CN215470445U - Thickness measuring system and polishing grinder - Google Patents

Abstract

The utility model discloses a thickness measuring system and a polishing grinding machine, and relates to the technical field of polishing and grinding, wherein the thickness measuring system is applied to the polishing grinding machine and is used for carrying out non-contact measurement on the thickness of a workpiece; the thickness measuring system comprises a detection unit and a sensing block matched with the detection unit, the detection unit is installed on the lower end face of the upper fixed disc, and the sensing block is installed on the upper end face of the upper disc driving piece. The utility model realizes the non-contact measurement of the thickness of the workpiece by the matching of the detection unit and the induction block, and is more stable, safe and reliable in use.

Description

Thickness measuring system and polishing grinder

Technical Field

The utility model relates to the technical field of polishing and grinding, in particular to a thickness measuring system and a polishing and grinding machine.

Background

In the polishing and grinding machine equipment, the thickness of the workpiece is measured by installing a thickness measuring system. In prior art devices, indirect measurements of the workpiece are usually made by mounting a measuring device, such as a displacement sensor probe, in the upper pan drive in contact with the upper pan top block. The displacement sensor probe on hardware is a mechanical rod which is stretched by a spring, and the problems of inaccurate measurement precision and the like caused by a blocking phenomenon can occur after long-term use; in the installation, the groove of the upper disc driving part needs to be opened for insertion installation, so that the difficulty is high in the subsequent process of installing the displacement sensor probe, trouble and time are wasted, and after-sale service is difficult; in use, the displacement sensor probe is inserted into the upper disc drive and is mechanically telescopic, and if the protection is not good, sand water can easily enter to cause damage, and the reliability coefficient is not high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a thickness measuring system and a polishing grinder, which realize non-contact measurement of the thickness of a workpiece through the cooperation of a detection unit and a sensing block, and are more stable, safe and reliable to use.

The purpose of the utility model is realized by adopting the following technical scheme:

the utility model discloses a thickness measuring system which is applied to a polishing grinding machine and used for carrying out non-contact measurement on the thickness of a workpiece, wherein the polishing grinding machine comprises an upper disc, an upper fixed disc, an upper disc driving part and a lower disc, the upper disc is matched with the lower disc, the upper disc driving part penetrates through the centers of the upper disc and the lower disc, the upper disc is fixedly connected with the upper fixed disc through a connecting part, and a gap is formed between the upper disc and the upper fixed disc; the thickness measuring system comprises a detection unit and a sensing block matched with the detection unit, the detection unit is installed on the lower end face of the upper fixed disc, and the sensing block is installed on the upper end face of the upper disc driving part.

In the first aspect of the present invention, as an alternative embodiment, an upper tray movable joint is fixedly or rotatably connected to a lower end surface of the upper tray, and the detecting unit is mounted on the upper tray movable joint through a mounting block.

In the first aspect of the present invention, as an alternative embodiment, the mounting block includes a first mounting block and a second mounting block, an upper end of the first mounting block is fixedly connected to the upper plate movable joint, an upper end of the second mounting block is fixedly or detachably connected to a lower side of the first mounting block, and the detecting unit is fixedly mounted on a lower end surface of the second mounting block.

In the first aspect of the present invention, as an optional embodiment, the first mounting block or/and the second mounting block may be a telescopic structure, or/and the second mounting block may extend into the first mounting block.

In the first aspect of the present invention, as an optional embodiment, the detecting unit is an eddy current displacement sensor, and the sensing block is a metal sensing sheet.

In the first aspect of the present invention, as an optional embodiment, the thickness measuring system further includes a PLC, where the PLC is connected to the detecting unit in a wired or wireless manner, and is configured to receive a detection signal of the detecting unit.

In a second aspect, the utility model discloses a polishing grinder, which is characterized by comprising the thickness measuring system of the first aspect of the utility model.

In the second aspect of the present invention, as an optional embodiment, the polishing and grinding machine further includes a gear ring, a central gear and a planetary gear, the gear ring is disposed between the upper disc and the lower disc, the planetary gear is engaged with the central gear and the gear ring, the central gear is sleeved on the upper disc driving member and rotates around the upper disc driving member, and a hollow groove for placing a workpiece to be polished and ground is formed in an upper end surface of the planetary gear.

