A kind of weight loss hole integrated forming helical gear manufacturing die

Abstract

The utility model relates to powder metallurgy part manufacturing technical field, concretely is a kind of weight-reducing hole integrated forming helical gear manufacturing die, including upper punch plate, middle die plate, lower punch plate, the middle part of middle die plate is equipped with helical tooth slot hole, the upper of middle die plate is equipped with upper punch plate, the lower end of upper punch plate is rotatably connected upper punch body, the lower of middle die plate is equipped with lower punch plate, the upper end of lower punch plate is rotatably connected lower punch body, the outer wall of upper punch body and lower punch body is equipped with the helical tooth that is matched with helical tooth slot hole, the lower of lower punch plate is equipped with core rod pressing plate, the upper end of core rod pressing plate is rotatably connected core rod, there is weight-reducing punch plate between lower punch plate and core rod pressing plate, the upper end of core rod sequentially passes weight-reducing punch plate, lower punch plate and then passes the core rod perforation that the lower punch body is equipped with, the core rod that passes weight-reducing punch plate is uniformly distributed weight-reducing rod in circumferential direction, the lower end of weight-reducing rod is rotatably connected with weight-reducing punch plate, with Simple structure, good forming effect, high forming efficiency, low manufacturing cost, long service life of helical gear and so on.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy parts manufacturing technology, specifically a mold for integrally forming a weight-reducing hole helical gear with simple structure, good forming effect, high forming efficiency, low manufacturing cost, and long service life of helical gears. Background Technology

[0002] As is well known, powder metallurgy helical gears are a standard product in powder metallurgy parts, accounting for more than 60% of the usage in the entire high-pressure car wash machine industry, and their design directly affects the quality of the product. Therefore, a reasonable design is very important for service life.

[0003] Helical gears are used in harsh conditions with high temperature and high speed. Currently, in order to reduce the counterweight of helical gears, it is generally necessary to open weight-reducing holes on the end face of the helical gear. At present, the weight-reducing holes are usually opened by cutting at least four symmetrical weight-reducing holes evenly distributed around the circumference of the end face of the helical gear after it has been formed. However, due to the error of cutting, the center of the circle formed by the center of the weight-reducing hole is not on the center of the helical gear. This will cause the stress strength of the helical teeth on the side of the helical gear to be inconsistent, which will make the helical gear prone to deformation and affect its service life. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a mold for making helical gears with integrated weight-reducing holes that is simple in structure, has good molding effect, high molding efficiency, low manufacturing cost, and long service life of helical gears.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A mold for manufacturing helical gears with integrated weight-reducing holes includes an upper punch plate, a middle template, and a lower punch plate. The middle template has a helical tooth groove in its center. An upper punch plate is positioned above the middle template, with its lower end rotatably connected to an upper punch body. A lower punch plate is positioned below the middle template, with its upper end rotatably connected to a lower punch body. The outer walls of both the upper and lower punch bodies have helical teeth that mate with the helical tooth groove. A mandrel pressure plate is positioned below the lower punch plate, with its upper end... Rotary connecting mandrel, a weight-reducing punch plate is provided between the lower punch plate and the mandrel pressure plate, the upper end of the mandrel passes through the weight-reducing punch plate and the lower punch plate in sequence and then through the mandrel through hole provided on the lower punch body, weight-reducing rods are evenly distributed in the circumference of the mandrel passing through the weight-reducing punch plate, the lower end of the weight-reducing rod is rotatably connected to the weight-reducing punch plate, the upper end of the weight-reducing rod passes through the lower punch plate and then through the weight-reducing through hole provided on the lower punch body, the upper punch body, middle template, lower punch body, mandrel and weight-reducing rod are closed to form a helical gear forming cavity.

[0006] The lower punch plate of this utility model is provided with a clearance hole for the weight reduction plate and the core rod to pass through.

[0007] The upper punch body of this utility model is fastened to the upper punch plate by the upper punch cover. The upper punch cover is provided with a first T-shaped slot. The upper punch body is T-shaped. The upper punch cover and the upper punch body are fixedly connected. The upper end of the upper punch body is rotatably connected to the upper punch plate through a rotating part. The lower end of the upper punch body passes through the first T-shaped slot of the upper punch cover and exits through the first T-shaped slot.

[0008] The lower end face of the upper punch of this utility model is provided with a burr avoidance protrusion, and the position of the burr avoidance protrusion corresponds to that of the weight reduction bar.

[0009] The upper punch of this invention has a core slot in the middle, and after the mold is closed, the upper end of the core is inserted into the core slot.

[0010] The lower punch body of this utility model is fastened to the lower punch plate by the lower punch cover. The lower punch cover is provided with a second T-shaped slot. The lower punch body is T-shaped. The lower punch cover and the lower punch body are fixedly connected. The lower end of the lower punch body is rotatably connected to the lower punch plate through a rotating component. The upper end of the lower punch body passes through the second T-shaped slot of the lower punch cover and exits through the second T-shaped slot.

