A processing tool and method for a small composite rudder integral forming framework

Abstract

The present application relates to the processing tool and processing method of the whole forming framework of rudder, in particular to a kind of processing tool and processing method of small composite rudder whole forming framework, for solving the multiple problems such as the deficiency of the processing method of small composite rudder whole forming framework, benchmark is not accurate, processing precision is poor and production efficiency is low.The processing tool of small composite rudder whole forming framework, including upper die, lower die, multiple positioning pins and positioning benchmark component;Through the cooperation of upper die, lower die and multiple positioning pins, the accurate positioning of the outer reference surface of preform in the early stage of processing is ensured;And the design of feeding screw and distance measuring surface makes that inner reference surface can be accurately measured and positioned, avoids the processing error caused by inaccurate inner reference surface position.

Description

TECHNICAL FIELD

[0001] The present application relates to a processing tool and method for a rudder integral forming framework, in particular to a processing tool and method for a small composite rudder integral forming framework. BACKGROUND

[0002] Small composite rudder integral forming frameworks are widely used in aerospace, marine and other fields. Due to their high strength, light weight and simple assembly, they are particularly suitable for use in situations where structural performance is strictly required. Compared with traditional split frameworks, integral forming composite frameworks have significant advantages in improving structural strength, shortening production cycle and simplifying assembly. However, the processing of integral forming composite frameworks faces great challenges, especially in the determination of processing reference and the control of processing precision.

[0003] In the current processing technology, numerical control milling technology is often used. However, since the inner reference surface of the small composite rudder integral forming framework serves as the shaping reference surface, the processing space is small, which makes it difficult for the tool and the measurement probe to enter smoothly, making it difficult to accurately determine the processing reference. The traditional method is to indirectly determine the reference surface by positioning the outer surface of the tool, and then adjusting it by repeated trial cutting and theoretical calculation. This method not only has low efficiency, but also causes processing errors due to the possible deformation of the reference surface, further affecting the processing precision and product quality.

[0004] In addition, the special properties of composite materials, such as low density and high hardness, make it easy for the milling cutter to cause impact on the edge of the skin during processing, which in turn causes edge damage, affecting assembly precision and the qualification rate of the final product. With the advancement of mass production of products, the low efficiency and high risk of traditional processing methods are increasingly prominent, and cannot meet the needs of mass production.

[0005] In summary, the processing method of small composite rudder integral forming frameworks faces multiple problems such as inaccurate reference, poor processing precision and low production efficiency. In order to improve processing efficiency, reduce processing risk and ensure the quality of the final product, it is necessary to find more efficient and accurate processing technology to meet the growing production needs. SUMMARY

[0006] The purpose of the present application is to solve the problems of inaccurate reference, poor processing precision and low production efficiency in the processing method of small composite rudder integral forming frameworks, and to provide a processing tool and method for a small composite rudder integral forming framework.

[0007] In order to solve the above-mentioned deficiencies of the prior art, the present application provides the following technical solutions:

[0008] A kind of processing tool of small composite rudder class integral forming framework, including upper die, lower die, the upper die, lower die form forming cavity between, forming cavity is used to prepare preform;

[0009] It is special in that: it further includes positioning reference assembly, A positioning pins, A≥2;

[0010] The upper die, lower die are provided with A first positioning holes, and the A first positioning holes are used to process A second positioning holes on the preform;Each positioning pin is used to sequentially pass through the second positioning hole and the first positioning hole of the lower die to position the preform with the lower die;

[0011] The lower die is provided with a positioning groove, and the positioning reference assembly is used to be installed in the positioning groove to position the inner reference surface of the preform, and it includes a mounting table, B positioning reference blocks and B feed screws;B≥1;

[0012] The mounting table is provided with B installation grooves, and the B positioning reference blocks are respectively located in the B installation grooves, one side of each positioning reference block close to the inner reference surface of the preform is a distance measuring surface, the opposite side of the distance measuring surface is an inclined surface, and the distance between the distance measuring surface and the inclined surface increases from top to bottom;

[0013] The distance measuring surface is perpendicular to the top surface of the lower die, and at least one equidistance measuring rod with equal length is vertically arranged;

[0014] Each feed screw is parallel to the distance measuring surface, and the tail portion passes through the through hole on the mounting table and abuts against the inclined surface of the corresponding positioning reference block, and the feed screw is used to move downward to make the distance measuring surface close to the inner reference surface of the preform.

