CN219113419U - Length cutting device for inner cover of ultrathin ellipsoidal hood - Google Patents

Abstract

The utility model discloses an ultrathin ellipsoidal hood inner cover length cutting device which comprises a positioning component and a clamping component, wherein the positioning component is connected with a rotating component, the clamping component is connected with a center component, the positioning component comprises a semi-ellipsoidal positioning core body with the shape matched with that of a hood, the clamping component comprises a pressing block and a pressing head matched with the pressing block, a lightening hole is formed in the semi-ellipsoidal positioning core body, and a first communication hole is formed between the lightening hole Kong Jian and the top of the semi-ellipsoidal positioning core body. The pressing block comprises a bowl-shaped hole and a round hole communicated with the bowl-shaped hole. The periphery of the pressing block is sequentially enlarged from the end close to the semi-ellipsoidal positioning core body to the end far from the semi-ellipsoidal positioning core body. The top end of the pressing head is provided with a first taper hole matched with the pressing block, and a second taper hole opposite to the first taper hole and a transition round hole connected with the second taper hole and a mounting taper hole connected with the transition round hole are sequentially arranged in the pressing head. Solves the problems of inconvenient clamping and difficult taking out in the processing of the existing ultrathin curved surface product.

Description

Length cutting device for inner cover of ultrathin ellipsoidal hood

Technical Field

The utility model relates to the field of curved surface product processing clamps, in particular to an ultrathin ellipsoidal hood inner cover cutting length device.

Background

The hood inner cover is formed by stamping a thin steel plate, and after stamping forming, the opening part has a circle of redundant burrs such as a crack, a ripple or a fold, so that a larger cutting allowance can be reserved during blanking. When cutting, if the wall thickness is enough, the workpiece can be directly clamped for processing if the shape is regular. However, for ultra-thin (thickness less than 1 mm) irregularly-shaped workpieces, deformation or loosening displacement of the hood inner cover is easily caused during clamping, so that deviation of the cutting length dimension occurs. Therefore, special fixture and cutting method are needed to be adopted according to the shape of the workpiece so as to ensure the product quality. The Chinese patent with the bulletin number of CN202952079U discloses a clamp for processing the thickness outer circular surface of a spherical shell, which comprises a front end positioning device and a back tip, wherein the front end positioning device consists of a fastener, an adjusting sleeve, a spring, a movable mandrel and a Morse taper sleeve, the center of the Morse taper sleeve is provided with a through hole matched with the movable mandrel, the rear end of the movable mandrel is smaller than the front end, a step formed by the movable mandrel is a fixed seat of the spring, the tail end of the movable mandrel is a screw matched with the fastener, the movable mandrel is filled into the Morse taper sleeve from the tail end and then is filled into the spring and the adjusting sleeve, the front end positioning device is formed by fixing the fastener, the shape of the upper surface of the movable mandrel is a spherical surface matched with the outer convex surface of a part to be processed, the distance between the bottom end of the spherical surface of the movable mandrel and the upper surface of the Morse taper sleeve is larger than the distance from the positioning surface of the part to the top end of the outer convex spherical surface of the part to be processed, the back tip consists of a tip sleeve and a tip, and the shape of the tip is the same as the inner surface of the part to be processed. The clamping and centering problems of the spherical workpiece are effectively solved. However, in the positioning process, the top tip is attached to the product, so that the air cannot be exhausted, the hood inner cover is easily deformed due to the fact that the attachment is not in place, and meanwhile, the hood inner cover is easily sucked at the top tip after being cut off, so that the hood inner cover is inconvenient to take off.

Disclosure of Invention

The utility model aims to provide an inner cover cutting length device of an ultrathin ellipsoidal hood, which aims to solve the problems that the existing ultrathin curved surface product is inconvenient to clamp and difficult to take out during processing.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a length device is cut to ultra-thin ellipsoidal hood inner cover, includes locating component and clamping assembly, locating component is connected with rotating assembly, clamping assembly is connected with top subassembly, locating component includes the half ellipsoidal location core that shape and hood match, clamping assembly includes briquetting and compresses tightly the head with briquetting complex, the inside lightening hole that is provided with of half ellipsoidal location core, be provided with first connecting hole between lightening hole Kong Jian and the half ellipsoidal location core top.

As a further improvement of the above technical scheme:

the pressing block comprises a bowl-shaped hole and a round hole communicated with the bowl-shaped hole. The briquetting is truncated cone rubber spare, and frock self warp when pressing from both sides tightly can protect the product, increases friction simultaneously, makes clamping assembly and locating component synchronous completely.

The periphery of the pressing block is sequentially enlarged from the end close to the semi-ellipsoidal positioning core body to the end far from the semi-ellipsoidal positioning core body. The cross section of the workpiece is similar to a trapezoid, the top wall is thinner and easy to compress and deform, and the workpiece can be well attached to the outer surface of an ellipsoid of the workpiece when axially compressed, so that the friction force between the workpiece and the ellipsoid is increased. The bottom is thicker and has large buffer, so that the quality of the workpiece can be well ensured.

