A spring-supported ring punch

Abstract

The present invention discloses a spring-supported ring punch, which is characterized in that it includes a ring seat, a connector is provided at one end of the ring seat, and the connector is connected to the ring seat through a connecting sleeve sleeved on the ring seat, and a first steel ring, at least one copper ring, and a second steel ring are sleeved on the outer circumference of the ring seat in sequence, wherein the first steel ring is a full-circle ring, the copper ring and the second steel ring are both broken rings, and the fractures of the broken rings are connected by an interlaced structure, and the interlaced structure has a movable gap, and a plurality of annular grooves are arranged at intervals on the outer circumference of the ring seat, and an internal support spring for correspondingly supporting the copper ring and the second steel ring is provided in the annular groove. The beneficial effects of the present invention include: being able to stably compensate for the friction loss between the copper ring and the melting cup, so that the copper ring is always in close contact with the inner wall of the injection chamber, and greatly improving product quality.

Description

Technical Field

[0001] The invention relates to the field of die-casting equipment parts, and in particular to a spring-supported ring punch. Background Art

[0002] Die casting is a casting method in which liquid or semi-solid metal or alloy, or liquid metal or alloy containing a reinforcing phase, is filled into the cavity of a die casting mold under high pressure and at a high speed, and the metal or alloy is solidified under pressure to form a casting.

[0003] Advantages of pressure casting

[0004] 1) High productivity, easy to mechanize and automate, and can produce thin-walled castings with complex shapes.

[0005] 2) The casting has high dimensional accuracy and small surface roughness.

[0006] 3) Parts can be embedded in die castings, which not only saves precious materials and machining hours, but also replaces the assembly process of parts, eliminating the assembly process and simplifying the manufacturing process.

[0007] The shot punch is a key component of a die casting machine. During the die casting process, it primarily forces the molten metal into the die cavity. Its performance directly impacts product quality. Existing shot punches, due to reciprocating motion and repeated friction with the melt cup and the walls of the shot chamber, are susceptible to severe wear, resulting in poor sealing. This further prevents the vacuum within the die cavity from reaching a stable state, leading to substandard product quality. This significantly reduces product yields, especially in high-vacuum die casting environments. Summary of the Invention

[0008] In view of the above-mentioned deficiencies in the prior art, the present invention provides a spring-supported ring punch, which can continuously and stably compensate for friction loss, thereby ensuring a stable sealing state.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A spring-supported ring punch, characterized in that it includes a ring seat, a connecting head is provided at one end of the ring seat, and the connecting head is connected to the ring seat by a connecting sleeve sleeved on the ring seat, and a first steel ring, at least one copper ring and a second steel ring are sequentially sleeved on the outer circumference of the ring seat from the end away from the connecting sleeve to the connecting sleeve, wherein the first steel ring is a full-circle ring and is limited on the limiting ring platform at the end of the ring seat by the internal ring platform of the first steel ring, the copper ring and the second steel ring are both broken rings, and the fracture of the broken ring is connected by an interlaced structure, and the interlaced structure has a movable gap, and a plurality of annular grooves are arranged at intervals on the outer circumference of the ring seat, and an internal support spring for correspondingly supporting the copper ring and the second steel ring is provided in the annular groove.

[0011] Furthermore, there are two copper rings, which are arranged adjacent to each other, and the outer ends of the two copper rings are axially limited by the first steel ring and the second steel ring respectively.

[0012] Furthermore, the outer end of the second steel ring is axially limited by the connecting sleeve.

[0013] Furthermore, a cooling cavity is provided in the ring seat, a connecting hole connected to the cooling cavity is provided on the ring seat, one end of the connecting head is fitted and connected to the connecting hole, the connecting hole is a stepped hole, the connecting head has a shoulder that fits and limits the stepped hole, and the connecting head has an axial cooling water channel.

[0014] Furthermore, a sealing ring is provided between the connecting head and the connecting hole.

[0015] Furthermore, the connecting sleeve is connected to the end surface of the ring seat by screws.

[0016] Furthermore, the outer end surface of the connecting sleeve has a plurality of connecting teeth distributed in a ring shape, each of the connecting teeth is provided with a radially arranged set screw, and the connecting head has a connecting groove corresponding to the set screw, and the connecting head can be axially limited by screwing the set screw into the connecting groove.

