CN115555467A

CN115555467A - Automatic feeding device for punching of engine connecting rod forge piece

Info

Publication number: CN115555467A
Application number: CN202211176177.8A
Authority: CN
Inventors: 李晓伦
Original assignee: Zhejiang Ruisheng Machinery Technology Co ltd
Current assignee: Zhejiang Ruisheng Machinery Technology Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-01-03

Abstract

The invention discloses an automatic feeding device for punching of an engine connecting rod forge piece, belonging to the field of engine manufacturing, comprising a vibration feeding mechanism and a conveying mechanism, wherein the conveying mechanism is used for conveying a forge piece blank from the feeding mechanism to a punching mechanism for punching; an indexing mechanism is arranged between the vibration feeding mechanism and the punching mechanism and used for indexing the forging blanks in different directions on the conveying mechanism to the same direction; the punching mechanism comprises a working head, and the working head is vertically and slidably mounted on the rack. The invention can automatically distinguish the directions of the big head and the small head of the forging blank, and automatically transposes and adjusts the direction of the forging blank when the forging blank opposite to the specified direction passes through, so that the directions of the forging blank are unified, manual operation is not needed, and the efficiency is improved.

Description

Automatic feeding device for punching of engine connecting rod forge piece

Technical Field

The invention relates to the technical field of engine manufacturing, in particular to an automatic feeding device for punching of an engine connecting rod forge piece.

Background

The engine connecting rod is connected with the piston and the crankshaft, and transmits acting force borne by the piston to the crankshaft, so that reciprocating motion of the piston is converted into rotary motion of the crankshaft. The engine connecting rod mainly comprises a small head, a rod body and a large head. The connecting rod of the engine needs to use a forged piece in the production process, the forged piece needs to use a punching machine to punch a large head and a small head in the use process, and the forged piece needs to be placed below the punching machine in advance by a feeding device before punching.

The conventional feeding mechanism is usually fed by a manual feeding mechanism or an automatic feeding machine, the manual feeding mechanism is complex in operation, troublesome in use and low in feeding and discharging efficiency, and the operation burden of a user is increased; the orientation of the big end and the lower end of the forging cannot be distinguished by feeding of a common automatic feeding machine, and the orientation of the forging is unified and extremely inconvenient by manually turning the material and arranging the orientation.

Disclosure of Invention

The invention aims to provide an automatic feeding device for punching of an engine connecting rod forge piece, which can automatically distinguish the directions of a big head and a small head of a forge piece blank, automatically index and adjust the direction of the forge piece blank when the forge piece blank opposite to the specified direction passes through, so that the directions of the forge piece blanks are unified, manual operation is not needed, and the efficiency is improved.

In order to achieve the purpose, the invention provides the following technical scheme: an automatic feeding device for punching of an engine connecting rod forge piece comprises a vibration feeding mechanism and a conveying mechanism, wherein the conveying mechanism is used for conveying a forge piece blank from the feeding mechanism to a punching mechanism for punching; an indexing mechanism is arranged between the vibration feeding mechanism and the punching mechanism and used for indexing the forging blanks in different directions on the conveying mechanism to the same direction; the punching mechanism comprises a working head, and the working head is vertically and slidably mounted on the rack.

As a further scheme of the invention, the indexing mechanism comprises a rotating disc which is rotatably installed on the rack, the rotating disc is hollow, a supporting disc surface is placed above the rotating disc, and the upper end surface of the supporting disc surface is flush with a working surface on the conveying mechanism for placing the forging blank; a rotating column is in key connection with the central axis of the rotating disc and is sleeved with the supporting disc surface; the upper end of the rotating column is fixedly provided with a supporting round block for jacking the middle part of the forging blank, and the lower end of the rotating column is fixedly provided with a supporting plate; the support round block is fixedly provided with a poke rod, the poke rod is arranged along the radial direction of the support round block, and the poke rod is used for poking the forging blank to rotate for transposition; a spiral through groove is formed in the circumferential side wall of the rotating disc, a driving column is installed in the spiral through groove in a sliding mode, and the driving column is installed in the rack in a vertical sliding mode; a driving block for supporting the supporting plate is fixedly arranged at one end of the driving column and is in sliding connection with the supporting plate; the other end of the driving column is connected with a driving unit, and the driving unit is used for driving the driving column to vertically slide in the rack; a limiting ring is sleeved on the periphery of the supporting disc surface, the limiting ring is vertically and slidably mounted in the rack, a limiting plate is fixedly mounted at the upper end of the limiting ring, and the limiting plate is used for limiting the movement of the forging blank along the direction perpendicular to the conveying direction; the lower extreme of spacing ring with drive post sliding connection, the drive post is used for supporting the spacing ring.

