CN219074320U

CN219074320U - Punch structure of high-pressure casting belt punch ring

Info

Publication number: CN219074320U
Application number: CN202320004452.1U
Authority: CN
Inventors: 吴锶; 郑雷; 顾波; 马建国; 谢本阁
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2023-01-03
Filing date: 2023-01-03
Publication date: 2023-05-26
Anticipated expiration: 2033-01-03

Abstract

The utility model discloses a punch structure of a high-pressure casting belt punch ring, which comprises a punch body, a first punch ring and a second punch ring, wherein the punch body is provided with a first punch ring and a second punch ring; a first annular mounting groove is formed in the inner side of the first punch ring, a protrusion is arranged on the punch body, and the protrusion is in clearance fit with the first annular mounting groove; the punch body is provided with a second annular mounting groove, and the second punch ring is mounted in the second annular mounting groove; the center of the punch body is provided with a threaded hole used for being connected with the injection rod. The utility model can prolong the service life of the punch and reduce the use cost.

Description

Punch structure of high-pressure casting belt punch ring

Technical Field

The utility model belongs to the technical field of high-pressure casting punches, and particularly relates to a punch structure of a high-pressure casting belt punch ring.

Background

The high-pressure die casting of aluminum alloy is a casting forming method which is to pour molten or semi-molten metal into a die-casting machine pressing chamber, then press the metal in the pressing chamber into a die cavity at a high speed by a punch, and enable the molten metal to be quickly solidified and formed under the action of high-pressure. The high-pressure casting has the characteristics of short molding beat time and high production efficiency, wherein the front end surface of the punch part is directly contacted with molten metal, the outer circular surface is in clearance fit with the inner wall of the pressing chamber and reciprocates at high frequency, and the side edge needs to have certain wear resistance. The traditional integral ductile iron punch is poor in wear resistance and fatigue strength, so that the punch is worn very quickly, the punch needs to be replaced for 2000-4000 times generally, the service life is short, and the comprehensive use cost is high due to frequent replacement.

Therefore, there is a need to develop a new high pressure casting punch structure with a punch ring.

Disclosure of Invention

The utility model aims to provide a punch structure of a high-pressure casting belt punch ring, which can prolong the service life and reduce the cost.

The utility model relates to a punch structure with a punch ring for high-pressure casting, which comprises a punch body, a first punch ring and a second punch ring, wherein the punch body is provided with a first punch ring and a second punch ring; a first annular mounting groove is formed in the inner side of the first punch ring, a protrusion is arranged on the punch body, and the protrusion is in clearance fit with the first annular mounting groove; the punch body is provided with a second annular mounting groove, and the second punch ring is mounted in the second annular mounting groove; the center of the punch body is provided with a threaded hole used for being connected with the injection rod.

Optionally, the first punch ring and the second punch ring have an outer diameter greater than an outer diameter of the punch body.

Optionally, a first Z-shaped expansion joint perpendicular to the end face of the ring and with the width of a is formed on the first punch ring; the second punch ring is provided with a second Z-shaped expansion joint perpendicular to the end face of the ring and with the width of a.

Optionally, the difference between the perimeter of the first annular mounting groove minus the perimeter of the first Z-shaped expansion joint is greater than the perimeter of the boss to prevent the first punch ring from failing to fully conform to the punch body.

Optionally, the length of the second punch ring is less than the length of the second annular mounting groove on the punch body; the second punch ring is in clearance fit with the second annular mounting groove.

Optionally, the front end of the first punch ring is not provided with a chamfer, and the tail part of the first punch ring is provided with a C1-C2 chamfer so as to facilitate the retraction of the punch.

Optionally, the first Z-shaped expansion joint of the first punch ring faces upwards.

Optionally, when the first punch ring and the second punch ring are used simultaneously, the first Z-shaped expansion joint and the second Z-shaped expansion joint are not located on the same straight line.

Optionally, the first punch ring and the second punch ring are made of steel or beryllium bronze.

Optionally, the tail of the punch body has a flat surface for ease of installation.

