CN214321658U

CN214321658U - High-load punch with built-in cooling structure

Info

Publication number: CN214321658U
Application number: CN202022488369.5U
Authority: CN
Inventors: 张宇晖
Original assignee: TAICANG JIUXIN PRECISION MOLD CO Ltd
Current assignee: TAICANG JIUXIN PRECISION MOLD CO Ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-10-01
Anticipated expiration: 2030-11-02

Abstract

The utility model discloses a high load drift of built-in cooling structure, it includes: the pressure-bearing block is installed at the drift of pressure-bearing block below, and the cover is established at the last mould bucket in the pressure-bearing block outside, lies in the drift cover that pressure-bearing block below and external diameter and last mould bucket internal diameter offset, and the cover is established in the drift outside and is overlapped the discharge ring that offsets with the lower surface of drift cover, the axle center position of drift be equipped with the step hole, install the one end of the water-cooled tube in the step hole and fix on the pressure-bearing block, the other end of water-cooled tube offsets with the tip in step hole, the water-cooled tube be close to the position of step hole tip and be equipped with the through-hole, this drift is used for improving the situation of use of hot temperature forging drift under high-load high temperature occasion, realizes the steady heat dissipation of drift, improves the production beat, extension drift life-span, economic and reliable, green easily controls, and it is convenient to maintain.

Description

High-load punch with built-in cooling structure

Technical Field

The invention relates to the field of warm forging, in particular to a high-load punch with a built-in cooling structure.

Background

The punch is also called a male die, an upper die, a male die, a punching needle and the like, and the punch is a metal part arranged on a punching die and is applied to direct contact with a material to deform the material and cut the material.

At present, the warm forging punch in the industry is cooled mostly by means of an external spraying device, normal flow water cooling and alternate use of a plurality of punches. The external spraying device is easy to install, has a good effect on the cooling effect of the surface of the punch, is convenient to observe visually, and can only be suitable for the conditions of low frequency and short stroke. In high frequency situations, once the cooling effect is not good enough, the heat generated in forging can not be transferred sufficiently, the strength of the punch can be greatly reduced by the accumulated heat, and the excessive temperature of the punch is not beneficial to coating the lubricant. The service life of the punch is greatly influenced, the demoulding is difficult in severe cases, and the service life of the press is even reduced.

When the forming area of drift is longer, fixed spraying point probably can't cover all positions, consequently need set up mobilizable cooling spray set, in order to ensure the cooling effect, need control moving speed, when the cooling effect is unsatisfactory, can only adopt the extension to spray time or increase the measure that sprays the volume, this must lead to occupying a large amount of takts, extravagant serious, inefficiency, and very big extravagant drift life-span.

Constant flow water cooling typically adjusts the proportion of water high and it is desirable to remove heat by the large volume of flowing water, which is actually difficult to effectively cool a punch that has been heated to reddish colors, based on the leidenfrost effect (the phenomenon that liquid does not wet hot surfaces but merely forms a vapor layer thereon, as found by leidenfrost of scientists in 1756), which is only effective if the punch temperature is below the boiling point of the spray liquid. The multiple punches are used alternately, so that the production rhythm is not influenced, the actual heating condition of the punches is not improved, and the service life of the punches is influenced by frequent cold and hot alternation.

Disclosure of Invention

The purpose of the invention is as follows: in order to solve the defects of the prior art, the invention provides the high-load punch with the built-in cooling structure, which is used for improving the use condition of the hot-forging punch in a high-load high-temperature occasion, realizing the stable heat dissipation of the punch, improving the production takt, prolonging the service life of the punch, and is economic, reliable, green, environment-friendly, easy to control and convenient to maintain.

The technical scheme is as follows: in order to achieve the above object, the present invention provides a high load punch with a built-in cooling structure, comprising: the punch comprises a bearing block, a punch head, an upper die barrel, a punch head sleeve and a discharging ring, wherein the punch head is arranged below the bearing block, the upper die barrel is sleeved on the outer side of the bearing block, the punch head sleeve is positioned below the bearing block, the outer diameter of the punch head sleeve is abutted against the inner diameter of the upper die barrel, the discharging ring is sleeved on the outer side of the punch head and is abutted against the lower surface of the punch head sleeve, a step hole is formed in the axis position of the punch head, one end of a water-cooling pipe arranged in the step hole is fixed on the bearing block, the other end of the water-cooling pipe is abutted against the end part of the step hole, and a through hole is formed in the position, close to the end part of the step hole, of the water-cooling pipe;

as the utility model discloses a further preferred, the surface of water-cooled tube the pressure piece that sets firmly offset with the spring of the transition part installation in the maximum aperture in step hole and minimum aperture, water-cooled tube link to each other with the water inlet on last mould bucket, the step hole links to each other with the delivery port.

