Machine tool guide rail steel part heat treatment equipment

Abstract

The invention relates to the field of quenching machining of guide rail steel, in particular to heat treatment equipment for machine tool guide rail steel parts. According to the heat treatment equipment for the machine tool guide rail steel parts, a quenching heater for quenching and heating a steel rail is installed in a quenching cabin, and the outlet end structure and the inlet end structure of the quenching cabin are each provided with a liquid spraying pipe surrounding the outer side of the steel rail; the two liquid spraying pipes are used for carrying out warm water cleaning treatment and water cooling treatment on the steel rail correspondingly, cooling liquid sprayed to the steel rail by the two liquid spraying pipes can be matched with the surrounding frame to form a water curtain, and the waste phenomenon that protective gas escapes outwards is reduced; high-temperature steam floating into the quenching cabin can be collected in time, and meanwhile high-temperature protective gas in the quenching cabin can be cooled. The technical defects of waste of a large amount of protective gas and interference of a large amount of high-temperature steam in the quenching heating treatment process of guide rail steel of a machine tool are overcome.

Description

Technical Field

[0001] The present invention relates to the field of guide rail steel quenching processing, in particular to a heat treatment device for machine tool guide rail steel parts. Background Art

[0002] As a core component of precision machinery, the wear resistance and dimensional stability of machine tool guide rail steel directly affect machining accuracy. Currently, high-carbon alloy steel is the mainstream guide rail steel. Quenching treatment is required to improve surface hardness and fatigue life. The steel must undergo warm water cleaning, moisture drying, quenching and heating, and water cooling. If necessary, low-temperature tempering is also required. Due to the long overall length of the machine tool guide rail steel, it is impossible to place the entire guide rail steel in a quenching furnace for heating. Therefore, a movable quenching heater is used to quench and heat each area of ​​the guide rail steel in sequence. At the same time, a cooling sprayer is used to continuously cool and spray the guide rail steel in the quenched and heated areas following the quenching heater. Because the quenching heater lacks a housing, during the quenching and heating process, not only is a large amount of protective gas wasted by escaping into the air, but a large amount of high-temperature steam generated by the cooling spraying treatment also adheres to the guide rail steel in the quenching and heating area, interfering with the quenching and heating work and affecting the quenching and heating effect of the guide rail steel. Summary of the Invention

[0003] In order to overcome the shortcomings of large amount of shielding gas waste and large amount of high temperature steam interference in the quenching and heating treatment process of machine tool guide rail steel, the present invention provides a machine tool guide rail steel parts heat treatment equipment.

[0004] The technical solution of the present invention is: a heat treatment equipment for machine tool guide rail steel parts, including a conveyor machine, a waste liquid pipe, a quenching chamber, an air pipe, a quenching heater and a spray pipe; the conveyor machine is fixedly connected to the quenching chamber, and an outlet end structure and an inlet end structure are respectively provided on both sides of the quenching chamber; a waste liquid tank structure is provided on the conveyor machine; a quenching heater for quenching and heating the steel rail is installed in the quenching chamber; the quenching chamber is connected to a gas pipe for conveying protective gas to the steel rail; the outlet end structure and the inlet end structure of the quenching chamber are each fixedly connected to a spray pipe, and the spray pipe is connected to a plurality of liquid outlet structures for spraying coolant onto the surface of the steel rail; the waste liquid tank structure of the quenching chamber is connected to the waste liquid pipe.

[0005] Preferably, a plurality of drainage holes are provided at the bottom of the quenching chamber.

[0006] Preferably, a liquid outlet pipe is connected to the liquid drain hole.

[0007] Preferably, the liquid outlet pipe is a communicating vessel with a water sealing effect.

[0008] Preferably, the outlet end structure and the inlet end structure of the quenching chamber are each fixedly connected to a surrounding frame surrounding the outside of the steel track, and the liquid outlet nozzle structure of the liquid spray pipe is located inside the corresponding surrounding frame.

[0009] Preferably, the front side and the rear side of the enclosing frame are each connected to a steam cooler; and the quenching chamber is fixedly connected with a diversion pipe for conveying coolant to each steam cooler respectively.

[0010] Preferably, the steam cooler consists of a cylindrical shell, a suction fan and a water-cooling column; the cylindrical shell is fixedly connected to the enclosing frame; a plurality of air inlet structures are opened on the side of the cylindrical shell facing the corresponding enclosing frame; a suction fan is installed at the bottom of the cylindrical shell; a water-cooling column with a hollow tube structure is fixedly connected to the cylindrical shell; and the diversion pipe is connected to the water-cooling column.

