阅读说明：本技术 一种埋设于轮毂模具内的冷却水道及其制造方法 (Cooling water channel embedded in hub die and manufacturing method thereof ) 是由 范国勇 刘方宝 于 2021-10-09 设计创作，主要内容包括：一种埋设于轮毂模具内的冷却水道,包括设置在母体上的环形凹槽,环形凹槽的底部设有半圆形下凹槽,环形凹槽内嵌设有环形隔板,环形隔板的底面设有半圆形上凹槽,半圆形上凹槽与半圆形下凹槽相对围拢构成冷却水通道,环形隔板的上面嵌设有环形盖板,环形盖板与环形凹槽的上端平齐,环形盖板的内外沿口分别与环形凹槽上端的内外沿口焊接固定在一起,环形盖板将环形隔板压制在环形凹槽内,环形隔板将冷却水与环形盖板完全隔开,使用过程中冷却水冲击不到环形盖板,可以大大降低冷却水对焊缝部位的影响。本发明还合理改进了冷却水道结构的焊接工艺,使得焊缝部位性能更加稳定。利用本发明制造出来的轮毂模具可以延缓冷却水道开裂,提高模具使用寿命。(The utility model provides a bury cooling water course in wheel hub mould underground, including setting up the annular groove on the matrix, the bottom of annular groove is equipped with the semi-circular lower groove, the embedded annular baffle that is equipped with of annular groove, the bottom surface of annular baffle is equipped with semi-circular upper groove, semi-circular upper groove and semi-circular lower groove enclose relatively and constitute the cooling water passageway, the higher authority of annular baffle inlays and is equipped with annular cover plate, annular cover plate and annular groove's upper end parallel and level, the interior outer bead of annular cover plate respectively with the interior outer bead welded fastening of annular groove upper end together, annular cover plate suppresses annular baffle in annular groove, annular baffle separates cooling water and annular cover plate completely, the annular cover plate can not hit by the cooling water in the use, can greatly reduced the influence at cooling water butt weld position. The invention also reasonably improves the welding process of the cooling water channel structure, so that the performance of the welding seam part is more stable. The wheel hub die manufactured by the invention can delay the cracking of the cooling water channel and prolong the service life of the die.)

1. The utility model provides a bury cooling water course in wheel hub mould underground, wheel hub mould includes mould, lower mould and side forms, go up mould, lower mould and side forms and all can regard as the matrix of burying underground of cooling water course, its characterized in that the cooling water course is including setting up the annular groove on the matrix, the bottom of annular groove is equipped with semi-circular lower groove, the embedded annular baffle that is equipped with of annular groove, the bottom surface of annular baffle is equipped with semi-circular upper groove, semi-circular upper groove and semi-circular lower groove enclose relatively and close up and constitute the cooling water channel, the higher authority of annular baffle inlays and is equipped with annular cover plate, annular cover plate and annular groove's upper end parallel and level, the interior outer bead of annular cover plate respectively with the interior bead welded fastening of annular groove upper end together, annular cover plate suppresses annular baffle in annular groove.

2. The cooling water channel embedded in the wheel hub die as claimed in claim 1, wherein the central portion of one side of the semicircular lower groove at the bottom of the annular groove is provided with a lower concave blind hole, the central portion of one side of the semicircular upper groove at the bottom of the annular partition plate is provided with a corresponding upper concave blind hole, the upper concave blind hole and the lower concave blind hole are relatively enclosed to form a water-proof pin hole, a water-proof pin is tightly matched in the water-proof pin hole, one side of the water-proof pin is provided with a water inlet hole penetrating through the annular partition plate and the annular cover plate, the other side of the water-proof pin is provided with a water outlet hole penetrating through the annular partition plate and the annular cover plate, and the water inlet hole and the water outlet hole are respectively connected with a water inlet port and a water outlet port.

