Insert tooth profile bushing machining device

Abstract

The utility model discloses an embedded part tooth profile bush processing device, including split type's upper die holder (1) and lower die holder (2), and the middle part detachable connection of lower die holder (2) has first fixed mould core (3) and second fixed mould core (4), and first fixed mould core (3) and second fixed mould core (4) between present top and bottom distribution and mutually adhere to, and the one side of first fixed mould core (3) or second fixed mould core (4) forms first air groove (5), and the outside of first air groove (5) is equipped with the air room (6) of being located first fixed mould core (3) or second fixed mould core (4) installation gap place, and the outside of air room (6) is equipped with the second air groove (7) of being located first fixed mould core (3) one side side wall, and first air groove (5), air room (6) and second air groove (7) between sequentially communicate. The utility model can realize the timely discharge to the air in forming cavity.

Description

Technical Field

[0001] This utility model relates to a toothed bushing, and more particularly to a toothed bushing insert processing device. Background Technology

[0002] Insert toothed bushings are a common type of metal part used in automobiles. They are cylindrical in shape with a toothed structure around their perimeter. Currently, the processing method for insert toothed bushings involves cold heading using a cold heading die. Specifically, a fixed die core, a pressure bar, and a punch are mounted on the die frame of the cold heading die. The fixed die and pressure bar are connected and fixed to a stationary die frame, while the punch is fixedly connected to a moving die frame. During use, the punch pulls the blank into the fixed die, and the pressure bar, in conjunction with the blank, compresses it from both ends. This compression causes the blank to deform outwards and completely conform to the toothed surface inside the fixed die core, thus forming the corresponding toothed structure.

[0003] However, the drawback of the aforementioned cold heading process is that, during the extrusion process, the sidewalls of the billet deform outwards until they completely fit against the inner hole of the fixed die core. Simultaneously, both ends of the billet are completely fitted against the pressure bar and punch, forming a limiting effect. This causes air originally located in the gap between the billet and the inner hole of the die core to be unable to escape in time due to the compression of the billet and the obstruction from the fixed die core, pressure bar, and punch, resulting in a decrease in forming quality. Furthermore, to ensure the cold heading of the billet, no gaps for air escape can be provided at the connection points of the pressure bar, punch, and fixed die core, further increasing the difficulty of air removal.

[0004] Therefore, existing insert toothed bushings have the problem of air not being able to escape properly during cold heading. Utility Model Content

[0005] The purpose of this invention is to provide a device for processing insert toothed bushings. It enables timely removal of air from the molding cavity.

[0006] The technical solution of this utility model: an insert toothed bushing processing device, including a split upper mold frame and a lower mold frame, a first fixed mold core and a second fixed mold core are detachably connected in the middle of the lower mold frame, the first fixed mold core and the second fixed mold core are distributed vertically and fit together, a first vent groove is formed on one side of the first fixed mold core or the second fixed mold core, an air storage chamber is provided on the outside of the first vent groove at the installation gap of the first fixed mold core or the second fixed mold core, a second vent groove is provided on the side wall of one side of the first fixed mold core outside the air storage chamber, and the first vent groove, the air storage chamber and the second vent groove are connected in sequence.

[0007] In the aforementioned insert tooth bushing processing device, an inclined surface is formed on the outer side of the end of the first fixed mold core, and an annular air storage chamber is formed between the inclined surface, the second fixed mold core and the lower mold frame.

[0008] In the aforementioned insert tooth bushing processing device, a conical mounting cavity is formed in the middle of the lower mold frame. The first fixed mold core and the second fixed mold core are both fastened and connected in the mounting cavity. The outer end of the second fixed mold core is provided with a limiting sleeve for extruding and limiting the first fixed mold core and the second fixed mold core. The lower mold frame is detachably connected to the outside of the limiting sleeve.

[0009] In the aforementioned insert tooth bushing processing device, the middle part of the lower mold frame is provided with a fixed cavity that communicates with the mounting cavity. The lower end of the second fixed mold core extends into the fixed cavity and fits against the limiting sleeve. The limiting sleeve is fastened to a clamping member on the side away from the second fixed mold core. The external thread of the clamping member is connected to the fixed cavity.

[0010] In the aforementioned insert tooth bushing processing device, the limiting sleeve is provided with a first guide hole and a second guide hole that are interconnected. A pressure bar is slidably connected in the first guide hole. One end of the pressure bar passes through the first guide hole and extends into the second fixed mold core. The other end of the pressure bar extends into the second guide hole and forms a pressure head. A push rod is slidably connected in the second guide hole to the outside of the pressure head.

[0011] In the aforementioned insert tooth bushing processing device, a punch is connected to the middle of the upper mold frame, and a forming cavity is formed between the punch, the first fixed mold core, the second fixed mold core and the pressure bar.

