A positioning pin-pulling mechanism with proximity sensing

Abstract

A positioning pin extraction mechanism with proximity sensing includes a proximity sensor, a base plate, a linear cylinder, a positioning pin, a positioning pin sleeve, and an induction signal receiving controller; the proximity sensor is installed on the top surface of the base plate; the linear cylinder is installed on the bottom surface of the base plate, and the linear cylinder is coaxially arranged with the positioning pin and the positioning pin sleeve; the positioning pin and the positioning pin sleeve are slidably matched, the positioning pin sleeve is installed on the base plate, the positioning pin is connected to the linear cylinder, and the proximity sensor is located on one side of the positioning pin. The pin extraction mechanism of this case is provided with a proximity sensor on the top surface of the base plate, and an induction signal receiving controller is added to the machine tool accordingly. The proximity sensor can sense the separation of the positioning pin and the positioning hole, so that the cooperation between the positioning pin and the positioning hole is more stable during the workpiece processing, and various faults that cause damage to the machine tool, damage to the tool, and scrapped parts are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a positioning pin-pulling mechanism with proximity sensing. Background Art

[0002] In some machining processes, the positioning hole A on the workpiece is first used to position the workpiece when machining the workpiece structure B, and then the positioning hole A itself is further refined in terms of the aperture and position.

[0003] Usually, when processing the workpiece structure B, a locating pin is inserted into the locating hole A through the pin extraction mechanism to position the workpiece; and when finishing the locating hole A itself, the pin extraction mechanism needs to take the locating pin out of the locating hole A and cooperate with other fixtures to clamp the workpiece so that the workpiece is fixed when finishing the locating hole A.

[0004] The existing pin extraction structure often has abnormal reciprocating motion due to power source failure, cylinder failure, jamming of the movable mechanism, etc., which causes the positioning hole A and the positioning pin to be unable to disengage normally, which in turn causes the positioning pin to be over-positioned and interference in the machining process. In the least, the parts will be scrapped, the pin extraction mechanism will be damaged, and the tool will be damaged. In serious cases, the machine tool accuracy will be affected. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a positioning pin-drawing mechanism with proximity sensing to overcome the deficiencies in the prior art.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A positioning pin-pulling mechanism with proximity sensing includes a proximity sensor, a base plate, a linear oil cylinder, a positioning pin, a positioning pin sleeve, and an induction signal receiving controller;

[0008] The proximity sensor is mounted on the top surface of the substrate;

[0009] The linear oil cylinder is mounted on the bottom surface of the base plate;

[0010] The positioning pin is slidably matched with the positioning pin sleeve, the positioning pin sleeve is installed on the base plate, the positioning pin is connected with the linear oil cylinder, and the proximity sensor is located at one side of the positioning pin.

[0011] Furthermore, the linear cylinder is coaxially arranged with the positioning pin and the positioning pin sleeve.

[0012] Preferably, the base plate is made of 45# steel, and the upper and lower surfaces of the base plate are flat-ground.

[0013] Preferably, the locating pin and the locating pin sleeve are made of hot working die steel.

[0014] Preferably, the proximity sensor is a photoelectric sensor, and its model is EV-108MC.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1) In this case, a positioning pin extraction mechanism with proximity sensing is provided with a proximity sensor on the top surface of the substrate, and a corresponding sensing signal receiving controller is added to the machine tool. The proximity sensor can sense the separation of the positioning pin and the positioning hole, so that the coordination between the positioning pin and the positioning hole is more stable during workpiece processing, thus preventing machine tool damage, tool damage, parts scrapping, etc. caused by various faults.

[0017] 2) The positioning pin-pulling mechanism with proximity sensing in this case has a reasonable structural layout, simple design and obvious effect.

[0018] 3) The positioning pin-pulling mechanism with proximity sensing in this case has good universality in principle and can be used for similar products.

[0019] In order to more clearly understand the present invention, the following will describe the preferred implementation modes of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure ID:

[0022] 1- proximity sensor, 2- base plate, 3- linear cylinder, 4- positioning pin, 5- positioning pin sleeve. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes, mainly to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components, and cannot be understood as indicating or implying relative importance.

