CN218310639U - Upsetting crankshaft pressure maintaining control device - Google Patents

Abstract

The utility model discloses an upset crankshaft pressurize controlling means, the terminal surface sets up pressurize controlling means in one side of lower movable block, pressurize controlling means includes: a base plate and a movable base plate; the base plate is installed on the lower movable block, 2 groups of guide pillar guide sleeves are arranged at opposite angles between the base plate and the movable base plate, 2 groups of reset springs and spring guide screw rods are arranged at the other opposite angles, a double-stroke switch is arranged at the center of the base plate, a stroke adjusting base is installed on the movable base plate, a stroke switch touch arm and a locking nut which can be finely adjusted are arranged on the stroke adjusting base, and a distance adjusting screw rod and a locking nut are arranged between the base plate and the movable base plate. The utility model has the advantages that: when the forging stroke at the last stage of upsetting reaches the requirement of the length dimension of the forge piece, the stroke switch is touched, after the pressure maintaining time is set by the starting time relay, the upsetting tool automatically maintains the pressure to the set time and then unloads, so that the pressure maintaining time at the last stage of upsetting is effectively controlled, the die and the tool are prevented from bearing overlarge loads, and the length dimension of the forge piece can be effectively controlled.

Description

Upsetting crankshaft pressure maintaining control device

Technical Field

The utility model relates to a machining technical field specifically is a forging die of bent axle, more specifically is a pressurize controlling means.

Background

The upsetting forging production process for crankshaft is a production method for separately changing die, locally heating and locally upsetting forging and forming each crank throw. And after the die, the local heating and the local upsetting are intensively and uniformly replaced for each batch of forgings to produce the same crank, the die, the local heating and the local upsetting are intensively and uniformly replaced for the next group of the same crank, and the forging production of the batch of forgings of each crank and the flange of the large-scale crankshaft is completed after the die replacement, the local heating and the local upsetting are performed in multiple batches.

As shown in figure 1, in the upsetting die in the prior art, a press slide block and an upsetting upper jacking tool 30 connected with the press slide block press the upsetting die to move downwards, an upper central shaft 23 of a connecting rod 2 is driven to move downwards, the connecting rod 2 rotates around the upper central shaft 23, a lower central shaft 24 of the connecting rod pushes an upper movable block 4 to drive an upper left die 8 and a lower left die 8 to move towards the center, and a lower movable block 5 is matched with the upper movable block 4 in a passive relation, so that the lower movable block 5 is passively linked with the upper movable block 4 and drives a lower left die 16 and a lower right die 16 to move towards the center to realize horizontal upsetting; meanwhile, the upper middle die 14 and the lower middle die 15 are connected with the upsetting upper jacking tool 30, and press downwards along with the slide block in the downward pressing process of the press slide block. At the end of upsetting, when the left die and the right die are completely contacted with the upper middle die 14 and the lower middle die 15 of the crank throw, upsetting and forming of the forge piece are finished, as shown in fig. 2; at the moment, the pressure of the press on the forging stock, the upsetting tool and the upsetting die reaches the maximum value, and the moment when the forming force of the upsetting forge piece is maximum is also the moment, and the acting force is borne by the die and the tool, so that the length geometric dimension of the forging stock at the effective upsetting forming part can be obtained. In the later stage of upsetting, an operator determines whether to stop upsetting by observing whether a left die and a right die are in contact with a middle crank throw die, if the left die and the right die are not in contact with the middle crank throw die, the upsetting is stopped, the length of a formed forging stock is long, the integral length and the size of a forging piece cannot meet the requirement of machining the finished size of a crankshaft after multiple upsetting are accumulated, and the forging stock is scrapped. An operator can only continuously adopt a press machine to continuously press under high load to ensure that the upsetting tool and the die finish upsetting for forging a certain crank after the press machine is unloaded in a pressing mode after walking in place. Therefore, the pressing time of the press is unnecessarily prolonged, the energy consumption of the upsetting forging process is increased, the press body, the upsetting tool and the upsetting die are damaged by the high-load pressing force along with the long-time pressing, the forged blank formed by forging is scrapped at the moment of damage, and all the energy consumption is wasted.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing an upset forging bent axle pressurize controlling means, upset forging mould including the upset forging that contains the connecting rod seat top frock, connecting rod, go up the movable block, move down the movable block about, on, mould, lower left and right mould, go up middle mould, lower middle mould, the utility model discloses a point lies in: the inner end face of one side of the lower moving block is provided with a pressure maintaining control device, and the pressure maintaining control device comprises: a base plate and a movable base plate; the base plate is arranged on the lower moving block, 2 groups of guide pillar guide sleeves are arranged at opposite angles between the base plate and the moving seat plate, 2 groups of reset springs and spring guide screw rods are arranged at the other opposite angles, a double-stroke switch is arranged at the center of the base plate, a stroke adjusting base is arranged on the moving seat plate, a stroke switch touch arm and a locking nut which can be finely adjusted are arranged on the stroke adjusting base, and a spacing adjusting screw rod and a locking nut are arranged between the base plate and the moving seat plate.

