CN111842612B - Automatic cracking equipment for crank connecting rod - Google Patents
Automatic cracking equipment for crank connecting rod Download PDFInfo
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- CN111842612B CN111842612B CN202010669763.0A CN202010669763A CN111842612B CN 111842612 B CN111842612 B CN 111842612B CN 202010669763 A CN202010669763 A CN 202010669763A CN 111842612 B CN111842612 B CN 111842612B
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- cracking
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- workbench
- seat
- connecting rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/002—Drive of the tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
Abstract
The invention relates to the technical field of crank arm connecting rods, in particular to automatic cracking equipment for a crank connecting rod, which comprises a workbench, a cracking die, a top pressing plate, a cracking wedge, an ejector rod and a cam mechanism, wherein the workbench is also provided with a through hole; the working table is arranged on the cam mechanism, a plurality of groups of cracking molds are uniformly and circumferentially fixed on the working table, the through holes are formed in the bottoms of the cracking molds, the top pressing plate is arranged above the working table, the bottoms of the top pressing plates are tightly attached to the tops of the cracking molds, the ejector rods are movably inserted into the through holes, the cracking wedges are fixed on the tops of the ejector rods, and the cam mechanism is grounded; the automatic cracking device has the advantages that the automatic cracking of the crank connecting rod is realized, the structure is simple, expensive precise instruments are not needed, the cracking effect is controllable, the material loss is reduced, the confusion of materials is avoided, and the automatic sorting is realized.
Description
Technical Field
The invention relates to the technical field of crank arm connecting rods, in particular to automatic cracking equipment for a crank connecting rod.
Background
At present, the connecting rod cracking process is a technology for cracking and separating a connecting rod cover from a connecting rod body by applying a material cracking theory. By adopting the process, a plurality of procedures (milling, grinding, broaching and the like of a connecting rod-free joint surface) in the traditional connecting rod processing can be omitted, so that the connecting rod processing becomes simpler.
Compared with the traditional connecting rod processing method, the adoption of the connecting rod cracking process can save 25% of machine tool investment, 35% of cutter cost, 40% of energy and the like. Therefore, the processing cost of the connecting rod is greatly reduced.
The principle of the cracking process is that a V-shaped groove is prefabricated on the splitting surface of a big-end hole of a connecting rod, and then a cracking force is applied to the groove. Because stress concentration is generated at the groove, the connecting rod body and the connecting rod cover are separated. This technique has high requirements on the material of the connecting rod and the dimensional accuracy of the groove. In the cracking process, if the material performance of the connecting rod and the size precision of the groove cannot meet the requirements, the single side of the connecting rod is easily torn, the section is seriously inclined, the slag is seriously fallen and the like.
At present, the types and models of engines produced by enterprises are diversified, the specifications and models of engine connecting rods are changed, one connecting rod cracking device used by the enterprises cannot meet the cracking processing requirements of various connecting rods, and the processing cost is high.
The invention CN201010532759.6 discloses a connecting rod cracking device and a using method, comprising a foundation plate, a fixed plate fixed on the foundation plate, a sliding plate arranged in a sliding rail on the foundation plate, a cracking seat used for positioning and cracking the big end of the connecting rod, a cracking wedge pressed into the cracking seat during cracking, and a movable adjusting positioning plate, wherein the positioning plate is fixedly arranged on a guide groove of the sliding plate through a fixing bolt, a positioning pin is fixedly arranged on the positioning plate, a small gasket is arranged between the positioning pin and the inner side of the small end of the connecting rod, and a separated big gasket is arranged between the cracking seat and the inner side of the big end of the connecting rod. The cracking wedge is pressurized by the hydraulic oil cylinder, and the cracking seat converts downward pressure into tension in the horizontal direction of the cracking seat, so that cracking is achieved, and the cracking processing of connecting rods with different specifications is met.
However, the materials after the expanding-breaking are often mixed up, and due to the one-to-one matching property of the expanding-breaking method, the workload of correct pairing of workers is increased, so that the automatic expanding-breaking and automatic sorting can be completed by the aid of the equipment, efficiency is further improved, and labor cost is reduced.
Disclosure of Invention
The invention aims to provide automatic cracking equipment for a crank connecting rod, which realizes automatic cracking of the crank connecting rod, has a simple structure, does not need expensive precise instruments, has a controllable cracking effect, reduces material loss, avoids material confusion and realizes automatic sorting.
In order to achieve the purpose, the invention adopts the following technical scheme:
the automatic cracking equipment for the crank connecting rod comprises a workbench, a cracking die, a top pressing plate, a cracking wedge, an ejector rod and a cam mechanism, wherein the workbench is also provided with a through hole;
the workstation sets up on cam mechanism, and the even circumference of a plurality of groups schizolysis mould is fixed on the workstation, and the through-hole setting is in schizolysis mould bottom, and the top clamp plate setting is in the workstation top, and schizolysis mould top is hugged closely to top clamp plate bottom, and the mobilizable grafting of ejector pin is in the through-hole, and the schizolysis wedge is fixed at the ejector pin top, and cam mechanism ground connection.