3. The cooling water channel embedded in the wheel hub mold as claimed in claim 1, wherein the middle portions of the two opposite sides of the semicircular lower groove at the bottom of the annular groove are provided with lower concave blind holes, the middle portions of the two opposite sides of the semicircular upper groove at the bottom of the annular partition plate are provided with corresponding upper concave blind holes, the upper concave blind holes and the lower concave blind holes are relatively enclosed to form water-proof pin holes, water-proof pins are tightly matched in the water-proof pin holes, the cooling water channel is divided into two sections by the two water-proof pins, water inlet holes penetrating through the annular partition plate and the annular cover plate are formed in two sides of one of the water-proof pins, water outlet holes penetrating through the annular partition plate and the annular cover plate are formed in two sides of the other water-proof pin, and the water inlet holes and the water outlet holes are respectively connected with a water inlet interface and a water outlet interface.

4. The cooling water channel embedded in the hub mold according to claim 2 or 3, wherein the diameter of the water stop pin is slightly larger than that of the cooling water channel, and the depth of each of the upper concave blind hole and the lower concave blind hole is slightly larger than half of the length of the water stop pin.

5. A manufacturing method of a cooling water channel, wherein the cooling water channel is embedded in a hub die, is characterized by comprising the following steps:

the annular partition plate is pressed and embedded into the annular groove by utilizing a tool, so that the bottom surface of the annular partition plate is tightly attached to the bottom of the annular groove, a gap between the annular partition plate and the annular groove is avoided, the semicircular upper groove and the semicircular lower groove are relatively enclosed to form a cooling water channel, then the inner edge and the outer edge of the annular partition plate are fixed on the inner wall of the annular groove in a spot welding manner, and the welding spots are polished and ground after the tool is removed;

pressing the annular cover plate, cleaning the annular groove, pressing and embedding the annular cover plate into the annular groove by using a tool so that the annular cover plate is tightly attached to the annular partition plate, then spot-welding the inner and outer edges of the annular cover plate on the inner and outer edges at the upper end of the annular groove respectively, and dismantling the tool after spot-welding is pre-fixed;

heating the hub mould, putting the hub mould pre-fixed by spot welding into a heating furnace for heating, and keeping the temperature for 2 hours when the temperature rises to 400 ℃;

welding the annular cover plate, taking out the hub mold from the heating furnace, continuously measuring the temperature of the hub mold by using an infrared temperature measuring gun, respectively welding and fixing the inner edge opening and the outer edge opening of the annular cover plate on the inner edge opening and the outer edge opening at the upper end of the annular groove when the temperature of the hub mold is reduced to between 250 ℃ and 300 ℃, forming a welding seam between the inner edge opening and the outer edge opening, and dismantling the tool after welding is finished;

fifthly, carrying out tempering treatment, namely putting the welded hub mould into the heating furnace again for heating, and keeping the temperature for 1.5h when the temperature rises to 300 ℃;

sixthly, cooling, turning off the heating furnace, naturally cooling the wheel hub mold in the heating furnace to room temperature, and taking out the wheel hub mold.

6. The method for manufacturing the cooling water channel according to claim 5, characterized in that in the step of manufacturing, when the inner and outer edge openings of the annular partition plate are fixed on the inner wall of the annular groove by spot welding, the welding points are symmetrically arranged along the diameter, the number of the welding points is double, and the distance between every two adjacent welding points is 45-60 mm.

7. The method for manufacturing the cooling water channel according to claim 5, characterized in that in the second step of the manufacturing method, when the inner and outer beads of the annular cover plate are respectively fixed on the inner and outer beads at the upper end of the annular groove by spot welding, the welding spots are symmetrically arranged along the diameter, the number of the welding spots is two, and the distance between the adjacent welding spots is 45-60 mm.

8. The method for manufacturing a cooling waterway according to claim 5, wherein in the step of step four of the manufacturing method, when the annular cover plate is welded, the welding current is 110-130A, the welding voltage is 21-31V, and the welding speed is 5 mm/s.

9. The method for manufacturing a cooling water channel according to claim 6, characterized in that in the step of manufacturing, when the inner and outer edge openings of the annular partition plate are fixed to the inner wall of the annular groove by spot welding, the distance between adjacent welding points is 50-55 mm.

10. The method for manufacturing a cooling water channel as claimed in claim 7, wherein the steps of the manufacturing method are that, when the inner and outer rims of the annular cover plate are respectively fixed on the inner and outer rims of the upper end of the annular groove by spot welding, the distance between adjacent welding points is 50-55 mm.

