Grouped processing tool for deep cavity processing of die-forged aluminum alloy

Abstract

The application discloses a group machining tool for die forging aluminum alloy deep cavity machining and belongs to the technical field of aviation part machining. The group machining tool for die forging aluminum alloy deep cavity machining comprises a chuck, which is used for clamping a deep cavity part to be machined, and further comprises a sliding ring, which can rotate around the central axis of the chuck and is provided with a first sliding hole in the vertical direction at the bottom end; a connecting rod, which is in sliding connection with the first sliding hole at the bottom end; a connecting sleeve, which is pivotally connected with the tool bit of a vertical milling cutter, and the tool bit of the vertical milling cutter can drive the connecting sleeve to move in the vertical direction; a supporting block, which is on the same horizontal line with the tool tip of the vertical milling cutter and is used for applying a supporting force to the side wall of the part towards the tool tip of the vertical milling cutter; and a damping mechanism, which is used for inhibiting the vibration of the supporting block. The group machining tool for die forging aluminum alloy deep cavity machining can support and buffer the cutting part of the side wall of the part during the deep cavity machining of the deep cavity part, so as to inhibit the vibration of the side wall of the part.

Description

Technical Field

[0001] This invention relates to the field of aerospace component processing technology, specifically to a group machining tooling for deep cavity machining of die-forged aluminum alloys. Background Technology

[0002] Thin-walled deep-cavity structural parts are commonly used components in aerospace equipment, such as structural parts inside aero-engine compressors. These parts are often manufactured by die forging aluminum alloy followed by deep-cavity machining to meet design precision requirements. Deep-cavity machining of these parts requires the use of machining fixtures for positioning and clamping. In existing technology, a three-jaw or four-jaw chuck is commonly used to clamp the part radially, and then an end mill is used to cut the internal cavity.

[0003] When machining these deep-cavity parts, simply using a chuck to clamp them is insufficient because the sidewalls of these parts are relatively thin. To prevent the chuck from deforming the parts, the clamping force applied to the sidewalls by the chuck is usually not large. This results in the end mill tip applying a cutting force to the inner wall of the part when cutting it, causing the sidewalls of the part to vibrate. The vibrating sidewalls of the part will affect the machining accuracy of the deep cavity and reduce the yield rate of the parts. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems in the prior art and provide a group machining fixture for deep cavity machining of die-forged aluminum alloys, which can suppress the vibration of the sidewall of the part and ensure the machining accuracy of the part when performing deep cavity machining.

[0005] This invention provides a group machining fixture for deep cavity machining of die-forged aluminum alloys, including a chuck for clamping deep cavity parts to be machined, and further comprising:

[0006] A slip ring is pivotally connected to the outer wall of the chuck and can rotate around the central axis of the chuck. The bottom end of the slip ring is provided with a first vertical sliding hole.

[0007] A connecting rod is vertically arranged, and the bottom end of the connecting rod is slidably connected to the first sliding hole;

[0008] A connecting sleeve is attached to the top of the connecting rod. The connecting sleeve is pivotally connected to the head of the end mill, and the head of the end mill can drive the connecting sleeve to move in the vertical direction.

[0009] A support block abuts against the outer wall of the part. The support block is on the same horizontal line as the tip of the end mill. The support block is used to apply a supporting force toward the tip of the end mill to the side wall of the part.

[0010] A vibration damping mechanism is mounted on the connecting rod and connected to the support block to suppress the vibration of the support block.

[0011] Preferably, a connecting shaft is connected to the slip ring, the axis of the connecting shaft is collinear with the axis of the part, a connecting plate is also provided between the connecting rod and the connecting sleeve, one end of the connecting plate is connected to the connecting rod, and the other end of the connecting plate is provided with a second sliding hole, the connecting plate is slidably connected to the connecting shaft through the second sliding hole, the connecting plate is provided with a sliding groove along the radial direction of the part, and the side wall of the connecting sleeve is provided with a first slider, the first slider is slidably connected in the sliding groove.

