CN116748445A

CN116748445A - Cold header

Info

Publication number: CN116748445A
Application number: CN202310642222.2A
Authority: CN
Inventors: 付胜刚; 牟联满
Original assignee: Guangdong Taiji Technology Co ltd
Current assignee: Guangdong Taiji Technology Co ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-09-15

Abstract

The invention relates to the technical field of cold heading machines, and particularly discloses a cold heading machine. The cold header comprises a lathe bed, wherein a feeding unit, a blanking unit, a transmission unit, a main sliding table in sliding connection and a main die box in fixed connection are installed on the lathe bed, the transmission unit is used for driving the main sliding table which is in sliding connection on the lathe bed to slide, the main die box is arranged opposite to the main sliding table, and when the transmission unit drives the main sliding table to slide back and forth on the lathe bed, the cut bar between the main sliding table and the main die box is subjected to cold header. The transmission unit comprises a first connecting rod, a second connecting rod and a pushing connecting rod, wherein the first connecting rod, the second connecting rod and the pushing connecting rod form a Y-shaped or a Y-shaped structure, when the main crankshaft rotates, the front die arranged on the main sliding table can be used for cold heading bars for a longer time, and the qualification rate of the bars is improved.

Description

Cold header

Technical Field

The invention relates to the field of cold heading machines, in particular to a cold heading machine.

Background

A cold header is a press working machine in machine manufacturing for forming a raw material into a desired shape without any change. When the cold header is used for cold-upsetting the bar, the cold-upsetting time, namely the time for extruding the bar by the die, is as much as possible in a factory so as to ensure that the sizes of parts produced in the same batch are relatively uniform.

A cold header forward-feed device as disclosed in the publication CN 215697700U has a common cold header drive device. The transmission device comprises an input motor, a crankshaft and a pushing connecting rod rotationally connected to the crankshaft, wherein the crankshaft rotates to drive the pushing connecting rod to push the slipway seat to move left and right, so that a die arranged on the slipway seat punches cut bars, and the bars are formed into a required shape. However, when the transmission unit is used for carrying out cold heading on the bar stock, the residence time of the sliding table at the position close to the bar stock is short, the extrusion time of the bar stock is short, certain difference exists in the sizes of parts such as bolts or nuts produced in the same batch, and the quality of the parts in the same batch is difficult to control.

Accordingly, the prior art is still in need of improvement and development.

Disclosure of Invention

The invention discloses a cold header, which is used for solving the problem that the quality of bars in the same batch is different in the cold header process.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a cold header comprising:

a bed body;

the feeding unit is arranged on the lathe bed and is used for conveying bar stocks;

a blanking unit which is arranged on the lathe bed and used for cutting off the bar stock which is conveyed into the lathe bed by the feeding unit,

The main sliding table is connected to the lathe bed in a sliding way, the main die box is fixedly connected to the lathe bed,

a transmission unit comprising:

the main crank shaft is rotationally connected on the lathe bed and is in transmission connection with an external motor,

one end of the first connecting rod is rotationally connected with the eccentric part of the main crankshaft;

the first connecting shaft is fixedly connected to the lathe bed;

the second connecting rod is arranged above the first connecting rod, and one end of the second connecting rod is rotationally connected with the first connecting shaft;

the other end of the first connecting rod is rotationally connected with the second connecting shaft, and the other end of the second connecting rod is rotationally connected with the second connecting shaft; and

the pushing connecting rod is used for pushing the main sliding table to slide relative to the lathe bed, and the main sliding table is used for approaching the main die box to perform cold heading on the bar stock;

and the clamping unit is arranged on the lathe bed and is used for clamping the bar stock to different stations.

Preferably, when the second connecting shaft is located below the first connecting shaft, the first connecting rod, the second connecting rod and the pushing connecting rod form a Y-shaped structure.

Preferably, when the second connecting shaft is located above the first connecting shaft, the first connecting rod, the second connecting rod and the pushing connecting rod form a 'U' -shaped structure.

Preferably, the clamping unit includes:

the through crankshaft is rotationally connected to the lathe bed and is in transmission connection with the main crankshaft;

the transmission long shaft is rotationally connected to the lathe bed and is in transmission connection with the through crankshaft, and the transmission long shaft is provided with a clamping seat rocker arm cam;

the overturning clamp assembly is arranged on the lathe bed and used for clamping bars;

one end of the clamp connecting rod is connected with the turnover clamp assembly;

the middle part of the clamping seat rocker arm is rotationally connected with the lathe bed, one end of the clamping seat rocker arm is in butt joint with the clamping seat rocker arm cam, and the other end of the clamping seat rocker arm is rotationally connected with the other end of the clamp connecting rod.

Preferably, the feeding unit includes:

the mounting seat is mounted on the lathe bed and is provided with a first mounting hole and a first limiting hole, and the first mounting hole is positioned right below the first limiting hole;

the driving structure comprises a driving gear, a first rotating shaft and a first feeding wheel, wherein the driving gear and the first feeding wheel are coaxially and fixedly connected to the first rotating shaft, and the first rotating shaft is rotatably arranged in the first mounting hole;

The first driven driving structure comprises a first driven gear, a second rotating shaft, a first mounting box and a second feeding wheel, wherein the second rotating shaft is in rotating connection with the first mounting box, the first mounting box penetrates through the first limiting hole, the first mounting box is in sliding connection with the mounting seat, the first driven gear and the second feeding wheel are coaxially and fixedly connected to two ends of the second rotating shaft, the first driven gear is meshed with the driving gear, and the first feeding wheel and the second feeding wheel are matched for conveying bar stocks;

one end of the first supporting rod is fixedly connected with the mounting seat, and the other end of the first supporting rod is rotationally connected with the first mounting box;

the first air cylinder is arranged on the mounting seat and used for driving the first mounting box to rotate around the first supporting rod, so that the driving gear is separated from the first driven gear;

keep off work or material rest and controller, keep off the work or material rest setting on the route of bar motion, keep off the work or material rest and be used for adjusting the length of feeding the bar, be provided with pressure sensor on keeping off the work or material rest, first cylinder pressure sensor with controller communication connection.

Preferably, the blanking unit comprises:

the two lugs are fixedly connected to one side of the lathe bed, the two lugs are oppositely arranged, coaxial circular through holes are formed in the opposite sides of the two lugs, and copper sleeves are arranged in the through holes;

a cutter structure disposed between two of the lugs;

the cutter round rod is connected in the copper sleeve in a sliding way and used for driving the cutter structure to approach and cut off the bar stock;

the first elastic piece is arranged on the lathe bed and is used for driving the cutter structure to be far away from the bar stock;

one end of the cutter connecting rod is eccentrically and rotatably connected to the main crankshaft, and the other end of the cutter connecting rod is rotatably connected with the cutter round rod.

Preferably, the cold header further comprises a first liftout unit, and the first liftout unit comprises:

the middle part of the first ejection rocker arm is rotationally connected to the lathe bed;

one end of the ejection connecting rod is eccentrically and rotatably connected to the through crankshaft, and the other end of the ejection connecting rod is rotatably connected with the first ejection rocker arm;

the plurality of liftout mounting plates are arranged at the top of the liftout rocker arm at intervals;

the ejector rod bolts are correspondingly arranged on the ejector material mounting plate one by one; and

The ejector rod is connected in the main die box in a sliding way and is used for being driven by the ejector rod bolt to eject materials.

Preferably, the cold header further comprises a second liftout unit, the second liftout unit comprises:

the middle part of the second material ejection rocker arm is rotationally connected to the lathe bed;

the ejection rod is in sliding connection in the main die box, one end of the ejection rod is in rotary connection with one end of the second ejection rocker arm, and the second ejection rocker arm is used for driving the ejection rod to reciprocate;

the ejection pin is connected in the main die box in a sliding manner, the ejection die is used for ejecting materials, one end of the ejection pin is abutted with the ejection die, and the other end of the ejection pin is abutted with the ejection rod;

and the ejection driving structure is in transmission connection with the transmission long shaft and is used for driving the ejection rocker arm to swing in a reciprocating manner.

Preferably, the transmission unit further comprises a front exit structure comprising:

the front leading-out pressing plate is rotationally connected to the main sliding table;

the front through cam is detachably arranged on the pushing connecting rod;

the front through-out rocker arm is rotationally connected to the main sliding table and is arranged below the front through-out pressing plate;

The material punching rod is in the main sliding table in a sliding mode, the front passing-out cam is connected with the front passing-out pressing plate in a butt mode, the front passing-out cam is used for driving the front passing-out pressing plate to rotate, the front passing-out pressing plate is connected with the front passing-out rocker arm in a butt mode, the front passing-out pressing plate is used for driving the front passing-out rocker arm to rotate, the front passing-out rocker arm is used for driving the material punching rod to move, and the material punching rod is used for driving the front die to punch a workpiece.

Preferably, the transmission unit further comprises a main slipway spring rod, the main slipway spring rod is installed on the lathe bed, and one end of the main slipway spring rod is fixedly connected with the main slipway.

Preferably, the transmission unit further comprises a limiting structure, the limiting structure comprises a fixed side plate, an adjusting side plate and an adjusting screw, the fixed side plate is in butt joint with the adjusting side plate respectively on two sides of the main sliding table, the adjusting screw is in threaded connection with the lathe bed, and the adjusting screw penetrates through the lathe bed to be in butt joint with the adjusting side plate.

Preferably, the feeding unit further comprises:

one end of the feeding rocker arm is eccentrically and rotatably connected to the through crankshaft,

the swing arm is arranged on one side of the mounting seat and is used for being driven by the feeding rocker arm to swing left and right;

The one-way bearing is arranged at one end of the first rotating shaft, the inner ring of the one-way bearing is connected with the key groove of the outer wall of the first rotating shaft, and the outer ring of the one-way bearing is fixedly connected with the swing arm.

Preferably, the first strut is adjacent to the first driven gear, and the first cylinder is adjacent to the second feed wheel.

