Automatic fixture positioning device

Abstract

The utility model relates to an automatic fixture positioning device which comprises a positioning piece, a first end of the positioning piece is used for being in contact with a part to be positioned, and a second end of the positioning piece is provided with a pressure sensor; the conduction piece is located in the positioning piece and can move relative to the positioning piece; the spring piece is clamped in a positioning groove in the inner wall of the positioning piece and separates the pressure sensor from the conduction piece; an inner concave surface and an outer convex surface are respectively formed on two sides of the spring piece; the sensing end of the pressure sensor extends into the positioning piece and is opposite to the inner concave surface; in the initial state, one end of the conduction piece extends out of the first end of the positioning piece, the other end of the conduction piece abuts against the outer convex face, and after the conduction piece makes contact with a part to be positioned, the conduction piece moves towards the second end of the positioning piece to extrude the spring piece to deform, so that the inner concave face extrudes the sensing end of the pressure sensor. According to the utility model, the problem of inaccurate part positioning caused by deformation of the pressure sensor in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fixture positioning devices, in particular to an automatic fixture positioning device. Background Art

[0002] In automated processing, fixtures are used to position and clamp parts to be processed. The fixture is generally driven by hydraulic or pneumatic means to improve the clamping efficiency. However, due to the lack of a detection mechanism, the traditional clamping device cannot confirm whether the parts are installed in place, which can easily lead to defective parts. In view of this, the fixture positioning mechanism came into being. In the prior art, most of the automatic positioning devices of the fixture directly use pressure sensors for positioning detection. When the pressure applied by the part to the pressure sensor is within the preset range, the part is considered to be clamped in place, otherwise it is considered to be not installed in place. The measurement principle of the pressure sensor is to measure the corresponding pressure through the deformation of the pressure strain gauge at the sensing end. Although the deformation of this pressure strain gauge is very small, it will cause the part to deviate from the preset positioning surface, resulting in inaccurate positioning. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides an automatic fixture positioning device, the purpose of which is to accurately determine whether a part is clamped in place while ensuring the accuracy of the part positioning member.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A fixture automatic positioning device, comprising:

[0006] A positioning member, wherein a first end of the positioning member is used to contact the part to be positioned, and a pressure sensor is provided at a second end of the positioning member;

[0007] a conductive member, which is located in the positioning member and can move relative to the positioning member;

[0008] A spring sheet is clamped in a positioning groove on the inner wall of the positioning member to separate the pressure sensor from the conductive member; an inner concave surface and an outer convex surface are formed on both sides of the spring sheet;

[0009] and, a pressure sensor, the sensing end of which extends into the positioning member and is opposite to the inner concave surface;

[0010] In the initial state, one end of the conductive member extends out of the first end of the positioning member, and the other end of the conductive member abuts against the outer convex surface. When the conductive member contacts the part to be positioned, it moves toward the second end of the positioning member, squeezing the spring sheet to deform, so that the inner concave surface squeezes the sensing end of the pressure sensor.

[0011] Further technical solutions are:

[0012] The structure of the conductive member includes a rod portion and a conductive portion. The positioning member is provided with a first cavity for accommodating the rod portion and slidingly cooperating with the rod portion, and a second cavity for accommodating the conductive portion and slidingly cooperating with the conductive portion.

[0013] The outer diameter of the conductive portion is greater than the outer diameter of the rod portion.

[0014] The positioning groove is arranged on the side wall of the second cavity.

[0015] The positioning member is fixedly arranged on the fixture device.

[0016] The pressure sensor is connected to the control module of the clamp device and transmits the pressure signal to the control module.

[0017] The positioning piece is in the shape of a hollow rod.

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model adopts the sliding cooperation between the conducting member and the positioning member, realizes the pressure transmission to the pressure sensor through the deformation of the spring sheet, and realizes the judgment of the positioning position of the part through pressure detection. The detection efficiency is high and the result is accurate. Since the positioning member is fixedly arranged, the first end face is fixedly arranged as the positioning face, which solves the problem of inaccurate positioning of the part due to the deformation of the pressure sensor in the prior art.

[0020] Other features and advantages of the present invention will be described in the following description or will be understood by implementing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the first state of an embodiment of the utility model.

[0022] Figure 2 It is a schematic diagram of the structure of the embodiment of the utility model in the second state.

