Planet wheel forming equipment for wind power equipment

Abstract

The utility model provides planet wheel forming equipment for wind power equipment, and relates to the technical field of wind power equipment forging. Comprising a die body, a first punch, a second punch, an ejection device, a first driving device and a second driving device. The die body is provided with a grinding tool groove, the second punch is arranged above the grinding tool groove, the first punch is arranged below the grinding tool groove, the ejection equipment is arranged on the side, away from the die body, of the first punch, and the first driving equipment is used for driving the ejection equipment to reciprocate in the vertical direction. The second driving equipment is used for driving the first punch to reciprocate in the vertical direction; a rotating piece is arranged at the top end of the ejection equipment. By the adoption of the die forging device, on the basis of the combined forging mode of die forging and free forging, the planet gear can be demolded from the die more conveniently.

Description

Technical Field

[0001] This application relates to the technical field of forging of wind power equipment, and particularly relates to a planetary gear forming device for wind power equipment. Background Art

[0002] Especially for the production and manufacturing of planetary gears of large wind turbines, free forging is generally used in the prior art, which has problems such as large machining allowance of forgings and low density.

[0003] For the planetary gears formed by closed-die forging, after forging, the forgings are directly ejected by a ejector rod. It is rather troublesome to take the forged products with ordinary forging dies, which is not convenient for the staff to quickly take out the forged products, increases the damage to the forged products, and reduces the qualified rate of the forged products.

[0004] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present disclosure. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0005] The main purpose of this application is to provide a planetary gear forming device for wind power equipment, which can be more convenient for the planetary gear to be demolded from the mold on the basis of the combined die forging and free forging method.

[0006] To solve the foregoing technical problems, this application provides a planetary gear forming device for wind power equipment, including a mold body, a first punch, a second punch, an ejection device, a first driving device, and a second driving device;

[0007] The mold body is provided with a mold groove, the second punch is arranged above the mold groove, the first punch is arranged below the mold groove, and the ejection device is arranged on the side of the first punch away from the mold body.

[0008] The first driving device is used to drive the ejection device to reciprocate in the vertical direction, and the second driving device is used to drive the first punch to reciprocate in the vertical direction;

[0009] A rotating member is provided at the top of the ejection device.

[0010] Optionally, in some embodiments of the present utility model, the rotating member is a plurality of balls arranged at intervals.

[0011] Optionally, in some embodiments of the present utility model, a ball is provided at the center position of the top of the ejection device, and eight balls are evenly arranged at intervals along the circumferential direction of the top of the ejection device.

[0012] Optionally, in some embodiments of the present utility model, the above-mentioned mold body includes an upper mold and a lower mold. The upper mold is detachably arranged on the top of the lower mold. The first punch, the ejection device, and the first driving device are all arranged on the lower mold. The mold groove penetrates through the upper mold, and the second punch is arranged above the upper mold.

[0013] Optionally, in some embodiments of the present utility model, the above-mentioned first punch includes a first base and a first limiting boss. The diameter length of the first base is the same as the outer diameter length of the planetary gear to be formed, and the diameter length of the first limiting boss is the same as the inner diameter length of the planetary gear to be formed.

[0014] Optionally, in some embodiments of the present utility model, the above-mentioned second punch includes a second base and a second limiting boss. The diameter length of the first base is the same as the outer diameter length of the planetary gear to be formed, the diameter length of the second limiting boss is the same as the inner diameter length of the planetary gear to be formed, and the sum of the lengths of the first limiting boss and the second limiting boss is the same as the axial length of the planetary gear to be formed.

[0015] Optionally, in some embodiments of the present utility model, the diameter lengths of the ends of the above-mentioned first limiting boss and the second limiting boss close to the planetary gear to be formed are smaller than those of the other ends.

[0016] Optionally, in some embodiments of the present utility model, a plurality of tooth grooves are evenly spaced in the above-mentioned mold groove, and the tooth grooves are inclined with respect to the horizontal plane.

[0017] Optionally, in some embodiments of the present utility model, the above-mentioned first driving device and the second driving device are both hydraulic cylinders.

[0018] Optionally, in some embodiments of the present utility model, hanging ears are arranged on the outer side of the above-mentioned mold body.

[0019] The beneficial effects that this application can achieve.

