TWI535857B - Carburized Vos Tempering Slider for Linear Slide and Its Manufacturing Method - Google Patents

Description

Carburized Woos tempering slider for linear slide and manufacturing method thereof

The invention relates to a slider for a linear slide rail and a manufacturing method thereof, in particular to a carburized Voss tempering slider which is formed with a toughened iron hardened surface layer and which can extend the service life and a manufacturing method thereof .

According to the continuous development of precision feed systems, linear drive technology and its products have become the most important part of many precision machines, such as linear slides, ball screws, etc., especially linear slides have been widely installed. On many precision machine tools, it can improve the precision, smoothness, stability and service life of the components.

The general linear slide includes a slider 10 and a slide rail 20. As shown in Fig. 1, the key component of the linear slide rail is the slider 10, which directly affects the service life of the equipment, the production efficiency, and the quality and cost of the equipment. However, the conventional slider 10 will form a surface of the granulated iron when formed through the old process. When used for a period of time, the slider 10 often fails due to insufficient fatigue performance or cracking, and in recent years, the linear slide is used due to the machine. The speed of operation increases, so the failure of the slider 10 of the linear slide during movement will cause serious problems to the system.

Furthermore, when the conventional technique uses oil quenching for heat treatment, when the high-temperature parts are cooled from about 820-950 degrees Celsius to 60-150 degrees Celsius, the parts are also immediately converted from the Worth Iron to the Ma Tian Iron. In the quenching, because the volume of the two kinds of tissues is different, and the shape of the slider is also irregular, the surface layer and the inner layer have a large thickness and a small thickness, and when the volume is changed, there is a certain time difference and a distortion caused by a different volume. and so The heat treatment method of Vostian Iron immediately converted to Ma Tian Iron, in addition to the volume increase, it is accompanied by a certain degree of distortion; therefore, the Worth Iron immediately transformed into the heat treatment of the Ma Tian Iron, showing a no The amount of deformation of the rule, therefore, the initial processing before heat treatment, must be reserved for a larger amount of grinding. In addition to the high processing cost, it is also necessary to lengthen the heat treatment time in order to obtain a larger carburized layer depth and further increase the cost.

In view of the above problems of the prior art, the object of the present invention is to provide a carburized Voss tempering slider for a linear slide and a manufacturing method thereof, so as to solve the problem that the conventional slider is easily broken or cracked due to fatigue performance. The problem of failure.

In accordance with the purpose of the present invention, a carburized Voss tempering slider for a linear slide is provided, comprising: a substrate movably disposed on a slide rail; and at least one hardened surface layer subjected to carburization The Voss temper heat treatment to form on the substrate.

Preferably, the carburized Worth tempering slider further comprises a joint layer which is subjected to a carburized Worth tempering heat treatment to be formed between the substrate and the at least one hardened skin layer.

Preferably, the substrate is made of metal.

Preferably, at least one of the hardened skin layers is a high carbon toughened iron structure.

Preferably, the tie layer is a toughened iron structure.

Preferably, the bonding layer is a mixed structure of toughened iron and 麻田散铁.

In accordance with the purpose of the present invention, a carburized Voss tempering slider for a linear slide is further provided, comprising: a substrate made of metal, the substrate being movable on a slide rail; At least one hardened skin layer is subjected to a carburized Worth tempering heat treatment to form on the substrate, and the hardened surface layer is a high carbon toughened iron structure.

According to the object of the present invention, a method for manufacturing a carburized Wouss tempering slider is further provided, which comprises the following steps: initial processing a slider blank to cut the slider blank into a desired volume; The initial processing of the slider blank is in the gas The atmosphere is heated to 820 degrees Celsius to 1000 degrees Celsius to carry out the Wolsfield iron solution treatment and surface carburization treatment on the slider blank, thereby forming a slider that is close to the finished product; placing the slider on the slider Austempering is performed in the salt bath to cool down to 160 degrees Celsius to 400 degrees Celsius; the slider is removed from the salt bath for cleaning and drying procedures; and the slider is tempered again (Tempering Treatment) After that, the slider is cooled to room temperature, thereby producing a carburized Voss tempering slider having a hardened surface layer formed as a toughened iron structure.

