CN117161282A - High-precision thread rolling machine with tail groove cutting function - Google Patents

Abstract

The invention discloses a high-precision thread rolling machine with a tail groove cutting function, which belongs to the field of thread rolling machines and comprises a first thread rolling plate, a second thread rolling plate, a frame, a power device, a clamping device, a supporting device, a guiding device and a rotating piece, wherein the rotating piece is used for enabling the clamping device to have a degree of freedom of rotating around a movable axis; the supporting device is provided with a rotation stopping piece which is used for fixing the clamping device relative to the supporting device; the frame is provided with a driving piece which is used for driving the supporting device to move along the movement dimension; the frame is provided with a cutting wheel; when the screw rod moves to the cutting wheel along the movement dimension, the rotation stopping piece enables the clamping device and the supporting device to be relatively fixed. The screw rod can rotate around an axis which is completely parallel to the two screw plates at one moment and is completely matched with the extending direction of the threads on the two screw plates, so that the screw rod cannot have a circle run-out tolerance when being processed again.

Description

High-precision thread rolling machine with tail groove cutting function

Technical Field

The invention relates to the field of thread rolling machines, in particular to a high-precision thread rolling machine with a tail groove cutting function.

Background

The thread rolling machine is a common tool for machining external threads (such as external threads of bolts or screws) of a threaded piece, when the thread rolling machine is used for machining the external threads of the threaded piece, two thread rolling plates are generally arranged on the thread rolling machine in parallel, then a part or structure to be machined is placed between the two thread rolling plates, the thread rolling machine drives one of the thread rolling plates to do reciprocating motion, the two thread rolling plates are static and movable, and finally thread teeth are rubbed on the part or structure to be machined by utilizing threads on the thread rolling plates to form external threads;

however, because the two plates urge the screw member to rotate, the screw member can deviate, if the screw member is obliquely positioned between the two plates, the screw thread machined on the screw member can possibly have waste parts and also can have errors, in addition, because the screw member is clamped by the two plates, the bottom of the screw member is also provided with one plate for supporting the screw member, but the axis of the screw member is difficult to ensure to be completely parallel to the two screw plates and is completely matched with the extending direction of the screw thread on the two screw plates, so that when the screw member rotates along with the movement of the two screw plates, a circle run-out tolerance can appear, if the machining out of my screw depth is shallower, the circle run-out tolerance has little influence on the machining quality of the screw member, but when the screw depth is very deep and the screw member diameter is very large, the circle run-out tolerance has very great influence on the machining quality of the screw member.

Disclosure of Invention

Aiming at the problems existing in the prior art, the invention aims to provide a high-precision thread rolling machine with a tail groove cutting function, which can realize that a screw rod rotates around an axis which is completely parallel to two thread rolling plates at one moment and is completely matched with the extending directions of threads on the two thread rolling plates, so that a circle run-out tolerance cannot occur when the screw rod is reprocessed.

In order to solve the problems, the invention adopts the following technical scheme.

A high-precision thread rolling machine with a tail groove cutting function comprises a first thread rolling plate, a second thread rolling plate, a rack and a power device, wherein the first thread rolling plate and the second thread rolling plate are arranged in parallel, the rack is used for installing the first thread rolling plate and the second thread rolling plate, and the power device is arranged on the rack and used for driving the first thread rolling plate to move along a movement dimension; the method is characterized in that: the high-precision thread rolling machine further comprises: the clamping device is used for clamping one end of the screw rod, the supporting device is used for installing the clamping device, and the guiding device is used for installing the supporting device and enabling the supporting device to slide along the movement dimension; a rotating piece is arranged between the clamping device and the supporting device and is used for enabling the clamping device to have a degree of freedom of rotating around a movable axis; the clamping device and the screw form a plurality of groups of clamping positions, and the plurality of groups of clamping positions are distributed along the axis of the screw in an array manner; each group of clamping positions is provided with at least two clamping points, and a plurality of clamping points are distributed in a linear array along the axis direction of the screw; the supporting device is provided with a rotation stopping piece which is used for fixing the clamping device relative to the supporting device; the frame is provided with a driving piece which is used for driving the supporting device to move along the movement dimension; the frame is provided with a cutting wheel; when the screw rod moves to the cutting wheel along the movement dimension, the rotation stopping piece enables the clamping device and the supporting device to be relatively fixed.

The screw rod is clamped by the clamping device and can rotate, the screw rod can be positioned by the clamping device, the screw rod can rotate around an axis only when rotating, the axis is the axis of the screw rod, the screw rod can also move when being threaded by the first thread rolling plate, and therefore when the screw rod is threaded, the rotating axis is fixed, circular runout tolerance cannot occur when the screw rod rotates, the precision of threads on the screw rod is higher, the phenomenon that a part of threads are deep and a part of threads are shallow is avoided, the quality of the threads is better guaranteed, in addition, after the first thread rolling plate and the second thread rolling plate are threaded, the clamping device can be fixed by the rotation stopping piece, the clamping device cannot rotate, and then the clamping device drives the screw rod to pass through the cutting wheel, so that tail grooves can be cut.

