Automatic cold header

Abstract

The invention relates to the technical field of cold headers, in particular to an automatic cold header. An automatic cold header comprises a first driving mechanism and a clamping mechanism. The clamping mechanism comprises a limiting barrel, a first clamping rod and a second clamping rod. The first driving mechanism drives the limiting barrel to move from the first position to the second position, the first material clamping rod and the second material clamping rod drive the workpiece to be brought into the next cavity from the mold closing seam in the previous cavity, the workpiece does not need to be completely pulled out of the cavity, and therefore when workpieces of different lengths are machined, the machining efficiency is improved. And the length of the workpiece does not interfere with the first crankshaft any more, so that the radius of the first crankshaft does not need to be adjusted, and the adaptability is wider. The invention provides an automatic cold header to solve the problems that when an existing cold header machines workpieces, the adaptability of a crankshaft is poor, and the existing cold header cannot be suitable for workpieces with different lengths.

Description

Technical Field

[0001] The present invention relates to the technical field of cold heading machines, and particularly relates to an automatic cold heading machine. Background Art

[0002] A cold heading machine mainly uses "heading pressure". By applying pressure to a metal blank through a die, plastic deformation is generated at normal temperature to form fasteners (such as bolt heads, nut blanks, etc.). A cold heading machine is a special device dedicated to batch production of fasteners (such as bolts, nuts, rivets, etc.) at normal temperature through plastic deformation, integrating cold heading technology and multi-station automation technology. Utilizing the theory of metal plastic deformation, through multi-station continuous processing (such as cutting, ball pressing, punching, forming, etc.), a coil or bar stock is directly formed into a fastener, reducing machining.

[0003] For example, the invention patent with the publication number CN110695284B provides a cold heading machine. By using the driving force provided at different ends of the main shaft, the first eccentric wheel is driven to rotate, and thus the eccentric rotation is converted into the reciprocating swing of the first driven arm through the first transmission arm, thereby driving the driving shaft to reciprocate and rotate, and then driving the second transmission sleeve that is circumferentially linked with the driving shaft to reciprocate and rotate. It can change the mold closing moment and duration of the cold heading die except for the last one through different eccentric wheels, better adapting to cold heading processing. However, when this cold heading machine produces workpieces of different lengths, it is often necessary to completely pull out the workpiece from the cavity, and at this time, a crankshaft with a matching diameter is required. For example, when cold heading short rods, a crankshaft with a smaller reciprocating stroke is needed. When cold heading long rods, a crankshaft with a larger reciprocating stroke is needed. The crankshaft with a smaller reciprocating stroke will interfere with the workpiece, and the working interval is longer, resulting in lower working efficiency. Therefore, the adaptability of the crankshaft is poor and it cannot be applied to workpieces of different lengths. And when moving the workpiece from the previous cavity to the next cavity, it is often necessary to completely pull out the workpiece from the cavity. For longer workpieces, when pulling out the workpiece, the contact area between the workpiece and the cavity is larger and the wear is also greater. Summary of the Invention

[0004] The present invention provides an automatic cold heading machine to solve the problem that the adaptability of the crankshaft of the existing cold heading machine is poor and it cannot be applied to workpieces of different lengths during workpiece processing.

[0005] The automatic cold heading machine of the present invention adopts the following technical solutions: An automatic cold heading machine includes a housing, an upper die, a lower die, a first driving mechanism, a stamping mechanism, and a plurality of clamping mechanisms. The lower die is arranged on the housing, the upper die is located above the lower die and can move relative to the lower die. The upper die and the lower die are mutually buckled to form a plurality of cavities for placing workpieces. The plurality of cavities are distributed along a first direction, and the first direction is the horizontal direction. Along the first direction, the workpiece sequentially passes through the plurality of cavities.

[0006] A plurality of clamping mechanisms are distributed along a first direction. Each clamping mechanism includes a limiting cylinder, a first material clamping rod, and a second material clamping rod. The upper die drives the limiting cylinder to move up and down synchronously, and the limiting cylinder can move on a horizontal plane. The limiting cylinder has a first position and a second position, and the first position and the second position of the limiting cylinder correspond to two adjacent cavities respectively. Along the direction in which the workpiece moves, the first position of the limiting cylinder is behind the second position. The first material clamping rod and the second material clamping rod are slidably arranged in the limiting cylinder. After the upper die and the lower die move away from each other, a first driving mechanism drives the limiting cylinder to move from the first position to the second position, and the first material clamping rod and the second material clamping rod clamp the workpiece and drive the workpiece to move from the mold closing seam of the previous cavity to the next cavity.

[0007] The stamping mechanism includes a first crankshaft and a punch, and the first crankshaft drives the punch to extrude the workpiece in the cavity.

[0008] Further, the first material clamping rod and the second material clamping rod are sequentially distributed along the first direction. Along the first direction, a first fixed wedge block and a second fixed wedge block are fixedly arranged on one side of the first material clamping rod close to the second material clamping rod, and the first fixed wedge block is above the second fixed wedge block. A first inclined surface is formed on the first fixed wedge block, and a second inclined surface is formed on the second fixed wedge block. Along the direction from the two vertical ends to the middle of the first material clamping rod, the first inclined surface and the second inclined surface gradually approach the first material clamping rod.

[0009] Each clamping mechanism further includes an adjusting assembly, and the adjusting assembly includes a first sliding wedge block, a second sliding wedge block, a first compression spring, a second compression spring, a friction block, and an induction unit. The first sliding wedge block and the second sliding wedge block are both slidably arranged on the second material clamping rod, and the first sliding wedge block is above the second sliding wedge block. The second compression spring connects the first sliding wedge block and the second sliding wedge block. A third inclined surface that abuts against the first inclined surface is formed on the first sliding wedge block, and the third inclined surface is arranged parallel to the first inclined surface. A fourth inclined surface that abuts against the second inclined surface is formed on the second sliding wedge block, and the fourth inclined surface is arranged parallel to the second inclined surface.

[0010] The friction block is slidably arranged on the second material clamping rod, and the friction block is between the first sliding wedge block and the first material clamping rod. The friction block is used to abut against the workpiece. The first compression spring connects the first sliding wedge block and the friction block. In the initial state, the induction unit restricts the up and down movement of the friction block.

[0011] Further, along the first direction, a rod clamping block is also fixedly arranged on one side of the first material clamping rod close to the second material clamping rod, and the rod clamping block is between the first fixed wedge block and the second fixed wedge block. Two relatively arranged fifth inclined surfaces are formed on the rod clamping block, and the fifth inclined surfaces are in contact with the workpiece. An installation groove is formed on the friction block.

