Turn-milling combined machining device and method for automobile fluid control valve

Abstract

The invention discloses a turning and milling combined machining device and method for an automobile fluid control valve, and belongs to the technical field of machining. The turning and milling combined machining device for the automobile fluid control valve comprises a machine body, a saddle, a transverse slide carriage, a longitudinal slide carriage, a chuck, an X-direction feeding unit and a Y-direction feeding unit; the device further comprises a connecting plate, an outer circle turning unit, a fluid hole drilling unit, a valve element hole drilling unit, a valve element hole hinging unit, a fixing base, a lifting arm, a fixing arm and a supporting unit. And the lifting unit is used for driving the two lifting arms to move relatively. According to the device, the lifting unit drives the two lifting arms to move close to each other, so that the supporting unit clamps the periphery of a workpiece, and then the workpiece has transverse and longitudinal supporting and clamping acting force, so that the supporting and clamping acting force can generate counter-acting force on feeding force when the outer circle is turned and a valve element hole is drilled and the workpiece is subjected to the large feeding force; therefore, the stress concentration phenomenon and the extension deformation of the workpiece can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining, and particularly relates to a turning-milling compound machining device and a machining method for an automotive fluid control valve. Background Art

[0002] When machining the solenoid valve of an automotive air conditioner compressor, it is necessary to successively perform operations such as turning the outer diameter of a bar workpiece (usually made of brass), drilling a valve core hole, drilling a fluid hole, and centerless grinding. In the prior art, turning the outer diameter, drilling the valve core hole, and drilling the fluid hole are usually performed using a turning-milling compound machine tool. Since the raw material of the solenoid valve is usually made of brass, its ductility is relatively large. During machining, when the feeding force is too large, the raw material may be deformed by extension, or stress concentration may occur at the connection with the chuck of the machine tool, ultimately resulting in poor cylindricity or eccentricity of the machined workpiece. In addition, when drilling the fluid hole, since the valve core hole has already been machined on the workpiece at this time, its wall thickness is relatively thin. When the drill bit feeds during drilling of the workpiece, the radial force on the workpiece is relatively large, and the wall thickness of the workpiece is relatively thin, which may further exacerbate the stress concentration phenomenon at the connection position between the workpiece and the chuck. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a turning-milling compound machining device and a machining method for an automotive fluid control valve.

[0004] The technical solution adopted to solve the above technical problem is: a turning-milling compound machining device for an automotive fluid control valve, including a machine body, a saddle, a cross slide, a longitudinal slide, a chuck, an X-axis feeding unit, and a Y-axis feeding unit, and further including:

[0005] A connecting plate fixedly connected to the outer wall of one side of the longitudinal slide, a turning outer diameter unit and a drilling fluid hole unit are correspondingly installed on the top surface of the longitudinal slide, and a drilling valve core hole unit and a reaming valve core hole unit are correspondingly installed on the top surface of the connecting plate;

[0006] A fixed seat fixedly connected to the inner side wall of the machine body, two lifting arms are vertically slidably connected to the end surface of the fixed seat from top to bottom, the two lifting arms are respectively located on both radial sides of the chuck, and a fixed arm extending radially inward toward the chuck is fixedly connected to the end of the lifting arm far from the fixed seat;

[0007] A supporting unit fixedly connected to one end of the fixed arm facing the radially inner side of the chuck;

[0008] A lifting unit provided on the machine body, and the lifting unit is used to drive the two lifting arms to move relative to each other.

[0009] Through the above technical solution, the lifting unit drives the two lifting arms to move closer to each other, so that the supporting unit clamps the periphery of the workpiece, and further enables the workpiece to have transverse and longitudinal supporting and clamping forces. When turning the outer circle of the workpiece and drilling the valve core hole, after the workpiece receives a large feeding force, the supporting and clamping forces can generate a reaction force against the feeding force, thereby reducing the stress concentration phenomenon along the connection with the chuck and reducing the extension deformation of the workpiece.

[0010] Furthermore, the lifting unit includes a rotating seat rotatably sleeved on the periphery of the fixed seat. The end of the lifting arm is fixedly connected with a small-diameter shaft, and the end of the small-diameter shaft is coaxially fixedly connected with a large-diameter shaft. A straight groove for the large-diameter shaft to engage is formed on the end face of the fixed seat, and the large-diameter shaft freely slides up and down in the straight groove. An inclined groove for the small-diameter shaft to insert is formed on the end face of the rotating seat, and the small-diameter shaft freely slides in the inclined groove. The length direction of the inclined groove forms an angle with the length direction of the straight groove. A rotating drive assembly for driving the rotating seat to rotate around the axis of the chuck is provided on the inner side wall of the machine body.

[0011] Through the above technical solution, the rotating drive assembly drives the rotating seat to rotate, so that the periphery of the small-diameter shaft slides relative to the inner wall of the inclined groove. When sliding relatively, the large-diameter shaft will slide in the straight groove, so that the two lifting arms can be driven to move relative to each other, and further the two supporting units can be driven to move closer to each other and clamp the workpiece.

