High-precision turning process for automobile forging parts based on error correction and device thereof

Abstract

The application relates to the technical field of automobile part machining, and discloses a high-precision automobile forging piece turning process based on error correction and a device thereof, which comprises a machine tool main body, a sliding tool holder is slidably arranged in the machine tool main body, a cutter body is press-fitted on the surface of the sliding tool holder, a forging piece is clamped in the machine tool main body, a tool bit is arranged at one end of the cutter body, and an auxiliary assembly capable of assisting in chip removal during turning of the forging piece by the tool bit is inlaid on the outer wall of the cutter body. The device is provided with a first closing nozzle, a second closing nozzle and a flow divider, the turning liquid accelerated by the nozzles and the flow divider impacts the surface of the workpiece to form a triangular liquid film, the liquid film forms an impact area near the tool bit due to the flow rate difference, the central axis of the nozzle is tangent to the outer wall of the curved surface of the workpiece at an acute angle, iron chips are wrapped and carried to the two sides, the splashing of the turning liquid is reduced, the iron chips are prevented from being rolled into the cutting area, the use cost of the turning liquid is saved, and the machining precision is ensured.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, and in particular to a high-precision turning process and apparatus for automotive forgings based on error correction. Background Technology

[0002] With the continuous improvement of people's living standards, the demand for automobiles continues to increase. Automobiles not only provide convenience for people's travel but also accelerate exchanges between different regions, drive the development of related industries, and promote the emergence of new industries and high technologies. This has led to an increasing demand for the processing of automotive parts. Some automotive parts require turning machining on lathes. Existing automotive parts turning devices typically first use a three-jaw chuck to fix the workpiece, then drive the workpiece to rotate, and subsequently bring the cutting tool tip close to the workpiece to achieve the turning machining of the workpiece surface. During the turning process, high temperatures and iron filings arise from metal detachment. During the plastic deformation and intense friction, when carbide cutting tools forcefully cut a workpiece, most of the mechanical energy is converted into heat energy, causing the temperature in the cutting zone to instantly reach hundreds of degrees. This not only causes rapid tool wear, such as softening and oxidation, but also leads to workpiece thermal deformation, surface burning, and precision deterioration, resulting in certain errors. To control such thermal damage, the most widely used technology in the industry is direct jet cooling with turning fluid. This involves spraying turning fluid directionally into the tool tip area through a nozzle, relying on the fluid to directly carry away the heat, while simultaneously lubricating the friction interface to suppress temperature rise, and using the flow of turning fluid to flush away chips, preventing chips from wrapping around the tool or scratching the workpiece surface.

[0003] However, existing turning equipment equipped with direct-jet turning fluid cooling technology still has certain shortcomings when turning workpieces. First, due to different processing requirements, the workpiece's rotation direction may change, such as clockwise or counterclockwise. At this time, the accumulation position of the high-temperature iron chips generated during turning will also change, possibly accumulating above or below the tool tip. In this case, the direct-jet turning fluid with a fixed direction and a relatively dispersed spray range continuously washes the tool tip, easily entraining the iron chips that should be discharged. This may cause the iron chips to flow disorderly on the tool tip and the machined area, or even roll back or press the iron chips into the forming cutting point and the already smooth workpiece surface. The secondary entrainment of iron chips will not only scratch the machined surface, forming scratches and pits, and destroying the surface integrity, but will also interfere with the normal cutting edge of the tool, causing chipping or abnormal wear, ultimately leading to workpiece scrap and shortened tool life. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing technology has the disadvantage that the direct flow of turning fluid into the cutting head can easily cause periodic vibration of slender cutting tools, thus affecting the turning accuracy. Also, the iron chips generated during turning may be impacted and flowed back to the turning point by the direct flow of turning fluid, which will damage the integrity and accuracy of the turning surface. To this end, we propose a high-precision turning process and device for automotive forgings based on error correction.

