CN111203505A

CN111203505A - Trimming die for crankshaft forging

Info

Publication number: CN111203505A
Application number: CN202010134799.9A
Authority: CN
Inventors: 陈莉; 仇晓亮; 王泽刚
Original assignee: Liaoning 518 Internal Combustion Engine Fittings Co ltd
Current assignee: Liaoning 518 Internal Combustion Engine Fittings Co ltd
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2020-05-29

Abstract

The invention discloses a crankshaft forging trimming die.A stop groove is formed in an upper die plate on two sides of a trimming upper die, one end of a stop sleeve is fixed in the stop groove, and the other end of the stop sleeve is fixed with a trimming pushing plate; a push rod hole is formed in the trimming upper die; a connecting piece frame is arranged in a space between the lower part of the lower base plate and the two vertical plates; a piston rod of the cylinder is connected with the connecting piece frame; the connecting piece frame is fixedly supported with the connecting piece; the invention has the advantages that: the length size of the forging piece, the surface quality of residual flash and the like are ensured; guaranteed the forging and can catch the forging apart from the nearer position of blade when cutting edge, avoided the forging to produce the rotation when falling down simultaneously, on transmitting the forging to the transport manipulator clamp accurately again, guaranteed the beat stability of side cut process, provide the guarantee for automated production.

Description

Trimming die for crankshaft forging

Technical Field

The invention relates to the field of forging, in particular to a device for cutting off flash of a forged piece.

Background

In the crankshaft trimming process, due to the shearing and local upsetting processes of the trimming upper die and the trimming lower die, the flash and the trimming upper die are easy to warp and roll to the trimming upper die due to shearing deformation, and the forge piece is easy to stick to the trimming upper die due to local upsetting. Have the operative employee to glue during production and push and press manually the forging and the overlap of cutting edge upper die, if it is longer to bulldoze the time, can influence the production of next forging, the side cut temperature of next forging probably reduces promptly, leads to the length dimension of the forging after the forging is cut edge and remains the size of overlap unstable, increases subsequent coping and remains the overlap time, is unfavorable for the promotion of whole production line operation beat. If the automatic production is carried out, the fins or the forged piece can be stuck to the trimming upper die, so that the forged piece or the fins cannot be grabbed by a manipulator, the production line is abnormally stopped, and process waste products are generated. For non-quenched and tempered steel forgings, if the production beat and temperature of the trimming procedure cannot be guaranteed, indexes such as hardness and mechanical properties of the forgings cannot be guaranteed.

In addition, traditional bent axle is at the side cut process, and the forging can be directly dropped to the lower bolster through side cut lower bolster after the side cut, is dragged out by the manual work, and transmission such as reuse chain drive or slide is to next process. Because the heights of the crank arms, the balance weights, the flanges and the like of the crankshaft forging are different, the local contact phenomenon is caused when the forging falls to the lower template, and the forging is collided and damaged by the local contact phenomenon. The position of the forge piece is uncertain when the forge piece falls due to the fact that the forge piece rotates when falling, the stop direction of the forge piece is uncertain, and the forge piece can not be taken by a manipulator end, so that the automatic production is not suitable.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a trimming die for crankshaft forgings, which comprises an upper trimming die and a lower trimming die, wherein the crankshaft forgings are arranged between the upper trimming die and the lower trimming die, and concave-convex surfaces matched with the shapes of the crankshaft forgings are arranged on the sides of the upper trimming die and the lower trimming die, which are in contact with the crankshaft forgings; the trimming upper die comprises an upper die plate, and the upper die plate is fixed with the sliding block; the method is characterized in that:

the trimming upper die is fixed on an upper base plate, a cover plate is arranged above the upper base plate, and an upper die plate is connected with a sliding block;

the upper die plates on the two sides of the trimming upper die are provided with stop grooves, one end of a stop sleeve is fixed in the stop grooves, the other end of the stop sleeve is fixed with a flash pushing plate, and a flash pushing spring is arranged in the stop sleeve; the through hole in the middle of the flash pushing plate is matched with the outline of the flash; the trimming upper die is provided with a push rod hole, one end of the push rod with a convex edge is arranged in the push rod hole, and the other end of the push rod is protruded out of the molded surface of the trimming upper die; a push spring is arranged in the push rod hole, two ends of the push spring are respectively abutted against the push rod and a push rod gland, and the push rod gland is fixed on the upper backing plate and is flush with the surface of the upper backing plate;

the lower template is symmetrically provided with vertical plates, a lower base plate is lapped above the vertical plates, and the lower base plate is provided with a trimming lower die; a connecting piece frame is arranged in a space between the lower part of the lower base plate and the two vertical plates; the connecting piece frame comprises an air cylinder and a U-shaped cross beam which are arranged on the lower template at two sides of the lower base plate, horizontal connecting parts are arranged at two ends of the cross beam, and reinforcing ribs are arranged between the connecting parts and the cross beam; a piston rod of the cylinder is fixed with the connecting part; the cross beam is supported and fixed with the connecting piece; the connecting piece support comprises a connecting plate, the connecting plate is provided with a through hole, and a bolt is inserted into the through hole of the connecting plate from the through hole at the beam end and then is fixed with a nut; the connecting plate is fixed with a V-shaped iron, a connecting rod connecting piece short plate and a connecting rod connecting piece long plate; the crossbeam and riser butt, the face of crossbeam and riser contact all sets up lubricated groove.

