Steel die punch

Abstract

A steel die punch comprises a water cooling part and a punch forging part, the punch forging part is detachably fixed below the water cooling part, the punch forging part comprises a connecting end and a forming end, the forming end can form the shape of a forge piece in an extrusion mode, the connecting end is connected with the lower end of the water cooling part, and the upper end of the water cooling part can be installed on a forging press. A water inlet and a water outlet are formed in the middle area of the water cooling part, and a water cooling channel is arranged between the water inlet and the water outlet and extends towards the lower end. The water-cooling part and the stamping and forging part are manufactured separately and then are combined and installed together, so that the shape of the stamping and forging part is simpler, the stamping and forging part can be independently replaced after a certain number of forgings are machined, and the water-cooling part is kept at a low temperature under the action of the water-cooling channel, so that the water-cooling part has high strength, basically does not deform and has long service life; and only the stamping and forging part needs to be replaced independently, so that the die loss cost is reduced.

Description

Technical Field

[0001] This application relates to the field of forging dies, and more particularly to a steel die punch. Background Technology

[0002] Forging dies are usually in contact with high-temperature forgings, resulting in high die temperatures, especially for the punch, which is in direct contact with the forging and can reach temperatures exceeding 600 degrees Celsius. Under such high temperatures and heavy loads, the working life is relatively short. Therefore, some simpler punches are equipped with water-cooling structures. However, water-cooling channels are usually quite curved and very difficult to machine. The steel used for dies is generally hard and difficult to machine, and the machining cost is also high. If cooling structures are added to other parts of the die, the cooling effect on the punch is not significant.

[0003] The Chinese patent with patent number "CN207508186U" entitled "A Water-Cooled Forging Mold" discloses a punch structure with a water-cooling channel on the punch. This results in high processing costs. The patent also does not disclose how to seal the cooling channel when the punch temperature is high, and the specific connection method of the water-cooling channel is not disclosed. There are many problems in actual implementation. Utility Model Content

[0004] This application provides a steel die punch to at least solve the above-mentioned technical problems existing in the prior art.

[0005] According to this application, a steel die punch is provided, including a water-cooled section and a forging section. The forging section is detachably fixed to the lower part of the water-cooled section. The forging section includes a connecting end and a forming end. The forming end can form the shape of a forging by extrusion. The connecting end is connected to the lower end of the water-cooled section. The upper end of the water-cooled section can be installed on a forging press. The middle area of ​​the water-cooled section is provided with a water inlet and a water outlet. A water-cooling channel is provided between the water inlet and the water outlet, and the water-cooling channel extends downward.

[0006] Compared with the prior art, the steel die punch of this application has the following advantages:

[0007] The water-cooling section and the forging section are manufactured separately and then assembled together, which makes the shape of the forging section simpler. The forging section can be replaced separately after processing a certain number of forgings. The water-cooling section maintains a low temperature under the action of the water-cooling channel, so it has high strength, basically no deformation, and a long service life. Only the forging section needs to be replaced, which reduces the cost of mold wear.

[0008] In one embodiment, the connecting end of the forging part is provided with a threaded hole with internal threads, and the lower end of the water-cooling part is provided with a threaded post with external threads, which makes installation more convenient.

[0009] In one embodiment, the inlet and outlet are located on opposite sides of the water-cooling section, which simplifies the manufacturing process.

[0010] In one embodiment, a partition is provided in the water cooling channel, which divides the water cooling channel into an inlet channel and an outlet channel. After the water is heated, the gas pressure rises significantly, so the pressure in the outlet channel is greater than that in the inlet channel. A large amount of cold water will be heated at the lower end and then evaporate into the outlet channel. The partition can achieve tight isolation.

[0011] In one embodiment, the partition is fixed on a movable seat, which is fixed on a track so that the partition can move with the movable seat under pressure. This allows the size of the inlet and outlet water channels to be automatically adjusted according to pressure changes to achieve the fastest cooling.

[0012] In one embodiment, the baffle has a certain elasticity and can bend and deform within a certain range to change the flow cross-sectional size of the inlet and outlet channels. The bottom temperature is high and the evaporation pressure is large, and the airflow density is large, so a larger flow area is required. The top temperature is low and the required connection area is reduced.

[0013] In one embodiment, a heat-conducting groove is provided near the water-cooling channel in the water-cooling section, and a locking groove is provided in the forging section. The locking groove and the heat-conducting groove have the same width and are positioned opposite each other, so that after the heat-conducting plate is inserted into the heat-conducting groove, a part of the plate is inserted into the locking groove. This design enables the heat-conducting plate to not only conduct heat but also lock.