As a preferred scheme of the automatic cracking equipment of the crank connecting rod, the cracking mould comprises a supporting plate, a fixed groove, the front part of a cracking seat, a sliding groove and a sliding block;
the supporting plate is fixed above the workbench, the fixing groove is a groove which is arranged on the supporting plate and is matched with the connecting rod in shape, a gap is left at one end far away from the axis direction of the workbench, the front part of the cracking seat is a semi-cylinder fixed on the fixing groove, the circle center of the semi-cylinder and the circle center of the big end of the connecting rod which is arranged in the cracking mould are positioned at the same position, the diameter of the semi-cylinder is smaller than or equal to the inner diameter of the big end of the connecting rod, the sliding groove is arranged on the inner wall of the two sides of one end of the fixed groove which is far away from the axle center of the working platform, the sliding block is arranged in the sliding groove in a sliding way, the rear part of the cracking device is fixedly arranged on the sliding block, the rear part of the cracking device is a semi-cylinder which can be combined with the front part of the cracking seat into a complete cylinder, the bottom of the front part and the rear part of the cracking seat is provided with a wedge-shaped groove, the front part and the rear part of the cracking seat are attached to form a complete cylinder in a non-working state, and the front part and the rear part of the cracking seat are separated in a working state.
As a preferred scheme of the automatic cracking equipment of the crank connecting rod, the cam mechanism comprises a rotary driving mechanism and a lifting platform, wherein the lifting platform further comprises a guide groove, a lifting interval and a descending interval;
the rotary driving mechanism is arranged below the workbench, the top of the rotary driving mechanism is fixedly connected with the workbench, the axes of the rotary driving mechanism and the workbench are collinear, the lifting table is fixed on the periphery of the rotary driving mechanism and is an annular table top, the guide groove is formed in the lifting table, the bottom cambered surface of the ejector rod is abutted to the guide groove, the ascending section is a section which smoothly ascends on the guide groove, and the descending section is a section which smoothly descends in smooth connection with the ascending section.
As a preferred scheme of the automatic cracking equipment of the crank connecting rod, the automatic cracking equipment further comprises a resetting mechanism, wherein the resetting mechanism comprises a push rod and an annular wall, and the annular wall comprises a first interval, a second interval and a transition interval;
reset mechanism sets up peripherally at the workstation, rear end fixed connection is done to push rod one end and schizolysis, the push rod level runs through the layer board perisporium, the directional annular wall of push rod other end, first interval, the interval of second is the different three-section arc wall of the inboard diameter of push rod with the transition interval, wherein the internal diameter between first interval is minimum, the internal diameter between the second is greater than between first interval, the interval head end of transition and first interval are connected, the interval end of transition is connected with the interval of second, the interval is the even transition section of internal diameter between first interval and the interval of second, the interval of second sets up and is done the rear portion in the schizolysis and keeps away from the anterior stage department of schizolysis seat in the rear portion.
The push rod is also provided with a pulley;
the pulley is arranged at one end of the push rod close to the annular wall.
As a preferred scheme of the automatic cracking equipment of the crank connecting rod, the resetting mechanism is also provided with a guide sleeve;
the guide pin bushing is fixed on the workstation, and guide pin bushing internal diameter size equals with the push rod external diameter.
As a preferred scheme of the automatic cracking equipment of the crank connecting rod, the automatic cracking equipment also comprises a carrying mechanism, wherein the carrying mechanism comprises a mechanical arm and a linear transmission mechanism;
the linear transmission mechanism is arranged on one side of the workbench, and the mechanical arm is arranged between the workbench and the linear transmission mechanism.
As an optimal scheme of the automatic cracking equipment of the crank connecting rod, an electromagnet is installed at the working end of the mechanical arm.
As a preferred scheme of the automatic cracking equipment of the crank connecting rod, the through hole is also provided with a guide groove, and the ejector rod is also provided with a guide strip;
the guide way sets up on the through-hole inner wall radial symmetry, and the gib block sets up at ejector pin outer wall both sides radial symmetry, and the guide way and gib block size phase-match.
As a preferred scheme of the automatic cracking equipment of the crank connecting rod, a V-shaped groove is formed in the inner wall of the large end of the crank connecting rod.