[0011] The mandrel pressure plate of this utility model is fastened to the mandrel pressure plate by the mandrel pressure cover. The mandrel pressure cover is provided with a third T-shaped slot. The mandrel is T-shaped. The mandrel pressure cover is fixedly connected to the mandrel pressure plate. The lower end of the mandrel is rotatably connected to the mandrel pressure plate via a rotating component. The upper end of the mandrel passes through the third T-shaped slot of the mandrel pressure cover and exits through the third T-shaped slot.

[0012] The weight-reducing punch plate of this utility model is fastened to the weight-reducing punch plate by a weight-reducing cover. The weight-reducing cover is provided with a fourth T-shaped slot. The weight-reducing rod is T-shaped. The weight-reducing cover is fixedly connected to the weight-reducing punch plate. The lower end of the weight-reducing rod is rotatably connected to the weight-reducing punch plate via a rotating component. The upper end of the weight-reducing rod passes through the fourth T-shaped slot of the weight-reducing cover and exits through the fourth T-shaped slot.

[0013] The rotating component described in this utility model is a bearing or spiral plate that can rotate automatically, and the upper punch, lower punch, weight reduction bar, and mandrel are rotated by the bearing or spiral plate.

[0014] The spiral blade of this invention has a spiral groove on its surface. The surface of the spiral blade is fixed to the upper punch plate, the lower punch plate, the weight reduction punch plate, and the mandrel pressure plate. A spiral block is provided on the surface of the spiral groove. The spiral block rotates on the spiral groove. The spiral block is connected to the end face. The rotation of the spiral block in the spiral groove realizes the rotation of the upper punch body, the lower punch body, the weight reduction rod, and the mandrel.

[0015] This utility model, due to the above-mentioned structure, has the advantages of simple structure, good molding effect, high molding efficiency, low manufacturing cost, and long service life of helical gears. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 yes Figure 1 A schematic diagram of the structure of the upper punch plate and the upper punch body.

[0018] Figure 3 yes Figure 1 A schematic diagram of the mold-closed structure of the central template, lower punch plate, lower punch body, weight-reducing punch plate, weight-reducing rod, mandrel pressure plate, and mandrel.

[0019] Figure 4 yes Figure 1 A schematic diagram of the structure of the template.

[0020] Figure 5 yes Figure 1 A schematic diagram of the structure of the middle and lower punch plates and the lower punch body. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings: As shown in the attached figure, a mold for manufacturing helical gears with integrated weight-reducing holes includes an upper punch plate 1, a middle template 2, and a lower punch plate 3. The middle template 2 has a helical tooth groove 4 in its center. The upper punch plate 1 is located above the middle template 2, and its lower end is rotatably connected to an upper punch body 5. The lower punch plate 3 is located below the middle template 2, and its upper end is rotatably connected to a lower punch body 6. The outer walls of the upper punch body 5 and the lower punch body 6 are provided with helical teeth that mate with the helical tooth groove 4. A mandrel pressure plate 7 is located below the lower punch plate 3, and its upper end is rotatably connected to... A weight-reducing punch 9 is provided between the mandrel 8, the lower punch 3, and the mandrel pressure plate 7. The upper end of the mandrel 8 passes through the weight-reducing punch 9 and the lower punch 3 in sequence, and then passes through the mandrel through hole 14 provided on the lower punch body 6. Weight-reducing rods 10 are evenly distributed in the circumferential direction of the mandrel 8 that passes through the weight-reducing punch 9. The lower end of the weight-reducing rod 10 is rotatably connected to the weight-reducing punch 9. The upper end of the weight-reducing rod 10 passes through the lower punch 3 and then passes through the weight-reducing through hole 11 provided on the lower punch body 6. After the upper punch body 5, the middle template 2, the lower punch body 6, the mandrel 8, and the weight-reducing rod 10 are closed, a helical gear forming cavity 12 is formed.

[0022] Furthermore, the lower punch plate 3 is provided with a clearance hole 13, through which the weight reduction plate and the core rod 8 pass.

[0023] Furthermore, the upper punch 5 is fastened to the upper punch plate 1 via the upper punch cover 15. The upper punch cover 15 is provided with a first T-shaped slot 16. The upper punch 5 is T-shaped. The upper punch cover 15 is fixedly connected to the upper punch 5. The upper end of the upper punch 5 is rotatably connected to the upper punch plate 1 via the rotating member 17. The lower end of the upper punch 5 passes through the first T-shaped slot 16 of the upper punch cover 15 and exits through the first T-shaped slot 16.