Preferably, the slider is cooled to room temperature by means of air cooling or air cooling.

Preferably, the method for manufacturing the carburized Worth tempering slider further comprises the following steps: grinding and polishing the carburized Worth tempering slider.

Preferably, the carburized Voss tempering slider has a Rockwell hardness of 35 to 60 degrees.

Preferably, the carburized Voss tempering slider has a strength of 900 to 2200 Newtons per square millimeter.

Preferably, the atmosphere protecting the atmosphere may be a mixed gas of carbon monoxide, hydrogen and nitrogen.

As described above, the carburized Voss tempering slider for linear slides produced by the present invention has a hardened surface layer of high carbon toughened iron structure on the surface thereof, or a layer of deformation under the hardened surface layer. The joint layer of tough iron and 麻田散铁 mixed structure can greatly improve the fatigue performance of the material, effectively improve the surface peeling of the low carbon alloy steel slider, and achieve an increase in surface compressive stress and no crack in the tough iron grain boundary. Extend the life of the linear slide.

10‧‧‧Carburizing Voss tempering slider

11‧‧‧Substrate

12‧‧‧ hardened surface

13‧‧‧Layer

20‧‧‧Slide rails

S1~S6‧‧‧Steps

Figure 1 is a schematic view of a slider of the prior art.

Figure 2 is the first carburized Woos tempering slider for linear slides of the present invention A first schematic of an embodiment.

Figure 3 is a second schematic view of a first embodiment of a carburized Voss tempering slider for a linear slide of the present invention.

Figure 4 is a schematic view of a second embodiment of a carburized Voss tempering slider for a linear slide of the present invention.

Fig. 5 is a flow chart showing a method of manufacturing a carburized Voss tempering slider of the present invention.

Fig. 6 is a schematic view showing the comparison of the rotational bending fatigue properties of the carburized Worth tempering slider of the present invention and the prior art.

Fig. 7 is a schematic view showing the comparison of the load and failure periods of the carburized Worth tempering slider of the present invention and the prior art.

Figure 8 is a metallographic structure diagram of the carburized Voss tempering slider of the present invention.

The technical features, contents, and advantages of the present invention, as well as the advantages thereof, can be understood by the present inventors, and the present invention will be described in detail with reference to the accompanying drawings. The subject matter is only for the purpose of illustration and description. It is not intended to be a true proportion and precise configuration after the implementation of the present invention. Therefore, the scope and configuration relationship of the attached drawings should not be interpreted or limited. First described.

Please refer to FIG. 2 and FIG. 3 , which are respectively a first schematic diagram and a second schematic diagram of a first embodiment of a carburized Voss tempering slider for a linear slide according to the present invention. In the first embodiment, the slider 10 includes a substrate 11 and at least one hardened surface layer 12, and the slider 10 is movably disposed on the slide rail 20, wherein the substrate 11 is made of metal, preferably made of Made of low carbon alloy steel. In the technique of the carburized Worth tempering heat treatment of the present invention, the carburizing process is followed by a Wars tempering process of selectable temperature, at least one of the hardened skin layers 12 will be converted to high during the Voss tempering process. A tough iron structure of carbon is formed on the substrate 11. The carburized Worth tempering heat treatment is a stable process and has many advantages over the quenching and tempering heat treatment technology. by The formation of toughened iron is a change in a single temperature for many minutes or several hours, so that the amount of deformation can be greatly reduced, and there is no problem of cracking, and the hardened surface layer 12 can greatly improve the fatigue performance of the material, and is effective. The problem of peeling off the surface of the slider 10 is improved, and the service life of the linear slide 20 is extended.

Next, please refer to FIG. 4, which is a schematic view of a second embodiment of a carburized Voss tempering slider for a linear slide according to the present invention. During the tempering of the above-mentioned Worth to form the hardened surface layer 12, under the hardened surface layer 12, above the substrate 11, a joint layer 13 of toughened iron structure, or a mixed structure of toughened iron and granulated iron is formed. The tie layer 13 is capable of providing the slider 10 with sufficient strength and toughness.

