CN208067747U - A kind of reinforcing bar mantle fiber polishing all-in-one machine - Google Patents

Abstract

The utility model provides a kind of reinforcing bar mantle fiber polishing all-in-one machine, belongs to construction engineering technical field, and structure includes lathe, mantle fiber mechanism and workpiece polishing mechanism, and the horizontal accumbency of mantle fiber main body of mantle fiber mechanism is configured with mantle fiber main body propeller on lathe upper surface, lathe；The polishing advance and retreat rail gantry of workpiece polishing mechanism is fixedly installed on the lathe of the periphery of mantle fiber advance and retreat rail gantry horizontal direction, polishing resupination framework has overturning degree of freedom by overturning the opposite polishing rollover stand stabilizer blade of hinged shaft；Fixed configurations have electric angle grinder at crossbearer center, and hinged shaft is overturn at two and is configured with same levelling device, two sliding blocks configuration connection horizontally moving device jointly, horizontally moving device is fixedly arranged on lathe upper surface；Horizontally moving device provides horizontal moving back and forth for polishing resupination framework, and cooperates with the flip angle of levelling device adjusting polishing resupination framework.It realizes reinforcing bar mantle fiber and the purpose completed together of polishing, improves worker's effect, reduce mantle fiber common quality problem.

Description

An all-in-one machine for steel bar threading and grinding

technical field

The utility model relates to the technical field of construction engineering, in particular to an all-in-one machine for grinding steel bar casings.

Background technique

Generally, the threading and grinding operations of steel bars in construction projects are mainly performed by two people separately. The threading of steel bars is performed first, and then the grinding operation is carried out. Carry out at the same time; 2. Two processes, two people work, and there are omissions in the polishing operation; 3. Two processes, two people work, which increases the difficulty of management and coordination; 4. There is useless work that reduces efficacy (secondary handling, etc.); 5. The quality of threading and grinding operations cannot be guaranteed.

Contents of the invention

The technical task of the utility model is to solve the deficiencies of the prior art, and provide a machine with simple structure and reasonable design, which can operate the threading and steel bar end parts grinding together, so as to realize the integrated operation of threading and grinding, and improve the efficiency of workers. Efficacy, reducing the common quality problems of threading.

The technical scheme of the utility model is realized in the following manner. The steel bar threading and grinding integrated machine has a structure including a machine tool, a threading mechanism and a polishing mechanism,

The threading body of the threading mechanism lies horizontally on the upper surface of the machine tool. The bottom of the threading body is fixedly connected with a threading frame, and the legs of the threading frame are set as threading rail rings.

The upper surface of the machine tool is fixedly connected with a threaded advance and retreat rail frame. The threaded advance and retreat rail frame is equipped with a threaded parallel advance and retreat double track. on the rack;

The threading rail rings at the feet of the threading frame are respectively threaded on the rod body of the threading advance and retreat smooth straight rail rod, and connected with the threading advance and retreat smooth straight rail sliding sleeve type linear sliding connection to form a threading slide rail sliding mechanism ;

The threading advance and retreat rail frame is equipped with a threading advance and retreat terminal limit stopper, which limits the linear sliding range of the threading rail ring sleeve on the threading advance and retreat smooth straight rail rod;

Threading track ring sleeve, threading frame and threading main body are fixedly connected as an integral threading mechanism;

The two sets of thread advance and retreat smooth straight rails are respectively parallel to the central axis of the thread set main body;

The front threading working end of the threading body faces the steel bar fastening table, which is fixedly arranged on the machine tool; the steel bar straight body is fastened by fastening pliers on the steel bar fastening table, and the steel bar straight body to be threaded section faces the sleeve The main body of the wire is a straight steel bar and is arranged on the same central axis as the main body of the thread;

The machine tool is equipped with threading main thruster;

A grinding advance and retreat rail frame with a grinding mechanism is fixed on the peripheral machine tool in the horizontal direction of the wire thread advance and retreat rail frame. The grinding advance and retreat rail frame is equipped with a grinding parallel advance and retreat double rail. The pole is fixed on the grinding advance and retreat rail frame;

The two polished straight rails and the two threaded smooth straight rails are parallel to each other;

Sliders are respectively arranged on the body of the two parallel polished smooth straight rail rods, and the two sliders are respectively fixedly connected with the feet of the grinding turning frame. frame,

The grinding and turning frame is fixedly connected by the horizontal frame and the vertical frame fixedly connected at both ends of the horizontal frame. The horizontal frame is fixed on the top of the two vertical frames. Arrangement and the bottom end of the vertical frame is hinged on the top of the grinding flip frame leg through the flip hinge; the horizontal frame and the two vertical frames are in the same plane; the two flip hinges are on the same central axis;

The grinding and turning frame has a turning degree of freedom relative to the feet of the grinding turning frame through the turning hinge shaft;

An electric angle grinder is fixed at the center of the horizontal frame.