Preferably, the feeding unit further comprises a first pressure spring, the first pressure spring is close to the second feeding wheel, one end of the first pressure spring is installed on the installation seat, and the other end of the first pressure spring is installed at the bottom of the first installation box.

Preferably, the mounting seat is provided with a second mounting hole and a second limiting hole, the second mounting hole is arranged on one side of the first mounting hole, the second limiting hole is arranged right above the second mounting hole, and the feeding unit further comprises:

the second driven driving structure comprises a second driven gear, a third rotating shaft and a third feeding wheel, the third rotating shaft is rotatably arranged in the second mounting hole, and the second driven gear and the third feeding wheel are coaxially and fixedly connected to two ends of the third rotating shaft;

the third driven driving structure comprises a third driven gear, a fourth rotating shaft and a fourth feeding wheel, the fourth rotating shaft is arranged in the second limiting hole, and the third driven gear and the third feeding wheel are coaxially and fixedly connected to two ends of the fourth rotating shaft;

The transmission gear is rotationally connected to the mounting seat and arranged between the driving gear and the second driven gear, and the transmission gear is respectively meshed with the driving gear and the second driven gear.

Preferably, the third driven driving structure further comprises a second mounting box, and the feeding unit further comprises a second supporting rod and a second air cylinder;

the fourth pivot with the second installation box rotates and links, the second installation box passes the second spacing hole, the second installation box with mount pad sliding connection, the one end of second branch with mount pad fixed connection, the other end with the second installation box rotates to be connected, the second cylinder is installed on the mount pad, the second cylinder is used for the drive the second installation box winds the second branch rotates, makes the second driven gear with the separation of third driven gear.

Preferably, the second strut is close to the third driven gear, and the second cylinder is close to the fourth feed wheel.

Preferably, the feeding unit further comprises a second pressure spring, the second pressure spring is close to the fourth feeding wheel, one end of the second pressure spring is abutted to the mounting seat, and the other end of the second pressure spring is abutted to the bottom of the second mounting box.

Preferably, the cutter structure comprises a cutter seat and a cutter head, wherein the cutter head penetrates through the side wall of the lathe bed and is in sliding connection with the lathe bed, and the cutter seat is abutted with the cutter round rod.

Preferably, the cutter round bar is provided with a first plane and a second plane, the distance between the first plane and the axis of the round bar is larger than the distance between the second plane and the axis of the round bar, a cutting surface is arranged between the first plane and the second plane, and the cutting surface is used for being abutted to the cutter holder.

Preferably, the cutter structure further comprises an eccentric adjusting shaft, the eccentric adjusting shaft is in threaded connection with the cutter holder, the eccentric adjusting shaft comprises a shaft body and an eccentric portion, and the eccentric portion is used for being abutted to the cutter round rod.

Preferably, the first ejector unit further comprises an ejector tube bottom plate and an ejector tube, the ejector tube bottom plate is mounted on the lathe bed, the ejector tube is in threaded connection with the ejector tube bottom plate, and the ejector rod is in sliding connection with the ejector tube.

Preferably, a second elastic piece is arranged in the ejector tube and used for driving the ejector rod to move towards the ejector rod bolt.

Preferably, the ejector driving structure includes:

the transmission vertical shaft is rotationally connected to the lathe bed and is in transmission connection with the transmission long shaft;

the cam shaft is rotationally connected to the lathe bed and is in transmission connection with the transmission vertical shaft, a material ejection cam is installed on the cam shaft and is in butt joint with the material ejection rocker arm, and the material ejection cam is used for driving the material ejection rocker arm to swing in a reciprocating mode.

Preferably, the second ejector unit further comprises:

the ejection rocker arm seat is arranged on the lathe bed;

the driving block is rotationally connected to the liftout rocker arm seat;

the connecting plate is arranged between the material ejection rocker arm and the driving block, one end of the connecting plate is rotationally connected with the driving block, the other end of the connecting plate is rotationally connected with one end of the material ejection rocker arm, the driving block is in butt joint with the material ejection cam, and the material ejection cam is used for driving the driving block to swing.

Preferably, the second ejector unit further comprises a second elastic piece, the second elastic piece is installed in the main die box, one end of the second elastic piece is abutted to the main die box, and the other end of the second elastic piece is abutted to the ejector die.

Preferably, the clamping unit further comprises a clamping seat rocker arm spring rod, one end of the clamping seat rocker arm spring rod is installed on the lathe bed, and the other end of the clamping seat rocker arm spring rod is in butt joint with the upper portion of the clamping seat rocker arm.

Compared with the prior art, the invention has the beneficial effects that:

in the cold header provided by the invention, one end of the first connecting rod in the transmission unit is eccentrically and rotationally connected with the main crankshaft, the second connecting rod is arranged above or below the first connecting rod and is rotationally connected with the first connecting shaft fixed on the header, the other ends of the first connecting rod and the second connecting rod are both rotationally connected on the second connecting shaft, one end of the pushing connecting rod is rotationally connected with the second connecting shaft, and the other end of the pushing connecting rod is rotationally connected with the main slipway, so that the pushing connecting rod can drive the main slipway to move left and right in the rotation process of the first connecting rod, and further the cold header of bar stock is realized. Meanwhile, when the structure is used for stamping the bar stock, the time that the bar stock stays in the direction close to the bar stock by the main sliding table is longer, the time that the bar stock is extruded is longer, and then the bar stock can keep higher uniformity after cold heading, and the product quality is improved.

Drawings

Fig. 1 is a schematic structural diagram of a cold header according to a first view angle provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a cold header according to a second view angle provided by an embodiment of the present invention;

FIG. 3 is a schematic view of a first view angle of the cold header according to an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating a structure of a cold header according to a second view angle of the cold header according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a transmission unit according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a transmission unit according to an embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating a first state of a transmission unit according to an embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating a second state of the transmission unit according to an embodiment of the present invention;

FIG. 9 is a schematic diagram illustrating a third state of the transmission unit according to an embodiment of the present invention;

FIG. 10 is a schematic diagram illustrating a fourth state of the transmission unit according to an embodiment of the present invention;

FIG. 11 is a schematic cross-sectional view of a transmission unit according to an embodiment of the invention;

FIG. 12 is a schematic cross-sectional view of a transmission unit according to an embodiment of the present invention;

FIG. 13 is a schematic view of a first structure of a transmission unit according to an embodiment of the present invention during cold heading;

FIG. 14 is a schematic view of a second structure of a transmission unit according to an embodiment of the present invention during cold heading;

FIG. 15 is a first schematic construction of a prior art transmission unit operation;

FIG. 16 is a second schematic construction of a prior art transmission unit operation;

FIG. 17 is a schematic view of a first cold-heading arc angle according to an embodiment of the present invention;

FIG. 18 is a schematic diagram of a second cold-heading arc angle according to an embodiment of the present invention;

FIG. 19 is a schematic view of a transmission unit according to another embodiment of the present invention;

FIG. 20 is a schematic diagram of a connection structure between a feeding unit and a main crankshaft according to an embodiment of the present invention;

FIG. 21 is a schematic diagram of a first view of a feeding unit according to an embodiment of the present invention;

FIG. 22 is a schematic diagram illustrating a second view of a feeding unit according to an embodiment of the present invention;

FIG. 23 is an exploded view of a feeder unit according to an embodiment of the present invention;

FIG. 24 is a schematic diagram showing a feeding state of a feeding unit according to an embodiment of the present invention;

FIG. 25 is a schematic view of a feeding unit according to an embodiment of the present invention;

fig. 26 is a schematic structural diagram of a third driven driving structure according to an embodiment of the present invention;

FIG. 27 is an enlarged view showing the structure of a portion of the blanking unit mounted on the bed in an embodiment of the present invention;

fig. 28 is a first schematic structural view of a blanking unit according to an embodiment of the present invention;

fig. 29 is a second schematic structural view of a blanking unit according to an embodiment of the present invention;

FIG. 30 is a schematic view of an eccentric adjusting shaft according to an embodiment of the present invention;

FIG. 31 is an exploded view of an eccentric adjustment shaft according to an embodiment of the present invention;

fig. 32 is a schematic structural diagram of a first view angle of a clamping unit and a second ejector unit according to an embodiment of the present invention;

FIG. 33 is a schematic diagram illustrating a second view angle of the clamping unit and the second ejector unit according to an embodiment of the present invention;

fig. 34 is a schematic structural diagram of a second ejector unit according to an embodiment of the present invention;

FIG. 35 is a schematic structural view of a first ejector structure according to an embodiment of the present invention;

fig. 36 is an enlarged view of the a portion structure in fig. 35;

FIG. 37 is a cross-sectional view of a ejector connecting rod according to one embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The technical scheme of the invention will be further described with reference to the examples and the accompanying drawings.

Examples

The cold header is a stamping machine in the mechanical manufacturing and is used for forming the annealed bar with low hardness into a required shape on the basis of not changing any way.

During production, the cold header cuts off the bar stock and conveys it to a processing station. At the moment, the main sliding table provided with the die is driven to move through the transmission device, and the die is driven to move through the sliding of the main sliding table so as to realize the stamping of the bar stock. Referring to fig. 15 and 13, a prior art cold header transmission is shown in a cold header forward feed-out apparatus as disclosed in publication CN 215697700U, and includes an input motor, a crankshaft a, and a pusher rod b rotatably coupled to the crankshaft a. The input motor is in transmission connection with the crankshaft a, the input motor is used for driving the crankshaft a to rotate, the crankshaft a is in rotation connection with the lathe bed, and the pushing rod b is used for pushing the sliding table c in sliding connection with the lathe bed to move left and right. The pushing rod b is eccentrically and rotatably connected to the crankshaft a, and when the crankshaft a rotates, one end of the pushing rod b connected to the crankshaft a performs a circular motion around the rotation axis of the crankshaft a, as shown in fig. 15 and 16, and at this time, the sliding table c connected to the other end of the pushing rod b can slide in the left-right direction compared with the lathe bed.

