Machining tool for radar die casting shell
By designing a radar housing machining fixture that includes a four-axis rotary table and a cylinder-driven pressure rod, the problems of loosening and error accumulation in the machining of irregularly shaped housings were solved, achieving efficient and high-precision double-sided machining and ensuring the stability and accuracy of parts during the machining process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2026-05-08
AI Technical Summary
In the existing technology, the irregular structure of the radar housing leads to unreasonable fixture design, which easily causes workpiece loosening and deformation, affecting processing efficiency and accuracy. Moreover, multiple clamping leads to error accumulation, making it difficult to achieve high-precision processing.
A machining fixture for radar die-cast parts housings is adopted, including a four-axis rotary table, a driven rotary table, a bridge plate, an arc-shaped cover plate, and a cylinder-driven pressure bar system. The fixture can machine both sides of the part in one clamping. Combined with an elastic layer and a spinning cylinder, it ensures stable support and clamping of the part.
It achieves stable support and clamping of parts, avoids positional deviation and reduced machining accuracy caused by multiple clamping, improves machining efficiency and accuracy, reduces tool vibration, and enhances the uniformity and stability of the holding force.
Smart Images
Figure CN121989060A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of CNC machining technology, and in particular to a machining fixture for a radar die-cast housing. Background Technology
[0002] LiDAR is an active detection technology that can accurately and quickly acquire three-dimensional spatial information about the ground or atmosphere. It can easily achieve 3D modeling and has a wide range of applications and development prospects. The radar housing is used to protect and fix the radar equipment, and is usually made of materials such as metal or plastic. For radar housing blanks formed by die casting, CNC machining is required to transform the blanks into finished radar housing products.
[0003] Radar housing blanks formed by die casting are generally irregularly shaped. Due to the small tolerances and high requirements for form and position tolerances of irregularly shaped housing parts, it is very easy for workpieces to loosen or deform during machining due to unreasonable fixture design, which affects machining efficiency and accuracy. In addition, repeated clamping of radar housing blanks will further lead to the accumulation of machining errors, affecting machining accuracy. Summary of the Invention
[0004] The main objective of this invention is to provide a machining fixture for radar die-cast housings, which can achieve machining of both sides of the part in one clamping, provide stable support and clamping for parts with complex structures and few flat surfaces, and improve the uniformity and stability of the clamping force on the part.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a machining fixture for a radar die-cast housing, used for clamping the part, comprising: a four-axis rotary table, a driven rotary table that cooperates with the four-axis rotary table, and a bridge plate connecting the flanges of the four-axis rotary table and the driven rotary table respectively. The part includes an inclined arc-shaped cover plate. The front edge of the arc-shaped cover plate, which is higher than the rear edge, has a downwardly extending side plate, thereby forming a cavity between the side plate and the arc-shaped cover plate. A horizontally outwardly extending flange strip is formed at the lower end of the side plate. The lower surface of this flange strip is flush with the lower end face of the rear edge of the arc-shaped cover plate. Several outwardly extending first scrap strips are connected to the edge of the flange strip and the rear edge of the arc-shaped cover plate. The upper surface of a support plate mounted on the bridge plate is provided with several contour pads that can be embedded into the shell cavity of the part and contact the lower surface of the arc-shaped cover plate, and several support pads that are used to contact the lower surface of the upper flange strip of the part. At least two cylinders are mounted on the bridge plate and located on the outside of the support plate. The lower surface of a movable pressure plate located above the contour pads and support pads is connected to the piston rod of each cylinder. Several first pressure rods and several second pressure rods are installed on the lower surface of the movable pressure plate, which can move up and down with the piston rod of the cylinder. The lower end face of the first pressure rod connected to the movable pressure plate at its upper end is used to press and contact the upper surface of the upper flange strip of the part, and the lower end face of the second pressure rod connected to the movable pressure plate at its upper end is used to press and contact the upper surface of the arc-shaped cover plate. The upper surface of the arc-shaped cover plate has at least one upper processing area, and the lower surface of the arc-shaped cover plate has at least one lower processing area. The movable pressure plate has at least one upper through hole corresponding to the upper processing area. The bridge plate and the support plate each have at least one lower through hole corresponding to the lower processing area. Several forward and upward extending second waste strips are connected to the side plate. The ends of each of the several second waste strips away from the side plate are connected to a material head. A support seat is provided on the upper surface of the bridge plate and in front of the support plate. A spinning cylinder is installed on the upper surface of the support seat, which is located corresponding to the material head on the part, away from the support plate. The spinning cylinder is used to press and cooperate with the upper surface of the material head.