Further, the clamping device comprises a plurality of clamping arms and a mounting plate for mounting the plurality of clamping arms; a transmission plate is arranged on the clamping arm; the clamping arm is rotationally connected with the mounting plate, and a moving part is arranged in the mounting plate and used for enabling the plurality of transmission plates to be close to or far away from each other; at least two clamping wheels are arranged on the transmission plate; the clamping wheel is used for contacting with the screw; the clamping point is the intersection point of the clamping wheel and the screw rod; the two clamping wheels are distributed in an array along the axis direction of the screw rod.

The screw is clamped in a clamping wheel mode, so that the clamping wheel is in point contact with the screw, then the clamping wheel can rotate, when the screw is clamped, the clamping wheel clamps the screw at different points, the service life of the clamping wheel is better guaranteed, the clamping is carried out through the use of the wheel, and the service life of the clamping device is prolonged.

Further, a first hinging seat is arranged on the transmission plate, and the first hinging seat is fixed relative to the transmission plate; the first hinge seat is rotatably provided with a first hinge block, a rotating shaft is arranged in the first hinge block in a penetrating manner, and the rotating shaft is rotatably connected with the first hinge block; the clamping wheels and the rotating shaft synchronously rotate, and the two clamping wheels are respectively arranged at two end parts of the rotating shaft; the end part of the rotating shaft is provided with a pushing part, and the pushing part is used for enabling the rotating shaft and the first hinging block to rotate around the first hinging seat so as to enable the rotating shaft to have a first rotating position and a second rotating position; when the rotating shaft is positioned at the first rotating position, the clamping wheel at one end of the rotating shaft is contacted with the screw rod, and the clamping wheel at the other end of the rotating shaft is far away from the screw rod; when the rotating shaft is positioned at the second rotating position, the clamping wheel at one end of the rotating shaft is far away from the screw rod, and the clamping wheel at the other end of the rotating shaft is contacted with the screw rod.

When the clamping wheel is used for clamping the screw rod, abrasion occurs, the rotating shaft can be rotated through the pushing part, so that the wheel at one end of the rotating shaft is originally used for clamping, and the rotating shaft is changed into another wheel for clamping after rotating around the first hinge block, so that the function of automatically replacing the clamping wheel is realized.

Further, a first limiting plate and a second limiting plate are arranged at two ends of the rotating shaft; the clamping wheel is positioned between the first limiting plate and the second limiting plate; the first limiting plate is provided with a pressure sensor; an elastic piece is arranged between the pressure sensor and the limiting wheel; the clamping wheel is in sliding connection with the rotating shaft so that the clamping wheel slides along the axis of the rotating shaft.

Because the screw rod can take place to rotate under the effect of first thread rolling board and second thread rolling board, then the screw rod drives the clamping wheel and moves together, the clamping wheel can receive the effort of pivot axial direction, thereby can make the clamping wheel take place the skew, then the clamping wheel is applyed the force and is given the elastic component, thereby can make pressure sensor detect the pressure numerical value, thereby can detect the size of the power that the clamping wheel received, then after the clamping wheel takes place wearing and tearing, frictional force between clamping wheel and the screw rod is insufficient, thereby can lead to the atress of clamping wheel to reduce, the pressure numerical value that pressure sensor detected reduces, at this moment the operating personnel can make the drive unit start change the clamping wheel according to the numerical value.

Further, a controller is arranged in the pushing part; the controller is connected with the pressure sensor in a wired or wireless way so as to perform information interaction with the pressure sensor; the pressure sensor is provided with a preset pressure value; when the pressure detected by the gravity sensor is smaller than a preset pressure value, the pushing part pushes the rotating shaft to rotate.

The pressure value is preset for the pressure sensor, so that the clamping wheel can be automatically replaced after being worn.

Further, the clamping arm includes: the first hinge plate, the second hinge plate, the third hinge plate and the fourth hinge plate; the first hinge plate and the second hinge plate are arranged in parallel; the third hinge plate is hinged with the first hinge plate at a first hinge point, and the third hinge plate is hinged with the second hinge plate at a second hinge point; the fourth hinge plate is hinged with the first hinge plate at a third hinge point, and the fourth hinge plate is hinged with the second hinge plate at a fourth hinge point; the third hinging plate is fixed with the mounting plate; the fourth hinged plate is fixed with the transmission plate; the graph enclosed by the connecting lines of the first hinge point, the second hinge point, the third hinge point and the fourth hinge point is a parallelogram; the moving part includes: a first electric push rod and a lifting plate; the lifting plate is fixed with the output end of the first electric push rod; a connecting rod is arranged at the lifting plate; the plurality of connecting rods are arranged, one end of each connecting rod is hinged with the lifting plate, and the other end of each connecting rod is hinged with the first hinged plate or the second hinged plate; and the connecting line of the first hinge point and the second hinge point is perpendicular to the axis of the screw rod.

