Clamping chuck and milling process

Abstract

According to the technical scheme, the clamping chuck is characterized by comprising a base, a driving cavity is formed in the base, a plurality of sliding grooves are formed in the bottom end of the base, the sliding grooves communicate with the driving cavity, the sliding grooves are gradually away from the axis of the base in the vertical direction, and clamping jaws are slidably connected into the sliding grooves; a supporting frame is fixedly connected to the top face of the base, a plurality of air holes corresponding to the clamping jaws are formed in the top end of the supporting frame, and detection holes communicated with the air holes are formed in the base. The air holes are communicated with the detection holes, the detection holes are externally connected with the air tightness detector, the air tightness at the air holes can be judged through inflation and pressure detection, during clamping, air tightness detection is conducted on the air holes through the detection holes, and when a workpiece is accurately clamped, the workpiece needs to cover all the air holes, so that whether the workpiece is correctly clamped or not is judged; automatic detection is achieved, the rejection rate is reduced, invalid working time is shortened, and production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of milling processing, and more specifically, to a clamping chuck and a milling process. Background Art

[0002] Milling is a common mechanical processing method. Milling is suitable for processing planes, grooves, various forming surfaces and special surfaces of molds, etc. Different milling tools and different milling methods can be used for different processing requirements of different workpieces. When processing the movable and static disks, it is necessary to use milling tools to process the surfaces of the movable and static disks. The existing processing method is generally to fix the workpiece to be processed by a clamping chuck, and then use a vertical milling tool to process the inner wall of the workpiece. However, in the clamping process, problems such as improper placement may occur, resulting in inaccurate clamping or unstable clamping. In this case, milling processing will not only lead to an increase in the scrap rate, but also generate invalid working time, affecting production efficiency.

[0003] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a clamping chuck and a milling process.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a clamping chuck, comprising a base, a driving cavity is opened inside the base, an inlet and an outlet are opened on the base, the inlet and the outlet are connected with the driving cavity, a plurality of slide grooves are opened at the bottom end of the base, the slide grooves are connected with the driving cavity, the slide grooves gradually move away from the axis of the base along the vertical upward direction, a claw is slidably connected in the slide groove, a support frame is fixedly connected to the top surface of the base, a plurality of air holes corresponding to the claws are opened on the top of the support frame, and a detection hole connected with the air hole is provided on the base.

[0006] The present invention is further configured as follows: a first detection flow channel is opened in the base, the detection hole is connected to the first detection flow channel, a plurality of second detection flow channels corresponding to the detection holes are opened in the support frame, the second detection flow channels connect the corresponding air holes with the first detection flow channels, and the support frame is detachably connected to the base.

[0007] The present invention is further configured as follows: a first inspection hole is opened on the side wall of the base, the first inspection hole is connected to the first detection channel, and a plurality of second inspection holes connected to the second detection channel are opened on the side wall of the support frame.

[0008] The present invention is further configured as follows: the clamping claw comprises a slider, a connecting block and a fixing claw, the slider is slidably connected in the slide groove, the bottom end of the slider is located in the driving cavity, and the connecting block is detachably connected to the fixing claw.

[0009] The present invention is further configured as follows: a notch is provided at the bottom end of the side wall of the sliding block, and the notch is communicated with the driving cavity.

[0010] The present invention is further configured as follows: the slot includes an inner slot and an outer slot, the inner slot is located on the side of the slider close to the axis of the base, the outer slot is located on the other side of the slider, and a plurality of guide slots are provided on the bottom surface of the driving cavity. When the bottom surface of the slider is in contact with the bottom surface of the guide slot, the outer slot is connected to the driving cavity through the guide slot.

[0011] The present invention is further configured such that: the height of the base is less than 110 mm.