[0011] Preferably, a spiral guide strip structure is provided on the outer surface of the water-cooling column.

[0012] Preferably, a temperature measuring instrument for monitoring the temperature of the quenching area of ​​the continuous steel rail is installed on the quenching chamber.

[0013] Preferably, the bottom of the quenching chamber is slidably connected to a movable plate; the liquid outlet pipe is fixedly connected to the movable plate; the liquid outlet pipe is plugged into the corresponding drainage hole; an electric push rod is installed at the bottom of the quenching chamber; the telescopic ends of the electric push rod are respectively fixedly connected to the movable plate.

[0014] The beneficial effects of the present invention are as follows: a heat treatment equipment for machine tool guide rail steel parts of the present invention is provided with a quenching heater for quenching and heating the steel rail in a quenching chamber, a spray pipe is respectively provided at the outlet end structure and the inlet end structure of the quenching chamber and surrounded by the outside of the steel rail, the two spray pipes respectively perform warm water cleaning treatment and water cooling treatment on the steel rail, and the coolant sprayed to the steel rail by the two spray pipes can cooperate with the surrounding frame to form a water curtain, thereby reducing the waste of protective gas escaping to the outside, and a steam cooler is also provided in the quenching chamber, which can timely collect the high-temperature steam drifting to the inside of the quenching chamber, and at the same time can also cool the high-temperature protective gas inside the quenching chamber; the technical defects of a large amount of protective gas waste and a large amount of high-temperature steam interference in the quenching and heating treatment process of the guide rail steel of the machine tool are overcome. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A perspective view illustrating the present invention;

[0016] Figure 2 A perspective view illustrating the steel rail conveying state of the present invention;

[0017] Figure 3 A perspective view of the quenching chamber of the present invention is described;

[0018] Figure 4 Describe the three-dimensional view of the liquid outlet pipe of the present invention;

[0019] Figure 5 A cutaway perspective view of a quench chamber depicting the present invention;

[0020] Figure 6 A perspective view of the liquid spray pipe of the present invention is described;

[0021] Figure 7 A perspective view of a cutaway cartridge shell illustrating the present invention.

[0022] Figure numerals: 1-transfer machine tool, 101-waste liquid tank structure, 11-waste liquid pipe, 2-quenching chamber, 201-drain hole, 21-air pipe, 22-liquid outlet pipe, 23-thermometer, 3-quenching heater, 4-spray pipe, 401-liquid outlet nozzle structure, 5-enclosing frame, 6-steam cooler, 61-cylinder shell, 601-air inlet structure, 62-suction fan, 63-water cooling column, 64-spiral guide strip, 65-diverter pipe, 71-movable plate, 72-electric push rod, 8-steel rail. DETAILED DESCRIPTION

[0023] The following description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0024] Example 1: A heat treatment device for machine tool guide rail steel parts of the present invention, such as Figures 1-6 As shown, it includes a conveyor tool 1, a waste liquid pipe 11, a quenching chamber 2, an air supply pipe 21, a quenching heater 3 and a liquid spraying pipe 4; the quenching chamber 2 is fixedly connected to the conveyor tool 1, and the left and right sides of the quenching chamber 2 are respectively provided with an outlet end structure and an inlet end structure; the conveyor tool 1 is provided with a waste liquid tank structure 101 aligned with the bottom of the quenching chamber 2; a quenching heater 3 for quenching and heating the steel rail 8 is installed in the quenching chamber 2; the quenching chamber 2 is connected to a gas supply pipe 21 for supplying protective gas to the steel rail 8, and the gas supply pipe 21 is externally connected to a protective gas delivery device; the outlet end structure and the inlet end structure of the quenching chamber 2 are each fixedly connected to a spray pipe 4, the spray pipe 4 of the inlet end structure is externally connected to a coolant delivery device with a higher temperature, and the spray pipe 4 of the outlet end structure is externally connected to a coolant delivery device with a lower temperature, and the spray pipe 4 is connected to a plurality of liquid outlet structures 401 that spray coolant from all directions to the surface of the steel rail 8; the waste liquid tank structure 101 of the quenching chamber 2 is connected to a waste liquid pipe 11, and the waste liquid pipe 11 is externally connected to a waste liquid treatment device.