[0012] The sensing unit includes a sensing block and a third compression spring. The sensing block is slidably arranged on the second clamping rod along the first direction, and the sensing block is located below the friction block. A first connecting rod is fixedly arranged on the sensing block, and the first connecting rod is slidably arranged in the mounting groove along the first direction. One side of the sensing block is used to abut against the workpiece, and a sliding limiting rod is fixedly arranged on the other side of the sensing block. The sliding limiting rod is used to abut against the lower side of the friction block.

[0013] The sensing unit has a third position and a fourth position. The third position of the sensing unit is that the sliding limiting rod abuts against the friction block, and the side of the sensing block that abuts against the workpiece is closer to the first clamping rod than the side of the friction block that abuts against the workpiece. The fourth position of the sensing unit is that the sliding limiting rod is disengaged from the friction block, and the side of the sensing block that abuts against the workpiece is in the same vertical plane as the side of the friction block that abuts against the workpiece.

[0014] Further, each clamping mechanism further includes a pressing rod, a first hinge rod, a second hinge rod, and two special-shaped pressing blocks. The pressing rod is arranged vertically, and the pressing rod is slidably arranged up and down in the limiting cylinder. Two first connecting shafts are fixedly arranged on the limiting cylinder, and the two first connecting shafts are distributed in sequence along the first direction. Each first connecting shaft is arranged along the second direction, and the second direction is the horizontal direction and is perpendicular to the first direction. A second connecting shaft is fixedly arranged at the lower end of the pressing rod, and the second connecting shaft is arranged along the second direction.

[0015] The upper side of the special-shaped pressing block abuts against the lower end of the pressing rod. The two special-shaped pressing blocks are distributed in sequence along the second direction, and both of the two special-shaped pressing blocks are rotatably connected to the second connecting shaft. Each special-shaped pressing block is respectively rotatably connected to a first connecting shaft.

[0016] The first hinge rod and the second hinge rod are arranged in a cross shape, and the middle parts of the first hinge rod and the second hinge rod are hinged to each other. Third connecting shafts are fixedly arranged at the upper ends of the first hinge rod and the second hinge rod, and the third connecting shafts are arranged along the second direction. Each third connecting shaft is rotatably connected to a special-shaped pressing block.

[0017] A first sliding groove is formed in the first clamping rod along the vertical direction, and a second sliding groove is formed in the second clamping rod along the vertical direction. The lower end of the first hinge rod is rotatably connected to the first clamping rod, and a first limiting rod is fixedly arranged on the first hinge rod. The first limiting rod is arranged along the second direction. The first limiting rod is slidably arranged in the second sliding groove. The lower end of the second hinge rod is rotatably connected to the second clamping rod, and a second limiting rod is fixedly arranged on the second hinge rod. The second limiting rod is arranged along the second direction, and the second limiting rod is slidably arranged in the first sliding groove.

[0018] Further, a end cap is fixedly arranged at the upper end of each limiting cylinder. Each clamping mechanism further includes a fourth compression spring. The fourth compression spring connects the limiting cylinder and the pressing rod. An extrusion plate is fixedly arranged on the housing, and the extrusion plate is located above the clamping mechanism. The extrusion plate is used to abut against the upper ends of the pressing rods in a plurality of limiting cylinders.

[0019] Further, a second cylinder is fixedly arranged on the housing. The lower mold is fixedly arranged on the housing, and the upper mold is arranged in the housing so as to move up and down. An installation box is fixedly arranged on the upper side surface of the upper mold, and the extending end of the second cylinder is fixedly connected to the installation box. A plurality of hinge shafts are arranged in the installation box. Each hinge shaft is arranged vertically, and the plurality of hinge shafts are distributed in sequence along the first direction. A feeding connecting rod is arranged on each hinge shaft. One end of the feeding connecting rod is rotatably connected to the hinge shaft, and the other end of the feeding connecting rod is fixedly provided with a connecting cylinder. The connecting cylinder is arranged vertically, and each limiting cylinder is fixedly arranged in a connecting cylinder.

[0020] The first driving mechanism includes a first motor, a second crankshaft, a first connecting rod and a sliding connecting rod. The first motor is fixedly arranged on the housing. The axis of the second crankshaft is arranged vertically, and the second crankshaft is fixedly connected to the output shaft of the first motor. One end of the first connecting rod is rotatably connected to the second crankshaft, and the other end of the first connecting rod is rotatably connected to the sliding connecting rod. A plurality of limiting grooves are formed in the sliding connecting rod, and the plurality of limiting grooves are distributed in sequence along the first direction. Each connecting cylinder is slidably arranged in a limiting groove.

[0021] Further, a plurality of first cylinders are fixedly arranged on the housing. The extending end of each first cylinder is fixedly provided with a push rod. The push rod is arranged along the second direction, and each push rod is arranged in a cavity.

[0022] Further, along the first direction, the two sides of the housing are respectively a first side and a second side, and the workpiece moves along the direction from the first side of the housing to the second side. Among them, the cavity on the first side of the housing is a material storage cavity, and the other cavities are installation cavities.

[0023] The stamping mechanism and the clamping mechanism are distributed in sequence along the second direction. The stamping mechanism further includes a second motor, a second connecting rod and a slider. The first crankshaft is arranged along the first direction, and the first crankshaft is rotatably arranged on the housing. The second motor is fixedly arranged on the housing, and the output shaft of the second motor is fixedly connected to the first crankshaft.

[0024] The second connecting rod is arranged along the second direction, and one end of the second connecting rod is rotatably connected to the first crankshaft. One side of the slider is rotatably connected to the other end of the second connecting rod. There are a plurality of punches, and the punches are fixedly arranged on the slider. The plurality of punches are distributed in sequence along the first direction, and the punches correspond to the installation cavities one by one.

[0025] Further, an automatic cold heading machine further includes a feeding mechanism, and the feeding mechanism and the clamping mechanism are sequentially distributed along the direction from the first side to the second side of the housing. The feeding mechanism includes two third motors and two conveying wheels. The third motors are fixedly arranged on the housing, the two third motors are sequentially distributed along the first direction, and each conveying wheel is fixedly arranged on a third motor. The two conveying wheels are sequentially distributed along the first direction, the axis of the conveying wheel is arranged along the second direction, and the conveying wheel can rotate along its own axis. The rotation directions of the two conveying wheels are opposite, the workpiece is arranged along the second direction, and the workpiece passes between the two conveying wheels.