[0012] Furthermore, a fixed pin is vertically fixedly connected to the inner wall of the straight groove, and a pin hole for the fixed pin to insert is formed on the periphery of the large-diameter shaft. The fixed pin freely slides in the pin hole.

[0013] Through the above technical solution, the fixed pin slides in the pin hole, so that the large-diameter shaft slides in the straight groove, and further the large-diameter shaft will not break away from the fixed seat.

[0014] Furthermore, the rotating drive assembly includes a movable hinge seat rotatably connected to the inner side wall of the machine body. A driving cylinder is installed on the outer wall of the movable hinge seat. The end of the cylinder rod of the driving cylinder is fixedly connected with a connecting head, and the connecting head is hinged to the end face of the rotating seat through a pivot shaft.

[0015] Through the above technical solution, the cylinder rod of the driving cylinder expands and contracts, and further drives the connecting head to drive the rotating seat to rotate around the axis of the chuck, which is convenient to operate.

[0016] Furthermore, the supporting unit includes a connecting portion provided at the end of the fixed arm. An arched frame is fixedly connected to one end of the connecting portion away from the fixed arm. A supporting pressure roller is horizontally rotatably connected to each of the two sides of the arched frame corresponding to the radial direction of the chuck. A workpiece clamping space is formed between the supporting pressure rollers on the two arched frames, and the workpiece clamping space is coaxial with the chuck.

[0017] Through the above technical solution, the periphery of the supporting pressure roller on the arch frame abuts against the surface of the workpiece, thereby generating a clamping force on the workpiece. In this way, when the workpiece is under a feeding force during the machining process, the lateral component of the clamping force of the supporting pressure roller on the workpiece can offset a certain feeding force. Therefore, the workpiece is not likely to generate extension deformation and stress concentration phenomenon along the connection with the chuck.

[0018] Furthermore, one end of the fixed arm facing the radially inner side of the chuck is horizontally fixedly connected with an arc-shaped plate. A rotating plate is slidably sleeved on the arc-shaped plate. An arc-shaped sliding cavity for the arc-shaped plate to be engaged is provided in the rotating plate. The arc-shaped plate freely rotates in the arc-shaped sliding cavity with the axis of the chuck as the rotation fulcrum. A supporting adjustment component for driving the rotation of the rotating plate is provided on the outer wall of the fixed arm.

[0019] Through the above technical solution, the rotating plate is driven to rotate by the supporting adjustment component. When the rotating plate rotates, it can drive the arch frame to rotate slightly around the axis of the workpiece, thereby adjusting the magnitude and direction of the lateral component of the clamping force of the supporting pressure roller on the workpiece. Furthermore, when turning the outer circle and drilling fluid holes, different-direction supporting forces can be generated on the workpiece.

[0020] Furthermore, a short pin is horizontally fixedly connected to the outer wall of the arc-shaped plate away from the fixed arm. An anti-detachment gasket is sleeved on the end of the short pin exposed from the rotating plate. The end face of the anti-detachment gasket is in contact connection with the side wall of the rotating plate.

[0021] Through the above technical solution, the end face of the anti-detachment gasket abuts against the side wall of the rotating plate, thereby being able to prevent the rotating plate from detaching from the arc-shaped plate.

[0022] Furthermore, the supporting adjustment component includes an arc-shaped rack fixedly connected to the outer arc surface of the rotating plate. A fixed shaft is horizontally fixedly connected to the outer wall of the fixed arm. A transmission gear is rotatably sleeved on the periphery of the fixed shaft. The arc-shaped rack is engaged with the transmission gear. A cylinder support plate is connected to the top surface of the lifting arm. An adjustment cylinder is vertically installed on the top of the cylinder support plate. A rack portion is fixedly connected to the end of the cylinder rod of the adjustment cylinder. The rack portion is engaged with the transmission gear.

[0023] Through the above technical solution, the cylinder rod of the adjustment cylinder extends and retracts to drive the vertical movement of the rack portion. Then, through the engagement of the rack portion with the transmission gear and the engagement of the transmission gear with the arc-shaped rack, the rotating plate can be driven to rotate around the axis of the chuck, thereby adjusting the direction and magnitude of the supporting force of the supporting pressure roller on the workpiece, and the operation is convenient.

[0024] Furthermore, a circlip is installed at the end of the fixed shaft passing through the transmission gear. The surface of the circlip is in contact connection with the end face of the transmission gear.

[0025] Through the above technical solution, the snap ring limits the transmission gear, so that the transmission gear will not fall off the fixed shaft.

[0026] A turning-milling composite machining method for an automotive fluid control valve, which is applied to the turning-milling composite machining device for an automotive fluid control valve as described above, includes:

[0027] Clamping: Clamp the workpiece on the chuck and lock it. The lifting unit drives the supporting unit to move towards the chuck, so that the supporting unit clamps the periphery of the workpiece.

