Hollow KO with exhaust hole in top

Abstract

The utility model relates to a hollow KO with a top vent hole, which comprises a KO column, a central water inlet hole is formed on the lower end surface of the KO column, an annular cutting groove is formed on the outer wall of the middle and upper part of the KO column, and a plurality of water spraying cooling holes penetrating through the bottom surface of the cutting groove are formed on the inner wall of the central water inlet hole. A vertical exhaust hole communicated with the central water inlet hole is formed in the middle of the upper end face of the KO column, and the hole diameter of the exhaust hole is smaller than that of the water spraying cooling hole. According to the hollow KO, the exhaust holes are formed in the top of the KO, heat dissipation is conducted through the exhaust holes, heat of a workpiece is prevented from being gathered at the top of the KO, and then the probability that the top of the KO is fused and fails can be effectively reduced.

Description

Technical field:

[0001] The utility model relates to the technical field of forging dies, in particular to a hollow KO with an exhaust hole on the top. Background technology:

[0002] Common bearings currently include an outer ring, an inner ring, a ball and a cage, of which the outer ring and the inner ring are called ferrules. The ferrules are machined from annular blanks, while the blanks are pressed into cakes by bar stock, and the cakes are then processed by forging, casting, rolling and other methods. Forging, or forging for short, is an important process in the processing of bearing rings. Forging is divided into cold forging and hot forging. Hot forging refers to forging a heated workpiece with a forging die. During the hot forging process, the forging die needs to be cooled by spraying water. After one forging, the die seat 1 needs to be cooled by spraying water. The water is mainly sprayed on the inner wall of the die groove, such as Figure 1 As shown, a central water inlet hole 11 is formed on the KO column 1, and the water spray cooling hole on the KO column 1 is used to cool the forging die; however, in the actual production process, the heat of the workpiece will be transferred to the KO, and the heat will accumulate at the top of the KO column, seriously affecting the service life of the KO column. Utility model content:

[0003] The purpose of the utility model is to address the deficiencies of the prior art and to provide a hollow KO with an exhaust hole on the top, which can use the exhaust hole on the top of the hollow KO to dissipate heat, avoid the heat of the workpiece from accumulating on the top of the KO, and effectively reduce the probability of KO top melting failure.

[0004] A hollow KO with an exhaust hole on the top comprises a KO column, a central water inlet hole is formed on the lower end surface of the KO column, an annular groove is formed on the outer wall of the middle and upper parts of the KO column, a plurality of water spray cooling holes penetrating the bottom surface of the groove are formed on the inner wall of the central water inlet hole, a vertical exhaust hole connected to the central water inlet hole is formed in the middle of the upper end surface of the KO column, and the aperture of the exhaust hole is smaller than the aperture of the water spray cooling hole.

[0005] Preferably, the diameter of the central water inlet hole on the KO column is larger than the diameter of the water spray cooling hole, and the diameter of the exhaust hole is equal to 1 / 5 to 1 / 4 of the diameter of the water spray cooling hole.

[0006] Preferably, the central axis of the KO column, the central axis of the central water inlet hole and the central axis of the exhaust hole are on the same straight line.

[0007] Preferably, a vertical dredging shaft opposite to the exhaust hole is inserted into the central water inlet hole of the KO column, an inverted truncated cone-shaped counterweight is fixed to the lower end sleeve of the dredging shaft, a positioning sleeve is sleeved on the dredging shaft on the upper side of the counterweight, a plurality of spokes are formed on the outer wall of the positioning sleeve, an external threaded sleeve is formed on the outer end of the spoke, an internal thread is formed on the inner wall of the lower part of the central water inlet hole, and the external threaded sleeve is screwed into the central water inlet hole of the KO column; a limiting block is pressed against the upper end surface of the positioning sleeve, and the limiting block sleeve is fixed on the dredging shaft.

[0008] Preferably, a conical guide opening is formed between the exhaust hole and the central water inlet hole on the KO column, and the upper end of the dredging shaft is inserted into the guide opening of the KO column.

[0009] Preferably, the central axis of the dredging shaft in the KO column coincides with the central axis of the exhaust hole, and the aperture of the exhaust hole is larger than the diameter of the dredging shaft.

