Positioning gauge for gear machining

Abstract

The utility model provides a positioning device for gear machining, including tooth mould gauge, rotating device and detection device, be equipped with with the positioning structure of tooth blank matching on tooth mould gauge, detection device is used for identifying whether to kiss, if height is unusual, then trigger rotating device drives tooth mould gauge to rotate, until tooth blank falls into the clamping slot and restores predetermined height. The utility model can automatically correct tooth blank processing posture, improves the clamping success ratio and processing efficiency, is applicable to the gear automation production line.

Description

Technical Field

[0001] This utility model relates to the field of gear processing equipment technology, and specifically to a positioning gauge for gear processing. Background Technology

[0002] In the precision machining of gears, the accuracy of the gear's posture directly determines the machining quality and the stability of equipment operation. If the gear is deflected during machining or if the teeth do not perfectly match the positioning structure of the fixture on the machining platform, it can easily lead to machining errors, equipment alarms, or even shutdowns, seriously affecting production efficiency and product qualification rate. In traditional methods, a robotic arm is often relied upon to adjust the gear's posture in real time during the gripping process. However, the robotic arm's movements are extremely complex and require high precision, especially in the positioning of multiple gears, where the coordinated operation of multiple degrees of freedom is needed to achieve subtle angle corrections. This not only increases the complexity of the control system but also prolongs the cycle time and reduces overall production efficiency.

[0003] To avoid the inability to process gears due to inaccurate posture during machining, and to avoid problems such as excessive movements, complex paths, and response delays during the posture adjustment process of the robot, it is necessary to pre-position the gears before the robot picks them up and places them on the machining platform. This allows the robot to move the gears, which are already in the correct machining posture, to the machine tool without performing complex rotation or fine-tuning movements. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning fixture for gear processing. The gear is initially corrected in posture by the gear mold fixture, and then the robot moves the gear to the machine tool in the correct processing posture by a simple basic path such as "descending-clamping-rising-translating-descending". This not only greatly simplifies the motion control of the robot and improves the clamping success rate, but also enhances the stability and automation of the production line.

[0005] To achieve the above objectives, the present invention proposes the following technical solution:

[0006] A positioning fixture for gear machining, comprising:

[0007] A tooth mold fixture, the upper part of which is provided with a positioning structure for accommodating and positioning the tooth blank;

[0008] A rotating device is located at the bottom of the tooth mold fixture and is used to drive the tooth mold fixture to rotate;

[0009] A detection device is located on the periphery of the tooth mold fixture and is used to detect whether the tooth blank matches the tooth mold fixture.

[0010] As a preferred technical solution of this utility model, the tooth mold inspection tool includes a base and at least two sets of positioning structures arranged in a ring on the upper surface of the base. Each set of positioning structures includes multiple spaced ribs, and a groove for accommodating the teeth of the tooth blank is formed between adjacent ribs.

[0011] As a preferred embodiment of this utility model, the positioning structure consists of three groups, evenly distributed on the upper surface of the base.

[0012] As a preferred embodiment of this utility model, the detection device is an infrared detection device, which includes an infrared sensor transmitter and receiver symmetrically arranged on both sides of the dental mold fixture.

[0013] As a preferred embodiment of the present invention, the detection device further includes a pair of mounting plates, which are symmetrically arranged on the periphery of the dental mold and have opposite surfaces.

[0014] The transmitter and receiver of the infrared beam sensor are respectively disposed on the surface of the mounting plate facing the dental mold fixture.

[0015] As a preferred embodiment of this utility model, the rotating device includes a drive motor and an origin sensor, and the output shaft of the drive motor is connected to the central shaft of the base of the tooth mold fixture through a coupling;

[0016] The origin sensor is used to detect the initial position of the base.

[0017] As can be seen from the above technical solutions, the present invention provides a positioning device for gear processing. Through the coordinated operation of the gear mold, the rotating device, and the detection device, it achieves automatic identification and correction of the gear's posture before processing, and has the following beneficial effects:

[0018] 1. Significantly improves the accuracy and success rate of gear blank clamping. By combining infrared detection with rotational adjustment, it ensures that only gear blanks in the correct machining posture are transferred to the machine tool, effectively avoiding machining errors and equipment alarms.

[0019] 2. It significantly simplifies the motion path and control logic of the robotic arm. The robotic arm only needs to perform simple pick-up, place-up and translation operations, without the need for complex position and angle adjustments, thereby improving production cycle time and equipment operation stability.

[0020] 3. The tooth mold inspection fixture has a simple and reliable structure, high positioning accuracy, and the rotating device is directly driven by the drive motor and coupling. It has fast response and accurate reset. The whole system is easy to implement and maintain, and is suitable for high-cycle automated production lines.

[0021] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered as part of the utility model subject matter of this disclosure, provided that such concepts do not contradict each other.

[0022] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0023] The accompanying drawings are not drawn to scale according to a true reference numeral. In the drawings, each identical or nearly identical component shown in the various figures can be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0024] Figure 1 This is a side view of the positioning device for gear processing according to the present invention.

