Encircling type four-axis tool based on box part inner cavity multi-direction inclined hole machining

Abstract

The utility model relates to a surrounding type four-axis tool based on multi-direction inclined hole machining of inner cavities of box parts, which is based on a four-axis machining center, inclined plunger holes in four different directions of the inner cavities at two ends of the box parts and a platform surface of an external reverse hole opening mounting nut, and comprises a four-axis index plate connecting plate, the four-axis index plate connecting plate is connected with an inclined plane positioning supporting seat through a thread pair; two groups of rectangular positioning pins and a plurality of equal-height supporting blocks are arranged on the inclined plane positioning supporting seat; one reference positioning plane of the box part is attached to the bearing face at one end of the equal-height bearing block, and meanwhile after the two sets of rectangular positioning pins and the positioning face of the box part are positioned through the two rectangular holes formed in the positioning face of the box part, the assembling requirement of clearance fit is met, and the freedom degree of the box is limited. The tool is simple in structure, low in design and manufacturing cost, convenient and fast to operate and stable and reliable in positioning and clamping, and hole and surface machining in multiple directions can be completed on a four-axis machining center through one-time clamping.

Description

Technical Field

[0001] The utility model relates to the technical field of machining tooling, in particular to an embracing type four-axis tooling for machining multi-direction inclined holes in the inner cavity of a box part. Background Art

[0002] In current production, considering that the axial directions of the four inclined holes are all different, if processed in separate processes, the number of toolings is large, resulting in an increase in the direct investment in tooling costs; the process route is too long, the auxiliary working hours such as clamping and transfer in the production process are relatively long, the development cycle is extended, and the time cost increases; at the same time, multiple clamps will also lead to an increase in the risk coefficient of scrapping as the cumulative error increases. Content of the Utility Model

[0003] To solve the above technical problems, the utility model provides an embracing type four-axis tooling for machining multi-direction inclined holes in the inner cavity of a box part. The embracing type four-axis tooling is based on a four-axis machining center, and through one-time clamping, it can complete the machining of four inclined plug holes in different directions at both ends of the inner cavity of the box part and the platform surface for installing nuts at the external counterbore opening. It includes a four-axis indexing plate connecting plate, on which a bevel positioning support seat is connected through a thread pair. Two groups of rectangular positioning pins and several equal-height support blocks are arranged on the bevel positioning support seat. At the same time, the rectangular positioning pins and the equal-height support blocks are both fixedly connected to the bevel positioning support seat through screws; a reference positioning plane of the box part is attached to one end support surface of the equal-height support block. At the same time, after the two groups of rectangular positioning pins are positioned with two rectangular holes provided on the positioning surface of the box part and meet the requirements of clearance fit, the degrees of freedom of the box are restricted.

[0004] In an embodiment of the utility model, a large U-shaped groove is opened on one side edge at the upper end of the bevel positioning support seat to reduce the weight of the part. Positioning grooves are opened in the middle of the edges at both ends of the U-shaped groove, and hinge holes are arranged along the edge line direction.

[0005] In an embodiment of the utility model, two rotary connection support plates are arranged on the end face of the bevel positioning support seat, and an H-shaped pressing plate is arranged between the rotary connection support plates. One end of the rotary connection support plate is a ball head feature body, and the other end is provided with a small cylindrical platform feature body. After the two sides of the ball head feature body are milled flat, hinge holes are opened on the normal axis of the milled flat plane of the ball head. After the ball head feature body is assembled with the positioning groove, a clearance fit is formed; the hinge holes on the bevel positioning support seat and the hinge holes on the rotary connection support plate are coaxially assembled and hinged through headless screws;

[0006] A threaded hole is provided at the top of the cylindrical feature body, and an axial hole is formed between the cylindrical surface part of the cylindrical feature body and the countersunk hole on the V-shaped forked structure at one end of the H-shaped pressure plate, and the H-shaped pressure plate is connected to the rotating connection support plate through a threaded pair. After assembly, the plane where the H-shaped pressure plate is located and the plane where the rotating connection support plate is located are perpendicular to each other.

[0007] In one embodiment of the utility model, a V-shaped groove is provided on the outer side surface of the two forked heads at the other end of the H-shaped pressure plate for the front end catch portion of the locking buckle plate to be embedded.

[0008] In one embodiment of the utility model, an adjustable supporting pin is provided on the rotating link supporting plate.