[0012] Preferably, the connecting rod is provided with a pressure strip, one end of which abuts against the top of the side wall of the part. The pressure strip is used to apply a vertically downward pressing force to the side wall of the part. The other end of the pressure strip is provided with a limiting sliding hole. The outer wall of the connecting rod matches the limiting sliding hole. The pressure strip is slidably connected to the outer wall of the connecting rod through the limiting sliding hole. The limiting sliding hole is used to restrict the rotation of the pressure strip relative to the connecting rod. The connecting rod is provided with a first spring, which abuts against the top of the pressure strip. The first spring is used to apply a vertically downward elastic force to the pressure strip.

[0013] Preferably, the connecting rod is provided with an external thread, and an adjusting nut is connected to the external thread. The top end of the first spring abuts against the adjusting nut, and the bottom end of the first spring abuts against the pressure bar. The adjusting nut is used to adjust the preload of the first spring.

[0014] Preferably, a roller is pivotally connected to one end of the pressure bar away from the limiting sliding hole. The axial direction of the roller is along the radial direction of the part. The outer wall of the roller is pressed against the top of the side wall of the part. The roller is used to apply a vertically downward pressing force to the side wall of the part.

[0015] Preferably, the vibration damping mechanism includes a cylinder liner, a piston, and a second spring. The cylinder liner is horizontally arranged and fixedly connected to a connecting rod. The piston is slidably connected inside the cylinder liner. The support block is fixedly connected to the piston. The second spring is located inside the cylinder liner and abuts against the piston. The second spring is used to apply an elastic force to the piston. The side wall of the cylinder liner is provided with a vent hole, which communicates with the inner cavity of the cylinder liner.

[0016] Preferably, a pressure sensor is provided inside the cylinder liner cavity, and the second spring abuts against the pressure sensor. The pressure sensor is used to detect the real-time elastic force of the second spring. The vent hole is connected to a speed control valve, and the speed control valve is electrically connected to a controller. The controller is electrically connected to the pressure sensor. The controller controls the speed control valve to operate according to the peak value of the real-time elastic force of the second spring. The higher the peak value of the real-time elastic force of the second spring, the smaller the opening of the speed control valve.

[0017] Preferably, the top end of the connecting rod is provided with an adjustment mechanism, which is used to adjust the distance between the connecting rod and the chuck axis.

[0018] Preferably, the adjusting mechanism includes a pressure block and a rack. The connecting plate is provided with a through groove along the radial direction of the part. The pressure block is fixed to the top of the connecting rod. The rack is provided on the connecting plate. The length direction of the rack is parallel to the length direction of the through groove. The pressure block is provided with toothed blocks. The top of the connecting rod passes through the through groove and is connected to a nut sleeve. The nut sleeve is used to drive the pressure block to apply a pressing force to the rack so that the toothed blocks on the pressure block engage with the rack.

[0019] Preferably, the slip ring is provided with a plurality of first sliding holes, which are arranged along the length direction of the through groove.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the group machining tooling for deep cavity machining of die-forged aluminum alloys of the present invention can support and buffer the cutting part of the side wall during deep cavity machining of deep cavity parts, so as to suppress the vibration of the side wall of the part and ensure the machining accuracy of the part.

