CN110899687A

CN110899687A - Cylinder gasket mold and processing technique thereof

Info

Publication number: CN110899687A
Application number: CN201911062766.1A
Authority: CN
Inventors: 周中亮; 徐明传; 汪长开; 田同贵
Original assignee: HUOSHAN HUINENG AUTO PARTS MANUFACTURING Co Ltd
Current assignee: HUOSHAN HUINENG AUTO PARTS MANUFACTURING Co Ltd
Priority date: 2019-11-03
Filing date: 2019-11-03
Publication date: 2020-03-24
Anticipated expiration: 2039-11-03
Also published as: CN110899687B

Abstract

The invention discloses a cylinder gasket mould and a processing technique thereof, wherein the cylinder gasket mould consists of a lower mould and an upper mould, the lower mould comprises a lower mould guide plate and a guide pillar inside a lower mould connecting part, a lower mould seat and other parts of the lower mould; the upper die comprises an upper die guide plate and a guide sleeve in the upper die connecting part, an upper die base and other parts of the upper die; waste cutters are arranged around the lower die base; the upper die base is surrounded by a trimming knife, the trimming knife is fixed on a base of the upper die through a bolt, various punched holes are formed in the trimming knife, and the punched holes are also arranged on the base of the upper die; the cylinder gasket processing technology comprises the following steps: the method comprises the steps of raw material purchase, hot forming, die forming, hot press forming, heat treatment, surface treatment, grinding and polishing and part testing.

Description

Cylinder gasket mold and processing technique thereof

Technical Field

The invention relates to the field of cylinder gaskets, in particular to a cylinder gasket mold and a processing method thereof.

Background

The cylinder gasket is positioned between the cylinder cover and the cylinder body, and has the functions of filling microscopic pores between the cylinder cover and the cylinder body of the cylinder body, ensuring good sealing performance at a joint surface, further ensuring sealing of a combustion chamber and preventing air leakage of the cylinder and water leakage of a water jacket. The cylinder head gasket may be classified into a metal-asbestos gasket, a metal-composite gasket, an all-metal gasket, and the like, according to the material. The head gasket is a seal between the top surface of the block and the bottom surface of the cylinder head. The function of the sealing device is to keep the cylinder sealed and airtight, and keep the cooling liquid and the engine oil flowing from the machine body to the cylinder cover from leaking. The head gasket bears the pressure caused when the head bolts are tightened, and is subjected to the high temperature and high pressure of the combustion gas in the cylinder and the corrosion of the engine oil and the coolant. The existing cylinder gasket has the problems of low strength, poor sealing performance, poor high-temperature resistance, poor guiding performance and poor stability. The currently used cylinder gasket stamping die has certain defects, incomplete waste cutting, small production amount, small stamping quantity of one die at a time, lack of a fastening mechanism and poor knife edge toughness.

The initial and development time of domestic automobiles is short, the production process flow of the cylinder gasket is immature, the development speed is low, in addition, the process supervision and development force on the cylinder gasket in China is small, and the process flow development of the cylinder gasket is relatively incomplete. The improvement of the quality and the yield of the cylinder gasket is seriously hindered by the imperfection of the cylinder gasket process flow, and the cylinder gasket does not excessively adopt relatively perfect management flow and management scheme to limit the further optimization of the sealing performance of the cylinder block, so the perfection of the cylinder gasket process flow steps plays an important role.

Disclosure of Invention

In view of the above, it is necessary to provide a cylinder head gasket mold and a processing method thereof, which can further improve the quality of the cylinder head gasket by specifying and perfecting the processing steps of the cylinder head gasket on the basis of improving the production efficiency of the mold.

The cylinder gasket mould comprises a lower mould and an upper mould, wherein the lower mould comprises a lower mould guide plate and a guide pillar inside a lower mould connecting part, a lower mould seat and other parts of the lower mould; the upper die comprises an upper die guide plate and a guide sleeve in the upper die connecting part, an upper die base and other parts of the upper die; the waste material knives are arranged around the lower die base, and the number of the waste material knives is 14 and are uniformly distributed around the lower die base; the upper die base is surrounded by a trimming knife, the trimming knife is fixed on a base of the upper die through a bolt, various punched holes are formed in the trimming knife, and the punched holes are also arranged on the base of the upper die; the cylinder gasket processing technology comprises the following steps: raw material purchasing, a hot forming stage, a die forming stage, a hot press forming stage, a heat treatment stage, a surface treatment stage, a grinding and polishing stage and part testing.

