CN113927654A - Method for processing special-shaped thin-wall nylon piece - Google Patents

Abstract

The invention discloses a processing method of a special-shaped thin-wall nylon part, which comprises the following steps: selecting a blank material for processing, the size of which is larger than that of the special-shaped thin-wall nylon piece to be processed; processing the semi-finished product outline of the special-shaped thin-wall nylon piece to be processed in the blank material to form a semi-finished product which is connected with the edge of the blank material into a whole, wherein a groove is formed between the semi-finished product outline and the edge of the blank material; injecting liquid paraffin into the groove of the semi-finished product; after the paraffin and the groove are solidified into a whole, forming an integrated solidified body by the semi-finished product and the paraffin, processing and forming a profile according to the shape requirement of the special-shaped thin-wall nylon piece to be processed, and forming a finished special-shaped thin-wall nylon piece in the solidified body; putting the special-shaped thin-wall nylon part finished product with the solidified body into a heating container for heating to melt paraffin; and taking the special-shaped thin-wall nylon piece out of the heating container to finally obtain the special-shaped thin-wall nylon piece. The deformation caused by processing and clamping is reduced, and the precision of each dimension and form and position tolerance after processing is ensured.

Description

Method for processing special-shaped thin-wall nylon piece

Technical Field

The invention relates to the field of manufacturing of special-shaped thin-wall type nylon parts, in particular to a method for processing a special-shaped thin-wall type precision nylon part.

Background

The nylon material has the most variety and the most extensive application in engineering plastics, and is widely applied to the fields of medical treatment, aviation, electronic equipment, mechanical equipment, semiconductor equipment, automobile manufacturing and the like. In application, some special-shaped thin-wall high-precision nylon parts are often needed, and due to the structural and material characteristics of the parts, the parts have poor strength and are very easy to generate machining deformation and clamping deformation in the machining process, so that the dimensional precision of the parts is influenced.

The existing processing and clamping method generally adopts a special profiling tool to clamp or compress, the dimensional precision is qualified in the processing process during clamping, the processing is in a clamping state during processing, the deformation of a product is serious after loosening, and the out-of-tolerance of the size and the form and position tolerance of a deformed part is serious.

For example, Chinese patent literature (publication date: 10/29/2014, publication number: CN 203900591U) discloses an anti-crack device in the processing of a special-shaped thin-wall nylon part, which comprises a T-shaped groove workbench and a clamp body, wherein the clamp body is fixed on the T-shaped groove workbench through a first bolt, a first nut, a first cushion block and a first pressing plate on the T-shaped groove workbench, and a workpiece positioning groove matched with the appearance of a workpiece is arranged on the clamp body; establish the filler block that corresponds with the last work piece constant head tank of anchor clamps body, the filler block includes rectangle centre gripping chamber, the holding surface who matches with the work piece inner chamber, and the filler block passes through second bolt, second nut and second cushion, the second clamp plate on the T-slot workstation to be fixed, and the second clamp plate presses on the wall in the rectangle centre gripping chamber of filler block.

The technical scheme is that the clamp body and the positioning piece are combined into a whole, the positioning and clamping mode is optimized, the structure is simplified to the maximum extent, the common line contact clamping mode is changed into a surface contact clamping mode, the contact area is increased, the clamping deformation is controlled, and the machining deformation is reduced, so that the cracking phenomenon of special-shaped thin-wall nylon corners in machining is prevented. This technique is still unable to avoid product deformation after the product is released from the process.

Disclosure of Invention

The invention aims to solve the problems of poor product precision and the like caused by serious processing deformation and clamping deformation of the existing special-shaped thin-wall nylon part, and provides a processing method of the special-shaped thin-wall nylon part, which can be used for clamping by using an existing clamping tool, can be used for processing in an existing data processing center, can effectively avoid the processing deformation and the clamping deformation of the product and ensures high processing precision.

The invention adopts the technical scheme that the invention achieves the aim that: the processing method of the special-shaped thin-wall nylon piece comprises the following steps:

step 1: selecting a blank material for processing, the size of which is larger than that of the special-shaped thin-wall nylon piece to be processed;

step 2, processing the contour of a semi-finished product of the special-shaped thin-wall nylon piece to be processed in the blank material in thestep 1 to form a semi-finished product which is connected with the edge of the blank material into a whole, and forming a groove between the contour of the semi-finished product and the edge of the blank material;

and step 3: injecting paraffin into the groove of the semi-finished product in thestep 2;

and 4, step 4: after the paraffin and the groove are solidified into a whole, forming an integrated solidified body by the semi-finished product and the paraffin, processing and forming a contour according to the shape requirement of the special-shaped thin-wall nylon piece to be processed, and forming a finished special-shaped thin-wall nylon piece in the solidified body;

and 5: putting the special-shaped thin-wall nylon part finished product with the solidified body in the step 4 into a heating container for heating so as to melt the paraffin;

step 6: and taking the special-shaped thin-wall nylon piece out of the heating container to finally obtain the special-shaped thin-wall nylon piece.