[0028] Turning the outer circle: The X-axis feed unit drives the cross slide to move towards the chuck, making the outer circle turning unit approach the workpiece. The chuck rotates and drives the workpiece to rotate. Then, the Y-axis feed unit drives the outer circle turning unit to turn the outer circle of the workpiece.

[0029] Drilling the valve core hole: After turning the outer circle, the lifting unit drives the supporting unit to continue moving towards the chuck, so that the supporting unit clamps the periphery of the workpiece after turning the outer circle. Then, the Y-axis feed unit and the X-axis feed unit act and drive the outer circle turning unit to reset. Then, the X-axis feed unit drives the cross slide to move towards the workpiece, so that the valve core hole drilling unit drills the valve core hole of the workpiece.

[0030] Drilling the fluid hole: After drilling the valve core hole, the Y-axis feed unit and the X-axis feed unit act and drive the valve core hole drilling unit to reset. Then, the Y-axis feed unit and the X-axis feed unit act and drive the fluid hole drilling unit to feed, and then drill the fluid hole on the periphery of the workpiece.

[0031] Reaming: After drilling the fluid hole, the Y-axis feed unit and the X-axis feed unit act and drive the fluid hole drilling unit to reset. Then, the Y-axis feed unit and the X-axis feed unit act and drive the valve core hole reaming unit to approach the workpiece and ream the valve core hole on the workpiece.

[0032] Unloading: After reaming, the Y-axis feed unit and the X-axis feed unit act and drive the valve core hole reaming unit to reset. Then, the lifting unit drives the supporting unit to reset, so that the supporting unit disengages from the clamping state of the workpiece. Then, loosen the chuck and remove the machined workpiece.

[0033] Through the above technical solution, the supporting unit generates a clamping force on the workpiece, and the lateral component force of the clamping force can offset a part of the feeding force during turning the outer circle and drilling the fluid hole, thereby reducing the phenomenon of workpiece extension and deformation, and at the same time avoiding the stress concentration phenomenon at the connection between the workpiece and the chuck.

[0034] The beneficial effects of the present invention are as follows:

[0035] (1) In the present invention, the lifting unit drives the two lifting arms to move closer to each other, so that the supporting unit clamps the periphery of the workpiece. As a result, the workpiece has transverse and longitudinal supporting and clamping forces. When turning the outer circle of the workpiece and drilling the valve core hole, after the workpiece receives a large feeding force, the supporting and clamping forces can generate a reaction force against the feeding force, thereby reducing the stress concentration phenomenon at the connection of the workpiece with the chuck and reducing the extension deformation of the workpiece.

[0036] (2) In the present invention, the supporting adjustment assembly drives the rotating plate to rotate. When the rotating plate rotates, it can drive the arched frame to rotate slightly around the axis of the workpiece, thereby adjusting the magnitude and direction of the transverse component of the clamping force of the supporting pressure roller on the workpiece. Furthermore, when turning the outer circle of the workpiece and drilling the fluid hole, different-direction supporting forces can be generated on the workpiece.

[0037] (3) In the present invention, the cylinder rod of the adjustment cylinder extends and retracts to drive the rack part to move vertically. Then, through the meshing of the rack part with the transmission gear and the meshing of the transmission gear with the arc rack, the rotating plate can be driven to rotate around the axis of the chuck, thereby adjusting the direction and magnitude of the supporting force of the supporting pressure roller on the workpiece, and the operation is convenient. Description of the Drawings

[0038] Figure 1 is the overall structural schematic diagram of a turning-milling composite machining device for an automotive fluid control valve in the present invention;

[0039] Figure 2 is Figure 1 the structural schematic diagram from another perspective in;

[0040] Figure 3 is Figure 1 the positional relationship schematic diagram after omitting some structures in;

[0041] Figure 4 is Figure 3 the structural schematic diagram from another perspective in;

[0042] Figure 5 is Figure 4 the enlarged schematic diagram of the partial structure at A in;

[0043] Figure 6 is the positional relationship schematic diagram after the fixed seat, rotating seat and lifting arm are assembled in the present invention;

[0044] Figure 7 is Figure 6 the exploded decomposition schematic diagram of the structure in;

[0045] Figure 8 is Figure 6 the positional relationship schematic diagram after some structures are cut open in;

[0046] Figure 9 is Figure 6 a structural schematic diagram from another perspective in

[0047] Figure 10 is Figure 9 an enlarged schematic diagram of the local structure at position B in

[0048] Reference numerals: 1, machine body; 2, saddle; 3, chuck; 4, rotating seat; 5, driving cylinder; 6, movable hinge seat; 7, X-axis feeding unit; 8, cross slide; 9, connecting head; 10, external turning unit; 11, longitudinal slide; 12, Y-axis feeding unit; 13, drill valve core hole unit; 14, ream valve core hole unit; 15, connecting plate; 16, drill fluid hole unit; 17, adjusting cylinder; 18, workpiece; 19, arched frame; 20, arc plate; 21, rotating plate; 22, arc rack; 23, transmission gear; 24, lifting arm; 25, rack portion; 26, fixed arm; 27, connecting portion; 28, supporting roller; 29, inclined groove; 30, arc sliding cavity; 31, fixed seat; 32, straight groove; 33, fixed pin; 34, large-diameter shaft; 35, small-diameter shaft. Detailed implementation manners