Technical Field

The invention belongs to the technical field of hub molds, and particularly relates to a cooling water channel embedded in a hub mold and a manufacturing method thereof.

Background

For reducing aluminum alloy wheel hub's manufacturing cost, stable casting process promotes product quality, ensures wheel hub's safety in utilization performance, buries many cooling water channels underground inside the wheel hub mould usually, pours into the pure water of constant temperature and constant pressure then discharges to take away the heat of wheel hub mould, reduce the holistic temperature of product and mould, satisfy casting process's demand. The hub mold generally includes an upper mold, a lower mold and a side mold, and cooling water channels can be embedded in the upper mold, the lower mold and the side mold according to design requirements, so that the upper mold, the lower mold and the side mold can be relatively used as embedding matrixes of the cooling water channels. The cooling water channel embedded in the mother body enables the mold to be cooled more uniformly without dead angles, is not influenced by deformation, and can fully cool the product and the mold.

Under the influence of production operation and casting process, the hub die needs to be switched continuously at low temperature and high temperature, and the requirement on the welding seam part of the cooling water channel is high. In the prior art, due to unreasonable structural design and welding process, the welding seam part of the cooling water channel is often the weak point of the cooling water channel, once the cooling water channel is cracked, adverse effects such as production pause and process disorder are caused, the working efficiency is reduced, the repair cost is increased, and early scrapping of a die is easily caused.

Disclosure of Invention

The invention mainly solves the technical problems in the prior art and provides a cooling water channel embedded in a hub die and a manufacturing method thereof.

The technical problem of the invention is mainly solved by the following technical scheme: the utility model provides a bury cooling water course in wheel hub mould underground, wheel hub mould includes mould, lower mould and side forms, go up mould, lower mould and side forms and all can regard as the matrix of burying underground of cooling water course, the cooling water course is including setting up the annular groove on the matrix, and the bottom of annular groove is equipped with semi-circular lower groove, and the embedded annular baffle that is equipped with of annular groove, the bottom surface of annular baffle are equipped with semi-circular upper groove, and semi-circular upper groove and semi-circular lower groove enclose relatively and form the cooling water channel, and the higher authority of annular baffle inlays and is equipped with annular cover plate, and annular cover plate and annular groove's upper end parallel and level, the interior outer bead of annular cover plate respectively with the interior bead welded fastening of annular groove upper end together, the annular cover plate is suppressed annular baffle in annular groove.

Preferably, a lower concave blind hole is formed in the middle of one side of a semicircular lower groove at the bottom of the annular groove, a corresponding upper concave blind hole is formed in the middle of one side of a semicircular upper groove in the bottom surface of the annular partition plate, the upper concave blind hole and the lower concave blind hole are relatively enclosed to form a water-proof pin hole, a water-proof pin is tightly matched in the water-proof pin hole, a water inlet hole penetrating through the annular partition plate and the annular cover plate is formed in one side of the water-proof pin, a water outlet hole penetrating through the annular partition plate and the annular cover plate is formed in the other side of the water-proof pin, and the water inlet hole and the water outlet hole are respectively connected with a water inlet interface and a water outlet interface; or the middle parts of the two opposite sides of the semicircular lower groove at the bottom of the annular groove are provided with lower concave blind holes, the middle parts of the two opposite sides of the semicircular upper groove at the bottom of the annular partition plate are provided with corresponding upper concave blind holes, the upper concave blind holes and the lower concave blind holes are relatively enclosed to form water-proof pin holes, water-proof pins are tightly matched in the water-proof pin holes, the two water-proof pins divide the cooling water channel into two sections, the two sides of one water-proof pin are provided with water inlet holes penetrating through the annular partition plate and the annular cover plate, the two sides of the other water-proof pin are provided with water outlet holes penetrating through the annular partition plate and the annular cover plate, and the water inlet holes and the water outlet holes are respectively connected with a water inlet interface and a water outlet interface.

Preferably, the diameter of the water stop pin is slightly larger than that of the cooling water channel, and the depths of the upper concave blind hole and the lower concave blind hole are slightly larger than half of the length of the water stop pin.

