Clamp of horizontal milling and turning machining device, machining device and machining method

Abstract

The invention relates to the technical field of milling and turning machining, in particular to a clamp of a horizontal milling and turning machining device, a machining center and a machining method. The invention provides a clamp of a horizontal milling and turning machining device, which comprises a mandrel and a support part, the support part is arranged on the mandrel, the support part comprises a plurality of telescopic support pieces, the plurality of support pieces are arranged at intervals along the extension direction of the mandrel, and at least one of the plurality of telescopic support pieces is set as an assembly positioning point. According to the technical scheme, all feature machining on the appearance can be completed through one-time clamping, and the product quality and the production efficiency are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of milling and turning processing, and in particular to a fixture, a machining center and a machining method of a horizontal milling and turning processing device. Background Art

[0002] As a strategic new material with excellent performance, carbon fiber has excellent properties such as low density, high strength, high modulus, and high temperature resistance. It is increasingly widely used in cutting-edge fields such as aerospace. Among them, the carbon fiber cabin has the characteristics of large cabin size, thin skin wall thickness, weak rigidity, large deformation, and poor contour; high precision requirements for part shape and position tolerances; poor part contours, difficult to ensure the processing depth of 90° countersunk holes, and a large workload for manual repair. The existing manual tooling is difficult to clamp and align, with high labor intensity and low efficiency; the cabin is large in size and requires multiple clamping and alignment, and it is difficult to ensure shape and position tolerances, low processing efficiency, and high quality and safety risks. Summary of the invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, in a first aspect of the present disclosure, a fixture for a horizontal milling and turning device is provided, comprising a mandrel and a support portion, wherein the support portion is arranged on the mandrel, wherein:

[0005] The support portion includes a plurality of telescopic support members, the plurality of support members are arranged at intervals along the extension direction of the core shaft, and at least one of the plurality of telescopic support members is set as an assembly positioning point.

[0006] In a feasible embodiment, the telescopic support member set as the assembly positioning point includes a telescopic member, a mounting member and a positioning member, the positioning member and the telescopic member are arranged on the mounting member, the telescopic member is used to support the inner wall of the workpiece to be processed, and the positioning portion is used to locate the axial position of the workpiece to be processed and the core shaft.

[0007] In a feasible embodiment, the support part includes a first telescopic support member, a second telescopic support member and a third telescopic support member, the third telescopic support member is arranged between the first telescopic support member and the second telescopic support member, the second telescopic support member is arranged as the assembly positioning point, and the second telescopic support member is arranged on the side of the core shaft close to the tailstock of the horizontal milling and turning processing device.

[0008] In a feasible implementation manner, the third telescopic support member has a plurality of telescopic support columns evenly distributed along the circumferential direction.

[0009] In a feasible implementation manner, a plurality of the telescopic support members are slidably connected to the core shaft.

[0010] In a feasible implementation, the telescopic support is configured as a synchronous self-centering motion structure.

[0011] In a feasible implementation manner, the telescopic support member is driven by pneumatic drive and / or hydraulic drive.

[0012] In a second aspect of the present disclosure, a horizontal milling and turning processing device is provided, comprising the fixture of the horizontal milling and turning processing device mentioned above.

[0013] In a third aspect of the present disclosure, a horizontal milling and turning method for a thin-walled carbon fiber cabin is provided, comprising:

[0014] Get size, get the preset size of the cabin;

[0015] Clamping fixtures, installing the fixtures of the horizontal milling and turning processing device on the machine tool, and setting the multiple support parts to the starting position;

[0016] Clamping the cabin body, clamping the cabin body to the fixture of the horizontal milling and turning processing device, the support part respectively presses against the inner circle of the large end frame of the cabin body, the inner circle of the small end frame and the interior of the cabin body, and fixes it with the axial hole of the small end frame of the cabin body as the positioning reference;

[0017] Turning engineering, using the end face of the small end frame end as the axial machining reference to machine the end face of the cabin body, and machining the wall thickness and height of each end face of the cabin body;

[0018] In the milling process, the end face of the small end frame is used as the axial machining reference for milling various preset characteristic parts of the cabin body.

[0019] In a feasible implementation, it also includes:

[0020] Grinding works include grinding to remove burrs on the edges of the processed parts, cleaning dust and other excess materials on the inner and outer surfaces, and checking the dimensions and geometric tolerances according to the preset dimensions.