The stop sleeve comprises a stop sliding sleeve, the outer edge end of the bulge of the stop sliding sleeve is arranged in the stop groove, the inner part of the stop sliding sleeve is provided with a flange pushing spring, and the end part of the stop sliding sleeve and the flange pushing plate are fixed through bolts.

In order to add a lubricant conveniently, the through hole on the cross beam is arranged at the bottom of the lubricating groove, and the bolt is sleeved with the sealing ring and then penetrates through the through hole to be connected with the nut, so that the lubricant, such as graphite powder and the like, can be added through the through hole;

in order to ensure balance and prevent the over-large impact on the vertical plate when the workpiece falls, the symmetry center of the V-shaped iron is consistent with the axis of the piston rod of the air cylinder.

The invention has the advantages that: the problem that the forging is easy to stick to the trimming upper die due to local upsetting is solved, the labor intensity of workers is reduced, the consistency of production beats is ensured, and the surface quality of the forging, such as the length size, the residual flash and the like is ensured; the temperature of the non-quenched and tempered steel forging at the beginning of air cooling is ensured, so that the hardness and mechanical performance indexes of the forging are ensured, and the full-automatic production of the whole crankshaft forging line is ensured. Space for observing the clearance between the upper die and the lower die of the trimming edge is provided in the design, and installation and replacement space for the boiler head and the like is designed, so that the installation and the adjustment are convenient; guaranteed the forging and can catch the forging apart from the nearer position of blade when cutting edge, avoided the forging to produce the rotation when falling down simultaneously, on transmitting the forging to the transport manipulator clamp accurately again, guaranteed the beat stability of side cut process, provide the guarantee for automated production.

Drawings

FIG. 1 is a bottom view of the trimming upper die of the present invention;

FIG. 2 is a schematic cross-sectional view taken at the location A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken at the location B-B of FIG. 1;

FIG. 4 is a schematic view of the push rod and the mold surface;

FIG. 5 is a schematic view of a stop sleeve structure;

FIG. 6 is a schematic structural view of the trimming lower die;

FIG. 7 is a side cross-sectional view of the shaft of FIG. 6;

FIG. 8 is a detail view of the connector frame;

FIG. 9 is a detail view of the link support;

FIG. 10 is a view of the placement of a forging on a receiver support;

in the figure, 11, a trimming plate, 12, an upper plate, 13, a trimming upper die, 14, a spring stop sleeve, 15, a trimming spring, 16, a cover plate, 17, a push rod, 18, a push spring, 19, an upper cushion plate, 110, a push rod gland, 111 and a slide block.

1. The lower bolster, 2, the union piece frame, 3, the lower bolster, 4, the side cut lower mould, 5, the union piece supports, 6, the riser, 7, the workstation, 21, the cylinder, 22 crossbeam, 3, the spliced pole, 24, the gasket, 25 bolts, 26 connecting portion, 27 strengthening rib, 51, the connecting plate, 52, V type iron, 53, connecting rod union piece short slab, 54, connecting rod union piece long slab.

Detailed Description

The invention is specifically described below with reference to the accompanying drawings, and as shown in the drawings, the invention comprises an upper trimming die 13 and a lower trimming die, a crankshaft forging 10 is arranged between the upper trimming die and the lower trimming die, and a concave-convex surface 131 matched with the shape of the crankshaft forging is arranged on one side of the upper trimming die and the lower trimming die, which is in contact with the crankshaft forging; the trimming upper die comprises an upper die plate 12, the upper die plate is fixed with a sliding block 111, and the sliding block 111 is fixed with a pressure head;

the trimming upper die 13 is fixed on an upper backing plate 19, a cover plate 16 is arranged above the upper backing plate 19, and the cover plate 16 is connected with a sliding block 111;