It should be noted that, in order to facilitate understanding of the rotation angle of the crankshaft a, neither the input motor nor the bed is shown in fig. 15 and 16.

In contrast to fig. 15 and 16, during rotation of the crankshaft a, the prior art crankshaft a rotates from the position shown in fig. 15 to the position shown in fig. 16, and during clockwise rotation of the crankshaft a, fig. 15 and 16 show two critical positions during rotation of the crankshaft a, and when the crankshaft a rotates to a position between fig. 15 and 16, the die begins to cold-heading the bar stock. That is, when the crankshaft a rotates to the position of fig. 15, the pushing rod b pushes the sliding table c to move until the die mounted on the sliding table c is just abutted against the bar, the die completes the stamping of the bar during the clockwise rotation of the crankshaft a (during the rotation of the crankshaft a from the position of fig. 15 to the position of fig. 16), and the die is just abutted against the bar as shown in fig. 16.

The angle of rotation of the crankshaft a from the position of fig. 15 to the position of fig. 16 is α1, and when the position of the crankshaft a falls within this angle, the dies on the slide table c cold-heading the bar. And when the position of the crankshaft a is beyond the angle, the die on the sliding table c is far away from the bar stock, and the name of alpha 1 is the first cold heading radian angle of the cold header.

The application discloses a cold header, which comprises a lathe bed 100, wherein a feeding unit 400 is arranged on the lathe bed 100, the feeding unit 400 is used for conveying bars into the lathe bed 100, a blanking unit 500 is arranged at the downstream of the feeding unit 400, the blanking unit 500 is also arranged on the lathe bed 100, and the blanking unit 500 is used for cutting the bars fed into the lathe bed 100 by the feeding unit 400. The lathe bed 100 is further provided with a transmission unit 200, a main sliding table in sliding connection and a main die box 900 in fixed connection, the transmission unit 200 is used for driving the main sliding table in sliding connection on the lathe bed 100 to slide, a front die 320 is arranged on the main sliding table, the main die box 900 is arranged opposite to the main sliding table, and when the transmission unit 200 drives the main sliding table to slide back and forth on the lathe bed 100, the cut bar between the main sliding table and the main die box 900 is subjected to cold heading. The lathe bed 100 is further provided with a clamping unit 600, when the bar is cut off, the clamping unit 600 clamps the bar between the main sliding table and the main die box 900, and after cold heading is completed, the clamping unit 600 clamps the bar which is not cold headed between the main sliding table and the main die box 900 again after the cold headed bar is clamped out from the main sliding table and the main die box 900.

Specifically, when a plurality of processing stations are provided on the main mold box 900, the clamping unit 600 sequentially clamps the bar from one station to another.

Referring to fig. 5, the transmission unit 200 of the present disclosure includes a main crankshaft 210, the main crankshaft 210 is adapted to be in transmission connection with a motor, and a first connecting rod 220 is rotatably connected to an eccentric portion of the main crankshaft 210. One end of the first connecting rod 220 is rotatably connected to the main crankshaft 210, and the other end is rotatably connected to one end of the second connecting rod 240. The connection part of the first link 220 and the second link 240 is also rotatably connected with a third link 260, one end of the third link 260 is rotatably connected with the other end of the first link 220, and the other end of the third link 260 is rotatably connected with the main sliding table 300.

Referring to fig. 5 to 8, when the main crankshaft 210 connected to the motor is rotated, the first connecting rod 220 having one end rotatably connected to the main crankshaft 210 rotates as demonstrated in fig. 5 to 8, and thus the first connecting rod 220 drives the third connecting rod 260 to move, and the third connecting rod 260 drives the main sliding table 300 to reciprocate left and right, so as to realize cold heading of the bar stock.

As shown in fig. 5 to 8, the first link 220, the second link 240 and the third link 260 constitute a "Y" shaped toggle link driving structure. Setting the initial position of the transmission unit 200 in fig. 5, when the main crankshaft 210 rotates clockwise, the main crankshaft 210 is reset to the position of fig. 5 again after the main crankshaft 210 rotates sequentially from the position of fig. 5 to the positions of fig. 6, 7 and 8.

Referring to fig. 5 to 8, the main crankshaft 210 drives the main sliding table 300 rotatably connected to the third link 260 to move left and right during rotation, so that the front mold 320 mounted on the main sliding table 300 can press the bar.

Referring to fig. 10 and 11, when the main crankshaft 210 is rotated to the position shown in fig. 10, the front mold 320 mounted on the main slide table 300 is initially brought into abutment with the workpiece at this time. When the main crankshaft 210 continues to rotate clockwise from the position shown in fig. 10, the front mold 320 mounted on the main sliding table 300 punches the bar until the main crankshaft 210 rotates to the position shown in fig. 11, and the front mold 320 mounted on the main sliding table 300 is in a critical abutment with the workpiece, i.e., the front mold 320 is separated from the workpiece after the main crankshaft 210 rotates clockwise again.

The main crankshaft 210 rotates from the position of fig. 10 to the position of fig. 11 by an angle α2, and when the position of the main crankshaft 210 falls within the angle, the front die 320 mounted on the main slide table 300 cold-upsets the bar. When the position of the main crankshaft 210 is outside the angle, the front die 320 on the sliding table is far away from the bar stock, and the name of the front die is alpha 2, which is the second cold heading radian angle of the cold header.

To facilitate viewing the angle of rotation of the main crankshaft 210, blind holes begin in both the prior art and the present crankshaft. The first cold heading radian angle and the second cold heading radian angle can be clearly obtained according to the rotation angles of the blind holes in the drawings 14 and 15.

As shown in fig. 14 and 15, the second cold forging radian angle in the present application is significantly larger than the first cold forging radian angle in the prior art, which means that the transmission unit in the present application can ensure that the front mold 320 on the main sliding table 300 can squeeze the bar for a longer time during cold forging, the bar is cold-headed at a slower speed, the product has enough forming time, and the metal flow direction in the process of cold forging of the bar is better, and the product sizes of the same batch are substantially consistent (uniformity is improved).

Further, in an embodiment of the present application, the first link 220 may be provided longer, and when the length of the first link 220 is increased, as shown in fig. 9, the first link 220, the second link 240 and the third link 260 form a "figure" structure, and when the main crankshaft 210 drives the first link 220 to rotate, the first link 220 drives the third link 260 to further drive the main sliding table 300 to reciprocate left and right. The same as the transmission unit of the Y-shaped structure is not described herein, and the transmission unit of the "individual" shaped structure will increase the arc angle during cold heading, so that the extrusion time of the front mold 320 on the main sliding table 300 to the bar is longer, and the quality of the produced part is improved.

Further, by providing the transmission unit 200 in a toggle structure, the problem that the transmission unit 200 is easily jammed at the front dead center in the related art is avoided. In order to solve the problem of dead front dead center in the debugging process, the rotation speed of the motor is generally increased to increase the extrusion pressure of the sliding table, the impact force applied to the front mold 320 mounted on the main sliding table 300 during the stamping process is increased, and the front mold 320 is easily damaged during the working process. After the toggle rod structure is used, the bar stock is cold-headed at a slower speed, so that the impact on the die is reduced, and the service life of the die is prolonged.

Referring to fig. 1, a transmission unit 200 and a main sliding table 300 are installed in a lathe bed 100, the main sliding table 300 is slidably connected to the lathe bed 100, the main sliding table 300 is used for installing a front die 320 for stamping bar stock, the transmission unit 200 is connected to a motor, and the transmission unit 200 is used for driving the main sliding table 300 to slide left and right on the lathe bed 100. The main crankshaft 210 is rotatably connected to the machine bed 100, and the main crankshaft 210 is drivingly connected to an output shaft of the motor, the main crankshaft 210 following synchronous rotation as the motor rotates. The main crankshaft 210 is an eccentric shaft, and a first connecting rod 220 is rotatably connected to an eccentric portion of the main crankshaft 210.

Referring to fig. 16 and 17, the transmission unit further includes a first connection shaft 230 and a second connection shaft 250, wherein the first connection shaft 230 is fixedly connected to the machine tool body 100, and the second connection shaft 250 is rotatably connected to the other end of the first connection shaft. One end of the second connection rod is rotatably connected to the second connection shaft 250, and the other end is rotatably connected to the first connection shaft 230. One end of the third connecting rod is rotatably connected to the second connecting shaft 250, and the other end is rotatably connected to the main sliding table 300. By providing the first connection shaft 230 and the second connection shaft 250, the first link 220, the second link 240 and the third link 260 can be stably driven, and thus the driving unit can be ensured to be stably subjected to cold heading operation.

If some special bolts such as hexagon socket head cap bolts are processed, the cold header cannot be processed and formed once when cold-heading the hexagon holes on the bolts, and the first cold-heading can only process a shallower hexagon hole on the bolts.

Further, in an embodiment of the present invention, the transmission unit further includes a front vent structure 270, and the front vent structure 270 is used for driving the front die 320 to punch the workpiece. And the front exit structure 270 is also driven by the main crankshaft 210, the front exit structure 270 punches the parts during rotation of the main crankshaft 210.

Referring to fig. 16 and 18, the front exit structure 270 includes a front exit pressing plate 271, the front exit pressing plate 271 is rotatably connected to the main sliding table 300, a front exit cam 272 is detachably mounted on the third link 260, the front exit cam 272 abuts against the front exit pressing plate 271, and the front exit cam 272 is used for driving the front exit pressing plate 271 to rotate. The front exit rocker 273 is rotatably connected to the main slide table 300, and the front exit rocker 273 is disposed below the front exit pressing plate 271, and the front exit pressing plate 271 is configured to drive the front exit rocker 273 to rotate. The punching rod 274 is slidably connected inside the main sliding table 300, and the front outlet rocker 273 is used for driving the punching rod 274 to move, when the punching rod 274 is driven by the front outlet rocker 273, the punching rod 274 drives the front die 320 to punch a workpiece, so that some hexagon socket head cap bolts can be cold-headed for forming.