As a further scheme of the invention, a support rod is fixedly arranged on the rack, a sliding column is vertically and slidably arranged on the support rod, and a second spring is arranged between the sliding column and the support rod; the sliding column is arranged right above the rotating column; and a lower pressing block is fixedly arranged at the lower end of the sliding column.

As a further scheme of the invention, the driving unit comprises a first driving plate fixedly connected with the working head, and the first driving plate is vertically and slidably mounted on the rack; the lower end inclined plane of the first driving plate is connected with a second driving plate, and the second driving plate is horizontally and slidably mounted on the rack; a third driving plate is connected to an inclined surface of one end, far away from the first driving plate, of the second driving plate, and the third driving plate is vertically and slidably mounted on the rack; a first spring is arranged between the third driving plate and the rack; the third driving plate is fixedly connected with the driving column.

As a further scheme of the invention, the lower end face of the working head is respectively in threaded connection with a large punching head and a small punching head, the upper ends of the large punching head and the small punching head are respectively in key connection with a first gear and a second gear, the first gear and the second gear are both meshed with a first rack, and the first rack is horizontally and slidably mounted on the working head.

As a further scheme of the invention, a friction strip is fixedly mounted at the upper end of the sliding column, the friction strip is vertically arranged, a friction wheel in friction contact with the friction strip is arranged beside the friction strip, the friction wheel is fixedly mounted on a first rotating shaft, the first rotating shaft is fixedly mounted on a rack, a ratchet wheel is further fixedly mounted on the first rotating shaft, a torsion spring is arranged between the ratchet wheel and the rack, a second rack part is further arranged on the first rack, and the ratchet wheel is meshed with the second rack part; a pawl is horizontally and slidably mounted on the rack, and a third spring is arranged between the pawl and the rack; the pawl is fixedly provided with a driving ring, a driving wedge surface is further arranged below the driving ring, the driving wedge surface is vertically and slidably arranged on the rack, the first rack is further fixedly provided with a jacking block, and the jacking block is used for jacking the driving inclined surface; the working head is further provided with an air cylinder connected with the first rack, and the air cylinder is used for driving the first rack to move and reset when the working head moves upwards.

As a further scheme of the invention, a groove is formed in the supporting disc surface and used for placing the poke rod.

As a further scheme of the invention, the edge of the groove is an inclined plane, and the circumferential edge of the poke rod is an inclined plane.

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

1. the invention can automatically distinguish the directions of the big head and the small head of the forging blank, and automatically adjust the direction of the forging blank in a transposition way when the forging blank opposite to the specified direction passes through, so that the directions of the forging blanks are unified, manual operation is not needed, and the efficiency is improved. The middle part of the forging blank is jacked up by the support round block driven by the upward movement of the driving column, so that the forging blank is inclined, and the forging blanks in different directions are inclined in different directions; the rotating disc is also driven to rotate to drive the poke rod to rotate for a half circle, and the forging blanks inclined in different directions are classified and adjusted; for the forging blank with the same direction as the specified direction, the poke rod does not drive the forging blank to rotate; and for the forging blank facing the direction opposite to the specified direction, the poke rod drives the forging blank to rotate for a half circle, so that the forging blank is adjusted to be consistent with the specified direction.

2. The invention provides power for the indexing mechanism by utilizing the pressing action of the punching mechanism, and the indexing adjustment and the matching of the forging blank in front of the punching mechanism are tight, thereby saving the time and improving the efficiency.