In the second aspect of the present invention, as an alternative embodiment, the number of the planetary wheels is one or more, and each planetary wheel is provided with one or more hollow-out grooves.

Compared with the prior art, the utility model has the beneficial effects that: the thickness measuring system fixes the detection unit on the upper fixed disc, and the induction block is arranged on the upper disc driving part to indirectly measure the thickness of the workpiece in a non-contact mode. Because the distance measurement is carried out in a non-contact mode, other problems of hardware per se can not occur. In the installation, only need to install detecting element on last price fixing, fix the response piece on hanging wall driving piece can, simple to operate is convenient for later maintenance. In use, the detection unit only acts on the induction block, special protection is not needed, and for media such as sand water and the like, the detection unit is not damaged, and the measurement distance is not interfered.

Drawings

FIG. 1 is a schematic view of a polishing grinder according to an embodiment of the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1 according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating the mating relationship of the upper and lower plates according to an embodiment of the present invention;

FIG. 4 is a flow chart of a method of using the polishing grinder in accordance with an embodiment of the present invention.

In the figure: 10. a support; 21. hanging the plate; 22. an upper fixed disc; 221. an upper plate movable joint; 23. a connecting member; 30. a bottom wall; 41. a first mounting block; 42. a second mounting block; 50. a detection unit; 60. an induction block; 70. an upper pan drive; 80. a ring gear; 90. a wandering star wheel; 91. hollowing out the grooves; 100. a sun gear.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. Except as specifically noted, the materials and equipment used in this example are commercially available. Examples of embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.

In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "connected," "communicating," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a connection through an intervening medium, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example one

The embodiment one provides a thickness measuring system. It is applied to polishing grinders, in particular to double-sided machines.

In the preferred embodiment of the present invention, a polishing and grinding machine (also called polishing machine, grinding machine or grinding machine) is shown in fig. 1-3, which mainly comprises a frame 10, an upper disc 21, an upper fixed disc 22, an upper disc driving member 70 and a lower disc 30 mounted on the frame 10. Wherein, the upper disc 21 and the lower disc 30 are matched for polishing and grinding the workpiece placed on the lower disc 30. The upper disc drive 70 is a cylindrical structure and is mounted on the bracket 10, and the upper disc drive 70 passes through the centers of the upper disc 21 and the lower disc 30. The upper disc driving member 70 has two functions, one is used for guiding the movement of the upper disc 21 and the lower disc 30 when the upper disc 21 or/and the lower disc 30 move, the centers of the upper disc 21 and the lower disc 30 are both provided with a through hole, when the upper disc 21 or the lower disc 30 moves towards each other, the upper disc driving member 70 is inserted into the through hole matched with the upper disc driving member, and the central axes of the upper disc 21 and the lower disc 30 are ensured to be overlapped. The upper disc drive 70 is also used to limit the upper disc 21, the lower disc 30, and the sun gear 100, and to rotate the upper disc 21, the lower disc 30, and the sun gear 100 around the upper disc drive 70.

The upper fixed plate 22 is located above the upper plate 21 and is fixedly connected with the upper plate 21 through a connecting piece 23, and the connecting piece 23 ensures that the upper fixed plate 22 and the upper plate 21 are fixedly connected and have a certain gap. Thereby facilitating the installation of the sensing unit 50 and achieving non-contact measurement of the sensing unit 50.

Specifically, referring to fig. 2, the thickness measuring system mainly includes a detecting unit 50 and a sensing block 60, the detecting unit 50 is installed at a central position of the lower side of the upper fixed plate 22, and the sensing block 60 is installed at an upper end surface of the upper plate driving member 70. It can be understood that when the upper plate 21 or the lower plate 30 moves to the opposite position, i.e. clings to it, the sensing block 60 does not directly contact the detecting unit 50, so that the purpose of non-contact measurement is achieved.