The parallel four-bar structure is formed by the first hinge plate, the second hinge plate, the third hinge plate and the fourth hinge plate, so that the fourth hinge plate is always parallel to the mounting plate, then the mounting plate is parallel to the plane of screw rod movement, the fourth hinge plate is parallel to the plane of screw rod movement, the transmission plate is parallel to the axis of the screw rod, the clamping wheel on the transmission plate is parallel to the axis of the screw rod, and therefore when the clamping wheel clamps screws with different diameters, the clamped position of the screw rod is ensured, and circular runout tolerance can not occur during rotation.

Furthermore, two mounting plates are arranged at intervals, a connecting rod is arranged between the two mounting plates, and the connecting rod is used for fixing the two mounting plates together; the rotating member includes: the fixed rod is fixedly connected with the supporting device; the fixed rod is rotationally connected with the mounting plate; the dead lever is located the below of mounting panel at least partially, and the dead lever is located the position of mounting panel below and is equipped with the locating plate, and the locating plate is parallel with the mounting panel, and installs a plurality of universal balls on the locating plate, and universal ball and mounting panel contact.

The universal ball and the fixed rod are connected with the rotation of the mounting plate to double-position the mounting plate, so that the mounting plate is guaranteed not to deviate when rotating, and the quality of the final screw thread rolling is guaranteed.

Further, the driving member includes: the device comprises a driving motor, a driving shaft, a connecting rope and a connecting column; the connecting column is fixed with the supporting device; one end of the connecting rope is fixed with the connecting column, and the other end of the connecting rope is fixed with the driving shaft; when the first thread rolling plate moves along the motion dimension, the driving motor rotates the driving shaft so as to enable the driving shaft to outwards pay out the connecting rope, and the supporting device moves along the motion dimension; when the first thread rolling plate moves reversely, the driving motor drives the driving shaft to rotate, and the supporting device is reset through the connecting rope.

Through the connecting rope, the clamping device can freely move along with the screw plate, namely after the clamping device clamps the screw rod, the movement track of the screw rod, which is originally the screw rod, cannot be influenced, and then the clamping device can be reset.

Further, the guide member includes: a guide rail and a slider; the length direction of the guide rail coincides with the movement dimension; the sliding block is connected with the guide rail in a sliding way; the supporting device is arranged on the sliding block and is in sliding connection with the sliding block; the sliding block is provided with a second electric push rod; when the screw rod moves to the cutting wheel, the second electric push rod pushes the supporting device to move along the movement dimension to approach the cutting wheel.

Further, a lifting moving part is arranged below the guide rail; the lifting moving piece is used for driving the guide rail to move upwards or downwards.

Compared with the prior art, the invention has the advantages that:

1. the screw rod can be completely parallel to the two thread rolling plates at one moment, and the screw rod can be rotated along the axis which is completely matched with the extending direction of the threads on the two thread rolling plates, so that the circle run-out tolerance can not occur when the screw rod is processed again.

2. After the first thread rolling plate and the second thread rolling plate finish thread rolling, the rotation stopping piece can fix the clamping device, the clamping device cannot rotate, and then the clamping device drives the screw rod to pass through the cutting wheel, so that a tail groove can be cut.

3. The clamping wheel clamps the screw rod at different points, so that the service life of the clamping wheel is better guaranteed, namely, the clamping device is improved by using the wheel for clamping.

4. Can follow pivot axis through the centre gripping wheel and slide, the centre gripping wheel is with force application to the elastic component to can make pressure sensor detect the mode of pressure numerical value, can detect the size of the force that the centre gripping wheel received, then take place wearing and tearing the back when the centre gripping wheel, friction force between centre gripping wheel and the screw rod is not enough, thereby can lead to the atress of centre gripping wheel to reduce, the pressure numerical value that pressure sensor detected reduces.

5. The first hinge plate, the second hinge plate, the third hinge plate and the fourth hinge plate form a parallel four-bar structure, so that when screws with different diameters are replaced, the clamping points always keep the screws to be completely parallel to the two screw plates, and the clamping points rotate along the axis which is completely matched with the extending directions of the threads on the two screw plates.

Drawings

FIG. 1 is a schematic overall structure of the present invention;

FIG. 2 is a schematic illustration of the power plant and portions of surrounding parts of the present invention;

FIG. 3 is a schematic view of the structure of the clamping device and part of the surrounding parts of the present invention;

FIG. 4 is a schematic view of a clamping device according to the present invention;

FIG. 5 is a schematic view of the mounting plate and portions of surrounding parts of the present invention;

FIG. 6 is a schematic view of the structure of the ball and part of the surrounding parts of the present invention;

FIG. 7 is a schematic view of the structure of the drive plate and portions of surrounding parts of the present invention;

FIG. 8 is a schematic view of a clamping arm according to the present invention;

FIG. 9 is a schematic view of the structure of the clamping wheel and part of the surrounding parts of the present invention;

FIG. 10 is a schematic view of the cutting wheel and portions of surrounding parts of the present invention;

FIG. 11 is a schematic view of the structure of the slider and part of the surrounding parts of the present invention.