As a further preferred aspect of the present invention, the gap between the pressure block and the pressure-bearing block and the middle between the pressure block and the spring are both provided with a sealing ring.

As the utility model discloses a further preferred, the junction of bearing block and water-cooled tube be equipped with 15 ~ 20 tapering, play the guide effect when assembling the water-cooled tube, the water-cooled tube can be along the conical surface self-centering promptly, gets into the mating holes, accomplishes the high-speed joint with the water inlet.

As a further preference of the utility model, the surface of the pressure-bearing block be equipped with the sealing washer a that is used for keeping apart water inlet and delivery port, prevent interfering mutually of water inlet and delivery port.

As the further optimization of the utility model, the total length of the water cooling pipe is 1mm-2mm shorter than the step hole.

As the utility model discloses a further preferred, the water inlet links to each other with the cold machine by force, and inside the cold quick-witted coolant of machine by force, the drift is squeezed into after the medium after the cooling passes through the cold machine by force, and the delivery port links to each other with the cistern, realizes cyclic utilization.

As the utility model discloses a further preferred, the minimum aperture cross sectional dimension in step hole accounts for 5% ~ 8% of drift cross sectional dimension, through the aperture size who prescribes a limit to the step hole, has guaranteed the stability and the reliability of drift work.

As the utility model discloses a further preferred, terminal surface and the punch terminal surface in step hole minimum aperture between the distance be 50mm at least, through setting up the size between step hole and the punch tip, guaranteed that the drift realizes its inside cooling under the state of normal work, guaranteed the stability and the reliability of drift work, guarantee the life of drift simultaneously.

As the utility model discloses a further preferred, the drift cover is clearance fit with the drift, avoids the restraint of transition.

As the utility model discloses a further preferred, the drift below is equipped with the die, unloads the material ring and is clearance fit with lower die, drift, plays the effect of leading positive drift, guarantees product concentricity.

Has the advantages that: compared with the prior art, the high-load punch with the built-in cooling structure has the following advantages that:

1. a new observation way and a new control point are provided, the heating condition of the punch can be known in real time by detecting the temperature of the cooling medium at the water outlet, and the temperature of the matrix of the punch can be adjusted in real time by adjusting the flow of the cooling medium and the power of the forced cooling machine, so that the method has the characteristics of quick effect taking and convenient operation;

2. by adjusting the cooling efficiency, the stable heat dissipation of the punch can be conveniently realized, the insufficient external heat dissipation is avoided, and the accumulated core heat is taken away; the transitional heat dissipation is avoided, the heated curve of the punch is kept stable, and the early failure of the punch caused by the sudden drop of the surface temperature is avoided;

3. through uninterrupted heat dissipation, the invalid time of external spraying is greatly reduced, and the production efficiency is greatly improved;

4. through supplementary external spraying, share the cooling task that external spraying, put the even coating of emollient with the focus that external spraying and apply, avoid invalid constant current water cooling method, practice thrift emollient, with abundant atomizing mode, even effectual coating is on the mould surface, and each takes the duties of the official post, accomplishes lubricated and cooling task jointly. The forging environment is beautified by matching with a mist collecting device;

5. the cooling medium is prepared by clear water and an antirust agent, and is recycled, so that the loss is less, and the cooling agent is green and economic;

6. and by adopting the flexible sealing device, the leakage of cooling medium caused by various gaps generated by elastic deformation in the forging process is avoided.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a schematic view of the working state of the present invention;

FIG. 3 is a partial enlarged view of the junction of the water cooling tube and the pressure block;

FIG. 4 is a partially enlarged view of the location of the water cooling tubes near the ends of the stepped holes.

Detailed Description

The invention is further elucidated with reference to the drawings and the embodiments.

As shown in fig. 1, the high load punch with a built-in cooling structure according to the present invention comprises: the device comprises a bearing block 1, a sealing ring A2, an upper die barrel 3, a pressing ring 4, a punch sleeve 5, a discharging ring 6, a punch 7, a water-cooling pipe 8, a step hole 81, a through hole 81, a sealing ring 10, a pressure block 11, a spring 13, a water inlet 83, a water outlet 84, a forced cooling machine and a water outlet connecting reservoir.