[0012] A milling process, using the above-mentioned clamping chuck, comprises the following steps: S1, flow channel inspection, plugging of pores, inspecting the first inspection flow channel and the second inspection flow channel through the first inspection hole and the second inspection flow channel hole to ensure that the first inspection flow channel and the second inspection flow channel are unobstructed, and then the plugging of the pores is completed; S2, clamping, pumping fluid into the driving chamber through the inlet, applying pressure to the bottom of the clamping jaw, lifting the clamping jaw obliquely upward, placing the workpiece on the support frame, and then pumping the fluid in the driving chamber out through the outlet to generate negative pressure, applying tension to the bottom of the clamping jaw, and the clamping jaw presses the workpiece on the support frame; S3, testing air tightness, testing the air tightness of the pores through the testing holes and the first testing channel and the second testing channel. If the air tightness is insufficient, return to S2; if the air tightness meets the requirements, proceed to the next step; S4, milling, milling the workpiece from above with a milling cutter; S5, unloading, pump fluid into the driving chamber through the inlet, apply pressure to the bottom of the clamping jaw, push the clamping jaw upward obliquely, and then push the workpiece out.

[0013] The present invention is further configured as follows: in said S4, a plurality of chip dividing grooves are provided on the outer edge of the milling cutter, and the chip dividing grooves are arranged in a linear array in the axial direction of the milling cutter.

[0014] The present invention is further configured as follows: in S5, before releasing the clamping claws, the air tightness at the pores is detected through the detection hole and the first detection channel and the second detection channel. If the air tightness is insufficient, the ejected workpiece is quality inspected.

[0015] In summary, the present invention has the following beneficial effects: the air hole is connected to the detection hole, and the detection hole is externally connected to an air tightness detector, so that the air tightness at the air hole can be judged by inflation and pressure detection. When clamping, the air tightness is detected at the air hole through the detection hole. When the workpiece is accurately clamped, the workpiece should cover all the air holes, so as to judge whether the workpiece is clamped correctly, realize automatic detection, reduce the scrap rate, and at the same time reduce the ineffective working time and improve the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional view of the first embodiment of the present invention Figure 1 ; Figure 2 A cross-sectional view of the first embodiment of the present invention Figure 2 ; Figure 3 A cross-sectional view of the first embodiment of the present invention Figure 3 ; Figure 4 It is a structural schematic diagram of the base in the present invention; Figure 5 This is a flowchart of Embodiment 2 of the present invention.

[0017] In the figure: 1. base; 2. drive chamber; 3. inlet; 4. outlet; 5. slide; 6. support frame; 7. air hole; 8. detection hole; 9. first detection channel; 10. second detection channel; 11. first row of inspection holes; 12. second row of inspection holes; 13. slider; 14. connecting block; 15. fixing claw; 16. inner groove; 17. outer groove; 18. guide groove; 19. milling cutter; 20. chip dividing groove. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Embodiment 1: A clamping chuck, such as Figure 1-Figure 4 As shown, it includes a base 1, a driving cavity 2 is opened inside the base 1, an inlet 3 and an outlet 4 are opened on the base 1, the inlet 3 and the outlet 4 are both connected with the driving cavity 2, a plurality of slide grooves 5 are opened at the bottom end of the base 1, the slide grooves 5 are connected with the driving cavity 2, the slide grooves 5 gradually move away from the axis of the base 1 along the vertical upward direction, a claw is slidably connected in the slide groove 5, a support frame 6 is fixedly connected to the top surface of the base 1, a plurality of air holes 7 corresponding to the claws are opened on the top of the support frame 6, and a detection hole 8 connected with the air hole 7 is provided on the base 1.

[0020] Specifically, the base 1 is composed of a quadrangular prism and a cylinder, the driving chamber 2 is located in the cylinder, the inlet 3, the outlet 4 and the detection hole 8 are all located on the quadrangular prism, the inlet 3 and the outlet 4 are respectively connected to a pump body, the cross section of the slide 5 is circular, when the claw slides upward along the slide 5, the top of the claw moves away from the axis of the cylinder, so as to place the workpiece on the supporting feet between the claws. In this embodiment, there are three claws in total. When the claw slides downward along the slide 5, the force provided by the claw during oblique pulling can be regarded as A downward vertical component force and a horizontal component force toward the axis of the cylinder ensure the stability of clamping. The air hole 7 is connected to the detection hole 8. The detection hole 8 is externally connected to an air tightness detector. The air tightness at the air hole 7 can be judged by inflation and pressure detection. When clamping, the air tightness at the air hole 7 is tested through the detection hole 8. When the workpiece is accurately clamped, the workpiece should cover all the air holes 7. This is used to judge whether the workpiece is clamped correctly, realize automatic detection, reduce the scrap rate, and at the same time reduce invalid working time and improve production efficiency.

