A numerical control integral medium-frequency induction quenching machine for automobile half shaft machining

Abstract

The application provides a numerical control integral medium-frequency induction quenching machine tool for automobile half shaft machining, which comprises a bed body, a medium-frequency power supply, a numerical control machine tool control panel and a cooling system, the medium-frequency power supply and the numerical control machine tool control panel are fixed to the outer wall of the bed body, the cooling system is fixed in the bed body, the medium-frequency power supply is electrically connected with a power supply control cabinet, the cooling system is connected with a circulating liquid pump in a quenching liquid pool through a pipeline, the power supply control cabinet and the circulating liquid pump are electrically connected with the numerical control machine tool control panel, a top pin, a base, an integral inductor and a water tank are fixed in the bed body, the top pin and the base are oppositely arranged, the integral inductor is fixed on a ball screw of the bed body and is electrically connected with the medium-frequency power supply, the integral inductor is arranged in a gap along the length direction of a workpiece, surrounds the whole hardening area and is similar to the shape of the workpiece, the water tank is arranged on the bed body outside the base, and the top pin is fixed with a top pin sleeve which is sleeved with a spline end surface of the workpiece. The integral inductor is used for realizing the integral heating of the product, the heating time is short, and the production efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of automobile half-axle processing and manufacturing, and in particular to a numerically controlled integral medium-frequency induction hardening machine tool for automobile half-axle processing. Background Art

[0002] During the production of automotive parts, axles require surface medium-frequency quenching. This is currently achieved using traditional scanning quenching machines. During operation, the workpiece remains stationary or rotates in a vertical position, while the inductor moves at various speeds along the length of the workpiece (in some devices, the inductor remains stationary while the workpiece moves), performing vertical scanning heating on the workpiece. The main advantage of vertical scanning is that the inductor is relatively easy to manufacture, as it is typically a circular single-turn coil. However, the inventors of this application have discovered through actual use that existing circular single-turn coil inductors have the following problems during vertical scanning heating: 1) The inductor moves a large distance relative to the workpiece during one rotation, leaving some areas of the workpiece unheated, which can easily lead to defects such as soft spots and soft bands on the workpiece; 2) During movement, the workpiece is displaced or the inductor deforms, making it easy for sparks to form at the transition radius between the journal and the disc of the axle workpiece; 3) The heating time is long, and there are many human factors, resulting in unstable product quality and low production efficiency. Summary of the Invention

[0003] Aiming at the technical problems that the existing circular ring single-turn coil inductor easily causes soft spots and soft bands in the workpiece during the vertical scanning heating process, the transition R fillet between the journal and the disk of the half-shaft workpiece is prone to sparking, the heating time is long, and the production efficiency is low, the present invention provides a CNC integrated medium-frequency induction quenching machine tool for automobile half-shaft processing.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A CNC integral medium frequency induction quenching machine for processing automobile half-axles comprises a bed, a medium frequency power supply, a CNC machine control panel and a cooling system, wherein the medium frequency power supply and the CNC machine control panel are fixedly connected to the outer wall of the bed, the cooling system is fixedly arranged inside the bed for quickly cooling the heated workpiece, the medium frequency power supply is electrically connected to the power supply control cabinet, the cooling system is connected to the circulating liquid pump in the quenching liquid pool through a pipeline, the power supply control cabinet and the circulating liquid pump are both electrically connected to the CNC machine control panel, a thimble, a base, an integral sensor and a water tank are also fixedly arranged inside the bed, the thimble and the base are relatively configured to position and clamp the workpiece, the integral sensor is fixedly arranged on the existing ball screw of the bed and electrically connected to the medium frequency power supply, the integral sensor is gap-arranged along the length direction of the workpiece to surround the entire hardening area and is similar to the shape of the workpiece, the water tank is arranged on the bed outside the base for soaking the outer disk of the quenched workpiece, and the thimble is fixedly connected to a thimble sleeve that is fitted with the spline end face of the workpiece.

