CN216828597U

CN216828597U - Forming die of camshaft and signal wheel

Info

Publication number: CN216828597U
Application number: CN202122639193.3U
Authority: CN
Inventors: 丁士; 何勇
Original assignee: Chengdu Jinding Precision Casting Co ltd
Current assignee: Chengdu Jinding Precision Casting Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-06-28
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses a forming die of camshaft and signal wheel, it includes becomes the die cavity and becomes the die cavity down, go up the lower extreme opening that becomes the die cavity, the upper end opening that becomes the die cavity down, go up the mutual lock in die cavity and lower die cavity, it has the molding sand to go up to become to pack between die cavity and the lower die cavity, be provided with the first die cavity of moulding plastics camshaft in the molding sand, the one end of first die cavity and the second die cavity intercommunication of placing the signal wheel, the other end of first die cavity passes through feedstock channel and feeding chamber intercommunication, the upper end of feeding cavity and the feed inlet intercommunication of last die cavity upper end, be provided with high temperature resistance filter screen in the feed inlet. The utility model discloses reduced and ground assembly axle journal process and pressure equipment signal wheel process, made the flow of working optimize more, cost reduction. The consumption of the cutter is reduced, and the cost (cutter cost, labor cost and equipment depreciation) is greatly reduced.

Description

Forming die of camshaft and signal wheel

Technical Field

The utility model relates to a technical field is made to the device, concretely relates to forming die of camshaft and signal wheel.

Background

With the progress of society and the development of economy, the automobile industry has also gained vigorous development, the camshaft of an automobile engine is used as an important part of a valve actuating mechanism of an internal combustion engine, the forming mode of the signal wheel structure directly determines the manufacturing cost of the product, and the optimal cost can occupy the market, so that the forming method of the signal wheel becomes the key for determining the success or failure of a project.

In the prior art, two methods for forming a camshaft signal wheel are generally adopted, the first method is made by powder metallurgy and has higher precision, but the cost is inevitably increased; because the excircle of the assembling shaft neck and the inner hole of the signal wheel are both of round smooth surface structures, the assembly shaft neck has the risk of skidding in the using process. In addition, the signal wheel needs to be heated to more than 75 ℃ during assembly, the process is complex to control, and the energy consumption is high. The other method is to cast the signal wheel and the camshaft into a whole, and in the method, because the signal wheel is made of the same material (gray iron or nodular iron) as the camshaft body and has higher hardness, when the signal wheel teeth are machined, the cutter consumption is large, and the intermittent cutting is performed, so that the cutter is easy to be struck; the process cost is increased, the processing and debugging time is prolonged, and the process processing beat is slowed down.

SUMMERY OF THE UTILITY MODEL

The aforesaid is not enough to prior art, the utility model provides a camshaft that the manufacturing cost is low and forming die of signal wheel.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows:

the utility model provides a forming die of camshaft and signal wheel, it includes becomes the die cavity and becomes the die cavity down, go up the lower extreme opening that becomes the die cavity, the upper end opening that becomes the die cavity down, go up the die cavity and the mutual lock in die cavity down, it has the molding sand to go up to become to pack between die cavity and the die cavity down, be provided with injection camshaft's the first die cavity in the molding sand, the one end of first die cavity and the second die cavity intercommunication of placing the signal wheel, feed channel and feeding chamber intercommunication are passed through to the other end of first die cavity, the upper end of feeding cavity and the feed inlet intercommunication of last die cavity upper end, be provided with high temperature resistant filter screen in the feed inlet.

The utility model has the advantages that: the forming die of the scheme is used for producing the camshaft in an injection molding mode, a first forming cavity of the camshaft is constructed through molding sand, a produced signal wheel is firstly placed into a second forming cavity in the injection molding process, an inner hole of the signal wheel is provided with a spline structure for preventing rotation, high-temperature injection molding solution is poured into a feeding cavity through a feeding hole, and then the feeding cavity is filled with the first forming cavity; treat that high temperature injection solution fills the die cavity after, cooling, solidification, camshaft and signal wheel form inseparable tooth and inlay formula zonulae occludens, because the signal wheel hole has the spline shape structure, so injection solution solidifies the back and very firm with the combination of signal wheel, has avoided the risk that signal wheel rotated and removed on the camshaft.

The camshaft with the signal wheel formed by the die is machined, the excircle of the signal wheel is centered to process a shaft neck, one of the teeth of the signal wheel is used for determining the angle to process a pin hole, and then the pin hole is used for positioning and processing a cam.

The process of grinding and assembling the shaft neck and the process of pressing and assembling the signal wheel are reduced, so that the processing flow is optimized, and the cost is reduced. The spline-shaped combination mode avoids the risk of slipping of the signal wheel. And the procedure of milling signal gear teeth is reduced. Because the signal gear teeth are not processed, the consumption of the cutter is reduced, and the cost (cutter cost, labor cost and equipment depreciation) is greatly reduced.

Drawings

Fig. 1 is a structural view of a mold for molding a camshaft and a signal wheel.

The device comprises a lifting lug, a filter screen, a feeding hole, a feeding channel, an upper forming cavity, a feeding cavity, a first fixing ring, a second fixing ring, a first forming cavity, a second forming cavity, a first fixing ring, a second forming cavity, a first forming cavity and a second forming cavity, wherein the lifting lug is 1, the lifting lug is 2, the filter screen is 3, the feeding hole is 4, the feeding channel is 5, the upper forming cavity is 6, the feeding cavity is 7, the first fixing ring is 8, the second fixing ring is 9, the second forming cavity is 10.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.

