A wire drawing machine facilitating feeding

Abstract

The application discloses a thread rolling machine facilitating feeding, relates to the thread processing technical field, and solves the problem of large temperature loss after blank heating caused by long feeding stroke of the existing thread rolling machine. The thread rolling machine comprises a first thread rolling plate and a second thread rolling plate, a feeding mechanism, a heating mechanism and a feeding mechanism. The feeding mechanism comprises a suction rod and a pushing driving element for controlling horizontal movement of the suction rod. The front end of the suction rod is provided with a suction port capable of generating negative pressure. The suction rod can be horizontally moved to the discharge port of the feeding mechanism by the pushing driving element to suck the blank, and can push the blank into the through hole, heat the blank by the heating coil, and then push the blank into the supporting area. In the application, the feeding mechanism can sequentially push the blank into the angle formed between the slope area on the upper edge of the first thread rolling plate and the lower edge of the second thread rolling plate or between the slope area on the upper edge of the second thread rolling plate and the lower edge of the first thread rolling plate after taking the blank. The feeding stroke is relatively short, and feeding can be completed in the shortest time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thread processing, in particular to a thread rolling machine facilitating feeding. BACKGROUND

[0002] The thread rolling machine is a device for processing thread, and when the thread rolling plate is used to process the external thread (such as the external thread of a bolt or a screw) of a threaded part, the thread rolling machine drives one of the thread rolling plates to move back and forth, and the two thread rolling plates are static and dynamic, and finally the thread on the thread rolling plate is used to roll the thread on the part to be processed or the structure to form the external thread, such as the thread rolling machine shown in CN107649627B.

[0003] The existing thread rolling machine has the following obvious defects: firstly, the feeding of the bolt blank is mostly dependent on manual operation or a mechanical arm, and the blank needs to be preheated before feeding so that the thread can be better extruded and formed. Manual feeding is slow and has certain risks. The cost of using a mechanical arm for feeding is relatively high, and usually a single industrial robot costs tens of thousands or even hundreds of thousands of yuan. When feeding, the heated blank is placed in the gap between the two thread rolling plates, and then the two thread rolling plates clamp the blank, and finally the blank is released by manual operation or a mechanical arm. The whole feeding process is long, which is difficult to meet the needs of batch production. Secondly, the heating coil of the existing warm thread rolling machine is generally installed in the middle of the straight-line feeding track, and after heating, the workpiece still needs to continue to slide on the track for a period of time. In this sliding process, the workpiece will lose a lot of heat. At the same time, since the heating coil is arranged in a straight line, it cannot uniformly heat the circumference of the workpiece like a circular coil. Also, since the workpiece is always in a moving state during heating, the heating temperature of the workpiece cannot be effectively and reliably controlled, and it is difficult to ensure the uniformity and consistency of the heating temperature of the workpiece. SUMMARY

[0004] The purpose of the present application is to solve the above problems, and a thread rolling machine facilitating feeding is designed to solve the problem of large temperature loss of the blank after heating due to the long feeding stroke of the existing thread rolling machine.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: a thread rolling machine facilitating feeding, comprising:

[0006] The first thread rolling plate and the second thread rolling plate are oppositely arranged and can move up and down in a staggered manner, and a processing space is formed between the first thread rolling plate and the second thread rolling plate. A slope region is arranged on the first thread rolling plate or the second thread rolling plate, and the slope region is arranged at one end of the first thread rolling plate and the second thread rolling plate that is opposite to the thread rolling starting state. An included angle for supporting the blank is formed between the slope region of the upper edge of the first thread rolling plate and the lower edge of the second thread rolling plate, or between the slope region of the upper edge of the second thread rolling plate and the lower edge of the first thread rolling plate.

[0007] a feeding mechanism for feeding the blank to a designated position;

[0008] a heating mechanism, the heating mechanism comprising a heating coil having a through hole thereon;

[0009] a feeding mechanism, the feeding mechanism comprising a suction rod having a suction port capable of generating negative pressure at a front end thereof, and a pushing drive member for controlling horizontal movement of the suction rod, the suction rod being capable of being moved horizontally by the pushing drive member to a discharge port of the feeding mechanism to suck the blank, and capable of pushing the blank into the through hole, heating the blank by the heating coil, and then pushing the blank into an included angle formed between the first wire drawing plate and the second wire drawing plate.

[0010] Further, the feeding mechanism comprises a vibrating disc assembly, a distributing assembly, and a positioning assembly, the distributing assembly comprising a support frame, a fixed support mounted at a top end of the support frame, a discharging slide plate obliquely arranged on the fixed support, a distributing cylinder arranged above the discharging slide plate, and a distributing plate connected to an output end of the distributing cylinder, an upper end of the discharging slide plate being connected to a discharge port of the vibrating disc assembly, and the positioning assembly being arranged at a discharge port of the discharging slide plate.

[0011] Further, first and second support plates are arranged at two sides of the support frame respectively, the distributing cylinder is obliquely fixed on the second support plate and located above the discharge port of the discharging slide plate, the first support plate has first and second abutting plates arranged at a side close to the discharging slide plate, the second abutting plate being located above the first abutting plate, and a guide area for limiting a head of the blank being formed between the first and second abutting plates and the discharging slide plate.

[0012] Further, the positioning assembly comprises a cylinder fixing frame, a lifting cylinder vertically arranged on the cylinder fixing frame, a V-shaped seat connected to an output end of the lifting cylinder, a positioning groove plate arranged on the V-shaped seat, and a blocking plate arranged on the positioning groove plate, the positioning groove plate having a positioning groove for positioning the blank, the blocking plate being located at a side of the positioning groove away from the discharging slide plate, and an extension direction of the positioning groove being consistent with a moving direction of the suction rod.

[0013] Further, the heating mechanism further comprises a heater, and a lifting table for controlling lifting of the heater, the heating coil being mounted on the heater, and an axis of the through hole on the heating coil and an axis of the suction rod being located in a same vertical plane.

[0014] Further, the machine tool further comprises:

[0015] a machine tool integrally casted and formed, the machine tool having a front-to-rear through mounting space in a middle thereof, the first wire drawing plate and the second wire drawing plate being respectively located at two sides of the mounting space.

[0016] A rotating table is arranged on one side of the machine tool and can rotate around the side of the machine tool, and the feeding mechanism, the feeding mechanism and the heating mechanism are arranged on the rotating table, and the other side of the rotating table is provided with a locking mechanism for locking the rotating table.

[0017] Further, the locking mechanism comprises a first fixing part, a second fixing part and a third fixing part, the first fixing part is vertically arranged, and the upper end of the first fixing part is fixed on the rotating table, and the lower end is connected with the second fixing part, the third fixing part is installed on the machine tool, and the other end of the second fixing part is detachably connected with the third fixing part.

[0018] Further, the lower side of the third fixing part is outwardly protruded horizontally to form a connecting part, and the bottom of the second fixing part is downwardly protruded to form a stop part, the second fixing part can be overlapped on the third fixing part, and the connecting part of the third fixing part can be abutted with the stop part and fixed with the second fixing part through bolts.

[0019] Further, the rotating table is provided with a slidable mounting plate and a centering adjusting mechanism, the mounting plate can move along the direction of the interval between the left and right wire drawing dies, the centering adjusting mechanism comprises a screw rod rotatably connected to the rotating table and a handle connected to one end of the screw rod, the screw rod is in transmission connection with a screw rod seat fixed on the bottom of the mounting plate, and the feeding mechanism, the feeding mechanism and the heating mechanism are arranged on the mounting plate.

[0020] Further, one side of the rotating table is provided with a digital caliper for detecting the moving distance of the mounting plate.

[0021] Compared with the prior art, the beneficial effects are that:

[0022] In the present application, the pushing driving part controls the horizontal movement of the suction rod to the discharge port of the feeding mechanism to take the material, the suction port at the front end of the suction rod uses negative pressure to suck the blank, and then the blank is continuously pushed forward to the through hole of the heating coil to heat the blank, and then the heated blank is pushed forward to the support area formed between the inclined area of the upper edge of the second wire drawing plate and the lower edge of the first wire drawing plate or between the inclined area of the upper edge of the first wire drawing plate and the lower edge of the second wire drawing plate, and the inclined area supports the blank, and then the suction rod returns to the original position. The stroke is short during the whole feeding process, and the feeding can be completed in the shortest time, which is convenient and fast.

[0023] During wire drawing processing, the first wire drawing plate and the second wire drawing plate move synchronously upward and downward, and under the guidance of the inclined area, the blank enters the processing space between the first wire drawing plate and the second wire drawing plate, and the blank will not be lifted upward.