The processing method of the special-shaped thin-wall nylon part aims at the problem that clamping and processing are easy to deform in the prior art, utilizes the characteristics that paraffin is low in melting point and easy to melt and solidify and the characteristics that paraffin can be solidified with nylon parts into a whole, firstly selects a blank material with the integral size larger than that of the special-shaped thin-wall nylon part to be processed, fixes the blank material on a clamping fixture, processes the semi-finished product outline of the special-shaped thin-wall nylon part to be processed and formed in the blank material through a data processing center, generally selects a relatively complex outline which is difficult to process as a semi-finished product outline, can better improve the processing precision, after the semi-finished product outline is processed, the semi-finished product and the blank material edge are connected into a whole, namely, a groove is formed between the semi-finished product outline and the blank material edge, namely a groove is formed, so that paraffin which can be solidified with the nylon part into a whole can be conveniently filled in the groove, the semi-finished product and the blank edges are connected into a whole in the process of curing the liquid paraffin, so that a solid clamping body is formed, the subsequent processing can be realized only by clamping the blank edges, the deformation cannot be generated in the processing process, and the clamping deformation cannot be generated after the processing. After the paraffin and the groove are solidified into a whole, the semi-finished groove is changed into a solid, the strength is improved, and then the blank material with the semi-finished product is turned over and installed on a clamping tool, so that the deformation caused by clamping force is reduced. The precision of each dimension and form and position tolerance of the special-shaped thin-wall precision nylon piece after processing is ensured. The numerical control machining center is utilized to machine and form a contour according to the shape requirement of the special-shaped thin-wall nylon piece to be formed, namely the unprocessed part of the special-shaped thin-wall nylon piece to be formed, a finished special-shaped thin-wall nylon piece to be processed is formed in a solidified body formed by a blank material edge and paraffin, at the moment, the finished special-shaped thin-wall nylon piece is completely positioned in the solidified body, a blank edge is clamped by a clamping fixture, and thus after the finished product is detached from the clamping fixture, the finished special-shaped thin-wall nylon piece, the blank and the solidified body are still in an integrated structure, the finished product cannot deform, the machining precision is guaranteed, and high-precision machining is realized. And finally, putting the finished product of the special-shaped thin-wall nylon piece, the blank and the solidified body into a heating container for heating to melt paraffin, and taking out the finished product of the special-shaped thin-wall nylon piece to finish the processing of the whole finished product of the special-shaped thin-wall nylon piece. The operation is extremely convenient, the whole processing is finished in a solid structure state, the processing deformation can not be generated, the clamping part is a blank edge, the contact with a product can not be generated, the clamping deformation and other phenomena can not be generated. The machining precision is greatly improved, a special clamping fixture does not need to be designed, and the existing numerical control machining center does not need to be changed, so that the machining of the special-shaped thin-wall nylon part is more convenient and simpler, and meanwhile, the machining cost is greatly reduced.

Preferably, the semi-finished product profile in thestep 2 is an external profile or an internal profile of the profiled thin-walled nylon piece to be molded. The semi-finished product profile can be the external profile of the special-shaped thin-wall nylon piece to be molded or the internal profile of the special-shaped thin-wall nylon piece to be molded, and in general, the profile difficult to machine is preferentially selected as the semi-finished product profile to be machined for the first time, so that the machining precision can be better improved.

Preferably, the paraffin wax is natural paraffin wax or artificial paraffin wax. Paraffin can be natural paraffin also can select artificial paraffin, mainly utilizes the melting point of paraffin low, and is odorless tasteless, can condense characteristic as an organic whole with nylon spare at the solidification in-process simultaneously, makes things convenient for liquidization and solidification, also conveniently can control at effectual heating temperature at subsequent heating process, guarantees can not cause the influence to nylon spare at heating process, and paraffin is with low costs moreover, can recycle repeatedly, and is pollution-free.