[0006] The following are further improvements to the above technical solution: 1. In the above scheme, a portion of the second pressure rods are spaced apart along the edge of the upper through hole, and another portion of the second pressure rods are spaced apart along the rear edge of the arc-shaped cover plate.
[0007] 2. In the above scheme, the upper surface of the support base near the support plate is set as an inclined surface corresponding to the lower surface of the material head.
[0008] 3. In the above scheme, a pin is installed on each side of the upper surface of the support base near the support plate, and the two pins and the spinning cylinder form an area for the material head on the part to be embedded.
[0009] 4. In the above scheme, the first pressure bar and the second pressure bar each include a body and an elastic layer covering the outer side of the body away from the movable pressure plate.
[0010] 5. In the above scheme, the elastic layer is a silicone layer, a rubber layer, or a urethane layer.
[0011] 6. In the above scheme, the lower end face of the second pressure rod is set as an inclined surface consistent with the direction of inclination.
[0012] 7. In the above scheme, the integrally formed part is the die-cast housing of the lidar.
[0013] 8. In the above scheme, the two ends of the bridge plate are respectively connected to the flanges of the four-axis turntable and the driven turntable through an L-shaped block.
[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The machining fixture for the radar die-cast housing of the present invention includes a bridge plate connecting a four-axis rotary table and a driven rotary table. A support plate mounted on the bridge plate has several contour pads that can be correspondingly embedded into the housing cavity of the part and contact the lower surface of an arc-shaped cover plate, and several support pads that contact the lower surface of the upper flange strip of the part. At least two cylinders are mounted on the bridge plate and located outside the support plate. The lower surface of a movable pressure plate located above the contour pads and support pads is connected to the piston rod of each cylinder. Several spaced-apart first pressure rods and several spaced-apart second pressure rods are mounted on the lower surface of the movable pressure plate, which can move up and down with the piston rod of the cylinder. The lower end face of the first pressure rod, whose upper end is connected to the movable pressure plate, is used for pressing contact with the upper surface of the upper flange strip of the part. The lower end face of the second pressure rod, whose upper end is connected to the movable pressure plate, is used for pressing contact with the upper surface of the arc-shaped cover plate. The upper surface of the arc-shaped cover plate has at least one upper machining area. The lower surface of the arc-shaped cover plate has at least one lower machining area, and the movable pressure plate has at least one upper through hole corresponding to the upper machining area. The bridge plate and the support plate each have at least one lower through hole corresponding to the lower machining area. This allows for machining of both sides of the part in a single clamping, saving machining steps, improving machining efficiency, and avoiding the problem of reduced machining accuracy due to positional deviations caused by multiple clamping. It can also provide stable support and clamping for parts with complex structures and few flat surfaces, ensuring the stability of the part's position throughout the double-sided machining process. It can also prevent local vibration in the machining area from causing tool marks, thus improving machining quality. Furthermore, each of the first and second pressure rods includes a body and an elastic layer covering the outer side of the body away from the movable pressure plate, improving the uniformity and stability of the pressure force on the part. This can prevent damage to the part and avoid the formation of machining tool marks due to vibration caused by the force on the part during machining.
