission seat 427, a screw nut component, a spline component, a servo motor 49, a pressing cylinder 424 and a pressure rod component; the transition bracket 415 is used for supporting and mounting a rotary pressure head, the transmission seat 427 is arranged on the top surface of the transition bracket 415 through the rotary pressure head bracket 419, and the servo motor 49 and the pressing cylinder 424 are respectively arranged on the transmission seat 427 through brackets; a first mounting cavity and a second mounting cavity which are crossed are arranged in the transmission seat 427, and the first mounting cavity extends along the horizontal direction; the screw and nut assembly is installed in the first installation cavity, the spline assembly is installed in the second installation cavity, the screw and nut assembly comprises a trapezoidal screw 42 and a circular rack 41 which is internally processed into trapezoidal threads, the trapezoidal screw 42 is driven by a servo motor 49 to rotate, and the internal threads of the circular rack 41 and the trapezoidal screw 42 form a screw and nut transmission pair. The spline assembly comprises a hollow spline shaft, a spline housing and a gear arranged on the periphery of the spline housing, the hollow spline shaft can be slidably sleeved in the spline housing and synchronously rotates with the spline housing, and the gear on the periphery of the spline housing is meshed with the circular rack 41 to form a gear-rack transmission pair; two ends of the hollow spline shaft extend out of the transmission seat, the upper end of the hollow spline shaft is connected with a piston rod of the pressing cylinder 424, and the lower end of the hollow spline shaft is connected with a pressure rod assembly; the lower end of the pressure bar component 417 is provided with a roller for pressing the heating pipe into the path of the workpiece groove.

The transition support 415, which serves to support and secure the entire rotary ram, is shaped to fit the lead screw nut seat of the wire winder base, and comprises, for example, a rectangular frame welded from section steel, the bottom surface of which is connected to the lead screw nut seat of the base member by means of a cylindrical pin 412 and a screw 414, and the top surface of which is used to connect to the rotary ram support 419. The periphery of the upper part of the rectangular frame is sealed by a first sealing plate 416 of the pressure head support and a second sealing plate 413 of the pressure head support. The transition support 415 is convenient to mount and dismount, and the sealing plate can prevent sundries from falling into the transition support.

The rotary indenter holder 419 is of a right-angled triangular holder structure, the triangular holder structure is stable, the transmission seat 427 can be installed on the fixed point of the triangular holder, and the transmission seat 427 and the rotary indenter holder 419 can keep a certain angle. For example, the bottom surface of the triangular bracket may be secured to the top surface of the transition bracket 415 by screws 411, with the apex of the triangular bracket being used to attach the actuator mount.

The transmission seat 427 comprises a first installation part extending along the horizontal direction and a second installation part obliquely arranged with the first installation part in a cross manner, wherein a first installation cavity is arranged in the first installation part, a second installation cavity is arranged in the second installation part, and the two installation cavities are communicated in a cross manner. For easy to assemble and disassemble, the transmission seat can be designed into a split type, namely, the transmission seat comprises a transmission seat base and a transmission seat cover, and the transmission seat cover is connected with the transmission seat base through a screw. The bottom of the second mounting portion of the actuator 427 is fixed to the top surface of the rotary ram support 419, i.e., the fixed point of the triangular support, by screws. The servo motor 49 is mounted to the outside of the first mounting portion of the driving seat 427 through the indenter motor bracket 47.

The pressing cylinder 424 is connected with a cylinder mounting bracket 426 through a cylinder connecting plate 425 arranged at the top of the cylinder body and is locked and fixed through a cylinder pressing plate 45, and the cylinder mounting bracket 426 is arranged at the top of the transmission seat 427 through a screw. In this embodiment, the cylinder mounting bracket 426 has a connecting flange at the upper end thereof, and the cylinder connecting plate 425 is fitted to the connecting flange of the cylinder mounting bracket 426 and connected thereto by a connecting bolt. The structure of cylinder clamp plate 45 is that the middle part is equipped with the compact heap in U type groove, and the opening width in U type groove and cylinder connecting plate 425 and cylinder mounting bracket 426 flange's thickness and adaptation utilize cylinder clamp plate 45 to compress tightly cylinder connecting plate 425 and cylinder mounting bracket 426 flange and be connected, prevent to compress tightly cylinder 424 axial float. The cylinder pressure plate 45 can be fixed and limited by screws, and in the embodiment, the number of the cylinder pressure plates is two, and the cylinder pressure plates are symmetrically arranged on the pressing cylinder 424.