[0049] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] As Figures 1-10 shown, this embodiment provides a turning-milling composite machining device for an automotive fluid control valve, including a machine body 1, a saddle 2, a cross slide 8, a longitudinal slide 11, a chuck 3, an X-axis feeding unit 7 and a Y-axis feeding unit 12. The saddle 2 is installed in the machine body 1. The X-axis feeding unit 7 and the Y-axis feeding unit 12 are both of the structure of a motor and a ball screw pair. The cross slide 8 is slidably connected to the saddle 2 and is driven by the X-axis feeding unit 7 to move along the X-axis direction (refer to Figure 3 , the X direction is the left-right movement direction, and the Y direction is the front-back movement direction). The longitudinal slide 11 is slidably connected to the cross slide 8 and is driven by the Y-axis feeding unit 12 to move along the Y-axis direction. The chuck 3 is installed in the machine body 1. One side outer wall of the longitudinal slide 11 is welded or connected by screws with a connecting plate 15. An external turning unit 10 and a drill fluid hole unit 16 are correspondingly installed on the top surface of the longitudinal slide 11. A drill valve core hole unit 13 and a ream valve core hole unit 14 are correspondingly installed on the top surface of the connecting plate 15;

[0051] The external turning unit 10 consists of a tool holder and a turning tool. The tool holder is connected to the top surface of the longitudinal slide 11 by screws. The drilling fluid hole unit 16 consists of a first drill holder, a first drill mounting shank, a first drill, and a first drill driving motor. The first drill holder is mounted on one end of the longitudinal slide 11 away from the external turning unit 10 by screws. The first drill mounting shank is mounted on the first drill holder. The first drill is mounted on the first drill mounting shank, and the first drill mounting shank is driven to rotate by the first drill driving motor mounted on the first drill holder so that the first drill can rotate. The core hole drilling unit 13 consists of a second drill holder, a second drill mounting shank, a second drill, and a second drill driving motor. The second drill holder is mounted on one end of the connecting plate 15 away from the chuck 3 by screws. The second drill mounting shank is mounted on the second drill holder. The second drill is mounted on the second drill mounting shank, and the second drill mounting shank is driven to rotate by the second drill driving motor mounted on the second drill holder so that the second drill can rotate. The core hole reaming unit 14 consists of a reaming tool holder, a reamer mounting shank, a reamer, and a reamer driving motor. The reaming tool holder is connected to the connecting plate 15 by screws. The reamer mounting shank is mounted on the reaming tool holder. The reamer is mounted on the reamer mounting shank, and the reamer driving motor is mounted on the reaming tool holder and drives the reamer mounting shank to rotate;

[0052] A fixed seat 31 is connected to the inner side wall of the machine body 1 by screws. A first through hole for the free passage of the chuck 3 is provided on the end face of the fixed seat 31. A rotating seat 4 is rotatably sleeved on the periphery of the fixed seat 31. Specifically, a receiving cavity for the free passage of the fixed seat 31 is provided on the end face of the rotating seat 4. The fixed seat 31 is engaged in the receiving cavity, so that the rotating seat 4 can freely rotate on the periphery of the fixed seat 31. In addition, a second through hole for the free passage of the chuck 3 is provided on the end face of the rotating seat 4. Two lifting arms 24 are slidably connected to the end face of the fixed seat 31. Specifically, a large-diameter shaft 34 and a small-diameter shaft 35 are successively fixed to the end of the lifting arm 24 facing the fixed seat 31 in a direction away from the fixed seat 31. The large-diameter shaft 34 and the small-diameter shaft 35 are coaxially connected. A straight groove 32 for the engagement of the large-diameter shaft 34 is provided on the end face of the fixed seat 31. The large-diameter shaft 34 can freely slide up and down in the straight groove 32. In addition, the end face of the large-diameter shaft 34 is flush with the end face of the fixed seat 31, so as not to interfere with the inner wall of the receiving cavity on the rotating seat 4. An inclined groove 29 for the free passage of the small-diameter shaft 35 is provided on the end face of the rotating seat 4. The length direction of the inclined groove 29 forms an angle with the length direction of the straight groove 32, and the small-diameter shaft 35 can freely slide in the inclined groove 29. The end face of the small-diameter shaft 35 corresponding to the lifting arm 24 is flush with the end face of the rotating seat 4, and the surface of the lifting arm 24 abuts against the end face of the rotating seat 4. In this way, the rotating seat 4 is limited by the surface of the lifting arm 24 and the end face of the fixed seat 31, so as not to break away from the fixed seat 31. In addition, combined with Figures 6-9As shown, when the rotating seat 4 rotates on the periphery of the fixed seat 31, it will cause the small-diameter shaft 35 to slide relative to the inner wall of the inclined groove 29 in the inclined groove 29. Furthermore, the small-diameter shaft 35 drives the large-diameter shaft 34 to move correspondingly up and down in the straight groove 32, so as to realize that when the rotating seat 4 rotates, the lifting arm 24 is driven to move vertically. In addition, a fixing pin 33 is vertically fixed on the inner wall of the straight groove 32, and a pin hole for the fixing pin 33 to be inserted is provided on the periphery of the large-diameter shaft 34. The fixing pin 33 slides freely in the pin hole. By the sliding of the fixing pin 33 in the pin hole, the large-diameter shaft 34 can be limited, preventing the large-diameter shaft 34 from disengaging from the straight groove 32;