For the convenience of mounting, the sensor block 60 is directly fixed to the upper end surface of the upper tray driving member 70, and the detecting unit 50 is mounted to the upper tray movable joint 221 provided on the lower end surface of the upper tray 22 via the mounting block. The upper disc movable joint 221 may be directly fixed, for example, welded, or detachably mounted on the lower end surface of the upper fixed disc 22, the upper disc movable joint 221 rotates with the rotation of the upper fixed disc 22, or a groove may be formed on the lower end surface of the upper fixed disc 22, the upper disc movable joint 221 is rotatably connected with the upper fixed disc 22, and when the upper fixed disc 22 rotates, the upper disc movable joint 221 does not rotate with the upper fixed disc 22.

The mounting block may be of a fixed length and is directly fixed to the lower end of the upper plate knuckle 221. Of course, the mounting block may also be a telescopic structure, which can be adapted to different polishing grinders, and can also be used to adjust the initial distance between the detecting unit 50 and the sensing block 60.

In the preferred embodiment of the present invention, the mounting block includes a first mounting block 41 and a second mounting block 42, the upper end of the first mounting block 41 is fixedly connected to the upper disc movable joint 221, the upper end of the second mounting block 42 is fixedly or detachably connected to the lower side of the first mounting block 41, and the detecting unit 50 is fixedly mounted on the lower end surface of the second mounting block 42. One or both of the first mounting block 41 and the second mounting block 42 are of a telescopic structure, such as a multi-joint connecting column. Of course, the hollow structure may be disposed on the first mounting block 41, the second mounting block 42 is sleeved in the first mounting block 41, and the second mounting block 42 is fixed by disposing a plurality of nuts in the radial direction of the first mounting block 41, so that the initial distance between the detection unit 50 and the sensing block 60 can be adjusted by how much the second mounting block 42 extends into the first mounting block 41.

Of course, in other embodiments, the position of the first mounting block 41 can be adjusted by the first mounting block 41 being detachably engaged with the upper disc movable joint 221.

The detection unit 50 includes, but is not limited to, an eddy current displacement sensor, an X-ray thickness gauge, a Y-ray thickness gauge, an ultrasonic, infrared, and laser thickness gauges, and the like.

In the preferred embodiment of the utility model, the non-contact indirect measurement of the thickness of the workpiece is realized by adopting the matching structure of the eddy current displacement sensor and the metal sensing block. The eddy current displacement sensor performs distance measurement by passing a high-frequency magnetic field formed by a high-frequency current through a sensing head coil. When the metal induction block 60 is in a magnetic field, its surface will form an eddy current perpendicular to the direction of the magnetic flux due to electromagnetic induction. This causes the resistance of the sensing head coil to change accordingly; the eddy current displacement sensor measures the distance between the sensing head and the subject from this state (amplitude) change.

In the thickness measuring system, a receiver for receiving the detection signal of the detection unit 50 is further included, and the receiver may be any device having a processing function, such as a single chip or a PLC. The control device has a processing function and is mainly used for controlling the operation of a subsequent polishing and grinding machine according to the detection signal.

Of course, a conditioning circuit, such as a filter circuit and an amplifying circuit, may be further disposed between the detection unit 50 and the receiver, and the receiver may further display the detection signal through a certain display device, such as an LCD screen or an LED screen.

In summary, the thickness measuring system of the present invention fixes the detecting unit 50 to the upper surface plate 22, and mounts the sensor block 60 on the upper plate driving member 70 to perform indirect measurement of the thickness of the workpiece in a non-contact manner. Because the distance measurement is carried out in a non-contact mode, other problems of hardware per se can not occur. In the installation, only the detection unit 50 needs to be installed on the upper fixed disc 22, and the induction block 60 is fixed on the upper disc driving part 70, so that the installation is convenient and simple, and the later maintenance is convenient. In use, the detection unit 50 only acts on the sensing block 60, no special protection is needed, and the detection unit 50 is not damaged or the measurement distance is not interfered for media such as sand water.

Example two

The second embodiment discloses a polishing grinder, which comprises the thickness measuring system in the first embodiment. Referring to fig. 1-3, the polishing and grinding machine mainly includes a frame 10, and an upper plate 21, an upper fixed plate 22, an upper plate driving member 70 and a lower plate 30 mounted on the frame 10. Wherein, the upper disc 21 and the lower disc 30 are matched for polishing and grinding the workpiece placed on the lower disc 30.

