Fastener eccentric sampling device

Abstract

The utility model belongs to the field of fastener detection, and particularly relates to a fastener eccentric sampling device which comprises a lathe and an eccentric clamp, the lathe comprises a main shaft, a double-shaft translation driving mechanism and a turning tool, and the double-shaft translation driving mechanism is used for driving the turning tool to move in a rectangular coordinate system; the eccentric clamp is connected with the main shaft, the clamping center deviates from the axis of the main shaft, the fastener is fixed through the eccentric clamp, the lathe is started to enable the main shaft to drive the fastener to eccentrically rotate, then the double-shaft translation driving mechanism drives the turning tool to gradually get close to the fastener and move according to the set feeding amount, and the outer layer of the fastener is gradually turned off. Compared with an existing device for carrying out linear cutting and turning sampling, the device has the advantages that the speed is higher, the overall detection efficiency is improved, and different from existing turning equipment, the device can directly obtain the eccentric sample.

Description

Technical Field

[0001] The utility model belongs to the field of fastener detection, and particularly relates to an eccentric sampling device for fasteners. Background Art

[0002] When conducting performance tests on fasteners, it is necessary to take eccentric samples of the samples to test the mechanical properties of related products. Most of the current sampling devices use wire cutting to take eccentric samples of fasteners, which results in a relatively long sampling process time, making the entire testing process time longer. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an eccentric sampling device for fasteners, which shortens the eccentric sampling time and improves the testing efficiency.

[0004] The utility model provides an eccentric sampling device for fasteners, including:

[0005] A lathe, which includes a main shaft, a double-axis translation drive mechanism and a turning tool, and the double-axis translation drive mechanism is used to drive the turning tool to move in a rectangular coordinate system; and

[0006] An eccentric fixture connected to the main shaft and with the clamping center deviating from the axis of the main shaft.

[0007] Optionally, the lathe further includes a tool rest base and a turret tool rest arranged on the tool rest base, the double-axis translation drive mechanism is drivingly connected to the tool rest base, and various types of turning tools are installed on the turret tool rest.

[0008] Optionally, the double-axis translation drive mechanism includes a first linear reciprocating drive mechanism and a second linear reciprocating drive mechanism. The second linear reciprocating drive mechanism includes a support plate drivingly connected to the first linear reciprocating drive mechanism, a second lead screw rotatably arranged on the support plate, and a second motor fixedly arranged on the support plate. The second lead screw is in transmission connection with the tool rest base, and the support plate is in embedded sliding connection with the tool rest base.

[0009] Optionally, the driving direction of the second linear reciprocating drive mechanism is perpendicular to the axis of the main shaft.

[0010] Optionally, the first linear reciprocating drive mechanism includes a guide table and a linear driver arranged on the side of the guide table. The top of the guide table is slidably connected to the support plate, the linear driver is connected to the support plate, and the driving direction of the linear driver is parallel to the axis of the main shaft.

[0011] Optionally, the support plate has an I-shaped structure, and both ends of the support plate are slidably connected to the guide table.

[0012] Optionally, the linear driver includes a first motor and a first lead screw, and the first lead screw is in transmission connection with the support plate; or

[0013] The linear actuator is an electric cylinder.

[0014] Optionally, the eccentric fixture includes a columnar body, and an eccentric hole and a threaded hole are respectively formed in the end portion and the side wall of the columnar body. The threaded hole penetrates through to the eccentric hole, and a fastening bolt is screwed in the threaded hole.

[0015] Optionally, the eccentric hole is a circular hole, a missing circular hole or a polygonal hole.

[0016] Optionally, the threaded hole is located on the thin wall side of the columnar body.

[0017] The beneficial effect of the present utility model is that a fastener (such as a bolt or a screw sleeve) is fixed by an eccentric fixture, the lathe is started to drive the fastener to rotate eccentrically by the main shaft, then the biaxial translation drive mechanism drives the turning tool to gradually approach the fastener and move at a set feed amount, and the outer layer of the fastener is gradually turned off to obtain a target eccentric sample, which can be taken for detection. Compared with the existing device for wire cutting, the turning sampling speed is faster, thereby improving the overall detection efficiency. Different from the existing turning equipment, this device can directly obtain an eccentric sample. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a fastener eccentric sampling device provided by the present utility model;

[0019] Figure 2 is Figure 1 an enlarged view of A in

[0020] Figure 3 is a schematic structural diagram of an eccentric fixture provided by the present utility model;

[0021] Figure 4 is a schematic structural diagram of an eccentric fixture provided by the present utility model;

[0022] Figure 5 is a schematic structural diagram of an eccentric fixture provided by the present utility model;

[0023] Figure 6 is a schematic structural diagram of an eccentric fixture provided by the present utility model;

[0024] Figure 7 is a schematic structural diagram of an eccentric fixture provided by the present utility model.

