CN110369974B - Sheet metal part machining process - Google Patents
Sheet metal part machining process Download PDFInfo
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- CN110369974B CN110369974B CN201910801251.2A CN201910801251A CN110369974B CN 110369974 B CN110369974 B CN 110369974B CN 201910801251 A CN201910801251 A CN 201910801251A CN 110369974 B CN110369974 B CN 110369974B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention belongs to the technical field of machining, and particularly relates to a sheet metal part machining process which comprises an extrusion block, an extrusion table, an installation groove, a height-adjusting bolt, a sliding groove and an air-extracting piston cylinder, wherein the extrusion block is provided with a plurality of extrusion holes; the top of the extrusion table is provided with a sliding groove; the bottom of the air-extracting piston cylinder is fixedly connected to the bottom side of the inner part of the extrusion table lifting groove, and the top end of the sliding rod of the air-extracting piston cylinder is fixedly connected to the bottom of the bending table. According to the invention, the sheet metal part is pre-bent and pressed on the same processing machine, the sheet metal part is pre-bent by the bending blade at the top, so that the side edge of the sheet metal part needing pressing can be folded firstly, then the pre-bent sheet metal part is placed on the extrusion table for extrusion pressing, and the pressing action is formed at one time, so that the condition that the pressing mark appears on the surface of the pressing edge is avoided, meanwhile, the time required by pressing the edge is shortened, the processing efficiency of the sheet metal part is increased, and the possibility of the problems of incomplete pressing and the like of the pressing edge of the sheet metal part is greatly reduced by one-time pressing.
Description
Technical Field
The invention belongs to the technical field of machining, and particularly relates to a sheet metal part machining process.
Background
Along with the industrialization process, the demand of mechanical parts is increasing, wherein the sheet metal part processing is an important part, in the sheet metal part processing technology, the side edge of the sheet metal part is often required to be pressed to meet the special part function or appearance requirement of the sheet metal part, because the sheet metal part needs to be pre-bent at the side edge in the pressing process, and then the bending position is pressed to form a flat pressing edge, in the existing sheet metal part processing technology, the processing machinery required by two steps is generally separated, and the side edge of the sheet metal part is pressed for multiple times in a segmentation manner to form the pressing edge, the design manner is not favorable for improving the processing efficiency of the sheet metal part on one hand, on the other hand, the problems of surface indentation or incomplete pressing of the sheet metal part and the like are probably caused by the multi-segment pressing manner, and finally, the design manner is not favorable for reducing the cost, causing unnecessary waste.
In view of the problems, the sheet metal part is pre-bent by the bending blade at the top, so that the side edge of the sheet metal part needing edge pressing can be folded firstly, then the pre-bent sheet metal part is placed on the extrusion table for extrusion edge pressing, and the edge pressing action is formed at one time, so that the condition that the surface of the edge pressing is indented is avoided, meanwhile, the time required by edge pressing is shortened, the processing efficiency of the sheet metal part is increased, the edge pressing is formed at one time, the error probability of edge pressing is reduced, and the possibility of the problems of incomplete edge pressing and the like of the sheet metal part is solved.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems, the sheet metal part processing technology provided by the invention has the advantages that the pre-bending process part and the extrusion part of the sheet metal blank holder are arranged on the same machine, so that the sheet metal part processing efficiency is increased, the cost is reduced, and the blank holder defective products are greatly reduced in the blank holder one-step forming mode.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a sheet metal part machining process, which comprises the following steps:
s1: the sheet metal part is subjected to preliminary cutting and flattening, so that the side edge needing to be subjected to edge pressing is not blocked and is kept flat, and the influence on the quality of the final sheet metal part edge pressing caused by the blocking of other parts during edge pressing is avoided;
s2: measuring a sheet metal part, placing the sheet metal part on a bending table of a blank pressing instrument, positioning the sheet metal part through an auxiliary positioning jig on the instrument, starting the blank pressing instrument to pre-bend the sheet metal part after the sheet metal part is fixed, and bending the side edge of the sheet metal part needing blank pressing into an acute angle;
s3: taking out the bent sheet metal part, placing the sheet metal part on an extrusion table of a blank pressing instrument, fixing the sheet metal part by using an auxiliary fixing jig on the instrument, and starting the blank pressing instrument to extrude the bent side edge of the sheet metal part to enable the side edge to form a blank pressing;
s4: after the edge pressing is finished, taking out the sheet metal part, carrying out visual evaluation and accurate measurement on the sheet metal part, confirming the yield of the edge pressing, and carrying out grinding, re-extrusion or registration scrapping treatment on the defective parts such as burrs or indentations formed by the edge pressing;