[0014] In one embodiment, a low-melting-point metal alloy is provided in the gap between the lower end of the water-cooled section and the connecting end, which improves thermal conductivity.

[0015] In one embodiment, the connecting end of the forging part is provided with a tapered column, with one end of the tapered column being larger than the other end. The lower end of the water-cooled part is provided with a tapered hole that matches the tapered column. This allows for installation using thermal expansion and contraction. In actual use, the temperature of the forging part is relatively high, so its volume is generally large and it will not fall off.

[0016] In one embodiment, a sealing cover is provided at the upper end of the water cooling channel, and the sealing cover is provided with an isolation plate, which facilitates processing and manufacturing.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0018] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which:

[0019] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0020] Figure 1 A front view of the structural composition of a steel die punch according to an embodiment of this application is shown;

[0021] Figure 2 It shows Figure 1 Cross-sectional view along the AA direction;

[0022] Figure 3 This is a side view of the structural composition of the steel die punch according to an embodiment of this application;

[0023] Figure 4 It shows Figure 3 Cross-sectional view along the middle BB direction;

[0024] Figure 5 This paper shows a three-dimensional schematic diagram of the structural composition of a steel die punch according to an embodiment of this application;

[0025] Figure 6 A perspective view of another embodiment of the steel die punch of this application is shown;

[0026] Figure 7 A front view of the steel die punch according to an embodiment of this application is shown. Detailed Implementation

[0027] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] Example 1:

[0029] like Figure 1-5As shown, a steel die punch includes a water-cooled section 1 and a forging section 2. The forging section 2 is detachably fixed to the lower part of the water-cooled section 1. The forging section 2 includes a connecting end 23 and a forming end 24. The forming end 24 can be formed into the shape of a forging by extrusion. The connecting end 23 is connected to the lower end 13 of the water-cooled section 1. The upper end 25 of the water-cooled section 1 can be installed on a forging press. The middle area of ​​the water-cooled section 1 is provided with an inlet 14 and an outlet 15. A water-cooling channel 10 is provided between the inlet 14 and the outlet 15, and the water-cooling channel 10 extends downward to the lower end 13. The punch is cylindrical or conical, and can also be square or other irregular shapes as needed. The water-cooling channel 10 can be milled from one side of the water-cooled section 1 and then sealed with a sealing cap 3. The sealing cap 3 can be fixed by welding. Of course, for some larger punches, the water-cooled section 1 is larger in volume and the water-cooling channel 10 can be integrally formed by casting.

[0030] like Figure 2 and Figure 4 As shown, the connecting end 23 of the forging section 2 is provided with a threaded hole 21, which has an internal thread. The lower end 13 of the water-cooling section 1 is provided with a threaded post 16, which has an external thread. If turning is used, a triangular thread is required; if forging is used, a circular arc thread is required, which makes processing easier.

[0031] like Figure 1 and Figure 4 As shown, the inlet 14 and outlet 15 are located on both sides of the water-cooling section 1, which makes processing more convenient.

[0032] like Figure 4 As shown, a partition 17 is provided inside the water-cooling channel 10, dividing the water-cooling channel 10 into an inlet channel 8 and an outlet channel 9. The partition 17 is fixed on a movable seat 18, which is fixed on a track 19, allowing the partition 17 to move with the movable seat 18 under pressure. The partition 17 has a certain degree of elasticity and can bend and deform within a certain range to change the flow cross-sectional size of the inlet channel 8 and the outlet channel 9.

[0033] like Figure 2 and Figure 5 As shown, a heat-conducting groove 7 is provided in the water-cooling section 1 near the water-cooling channel 10, and a locking groove 22 is provided in the forging section 2. The locking groove 22 and the heat-conducting groove 7 have the same width and are positioned opposite each other, so that after the heat-conducting plate 4 is inserted into the heat-conducting groove 7, a part of it is inserted into the locking groove 22. The heat-conducting plate 4 is made of copper plate for better thermal conductivity.

[0034] like Figure 2 and Figure 4 As shown, a low-melting-point metal alloy, such as a tin alloy, is provided in the gap between the lower end 13 of the water-cooling section 1 and the connecting end 23, for example, at the location of the threaded hole 21.

[0035] Example 2:

[0036] like Figure 6 and Figure 7 As shown, the connecting end 23 of the forging section 2 is provided with a tapered column 5, and the upper end of the tapered column 5 is larger than the lower end. The lower end 13 of the water-cooling section 1 is provided with a tapered hole that matches the tapered column 5.