[0009] In one embodiment of the utility model, two sets of hinge supports are fixedly connected on the four-axis dividing plate connecting plate through a threaded pair, wherein a hinge hole provided at one end of the locking buckle plate is coaxially connected with a hinge hole provided at the top end of the hinge support through a pin shaft to form a hinge structure, wherein shaft retaining rings are also provided at both ends of the pin shaft.

[0010] Compared with the prior art, the above technical solution of the utility model has the following advantages: the structure of the enveloping four-axis tooling described in the utility model is relatively simple, the design and production cost is not high, the operation is convenient, the positioning and clamping are stable and reliable, and the four-axis machining center can be clamped once, and the rotation angle of the indexing plate can be accurately controlled by the CNC system to complete all the processing content in one process. The development cycle of the box parts is shortened, the processing accuracy is improved, and the scrap rate and processing cost are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0012] Figure 1 It is a structural schematic diagram of the enveloping four-axis tooling for machining multi-directional oblique holes in the inner cavity of a box part according to the utility model;

[0013] Figure 2 This is the AA cross-sectional view of the enveloping four-axis tooling after assembly of the utility model;

[0014] Figure 3 It is a side view of the enveloping four-axis tooling of the utility model;

[0015] Figure 4 It is a structural schematic diagram of the rotary link support plate of the utility model.

[0016] As shown in the figure: 1. Four-axis indexing plate connecting plate; 2. Inclined positioning support seat; 3. Rectangular positioning pin; 3-1. Equal height support block; 4. Rotating connection support plate; 4-1. Adjustable support pin; 5. H-shaped pressure plate; 6. Locking buckle plate; 6-1. Hinge support. DETAILED DESCRIPTION

[0017] like Figure 1 and Figure 2 As shown, the present embodiment provides an embracing four-axis tooling for processing multi-directional inclined holes in the inner cavity of a box part, the embracing four-axis tooling is based on a four-axis machining center, and completes the processing of four inclined plunger holes in different directions of the inner cavity at both ends of the box part and a platform surface for mounting nuts on the external reverse hole opening through one clamping, and is characterized in that it includes a four-axis dividing plate connecting plate, and the four-axis dividing plate connecting plate is provided with an inclined surface positioning support seat through a threaded pair, and the inclined surface positioning support seat is provided with two groups of rectangular positioning pins and a plurality of equal-height support blocks, and the rectangular positioning pins and the equal-height support blocks are fixedly connected to the inclined surface positioning support seat by screws; a reference positioning plane of the box part is in contact with one end support surface of the equal-height support block, and at the same time, after the two groups of rectangular positioning pins and the two rectangular holes provided on the positioning surface of the box part are positioned, they are assembled to meet the clearance fit requirements and limit the freedom of the box.

[0018] It is further explained that although over-positioning exists in the tooling of the utility model when using square pins for positioning, since the positioning reference surface and the positioning rectangular holes have been finely processed and considering that the volume and weight of the box parts are relatively large, the over-positioning not only does not affect the size and shape of the processed parts of the box parts, but also increases the rigidity of the positioning structure, thereby improving the reliability and stability of the positioning.

[0019] In order to describe it more clearly, the normal direction of the four-axis indexing connecting plate is stipulated to be upward, and a large U-shaped groove is opened on the edge of one side of the upper end of the inclined positioning support seat to reduce the weight of the part, and positioning grooves are opened in the middle of the edges on both sides of the U-shaped groove, and hinge holes are arranged along the edge direction. One end of the two rotating connecting support plates is in the form of a ball head, and hinge holes are opened on the axis in the normal direction of the milled flats on both sides of the ball head. The milling and positioning grooves are precisely matched in clearance, and the hinge hole at the upper end of the inclined positioning support seat is coaxial with the hinge hole of the rotating connecting support plate, and the two are hinged by headless screws.

[0020] In order to improve the overall rigidity of the tooling, there is an adjustable support pin on each of the two rotating link support plates for auxiliary support. Since the box parts are positioned on the side in the tooling, when clamping, the box parts need to be positioned and clamped in the tooling, and then the height of the two adjustable support pins needs to be adjusted so that their top ends are in contact with the box parts. The adjustable support pins do not play a positioning role and only bear cutting force.

[0021] Combination Figure 3 ,Figure 4 As shown, a small cylindrical platform is provided at the other end of the rotating connection support plate, and a threaded hole is opened at the top. The cylindrical surface of the cylindrical platform is precisely matched with the countersunk hole opened on the V-shaped fork side of the H-type pressure plate. The H-type pressure plate is at a right angle to the rotating connection support plate through a threaded pair and is fixedly connected to the top of the rotating connection support plate.