The screw nut assembly includes a trapezoidal screw 42 and a circular rack 41 internally formed with trapezoidal threads. The trapezoidal screw 42 is rotatably arranged in the first mounting cavity of the transmission seat 427 through the ball bearings 46 at the two ends, and the circular rack 41 is spirally sleeved on the trapezoidal screw 42 to form a screw nut transmission pair with the trapezoidal screw 42. The first mounting portion is closed at both ends by bearing caps 428. One end of the trapezoidal screw rod 42 extends out of the transmission seat 427 and is connected with a servo motor 49 through a coupler 48, and the servo motor 49 drives the trapezoidal screw rod 42 to rotate.

The spline assembly comprises a hollow spline shaft, a spline housing and a gear arranged on the periphery of the spline housing. The spline housing is rotatably mounted in the second mounting cavity of the transmission seat through a spline bearing housing 422 sleeved on the upper end of the spline housing and a linear bearing isolation housing 420 sleeved on the lower end of the spline housing, and the lower end face of the linear bearing isolation housing 420 abuts against the upper end face of a linear bearing 418 sleeved on a compression bar of the hollow spline shaft and compression bar assembly 417. The spline housing is sleeved on the hollow spline shaft and rotates synchronously with the hollow spline shaft, the outer surface of the hollow spline shaft is provided with a linear guide bar, the inner surface of the spline housing is matched with the linear guide bar, and the hollow spline shaft can axially slide in the spline housing. The gear on the periphery of the spline housing is meshed with the circular rack 41 to form a gear-rack transmission pair. The linear bearing spacer 420 and the spline bearing 422 play a role in axially positioning the spline sleeve, and the linear bearing 418 is used for guiding the hollow spline shaft and the pressure bar assembly during linear motion.

As shown in fig. 5, the lever assembly 417 comprises a roller 4171, a lever 4172, a link 4173 and a link housing 4174. The pressure lever 4172 is cylindrical, the top of the pressure lever is provided with a reduced circular table part for connecting the hollow spline shaft, two sides of the circular table part are provided with planes 1741 matched with the hollow spline shaft, and the bottom of the pressure lever is provided with a conical part which is connected with the roller 4171 through a rotating shaft. The connecting rod sleeve 174 is in a stepped cylindrical shape, threads matched with the connecting rod 173 are arranged in the cylinder, the small-diameter outer diameter of the cylinder is matched with the inner diameter of the spline cavity, and a clamping groove used for connecting the piston rod connecting piece 23 is formed in the periphery of the large end of the cylinder. The connecting rod 4173 penetrates through the central cavity of the hollow spline shaft, the upper end of the connecting rod 4173 is in threaded connection with the connecting rod sleeve 4174, the lower end of the connecting rod sleeve 4173 is in threaded connection with the pressure rod 4173, the connecting rod sleeve 4174 is clamped into the piston rod connecting piece 423 through a clamping groove in the top of the connecting rod sleeve, the whole assembly is driven by the air cylinder piston to stretch, the length limit of the hollow spline shaft can be compensated through the design of the connecting rod and the connecting rod sleeve; the pressure lever 4172 is clamped at the lower end of the hollow spline shaft through planes on two sides of the top of the pressure lever 4172 and is driven by the hollow spline shaft to rotate; the hollow spline shaft is clamped between the shoulder of the connecting rod sleeve 4174 and the boss of the pressure rod 4172. The linear bearing 418 is connected to the outer periphery of the pressure lever 4172 in a sliding fit manner, and the linear bearing 418 is installed in the transmission seat 427. The linear bearing 418 is used for guiding the plunger 4172 when moving up and down. The lower end of the linear bearing 418 is provided with a bearing baffle 43, and the bearing baffle 43 is used for blocking the linear bearing 418 and preventing the outer side of the linear bearing from loosening and moving outwards when the cylinder applies pressure.