[0021] The above description is only an overview of the technical solution provided by the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented according to the contents of the specification. In order to make the above and other features and effects of the present disclosure more obvious and easy to understand, the implementation methods of the present disclosure are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the structure of the workpiece to be processed in the embodiment of the present disclosure;

[0026] Figure 2 It is one of the structural schematic diagrams of the fixture of the horizontal milling and turning processing device disclosed in the present invention;

[0027] Figure 3 The second structural schematic diagram of the fixture of the horizontal milling and turning processing device disclosed in the present invention;

[0028] Figure 4 It is one of the structural schematic diagrams of the horizontal milling and turning processing device disclosed in the present invention;

[0029] Figure 5 This is the second structural schematic diagram of the horizontal milling and turning processing device disclosed in the present invention.

[0030] in, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names is as follows:

[0031] A-cylinder at the large end frame; B-cylinder in the middle; C-cylinder at the small end frame;

[0032] 100-tailstock; 200-large end frame; 300-small end frame;

[0033] 1-core shaft; 2-telescopic support member; 20-positioning portion; 21-first telescopic support member; 22-second telescopic support member; 23-third telescopic support member; 231-telescopic support column. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0036] At present, the carbon fiber cabin has the characteristics of large cabin size, thin skin wall thickness, weak rigidity, large deformation, poor contour; high precision requirements for part shape and position tolerance; poor part contour, difficult to ensure the processing depth of 90° countersunk holes, and large manual repair workload. The existing manual tooling is difficult to clamp and align, with high labor intensity and low efficiency; the cabin is large in size and requires multiple clamping and alignment, and the shape and position tolerance is difficult to ensure, the processing efficiency is low, and the quality and safety risks are large.

[0037] Based on this, the embodiment of the present disclosure provides a fixture for a horizontal milling and turning processing device, including a mandrel and a support portion, wherein the support portion is arranged on the mandrel, and the support portion includes a plurality of telescopic support members, wherein the plurality of support members are arranged at intervals along the extension direction of the mandrel, and at least one of the plurality of telescopic support members is set as an assembly positioning point. By implementing the technical solution of the present disclosure, all feature processing on the shape can be completed in one clamping, greatly improving product quality and production efficiency.

[0038] The fixture of the horizontal milling and turning processing device is described in detail below through a specific embodiment:

[0039] Reference Figures 1 to 5 As shown, in the first aspect of the present disclosure, a fixture for a horizontal milling and turning processing device is provided, including a core shaft 1 and a support portion, the support portion is arranged on the core shaft 1, wherein the support portion includes a plurality of telescopic support members 2, the plurality of support members are arranged at intervals along the extension direction of the core shaft 1, and at least one of the plurality of telescopic support members 2 is set as an assembly positioning point.

[0040] One end of the mandrel 1 disclosed in the present invention is connected to the three-claw automatic chuck of the horizontal milling and turning processing device, and the other end opposite thereto is used to be tightened with the automatic tailstock to serve as the installation support body of the workpiece to be processed and the support part. The support part is arranged on the mandrel 1, and the support part includes a plurality of telescopic support members 2, and the plurality of telescopic support members 2 are arranged at intervals along the extension direction of the mandrel 1, and at least one of the plurality of telescopic support members 2 is set as an assembly positioning point. The assembly positioning point disclosed in the present invention is used to determine the reference position reached by the telescopic support member 2, that is, when the telescopic support member 2 reaches the reference positioning point, itself and the remaining telescopic support members 2 all reach the corresponding position required for support, so that all feature processing on the shape can be completed in one clamping, such as all holes, windows, etc. on the shape, which can greatly improve product quality and production efficiency.

[0041] Specifically, Figure 1As shown, taking the carbon fiber cabin as an example, the number of telescopic support members 2 is set to three, and the three telescopic support members 2 correspond to Figure 1 Among the three cylinder points A, B, and C, the diameter of the cylinder is smaller than the diameter of the end frame, and the connection point between the two is provided with a table surface, that is, a plane along the circumference of the cylinder mouth. Among them, the telescopic support member 2 close to the side with a smaller diameter of the end frame is used as the assembly positioning point. Then, when the telescopic support member 2 is located at the cylinder point C, the other two telescopic support members 2 also correspond to the positions A and B, so as to facilitate the assembly of the workpiece to be processed before support. Furthermore, the telescopic support member 2 can be set as a telescopic plate, a telescopic column or other structures, and the specific location of the workpiece to be processed that needs to be supported is set according to the adaptability of the selected workpiece to be processed. For example, in the embodiment of the carbon fiber cabin body disclosed in the present invention, the support points of the telescopic support member 2 are most preferably all-round in the circumference of the interior of the cabin body. For example, an annular telescopic member is provided, and multiple support points can be provided at different radial directions of the cabin body.