[0021] like Figure 1-Figure 4 As shown, a first detection channel 9 is opened in the base 1, and the detection hole 8 is connected to the first detection channel 9. A plurality of second detection channels 10 corresponding to the detection holes 8 are opened in the support frame 6, and the second detection channel 10 connects the corresponding air holes 7 with the first detection channel 9. The support frame 6 is detachably connected to the base 1, and a first inspection hole 11 is opened on the side wall of the base 1, and the first inspection hole 11 is connected to the first detection channel 9. A plurality of second inspection holes 12 connected to the second detection channel 10 are opened on the side wall of the support frame 6.

[0022] Specifically, the first detection flow channel 9 starts from the detection hole 8, and the first detection flow channel 9 is L-shaped in the quadrangular prism. Then, the first detection flow channel 9 goes vertically upward along the side wall of the cylinder, and then turns 90° to extend horizontally to the axis of the cylinder. The three second detection flow channels 10 are arranged in a circular array around the axis of the cylinder and are connected to the first detection flow channel 9 at the axis of the cylinder. The support frame 6 is detachably connected to the base 1 by bolts. Because the support frame 6 requires more external force, the flow channel in the support frame 6 is more prone to failure than the flow channel in the base 1. The detachable structure between the support frame 6 and the base 1 is used to realize the separate disassembly, replacement or maintenance of the support frame 6. To reduce downtime in case of a fault, any second inspection hole 12 is connected to a second detection flow channel 10, the horizontal part of the first detection flow channel 9 located in the cylinder is coaxially arranged with the first inspection hole 11, and the first inspection hole 11 and the second inspection hole 12 are externally connected to an air pump. When a fault occurs, gas can be pumped into each second inspection hole 12 one by one and the pressure value change is observed through an air tightness tester to determine in which second inspection flow channel 10 the fault is specifically located. When no problem is found in the second inspection flow channel 10, gas is pumped into the first inspection hole 11 and the pressure value change is observed through an air tightness tester to determine whether the fault is located below the first inspection hole 11.

[0023] like Figure 1-Figure 4 As shown, the claw includes a slider 13, a connecting block 14 and a fixed claw 15. The slider 13 is slidably connected in the slide groove 5. The bottom end of the slider 13 is located in the driving cavity 2. The connecting block 14 and the fixed claw 15 are detachably connected. A notch is provided at the bottom end of the side wall of the slider 13, and the notch is connected to the driving cavity 2. The notch includes an inner groove 16 and an outer groove 17. The inner groove 16 is located on the side of the slider 13 close to the axis of the base 1, and the outer groove 17 is located on the other side of the slider 13. A plurality of guide grooves 18 are provided on the bottom surface of the driving cavity 2. When the bottom surface of the slider 13 fits with the bottom surface of the guide groove 18, the outer groove 17 is connected to the driving cavity 2 through the guide groove 18. The height of the base 1 is less than 110 mm.

[0024] Specifically, a ring groove for accommodating a sealing ring is provided on the side wall of the slider 13, the connecting block 14 is detachably connected to the slider 13 by bolts, and the fixing claw 15 is detachably connected to the connecting block 14 by bolts. When the fixing claw 15 needs to be replaced, the fixing claw 15 can be removed alone. When the bottom surface of the slider 13 contacts the bottom surface of the guide groove 18, the outer groove 17 and the inner groove 16 provide a force application point for the fluid in the driving chamber 2 to apply force to the slider 13, and at the same time, a force application point is added to the slider 13 in the form of a groove to avoid affecting the movement of the slider 13. The guide groove 18 The number of is consistent with the number of sliders 13, the guide groove 18 ensures that the outer groove 17 can be connected with the driving chamber 2, and ensures that the slider 13 can be evenly stressed when sliding upward, avoiding serious wear on one side of the slider 13. In this embodiment, the height of the base 1 is 101 mm. By reducing the thickness of the base 1, the volume of the driving chamber 2 is reduced, and the pressure change caused by injecting or extracting the same amount of fluid in the driving chamber 2 is increased, thereby improving the response speed of the driving chamber 2. At the same time, the space above the chuck is increased, which is convenient for placing the fixture and operating the tool.