[0005] To achieve the above objectives, this application adopts the following technical solution: a high-precision automotive forging turning device based on error correction, comprising a machine tool body, a sliding tool post slidably installed inside the machine tool body, a tool body pressed against the surface of the sliding tool post, a forging workpiece clamped inside the machine tool body, a tool head installed at one end of the tool body, and an auxiliary component embedded in the outer wall of the tool body for assisting in chip removal during the turning of the forging workpiece by the tool head;

[0006] The auxiliary component includes a fluid supply chamber formed inside the cutter body. A first converging nozzle is embedded in the upper surface of the cutter body, and a second converging nozzle is embedded in the lower surface of the cutter body. Multiple flow dividers are symmetrically fixed from the center to both sides of the inner walls of the outlets of both the first and second converging nozzles. The flow dividers are used to divide and adjust the flow rate of the cutting fluid. Both the first and second converging nozzles are inclined, and are located above and below the cutter head, respectively. The diameter of the outlet of the two converging nozzles is smaller than the diameter of the inlet. The first and second converging nozzles are conical in shape, and the outlets of the first and second converging nozzles are tangent to the forging workpiece. The two adjacent sets of diverter plates together with the inner walls of the first and second converging nozzles form multiple sets of frustoconical water inlets that are narrow at one end and wide at the other. The inlets of the first and second converging nozzles are connected to the liquid supply chamber, and the side of the liquid supply chamber away from the auxiliary components is connected to an external turning fluid supply device through a liquid supply pipe.

[0007] Preferably, the size of the inner cavity of the multiple sets of frustum-shaped water outlets located on the inner wall of the first and second constricting nozzles decreases in a stepped manner from the middle to both sides.

[0008] Preferably, the cross-sectional shape of the inner cavity of each set of frustoconical water outlets is frustoconical.

[0009] Preferably, the liquid supply chamber is composed of a smooth cavity and two sets of flat cavities, and the inner wall of the liquid supply chamber is covered with a stainless steel layer.

[0010] Preferably, one end of the smooth cavity extends through the outer wall of the blade body, and the inner wall of the smooth cavity is provided with internal threads, and the flat cavity is connected to the other end of the smooth cavity.

[0011] Preferably, one end of each of the two sets of flat cavities is connected to the inlet of the first converging nozzle and the second converging nozzle, respectively, and the two sets of flat cavities and one set of rounded cavities are arranged in a Y-shape.

[0012] Preferably, the cutter head is mounted to one end of the cutter body by fasteners, and the inner wall of the liquid supply tube is covered with a corrosion-resistant coating.

[0013] Preferably, a cutting fluid supply device is installed on the outer wall of the machine tool body, and the cutting fluid supply device is connected to the control panel of the machine tool body through a wire.

[0014] Preferably, the output end of the turning fluid supply device is connected to a fluid supply pipe, and the other end of the fluid supply pipe is threadedly connected to the smooth cavity of the fluid supply chamber through an external threaded connector.

[0015] A high-precision turning process for automotive forgings based on error correction includes the following steps:

[0016] S1. Preparation of workpiece, cutting tools and auxiliary mechanisms:

[0017] First, connect the cutting fluid supply equipment to the supply chamber through the supply pipe. At this time, the external cutting fluid enters the supply chamber. Drive the three-jaw chuck to fix the forging workpiece. Then, install the cutting tool consisting of the tool body and the tool head on the sliding tool holder and tighten it.

[0018] S2, Start-up of turning fluid circulation:

[0019] Start the cutting fluid supply equipment. The fluid flows into the supply chamber through the supply pipe. After being accelerated in the chamber, it enters the first and second converging nozzles on the tool body. The nozzles are tapered and converging, which further accelerates the fluid by utilizing the narrow tube effect. The internal flow dividers ensure that the fluid flow maintains a stable velocity.

[0020] S3, Cutting and Cooling Chip Removal:

[0021] Start the machine tool body, the workpiece rotates with the three-jaw chuck, and the sliding tool post with the tool head approaches the workpiece for cutting; the cutting fluid sprayed from the two nozzles forms a triangular liquid film on the surface of the workpiece. The continuous flow of the triangular liquid film carries away the turning heat. The thin layer of cutting fluid film has limited contact with the tool head, reducing the impact on the tool head. When the upper and lower nozzles spray cutting fluid onto the forging workpiece at the same time, the opposing force of the upper and lower liquid films carries away the iron chips generated by turning towards both sides of the tool head.

[0022] S4. Finishing Process:

[0023] After cutting is completed, first turn off the cutting fluid equipment, then stop the machine tool, release the three-jaw chuck to remove the workpiece, and the process ends.