The invention has the beneficial effects that:
the working personnel place the connecting rod to be broken in the cracking mould of the working platform, the cam mechanism drives the working platform to rotate and simultaneously enables the ejector rod to slide upwards along the through hole, the cracking wedge moves upwards along with the ejector rod so as to force the cracking mould to extrude the inner wall of the large end of the connecting rod arranged in the cracking mould, the top pressure plate presses the connecting rod in the cracking mould so as to prevent the connecting rod from separating from the cracking mould, the large end of the connecting rod is broken in a stressed way, the sliding friction between one end of the push rod close to the annular wall and the inner wall of the annular wall is changed into rolling friction through the arrangement of the pulley, the loss caused by the friction is reduced, the operation effect of the equipment is further ensured, when the working platform drives the cracking mould to rotate to the position where the cracking mould starts to be broken, the annular wall just enters a second interval from the first interval, thus providing an outward extending space for the push rod, and then the rear part of the cracking pushes the push rod to extend to the inner wall of the second interval, when the cracking operation is completed, the push rod is rotated to a second interval, the inner wall of the second interval pushes the tail end of the push rod attached to the second interval to enable the push rod to retract towards the axis direction, when the push rod moves to the first interval, the rear part of the cracking rod is pushed by the push rod to reset and is attached to the front part of the cracking seat again, sliding friction between one end of the push rod close to the annular wall and the inner wall of the annular wall is changed into rolling friction through the pulley, loss caused by friction is reduced, the operation effect of the equipment is further ensured, the push rod is further limited through the guide sleeve, the push rod can only move close to and far away from the axis of the workbench in the horizontal direction, the resetting effect is ensured, the cracking connecting rods are transported away in pairs through the transporting mechanism, the problem that the materials are mixed and cannot be paired is avoided, and the mechanical arm transports the two parts of the cracking connecting rods to the linear transmission mechanism together, the linear transmission mechanism sends the materials to a worker, the electromagnet is arranged on a mechanical arm, the electromagnet is electrified to generate magnetic force, the mechanical arm enables the electromagnet to approach a cracking mold, the part which is subjected to cracking is absorbed onto the electromagnet, the mechanical arm conveys the electromagnet and the part to the position above the linear transmission mechanism, the electromagnet is powered off, the magnetism disappears, the part is slightly dropped on the linear transmission mechanism, the top rod can rotate when moving up and down in the through hole, the cracking wedge can rotate, and the cracking operation cannot be accurately completed, in order to prevent the situation, the through hole is additionally arranged on the inner wall of the through hole, the guide strip is additionally arranged on the outer wall of the top rod, the top rod only can do linear reciprocating motion and can not rotate when moving in the through hole, the cracking wedge can not deviate, so that the cracking effect is ensured, and the V-shaped groove is added in the mold when the crank arm connecting rod is plastic in the early period, the inner wall of the formed big end of the crank arm connecting rod is provided with a V-shaped groove, and the shape is beneficial to the concentration of stress at the turning part of the V-shaped groove, so that the occurrence of cracking becomes controllable, and the scrapping and loss of materials are reduced.
1. The automatic cracking of the crank connecting rod is realized.
2. Simple structure and no need of expensive precise instrument.
3. The cracking effect is controllable, and the material loss is reduced.
4. The confusion of materials is avoided, and automatic sorting is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a front view of an automatic crank link cracking apparatus according to an embodiment of the present invention;
FIG. 2 is a left side view of an automatic crank link cracking apparatus according to an embodiment of the present invention;
FIG. 3 is a right side view of an automatic crank link cracking apparatus according to an embodiment of the present invention;
FIG. 4 is a top view of an automatic crank link cracking apparatus according to an embodiment of the present invention;
FIG. 5 is a sectional view taken along line A-A of FIG. 4;
FIG. 6 is a first perspective view of an automatic crank connecting rod cracking apparatus according to an embodiment of the present invention;
FIG. 7 is a second perspective view of an automatic crank connecting rod cracking apparatus according to an embodiment of the present invention;
FIG. 8 is a first perspective view of a cracking mold of an automatic cracking apparatus for a crank connecting rod according to an embodiment of the present invention;
FIG. 9 is a second perspective view of a cracking mold of the automatic cracking device for crank connecting rods according to the embodiment of the present invention;
FIG. 10 is a perspective view of a splitting wedge of an automatic crank link cracking apparatus according to an embodiment of the present invention;
FIG. 11 is a perspective view of a cam mechanism of an automatic crank link cracking apparatus according to an embodiment of the present invention;
FIG. 12 is a perspective view of a robotic arm of an automatic crank link breaking apparatus according to an embodiment of the present invention;
FIG. 13 is a perspective view of a table of an automatic crank link cracking apparatus according to an embodiment of the present invention;
FIG. 14 is a perspective view of the crank arm link prior to fracture;
FIG. 15 is a perspective view of the crank arm link after it has been broken;
in the figure:
1. a work table; 1a, a through hole; 1a1, guide groove;
2. a cracking mould; 2a, a supporting plate; 2b, fixing grooves; 2c, the front part of the cracking seat; 2d, a sliding chute; 2e, a slide block; 2f, cracking to prepare a rear part;
3. a top platen;
4. a splitting wedge;
5. a top rod; 5a, a guide strip;
6. a cam mechanism; 6a, a rotation driving mechanism; 6b, a lifting platform; 6b1, guide groove; 6b2, ascending section; 6b3, descending section;
7. a reset mechanism; 7a, a push rod; 7a1, pulleys; 7b, an annular wall; 7b1, first interval; 7b2, second interval; 7b3, transition interval; 7c, a guide sleeve;
8. a carrying mechanism; 8a, a mechanical arm; 8a1, an electromagnet; 8b, a linear transmission mechanism.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being fixed or detachable or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 15, the automatic cracking device for the crank connecting rod comprises a workbench 1, a cracking mold 2, a top pressing plate 3, a cracking wedge 4, a mandril 5 and a cam mechanism 6, wherein the workbench 1 is further provided with a through hole 1 a;
workstation 1 sets up on cam mechanism 6, and the even circumference of a plurality of groups schizolysis mould 2 is fixed on workstation 1, and through-hole 1a sets up in schizolysis mould 2 bottoms, and top clamp plate 3 sets up in workstation 1 top, and 2 tops of schizolysis mould are hugged closely to 3 bottoms of top clamp plate, and the mobilizable grafting of ejector pin 5 is in through-hole 1a, and schizolysis wedge 4 is fixed at 5 tops of ejector pin, and 6 ground connections of cam mechanism.