The manufacturing method of the cooling water channel embedded in the hub die comprises the following steps: the annular partition plate is pressed and embedded into the annular groove by utilizing a tool, so that the bottom surface of the annular partition plate is tightly attached to the bottom of the annular groove, a gap between the annular partition plate and the annular groove is avoided, the semicircular upper groove and the semicircular lower groove are relatively enclosed to form a cooling water channel, then the inner edge and the outer edge of the annular partition plate are fixed on the inner wall of the annular groove in a spot welding manner, and the welding spots are polished and ground after the tool is removed; pressing the annular cover plate, cleaning the annular groove, pressing and embedding the annular cover plate into the annular groove by using a tool so that the annular cover plate is tightly attached to the annular partition plate, then spot-welding the inner and outer edges of the annular cover plate on the inner and outer edges at the upper end of the annular groove respectively, and dismantling the tool after spot-welding is pre-fixed; heating the hub mould, putting the hub mould pre-fixed by spot welding into a heating furnace for heating, and keeping the temperature for 2 hours when the temperature rises to 400 ℃; welding the annular cover plate, taking out the hub mold from the heating furnace, continuously measuring the temperature of the hub mold by using an infrared temperature measuring gun, respectively welding and fixing the inner edge opening and the outer edge opening of the annular cover plate on the inner edge opening and the outer edge opening at the upper end of the annular groove when the temperature of the hub mold is reduced to between 250 ℃ and 300 ℃, forming a welding seam between the inner edge opening and the outer edge opening, and dismantling the tool after welding is finished; fifthly, carrying out tempering treatment, namely putting the welded hub mould into the heating furnace again for heating, and keeping the temperature for 1.5h when the temperature rises to 300 ℃; sixthly, cooling, turning off the heating furnace, naturally cooling the wheel hub mold in the heating furnace to room temperature, and taking out the wheel hub mold.

Preferably, in the step of the manufacturing method, when the inner and outer edges of the annular partition plate are fixed on the inner wall of the annular groove by spot welding, the welding points are symmetrically arranged along the diameter, the number of the welding points is two, and the distance between every two adjacent welding points is 45-60mm, preferably 50-55 mm.

Preferably, in the second step of the manufacturing method, when the inner and outer edges of the annular cover plate are respectively fixed on the inner and outer edges at the upper end of the annular groove in a spot welding manner, the welding spots are symmetrically arranged along the diameter, the number of the welding spots is even, and the distance between every two adjacent welding spots is 45-60mm, preferably 50-55 mm.

Preferably, in step four of the manufacturing method, when the annular cover plate is welded, the welding current is 110-.

The annular partition plate is additionally arranged in the cooling water channel, the semicircular upper groove on the bottom surface of the annular partition plate and the semicircular lower groove at the bottom of the annular groove are relatively enclosed to form a cooling water channel, the annular partition plate completely separates cooling water from the annular cover plate, and the cooling water cannot impact the annular cover plate in the use process, so that the influence of the cooling water on a welding seam part can be greatly reduced, and even if trace cooling water seeps out through the annular partition plate, the trace cooling water has low pressure and is quickly vaporized by the hub die in a high-temperature state, no impact is generated on the shape of the annular cover plate, and no influence is generated on the welding seam part; a water-proof pin is arranged between the bottom surface of the annular partition plate and the bottom of the annular groove, when the annular partition plate is pressed and embedded into the annular groove, the water-proof pin plays a role in positioning to prevent the annular partition plate from deviating and dislocating, the water-proof pin separates the cooling water in and out in the use process, the cooling effect is favorably improved, and the water-proof pin is tightly matched in the water-proof pin hole, so that the annular partition plate can be prevented from rotating due to impact of high-pressure cooling water, water inlet and outlet holes penetrating through the annular partition plate and the annular cover plate can be kept consistent, and the inlet and outlet of the cooling water are not influenced; by utilizing the thermodynamic principle, the welding process of the cooling water channel structure is reasonably improved, so that the performance of the welding seam part is more stable. The wheel hub die manufactured by the invention can delay the cracking of the cooling water channel and prolong the service life of the die. Through comparison experiments, the invention can meet the production life of 50000 times, does not generate water channel cracking phenomenon during production, and plays an important role in the production of the hub die and the improvement of the quality of the hub.