[0026] Further, an automatic cold heading machine further includes a cutting mechanism. The cutting mechanism is located on the first side of the housing. The cutting mechanism includes an electric cylinder and a cutting knife. The electric cylinder is fixedly arranged on the housing, the cutting knife is fixedly connected to the extending end of the electric cylinder, and the cutting knife is used for cutting the workpiece conveyed by the feeding mechanism. And the cutting knife is located at the material storage cavity.

[0027] The beneficial effects of the present invention are as follows: For an automatic cold heading machine of the present invention, through the provided clamping mechanism, in the initial state, the limiting cylinder is in the first position. The material is in a cavity. The upper die first moves upward, and the mold clamping seam between the upper die and the lower die gradually increases. Then the workpiece is clamped by the first clamping rod and the second clamping rod. The upper die drives the limiting cylinder to move upward synchronously, so that the workpiece is separated from the lower die. Then the first driving mechanism drives the limiting cylinder to move from the first position to the second position. The first clamping rod and the second clamping rod drive the workpiece to be brought from the mold clamping seam in the previous cavity to the next cavity, and finally the workpiece is released. After the workpiece passes through multiple cavities in sequence, the processing of the workpiece is completed.

[0028] The first clamping rod and the second clamping rod drive the workpiece to be brought from the mold clamping seam in the previous cavity to the next cavity, without the need for the workpiece to be completely pulled out along the second direction from the previous cavity, avoiding a large contact area between the workpiece and the cavity, thereby causing excessive wear. And when processing workpieces of different lengths, since the workpiece does not need to be completely pulled out along the second direction from the previous cavity, the length of the workpiece no longer interferes with the first crankshaft, so there is no need to adjust the radius of the first crankshaft, and its adaptability is wider. And through the opening and closing of the upper die and the lower die, the material is moved from the mold clamping seam, and it can also be applied when processing special-shaped workpieces, similar to a split mold, so the range of cold heading workpieces is larger. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 Schematic diagram of the structure of an automatic cold heading machine provided by an embodiment of the present invention; Figure 2 Schematic diagram of the structure of an automatic cold heading machine after removing the outer shell provided by an embodiment of the present invention; Figure 3 Cross-sectional view of an automatic cold heading machine provided by an embodiment of the present invention; Figure 4 For Figure 3 Enlarged view of part A in Figure 5 Partial structure schematic diagram of an automatic cold heading machine provided by an embodiment of the present invention; Figure 6 Schematic diagram of another perspective of a partial structure of an automatic cold heading machine provided by an embodiment of the present invention; Figure 7 Schematic diagram of the structure of the clamping mechanism of an automatic cold heading machine provided by an embodiment of the present invention; Figure 8 Exploded view of the clamping mechanism of an automatic cold heading machine provided by an embodiment of the present invention; Figure 9 For Figure 8 Enlarged view of part B in Figure 10 Partial structure schematic diagram of the clamping mechanism of an automatic cold heading machine provided by an embodiment of the present invention; Figure 11 Cross-sectional view of the clamping mechanism of an automatic cold heading machine provided by an embodiment of the present invention; Figure 12 For Figure 11 Enlarged view of part C in

[0031] In the figure: 100, outer shell; 103, first crankshaft; 104, second connecting rod; 105, slider; 1051, punch; 109, sliding connecting rod; 111, second cylinder; 112, extrusion plate; 115, upper die; 1152, discharge port; 116, feeding connecting rod; 1161, hinge shaft; 117, lower die; 118, storage cavity; 119, installation cavity; 120, installation box; 130, connecting cylinder; 201, limiting cylinder; 202, end cover; 203, pressing rod; 205, fourth compression spring; 206, special-shaped pressing block; 2061, first connecting shaft; 2062, second connecting shaft; 2063, third connecting shaft; 207, first hinge rod; 209, first clamping rod; 2091, first chute; 2092, first fixed wedge block; 2093, rod clamping block; 2094, second fixed wedge block; 210, first sliding wedge block; 211, friction block; 2111, installation groove; 212, first compression spring; 213, second sliding wedge block; 215, induction block; 2151, third compression spring; 2152, sliding limiting rod; 2153, first connecting rod; 216, second compression spring; 220, second clamping rod; 300, cutting knife; 310, limiting plate. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Referring to Figures 1 to 12 As shown, an automatic cold heading machine provided in an embodiment of the present invention includes an outer shell 100, an upper die 115, a lower die 117, a first driving mechanism, a stamping mechanism, and a plurality of clamping mechanisms. The lower die 117 is fixedly arranged on the outer shell 100, the upper die 115 is arranged to move up and down within the outer shell 100, the upper die 115 is located above the lower die 117, and the upper die 115 and the lower die 117 are mutually buckled to form a plurality of cavities for placing workpieces. The plurality of cavities are sequentially distributed along a first direction, and the first direction is the horizontal direction. Along the first direction, the workpieces sequentially pass through the plurality of cavities.

[0034] A plurality of clamping mechanisms are sequentially distributed along a first direction. Each clamping mechanism includes a limiting cylinder 201, a first material clamping rod 209, and a second material clamping rod 220. The limiting cylinder 201 is vertically arranged in the housing 100. The upper die 115 can drive the limiting cylinder 201 to move up and down synchronously, and the limiting cylinder 201 can move on a horizontal plane. Each limiting cylinder 201 has a first position and a second position, and the first position and the second position of the limiting cylinder 201 respectively correspond to two adjacent cavities one by one. Along the moving direction of the workpiece, the first position of the limiting cylinder 201 is at the rear side of the second position. The first material clamping rod 209 and the second material clamping rod 220 are slidably arranged in the limiting cylinder 201, and the first material clamping rod 209 and the second material clamping rod 220 clamp the workpiece by approaching each other.

[0035] After the upper die 115 and the lower die 117 move away from each other, the first driving mechanism drives the limiting cylinder 201 to move from the first position to the second position, and the first material clamping rod 209 and the second material clamping rod 220 drive the workpiece to move from the mold closing seam of the previous cavity to the next cavity. The stamping mechanism includes a first crankshaft 103 and a punch 1051, and the first crankshaft 103 drives the punch 1051 to extrude the workpiece in the cavity.

[0036] In the initial state, the limiting cylinder 201 is in the first position. The material is in one cavity. The upper die 115 first moves upward, and the mold closing seam between the upper die 115 and the lower die 117 gradually increases. Then the workpiece is clamped by the first material clamping rod 209 and the second material clamping rod 220, and the upper die 115 drives the limiting cylinder 201 to move upward synchronously, so that the workpiece is separated from the lower die 117. Then the first driving mechanism drives the limiting cylinder 201 to move from the first position to the second position, and the first material clamping rod 209 and the second material clamping rod 220 drive the workpiece from the mold closing seam in the previous cavity to the next cavity, and finally the workpiece is released. After the workpiece passes through a plurality of cavities in sequence, the processing of the workpiece is completed.