The staff places the connecting rod that needs to rise absolutely in the schizolysis mould 2 of workstation 1, and cam mechanism 6 drives the rotation of workstation 1 and makes ejector pin 5 upwards slide along through-hole 1a simultaneously, thereby schizolysis wedge 4 upwards moves along with ejector pin 5 together and forces schizolysis mould 2 to extrude connecting rod big end inner wall wherein, and top clamp plate 3 presses the connecting rod and makes it can't break away from schizolysis mould 2 in schizolysis mould 2, and the connecting rod big end rises absolutely because of the atress.
The cracking mould 2 comprises a supporting plate 2a, a fixed groove 2b, a front part 2c of a cracking seat, a sliding groove 2d and a sliding block 2 e;
the supporting plate 2a is fixed above the workbench 1, the fixing groove 2b is a groove which is arranged on the supporting plate 2a and has a shape matched with the connecting rod, a gap is reserved at one end far away from the axis direction of the workbench 1, the front part 2c of the cracking seat is a semi-cylinder which is fixed on the fixing groove 2b, the circle center of the semi-cylinder and the circle center of the big end of the connecting rod which is arranged in the cracking mould 2 are positioned at the same position, the diameter of the semi-cylinder is less than or equal to the inner diameter of the big end of the connecting rod, the sliding grooves 2d are arranged on the inner walls of the two sides of the fixing groove 2b far away from the axis of the workbench 1, the sliding block 2e is slidably arranged in the sliding grooves 2d, the rear part 2f of the cracking seat is fixedly arranged on the sliding block 2e, the rear part 2f of the cracking seat is a semi-cylinder which can be combined with the front part 2c of the cracking seat into a complete cylinder, the bottom parts 2f of the front part 2c and the rear part 2f of the cracking seat are provided with a wedge-cylinder in a non-working state, under the working state, the front part 2c of the cracking seat is separated from the rear part 2f of the cracking seat.
The connecting rod is placed in a fixing groove 2b of the supporting plate 2a, the connecting rod can be fixed in the horizontal direction due to the shape fit of the connecting rod and the fixing groove, in a non-working state, a front portion 2c of the cracking seat and a cracking making rear portion 2f form a complete cylinder, the large end of the connecting rod is sleeved on the cylinder, when the wedge-shaped groove at the bottom of the front portion 2c and the cracking making rear portion 2f of the cracking seat are stressed, the front portion 2c and the cracking making rear portion 2f of the cracking seat can be subjected to separating force in the horizontal direction, the cracking making rear portion 2f moves along with the sliding block 2e in the direction far away from the front portion 2c of the cracking seat, and the front portion 2c and the cracking making rear portion 2f of the cracking seat jointly act on the inner wall of the large end of the connecting rod to expand towards the horizontal direction, so that the inner wall of the large end of the connecting rod is expanded towards the horizontal direction to generate expansion fracture at a stress concentration position.
The cam mechanism 6 comprises a rotary driving mechanism 6a and a lifting platform 6b, wherein the lifting platform 6b further comprises a guide groove 6b1, a rising section 6b2 and a falling section 6b 3;
the rotary driving mechanism 6a is arranged below the workbench 1, the top of the rotary driving mechanism 6a is fixedly connected with the workbench 1, the rotary driving mechanism 6a and the workbench 1 are collinear in axis, the lifting platform 6b is fixed on the periphery of the rotary driving mechanism 6a, the lifting platform 6b is an annular platform surface, the guide groove 6b1 is arranged on the lifting platform 6b, the arc surface of the bottom of the ejector rod 5 abuts against the guide groove 6b1, the ascending section 6b2 is a section which smoothly ascends on the guide groove 6b1, and the descending section 6b3 is a section which smoothly descends and is smoothly connected with the ascending section 6b 2.