The reference numerals in the figures illustrate:

1. a first screw plate; 2. the second thread rolling plate; 3. a frame; 4. a power device; 41. a stepping motor; 42. a transmission belt; 43. a belt wheel; 44. a first drive shaft; 45. a first gear; 46. a second drive shaft; 47. a first pin; 48. a second pin; 49. a transmission arm; 5. a clamping device; 51. a rotating member; 511. a fixed rod; 512. a positioning plate; 513. a universal ball; 52. a rotation stopper; 53. a clamping arm; 531. a first hinge plate; 532. a second hinge plate; 533. a third hinge plate; 534. a fourth hinge plate; 535. a first hinge point; 536. a second hinge point; 537. a third hinge point; 538. a fourth hinge point; 54. a mounting plate; 55. a drive plate; 56. a movement section; 561. a first electric push rod; 562. a lifting plate; 563. a connecting rod; 57. a clamping wheel; 58. a first hinge base; 581. a first hinge block; 582. a rotating shaft; 583. a first limiting plate; 584. a second limiting plate; 585. an elastic member; 59. a pushing part; 591. a third electric push rod; 592. the second hinge seat; 593. a second hinge block; 6. a support device; 7. a guide device; 71. a guide rail; 72. a slide block; 73. a second electric push rod; 8. a driving member; 81. a driving motor; 82. a drive shaft; 83. a connecting rope; 84. a connecting column; 85. lifting the moving member; 9. a cutting wheel; 91. a rotating rod; 92. a bracket; 93. a servo motor; 94. and a fifth electric push rod.

Detailed Description

Referring to figures 1-11 of the drawings,

a high-precision thread rolling machine with a tail groove cutting function comprises a first thread rolling plate 1, a second thread rolling plate 2, a machine frame 3 and a power device 4, wherein the first thread rolling plate 1 and the second thread rolling plate 2 are arranged in parallel, the machine frame 3 is used for installing the first thread rolling plate 1 and the second thread rolling plate 2, and the power device 4 is arranged on the machine frame 3 and used for driving the first thread rolling plate 1 to move along a motion dimension. The high-precision thread rolling machine further comprises: the clamping device 5, the supporting device 6, the guiding device 7, the rotating piece 51, the rotation stopping piece 52, the driving piece 8 and the cutting wheel 9; the supporting device 6 is a bracket structure; the clamping device 5 is used for clamping one end of the screw; the supporting device 6 is used for installing the clamping device 5; the guide means 7 are used for mounting the support means 6 and for making the support means 6 slidable in the movement dimension. A rotation member 51 is provided between the holding device 5 and the supporting device 6, the rotation member 51 being configured to allow the holding device 5 to have a degree of freedom of rotation about a movable axis, i.e., the holding device 5 is rotatable relative to the supporting device 6; the clamping device 5 and the screw form a plurality of groups of clamping positions, and the plurality of groups of clamping positions are distributed along the axis of the screw in an array manner; each group of clamping positions is provided with at least two clamping points, and a plurality of clamping points are distributed in a linear array along the axis direction of the screw; the rotation stopping piece 52 is installed on the supporting device 6, and the rotation stopping piece 52 is used for fixing the clamping device 5 relative to the supporting device 6; a driving member 8 is arranged on the frame 3, and the driving member 8 is used for driving the supporting device 6 to move along the movement dimension; a cutting wheel 9 is arranged on the frame 3; the rotation stop 52 secures the clamping device 5 relative to the support device 6 when the screw is moved in the movement dimension to the cutting wheel 9.

Specifically, the power unit 4 includes: the stepping motor 41, the driving belt 42, the belt wheel 43, the first driving shaft 44, the first gear 45, the second driving shaft 46, the second gear, the first pin 47, the second pin 48 and the driving arm 49; the drive arm 49 has a plate-like structure; the stepper motor 41 is fixed with the frame 3; the first transmission shaft 44 is rotatably connected with the frame 3; the pulley 43 and the first gear 45 are both fixed with the first transmission shaft 44; the second gear is fixed with the second driving wheel; the first pin 47 is fixed with the second gear; the second pin 48 is fixed with the first thread rolling die 1; one end of the driving arm 49 is hinged to the first pin 47, and the other end is hinged to the second pin 48.

Specifically, the clamping device 5 includes a clamping arm 53, a mounting plate 54, a transmission plate 55, a moving portion 56, and a clamping wheel 57. The number of the clamping arms 53 and the number of the transmission plates 55 are plural, and the number of the clamping arms 53 is the same as the number of the transmission plates 55. The mounting plate 54 is used for mounting the clamping arm 53; a drive plate 55 is mounted on the clamping arm 53; the clamping arms 53 are rotationally connected with the mounting plate 54, the moving part 56 is arranged in the mounting plate 54, and the moving part 56 is used for driving the plurality of clamping arms 53 to rotate so as to enable the plurality of transmission plates 55 to approach or separate; at least two clamping wheels 57 are provided, and in this embodiment, two clamping wheels 57 are preferably provided on the transmission plate 55; the clamping wheel 57 is used for contacting with the outer wall surface of the screw; the clamping point is the intersection point of the clamping wheel 57 and the screw; the two clamping wheels 57 are distributed in an array along the axis of the screw.