the blank pressing instrument used in S2 and S3 comprises a bending blade, a bending table, a V-shaped groove, a pressing block, a pressing table, a sliding groove and an air-extracting piston cylinder; the bending blade is arranged at the bottom of the hydraulic cylinder; the upper surface of the bending table is provided with a V-shaped groove, and the position of the V-shaped groove corresponds to the position of the bending blade; the bending table is of an inverted L-shaped structure, the extending part of the upper end of the bending table corresponds to one end of the top of the extrusion table, and the top of the extrusion table is provided with a sliding groove at the corresponding position; the other end of the top of the extrusion table is provided with a lifting groove; the bottom of the bending table is fixedly connected to the top of the hydraulic cylinder, and the bottom of the hydraulic cylinder is fixed to the bottom side of the inner part of the lifting groove on one side of the extrusion table; the bottom of the air-extracting piston cylinder is fixedly connected to the bottom side of the inner part of the extrusion table lifting groove, and the top end of a sliding rod of the air-extracting piston cylinder is fixedly connected to the bottom of the bending table. During the use, because sheet metal component need buckle in advance to sheet metal component avris earlier at the in-process of blank pressing, then carry out the pressfitting to the position of buckling and make it form level and smooth blank pressing, but in the present sheet metal component manufacturing process, generally separate the required processing machinery of two steps, carry out segmentation multiple pressing to sheet metal component side and make the blank pressing shaping, such design is unfavorable for improving the machining efficiency of sheet metal component on the one hand, on the other hand is because the mode of multistage pressfitting, it is incomplete scheduling problem probably to cause sheet metal component surface indentation or pressfitting, and finally, such design is also unfavorable for reduce cost, cause unnecessary extravagant. In view of the problems, the sheet metal part is pre-bent by the bending blade at the top, so that the side edge of the sheet metal part needing edge pressing can be folded firstly, then the pre-bent sheet metal part is placed on the extrusion table for extrusion edge pressing, and the edge pressing action is formed at one time, so that the condition that the surface of the edge pressing is indented is avoided, meanwhile, the time required by edge pressing is shortened, the processing efficiency of the sheet metal part is increased, the edge pressing is formed at one time, the error probability of edge pressing is reduced, and the possibility of the problems of incomplete edge pressing and the like of the sheet metal part is greatly reduced.
Preferably, the bottom of the inverted L-shaped inner side of the bending table is provided with an installation groove; the outer wall of the mounting groove is provided with a threaded through hole, and the corresponding position of the inner wall of the mounting groove is provided with a threaded blind hole; the middle part of the extrusion block is provided with a threaded through hole, and the extrusion block is fixedly arranged in the mounting groove through a height-adjusting bolt and threaded holes on two side walls in the mounting groove; the position of the extrusion block corresponds to the position of the sliding groove at the top of the extrusion table; electric push rods are arranged at two ends of the sliding groove at the top of the extrusion table; the fixed blocks are respectively and correspondingly arranged at the inner sides of the electric push rods at the two ends and are under the thrust action of the electric push rods; the steel wire is connected in the fixing hole in the fixing block, two ends of the steel wire are connected in the fixing holes corresponding to two sides of the fixing block respectively, and the position of the steel wire corresponds to the position of the extrusion block at the bottom of the L-shaped inner side of the bending table. When the device is used, the sheet metal part is often subjected to edge pressing conditions with different requirements in different forms, such as arc-shaped edge pressing and other special-shaped edge pressing, so that after the sheet metal part is subjected to edge pressing, the sheet metal part is fixed at the top of an extrusion table, an electric push rod can push a fixing block to a designated position to assist in positioning the sheet metal part and carry out edge pressing on the sheet metal part, when the special-shaped edge pressing is required or the edge pressing position of the sheet metal part is blocked by a higher part, the extrusion blocks in different shapes can be replaced to extrude the sheet metal part, after the edge pressing is finished, patterns in different shapes can be left on the sheet metal part and are prevented from being pressed to other positions without edge pressing, the applicability of the device is increased, when the arc-shaped edge pressing is required, two ends of a steel wire can respectively penetrate through corresponding hole positions of the fixing blocks at two sides by virtue of the flexibility of the steel wire, so that the steel wire, according to different needs, steel wires with different thicknesses can be replaced, according to the thickness of a sheet metal part, the height of the steel wires can be adjusted through the design of the circular truncated cone-shaped aperture of the fixed block, the fixed block is pushed to a designated position by the electric push rod, the steel wires are pushed to the designated position of the side edge of the sheet metal part, the pre-bent side edge is supported, so that circular arcs with fixed shapes are formed after the side edge is pressed to finish circular arc edge pressing, after the edge pressing is finished, the steel wires are taken out, in addition, a user can limit the sheet metal part by replacing the shape of the fixed block to prevent the sheet metal part from displacing in the pressing process, so that the edge pressing action of the sheet metal part is smoothly carried out, the sheet metal parts with different shapes can be subjected to edge pressing by the instrument, the applicability of the instrument is further increased, the position of the electric push rod can be adjusted in the using process, the blank pressing processing of the sheet metal part of the small part can also be accurately carried out.