The rotary driving mechanism 6a is a precise rotary disk; the rotary driving mechanism 6a drives the workbench 1 to rotate, the through hole 1a rotates along with the workbench 1, the push rod 5 rotates along with the through hole 1a, when the push rod 5 rotates to the ascending section 6b2, the push rod 5 is acted by the ascending force exerted by the ascending platform 6b, the push rod 5 moves upwards in the through hole 1a, so that the cracking wedge 4 at the top of the push rod 5 moves upwards, when the workbench 1 rotates to the tail end of the ascending section 6b2, the push rod 5 and the cracking wedge 4 are at the highest position, and then the push rod 5 and the cracking wedge 4 gradually descend to the initial position in the descending section 6b 3.
The reset mechanism 7 comprises a push rod 7a and an annular wall 7b, wherein the annular wall 7b comprises a first section 7b1, a second section 7b2 and a transition section 7b 3;
the reset mechanism 7 is arranged on the periphery of the workbench 1, one end of a push rod 7a is fixedly connected with the tail end of the rear part 2f of the splitting seat, the push rod 7a horizontally penetrates through the peripheral wall of the supporting plate 2a, the other end of the push rod 7a points to the annular wall 7b, a first section 7b1, a second section 7b2 and a transition section 7b3 are three arc-shaped walls with different diameters on the inner side of the push rod 7a, wherein the inner diameter of the first section 7b1 is the smallest, the inner diameter of the second section 7b2 is larger than that of the first section 7b1, the head end of the transition section 7b3 is connected with the first section 7b1, the tail end of the transition section 7b3 is connected with the second section 7b2, the transition section 7b3 is a uniform transition section of the inner diameters of the first section 7b1 and the second section 7b2, and the second section 7b2 is arranged at the stage where the rear part 2f is far away from the front part 2c of the splitting seat.
When the workbench 1 drives the cracking mould 2 to rotate to the position of starting to expand and break, the annular wall 7b just enters the second section 7b2 from the first section 7b1, so that an outward extending space is provided for the push rod 7a, then the cracking rear part 2f pushes the push rod 7a to extend towards the inner wall of the second section 7b2, after the expanding and breaking operation is completed, the push rod 7a is rotated to the second section 7b2, the inner wall of the second section 7b2 pushes the tail end of the push rod 7a attached with the inner wall of the second section 7b to enable the push rod 7a to retract towards the axial center direction, and when the push rod 7a moves to the first section 7b1, the cracking rear part 2f is pushed by the push rod 7a to reset and is attached with the front part 2c of the cracking seat again.
The push rod 7a is also provided with a pulley 7a 1;
a pulley 7a1 is provided at the end of the push rod 7a adjacent the annular wall 7 b.
The sliding friction between one end of the push rod 7a close to the annular wall 7b and the inner wall of the annular wall 7b is changed into rolling friction by arranging the pulley 7a1, so that the loss caused by friction is reduced, and the running effect of the equipment is further ensured.
The resetting mechanism 7 is also provided with a guide sleeve 7 c;
the guide sleeve 7c is fixed on the workbench 1, and the inner diameter of the guide sleeve 7c is equal to the outer diameter of the push rod 7 a.
The push rod 7a is further limited by additionally arranging the guide sleeve 7c, so that the push rod 7a can only move close to and far away from the axis of the workbench 1 in the horizontal direction, and the resetting effect is ensured.
The device also comprises a carrying mechanism 8, wherein the carrying mechanism 8 comprises a mechanical arm 8a and a linear transmission mechanism 8 b;
the linear transport mechanism 8b is provided on the side of the table 1, and the robot arm 8a is provided between the table 1 and the linear transport mechanism 8 b.
The linear transmission mechanism 8b is a belt conveyor; the broken connecting rods are conveyed away in pairs by the conveying mechanism 8, so that the problem that the materials cannot be paired due to mixing is avoided, the mechanical arm 8a conveys the two parts of the broken connecting rods to the linear transmission mechanism 8b together, and the linear transmission mechanism 8b conveys the materials to a worker.
The working end of the mechanical arm 8a is mounted with an electromagnet 8a 1.
The electromagnet 8a1 is an illitecus miniature electromagnet; the electromagnet 8a1 is electrified to generate magnetic force, the mechanical arm 8a enables the electromagnet 8a1 to approach the cracking die 2, the broken part is attracted to the electromagnet 8a1, the mechanical arm 8a conveys the electromagnet 8a1 and the part to the position above the linear conveying mechanism 8b, at the moment, the electromagnet 8a1 is powered off, the magnetism disappears, and the part lightly falls on the linear conveying mechanism 8 b.
The through hole 1a is also provided with a guide groove 1a1, and the ejector rod 5 is also provided with a guide strip 5 a;
the guide grooves 1a1 are radially and symmetrically arranged on the inner wall of the through hole 1a, the guide strips 5a are radially and symmetrically arranged on two sides of the outer wall of the ejector rod 5, and the sizes of the guide grooves 1a1 and the guide strips 5a are matched.
