Post-pulling chuck with airtightness detection function

Abstract

The utility model provides a backward pulling chuck with airtightness detection, which comprises a chuck body, a plurality of clamping jaws are arranged on the chuck body, a supporting seat is fixed on the clamping jaws, the supporting seat is fixedly connected with the clamping jaws through bolts, a top seat is fixed on the supporting seat, a plurality of sliding columns are arranged on the top seat in a penetrating manner, and the sliding columns are connected with the clamping jaws through bolts. An arc-shaped testing seat is fixed on the sliding column, a vent groove is formed in the arc-shaped testing seat, a vent pipe is arranged on one side of the arc-shaped testing seat in a communicating mode, the vent pipe is communicated with an air source of an external flow type air tightness detector through a hose, and a threaded sleeve is movably arranged on the top seat; by means of the clamping device, the problems that when a chuck jaw clamps, positioning of the end face of a workpiece is deviated sometimes due to human factors or the fact that a positioning face is not cleaned up, and if the deviation is not found in time, machining damage of the workpiece is caused are solved.

Description

Technical Field

[0001] This utility model relates to the field of chucks, and more particularly to a pull-back chuck with airtightness detection. Background Technology

[0002] CNC lathes are among the most widely used machining equipment today. A machining method involves pre-programming the part and inputting it into the CNC system, setting the start and stop positions before machining, clamping the part on the spindle fixture, and controlling the spindle rotation via the CNC system during machining. The cutting tool moves axially or radially across the part surface to remove excess material.

[0003] Currently, the chuck clamping methods for workpieces on CNC lathes are mainly divided into manual chucks and power chucks. Among them, the hydraulic pull-back chuck, because its jaws clamp the outer diameter of the workpiece, also has a backward pull on the workpiece.

[0004] However, for some precision parts that have very high requirements for the length between the machining surface and the positioning surface, as well as the perpendicularity between the end face of the part and the diameter, the positioning of the workpiece end face may deviate due to human factors or the positioning surface not being cleaned properly when the chuck is holding it. If this is not detected in time, it will cause machining damage to the workpiece.

[0005] Therefore, it is necessary to provide a new pull-back chuck with airtightness detection to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a pull-back chuck with airtightness detection, which solves the problem that when the chuck jaws are holding the workpiece, sometimes the workpiece end face positioning will be deviated due to human factors or the positioning surface not being cleaned properly, and if it is not detected in time, it will cause the workpiece to be damaged during processing.

[0007] The pull-back chuck with airtightness detection provided by this utility model includes a chuck body, a plurality of jaws are provided on the chuck body, a support base is fixed on the jaws, and the support base and the jaws are fixedly connected by bolts.

[0008] A top seat is fixed on the support base, and multiple sliding columns are installed through the top seat. An arc-shaped test seat is fixed on the sliding columns. A ventilation groove is opened inside the arc-shaped test seat. A ventilation pipe is connected to one side of the arc-shaped test seat. The ventilation pipe is connected to the air source of an external flow-type air tightness tester through a flexible hose.

[0009] In a preferred embodiment, the surface of the arc-shaped test seat is provided with a silicone sealing gasket.

[0010] In a preferred embodiment, a threaded sleeve is movably disposed on the top seat, and an adjusting screw is threadedly connected to the threaded sleeve. The adjusting screw is fixedly connected to one side of the arc-shaped test seat.

[0011] In a preferred embodiment, a stand is mounted on the top seat, a rotating shaft is movably mounted on the stand, and a first bevel gear is mounted at the bottom of the rotating shaft;

[0012] A second bevel gear is mounted on the threaded sleeve, and the second bevel gear meshes with the first bevel gear.

[0013] In a preferred embodiment, a hexagonal block is fixed to the top of the shaft.

[0014] In a preferred embodiment, the adjusting screw is galvanized.

[0015] The beneficial effects of this utility model are:

[0016] When this pull-back chuck is in use, when the three sets of jaws approach each other to fix the workpiece, the three arc-shaped test seats are in contact with the surface of the workpiece. At this time, the air source of the flow-type air tightness tester introduces test gas into the air pipe. If the workpiece is fixed and shifted, the arc-shaped test seats will not be in close contact with the surface of the workpiece, and gas leakage will occur. The data will be reflected in real time on the display screen of the air tightness tester, so as to facilitate the staff to judge whether the end face positioning of the workpiece is accurate.

[0017] Using a wrench to turn the hexagonal block drives the rotating shaft to rotate. Under the transmission action of the first bevel gear and the second bevel gear, the threaded sleeve will be driven to rotate. When the threaded sleeve rotates, the adjusting screw will move along the slide column. According to the size of the test workpiece, the position of the arc-shaped test seat can be changed, which improves the testing range of this pull-out chuck and makes it more flexible. Attached Figure Description

[0018] Figure 1 A perspective view of the main structure of the pull-out chuck with airtightness detection provided by this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of A shown;

[0020] Figure 3 A top view of the main structure of the pull-out chuck with airtightness detection provided by this utility model;

[0021] Figure 4 This is a schematic diagram illustrating the airtightness detection principle of the pull-back chuck with airtightness detection provided by this utility model.