Please refer to FIG. 5, which is a flow chart of a method for manufacturing a carburized Voss tempering slider according to the present invention, and the process steps are as follows:

Step S1: Initial processing a slider blank to cut the slider blank into a desired volume. In this step, when the slider blank is formed, the slider blank can be machined, and the heat treatment deformation is considered when processing.

Step S2: heating the initial processing of the slider blank in an atmosphere protection environment to 820 to 1000 degrees Celsius, in order to carry out the Woltian iron solution treatment and surface carburization treatment on the slider blank, thereby forming a trend Close to one of the finished sliders. This step is to send the blank blank after the initial processing to the automatic salt quenching production line under the atmosphere protection and computer control. The protective atmosphere can avoid the oxidative decarburization of the surface of the workpiece. The computer control can avoid the influence of human factors and send it to the whole. The slider blank of the automatic salt quenching production line can be subjected to a heating process, the purpose of which is to have a hardened surface layer on the surface of the slider, and to homogenize the substrate, so that the substrate is completely metamorphosed into a Worthite iron, and the surface carburizing amount, It also changes the starting point of the transition temperature of the granulated iron.

Step S3: The slider is placed in the salt bath to cool down to 160 degrees Celsius to 400 degrees Celsius, and then the slider is subjected to Austempering. Among them, slip The block needs to be rapidly cooled in the salt bath to avoid the generation of iron and iron, which affects the microstructure and mechanical properties of the material.

Step S4: The slider is taken out from the salt bath for cleaning and drying procedures.

Step S5: After the slider is again subjected to Tempering Treatment, the slider is cooled to room temperature, thereby producing a carburized Voss tempering slider having a hardened surface layer which is a toughened iron structure. Among them, the hardness of the carburized Voss tempering slider can reach Rockwell hardness of 35~60 degrees, and the strength can reach 900~2200 N/mm.

Step S6: grinding and polishing the carburized Worth tempering slider.

In the above, the slider is subjected to carburizing Voss tempering in an atmosphere-protected quenching furnace in a fully automatic salt quenching production line, the quenching furnace is a three-chamber structure, three chambers are sealed and protected in atmosphere Work in the environment, protect the environment in the atmosphere and fully automatic computer control, avoid the influence of human factors, and the quality is more stable. The front chamber is a quenching chamber, the middle is a transition chamber, the rear chamber is a heating chamber, and the three chambers are sealed by a sealing door; and the atmosphere protects the atmosphere from being sealed by nitrogen and methanol into the heating chamber and then cracked to 20%. Carbon monoxide (CO), 40% hydrogen (H ₂ ) and 40% nitrogen (N ₂ ) are formed. The function of the front chamber is to perform the metallurgical transformation quenching of the Worthite iron. The front chamber contains a salt tank, a heating system, a stirring system, a diversion system, a heat exchange system, an atmosphere protection and water supply system, an exhaust gas combustion exhaust system, and a lift. Organization, front door fire curtain and front door, middle door mechanism, etc. The quenching process is carried out after the chamber heating and heat preservation, and the Worthfield ironing slider is pushed to the transition chamber and quickly pushed to the front chamber elevator under the atmosphere protection. After the transition door is closed, it is rapidly lowered in the salt bath of the flow quenching salt bath. The Voss tempering transformation is carried out. After the end of the transformation, the elevator rises and drains the salt, and then the front door is opened and the front door is pulled out by the front door of the fire curtain to clean the workpiece and prevent rust.

The function of the transition chamber is to quench the salt bath atmosphere of the front chamber and the furnace of the back chamber. The internal atmosphere is separated, and the mixed atmosphere is discharged to the outside of the furnace through the exhaust port. The transition chamber contains a transmission mechanism, an atmosphere injection system, an exhaust gas combustion exhaust system, and a service port. The working process is that after the workpiece is preheated, it is sent to the transition chamber through the front chamber to burn the incoming air, and then sent to the rear chamber for heat treatment. After the process of the back chamber is sent to the transition chamber and then sent to the front chamber for quenching. In the two processes entering the transition chamber, there is atmosphere protection to prevent oxidation and decarburization of the workpiece and to maintain a positive pressure state in the furnace.

