Multifunctional composite cold header

Abstract

The invention discloses a multifunctional composite cold header. Comprising a bottom cover, a machine body fixedly connected to the bottom cover, a driving motor arranged on one side of the machine body, a transmission main shaft, a transmission auxiliary shaft, an eccentric shaft eccentrically and fixedly connected between the transmission main shaft and the transmission auxiliary shaft and a reciprocating cutting assembly arranged on one side of the machine body and used for cutting bars, the intermittent feeding assembly is arranged on the front face of the machine body and used for conveying the bars, and the intermittent punching die assembly is used for longitudinally punching the cut bars. According to the cold header, semi-hollow screws can be produced under the condition that standard screws are produced, double functions and practicability are achieved through one machine type, capital investment of client equipment is greatly reduced, noise generated during production is greatly reduced through the structure of the cold header, stability is better and precision is higher during product discharging, and defective products are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cold heading machines, in particular to a multifunctional composite cold heading machine. Background Art

[0002] Cold heading machine is a kind of efficient metal forming equipment specially used for batch production of nuts, bolts and other fasteners. It applies pressure to the metal blank at room temperature through the cold heading process, causing it to undergo plastic deformation in the die, thereby obtaining the required shape and size. Modern cold heading machines have developed multi-station and multi-series models with the characteristics of high efficiency and automation, capable of achieving continuous production, and the processed products have high strength, good surface quality and high dimensional accuracy. It is widely used in the fields of automotive parts, construction materials, hardware parts, etc.

[0003] When a cold heading machine cold heads a bar, the cold heading time, i.e., the time the die extrude the bar, should be as long as possible to ensure that the size of the parts produced in the same batch is relatively uniform. For example, the front discharge device of a cold heading machine disclosed in the application document with announcement number CN 215697700U has a transmission device that is a common cold heading machine transmission device. The transmission device includes an input motor, a crankshaft, and a push rod rotatably connected to the crankshaft. The crankshaft rotates to drive the push rod to push the slide seat to move left and right, so that the die installed on the slide seat punches the cut bar, so that the bar is formed into the required shape. However, when the bar is cold headed by the transmission unit, the slide stays close to the bar for a short time, and the bar is extruded for a short time. The size of parts produced in the same batch, such as bolts or nuts, will have certain differences, and the quality of parts in the same batch is difficult to control.

[0004] The current cold heading machine is used to improve the problem of quality differences in the same batch of bar materials during the cold heading process. For example, a cold heading machine with application number CN202310642222.2 has the following technical points: a bed; a feeding unit installed on the bed for conveying bar materials; a cutting unit installed on the bed for cutting off the bar materials conveyed by the feeding unit to the bed; a main slide and a main mold box arranged relatively to each other, the main slide is slidably connected to the bed, and the main mold box is fixedly connected to the bed; a transmission unit includes: a main crankshaft, which is rotatably connected to the bed and is connected to the external motor transmission; a first connecting rod, one end of which is connected to the main The eccentric part of the crankshaft is rotatably connected; the first connecting shaft is fixedly connected to the bed; the second connecting rod is arranged above the first connecting rod, and one end of the second connecting rod is rotatably connected to the first connecting shaft; the second connecting shaft, the other end of the first connecting rod is rotatably connected to the second connecting shaft, and the other end of the second connecting rod is rotatably connected to the second connecting shaft; and a pushing connecting rod, one end of the pushing connecting rod is rotatably connected to the second connecting shaft, and the other end is rotatably connected to the main slide, the pushing connecting rod is used to push the main slide to slide relative to the bed, and the main slide is used to cold head the bar close to the main mold box; the clamping unit is installed on the bed, and is used to clamp the bar to different workstations.

[0005] This technical solution mainly uses a motor as a power source to complete the cold heading of the bar. However, in fact, this cold heading machine has high requirements for the motor as a power source, requiring the motor to be able to bear a large load, so as to ensure that a series of structures driven by the motor can drive the cutter to cut the bar. However, in actual application, under the strength resistance of the bar, if the force provided by the motor is insufficient, the bar may not be completely cut every time, and then a large number of defective semi-finished products will appear when they finally leave the cold heading machine.

[0006] Therefore, a multifunctional composite cold heading machine is proposed to solve or alleviate the above problems. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a multifunctional composite cold heading machine.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A multifunctional composite cold heading machine comprises a bottom cover, a machine body fixedly connected to the bottom cover, a driving motor arranged at one side of the machine body, a transmission main shaft and a transmission auxiliary shaft coaxially and rotatably connected to a frame, an eccentric shaft eccentrically fixedly connected between the transmission main shaft and the transmission auxiliary shaft, a reciprocating cutting assembly arranged at one side of the machine body and used for cutting bars, an intermittent feeding assembly arranged at the front of the machine body and used for transporting bars and an intermittent punching die assembly for longitudinally punching the cut bars, and a pushing assembly arranged in the machine body and used for pushing the dropped bars and a compression assembly for compressing air, wherein the output shaft of the driving motor is fixedly connected to the machine body, and ... A driving wheel is fixedly connected to the transmission main shaft, a transmission wheel is fixedly connected to the driving wheel, the driving wheel and the transmission wheel are connected by a transmission belt, a balancing wheel is fixedly connected to the transmission auxiliary shaft, the transmission main shaft is connected to the reciprocating cutting assembly by a first transmission assembly, the transmission main shaft is connected to the intermittent feeding assembly by a second transmission assembly, the intermittent feeding assembly is connected to the intermittent die assembly, the eccentric shaft is connected to the compression assembly, the compression assembly and the reciprocating cutting assembly, the compression assembly and the ejecting assembly are all connected by connecting pipelines, and the connecting pipelines can be turned on and off.