Based on the principle of the movement of the main crankshaft 210 described above, in conjunction with fig. 18, when the main crankshaft 210 rotates, the main crankshaft 210 drives the first link 220 to rotate, and in the process of moving the first link 220, the first link 220 drives the third link 260 to move and further drives the front exit cam 272 to move. In conjunction with fig. 19, during the rotation of the front exit cam 272, the front exit platen 271 will rotate on the main slide table 300, thereby driving the front exit rocker 273 to rotate. The punching rod 274 is positioned at the left side of the front through-out rocker 273, and in the process of rotating the front through-out rocker 273, the front through-out rocker 273 drives the punching rod 274 to move leftwards, so that the front end of the part is punched.

That is, under some special machining requirements, when punching is required at the head of the bolt, the punching rod 274 is required to work.

Of course, the front exit cam 272 removably mounted to the third link 260 may be machined when some bolts are machined without special machining requirements. After the front lead-out cam 272 is removed, the third link 260 will no longer drive the front lead-out presser 271 to rotate.

Preferably, in an embodiment of the present invention, the center of gravity of the front passing-out pressing plate 271 is biased to the right so that the front passing-out pressing plate 271 always abuts on the front passing-out cam 272.

Preferably, in an embodiment of the present invention, a torsion spring is disposed between the front discharge platen 271 and the main sliding table 300, and the torsion spring is initially provided with a torsion force, under the action of which the front discharge platen 271 has a tendency to rotate clockwise, so that the front discharge platen 271 always abuts against the front discharge cam 272.

Preferably, in an embodiment of the present invention, in order to enable the front vent cam 272 to better drive the front vent pressing plate 271 to rotate, the front vent pressing plate 271 is provided with a bearing at a contact position with the front vent cam 272, and the front vent cam 272 abuts on the bearing, so that friction between the front vent cam 272 and the front vent pressing plate 271 is smaller.

Referring to fig. 7, 8 and 5, that is, when the main crankshaft 210 moves from the position shown in fig. 7 to the position shown in fig. 8 and then to fig. 5, the third link 260 is used to drive the main sliding table 300 to move rightward, and during the rightward movement, the main crankshaft 210 drives the first link 220 to move against gravity.

Further, in an embodiment of the present invention, the transmission unit further includes a main slipway spring bar 310, the main slipway spring bar 310 is mounted on the machine bed 100, and the main slipway spring bar 310 is used to drive the main slipway 300 to move rightward.

Referring to fig. 1 and 7, a main slipway spring bar 310 is mounted on the bed 100, and one end of the main slipway spring bar 310 abuts against the main slipway 300. When the main slipway 300 moves from the left side to the rightmost side as viewed in fig. 7, the main slipway spring 310 is compressed and a spring potential is stored in the main slipway spring 310.

When the main sliding table 300 moves from the position shown in fig. 7 to the position shown in fig. 8, the main crankshaft 210 and the first connecting rod 220 need to work against gravity at this time, and the elastic potential energy in the compressed main sliding table spring rod 310 is released, that is, the main sliding table spring rod 310 can assist the main sliding table 300 to move rightward at this time, so that the main sliding table 300 moves rightward smoothly.

Further, in an embodiment of the present invention, in order to make the main sliding table 300 slide more smoothly rightward, two main sliding table spring rods 310 are provided, two main sliding table spring rods 310 are both installed on the machine body 100, and two main sliding table spring rods 310 are respectively provided at two sides of the main sliding table 300, so that the main sliding table 300 is stressed uniformly in the process of being driven by elastic force. The main sliding table 300 is an iron (iron alloy) sliding table, for example, when the cold header is used in the north, the temperature difference between winter and summer in the north may be above 50 ℃, and the sliding table can generate more obvious thermal expansion and cold contraction when the room temperature changes.

In order to enable the main sliding table 300 to slide smoothly compared with the machine tool body 100, in an embodiment of the present invention, the transmission unit further includes a limiting structure 280, and the limiting structure 280 is used for limiting the left and right positions of the main sliding table 300, so that the main sliding table 300 can be well limited at any temperature, and further the main sliding table 300 can perform a linear motion in the left and right directions under the driving of the third connecting rod 260.

Specifically, referring to fig. 16 and 17, the limiting structure 280 includes a fixed side plate 281, an adjusting side plate 282, and an adjusting screw, wherein the fixed side plate 281 and the adjusting side plate 282 are respectively abutted against two sides of the main sliding table 300, a sliding slot is formed between the fixed side plate 281 and the adjusting side plate 282, and the main sliding table 300 slides in the sliding slot. An adjusting screw is screwed to the bed 100, and one end of the adjusting screw is screwed to the adjusting side plate 282.

When the air temperature is low in winter, the main sliding table 300 pre-cools and contracts, and at this time, the width of the sliding groove between the adjusting side plate 282 and the fixing side plate 281 needs to be reduced by the rotation of the adjusting bolt, so that the main sliding table 300 can normally slide. Similarly, when the air temperature is high in summer, the main slipway 300 expands at the high air temperature, and at this time, it is necessary to increase the width of the slide groove between the adjustment side plate 282 and the fixing side plate 281 by the rotation of the adjustment bolt, so that the main slipway 300 can normally slide.

Of course, in one embodiment of the present invention, in order to make the adjustment of the adjustment side plate 282 uniform, a plurality of adjustment bolts are typically provided. Further, as shown in fig. 16, the adjusting bolts are distributed along the edges of the adjusting side plates 282, and the adjusting bolts form a rectangular structure, so that the adjusting bolts can more comprehensively adjust the positions of the adjusting side plates 282, for example, the adjusting side plates 282 can be adjusted to the left or right, and the limiting structure 280 can well limit the main sliding table 300 under different working conditions.

Preferably, in an embodiment of the present invention, in order to make the driving of the first link 220, the second link 240, and the third link 260 simpler, the first link 220, the second link 240, and the third link 260 are generally hollowed out. It should be noted that the strength of the first link 220, the second link 240, and the third link 260 is not affected after the hollowed-out process.

Further, in order to reduce the abrasion between the main crankshaft 210 and the first connecting rod 220, the first connecting shaft 230 and the second connecting rod 240, and the second connecting shaft 250 and the first connecting rod 220, and the second connecting rod 240 and the third connecting rod 260, copper sleeves are arranged on the main crankshaft 210, the first connecting rod and the second connecting rod, and the copper sleeves can play a good role in preventing abrasion, and the copper sleeves are worn in time, so that the copper sleeves are only replaced, and the connecting rod or the connecting shaft is not replaced.

Meanwhile, the main sliding table spring rod 310 presses the main sliding table 300 in the process of moving the main sliding table 300, so that the gap between the third connecting rod 260 and the copper bush is reduced, the gap between the first connecting rod 220 and the copper bush is reduced, and the gap between the second connecting rod 240 and the copper bush is reduced. Further, the arrangement of the spring rod 310 of the main sliding table also reduces vibration of the main sliding table 300, so that the cold heading effect of the main sliding table 300 is better.

The clamping unit 600 includes a through crankshaft 610, the through crankshaft 610 is rotatably connected to the bed, and in combination with fig. 2 and 4, the through crankshaft 610 and the main crankshaft 210 are connected through a gear transmission, and when the main crankshaft 210 is rotated by a motor, the through crankshaft 610 follows synchronous rotation. Referring to fig. 32 and 33, the output end of the exiting crankshaft 610 is connected with a transmission long shaft 620 through a helical gear transmission, the transmission long shaft 620 is rotatably connected to the lathe bed, and when the exiting crankshaft 610 rotates, the transmission long shaft 620 rotates synchronously.

Referring to fig. 1 and 32, a turning clamp assembly 630 is mounted on the lathe bed, the turning clamp assembly 630 is a conveying device disclosed in a previous application with application number 202310183092.0 (which has not entered a substantial inspection stage and is not disclosed temporarily), the turning clamp assembly 630 is used for clamping, turning and transferring a bar, that is, the turning clamp assembly 630 is used for clamping a cut bar between the main sliding table 300 and the main mold box 900, and moving or turning a workpiece in a cold heading process between different stations of the main mold box 900, and simultaneously clamping out a workpiece completed by cold heading, and specific structures and working principles of the turning clamp assembly 630 are disclosed in detail in the application document and are not repeated herein.

The lathe bed is rotationally connected with a clamp seat rocker arm 660, the middle part of the clamp seat rocker arm 660 is rotationally connected with the lathe bed, the outer wall of the transmission long shaft 620 is fixedly connected with a clamp seat rocker arm cam 621, one end of the clamp seat rocker arm 660 is abutted with the clamp seat rocker arm cam 621, and the other end is connected with the turnover clamp assembly 630 through a clamp connecting rod 650.

Referring to fig. 32, when the main crankshaft 210 rotates the exiting crankshaft 610, the exiting crankshaft 610 rotates the driving long shaft 620, and further drives the holder rocker arm 660 to swing, and the swinging holder rocker arm 660 drives the turnover clamp assembly 630 to reciprocate. In conjunction with the conveyor of the prior application, the flip clamp assembly 630 will clamp the bar stock for movement.

Further, to enable the return of the flip clamp assembly 630 after rightward movement, the clamp unit 600 further includes a clamp rocker spring lever 670, the clamp rocker spring lever 670 for driving the clamp rocker 660 against the clamp rocker cam 621. When the raised portion of the clamp rocker cam 621 is clear of the clamp rocker 660, the clamp rocker spring lever 670 will drive the clamp rocker 660 to rotate counterclockwise, thereby driving the flip clamp assembly 630 to move to the left. The clamp rocker arm spring bar 670 may be disposed above or below the clamp rocker arm center shaft 640, and when the clamp rocker arm spring bar 670 is disposed below the clamp rocker arm center shaft 640, the clamp rocker arm spring bar 670 is a pull spring bar. When the cartridge rocker arm spring lever 670 is disposed above the cartridge rocker arm center shaft 640, the cartridge rocker arm spring lever 670 is a compression spring lever.