[0024] By arranging the heating coil at the discharge port, the single piece of blank is heated one by one in the form of a circular coil, so that the digital effective control of the heating temperature of the single product can be realized, and the uniformity and consistency of the blank heating temperature are ensured. After the blank falls on the positioning assembly from the discharge port, the blank is pushed horizontally into the heating coil by the feeding mechanism, and after heating, it is continuously pushed into the machining area to complete the subsequent clamping machining, so that the consistency of the temperature loss generated during the transfer process can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the overall structure schematic diagram of the wire drawing machine in the application;

[0026] Figure 2 is the structure schematic diagram of another view of the wire drawing machine;

[0027] Figure 3 is the structure schematic diagram of the machine body of the wire drawing machine;

[0028] Figure 4 is the structure schematic diagram of another view of Figure 3 ;

[0029] Figure 5 is the front view structure schematic diagram of the left wire drawing die and the right wire drawing die.

[0030] Figure 6 is the shaft side structure schematic diagram of the left wire drawing die and the right wire drawing die;

[0031] Figure 7 is the structure schematic diagram of the left wire drawing die;

[0032] Figure 8 is the structure schematic diagram of another view of the left wire drawing die;

[0033] Figure 9 is the exploded structure schematic diagram of the left wire drawing die;

[0034] Figure 10 is the installation structure schematic diagram of each structure on the left die mounting seat in the left wire drawing die;

[0035] Figure 11 is the structure schematic diagram of the left slide seat in the left wire drawing die;

[0036] Figure 12 is the installation structure schematic diagram of the right wire drawing die, the downward pressing positioning structure and the axial positioning mechanism;

[0037] Figure 13 is the structure schematic diagram of the right wire drawing die;

[0038] Figure 14 is the exploded structure schematic diagram of the right wire drawing die;

[0039] Figure 15 is a structural schematic diagram of the downward positioning mechanism;

[0040] Figure 16 is a schematic diagram of the first and second thread rolling plates when cooperating with the blank;

[0041] Figure 17 is a schematic diagram of the installation structure of each structure on the rotating table;

[0042] Figure 18 is a schematic diagram of the structure of the material separating assembly in the feeding mechanism;

[0043] Figure 19 is a schematic diagram of the structure of the positioning assembly in the feeding mechanism;

[0044] Figure 20 is a schematic diagram of the structure of the heating mechanism;

[0045] Figure 21 is a schematic diagram of the feeding mechanism when cooperating with the positioning assembly and the heating mechanism;

[0046] Figure 22 is a schematic diagram of the structure of the locking mechanism

[0047] Figure 23 is a schematic diagram of the structure of the material separating mechanism;

[0048] Figure 24 is a schematic diagram of the structure of the separating mechanism from another perspective.

[0049] In the figure, 1, fuselage; 2, left wire drawing die; 201, left fixed seat; 202, left sliding seat; 2021, first accommodating groove; 2022, second accommodating groove; 203, left die mounting seat; 204, first wire drawing plate; 205, first taper adjusting mechanism; 2051, fixed plate; 2052, commutator; 2053, first adjusting block; 2054, long screw; 206, die seat; 3, right wire drawing die; 301, right fixed seat; 302, right sliding seat; 3021, third accommodating groove; 3022, fourth accommodating groove; 303, right die mounting seat; 304, second wire drawing plate; 3041, slope area; 305, second taper adjusting mechanism; 3051, second adjusting block; 306, spacing adjusting mechanism; 3061, third adjusting block; 307, support plate; 4, feeding mechanism; 41, vibration disc assembly; 42, distributing assembly; 421, support frame; 422, first support plate; 423, second support plate; 424, fixed support; 425, discharging sliding plate; 426, distributing cylinder; 427, distributing plate; 428, first abutting plate; 429, second abutting plate; 43, positioning assembly; 431, cylinder fixing frame; 432, lifting cylinder; 433, V-shaped seat; 434, positioning groove plate; 435, material blocking plate; 5, feeding mechanism; 51, feeding cylinder; 52, suction rod; 6, heating mechanism; 61, base frame; 62, lifting table; 63, heater; 64, heating coil; 7, rotary table; 71, mounting plate; 72, centering adjusting mechanism; 73, digital caliper; 8, servo driving mechanism; 801, servo motor; 802, lead screw; 803, motor mounting seat; 9, locking mechanism; 91, first fixing member; 92, second fixing member; 921, position stopping part; 93, third fixing member; 931, connecting part; 10, bed table; 11, oil return groove; 12, distributing mechanism; 121, distributing hopper; 1211, partition plate; 122, rotary cylinder; 123, distributing blocking plate; 124, pipeline; 13, downward pressing positioning mechanism; 131, support; 132, downward pressing cylinder; 133, pressing plate; 134, lifting screw; 14, axial positioning mechanism; 141, fixed-length positioning plate; 15, cooling oil pipe; 16, clamping member; 17, knob; 18, handle; 19, rotating shaft; 20, rotating shaft positioning block; 21, semicircular shaft; 22, fixed block; 23, side fixed block; 24, screw; 25, nut; 26, top pressing oil cylinder; 27, guide strip; 28, driving rod; 29, pull rod; 30, balance cylinder; 31, rotating shaft seat; 32, material receiving oil tank; 33, material box; 34, blank. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0051] The preferred embodiment of the present application provides a thread rolling machine facilitating feeding, which is suitable for forming processing of bolts of various specifications.

[0052] Specifically, referring to Figures 1-6 The thread rolling machine mainly comprises a machine body 1, a left thread rolling die 2, a right thread rolling die 3, a feeding mechanism 4, a heating mechanism 6, a feeding mechanism 5, a downward pressing positioning mechanism 13, an axial positioning mechanism 14 and two servo driving mechanisms 8.

[0053] The machine body 1 is made of cast iron and is integrally cast, having the advantages of high strength and being not easy to deform. The machine body 1 has a front-to-rear through H-shaped mounting space, so that the shape of the machine body 1 presents a “H” shape, and the left and right sidewalls of the mounting space are also reinforced.

[0054] In the design of the machine body 1, the U-shaped machine body structure of the conventional thread rolling machine in the current prior art is referred to. Through mechanical analysis of the structure, it is found that under the condition of a large lateral load, the overall machine body will have an outward expansion phenomenon due to the characteristics of the U-shaped machine body, which will also be reflected in the size fluctuation of the processed product. The actual processing result is consistent with the theoretical analysis, proving that the theoretical analysis is correct. In order to solve the problem, the prior art increases a pull beam above the U-shaped machine body to reduce the outward expansion phenomenon of the machine body under stress. Since the size and installation position of the pull beam used have limitations, the weakening range of the outward expansion phenomenon is not consistent.

[0055] Therefore, we adopt the H-shaped closed force machine body 1 integrally cast by nodular cast iron, which is integrally processed after stress relief annealing and aging treatment, to realize accurate control of the installation position and size of each component.

[0056] The H-shaped integrally cast closed force machine body 1 is subjected to stress, strain and modal analysis by establishing a finite element analysis. A limit load of 200KN is applied to the machine body laterally, and under the limit load of 200KN, the maximum strain of the machine body is only 0.0009011.

[0057] At the same time, the H-shaped integrally cast closed force machine body 1 is subjected to equivalent stress analysis in the Ansys software. Under the limit load condition, the average equivalent stress of the machine body is about 24.7Mpa, and the maximum value is about 257Mpa. It can be seen that the overall structure design of the machine body is reasonable, and the rigidity and strength of the structure fully meet the needs of the actual processing process. Under the condition of bearing the limit load, the rigidity deformation will not cause the loss of processing size precision.

[0058] AsFigures 2-3 As shown, the left and right sides of the installation space on the fuselage 1 are respectively provided with the bed 10, and the two beds 10 are oppositely arranged and fixedly installed on the corresponding side walls in the installation space. The two servo drive mechanisms 8 are installed on the top of the fuselage 1 and are located directly above the two beds 10.

[0059] The left and right thread rolling dies 2 and 3 are oppositely arranged and are respectively slidably connected to the two beds 10. The two servo drive mechanisms 8 drive the left and right thread rolling dies 2 and 3 to move upward and downward synchronously and oppositely.

[0060] The opposite sides of the two beds 10 have a recess extending upward and downward, which is used for installing the screw rod 802 in the servo drive mechanism 8. On the opposite sides of the two beds 10, a slide rail is arranged on each side of the recess, and the left and right thread rolling dies 2 and 3 are slidably connected to the corresponding slide rails through the sliding blocks.