the upper die plates 12 on the two sides of the trimming upper die 13 are provided with stop grooves, one end of a stop sleeve 14 is fixed in the stop grooves, the other end of the stop sleeve is fixed with the flash pushing plate 11, and a flash pushing spring 15 is arranged in the stop sleeve; the through hole in the middle of the flash pushing plate 11 is matched with the outline of the flash to ensure that the flash is separated from the workpiece after being cut off; the trimming upper die 13 is provided with a push rod hole, one end of the push rod 17 with a convex edge is arranged in the push rod hole, and the other end 171 of the push rod 17 is protruded above the molded surface 131 of the trimming upper die. The push rod is used for ejecting a workpiece embedded into the groove of the molded surface of the trimming upper die in the process of trimming the flash, so that the forging is prevented from being adhered to the trimming upper die due to local upsetting;

the push rod hole is internally provided with a push spring 18, two ends of the push spring 18 are respectively abutted against the push rod 17 and the push rod gland 110, and the push rod gland 110 is fixed on the upper backing plate 19 and is flush with the surface of the upper backing plate 19.

The stop sleeve 14 comprises a stop sliding sleeve 141, the convex outer edge end 142 of the stop sliding sleeve 141 is arranged in the stop groove 121, the inner part 141 of the stop sliding sleeve is provided with a push flash spring 15, and the end part of the stop sliding sleeve and the push flash plate 11 are fixed through bolts.

The invention designs a flash pushing plate, a cover plate, an upper backing plate, a spring stop sleeve, a flash pushing spring, a push piece ejector rod and an ejector rod gland on the basis of the original trimming die. The method is characterized in that the existing die holder die space is utilized, an additional ejection mechanism and the like are not needed to be added, grooves for containing spring stop sleeves are designed on two sides of the trimming upper die plate, corresponding bolt hole grooves are formed in the trimming pushing plate, the trimming pushing springs are placed in the spring stop sleeves, the spring stop sleeves with the springs are placed in the grooves corresponding to the trimming upper die plate, and the stroke of the spring base and the types, the elasticity and the quantity of the springs are determined through calculation. And fixing a cover plate compression spring on the upper template, and connecting the flash pushing plate with the upper template through bolts. The press sliding block moves downwards, the flash plate is pushed to press the flash, the trimming upper die enters the lower die to finish trimming, the press sliding block moves upwards, and the spring releases elasticity to push the flash to be placed on the parting surface of the trimming lower die through the flash plate.

The trimming upper die is connected with the cover plate through the upper base plate, the cover plate is connected with the trimming upper die plate, and the trimming upper die plate is connected with the press slide block. 2-5 push rod holes are designed in the trimming upper die and the upper backing plate according to the length of the forged piece, the push piece ejector rod is placed in the push rod hole, when the press machine slide block moves downwards, the push piece ejector rod spring is compressed, the elasticity reaches the maximum at the bottom dead point, and when the press machine slide block moves upwards, the elasticity is released to push the forged piece downwards and fall into the piece connecting device. The through hole in the middle of the flash pushing plate is required to be designed to be basically consistent with the shape of the forged piece, the whole contour is 3-5mm larger than the periphery of the hot forged piece, and the thrust is guaranteed to be allowed to act on the flash.

The used flash pushing spring and the used pushing spring are generally rectangular springs, and because the springs are square wires, the spring strength of the springs is much larger than that of a common round spring, and the fatigue resistance of the springs is better than that of a common spring.

The stroke space of the spring stop sleeve is larger than 15-20mm of the cutting depth, and the effective stroke of the flash-removing plate is larger than 15-20mm of the cutting depth. The flash-removing plate spring is used symmetrically.

The original height of the ejector rod of the push piece is 15-20mm higher than that of the cavity.

According to the invention, the existing die holder die space is utilized, other equipment and the like are not required to be added, the trimming is ensured to be completed, simultaneously, the flash is stably pushed and placed on the trimming cutting edge surface, the forge piece is stably and accurately dropped into the material receiving device under the action of the pushing force of the ejector rod, and the guarantee is provided for the automatic production of the trimming process. The upper moving surface and the lower moving surface of the spring stop sleeve in the upper die plate are in clearance fit, and the connecting surface of the spring stop sleeve and the flash pushing plate is also in clearance fit, so that a small clearance is reserved between the shape of a pushing piece of the flash pushing plate connected with the spring stop sleeve and the outline of a forged piece, no warping, no deformation and other delayed dropping conditions are ensured when the flash is pushed down, the position of the pushed flash is accurate, and the guarantee is provided for a manipulator to grab the flash. The forge piece ejector rod is pushed, the forge piece is accurately pushed into the piece connecting device by releasing the elastic force of the spring in the trimming upper die at the moment that trimming of the forge piece is completed and the pressure slide block moves upwards, the labor intensity of workers is reduced, the consistency of production beats is ensured, the length and the size of the forge piece, the surface quality such as residual flashes is ensured, and the temperature of the non-quenched and tempered steel forge piece starting air cooling is ensured, so that the hardness and the mechanical performance index of the forge piece are ensured, and the full-automatic production of the whole crankshaft forging line is ensured. The space for observing the gap between the trimming convex-concave die is provided in the design, the installation and replacement space of the furnace size and other character heads is designed, and the installation and the adjustment are convenient.