[0015] Further, the mounting table includes a body and a pressing plate fixed to the top surface of the body;The B installation grooves are arranged on the body and open upward.

[0016] Further, the outer end of each equidistance measuring rod is in the shape of a ball head.

[0017] Further, the B value is 2;The body is in the shape of a mountain, and the pressing plate is fixed to the top surface of the body by three bolts.

[0018] A processing method of small composite rudder class integral forming framework, which is special in that: the processing tool of small composite rudder class integral forming framework is used, including the following steps:

[0019] Step 1, preparing a preform in the forming cavity, when the preform reaches the demoulding density, processing A second positioning holes on the preform through A first positioning holes on the upper die and the lower die;

[0020] Step 2, when the preform reaches the processing density, the preform is placed on the lower mold, and A positioning pins are sequentially inserted through the second positioning hole and the first positioning hole of the lower mold to position the preform with the lower mold as the outer shape rough reference;

[0021] Step 3, determine the inner reference surface and the outer reference surface of the preform;

[0022] Step 4, place the mounting table into the positioning groove, and place B positioning reference blocks into B mounting slots respectively, then parallel the distance measuring surface of each feed screw to the inclined surface of the corresponding positioning reference block through the through hole on the mounting table, and then rotate the B feed screws to make the distance measuring surface close to the inner reference surface of the preform until all the equidistant measuring rods are in full contact with the inner reference surface of the preform;

[0023] Step 5, calculate the position of the inner reference surface of the preform according to the distance measuring surface, process the inner reference surface of the preform, and then process the outer reference surface to complete the processing of the small composite rudder integral forming framework.

[0024] Compared with the prior art, the beneficial effects of the present application are:

[0025] (1) The processing tool of the small composite rudder integral forming framework of the present application comprises an upper mold, a lower mold, a plurality of positioning pins and a positioning reference assembly. The cooperation of the upper mold, the lower mold and the plurality of positioning pins ensures the accurate positioning of the outer reference surface of the preform at the initial stage of processing. The design of the feed screw and the distance measuring surface enables the inner reference surface to be accurately measured and positioned, avoiding the processing errors caused by inaccurate inner reference surface position.

[0026] (2) The design of the point contact between the spherical head-shaped outer end of the equidistant measuring rod and the inner reference surface of the preform can effectively avoid the influence of residual threads on positioning accuracy, reduce the risks caused by deformation, damage or unstable reference surface during processing, and thus ensure the processing quality.

[0027] (3) The present application has strong adaptability and can support various reference surface adjustments and positioning to meet the processing needs of composite frameworks of different shapes and sizes, and can meet the batch production needs. The processing tool realizes, shapes, processes and molds in an integrated manner.

[0028] (4) The processing method of the small composite rudder integral forming framework of the present application sequentially processes the preform preparation and positioning hole, the outer shape rough reference positioning, the inner and outer reference surface determination, and the inner reference surface measurement, solves the problems of inaccurate reference surface positioning and poor processing precision in the processing of small composite rudder integral forming framework, reduces the trial cutting time, reduces the processing risk, simplifies the processing process, meets the large-scale production needs, optimizes the production cost and quality, and has obvious technical and economic advantages. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the processing tool embodiment of a small composite rudder integral forming framework of the application and the structure schematic diagram of the preform;

[0030] Figure 2 It is the structure schematic diagram of the positioning reference assembly installed in the positioning groove in the embodiment of the application (the preform is not shown);

[0031] Figure 3 It is the structure schematic diagram of the body in the embodiment of the application;

[0032] Figure 4 It is the structure schematic diagram of the pressing plate in the embodiment of the application;

[0033] Figure 5 It is the structure schematic diagram of the positioning reference block and the equidistance measuring rod in the embodiment of the application;

[0034] Figure 6 It is the structure schematic diagram of step 4 of the processing method embodiment of a small composite rudder integral forming framework of the application;

[0035] Figure 7 It is the principle schematic diagram of step 4 in the embodiment of the application for making the distance measuring surface close to the inner reference surface of the preform.

[0036] The reference signs are explained as follows: 01-preform;02-inner reference surface;03-outer reference surface;04-residual thread;100-upper die;200-lower die;310-positioning pin;320-first positioning hole;330-second positioning hole;400-positioning reference assembly;410-mounting table;411-mounting groove;412-body;413-pressing plate;420-positioning reference block;421-distance measuring surface;422-inclined surface;430-feed screw;440-equidistance measuring rod. DETAILED DESCRIPTION

[0037] The application will be further explained in combination with the drawings and exemplary embodiments.