3. The invention utilizes the action of the supporting round block to jack up the forging blank, measures the thickness of the forging blank to be punched, automatically adjusts the heights of the large punching head and the small punching head on the working head in real time, and can avoid the damage of the forging blank caused by collision due to the too close distance between the large punching head and the forging blank and the small punching head; and the phenomenon that the large punching head and the small punching head are too far away from the forging blank can be avoided, so that the stroke of the working head is prolonged, the working time is prolonged, and the efficiency is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the general structure of the automatic feeding device of the present invention;

FIG. 2 is a schematic view of the automatic feeding device of the present invention in a half-section configuration;

FIG. 3 is an enlarged partial view of portion A of FIG. 2 according to the present invention;

FIG. 4 is an enlarged partial view of portion B of FIG. 2 according to the present invention;

FIG. 5 is a schematic view of the indexing mechanism and the driving unit of the present invention;

fig. 6 is a schematic structural diagram of an indexing mechanism according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

11-vibration feeding mechanism, 12-conveying mechanism, 13-forging blank, 14-punching mechanism, 15-working head, 21-rotating disc, 22-supporting disc surface, 23-rotating column, 24-supporting round block, 25-supporting plate, 26-poking rod, 27-spiral through groove, 28-driving column, 29-driving block, 30-spacing ring, 31-limiting plate, 41-supporting rod, 42-second spring, 43-lower pressing block, 44-sliding column, 51-first driving plate, 52-second driving plate, 53-third driving plate, 54-first spring, 61-large punching head, 62-small punching head, 63-first gear, 64-second gear, 65-first rack, 70-cylinder, 71-friction bar, 72-friction wheel, 73-first rotating shaft, 74-ratchet wheel, 75-second rack portion, 76-pawl, 77-third spring, 78-driving ring, 79-jacking block, 80-pushing block, 81-groove and 82-driving inclined plane.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the invention provides an automatic feeding device for punching of an engine connecting rod forging, which comprises a vibration feeding mechanism 11 and a conveying mechanism 12, wherein the conveying mechanism 12 is used for conveying a forging blank 13 from the feeding mechanism to a punching mechanism 14 for punching; an indexing mechanism is arranged between the vibration feeding mechanism 11 and the punching mechanism 14, and is used for indexing the forging blanks 13 in different directions on the conveying mechanism 12 to the same direction; the punching mechanism 14 comprises a working head 15, and the working head 15 is vertically and slidably mounted on the rack.

When the engine connecting rod forge piece is produced, an automatic feeding mechanism is needed to convey the forge piece blanks 13 to the lower part of the punching mechanism 14 one by one for punching. The existing automatic feeding mechanism can realize sequential feeding, but the forging blank 13 is rod-shaped, wherein the large head and the small head easily face differently when feeding, and the orientation needs to be manually adjusted by a worker, and the forging blank is punched after facing uniformly. As shown in figure 1, when the forging blank conveying device works, forging blanks 13 are fed in a vibration mode through the vibration feeding mechanism 11 and are conveyed one by one in sequence. When the blank is conveyed to the indexing mechanism, the indexing mechanism automatically distinguishes the orientation of the forging blank 13 above, and when the orientations of the large head and the small head on the forging blank 13 are consistent with the specified direction, the indexing mechanism does not adjust the orientation of the forging blank 13; when the orientation of the large head and the small head on the forging blank 13 is opposite to the specified direction, the indexing mechanism rotates the forging blank 13 to adjust the forging blank to be consistent with the specified direction, and manual operation is not needed. The conveying mechanism 12 then conveys the unified blank 13 to the lower side of the punching mechanism 14 for punching. When the punching mechanism 14 of the present invention punches a hole, the working head 15 is pressed down by external power to punch a hole.