[0024] The technical effects and advantages of this invention are as follows:

[0025] In this invention, the device uses a liquid supply pipe, a liquid supply chamber for the cutting tool, and a first and second converging nozzle to work together. First, the liquid supply pipe introduces the cutting fluid into the liquid supply chamber. The Y-shaped structure of the liquid supply chamber, which transitions from a smooth cavity to a flat cavity, initially increases the speed. Then, the conical nozzle further increases the speed through the narrow tube effect, continuously providing high-speed cutting fluid to the nozzle. This achieves stable cooling of the cutting tool and the cutting point, effectively reducing vibration of slender cutting tools and improving the turning accuracy of forged workpieces.

[0026] In this invention, the device uses a first converging nozzle, a second converging nozzle, and a flow divider. The cutting fluid, accelerated by the nozzle and the flow divider, impacts the workpiece surface to form a triangular liquid film. Due to the difference in flow velocity, the liquid film impacts the workpiece near the cutting head, forming an impact zone. The central axis of the nozzle is tangent to the outer wall of the workpiece's curved surface at an acute angle. This achieves the goal of enveloping iron chips to both sides and reducing the splashing of cutting fluid, preventing iron chips from being rolled into the cutting zone, saving on the cost of using cutting fluid, and ensuring machining accuracy. Attached Figure Description

[0027] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0028] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0029] Figure 2 This is a detailed schematic diagram of the main structure of the present invention;

[0030] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0031] Figure 4 This is a side view schematic diagram of the forging workpiece, cutter head, cutter body and auxiliary components of the present invention;

[0032] Figure 5 This is a schematic diagram of the forging workpiece, cutter head, cutter body and auxiliary components of the present invention;

[0033] Figure 6 This is a plan view of the structure of the cutting head, cutting body and auxiliary components of the present invention;

[0034] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B;

[0035] Figure 8 This is a schematic diagram of the cutting head, cutting body, and auxiliary components of the present invention;

[0036] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point C;

[0037] Figure 10 This is a top view of the auxiliary component of the present invention;

[0038] Figure 11 This is a schematic diagram of the structure of the first and second nozzles of the present invention.

[0039] Legend: 1. Machine tool body; 11. Sliding tool post; 12. Forged workpiece; 13. Tool body; 14. Tool head; 15. Liquid supply pipe; 2. Auxiliary components; 21. First closing nozzle; 22. Second closing nozzle; 23. Flow divider; 24. Liquid supply chamber. Detailed Implementation

[0040] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0041] Reference Figure 1-11 As shown, the present invention provides a technical solution: a high-precision automotive forging turning device based on error correction, comprising a machine tool body 1 and a sliding tool holder 11 slidably installed inside the machine tool body 1, wherein the sliding tool holder 11 clamps and fixes the tool with fasteners, and a forging workpiece 12 is also clamped inside the machine tool body 1 by a three-jaw chuck. The tool mainly consists of two parts: a tool body 13 and a tool head 14. The tool body 13 is mainly made of high-strength and high-rigidity material, and is generally long or cylindrical. The surface is provided with a structure adapted to the installation of the tool head 14 and the clamping of the machine tool, serving as a support skeleton for the tool to transmit cutting force to the tool head 14 and ensure installation accuracy; while the tool head 14 is made of high-hardness and high-wear-resistance material. The material is mostly small block or sheet-like, and the shape of the cutting edge is designed according to the cutting requirements. It is the part that directly participates in the cutting. Its hardness and cutting edge precision determine the processing efficiency and quality. The cutting head 14 and the cutting body 13 are assembled by a detachable rigid connection. The cutting head 14 is fixed in the cutting groove at the top of the front end of the cutting body 13. The cutting edge extends out of the front end of the cutting body 13. The cutting body 13 provides stable support for the cutting head 14. The cutting head 14 achieves efficient cutting by relying on the rigidity of the cutting body 13. Together, they are adapted to the turning processing requirements of automotive parts. In this invention, the cutting body 13 is provided with an auxiliary component 2 for forming a liquid film on the cutting surface of the forging workpiece 12 and using the liquid film to cool the cutting head 14 and the surface of the forging workpiece 12 and remove iron filings.