Preferably, in an embodiment of the present invention, in conjunction with fig. 32 and 1, a clamp rocker spring bar 670 is disposed above the clamp rocker center shaft 640 in order to adapt the structure of the bed. And one end of the holder rocker arm spring rod 670 is mounted on the bed, and the other end abuts the holder rocker arm 660. The holder rocker arm spring rods 670 are compression spring rods, when the turnover clamp assembly 630 moves leftwards, the holder rocker arm spring rods 670 store energy, and when the turnover clamp assembly 630 moves rightwards, the holder rocker arm spring rods 670 release stored elastic potential energy.

Further, as shown in fig. 32, a spring bar stopper 680 is provided on the holder rocker arm 660, and the other end of the holder rocker arm spring bar 670 abuts against the spring bar stopper 680.

In order to balance the stress of the holder rocker arm 660, two holder rocker arm spring rods 670 are provided, and the two holder rocker arm spring rods 670 are respectively abutted against two sides of the spring rod blocking column 680, namely, the holder rocker arm spring rods 670 are respectively arranged on two sides of the holder rocker arm 660.

The feeding unit 400 disclosed in the present application drives the bar stock to move through the driving structure 420 and the first driven driving structure 430. The driving structure 420 connects the driving gear 421 and the first feeding wheel 423 through the first rotation shaft 422, and the first driven driving structure 430 connects the first driven gear 431 and the second feeding wheel 434 through the second rotation shaft 432. And the second rotating shaft 432 of the first driven driving structure 430 is disposed in the first mounting box 433, the second rotating shaft 432 can rotate relative to the first mounting box 433, and the first mounting box 433 can rotate relative to the mounting seat 410. A first cylinder 2 is disposed above the mounting seat 410, and the first cylinder 2 is used for driving the first mounting box 433 to rotate. The feeding unit 400 is provided with a material blocking frame 4, and a pressure sensor 4a is arranged on the material blocking frame 4. After the distance between the material blocking frame 4 and the cutting knife is set by moving the material blocking frame 4 (the length of the bar to be cut), when one end of the bar passes through the wire inlet guide pipe 7 and abuts against the material blocking frame 4, the pressure sensor 4a on the material blocking frame 4 is triggered, and at the moment, the pressure sensor 4a transmits a signal to the controller. The controller controls the extension of the output shaft of the air cylinder, so that the first mounting box 433 rotates, and the second feeding wheel 434 is tightly pressed on the first feeding wheel 423 under the rotation of the first mounting box 433. At this time, the bar between the first feed wheel 423 and the second feed wheel 434 is also tightly clamped, and the driving gear 421 and the first driven gear 431 are not engaged any more, so that the first feed wheel 423 and the second feed wheel 434 are not feeding the bar, and the bar cannot move left and right. Ensuring that the bar stock can be cut off accurately.

Specifically, as shown in fig. 20 and 21, the feeding unit 400 includes a mounting seat 410, and in combination with fig. 23, a first mounting hole 411 and a first limiting hole 412 are provided on the mounting seat 410, and the first limiting hole 412 is located right above the first mounting hole 411. The driving structure 420 includes a driving gear 421, a first shaft 422 and a first feeding wheel 423, where the driving gear 421 and the first feeding wheel 423 are coaxially fixed on the first shaft 422, and the first shaft 422 is installed in the first installation hole 411, and the first device 22 is rotationally connected to the installation seat 410, and the first shaft 422 is used to drive the driving gear 421 and the first feeding wheel 423 to rotate. The first driven driving structure 430 includes a first driven gear 431, a second rotating shaft 432, a first mounting box 433 and a second feeding wheel 434, wherein the first driven gear 431 and the second feeding wheel 434 are respectively disposed at two ends of the second rotating shaft 432, the second rotating shaft 432 is rotatably connected in the first mounting box 433, the first mounting box 433 passes through the first limiting hole 412, and the first mounting box 433 is slidably connected with the mounting seat 410, and the first mounting box 433 is limited to slide up and down in the first limiting hole 412. The first driven gear 431 is engaged with the driving gear 421, and when the first rotation shaft 422 drives the driving gear 421 to rotate, the first driven gear 431 engaged with the driving gear 421 rotates in synchronization with the driving gear 421. And the first feed wheel 423 and the second feed wheel 434 are rotated in opposite directions so that the bar between the first feed wheel 423 and the second feed wheel 434 can be transferred to the cutting position of the cold header.

The mounting seat 410 is further provided with a first supporting rod 1, one end of the first supporting rod 1 is fixedly connected with the inner wall of the mounting seat 410, and the other end of the first supporting rod 1 is rotatably connected with the first mounting seat 410. The first supporting rod 1 and the first mounting box 433 form a lever structure, and the first mounting box 433 rotates under the limit of the first limiting hole 412 by taking the first supporting rod 1 as the center of a circle.

A material blocking frame 4 is disposed on one side of the mounting seat 410, the material blocking frame 4 is disposed on a movement path of the bar stock, and a pressure sensor 4a is disposed on the material blocking frame 4.

The mounting seat 410 is also provided with a first air cylinder 2 and a controller, and the first air cylinder 2 is used for driving the first mounting box 433 to rotate around the first supporting rod 1. When the first cylinder 2 operates, the driving gear 421 and the first driven gear 431 are separated, and the rotation of the driving gear 421 cannot be transmitted to the first driven gear 431.

When the bar is driven by the first feeding wheel 423 and the second feeding wheel 434 to a sufficient length (length of a workpiece to be processed), one end of the bar passes through the wire feeding pipe 7 and abuts against the material blocking frame 4 to trigger the pressure sensor 4a, the pressure sensor 4a feeds back the signal to the controller, the controller controls the first cylinder 2 to move, the first cylinder 2 works so that the driving gear 421 and the first driven gear 431 are separated, meanwhile, the second feeding wheel rotates and is close to the first feeding wheel 423, and the first feeding wheel 423 and the second feeding wheel 434 are matched to clamp the bar, so that the bar cannot be fed when cut off, and the accuracy of the cut length of the bar is further ensured.

Referring to fig. 24 to 25, in order to facilitate the separation of the first driven gear 431 and the driving gear 421, the first strut 1 is generally disposed close to the first driven gear 431. As shown in fig. 24, when the connection point of the first strut 1 and the mount 410 is close to the first driven gear 431, the second feeding wheel 434 only needs to be lowered by a low height to separate the first driven gear 431 from the driving gear 421.

Of course, the first cylinder 2 is disposed above the first mounting box 433, and the first cylinder 2 is disposed close to the second feed wheel 434. After the first cylinder 2 receives the signal sent by the controller, the output shaft of the first cylinder 2 stretches, and the first cylinder 2 drives the first mounting box 433 to rotate around the first supporting rod 1. The first cylinder 2 is disposed close to the second feeding wheel 434 such that a small downward force applied by the first cylinder 2 can move the first driven gear 431 upward to be separated from the driving gear 421. Of course, the longer arm of force at the first cylinder 2 can make the first driven gear 431 stable at a high point, thereby avoiding the first driven gear 431 from falling down to mesh with the driving gear 421.

Further, in an embodiment of the present invention, in order to enable the first mounting box 433 to be conveniently reset to the original position after rotation, that is, the position where the first driven tooth is meshed with the driving gear 421, a first compression spring 3 is further provided, close to the second feeding wheel 434, and one end of the first compression spring 3 is mounted on the mounting base 410, and the other end of the first compression spring 3 abuts against the bottom of the first mounting box 433.

When the first cylinder 2 drives the first mounting box 433 to rotate, the first mounting box 433 compresses the first compression spring 3 in the rotating process, so that the first compression spring 3 reserves certain elastic potential energy. When the output shaft of the first cylinder 2 is retracted, the elastic potential energy stored in the first compression spring 3 is released, and the elastic potential energy rotates the first mounting block 433, and after the rotation of the first mounting block 433 is stopped, the first driven gear 431 and the driving gear 421 are re-engaged.

Further, in an embodiment of the present invention, the initial state of the first compression spring 3 may be a compressed state, and in combination with fig. 24 or fig. 25, the first compression spring 3 in the compressed state applies an upward force to the first mounting box 433, and under the action of the first strut 1, the first mounting box 433 has a clockwise rotation tendency, and the first driven gear 431 can be pressed against the driving gear 421.

In order to enable the first rotating shaft 422 to rotate and drive the driving gear 421 to rotate, a one-way bearing 442 is arranged at one end of the first rotating shaft 422, and an inner ring of the one-way bearing 442 is connected with an outer wall key groove of the first rotating shaft 422. The outer ring of the one-way bearing 442 is fixedly connected with the swing arm 441, the swing arm 441 is disposed at one side of the mount 410, and the swing arm 441 is used to be driven by the feeding rocker 443 to swing left and right. The feeding rocker 443 is eccentrically mounted on the main crankshaft 210, and when the main crankshaft 210 rotates, the feeding rocker 443 drives the swing arm 441 to reciprocate left and right.

Preferably, in one embodiment of the invention, the one-way bearing 442 may rotate counterclockwise. As shown in fig. 20, in the process of moving the swing arm 441 from left to right to a high position, since the unidirectional bearing 442 can not rotate clockwise, the swing arm 441 drives the first rotating shaft 422 to rotate, and then drives the driving gear 421 to rotate, the driving gear 421 drives the first driven gear 431 to rotate, and the first feeding wheel 423 and the second feeding wheel 434 rotate in opposite directions, so that the bar stock can be conveyed to the material blocking frame 4 to trigger the pressure sensor 4a.

Further, in an embodiment of the present invention, assuming that the position of the swing arm 441 is the highest point of the swing arm 441 as shown in fig. 20, if the bar just triggers the pressure sensor 4a at this time, the bar is the bar with the longest length that can be processed by the cold header. After the pressure sensor 4a is triggered by the bar stock, the controller controls the first cylinder 2 to work according to the signal fed back by the pressure sensor 4a, so that the first driven gear 431 and the driving gear 421 are separated.