[0061] The main force-bearing components of the thread rolling machine are the overall cast closed force-receiving fuselage 1 in the shape of a mouth and the slide rails and beds 10 on the two sides with large loads. As the main load-bearing components of the positive pressure, they directly determine whether the diameter accuracy of the processed parts meets the standards, and need to have the characteristics of high strength and high rigidity.

[0062] Meanwhile, the two beds and the overall cast closed force-receiving fuselage in the shape of a mouth are combined for finite element analysis. Due to the increase in the thickness of the main force-bearing part structure, the equivalent stress under the condition of the limit load is reduced, and the average value and the maximum value are about 2 / 3 of the original.

[0063] The thicknesses of the fuselage 1 and the beds 10 are increased. The increase in the thickness of the force-bearing structure does not reduce the natural frequency of the structure. The actual processing rhythm of the machine tool is still much smaller than the natural frequency of the structure, and the machine tool still maintains good anti-resonance characteristics.

[0064] Referring to Figure 3 The servo drive mechanism 8 mainly comprises a servo motor 801, a screw rod 802, and two bearing seats. The two bearing seats are respectively located on the upper and lower sides of the recess on the bed 10, and the upper and lower ends of the screw rod 802 are rotatably connected to the two bearing seats. An electric motor mounting seat 803 is arranged on the top of each of the two beds 10, and the two servo motors 801 are respectively installed on the two electric motor mounting seats 803. Due to the limited size of the installation space, the fuselage 1 has an avoiding hole at the position corresponding to the servo motor 801 on the top of the fuselage 1, so that the fuselage 1 can pass through the avoiding hole and be pulled out from the top of the fuselage 1. The upper end of the screw rod 802 is drivingly connected to the output end of the servo motor 801.

[0065] The screw rod 802 is drivingly connected to the left and right thread rolling dies 2 and 3, and the servo motor 801 controls the rotation of the screw rod 802, thereby driving the left and right thread rolling dies 2 and 3 to move upward and downward.

[0066] The slide system in the embodiment adopts high-performance servo digital motor and large load driving stage ball screw to independently drive the up-down movement of the left or right thread rolling die in a servo direct drive manner, and the position of the bed table 10 is accurately controlled by the numerical control system, so that high-precision control and positioning of the bed table 10 are realized.

[0067] Compared with the slide driving system of the traditional flywheel connecting rod type thread rolling machine, the servo direct drive system has the characteristics of good dynamic response, accurate position control, less transmission links and small return gap. At the same time, since the flywheel connecting rod type driving slide runs by inertia after the flywheel runs, the traditional thread rolling machine has the problems of difficulty in manual processing of single pieces, difference between manual adjustment of processing size and automatic processing. The driving force of the bed table 10 is directly provided by the servo motor in the servo direct drive slide system, and the instantaneous torque can be changed in real time according to the needs, so that the position control in the running process is more accurate. At the same time, the servo direct drive slide system has obvious advantages in tooth operation and single piece processing compared with the traditional flywheel connecting rod driving.

[0068] As shown in Figures 7-11 The left thread rolling die 2 is mainly composed of a left fixed seat 201, a left slide seat 202, a left die mounting seat 203, a taper adjustment mechanism 205 and a first thread rolling plate 204. The left fixed seat 201 is connected to the slide rail on the bed table 10 through a sliding block and slides up and down, and the left slide seat 202 is fixedly installed on the left fixed seat 201 through bolts on the side away from the slide rail. The left die mounting seat 203 can be horizontally deflected relative to the left slide seat 202, and the first thread rolling plate 204 is installed on the left die mounting seat 203.

[0069] First accommodating grooves 2021, second accommodating grooves 2022 and positioning grooves are formed on the opposite sides of the left slide seat 202 and the left die mounting seat 203. The second accommodating grooves 2022 are located on the same side of the left slide seat 202 and the left die mounting seat 203 and extend upward and downward. The first accommodating grooves 2021 are located in the middle of the second accommodating grooves 2022 and separate the second accommodating grooves 2022 into two parts. The positioning grooves are located on the other side of the left slide seat 202 and the left die mounting seat 203 (the side away from the second accommodating grooves 2022).

[0070] The rotating shaft 19 and the rotating shaft positioning block 20 are located between the left slide seat 202 and the left die mounting seat 203. The rotating shaft 19 is vertically arranged and embedded into the two second accommodating grooves 2022. The cross section of the second accommodating groove 2022 is semicircular and matches the outer arc surface of the rotating shaft 19. The two ends of the rotating shaft positioning block 20 are embedded into the two first accommodating grooves 2021. A circular hole is formed in the middle of the rotating shaft positioning block 20, and the rotating shaft 19 passes through the circular hole.

[0071] The rotation shaft positioning block 20 is fixed on the left mold mounting seat 203 by long bolts. The side surface of the rotation shaft positioning block 20 is a plane which is tightly close to the side wall of the second accommodating groove 2022 of the left mold mounting seat 203. The other side of the rotation shaft positioning block 20, i.e. the part embedded into the second accommodating groove 2022 of the left slide base 202, is rounded to avoid interference when the left mold mounting seat 203 is deflected relative to the left slide base 202.

[0072] The cross section of the positioning groove is also semicircular to match the arc surface of the semicircular shaft 21. The semicircular shaft 21 is vertically arranged and its arc surface is tightly close to the positioning groove.

[0073] Referring to FIG. 8, Figure 9 The taper adjusting mechanism 205 mainly comprises a first adjusting block 2053, a fixed plate 2051, a screw rod, a rotating rod, a reverser 2052 and the like. The reverser 2052 is fixedly installed on the fixed plate 2051, and the fixed plate 2051 is fixedly installed on the left fixed base 201 by bolts. The rotating rod and the screw rod are respectively connected with the input end and the output end of the reverser 2052, and the directions of the input end and the output end of the reverser 2052 are perpendicular to each other. The other end of the rotating rod is provided with a rotating handle 18, and the other end of the screw rod is drivingly connected with the first adjusting block 2053. The rotating handle 18 is rotated to drive the rotating rod to rotate, and then the reverser 2052 is reversed to drive the screw rod to rotate, and then the first adjusting block 2053 is moved forward and backward.

[0074] The rotating rod of the taper adjusting mechanism 205 is manually controlled to rotate, and in other embodiments, a motor can be used to electrically control the rotating rod to rotate.

[0075] The left fixed base 201 is further provided with a locking member and a knob 17 which is threadedly connected with the locking member and connected with the screw rod connected with the input end of the reverser 2052. When the angle of the first wire rubbing plate 204 is adjusted, the knob 17 can be screwed to tightly hold the screw rod by the locking member to prevent the screw rod from rotating.

[0076] The left slide base 202 has a recess near the left mold mounting base 203, so that a large gap is formed between the left slide base 202 and the left mold mounting base 203. The first adjusting block 2053 is a wedge-shaped block, which is inserted into the gap and in contact with the plane of the recess. The first adjusting block 2053 has a beveled side in contact with the plane of the semicircular shaft 21. When the first adjusting block 2053 is gradually inserted into the gap between the left slide base 202 and the left mold mounting base 203, the left mold mounting base 203 and the first thread rolling plate 204 are deflected horizontally relative to the left slide base 202 through the rotating shaft 19, thereby adjusting the angle of the first thread rolling plate 204. At this time, the left mold mounting base 203 also rotates relative to the semicircular shaft 21.

[0077] Referring to Figure 11 Two guide bars 27 are arranged in the recess of the left slide base 202, which extend along the sliding direction of the first adjusting block 2053. Correspondingly, two guide grooves (not shown in the figure) are formed in the first adjusting block 2053, and the guide bars 27 are horizontally connected with the guide grooves, which provide guidance for the sliding of the first adjusting block 2053 and prevent the first adjusting block 2053 from deviating.

[0078] Referring to Figure 10 Two through holes (not labeled in the figure) are formed in the left mold mounting base 203 and the left slide base 202, and a long screw 2054 is arranged in the through holes. The through hole in the left mold mounting base 203 has a counterbore, and the long screw 2054 is screwed with the left fixed base 201 after passing through the through holes in the left mold mounting base 203 and the left slide base 202. The head of the long screw 2054 is retracted into the counterbore, and the rod of the long screw 2054 is clearance-fitted with the two through holes, so as to provide a margin for the deflection of the left mold mounting base 203. After the long screw 2054 is screwed with the left fixed base 201, the left mounting base after adjustment is tightly fixed on the left slide base 202, so that the rotating shaft 19 will not be separated from the left slide base 202.