Drawings

FIG. 1 is a schematic structural view of a hub die of the present invention;

FIG. 2 is a schematic view of an assembly structure of the present invention in which a cooling water passage is buried in an upper mold;

FIG. 3 is a schematic view of a split structure of the cooling water channel embedded in the upper mold according to the present invention;

FIG. 4 is a schematic view of a structure shown in section A-A in FIG. 2;

FIG. 5 is a schematic view of a structure shown in section B-B in FIG. 3;

FIG. 6 is a schematic view of a larger annular diameter annular cover plate for the cooling water channel of the present invention;

FIG. 7 is a schematic view of a larger annular diameter partition in a cooling channel according to the present invention;

FIG. 8 is a schematic view of a smaller annular diameter annular cover plate for a cooling water channel according to the present invention;

FIG. 9 is a schematic view of a smaller annular diameter annular partition in a cooling channel according to the present invention.

In the figure, 1-an upper die, 2-a lower die, 3-a side die, 4-an annular groove, 5-an annular cover plate, 6-an annular partition plate, 7-a cooling water channel, 8-a water inlet interface, 9-a welding line, 10-a semicircular lower groove, 11-a semicircular upper groove, 12-an upper concave blind hole, 13-a lower concave blind hole, 14-a water-stop pin, 15-a water inlet hole and 16-a water outlet hole.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Example (b): referring to fig. 1, the hub mold of the present invention includes an upper mold, a lower mold and a side mold, and cooling water passages are embedded in the bodies of the upper mold, the lower mold and the side mold. Referring to fig. 2-9, taking the upper mold as an example, the cooling water channel includes an annular groove disposed on the parent body, a semicircular lower groove is disposed at the bottom of the annular groove, an annular partition plate is embedded in the annular groove, a semicircular upper groove is disposed at the bottom surface of the annular partition plate, the semicircular upper groove and the semicircular lower groove are relatively enclosed to form a cooling water channel, an annular cover plate is embedded on the annular partition plate, the annular cover plate is flush with the upper end of the annular groove, the inner and outer edges of the annular cover plate are respectively welded and fixed with the inner and outer edges at the upper end of the annular groove, and the annular cover plate presses the annular partition plate in the annular groove. The water-proof device comprises an annular groove, a water-proof pin and a water inlet pin, wherein a lower concave blind hole is arranged in the middle of one side of a semicircular lower groove at the bottom of the annular groove, a corresponding upper concave blind hole is arranged in the middle of one side of a semicircular upper groove at the bottom of the annular partition plate, the upper concave blind hole and the lower concave blind hole are relatively enclosed to form a water-proof pin hole, the water-proof pin hole is tightly matched with the water-proof pin, a water inlet hole penetrating through the annular partition plate and the annular cover plate is formed in one side of the water-proof pin, a water outlet hole penetrating through the annular partition plate and the annular cover plate is formed in the other side of the water-proof pin, and the water inlet hole and the water outlet hole are respectively connected with a water inlet interface and a water outlet interface; or the middle parts of the two opposite sides of the semicircular lower groove at the bottom of the annular groove are provided with lower concave blind holes, the middle parts of the two opposite sides of the semicircular upper groove at the bottom of the annular partition plate are provided with corresponding upper concave blind holes, the upper concave blind holes and the lower concave blind holes are relatively closed to form water-proof pin holes, water-proof pins are tightly matched in the water-proof pin holes and divide the cooling water channel into two sections, the two sides of one water-proof pin are provided with water inlet holes penetrating through the annular partition plate and the annular cover plate, the two sides of the other water-proof pin are provided with water outlet holes penetrating through the annular partition plate and the annular cover plate, and the water inlet holes and the water outlet holes are respectively connected with a water inlet interface and a water outlet interface (the water inlet interface is omitted in the figure for simplifying the figure). Preferably, the diameter of the water stop pin is slightly larger than that of the cooling water channel, and the depths of the upper concave blind hole and the lower concave blind hole are slightly larger than half of the length of the water stop pin.