[0022] On the outer side of the two forked heads at the other end of the H-type pressure plate, a V-shaped groove is provided for the front end of the locking buckle plate to be embedded. A saddle-shaped bending pad is fixedly connected to the inner side of the middle part of the H-type pressure plate by countersunk screws, and two M16 bolts pass through the threaded holes in the middle of the H-type pressure plate, with the front end against the flat part of the wingspan at both ends of the bending pad.

[0023] The two hinge supports are fixedly connected to the four-axis dividing plate connecting plate through a threaded pair. The hinge hole at one end of the locking buckle plate is coaxial with the hinge hole at the top of the hinge support. The pin is hinged to the hinge support through precise clearance fit. Shaft retaining rings are installed at both ends of the pin to prevent the pin from moving. The locking buckle plate can rotate around the pin.

[0024] In this embodiment, after the box parts are positioned in the four-axis tooling, the locking buckle plate is rotated so that the grabbing part at its front end is embedded in the V-groove on the outside of the H-shaped pressure plate, the M16 screw is rotated to press the bending pad to press the box parts, and at the same time, the H-shaped pressure plate is pushed in reverse to fasten it with the locking buckle plate, thereby completing the locking operation of the box parts in the tooling.

[0025] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. An embracing four-axis tooling for processing multi-directional oblique holes in the inner cavity of a box part, the embracing four-axis tooling is based on a four-axis machining center, and completes the processing of four oblique plunger holes in different directions of the inner cavity at both ends of the box part and the platform surface of the external reverse surface hole for mounting nuts through one clamping, characterized in that: It includes a four-axis indexing plate connecting plate (1). A bevel positioning support seat (2) is connected to the four-axis indexing plate connecting plate (1) through a thread pair. Two groups of rectangular positioning pins (3) and several equal-height support blocks (3-1) are provided on the bevel positioning support seat (2). At the same time, the rectangular positioning pins (3) and the equal-height support blocks (3-1) are fixedly connected to the bevel positioning support seat (2) by screws. One reference positioning plane of the box part is attached to the support surface at one end of the equal-height support block (3-1). At the same time, after the two groups of rectangular positioning pins (3) are positioned with two rectangular holes provided on the positioning surface of the box part and meet the requirements of clearance fit for assembly, the degrees of freedom of the box are restricted.

2. The enveloping four-axis tooling according to claim 1 is characterized in that: A U-shaped groove is opened on one side edge at the upper end of the bevel positioning support seat (2). Positioning grooves are opened in the middle of the edge lines at both ends of the U-shaped groove. At the same time, hinge holes are provided along the edge line direction.

3. The four-axis embracing tooling according to claim 2 is characterized in that: Two rotating connection support plates (4) are provided on the edge of the bevel top of the bevel positioning support seat (2). An H-shaped pressing plate (5) is provided between the rotating connection support plates (4). One end of the rotating connection support plate (4) is a ball head feature body, and the other end is provided with a cylindrical platform feature body. After the two sides of the ball head feature body are milled flat, hinge holes are opened on the normal axis of the milled flat plane of the ball head. After the ball head feature body is assembled with the positioning groove, a clearance fit is formed. The hinge holes on the bevel positioning support seat (2) and the hinge holes on the rotating connection support plate (4) are coaxially assembled and hinged by headless screws. A threaded hole is opened at the top of the cylindrical platform feature body. An axial hole fit is formed between the cylindrical surface part of the cylindrical platform feature body and the counterbore on the V-shaped bifurcated structure at one end of the H-shaped pressing plate (5). And the H-shaped pressing plate (5) is connected to the rotating connection support plate (4) through a thread pair. After assembly, the plane where the H-shaped pressing plate (5) is located and the plane where the rotating connection support plate (4) is located are perpendicular to each other.

4. The embracing four-axis tooling according to claim 3 is characterized in that: V-shaped grooves for the front catch parts of the locking buckle plate (6) to be embedded are provided on the outer sides of the two bifurcated heads at the other end of the H-shaped pressing plate (5).

5. The enveloping four-axis tooling according to claim 2 is characterized in that: Adjustable support pins (4-1) are provided on the rotating connection support plate (4).

6. The enveloping four-axis tooling according to claim 1, characterized in that: Two groups of hinge supports (6-1) are also fixedly connected to the four-axis indexing plate connecting plate (1) through a thread pair. The hinge hole provided at one end of the locking buckle plate (6) and the hinge hole provided at the top of the hinge support (6-1) are coaxially connected by a pin shaft to form a hinged structure. Axial retaining rings are also installed at both ends of the pin shaft.

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