[0022] The following are the labels in the diagram: 1. Chuck body; 2. Chuck claw; 3. Support base; 4. Bolt; 5. Top seat; 6. Sliding column; 7. Arc-shaped test seat; 8. Vent groove; 9. Vent pipe; 10. Silicone sealing gasket; 11. Threaded sleeve; 12. Adjusting screw; 13. Stand; 14. Rotating shaft; 15. First bevel gear; 16. Second bevel gear; 17. Hexagonal block. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please refer to the following: Figure 1 , Figure 2 , Figure 3 as well as Figure 4 ,in Figure 1 A perspective view of the main structure of the pull-out chuck with airtightness detection provided by this utility model; Figure 2 for Figure 1 A schematic diagram of the enlarged structure of A shown; Figure 3 A top view of the main structure of the pull-out chuck with airtightness detection provided by this utility model; Figure 4 This is a schematic diagram illustrating the airtightness detection principle of the pull-back chuck with airtightness detection provided by this utility model.

[0025] In the specific implementation process, such as Figures 1-4 As shown, the device includes a chuck body 1, on which multiple jaws 2 are provided. A support base 3 is fixed on each jaw 2, and the support base 3 and jaw 2 are fixedly connected by bolts 4. A top seat 5 is fixed on the support base 3, and multiple sliding columns 6 are provided through the top seat 5. An arc-shaped test seat 7 is fixed on each sliding column 6. A venting groove 8 is provided inside the arc-shaped test seat 7, and a venting pipe 9 is connected to one side of the arc-shaped test seat 7. The venting pipe 9 is connected to the air source of an external flow-type air tightness tester through a flexible hose. A silicone sealing gasket 10 is provided on the surface of the arc-shaped test seat 7. When the arc-shaped test seat 7 is in contact with the surface of the workpiece, the silicone sealing gasket 10 can ensure that the test gas will not leak. The specific working principle of this flow-type air tightness tester can be referred to the LL-25 air tightness flow monitor, which will not be elaborated here.

[0026] A threaded sleeve 11 is movably mounted on the top seat 5. An adjusting screw 12 is threadedly connected to the threaded sleeve 11. The adjusting screw 12 is galvanized to improve its service life. The adjusting screw 12 is fixedly connected to one side of the arc-shaped test seat 7. A stand 13 is mounted on the top seat 5. A rotating shaft 14 is movably mounted on the stand 13. A first bevel gear 15 is mounted at the bottom of the rotating shaft 14. A second bevel gear 16 is mounted on the threaded sleeve 11. The second bevel gear 16 meshes with the first bevel gear 15. A hexagonal block 17 is fixed at the top of the rotating shaft 14. Rotating the hexagonal block 17 with a wrench drives the rotating shaft 14 to rotate. Under the transmission action of the first bevel gear 15 and the second bevel gear 16, the threaded sleeve 11 will be driven to rotate. When the threaded sleeve 11 rotates, the adjusting screw 12 will move along the slide column 6. The position of the arc-shaped test seat 7 can be changed according to the size of the workpiece being tested, which improves the testing range of this pull-out chuck (suitable for workpieces of different sizes) and provides high flexibility.

[0027] The working principle of this utility model is as follows: When the three sets of jaws 2 are close to each other and fix the workpiece, the three arc-shaped test seats 7 are in contact with the surface of the workpiece. At this time, the air source of the flow-type air tightness tester introduces test gas into the air pipe 9. If the workpiece is fixed and deviated, the arc-shaped test seats 7 will not be in close contact with the surface of the workpiece, and gas leakage will occur. The data will be reflected in real time on the display screen of the air tightness tester, so as to facilitate the staff to judge whether the end face positioning of the workpiece is accurate.

[0028] Using a wrench to turn the hexagonal block 17 drives the rotating shaft 14 to rotate. Under the transmission action of the first bevel gear 15 and the second bevel gear 16, the threaded sleeve 11 will be driven to rotate. When the threaded sleeve 11 rotates, the adjusting screw 12 will move along the slide column 6. The position of the arc-shaped test seat 7 can be changed according to the size of the test workpiece, which improves the testing range of this pull-out chuck and makes it more flexible.

[0029] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A back pull chuck with air tightness detection, comprising a chuck body (1), characterized in that, The chuck body (1) is provided with a plurality of clamping claws (2), the clamping claws (2) are fixedly provided with support seats (3), and the support seats (3) are fixedly connected with the clamping claws (2) through bolts (4); The support seat (3) is fixedly provided with a top seat (5), a plurality of slide columns (6) are penetratingly arranged on the top seat (5), an arc-shaped test seat (7) is fixedly arranged on the slide column (6), a ventilation groove (8) is arranged in the arc-shaped test seat (7), and a ventilation pipe (9) is communicated on one side of the arc-shaped test seat (7); the ventilation pipe (9) is communicated with the gas source of the flow type air tightness detector through a hose.

2. The hermeticity tested back pull chuck of claim 1, wherein, The arc-shaped test seat (7) is provided with a silica gel sealing gasket (10) on the surface.

3. The back pull chuck with air tightness detection according to claim 2, characterized in that, A threaded sleeve (11) is movably arranged on the top seat (5), an adjusting screw rod (12) is threadedly connected on the threaded sleeve (11), and the adjusting screw rod (12) is fixedly connected with one side of the arc-shaped test seat (7).

4. The back pull chuck with air tightness detection according to claim 3, characterized in that, A vertical seat (13) is mounted on the top seat (5), a rotating shaft (14) is movably arranged on the vertical seat (13), and a first bevel gear (15) is mounted on the bottom of the rotating shaft (14); A second bevel gear (16) is mounted on the threaded sleeve (11), and the second bevel gear (16) is engaged with the first bevel gear (15).

5. The hermeticity tested back pull chuck of claim 4, wherein, A hexagonal block (17) is fixedly arranged on the top of the rotating shaft (14).

6. The hermeticity tested back pull chuck of claim 5, wherein, The adjusting screw rod (12) is subjected to galvanization treatment.

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