[0023] In the figure: 1, pressure sensor; 2, positioning member; 3, conducting member; 4, spring sheet; 5, part to be positioned; 21, positioning groove; 31, conducting part; 32, rod part; 41, inner concave surface; 42, outer convex surface. DETAILED DESCRIPTION

[0024] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0025] like Figure 1 As shown, the fixture automatic positioning device of this embodiment includes:

[0026] A positioning member 2, wherein a first end of the positioning member 2 is used to contact a part 5 to be positioned, and a pressure sensor 1 is provided at a second end of the positioning member 2;

[0027] a conductive member 3, which is located in the positioning member 2 and can move relative to the positioning member 2;

[0028] The spring sheet 4 is clamped in the positioning groove 21 located on the inner wall of the positioning member 2 to separate the pressure sensor 1 from the conductive member 3; an inner concave surface 41 and an outer convex surface 42 are formed on both sides of the spring sheet 4;

[0029] and, a pressure sensor 1, whose sensing end extends into the positioning member 2 and is opposite to the inner concave surface 41;

[0030] In the initial state, one end of the conductive member 3 extends out of the first end of the positioning member 2, and the other end of the conductive member 3 abuts against the outer convex surface 42. When the conductive member 3 contacts the part to be positioned 5, it moves toward the second end of the positioning member 2, squeezing the spring sheet 4 to deform, so that the inner concave surface 41 squeezes the sensing end of the pressure sensor 1.

[0031] Specifically, the structure of the conductive member 3 includes a rod portion 32 and a conductive portion 31 , and the positioning member 2 is provided with a first cavity for accommodating the rod portion 32 and slidingly cooperating therewith, and a second cavity for accommodating the conductive portion 31 and slidingly cooperating therewith.

[0032] Specifically, the outer diameter of the conducting portion 31 is greater than the outer diameter of the rod portion 32. Accordingly, the size of the second cavity is greater than the size of the first cavity.

[0033] Specifically, the positioning groove 21 is arranged on the side wall of the second cavity.

[0034] Specifically, the positioning member 2 is fixedly arranged on the fixture device.

[0035] Specifically, the pressure sensor 1 is connected to the control module of the clamp device to transmit the pressure signal to the control module.

[0036] Specifically, the positioning member 2 is in the shape of a hollow rod.

[0037] The working principle of this embodiment:

[0038] See also Figure 2, the part 5 to be positioned is pressed against the end face of the first end of the positioning member 2 (i.e., the expected positioning face), the rod portion 32 of the conductive member 3 is pressed, and moves along the positioning member 2 toward its second end, so that the conductive portion 31 of the conductive member 3 presses against the spring sheet 4, the spring sheet 4 is deformed, and its inner concave surface 41 applies pressure to the pressure sensor 1, the pressure sensor 1 measures the pressure, and transmits the measured pressure value to the control module of the clamping device, which compares the measured pressure value with the preset pressure value to determine whether the part 5 to be positioned is clamped in place. If the measured pressure value is consistent with the preset pressure value, it is considered that the part 5 to be positioned is accurately positioned, otherwise it is considered that the positioning is incorrect and re-clamping is performed. When clamped in place, the part is processed, and after the processing is completed, the part is transferred, and the conductive member 3 moves along the positioning member 2 toward its first end under the elastic force of the spring sheet 4 until the rod portion 32 re-extends out of the positioning member 2. The utility model automatically determines whether the part is clamped in place, thereby improving the positioning accuracy.

[0039] Those skilled in the art can understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fixture automatic positioning device, characterized in that: include: A positioning member (2), wherein the first end of the positioning member (2) is used to contact the part to be positioned (5), and the second end of the positioning member (2) is provided with a pressure sensor (1): A conductive member (3) located in the positioning member (2) and capable of moving relative to the positioning member (2); A spring sheet (4) is clamped in a positioning groove (21) located on the inner wall of the positioning member (2) to separate the pressure sensor (1) from the conductive member (3); an inner concave surface (41) and an outer convex surface (42) are formed on both sides of the spring sheet (4); and, a pressure sensor (1), the sensing end of which extends into the positioning member (2) and is opposite to the inner concave surface (41); In the initial state, one end of the conductive member (3) extends out of the first end of the positioning member (2), and the other end of the conductive member (3) abuts against the outer convex surface (42). When the conductive member (3) contacts the part to be positioned (5), it moves toward the second end of the positioning member (2), squeezes the spring sheet (4) to deform, and causes the inner concave surface (41) to squeeze the sensing end of the pressure sensor (1).

2. The automatic fixture positioning device according to claim 1, characterized in that: The structure of the conductive member (3) comprises a rod portion (32) and a conductive portion (31), and the positioning member (2) is provided with a first cavity for accommodating the rod portion (32) and slidingly cooperating therewith, and a second cavity for accommodating the conductive portion (31) and slidingly cooperating therewith.

3. The automatic fixture positioning device according to claim 2, characterized in that: The outer diameter of the conductive portion (31) is greater than the outer diameter of the rod portion (32).

4. The automatic fixture positioning device according to claim 2, characterized in that: The positioning groove (21) is arranged on the side wall of the second cavity.

5. The automatic fixture positioning device according to claim 1, characterized in that: The positioning member (2) is fixedly arranged on the clamp device.

6. The automatic fixture positioning device according to claim 5, characterized in that: The pressure sensor (1) is connected to a control module of the clamp device and transmits a pressure signal to the control module.

7. The automatic fixture positioning device according to claim 1, characterized in that: The positioning member (2) is in the shape of a hollow rod.

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