The two turning hinges are equipped with the same leveling device. The leveling device can adjust the turning angle of the grinding turning frame in real time. The ends of the sleeves are horizontally opposite;

The two sliders are connected to the horizontal moving device, which is fixed on the upper surface of the machine tool; the horizontal moving device provides horizontal forward and backward movements for the grinding and turning frame, and cooperates with the leveling device to adjust the turning angle of the grinding and turning frame, so that the grinding and turning frame will be electrically powered The position of the angle grinder is at the level relative to the wire end of the steel bar, and the electric angle grinder is fed and withdrawn in the horizontal direction, and the end angle grinding is performed on the end of the wire end of the steel bar.

The main body of threading is composed of body, motor, reduction box, pipe chuck, die head, cutter frame, feeding device and cooling system.

The leveling device adopts the angle rotation motor, the angle rotation motor is connected with two turning hinge shafts, the angle rotation motor controls the turning angle of the turning hinge shaft, and has two working states: the first working state is the turning of the turning hinge shaft so that the grinding turning frame is upward Tilt up, so that the electric angle grinder does not participate in the work for the steel bar; the second working state is the flipping of the turning hinge shaft, so that the grinding and turning frame will fall and turn over and the grinding turning frame will be locked in a horizontal position, so that the electric angle grinder is opposite to the steel bar. Grind the threaded end of the steel bar in a horizontal position.

The horizontal moving device adopts the corresponding translation racks fixedly connected to the bottom ends of the two sliders, and each translation rack is parallel to the grinding and retreating smooth straight rail corresponding to the slider;

On the bottom side of the two translational racks, there are meshing teeth arranged along the length span direction of each polished straight rail rod, and the teeth of the meshing teeth face downward;

The machine tool is fixedly equipped with two translation shaft seats, and a translation through shaft is erected between the two translation shaft seats. Two translation gears are fixedly connected to the shaft body of the translation through shaft, and the two translation gears are respectively meshed with two translation racks. The operating end of the translation through shaft extends and protrudes out of the edge of the machine tool and is fixedly connected with a translation operation handwheel;

The positive and negative rotation of the translation operation hand wheel drives the translation rack and the slider to move forward and backward along the direction of the smooth straight rail bar for grinding and advancing and retreating, and makes the grinding and flipping frame move forward and backward horizontally.

The main pusher of threading is fixedly connected to the corresponding advancing racks at the bottom ends of the two threading rail rings, and each advancing rack is parallel to the threading advance and retreat smooth straight rail rod corresponding to the threading rail ring;

On the bottom side of the two propulsion racks, there are meshing teeth arranged along the length span direction of the smooth straight rail rod where the thread is advanced and retreated, and the teeth of the meshing teeth face downward;

The machine tool is fixedly equipped with two propulsion shaft seats, and a propulsion through shaft is erected between the two propulsion shaft seats. Two propulsion gears are fixedly connected to the shaft body of the propulsion through shaft, and the two propulsion gears mesh with two propulsion racks respectively. The operating end of the propulsion through shaft extends and protrudes out of the edge of the machine tool and is fixedly connected with a propulsion operation handwheel;

The positive and negative rotation of the propulsion operation handwheel drives the propulsion rack and the threading rail ring to advance and retreat along the direction of the threading advance and retreat smooth straight rail rod, and makes the threading main body move forward and backward horizontally.

Compared with the prior art, the utility model has the following beneficial effects:

The all-in-one machine for wire threading and grinding of steel bars uses the machine tool to integrate the threading mechanism and the grinding mechanism to form an integrated machine tool, which realizes the grinding of the end of the steel bar after threading the steel bar, and the steel bar is always in a fixed state on the machine tool without exiting the steel bar , Two steps of threading and grinding can be completed in one processing, which is fast and convenient, saves time and effort, and avoids waste of manpower, material resources and time caused by secondary handling.

The all-in-one machine for steel wire threading and grinding uses a parallel track feeding method, which is controllable in advance and retreat, precise in processing, and guaranteed in processing quality.