In this embodiment, the lower end of the hollow spline shaft extends obliquely downward away from the rotary indenter holder 419, and the axis of the hollow spline shaft is inclined at an angle of 22.5 degrees to a vertical plane passing vertically through the axis of the workpiece to be machined. The angle is the minimum angle which ensures that the left and right rotary pressure head parts do not collide in the moving process. The smaller the angle is, the more vertical the axis of the roller of the rotary pressure head is to the workpiece, and the better the processing effect is.

The sensor mounting ring 430 has the same structure as the sensor mounting ring 429 and is composed of half rings, the two half rings are connected and fastened through screws at two sides to form a circular ring structure, and the circular ring is sleeved on the cylinder mounting frame 426. Two semi-rings simple to operate, and be convenient for adjust the elasticity. Each semi-ring is provided with a sensor mounting hole, the corresponding position of the corresponding cylinder mounting rack 426 is also provided with a sensor mounting hole, the sensor mounting hole is used for mounting a position sensor, and the position sensor is used for detecting the rotation angle of the internal hollow spline shaft to acquire position information.

The working method of the application comprises the following steps:

clamping a workpiece: firstly, clamping one end of a processed workpiece in a chuck 66 of a spindle assembly 60, and propping the other end of the processed workpiece against a Morse No. 3 rotating center 38 of a tailstock component 30; starting the stepping motor 23 to drive the trapezoidal screw 28 to rotate, and driving the tailstock part 30 to move towards the spindle part 60 by the trapezoidal screw nut seat 280; when pressure is applied to the tailstock component 30, the chuck 66 and the transition sleeve 65 move towards the front gland 611 together, the screw 610 drives the chuck 66 and the transition sleeve 65 to move towards the large end of the transmission shaft along the inclined plane at the front end of the transmission shaft 63, the screw 610 is lifted in the radial direction to drive the rear end of the pressure plate 67 to be slightly lifted, the pressure head at the front end of the pressure plate 67 is pressed downwards to clamp a workpiece, and the spring 68 is compressed under stress;

preparation before processing the workpiece: the servo motor 49 drives the trapezoidal screw 42 to rotate to drive the circular rack 41 to do linear motion, the circular rack 41 drives the gear on the spline housing 421 to do rotary motion, and the spline housing drives the hollow spline shaft to rotate, so that the compression bar assembly 417 connected to the hollow spline shaft is driven to rotate, and the deflection angle of the roller 4171 is matched with the helical angle of the processed workpiece; starting the pressing cylinder 424, extending a piston rod of the pressing cylinder 424 to drive the pressing rod assembly 417 to move linearly downwards, so that the roller 4171 is in contact with the surface of the heating pipe; in order to improve the accuracy of controlling the deflection angle of the roller, a position sensor may be installed in the sensor mounting ring 430 and the sensor mounting ring 429, and the deflection angle of the spline shaft may be detected by the position sensor.

And (3) processing a wound pipe: starting the base servo motor 25, driving the rotary pressure heads 40 and 50 to do linear motion along the axial direction of the processed workpiece by the screw rod nut seat 270, and gradually pressing the heat exchange tube into the groove path of the processed workpiece by the roller 171;

releasing the workpiece: after the machining is completed, the air cylinder 422 is pushed out, the striking rod 418 strikes the push rod striking block 417, the push rod striking block 417 pushes the push rod 44 to move forwards in the transmission shaft 43, the spring 48 pushes the chuck 66 and the transition sleeve 65 for a micro-stroke, the screw 610 moves downwards, the pressure plate 67 tilts, and therefore the workpiece is released.