In a preferred embodiment of the present invention, referring to fig. 3, a ring gear 80 is disposed between the upper disc 21 and the lower disc 30, the polishing grinder further includes the ring gear 80, a planetary gear 90 and a central gear 100, the ring gear 80 is disposed between the upper disc 21 and the lower disc 30, and the central gear 100 is sleeved on the upper disc driving member 70 and can rotate around the upper disc driving member 70. The planetary wheel 90 is meshed with the gear ring 80 and the central gear 100; so that the planetary gear 90 revolves around the sun gear 100 and can rotate.

The workpiece to be polished and ground is placed in the hollow groove 91 formed in the upper end face of the planetary gear 90, the planetary gear 90 may be multiple, and the number of the hollow grooves 91 formed in each planetary gear 90 may also be multiple. It will be understood that the shape and size of the hollow-out slot 91 are adapted to the workpiece to be polished, and when the workpiece to be polished is replaced with another shape and/or size, the matching can be achieved by replacing the corresponding planetary wheel 90.

The polishing grinder also comprises a power mechanism. The power mechanism includes a driving mechanism, such as a motor, for driving the upper plate 21, the lower plate 30, the sun gear 100, and the ring gear 80 to rotate, and a driving mechanism, such as an air cylinder, for driving the upper plate 21 or the lower plate 30 to move toward each other. In the preferred embodiment of the present invention, in order to prevent the grinding workpiece to be polished from falling off from the hollow groove 91 due to gravity, the lower disc 30 is not moved to close the lower end surface of the hollow groove 91, and only the upper disc 21 is moved.

After the workpiece to be polished and ground is placed in the hollow groove 91, the upper disc 21 is moved by the air cylinder, the upper disc 21 and the lower disc 30 are pressed against the workpiece to be polished and ground, and the driving mechanism for rotating the upper disc 21, the lower disc 30, the central gear 100 and the gear ring 80 is started, so that the double sides of the workpiece to be polished and ground can be polished and ground. Of course, if only the upper disc 21 or the lower disc 30 is rotated, only the single-side polishing and grinding of the workpiece to be polished and ground is performed.

In some other embodiments, if the lower disc 30 and the ring gear 80 are fixedly connected, single-side polishing and grinding of the upper end surface of the workpiece to be polished and ground can be achieved.

Referring to fig. 4, in combination with the thickness measuring system of the first embodiment, the method for using the polishing grinder includes the following steps:

s110, under the condition that the workpiece to be polished and ground is not placed, one of the upper disc 21 and the lower disc 30 is driven to move towards the other one of the upper disc 21 and the lower disc 30, and when the pressure between the upper disc 21 and the lower disc 30 reaches a preset pressure value, a first distance measured by the thickness measuring system is obtained.

The present invention will be explained and illustrated by taking as an example the case of driving the upper tray 21 to move toward the lower tray 30. And under the condition that the grinding workpiece to be polished is not placed, the upper disc 21 is driven to move towards the lower disc 30, and when the pressure between the upper disc 21 and the lower disc 30 reaches a preset pressure value, a first distance measured by the thickness measuring system is obtained.

The preset pressure value is generally a pressure value when the upper disc 21 and the lower disc 30 are pressed tightly, and the pressure value can be acquired by acquiring a power value of the air cylinder. In a preferred embodiment of the present invention, the preset pressure value may be a fixed value, such as 2000N, or may be a range, such as 1950N-2050N, which is not limited herein.

S120, placing the workpiece to be polished and ground in the hollow groove 91 of the planetary wheel 90, driving the upper disc 21 to move towards the lower disc 30 until the pressure value between the upper disc 21 and the lower disc 30 is a preset pressure value, and obtaining a second distance measured by the thickness measuring system.

On the basis of the step S110, it can be understood that before the step S120 is executed, the upper disc 21 needs to be moved, so that the grinding workpiece to be polished can be placed in the hollow groove 91 of the planetary wheel 90.

And S130, when the thickness value obtained by subtracting the first distance from the second distance is larger than the preset thickness, starting the gear ring 80, the central gear 100, the upper disc 21 or/and the lower disc 30 to rotate, and polishing and grinding the workpiece to be polished and ground.

