CN215065889U - Device for simulating circulating load of push rod of die-casting die - Google Patents

Abstract

The utility model discloses a device for simulating the circulating load of a push rod of a die-casting die, which comprises an installation part and a loading part; a thrust plate of the mounting part is fixed on the base, a mounting plate is screwed in front of the thrust plate, a T-shaped hole with a small front part and a large rear part is penetrated through the mounting plate, the push rod penetrates through the T-shaped hole, the outer end head of the push rod is clamped on the step surface of the T-shaped hole, and a pressure sensor is arranged in the large-diameter part of the T-shaped hole; a first guide rod is fixed in front of the mounting plate, a guide sleeve is slidably matched on the first guide rod, the inner end of the push rod is slidably accommodated in a through hole of the guide sleeve, and a sealing cover is screwed in front of the guide sleeve; the loading part comprises a chassis, a fixed seat is arranged on the chassis, the fixed seat is matched with a swing frame in a sliding mode in the front-back direction, a circulating and reciprocating mechanism driven by a motor is arranged on the chassis, the circulating and reciprocating mechanism is connected with a front plate of the swing frame, and a rear plate of the swing frame is connected with a jacking head through a jacking rod. The device can detect the service life of the push rod under cyclic load.

Description

Device for simulating circulating load of push rod of die-casting die

Technical Field

The utility model relates to a die casting die technical field specifically says so a thereby it acquires the device of the circulation load number of times that the push rod can bear to the inner process of applying the load of relapseing manifold cycles of push rod to be used for simulating the actual die-casting in-process die cavity of die casting die.

Background

Conventional die casting die generally includes movable mould and cover half, and both closures constitute the die cavity, and the cover half is static and the movable mould is installed at the movable part of die casting machine, and is equipped with a plurality of via holes on the die cavity wall of movable mould, and sliding fit has a push rod in every via hole, and the inner of every push rod stretches into the die cavity behind the via hole that the wall of movable mould chamber corresponds, and the outer end of every push rod is fixed in the push pedal, the push pedal be connected with the driver part of die casting machine.

The working process of the die-casting die is as follows: die assembly and die casting are carried out, and the inner end of a push rod bears the die casting pressure of casting liquid in the cavity in the process; and then, the movable part of the die casting machine pulls open the movable die, the workpiece is initially bonded on the movable die and separated from the fixed die, then the driving part of the die casting machine can push the push plate and each push rod, and further the molded workpiece is ejected out from the cavity part of the movable die, so that the separation of the workpiece and the movable die is completed, and the demolding process of the workpiece is thoroughly realized.

The die casting die in the prior art has the following defects: in the die-casting process, the huge die-casting pressure in the die cavity can constitute great load to the push rod inner, and push rod itself is long and thin component again, after the compound die-casting process of relapse a lot of, the push rod is inevitable to appear buckling deformation because of reasons such as material performance, fatigue strength, continuous cycle load, and the aforesaid buckling deformation constantly accumulates the aggravation, makes the push rod scrape even the card die in the via hole with the via hole of the die cavity wall of movable mould when the die sinking easily. Once scraping or blocking occurs, the high-cost die can be damaged, even the die is scrapped, and great economic loss is caused; and the die card is dead back moreover, even if go up and repair through the technical staff at last and get rid of the dead trouble of card, nevertheless the maintenance process still can consume certain time, and in the mill, the die casting machine mould is only a ring of whole production line, in other words, in the half day or the day of waiting for die casting machine mould to overhaul, a whole production line of mill all can be paralyzed and stop the pendulum, like this, the loss that brings for the enterprise is great.

Therefore, in the mold industry, it is urgently needed to pre-judge the service life of the push rod to a certain extent so as to avoid scraping and even blocking of the push rod when the mold works, and the service life of the push rod is comprehensively influenced by factors such as the load size, the load application frequency, the load application mode and the like. The application focuses on the service life of the inner end of the push rod under the cyclic load, more specifically, the casting liquid in the cavity can apply the cyclic load to the inner end of the push rod repeatedly in the process of multiple times of die casting, and the application measures the degree that the push rod can be damaged and bent to scrape the through hole of the cavity wall after bearing the cyclic load for many times.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a can detect out the life of push rod under the circulation load to for actual production provides the data foundation, and then avoid the dead device that is used for simulating die casting die push rod circulation load of push rod scraping card even.