In order to accurately control the moving positions of the tailstock assembly 30 and the rotary rams 40 and 50, a position sensor can be arranged at the original point of the initial position of the transmission shaft in the spindle assembly 60, after the machining is finished, the rotary ram firstly returns to the original point, the spindle motor rotates to the original point to stop rotating, then the tailstock assembly returns to the original point, finally, the cylinder in the spindle assembly is pushed out, the workpiece is released, and the machining is finished.

When the equipment produces products with different specifications, a pinch roller die and a workpiece chuck die need to be replaced, and the position of each origin sensor needs to be adjusted.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A dual-pressure-head tube winding machine, comprising:

a chassis for supporting all components;

the base is arranged on the case and comprises a box-type base body and a cover plate, screw and nut transmission pairs and ball screw transmission pairs are arranged in the box-type base body, two sets of ball screw transmission pairs are arranged in the box-type base body and symmetrically arranged on two sides of the screw and nut transmission pairs, and the screw and the two screws are arranged in parallel; the screw rod nut is used for connecting the tailstock assembly, the two screw rod nuts are respectively used for connecting the first rotary pressure head and the second rotary pressure head, the screw rod is driven to rotate by the stepping motor, and the screw rod is driven to rotate by the servo motor;

the tailstock assembly is arranged on the screw nut, is driven by the screw nut to perform linear feeding motion and comprises a rotating center for propping one end of a processed workpiece;

the main shaft assembly is arranged on the outer side of the box type seat body, is matched with the tailstock assembly to clamp the workpiece and comprises a transmission shaft driven by a servo motor to rotate, the head of the transmission shaft is connected with a chuck, and the chuck is used for clamping the other end of the machined workpiece and driving the machined workpiece to do rotary motion in a clockwise direction and a counterclockwise direction; and

the two rotary pressure heads arranged in a mirror image mode are respectively arranged on the two screw rod nuts and driven by the screw rod nuts to do linear feeding motion, and the two rotary pressure heads work according to respective motion tracks to roll and press the double-end heat exchange tube into a groove path of a machined workpiece.

2. The dual ram tube winder of claim 1, wherein the rotary ram comprises a rotary ram support, a drive mount, a screw and nut assembly, a spline assembly, a servo motor, a hold-down cylinder, and a ram assembly; the rotary pressure head support is used for supporting and mounting a rotary pressure head, the transmission seat is mounted on the top surface of the rotary pressure head support, and the servo motor and the pressing cylinder are respectively mounted on the transmission seat through the supports; a first mounting cavity and a second mounting cavity which are crossed in a cross manner are arranged in the transmission seat, a screw nut component is mounted in the first mounting cavity, a spline component is mounted in the second mounting cavity, the screw nut component comprises a trapezoidal screw and a circular rack of which the interior is processed into trapezoidal threads, the trapezoidal screw is driven to rotate by a servo motor, and the threads inside the circular rack and the trapezoidal screw form a screw nut transmission pair; the spline assembly comprises a hollow spline shaft, a spline housing and a gear arranged on the periphery of the spline housing, the hollow spline shaft can be slidably sleeved in the spline housing and synchronously rotates with the spline housing, and the gear on the periphery of the spline housing is meshed with the circular rack to form a gear-rack transmission pair; two ends of the hollow spline shaft extend out of the transmission seat, the upper end of the hollow spline shaft is connected with a piston rod of the compression cylinder, and the lower end of the hollow spline shaft is connected with a compression bar component; the lower end of the pressure lever component is provided with a roller for pressing the heating pipe into a path of a processing workpiece groove.

3. The dual-pressure-head pipe winder according to claim 2, wherein the pressure lever assembly comprises a connecting rod, a connecting rod sleeve, a pressure lever and a roller, the connecting rod penetrates through the axial cavity of the hollow spline shaft, the upper end and the lower end of the axial cavity are respectively in threaded connection with the connecting rod sleeve and the pressure lever, and the connecting rod sleeve is connected to the piston connecting piece of the pressing cylinder in a clamping manner; the upper end of the pressure lever is clamped in the hollow spline shaft, the lower end of the pressure lever is connected with the roller, and the roller is matched with the groove path of the processing workpiece.