[0012] Compared with the prior art, this utility model has the following characteristics:

[0013] (1) By defining the structure of the first fixed mold core and the second fixed mold core, the present invention enables the first fixed mold core and the second fixed mold core to form a first vent groove and an air storage chamber on the outside of the molding cavity after installation. This allows the air in the molding cavity to enter the air storage chamber along the first vent groove after being compressed, and then to be discharged outward through the second vent groove. This achieves stable discharge of air in the molding cavity during the cold heading process of the billet, ensuring the cold heading effect of the device. The annular air storage chamber can also temporarily store the air discharged from the molding cavity. That is, the air first enters the air storage chamber quickly through the first vent groove, and then is gradually discharged outward from the air storage chamber, thereby avoiding the problem that the air cannot be discharged in time due to the narrow air passage.

[0014] (2) By limiting the structure of the limiting sleeve, the clamping part and the lower mold frame, the clamping part can also squeeze the limiting sleeve by screwing in, and use the limiting sleeve to press the first fixed mold core and the second fixed mold core, so that the first fixed mold core and the second fixed mold core fit together tightly, avoiding structural changes in the molding cavity due to processing or installation errors, thereby ensuring the processing quality of the insert tooth bushing.

[0015] (3) By combining the first ventilation groove and the inclined surface, this utility model can also reduce the cross-sectional shape and length of the first ventilation groove as much as possible while realizing the exhaust function. This reduces the impact of the first ventilation groove on the forming cavity after it is opened, ensuring the forming effect of the blank. On the other hand, it can also shorten the length of the air passage when the air enters the air storage chamber, so that the air can enter the air storage chamber more quickly and ensure its exhaust stability.

[0016] Therefore, this invention can achieve timely discharge of air from the molding cavity. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 yes Figure 1 A magnified view from direction A;

[0019] Figure 3 This is a process flow diagram for insert toothed bushings.

[0020] The markings in the attached diagram are as follows: 1-Upper mold frame, 2-Lower mold frame, 3-First fixed mold core, 4-Second fixed mold core, 5-First venting groove, 6-Air storage chamber, 7-Second venting groove, 8-Limiting sleeve, 9-Clamping component, 10-Pressure bar, 11-Push rod, 12-Punch bar, 13-Stop block, 201-Mounting cavity, 202-Fixed cavity, 301-Inclined surface. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0022] Example. An insert toothed bushing machining apparatus, configured as follows: Figure 1 As shown, the device includes a split upper mold frame 1 and a lower mold frame 2. The lower mold frame 2 is fastened to the middle with a first fixed mold core 3 and a second fixed mold core 4. The first fixed mold core 3 and the second fixed mold core 4 are distributed vertically and fit together. A first venting groove 5 is formed on one side of the first fixed mold core 3. There are multiple first venting grooves 5, which are distributed in a ring around the circumference of the first fixed mold core 3. An air storage chamber 6 is provided on the outside of the first venting groove 5 at the installation gap between the first fixed mold core 3 and the second fixed mold core 4. A second venting groove 7 is provided on the side wall of the first fixed mold core 3 on the outside of the air storage chamber 6. The cross-sectional shape of the first venting groove 5 and the second venting groove 7 is arc-shaped. The first venting groove 5, the air storage chamber 6 and the second venting groove 7 are connected in sequence.

[0023] An inclined surface 301 is formed on the outer side of the end of the first fixed mold core 3, and the end of the first venting groove 5 extends to the inclined surface 301. The inclined surface 301 is separated from the second fixed mold core 4, and an annular air storage chamber 6 is formed between the inclined surface 301, the second fixed mold core 4 and the lower mold frame 2.

[0024] The lower mold frame 2 forms a conical mounting cavity 201 in the middle. The first fixed mold core 3 and the second fixed mold core 4 are both fastened and connected in the mounting cavity 201. The outer end of the second fixed mold core 4 is provided with a limiting sleeve 8 for extruding and limiting the first fixed mold core 3 and the second fixed mold core 4. The outer side of the limiting sleeve 8 is fastened and connected to the lower mold frame 2.

[0025] The lower mold frame 2 has a fixed cavity 202 in the middle that communicates with the mounting cavity 201. The lower end of the second fixed mold core 4 extends into the fixed cavity 202 and fits against the limiting sleeve 8. The limiting sleeve 8 is fastened with a clamping member 9 on the side away from the second fixed mold core 4. Both the limiting sleeve 8 and the clamping member 9 are located in the fixed cavity 202. The external thread of the clamping member 9 is connected to the fixed cavity 202. The outer end of the fixed cavity 202 is provided with an internal thread that matches the clamping member 9.

[0026] The limiting sleeve 8 is provided with a first guide hole and a second guide hole that are interconnected. A pressure rod 10 is slidably connected in the first guide hole. One end of the pressure rod 10 passes through the first guide hole and extends into the second fixed mold core 4. The other end of the pressure rod 10 extends into the second guide hole and forms a pressure head. The pressure head is used to limit the extension position of the pressure rod 10. That is, when the pressure head is in contact with the inner end face of the second guide hole, the pressure rod 10 is in a fully extended state. A push rod 11 is slidably connected in the second guide hole to the outside of the pressure head.