[0042] In some embodiments, the telescopic support member 2 set as an assembly positioning point includes a telescopic member 223, a mounting member 221 and a positioning member 222. The positioning member 222 and the telescopic member 223 are arranged on the mounting member 221. The telescopic member 223 is used to support the inner wall of the workpiece to be processed, and the positioning member 222 is used to locate the axial position of the workpiece to be processed and the core shaft 1.

[0043] In this embodiment, the telescopic support member 2 set as the assembly positioning point includes a telescopic member 223, a mounting member 221 and a positioning member 222. The mounting member 221 is set on the core shaft 1, and the mounting member 221 can be sleeved on the core shaft 1. The positioning member 222 can be set at a point in the circumference of the mounting member 221 or evenly spaced along the circumference of the mounting member 221. The present disclosure specifically sets the number of positioning members 222 to three, which are evenly spaced along the circumference of the mounting member 221 to ensure that the central axis of the extension direction of the workpiece to be processed basically overlaps with the central axis of the core shaft 1, thereby improving the supporting effect of the support part on the interior of the cabin. For example, in the embodiment of the carbon fiber cabin, Figure 2 As shown, the positioning member 222 abuts against the table as described above, and the telescopic member 223 extends into the cylinder for support. It should be noted that, in order to prevent the positioning member 222 from blocking the telescopic member 223, the telescopic path of the telescopic member 223 should give way to the positioning member 222, or the annular telescopic range of the telescopic member 223 is smaller than the surrounding range of the positioning member 222. Since the diameter of the cylinder is smaller than the diameter of the cabin end frame, the support range of the telescopic member 223 is smaller than the surrounding range of the positioning member 22 and does not affect its support for the cylinder. It is understandable that the telescopic member 223 should be able to enter the interior of the cylinder to support the interior, for example, the telescopic member 223 is partially protruded from the positioning member 222 or the telescopic member 223 is set to be movable along the extension direction of the core shaft 1 for position adjustment.

[0044] In some embodiments, the support portion includes a first telescopic support member 21, a second telescopic support member 22 and a third telescopic support member 23, the third telescopic support member 23 is arranged between the first telescopic support member 21 and the second telescopic support member 22, the second telescopic support member 22 is arranged as an assembly positioning point, and the second telescopic support member 22 is arranged on the side of the core shaft 1 close to the tailstock 100 of the horizontal milling and turning processing device.

[0045] In this embodiment, the second telescopic support member 22 is arranged on one side of the core shaft 1 close to the tailstock 100 of the horizontal milling and turning processing device as an assembly positioning point to press against the inner circle of the small end frame of the workpiece cabin to facilitate the axial positioning of the workpiece to be processed and the core shaft.

[0046] In some embodiments, the third telescopic support member 23 has a plurality of telescopic support columns 231 evenly distributed along the circumferential direction.

[0047] In this embodiment, the third telescopic support member 23 is evenly distributed along the circumferential direction with a plurality of telescopic support columns 231. Specifically, the third telescopic support member 23 is set as a polygonal structure sleeved on the core shaft 1, and a telescopic support column 231 is set on each surface to facilitate multi-directional support of the middle part of the workpiece to be processed, thereby improving the support effect.

[0048] In some embodiments, a plurality of telescopic supports 2 are slidably connected to the core shaft 1 to facilitate adjustment of the supporting position of the telescopic supports 2 .

[0049] In some embodiments, the telescopic support 2 is configured as a synchronous self-centering motion structure. The working principle of the synchronous self-centering motion structure is to utilize the equidistant movement or uniform elastic deformation of the positioning element and the clamping element to eliminate the influence of the inaccuracy of the positioning element and the positioning reference surface of the workpiece and the positioning dimension deviation, that is, the telescopic support 2 can be configured so that the three support members are telescoped outward from the same center point, and the angles of the three support members are equidistant, and the telescopic length and telescopic speed are the same, for example, the support surfaces of the three support members form a perfect circle in the initial state. Furthermore, the driving mode of the telescopic support 2 is configured as pneumatic drive and / or hydraulic drive.