More specifically, the clamping device 5 further comprises: the first hinge base 58, the first hinge block 581, the rotation shaft 582, and the pushing portion 59. The pushing portion 59 includes: a third electric push rod 591, a second hinge base 592, and a second hinge block 593. The first hinge seat 58 is arranged at the transmission plate 55, and a fixing plate is arranged between the first hinge seat 58 and the transmission plate 55 and is used for fixing the first hinge seat 58 relative to the transmission plate 55; the first hinge block 581 is hinged with the first hinge seat 58, the rotating shaft 582 penetrates through the first hinge block 581 and the rotating shaft 582 is rotatably connected with the first hinge block 581; the first hinge block 581 is located in the middle of the rotation shaft 582. The clamping wheels 57 rotate synchronously with the rotating shaft 582, and the two clamping wheels 57 are respectively arranged at two end parts of the rotating shaft 582; the second hinge block 593 is located at an end portion of the rotating shaft 582, and the second hinge block 593 is rotatably connected with the rotating shaft 582, the rotating shaft 582 can rotate in the second hinge block 593, the third electric push rod 591 is fixedly mounted on the transmission plate 55, the second hinge base 592 is fixedly mounted on an output end of the third electric push rod 591, and the second hinge block 593 is hinged with the second hinge base 592. The third electric push rod 591 moves up or down to rotate the rotation shaft 582 and the first hinge block 581 around the first hinge base 58, so that the rotation shaft 582 has a first rotation position and a second rotation position; when the rotating shaft 582 is positioned at the first rotating position, the clamping wheel 57 at one end of the rotating shaft 582 is contacted with the screw, and the clamping wheel 57 at the other end is far away from the screw; when the rotation shaft 582 is at the second rotation position, the holding wheel 57 at one end of the rotation shaft 582 is away from the screw, and the holding wheel 57 at the other end contacts the screw. Precisely, the clamping wheel 57 in contact with the screw differs between when the spindle 582 is in the first rotational position and when the spindle 582 is in the second rotational position.

More specifically, a sliding key is fixedly installed on the rotating shaft 582, a sliding groove is formed in the clamping wheel 57, and the sliding key is in sliding connection with the sliding groove, so that the clamping wheel 57 can synchronously rotate along with the rotating shaft 582, and the clamping wheel 57 can slide along the axis of the rotating shaft 582. The holding device 5 further comprises: a first limiting plate 583, a second limiting plate 584, and an elastic member 585; the elastic member 585 is preferably a spring in the present embodiment; the first limiting plate 583 and the second limiting plate 584 are provided with two groups and are respectively positioned at two ends of the rotating shaft 582; specifically, one set of the first limiting plate 583 and the second limiting plate 584 is located at one end of the rotating shaft 582, and the other set of the first limiting plate 583 and the second limiting plate 584 is located at the other end of the rotating shaft 582. The clamping wheel 57 is located between the first limiting plate 583 and the second limiting plate 584; a pressure sensor is arranged on the first limiting plate 583; an elastic piece 585 is arranged between the pressure sensor and the limiting wheel; the clamping wheel 57 is slidably coupled to the shaft 582 such that the clamping wheel 57 slides along the axis of the shaft 582, thereby compressing the elastic member 585 and causing the pressure sensor to detect a pressure value.

More specifically, the pushing portion 59 has a controller provided therein; the controller is connected with the pressure sensor in a wired or wireless way so as to perform information interaction with the pressure sensor; the pressure sensor is provided with a preset pressure value; when the pressure detected by the gravity sensor is smaller than a preset pressure value, the pushing portion 59 pushes the rotation shaft 582 to rotate. Precisely, when the clamping wheel 57 clamps the screw rod and the first screw plate 1 and the second screw plate 2 carry out screw thread rolling operation on the screw rod, the screw rod rotates to enable the clamping wheel 57 to rotate, so that the clamping wheel 57 receives acting force rotating around the axis of the screw rod, the clamping wheel 57 moves along the axial direction of the rotating shaft 582, and the pressure sensor detects a numerical value; when the value detected by the pressure sensor is smaller than the preset pressure value, which indicates that the clamping wheel 57 is worn, the friction force between the clamping wheel 57 and the screw is reduced, and when the screw rotates, the force in the axial direction of the rotating shaft 582 received by the clamping wheel 57 is reduced, so that the compression stroke of the elastic member 585 is reduced, and further, the phenomenon that the value detected by the pressure sensor is smaller than the preset pressure value occurs, and at this time, the pushing part 59 rotates the rotating shaft 582 around the first hinge block 581. The clamping wheel 57 is replaced to be in contact with the screw rod, so that automatic detection and automatic replacement can be realized when the clamping wheel 57 is worn, the stability in the running process is improved, and the circle runout tolerance of the screw rod in rotation is reduced better.