[0053] The inner side wall of the machine body 1 is connected with a fixing plate by screws. The surface of the fixing plate is horizontally welded with a supporting shaft. An active hinge seat 6 is rotatably sleeved on the supporting shaft, so that the active hinge seat 6 is rotatably connected to the inner side wall of the machine body 1. A driving cylinder 5 is installed on the outer wall of the active hinge seat 6 by screws. The end of the cylinder rod of the driving cylinder 5 is fixedly connected with a connecting head 9. The connecting head 9 is hinged to the end face of the rotating seat 4 through a pivot. In this way, by the telescopic movement of the cylinder rod of the driving cylinder 5, the connecting head 9 can drive the pivot and the rotating seat 4 to rotate around the axis of the chuck 3;

[0054] The two lifting arms 24 are respectively located on both sides of the radial direction of the chuck 3, and the end of the lifting arm 24 away from the fixed seat 31 is fixedly connected to a fixed arm 26 extending radially inwardly of the chuck 3. The fixed arm 26 and the lifting arm 24 are vertically connected. The end of the fixed arm 26 away from the lifting arm 24 (or the end facing radially inwardly of the chuck 3) is horizontally fixedly connected to the arc plate 20. The arc plate 20 is slidably fitted with a rotating plate 21. The rotating plate 21 is provided with an arc-shaped sliding cavity 30 for the arc plate 20 to engage. The arc plate 20 is The arc-shaped sliding cavity 30 is free to rotate with the axis of the chuck 3 as the rotating fulcrum. The outer wall of the arc plate 20 on the side away from the fixed arm 26 is horizontally fixed with a short pin. The end of the short pin exposed to the rotating plate 21 is sleeved with an anti-slip gasket. The end face of the anti-slip gasket is in contact with the side wall of the rotating plate 21. The inner arc surface of the rotating plate 21 (the side facing the radial inner side of the chuck 3) is vertically fixed with a connecting portion 27. The end of the connecting portion 27 away from the rotating plate 21 is fixed with an arch frame 19. The arc center of the arch frame 19 is coaxial with the chuck 3. In addition, the arch frame 19 is opposite to the rotating plate 21. The radially opposite sides of the chuck 3 are horizontally connected to support rollers 28, and a workpiece clamping space is formed between the support rollers 28 on the two arch frames 19. The workpiece clamping space is coaxial with the chuck 3. The outer arc surface of the rotating plate 21 is fixedly connected to an arc rack 22. The outer wall of the fixed arm 26 is horizontally fixed to a fixed shaft. The periphery of the fixed shaft is rotatably covered with a transmission gear 23. The arc rack 22 is engaged with the transmission gear 23. The top surface of the lifting arm 24 is connected to a cylinder support plate. The top of the cylinder support plate is vertically installed with a regulating air Cylinder 17, the end of the cylinder rod of the regulating cylinder 17 is fixedly connected with a rack portion 25, the rack portion 25 is engaged with the transmission gear 23, the rack portion 25 includes a cylindrical section and an L-shaped plate, the cylindrical section is provided with a blind hole for installing the cylinder rod of the regulating cylinder 17, the horizontal end of the L-shaped plate is welded to the end of the cylindrical section, and the vertical end of the L-shaped plate is provided with a plurality of tooth block structures, the tooth block structure is engaged with the transmission gear 23, in addition, a retaining spring is installed at one end of the fixed shaft passing through the transmission gear 23, and the surface of the retaining spring is in contact with the end face of the transmission gear 23.