[0025] Embodiment 2: A milling process, such as Figure 4 , Figure 5 As shown, the above-mentioned clamping chuck is applied, including the following steps: S1, flow channel inspection, plugging the pore 7, inspecting the first inspection flow channel 9 and the second inspection flow channel 10 through the first inspection hole 11 and the second inspection flow channel hole, ensuring that the first inspection flow channel 9 and the second inspection flow channel 10 are unobstructed, and then ending the plugging of the pore 7; S2, clamping, pumping fluid into the driving chamber 2 through the inlet 3, applying pressure to the bottom of the claw, lifting the claw obliquely upward, placing the workpiece on the support frame 6, and then pumping the fluid in the driving chamber 2 out through the outlet 4 to generate negative pressure, applying tension to the bottom of the claw, and the claw presses the workpiece on the support frame 6; S3, testing air tightness, testing the air tightness of the pore 7 through the testing hole 8 and the first testing channel 9 and the second testing channel 10. If the air tightness is insufficient, return to S2. If the air tightness meets the requirements, proceed to the next step; S4, milling, the workpiece is milled from above by a milling cutter 19; S5, unloading, pumping fluid into the driving chamber 2 through the inlet 3, applying pressure to the bottom of the clamping jaws, pushing the clamping jaws upward obliquely, and then ejecting the workpiece.

[0026] Specifically, the air hole 7 is blocked, the air tightness detector is started, the patency of the first detection channel 9 and the second detection channel 10 is detected through the first inspection hole 11 and the second inspection hole 12, and then the blockage is removed, and then the pump body connected to the inlet 3 is started, the slider 13 is pushed outward, and the workpiece is placed on the support frame 6, the pump body connected to the inlet 3 is closed, and the pump body connected to the outlet 4 is started, and the slider 13 is pulled down. The fixed claw 15 presses the workpiece on the support frame 6, and the air tightness detector is started to detect the air tightness at the three air holes 7. If the air tightness is insufficient, there is a clamping error, then return to S2 for clamping again. After the air tightness test is satisfied, it is determined that the clamping is correct, and the milling cutter 19 falls onto the workpiece from above to mill the inner wall of the workpiece. After the milling process is completed, the cutter is retracted, and the fixed claw 15 is pushed upward to eject the workpiece.

[0027] In S4, a plurality of chip grooves 20 are provided on the outer edge of the milling cutter 19, and the chip grooves 20 are linearly arrayed in the axial direction of the milling cutter 19. Specifically, the chip grooves 20 create a gap between the milling cutter 19 and the inner wall of the workpiece, thereby accelerating the speed of chip discharge during the milling process. At the same time, the outermost cutting edge of the milling cutter 19 is changed from a complete spiral line to a discontinuous spiral line, thereby reducing the pulling force of the rotating milling cutter 19 on the workpiece during the milling process, thereby ensuring the processing quality of the workpiece and the airtightness between the workpiece and the support frame 6.

[0028] In S5, before releasing the clamping claw, the air tightness at the air hole 7 is detected through the detection hole 8 and the first detection channel 9 and the second detection channel 10. If the air tightness is insufficient, the workpiece after ejection is quality inspected. Specifically, a secondary air tightness test is performed to avoid unexpected displacement or deformation of the workpiece during the milling process. When the air tightness does not meet the requirements, it is determined that the workpiece needs to be quality inspected to ensure the qualified rate of the final product when it is shipped.