[0025] In the figure: 100, lathe; 11, main shaft; 121, guide table; 122, linear actuator; 1222, first lead screw; 123, carriage; 124, second lead screw; 125, second motor; 13, turning tool; 14, tool rest base; 15, turret tool rest; 200, eccentric fixture; 21, columnar body; 211, eccentric hole; 22, fastening bolt. Detailed implementation mode

[0026] As Figure 1 and 2 shown, a fastener eccentric sampling device provided by the present utility model includes: a lathe 100 and an eccentric fixture 200. Among them, the lathe 100 includes a main shaft 11, a biaxial translation driving mechanism, and a turning tool 13. The biaxial translation driving mechanism is used to drive the turning tool 13 to move in a rectangular coordinate system; the eccentric fixture 200 is connected to the main shaft 11 and the clamping center deviates from the axis of the main shaft 11.

[0027] Compared with the prior art, when the fastener eccentric sampling device provided by the present utility model is in use, a fastener (such as a bolt or a bushing) is fixed by the eccentric fixture 200, the lathe 100 is started to drive the fastener to rotate eccentrically by the main shaft 11, and then the biaxial translation driving mechanism drives the turning tool 13 to gradually approach the fastener and move at a set feed amount, gradually turning off the outer layer of the fastener to obtain a target eccentric sample, which can be taken for detection. Compared with the existing device for wire cutting, the speed of turning sampling is faster, thereby improving the overall detection efficiency. And different from the existing turning equipment, this device can directly obtain eccentric samples.

[0028] In one embodiment, the lathe 100 further includes a tool rest base 14 and a turret tool rest 15 arranged on the tool rest base 14. The biaxial translation driving mechanism is drivingly connected to the tool rest base 14, and various types of turning tools 13 are installed on the turret tool rest 15. Specifically, the turret tool rest 15 can be rotationally adjusted to use a suitable type of turning tool 13, and of course, the time required to replace the turning tool 13 can also be reduced.

[0029] In this embodiment, the biaxial translation driving mechanism includes a first linear reciprocating driving mechanism and a second linear reciprocating driving mechanism. The first linear reciprocating driving mechanism includes a guiding platform 121 and a linear driver 122 arranged on the side of the guiding platform 121. The top of the guiding platform 121 is slidably connected to a supporting plate 123. The linear driver 122 is connected to the supporting plate 123, and the driving direction of the linear driver 122 is parallel to the axis of the main shaft 11. The second linear reciprocating driving mechanism includes a supporting plate 123 drivingly connected to the first linear reciprocating driving mechanism, a second lead screw 124 rotatably arranged on the supporting plate 123, and a second motor 125 fixedly arranged on the supporting plate 123. The second lead screw 124 is in transmission connection with the tool rest base 14, and the supporting plate 123 is in embedded sliding connection with the tool rest base 14 to prevent the tool rest base 14 from accidentally disengaging from the supporting plate 123. The driving direction of the second linear reciprocating driving mechanism is perpendicular to the axis of the main shaft 11.

[0030] Specifically, the linear driver 122 drives the pallet 123 to slide along the guiding platform 121 to control the axial distance between the turning tool 13 and the fastener, so as to achieve the purpose of controlling the sampling length. The second motor 125 starts to drive the second lead screw 124 to drive the tool rest base 14 to control the radial distance between the turning tool 13 and the fastener, so as to achieve the purpose of controlling the sampling cross-sectional area. It should be noted that the cross-sectional shape of the sample is oval.

[0031] In another embodiment, the driving directions of the first linear reciprocating driving mechanism and the second linear reciprocating driving mechanism are swapped, and the functions achieved are also swapped accordingly.

[0032] In one embodiment, the linear driver 122 includes a first motor and a first lead screw 1222. The first lead screw 1222 is in transmission connection with the pallet 123. The first motor is inside the lathe 100 and is not shown in the figure; alternatively, the linear driver 122 is an electric cylinder. The first motor and the second motor 125 are servo motors or stepper motors.