[0037] The first material clamping rod 209 and the second material clamping rod 220 drive the workpiece from the mold closing seam in the previous cavity to the next cavity, and it is not necessary for the workpiece to be completely pulled out along a second direction from the previous cavity, avoiding a large contact area between the workpiece and the cavity, thereby causing excessive wear. And when processing workpieces of different lengths, since it is not necessary for the workpiece to be completely pulled out along the second direction from the previous cavity, the length of the workpiece no longer interferes with the first crankshaft 103, so it is not necessary to adjust the radius of the first crankshaft 103, and its adaptability is wider. And through the opening and closing of the upper die 115 and the lower die 117, the material is moved from the mold closing seam, and it can also be applied when processing special-shaped workpieces, similar to a half mold, so the range of cold-heading workpieces is larger.

[0038] In this embodiment, the first clamping rod 209 and the second clamping rod 220 are sequentially distributed along the first direction. Along the first direction, on the side of the first clamping rod 209 close to the second clamping rod 220, a first fixed wedge 2092 and a second fixed wedge 2094 are fixedly arranged, and the first fixed wedge 2092 is on the upper side of the second fixed wedge 2094. A first inclined surface is formed on the first fixed wedge 2092, and a second inclined surface is formed on the second fixed wedge 2094. Along the direction from the two vertical ends to the middle of the first clamping rod 209, the first inclined surface and the second inclined surface gradually approach the first clamping rod 209.

[0039] Each clamping mechanism further includes an adjusting assembly, and the adjusting assembly includes a first sliding wedge 210, a second sliding wedge 213, a first compression spring 212, a second compression spring 216, a friction block 211 and an induction unit. The first sliding wedge 210 and the second sliding wedge 213 are both arranged on the second clamping rod 220 to slide up and down, and the first sliding wedge 210 is on the upper side of the second sliding wedge 213. The second compression spring 216 connects the first sliding wedge 210 and the second sliding wedge 213. A third inclined surface that abuts against the first inclined surface is formed on the first sliding wedge 210, and the third inclined surface is arranged parallel to the first inclined surface. A fourth inclined surface that abuts against the second inclined surface is formed on the second sliding wedge 213, and the fourth inclined surface is arranged parallel to the second inclined surface.

[0040] The friction block 211 is arranged on the second clamping rod 220 to slide up and down. The friction block 211 is between the first sliding wedge 210 and the first clamping rod 209, and the friction block 211 is used to abut against the workpiece. The first compression spring 212 connects the first sliding wedge 210 and the friction block 211. In the initial state, the induction unit restricts the up and down movement of the friction block 211.

[0041] In this embodiment, along the first direction, a rod clamping block 2093 is further fixedly arranged on the side of the first clamping rod 209 close to the second clamping rod 220. The rod clamping block 2093 is between the first fixed wedge 2092 and the second fixed wedge 2094. Two relatively arranged fifth inclined surfaces are formed on the rod clamping block 2093, and the fifth inclined surfaces are in contact with the workpiece. Along the direction from the two vertical ends to the middle of the rod clamping block 2093, the fifth inclined surfaces gradually approach the first clamping rod 209. An installation groove 2111 is formed on the friction block 211, and along the first direction, the installation groove 2111 penetrates through the friction block 211.

[0042] The sensing unit includes a sensing block 215 and a third compression spring 2151. The sensing block 215 is slidably disposed on the second clamping rod 220 along a first direction. The sensing block 215 is located below the friction block 211 and is between the second sliding wedge block 213 and the first clamping rod 209. A first connecting rod 2153 is fixedly disposed on the sensing block 215. The first connecting rod 2153 is slidably disposed in the mounting groove 2111 along the first direction. One side of the sensing block 215 is used to abut against the workpiece, and a sliding limiting rod 2152 is fixedly disposed on the other side of the sensing block 215. The sliding limiting rod 2152 is used to abut against the lower side of the friction block 211.

[0043] The sensing unit has a third position and a fourth position. The third position of the sensing unit is that the sliding limiting rod 2152 abuts against the friction block 211, and the side of the sensing block 215 that abuts against the workpiece is closer to the first clamping rod 209 than the side of the friction block 211 that abuts against the workpiece. The fourth position of the sensing unit is that the sliding limiting rod 2152 is out of contact with the friction block 211, and the side of the sensing block 215 that abuts against the workpiece and the side of the friction block 211 that abuts against the workpiece are in the same vertical plane.

[0044] In the initial state, the sensing unit is in the third position, and the sensing block 215 restricts the downward movement of the friction block 211. When the first clamping rod 209 and the second clamping rod 220 approach each other until the sensing block 215 contacts the workpiece, the workpiece presses the sensing block 215, the sensing block 215 moves away from the workpiece, the third compression spring 2151 is compressed, and the sliding limiting rod 2152 is out of contact with the lower side of the friction block 211. The friction block 211 moves downward. The friction block 211 contacts the workpiece, and under the limitation of the rod clamping block 2093, when the friction block 211 moves downward, it drives the workpiece to rotate, thereby changing the position where the workpiece contacts the mold joint of the upper mold 115 and the lower mold 117, and preventing the mold line generated on the workpiece due to the mold joint from affecting the product quality.

[0045] By changing the inclination angles of the first inclined surface, the second inclined surface, the third inclined surface and the fourth inclined surface, the downward movement distance of the friction block 211 can be changed, thereby changing the rotation angle of the friction block 211 driving the material. For example, when the workpiece is a regular hexagon, the friction block 211 drives the material to rotate 60° each time.

[0046] In this embodiment, each clamping mechanism further includes a pressure rod 203, a first hinge rod 207, a second hinge rod, and two special-shaped pressing blocks 206. The pressure rod 203 is vertically arranged and is slidably arranged up and down in the limiting cylinder 201. Two first connecting shafts 2061 are fixedly arranged on the limiting cylinder 201, and the two first connecting shafts 2061 are distributed in sequence along the first direction. Each first connecting shaft 2061 is arranged along the second direction, the second direction is the horizontal direction, and the second direction is perpendicular to the first direction. The lower end of the pressure rod 203 is fixedly provided with a second connecting shaft 2062, and the second connecting shaft 2062 is arranged along the second direction.