[0029] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A clamping chuck, characterized in that: The invention comprises a base (1), wherein a driving cavity (2) is provided in the base (1), an inlet (3) and an outlet (4) are provided on the base (1), wherein the inlet (3) and the outlet (4) are both connected to the driving cavity (2), a plurality of slide grooves (5) are provided at the bottom end of the base (1), wherein the slide grooves (5) are connected to the driving cavity (2), wherein the slide grooves (5) gradually move away from the axis of the base (1) in a vertical direction upward, wherein claws are slidably connected in the slide grooves (5), a support frame (6) is fixedly connected to the top surface of the base (1), a plurality of air holes (7) corresponding to the claws are provided at the top end of the support frame (6), and a detection hole (8) connected to the air hole (7) is provided on the base (1).

2. The clamping chuck according to claim 1, characterized in that: The base (1) is provided with a first detection flow channel (9), the detection hole (8) is connected to the first detection flow channel (9), the support frame (6) is provided with a plurality of second detection flow channels (10) corresponding to the detection holes (8), the second detection flow channels (10) connect the corresponding air holes (7) with the first detection flow channels (9), and the support frame (6) is detachably connected to the base (1).

3. The clamping chuck according to claim 2, characterized in that: A first inspection hole (11) is provided on the side wall of the base (1), the first inspection hole (11) being connected to the first detection flow channel (9), and a plurality of second inspection holes (12) are provided on the side wall of the support frame (6) being connected to the second detection flow channel (10).

4. The clamping chuck according to claim 1, characterized in that: The clamping claw comprises a sliding block (13), a connecting block (14) and a fixing claw (15); the sliding block (13) is slidably connected in the sliding groove (5); the bottom end of the sliding block (13) is located in the driving cavity (2); and the connecting block (14) and the fixing claw (15) are detachably connected.

5. The clamping chuck according to claim 4, characterized in that: A notch is provided at the bottom end of the side wall of the sliding block (13), and the notch is communicated with the driving cavity (2).

6. The clamping chuck according to claim 5, characterized in that: The notch comprises an inner groove (16) and an outer groove (17), wherein the inner groove (16) is located on one side of the slider (13) close to the axis of the base (1), and the outer groove (17) is located on the other side of the slider (13). A plurality of guide grooves (18) are provided on the bottom surface of the driving cavity (2), and when the bottom surface of the slider (13) is in contact with the bottom surface of the guide grooves (18), the outer groove (17) is connected to the driving cavity (2) through the guide grooves (18).

7. The clamping chuck according to claim 1, characterized in that: The height of the base (1) is less than 110 mm.

8. A milling process, using the clamping chuck according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, flow channel inspection, plugging the pore (7), inspecting the first detection flow channel (9) and the second detection flow channel (10) through the first inspection hole (11) and the second inspection flow channel hole, ensuring that the first detection flow channel (9) and the second detection flow channel (10) are unobstructed, and then ending the plugging of the pore (7); S2, clamping, pumping fluid into the driving chamber (2) through the inlet (3), applying pressure to the bottom of the clamping jaws, lifting the clamping jaws obliquely upward, placing the workpiece on the support frame (6), and then pumping the fluid in the driving chamber (2) out through the outlet (4), generating negative pressure, applying tension to the bottom of the clamping jaws, and the clamping jaws press the workpiece onto the support frame (6); S3, testing air tightness, testing the air tightness at the air hole (7) through the testing hole (8) and the first testing channel (9) and the second testing channel (10). If the air tightness is insufficient, return to S2. If the air tightness meets the requirements, proceed to the next step. S4, milling processing, performing milling processing on the workpiece from above by using a milling cutter (19); S5, unloading, pumping fluid into the driving chamber (2) through the inlet (3), applying pressure to the bottom of the clamping jaws, pushing the clamping jaws upward obliquely, and then ejecting the workpiece.

9. The milling process according to claim 8, characterized in that: In the S4, a plurality of chip dividing grooves (20) are provided on the outer edge of the milling cutter (19), and the chip dividing grooves (20) are arranged in a linear array in the axial direction of the milling cutter (19).

10. The milling process according to claim 8, characterized in that: In S5, before releasing the clamping claw, the air tightness at the air hole (7) is detected through the detection hole (8) and the first detection channel (9) and the second detection channel (10). If the air tightness is insufficient, the workpiece after ejection is subjected to quality inspection.

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