The all-in-one machine for threading and grinding of steel bars realizes the purpose of completing threading and grinding of steel bars at the same time, improves the efficiency of workers, and reduces common quality problems of threading.

The all-in-one steel bar threading and grinding machine is reasonable in design, simple in structure, safe and reliable, convenient to use and easy to maintain, and has good promotion and use value.

Description of drawings

Accompanying drawing 1 is the main view structural representation of the utility model;

Accompanying drawing 2 is the top view structural representation of the utility model;

Accompanying drawing 3 is the rear view structural representation of the utility model;

Accompanying drawing 4 is the left view structural representation of the utility model;

Accompanying drawing 5 is the right view structural representation of the utility model;

Accompanying drawing 6 is the top view structure diagram of the threading mechanism of the present utility model;

Accompanying drawing 7 is the front structural schematic diagram of threading mechanism of the present utility model;

Accompanying drawing 8 is the top view structure diagram of the polishing mechanism of the present utility model;

Accompanying drawing 9 is the schematic structural view of the first working state of the grinding mechanism of the present invention;

Accompanying drawing 10 is the structural schematic diagram of the grinding mechanism of the present invention in the main view of the second working state;

Accompanying drawing 11 is the structural schematic view of the unpolished state of the main view of the utility model;

Accompanying drawing 12 is the structural schematic view of the main view of the grinding state of the utility model.

The marks in the accompanying drawings indicate respectively:

1. Machine tool, 2. Threading mechanism, 3. Grinding mechanism,

4. Thread threading main body, 5. Thread threading frame, 6. Feet, 7. Thread threading rail ring sleeve, 8. Thread threading advance and retreat rail frame, 9. Thread threading parallel advance and retreat double tracks, 10. Thread thread advance and retreat smooth straight rail Rod, 11, threading advance and retreat terminal limit stopper, 12, front threading working end, 13, steel bar fastening platform, 14, threading main body propeller,

15. Grinding the advancing and retreating rail frame, 16. Grinding the parallel advancing and retreating double rails, 17. Grinding the advancing and retreating smooth straight rail rod, 18. Sliders, 19. Grinding the feet of the overturning frame, 20. Grinding the overturning frame,

21, horizontal frame, 22, vertical frame, 23, turning hinge shaft,

24. Electric angle grinder,

25. Leveling device,

26. Horizontal moving device,

27. Angle rotation motor,

28, translation rack, 29, translation shaft seat, 30, translation through shaft, 31, translation gear, 32, translation operation handwheel,

33, advance rack, 34, advance shaft seat, 35, advance through shaft, 36, advance gear, 37, advance operation handwheel.

Detailed ways

Below in conjunction with accompanying drawing, a kind of steel bar thread grinding integrated machine of the present utility model is described in detail below.

As shown in the accompanying drawings, a kind of steel bar threading and grinding integrated machine of the present utility model has a structure including a machine tool 1, a threading mechanism 2 and a grinding mechanism 3,

The threading main body 4 of the threading mechanism 2 lies horizontally on the upper surface of the machine tool. The bottom of the threading main body 4 is fixedly connected with a threading frame 5 , and the legs 6 of the threading frame 5 are set as threading rail rings 7 .

The upper surface of the machine tool 1 is fixedly connected with a threaded advance and retreat rail frame 8, and the threaded advance and retreat rail frame 8 is equipped with a threaded parallel advance and retreat double track 9, and the threaded parallel advance and retreat double track 9 adopts two parallel threaded advance and retreat smooth straight rail rods 10 The fixed erection is set on the thread advance and retreat rail frame 8;

The threading rail ring sleeves 7 at the feet of the threading frame are respectively threaded on the shaft body of the threading advance and retreat smooth straight rail rod 10, and are connected with the threading advance and retreat smooth straight rail rod sliding sleeve type linear sliding to form a threading slide rail sliding mechanism;

The wire thread advancing and retreating rail frame is equipped with a threading advancing and retreating terminal limit stop 11, which limits the linear sliding range of the threading rail ring sleeve on the threading advancing and retreating smooth straight rail rod;

Threading track ring sleeve, threading frame and threading main body are fixedly connected as an integral threading mechanism;

The two sets of thread advance and retreat smooth straight rails are respectively parallel to the central axis of the thread set main body;

