A precision grinding and polishing machine for a right-angle protractor and a design method thereof

Abstract

The present application relates to a kind of precision grinding polishing machine tool of right angle gauge, including base, the top of base is equipped with X-Y axis moving module, the X-Y axis moving module is connected with slide, slide is equipped with clamp for clamping right angle gauge;The rear end of the top of base is fixed with gantry, Z-axis moving module is equipped on gantry, Z-axis moving module is connected with the electric spindle being arranged along vertical direction, and the output end of electric spindle is connected with precision grinding tool.The clamp in the present application adopts the upper and lower clamping surface of L type to jointly act and compress the right angle gauge to be processed, and clamping is reliable;The present application introduces the method of forward design-from top to bottom, simultaneously introduces Petri net theory to solve the resource scheduling problem in design process, in combination with modeling technology, a kind of design method of new L type right angle gauge polishing machine tool is proposed, improves the design efficiency of special processing equipment, reduces design cost, optimizes design scheme.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool technology, specifically to a precision grinding machine tool for right-angle measuring tools and its design method. Background Technology

[0002] High-precision right-angle measuring tools are important accuracy testing tools, characterized by high precision, corrosion resistance, and wear resistance. Although China's measuring instrument industry has made some technological progress, a gap still exists between it and foreign products in the high-end market. Foreign companies or multinational corporations still occupy 70%-80% of the domestic market share. Therefore, China's measuring instrument industry still faces challenges in technological upgrading and market expansion. Designing a dedicated right-angle measuring tool grinding device is essential. With the development of high-end manufacturing, the design cycle of high-precision product processing equipment is shortening, making it particularly important to improve the design efficiency of processing equipment. Digital analysis and optimization technology is typically used when designing high-precision processing equipment. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a precision grinding machine tool for right-angle measuring tools and its design method.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A precision grinding machine for right-angle measuring tools includes a base, an XY-axis moving module on the top of the base, a slide connected to the XY-axis moving module, and a clamp for holding the right-angle measuring tool on the slide.

[0006] A gantry frame is fixed to the rear end of the top of the base. A Z-axis moving module is provided on the gantry frame. An electric spindle is connected to the Z-axis moving module and is arranged in the vertical direction. A precision grinding tool is connected to the output end of the electric spindle.

[0007] The fixture includes an L-shaped base plate, a pressure plate, and a top plate. The top of the base plate has protruding limiting platforms at both ends, forming a positioning groove between the two limiting platforms and the top of the base for placing the right-angle measuring tool to be processed. Multiple vacuum suction cups are embedded at intervals on the bottom surface of the positioning groove, and the bottom of each vacuum suction cup is connected to a vacuum generator. Support blocks are fixed to the top of the two limiting platforms, and the top plate is fixed to the two support blocks at both ends. Vertically arranged guide rods are fixed between the two support blocks and the top plate. The pressure plate is located between the base and the top plate, and its two ends are slidably sleeved onto the two guide rods. Return springs sleeved on the guide rods connect the top plate and the support blocks. A downward pressure driver is connected to the top plate, with its lower end abutting against the top surface of the pressure plate. The downward pressure driver drives the pressure plate downward to press the right-angle measuring tool to be processed.

[0008] Furthermore, it employs a PLC controller for overall machine control.

[0009] Furthermore, the downward drive is a thrust threaded rod threadedly connected to the top plate.

[0010] This invention discloses a design method for a precision grinding machine for right-angle measuring tools, the design method comprising the following steps:

[0011] 1) First stage: Workpiece-dedicated processing equipment whole machine scheme stage. Based on the information of the workpiece and the processing requirements, design the whole machine model of the dedicated processing equipment, preliminarily determine the dimensional parameters of key parts, establish a three-dimensional model in the CAD environment, and use the three-dimensional model to obtain initial parameters as boundary conditions and constraints for the next stage of design optimization.

[0012] 2) Second stage: Overall scheme - structural design stage. Based on the initial conditions of the first stage, an optimization controller is designed and established, with the initial parameters set as boundary conditions and the requirements as the optimization target. It is responsible for controlling CAD modeling - CAE performance evaluation - CAD remodeling. Among them, CAE performance evaluation includes extracting information from the 3D model established in the first stage and analyzing the information to organize it into a feature model. CAE software is used to analyze the information, obtain the model analysis results, and establish the overall structure.

[0013] 3) The third stage: overall structure - actual machine verification and analysis stage. After the optimization design in the second stage, the overall machine performance is checked, weak links are corrected, and the final result is verified by actual machine assembly to check whether it meets the requirements.

[0014] Furthermore, in the first stage, a Petri net model is established. This first-stage Petri net model includes 11 locations and 8 transitions.