[0009] Preferably, the reciprocating cutting assembly includes a slide with a C-shaped cross-section and fixedly connected to one side of the machine body, a slide plate slidably connected to the slide, a side arm fixedly connected to one side of the slide through a guide rod, a cross bar fixedly connected to the top of the side arm and located above the machine body, a cutting knife fixedly connected to an end of the cross bar away from the side arm, a top shaft slidably connected to the outside of the guide rod and passing through the machine body to its interior, a fixedly connected to the end of the top shaft away from the guide rod and located at the knife seat, a movable through groove opened on the top surface of the slide and having the same length direction as the guide rod, a guide connecting block slidably connected in the movable through groove and on the outside of the guide rod, and a cylindrical guide column fixedly connected to the bottom surface of the guide connecting block, the top shaft passes through the slide and the top shaft is fixedly connected to the guide connecting block, a Z-shaped offset groove is opened on the top surface of the slide, the guide column is slidably connected in the offset groove, and the end of the slide away from the slide is fixedly connected with a limit cover that can be sleeved on the outside of the slide.

[0010] Preferably, the first transmission assembly includes a driving gear fixedly connected to the outside of the transmission main shaft, a first gear shaft that penetrates the body, a driven gear fixedly connected to the end of the first gear shaft and meshing with the driving gear, an upper slider eccentrically connected to the end face of the driven gear, a slide frame slidably connected to the outside of the upper slider, and a pressurizing cylinder fixedly connected to the slide frame, the movable end of the pressurizing cylinder is fixedly connected to a rotating rod, and the end of the rotating rod away from the pressurizing cylinder is rotatably connected to the slide plate.

[0011] Preferably, a mounting seat is fixedly connected to the front side of the body, and the intermittent feeding assembly includes a guide block rotatably arranged on the mounting seat, an arc-shaped arm, a main guide gear rotatably arranged on the mounting seat, a driving gear coaxially fixedly connected to the main guide gear, a swivel seat coaxial with the driving gear and rotating relative to the driving gear and in the shape of an elongated strip, a hook claw rotatably connected to one end of the swivel seat, and a slave guide gear rotatably connected to the mounting seat and meshing with the main guide gear, the guide block is provided with an elongated sliding groove, the lower end of the arc-shaped arm is fixedly connected to a smooth column slidably connected in the sliding groove, the upper end of the arc-shaped arm is rotatably connected to an end of the swivel seat away from the hook claw, the hook claw is meshingly arranged with the teeth of the driving gear, a movable wheel is arranged on the side of the mounting seat away from the main guide gear, the main guide gear is coaxially connected to the movable wheel for transmission, the slave guide gear is coaxially connected to a directional wheel located below the movable wheel, there is a channel for rods to pass through between the movable wheel and the directional wheel, and a wheel cover located above the movable wheel is fixedly connected to the side wall of the mounting seat.

[0012] Preferably, the front side of the machine body is fixedly connected with a connecting platform located on one side of the mounting seat, the intermittent die assembly includes a push rod which longitudinally penetrates the machine body to its interior, a striker which longitudinally penetrates the connecting platform and is coaxially arranged with the push rod, a connecting shaft rotatably connected between the connecting platform and the mounting seat, a swing arm rotatably connected to the outside of the connecting shaft, and a connecting spring which is fixedly connected to the lower end of the swing arm and the front side of the machine body and a cam which is intermittently coaxially connected to the guide block, a top seat for the push rod to pass through is provided in the machine body, a receiving groove between the connecting spring and the connecting shaft is provided on the swing arm, a receiving wheel is rotatably connected in the receiving groove, the outer ring of the receiving wheel can be arranged to abut against the outer ring of the cam, a vertical groove is provided on the bottom surface of the connecting platform, a groove is provided on the bottom surface of the striker, and the upper end of the swing arm extends into the groove.

[0013] Preferably, the lifting assembly includes an inclined and hollow shaft frame, a lower slider slidably connected to the shaft frame, an elastic cylinder fixedly connected to the lower end of the shaft frame, a connecting rod fixedly connected to the movable end of the elastic cylinder and the lower slider, and a transmission rocker arm rotatably connected to the lower slider through a rotating shaft. The upper end of the shaft frame is fixedly connected to one side of the machine body, and the side of the frame away from the shaft frame is fixedly connected to two longitudinally arranged return springs, the ends of the two groups of return springs are commonly fixedly connected to a connecting seat, the connecting seat and the swing arm are rotatably connected to an articulated arm, a transverse axis is fixedly connected between the two articulated arms, a fixed seat is fixedly connected to the machine body, two longitudinally arranged push plates are slidably connected in the fixed seat, and the two articulated arms are rotatably connected to the two push plates respectively.

[0014] Preferably, the compression assembly includes an eccentric rocker arm rotatably connected to the outside of the eccentric shaft, a piston rotatably connected to one end of the eccentric rocker arm away from the eccentric shaft, a main connecting tube, an auxiliary connecting tube connected to the main connecting tube, an exhaust pipe connected to the main connecting tube, a pressure sensor fixedly connected to the top surface of the body, and a vertical rod. The body is provided with a longitudinally arranged horizontal cylinder body, a vertical cylinder body connected to the horizontal cylinder body, and a supporting cylinder body located below the pressure sensor. A one-way valve connected to the horizontal cylinder body is fixedly connected to the body. The vertical rod is slidably connected in the supporting cylinder body, and the upper end of the vertical rod is arranged to abut against the probe of the pressure sensor. The auxiliary connecting pipe is connected to the lower end of the straight cylinder body, the main connecting tube is connected to the lower end of the vertical cylinder body, and the exhaust pipe is connected to the reciprocating cutting assembly and the top material assembly through a connecting pipeline.