Preferably, the inner side of the bottom of the extrusion block is provided with a chamfer, and the outer side of the bottom of the extrusion block is provided with a fillet. During the use, the chamfer position can avoid fixed block and extrusion piece contact and influence the blank pressing, has avoided appearing blank pressing incomplete situation, and the design of fillet can avoid the sheet metal component surface indentation to appear owing to contact with the sheet metal component at first in the extrusion piece outside, improves the blank pressing quality.
Preferably, the upper surface of the extrusion table is provided with a rough layer, so that the friction force between the extrusion table and the sheet metal part is increased. During the use, when the sheet metal component was placed at the extrusion platform surface, because sheet metal component and extrusion platform surface friction are enough, the sheet metal component is difficult to remove, is favorable to the location of sheet metal component for the extrusion piece can be accurately extruded, and in extrusion process, sufficient friction can prevent that the sheet metal component from removing, and the spacing of cooperation fixed block guarantees that blank pressing technology normally goes on, and can improve the blank pressing quality, avoids appearing the blank pressing bad situation of relative slip.
Preferably, the top of the extrusion table is provided with an air suction hole, the air suction hole is communicated with the inside of an air suction piston cylinder at the bottom of the lifting groove of the extrusion table through an air hole inside the extrusion table and a vent pipe, and the middle part of the vent pipe at the side is provided with a one-way air valve which only allows air flow to the inside of the air suction piston cylinder; the other side of the air extraction piston cylinder communicates the internal air with the outside through a vent pipe, and a one-way air valve which only allows the air flow to flow outwards from the inside of the air extraction piston cylinder is arranged in the middle of the vent pipe on the side. When the device is used, when the bending table rises, the piston in the air-extracting piston cylinder is driven to rise, the air-extracting piston cylinder performs air extraction, the air flow is limited to enter from the middle part of the vent pipe on one side of the air-extracting piston cylinder, the air flow can only enter into the extrusion table from the air suction hole on the top of the extrusion table and enters into the air-extracting piston cylinder through the vent pipe, the air flow can bring metal scraps on the surface of the extrusion table into the air-extracting piston cylinder for storage in the process, the surface of the extrusion table is cleaned, the metal scraps are prevented from scratching the surface of a sheet metal part, in addition, the suction effect can be realized on the sheet metal part in the air suction process, the friction force between the sheet metal part and the extrusion table is increased, the sheet metal part is more difficult to slide, when the bending table rises, the air flow in the air-extracting piston cylinder can gush out, because the air, affecting the processing of the sheet metal part.
Preferably, at least two threaded through holes are formed in the outer wall of the mounting groove and are all located on the same horizontal line; the middle part of the extrusion block is provided with at least two layers of thread through holes with different heights, each layer of thread through hole is positioned on the same horizontal line, and the number, the size and the position of the thread through holes are corresponding to those of the outer wall of the mounting groove. During the use, because the extrusion bench top is provided with parts such as electric putter and fixed block, and the height and the degree of depth of sheet metal component blank pressing position are all inequality, need be according to the demand of the sheet metal component of treating the pressfitting at the pressfitting in-process, the height of adjustment extrusion piece, make the extrusion piece when not touchhing non-pressfitting faces such as below electric putter and fixed block and sheet metal surface other spare parts, can be accurate carry out the blank pressing to the sheet metal component, consequently before the sheet metal component blank pressing, can adjust the installation depth of extrusion piece, avoid the easy non-pressfitting face that is touched.