[0050] In a second aspect of the present disclosure, a horizontal milling and turning processing device is provided, comprising the fixture of the horizontal milling and turning processing device mentioned above.

[0051] In a third aspect of the present disclosure, a horizontal milling and turning method for a thin-walled carbon fiber cabin is provided, comprising:

[0052] Get size, get the preset size of the cabin;

[0053] Clamping fixtures, installing the fixtures of the horizontal milling and turning processing device on the machine tool, and setting the multiple support parts to the starting position;

[0054] Clamp the cabin body to the fixture of the horizontal milling and turning processing device, and the support part presses against the inner circle of the large end frame 200 of the cabin body, the inner circle of the small end frame 300 and the interior of the cabin body respectively, and fixes it with the axial hole of the small end frame of the cabin body as the positioning reference;

[0055] Turning engineering, using the end face of the small end frame as the axial machining reference to machine the cabin end face, and machining the wall thickness and height of each end face of the cabin;

[0056] In the milling process, the end face of the small end frame is used as the axial machining reference for milling various preset feature parts of the cabin.

[0057] Specifically, take the carbon fiber cabin as an example, obtain the dimensions, and detect the conventional dimensions of the cabin blank. Detect the front frame wall thickness, rear frame wall thickness, and total height dimensions to determine the allowance distribution. The theoretical axial allowance of the front and rear faces is 1mm, and the theoretical axial allowance of the total height is 2mm;

[0058] Clamping fixture: hoist the fixture of the horizontal milling and turning device onto the machine tool; one end of the mandrel 1 is automatically clamped with a three-claw self-centering clamp, and the other end is automatically tightened; due to the large size and weight of the fixture, the mandrel 1 can prevent the fixture from sagging after the tailstock is moved and the ejector pin is released during the turning process. Move the tailstock to reserve clamping space for the product; reset the tightening blocks of multiple telescopic supports 2 to avoid interference during subsequent product hoisting; in this embodiment, multiple telescopic supports 2 are set to pneumatic and hydraulic drive, and the telescopic supports 2 corresponding to the large end frame 200 and the small end frame 300 of the cabin body, namely the first telescopic support 21 and the second telescopic support 22, are set to pneumatic drive, and the quick-plug air source interfaces of the first telescopic support 21 and the second telescopic support 22 are connected to the air pipe of the air compressor. Furthermore, the first telescopic support 21 and the second telescopic support 22 are both independently controlled pneumatic structures. The first telescopic support 21 and the second telescopic support 22 each have three tightening blocks, and the three tightening blocks of the first telescopic support 21 and the second telescopic support 22 are all synchronous self-centering motion structures with a telescopic distance of 5 mm. The third telescopic support 23 between the first telescopic support 21 and the second telescopic support 22 is a 6-cylindrical support mechanism with synchronous self-centering motion.

[0059] Use a special lifting device to lift the workpiece to be processed, and put the workpiece on the fixture of the horizontal milling and turning processing device. Use the first telescopic part 21 as the assembly positioning point, and the large end face of the workpiece to be processed corresponds to the positioning point of the first telescopic part 21. During this period, the lifting device is not allowed to contact the cabin to avoid damaging the product. Connect the air source, turn on the switch, the tightening block of the first telescopic part 21 extends, presses against the inner circle of the large end frame 200 of the cabin, turn off the switch, maintain pressure, and remove the air compressor air pipe joint; connect the air source, turn on the switch, the tightening block of the second telescopic part 21 extends, presses against the inner circle of the small end frame 300 of the cabin, turn off the switch, maintain pressure, and remove the air compressor air pipe joint; use the axial hole of the small end frame 300 of the cabin as the positioning reference, and install the positioning pin. Because the small end face 300 has a 1mm processing allowance in the axial direction, the positioning pin needs to be recessed into the small end face 300 with a depth greater than 2mm. The processing device tooling is fixedly connected to the cabin body in the circumferential direction to prevent the tooling from circumferentially moving after the cabin body is subjected to force.

[0060] Turning engineering, the processing content is to turn the cabin end face. Specifically, determine the processing datum, take the small end face 300 as the axial processing datum; turn the front and rear faces of the cabin, leaving a 0.3mm polishing allowance.