The front threading working end 12 of the threading main body faces the steel bar fastening table 13, and the steel bar fastening table 13 is fixedly arranged on the machine tool 1; The threading section faces the threading main body, and the steel bar is straight and arranged on the same central axis as the threading main body;

The machine tool 1 is equipped with a threading main body propeller 14;

The grinding advance and retreat rail frame 15 of the grinding mechanism 3 is fixedly arranged on the machine tool 1 on the periphery of the wire thread advancing and retreating rail frame in the horizontal direction. Advance and retreat smooth straight rail bar 17 is fixed on the grinding advance and retreat rail frame 15;

The two polished straight rails and the two threaded smooth straight rails are parallel to each other;

Sliders 18 are respectively configured on the shafts of two parallel grinding forward and backward smooth straight rail bars 17, and the two sliders are respectively fixedly connected with grinding turning frame legs 19, and the tops of the two grinding turning frame legs on the same horizontal plane are hinged. There are sanding flip frames 20,

The grinding flip frame 20 is fixedly connected by a horizontal frame 21 and a vertical frame 22 fixedly connected at both ends of the horizontal frame. The vertical frames are vertically arranged respectively and the bottom ends of the vertical frames are hinged on the top of the grinding flip frame legs through the flipping hinge shaft 23; the horizontal frame and the two vertical frames are in the same plane; the two flipping hinge shafts are on the same central axis;

The grinding and turning frame 20 has a turning degree of freedom relative to the grinding and turning frame feet through the turning hinge shaft 23;

An electric angle grinder 24 is fixedly arranged at the center of the horizontal frame 21,

The same leveling device 25 is jointly configured with the two turning hinges, and the leveling device can adjust the turning angle of the grinding and turning frame in real time, and first adjust the grinding and turning frame to a horizontal position when the electric angle grinder is working, so that the electric angle grinder and the The wire ends of the steel bar are opposite to each other horizontally;

The two sliders are configured to connect to the horizontal moving device 26, and the horizontal moving device is fixedly arranged on the upper surface of the machine tool; the horizontal moving device provides horizontal advance and retreat movements for the grinding flip frame, and cooperates with the leveling device to adjust the flip angle of the grinding flip frame, so that the grinding flip frame will The position of the electric angle grinder is at the level relative to the wire end of the steel bar, and the electric angle grinder is fed and withdrawn in the horizontal direction, and the end angle grinding is performed on the end of the wire end of the steel bar.

The main body of threading is composed of body, motor, reduction box, pipe chuck, die head, cutter frame, feeding device and cooling system.

The leveling device adopts an angle rotation motor 27, and the angle rotation motor 27 connects two turning hinge shafts 23 in total. The angle rotation motor controls the turning angle of the turning hinge shaft and has two working states respectively: the first working state is that the turning over of the turning hinge shaft makes grinding The overturning frame is tilted upwards, so that the electric angle grinder does not participate in the work on the steel bar; the second working state is the overturning of the overturning hinge shaft, so that the grinding and overturning frame falls and turns over and the grinding and overturning frame is locked in a horizontal position, so that the electric angle grinder is in the horizontal position. The relative horizontal position of the steel bar is used to grind the threaded end of the steel bar.

The horizontal moving device 26 adopts the corresponding translation racks 28 respectively fixedly connected to the bottom ends of the two sliders, and each translation rack is parallel to the grinding and retreating smooth straight rail rods corresponding to the sliders;

On the bottom side of the two translational racks, there are meshing teeth arranged along the length span direction of each polished straight rail rod, and the teeth of the meshing teeth face downward;

Two translation shaft seats 29 are fixedly arranged on the machine tool, and a translation through shaft 30 is erected between the two translation shaft seats. Two translation gears 31 are fixedly connected to the shaft body of the translation through shaft respectively, and the two translation gears mesh with two translation gears respectively. The rack, the operating end of the translational through-axis extends and protrudes out of the edge of the machine tool and is fixedly connected with a translational operation handwheel 32;

The positive and negative rotation of the translation operation hand wheel drives the translation rack and the slider to move forward and backward along the direction of the smooth straight rail bar for grinding and advancing and retreating, and makes the grinding and flipping frame move forward and backward horizontally.