As a further scheme of the invention, the indexing mechanism comprises a rotating disc 21 rotatably mounted on the rack, the rotating disc 21 is hollow, a supporting disc surface 22 is placed above the rotating disc 21, and the upper end surface of the supporting disc surface 22 is flush with the working surface of the conveying mechanism 12 for placing the forged blank 13; a rotating column 23 is mounted at the central axis of the rotating disc 21 in a key connection manner, and the rotating column 23 is sleeved with the support disc surface 22; the upper end of the rotating column 23 is fixedly provided with a supporting round block 24 for jacking the middle part of the forging blank 13, and the lower end of the rotating column 23 is fixedly provided with a supporting plate 25; a poke rod 26 is fixedly installed on the supporting round block 24, the poke rod 26 is arranged along the radial direction of the supporting round block 24, and the poke rod 26 is used for poking the forging blank 13 to rotate for transposition; a spiral through groove 27 is formed in the circumferential side wall of the rotating disc 21, a driving column 28 is slidably mounted in the spiral through groove 27, and the driving column 28 is vertically slidably mounted in the rack; a driving block 29 for supporting the supporting plate 25 is fixedly mounted at one end of the driving column 28, and the driving block 29 is slidably connected with the supporting plate 25; the other end of the driving column 28 is connected with a driving unit, and the driving unit is used for driving the driving column 28 to vertically slide in the rack; a limiting ring 30 is sleeved on the periphery of the support disc surface 22, the limiting ring 30 is vertically and slidably mounted in the rack, a limiting plate 31 is fixedly mounted at the upper end of the limiting ring 30, and the limiting plate 31 is used for limiting the movement of the forging blank 13 along the direction perpendicular to the conveying direction; the lower end of the limiting ring 30 is connected with the driving column 28 in a sliding manner, and the driving column 28 is used for supporting the limiting ring 30.

As shown in fig. 2, 5 and 6, in the invention, when in operation, the forging blank 13 firstly moves to the indexing mechanism, and the forging blank 13 is positioned on the support disc surface 22. The driving column 28 is moved vertically upward by the driving unit. Since the driving post 28 is slidably mounted in the spiral through groove 27, when the driving post 28 moves upward, the driving post 28 slides in the spiral through groove 27 and drives the rotary disk 21 to rotate. As shown in FIG. 6, since the driving column 28 moves upward, the driving block 29 fixed at one end thereof moves upward, and the supporting plate 25 is lifted up and the supporting plate 25 is driven to move upward. The support plate 25 is fixedly arranged at the lower end of the rotating column 23, and the rotating column 23 is connected with the rotating disc 21 in a key mode, so that the rotating disc 21 is static in the vertical direction, and the rotating column 23 moves upwards. Because the upper end of the rotating column 23 is fixedly provided with the supporting round block 24, the supporting round block 24 moves upwards to jack up the middle part of the forging blank 13. At this time, the middle part of the forging blank 13 is jacked up, and because the two ends of the large head and the small head of the forging blank 13 have different masses, the forging blank 13 can incline towards one end of the heavy large head. It should be noted that, in order to prevent the blank 13 from sliding when it is tilted, a stop ring 30 is provided on the outer periphery of the support disc surface 22. When the driving column 28 moves upwards, the driving column 28 simultaneously jacks up the limit ring 30 to move upwards, so that the forging blank 13 is positioned in the limit of the limit ring 30 when inclined, and sliding is avoided. As described above, the driving column 28 moves upward and drives the rotating disc 21 to rotate, the rotating disc 21 rotates and drives the rotating column 23 connected with the rotating disc to rotate, the rotating column 23 drives the supporting round block 24 to rotate, and the supporting round block 24 drives the poke rod 26 to rotate. As shown in fig. 6, in the present embodiment, the tap lever 26 is a hammer type for convenience of illustration, and the tap lever 26 may be a round lever. If the orientation of the forging blank 13 is opposite to the specified direction, as shown in fig. 6, when the forging blank 13 is jacked up by the supporting round block 24, one end of the heavy big end of the forging blank 13 inclines, at this time, the poke rod 26 is close to one end of the big end of the forging blank 13, the poke rod 26 pokes the big end of the forging blank 13 when rotating, the forging blank 13 is driven to rotate for a half turn in the limit ring 30, and the orientation of the forging blank 13 is adjusted to be consistent with the specified direction. The specific rotating process is that the poke rod 26 drives the big end of the forging blank 13 to rotate, and the limiting plates 31 on the two sides continuously limit the forging blank 13 during rotation. The forging blank 13 rotates to drive the limiting plate 31 to rotate through the small head of the forging blank 13, and the limiting plate 31 is fixedly installed on the limiting ring 30, so that the limiting ring 30 rotates for a half circle together. If the orientation of the forging blank 13 is consistent with the specified direction, when the forging blank 13 is jacked up by the supporting round block 24, one end of the heavier large end of the forging blank 13 inclines, one end of the small end is tilted, at the moment, the poke rod 26 is close to one end of the small end of the forging blank 13, the poke rod 26 is not in contact with the forging blank 13 when rotating, and therefore the poke rod 26 idles, and the forging blank 13 does not rotate. When the forging blank is reset, the driving column 28 is reset under the driving of the driving unit, the rotating disc 21 rotates, the rotating column 23 rotates, the poke rod 26 rotates, the supporting round block 24 moves downwards to reset, and the forging blank 13 is newly carved to be horizontally fallen on the supporting disc surface 22. The driving column 28 is moved upwards to drive the supporting round block 24 to jack up the middle part of the forging blank 13, so that the forging blank 13 is inclined, and the forging blanks 13 in different directions are inclined in different directions; the rotating disc 21 is also driven to rotate, the poke rod 26 is driven to rotate for a half circle, and the forging blanks 13 inclined in different directions are classified and adjusted; for the forging blank 13 with the same direction, the poke rod 26 does not drive the forging blank 13 to rotate; for the forging blank 13 facing the opposite direction, the poke rod 26 drives the forging blank 13 to rotate for half a turn, so that the forging blank is adjusted to be consistent with the specified direction.