The technical scheme of the utility model is that a device for simulating the cycle load of the push rod of the die-casting die is provided, which comprises an installation part and a loading part;

the mounting part comprises a thrust plate and a base, the thrust plate is fixed on the base, a mounting plate is screwed in front of the thrust plate, a T-shaped hole with a small front part and a large rear part is penetrated through the mounting plate, the push rod penetrates through the T-shaped hole, the outer end head of the push rod is clamped on the step surface of the T-shaped hole, a pressure sensor is arranged in the large-diameter part of the T-shaped hole, and the pressure sensor is positioned between the outer end head of the push rod and the thrust plate; a first guide rod is fixed in front of the mounting plate, a guide sleeve used for simulating the cavity wall of the movable model is slidably matched on the first guide rod, through holes corresponding to the push rods one by one are penetrated through the guide sleeve, the inner ends of the push rods are slidably accommodated in the corresponding through holes, and a sealing cover used for blocking a front opening of the through holes is screwed in front of the guide sleeve; the outer edge of the sealing cover is provided with a rear flange plate;

the loading part comprises a chassis, a fixed seat is arranged on the chassis, a swing frame is arranged on the fixed seat in a sliding fit manner along the front and back directions, a circulating and reciprocating mechanism driven by a motor is arranged on the chassis, the circulating and reciprocating mechanism is connected with a front plate of the swing frame, a rear plate of the swing frame is connected with a top through a top rod, a front flange plate is arranged on the top, and the front flange plate is in threaded connection with a rear flange plate.

Compared with the prior art, the device for simulating the cycle load of the push rod of the die-casting die has the following advantages.

The working process of the device is analyzed.

Each push rod penetrates through the T-shaped hole of the mounting plate forwards, the outer end head of each push rod clamps the step surface of the T-shaped hole, the mounting plate is fixed in front of the thrust plate in a threaded mode, and each pressure sensor is placed into the large-diameter portion of the corresponding T-shaped hole synchronously; then the sealing cover is screwed at the front end of the guide sleeve, the first guide hole of the guide sleeve is sleeved backwards on the first guide rod, and the through hole of the guide sleeve is sleeved on the corresponding push rod; the assembly of each push rod and the mounting part is completed at the moment; and then the front flange plate of the top of the loading part is in threaded connection with the rear flange plate of the sealing cover, so that the preparation work before measurement is finished.

During measurement, the motor is started to drive the circulating reciprocating mechanism, the ejector rod and the ejector head are driven by the swing frame to do periodic circulating reciprocating motion along the front-back direction, so that a sealing cover applies periodic circulating load to each push rod sleeved by the guide sleeve, and the outer end head of each push rod is used for periodically abutting against the pressure sensor on the thrust plate; the pressure sensor records the instantaneous load value borne by the inner end of the push rod in each cycle of reciprocating in the form of pressure value reading. The guide sleeve has the advantages that the guide sleeve has the effect that if the guide sleeve is not arranged in the loading process, the slender push rod can be quickly bent and damaged by a large margin due to stress, the guide sleeve is sleeved on the push rod to protect the push rod, the deformation degree and the speed of the push rod are limited, and therefore the condition that the push rod is sleeved in a through hole in the wall of the movable model cavity and the inner end of the push rod is subjected to die-casting pressure in the cavity in the die-casting process is truly simulated, and the detection result is enabled to be closer to the real working condition.

The simulation process of applying the cyclic load to the push rod is that an instantaneous pressure value acquired by the pressure sensor is a y value, time is an x value, a curve of the pressure value and the time is made, and the curve can be observed to be obviously wavy, namely, the curve is attenuated to zero from zero to a peak along with each forward and backward swing of the cyclic reciprocating mechanism, namely, the peak is generated once the swing frame, the top and the like advance and retreat, technicians can regulate and control the output torque of the motor, so that the pressure value of the peak is equal to the die-casting pressure of the die cavity casting liquid to the end part of the push rod in the actual die-casting process, and the process of applying the cyclic load to the push rod is successfully simulated. Under the normal condition, every crest corresponding value is actual die-casting pressure, but after the repeated many times load, if after 15000 times, the push rod is tired impaired, takes place buckling deformation, and the scraping has taken place with the via hole pore wall of uide bushing, and the crest value that corresponds can increase suddenly, so when gathering the crest value and obviously being greater than the normal value, just can accurately judge the impaired scraping of push rod, this number of times is exactly the life of push rod under cyclic load.

Because the device can accurately acquire the life of push rod under cyclic load, the event can provide data reference and warning for the actual work, lets the reasonable compound die-casting number of times that sets up of mould enterprise, in time changes and discards tired push rod. If bending scraping is detected to occur to the push rod after 15000 times of die casting, the push rod is replaced at about 12000 times, so that expensive dies are prevented from being damaged by scraping, and the delay and paralysis of the whole production line caused by die blocking are naturally avoided; the time of maintainer maintenance has been saved, has reduced the cost of labor, has obviously reduced the loss of enterprise.