[0021] By setting up a connecting shaft and a connecting plate, the top of the connecting rod is connected through the connecting plate and the connecting shaft, which increases the rigidity of the connecting rod. This prevents insufficient rigidity of the connecting rod from affecting the vibration damping mechanism's vibration suppression effect. Furthermore, when the end mill is machining cylindrical parts with different inner diameters, it ensures the accurate relative position of the end mill tip and the support block, so that the supporting force applied by the support block to the side wall of the part is always directed towards the end mill tip, thus ensuring the entire machining fixture's suppression of vibration on the side wall of the part. By setting up a pressure strip, which abuts against the top of the side wall of the part, a vertical compressive force is applied to the side wall, effectively preventing vertical vibration of the side wall during cutting. Combined with the support block suppressing horizontal vibration of the side wall, this maximizes the suppression of side wall vibration, thereby ensuring the machining accuracy of the part. By rotating the adjusting nut, the compression of the first spring is adjusted, thereby regulating the clamping force applied by the pressure bar to the side wall of the part. This prevents excessive clamping force from causing deformation due to the thin wall thickness of the part, and also prevents insufficient clamping force from making it difficult to press the side wall of the part onto the chuck. By using rollers, the pressure bar is pressed against the upper edge of the side wall of the part. As the pressure bar rotates around the central axis of the chuck, which is also the central axis of the part, the friction between the pressure bar and the side wall of the part is reduced, thus preventing the pressure bar from scratching the upper edge of the side wall. The second spring inside the cylinder liner abuts against the piston. This second spring alleviates piston vibration, thereby reducing piston vibration and, consequently, reducing the vibration between the support block and the side wall of the part. The vent hole applies a certain resistance to the airflow, thus consuming the kinetic energy of the airflow, which in turn consumes the kinetic energy of the piston vibration, and further consumes the kinetic energy of the side wall vibration, further reducing the vibration of the side wall of the part. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the AA surface of the present invention;

[0024] Figure 3 This is a schematic diagram of the BB surface of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the C-plane of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the pressure strip of the present invention.

[0027] Figure 6 This is a schematic diagram of the vibration reduction mechanism of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Components, 101. Chuck, 102. Vibration damping mechanism, 103. Slip ring, 104. First sliding hole, 105. Connecting rod, 106. Connecting sleeve, 107. Cutting head, 108. Support block, 109. Cutting tip, 201. Connecting shaft, 202. Connecting plate, 203. Slide groove, 204. First slider, 301. Pressure bar, 302. Limiting sliding hole, 303. First spring, 4. Adjusting nut, 5. Roller, 601. Cylinder liner, 602. Piston, 603. Second spring, 604. Vent hole, 701. Pressure sensor, 702. Speed ​​control valve, 8. Adjusting mechanism, 901. Pressure block, 902. Rack, 903. Through groove, 904. Tooth block, 905. Nut sleeve. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 1-6 The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] like Figures 1-6As shown, the present invention provides a group machining fixture for deep cavity machining of die-forged aluminum alloy, including a chuck 101 for clamping the deep cavity part 1 to be machined, and further including: a slip ring 103, a connecting rod 105, a connecting sleeve 106, a support block 108, and a vibration damping mechanism 102. The slip ring 103 is pivotally connected to the outer wall of the chuck 101 and can rotate around the central axis of the chuck 101. The bottom end of the slip ring 103 is provided with a first vertical sliding hole 104. The connecting rod 105 is vertically arranged, and the bottom end of the connecting rod 105 is slidably connected to the first sliding hole 104. A sleeve 106 is connected to the top end of the connecting rod 105. The connecting sleeve 106 is pivotally connected to the end mill tip 107. The end mill tip 107 can drive the connecting sleeve 106 to move in the vertical direction. A support block 108 abuts against the outer wall of the part 1. The support block 108 and the end mill tip 109 are on the same horizontal line. The support block 108 is used to apply a supporting force toward the end mill tip 109 to the side wall of the part 1. A vibration damping mechanism 102 is disposed on the connecting rod 105. The vibration damping mechanism 102 is connected to the support block 108 and is used to suppress the vibration of the support block 108.

[0032] The working principle of the above embodiments is briefly described below:

