CN107008806B - A kind of continuous compound fine-punching formation technique of tooth form metallic gasket walk - Google Patents

Abstract

The invention relates to a step-by-step continuous composite fine-blanking forming process for a tooth-shaped metal gasket. The sheet material is placed on a step-by-step continuous composite fine-blanking forming device, and the sheet material is placed in four stations of the step-by-step continuous composite fine-blanking forming device. In order to finish punching the inner hole and forming the annular incision, pre-extruding the tooth shape, fine-extruding the tooth shape, punching the inner hole and blanking, it becomes a tooth-shaped metal gasket, and the manipulator takes the tooth-shaped metal gasket out of the composite fine-blanking forming device Put it on the extrusion die of the deburring extrusion die device, the extrusion punch of the deburring extrusion die device moves down and cooperates with the extrusion die to squeeze the tooth-shaped metal gasket and squeeze the groove of the die The bottom edge is rounded, and when the tooth-shaped metal gasket is squeezed, the burrs on the edge of the tooth-shaped metal gasket are folded inward through the rounded corners and are squeezed into the surface of the tooth-shaped metal gasket. The process has high processing precision, effectively removes burrs, and has high processing efficiency.

Description

A step-by-step continuous composite fine-blanking forming process for tooth-shaped metal gaskets

technical field

The invention belongs to the field of composite fine-blanking forming, and in particular relates to a step-by-step continuous composite fine-blanking forming process of a tooth-shaped metal sealing gasket.

Background technique

Fine blanking makes parts with high dimensional accuracy and good cross-section quality through unique mold structure design, and is widely used in the fields of automobiles, mechanical electronics, and aerospace, while compound fine blanking refers to the use of continuous composite dies or multiple dies on the fine blanking machine. Station progressive die is a processing that combines the contour fine blanking of parts with other forming processes (such as bending, flanging, flattening, upsetting, extrusion, countersinking and other volume forming processes) at one or different stations. Method, the general steps of composite forming process are to obtain the shape characteristics of parts through volume forming, and then obtain parts with high dimensional accuracy and good surface quality through fine blanking.

The shear surface of composite fine blanking parts contains burrs. The existence of burrs will seriously affect the assembly of parts, and the peeling of burrs in the subsequent use process will affect the performance of the entire part. Therefore, composite fine blanking parts need to be deburred. In use, the existing deburring process is generally to place the parts on the conveyor belt and then remove the burrs by a high-speed rotating brush.

The thickness of the tooth-shaped gasket is generally less than 2mm, and the outer diameter is large (up to 240mm), and in order to ensure the sealing performance of the tooth-shaped metal gasket, the flatness requirements are high, so the tooth-shaped metal gasket has a large outer diameter and a thin thickness. The traditional deburring process will seriously affect the flatness of the parts. How to ensure the flatness of tooth-shaped metal gaskets, simplify the production process of tooth-shaped metal gaskets, and improve production efficiency is a major problem that still needs to be solved in the compound fine blanking production of tooth-shaped metal gaskets.

Contents of the invention

The purpose of the present invention is to provide a step-by-step continuous composite fine-blanking forming process for tooth-shaped metal gaskets. Stretch the burr, effectively remove the burr, and the processing efficiency is high.

The technical scheme adopted in the present invention is:

A step-by-step continuous composite fine-blanking forming process for tooth-shaped metal gaskets, comprising the following steps,

1) Place the sheet on the step-by-step continuous compound fine blanking forming device, and the sheet material is sequentially completed in the four stations of the step-by-step continuous compound fine blanking forming device for punching the inner hole and annular incision forming, pre-extruding tooth shape, fine After extruding the tooth shape, punching the inner hole and blanking, it becomes a tooth-shaped metal gasket;

2) The manipulator takes the tooth-shaped metal gasket out of the compound fine blanking forming device and puts it on the extrusion die of the deburring extrusion die device;

3) The extrusion punch of the deburring extrusion die device moves down and cooperates with the extrusion die to squeeze the tooth-shaped metal gasket. The bottom edge of the groove of the extrusion die is rounded, and the tooth-shaped metal gasket is squeezed When pressing, the burrs at the edge of the toothed metal gasket are folded inward through the fillet guide and pressed into the surface of the toothed metal gasket.

Further, when the tooth shape of the tooth-shaped metal gasket is an equilateral right-angled triangle, the extruded tooth tip angle of the pre-extruded tooth shape is 55°, and the extruded tooth tip angle of the fine-extruded tooth shape is 90°.

