Trimming die for die castings

Abstract

The utility model discloses a kind of trimming die of die casting, including punch press body, the top of the punch press body is fixedly connected with hydraulic oil cylinder, the bottom of the output end of hydraulic oil cylinder is fixedly connected with upper cutting die, the outer wall of the punch press body is fixedly connected with lower cutting die, the inside of the punch press body is fixedly connected with bracket, the bottom of the bracket is fixedly connected with stepper motor, the outer wall of stepper motor output shaft is fixedly connected with air inlet pipe.The utility model is rotated by stepper motor drive air inlet pipe, cooperate external high-pressure air pump and send compressed air to air inlet pipe through hose, rotary joint, airflow is high-speed sprayed from multiple evenly distributed purge holes, cleaning is realized by means of rotary purge, blow off metal scrap retained in the surface of lower cutting template and gap, avoid the quality problem such as workpiece positioning deviation, surface scratch caused by scrap, while the design that purge pipe is connected with butt joint sleeve screw thread facilitates disassembly and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of edge trimming technology, and in particular to an edge trimming mold for die castings. Background Technology

[0002] Die casting refers to metal parts formed by rapidly injecting molten metal (commonly aluminum alloys, zinc alloys, magnesium alloys, etc.) into a mold cavity under high pressure, followed by cooling and solidification. During the high-speed injection and cooling process, excess metal residue is generated at the gate, flash, and burrs. If this excess metal is not trimmed, it will affect the part's dimensions, assembly fit, and surface quality, and may even lead to problems such as jamming and stress concentration during subsequent processing or use. Therefore, trimming (deburring, chamfering) is a crucial post-processing step for die castings, used to remove excess metal, improve appearance, and ensure the functionality and reliability of the part.

[0003] In existing technologies, metal shavings generated during the trimming process of die castings tend to remain on the surface of the lower cutting die and in the die gaps. If not cleaned in time, they will not only affect the positioning of subsequent die castings, leading to quality problems such as trimming dimensional deviations and workpiece surface scratches, but may also exacerbate die wear and shorten the die's service life. Therefore, we propose a trimming die for die castings to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a cutting mold for die castings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cutting die for a die-casting part includes a press body. A hydraulic cylinder is fixedly connected to the top of the press body. An upper cutting die is fixedly connected to the bottom of the output end of the hydraulic cylinder. A lower cutting die is fixedly connected to the outer wall of the press body. A bracket is fixedly connected inside the press body. A stepper motor is fixedly connected to the bottom of the bracket. An air inlet pipe is fixedly connected to the outer wall of the output shaft of the stepper motor. A rotary joint is fixedly connected to one end of the air inlet pipe. A flexible hose is fixedly connected to the outer wall of the rotary joint. A vertical pipe is fixedly connected to the outer wall of the air inlet pipe. A connecting sleeve is fixedly connected to the outer wall of the vertical pipe. A purging assembly is provided at one end of the connecting sleeve.

[0007] Preferably, the blowing assembly includes a blowing pipe, a rubber gasket is fixedly connected to the inner wall of the docking sleeve, the inner wall of the docking sleeve is threaded to one end of the blowing pipe, and multiple blowing holes are evenly opened on the outer wall of the blowing pipe. The multiple blowing holes are evenly distributed to ensure that the airflow has a wide coverage range, which can quickly and thoroughly blow away the cutting edge debris on the surface and in the gaps of the lower cutting mold, thus ensuring the cleaning effect.

[0008] Preferably, the outer wall of the stamping machine body is fixedly connected with two guide plates, which are adapted to the sliding trajectory of the upper cutting die and mainly serve as guides and limiters.

[0009] Preferably, the outer wall of the press body is provided with a through hole, and the inner wall of the through hole is rotatably connected to the outer wall of the air inlet pipe.

[0010] Preferably, a high-pressure air pump is fixedly connected to one end of the hose.

[0011] Preferably, one end of the purge tube is pressed against the outer wall of the rubber gasket, and the rubber gasket fills the gap at the connection, thereby achieving a seal during the high-pressure gas transmission process.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] This solution uses a stepper motor to drive the air intake pipe to rotate, and an external high-pressure air pump delivers compressed air to the air intake pipe through a hose and a rotary joint. The airflow is ejected at high speed from multiple evenly distributed blow holes, and cleaning is achieved by rotating the blower. This removes metal debris that remains on the surface and in the gaps of the cutting template, avoiding quality problems such as workpiece positioning deviation and surface scratches caused by debris. At the same time, the design of the threaded connection between the blow pipe and the mating sleeve facilitates disassembly and maintenance. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of a die-casting edge-cutting mold proposed in this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of a die-casting edge-cutting mold proposed in this utility model;

[0017] Figure 3 This utility model proposes a cutting mold for die castings. Figure 2 A magnified structural diagram of part A in the diagram.

[0018] In the diagram: 1. Press body; 2. Hydraulic cylinder; 3. Guide plate; 4. Upper cutting die; 5. Lower cutting die; 6. Support; 7. Stepper motor; 8. Air inlet pipe; 9. Rotary joint; 10. Hose; 11. Vertical pipe; 12. Connecting sleeve; 13. Rubber gasket; 14. Blow pipe; 15. Blow hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] Depend on Figures 1-3 As shown, a cutting die for a die-casting part is disclosed, including a press body 1 (TJSH-65). A hydraulic cylinder 2 is fixedly connected to the top of the press body 1 (TJSH-65). Two guide plates 3 are fixedly connected to the outer wall of the press body 1 (TJSH-65). The two guide plates 3 are adapted to the sliding trajectory of the upper cutting die 4 and mainly play a guiding and limiting role to ensure that the upper cutting die 4 moves smoothly in a preset direction when the hydraulic cylinder 2 drives it to move downward. The upper cutting die 4 is fixedly connected to the bottom of the output end of the hydraulic cylinder 2. A lower cutting die 5 is fixedly connected to the outer wall of the press body 1 (TJSH-65).