The utility model has the following advantages:

(1) The utility model reduces the failure rate and improves the installation efficiency;

(2) Compared with the existing front end limiting belt ring punch structure, the novel front end limiting belt ring punch is convenient to install, and the integral pulling-out of the punch ring caused by insufficient strength of the limiting structure when the punch is pulled back in the use process is avoided.

(3) The service life of the punch body is prolonged by about 3-4 times compared with that of a punch with an integral structure, and the cost is saved by about 2 times.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is an enlarged view of the mounting structure K of the first punch ring of FIG. 2;

fig. 4 is an enlarged schematic diagram of a punch ring expansion joint structure and a dimension a label;

in the figure: 1. the punch comprises a first punch ring, 11, a first annular mounting groove, 12, a chamfer, 13, a first Z-shaped expansion joint, 2, a second punch ring, 21, a second Z-shaped expansion joint, 3, a punch body, 31, a bulge, 32, a second annular mounting groove, 33, a plane, 34 and a threaded hole.

Detailed Description

The present utility model will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 4, in the present embodiment, a punch structure for high-pressure casting a punch ring includes a punch body 3, a first punch ring 1, and a second punch ring 2. The first annular mounting groove 11 is formed in the inner side of the first punch ring 1, the punch body 3 is provided with a protrusion 31, and the protrusion 31 is in clearance fit with the first annular mounting groove 11. The punch body 3 is provided with a second annular mounting groove 32, and the second punch ring 2 is mounted in the second annular mounting groove 32. The center of the punch body 3 has a screw hole 34 for connection with a shot rod. The tail of the punch body 3 has a flat surface 33 for easy installation.

In this embodiment, the outer diameters of the first punch ring 1 and the second punch ring 2 are slightly larger than the outer diameter of the punch body 3, so that the diameter of the punch ring (including the first punch ring 1 and the second punch ring 2) after compression in the pressing chamber is larger than the outer diameter of the punch body 3, the outer side wall of the punch body 3 is not in direct contact with the inner wall of the pressing chamber, and abrasion of the punch body 3 is reduced.

In this embodiment, as shown in fig. 2 and fig. 4, a first Z-shaped expansion joint 13 perpendicular to the end face of the ring and having a width a is formed on the first punch ring 1. The second punch ring 2 is provided with a second Z-shaped expansion joint 21 perpendicular to the end face of the ring and with a width a. The dimension a is the outer circumference of the punch ring (comprising the first punch ring 1 and the second punch ring 2) minus the outer circumference of the punch body 3, and can be generally manufactured according to the difference of 3-6mm, and the length of 0.2-0.5 can be additionally increased to increase the width of the seam, so that the seam is prevented from being too narrow, the diameter of the punch ring in the pressing chamber is too large to be assembled, and after the punch ring is assembled in the pressing chamber, the expansion joint (comprising the first Z-shaped expansion joint 13 and the second Z-shaped expansion joint 21) forms a gap of 0.2-1mm after being compressed.

In this embodiment, the difference between the circumference of the first annular mounting groove 11 minus the circumference of the first Z-shaped expansion joint 13 is larger than the circumference of the protrusion 31, so as to prevent the first punch ring 1 from being unable to completely fit the punch body 3.

In this embodiment, the length of the second punch ring 2 is smaller than the length of the second annular mounting groove 32 on the punch body 3, so that the second punch ring 2 and the second annular mounting groove 32 are in clearance fit.

When the punch ring is worn and torn continuously in the use process, the aluminum material can be accumulated at the expansion joint, and under the continuous accumulation effect, the punch ring can be propped open in the accumulation process of the aluminum material, so that the outer wall of the punch ring is always kept in contact with the inner wall of the pressing chamber.

In this embodiment, whether the second punch ring 2 is used or not may be selected according to production conditions to further save costs.

In this embodiment, the first punch ring 1 and the second punch ring 2 are replaceable, that is, work for a long time in the press chamber, after the punch ring is worn out and failed, the punch ring can be replaced by a punch ring fitting of the same type and then reused, while the punch body 3 is not replaced, and only when the function of the punch body 3 fails, the punch ring needs to be replaced.