Further, the step-by-step continuous compound fine-blanking forming device includes a first upper template, a first lower template located directly below the first upper template, a first upper mold backing plate fixed on the bottom side of the first upper template, and sequentially along the processing direction Set punching inner hole and annular notch forming components, pre-extrusion tooth profile components, fine extrusion tooth profile components, punching inner holes and blanking components;

The punching inner hole and annular slit forming assembly includes a first pressing plate located below the first upper die backing plate, a first force transmission force passing through the first upper die and the first upper die backing plate and fixedly connected to the first pressing plate The rod and its upper end are all fixed on the bottom side of the first upper formwork and the lower ends pass through the first upper form backing plate and the first blanking punch and the first inner hole punch of the first binder plate, and are all fixed on the first lower formwork top side and The notching die and the first punching inner hole die located directly below the notching punch and the first punching inner hole punch respectively;

The pre-extrusion tooth-shaped assembly includes a second pressure plate located under the first upper die backing plate, a second dowel rod fixedly connected to the second pressure plate through the first upper die plate and the first upper die backing plate, and an upper end The pre-extrusion tooth punch fixed on the bottom side of the first upper template and whose lower end passes through the first upper die backing plate and the second pressing plate, the pre-extrusion tooth punch fixed on the top side of the first lower template and located directly below the pre-extrusion tooth punch Tooth extrusion die;

The fine-extrusion gear assembly includes a third pressing plate located below the first upper die backing plate, a third dowel rod fixedly connected to the third pressing plate through the first upper die backing plate and the first upper die backing plate, and an upper end The fine-extrusion tooth punch fixed on the bottom side of the first upper template and whose lower end passes through the first upper die backing plate and the third pressing plate, the fine-extrusion tooth punch fixed on the top side of the first lower template and located directly below the fine-extrusion tooth punch Tooth extrusion die;

The punching inner hole and the blanking assembly are located on the fourth pressing plate under the first upper die backing plate, the fourth dowel rod fixedly connected to the fourth pressing plate through the first upper die backing plate and the first upper die backing plate, The upper ends are fixed on the bottom side of the first upper template and the lower ends pass through the blanking punch of the first upper mold backing plate and the fourth blanking plate and the second inner hole punch, are fixed on the top side of the first lower template and respectively The blanking die and the second punching inner hole die located directly below the blanking punch and the second punching inner hole punch.

Further, the deburring extrusion die device includes a second upper template, a second lower template positioned directly below the second upper template, a second upper mold backing plate fixed on the bottom side of the second upper template, and an upper end fixed on the second upper template. The bottom side of the template and the lower end pass through the extrusion punch of the second upper mold backing plate, and the extrusion die that is fixed on the top side of the second lower template and is located directly below the extrusion punch.

The beneficial effects of the present invention are:

The tooth shape of the tooth-shaped metal gasket is formed by two extrusions of pre-extrusion and fine extrusion. During pre-extrusion, a tooth shape with a small tooth tip angle is formed. During fine extrusion, the tooth tip angle is enlarged and lowered. Compared with one-time extrusion, Reduce stress concentration, avoid excessive metal deformation, and improve processing accuracy. The tooth-shaped metal gasket adopts two punching inner holes, and the two punching inner holes are respectively located at the front and rear stations of the extrusion tooth shape. The second punching The inner hole and the blanking are carried out at the same time, which is used to remove the part of the inner hole that is compressed and narrowed after the extrusion tooth shape, so as to ensure the processing accuracy. The tooth-shaped metal gasket is deburred through extrusion, and the rounded corner design of the extrusion die The burrs on the edge of the tooth-shaped metal gasket are guided to fold inward until they are embedded in the surface of the tooth-shaped metal gasket. Compared with the design without rounded corners, the burrs can be flattened and not gathered together. This process has high processing efficiency and effectively removes burrs , To ensure the flatness of the toothed metal gasket.

Description of drawings

Fig. 1 is a schematic structural view of a moving continuous compound fine blanking forming device in an embodiment of the present invention.

Fig. 2 is a schematic diagram of the pre-extruded tooth profile in the embodiment of the present invention.

Fig. 3 is a schematic diagram of the tooth shape after fine extrusion in the embodiment of the present invention.