[0015] The 11 databases are: workpiece information and processing requirements; processing technology requirements; workpiece information; process function requirements; process parameter information; motion function model; support structure layout model; structural parameter information; structural model; technical indicator information; and complete machine solution for special processing equipment.

[0016] The eight transitions are: analyzing workpiece information and processing requirements; processing technology design and analysis; functional planning and layout; structural planning and layout; topology model building; equipment structural parameter analysis; dimensional analysis and design; and integrating process parameters and model determination scheme.

[0017] Furthermore, in the second and third phases, Petri net models are established, which include 15 locations and 14 transitions.

[0018] in,

[0019] The 15 libraries are: initial assembly model; functional component requirements information; structural component requirements information; functional component performance analysis results; structural component feature information and information required for CAE simulation; functional component information; finite element model results; functional component 3D model; structural component 3D model; complete machine 3D model; updated attribute information of structural components; target difference set; approximate 3D model; complete machine simulation model; and complete machine information.

[0020] The 14 transitions are as follows: classifying undefined structures in the overall machine model; performance analysis of functional components; initial setup of the CAE environment; construction of 3D models of functional components; optimization of the 3D model; establishment of an overall 3D model to meet design requirements; reasonable improvement of structural components that do not meet design requirements; calculation of target differences; approximate model building; updating structural component information; reasonable optimization; finite element analysis of the entire machine; and acceptance testing.

[0021] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0022] 1. The fixture in this invention uses an L-shaped upper and lower clamping surfaces to press and position the right-angle measuring tool to be processed, ensuring reliable clamping;

[0023] 2. This invention introduces the forward design-top-down (TOP-DOWN) method and uses Petri net theory to solve the resource scheduling problem in the design process. Combined with modeling technology, it proposes a new design method for L-shaped right-angle measuring tool grinding machine, which improves the design efficiency of special processing equipment, reduces design costs, and optimizes the design scheme. Attached Figure Description

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] Figure 1 This is a schematic diagram of the precision grinding machine tool for the right-angle measuring tool of the present invention;

[0026] Figure 2 This is a schematic diagram of the fixture's structure;

[0027] Figure 3 This is the front view of the fixture;

[0028] Figure 4 This is a schematic diagram of the base plate structure;

[0029] Figure 5 This is a flowchart illustrating the forward design process of the design method of this invention.

[0030] Figure 6 This is a diagram of the first-stage Petri net model;

[0031] Figure 7The diagram shows the Petri net model for the second and third stages;

[0032] Figure 8 This is a Petri net model diagram of the entire design process. Detailed Implementation

[0033] like Figure 1-4 As shown, the present invention provides a precision grinding machine for right-angle measuring tools, including a base 1 (made of marble), shock absorbers 2 are provided at the four corners of the bottom of the base 1, and an XY axis moving module 3 is provided at the top of the base 1. A slide 4 is connected to the XY axis moving module 3, and a clamp 5 for holding the right-angle measuring tool is provided on the slide 4.

[0034] A gantry frame 6 is fixed to the rear end of the top of the base 1. A Z-axis moving module 7 is provided on the gantry frame 6. An electric spindle 8 is connected to the Z-axis moving module 7 and is arranged in the vertical direction.

[0035] The output end of the electric spindle 8 is connected to a fine grinding tool 9;

[0036] The XY-axis moving module 3 and Z-axis moving module 7 in this invention adopt the lead screw and nut pair (driven by a motor) commonly used in existing CNC machine tools, and the specific structure will not be described in detail. The Z-axis moving module 7 is used to drive the fine grinding tool 9 on the electric spindle 8 to move in the vertical direction, and the XY-axis moving module 3 is used to drive the fixture to move in the horizontal plane.

[0037] The fixture 5 includes an L-shaped base plate 51, a pressure plate 52, and a top plate 53. The top of the base plate 51 has protruding limiting platforms 511 at both ends. A positioning groove 512 for placing a right-angle measuring tool to be processed is formed between the two limiting platforms 511 and the top of the base 1. Multiple vacuum suction cups 54 are embedded at intervals on the bottom surface of the positioning groove 512, and the bottom of each vacuum suction cup 54 is connected to a vacuum generator. Support blocks 55 are fixed to the top of the two limiting platforms 511, and the two ends of the top plate 53 are fixed to the two support blocks 511. On the top plate 53, two support blocks 55 and a top plate 53 are respectively fixed with guide rods 56 arranged vertically. The pressure plate 52 is located between the base 1 and the top plate 53, and both ends of the pressure plate 52 are slidably sleeved on the two guide rods 56. A return spring 57 sleeved on the guide rods 56 is connected between the top plate 53 and the support blocks 55. A downward pressure driver 58 is connected to the top plate 53. The lower end of the downward pressure driver 58 abuts against the top surface of the pressure plate 52. The downward pressure driver 58 drives the pressure plate 52 to move downward and press the right-angle measuring tool to be processed. The downward pressure driver 58 is a thrust threaded rod threadedly connected to the top plate 53.