[0055] The working principle of this embodiment is as follows:

[0056] Clamping: Insert the (brass material) workpiece 18 into the chuck 3 and lock the chuck 3 so that the chuck 3 clamps the workpiece 18. Then start the driving cylinder 5. The cylinder rod of the driving cylinder 5 extends to a certain extent (note that it is not extended to the full extent). When the cylinder rod of the driving cylinder 5 extends, it will drive the connector 9 to move toward the lower side of the chuck 3 and drive the rotating seat 4 to rotate counterclockwise (reference Figure 3 or Figure 4) When the rotating seat 4 rotates, the small-diameter shaft 35 will slide relative to the inner wall of the inclined groove 29 within the inclined groove 29. As a result, the small-diameter shaft 35 drives the lifting arm 24 to move towards the radially inner side of the chuck 3, causing the periphery of the supporting roller 28 to contact the periphery of the workpiece 18 (at this time, the outer diameter of the workpiece 18 is relatively large because the outer circle has not been machined). A certain squeezing force is generated on the workpiece 18, and the squeezing force has longitudinal and transverse component forces on the workpiece 18. The transverse component force serves as a reaction force to counteract the feeding force;

[0057] Turning the outer circle: After clamping in place, refer to Figure 10 , the cylinder rod of the adjusting cylinder 17 on the upper side extends, and the cylinder rod of the other adjusting cylinder 17 shortens. As a result, the two transmission gears 23 are respectively engaged with the two rack portions 25, and then the transmission gears 23 are engaged with the two arc-shaped racks 22, thereby driving the two rotating plates 21 to deflect away from the outer circle turning unit 10. In this way, the lateral component force of the clamping force of the left supporting roller 28 on the workpiece 18 is relatively large, and the direction of the lateral component force can be towards the outer circle turning unit 10. Then, through the rotation of the chuck 3, the workpiece 18 is driven to rotate. Then, the X-axis feeding unit 7 drives the cross-slide 8 to move towards the chuck 3, bringing the outer circle turning unit 10 closer to the workpiece 18. Then, the Y-axis feeding unit 12 drives the outer circle turning unit 10 to turn the outer circle of the workpiece 18. During the outer circle turning process, the outer circle turning unit 10 starts turning the outer circle from the end of the workpiece 18 away from the chuck 3. Therefore, the diameter of the surface of the workpiece 18 near the chuck 3 remains unchanged. As a result, the supporting roller 28 continuously generates a clamping force on the workpiece 18. And because during the outer circle turning stage, the overall mechanical strength of the workpiece 18 is relatively large, even if the supporting roller 28 cannot generate a clamping force on the part where the outer circle has been turned, the feeding force during the cutting of the outer circle turning unit 10 will not cause the workpiece 18 to undergo plastic deformation. Since the side of the workpiece 18 near the chuck 3 is in the final stage of outer circle turning, the supporting roller 28 generates a clamping force on this side, which can prevent the workpiece 18 from experiencing stress concentration at the connection with the chuck 3. Additionally, because during the outer circle turning stage, the supporting roller 28 deflects towards the side away from the outer circle turning unit 10, the lateral component force of the supporting and clamping force of the left supporting roller 28 on the workpiece 18 can offset part of the feeding force. Moreover, when the chuck 3 rotates and drives the workpiece 18 to rotate, the supporting roller 28 contacts the workpiece 18, causing the supporting roller 28 to rotate synchronously, so that the supporting roller 28 does not interfere with the rotation of the workpiece 18;

[0058] Drilling the valve core hole: After the outer circle turning is completed, the chuck 3 stops rotating, and the X-axis feed unit 7 and the Y-axis feed unit 12 drive the longitudinal carriage 11 and the cross carriage 8 to return to their original positions, thereby causing the outer circle turning unit 10 to return to its original position. At this time, since the diameter of the workpiece 18 decreases after the outer circle turning, the driving cylinder 5 needs to be started again. The cylinder rod of the driving cylinder 5 continues to extend, causing the two lifting arms 24 to continue to approach each other relatively, so that the supporting roller 28 clamps the surface of the workpiece 18 after the outer circle turning. Then, the cylinder rod of the adjusting cylinder 17 returns to its initial state, that is, the state where the supporting clamping forces generated by the two supporting rollers 28 on the arch frame 19 on the workpiece 18 are of the same magnitude, or in other words, the two supporting rollers 28 on the arch frame 19 are symmetric along the length direction of the fixed arm 26. Then, the X-axis feed unit 7 drives the cross carriage 8 to move towards the chuck 3, and at the same time, the valve core hole drilling unit 13 rotates, thereby axially drilling the workpiece 18 to complete the drilling of the valve core hole of the workpiece 18;

[0059] Drilling the fluid hole: After the valve core hole drilling is completed, the X-axis feed unit 7 and the Y-axis feed unit 12 drive the longitudinal carriage 11 and the cross carriage 8 to return to their original positions, thereby causing the valve core hole drilling unit 13 to return to its original position. Then, the adjusting cylinder 17 is started, and the cylinder rods of the two adjusting cylinders 17 act in the opposite direction, that is, during the outer circle turning stage, the adjusting cylinder 17 whose cylinder rod originally extended acts, causing the cylinder rod to shorten, and the adjusting cylinder 17 whose cylinder rod originally shortened acts, causing the cylinder rod to extend, thereby causing the two arch frames 19 to deflect in the opposite direction, so that the lateral component of the supporting clamping force of the supporting roller 28 on the workpiece 18 faces the fluid hole drilling unit 16. The X-axis feed unit 7 and the Y-axis feed unit 12 drive the longitudinal carriage 11 and the cross carriage 8 to act, so that the fluid hole drilling unit 16 drills the fluid hole on the periphery of the workpiece 18. When drilling the fluid hole, since the lateral component of the supporting clamping force generated by the supporting roller 28 on the right side on the workpiece 18 is the largest, it can offset part of the feeding force of the fluid hole drilling unit 16 on the workpiece 18 during the fluid hole drilling, reducing the extension deformation of the workpiece 18 and the stress concentration phenomenon along the connection with the chuck 3;