[0015] Preferably, the connecting pipeline includes a transverse air valve arranged on the back of the machine body, and a first side air valve and a second side air valve arranged on both sides of the machine body, the air outlet pipe is connected to the transverse air valve through a first connecting air pipe, and the transverse air valve is connected to the first side air valve and the second side air valve through a plurality of second connecting air pipes, respectively, a plurality of lower air holes connected to the interior of the bottom cover are provided on the side wall of the bottom cover, an upper air hole connected to the interior of the bottom cover is provided on the side wall of the machine body, an air seat located above the top material assembly is fixedly connected to the machine body, and a gas seat is provided with a gas outlet facing the machine body. An air injection slot is arranged on the front side of the body, the first side air valve is connected with the air seat through the third connecting air pipe running through the upper air hole, the first side air valve is connected with the plurality of lower air holes through a plurality of fourth connecting air pipes, the second side air valve is connected with the elastic cylinder through the fifth connecting air pipe, the second side air valve is connected with the pressurized air cylinder through the sixth connecting air pipe, the lateral air valve, the first side air valve, and the second side air valve are all electrically controlled valves, the pressure sensor is coupled with a controller, and the controller is coupled with the lateral air valve, the first side air valve, and the second side air valve.

[0016] Preferably, the second transmission assembly includes a first bevel gear fixedly connected to the first gear shaft away from one end of the driven gear, a second bevel gear meshing with the first bevel gear, a third bevel gear coaxially fixedly connected to the second bevel gear through the second gear shaft, a fourth bevel gear meshing with the third bevel gear, a third gear shaft passing through the connecting platform, and a fourth gear shaft passing through the mounting seat and coaxially connected to the third gear shaft. A rotating seat is fixedly connected to one side of the body, the second gear shaft is rotatably connected in the rotating seat, the cam is fixedly connected to the third gear shaft, and the ends of the third gear shaft and the fourth gear shaft facing each other are coaxially fixedly connected with the first end face teeth and the second end face teeth, respectively, the first end face teeth and the second end face teeth can be meshingly connected, and the fourth gear shaft is fixedly connected to the guide block.

[0017] Preferably, an inclined guide plate is fixedly connected inside the bottom cover, and open grooves are provided on the front and back sides of the bottom cover. An inclined receiving hopper is fixedly connected to the bottom cover at the front opening groove, and chip removal grooves are provided in the thickness direction of the guide plate and the thickness direction of the receiving hopper.

[0018] The present invention has the following beneficial effects: In the present invention, the transmission main shaft and the transmission auxiliary shaft drive the eccentric shaft to rotate, the eccentric rocker arm makes the piston reciprocate in the cylinder body, the air enters the cylinder body through the one-way valve and is compressed, the vertical rod is lifted up in the supporting cylinder body and presses against the pressure sensor, when the pressure reaches the standard, the controller opens the air valve to exhaust. In this way, the cold heading machine can produce qualified semi-finished bars, avoiding incomplete cutting, and the cold heading machine can produce semi-hollow screws while producing standard screws. One model realizes dual functions and is practical, greatly reducing the customer's equipment capital investment, and the structure of this machine greatly reduces the noise during production, and improves the stability and precision of product discharge, greatly reducing the production of defective products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 The structure diagram of the present invention after removing the base frame and the outer cover is shown in FIG. Figure 1 ; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 The structure diagram of the present invention after removing the base frame and the outer cover is shown in FIG. Figure 2 ; Figure 5 for Figure 4 The enlarged view of point B in the middle; Figure 6 The structure diagram of the present invention after removing the base frame and the outer cover is shown in FIG. Figure 3 ; Figure 7 for Figure 6 Enlarged view of point C in the middle; Figure 8 The structure diagram of the present invention after removing the base frame and the outer cover is shown in FIG. Figure 4 ; Fig. 9 The structure diagram of the present invention after removing the base frame and the outer cover is shown in FIG. Figure 5 ; Fig.10 for Fig. 9 The enlarged view of point D in the middle; Fig.11 The structure diagram of the present invention after removing the base frame and the outer cover is shown in FIG. Figure 6 ; Fig.12 This is a cross-sectional view of the present invention after the base frame and the outer cover are removed; Fig.13 for Fig.12 Enlarged view of point E in the middle; Fig.14 for Fig.12 The enlarged view of F in the middle; Fig.15 It is a schematic diagram of the structure of the reciprocating cutting assembly in the present invention.

[0021] 1. chassis; 2. cover; 3. bottom cover; 4. horizontal seat; 5. vertical guide roller; 6. vertical seat; 7. horizontal guide roller; 8. connecting platform; 9. machine body; 10. mounting seat; 11. wheel cover; 12. movable wheel; 13. directional wheel; 14. driving motor; 15. transmission belt; 16. transmission wheel; 17. transmission main shaft; 18. driving gear; 19. eccentric shaft; 20. transmission auxiliary shaft; 21. balance wheel; 22. driven gear; 23. upper slide block; 24. slide frame; 25. pressurized cylinder; 2 6. Rotating rod; 27. Slide plate; 28. Dislocation groove; 29. ​​Sliding seat; 30. Guide rod; 31. Side arm; 32. Cross bar; 33. Cutter; 34. Guide connecting block; 35. Guide column; 36. Top shaft; 37. Knife seat; 38. Limit cover; 39. Shaft frame; 40. Elastic cylinder; 41. Connecting rod; 42. Lower slide block; 43. Rotating shaft; 44. Transmission rocker; 45. Cross shaft; 46. Articulated arm; 47. Fixed seat; 48. Push plate; 49. Return spring; 50. Connecting seat; 51. a gear shaft; 52, first bevel gear; 53, second bevel gear; 54, second gear shaft; 55, third bevel gear; 56, fourth bevel gear; 57, third gear shaft; 58, cam; 59, first end face gear; 60, second end face gear; 61, striker; 62, swing arm; 63, connecting shaft; 64, receiving groove; 65, receiving wheel; 66, connecting spring; 67, ejector rod; 68, ejector seat; 69, fourth gear shaft; 70, guide block; 71, arc arm; 72, hook; 73, belt driving gear; 74, main guide gear; 75, slave guide gear; 76, eccentric rocker arm; 77, piston; 78, horizontal cylinder body; 79, vertical cylinder body; 80, support cylinder body; 81, vertical rod; 82, pressure sensor; 83, main connecting tube; 84, auxiliary connecting tube; 85, air outlet pipe; 86, air seat; 87, jet groove; 88, upper air hole; 89, first side air valve; 90, lower air hole; 91, second side air valve; 92, horizontal air valve; 93, guide plate; 94, collecting hopper; 95, chip removal groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the invention is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] A multifunctional composite cold heading machine, such as Figure 1-Figure 15As shown, it includes a base frame 1, a bottom cover 3 fixedly connected to the base frame 1, a body 9 fixedly connected to the bottom cover 3, an outer cover 2 fixedly connected to the base frame 1 and sleeved on the outside of the body 9, a driving motor 14 arranged on one side of the body 9, a transmission main shaft 17 and a transmission auxiliary shaft 20 coaxially and rotatably connected to the frame, an eccentric shaft 19 eccentrically fixedly connected between the transmission main shaft 17 and the transmission auxiliary shaft 20, a reciprocating cutting assembly arranged on one side of the body 9 and used for cutting rods, an intermittent feeding assembly arranged on the front of the body 9 and used for transporting rods and an intermittent die assembly for longitudinally punching the cut rods, and a ejecting assembly arranged in the body 9 and used for pushing the dropped rods. Parts and a compression assembly for compressed air, the output shaft of the driving motor 14 is fixedly connected with a driving wheel, the transmission main shaft 17 is fixedly connected with a transmission wheel 16, the driving wheel and the transmission wheel 16 are transmission-connected by a transmission belt 15, the transmission auxiliary shaft 20 is fixedly connected with a balance wheel 21, the transmission main shaft 17 is transmission-connected with the reciprocating cutting assembly through a first transmission assembly, the transmission main shaft 17 is transmission-connected with the intermittent feeding assembly through a second transmission assembly, the intermittent feeding assembly is transmission-connected with the intermittent die assembly, the eccentric shaft 19 is transmission-connected with the compression assembly, the compression assembly and the reciprocating cutting assembly, the compression assembly and the ejecting assembly are all connected through connecting pipelines, and the connecting pipelines can be set to be on and off.