Specifically, the clamping arm 53 includes: a first hinge plate 531, a second hinge plate 532, a third hinge plate 533, and a fourth hinge plate 534; the first hinge plate 531 and the second hinge plate 532 are disposed in parallel; the third hinge plate 533 is hinged to the first hinge point 535 with the first hinge plate 531, and the third hinge plate 533 is hinged to the second hinge point 536 with the second hinge plate 532; the fourth hinge plate 534 is hinged to the first hinge plate 531 at a third hinge point 537, and the fourth hinge plate 534 is hinged to the second hinge plate 532 at a fourth hinge point 538; the third hinge plate 533 is fixed to the mounting plate 54; the fourth hinge plate 534 is fixed to the transmission plate 55; wherein the graph enclosed by the lines of the first hinge point 535, the second hinge point 536, the third hinge point 537 and the fourth hinge point 538 is a parallelogram; the moving part 56 includes: a first electric push rod 561 and a lifting plate 562; the lifting plate 562 is fixed with the output end of the first electric push rod 561; a connecting rod 563 is arranged at the lifting plate 562; the plurality of connecting rods 563 are provided, one end of each connecting rod 563 is hinged with the lifting plate 562, and the other end is hinged with the first hinge plate 531 or the second hinge plate 532; the line connecting the first hinge point 535 and the second hinge point 536 is perpendicular to the axis of the screw. The first hinge plate 531, the second hinge plate 532, the third hinge plate 533 and the fourth hinge plate 534 form a parallel four-bar structure, so that the fourth hinge plate 534 is always parallel to the mounting plate 54, then the mounting plate 54 is parallel to the moving plane of the screw rod, the fourth hinge plate 534 is parallel to the moving plane of the screw rod, the transmission plate 55 is parallel to the axis of the screw rod, the clamping wheel 57 on the transmission plate 55 is parallel to the axis of the screw rod, and when the clamping wheel 57 clamps screws with different diameters, the clamped position of the screw rod is ensured, and circular runout tolerance cannot occur during rotation.

Specifically, two mounting plates 54 are provided, the two mounting plates 54 are arranged at intervals, a connecting rod is arranged between the two mounting plates 54, and the connecting rod is used for fixing the two mounting plates 54 together; the rotating member 51 includes: the fixed rod 511, the fixed rod 511 is fixedly connected with the supporting device 6; the fixed rod 511 is rotatably connected with the mounting plate 54; the fixing rod 511 is at least partially located below the mounting plate 54, and a positioning plate 512 is disposed at a position of the fixing rod 511 below the mounting plate 54, the positioning plate 512 is parallel to the mounting plate 54, and a plurality of universal balls 513 are mounted on the positioning plate 512, and the universal balls 513 are in contact with the mounting plate 54.

Specifically, the driving member 8 includes: a driving motor 81, a driving shaft 82, a connection rope 83, and a connection post 84; the connecting column 84 is fixed with the supporting device 6; one end of the connecting rope 83 is fixed with the connecting column 84, and the other end of the connecting rope 83 is fixed with the driving shaft 82; when the first screw plate 1 moves along the motion dimension, the driving motor 81 rotates the driving shaft 82, so that the driving shaft 82 outwards releases the connecting rope 83, and the supporting device 6 moves along the motion dimension; when the first screw plate 1 moves in the reverse direction, the driving motor 81 rotates the driving shaft 82, and the supporting device 6 is reset by the connecting rope 83.

Specifically, the guide member includes: a guide rail 71 and a slider 72; the length direction of the guide rail 71 coincides with the movement dimension; the slide block 72 is slidably connected with the guide rail 71; the supporting device 6 is arranged on the sliding block 72, and the supporting device 6 is connected with the sliding block 72 in a sliding way; the second electric push rod 73 is arranged on the slide block 72; when the screw is moved to the cutting wheel 9, the second electric push rod 73 pushes the support device 6 to move along the movement dimension close to the cutting wheel 9.

Specifically, a lifting moving member 85 is disposed below the guide rail 71; the lifting and lowering member 85 is used to drive the guide rail 71 to move up or down. The lifting moving member 85 is a fourth electric push rod, and the fourth electric push rod drives the guide rail 71 to move up or down.

Specifically, the cutting wheel 9 is fixedly provided with a rotating rod 91, a support 92 is arranged at the position of the rotating rod 91, the rotating rod 91 is rotationally connected with the support 92, a servo motor 93 is arranged on the support 92, the servo motor 93 is fixedly arranged on the support 92, the output end of the servo motor 93 is fixedly arranged with the rotating rod 91, and the servo motor 93 is used for driving the rotating rod 91 to rotate, so that the cutting wheel 9 rotates at a high speed. The fifth electric push rod 94 is installed on the frame 3, the fifth electric push rod 94 is connected with the bracket 92, and the fifth electric push rod 94 is used for driving the bracket 92 to move up or down, so that the cutting wheel 9 can move up or down.

