CNC machining clamp for special-shaped parts

Abstract

The utility model discloses a CNC (computer numerical control) machining clamp for special-shaped parts, which is used for clamping the parts and comprises a base plate and a support plate mounted on the base plate. The upper surface of the supporting plate is provided with a plurality of profiling cushion blocks which can be correspondingly embedded into a shell cavity of the part and make contact with the lower surface of the arc-shaped cover plate in an attached mode and a plurality of supporting cushion blocks used for making contact with the lower surface of an upper flanging strip of the part. A plurality of first pressing rods distributed at intervals and a plurality of second pressing rods distributed at intervals are installed on the lower surface of the movable pressing plate capable of moving up and down along with a piston rod of the air cylinder, and the lower end faces of the first pressing rods with the upper ends connected with the movable pressing plate are used for making contact with the upper surface of an upper flanging strip of a part in a pressing mode. The lower end face of the second pressing rod with the upper end connected with the movable pressing plate is used for making contact with the upper surface of the arc-shaped cover plate in a pressing mode. The clamping device can stably support and press parts which are complex in structure and have few planes, and position stability of the parts in the machining process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC processing, in particular to a CNC processing fixture for special-shaped parts. Background Art

[0002] LiDAR (LiDAR) uses a laser transmitter to emit laser light, then receives the reflected light after it strikes an object's surface. Distance is then measured by measuring the time difference between emission and reception. Because laser beams are narrow, have short wavelengths, and offer extremely high resolution, they can capture a wide range of information, including the target's emission characteristics, distance, and speed. LiDAR is widely used in robotics, intelligent vehicles, and other fields. The radar housing, typically made of metal or plastic, protects and secures the radar equipment. A die-casting rough housing is then processed into a finished product using CNC machining.

[0003] Radar housing blanks produced through die-casting are typically irregularly shaped. During production and processing, fixtures are required to minimize displacement. Because irregularly shaped housing parts have tight tolerances and strict form and position tolerances, improper fixture design can easily lead to workpiece loosening and deformation, impacting both machining efficiency and precision. Utility Model Content

[0004] The main purpose of the utility model is to provide a CNC machining fixture for special-shaped parts, which can stably support and press parts with complex structures and few flat surfaces, thereby ensuring the stability of the position of the parts during the machining process.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a CNC machining fixture for special-shaped parts, used for clamping parts, comprising: a base plate and a support plate mounted on the base plate, the part comprising an inclined arc-shaped cover plate, the front end of the arc-shaped cover plate having a higher front end than the rear end, and a side plate extending downward at the edge of the front portion, thereby forming a shell cavity between the side plate and the arc-shaped cover plate, a horizontally outwardly extending flanging strip is formed at the lower end of the side plate, the lower surface of the flanging strip is flush with the lower end surface of the rear edge of the arc-shaped cover plate, and a plurality of outwardly extending first waste strips are connected to the edge of the flanging strip and the edge of the rear edge of the arc-shaped cover plate;

[0006] The upper surface of the support plate is provided with a plurality of profiling pads that can be correspondingly embedded in the shell cavity of the part and fit in contact with the lower surface of the arc-shaped cover plate, and a plurality of supporting pads for contacting the lower surface of the flange strip on the part, at least two cylinders are installed on the base plate and on the outside of the support plate, a movable pressure plate arranged above the profiling pad and the supporting pad is respectively connected to the piston rod of each cylinder on the lower surface, and a plurality of first pressure rods and a plurality of second pressure rods are installed on the lower surface of the movable pressure plate that can move up and down with the piston rod of the cylinder, the lower end surface of the first pressure rod connected to the movable pressure plate at the upper end is used for pressing and contacting the upper surface of the flange strip on the part, and the lower end surface of the second pressure rod connected to the movable pressure plate at the upper end is used for pressing and contacting the upper surface of the arc-shaped cover plate;

[0007] 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 is provided with at least one upper through hole corresponding to the upper processing area, and the base plate and the support plate are both provided with at least one lower through hole corresponding to the lower processing area. A plurality of second waste strips extending forward and upward are connected to the side plate, and each of the plurality of second waste 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 base plate and located in front of the support plate. A spinning cylinder for pressing and matching with the upper surface of the material head is installed on the upper surface of the support seat arranged corresponding to the material head on the part and away from the support plate.