Preferably, the shaped profile in step 4 is an internal or external profile of the semi-finished product. The forming contour is the contour of the second processing, namely the contour of the last forming, in the previous step, if the outer contour is selected as the semi-finished contour, the forming contour is the inner contour, if the inner contour is selected as the semi-finished contour, the forming contour is the outer contour, and how to select the forming contour is specifically determined according to the shape of the special-shaped thin-wall nylon piece to be processed, the semi-finished contour and the forming contour selected by different structural shapes are different from each other, so as to guarantee the processing precision to the maximum.

Preferably, the paraffin and the trough are naturally solidified in the step 4. The paraffin is naturally solidified, and the paraffin is extremely easy to solidify in a natural state due to the low melting point of the paraffin, so that the running-water type operation can be realized in a mode of sequentially realizing the processing of the previous batch and the solidification of the next batch in the batch processing process, the waste of time is not caused, an additional solidification device is not required for solidification, the operation is convenient and rapid, and the cost is low.

Preferably, the heating container instep 5 is filled with a heating liquid. The heating container is preferably heated by boiled water, and the special-shaped thin-wall nylon piece can be taken out only by heating the boiled water to melt the paraffin to finish the processing.

Preferably, the special-shaped thin-wall nylon piece is processed and molded in a numerical control machining center. The special-shaped thin-wall nylon part can be machined in the existing numerical control machining centers such as milling and turning without additionally arranging a clamping fixture and changing machining equipment.

The invention has the beneficial effects that: according to the processing method of the special-shaped thin-wall precision nylon part, after the workpiece is processed in the first step, molten paraffin is poured into a cut groove of a semi-finished nylon part, after the paraffin is solidified and is bonded with the semi-finished nylon part into a whole, the semi-finished nylon part becomes solid after the paraffin is filled, the strength is improved, deformation caused by clamping force is reduced, and the precision of various dimensions and form and position tolerances after the special-shaped thin-wall precision nylon part is processed is guaranteed. The operation is extremely convenient, the whole processing is finished in a solid structure state, the processing deformation can not be generated, the clamping part is a blank edge, the contact with a product can not be generated, the clamping deformation and other phenomena can not be generated. The machining precision is greatly improved, a special clamping fixture does not need to be designed, and the existing numerical control machining center does not need to be changed, so that the machining of the special-shaped thin-wall nylon part is more convenient and simpler, and meanwhile, the machining cost is greatly reduced.

Drawings

FIG. 1A is a schematic structural diagram of the profiled thin-walled nylon part of the invention;

FIG. 1B is a top view of the profiled thin-walled nylon part of the present invention;

FIG. 2A is a schematic structural diagram of a blank for processing profiled thin-walled nylon parts according to the present invention;

FIG. 2B is a bottom view of the blank for processing profiled thin-walled nylon parts according to the present invention;

FIG. 3A is a schematic structural diagram of a semi-finished product after the first processing of the profiled thin-walled nylon part of the invention;

FIG. 3B is a top view of the semi-finished product after the first processing of the profiled thin-walled nylon part of the invention;

FIG. 3C is a schematic structural view of the semi-finished product of the invention, in which paraffin is solidified with the semi-finished product in the groove after the first processing;

FIG. 3D is a top view of the semi-finished product of the invention, after the first processing, paraffin wax in the semi-finished product of the invention is solidified with the semi-finished product;

FIG. 4A is a schematic view of the paraffin wax of the present invention after being solidified and bonded with a nylon semi-product, and then turned over for processing;

FIG. 4B is a top view of the paraffin wax of the present invention after being solidified and bonded with a nylon semi-product, and turned over for processing;

FIG. 5A is a schematic structural view of the solidified paraffin wax of the present invention after being bonded with a nylon semi-product and formed by a turning process;

FIG. 5B is a top view of the solidified paraffin wax of the present invention bonded to a nylon semi-finished product and then turned over for forming;

in the figure: 1. 2, semi-finished product outline, 3, blank edge, 4, semi-finished product, 5, profiled groove, 6, paraffin, 7, forming outline, 8, solidified body, 9, special-shaped thin-wall nylon part finished product, and 10, special-shaped thin-wall nylon part.

Detailed Description

Various aspects of the invention are described in detail below with reference to specific embodiments and with reference to the following figures.