The circular reciprocating mechanism preferably comprises a motor, a swing rod, a connecting rod and a mounting seat fixed on a chassis, wherein a motor shell is fixed on the mounting seat, an output shaft of the motor is transverse, a turntable is fixed on the output shaft, and a transmission pin is fixed on the turntable; the lower end of the swing rod is hinged with the mounting seat, a waist-shaped hole is formed in the middle section of the swing rod, a transmission pin is in sliding fit in the waist-shaped hole, and the upper end of the swing rod is hinged with the front end of the connecting rod; the front plate of the swing frame is provided with an ear plate, and the rear end of the connecting rod is hinged with the ear plate; the structure has simple assembly and stable and reliable reciprocating motion operation; and the formed reciprocating force can be locked in the horizontal direction, and the horizontal load is supported by each horizontal push rod to the maximum extent.

Preferably, the base and the chassis are both arranged on the table top, an upper jacking driving cylinder for lifting the base is arranged on the table top, and a buffer spring is arranged between the base and the table top; the height of installation department can be adjusted in a flexible way to this structure, ensures that closing cap and uide bushing are just to the top, further ensures loaded stability and precision.

Drawings

Fig. 1 is a schematic structural diagram of the device for simulating the cyclic load of the push rod of the die-casting die.

Fig. 2 is a schematic view of the structure of fig. 1 after being deflected by a certain angle.

Fig. 3 is a half sectional structure schematic diagram of the device for simulating the push rod circulation load of the die casting mold of the present invention.

Fig. 4 is a schematic view of a local explosion structure at the joint of the guide sleeve and the sealing cover of the device for simulating the cyclic load of the push rod of the die-casting die of the utility model.

Shown in the figure are 1, a thrust plate, 2, a base, 3, a mounting plate, 4, a T-shaped hole, 5, a push rod, 5.1, an outer end head, 6, a pressure sensor, 7, a first guide rod, 8, a guide sleeve, 9, a through hole, 10, a sealing cover, 11, a rear flange plate, 12, a chassis, 13, a fixed seat, 14, a swing frame, 14.1, a front plate, 14.2, a rear plate, 14.3, a second guide rod, 15, a motor, 16, a mandril, 17, a top head, 18, a front flange plate, 19, a swing rod, 20, a connecting rod, 21, a mounting seat, 22, a rotary disk, 23, a transmission pin, 24, a table board, 25, an upper jacking driving cylinder, 26, a buffer spring, 27, a first guide hole, 28, a front screw hole, 29, a rear screw hole, 30, an ear plate, 31 and a second guide hole.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

As shown in fig. 1-4, the utility model discloses a device for simulating die casting die push rod circulation load, it includes installation department, loading portion and mesa 24.

The mounting part comprises a thrust plate 1 and a base 2, the base 2 is mounted on a table board 24, specifically, an upper jacking driving cylinder 25 for lifting the base 2 is arranged on the table board 24, and a buffer spring 26 is arranged between the base 2 and the table board 24.

The thrust plate 1 is fixed on the base 2, the mounting plate 3 is screwed in front of the thrust plate 1, four T-shaped holes 4 with small front parts and large rear parts are penetrated through the mounting plate 3, 4 push rods 5 are arranged in the embodiment, each push rod 5 penetrates through the corresponding T-shaped hole 4, and the outer end 5.1 of each push rod 5 is clamped on the step surface of the T-shaped hole 4. A pressure sensor 6 is arranged in the large diameter part of each T-shaped hole 4, and the pressure sensor 6 is positioned between the outer end head 5.1 of the push rod 5 and the thrust plate 1. The preceding first guide bar 7 that is fixed with of mounting panel 3, more specifically say, first guide bar 7 is 4, and 3 four corners of mounting panel are equipped with four through-holes, and every first guide bar 7 passes behind the through-hole that mounting panel 3 corresponds and is fixed with thrust plate 1. Four first guide rods 7 are slidably matched with guide sleeves 8 used for simulating the cavity wall of a movable die of the die-casting die, four first guide holes 27 penetrate through four corners of each guide sleeve 8, and the four first guide holes 27 are respectively in sliding fit with the four first guide rods 7. The guide sleeve 8 is also provided with four through holes 9 corresponding to the four push rods 5 one by one, and the inner ends of the push rods 5 are accommodated in the corresponding through holes 9 in a sliding manner. A sealing cover 10 for blocking the front opening of the through hole 9 is screwed in front of the guide sleeve 8; the sealing cover 10 is provided with a front screw hole 28, the front surface of the guide sleeve 8 is provided with a rear screw hole 29, and the sealing cover 10 and the guide sleeve 8 are connected through a bolt penetrating through the front screw hole 28 and the rear screw hole 29. The outer edge of the sealing cover 10 is provided with a rear flange 11.