[0042] Auxiliary component 2 includes a first converging nozzle 21 and a second converging nozzle 22 respectively embedded in the outer wall of the front and top ends of the cutter body 13. Both the first converging nozzle 21 and the second converging nozzle 22 are conical converging nozzles with narrow outlets and large inlets. This shape characteristic can increase the speed of the cutting fluid when it passes through at a certain flow rate (based on the principle of the septum effect, under the premise of stable flow of incompressible liquid and constant volumetric flow rate, the flow velocity will increase when the liquid flows through the narrow converging nozzle because the cross-sectional area decreases). Moreover, the first converging nozzle 21 and the second converging nozzle 22 each have multiple sets of flow dividers 23 fixed inside for diverting the cutting fluid (in a high flow rate state). The flow dividers 23 are symmetrically arranged, and two adjacent sets of flow dividers 23 form a conical space with a large inlet and a small outlet. The multiple sets of flow dividers 23 mainly perform three functions:

[0043] Firstly, the flow velocity in the cross-sectional cavity of the flat first converging nozzle 21 and the second converging nozzle 22 is kept within a certain range. Because the horizontal diameter of the outlet is relatively long and the flow velocity of the liquid is relatively low, intermittent flow interruption may occur, which will affect the heat dissipation effect and the chip removal effect of the forging workpiece 12 and the cutting head 14. The included angle between the two adjacent flow groups 23 near the nozzle outlet gradually increases from the middle to both sides. Through this design, the continuously flowing cutting fluid can present the effect of fast flow velocity in the middle and slow flow velocity on both sides.

[0044] Secondly, the cutting fluid sprayed from the first converging nozzle 21 and the second converging nozzle 22 continuously impacts the surface of the forging workpiece 12. Due to the different flow velocities at the middle and the two sides, the impact intensity is also different. Finally, a triangular "liquid film" is formed on the surface of the forging workpiece 12 (located above or below the cutting head 14, and the liquid flow is in contact with the curved surface of the forging workpiece 12). This triangular liquid film flows downward along the curved surface of the forging workpiece 12. During this process, the liquid film can perform preliminary cleaning on the surface of the forging workpiece 12. Then, as the liquid film continues to flow downward, it carries away the heat generated by turning as it passes the cutting head 14 and the turning point, achieving stable cooling of the cutting head 14 and the turning point. Because the liquid flow does not directly impact the cutting head 14, the vibration amplitude of the slender tool is small, which in turn improves the turning accuracy of the forging workpiece 12.

[0045] Third, the liquid flow ejected from the first converging nozzle 21 and the second converging nozzle 22 directly impacts the forging workpiece 12. Due to the difference in flow velocity, the liquid flow forms a triangular liquid film on the surface of the forging workpiece 12. The upper and lower liquid films collide with each other near the cutting head 14 and form an impact zone. This impact zone carries away the iron chips generated during the turning process of the cutting head 14 to both sides by the impacting fluid, keeping the iron chips away from the cutting head 14 and the turning point, thereby preventing the iron chips from being rolled into the cutting head 14 and the turning point, and further ensuring the accuracy of the turning precision.

[0046] Reference Figure 3-11 As shown in this embodiment: the central axes of the first converging nozzle 21 and the second converging nozzle 22 are both tangent to the curved outer wall of the forging workpiece 12, and the included angle is an acute angle. The special spray angle of the first converging nozzle 21 and the second converging nozzle 22 can reduce the impact of the sprayed liquid flow on the surface of the forging workpiece 12, thereby reducing the splashing of the turning fluid, reducing the amount of turning fluid used, saving the cost of use, and at the same time reducing the vibration caused by the impact to a certain extent, ensuring the stability of the liquid film while ensuring the machining accuracy.

[0047] The inlets of the first converging nozzle 21 and the second converging nozzle 22 are interconnected. The inside of the cutter body 13 is provided with a fluid supply chamber 24 for continuously supplying cutting fluid (in a high-speed flowing state) to the first converging nozzle 21 and the second converging nozzle 22. The fluid supply chamber 24 is also connected to the inlets of the first converging nozzle 21 and the second converging nozzle 22. The shape of the chamber connected to the fluid supply chamber 24 and the first converging nozzle 21 and the second converging nozzle 22 is approximately the shape of the English letter "Y". The fluid supply chamber 24 is divided into two parts: a smooth chamber and a flat chamber. The smooth chamber is located at the end of the cutter body 13, and the end away from the flat chamber extends to the surface of the cutter body 13 to form a circular interface. The circular interface has an internal thread, which can be used to connect and install with the external fluid supply pipe 15. The other end of the fluid supply pipe 15 is connected to the cutting fluid supply equipment.