[0079] Two avoiding grooves are also formed in the corresponding position of the first adjusting block 2053, which give the long screw 2054 a space and do not interfere with the movement of the first adjusting block 2053.

[0080] As Figure 10As shown, the left mold mounting seat 203 has an installation groove (not labeled in the figure) near the side of the right thread rolling die 3. The installation groove is located near the lower side of the left mold mounting seat 203. The two adjacent sides of the installation groove have inner walls, and the other two sides are through. The die seat 206 is installed in the installation groove, and the die seat 206 is usually fixed in the installation groove by bolts. The first thread rolling plate 204 is located on the die seat 206. The top surface of the first thread rolling plate 204 is inclinedly matched with the die seat 206. The fixed block 22 is arranged at the bottom of the left mold mounting seat 203. The fixed block 22 is fixed at the bottom of the left mold mounting seat 203 by bolts, and the bottom surface of the first thread rolling plate 204 is also inclinedly matched with the fixed block 22. By tightening the bolts, the fixed block 22 will exert a pressing force on the bottom of the first thread rolling plate 204 under the action of the inclined surface, so that the first thread rolling plate 204 is tightly fixed on the die seat 206.

[0081] Two side fixed blocks 23 and two top pressing oil cylinders 26 are arranged on the side surface of the left mold mounting seat 203. The two top pressing oil cylinders 26 correspond to the two side fixed blocks 23 one by one. The top pressing oil cylinder 26 is installed inside the left mold mounting seat 203, and the output end thereof faces outward. A waist-shaped hole is arranged in the middle of each side fixed block 23. The waist-shaped hole extends horizontally. A screw rod 24 is arranged in the waist-shaped hole. The screw rod 24 is threadedly connected with the left mold mounting seat 203. The screw rod 24 is threadedly connected with the nut 25 after penetrating through the waist-shaped hole. One end of the side fixed block 23 is in contact with the side surface of the first thread rolling plate 204, and the other end is in contact with the output end of the top pressing oil cylinder 26. The nut 25 acts as a fulcrum. By the top pressing oil cylinder 26, an outward pressing force is exerted on one end of the side fixed block 23. By the lever principle, the other end of the side fixed block 23 (i.e., the end away from the top pressing oil cylinder 26) will abut against the side surface of the first thread rolling plate 204 and press the side surface of the first thread rolling plate 204 tightly. Thus, the four side surfaces of the first thread rolling plate 204 are fixed in position, so that the installation position of the first thread rolling plate 204 will not shift during thread rolling processing. By the lever action, a greater pressing force is exerted on the side surface of the first thread rolling plate 204.

[0082] The hydraulic locking force of the hydraulic oil cylinder is stable and continuous, so it will not loosen under alternating stress. Therefore, the teeth on the opposite sides of the two thread rolling plates will not change, and the size will not change. This is a stable prerequisite, and the change of the locking force of the thread rolling plate can be monitored by monitoring the change of the hydraulic pressure.

[0083] As Figures 12-14As shown, the right thread rolling die 3 mainly consists of a right fixed base 301, a right slide base 302, a right die mounting base 303, a parallelism adjusting mechanism 305, a spacing adjusting mechanism 306, and a second thread rolling plate 304, etc. The right fixed base 301 is connected to the slide rail on the corresponding bed 10 through a sliding block, and the right slide base 302 is fixedly installed on the side of the right fixed base 301 away from the slide rail through bolts. The right die mounting base 303 can be deflected up and down relative to the right slide base 302, and the second thread rolling plate 304 is installed on the right die mounting base 303.

[0084] A third accommodating groove 3021, a fourth accommodating groove 3022 and a positioning groove are arranged on the opposite side of the right slide base 302 and the right die mounting base 303. The third accommodating groove 3021 is located on the same side of the right slide base 302 and the right die mounting base 303, and extends horizontally. The fourth accommodating groove 3022 is located in the middle of the third accommodating groove 3021, and separates the third accommodating groove 3021 into two parts. The positioning groove is located on the other side of the right slide base 302 and the right die mounting base 303 (the side away from the third accommodating groove 3021), and also extends horizontally.

[0085] The rotating shaft 19 and the rotating shaft positioning block 20 are located between the right slide base 302 and the right die mounting base 303. The rotating shaft 19 extends along the width direction of the second thread rolling plate 304 and is embedded into the two third accommodating grooves 3021. The cross-sectional shape of the third accommodating groove 3021 is also semicircular, which is matched with the outer arc surface of the rotating shaft 19. The two ends of the rotating shaft positioning block 20 are embedded into the two third accommodating grooves 3021. A circular hole is arranged in the middle of the rotating shaft positioning block 20, and the rotating shaft 19 passes through the circular hole.

[0086] The rotating shaft positioning block 20 is fixed on the right die mounting base 303 through long bolts. The side surface of the rotating shaft positioning block 20 is a plane, which is close to the side wall of the fourth accommodating groove 3022 on the right die mounting base 303. The other side of the rotating shaft positioning block 20, i.e. the part embedded into the fourth accommodating groove 3022 on the right slide base 302, is chamfered, so that the right die mounting base 303 will not interfere when it is deflected relative to the right slide base 302.

[0087] The cross-sectional shape of the positioning groove is also semicircular, which is matched with the arc surface of the semicircular shaft 21. The semicircular shaft 21 is arranged horizontally, and its arc surface is close to the positioning groove.

[0088] Referring to Figure 13 , Figure 14The parallelism adjustment mechanism 305 is located at the bottom of the right mold mounting seat 303. The parallelism adjustment mechanism 305 mainly comprises a second adjusting block 3051, a fixed plate 2051, a lead screw, a motor mounting seat 803, a motor and the like. The commutator 2052 is fixedly installed on the motor mounting seat 803, and the motor mounting seat 803 is fixedly installed on the bottom of the support plate through bolts. The output end of the motor is connected with the input end of the commutator 2052, the output end of the commutator 2052 is connected with the lead screw, and the directions of the input end and the output end of the commutator 2052 are perpendicular. The lead screw is in transmission connection with the second adjusting block 3051 through the support plate. After the motor works, the lead screw is driven to rotate through the commutator 2052, and then the second adjusting block 3051 is driven to move up and down.

[0089] The lead screw in the parallelism adjustment mechanism 305 is electrically controlled to rotate, and in other embodiments, the lead screw can also be manually controlled to rotate.

[0090] The right slide base 302 has a groove on one side close to the right mold mounting seat 303, so that a large gap is formed between the right slide base 302 and the right mold mounting seat 303. The groove is located on the lower side of the right slide base 302. The second adjusting block 3051 is a wedge-shaped block, which is inserted into the gap and in contact with the plane of the groove. One side of the second adjusting block 3051 has an inclined surface, which is in contact with the plane of the semicircular shaft 21. When the second adjusting block 3051 is gradually inserted into the gap between the right slide base 302 and the right mold mounting seat 303, the right mold mounting seat 303 and the second thread rolling plate 304 are driven to deflect upward relative to the right slide base 302 through the rotating shaft 19, and then the upward swing angle of the second thread rolling plate 304 is adjusted, that is, the included angle between the first thread rolling plate 204 and the second thread rolling plate 304 relative to the vertical plane is adjusted. At this time, the right mold mounting seat 303 also rotates relative to the semicircular shaft 21.

[0091] Two guide strips 27 are arranged in the groove of the right slide base 302, which extend along the sliding direction of the second adjusting block 3051. Correspondingly, two guide grooves (not shown in the figure) are formed on the second adjusting block 3051, and the guide strips 27 are in up-down sliding connection with the guide grooves, so as to guide the sliding of the second adjusting block 3051 and prevent the second adjusting block 3051 from deviating.

[0092] The parallelism adjustment of the thread rolling plate is driven and adjusted by an independent servo numerical control motor, which can realize the adjustment of the distance between the inlet end and the outlet end of the mold seat, can realize the adjustment of the thread rolling plate feeding size more digitally, and can more conveniently adjust and control the product processing size such as the outer diameter and the middle diameter.

[0093] As Figure 13As shown, the right mold mounting base 303 also has a mounting groove (not marked in the figure) on the side near the left mold mounting base 203. This mounting groove is located near the top of the right mold mounting base 303, opposite in position to the mounting groove on the left mold mounting base 203. A mold base 206 is also installed in this mounting groove, and the specific installation method is the same as that on the left mold mounting base 203, which will not be described in detail here.