[0015] 2. The machining fixture for the radar die-cast housing of the present invention has several forward and upward extending second scrap strips connected to its side plate. Each of the several second scrap strips is connected to a material head at one end away from the side plate. A support seat is provided on the upper surface of the bridge plate and in front of the support plate. A spinning cylinder is installed on the upper surface of the support seat corresponding to the material head on the part, at the end away from the support plate, for pressing and cooperating with the upper surface of the material head. This can improve the overall positional stability of the part by clamping and positioning the material head, and facilitate the removal of the material head after machining and cutting, while avoiding the situation where the material head falls off after being cut. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of the part processed according to the present invention; Figure 2 This is a bottom view of the structure of the part after processing in this invention; Figure 3 This is a schematic diagram of the overall structure of the machining tooling for the radar die-cast housing of the present invention; Figure 4 This is a partial structural schematic diagram of the machining tooling for the radar die-cast housing of the present invention; Figure 5 This is a schematic diagram of the machining tooling for the radar die-cast housing of the present invention, viewed from below. Figure 6 This is a partial structural exploded view of the machining tooling of the present invention from one perspective; Figure 7 This is a partial structural exploded view of the machining tooling of the present invention from another perspective; Figure 8 This is a magnified view of a portion of the part processed according to the present invention under a pressing state.
[0017] In the above attached figures: 100, part; 101, arc-shaped cover plate; 102, side plate; 103, shell cavity; 104, flange strip; 105, first scrap strip; 106, second scrap strip; 107, material head; 200, four-axis rotary table; 300, driven rotary table; 400, L-shaped block; 1, bridge plate; 2, support plate; 31, contour pad; 32, support pad; 4, cylinder; 41, support block; 5, movable pressure plate; 51, guide sleeve; 52, guide post; 61, first pressure rod; 62, second pressure rod; 7, support seat; 8, spinning cylinder; 9, pin; 10, upper through hole; 11, lower through hole; 12, body; 13, elastic layer. Detailed Implementation
[0018] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.
[0019] Example 1: A machining fixture for a radar die-cast housing, used for clamping part 100, includes: a four-axis rotary table 200, a driven rotary table 300 that cooperates with the four-axis rotary table 200, and a bridge plate 1 connecting the flanges of the four-axis rotary table 200 and the driven rotary table 300 respectively. The part 100 includes an inclined arc-shaped cover plate 101. The front edge of the arc-shaped cover plate 101, which is higher than the rear edge, has a downwardly extending side plate 102, thereby forming a cavity 103 between the side plate 102 and the arc-shaped cover plate 101. A horizontally outwardly extending flange strip 104 is formed at the lower end of the side plate 102. The lower surface of the flange strip 104 is flush with the lower end face of the rear edge of the arc-shaped cover plate 101. Several outwardly extending first scrap strips 105 are connected to the edge of the flange strip 104 and the rear edge of the arc-shaped cover plate 101. A support plate 2 mounted on the bridge plate 1 has several contoured pads 31 on its upper surface that can be embedded into the cavities 103 of the part 100 and contact the lower surface of the arc-shaped cover plate 101, and several support pads 32 that contact the lower surface of the flange strip 104 on the part 100. At least two cylinders 4 are mounted on the bridge plate 1 and on the outside of the support plate 2. The lower surface of a movable pressure plate 5 located above the contoured pads 31 and support pads 32 respectively contacts the lower surface of each cylinder 4. The piston rod of cylinder 4 is connected to the movable pressure plate 5, which can move up and down with the piston rod of cylinder 4. Several first pressure rods 61 and several second pressure rods 62 are installed on the lower surface of the movable pressure plate 5. The lower end face of the first pressure rod 61, which is connected to the movable pressure plate 5 at its upper end, is used to press and contact the upper surface of the flange strip 104 on the part 100. The lower end face of the second pressure rod 62, which is connected to the movable pressure plate 5 at its upper end, is used to press and contact the upper surface of the arc-shaped cover plate 101. The upper surface of the arc-shaped cover plate 101 has at least one upper processing area, and the lower surface of the arc-shaped cover plate 101 has at least one lower processing area. The movable pressure plate 5 has at least one upper through hole 10 corresponding to the upper processing area. The bridge plate 1 and the support plate 2 each have at least one lower through hole 11 corresponding to the lower processing area. The side plate 102 is connected to a plurality of forward and upward extending second waste strips 106. The ends of each of the plurality of second waste strips 106 away from the side plate 102 are connected to a material head 107. The upper surface of the bridge plate 1 and the front side of the support plate 2 are provided with a support seat 7. The upper surface of the support seat 7, which is provided corresponding to the material head 107 on the part 100, away from the support plate 2, is equipped with a spinning cylinder 8 for pressing and engaging with the upper surface of the material head 107.