[0038] The clamping principle of the fixture: The right-angle measuring tool to be processed is placed in the positioning groove of the base plate 51, with one end of the tool abutting against the corresponding limiting stage 511 (leaving some clearance at the other end). At this time, the vacuum generator is turned on, and the vacuum pressure is adjusted to between 0.08-0.1 MPa. The vacuum generator evacuates the air, and the vacuum suction cup 54 picks up the right-angle measuring tool. The thrust threaded rod is rotated clockwise, pushing the pressure plate 52 downwards. The pressure plate 52 clamps and fixes the right-angle measuring tool, completing the clamping action. After the fine grinding process of the right-angle measuring tool is completed, the thrust threaded rod is rotated counterclockwise. At this time, the pressure plate 52 is pushed away from the right-angle measuring tool by the return spring 57, completing the unloading action.

[0039] This precision grinding machine is controlled by a PLC controller.

[0040] like Figure 5 As shown, the present invention discloses a design method for a precision grinding machine tool for right-angle measuring tools, the design method comprising the following steps:

[0041] 1) First stage: Workpiece-dedicated processing equipment whole machine scheme stage. Based on the information of the workpiece and the processing requirements, design the whole machine model of the dedicated processing equipment, preliminarily determine the dimensional parameters of key parts, establish a three-dimensional model in the CAD environment, and use the three-dimensional model to obtain initial parameters as boundary conditions and constraints for the next stage of design optimization.

[0042] 2) Second stage: Overall scheme - structural design stage. Based on the initial conditions of the first stage, an optimization controller is designed and established, with the initial parameters set as boundary conditions and the requirements as the optimization target. It is responsible for controlling CAD modeling - CAE performance evaluation - CAD remodeling. Among them, CAE performance evaluation includes extracting information from the 3D model established in the first stage and analyzing the information to organize it into a feature model. CAE software is used to analyze the information, obtain the model analysis results, and establish the overall structure.

[0043] 3) The third stage: overall structure - actual machine verification and analysis stage. After the optimization design in the second stage, the overall machine performance is checked, weak links are corrected, and the final result is verified by actual machine assembly to check whether it meets the requirements.

[0044] like Figure 6 As shown, the first stage establishes a Petri net model, which includes 11 locations and 8 transitions.

[0045] The 11 databases are: workpiece information and processing requirements; processing technology requirements; workpiece information; process function requirements; process parameter information; motion function model; support structure layout model; structural parameter information; structural model; technical indicator information; and complete machine solution for special processing equipment.

[0046] The eight transitions are: analyzing workpiece information and processing requirements; processing technology design and analysis; functional planning and layout; structural planning and layout; topology model building; equipment structural parameter analysis; dimensional analysis and design; and integrating process parameters and model determination scheme.

[0047] right Figure 6 The definitions and statuses of each library are shown in Table 2-1. Figure 6 Each transition and state change is shown in Table 2-2.

[0048] Table 2-1 Description of Model Library Locations and Status in the First Stage of the Design Process

[0049]

[0050] Table 2-2 Information on Model Transitions and State Changes in the First Stage of the Design Process

[0051]

[0052]

[0053] As shown in Tables 2-1 and 2-2, the state of each storage facility and the transformation process of each transition in the first stage of the design are described in detail.

[0054] like Figure 7 As shown, the Petri net models are established in the second and third stages. The Petri net models in the second and third stages include 15 places and 14 transitions.

[0055] in,

[0056] The 15 libraries are: initial assembly model; functional component requirements information; structural component requirements information; functional component performance analysis results; structural component feature information and information required for CAE simulation; functional component information; finite element model results; functional component 3D model; structural component 3D model; complete machine 3D model; updated attribute information of structural components; target difference set; approximate 3D model; complete machine simulation model; and complete machine information.

[0057] The 14 transitions are as follows: classifying undefined structures in the overall machine model; performance analysis of functional components; initial setup of the CAE environment; construction of 3D models of functional components; optimization of the 3D model; establishment of an overall 3D model to meet design requirements; reasonable improvement of structural components that do not meet design requirements; calculation of target differences; approximate model building; updating structural component information; reasonable optimization; finite element analysis of the entire machine; and acceptance testing.

[0058] right Figure 7 The definitions and statuses of each library are shown in Table 2-3. Figure 7Each transition and state change is shown in Table 2-4.

[0059] Table 2-3 Description of Model Library Locations and Status in the Second and Third Stages of the Design Process

[0060]

[0061]

[0062] Table 2-4 Information on Model Transitions and State Changes in the Second and Third Stages of the Design Process

[0063]

[0064] Tables 2-3 and 2-4 describe the state of each storage facility and the transformation process of each transition in the second and third phases of the design. Figure 6 , 7 Obtain the overall Petri net model of the design scheme, such as Figure 8 As shown.