[0094] The second thread rolling plate 304 is pressed and fixed on the mold base 206. A fixing block 22, a side fixing block 23 and a top pressure cylinder 26 are also provided on the side of the right mold mounting base 303. For the specific installation method, please refer to the above description of the left thread rolling mold 2. It will not be described in detail here.

[0095] like Figure 14 As shown, the spacing adjustment mechanism 306 mainly consists of a third adjusting block 3061, a lead screw, a motor mounting base 803, a commutator 2052, and a motor. The third adjusting block 3061 is also a wedge-shaped block, located between the right slide base 302 and the right fixed base 301, and has an inclined surface fit with the right slide base 302. The motor mounting base 803 is fixed to the bottom of the support plate with bolts. The commutator 2052 is fixedly mounted on the motor mounting base 803. The output end of the motor is connected to the input end of the commutator 2052, and the output end of the commutator 2052 is connected to the lead screw. The directions of the input and output ends of the commutator 2052 are perpendicular. The lead screw passes through the support plate and is connected to the third adjusting block 3061 for transmission.

[0096] After the motor's operation is reversed by the commutator 2052, it drives the lead screw to rotate, which in turn drives the third adjusting block 3061 to move up and down. The third adjusting block 3061 presses the right slide table 302 through the inclined surface, causing the right slide table 302 to slide horizontally along the slide rail on the support plate, adjusting the gap between the second thread rolling plate 304 and the first thread rolling plate 204. During the thread rolling process, a compressive force is applied to the blank 34, forming threads on the surface of the blank 34. The gap adjustment mechanism 306 can also adjust the thread depth formed on the surface of the blank 34.

[0097] A guide portion is formed on the side of the third adjusting block 3061 away from the inclined surface. The guide portion extends vertically, and a guide groove is formed on the right fixed seat 301. The guide portion and the guide groove are slidably connected to each other to provide guidance for the vertical sliding of the third adjusting block 3061.

[0098] The adjustment of the distance between the two thread rolling plates, i.e. the adjustment of the thread pitch diameter, is driven by a servo CNC motor. This structure reliably adjusts the distance between the two thread rolling plates digitally and has a self-locking function. After the die holder is adjusted and locked, the die holder will not shift or misalign under extreme pressure.

[0099] In this invention application, the taper adjustment, parallelism adjustment, and spacing adjustment of the thread rolling plate are all independent. Compared with the common traditional thread rolling machine mold base that uses bolts with or without displays to adjust the spacing, parallelism, and taper, CNC control can more conveniently and accurately achieve the required positioning adjustment, and they do not affect each other. It has extremely high repeatability, which makes it convenient to call the original stored processing parameters with one click when processing similar products in the future, and to adjust and lock the position of the mold base by CNC, reducing the difficulty of machine adjustment.

[0100] See Figure 13 , Figure 14 A hydraulic cylinder (not shown in the figure) is installed inside the right fixed seat 301. Correspondingly, through holes are provided on the right slide seat 302 and the right mold mounting seat 303, with a countersunk hole inside the through hole on the right mold mounting seat 303. A vertically extending clearance hole is provided on the third adjusting block 3061 to allow space for the hydraulic cylinder drive rod 28. The hydraulic cylinder drive rod 28 passes sequentially through the third adjusting block 3061, the right slide seat 302, and the right mold mounting seat 303, and is connected to the nut 25. After the parallelism adjustment mechanism 305 completes the angle adjustment of the right mold mounting seat 303 and the second thread rolling plate 304, the hydraulic cylinder drive rod 28 retracts, and the nut 25 on the drive rod 28 retracts into the countersunk hole on the right mold mounting seat 303. The drive rod 28 has a clearance fit with the through holes on the right mold mounting seat 303 and the right slide seat 302. The diameter of the nut 25 is larger than the diameter of the through hole but smaller than the diameter of the countersunk hole. When the drive rod 28 of the hydraulic cylinder retracts, it will tighten the right mold mounting base 303 through the nut 25, so that the right mold mounting base 303 is held and fixed on the right slide table 302. The nut 25 plays a limiting role.

[0101] The first thread rolling plate 204 and the second thread rolling plate 304 have several tooth bodies on opposite sides that are adapted to the shape and helix angle of the thread being processed. The tooth bodies extend along the surface of the first thread rolling plate 204 and the second thread rolling plate 304 and protrude from the surface of the first thread rolling plate 204 and the second thread rolling plate 304 for forming threads on the blank 34.

[0102] The teeth on the first thread rolling plate 204 can correspond one-to-one with the teeth on the second thread rolling plate 304, or they can be spaced apart.

[0103] See Figure 16The first thread rolling plate 204 and the second thread rolling plate 304 are spaced apart to form a processing space. The upper edge and the lower edge of the opposite side of the first thread rolling plate 204 and the second thread rolling plate 304 each have a slope area 3041. Initially, the first thread rolling plate 204 and the second thread rolling plate 304 are vertically staggered, and the slope area 3041 of the upper edge of the second thread rolling plate 304 forms an angle with the first thread rolling plate 204. The billet 34 is placed in the angle, and the slope supports the billet 34 to prevent the billet 34 from falling off. At the same time, the slope helps guide the billet 34 into the processing space of the first thread rolling plate 204 and the second thread rolling plate 304. When the first thread rolling plate 204 and the second thread rolling plate 304 move synchronously and oppositely, the billet 34 will not be lifted upward by the top surface of the second thread rolling plate 304.

[0104] As shown in Figure 12 , the right mold mounting seat 303 is also provided with a pressing positioning mechanism 13 and an axial positioning mechanism 14 on the top, which are respectively used for pressing the billet 34 and positioning the axial direction of the billet 34.

[0105] Referring to Figure 15 , the pressing positioning mechanism 13 mainly includes a bracket 131, a pressing plate 133, a pressing cylinder 132, a lifting screw 134, a clamping part 16, a knob 17, a handle 18 and the like. The lower end of the bracket 131 is fixed on the top of the right mold mounting seat 303 by bolts. The pressing cylinder 132 is vertically arranged, and the output end of the pressing cylinder 132 is connected with the pressing plate 133 to control the lifting of the pressing plate 133. The upper end of the pressing cylinder 132 is connected with a guide rod, which is connected with the upper end of the bracket 131 in an up-down penetrating manner. The lifting screw 134 penetrates through the upper end of the bracket 131 and is threadedly connected with the bracket 131. The lower end of the lifting screw 134 is rotationally connected with the upper end of the cylinder, and the upper end of the lifting screw 134 is connected with the handle 18. The handle 18 is manually rotated to drive the lifting screw 134 to rotate, thereby driving the pressing cylinder 132 to move up and down to adjust the height.

[0106] The clamping part 16 is installed on the top of the bracket 131, and the knob 17 is threadedly connected with the clamping part 16. The upper end of the lifting screw 134 penetrates through the clamping part 16. After the height of the pressing cylinder 132 is adjusted, the knob 17 is screwed to clamp the lifting screw 134 by the clamping part 16 to prevent the lifting screw 134 from rotating again.

[0107] The pressure plate 133 is tilted to one side and then bent downwards, making its shape Z-shaped. The lower end face of the pressure plate 133 is horizontal so that the blank 34 remains horizontal when it is pressed down. During the thread rolling process, the pressing cylinder 132 controls the pressure plate 133 to extend into the processing space. The pressure plate 133 will maintain a certain height and contact the blank 34. When the first thread rolling plate 204 and the second thread rolling plate 304 move synchronously upwards and downwards towards each other, the height of the blank 34 remains unchanged, and the blank 34 itself will rotate relative to the first thread rolling plate 204 and the second thread rolling plate 304.

[0108] See Figure 12 The axial positioning mechanism 14 mainly includes a cylinder and a fixed-length positioning plate 141. The lower end of the fixed-length positioning plate 141 extends into the processing space between the first thread rolling plate 204 and the second thread rolling plate 304. The cylinder is horizontally positioned and fixed to the top of the right mold mounting base 303. The output end of the cylinder is connected to the fixed-length positioning plate 141. The cylinder controls the fixed-length positioning plate 141 to move horizontally along the direction perpendicular to the distance between the first thread rolling plate 204 and the second thread rolling plate 304, with the direction of movement consistent with the axial direction of the blank 34. By adjusting the axial position of the fixed-length positioning plate 141 relative to the blank 34, the length of the thread to be processed on the rod of the blank 34 is adjusted. During thread rolling, the rod of the blank 34 will abut against the fixed-length positioning plate 141.