The invention has the following beneficial effects:
1. according to the sheet metal part processing technology, the electric push rod is arranged, the position of the electric push rod can be adjusted in the using process, the blank pressing range is enlarged or reduced, the blank pressing of a large sheet metal part can be completed, meanwhile, the blank pressing of a small sheet metal part can be accurately performed, the extrusion process is formed in one step, the working efficiency is greatly improved, and the generation of defective blank pressing products is reduced.
2. According to the sheet metal part machining process, the air exhaust piston cylinder is arranged to bring the metal scraps on the surface of the extrusion table into the air exhaust piston cylinder for storage, the surface of the extrusion table is cleaned, the metal scraps are prevented from scratching the surface of the sheet metal part, the sheet metal part is sucked in the air suction process, the friction force between the sheet metal part and the extrusion table is increased, the sheet metal part is enabled to be less prone to sliding, when the bending table rises, air flow in the air exhaust piston cylinder can gush out, and the air flow can only flow out from the other side due to the fact that the air inlet is provided with the one-way air valve, and the phenomenon that the air flow blows the sheet metal part on the surface of the extrusion table to affect machining of the.
3. According to the sheet metal part processing technology, the chamfer angle on the inner side of the bottom of the extrusion block is arranged, so that the surface of the sheet metal part can be prevented from being in contact with the right-angle extrusion block to form an indentation or even a fracture layer, and the outer side of the extrusion block is firstly in contact with the sheet metal part, so that the design of the fillet on the outer side of the bottom of the extrusion block can prevent the surface of the sheet metal part from being indented, and the blank pressing quality is improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a front view of the present invention using a binder apparatus;
FIG. 3 is an assembled cross-sectional view of the extrusion block of the present invention;
FIG. 4 is an assembled cross-sectional view of the steel wire of the present invention;
FIG. 5 is an assembled cross-sectional view of the extraction piston cylinder of the present invention;
FIG. 6 is a cross-sectional view of the extraction piston cylinder of the present invention;
in the figure: the device comprises a bending blade 1, a bending table 2, a V-shaped groove 3, a mounting groove 4, an extrusion block 5, a height-adjusting bolt 6, an extrusion table 7, a sliding groove 8, an electric push rod 9, a steel wire 10, a fixing block 11, an air-extracting piston cylinder 12 and a one-way air valve 13.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 6, the sheet metal part processing technology of the present invention includes the following steps:
s1: the sheet metal part is subjected to preliminary cutting and flattening, so that the side edge needing to be subjected to edge pressing is not blocked and is kept flat, and the influence on the quality of the final sheet metal part edge pressing caused by the blocking of other parts during edge pressing is avoided;
s2: measuring a sheet metal part, placing the sheet metal part on a bending table of a blank pressing instrument, positioning the sheet metal part through an auxiliary positioning jig on the instrument, starting the blank pressing instrument to pre-bend the sheet metal part after the sheet metal part is fixed, and bending the side edge of the sheet metal part needing blank pressing into an acute angle;
s3: taking out the bent sheet metal part, placing the sheet metal part on an extrusion table of a blank pressing instrument, fixing the sheet metal part by using an auxiliary fixing jig on the instrument, and starting the blank pressing instrument to extrude the bent side edge of the sheet metal part to enable the side edge to form a blank pressing;
s4: after the edge pressing is finished, taking out the sheet metal part, carrying out visual evaluation and accurate measurement on the sheet metal part, confirming the yield of the edge pressing, and carrying out grinding, re-extrusion or registration scrapping treatment on the defective parts such as burrs or indentations formed by the edge pressing;
the blank pressing instrument used in S2 and S3 comprises a bending blade 1, a bending table 2, a V-shaped groove 3, a squeezing block 5, a squeezing table 7, a sliding groove 8 and an air-extracting piston cylinder 12; the bending blade 1 is arranged at the bottom of the hydraulic cylinder; the upper surface of the bending table 2 is provided with a V-shaped groove 3, and the position of the V-shaped groove 3 corresponds to the position of the bending blade 1; the bending table 2 is of an inverted L-shaped structure, the extending part of the upper end of the bending table 2 corresponds to one end of the top of the extrusion table 7, and the top of the extrusion table 7 is provided with a sliding groove 8 at the corresponding position; the other end of the top of the extrusion table 7 is provided with a lifting groove; the bottom of the bending table 2 is fixedly connected to the top of the hydraulic cylinder, and the bottom of the hydraulic cylinder is fixed to the bottom side of the inner part of the lifting groove on one side of the extrusion table 7; the bottom of the air-extracting piston cylinder 12 is fixedly connected to the bottom side of the inner part of the lifting groove of the extrusion table 7, and the top end of a sliding rod of the air-extracting piston cylinder 12 is fixedly connected