[0008] The further improved scheme in the above technical scheme is as follows:

[0009] 1. In the above solution, some of the plurality of second pressure rods are arranged at intervals along the edge of the upper through hole, and the other part of the second pressure rods are arranged at intervals along the edge of the rear portion of the arc-shaped cover plate.

[0010] 2. In the above solution, the upper surface of the support seat close to one end of the support plate is set as an inclined surface corresponding to the lower surface of the material head.

[0011] 3. In the above solution, a pin is installed on both sides of the upper surface of the support seat close to one end of the support plate, and an area for the material head on the part to be embedded is formed between the two pins and the spinning cylinder.

[0012] 4. In the above solution, the two ends of the movable pressure plate are movably connected to the base plate through a set of mutually cooperating guide sleeves and guide pillars.

[0013] 5. In the above solution, the two guide pillars are respectively installed on the lower surfaces of both ends of the movable pressing plate, and the two guide sleeves are respectively installed on the base plate.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] The utility model discloses a CNC machining fixture for special-shaped parts, the upper surface of which is provided with a plurality of profiling pads which can be correspondingly embedded in the shell cavity of the part and fit in contact with the lower surface of the arc-shaped cover plate, and a plurality of supporting pads for contacting the lower surface of the flanging strip on the part; at least two cylinders are installed on the base plate and on the outside of the support plate; the lower surface of a movable pressure plate arranged above the profiling pad and the supporting pad is respectively connected to the piston rod of each cylinder; a plurality of first pressure rods and a plurality of second pressure rods distributed at intervals 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 surface of the first pressure rod connected to the movable pressure plate at the upper end is used for pressing and contacting the upper surface of the flanging strip on the part; the lower end surface of the second pressure rod connected to the movable pressure plate at the upper end is used for pressing and contacting 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; the lower surface of the arc-shaped cover plate has at least one lower processing area; at least one upper portion corresponding to the upper processing area is provided on the movable pressure plate The through hole, the base plate and the support plate are each provided with at least one lower through hole corresponding to the lower processing area, which can stably support and press parts with complex structures and few planes, ensure the stability of the position of the parts during the processing, and avoid local shaking of the processing area that causes the vibration of the tool to form knife marks, thereby improving the processing quality. The upper and lower processing areas of the parts can also be processed by one clamping, saving processing steps and improving processing efficiency; furthermore, a plurality of second waste strips extending forward and upward are connected to the side plate, and the plurality of second waste strips are each connected to a material head at one end away from the side plate, and a support seat is provided on the upper surface of the base plate and located at the front side of the support plate, and a support seat is provided, and a spinning cylinder for pressing and cooperating with the upper surface of the material head is installed on the upper surface of the support seat corresponding to the material head on the part away from the support plate, which can not only improve the stability of the overall position of the part by clamping and positioning the material head, but also facilitate the removal of the material head after processing and cutting, and at the same time avoid the material head from falling after being cut. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the parts processed by the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the parts after processing in the utility model;

[0018] Figure 3 This is a schematic diagram of the overall structure of the CNC machining fixture for special-shaped parts of the utility model;

[0019] Figure 4 This is a bottom view of the structure of the CNC machining fixture for special-shaped parts of the utility model;

[0020] Figure 5This is a schematic diagram of the partial structure decomposition of the CNC machining fixture of the utility model from one perspective;

[0021] Figure 6 This is a schematic diagram of the partial structure decomposition of the CNC machining fixture of the present invention from another perspective.