[0109] like Figure 2 , Figure 3 As shown, a nitrogen-filled load-balance cylinder 30 is installed above the left slide base 202 and the right slide base 302, respectively. The load-balance cylinders 30 are vertically positioned, with the lower ends of their extension rods connected to the tops of the left and right slide bases 202 and 302, respectively, and the upper ends connected to the top of the machine body 1. The two load-balance cylinders 30 are used to balance the weight of the left and right thread-rolling dies 2 and 3. When the left and right thread-rolling dies 2 and 3 move synchronously in opposite directions, the extension rods of the load-balance cylinders 30 automatically extend and retract, reducing the load on the servo motor 801 in the servo drive mechanism 8.

[0110] like Figure 7 As shown, a cooling oil pipe 15 is also provided above the left mold mounting base 203. The top surface of the left mold mounting base 203, near the machining space, has an inclined surface. The outlet of the cooling oil pipe 15 extends to this inclined surface, and the inlet connects to the source of the cooling oil. During thread rolling, the cooling oil sprayed from the cooling oil pipe 15 flows downwards along the inclined surface at the top of the left mold mounting base 203 into the machining space, landing on the blank 34 to cool and lubricate it.

[0111] When the wire drawing process is performed, the first wire drawing plate 204 and the second wire drawing plate 304 will extrude the blank 34, and the left wire drawing die 2 and the right wire drawing die 3 will be subjected to a relatively large reaction force, which will act on the machine body 1, so that the two sides of the machine body 1 have a tendency to open outward. The machine body 1 integrally formed along the integral connection will hold the two sides of the positions where the left wire drawing die 2 and the right wire drawing die 3 of the machine body 1 are located, and the pull rod 29 arranged on the back of the machine body 1 will also hold the left and right sides of the machine body 1, and the two ends of the pull rod 29 are fixedly connected with the two inner walls of the installation space on the machine body 1.

[0112] The structure is reinforced by performing the structure reinforcement at the position where the lateral load is most concentrated in the closed machine body, the pre-tightening pull rod 29 is added, and the weakest position of the mouth-shaped machine body structure is strengthened, so that the entire main machine body realizes extremely strong structural rigidity, and the overall machine body has only a micron-level outward expansion deformation amount under the condition of bearing a 20-ton lateral force.

[0113] As shown in Figure 2 , a rotatable rotary table 7 is arranged on the front side of the machine body 1 (i.e., the side away from the pull rod 29), and one side of the rotary table 7 is horizontally rotationally connected with a rotary shaft seat 31 fixed on the front side of the machine body 1.

[0114] Referring to Figure 17 , two slide rails and an installation plate 71 are arranged on the rotary table 7, and the extension directions of the two slide rails are perpendicular to the spacing direction of the left wire drawing die 2 and the right wire drawing die 3. The bottom of the installation plate 71 is horizontally slidably connected with the two slide rails through slide blocks. The feeding mechanism 4, the feeding mechanism 5 and the heating mechanism 6 are all installed on the installation plate 71, and the positions of the feeding mechanism 4, the feeding mechanism 5 and the heating mechanism 6 can be adjusted by sliding the installation plate 71.

[0115] A centering adjustment mechanism 72 is arranged on the rotary table 7 at the bottom of the installation plate 71. The centering adjustment mechanism 72 is composed of a lead screw, a handle 18, a screw seat and two bearing seats. The two bearing seats are fixedly installed on the rotary table 7 and correspond to the left and right ends of the installation plate 71 respectively. The two ends of the lead screw are rotationally connected with the two bearing seats respectively, the handle 18 is fixedly installed on one end of the lead screw, and the screw seat is fixed on the bottom of the installation plate 71. The lead screw is threadedly connected with the screw seat, and the installation plate 71 can be slid by rotating the handle 18 to drive the lead screw to rotate.

[0116] A digital caliper 73 is arranged on the front side of the rotary table 7. The digital caliper 73 is composed of two parts, i.e., a scale module and a digital module. The scale module is fixed on the front side of the rotary table 7, and the digital module is connected with the bottom of the installation plate 71 through a connecting piece. When the installation plate 71 slides horizontally, the digital module can read the scale on the scale module, so as to obtain the moving distance of the installation plate 71.

[0117] Referring to Figure 17The feeding mechanism 4 mainly comprises a vibrating disc assembly 41, a distributing assembly 42 and a positioning assembly 43, wherein the distributing assembly 42 is connected with the discharging port of the vibrating disc assembly 41, and the positioning assembly 43 is located on the side of the distributing assembly 42 away from the vibrating disc assembly 41 and is connected with the discharging port of the distributing assembly 42.

[0118] The vibrating disc assembly 41 transmits the blank 34 to the distributing assembly 42 in a vibrating manner.

[0119] Referring to Figure 18 The distributing assembly 42 mainly comprises a support frame 421, a fixed support 424, a discharging slide plate 425, a distributing cylinder 426, a distributing plate 427, a first support plate 422, a second support plate 423, a first abutment plate 428 and a second abutment plate 429. The support frame 421 is vertically fixed on the mounting plate 71, the fixed support 424 is fixed on the top of the support frame 421, and the discharging slide plate 425 is fixed on the fixed support 131 in an inclined manner, and the inclined direction is from the side where the vibrating disc assembly 41 is located to the side where the positioning assembly 43 is located.

[0120] The first support plate 422 and the second support plate 423 are respectively fixed on the two sides of the support frame 421 (i.e. the two sides of the length direction of the discharging slide plate 425), the distributing cylinder 426 is located above the discharging slide plate 425 and is fixed on the second support plate 423 in an inclined manner, the distributing plate 427 is connected with the output end of the distributing cylinder 426, and the distributing plate 427 is close to the discharging port of the discharging slide plate 425. When the blank 34 is discharged from the discharging port of the vibrating disc assembly 41, it will fall on the discharging slide plate 425 and roll down along the discharging slide plate 425, and the distributing cylinder 426 controls the distributing plate 427 to move downward to block the discharging port of the discharging slide plate 425 to prevent the blank 34 from rolling down.

[0121] The first abutment plate 428 and the second abutment plate 429 are both fixed on the side of the first support plate 422 close to the discharging slide plate 425, wherein the first abutment plate 428 is located directly above the second abutment plate 429 and is separated by a certain distance. The distance is slightly larger than the diameter of the rod part of the blank 34. A guide area for the blank 34 to fall is formed by the first abutment plate 428, the second abutment plate 429 and the discharging slide plate 425. The head part of the blank 34 will fall to the side of the first abutment plate 428 away from the discharging slide plate 425, the rod part will pass through the gap between the first abutment plate 428 and the second abutment plate 429 and fall on the discharging slide plate 425, and the first abutment plate 428 and the second abutment plate 429 cooperate to limit the blank 34, and then the blank 34 will roll down along the discharging slide plate 425.

[0122] As Figure 19As shown, the positioning assembly 43 mainly comprises a cylinder fixing frame 431, a lifting cylinder 432, a material blocking plate 435, a V-shaped seat 433 and a positioning groove plate 434. The cylinder fixing frame 431 is vertically fixed on the mounting plate 71. The lifting cylinder 432 is a slide plate cylinder, which is vertically fixed on the cylinder fixing frame 431. The V-shaped seat 433 is connected with the output end of the lifting cylinder 432, and has a V-shaped groove on the V-shaped seat 433, so as to adapt to the installation of the positioning groove plate 434. The positioning groove plate 434 has a V-shaped positioning groove in the middle, which is used for positioning the blank 34. The positioning groove is through from front to back. The positioning groove plate 434 is located directly below the blanking port of the blanking slide plate 425. When the blank 34 closest to the blanking port on the blanking slide plate 425 falls on the positioning groove plate 434, the lifting cylinder 432 controls the downward movement of the material distribution plate 427, and the material distribution plate 427 is inserted into the blanking port of the blanking slide plate 425 to block the blank 34 on the blanking slide plate 425, preventing the blank 34 from continuing to roll down.

[0123] The material blocking plate 435 is arranged on the side of the positioning groove plate 434 away from the blanking slide plate 425, and is used for blocking the blank 34 falling on the positioning groove plate 434, preventing the blank 34 from rolling out of the positioning groove plate 434.