[0029] like Figure 8 , Fig.10 , Fig.15 As shown, the reciprocating cutting assembly includes a slide 29 with a C-shaped cross section and fixedly connected to one side of the machine body 9, a slide plate 27 slidably connected to the slide 29, a side arm 31 fixedly connected to one side of the slide 29 through a guide rod 30, a cross bar 32 fixedly connected to the top of the side arm 31 and located above the machine body 9, a cutter 33 fixedly connected to the end of the cross bar 32 away from the side arm 31, a top shaft 36 slidably connected to the outside of the guide rod 30 and penetrating the machine body 9 to the inside thereof, a top shaft 36 fixedly connected to the end of the top shaft 36 away from the guide rod 30 and located at the knife seat 37, and a cutter 33 opened on the slide. A movable through groove is provided on the top surface of the seat 29 and has the same length direction as the guide rod 30, a guide connecting block 34 is slidably connected in the movable through groove and on the outside of the guide rod 30, and a guide column 35 is fixedly connected to the bottom surface of the guide connecting block 34 and is cylindrical. A top shaft 36 passes through the sliding seat 29 and is fixedly connected to the guide connecting block 34. A Z-shaped offset groove 28 is provided on the top surface of the slide plate 27. The guide column 35 is slidably connected in the offset groove 28. The end of the slide plate 29 away from the slide plate 27 is fixedly connected with a limit cover 38 that can be sleeved on the outside of the slide plate 27.

[0030] The first transmission assembly includes a driving gear 18 fixedly connected to the outside of the transmission main shaft 17, a first gear shaft 51 that penetrates the body 9, a driven gear 22 fixedly connected to the end of the first gear shaft 51 and meshingly connected to the driving gear 18, an upper slider 23 eccentrically connected to the end surface of the driven gear 22, a slide frame 24 slidably connected to the outside of the upper slider 23, and a pressurizing cylinder 25 fixedly connected to the slide frame 24, a rotating rod 26 is fixedly connected to the movable end of the pressurizing cylinder 25, and an end of the rotating rod 26 away from the pressurizing cylinder 25 is rotatably connected to the slide plate 27.

[0031] like Figure 3 , Figure 7 and Fig.13 As shown, the front of the machine body 9 is fixedly connected with a mounting seat 10, and the intermittent feeding assembly includes a guide block 70 rotatably arranged on the mounting seat 10, an arc-shaped arm 71, a main guide gear 74 rotatably arranged on the mounting seat 10, a driving gear 73 coaxially fixedly connected to the main guide gear 74, a rotating seat coaxial with the driving gear 73 and rotating relative to the driving gear 73 and in a long strip shape, a hook claw 72 rotatably connected to one end of the rotating seat, and a slave guide gear 75 rotatably connected to the mounting seat 10 and meshingly connected to the main guide gear 74, a long strip sliding groove is provided on the guide block 70, and the arc-shaped arm 71 is provided with a plurality of guide wheels. The lower end is fixedly connected to a smooth column slidably connected in the sliding groove, the upper end of the arc arm 71 is rotatably connected to the end of the swivel seat away from the hook claw 72, the hook claw 72 is meshed with the teeth of the driving gear 73, and a movable wheel 12 is provided on the side of the mounting seat 10 away from the main guide gear 74. The main guide gear 74 is coaxially connected to the movable wheel 12, and a directional wheel 13 located below the movable wheel 12 is coaxially connected to the guide gear 75. There is a channel between the movable wheel 12 and the directional wheel 13 for the passage of rods, and a wheel cover 11 located above the movable wheel 12 is fixedly connected to the side wall of the mounting seat 10.