[0025] like Figure 5 and Figure 6As shown, two drainage holes 201 are respectively provided on the front and rear sides of the bottom of the quenching chamber 2; each of the four drainage holes 201 is connected to a liquid outlet pipe 22; the four liquid outlet pipes 22 all use an S-shaped communicating vessel, and the U-shaped pipe structure in the communicating vessel is filled with coolant as a water seal; the outlet end structure and the inlet end structure of the quenching chamber 2 are each fixedly connected to a surrounding frame 5 surrounded by the outside of the steel track 8, and the liquid outlet nozzle structure 401 of the spray pipe 4 is located on the inner side of the corresponding surrounding frame 5; the front and rear sides of the two surrounding frames 5 are each connected to a steam cooler 6; a shunt pipe 65 is fixed to the quenching chamber 2 for transporting coolant to each steam cooler 6, and the shunt pipe 65 is externally connected to a low-temperature coolant transporting device.

[0026] The working principle of the heat treatment equipment for machine tool guide rail steel parts of the present invention is as follows.

[0027] First, the conveying machine 1 sequentially conveys each area of ​​the steel rail 8 to the quenching heater 3 passing through the quenching chamber 2. When the steel rail 8 passes through the enclosing frame 5 and the spray pipe 4 of the inlet end structure of the quenching chamber 2, the external coolant delivery device with a higher temperature continuously delivers the coolant with a higher temperature to the spray pipe 4 of the inlet end structure. The spray pipe 4 continuously sprays the coolant with a higher temperature from all directions to the area of ​​the steel rail 8 located in the enclosing frame 5 through the liquid outlet structure 401. The coolant with a higher temperature continuously performs warm water cleaning on the area of ​​the steel rail 8 entering the quenching chamber 2, and the cleaning wastewater is discharged along the waste liquid tank structure 10 1 and the waste liquid pipe 11 flow to the external waste liquid treatment equipment. At the same time, the high-temperature coolant sprayed from the spray pipe 4 forms a continuous water curtain between the steel rail 8 under the restriction of the enclosing frame 5. After the steel rail 8 enters the quenching chamber 2, the high-temperature radiation generated by the quenching heater 3 sequentially performs moisture drying and quenching heating on the corresponding areas of the steel rail 8. When the steel rail 8 passes through the enclosing frame 5 and the spray pipe 4 of the outlet end structure of the quenching chamber 2, the external low-temperature coolant delivery equipment continuously delivers low-temperature coolant to the spray pipe 4 of the inlet end structure. The spray pipe 4 continuously sprays the low-temperature coolant from all directions to the area of ​​the steel rail 8 located in the enclosing frame 5 through the liquid outlet structure 401. The low-temperature coolant continuously performs water cooling on the area of ​​the steel rail 8 that exits the quenching chamber 2. The wastewater flows along the waste liquid tank structure 101 and the waste liquid pipe 11 to the external waste liquid treatment equipment. At the same time, the low-temperature coolant sprayed from the spray pipe 4 forms a continuous water curtain between the steel rail 8 under the restriction of the enclosing frame 5.

[0028] During the quenching heating process of the steel rail 8 by the quenching heater 3, the external protective gas delivery equipment continuously delivers protective gas into the quenching chamber 2. The protective gas can isolate the air from the quenching heating area of ​​the steel rail 8, preventing the quenching heating area of ​​the steel rail 8 from oxidation due to contact with the outside air. At the same time, under the obstruction and restriction of the coolant water curtains on both sides, only a small amount of protective gas in the quenching chamber 2 will escape outward along the gap between the enclosing frame 5 and the steel rail 8 with the coolant, greatly reducing the waste of protective gas escaping outward. The low-temperature coolant sprayed by the spray pipe 4 will continuously generate a large amount of high-temperature steam during the water-cooling treatment of the steel rail 8. Since a small amount of protective gas continuously escapes from the quenching chamber 2 along the gap between the enclosing frame 5 and the steel rail 8, the protective gas flow escaping outward from the quenching chamber 2 will blow most of the generated high-temperature steam away from the quenching chamber 2, preventing a large amount of high-temperature steam from drifting into the quenching chamber 2 and contacting the quenching heating area of ​​the steel rail 8.