[0024] Furthermore, the lower end face of the upper punch 5 is provided with a burr avoidance protrusion 18, and the burr avoidance protrusion 18 corresponds to the position of the weight reduction bar 10.

[0025] Furthermore, the upper punch 5 is provided with a mandrel slot 19 in the middle, and after the mold is closed, the upper end of the mandrel 8 is inserted into the mandrel slot 19.

[0026] Furthermore, the lower punch 6 is fastened to the lower punch plate 3 via the lower punch cover 20. The lower punch cover 20 is provided with a second T-shaped slot 21. The lower punch 6 is T-shaped. The lower punch cover 20 is fixedly connected to the lower punch 6. The lower end of the lower punch 6 is rotatably connected to the lower punch plate 3 via the rotating member 17. The upper end of the lower punch 6 passes through the second T-shaped slot 21 of the lower punch cover 20 and exits through the second T-shaped slot 21.

[0027] Furthermore, the mandrel pressure plate 7 is fastened to the mandrel pressure plate 7 via the mandrel pressure cover 22. The mandrel pressure cover 22 is provided with a third T-shaped slot 23. The mandrel 8 is T-shaped. The mandrel pressure cover 22 is fixedly connected to the mandrel pressure plate 7. The lower end of the mandrel 8 is rotatably connected to the mandrel pressure plate 7 via the rotating part 17. The upper end of the mandrel 8 passes through the third T-shaped slot 23 of the mandrel pressure cover 22 and exits through the third T-shaped slot 23.

[0028] Furthermore, the weight-reducing punch plate 9 is fastened to the weight-reducing punch plate 9 via the weight-reducing pressure cover 24. The weight-reducing pressure cover 24 is provided with a fourth T-shaped slot 25. The weight-reducing rod 10 is T-shaped. The weight-reducing pressure cover 24 is fixedly connected to the weight-reducing punch plate 9. The lower end of the weight-reducing rod 10 is rotatably connected to the weight-reducing punch plate 9 via the rotating part 17. The upper end of the weight-reducing rod 10 passes through the fourth T-shaped slot 25 of the weight-reducing pressure cover 24 and exits through the fourth T-shaped slot 25.

[0029] Furthermore, the rotating component 17 is a bearing or spiral plate that can rotate automatically, and the upper punch 5, lower punch 6, weight reduction bar 10 and core bar 8 are rotated by the bearing or spiral plate.

[0030] Furthermore, the spiral blade has a spiral groove on its surface, and the spiral blade is fixed to the upper punch plate 1, the lower punch plate 3, the weight reduction punch plate 9, and the mandrel pressure plate 7 respectively. The spiral groove has a spiral block on its surface, and the spiral block rotates on the spiral groove. The spiral block is connected to the end face respectively, and the spiral block rotates in the spiral groove to realize the rotation of the upper punch 5, the lower punch 6, the weight reduction rod 10, and the mandrel 8.

[0031] In use, the upper punch 1, lower punch 3, weight-reducing punch 9, and mandrel pressure plate 7 are respectively fixed on different drive arms of the press, and the middle template 2 is fixed on the press's fixed base. During the molding process, the lower punch 3, weight-reducing punch 9, and mandrel pressure plate 7, under the action of the drive wall, drive the lower punch 6, weight-reducing rod 10, and mandrel 8 to insert into the middle template 2. After the helical tooth groove 4 of the middle template 2, the lower punch 6, mandrel 8, and weight-reducing rod 10 are closed, a helical gear forming cavity 12 is formed. Then, metallurgical powder is filled into the helical gear forming cavity 12. Then, under the action of the drive wall, the upper punch 1 drives the upper punch 5 to move down into the helical gear forming cavity 12 to extrude and form the metallurgical powder. Since the formed product is a helical gear... Therefore, during the downward and upward movement of the upper punch 5, it rotates along with the inner wall of the helical tooth groove 4. During the downward and upward movement of the lower punch 6, it also rotates along with the inner wall of the helical tooth groove 4. During the rotation of the lower punch 6, it drives the weight-reducing rod 10 and the core rod 8 to rotate, thereby realizing the integral molding of the helical gear with the weight-reducing hole. In this process, there is no need to cut the weight-reducing hole. Moreover, the center of the circle formed by the center of the weight-reducing hole coincides with the center of the circle formed by the core rod 8, ensuring that the stress strength on the circumference of the helical gear is consistent, thereby increasing the service life of the helical gear. Due to the above structure, this utility model has the advantages of simple structure, good molding effect, high molding efficiency, low manufacturing cost, and long service life of the helical gear.