to the bottom of the bending table 2. During the use, because sheet metal component need buckle in advance to sheet metal component avris earlier at the in-process of blank pressing, then carry out the pressfitting to the position of buckling and make it form level and smooth blank pressing, but in the present sheet metal component manufacturing process, generally separate the required processing machinery of two steps, carry out segmentation multiple pressing to sheet metal component side and make the blank pressing shaping, such design is unfavorable for improving the machining efficiency of sheet metal component on the one hand, on the other hand is because the mode of multistage pressfitting, it is incomplete scheduling problem probably to cause sheet metal component surface indentation or pressfitting, and finally, such design is also unfavorable for reduce cost, cause unnecessary extravagant. In view of the problems, the sheet metal part is pre-bent and pressed on the same processing machine, the sheet metal part is pre-bent by the bending blade 1 at the top, so that the side edge of the sheet metal part needing pressing can be folded firstly, then the pre-bent sheet metal part is placed on the extrusion table 7 for extrusion pressing, and the pressing action is formed at one time, so that the condition that the pressing edge surface has indentations is avoided, the time required by pressing the edges is shortened, the processing efficiency of the sheet metal part is increased, the sheet metal part is formed at one time, the error probability of pressing the edges is reduced, and the possibility of the problems of incomplete pressing and the like of the pressing edges of the sheet metal part is greatly reduced.
As an embodiment of the invention, the bottom of the inverted L-shaped inner side of the bending table 2 is provided with an installation groove 4; the outer wall of the mounting groove 4 is provided with a threaded through hole, and the corresponding position of the inner wall of the mounting groove 4 is provided with a threaded blind hole; the middle part of the extrusion block 5 is provided with a threaded through hole, and the extrusion block 5 is fixedly arranged in the mounting groove 4 through a height-adjusting bolt 6 and threaded holes on two side walls in the mounting groove 4; at least two layers of threaded holes are arranged in the extrusion block 5, and at least two threaded holes are arranged in each layer of the same horizontal line; the position of the extrusion block 5 corresponds to the position of a sliding groove 8 at the top of the extrusion table 7; electric push rods 9 are arranged at two ends of a sliding groove 8 at the top of the extrusion table 7; the fixed blocks 11 are respectively and correspondingly arranged at the inner sides of the electric push rods 9 at the two ends, and the fixed blocks 11 are subjected to the thrust action of the electric push rods 9; the steel wire 10 is connected in the fixing hole in the fixing block 11, two ends of the steel wire 10 are respectively connected in the fixing holes corresponding to two sides of the fixing block 11, and the position of the steel wire 10 corresponds to the position of the extrusion block 5 at the bottom of the L-shaped inner side of the bending table 2. When the device is used, the sheet metal part is often subjected to edge pressing conditions with different requirements in different forms, such as arc-shaped edge pressing and other special-shaped edge pressing, so that after the sheet metal part is subjected to edge pressing, the sheet metal part is fixed at the top of the extrusion table 7, the fixing blocks 11 can be pushed to the designated positions by the electric push rods 9, the positioning of the sheet metal part is assisted, the edge pressing is performed on the sheet metal part, when the edge pressing with the special shape is required or the edge pressing position of the sheet metal part is blocked by a higher part, the extrusion blocks 5 with different shapes can be replaced, the sheet metal part is extruded, after the edge pressing is completed, patterns with different shapes can be left on the sheet metal part, the pressing to other positions without edge pressing is avoided, the applicability of the device is increased, when the arc-shaped edge pressing is required, the two ends of the steel wire 10 can respectively penetrate through the corresponding edge pressing positions of the fixing blocks 11 on the two, the steel wire 10 is fixed between the fixing blocks 11 on the two sides, the steel wire 10 with different thicknesses is replaced according to different requirements, the height of the steel wire can be adjusted through the design of the circular truncated cone-shaped aperture of the fixing block according to the thickness of the sheet metal part, the fixing block 11 is pushed to a designated position by the electric push rod 9, the steel wire 10 is pushed to the designated position of the side edge of the sheet metal part, the pre-bent side edge is supported, an arc with a fixed shape is formed after the side edge is pressed to complete the arc-shaped edge pressing, after the edge pressing is completed, the steel wire 10 is pulled out, in addition, a user can limit the sheet metal part by replacing the shape of the fixing block 11, the sheet metal part displacement in the pressing process is prevented, the edge pressing action of the sheet metal part is smoothly carried out, the sheet metal parts with different shapes can be pressed by the instrument, the applicability of the instrument, the blank pressing range is enlarged or reduced, so that the blank pressing of the small sheet metal part can be accurately carried out while the blank pressing of the large sheet metal part can be finished.