[0038] Referring to Figures 1-5 A processing tool of a small composite rudder integral forming framework, comprising an upper die 100, a lower die 200, A positioning pins 310, a positioning reference assembly 400;A≥2;In this embodiment, A=2.

[0039] Referring to Figure 1 The upper die 100 and the lower die 200 form a forming cavity therebetween, and the forming cavity is used for preparing a preform 01.

[0040] The upper die 100 and the lower die 200 are each provided with two first positioning holes 320, and the two first positioning holes 320 are used for machining two second positioning holes 330 on the preform 01; each positioning pin 310 is used for sequentially penetrating through the second positioning hole 330 and the first positioning hole 320 of the lower die 200, so as to position the preform 01 and the lower die 200.

[0041] With reference to Figures 2-5 The lower die 200 is provided with a positioning groove, and the positioning reference assembly 400 is used for being installed in the positioning groove to position the inner reference surface 02 of the preform 01, and the positioning reference assembly 400 comprises a mounting table 410, B positioning reference blocks 420 and B feed screws 430; B≥1; in the embodiment, B=2.

[0042] The mounting table 410 comprises a body 412 and a pressing plate 413; the body 412 is in a mountain shape, and the body 412 is provided with two mounting grooves 411 opening upward; and the pressing plate 413 is fixed on the top surface of the body 412 through three bolts.

[0043] The two positioning reference blocks 420 are respectively located in the two mounting grooves 411, and one side of each positioning reference block 420 close to the inner reference surface 02 of the preform 01 is a distance measuring surface 421, the opposite side of the distance measuring surface 421 is an inclined surface 422, and the distance between the distance measuring surface 421 and the inclined surface 422 increases from top to bottom;

[0044] The distance measuring surface 421 is perpendicular to the top surface of the lower die 200, and four equidistant measuring rods 440 with equal lengths are vertically arranged on the distance measuring surface 421; the outer end of each equidistant measuring rod 440 is in a spherical shape; the reason is that the preform 01 is formed by fiber sewing, and after the inner reference surface 02 is demolded, there is a residual thread 04 perpendicular to the distance measuring surface 421; the spherical outer end can ensure that the contact between the equidistant measuring rod 440 and the inner reference surface 02 of the preform 01 is point contact, so as to effectively avoid the influence of the thread on the positioning of the equidistant measuring rod 440.

[0045] Each feed screw 430 is parallel to the distance measuring surface 421, the tail portion penetrates through a through hole in the pressing plate 413, and then abuts against the inclined surface 422 of the corresponding positioning reference block 420; the downward movement of the feed screw 430 can make the distance measuring surface 421 close to the inner reference surface 02 of the preform 01.

[0046] A processing method of a small composite rudder integral forming framework, which adopts the processing tooling of the small composite rudder integral forming framework, and comprises the following steps:

[0047] Step 1: preparing a preform 01 in a forming cavity; the preform 01 is formed by fiber sewing, and when the preform 01 reaches the demolding density, two second positioning holes 330 are machined on the preform 01 through two first positioning holes 320 on the upper die 100 and the lower die 200;

[0048] Step 2, when the preform 01 reaches the processing density, the preform 01 is taken out of the forming cavity and placed on the lower mold 200, the two positioning pins 310 are sequentially inserted through the second positioning hole 330 and the first positioning hole 320 of the lower mold 200, so that the preform 01 is positioned with the lower mold 200 as the outer shape rough reference;

[0049] Step 3, the inner reference surface 02 of the preform 01 is determined as the rudder shaft mounting surface, and the outer reference surface 03 is determined as the flange mounting surface;

[0050] Step 4, referring to Figures 6-7 The mounting table 410 is placed in the positioning groove, and the two positioning reference blocks 420 are respectively placed in the two mounting grooves 411, the pressing plate 413 is fixed on the top surface of the body 412 through three bolts, each feeding screw 430 is parallel to the distance measuring surface 421, the tail is inserted through the through hole on the pressing plate 413 and abuts against the inclined surface 422 of the corresponding positioning reference block 420, then the distance measuring surface 421 is close to the inner reference surface 02 of the preform 01 by rotating the two feeding screws 430, until all the equidistant measuring rods 440 are in full contact with the inner reference surface 02 of the preform 01;

[0051] Step 5, the position of the inner reference surface 02 of the preform 01 is calculated according to the distance measuring surface 421, the inner reference surface 02 of the preform 01 is processed, and then the outer reference surface 03 is processed based on the inner reference surface 02, thereby completing the processing of the small composite rudder overall forming framework.