The top end of the pressing head is provided with a first taper hole matched with the pressing block, and a second taper hole opposite to the first taper hole and a transition round hole connected with the second taper hole and a mounting taper hole connected with the transition round hole are sequentially arranged in the pressing head. The compression head is a hollow stepped cylindrical shaft, a taper hole is formed in the large end of the compression head in a turned mode, the taper beta is smaller, and a tool retracting groove is formed in the inner end face of the compression head. The inside diameter of the taper hole is large, and the diameter of the opening is smaller, so that the pressing block is not easy to fall out after being pressed in. The tool retracting groove is used for storing glue, so that the pressing block and the pressing head are firmly adhered. The center of the end face of the tool withdrawal groove is provided with a taper hole, so that the workpiece can be prevented from touching the pressing head when being pressed inwards. The middle is a round hole transition, the inner hole at the small end is a taper hole and a round hole for installation of the rotary top tip, and the taper gamma and the diameter d of the round hole are in smaller clearance fit with the rotary top tip. When the workpiece is pressed, the workpiece rotates together with the pressing block and the pressing head under the action of friction force, and the pressing head rotates together with the head of the center assembly. The tip assembly comprises a head and a cone, wherein a thrust ball bearing and a deep groove ball bearing are connected between the head and the cone, can bear axial load and radial load respectively, and can keep the cone relatively static when the tip rotates. The structure of the center assembly is a lathe normal structure, which is not described here, and the cone is arranged in the lathe tailstock to do axial linear motion along with the tailstock. The transition round hole is connected with a second coupling through hole, so that the internal air surrounded by the hood inner cover, the pressing block, the pressing head and the head of the center assembly during clamping can be communicated with the external atmosphere, negative pressure is avoided during disassembly, and the assembly and the disassembly are smooth.

The semi-ellipsoidal positioning core body is provided with an annular avoidance groove.

And a gluing layer used for connecting the pressing head and the pressing block is arranged in the tool retracting groove.

Compared with the prior art, the utility model has the beneficial effects that:

the length cutting device for the inner cover of the ultrathin ellipsoidal hood is novel and ingenious in conception, convenient and quick to use, maintain and operate and high in production efficiency. The device has simple structure and low manufacturing cost, and is suitable for popularization and mass production. The semi-ellipsoidal positioning surface is consistent with the internal appearance and dimension of the inner hood of the hood, the machining precision is higher than that of the inner hood of the hood, deformation caused by difficult clamping caused by complex shape and thin wall of the inner hood of the hood in the clamping process is avoided through the first connecting through hole and the second connecting through hole, the machining length dimension of the product is accurate, and the quality of the product is better ensured.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a positioning assembly according to the present utility model;

FIG. 3 is a schematic diagram of the structure of the pressing block of the utility model;

fig. 4 is a schematic view of the structure of the pressing head of the present utility model.

Reference numerals: 1. a positioning assembly; 11. a semi-ellipsoidal positioning core; 111. an annular avoidance groove; 12. a lightening hole; 13. a first communication hole; 2. a clamping assembly; 21. briquetting; 211. a bowl-shaped hole; 212. a round hole; 22. a compacting head; 221. a tool retracting groove; 222. a second coupling through hole; 223. a glue layer; 3. a rotating assembly; 4. a tip assembly; 10. an inner hood of the hood; 20. and (5) cutting off the knife.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 2, the length device is cut to ultra-thin ellipsoidal hood inner cover of this embodiment, including locating component 1 and clamping component 2, locating component 1 is connected with rotating component 3, and clamping component 2 is connected with top subassembly 4, and locating component 1 includes half ellipsoidal location core 11 that shape and hood match, and clamping component 2 includes briquetting 21 and compresses tightly head 22 with briquetting 21 complex, and half ellipsoidal location core 11 inside is provided with lightening hole 12, is provided with first communication hole 13 between lightening hole 12 pore point and half ellipsoidal location core 11 top. The gas between the outer surface of the semi-ellipsoidal positioning core 11 and the inner hood 10 can be discharged in time to be communicated with the atmosphere when the semi-ellipsoidal positioning core is attached, so that the deformation of the inner hood 10 caused by the fact that the semi-ellipsoidal positioning core is not attached in place when the semi-ellipsoidal positioning core is clamped is avoided, or the inner hood 10 is sucked on the semi-ellipsoidal positioning core 11 after the semi-ellipsoidal positioning core is cut off, and the semi-ellipsoidal positioning core is difficult to take off smoothly.

As shown in fig. 3, the pressing block 21 includes a bowl-shaped hole 211 and a circular hole 212 communicating with the bowl-shaped hole 211.

The periphery of the pressing block 21 sequentially expands from the end close to the semi-ellipsoidal positioning core 11 to the end far from the semi-ellipsoidal positioning core 11. As shown by the angle beta in the figure, the angle beta ranges from 5 deg. -30 deg..