The specific working flow is as follows:

when the screw reaches between the first screw plate 1 and the second screw plate 2, the clamping device 5 clamps the screw, that is, the first electric push rod 561 drives the lifting plate 562 to lift, then the lifting plate 562 drives the connecting rod 563 to move, the connecting rod 563 pulls the first hinge plate 531, the first hinge plate 531 moves, the first hinge plate 531, the second hinge plate 532, the third hinge plate 533 and the fourth hinge plate 534 form a parallel screw rod mechanism, so that the fourth hinge plate 534 always moves along with the first hinge plate 531, the third hinge plate 533 is parallel to the third hinge plate 533, the third hinge plate 533 is perpendicular to the screw axis, so that the fourth hinge plate 534 is also perpendicular to the screw axis, then the transmission plate 55 is connected with the fourth hinge plate 534, specifically, the transmission plate 55 is perpendicular to the fourth hinge plate 534, and then the transmission plate 55 is parallel to the screw axis, so that when the clamping wheel 57 clamps the screw, the position of the screw axis can be better ensured.

The screw then rotates and the clamping means 5 will rotate together, but in the process the axis of the screw has been defined, and the screw will then be moved by the first and second screw plates 1, 2, while the circular runout tolerance is reduced or avoided, and the clamping means 5 and the supporting means 6 will then move together and will thus always co-operate with the screw.

After the clamping wheel 57 is worn, the pushing part 59 pushes the rotating shaft 582 to rotate around the first hinge block 581, so that the other clamping wheel 57 can be replaced by being in contact with the screw rod to clamp the screw rod.

After the screw thread rolling is completed, the rotation stopping piece 52 enables the clamping device 5 to be unable to rotate, so that the screw cannot rotate, and then the cutting wheel 9 moves upwards to cut a tail groove of the screw; the second electric push rod 73 can push the clamping device 5 to move, so that the clamping device 5 moves relative to the sliding block 72, and the position of the clamping device 5 can be finely adjusted, so that the screw is positioned above the cutting wheel 9.

Claims (10)

1. The high-precision thread rolling machine with the function of cutting the tail groove comprises a first thread rolling plate (1) and a second thread rolling plate (2) which are arranged in parallel, a frame (3) for mounting the first thread rolling plate (1) and the second thread rolling plate (2) and a power device (4) which is arranged on the frame (3) and used for driving the first thread rolling plate (1) to move along a movement dimension; the method is characterized in that: the high-precision thread rolling machine further comprises: a clamping device (5) for clamping one end of the screw, a supporting device (6) for installing the clamping device (5), and a guiding device (7) for installing the supporting device (6) and enabling the supporting device (6) to slide along a movement dimension; a rotating piece (51) is arranged between the clamping device (5) and the supporting device (6), and the rotating piece (51) is used for enabling the clamping device (5) to have a degree of freedom of rotating around a movable axis; the clamping device (5) and the screw form a plurality of groups of clamping positions, and the plurality of groups of clamping positions are distributed along the axis of the screw in an array manner; each group of clamping positions is provided with at least two clamping points, and a plurality of clamping points are distributed in a linear array along the axis direction of the screw; the supporting device (6) is provided with a rotation stopping piece (52), and the rotation stopping piece (52) is used for fixing the clamping device (5) relative to the supporting device (6); a driving piece (8) is arranged on the frame (3), and the driving piece (8) is used for driving the supporting device (6) to move along the movement dimension; a cutting wheel (9) is arranged on the frame (3); when the screw moves to the cutting wheel (9) along the movement dimension, the rotation stopping piece (52) enables the clamping device (5) and the supporting device (6) to be relatively fixed.

2. The high-precision thread rolling machine with a function of cutting a tail groove according to claim 1, wherein: the clamping device (5) comprises a plurality of clamping arms (53) and a mounting plate (54) for mounting the plurality of clamping arms (53); a transmission plate (55) is arranged on the clamping arm (53); the clamping arm (53) is rotationally connected with the mounting plate (54), a moving part (56) is arranged in the mounting plate (54), and the moving part (56) is used for enabling the plurality of transmission plates (55) to be close to or far from each other; at least two clamping wheels (57) are arranged on the transmission plate (55); the clamping wheel (57) is used for contacting with a screw; the clamping point is the intersection point of the clamping wheel (57) and the screw rod; the two clamping wheels (57) are distributed in an array along the axis direction of the screw.

3. The high-precision thread rolling machine with a function of cutting a tail groove according to claim 2, characterized in that: the transmission plate (55) is provided with a first hinging seat (58), and the first hinging seat (58) is fixed relative to the transmission plate (55); a first hinging block (581) is rotatably arranged on the first hinging seat (58), a rotating shaft (582) is arranged in the first hinging block (581) in a penetrating mode, and the rotating shaft (582) is rotatably connected with the first hinging block (581); the clamping wheels (57) and the rotating shaft (582) synchronously rotate, and the two clamping wheels (57) are respectively arranged at two end parts of the rotating shaft (582); the end part of the rotating shaft (582) is provided with a pushing part (59), and the pushing part (59) is used for enabling the rotating shaft (582) and the first hinging block (581) to rotate around the first hinging seat (58) so as to enable the rotating shaft (582) to have a first rotating position and a second rotating position; when the rotating shaft (582) is positioned at the first rotating position, the clamping wheel (57) at one end of the rotating shaft (582) is contacted with the screw, and the clamping wheel (57) at the other end is far away from the screw; when the rotating shaft (582) is positioned at the second rotating position, the clamping wheel (57) at one end of the rotating shaft (582) is far away from the screw, and the clamping wheel (57) at the other end of the rotating shaft is contacted with the screw.