[0124] As shown in the drawings, Figure 21 The feeding mechanism 5 mainly comprises a bracket 131, a feeding cylinder 51 and a suction rod 52. The bracket 131 is fixed on the mounting plate 71. The feeding cylinder 51 is used as a pushing driving part, and is used for pushing the blank 34 into the machining space between the first wire drawing plate 204 and the second wire drawing plate 304. The feeding mechanism 5 is horizontally fixed on the bracket 131, and the output end of the feeding cylinder 51 is connected with the suction rod 52, so as to control the forward and backward movement of the suction rod 52. The movement direction of the suction rod 52 is perpendicular to the spacing direction of the first wire drawing plate 204 and the second wire drawing plate 304. By sliding the mounting plate 71, the centering position of the suction rod 52 between the first wire drawing plate 204 and the second wire drawing plate 304 can be adjusted.

[0125] The front end of the suction rod 52 has a suction port capable of generating negative pressure, which is used for sucking the blank 34. The suction rod 52 has a gas passage inside, which is used for being connected with a gas suction mechanism. The gas suction mechanism is used for sucking air outward, so as to generate negative pressure at the suction port. The lifting cylinder 432 controls the upward and downward movement of the positioning groove plate 434, so as to adjust the height of the positioning groove plate 434, so that the blank 34 falling on the positioning groove plate 434 is at the same height as the suction rod 52. According to the different diameters of the blank 34, the height of the positioning groove plate 434 is also different, so as to ensure that the axial height of the blank 34 is consistent with the axial height of the suction rod 52.

[0126] After the blank 34 falls on the positioning groove plate 434, the feeding cylinder 51 controls the suction rod 52 to move, the suction rod 52 will be close to the positioning groove plate 434, and the head of the blank 34 on the positioning groove plate 434 is attracted, the blank 34 is sucked, and then the feeding cylinder 51 continues to control the suction rod 52 to move forward, the suction rod 52 will push the blank 34 out of the positioning groove plate 434.

[0127] As shown in Figure 20 The heating mechanism 6 is located on one side of the positioning assembly 43. The heating mechanism 6 is composed of a chassis 61, a lifting platform 62, a heater 63 and a heating coil 64. The lifting platform 62 is fixed on the chassis 61, and the lifting platform 62 adopts a scissor type lifting structure to control the lifting of the heater 63 and adjust the height of the heating coil 64. The heating coil 64 is connected with the heater 63, and the blank 34 is inductively heated through the heating coil 64.

[0128] The heating coil 64 has a through hole, the axis of the through hole is horizontal, and the axis of the suction rod 52 is located in the same vertical plane. The blank is transmitted into the through hole of the heating coil 64 to inductively heat the blank.

[0129] According to the different diameters of the blank 34, the height of the heating coil 64 is adjusted by the lifting platform 62.

[0130] An infrared temperature measuring instrument (not shown in the figure) or a temperature sensor (not shown in the figure) is also arranged beside the heating coil 64, which is used to measure the temperature of the blank heated in the heating coil 64, and to feed back the temperature of the blank to the heating system in real time, so as to control the heating temperature of the blank.

[0131] The temperature control of the heating system in the embodiment develops into full closed loop digital control, adopts high precision and high feedback speed infrared temperature measuring instrument, and feeds back the heating temperature to the upper computer in time and effectively. The upper computer automatically determines the relationship between the measured feedback temperature and the set temperature. If the feedback temperature does not reach the set temperature, the heating system still maintains the heating state until the feedback temperature reaches the set temperature. Then, according to the corresponding setting, whether to continue to execute the heat preservation or to complete the heating process. If the heat preservation is continued, the heating system will execute the heat preservation program according to the real-time feedback temperature and the set temperature, and control the target measurement temperature in the set temperature range. Compared with the traditional heating furnace or the traditional heating device without feedback control, the control precision of the target heating temperature is obviously improved. Under certain conditions, the temperature control precision can be easily realized to be ±1℃. Whether it is for titanium alloy, high temperature alloy or other materials, the temperature control precision can be easily realized to be very high, and the batch consistency and stability are guaranteed.

[0132] Referring to Figure 21When the suction rod 52 sucks the blank 34, the feeding cylinder 51 pushes the blank 34 into the through hole of the heating coil 64, and the heating coil 64 heats the blank 34. When the blank 34 is heated to a specified temperature, the feeding cylinder 51 continues to push the blank 34 to the inclined area 3041 on the upper side of the second thread rolling plate 304, and one side of the blank 34 abuts against the first thread rolling plate 204. The inclined area 3041 supports the blank 34 and guides the blank 34 into the machining space during thread rolling.

[0133] The feeding mode is simple, and the blank 34 is sequentially pushed into the heating coil 64 and the machining space by the feeding cylinder 51, without the need for excessive turnover. The feeding speed is fast, and the cost is low.

[0134] Since the existing warm thread rolling machine heating coil is installed in the middle of the linear feeding track, the workpiece still needs to slide on the track for a period of time after heating. During this sliding process, the workpiece will lose a lot of heat. In addition, since the heating coil is arranged in a straight line, it cannot uniformly heat the circumference of the workpiece like a circular coil. Moreover, since the workpiece is always moving during heating, the heating temperature of the workpiece cannot be effectively and reliably controlled. In view of this feature, the heating coil 64 is arranged at the end of the linear feeding track, and a circular coil is used to heat the single blank 34 one by one. Although this may slightly reduce the processing efficiency, it can achieve digital and effective control of the heating temperature of single products and ensure the uniformity and consistency of the heating temperature of the blank 34.

[0135] As shown in Figure 1 , Figure 17 , the turntable 7 can be deflected to one side of the fuselage 1 to make room for maintenance and repair of the device. The other side of the turntable 7 (i.e., the side away from the rotation axis) is provided with a locking mechanism 9 for locking the turntable 7 and the fuselage 1 to prevent displacement during feeding and feeding, affecting the accuracy of feeding.

[0136] Referring to Figure 22 , the locking mechanism 9 is composed of a first fixing member 91, a second fixing member 92 and a third fixing member 93. The first fixing member 91 is vertically arranged, the upper end of the first fixing member 91 is fixed on the turntable 7 by bolts, and the lower end is connected with the second fixing member 92 by bolts. The second fixing member 92 is horizontally arranged. One side of the third fixing member 93 is fixed on the fuselage 1 by bolts. The bolt hole on the third fixing member 93 is a waist-shaped hole, which extends upward and downward to adjust the height of the third fixing member 93.

[0137] The bottom of the second fixing part 92 is provided with a stop part 921, and the lower side of the third fixing part 93 is provided with a connecting part 931. When the second fixing part 92 is overlapped on the connecting part 931 of the third fixing part 93, the connecting part 931 will abut against the stop part 921, thereby playing a role of stopping.

[0138] The upper surface of the connecting part 931 is provided with an inclined surface. When the rotary table 7 is rotated to move to a working position, the second fixing part 92 will slide along the inclined surface of the connecting part 931 of the third fixing part 93, and one end of the second fixing part 92 will be overlapped on the connecting part 931 of the third fixing part 93, so that the second fixing part 92 and the third fixing part 93 can abut against each other. The upper surface of the connecting part 931 is slightly higher than the bottom surface of the second fixing part 92, so as to pre-tighten the second fixing part 92, prevent a gap between the second fixing part 92 and the third fixing part 93, and prevent the second fixing part 92 from moving up and down. Then, the second fixing part 92 and the third fixing part 93 can be fixed by using bolts.

[0139] When the rotary table 7 needs to be moved, the bolts at the connecting position of the second fixing part 92 and the third fixing part 93 are removed, and then the rotary table 7 can be moved.

[0140] The slide seat system of the thread rolling machine adopts a vertical layout design. When processing, the two bed tables 10 vertically move up and down. Therefore, the automatic feeding system adopts a horizontal discharging design. A servo cylinder is used to horizontally push the blank 34 into the heating coil 64. After heating, the blank 34 is continuously pushed into the processing area to complete subsequent clamping and processing. After the product is finished rolling, the product falls into the sorting device below the slide seat due to the action of its own gravity. According to the feedback signal of the pressure process measuring sensor installed in the die seat, the sorting device completes the screening of qualified products and unqualified products through the judgment of the numerical control system.

[0141] As shown in Figure 3 , a certain space is left below the two bed tables 10 for preventing the oil return groove 11, so as to collect the cooling oil. The cooling oil will drop downwardly into the oil return groove 11.

[0142] As shown in Figure 1 , Figure 23 and Figure 24 , a distributing mechanism 12 is further arranged below the processing space formed between the first thread rolling plate 204 and the second thread rolling plate 304. The distributing mechanism 12 includes a distributing hopper 121 with two discharge ports, a distributing baffle 123 for guiding the qualified products and the unqualified products to enter the two discharge ports respectively, a rotating cylinder 122 for controlling the rotation of the distributing baffle 123, and the like. The space in the distributing hopper 121 has two layers, which are separated by a partition plate 1211. The partition plate 1211 is arranged to be inclined and extends to the positions of the two discharge ports.