[0020] A planetary gear forming device for wind power equipment proposed in an embodiment of this application includes a mold body, a first punch, a second punch, an ejection device, a first driving device, and a second driving device; the mold body is provided with a mold groove, the second punch is arranged above the mold groove, the first punch is arranged below the mold groove, the ejection device is arranged on the side of the first punch away from the mold body, the first driving device is used to drive the ejection device to reciprocate in the vertical direction, and the second driving device is used to drive the first punch to reciprocate in the vertical direction; a rotating member is arranged at the top of the ejection device.

[0021] The mold body of this embodiment is used to place the heated blank. The second punch is driven by the second driving device to extrude the center position of the blank, so that the second punch can pass through the through hole reserved on the blank and expand and extrude the through hole, making the blank fit tightly against the edge of the mold groove, thereby improving the density of the formed planetary gear. At the same time, the top of the blank can be extruded by the second punch, making the top of the formed planetary gear flat and having a better filling effect.

[0022] After the second punch completes the stamping action, the ejection device together with the first punch is driven by the first driving device to move, so that the first punch extrudes from the bottom of the blank. On the one hand, the through hole can be further expanded and extruded, and on the other hand, the bottom of the blank can be extruded, making the bottom of the formed planetary gear flat.

[0023] When the forging of the blank is completed, the second punch is removed, and the ejection device together with the first punch is further driven by the first driving device to move, so that the forged planetary gear moves upward relative to the mold body, thereby realizing the demolding of the planetary gear.

[0024] By providing a rotating part at the top of the ejection device, when driving the ejection device to move, the first punch can drive the planetary gear to rotate relative to the mold body through the rotating part, thereby overcoming the technical problem that the tooth groove is inclined relative to the horizontal plane, reducing the damage to the forged product, improving the qualified rate of the forged product, and making it more convenient for the planetary gear to be demolded from the mold. Description of the Drawings

[0025] Figure 1 It is a cross-sectional view when the second punch of the planetary gear forming device for wind power equipment provided by the embodiment of the present invention is working;

[0026] Figure 2 It is a cross-sectional view when the first punch of the planetary gear forming device for wind power equipment provided by the embodiment of the present invention is working;

[0027] Figure 3 It is a front view of the ejection device provided by the embodiment of the present invention.

[0028] Reference Signs: 1 - Mold body, 11 - Upper mold, 12 - Lower mold, 13 - Mold groove, 14 - Hanging ear, 2 - First punch, 21 - First base, 22 - First limiting boss, 3 - Second punch, 31 - Second base, 32 - Second limiting boss, 4 - Ejection device, 5 - First driving device, 6 - Second driving device, 7 - Ball.

[0029] The realization of the purpose of this application, functional features and advantages will be further described in conjunction with the embodiments and with reference to the drawings. Detailed Embodiments

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indication will also change accordingly.

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] The following will further elaborate on the present utility model in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the text of the specification.

[0035] Planet gears in the prior art can usually be forged using free forging or directly using die forging.

[0036] However, planet gears forged using free forging have problems such as large machining allowances and low density of forgings.

[0037] For the planetary gears formed by die forging, especially the large gears applicable to the wind power field, there is a problem of inconvenient demolding.

[0038] Now, based on the large-sized planetary gears required for wind power generation equipment, a composite process that reduces the required steel for forming, reduces the machining allowance, and has a lower production cost is designed by combining free forging and die forging. Specifically:

[0039] 1. According to the size, volume weight of the planetary gear and the material utilization rate of the entire manufacturing process, a hollow steel ingot is designed. Qualified molten steel is smelted and the hollow steel ingot is cast.

[0040] 2. The hollow steel ingot is heated to 1200 °C, and after heat preservation, the temperature of each part of the steel ingot is made uniform, and then it is taken out of the furnace. It is upset and then drawn out by introducing a core rod for forging. Ensure that the inner and outer surfaces of the tube forging are smooth and the dimensions are uniform.

[0041] 3. After the drawing forging is completed, immediately use flame cutting to remove the metallurgical impurity aggregation areas at both ends of the forging blank to ensure the quality of the forging blank body and accurately control the surface quality of the forging blank.