In one embodiment of the present invention, the inner side of the bottom of the extrusion block 5 is provided with a chamfer, and the outer side of the bottom of the extrusion block 5 is provided with a fillet. During the use, the chamfer position can avoid fixed block 11 and 5 contacts of extrusion piece and influence the blank pressing, has avoided appearing blank pressing incomplete situation, and the indentation can be avoided appearing on the sheet metal component surface in the extrusion piece 5 outside owing to contact with the sheet metal component at first, the design of fillet, improves the blank pressing quality.
In one embodiment of the present invention, the upper surface of the pressing table 7 is provided with a rough layer to increase the friction between the pressing table 7 and the sheet metal part. During the use, when the sheet metal component was placed on extrusion platform 7 surface, because sheet metal component and 7 surperficial frictional forces of extrusion platform are enough, the sheet metal component is difficult to remove, be favorable to the location of sheet metal component, make extrusion piece 5 can accurately extrude, and at the extrusion in-process, sufficient frictional force can prevent that the sheet metal component from removing, cooperation fixed block 11 is spacing, guarantee blank pressing technology and normally go on, and can improve the blank pressing quality, avoid appearing the blank pressing bad situation of relative slip.
As an embodiment of the invention, the top of the extrusion table 7 is provided with an air suction hole, the air suction hole is communicated to the inside of an air extraction piston cylinder 12 at the bottom of a lifting groove of the extrusion table 7 through an air hole and a vent pipe inside the extrusion table 7, and a one-way air valve 13 which only allows air to flow to the inside of the air extraction piston cylinder 12 is installed in the middle of the vent pipe at the side; the other side of the air-extracting piston cylinder 12 communicates the internal air with the outside through a vent pipe, and a one-way air valve 13 which only allows the air flow to flow outwards from the inside of the air-extracting piston cylinder 12 is arranged in the middle of the vent pipe on the side. When the device is used, when the bending table 2 rises, the piston in the air suction piston cylinder 12 can be driven to rise, the air suction piston cylinder 12 performs air suction, the air flow can only enter the extrusion table 7 from the air suction hole at the top of the extrusion table 7 and enter the air suction piston cylinder 12 through the air vent pipe as the middle part of the air vent pipe at one side of the air suction piston cylinder 12 limits the air flow to enter, in the process, the air flow can bring metal scraps on the surface of the extrusion table 7 into the air suction piston cylinder 12 for storage, the surface of the extrusion table 7 is cleaned, the metal scraps are prevented from scratching the surface of a sheet metal part, in addition, the suction effect can be realized on the sheet metal part in the air suction process, the friction force between the sheet metal part and the extrusion table 7 is increased, the sheet metal part is enabled to be less prone to slide, when the bending table 2 rises, the air flow in the air suction piston cylinder 12 can, the sheet metal part on the surface of the extrusion table is prevented from being blown by air flow, and the processing of the sheet metal part is prevented from being influenced.