[0010] Preferably, the length of the dredging shaft on the upper side of the limit block is greater than the length of the exhaust hole on the KO column, and the distance from the counterweight block to the lower end surface of the positioning sleeve is greater than the length of the exhaust hole.

[0011] The beneficial effects of the utility model are:

[0012] The hollow KO is provided with exhaust holes on the top of the KO, and the exhaust holes are used for heat dissipation, so as to avoid the heat of the workpiece from being accumulated on the top of the KO, thereby effectively reducing the probability of the top of the KO being melted and failing. Description of the drawings:

[0013] Figure 1 It is a schematic diagram of the cross-sectional structure of the existing hollow KO;

[0014] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0015] Figure 3 It is a cross-sectional schematic diagram of the utility model with a built-in dredging structure.

[0016] In the figure: 1. KO column; 11. Center water inlet hole; 12. Cutting groove; 13. Water spray cooling hole; 14. Exhaust hole; 15. Guide port; 16. Internal thread; 2. Forging die; 3. Workpiece; 4. Clearing shaft; 5. Counterweight; 6. Positioning sleeve; 61. Spoke rod; 62. External thread sleeve; 7. Limit block. Specific implementation method:

[0017] Example: See Figure 2As shown, a hollow KO with an exhaust hole on the top includes a KO column 1, a central water inlet hole 11 is formed on the lower end surface of the KO column 1, an annular groove 12 is formed on the outer wall of the middle and upper parts of the KO column 1, a plurality of water spray cooling holes 13 penetrating the bottom surface of the groove 12 are formed on the inner wall of the central water inlet hole 11, and a vertical exhaust hole 14 connected to the central water inlet hole 11 is formed in the middle of the upper end surface of the KO column 1, and the aperture of the exhaust hole 14 is smaller than the aperture of the water spray cooling hole 13.

[0018] The aperture of the central water inlet hole 11 on the KO column 1 is larger than that of the water spray cooling hole 13, and the aperture of the exhaust hole 14 is equal to 1 / 5 to 1 / 4 of the aperture of the water spray cooling hole 13. The aperture of the exhaust hole 14 is smaller. When water enters the central water inlet hole 11, the water flow is mainly ejected through the water spray cooling hole 13. Because the aperture of the exhaust hole 14 is small, although water will enter, the water pressure in the exhaust hole 14 is small, and the water coming out of the exhaust hole 14 will not splash out of the forging die.

[0019] The central axis of the KO column 1, the central axis of the central water inlet hole 11 and the central axis of the exhaust hole 14 are on the same straight line.

[0020] See Figure 3 As shown, the KO column 1 is inserted in the forging die 2, and a workpiece 3 is arranged in the forging die 2, and the upper end of the KO column 1 is against the lower end surface of the workpiece 3; a vertical dredging shaft 4 opposite to the exhaust hole 14 is inserted in the central water inlet hole 11 of the KO column 1, and an inverted truncated cone-shaped counterweight 5 is fixed to the lower end of the dredging shaft 4, and a positioning sleeve 6 is inserted on the dredging shaft 4 on the upper side of the counterweight 5, and a plurality of spokes 61 are formed on the outer wall of the positioning sleeve 6, and an external thread sleeve 62 is formed on the outer end of the spoke 61, and an internal thread 16 is formed on the inner wall of the lower part of the central water inlet hole 11, and an external thread The sleeve 62 is screwed into the central water inlet hole 11 of the KO column 1; the upper end surface of the positioning sleeve 6 is pressed against the limit block 7, and the limit block 7 is fixed on the dredging shaft 4. The main function of the dredging shaft 4 is to dredge the exhaust hole 14. Because the chips, impurities, etc. on the workpiece 3 fall into the exhaust hole 14 of the KO column 1, the exhaust hole 14 will be blocked. Therefore, when the workpiece 3 is separated from the KO column 1, water is fed into the KO column 1, and the water pressure drives the counterweight block 5 to move upward, and then the dredging shaft 4 extends into the exhaust hole 14 to push the chips, impurities, etc. in the exhaust hole 14 out of the exhaust hole 14.