[0022] In the above drawings: 100, part; 101, arc-shaped cover plate; 102, side plate; 103, shell cavity; 104, flanging strip; 105, first waste strip; 106, second waste strip; 107, material head; 1, base plate; 2, support plate; 31, contoured pad; 32, support pad; 4, cylinder; 41, support block; 5, movable pressure plate; 51, guide sleeve; 52, guide column; 61, first pressure rod; 62, second pressure rod; 7, support seat; 8, spinning cylinder; 9, pin; 10, upper through hole; 11, lower through hole. DETAILED DESCRIPTION

[0023] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0024] Example 1: A CNC machining fixture for special-shaped parts, used for clamping a part 100, comprising: a base plate 1 and a support plate 2 mounted on the base plate 1, the part 100 comprising an inclined arc-shaped cover plate 101, the front end of the arc-shaped cover plate 101 being higher than the rear end, and having a downwardly extending side plate 102 at the front edge thereof, thereby forming a shell cavity 103 between the side plate 102 and the arc-shaped cover plate 101, the lower end of the side plate 102 being formed with a horizontally outwardly extending flanging strip 104, the lower surface of the flanging strip 104 being flush with the lower end surface of the rear edge of the arc-shaped cover plate 101, the edges of the flanging strip 104 and the rear edge of the arc-shaped cover plate 101 being connected to a plurality of outwardly extending first waste strips 105;

[0025] The upper surface of the support plate 2 is provided with a plurality of contour pads 31 which can be correspondingly embedded in the shell cavity 103 of the part 100 and fit in contact with the lower surface of the arc-shaped cover plate 101, and a plurality of support pads 32 for contacting the lower surface of the flanging strip 104 on the part 100. At least two cylinders 4 are installed on the base plate 1 and on the outside of the support plate 2. The lower surface of a movable pressure plate 5 arranged above the contour pad 31 and the support pad 32 is respectively connected to the piston rod of each cylinder 4. A plurality of first pressure rods 61 and a plurality of second pressure rods 62 distributed at intervals are installed on the lower surface of the movable pressure plate 5 which can move up and down with the piston rod of the cylinder 4. The lower end surface of the first pressure rod 61 connected to the movable pressure plate 5 at the upper end is used for pressing and contacting the upper surface of the flanging strip 104 on the part 100, and the lower end surface of the second pressure rod 62 connected to the movable pressure plate 5 at the upper end is used for pressing and contacting the upper surface of the arc-shaped cover plate 101;

[0026] 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, and the base plate 1 and the support plate 2 are both 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 second waste strips 106 extending forward and upward, and each of the plurality of second waste strips 106 is connected to a material head 107 at one end away from the side plate 102. A support seat 7 is provided on the upper surface of the base plate 1 and located in front of the support plate 2. The upper surface of the support seat 7 corresponding to the material head 107 on the part 100 is installed away from the upper surface of the support plate 2 with a spinning cylinder 8 for pressing and matching with the upper surface of the material head 107.

[0027] The upper surface of the support seat 7 close to one end of the support plate 2 is configured as an inclined surface corresponding to the lower surface of the material head 107;

[0028] A pin 9 is installed on both sides of the upper surface of the support seat 7 near one end of the support plate 2, and an area for the material head 107 on the part 100 to be embedded is formed between the two pins 9 and the spinning cylinder 8.

[0029] Example 2: A CNC machining fixture for special-shaped parts, used for clamping a part 100, comprising: a base plate 1 and a support plate 2 mounted on the base plate 1, the part 100 comprising an inclined arc-shaped cover plate 101, the front end of the arc-shaped cover plate 101 having a higher front end than the rear end, and a downwardly extending side plate 102 at the front edge thereof, thereby forming a shell cavity 103 between the side plate 102 and the arc-shaped cover plate 101, the lower end of the side plate 102 being formed with a horizontally outwardly extending flanging strip 104, the lower surface of the flanging strip 104 being flush with the lower end surface of the rear edge of the arc-shaped cover plate 101, the edges of the flanging strip 104 and the rear edge of the arc-shaped cover plate 101 being connected to a plurality of outwardly extending first waste strips 105;

