Rotary clamp for milling end socket

Abstract

The utility model belongs to the technical field of end socket milling clamps, and particularly relates to an end socket milling rotary clamp which comprises a horizontally arranged bottom plate and a side plate which is vertically fixed on the bottom plate and forms an included angle of 40 degrees, a panel is fixed at the upper end of the included angle of the side plate, a disc for installing a workpiece is rotatably arranged on the panel, and when the workpiece is arranged on the disc, the workpiece is fixed on the side plate. The axis of the flange base to be machined is in a vertical state, a mandrel is arranged in the center of the panel and the center of the disc, and one end of the mandrel is connected with a cover plate through a bolt. The positioning device is used in cooperation with a three-axis gantry machining center, compared with a five-axis gantry machining center, the cost is lower, rotary machining of a plurality of flanges on an end socket can be facilitated, according to the shape characteristics of the end socket, inner and outer clamping is arranged in the middle, pressing is arranged on the outer side, stable positioning can be achieved under the condition that the end socket is prevented from being damaged, jumping of the end socket in the machining process is avoided, and machining efficiency is improved. And due to the arranged pressurizing component, the multiple flanges can be switched more easily during machining.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of head milling fixture, specifically relates to a head milling processing rotary fixture. BACKGROUND

[0002] With the development of China's aerospace technology, commercial aerospace becomes a new highland of great power competition, domestic policy continues to vigorously promote, China's commercial aerospace field continues to make breakthroughs, enters the expressway of industrial development, insiders predict that the market size will reach 1.1 trillion US dollars by 2030. Rocket manufacturing and launching enterprises mainly include aerospace technology, star river power, space science and technology, blue arrow aerospace, star glory, zero space, east space technology, east space, etc., the gas storage tank is an important part of the rocket, and the front and rear heads are components of the gas storage tank;

[0003] The part is a thin-walled special-shaped part, the main difficulty is that the clamping and positioning are difficult, the pressing part conflicts with the machining part, the workpiece is easy to deform, if five-axis machining is selected, it is relatively easy to realize, but the workpiece is large, and the machining range of the machine tool is required to be not less than 1.2 meters, so the cost is high, therefore, a special rotary fixture is arranged on the three-axis gantry machining center to complete the machining of the workpiece, so that the cost is reduced.

[0004] The part structure is an inner and outer shape surface ellipse ball, the wall thickness is 4.15, the tolerance is 0.15, 4 flange seats are uniformly distributed on the shape surface, and the bottom plane forms a 40° angle, this part needs to be milled to be completed, the upper and lower surfaces of the connection need to be turned to be completed, it is difficult to keep consistent by using two methods to machine the same contour surface, and the clamp positioning of the milling machine must be accurate;

[0005] To solve the above problems, a head milling processing rotary fixture is provided in the application. UTILITY MODEL CONTENTS

[0006] To solve the above problems in the prior art, the utility model provides a head milling processing rotary fixture, which has the characteristics of controlling cost, improving processing reliability and convenience.

[0007] To achieve the above object, the utility model provides the following technical scheme: a rotary clamp for head milling processing, including the bottom plate of horizontal arrangement and the side plate of vertical fixed on the bottom plate and the shaping has 40 DEG angle, the side plate angle upper end is fixed with the panel, the panel is equipped with the disc of installing work piece rotation, work piece is on the disc, and the flange seat axis to be processed is in the vertical state, the panel, disc center is equipped with the mandrel, one end of mandrel is connected with the apron through bolt, the disc upper end circle center is equipped with the positioning part of the inside and outside support of work piece center, the disc outer ring is equipped with the outer pressure part of the work piece outside pressure, and the opposite end of outer pressure part is equipped with the positioning pin of the positioning of panel and disc, the panel and disc still are equipped with the pressurizing part of the auxiliary disc and work piece rotation, the panel and disc still are equipped with the 4 locking screws of circumferential distribution, and locking screw and pressurizing part cooperation drive the 4 flanges on work piece switch to vertical processing position.

[0008] As a preferred technical scheme of the utility model, the positioning part includes a plurality of struts circumferentially distributed along the disc upper end axis, a connecting plate fixed on the struts and parallel to the disc, and a pressure plate coaxial and parallel to the connecting plate.

[0009] As a preferred technical scheme of the utility model, the struts and the connecting plate are fixed by bolts, and the bolts form an inner support point of the workpiece.