Fig. 4 is a schematic diagram of the tooth-shaped metal gasket in the embodiment of the present invention when it is in the deburring extrusion die device and is not processed.

Fig. 5 is a schematic diagram of the tooth-shaped metal gasket in the embodiment of the present invention when it is processed in the deburring extrusion die device.

Fig. 6 is a process flow diagram of an embodiment of the present invention.

Fig. 7 is a schematic diagram of a toothed metal gasket in an embodiment of the present invention.

In the figure: 1-sheet material; 2-first dowel bar; 3-notch punch; 4-first punching inner hole punch; 5-first pressing plate; 6-second dowel bar; 7-pre-extrusion Tooth punch; 8-Second dowel; 9-Third dowel; 10-Extrusion tooth punch; 11-Third pressure plate; 12-Fourth dowel; 13-Blanking punch ;14-the second inner hole punch; 15-the first upper template; 16-the first upper mold backing plate; 17-the fourth pressing plate; Second punch inner hole die; 21- fine extrusion tooth die; 22- pre-extrusion tooth die; 23- incision die; 24- first punch inner hole die; 25- second upper template; 26- extrusion Punch; 27-Second Upper Die Backing Plate; 28-Extrusion Die; 29-Second Lower Template; 30-Tooth Metal Seal; 31-Burr; 32-Manipulator.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

A step-by-step continuous compound fine-blanking forming process for tooth-shaped metal gaskets, as shown in Figure 6, includes the following steps: 1) Place the sheet material 1 on the step-by-step continuous compound fine-blanking forming device, and the sheet material 1 is placed on the step-by-step continuous compound fine-blanking forming device. In the four stations of the continuous compound fine blanking forming device, the punching inner hole and annular incision forming, pre-extrusion tooth shape, fine extrusion tooth shape, inner hole punching and blanking are completed in sequence to form a tooth-shaped metal gasket 30; 2) Manipulator 32 Take out the tooth-shaped metal gasket 30 from the composite fine blanking forming device and put it on the extrusion die 28 of the deburring extrusion die device; 3) The extrusion punch 26 of the deburring extrusion die device moves down and squeezes The pressing die 28 cooperates to extrude the tooth-shaped metal gasket 30, and the bottom edge of the groove of the extrusion die 28 is rounded (as shown in Figure 4 and Figure 5), and when the tooth-shaped metal gasket 30 is extruded, The burrs 31 at the edge of the tooth-shaped metal gasket 30 (the burrs 31 are concentrated at the edge of the tooth-shaped metal gasket 30 ) are folded inward through the rounded corner guide and pressed into the surface of the tooth-shaped metal gasket 30 (as shown in Figure 5 ).

The tooth shape of the tooth-shaped metal gasket 30 is formed by two extrusions of pre-extrusion and fine extrusion. During pre-extrusion, a tooth shape with a small tooth tip angle is formed. During fine extrusion, the tooth tip angle is enlarged and lowered. , reducing stress concentration, avoiding excessive metal deformation, and improving processing accuracy. The tooth-shaped metal gasket 30 uses two punching inner holes, and the two punching inner holes are respectively located at the front and rear stations of the extrusion tooth shape. The second The secondary punching inner hole and blanking are carried out at the same time, which is used to remove the part of the inner hole that is compressed and narrowed after the tooth shape is extruded, so as to ensure the processing accuracy. The rounded corner design makes the burrs 31 at the edge of the toothed metal gasket 30 be guided inwards and folded until embedded in the surface of the toothed metal gasket 30. Compared with the design without rounded corners, the burrs 31 can be flattened and not gathered together. This process The processing efficiency is high, the burr 31 is effectively removed, and the flatness of the tooth-shaped metal sealing gasket 30 is guaranteed.

As shown in Fig. 2, Fig. 3 and Fig. 7, in this embodiment, the tooth shape of the tooth-shaped metal gasket 30 is an equilateral right-angled triangle, the extruded tooth tip angle of the pre-extruded tooth shape is 55°, and the tooth shape of the fine-extruded tooth is 55°. The tooth tip angle extruded by the shape is 90° (in fact, the tooth shape of the tooth-shaped metal sealing gasket 30 is not limited to an equilateral right-angled triangle, but can also be other tooth shapes such as an equilateral acute-angled triangle, which is only an embodiment here).