The lower template 1 is symmetrically provided with vertical plates 6, a lower base plate 3 is lapped above the vertical plates 6, and the lower base plate 3 is provided with a trimming lower die 4; a connecting piece frame 2 is arranged in a space between the lower part of the lower backing plate 3 and the two vertical plates 6; the connecting piece frame 2 comprises an air cylinder 21 and a U-shaped cross beam 22 which are arranged on the lower template 1 at two sides of the lower bolster, two ends of the cross beam 22 are provided with horizontal connecting parts 26, and a reinforcing rib 27 is arranged between each connecting part and the cross beam; a piston rod of the cylinder 21 is fixed with the connecting part 26; the cross beam 22 is fixed with the connecting piece support 5; the connecting piece support 5 comprises a connecting plate 51, the connecting plate is provided with a through hole, and a bolt is inserted into the through hole of the connecting plate from the through hole at the end of the cross beam 22 and then is fixed with a nut; a V-shaped iron 52, a connecting rod connecting piece short plate 53 and a connecting rod connecting piece long plate 54 are fixed on the connecting plate; crossbeam 22 and riser 6 butt, the face of crossbeam 22 and riser 6 contact all sets up the lubrication groove, lubrication groove mutually perpendicular on the crossbeam and the riser, for many lubrication grooves 6B of vertical direction, the crossbeam is the lubrication groove 5B of horizontal direction like the lubrication groove of riser to take place to interfere when avoiding the crossbeam to remove.

In order to add lubricant conveniently, the through hole in the cross beam is arranged at the bottom of the lubricating groove, the bolt is sleeved with the sealing ring and then penetrates through the through hole to be connected with the nut, and therefore the lubricant can be added by injecting the lubricant into the through hole after the nut is detached;

The using method of the invention is as follows:

the using method of the trimming lower die comprises the following steps:

before the trimming is started, the cylinder receives a signal to move upwards, a part which is about 120mm lower than the edge face of the trimming female die waits for a forged piece, after the press moves downwards to cut off the flash of the forged piece, the forged piece falls on a forged piece support in the forged piece device, the cylinder moves downwards to drive the forged piece support to move downwards, and the forged piece is placed on a clamp of a carrying manipulator waiting for the forged piece support. When the material receiving frame moves up and down, the surface of the cross beam 5A of the material receiving frame uses the side surface 6A of the vertical plate as a guide, otherwise, deflection is easy to generate, and the V shape of the main shaft connecting piece is matched with the diameter of a forged piece. The positions of the short connecting rod connecting pieces and the long connecting rod connecting pieces are arranged according to the diameter of the connecting rod of the forge piece, and the forge piece is exactly horizontal when the forge piece is placed on the V-shaped iron through the height design. The effect of connecting rod union piece short, long board is that the forging takes place to rotate when preventing that the forging from falling to the union piece support, when causing the forging to subsequent handling, can't accurate location. The main shaft connecting piece V-shaped iron is generally arranged at the journals at the two ends of the forging, and the connecting rod journal material receiving plates are arranged at all the connecting rod journals, so that the uniform stress is ensured.

The use method of the trimming upper die comprises the following steps:

changing a furnace number word head and a class group number word head, putting the trimming upper die into the trimming upper die by using a push piece ejector rod, adding a push piece spring, and putting a push piece ejector rod gland in the upper base plate for pressing; and (3) putting the stop sleeve provided with the spring into the upper template, installing the cover plate, and connecting the flash pushing plate with the spring stop sleeve through a bolt.

The device can realize partial universality, and different products only need to be supported by replacing the edge pushing plate, the edge cutting upper die, the upper backing plate part and the connecting piece.

Claims

1. A crankshaft forge piece flash cutting die comprises an upper trimming die and a lower trimming die, wherein a crankshaft forge piece is arranged between the upper trimming die and the lower trimming die, and concave-convex surfaces matched with the shape of the crankshaft forge piece are arranged on one sides of the upper trimming die and the lower trimming die, which are in contact with the crankshaft forge piece; the trimming upper die comprises an upper die plate, and the upper die plate is fixed with the sliding block; the method is characterized in that:

2. The crankshaft forging trimming die according to claim 1, wherein:

3. The crankshaft forging trimming die according to claim 1, wherein: the through hole on the crossbeam sets up in the lubricated tank bottom, and the bolt suit is passed behind the sealing washer the through hole is connected with the nut.

4. The crankshaft forging trimming die according to claim 1, wherein: the symmetry center of the V-shaped iron is consistent with the axis of the piston rod of the air cylinder.