CN214133622U

CN214133622U - Take step powder metallurgy product to use plastic mould

Info

Publication number: CN214133622U
Application number: CN202023178718.XU
Authority: CN
Inventors: 朱杏根
Original assignee: Changshu Xunda Power Metallurgy Co ltd
Current assignee: Changshu Xunda Power Metallurgy Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-09-07
Anticipated expiration: 2030-12-25

Abstract

The utility model relates to a take step powder metallurgy plastic mould for product, including plug, well mould, upper punch and lower punch. The middle die is sleeved on the periphery of the core rod and comprises a die core and a die sleeve which is sleeved on the periphery of the die core and matched with the die core, the die sleeve comprises an upper die sleeve and a lower die sleeve which is matched with the upper die sleeve, a step part I is arranged on the upper portion of the upper die sleeve and is arranged on the upper portion of the die core and matched with the die core, a guide part is arranged on the step part I and extends into the die core, a step part II is arranged on the lower die sleeve and is arranged on the lower portion of the die core and matched with the die core; the upper punching piece is slidably sleeved on the periphery of the core rod and is positioned on the upper part of the middle die, and the upper punching piece has a movement stroke towards the middle die; the lower punch piece is slidably sleeved on the periphery of the core rod and is positioned at the lower part of the middle die, and the lower punch piece has a moving stroke towards the middle die. The problem that the step of the integrally formed mold core is easy to crack in the shaping process is solved by the arrangement of the specific structure.

Description

Take step powder metallurgy product to use plastic mould

Technical Field

The utility model relates to a powder metallurgy shaping technical field especially relates to a take step powder metallurgy plastic mould for product.

Background

The shaping process is a common process for improving the dimensional accuracy of the powder metallurgy part, the shaping equipment commonly used in China at present is in a punch structure, and the stress of a die is large during shaping. Particularly for powder metallurgy parts with steps, the stress on the steps is larger during shaping. The integrally formed mold core is easy to crack at the step in the shaping process, so that the production progress is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a take step for powder metallurgy product plastic mould has solved the easy problem that ftractures of integrated fashioned mold core in plastic in-process step department.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides a take step powder metallurgy shaping mould for product, it includes:

a core rod;

the middle die is sleeved on the periphery of the core rod and comprises a die core and a die sleeve which is sleeved on the periphery of the die core and matched with the die core, the die sleeve comprises an upper die sleeve and a lower die sleeve matched with the upper die sleeve, a step part I is arranged on the upper part of the upper die sleeve and is arranged on the upper part of the die core and matched with the die core, a guide part is arranged on the step part I and extends into the die core, a step part II is arranged on the lower die sleeve and is arranged on the lower part of the die core and matched with the die core;

the upper punching piece is slidably sleeved on the periphery of the core rod and is positioned on the upper part of the middle die, and the upper punching piece has a movement stroke towards the middle die;

the lower punching piece is slidably sleeved on the periphery of the core rod and is positioned on the lower part of the middle die, and the lower punching piece has a movement stroke towards the middle die.

Furthermore, the mold core comprises an upper mold core and a lower mold core matched with the upper mold core, the upper mold core and the lower mold core are annular, and the inner ring of the upper mold core is larger than the inner ring of the lower mold core.

Furthermore, the turning position of the inner ring of the upper mold core is provided with a right angle, and the turning position of the inner ring of the lower mold core is provided with a fillet.

Further, the step portion i is set to have a thickness, and the step portion ii is set to have a thickness.

Further, the upper die sleeve is detachably arranged on the lower die sleeve.

Further, the mold core is detachably disposed in the mold sleeve.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

1. the mold core is arranged in a way that the upper mold core is matched with the lower mold core, so that the cracking caused by the stress concentration at the joint of the upper mold core and the lower mold core in the integrated molding process is avoided.

2. Step portion I sets up the upper and lower both ends at well mould with step portion II, improves the atress degree of well mould, prevents that the too big production of mold core atress from moving.

3. The guide part extends into the die core, namely the thickness of the guide part is larger than that of the step of the upper die sleeve, so that the part is prevented from being damaged when being placed into the die.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic structural diagram of a shaping mold for a stepped powder metallurgy product according to the present invention;

FIG. 2 is a schematic structural view of the middle mold of FIG. 1;

fig. 3 is a schematic structural view of the mold core in fig. 2.

Wherein the reference numerals are as follows:

1. a core rod; 2. a middle mold; 21. a mold core; 211. an upper mold core; 2111. an inner ring I; 212. a lower mold core; 2121. an inner ring II; 22. die sleeve; 221. putting a die sleeve; 2211. a step part I; 2212. a guide portion; 222. a lower die sleeve; 2221. a step part II; 3. punching the workpiece; 4. and (4) punching the piece downwards.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, 2 and 3, the sizing die for a stepped powder metallurgy product includes a core rod 1, a middle die 2, an upper punch 3 and a lower punch 4.