The condition of rotation probably appears when ejector pin 5 reciprocates in through-hole 1a, can lead to the rotation of schizolysis wedge 4 and then can't accurately accomplish the disconnected operation that rises, for preventing this kind of condition from appearing, add through-hole 1a at through-hole 1a inner wall, add gib block 5a at ejector pin 5 outer wall, only can do linear reciprocating motion and can not take place the rotation when making ejector pin 5 remove in through-hole 1a for schizolysis wedge 4 can not take place the skew and then guarantee to rise disconnected effect.
The inner wall of the big end of the crank arm connecting rod is provided with a V-shaped groove.
The V-shaped groove is added in the die when the crank arm connecting rod is in early plasticity, so that the inner wall of the formed big end of the crank arm connecting rod is provided with the V-shaped groove, the shape is favorable for stress concentration at the turning part of the V-shaped groove, further the occurrence of cracking becomes controllable, and the scrapping and loss of materials are reduced.
The working principle of the invention is as follows:
a worker places a connecting rod needing to be broken in a cracking mould 2 of a workbench 1, a cam mechanism 6 drives the workbench 1 to rotate and simultaneously enables an ejector rod 5 to slide upwards along a through hole 1a, a cracking wedge 4 moves upwards along with the ejector rod 5 so as to force the cracking mould 2 to extrude the inner wall of the large end of the connecting rod, the connecting rod is pressed in the cracking mould 2 by a top pressure plate 3 and cannot be separated from the cracking mould 2, the large end of the connecting rod is broken due to stress, sliding friction between one end, close to an annular wall 7b, of a push rod 7a and the inner wall of the annular wall 7b is changed into rolling friction through a pulley 7a1, loss caused by friction is reduced, the operation effect of the device is further ensured, when the workbench 1 drives the cracking mould 2 to rotate to the position where the cracking mould starts to be broken, the annular wall 7b just enters a second interval 7b2 from a first interval 7b1, and accordingly, a space extending outwards is provided for the push rod 7a, then the rear part 2f of the cracking process pushes the push rod 7a to extend towards the inner wall of the second section 7b2, after the cracking operation is completed, the push rod 7a is rotated to the second section 7b2, the inner wall of the second section 7b2 pushes the tail end of the push rod 7a attached with the inner wall of the second section 7b to enable the push rod 7a to retract towards the axis direction, when the push rod 7a moves to the first section 7b1, the rear part 2f of the cracking process is pushed by the push rod 7a to reset and attached with the front part 2c of the cracking seat again, the sliding friction between one end of the push rod 7a close to the annular wall 7b and the inner wall of the annular wall 7b is changed into rolling friction by arranging the pulley 7a1, the loss caused by the friction is reduced, the operation effect of the equipment is further ensured, the push rod 7a is further limited by the guide sleeve 7c, the push rod 7a is ensured to only move close to and far away from the axis of the workbench 1 in the horizontal direction, the resetting effect is ensured, the broken connecting rods are conveyed away in pairs by arranging the conveying mechanism 8, so that the situation that the materials cannot be paired due to the fact that the materials are mixed is avoided, the mechanical arm 8a conveys two parts of the broken connecting rods to the linear transmission mechanism 8b together, the linear transmission mechanism 8b conveys the materials to a worker, the electromagnet 8a1 is arranged on the mechanical arm 8a, the electromagnet 8a1 is electrified to generate magnetic force, the electromagnet 8a1 is close to the cracking mould 2 by the mechanical arm 8a, the broken parts are sucked to the electromagnet 8a1, the electromagnet 8a1 and the parts are conveyed to the position above the linear transmission mechanism 8b by the mechanical arm 8a together, at the moment, the electromagnet 8a1 is powered off, the magnetism disappears, the parts are slightly dropped on the linear transmission mechanism 8b, the situation that the cracking wedge 4 rotates when the push rod 5 moves up and down in the through hole 1a possibly occurs, and the cracking wedge 4 can be caused to rotate and further cannot accurately complete the breaking operation, in order to prevent the situation, the through hole 1a is additionally arranged on the inner wall of the through hole 1a, the guide strip 5a is additionally arranged on the outer wall of the ejector rod 5, the ejector rod 5 only can do linear reciprocating motion and cannot rotate when moving in the through hole 1a, the cracking wedge 4 cannot deviate and further the cracking effect is guaranteed, the V-shaped groove is additionally formed in the die when the crank arm connecting rod is in early plasticity, the inner wall of the formed big end of the crank arm connecting rod is provided with the V-shaped groove, the stress is favorably concentrated at the turning position of the V-shaped groove due to the shape, the cracking effect is further controllable, and the scrapping and loss of materials are reduced.
It should be understood that the above-described embodiments are merely preferred embodiments of the invention and the technical principles applied thereto. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, such variations are within the scope of the invention as long as they do not depart from the spirit of the invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.