As an embodiment of the present invention, at least two threaded through holes are formed in the outer wall of the mounting groove 4, and are all located on the same horizontal line; the middle part of the extrusion block 5 is provided with at least two layers of thread through holes with different heights, each layer of thread through hole is positioned on the same horizontal line, and the number, the size and the position of the thread through holes are corresponding to those of the outer wall of the mounting groove 4. During the use, because extrusion platform 7 top is provided with parts such as electric putter 9 and fixed block 11, and the height and the degree of depth of sheet metal component blank pressing position are all inequality, need be according to the demand of the sheet metal component of treating the pressfitting at the pressfitting in-process, adjust the height of extrusion piece 5, make extrusion piece 5 when not touchhing non-pressfitting faces such as below electric putter 9 and fixed block 11 and other spare parts on sheet metal surface, can be accurate carry out the blank pressing to the sheet metal component, consequently before the sheet metal component blank pressing, can adjust the installation depth of extrusion piece 5, avoid the non-pressfitting face that is touched easily.
During the use, because sheet metal component need buckle in advance to sheet metal component avris earlier at the in-process of blank pressing, then carry out the pressfitting to the position of buckling and make it form level and smooth blank pressing, but in the present sheet metal component manufacturing process, generally separate the required processing machinery of two steps, carry out segmentation multiple pressing to sheet metal component side and make the blank pressing shaping, such design is unfavorable for improving the machining efficiency of sheet metal component on the one hand, on the other hand is because the mode of multistage pressfitting, it is incomplete scheduling problem probably to cause sheet metal component surface indentation or pressfitting, and finally, such design is also unfavorable for reduce cost, cause unnecessary extravagant. In view of the problems, the sheet metal part is pre-bent and pressed on the same processing machine, the sheet metal part is pre-bent by the bending blade 1 at the top, so that the side edge of the sheet metal part needing pressing can be folded firstly, then the pre-bent sheet metal part is placed on the extrusion table 7 for extrusion pressing, and the pressing action is formed at one time, so that the condition that the pressing edge surface has indentations is avoided, the time required by pressing the edges is shortened, the processing efficiency of the sheet metal part is increased, the sheet metal part is formed at one time, the error probability of pressing the edges is reduced, and the possibility of the problems of incomplete pressing and the like of the pressing edges of the sheet metal part is greatly reduced.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A sheet metal part machining process is characterized by comprising the following steps:
s1: the sheet metal part is subjected to preliminary cutting and flattening, so that the side edge needing to be subjected to edge pressing is not blocked and is kept flat, and the influence on the quality of the final sheet metal part edge pressing caused by the blocking of other parts during edge pressing is avoided;
s2: measuring a sheet metal part, placing the sheet metal part on a bending table of a blank pressing instrument, positioning the sheet metal part through an auxiliary positioning jig on the instrument, starting the blank pressing instrument to pre-bend the sheet metal part after the sheet metal part is fixed, and bending the side edge of the sheet metal part needing blank pressing into an acute angle;
s3: taking out the bent sheet metal part, placing the sheet metal part on an extrusion table of a blank pressing instrument, fixing the sheet metal part by using an auxiliary fixing jig on the instrument, and starting the blank pressing instrument to extrude the bent side edge of the sheet metal part to enable the side edge to form a blank pressing;
s4: after the edge pressing is finished, taking out the sheet metal part, carrying out visual evaluation and accurate measurement on the sheet metal part, confirming the yield of the edge pressing, and carrying out grinding, re-extrusion or registration scrapping treatment on the defective parts such as burrs or indentations formed by the edge pressing;
the blank pressing instrument used in S2 and S3 comprises a bending blade (1), a bending table (2), a V-shaped groove (3), a pressing block (5), a pressing table (7), a sliding groove (8) and an air-extracting piston cylinder (12); the bending blade (1) is arranged at the bottom of the hydraulic cylinder; the upper surface of the bending table (2) is provided with a V-shaped groove (3), and the position of the V-shaped groove (3) corresponds to the position of the bending blade (1); the bending table (2) is of an inverted L-shaped structure, the part extending out of the upper end of the bending table (2) corresponds to one end of the top of the extrusion table (7), and the top of the extrusion table (7) is provided with a sliding groove (8) at the corresponding position; the other end of the top of the extrusion table (7) is provided with a lifting groove; the bottom of the bending table (2) is fixedly connected to the top of the hydraulic cylinder, and the bottom of the hydraulic cylinder is fixed to the bottom side of the inner part of the lifting groove on one side of the extrusion table (7); the bottom of the air-extracting piston cylinder (12) is fixedly connected to the bottom side of the inner part of the lifting groove of the extrusion table (7), and the top end of a sliding rod of the air-extracting piston cylinder (12) is fixedly connected to the bottom of the bending table (2);