4. A high-precision thread rolling machine with a function of cutting a tail groove as claimed in claim 3, wherein: both ends of the rotating shaft (582) are provided with a first limiting plate (583) and a second limiting plate (584); the clamping wheel (57) is positioned between the first limiting plate (583) and the second limiting plate (584); a pressure sensor is arranged on the first limiting plate (583); an elastic piece (585) is arranged between the pressure sensor and the limiting wheel; the clamping wheel (57) is slidably connected to the rotating shaft (582) such that the clamping wheel (57) slides along the axis of the rotating shaft (582).

5. The high-precision thread rolling machine with a function of cutting a tail groove according to claim 4, wherein: a controller is arranged in the pushing part (59); the controller is connected with the pressure sensor in a wired or wireless way so as to perform information interaction with the pressure sensor; the pressure sensor is provided with a preset pressure value; when the pressure detected by the gravity sensor is smaller than a preset pressure value, the pushing part (59) pushes the rotating shaft (582) to rotate.

6. A high-precision thread rolling machine with a function of cutting a tail groove as claimed in claim 3, wherein: the clamp arm (53) comprises: a first hinge plate (531), a second hinge plate (532), a third hinge plate (533), and a fourth hinge plate (534); the first hinge plate (531) and the second hinge plate (532) are arranged in parallel; the third hinge plate (533) is hinged with the first hinge plate (531) at a first hinge point (535), and the third hinge plate (533) is hinged with the second hinge plate (532) at a second hinge point (536); the fourth hinge plate (534) is hinged with the first hinge plate (531) at a third hinge point (537), and the fourth hinge plate (534) is hinged with the second hinge plate (532) at a fourth hinge point (538); the third hinging plate (533) is fixed with the mounting plate (54); the fourth hinged plate (534) is fixed with the transmission plate (55); wherein the graph enclosed by the connecting lines of the first hinge point (535), the second hinge point (536), the third hinge point (537) and the fourth hinge point (538) is a parallelogram; the moving part (56) includes: a first electric push rod (561) and a lifting plate (562); the lifting plate (562) is fixed with the output end of the first electric push rod (561); a connecting rod (563) is arranged at the lifting plate (562); the connecting rods (563) are provided with a plurality of connecting rods, one end of each connecting rod (563) is hinged with the lifting plate (562), and the other end of each connecting rod is hinged with the first hinge plate (531) or the second hinge plate (532); the line connecting the first hinge point (535) and the second hinge point (536) is perpendicular to the axis of the screw.

7. The high-precision thread rolling machine with a function of cutting a tail groove according to claim 6, wherein: the two mounting plates (54) are arranged at intervals, a connecting rod is arranged between the two mounting plates (54), and the connecting rod is used for fixing the two mounting plates (54) together; the rotating member (51) includes: the fixing rod (511), the fixing rod (511) is fixedly connected with the supporting device (6); the fixed rod (511) is rotationally connected with the mounting plate (54); the fixed rod (511) is at least partially located below the mounting plate (54), a positioning plate (512) is arranged at the position, located below the mounting plate (54), of the fixed rod (511), the positioning plate (512) is parallel to the mounting plate (54), a plurality of universal balls (513) are mounted on the positioning plate (512), and the universal balls (513) are in contact with the mounting plate (54).

8. The high-precision thread rolling machine with a function of cutting a tail groove according to claim 1, wherein: the driving member (8) comprises: a driving motor (81), a driving shaft (82), a connecting rope (83) and a connecting column (84); the connecting column (84) is fixed with the supporting device (6); one end of the connecting rope (83) is fixed with the connecting column (84), and the other end of the connecting rope (83) is fixed with the driving shaft (82); when the first screw plate (1) moves along the motion dimension, the driving motor (81) rotates the driving shaft (82) so that the driving shaft (82) outwards releases the connecting rope (83) and the supporting device (6) moves along the motion dimension; when the first screw plate (1) moves reversely, the driving motor (81) rotates the driving shaft (82), and the supporting device (6) is reset through the connecting rope (83).

9. The high-precision thread rolling machine with a function of cutting a tail groove according to claim 8, wherein: the guide comprises: a guide rail (71) and a slider (72); the length direction of the guide rail (71) coincides with the movement dimension; the sliding block (72) is in sliding connection with the guide rail (71); the supporting device (6) is arranged on the sliding block (72), and the supporting device (6) is in sliding connection with the sliding block (72); a second electric push rod (73) is arranged on the slide block (72); when the screw rod moves to the position of the cutting wheel (9), the second electric push rod (73) pushes the supporting device (6) to move along the movement dimension and close to the cutting wheel (9).

10. The high-precision thread rolling machine with a function of cutting a tail groove according to claim 1, wherein: a lifting moving part (85) is arranged below the guide rail (71); the lifting moving piece (85) is used for driving the guide rail (71) to move upwards or downwards.