[0047] The upper side of the special-shaped pressing block 206 abuts against the lower end of the pressure rod 203. The two special-shaped pressing blocks 206 are distributed in sequence along the second direction, and both of the two special-shaped pressing blocks 206 are rotatably connected to the second connecting shaft 2062. Each special-shaped pressing block 206 is respectively rotatably connected to a first connecting shaft 2061.

[0048] The first hinge rod 207 and the second hinge rod are cross-arranged, and the middle parts of the first hinge rod 207 and the second hinge rod are hinged to each other. The upper ends of the first hinge rod 207 and the second hinge rod are both fixedly provided with third connecting shafts 2063, and the third connecting shafts 2063 are arranged along the second direction. Each third connecting shaft 2063 is rotatably connected to a special-shaped pressing block 206.

[0049] A first sliding groove 2091 is arranged on the first material clamping rod 209 along the vertical direction, and a second sliding groove is arranged on the second material clamping rod 220 along the vertical direction. The lower end of the first hinge rod 207 is rotatably connected to the first material clamping rod 209, and a first limiting rod is fixedly arranged on the first hinge rod 207, and the first limiting rod is arranged along the second direction. The first limiting rod is slidably arranged in the second sliding groove. The lower end of the second hinge rod is rotatably connected to the second material clamping rod 220, and a second limiting rod is fixedly arranged on the second hinge rod, and the second limiting rod is arranged along the second direction. The second limiting rod is slidably arranged in the first sliding groove 2091. Under the limitation of the first sliding groove 2091 and the second sliding groove, the first material clamping rod 209 and the second material clamping rod 220 can move along the vertical direction.

[0050] In this embodiment, a end cover 202 is fixedly arranged at the upper end of each limiting cylinder 201. A retaining ring is fixedly arranged on the pressure rod 203, and the retaining ring and the pressure rod 203 are coaxially arranged. The retaining ring is used to abut against the end cover 202. Each clamping mechanism further includes a fourth compression spring 205. The fourth compression spring 205 connects the limiting cylinder 201 and the retaining ring. An extrusion plate 112 is fixedly arranged on the housing 100, and the extrusion plate 112 is located above the clamping mechanism. The extrusion plate 112 is used to abut against the upper ends of the pressure rods 203 in a plurality of limiting cylinders 201. After the limiting cylinder 201 moves upward until the pressure rod 203 contacts the extrusion plate 112, the pressure rod 203 moves downward relative to the limiting cylinder 201.

[0051] In this embodiment, a second cylinder 111 is fixedly arranged on the outer shell 100. The lower mold 117 is fixedly arranged on the outer shell 100, and the upper mold 115 is arranged in the outer shell 100 so as to move up and down. An installation box 120 is fixedly arranged on the upper side surface of the upper mold 115, and the extending end of the second cylinder 111 is fixedly connected to the installation box 120. A plurality of hinge shafts 1161 are arranged in the installation box 120, each hinge shaft 1161 is arranged vertically, and the plurality of hinge shafts 1161 are distributed in sequence along the first direction. A feeding connecting rod 116 is arranged on each hinge shaft 1161. One end of the feeding connecting rod 116 is rotatably connected to the hinge shaft 1161, and the other end of the feeding connecting rod 116 is fixedly provided with a connecting cylinder 130. The connecting cylinder 130 is arranged vertically, and each limiting cylinder 201 is fixedly arranged in a connecting cylinder 130.

[0052] The first driving mechanism includes a first motor, a second crankshaft, a first connecting rod and a sliding connecting rod 109. The first motor is fixedly arranged on the outer shell 100. The axis of the second crankshaft is arranged vertically, and the second crankshaft is fixedly connected to the output shaft of the first motor. One end of the first connecting rod is rotatably connected to the second crankshaft, and the other end of the first connecting rod is rotatably connected to the sliding connecting rod 109. A plurality of limiting grooves are formed in the sliding connecting rod 109, and the plurality of limiting grooves are distributed in sequence along the first direction. Each connecting cylinder 130 is slidably arranged in a limiting groove.

[0053] In this embodiment, a plurality of first semi-circular grooves are formed in the upper mold 115, and the plurality of first semi-circular grooves are distributed in sequence along the first direction. A plurality of second semi-circular grooves are formed in the lower mold 117, and the plurality of second semi-circular grooves are distributed in sequence along the first direction. The first semi-circular grooves and the second semi-circular grooves are in one-to-one correspondence. Each first semi-circular groove and a second semi-circular groove form a cavity. The clamping mechanism is located at one end of the cavity along the second direction.

[0054] A plurality of first cylinders are fixedly arranged on the outer shell 100. The extending end of each first cylinder is fixedly provided with a push rod. The push rod is arranged along the second direction, and each push rod is arranged in a cavity.

[0055] In this embodiment, along the first direction, the two sides of the outer shell 100 are respectively the first side and the second side, and the workpiece moves along the direction from the first side of the outer shell 100 to the second side. Among them, the cavity on the first side of the outer shell 100 is a storage cavity 118, and the other cavities are installation cavities 119. And along the second direction, the distance between the side of the storage cavity 118 close to the clamping mechanism and the clamping mechanism is greater than the distance between the side of the installation cavity 119 close to the clamping mechanism and the clamping mechanism. An outlet 1152 is formed on the second side of the outer shell 100.

[0056] The stamping mechanism and the clamping mechanism are sequentially distributed along the second direction. The stamping mechanism further includes a second motor, a second connecting rod 104, and a slider 105. The first crankshaft 103 is arranged along the first direction, the first crankshaft 103 is rotatably arranged on the housing 100, the second motor is fixedly arranged on the housing 100, and the output shaft of the second motor is fixedly connected to the first crankshaft 103.

[0057] The second connecting rod 104 is arranged along the second direction, and one end of the second connecting rod 104 is rotatably connected to the first crankshaft 103. One side of the slider 105 is rotatably connected to the other end of the second connecting rod 104. There are multiple punch heads 1051, the punch heads 1051 are fixedly arranged on the slider 105, the multiple punch heads 1051 are sequentially distributed along the first direction, and the punch heads 1051 correspond to the installation cavities 119 one by one.

[0058] In this embodiment, an automatic cold heading machine further includes a feeding mechanism, and the feeding mechanism and the clamping mechanism are sequentially distributed along the direction from the first side to the second side of the housing 100. The feeding mechanism includes two third motors and two conveying wheels. The third motors are fixedly arranged on the housing 100, the two third motors are sequentially distributed along the first direction, and each conveying wheel is fixedly arranged on a third motor. The two conveying wheels are sequentially distributed along the first direction, the axis of the conveying wheel is arranged along the second direction, and the conveying wheel can rotate along its own axis. The rotation directions of the two conveying wheels are opposite, the workpiece is arranged along the second direction, the workpiece passes between the two conveying wheels, and the workpiece is transported into the storage cavity 118.