If the pressure sensor 4a is activated when the swing arm 441 reaches the highest point as shown in fig. 20, the first driven gear 431 and the driving gear 421 are separated before the swing arm 441 reaches the highest point, and at this time, the feeding rocker 443 drives the driving gear 421 to rotate, and since the second feeding wheel 434 is pressed against the first feeding wheel 423, the bar between the first feeding wheel 423 and the second feeding wheel 434 cannot move under the separate rotation of the first feeding wheel 423.

Because the cold header is entirely powered by a motor, the running speed of other parts is not changed, and the processing speed of other parts is smaller than or equal to the feeding speed of the longest bar which can be processed by the cold header. Therefore, when the length of the bar stock is changed, the production of workpieces with different lengths can be completed only by changing the position of the material blocking frame 4.

Preferably, in an embodiment of the present invention, in order to make the feeding process of the feeding unit 400 smoother, a second mounting hole and a second limiting hole 413 are further provided on the mounting base 410, wherein the second mounting hole is provided at one side of the first mounting hole 411, and the second limiting hole 413 is provided right above the second mounting hole.

The feeding unit 400 further includes a second driving structure and a third driving structure, the second driving structure includes a second driven gear 451, a third rotation shaft 452, and a third feeding wheel 453, the third rotation shaft 452 is rotatably installed in the second installation hole, and the second driven gear 451 and the third feeding wheel 453 are coaxially installed at both ends of the third rotation shaft 452. The third driving structure includes a third driven gear 461, a fourth rotating shaft 462 and a fourth feeding wheel 463, the fourth rotating shaft 462 is installed in the second limiting hole 413, and the third driven gear 461 and the fourth feeding wheel 463 are coaxially installed at both ends of the fourth rotating shaft 462, and the second driven gear 451 and the third driven gear 461 are engaged.

A transmission gear 470 is further provided between the driving gear 421 and the second driven gear 451, the transmission gear 470 is rotatably connected to the mounting base 410, and the transmission gear 470 is engaged with the driving gear 421 and the second driven gear 451, respectively. When the driving gear 421 rotates, the driving gear 421 drives the second driven gear 451 to rotate through the driven gear.

As shown in fig. 21 and 22, when the driving gear 421 rotates clockwise, the first driven gear 431 rotates counterclockwise, the driving gear 470 rotates counterclockwise, the second driven gear 451 rotates clockwise, and the third driven gear 461 rotates counterclockwise, that is, when the driving gear 421 and the first driven gear 431 rotate toward each other to transfer the bar to the right, the second driven gear 451 and the third driven gear 461 rotate toward each other to transfer the bar to the right.

The left-right direction in fig. 21 and 22 is in accordance with the direction indicated in the drawing.

Of course, to make the bar material more stable to be clamped, the third driven driving structure 460 further includes a second mounting box 464, the fourth rotating shaft 462 is rotatably connected to the second mounting box 464, and the second mounting box 464 passes through the second limiting hole 413, and the second mounting box 464 is slidably connected to the mounting seat 410.

The feeding unit 400 further includes a second supporting rod 5 and a second cylinder 6, and one end of the second supporting rod 5 is fixedly connected with the mounting seat 410, and the other end is rotatably connected with the second mounting box 464. A second cylinder 6 is mounted on the mounting base 410, and the second cylinder 6 is used for driving the second mounting box 464 to rotate around the second strut 5. The second cylinder 6 is electrically connected with the controller in the same way, and the second cylinder 6 and the first cylinder 2 work synchronously, namely the second cylinder 6 and the first cylinder 2 synchronously press the feeding wheel, so that the bar stock is locked.

Similar to the first strut 1 and the first cylinder 2 described above, the second strut 5 is likewise adjacent to the third driven gear 461, and the second cylinder 6 is adjacent to the fourth feed wheel 463.

Likewise, in order to allow the second mounting case 464 to be conveniently restored to the original position after rotation, a second compression spring is provided between the mounting base 410 and the second mounting case 464. The second compression spring initial state may be a compressed state, and the second mounting case 464 has a tendency to rotate clockwise so that the third driven gear 461 can be pressed against the second driven gear 451.

Preferably, in an embodiment of the present invention, the first feed wheel 423 and the second feed wheel 434 are circumferentially provided with annular grooves, and the third feed wheel 453 and the fourth feed wheel 463 are axially provided with annular grooves, thereby enabling the bar to be substantially restrained. Of course, the bar is limited mainly by the spool.

As shown in fig. 26, the first mounting box 433 and the second mounting box 464 are a square tubular box body, the second rotating shaft 432 is rotatably connected to the inner cavity of the first mounting box 433, two ends of the second rotating shaft extend out of the first mounting box 433, and the fourth rotating shaft 462 is rotatably connected to the inner cavity of the second mounting box 464, two ends of the fourth rotating shaft extend out of the second mounting box 464.

Of course, in order to facilitate the installation of the first compression spring 3 and the second compression spring, a blind hole 414 for installing the first compression spring 3 and the second compression spring is provided in the installation seat 410.

The blanking unit 500 provided by the application is provided with two lugs 510, circular through holes are coaxially arranged on opposite sides of the two lugs 510, a copper sleeve 570 is arranged in the circular through holes, the copper sleeve 570 is a wear-resistant copper sleeve, a push rod is arranged as a cutter round rod 530, the cutter round rod 530 is arranged in the copper sleeve 570, and the cutter round rod 530 is not in direct contact with the lathe bed 100. When the cutter round bar 530 moves relative to the wear-resistant copper sleeve 570, the abrasion between the cutter round bar 530 and the copper sleeve 570 is small, so that the cutter round bar 530 can keep the original state for a long time, the cutter round bar 530 drives the cutter bar to stably move, and the cut-off length of the bar is ensured to meet the requirements. Meanwhile, when the cutter rod 530 and the copper sleeve 570 move relatively, the copper sleeve 570 is worn, and when the channel reaches the service life, the copper sleeve 570 is only required to be replaced, so that the blanking unit 500 can recover normal blanking.

Specifically, referring to fig. 1 and 27, the blanking unit 500 includes two lugs 510, the two lugs 510 being fixedly connected to the machine body 100 opposite to each other at a distance, referring to fig. 28, coaxial circular through holes are formed in opposite sides of the lugs 510, and referring to fig. 29, a copper sleeve 570 is installed in the through holes, and the copper sleeve 570 is a wear-resistant copper sleeve 570. The cutter bar 530 passes through the two copper sleeves 570, and the cutter bar 530 is slidably coupled to the two copper sleeves 570, respectively. The cutter structure 520 is disposed between the two lugs 510, the cutter bar 530 abuts against the cutter structure 520, and when the cutter bar 530 slides in the two copper sleeves 570, the cutter bar 530 drives the cutter structure 520 to move between the lugs 510 and close to the bar stock, and when the cutter structure 520 moves to the limit position, the bar stock is cut off. Because the lug 510 and the cutter round bar 530 are spaced by the copper sleeve 570, the abrasion of the cutter round bar 530 in the running process is reduced, so that the cutter round bar 530 can still maintain the original shape after long-time running, and the cutting length of the bar can be ensured to fall within the tolerance range.

As shown in fig. 29, the blanking unit 500 further includes a first elastic member 540 and a blanking driving structure 550, wherein the blanking driving structure 550 is used for driving the cutter bar 530 to reciprocate, the first elastic member 540 is mounted on the lathe bed 100, the first elastic member 540 is used for driving the cutter structure 520 away from the bar stock, and the first elastic member 540 and the cutter bar 530 cooperate, so that the cutter structure 520 can continuously cut the bar stock.

Specifically, referring to fig. 30, the cutter structure 520 includes a cutter seat 521 and a cutter head 522, wherein the cutter seat 521 is disposed between two lugs 510, and the cutter seat 521 is slidably coupled with the lugs 510, and the cutter seat 521 slidably coupled with the lugs 510 is stably slidable. The tool head 522 is fixedly connected to one side of the tool post 521, and the tool head 522 extends into the bed 100 through a sidewall of the bed 100. The cutter round bar 530 is abutted against the cutter seat 521, and in the process of reciprocating movement of the cutter round bar 530, the cutter round bar 530 drives the cutter seat 521 to move rightwards, so that the cutter head 522 is driven to cut off the bar stock.

Further, a cutting surface is provided on the cutter bar 530, and the cutter seat 521 abuts against the cutting surface. Specifically, the blanking surface includes a first portion 531 and a second portion 532, where the distance between the first portion 531 and the axis of the round bar is greater than the distance between the second portion 532 and the axis of the round bar, and a drop is formed between the second portion 532 and the second portion 532, and when the round bar 530 moves backward, the tool holder 521 moves from the second portion 532 to the first portion 531, and at this time, the tool holder 521 is fed rightward, that is, the tool holder 521 drives the tool bit 522 to move rightward to cut off the bar.

Wherein the transition plane between the first portion 531 and the second portion 532 becomes a cut-off portion 533, one end of the cut-off portion 533 is connected to the first portion 531, and the other end of the cut-off portion 533 is connected to the second portion 532, when the tool holder 521 abuts against the cut-off portion 533, i.e. the cutter is cutting off the bar. In an embodiment of the present invention, in order to make the tool holder 521 run smoothly, the cutting portion 533 is configured as a smooth curved surface, i.e., the junctions between the cutting portion 533 and the first portion 531 and the second portion 532 are all configured smoothly, so that the tool holder 521 is smooth when switching different abutment planes, and stable cutting of the bar is ensured.

In order to facilitate the installation of the first elastic member 540, a cutter bar body cover plate 560 and a cutter bar body cover plate 560 are installed at one side of the lug 510, the first elastic member 540 is installed on the cover plate, and one end of the first elastic member 540 is fixedly connected with the tool apron 521. When the tool holder 521 moves rightward, the first elastic member 540 reserves an elastic potential energy, and when the first portion 531 no longer abuts against the tool holder 521, the elastic potential energy is released and drives the tool holder 521 to move leftward.