Claims (1)
1. An automatic cracking device of a crank connecting rod is characterized by comprising a workbench (1), a cracking mould (2), a top pressing plate (3), a cracking wedge (4), a push rod (5) and a cam mechanism (6), wherein the workbench (1) is also provided with a through hole (1 a);
the working table (1) is arranged on the cam mechanism (6), a plurality of groups of cracking molds (2) are uniformly and circumferentially fixed on the working table (1), the through holes (1 a) are formed in the bottoms of the cracking molds (2), the top pressing plate (3) is arranged above the working table (1), the bottoms of the top pressing plates (3) are tightly attached to the tops of the cracking molds (2), the ejector rods (5) are movably inserted into the through holes (1 a), the cracking wedges (4) are fixed on the tops of the ejector rods (5), and the cam mechanism (6) is grounded;
the cracking mould (2) comprises a supporting plate (2 a), a fixed groove (2 b), a front part (2 c) of a cracking seat, a sliding groove (2 d) and a sliding block (2 e);
the supporting plate (2 a) is fixed above the workbench (1), the fixing groove (2 b) is a groove which is arranged on the supporting plate (2 a) and is matched with the connecting rod in shape, a gap is reserved at one end far away from the axis direction of the workbench (1), the front part (2 c) of the cracking seat is a semi-cylinder fixed on the fixing groove (2 b), the circle center of the semi-cylinder and the circle center of the big end of the connecting rod placed in the cracking mould (2) are positioned at the same position, the diameter of the semi-cylinder is smaller than or equal to the inner diameter of the big end of the connecting rod, the sliding groove (2 d) is arranged on the inner walls of two sides of one end, far away from the axis direction of the workbench (1), of the fixing groove (2 b) (2 e) is slidably arranged in the sliding groove (2 d), the rear part (2 f) of the cracking seat is fixedly arranged on the sliding block (2 e), the rear part (2 f) of the cracking seat is a semi-cylinder which can be combined with the front part (2 c) of the cracking seat, the bottoms of the front part (2 c) and the rear part (2 f) of the cracking seat are provided with wedge-shaped grooves, under the non-working state, the front part (2 c) of the cracking seat and the rear part (2 f) of the cracking seat are jointed to form a complete cylinder, and under the working state, the front part (2 c) of the cracking seat and the rear part (2 f) of the cracking seat are separated;
the cam mechanism (6) comprises a rotary driving mechanism (6 a) and a lifting platform (6 b), wherein the lifting platform (6 b) further comprises a first guide groove (6 b 1), a rising interval (6 b 2) and a falling interval (6 b 3);
the rotary driving mechanism (6 a) is arranged below the workbench (1), the top of the rotary driving mechanism (6 a) is fixedly connected with the workbench (1), the axes of the rotary driving mechanism (6 a) and the workbench (1) are collinear, the lifting platform (6 b) is fixed on the periphery of the rotary driving mechanism (6 a), the lifting platform (6 b) is an annular table surface, a first guide groove (6 b 1) is formed in the lifting platform (6 b), the bottom cambered surface of the ejector rod (5) abuts against the first guide groove (6 b 1), the ascending section (6 b 2) is a section which smoothly ascends on the first guide groove (6 b 1), and the descending section (6 b 3) is a section which smoothly descends and is smoothly connected with the ascending section (6 b 2);
the device also comprises a resetting mechanism (7), wherein the resetting mechanism (7) comprises a push rod (7 a) and an annular wall (7 b), and the annular wall (7 b) comprises a first interval (7 b 1), a second interval (7 b 2) and a transition interval (7 b 3);
the reset mechanism (7) is arranged on the periphery of the workbench (1), one end of the push rod (7 a) is fixedly connected with the tail end of the cracking rear part (2 f), the push rod (7 a) horizontally penetrates through the peripheral wall of the supporting plate (2 a), the other end of the push rod (7 a) points to the annular wall (7 b), the first interval (7 b 1), the second interval (7 b 2) and the transition interval (7 b 3) are three sections of arc-shaped walls with different diameters on the inner side of the annular wall (7 b), the inner diameter of the first section (7 b 1) is the smallest, the inner diameter of the second section (7 b 2) is larger than that of the first section (7 b 1), the head end of the transition section (7 b 3) is connected with the first section (7 b 1), the tail end of the transition section (7 b 3) is connected with the second section (7 b 2), the transition section (7 b 3) is a uniform transition section of the inner diameters of the first section (7 b 1) and the second section (7 b 2), and the second section (7 b 2) is arranged at a stage where the rear part (2 f) of the splitting seat is far away from the front part (2 c) of the splitting seat;