[0059] In this embodiment, an automatic cold heading machine further includes a cutting mechanism. The cutting mechanism is located on the first side of the housing 100. The cutting mechanism includes an electric cylinder, a cutting knife 300, and a limiting plate 310. The electric cylinder is fixedly arranged on the housing 100, the cutting knife 300 is fixedly connected to the extending end of the electric cylinder, and the cutting knife 300 is used for cutting the workpiece conveyed by the feeding mechanism. And the cutting knife 300 is located at the storage cavity 118. The limiting plate 310 is fixedly arranged on the housing 100. Along the second direction, the limiting plate 310 is located between the cavity and the cutting knife 300. A limiting semi-circular groove is formed on the limiting plate 310, and the limiting semi-circular groove is used for abutting against the workpiece.

[0060] Working process: In the initial state, the limiting cylinder 201 is in the first position. The sensing unit is in the third position. The first fixed wedge 2092 and the first sliding wedge 210 are not in contact. The second fixed wedge 2094 and the second sliding wedge 213 are not in contact. The upper die 115 and the lower die 117 are in contact.

[0061] Start the third motor, and the two conveying wheels rotate, thereby conveying the workpiece into the storage cavity 118. In the initial state, the limiting cylinder 201 is in the first position, and the limiting cylinder 201 near the first side of the outer shell 100 corresponds to the storage cavity 118. Then start the second cylinder 111, and the second cylinder 111 drives the mounting box 120 and the upper mold 115 to move upward. When the upper mold 115 moves upward, the first semi-circular groove and the second semi-circular groove move away from each other. At the same time, the mounting box 120 drives a plurality of limiting cylinders 201 to move upward synchronously through a plurality of feeding connecting rods 116. The limiting cylinder 201 drives the first clamping rod 209 and the second clamping rod 220 to move upward synchronously.

[0062] When the limiting cylinder 201 drives the pressing rod 203 to rise until it abuts against the pressing plate 112, the pressing rod 203 moves downward relative to the limiting cylinder 201, and the fourth compression spring 205 is compressed. The pressing rod 203 pushes the special-shaped pressing block 206 to rotate around the first connecting shaft 2061 respectively. At this time, the special-shaped pressing block 206 drives the first hinge rod 207 and the second hinge rod to move downward through the third connecting shaft 2063. Since the first hinge rod 207 and the second hinge rod are hinged to each other, while the first hinge rod 207 and the second hinge rod move downward, the lower ends of the first hinge rod 207 and the second hinge rod approach each other. The first hinge rod 207 and the second hinge rod drive the first clamping rod 209 and the second clamping rod 220 to approach each other.

[0063] After the first clamping rod 209 and the second clamping rod 220 approach each other until the rod clamping block 2093 abuts against the workpiece, at this time, the first clamping rod 209 and the second clamping rod 220 clamp the workpiece. At this time, the workpiece will not come out of the first clamping rod 209 and the second clamping rod 220, but the workpiece is not clamped tightly, and the first clamping rod 209 and the second clamping rods clamp the end of the workpiece away from the cutting tool 300. Under the action of the limiting semi-circular groove and the rod clamping block 2093, the workpiece is preliminarily positioned. Start the electric cylinder to move reciprocally and drive the cutting tool 300, and the cutting tool 300 cuts the workpiece to the target length.

[0064] After cutting the workpiece, the limiting cylinder 201 continues to move upward, and drives the first clamping rod 209 and the second clamping rod 220 to move upward. The first clamping rod 209 and the second clamping rod 220 drive the workpiece to move upward, so that the workpiece is separated from contact with the second semi-circular groove.

[0065] At the same time, the pressing plate 112 continues to press down the pressing rod 203, so that the first clamping rod 209 and the second clamping rod 220 are further close to each other and clamp the workpiece. At this time, since the first clamping rod 209 and the second clamping rod 220 do not need to move a long distance from clamping the workpiece to clamping it tightly, the distance that the first clamping rod 209 and the second clamping rod 220 move downward relative to the limiting cylinder 201 is also small. The first clamping rod 209 and the second clamping rod 220 are still moving upward relative to the outer shell 100.

[0066] After clamping the workpiece, the first motor is started simultaneously. The first motor drives the second crankshaft to rotate, and drives the sliding connecting rod 109 to move through the first connecting rod. The sliding connecting rod 109 drives the limiting cylinder 201 to move from the first position to the second position. The first clamping rod 209 and the second clamping rod 220 drive the workpiece to move along the second direction, and directly move the workpiece from the storage cavity 118 to the installation cavity 119. Then, the second cylinder 111 is started, and the second cylinder 111 drives the installation box 120 and the upper die 115 to move downward. Under the action of the fourth compression spring 205, the first clamping rod 209 and the second clamping rod 220 move away from each other, and the workpiece is released.

[0067] Therefore, as a whole, the upper die 115 first moves upward, the first semi-circular groove and the second semi-circular groove move away from each other, and the mold clamping seam between the upper die 115 and the lower die 117 gradually increases. Then, after clamping the workpiece by the first clamping rod 209 and the second clamping rod 220, it moves upward by a certain distance until the first clamping rod 209 and the second clamping rod 220 clamp the workpiece. Then, the first clamping rod 209 and the second clamping rod 220 are horizontally moved to bring the workpiece from the mold clamping seam in the previous cavity to the next cavity, and finally the workpiece is released. After the workpiece passes through multiple cavities in sequence, it falls to the discharge port 1152 and is discharged from the discharge port 1152.

[0068] The second motor is started simultaneously. The second motor drives the first crankshaft 103 to rotate, and drives the slider 105 to move along the second direction through the second connecting rod 104. The slider 105 drives the punch 1051 to approach the workpiece and extrude the workpiece. After the processing is completed. Then, the first cylinder is started, and the first cylinder drives the push rod to move. The push rod pushes out a part of the workpiece to facilitate the first clamping rod 209 and the second clamping rod 220 to clamp the workpiece.

[0069] When producing workpieces of different lengths, it is often necessary to completely pull out the workpiece from the cavity. At this time, the first crankshaft 103 with a matching diameter needs to be used. For example, when cold-heading short rods, the first crankshaft 103 requires a smaller reciprocating stroke. When cold-heading long rods, the first crankshaft 103 requires a larger reciprocating stroke. The first crankshaft 103 with a large reciprocating stroke will interfere with the workpiece, and the working interval is long, and the working efficiency is low. Therefore, the adaptability of the first crankshaft 103 is poor and it cannot be applied to workpieces of different lengths.

