Technological method of universal joint

Abstract

The invention discloses a technological method of a universal joint. The technological method comprises the following steps that S1, a bar is cut through a round steel cut-off machine, and a blank is obtained; s2, the blank is subjected to isothermal spheroidizing annealing treatment through a cover type annealing furnace, and a primary material is obtained; s3, the primary material is subjected to shot blasting treatment through a crawler-type shot blasting machine, and a standby material is obtained; s4, the to-be-treated material is subjected to phosphorus saponification surface treatment, and a treated material is obtained; and S5, the treated material is subjected to first-time cold extrusion through a first cold extrusion forming machine and then subjected to second-time cold extrusion through a second cold extrusion forming machine, and finally a finished product is obtained. The mode of high power consumption of heating is avoided, the situation that the mold is cooled by using aquadag is avoided, on one hand, the cost investment is greatly reduced, and on the other hand, the situation that the working environment of workers becomes poor due to the fact that the field environment of the aquadag cooling medium is poor, and work of the workers and work of later workers are not facilitated is also avoided.

Description

Technical Field

[0001] The invention relates to the technical field, and in particular to a process method for a universal joint. Background Art

[0002] With the rapid development of the automobile industry, automobiles have become a very common means of transportation. In automobiles, universal joints are mechanical parts that realize variable-angle power transmission. They are used in positions where the direction of the transmission axis needs to be changed. They are the "joint" parts of the universal transmission device of the automobile drive system. The universal joint is a device that uses a ball-shaped device to realize shaft power output in different directions. In the prior art, universal joints are not only used for power output, but are also widely used as connecting devices. For the existing universal joints, the bar parts are heated and then placed in a mold for forging. This type of production consumes high power consumption for heating, the efficiency of the warm extrusion process is low, and graphite emulsion needs to be used to cool the mold after heating. This will increase the cost investment on the one hand, and on the other hand, it will also make the on-site environment poor and the working environment of the workers poor. In view of this phenomenon, it is necessary to improve the existing technology. Summary of the invention

[0003] 1. Technical issues that need to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides a process method for a universal joint, which avoids the use of a high power consumption heating method and is also beneficial to avoid the use of graphite emulsion to cool the mold. On the one hand, it greatly reduces the cost investment. On the other hand, it is also beneficial to avoid the use of graphite emulsion cooling medium, which has a poor on-site environment and a worse working environment for workers, which is not conducive to the work of the staff and the work of later workers.

[0005] 2. Technical solutions that need to be adopted

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A process for a universal joint comprises the following steps:

[0008] S1, cutting the bar material by a round steel cutting machine to obtain a blank;

[0009] S2, subjecting the blank to isothermal spheroidizing annealing in a bell-type annealing furnace to obtain a primary material;

[0010] S3, the initial material is shot blasted by a crawler-type shot blasting machine to obtain the waiting material;

[0011] S4, subjecting the material to be treated to a phosphorus saponification surface treatment to obtain a treated material;

[0012] S5, the processed material is subjected to a first cold extrusion molding machine for a first cold extrusion, and then subjected to a second cold extrusion molding machine for a second cold extrusion, to finally obtain a finished product.

[0013] Preferably, the round steel cutting machine used in step S1 is a round steel cutting machine of model LYQ-50 produced by Taizhou Beili Machinery Co., Ltd.

[0014] Preferably, in step S2, the hood-type annealing furnace is first inspected, heated, cooled, and then kept warm. Next, the temperature is cooled again, and then kept warm. The temperature is kept warm again, and then cooled again, and finally the heating hood is lifted out.

[0015] Preferably, the belt shot blasting machine used in step S3 is a Q3210 crawler shot blasting machine produced by Yancheng Shengda Technology Co., Ltd.

[0016] Preferably, in step S3, the specific operation of the crawler shot blasting machine is: first loading → closing the door and starting the machine → shot blasting for 20 minutes to 50 minutes → stopping, inspecting and discharging.

[0017] Preferably, the crawler-type shot blasting machine uses steel sand for shot blasting machines.

[0018] Preferably, in step S4, the phosphating saponification surface treatment is specifically as follows: load the material to be processed into the crane treatment tank, then close the door → go to 1# cold water tank, soak and rotate for a period of time → 2# hot water tank, soak and rotate for a period of time → 3# phosphating tank, soak and rotate for a period of time → 4# hot water tank, soak and rotate for a period of time → 5# saponification tank, soak and rotate for a period of time → finally crane out, rotate the drum, and air cool → the material frame is not obvious, and it can be used after the water is discharged.