As shown in fig. 2, a punch 7 is arranged below a bearing block 1, an upper die barrel 3 is sleeved on the outer side of the bearing block 1, a punch sleeve 5 is positioned below the bearing block 1, the outer diameter of the punch sleeve 5 is abutted against the inner diameter of the upper die barrel 3, a discharge ring 6 is sleeved on the outer side of the punch 7 and abutted against the lower surface of the punch sleeve 5, a step hole 81 is arranged at the axis position of the punch 7, one end of a water-cooling pipe 8 arranged in the step hole 81 is fixed on the bearing block 1, the other end of the water-cooling pipe 8 is abutted against the end of the step hole 81, and a through hole 82 is arranged at the position of the water-cooling pipe 8 close to the end of the step hole 81;

as shown in FIG. 3, a pressure block 11 fixed on the outer surface of the water-cooled tube 8 is pressed against a spring 13 installed at the transition part of the maximum aperture and the minimum aperture of the stepped hole 81, the water-cooled tube 8 is connected with a water inlet 83 on the upper mold barrel 3, and the stepped hole 81 is connected with a water outlet 84.

Examples

After the whole structure is installed, the spring 13 is ensured to be in a compressed state all the time, thrust is exerted on the pressure block 11 all the time, the sealing ring 10 is promoted to deform, the sealing ring is completely attached to the conical surface of the opening part of the pressure bearing block 1, and the cooling medium is prevented from leaking. At the return moment of the punch press, the punch 7 bears the drawing force to form a gap with the pressure-bearing block 1, and at the moment, the spring 13 with the pre-pressing can also continuously apply thrust to the pressure block 11 to promote the deformation of the sealing ring 10 and prevent the cooling medium from leaking.

At this time, water in the reservoir enters the water cooling tube 8 through the forced cooling machine through the water inlet 83, the punch 7 in the working state is cooled under the action of a cooling medium in the water cooling tube 8, the cooling medium in the water cooling tube 8 enters the water cooling tube 8 from the water inlet 83, flows through the position where the water cooling tube 8 abuts against the end of the stepped hole 81 under the action of the forced cooling machine and flows out of the through hole 82 to fill the whole stepped hole 81, as shown in fig. 4, and finally, the cooling water in the stepped hole 81 is discharged from the water outlet 84 and enters the reservoir, so that the cyclic utilization is realized.

Claims

1. A high load punch with built-in cooling structure, comprising: pressure-bearing block (1), install drift (7) in pressure-bearing block (1) below, establish last moulding barrel (3) in the pressure-bearing block (1) outside at the cover, be located pressure-bearing block (1) below and external diameter and last moulding barrel (3) internal diameter offset drift cover (5), establish in drift (7) outside and with the lower surface of drift cover (5) offset discharge ring (6), its characterized in that: a step hole (81) is formed in the axis position of the punch (7), one end of a water-cooling pipe (8) installed in the step hole (81) is fixed on the pressure-bearing block (1), the other end of the water-cooling pipe (8) is abutted against the end part of the step hole (81), and a through hole (82) is formed in the position, close to the end part of the step hole (81), of the water-cooling pipe (8);

the outer surface of the water-cooling pipe (8) is fixedly provided with a pressure block (11) which is abutted against a spring (13) arranged at a transition part of the maximum aperture and the minimum aperture of the stepped hole (81), the water-cooling pipe (8) is connected with a water inlet (83) on the upper die barrel (3), and the stepped hole (81) is connected with a water outlet (84).

2. A high-load punch with a built-in cooling structure according to claim 1, wherein: and sealing rings (10) are arranged in the gaps between the pressure block (11) and the pressure bearing block (1) and the middles of the pressure block (11) and the spring (13).

3. A high-load punch with a built-in cooling structure according to claim 1, wherein: the joint of the pressure bearing block (1) and the water cooling pipe (8) is provided with a taper of 15-20 degrees.

4. A high-load punch with a built-in cooling structure according to claim 1, wherein: the outer surface of the pressure bearing block (1) is provided with a sealing ring A (2) used for isolating a water inlet (83) and a water outlet (84).

5. A high-load punch with a built-in cooling structure according to claim 1, wherein: the total length of the water-cooling pipe (8) is 1-2 mm shorter than the step hole (81).

6. A high-load punch with a built-in cooling structure according to claim 1, wherein: the water inlet (83) is connected with the forced cooling machine, and the water outlet (84) is connected with the water storage tank.

7. A high-load punch with a built-in cooling structure according to claim 1, wherein: the minimum aperture cross section size of the stepped hole (81) accounts for 5% -8% of the cross section size of the punch (7).

8. A high-load punch with a built-in cooling structure according to claim 1, wherein: the distance between the end face of the minimum bore diameter of the stepped hole (81) and the end face of the punch (7) is at least 50 mm.

9. A high-load punch with a built-in cooling structure according to claim 1, wherein: the punch sleeve (5) is in clearance fit with the punch (7).

10. A high-load punch with a built-in cooling structure according to claim 1, wherein: the device is characterized in that a concave die (9) is arranged below the punch (7), and the discharging ring (6) is in clearance fit with the lower concave die (9) and the punch (7).