[0070] And when moving the workpiece from the previous cavity to the next cavity, it is often necessary to completely pull out the workpiece from the cavity. For longer workpieces, when pulling out the workpiece, the contact area between the workpiece and the cavity is larger and the wear is also greater.

[0071] When the workpiece is moved from the previous cavity to the next cavity in the present invention, it is not necessary for the workpiece to be completely withdrawn from the previous cavity along the second direction. It is only necessary to withdraw the workpiece by a distance sufficient for the clamping mechanism to clamp the workpiece, so as to avoid a large contact area between the workpiece and the cavity, thereby causing excessive wear. When processing workpieces of different lengths, since it is not necessary for the workpiece to be completely withdrawn from the previous cavity along the second direction, the length of the workpiece no longer interferes with the first crankshaft 103, so it is not necessary to adjust the radius of the first crankshaft 103, and its adaptability is wider. In addition, by opening and closing the upper die 115 and the lower die 117, the material is moved from the mold closing seam. When processing special-shaped workpieces, similar to a half mold, it can also be applied, so the range of cold-heading workpieces is larger.

[0072] When the first fixed wedge block 2092 contacts the first sliding wedge block 210 and the second fixed wedge block 2094 contacts the second sliding wedge block 213, at this time, the first clamping rod 209 and the second clamping rod 220 have clamped the workpiece. Then the first clamping rod 209 and the second clamping rod 220 continue to approach each other. Under the cooperation of the first inclined surface and the third inclined surface, the first fixed wedge block 2092 pushes the first sliding wedge block 210 to move downward. Under the cooperation of the second inclined surface and the fourth inclined surface, the second fixed wedge block 2094 pushes the second sliding wedge block 213 to move upward. The first compression spring 212 and the second compression spring 216 are compressed.

[0073] When the first clamping rod 209 and the second clamping rod 220 approach each other until the sensing block 215 contacts the workpiece, the workpiece presses the sensing block 215, and the sensing block 215 moves away from the workpiece, and the third compression spring 2151 is compressed. The sliding limit rod 2152 is disengaged from the lower side of the friction block 211. At this time, the first clamping rod 209 and the second clamping rod 220 clamp the material, and under the action of the first compression spring 212 and gravity, the friction block 211 moves downward. The friction block 211 contacts the workpiece, and under the limit of the rod clamping block 2093, when the friction block 211 moves downward, it drives the workpiece to rotate, thereby changing the position where the workpiece contacts the mold closing seam of the upper die 115 and the lower die 117, and preventing the mold closing line generated by the mold closing seam on the workpiece from affecting the product quality.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automated cold heading machine, characterized in that: The invention comprises a housing, an upper mold, a lower mold, a first driving mechanism, a stamping mechanism and a plurality of clamping mechanisms; the lower mold is arranged on the housing, the upper mold is located above the lower mold and can move relative to the lower mold; the upper mold and the lower mold are buckled with each other to form a plurality of cavities for placing workpieces; the plurality of cavities are distributed along a first direction, which is a horizontal direction; along the first direction, the workpiece passes through the plurality of cavities in sequence; A plurality of clamping mechanisms are distributed along a first direction, and each clamping mechanism includes a limiting cylinder, a first clamping rod and a second clamping rod; the upper mold drives the limiting cylinder to move up and down synchronously, and the limiting cylinder can move in a horizontal plane; the limiting cylinder has a first position and a second position, and the first position and the second position of the limiting cylinder correspond to two adjacent cavities respectively; along the direction of movement of the workpiece, the first position of the limiting cylinder is at the rear side of the second position; the first clamping rod and the second clamping rod are slidably arranged in the limiting cylinder; after the upper mold and the lower mold move away from each other, the first driving mechanism drives the limiting cylinder to move from the first position to the second position, and the first clamping rod and the second clamping rod clamp the workpiece, and drive the workpiece to move from the mold seam of the previous cavity to the next cavity; The punching mechanism comprises a first crankshaft and a punch, and the first crankshaft drives the punch to press the workpiece in the cavity.

2. The automatic cold heading machine according to claim 1, characterized in that: The first material clamping rod and the second material clamping rod are sequentially distributed along the first direction; along the first direction, a first fixed wedge block and a second fixed wedge block are fixedly arranged on one side of the first material clamping rod close to the second material clamping rod, and the first fixed wedge block is located on the upper side of the second fixed wedge block; a first inclined surface is provided on the first fixed wedge block, and a second inclined surface is provided on the second fixed wedge block, and along the direction from both ends to the middle of the first material clamping rod in the vertical direction, the first inclined surface and the second inclined surface gradually approach the first material clamping rod; Each clamping mechanism also includes an adjusting component, which includes a first sliding wedge, a second sliding wedge, a first compression spring, a second compression spring, a friction block and a sensing unit; the first sliding wedge and the second sliding wedge are both slidably arranged on the second clamping rod, and the first sliding wedge is located on the upper side of the second sliding wedge; the second compression spring connects the first sliding wedge and the second sliding wedge; the first sliding wedge is provided with a third inclined surface that abuts against the first inclined surface, and the third inclined surface is arranged parallel to the first inclined surface; the second sliding wedge is provided with a fourth inclined surface that abuts against the second inclined surface, and the fourth inclined surface is arranged parallel to the second inclined surface; The friction block is slidably arranged on the second clamping rod, and is located between the first sliding wedge block and the first clamping rod. The friction block is used to abut against the workpiece. The first compression spring connects the first sliding wedge block and the friction block. In the initial state, the induction unit limits the upward and downward movement of the friction block.

3. An automated cold heading machine according to claim 2, characterized in that: Along the first direction, a rod clamping block is fixedly arranged on one side of the first clamping rod close to the second clamping rod, and the rod clamping block is located between the first fixed wedge block and the second fixed wedge block; two fifth inclined surfaces arranged opposite to each other are formed on the rod clamping block, and the fifth inclined surfaces are in contact with the workpiece; and a mounting groove is formed on the friction block; The sensing unit includes a sensing block and a third compression spring. The sensing block is slidably arranged on the second clamping rod along the first direction, and the sensing block is located at the lower side of the friction block. A first connecting rod is fixedly arranged on the sensing block, and the first connecting rod is slidably arranged in the mounting groove along the first direction. One side of the sensing block is used to abut against the workpiece, and a sliding limit rod is fixedly arranged on the other side of the sensing block. The sliding limit rod is used to abut against the lower side of the friction block. The sensing unit has a third position and a fourth position. The third position of the sensing unit is that the sliding limit rod and the friction block are in contact with each other, and the side where the sensing block and the workpiece are in contact is closer to the first clamping rod than the side where the friction block and the workpiece are in contact with each other. The fourth position of the sensing unit is that the sliding limit rod and the friction block are out of contact, and the side where the sensing block and the workpiece are in contact with each other is in the same vertical plane as the side where the friction block and the workpiece are in contact with each other.