Preferably, the pressure maintaining control device is provided with a housing cover plate, and the base plate and the movable seat plate are arranged at two ends of the housing cover plate.

In order to ensure the linkage of the lower moving block and the upper moving block, the lower moving block is provided with a passive stressed groove, the upper moving block is provided with a convex matching surface, and the convex block is embedded into the groove of the lower moving block. The press slide moves downwards, the pressing force is transferred to the connecting rod through the upsetting jacking tool with the connecting rod seat, the linkage between the other end of the connecting rod and the upper moving block is changed into horizontal upsetting opposite movement, the left upper die and the right upper die mounted on the upper moving block are driven to move horizontally, the convex block of the upper moving block pushes the groove of the summer and winter block, the lower moving block and the left lower die and the right lower die are pushed to move horizontally and oppositely for centering, and horizontal upsetting is formed

The upper moving block and the upsetting upper jacking tool arranged on the press sliding block adopt the following structure: arc surface grooves are formed in two outer sides of each upper moving block, and the outer arc surface of the axis of the connecting rod 24 is abutted to the arc groove surfaces of the upper moving blocks, so that when the press slide block moves downwards, the connecting rod is driven to rotate around the axis 22, and meanwhile, the lower moving blocks are guided and constrained on the workbench, and the rotating motion of the connecting rod is converted into opposite horizontal movement of the upper moving blocks and the lower moving blocks.

The utility model has the advantages that: when the forging stroke at the last stage of upsetting reaches the requirement of the length dimension of the forge piece, the stroke switch is touched, after the pressure maintaining time is set by the starting time relay, the upsetting tool automatically maintains the pressure to the set time and then unloads the upset tool.

Drawings

FIG. 1 is a schematic representation of a prior art upsetting die at the initial stage of upsetting;

figure 2 is a partial schematic view of the end of upset of the prior art;

FIG. 3 is a schematic view of a prior art pressure maintaining control device installed;

FIG. 4 is a three-dimensional schematic of FIG. 3;

FIG. 5 is a three-dimensional schematic view of a pressure holding control device;

FIG. 6 is a three-dimensional schematic view of another perspective of the hold pressure control device;

FIG. 7 is a view in the direction of P of FIG. 5;

FIG. 8 isbase:Sub>A sectional view A-A of FIG. 7;

fig. 9 is a sectional view taken along line B-B of fig. 7.

Detailed Description

The present invention is described in detail below with reference to the accompanying drawings: as shown in fig. 1 and 2, in the prior art, a connecting rod 2 is connected with an upsetting upper jacking tool 30 mounted on a slide block of a press, the lower end of the slide block is connected with an upper moving block 4, the upper moving block 4 is connected with upper left and right dies 8, the upper moving block 4 is embedded into a groove of a lower moving block 5, and the lower moving block is connected with the lower left and right dies; the upper middle die and the lower middle die are arranged in the horizontal middle of the die, and the upper middle die is connected with the upsetting upper jacking tool;

the slide block 30 of the press machine is pressed to move downwards to drive the central shaft 21 at the upper side of the connecting rod 2 to move downwards, the upper side of the connecting rod 2 rotates around the central shaft 23, the lower central shaft 23 of the connecting rod pushes the upper moving block 4 to drive the upper left and right dies 8 to move linearly towards the center, and the lower moving block 5 and the upper moving block 4 are in an active and passive motion relation, so that the lower moving block 5 is passively linked with the upper moving block 4 and drives the lower left and right dies 16 to move towards the center, and horizontal upsetting is realized; meanwhile, the upper middle die 14 and the lower middle die 15 are connected with the upsetting jacking tool, and are pressed downwards along with the slide block and the upsetting jacking tool in the downward pressing process of the slide block of the press machine. In the process, at the final stage of upsetting, when the left and right dies 8 are completely contacted with the upper middle die 14 and the lower middle die 15 of the crank throw, upsetting and forming of the forge piece 12 are finished;