As shown in fig. 1, the forming die of the camshaft and the signal wheel of this scheme includes last shaping chamber 5 and lower shaping chamber, go up the lower extreme opening of shaping chamber 5, the upper end opening of lower shaping chamber, go up shaping chamber 5 and the mutual lock of lower shaping chamber, it has the molding sand to go up to pack between shaping chamber 5 and the lower shaping chamber, be provided with injection camshaft's first shaping chamber 10 in the molding sand, the one end of first shaping chamber 10 and the second shaping chamber 9 intercommunication of placing the signal wheel, feeding channel 4 and feeding chamber 6 intercommunication are passed through to the other end of first shaping chamber 10, the upper end of feeding chamber 6 and the feed inlet 3 intercommunication of last shaping chamber 5 upper end, be provided with high temperature resistant filter screen 2 in the feed inlet 3.

When the scheme is implemented, the feeding cavity 6 is of a conical structure with a small upper part and a large lower part, and when the high-temperature injection molding solution is poured into the feeding cavity 6, the high-temperature injection molding solution can slowly flow into the first molding cavity 10 and the second molding cavity 9. The feed inlet 3 is a funnel-shaped structure with a large upper part and a small lower part, and high-temperature injection molding solution is convenient to pour into.

When this scheme is implemented, the lower extreme of going up the one-tenth die cavity 5 is provided with the solid fixed ring of round 7, and the upper end of lower one-tenth die cavity is provided with the solid fixed ring of round second 8, through a plurality of bolt fixed connection between the solid fixed ring of first 7 and the solid fixed ring of second 8, is provided with sealed clay between the solid fixed ring of first 7 and the solid fixed ring of second 8. The connection is ensured to be stable, the installation and the disassembly are convenient, and certain sealing performance is realized.

The two ends of the upper forming cavity 5 are provided with the lifting lugs 1, and after the product is formed, the upper forming cavity 5 is lifted conveniently through the lifting lugs 1 to take out the product.

The molding sand includes upper portion molding sand and lower part molding sand, and the lower plane of upper portion molding sand is with the lower terminal surface parallel and level of last molding cavity, and first molding cavity 10, second molding cavity 9 and feedstock channel 4 take shape between the lower plane of upper portion molding sand and the upper surface of lower part molding sand.

The forming die of the scheme is used for producing the camshaft in an injection molding mode, a first forming cavity 10 of the camshaft is constructed through molding sand, during the injection molding process, a produced signal wheel is firstly placed into a second forming cavity 9, then high-temperature injection molding solution is poured into a feeding cavity 6 through a feeding hole 3, and then the high-temperature injection molding solution is poured into the first forming cavity 10; treat that high temperature injection solution fills the die cavity after, cooling, solidification, camshaft and signal wheel form inseparable tooth and inlay formula zonulae occludens, because the hole of signal wheel has the spline shape structure, so injection solution solidifies the back and very firm with the combination of signal wheel, has avoided the risk that signal wheel rotated and removed on the camshaft.

The process of grinding and assembling the shaft neck and the process of pressing and assembling the signal wheel are reduced, so that the processing flow is optimized, and the cost is reduced. And the spline-shaped combination mode avoids the risk of slipping of the signal wheel. The process of milling the signal gear teeth is reduced. Because the signal gear teeth are not processed, the consumption of the cutter is reduced, and the cost (cutter cost, labor cost and equipment depreciation) is greatly reduced.

Claims

1. The utility model provides a forming die of camshaft and signal wheel, its characterized in that, includes last shaping chamber and lower shaping chamber, go up the lower extreme opening of shaping chamber, the upper end opening of shaping chamber down, go up the mutual lock in shaping chamber and lower shaping chamber, it has the molding sand to go up to pack between shaping chamber and the lower shaping chamber, be provided with injection molding camshaft's first shaping chamber in the molding sand, the one end of first shaping chamber and the second shaping chamber intercommunication of placing the signal wheel, the other end of first shaping chamber passes through feedstock channel and feeding chamber intercommunication, the upper end of feeding chamber and the feed inlet intercommunication of last shaping chamber upper end, be provided with high temperature resistant filter screen in the feed inlet.

2. The mold for molding a camshaft and a signal wheel as claimed in claim 1, wherein the feeding cavity has a tapered structure with a smaller top and a larger bottom.

3. The mold for molding a camshaft and a signal wheel as claimed in claim 1, wherein the feed inlet is a funnel-shaped structure with a large top and a small bottom.

4. The forming die for the camshaft and the signal wheel as claimed in claim 1, wherein a circle of first fixing ring is arranged at the lower end of the upper forming cavity, a circle of second fixing ring is arranged at the upper end of the lower forming cavity, and the first fixing ring and the second fixing ring are fixedly connected through a plurality of bolts.

5. The mold for molding a camshaft and a signal wheel as claimed in claim 4, wherein a sealing mortar is disposed between the first fixing ring and the second fixing ring.

6. The mold for molding a camshaft and a signal wheel as claimed in claim 1, wherein lifting lugs are disposed at two ends of the upper molding cavity.

7. The mold for molding a camshaft and a signal wheel as claimed in claim 1, wherein the molding sand includes upper molding sand and lower molding sand, a lower surface of the upper molding sand is flush with a lower end surface of the upper molding cavity, and the first molding cavity, the second molding cavity and the feeding passage are molded between the lower surface of the upper molding sand and an upper surface of the lower molding sand.