The loading section includes a chassis 12, the chassis 12 also being mounted on a table top 24. The chassis 12 is provided with a fixed seat 13, the fixed seat 13 is provided with a swing frame 14 along the front-back sliding fit, specifically, the swing frame 14 comprises a front plate 14.1, a rear plate 14.2 and four second guide rods 14.3 connecting the two plates, the fixed seat 13 is also correspondingly provided with four second guide holes 31, and each second guide rod 14.3 penetrates through the corresponding second guide hole 31 in a sliding manner.

The chassis 12 is provided with a circulating reciprocating mechanism driven by a motor 15, and the circulating reciprocating mechanism is connected with a front plate 14.1 of the swing frame 14. Specifically, the circulating reciprocating mechanism comprises a motor 15, a swing rod 19, a connecting rod 20 and a mounting seat 21 fixed on the chassis 12, wherein a shell of the motor 15 is fixed on the mounting seat 21, an output shaft of the motor 15 is transverse, a rotating disc 22 is fixed on the output shaft, and a transmission pin 23 is fixed on the rotating disc 22; the lower end of the swing rod 19 is hinged with the mounting seat 21, a kidney-shaped hole 19.1 is formed in the middle section of the swing rod 19, a transmission pin 23 is in sliding fit in the kidney-shaped hole 19.1, and the upper end of the swing rod 19 is hinged with the front end of the connecting rod 20; the front plate 14.1 of the swing frame 14 is provided with an ear plate 30, and the rear end of the connecting rod 20 is hinged with the ear plate 30.

The back plate 14.2 of the swing frame 14 is connected with a top head 17 through a top rod 16, a front flange 18 is arranged on the top head 17, and the front flange 18 is in threaded connection with the back flange 11.

Claims (3)

1. The utility model provides a device for simulating die casting die push rod circulation load which characterized in that: the device comprises a mounting part and a loading part;

the mounting part comprises a thrust plate (1) and a base (2), the thrust plate (1) is fixed on the base (2), the front of the thrust plate (1) is in threaded connection with a mounting plate (3), a T-shaped hole (4) with a small front part and a large rear part is penetrated through the mounting plate (3), a push rod (5) penetrates through the T-shaped hole (4), an outer end head (5.1) of the push rod (5) is clamped on the step surface of the T-shaped hole (4), a pressure sensor (6) is arranged in a large-diameter part of the T-shaped hole (4), and the pressure sensor (6) is located between the outer end head (5.1) of the push rod (5) and the thrust plate (1); a first guide rod (7) is fixed in front of the mounting plate (3), a guide sleeve (8) used for simulating the cavity wall of the moving model is slidably matched on the first guide rod (7), through holes (9) corresponding to the push rods (5) are arranged in the guide sleeve (8) in a penetrating way, the inner ends of the push rods (5) are slidably accommodated in the corresponding holes (9), and a sealing cover (10) used for blocking the front opening of the holes (9) is screwed in front of the guide sleeve (8); the outer edge of the sealing cover (10) is provided with a rear flange plate (11);

the loading part comprises a chassis (12), a fixed seat (13) is arranged on the chassis (12), a swing frame (14) is arranged on the fixed seat (13) in a front-back sliding fit mode, a circulating reciprocating mechanism driven by a motor (15) is arranged on the chassis (12), the circulating reciprocating mechanism is connected with a front plate (14.1) of the swing frame (14), a rear plate (14.2) of the swing frame (14) is connected with a top head (17) through a top rod (16), a front flange plate (18) is arranged on the top head (17), and the front flange plate (18) is in threaded connection with the rear flange plate (11).

2. The apparatus for simulating a cyclic load of a push rod of a die casting mold as claimed in claim 1, wherein: the circulating reciprocating mechanism comprises a motor (15), a swing rod (19), a connecting rod (20) and a mounting seat (21) fixed on the chassis (12), wherein a shell of the motor (15) is fixed on the mounting seat (21), an output shaft of the motor (15) is transverse, a rotating disc (22) is fixed on the output shaft, and a transmission pin (23) is fixed on the rotating disc (22); the lower end of the swing rod (19) is hinged with the mounting seat (21), a waist-shaped hole (19.1) is formed in the middle section of the swing rod (19), a transmission pin (23) is in sliding fit in the waist-shaped hole (19.1), and the upper end of the swing rod (19) is hinged with the front end of the connecting rod (20); the front plate (14.1) of the swing frame (14) is provided with an ear plate (30), and the rear end of the connecting rod (20) is hinged with the ear plate (30).

3. The apparatus for simulating a cyclic load of a push rod of a die casting mold as claimed in claim 1, wherein: the base (2) and the chassis (12) are both arranged on a table board (24), an upper jacking driving cylinder (25) used for lifting the base (2) is arranged on the table board (24), and a buffer spring (26) is arranged between the base (2) and the table board (24).

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