The function of the back chamber is to perform heating, holding or carburizing processes. The rear chamber includes a rear drive system, a top stirring system, a heating system, a temperature atmosphere measurement and analysis control system, a heat-resistant chain rail, a middle door mechanism, and the like. The working process is to heat the workpiece entering the back chamber to the ferrite temperature of the Vostian and to carburize and heat the temperature at this temperature, so that the surface carburizing and the Worthite iron structure are obtained and then sent to the front chamber for quenching. The entire process is carried out in a sealed furnace and protected by an atmosphere with a positive pressure in the furnace. The heating method can be electric heating or gas heating. The radiant tube adopts large-diameter high-temperature material, the temperature uniformity is positive/negative 5 degrees Celsius, the top stirring fan has large flow and large circulation, and multi-drop injection ensures uniform atmosphere.

Please refer to FIG. 6 , which is a schematic diagram of the comparison of the rotational bending fatigue performance of the carburized Worth tempering slider of the present invention and the prior art. As can be seen from the figure, in the same finished material (AISI 8620 steel, surface hardness HRC55), the carburized Voss tempering slider obtained by the carburized Voss tempering manufacturing method of the present invention is compared with The slider produced by the conventional method has better fatigue strength. For example, the test is also performed with a stress of 124 kilograms. The conventional slider fails after about 4th order of 10, and the carburized Voss tempering slider of the present invention is only after 10 times of 10 times. Will fail. In addition, reference can be made to Fig. 7, which is a schematic diagram of the comparison of the load and failure periods of the carburized Worth tempering slider of the present invention and the prior art, as can be seen from Fig. 7, under the same load The fatigue fatigue strength of the present invention and the conventional ones start at 10,500 lbs and 9,000 lbs, respectively, and it can be seen that the present invention fails after more cycles, compared to conventional It has better fatigue strength. Furthermore, referring to Fig. 8, which is a metallographic structure diagram of the carburized Voss tempering slider of the present invention, it can be seen from the figure that the metallographic structure of the present invention is fine and crack-free, and can reduce the origin of fatigue failure. The crack occurred.

In summary, the carburized Voss tempering slider for linear slides produced by the process of the present invention can have the following advantages:

1. It can greatly improve the fatigue strength in the case of high load and low cycle.

2. High tensile strength.

3. Increase the elongation rate.

4, can greatly improve the impact performance.

5, can improve wear resistance.

6. It is more difficult to avoid cracking.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

10‧‧‧Carburizing Voss tempering slider

11‧‧‧Substrate

12‧‧‧ hardened surface

20‧‧‧Slide rails

Claims (6)

A method for manufacturing a carburized Voss tempering slider, comprising the steps of: initializing a slider blank to cut the slider blank into a desired volume; The slider blank is heated to 820 degrees Celsius to 1000 degrees Celsius in an atmosphere protection environment, and the slider blank is subjected to Wolster iron solution treatment and surface carburization treatment, thereby forming a slider which is close to the finished product. The slider is placed in a salt bath to cool down to 160 degrees Celsius to 400 degrees Celsius for tempering (Austempering); the slider is taken out of the salt bath for cleaning and drying procedures; and the slider is After the Tempering Treatment is again performed, the slider is cooled to room temperature, thereby producing a carburized Voss tempering slider having a hardened surface layer which is a toughened iron structure formed on the surface. The method for manufacturing a carburized Wouss tempering slider according to claim 1, wherein the slider is cooled to room temperature by air cooling or air cooling. The method for manufacturing a carburized Wouss tempering slider according to claim 1, further comprising the step of: grinding and polishing the carburized Worth tempering slider. The method for manufacturing a carburized Voss tempering slider according to claim 1, wherein the carburized Voss tempering slider has a Rockwell hardness of 35 to 60 degrees. The method for manufacturing a carburized Voss tempering slider according to claim 1, wherein the carburized Voss tempering slider has a strength of 900 to 2200 Newtons per square millimeter. The method for producing a carburized Wouss tempering slider according to claim 1, wherein the atmosphere protecting the atmosphere is made up of 20% carbon monoxide (CO), 40% hydrogen (H ₂ ) and 40% nitrogen (N). ₂₎ formed.