As shown in Figure 1, in this embodiment, the step-by-step continuous compound fine blanking forming device includes a first upper template 15, a first lower template 19 located directly below the first upper template 15, and a first lower template 19 fixed on the bottom of the first upper template 15. The first upper die backing plate 16 on the side and the punching inner hole and annular notch forming assembly, the pre-extrusion tooth-shaped assembly, the fine-extrusion tooth-shaped assembly, the punching inner hole and the blanking assembly are arranged in sequence along the processing direction. The punching inner hole and annular notch forming assembly includes a first pressing plate 5 located below the first upper die backing plate 16, and is fixedly connected to the first pressing plate 5 through the first upper die backing plate 15 and the first upper die backing plate 16 The upper end of the first dowel bar 2 is fixed on the bottom side of the first upper mold plate 15 and the lower end passes through the first upper mold backing plate 16 and the first blanking punch 3 of the first binder plate 5 and the first punching inner hole punch 4 , are fixed on the top side of the first lower template 19 and are respectively positioned at the notch die 23 and the first punch inner hole die 24 directly below the notch punch 3 and the first punch inner hole punch 4; during work, the first dowel 2 Drive the first clamping plate 5 to press the sheet material 1, the incision punch 3 and the first punch inner hole punch 4 move down and cooperate with the notch die 23 and the first punch inner hole die 24 respectively to complete the annular incision forming and Punch the inner hole. The pre-extruded tooth-shaped assembly includes a second binder plate 8 positioned below the first upper die backing plate 16, a second second binder plate 8 that passes through the first upper die backing plate 15 and the first upper die backing plate 16 and is fixedly connected to the second binder plate 8. The upper end of the dowel bar 6 is fixed on the bottom side of the first upper template 15 and the lower end passes through the pre-extrusion tooth punch 7 of the first upper mold backing plate 16 and the second binder plate 8, and is fixed on the top side of the first lower template 19 And the pre-extrusion tooth die 22 located directly below the pre-extrusion tooth punch 7; during work, the second dowel 6 drives the second pressure plate 8 to compress the sheet material 1, and the pre-extrusion tooth punch 7 moves down and is connected with The pre-extrusion tooth die 22 cooperates to complete the pre-extrusion tooth shape. The fine-extruded tooth-shaped assembly includes a third clamping plate 11 positioned below the first upper die backing plate 16, a third clamping plate 11 that passes through the first upper die backing plate 15 and the first upper die backing plate 16 and is fixedly connected to the third clamping plate 11. The upper end of the dowel bar 9 is fixed on the bottom side of the first upper template 15 and the lower end passes through the fine extrusion tooth punch 10 of the first upper mold backing plate 16 and the third binder plate 11, and is fixed on the top side of the first lower template 19 And be positioned at the fine-extruded tooth die 21 directly below the fine-extruded tooth punch 10; During work, the third dowel 9 drives the third pressing plate 11 to compress the sheet material 1, and the fine-extruded tooth punch 10 moves down and is connected with Fine extrusion tooth die 21 cooperates to finish fine extrusion tooth shape. The punching inner hole and the blanking assembly are located at the fourth pressing plate 17 below the first upper die backing plate 16, and the fourth pressing plate 17 that passes through the first upper die backing plate 15 and the first upper die backing plate 16 is fixedly connected with the fourth pressing plate 17. Four dowel bars 12, the upper ends are all fixed on the bottom side of the first upper mold plate 15 and the lower ends pass through the blanking punch 13 of the first upper mold backing plate 16 and the fourth binder plate 17 and the second punching inner hole punch 14, Both are fixed on the top side of the first lower template 19 and are respectively located at the blanking die 18 and the second punching inner die 20 directly below the blanking punch 13 and the second punching inner punch 14 . When working, the fourth dowel 12 drives the fourth pressing plate 17 to press the sheet material 1, and the blanking punch 13 and the second punching inner hole punch 14 move down and are connected with the blanking die 18 and the second punching inner hole respectively. The hole die 20 cooperates to finish blanking and punching the inner hole.

As shown in Fig. 4 and Fig. 5, in the present embodiment, the deburring extrusion die device comprises a second upper template 25, a second lower template 29 positioned directly below the second upper template 25, and a second lower template 29 fixed on the second upper template 25. The second upper mold backing plate 27 of the bottom side, the upper end is fixed on the second upper formwork 25 bottom side and the extrusion punch 26 that the lower end passes through the second upper mold backing plate 27, is fixed on the second lower formwork 29 top side and is positioned at The extrusion die 28 directly below the extrusion punch 26 . During work, the second upper template 25 drives the extrusion punch 26 to move down and cooperates with the extrusion die 28 to complete the extrusion deburring 31 .