Furthermore, the lower die guide post is arranged in the upper die guide sleeve, and the upper die guide plate and the lower die guide plate are meshed with each other.

Furthermore, other parts of the lower die comprise a lower die limiting block, a lower die hanging rod and a lower die fixing groove; other parts of the upper die comprise an upper die limiting block, an upper die hanging rod and an upper die fixing groove, and the upper die hanging rod and the lower die hanging rod are completely the same.

Further, the specific operation steps of the cylinder gasket processing technology are as follows:

raw material purchasing: the cylinder gasket manufacturing and processing raw material is manufactured by 15-30% of iron-based powder, 10-25% of copper-based powder, 1-4% of engine oil, 0.6-0.9% of tackifier, 0.1-0.4% of preservative, 0.3-0.6% of oxidant, 20-35% of graphite, 7-10% of resin and 1-2.5% of friction performance regulator.

And (3) a hot forming stage: and pouring the mixed raw materials into a mould for producing the raw materials, and adopting a double-sheet machine tool for thermoforming by means of pressure to obtain a blank raw material of the cylinder gasket.

And (3) a mold forming stage: placing the blank obtained in the thermoforming stage into the cylinder head gasket mold of claim 1 to obtain the body of the cylinder head gasket.

And (3) hot press molding: before hot press forming, a body obtained in a die forming stage is prepared, then rubber layers are added at the upper end and the lower end of the body, and a copper sheet is connected above the rubber layers, so that high-temperature pressurization of a press is facilitated, the body is tightly combined, and a preliminary cylinder gasket is manufactured.

In the heat treatment stage, the cylinder gasket which is primarily processed needs to be subjected to high-temperature treatment.

Surface treatment stage: the cylinder head gasket subjected to the heat treatment stage requires a special treatment of the surface.

Grinding and polishing: and grinding the cylinder gasket to remove burrs after the surface treatment.

Testing parts: the cylinder gasket after grinding and polishing is basically available on the market, and a data test needs to be carried out by sampling before the cylinder gasket is delivered out of the market to see whether the produced cylinder gasket meets the production requirements.

Further, the hot press molding treatment is not limited to the two-sheet hot molding of the present invention, and may be a matched mold molding, a differential pressure molding, or the like.

Further, in the hot-press molding stage, the hot-press condition is that the hot-press condition lasts for 25-40min in a high-neck induction hot-press furnace with the temperature of 800-1100 ℃ and the pressure of 40-70 MPa.

Further, the surface treatment TD is carried out at the temperature of 800-1050 ℃.

Further, in the grinding and polishing stage, a cutting agent, an abrasive and a polishing agent are added during grinding and polishing, and the ratio is 1:1: 1.

The cylinder gasket die and the processing technique thereof provided by the invention have the advantages that: the upper die and the lower die are better arranged on the upper side and the lower side of the machine tool through the upper die fixing groove and the lower die fixing groove, and meanwhile, the stability of the die is ensured by embedding and matching the upper die guide sleeve, the lower die guide pillar, the upper die guide plate and the lower die guide plate; the lower die base is provided with 14 waste cutters, so that on one hand, waste can be cut off cleanly, and on the other hand, the positioning effect of the die is achieved; the trimming knife edge of the upper die is distributed in a rectangular shape and is stably fixed on the upper die base by using bolts, and meanwhile, the rectangular knife edge enhances the toughness of the knife edge and prolongs the service life of the die; 4 moulds can be simultaneously punched out by the upper mould and the lower mould at one time, and the production efficiency is greatly improved. The adoption of the processing technology raw materials and the specific implementation steps enable the technological process of the cylinder gasket to be more perfect, the strength and the sealing performance of the cylinder gasket to be improved, meanwhile, the production cost is reduced, and the production efficiency is improved.

Drawings

FIG. 1 is a front view of an upper mold of a cylinder head gasket mold and a processing method thereof according to the present invention;

FIG. 2 is a front view of a lower mold of a cylinder head gasket mold and a processing method thereof according to the present invention;

fig. 3 is a schematic view of a cylinder head gasket body according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and 2, the cylinder head gasket mold and the processing method thereof according to the present invention comprises a lower mold 100 and an upper mold 200, wherein the lower mold 100 comprises a lower mold guide 111 and a guide post 112 in a lower mold connecting portion 110, a lower mold base 120 and other lower mold portions 130; the upper die 200 comprises an upper die guide plate 211 and a guide sleeve 212 in an upper die connecting part 210, an upper die holder 220 and an upper die other part 230; waste knives 121 are arranged around the lower die holder 120, and 14 waste knives 121 are uniformly distributed around the lower die holder 120; the upper die holder 220 is formed by surrounding a trimming knife 221, the trimming knife 221 is fixed on the base of the upper die 200 through a bolt 222, various punching holes 223 are formed in the trimming knife 221, and the punching holes 223 are also installed on the base of the upper die 200; the cylinder gasket processing technology comprises the following steps: raw material purchasing, a hot forming stage, a die forming stage, a hot press forming stage, a heat treatment stage, a surface treatment stage, a grinding and polishing stage and part testing.