The middle mold 2 is sleeved on the periphery of the core rod 1, and a distance is set between the interior of the middle mold 2 and the core rod 1 for placing a product. The middle mold 2 comprises a mold core 21 and a mold sleeve 22, and the mold core 21 comprises an upper mold core 211 and a lower mold core 212. The die case 22 includes an upper die case 221 and a lower die case 222. The mold sleeve 22 is wrapped around the mold core 21 for fixing the mold core 21. An inner ring I2111 is arranged on the upper mold core 211, and an inner ring II 2121 is arranged on the lower mold core 212. The upper mold core 211 is placed on the lower mold core 212, and the diameter of the inner ring I2111 is larger than that of the inner ring II 2121, so that a step shape matched with a product is formed. The two mold cores forming the ladder shape are separately arranged, so that the stress concentration at the turning part during the integral forming is avoided, and the mold cores are prevented from cracking. Meanwhile, the turning part of the lower mold core 212 is provided with a round angle, so that the lower mold core is prevented from being contacted with a product to generate damage.

As shown in fig. 2, the mold sleeve 22 is disposed on the periphery of the mold core 21, and the inner portion of the mold sleeve 22 is consistent with the outer dimension of the mold core 21, so as to cover and fix the mold core 21, thereby preventing the mold core 21 from cracking due to large stress. The die case 22 includes an upper die case 221 and a lower die case 222, and the upper die case 221 and the lower die case 222 are connected by bolts and detachably connected together. And meanwhile, the mold core is compatible with different mold cores 21, and the external size of the mold core 21 is ensured to be consistent with the internal size of the mold sleeve 22.

The upper portion of the upper die sleeve 221 is provided with a step portion I2211, the step portion I2211 is arranged on the upper portion of the upper die core 211, and meanwhile the diameter of an inner hole of the step portion I2211 is consistent with that of a product pushing hole of the upper die core 211. The thickness of step portion I2211 is 5mm at least for improve the atress degree of well mould, prevent that upper die core 211 atress too big produces the cluster and move. The upper die sleeve 221 is circumferentially provided with a guide portion 2212, the guide portion 2212 extends into the upper die core 211, namely, the depth of the guide portion 2212 is slightly deeper than the thickness of the step portion i 2211, and the guide portion is used for guiding a product when the product is placed in the die, so that the part is prevented from being damaged when the part is placed in the die.

The lower die sleeve 222 is provided with a step part II 2221 at the lower part, the step part II 2221 is arranged at the lower part of the lower die core 212, the inner diameter of the step part II 2221 is consistent with the diameter of a product placing hole of the lower die core 212, and the thickness of the step part II 2221 is at least 5mm, so that the stress degree of the middle die is improved, and the lower die core 212 is prevented from being moved due to overlarge stress.

The upper punching piece 3 is slidably sleeved on the periphery of the core rod 1 and is positioned at the upper part of the middle mold 2, and the upper punching piece 3 has a moving stroke towards the middle mold 2; the lower punch 4 is slidably sleeved on the periphery of the core rod 1 and is positioned at the lower part of the middle mold 2, and the lower punch 4 has a moving stroke towards the middle mold 2. The product sleeve is established on the plug 1 and falls into the mold core 21, and the upper punch 3 and the lower punch 4 act on simultaneously to extrude the product.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a take step powder metallurgy product with plastic mould which characterized in that, it includes:

a core rod (1);

a middle die (2), wherein the middle die (2) is sleeved on the periphery of the core rod (1), the middle mold (2) comprises a mold core (21) and a mold sleeve (22) which is sleeved on the periphery of the mold core (21) and is matched with the mold core (21), the die sleeve (22) comprises an upper die sleeve (221) and a lower die sleeve (222) matched with the upper die sleeve (221), the upper part of the upper die sleeve (221) is provided with a step part I (2211), the step part I (2211) is arranged at the upper part of the die core (21) and is matched with the die core (21), the step part I (2211) is provided with a guide part (2212), the guide part (2212) extends into the mold core (21), a step part II (2221) is arranged on the lower die sleeve (222), and the step part II (2221) is arranged at the lower part of the die core (21) and matched with the die core (21);

the upper punching piece (3) is slidably sleeved on the periphery of the core rod (1) and is positioned at the upper part of the middle die (2), and the upper punching piece (3) has a movement stroke towards the middle die (2);

the lower punching piece (4) is slidably sleeved on the periphery of the core rod (1) and is positioned on the lower portion of the middle die (2), and the lower punching piece (4) has a movement stroke towards the middle die (2).

2. The sizing die for the stepped powder metallurgy product according to claim 1, wherein the die core (21) comprises an upper die core (211) and a lower die core (212) matched with the upper die core (211), the upper die core (211) and the lower die core (212) are annular, and an inner ring I (2111) of the upper die core (211) is larger than an inner ring II (2121) of the lower die core (212).

3. The sizing die for the stepped powder metallurgy product according to claim 2, wherein a right angle is arranged at the turning position of the inner ring I (2111) of the upper die core (211), and a round angle is arranged at the turning position of the inner ring II (2121) of the lower die core (212).

4. The sizing die for a stepped powder metallurgy product according to claim 3, wherein the step portion I (2211) is set to have a thickness, and the step portion II (2221) is set to have a thickness.

5. The sizing die for stepped powder metallurgy products according to claim 4, wherein the upper die sleeve (221) is detachably provided on the lower die sleeve (222).

6. The sizing die for stepped powder metallurgy products according to claim 5, wherein the core (21) is detachably disposed in the die case (22).