[0061] Grinding engineering, polish the end face, determine the processing benchmark, take the small end face as the axial processing benchmark, grind the front and rear faces of the cabin, and coordinate the front and rear frame wall thickness and total height of the cabin;

[0062] Milling engineering: The processing content is milling the cabin body's external holes, windows and other features. Specifically, determine the processing datum, take the small end face as the axial processing datum, and take quadrant line I as the circumferential processing datum; mill the window on the outer circle; mill the waist-shaped notch on the outer circle; drill the through hole on the outer circle and its 90° countersunk hole; drill the hole on the front end face; drill the hole on the rear end face.

[0063] After completing the above steps, remove the product from the tooling, fix the position of the mandrel 1 with the mandrel support mechanism, move the tailstock to reserve space for removing the product; make sure that the tightening blocks of each telescopic support are out of contact with the product, and hoist the product with a hoist; remove the small-end circumferential positioning pin, hoist the product from the tooling fixture, and place it on the cabin body turnover bracket.

[0064] In some embodiments, it also includes grinding to remove burrs on the edges of the processed parts, clean up dust and other waste materials on the inner and outer surfaces, and check the size and shape tolerances according to the preset size. Specifically, the fitter grinds to remove burrs on the edges of the processed surfaces, holes, and windows, and uses a vacuum cleaner to clean up dust and other waste materials on the inner and outer surfaces. According to the design status, the size and shape tolerances are fully checked.

[0065] In the present disclosure, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0066] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present disclosure.

[0067] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0068] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A fixture for a horizontal milling and turning device, characterized in that: It comprises a core shaft and a support portion, wherein the support portion is arranged on the core shaft, wherein: The support portion includes a plurality of telescopic support members, the plurality of telescopic support members are arranged at intervals along the extension direction of the core shaft, and at least one of the plurality of telescopic support members is arranged as an assembly positioning point.

2. The fixture of the horizontal milling and turning device according to claim 1 is characterized in that: The telescopic support member set as the assembly positioning point includes a telescopic member, a mounting member and a positioning member. The positioning member and the telescopic member are arranged on the mounting member. The telescopic member is used to support the inner wall of the workpiece to be processed, and the positioning part is used to locate the axial position of the workpiece to be processed and the core shaft.

3. The fixture of the horizontal milling and turning device according to claim 1 is characterized in that: The support portion includes a first telescopic support member, a second telescopic support member and a third telescopic support member, the third telescopic support member is arranged between the first telescopic support member and the second telescopic support member, the second telescopic support member is arranged as the assembly positioning point, and the second telescopic support member is arranged on the side of the core shaft close to the tailstock of the horizontal milling and turning processing device.

4. The fixture of the horizontal milling and turning device according to claim 3 is characterized in that: The third telescopic support member has a plurality of telescopic support columns uniformly distributed along the circumferential direction.

5. The fixture of the horizontal milling and turning device according to claim 1, characterized in that: A plurality of the telescopic supports are slidably connected to the core shaft.

6. The fixture of the horizontal milling and turning device according to claim 1, characterized in that: The telescopic support is arranged as a synchronous self-centering motion structure.

7. The fixture of the horizontal milling and turning device according to claim 1, characterized in that: The telescopic support is driven by pneumatic drive and / or hydraulic drive.

8. A horizontal milling and turning device, characterized in that: A fixture for a horizontal milling and turning processing device comprising any one of claims 1 to 7.

9. A horizontal milling and turning method for a thin-walled carbon fiber cabin, applied to the horizontal milling and turning device described in claim 8, characterized in that: include: Get size, get the preset size of the cabin; Clamping fixtures, installing the fixtures of the horizontal milling and turning processing device on the machine tool, and setting the multiple support parts to the starting position; Clamping the cabin body, clamping the cabin body to the fixture of the horizontal milling and turning processing device, the support part respectively presses against the inner circle of the large end frame of the cabin body, the inner circle of the small end frame and the interior of the cabin body, and fixes it with the axial hole of the small end frame of the cabin body as the positioning reference; Turning engineering, using the end face of the small end frame end as the axial machining reference to machine the end face of the cabin body, and machining the wall thickness and height of each end face of the cabin body; In the milling process, the end face of the small end frame is used as the axial machining reference for milling various preset characteristic parts of the cabin body.

10. The horizontal milling and turning method for thin-walled carbon fiber cabin according to claim 9, characterized in that: Also includes: Grinding works include grinding to remove burrs on the edges of the processed parts, cleaning dust and other excess materials on the inner and outer surfaces, and checking the dimensions and geometric tolerances according to the preset dimensions.

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