[0048] As the cutting fluid flows from the smooth cavity into the flat cavity, its flow rate increases.

[0049] A high-precision turning process for automotive forgings based on error correction includes the following steps:

[0050] S1. Preparation of workpiece, cutting tools and auxiliary mechanisms:

[0051] First, the cutting fluid supply device is connected to the supply chamber 24 via the supply pipe 15. At this time, the external cutting fluid enters the supply chamber 24. The three-jaw chuck is driven to fix the forging workpiece 12. The cutting tool consisting of the tool body 13 and the tool head 14 is mounted on the sliding tool holder 11 and tightened.

[0052] S2, Start-up of turning fluid circulation:

[0053] When the cutting fluid supply equipment is started, the fluid flows into the supply chamber 24 through the supply pipe 15. After being accelerated in the chamber, it enters the first converging nozzle 21 and the second converging nozzle 22 on the tool body 13. The nozzles are conical and converging, which further accelerates the fluid by utilizing the narrow tube effect. The internal flow divider 23 ensures that the fluid flow maintains a stable flow rate.

[0054] S3, Cutting and Cooling Chip Removal:

[0055] Start the machine tool body 1. The workpiece rotates with the three-jaw chuck, driving the sliding tool post 11 to bring the tool head 14 close to the workpiece for cutting. The cutting fluid sprayed from the two nozzles forms a triangular liquid film on the surface of the workpiece. The continuously flowing triangular liquid film carries away the turning heat. The thin layer of cutting fluid film has limited contact with the tool head 14, reducing the impact on the tool head 14. When the upper and lower nozzles spray cutting fluid onto the forging workpiece 12 at the same time, the opposing force of the upper and lower liquid films carries away the iron chips generated by turning towards both sides of the tool head 14.

[0056] S4. Finishing Process:

[0057] After cutting is completed, first turn off the cutting fluid equipment, then stop the machine tool, release the three-jaw chuck to remove the workpiece, and the process ends.

[0058] Working principle: First, the external cutting fluid supply device is activated. The cutting fluid supply device connects to the cutting fluid supply chamber 24 via the supply pipe 15 and the circular interface (with internal threads) at the end of the smooth cavity in the cutting tool body 13. The supply chamber 24 is divided into a smooth cavity and a flat cavity. The smooth cavity is located at the end of the cutting tool body 13, and the end away from the flat cavity extends to the surface of the cutting tool body 13 to form the aforementioned circular interface. One end of the supply pipe 15 is connected to the external cutting fluid supply device, and the other end is fixed to the supply chamber 24 via the internal threads of the circular interface. When the cutting fluid is supplied from the external... After the fluid flows into the smooth cavity of the supply chamber 24, it will flow into the flat cavity. During the process of the cutting fluid flowing from the smooth cavity into the flat cavity, due to the special structure of the supply chamber 24 "transition from smooth cavity to flat cavity" (the shape of the chamber connected to the supply chamber 24 and the first converging nozzle 21 and the second converging nozzle 22 is approximately the English letter "Y"), the flow rate of the cutting fluid is increased. Finally, it enters the inlet of the first converging nozzle 21 and the second converging nozzle 22 connected to the flat cavity at the same time in a high-speed flow state, continuously supplying high-speed cutting fluid to the two nozzles.

[0059] Secondly, the first converging nozzle 21 and the second converging nozzle 22 are respectively embedded in the outer wall of the front end and top end of the cutter body 13, and both are conical converging nozzles with narrow outlets and wide inlets. Based on the principle of the narrow tube effect (under the premise of stable flow of incompressible liquid and constant volumetric flow rate, when the liquid flows through the narrow converging part, the flow velocity will increase due to the decrease in cross-sectional area), when the high-speed cutting fluid flows in from the nozzle inlet and passes through the conical converging flow channel, the flow velocity is further increased. At the same time, the first converging nozzle 21 and the second converging nozzle 22 are each fixed with multiple sets of flow dividers 23 for diverting the high-speed cutting fluid. The flow dividers 23 are symmetrically arranged. The two adjacent flow vanes 23 form a conical space with a large inlet and a small outlet. Since the outlet diameter of the first converging nozzle 21 and the second converging nozzle 22 is relatively long, if the flow velocity is low, intermittent flow interruption may occur, which will affect the heat dissipation effect and the chip removal effect of the forging workpiece 12 and the cutting head 14. The included angle between the two adjacent flow vanes 23 near the nozzle outlet increases in a stepwise manner from the middle to both sides. Through this design, the continuously flowing cutting fluid can present the effect of fast flow velocity in the middle and slow flow velocity on both sides, so that the flow velocity in the cross-sectional cavity of the flat first converging nozzle 21 and the second converging nozzle 22 is kept within a certain range.

