Internal thread grinding machine grinding wheel height difference measuring device

Abstract

The utility model discloses an internal thread grinding machine grinding wheel height difference measuring device comprising a core shaft which is detachably installed in a grinding machine three-jaw chuck; the connecting sleeve is detachably mounted on the core shaft, and the connecting sleeve and the core shaft are concentrically arranged; the pressing plates are mounted on the peripheral surface of the connecting sleeve and are in central symmetry about the axis of the connecting sleeve; and the at least two measuring meters are mounted at the outer end parts of the pressing plates in a one-to-one correspondence manner and are in central symmetry about the axis of the connecting sleeve. The three-jaw chuck of the grinding machine rotates to drive the measuring meter to synchronously rotate by 180 degrees, and the indicating value of the measuring meter is the height difference value (namely the height difference between the axis of the grinding wheel and the axis of the mandrel); operation is easy and convenient, and adjustment and measurement can be conducted synchronously (namely, measurement is conducted while the position of the grinding wheel is adjusted); and the measurement precision is high and can be within 0.01 mm.

Description

Technical Field

[0001] This utility model belongs to the field of measuring auxiliary equipment technology, and relates to a height difference measuring device, specifically a height difference measuring device for an internal thread grinding wheel. Background Technology

[0002] A thread grinder is a grinding machine used to produce thread machining tools and thread measuring instruments. It uses a shaped grinding wheel as an abrasive to machine precision threads. Grinding wheels are typically installed inside a grinding machine according to a specific structure. For example, Chinese Utility Model Patent Application No. 201320896126.2 discloses a grinding wheel mounting structure for a grinding machine, including a grinding machine spindle head and a grinding wheel fitted onto the spindle head. The grinding wheel is coaxial with the spindle head, which is a tapered cylinder. A bushing is fitted onto the spindle head, positioned between the grinding wheel and the spindle head. The bushing has a tapered hole that mates with the outer circumferential surface of the spindle head. The bushing has a first limiting flange and a first flange. A limiting sleeve is fitted onto the bushing, and the limiting sleeve has a second flange and a second limiting flange. The grinding wheel is fitted onto the first flange and the second flange, positioned between the first limiting flange and the second limiting flange. The first flange on the bushing and the second flange on the limiting sleeve are connected by screws. The end of the spindle head is fixed to a connecting disc via a thread, and the connecting disc is connected to a linear dynamic balancing device, pressing the bushing tightly.

[0003] In actual use, it is necessary to first measure the height of the spindle head (with the grinding wheel installed), the workpiece spindle, and other structures, and then calculate the difference in center height between the workpiece spindle and the grinding wheel. This requires measuring the diameter of each comparison block, and the measurement and calculation steps are cumbersome. Multiple measurements result in large cumulative errors and cannot be adjusted in real time. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by providing a device for measuring the height difference of grinding wheels on internal thread grinding machines, thereby simplifying the operation steps.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a device for measuring the height difference of grinding wheels on an internal thread grinding machine, comprising:

[0006] A mandrel, which is detachably mounted in a three-jaw chuck of a grinding machine;

[0007] A connecting sleeve, which is detachably mounted on and concentrically disposed with the mandrel;

[0008] At least two pressure plates are mounted on the outer circumferential surface of the connecting sleeve and are symmetrical about the center line of the connecting sleeve.

[0009] At least two measuring gauges are installed one-to-one on the outer end of the pressure plate and are symmetrical about the axis of the connecting sleeve.

[0010] Ideally, the mandrel is inserted into the three-jaw chuck of the grinding machine.

[0011] Furthermore, the connecting sleeve is mounted on the spindle by multiple fasteners.

[0012] Furthermore, the fastener is a screw, bolt, pin, rivet, or stud.

[0013] Ideally, one end of the pressure plate is mounted on the outer circumferential surface of the connecting sleeve, and the other end extends horizontally outward beyond the free end of the mandrel.