[0030] The upper surface of the support plate 2 is provided with a plurality of contour pads 31 which can be correspondingly embedded in the shell cavity 103 of the part 100 and fit in contact with the lower surface of the arc-shaped cover plate 101, and a plurality of support pads 32 for contacting the lower surface of the flanging strip 104 on the part 100. At least two cylinders 4 are installed on the base plate 1 and on the outside of the support plate 2. The lower surface of a movable pressure plate 5 arranged above the contour pad 31 and the support pad 32 is respectively connected to the piston rod of each cylinder 4. A plurality of first pressure rods 61 and a plurality of second pressure rods 62 distributed at intervals are installed on the lower surface of the movable pressure plate 5 which can move up and down with the piston rod of the cylinder 4. The lower end surface of the first pressure rod 61 connected to the movable pressure plate 5 at the upper end is used for pressing and contacting the upper surface of the flanging strip 104 on the part 100, and the lower end surface of the second pressure rod 62 connected to the movable pressure plate 5 at the upper end is used for pressing and contacting the upper surface of the arc-shaped cover plate 101;

[0031] 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, and the base plate 1 and the support plate 2 are both 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 second waste strips 106 extending forward and upward, and each of the plurality of second waste strips 106 is connected to a material head 107 at one end away from the side plate 102. A support seat 7 is provided on the upper surface of the base plate 1 and located in front of the support plate 2. The support seat 7 corresponding to the material head 107 on the part 100 is installed on the upper surface of the end away from the support plate 2 with a spinning cylinder 8 for pressing and matching with the upper surface of the material head 107. The spinning cylinder 8 is purchased from outside and belongs to the scope of the prior art and will not be described here.

[0032] Some of the second pressure rods 62 are spaced apart along the edge of the upper through hole 10 , and the other second pressure rods 62 are spaced apart along the edge of the rear portion of the arc-shaped cover plate 101 .

[0033] The integrally formed part 100 is a die-cast housing of the laser radar; the piston rods of the four cylinders 4 are respectively connected to the four corners of the movable pressure plate 5; each of the cylinders 4 is mounted on the upper surface of the base plate 1 via a support block 41;

[0034] The two ends of the movable pressure plate 5 are movably connected to the base plate 1 through a set of mutually cooperating guide sleeves 51 and guide pillars 52; the two guide pillars 52 are respectively installed on the lower surface of the two ends of the movable pressure plate 5, and the two guide sleeves 51 are respectively installed on the base plate 1.

[0035] The CNC machining fixture for special-shaped parts of the present invention can stably support and press parts with complex structures and few flat surfaces, ensure the stability of the position of the parts during the machining process, avoid local vibration in the machining area that causes the tool to vibrate and form knife marks, improve the machining quality, and can also achieve machining of the upper and lower machining areas of the parts through one clamping, saving machining steps and improving machining efficiency; further, it can improve the stability of the overall position of the parts by clamping and positioning the material head, and facilitate the removal of the material head after machining and cutting, while avoiding the material head falling after being cut.

[0036] Working principle:

[0037] When in use, first place the support plate that can rotate with the substrate in a state where the upper surface is horizontal and facing upward, and at the same time, place the piston rod of the cylinder in an extended state so that the movable pressure plate that moves up and down is away from the support plate, and at the same time, place the spinning cylinder on the support seat in a non-pressing state;

[0038] Next, the part to be processed is mounted on the profiling pad and the supporting pad so that the lower surface of the flange strip on the part is in contact with the upper surface of the supporting pad, and the lower surface of the arc-shaped cover plate on the part is in contact with each profiling pad, thereby achieving support and position limiting for the part.

[0039] At the same time, the lower surface of the parts loading head is in contact with the upper surface of the support base near one end of the support plate and is set in the area surrounded by the two pins and the spinning cylinder;

[0040] Next, the piston rod of the cylinder drives the movable pressure plate to move toward the part until the first and second pressure rods of different lengths respectively come into contact with the surface of the part. At the same time, the spinning cylinder switches to the pressing state, and the pressure block on it rotates to the top of the material head and presses it down.

[0041] By moving the spindle cutter head on the CNC machine and coordinating with the rotation of the base plate, milling is performed on both sides of the clamped part, removing 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 processing areas on the upper and lower sides of the part.

[0042] In the above-mentioned process of processing both sides of the part, the parts with complex structures and few flat surfaces can be stably supported and pressed, ensuring the stability of the position of the parts during the entire process of double-sided processing. It can also avoid the situation where local vibration in the processing area causes the tool to vibrate and form knife marks, thereby improving the processing quality.