the push rod (7 a) is also provided with a pulley (7 a 1);
the pulley (7 a 1) is arranged at one end of the push rod (7 a) close to the annular wall (7 b);
the resetting mechanism (7) is also provided with a guide sleeve (7 c);
the guide sleeve (7 c) is fixed on the workbench (1), and the inner diameter of the guide sleeve (7 c) is equal to the outer diameter of the push rod (7 a);
the device also comprises a carrying mechanism (8), wherein the carrying mechanism (8) comprises a mechanical arm (8 a) and a linear transmission mechanism (8 b);
the linear transmission mechanism (8 b) is arranged on one side of the workbench (1), and the mechanical arm (8 a) is arranged between the workbench (1) and the linear transmission mechanism (8 b);
an electromagnet (8 a 1) is arranged at the working end of the mechanical arm (8 a);
the through hole (1 a) is also provided with a second guide groove (1 a 1), and the ejector rod (5) is also provided with a guide strip (5 a);
the second guide grooves (1 a 1) are radially and symmetrically arranged on the inner wall of the through hole (1 a), the guide strips (5 a) are radially and symmetrically arranged on two sides of the outer wall of the ejector rod (5), and the second guide grooves (1 a 1) are matched with the guide strips (5 a) in size;
the inner wall of the big end of the crank arm connecting rod is provided with a V-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010669763.0A CN111842612B (en) | 2019-10-11 | 2019-10-11 | Automatic cracking equipment for crank connecting rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010669763.0A CN111842612B (en) | 2019-10-11 | 2019-10-11 | Automatic cracking equipment for crank connecting rod |
| CN201910964115.5A CN110732727B (en) | 2019-10-11 | 2019-10-11 | Automatic cracking equipment for crank connecting rod |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910964115.5A Division CN110732727B (en) | 2019-10-11 | 2019-10-11 | Automatic cracking equipment for crank connecting rod |
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| CN111842612B true CN111842612B (en) | 2022-02-01 |
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| CN202010669763.0A Active CN111842612B (en) | 2019-10-11 | 2019-10-11 | Automatic cracking equipment for crank connecting rod |
| CN201910964115.5A Active CN110732727B (en) | 2019-10-11 | 2019-10-11 | Automatic cracking equipment for crank connecting rod |
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| CN201910964115.5A Active CN110732727B (en) | 2019-10-11 | 2019-10-11 | Automatic cracking equipment for crank connecting rod |
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Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7250070B2 (en) * | 2003-06-10 | 2007-07-31 | Honda Giken Kogyo Kabushiki Kaisha | Fractured powder metal connecting rod and a method of manufacturing the same |
| JP2007132414A (en) * | 2005-11-09 | 2007-05-31 | Honda Motor Co Ltd | Method of manufacturing connecting rod |
| CN102039444A (en) * | 2010-11-04 | 2011-05-04 | 奇瑞汽车股份有限公司 | Connecting rod cracking device and using method thereof |
| DE102013016352B4 (en) * | 2013-10-01 | 2016-07-28 | Alfing Kessler Sondermaschinen Gmbh | Fracture splitting device |
| KR101602118B1 (en) * | 2015-11-30 | 2016-03-09 | 주식회사 대송 | A connecting rod processing jig |
| CN106425516A (en) * | 2016-12-14 | 2017-02-22 | 盛瑞传动股份有限公司 | Connecting rod cracking and assembling equipment and process |
| CN106826149B (en) * | 2017-01-10 | 2019-01-08 | 西安交通大学 | Radial cams load and the low-cycle fatigue cracking apparatus of Split link cracking |
| CN206925552U (en) * | 2017-03-28 | 2018-01-26 | 武汉喧越智能装备有限公司 | A kind of automatic tensioning of engine link discharges dirt pre-loading mechanism from |
| CN206702050U (en) * | 2017-04-06 | 2017-12-05 | 北京北内柴油机有限责任公司 | Connecting rod cracking device |
| CN107398692A (en) * | 2017-07-19 | 2017-11-28 | 江苏大学 | A kind of processing unit (plant) and method of connecting rod resonance Assisted Cleavage |
| CN108723737A (en) * | 2018-07-14 | 2018-11-02 | 邱丹 | Rise disconnected crank connecting link cleaning, drying and assembly device |
| CN208945574U (en) * | 2018-07-21 | 2019-06-07 | 邱丹 | Automatic tensioning for crank connecting link breaks and charging & discharging machine |
| CN108747372A (en) * | 2018-07-21 | 2018-11-06 | 邱丹 | Automatic tensioning suitable for crank connecting link breaks and charging-discharging mechanism |
| CN208614154U (en) * | 2018-07-23 | 2019-03-19 | 成都天创精密模具有限公司 | A kind of feeding mould group with Machine Vision Detection function |
| CN208644559U (en) * | 2018-08-28 | 2019-03-26 | 青岛慧海智造科技有限公司 | A kind of processing of robots center feed device |
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2019
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| Publication number | Publication date |
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| CN111842612A (en) | 2020-10-30 |
| CN110732727A (en) | 2020-01-31 |
| CN110732727B (en) | 2020-10-20 |
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