[0020] A portion of the aforementioned second pressure rods 62 are spaced along the edge of the upper through hole 10, and another portion of the second pressure rods 62 are spaced along the rear edge of the arc-shaped cover plate 101. The first pressure rod 61 and the second pressure rod 62 each include a body 12 and an elastic layer 13 covering the outer side of the body 12 away from the movable pressure plate 5; the elastic layer 13 is an urethane layer. The integrally formed part 100 is the die-cast housing of the lidar; the two ends of the bridge plate 1 are respectively connected to the flanges of the four-axis turntable 200 and the driven turntable 300 through an L-shaped block 400. The four-axis turntable and the driven turntable used in conjunction are all purchased externally and belong to the scope of existing technology, which will not be described in detail here.
[0021] Example 2: A machining fixture for a radar die-cast housing, used for clamping part 100, includes: a four-axis rotary table 200, a driven rotary table 300 that cooperates with the four-axis rotary table 200, and a bridge plate 1 connecting the flanges of the four-axis rotary table 200 and the driven rotary table 300 respectively. The part 100 includes an inclined arc-shaped cover plate 101. The front edge of the arc-shaped cover plate 101, which is higher than the rear edge, has a downwardly extending side plate 102, thereby forming a cavity 103 between the side plate 102 and the arc-shaped cover plate 101. A horizontally outwardly extending flange strip 104 is formed at the lower end of the side plate 102. The lower surface of the flange strip 104 is flush with the lower end face of the rear edge of the arc-shaped cover plate 101. Several outwardly extending first scrap strips 105 are connected to the edge of the flange strip 104 and the rear edge of the arc-shaped cover plate 101. A support plate 2 mounted on the bridge plate 1 has several contoured pads 31 on its upper surface that can be embedded into the cavities 103 of the part 100 and contact the lower surface of the arc-shaped cover plate 101, and several support pads 32 that contact the lower surface of the flange strip 104 on the part 100. At least two cylinders 4 are mounted on the bridge plate 1 and on the outside of the support plate 2. The lower surface of a movable pressure plate 5 located above the contoured pads 31 and support pads 32 respectively contacts the lower surface of each cylinder 4. The piston rod of cylinder 4 is connected to the movable pressure plate 5, which can move up and down with the piston rod of cylinder 4. Several first pressure rods 61 and several second pressure rods 62 are installed on the lower surface of the movable pressure plate 5. The lower end face of the first pressure rod 61, which is connected to the movable pressure plate 5 at its upper end, is used to press and contact the upper surface of the flange strip 104 on the part 100. The lower end face of the second pressure rod 62, which is connected to the movable pressure plate 5 at its upper end, is used to press and contact the upper surface of the arc-shaped cover plate 101. The upper surface of the arc-shaped cover plate 101 has at least one upper processing area, and the lower surface of the arc-shaped cover plate 101 has at least one lower processing area. The movable pressure plate 5 has at least one upper through hole 10 corresponding to the upper processing area. The bridge plate 1 and the support plate 2 each have at least one lower through hole 11 corresponding to the lower processing area. The side plate 102 is connected to a plurality of forward and upward extending second waste strips 106. The ends of each of the plurality of second waste strips 106 away from the side plate 102 are connected to a material head 107. The upper surface of the bridge plate 1 and the front side of the support plate 2 are provided with a support seat 7. The upper surface of the support seat 7, which is provided corresponding to the material head 107 on the part 100, away from the support plate 2, is equipped with a spinning cylinder 8 for pressing and engaging with the upper surface of the material head 107. The spinning cylinder is purchased externally and is within the scope of prior art, so it will not be described in detail here.