[0021] A conical guide opening 15 is formed between the air exhaust hole 14 and the central water inlet hole 11 on the KO column 1 , and the upper end of the dredging shaft 4 is inserted into the guide opening 15 of the KO column 1 .

[0022] The central axis of the dredging shaft 4 in the KO column 1 coincides with the central axis of the exhaust hole 14 , and the aperture of the exhaust hole 14 is larger than the diameter of the dredging shaft 4 .

[0023] The length of the dredging shaft 4 on the upper side of the limit block 7 is greater than the length of the exhaust hole 14 on the KO column 1 , and the distance from the counterweight block 5 to the lower end surface of the positioning sleeve 6 is greater than the length of the exhaust hole 14 .

[0024] Working principle: The utility model is a hollow KO with an exhaust hole on the top. The exhaust hole 14 is mainly added on the top of the hollow KO. Heat can be dissipated through the exhaust hole 14, which can effectively reduce the heat accumulation on the top of the KO column 1, thereby reducing the probability of melting failure.

[0025] The embodiments are used to illustrate the present invention, but not to limit the present invention. Any person skilled in the art may modify the embodiments without violating the spirit and scope of the present invention, and therefore the scope of protection of the present invention shall be as set forth in the claims of the present invention.

Claims

1. A hollow KO with an exhaust hole at the top, comprising a KO column (1), a central water inlet hole (11) formed on the lower end surface of the KO column (1), an annular groove (12) formed on the outer wall of the middle and upper parts of the KO column (1), and a plurality of water spray cooling holes (13) penetrating the bottom surface of the groove (12) formed on the inner wall of the central water inlet hole (11), characterized in that: A vertical exhaust hole (14) connected to the central water inlet hole (11) is formed in the middle of the upper end surface of the KO column (1), and the diameter of the exhaust hole (14) is smaller than the diameter of the water spray cooling hole (13).

2. A hollow KO with an exhaust hole on the top according to claim 1, characterized in that: The diameter of the central water inlet hole (11) on the KO column (1) is larger than the diameter of the water spray cooling hole (13), and the diameter of the exhaust hole (14) is equal to 1 / 5 to 1 / 4 of the diameter of the water spray cooling hole (13).

3. A hollow KO with an exhaust hole on the top according to claim 1, characterized in that: The central axis of the KO column (1), the central axis of the central water inlet hole (11) and the central axis of the exhaust hole (14) are on the same straight line.

4. A hollow KO with an exhaust hole on the top according to claim 1, characterized in that: A vertical dredging shaft (4) opposite to the exhaust hole (14) is inserted into the central water inlet hole (11) of the KO column (1); an inverted truncated cone-shaped counterweight (5) is fixedly inserted into the lower end of the dredging shaft (4); a positioning sleeve (6) is inserted into the dredging shaft (4) on the upper side of the counterweight (5); a plurality of spokes (61) are formed on the outer wall of the positioning sleeve (6); an external thread sleeve (62) is formed at the outer end of the spokes (61); an internal thread (16) is formed on the inner wall of the lower part of the central water inlet hole (11); the external thread sleeve (62) is screwed into the central water inlet hole (11) of the KO column (1); the upper end surface of the positioning sleeve (6) is pressed against a limit block (7); the limit block (7) is fixedly inserted into the dredging shaft (4).

5. A hollow KO with an exhaust hole on the top according to claim 4, characterized in that: A conical guide opening (15) is formed between the exhaust hole (14) and the central water inlet hole (11) on the KO column (1), and the upper end of the dredging shaft (4) is inserted into the guide opening (15) of the KO column (1).

6. A hollow KO with an exhaust hole on the top according to claim 5, characterized in that: The central axis of the dredging shaft (4) in the KO column (1) coincides with the central axis of the exhaust hole (14), and the diameter of the exhaust hole (14) is larger than the diameter of the dredging shaft (4).

7. A hollow KO with an exhaust hole on the top according to claim 4, characterized in that: The length of the dredging shaft (4) on the upper side of the limit block (7) is greater than the length of the exhaust hole (14) on the KO column (1), and the distance from the counterweight block (5) to the lower end surface of the positioning sleeve (6) is greater than the length of the exhaust hole (14).

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