The threading main body propeller 14 adopts the bottom ends of two threading rail rings to be respectively fixedly connected to the corresponding advancing racks 33, and each advancing rack is connected to the threading advance and retreat smooth straight rail bar corresponding to the threading rail rings. parallel;

On the bottom side of the two propulsion racks, there are meshing teeth arranged along the length span direction of the smooth straight rail rod where the thread is advanced and retreated, and the teeth of the meshing teeth face downward;

Two propulsion shaft seats 34 are fixedly arranged on the machine tool, and a propulsion through shaft 35 is erected between the two propulsion shaft seats. Two propulsion gears 36 are fixedly connected to the shaft body of the propulsion through shaft respectively, and the two propulsion gears mesh with two propulsion gears respectively. The rack, the operating end of the propulsion through shaft extends and protrudes out of the edge of the machine tool and is fixedly connected with a propulsion operation handwheel 37;

The positive and negative rotation of the propulsion operation handwheel drives the propulsion rack and the threading rail ring to advance and retreat along the direction of the threading advance and retreat smooth straight rail rod, and makes the threading main body move forward and backward horizontally.

The all-in-one machine for steel wire threading and grinding includes a threading mechanism and a grinding mechanism. The threading mechanism is a general-purpose threading machine. The grinding mechanism includes an angle grinder, a rotating bracket, a leveling device, and a horizontal moving device. The two mechanisms are combined together. The integrated operation of threading and grinding steel bars can be realized.

The threading mechanism is a threading machine commonly used in on-site construction. Its function is to quickly and directly roll the end of the steel bar at one time, so that the end will undergo cold hardening, thereby increasing the strength, and making the steel wire end the same as the base material.

The grinding mechanism includes an angle grinder, a rotating bracket, a leveling device, and a horizontal moving device, among which:

Angle grinder is used for grinding the ends of steel bars;

The grinding turning frame is used to support the angle grinder and adjust the role of the machine in switching between threading operation and grinding operation;

The leveling device is used to adjust the vertical effect of the angle grinder and the steel bar. The bar leveling device can also use the principle of leverage, using crimping bolts to support or crimp the vertical frame at a place far away from the turning hinge axis, and using the feeding or withdrawal of the bolts to mechanically adjust the horizontal position of the vertical frame.

The horizontal moving device is used to adjust the distance between the angle grinder and the end of the steel bar, and control the length of grinding.

When in use, first use the threading mechanism for threading operations; then use the grinding mechanism for grinding operations: first use the rotating device to roughly adjust the angle grinder to a horizontal position, and then use the leveling device to precisely adjust the angle grinder to be perpendicular to the steel bar Start the angle grinder, use the horizontal moving device to adjust the distance between the angle grinder and the end of the steel bar, and control the length of grinding.

Claims (5)