[0032] like Figure 5 and Fig.13 As shown, the front of the machine body 9 is fixedly connected with a connecting platform 8 located on one side of the mounting seat 10, the intermittent die assembly includes a push rod 67 which longitudinally penetrates the machine body 9 to the inside thereof, a striker 61 which longitudinally penetrates the connecting platform 8 and is coaxially arranged with the push rod 67, a connecting shaft 63 which is rotatably connected between the connecting platform 8 and the mounting seat 10, a swing arm 62 which is rotatably connected to the outside of the connecting shaft 63, and a connecting spring 66 which is fixedly connected to the lower end of the swing arm 62 and the front of the machine body 9 and a cam 58 which is intermittently coaxially connected to the guide block 70. A top seat 68 for the push rod 67 to penetrate is provided in the machine body 9, a receiving groove 64 which is located between the connecting spring 66 and the connecting shaft 63 is provided on the swing arm 62, a receiving wheel 65 is rotatably connected in the receiving groove 64, and the outer ring of the receiving wheel 65 can be arranged to abut against the outer ring of the cam 58, a vertical groove is provided on the bottom surface of the connecting platform 8, a groove is provided on the bottom surface of the striker 61, and the upper end of the swing arm 62 extends into the groove.

[0033] like Figure 2 , Figure 6 , Figure 7 As shown, the ejection assembly includes an inclined and hollow shaft frame 39, a lower slider 42 slidably connected in the shaft frame 39, an elastic cylinder 40 fixedly connected in the lower end of the shaft frame 39, a connecting rod 41 fixedly connecting the movable end of the elastic cylinder 40 and the lower slider 42, and a transmission rocker arm 44 rotatably connected to the lower slider 42 through a rotating shaft 43. The upper end of the shaft frame 39 is fixedly connected to one side of the machine body 9, and the side of the machine frame away from the shaft frame 39 is fixedly connected with two longitudinally arranged return springs 49, and the ends of the two groups of return springs 49 are commonly fixedly connected to a connecting seat 50, and the connecting seat 50 and the swing arm 62 are both rotatably connected to an articulated arm 46, and a transverse axis 45 is fixedly connected between the two articulated arms 46. A fixed seat 47 is fixedly connected in the machine body 9, and two longitudinally arranged push plates 48 are slidably connected in the fixed seat 47, and the two articulated arms 46 are rotatably connected to the two push plates 48 respectively.

[0034] like Fig.11 , Fig.12 , Fig.14 As shown, the compression assembly includes an eccentric rocker arm 76 rotatably connected to the outside of the eccentric shaft 19, a piston 77 rotatably connected to the end of the eccentric rocker arm 76 away from the eccentric shaft 19, a main connecting tube 83, an auxiliary connecting tube 84 connected to the main connecting tube 83, an exhaust pipe 85 connected to the main connecting tube 83, a pressure sensor 82 fixedly connected to the top surface of the body 9, and a vertical rod 81. The body 9 is provided with a longitudinally arranged horizontal cylinder body 78, a vertical cylinder body 79 connected to the horizontal cylinder body 78, and a supporting cylinder body 80 located below the pressure sensor 82. A one-way valve connected to the horizontal cylinder body 78 is fixedly connected to the body 9. The vertical rod 81 is slidably connected in the supporting cylinder body 80, and the upper end of the vertical rod 81 is set to abut against the probe of the pressure sensor 82. The auxiliary connecting tube 84 is connected to the lower end of the straight cylinder body, the main connecting tube 83 is connected to the lower end of the vertical cylinder body 79, and the exhaust pipe 85 is connected to the reciprocating cutting assembly and the top material assembly through a connecting pipeline.

[0035] like Figure 2 , Figure 4 , Figure 7-Figure 11As shown, the connecting pipeline includes a transverse air valve 92 arranged on the back of the body 9, and a first side air valve 89 and a second side air valve 91 arranged on both sides of the body 9. The outlet pipe 85 is connected to the transverse air valve 92 through the first connecting air pipe, and the transverse air valve 92 is connected to the first side air valve 89 and the second side air valve 91 through a plurality of second connecting air pipes, respectively. A plurality of lower air holes 90 connected to the interior of the bottom cover 3 are provided on the side wall, and an upper air hole 88 connected to the interior of the body 9 is provided on the side wall. An air seat 86 located above the top material assembly is fixedly connected to the body 9, and a gas seat 86 is provided with a gas seat facing the front of the body 9. The first side air valve 89 is connected to the air seat 86 through a third connecting air pipe running through the upper air hole 88, the first side air valve 89 is connected to a plurality of lower air holes 90 through a plurality of fourth connecting air pipes, the second side air valve 91 is connected to the elastic cylinder 40 through a fifth connecting air pipe, the second side air valve 91 is connected to the pressurized air cylinder 25 through a sixth connecting air pipe, the lateral air valve 92, the first side air valve 89, and the second side air valve 91 are all electrically controlled valves, the pressure sensor 82 is coupled to a controller, and the controller is coupled to the lateral air valve 92, the first side air valve 89, and the second side air valve 91.

[0036] like Figure 2 , Figure 4 , Figure 6 , Figure 8 , Fig. 9 , Fig.11 and Fig.13 As shown, the second transmission assembly includes a first bevel gear 52 fixedly connected to a first gear shaft 51 away from one end of the driven gear 22, a second bevel gear 53 meshingly connected to the first bevel gear 52, a third bevel gear 55 coaxially fixedly connected to the second bevel gear 53 through a second gear shaft 54, a fourth bevel gear 56 meshingly connected to the third bevel gear 55, a third gear shaft 57 passing through the connecting platform 8, and a fourth gear shaft 69 passing through the mounting seat 10 and coaxially connected to the third gear shaft 57. A rotating seat is fixedly connected to one side of the body 9, and the second gear shaft 54 ​​is rotatably connected in the rotating seat. The cam 58 is fixedly connected to the third gear shaft 57, and the ends of the third gear shaft 57 and the fourth gear shaft 69 facing each other are coaxially fixedly connected with the first end face tooth 59 and the second end face tooth 60 respectively. The tooth cross-section of the first end face tooth 59 and the second end face tooth 60 is a right triangle, and the first end face tooth 59 and the second end face tooth 60 can be meshingly connected. The fourth gear shaft 69 is fixedly connected to the guide block 70, and a torsion spring is sleeved on the outer side of the fourth gear shaft 69, one end of the torsion spring is fixedly connected to the body 9, and the other end of the torsion spring is fixedly connected to the guide block 70, so that the guide block 70 can rotate.