[0017] The beneficial effects of the present invention include: the steel ring and copper ring installed on the punch can stably compensate for the friction loss between the copper ring and the melting cup under the action of the internal support spring, so that the copper ring is always tightly fitted with the inner wall of the injection chamber. The high sealing state achieved by this compensation method can stably reduce the vacuum value, greatly improve product quality, and better play the cost-effectiveness advantage in the application scenario of high vacuum die casting, which plays a strong role in helping large-tonnage casting equipment produce high-end products and improve the qualification rate of high-end products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic cross-sectional structural diagram of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] A kind of Figure 1-2 The spring-supported ring punch shown includes a ring seat 1, with a connector 2 provided at one end of the ring seat 1. The connector 2 is connected to the ring seat 1 by a connecting sleeve 3 sleeved on the ring seat 1. A first steel ring 4, two copper rings 5, and a second steel ring 6 are sleeved on the outer circumference of the ring seat 1 from the end away from the connecting sleeve 3 to the connecting sleeve 3. The first steel ring 4 is a full-circle ring and is limited to the limiting ring platform 11 at the end of the ring seat 1 by the internal ring platform of the steel ring. The two copper rings 5 ​​and the second steel ring 6 are both broken rings, and the broken ends of the broken rings are connected by an interlaced structure such as a dovetail structure. The interlaced structure has a movable gap, thereby ensuring that the copper ring 5 and the second steel ring 6 have a variable diameter effect. In order to ensure the best sealing effect, all ports should not be on the same straight line, but should be staggered. A plurality of annular grooves 12 are arranged at intervals on the outer circumferential surface of the ring seat 1, and an internal support spring 7 is arranged in the annular groove 12 for correspondingly supporting the copper ring 5 and the second steel ring 6. Under the action of the internal support spring 7, the copper ring 5 and the second steel ring 6 always bulge outward, which can offset the loss caused by wear, thereby ensuring precise fit between the punch and the wall of the injection chamber and good sealing.

[0022] like Figure 2 As shown, the outer ends of the two copper rings 5 ​​are axially restrained by the first steel ring 4 and the second steel ring 6, respectively. The outer ends of the two copper rings 5 ​​are also radially offset from the first and second steel rings 4 and 6, respectively, with the copper ring 5 positioned inside and the steel rings outside. This structure effectively restrains the copper rings 5 ​​while ensuring excellent sealing. The outer end of the second steel ring 6 is axially restrained by the connecting sleeve 3.

[0023] In order to ensure a good cooling effect of the punch, a cooling cavity 13 is provided in the ring seat 1, and a connecting hole connected to the cooling cavity 13 is provided on the ring seat 1. One end of the connector 2 is fitted and connected to the connecting hole. The connecting hole is a stepped hole. The connector 2 has a shoulder that cooperates with the stepped hole to limit the position. The connector 2 has an axial cooling water channel 21.

[0024] like Figure 2As shown, in this embodiment, the connecting sleeve 3 is connected to the end face of the ring seat 1 via screws. The outer end face of the connecting sleeve 3 has a plurality of connecting teeth 31 arranged in an annular pattern. Each connecting tooth 31 is provided with a radially arranged set screw 8. The connector 2 has a connecting groove 22 corresponding to the set screw 8. Screwing the set screw 8 into the connecting groove 22 secures the connector 2 in an axially restricted position. This structure facilitates disassembly of the connector 2.

[0025] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A spring-supported ring punch, characterized in that: The invention comprises a ring seat (1), wherein one end of the ring seat (1) is provided with a connector (2), and the connector (2) is connected to the ring seat (1) by means of a connector sleeve (3) sleeved on the ring seat (1), and a first steel ring (4), two copper rings (5), and a second steel ring (6) are sleeved on the outer circumference of the ring seat (1) from the end away from the connector sleeve (3) to the connector sleeve (3), and the two copper rings (5) are arranged adjacent to each other, and the outer ends of the two copper rings (5) are axially limited by the first steel ring (4) and the second steel ring (6), respectively, wherein the first steel ring (4) is a full-circle ring, and is limited on the limiting ring platform (11) at the end of the ring seat (1) by the ring platform inside the first steel ring (4), and the outer end of the second steel ring (6) is axially limited by the connecting sleeve (3), and the copper ring (5) and the second steel ring (6) are both broken rings, and the fractures of the broken rings are connected by an interlaced structure, and the interlaced structure has a movable gap. A plurality of annular grooves (12) are arranged on the outer circumferential surface of the ring seat (1), and an inner support spring (7) is arranged in the annular groove (12) for correspondingly supporting the copper ring (5) and the second steel ring (6); The ring platform of the first steel ring (4) and the limiting ring platform (11) of the ring seat (1) form a nested axial positioning structure, the second steel ring (6) realizes bidirectional axial limiting through the stepped surface of the connecting sleeve (3), and an independent sealing chamber for the two copper rings (5) is formed between the first steel ring (4) and the second steel ring (6).

2. The spring-supported ring punch according to claim 1, characterized in that: The ring seat (1) has a cooling cavity (13) therein, and the ring seat (1) has a connecting hole connected to the cooling cavity (13). One end of the connector (2) is connected to the connecting hole in a fitting manner. The connecting hole is a stepped hole. The connector (2) has a shaft shoulder that fits with the stepped hole and limits the position. The connector (2) has an axial cooling water channel (21).

3. The spring-supported ring punch according to claim 2, characterized in that: A sealing ring (9) is also provided between the connecting head (2) and the connecting hole.

4. The spring-supported ring punch according to claim 1, characterized in that: The connecting sleeve (3) is connected to the end surface of the ring seat (1) via screws.

5. The spring-supported ring punch according to claim 1, characterized in that: The outer end surface of the connecting sleeve (3) has a plurality of connecting teeth (31) distributed in an annular shape, and each connecting tooth (31) is provided with a radially arranged set screw (8). The connecting head (2) has a connecting groove (22) corresponding to the set screw (8), and the connecting head (2) can be axially limited by screwing the set screw (8) into the connecting groove (22).

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