1. A steel bar threading and grinding all-in-one machine, characterized in that it comprises a machine tool, a threading mechanism and a grinding mechanism, The threading body of the threading mechanism lies horizontally on the upper surface of the machine tool. The bottom of the threading body is fixedly connected with a threading frame, and the legs of the threading frame are set as threading rail rings. The upper surface of the machine tool is fixedly connected with a threaded advance and retreat rail frame. The threaded advance and retreat rail frame is equipped with a threaded parallel advance and retreat double track. on the rack; The threading rail rings at the feet of the threading frame are respectively threaded on the rod body of the threading advance and retreat smooth straight rail rod, and connected with the threading advance and retreat smooth straight rail sliding sleeve type linear sliding connection to form a threading slide rail sliding mechanism ; The threading advance and retreat rail frame is equipped with a threading advance and retreat terminal limit stopper, which limits the linear sliding range of the threading rail ring sleeve on the threading advance and retreat smooth straight rail rod; Threading track ring sleeve, threading frame and threading main body are fixedly connected as an integral threading mechanism; The two sets of thread advance and retreat smooth straight rails are respectively parallel to the central axis of the thread set main body; The front threading working end of the threading body faces the steel bar fastening table, which is fixedly arranged on the machine tool; the steel bar straight body is fastened by fastening pliers on the steel bar fastening table, and the steel bar straight body to be threaded section faces the sleeve The main body of the wire is a straight steel bar and is arranged on the same central axis as the main body of the thread; The machine tool is equipped with threading main thruster; A grinding advance and retreat rail frame with a grinding mechanism is fixed on the peripheral machine tool in the horizontal direction of the wire thread advance and retreat rail frame. The grinding advance and retreat rail frame is equipped with a grinding parallel advance and retreat double rail. The pole is fixed on the grinding advance and retreat rail frame; The two polished straight rails and the two threaded smooth straight rails are parallel to each other; Sliders are respectively arranged on the body of the two parallel polished smooth straight rail rods, and the two sliders are respectively fixedly connected with the feet of the grinding turning frame. frame, The grinding and turning frame is fixedly connected by the horizontal frame and the vertical frame fixedly connected at both ends of the horizontal frame. The horizontal frame is fixed on the top of the two vertical frames. Arrangement and the bottom end of the vertical frame is hinged on the top of the grinding flip frame leg through the flip hinge; the horizontal frame and the two vertical frames are in the same plane; the two flip hinges are on the same central axis; The grinding and turning frame has a turning degree of freedom relative to the feet of the grinding turning frame through the turning hinge shaft; An electric angle grinder is fixed at the center of the horizontal frame. The two turning hinges are equipped with the same leveling device. The leveling device can adjust the turning angle of the grinding turning frame in real time. The ends of the sleeves are horizontally opposite; The two sliders are connected to the horizontal moving device, which is fixed on the upper surface of the machine tool; the horizontal moving device provides horizontal forward and backward movements for the grinding and turning frame, and cooperates with the leveling device to adjust the turning angle of the grinding and turning frame, so that the grinding and turning frame will be electrically powered The position of the angle grinder is at the level relative to the wire end of the steel bar, and the electric angle grinder is fed and withdrawn in the horizontal direction, and the end angle grinding is performed on the end of the wire end of the steel bar. 2. The all-in-one machine for steel wire threading and grinding according to claim 1, characterized in that: the main body of thread threading is composed of a machine body, a motor, a reduction box, a pipe chuck, a die head, a cutter frame, a knife feeder, and a cooling system composition. 3. The all-in-one machine for steel bar threading and grinding according to claim 1, characterized in that: the leveling device adopts an angle rotation motor, and the angle rotation motor is connected to two turning hinge shafts, and the angle rotation motor controls the turning of the turning hinge shaft The angle has two working states respectively: the first working state is that the turning of the turning hinge shaft makes the grinding and turning frame tilt up, so that the electric angle grinder does not participate in the work for the steel bar; the second working state is the turning of the turning hinge shaft to make the grinding turning frame Fall and turn over and make the grinding and flipping frame lock in the horizontal position, so that the electric angle grinder can grind the threaded end of the steel bar at the relative horizontal position of the steel bar. 4. The all-in-one machine for steel bar threading and grinding according to claim 1, characterized in that: the horizontal moving device adopts the corresponding translation racks fixedly connected to the bottom ends of the two sliders respectively, and each translation rack is connected to the The sliding block corresponding to the grinding advance and retreat smooth straight rails are parallel to each other; On the bottom side of the two translational racks, there are meshing teeth arranged along the length span direction of each polished straight rail rod, and the teeth of the meshing teeth face downward; The machine tool is fixedly equipped with two translation shaft seats, and a translation through shaft is erected between the two translation shaft seats. Two translation gears are fixedly connected to the shaft bodies of the translation through shaft, and the two translation gears mesh with two translation racks respectively. The operating end of the translation through shaft extends and protrudes out of the edge of the machine tool and is fixedly connected with a translation operation handwheel; The positive and negative rotation of the translation operation hand wheel drives the translation rack and the slider to move forward and backward along the direction of the smooth straight rail bar for grinding and advancing and retreating, and makes the grinding and flipping frame move forward and backward horizontally. 5. The all-in-one machine for steel threading and grinding according to claim 1, characterized in that: the threading body propeller is respectively fixedly connected to the corresponding propelling racks at the bottom ends of the two threading rail rings, each The advancing rack is parallel to the smooth straight rail bar corresponding to the threading rail ring where it is located; On the bottom side of the two propulsion racks, there are meshing teeth arranged along the length span direction of the smooth straight rail rod where the thread is advanced and retreated, and the teeth of the meshing teeth face downward; Two propulsion shaft seats are fixedly arranged on the machine tool, and a propulsion through shaft is erected between the two propulsion shaft seats. Two propulsion gears are fixedly connected to the shaft body of the propulsion through shaft, and the two propulsion gears mesh with two propulsion racks respectively. The operating end of the propulsion through shaft extends and protrudes out of the edge of the machine tool and is fixedly connected with a propulsion operation handwheel; The positive and negative rotation of the propulsion operation handwheel drives the propulsion rack and the threading rail ring to advance and retreat along the direction of the threading advance and retreat smooth straight rail rod, and makes the threading main body move forward and backward horizontally.