[0037] An inclined guide plate 93 is fixedly connected inside the bottom cover 3, and open grooves are provided on the front and back sides of the bottom cover 3. An inclined receiving hopper 94 is fixedly connected to the bottom cover 3 located at the front opening groove, and chip removal grooves 95 are provided in the thickness direction of the guide plate 93 and the thickness direction of the receiving hopper 94. A vertical seat 6 is fixedly connected to the side of the mounting seat 10 away from the machine body 9, and a plurality of transverse guide rollers 7 are rotatably connected to the side of the vertical seat 6. A transverse seat 4 is fixedly connected to the side of the vertical seat 6 away from the mounting seat 10, and a plurality of vertical guide rollers 5 are rotatably connected to the transverse seat 4.

[0038] When the present invention is actually working, the operator straightens the bar through the guidance of the vertical guide roller and the horizontal guide roller 7, and then enters between the movable wheel 12 and the directional wheel 13. In this process, the driving motor 14 is used as a power source to drive the driving wheel and the transmission belt 15 on its output shaft to drive the transmission wheel 16 to rotate. When the transmission wheel 16 rotates, the driving gear 18 and the transmission main shaft 17 are driven to rotate. The transmission main shaft 17 drives the eccentric wheel and the transmission auxiliary shaft 20 to rotate. When the transmission auxiliary shaft 20 rotates, it drives the balance wheel 21 to rotate. In this way, the transmission main shaft 17 and the transmission auxiliary shaft 20 on both sides of the frame can maintain a relatively balanced state, so that the transmission wheel 16 is not easy to shake when it rotates; When the driving gear 18 rotates, it will also drive the driven gear 22 to rotate. The driven gear 22 will drive the first gear shaft 51 to drive the first bevel gear 52 to rotate. The first bevel gear 52 will then drive the second bevel gear 53 meshing therewith to rotate. Then the second bevel gear 53 is driven by the second gear shaft 54, so that the third bevel gear 55 drives the fourth bevel gear 56 to rotate. When the fourth bevel gear 56 rotates, it will drive the third gear shaft 57 to rotate. The third gear shaft 57 drives the fourth gear shaft 69 to rotate intermittently through the first end face teeth 59 and the second end face teeth 60. When the fourth gear shaft 69 rotates, it will drive the guide block 70 to rotate, thereby allowing the arc arm 71 to drive the rotating seat to rotate clockwise. When the rotating seat rotates clockwise, it will drive the hook 72 to push the driving gear 73 to deflect by a certain angle. In this way, the main guide gear 74 will also deflect by the same angle, and the slave guide gear 75 meshing therewith will rotate counterclockwise, so that the movable wheel 12 and the directional wheel 13 on the mounting frame can drive the bar to intermittently move. Then the bar enters the machine body 9. Under the rotation of the driven gear 22, the upper slider 23 eccentrically rotating thereon will also rotate, and will also slide in the slide frame 24, thereby forming a crank connecting rod 41 structure, thereby enabling the pressurized cylinder 25 and the rotating rod 26 to push the slide plate 27 to slide in the slide seat 29. At the same time, due to the shape of the offset groove 28 on the slide plate 27, the guide column 35 can drive the guide connecting block 34 to move back and forth, and the guide connecting block 34 can be guided by the guide rod 30 during the displacement process, and has good stability. In this way, the cutter 33 will not be displaced, but the knife seat 37 moves together with the top shaft 36 and the guide connecting block 34, so that the knife seat 37 and the cutter 33 cooperate to complete the cutting of the bar. At this time, the bar will be pushed forward by the knife seat 37, so that the cut bar is displaced with the subsequent bar to be processed. At this time, the cut bar is located on the end face of the top seat 68; At the same time, due to the rotation of the third gear shaft 57, the cam 58 can squeeze the receiving wheel 65 on the swing arm 62, so that the swing arm 62 can swing once through the connecting shaft 63, and then the upper end of the swing arm 62 can drive the striker 61, so that the striker 61 hits the top rod 67, so that the top rod 67 penetrates the body 9 and the top seat 68, squeezes the cut rod, and can be inserted into the rod, so that its shape is corrected and becomes the original shape of the semi-hollow screw; During the whole process, the transmission main shaft 17 and the transmission auxiliary shaft 20 will drive the eccentric shaft 19 to rotate, and the eccentric shaft 19 will drive the piston 77 to move back and forth in the horizontal cylinder body 78 through the eccentric rocker arm 76. The air enters the horizontal cylinder body 78, the vertical cylinder body 79, and the supporting cylinder body 80 through the one-way valve. As the piston 77 continues to operate, the air therein is compressed, so that the vertical rod 81 is pushed upward in the supporting cylinder body 80 and presses against the pressure sensor 82, so that the pressure sensor 82 detects that the pressure becomes larger. When the pressure reaches a certain value, the controller can control the horizontal air valve 92, the first side air valve 89, and the second side air valve 91 to be partially or fully opened to exhaust air so that the compressed air can be used. Among them, the compressed air enters the pressurized cylinder 25, and the pressurized cylinder 25 can instantly increase the force applied by the reciprocating cutting assembly to the rod. The rod can be cut cleanly, thereby ensuring the quality of the semi-finished product. In addition, the compressed air can also enter the elastic cylinder 40 so that the elastic cylinder 40 pushes the lower slider 42 to move in the shaft frame 39, so that the rotating shaft 43 on the lower slider 42 drives the transmission rocker arm 44 to deflect, and then the transmission rocker arm 44 can pull the hinge arm 46 to deflect, so that the push plate 48 rotatably connected to the hinge arm 46 can be displaced in the fixed seat 47, so that the push plate 48 can push the falling rod forward, so that the rod can fall into the receiving hopper 94 for recycling. In addition, the pressurized air can also be sprayed through the jet slot 87 on the air seat 86, and can also be sprayed through the lower air hole 90, so that the debris can be separated from the rod through the chip removal slot 95, and the rod cutting part is kept as clean as possible to avoid the situation of debris jamming; As a result, the cold heading machine can produce semi-finished bars with qualified quality without incomplete cutting.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multifunctional compound cold heading machine, characterized in that: The invention comprises a bottom cover (3), a machine body (9) fixedly connected to the bottom cover (3), a driving motor (14) arranged on one side of the machine body (9), a transmission main shaft (17) and a transmission auxiliary shaft (20) coaxially and rotatably connected to a frame, an eccentric shaft (19) eccentrically fixedly connected between the transmission main shaft (17) and the transmission auxiliary shaft (20), a reciprocating cutting assembly arranged on one side of the machine body (9) and used for cutting rods, an intermittent feeding assembly arranged on the front side of the machine body (9) and used for transporting rods and an intermittent punching die assembly for longitudinally punching the cut rods, a pushing assembly arranged in the machine body (9) and used for pushing the dropped rods and a compression assembly for compressing air, wherein the output shaft of the driving motor (14) A driving wheel is fixedly connected, a driving wheel (16) is fixedly connected to the driving main shaft (17), the driving wheel and the driving wheel (16) are connected to each other via a driving belt (15), a balancing wheel (21) is fixedly connected to the driving auxiliary shaft (20), the driving main shaft (17) is connected to the reciprocating cutting assembly via a first driving assembly, the driving main shaft (17) is connected to the intermittent feeding assembly via a second driving assembly, the intermittent feeding assembly is connected to the intermittent punching die assembly, the eccentric shaft (19) is connected to the compression assembly, the compression assembly is connected to the reciprocating cutting assembly, and the compression assembly is connected to the ejecting assembly via a connecting pipeline, and the connecting pipeline can be opened and closed.