[0060] Secondly, the cutting fluid, accelerated and diverted by the first converging nozzle 21 and the second converging nozzle 22, continuously impacts the surface of the forging workpiece 12 clamped by the three-jaw chuck inside the machine tool body 1. Because the flow velocity of the cutting fluid differs between the middle and sides, the impact intensity also differs. Ultimately, a triangular "liquid film" forms on the surface of the forging workpiece 12 (located above or below the cutting head 14, and the fluid flow conforms to the curved surface of the forging workpiece 12). This triangular liquid film flows downwards along the curved surface of the forging workpiece 12. During this process, the liquid film first performs initial... The first step is to clean and remove impurities attached to the surface. Then the liquid film continues to flow downward. When it passes the cutter head 14 (the cutter head 14 is fixed in the tool groove at the top of the front end of the cutter body 13, and the cutting edge extends out of the front end of the cutter body 13) and the turning point (the position where the cutter head 14 contacts the forging workpiece 12 for turning), it will carry away the heat generated by turning together, so as to achieve stable cooling of the cutter head 14 and the turning point. Since the liquid flow does not directly impact the cutter head 14, the vibration amplitude of the tool (slender tool) that is clamped and fixed on the sliding tool holder 11 by fasteners is small, which in turn improves the turning accuracy of the forging workpiece 12.

[0061] Finally, after the liquid streams ejected from the first converging nozzle 21 and the second converging nozzle 22 directly impact the forging workpiece 12, due to the difference in flow velocity (faster in the middle and slower on both sides), a triangular liquid film is formed on the surface of the forging workpiece 12. This liquid film impacts each other near the cutting head 14, forming an impact zone. This impact zone pushes the iron chips generated during the turning process of the cutting head 14 to both sides, causing the iron chips to be carried away by the impacting fluid, thus keeping the iron chips away from the cutting head 14 and the turning point, thereby preventing the iron chips from rolling. The position of the cutter head 14 relative to the turning point further ensures the precision of the turning finish. At the same time, the central axes of the first converging nozzle 21 and the second converging nozzle 22 are both tangent to the curved outer wall of the forging workpiece 12, and the included angle is an acute angle. This special spray angle can reduce the impact of the sprayed liquid flow on the surface of the forging workpiece 12, thereby reducing the splashing of turning fluid, reducing the amount of turning fluid used, saving usage costs, and at the same time reducing the vibration caused by impact to a certain extent, ensuring the stability of the liquid film, and further ensuring the machining accuracy.

[0062] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A high-precision turning device for automobile forging parts based on error correction, characterized in that, Including machine tool main body (1), the inside sliding installation of machine tool main body (1) has sliding tool rest (11), the surface pressure installation of sliding tool rest (11) has tool body (13), the inside clamping of machine tool main body (1) has forging workpiece (12), the one end installation of tool body (13) has tool bit (14), the inwall embedding installation of tool body (13) has the auxiliary assembly (2) that can be to tool bit (14) turning forging workpiece (12) process is assisted with clear chip; The auxiliary assembly (2) includes a liquid supply cavity (24) opened in the tool body (13), a first converging nozzle (21) is embedded on the upper surface of the tool body (13), a second converging nozzle (22) is embedded on the lower surface of the tool body (13), the inner wall of the water outlet of the first converging nozzle (21) and the second converging nozzle (22) is symmetrically fixed with a plurality of shunt pieces (23) from the middle to the two sides, the shunt pieces (23) are used for shunting and adjusting the flow rate of the turning fluid, the first converging nozzle (21) and the second converging nozzle (22) are inclined as a whole, and the first converging nozzle (21) and the second converging nozzle (22) are located above and below the tool bit (14) respectively, the diameter of the water outlet of the first converging nozzle (21) and the second converging nozzle (22) is smaller than the diameter of the water inlet, the first converging nozzle (21) and the second converging nozzle (22) are conical as a whole, and the water outlet of the first converging nozzle (21) and the second converging nozzle (22) is tangent to the forging workpiece (12), adjacent two groups of the shunt pieces (23) and the inner wall of the first converging nozzle (21) and the second converging nozzle (22) form a plurality of frustum-shaped water distribution outlets, the water inlets of the first converging nozzle (21) and the second converging nozzle (22) are communicated with the liquid supply cavity (24), and the side of the liquid supply cavity (24) away from the auxiliary assembly (2) is connected with an external turning fluid supply device through a liquid supply pipe (15); The inner cavity space size of the plurality of frustum-shaped water distribution outlets located in the inner wall of the water outlet of the first converging nozzle (21) and the second converging nozzle (22) decreases from the middle to the two sides, the liquid supply cavity (24) is composed of a smooth cavity and two flat cavities, and the inner wall of the liquid supply cavity (24) is wrapped with a stainless steel layer.