the bottom of the inverted L-shaped inner side of the bending table (2) is provided with a mounting groove (4); the bottom end of the outer wall of the mounting groove (4) is provided with a threaded through hole, and the corresponding position of the inner wall of the mounting groove (4) is provided with a threaded blind hole; the middle part of the extrusion block (5) is provided with a threaded through hole, and the extrusion block (5) is fixedly arranged in the mounting groove (4) through a height-adjusting bolt (6) and threaded holes on two side walls in the mounting groove (4); the position of the extrusion block (5) corresponds to the position of a sliding groove (8) at the top of the extrusion table (7); electric push rods (9) are arranged at two ends of a sliding groove (8) at the top of the extrusion table (7); the fixed blocks (11) are respectively and correspondingly arranged at the inner sides of the electric push rods (9) at the two ends, and the fixed blocks (11) are subjected to the thrust action of the electric push rods (9); the steel wire (10) is connected in the fixing hole in the fixing block (11), two ends of the steel wire (10) are connected in the fixing holes corresponding to two sides of the fixing block (11), and the position of the steel wire (10) corresponds to the position of the extrusion block (5) at the bottom of the L-shaped inner side of the bending table (2).
2. The sheet metal part machining process according to claim 1, characterized in that: the inner side of the bottom of the extrusion block (5) is provided with a chamfer, and the outer side of the bottom of the extrusion block (5) is provided with a fillet.
3. The sheet metal part machining process according to claim 2, characterized in that: the upper surface of the extrusion table (7) is provided with a rough layer, so that the friction force between the extrusion table (7) and the sheet metal part is increased.
4. The sheet metal part machining process according to claim 3, characterized in that: the top of the extrusion table (7) is provided with an air suction hole which is communicated with the inside of an air suction piston cylinder (12) at the bottom of a lifting groove of the extrusion table (7) through an air hole and a vent pipe inside the extrusion table (7), and the middle part of the vent pipe at the side is provided with a one-way air valve (13) which only allows air to flow to the inside of the air suction piston cylinder (12); the other side of the air-extracting piston cylinder (12) communicates the internal air with the outside through a vent pipe, and a one-way air valve (13) which only allows the air flow to flow outwards from the inside of the air-extracting piston cylinder (12) is arranged in the middle of the vent pipe on the side.
5. The sheet metal part machining process according to claim 1, characterized in that: at least two threaded through holes are formed in the outer wall of the mounting groove (4), and are all located on the same horizontal line; the middle part of the extrusion block (5) is provided with at least two layers of thread through holes with different heights, each layer of thread through hole is positioned on the same horizontal line, and the number, the size and the position of the thread through holes correspond to those of the outer wall of the mounting groove (4).
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| CN201910801251.2A CN110369974B (en) | 2019-08-28 | 2019-08-28 | Sheet metal part machining process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0924421A (en) * | 1995-07-13 | 1997-01-28 | Susumu Kawano | Lower die for press blake and its holder |
| CN201088992Y (en) * | 2007-06-28 | 2008-07-23 | 杭宜银 | Double-bending combination die |
| CN101554638A (en) * | 2008-04-09 | 2009-10-14 | 鸿富锦精密工业（深圳）有限公司 | Bending die |
| CN101559455B (en) * | 2008-04-18 | 2012-03-28 | 鸿富锦精密工业（深圳）有限公司 | Coiling mould |
| CN201231284Y (en) * | 2008-08-05 | 2009-05-06 | 张迎年 | Ultra-long integration double-fold die |
| CN204892625U (en) * | 2015-09-02 | 2015-12-23 | 马鞍山市国菱机械刃模有限公司 | Pneumatics mould of bending that flattens |
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Effective date of registration: 20210425 Address after: 264200 old steel window factory yard, Yangting village, Yangting Town, Huancui District, Weihai City, Shandong Province Applicant after: Weihai Huaxing Electrical Equipment Co.,Ltd. Address before: No. 56, Nancun, Daying Town, Longqiao District, Suzhou City, Anhui Province, 234000 Applicant before: Zhou Peng |
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