As a further scheme of the present invention, a support rod 41 is fixedly installed on the rack, a sliding column 44 is vertically installed on the support rod 41 in a sliding manner, and a second spring 42 is arranged between the sliding column 44 and the support rod 41; the sliding column 44 is arranged right above the rotating column 23; the lower end of the sliding column 44 is fixedly provided with a lower pressing block 43.

As shown in fig. 5, the support rod 41 is fixedly mounted on the frame. When the blank 13 is jacked up by the supporting round block 24, the middle part of the blank 13 will contact with the upper lower pressing block 43, and drive the lower pressing block 43 to move upwards, drive the sliding column 44 to move upwards, and compress the second spring 42. At this time, the lower pressing block 43 and the supporting round block 24 clamp the middle part of the forging blank 13 together, so as to further ensure that the pivot of the forging blank 13 is always maintained in the middle part, and the forging blank 13 always rotates around the middle part of the forging blank 13 when being shifted by the shifting rod 26.

As a further scheme of the invention, the driving unit comprises a first driving plate 51 fixedly connected with the working head 15, and the first driving plate 51 is vertically and slidably mounted on the rack; a second driving plate 52 is connected to the lower inclined surface of the first driving plate 51, and the second driving plate 52 is horizontally and slidably mounted on the rack; a third driving plate 53 is connected to an inclined surface of one end, far away from the first driving plate 51, of the second driving plate 52, and the third driving plate 53 is vertically and slidably mounted on the rack; a first spring 54 is arranged between the third driving plate 53 and the frame; the third driving plate 53 is fixedly connected to the driving column 28.

When the invention works, the working head 15 on the punching mechanism 14 vertically moves downwards under the external power to punch. As shown in FIG. 5, the working head 15 moves vertically downward, which drives the first driving plate 51 to move vertically downward, the first driving plate 51 drives the second driving plate 52 to move horizontally rightward through the inclined surface, the second driving plate 52 drives the third driving plate 53 to move vertically upward through the inclined surface, and the first spring 54 is compressed. And the third driving plate 53 is fixedly provided with a driving column 28, and the driving column 28 moves upwards to perform indexing adjustment on the forging blank 13 before the punching mechanism 14. After punching, the working head 15 moves upward to drive the first driving plate 51 to return, the restoring force of the first spring 54 drives the driving post 28 to return, and the second driving plate 52 and the third driving plate 53 also return. The invention provides power for the indexing mechanism by utilizing the pressing action of the punching mechanism 14, and the indexing adjustment and the matching of the forging blank 13 before the punching mechanism 14 are tight, thereby saving time and improving efficiency.

As a further scheme of the present invention, the lower end surface of the working head 15 is respectively in threaded connection with a large punch head 61 and a small punch head 62, the upper ends of the large punch head 61 and the small punch head 62 are respectively in keyed connection with a first gear 63 and a second gear 64, the first gear 63 and the second gear 64 are both engaged with a first rack 65, and the first rack 65 is horizontally and slidably mounted on the working head 15.