[0033] The deep cavity part 1 to be processed is clamped on the chuck 101 to fix the part 1. Then the machine tool is turned on and the machine tool drives the end mill to rotate. When the end mill is used to cut the inner wall of the cylindrical part 1, the cutting tip 109 of the end mill cuts the inner wall of the part 1. The cutting force on the rotating cutting tip 109 is uneven, which causes the cutting tip 109 to vibrate. Since the side wall of the deep cavity part 1 is relatively thin, the vibration of the cutting tip 109 will cause the position on the side wall of the part 1 that contacts the cutting tip 109 to vibrate, affecting the machining accuracy of the workpiece. When the side wall of part 1 vibrates, the vibration is transmitted to the support block 108, which in turn transmits the vibration to the damping mechanism 102. The support block 108 applies a supporting force toward the tip 109 of the end mill to the side wall of part 1. Under the action of the damping mechanism 102, the vibration of the support block 108 and the side wall of part 1 can be effectively suppressed. When the end mill moves circumferentially along the inner wall of part 1, the end mill tip 107 drives the connecting sleeve 106 to rotate around the central axis of the chuck 101. The connecting sleeve 106 drives the connecting rod 105 connected to it to rotate around the central axis of the chuck 101. The connecting rod 105 drives the damping mechanism 102 and the support block 108 to rotate around the central axis of the chuck 101, so that the support block 108 can move with the movement of the end mill tip 107, ensuring that the supporting force applied by the support block 108 to the side wall of part 1 is always toward the tip 109 of the end mill, thereby ensuring the damping effect of the damping mechanism 102 on the vibration of the side wall of part 1. When the tip 109 of the end mill moves downward, the end mill head 107 drives the connecting sleeve 106 to move downward, and the connecting sleeve 106 drives the connecting rod 105 to move downward, thereby driving the vibration damping mechanism 102 and the support block 108 to move downward. This allows the support block 108 to move synchronously with the tip 109 of the end mill, thereby ensuring that the support force applied by the support block 108 to the side wall of the part 1 is always directed towards the tip 109 of the end mill, and further ensuring the damping effect of the vibration damping mechanism 102 on the vibration of the side wall of the part 1.

[0034] The assembly machining fixture for deep cavity machining of die-forged aluminum alloy of the present invention can support and buffer the cutting area of ​​the side wall of the part 1 when performing deep cavity machining, thereby suppressing the vibration of the side wall of the part 1 and ensuring the machining accuracy of the part 1.

[0035] Based on the above embodiments, in order to ensure that the supporting force applied by the support block 108 to the side wall of part 1 is always directed toward the tip of the end mill 109, thereby further ensuring the suppression effect of the entire machining fixture on the vibration of the side wall of part 1 and ensuring the machining accuracy of part 1.

[0036] like Figure 1 , Figure 2 and Figure 4As shown, a connecting shaft 201 is connected to the slip ring 103. The axis of the connecting shaft 201 is collinear with the axis of the part 1. A connecting plate 202 is also provided between the connecting rod 105 and the connecting sleeve 106. One end of the connecting plate 202 is connected to the connecting rod 105, and the other end of the connecting plate 202 is provided with a second sliding hole. The connecting plate 202 is slidably connected to the connecting shaft 201 through the second sliding hole. The connecting plate 202 is provided with a sliding groove 203 along the radial direction of the part 1. A first slider 204 is provided on the side wall of the connecting sleeve 106. The first slider 204 is slidably connected in the sliding groove 203.

[0037] By setting up the connecting shaft 201 and the connecting plate 202, when the end mill moves circumferentially along the inner wall of the part 1, the end mill tip 107 drives the connecting sleeve 106 to rotate around the axis of the connecting shaft 201, thereby driving the connecting plate 202 to rotate around the axis of the connecting shaft 201. Since the top end of the connecting rod 105 is connected to the connecting shaft 201 through the connecting plate 202, the stiffness of the connecting rod 105 can be increased, thereby preventing the insufficient stiffness of the connecting rod 105 from affecting the vibration damping mechanism 102's vibration suppression effect. Furthermore, when the end mill is used to machine cylindrical parts 1 with different inner diameters, the position of the end mill along the radial direction of the chuck 101 is adjusted. The end mill tip 107 drives the connecting sleeve 106 to move radially along the chuck 101. The connecting sleeve 106 drives the first slider 204 to slide in the slide groove 203, guiding the movement of the connecting sleeve 106. This further ensures the accurate relative position of the end mill tip 109 and the support block 108, thus ensuring that the support force applied by the support block 108 to the side wall of the part 1 is always directed towards the end mill tip 109. This further ensures the suppression effect of the entire machining fixture on the vibration of the side wall of the part 1, and ensures the machining accuracy of the part 1.