2. The high-precision turning device for automobile forging parts based on error correction according to claim 1, characterized in that: The cross-sectional shape of the inner cavity space of each group of frustum-shaped water distribution outlets is frustum-shaped.

3. The high-precision turning device for automobile forging parts based on error correction according to claim 1, characterized in that: One end of the smooth cavity penetrates through the outer wall of the tool body (13), and the inner wall of the smooth cavity is provided with internal threads, and the other end of the flat cavity is communicated with the smooth cavity.

4. The high-precision turning device for automobile forging parts based on error correction according to claim 1, characterized in that: One end of the two flat cavities is respectively communicated with the water inlets of the first converging nozzle (21) and the second converging nozzle (22), and the two flat cavities and one smooth cavity are arranged in the shape of letter Y as a whole.

5. The high-precision turning device for automobile forging parts based on error correction according to claim 1, characterized in that: The tool bit (14) is installed on one end of the tool body (13) through a fastener, and the inner wall of the liquid supply pipe (15) is covered with a corrosion-resistant coating.

6. The high-precision turning device for automobile forging parts based on error correction according to claim 1, characterized in that: The turning fluid supply device is installed on the outer wall of the machine tool main body (1), and the turning fluid supply device is communicated with the control panel of the machine tool main body (1) through wires.

7. The high-precision turning device for automobile forging parts based on error correction according to claim 1, characterized in that: The output end of the turning fluid supply device is connected with a liquid supply pipe (15), the other end of the liquid supply pipe (15) is connected with the smooth cavity of the liquid supply cavity (24) through the external thread butt joint.

8. A high-precision turning process for automobile forgings based on error correction, applied to the high-precision turning device for automobile forgings based on error correction according to any one of claims 1-7, characterized in that: The method comprises the following steps: S1, workpiece, tool and auxiliary mechanism preparation: First, the turning fluid supply device is installed through the liquid supply pipe (15) and the liquid supply cavity (24), at this time the external turning fluid enters the liquid supply cavity (24); the three-jaw chuck is driven to fix the forged workpiece (12), the tool composed of the tool body (13) and the tool head (14) is installed on the sliding tool holder (11) and fastened; S2, turning fluid circulation start: Start the turning fluid supply device, the liquid flows into the liquid supply cavity (24) through the liquid supply pipe (15), and after speed increasing in the cavity, enters the first converging nozzle (21) and the second converging nozzle (22) on the tool body (13); the nozzle is in the shape of a sharp taper, further speed increasing is realized by using the narrow tube effect, and the internal flow sheet (23) ensures that the liquid flow maintains a stable flow rate; S3, cutting and cooling and chip removal: Start the machine tool main body (1), the workpiece rotates with the three-jaw chuck, the sliding tool holder (11) is driven to bring the tool head (14) close to the workpiece for cutting; the turning fluid sprayed by the two nozzles forms a triangular liquid film on the surface of the workpiece, the cutting heat is continuously taken away by the triangular liquid film, the thin turning fluid film is in limited contact with the tool head (14), the impact on the tool head (14) is weakened, when the turning fluid is sprayed by the upper and lower nozzles to the forged workpiece (12) at the same time, the iron chips generated by turning are taken away to the two sides of the tool head (14) by means of the collision of the upper and lower liquid films; S4, processing ending: After cutting is completed, the turning fluid device is first turned off, then the machine tool is stopped, the three-jaw chuck is loosened, the workpiece is taken down, and the process is ended.

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