Example 1:

in the embodiment shown in fig. 1A and 1B, a profiled thin-walled nylon member 10 is a thin-walled groove member that is approximately irregular and oval, the thin-walled precision nylon member has a length of 100mm and a width of 68mm, a wall thickness of 2mm, a profile tolerance requirement of 0.05, and a high dimensional precision requirement; therefore, for the processing method of the special-shaped thin-wall nylon part, the outline of the special-shaped thin-wall nylon part is selected as the outline of the semi-finished product, the fixing method needs to fill liquid paraffin in a groove between the semi-finished product with the semi-finished product processed in the first step and the blank material edge, and after the liquid paraffin and the semi-finished product are solidified into a whole, the clamping fixture is used for clamping the blank material edge and then carrying out subsequent processing, so that the strength of the part is improved, and the deformation caused by the clamping force during clamping is greatly reduced. The specific processing method comprises the following steps:

step 1: selecting ablank material 1 for processing, the size of which is larger than that of the special-shaped thin-wall nylon piece to be processed, namely selecting a nylon block blank material with the length of 118mm and the width of 118mm as shown in figures 2A and 2B;

step 2: as shown in fig. 3A and 3B, asemi-finished product contour 2 of the profiled thin-walled nylon piece to be molded is processed inside the blank 1 instep 1 to form a semi-finished product 4 connected with theblank edge 3 into a whole, and a profiledgroove 5 is formed between thesemi-finished product contour 2 and theblank edge 3;

and step 3: melting the paraffin block into liquid paraffin by using a heating container, and pouring the melted liquid paraffin into the semi-finishedproduct type groove 5 in thestep 2; the paraffin wax is melted at 47-64 ℃, the melt is very convenient to heat, and no peculiar smell or pollution is caused;

and 4, step 4: as shown in fig. 3C and 3D, after theparaffin 6 is solidified with the groove, the liquid paraffin forms solid paraffin, the semi-finished product 4 and the solid paraffin form an integrated solidifiedbody 8, theprofile 7 is processed and formed according to the shape requirement of the profiled thin-walled nylon piece to be processed, and a profiled thin-walled nylon piece finishedproduct 9 is formed inside the solidifiedbody 8;

as shown in fig. 4A and 4B, a semi-finished nylon part withparaffin 6 and a semi-finished product 4 with ablank edge 3 integrated is turned over, theblank edge 3 is clamped by a clamping fixture, and acontour 7 is machined and formed in a numerical control machining center according to the shape requirement of the special-shaped thin-wall nylon part to be formed; as shown in fig. 5A and 5B, afinished product 9 of the special-shaped thin-walled nylon part to be processed is formed inside a solidifiedbody 8 formed by the blank material edge and paraffin;

and 5: putting the special-shaped thin-wall nylon part finishedproduct 9 with the solidifiedbody 8 in the step 4 into a heating container for heating so as to melt theparaffin 6;

step 6: and taking the finished profiled thin-wall nylon part 9 out of the heating container to finally obtain the profiled thin-wall nylon part shown in figures 1 and 2.

According to the processing method of the special-shaped thin-wall nylon part, according to the structure of the part, after the workpiece is processed in the first step, molten paraffin is filled into a cut groove of a semi-finished nylon part, and after the paraffin is solidified, the nylon part is bonded into a whole. The nylon part becomes solid after paraffin filling, and the strength is improved, so that the deformation caused by clamping force is reduced. Finally, the precision of each dimension and form and position tolerance of the special-shaped thin-wall precision nylon piece after processing is ensured. The method overcomes the major processing technical problem existing in the processing of the special-shaped thin-wall precise nylon piece. The problem of the manufacturing process of the semiconductor equipment is solved, and the precision of the special-shaped thin-wall nylon piece is effectively improved.