[0060] Reaming the hole: After the fluid hole drilling is completed, there may be burrs on the inner wall of the fluid hole corresponding to the valve core hole, so reaming is required. Specifically, first, the cylinder rod of the adjusting cylinder 17 returns to its initial state, that is, the state where the supporting clamping forces generated by the two supporting rollers 28 on the arch frame 19 on the workpiece 18 are of the same magnitude, or in other words, the two supporting rollers 28 on the arch frame 19 are symmetric along the length direction of the fixed arm 26. The X-axis feed unit 7 and the Y-axis feed unit 12 drive the longitudinal carriage 11 and the cross carriage 8 to return to their original positions, thereby causing the fluid hole drilling unit 16 to return to its original position. Then, the X-axis feed unit 7 and the Y-axis feed unit 12 drive the longitudinal carriage 11 and the cross carriage 8 to act, and at the same time, the valve core hole reaming unit 14 rotates, causing the valve core hole reaming unit 14 to start the reaming operation on the valve core hole;

[0061] Unloading: After the reaming is completed, the X-axis feed unit 7 and the Y-axis feed unit 12 drive the longitudinal carriage 11 and the cross carriage 8 to move, so that the reaming valve core hole unit 14 is reset. Then, the cylinder rod of the driving cylinder 5 is shortened, and further the rotating seat 4 rotates in the reverse direction, so that the lifting arm 24 moves away from the chuck 3, and further the supporting pressure roller 28 is disengaged from the clamping state of the workpiece 18. Then, the worker loosens the chuck 3 and takes out the processed workpiece 18 to complete the unloading.

[0062] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A combined turning and milling processing device for an automotive fluid control valve, comprising a machine body (1), a saddle (2), a cross slide (8), a longitudinal slide (11), a chuck (3), an X-axis feed unit (7) and a Y-axis feed unit (12), characterized in that, Further included are: A connecting plate (15) fixedly connected to an outer wall on one side of the longitudinal carriage (11). An external turning unit (10) and a fluid hole drilling unit (16) are correspondingly installed on the top surface of the longitudinal carriage (11). A valve core hole drilling unit (13) and a valve core hole reaming unit (14) are correspondingly installed on the top surface of the connecting plate (15); A fixed seat (31) fixedly connected to an inner wall of the machine body (1). Two lifting arms (24) are vertically and slidably connected to an end surface of the fixed seat (31) from top to bottom. The two lifting arms (24) are respectively located on two radial sides of the chuck (3). One end of the lifting arm (24) far from the fixed seat (31) is fixedly connected with a fixed arm (26) extending towards the radial inner side of the chuck (3); A support unit fixedly connected to one end of the fixed arm (26) towards the radial inner side of the chuck (3); A lifting unit provided on the machine body (1). The lifting unit is used to drive the two lifting arms (24) to move relative to each other.

2. The turning-milling composite machining device for an automotive fluid control valve according to claim 1, wherein The lifting unit includes a rotating seat (4) rotatably sleeved on the periphery of the fixed seat (31). A small-diameter shaft (35) is fixedly connected to an end of the lifting arm (24). A large-diameter shaft (34) is coaxially fixedly connected to an end of the small-diameter shaft (35). A straight groove (32) for engaging the large-diameter shaft (34) is formed in the end surface of the fixed seat (31). The large-diameter shaft (34) freely slides up and down in the straight groove (32). An inclined groove (29) for inserting the small-diameter shaft (35) is formed in the end surface of the rotating seat (4). The small-diameter shaft (35) freely slides in the inclined groove (29). The length direction of the inclined groove (29) forms an angle with the length direction of the straight groove (32). A rotating drive assembly for driving the rotating seat (4) to rotate around the axis of the chuck (3) is provided on the inner wall of the machine body (1).

3. The turning-milling composite machining device for an automotive fluid control valve according to claim 2, characterized in that, A fixing pin (33) is vertically fixedly connected to an inner wall of the straight groove (32). A pin hole for inserting the fixing pin (33) is formed on the periphery of the large-diameter shaft (34). The fixing pin (33) freely slides in the pin hole.

4. The turning-milling composite machining device for an automotive fluid control valve according to claim 2, wherein, The rotating drive assembly includes a movable hinge seat (6) rotatably connected to the inner wall of the machine body (1). A driving cylinder (5) is installed on an outer wall of the movable hinge seat (6). A connecting head (9) is fixedly connected to an end of a cylinder rod of the driving cylinder (5). The connecting head (9) is hinged to an end surface of the rotating seat (4) through a pivot shaft.