[0038] As a preferred option, such as Figure 1 and Figure 5As shown, the connecting rod 105 is provided with a pressure strip 301. One end of the pressure strip 301 abuts against the top of the side wall of the part 1. The pressure strip 301 is used to apply a vertically downward pressing force to the side wall of the part 1. The other end of the pressure strip 301 is provided with a limiting sliding hole 302. The outer wall of the connecting rod 105 matches the limiting sliding hole 302. The pressure strip 301 is slidably connected to the outer wall of the connecting rod 105 through the limiting sliding hole 302. The limiting sliding hole 302 is used to restrict the pressure strip 301 from rotating relative to the connecting rod 105. The connecting rod 105 is provided with a first spring 303. The first spring 303 abuts against the top of the pressure strip 301. The first spring 303 is used to apply a vertically downward elastic force to the pressure strip 301. By setting the pressure bar 301, when the tip 109 of the end mill moves downward to cut the inner wall of part 1, the end mill head 107 drives the connecting sleeve 106 to move downward, the connecting sleeve 106 drives the connecting plate 202 to move downward, thereby driving the connecting rod 105 to move downward, and thus driving the pressure bar 301 to move downward until the pressure bar 301 abuts against the upper edge of the side wall of part 1. As the end mill continues to move downward, the connecting rod 105 continues to move downward. With the support of the side wall of part 1, the pressure bar 301 no longer moves downward, and the connecting rod 105 moves downward relative to the pressure bar 301, thereby compressing the first spring 303 on the connecting rod 105. The first spring 303 applies a vertically downward elastic force to the pressure bar 301, thereby applying a vertical compressive force to the side wall of part 1, thereby preventing vertical vibration of the side wall of part 1 during cutting, and more effectively ensuring the machining accuracy of part 1. Furthermore, due to the limiting effect of the limiting sliding hole 302, the pressure strip 301 can be prevented from rotating relative to the connecting rod 105, thereby ensuring that the pressure strip 301 can always be pressed against the side wall of the part 1, thereby further preventing the side wall of the part 1 from vibrating.

[0039] As a preferred option, such as Figure 1As shown, the connecting rod 105 has an external thread, which is connected to an adjusting nut 4. The top end of the first spring 303 abuts against the adjusting nut 4, and the bottom end of the first spring 303 abuts against the pressure bar 301. The adjusting nut 4 is used to adjust the preload of the first spring 303. By setting the adjusting nut 4, when the tip 109 of the end mill moves downward to cut the inner wall of the part 1, the end mill head 107 drives the connecting sleeve 106 to move downward, thereby driving the connecting rod 105 to move downward. The connecting rod 105 drives the adjusting nut 4 to move downward, thereby squeezing the first spring 303. The first spring 303 is subjected to a vertically downward elastic force on the pressure bar 301, thereby using the pressure bar 301 to press the side wall of the part 1 onto the chuck 101. By rotating the adjusting nut 4, the position of the adjusting nut 4 relative to the pressure bar 301 can be adjusted, thereby adjusting the compression of the first spring 303, thereby adjusting the vertical downward elastic force applied by the first spring 303 to the pressure bar 301, thereby adjusting the clamping force applied by the pressure bar 301 to the side wall of the part 1. This prevents the part 1 from deforming due to its thin wall thickness when the clamping force applied by the pressure bar 301 to the side wall of the part 1 is too large, and also prevents the part 1 from being difficult to press the side wall of the part 1 onto the chuck 101 when the clamping force applied by the pressure bar 301 to the side wall of the part 1 is too small.

[0040] As a preferred option, such as Figure 1 and Figure 5 As shown, the pressure strip 301 is pivotally connected to a roller 5 at one end away from the limiting sliding hole 302. The axial direction of the roller 5 is along the radial direction of the part 1. The outer wall of the roller 5 presses against the upper edge of the side wall of the part 1. The roller 5 is used to apply a vertically downward pressing force to the side wall of the part 1. By setting the roller 5, when the end mill moves circumferentially along the inner wall of the part 1, the end mill tip 107 drives the connecting sleeve 106 to rotate around the central axis of the chuck 101. The connecting sleeve 106 drives the connecting rod 105 to rotate around the central axis of the chuck 101. The connecting rod 105 drives the pressure strip 301 to rotate around the central axis of the chuck 101. At this time, since the pressure strip 301 is pressed against the upper edge of the side wall of the part 1 by the roller 5, the friction between the pressure strip 301 and the side wall of the part 1 can be reduced when the pressure strip 301 rotates around the central axis of the chuck 101, which is also the central axis of the part 1, thereby preventing the pressure strip 301 from scratching the upper edge of the side wall of the part 1.