[0042] 4. After the blank is heated to 1200 °C for temperature uniformity, it is sent into a special mold, and then a punch is placed. Then, the punch is advanced through the punch to expand and extrude the blank until the punch passes through the prefabricated through hole. Then, spin forming is performed on the upper end surface of the workpiece to eliminate the "bulging" and "insufficient filling" phenomena on the end surface, and the die forging forming is completed.

[0043] In step 4, since the tooth grooves of some planetary gears are inclined relative to the horizontal plane, it is not convenient for the staff to quickly take out the forged products, which increases the damage to the forged products and reduces the qualified rate of the forged products.

[0044] To achieve the above object,

[0045] Referring to Figure 1 - Figure 2 , an embodiment of the present application provides a planetary gear forming device for a wind power equipment, including a mold body 1, a first punch 2, a second punch 3, an ejection device 4, a first driving device 5 and a second driving device 6;

[0046] The mold body 1 is provided with a mold groove 13, the second punch 3 is arranged above the mold groove 13, the first punch 2 is arranged below the mold groove 13, and the ejection device 4 is arranged on the side of the first punch 2 away from the mold body 1,

[0047] The first driving device 5 is used to drive the ejection device 4 to reciprocate in the vertical direction, and the second driving device 6 is used to drive the first punch 2 to reciprocate in the vertical direction;

[0048] A rotating member is provided at the top end of the ejection device 4.

[0049] The mold body 1 of this embodiment is used to place the heated blank. The second punch 3 is driven by the second driving device 6 to extrude the center position of the blank, so that the second punch 3 can pass through the through hole reserved on the blank, and the through hole is reamed and extruded, so that the blank is closely attached to the edge of the mold groove 13, thereby improving the density of the formed planet gear. At the same time, the top of the blank can be extruded by the second punch 3, so that the top of the formed planet gear is flat and the filling effect is better.

[0050] After the second punch 3 completes the stamping action, the ejection device 4 together with the first punch 2 is driven by the first driving device 5 to move, so that the first punch 2 extrudes from the bottom of the blank. On the one hand, the through hole can be further reamed and extruded, and on the other hand, the bottom of the blank can be extruded, so that the bottom of the formed planet gear is flat.

[0051] When the blank die forging is completed, the second punch 3 is removed, and the ejection device 4 together with the first punch 2 is further driven by the first driving device 5 to move, so that the forged planet gear moves upward relative to the mold body 1, thereby realizing the demolding of the planet gear.

[0052] By providing a rotating member at the top of the ejection device 4, when the ejection device 4 is driven to move, the first punch 2 can drive the planet gear to rotate relative to the mold body 1 through the rotating member, thereby overcoming the technical problem that the tooth groove is inclined relative to the horizontal plane, reducing the damage to the forged product, improving the qualified rate of the forged product, and making it more convenient for the planet gear to be demolded from the mold.

[0053] Optionally, both the first driving device 5 and the second driving device 6 of this embodiment are hydraulic cylinders. Hanging ears 14 are provided on the outer side of the mold body 1 to facilitate the movement of the mold body.

[0054] Refer to Figure 3 , as an alternative embodiment, the rotating member of this embodiment is a plurality of balls 7 arranged at intervals.

[0055] By providing the balls 7 at the top of the ejection device 4, when the first driving device 5 drives the ejection device 4 to move, the first punch 2 together with the planet gear can rotate relative to the mold body 1.

[0056] It should be noted that setting the rotating member as a ball in this embodiment is only a preferred embodiment of this embodiment. In other embodiments, structures such as a rotating shaft and a bearing can also be used to implement the rotating member.

[0057] Specifically, a ball 7 is provided at the center position of the top of the ejection device 4 of this embodiment, and eight balls 7 are evenly arranged at intervals along the circumference of the top of the ejection device 4.

[0058] By arranging nine ball bearings 7, the pressure on the top of the ejection device 4 during die forging can be effectively reduced, thereby effectively extending the service life of the ejection device 4.

[0059] As an alternative embodiment, the mold body 1 of this embodiment includes an upper mold 11 and a lower mold 12. The upper mold 11 is detachably arranged on the top of the lower mold 12. The first punch 2, the ejection device 4, and the first driving device 5 are all arranged on the lower mold 12. The bottom of the lower mold 12 is penetrated by the first driving device 5. A groove is provided on the top of the lower mold 12. Most of the first punch 2 and the ejection device 4 can just fit into the groove. The mold groove 13 is axially arranged through the upper mold 11. The second punch 3 is arranged above the upper mold 11. The first punch 2, the second punch 3, and the mold groove 13 are coaxially arranged.