[0022] The upper surface of the support base 7 near the support plate 2 is set as an inclined surface corresponding to the lower surface of the material head 107; a pin 9 is installed on each side of the upper surface of the support base 7 near the support plate 2, and the two pins 9 and the spinning cylinder 8 form an area for the material head 107 on the part 100 to be embedded. The aforementioned elastic layer 13 is a rubber layer; the lower end face of the aforementioned second pressure rod 62 is set as an inclined surface consistent with the inclination direction; The piston rods of the four cylinders 4 are respectively connected to the four corners of the movable pressure plate 5; each cylinder 4 is mounted on the upper surface of the bridge plate 1 by a support block 41. The two ends of the aforementioned movable pressure plate 5 are movably connected to the bridge plate 1 through a set of mutually cooperating guide sleeves 51 and guide posts 52; the two guide posts 52 are respectively installed on the lower surfaces of the two ends of the movable pressure plate 5, and the two guide sleeves 51 are respectively installed on the bridge plate 1.
[0023] The machining fixture for radar die-cast housings of the present invention can achieve machining of both sides of the part in one clamping, saving machining steps and improving machining efficiency, and avoiding the problem of reduced machining accuracy caused by positional deviation due to multiple clamping. It can also provide stable support and clamping for parts with complex structures and few flat surfaces, ensuring the stability of the part's position throughout the double-sided machining process. Furthermore, it can prevent local vibration in the machining area from causing tool marks, thus improving machining quality. Furthermore, it improves the uniformity and stability of the pressure applied to the parts, which can prevent damage to the parts and avoid the formation of machining marks due to vibration caused by the force applied to the parts during processing. In addition, it can improve the overall positional stability of the parts by clamping and positioning the material head, and facilitate the removal of the material head after processing, while preventing the material head from falling off after being cut.
[0024] Working principle: When in use, first place the support plate that can rotate with the bridge plate in a horizontal position with the upper surface facing upward, and at the same time place the piston rod of the cylinder in an extended position so that the movable pressure plate that moves up and down with it is in a position away from the support plate, and at the same time place the spinning cylinder on the support base in a non-pressing position. Next, the parts to be processed are installed on the contour pads and support pads, so that the lower surface of the flange strip on the part is in contact with the upper surface of the support pad, and the lower surface of the arc-shaped cover plate on the part is in contact with each contour pad, thereby achieving support and limiting of the part. At the same time, the lower surface of the part loading head and the upper surface of the support base near the support plate are attached and set in the area surrounded by two pins and a spinning cylinder. Next, the piston rod of the cylinder drives the movable pressure plate to move towards the part until the first and second pressure rods of different lengths make contact with the surface of the part; at the same time, the spinning cylinder switches to the holding state, and the pressure block on it rotates to the top of the material head and then presses the material head down. By moving the spindle head on the CNC machining table and coordinating with the rotation of the bridge plate driven by the four-axis rotary table, the two sides of the clamped part are milled to remove the first and second scrap strips connected to the edge of the part. Other finishing operations such as drilling and deburring are performed in the upper and lower machining areas on the upper and lower sides of the part. During the above-mentioned processing of both sides of the part, the part with complex structure and few flat surfaces can be stably supported and clamped, ensuring the stability of the part's position throughout the double-sided processing. It can also avoid the local vibration of the processing area, which can cause the tool marks to form due to vibration, thus improving the processing quality. It can also improve the uniformity and stability of the pressure on the part, which can avoid damaging the part and prevent the part from vibrating due to force during processing, thus avoiding the formation of processing tool marks. For the sprue connected to the part through the second scrap bar, the overall position stability of the part can be improved by clamping and positioning the sprue during the processing. At the same time, the sprue can be removed after processing by rotating and moving the spinning cylinder, thus avoiding the situation where the sprue falls off after being cut.
[0025] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.