The lower die guide post 112 is arranged in the upper die guide sleeve 212, and the upper die guide plate 211 and the lower die guide plate 111 are meshed with each other, so that the upper die and the lower die are more stable in die assembly.

The other parts 130 of the lower die comprise a lower die limiting block 131, a lower die hanging rod 132 and a lower die fixing groove 133; the other part 230 of the upper mold comprises an upper mold limiting block 231, an upper mold hanging rod 232 and an upper mold fixing groove 233, and the upper mold hanging rod 232 and the lower mold hanging rod 132 are completely the same. The limiting block plays a role in limiting the stroke of the upper die in the process of grinding the die so as to prevent excessive stamping; the lifting rod can be used for better facilitating the lifting of the die; the upper and lower fixed grooves can ensure that the die is more safely and more firmly arranged on the machine tool.

Example 1

The specific operation steps of the cylinder gasket processing technology are as follows:

And (3) a hot forming stage: and pouring the mixed raw materials into a mould for producing the raw materials, and adopting a double-sheet machine tool for thermoforming by means of pressure to obtain a blank raw material of the cylinder gasket. The hot press molding treatment is not limited to the twin-sheet hot molding of the present invention, and may be a matched mold molding or a differential pressure molding. The hot pressing condition is that the hot pressing lasts for 25-40min in a high-neck induction heating piezoelectric furnace with the temperature of 800-.

And (3) a mold forming stage: placing the blank obtained in the thermoforming stage into the cylinder head gasket mold of claim 1 to obtain the body 401 of the cylinder head gasket.

And (3) hot press molding: before hot press forming, a body (401) obtained in a die forming stage is prepared, then rubber layers (402) are added at the upper end and the lower end of the body (401), and copper sheets (403) are connected above the rubber layers (402) to facilitate high-temperature pressurization of a press and tightly combine the copper sheets to manufacture a primary cylinder gasket (400).

Surface treatment stage: the cylinder head gasket subjected to the heat treatment stage requires a special treatment of the surface. The surface special treatment is TD treatment, and the TD treatment is carried out at the temperature of 800-1050 ℃.

Grinding and polishing: and grinding the cylinder gasket to remove burrs after the surface treatment. And in the grinding and polishing stage, a cutting agent, an abrasive and a polishing agent are added during grinding and polishing, and the ratio is 1:1: 1.

Cylinder gasket detection experiment: the cylinder gasket is adopted, the test is totally 500 pairs, each implementation case is 125 pairs, the friction coefficient, the wear rate and the sealing performance are detected, the cylinder gasket is installed on an automobile cylinder when the sealing performance is detected, then the pressure detection is carried out, and the test analysis is carried out on a certain known cylinder gasket in Germany as a comparison group.

Example 2

Embodiment 3

Example 4

raw material purchasing: the cylinder gasket manufacturing and processing raw materials are manufactured by purchasing required cylinder gaskets by a purchasing department, and comprise 30% of iron-based powder, 25% of copper-based powder, 4% of engine oil, 0.9% of tackifier, 0.4% of preservative, 0.6% of oxidant, 35% of graphite, 10% of resin and 2.5% of friction performance regulator.

The results of the cylinder head gasket test and the results of the control test are shown in the following table:

table one: coefficient of friction and rate of wear

Table two: pressure gauge detection

Compared with the control group, the cylinder gasket obtained in the examples 1 to 4 has stable friction coefficient along with the temperature change, obviously reduced wear rate, standard pressure gauge value and small pressure range change amplitude.

The verification result shows that: the invention improves the prior mould by optimization and perfects the planning of the process flow, effectively improves the friction coefficient and the wear rate of the cylinder gasket obtained by the invention, greatly improves the sealing property of the cylinder gasket, improves the production efficiency and enhances the quality of the cylinder gasket.