[0014] Furthermore, the measuring head of the measuring instrument extends to the inner side corresponding to the pressure plate.

[0015] Ideally, the pressure plate and the measuring gauge are two independent entities.

[0016] Ideally, the measuring instrument is a dial indicator or a micrometer.

[0017] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The thread grinding machine grinding wheel height difference measuring device of this utility model, by installing at least two pressure plates and a measuring gauge on the outer circumferential surface of the connecting sleeve, makes the measuring head of the measuring gauge contact the grinding wheel generatrix during use. After the measuring gauge is zeroed, the three-jaw chuck of the grinding machine rotates, driving the measuring gauge to rotate synchronously by 180°. The reading of the measuring gauge is the height difference (i.e., the height difference between the grinding wheel axis and the mandrel axis); it is easy to operate and can perform adjustment and measurement simultaneously (i.e., adjust the grinding wheel position while measuring); the measurement accuracy is high, reaching within 0.01mm. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the use of the internal thread grinding wheel height difference measuring device of this utility model;

[0019] Figure 2 This is a side view of the internal thread grinding wheel height difference measuring device of this utility model;

[0020] Figure 3 This is the front view of the internal thread grinding wheel height difference measuring device of this utility model. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0022] The following descriptions of embodiments are taken with reference to the accompanying drawings, illustrating specific embodiments in which this utility model can be implemented. Directional terms used in this utility model, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and "side," are merely for directional reference to the drawings. Therefore, the directional terms used are for illustration and understanding of this application, and not for limiting this application. Furthermore, in the specification, unless explicitly stated otherwise, the words "comprising" or "including" should be understood to mean including the element, but not excluding any other elements.

[0023] like Figures 1 to 3 The internal thread grinding machine grinding wheel height difference measuring device shown is installed in the grinding machine 1' for use. The grinding machine 1' can be a conventional one, such as one that typically has a three-jaw chuck 10', a grinding wheel support 11', a grinding rod 12' (i.e., a spindle or rotating shaft), and a grinding wheel 13' (refer to the Chinese Utility Model Patent Application No. 202220149834.9). The three-jaw chuck 10' and the grinding wheel 12' are arranged opposite each other and are matched, and the axis of the grinding rod 12' is usually set horizontally. Before the grinding machine 1' performs the grinding operation, the operator inserts the workpiece spindle, on which the workpiece to be processed is mounted, into the three-jaw chuck 10' (the workpiece spindle and the three-jaw chuck 10' are concentric, and the space between the three-jaw chuck 10' and the grinding wheel 12' is the processing space), and then performs the grinding operation (grinding the internal threads of the workpiece to be processed); however, before inserting the workpiece spindle, it is necessary to ensure the concentricity of the grinding wheel 13' and the workpiece spindle in order to ensure the grinding quality of the internal threads. Therefore, it is necessary to first use the grinding wheel height difference measuring device of this application for internal thread grinding machine to measure and adjust.

[0024] The internal thread grinding wheel height difference measuring device of this application mainly includes a measuring gauge 11, a mandrel 12, a connecting sleeve 13, and a pressure plate 14.

[0025] The mandrel 12 is detachably mounted in the three-jaw chuck 10' of the grinding machine, meaning the mandrel 12 is inserted into the three-jaw chuck 10' (at this time, no workpiece spindle is mounted on the three-jaw chuck 10'). The connecting sleeve 13 is detachably mounted on the mandrel 12 and concentrically arranged therewith, typically mounted on or near the free end of the mandrel 12; specifically, the connecting sleeve 13 is mounted on the mandrel 12 by multiple fasteners 15, which can be conventional fasteners such as screws, bolts, pins, rivets, or studs.