[0006] Compared with the prior art, the automobile half shaft machining numerical control integral medium-frequency induction quenching machine tool provided by the application has the following beneficial effects: 1) the integral inductor is arranged in a gap along the length direction of the workpiece, surrounds the entire hardening area and is similar to the shape of the workpiece, so that the product can be heated as a whole, the heating time is short, the production efficiency is improved and the stability of the product quality is ensured; 2) the integral inductor can realize integral quenching, that is, the entire hardening area is heated and then quenched, and this hardening can be realized by using a multi-turn coil surrounding the entire hardening area; 3) the integral inductor can be driven to move up and down or adjust the gap with the workpiece by the existing numerical control machine tool control panel on the bed body, so that the workpiece can be effectively and uniformly heated as a whole, and the defects that the workpiece produces soft spots, soft belts and the shaft neck and disc transition R corner of the half shaft workpiece are easily ignited are avoided; 4) the workpiece disc part can be soaked in the water tank arranged on the outer bed body of the base, so that the disc part is prevented from being burned through; 5) the workpiece spline end face can be prevented from being heated by sleeving a special thimble on the spline end face, and the workpiece is rapidly cooled by the cooling system after being heated as a whole to the required temperature.

[0007] Further, the cooling system is a cooling water jet pipe.

[0008] Further, the thimble is made of brass which can isolate the magnetic field.

[0009] Further, the length of the thimble sleeved with the workpiece spline end face is 4.5-5.5 mm. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is the front view structural schematic diagram of the automobile half shaft machining numerical control integral medium-frequency induction quenching machine tool provided by the application.

[0011] Fig. 2 is the left view structural schematic diagram of the automobile half shaft machining numerical control integral medium-frequency induction quenching machine tool provided by the application.

[0012] Fig. 3 is the first side view structural schematic diagram of the automobile half shaft machining numerical control integral medium-frequency induction quenching machine tool provided by the application.

[0013] Fig. 4 is the second side view structural schematic diagram of the automobile half shaft machining numerical control integral medium-frequency induction quenching machine tool provided by the application.

[0014] In the figure, 1 is a bed body, 2 is a medium-frequency power supply, 3 is a numerical control machine tool control panel, 4 is a cooling system, 5 is a thimble, 6 is a base, 7 is an integral inductor, 8 is a water tank and 9 is a thimble. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific drawings.

[0016] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0017] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0018] Please refer to Figs. 1 to 4As shown, the present application provides a kind of automobile half shaft processing with numerical control integral medium frequency induction quenching machine tool, including bed 1, medium frequency power supply 2, numerical control machine tool control panel 3 and cooling system 4, the medium frequency power supply 2 and numerical control machine tool control panel 3 are fixedly connected with the outer wall of bed 1, the cooling system 4 is fixedly set in the inside of bed 1 for the quick cooling workpiece after heating, such as automobile half shaft, the medium frequency power supply 2 is electrically connected with power control cabinet, the cooling system 4 is connected with the circulating liquid pump in quenching liquid pool by pipeline, the power control cabinet and circulating liquid pump are electrically connected with numerical control machine tool control panel 3, the numerical control machine tool control panel 3 is used to control the start-stop of power control cabinet and circulating liquid pump and machine tool action, the power control cabinet is used to adjust the heating parameters such as voltage and current size of medium frequency power supply 2, the circulating liquid pump is used to send quenching liquid into cooling system 4 to cool workpiece and then backflow to quenching liquid pool for recycling, the specific structure and working principle of medium frequency power supply 2, power control cabinet, circulating liquid pump and numerical control machine tool control panel 3 are well known to those skilled in the art of prior art, thus not repeated here, the inside of bed 1 is also fixedly provided with thimble 5, base 6, integral inductor 7 and water tank 8, the thimble 5 and base 6 are oppositely arranged for positioning clamping workpiece, the integral inductor 7 is fixedly set on the existing ball screw of bed 1 and is electrically connected with medium frequency power supply 2, so that the integral inductor 7 can realize workpiece heating by the power supply provided by medium frequency power supply 2, the integral inductor 7 is gap configured to surround the entire hardening zone along the length direction of workpiece and is similar to the shape of workpiece, i.e. the integral inductor 7 is configured along the length direction of workpiece and maintains gap between workpiece, and compared with the existing circular ring single-turn coil inductor, the inductor provided by the application is long strip-shaped multi-turn coil integral inductor similar to the shape of workpiece (automobile half shaft), so that the integral heating of workpiece can be realized, the water tank 8 is arranged on the bed 1 outside base 6 for soaking the outer disc part of quenching workpiece, the thimble 5 is fixedly connected with thimble sleeve 9 sleeved with workpiece spline end surface.