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present invention.

Claims (4)

1. a kind of continuous compound fine-punching formation technique of tooth form metallic gasket walk, it is characterised in that：Include the following steps,

1) plate is placed on walk continuously on compound fine-punching formation device, plate is in the continuous compound fine-punching formation device of walk It is sequentially completed in four stations and rushes endoporus and annular incision forming, pre- crowded teeth shape, smart crowded teeth shape, rushes after endoporus and blanking as tooth Shape metallic gasket；

2) tooth form metallic gasket is taken out from compound fine-punching formation device and is put into squeezing for deburring extrusion die assembly by manipulator It presses on mould；

3) extruding punch of deburring extrusion die assembly moves down to coordinate with Extruding die and squeezes tooth form metallic gasket, squeezes recessed The bottom portion of groove edge of mould is fillet, and when tooth form metallic gasket is extruded, the burr of tooth form metallic gasket edge passes through Fillet is folded inward and is extruded embedded tooth form metallic gasket surface.

2. the continuous compound fine-punching formation technique of tooth form metallic gasket walk as described in claim 1, it is characterised in that：Work as tooth When the tooth form of shape metallic gasket is equilateral right angled triangle, the tooth angle that pre- crowded teeth shape is extruded is 55 °, and smart crowded teeth shape squeezes out The tooth angle come is 90 °.

3. the continuous compound fine-punching formation technique of tooth form metallic gasket walk as claimed in claim 1 or 2, it is characterised in that： Continuously compound fine-punching formation device includes the first cope plate, the first lower template immediately below the first cope plate, fixation for walk Endoporus and annular incision forming group are rushed in the first upper die plate of the first cope plate bottom side and along what machine direction was set gradually Part, smart crowded teeth shape component, rushes endoporus and blanking component at pre- crowded teeth shape component；

It rushes endoporus and annular incision forming assembly includes being located at the first holding pad below the first upper die plate, passing through the first upper mold The first transmission rod that plate and the first upper die plate are fixedly connected with the first holding pad, upper end are each attached to the first cope plate bottom side simultaneously And lower end both passes through the lance punch of the first upper die plate and the first holding pad and first and rushes endoporus punch-pin, is each attached under first Template top side and it is located at lance punch and the first notch cavity plate and first for rushing immediately below endoporus punch-pin rushes endoporus cavity plate；

Pre- crowded teeth shape component include be located at the first upper die plate below the second holding pad, pass through the first cope plate and the first upper mold The second transmission rod that backing plate is fixedly connected with the second holding pad, upper end are fixed on the first cope plate bottom side and lower end and pass through first The pre- crowded teeth punch-pin of upper die plate and the second holding pad is fixed on the first lower template top side and immediately below pre- crowded teeth punch-pin Pre- crowded teeth cavity plate；

Smart crowded teeth shape component include be located at the first upper die plate below third holding pad, pass through the first cope plate and the first upper mold Third transmission rod that backing plate is fixedly connected with third holding pad, upper end are fixed on the first cope plate bottom side and lower end and pass through first The smart crowded teeth punch-pin of upper die plate and third holding pad is fixed on the first lower template top side and immediately below smart crowded teeth punch-pin Smart crowded teeth cavity plate；

It rushes endoporus and blanking component is located at the 4th holding pad below the first upper die plate, passes through the first cope plate and the first upper mold The 4th transmission rod that backing plate is fixedly connected with the 4th holding pad, upper end is each attached to the first cope plate bottom side and lower end both passes through The blanking punch of first upper die plate and the 4th holding pad and second rush endoporus punch-pin, be each attached to the first lower template top side and It is located at blanking punch and the second blanking die and second for rushing immediately below endoporus punch-pin rushes endoporus cavity plate.

4. the continuous compound fine-punching formation technique of tooth form metallic gasket walk as claimed in claim 1 or 2, it is characterised in that： Deburring extrusion die assembly includes the second cope plate, the second lower template immediately below the second cope plate, is fixed on second Second upper die plate of template bottom side, upper end are fixed on the second cope plate bottom side and lower end and pass through the extruding of the second upper die plate Punch-pin is fixed on the second lower template top side and the Extruding die immediately below extruding punch.