The manufacturing method of the cooling water channel embedded in the hub die comprises the following steps: the annular partition plate is pressed and embedded into the annular groove by utilizing a tool, so that the bottom surface of the annular partition plate is tightly attached to the bottom of the annular groove, a gap between the annular partition plate and the annular groove is avoided, the semicircular upper groove and the semicircular lower groove are relatively enclosed to form a cooling water channel, then the inner edge and the outer edge of the annular partition plate are fixed on the inner wall of the annular groove in a spot welding manner, and the welding spots are polished and ground after the tool is removed; pressing the annular cover plate, cleaning the annular groove, pressing and embedding the annular cover plate into the annular groove by using a tool so that the annular cover plate is tightly attached to the annular partition plate, then spot-welding the inner and outer edges of the annular cover plate on the inner and outer edges at the upper end of the annular groove respectively, and dismantling the tool after spot-welding is pre-fixed; heating the hub mould, putting the hub mould pre-fixed by spot welding into a heating furnace for heating, and keeping the temperature for 2 hours when the temperature rises to 400 ℃; welding the annular cover plate, taking out the hub mold from the heating furnace, continuously measuring the temperature of the hub mold by using an infrared temperature measuring gun, respectively welding and fixing the inner edge opening and the outer edge opening of the annular cover plate on the inner edge opening and the outer edge opening at the upper end of the annular groove when the temperature of the hub mold is reduced to between 250 ℃ and 300 ℃, forming a welding seam between the inner edge opening and the outer edge opening, and dismantling the tool after welding is finished; fifthly, carrying out tempering treatment, namely putting the welded hub mould into the heating furnace again for heating, and keeping the temperature for 1.5h when the temperature rises to 300 ℃; sixthly, cooling, turning off the heating furnace, naturally cooling the wheel hub mold in the heating furnace to room temperature, and taking out the wheel hub mold.

Preferably, in the step of the manufacturing method, when the inner and outer edges of the annular partition plate are fixed on the inner wall of the annular groove by spot welding, the welding points are symmetrically arranged along the diameter, the number of the welding points is two, and the distance between every two adjacent welding points is 45-60mm, preferably 50-55 mm.

Preferably, in the second step of the manufacturing method, when the inner and outer edges of the annular cover plate are respectively fixed on the inner and outer edges at the upper end of the annular groove in a spot welding manner, the welding spots are symmetrically arranged along the diameter, the number of the welding spots is even, and the distance between every two adjacent welding spots is 45-60mm, preferably 50-55 mm.

Preferably, in step four of the manufacturing method, when the annular cover plate is welded, the welding current is 110-.

The annular partition plate is additionally arranged in the cooling water channel, the semicircular upper groove on the bottom surface of the annular partition plate and the semicircular lower groove at the bottom of the annular groove are relatively enclosed to form a cooling water channel, the annular partition plate completely separates cooling water from the annular cover plate, and the cooling water cannot impact the annular cover plate in the use process, so that the influence of the cooling water on a welding seam part can be greatly reduced, and even if trace cooling water seeps out through the annular partition plate, the trace cooling water has low pressure and is quickly vaporized by the hub die in a high-temperature state, no impact is generated on the shape of the annular cover plate, and no influence is generated on the welding seam part; a water-proof pin is arranged between the bottom surface of the annular partition plate and the bottom of the annular groove, when the annular partition plate is pressed and embedded into the annular groove, the water-proof pin plays a role in positioning to prevent the annular partition plate from deviating and dislocating, the water-proof pin separates the cooling water in and out in the use process, the cooling effect is favorably improved, and the water-proof pin is tightly matched in the water-proof pin hole, so that the annular partition plate can be prevented from rotating due to impact of high-pressure cooling water, water inlet and outlet holes penetrating through the annular partition plate and the annular cover plate can be kept consistent, and the inlet and outlet of the cooling water are not influenced; by utilizing the thermodynamic principle, the welding process of the cooling water channel structure is reasonably improved, so that the performance of the welding seam part is more stable. The wheel hub die manufactured by the invention can delay the cracking of the cooling water channel and prolong the service life of the die. Through comparison experiments, the invention can meet the production life of 50000 times, does not generate water channel cracking phenomenon during production, and plays an important role in the production of the hub die and the improvement of the quality of the hub.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical spirit of the present invention should be considered to be within the scope of the present invention.