[0041] As a preferred option, such as Figure 1 and Figure 6As shown, the vibration damping mechanism 102 includes a cylinder liner 601, a piston 602, and a second spring 603. The cylinder liner 601 is horizontally arranged and fixedly connected to the connecting rod 105. The piston 602 is slidably connected inside the cylinder liner 601. The support block 108 is fixedly connected to the piston 602. The second spring 603 is located inside the cylinder liner 601 and abuts against the piston 602. The second spring 603 is used to apply an elastic force to the piston 602. The side wall of the cylinder liner 601 is provided with a vent hole 604, which communicates with the inner cavity of the cylinder liner 601. When the side wall of part 1 vibrates horizontally, the vibration is transmitted to the piston 602 through the support block 108. Since the second spring 603 inside the cylinder liner 601 abuts against the piston 602, the second spring 603 inside the cylinder liner 601 can alleviate the vibration of the piston 602, thereby reducing the vibration of the piston 602, and further reducing the vibration of the support block 108 and the side wall of part 1. At the same time, when the piston 602 vibrates, the volume of the inner cavity of the cylinder liner 601 reciprocates. The inner cavity of the cylinder liner 601 is connected to the atmosphere through the vent hole 604. Therefore, the vibration of the piston 602 causes air to reciprocate into or out of the inner cavity of the cylinder liner 601 through the vent hole 604. When the air passes through the vent hole 604, due to the certain viscosity of the air, the vent hole 604 will exert a certain resistance to the airflow, thereby consuming the kinetic energy of the airflow, thus consuming the kinetic energy of the piston 602 when it vibrates, thus consuming the kinetic energy of the side wall of part 1 when it vibrates, thereby further reducing the vibration of the side wall of part 1.

[0042] As a preferred option, such as Figure 1 and Figure 6 As shown, a pressure sensor 701 is provided inside the cylinder liner 601. The second spring 603 abuts against the pressure sensor 701. The pressure sensor 701 is used to detect the real-time elastic force of the second spring 603. The vent 604 is connected to a speed control valve 702. The speed control valve 702 is electrically connected to a controller. The controller is electrically connected to the pressure sensor 701. The controller controls the speed control valve 702 to operate according to the peak value of the real-time elastic force of the second spring 603. The higher the peak value of the real-time elastic force of the second spring 603, the smaller the opening of the speed control valve 702. By setting a pressure sensor 701, the real-time elastic force of the second spring 603 is detected. When the cutting amount of the end mill 107 on the side wall of part 1 increases, the vibration amplitude of the side wall of part 1 will increase, the peak value of the real-time elastic force of the second spring 603 will increase, and the vibration amplitude of the piston 602 will increase. At this time, the controller controls the opening of the speed regulating valve 702 to decrease, thereby increasing the resistance encountered by the airflow when passing through the vent 604, thereby increasing the kinetic energy consumed by the airflow when passing through the vent 604, increasing the kinetic energy consumed when the piston 602 vibrates, and thus increasing the kinetic energy consumed when the side wall of part 1 vibrates, so as to improve the vibration suppression effect of this device on the side wall of part 1.

[0043] As a preferred option, such as Figure 1 and Figure 2 As shown, the top end of the connecting rod 105 is provided with an adjustment mechanism 8, which is used to adjust the distance between the connecting rod 105 and the axis of the chuck 101. By setting the adjustment mechanism 8, the distance between the connecting rod 105 and the axis of the chuck 101 can be adjusted, thereby accommodating parts 1 of different diameters and improving the adaptability of the device.