[0010] As a preferred technical scheme of the utility model, four positioning holes are circumferentially distributed on the disc, and the positioning holes are opposite to the outer pressure part.

[0011] As a preferred technical scheme of the utility model, the outer pressure part includes a support rod vertically fixed on the disc and a pressure plate slidingly fitted on the outside of the support rod, and a second pressing bolt penetrating the pressure plate and screwing with the disc.

[0012] As a preferred technical scheme of the utility model, the second pressing bolt drives the pressure plate and presses the aluminum pad and the workpiece on the disc after screwing.

[0013] As a preferred technical scheme of the utility model, the pressurizing part includes a support block vertically arranged on the panel and fixed by bolts, and a force rod hinged on the support block, the front end of the force rod is located on the rotation path of the locking screw along the panel, and the rear end is a hand-held part.

[0014] As a preferred technical scheme of the utility model, the reinforcing ribs are arranged between the bottom plate and the side plate for supporting, the disc and the panel contact surface are provided with the sink, and the panel and the disc are provided with a plurality of oil injection nozzles near the sink position.

[0015] Compared with the prior art, the utility model has the beneficial effects that: the utility model is used in cooperation with a three-axis gantry machining center, firstly, the cost is lower than that of a five-axis machine, and the rotary machining of multiple flanges on the head can be facilitated, secondly, according to the shape characteristics of the head, inner and outer clamping are arranged in the middle, and pressing is arranged on the outer side, so that the head can be stably positioned without being damaged, thereby avoiding the jumping of the head during machining, and the arranged pressing component can make the switching of multiple flange machining more relaxed. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used together with embodiments of the utility model to explain the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0017] Figure 1 It is a structure schematic view when the utility model is viewed from the side and the workpiece is positioned;

[0018] Figure 2 It is a structure schematic view when the utility model is viewed from the back;

[0019] Figure 3 It is a structure schematic view of the panel in the utility model;

[0020] Figure 4 It is a structure schematic view of the panel, the disc and the pressing component in the utility model;

[0021] Figure 5 It is a structure schematic view of the pressing plate in the utility model, viewed from the front and the top;

[0022] In the drawings: 1, bottom plate; 2, side plate; 3, panel; 4, reinforcing rib; 5, disc; 6, mandrel; 7, cover plate; 8, support column; 9, connecting plate; 10, pressing disc; 11, first pressing bolt; 12, supporting rod; 13, pressing plate; 14, second pressing bolt; 15, aluminum pad; 16, positioning hole; 17, positioning pin; 18, oil injection nozzle; 19, supporting block; 20, force rod; 21, locking screw. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0024] Embodiment

[0025] Please refer to Figures 1-5 The utility model provides the following technical scheme: a rotary clamp for head milling processing, which comprises a horizontal bottom plate 1 and a vertical side plate 2 fixed on the bottom plate 1 and shaped with a 40-degree angle, a face plate 3 is fixed on the upper end of the side plate 2, a disc 5 for mounting a workpiece is rotatably arranged on the face plate 3, when the workpiece is on the disc 5, the shaft center of the flange seat to be processed is in a vertical state, a mandrel 6 is arranged at the center of the disc 5 and the face plate 3, one end of the mandrel 6 is connected with a cover plate 7 through bolts, a positioning component for supporting the workpiece inside and outside the center is arranged at the center of the upper end of the disc 5, an outer pressing component for pressing the workpiece outside is arranged on the outer ring of the disc 5, opposite ends of the outer pressing component relative to the workpiece are further provided with positioning pins 17 for positioning the face plate 3 and the disc 5, a pressing component for assisting the rotation of the disc 5 and the workpiece is further arranged between the face plate 3 and the disc 5, four locking screws 21 are further arranged between the face plate 3 and the disc 5 in a circumferential distribution, and the locking screws 21 are matched with the pressing component to drive four flanges on the workpiece to switch to a vertical machining position.