fig. 3 isbase:Sub>A schematic view of the utility model, in which the inner end face of the lower moving block 5 is mounted on one side of the figure, the whole framework 18 of the utility model is installed, fig. 4 isbase:Sub>A three-dimensional schematic view of the installation position of the utility model, fig. 5 and 6 are schematic views of the whole three-dimensional different viewing angles of the utility model, fig. 7 isbase:Sub>A P-direction view of fig. 5, fig. 8 isbase:Sub>A sectional view frombase:Sub>A tobase:Sub>A of fig. 7, and fig. 9 isbase:Sub>A sectional view from B to B of fig. 7. The pressure maintaining control device 18 is internally provided with 2 pairs of diagonal guide posts 7 and guide sleeves 9, the guide posts 7 are arranged on the guide post bush 6 and are in a diagonal distribution structure, which is shown in figure 9. The other diagonal is provided with a reset spring 10 and a spring guide screw rod 11 which are respectively 2 pairs, and the movable seat plate 3 is connected with a base plate 17, the center of the base plate is provided with a double-stroke switch 13, the movable seat plate is provided with a stroke adjusting base 19, a stroke switch touch arm 20 which can be finely adjusted and a locking nut 21 are arranged on the stroke adjusting base, and the movable seat plate 3 is connected with a spacing adjusting screw rod 22 and a locking nut 1.

In this embodiment, the substrate 17 is mounted on the lower moving block of the upsetting tool, as shown in fig. 4, the distance adjusting screw 22 and the lock nut 1 are adjusted, so that when the upsetting of the left and right dies and the dies of the upper and lower intermediate dies is completed, the travel switch contact arm 20 just touches the travel switch 13, the travel switch is connected with the time relay, the automatic pressure maintaining operation is realized, the pressure maintaining time is automatically completed through the time setting relay, and the automatic pressure relief and unloading are performed after the upsetting is completed. After upsetting, the press slide block moves upwards to drive the upsetting tool, the upper middle die 14 and the like to move upwards in a follow-up manner, the lower workbench is removed, the lower tool and the forging stock are moved out of the press tool area, and after the forging stock 12 is taken out by a hoisting method, the left and right lower moving blocks 5 are opened for a certain distance so that the next forging stock 12 is upset and forged. After the left lower moving block 5 and the right lower moving block 5 are opened, the moving seat plate 3 pops up and returns under the action of a return spring 10 and a spring guide screw rod 11, as shown in fig. 9, the compression stroke is changed to 0, a stroke switch 13 swings and resets, different products are adjusted by replacing different length spacing adjusting screw rods 22 according to the width distance of a tool at the end of upsetting, and are locked by locking nuts 1.

Fig. 3 shows, after adopting the utility model discloses a device, the accessible is adjusted upper die 14, the width of lower die 15, make it with control the mould upsetting die realize contactless and form the clearance, control upsetting stroke and dwell time through the pressurize controlling means, can avoid controlling mould 8, 16 and middle mould 14, 15 contact when upsetting, press pressure direct action is on the forging stock, need not the mould contact and adjust the upsetting stroke, can show the upset forming force that reduces the effect on press and frock, reach energy saving and consumption reduction, effectively improve the life of press and upsetting frock simultaneously. The utility model discloses the device has the dust cover, adapts to abominable production environment.

Claims (3)

1. The utility model provides an upset crankshaft pressurize controlling means, including the upset forging that contains the connecting rod seat frock of pushing up, connecting rod, go up movable block, lower movable block, go up left and right mould, lower left and right mould, go up middle mould, lower middle mould, its characterized in that: the terminal surface sets up pressurize controlling means in one side of lower movable block, pressurize controlling means includes: a base plate and a movable base plate; the base plate is installed on the lower movable block, 2 groups of guide pillar guide sleeves are arranged at opposite angles between the base plate and the movable base plate, 2 groups of reset springs and spring guide screw rods are arranged at the other opposite angles, a double-stroke switch is arranged at the center of the base plate, a stroke adjusting base is installed on the movable base plate, a stroke switch touch arm and a locking nut which can be finely adjusted are arranged on the stroke adjusting base, and a distance adjusting screw rod and a locking nut are arranged between the base plate and the movable base plate.

2. The upsetting crankshaft dwell control device of claim 1, wherein: the pressure maintaining control device is provided with a shell cover plate, and the base plate and the movable seat plate are arranged at two ends of the shell cover plate.

3. The upset crankshaft dwell control apparatus of claim 1, wherein: the lower moving block is provided with a groove, the upper moving block is provided with a convex block, and the convex block is embedded into the groove of the lower moving block.

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