Claims
1. A machining fixture for a radar die-cast housing, used for clamping a part (100), comprising: The four-axis rotary table (200), the driven rotary table (300) configured to cooperate with the four-axis rotary table (200), and the bridge plate (1) connecting the flanges of the four-axis rotary table (200) and the driven rotary table (300) are characterized in that: the part (100) includes an inclined arc-shaped cover plate (101), and the front edge of the arc-shaped cover plate (101) which is higher than the rear edge has a downwardly extending side plate (102), thereby forming a cavity (103) between the side plate (102) and the arc-shaped cover plate (101). A horizontally outwardly extending flange strip (104) is formed at the lower end of the side plate (102). The lower surface of the flange strip (104) is flush with the lower end face at the rear edge of the arc-shaped cover plate (101). Several outwardly extending first scrap strips (105) are connected to the edge of the flange strip (104) and the rear edge of the arc-shaped cover plate (101). The upper surface of a support plate (2) mounted on the bridge plate (1) is provided with several contour pads (31) that can be embedded into the cavity (103) of the part (100) and in contact with the lower surface of the arc-shaped cover plate (101), and several support pads (32) that are in contact with the lower surface of the flange strip (104) of the part (100). At least two cylinders (4) are mounted on the bridge plate (1) and located on the outside of the support plate (2). The lower surface of a movable pressure plate (5) located above the contour pads (31) and support pads (32) is divided into The movable pressure plate (5), which is not connected to the piston rod of each cylinder (4), is equipped with several spaced first pressure rods (61) and several spaced second pressure rods (62) on its lower surface. The lower end face of the first pressure rod (61), which is connected to the movable pressure plate (5) at its upper end, is used to press and contact the upper surface of the flange strip (104) on the part (100). The lower end face of the second pressure rod (62), which is connected to the movable pressure plate (5) at its upper end, is used to press and contact the upper surface of the arc-shaped cover plate (101). The upper surface of the arc-shaped cover plate (101) has at least one upper processing area, and the lower surface of the arc-shaped cover plate (101) has at least one lower processing area. The movable pressure plate (5) is provided with at least one upper through hole (10) corresponding to the upper processing area. The bridge plate (1) and the support plate (2) are each provided with at least one lower through hole (11) corresponding to the lower processing area. The side plate (102) is connected with a plurality of forward and upward extending second waste strips (106). The ends of the plurality of second waste strips (106) away from the side plate (102) are each connected to a material head (107). The upper surface of the bridge plate (1) and the front side of the support plate (2) are provided with a support seat (7). The upper surface of the support seat (7) corresponding to the material head (107) on the part (100) is provided with a spinning cylinder (8) for pressing and cooperating with the upper surface of the material head (107).
2. The machining fixture for the radar die-cast housing according to claim 1, characterized in that: A portion of the second pressure rods (62) are spaced apart along the edge of the upper through hole (10), and another portion of the second pressure rods (62) are spaced apart along the rear edge of the arc-shaped cover plate (101).
3. The machining fixture for the radar die-cast housing according to claim 1 or 2, characterized in that: The upper surface of the support base (7) near the support plate (2) is set as an inclined surface corresponding to the lower surface of the feed head (107).
4. The machining fixture for the radar die-cast housing according to claim 3, characterized in that: The support base (7) has a pin (9) installed on each side of the upper surface near the support plate (2). The two pins (9) and the spinning cylinder (8) form an area for the material head (107) on the part (100) to be embedded.
5. The machining fixture for the radar die-cast housing according to claim 1 or 2, characterized in that: The first pressure bar (61) and the second pressure bar (62) each include a body (12) and an elastic layer (13) covering the outer side of the body (12) away from the movable pressure plate (5).
6. The machining fixture for the radar die-cast housing according to claim 5, characterized in that: The elastic layer (13) is a silicone layer, a rubber layer, or an urethane layer.
7. The machining fixture for the radar die-cast housing according to claim 6, characterized in that: The lower end face of the second pressure bar (62) is set as an inclined surface consistent with the direction of inclination.
8. The machining fixture for the radar die-cast housing according to claim 1, characterized in that: The integrally formed part (100) is the die-cast housing of the lidar.
9. The machining fixture for the radar die-cast housing according to claim 1, characterized in that: The two ends of the bridge plate (1) are respectively connected to the flanges of the four-axis turntable (200) and the driven turntable (300) via an L-shaped block (400).