[0033] In one embodiment, the pallet 123 has an I-shaped structure, and both ends of the pallet 123 are slidably connected to the guiding platform 121. Specifically, there are two parallel sliding rails at the top of the guiding platform 121 for slidably connecting with both ends of the pallet 123. Both ends of the pallet 123 extend to both sides, which can prevent the iron chips cut off from falling onto the sliding rails where the pallet 123 and the guiding platform 121 cooperate. At the same time, the cooperation area between the pallet 123 and the guiding platform 121 is increased, making the whole second linear reciprocating driving mechanism more stable.

[0034] In one embodiment, please refer to Figure 2 , the eccentric clamp 200 includes a columnar body 21. An eccentric hole 211 and a threaded hole are respectively formed at the end and the side wall of the columnar body 21. The threaded hole penetrates through to the eccentric hole 211, and a fastening bolt 22 is screwed in the threaded hole. Since the threaded hole is covered by the fastening bolt 22, it is not shown in the figure. Specifically, the fastener is placed in the eccentric hole 211, and the fastener is clamped and fixed by tightening the fastening bolt 22. The axis line of the fastener deviates from the axis line of the columnar body 21 by a certain distance.

[0035] In one embodiment, please refer to Figures 3 - 7 , the eccentric hole 211 is a round hole, a missing round hole or a polygonal hole. The polygonal hole includes but is not limited to an isosceles triangle hole, a pentagon hole or a regular hexagon hole. Preferably, the eccentric hole 211 is a round hole.

[0036] In one embodiment, the threaded hole is located on the thin-wall side of the columnar body 21, which can balance the center of gravity of the eccentric clamp 200 and is relatively close to the center of the structure.

[0037] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present application is limited to these examples; under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of one or more embodiments of the present application as described above, and they are not provided in detail for the sake of brevity.

[0038] One or more embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. A fastener eccentric sampling device, characterized in that: include: A lathe (100), the lathe (100) comprising a spindle (11), a dual-axis translation drive mechanism and a turning tool (13), the dual-axis translation drive mechanism being used to drive the turning tool (13) to move in a rectangular coordinate system; and An eccentric clamp (200) is connected to the main shaft (11) and has a clamping center offset from the axis of the main shaft (11).

2. The fastener eccentric sampling device according to claim 1, characterized in that: The lathe (100) further comprises a tool holder base (14) and a turret tool holder (15) disposed on the tool holder base (14); the dual-axis translation drive mechanism is drivingly connected to the tool holder base (14); and turning tools (13) of various models are mounted on the turret tool holder (15).

3. The fastener eccentric sampling device according to claim 2, characterized in that: The dual-axis translation drive mechanism comprises a first linear reciprocating drive mechanism and a second linear reciprocating drive mechanism, wherein the second linear reciprocating drive mechanism comprises a support plate (123) drivingly connected to the first linear reciprocating drive mechanism, a second lead screw (124) rotatably disposed on the support plate (123), and a second motor (125) fixedly disposed on the support plate (123), wherein the second lead screw (124) is drivingly connected to the tool holder base (14), and the support plate (123) is embeddedly slidably connected to the tool holder base (14).

4. The fastener eccentric sampling device according to claim 3, characterized in that: The driving direction of the second linear reciprocating driving mechanism is perpendicular to the axis of the main shaft (11).

5. The fastener eccentric sampling device according to claim 3, characterized in that: The linear reciprocating drive mechanism 1 comprises a guide platform (121) and a linear driver (122) arranged on the side of the guide platform (121); the top of the guide platform (121) is slidably connected to a support plate (123); the linear driver (122) is connected to the support plate (123); and the driving direction of the linear driver (122) is parallel to the axis of the main shaft (11).

6. The fastener eccentric sampling device according to claim 5, characterized in that: The support plate (123) is in an I-shaped structure, and both ends of the support plate (123) are slidably connected to the guide platform (121).

7. The fastener eccentric sampling device according to claim 5, characterized in that: The linear drive (122) comprises a motor 1 and a lead screw 1 (1222), and the lead screw 1 (1222) is drivingly connected to the support plate (123); or The linear drive (122) is an electric cylinder.

8. The fastener eccentric sampling device according to any one of claims 1 to 7, characterized in that: The eccentric clamp (200) comprises a columnar body (21), the end and side wall of the columnar body (21) are respectively provided with an eccentric hole (211) and a screw hole, the screw hole penetrates the eccentric hole (211), and a fastening bolt (22) is screwed into the screw hole.

9. The fastener eccentric sampling device according to claim 8, characterized in that: The eccentric hole (211) is a circular hole, a partially circular hole or a polygonal hole.

10. The fastener eccentric sampling device according to claim 8, characterized in that: The screw hole is located on the thin-wall side of the columnar body (21).

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