[0043] For the material head connected to the part through the second waste strip, the stability of the overall position of the part can be improved by clamping and positioning the material head during the processing, and the rotation of the spinning cylinder can be used to facilitate the removal of the material head after processing, while preventing the material head from falling after being cut.

[0044] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A CNC machining fixture for special-shaped parts, used for clamping a part (100), comprising: A base plate (1) and a support plate (2) mounted on the base plate (1), characterized in that: the part (100) includes an inclined arc-shaped cover plate (101), the front end of the arc-shaped cover plate (101) being higher than the rear end, and a side plate (102) extending downward is provided at the front edge of the arc-shaped cover plate (101), so that a shell cavity (103) is enclosed between the side plate (102) and the arc-shaped cover plate (101), the lower end of the side plate (102) is formed with a horizontally outwardly extending flange strip (104), the lower surface of the flange strip (104) is flush with the lower end surface of the rear edge of the arc-shaped cover plate (101), and the edge of the flange strip (104) and the edge of the rear edge of the arc-shaped cover plate (101) are both connected with a plurality of outwardly extending first waste strips (105); The upper surface of the support plate (2) is provided with a plurality of profiling pads (31) which can be correspondingly embedded in the shell cavity (103) of the part (100) and in contact with the lower surface of the arc-shaped cover plate (101), and a plurality of supporting pads (32) for contacting the lower surface of the flange strip (104) on the part (100). At least two cylinders (4) are installed on the base plate (1) and located outside the support plate (2). The lower surface of a movable pressure plate (5) provided above the profiling pads (31) and the supporting pads (32) is respectively in contact with each cylinder. The piston rod of the cylinder (4) is connected, and a plurality of first pressure rods (61) and a plurality of second pressure rods (62) are installed on the lower surface of the movable pressure plate (5) which can move up and down with the piston rod of the cylinder (4). The lower end surface of the first pressure rod (61) whose upper end is connected to the movable pressure plate (5) is used for pressing and contacting with the upper surface of the flange strip (104) on the part (100), and the lower end surface of the second pressure rod (62) whose upper end is connected to the movable pressure plate (5) is used for pressing and contacting with the upper surface of the arc 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 base plate (1) and the support plate (2) are both 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 second waste strips (106) extending forward and upward, and each of the plurality of second waste strips (106) is connected to a material head (107) at one end away from the side plate (102). A support seat (7) is provided on the upper surface of the base plate (1) and located in front of the support plate (2). The support seat (7) corresponding to the material head (107) on the part (100) is provided with a spinning cylinder (8) on the upper surface of the end away from the support plate (2) for pressing and matching with the upper surface of the material head (107).

2. The CNC machining fixture for special-shaped parts according to claim 1, characterized in that: Among the plurality of second pressure rods (62), a portion of the second pressure rods (62) are arranged at intervals along the edge of the upper through hole (10), and another portion of the second pressure rods (62) are arranged at intervals along the edge of the rear portion of the arc-shaped cover plate (101).

3. The CNC machining fixture for special-shaped parts according to claim 1 or 2, characterized in that: The upper surface of the support seat (7) close to one end of the support plate (2) is configured as an inclined surface corresponding to the lower surface of the material head (107).

4. The CNC machining fixture for special-shaped parts according to claim 3, characterized in that: A pin (9) is installed on both sides of the upper surface of the support seat (7) close to one end of the support plate (2), and an area for the material head (107) on the part (100) to be embedded is formed between the two pins (9) and the spinning cylinder (8).

5. The CNC machining fixture for special-shaped parts according to claim 1, characterized in that: The two ends of the movable pressing plate (5) are movably connected to the base plate (1) via a set of mutually matching guide sleeves (51) and guide pillars (52).

6. The CNC machining fixture for special-shaped parts according to claim 5, characterized in that: The two guide pillars (52) are respectively mounted on the lower surfaces of both ends of the movable pressing plate (5), and the two guide sleeves (51) are respectively mounted on the base plate (1).

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