Specifically, the first elastic member 540 may be a compression spring or a tension spring. As shown in fig. 30, when the first elastic member 540 is provided as a tension spring, the first elastic member 540 is provided on the right side of the cutter bar cover plate 560, and the first elastic member 540 is provided on the left side of the cutter bar cover plate 560, and the cutter bar cover plate 560 when the first elastic member 540 is provided as a compression spring.

Preferably, in an embodiment of the present invention, in order to facilitate the connection between the first elastic member 540 and the tool holder 521, the first elastic member 540 is configured as a spring rod, and the spring rod includes a pressure spring and a rod body, and the rod body passes through the tool bar body cover plate 560, and the tool holder 521 and is fixedly connected with the tool holder, when the tool holder 521 moves rightward, the rod body is driven to move rightward, at this time, the rod body compresses the pressure spring, and when the first portion 531 no longer abuts against the tool holder 521, the pressure spring releases elastic potential energy and drives the tool holder 521 to abut against the second portion 532.

Preferably, in an embodiment of the present invention, in order to balance the force of the tool holder 521, two first elastic members 540 are generally disposed, and the two first elastic members 540 are disposed at two ends of the tool holder 521.

In an embodiment of the present invention, in combination with fig. 30-31, in order to enable the cutter structure 520 to be adapted to cut bars of different rod diameters, the cutter structure 520 further comprises an eccentric adjustment shaft 523. The eccentric adjusting shaft 523 is in threaded connection with the tool apron 521, and the eccentric adjusting shaft 523 comprises a shaft body 5231 and an eccentric portion 5232, the eccentric portion 5232 is used for being abutted against the round cutter rod 530, when different positions of the tool bit 522 are required to be adjusted, the eccentric adjusting shaft 523 is only required to be rotated, so that the positions of the eccentric portion 5232 abutted against the round cutter rod 530 are different, namely, the positions of the tool bit 522 in the left-right direction are different, and then the cutter can be adapted to cut bars with different rod diameters.

Of course, in an embodiment of the present application, in order to make the movement of the cutter bar 530 relative to the eccentric adjustment shaft 523 smoother, a bearing 524 is further provided at the eccentric portion 5232, an inner ring of the bearing 524 is sleeved on an outer wall of the eccentric portion 5232, and an outer ring of the bearing 524 abuts against the cutter bar 530.

In an embodiment of the present application, in order to reduce wear between the cutter head 522 and the bed, a copper sleeve 570 is similarly disposed between the cutter head 522 and the bed, thereby enabling stable operation of the cutter head 522.

Specifically, the blanking driving structure 550 includes a bearing seat 551 and a cutter link 552. The output end of the main crankshaft 210 is provided with a gear on which the bearing housing 551 is eccentrically disposed. The cutter link 552 is disposed between the bearing housing 551 and the cutter bar 530, one end of the cutter link 552 is rotatably connected to the bearing housing 551, and the other end is rotatably connected to the cutter bar 530. When the cutter link 552 rotates under the drive of the main crankshaft 210, the cutter link 552 moves left and right and drives the cutter round bar 530 to move left and right, thereby driving the cutter to cut off the bar.

According to the second ejection unit 800, the ejection needle 822 and the ejection die 823 are arranged between the ejection rod 821 and the bar stock, the ejection die 823 is driven to move through the ejection rod 821, and the bar stock moves along the movement direction of the ejection rod 821 when being ejected due to the fact that the rod diameter of the ejection die 823 is larger than that of the bar stock, so that the bar stock can be ejected into the clamping jaw smoothly and clamped by the clamping jaw.

Referring to fig. 1 or 32, the second ejector unit 800 includes a second ejector rocker arm 810, the middle part of the second ejector rocker arm 810 is rotationally connected with the machine body, one end of the second ejector rocker arm 810 is in transmission connection with an ejector driving structure 840, and when the ejector driving structure 840 works, the second ejector rocker arm 810 is driven to swing. The other end of the second ejection rocker 810 is rotatably connected with an ejection rod 821, the ejection rod 821 is slidably connected to the lathe bed, and when the second ejection rocker 810 is driven to work by the ejection driving structure 840, the second ejection rocker 810 which swings drives the ejection rod 821 to reciprocally slide on the lathe bed. The ejection structure further comprises an ejection needle 822 and an ejection die 823, the ejection die 823 is connected with the lathe bed in a sliding mode, and the ejection die 823 is used for ejecting bars. The ejector pin 822 is provided between the ejector die 823 and the ejector rod 821, and one end of the ejector pin 822 abuts against the ejector die 823 and the other end abuts against the ejector rod 821.

Referring to fig. 33, specifically, a main mold box 900 is used for installing a mold, a through hole is formed in the main mold box 900, and a ejector pin 821 and an ejector mold 823 are slidably connected in the through hole.

As shown in fig. 34, when the second ejector rocker 810 rotates clockwise, the second ejector rocker 810 drives the ejector rod 821 to move leftwards, at this time, the ejector rod 821 in the main die box 900 mounted on the lathe bed abuts against the ejector pin 822 to drive the ejector die 823 to move leftwards in the leftward movement process, and in combination with fig. 33, the ejector die 823 extends from the main die box 900 to eject the cut bar into the clamping jaw. Since the rod diameter of the ejector die 823 is larger than that of the rod, when the rod is ejected by the ejector die 823, the movement track of the rod is identical to that of the ejector die 823, and the rod can be ejected to the clamping jaw perpendicular to the main die box 900.

Referring to fig. 32, the ejector driving structure 840 includes a drive vertical shaft 841 and a cam shaft 842. The transmission long shaft 620 is connected with the through crankshaft 610 through a bevel gear transmission. One end of the drive shaft 620 is in drive connection with the exiting crankshaft 610 and the other end is in drive connection with the drive shaft 841. One end of the vertical transmission shaft 841 is in transmission connection with the long transmission shaft 620, and the other end is in transmission connection with the camshaft 842. The drive vertical shaft 841 and the camshaft 842 are both rotatably connected to the machine bed. Mounted on the camshaft 842 is a liftout cam 850, the liftout cam 850 being used to drive the second liftout rocker arm 810 into swing. That is, as the main crankshaft 210 rotates, the ejector cam 850 drives the second ejector rocker arm 810 to oscillate.

The long transmission shaft 620, the vertical transmission shaft 841 and the camshaft 842 are all arranged to be adapted to the specific structure of the lathe bed, so that the power at the main crankshaft 210 can be transmitted to the ejector cam 850.

Referring to fig. 34, in an embodiment of the present application, the second ejector unit 800 further includes an ejector rocker arm seat 860, the ejector rocker arm seat 860 is mounted on the bed, and the second ejector rocker arm 810 is rotatably connected to the ejector rocker arm seat 860. The ejector rocker arm base 860 is further rotatably connected with a driving block 870, a connecting plate 880 is arranged between the second ejector rocker arm 810 and the driving block 870, one end of the connecting plate 880 is rotatably connected with the driving block 870, and the other end is rotatably connected with the second ejector rocker arm 810.

As shown in fig. 34, when the ejector cam 850 abuts against the driving block 870, the ejector cam 850 drives the driving block 870 to rotate clockwise as the protruding portion of the ejector cam 850 abuts against the driving block 870, at this time, the driving block 870 drives the connecting plate 880 to move rightward, the connecting plate 880 moving rightward drives the ejector rocker arm 860 to rotate clockwise, and the ejector rod 821 drives the ejector rod 821 to eject the bar leftward. By providing the drive block 870 and connecting rod between the second ejector rocker arm 810 and the ejector cam 850, the length required for the second ejector rocker arm 810 is reduced, and the second ejector rocker arm 810 of the present application is more durable than the second ejector rocker arm 810 of the prior art in the same rod diameter.

Further, in order to enable the ejector die 823 to reset after ejecting the bar stock, the ejector structure further includes a second elastic member 830, the second elastic member 830 is mounted on the lathe bed, and the second elastic member 830 is used to enable the driving block 870 to always abut on the ejector cam 850.

Specifically, referring to fig. 34 and 33, on the basis of setting the main mold box 900, the second elastic member 830 is disposed in the main mold box 900, and the second elastic member 830 is used for driving the ejector mold 823 to move rightward, so that the ejector mold 823 drives the ejector rod 821 to move rightward through the ejector pin 822, and further, the second ejector rocker 810 rotates counterclockwise, so that the driving block 870 abuts against the ejector cam 850.

Further, the wire feeding guide pipe of the bar is usually arranged beside the material pushing die 823, and when the bar is cut, the bar is pushed to the material pushing die 823 by the cutter. In order to avoid abrasion of the main mold 900 by the bar feeding and ejection rod 821, an inlet wire guide pipe sleeve is further arranged, the sleeve is inserted on the main mold 900, and the sleeve does not rub with the main mold 900. Bar stock is fed from the wire inlet conduit sleeve, and the ejector rod 821 and the ejector die 823 are connected in the wire inlet conduit sleeve in a sliding mode.

The second elastic member 830 may be a compression spring or a tension spring, when the second elastic member 830 is a compression spring, as shown in fig. 33, the second elastic member 830 is disposed in the wire inlet conduit sleeve, the second elastic member 830 is compressed in the process that the ejector rod 821 moves leftwards to eject the ejector die 823, when the ejector cam 850 does not press the driving block 870 rightwards any more, the second elastic member 830 drives the ejector die 823 to reset leftwards and rightwards under the reaction force of the second elastic member 830, and in the process that the ejector die 823 moves rightwards, the ejector needle 822 is abutted to enable the ejector rod 821 to move rightwards, so that the driving block 870 is always abutted on the cam.

In an embodiment of the present invention, when the second elastic member 830 is a tension spring, the installation and left-right principle of the tension spring can be similar to that of the compression spring, and will not be described herein.