[0026] Specifically, the positioning component comprises a plurality of support columns 8 distributed in a circumferential direction along the shaft center of the upper end of the disc 5, a connecting plate 9 fixed on the support columns 8 and parallel to the disc 5, and a pressing disc 10 coaxial with and parallel to the connecting plate 9, the support columns 8 and the connecting plate 9 are fixed through bolts, and the bolts are formed with an inner support point of the workpiece, the pressing disc 10 is pressed outside the center of the workpiece, a first pressing bolt 11 is penetrated through the pressing disc 10 and is screw-connected with the connecting plate 9 to press the workpiece tightly, and in the embodiment, the number of the support columns 8 is at least two, the connecting bolt between the support column 8 and the connecting plate 9 can be padded with something to avoid indentation, and the diameter of the pressing disc 10 is greater than the diameter of the center hole of the workpiece. Figure 1

[0027] Specifically, four positioning holes 16 are arranged on the disc 5 in a circumferential direction, the positioning holes 16 on the disc 5 are opposite to the outer pressing component, the positioning pins 17 are penetrated through the disc 5 and are inserted into one of the positioning holes 16 to lock the disc 5, and in the embodiment, the cooperation of the positioning holes 16 and the positioning pins 17 can quickly position the workpiece and the disc 5 after rotation, and also facilitates the locking of the locking screws 21.

[0028] ​Specifically, the external pressure component includes a support rod 12 vertically fixed on the disc 5 and a pressure plate 13 that is fitted and slidable on the outside of the support rod 12, and a second clamping bolt 14 that passes through the pressure plate 13 and is spirally connected to the disc 5. It also includes an aluminum pad 15 that matches the arc groove on the outside of the workpiece. After the second clamping bolt 14 is screwed, it drives the pressure plate 13 and presses the aluminum pad 15 and the workpiece onto the disc 5. In this embodiment, Figure 1 As shown, since the workpiece is relatively thin and has a special structure, and only a portion of the periphery is in direct contact with the disc 5, the external pressure component can apply a vertical force to the disc 5 from this portion, thereby improving the stability of the workpiece on the disc 5 and avoiding the workpiece from jumping during processing.

[0029] Specifically, the pressure component includes a support block 19 vertically arranged on the panel 3 and fixed by bolts, and a force rod 20 hinged on the support block 19. The front end of the force rod 20 is located on the rotation path of the locking screw 21 along the panel 3, and the rear end is a handheld part. In this embodiment, Figure 4 In the state shown, when the right side of the force rod 20 is rotated downward along the support block 19, the front end of the force rod 20 will push the aluminum pad 15 to rotate upward and prompt the disc 5 to rotate on the panel 3, thereby facilitating the rotation of the workpiece and the disc 5. The four locking screws 21 also cooperate with the four positioning holes 16 on the panel 3.

[0030] Specifically, supporting reinforcing ribs 4 are provided between the bottom plate 1 and the side plate 2, and a recessed groove is provided on the contact surface between the disc 5 and the panel 3, and a plurality of oiling nozzles 18 are provided near the recessed groove on the panel 3 and the disc 5. In this embodiment, the reinforcing ribs 4 are connected to the bottom plate 1 and the side plate 2 respectively by bolts to enhance the connection stability. The recessed groove on the disc 5 is used to reduce the contact area with the panel 3, and the oiling nozzle 18 is provided to add lubricating oil to the contact position between the two, thereby making the disc 5 rotate more flexibly and easily.

[0031] The working principle and use process of this utility model:

[0032] Install the fixture on the machine tool and pre-position it, align the reference surface and level it, align the center hole, make sure the runout is less than 0.01, determine the workpiece coordinate system, and fix the fixture with bolts;

[0033] The positioning pin 17 is inserted into the positioning hole 16 in the disc 5 and is inserted into the positioning hole 16 in the panel 3, then the panel 3 and the disc 5 are locked by the locking screw 21, the disc 5 is stabilized on the panel 3, the surface of the disc 5 is cleaned, the positioning surface of the workpiece in contact with the disc 5 is cleaned, and the workpiece is placed on the disc 5, the inner center of the workpiece is supported on the connecting bolt of the support column 8 and the connecting plate 9, at this time, in order to avoid that the bolt causes the workpiece to be pressed, the workpiece can be protected by a pad, then the pressing plate 10 is covered outside the center hole of the workpiece, the first pressing bolt 11 is inserted into the connecting plate 9 from the front end of the pressing plate 10, the workpiece is positioned in the center, the flange seat of the workpiece is aligned, the aluminum pad 15 is placed in the arc-shaped groove outside the workpiece, the second pressing bolt 14 is screwed and drives the pressing plate 13 and the aluminum pad 15 to fix the workpiece;