4. The double-pressure-head pipe winding machine according to claim 3, wherein the outer periphery of the pressure rod is connected with a linear bearing in a sliding fit manner, and the linear bearing is installed in the transmission seat; the spline housing is rotatably installed in the transmission seat through the spline bearing housing sleeved at the upper end of the spline housing and the linear bearing isolation sleeve sleeved at the lower end of the spline housing, and the lower end face of the linear bearing isolation sleeve abuts against the upper end face of the linear bearing.

5. The dual-pressure-head pipe winding machine according to claim 2, wherein a sensor mounting ring is sleeved on the outer periphery of the pressing cylinder support, and the sensor mounting ring is used for mounting the position sensor.

6. The dual-pressure-head pipe winding machine according to claim 1, wherein the main shaft assembly comprises a support main body, a hollow transmission shaft, a push rod, a chuck assembly, a transition sleeve, a ram bracket, a servo motor, a worm speed reducer and a cylinder; the hollow transmission shaft is rotatably arranged in the support main body through a bearing, two ends of the hollow transmission shaft extend out of the support main body, the front end of the hollow transmission shaft is sleeved with a transition sleeve, the rear end of the hollow transmission shaft is fixedly connected with a worm wheel of a worm speed reducer, the transition sleeve and the hollow transmission shaft synchronously rotate and are axially slidably connected, the end surface of the head part of the hollow transmission shaft and the bottom wall of an inner cavity of the transition sleeve are provided with a transition sleeve moving interval, the front end of the transition sleeve is connected with a chuck component, and a servo motor drives the; the chuck component comprises a chuck, a pressing plate and a screw, wherein an axial through hole for clamping a processed workpiece is arranged in the chuck, a radial groove for accommodating the pressing plate is formed in the upper side wall of the axial through hole, and the front end of the pressing plate is rotatably arranged in the radial groove of the chuck through a rotating shaft; the front end of the hollow transmission shaft is provided with a radial open slot, the bottom surface of the open slot is an inclined plane, the transition sleeve is provided with a radial through hole, and a screw spirally penetrates through the rear end of the pressing plate and the head of the radial through hole of the transition sleeve to abut against the inclined plane of the open slot of the hollow transmission shaft; the push rod can slidably penetrate through the hollow transmission shaft, the head part of the push rod is accommodated in the hollow transmission shaft, and the tail part of the push rod extends out of the worm speed reducer; the striker is rotatably arranged on a striker bracket through a rotating shaft, the striker bracket is arranged at the lower end of the rear side of the casing of the worm speed reducer, the air cylinder is arranged on the rear side surface of the support main body, an air cylinder piston rod is hinged with the lower end of the striker, the air cylinder extends out to push the striker to rotate, and the upper end part of the striker impacts the tail part of the push rod.

7. The dual pressure head tube winding machine of claim 6, wherein the front end of the push rod is connected to a spring, one end of the spring abuts against the bottom wall of the inner cavity of the transition sleeve, and the other end of the spring is fixed to the head of the push rod.

8. The dual pressure head pipe winder of claim 6, wherein the hollow drive shaft is connected to the transition sleeve by a positioning key, the positioning key is snapped into a key slot on the transition sleeve, the key slot of the hollow drive shaft has a longer stroke than the key slot of the transition sleeve, and the difference in length is adapted to the movement distance of the transition sleeve.

9. The dual-pressure-head tube winding machine according to claim 1, wherein linear guide rails are arranged between the base screw and the lead screw and outside the two lead screws, and the linear guide rails guide and limit the screw nut and the lead screw nut.

10. The dual-ram tube winder of claim 1, wherein the tailstock comprises a tailstock frame, a tailstock body, a morse No. 3 taper sleeve, and a morse No. 3 rotating centre; the tailstock frame is used for being connected with a base screw nut, the tailstock body is installed on the tailstock frame, the Morse 3 taper sleeve is fixedly sleeved in the tailstock body, the tail portion of the Morse 3 rotating center is inserted into the Morse 3 taper sleeve, and the center of the Morse 3 taper sleeve is concentric with a transmission shaft of the spindle assembly.

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