[0143] The partition 1211 is provided with a plurality of small holes, and the finished bolt is provided with a certain amount of cooling oil, so that when the bolt falls on the partition 1211, the cooling oil will fall into the space below the partition 1211 and be collected. The rotating cylinder 122 controls the rotation of the distribution baffle 123 to guide the qualified products and unqualified products into two discharge ports for screening the bolts.

[0144] The bottom of the distribution hopper 121 is provided with a pipeline 124 to discharge the collected cooling oil in the distribution hopper 121.

[0145] The stress sensor (not shown in the figure) is arranged in the left or right thread rolling die 2 or 3, and the stress sensor can detect the rolling force when the blank 34 is extruded and rolled, and when the rolling force on a certain blank 34 exceeds the set size, it means that a blank 34 of different diameter is mixed, that is, the blank 34 is unqualified, otherwise it is qualified. Then the first thread rolling plate 204 and the second thread rolling plate 304 loosen the blank 34, and the blank 34 directly falls into the distribution hopper 121.

[0146] Referring to Figure 17 The receiving oil tank 32 is arranged at the bottom of the turntable 7 and is fixed to the bottom of the turntable 7 by a connecting piece. Two boxes 33 are arranged in the receiving oil tank 32, and the two boxes 33 correspond to the two discharge ports of the distribution hopper 121 respectively and are used to collect the qualified products and unqualified products respectively. The bottom surface of the box 33 is provided with a plurality of small holes, so that the residual cooling oil on the surface of the bolt can pass through the small holes and fall into the receiving oil tank 32.

[0147] When the box 33 is filled with materials, the connection between the turntable 7 and the machine body 1 is unlocked, the turntable 7 is rotated to one side, and the box 33 is replaced, which is convenient and fast.

[0148] The control cabinet and the numerical control screen (not shown in the figure) are further arranged on the outside of the machine body, so as to digitally control the thread rolling machine. The numerical control system can control the distance and parallelism between the left and right beds of the thread rolling machine, the thread rolling plate and the position of each moving part to micron level, and can also control the heating device and the automatic system. All components are integrated into the numerical control system for centralized control and data transmission processing, which improves the feedback and response time and enhances the stability of the control. At the same time, due to the high integration of the numerical control system, the numerical control system can monitor and feedback each bed, thread rolling plate and other running parts, so as to realize online monitoring of the whole machining process.

[0149] The above technical scheme only embodies the preferred technical scheme of the present application, and some changes made by the person skilled in the art to some parts of the present application also embody the principle of the present application and are within the protection scope of the present application.

Claims

1. A thread rolling machine facilitating feeding, characterized in that, The utility model relates to a wire drawing machine, including: First wire drawing plate (204) and second wire drawing plate (304), first wire drawing plate (204) and second wire drawing plate (304) are oppositely arranged and can be moved up and down, and the processing space is formed between first wire drawing plate (204) and second wire drawing plate (304), and the inclined area (3041) is arranged on first wire drawing plate (204) or second wire drawing plate (304), the inclined area (3041) is arranged at the one end of first wire drawing plate (204) and second wire drawing plate (304) relative to the wire drawing starting state, and the included angle for supporting the blank (34) is formed between the upper inclined area (3041) of first wire drawing plate (204) and the lower edge of second wire drawing plate (304) or between the upper inclined area (3041) of second wire drawing plate (304) and the lower edge of first wire drawing plate (204); Feeding mechanism (4) is used for conveying the blank (34) to the designated position; The heating mechanism (6) includes a heating coil (64) having a through hole; The feeding mechanism (5) includes a suction rod (52) and a push driving element for controlling the horizontal movement of the suction rod (52), the front end of the suction rod (52) has a suction port capable of generating negative pressure, the suction rod (52) can be horizontally moved to the discharge port of the feeding mechanism (4) to suck the blank (34), and after the blank (34) is pushed into the through hole and heated by the heating coil (64), it is pushed into the included angle formed between the first wire drawing plate (204) and the second wire drawing plate (304).

2. The thread rolling machine of claim 1, wherein, The feeding mechanism (4) includes a vibrating disc assembly (41), a distributing assembly (42) and a positioning assembly (43), the distributing assembly (42) includes a support frame (421), a fixed support (424) mounted at the top end of the support frame (421), a discharging slide plate (425) obliquely arranged on the fixed support (424), a distributing cylinder (426) arranged above the discharging slide plate (425), and a distributing plate (427) connected to the output end of the distributing cylinder (426), the upper end of the discharging slide plate (425) is opposite to the discharge port of the vibrating disc assembly (41), and the positioning assembly (43) is arranged at the discharge port of the discharging slide plate (425).

3. The wire drawing machine facilitating loading as claimed in claim 2 wherein, The first supporting plate (422) and the second supporting plate (423) are arranged on the two sides of the support frame (421) respectively, the distributing cylinder (426) is obliquely fixed on the second supporting plate (423) and located above the discharge port of the discharging slide plate (425), the first abutting plate (428) and the second abutting plate (429) are arranged on the side of the first supporting plate (422) close to the discharging slide plate (425), the second abutting plate (429) is located above the first abutting plate (428), and the guide area for limiting the head of the blank (34) is formed between the first abutting plate (428), the second abutting plate (429) and the discharging slide plate (425).

4. The stranding machine of claim 2, wherein, The positioning assembly (43) comprises a cylinder fixing frame (431), a lifting cylinder (432) vertically arranged on the cylinder fixing frame (431), a V-shaped seat (433) connected with the output end of the lifting cylinder (432), a positioning groove plate (434) arranged on the V-shaped seat (433), and a material blocking plate (435) arranged on the positioning groove plate (434), wherein the positioning groove plate (434) is provided with a positioning groove for positioning the blank (34), and the material blocking plate (435) is located on the side of the positioning groove away from the blanking slide plate (425), and the extension direction of the positioning groove is consistent with the moving direction of the suction rod (52).

5. The stranding machine of claim 1, wherein, The heating mechanism (6) further comprises a heater (63) and a lifting table (62) for controlling the lifting of the heater (63), and the heating coil (64) is mounted on the heater (63), and the axis of the through hole on the heating coil (64) and the axis of the suction rod (52) are located in the same vertical plane.

6. The stranding machine of claim 1, wherein, Further comprising: The machine tool is integrally cast into a shape, and the middle of the machine tool has a front-to-back through mounting space, and the first wire twisting plate (204) and the second wire twisting plate (304) are respectively located on the two sides of the mounting space; The turntable (7) can rotate around one side of the machine tool, and the feeding mechanism (4), the feeding mechanism (5) and the heating mechanism (6) are arranged on the turntable (7), and the other side of the turntable (7) is provided with a locking mechanism (9) for locking the turntable (7).

7. The stranding machine of claim 6, wherein, The locking mechanism (9) comprises a first fixing member (91), a second fixing member (92) and a third fixing member (93), the first fixing member (91) is vertically arranged, the upper end of the first fixing member (91) is fixed on the turntable (7), the lower end is connected with the second fixing member (92), the third fixing member (93) is mounted on the machine tool, and the other end of the second fixing member (92) is detachably connected with the third fixing member (93).

8. The stranding machine of claim 7, wherein, The lower side of the third fixing member (93) is horizontally outwardly protruded to form a connecting portion (931), the bottom of the second fixing member (92) is downwardly protruded to form a stop portion (921), the second fixing member (92) can be lapped on the third fixing member (93), and the connecting portion (931) of the third fixing member (93) can abut against the stop portion (921), and the second fixing member (92) is fixed by bolts.

9. The stranding machine of claim 6, wherein, The turntable (7) is provided with a slidable mounting plate (71) and a centering adjusting mechanism (72), the mounting plate (71) can move along the spacing direction of the left wire twisting die (2) and the right wire twisting die (3), the centering adjusting mechanism (72) comprises a screw rod horizontally rotatably connected with the turntable (7) and a handle connected with one end of the screw rod, the screw rod is in transmission connection with a screw rod (802) seat fixed on the bottom of the mounting plate (71), and the feeding mechanism (4), the feeding mechanism (5) and the heating mechanism (6) are arranged on the mounting plate (71).

10. The stranding machine of claim 9, wherein, One side of the rotating table (7) is provided with a digital caliper (73) for detecting the moving distance of the mounting plate (71).

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