Claims

1. A processing tool for small composite rudder integral forming framework, comprising an upper die (100) and a lower die (200), a forming cavity is formed between the upper die (100) and the lower die (200), and the forming cavity is used for preparing a preform (01); characterized in that It also includes a positioning reference assembly (400) and A positioning pins (310), A≥2; The upper die (100) and the lower die (200) are each provided with A first positioning holes (320), and the A first positioning holes (320) are used for machining A second positioning holes (330) on the preform (01); each positioning pin (310) is used for sequentially penetrating through the second positioning hole (330) and the first positioning hole (320) of the lower die (200) to position the preform (01) and the lower die (200); The lower die (200) is provided with a positioning groove, and the positioning reference assembly (400) is used for mounting in the positioning groove to position an inner reference surface (02) of the preform (01), and the positioning reference assembly (400) comprises a mounting table (410), B positioning reference blocks (420) and B feed screws (430); B≥1; The mounting table (410) is provided with B mounting grooves (411), and the B positioning reference blocks (420) are respectively located in the B mounting grooves (411); one side of each positioning reference block (420) close to the inner reference surface (02) of the preform (01) is a distance measuring surface (421), the opposite side of the distance measuring surface (421) is an inclined surface (422), and the distance between the distance measuring surface (421) and the inclined surface (422) increases from top to bottom; The distance measuring surface (421) is perpendicular to the top surface of the lower die (200), and at least one equidistant measuring rod (440) with equal length is vertically arranged on the distance measuring surface (421); Each feed screw (430) is parallel to the distance measuring surface (421), the tail part penetrates through a through hole on the mounting table (410) and abuts against the inclined surface (422) of the corresponding positioning reference block (420), and the feed screw (430) is used for moving downward to make the distance measuring surface (421) close to the inner reference surface (02) of the preform (01).

2. The processing tool for small composite rudder integral forming framework according to claim 1, characterized in that: The mounting table (410) comprises a body (412) and a pressing plate (413) fixed on the top surface of the body (412); and the body (412) is provided with the B mounting grooves (411) opening upward.

3. The processing tool for small composite rudder integral forming framework according to claim 1, characterized in that: The outer end of each equidistant measuring rod (440) is in the shape of a ball head.

4. The processing tool for small composite rudder integral forming framework according to claim 2, characterized in that: The value of B is 2; the body (412) is in the shape of a mountain, and the pressing plate (413) is fixed on the top surface of the body (412) by three bolts.

5. A method for processing a small-sized composite rudder integral forming skeleton, characterized in that: The processing tool for small composite rudder integral forming framework according to claim 1 comprises the following steps: Step 1, a preform (01) is prepared in a forming cavity, when the preform (01) reaches the demolding density, A second positioning holes (330) are machined on the preform (01) through A first positioning holes (320) on the upper die (100) and the lower die (200); Step 2, when the preform (01) reaches the processing density, it is placed on the lower die (200), A positioning pins (310) are sequentially inserted through the second positioning holes (330) and the first positioning holes (320) of the lower die (200), so that the preform (01) is positioned with the lower die (200) as the outer shape rough reference; Step 3, the inner reference surface (02) and the outer reference surface (03) of the preform (01) are determined; Step 4, the mounting table (410) is placed in the positioning groove, B positioning reference blocks (420) are respectively placed in B mounting grooves (411), each feeding screw (430) is parallel to the distance measuring surface (421), the tail passes through the through hole on the mounting table (410) and abuts against the inclined surface (422) of the corresponding positioning reference block (420), then the distance measuring surface (421) is close to the inner reference surface (02) of the preform (01) by rotating B feeding screws (430), until all the equidistant measuring rods (440) are in full contact with the inner reference surface (02) of the preform (01); Step 5, the position of the inner reference surface (02) of the preform (01) is calculated according to the distance measuring surface (421), the inner reference surface (02) of the preform (01) is processed, and then the outer reference surface (03) is processed based on the inner reference surface (02), thereby completing the processing of the small composite rudder overall forming framework.

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