5. The combined turning and milling machining device for an automotive fluid control valve according to claim 1, characterized in that, The support unit includes a connecting portion (27) provided at an end of the fixed arm (26). An arch frame (19) is fixedly connected to an end of the connecting portion (27) far from the fixed arm (26). A supporting pressure roller (28) is horizontally rotatably connected to each of two radial sides of the arch frame (19) corresponding to the chuck (3). A workpiece clamping space is formed between the supporting pressure rollers (28) on the two arch frames (19). The workpiece clamping space is coaxial with the chuck (3).

6. The automotive fluid control valve turning-milling compound machining device according to claim 5, wherein, One end of the fixed arm (26) facing the radially inner side of the chuck (3) is horizontally fixed with an arc-shaped plate (20). A rotating plate (21) is slidably sleeved on the arc-shaped plate (20). An arc-shaped sliding cavity (30) for engaging with the arc-shaped plate (20) is formed in the rotating plate (21). The arc-shaped plate (20) freely rotates in the arc-shaped sliding cavity (30) with the axis of the chuck (3) as the rotation fulcrum. A support adjusting assembly is provided on the outer wall of the fixed arm (26) for driving the rotation of the rotating plate (21).

7. The turning-milling compound machining device for an automotive fluid control valve according to claim 6, characterized in that, A short pin is horizontally fixed on the outer wall of the arc-shaped plate (20) away from the fixed arm (26). An anti-drop gasket is sleeved on one end of the short pin protruding from the rotating plate (21). The end face of the anti-drop gasket is in contact connection with the side wall of the rotating plate (21).

8. The turning-milling compound machining device for an automotive fluid control valve according to claim 6, characterized in that, The support adjusting assembly includes an arc-shaped rack (22) fixed on the outer arc surface of the rotating plate (21). A fixed shaft is horizontally fixed on the outer wall of the fixed arm (26). A transmission gear (23) is rotatably sleeved on the periphery of the fixed shaft. The arc-shaped rack (22) meshes with the transmission gear (23). A cylinder support plate is connected to the top surface of the lifting arm (24). An adjusting cylinder (17) is vertically installed on the top of the cylinder support plate. A rack portion (25) is fixed to the end of the cylinder rod of the adjusting cylinder (17). The rack portion (25) meshes with the transmission gear (23).

9. The turning-milling compound machining device for an automotive fluid control valve according to claim 8, characterized in that, A snap ring is installed at one end of the fixed shaft passing through the transmission gear (23). The surface of the snap ring is in contact connection with the end face of the transmission gear (23).

10. A turning-milling composite machining method for an automotive fluid control valve, applied to the turning-milling composite machining device for the automotive fluid control valve described in claim 1, characterized in that, Comprising: Clamping: Clamp the workpiece (18) on the chuck (3) and lock it. The support unit is driven by the lifting unit to move towards the chuck (3), so that the support unit clamps the periphery of the workpiece (18). Turning the outer circle: The cross slide (8) is driven by the X-axis feed unit (7) to move towards the chuck (3), so that the outer circle turning unit (10) approaches the workpiece (18). The chuck (3) rotates and drives the workpiece to rotate. Then, the outer circle turning unit (10) is driven by the Y-axis feed unit (12) to turn the outer circle of the workpiece (18). Drilling the valve core hole: After the outer circle turning is completed, the support unit is driven by the lifting unit to continue moving towards the chuck (3), so that the support unit clamps the periphery of the workpiece (18) after the outer circle turning. Then, the Y-axis feed unit (12) and the X-axis feed unit (7) act and drive the outer circle turning unit (10) to reset. Then, the cross slide (8) is driven by the X-axis feed unit (7) to move towards the workpiece (18), so that the valve core hole drilling unit (13) drills the valve core hole of the workpiece (18). Drilling the fluid hole: After the valve core hole drilling is completed, the Y-axis feed unit (12) and the X-axis feed unit (7) act and drive the valve core hole drilling unit (13) to reset. Then, the Y-axis feed unit (12) and the X-axis feed unit (7) act and drive the fluid hole drilling unit (16) to feed, and then drill the fluid hole in the periphery of the workpiece (18). Reaming: After drilling the fluid hole, the Y-axis feed unit (12) and the X-axis feed unit (7) operate to drive the drill fluid hole unit (16) to reset. Then, the Y-axis feed unit (12) and the X-axis feed unit (7) operate to drive the reaming valve core hole unit (14) close to the workpiece (18) and ream the valve core hole on the workpiece (18). Unloading: After reaming, the Y-axis feed unit (12) and the X-axis feed unit (7) operate to drive the reaming valve core hole unit (14) to reset. Then, the lifting unit drives the support unit to reset, so that the support unit disengages from the clamping state of the workpiece (18). Then, the chuck (3) is loosened, and the processed workpiece (18) is removed.

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