Claims

1. A mold for manufacturing helical gears with an integrally formed weight-reducing hole, comprising an upper punch plate, a middle template, and a lower punch plate, characterized in that... The middle template has a helical toothed groove in the middle. An upper punch plate is provided above the middle template. The lower end of the upper punch plate is rotatably connected to the upper punch body. A lower punch plate is provided below the middle template. The upper end of the lower punch plate is rotatably connected to the lower punch body. The outer walls of the upper and lower punch bodies are provided with helical teeth that mate with the helical toothed groove. A mandrel pressure plate is provided below the lower punch plate. The upper end of the mandrel pressure plate is rotatably connected to the mandrel. A weight-reducing punch plate is provided between the lower punch plate and the mandrel pressure plate. The upper end of the mandrel passes through the weight-reducing punch plate and the lower punch plate in sequence, and then passes through the mandrel through hole provided on the lower punch body. Weight-reducing rods are evenly distributed in the circumference of the mandrel passing through the weight-reducing punch plate. The lower end of the weight-reducing rod is rotatably connected to the weight-reducing punch plate. The upper end of the weight-reducing rod passes through the lower punch plate and then passes through the weight-reducing through hole provided on the lower punch body. After the upper punch body, middle template, lower punch body, mandrel, and weight-reducing rods are closed, a helical gear forming cavity is formed.

2. The mold for manufacturing a helical gear with an integrally formed weight-reducing hole as described in claim 1, characterized in that... The lower punch plate is provided with a clearance hole for the weight reduction plate and the core rod to pass through.

3. The mold for manufacturing a helical gear with an integrally formed weight-reducing hole according to claim 1, characterized in that... The upper punch body is fastened to the upper punch plate by the upper punch cover. The upper punch cover is provided with a first T-shaped slot. The upper punch body is T-shaped. The upper punch cover and the upper punch body are fixedly connected. The upper end of the upper punch body is rotatably connected to the upper punch plate via a rotating component. The lower end of the upper punch body passes through the first T-shaped slot of the upper punch cover and exits through the first T-shaped slot.

4. The mold for manufacturing a helical gear with an integrally formed weight-reducing hole according to claim 1, characterized in that... The lower end face of the upper punch is provided with a burr avoidance boss, and the position of the burr avoidance boss corresponds to that of the weight reduction bar.

5. The mold for manufacturing a helical gear with an integrally formed weight-reducing hole according to claim 1, characterized in that... The upper punch body is provided with a core rod slot in the middle, and after the mold is closed, the upper end of the core rod is inserted into the core rod slot.

6. The mold for manufacturing a helical gear with an integrally formed weight-reducing hole according to claim 1, characterized in that... The lower punch body is fastened to the lower punch plate by the lower punch cover. The lower punch cover is provided with a second T-shaped slot. The lower punch body is T-shaped. The lower punch cover and the lower punch body are fixedly connected. The lower end of the lower punch body is rotatably connected to the lower punch plate via a rotating component. The upper end of the lower punch body passes through the second T-shaped slot of the lower punch cover and exits through the second T-shaped slot.

7. The mold for manufacturing a helical gear with an integrally formed weight-reducing hole according to claim 1, characterized in that... The mandrel pressure plate is fastened to the mandrel pressure plate by the mandrel pressure cover. The mandrel pressure cover is provided with a third T-shaped slot. The mandrel is T-shaped. The mandrel pressure cover is fixedly connected to the mandrel pressure plate. The lower end of the mandrel is rotatably connected to the mandrel pressure plate via a rotating component. The upper end of the mandrel passes through the third T-shaped slot of the mandrel pressure cover and exits through the third T-shaped slot.

8. The mold for manufacturing a helical gear with an integrally formed weight-reducing hole according to claim 1, characterized in that... The weight-reducing punch plate is fastened to the weight-reducing punch plate by a weight-reducing pressure cover. The weight-reducing pressure cover is provided with a fourth T-shaped slot. The weight-reducing rod is T-shaped. The weight-reducing pressure cover is fixedly connected to the weight-reducing punch plate. The lower end of the weight-reducing rod is rotatably connected to the weight-reducing punch plate via a rotating component. The upper end of the weight-reducing rod passes through the fourth T-shaped slot of the weight-reducing pressure cover and exits through the fourth T-shaped slot.

9. A mold for manufacturing helical gears with an integrally formed weight-reducing hole as described in claim 3, 6, 7 or 8, characterized in that... The rotating component is a bearing or spiral blade that can rotate automatically, and the upper punch, lower punch, weight reduction bar, and mandrel are rotated by the bearing or spiral blade.

10. A mold for manufacturing helical gears with an integrally formed weight-reducing hole according to claim 9, characterized in that... The spiral blade has a spiral groove on its surface. The spiral blade is fixed to the upper punch plate, lower punch plate, weight reduction punch plate, and mandrel pressure plate. A spiral block is provided on the surface of the spiral groove. The spiral block rotates on the spiral groove. The spiral block is connected to the end face. The spiral block rotates in the spiral groove to realize the rotation of the upper punch, lower punch, weight reduction rod, and mandrel.

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