2. A multifunctional compound cold heading machine according to claim 1, characterized in that: The reciprocating cutting assembly comprises a slide seat (29) having a C-shaped cross section and fixedly connected to one side of the machine body (9), a slide plate (27) slidably connected to the slide seat (29), a side arm (31) fixedly connected to one side of the slide seat (29) via a guide rod (30), a cross bar (32) fixedly connected to the top of the side arm (31) and located above the machine body (9), a cutting knife (33) fixedly connected to an end of the cross bar (32) away from the side arm (31), a top shaft (36) slidably connected to the outside of the guide rod (30) and penetrating the machine body (9) to the inside thereof, a top shaft (36) fixedly connected to an end of the top shaft (36) away from the guide rod (30) and located at a knife seat (37), and a cutting knife (33) provided on the slide seat (29). 9) a movable through groove on the top surface and having the same length direction as the guide rod (30), a guide connecting block (34) slidably connected in the movable through groove and on the outside of the guide rod (30), and a cylindrical guide column (35) fixedly connected to the bottom surface of the guide connecting block (34), the top shaft (36) passing through the slide seat (29) and the top shaft (36) and the guide connecting block (34) are fixedly connected, the top surface of the slide plate (27) is provided with a Z-shaped offset groove (28), the guide column (35) is slidably connected in the offset groove (28), and the end of the slide seat (29) away from the slide plate (27) is fixedly connected with a limit cover (38) that can be sleeved on the outside of the slide plate (27).

3. A multifunctional compound cold heading machine according to claim 2, characterized in that: The first transmission assembly comprises a driving gear (18) fixedly connected to the outside of a transmission main shaft (17), a first gear shaft (51) penetrating the machine body (9), a driven gear (22) fixedly connected to the end of the first gear shaft (51) and meshingly connected to the driving gear (18), an upper slider (23) eccentrically rotatably connected to the end surface of the driven gear (22), a slide frame (24) slidably connected to the outside of the upper slider (23), and a pressurizing cylinder (25) fixedly connected to the slide frame (24), wherein a rotating rod (26) is fixedly connected to the movable end of the pressurizing cylinder (25), and an end of the rotating rod (26) away from the pressurizing cylinder (25) is rotatably connected to the slide plate (27).

4. The multifunctional composite cold heading machine according to claim 3, characterized in that: The front side of the machine body (9) is fixedly connected to a mounting seat (10), and the intermittent feeding assembly comprises a guide block (70) rotatably arranged on the mounting seat (10), an arc-shaped arm (71), a main guide gear (74) rotatably arranged on the mounting seat (10), a driving gear (73) coaxially fixedly connected to the main guide gear (74), a rotating seat coaxial with the driving gear (73) and rotatable relative to the driving gear (73) and in the shape of an elongated strip, a hook (72) rotatably connected to one end of the rotating seat, and a slave guide gear (75) rotatably connected to the mounting seat (10) and meshingly connected to the main guide gear (74), the guide block (70) is provided with an elongated sliding groove, and the lower end of the arc-shaped arm (71) is fixedly connected to the main guide gear (74). A smooth column is connected to the sliding groove, the upper end of the arc arm (71) is rotatably connected to the end of the rotating seat away from the hook claw (72), the hook claw (72) is meshed with the teeth of the driving gear (73), a movable wheel (12) is arranged on the side of the mounting seat (10) away from the main guide gear (74), the main guide gear (74) is coaxially connected to the movable wheel (12), the slave guide gear (75) is coaxially connected to the directional wheel (13) located below the movable wheel (12), a channel for rods to pass through is provided between the movable wheel (12) and the directional wheel (13), and a wheel cover (11) located above the movable wheel (12) is fixedly connected to the side wall of the mounting seat (10).

5. The multifunctional composite cold heading machine according to claim 4, characterized in that: The front side of the machine body (9) is fixedly connected to a connecting platform (8) located on one side of the mounting seat (10), and the intermittent die assembly comprises a push rod (67) longitudinally penetrating the machine body (9) to the inside thereof, a striker (61) longitudinally penetrating the connecting platform (8) and coaxially arranged with the push rod (67), a connecting shaft (63) rotatably connected between the connecting platform (8) and the mounting seat (10), a swing arm (62) rotatably connected to the outside of the connecting shaft (63), and a connecting spring (66) and a guide block (70) fixedly connecting the lower end of the swing arm (62) and the front side of the machine body (9). A cam (58) connected by intermittent coaxial transmission, a top seat (68) for a top rod (67) to penetrate is arranged in the body (9), a receiving groove (64) located between a connecting spring (66) and a connecting shaft (63) is provided on the swing arm (62), a receiving wheel (65) is rotatably connected in the receiving groove (64), an outer ring of the receiving wheel (65) can be arranged to abut against the outer ring of the cam (58), a vertical groove is provided on the bottom surface of the connecting platform (8), a groove is provided on the bottom surface of the striker (61), and the upper end of the swing arm (62) extends into the groove.