[0025] Figure 2 This is a top view of the tooth mold inspection tool of this utility model.

[0026] 1. Tooth mold inspection tool; 101. Base; 102. Positioning structure; 1021. Rib; 1022. Slot; 2. Rotation device; 3. Mounting plate; 4. Infrared detection device. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.

[0028] The terms "first," "second," and similar words used in this utility model patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] This invention addresses the problems of inaccurate gear orientation during machining, which prevents processing, and the issues of excessive and complex movements and response delays in robot arm posture adjustment. It provides a gear machining positioning fixture by placing a gear mold fixture between the loading area and the machining area. The robot arm first picks up the gear from the loading area and places it on the gear mold fixture, which then pre-positions the gear. Only when the gear and the gear mold fixture are accurately positioned or perfectly aligned is the gear in the correct machining posture considered to be in the correct orientation. The robot arm then moves the gear to the machine tool for machining using simple gripping and translation movements. This significantly simplifies the robot arm's motion control, improves the clamping success rate, and enhances the stability and automation of the production line.

[0030] Specifically, such as Figure 1 As shown, the gear processing positioning fixture of this utility model includes a gear mold fixture 1, a rotating device 2, and a detection device. The gear mold fixture 1 is used to detect whether the posture of the gear blank or gear semi-finished product is correct. The rotating device is used to adjust the direction of the gear mold fixture 1 so that the gear blank matches the gear mold fixture. Then the gear mold fixture 1 is reset, thereby adjusting the gear blank to the correct processing posture. The detection device is used to detect whether the gear blank matches the gear mold fixture 1.

[0031] The gear mold fixture 1 is positioned between the gear blank loading area and the machine tool processing area. Its upper surface has a positioning structure that matches the tooth profile of the target gear. The initial position of the gear mold fixture 1 and the positioning structure on its surface work together to ensure that only gear blanks that match it are in the correct processing posture. A robotic arm picks up the gear blank from the loading area and places it on the gear mold fixture 1. After adjusting and positioning the gear blank on the gear mold fixture 1, the robotic arm picks it up from the gear mold fixture 1 and transfers it to the processing fixture in the machine tool processing area. If the teeth of the gear blank perfectly match the positioning structure on the gear mold fixture 1, the height of a certain part of the gear blank (such as the height of its top surface) will be flush with the preset target height. If they do not match, the bottom of the gear blank will be located on the top surface of the positioning structure because it cannot be inserted into the slot, causing the top surface of the gear blank to exceed the preset target height. In this case, it indicates that the gear blank is not in the correct processing posture and needs adjustment.

[0032] The gear mold fixture 1 includes a base 101 and at least two sets of positioning structures 102, preferably three sets. The top surface of the base 101 is a circular planar structure to fit the surface of the gear blank; for example... Figure 2 As shown, three sets of positioning structures 102 are evenly arranged in a ring on the top surface of the base 101. Each set of positioning structures 102 is formed by multiple ribs 1021 spaced apart. The ribs 1021 are made of high-strength alloy steel, and a groove 1022 is formed between adjacent ribs 1021. Preferably, three ribs 1021 are spaced apart to form two grooves 1022. The ribs 1021 protrude from the surface of the base 101. Therefore, when the teeth of the tooth blank do not fall into the groove 1022, but are located on the top surface of the rib 1021, the bottom surface of the tooth blank is equivalent to being placed on the rib 1021. The top surface of the rib 1021 exceeds the preset target height; only when the teeth of the tooth blank fall into the slot 1022 can the bottom surface of the tooth blank be in contact with the top surface of the base 101, and only then will the height of the tooth blank match the preset target height. Therefore, the tooth blank is judged to be adjusted to the correct processing posture by whether the tooth blank and the tooth mold 1 match. Only after the tooth blank is adjusted to the correct processing posture can the robot arm pick up the tooth blank that is in the correct processing posture from the tooth mold 1 and put it into the processing fixture in the machine tool processing area for further processing.

[0033] If the tooth blank does not match the tooth mold fixture, in order to adjust the tooth blank to match the tooth mold fixture 1, a rotating device 2 is set at the bottom of the base 101 for rotating or resetting the base 101. The rotating device 2 drives the base 101 to rotate while the tooth blank remains relatively stationary. When the base 101 rotates to a certain angle, the teeth of the tooth blank can fall into the slot 1022 because they coincide with the slot 1022. At this time, the height of the top surface of the tooth blank meets the preset target height. Then, the rotating device 2 resets the tooth mold fixture 1, thus completing the posture adjustment of the tooth blank. At this time, the robot can pick up the tooth blank.

[0034] Specifically, the rotating device 2 includes a drive motor, a coupling, and a slewing bearing assembly. The output shaft of the drive motor is connected to the central shaft at the bottom of the base 101 of the gear mold fixture 1 via the coupling. The bottom of the base 101 is mounted on a fixed bracket via a set of angular contact ball bearings or a slewing bearing to ensure stable load-bearing and precise rotation. When the drive motor rotates, it directly drives the base 101 to rotate via the coupling. During reset, the drive motor rotates in the opposite direction to the initial angular position set in the program, based on encoder feedback or a signal from a home sensor such as a photoelectric sensor, thereby achieving precise reset of the gear mold fixture 1. Preferably, the drive motor is a stepper motor or a servo motor.