[0025] In addition, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components; for ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0026] See also Figure 1 The utility model provides a positioning pin-pulling mechanism with proximity sensing, comprising a proximity sensor 1, a base plate 2, a linear oil cylinder 3, a positioning pin 4, a positioning pin sleeve 5, and an induction signal receiving controller (not shown).

[0027] The proximity sensor 1 is mounted on the top surface of the substrate 2;

[0028] The linear cylinder 3 is mounted on the bottom surface of the base plate 2;

[0029] The positioning pin 4 is slidably matched with the positioning pin sleeve 5, the positioning pin sleeve 5 is installed on the base plate 2, the positioning pin 4 is connected to the linear cylinder 3, and the proximity sensor 1 is located on one side of the positioning pin 4;

[0030] Preferably, in this embodiment, the base plate 2 is made of 45# steel, and the upper and lower surfaces of the base plate 2 are flat-ground to ensure the parallelism of the mounting surface.

[0031] Preferably, in this embodiment, the locating pin 4 and the locating pin sleeve 5 are made of H13 hot working die steel, and are heat treated to HRC50° Rockwell hardness of more than 50 degrees to increase the hardness and ensure its wear resistance.

[0032] Preferably, in this embodiment, the linear cylinder 3 is coaxially arranged with the positioning pin 4 and the positioning pin sleeve 5 .

[0033] Preferably, in this embodiment, the proximity sensor 1 is a photoelectric sensor, and its model is EV-108MC.

[0034] The working principle of the positioning pin-pulling mechanism with proximity sensing in this case is as follows:

[0035] 1. When the fixture releases the workpiece, the linear cylinder 3 is pushed out, the connected positioning pin 4 rises, the positioning pin is inserted into the positioning hole on the workpiece, the workpiece is positioned, and the machine tool processes the workpiece structure B.

[0036] 2. When the fixture clamps the workpiece, the linear cylinder 3 retracts, the connected positioning pin 4 descends, and the positioning pin disengages from the positioning hole A. The proximity sensor 1 senses the signal of the positioning pin 4 descending, and feeds the signal back to the sensing signal receiving controller on the machine tool. After receiving the signal, the machine tool controls the fixture to clamp the workpiece and perform fine processing on the positioning hole A of the workpiece.

[0037] Compared with the prior art, a positioning pin-pulling mechanism with proximity sensing in this case is provided with a proximity sensor on the top surface of the substrate, and a corresponding sensing signal receiving controller is added on the machine tool. The proximity sensor can sense the separation of the positioning pin and the positioning hole, so that the coordination between the positioning pin and the positioning hole is more stable during workpiece processing, eliminating machine tool damage, tool damage, parts scrapping, etc. caused by various faults.

[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A positioning pin-pulling mechanism with proximity sensing, characterized in that: It comprises a proximity sensor (1), a base plate (2), a linear oil cylinder (3), a positioning pin (4), a positioning pin sleeve (5), and a sensing signal receiving controller; The proximity sensor (1) is mounted on the top surface of the substrate (2); The linear oil cylinder (3) is mounted on the bottom surface of the base plate (2); The positioning pin (4) is slidably matched with the positioning pin sleeve (5), the positioning pin sleeve (5) is installed on the base plate (2), the positioning pin (4) is connected to the linear oil cylinder (3), and the proximity sensor (1) is located on one side of the positioning pin (4).

2. A positioning pin-pulling mechanism with proximity sensing according to claim 1, characterized in that: The linear oil cylinder (3) is coaxially arranged with the positioning pin (4) and the positioning pin sleeve (5).

3. A positioning pin-pulling mechanism with proximity sensing according to claim 2, characterized in that: The base plate (2) is made of 45# steel, and the upper and lower surfaces of the base plate (2) are flat-ground.

4. A positioning pin-pulling mechanism with proximity sensing according to claim 3, characterized in that: The positioning pin (4) and the positioning pin sleeve (5) are made of hot working die steel.

5. A positioning pin-pulling mechanism with proximity sensing according to claim 4, characterized in that: The proximity sensor (1) is a photoelectric sensor, and its model is EV-108MC.

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