6. The multifunctional compound cold heading machine according to claim 5, characterized in that: The ejector assembly comprises an inclined and hollow shaft frame (39), a lower slider (42) slidably connected to the shaft frame (39), an elastic cylinder (40) fixedly connected to the lower end of the shaft frame (39), a connecting rod (41) fixedly connecting the movable end of the elastic cylinder (40) and the lower slider (42), and a transmission rocker arm (44) rotatably connected to the lower slider (42) via a rotating shaft (43), wherein the upper end of the shaft frame (39) is fixedly connected to one side of the machine body (9), and a longitudinally movable shaft (44) is fixedly connected to the side of the machine frame away from the shaft frame (39). Two return springs (49) are arranged in a direction, and the ends of the two groups of return springs (49) are fixedly connected to a connecting seat (50) together. The connecting seat (50) and the swing arm (62) are both rotatably connected to an articulated arm (46). A transverse axis (45) is fixedly connected between the two articulated arms (46). A fixed seat (47) is fixedly connected inside the machine body (9). Two longitudinally arranged push plates (48) are slidably connected inside the fixed seat (47). The two articulated arms (46) are rotatably connected to the two push plates (48) respectively.

7. A multifunctional compound cold heading machine according to claim 6, characterized in that: The compression assembly comprises an eccentric rocker arm (76) rotatably connected to the outside of the eccentric shaft (19), a piston (77) rotatably connected to one end of the eccentric rocker arm (76) away from the eccentric shaft (19), a main connecting tube (83), an auxiliary connecting tube (84) connected to the main connecting tube (83), an air outlet pipe (85) connected to the main connecting tube (83), a pressure sensor (82) fixedly connected to the top surface of the body (9), and a vertical rod (81). The body (9) is provided with a longitudinally arranged horizontal cylinder body (78), a vertical cylinder body connected to the horizontal cylinder body (78), and a vertical cylinder body (81). The machine body (9) is provided with a one-way valve connected to the horizontal cylinder body (78), the vertical rod (81) is slidably connected in the supporting cylinder body (80), and the upper end of the vertical rod (81) is arranged to abut against the probe of the pressure sensor (82), the auxiliary connecting pipe (84) is connected to the lower end of the straight cylinder body, the main connecting tube (83) is connected to the lower end of the vertical cylinder body (79), and the air outlet pipe (85) is connected to the reciprocating cutting assembly and the ejecting assembly through a connecting pipeline.

8. The multifunctional compound cold heading machine according to claim 7, characterized in that: The connecting pipeline comprises a transverse air valve (92) arranged on the back of the machine body (9), and a first side air valve (89) and a second side air valve (91) arranged on both sides of the machine body (9); the air outlet pipe (85) is connected to the transverse air valve (92) through the first connecting air pipe; the transverse air valve (92) is respectively connected to the first side air valve (89) and the second side air valve (91) through a plurality of second connecting air pipes; a plurality of lower air holes (90) connected to the interior of the bottom cover (3) are formed on the side wall of the bottom cover (3); an upper air hole (88) connected to the interior of the bottom cover (3) is formed on the side wall of the machine body (9); an air seat (86) located above the ejection assembly is fixedly connected to the inside of the machine body (9); the air seat (86) is provided with a gas outlet facing the front of the machine body (9); An air injection groove (87) is provided, the first side air valve (89) is connected to the air seat (86) through a third connecting air pipe penetrating the upper air hole (88), the first side air valve (89) is connected to the plurality of lower air holes (90) through a plurality of fourth connecting air pipes, the second side air valve (91) is connected to the elastic air cylinder (40) through a fifth connecting air pipe, the second side air valve (91) is connected to the pressurizing air cylinder (25) through a sixth connecting air pipe, the lateral air valve (92), the first side air valve (89), and the second side air valve (91) are all electrically controlled valves, the pressure sensor (82) is coupled to a controller, and the controller is coupled to the lateral air valve (92), the first side air valve (89), and the second side air valve (91).

9. The multifunctional composite cold heading machine according to claim 6, characterized in that: The second transmission assembly comprises a first bevel gear (52) fixedly connected to a first gear shaft (51) at one end away from the driven gear (22), a second bevel gear (53) meshingly connected to the first bevel gear (52), a third bevel gear (55) coaxially fixedly connected to the second bevel gear (53) via a second gear shaft (54), a fourth bevel gear (56) meshingly connected to the third bevel gear (55), a third gear shaft (57) passing through the connecting platform (8), and a third gear shaft (57) passing through the mounting seat (10) and coaxially connected to the third gear shaft (57). A fourth gear shaft (69), one side of the machine body (9) is fixedly connected to a rotating seat, the second gear shaft (54) is rotatably connected in the rotating seat, the cam (58) is fixedly connected to the third gear shaft (57), and the ends of the third gear shaft (57) and the fourth gear shaft (69) facing each other are coaxially fixedly connected with a first end face tooth (59) and a second end face tooth (60), the first end face tooth (59) and the second end face tooth (60) are arranged to be meshed and connected, and the fourth gear shaft (69) is fixedly connected to a guide block (70).

10. The multifunctional compound cold heading machine according to claim 1, characterized in that: A guide plate (93) arranged obliquely is fixedly connected inside the bottom cover (3), and an opening groove is provided on the front and back sides of the bottom cover (3). A receiving hopper (94) arranged obliquely is fixedly connected to the bottom cover (3) at the front opening groove, and a chip removal groove (95) is provided in the thickness direction of the guide plate (93) and the thickness direction of the receiving hopper (94).

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