[0035] To measure the height of the tooth blank on the tooth mold fixture 1, a detection device is set on the periphery of the tooth mold fixture 1. The detection device includes a pair of mounting plates 3 and an infrared detection device 4. The pair of mounting plates are symmetrically arranged on the periphery of the tooth mold fixture 1, and their surfaces face each other. The infrared detection device 4 uses a through-beam or reflective sensor, preferably a through-beam sensor. It includes an infrared sensor transmitter and a receiver, which are respectively mounted on the surface of the mounting plate 3 facing the tooth mold fixture 1. The transmitter emits infrared rays, which are received by the receiver. The horizontal height of the infrared emission of the infrared detection device 4 is used as the preset target height. When the height of the tooth blank is abnormal, the transmission path of the infrared rays is blocked by the tooth blank, and the infrared rays cannot be transmitted to the receiver on the other side. The infrared detection device sends a signal, and the rotating device at the bottom of the base 101 is activated, so that the tooth mold fixture 1 rotates gradually clockwise or counterclockwise. Since the tooth blank remains stationary, the teeth will gradually align with the slot 1022 during the rotation and eventually embed into it, so that the height of the tooth blank drops to the predetermined position. The infrared detection device stops the alarm. Then the rotating device 2 resets the base 101, thereby driving the tooth blank on the base 101 to rotate to the preset correct posture, completing the tooth blank posture adjustment.

[0036] The rotation step angle of the gear mold 1 can be set according to the number of teeth of the gear to ensure accurate positioning of the gear blank within the shortest rotation cycle.

[0037] To further enhance the automation and reliability of the positioning process based on the above embodiments, this invention can preferably be equipped with a control system to coordinate the actions of the robot arm, rotating device, and detection device. This control system can be a commonly used industrial PLC programmable logic controller, such as the Siemens S7-1200 series, or an embedded microcontroller, such as the STM32 series. It connects to the robot arm controller, drive motor controller, and infrared sensor signal output terminals via digital I / O modules or a fieldbus. The specific control process is as follows:

[0038] When the infrared detection device detects that the blank height exceeds the preset target height value and outputs a signal, this signal is transmitted to the input port of the PLC. The PLC determines, according to the preset program, that rotation adjustment needs to be initiated, and then sends a pulse direction signal to the driver of the drive motor, such as the DM542 stepper motor driver, through its output port, controlling the drive motor to rotate at a set step angle. During rotation, the PLC monitors the infrared signal status in real time. Once the blank height is normal and the infrared signal is restored, the PLC controls the motor to stop rotating in the opposite direction to the initial zero position. Reset can be achieved through feedback from the motor encoder or origin sensor. Finally, a "positioned and ready to grip" signal is sent to the robot controller. The entire control process requires no manual intervention, achieving fully automated collaborative operation of blank posture recognition, adjustment, and gripping / transfer.

[0039] It should be noted that the control system and the electronic reset method are preferred embodiments of this utility model. The core of protection of this utility model lies in the mechanical structure and cooperative relationship of the tooth mold fixture, the rotating device and the detection device. It does not depend on a specific control method and can also achieve basic functions through manual or mechanical structure.

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A positioning gauge for gear machining, characterized in that, include: The tooth mold fixture (1) has a positioning structure (102) on its upper part for accommodating and positioning the tooth blank. A rotating device (2) is provided at the bottom of the tooth mold (1) and is used to drive the tooth mold (1) to rotate; The detection device is located on the periphery of the tooth mold (1) and is used to detect whether the tooth blank matches the tooth mold (1).

2. The positioning fixture for gear machining according to claim 1, characterized in that, The tooth mold fixture (1) includes a base (101) and at least two sets of positioning structures (102) arranged around the upper surface of the base (101). Each set of positioning structures (102) includes multiple spaced ribs (1021), and a groove (1022) is formed between adjacent ribs (1021) to accommodate the teeth of the tooth blank.

3. The positioning fixture for gear machining according to claim 2, characterized in that, The positioning structure (102) consists of 3 groups, which are evenly distributed on the upper surface of the base (101).

4. The positioning fixture for gear machining according to claim 1, characterized in that, The detection device is an infrared detection device (4), which includes the transmitting end and receiving end of an infrared sensor symmetrically arranged on both sides of the dental mold (1).

5. The positioning fixture for gear machining according to claim 4, characterized in that, The detection device also includes a pair of mounting plates (3), which are symmetrically arranged on the periphery of the tooth mold (1) and have opposite surfaces; The transmitter and receiver of the infrared sensor are respectively disposed on the surface of the mounting plate (3) facing the dental mold (1).

6. The positioning fixture for gear machining according to claim 1, characterized in that, The rotating device (2) includes a drive motor and an origin sensor. The output shaft of the drive motor is connected to the central shaft of the base (101) of the tooth mold fixture (1) via a coupling. The origin sensor is used to detect the initial position of the base (101).

Images