[0022] The stamping press body 1 (TJSH-65) is internally fixedly connected to a bracket 6. A stepper motor 7 is fixedly connected to the bottom of the bracket 6. An existing encoder is installed on the outer wall of the output shaft of the stepper motor 7. The position of the output shaft is detected by the encoder. An air inlet pipe 8 is fixedly connected to the outer wall of the output shaft of the stepper motor 7. The air inlet pipe 8 rotates under the drive of the stepper motor 7. A through hole is opened on the outer wall of the stamping press body 1 (TJSH-65). The inner wall of the through hole is rotatably connected to the outer wall of the air inlet pipe 8.

[0023] A rotary joint 9 is fixedly connected to one end of the air intake pipe 8. A hose 10 is fixedly connected to the outer wall of the rotary joint 9. The rotary joint 9 ensures that the hose 10 can still stably deliver high-pressure gas when the air intake pipe 8 rotates, avoiding gas leakage or hose 10 tangling. A high-pressure air pump is fixedly connected to one end of the hose 10. A vertical pipe 11 is fixedly connected to the outer wall of the air intake pipe 8. A connecting sleeve 12 is fixedly connected to the outer wall of the vertical pipe 11.

[0024] One end of the docking sleeve 12 is provided with a purging assembly, which includes a purging tube 14. A rubber gasket 13 is fixedly connected to the inner wall of the docking sleeve 12. The inner wall of the docking sleeve 12 is threadedly connected to one end of the purging tube 14. Multiple purging holes 15 are evenly opened on the outer wall of the purging tube 14. One end of the purging tube 14 is pressed against the outer wall of the rubber gasket 13. The rubber gasket 13 is made of a material with good elasticity and sealing performance. When the purging tube 14 is threadedly connected to the docking sleeve 12, its outer wall is pressed against one end of the purging tube 14, filling the gap at the connection and achieving sealing during the high-pressure gas transmission process, thus preventing gas leakage from affecting the purging effect.

[0025] Working principle: During use, the die-cast part is placed on the top of the lower cutting die 5. The hydraulic cylinder 2 drives the upper cutting die 4 to move downward, working together with the lower cutting die 5 fixed to the outer wall of the press body 1 to complete the punching of the workpiece. After the edge cutting is completed, the stepper motor 7 fixed to the bottom of the internal support 6 of the press body 1 is started, driving the air inlet pipe 8 on the outer wall of its output shaft to swing back and forth. The high-pressure air pump delivers compressed air to the air inlet pipe 8 through the hose 10 and the rotary joint 9. The airflow enters the docking sleeve 12 through the vertical pipe 11 connected to the outer wall of the air inlet pipe 8. The blowing component then works. Compressed air flows into the blowing pipe 14, which is sealed and threaded to the inner wall of the docking sleeve 12 through the rubber gasket 13. Finally, it is ejected at high speed from multiple blowing holes 15 evenly opened on its outer wall, completely blowing away the edge cutting waste retained on the lower cutting die 5. The edge cutting waste that falls to the ground can be cleaned and collected periodically.

[0026] It should be noted that when actually put into use, an existing PLC controller can be added. The PLC controller is electrically connected to the press body 1, hydraulic cylinder 2, stepper motor 7, high-pressure air pump, and encoder to facilitate the control of the overall operation.

[0027] All standard parts used in this utility model can be purchased from the market. Irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. Furthermore, the structure and principle of the components known to those skilled in the art can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0028] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die for trimming edges of a die-casting part, comprising a press body (1), characterized in that, A hydraulic cylinder (2) is fixedly connected to the top of the press body (1). An upper cutting die (4) is fixedly connected to the bottom of the output end of the hydraulic cylinder (2). A lower cutting die (5) is fixedly connected to the outer wall of the press body (1). A bracket (6) is fixedly connected inside the press body (1). A stepper motor (7) is fixedly connected to the bottom of the bracket (6). An air inlet pipe (8) is fixedly connected to the outer wall of the output shaft of the stepper motor (7). A rotary joint (9) is fixedly connected to one end of the air inlet pipe (8). A hose (10) is fixedly connected to the outer wall of the rotary joint (9). A vertical pipe (11) is fixedly connected to the outer wall of the air inlet pipe (8). A docking sleeve (12) is fixedly connected to the outer wall of the vertical pipe (11). A purging assembly is provided at one end of the docking sleeve (12).

2. The edge-trimming mold for a die-casting part according to claim 1, characterized in that, The purging assembly includes a purging tube (14), a rubber gasket (13) is fixedly connected to the inner wall of the docking sleeve (12), the inner wall of the docking sleeve (12) is threaded to one end of the purging tube (14), and a plurality of purging holes (15) are evenly opened on the outer wall of the purging tube (14).

3. The edge-trimming mold for a die-casting part according to claim 1, characterized in that, Two guide plates (3) are fixedly connected to the outer wall of the press body (1).

4. The edge-trimming mold for a die-casting part according to claim 1, characterized in that, The outer wall of the press body (1) is provided with a through hole, and the inner wall of the through hole is rotatably connected to the outer wall of the air inlet pipe (8).

5. The edge-trimming mold for a die-casting part according to claim 1, characterized in that, One end of the hose (10) is fixedly connected to a high-pressure air pump.

6. The edge-trimming mold for a die-casting part according to claim 2, characterized in that, One end of the purge tube (14) is pressed against the outer wall of the rubber gasket (13).

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