As shown in fig. 2 and 3, in the present embodiment, the front end of the first punch ring 1 is not designed with a chamfer to prevent aluminum from being pinched by aluminum material extruded into the gap by the punch due to the chamfer, and the tail of the first punch ring 1 is designed with a chamfer 12 of C1-C2 to facilitate the retraction of the punch

In this embodiment, the first Z-shaped expansion joint 13 of the first punch ring 1 is ensured to face upwards as much as possible to prevent the pull damage to the compression chamber, and the first Z-shaped expansion joint 13 and the second Z-shaped expansion joint 21 are adjusted to be on different straight lines as much as possible during installation when both the first punch ring 1 and the second punch ring 2 are used.

In this embodiment, the first punch ring 1 and the second punch ring 2 use steel rings or beryllium bronze rings in conformity with the material of the pressing chamber, and deformation due to an excessive temperature difference is prevented as much as possible.

In this embodiment, it is necessary to ensure the coaxiality of the punch body 3 and the screw hole 34, as well as the coaxiality of the first punch ring 1 and the first annular mounting groove 11 and the coaxiality of the inner and outer circles, and the coaxiality of the inner and outer circles of the second punch ring 2 itself.

In this embodiment, this punch structure of high pressure casting area punch ring has reduced the fault rate when using, has improved installation change efficiency and convenience, has more saved use cost.

The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.

Claims

1. The utility model provides a high pressure casting takes punch structure of punch ring which characterized in that: comprises a punch body (3), a first punch ring (1) and a second punch ring (2); a first annular mounting groove (11) is formed in the inner side of the first punch ring (1), a protrusion (31) is arranged on the punch body (3), and the protrusion (31) is in clearance fit with the first annular mounting groove (11); the punch body (3) is provided with a second annular mounting groove (32), and the second punch ring (2) is mounted in the second annular mounting groove (32); the center of the punch body (3) is provided with a threaded hole (34) for connecting with an injection rod.

2. The high pressure casting strip punch structure of the punch ring according to claim 1, wherein: the outer diameters of the first punch ring (1) and the second punch ring (2) are larger than the outer diameter of the punch body (3).

3. The high pressure casting punch structure with punch ring as claimed in claim 2, wherein: a first Z-shaped expansion joint (13) which is perpendicular to the end face of the first punch ring (1) and has a width a is formed on the first punch ring; the second punch ring (2) is provided with a second Z-shaped expansion joint (21) perpendicular to the end face of the ring and with the width of a.

4. A punch structure of a high pressure casting strip punch ring as claimed in claim 3, wherein: the difference of the circumference of the first annular mounting groove (11) minus the circumference of the first Z-shaped expansion joint (13) is larger than the circumference of the bulge (31).

5. The high pressure casting strip punch structure of claim 4, wherein: the length of the second punch ring (2) is smaller than the length of a second annular mounting groove (32) on the punch body (3).

6. A punch structure of a high pressure casting strip punch ring according to any one of claims 1 to 5, characterized in that: the front end of the first punch ring (1) is not provided with a chamfer, and the tail of the first punch ring (1) is provided with a C1-C2 chamfer (12).

7. The high pressure casting strip punch structure of claim 6, wherein: the first Z-shaped expansion joint (13) of the first punch ring (1) faces upwards.

8. The high pressure casting strip punch structure of claim 4, wherein: when the first punch ring (1) and the second punch ring (2) are used at the same time, the first Z-shaped expansion joint (13) and the second Z-shaped expansion joint (21) are not positioned on the same straight line.

9. The high-pressure casting punch structure of the belt punch ring as claimed in claim 1 or 2 or 3 or 4 or 5 or 7 or 8, characterized in that: the first punch ring (1) and the second punch ring (2) are made of steel or beryllium bronze.

10. The high pressure casting strip punch structure of claim 9, wherein: the tail of the punch body (3) is provided with a plane (33) for convenient installation.