[0019] Preferably, the phosphating tank contains a phosphating liquid, the pH value of the phosphating tank is 2.5-3.0, and the saponifying tank contains a saponifying powder.

[0020] Preferably, the steel may be normalized in a mesh belt furnace after the isothermal spheroidizing annealing in step S3.

[0021] Preferably, the normalizing treatment is as follows: first, check the material before loading it onto the mesh belt → heat up to 960±10℃ → keep warm at 960±10℃ → keep warm at 960±10℃ → keep warm at 960±10℃ → keep warm at 960±10℃ → finally take it out of the furnace.

[0022] Preferably, the mesh belt furnace is a continuous mesh belt roller normalizing furnace.

[0023] 3. Technical effects to be achieved

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Firstly, the present invention uses a round steel cutting machine to cut the bar material to obtain the blank, the bar material does not need to be heated, and the material is directly cut without saw seam loss, which is more conducive to reducing waste.

[0026] Secondly, the present invention does not need to use graphite emulsion to cool the mold, which greatly reduces the cost investment on the one hand, and is also beneficial to the poor working environment of workers due to the poor on-site environment of using graphite emulsion cooling medium, which is not conducive to the work of the staff and the work of later workers.

[0027] Thirdly, the treated material of the present invention is subjected to a first cold extrusion molding machine for a first cold extrusion, and then subjected to a second cold extrusion molding machine for a second cold extrusion, to finally obtain a finished product, which has higher strength than the product of medium-temperature extrusion in the prior art and can better meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic block diagram of the present invention.

[0029] Figure 2 It is a schematic diagram of temperature change in the bell-type annealing furnace of the present invention.

[0030] Figure 3 It is a schematic diagram of the running time of the crawler shot blasting machine in the present invention.

[0031] Figure 4 It is a schematic diagram of the phosphorus saponification treatment block in the present invention.

[0032] Figure 5 It is a schematic diagram of temperature change during normalizing treatment in the mesh belt furnace of the present invention. DETAILED DESCRIPTION

[0033] In the description of the present invention, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0034] In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invention product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0037] Example 1: See Figure 1 , a process method for a universal joint, comprising the following steps:

[0038] S1, cutting the bar material by a round steel cutting machine to obtain a blank;

[0039] The round steel cutting machine used is the LYQ-50 round steel cutting machine produced by Taizhou Beili Machinery Co., Ltd. The LYQ-50 round steel cutting machine is a precision bar cutting machine. This round steel cutting machine is more reliable, the cutting accuracy can better meet the use requirements, the performance is more stable, and the use of circular saws is avoided. This helps to avoid the increase of raw materials and the occurrence of sawing seam loss costs, greatly reducing costs and resource consumption, and is also conducive to using the cutting machine to cut materials without sawing seam loss.

[0040] S2, subjecting the blank to isothermal spheroidizing annealing in a bell-type annealing furnace to obtain a primary material;

[0041] like Figure 2 As shown, check before the hood-type annealing furnace → heat up (heat to 870℃±10℃) → cool down to 870℃±10℃, keep warm for 90 minutes±30 minutes, cool down to 840℃±10℃ → keep warm at 840℃±10℃, keep warm for 700 minutes±30 minutes → cool down, the temperature drops to 630℃, and then lift out the heating cover. Notes during operation: A special airtight device must be placed in the center of the special container in front of the hood-type annealing furnace, and the start temperature of the insulation timing is based on the instrument that reaches the set temperature first, and the instrument with the highest temperature in the upper and lower zones of the hanging heating cover is based. The temperature difference between the upper and lower zones of each instrument in the insulation period of the same control cabinet should be ≤ 20℃, and the thermocouple must be kept in contact with the furnace tank when used.

[0042] S3, the initial material is shot blasted by a crawler-type shot blasting machine to obtain the waiting material;

[0043] Among them, the crawler shot blasting machine adopts the Q3210 crawler shot blasting machine produced by Yancheng Shengda Technology Co., Ltd. Since the crawler shot blasting machine is a high-strength wear-resistant rubber crawler or a manganese steel crawler to load the workpiece, it uses a high-speed rotating impeller to throw the projectile onto the workpiece in the chamber to achieve the purpose of cleaning. It is suitable for sand cleaning, rust removal, oxide skin removal and surface strengthening of small castings, forgings, stampings, gears, springs and other parts, and is particularly suitable for cleaning and strengthening of parts that are not afraid of collision.