[0060] Optionally, a plurality of tooth grooves are evenly spaced in the mold groove 13 of this embodiment, and the tooth grooves are inclined with respect to the horizontal plane.

[0061] As an alternative embodiment, the first punch 2 of this embodiment includes a first base 21 and a first limiting boss 22. The diameter length of the first base 21 is the same as the outer diameter length of the to-be-formed planet gear, and the diameter length of the first limiting boss 22 is the same as the inner diameter length of the to-be-formed planet gear.

[0062] Wherein, both the first base 21 and the ejection device 4 can be completely embedded in the groove of the lower mold 12.

[0063] The second punch 3 includes a second base 31 and a second limiting boss 32. The diameter length of the first base 21 is the same as the outer diameter length of the to-be-formed planet gear, and the diameter length of the second limiting boss 32 is the same as the inner diameter length of the to-be-formed planet gear. The sum of the lengths of the first limiting boss 22 and the second limiting boss 32 is less than the axial length of the to-be-formed planet gear.

[0064] As an alternative embodiment, the diameter lengths of the ends of the first limiting boss 22 and the second limiting boss 32 close to the to-be-formed planet gear are smaller than those of the other ends respectively. So that the first limiting boss 22 and the second limiting boss 32 can be better inserted into the through holes reserved in the blank.

[0065] Optionally, the sides of the first limiting boss 22 and the second limiting boss 32 close to each other are both chamfered.

[0066] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, it is obvious that this application is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of this application, this application can be implemented in other specific forms.

Claims

1. A planetary gear forming device for wind power equipment, characterized in that: It includes a die body, a first punch, a second punch, an ejection device, a first drive device and a second drive device; The mold body is provided with a mold groove, the second punch is arranged above the mold groove, the first punch is arranged below the mold groove, and the ejection device is arranged on a side of the first punch away from the mold body. The first driving device is used to drive the ejection device to reciprocate in a vertical direction, and the second driving device is used to drive the first punch to reciprocate in a vertical direction; A rotating part is arranged at the top of the ejection device.

2. The planetary gear forming device for wind power equipment according to claim 1, characterized in that: The rotating member is a plurality of balls arranged at intervals.

3. The planetary gear forming device for wind power equipment according to claim 2, characterized in that: A ball is arranged at the center of the top of the ejection device, and eight balls are evenly spaced along the circumference of the top of the ejection device.

4. The planetary gear forming device for wind power equipment according to claim 1, characterized in that: The mold body includes an upper mold and a lower mold, the upper mold is detachably arranged on the top of the lower mold, the first punch, the ejection device and the first driving device are all arranged on the lower mold, the mold groove passes through the upper mold, and the second punch is arranged above the upper mold.

5. The planetary gear forming device for wind power equipment according to claim 1, characterized in that: The first punch includes a first base and a first limiting boss, the diameter length of the first base is the same as the outer diameter length of the planetary gear to be formed, and the diameter length of the first limiting boss is the same as the inner diameter length of the planetary gear to be formed.

6. The planetary gear forming device for wind power equipment according to claim 5, characterized in that: The second punch includes a second base and a second limiting boss, the diameter length of the first base is the same as the outer diameter length of the planetary wheel to be formed, the diameter length of the second limiting boss is the same as the inner diameter length of the planetary wheel to be formed, and the sum of the lengths of the first limiting boss and the second limiting boss is greater than the axial length of the planetary wheel to be formed.

7. The planetary gear forming device for wind power equipment according to claim 6, characterized in that: The diameter length of one end of the first limiting boss and the second limiting boss close to the planetary gear to be formed is smaller than the diameter length of the other end.

8. The planetary gear forming device for wind power equipment according to claim 1, characterized in that: A plurality of tooth grooves are evenly spaced in the mold groove, and the tooth grooves are inclined to the horizontal plane.

9. The planetary gear forming device for wind power equipment according to claim 1, characterized in that: The first driving device and the second driving device are both hydraulic cylinders.

10. The planetary gear forming device for wind power equipment according to claim 1, characterized in that: A hanging ear is arranged on the outer side of the mold body.

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