[0044] As a preferred option, such as Figure 1 and Figure 2 As shown, the adjusting mechanism 8 includes a pressure block 901 and a rack 902. The connecting plate 202 is provided with a through groove 903 along the radial direction of the part 1. The pressure block 901 is fixed to the top of the connecting rod 105. The rack 902 is provided on the connecting plate 202. The length direction of the rack 902 is parallel to the length direction of the through groove 903. The pressure block 901 is provided with a toothed block 904. The top of the connecting rod 105 passes through the through groove 903 and is connected to a nut sleeve 905. The nut sleeve 905 is used to drive the pressure block 901 to apply a pressing force to the rack 902 so that the toothed block 904 on the pressure block 901 engages with the rack 902. When processing parts 1 of different diameters, the connecting rod 105 is slid along the length of the through groove 903 to adjust the distance between the connecting rod 105 and the side wall of part 1 until the support block 108 abuts against the side wall of part 1 and the compression of the second spring 603 is appropriate. Then, by tightening the nut sleeve 905, the pressure block 901 is driven to move towards the rack 902 until the tooth block 904 on the pressure block 901 is in direct contact with the rack 902. The rack 902 and the tooth block 904 restrict the connecting rod 105 from sliding in the through groove 903, thereby preventing the connecting rod 105 from vibrating with the cylinder liner 601 of the vibration damping mechanism 102, thus ensuring the vibration damping performance of the entire device.

[0045] As a preferred option, such as Figure 1 and Figure 3 As shown, the slip ring 103 is provided with a plurality of first sliding holes 104, which are arranged along the length of the through groove 903. By providing a plurality of first sliding holes along the length of the through groove, the connecting rod 105 can be inserted into the first sliding holes 104 at different positions to accommodate parts 1 of different diameters. The first sliding holes 104 can prevent the connecting rod 105 from vibrating, ensuring the vibration reduction performance of the entire device.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A set of machining fixtures for deep cavity machining of die-forged aluminum alloy, comprising a chuck (101), wherein the chuck (101) is used to clamp the deep cavity part (1) to be machined, characterized in that, Also includes: The slip ring (103) is pivotally connected to the outer wall of the chuck (101). The slip ring (103) can rotate around the central axis of the chuck (101). The bottom end of the slip ring (103) is provided with a first vertical sliding hole (104). The connecting rod (105) is vertically arranged, and the bottom end of the connecting rod (105) is slidably connected to the first sliding hole (104); A connecting sleeve (106) is connected to the top of the connecting rod (105). The connecting sleeve (106) is pivotally connected to the end mill tip (107). The end mill tip (107) can drive the connecting sleeve (106) to move in the vertical direction. A support block (108) abuts against the outer wall of the part (1). The support block (108) and the tip (109) of the end mill are on the same horizontal line. The support block (108) is used to apply a supporting force toward the tip (109) of the end mill to the side wall of the part (1). A vibration damping mechanism (102) is disposed on the connecting rod (105) and is connected to the support block (108) to suppress the vibration of the support block (108).

2. The group machining fixture for deep cavity machining of die-forged aluminum alloy as described in claim 1, characterized in that, A connecting shaft (201) is connected to the slip ring (103). The axis of the connecting shaft (201) is collinear with the axis of the part (1). A connecting plate (202) is also provided between the connecting rod (105) and the connecting sleeve (106). One end of the connecting plate (202) is connected to the connecting rod (105), and the other end of the connecting plate (202) is provided with a second sliding hole. The connecting plate (202) is slidably connected to the connecting shaft (201) through the second sliding hole. A sliding groove (203) along the radial direction of the part (1) is provided on the connecting plate (202). A first slider (204) is provided on the side wall of the connecting sleeve (106), and the first slider (204) is slidably connected in the sliding groove (203).