[0019] Compared with the prior art, the automobile half shaft machining numerical control integral medium-frequency induction quenching machine tool has the following beneficial effects: 1) the integral inductor is arranged in the gap along the length direction of the workpiece, surrounds the entire hardening zone and is similar to the shape of the workpiece, so that the product can be heated as a whole, the heating time is short, the production efficiency is improved, and the stability of the product quality is ensured; 2) the integral inductor surrounds the entire hardening zone, so that the entire hardening zone can be quenched as a whole, that is, the entire hardening zone is heated and then quenched, and this hardening can be realized by using a multi-turn coil surrounding the entire hardening zone; 3) the integral inductor can be driven to move up and down or adjust the gap with the workpiece by the existing numerical control machine tool control panel on the bed, so that the workpiece can be effectively and uniformly heated as a whole, and the defects that the workpiece produces soft spots, soft belts and the shaft neck and disc transition R corner of the half shaft workpiece are easily ignited; 4) the water tank arranged on the outer bed can make the disc part of the quenched workpiece soaked in the water tank, so as to prevent the disc part from being burned through; 5) the special needle sleeve is sleeved on the spline end face of the workpiece, so that the spline end face can be prevented from being heated, and after the workpiece is heated to the required temperature, the workpiece is rapidly cooled by the cooling system.

[0020] As a specific embodiment, the cooling system 4 is a cooling water spray pipe, which can be realized by using the existing water spray pipe structure, so that the workpiece heated to the required temperature can be rapidly cooled by the cooling water spray pipe.

[0021] As a specific embodiment, the needle sleeve 9 is made of existing brass which can isolate the magnetic field, and the brass has strong wear resistance, so that the service life of the needle sleeve can be improved while preventing the spline end face from being heated.

[0022] As a specific embodiment, the length of the needle sleeve 9 sleeved with the spline end face of the workpiece is 4.5-5.5 mm, so that the spline end face can be better prevented from being heated, and the product quality is ensured.

[0023] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A numerical control integral medium-frequency induction quenching machine tool for automobile axle shaft machining, comprising a bed body (1), a medium-frequency power supply (2), a numerical control machine tool control panel (3) and a cooling system (4), the medium-frequency power supply (2) and the numerical control machine tool control panel (3) are fixedly connected with the outer wall of the bed body (1), the cooling system (4) is fixedly arranged in the bed body (1) for rapidly cooling the heated workpiece, the medium-frequency power supply (2) is electrically connected with a power supply control cabinet, the cooling system (4) is connected with a circulating liquid pump in a quenching liquid pool through a pipeline, the power supply control cabinet and the circulating liquid pump are electrically connected with the numerical control machine tool control panel (3), characterized in that, The bed body (1) is internally fixedly provided with a top pin (5), a base (6), an integral inductor (7) and a water tank (8), the top pin (5) and the base (6) are oppositely arranged for positioning and clamping a workpiece, the integral inductor (7) is fixedly arranged on an existing ball screw of the bed body (1) and is electrically connected with a medium-frequency power supply (2), the integral inductor (7) is gap-arranged along a length direction of the workpiece, surrounds an entire hardening zone and is similar to an outer shape of the workpiece, the water tank (8) is arranged on the bed body (1) outside the base (6) and is used for soaking an outer disc part of a quenched workpiece, the top pin (5) is fixedly connected with a top pin sleeve (9) sleeved with a spline end surface of the workpiece, and the top pin sleeve (9) is made of brass and can isolate a magnetic field.

2. The numerical control integrated medium-frequency induction quenching machine for automobile axle shaft machining according to claim 1, characterized in that, The cooling system (4) is a cooling water spraying pipe.

3. The numerical control integrated medium-frequency induction quenching machine for automobile axle shaft machining according to claim 1, characterized in that, The length that the top pin sleeve (9) is sleeved with the spline end surface of the workpiece is 4.5-5.5mm.

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