As shown in fig. 4, a first taper hole matched with the pressing block 21 is formed in the top end of the pressing head 22, a second taper hole opposite to the first taper hole is sequentially formed in the pressing head 22, a transition round hole connected with the second taper hole, and a mounting taper hole connected with the transition round hole. The inside diameter of the taper hole is large, and the diameter of the opening is smaller, so that the pressing block 21 is not easy to fall out after being pressed in. The inner end surface of the pressing head 22 is provided with a tool retracting groove 221. A glue layer 223 for connecting the pressing head 22 and the pressing block 21 is provided in the relief groove 221. The tool retracting groove 221 is used for storing glue, so that the pressing block 21 and the pressing head 22 are firmly adhered to the transition round hole, and a second connecting hole 222 is connected. The second coupling hole 222 communicates the air inside the hood 10, the pressing block 21, the pressing head 22, and the head of the center assembly 4 with the outside air when clamping, and allows smooth attachment and detachment.

The tip assembly 4 is provided with a thrust ball bearing and a deep groove ball bearing which are connected, can bear axial load and radial load respectively, and can keep the cone relatively static when the cone tip rotates.

The semi-ellipsoidal positioning core 11 is provided with an annular avoiding groove 111. The width of the annular avoidance groove 111 is larger than that of the cutting knife 20, and the dimension of the end surface of the avoidance groove close to the top of the ellipsoid, which is far from the top, is smaller than L. Next to the annular relief groove 111 there is a small section of cylinder for positioning and support during cutting.

The working principle of the utility model is as follows:

when the semi-ellipsoidal positioning core 11 is used, the tail end of the semi-ellipsoidal positioning core 11 is inserted into the rotating assembly 3, the rotating assembly 3 is selected as a three-jaw chuck, a machine tool rotating part is not shown, the rotating assembly 3 is slightly stirred, whether the runout tolerance of the ellipsoidal surface of the semi-ellipsoidal positioning core 11 is within an allowable range or not is checked, and the semi-ellipsoidal positioning core 11 is aligned. And then the semi-finished product of the blast cap inner cover 10 formed by stamping is sleeved on the semi-ellipsoidal surface, and the position is adjusted to ensure that the semi-finished product is completely and fully attached to the ellipsoidal surface of the semi-ellipsoidal positioning core 11. And then the pressing head 22 provided with the pressing block 21 is sleeved on the center assembly 4 of the lathe tailstock. The compression head 22 is forced axially to rotate while observing whether the tip assembly 4 rotates in synchronization with the compression head 22. Then, the tailstock is axially moved toward the lathe headstock, and the press block 21 on the press head 22 is pressed against the hood inner 10. And starting the rotation of the lathe spindle, and observing whether the semi-finished product of the hood inner cover 10, the compression head 22 and the center assembly 4 synchronously rotate along with the semi-ellipsoidal positioning core 11. After ensuring the free running, the slide carriage is moved laterally toward the lathe headstock, and after reaching the position of the length dimension L of the hood inner 10, the cutter 20 is moved linearly in the longitudinal direction until the hood inner is cut. And then, turning off the lathe spindle, sequentially returning the slide carriage box and the tailstock to the starting position, and taking down the hood inner cover to finish the whole cutting process.

The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. The utility model provides a length device is cut to ultra-thin ellipsoidal hood inner cover, includes locating component (1) and clamping component (2), its characterized in that: the locating component (1) is connected with the rotating component (3), the clamping component (2) is connected with the top component (4), the locating component (1) comprises a semi-ellipsoidal locating core body (11) with the shape matched with a blast cap, the clamping component (2) comprises a pressing block (21) and a pressing head (22) matched with the pressing block (21), a lightening hole (12) is formed in the semi-ellipsoidal locating core body (11), and a first communication hole (13) is formed between the lightening hole (12) Kong Jian and the top of the semi-ellipsoidal locating core body (11).

2. The ultra-thin ellipsoidal hood inner shroud length device of claim 1, wherein: the pressing block (21) comprises a bowl-shaped hole (211) and a round hole (212) communicated with the bowl-shaped hole (211).

3. The ultra-thin ellipsoidal hood inner shroud length device of claim 2, wherein: the periphery of the pressing block (21) is sequentially enlarged from the end close to the semi-ellipsoidal positioning core body (11) to the end far from the semi-ellipsoidal positioning core body (11).

4. The ultra-thin ellipsoidal hood inner shroud length device of claim 3, wherein: the top end of the pressing head (22) is provided with a first taper hole matched with the pressing block (21), and a second taper hole opposite to the first taper hole and a transition round hole connected with the second taper hole and a mounting taper hole connected with the transition round hole are sequentially arranged in the pressing head (22).

5. The ultra-thin ellipsoidal hood inner shroud length device of claim 4, wherein: the inner end surface of the pressing head (22) is provided with a tool retracting groove (221).

6. The ultra-thin ellipsoidal hood inner shroud length device of claim 5, wherein: and a second coupling through hole (222) is connected to the transition round hole.

7. The ultra-thin ellipsoidal hood inner shroud length device of claim 6, wherein: an annular avoidance groove (111) is formed in the semi-ellipsoidal positioning core body (11).

8. The ultra-thin ellipsoidal hood inner shroud length device of claim 7, wherein: a gluing layer (223) for connecting the pressing head (22) and the pressing block (21) is arranged in the tool retracting groove (221).

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