3. The group machining fixture for deep cavity machining of die-forged aluminum alloy as described in claim 2, characterized in that, The connecting rod (105) is provided with a pressure strip (301). One end of the pressure strip (301) abuts against the top of the side wall of the part (1). The pressure strip (301) is used to apply a vertically downward pressing force to the side wall of the part (1). The other end of the pressure strip (301) is provided with a limiting sliding hole (302). The outer wall of the connecting rod (105) matches the limiting sliding hole (302). The pressure strip (301) is slidably connected to the outer wall of the connecting rod (105) through the limiting sliding hole (302). The limiting sliding hole (302) is used to restrict the pressure strip (301) from rotating relative to the connecting rod (105). The connecting rod (105) is provided with a first spring (303). The first spring (303) abuts against the top of the pressure strip (301). The first spring (303) is used to apply a vertically downward elastic force to the pressure strip (301).

4. The group machining fixture for deep cavity machining of die-forged aluminum alloy as described in claim 3, characterized in that, The connecting rod (105) is provided with an external thread, and the external thread is connected to an adjusting nut (4). The top end of the first spring (303) abuts against the adjusting nut (4), and the bottom end of the first spring (303) abuts against the pressure bar (301). The adjusting nut (4) is used to adjust the pre-elastic force of the first spring (303).

5. The group machining fixture for deep cavity machining of die-forged aluminum alloy as described in claim 4, characterized in that, The pressure strip (301) is pivotally connected to a roller (5) at the end away from the limiting sliding hole (302). The axial direction of the roller (5) is along the radial direction of the part (1). The outer wall of the roller (5) is pressed against the top of the side wall of the part (1). The roller (5) is used to apply a vertical downward pressing force to the side wall of the part (1).

6. The group machining fixture for deep cavity machining of die-forged aluminum alloy as described in claim 1, characterized in that, The vibration damping mechanism (102) includes a cylinder liner (601), a piston (602), and a second spring (603). The cylinder liner (601) is horizontally arranged and fixedly connected to the connecting rod (105). The piston (602) is slidably connected inside the cylinder liner (601). The support block (108) is fixedly connected to the piston (602). The second spring (603) is located inside the cylinder liner (601) and abuts against the piston (602). The second spring (603) is used to apply an elastic force to the piston (602). The side wall of the cylinder liner (601) is provided with a vent hole (604), which communicates with the inner cavity of the cylinder liner (601).

7. The group machining fixture for deep cavity machining of die-forged aluminum alloy as described in claim 6, characterized in that, A pressure sensor (701) is provided inside the cylinder liner (601). The second spring (603) abuts against the pressure sensor (701). The pressure sensor (701) is used to detect the real-time elastic force of the second spring (603). The vent (604) is connected to a speed control valve (702). The speed control valve (702) is electrically connected to a controller. The controller is electrically connected to the pressure sensor (701). The controller controls the speed control valve (702) to operate according to the peak value of the real-time elastic force of the second spring (603). The higher the peak value of the real-time elastic force of the second spring (603), the smaller the opening of the speed control valve (702).

8. The group machining fixture for deep cavity machining of die-forged aluminum alloy as described in claim 1, characterized in that, The top of the connecting rod (105) is provided with an adjustment mechanism (8), which is used to adjust the distance between the connecting rod (105) and the axis of the chuck (101).

9. The group machining fixture for deep cavity machining of die-forged aluminum alloy as described in claim 8, characterized in that, The adjusting mechanism (8) includes a pressure block (901) and a rack (902). The connecting plate (202) is provided with a through groove (903) along the radial direction of the part (1). The pressure block (901) is fixed to the top of the connecting rod (105). The rack (902) is provided on the connecting plate (202). The length direction of the rack (902) is parallel to the length direction of the through groove (903). The pressure block (901) is provided with a toothed block (904). The top of the connecting rod (105) passes through the through groove (903) and is connected to a nut sleeve (905). The nut sleeve (905) is used to drive the pressure block (901) to apply a pressing force to the rack (902) so that the toothed block (904) on the pressure block (901) meshes with the rack (902).

10. The group machining fixture for deep cavity machining of die-forged aluminum alloy as described in claim 9, characterized in that, The slip ring (103) is provided with a plurality of first sliding holes (104), which are arranged along the length direction of the through groove (903).

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