[0029] During the quenching heating process of the steel rail 8 by the quenching heater 3, a small amount of high-temperature steam still floats into the quenching chamber 2. The external coolant delivery device continuously delivers coolant to the steam cooler 6 through the shunt pipe 65. At the same time, the steam cooler 6 continuously draws the protective gas and high-temperature steam in the quenching chamber 2 into the steam cooler 6. The steam cooler 6 cools the high-temperature steam back to liquid coolant. Then, the coolant flows downward from the steam cooler 6 to the drain hole 201 of the quenching chamber 2, and then flows into the outlet pipe 22 along the drain hole 201. In the embodiment, since the U-shaped pipe structure of the liquid outlet pipe 22 is filled with coolant serving as a water seal, when the coolant in the steam cooler 6 enters the U-shaped pipe structure of the liquid outlet pipe 22, based on the liquid level balance principle at both ends of the communicating vessel, the coolant newly entering the U-shaped pipe structure will squeeze the coolant originally in the U-shaped pipe structure outward into the waste liquid tank structure 101. Therefore, only the coolant can flow outward through the liquid outlet pipe 22 into the waste liquid tank structure 101, while the protective gas in the quenching chamber 2 cannot flow outward due to the interception of the coolant serving as a water seal in the liquid outlet pipe 22.

[0030] Example 2, based on Example 1, Figure 1-Figure 7As shown, the steam cooler 6 of this embodiment is composed of a cylinder shell 61, a suction fan 62 and a water-cooling column 63; the cylinder shell 61 is fixedly connected to the surrounding frame 5; the cylinder shell 61 is provided with a plurality of air inlet structures 601 on the side facing the corresponding surrounding frame 5; the suction fan 62 is installed at the bottom of the cylinder shell 61; a water-cooling column 63 with a hollow tube structure is fixedly connected to the cylinder shell 61; the shunt pipe 65 is connected to the water-cooling column 63; the external coolant delivery equipment continuously delivers coolant to the water-cooling column 63 through the shunt pipe 65, and the coolant keeps the outer surface of the water-cooling column 63 at a low temperature. At the same time, the suction fan 62 continuously draws the protective gas and high-temperature steam in the quenching chamber 2 into the cylinder shell 61 through the air inlet structure 601. When the high-temperature steam contacts the outer surface of the low-temperature water-cooling column 63, it will be cooled and restored to the liquid coolant. Then the low-temperature coolant flows downward out of the cylinder shell 61 along the outer surface of the water-cooling column 63. In this process, the coolant in the quenching chamber 2 The protective gas in the quenching chamber 2 is also at a high temperature due to the long-term influence of the thermal radiation heating of the quenching heater 3. When the high-temperature protective gas is drawn into the cylindrical shell 61 by the suction fan 62 and contacts the outer surface of the low-temperature water-cooling column 63, the water-cooling column 63 will absorb the heat in the protective gas, allowing the protective gas to flow downward out of the cylindrical shell 61 in a low-temperature state, ensuring that the protective gas in the quenching chamber 2 is continuously at a low temperature; each water-cooling column 63 is provided with a spiral guide bar 64 structure on the outer surface; the suction fan 62 draws high-temperature steam into the cylindrical shell 61 to contact the outer surface of the low-temperature water-cooling column 63, and the high-temperature steam will move along the spiral guide bar 64 structure on the water-cooling column 63 in a spiral downward motion trajectory, thereby lengthening the contact time between the high-temperature steam and the spiral guide bar 64 structure on the water-cooling column 63, thereby lengthening the cooling time of the high-temperature steam and improving the cooling efficiency of the high-temperature steam.

[0031] Example 3, based on Example 2, Figures 1-6As shown, the quenching chamber 2 of this embodiment is equipped with a thermometer 23 for monitoring the temperature of the quenching area of ​​the continuous steel rail 8; the bottom of the quenching chamber 2 is slidably connected to two movable plates 71; the two liquid outlet pipes 22 on the front side are jointly fixed to the movable plate 71 on the front side; the two liquid outlet pipes 22 on the rear side are jointly fixed to the movable plate 71 on the rear side; all liquid outlet pipes 22 are respectively plugged into corresponding drainage holes 201; two electric push rods 72 are installed at the bottom of the quenching chamber 2; the telescopic ends of the two electric push rods 72 are respectively fixed to the two movable plates 71; when the thermometer 23 detects that the temperature of the quenching area of ​​the steel rail 8 rises to more than the specified value, the quenching temperature is too high, which will lead to serious decarburization on the surface of the steel rail 8, resulting in quenching cracks or abnormal grain growth, The quality is reduced. At this time, the quenching heater 3 needs to reduce the quenching power of the steel rail 8. At the same time, the electric push rod 72 pushes the movable plate 71 in time to drive the liquid outlet pipe 22 downward to leave the drain hole 201. Then, the suction fan 62 in the steam cooler 6 continuously blows the protective gas in the quenching chamber 2 directly into the external environment through the drain hole 201. At the same time, the external protective gas conveying equipment continues to blow new protective gas into the quenching chamber 2 through the gas pipe 21. In the prior art, low-temperature nitrogen is usually used as protective gas, which is used to cool the area of ​​the steel rail 8 where the quenching temperature exceeds the specified value by continuously supplying low-temperature protective gas to the quenching chamber 2 until the temperature of the quenching area of ​​the steel rail 8 drops back to the normal value range.