The first ejector unit 700 replaces a plurality of narrower ejector swing arms arranged in parallel by arranging a wider first ejector swing arm 710, and a plurality of ejector bolt 730 are arranged on the wider ejector swing arm, so that a shorter part similar to a nut of each cold heading station can be simultaneously ejected into a clamping jaw by the wider ejector swing arm, and the processing cost of the first ejector swing arm 710 is reduced on the basis of ensuring normal production of the cold heading machine.

Specifically, referring to fig. 35 to 36, the first ejector unit 700 includes a first ejector rocker arm 710, wherein a middle portion of the first ejector rocker arm 710 is rotatably connected to the machine body through a pivot 712 of the first ejector rocker arm 710, a plurality of ejector mounting plates 720 are mounted on top of the first ejector rocker arm 710 in parallel, the ejector mounting plates 720 are disposed at intervals, and an ejector bolt 730 is mounted on each of the ejector mounting plates 720. One side of the ram bolt 730 is provided with a ram 740, the ram 740 is slidably connected to the machine body, and the ram 740 is driven by the ram bolt 730 to slide. One side of the ejector rod 740 is provided with a main die box 900, and the ejector rod 740 is opposite to a processing hole site in the main die box 900. The first ejector unit 700 further includes an ejector link 770, one end of the ejector link 770 is rotatably connected to an eccentric portion of the exiting crankshaft 610, and the other end of the ejector link 770 is rotatably connected to the bottom of the first ejector rocker arm 710. When one end of the ejector link 770 moves following the rotation of the exiting crankshaft 610, the other end of the ejector link 770 reciprocates left and right.

In the process of the reciprocating motion of the other end of the ejection connecting rod 770, the ejection connecting rod 770 drives the first ejection rocker arm 710 to swing clockwise and anticlockwise, and then the first ejection rocker arm 710 drives the ejector bolt 730 to eject the workpiece into the clamping jaw.

When the cold heading of the workpiece is completed, the driving structure drives the first ejector rocker 710 (as shown in fig. 36) to rotate clockwise, at this time, the first ejector rocker 710 drives the ejector mounting plate 720 to rotate, and the ejector bolt 730 mounted on the ejector mounting plate 720 follows the rotation, at this time, the ejector bolt 730 pushes the ejector 740 to the right, so that the ejector 740 pushes into the machining hole site of the main die box 900, and thus the workpiece in the machining hole site is pushed into the clamping jaw.

Specifically, referring to fig. 36, a lifter bolt 730 is threadably coupled to the first lifter rocker 710 mounting plate, the lifter bolt 730 including a shank 731 and a head 732, wherein the head 732 is oriented toward the lifter 740, and the head 732 is configured to strike the lifter 740. The head 732 has a larger cross-sectional area so that the jack bolt 730 can more accurately strike the jack 740.

To facilitate the installation of the ejector rod 740, the first ejector unit 700 further includes an ejector tube bottom plate 750 and an ejector tube 760, wherein the ejector tube bottom plate 750 is mounted on the bed 100 by screws. The lathe bed 100 is provided with a through hole, the ejector tube bottom plate 750 is provided with a screw hole coaxially arranged with the through hole, and the ejector tube 760 is in threaded connection with the screw hole. The push rod 740 is slidably connected to the inner wall of the ejector tube 760.

Wherein the inner diameter of the ejector tube 760 is variable, so that the ejector rod 740 with different thickness can be conveniently replaced to adapt to workpieces with different sizes. Or if the ejector rod 740 is damaged, the ejector rod 740 is convenient to replace.

Further, the positional relationship between the ejector tube 760 and the ejector tube base plate 750 is adjustable. When processing shorter workpieces with different lengths, the distances required to be ejected for the different workpieces are different due to the different lengths after cold heading, namely, the distance required to move the ejector rod 740 to the right is required to be adjusted, so that the first ejection unit 700 can be adapted to produce different workpieces.

In one embodiment of the present invention, in producing a shorter length workpiece, it is necessary to rotate the ejector pin 760 so that the ejector pin 740 moves farther to the right.

In one embodiment of the present invention, in producing a longer length workpiece, it is desirable to rotate the ejector tube 760 so that the ejector rod 740 moves a smaller distance to the right.

Of course, in an embodiment of the present invention, in order to enable the ejector rod 740 to be automatically reset to the initial position after the rightward movement, a third elastic member is further provided in the ejector tube 760. The third elastic member is used to drive the jack 740 to move toward the jack bolt 730.

In connection with fig. 36, the third elastic member provided in the ejector tube 760 may be a compression spring or a tension spring. When the third elastic member is provided as a compression spring, the compression spring is compressed when the jack 740 moves rightward, and thus the jack 740 can move leftward after the first ejector rocker 710 is reset counterclockwise. When the third elastic member is a tension spring, the tension spring is stretched when the push rod 740 moves rightward, and thus the push rod 740 can move leftward after the first ejector rocker 710 is reset counterclockwise.

The third elastic member is not shown in the drawings because it is usually disposed in the tube.

Preferably, in an embodiment of the present invention, in order to smoothly rotate between the exiting crankshaft 610 and the ejector connecting rod 770, a copper sleeve is provided at an eccentric portion of the exiting crankshaft 610, and the copper sleeve is provided so that the ejector connecting rod 770 smoothly rotates.

Further, in order to enable the ejector swing arm to swing more easily, a first lightening hole 711 is provided on the ejector swing arm. The first lightening holes 711 are arranged on the liftout swing arms in an array, and the first lightening holes 711 are arranged on the strength of the structure of the liftout swing arms, so that the dead weight of the liftout swing arms is smaller, and the liftout swing arms are driven by the through crankshaft 610 more easily.

Further, referring to fig. 35 and 37, the ejector link 770 is provided with second lightening holes 771 in the same manner, the second lightening holes 771 are provided at intervals along the extending direction of the ejector link 770, the second lightening holes 771 are provided on both sides of the ejector link 770, and the section of the ejector link 770 provided with the second lightening holes 771 is i-shaped. Of course, the setting of second lightening hole 771 guarantees in the intensity of liftout swing arm structure for liftout connecting rod 770's dead weight is littleer, and then makes possess less friction between liftout connecting rod 770 and the copper sheathing.

Of course, a bearing 524 is disposed at the contact position of the driving block 87 and the ejector cam 85, so that the ejector cam 85 can smoothly drive the driving block 87 to rotate. The abutment between the holder rocker arm 660 and the holder rocker arm cam 621 is also provided with a bearing, so that the holder rocker arm cam 621 can smoothly drive the holder rocker arm 660 to rotate.

It will be understood that equivalents and modifications will occur to those skilled in the art based on the present invention and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention.

Claims

1. A cold header, comprising:

A bed body;

a transmission unit comprising:

the first connecting shaft is fixedly connected to the lathe bed;

2. The cold header of claim 1, wherein when the second connecting shaft is located below the first connecting shaft, the first connecting rod, the second connecting rod and the pushing connecting rod form a Y-shaped structure.

3. The cold header of claim 1, wherein when the second connecting shaft is located above the first connecting shaft, the first connecting rod, the second connecting rod and the pushing connecting rod form a "figure" structure.

4. The cold header according to claim 1, wherein the clamping unit comprises:

5. The cold header of claim 4, wherein the feed unit comprises:

6. The cold header of claim 4, wherein the blanking unit comprises:

a cutter structure disposed between two of the lugs;

7. The cold header of claim 4, further comprising a first header unit, the first header unit comprising:

8. The cold header of claim 4, further comprising a second header unit, the second header unit comprising:

9. The cold header of claim 1, wherein the drive unit further comprises a forward lead-out structure comprising:

the front through cam is detachably arranged on the pushing connecting rod;

10. The cold header of claim 1, wherein the transmission unit further comprises a limiting structure, the limiting structure comprises a fixed side plate, an adjusting side plate and an adjusting screw, the fixed side plate and the adjusting side plate are respectively abutted to two sides of the main sliding table, the adjusting screw is in threaded connection with the lathe bed, and the adjusting screw penetrates through the lathe bed to be abutted to the adjusting side plate.

11. The cold header of claim 5, wherein the feed unit further comprises:

12. The cold header of claim 5, wherein the feed unit further comprises a first compression spring, the first compression spring is close to the second feed wheel, one end of the first compression spring is mounted on the mounting base, and the other end of the first compression spring is mounted on the bottom of the first mounting box.

13. The cold header of claim 5, wherein the mounting base is provided with a second mounting hole and a second limiting hole, the second mounting hole is disposed on one side of the first mounting hole, the second limiting hole is disposed right above the second mounting hole, and the feeding unit further comprises:

14. The cold header of claim 13, wherein said third driven drive structure further comprises a second mounting box, said feed unit further comprising a second strut and a second cylinder;

15. The cold header of claim 14, wherein the feed unit further comprises a second compression spring, the second compression spring is close to the fourth feed wheel, one end of the second compression spring is abutted against the mounting seat, and the other end of the second compression spring is abutted against the bottom of the second mounting box.

16. The cold header of claim 6, wherein the cutter structure includes a cutter seat and a cutter head, the cutter head passing through a side wall of the bed and being slidably coupled to the bed, the cutter seat being in abutment with the cutter bar.

17. The cold header of claim 16, wherein the cutter bar is provided with a first plane and a second plane, the distance between the first plane and the axis of the bar is greater than the distance between the second plane and the axis of the bar, and a cutting surface is disposed between the first plane and the second plane, and the cutting surface is used for abutting against the tool holder.

18. The cold header of claim 16, wherein said cutter structure further comprises an eccentric adjustment shaft threadedly coupled to said seat, said eccentric adjustment shaft comprising a shaft body and an eccentric portion for abutting said cutter bar.

19. The cold header of claim 8, wherein the header driving structure comprises:

20. The cold header of claim 19, wherein said second header unit further comprises:

the ejection rocker arm seat is arranged on the lathe bed;

the driving block is rotationally connected to the liftout rocker arm seat;

21. The cold header of claim 8, wherein the second ejector unit further comprises a second elastic member, the second elastic member is mounted in the main die box, one end of the second elastic member abuts against the main die box, and the other end abuts against the ejector die.