[0044] like Figure 3 As shown, the steps for the crawler shot blasting machine are: first load → close the door and start the machine → blast for 20-50 minutes → stop, inspect and discharge. The crawler shot blasting machine uses steel sand for shot blasting (shot blasting steel sand), and all steel sand for shot blasting (shot blasting steel sand) are used. The time to add sand and shot is when the ammeter indicates a value less than 10A during the operation of the equipment, and then add sand and shot until the ammeter indicates a value between 10 and 20A.

[0045] S4, subjecting the material to be treated to a phosphorus saponification surface treatment to obtain a treated material;

[0046] Among them, phosphorus saponification surface treatment is a common surface treatment technology, which is usually used for surface modification of metal or alloy materials. Simply put, phosphorus saponification surface treatment is to cover a layer of soap substances containing phosphorus compounds on the metal surface to achieve the purpose of enhancing the corrosion resistance, lubricity and adhesion of the material surface, thereby improving the mechanical properties and service life of the material. The main principle of the phosphorus saponification surface treatment of the present invention is to increase the surface activity of the material by forming a thin film on the metal surface, and improve the lubricity and corrosion resistance of the material surface. The formation mechanism of this surfactant is similar to that of a surfactant. It can form a spontaneous protective film on the metal surface, thereby protecting the metal, preventing corrosion and reducing friction.

[0047] The phosphorus saponification surface treatment is specifically as follows: Figure 4 As shown, put the material to be processed into the crane processing tank, then close the door → go to the 1# cold water tank, soak and rotate for a period of time (30 seconds to 3 minutes) → 2# hot water tank (water temperature 65℃~75℃), soak and rotate for a period of time (30 seconds to 5 minutes) → 3# phosphating tank (water temperature 65℃~75℃), soak and rotate for a period of time (10 minutes to 20 minutes) → 4# hot water tank (water temperature 65℃~75℃), soak and rotate for a period of time (30 seconds to 5 minutes) → 5# saponification tank (water temperature 50℃~65℃), soak and rotate for a period of time (3 minutes to 10 minutes) → finally crane out, rotate the drum, and air cool → the material frame is not obvious, and the water can be used. Further explanation, there is phosphating liquid in the phosphating tank, the pH value of the phosphating tank is 2.5~3.0, and there is saponification powder in the saponification tank. This setting is reasonable and easy to implement.

[0048] Among them, the proportion of phosphating liquid is:

[0049] The proportion of saponified powder is:

[0050] During use, after processing 15 to 20 tons of product weight each time, the phosphating liquid and saponifying powder are added once (one portion of agent).

[0051] Furthermore, the processed material can be weighed, which is helpful for finding out whether it meets the indicators and for eliminating defective products.

[0052] S5, the processed material is subjected to a first cold extrusion molding machine for a first cold extrusion, and then subjected to a second cold extrusion molding machine for a second cold extrusion, to finally obtain a finished product.

[0053] Embodiment 2: Based on the embodiment 1, the normalizing treatment can be performed after the isothermal spheroidizing annealing in step S3, which is beneficial to significantly enhance the toughness, reduce the cracking tendency of the component, and better meet the use requirements. The normalizing treatment is achieved by a mesh belt furnace. The normalizing treatment is performed in the mesh belt furnace as follows: Figure 5 As shown: First, check the material before loading the mesh belt → heat up to 960±10℃ (actually measured greater than 650℃) → keep warm at 960±10℃ (actually measured greater than 750℃) → keep warm at 960±10℃ (actually measured greater than 850℃) → keep warm at 960±10℃ → keep warm at 960±10℃ → finally take out of the furnace. This can be processed automatically, and can enhance toughness through normalizing and reduce the cracking tendency of components. Further explanation: the mesh belt furnace is a continuous mesh belt roller normalizing furnace (produced by Changxing Zhebei Electric Furnace Manufacturing Plant).