The processing method of the special-shaped thin-wall nylon part aims at the problem that clamping and processing are easy to deform in the prior art, utilizes the characteristics of low melting point, easy melting and solidification of paraffin and the characteristic of being capable of being solidified with the nylon part into a whole, firstly selects a blank material with the integral size larger than the size of the special-shaped thin-wall nylon part to be processed, fixes the blank material on a clamping fixture, processes the semi-finished product outline of the special-shaped thin-wall nylon part to be processed and formed in the blank material through a data processing center, generally selects a relatively complex outline which is difficult to process as a semi-finished product outline, can better improve the processing precision, and after the semi-finished product outline is processed, the semi-finished product and the blank material edge are connected into a whole, namely, only can be connected into a whole to form a groove between the semi-finished product outline and the blank material edge, namely a groove, so as to conveniently fill the paraffin in the groove, the semi-finished product and the blank edges are connected into a whole in the curing process of the paraffin, so that a solid clamping body is formed, the subsequent processing can be realized only by clamping the blank edges, the deformation cannot be generated in the processing process, and the clamping deformation cannot be generated after the processing. After the paraffin and the groove are solidified into a whole, the semi-finished groove is changed into a solid, the strength is improved, and then the blank material with the semi-finished product is turned over and installed on a clamping tool, so that the deformation caused by clamping force is reduced. The precision of each dimension and form and position tolerance of the special-shaped thin-wall precision nylon piece after processing is ensured. The numerical control machining center is utilized to machine and form a contour according to the shape requirement of the special-shaped thin-wall nylon piece to be formed, namely the unprocessed part of the special-shaped thin-wall nylon piece to be formed, a finished special-shaped thin-wall nylon piece to be processed is formed in a solidified body formed by a blank material edge and paraffin, at the moment, the finished special-shaped thin-wall nylon piece is completely positioned in the solidified body, a blank edge is clamped by a clamping fixture, and thus after the finished product is detached from the clamping fixture, the finished special-shaped thin-wall nylon piece, the blank and the solidified body are still in an integrated structure, the finished product cannot deform, the machining precision is guaranteed, and high-precision machining is realized. And finally, putting the finished product of the special-shaped thin-wall nylon piece, the blank and the solidified body into a heating container for heating to melt paraffin, and taking out the finished product of the special-shaped thin-wall nylon piece to finish the processing of the whole finished product of the special-shaped thin-wall nylon piece. The operation is extremely convenient, the whole processing is finished in a solid structure state, the processing deformation can not be generated, the clamping part is a blank edge, the contact with a product can not be generated, the clamping deformation and other phenomena can not be generated. The machining precision is greatly improved, a special clamping fixture does not need to be designed, and the existing numerical control machining center does not need to be changed, so that the machining of the special-shaped thin-wall nylon part is more convenient and simpler, and meanwhile, the machining cost is greatly reduced.

The paraffin adopted in the processing method of the special-shaped thin-wall nylon piece is only an optimal choice in the application, and the paraffin can be replaced by other hydrocarbon mixtures which have low melting points and can be solidified together with the nylon piece, so long as the liquid filling can be realized, and the paraffin can be solidified into a whole with the nylon piece after being solidified, so that the purposes of no deformation during processing and no deformation during clamping can be realized.

It should be noted that the above describes exemplifying embodiments of the invention. It will be understood by those skilled in the art, however, that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims. Based on the embodiments described in the present invention, all other embodiments obtained by those skilled in the art based on the technical solutions of the present application without any creative work shall fall within the protection scope of the present invention.

Claims (7)

1. A processing method of a special-shaped thin-wall nylon part is characterized by comprising the following steps:

step 1: selecting a blank material (1) for processing, the size of which is larger than that of the special-shaped thin-wall nylon piece to be processed;

step 2, processing a semi-finished product outline (2) of the special-shaped thin-wall nylon piece to be processed in the blank (1) in the step 1 to form a semi-finished product (4) which is connected with the blank edge (3) into a whole, and forming a groove (5) between the semi-finished product outline (2) and the blank edge (3);

and step 3: injecting paraffin into the semi-finished product of the step 2 in the groove (5);

and 4, step 4: after the paraffin and the groove (5) are solidified into a whole, the semi-finished product and the paraffin form an integrated solidified body (8), the contour (7) is processed and formed according to the shape requirement of the special-shaped thin-wall nylon piece to be processed, and a finished special-shaped thin-wall nylon piece (9) is formed inside the solidified body (8);

and 5: putting the special-shaped thin-wall nylon part finished product (9) with the solidified body (8) in the step (4) into a heating container for heating to melt the paraffin;

step 6: and taking the finished special-shaped thin-wall nylon part (9) out of the heating container to finally obtain the special-shaped thin-wall nylon part (10).

2. The processing method of the profiled thin-wall nylon part as claimed in claim 1, wherein the processing method comprises the following steps: and (3) the semi-finished product profile (2) in the step (2) is an external profile or an internal profile of the special-shaped thin-wall nylon piece to be molded.

3. The processing method of the profiled thin-wall nylon part as claimed in claim 1, wherein the processing method comprises the following steps: the paraffin is natural paraffin or artificial paraffin.

4. The processing method of the profiled thin-wall nylon part as claimed in claim 1, wherein the processing method comprises the following steps: the shaping contour (7) in step 4 is the inner contour or the outer contour of the semi-finished product.

5. The processing method of the profiled thin-wall nylon part as claimed in claim 1, wherein the processing method comprises the following steps: and 4, naturally solidifying the paraffin and the groove.

6. The processing method of the profiled thin-wall nylon part as claimed in any one of claims 1 to 5, wherein the processing method comprises the following steps: the heating container in the step 5 is filled with heating liquid.

7. The processing method of the profiled thin-wall nylon part as claimed in any one of claims 1 to 5, wherein the processing method comprises the following steps: the special-shaped thin-wall nylon part is processed and molded in a numerical control machining center.

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