As shown in fig. 4, the purpose of the arrangement is that when the forging piece blank 13 with different thicknesses is faced, the first rack 65 is directly driven to move to drive the first gear 63 and the second gear 64 to rotate, and then the large punching head 61 and the small punching head 62 are driven to rotate, so that the large punching head 61 and the small punching head 62 can vertically and finely adjust the heights of the large punching head 61 and the small punching head 62 on the working head 15, and the large punching head 61 and the small punching head 62 are prevented from being too close to the forging piece blank 13 and colliding to damage the forging piece blank 13; the phenomenon that the large stamping head 61 and the small stamping head 62 are too close to the forging blank 13 and collide to damage the forging blank 13 is avoided; and the phenomenon that the large stamping head 61 and the small stamping head 62 are too far away from the forging blank 13 can be avoided, so that the stroke of the working head 15 is prolonged, the working time is prolonged, and the efficiency is reduced.

As a further aspect of the present invention, a friction bar 71 is fixedly mounted at the upper end of the sliding column 44, the friction bar 71 is vertically arranged, a friction wheel 72 in frictional contact with the friction bar 71 is arranged beside the friction bar 71, the friction wheel 72 is fixedly mounted on a first rotating shaft 73, the first rotating shaft 73 is fixedly mounted on a rack, a ratchet wheel 74 is further fixedly mounted on the first rotating shaft 73, a torsion spring 80 is arranged between the ratchet wheel 74 and the rack, a second rack 75 is further arranged on the first rack 65, and the ratchet wheel 74 is meshed with the second rack 75; a pawl 76 is horizontally and slidably arranged on the rack, and a third spring 77 is arranged between the pawl 76 and the rack; a driving ring 78 is fixedly installed on the pawl 76, a driving wedge surface is further arranged below the driving ring 78, the driving wedge surface is vertically and slidably installed on the rack, a jacking block 79 is further fixedly installed on the first rack 65, and the jacking block 79 is used for jacking a driving inclined surface 82; the working head 15 is further provided with an air cylinder 70 connected with the first rack 65, and the air cylinder 70 is used for driving the first rack 65 to move and reset when the working head 15 moves upwards.

As shown in fig. 3 and 5, when the working head 15 is pushed down, the first rack gear 65 attached to the working head 15 moves down together with the working head 15, and the second rack gear portion 75 on the first rack gear 65 comes out of contact with the ratchet 74. At this time, as described above, the working head 15 moves downward to drive the driving column 28 to move upward, the driving column 28 moves upward to drive the supporting round block 24 to jack up the blank 13, the middle part of the blank 13 is jacked and extruded, the lower pressing block 43 moves upward, and the lower pressing block 43 moves upward to drive the sliding column 44 to move upward. The sliding column 44 moves upwards to drive the friction strip 71 fixedly mounted above the sliding column to move vertically upwards, and the friction strip 71 firstly moves upwards to contact with the friction wheel 72 and then continues to move upwards to drive the friction wheel 72 in frictional contact with the friction strip to rotate. The rotation of the friction wheel 72 rotates the rotary column 23, and the rotation of the first rotary shaft 73 rotates the ratchet wheel 74, while the pawl 76 does not restrict the rotation in this direction. Rotation of ratchet 74 the rotation of ratchet 74 drives torsion spring 80 to twist. When the working head 15 moves upwards and returns, the second spring 42 drives the sliding column 44 to move downwards and return, but because the pawl 76 limits the ratchet wheel 74 to not rotate, the first rotating shaft 73 to not rotate, and the friction wheel 72 to not rotate, the friction strip 71 and the friction wheel 72 slide relatively at this time, and the friction strip 71 is completely separated from the friction wheel 72. While the working head 15 moves upward and returns, the air cylinder 70 on the working head 15 drives the first rack 65 to move rightward and return, so that the large punch head 61 and the small punch head 62 return to the initial state. When the working head 15 finishes moving up and returning, the first rack 65 finishes moving up, and the second rack portion 75 on the first rack 65 contacts with the ratchet 74. As shown in fig. 3, at this time, the jacking block 79 on the first rack 65 contacts with the driving inclined surface 82 on the frame, the driving inclined surface 82 is jacked up, the driving inclined surface 82 contacts with the wedge inclined surface of the driving ring 78, the driving ring 78 is driven by the driving inclined surface 82 to move rightwards, the pawl 76 moves rightwards to lose the limit of the ratchet 74, the torsion spring 80 resets to drive the first rotating shaft 73 to rotate, the first rotating shaft 73 rotates to drive the ratchet 74 to rotate, the ratchet 74 rotates to drive the first rack 65 to move horizontally through the second rack 75, and the height of the large punch head 61 and the small punch head 62 on the working head 15 is finely adjusted. When the thickness of the forged blank 13 at the indexing mechanism is increased, because the moving height of the driving column 28 is unchanged, the distance of the sliding column 44 moving upwards is increased due to the increased thickness of the forged blank 13, so that the distance of the friction strip 71 moving upwards is increased, the rotation angle of the friction wheel 72 is increased, the power of the torsion spring 80 is increased, and thus, during recovery, the rotation angle of the ratchet wheel 74 is increased due to the torsion spring 80, the distance of the ratchet wheel 74 driving the first rack 65 to move is increased, and the height of the large punch head 61 and the small punch head 62 on the working head 15 is increased. According to the invention, the action of jacking the forging blank 13 by using the supporting round block 24 is utilized, the thickness of the forging blank 13 to be punched is measured at the same time, the heights of the large punching head 61 and the small punching head 62 on the working head 15 are automatically adjusted in real time, and the damage to the forging blank 13 caused by collision due to too close distance between the large punching head 61 and the small punching head 62 and the forging blank 13 can be avoided; and the large punching head 61 and the small punching head 62 can be prevented from being too far away from the forging blank 13, so that the stroke of the working head 15 is prolonged, the working time is prolonged, and the efficiency is reduced.