[0026] There are at least two pressure plates 14, which are mounted on the outer circumferential surface of the connecting sleeve 13 and are symmetrical about the axis of the connecting sleeve 13 (to simplify the structure of the internal thread grinding wheel height difference measuring device, the connection between the pressure plate 14 and the connecting sleeve 13 can also be achieved by corresponding fasteners 15, that is, the fasteners 15 connect the pressure plate 14 and the connecting sleeve 13 together and are mounted on the spindle 12); in this embodiment, there are two pressure plates 14, which are symmetrical about the axis of the connecting sleeve 13. There are also at least two measuring gauges 11, which are mounted one-to-one on the outer end (i.e., the free end) of the pressure plate 14 and are also symmetrical about the axis of the connecting sleeve 13; in this embodiment, there are also two measuring gauges 11, which are also symmetrical about the axis of the connecting sleeve 13.

[0027] In this embodiment, one end of the pressure plate 14 is mounted on the outer peripheral surface of the connecting sleeve 13, while the other end extends horizontally outward (i.e., away from the direction of the three-jaw chuck 10') beyond the free end of the mandrel 12. The measuring head of the measuring instrument 11 penetrates the pressure plate 14 and extends to the inner side of the corresponding pressure plate 14; it is preferably a dial indicator or a micrometer indicator.

[0028] During use, the measuring head of the measuring gauge 11 is brought into contact with the generatrix of the grinding wheel 13' (i.e., the outer circumferential surface of the grinding wheel 13'). After zeroing the measuring gauge 11, the three-jaw chuck 10' of the grinding machine rotates, causing the measuring gauge 11 to rotate synchronously by 180°. The reading on the measuring gauge is the height difference (i.e., the height difference between the axis of the grinding wheel 13' and the axis of the mandrel 12). If the measured height difference does not meet the requirements, the position of the grinding wheel 13' can be manually adjusted while measuring. After the requirements are met, the mandrel 12 is removed, and the workpiece spindle carrying the workpiece to be processed is installed (inserted into the three-jaw chuck 10' of the grinding machine), followed by the grinding operation.

[0029] As can be seen, the above-mentioned internal thread grinding wheel height difference measuring device is easy to operate and can perform adjustment and measurement simultaneously (i.e., adjust the position of the grinding wheel 13' while measuring); the measurement accuracy is high, reaching within 0.01mm.

[0030] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A device for measuring the height difference of grinding wheels on an internal thread grinding machine, characterized in that it... include: Mandrel (12), which is detachably mounted in the three-jaw chuck (10') of the grinding machine; A connecting sleeve (13) is detachably mounted on the spindle (12) and is concentrically arranged therewith; At least two pressure plates (14) are mounted on the outer peripheral surface of the connecting sleeve (13) and are symmetrical about the axis of the connecting sleeve (13); At least two measuring gauges (11) are installed one-to-one on the outer end of the pressure plate (14) and are symmetrical about the axis of the connecting sleeve (13).

2. The internal thread grinding machine grinding wheel height difference measuring device according to claim 1, characterized in that: The mandrel (12) is inserted into the three-jaw chuck (10') of the grinding machine.

3. The internal thread grinding wheel height difference measuring device according to claim 1 or 2, characterized in that: The connecting sleeve (13) is mounted on the spindle (12) by multiple fasteners (15).

4. The internal thread grinding machine wheel height difference measuring device according to claim 3, characterized in that: The fastener (15) is a screw, bolt, pin, rivet or stud.

5. The internal thread grinding wheel height difference measuring device according to claim 1, characterized in that: One end of the pressure plate (14) is mounted on the outer circumferential surface of the connecting sleeve (13), and the other end extends horizontally outward to the free end beyond the mandrel (12).

6. The internal thread grinding wheel height difference measuring device according to claim 1 or 5, characterized in that: The measuring head of the measuring instrument (11) extends to the inside of the pressure plate (14).

7. The internal thread grinding wheel height difference measuring device according to claim 1, characterized in that: The pressure plate (14) and the measuring instrument (11) are two independent components.

8. The internal thread grinding machine grinding wheel height difference measuring device according to claim 1, characterized in that: The measuring instrument (11) is a dial gauge or a per mille gauge.

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