[0054] The rods of the present invention do not need to be heated, and do not need to use a graphite emulsion cooling mold, so that the product blank can be formed without cold extrusion and heating, which is beneficial to avoid the situation where the power consumption of heating the rods is extremely high, and is also beneficial to avoid the poor on-site environment caused by the use of graphite emulsion cooling medium, which is not conducive to the work of workers, and is not conducive to the recruitment of enterprises. It is more difficult to recruit workers, and is also beneficial to avoid the high cost of the mold, which increases the cost investment, and is also beneficial to improve the service life. The present invention also avoids the use of warm extrusion molding in the existing technology, because the warm extrusion molding mold is a closed mold, which requires a high gram weight requirement, and the unstable gram weight is easy to damage the mold. In the present invention, there is a space for making way in the cold extrusion molding mold, and it is no longer a closed mold, so the mold life is more than doubled, and the strength of the product produced by cold extrusion molding of the present invention is higher than that of the product produced by warm extrusion.

[0055] The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part adopt conventional means such as mature bolts and rivets in the prior art. The internal components of the round steel cutting machine, hood annealing furnace, crawler shot blasting machine, mesh belt furnace and cold extrusion molding machine all adopt conventional models in the prior art, and their internal structures belong to the prior art structure. Workers can complete normal operation of them according to the existing technical manual. In addition, the circuit connection adopts the conventional connection method in the prior art, and no specific description is given here.

[0056] It should be noted that, although the above embodiments have been described in this article, the scope of patent protection of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields are all included in the scope of protection of the patent of the present invention.

Claims

1. A process for a universal joint, characterized in that: The steps include: S1. Cutting the bar material by a round steel cutting machine to obtain a blank; S2, subjecting the blank to isothermal spheroidizing annealing treatment in a bell-type annealing furnace to obtain a primary material; S3, the initial material is shot blasted by a crawler-type shot blasting machine to obtain the waiting material; S4, subjecting the material to be treated to a phosphorus saponification surface treatment to obtain a treated material; S5, the processed material is subjected to a first cold extrusion molding machine for a first cold extrusion, and then subjected to a second cold extrusion molding machine for a second cold extrusion, to finally obtain a finished product.

2. The process of the universal joint according to claim 1, characterized in that: In step S1, the round steel cutting machine used is a round steel cutting machine of model LYQ-50 produced by Taizhou Beili Machinery Co., Ltd.

3. The process of the universal joint according to claim 1, characterized in that: In step S2, first, the hood-type annealing furnace is inspected, heated, cooled, and then kept warm. Next, the temperature is cooled again, and then kept warm. Then, the temperature is kept warm again, and then cooled again, and finally, the heating hood is lifted out.

4. The process of making a universal joint according to claim 1, characterized in that: The belt shot blasting machine used in step S3 is a Q3210 crawler shot blasting machine produced by Yancheng Shengda Technology Co., Ltd.

5. The process for producing a universal joint according to claim 1, characterized in that: In step S3, the specific operation of the crawler shot blasting machine is: first loading → closing the door and starting the machine → shot blasting for 20-50 minutes → stopping, inspecting and discharging.

6. The process for producing a universal joint according to claim 1, characterized in that: In step S4, the phosphating saponification surface treatment is specifically as follows: load the material to be processed into the crane treatment tank, then close the door → go to 1# cold water tank, soak and rotate for a period of time → 2# hot water tank, soak and rotate for a period of time → 3# phosphating tank, soak and rotate for a period of time → 4# hot water tank, soak and rotate for a period of time → 5# saponification tank, soak and rotate for a period of time → finally crane out, rotate the drum, and air cool → the material frame is not obvious, and it can be used after the water is discharged.

7. The process for producing a universal joint according to claim 6, characterized in that: The phosphating tank contains phosphating liquid, the pH value of the phosphating tank is 2.5-3.0, and the saponifying tank contains saponifying powder.

8. The process for making a universal joint according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that: After the isothermal spheroidizing annealing in step S3, the steel may be subjected to normalizing treatment in a mesh belt furnace.

9. The process for producing a universal joint according to claim 8, characterized in that: The normalizing treatment is as follows: first, check the material before loading it onto the mesh belt → heat up to 960±10℃ → keep warm at 960±10℃ → keep warm at 960±10℃ → keep warm at 960±10℃ → keep warm at 960±10℃ → finally take it out of the furnace.

10. The process for producing a universal joint according to claim 8, characterized in that: The mesh belt furnace is a continuous mesh belt roller normalizing furnace.

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