As a further scheme of the invention, a groove 81 is formed in the support disc surface 22, and the groove 81 is used for placing the poke rod 26. As shown in fig. 6, the purpose of this arrangement is to flatten the support plate surface 22 so that the blank 13 can enter and leave the indexing mechanism horizontally.

As a further aspect of the present invention, the groove edge of the groove 81 is a slope, and the circumferential edge of the tap lever 26 is a slope. As shown in fig. 6, when the driving rod 28 moves upward, the tap lever 26 rotates while moving upward, and this arrangement is provided to facilitate the smooth sliding of the tap lever 26 out of the recess 81.

Claims

1. The utility model provides an engine connecting rod forging punches a hole and uses automatic feeding device which characterized in that: the forging blank punching machine comprises a vibration feeding mechanism (11) and a conveying mechanism (12), wherein the conveying mechanism (12) is used for conveying a forging blank (13) from the feeding mechanism to a punching mechanism (14) for punching; an indexing mechanism is arranged between the vibration feeding mechanism (11) and the punching mechanism (14), and is used for indexing the forging blanks (13) in different directions on the conveying mechanism (12) to the same direction; the punching mechanism (14) comprises a working head (15), and the working head (15) is vertically and slidably mounted on the rack.

2. The automatic feeding device for punching the engine connecting rod forge piece as claimed in claim 1, wherein: the indexing mechanism comprises a rotating disc (21) which is rotatably installed on the rack, the rotating disc (21) is hollow, a supporting disc surface (22) is placed above the rotating disc (21), and the upper end surface of the supporting disc surface (22) is flush with the working surface of the conveying mechanism (12) for placing the forging blank (13); a rotating column (23) is in key connection with the central axis of the rotating disc (21), and the rotating column (23) is sleeved with the support disc surface (22); a supporting round block (24) used for jacking the middle part of the forging blank (13) is fixedly mounted at the upper end of the rotating column (23), and a supporting plate (25) is fixedly mounted at the lower end of the rotating column (23); a poke rod (26) is fixedly installed on the supporting round block (24), the poke rod (26) is arranged along the radial direction of the supporting round block (24), and the poke rod (26) is used for poking the forging blank (13) to rotate for transposition; a spiral through groove (27) is formed in the circumferential side wall of the rotating disc (21), a driving column (28) is installed in the spiral through groove (27) in a sliding mode, and the driving column (28) is installed in the rack in a vertical sliding mode; one end of the driving column (28) is fixedly provided with a driving block (29) for supporting the supporting plate (25), and the driving block (29) is connected with the supporting plate (25) in a sliding manner; the other end of the driving column (28) is connected with a driving unit, and the driving unit is used for driving the driving column (28) to vertically slide in the rack; a limiting ring (30) is sleeved on the periphery of the support disc surface (22), the limiting ring (30) is vertically and slidably mounted in the rack, a limiting plate (31) is fixedly mounted at the upper end of the limiting ring (30), and the limiting plate (31) is used for limiting the movement of the forging blank (13) along the direction perpendicular to the conveying direction; the lower extreme of spacing ring (30) with drive post (28) sliding connection, drive post (28) are used for supporting spacing ring (30).