[0065] like Figure 8 As shown, Figure 8 The upper half represents the first stage, and the lower half represents the second and third stages, with starting locations P0 and P24 respectively. The established Petri net model shows that the design scheme is a progressive design process, consistent with the characteristics of product design.

[0066] The specific embodiments of the present invention have been described above. However, those skilled in the art should understand that this is merely an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principles and essence of the present invention, but all such changes and modifications fall within the protection scope of the present invention.

Claims

1. A design method for a precision grinding machine for right-angle measuring tools, characterized in that: The precision grinding machine includes a base, and an XY axis moving module is provided on the top of the base. A slide is connected to the XY axis moving module, and a clamp for holding a right-angle measuring tool is provided on the slide. A gantry frame is fixed to the rear end of the top of the base. A Z-axis moving module is provided on the gantry frame. An electric spindle is connected to the Z-axis moving module and is arranged in the vertical direction. A precision grinding tool is connected to the output end of the electric spindle. The fixture includes an L-shaped base plate, a pressure plate, and a top plate. The top of the base plate has protruding limiting platforms at both ends, forming a positioning groove between the two limiting platforms and the top of the base for placing the right-angle measuring tool to be processed. Multiple vacuum suction cups are embedded at intervals on the bottom surface of the positioning groove, and the bottom of each vacuum suction cup is connected to a vacuum generator. Support blocks are fixed to the top of the two limiting platforms, and the top plate is fixed to the two support blocks at both ends. Vertically arranged guide rods are fixed between the two support blocks and the top plate. The pressure plate is located between the base and the top plate, and its two ends are slidably sleeved onto the two guide rods. Return springs sleeved on the guide rods connect the top plate and the support blocks. A downward pressure driver is connected to the top plate, with its lower end abutting against the top surface of the pressure plate. The downward pressure driver drives the pressure plate downward to press the right-angle measuring tool to be processed. The design method includes the following steps: 1) First stage: Workpiece-dedicated processing equipment whole machine scheme stage. Based on the information of the workpiece and the processing requirements, design the whole machine model of the dedicated processing equipment, preliminarily determine the dimensional parameters of key parts, establish a three-dimensional model in the CAD environment, and use the three-dimensional model to obtain initial parameters as boundary conditions and constraints for the next stage of design optimization. 2) Second stage: Overall scheme - structural design stage. Based on the initial conditions of the first stage, an optimization controller is designed and established, with the initial parameters set as boundary conditions and the requirements as the optimization target. It is responsible for controlling CAD modeling - CAE performance evaluation - CAD remodeling. Among them, CAE performance evaluation includes extracting information from the 3D model established in the first stage and analyzing the information to organize it into a feature model. CAE software is used to analyze the information, obtain the model analysis results, and establish the overall structure. 3) Third stage: Overall structure - actual machine verification and analysis stage. After the optimization design in the second stage, the overall machine performance is checked, weak links are corrected, and the final result is verified by actual machine assembly to check whether it meets the requirements. The first stage involves establishing a Petri net model, which includes 11 locations and 8 transitions. The 11 databases are: workpiece information and processing requirements; processing technology requirements; workpiece information; process function requirements; process parameter information; motion function model; support structure layout model; structural parameter information; structural model; technical indicator information; and complete machine solution for special processing equipment. The eight transitions are: analyzing workpiece information and processing requirements; processing technology design and analysis; functional planning and layout; structural planning and layout; topology model building; equipment structural parameter analysis; dimensional analysis and design; and integrating process parameters and model to determine the solution. The second and third phases establish Petri net models, which include 15 locations and 14 transitions; among them, The 15 libraries are: initial assembly model; functional component requirements information; structural component requirements information; functional component performance analysis results; structural component feature information and information required for CAE simulation; functional component information; finite element model results; functional component 3D model; structural component 3D model; complete machine 3D model; updated attribute information of structural components; target difference set; approximate 3D model; complete machine simulation model; and complete machine information. The 14 transitions are as follows: classifying undefined structures in the overall machine model; performance analysis of functional components; initial setup of the CAE environment; construction of 3D models of functional components; optimization of the 3D model; establishment of an overall 3D model to meet design requirements; reasonable improvement of structural components that do not meet design requirements; calculation of target differences; approximate model building; updating structural component information; reasonable optimization; finite element analysis of the entire machine; and acceptance testing.

2. The design method for a precision grinding machine tool for right-angle measuring tools according to claim 1, characterized in that: It uses a PLC controller for overall machine control.

3. The design method for a precision grinding machine tool for a right-angle measuring tool according to claim 1, characterized in that: The downward actuator is a thrust threaded rod threadedly connected to the top plate.

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