[0034] The machining program is compiled by using a computer, the inner hole and the connected oval surface of the flange seat are machined by using a 3D machining method, and the finishing allowance is 0.5;

[0035] The locking screw 21 is separated from the panel 3, the positioning pin 17 is pulled out of the positioning hole 16, the outer side of the force applying rod 20 is held and is rotated along the support block 19, the aluminum pad 15 at the corresponding position is pushed by the front end of the force applying rod 20, then the disc 5 drives the workpiece to rotate on the panel 3 along the mandrel 6, the positioning pin 17 is inserted into the positioning hole 16 at the corresponding position after the workpiece is rotated by 90°, then the disc 5 and the panel 3 are locked by the aluminum pad 15, and the second flange seat is machined. The above process is repeated until four flange seats are machined.

[0036] The finishing machining of the flange seat is the same as the rough machining, only the cutting tool is different, and the workpiece is removed after four cycles of machining.

[0037] Finally, it should be noted that the above only describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A head milling machining rotary clamp, characterized by: The utility model provides a flange centering device, including horizontal arrangement bottom plate (1) and vertical fixed in bottom plate (1) and be shaped with 40 ° angle of side plate (2), the side plate (2) angle upper end is fixed with panel (3), the panel (3) is provided with the disc (5) of installing work piece rotation, work piece is on the disc (5), and the flange seat axis to be processed is in vertical state, the panel (3), disc (5) center is equipped with the mandrel (6), one end of mandrel (6) is connected with the cover plate (7) through bolt, disc (5) upper end circle center is equipped with the positioning component of work piece center inside and outside support, disc (5) outer ring is equipped with the outer pressure component of work piece outside pressure, and the opposite end of outer pressure component relative work piece is equipped with the positioning pin (17) of positioning panel (3) and disc (5), panel (3) and disc (5) between still be equipped with the pressurizing component of auxiliary disc (5) and work piece rotation, panel (3) and disc (5) between still be equipped with the circumferential distribution of 4 locking screw (21), and locking screw (21) and pressurizing component cooperation drive 4 flanges on work piece switch to vertical processing position.

2. The head milling rotary fixture according to claim 1, wherein: The positioning component includes a plurality of support columns (8) circumferentially distributed along the upper end axis of the disc (5), a connecting plate (9) fixed to the support columns (8) and parallel to the disc (5), and a pressure plate (10) coaxial and parallel to the connecting plate (9).

3. The head milling machining rotary clamp according to claim 2, characterized in that: The support columns (8) and the connecting plate (9) are fixed by bolts, and the bolts form an inner support point of the workpiece.

4. The head milling rotary fixture of claim 1, wherein: The pressure plate (10) is pressed outside the center of the workpiece, and the first pressing bolt (11) penetrates the pressure plate (10) and is screw-connected with the connecting plate (9) to press the workpiece tightly.

5. The head milling rotary fixture of claim 1, wherein: The disc (5) is provided with four circumferentially distributed positioning holes (16), and the disc (5) is provided with a positioning hole (16) opposite to the outer pressure component.

6. A head-milling machining rotary clamp according to claim 5, characterized in that: The positioning pin (17) penetrates the disc (5) and is inserted into one of the positioning holes (16) to lock the disc (5).

7. The head milling machining rotary clamp according to claim 1, characterized in that: The outer pressure component includes a support rod (12) vertically fixed to the disc (5) and a pressing plate (13) sleeved and sliding on the outside of the support rod (12), a second pressing bolt (14) penetrating the pressing plate (13) and screw-connected with the disc (5), and an aluminum pad (15) matching the arc-shaped groove on the outside of the workpiece.

8. The head milling machining rotary clamp according to claim 1, characterized in that: The second pressing bolt (14) is screw-connected to drive the pressing plate (13) and press the aluminum pad (15) and the workpiece tightly on the disc (5). The pressurizing component includes a support block (19) vertically arranged on the panel (3) and fixed by bolts, and a force applying rod (20) hinged to the support block (19), wherein the front end of the force applying rod (20) is located on the rotation path of the locking screw (21) along the panel (3), and the rear end is a hand-held portion. The bottom plate (1) and the side plate (2) are further provided with a reinforcing rib (4) for supporting. The disc (5) and the panel (3) are provided with a sink at the contact surface, and the panel (3) and the disc (5) are provided with a plurality of oil injection nozzles (18) near the sink.

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