[0037] like Figure 6 and Figure 7 As shown, the upper end of the water cooling channel 10 is provided with a sealing cover 3, and the sealing cover 3 is provided with an isolation plate 6.

[0038] Forging part 2 can be made of H13 steel as raw material to manufacture forging die steel. The machined forging die H13 forging part 2 is then used as follows: Figure 1 As shown, immerse in the anti-decarbonization liquid for 5-10 minutes, then remove and air dry for later use.

[0039] The H13 forging die, part 2, soaked in anti-decarburization liquid, is placed in the heating chamber of a 75KW box furnace and heated along with the furnace. When the furnace temperature reaches 650℃, it is held for 30 minutes, then the temperature is further increased, reaching 840℃ and held for another 30 minutes. It is then transferred to a 45KW high-temperature box furnace heating chamber that has already reached 1050℃. It is held at 1050℃ for 30 minutes. After the holding time, it is removed from the furnace and quickly quenched in oil for cooling. The workpiece is cooled in oil to 200℃ (the workpiece surface will have oil fumes but will not ignite). It is then removed and air-cooled. This prevents the workpiece from cracking due to excessive stress.

[0040] After the workpiece is removed from the oil, it should be immediately placed in a 75KW box furnace at 540℃ and held for 120 minutes. Then, it should be cooled to room temperature in oil before undergoing tempering. The temperature and time should be the same as the first tempering. After each tempering cycle, the workpiece must be cooled to room temperature in oil. Note that the delay between quenching and tempering should not exceed 1 hour; if it exceeds 1 hour, the workpiece should be scrapped.

[0041] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A steel die punch, characterized in that, It includes a water-cooled section (1) and a forging section (2). The forging section (2) is detachably fixed to the bottom of the water-cooled section (1). The forging section (2) includes a connecting end (23) and a forming end (24). The forming end (24) can be formed into the shape of a forging by extrusion. The connecting end (23) is connected to the lower end (13) of the water-cooled section (1). The upper end (25) of the water-cooled section (1) can be installed on a forging press. The middle area of ​​the water-cooled section (1) is provided with a water inlet (14) and a water outlet (15). A water-cooling channel (10) is provided between the water inlet (14) and the water outlet (15). The water-cooling channel (10) extends towards the lower end (13).

2. The steel die punch according to claim 1, characterized in that, The inlet (14) and the outlet (15) are located on both sides of the water-cooling section (1).

3. The steel die punch according to claim 1, characterized in that, The water cooling channel (10) is provided with a partition (17), which divides the water cooling channel (10) into an inlet channel (8) and an outlet channel (9).

4. The steel die punch according to claim 3, characterized in that, The partition (17) is fixed on the movable seat (18), and the movable seat (18) is fixed on the track (19) so that the partition (17) can move with the movable seat (18) under pressure.

5. The steel die punch according to claim 4, characterized in that, The partition (17) has a certain elasticity and can be bent and deformed within a certain range to change the flow cross-sectional size of the water inlet channel (8) and the water outlet channel (9).

6. The steel die punch according to any one of claims 1-5, characterized in that, The connecting end (23) of the forging part (2) is provided with a threaded hole (21), the threaded hole (21) is provided with an internal thread, and the lower end (13) of the water-cooling part (1) is provided with a threaded post (16), the threaded post (16) is provided with an external thread.

7. The steel die punch according to claim 2, characterized in that, The water-cooled part (1) is provided with a heat-conducting groove (7) near the water-cooling channel (10), and a locking groove (22) is provided in the forging part (2). The locking groove (22) and the heat-conducting groove (7) are the same width and positioned opposite each other, so that after the heat-conducting plate (4) is inserted into the heat-conducting groove (7), a part of the area is inserted into the locking groove (22).

8. The steel die punch according to claim 1, characterized in that, The connecting end (23) of the forging part (2) is provided with a tapered column (5) and the upper end of the tapered column (5) is larger than the lower end. The lower end (13) of the water-cooling part (1) is provided with a tapered hole that matches the tapered column (5).

9. The steel die punch according to claim 8, characterized in that, The upper end of the water cooling channel (10) is provided with a sealing cover (3), and the sealing cover (3) is provided with an isolation plate (6).

10. The steel die punch according to claim 7, 8, or 9, characterized in that, The gap between the lower end (13) and the connecting end (23) of the water-cooled part (1) is provided with a low-melting-point metal alloy.

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