[0032] The above embodiments are provided to persons familiar with the art for implementing or using the present invention. Personnel familiar with the art may make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the scope of protection of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A heat treatment device for machine tool guide rail steel parts, comprising: a conveyor machine (1); a quenching chamber (2) fixedly connected to the conveyor machine (1), and an outlet end structure and an inlet end structure are respectively provided on both sides of the quenching chamber (2); and a waste liquid tank structure (101) is provided on the conveyor machine (1); Its characteristics are: The invention also includes a quenching heater (3); a quenching heater (3) for quenching and heating the steel rail (8) is installed in the quenching chamber (2); a gas pipe (21) for conveying protective gas to the steel rail (8) is connected to the quenching chamber (2); a liquid spray pipe (4) is fixedly connected to the outlet end structure and the inlet end structure of the quenching chamber (2), and the liquid spray pipe (4) is connected to a plurality of liquid outlet nozzle structures (401) for spraying cooling liquid onto the surface of the steel rail (8); and a waste liquid tank structure (101) of the quenching chamber (2) is connected to a waste liquid pipe (11).

2. The heat treatment equipment for machine tool guide rail steel parts according to claim 1, characterized in that: A plurality of drainage holes (201) are provided at the bottom of the quenching chamber (2).

3. The heat treatment equipment for machine tool guide rail steel parts according to claim 2, characterized in that: A liquid outlet pipe (22) is connected to the liquid discharge hole (201).

4. The heat treatment equipment for machine tool guide rail steel parts according to claim 3, characterized in that: The liquid outlet pipe (22) is a communicating vessel with a water seal effect.

5. The heat treatment equipment for machine tool guide rail steel parts according to claim 1, characterized in that: The outlet end structure and the inlet end structure of the quenching chamber (2) are each fixedly connected to a surrounding frame (5) surrounding the outside of the steel track (8), and the liquid outlet nozzle structure (401) of the liquid spray pipe (4) is located inside the corresponding surrounding frame (5).

6. The heat treatment equipment for machine tool guide rail steel parts according to claim 5, characterized in that: The front side and the rear side of the enclosing frame (5) are each connected to a steam cooler (6); and a shunt pipe (65) for conveying cooling liquid to each steam cooler (6) is fixedly connected to the quenching chamber (2).

7. The heat treatment equipment for machine tool guide rail steel parts according to claim 6, characterized in that: The steam cooler (6) is composed of a cylindrical shell (61), a suction fan (62) and a water-cooling column (63); the cylindrical shell (61) is fixedly connected to the surrounding frame (5); a plurality of air inlet structures (601) are opened on the side of the cylindrical shell (61) facing the corresponding surrounding frame (5); the suction fan (62) is installed at the bottom of the cylindrical shell (61); a water-cooling column (63) with a hollow tube structure is fixedly connected to the cylindrical shell (61); and the diverter pipe (65) is connected to the water-cooling column (63).

8. The heat treatment equipment for machine tool guide rail steel parts according to claim 7, characterized in that: The outer surface of the water-cooling column (63) is provided with a spiral guide strip (64) structure.

9. The heat treatment equipment for machine tool guide rail steel parts according to any one of claims 1 to 8, characterized in that: A temperature measuring instrument (23) for monitoring the temperature of the quenching area of ​​the continuous steel rail (8) is installed on the quenching chamber (2).

10. The heat treatment equipment for machine tool guide rail steel parts according to claim 9, characterized in that: The bottom of the quenching chamber (2) is slidably connected to a movable plate (71); the liquid outlet pipe (22) is fixedly connected to the movable plate (71); the liquid outlet pipe (22) is plugged into the corresponding liquid discharge hole (201); an electric push rod (72) is installed at the bottom of the quenching chamber (2); the telescopic ends of the electric push rod (72) are respectively fixedly connected to the movable plate (71).

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