The second distance minus the first distance is the current thickness of the workpiece to be polished, if the current thickness is greater than the required thickness, the workpiece to be polished needs to be polished and ground, and the specific implementation of polishing and grinding is set as required, for example, the gear ring 80, the central gear 100, the upper disc 21 and the lower disc 30 are started to rotate simultaneously to implement double-sided polishing and grinding, or the gear ring 80, the central gear 100 and the upper disc 21 are started to rotate to implement polishing and grinding of the upper end surface, or the gear ring 80, the central gear 100 and the lower disc 30 are started to rotate to implement polishing and grinding of the lower end surface.

And S140, acquiring a third distance measured by the thickness measuring system in the polishing and grinding process in real time until the thickness value obtained by subtracting the first distance from the third distance is equal to the preset thickness, and finishing polishing and grinding the workpiece to be polished and ground.

In the polishing and grinding process, the detection unit 50 transmits the measured third distance to a receiver such as a PLC in real time, the PLC calculates the real-time thickness of the workpiece in real time, that is, the difference between the third distance and the first distance, when the real-time thickness is equal to the preset thickness, the polishing and grinding of the workpiece is completed, and the PLC can control the power mechanism for driving the ring gear 80 of the planetary gear 90, the central gear 100, the upper disc 21 and the lower disc 30 to rotate to stop; and finishing the polishing and grinding of the workpiece to be polished and ground. And taking out the polished and ground workpiece, and operating other workpieces to be polished and ground.

The above embodiments are only preferred embodiments of the present invention, and the scope of the embodiments of the present invention should not be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the embodiments of the present invention are within the scope of the claims of the embodiments of the present invention.

Claims (9)

1. A thickness measuring system is characterized by being applied to a polishing grinding machine and used for carrying out non-contact measurement on the thickness of a workpiece, wherein the polishing grinding machine comprises an upper disc, an upper fixed disc, an upper disc driving part and a lower disc, the upper disc is matched with the lower disc, the upper disc driving part penetrates through the centers of the upper disc and the lower disc, the upper disc is fixedly connected with the upper fixed disc through a connecting part, and a gap is reserved between the upper disc and the upper fixed disc; the thickness measuring system comprises a detection unit and a sensing block matched with the detection unit, the detection unit is installed on the lower end face of the upper fixed disc, and the sensing block is installed on the upper end face of the upper disc driving part.

2. The thickness measuring system of claim 1, wherein an upper disc movable joint is fixedly or rotatably connected to a lower end surface of the upper fixed disc, and the detecting unit is mounted on the upper disc movable joint through a mounting block.

3. The thickness measuring system of claim 2, wherein the mounting block comprises a first mounting block and a second mounting block, the upper end of the first mounting block is fixedly connected to the upper disc movable joint, the upper end of the second mounting block is fixedly or detachably connected to the lower side of the first mounting block, and the detecting unit is fixedly mounted on the lower end face of the second mounting block.

4. A thickness measuring system according to claim 3, wherein the first mounting block or/and the second mounting block is of a telescopic construction or/and the second mounting block is extendable into the first mounting block.

5. The thickness measuring system according to any one of claims 1 to 4, wherein the detecting unit is an eddy current displacement sensor, and the sensing block is a metal sensing sheet.

6. The thickness measuring system according to any one of claims 1 to 4, further comprising a PLC, wherein the PLC is connected with the detection unit in a wired or wireless manner and is used for receiving the detection signal of the detection unit.

7. A polishing grinder characterized in that it comprises a thickness measuring system according to any one of claims 1 to 6.

8. The polishing grinder of claim 7, further comprising a gear ring, a central gear and a planetary gear, wherein the gear ring, the central gear and the planetary gear are arranged between the upper disc and the lower disc, the planetary gear is meshed with the central gear and the gear ring, the central gear is sleeved on the upper disc driving member and rotates around the upper disc driving member, and a hollow groove for placing a workpiece to be polished and ground is formed in the upper end face of the planetary gear.

9. The polishing grinder of claim 8, wherein the number of the planetary wheels is one or more, and each planetary wheel is provided with one or more hollow-out grooves.

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