4. The automatic cold heading machine according to claim 1, characterized in that: Each clamping mechanism also includes a pressure rod, a first hinge rod, a second hinge rod and two special-shaped pressure blocks; the pressure rod is vertically arranged, and the pressure rod is slidably arranged in the limit cylinder up and down, and two first connecting shafts are fixedly arranged on the limit cylinder, and the two first connecting shafts are sequentially distributed along the first direction, and each first connecting shaft is arranged along the second direction, and the second direction is horizontal, and the second direction is perpendicular to the first direction; the lower end of the pressure rod is fixedly arranged with a second connecting shaft, and the second connecting shaft is arranged along the second direction; The upper side of the special-shaped pressing block is against the lower end of the pressing rod; the two special-shaped pressing blocks are distributed in sequence along the second direction, and the two special-shaped pressing blocks are rotatably connected to the second connecting shaft; each special-shaped pressing block is rotatably connected to a first connecting shaft respectively; The first hinge rod and the second hinge rod are cross-arranged, and the middle parts of the first hinge rod and the second hinge rod are hinged to each other; the upper ends of the first hinge rod and the second hinge rod are fixedly provided with a third connecting shaft, and the third connecting shaft is arranged along the second direction; each third connecting shaft is rotatably connected to a special-shaped pressing block; The first clamping rod is provided with a first sliding groove arranged along the vertical direction, and the second clamping rod is provided with a second sliding groove arranged along the vertical direction; the lower end of the first hinged rod is rotatably connected to the first clamping rod, and a first limiting rod is fixedly arranged on the first hinged rod, and the first limiting rod is arranged along the second direction; the first limiting rod is slidably arranged in the second sliding groove up and down; the lower end of the second hinged rod is rotatably connected to the second clamping rod, and a second limiting rod is fixedly arranged on the second hinged rod, and the second limiting rod is arranged along the second direction, and the second limiting rod is slidably arranged in the first sliding groove up and down.

5. The automatic cold heading machine according to claim 4, characterized in that: An end cover is fixedly provided on the upper end of each limiting cylinder; each clamping mechanism also includes a fourth compression spring; the fourth compression spring connects the limiting cylinder and the pressure rod; an extrusion plate is fixedly provided on the outer shell, the extrusion plate is located on the upper side of the clamping mechanism, and the extrusion plate is used to abut against the upper ends of the pressure rods in the multiple limiting cylinders.

6. The automatic cold heading machine according to claim 1, characterized in that: A second cylinder is fixedly arranged on the shell; the lower mold is fixedly arranged on the shell, and the upper mold is arranged in the shell so as to move up and down; a mounting box is fixedly arranged on the upper side of the upper mold, and the extended end of the second cylinder is fixedly connected to the mounting box; a plurality of hinge shafts are arranged in the mounting box, each of which is arranged vertically, and the plurality of hinge shafts are sequentially distributed along the first direction; a feeding connecting rod is arranged on each hinge shaft, one end of the feeding connecting rod is rotatably connected to the hinge shaft, and a connecting cylinder is fixedly arranged on the other end of the feeding connecting rod, the connecting cylinder is arranged vertically, and each limiting cylinder is fixedly arranged in a connecting cylinder; The first driving mechanism includes a first motor, a second crankshaft, a first connecting rod and a sliding connecting rod. The first motor is fixedly arranged on the outer casing; the axis of the second crankshaft is vertically arranged, and the second crankshaft and the output shaft of the first motor are fixedly connected; one end of the first connecting rod is rotatably connected to the second crankshaft, and the other end of the first connecting rod is rotatably connected to the sliding connecting rod; a plurality of limit grooves are opened on the sliding connecting rod, and the plurality of limit grooves are distributed in sequence along the first direction; each connecting tube is slidably arranged in a limit groove.

7. The automatic cold heading machine according to claim 4, characterized in that: A plurality of first cylinders are fixedly arranged on the shell, a push rod is fixedly arranged at the extended end of each first cylinder, the push rod is arranged along the second direction, and each push rod is arranged in a cavity.

8. The automatic cold heading machine according to claim 4, characterized in that: Along the first direction, the two sides of the shell are respectively the first side and the second side, and the workpiece moves along the direction from the first side to the second side of the shell; wherein the cavity on the first side of the shell is a material storage cavity, and the other cavities are installation cavities; The stamping mechanism and the clamping mechanism are sequentially distributed along the second direction; the stamping mechanism also includes a second motor, a second connecting rod and a slider; the first crankshaft is arranged along the first direction, the first crankshaft is rotatably arranged on the housing, the second motor is fixedly arranged on the housing, and the output shaft of the second motor is fixedly connected to the first crankshaft; The second connecting rod is arranged along the second direction, and one end of the second connecting rod is rotationally connected to the first crankshaft; one side of the slider is rotationally connected to the other end of the second connecting rod; there are multiple punches, and the punches are fixedly arranged on the slider. The multiple punches are distributed in sequence along the first direction, and the punches and the mounting cavities correspond one by one.

9. An automated cold heading machine according to claim 8, characterized in that: It also includes a feeding mechanism, and the feeding mechanism and the clamping mechanism are distributed in sequence along the direction from the first side to the second side of the shell; the feeding mechanism includes two third motors and two conveying wheels; the third motor is fixedly arranged on the shell, the two third motors are distributed in sequence along the first direction, and each conveying wheel is fixedly arranged on a third motor; the two conveying wheels are distributed in sequence along the first direction, the axis of the conveying wheel is arranged along the second direction, and the conveying wheel can rotate along its own axis; the rotation directions of the two conveying wheels are opposite, the workpiece is arranged along the second direction, and the workpiece passes between the two conveying wheels.

10. An automated cold heading machine according to claim 9, characterized in that: It also includes a cutting mechanism, which is located on the first side of the shell. The cutting mechanism includes an electric cylinder and a cutting knife. The electric cylinder is fixedly arranged on the shell. The cutting knife is fixedly connected to the extended end of the electric cylinder. The cutting knife is used to cut the workpiece transported by the feeding mechanism; and the cutting knife is located in the storage cavity.

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