3. The automatic feeding device for punching the engine connecting rod forge piece as claimed in claim 2, wherein: a support rod (41) is fixedly installed on the rack, a sliding column (44) is vertically installed on the support rod (41) in a sliding mode, and a second spring (42) is arranged between the sliding column (44) and the support rod (41); the sliding column (44) is arranged right above the rotating column (23); and a lower pressing block (43) is fixedly arranged at the lower end of the sliding column (44).

4. The automatic feeding device for punching the engine connecting rod forge piece as claimed in claim 2, wherein: the driving unit comprises a first driving plate (51) fixedly connected with the working head (15), and the first driving plate (51) is vertically and slidably mounted on the rack; a second driving plate (52) is connected to the lower end inclined surface of the first driving plate (51), and the second driving plate (52) is horizontally and slidably mounted on the rack; a third driving plate (53) is connected to an inclined surface of one end, far away from the first driving plate (51), of the second driving plate (52), and the third driving plate (53) is vertically and slidably mounted on the rack; a first spring (54) is arranged between the third driving plate (53) and the rack; the third driving plate (53) is fixedly connected with the driving column (28).

5. The automatic feeding device for punching the engine connecting rod forge piece as claimed in claim 3, wherein: the lower end face of the working head (15) is respectively in threaded connection with a large punching head (61) and a small punching head (62), the upper ends of the large punching head (61) and the small punching head (62) are respectively in key connection with a first gear (63) and a second gear (64), the first gear (63) and the second gear (64) are both meshed with a first rack (65), and the first rack (65) is horizontally and slidably mounted on the working head (15).

6. The automatic feeding device for punching the engine connecting rod forge piece as claimed in claim 5, wherein: a friction strip (71) is fixedly installed at the upper end of the sliding column (44), the friction strip (71) is vertically arranged, a friction wheel (72) in friction contact with the friction strip (71) is arranged beside the friction strip (71), the friction wheel (72) is fixedly installed on a first rotating shaft (73), the first rotating shaft (73) is fixedly installed on a rack, a ratchet wheel (74) is further fixedly installed on the first rotating shaft (73), a torsion spring (80) is arranged between the ratchet wheel (74) and the rack, a second rack part (75) is further arranged on the first rack (65), and the ratchet wheel (74) is meshed with the second rack part (75); a pawl (76) is horizontally installed on the rack in a sliding manner, and a third spring (77) is arranged between the pawl (76) and the rack; a driving ring (78) is fixedly mounted on the pawl (76), a driving wedge surface is further arranged below the driving ring (78), the driving wedge surface is vertically and slidably mounted on the rack, a jacking block (79) is further fixedly mounted on the first rack (65), and the jacking block (79) is used for jacking a driving inclined surface (82); the working head (15) is further provided with an air cylinder (70) connected with the first rack (65), and the air cylinder (70) is used for driving the first rack (65) to move and reset when the working head (15) moves upwards.

7. The automatic feeding device for punching the engine connecting rod forge piece as claimed in claim 6, wherein: a groove (81) is formed in the supporting disc surface (22), and the groove (81) is used for placing the poking rod (26).

8. The automatic feeding device for punching the engine connecting rod forge piece according to claim 7, wherein the automatic feeding device comprises: the groove edge of the groove (81) is an inclined plane, and the circumferential edge of the poke rod (26) is an inclined plane.