[0027] The push rod 11 is externally connected to a drive device, and the push rod 11 works together to drive the pressure bar 10 to extend and retract, so that the pressure bar 10 can push the blank out of the lower die frame 2 after cold heading.

[0028] The lower mold frame 2 is fixedly connected to a stop block 13 at the end away from the upper mold frame 1. The stop block 13 is used to limit the rear end of the push rod 11, so that when the pressure bar 10 is in the retracted state, the pressure bar 10 and the push rod 11 remain in the same position in the lower mold frame 2 due to the limit of the stop block 13.

[0029] A punch 12 is connected to the middle of the upper mold frame 1. A forming cavity for cold heading of the blank is formed between the punch 12, the first fixed mold core 3, the second fixed mold core 4 and the pressure bar 10.

[0030] The first fixed mold core 3 is designed to minimize the width of its mating surface and the cross-sectional size of the first venting groove 5, thereby ensuring stable air discharge while reducing damage to the forming cavity and ensuring the forming effect of the blank after cold heading.

[0031] The working principle of this utility model is as follows: In use, the upper mold frame 1 drives the punch 12 to move towards the upper mold frame 1, pushing the blank into the first fixed mold core 3. When the blank moves to contact the pressure bar 10, the subsequent extrusion action of the punch 12 causes the blank to deform outwards until its sidewalls are completely in contact with the inner walls of both the first and second fixed mold cores 3 and 4, achieving the forming effect. During the extrusion deformation, the air originally located in the forming cavity will first flow rapidly along the first venting groove 5 to the air storage chamber 6 under the extrusion action, and then gradually be discharged outwards through the second venting groove 7, achieving the exhaust function. The air storage chamber 6 temporarily stores the air, allowing the air in the forming cavity to be quickly discharged in a short time, avoiding air blockage caused by narrow air passages.

[0032] After the blank is cold-forged, the upper die frame 1 drives the punch 12 to return to its original position, and then the push rod 11 drives the pressure rod 10 to push outward, so that the blank is removed from the lower die frame 2 under the pushing action and returns to the clamping position, thus realizing the cold forging action of the blank.

Claims

1. An insert toothed bushing processing device, characterized in that: The device includes a split upper mold frame (1) and a lower mold frame (2). The lower mold frame (2) is detachably connected to a first fixed mold core (3) and a second fixed mold core (4) in the middle. The first fixed mold core (3) and the second fixed mold core (4) are distributed vertically and fit together. A first venting groove (5) is formed on one side of the first fixed mold core (3) or the second fixed mold core (4). An air storage chamber (6) is provided on the outside of the first venting groove (5) at the installation gap of the first fixed mold core (3) or the second fixed mold core (4). A second venting groove (7) is provided on the outside of the air storage chamber (6) on one side wall of the first fixed mold core (3). The first venting groove (5), the air storage chamber (6) and the second venting groove (7) are connected in sequence.

2. The insert toothed bushing processing device according to claim 1, characterized in that: An inclined surface (301) is formed on the outer side of the end of the first fixed mold core (3), and an annular air storage chamber (6) is formed between the inclined surface (301), the second fixed mold core (4) and the lower mold frame (2).

3. The insert toothed bushing processing apparatus according to claim 1, characterized in that: The lower mold frame (2) forms a conical mounting cavity (201) in the middle. The first fixed mold core (3) and the second fixed mold core (4) are both fastened and connected in the mounting cavity (201). The outer end of the second fixed mold core (4) is provided with a limiting sleeve (8) for extruding and limiting the first fixed mold core (3) and the second fixed mold core (4). The lower mold frame (2) is detachably connected to the outside of the limiting sleeve (8).

4. The insert toothed bushing processing apparatus according to claim 3, characterized in that: The lower mold frame (2) has a fixed cavity (202) in the middle that connects to the mounting cavity (201). The lower end of the second fixed mold core (4) extends into the fixed cavity (202) and fits against the limiting sleeve (8). The limiting sleeve (8) is fastened with a clamping member (9) on the side away from the second fixed mold core (4). The external thread of the clamping member (9) is connected to the fixed cavity (202).

5. The insert toothed bushing processing apparatus according to claim 4, characterized in that: The limiting sleeve (8) is provided with a first guide hole and a second guide hole that are interconnected. A pressure bar (10) is slidably connected in the first guide hole. One end of the pressure bar (10) passes through the first guide hole and extends into the second fixed mold core (4). The other end of the pressure bar (10) extends into the second guide hole and forms a pressure head. A push rod (11) is slidably connected in the second guide hole to the outside of the pressure head.

6. The insert toothed bushing processing apparatus according to claim 5, characterized in that: A punch (12) is connected to the middle of the upper mold frame (1), and a forming cavity is formed between the punch (12), the first fixed mold core (3), the second fixed mold core (4) and the pressure bar (10).

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