Although the present invention has been described with reference to specific embodiments, it should be understood that the present invention is not limited thereto, and various modifications, substitutions and alterations can be made by those skilled in the art without creative efforts based on the technical scheme of the present invention.

Claims

1. The cylinder gasket mold comprises a lower mold (100) and an upper mold (200), and is characterized in that: the lower die (100) comprises a lower die guide plate (111) and a guide post (112) in a lower die connecting part (110), a lower die seat (120) and other lower die parts (130); the upper die (200) comprises an upper die guide plate (211) and a guide sleeve (212) in an upper die connecting part (210), an upper die seat (220) and other upper die parts (230); waste knives (121) are arranged around the lower die holder (120), and the waste knives (121) are 14 and are uniformly distributed around the lower die holder (120); the upper die holder (220) is formed by surrounding a trimming knife (221), the trimming knife (221) is fixed on a base of the upper die (200) through a bolt (222), various punched holes (223) are formed in the trimming knife (221), and the punched holes (223) are also installed on the base of the upper die (200); the cylinder gasket processing technology comprises the following steps: raw material purchasing, a hot forming stage, a die forming stage, a hot press forming stage, a heat treatment stage, a surface treatment stage, a grinding and polishing stage and part testing.

2. The cylinder head gasket mold and the processing method thereof according to claim 1, wherein the lower mold guide post (112) is installed in the upper mold guide sleeve (212), and the upper mold guide plate (211) and the lower mold guide plate (111) are engaged with each other.

3. The cylinder head gasket mold and the processing method thereof according to claim 1, wherein other parts (130) of the lower mold comprise a lower mold limiting block (131), a lower mold hanging rod (132) and a lower mold fixing groove (133); the other parts (230) of the upper die comprise an upper die limiting block (231), an upper die hanging rod (232) and an upper die fixing groove (233), and the upper die hanging rod (232) and the lower die hanging rod (132) are completely the same.

4. The cylinder head gasket mold and the processing method thereof according to claim 1, wherein the processing method of the cylinder head gasket comprises the following specific operation steps:

(1) raw material purchasing: the cylinder gasket manufacturing and processing raw material is manufactured by 15-30% of iron-based powder, 10-25% of copper-based powder, 1-4% of engine oil, 0.6-0.9% of tackifier, 0.1-0.4% of preservative, 0.3-0.6% of oxidant, 20-35% of graphite, 7-10% of resin and 1-2.5% of friction performance regulator.

(2) And (3) a hot forming stage: and pouring the mixed raw materials into a mould for producing the raw materials, and adopting a double-sheet machine tool for thermoforming by means of pressure to obtain a blank raw material of the cylinder gasket.

(3) And (3) a mold forming stage: placing the blank obtained in the thermoforming stage into the cylinder head gasket mold of claim 1, resulting in a body (401) of the cylinder head gasket.

(4) And (3) hot press molding: before hot press forming, a body (401) obtained in a die forming stage is prepared, then rubber layers (402) are added at the upper end and the lower end of the body (401), and copper sheets (403) are connected above the rubber layers (402) to facilitate high-temperature pressurization of a press and tightly combine the copper sheets to manufacture a primary cylinder gasket (400).

(5) In the heat treatment stage, the cylinder gasket which is primarily processed needs to be subjected to high-temperature treatment.

(6) Surface treatment stage: the cylinder head gasket subjected to the heat treatment stage requires a special treatment of the surface.

(7) Grinding and polishing: and grinding the cylinder gasket to remove burrs after the surface treatment.

(8) Testing parts: the cylinder gasket after grinding and polishing is basically available on the market, and a data test needs to be carried out by sampling before the cylinder gasket is delivered out of the market to see whether the produced cylinder gasket meets the production requirements.

5. The specific operation steps of a cylinder head gasket processing technology according to claim 4, characterized in that the hot press molding treatment modes include but not limited to the double-sheet hot molding, matched mold molding, differential pressure and the like.

6. The specific operation steps of the cylinder gasket processing technology as claimed in claim 4, wherein the hot-press molding stage is carried out in a high-neck induction heating piezoelectric furnace with a temperature of 800-.

7. The specific operation procedure of the cylinder gasket processing technology as claimed in claim 4, wherein the surface treatment TD is performed at a temperature of 800-1050 ℃.

8. The specific operation steps of the cylinder gasket processing technology according to claim 4, wherein in the grinding and polishing stage, a cutting agent, an abrasive and a polishing agent are added during grinding and polishing, and the ratio of the cutting agent to the abrasive to the polishing agent is 1:1: 1.